Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_output.c
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1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD: releng/9.0/sys/netinet/sctp_output.c 228037 2011-11-27 19:13:45Z tuexen $"); 37 38 #include <netinet/sctp_os.h> 39 #include <sys/proc.h> 40 #include <netinet/sctp_var.h> 41 #include <netinet/sctp_sysctl.h> 42 #include <netinet/sctp_header.h> 43 #include <netinet/sctp_pcb.h> 44 #include <netinet/sctputil.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_uio.h> 47 #include <netinet/sctputil.h> 48 #include <netinet/sctp_auth.h> 49 #include <netinet/sctp_timer.h> 50 #include <netinet/sctp_asconf.h> 51 #include <netinet/sctp_indata.h> 52 #include <netinet/sctp_bsd_addr.h> 53 #include <netinet/sctp_input.h> 54 #include <netinet/sctp_crc32.h> 55 #include <netinet/udp.h> 56 #include <machine/in_cksum.h> 57 58 59 60 #define SCTP_MAX_GAPS_INARRAY 4 61 struct sack_track { 62 uint8_t right_edge; /* mergable on the right edge */ 63 uint8_t left_edge; /* mergable on the left edge */ 64 uint8_t num_entries; 65 uint8_t spare; 66 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY]; 67 }; 68 69 struct sack_track sack_array[256] = { 70 {0, 0, 0, 0, /* 0x00 */ 71 {{0, 0}, 72 {0, 0}, 73 {0, 0}, 74 {0, 0} 75 } 76 }, 77 {1, 0, 1, 0, /* 0x01 */ 78 {{0, 0}, 79 {0, 0}, 80 {0, 0}, 81 {0, 0} 82 } 83 }, 84 {0, 0, 1, 0, /* 0x02 */ 85 {{1, 1}, 86 {0, 0}, 87 {0, 0}, 88 {0, 0} 89 } 90 }, 91 {1, 0, 1, 0, /* 0x03 */ 92 {{0, 1}, 93 {0, 0}, 94 {0, 0}, 95 {0, 0} 96 } 97 }, 98 {0, 0, 1, 0, /* 0x04 */ 99 {{2, 2}, 100 {0, 0}, 101 {0, 0}, 102 {0, 0} 103 } 104 }, 105 {1, 0, 2, 0, /* 0x05 */ 106 {{0, 0}, 107 {2, 2}, 108 {0, 0}, 109 {0, 0} 110 } 111 }, 112 {0, 0, 1, 0, /* 0x06 */ 113 {{1, 2}, 114 {0, 0}, 115 {0, 0}, 116 {0, 0} 117 } 118 }, 119 {1, 0, 1, 0, /* 0x07 */ 120 {{0, 2}, 121 {0, 0}, 122 {0, 0}, 123 {0, 0} 124 } 125 }, 126 {0, 0, 1, 0, /* 0x08 */ 127 {{3, 3}, 128 {0, 0}, 129 {0, 0}, 130 {0, 0} 131 } 132 }, 133 {1, 0, 2, 0, /* 0x09 */ 134 {{0, 0}, 135 {3, 3}, 136 {0, 0}, 137 {0, 0} 138 } 139 }, 140 {0, 0, 2, 0, /* 0x0a */ 141 {{1, 1}, 142 {3, 3}, 143 {0, 0}, 144 {0, 0} 145 } 146 }, 147 {1, 0, 2, 0, /* 0x0b */ 148 {{0, 1}, 149 {3, 3}, 150 {0, 0}, 151 {0, 0} 152 } 153 }, 154 {0, 0, 1, 0, /* 0x0c */ 155 {{2, 3}, 156 {0, 0}, 157 {0, 0}, 158 {0, 0} 159 } 160 }, 161 {1, 0, 2, 0, /* 0x0d */ 162 {{0, 0}, 163 {2, 3}, 164 {0, 0}, 165 {0, 0} 166 } 167 }, 168 {0, 0, 1, 0, /* 0x0e */ 169 {{1, 3}, 170 {0, 0}, 171 {0, 0}, 172 {0, 0} 173 } 174 }, 175 {1, 0, 1, 0, /* 0x0f */ 176 {{0, 3}, 177 {0, 0}, 178 {0, 0}, 179 {0, 0} 180 } 181 }, 182 {0, 0, 1, 0, /* 0x10 */ 183 {{4, 4}, 184 {0, 0}, 185 {0, 0}, 186 {0, 0} 187 } 188 }, 189 {1, 0, 2, 0, /* 0x11 */ 190 {{0, 0}, 191 {4, 4}, 192 {0, 0}, 193 {0, 0} 194 } 195 }, 196 {0, 0, 2, 0, /* 0x12 */ 197 {{1, 1}, 198 {4, 4}, 199 {0, 0}, 200 {0, 0} 201 } 202 }, 203 {1, 0, 2, 0, /* 0x13 */ 204 {{0, 1}, 205 {4, 4}, 206 {0, 0}, 207 {0, 0} 208 } 209 }, 210 {0, 0, 2, 0, /* 0x14 */ 211 {{2, 2}, 212 {4, 4}, 213 {0, 0}, 214 {0, 0} 215 } 216 }, 217 {1, 0, 3, 0, /* 0x15 */ 218 {{0, 0}, 219 {2, 2}, 220 {4, 4}, 221 {0, 0} 222 } 223 }, 224 {0, 0, 2, 0, /* 0x16 */ 225 {{1, 2}, 226 {4, 4}, 227 {0, 0}, 228 {0, 0} 229 } 230 }, 231 {1, 0, 2, 0, /* 0x17 */ 232 {{0, 2}, 233 {4, 4}, 234 {0, 0}, 235 {0, 0} 236 } 237 }, 238 {0, 0, 1, 0, /* 0x18 */ 239 {{3, 4}, 240 {0, 0}, 241 {0, 0}, 242 {0, 0} 243 } 244 }, 245 {1, 0, 2, 0, /* 0x19 */ 246 {{0, 0}, 247 {3, 4}, 248 {0, 0}, 249 {0, 0} 250 } 251 }, 252 {0, 0, 2, 0, /* 0x1a */ 253 {{1, 1}, 254 {3, 4}, 255 {0, 0}, 256 {0, 0} 257 } 258 }, 259 {1, 0, 2, 0, /* 0x1b */ 260 {{0, 1}, 261 {3, 4}, 262 {0, 0}, 263 {0, 0} 264 } 265 }, 266 {0, 0, 1, 0, /* 0x1c */ 267 {{2, 4}, 268 {0, 0}, 269 {0, 0}, 270 {0, 0} 271 } 272 }, 273 {1, 0, 2, 0, /* 0x1d */ 274 {{0, 0}, 275 {2, 4}, 276 {0, 0}, 277 {0, 0} 278 } 279 }, 280 {0, 0, 1, 0, /* 0x1e */ 281 {{1, 4}, 282 {0, 0}, 283 {0, 0}, 284 {0, 0} 285 } 286 }, 287 {1, 0, 1, 0, /* 0x1f */ 288 {{0, 4}, 289 {0, 0}, 290 {0, 0}, 291 {0, 0} 292 } 293 }, 294 {0, 0, 1, 0, /* 0x20 */ 295 {{5, 5}, 296 {0, 0}, 297 {0, 0}, 298 {0, 0} 299 } 300 }, 301 {1, 0, 2, 0, /* 0x21 */ 302 {{0, 0}, 303 {5, 5}, 304 {0, 0}, 305 {0, 0} 306 } 307 }, 308 {0, 0, 2, 0, /* 0x22 */ 309 {{1, 1}, 310 {5, 5}, 311 {0, 0}, 312 {0, 0} 313 } 314 }, 315 {1, 0, 2, 0, /* 0x23 */ 316 {{0, 1}, 317 {5, 5}, 318 {0, 0}, 319 {0, 0} 320 } 321 }, 322 {0, 0, 2, 0, /* 0x24 */ 323 {{2, 2}, 324 {5, 5}, 325 {0, 0}, 326 {0, 0} 327 } 328 }, 329 {1, 0, 3, 0, /* 0x25 */ 330 {{0, 0}, 331 {2, 2}, 332 {5, 5}, 333 {0, 0} 334 } 335 }, 336 {0, 0, 2, 0, /* 0x26 */ 337 {{1, 2}, 338 {5, 5}, 339 {0, 0}, 340 {0, 0} 341 } 342 }, 343 {1, 0, 2, 0, /* 0x27 */ 344 {{0, 2}, 345 {5, 5}, 346 {0, 0}, 347 {0, 0} 348 } 349 }, 350 {0, 0, 2, 0, /* 0x28 */ 351 {{3, 3}, 352 {5, 5}, 353 {0, 0}, 354 {0, 0} 355 } 356 }, 357 {1, 0, 3, 0, /* 0x29 */ 358 {{0, 0}, 359 {3, 3}, 360 {5, 5}, 361 {0, 0} 362 } 363 }, 364 {0, 0, 3, 0, /* 0x2a */ 365 {{1, 1}, 366 {3, 3}, 367 {5, 5}, 368 {0, 0} 369 } 370 }, 371 {1, 0, 3, 0, /* 0x2b */ 372 {{0, 1}, 373 {3, 3}, 374 {5, 5}, 375 {0, 0} 376 } 377 }, 378 {0, 0, 2, 0, /* 0x2c */ 379 {{2, 3}, 380 {5, 5}, 381 {0, 0}, 382 {0, 0} 383 } 384 }, 385 {1, 0, 3, 0, /* 0x2d */ 386 {{0, 0}, 387 {2, 3}, 388 {5, 5}, 389 {0, 0} 390 } 391 }, 392 {0, 0, 2, 0, /* 0x2e */ 393 {{1, 3}, 394 {5, 5}, 395 {0, 0}, 396 {0, 0} 397 } 398 }, 399 {1, 0, 2, 0, /* 0x2f */ 400 {{0, 3}, 401 {5, 5}, 402 {0, 0}, 403 {0, 0} 404 } 405 }, 406 {0, 0, 1, 0, /* 0x30 */ 407 {{4, 5}, 408 {0, 0}, 409 {0, 0}, 410 {0, 0} 411 } 412 }, 413 {1, 0, 2, 0, /* 0x31 */ 414 {{0, 0}, 415 {4, 5}, 416 {0, 0}, 417 {0, 0} 418 } 419 }, 420 {0, 0, 2, 0, /* 0x32 */ 421 {{1, 1}, 422 {4, 5}, 423 {0, 0}, 424 {0, 0} 425 } 426 }, 427 {1, 0, 2, 0, /* 0x33 */ 428 {{0, 1}, 429 {4, 5}, 430 {0, 0}, 431 {0, 0} 432 } 433 }, 434 {0, 0, 2, 0, /* 0x34 */ 435 {{2, 2}, 436 {4, 5}, 437 {0, 0}, 438 {0, 0} 439 } 440 }, 441 {1, 0, 3, 0, /* 0x35 */ 442 {{0, 0}, 443 {2, 2}, 444 {4, 5}, 445 {0, 0} 446 } 447 }, 448 {0, 0, 2, 0, /* 0x36 */ 449 {{1, 2}, 450 {4, 5}, 451 {0, 0}, 452 {0, 0} 453 } 454 }, 455 {1, 0, 2, 0, /* 0x37 */ 456 {{0, 2}, 457 {4, 5}, 458 {0, 0}, 459 {0, 0} 460 } 461 }, 462 {0, 0, 1, 0, /* 0x38 */ 463 {{3, 5}, 464 {0, 0}, 465 {0, 0}, 466 {0, 0} 467 } 468 }, 469 {1, 0, 2, 0, /* 0x39 */ 470 {{0, 0}, 471 {3, 5}, 472 {0, 0}, 473 {0, 0} 474 } 475 }, 476 {0, 0, 2, 0, /* 0x3a */ 477 {{1, 1}, 478 {3, 5}, 479 {0, 0}, 480 {0, 0} 481 } 482 }, 483 {1, 0, 2, 0, /* 0x3b */ 484 {{0, 1}, 485 {3, 5}, 486 {0, 0}, 487 {0, 0} 488 } 489 }, 490 {0, 0, 1, 0, /* 0x3c */ 491 {{2, 5}, 492 {0, 0}, 493 {0, 0}, 494 {0, 0} 495 } 496 }, 497 {1, 0, 2, 0, /* 0x3d */ 498 {{0, 0}, 499 {2, 5}, 500 {0, 0}, 501 {0, 0} 502 } 503 }, 504 {0, 0, 1, 0, /* 0x3e */ 505 {{1, 5}, 506 {0, 0}, 507 {0, 0}, 508 {0, 0} 509 } 510 }, 511 {1, 0, 1, 0, /* 0x3f */ 512 {{0, 5}, 513 {0, 0}, 514 {0, 0}, 515 {0, 0} 516 } 517 }, 518 {0, 0, 1, 0, /* 0x40 */ 519 {{6, 6}, 520 {0, 0}, 521 {0, 0}, 522 {0, 0} 523 } 524 }, 525 {1, 0, 2, 0, /* 0x41 */ 526 {{0, 0}, 527 {6, 6}, 528 {0, 0}, 529 {0, 0} 530 } 531 }, 532 {0, 0, 2, 0, /* 0x42 */ 533 {{1, 1}, 534 {6, 6}, 535 {0, 0}, 536 {0, 0} 537 } 538 }, 539 {1, 0, 2, 0, /* 0x43 */ 540 {{0, 1}, 541 {6, 6}, 542 {0, 0}, 543 {0, 0} 544 } 545 }, 546 {0, 0, 2, 0, /* 0x44 */ 547 {{2, 2}, 548 {6, 6}, 549 {0, 0}, 550 {0, 0} 551 } 552 }, 553 {1, 0, 3, 0, /* 0x45 */ 554 {{0, 0}, 555 {2, 2}, 556 {6, 6}, 557 {0, 0} 558 } 559 }, 560 {0, 0, 2, 0, /* 0x46 */ 561 {{1, 2}, 562 {6, 6}, 563 {0, 0}, 564 {0, 0} 565 } 566 }, 567 {1, 0, 2, 0, /* 0x47 */ 568 {{0, 2}, 569 {6, 6}, 570 {0, 0}, 571 {0, 0} 572 } 573 }, 574 {0, 0, 2, 0, /* 0x48 */ 575 {{3, 3}, 576 {6, 6}, 577 {0, 0}, 578 {0, 0} 579 } 580 }, 581 {1, 0, 3, 0, /* 0x49 */ 582 {{0, 0}, 583 {3, 3}, 584 {6, 6}, 585 {0, 0} 586 } 587 }, 588 {0, 0, 3, 0, /* 0x4a */ 589 {{1, 1}, 590 {3, 3}, 591 {6, 6}, 592 {0, 0} 593 } 594 }, 595 {1, 0, 3, 0, /* 0x4b */ 596 {{0, 1}, 597 {3, 3}, 598 {6, 6}, 599 {0, 0} 600 } 601 }, 602 {0, 0, 2, 0, /* 0x4c */ 603 {{2, 3}, 604 {6, 6}, 605 {0, 0}, 606 {0, 0} 607 } 608 }, 609 {1, 0, 3, 0, /* 0x4d */ 610 {{0, 0}, 611 {2, 3}, 612 {6, 6}, 613 {0, 0} 614 } 615 }, 616 {0, 0, 2, 0, /* 0x4e */ 617 {{1, 3}, 618 {6, 6}, 619 {0, 0}, 620 {0, 0} 621 } 622 }, 623 {1, 0, 2, 0, /* 0x4f */ 624 {{0, 3}, 625 {6, 6}, 626 {0, 0}, 627 {0, 0} 628 } 629 }, 630 {0, 0, 2, 0, /* 0x50 */ 631 {{4, 4}, 632 {6, 6}, 633 {0, 0}, 634 {0, 0} 635 } 636 }, 637 {1, 0, 3, 0, /* 0x51 */ 638 {{0, 0}, 639 {4, 4}, 640 {6, 6}, 641 {0, 0} 642 } 643 }, 644 {0, 0, 3, 0, /* 0x52 */ 645 {{1, 1}, 646 {4, 4}, 647 {6, 6}, 648 {0, 0} 649 } 650 }, 651 {1, 0, 3, 0, /* 0x53 */ 652 {{0, 1}, 653 {4, 4}, 654 {6, 6}, 655 {0, 0} 656 } 657 }, 658 {0, 0, 3, 0, /* 0x54 */ 659 {{2, 2}, 660 {4, 4}, 661 {6, 6}, 662 {0, 0} 663 } 664 }, 665 {1, 0, 4, 0, /* 0x55 */ 666 {{0, 0}, 667 {2, 2}, 668 {4, 4}, 669 {6, 6} 670 } 671 }, 672 {0, 0, 3, 0, /* 0x56 */ 673 {{1, 2}, 674 {4, 4}, 675 {6, 6}, 676 {0, 0} 677 } 678 }, 679 {1, 0, 3, 0, /* 0x57 */ 680 {{0, 2}, 681 {4, 4}, 682 {6, 6}, 683 {0, 0} 684 } 685 }, 686 {0, 0, 2, 0, /* 0x58 */ 687 {{3, 4}, 688 {6, 6}, 689 {0, 0}, 690 {0, 0} 691 } 692 }, 693 {1, 0, 3, 0, /* 0x59 */ 694 {{0, 0}, 695 {3, 4}, 696 {6, 6}, 697 {0, 0} 698 } 699 }, 700 {0, 0, 3, 0, /* 0x5a */ 701 {{1, 1}, 702 {3, 4}, 703 {6, 6}, 704 {0, 0} 705 } 706 }, 707 {1, 0, 3, 0, /* 0x5b */ 708 {{0, 1}, 709 {3, 4}, 710 {6, 6}, 711 {0, 0} 712 } 713 }, 714 {0, 0, 2, 0, /* 0x5c */ 715 {{2, 4}, 716 {6, 6}, 717 {0, 0}, 718 {0, 0} 719 } 720 }, 721 {1, 0, 3, 0, /* 0x5d */ 722 {{0, 0}, 723 {2, 4}, 724 {6, 6}, 725 {0, 0} 726 } 727 }, 728 {0, 0, 2, 0, /* 0x5e */ 729 {{1, 4}, 730 {6, 6}, 731 {0, 0}, 732 {0, 0} 733 } 734 }, 735 {1, 0, 2, 0, /* 0x5f */ 736 {{0, 4}, 737 {6, 6}, 738 {0, 0}, 739 {0, 0} 740 } 741 }, 742 {0, 0, 1, 0, /* 0x60 */ 743 {{5, 6}, 744 {0, 0}, 745 {0, 0}, 746 {0, 0} 747 } 748 }, 749 {1, 0, 2, 0, /* 0x61 */ 750 {{0, 0}, 751 {5, 6}, 752 {0, 0}, 753 {0, 0} 754 } 755 }, 756 {0, 0, 2, 0, /* 0x62 */ 757 {{1, 1}, 758 {5, 6}, 759 {0, 0}, 760 {0, 0} 761 } 762 }, 763 {1, 0, 2, 0, /* 0x63 */ 764 {{0, 1}, 765 {5, 6}, 766 {0, 0}, 767 {0, 0} 768 } 769 }, 770 {0, 0, 2, 0, /* 0x64 */ 771 {{2, 2}, 772 {5, 6}, 773 {0, 0}, 774 {0, 0} 775 } 776 }, 777 {1, 0, 3, 0, /* 0x65 */ 778 {{0, 0}, 779 {2, 2}, 780 {5, 6}, 781 {0, 0} 782 } 783 }, 784 {0, 0, 2, 0, /* 0x66 */ 785 {{1, 2}, 786 {5, 6}, 787 {0, 0}, 788 {0, 0} 789 } 790 }, 791 {1, 0, 2, 0, /* 0x67 */ 792 {{0, 2}, 793 {5, 6}, 794 {0, 0}, 795 {0, 0} 796 } 797 }, 798 {0, 0, 2, 0, /* 0x68 */ 799 {{3, 3}, 800 {5, 6}, 801 {0, 0}, 802 {0, 0} 803 } 804 }, 805 {1, 0, 3, 0, /* 0x69 */ 806 {{0, 0}, 807 {3, 3}, 808 {5, 6}, 809 {0, 0} 810 } 811 }, 812 {0, 0, 3, 0, /* 0x6a */ 813 {{1, 1}, 814 {3, 3}, 815 {5, 6}, 816 {0, 0} 817 } 818 }, 819 {1, 0, 3, 0, /* 0x6b */ 820 {{0, 1}, 821 {3, 3}, 822 {5, 6}, 823 {0, 0} 824 } 825 }, 826 {0, 0, 2, 0, /* 0x6c */ 827 {{2, 3}, 828 {5, 6}, 829 {0, 0}, 830 {0, 0} 831 } 832 }, 833 {1, 0, 3, 0, /* 0x6d */ 834 {{0, 0}, 835 {2, 3}, 836 {5, 6}, 837 {0, 0} 838 } 839 }, 840 {0, 0, 2, 0, /* 0x6e */ 841 {{1, 3}, 842 {5, 6}, 843 {0, 0}, 844 {0, 0} 845 } 846 }, 847 {1, 0, 2, 0, /* 0x6f */ 848 {{0, 3}, 849 {5, 6}, 850 {0, 0}, 851 {0, 0} 852 } 853 }, 854 {0, 0, 1, 0, /* 0x70 */ 855 {{4, 6}, 856 {0, 0}, 857 {0, 0}, 858 {0, 0} 859 } 860 }, 861 {1, 0, 2, 0, /* 0x71 */ 862 {{0, 0}, 863 {4, 6}, 864 {0, 0}, 865 {0, 0} 866 } 867 }, 868 {0, 0, 2, 0, /* 0x72 */ 869 {{1, 1}, 870 {4, 6}, 871 {0, 0}, 872 {0, 0} 873 } 874 }, 875 {1, 0, 2, 0, /* 0x73 */ 876 {{0, 1}, 877 {4, 6}, 878 {0, 0}, 879 {0, 0} 880 } 881 }, 882 {0, 0, 2, 0, /* 0x74 */ 883 {{2, 2}, 884 {4, 6}, 885 {0, 0}, 886 {0, 0} 887 } 888 }, 889 {1, 0, 3, 0, /* 0x75 */ 890 {{0, 0}, 891 {2, 2}, 892 {4, 6}, 893 {0, 0} 894 } 895 }, 896 {0, 0, 2, 0, /* 0x76 */ 897 {{1, 2}, 898 {4, 6}, 899 {0, 0}, 900 {0, 0} 901 } 902 }, 903 {1, 0, 2, 0, /* 0x77 */ 904 {{0, 2}, 905 {4, 6}, 906 {0, 0}, 907 {0, 0} 908 } 909 }, 910 {0, 0, 1, 0, /* 0x78 */ 911 {{3, 6}, 912 {0, 0}, 913 {0, 0}, 914 {0, 0} 915 } 916 }, 917 {1, 0, 2, 0, /* 0x79 */ 918 {{0, 0}, 919 {3, 6}, 920 {0, 0}, 921 {0, 0} 922 } 923 }, 924 {0, 0, 2, 0, /* 0x7a */ 925 {{1, 1}, 926 {3, 6}, 927 {0, 0}, 928 {0, 0} 929 } 930 }, 931 {1, 0, 2, 0, /* 0x7b */ 932 {{0, 1}, 933 {3, 6}, 934 {0, 0}, 935 {0, 0} 936 } 937 }, 938 {0, 0, 1, 0, /* 0x7c */ 939 {{2, 6}, 940 {0, 0}, 941 {0, 0}, 942 {0, 0} 943 } 944 }, 945 {1, 0, 2, 0, /* 0x7d */ 946 {{0, 0}, 947 {2, 6}, 948 {0, 0}, 949 {0, 0} 950 } 951 }, 952 {0, 0, 1, 0, /* 0x7e */ 953 {{1, 6}, 954 {0, 0}, 955 {0, 0}, 956 {0, 0} 957 } 958 }, 959 {1, 0, 1, 0, /* 0x7f */ 960 {{0, 6}, 961 {0, 0}, 962 {0, 0}, 963 {0, 0} 964 } 965 }, 966 {0, 1, 1, 0, /* 0x80 */ 967 {{7, 7}, 968 {0, 0}, 969 {0, 0}, 970 {0, 0} 971 } 972 }, 973 {1, 1, 2, 0, /* 0x81 */ 974 {{0, 0}, 975 {7, 7}, 976 {0, 0}, 977 {0, 0} 978 } 979 }, 980 {0, 1, 2, 0, /* 0x82 */ 981 {{1, 1}, 982 {7, 7}, 983 {0, 0}, 984 {0, 0} 985 } 986 }, 987 {1, 1, 2, 0, /* 0x83 */ 988 {{0, 1}, 989 {7, 7}, 990 {0, 0}, 991 {0, 0} 992 } 993 }, 994 {0, 1, 2, 0, /* 0x84 */ 995 {{2, 2}, 996 {7, 7}, 997 {0, 0}, 998 {0, 0} 999 } 1000 }, 1001 {1, 1, 3, 0, /* 0x85 */ 1002 {{0, 0}, 1003 {2, 2}, 1004 {7, 7}, 1005 {0, 0} 1006 } 1007 }, 1008 {0, 1, 2, 0, /* 0x86 */ 1009 {{1, 2}, 1010 {7, 7}, 1011 {0, 0}, 1012 {0, 0} 1013 } 1014 }, 1015 {1, 1, 2, 0, /* 0x87 */ 1016 {{0, 2}, 1017 {7, 7}, 1018 {0, 0}, 1019 {0, 0} 1020 } 1021 }, 1022 {0, 1, 2, 0, /* 0x88 */ 1023 {{3, 3}, 1024 {7, 7}, 1025 {0, 0}, 1026 {0, 0} 1027 } 1028 }, 1029 {1, 1, 3, 0, /* 0x89 */ 1030 {{0, 0}, 1031 {3, 3}, 1032 {7, 7}, 1033 {0, 0} 1034 } 1035 }, 1036 {0, 1, 3, 0, /* 0x8a */ 1037 {{1, 1}, 1038 {3, 3}, 1039 {7, 7}, 1040 {0, 0} 1041 } 1042 }, 1043 {1, 1, 3, 0, /* 0x8b */ 1044 {{0, 1}, 1045 {3, 3}, 1046 {7, 7}, 1047 {0, 0} 1048 } 1049 }, 1050 {0, 1, 2, 0, /* 0x8c */ 1051 {{2, 3}, 1052 {7, 7}, 1053 {0, 0}, 1054 {0, 0} 1055 } 1056 }, 1057 {1, 1, 3, 0, /* 0x8d */ 1058 {{0, 0}, 1059 {2, 3}, 1060 {7, 7}, 1061 {0, 0} 1062 } 1063 }, 1064 {0, 1, 2, 0, /* 0x8e */ 1065 {{1, 3}, 1066 {7, 7}, 1067 {0, 0}, 1068 {0, 0} 1069 } 1070 }, 1071 {1, 1, 2, 0, /* 0x8f */ 1072 {{0, 3}, 1073 {7, 7}, 1074 {0, 0}, 1075 {0, 0} 1076 } 1077 }, 1078 {0, 1, 2, 0, /* 0x90 */ 1079 {{4, 4}, 1080 {7, 7}, 1081 {0, 0}, 1082 {0, 0} 1083 } 1084 }, 1085 {1, 1, 3, 0, /* 0x91 */ 1086 {{0, 0}, 1087 {4, 4}, 1088 {7, 7}, 1089 {0, 0} 1090 } 1091 }, 1092 {0, 1, 3, 0, /* 0x92 */ 1093 {{1, 1}, 1094 {4, 4}, 1095 {7, 7}, 1096 {0, 0} 1097 } 1098 }, 1099 {1, 1, 3, 0, /* 0x93 */ 1100 {{0, 1}, 1101 {4, 4}, 1102 {7, 7}, 1103 {0, 0} 1104 } 1105 }, 1106 {0, 1, 3, 0, /* 0x94 */ 1107 {{2, 2}, 1108 {4, 4}, 1109 {7, 7}, 1110 {0, 0} 1111 } 1112 }, 1113 {1, 1, 4, 0, /* 0x95 */ 1114 {{0, 0}, 1115 {2, 2}, 1116 {4, 4}, 1117 {7, 7} 1118 } 1119 }, 1120 {0, 1, 3, 0, /* 0x96 */ 1121 {{1, 2}, 1122 {4, 4}, 1123 {7, 7}, 1124 {0, 0} 1125 } 1126 }, 1127 {1, 1, 3, 0, /* 0x97 */ 1128 {{0, 2}, 1129 {4, 4}, 1130 {7, 7}, 1131 {0, 0} 1132 } 1133 }, 1134 {0, 1, 2, 0, /* 0x98 */ 1135 {{3, 4}, 1136 {7, 7}, 1137 {0, 0}, 1138 {0, 0} 1139 } 1140 }, 1141 {1, 1, 3, 0, /* 0x99 */ 1142 {{0, 0}, 1143 {3, 4}, 1144 {7, 7}, 1145 {0, 0} 1146 } 1147 }, 1148 {0, 1, 3, 0, /* 0x9a */ 1149 {{1, 1}, 1150 {3, 4}, 1151 {7, 7}, 1152 {0, 0} 1153 } 1154 }, 1155 {1, 1, 3, 0, /* 0x9b */ 1156 {{0, 1}, 1157 {3, 4}, 1158 {7, 7}, 1159 {0, 0} 1160 } 1161 }, 1162 {0, 1, 2, 0, /* 0x9c */ 1163 {{2, 4}, 1164 {7, 7}, 1165 {0, 0}, 1166 {0, 0} 1167 } 1168 }, 1169 {1, 1, 3, 0, /* 0x9d */ 1170 {{0, 0}, 1171 {2, 4}, 1172 {7, 7}, 1173 {0, 0} 1174 } 1175 }, 1176 {0, 1, 2, 0, /* 0x9e */ 1177 {{1, 4}, 1178 {7, 7}, 1179 {0, 0}, 1180 {0, 0} 1181 } 1182 }, 1183 {1, 1, 2, 0, /* 0x9f */ 1184 {{0, 4}, 1185 {7, 7}, 1186 {0, 0}, 1187 {0, 0} 1188 } 1189 }, 1190 {0, 1, 2, 0, /* 0xa0 */ 1191 {{5, 5}, 1192 {7, 7}, 1193 {0, 0}, 1194 {0, 0} 1195 } 1196 }, 1197 {1, 1, 3, 0, /* 0xa1 */ 1198 {{0, 0}, 1199 {5, 5}, 1200 {7, 7}, 1201 {0, 0} 1202 } 1203 }, 1204 {0, 1, 3, 0, /* 0xa2 */ 1205 {{1, 1}, 1206 {5, 5}, 1207 {7, 7}, 1208 {0, 0} 1209 } 1210 }, 1211 {1, 1, 3, 0, /* 0xa3 */ 1212 {{0, 1}, 1213 {5, 5}, 1214 {7, 7}, 1215 {0, 0} 1216 } 1217 }, 1218 {0, 1, 3, 0, /* 0xa4 */ 1219 {{2, 2}, 1220 {5, 5}, 1221 {7, 7}, 1222 {0, 0} 1223 } 1224 }, 1225 {1, 1, 4, 0, /* 0xa5 */ 1226 {{0, 0}, 1227 {2, 2}, 1228 {5, 5}, 1229 {7, 7} 1230 } 1231 }, 1232 {0, 1, 3, 0, /* 0xa6 */ 1233 {{1, 2}, 1234 {5, 5}, 1235 {7, 7}, 1236 {0, 0} 1237 } 1238 }, 1239 {1, 1, 3, 0, /* 0xa7 */ 1240 {{0, 2}, 1241 {5, 5}, 1242 {7, 7}, 1243 {0, 0} 1244 } 1245 }, 1246 {0, 1, 3, 0, /* 0xa8 */ 1247 {{3, 3}, 1248 {5, 5}, 1249 {7, 7}, 1250 {0, 0} 1251 } 1252 }, 1253 {1, 1, 4, 0, /* 0xa9 */ 1254 {{0, 0}, 1255 {3, 3}, 1256 {5, 5}, 1257 {7, 7} 1258 } 1259 }, 1260 {0, 1, 4, 0, /* 0xaa */ 1261 {{1, 1}, 1262 {3, 3}, 1263 {5, 5}, 1264 {7, 7} 1265 } 1266 }, 1267 {1, 1, 4, 0, /* 0xab */ 1268 {{0, 1}, 1269 {3, 3}, 1270 {5, 5}, 1271 {7, 7} 1272 } 1273 }, 1274 {0, 1, 3, 0, /* 0xac */ 1275 {{2, 3}, 1276 {5, 5}, 1277 {7, 7}, 1278 {0, 0} 1279 } 1280 }, 1281 {1, 1, 4, 0, /* 0xad */ 1282 {{0, 0}, 1283 {2, 3}, 1284 {5, 5}, 1285 {7, 7} 1286 } 1287 }, 1288 {0, 1, 3, 0, /* 0xae */ 1289 {{1, 3}, 1290 {5, 5}, 1291 {7, 7}, 1292 {0, 0} 1293 } 1294 }, 1295 {1, 1, 3, 0, /* 0xaf */ 1296 {{0, 3}, 1297 {5, 5}, 1298 {7, 7}, 1299 {0, 0} 1300 } 1301 }, 1302 {0, 1, 2, 0, /* 0xb0 */ 1303 {{4, 5}, 1304 {7, 7}, 1305 {0, 0}, 1306 {0, 0} 1307 } 1308 }, 1309 {1, 1, 3, 0, /* 0xb1 */ 1310 {{0, 0}, 1311 {4, 5}, 1312 {7, 7}, 1313 {0, 0} 1314 } 1315 }, 1316 {0, 1, 3, 0, /* 0xb2 */ 1317 {{1, 1}, 1318 {4, 5}, 1319 {7, 7}, 1320 {0, 0} 1321 } 1322 }, 1323 {1, 1, 3, 0, /* 0xb3 */ 1324 {{0, 1}, 1325 {4, 5}, 1326 {7, 7}, 1327 {0, 0} 1328 } 1329 }, 1330 {0, 1, 3, 0, /* 0xb4 */ 1331 {{2, 2}, 1332 {4, 5}, 1333 {7, 7}, 1334 {0, 0} 1335 } 1336 }, 1337 {1, 1, 4, 0, /* 0xb5 */ 1338 {{0, 0}, 1339 {2, 2}, 1340 {4, 5}, 1341 {7, 7} 1342 } 1343 }, 1344 {0, 1, 3, 0, /* 0xb6 */ 1345 {{1, 2}, 1346 {4, 5}, 1347 {7, 7}, 1348 {0, 0} 1349 } 1350 }, 1351 {1, 1, 3, 0, /* 0xb7 */ 1352 {{0, 2}, 1353 {4, 5}, 1354 {7, 7}, 1355 {0, 0} 1356 } 1357 }, 1358 {0, 1, 2, 0, /* 0xb8 */ 1359 {{3, 5}, 1360 {7, 7}, 1361 {0, 0}, 1362 {0, 0} 1363 } 1364 }, 1365 {1, 1, 3, 0, /* 0xb9 */ 1366 {{0, 0}, 1367 {3, 5}, 1368 {7, 7}, 1369 {0, 0} 1370 } 1371 }, 1372 {0, 1, 3, 0, /* 0xba */ 1373 {{1, 1}, 1374 {3, 5}, 1375 {7, 7}, 1376 {0, 0} 1377 } 1378 }, 1379 {1, 1, 3, 0, /* 0xbb */ 1380 {{0, 1}, 1381 {3, 5}, 1382 {7, 7}, 1383 {0, 0} 1384 } 1385 }, 1386 {0, 1, 2, 0, /* 0xbc */ 1387 {{2, 5}, 1388 {7, 7}, 1389 {0, 0}, 1390 {0, 0} 1391 } 1392 }, 1393 {1, 1, 3, 0, /* 0xbd */ 1394 {{0, 0}, 1395 {2, 5}, 1396 {7, 7}, 1397 {0, 0} 1398 } 1399 }, 1400 {0, 1, 2, 0, /* 0xbe */ 1401 {{1, 5}, 1402 {7, 7}, 1403 {0, 0}, 1404 {0, 0} 1405 } 1406 }, 1407 {1, 1, 2, 0, /* 0xbf */ 1408 {{0, 5}, 1409 {7, 7}, 1410 {0, 0}, 1411 {0, 0} 1412 } 1413 }, 1414 {0, 1, 1, 0, /* 0xc0 */ 1415 {{6, 7}, 1416 {0, 0}, 1417 {0, 0}, 1418 {0, 0} 1419 } 1420 }, 1421 {1, 1, 2, 0, /* 0xc1 */ 1422 {{0, 0}, 1423 {6, 7}, 1424 {0, 0}, 1425 {0, 0} 1426 } 1427 }, 1428 {0, 1, 2, 0, /* 0xc2 */ 1429 {{1, 1}, 1430 {6, 7}, 1431 {0, 0}, 1432 {0, 0} 1433 } 1434 }, 1435 {1, 1, 2, 0, /* 0xc3 */ 1436 {{0, 1}, 1437 {6, 7}, 1438 {0, 0}, 1439 {0, 0} 1440 } 1441 }, 1442 {0, 1, 2, 0, /* 0xc4 */ 1443 {{2, 2}, 1444 {6, 7}, 1445 {0, 0}, 1446 {0, 0} 1447 } 1448 }, 1449 {1, 1, 3, 0, /* 0xc5 */ 1450 {{0, 0}, 1451 {2, 2}, 1452 {6, 7}, 1453 {0, 0} 1454 } 1455 }, 1456 {0, 1, 2, 0, /* 0xc6 */ 1457 {{1, 2}, 1458 {6, 7}, 1459 {0, 0}, 1460 {0, 0} 1461 } 1462 }, 1463 {1, 1, 2, 0, /* 0xc7 */ 1464 {{0, 2}, 1465 {6, 7}, 1466 {0, 0}, 1467 {0, 0} 1468 } 1469 }, 1470 {0, 1, 2, 0, /* 0xc8 */ 1471 {{3, 3}, 1472 {6, 7}, 1473 {0, 0}, 1474 {0, 0} 1475 } 1476 }, 1477 {1, 1, 3, 0, /* 0xc9 */ 1478 {{0, 0}, 1479 {3, 3}, 1480 {6, 7}, 1481 {0, 0} 1482 } 1483 }, 1484 {0, 1, 3, 0, /* 0xca */ 1485 {{1, 1}, 1486 {3, 3}, 1487 {6, 7}, 1488 {0, 0} 1489 } 1490 }, 1491 {1, 1, 3, 0, /* 0xcb */ 1492 {{0, 1}, 1493 {3, 3}, 1494 {6, 7}, 1495 {0, 0} 1496 } 1497 }, 1498 {0, 1, 2, 0, /* 0xcc */ 1499 {{2, 3}, 1500 {6, 7}, 1501 {0, 0}, 1502 {0, 0} 1503 } 1504 }, 1505 {1, 1, 3, 0, /* 0xcd */ 1506 {{0, 0}, 1507 {2, 3}, 1508 {6, 7}, 1509 {0, 0} 1510 } 1511 }, 1512 {0, 1, 2, 0, /* 0xce */ 1513 {{1, 3}, 1514 {6, 7}, 1515 {0, 0}, 1516 {0, 0} 1517 } 1518 }, 1519 {1, 1, 2, 0, /* 0xcf */ 1520 {{0, 3}, 1521 {6, 7}, 1522 {0, 0}, 1523 {0, 0} 1524 } 1525 }, 1526 {0, 1, 2, 0, /* 0xd0 */ 1527 {{4, 4}, 1528 {6, 7}, 1529 {0, 0}, 1530 {0, 0} 1531 } 1532 }, 1533 {1, 1, 3, 0, /* 0xd1 */ 1534 {{0, 0}, 1535 {4, 4}, 1536 {6, 7}, 1537 {0, 0} 1538 } 1539 }, 1540 {0, 1, 3, 0, /* 0xd2 */ 1541 {{1, 1}, 1542 {4, 4}, 1543 {6, 7}, 1544 {0, 0} 1545 } 1546 }, 1547 {1, 1, 3, 0, /* 0xd3 */ 1548 {{0, 1}, 1549 {4, 4}, 1550 {6, 7}, 1551 {0, 0} 1552 } 1553 }, 1554 {0, 1, 3, 0, /* 0xd4 */ 1555 {{2, 2}, 1556 {4, 4}, 1557 {6, 7}, 1558 {0, 0} 1559 } 1560 }, 1561 {1, 1, 4, 0, /* 0xd5 */ 1562 {{0, 0}, 1563 {2, 2}, 1564 {4, 4}, 1565 {6, 7} 1566 } 1567 }, 1568 {0, 1, 3, 0, /* 0xd6 */ 1569 {{1, 2}, 1570 {4, 4}, 1571 {6, 7}, 1572 {0, 0} 1573 } 1574 }, 1575 {1, 1, 3, 0, /* 0xd7 */ 1576 {{0, 2}, 1577 {4, 4}, 1578 {6, 7}, 1579 {0, 0} 1580 } 1581 }, 1582 {0, 1, 2, 0, /* 0xd8 */ 1583 {{3, 4}, 1584 {6, 7}, 1585 {0, 0}, 1586 {0, 0} 1587 } 1588 }, 1589 {1, 1, 3, 0, /* 0xd9 */ 1590 {{0, 0}, 1591 {3, 4}, 1592 {6, 7}, 1593 {0, 0} 1594 } 1595 }, 1596 {0, 1, 3, 0, /* 0xda */ 1597 {{1, 1}, 1598 {3, 4}, 1599 {6, 7}, 1600 {0, 0} 1601 } 1602 }, 1603 {1, 1, 3, 0, /* 0xdb */ 1604 {{0, 1}, 1605 {3, 4}, 1606 {6, 7}, 1607 {0, 0} 1608 } 1609 }, 1610 {0, 1, 2, 0, /* 0xdc */ 1611 {{2, 4}, 1612 {6, 7}, 1613 {0, 0}, 1614 {0, 0} 1615 } 1616 }, 1617 {1, 1, 3, 0, /* 0xdd */ 1618 {{0, 0}, 1619 {2, 4}, 1620 {6, 7}, 1621 {0, 0} 1622 } 1623 }, 1624 {0, 1, 2, 0, /* 0xde */ 1625 {{1, 4}, 1626 {6, 7}, 1627 {0, 0}, 1628 {0, 0} 1629 } 1630 }, 1631 {1, 1, 2, 0, /* 0xdf */ 1632 {{0, 4}, 1633 {6, 7}, 1634 {0, 0}, 1635 {0, 0} 1636 } 1637 }, 1638 {0, 1, 1, 0, /* 0xe0 */ 1639 {{5, 7}, 1640 {0, 0}, 1641 {0, 0}, 1642 {0, 0} 1643 } 1644 }, 1645 {1, 1, 2, 0, /* 0xe1 */ 1646 {{0, 0}, 1647 {5, 7}, 1648 {0, 0}, 1649 {0, 0} 1650 } 1651 }, 1652 {0, 1, 2, 0, /* 0xe2 */ 1653 {{1, 1}, 1654 {5, 7}, 1655 {0, 0}, 1656 {0, 0} 1657 } 1658 }, 1659 {1, 1, 2, 0, /* 0xe3 */ 1660 {{0, 1}, 1661 {5, 7}, 1662 {0, 0}, 1663 {0, 0} 1664 } 1665 }, 1666 {0, 1, 2, 0, /* 0xe4 */ 1667 {{2, 2}, 1668 {5, 7}, 1669 {0, 0}, 1670 {0, 0} 1671 } 1672 }, 1673 {1, 1, 3, 0, /* 0xe5 */ 1674 {{0, 0}, 1675 {2, 2}, 1676 {5, 7}, 1677 {0, 0} 1678 } 1679 }, 1680 {0, 1, 2, 0, /* 0xe6 */ 1681 {{1, 2}, 1682 {5, 7}, 1683 {0, 0}, 1684 {0, 0} 1685 } 1686 }, 1687 {1, 1, 2, 0, /* 0xe7 */ 1688 {{0, 2}, 1689 {5, 7}, 1690 {0, 0}, 1691 {0, 0} 1692 } 1693 }, 1694 {0, 1, 2, 0, /* 0xe8 */ 1695 {{3, 3}, 1696 {5, 7}, 1697 {0, 0}, 1698 {0, 0} 1699 } 1700 }, 1701 {1, 1, 3, 0, /* 0xe9 */ 1702 {{0, 0}, 1703 {3, 3}, 1704 {5, 7}, 1705 {0, 0} 1706 } 1707 }, 1708 {0, 1, 3, 0, /* 0xea */ 1709 {{1, 1}, 1710 {3, 3}, 1711 {5, 7}, 1712 {0, 0} 1713 } 1714 }, 1715 {1, 1, 3, 0, /* 0xeb */ 1716 {{0, 1}, 1717 {3, 3}, 1718 {5, 7}, 1719 {0, 0} 1720 } 1721 }, 1722 {0, 1, 2, 0, /* 0xec */ 1723 {{2, 3}, 1724 {5, 7}, 1725 {0, 0}, 1726 {0, 0} 1727 } 1728 }, 1729 {1, 1, 3, 0, /* 0xed */ 1730 {{0, 0}, 1731 {2, 3}, 1732 {5, 7}, 1733 {0, 0} 1734 } 1735 }, 1736 {0, 1, 2, 0, /* 0xee */ 1737 {{1, 3}, 1738 {5, 7}, 1739 {0, 0}, 1740 {0, 0} 1741 } 1742 }, 1743 {1, 1, 2, 0, /* 0xef */ 1744 {{0, 3}, 1745 {5, 7}, 1746 {0, 0}, 1747 {0, 0} 1748 } 1749 }, 1750 {0, 1, 1, 0, /* 0xf0 */ 1751 {{4, 7}, 1752 {0, 0}, 1753 {0, 0}, 1754 {0, 0} 1755 } 1756 }, 1757 {1, 1, 2, 0, /* 0xf1 */ 1758 {{0, 0}, 1759 {4, 7}, 1760 {0, 0}, 1761 {0, 0} 1762 } 1763 }, 1764 {0, 1, 2, 0, /* 0xf2 */ 1765 {{1, 1}, 1766 {4, 7}, 1767 {0, 0}, 1768 {0, 0} 1769 } 1770 }, 1771 {1, 1, 2, 0, /* 0xf3 */ 1772 {{0, 1}, 1773 {4, 7}, 1774 {0, 0}, 1775 {0, 0} 1776 } 1777 }, 1778 {0, 1, 2, 0, /* 0xf4 */ 1779 {{2, 2}, 1780 {4, 7}, 1781 {0, 0}, 1782 {0, 0} 1783 } 1784 }, 1785 {1, 1, 3, 0, /* 0xf5 */ 1786 {{0, 0}, 1787 {2, 2}, 1788 {4, 7}, 1789 {0, 0} 1790 } 1791 }, 1792 {0, 1, 2, 0, /* 0xf6 */ 1793 {{1, 2}, 1794 {4, 7}, 1795 {0, 0}, 1796 {0, 0} 1797 } 1798 }, 1799 {1, 1, 2, 0, /* 0xf7 */ 1800 {{0, 2}, 1801 {4, 7}, 1802 {0, 0}, 1803 {0, 0} 1804 } 1805 }, 1806 {0, 1, 1, 0, /* 0xf8 */ 1807 {{3, 7}, 1808 {0, 0}, 1809 {0, 0}, 1810 {0, 0} 1811 } 1812 }, 1813 {1, 1, 2, 0, /* 0xf9 */ 1814 {{0, 0}, 1815 {3, 7}, 1816 {0, 0}, 1817 {0, 0} 1818 } 1819 }, 1820 {0, 1, 2, 0, /* 0xfa */ 1821 {{1, 1}, 1822 {3, 7}, 1823 {0, 0}, 1824 {0, 0} 1825 } 1826 }, 1827 {1, 1, 2, 0, /* 0xfb */ 1828 {{0, 1}, 1829 {3, 7}, 1830 {0, 0}, 1831 {0, 0} 1832 } 1833 }, 1834 {0, 1, 1, 0, /* 0xfc */ 1835 {{2, 7}, 1836 {0, 0}, 1837 {0, 0}, 1838 {0, 0} 1839 } 1840 }, 1841 {1, 1, 2, 0, /* 0xfd */ 1842 {{0, 0}, 1843 {2, 7}, 1844 {0, 0}, 1845 {0, 0} 1846 } 1847 }, 1848 {0, 1, 1, 0, /* 0xfe */ 1849 {{1, 7}, 1850 {0, 0}, 1851 {0, 0}, 1852 {0, 0} 1853 } 1854 }, 1855 {1, 1, 1, 0, /* 0xff */ 1856 {{0, 7}, 1857 {0, 0}, 1858 {0, 0}, 1859 {0, 0} 1860 } 1861 } 1862 }; 1863 1864 1865 int 1866 sctp_is_address_in_scope(struct sctp_ifa *ifa, 1867 int ipv4_addr_legal, 1868 int ipv6_addr_legal, 1869 int loopback_scope, 1870 int ipv4_local_scope, 1871 int local_scope, 1872 int site_scope, 1873 int do_update) 1874 { 1875 if ((loopback_scope == 0) && 1876 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) { 1877 /* 1878 * skip loopback if not in scope * 1879 */ 1880 return (0); 1881 } 1882 switch (ifa->address.sa.sa_family) { 1883 #ifdef INET 1884 case AF_INET: 1885 if (ipv4_addr_legal) { 1886 struct sockaddr_in *sin; 1887 1888 sin = (struct sockaddr_in *)&ifa->address.sin; 1889 if (sin->sin_addr.s_addr == 0) { 1890 /* not in scope , unspecified */ 1891 return (0); 1892 } 1893 if ((ipv4_local_scope == 0) && 1894 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 1895 /* private address not in scope */ 1896 return (0); 1897 } 1898 } else { 1899 return (0); 1900 } 1901 break; 1902 #endif 1903 #ifdef INET6 1904 case AF_INET6: 1905 if (ipv6_addr_legal) { 1906 struct sockaddr_in6 *sin6; 1907 1908 /* 1909 * Must update the flags, bummer, which means any 1910 * IFA locks must now be applied HERE <-> 1911 */ 1912 if (do_update) { 1913 sctp_gather_internal_ifa_flags(ifa); 1914 } 1915 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1916 return (0); 1917 } 1918 /* ok to use deprecated addresses? */ 1919 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 1920 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1921 /* skip unspecifed addresses */ 1922 return (0); 1923 } 1924 if ( /* (local_scope == 0) && */ 1925 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 1926 return (0); 1927 } 1928 if ((site_scope == 0) && 1929 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1930 return (0); 1931 } 1932 } else { 1933 return (0); 1934 } 1935 break; 1936 #endif 1937 default: 1938 return (0); 1939 } 1940 return (1); 1941 } 1942 1943 static struct mbuf * 1944 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa) 1945 { 1946 struct sctp_paramhdr *parmh; 1947 struct mbuf *mret; 1948 int len; 1949 1950 switch (ifa->address.sa.sa_family) { 1951 #ifdef INET 1952 case AF_INET: 1953 len = sizeof(struct sctp_ipv4addr_param); 1954 break; 1955 #endif 1956 #ifdef INET6 1957 case AF_INET6: 1958 len = sizeof(struct sctp_ipv6addr_param); 1959 break; 1960 #endif 1961 default: 1962 return (m); 1963 } 1964 if (M_TRAILINGSPACE(m) >= len) { 1965 /* easy side we just drop it on the end */ 1966 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m))); 1967 mret = m; 1968 } else { 1969 /* Need more space */ 1970 mret = m; 1971 while (SCTP_BUF_NEXT(mret) != NULL) { 1972 mret = SCTP_BUF_NEXT(mret); 1973 } 1974 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(len, 0, M_DONTWAIT, 1, MT_DATA); 1975 if (SCTP_BUF_NEXT(mret) == NULL) { 1976 /* We are hosed, can't add more addresses */ 1977 return (m); 1978 } 1979 mret = SCTP_BUF_NEXT(mret); 1980 parmh = mtod(mret, struct sctp_paramhdr *); 1981 } 1982 /* now add the parameter */ 1983 switch (ifa->address.sa.sa_family) { 1984 #ifdef INET 1985 case AF_INET: 1986 { 1987 struct sctp_ipv4addr_param *ipv4p; 1988 struct sockaddr_in *sin; 1989 1990 sin = (struct sockaddr_in *)&ifa->address.sin; 1991 ipv4p = (struct sctp_ipv4addr_param *)parmh; 1992 parmh->param_type = htons(SCTP_IPV4_ADDRESS); 1993 parmh->param_length = htons(len); 1994 ipv4p->addr = sin->sin_addr.s_addr; 1995 SCTP_BUF_LEN(mret) += len; 1996 break; 1997 } 1998 #endif 1999 #ifdef INET6 2000 case AF_INET6: 2001 { 2002 struct sctp_ipv6addr_param *ipv6p; 2003 struct sockaddr_in6 *sin6; 2004 2005 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 2006 ipv6p = (struct sctp_ipv6addr_param *)parmh; 2007 parmh->param_type = htons(SCTP_IPV6_ADDRESS); 2008 parmh->param_length = htons(len); 2009 memcpy(ipv6p->addr, &sin6->sin6_addr, 2010 sizeof(ipv6p->addr)); 2011 /* clear embedded scope in the address */ 2012 in6_clearscope((struct in6_addr *)ipv6p->addr); 2013 SCTP_BUF_LEN(mret) += len; 2014 break; 2015 } 2016 #endif 2017 default: 2018 return (m); 2019 } 2020 return (mret); 2021 } 2022 2023 2024 struct mbuf * 2025 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2026 struct sctp_scoping *scope, 2027 struct mbuf *m_at, int cnt_inits_to) 2028 { 2029 struct sctp_vrf *vrf = NULL; 2030 int cnt, limit_out = 0, total_count; 2031 uint32_t vrf_id; 2032 2033 vrf_id = inp->def_vrf_id; 2034 SCTP_IPI_ADDR_RLOCK(); 2035 vrf = sctp_find_vrf(vrf_id); 2036 if (vrf == NULL) { 2037 SCTP_IPI_ADDR_RUNLOCK(); 2038 return (m_at); 2039 } 2040 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 2041 struct sctp_ifa *sctp_ifap; 2042 struct sctp_ifn *sctp_ifnp; 2043 2044 cnt = cnt_inits_to; 2045 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) { 2046 limit_out = 1; 2047 cnt = SCTP_ADDRESS_LIMIT; 2048 goto skip_count; 2049 } 2050 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 2051 if ((scope->loopback_scope == 0) && 2052 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { 2053 /* 2054 * Skip loopback devices if loopback_scope 2055 * not set 2056 */ 2057 continue; 2058 } 2059 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 2060 if (sctp_is_addr_restricted(stcb, sctp_ifap)) { 2061 continue; 2062 } 2063 if (sctp_is_address_in_scope(sctp_ifap, 2064 scope->ipv4_addr_legal, 2065 scope->ipv6_addr_legal, 2066 scope->loopback_scope, 2067 scope->ipv4_local_scope, 2068 scope->local_scope, 2069 scope->site_scope, 1) == 0) { 2070 continue; 2071 } 2072 cnt++; 2073 if (cnt > SCTP_ADDRESS_LIMIT) { 2074 break; 2075 } 2076 } 2077 if (cnt > SCTP_ADDRESS_LIMIT) { 2078 break; 2079 } 2080 } 2081 skip_count: 2082 if (cnt > 1) { 2083 total_count = 0; 2084 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 2085 cnt = 0; 2086 if ((scope->loopback_scope == 0) && 2087 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { 2088 /* 2089 * Skip loopback devices if 2090 * loopback_scope not set 2091 */ 2092 continue; 2093 } 2094 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 2095 if (sctp_is_addr_restricted(stcb, sctp_ifap)) { 2096 continue; 2097 } 2098 if (sctp_is_address_in_scope(sctp_ifap, 2099 scope->ipv4_addr_legal, 2100 scope->ipv6_addr_legal, 2101 scope->loopback_scope, 2102 scope->ipv4_local_scope, 2103 scope->local_scope, 2104 scope->site_scope, 0) == 0) { 2105 continue; 2106 } 2107 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap); 2108 if (limit_out) { 2109 cnt++; 2110 total_count++; 2111 if (cnt >= 2) { 2112 /* 2113 * two from each 2114 * address 2115 */ 2116 break; 2117 } 2118 if (total_count > SCTP_ADDRESS_LIMIT) { 2119 /* No more addresses */ 2120 break; 2121 } 2122 } 2123 } 2124 } 2125 } 2126 } else { 2127 struct sctp_laddr *laddr; 2128 2129 cnt = cnt_inits_to; 2130 /* First, how many ? */ 2131 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2132 if (laddr->ifa == NULL) { 2133 continue; 2134 } 2135 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 2136 /* 2137 * Address being deleted by the system, dont 2138 * list. 2139 */ 2140 continue; 2141 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2142 /* 2143 * Address being deleted on this ep don't 2144 * list. 2145 */ 2146 continue; 2147 } 2148 if (sctp_is_address_in_scope(laddr->ifa, 2149 scope->ipv4_addr_legal, 2150 scope->ipv6_addr_legal, 2151 scope->loopback_scope, 2152 scope->ipv4_local_scope, 2153 scope->local_scope, 2154 scope->site_scope, 1) == 0) { 2155 continue; 2156 } 2157 cnt++; 2158 } 2159 if (cnt > SCTP_ADDRESS_LIMIT) { 2160 limit_out = 1; 2161 } 2162 /* 2163 * To get through a NAT we only list addresses if we have 2164 * more than one. That way if you just bind a single address 2165 * we let the source of the init dictate our address. 2166 */ 2167 if (cnt > 1) { 2168 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2169 cnt = 0; 2170 if (laddr->ifa == NULL) { 2171 continue; 2172 } 2173 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 2174 continue; 2175 2176 if (sctp_is_address_in_scope(laddr->ifa, 2177 scope->ipv4_addr_legal, 2178 scope->ipv6_addr_legal, 2179 scope->loopback_scope, 2180 scope->ipv4_local_scope, 2181 scope->local_scope, 2182 scope->site_scope, 0) == 0) { 2183 continue; 2184 } 2185 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa); 2186 cnt++; 2187 if (cnt >= SCTP_ADDRESS_LIMIT) { 2188 break; 2189 } 2190 } 2191 } 2192 } 2193 SCTP_IPI_ADDR_RUNLOCK(); 2194 return (m_at); 2195 } 2196 2197 static struct sctp_ifa * 2198 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa, 2199 uint8_t dest_is_loop, 2200 uint8_t dest_is_priv, 2201 sa_family_t fam) 2202 { 2203 uint8_t dest_is_global = 0; 2204 2205 /* dest_is_priv is true if destination is a private address */ 2206 /* dest_is_loop is true if destination is a loopback addresses */ 2207 2208 /** 2209 * Here we determine if its a preferred address. A preferred address 2210 * means it is the same scope or higher scope then the destination. 2211 * L = loopback, P = private, G = global 2212 * ----------------------------------------- 2213 * src | dest | result 2214 * ---------------------------------------- 2215 * L | L | yes 2216 * ----------------------------------------- 2217 * P | L | yes-v4 no-v6 2218 * ----------------------------------------- 2219 * G | L | yes-v4 no-v6 2220 * ----------------------------------------- 2221 * L | P | no 2222 * ----------------------------------------- 2223 * P | P | yes 2224 * ----------------------------------------- 2225 * G | P | no 2226 * ----------------------------------------- 2227 * L | G | no 2228 * ----------------------------------------- 2229 * P | G | no 2230 * ----------------------------------------- 2231 * G | G | yes 2232 * ----------------------------------------- 2233 */ 2234 2235 if (ifa->address.sa.sa_family != fam) { 2236 /* forget mis-matched family */ 2237 return (NULL); 2238 } 2239 if ((dest_is_priv == 0) && (dest_is_loop == 0)) { 2240 dest_is_global = 1; 2241 } 2242 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:"); 2243 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa); 2244 /* Ok the address may be ok */ 2245 #ifdef INET6 2246 if (fam == AF_INET6) { 2247 /* ok to use deprecated addresses? no lets not! */ 2248 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2249 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n"); 2250 return (NULL); 2251 } 2252 if (ifa->src_is_priv && !ifa->src_is_loop) { 2253 if (dest_is_loop) { 2254 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n"); 2255 return (NULL); 2256 } 2257 } 2258 if (ifa->src_is_glob) { 2259 if (dest_is_loop) { 2260 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n"); 2261 return (NULL); 2262 } 2263 } 2264 } 2265 #endif 2266 /* 2267 * Now that we know what is what, implement or table this could in 2268 * theory be done slicker (it used to be), but this is 2269 * straightforward and easier to validate :-) 2270 */ 2271 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n", 2272 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob); 2273 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n", 2274 dest_is_loop, dest_is_priv, dest_is_global); 2275 2276 if ((ifa->src_is_loop) && (dest_is_priv)) { 2277 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n"); 2278 return (NULL); 2279 } 2280 if ((ifa->src_is_glob) && (dest_is_priv)) { 2281 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n"); 2282 return (NULL); 2283 } 2284 if ((ifa->src_is_loop) && (dest_is_global)) { 2285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n"); 2286 return (NULL); 2287 } 2288 if ((ifa->src_is_priv) && (dest_is_global)) { 2289 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n"); 2290 return (NULL); 2291 } 2292 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n"); 2293 /* its a preferred address */ 2294 return (ifa); 2295 } 2296 2297 static struct sctp_ifa * 2298 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa, 2299 uint8_t dest_is_loop, 2300 uint8_t dest_is_priv, 2301 sa_family_t fam) 2302 { 2303 uint8_t dest_is_global = 0; 2304 2305 /** 2306 * Here we determine if its a acceptable address. A acceptable 2307 * address means it is the same scope or higher scope but we can 2308 * allow for NAT which means its ok to have a global dest and a 2309 * private src. 2310 * 2311 * L = loopback, P = private, G = global 2312 * ----------------------------------------- 2313 * src | dest | result 2314 * ----------------------------------------- 2315 * L | L | yes 2316 * ----------------------------------------- 2317 * P | L | yes-v4 no-v6 2318 * ----------------------------------------- 2319 * G | L | yes 2320 * ----------------------------------------- 2321 * L | P | no 2322 * ----------------------------------------- 2323 * P | P | yes 2324 * ----------------------------------------- 2325 * G | P | yes - May not work 2326 * ----------------------------------------- 2327 * L | G | no 2328 * ----------------------------------------- 2329 * P | G | yes - May not work 2330 * ----------------------------------------- 2331 * G | G | yes 2332 * ----------------------------------------- 2333 */ 2334 2335 if (ifa->address.sa.sa_family != fam) { 2336 /* forget non matching family */ 2337 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n", 2338 ifa->address.sa.sa_family, fam); 2339 return (NULL); 2340 } 2341 /* Ok the address may be ok */ 2342 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa); 2343 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n", 2344 dest_is_loop, dest_is_priv); 2345 if ((dest_is_loop == 0) && (dest_is_priv == 0)) { 2346 dest_is_global = 1; 2347 } 2348 #ifdef INET6 2349 if (fam == AF_INET6) { 2350 /* ok to use deprecated addresses? */ 2351 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2352 return (NULL); 2353 } 2354 if (ifa->src_is_priv) { 2355 /* Special case, linklocal to loop */ 2356 if (dest_is_loop) 2357 return (NULL); 2358 } 2359 } 2360 #endif 2361 /* 2362 * Now that we know what is what, implement our table. This could in 2363 * theory be done slicker (it used to be), but this is 2364 * straightforward and easier to validate :-) 2365 */ 2366 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n", 2367 ifa->src_is_loop, 2368 dest_is_priv); 2369 if ((ifa->src_is_loop == 1) && (dest_is_priv)) { 2370 return (NULL); 2371 } 2372 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n", 2373 ifa->src_is_loop, 2374 dest_is_global); 2375 if ((ifa->src_is_loop == 1) && (dest_is_global)) { 2376 return (NULL); 2377 } 2378 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n"); 2379 /* its an acceptable address */ 2380 return (ifa); 2381 } 2382 2383 int 2384 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 2385 { 2386 struct sctp_laddr *laddr; 2387 2388 if (stcb == NULL) { 2389 /* There are no restrictions, no TCB :-) */ 2390 return (0); 2391 } 2392 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 2393 if (laddr->ifa == NULL) { 2394 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n", 2395 __FUNCTION__); 2396 continue; 2397 } 2398 if (laddr->ifa == ifa) { 2399 /* Yes it is on the list */ 2400 return (1); 2401 } 2402 } 2403 return (0); 2404 } 2405 2406 2407 int 2408 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 2409 { 2410 struct sctp_laddr *laddr; 2411 2412 if (ifa == NULL) 2413 return (0); 2414 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2415 if (laddr->ifa == NULL) { 2416 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n", 2417 __FUNCTION__); 2418 continue; 2419 } 2420 if ((laddr->ifa == ifa) && laddr->action == 0) 2421 /* same pointer */ 2422 return (1); 2423 } 2424 return (0); 2425 } 2426 2427 2428 2429 static struct sctp_ifa * 2430 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp, 2431 sctp_route_t * ro, 2432 uint32_t vrf_id, 2433 int non_asoc_addr_ok, 2434 uint8_t dest_is_priv, 2435 uint8_t dest_is_loop, 2436 sa_family_t fam) 2437 { 2438 struct sctp_laddr *laddr, *starting_point; 2439 void *ifn; 2440 int resettotop = 0; 2441 struct sctp_ifn *sctp_ifn; 2442 struct sctp_ifa *sctp_ifa, *sifa; 2443 struct sctp_vrf *vrf; 2444 uint32_t ifn_index; 2445 2446 vrf = sctp_find_vrf(vrf_id); 2447 if (vrf == NULL) 2448 return (NULL); 2449 2450 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2451 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2452 sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2453 /* 2454 * first question, is the ifn we will emit on in our list, if so, we 2455 * want such an address. Note that we first looked for a preferred 2456 * address. 2457 */ 2458 if (sctp_ifn) { 2459 /* is a preferred one on the interface we route out? */ 2460 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2461 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2462 (non_asoc_addr_ok == 0)) 2463 continue; 2464 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, 2465 dest_is_loop, 2466 dest_is_priv, fam); 2467 if (sifa == NULL) 2468 continue; 2469 if (sctp_is_addr_in_ep(inp, sifa)) { 2470 atomic_add_int(&sifa->refcount, 1); 2471 return (sifa); 2472 } 2473 } 2474 } 2475 /* 2476 * ok, now we now need to find one on the list of the addresses. We 2477 * can't get one on the emitting interface so let's find first a 2478 * preferred one. If not that an acceptable one otherwise... we 2479 * return NULL. 2480 */ 2481 starting_point = inp->next_addr_touse; 2482 once_again: 2483 if (inp->next_addr_touse == NULL) { 2484 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); 2485 resettotop = 1; 2486 } 2487 for (laddr = inp->next_addr_touse; laddr; 2488 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2489 if (laddr->ifa == NULL) { 2490 /* address has been removed */ 2491 continue; 2492 } 2493 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2494 /* address is being deleted */ 2495 continue; 2496 } 2497 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, 2498 dest_is_priv, fam); 2499 if (sifa == NULL) 2500 continue; 2501 atomic_add_int(&sifa->refcount, 1); 2502 return (sifa); 2503 } 2504 if (resettotop == 0) { 2505 inp->next_addr_touse = NULL; 2506 goto once_again; 2507 } 2508 inp->next_addr_touse = starting_point; 2509 resettotop = 0; 2510 once_again_too: 2511 if (inp->next_addr_touse == NULL) { 2512 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); 2513 resettotop = 1; 2514 } 2515 /* ok, what about an acceptable address in the inp */ 2516 for (laddr = inp->next_addr_touse; laddr; 2517 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2518 if (laddr->ifa == NULL) { 2519 /* address has been removed */ 2520 continue; 2521 } 2522 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2523 /* address is being deleted */ 2524 continue; 2525 } 2526 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, 2527 dest_is_priv, fam); 2528 if (sifa == NULL) 2529 continue; 2530 atomic_add_int(&sifa->refcount, 1); 2531 return (sifa); 2532 } 2533 if (resettotop == 0) { 2534 inp->next_addr_touse = NULL; 2535 goto once_again_too; 2536 } 2537 /* 2538 * no address bound can be a source for the destination we are in 2539 * trouble 2540 */ 2541 return (NULL); 2542 } 2543 2544 2545 2546 static struct sctp_ifa * 2547 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp, 2548 struct sctp_tcb *stcb, 2549 struct sctp_nets *net, 2550 sctp_route_t * ro, 2551 uint32_t vrf_id, 2552 uint8_t dest_is_priv, 2553 uint8_t dest_is_loop, 2554 int non_asoc_addr_ok, 2555 sa_family_t fam) 2556 { 2557 struct sctp_laddr *laddr, *starting_point; 2558 void *ifn; 2559 struct sctp_ifn *sctp_ifn; 2560 struct sctp_ifa *sctp_ifa, *sifa; 2561 uint8_t start_at_beginning = 0; 2562 struct sctp_vrf *vrf; 2563 uint32_t ifn_index; 2564 2565 /* 2566 * first question, is the ifn we will emit on in our list, if so, we 2567 * want that one. 2568 */ 2569 vrf = sctp_find_vrf(vrf_id); 2570 if (vrf == NULL) 2571 return (NULL); 2572 2573 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2574 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2575 sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2576 2577 /* 2578 * first question, is the ifn we will emit on in our list? If so, 2579 * we want that one. First we look for a preferred. Second, we go 2580 * for an acceptable. 2581 */ 2582 if (sctp_ifn) { 2583 /* first try for a preferred address on the ep */ 2584 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2585 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2586 continue; 2587 if (sctp_is_addr_in_ep(inp, sctp_ifa)) { 2588 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam); 2589 if (sifa == NULL) 2590 continue; 2591 if (((non_asoc_addr_ok == 0) && 2592 (sctp_is_addr_restricted(stcb, sifa))) || 2593 (non_asoc_addr_ok && 2594 (sctp_is_addr_restricted(stcb, sifa)) && 2595 (!sctp_is_addr_pending(stcb, sifa)))) { 2596 /* on the no-no list */ 2597 continue; 2598 } 2599 atomic_add_int(&sifa->refcount, 1); 2600 return (sifa); 2601 } 2602 } 2603 /* next try for an acceptable address on the ep */ 2604 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2605 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2606 continue; 2607 if (sctp_is_addr_in_ep(inp, sctp_ifa)) { 2608 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam); 2609 if (sifa == NULL) 2610 continue; 2611 if (((non_asoc_addr_ok == 0) && 2612 (sctp_is_addr_restricted(stcb, sifa))) || 2613 (non_asoc_addr_ok && 2614 (sctp_is_addr_restricted(stcb, sifa)) && 2615 (!sctp_is_addr_pending(stcb, sifa)))) { 2616 /* on the no-no list */ 2617 continue; 2618 } 2619 atomic_add_int(&sifa->refcount, 1); 2620 return (sifa); 2621 } 2622 } 2623 2624 } 2625 /* 2626 * if we can't find one like that then we must look at all addresses 2627 * bound to pick one at first preferable then secondly acceptable. 2628 */ 2629 starting_point = stcb->asoc.last_used_address; 2630 sctp_from_the_top: 2631 if (stcb->asoc.last_used_address == NULL) { 2632 start_at_beginning = 1; 2633 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); 2634 } 2635 /* search beginning with the last used address */ 2636 for (laddr = stcb->asoc.last_used_address; laddr; 2637 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2638 if (laddr->ifa == NULL) { 2639 /* address has been removed */ 2640 continue; 2641 } 2642 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2643 /* address is being deleted */ 2644 continue; 2645 } 2646 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam); 2647 if (sifa == NULL) 2648 continue; 2649 if (((non_asoc_addr_ok == 0) && 2650 (sctp_is_addr_restricted(stcb, sifa))) || 2651 (non_asoc_addr_ok && 2652 (sctp_is_addr_restricted(stcb, sifa)) && 2653 (!sctp_is_addr_pending(stcb, sifa)))) { 2654 /* on the no-no list */ 2655 continue; 2656 } 2657 stcb->asoc.last_used_address = laddr; 2658 atomic_add_int(&sifa->refcount, 1); 2659 return (sifa); 2660 } 2661 if (start_at_beginning == 0) { 2662 stcb->asoc.last_used_address = NULL; 2663 goto sctp_from_the_top; 2664 } 2665 /* now try for any higher scope than the destination */ 2666 stcb->asoc.last_used_address = starting_point; 2667 start_at_beginning = 0; 2668 sctp_from_the_top2: 2669 if (stcb->asoc.last_used_address == NULL) { 2670 start_at_beginning = 1; 2671 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); 2672 } 2673 /* search beginning with the last used address */ 2674 for (laddr = stcb->asoc.last_used_address; laddr; 2675 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2676 if (laddr->ifa == NULL) { 2677 /* address has been removed */ 2678 continue; 2679 } 2680 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2681 /* address is being deleted */ 2682 continue; 2683 } 2684 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, 2685 dest_is_priv, fam); 2686 if (sifa == NULL) 2687 continue; 2688 if (((non_asoc_addr_ok == 0) && 2689 (sctp_is_addr_restricted(stcb, sifa))) || 2690 (non_asoc_addr_ok && 2691 (sctp_is_addr_restricted(stcb, sifa)) && 2692 (!sctp_is_addr_pending(stcb, sifa)))) { 2693 /* on the no-no list */ 2694 continue; 2695 } 2696 stcb->asoc.last_used_address = laddr; 2697 atomic_add_int(&sifa->refcount, 1); 2698 return (sifa); 2699 } 2700 if (start_at_beginning == 0) { 2701 stcb->asoc.last_used_address = NULL; 2702 goto sctp_from_the_top2; 2703 } 2704 return (NULL); 2705 } 2706 2707 static struct sctp_ifa * 2708 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn, 2709 struct sctp_tcb *stcb, 2710 int non_asoc_addr_ok, 2711 uint8_t dest_is_loop, 2712 uint8_t dest_is_priv, 2713 int addr_wanted, 2714 sa_family_t fam, 2715 sctp_route_t * ro 2716 ) 2717 { 2718 struct sctp_ifa *ifa, *sifa; 2719 int num_eligible_addr = 0; 2720 2721 #ifdef INET6 2722 struct sockaddr_in6 sin6, lsa6; 2723 2724 if (fam == AF_INET6) { 2725 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6)); 2726 (void)sa6_recoverscope(&sin6); 2727 } 2728 #endif /* INET6 */ 2729 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { 2730 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2731 (non_asoc_addr_ok == 0)) 2732 continue; 2733 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, 2734 dest_is_priv, fam); 2735 if (sifa == NULL) 2736 continue; 2737 #ifdef INET6 2738 if (fam == AF_INET6 && 2739 dest_is_loop && 2740 sifa->src_is_loop && sifa->src_is_priv) { 2741 /* 2742 * don't allow fe80::1 to be a src on loop ::1, we 2743 * don't list it to the peer so we will get an 2744 * abort. 2745 */ 2746 continue; 2747 } 2748 if (fam == AF_INET6 && 2749 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) && 2750 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 2751 /* 2752 * link-local <-> link-local must belong to the same 2753 * scope. 2754 */ 2755 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6)); 2756 (void)sa6_recoverscope(&lsa6); 2757 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) { 2758 continue; 2759 } 2760 } 2761 #endif /* INET6 */ 2762 2763 /* 2764 * Check if the IPv6 address matches to next-hop. In the 2765 * mobile case, old IPv6 address may be not deleted from the 2766 * interface. Then, the interface has previous and new 2767 * addresses. We should use one corresponding to the 2768 * next-hop. (by micchie) 2769 */ 2770 #ifdef INET6 2771 if (stcb && fam == AF_INET6 && 2772 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) { 2773 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro) 2774 == 0) { 2775 continue; 2776 } 2777 } 2778 #endif 2779 #ifdef INET 2780 /* Avoid topologically incorrect IPv4 address */ 2781 if (stcb && fam == AF_INET && 2782 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) { 2783 if (sctp_v4src_match_nexthop(sifa, ro) == 0) { 2784 continue; 2785 } 2786 } 2787 #endif 2788 if (stcb) { 2789 if (sctp_is_address_in_scope(ifa, 2790 stcb->asoc.ipv4_addr_legal, 2791 stcb->asoc.ipv6_addr_legal, 2792 stcb->asoc.loopback_scope, 2793 stcb->asoc.ipv4_local_scope, 2794 stcb->asoc.local_scope, 2795 stcb->asoc.site_scope, 0) == 0) { 2796 continue; 2797 } 2798 if (((non_asoc_addr_ok == 0) && 2799 (sctp_is_addr_restricted(stcb, sifa))) || 2800 (non_asoc_addr_ok && 2801 (sctp_is_addr_restricted(stcb, sifa)) && 2802 (!sctp_is_addr_pending(stcb, sifa)))) { 2803 /* 2804 * It is restricted for some reason.. 2805 * probably not yet added. 2806 */ 2807 continue; 2808 } 2809 } 2810 if (num_eligible_addr >= addr_wanted) { 2811 return (sifa); 2812 } 2813 num_eligible_addr++; 2814 } 2815 return (NULL); 2816 } 2817 2818 2819 static int 2820 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn, 2821 struct sctp_tcb *stcb, 2822 int non_asoc_addr_ok, 2823 uint8_t dest_is_loop, 2824 uint8_t dest_is_priv, 2825 sa_family_t fam) 2826 { 2827 struct sctp_ifa *ifa, *sifa; 2828 int num_eligible_addr = 0; 2829 2830 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { 2831 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2832 (non_asoc_addr_ok == 0)) { 2833 continue; 2834 } 2835 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, 2836 dest_is_priv, fam); 2837 if (sifa == NULL) { 2838 continue; 2839 } 2840 if (stcb) { 2841 if (sctp_is_address_in_scope(ifa, 2842 stcb->asoc.ipv4_addr_legal, 2843 stcb->asoc.ipv6_addr_legal, 2844 stcb->asoc.loopback_scope, 2845 stcb->asoc.ipv4_local_scope, 2846 stcb->asoc.local_scope, 2847 stcb->asoc.site_scope, 0) == 0) { 2848 continue; 2849 } 2850 if (((non_asoc_addr_ok == 0) && 2851 (sctp_is_addr_restricted(stcb, sifa))) || 2852 (non_asoc_addr_ok && 2853 (sctp_is_addr_restricted(stcb, sifa)) && 2854 (!sctp_is_addr_pending(stcb, sifa)))) { 2855 /* 2856 * It is restricted for some reason.. 2857 * probably not yet added. 2858 */ 2859 continue; 2860 } 2861 } 2862 num_eligible_addr++; 2863 } 2864 return (num_eligible_addr); 2865 } 2866 2867 static struct sctp_ifa * 2868 sctp_choose_boundall(struct sctp_inpcb *inp, 2869 struct sctp_tcb *stcb, 2870 struct sctp_nets *net, 2871 sctp_route_t * ro, 2872 uint32_t vrf_id, 2873 uint8_t dest_is_priv, 2874 uint8_t dest_is_loop, 2875 int non_asoc_addr_ok, 2876 sa_family_t fam) 2877 { 2878 int cur_addr_num = 0, num_preferred = 0; 2879 void *ifn; 2880 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn; 2881 struct sctp_ifa *sctp_ifa, *sifa; 2882 uint32_t ifn_index; 2883 struct sctp_vrf *vrf; 2884 2885 #ifdef INET 2886 int retried = 0; 2887 2888 #endif 2889 /*- 2890 * For boundall we can use any address in the association. 2891 * If non_asoc_addr_ok is set we can use any address (at least in 2892 * theory). So we look for preferred addresses first. If we find one, 2893 * we use it. Otherwise we next try to get an address on the 2894 * interface, which we should be able to do (unless non_asoc_addr_ok 2895 * is false and we are routed out that way). In these cases where we 2896 * can't use the address of the interface we go through all the 2897 * ifn's looking for an address we can use and fill that in. Punting 2898 * means we send back address 0, which will probably cause problems 2899 * actually since then IP will fill in the address of the route ifn, 2900 * which means we probably already rejected it.. i.e. here comes an 2901 * abort :-<. 2902 */ 2903 vrf = sctp_find_vrf(vrf_id); 2904 if (vrf == NULL) 2905 return (NULL); 2906 2907 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2908 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2909 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index); 2910 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2911 if (sctp_ifn == NULL) { 2912 /* ?? We don't have this guy ?? */ 2913 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n"); 2914 goto bound_all_plan_b; 2915 } 2916 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n", 2917 ifn_index, sctp_ifn->ifn_name); 2918 2919 if (net) { 2920 cur_addr_num = net->indx_of_eligible_next_to_use; 2921 } 2922 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, 2923 stcb, 2924 non_asoc_addr_ok, 2925 dest_is_loop, 2926 dest_is_priv, fam); 2927 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n", 2928 num_preferred, sctp_ifn->ifn_name); 2929 if (num_preferred == 0) { 2930 /* 2931 * no eligible addresses, we must use some other interface 2932 * address if we can find one. 2933 */ 2934 goto bound_all_plan_b; 2935 } 2936 /* 2937 * Ok we have num_eligible_addr set with how many we can use, this 2938 * may vary from call to call due to addresses being deprecated 2939 * etc.. 2940 */ 2941 if (cur_addr_num >= num_preferred) { 2942 cur_addr_num = 0; 2943 } 2944 /* 2945 * select the nth address from the list (where cur_addr_num is the 2946 * nth) and 0 is the first one, 1 is the second one etc... 2947 */ 2948 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num); 2949 2950 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop, 2951 dest_is_priv, cur_addr_num, fam, ro); 2952 2953 /* if sctp_ifa is NULL something changed??, fall to plan b. */ 2954 if (sctp_ifa) { 2955 atomic_add_int(&sctp_ifa->refcount, 1); 2956 if (net) { 2957 /* save off where the next one we will want */ 2958 net->indx_of_eligible_next_to_use = cur_addr_num + 1; 2959 } 2960 return (sctp_ifa); 2961 } 2962 /* 2963 * plan_b: Look at all interfaces and find a preferred address. If 2964 * no preferred fall through to plan_c. 2965 */ 2966 bound_all_plan_b: 2967 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n"); 2968 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2969 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n", 2970 sctp_ifn->ifn_name); 2971 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2972 /* wrong base scope */ 2973 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n"); 2974 continue; 2975 } 2976 if ((sctp_ifn == looked_at) && looked_at) { 2977 /* already looked at this guy */ 2978 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n"); 2979 continue; 2980 } 2981 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, stcb, non_asoc_addr_ok, 2982 dest_is_loop, dest_is_priv, fam); 2983 SCTPDBG(SCTP_DEBUG_OUTPUT2, 2984 "Found ifn:%p %d preferred source addresses\n", 2985 ifn, num_preferred); 2986 if (num_preferred == 0) { 2987 /* None on this interface. */ 2988 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n"); 2989 continue; 2990 } 2991 SCTPDBG(SCTP_DEBUG_OUTPUT2, 2992 "num preferred:%d on interface:%p cur_addr_num:%d\n", 2993 num_preferred, sctp_ifn, cur_addr_num); 2994 2995 /* 2996 * Ok we have num_eligible_addr set with how many we can 2997 * use, this may vary from call to call due to addresses 2998 * being deprecated etc.. 2999 */ 3000 if (cur_addr_num >= num_preferred) { 3001 cur_addr_num = 0; 3002 } 3003 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop, 3004 dest_is_priv, cur_addr_num, fam, ro); 3005 if (sifa == NULL) 3006 continue; 3007 if (net) { 3008 net->indx_of_eligible_next_to_use = cur_addr_num + 1; 3009 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n", 3010 cur_addr_num); 3011 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:"); 3012 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa); 3013 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:"); 3014 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa); 3015 } 3016 atomic_add_int(&sifa->refcount, 1); 3017 return (sifa); 3018 } 3019 #ifdef INET 3020 again_with_private_addresses_allowed: 3021 #endif 3022 /* plan_c: do we have an acceptable address on the emit interface */ 3023 sifa = NULL; 3024 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n"); 3025 if (emit_ifn == NULL) { 3026 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n"); 3027 goto plan_d; 3028 } 3029 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) { 3030 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", sctp_ifa); 3031 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3032 (non_asoc_addr_ok == 0)) { 3033 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n"); 3034 continue; 3035 } 3036 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, 3037 dest_is_priv, fam); 3038 if (sifa == NULL) { 3039 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n"); 3040 continue; 3041 } 3042 if (stcb) { 3043 if (sctp_is_address_in_scope(sifa, 3044 stcb->asoc.ipv4_addr_legal, 3045 stcb->asoc.ipv6_addr_legal, 3046 stcb->asoc.loopback_scope, 3047 stcb->asoc.ipv4_local_scope, 3048 stcb->asoc.local_scope, 3049 stcb->asoc.site_scope, 0) == 0) { 3050 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n"); 3051 sifa = NULL; 3052 continue; 3053 } 3054 if (((non_asoc_addr_ok == 0) && 3055 (sctp_is_addr_restricted(stcb, sifa))) || 3056 (non_asoc_addr_ok && 3057 (sctp_is_addr_restricted(stcb, sifa)) && 3058 (!sctp_is_addr_pending(stcb, sifa)))) { 3059 /* 3060 * It is restricted for some reason.. 3061 * probably not yet added. 3062 */ 3063 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n"); 3064 sifa = NULL; 3065 continue; 3066 } 3067 } else { 3068 printf("Stcb is null - no print\n"); 3069 } 3070 atomic_add_int(&sifa->refcount, 1); 3071 goto out; 3072 } 3073 plan_d: 3074 /* 3075 * plan_d: We are in trouble. No preferred address on the emit 3076 * interface. And not even a preferred address on all interfaces. Go 3077 * out and see if we can find an acceptable address somewhere 3078 * amongst all interfaces. 3079 */ 3080 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", looked_at); 3081 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3082 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3083 /* wrong base scope */ 3084 continue; 3085 } 3086 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3087 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3088 (non_asoc_addr_ok == 0)) 3089 continue; 3090 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, 3091 dest_is_loop, 3092 dest_is_priv, fam); 3093 if (sifa == NULL) 3094 continue; 3095 if (stcb) { 3096 if (sctp_is_address_in_scope(sifa, 3097 stcb->asoc.ipv4_addr_legal, 3098 stcb->asoc.ipv6_addr_legal, 3099 stcb->asoc.loopback_scope, 3100 stcb->asoc.ipv4_local_scope, 3101 stcb->asoc.local_scope, 3102 stcb->asoc.site_scope, 0) == 0) { 3103 sifa = NULL; 3104 continue; 3105 } 3106 if (((non_asoc_addr_ok == 0) && 3107 (sctp_is_addr_restricted(stcb, sifa))) || 3108 (non_asoc_addr_ok && 3109 (sctp_is_addr_restricted(stcb, sifa)) && 3110 (!sctp_is_addr_pending(stcb, sifa)))) { 3111 /* 3112 * It is restricted for some 3113 * reason.. probably not yet added. 3114 */ 3115 sifa = NULL; 3116 continue; 3117 } 3118 } 3119 goto out; 3120 } 3121 } 3122 #ifdef INET 3123 if ((retried == 0) && (stcb->asoc.ipv4_local_scope == 0)) { 3124 stcb->asoc.ipv4_local_scope = 1; 3125 retried = 1; 3126 goto again_with_private_addresses_allowed; 3127 } else if (retried == 1) { 3128 stcb->asoc.ipv4_local_scope = 0; 3129 } 3130 #endif 3131 out: 3132 #ifdef INET 3133 if (sifa) { 3134 if (retried == 1) { 3135 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3136 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3137 /* wrong base scope */ 3138 continue; 3139 } 3140 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3141 struct sctp_ifa *tmp_sifa; 3142 3143 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3144 (non_asoc_addr_ok == 0)) 3145 continue; 3146 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, 3147 dest_is_loop, 3148 dest_is_priv, fam); 3149 if (tmp_sifa == NULL) { 3150 continue; 3151 } 3152 if (tmp_sifa == sifa) { 3153 continue; 3154 } 3155 if (stcb) { 3156 if (sctp_is_address_in_scope(tmp_sifa, 3157 stcb->asoc.ipv4_addr_legal, 3158 stcb->asoc.ipv6_addr_legal, 3159 stcb->asoc.loopback_scope, 3160 stcb->asoc.ipv4_local_scope, 3161 stcb->asoc.local_scope, 3162 stcb->asoc.site_scope, 0) == 0) { 3163 continue; 3164 } 3165 if (((non_asoc_addr_ok == 0) && 3166 (sctp_is_addr_restricted(stcb, tmp_sifa))) || 3167 (non_asoc_addr_ok && 3168 (sctp_is_addr_restricted(stcb, tmp_sifa)) && 3169 (!sctp_is_addr_pending(stcb, tmp_sifa)))) { 3170 /* 3171 * It is restricted 3172 * for some reason.. 3173 * probably not yet 3174 * added. 3175 */ 3176 continue; 3177 } 3178 } 3179 if ((tmp_sifa->address.sin.sin_family == AF_INET) && 3180 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) { 3181 sctp_add_local_addr_restricted(stcb, tmp_sifa); 3182 } 3183 } 3184 } 3185 } 3186 atomic_add_int(&sifa->refcount, 1); 3187 } 3188 #endif 3189 return (sifa); 3190 } 3191 3192 3193 3194 /* tcb may be NULL */ 3195 struct sctp_ifa * 3196 sctp_source_address_selection(struct sctp_inpcb *inp, 3197 struct sctp_tcb *stcb, 3198 sctp_route_t * ro, 3199 struct sctp_nets *net, 3200 int non_asoc_addr_ok, uint32_t vrf_id) 3201 { 3202 struct sctp_ifa *answer; 3203 uint8_t dest_is_priv, dest_is_loop; 3204 sa_family_t fam; 3205 3206 #ifdef INET 3207 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst; 3208 3209 #endif 3210 #ifdef INET6 3211 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst; 3212 3213 #endif 3214 3215 /** 3216 * Rules: - Find the route if needed, cache if I can. - Look at 3217 * interface address in route, Is it in the bound list. If so we 3218 * have the best source. - If not we must rotate amongst the 3219 * addresses. 3220 * 3221 * Cavets and issues 3222 * 3223 * Do we need to pay attention to scope. We can have a private address 3224 * or a global address we are sourcing or sending to. So if we draw 3225 * it out 3226 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3227 * For V4 3228 * ------------------------------------------ 3229 * source * dest * result 3230 * ----------------------------------------- 3231 * <a> Private * Global * NAT 3232 * ----------------------------------------- 3233 * <b> Private * Private * No problem 3234 * ----------------------------------------- 3235 * <c> Global * Private * Huh, How will this work? 3236 * ----------------------------------------- 3237 * <d> Global * Global * No Problem 3238 *------------------------------------------ 3239 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3240 * For V6 3241 *------------------------------------------ 3242 * source * dest * result 3243 * ----------------------------------------- 3244 * <a> Linklocal * Global * 3245 * ----------------------------------------- 3246 * <b> Linklocal * Linklocal * No problem 3247 * ----------------------------------------- 3248 * <c> Global * Linklocal * Huh, How will this work? 3249 * ----------------------------------------- 3250 * <d> Global * Global * No Problem 3251 *------------------------------------------ 3252 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3253 * 3254 * And then we add to that what happens if there are multiple addresses 3255 * assigned to an interface. Remember the ifa on a ifn is a linked 3256 * list of addresses. So one interface can have more than one IP 3257 * address. What happens if we have both a private and a global 3258 * address? Do we then use context of destination to sort out which 3259 * one is best? And what about NAT's sending P->G may get you a NAT 3260 * translation, or should you select the G thats on the interface in 3261 * preference. 3262 * 3263 * Decisions: 3264 * 3265 * - count the number of addresses on the interface. 3266 * - if it is one, no problem except case <c>. 3267 * For <a> we will assume a NAT out there. 3268 * - if there are more than one, then we need to worry about scope P 3269 * or G. We should prefer G -> G and P -> P if possible. 3270 * Then as a secondary fall back to mixed types G->P being a last 3271 * ditch one. 3272 * - The above all works for bound all, but bound specific we need to 3273 * use the same concept but instead only consider the bound 3274 * addresses. If the bound set is NOT assigned to the interface then 3275 * we must use rotation amongst the bound addresses.. 3276 */ 3277 if (ro->ro_rt == NULL) { 3278 /* 3279 * Need a route to cache. 3280 */ 3281 SCTP_RTALLOC(ro, vrf_id); 3282 } 3283 if (ro->ro_rt == NULL) { 3284 return (NULL); 3285 } 3286 fam = ro->ro_dst.sa_family; 3287 dest_is_priv = dest_is_loop = 0; 3288 /* Setup our scopes for the destination */ 3289 switch (fam) { 3290 #ifdef INET 3291 case AF_INET: 3292 /* Scope based on outbound address */ 3293 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3294 dest_is_loop = 1; 3295 if (net != NULL) { 3296 /* mark it as local */ 3297 net->addr_is_local = 1; 3298 } 3299 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) { 3300 dest_is_priv = 1; 3301 } 3302 break; 3303 #endif 3304 #ifdef INET6 3305 case AF_INET6: 3306 /* Scope based on outbound address */ 3307 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) || 3308 SCTP_ROUTE_IS_REAL_LOOP(ro)) { 3309 /* 3310 * If the address is a loopback address, which 3311 * consists of "::1" OR "fe80::1%lo0", we are 3312 * loopback scope. But we don't use dest_is_priv 3313 * (link local addresses). 3314 */ 3315 dest_is_loop = 1; 3316 if (net != NULL) { 3317 /* mark it as local */ 3318 net->addr_is_local = 1; 3319 } 3320 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3321 dest_is_priv = 1; 3322 } 3323 break; 3324 #endif 3325 } 3326 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:"); 3327 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst); 3328 SCTP_IPI_ADDR_RLOCK(); 3329 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3330 /* 3331 * Bound all case 3332 */ 3333 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id, 3334 dest_is_priv, dest_is_loop, 3335 non_asoc_addr_ok, fam); 3336 SCTP_IPI_ADDR_RUNLOCK(); 3337 return (answer); 3338 } 3339 /* 3340 * Subset bound case 3341 */ 3342 if (stcb) { 3343 answer = sctp_choose_boundspecific_stcb(inp, stcb, net, ro, 3344 vrf_id, dest_is_priv, 3345 dest_is_loop, 3346 non_asoc_addr_ok, fam); 3347 } else { 3348 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id, 3349 non_asoc_addr_ok, 3350 dest_is_priv, 3351 dest_is_loop, fam); 3352 } 3353 SCTP_IPI_ADDR_RUNLOCK(); 3354 return (answer); 3355 } 3356 3357 static int 3358 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize) 3359 { 3360 struct cmsghdr cmh; 3361 int tlen, at, found; 3362 struct sctp_sndinfo sndinfo; 3363 struct sctp_prinfo prinfo; 3364 struct sctp_authinfo authinfo; 3365 3366 tlen = SCTP_BUF_LEN(control); 3367 at = 0; 3368 found = 0; 3369 /* 3370 * Independent of how many mbufs, find the c_type inside the control 3371 * structure and copy out the data. 3372 */ 3373 while (at < tlen) { 3374 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3375 /* There is not enough room for one more. */ 3376 return (found); 3377 } 3378 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3379 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) { 3380 /* We dont't have a complete CMSG header. */ 3381 return (found); 3382 } 3383 if (((int)cmh.cmsg_len + at) > tlen) { 3384 /* We don't have the complete CMSG. */ 3385 return (found); 3386 } 3387 if ((cmh.cmsg_level == IPPROTO_SCTP) && 3388 ((c_type == cmh.cmsg_type) || 3389 ((c_type == SCTP_SNDRCV) && 3390 ((cmh.cmsg_type == SCTP_SNDINFO) || 3391 (cmh.cmsg_type == SCTP_PRINFO) || 3392 (cmh.cmsg_type == SCTP_AUTHINFO))))) { 3393 if (c_type == cmh.cmsg_type) { 3394 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < cpsize) { 3395 return (found); 3396 } 3397 /* It is exactly what we want. Copy it out. */ 3398 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), cpsize, (caddr_t)data); 3399 return (1); 3400 } else { 3401 struct sctp_sndrcvinfo *sndrcvinfo; 3402 3403 sndrcvinfo = (struct sctp_sndrcvinfo *)data; 3404 if (found == 0) { 3405 if (cpsize < sizeof(struct sctp_sndrcvinfo)) { 3406 return (found); 3407 } 3408 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo)); 3409 } 3410 switch (cmh.cmsg_type) { 3411 case SCTP_SNDINFO: 3412 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_sndinfo)) { 3413 return (found); 3414 } 3415 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo); 3416 sndrcvinfo->sinfo_stream = sndinfo.snd_sid; 3417 sndrcvinfo->sinfo_flags = sndinfo.snd_flags; 3418 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid; 3419 sndrcvinfo->sinfo_context = sndinfo.snd_context; 3420 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id; 3421 break; 3422 case SCTP_PRINFO: 3423 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_prinfo)) { 3424 return (found); 3425 } 3426 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo); 3427 sndrcvinfo->sinfo_timetolive = prinfo.pr_value; 3428 sndrcvinfo->sinfo_flags |= prinfo.pr_policy; 3429 break; 3430 case SCTP_AUTHINFO: 3431 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_authinfo)) { 3432 return (found); 3433 } 3434 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo); 3435 sndrcvinfo->sinfo_keynumber_valid = 1; 3436 sndrcvinfo->sinfo_keynumber = authinfo.auth_keyid; 3437 break; 3438 default: 3439 return (found); 3440 } 3441 found = 1; 3442 } 3443 } 3444 at += CMSG_ALIGN(cmh.cmsg_len); 3445 } 3446 return (found); 3447 } 3448 3449 static int 3450 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error) 3451 { 3452 struct cmsghdr cmh; 3453 int tlen, at; 3454 struct sctp_initmsg initmsg; 3455 3456 #ifdef INET 3457 struct sockaddr_in sin; 3458 3459 #endif 3460 #ifdef INET6 3461 struct sockaddr_in6 sin6; 3462 3463 #endif 3464 3465 tlen = SCTP_BUF_LEN(control); 3466 at = 0; 3467 while (at < tlen) { 3468 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3469 /* There is not enough room for one more. */ 3470 *error = EINVAL; 3471 return (1); 3472 } 3473 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3474 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) { 3475 /* We dont't have a complete CMSG header. */ 3476 *error = EINVAL; 3477 return (1); 3478 } 3479 if (((int)cmh.cmsg_len + at) > tlen) { 3480 /* We don't have the complete CMSG. */ 3481 *error = EINVAL; 3482 return (1); 3483 } 3484 if (cmh.cmsg_level == IPPROTO_SCTP) { 3485 switch (cmh.cmsg_type) { 3486 case SCTP_INIT: 3487 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_initmsg)) { 3488 *error = EINVAL; 3489 return (1); 3490 } 3491 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg); 3492 if (initmsg.sinit_max_attempts) 3493 stcb->asoc.max_init_times = initmsg.sinit_max_attempts; 3494 if (initmsg.sinit_num_ostreams) 3495 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams; 3496 if (initmsg.sinit_max_instreams) 3497 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams; 3498 if (initmsg.sinit_max_init_timeo) 3499 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo; 3500 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) { 3501 struct sctp_stream_out *tmp_str; 3502 unsigned int i; 3503 3504 /* Default is NOT correct */ 3505 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n", 3506 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams); 3507 SCTP_TCB_UNLOCK(stcb); 3508 SCTP_MALLOC(tmp_str, 3509 struct sctp_stream_out *, 3510 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)), 3511 SCTP_M_STRMO); 3512 SCTP_TCB_LOCK(stcb); 3513 if (tmp_str != NULL) { 3514 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO); 3515 stcb->asoc.strmout = tmp_str; 3516 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams; 3517 } else { 3518 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt; 3519 } 3520 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 3521 stcb->asoc.strmout[i].next_sequence_sent = 0; 3522 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 3523 stcb->asoc.strmout[i].stream_no = i; 3524 stcb->asoc.strmout[i].last_msg_incomplete = 0; 3525 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL); 3526 } 3527 } 3528 break; 3529 #ifdef INET 3530 case SCTP_DSTADDRV4: 3531 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in_addr)) { 3532 *error = EINVAL; 3533 return (1); 3534 } 3535 memset(&sin, 0, sizeof(struct sockaddr_in)); 3536 sin.sin_family = AF_INET; 3537 sin.sin_len = sizeof(struct sockaddr_in); 3538 sin.sin_port = stcb->rport; 3539 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr); 3540 if ((sin.sin_addr.s_addr == INADDR_ANY) || 3541 (sin.sin_addr.s_addr == INADDR_BROADCAST) || 3542 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 3543 *error = EINVAL; 3544 return (1); 3545 } 3546 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, 3547 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3548 *error = ENOBUFS; 3549 return (1); 3550 } 3551 break; 3552 #endif 3553 #ifdef INET6 3554 case SCTP_DSTADDRV6: 3555 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in6_addr)) { 3556 *error = EINVAL; 3557 return (1); 3558 } 3559 memset(&sin6, 0, sizeof(struct sockaddr_in6)); 3560 sin6.sin6_family = AF_INET6; 3561 sin6.sin6_len = sizeof(struct sockaddr_in6); 3562 sin6.sin6_port = stcb->rport; 3563 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr); 3564 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) || 3565 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 3566 *error = EINVAL; 3567 return (1); 3568 } 3569 #ifdef INET 3570 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) { 3571 in6_sin6_2_sin(&sin, &sin6); 3572 if ((sin.sin_addr.s_addr == INADDR_ANY) || 3573 (sin.sin_addr.s_addr == INADDR_BROADCAST) || 3574 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 3575 *error = EINVAL; 3576 return (1); 3577 } 3578 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, 3579 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3580 *error = ENOBUFS; 3581 return (1); 3582 } 3583 } else 3584 #endif 3585 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, 3586 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3587 *error = ENOBUFS; 3588 return (1); 3589 } 3590 break; 3591 #endif 3592 default: 3593 break; 3594 } 3595 } 3596 at += CMSG_ALIGN(cmh.cmsg_len); 3597 } 3598 return (0); 3599 } 3600 3601 static struct sctp_tcb * 3602 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p, 3603 in_port_t port, 3604 struct mbuf *control, 3605 struct sctp_nets **net_p, 3606 int *error) 3607 { 3608 struct cmsghdr cmh; 3609 int tlen, at; 3610 struct sctp_tcb *stcb; 3611 struct sockaddr *addr; 3612 3613 #ifdef INET 3614 struct sockaddr_in sin; 3615 3616 #endif 3617 #ifdef INET6 3618 struct sockaddr_in6 sin6; 3619 3620 #endif 3621 3622 tlen = SCTP_BUF_LEN(control); 3623 at = 0; 3624 while (at < tlen) { 3625 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3626 /* There is not enough room for one more. */ 3627 *error = EINVAL; 3628 return (NULL); 3629 } 3630 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3631 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) { 3632 /* We dont't have a complete CMSG header. */ 3633 *error = EINVAL; 3634 return (NULL); 3635 } 3636 if (((int)cmh.cmsg_len + at) > tlen) { 3637 /* We don't have the complete CMSG. */ 3638 *error = EINVAL; 3639 return (NULL); 3640 } 3641 if (cmh.cmsg_level == IPPROTO_SCTP) { 3642 switch (cmh.cmsg_type) { 3643 #ifdef INET 3644 case SCTP_DSTADDRV4: 3645 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in_addr)) { 3646 *error = EINVAL; 3647 return (NULL); 3648 } 3649 memset(&sin, 0, sizeof(struct sockaddr_in)); 3650 sin.sin_family = AF_INET; 3651 sin.sin_len = sizeof(struct sockaddr_in); 3652 sin.sin_port = port; 3653 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr); 3654 addr = (struct sockaddr *)&sin; 3655 break; 3656 #endif 3657 #ifdef INET6 3658 case SCTP_DSTADDRV6: 3659 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in6_addr)) { 3660 *error = EINVAL; 3661 return (NULL); 3662 } 3663 memset(&sin6, 0, sizeof(struct sockaddr_in6)); 3664 sin6.sin6_family = AF_INET6; 3665 sin6.sin6_len = sizeof(struct sockaddr_in6); 3666 sin6.sin6_port = port; 3667 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr); 3668 #ifdef INET 3669 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) { 3670 in6_sin6_2_sin(&sin, &sin6); 3671 addr = (struct sockaddr *)&sin; 3672 } else 3673 #endif 3674 addr = (struct sockaddr *)&sin6; 3675 break; 3676 #endif 3677 default: 3678 addr = NULL; 3679 break; 3680 } 3681 if (addr) { 3682 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL); 3683 if (stcb != NULL) { 3684 return (stcb); 3685 } 3686 } 3687 } 3688 at += CMSG_ALIGN(cmh.cmsg_len); 3689 } 3690 return (NULL); 3691 } 3692 3693 static struct mbuf * 3694 sctp_add_cookie(struct sctp_inpcb *inp, struct mbuf *init, int init_offset, 3695 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature) 3696 { 3697 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret; 3698 struct sctp_state_cookie *stc; 3699 struct sctp_paramhdr *ph; 3700 uint8_t *foo; 3701 int sig_offset; 3702 uint16_t cookie_sz; 3703 3704 mret = NULL; 3705 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) + 3706 sizeof(struct sctp_paramhdr)), 0, 3707 M_DONTWAIT, 1, MT_DATA); 3708 if (mret == NULL) { 3709 return (NULL); 3710 } 3711 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_DONTWAIT); 3712 if (copy_init == NULL) { 3713 sctp_m_freem(mret); 3714 return (NULL); 3715 } 3716 #ifdef SCTP_MBUF_LOGGING 3717 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 3718 struct mbuf *mat; 3719 3720 mat = copy_init; 3721 while (mat) { 3722 if (SCTP_BUF_IS_EXTENDED(mat)) { 3723 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 3724 } 3725 mat = SCTP_BUF_NEXT(mat); 3726 } 3727 } 3728 #endif 3729 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL, 3730 M_DONTWAIT); 3731 if (copy_initack == NULL) { 3732 sctp_m_freem(mret); 3733 sctp_m_freem(copy_init); 3734 return (NULL); 3735 } 3736 #ifdef SCTP_MBUF_LOGGING 3737 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 3738 struct mbuf *mat; 3739 3740 mat = copy_initack; 3741 while (mat) { 3742 if (SCTP_BUF_IS_EXTENDED(mat)) { 3743 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 3744 } 3745 mat = SCTP_BUF_NEXT(mat); 3746 } 3747 } 3748 #endif 3749 /* easy side we just drop it on the end */ 3750 ph = mtod(mret, struct sctp_paramhdr *); 3751 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) + 3752 sizeof(struct sctp_paramhdr); 3753 stc = (struct sctp_state_cookie *)((caddr_t)ph + 3754 sizeof(struct sctp_paramhdr)); 3755 ph->param_type = htons(SCTP_STATE_COOKIE); 3756 ph->param_length = 0; /* fill in at the end */ 3757 /* Fill in the stc cookie data */ 3758 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie)); 3759 3760 /* tack the INIT and then the INIT-ACK onto the chain */ 3761 cookie_sz = 0; 3762 m_at = mret; 3763 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3764 cookie_sz += SCTP_BUF_LEN(m_at); 3765 if (SCTP_BUF_NEXT(m_at) == NULL) { 3766 SCTP_BUF_NEXT(m_at) = copy_init; 3767 break; 3768 } 3769 } 3770 3771 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3772 cookie_sz += SCTP_BUF_LEN(m_at); 3773 if (SCTP_BUF_NEXT(m_at) == NULL) { 3774 SCTP_BUF_NEXT(m_at) = copy_initack; 3775 break; 3776 } 3777 } 3778 3779 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3780 cookie_sz += SCTP_BUF_LEN(m_at); 3781 if (SCTP_BUF_NEXT(m_at) == NULL) { 3782 break; 3783 } 3784 } 3785 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_DONTWAIT, 1, MT_DATA); 3786 if (sig == NULL) { 3787 /* no space, so free the entire chain */ 3788 sctp_m_freem(mret); 3789 return (NULL); 3790 } 3791 SCTP_BUF_LEN(sig) = 0; 3792 SCTP_BUF_NEXT(m_at) = sig; 3793 sig_offset = 0; 3794 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset); 3795 memset(foo, 0, SCTP_SIGNATURE_SIZE); 3796 *signature = foo; 3797 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE; 3798 cookie_sz += SCTP_SIGNATURE_SIZE; 3799 ph->param_length = htons(cookie_sz); 3800 return (mret); 3801 } 3802 3803 3804 static uint8_t 3805 sctp_get_ect(struct sctp_tcb *stcb, 3806 struct sctp_tmit_chunk *chk) 3807 { 3808 if ((stcb != NULL) && (stcb->asoc.ecn_allowed == 1)) { 3809 return (SCTP_ECT0_BIT); 3810 } else { 3811 return (0); 3812 } 3813 } 3814 3815 static void 3816 sctp_handle_no_route(struct sctp_tcb *stcb, 3817 struct sctp_nets *net, 3818 int so_locked) 3819 { 3820 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n"); 3821 3822 if (net) { 3823 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was "); 3824 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa); 3825 if (net->dest_state & SCTP_ADDR_CONFIRMED) { 3826 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) { 3827 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", net); 3828 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 3829 stcb, 3830 SCTP_FAILED_THRESHOLD, 3831 (void *)net, 3832 so_locked); 3833 net->dest_state &= ~SCTP_ADDR_REACHABLE; 3834 net->dest_state &= ~SCTP_ADDR_PF; 3835 } 3836 } 3837 if (stcb) { 3838 if (net == stcb->asoc.primary_destination) { 3839 /* need a new primary */ 3840 struct sctp_nets *alt; 3841 3842 alt = sctp_find_alternate_net(stcb, net, 0); 3843 if (alt != net) { 3844 if (stcb->asoc.alternate) { 3845 sctp_free_remote_addr(stcb->asoc.alternate); 3846 } 3847 stcb->asoc.alternate = alt; 3848 atomic_add_int(&stcb->asoc.alternate->ref_count, 1); 3849 if (net->ro._s_addr) { 3850 sctp_free_ifa(net->ro._s_addr); 3851 net->ro._s_addr = NULL; 3852 } 3853 net->src_addr_selected = 0; 3854 } 3855 } 3856 } 3857 } 3858 } 3859 3860 static int 3861 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp, 3862 struct sctp_tcb *stcb, /* may be NULL */ 3863 struct sctp_nets *net, 3864 struct sockaddr *to, 3865 struct mbuf *m, 3866 uint32_t auth_offset, 3867 struct sctp_auth_chunk *auth, 3868 uint16_t auth_keyid, 3869 int nofragment_flag, 3870 int ecn_ok, 3871 struct sctp_tmit_chunk *chk, 3872 int out_of_asoc_ok, 3873 uint16_t src_port, 3874 uint16_t dest_port, 3875 uint32_t v_tag, 3876 uint16_t port, 3877 int so_locked, 3878 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 3879 SCTP_UNUSED 3880 #endif 3881 union sctp_sockstore *over_addr, 3882 struct mbuf *init 3883 ) 3884 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */ 3885 { 3886 /** 3887 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header 3888 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure: 3889 * - fill in the HMAC digest of any AUTH chunk in the packet. 3890 * - calculate and fill in the SCTP checksum. 3891 * - prepend an IP address header. 3892 * - if boundall use INADDR_ANY. 3893 * - if boundspecific do source address selection. 3894 * - set fragmentation option for ipV4. 3895 * - On return from IP output, check/adjust mtu size of output 3896 * interface and smallest_mtu size as well. 3897 */ 3898 /* Will need ifdefs around this */ 3899 struct mbuf *o_pak; 3900 struct mbuf *newm; 3901 struct sctphdr *sctphdr; 3902 int packet_length; 3903 int ret; 3904 uint32_t vrf_id; 3905 sctp_route_t *ro = NULL; 3906 struct udphdr *udp = NULL; 3907 uint8_t tos_value; 3908 3909 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 3910 struct socket *so = NULL; 3911 3912 #endif 3913 3914 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) { 3915 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 3916 sctp_m_freem(m); 3917 return (EFAULT); 3918 } 3919 if (stcb) { 3920 vrf_id = stcb->asoc.vrf_id; 3921 } else { 3922 vrf_id = inp->def_vrf_id; 3923 } 3924 3925 /* fill in the HMAC digest for any AUTH chunk in the packet */ 3926 if ((auth != NULL) && (stcb != NULL)) { 3927 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid); 3928 } 3929 if (net) { 3930 tos_value = net->dscp; 3931 } else if (stcb) { 3932 tos_value = stcb->asoc.default_dscp; 3933 } else { 3934 tos_value = inp->sctp_ep.default_dscp; 3935 } 3936 3937 switch (to->sa_family) { 3938 #ifdef INET 3939 case AF_INET: 3940 { 3941 struct ip *ip = NULL; 3942 sctp_route_t iproute; 3943 int len; 3944 3945 len = sizeof(struct ip) + sizeof(struct sctphdr); 3946 if (port) { 3947 len += sizeof(struct udphdr); 3948 } 3949 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA); 3950 if (newm == NULL) { 3951 sctp_m_freem(m); 3952 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 3953 return (ENOMEM); 3954 } 3955 SCTP_ALIGN_TO_END(newm, len); 3956 SCTP_BUF_LEN(newm) = len; 3957 SCTP_BUF_NEXT(newm) = m; 3958 m = newm; 3959 if (net != NULL) { 3960 #ifdef INVARIANTS 3961 if (net->flowidset == 0) { 3962 panic("Flow ID not set"); 3963 } 3964 #endif 3965 m->m_pkthdr.flowid = net->flowid; 3966 m->m_flags |= M_FLOWID; 3967 } else { 3968 if ((init != NULL) && (init->m_flags & M_FLOWID)) { 3969 m->m_pkthdr.flowid = init->m_pkthdr.flowid; 3970 m->m_flags |= M_FLOWID; 3971 } 3972 } 3973 packet_length = sctp_calculate_len(m); 3974 ip = mtod(m, struct ip *); 3975 ip->ip_v = IPVERSION; 3976 ip->ip_hl = (sizeof(struct ip) >> 2); 3977 if (tos_value == 0) { 3978 /* 3979 * This means especially, that it is not set 3980 * at the SCTP layer. So use the value from 3981 * the IP layer. 3982 */ 3983 tos_value = inp->ip_inp.inp.inp_ip_tos; 3984 } 3985 tos_value &= 0xfc; 3986 if (ecn_ok) { 3987 tos_value |= sctp_get_ect(stcb, chk); 3988 } 3989 if ((nofragment_flag) && (port == 0)) { 3990 ip->ip_off = IP_DF; 3991 } else 3992 ip->ip_off = 0; 3993 3994 /* FreeBSD has a function for ip_id's */ 3995 ip->ip_id = ip_newid(); 3996 3997 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl; 3998 ip->ip_len = packet_length; 3999 ip->ip_tos = tos_value; 4000 if (port) { 4001 ip->ip_p = IPPROTO_UDP; 4002 } else { 4003 ip->ip_p = IPPROTO_SCTP; 4004 } 4005 ip->ip_sum = 0; 4006 if (net == NULL) { 4007 ro = &iproute; 4008 memset(&iproute, 0, sizeof(iproute)); 4009 memcpy(&ro->ro_dst, to, to->sa_len); 4010 } else { 4011 ro = (sctp_route_t *) & net->ro; 4012 } 4013 /* Now the address selection part */ 4014 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr; 4015 4016 /* call the routine to select the src address */ 4017 if (net && out_of_asoc_ok == 0) { 4018 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) { 4019 sctp_free_ifa(net->ro._s_addr); 4020 net->ro._s_addr = NULL; 4021 net->src_addr_selected = 0; 4022 if (ro->ro_rt) { 4023 RTFREE(ro->ro_rt); 4024 ro->ro_rt = NULL; 4025 } 4026 } 4027 if (net->src_addr_selected == 0) { 4028 /* Cache the source address */ 4029 net->ro._s_addr = sctp_source_address_selection(inp, stcb, 4030 ro, net, 0, 4031 vrf_id); 4032 net->src_addr_selected = 1; 4033 } 4034 if (net->ro._s_addr == NULL) { 4035 /* No route to host */ 4036 net->src_addr_selected = 0; 4037 sctp_handle_no_route(stcb, net, so_locked); 4038 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4039 sctp_m_freem(m); 4040 return (EHOSTUNREACH); 4041 } 4042 ip->ip_src = net->ro._s_addr->address.sin.sin_addr; 4043 } else { 4044 if (over_addr == NULL) { 4045 struct sctp_ifa *_lsrc; 4046 4047 _lsrc = sctp_source_address_selection(inp, stcb, ro, 4048 net, 4049 out_of_asoc_ok, 4050 vrf_id); 4051 if (_lsrc == NULL) { 4052 sctp_handle_no_route(stcb, net, so_locked); 4053 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4054 sctp_m_freem(m); 4055 return (EHOSTUNREACH); 4056 } 4057 ip->ip_src = _lsrc->address.sin.sin_addr; 4058 sctp_free_ifa(_lsrc); 4059 } else { 4060 ip->ip_src = over_addr->sin.sin_addr; 4061 SCTP_RTALLOC(ro, vrf_id); 4062 } 4063 } 4064 if (port) { 4065 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip)); 4066 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4067 udp->uh_dport = port; 4068 udp->uh_ulen = htons(packet_length - sizeof(struct ip)); 4069 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 4070 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); 4071 } else { 4072 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip)); 4073 } 4074 4075 sctphdr->src_port = src_port; 4076 sctphdr->dest_port = dest_port; 4077 sctphdr->v_tag = v_tag; 4078 sctphdr->checksum = 0; 4079 4080 /* 4081 * If source address selection fails and we find no 4082 * route then the ip_output should fail as well with 4083 * a NO_ROUTE_TO_HOST type error. We probably should 4084 * catch that somewhere and abort the association 4085 * right away (assuming this is an INIT being sent). 4086 */ 4087 if (ro->ro_rt == NULL) { 4088 /* 4089 * src addr selection failed to find a route 4090 * (or valid source addr), so we can't get 4091 * there from here (yet)! 4092 */ 4093 sctp_handle_no_route(stcb, net, so_locked); 4094 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4095 sctp_m_freem(m); 4096 return (EHOSTUNREACH); 4097 } 4098 if (ro != &iproute) { 4099 memcpy(&iproute, ro, sizeof(*ro)); 4100 } 4101 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n", 4102 (uint32_t) (ntohl(ip->ip_src.s_addr))); 4103 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n", 4104 (uint32_t) (ntohl(ip->ip_dst.s_addr))); 4105 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n", 4106 ro->ro_rt); 4107 4108 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 4109 /* failed to prepend data, give up */ 4110 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4111 sctp_m_freem(m); 4112 return (ENOMEM); 4113 } 4114 #ifdef SCTP_PACKET_LOGGING 4115 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 4116 sctp_packet_log(m, packet_length); 4117 #endif 4118 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 4119 if (port) { 4120 #if defined(SCTP_WITH_NO_CSUM) 4121 SCTP_STAT_INCR(sctps_sendnocrc); 4122 #else 4123 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) && 4124 (stcb) && 4125 (stcb->asoc.loopback_scope))) { 4126 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr)); 4127 SCTP_STAT_INCR(sctps_sendswcrc); 4128 } else { 4129 SCTP_STAT_INCR(sctps_sendnocrc); 4130 } 4131 #endif 4132 SCTP_ENABLE_UDP_CSUM(o_pak); 4133 } else { 4134 #if defined(SCTP_WITH_NO_CSUM) 4135 SCTP_STAT_INCR(sctps_sendnocrc); 4136 #else 4137 m->m_pkthdr.csum_flags = CSUM_SCTP; 4138 m->m_pkthdr.csum_data = 0; 4139 SCTP_STAT_INCR(sctps_sendhwcrc); 4140 #endif 4141 } 4142 /* send it out. table id is taken from stcb */ 4143 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4144 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4145 so = SCTP_INP_SO(inp); 4146 SCTP_SOCKET_UNLOCK(so, 0); 4147 } 4148 #endif 4149 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id); 4150 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4151 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4152 atomic_add_int(&stcb->asoc.refcnt, 1); 4153 SCTP_TCB_UNLOCK(stcb); 4154 SCTP_SOCKET_LOCK(so, 0); 4155 SCTP_TCB_LOCK(stcb); 4156 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4157 } 4158 #endif 4159 SCTP_STAT_INCR(sctps_sendpackets); 4160 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 4161 if (ret) 4162 SCTP_STAT_INCR(sctps_senderrors); 4163 4164 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret); 4165 if (net == NULL) { 4166 /* free tempy routes */ 4167 if (ro->ro_rt) { 4168 RTFREE(ro->ro_rt); 4169 ro->ro_rt = NULL; 4170 } 4171 } else { 4172 /* 4173 * PMTU check versus smallest asoc MTU goes 4174 * here 4175 */ 4176 if ((ro->ro_rt != NULL) && 4177 (net->ro._s_addr)) { 4178 uint32_t mtu; 4179 4180 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); 4181 if (net->port) { 4182 mtu -= sizeof(struct udphdr); 4183 } 4184 if (mtu && (stcb->asoc.smallest_mtu > mtu)) { 4185 sctp_mtu_size_reset(inp, &stcb->asoc, mtu); 4186 net->mtu = mtu; 4187 } 4188 } else if (ro->ro_rt == NULL) { 4189 /* route was freed */ 4190 if (net->ro._s_addr && 4191 net->src_addr_selected) { 4192 sctp_free_ifa(net->ro._s_addr); 4193 net->ro._s_addr = NULL; 4194 } 4195 net->src_addr_selected = 0; 4196 } 4197 } 4198 return (ret); 4199 } 4200 #endif 4201 #ifdef INET6 4202 case AF_INET6: 4203 { 4204 uint32_t flowlabel, flowinfo; 4205 struct ip6_hdr *ip6h; 4206 struct route_in6 ip6route; 4207 struct ifnet *ifp; 4208 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp; 4209 int prev_scope = 0; 4210 struct sockaddr_in6 lsa6_storage; 4211 int error; 4212 u_short prev_port = 0; 4213 int len; 4214 4215 if (net) { 4216 flowlabel = net->flowlabel; 4217 } else if (stcb) { 4218 flowlabel = stcb->asoc.default_flowlabel; 4219 } else { 4220 flowlabel = inp->sctp_ep.default_flowlabel; 4221 } 4222 if (flowlabel == 0) { 4223 /* 4224 * This means especially, that it is not set 4225 * at the SCTP layer. So use the value from 4226 * the IP layer. 4227 */ 4228 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo); 4229 } 4230 flowlabel &= 0x000fffff; 4231 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr); 4232 if (port) { 4233 len += sizeof(struct udphdr); 4234 } 4235 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA); 4236 if (newm == NULL) { 4237 sctp_m_freem(m); 4238 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4239 return (ENOMEM); 4240 } 4241 SCTP_ALIGN_TO_END(newm, len); 4242 SCTP_BUF_LEN(newm) = len; 4243 SCTP_BUF_NEXT(newm) = m; 4244 m = newm; 4245 if (net != NULL) { 4246 #ifdef INVARIANTS 4247 if (net->flowidset == 0) { 4248 panic("Flow ID not set"); 4249 } 4250 #endif 4251 m->m_pkthdr.flowid = net->flowid; 4252 m->m_flags |= M_FLOWID; 4253 } else { 4254 if ((init != NULL) && (init->m_flags & M_FLOWID)) { 4255 m->m_pkthdr.flowid = init->m_pkthdr.flowid; 4256 m->m_flags |= M_FLOWID; 4257 } 4258 } 4259 packet_length = sctp_calculate_len(m); 4260 4261 ip6h = mtod(m, struct ip6_hdr *); 4262 /* protect *sin6 from overwrite */ 4263 sin6 = (struct sockaddr_in6 *)to; 4264 tmp = *sin6; 4265 sin6 = &tmp; 4266 4267 /* KAME hack: embed scopeid */ 4268 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4269 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4270 return (EINVAL); 4271 } 4272 if (net == NULL) { 4273 memset(&ip6route, 0, sizeof(ip6route)); 4274 ro = (sctp_route_t *) & ip6route; 4275 memcpy(&ro->ro_dst, sin6, sin6->sin6_len); 4276 } else { 4277 ro = (sctp_route_t *) & net->ro; 4278 } 4279 /* 4280 * We assume here that inp_flow is in host byte 4281 * order within the TCB! 4282 */ 4283 if (tos_value == 0) { 4284 /* 4285 * This means especially, that it is not set 4286 * at the SCTP layer. So use the value from 4287 * the IP layer. 4288 */ 4289 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff; 4290 } 4291 tos_value &= 0xfc; 4292 if (ecn_ok) { 4293 tos_value |= sctp_get_ect(stcb, chk); 4294 } 4295 flowinfo = 0x06; 4296 flowinfo <<= 8; 4297 flowinfo |= tos_value; 4298 flowinfo <<= 20; 4299 flowinfo |= flowlabel; 4300 ip6h->ip6_flow = htonl(flowinfo); 4301 if (port) { 4302 ip6h->ip6_nxt = IPPROTO_UDP; 4303 } else { 4304 ip6h->ip6_nxt = IPPROTO_SCTP; 4305 } 4306 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr)); 4307 ip6h->ip6_dst = sin6->sin6_addr; 4308 4309 /* 4310 * Add SRC address selection here: we can only reuse 4311 * to a limited degree the kame src-addr-sel, since 4312 * we can try their selection but it may not be 4313 * bound. 4314 */ 4315 bzero(&lsa6_tmp, sizeof(lsa6_tmp)); 4316 lsa6_tmp.sin6_family = AF_INET6; 4317 lsa6_tmp.sin6_len = sizeof(lsa6_tmp); 4318 lsa6 = &lsa6_tmp; 4319 if (net && out_of_asoc_ok == 0) { 4320 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) { 4321 sctp_free_ifa(net->ro._s_addr); 4322 net->ro._s_addr = NULL; 4323 net->src_addr_selected = 0; 4324 if (ro->ro_rt) { 4325 RTFREE(ro->ro_rt); 4326 ro->ro_rt = NULL; 4327 } 4328 } 4329 if (net->src_addr_selected == 0) { 4330 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4331 /* KAME hack: embed scopeid */ 4332 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4333 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4334 return (EINVAL); 4335 } 4336 /* Cache the source address */ 4337 net->ro._s_addr = sctp_source_address_selection(inp, 4338 stcb, 4339 ro, 4340 net, 4341 0, 4342 vrf_id); 4343 (void)sa6_recoverscope(sin6); 4344 net->src_addr_selected = 1; 4345 } 4346 if (net->ro._s_addr == NULL) { 4347 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n"); 4348 net->src_addr_selected = 0; 4349 sctp_handle_no_route(stcb, net, so_locked); 4350 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4351 sctp_m_freem(m); 4352 return (EHOSTUNREACH); 4353 } 4354 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr; 4355 } else { 4356 sin6 = (struct sockaddr_in6 *)&ro->ro_dst; 4357 /* KAME hack: embed scopeid */ 4358 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4359 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4360 return (EINVAL); 4361 } 4362 if (over_addr == NULL) { 4363 struct sctp_ifa *_lsrc; 4364 4365 _lsrc = sctp_source_address_selection(inp, stcb, ro, 4366 net, 4367 out_of_asoc_ok, 4368 vrf_id); 4369 if (_lsrc == NULL) { 4370 sctp_handle_no_route(stcb, net, so_locked); 4371 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4372 sctp_m_freem(m); 4373 return (EHOSTUNREACH); 4374 } 4375 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr; 4376 sctp_free_ifa(_lsrc); 4377 } else { 4378 lsa6->sin6_addr = over_addr->sin6.sin6_addr; 4379 SCTP_RTALLOC(ro, vrf_id); 4380 } 4381 (void)sa6_recoverscope(sin6); 4382 } 4383 lsa6->sin6_port = inp->sctp_lport; 4384 4385 if (ro->ro_rt == NULL) { 4386 /* 4387 * src addr selection failed to find a route 4388 * (or valid source addr), so we can't get 4389 * there from here! 4390 */ 4391 sctp_handle_no_route(stcb, net, so_locked); 4392 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4393 sctp_m_freem(m); 4394 return (EHOSTUNREACH); 4395 } 4396 /* 4397 * XXX: sa6 may not have a valid sin6_scope_id in 4398 * the non-SCOPEDROUTING case. 4399 */ 4400 bzero(&lsa6_storage, sizeof(lsa6_storage)); 4401 lsa6_storage.sin6_family = AF_INET6; 4402 lsa6_storage.sin6_len = sizeof(lsa6_storage); 4403 lsa6_storage.sin6_addr = lsa6->sin6_addr; 4404 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) { 4405 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error); 4406 sctp_m_freem(m); 4407 return (error); 4408 } 4409 /* XXX */ 4410 lsa6_storage.sin6_addr = lsa6->sin6_addr; 4411 lsa6_storage.sin6_port = inp->sctp_lport; 4412 lsa6 = &lsa6_storage; 4413 ip6h->ip6_src = lsa6->sin6_addr; 4414 4415 if (port) { 4416 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); 4417 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4418 udp->uh_dport = port; 4419 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr)); 4420 udp->uh_sum = 0; 4421 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); 4422 } else { 4423 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); 4424 } 4425 4426 sctphdr->src_port = src_port; 4427 sctphdr->dest_port = dest_port; 4428 sctphdr->v_tag = v_tag; 4429 sctphdr->checksum = 0; 4430 4431 /* 4432 * We set the hop limit now since there is a good 4433 * chance that our ro pointer is now filled 4434 */ 4435 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro); 4436 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 4437 4438 #ifdef SCTP_DEBUG 4439 /* Copy to be sure something bad is not happening */ 4440 sin6->sin6_addr = ip6h->ip6_dst; 4441 lsa6->sin6_addr = ip6h->ip6_src; 4442 #endif 4443 4444 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n"); 4445 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: "); 4446 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6); 4447 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: "); 4448 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6); 4449 if (net) { 4450 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4451 /* 4452 * preserve the port and scope for link 4453 * local send 4454 */ 4455 prev_scope = sin6->sin6_scope_id; 4456 prev_port = sin6->sin6_port; 4457 } 4458 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 4459 /* failed to prepend data, give up */ 4460 sctp_m_freem(m); 4461 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4462 return (ENOMEM); 4463 } 4464 #ifdef SCTP_PACKET_LOGGING 4465 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 4466 sctp_packet_log(m, packet_length); 4467 #endif 4468 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 4469 if (port) { 4470 #if defined(SCTP_WITH_NO_CSUM) 4471 SCTP_STAT_INCR(sctps_sendnocrc); 4472 #else 4473 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) && 4474 (stcb) && 4475 (stcb->asoc.loopback_scope))) { 4476 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 4477 SCTP_STAT_INCR(sctps_sendswcrc); 4478 } else { 4479 SCTP_STAT_INCR(sctps_sendnocrc); 4480 } 4481 #endif 4482 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) { 4483 udp->uh_sum = 0xffff; 4484 } 4485 } else { 4486 #if defined(SCTP_WITH_NO_CSUM) 4487 SCTP_STAT_INCR(sctps_sendnocrc); 4488 #else 4489 m->m_pkthdr.csum_flags = CSUM_SCTP; 4490 m->m_pkthdr.csum_data = 0; 4491 SCTP_STAT_INCR(sctps_sendhwcrc); 4492 #endif 4493 } 4494 /* send it out. table id is taken from stcb */ 4495 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4496 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4497 so = SCTP_INP_SO(inp); 4498 SCTP_SOCKET_UNLOCK(so, 0); 4499 } 4500 #endif 4501 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id); 4502 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4503 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4504 atomic_add_int(&stcb->asoc.refcnt, 1); 4505 SCTP_TCB_UNLOCK(stcb); 4506 SCTP_SOCKET_LOCK(so, 0); 4507 SCTP_TCB_LOCK(stcb); 4508 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4509 } 4510 #endif 4511 if (net) { 4512 /* for link local this must be done */ 4513 sin6->sin6_scope_id = prev_scope; 4514 sin6->sin6_port = prev_port; 4515 } 4516 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret); 4517 SCTP_STAT_INCR(sctps_sendpackets); 4518 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 4519 if (ret) { 4520 SCTP_STAT_INCR(sctps_senderrors); 4521 } 4522 if (net == NULL) { 4523 /* Now if we had a temp route free it */ 4524 if (ro->ro_rt) { 4525 RTFREE(ro->ro_rt); 4526 } 4527 } else { 4528 /* 4529 * PMTU check versus smallest asoc MTU goes 4530 * here 4531 */ 4532 if (ro->ro_rt == NULL) { 4533 /* Route was freed */ 4534 if (net->ro._s_addr && 4535 net->src_addr_selected) { 4536 sctp_free_ifa(net->ro._s_addr); 4537 net->ro._s_addr = NULL; 4538 } 4539 net->src_addr_selected = 0; 4540 } 4541 if ((ro->ro_rt != NULL) && 4542 (net->ro._s_addr)) { 4543 uint32_t mtu; 4544 4545 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); 4546 if (mtu && 4547 (stcb->asoc.smallest_mtu > mtu)) { 4548 sctp_mtu_size_reset(inp, &stcb->asoc, mtu); 4549 net->mtu = mtu; 4550 if (net->port) { 4551 net->mtu -= sizeof(struct udphdr); 4552 } 4553 } 4554 } else if (ifp) { 4555 if (ND_IFINFO(ifp)->linkmtu && 4556 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) { 4557 sctp_mtu_size_reset(inp, 4558 &stcb->asoc, 4559 ND_IFINFO(ifp)->linkmtu); 4560 } 4561 } 4562 } 4563 return (ret); 4564 } 4565 #endif 4566 default: 4567 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n", 4568 ((struct sockaddr *)to)->sa_family); 4569 sctp_m_freem(m); 4570 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 4571 return (EFAULT); 4572 } 4573 } 4574 4575 4576 void 4577 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked 4578 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 4579 SCTP_UNUSED 4580 #endif 4581 ) 4582 { 4583 struct mbuf *m, *m_at, *mp_last; 4584 struct sctp_nets *net; 4585 struct sctp_init_chunk *init; 4586 struct sctp_supported_addr_param *sup_addr; 4587 struct sctp_adaptation_layer_indication *ali; 4588 struct sctp_ecn_supported_param *ecn; 4589 struct sctp_prsctp_supported_param *prsctp; 4590 struct sctp_supported_chunk_types_param *pr_supported; 4591 int cnt_inits_to = 0; 4592 int padval, ret; 4593 int num_ext; 4594 int p_len; 4595 4596 /* INIT's always go to the primary (and usually ONLY address) */ 4597 mp_last = NULL; 4598 net = stcb->asoc.primary_destination; 4599 if (net == NULL) { 4600 net = TAILQ_FIRST(&stcb->asoc.nets); 4601 if (net == NULL) { 4602 /* TSNH */ 4603 return; 4604 } 4605 /* we confirm any address we send an INIT to */ 4606 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 4607 (void)sctp_set_primary_addr(stcb, NULL, net); 4608 } else { 4609 /* we confirm any address we send an INIT to */ 4610 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 4611 } 4612 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n"); 4613 #ifdef INET6 4614 if (((struct sockaddr *)&(net->ro._l_addr))->sa_family == AF_INET6) { 4615 /* 4616 * special hook, if we are sending to link local it will not 4617 * show up in our private address count. 4618 */ 4619 struct sockaddr_in6 *sin6l; 4620 4621 sin6l = &net->ro._l_addr.sin6; 4622 if (IN6_IS_ADDR_LINKLOCAL(&sin6l->sin6_addr)) 4623 cnt_inits_to = 1; 4624 } 4625 #endif 4626 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 4627 /* This case should not happen */ 4628 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n"); 4629 return; 4630 } 4631 /* start the INIT timer */ 4632 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net); 4633 4634 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA); 4635 if (m == NULL) { 4636 /* No memory, INIT timer will re-attempt. */ 4637 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n"); 4638 return; 4639 } 4640 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk); 4641 /* 4642 * assume peer supports asconf in order to be able to queue local 4643 * address changes while an INIT is in flight and before the assoc 4644 * is established. 4645 */ 4646 stcb->asoc.peer_supports_asconf = 1; 4647 /* Now lets put the SCTP header in place */ 4648 init = mtod(m, struct sctp_init_chunk *); 4649 /* now the chunk header */ 4650 init->ch.chunk_type = SCTP_INITIATION; 4651 init->ch.chunk_flags = 0; 4652 /* fill in later from mbuf we build */ 4653 init->ch.chunk_length = 0; 4654 /* place in my tag */ 4655 init->init.initiate_tag = htonl(stcb->asoc.my_vtag); 4656 /* set up some of the credits. */ 4657 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0, 4658 SCTP_MINIMAL_RWND)); 4659 4660 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams); 4661 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams); 4662 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number); 4663 /* now the address restriction */ 4664 /* XXX Should we take the address family of the socket into account? */ 4665 sup_addr = (struct sctp_supported_addr_param *)((caddr_t)init + 4666 sizeof(*init)); 4667 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE); 4668 #ifdef INET6 4669 #ifdef INET 4670 /* we support 2 types: IPv4/IPv6 */ 4671 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + 2 * sizeof(uint16_t)); 4672 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS); 4673 sup_addr->addr_type[1] = htons(SCTP_IPV6_ADDRESS); 4674 #else 4675 /* we support 1 type: IPv6 */ 4676 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t)); 4677 sup_addr->addr_type[0] = htons(SCTP_IPV6_ADDRESS); 4678 sup_addr->addr_type[1] = htons(0); /* this is the padding */ 4679 #endif 4680 #else 4681 /* we support 1 type: IPv4 */ 4682 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t)); 4683 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS); 4684 sup_addr->addr_type[1] = htons(0); /* this is the padding */ 4685 #endif 4686 SCTP_BUF_LEN(m) += sizeof(struct sctp_supported_addr_param); 4687 /* adaptation layer indication parameter */ 4688 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)sup_addr + sizeof(struct sctp_supported_addr_param)); 4689 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 4690 ali->ph.param_length = htons(sizeof(*ali)); 4691 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator); 4692 SCTP_BUF_LEN(m) += sizeof(*ali); 4693 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali)); 4694 4695 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) { 4696 /* Add NAT friendly parameter */ 4697 struct sctp_paramhdr *ph; 4698 4699 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 4700 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); 4701 ph->param_length = htons(sizeof(struct sctp_paramhdr)); 4702 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr); 4703 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ph + sizeof(*ph)); 4704 } 4705 /* now any cookie time extensions */ 4706 if (stcb->asoc.cookie_preserve_req) { 4707 struct sctp_cookie_perserve_param *cookie_preserve; 4708 4709 cookie_preserve = (struct sctp_cookie_perserve_param *)(ecn); 4710 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE); 4711 cookie_preserve->ph.param_length = htons( 4712 sizeof(*cookie_preserve)); 4713 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req); 4714 SCTP_BUF_LEN(m) += sizeof(*cookie_preserve); 4715 ecn = (struct sctp_ecn_supported_param *)( 4716 (caddr_t)cookie_preserve + sizeof(*cookie_preserve)); 4717 stcb->asoc.cookie_preserve_req = 0; 4718 } 4719 /* ECN parameter */ 4720 if (stcb->asoc.ecn_allowed == 1) { 4721 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE); 4722 ecn->ph.param_length = htons(sizeof(*ecn)); 4723 SCTP_BUF_LEN(m) += sizeof(*ecn); 4724 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn + 4725 sizeof(*ecn)); 4726 } else { 4727 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn); 4728 } 4729 /* And now tell the peer we do pr-sctp */ 4730 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED); 4731 prsctp->ph.param_length = htons(sizeof(*prsctp)); 4732 SCTP_BUF_LEN(m) += sizeof(*prsctp); 4733 4734 /* And now tell the peer we do all the extensions */ 4735 pr_supported = (struct sctp_supported_chunk_types_param *) 4736 ((caddr_t)prsctp + sizeof(*prsctp)); 4737 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 4738 num_ext = 0; 4739 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 4740 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 4741 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 4742 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 4743 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 4744 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) { 4745 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 4746 } 4747 if (stcb->asoc.sctp_nr_sack_on_off == 1) { 4748 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; 4749 } 4750 p_len = sizeof(*pr_supported) + num_ext; 4751 pr_supported->ph.param_length = htons(p_len); 4752 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len); 4753 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4754 4755 4756 /* add authentication parameters */ 4757 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) { 4758 struct sctp_auth_random *randp; 4759 struct sctp_auth_hmac_algo *hmacs; 4760 struct sctp_auth_chunk_list *chunks; 4761 4762 /* attach RANDOM parameter, if available */ 4763 if (stcb->asoc.authinfo.random != NULL) { 4764 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 4765 p_len = sizeof(*randp) + stcb->asoc.authinfo.random_len; 4766 /* random key already contains the header */ 4767 bcopy(stcb->asoc.authinfo.random->key, randp, p_len); 4768 /* zero out any padding required */ 4769 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len); 4770 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4771 } 4772 /* add HMAC_ALGO parameter */ 4773 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 4774 p_len = sctp_serialize_hmaclist(stcb->asoc.local_hmacs, 4775 (uint8_t *) hmacs->hmac_ids); 4776 if (p_len > 0) { 4777 p_len += sizeof(*hmacs); 4778 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 4779 hmacs->ph.param_length = htons(p_len); 4780 /* zero out any padding required */ 4781 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len); 4782 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4783 } 4784 /* add CHUNKS parameter */ 4785 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 4786 p_len = sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, 4787 chunks->chunk_types); 4788 if (p_len > 0) { 4789 p_len += sizeof(*chunks); 4790 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 4791 chunks->ph.param_length = htons(p_len); 4792 /* zero out any padding required */ 4793 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len); 4794 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4795 } 4796 } 4797 m_at = m; 4798 /* now the addresses */ 4799 { 4800 struct sctp_scoping scp; 4801 4802 /* 4803 * To optimize this we could put the scoping stuff into a 4804 * structure and remove the individual uint8's from the 4805 * assoc structure. Then we could just sifa in the address 4806 * within the stcb.. but for now this is a quick hack to get 4807 * the address stuff teased apart. 4808 */ 4809 scp.ipv4_addr_legal = stcb->asoc.ipv4_addr_legal; 4810 scp.ipv6_addr_legal = stcb->asoc.ipv6_addr_legal; 4811 scp.loopback_scope = stcb->asoc.loopback_scope; 4812 scp.ipv4_local_scope = stcb->asoc.ipv4_local_scope; 4813 scp.local_scope = stcb->asoc.local_scope; 4814 scp.site_scope = stcb->asoc.site_scope; 4815 4816 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to); 4817 } 4818 4819 /* calulate the size and update pkt header and chunk header */ 4820 p_len = 0; 4821 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 4822 if (SCTP_BUF_NEXT(m_at) == NULL) 4823 mp_last = m_at; 4824 p_len += SCTP_BUF_LEN(m_at); 4825 } 4826 init->ch.chunk_length = htons(p_len); 4827 /* 4828 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return 4829 * here since the timer will drive a retranmission. 4830 */ 4831 4832 /* I don't expect this to execute but we will be safe here */ 4833 padval = p_len % 4; 4834 if ((padval) && (mp_last)) { 4835 /* 4836 * The compiler worries that mp_last may not be set even 4837 * though I think it is impossible :-> however we add 4838 * mp_last here just in case. 4839 */ 4840 ret = sctp_add_pad_tombuf(mp_last, (4 - padval)); 4841 if (ret) { 4842 /* Houston we have a problem, no space */ 4843 sctp_m_freem(m); 4844 return; 4845 } 4846 p_len += padval; 4847 } 4848 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n"); 4849 ret = sctp_lowlevel_chunk_output(inp, stcb, net, 4850 (struct sockaddr *)&net->ro._l_addr, 4851 m, 0, NULL, 0, 0, 0, NULL, 0, 4852 inp->sctp_lport, stcb->rport, htonl(0), 4853 net->port, so_locked, NULL, NULL); 4854 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret); 4855 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 4856 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 4857 } 4858 4859 struct mbuf * 4860 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt, 4861 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly) 4862 { 4863 /* 4864 * Given a mbuf containing an INIT or INIT-ACK with the param_offset 4865 * being equal to the beginning of the params i.e. (iphlen + 4866 * sizeof(struct sctp_init_msg) parse through the parameters to the 4867 * end of the mbuf verifying that all parameters are known. 4868 * 4869 * For unknown parameters build and return a mbuf with 4870 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop 4871 * processing this chunk stop, and set *abort_processing to 1. 4872 * 4873 * By having param_offset be pre-set to where parameters begin it is 4874 * hoped that this routine may be reused in the future by new 4875 * features. 4876 */ 4877 struct sctp_paramhdr *phdr, params; 4878 4879 struct mbuf *mat, *op_err; 4880 char tempbuf[SCTP_PARAM_BUFFER_SIZE]; 4881 int at, limit, pad_needed; 4882 uint16_t ptype, plen, padded_size; 4883 int err_at; 4884 4885 *abort_processing = 0; 4886 mat = in_initpkt; 4887 err_at = 0; 4888 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk); 4889 at = param_offset; 4890 op_err = NULL; 4891 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n"); 4892 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 4893 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) { 4894 ptype = ntohs(phdr->param_type); 4895 plen = ntohs(phdr->param_length); 4896 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) { 4897 /* wacked parameter */ 4898 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen); 4899 goto invalid_size; 4900 } 4901 limit -= SCTP_SIZE32(plen); 4902 /*- 4903 * All parameters for all chunks that we know/understand are 4904 * listed here. We process them other places and make 4905 * appropriate stop actions per the upper bits. However this 4906 * is the generic routine processor's can call to get back 4907 * an operr.. to either incorporate (init-ack) or send. 4908 */ 4909 padded_size = SCTP_SIZE32(plen); 4910 switch (ptype) { 4911 /* Param's with variable size */ 4912 case SCTP_HEARTBEAT_INFO: 4913 case SCTP_STATE_COOKIE: 4914 case SCTP_UNRECOG_PARAM: 4915 case SCTP_ERROR_CAUSE_IND: 4916 /* ok skip fwd */ 4917 at += padded_size; 4918 break; 4919 /* Param's with variable size within a range */ 4920 case SCTP_CHUNK_LIST: 4921 case SCTP_SUPPORTED_CHUNK_EXT: 4922 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) { 4923 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen); 4924 goto invalid_size; 4925 } 4926 at += padded_size; 4927 break; 4928 case SCTP_SUPPORTED_ADDRTYPE: 4929 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) { 4930 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen); 4931 goto invalid_size; 4932 } 4933 at += padded_size; 4934 break; 4935 case SCTP_RANDOM: 4936 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) { 4937 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen); 4938 goto invalid_size; 4939 } 4940 at += padded_size; 4941 break; 4942 case SCTP_SET_PRIM_ADDR: 4943 case SCTP_DEL_IP_ADDRESS: 4944 case SCTP_ADD_IP_ADDRESS: 4945 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) && 4946 (padded_size != sizeof(struct sctp_asconf_addr_param))) { 4947 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen); 4948 goto invalid_size; 4949 } 4950 at += padded_size; 4951 break; 4952 /* Param's with a fixed size */ 4953 case SCTP_IPV4_ADDRESS: 4954 if (padded_size != sizeof(struct sctp_ipv4addr_param)) { 4955 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen); 4956 goto invalid_size; 4957 } 4958 at += padded_size; 4959 break; 4960 case SCTP_IPV6_ADDRESS: 4961 if (padded_size != sizeof(struct sctp_ipv6addr_param)) { 4962 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen); 4963 goto invalid_size; 4964 } 4965 at += padded_size; 4966 break; 4967 case SCTP_COOKIE_PRESERVE: 4968 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) { 4969 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen); 4970 goto invalid_size; 4971 } 4972 at += padded_size; 4973 break; 4974 case SCTP_HAS_NAT_SUPPORT: 4975 *nat_friendly = 1; 4976 /* fall through */ 4977 case SCTP_PRSCTP_SUPPORTED: 4978 4979 if (padded_size != sizeof(struct sctp_paramhdr)) { 4980 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen); 4981 goto invalid_size; 4982 } 4983 at += padded_size; 4984 break; 4985 case SCTP_ECN_CAPABLE: 4986 if (padded_size != sizeof(struct sctp_ecn_supported_param)) { 4987 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen); 4988 goto invalid_size; 4989 } 4990 at += padded_size; 4991 break; 4992 case SCTP_ULP_ADAPTATION: 4993 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) { 4994 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen); 4995 goto invalid_size; 4996 } 4997 at += padded_size; 4998 break; 4999 case SCTP_SUCCESS_REPORT: 5000 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) { 5001 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen); 5002 goto invalid_size; 5003 } 5004 at += padded_size; 5005 break; 5006 case SCTP_HOSTNAME_ADDRESS: 5007 { 5008 /* We can NOT handle HOST NAME addresses!! */ 5009 int l_len; 5010 5011 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n"); 5012 *abort_processing = 1; 5013 if (op_err == NULL) { 5014 /* Ok need to try to get a mbuf */ 5015 #ifdef INET6 5016 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5017 #else 5018 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5019 #endif 5020 l_len += plen; 5021 l_len += sizeof(struct sctp_paramhdr); 5022 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA); 5023 if (op_err) { 5024 SCTP_BUF_LEN(op_err) = 0; 5025 /* 5026 * pre-reserve space for ip 5027 * and sctp header and 5028 * chunk hdr 5029 */ 5030 #ifdef INET6 5031 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5032 #else 5033 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5034 #endif 5035 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5036 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5037 } 5038 } 5039 if (op_err) { 5040 /* If we have space */ 5041 struct sctp_paramhdr s; 5042 5043 if (err_at % 4) { 5044 uint32_t cpthis = 0; 5045 5046 pad_needed = 4 - (err_at % 4); 5047 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5048 err_at += pad_needed; 5049 } 5050 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR); 5051 s.param_length = htons(sizeof(s) + plen); 5052 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5053 err_at += sizeof(s); 5054 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen)); 5055 if (phdr == NULL) { 5056 sctp_m_freem(op_err); 5057 /* 5058 * we are out of memory but 5059 * we still need to have a 5060 * look at what to do (the 5061 * system is in trouble 5062 * though). 5063 */ 5064 return (NULL); 5065 } 5066 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 5067 err_at += plen; 5068 } 5069 return (op_err); 5070 break; 5071 } 5072 default: 5073 /* 5074 * we do not recognize the parameter figure out what 5075 * we do. 5076 */ 5077 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype); 5078 if ((ptype & 0x4000) == 0x4000) { 5079 /* Report bit is set?? */ 5080 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n"); 5081 if (op_err == NULL) { 5082 int l_len; 5083 5084 /* Ok need to try to get an mbuf */ 5085 #ifdef INET6 5086 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5087 #else 5088 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5089 #endif 5090 l_len += plen; 5091 l_len += sizeof(struct sctp_paramhdr); 5092 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA); 5093 if (op_err) { 5094 SCTP_BUF_LEN(op_err) = 0; 5095 #ifdef INET6 5096 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5097 #else 5098 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5099 #endif 5100 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5101 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5102 } 5103 } 5104 if (op_err) { 5105 /* If we have space */ 5106 struct sctp_paramhdr s; 5107 5108 if (err_at % 4) { 5109 uint32_t cpthis = 0; 5110 5111 pad_needed = 4 - (err_at % 4); 5112 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5113 err_at += pad_needed; 5114 } 5115 s.param_type = htons(SCTP_UNRECOG_PARAM); 5116 s.param_length = htons(sizeof(s) + plen); 5117 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5118 err_at += sizeof(s); 5119 if (plen > sizeof(tempbuf)) { 5120 plen = sizeof(tempbuf); 5121 } 5122 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen)); 5123 if (phdr == NULL) { 5124 sctp_m_freem(op_err); 5125 /* 5126 * we are out of memory but 5127 * we still need to have a 5128 * look at what to do (the 5129 * system is in trouble 5130 * though). 5131 */ 5132 op_err = NULL; 5133 goto more_processing; 5134 } 5135 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 5136 err_at += plen; 5137 } 5138 } 5139 more_processing: 5140 if ((ptype & 0x8000) == 0x0000) { 5141 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n"); 5142 return (op_err); 5143 } else { 5144 /* skip this chunk and continue processing */ 5145 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n"); 5146 at += SCTP_SIZE32(plen); 5147 } 5148 break; 5149 5150 } 5151 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 5152 } 5153 return (op_err); 5154 invalid_size: 5155 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n"); 5156 *abort_processing = 1; 5157 if ((op_err == NULL) && phdr) { 5158 int l_len; 5159 5160 #ifdef INET6 5161 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5162 #else 5163 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 5164 #endif 5165 l_len += (2 * sizeof(struct sctp_paramhdr)); 5166 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA); 5167 if (op_err) { 5168 SCTP_BUF_LEN(op_err) = 0; 5169 #ifdef INET6 5170 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5171 #else 5172 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5173 #endif 5174 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5175 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5176 } 5177 } 5178 if ((op_err) && phdr) { 5179 struct sctp_paramhdr s; 5180 5181 if (err_at % 4) { 5182 uint32_t cpthis = 0; 5183 5184 pad_needed = 4 - (err_at % 4); 5185 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5186 err_at += pad_needed; 5187 } 5188 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); 5189 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr)); 5190 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5191 err_at += sizeof(s); 5192 /* Only copy back the p-hdr that caused the issue */ 5193 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr); 5194 } 5195 return (op_err); 5196 } 5197 5198 static int 5199 sctp_are_there_new_addresses(struct sctp_association *asoc, 5200 struct mbuf *in_initpkt, int iphlen, int offset) 5201 { 5202 /* 5203 * Given a INIT packet, look through the packet to verify that there 5204 * are NO new addresses. As we go through the parameters add reports 5205 * of any un-understood parameters that require an error. Also we 5206 * must return (1) to drop the packet if we see a un-understood 5207 * parameter that tells us to drop the chunk. 5208 */ 5209 struct sockaddr *sa_touse; 5210 struct sockaddr *sa; 5211 struct sctp_paramhdr *phdr, params; 5212 uint16_t ptype, plen; 5213 uint8_t fnd; 5214 struct sctp_nets *net; 5215 struct ip *iph; 5216 5217 #ifdef INET 5218 struct sockaddr_in sin4, *sa4; 5219 5220 #endif 5221 #ifdef INET6 5222 struct sockaddr_in6 sin6, *sa6; 5223 struct ip6_hdr *ip6h; 5224 5225 #endif 5226 5227 #ifdef INET 5228 memset(&sin4, 0, sizeof(sin4)); 5229 sin4.sin_family = AF_INET; 5230 sin4.sin_len = sizeof(sin4); 5231 #endif 5232 #ifdef INET6 5233 memset(&sin6, 0, sizeof(sin6)); 5234 sin6.sin6_family = AF_INET6; 5235 sin6.sin6_len = sizeof(sin6); 5236 #endif 5237 sa_touse = NULL; 5238 /* First what about the src address of the pkt ? */ 5239 iph = mtod(in_initpkt, struct ip *); 5240 switch (iph->ip_v) { 5241 #ifdef INET 5242 case IPVERSION: 5243 /* source addr is IPv4 */ 5244 sin4.sin_addr = iph->ip_src; 5245 sa_touse = (struct sockaddr *)&sin4; 5246 break; 5247 #endif 5248 #ifdef INET6 5249 case IPV6_VERSION >> 4: 5250 /* source addr is IPv6 */ 5251 ip6h = mtod(in_initpkt, struct ip6_hdr *); 5252 sin6.sin6_addr = ip6h->ip6_src; 5253 sa_touse = (struct sockaddr *)&sin6; 5254 break; 5255 #endif 5256 default: 5257 return (1); 5258 } 5259 5260 fnd = 0; 5261 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5262 sa = (struct sockaddr *)&net->ro._l_addr; 5263 if (sa->sa_family == sa_touse->sa_family) { 5264 #ifdef INET 5265 if (sa->sa_family == AF_INET) { 5266 sa4 = (struct sockaddr_in *)sa; 5267 if (sa4->sin_addr.s_addr == sin4.sin_addr.s_addr) { 5268 fnd = 1; 5269 break; 5270 } 5271 } 5272 #endif 5273 #ifdef INET6 5274 if (sa->sa_family == AF_INET6) { 5275 sa6 = (struct sockaddr_in6 *)sa; 5276 if (SCTP6_ARE_ADDR_EQUAL(sa6, &sin6)) { 5277 fnd = 1; 5278 break; 5279 } 5280 } 5281 #endif 5282 } 5283 } 5284 if (fnd == 0) { 5285 /* New address added! no need to look futher. */ 5286 return (1); 5287 } 5288 /* Ok so far lets munge through the rest of the packet */ 5289 offset += sizeof(struct sctp_init_chunk); 5290 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); 5291 while (phdr) { 5292 sa_touse = NULL; 5293 ptype = ntohs(phdr->param_type); 5294 plen = ntohs(phdr->param_length); 5295 switch (ptype) { 5296 #ifdef INET 5297 case SCTP_IPV4_ADDRESS: 5298 { 5299 struct sctp_ipv4addr_param *p4, p4_buf; 5300 5301 phdr = sctp_get_next_param(in_initpkt, offset, 5302 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 5303 if (plen != sizeof(struct sctp_ipv4addr_param) || 5304 phdr == NULL) { 5305 return (1); 5306 } 5307 p4 = (struct sctp_ipv4addr_param *)phdr; 5308 sin4.sin_addr.s_addr = p4->addr; 5309 sa_touse = (struct sockaddr *)&sin4; 5310 } 5311 #endif 5312 #ifdef INET6 5313 case SCTP_IPV6_ADDRESS: 5314 { 5315 struct sctp_ipv6addr_param *p6, p6_buf; 5316 5317 phdr = sctp_get_next_param(in_initpkt, offset, 5318 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 5319 if (plen != sizeof(struct sctp_ipv6addr_param) || 5320 phdr == NULL) { 5321 return (1); 5322 } 5323 p6 = (struct sctp_ipv6addr_param *)phdr; 5324 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 5325 sizeof(p6->addr)); 5326 sa_touse = (struct sockaddr *)&sin6; 5327 } 5328 #endif 5329 default: 5330 sa_touse = NULL; 5331 } 5332 if (sa_touse) { 5333 /* ok, sa_touse points to one to check */ 5334 fnd = 0; 5335 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5336 sa = (struct sockaddr *)&net->ro._l_addr; 5337 if (sa->sa_family != sa_touse->sa_family) { 5338 continue; 5339 } 5340 #ifdef INET 5341 if (sa->sa_family == AF_INET) { 5342 sa4 = (struct sockaddr_in *)sa; 5343 if (sa4->sin_addr.s_addr == 5344 sin4.sin_addr.s_addr) { 5345 fnd = 1; 5346 break; 5347 } 5348 } 5349 #endif 5350 #ifdef INET6 5351 if (sa->sa_family == AF_INET6) { 5352 sa6 = (struct sockaddr_in6 *)sa; 5353 if (SCTP6_ARE_ADDR_EQUAL( 5354 sa6, &sin6)) { 5355 fnd = 1; 5356 break; 5357 } 5358 } 5359 #endif 5360 } 5361 if (!fnd) { 5362 /* New addr added! no need to look further */ 5363 return (1); 5364 } 5365 } 5366 offset += SCTP_SIZE32(plen); 5367 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); 5368 } 5369 return (0); 5370 } 5371 5372 /* 5373 * Given a MBUF chain that was sent into us containing an INIT. Build a 5374 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done 5375 * a pullup to include IPv6/4header, SCTP header and initial part of INIT 5376 * message (i.e. the struct sctp_init_msg). 5377 */ 5378 void 5379 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 5380 struct mbuf *init_pkt, int iphlen, int offset, struct sctphdr *sh, 5381 struct sctp_init_chunk *init_chk, uint32_t vrf_id, uint16_t port, int hold_inp_lock) 5382 { 5383 struct sctp_association *asoc; 5384 struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last; 5385 struct sctp_init_ack_chunk *initack; 5386 struct sctp_adaptation_layer_indication *ali; 5387 struct sctp_ecn_supported_param *ecn; 5388 struct sctp_prsctp_supported_param *prsctp; 5389 struct sctp_supported_chunk_types_param *pr_supported; 5390 union sctp_sockstore store, store1, *over_addr; 5391 5392 #ifdef INET 5393 struct sockaddr_in *sin, *to_sin; 5394 5395 #endif 5396 #ifdef INET6 5397 struct sockaddr_in6 *sin6, *to_sin6; 5398 5399 #endif 5400 struct ip *iph; 5401 5402 #ifdef INET6 5403 struct ip6_hdr *ip6; 5404 5405 #endif 5406 struct sockaddr *to; 5407 struct sctp_state_cookie stc; 5408 struct sctp_nets *net = NULL; 5409 uint8_t *signature = NULL; 5410 int cnt_inits_to = 0; 5411 uint16_t his_limit, i_want; 5412 int abort_flag, padval; 5413 int num_ext; 5414 int p_len; 5415 int nat_friendly = 0; 5416 struct socket *so; 5417 5418 if (stcb) 5419 asoc = &stcb->asoc; 5420 else 5421 asoc = NULL; 5422 mp_last = NULL; 5423 if ((asoc != NULL) && 5424 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 5425 (sctp_are_there_new_addresses(asoc, init_pkt, iphlen, offset))) { 5426 /* new addresses, out of here in non-cookie-wait states */ 5427 /* 5428 * Send a ABORT, we don't add the new address error clause 5429 * though we even set the T bit and copy in the 0 tag.. this 5430 * looks no different than if no listener was present. 5431 */ 5432 sctp_send_abort(init_pkt, iphlen, sh, 0, NULL, vrf_id, port); 5433 return; 5434 } 5435 abort_flag = 0; 5436 op_err = sctp_arethere_unrecognized_parameters(init_pkt, 5437 (offset + sizeof(struct sctp_init_chunk)), 5438 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly); 5439 if (abort_flag) { 5440 do_a_abort: 5441 sctp_send_abort(init_pkt, iphlen, sh, 5442 init_chk->init.initiate_tag, op_err, vrf_id, port); 5443 return; 5444 } 5445 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 5446 if (m == NULL) { 5447 /* No memory, INIT timer will re-attempt. */ 5448 if (op_err) 5449 sctp_m_freem(op_err); 5450 return; 5451 } 5452 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk); 5453 5454 /* the time I built cookie */ 5455 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered); 5456 5457 /* populate any tie tags */ 5458 if (asoc != NULL) { 5459 /* unlock before tag selections */ 5460 stc.tie_tag_my_vtag = asoc->my_vtag_nonce; 5461 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce; 5462 stc.cookie_life = asoc->cookie_life; 5463 net = asoc->primary_destination; 5464 } else { 5465 stc.tie_tag_my_vtag = 0; 5466 stc.tie_tag_peer_vtag = 0; 5467 /* life I will award this cookie */ 5468 stc.cookie_life = inp->sctp_ep.def_cookie_life; 5469 } 5470 5471 /* copy in the ports for later check */ 5472 stc.myport = sh->dest_port; 5473 stc.peerport = sh->src_port; 5474 5475 /* 5476 * If we wanted to honor cookie life extentions, we would add to 5477 * stc.cookie_life. For now we should NOT honor any extension 5478 */ 5479 stc.site_scope = stc.local_scope = stc.loopback_scope = 0; 5480 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 5481 struct inpcb *in_inp; 5482 5483 /* Its a V6 socket */ 5484 in_inp = (struct inpcb *)inp; 5485 stc.ipv6_addr_legal = 1; 5486 /* Now look at the binding flag to see if V4 will be legal */ 5487 if (SCTP_IPV6_V6ONLY(in_inp) == 0) { 5488 stc.ipv4_addr_legal = 1; 5489 } else { 5490 /* V4 addresses are NOT legal on the association */ 5491 stc.ipv4_addr_legal = 0; 5492 } 5493 } else { 5494 /* Its a V4 socket, no - V6 */ 5495 stc.ipv4_addr_legal = 1; 5496 stc.ipv6_addr_legal = 0; 5497 } 5498 5499 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 5500 stc.ipv4_scope = 1; 5501 #else 5502 stc.ipv4_scope = 0; 5503 #endif 5504 /* now for scope setup */ 5505 memset((caddr_t)&store, 0, sizeof(store)); 5506 memset((caddr_t)&store1, 0, sizeof(store1)); 5507 #ifdef INET 5508 sin = &store.sin; 5509 to_sin = &store1.sin; 5510 #endif 5511 #ifdef INET6 5512 sin6 = &store.sin6; 5513 to_sin6 = &store1.sin6; 5514 #endif 5515 iph = mtod(init_pkt, struct ip *); 5516 /* establish the to_addr's */ 5517 switch (iph->ip_v) { 5518 #ifdef INET 5519 case IPVERSION: 5520 to_sin->sin_port = sh->dest_port; 5521 to_sin->sin_family = AF_INET; 5522 to_sin->sin_len = sizeof(struct sockaddr_in); 5523 to_sin->sin_addr = iph->ip_dst; 5524 break; 5525 #endif 5526 #ifdef INET6 5527 case IPV6_VERSION >> 4: 5528 ip6 = mtod(init_pkt, struct ip6_hdr *); 5529 to_sin6->sin6_addr = ip6->ip6_dst; 5530 to_sin6->sin6_scope_id = 0; 5531 to_sin6->sin6_port = sh->dest_port; 5532 to_sin6->sin6_family = AF_INET6; 5533 to_sin6->sin6_len = sizeof(struct sockaddr_in6); 5534 break; 5535 #endif 5536 default: 5537 goto do_a_abort; 5538 break; 5539 }; 5540 5541 if (net == NULL) { 5542 to = (struct sockaddr *)&store; 5543 switch (iph->ip_v) { 5544 #ifdef INET 5545 case IPVERSION: 5546 { 5547 sin->sin_family = AF_INET; 5548 sin->sin_len = sizeof(struct sockaddr_in); 5549 sin->sin_port = sh->src_port; 5550 sin->sin_addr = iph->ip_src; 5551 /* lookup address */ 5552 stc.address[0] = sin->sin_addr.s_addr; 5553 stc.address[1] = 0; 5554 stc.address[2] = 0; 5555 stc.address[3] = 0; 5556 stc.addr_type = SCTP_IPV4_ADDRESS; 5557 /* local from address */ 5558 stc.laddress[0] = to_sin->sin_addr.s_addr; 5559 stc.laddress[1] = 0; 5560 stc.laddress[2] = 0; 5561 stc.laddress[3] = 0; 5562 stc.laddr_type = SCTP_IPV4_ADDRESS; 5563 /* scope_id is only for v6 */ 5564 stc.scope_id = 0; 5565 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE 5566 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 5567 stc.ipv4_scope = 1; 5568 } 5569 #else 5570 stc.ipv4_scope = 1; 5571 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 5572 /* Must use the address in this case */ 5573 if (sctp_is_address_on_local_host((struct sockaddr *)sin, vrf_id)) { 5574 stc.loopback_scope = 1; 5575 stc.ipv4_scope = 1; 5576 stc.site_scope = 1; 5577 stc.local_scope = 0; 5578 } 5579 break; 5580 } 5581 #endif 5582 #ifdef INET6 5583 case IPV6_VERSION >> 4: 5584 { 5585 ip6 = mtod(init_pkt, struct ip6_hdr *); 5586 sin6->sin6_family = AF_INET6; 5587 sin6->sin6_len = sizeof(struct sockaddr_in6); 5588 sin6->sin6_port = sh->src_port; 5589 sin6->sin6_addr = ip6->ip6_src; 5590 /* lookup address */ 5591 memcpy(&stc.address, &sin6->sin6_addr, 5592 sizeof(struct in6_addr)); 5593 sin6->sin6_scope_id = 0; 5594 stc.addr_type = SCTP_IPV6_ADDRESS; 5595 stc.scope_id = 0; 5596 if (sctp_is_address_on_local_host((struct sockaddr *)sin6, vrf_id)) { 5597 /* 5598 * FIX ME: does this have scope from 5599 * rcvif? 5600 */ 5601 (void)sa6_recoverscope(sin6); 5602 stc.scope_id = sin6->sin6_scope_id; 5603 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 5604 stc.loopback_scope = 1; 5605 stc.local_scope = 0; 5606 stc.site_scope = 1; 5607 stc.ipv4_scope = 1; 5608 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5609 /* 5610 * If the new destination is a 5611 * LINK_LOCAL we must have common 5612 * both site and local scope. Don't 5613 * set local scope though since we 5614 * must depend on the source to be 5615 * added implicitly. We cannot 5616 * assure just because we share one 5617 * link that all links are common. 5618 */ 5619 stc.local_scope = 0; 5620 stc.site_scope = 1; 5621 stc.ipv4_scope = 1; 5622 /* 5623 * we start counting for the private 5624 * address stuff at 1. since the 5625 * link local we source from won't 5626 * show up in our scoped count. 5627 */ 5628 cnt_inits_to = 1; 5629 /* 5630 * pull out the scope_id from 5631 * incoming pkt 5632 */ 5633 /* 5634 * FIX ME: does this have scope from 5635 * rcvif? 5636 */ 5637 (void)sa6_recoverscope(sin6); 5638 stc.scope_id = sin6->sin6_scope_id; 5639 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 5640 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 5641 /* 5642 * If the new destination is 5643 * SITE_LOCAL then we must have site 5644 * scope in common. 5645 */ 5646 stc.site_scope = 1; 5647 } 5648 memcpy(&stc.laddress, &to_sin6->sin6_addr, sizeof(struct in6_addr)); 5649 stc.laddr_type = SCTP_IPV6_ADDRESS; 5650 break; 5651 } 5652 #endif 5653 default: 5654 /* TSNH */ 5655 goto do_a_abort; 5656 break; 5657 } 5658 } else { 5659 /* set the scope per the existing tcb */ 5660 5661 #ifdef INET6 5662 struct sctp_nets *lnet; 5663 5664 #endif 5665 5666 stc.loopback_scope = asoc->loopback_scope; 5667 stc.ipv4_scope = asoc->ipv4_local_scope; 5668 stc.site_scope = asoc->site_scope; 5669 stc.local_scope = asoc->local_scope; 5670 #ifdef INET6 5671 /* Why do we not consider IPv4 LL addresses? */ 5672 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { 5673 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) { 5674 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) { 5675 /* 5676 * if we have a LL address, start 5677 * counting at 1. 5678 */ 5679 cnt_inits_to = 1; 5680 } 5681 } 5682 } 5683 #endif 5684 /* use the net pointer */ 5685 to = (struct sockaddr *)&net->ro._l_addr; 5686 switch (to->sa_family) { 5687 #ifdef INET 5688 case AF_INET: 5689 sin = (struct sockaddr_in *)to; 5690 stc.address[0] = sin->sin_addr.s_addr; 5691 stc.address[1] = 0; 5692 stc.address[2] = 0; 5693 stc.address[3] = 0; 5694 stc.addr_type = SCTP_IPV4_ADDRESS; 5695 if (net->src_addr_selected == 0) { 5696 /* 5697 * strange case here, the INIT should have 5698 * did the selection. 5699 */ 5700 net->ro._s_addr = sctp_source_address_selection(inp, 5701 stcb, (sctp_route_t *) & net->ro, 5702 net, 0, vrf_id); 5703 if (net->ro._s_addr == NULL) 5704 return; 5705 5706 net->src_addr_selected = 1; 5707 5708 } 5709 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr; 5710 stc.laddress[1] = 0; 5711 stc.laddress[2] = 0; 5712 stc.laddress[3] = 0; 5713 stc.laddr_type = SCTP_IPV4_ADDRESS; 5714 /* scope_id is only for v6 */ 5715 stc.scope_id = 0; 5716 break; 5717 #endif 5718 #ifdef INET6 5719 case AF_INET6: 5720 sin6 = (struct sockaddr_in6 *)to; 5721 memcpy(&stc.address, &sin6->sin6_addr, 5722 sizeof(struct in6_addr)); 5723 stc.addr_type = SCTP_IPV6_ADDRESS; 5724 stc.scope_id = sin6->sin6_scope_id; 5725 if (net->src_addr_selected == 0) { 5726 /* 5727 * strange case here, the INIT should have 5728 * did the selection. 5729 */ 5730 net->ro._s_addr = sctp_source_address_selection(inp, 5731 stcb, (sctp_route_t *) & net->ro, 5732 net, 0, vrf_id); 5733 if (net->ro._s_addr == NULL) 5734 return; 5735 5736 net->src_addr_selected = 1; 5737 } 5738 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr, 5739 sizeof(struct in6_addr)); 5740 stc.laddr_type = SCTP_IPV6_ADDRESS; 5741 break; 5742 #endif 5743 } 5744 } 5745 /* Now lets put the SCTP header in place */ 5746 initack = mtod(m, struct sctp_init_ack_chunk *); 5747 /* Save it off for quick ref */ 5748 stc.peers_vtag = init_chk->init.initiate_tag; 5749 /* who are we */ 5750 memcpy(stc.identification, SCTP_VERSION_STRING, 5751 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification))); 5752 memset(stc.reserved, 0, SCTP_RESERVE_SPACE); 5753 /* now the chunk header */ 5754 initack->ch.chunk_type = SCTP_INITIATION_ACK; 5755 initack->ch.chunk_flags = 0; 5756 /* fill in later from mbuf we build */ 5757 initack->ch.chunk_length = 0; 5758 /* place in my tag */ 5759 if ((asoc != NULL) && 5760 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 5761 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) || 5762 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) { 5763 /* re-use the v-tags and init-seq here */ 5764 initack->init.initiate_tag = htonl(asoc->my_vtag); 5765 initack->init.initial_tsn = htonl(asoc->init_seq_number); 5766 } else { 5767 uint32_t vtag, itsn; 5768 5769 if (hold_inp_lock) { 5770 SCTP_INP_INCR_REF(inp); 5771 SCTP_INP_RUNLOCK(inp); 5772 } 5773 if (asoc) { 5774 atomic_add_int(&asoc->refcnt, 1); 5775 SCTP_TCB_UNLOCK(stcb); 5776 new_tag: 5777 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); 5778 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) { 5779 /* 5780 * Got a duplicate vtag on some guy behind a 5781 * nat make sure we don't use it. 5782 */ 5783 goto new_tag; 5784 } 5785 initack->init.initiate_tag = htonl(vtag); 5786 /* get a TSN to use too */ 5787 itsn = sctp_select_initial_TSN(&inp->sctp_ep); 5788 initack->init.initial_tsn = htonl(itsn); 5789 SCTP_TCB_LOCK(stcb); 5790 atomic_add_int(&asoc->refcnt, -1); 5791 } else { 5792 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); 5793 initack->init.initiate_tag = htonl(vtag); 5794 /* get a TSN to use too */ 5795 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep)); 5796 } 5797 if (hold_inp_lock) { 5798 SCTP_INP_RLOCK(inp); 5799 SCTP_INP_DECR_REF(inp); 5800 } 5801 } 5802 /* save away my tag to */ 5803 stc.my_vtag = initack->init.initiate_tag; 5804 5805 /* set up some of the credits. */ 5806 so = inp->sctp_socket; 5807 if (so == NULL) { 5808 /* memory problem */ 5809 sctp_m_freem(m); 5810 return; 5811 } else { 5812 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND)); 5813 } 5814 /* set what I want */ 5815 his_limit = ntohs(init_chk->init.num_inbound_streams); 5816 /* choose what I want */ 5817 if (asoc != NULL) { 5818 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) { 5819 i_want = asoc->streamoutcnt; 5820 } else { 5821 i_want = inp->sctp_ep.pre_open_stream_count; 5822 } 5823 } else { 5824 i_want = inp->sctp_ep.pre_open_stream_count; 5825 } 5826 if (his_limit < i_want) { 5827 /* I Want more :< */ 5828 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams; 5829 } else { 5830 /* I can have what I want :> */ 5831 initack->init.num_outbound_streams = htons(i_want); 5832 } 5833 /* tell him his limt. */ 5834 initack->init.num_inbound_streams = 5835 htons(inp->sctp_ep.max_open_streams_intome); 5836 5837 /* adaptation layer indication parameter */ 5838 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack)); 5839 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 5840 ali->ph.param_length = htons(sizeof(*ali)); 5841 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator); 5842 SCTP_BUF_LEN(m) += sizeof(*ali); 5843 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali)); 5844 5845 /* ECN parameter */ 5846 if (((asoc != NULL) && (asoc->ecn_allowed == 1)) || 5847 (inp->sctp_ecn_enable == 1)) { 5848 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE); 5849 ecn->ph.param_length = htons(sizeof(*ecn)); 5850 SCTP_BUF_LEN(m) += sizeof(*ecn); 5851 5852 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn + 5853 sizeof(*ecn)); 5854 } else { 5855 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn); 5856 } 5857 /* And now tell the peer we do pr-sctp */ 5858 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED); 5859 prsctp->ph.param_length = htons(sizeof(*prsctp)); 5860 SCTP_BUF_LEN(m) += sizeof(*prsctp); 5861 if (nat_friendly) { 5862 /* Add NAT friendly parameter */ 5863 struct sctp_paramhdr *ph; 5864 5865 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 5866 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); 5867 ph->param_length = htons(sizeof(struct sctp_paramhdr)); 5868 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr); 5869 } 5870 /* And now tell the peer we do all the extensions */ 5871 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 5872 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 5873 num_ext = 0; 5874 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 5875 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 5876 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 5877 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 5878 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 5879 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) 5880 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 5881 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off)) 5882 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; 5883 p_len = sizeof(*pr_supported) + num_ext; 5884 pr_supported->ph.param_length = htons(p_len); 5885 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len); 5886 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 5887 5888 /* add authentication parameters */ 5889 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) { 5890 struct sctp_auth_random *randp; 5891 struct sctp_auth_hmac_algo *hmacs; 5892 struct sctp_auth_chunk_list *chunks; 5893 uint16_t random_len; 5894 5895 /* generate and add RANDOM parameter */ 5896 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT; 5897 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 5898 randp->ph.param_type = htons(SCTP_RANDOM); 5899 p_len = sizeof(*randp) + random_len; 5900 randp->ph.param_length = htons(p_len); 5901 SCTP_READ_RANDOM(randp->random_data, random_len); 5902 /* zero out any padding required */ 5903 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len); 5904 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 5905 5906 /* add HMAC_ALGO parameter */ 5907 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 5908 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs, 5909 (uint8_t *) hmacs->hmac_ids); 5910 if (p_len > 0) { 5911 p_len += sizeof(*hmacs); 5912 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 5913 hmacs->ph.param_length = htons(p_len); 5914 /* zero out any padding required */ 5915 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len); 5916 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 5917 } 5918 /* add CHUNKS parameter */ 5919 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 5920 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks, 5921 chunks->chunk_types); 5922 if (p_len > 0) { 5923 p_len += sizeof(*chunks); 5924 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 5925 chunks->ph.param_length = htons(p_len); 5926 /* zero out any padding required */ 5927 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len); 5928 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 5929 } 5930 } 5931 m_at = m; 5932 /* now the addresses */ 5933 { 5934 struct sctp_scoping scp; 5935 5936 /* 5937 * To optimize this we could put the scoping stuff into a 5938 * structure and remove the individual uint8's from the stc 5939 * structure. Then we could just sifa in the address within 5940 * the stc.. but for now this is a quick hack to get the 5941 * address stuff teased apart. 5942 */ 5943 scp.ipv4_addr_legal = stc.ipv4_addr_legal; 5944 scp.ipv6_addr_legal = stc.ipv6_addr_legal; 5945 scp.loopback_scope = stc.loopback_scope; 5946 scp.ipv4_local_scope = stc.ipv4_scope; 5947 scp.local_scope = stc.local_scope; 5948 scp.site_scope = stc.site_scope; 5949 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to); 5950 } 5951 5952 /* tack on the operational error if present */ 5953 if (op_err) { 5954 struct mbuf *ol; 5955 int llen; 5956 5957 llen = 0; 5958 ol = op_err; 5959 while (ol) { 5960 llen += SCTP_BUF_LEN(ol); 5961 ol = SCTP_BUF_NEXT(ol); 5962 } 5963 if (llen % 4) { 5964 /* must add a pad to the param */ 5965 uint32_t cpthis = 0; 5966 int padlen; 5967 5968 padlen = 4 - (llen % 4); 5969 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis); 5970 } 5971 while (SCTP_BUF_NEXT(m_at) != NULL) { 5972 m_at = SCTP_BUF_NEXT(m_at); 5973 } 5974 SCTP_BUF_NEXT(m_at) = op_err; 5975 while (SCTP_BUF_NEXT(m_at) != NULL) { 5976 m_at = SCTP_BUF_NEXT(m_at); 5977 } 5978 } 5979 /* pre-calulate the size and update pkt header and chunk header */ 5980 p_len = 0; 5981 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 5982 p_len += SCTP_BUF_LEN(m_tmp); 5983 if (SCTP_BUF_NEXT(m_tmp) == NULL) { 5984 /* m_tmp should now point to last one */ 5985 break; 5986 } 5987 } 5988 5989 /* Now we must build a cookie */ 5990 m_cookie = sctp_add_cookie(inp, init_pkt, offset, m, 0, &stc, &signature); 5991 if (m_cookie == NULL) { 5992 /* memory problem */ 5993 sctp_m_freem(m); 5994 return; 5995 } 5996 /* Now append the cookie to the end and update the space/size */ 5997 SCTP_BUF_NEXT(m_tmp) = m_cookie; 5998 5999 for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 6000 p_len += SCTP_BUF_LEN(m_tmp); 6001 if (SCTP_BUF_NEXT(m_tmp) == NULL) { 6002 /* m_tmp should now point to last one */ 6003 mp_last = m_tmp; 6004 break; 6005 } 6006 } 6007 /* 6008 * Place in the size, but we don't include the last pad (if any) in 6009 * the INIT-ACK. 6010 */ 6011 initack->ch.chunk_length = htons(p_len); 6012 6013 /* 6014 * Time to sign the cookie, we don't sign over the cookie signature 6015 * though thus we set trailer. 6016 */ 6017 (void)sctp_hmac_m(SCTP_HMAC, 6018 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)], 6019 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr), 6020 (uint8_t *) signature, SCTP_SIGNATURE_SIZE); 6021 /* 6022 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return 6023 * here since the timer will drive a retranmission. 6024 */ 6025 padval = p_len % 4; 6026 if ((padval) && (mp_last)) { 6027 /* see my previous comments on mp_last */ 6028 int ret; 6029 6030 ret = sctp_add_pad_tombuf(mp_last, (4 - padval)); 6031 if (ret) { 6032 /* Houston we have a problem, no space */ 6033 sctp_m_freem(m); 6034 return; 6035 } 6036 p_len += padval; 6037 } 6038 if (stc.loopback_scope) { 6039 over_addr = &store1; 6040 } else { 6041 over_addr = NULL; 6042 } 6043 6044 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0, 6045 0, NULL, 0, 6046 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag, 6047 port, SCTP_SO_NOT_LOCKED, over_addr, init_pkt); 6048 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 6049 } 6050 6051 6052 static void 6053 sctp_prune_prsctp(struct sctp_tcb *stcb, 6054 struct sctp_association *asoc, 6055 struct sctp_sndrcvinfo *srcv, 6056 int dataout) 6057 { 6058 int freed_spc = 0; 6059 struct sctp_tmit_chunk *chk, *nchk; 6060 6061 SCTP_TCB_LOCK_ASSERT(stcb); 6062 if ((asoc->peer_supports_prsctp) && 6063 (asoc->sent_queue_cnt_removeable > 0)) { 6064 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 6065 /* 6066 * Look for chunks marked with the PR_SCTP flag AND 6067 * the buffer space flag. If the one being sent is 6068 * equal or greater priority then purge the old one 6069 * and free some space. 6070 */ 6071 if (PR_SCTP_BUF_ENABLED(chk->flags)) { 6072 /* 6073 * This one is PR-SCTP AND buffer space 6074 * limited type 6075 */ 6076 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 6077 /* 6078 * Lower numbers equates to higher 6079 * priority so if the one we are 6080 * looking at has a larger or equal 6081 * priority we want to drop the data 6082 * and NOT retransmit it. 6083 */ 6084 if (chk->data) { 6085 /* 6086 * We release the book_size 6087 * if the mbuf is here 6088 */ 6089 int ret_spc; 6090 int cause; 6091 6092 if (chk->sent > SCTP_DATAGRAM_UNSENT) 6093 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT; 6094 else 6095 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT; 6096 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 6097 cause, 6098 SCTP_SO_LOCKED); 6099 freed_spc += ret_spc; 6100 if (freed_spc >= dataout) { 6101 return; 6102 } 6103 } /* if chunk was present */ 6104 } /* if of sufficent priority */ 6105 } /* if chunk has enabled */ 6106 } /* tailqforeach */ 6107 6108 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 6109 /* Here we must move to the sent queue and mark */ 6110 if (PR_SCTP_BUF_ENABLED(chk->flags)) { 6111 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 6112 if (chk->data) { 6113 /* 6114 * We release the book_size 6115 * if the mbuf is here 6116 */ 6117 int ret_spc; 6118 6119 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 6120 SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT, 6121 SCTP_SO_LOCKED); 6122 6123 freed_spc += ret_spc; 6124 if (freed_spc >= dataout) { 6125 return; 6126 } 6127 } /* end if chk->data */ 6128 } /* end if right class */ 6129 } /* end if chk pr-sctp */ 6130 } /* tailqforeachsafe (chk) */ 6131 } /* if enabled in asoc */ 6132 } 6133 6134 int 6135 sctp_get_frag_point(struct sctp_tcb *stcb, 6136 struct sctp_association *asoc) 6137 { 6138 int siz, ovh; 6139 6140 /* 6141 * For endpoints that have both v6 and v4 addresses we must reserve 6142 * room for the ipv6 header, for those that are only dealing with V4 6143 * we use a larger frag point. 6144 */ 6145 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 6146 ovh = SCTP_MED_OVERHEAD; 6147 } else { 6148 ovh = SCTP_MED_V4_OVERHEAD; 6149 } 6150 6151 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu) 6152 siz = asoc->smallest_mtu - ovh; 6153 else 6154 siz = (stcb->asoc.sctp_frag_point - ovh); 6155 /* 6156 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) { 6157 */ 6158 /* A data chunk MUST fit in a cluster */ 6159 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */ 6160 /* } */ 6161 6162 /* adjust for an AUTH chunk if DATA requires auth */ 6163 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) 6164 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 6165 6166 if (siz % 4) { 6167 /* make it an even word boundary please */ 6168 siz -= (siz % 4); 6169 } 6170 return (siz); 6171 } 6172 6173 static void 6174 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp) 6175 { 6176 sp->pr_sctp_on = 0; 6177 /* 6178 * We assume that the user wants PR_SCTP_TTL if the user provides a 6179 * positive lifetime but does not specify any PR_SCTP policy. This 6180 * is a BAD assumption and causes problems at least with the 6181 * U-Vancovers MPI folks. I will change this to be no policy means 6182 * NO PR-SCTP. 6183 */ 6184 if (PR_SCTP_ENABLED(sp->sinfo_flags)) { 6185 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); 6186 sp->pr_sctp_on = 1; 6187 } else { 6188 return; 6189 } 6190 switch (PR_SCTP_POLICY(sp->sinfo_flags)) { 6191 case CHUNK_FLAGS_PR_SCTP_BUF: 6192 /* 6193 * Time to live is a priority stored in tv_sec when doing 6194 * the buffer drop thing. 6195 */ 6196 sp->ts.tv_sec = sp->timetolive; 6197 sp->ts.tv_usec = 0; 6198 break; 6199 case CHUNK_FLAGS_PR_SCTP_TTL: 6200 { 6201 struct timeval tv; 6202 6203 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 6204 tv.tv_sec = sp->timetolive / 1000; 6205 tv.tv_usec = (sp->timetolive * 1000) % 1000000; 6206 /* 6207 * TODO sctp_constants.h needs alternative time 6208 * macros when _KERNEL is undefined. 6209 */ 6210 timevaladd(&sp->ts, &tv); 6211 } 6212 break; 6213 case CHUNK_FLAGS_PR_SCTP_RTX: 6214 /* 6215 * Time to live is a the number or retransmissions stored in 6216 * tv_sec. 6217 */ 6218 sp->ts.tv_sec = sp->timetolive; 6219 sp->ts.tv_usec = 0; 6220 break; 6221 default: 6222 SCTPDBG(SCTP_DEBUG_USRREQ1, 6223 "Unknown PR_SCTP policy %u.\n", 6224 PR_SCTP_POLICY(sp->sinfo_flags)); 6225 break; 6226 } 6227 } 6228 6229 static int 6230 sctp_msg_append(struct sctp_tcb *stcb, 6231 struct sctp_nets *net, 6232 struct mbuf *m, 6233 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock) 6234 { 6235 int error = 0, holds_lock; 6236 struct mbuf *at; 6237 struct sctp_stream_queue_pending *sp = NULL; 6238 struct sctp_stream_out *strm; 6239 6240 /* 6241 * Given an mbuf chain, put it into the association send queue and 6242 * place it on the wheel 6243 */ 6244 holds_lock = hold_stcb_lock; 6245 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) { 6246 /* Invalid stream number */ 6247 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 6248 error = EINVAL; 6249 goto out_now; 6250 } 6251 if ((stcb->asoc.stream_locked) && 6252 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) { 6253 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 6254 error = EINVAL; 6255 goto out_now; 6256 } 6257 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 6258 /* Now can we send this? */ 6259 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) || 6260 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 6261 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 6262 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) { 6263 /* got data while shutting down */ 6264 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 6265 error = ECONNRESET; 6266 goto out_now; 6267 } 6268 sctp_alloc_a_strmoq(stcb, sp); 6269 if (sp == NULL) { 6270 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6271 error = ENOMEM; 6272 goto out_now; 6273 } 6274 sp->sinfo_flags = srcv->sinfo_flags; 6275 sp->timetolive = srcv->sinfo_timetolive; 6276 sp->ppid = srcv->sinfo_ppid; 6277 sp->context = srcv->sinfo_context; 6278 sp->strseq = 0; 6279 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 6280 sp->net = net; 6281 atomic_add_int(&sp->net->ref_count, 1); 6282 } else { 6283 sp->net = NULL; 6284 } 6285 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 6286 sp->stream = srcv->sinfo_stream; 6287 sp->msg_is_complete = 1; 6288 sp->sender_all_done = 1; 6289 sp->some_taken = 0; 6290 sp->data = m; 6291 sp->tail_mbuf = NULL; 6292 sctp_set_prsctp_policy(sp); 6293 /* 6294 * We could in theory (for sendall) sifa the length in, but we would 6295 * still have to hunt through the chain since we need to setup the 6296 * tail_mbuf 6297 */ 6298 sp->length = 0; 6299 for (at = m; at; at = SCTP_BUF_NEXT(at)) { 6300 if (SCTP_BUF_NEXT(at) == NULL) 6301 sp->tail_mbuf = at; 6302 sp->length += SCTP_BUF_LEN(at); 6303 } 6304 if (srcv->sinfo_keynumber_valid) { 6305 sp->auth_keyid = srcv->sinfo_keynumber; 6306 } else { 6307 sp->auth_keyid = stcb->asoc.authinfo.active_keyid; 6308 } 6309 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { 6310 sctp_auth_key_acquire(stcb, sp->auth_keyid); 6311 sp->holds_key_ref = 1; 6312 } 6313 SCTP_TCB_SEND_LOCK(stcb); 6314 sctp_snd_sb_alloc(stcb, sp->length); 6315 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1); 6316 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 6317 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) { 6318 sp->strseq = strm->next_sequence_sent; 6319 strm->next_sequence_sent++; 6320 } 6321 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1); 6322 m = NULL; 6323 SCTP_TCB_SEND_UNLOCK(stcb); 6324 out_now: 6325 if (m) { 6326 sctp_m_freem(m); 6327 } 6328 return (error); 6329 } 6330 6331 6332 static struct mbuf * 6333 sctp_copy_mbufchain(struct mbuf *clonechain, 6334 struct mbuf *outchain, 6335 struct mbuf **endofchain, 6336 int can_take_mbuf, 6337 int sizeofcpy, 6338 uint8_t copy_by_ref) 6339 { 6340 struct mbuf *m; 6341 struct mbuf *appendchain; 6342 caddr_t cp; 6343 int len; 6344 6345 if (endofchain == NULL) { 6346 /* error */ 6347 error_out: 6348 if (outchain) 6349 sctp_m_freem(outchain); 6350 return (NULL); 6351 } 6352 if (can_take_mbuf) { 6353 appendchain = clonechain; 6354 } else { 6355 if (!copy_by_ref && 6356 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN))) 6357 ) { 6358 /* Its not in a cluster */ 6359 if (*endofchain == NULL) { 6360 /* lets get a mbuf cluster */ 6361 if (outchain == NULL) { 6362 /* This is the general case */ 6363 new_mbuf: 6364 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER); 6365 if (outchain == NULL) { 6366 goto error_out; 6367 } 6368 SCTP_BUF_LEN(outchain) = 0; 6369 *endofchain = outchain; 6370 /* get the prepend space */ 6371 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4)); 6372 } else { 6373 /* 6374 * We really should not get a NULL 6375 * in endofchain 6376 */ 6377 /* find end */ 6378 m = outchain; 6379 while (m) { 6380 if (SCTP_BUF_NEXT(m) == NULL) { 6381 *endofchain = m; 6382 break; 6383 } 6384 m = SCTP_BUF_NEXT(m); 6385 } 6386 /* sanity */ 6387 if (*endofchain == NULL) { 6388 /* 6389 * huh, TSNH XXX maybe we 6390 * should panic 6391 */ 6392 sctp_m_freem(outchain); 6393 goto new_mbuf; 6394 } 6395 } 6396 /* get the new end of length */ 6397 len = M_TRAILINGSPACE(*endofchain); 6398 } else { 6399 /* how much is left at the end? */ 6400 len = M_TRAILINGSPACE(*endofchain); 6401 } 6402 /* Find the end of the data, for appending */ 6403 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain))); 6404 6405 /* Now lets copy it out */ 6406 if (len >= sizeofcpy) { 6407 /* It all fits, copy it in */ 6408 m_copydata(clonechain, 0, sizeofcpy, cp); 6409 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 6410 } else { 6411 /* fill up the end of the chain */ 6412 if (len > 0) { 6413 m_copydata(clonechain, 0, len, cp); 6414 SCTP_BUF_LEN((*endofchain)) += len; 6415 /* now we need another one */ 6416 sizeofcpy -= len; 6417 } 6418 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER); 6419 if (m == NULL) { 6420 /* We failed */ 6421 goto error_out; 6422 } 6423 SCTP_BUF_NEXT((*endofchain)) = m; 6424 *endofchain = m; 6425 cp = mtod((*endofchain), caddr_t); 6426 m_copydata(clonechain, len, sizeofcpy, cp); 6427 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 6428 } 6429 return (outchain); 6430 } else { 6431 /* copy the old fashion way */ 6432 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT); 6433 #ifdef SCTP_MBUF_LOGGING 6434 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 6435 struct mbuf *mat; 6436 6437 mat = appendchain; 6438 while (mat) { 6439 if (SCTP_BUF_IS_EXTENDED(mat)) { 6440 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 6441 } 6442 mat = SCTP_BUF_NEXT(mat); 6443 } 6444 } 6445 #endif 6446 } 6447 } 6448 if (appendchain == NULL) { 6449 /* error */ 6450 if (outchain) 6451 sctp_m_freem(outchain); 6452 return (NULL); 6453 } 6454 if (outchain) { 6455 /* tack on to the end */ 6456 if (*endofchain != NULL) { 6457 SCTP_BUF_NEXT(((*endofchain))) = appendchain; 6458 } else { 6459 m = outchain; 6460 while (m) { 6461 if (SCTP_BUF_NEXT(m) == NULL) { 6462 SCTP_BUF_NEXT(m) = appendchain; 6463 break; 6464 } 6465 m = SCTP_BUF_NEXT(m); 6466 } 6467 } 6468 /* 6469 * save off the end and update the end-chain postion 6470 */ 6471 m = appendchain; 6472 while (m) { 6473 if (SCTP_BUF_NEXT(m) == NULL) { 6474 *endofchain = m; 6475 break; 6476 } 6477 m = SCTP_BUF_NEXT(m); 6478 } 6479 return (outchain); 6480 } else { 6481 /* save off the end and update the end-chain postion */ 6482 m = appendchain; 6483 while (m) { 6484 if (SCTP_BUF_NEXT(m) == NULL) { 6485 *endofchain = m; 6486 break; 6487 } 6488 m = SCTP_BUF_NEXT(m); 6489 } 6490 return (appendchain); 6491 } 6492 } 6493 6494 int 6495 sctp_med_chunk_output(struct sctp_inpcb *inp, 6496 struct sctp_tcb *stcb, 6497 struct sctp_association *asoc, 6498 int *num_out, 6499 int *reason_code, 6500 int control_only, int from_where, 6501 struct timeval *now, int *now_filled, int frag_point, int so_locked 6502 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 6503 SCTP_UNUSED 6504 #endif 6505 ); 6506 6507 static void 6508 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr, 6509 uint32_t val) 6510 { 6511 struct sctp_copy_all *ca; 6512 struct mbuf *m; 6513 int ret = 0; 6514 int added_control = 0; 6515 int un_sent, do_chunk_output = 1; 6516 struct sctp_association *asoc; 6517 struct sctp_nets *net; 6518 6519 ca = (struct sctp_copy_all *)ptr; 6520 if (ca->m == NULL) { 6521 return; 6522 } 6523 if (ca->inp != inp) { 6524 /* TSNH */ 6525 return; 6526 } 6527 if ((ca->m) && ca->sndlen) { 6528 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT); 6529 if (m == NULL) { 6530 /* can't copy so we are done */ 6531 ca->cnt_failed++; 6532 return; 6533 } 6534 #ifdef SCTP_MBUF_LOGGING 6535 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 6536 struct mbuf *mat; 6537 6538 mat = m; 6539 while (mat) { 6540 if (SCTP_BUF_IS_EXTENDED(mat)) { 6541 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 6542 } 6543 mat = SCTP_BUF_NEXT(mat); 6544 } 6545 } 6546 #endif 6547 } else { 6548 m = NULL; 6549 } 6550 SCTP_TCB_LOCK_ASSERT(stcb); 6551 if (stcb->asoc.alternate) { 6552 net = stcb->asoc.alternate; 6553 } else { 6554 net = stcb->asoc.primary_destination; 6555 } 6556 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) { 6557 /* Abort this assoc with m as the user defined reason */ 6558 if (m) { 6559 struct sctp_paramhdr *ph; 6560 6561 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_DONTWAIT); 6562 if (m) { 6563 ph = mtod(m, struct sctp_paramhdr *); 6564 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 6565 ph->param_length = htons(ca->sndlen); 6566 } 6567 /* 6568 * We add one here to keep the assoc from 6569 * dis-appearing on us. 6570 */ 6571 atomic_add_int(&stcb->asoc.refcnt, 1); 6572 sctp_abort_an_association(inp, stcb, 6573 SCTP_RESPONSE_TO_USER_REQ, 6574 m, SCTP_SO_NOT_LOCKED); 6575 /* 6576 * sctp_abort_an_association calls sctp_free_asoc() 6577 * free association will NOT free it since we 6578 * incremented the refcnt .. we do this to prevent 6579 * it being freed and things getting tricky since we 6580 * could end up (from free_asoc) calling inpcb_free 6581 * which would get a recursive lock call to the 6582 * iterator lock.. But as a consequence of that the 6583 * stcb will return to us un-locked.. since 6584 * free_asoc returns with either no TCB or the TCB 6585 * unlocked, we must relock.. to unlock in the 6586 * iterator timer :-0 6587 */ 6588 SCTP_TCB_LOCK(stcb); 6589 atomic_add_int(&stcb->asoc.refcnt, -1); 6590 goto no_chunk_output; 6591 } 6592 } else { 6593 if (m) { 6594 ret = sctp_msg_append(stcb, net, m, 6595 &ca->sndrcv, 1); 6596 } 6597 asoc = &stcb->asoc; 6598 if (ca->sndrcv.sinfo_flags & SCTP_EOF) { 6599 /* shutdown this assoc */ 6600 int cnt; 6601 6602 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED); 6603 6604 if (TAILQ_EMPTY(&asoc->send_queue) && 6605 TAILQ_EMPTY(&asoc->sent_queue) && 6606 (cnt == 0)) { 6607 if (asoc->locked_on_sending) { 6608 goto abort_anyway; 6609 } 6610 /* 6611 * there is nothing queued to send, so I'm 6612 * done... 6613 */ 6614 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 6615 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 6616 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 6617 /* 6618 * only send SHUTDOWN the first time 6619 * through 6620 */ 6621 sctp_send_shutdown(stcb, net); 6622 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 6623 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 6624 } 6625 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 6626 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 6627 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 6628 net); 6629 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 6630 asoc->primary_destination); 6631 added_control = 1; 6632 do_chunk_output = 0; 6633 } 6634 } else { 6635 /* 6636 * we still got (or just got) data to send, 6637 * so set SHUTDOWN_PENDING 6638 */ 6639 /* 6640 * XXX sockets draft says that SCTP_EOF 6641 * should be sent with no data. currently, 6642 * we will allow user data to be sent first 6643 * and move to SHUTDOWN-PENDING 6644 */ 6645 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 6646 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 6647 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 6648 if (asoc->locked_on_sending) { 6649 /* 6650 * Locked to send out the 6651 * data 6652 */ 6653 struct sctp_stream_queue_pending *sp; 6654 6655 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 6656 if (sp) { 6657 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 6658 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 6659 } 6660 } 6661 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 6662 if (TAILQ_EMPTY(&asoc->send_queue) && 6663 TAILQ_EMPTY(&asoc->sent_queue) && 6664 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 6665 abort_anyway: 6666 atomic_add_int(&stcb->asoc.refcnt, 1); 6667 sctp_abort_an_association(stcb->sctp_ep, stcb, 6668 SCTP_RESPONSE_TO_USER_REQ, 6669 NULL, SCTP_SO_NOT_LOCKED); 6670 atomic_add_int(&stcb->asoc.refcnt, -1); 6671 goto no_chunk_output; 6672 } 6673 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 6674 asoc->primary_destination); 6675 } 6676 } 6677 6678 } 6679 } 6680 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 6681 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 6682 6683 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 6684 (stcb->asoc.total_flight > 0) && 6685 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) 6686 ) { 6687 do_chunk_output = 0; 6688 } 6689 if (do_chunk_output) 6690 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED); 6691 else if (added_control) { 6692 int num_out = 0, reason = 0, now_filled = 0; 6693 struct timeval now; 6694 int frag_point; 6695 6696 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 6697 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 6698 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED); 6699 } 6700 no_chunk_output: 6701 if (ret) { 6702 ca->cnt_failed++; 6703 } else { 6704 ca->cnt_sent++; 6705 } 6706 } 6707 6708 static void 6709 sctp_sendall_completes(void *ptr, uint32_t val) 6710 { 6711 struct sctp_copy_all *ca; 6712 6713 ca = (struct sctp_copy_all *)ptr; 6714 /* 6715 * Do a notify here? Kacheong suggests that the notify be done at 6716 * the send time.. so you would push up a notification if any send 6717 * failed. Don't know if this is feasable since the only failures we 6718 * have is "memory" related and if you cannot get an mbuf to send 6719 * the data you surely can't get an mbuf to send up to notify the 6720 * user you can't send the data :-> 6721 */ 6722 6723 /* now free everything */ 6724 sctp_m_freem(ca->m); 6725 SCTP_FREE(ca, SCTP_M_COPYAL); 6726 } 6727 6728 6729 #define MC_ALIGN(m, len) do { \ 6730 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \ 6731 } while (0) 6732 6733 6734 6735 static struct mbuf * 6736 sctp_copy_out_all(struct uio *uio, int len) 6737 { 6738 struct mbuf *ret, *at; 6739 int left, willcpy, cancpy, error; 6740 6741 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA); 6742 if (ret == NULL) { 6743 /* TSNH */ 6744 return (NULL); 6745 } 6746 left = len; 6747 SCTP_BUF_LEN(ret) = 0; 6748 /* save space for the data chunk header */ 6749 cancpy = M_TRAILINGSPACE(ret); 6750 willcpy = min(cancpy, left); 6751 at = ret; 6752 while (left > 0) { 6753 /* Align data to the end */ 6754 error = uiomove(mtod(at, caddr_t), willcpy, uio); 6755 if (error) { 6756 err_out_now: 6757 sctp_m_freem(at); 6758 return (NULL); 6759 } 6760 SCTP_BUF_LEN(at) = willcpy; 6761 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0; 6762 left -= willcpy; 6763 if (left > 0) { 6764 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA); 6765 if (SCTP_BUF_NEXT(at) == NULL) { 6766 goto err_out_now; 6767 } 6768 at = SCTP_BUF_NEXT(at); 6769 SCTP_BUF_LEN(at) = 0; 6770 cancpy = M_TRAILINGSPACE(at); 6771 willcpy = min(cancpy, left); 6772 } 6773 } 6774 return (ret); 6775 } 6776 6777 static int 6778 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m, 6779 struct sctp_sndrcvinfo *srcv) 6780 { 6781 int ret; 6782 struct sctp_copy_all *ca; 6783 6784 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all), 6785 SCTP_M_COPYAL); 6786 if (ca == NULL) { 6787 sctp_m_freem(m); 6788 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6789 return (ENOMEM); 6790 } 6791 memset(ca, 0, sizeof(struct sctp_copy_all)); 6792 6793 ca->inp = inp; 6794 if (srcv) { 6795 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo)); 6796 } 6797 /* 6798 * take off the sendall flag, it would be bad if we failed to do 6799 * this :-0 6800 */ 6801 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL; 6802 /* get length and mbuf chain */ 6803 if (uio) { 6804 ca->sndlen = uio->uio_resid; 6805 ca->m = sctp_copy_out_all(uio, ca->sndlen); 6806 if (ca->m == NULL) { 6807 SCTP_FREE(ca, SCTP_M_COPYAL); 6808 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6809 return (ENOMEM); 6810 } 6811 } else { 6812 /* Gather the length of the send */ 6813 struct mbuf *mat; 6814 6815 mat = m; 6816 ca->sndlen = 0; 6817 while (m) { 6818 ca->sndlen += SCTP_BUF_LEN(m); 6819 m = SCTP_BUF_NEXT(m); 6820 } 6821 ca->m = mat; 6822 } 6823 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL, 6824 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES, 6825 SCTP_ASOC_ANY_STATE, 6826 (void *)ca, 0, 6827 sctp_sendall_completes, inp, 1); 6828 if (ret) { 6829 SCTP_PRINTF("Failed to initiate iterator for sendall\n"); 6830 SCTP_FREE(ca, SCTP_M_COPYAL); 6831 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); 6832 return (EFAULT); 6833 } 6834 return (0); 6835 } 6836 6837 6838 void 6839 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc) 6840 { 6841 struct sctp_tmit_chunk *chk, *nchk; 6842 6843 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 6844 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 6845 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 6846 if (chk->data) { 6847 sctp_m_freem(chk->data); 6848 chk->data = NULL; 6849 } 6850 asoc->ctrl_queue_cnt--; 6851 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6852 } 6853 } 6854 } 6855 6856 void 6857 sctp_toss_old_asconf(struct sctp_tcb *stcb) 6858 { 6859 struct sctp_association *asoc; 6860 struct sctp_tmit_chunk *chk, *nchk; 6861 struct sctp_asconf_chunk *acp; 6862 6863 asoc = &stcb->asoc; 6864 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 6865 /* find SCTP_ASCONF chunk in queue */ 6866 if (chk->rec.chunk_id.id == SCTP_ASCONF) { 6867 if (chk->data) { 6868 acp = mtod(chk->data, struct sctp_asconf_chunk *); 6869 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) { 6870 /* Not Acked yet */ 6871 break; 6872 } 6873 } 6874 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 6875 if (chk->data) { 6876 sctp_m_freem(chk->data); 6877 chk->data = NULL; 6878 } 6879 asoc->ctrl_queue_cnt--; 6880 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6881 } 6882 } 6883 } 6884 6885 6886 static void 6887 sctp_clean_up_datalist(struct sctp_tcb *stcb, 6888 struct sctp_association *asoc, 6889 struct sctp_tmit_chunk **data_list, 6890 int bundle_at, 6891 struct sctp_nets *net) 6892 { 6893 int i; 6894 struct sctp_tmit_chunk *tp1; 6895 6896 for (i = 0; i < bundle_at; i++) { 6897 /* off of the send queue */ 6898 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next); 6899 asoc->send_queue_cnt--; 6900 if (i > 0) { 6901 /* 6902 * Any chunk NOT 0 you zap the time chunk 0 gets 6903 * zapped or set based on if a RTO measurment is 6904 * needed. 6905 */ 6906 data_list[i]->do_rtt = 0; 6907 } 6908 /* record time */ 6909 data_list[i]->sent_rcv_time = net->last_sent_time; 6910 data_list[i]->rec.data.cwnd_at_send = net->cwnd; 6911 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq; 6912 if (data_list[i]->whoTo == NULL) { 6913 data_list[i]->whoTo = net; 6914 atomic_add_int(&net->ref_count, 1); 6915 } 6916 /* on to the sent queue */ 6917 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead); 6918 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { 6919 struct sctp_tmit_chunk *tpp; 6920 6921 /* need to move back */ 6922 back_up_more: 6923 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next); 6924 if (tpp == NULL) { 6925 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next); 6926 goto all_done; 6927 } 6928 tp1 = tpp; 6929 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { 6930 goto back_up_more; 6931 } 6932 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next); 6933 } else { 6934 TAILQ_INSERT_TAIL(&asoc->sent_queue, 6935 data_list[i], 6936 sctp_next); 6937 } 6938 all_done: 6939 /* This does not lower until the cum-ack passes it */ 6940 asoc->sent_queue_cnt++; 6941 if ((asoc->peers_rwnd <= 0) && 6942 (asoc->total_flight == 0) && 6943 (bundle_at == 1)) { 6944 /* Mark the chunk as being a window probe */ 6945 SCTP_STAT_INCR(sctps_windowprobed); 6946 } 6947 #ifdef SCTP_AUDITING_ENABLED 6948 sctp_audit_log(0xC2, 3); 6949 #endif 6950 data_list[i]->sent = SCTP_DATAGRAM_SENT; 6951 data_list[i]->snd_count = 1; 6952 data_list[i]->rec.data.chunk_was_revoked = 0; 6953 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 6954 sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 6955 data_list[i]->whoTo->flight_size, 6956 data_list[i]->book_size, 6957 (uintptr_t) data_list[i]->whoTo, 6958 data_list[i]->rec.data.TSN_seq); 6959 } 6960 sctp_flight_size_increase(data_list[i]); 6961 sctp_total_flight_increase(stcb, data_list[i]); 6962 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { 6963 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 6964 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); 6965 } 6966 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 6967 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); 6968 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 6969 /* SWS sender side engages */ 6970 asoc->peers_rwnd = 0; 6971 } 6972 } 6973 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) { 6974 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net); 6975 } 6976 } 6977 6978 static void 6979 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked 6980 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 6981 SCTP_UNUSED 6982 #endif 6983 ) 6984 { 6985 struct sctp_tmit_chunk *chk, *nchk; 6986 6987 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 6988 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 6989 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ 6990 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 6991 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 6992 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) || 6993 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 6994 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 6995 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 6996 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 6997 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 6998 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 6999 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 7000 /* Stray chunks must be cleaned up */ 7001 clean_up_anyway: 7002 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 7003 if (chk->data) { 7004 sctp_m_freem(chk->data); 7005 chk->data = NULL; 7006 } 7007 asoc->ctrl_queue_cnt--; 7008 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) 7009 asoc->fwd_tsn_cnt--; 7010 sctp_free_a_chunk(stcb, chk, so_locked); 7011 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 7012 /* special handling, we must look into the param */ 7013 if (chk != asoc->str_reset) { 7014 goto clean_up_anyway; 7015 } 7016 } 7017 } 7018 } 7019 7020 7021 static int 7022 sctp_can_we_split_this(struct sctp_tcb *stcb, 7023 uint32_t length, 7024 uint32_t goal_mtu, uint32_t frag_point, int eeor_on) 7025 { 7026 /* 7027 * Make a decision on if I should split a msg into multiple parts. 7028 * This is only asked of incomplete messages. 7029 */ 7030 if (eeor_on) { 7031 /* 7032 * If we are doing EEOR we need to always send it if its the 7033 * entire thing, since it might be all the guy is putting in 7034 * the hopper. 7035 */ 7036 if (goal_mtu >= length) { 7037 /*- 7038 * If we have data outstanding, 7039 * we get another chance when the sack 7040 * arrives to transmit - wait for more data 7041 */ 7042 if (stcb->asoc.total_flight == 0) { 7043 /* 7044 * If nothing is in flight, we zero the 7045 * packet counter. 7046 */ 7047 return (length); 7048 } 7049 return (0); 7050 7051 } else { 7052 /* You can fill the rest */ 7053 return (goal_mtu); 7054 } 7055 } 7056 /*- 7057 * For those strange folk that make the send buffer 7058 * smaller than our fragmentation point, we can't 7059 * get a full msg in so we have to allow splitting. 7060 */ 7061 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) { 7062 return (length); 7063 } 7064 if ((length <= goal_mtu) || 7065 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) { 7066 /* Sub-optimial residual don't split in non-eeor mode. */ 7067 return (0); 7068 } 7069 /* 7070 * If we reach here length is larger than the goal_mtu. Do we wish 7071 * to split it for the sake of packet putting together? 7072 */ 7073 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) { 7074 /* Its ok to split it */ 7075 return (min(goal_mtu, frag_point)); 7076 } 7077 /* Nope, can't split */ 7078 return (0); 7079 7080 } 7081 7082 static uint32_t 7083 sctp_move_to_outqueue(struct sctp_tcb *stcb, 7084 struct sctp_stream_out *strq, 7085 uint32_t goal_mtu, 7086 uint32_t frag_point, 7087 int *locked, 7088 int *giveup, 7089 int eeor_mode, 7090 int *bail, 7091 int so_locked 7092 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7093 SCTP_UNUSED 7094 #endif 7095 ) 7096 { 7097 /* Move from the stream to the send_queue keeping track of the total */ 7098 struct sctp_association *asoc; 7099 struct sctp_stream_queue_pending *sp; 7100 struct sctp_tmit_chunk *chk; 7101 struct sctp_data_chunk *dchkh; 7102 uint32_t to_move, length; 7103 uint8_t rcv_flags = 0; 7104 uint8_t some_taken; 7105 uint8_t send_lock_up = 0; 7106 7107 SCTP_TCB_LOCK_ASSERT(stcb); 7108 asoc = &stcb->asoc; 7109 one_more_time: 7110 /* sa_ignore FREED_MEMORY */ 7111 sp = TAILQ_FIRST(&strq->outqueue); 7112 if (sp == NULL) { 7113 *locked = 0; 7114 if (send_lock_up == 0) { 7115 SCTP_TCB_SEND_LOCK(stcb); 7116 send_lock_up = 1; 7117 } 7118 sp = TAILQ_FIRST(&strq->outqueue); 7119 if (sp) { 7120 goto one_more_time; 7121 } 7122 if (strq->last_msg_incomplete) { 7123 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n", 7124 strq->stream_no, 7125 strq->last_msg_incomplete); 7126 strq->last_msg_incomplete = 0; 7127 } 7128 to_move = 0; 7129 if (send_lock_up) { 7130 SCTP_TCB_SEND_UNLOCK(stcb); 7131 send_lock_up = 0; 7132 } 7133 goto out_of; 7134 } 7135 if ((sp->msg_is_complete) && (sp->length == 0)) { 7136 if (sp->sender_all_done) { 7137 /* 7138 * We are doing differed cleanup. Last time through 7139 * when we took all the data the sender_all_done was 7140 * not set. 7141 */ 7142 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) { 7143 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n"); 7144 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 7145 sp->sender_all_done, 7146 sp->length, 7147 sp->msg_is_complete, 7148 sp->put_last_out, 7149 send_lock_up); 7150 } 7151 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) { 7152 SCTP_TCB_SEND_LOCK(stcb); 7153 send_lock_up = 1; 7154 } 7155 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 7156 TAILQ_REMOVE(&strq->outqueue, sp, next); 7157 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); 7158 if (sp->net) { 7159 sctp_free_remote_addr(sp->net); 7160 sp->net = NULL; 7161 } 7162 if (sp->data) { 7163 sctp_m_freem(sp->data); 7164 sp->data = NULL; 7165 } 7166 sctp_free_a_strmoq(stcb, sp, so_locked); 7167 /* we can't be locked to it */ 7168 *locked = 0; 7169 stcb->asoc.locked_on_sending = NULL; 7170 if (send_lock_up) { 7171 SCTP_TCB_SEND_UNLOCK(stcb); 7172 send_lock_up = 0; 7173 } 7174 /* back to get the next msg */ 7175 goto one_more_time; 7176 } else { 7177 /* 7178 * sender just finished this but still holds a 7179 * reference 7180 */ 7181 *locked = 1; 7182 *giveup = 1; 7183 to_move = 0; 7184 goto out_of; 7185 } 7186 } else { 7187 /* is there some to get */ 7188 if (sp->length == 0) { 7189 /* no */ 7190 *locked = 1; 7191 *giveup = 1; 7192 to_move = 0; 7193 goto out_of; 7194 } else if (sp->discard_rest) { 7195 if (send_lock_up == 0) { 7196 SCTP_TCB_SEND_LOCK(stcb); 7197 send_lock_up = 1; 7198 } 7199 /* Whack down the size */ 7200 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length); 7201 if ((stcb->sctp_socket != NULL) && \ 7202 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 7203 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { 7204 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length); 7205 } 7206 if (sp->data) { 7207 sctp_m_freem(sp->data); 7208 sp->data = NULL; 7209 sp->tail_mbuf = NULL; 7210 } 7211 sp->length = 0; 7212 sp->some_taken = 1; 7213 *locked = 1; 7214 *giveup = 1; 7215 to_move = 0; 7216 goto out_of; 7217 } 7218 } 7219 some_taken = sp->some_taken; 7220 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) { 7221 sp->msg_is_complete = 1; 7222 } 7223 re_look: 7224 length = sp->length; 7225 if (sp->msg_is_complete) { 7226 /* The message is complete */ 7227 to_move = min(length, frag_point); 7228 if (to_move == length) { 7229 /* All of it fits in the MTU */ 7230 if (sp->some_taken) { 7231 rcv_flags |= SCTP_DATA_LAST_FRAG; 7232 sp->put_last_out = 1; 7233 } else { 7234 rcv_flags |= SCTP_DATA_NOT_FRAG; 7235 sp->put_last_out = 1; 7236 } 7237 } else { 7238 /* Not all of it fits, we fragment */ 7239 if (sp->some_taken == 0) { 7240 rcv_flags |= SCTP_DATA_FIRST_FRAG; 7241 } 7242 sp->some_taken = 1; 7243 } 7244 } else { 7245 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode); 7246 if (to_move) { 7247 /*- 7248 * We use a snapshot of length in case it 7249 * is expanding during the compare. 7250 */ 7251 uint32_t llen; 7252 7253 llen = length; 7254 if (to_move >= llen) { 7255 to_move = llen; 7256 if (send_lock_up == 0) { 7257 /*- 7258 * We are taking all of an incomplete msg 7259 * thus we need a send lock. 7260 */ 7261 SCTP_TCB_SEND_LOCK(stcb); 7262 send_lock_up = 1; 7263 if (sp->msg_is_complete) { 7264 /* 7265 * the sender finished the 7266 * msg 7267 */ 7268 goto re_look; 7269 } 7270 } 7271 } 7272 if (sp->some_taken == 0) { 7273 rcv_flags |= SCTP_DATA_FIRST_FRAG; 7274 sp->some_taken = 1; 7275 } 7276 } else { 7277 /* Nothing to take. */ 7278 if (sp->some_taken) { 7279 *locked = 1; 7280 } 7281 *giveup = 1; 7282 to_move = 0; 7283 goto out_of; 7284 } 7285 } 7286 7287 /* If we reach here, we can copy out a chunk */ 7288 sctp_alloc_a_chunk(stcb, chk); 7289 if (chk == NULL) { 7290 /* No chunk memory */ 7291 *giveup = 1; 7292 to_move = 0; 7293 goto out_of; 7294 } 7295 /* 7296 * Setup for unordered if needed by looking at the user sent info 7297 * flags. 7298 */ 7299 if (sp->sinfo_flags & SCTP_UNORDERED) { 7300 rcv_flags |= SCTP_DATA_UNORDERED; 7301 } 7302 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) || 7303 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) { 7304 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY; 7305 } 7306 /* clear out the chunk before setting up */ 7307 memset(chk, 0, sizeof(*chk)); 7308 chk->rec.data.rcv_flags = rcv_flags; 7309 7310 if (to_move >= length) { 7311 /* we think we can steal the whole thing */ 7312 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) { 7313 SCTP_TCB_SEND_LOCK(stcb); 7314 send_lock_up = 1; 7315 } 7316 if (to_move < sp->length) { 7317 /* bail, it changed */ 7318 goto dont_do_it; 7319 } 7320 chk->data = sp->data; 7321 chk->last_mbuf = sp->tail_mbuf; 7322 /* register the stealing */ 7323 sp->data = sp->tail_mbuf = NULL; 7324 } else { 7325 struct mbuf *m; 7326 7327 dont_do_it: 7328 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT); 7329 chk->last_mbuf = NULL; 7330 if (chk->data == NULL) { 7331 sp->some_taken = some_taken; 7332 sctp_free_a_chunk(stcb, chk, so_locked); 7333 *bail = 1; 7334 to_move = 0; 7335 goto out_of; 7336 } 7337 #ifdef SCTP_MBUF_LOGGING 7338 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 7339 struct mbuf *mat; 7340 7341 mat = chk->data; 7342 while (mat) { 7343 if (SCTP_BUF_IS_EXTENDED(mat)) { 7344 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 7345 } 7346 mat = SCTP_BUF_NEXT(mat); 7347 } 7348 } 7349 #endif 7350 /* Pull off the data */ 7351 m_adj(sp->data, to_move); 7352 /* Now lets work our way down and compact it */ 7353 m = sp->data; 7354 while (m && (SCTP_BUF_LEN(m) == 0)) { 7355 sp->data = SCTP_BUF_NEXT(m); 7356 SCTP_BUF_NEXT(m) = NULL; 7357 if (sp->tail_mbuf == m) { 7358 /*- 7359 * Freeing tail? TSNH since 7360 * we supposedly were taking less 7361 * than the sp->length. 7362 */ 7363 #ifdef INVARIANTS 7364 panic("Huh, freing tail? - TSNH"); 7365 #else 7366 SCTP_PRINTF("Huh, freeing tail? - TSNH\n"); 7367 sp->tail_mbuf = sp->data = NULL; 7368 sp->length = 0; 7369 #endif 7370 7371 } 7372 sctp_m_free(m); 7373 m = sp->data; 7374 } 7375 } 7376 if (SCTP_BUF_IS_EXTENDED(chk->data)) { 7377 chk->copy_by_ref = 1; 7378 } else { 7379 chk->copy_by_ref = 0; 7380 } 7381 /* 7382 * get last_mbuf and counts of mb useage This is ugly but hopefully 7383 * its only one mbuf. 7384 */ 7385 if (chk->last_mbuf == NULL) { 7386 chk->last_mbuf = chk->data; 7387 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) { 7388 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf); 7389 } 7390 } 7391 if (to_move > length) { 7392 /*- This should not happen either 7393 * since we always lower to_move to the size 7394 * of sp->length if its larger. 7395 */ 7396 #ifdef INVARIANTS 7397 panic("Huh, how can to_move be larger?"); 7398 #else 7399 SCTP_PRINTF("Huh, how can to_move be larger?\n"); 7400 sp->length = 0; 7401 #endif 7402 } else { 7403 atomic_subtract_int(&sp->length, to_move); 7404 } 7405 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) { 7406 /* Not enough room for a chunk header, get some */ 7407 struct mbuf *m; 7408 7409 m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA); 7410 if (m == NULL) { 7411 /* 7412 * we're in trouble here. _PREPEND below will free 7413 * all the data if there is no leading space, so we 7414 * must put the data back and restore. 7415 */ 7416 if (send_lock_up == 0) { 7417 SCTP_TCB_SEND_LOCK(stcb); 7418 send_lock_up = 1; 7419 } 7420 if (chk->data == NULL) { 7421 /* unsteal the data */ 7422 sp->data = chk->data; 7423 sp->tail_mbuf = chk->last_mbuf; 7424 } else { 7425 struct mbuf *m_tmp; 7426 7427 /* reassemble the data */ 7428 m_tmp = sp->data; 7429 sp->data = chk->data; 7430 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp; 7431 } 7432 sp->some_taken = some_taken; 7433 atomic_add_int(&sp->length, to_move); 7434 chk->data = NULL; 7435 *bail = 1; 7436 sctp_free_a_chunk(stcb, chk, so_locked); 7437 to_move = 0; 7438 goto out_of; 7439 } else { 7440 SCTP_BUF_LEN(m) = 0; 7441 SCTP_BUF_NEXT(m) = chk->data; 7442 chk->data = m; 7443 M_ALIGN(chk->data, 4); 7444 } 7445 } 7446 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT); 7447 if (chk->data == NULL) { 7448 /* HELP, TSNH since we assured it would not above? */ 7449 #ifdef INVARIANTS 7450 panic("prepend failes HELP?"); 7451 #else 7452 SCTP_PRINTF("prepend fails HELP?\n"); 7453 sctp_free_a_chunk(stcb, chk, so_locked); 7454 #endif 7455 *bail = 1; 7456 to_move = 0; 7457 goto out_of; 7458 } 7459 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk)); 7460 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk)); 7461 chk->book_size_scale = 0; 7462 chk->sent = SCTP_DATAGRAM_UNSENT; 7463 7464 chk->flags = 0; 7465 chk->asoc = &stcb->asoc; 7466 chk->pad_inplace = 0; 7467 chk->no_fr_allowed = 0; 7468 chk->rec.data.stream_seq = sp->strseq; 7469 chk->rec.data.stream_number = sp->stream; 7470 chk->rec.data.payloadtype = sp->ppid; 7471 chk->rec.data.context = sp->context; 7472 chk->rec.data.doing_fast_retransmit = 0; 7473 7474 chk->rec.data.timetodrop = sp->ts; 7475 chk->flags = sp->act_flags; 7476 7477 if (sp->net) { 7478 chk->whoTo = sp->net; 7479 atomic_add_int(&chk->whoTo->ref_count, 1); 7480 } else 7481 chk->whoTo = NULL; 7482 7483 if (sp->holds_key_ref) { 7484 chk->auth_keyid = sp->auth_keyid; 7485 sctp_auth_key_acquire(stcb, chk->auth_keyid); 7486 chk->holds_key_ref = 1; 7487 } 7488 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1); 7489 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) { 7490 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND, 7491 (uintptr_t) stcb, sp->length, 7492 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq), 7493 chk->rec.data.TSN_seq); 7494 } 7495 dchkh = mtod(chk->data, struct sctp_data_chunk *); 7496 /* 7497 * Put the rest of the things in place now. Size was done earlier in 7498 * previous loop prior to padding. 7499 */ 7500 7501 #ifdef SCTP_ASOCLOG_OF_TSNS 7502 SCTP_TCB_LOCK_ASSERT(stcb); 7503 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) { 7504 asoc->tsn_out_at = 0; 7505 asoc->tsn_out_wrapped = 1; 7506 } 7507 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq; 7508 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number; 7509 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq; 7510 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size; 7511 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags; 7512 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb; 7513 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at; 7514 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2; 7515 asoc->tsn_out_at++; 7516 #endif 7517 7518 dchkh->ch.chunk_type = SCTP_DATA; 7519 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags; 7520 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq); 7521 dchkh->dp.stream_id = htons(strq->stream_no); 7522 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq); 7523 dchkh->dp.protocol_id = chk->rec.data.payloadtype; 7524 dchkh->ch.chunk_length = htons(chk->send_size); 7525 /* Now advance the chk->send_size by the actual pad needed. */ 7526 if (chk->send_size < SCTP_SIZE32(chk->book_size)) { 7527 /* need a pad */ 7528 struct mbuf *lm; 7529 int pads; 7530 7531 pads = SCTP_SIZE32(chk->book_size) - chk->send_size; 7532 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) { 7533 chk->pad_inplace = 1; 7534 } 7535 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) { 7536 /* pad added an mbuf */ 7537 chk->last_mbuf = lm; 7538 } 7539 chk->send_size += pads; 7540 } 7541 /* We only re-set the policy if it is on */ 7542 if (sp->pr_sctp_on) { 7543 sctp_set_prsctp_policy(sp); 7544 asoc->pr_sctp_cnt++; 7545 chk->pr_sctp_on = 1; 7546 } else { 7547 chk->pr_sctp_on = 0; 7548 } 7549 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) { 7550 /* All done pull and kill the message */ 7551 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 7552 if (sp->put_last_out == 0) { 7553 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n"); 7554 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 7555 sp->sender_all_done, 7556 sp->length, 7557 sp->msg_is_complete, 7558 sp->put_last_out, 7559 send_lock_up); 7560 } 7561 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) { 7562 SCTP_TCB_SEND_LOCK(stcb); 7563 send_lock_up = 1; 7564 } 7565 TAILQ_REMOVE(&strq->outqueue, sp, next); 7566 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); 7567 if (sp->net) { 7568 sctp_free_remote_addr(sp->net); 7569 sp->net = NULL; 7570 } 7571 if (sp->data) { 7572 sctp_m_freem(sp->data); 7573 sp->data = NULL; 7574 } 7575 sctp_free_a_strmoq(stcb, sp, so_locked); 7576 7577 /* we can't be locked to it */ 7578 *locked = 0; 7579 stcb->asoc.locked_on_sending = NULL; 7580 } else { 7581 /* more to go, we are locked */ 7582 *locked = 1; 7583 } 7584 asoc->chunks_on_out_queue++; 7585 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next); 7586 asoc->send_queue_cnt++; 7587 out_of: 7588 if (send_lock_up) { 7589 SCTP_TCB_SEND_UNLOCK(stcb); 7590 send_lock_up = 0; 7591 } 7592 return (to_move); 7593 } 7594 7595 7596 static void 7597 sctp_fill_outqueue(struct sctp_tcb *stcb, 7598 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked 7599 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7600 SCTP_UNUSED 7601 #endif 7602 ) 7603 { 7604 struct sctp_association *asoc; 7605 struct sctp_stream_out *strq, *strqn; 7606 int goal_mtu, moved_how_much, total_moved = 0, bail = 0; 7607 int locked, giveup; 7608 7609 SCTP_TCB_LOCK_ASSERT(stcb); 7610 asoc = &stcb->asoc; 7611 #ifdef INET6 7612 if (net->ro._l_addr.sin6.sin6_family == AF_INET6) { 7613 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD; 7614 } else { 7615 /* ?? not sure what else to do */ 7616 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 7617 } 7618 #else 7619 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD; 7620 #endif 7621 /* Need an allowance for the data chunk header too */ 7622 goal_mtu -= sizeof(struct sctp_data_chunk); 7623 7624 /* must make even word boundary */ 7625 goal_mtu &= 0xfffffffc; 7626 if (asoc->locked_on_sending) { 7627 /* We are stuck on one stream until the message completes. */ 7628 strq = asoc->locked_on_sending; 7629 locked = 1; 7630 } else { 7631 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); 7632 locked = 0; 7633 } 7634 strqn = strq; 7635 while ((goal_mtu > 0) && strq) { 7636 giveup = 0; 7637 bail = 0; 7638 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked, 7639 &giveup, eeor_mode, &bail, so_locked); 7640 if (moved_how_much) 7641 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much); 7642 7643 if (locked) { 7644 asoc->locked_on_sending = strq; 7645 if ((moved_how_much == 0) || (giveup) || bail) 7646 /* no more to move for now */ 7647 break; 7648 } else { 7649 asoc->locked_on_sending = NULL; 7650 if ((giveup) || bail) { 7651 break; 7652 } 7653 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); 7654 if (strq == NULL) { 7655 break; 7656 } 7657 } 7658 total_moved += moved_how_much; 7659 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk)); 7660 goal_mtu &= 0xfffffffc; 7661 } 7662 if (bail) 7663 *quit_now = 1; 7664 7665 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc); 7666 7667 if (total_moved == 0) { 7668 if ((stcb->asoc.sctp_cmt_on_off == 0) && 7669 (net == stcb->asoc.primary_destination)) { 7670 /* ran dry for primary network net */ 7671 SCTP_STAT_INCR(sctps_primary_randry); 7672 } else if (stcb->asoc.sctp_cmt_on_off > 0) { 7673 /* ran dry with CMT on */ 7674 SCTP_STAT_INCR(sctps_cmt_randry); 7675 } 7676 } 7677 } 7678 7679 void 7680 sctp_fix_ecn_echo(struct sctp_association *asoc) 7681 { 7682 struct sctp_tmit_chunk *chk; 7683 7684 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7685 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 7686 chk->sent = SCTP_DATAGRAM_UNSENT; 7687 } 7688 } 7689 } 7690 7691 void 7692 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net) 7693 { 7694 struct sctp_association *asoc; 7695 struct sctp_tmit_chunk *chk; 7696 struct sctp_stream_queue_pending *sp; 7697 unsigned int i; 7698 7699 if (net == NULL) { 7700 return; 7701 } 7702 asoc = &stcb->asoc; 7703 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 7704 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { 7705 if (sp->net == net) { 7706 sctp_free_remote_addr(sp->net); 7707 sp->net = NULL; 7708 } 7709 } 7710 } 7711 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 7712 if (chk->whoTo == net) { 7713 sctp_free_remote_addr(chk->whoTo); 7714 chk->whoTo = NULL; 7715 } 7716 } 7717 } 7718 7719 int 7720 sctp_med_chunk_output(struct sctp_inpcb *inp, 7721 struct sctp_tcb *stcb, 7722 struct sctp_association *asoc, 7723 int *num_out, 7724 int *reason_code, 7725 int control_only, int from_where, 7726 struct timeval *now, int *now_filled, int frag_point, int so_locked 7727 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7728 SCTP_UNUSED 7729 #endif 7730 ) 7731 { 7732 /* 7733 * Ok this is the generic chunk service queue. we must do the 7734 * following: - Service the stream queue that is next, moving any 7735 * message (note I must get a complete message i.e. FIRST/MIDDLE and 7736 * LAST to the out queue in one pass) and assigning TSN's - Check to 7737 * see if the cwnd/rwnd allows any output, if so we go ahead and 7738 * fomulate and send the low level chunks. Making sure to combine 7739 * any control in the control chunk queue also. 7740 */ 7741 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL; 7742 struct mbuf *outchain, *endoutchain; 7743 struct sctp_tmit_chunk *chk, *nchk; 7744 7745 /* temp arrays for unlinking */ 7746 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 7747 int no_fragmentflg, error; 7748 unsigned int max_rwnd_per_dest, max_send_per_dest; 7749 int one_chunk, hbflag, skip_data_for_this_net; 7750 int asconf, cookie, no_out_cnt; 7751 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode; 7752 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out; 7753 int tsns_sent = 0; 7754 uint32_t auth_offset = 0; 7755 struct sctp_auth_chunk *auth = NULL; 7756 uint16_t auth_keyid; 7757 int override_ok = 1; 7758 int skip_fill_up = 0; 7759 int data_auth_reqd = 0; 7760 7761 /* 7762 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the 7763 * destination. 7764 */ 7765 int quit_now = 0; 7766 7767 *num_out = 0; 7768 auth_keyid = stcb->asoc.authinfo.active_keyid; 7769 7770 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) || 7771 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) || 7772 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { 7773 eeor_mode = 1; 7774 } else { 7775 eeor_mode = 0; 7776 } 7777 ctl_cnt = no_out_cnt = asconf = cookie = 0; 7778 /* 7779 * First lets prime the pump. For each destination, if there is room 7780 * in the flight size, attempt to pull an MTU's worth out of the 7781 * stream queues into the general send_queue 7782 */ 7783 #ifdef SCTP_AUDITING_ENABLED 7784 sctp_audit_log(0xC2, 2); 7785 #endif 7786 SCTP_TCB_LOCK_ASSERT(stcb); 7787 hbflag = 0; 7788 if ((control_only) || (asoc->stream_reset_outstanding)) 7789 no_data_chunks = 1; 7790 else 7791 no_data_chunks = 0; 7792 7793 /* Nothing to possible to send? */ 7794 if ((TAILQ_EMPTY(&asoc->control_send_queue) || 7795 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) && 7796 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7797 TAILQ_EMPTY(&asoc->send_queue) && 7798 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { 7799 nothing_to_send: 7800 *reason_code = 9; 7801 return (0); 7802 } 7803 if (asoc->peers_rwnd == 0) { 7804 /* No room in peers rwnd */ 7805 *reason_code = 1; 7806 if (asoc->total_flight > 0) { 7807 /* we are allowed one chunk in flight */ 7808 no_data_chunks = 1; 7809 } 7810 } 7811 if (stcb->asoc.ecn_echo_cnt_onq) { 7812 /* Record where a sack goes, if any */ 7813 if (no_data_chunks && 7814 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) { 7815 /* Nothing but ECNe to send - we don't do that */ 7816 goto nothing_to_send; 7817 } 7818 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7819 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 7820 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { 7821 sack_goes_to = chk->whoTo; 7822 break; 7823 } 7824 } 7825 } 7826 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets); 7827 if (stcb->sctp_socket) 7828 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets; 7829 else 7830 max_send_per_dest = 0; 7831 if (no_data_chunks == 0) { 7832 /* How many non-directed chunks are there? */ 7833 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 7834 if (chk->whoTo == NULL) { 7835 /* 7836 * We already have non-directed chunks on 7837 * the queue, no need to do a fill-up. 7838 */ 7839 skip_fill_up = 1; 7840 break; 7841 } 7842 } 7843 7844 } 7845 if ((no_data_chunks == 0) && 7846 (skip_fill_up == 0) && 7847 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) { 7848 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 7849 /* 7850 * This for loop we are in takes in each net, if 7851 * its's got space in cwnd and has data sent to it 7852 * (when CMT is off) then it calls 7853 * sctp_fill_outqueue for the net. This gets data on 7854 * the send queue for that network. 7855 * 7856 * In sctp_fill_outqueue TSN's are assigned and data is 7857 * copied out of the stream buffers. Note mostly 7858 * copy by reference (we hope). 7859 */ 7860 net->window_probe = 0; 7861 if ((net != stcb->asoc.alternate) && 7862 ((net->dest_state & SCTP_ADDR_PF) || 7863 (!(net->dest_state & SCTP_ADDR_REACHABLE)) || 7864 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) { 7865 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7866 sctp_log_cwnd(stcb, net, 1, 7867 SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7868 } 7869 continue; 7870 } 7871 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && 7872 (net->flight_size == 0)) { 7873 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net); 7874 } 7875 if (net->flight_size >= net->cwnd) { 7876 /* skip this network, no room - can't fill */ 7877 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7878 sctp_log_cwnd(stcb, net, 3, 7879 SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7880 } 7881 continue; 7882 } 7883 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7884 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7885 } 7886 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked); 7887 if (quit_now) { 7888 /* memory alloc failure */ 7889 no_data_chunks = 1; 7890 break; 7891 } 7892 } 7893 } 7894 /* now service each destination and send out what we can for it */ 7895 /* Nothing to send? */ 7896 if (TAILQ_EMPTY(&asoc->control_send_queue) && 7897 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7898 TAILQ_EMPTY(&asoc->send_queue)) { 7899 *reason_code = 8; 7900 return (0); 7901 } 7902 if (asoc->sctp_cmt_on_off > 0) { 7903 /* get the last start point */ 7904 start_at = asoc->last_net_cmt_send_started; 7905 if (start_at == NULL) { 7906 /* null so to beginning */ 7907 start_at = TAILQ_FIRST(&asoc->nets); 7908 } else { 7909 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next); 7910 if (start_at == NULL) { 7911 start_at = TAILQ_FIRST(&asoc->nets); 7912 } 7913 } 7914 asoc->last_net_cmt_send_started = start_at; 7915 } else { 7916 start_at = TAILQ_FIRST(&asoc->nets); 7917 } 7918 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7919 if (chk->whoTo == NULL) { 7920 if (asoc->alternate) { 7921 chk->whoTo = asoc->alternate; 7922 } else { 7923 chk->whoTo = asoc->primary_destination; 7924 } 7925 atomic_add_int(&chk->whoTo->ref_count, 1); 7926 } 7927 } 7928 old_start_at = NULL; 7929 again_one_more_time: 7930 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) { 7931 /* how much can we send? */ 7932 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */ 7933 if (old_start_at && (old_start_at == net)) { 7934 /* through list ocmpletely. */ 7935 break; 7936 } 7937 tsns_sent = 0xa; 7938 if (TAILQ_EMPTY(&asoc->control_send_queue) && 7939 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7940 (net->flight_size >= net->cwnd)) { 7941 /* 7942 * Nothing on control or asconf and flight is full, 7943 * we can skip even in the CMT case. 7944 */ 7945 continue; 7946 } 7947 ctl_cnt = bundle_at = 0; 7948 endoutchain = outchain = NULL; 7949 no_fragmentflg = 1; 7950 one_chunk = 0; 7951 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 7952 skip_data_for_this_net = 1; 7953 } else { 7954 skip_data_for_this_net = 0; 7955 } 7956 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) { 7957 /* 7958 * if we have a route and an ifp check to see if we 7959 * have room to send to this guy 7960 */ 7961 struct ifnet *ifp; 7962 7963 ifp = net->ro.ro_rt->rt_ifp; 7964 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) { 7965 SCTP_STAT_INCR(sctps_ifnomemqueued); 7966 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 7967 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED); 7968 } 7969 continue; 7970 } 7971 } 7972 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { 7973 #ifdef INET 7974 case AF_INET: 7975 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr)); 7976 break; 7977 #endif 7978 #ifdef INET6 7979 case AF_INET6: 7980 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)); 7981 break; 7982 #endif 7983 default: 7984 /* TSNH */ 7985 mtu = net->mtu; 7986 break; 7987 } 7988 mx_mtu = mtu; 7989 to_out = 0; 7990 if (mtu > asoc->peers_rwnd) { 7991 if (asoc->total_flight > 0) { 7992 /* We have a packet in flight somewhere */ 7993 r_mtu = asoc->peers_rwnd; 7994 } else { 7995 /* We are always allowed to send one MTU out */ 7996 one_chunk = 1; 7997 r_mtu = mtu; 7998 } 7999 } else { 8000 r_mtu = mtu; 8001 } 8002 /************************/ 8003 /* ASCONF transmission */ 8004 /************************/ 8005 /* Now first lets go through the asconf queue */ 8006 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 8007 if (chk->rec.chunk_id.id != SCTP_ASCONF) { 8008 continue; 8009 } 8010 if (chk->whoTo == NULL) { 8011 if (asoc->alternate == NULL) { 8012 if (asoc->primary_destination != net) { 8013 break; 8014 } 8015 } else { 8016 if (asoc->alternate != net) { 8017 break; 8018 } 8019 } 8020 } else { 8021 if (chk->whoTo != net) { 8022 break; 8023 } 8024 } 8025 if (chk->data == NULL) { 8026 break; 8027 } 8028 if (chk->sent != SCTP_DATAGRAM_UNSENT && 8029 chk->sent != SCTP_DATAGRAM_RESEND) { 8030 break; 8031 } 8032 /* 8033 * if no AUTH is yet included and this chunk 8034 * requires it, make sure to account for it. We 8035 * don't apply the size until the AUTH chunk is 8036 * actually added below in case there is no room for 8037 * this chunk. NOTE: we overload the use of "omtu" 8038 * here 8039 */ 8040 if ((auth == NULL) && 8041 sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8042 stcb->asoc.peer_auth_chunks)) { 8043 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8044 } else 8045 omtu = 0; 8046 /* Here we do NOT factor the r_mtu */ 8047 if ((chk->send_size < (int)(mtu - omtu)) || 8048 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 8049 /* 8050 * We probably should glom the mbuf chain 8051 * from the chk->data for control but the 8052 * problem is it becomes yet one more level 8053 * of tracking to do if for some reason 8054 * output fails. Then I have got to 8055 * reconstruct the merged control chain.. el 8056 * yucko.. for now we take the easy way and 8057 * do the copy 8058 */ 8059 /* 8060 * Add an AUTH chunk, if chunk requires it 8061 * save the offset into the chain for AUTH 8062 */ 8063 if ((auth == NULL) && 8064 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8065 stcb->asoc.peer_auth_chunks))) { 8066 outchain = sctp_add_auth_chunk(outchain, 8067 &endoutchain, 8068 &auth, 8069 &auth_offset, 8070 stcb, 8071 chk->rec.chunk_id.id); 8072 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8073 } 8074 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 8075 (int)chk->rec.chunk_id.can_take_data, 8076 chk->send_size, chk->copy_by_ref); 8077 if (outchain == NULL) { 8078 *reason_code = 8; 8079 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8080 return (ENOMEM); 8081 } 8082 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8083 /* update our MTU size */ 8084 if (mtu > (chk->send_size + omtu)) 8085 mtu -= (chk->send_size + omtu); 8086 else 8087 mtu = 0; 8088 to_out += (chk->send_size + omtu); 8089 /* Do clear IP_DF ? */ 8090 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8091 no_fragmentflg = 0; 8092 } 8093 if (chk->rec.chunk_id.can_take_data) 8094 chk->data = NULL; 8095 /* 8096 * set hb flag since we can use these for 8097 * RTO 8098 */ 8099 hbflag = 1; 8100 asconf = 1; 8101 /* 8102 * should sysctl this: don't bundle data 8103 * with ASCONF since it requires AUTH 8104 */ 8105 no_data_chunks = 1; 8106 chk->sent = SCTP_DATAGRAM_SENT; 8107 if (chk->whoTo == NULL) { 8108 chk->whoTo = net; 8109 atomic_add_int(&net->ref_count, 1); 8110 } 8111 chk->snd_count++; 8112 if (mtu == 0) { 8113 /* 8114 * Ok we are out of room but we can 8115 * output without effecting the 8116 * flight size since this little guy 8117 * is a control only packet. 8118 */ 8119 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 8120 /* 8121 * do NOT clear the asconf flag as 8122 * it is used to do appropriate 8123 * source address selection. 8124 */ 8125 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 8126 (struct sockaddr *)&net->ro._l_addr, 8127 outchain, auth_offset, auth, 8128 stcb->asoc.authinfo.active_keyid, 8129 no_fragmentflg, 0, NULL, asconf, 8130 inp->sctp_lport, stcb->rport, 8131 htonl(stcb->asoc.peer_vtag), 8132 net->port, so_locked, NULL, NULL))) { 8133 if (error == ENOBUFS) { 8134 asoc->ifp_had_enobuf = 1; 8135 SCTP_STAT_INCR(sctps_lowlevelerr); 8136 } 8137 if (from_where == 0) { 8138 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8139 } 8140 if (*now_filled == 0) { 8141 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8142 *now_filled = 1; 8143 *now = net->last_sent_time; 8144 } else { 8145 net->last_sent_time = *now; 8146 } 8147 hbflag = 0; 8148 /* error, could not output */ 8149 if (error == EHOSTUNREACH) { 8150 /* 8151 * Destination went 8152 * unreachable 8153 * during this send 8154 */ 8155 sctp_move_chunks_from_net(stcb, net); 8156 } 8157 *reason_code = 7; 8158 continue; 8159 } else 8160 asoc->ifp_had_enobuf = 0; 8161 if (*now_filled == 0) { 8162 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8163 *now_filled = 1; 8164 *now = net->last_sent_time; 8165 } else { 8166 net->last_sent_time = *now; 8167 } 8168 hbflag = 0; 8169 /* 8170 * increase the number we sent, if a 8171 * cookie is sent we don't tell them 8172 * any was sent out. 8173 */ 8174 outchain = endoutchain = NULL; 8175 auth = NULL; 8176 auth_offset = 0; 8177 if (!no_out_cnt) 8178 *num_out += ctl_cnt; 8179 /* recalc a clean slate and setup */ 8180 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 8181 mtu = (net->mtu - SCTP_MIN_OVERHEAD); 8182 } else { 8183 mtu = (net->mtu - SCTP_MIN_V4_OVERHEAD); 8184 } 8185 to_out = 0; 8186 no_fragmentflg = 1; 8187 } 8188 } 8189 } 8190 /************************/ 8191 /* Control transmission */ 8192 /************************/ 8193 /* Now first lets go through the control queue */ 8194 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 8195 if ((sack_goes_to) && 8196 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) && 8197 (chk->whoTo != sack_goes_to)) { 8198 /* 8199 * if we have a sack in queue, and we are 8200 * looking at an ecn echo that is NOT queued 8201 * to where the sack is going.. 8202 */ 8203 if (chk->whoTo == net) { 8204 /* 8205 * Don't transmit it to where its 8206 * going (current net) 8207 */ 8208 continue; 8209 } else if (sack_goes_to == net) { 8210 /* 8211 * But do transmit it to this 8212 * address 8213 */ 8214 goto skip_net_check; 8215 } 8216 } 8217 if (chk->whoTo == NULL) { 8218 if (asoc->alternate == NULL) { 8219 if (asoc->primary_destination != net) { 8220 continue; 8221 } 8222 } else { 8223 if (asoc->alternate != net) { 8224 continue; 8225 } 8226 } 8227 } else { 8228 if (chk->whoTo != net) { 8229 continue; 8230 } 8231 } 8232 skip_net_check: 8233 if (chk->data == NULL) { 8234 continue; 8235 } 8236 if (chk->sent != SCTP_DATAGRAM_UNSENT) { 8237 /* 8238 * It must be unsent. Cookies and ASCONF's 8239 * hang around but there timers will force 8240 * when marked for resend. 8241 */ 8242 continue; 8243 } 8244 /* 8245 * if no AUTH is yet included and this chunk 8246 * requires it, make sure to account for it. We 8247 * don't apply the size until the AUTH chunk is 8248 * actually added below in case there is no room for 8249 * this chunk. NOTE: we overload the use of "omtu" 8250 * here 8251 */ 8252 if ((auth == NULL) && 8253 sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8254 stcb->asoc.peer_auth_chunks)) { 8255 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8256 } else 8257 omtu = 0; 8258 /* Here we do NOT factor the r_mtu */ 8259 if ((chk->send_size <= (int)(mtu - omtu)) || 8260 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 8261 /* 8262 * We probably should glom the mbuf chain 8263 * from the chk->data for control but the 8264 * problem is it becomes yet one more level 8265 * of tracking to do if for some reason 8266 * output fails. Then I have got to 8267 * reconstruct the merged control chain.. el 8268 * yucko.. for now we take the easy way and 8269 * do the copy 8270 */ 8271 /* 8272 * Add an AUTH chunk, if chunk requires it 8273 * save the offset into the chain for AUTH 8274 */ 8275 if ((auth == NULL) && 8276 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8277 stcb->asoc.peer_auth_chunks))) { 8278 outchain = sctp_add_auth_chunk(outchain, 8279 &endoutchain, 8280 &auth, 8281 &auth_offset, 8282 stcb, 8283 chk->rec.chunk_id.id); 8284 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8285 } 8286 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 8287 (int)chk->rec.chunk_id.can_take_data, 8288 chk->send_size, chk->copy_by_ref); 8289 if (outchain == NULL) { 8290 *reason_code = 8; 8291 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8292 return (ENOMEM); 8293 } 8294 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8295 /* update our MTU size */ 8296 if (mtu > (chk->send_size + omtu)) 8297 mtu -= (chk->send_size + omtu); 8298 else 8299 mtu = 0; 8300 to_out += (chk->send_size + omtu); 8301 /* Do clear IP_DF ? */ 8302 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8303 no_fragmentflg = 0; 8304 } 8305 if (chk->rec.chunk_id.can_take_data) 8306 chk->data = NULL; 8307 /* Mark things to be removed, if needed */ 8308 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 8309 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ 8310 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 8311 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 8312 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 8313 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 8314 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 8315 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 8316 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 8317 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 8318 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 8319 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) { 8320 hbflag = 1; 8321 } 8322 /* remove these chunks at the end */ 8323 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 8324 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { 8325 /* turn off the timer */ 8326 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 8327 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 8328 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1); 8329 } 8330 } 8331 ctl_cnt++; 8332 } else { 8333 /* 8334 * Other chunks, since they have 8335 * timers running (i.e. COOKIE) we 8336 * just "trust" that it gets sent or 8337 * retransmitted. 8338 */ 8339 ctl_cnt++; 8340 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 8341 cookie = 1; 8342 no_out_cnt = 1; 8343 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 8344 /* 8345 * Increment ecne send count 8346 * here this means we may be 8347 * over-zealous in our 8348 * counting if the send 8349 * fails, but its the best 8350 * place to do it (we used 8351 * to do it in the queue of 8352 * the chunk, but that did 8353 * not tell how many times 8354 * it was sent. 8355 */ 8356 SCTP_STAT_INCR(sctps_sendecne); 8357 } 8358 chk->sent = SCTP_DATAGRAM_SENT; 8359 if (chk->whoTo == NULL) { 8360 chk->whoTo = net; 8361 atomic_add_int(&net->ref_count, 1); 8362 } 8363 chk->snd_count++; 8364 } 8365 if (mtu == 0) { 8366 /* 8367 * Ok we are out of room but we can 8368 * output without effecting the 8369 * flight size since this little guy 8370 * is a control only packet. 8371 */ 8372 if (asconf) { 8373 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 8374 /* 8375 * do NOT clear the asconf 8376 * flag as it is used to do 8377 * appropriate source 8378 * address selection. 8379 */ 8380 } 8381 if (cookie) { 8382 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 8383 cookie = 0; 8384 } 8385 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 8386 (struct sockaddr *)&net->ro._l_addr, 8387 outchain, 8388 auth_offset, auth, 8389 stcb->asoc.authinfo.active_keyid, 8390 no_fragmentflg, 0, NULL, asconf, 8391 inp->sctp_lport, stcb->rport, 8392 htonl(stcb->asoc.peer_vtag), 8393 net->port, so_locked, NULL, NULL))) { 8394 if (error == ENOBUFS) { 8395 asoc->ifp_had_enobuf = 1; 8396 SCTP_STAT_INCR(sctps_lowlevelerr); 8397 } 8398 if (from_where == 0) { 8399 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8400 } 8401 /* error, could not output */ 8402 if (hbflag) { 8403 if (*now_filled == 0) { 8404 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8405 *now_filled = 1; 8406 *now = net->last_sent_time; 8407 } else { 8408 net->last_sent_time = *now; 8409 } 8410 hbflag = 0; 8411 } 8412 if (error == EHOSTUNREACH) { 8413 /* 8414 * Destination went 8415 * unreachable 8416 * during this send 8417 */ 8418 sctp_move_chunks_from_net(stcb, net); 8419 } 8420 *reason_code = 7; 8421 continue; 8422 } else 8423 asoc->ifp_had_enobuf = 0; 8424 /* Only HB or ASCONF advances time */ 8425 if (hbflag) { 8426 if (*now_filled == 0) { 8427 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8428 *now_filled = 1; 8429 *now = net->last_sent_time; 8430 } else { 8431 net->last_sent_time = *now; 8432 } 8433 hbflag = 0; 8434 } 8435 /* 8436 * increase the number we sent, if a 8437 * cookie is sent we don't tell them 8438 * any was sent out. 8439 */ 8440 outchain = endoutchain = NULL; 8441 auth = NULL; 8442 auth_offset = 0; 8443 if (!no_out_cnt) 8444 *num_out += ctl_cnt; 8445 /* recalc a clean slate and setup */ 8446 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 8447 mtu = (net->mtu - SCTP_MIN_OVERHEAD); 8448 } else { 8449 mtu = (net->mtu - SCTP_MIN_V4_OVERHEAD); 8450 } 8451 to_out = 0; 8452 no_fragmentflg = 1; 8453 } 8454 } 8455 } 8456 /* JRI: if dest is in PF state, do not send data to it */ 8457 if ((asoc->sctp_cmt_on_off > 0) && 8458 (net != stcb->asoc.alternate) && 8459 (net->dest_state & SCTP_ADDR_PF)) { 8460 goto no_data_fill; 8461 } 8462 if (net->flight_size >= net->cwnd) { 8463 goto no_data_fill; 8464 } 8465 if ((asoc->sctp_cmt_on_off > 0) && 8466 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) && 8467 (net->flight_size > max_rwnd_per_dest)) { 8468 goto no_data_fill; 8469 } 8470 /* 8471 * We need a specific accounting for the usage of the send 8472 * buffer. We also need to check the number of messages per 8473 * net. For now, this is better than nothing and it disabled 8474 * by default... 8475 */ 8476 if ((asoc->sctp_cmt_on_off > 0) && 8477 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) && 8478 (max_send_per_dest > 0) && 8479 (net->flight_size > max_send_per_dest)) { 8480 goto no_data_fill; 8481 } 8482 /*********************/ 8483 /* Data transmission */ 8484 /*********************/ 8485 /* 8486 * if AUTH for DATA is required and no AUTH has been added 8487 * yet, account for this in the mtu now... if no data can be 8488 * bundled, this adjustment won't matter anyways since the 8489 * packet will be going out... 8490 */ 8491 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, 8492 stcb->asoc.peer_auth_chunks); 8493 if (data_auth_reqd && (auth == NULL)) { 8494 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8495 } 8496 /* now lets add any data within the MTU constraints */ 8497 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { 8498 case AF_INET: 8499 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr))) 8500 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr)); 8501 else 8502 omtu = 0; 8503 break; 8504 #ifdef INET6 8505 case AF_INET6: 8506 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr))) 8507 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)); 8508 else 8509 omtu = 0; 8510 break; 8511 #endif 8512 default: 8513 /* TSNH */ 8514 omtu = 0; 8515 break; 8516 } 8517 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) && 8518 (skip_data_for_this_net == 0)) || 8519 (cookie)) { 8520 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 8521 if (no_data_chunks) { 8522 /* let only control go out */ 8523 *reason_code = 1; 8524 break; 8525 } 8526 if (net->flight_size >= net->cwnd) { 8527 /* skip this net, no room for data */ 8528 *reason_code = 2; 8529 break; 8530 } 8531 if ((chk->whoTo != NULL) && 8532 (chk->whoTo != net)) { 8533 /* Don't send the chunk on this net */ 8534 continue; 8535 } 8536 if (asoc->sctp_cmt_on_off == 0) { 8537 if ((asoc->alternate) && 8538 (asoc->alternate != net) && 8539 (chk->whoTo == NULL)) { 8540 continue; 8541 } else if ((net != asoc->primary_destination) && 8542 (asoc->alternate == NULL) && 8543 (chk->whoTo == NULL)) { 8544 continue; 8545 } 8546 } 8547 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) { 8548 /*- 8549 * strange, we have a chunk that is 8550 * to big for its destination and 8551 * yet no fragment ok flag. 8552 * Something went wrong when the 8553 * PMTU changed...we did not mark 8554 * this chunk for some reason?? I 8555 * will fix it here by letting IP 8556 * fragment it for now and printing 8557 * a warning. This really should not 8558 * happen ... 8559 */ 8560 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n", 8561 chk->send_size, mtu); 8562 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 8563 } 8564 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && 8565 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) { 8566 struct sctp_data_chunk *dchkh; 8567 8568 dchkh = mtod(chk->data, struct sctp_data_chunk *); 8569 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY; 8570 } 8571 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) || 8572 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) { 8573 /* ok we will add this one */ 8574 8575 /* 8576 * Add an AUTH chunk, if chunk 8577 * requires it, save the offset into 8578 * the chain for AUTH 8579 */ 8580 if (data_auth_reqd) { 8581 if (auth == NULL) { 8582 outchain = sctp_add_auth_chunk(outchain, 8583 &endoutchain, 8584 &auth, 8585 &auth_offset, 8586 stcb, 8587 SCTP_DATA); 8588 auth_keyid = chk->auth_keyid; 8589 override_ok = 0; 8590 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8591 } else if (override_ok) { 8592 /* 8593 * use this data's 8594 * keyid 8595 */ 8596 auth_keyid = chk->auth_keyid; 8597 override_ok = 0; 8598 } else if (auth_keyid != chk->auth_keyid) { 8599 /* 8600 * different keyid, 8601 * so done bundling 8602 */ 8603 break; 8604 } 8605 } 8606 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0, 8607 chk->send_size, chk->copy_by_ref); 8608 if (outchain == NULL) { 8609 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n"); 8610 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 8611 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8612 } 8613 *reason_code = 3; 8614 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8615 return (ENOMEM); 8616 } 8617 /* upate our MTU size */ 8618 /* Do clear IP_DF ? */ 8619 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8620 no_fragmentflg = 0; 8621 } 8622 /* unsigned subtraction of mtu */ 8623 if (mtu > chk->send_size) 8624 mtu -= chk->send_size; 8625 else 8626 mtu = 0; 8627 /* unsigned subtraction of r_mtu */ 8628 if (r_mtu > chk->send_size) 8629 r_mtu -= chk->send_size; 8630 else 8631 r_mtu = 0; 8632 8633 to_out += chk->send_size; 8634 if ((to_out > mx_mtu) && no_fragmentflg) { 8635 #ifdef INVARIANTS 8636 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out); 8637 #else 8638 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n", 8639 mx_mtu, to_out); 8640 #endif 8641 } 8642 chk->window_probe = 0; 8643 data_list[bundle_at++] = chk; 8644 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 8645 mtu = 0; 8646 break; 8647 } 8648 if (chk->sent == SCTP_DATAGRAM_UNSENT) { 8649 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) { 8650 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks); 8651 } else { 8652 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks); 8653 } 8654 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) && 8655 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0)) 8656 /* 8657 * Count number of 8658 * user msg's that 8659 * were fragmented 8660 * we do this by 8661 * counting when we 8662 * see a LAST 8663 * fragment only. 8664 */ 8665 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs); 8666 } 8667 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) { 8668 if ((one_chunk) && (stcb->asoc.total_flight == 0)) { 8669 data_list[0]->window_probe = 1; 8670 net->window_probe = 1; 8671 } 8672 break; 8673 } 8674 } else { 8675 /* 8676 * Must be sent in order of the 8677 * TSN's (on a network) 8678 */ 8679 break; 8680 } 8681 } /* for (chunk gather loop for this net) */ 8682 } /* if asoc.state OPEN */ 8683 no_data_fill: 8684 /* Is there something to send for this destination? */ 8685 if (outchain) { 8686 /* We may need to start a control timer or two */ 8687 if (asconf) { 8688 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 8689 stcb, net); 8690 /* 8691 * do NOT clear the asconf flag as it is 8692 * used to do appropriate source address 8693 * selection. 8694 */ 8695 } 8696 if (cookie) { 8697 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 8698 cookie = 0; 8699 } 8700 /* must start a send timer if data is being sent */ 8701 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) { 8702 /* 8703 * no timer running on this destination 8704 * restart it. 8705 */ 8706 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8707 } 8708 /* Now send it, if there is anything to send :> */ 8709 if ((error = sctp_lowlevel_chunk_output(inp, 8710 stcb, 8711 net, 8712 (struct sockaddr *)&net->ro._l_addr, 8713 outchain, 8714 auth_offset, 8715 auth, 8716 auth_keyid, 8717 no_fragmentflg, 8718 bundle_at, 8719 data_list[0], 8720 asconf, 8721 inp->sctp_lport, stcb->rport, 8722 htonl(stcb->asoc.peer_vtag), 8723 net->port, so_locked, NULL, NULL))) { 8724 /* error, we could not output */ 8725 if (error == ENOBUFS) { 8726 SCTP_STAT_INCR(sctps_lowlevelerr); 8727 asoc->ifp_had_enobuf = 1; 8728 } 8729 if (from_where == 0) { 8730 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8731 } 8732 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error); 8733 if (hbflag) { 8734 if (*now_filled == 0) { 8735 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8736 *now_filled = 1; 8737 *now = net->last_sent_time; 8738 } else { 8739 net->last_sent_time = *now; 8740 } 8741 hbflag = 0; 8742 } 8743 if (error == EHOSTUNREACH) { 8744 /* 8745 * Destination went unreachable 8746 * during this send 8747 */ 8748 sctp_move_chunks_from_net(stcb, net); 8749 } 8750 *reason_code = 6; 8751 /*- 8752 * I add this line to be paranoid. As far as 8753 * I can tell the continue, takes us back to 8754 * the top of the for, but just to make sure 8755 * I will reset these again here. 8756 */ 8757 ctl_cnt = bundle_at = 0; 8758 continue; /* This takes us back to the 8759 * for() for the nets. */ 8760 } else { 8761 asoc->ifp_had_enobuf = 0; 8762 } 8763 outchain = endoutchain = NULL; 8764 auth = NULL; 8765 auth_offset = 0; 8766 if (bundle_at || hbflag) { 8767 /* For data/asconf and hb set time */ 8768 if (*now_filled == 0) { 8769 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 8770 *now_filled = 1; 8771 *now = net->last_sent_time; 8772 } else { 8773 net->last_sent_time = *now; 8774 } 8775 } 8776 if (!no_out_cnt) { 8777 *num_out += (ctl_cnt + bundle_at); 8778 } 8779 if (bundle_at) { 8780 /* setup for a RTO measurement */ 8781 tsns_sent = data_list[0]->rec.data.TSN_seq; 8782 /* fill time if not already filled */ 8783 if (*now_filled == 0) { 8784 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); 8785 *now_filled = 1; 8786 *now = asoc->time_last_sent; 8787 } else { 8788 asoc->time_last_sent = *now; 8789 } 8790 if (net->rto_needed) { 8791 data_list[0]->do_rtt = 1; 8792 net->rto_needed = 0; 8793 } 8794 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at); 8795 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net); 8796 } 8797 if (one_chunk) { 8798 break; 8799 } 8800 } 8801 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 8802 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND); 8803 } 8804 } 8805 if (old_start_at == NULL) { 8806 old_start_at = start_at; 8807 start_at = TAILQ_FIRST(&asoc->nets); 8808 if (old_start_at) 8809 goto again_one_more_time; 8810 } 8811 /* 8812 * At the end there should be no NON timed chunks hanging on this 8813 * queue. 8814 */ 8815 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 8816 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND); 8817 } 8818 if ((*num_out == 0) && (*reason_code == 0)) { 8819 *reason_code = 4; 8820 } else { 8821 *reason_code = 5; 8822 } 8823 sctp_clean_up_ctl(stcb, asoc, so_locked); 8824 return (0); 8825 } 8826 8827 void 8828 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err) 8829 { 8830 /*- 8831 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of 8832 * the control chunk queue. 8833 */ 8834 struct sctp_chunkhdr *hdr; 8835 struct sctp_tmit_chunk *chk; 8836 struct mbuf *mat; 8837 8838 SCTP_TCB_LOCK_ASSERT(stcb); 8839 sctp_alloc_a_chunk(stcb, chk); 8840 if (chk == NULL) { 8841 /* no memory */ 8842 sctp_m_freem(op_err); 8843 return; 8844 } 8845 chk->copy_by_ref = 0; 8846 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT); 8847 if (op_err == NULL) { 8848 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 8849 return; 8850 } 8851 chk->send_size = 0; 8852 mat = op_err; 8853 while (mat != NULL) { 8854 chk->send_size += SCTP_BUF_LEN(mat); 8855 mat = SCTP_BUF_NEXT(mat); 8856 } 8857 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR; 8858 chk->rec.chunk_id.can_take_data = 1; 8859 chk->sent = SCTP_DATAGRAM_UNSENT; 8860 chk->snd_count = 0; 8861 chk->flags = 0; 8862 chk->asoc = &stcb->asoc; 8863 chk->data = op_err; 8864 chk->whoTo = NULL; 8865 hdr = mtod(op_err, struct sctp_chunkhdr *); 8866 hdr->chunk_type = SCTP_OPERATION_ERROR; 8867 hdr->chunk_flags = 0; 8868 hdr->chunk_length = htons(chk->send_size); 8869 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, 8870 chk, 8871 sctp_next); 8872 chk->asoc->ctrl_queue_cnt++; 8873 } 8874 8875 int 8876 sctp_send_cookie_echo(struct mbuf *m, 8877 int offset, 8878 struct sctp_tcb *stcb, 8879 struct sctp_nets *net) 8880 { 8881 /*- 8882 * pull out the cookie and put it at the front of the control chunk 8883 * queue. 8884 */ 8885 int at; 8886 struct mbuf *cookie; 8887 struct sctp_paramhdr parm, *phdr; 8888 struct sctp_chunkhdr *hdr; 8889 struct sctp_tmit_chunk *chk; 8890 uint16_t ptype, plen; 8891 8892 /* First find the cookie in the param area */ 8893 cookie = NULL; 8894 at = offset + sizeof(struct sctp_init_chunk); 8895 8896 SCTP_TCB_LOCK_ASSERT(stcb); 8897 do { 8898 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm)); 8899 if (phdr == NULL) { 8900 return (-3); 8901 } 8902 ptype = ntohs(phdr->param_type); 8903 plen = ntohs(phdr->param_length); 8904 if (ptype == SCTP_STATE_COOKIE) { 8905 int pad; 8906 8907 /* found the cookie */ 8908 if ((pad = (plen % 4))) { 8909 plen += 4 - pad; 8910 } 8911 cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT); 8912 if (cookie == NULL) { 8913 /* No memory */ 8914 return (-2); 8915 } 8916 #ifdef SCTP_MBUF_LOGGING 8917 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 8918 struct mbuf *mat; 8919 8920 mat = cookie; 8921 while (mat) { 8922 if (SCTP_BUF_IS_EXTENDED(mat)) { 8923 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 8924 } 8925 mat = SCTP_BUF_NEXT(mat); 8926 } 8927 } 8928 #endif 8929 break; 8930 } 8931 at += SCTP_SIZE32(plen); 8932 } while (phdr); 8933 if (cookie == NULL) { 8934 /* Did not find the cookie */ 8935 return (-3); 8936 } 8937 /* ok, we got the cookie lets change it into a cookie echo chunk */ 8938 8939 /* first the change from param to cookie */ 8940 hdr = mtod(cookie, struct sctp_chunkhdr *); 8941 hdr->chunk_type = SCTP_COOKIE_ECHO; 8942 hdr->chunk_flags = 0; 8943 /* get the chunk stuff now and place it in the FRONT of the queue */ 8944 sctp_alloc_a_chunk(stcb, chk); 8945 if (chk == NULL) { 8946 /* no memory */ 8947 sctp_m_freem(cookie); 8948 return (-5); 8949 } 8950 chk->copy_by_ref = 0; 8951 chk->send_size = plen; 8952 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO; 8953 chk->rec.chunk_id.can_take_data = 0; 8954 chk->sent = SCTP_DATAGRAM_UNSENT; 8955 chk->snd_count = 0; 8956 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 8957 chk->asoc = &stcb->asoc; 8958 chk->data = cookie; 8959 chk->whoTo = net; 8960 atomic_add_int(&chk->whoTo->ref_count, 1); 8961 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next); 8962 chk->asoc->ctrl_queue_cnt++; 8963 return (0); 8964 } 8965 8966 void 8967 sctp_send_heartbeat_ack(struct sctp_tcb *stcb, 8968 struct mbuf *m, 8969 int offset, 8970 int chk_length, 8971 struct sctp_nets *net) 8972 { 8973 /* 8974 * take a HB request and make it into a HB ack and send it. 8975 */ 8976 struct mbuf *outchain; 8977 struct sctp_chunkhdr *chdr; 8978 struct sctp_tmit_chunk *chk; 8979 8980 8981 if (net == NULL) 8982 /* must have a net pointer */ 8983 return; 8984 8985 outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT); 8986 if (outchain == NULL) { 8987 /* gak out of memory */ 8988 return; 8989 } 8990 #ifdef SCTP_MBUF_LOGGING 8991 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 8992 struct mbuf *mat; 8993 8994 mat = outchain; 8995 while (mat) { 8996 if (SCTP_BUF_IS_EXTENDED(mat)) { 8997 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 8998 } 8999 mat = SCTP_BUF_NEXT(mat); 9000 } 9001 } 9002 #endif 9003 chdr = mtod(outchain, struct sctp_chunkhdr *); 9004 chdr->chunk_type = SCTP_HEARTBEAT_ACK; 9005 chdr->chunk_flags = 0; 9006 if (chk_length % 4) { 9007 /* need pad */ 9008 uint32_t cpthis = 0; 9009 int padlen; 9010 9011 padlen = 4 - (chk_length % 4); 9012 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis); 9013 } 9014 sctp_alloc_a_chunk(stcb, chk); 9015 if (chk == NULL) { 9016 /* no memory */ 9017 sctp_m_freem(outchain); 9018 return; 9019 } 9020 chk->copy_by_ref = 0; 9021 chk->send_size = chk_length; 9022 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK; 9023 chk->rec.chunk_id.can_take_data = 1; 9024 chk->sent = SCTP_DATAGRAM_UNSENT; 9025 chk->snd_count = 0; 9026 chk->flags = 0; 9027 chk->asoc = &stcb->asoc; 9028 chk->data = outchain; 9029 chk->whoTo = net; 9030 atomic_add_int(&chk->whoTo->ref_count, 1); 9031 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9032 chk->asoc->ctrl_queue_cnt++; 9033 } 9034 9035 void 9036 sctp_send_cookie_ack(struct sctp_tcb *stcb) 9037 { 9038 /* formulate and queue a cookie-ack back to sender */ 9039 struct mbuf *cookie_ack; 9040 struct sctp_chunkhdr *hdr; 9041 struct sctp_tmit_chunk *chk; 9042 9043 cookie_ack = NULL; 9044 SCTP_TCB_LOCK_ASSERT(stcb); 9045 9046 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER); 9047 if (cookie_ack == NULL) { 9048 /* no mbuf's */ 9049 return; 9050 } 9051 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD); 9052 sctp_alloc_a_chunk(stcb, chk); 9053 if (chk == NULL) { 9054 /* no memory */ 9055 sctp_m_freem(cookie_ack); 9056 return; 9057 } 9058 chk->copy_by_ref = 0; 9059 chk->send_size = sizeof(struct sctp_chunkhdr); 9060 chk->rec.chunk_id.id = SCTP_COOKIE_ACK; 9061 chk->rec.chunk_id.can_take_data = 1; 9062 chk->sent = SCTP_DATAGRAM_UNSENT; 9063 chk->snd_count = 0; 9064 chk->flags = 0; 9065 chk->asoc = &stcb->asoc; 9066 chk->data = cookie_ack; 9067 if (chk->asoc->last_control_chunk_from != NULL) { 9068 chk->whoTo = chk->asoc->last_control_chunk_from; 9069 atomic_add_int(&chk->whoTo->ref_count, 1); 9070 } else { 9071 chk->whoTo = NULL; 9072 } 9073 hdr = mtod(cookie_ack, struct sctp_chunkhdr *); 9074 hdr->chunk_type = SCTP_COOKIE_ACK; 9075 hdr->chunk_flags = 0; 9076 hdr->chunk_length = htons(chk->send_size); 9077 SCTP_BUF_LEN(cookie_ack) = chk->send_size; 9078 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9079 chk->asoc->ctrl_queue_cnt++; 9080 return; 9081 } 9082 9083 9084 void 9085 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net) 9086 { 9087 /* formulate and queue a SHUTDOWN-ACK back to the sender */ 9088 struct mbuf *m_shutdown_ack; 9089 struct sctp_shutdown_ack_chunk *ack_cp; 9090 struct sctp_tmit_chunk *chk; 9091 9092 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER); 9093 if (m_shutdown_ack == NULL) { 9094 /* no mbuf's */ 9095 return; 9096 } 9097 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD); 9098 sctp_alloc_a_chunk(stcb, chk); 9099 if (chk == NULL) { 9100 /* no memory */ 9101 sctp_m_freem(m_shutdown_ack); 9102 return; 9103 } 9104 chk->copy_by_ref = 0; 9105 chk->send_size = sizeof(struct sctp_chunkhdr); 9106 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK; 9107 chk->rec.chunk_id.can_take_data = 1; 9108 chk->sent = SCTP_DATAGRAM_UNSENT; 9109 chk->snd_count = 0; 9110 chk->flags = 0; 9111 chk->asoc = &stcb->asoc; 9112 chk->data = m_shutdown_ack; 9113 chk->whoTo = net; 9114 if (chk->whoTo) { 9115 atomic_add_int(&chk->whoTo->ref_count, 1); 9116 } 9117 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *); 9118 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK; 9119 ack_cp->ch.chunk_flags = 0; 9120 ack_cp->ch.chunk_length = htons(chk->send_size); 9121 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size; 9122 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9123 chk->asoc->ctrl_queue_cnt++; 9124 return; 9125 } 9126 9127 void 9128 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net) 9129 { 9130 /* formulate and queue a SHUTDOWN to the sender */ 9131 struct mbuf *m_shutdown; 9132 struct sctp_shutdown_chunk *shutdown_cp; 9133 struct sctp_tmit_chunk *chk; 9134 9135 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER); 9136 if (m_shutdown == NULL) { 9137 /* no mbuf's */ 9138 return; 9139 } 9140 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD); 9141 sctp_alloc_a_chunk(stcb, chk); 9142 if (chk == NULL) { 9143 /* no memory */ 9144 sctp_m_freem(m_shutdown); 9145 return; 9146 } 9147 chk->copy_by_ref = 0; 9148 chk->send_size = sizeof(struct sctp_shutdown_chunk); 9149 chk->rec.chunk_id.id = SCTP_SHUTDOWN; 9150 chk->rec.chunk_id.can_take_data = 1; 9151 chk->sent = SCTP_DATAGRAM_UNSENT; 9152 chk->snd_count = 0; 9153 chk->flags = 0; 9154 chk->asoc = &stcb->asoc; 9155 chk->data = m_shutdown; 9156 chk->whoTo = net; 9157 if (chk->whoTo) { 9158 atomic_add_int(&chk->whoTo->ref_count, 1); 9159 } 9160 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *); 9161 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN; 9162 shutdown_cp->ch.chunk_flags = 0; 9163 shutdown_cp->ch.chunk_length = htons(chk->send_size); 9164 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn); 9165 SCTP_BUF_LEN(m_shutdown) = chk->send_size; 9166 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9167 chk->asoc->ctrl_queue_cnt++; 9168 return; 9169 } 9170 9171 void 9172 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked) 9173 { 9174 /* 9175 * formulate and queue an ASCONF to the peer. ASCONF parameters 9176 * should be queued on the assoc queue. 9177 */ 9178 struct sctp_tmit_chunk *chk; 9179 struct mbuf *m_asconf; 9180 int len; 9181 9182 SCTP_TCB_LOCK_ASSERT(stcb); 9183 9184 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) && 9185 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) { 9186 /* can't send a new one if there is one in flight already */ 9187 return; 9188 } 9189 /* compose an ASCONF chunk, maximum length is PMTU */ 9190 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked); 9191 if (m_asconf == NULL) { 9192 return; 9193 } 9194 sctp_alloc_a_chunk(stcb, chk); 9195 if (chk == NULL) { 9196 /* no memory */ 9197 sctp_m_freem(m_asconf); 9198 return; 9199 } 9200 chk->copy_by_ref = 0; 9201 chk->data = m_asconf; 9202 chk->send_size = len; 9203 chk->rec.chunk_id.id = SCTP_ASCONF; 9204 chk->rec.chunk_id.can_take_data = 0; 9205 chk->sent = SCTP_DATAGRAM_UNSENT; 9206 chk->snd_count = 0; 9207 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 9208 chk->asoc = &stcb->asoc; 9209 chk->whoTo = net; 9210 if (chk->whoTo) { 9211 atomic_add_int(&chk->whoTo->ref_count, 1); 9212 } 9213 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next); 9214 chk->asoc->ctrl_queue_cnt++; 9215 return; 9216 } 9217 9218 void 9219 sctp_send_asconf_ack(struct sctp_tcb *stcb) 9220 { 9221 /* 9222 * formulate and queue a asconf-ack back to sender. the asconf-ack 9223 * must be stored in the tcb. 9224 */ 9225 struct sctp_tmit_chunk *chk; 9226 struct sctp_asconf_ack *ack, *latest_ack; 9227 struct mbuf *m_ack, *m; 9228 struct sctp_nets *net = NULL; 9229 9230 SCTP_TCB_LOCK_ASSERT(stcb); 9231 /* Get the latest ASCONF-ACK */ 9232 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead); 9233 if (latest_ack == NULL) { 9234 return; 9235 } 9236 if (latest_ack->last_sent_to != NULL && 9237 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) { 9238 /* we're doing a retransmission */ 9239 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0); 9240 if (net == NULL) { 9241 /* no alternate */ 9242 if (stcb->asoc.last_control_chunk_from == NULL) { 9243 if (stcb->asoc.alternate) { 9244 net = stcb->asoc.alternate; 9245 } else { 9246 net = stcb->asoc.primary_destination; 9247 } 9248 } else { 9249 net = stcb->asoc.last_control_chunk_from; 9250 } 9251 } 9252 } else { 9253 /* normal case */ 9254 if (stcb->asoc.last_control_chunk_from == NULL) { 9255 if (stcb->asoc.alternate) { 9256 net = stcb->asoc.alternate; 9257 } else { 9258 net = stcb->asoc.primary_destination; 9259 } 9260 } else { 9261 net = stcb->asoc.last_control_chunk_from; 9262 } 9263 } 9264 latest_ack->last_sent_to = net; 9265 9266 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) { 9267 if (ack->data == NULL) { 9268 continue; 9269 } 9270 /* copy the asconf_ack */ 9271 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_DONTWAIT); 9272 if (m_ack == NULL) { 9273 /* couldn't copy it */ 9274 return; 9275 } 9276 #ifdef SCTP_MBUF_LOGGING 9277 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 9278 struct mbuf *mat; 9279 9280 mat = m_ack; 9281 while (mat) { 9282 if (SCTP_BUF_IS_EXTENDED(mat)) { 9283 sctp_log_mb(mat, SCTP_MBUF_ICOPY); 9284 } 9285 mat = SCTP_BUF_NEXT(mat); 9286 } 9287 } 9288 #endif 9289 9290 sctp_alloc_a_chunk(stcb, chk); 9291 if (chk == NULL) { 9292 /* no memory */ 9293 if (m_ack) 9294 sctp_m_freem(m_ack); 9295 return; 9296 } 9297 chk->copy_by_ref = 0; 9298 9299 chk->whoTo = net; 9300 if (chk->whoTo) { 9301 atomic_add_int(&chk->whoTo->ref_count, 1); 9302 } 9303 chk->data = m_ack; 9304 chk->send_size = 0; 9305 /* Get size */ 9306 m = m_ack; 9307 chk->send_size = ack->len; 9308 chk->rec.chunk_id.id = SCTP_ASCONF_ACK; 9309 chk->rec.chunk_id.can_take_data = 1; 9310 chk->sent = SCTP_DATAGRAM_UNSENT; 9311 chk->snd_count = 0; 9312 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */ 9313 chk->asoc = &stcb->asoc; 9314 9315 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9316 chk->asoc->ctrl_queue_cnt++; 9317 } 9318 return; 9319 } 9320 9321 9322 static int 9323 sctp_chunk_retransmission(struct sctp_inpcb *inp, 9324 struct sctp_tcb *stcb, 9325 struct sctp_association *asoc, 9326 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked 9327 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 9328 SCTP_UNUSED 9329 #endif 9330 ) 9331 { 9332 /*- 9333 * send out one MTU of retransmission. If fast_retransmit is 9334 * happening we ignore the cwnd. Otherwise we obey the cwnd and 9335 * rwnd. For a Cookie or Asconf in the control chunk queue we 9336 * retransmit them by themselves. 9337 * 9338 * For data chunks we will pick out the lowest TSN's in the sent_queue 9339 * marked for resend and bundle them all together (up to a MTU of 9340 * destination). The address to send to should have been 9341 * selected/changed where the retransmission was marked (i.e. in FR 9342 * or t3-timeout routines). 9343 */ 9344 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 9345 struct sctp_tmit_chunk *chk, *fwd; 9346 struct mbuf *m, *endofchain; 9347 struct sctp_nets *net = NULL; 9348 uint32_t tsns_sent = 0; 9349 int no_fragmentflg, bundle_at, cnt_thru; 9350 unsigned int mtu; 9351 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started; 9352 struct sctp_auth_chunk *auth = NULL; 9353 uint32_t auth_offset = 0; 9354 uint16_t auth_keyid; 9355 int override_ok = 1; 9356 int data_auth_reqd = 0; 9357 uint32_t dmtu = 0; 9358 9359 SCTP_TCB_LOCK_ASSERT(stcb); 9360 tmr_started = ctl_cnt = bundle_at = error = 0; 9361 no_fragmentflg = 1; 9362 fwd_tsn = 0; 9363 *cnt_out = 0; 9364 fwd = NULL; 9365 endofchain = m = NULL; 9366 auth_keyid = stcb->asoc.authinfo.active_keyid; 9367 #ifdef SCTP_AUDITING_ENABLED 9368 sctp_audit_log(0xC3, 1); 9369 #endif 9370 if ((TAILQ_EMPTY(&asoc->sent_queue)) && 9371 (TAILQ_EMPTY(&asoc->control_send_queue))) { 9372 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n", 9373 asoc->sent_queue_retran_cnt); 9374 asoc->sent_queue_cnt = 0; 9375 asoc->sent_queue_cnt_removeable = 0; 9376 /* send back 0/0 so we enter normal transmission */ 9377 *cnt_out = 0; 9378 return (0); 9379 } 9380 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 9381 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) || 9382 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) || 9383 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) { 9384 if (chk->sent != SCTP_DATAGRAM_RESEND) { 9385 continue; 9386 } 9387 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 9388 if (chk != asoc->str_reset) { 9389 /* 9390 * not eligible for retran if its 9391 * not ours 9392 */ 9393 continue; 9394 } 9395 } 9396 ctl_cnt++; 9397 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 9398 fwd_tsn = 1; 9399 fwd = chk; 9400 } 9401 /* 9402 * Add an AUTH chunk, if chunk requires it save the 9403 * offset into the chain for AUTH 9404 */ 9405 if ((auth == NULL) && 9406 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 9407 stcb->asoc.peer_auth_chunks))) { 9408 m = sctp_add_auth_chunk(m, &endofchain, 9409 &auth, &auth_offset, 9410 stcb, 9411 chk->rec.chunk_id.id); 9412 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9413 } 9414 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 9415 break; 9416 } 9417 } 9418 one_chunk = 0; 9419 cnt_thru = 0; 9420 /* do we have control chunks to retransmit? */ 9421 if (m != NULL) { 9422 /* Start a timer no matter if we suceed or fail */ 9423 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 9424 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo); 9425 } else if (chk->rec.chunk_id.id == SCTP_ASCONF) 9426 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo); 9427 chk->snd_count++; /* update our count */ 9428 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo, 9429 (struct sockaddr *)&chk->whoTo->ro._l_addr, m, 9430 auth_offset, auth, stcb->asoc.authinfo.active_keyid, 9431 no_fragmentflg, 0, NULL, 0, 9432 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), 9433 chk->whoTo->port, so_locked, NULL, NULL))) { 9434 SCTP_STAT_INCR(sctps_lowlevelerr); 9435 return (error); 9436 } 9437 m = endofchain = NULL; 9438 auth = NULL; 9439 auth_offset = 0; 9440 /* 9441 * We don't want to mark the net->sent time here since this 9442 * we use this for HB and retrans cannot measure RTT 9443 */ 9444 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */ 9445 *cnt_out += 1; 9446 chk->sent = SCTP_DATAGRAM_SENT; 9447 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt); 9448 if (fwd_tsn == 0) { 9449 return (0); 9450 } else { 9451 /* Clean up the fwd-tsn list */ 9452 sctp_clean_up_ctl(stcb, asoc, so_locked); 9453 return (0); 9454 } 9455 } 9456 /* 9457 * Ok, it is just data retransmission we need to do or that and a 9458 * fwd-tsn with it all. 9459 */ 9460 if (TAILQ_EMPTY(&asoc->sent_queue)) { 9461 return (SCTP_RETRAN_DONE); 9462 } 9463 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) || 9464 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) { 9465 /* not yet open, resend the cookie and that is it */ 9466 return (1); 9467 } 9468 #ifdef SCTP_AUDITING_ENABLED 9469 sctp_auditing(20, inp, stcb, NULL); 9470 #endif 9471 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks); 9472 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 9473 if (chk->sent != SCTP_DATAGRAM_RESEND) { 9474 /* No, not sent to this net or not ready for rtx */ 9475 continue; 9476 } 9477 if (chk->data == NULL) { 9478 printf("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n", 9479 chk->rec.data.TSN_seq, chk->snd_count, chk->sent); 9480 continue; 9481 } 9482 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) && 9483 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) { 9484 /* Gak, we have exceeded max unlucky retran, abort! */ 9485 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n", 9486 chk->snd_count, 9487 SCTP_BASE_SYSCTL(sctp_max_retran_chunk)); 9488 atomic_add_int(&stcb->asoc.refcnt, 1); 9489 sctp_abort_an_association(stcb->sctp_ep, stcb, 0, NULL, so_locked); 9490 SCTP_TCB_LOCK(stcb); 9491 atomic_subtract_int(&stcb->asoc.refcnt, 1); 9492 return (SCTP_RETRAN_EXIT); 9493 } 9494 /* pick up the net */ 9495 net = chk->whoTo; 9496 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 9497 mtu = (net->mtu - SCTP_MIN_OVERHEAD); 9498 } else { 9499 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 9500 } 9501 9502 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) { 9503 /* No room in peers rwnd */ 9504 uint32_t tsn; 9505 9506 tsn = asoc->last_acked_seq + 1; 9507 if (tsn == chk->rec.data.TSN_seq) { 9508 /* 9509 * we make a special exception for this 9510 * case. The peer has no rwnd but is missing 9511 * the lowest chunk.. which is probably what 9512 * is holding up the rwnd. 9513 */ 9514 goto one_chunk_around; 9515 } 9516 return (1); 9517 } 9518 one_chunk_around: 9519 if (asoc->peers_rwnd < mtu) { 9520 one_chunk = 1; 9521 if ((asoc->peers_rwnd == 0) && 9522 (asoc->total_flight == 0)) { 9523 chk->window_probe = 1; 9524 chk->whoTo->window_probe = 1; 9525 } 9526 } 9527 #ifdef SCTP_AUDITING_ENABLED 9528 sctp_audit_log(0xC3, 2); 9529 #endif 9530 bundle_at = 0; 9531 m = NULL; 9532 net->fast_retran_ip = 0; 9533 if (chk->rec.data.doing_fast_retransmit == 0) { 9534 /* 9535 * if no FR in progress skip destination that have 9536 * flight_size > cwnd. 9537 */ 9538 if (net->flight_size >= net->cwnd) { 9539 continue; 9540 } 9541 } else { 9542 /* 9543 * Mark the destination net to have FR recovery 9544 * limits put on it. 9545 */ 9546 *fr_done = 1; 9547 net->fast_retran_ip = 1; 9548 } 9549 9550 /* 9551 * if no AUTH is yet included and this chunk requires it, 9552 * make sure to account for it. We don't apply the size 9553 * until the AUTH chunk is actually added below in case 9554 * there is no room for this chunk. 9555 */ 9556 if (data_auth_reqd && (auth == NULL)) { 9557 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 9558 } else 9559 dmtu = 0; 9560 9561 if ((chk->send_size <= (mtu - dmtu)) || 9562 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 9563 /* ok we will add this one */ 9564 if (data_auth_reqd) { 9565 if (auth == NULL) { 9566 m = sctp_add_auth_chunk(m, 9567 &endofchain, 9568 &auth, 9569 &auth_offset, 9570 stcb, 9571 SCTP_DATA); 9572 auth_keyid = chk->auth_keyid; 9573 override_ok = 0; 9574 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9575 } else if (override_ok) { 9576 auth_keyid = chk->auth_keyid; 9577 override_ok = 0; 9578 } else if (chk->auth_keyid != auth_keyid) { 9579 /* different keyid, so done bundling */ 9580 break; 9581 } 9582 } 9583 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 9584 if (m == NULL) { 9585 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 9586 return (ENOMEM); 9587 } 9588 /* Do clear IP_DF ? */ 9589 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 9590 no_fragmentflg = 0; 9591 } 9592 /* upate our MTU size */ 9593 if (mtu > (chk->send_size + dmtu)) 9594 mtu -= (chk->send_size + dmtu); 9595 else 9596 mtu = 0; 9597 data_list[bundle_at++] = chk; 9598 if (one_chunk && (asoc->total_flight <= 0)) { 9599 SCTP_STAT_INCR(sctps_windowprobed); 9600 } 9601 } 9602 if (one_chunk == 0) { 9603 /* 9604 * now are there anymore forward from chk to pick 9605 * up? 9606 */ 9607 fwd = TAILQ_NEXT(chk, sctp_next); 9608 while (fwd) { 9609 if (fwd->sent != SCTP_DATAGRAM_RESEND) { 9610 /* Nope, not for retran */ 9611 fwd = TAILQ_NEXT(fwd, sctp_next); 9612 continue; 9613 } 9614 if (fwd->whoTo != net) { 9615 /* Nope, not the net in question */ 9616 fwd = TAILQ_NEXT(fwd, sctp_next); 9617 continue; 9618 } 9619 if (data_auth_reqd && (auth == NULL)) { 9620 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 9621 } else 9622 dmtu = 0; 9623 if (fwd->send_size <= (mtu - dmtu)) { 9624 if (data_auth_reqd) { 9625 if (auth == NULL) { 9626 m = sctp_add_auth_chunk(m, 9627 &endofchain, 9628 &auth, 9629 &auth_offset, 9630 stcb, 9631 SCTP_DATA); 9632 auth_keyid = fwd->auth_keyid; 9633 override_ok = 0; 9634 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9635 } else if (override_ok) { 9636 auth_keyid = fwd->auth_keyid; 9637 override_ok = 0; 9638 } else if (fwd->auth_keyid != auth_keyid) { 9639 /* 9640 * different keyid, 9641 * so done bundling 9642 */ 9643 break; 9644 } 9645 } 9646 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref); 9647 if (m == NULL) { 9648 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 9649 return (ENOMEM); 9650 } 9651 /* Do clear IP_DF ? */ 9652 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) { 9653 no_fragmentflg = 0; 9654 } 9655 /* upate our MTU size */ 9656 if (mtu > (fwd->send_size + dmtu)) 9657 mtu -= (fwd->send_size + dmtu); 9658 else 9659 mtu = 0; 9660 data_list[bundle_at++] = fwd; 9661 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 9662 break; 9663 } 9664 fwd = TAILQ_NEXT(fwd, sctp_next); 9665 } else { 9666 /* can't fit so we are done */ 9667 break; 9668 } 9669 } 9670 } 9671 /* Is there something to send for this destination? */ 9672 if (m) { 9673 /* 9674 * No matter if we fail/or suceed we should start a 9675 * timer. A failure is like a lost IP packet :-) 9676 */ 9677 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 9678 /* 9679 * no timer running on this destination 9680 * restart it. 9681 */ 9682 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 9683 tmr_started = 1; 9684 } 9685 /* Now lets send it, if there is anything to send :> */ 9686 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 9687 (struct sockaddr *)&net->ro._l_addr, m, 9688 auth_offset, auth, auth_keyid, 9689 no_fragmentflg, 0, NULL, 0, 9690 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), 9691 net->port, so_locked, NULL, NULL))) { 9692 /* error, we could not output */ 9693 SCTP_STAT_INCR(sctps_lowlevelerr); 9694 return (error); 9695 } 9696 m = endofchain = NULL; 9697 auth = NULL; 9698 auth_offset = 0; 9699 /* For HB's */ 9700 /* 9701 * We don't want to mark the net->sent time here 9702 * since this we use this for HB and retrans cannot 9703 * measure RTT 9704 */ 9705 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */ 9706 9707 /* For auto-close */ 9708 cnt_thru++; 9709 if (*now_filled == 0) { 9710 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); 9711 *now = asoc->time_last_sent; 9712 *now_filled = 1; 9713 } else { 9714 asoc->time_last_sent = *now; 9715 } 9716 *cnt_out += bundle_at; 9717 #ifdef SCTP_AUDITING_ENABLED 9718 sctp_audit_log(0xC4, bundle_at); 9719 #endif 9720 if (bundle_at) { 9721 tsns_sent = data_list[0]->rec.data.TSN_seq; 9722 } 9723 for (i = 0; i < bundle_at; i++) { 9724 SCTP_STAT_INCR(sctps_sendretransdata); 9725 data_list[i]->sent = SCTP_DATAGRAM_SENT; 9726 /* 9727 * When we have a revoked data, and we 9728 * retransmit it, then we clear the revoked 9729 * flag since this flag dictates if we 9730 * subtracted from the fs 9731 */ 9732 if (data_list[i]->rec.data.chunk_was_revoked) { 9733 /* Deflate the cwnd */ 9734 data_list[i]->whoTo->cwnd -= data_list[i]->book_size; 9735 data_list[i]->rec.data.chunk_was_revoked = 0; 9736 } 9737 data_list[i]->snd_count++; 9738 sctp_ucount_decr(asoc->sent_queue_retran_cnt); 9739 /* record the time */ 9740 data_list[i]->sent_rcv_time = asoc->time_last_sent; 9741 if (data_list[i]->book_size_scale) { 9742 /* 9743 * need to double the book size on 9744 * this one 9745 */ 9746 data_list[i]->book_size_scale = 0; 9747 /* 9748 * Since we double the booksize, we 9749 * must also double the output queue 9750 * size, since this get shrunk when 9751 * we free by this amount. 9752 */ 9753 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size); 9754 data_list[i]->book_size *= 2; 9755 9756 9757 } else { 9758 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { 9759 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 9760 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); 9761 } 9762 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 9763 (uint32_t) (data_list[i]->send_size + 9764 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); 9765 } 9766 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 9767 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND, 9768 data_list[i]->whoTo->flight_size, 9769 data_list[i]->book_size, 9770 (uintptr_t) data_list[i]->whoTo, 9771 data_list[i]->rec.data.TSN_seq); 9772 } 9773 sctp_flight_size_increase(data_list[i]); 9774 sctp_total_flight_increase(stcb, data_list[i]); 9775 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 9776 /* SWS sender side engages */ 9777 asoc->peers_rwnd = 0; 9778 } 9779 if ((i == 0) && 9780 (data_list[i]->rec.data.doing_fast_retransmit)) { 9781 SCTP_STAT_INCR(sctps_sendfastretrans); 9782 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) && 9783 (tmr_started == 0)) { 9784 /*- 9785 * ok we just fast-retrans'd 9786 * the lowest TSN, i.e the 9787 * first on the list. In 9788 * this case we want to give 9789 * some more time to get a 9790 * SACK back without a 9791 * t3-expiring. 9792 */ 9793 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net, 9794 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4); 9795 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 9796 } 9797 } 9798 } 9799 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 9800 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND); 9801 } 9802 #ifdef SCTP_AUDITING_ENABLED 9803 sctp_auditing(21, inp, stcb, NULL); 9804 #endif 9805 } else { 9806 /* None will fit */ 9807 return (1); 9808 } 9809 if (asoc->sent_queue_retran_cnt <= 0) { 9810 /* all done we have no more to retran */ 9811 asoc->sent_queue_retran_cnt = 0; 9812 break; 9813 } 9814 if (one_chunk) { 9815 /* No more room in rwnd */ 9816 return (1); 9817 } 9818 /* stop the for loop here. we sent out a packet */ 9819 break; 9820 } 9821 return (0); 9822 } 9823 9824 9825 static int 9826 sctp_timer_validation(struct sctp_inpcb *inp, 9827 struct sctp_tcb *stcb, 9828 struct sctp_association *asoc, 9829 int ret) 9830 { 9831 struct sctp_nets *net; 9832 9833 /* Validate that a timer is running somewhere */ 9834 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 9835 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 9836 /* Here is a timer */ 9837 return (ret); 9838 } 9839 } 9840 SCTP_TCB_LOCK_ASSERT(stcb); 9841 /* Gak, we did not have a timer somewhere */ 9842 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n"); 9843 if (asoc->alternate) { 9844 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate); 9845 } else { 9846 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination); 9847 } 9848 return (ret); 9849 } 9850 9851 void 9852 sctp_chunk_output(struct sctp_inpcb *inp, 9853 struct sctp_tcb *stcb, 9854 int from_where, 9855 int so_locked 9856 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 9857 SCTP_UNUSED 9858 #endif 9859 ) 9860 { 9861 /*- 9862 * Ok this is the generic chunk service queue. we must do the 9863 * following: 9864 * - See if there are retransmits pending, if so we must 9865 * do these first. 9866 * - Service the stream queue that is next, moving any 9867 * message (note I must get a complete message i.e. 9868 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning 9869 * TSN's 9870 * - Check to see if the cwnd/rwnd allows any output, if so we 9871 * go ahead and fomulate and send the low level chunks. Making sure 9872 * to combine any control in the control chunk queue also. 9873 */ 9874 struct sctp_association *asoc; 9875 struct sctp_nets *net; 9876 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0; 9877 unsigned int burst_cnt = 0; 9878 struct timeval now; 9879 int now_filled = 0; 9880 int nagle_on; 9881 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 9882 int un_sent = 0; 9883 int fr_done; 9884 unsigned int tot_frs = 0; 9885 9886 asoc = &stcb->asoc; 9887 /* The Nagle algorithm is only applied when handling a send call. */ 9888 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) { 9889 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) { 9890 nagle_on = 0; 9891 } else { 9892 nagle_on = 1; 9893 } 9894 } else { 9895 nagle_on = 0; 9896 } 9897 SCTP_TCB_LOCK_ASSERT(stcb); 9898 9899 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); 9900 9901 if ((un_sent <= 0) && 9902 (TAILQ_EMPTY(&asoc->control_send_queue)) && 9903 (TAILQ_EMPTY(&asoc->asconf_send_queue)) && 9904 (asoc->sent_queue_retran_cnt == 0)) { 9905 /* Nothing to do unless there is something to be sent left */ 9906 return; 9907 } 9908 /* 9909 * Do we have something to send, data or control AND a sack timer 9910 * running, if so piggy-back the sack. 9911 */ 9912 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 9913 sctp_send_sack(stcb, so_locked); 9914 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 9915 } 9916 while (asoc->sent_queue_retran_cnt) { 9917 /*- 9918 * Ok, it is retransmission time only, we send out only ONE 9919 * packet with a single call off to the retran code. 9920 */ 9921 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) { 9922 /*- 9923 * Special hook for handling cookiess discarded 9924 * by peer that carried data. Send cookie-ack only 9925 * and then the next call with get the retran's. 9926 */ 9927 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 9928 from_where, 9929 &now, &now_filled, frag_point, so_locked); 9930 return; 9931 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) { 9932 /* if its not from a HB then do it */ 9933 fr_done = 0; 9934 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked); 9935 if (fr_done) { 9936 tot_frs++; 9937 } 9938 } else { 9939 /* 9940 * its from any other place, we don't allow retran 9941 * output (only control) 9942 */ 9943 ret = 1; 9944 } 9945 if (ret > 0) { 9946 /* Can't send anymore */ 9947 /*- 9948 * now lets push out control by calling med-level 9949 * output once. this assures that we WILL send HB's 9950 * if queued too. 9951 */ 9952 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 9953 from_where, 9954 &now, &now_filled, frag_point, so_locked); 9955 #ifdef SCTP_AUDITING_ENABLED 9956 sctp_auditing(8, inp, stcb, NULL); 9957 #endif 9958 (void)sctp_timer_validation(inp, stcb, asoc, ret); 9959 return; 9960 } 9961 if (ret < 0) { 9962 /*- 9963 * The count was off.. retran is not happening so do 9964 * the normal retransmission. 9965 */ 9966 #ifdef SCTP_AUDITING_ENABLED 9967 sctp_auditing(9, inp, stcb, NULL); 9968 #endif 9969 if (ret == SCTP_RETRAN_EXIT) { 9970 return; 9971 } 9972 break; 9973 } 9974 if (from_where == SCTP_OUTPUT_FROM_T3) { 9975 /* Only one transmission allowed out of a timeout */ 9976 #ifdef SCTP_AUDITING_ENABLED 9977 sctp_auditing(10, inp, stcb, NULL); 9978 #endif 9979 /* Push out any control */ 9980 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where, 9981 &now, &now_filled, frag_point, so_locked); 9982 return; 9983 } 9984 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) { 9985 /* Hit FR burst limit */ 9986 return; 9987 } 9988 if ((num_out == 0) && (ret == 0)) { 9989 /* No more retrans to send */ 9990 break; 9991 } 9992 } 9993 #ifdef SCTP_AUDITING_ENABLED 9994 sctp_auditing(12, inp, stcb, NULL); 9995 #endif 9996 /* Check for bad destinations, if they exist move chunks around. */ 9997 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 9998 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 9999 /*- 10000 * if possible move things off of this address we 10001 * still may send below due to the dormant state but 10002 * we try to find an alternate address to send to 10003 * and if we have one we move all queued data on the 10004 * out wheel to this alternate address. 10005 */ 10006 if (net->ref_count > 1) 10007 sctp_move_chunks_from_net(stcb, net); 10008 } else { 10009 /*- 10010 * if ((asoc->sat_network) || (net->addr_is_local)) 10011 * { burst_limit = asoc->max_burst * 10012 * SCTP_SAT_NETWORK_BURST_INCR; } 10013 */ 10014 if (asoc->max_burst > 0) { 10015 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) { 10016 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) { 10017 /* 10018 * JRS - Use the congestion 10019 * control given in the 10020 * congestion control module 10021 */ 10022 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst); 10023 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10024 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED); 10025 } 10026 SCTP_STAT_INCR(sctps_maxburstqueued); 10027 } 10028 net->fast_retran_ip = 0; 10029 } else { 10030 if (net->flight_size == 0) { 10031 /* 10032 * Should be decaying the 10033 * cwnd here 10034 */ 10035 ; 10036 } 10037 } 10038 } 10039 } 10040 10041 } 10042 burst_cnt = 0; 10043 do { 10044 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out, 10045 &reason_code, 0, from_where, 10046 &now, &now_filled, frag_point, so_locked); 10047 if (error) { 10048 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error); 10049 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10050 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP); 10051 } 10052 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10053 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES); 10054 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES); 10055 } 10056 break; 10057 } 10058 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out); 10059 10060 tot_out += num_out; 10061 burst_cnt++; 10062 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10063 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES); 10064 if (num_out == 0) { 10065 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES); 10066 } 10067 } 10068 if (nagle_on) { 10069 /* 10070 * When the Nagle algorithm is used, look at how 10071 * much is unsent, then if its smaller than an MTU 10072 * and we have data in flight we stop, except if we 10073 * are handling a fragmented user message. 10074 */ 10075 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 10076 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 10077 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) && 10078 (stcb->asoc.total_flight > 0) && 10079 ((stcb->asoc.locked_on_sending == NULL) || 10080 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { 10081 break; 10082 } 10083 } 10084 if (TAILQ_EMPTY(&asoc->control_send_queue) && 10085 TAILQ_EMPTY(&asoc->send_queue) && 10086 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { 10087 /* Nothing left to send */ 10088 break; 10089 } 10090 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) { 10091 /* Nothing left to send */ 10092 break; 10093 } 10094 } while (num_out && 10095 ((asoc->max_burst == 0) || 10096 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) || 10097 (burst_cnt < asoc->max_burst))); 10098 10099 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) { 10100 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) { 10101 SCTP_STAT_INCR(sctps_maxburstqueued); 10102 asoc->burst_limit_applied = 1; 10103 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10104 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED); 10105 } 10106 } else { 10107 asoc->burst_limit_applied = 0; 10108 } 10109 } 10110 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10111 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES); 10112 } 10113 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n", 10114 tot_out); 10115 10116 /*- 10117 * Now we need to clean up the control chunk chain if a ECNE is on 10118 * it. It must be marked as UNSENT again so next call will continue 10119 * to send it until such time that we get a CWR, to remove it. 10120 */ 10121 if (stcb->asoc.ecn_echo_cnt_onq) 10122 sctp_fix_ecn_echo(asoc); 10123 return; 10124 } 10125 10126 10127 int 10128 sctp_output(inp, m, addr, control, p, flags) 10129 struct sctp_inpcb *inp; 10130 struct mbuf *m; 10131 struct sockaddr *addr; 10132 struct mbuf *control; 10133 struct thread *p; 10134 int flags; 10135 { 10136 if (inp == NULL) { 10137 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 10138 return (EINVAL); 10139 } 10140 if (inp->sctp_socket == NULL) { 10141 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 10142 return (EINVAL); 10143 } 10144 return (sctp_sosend(inp->sctp_socket, 10145 addr, 10146 (struct uio *)NULL, 10147 m, 10148 control, 10149 flags, p 10150 )); 10151 } 10152 10153 void 10154 send_forward_tsn(struct sctp_tcb *stcb, 10155 struct sctp_association *asoc) 10156 { 10157 struct sctp_tmit_chunk *chk; 10158 struct sctp_forward_tsn_chunk *fwdtsn; 10159 uint32_t advance_peer_ack_point; 10160 10161 SCTP_TCB_LOCK_ASSERT(stcb); 10162 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 10163 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 10164 /* mark it to unsent */ 10165 chk->sent = SCTP_DATAGRAM_UNSENT; 10166 chk->snd_count = 0; 10167 /* Do we correct its output location? */ 10168 if (chk->whoTo) { 10169 sctp_free_remote_addr(chk->whoTo); 10170 chk->whoTo = NULL; 10171 } 10172 goto sctp_fill_in_rest; 10173 } 10174 } 10175 /* Ok if we reach here we must build one */ 10176 sctp_alloc_a_chunk(stcb, chk); 10177 if (chk == NULL) { 10178 return; 10179 } 10180 asoc->fwd_tsn_cnt++; 10181 chk->copy_by_ref = 0; 10182 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN; 10183 chk->rec.chunk_id.can_take_data = 0; 10184 chk->asoc = asoc; 10185 chk->whoTo = NULL; 10186 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 10187 if (chk->data == NULL) { 10188 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 10189 return; 10190 } 10191 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 10192 chk->sent = SCTP_DATAGRAM_UNSENT; 10193 chk->snd_count = 0; 10194 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next); 10195 asoc->ctrl_queue_cnt++; 10196 sctp_fill_in_rest: 10197 /*- 10198 * Here we go through and fill out the part that deals with 10199 * stream/seq of the ones we skip. 10200 */ 10201 SCTP_BUF_LEN(chk->data) = 0; 10202 { 10203 struct sctp_tmit_chunk *at, *tp1, *last; 10204 struct sctp_strseq *strseq; 10205 unsigned int cnt_of_space, i, ovh; 10206 unsigned int space_needed; 10207 unsigned int cnt_of_skipped = 0; 10208 10209 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) { 10210 if (at->sent != SCTP_FORWARD_TSN_SKIP) { 10211 /* no more to look at */ 10212 break; 10213 } 10214 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 10215 /* We don't report these */ 10216 continue; 10217 } 10218 cnt_of_skipped++; 10219 } 10220 space_needed = (sizeof(struct sctp_forward_tsn_chunk) + 10221 (cnt_of_skipped * sizeof(struct sctp_strseq))); 10222 10223 cnt_of_space = M_TRAILINGSPACE(chk->data); 10224 10225 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 10226 ovh = SCTP_MIN_OVERHEAD; 10227 } else { 10228 ovh = SCTP_MIN_V4_OVERHEAD; 10229 } 10230 if (cnt_of_space > (asoc->smallest_mtu - ovh)) { 10231 /* trim to a mtu size */ 10232 cnt_of_space = asoc->smallest_mtu - ovh; 10233 } 10234 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10235 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10236 0xff, 0, cnt_of_skipped, 10237 asoc->advanced_peer_ack_point); 10238 10239 } 10240 advance_peer_ack_point = asoc->advanced_peer_ack_point; 10241 if (cnt_of_space < space_needed) { 10242 /*- 10243 * ok we must trim down the chunk by lowering the 10244 * advance peer ack point. 10245 */ 10246 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10247 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10248 0xff, 0xff, cnt_of_space, 10249 space_needed); 10250 } 10251 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk); 10252 cnt_of_skipped /= sizeof(struct sctp_strseq); 10253 /*- 10254 * Go through and find the TSN that will be the one 10255 * we report. 10256 */ 10257 at = TAILQ_FIRST(&asoc->sent_queue); 10258 for (i = 0; i < cnt_of_skipped; i++) { 10259 tp1 = TAILQ_NEXT(at, sctp_next); 10260 if (tp1 == NULL) { 10261 break; 10262 } 10263 at = tp1; 10264 } 10265 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10266 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10267 0xff, cnt_of_skipped, at->rec.data.TSN_seq, 10268 asoc->advanced_peer_ack_point); 10269 } 10270 last = at; 10271 /*- 10272 * last now points to last one I can report, update 10273 * peer ack point 10274 */ 10275 if (last) 10276 advance_peer_ack_point = last->rec.data.TSN_seq; 10277 space_needed = sizeof(struct sctp_forward_tsn_chunk) + 10278 cnt_of_skipped * sizeof(struct sctp_strseq); 10279 } 10280 chk->send_size = space_needed; 10281 /* Setup the chunk */ 10282 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *); 10283 fwdtsn->ch.chunk_length = htons(chk->send_size); 10284 fwdtsn->ch.chunk_flags = 0; 10285 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN; 10286 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point); 10287 SCTP_BUF_LEN(chk->data) = chk->send_size; 10288 fwdtsn++; 10289 /*- 10290 * Move pointer to after the fwdtsn and transfer to the 10291 * strseq pointer. 10292 */ 10293 strseq = (struct sctp_strseq *)fwdtsn; 10294 /*- 10295 * Now populate the strseq list. This is done blindly 10296 * without pulling out duplicate stream info. This is 10297 * inefficent but won't harm the process since the peer will 10298 * look at these in sequence and will thus release anything. 10299 * It could mean we exceed the PMTU and chop off some that 10300 * we could have included.. but this is unlikely (aka 1432/4 10301 * would mean 300+ stream seq's would have to be reported in 10302 * one FWD-TSN. With a bit of work we can later FIX this to 10303 * optimize and pull out duplcates.. but it does add more 10304 * overhead. So for now... not! 10305 */ 10306 at = TAILQ_FIRST(&asoc->sent_queue); 10307 for (i = 0; i < cnt_of_skipped; i++) { 10308 tp1 = TAILQ_NEXT(at, sctp_next); 10309 if (tp1 == NULL) 10310 break; 10311 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 10312 /* We don't report these */ 10313 i--; 10314 at = tp1; 10315 continue; 10316 } 10317 if (at->rec.data.TSN_seq == advance_peer_ack_point) { 10318 at->rec.data.fwd_tsn_cnt = 0; 10319 } 10320 strseq->stream = ntohs(at->rec.data.stream_number); 10321 strseq->sequence = ntohs(at->rec.data.stream_seq); 10322 strseq++; 10323 at = tp1; 10324 } 10325 } 10326 return; 10327 10328 } 10329 10330 void 10331 sctp_send_sack(struct sctp_tcb *stcb, int so_locked 10332 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 10333 SCTP_UNUSED 10334 #endif 10335 ) 10336 { 10337 /*- 10338 * Queue up a SACK or NR-SACK in the control queue. 10339 * We must first check to see if a SACK or NR-SACK is 10340 * somehow on the control queue. 10341 * If so, we will take and and remove the old one. 10342 */ 10343 struct sctp_association *asoc; 10344 struct sctp_tmit_chunk *chk, *a_chk; 10345 struct sctp_sack_chunk *sack; 10346 struct sctp_nr_sack_chunk *nr_sack; 10347 struct sctp_gap_ack_block *gap_descriptor; 10348 struct sack_track *selector; 10349 int mergeable = 0; 10350 int offset; 10351 caddr_t limit; 10352 uint32_t *dup; 10353 int limit_reached = 0; 10354 unsigned int i, siz, j; 10355 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space; 10356 int num_dups = 0; 10357 int space_req; 10358 uint32_t highest_tsn; 10359 uint8_t flags; 10360 uint8_t type; 10361 uint8_t tsn_map; 10362 10363 if ((stcb->asoc.sctp_nr_sack_on_off == 1) && 10364 (stcb->asoc.peer_supports_nr_sack == 1)) { 10365 type = SCTP_NR_SELECTIVE_ACK; 10366 } else { 10367 type = SCTP_SELECTIVE_ACK; 10368 } 10369 a_chk = NULL; 10370 asoc = &stcb->asoc; 10371 SCTP_TCB_LOCK_ASSERT(stcb); 10372 if (asoc->last_data_chunk_from == NULL) { 10373 /* Hmm we never received anything */ 10374 return; 10375 } 10376 sctp_slide_mapping_arrays(stcb); 10377 sctp_set_rwnd(stcb, asoc); 10378 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 10379 if (chk->rec.chunk_id.id == type) { 10380 /* Hmm, found a sack already on queue, remove it */ 10381 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 10382 asoc->ctrl_queue_cnt--; 10383 a_chk = chk; 10384 if (a_chk->data) { 10385 sctp_m_freem(a_chk->data); 10386 a_chk->data = NULL; 10387 } 10388 if (a_chk->whoTo) { 10389 sctp_free_remote_addr(a_chk->whoTo); 10390 a_chk->whoTo = NULL; 10391 } 10392 break; 10393 } 10394 } 10395 if (a_chk == NULL) { 10396 sctp_alloc_a_chunk(stcb, a_chk); 10397 if (a_chk == NULL) { 10398 /* No memory so we drop the idea, and set a timer */ 10399 if (stcb->asoc.delayed_ack) { 10400 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 10401 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5); 10402 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 10403 stcb->sctp_ep, stcb, NULL); 10404 } else { 10405 stcb->asoc.send_sack = 1; 10406 } 10407 return; 10408 } 10409 a_chk->copy_by_ref = 0; 10410 a_chk->rec.chunk_id.id = type; 10411 a_chk->rec.chunk_id.can_take_data = 1; 10412 } 10413 /* Clear our pkt counts */ 10414 asoc->data_pkts_seen = 0; 10415 10416 a_chk->asoc = asoc; 10417 a_chk->snd_count = 0; 10418 a_chk->send_size = 0; /* fill in later */ 10419 a_chk->sent = SCTP_DATAGRAM_UNSENT; 10420 a_chk->whoTo = NULL; 10421 10422 if ((asoc->numduptsns) || 10423 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) { 10424 /*- 10425 * Ok, we have some duplicates or the destination for the 10426 * sack is unreachable, lets see if we can select an 10427 * alternate than asoc->last_data_chunk_from 10428 */ 10429 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) && 10430 (asoc->used_alt_onsack > asoc->numnets)) { 10431 /* We used an alt last time, don't this time */ 10432 a_chk->whoTo = NULL; 10433 } else { 10434 asoc->used_alt_onsack++; 10435 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0); 10436 } 10437 if (a_chk->whoTo == NULL) { 10438 /* Nope, no alternate */ 10439 a_chk->whoTo = asoc->last_data_chunk_from; 10440 asoc->used_alt_onsack = 0; 10441 } 10442 } else { 10443 /* 10444 * No duplicates so we use the last place we received data 10445 * from. 10446 */ 10447 asoc->used_alt_onsack = 0; 10448 a_chk->whoTo = asoc->last_data_chunk_from; 10449 } 10450 if (a_chk->whoTo) { 10451 atomic_add_int(&a_chk->whoTo->ref_count, 1); 10452 } 10453 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) { 10454 highest_tsn = asoc->highest_tsn_inside_map; 10455 } else { 10456 highest_tsn = asoc->highest_tsn_inside_nr_map; 10457 } 10458 if (highest_tsn == asoc->cumulative_tsn) { 10459 /* no gaps */ 10460 if (type == SCTP_SELECTIVE_ACK) { 10461 space_req = sizeof(struct sctp_sack_chunk); 10462 } else { 10463 space_req = sizeof(struct sctp_nr_sack_chunk); 10464 } 10465 } else { 10466 /* gaps get a cluster */ 10467 space_req = MCLBYTES; 10468 } 10469 /* Ok now lets formulate a MBUF with our sack */ 10470 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA); 10471 if ((a_chk->data == NULL) || 10472 (a_chk->whoTo == NULL)) { 10473 /* rats, no mbuf memory */ 10474 if (a_chk->data) { 10475 /* was a problem with the destination */ 10476 sctp_m_freem(a_chk->data); 10477 a_chk->data = NULL; 10478 } 10479 sctp_free_a_chunk(stcb, a_chk, so_locked); 10480 /* sa_ignore NO_NULL_CHK */ 10481 if (stcb->asoc.delayed_ack) { 10482 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 10483 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6); 10484 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 10485 stcb->sctp_ep, stcb, NULL); 10486 } else { 10487 stcb->asoc.send_sack = 1; 10488 } 10489 return; 10490 } 10491 /* ok, lets go through and fill it in */ 10492 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD); 10493 space = M_TRAILINGSPACE(a_chk->data); 10494 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) { 10495 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD); 10496 } 10497 limit = mtod(a_chk->data, caddr_t); 10498 limit += space; 10499 10500 flags = 0; 10501 10502 if ((asoc->sctp_cmt_on_off > 0) && 10503 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) { 10504 /*- 10505 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been 10506 * received, then set high bit to 1, else 0. Reset 10507 * pkts_rcvd. 10508 */ 10509 flags |= (asoc->cmt_dac_pkts_rcvd << 6); 10510 asoc->cmt_dac_pkts_rcvd = 0; 10511 } 10512 #ifdef SCTP_ASOCLOG_OF_TSNS 10513 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn; 10514 stcb->asoc.cumack_log_atsnt++; 10515 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) { 10516 stcb->asoc.cumack_log_atsnt = 0; 10517 } 10518 #endif 10519 /* reset the readers interpretation */ 10520 stcb->freed_by_sorcv_sincelast = 0; 10521 10522 if (type == SCTP_SELECTIVE_ACK) { 10523 sack = mtod(a_chk->data, struct sctp_sack_chunk *); 10524 nr_sack = NULL; 10525 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk)); 10526 if (highest_tsn > asoc->mapping_array_base_tsn) { 10527 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10528 } else { 10529 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8; 10530 } 10531 } else { 10532 sack = NULL; 10533 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *); 10534 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk)); 10535 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) { 10536 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10537 } else { 10538 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8; 10539 } 10540 } 10541 10542 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { 10543 offset = 1; 10544 } else { 10545 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; 10546 } 10547 if (((type == SCTP_SELECTIVE_ACK) && 10548 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) || 10549 ((type == SCTP_NR_SELECTIVE_ACK) && 10550 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) { 10551 /* we have a gap .. maybe */ 10552 for (i = 0; i < siz; i++) { 10553 tsn_map = asoc->mapping_array[i]; 10554 if (type == SCTP_SELECTIVE_ACK) { 10555 tsn_map |= asoc->nr_mapping_array[i]; 10556 } 10557 if (i == 0) { 10558 /* 10559 * Clear all bits corresponding to TSNs 10560 * smaller or equal to the cumulative TSN. 10561 */ 10562 tsn_map &= (~0 << (1 - offset)); 10563 } 10564 selector = &sack_array[tsn_map]; 10565 if (mergeable && selector->right_edge) { 10566 /* 10567 * Backup, left and right edges were ok to 10568 * merge. 10569 */ 10570 num_gap_blocks--; 10571 gap_descriptor--; 10572 } 10573 if (selector->num_entries == 0) 10574 mergeable = 0; 10575 else { 10576 for (j = 0; j < selector->num_entries; j++) { 10577 if (mergeable && selector->right_edge) { 10578 /* 10579 * do a merge by NOT setting 10580 * the left side 10581 */ 10582 mergeable = 0; 10583 } else { 10584 /* 10585 * no merge, set the left 10586 * side 10587 */ 10588 mergeable = 0; 10589 gap_descriptor->start = htons((selector->gaps[j].start + offset)); 10590 } 10591 gap_descriptor->end = htons((selector->gaps[j].end + offset)); 10592 num_gap_blocks++; 10593 gap_descriptor++; 10594 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { 10595 /* no more room */ 10596 limit_reached = 1; 10597 break; 10598 } 10599 } 10600 if (selector->left_edge) { 10601 mergeable = 1; 10602 } 10603 } 10604 if (limit_reached) { 10605 /* Reached the limit stop */ 10606 break; 10607 } 10608 offset += 8; 10609 } 10610 } 10611 if ((type == SCTP_NR_SELECTIVE_ACK) && 10612 (limit_reached == 0)) { 10613 10614 mergeable = 0; 10615 10616 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) { 10617 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10618 } else { 10619 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8; 10620 } 10621 10622 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { 10623 offset = 1; 10624 } else { 10625 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; 10626 } 10627 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) { 10628 /* we have a gap .. maybe */ 10629 for (i = 0; i < siz; i++) { 10630 tsn_map = asoc->nr_mapping_array[i]; 10631 if (i == 0) { 10632 /* 10633 * Clear all bits corresponding to 10634 * TSNs smaller or equal to the 10635 * cumulative TSN. 10636 */ 10637 tsn_map &= (~0 << (1 - offset)); 10638 } 10639 selector = &sack_array[tsn_map]; 10640 if (mergeable && selector->right_edge) { 10641 /* 10642 * Backup, left and right edges were 10643 * ok to merge. 10644 */ 10645 num_nr_gap_blocks--; 10646 gap_descriptor--; 10647 } 10648 if (selector->num_entries == 0) 10649 mergeable = 0; 10650 else { 10651 for (j = 0; j < selector->num_entries; j++) { 10652 if (mergeable && selector->right_edge) { 10653 /* 10654 * do a merge by NOT 10655 * setting the left 10656 * side 10657 */ 10658 mergeable = 0; 10659 } else { 10660 /* 10661 * no merge, set the 10662 * left side 10663 */ 10664 mergeable = 0; 10665 gap_descriptor->start = htons((selector->gaps[j].start + offset)); 10666 } 10667 gap_descriptor->end = htons((selector->gaps[j].end + offset)); 10668 num_nr_gap_blocks++; 10669 gap_descriptor++; 10670 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { 10671 /* no more room */ 10672 limit_reached = 1; 10673 break; 10674 } 10675 } 10676 if (selector->left_edge) { 10677 mergeable = 1; 10678 } 10679 } 10680 if (limit_reached) { 10681 /* Reached the limit stop */ 10682 break; 10683 } 10684 offset += 8; 10685 } 10686 } 10687 } 10688 /* now we must add any dups we are going to report. */ 10689 if ((limit_reached == 0) && (asoc->numduptsns)) { 10690 dup = (uint32_t *) gap_descriptor; 10691 for (i = 0; i < asoc->numduptsns; i++) { 10692 *dup = htonl(asoc->dup_tsns[i]); 10693 dup++; 10694 num_dups++; 10695 if (((caddr_t)dup + sizeof(uint32_t)) > limit) { 10696 /* no more room */ 10697 break; 10698 } 10699 } 10700 asoc->numduptsns = 0; 10701 } 10702 /* 10703 * now that the chunk is prepared queue it to the control chunk 10704 * queue. 10705 */ 10706 if (type == SCTP_SELECTIVE_ACK) { 10707 a_chk->send_size = sizeof(struct sctp_sack_chunk) + 10708 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + 10709 num_dups * sizeof(int32_t); 10710 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; 10711 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); 10712 sack->sack.a_rwnd = htonl(asoc->my_rwnd); 10713 sack->sack.num_gap_ack_blks = htons(num_gap_blocks); 10714 sack->sack.num_dup_tsns = htons(num_dups); 10715 sack->ch.chunk_type = type; 10716 sack->ch.chunk_flags = flags; 10717 sack->ch.chunk_length = htons(a_chk->send_size); 10718 } else { 10719 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) + 10720 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + 10721 num_dups * sizeof(int32_t); 10722 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; 10723 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); 10724 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd); 10725 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks); 10726 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks); 10727 nr_sack->nr_sack.num_dup_tsns = htons(num_dups); 10728 nr_sack->nr_sack.reserved = 0; 10729 nr_sack->ch.chunk_type = type; 10730 nr_sack->ch.chunk_flags = flags; 10731 nr_sack->ch.chunk_length = htons(a_chk->send_size); 10732 } 10733 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next); 10734 asoc->my_last_reported_rwnd = asoc->my_rwnd; 10735 asoc->ctrl_queue_cnt++; 10736 asoc->send_sack = 0; 10737 SCTP_STAT_INCR(sctps_sendsacks); 10738 return; 10739 } 10740 10741 void 10742 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked 10743 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 10744 SCTP_UNUSED 10745 #endif 10746 ) 10747 { 10748 struct mbuf *m_abort; 10749 struct mbuf *m_out = NULL, *m_end = NULL; 10750 struct sctp_abort_chunk *abort = NULL; 10751 int sz; 10752 uint32_t auth_offset = 0; 10753 struct sctp_auth_chunk *auth = NULL; 10754 struct sctp_nets *net; 10755 10756 /*- 10757 * Add an AUTH chunk, if chunk requires it and save the offset into 10758 * the chain for AUTH 10759 */ 10760 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION, 10761 stcb->asoc.peer_auth_chunks)) { 10762 m_out = sctp_add_auth_chunk(m_out, &m_end, &auth, &auth_offset, 10763 stcb, SCTP_ABORT_ASSOCIATION); 10764 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10765 } 10766 SCTP_TCB_LOCK_ASSERT(stcb); 10767 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER); 10768 if (m_abort == NULL) { 10769 /* no mbuf's */ 10770 if (m_out) 10771 sctp_m_freem(m_out); 10772 return; 10773 } 10774 /* link in any error */ 10775 SCTP_BUF_NEXT(m_abort) = operr; 10776 sz = 0; 10777 if (operr) { 10778 struct mbuf *n; 10779 10780 n = operr; 10781 while (n) { 10782 sz += SCTP_BUF_LEN(n); 10783 n = SCTP_BUF_NEXT(n); 10784 } 10785 } 10786 SCTP_BUF_LEN(m_abort) = sizeof(*abort); 10787 if (m_out == NULL) { 10788 /* NO Auth chunk prepended, so reserve space in front */ 10789 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD); 10790 m_out = m_abort; 10791 } else { 10792 /* Put AUTH chunk at the front of the chain */ 10793 SCTP_BUF_NEXT(m_end) = m_abort; 10794 } 10795 if (stcb->asoc.alternate) { 10796 net = stcb->asoc.alternate; 10797 } else { 10798 net = stcb->asoc.primary_destination; 10799 } 10800 /* fill in the ABORT chunk */ 10801 abort = mtod(m_abort, struct sctp_abort_chunk *); 10802 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION; 10803 abort->ch.chunk_flags = 0; 10804 abort->ch.chunk_length = htons(sizeof(*abort) + sz); 10805 10806 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, 10807 (struct sockaddr *)&net->ro._l_addr, 10808 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, NULL, 0, 10809 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), 10810 stcb->asoc.primary_destination->port, so_locked, NULL, NULL); 10811 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10812 } 10813 10814 void 10815 sctp_send_shutdown_complete(struct sctp_tcb *stcb, 10816 struct sctp_nets *net, 10817 int reflect_vtag) 10818 { 10819 /* formulate and SEND a SHUTDOWN-COMPLETE */ 10820 struct mbuf *m_shutdown_comp; 10821 struct sctp_shutdown_complete_chunk *shutdown_complete; 10822 uint32_t vtag; 10823 uint8_t flags; 10824 10825 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER); 10826 if (m_shutdown_comp == NULL) { 10827 /* no mbuf's */ 10828 return; 10829 } 10830 if (reflect_vtag) { 10831 flags = SCTP_HAD_NO_TCB; 10832 vtag = stcb->asoc.my_vtag; 10833 } else { 10834 flags = 0; 10835 vtag = stcb->asoc.peer_vtag; 10836 } 10837 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *); 10838 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE; 10839 shutdown_complete->ch.chunk_flags = flags; 10840 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk)); 10841 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk); 10842 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, 10843 (struct sockaddr *)&net->ro._l_addr, 10844 m_shutdown_comp, 0, NULL, 0, 1, 0, NULL, 0, 10845 stcb->sctp_ep->sctp_lport, stcb->rport, 10846 htonl(vtag), 10847 net->port, SCTP_SO_NOT_LOCKED, NULL, NULL); 10848 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10849 return; 10850 } 10851 10852 void 10853 sctp_send_shutdown_complete2(struct mbuf *m, int iphlen, struct sctphdr *sh, 10854 uint32_t vrf_id, uint16_t port) 10855 { 10856 /* formulate and SEND a SHUTDOWN-COMPLETE */ 10857 struct mbuf *o_pak; 10858 struct mbuf *mout; 10859 struct ip *iph; 10860 struct udphdr *udp = NULL; 10861 int offset_out, len, mlen; 10862 struct sctp_shutdown_complete_msg *comp_cp; 10863 10864 #ifdef INET 10865 struct ip *iph_out; 10866 10867 #endif 10868 #ifdef INET6 10869 struct ip6_hdr *ip6, *ip6_out; 10870 10871 #endif 10872 10873 iph = mtod(m, struct ip *); 10874 switch (iph->ip_v) { 10875 #ifdef INET 10876 case IPVERSION: 10877 len = (sizeof(struct ip) + sizeof(struct sctp_shutdown_complete_msg)); 10878 break; 10879 #endif 10880 #ifdef INET6 10881 case IPV6_VERSION >> 4: 10882 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_shutdown_complete_msg)); 10883 break; 10884 #endif 10885 default: 10886 return; 10887 } 10888 if (port) { 10889 len += sizeof(struct udphdr); 10890 } 10891 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA); 10892 if (mout == NULL) { 10893 return; 10894 } 10895 SCTP_BUF_RESV_UF(mout, max_linkhdr); 10896 SCTP_BUF_LEN(mout) = len; 10897 SCTP_BUF_NEXT(mout) = NULL; 10898 if (m->m_flags & M_FLOWID) { 10899 mout->m_pkthdr.flowid = m->m_pkthdr.flowid; 10900 mout->m_flags |= M_FLOWID; 10901 } 10902 #ifdef INET 10903 iph_out = NULL; 10904 #endif 10905 #ifdef INET6 10906 ip6_out = NULL; 10907 #endif 10908 offset_out = 0; 10909 10910 switch (iph->ip_v) { 10911 #ifdef INET 10912 case IPVERSION: 10913 iph_out = mtod(mout, struct ip *); 10914 10915 /* Fill in the IP header for the ABORT */ 10916 iph_out->ip_v = IPVERSION; 10917 iph_out->ip_hl = (sizeof(struct ip) / 4); 10918 iph_out->ip_tos = (u_char)0; 10919 iph_out->ip_id = 0; 10920 iph_out->ip_off = 0; 10921 iph_out->ip_ttl = MAXTTL; 10922 if (port) { 10923 iph_out->ip_p = IPPROTO_UDP; 10924 } else { 10925 iph_out->ip_p = IPPROTO_SCTP; 10926 } 10927 iph_out->ip_src.s_addr = iph->ip_dst.s_addr; 10928 iph_out->ip_dst.s_addr = iph->ip_src.s_addr; 10929 10930 /* let IP layer calculate this */ 10931 iph_out->ip_sum = 0; 10932 offset_out += sizeof(*iph_out); 10933 comp_cp = (struct sctp_shutdown_complete_msg *)( 10934 (caddr_t)iph_out + offset_out); 10935 break; 10936 #endif 10937 #ifdef INET6 10938 case IPV6_VERSION >> 4: 10939 ip6 = (struct ip6_hdr *)iph; 10940 ip6_out = mtod(mout, struct ip6_hdr *); 10941 10942 /* Fill in the IPv6 header for the ABORT */ 10943 ip6_out->ip6_flow = ip6->ip6_flow; 10944 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim); 10945 if (port) { 10946 ip6_out->ip6_nxt = IPPROTO_UDP; 10947 } else { 10948 ip6_out->ip6_nxt = IPPROTO_SCTP; 10949 } 10950 ip6_out->ip6_src = ip6->ip6_dst; 10951 ip6_out->ip6_dst = ip6->ip6_src; 10952 /* 10953 * ?? The old code had both the iph len + payload, I think 10954 * this is wrong and would never have worked 10955 */ 10956 ip6_out->ip6_plen = sizeof(struct sctp_shutdown_complete_msg); 10957 offset_out += sizeof(*ip6_out); 10958 comp_cp = (struct sctp_shutdown_complete_msg *)( 10959 (caddr_t)ip6_out + offset_out); 10960 break; 10961 #endif /* INET6 */ 10962 default: 10963 /* Currently not supported. */ 10964 sctp_m_freem(mout); 10965 return; 10966 } 10967 if (port) { 10968 udp = (struct udphdr *)comp_cp; 10969 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 10970 udp->uh_dport = port; 10971 udp->uh_ulen = htons(sizeof(struct sctp_shutdown_complete_msg) + sizeof(struct udphdr)); 10972 #ifdef INET 10973 if (iph_out) 10974 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 10975 #endif 10976 offset_out += sizeof(struct udphdr); 10977 comp_cp = (struct sctp_shutdown_complete_msg *)((caddr_t)comp_cp + sizeof(struct udphdr)); 10978 } 10979 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 10980 /* no mbuf's */ 10981 sctp_m_freem(mout); 10982 return; 10983 } 10984 /* Now copy in and fill in the ABORT tags etc. */ 10985 comp_cp->sh.src_port = sh->dest_port; 10986 comp_cp->sh.dest_port = sh->src_port; 10987 comp_cp->sh.checksum = 0; 10988 comp_cp->sh.v_tag = sh->v_tag; 10989 comp_cp->shut_cmp.ch.chunk_flags = SCTP_HAD_NO_TCB; 10990 comp_cp->shut_cmp.ch.chunk_type = SCTP_SHUTDOWN_COMPLETE; 10991 comp_cp->shut_cmp.ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk)); 10992 10993 #ifdef INET 10994 if (iph_out != NULL) { 10995 sctp_route_t ro; 10996 int ret; 10997 10998 mlen = SCTP_BUF_LEN(mout); 10999 bzero(&ro, sizeof ro); 11000 /* set IPv4 length */ 11001 iph_out->ip_len = mlen; 11002 #ifdef SCTP_PACKET_LOGGING 11003 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 11004 sctp_packet_log(mout, mlen); 11005 #endif 11006 if (port) { 11007 #if defined(SCTP_WITH_NO_CSUM) 11008 SCTP_STAT_INCR(sctps_sendnocrc); 11009 #else 11010 comp_cp->sh.checksum = sctp_calculate_cksum(mout, offset_out); 11011 SCTP_STAT_INCR(sctps_sendswcrc); 11012 #endif 11013 SCTP_ENABLE_UDP_CSUM(mout); 11014 } else { 11015 #if defined(SCTP_WITH_NO_CSUM) 11016 SCTP_STAT_INCR(sctps_sendnocrc); 11017 #else 11018 mout->m_pkthdr.csum_flags = CSUM_SCTP; 11019 mout->m_pkthdr.csum_data = 0; 11020 SCTP_STAT_INCR(sctps_sendhwcrc); 11021 #endif 11022 } 11023 SCTP_ATTACH_CHAIN(o_pak, mout, mlen); 11024 /* out it goes */ 11025 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id); 11026 11027 /* Free the route if we got one back */ 11028 if (ro.ro_rt) 11029 RTFREE(ro.ro_rt); 11030 } 11031 #endif 11032 #ifdef INET6 11033 if (ip6_out != NULL) { 11034 struct route_in6 ro; 11035 int ret; 11036 struct ifnet *ifp = NULL; 11037 11038 bzero(&ro, sizeof(ro)); 11039 mlen = SCTP_BUF_LEN(mout); 11040 #ifdef SCTP_PACKET_LOGGING 11041 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 11042 sctp_packet_log(mout, mlen); 11043 #endif 11044 SCTP_ATTACH_CHAIN(o_pak, mout, mlen); 11045 if (port) { 11046 #if defined(SCTP_WITH_NO_CSUM) 11047 SCTP_STAT_INCR(sctps_sendnocrc); 11048 #else 11049 comp_cp->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 11050 SCTP_STAT_INCR(sctps_sendswcrc); 11051 #endif 11052 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), mlen - sizeof(struct ip6_hdr))) == 0) { 11053 udp->uh_sum = 0xffff; 11054 } 11055 } else { 11056 #if defined(SCTP_WITH_NO_CSUM) 11057 SCTP_STAT_INCR(sctps_sendnocrc); 11058 #else 11059 mout->m_pkthdr.csum_flags = CSUM_SCTP; 11060 mout->m_pkthdr.csum_data = 0; 11061 SCTP_STAT_INCR(sctps_sendhwcrc); 11062 #endif 11063 } 11064 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id); 11065 11066 /* Free the route if we got one back */ 11067 if (ro.ro_rt) 11068 RTFREE(ro.ro_rt); 11069 } 11070 #endif 11071 SCTP_STAT_INCR(sctps_sendpackets); 11072 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 11073 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 11074 return; 11075 11076 } 11077 11078 void 11079 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked 11080 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 11081 SCTP_UNUSED 11082 #endif 11083 ) 11084 { 11085 struct sctp_tmit_chunk *chk; 11086 struct sctp_heartbeat_chunk *hb; 11087 struct timeval now; 11088 11089 SCTP_TCB_LOCK_ASSERT(stcb); 11090 if (net == NULL) { 11091 return; 11092 } 11093 (void)SCTP_GETTIME_TIMEVAL(&now); 11094 switch (net->ro._l_addr.sa.sa_family) { 11095 #ifdef INET 11096 case AF_INET: 11097 break; 11098 #endif 11099 #ifdef INET6 11100 case AF_INET6: 11101 break; 11102 #endif 11103 default: 11104 return; 11105 } 11106 sctp_alloc_a_chunk(stcb, chk); 11107 if (chk == NULL) { 11108 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n"); 11109 return; 11110 } 11111 chk->copy_by_ref = 0; 11112 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST; 11113 chk->rec.chunk_id.can_take_data = 1; 11114 chk->asoc = &stcb->asoc; 11115 chk->send_size = sizeof(struct sctp_heartbeat_chunk); 11116 11117 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER); 11118 if (chk->data == NULL) { 11119 sctp_free_a_chunk(stcb, chk, so_locked); 11120 return; 11121 } 11122 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11123 SCTP_BUF_LEN(chk->data) = chk->send_size; 11124 chk->sent = SCTP_DATAGRAM_UNSENT; 11125 chk->snd_count = 0; 11126 chk->whoTo = net; 11127 atomic_add_int(&chk->whoTo->ref_count, 1); 11128 /* Now we have a mbuf that we can fill in with the details */ 11129 hb = mtod(chk->data, struct sctp_heartbeat_chunk *); 11130 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk)); 11131 /* fill out chunk header */ 11132 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST; 11133 hb->ch.chunk_flags = 0; 11134 hb->ch.chunk_length = htons(chk->send_size); 11135 /* Fill out hb parameter */ 11136 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO); 11137 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param)); 11138 hb->heartbeat.hb_info.time_value_1 = now.tv_sec; 11139 hb->heartbeat.hb_info.time_value_2 = now.tv_usec; 11140 /* Did our user request this one, put it in */ 11141 hb->heartbeat.hb_info.addr_family = net->ro._l_addr.sa.sa_family; 11142 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len; 11143 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 11144 /* 11145 * we only take from the entropy pool if the address is not 11146 * confirmed. 11147 */ 11148 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 11149 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 11150 } else { 11151 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0; 11152 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0; 11153 } 11154 switch (net->ro._l_addr.sa.sa_family) { 11155 #ifdef INET 11156 case AF_INET: 11157 memcpy(hb->heartbeat.hb_info.address, 11158 &net->ro._l_addr.sin.sin_addr, 11159 sizeof(net->ro._l_addr.sin.sin_addr)); 11160 break; 11161 #endif 11162 #ifdef INET6 11163 case AF_INET6: 11164 memcpy(hb->heartbeat.hb_info.address, 11165 &net->ro._l_addr.sin6.sin6_addr, 11166 sizeof(net->ro._l_addr.sin6.sin6_addr)); 11167 break; 11168 #endif 11169 default: 11170 return; 11171 break; 11172 } 11173 net->hb_responded = 0; 11174 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11175 stcb->asoc.ctrl_queue_cnt++; 11176 SCTP_STAT_INCR(sctps_sendheartbeat); 11177 return; 11178 } 11179 11180 void 11181 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net, 11182 uint32_t high_tsn) 11183 { 11184 struct sctp_association *asoc; 11185 struct sctp_ecne_chunk *ecne; 11186 struct sctp_tmit_chunk *chk; 11187 11188 if (net == NULL) { 11189 return; 11190 } 11191 asoc = &stcb->asoc; 11192 SCTP_TCB_LOCK_ASSERT(stcb); 11193 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 11194 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) { 11195 /* found a previous ECN_ECHO update it if needed */ 11196 uint32_t cnt, ctsn; 11197 11198 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 11199 ctsn = ntohl(ecne->tsn); 11200 if (SCTP_TSN_GT(high_tsn, ctsn)) { 11201 ecne->tsn = htonl(high_tsn); 11202 SCTP_STAT_INCR(sctps_queue_upd_ecne); 11203 } 11204 cnt = ntohl(ecne->num_pkts_since_cwr); 11205 cnt++; 11206 ecne->num_pkts_since_cwr = htonl(cnt); 11207 return; 11208 } 11209 } 11210 /* nope could not find one to update so we must build one */ 11211 sctp_alloc_a_chunk(stcb, chk); 11212 if (chk == NULL) { 11213 return; 11214 } 11215 chk->copy_by_ref = 0; 11216 SCTP_STAT_INCR(sctps_queue_upd_ecne); 11217 chk->rec.chunk_id.id = SCTP_ECN_ECHO; 11218 chk->rec.chunk_id.can_take_data = 0; 11219 chk->asoc = &stcb->asoc; 11220 chk->send_size = sizeof(struct sctp_ecne_chunk); 11221 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER); 11222 if (chk->data == NULL) { 11223 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11224 return; 11225 } 11226 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11227 SCTP_BUF_LEN(chk->data) = chk->send_size; 11228 chk->sent = SCTP_DATAGRAM_UNSENT; 11229 chk->snd_count = 0; 11230 chk->whoTo = net; 11231 atomic_add_int(&chk->whoTo->ref_count, 1); 11232 11233 stcb->asoc.ecn_echo_cnt_onq++; 11234 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 11235 ecne->ch.chunk_type = SCTP_ECN_ECHO; 11236 ecne->ch.chunk_flags = 0; 11237 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk)); 11238 ecne->tsn = htonl(high_tsn); 11239 ecne->num_pkts_since_cwr = htonl(1); 11240 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next); 11241 asoc->ctrl_queue_cnt++; 11242 } 11243 11244 void 11245 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net, 11246 struct mbuf *m, int iphlen, int bad_crc) 11247 { 11248 struct sctp_association *asoc; 11249 struct sctp_pktdrop_chunk *drp; 11250 struct sctp_tmit_chunk *chk; 11251 uint8_t *datap; 11252 int len; 11253 int was_trunc = 0; 11254 struct ip *iph; 11255 11256 #ifdef INET6 11257 struct ip6_hdr *ip6h; 11258 11259 #endif 11260 int fullsz = 0, extra = 0; 11261 long spc; 11262 int offset; 11263 struct sctp_chunkhdr *ch, chunk_buf; 11264 unsigned int chk_length; 11265 11266 if (!stcb) { 11267 return; 11268 } 11269 asoc = &stcb->asoc; 11270 SCTP_TCB_LOCK_ASSERT(stcb); 11271 if (asoc->peer_supports_pktdrop == 0) { 11272 /*- 11273 * peer must declare support before I send one. 11274 */ 11275 return; 11276 } 11277 if (stcb->sctp_socket == NULL) { 11278 return; 11279 } 11280 sctp_alloc_a_chunk(stcb, chk); 11281 if (chk == NULL) { 11282 return; 11283 } 11284 chk->copy_by_ref = 0; 11285 iph = mtod(m, struct ip *); 11286 if (iph == NULL) { 11287 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11288 return; 11289 } 11290 switch (iph->ip_v) { 11291 #ifdef INET 11292 case IPVERSION: 11293 /* IPv4 */ 11294 len = chk->send_size = iph->ip_len; 11295 break; 11296 #endif 11297 #ifdef INET6 11298 case IPV6_VERSION >> 4: 11299 /* IPv6 */ 11300 ip6h = mtod(m, struct ip6_hdr *); 11301 len = chk->send_size = htons(ip6h->ip6_plen); 11302 break; 11303 #endif 11304 default: 11305 return; 11306 } 11307 /* Validate that we do not have an ABORT in here. */ 11308 offset = iphlen + sizeof(struct sctphdr); 11309 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, 11310 sizeof(*ch), (uint8_t *) & chunk_buf); 11311 while (ch != NULL) { 11312 chk_length = ntohs(ch->chunk_length); 11313 if (chk_length < sizeof(*ch)) { 11314 /* break to abort land */ 11315 break; 11316 } 11317 switch (ch->chunk_type) { 11318 case SCTP_PACKET_DROPPED: 11319 case SCTP_ABORT_ASSOCIATION: 11320 case SCTP_INITIATION_ACK: 11321 /** 11322 * We don't respond with an PKT-DROP to an ABORT 11323 * or PKT-DROP. We also do not respond to an 11324 * INIT-ACK, because we can't know if the initiation 11325 * tag is correct or not. 11326 */ 11327 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11328 return; 11329 default: 11330 break; 11331 } 11332 offset += SCTP_SIZE32(chk_length); 11333 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, 11334 sizeof(*ch), (uint8_t *) & chunk_buf); 11335 } 11336 11337 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) > 11338 min(stcb->asoc.smallest_mtu, MCLBYTES)) { 11339 /* 11340 * only send 1 mtu worth, trim off the excess on the end. 11341 */ 11342 fullsz = len - extra; 11343 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD; 11344 was_trunc = 1; 11345 } 11346 chk->asoc = &stcb->asoc; 11347 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 11348 if (chk->data == NULL) { 11349 jump_out: 11350 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11351 return; 11352 } 11353 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11354 drp = mtod(chk->data, struct sctp_pktdrop_chunk *); 11355 if (drp == NULL) { 11356 sctp_m_freem(chk->data); 11357 chk->data = NULL; 11358 goto jump_out; 11359 } 11360 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) + 11361 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD)); 11362 chk->book_size_scale = 0; 11363 if (was_trunc) { 11364 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED; 11365 drp->trunc_len = htons(fullsz); 11366 /* 11367 * Len is already adjusted to size minus overhead above take 11368 * out the pkt_drop chunk itself from it. 11369 */ 11370 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk); 11371 len = chk->send_size; 11372 } else { 11373 /* no truncation needed */ 11374 drp->ch.chunk_flags = 0; 11375 drp->trunc_len = htons(0); 11376 } 11377 if (bad_crc) { 11378 drp->ch.chunk_flags |= SCTP_BADCRC; 11379 } 11380 chk->send_size += sizeof(struct sctp_pktdrop_chunk); 11381 SCTP_BUF_LEN(chk->data) = chk->send_size; 11382 chk->sent = SCTP_DATAGRAM_UNSENT; 11383 chk->snd_count = 0; 11384 if (net) { 11385 /* we should hit here */ 11386 chk->whoTo = net; 11387 atomic_add_int(&chk->whoTo->ref_count, 1); 11388 } else { 11389 chk->whoTo = NULL; 11390 } 11391 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED; 11392 chk->rec.chunk_id.can_take_data = 1; 11393 drp->ch.chunk_type = SCTP_PACKET_DROPPED; 11394 drp->ch.chunk_length = htons(chk->send_size); 11395 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket); 11396 if (spc < 0) { 11397 spc = 0; 11398 } 11399 drp->bottle_bw = htonl(spc); 11400 if (asoc->my_rwnd) { 11401 drp->current_onq = htonl(asoc->size_on_reasm_queue + 11402 asoc->size_on_all_streams + 11403 asoc->my_rwnd_control_len + 11404 stcb->sctp_socket->so_rcv.sb_cc); 11405 } else { 11406 /*- 11407 * If my rwnd is 0, possibly from mbuf depletion as well as 11408 * space used, tell the peer there is NO space aka onq == bw 11409 */ 11410 drp->current_onq = htonl(spc); 11411 } 11412 drp->reserved = 0; 11413 datap = drp->data; 11414 m_copydata(m, iphlen, len, (caddr_t)datap); 11415 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11416 asoc->ctrl_queue_cnt++; 11417 } 11418 11419 void 11420 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override) 11421 { 11422 struct sctp_association *asoc; 11423 struct sctp_cwr_chunk *cwr; 11424 struct sctp_tmit_chunk *chk; 11425 11426 asoc = &stcb->asoc; 11427 SCTP_TCB_LOCK_ASSERT(stcb); 11428 if (net == NULL) { 11429 return; 11430 } 11431 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 11432 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) { 11433 /* 11434 * found a previous CWR queued to same destination 11435 * update it if needed 11436 */ 11437 uint32_t ctsn; 11438 11439 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 11440 ctsn = ntohl(cwr->tsn); 11441 if (SCTP_TSN_GT(high_tsn, ctsn)) { 11442 cwr->tsn = htonl(high_tsn); 11443 } 11444 if (override & SCTP_CWR_REDUCE_OVERRIDE) { 11445 /* Make sure override is carried */ 11446 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE; 11447 } 11448 return; 11449 } 11450 } 11451 sctp_alloc_a_chunk(stcb, chk); 11452 if (chk == NULL) { 11453 return; 11454 } 11455 chk->copy_by_ref = 0; 11456 chk->rec.chunk_id.id = SCTP_ECN_CWR; 11457 chk->rec.chunk_id.can_take_data = 1; 11458 chk->asoc = &stcb->asoc; 11459 chk->send_size = sizeof(struct sctp_cwr_chunk); 11460 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER); 11461 if (chk->data == NULL) { 11462 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11463 return; 11464 } 11465 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11466 SCTP_BUF_LEN(chk->data) = chk->send_size; 11467 chk->sent = SCTP_DATAGRAM_UNSENT; 11468 chk->snd_count = 0; 11469 chk->whoTo = net; 11470 atomic_add_int(&chk->whoTo->ref_count, 1); 11471 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 11472 cwr->ch.chunk_type = SCTP_ECN_CWR; 11473 cwr->ch.chunk_flags = override; 11474 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk)); 11475 cwr->tsn = htonl(high_tsn); 11476 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11477 asoc->ctrl_queue_cnt++; 11478 } 11479 11480 void 11481 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk, 11482 int number_entries, uint16_t * list, 11483 uint32_t seq, uint32_t resp_seq, uint32_t last_sent) 11484 { 11485 int len, old_len, i; 11486 struct sctp_stream_reset_out_request *req_out; 11487 struct sctp_chunkhdr *ch; 11488 11489 ch = mtod(chk->data, struct sctp_chunkhdr *); 11490 11491 11492 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11493 11494 /* get to new offset for the param. */ 11495 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len); 11496 /* now how long will this param be? */ 11497 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries)); 11498 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST); 11499 req_out->ph.param_length = htons(len); 11500 req_out->request_seq = htonl(seq); 11501 req_out->response_seq = htonl(resp_seq); 11502 req_out->send_reset_at_tsn = htonl(last_sent); 11503 if (number_entries) { 11504 for (i = 0; i < number_entries; i++) { 11505 req_out->list_of_streams[i] = htons(list[i]); 11506 } 11507 } 11508 if (SCTP_SIZE32(len) > len) { 11509 /*- 11510 * Need to worry about the pad we may end up adding to the 11511 * end. This is easy since the struct is either aligned to 4 11512 * bytes or 2 bytes off. 11513 */ 11514 req_out->list_of_streams[number_entries] = 0; 11515 } 11516 /* now fix the chunk length */ 11517 ch->chunk_length = htons(len + old_len); 11518 chk->book_size = len + old_len; 11519 chk->book_size_scale = 0; 11520 chk->send_size = SCTP_SIZE32(chk->book_size); 11521 SCTP_BUF_LEN(chk->data) = chk->send_size; 11522 return; 11523 } 11524 11525 11526 void 11527 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk, 11528 int number_entries, uint16_t * list, 11529 uint32_t seq) 11530 { 11531 int len, old_len, i; 11532 struct sctp_stream_reset_in_request *req_in; 11533 struct sctp_chunkhdr *ch; 11534 11535 ch = mtod(chk->data, struct sctp_chunkhdr *); 11536 11537 11538 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11539 11540 /* get to new offset for the param. */ 11541 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len); 11542 /* now how long will this param be? */ 11543 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries)); 11544 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST); 11545 req_in->ph.param_length = htons(len); 11546 req_in->request_seq = htonl(seq); 11547 if (number_entries) { 11548 for (i = 0; i < number_entries; i++) { 11549 req_in->list_of_streams[i] = htons(list[i]); 11550 } 11551 } 11552 if (SCTP_SIZE32(len) > len) { 11553 /*- 11554 * Need to worry about the pad we may end up adding to the 11555 * end. This is easy since the struct is either aligned to 4 11556 * bytes or 2 bytes off. 11557 */ 11558 req_in->list_of_streams[number_entries] = 0; 11559 } 11560 /* now fix the chunk length */ 11561 ch->chunk_length = htons(len + old_len); 11562 chk->book_size = len + old_len; 11563 chk->book_size_scale = 0; 11564 chk->send_size = SCTP_SIZE32(chk->book_size); 11565 SCTP_BUF_LEN(chk->data) = chk->send_size; 11566 return; 11567 } 11568 11569 11570 void 11571 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk, 11572 uint32_t seq) 11573 { 11574 int len, old_len; 11575 struct sctp_stream_reset_tsn_request *req_tsn; 11576 struct sctp_chunkhdr *ch; 11577 11578 ch = mtod(chk->data, struct sctp_chunkhdr *); 11579 11580 11581 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11582 11583 /* get to new offset for the param. */ 11584 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len); 11585 /* now how long will this param be? */ 11586 len = sizeof(struct sctp_stream_reset_tsn_request); 11587 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST); 11588 req_tsn->ph.param_length = htons(len); 11589 req_tsn->request_seq = htonl(seq); 11590 11591 /* now fix the chunk length */ 11592 ch->chunk_length = htons(len + old_len); 11593 chk->send_size = len + old_len; 11594 chk->book_size = SCTP_SIZE32(chk->send_size); 11595 chk->book_size_scale = 0; 11596 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11597 return; 11598 } 11599 11600 void 11601 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk, 11602 uint32_t resp_seq, uint32_t result) 11603 { 11604 int len, old_len; 11605 struct sctp_stream_reset_response *resp; 11606 struct sctp_chunkhdr *ch; 11607 11608 ch = mtod(chk->data, struct sctp_chunkhdr *); 11609 11610 11611 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11612 11613 /* get to new offset for the param. */ 11614 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len); 11615 /* now how long will this param be? */ 11616 len = sizeof(struct sctp_stream_reset_response); 11617 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 11618 resp->ph.param_length = htons(len); 11619 resp->response_seq = htonl(resp_seq); 11620 resp->result = ntohl(result); 11621 11622 /* now fix the chunk length */ 11623 ch->chunk_length = htons(len + old_len); 11624 chk->book_size = len + old_len; 11625 chk->book_size_scale = 0; 11626 chk->send_size = SCTP_SIZE32(chk->book_size); 11627 SCTP_BUF_LEN(chk->data) = chk->send_size; 11628 return; 11629 11630 } 11631 11632 11633 void 11634 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk, 11635 uint32_t resp_seq, uint32_t result, 11636 uint32_t send_una, uint32_t recv_next) 11637 { 11638 int len, old_len; 11639 struct sctp_stream_reset_response_tsn *resp; 11640 struct sctp_chunkhdr *ch; 11641 11642 ch = mtod(chk->data, struct sctp_chunkhdr *); 11643 11644 11645 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11646 11647 /* get to new offset for the param. */ 11648 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len); 11649 /* now how long will this param be? */ 11650 len = sizeof(struct sctp_stream_reset_response_tsn); 11651 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 11652 resp->ph.param_length = htons(len); 11653 resp->response_seq = htonl(resp_seq); 11654 resp->result = htonl(result); 11655 resp->senders_next_tsn = htonl(send_una); 11656 resp->receivers_next_tsn = htonl(recv_next); 11657 11658 /* now fix the chunk length */ 11659 ch->chunk_length = htons(len + old_len); 11660 chk->book_size = len + old_len; 11661 chk->send_size = SCTP_SIZE32(chk->book_size); 11662 chk->book_size_scale = 0; 11663 SCTP_BUF_LEN(chk->data) = chk->send_size; 11664 return; 11665 } 11666 11667 static void 11668 sctp_add_a_stream(struct sctp_tmit_chunk *chk, 11669 uint32_t seq, 11670 uint16_t adding) 11671 { 11672 int len, old_len; 11673 struct sctp_chunkhdr *ch; 11674 struct sctp_stream_reset_add_strm *addstr; 11675 11676 ch = mtod(chk->data, struct sctp_chunkhdr *); 11677 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11678 11679 /* get to new offset for the param. */ 11680 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len); 11681 /* now how long will this param be? */ 11682 len = sizeof(struct sctp_stream_reset_add_strm); 11683 11684 /* Fill it out. */ 11685 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_STREAMS); 11686 addstr->ph.param_length = htons(len); 11687 addstr->request_seq = htonl(seq); 11688 addstr->number_of_streams = htons(adding); 11689 addstr->reserved = 0; 11690 11691 /* now fix the chunk length */ 11692 ch->chunk_length = htons(len + old_len); 11693 chk->send_size = len + old_len; 11694 chk->book_size = SCTP_SIZE32(chk->send_size); 11695 chk->book_size_scale = 0; 11696 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11697 return; 11698 } 11699 11700 int 11701 sctp_send_str_reset_req(struct sctp_tcb *stcb, 11702 int number_entries, uint16_t * list, 11703 uint8_t send_out_req, 11704 uint32_t resp_seq, 11705 uint8_t send_in_req, 11706 uint8_t send_tsn_req, 11707 uint8_t add_stream, 11708 uint16_t adding 11709 ) 11710 { 11711 11712 struct sctp_association *asoc; 11713 struct sctp_tmit_chunk *chk; 11714 struct sctp_chunkhdr *ch; 11715 uint32_t seq; 11716 11717 asoc = &stcb->asoc; 11718 if (asoc->stream_reset_outstanding) { 11719 /*- 11720 * Already one pending, must get ACK back to clear the flag. 11721 */ 11722 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY); 11723 return (EBUSY); 11724 } 11725 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) && 11726 (add_stream == 0)) { 11727 /* nothing to do */ 11728 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 11729 return (EINVAL); 11730 } 11731 if (send_tsn_req && (send_out_req || send_in_req)) { 11732 /* error, can't do that */ 11733 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 11734 return (EINVAL); 11735 } 11736 sctp_alloc_a_chunk(stcb, chk); 11737 if (chk == NULL) { 11738 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11739 return (ENOMEM); 11740 } 11741 chk->copy_by_ref = 0; 11742 chk->rec.chunk_id.id = SCTP_STREAM_RESET; 11743 chk->rec.chunk_id.can_take_data = 0; 11744 chk->asoc = &stcb->asoc; 11745 chk->book_size = sizeof(struct sctp_chunkhdr); 11746 chk->send_size = SCTP_SIZE32(chk->book_size); 11747 chk->book_size_scale = 0; 11748 11749 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 11750 if (chk->data == NULL) { 11751 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED); 11752 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11753 return (ENOMEM); 11754 } 11755 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11756 11757 /* setup chunk parameters */ 11758 chk->sent = SCTP_DATAGRAM_UNSENT; 11759 chk->snd_count = 0; 11760 if (stcb->asoc.alternate) { 11761 chk->whoTo = stcb->asoc.alternate; 11762 } else { 11763 chk->whoTo = stcb->asoc.primary_destination; 11764 } 11765 atomic_add_int(&chk->whoTo->ref_count, 1); 11766 ch = mtod(chk->data, struct sctp_chunkhdr *); 11767 ch->chunk_type = SCTP_STREAM_RESET; 11768 ch->chunk_flags = 0; 11769 ch->chunk_length = htons(chk->book_size); 11770 SCTP_BUF_LEN(chk->data) = chk->send_size; 11771 11772 seq = stcb->asoc.str_reset_seq_out; 11773 if (send_out_req) { 11774 sctp_add_stream_reset_out(chk, number_entries, list, 11775 seq, resp_seq, (stcb->asoc.sending_seq - 1)); 11776 asoc->stream_reset_out_is_outstanding = 1; 11777 seq++; 11778 asoc->stream_reset_outstanding++; 11779 } 11780 if (add_stream) { 11781 sctp_add_a_stream(chk, seq, adding); 11782 seq++; 11783 asoc->stream_reset_outstanding++; 11784 } 11785 if (send_in_req) { 11786 sctp_add_stream_reset_in(chk, number_entries, list, seq); 11787 asoc->stream_reset_outstanding++; 11788 } 11789 if (send_tsn_req) { 11790 sctp_add_stream_reset_tsn(chk, seq); 11791 asoc->stream_reset_outstanding++; 11792 } 11793 asoc->str_reset = chk; 11794 11795 /* insert the chunk for sending */ 11796 TAILQ_INSERT_TAIL(&asoc->control_send_queue, 11797 chk, 11798 sctp_next); 11799 asoc->ctrl_queue_cnt++; 11800 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 11801 return (0); 11802 } 11803 11804 void 11805 sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag, 11806 struct mbuf *err_cause, uint32_t vrf_id, uint16_t port) 11807 { 11808 /*- 11809 * Formulate the abort message, and send it back down. 11810 */ 11811 struct mbuf *o_pak; 11812 struct mbuf *mout; 11813 struct sctp_abort_msg *abm; 11814 struct ip *iph; 11815 struct udphdr *udp; 11816 int iphlen_out, len; 11817 11818 #ifdef INET 11819 struct ip *iph_out; 11820 11821 #endif 11822 #ifdef INET6 11823 struct ip6_hdr *ip6, *ip6_out; 11824 11825 #endif 11826 11827 /* don't respond to ABORT with ABORT */ 11828 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) { 11829 if (err_cause) 11830 sctp_m_freem(err_cause); 11831 return; 11832 } 11833 iph = mtod(m, struct ip *); 11834 switch (iph->ip_v) { 11835 #ifdef INET 11836 case IPVERSION: 11837 len = (sizeof(struct ip) + sizeof(struct sctp_abort_msg)); 11838 break; 11839 #endif 11840 #ifdef INET6 11841 case IPV6_VERSION >> 4: 11842 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_abort_msg)); 11843 break; 11844 #endif 11845 default: 11846 if (err_cause) { 11847 sctp_m_freem(err_cause); 11848 } 11849 return; 11850 } 11851 if (port) { 11852 len += sizeof(struct udphdr); 11853 } 11854 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA); 11855 if (mout == NULL) { 11856 if (err_cause) { 11857 sctp_m_freem(err_cause); 11858 } 11859 return; 11860 } 11861 SCTP_BUF_RESV_UF(mout, max_linkhdr); 11862 SCTP_BUF_LEN(mout) = len; 11863 SCTP_BUF_NEXT(mout) = err_cause; 11864 if (m->m_flags & M_FLOWID) { 11865 mout->m_pkthdr.flowid = m->m_pkthdr.flowid; 11866 mout->m_flags |= M_FLOWID; 11867 } 11868 #ifdef INET 11869 iph_out = NULL; 11870 #endif 11871 #ifdef INET6 11872 ip6_out = NULL; 11873 #endif 11874 switch (iph->ip_v) { 11875 #ifdef INET 11876 case IPVERSION: 11877 iph_out = mtod(mout, struct ip *); 11878 11879 /* Fill in the IP header for the ABORT */ 11880 iph_out->ip_v = IPVERSION; 11881 iph_out->ip_hl = (sizeof(struct ip) / 4); 11882 iph_out->ip_tos = (u_char)0; 11883 iph_out->ip_id = 0; 11884 iph_out->ip_off = 0; 11885 iph_out->ip_ttl = MAXTTL; 11886 if (port) { 11887 iph_out->ip_p = IPPROTO_UDP; 11888 } else { 11889 iph_out->ip_p = IPPROTO_SCTP; 11890 } 11891 iph_out->ip_src.s_addr = iph->ip_dst.s_addr; 11892 iph_out->ip_dst.s_addr = iph->ip_src.s_addr; 11893 /* let IP layer calculate this */ 11894 iph_out->ip_sum = 0; 11895 11896 iphlen_out = sizeof(*iph_out); 11897 abm = (struct sctp_abort_msg *)((caddr_t)iph_out + iphlen_out); 11898 break; 11899 #endif 11900 #ifdef INET6 11901 case IPV6_VERSION >> 4: 11902 ip6 = (struct ip6_hdr *)iph; 11903 ip6_out = mtod(mout, struct ip6_hdr *); 11904 11905 /* Fill in the IP6 header for the ABORT */ 11906 ip6_out->ip6_flow = ip6->ip6_flow; 11907 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim); 11908 if (port) { 11909 ip6_out->ip6_nxt = IPPROTO_UDP; 11910 } else { 11911 ip6_out->ip6_nxt = IPPROTO_SCTP; 11912 } 11913 ip6_out->ip6_src = ip6->ip6_dst; 11914 ip6_out->ip6_dst = ip6->ip6_src; 11915 11916 iphlen_out = sizeof(*ip6_out); 11917 abm = (struct sctp_abort_msg *)((caddr_t)ip6_out + iphlen_out); 11918 break; 11919 #endif /* INET6 */ 11920 default: 11921 /* Currently not supported */ 11922 sctp_m_freem(mout); 11923 return; 11924 } 11925 11926 udp = (struct udphdr *)abm; 11927 if (port) { 11928 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 11929 udp->uh_dport = port; 11930 /* set udp->uh_ulen later */ 11931 udp->uh_sum = 0; 11932 iphlen_out += sizeof(struct udphdr); 11933 abm = (struct sctp_abort_msg *)((caddr_t)abm + sizeof(struct udphdr)); 11934 } 11935 abm->sh.src_port = sh->dest_port; 11936 abm->sh.dest_port = sh->src_port; 11937 abm->sh.checksum = 0; 11938 if (vtag == 0) { 11939 abm->sh.v_tag = sh->v_tag; 11940 abm->msg.ch.chunk_flags = SCTP_HAD_NO_TCB; 11941 } else { 11942 abm->sh.v_tag = htonl(vtag); 11943 abm->msg.ch.chunk_flags = 0; 11944 } 11945 abm->msg.ch.chunk_type = SCTP_ABORT_ASSOCIATION; 11946 11947 if (err_cause) { 11948 struct mbuf *m_tmp = err_cause; 11949 int err_len = 0; 11950 11951 /* get length of the err_cause chain */ 11952 while (m_tmp != NULL) { 11953 err_len += SCTP_BUF_LEN(m_tmp); 11954 m_tmp = SCTP_BUF_NEXT(m_tmp); 11955 } 11956 len = SCTP_BUF_LEN(mout) + err_len; 11957 if (err_len % 4) { 11958 /* need pad at end of chunk */ 11959 uint32_t cpthis = 0; 11960 int padlen; 11961 11962 padlen = 4 - (len % 4); 11963 m_copyback(mout, len, padlen, (caddr_t)&cpthis); 11964 len += padlen; 11965 } 11966 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch) + err_len); 11967 } else { 11968 len = SCTP_BUF_LEN(mout); 11969 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch)); 11970 } 11971 11972 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 11973 /* no mbuf's */ 11974 sctp_m_freem(mout); 11975 return; 11976 } 11977 #ifdef INET 11978 if (iph_out != NULL) { 11979 sctp_route_t ro; 11980 int ret; 11981 11982 /* zap the stack pointer to the route */ 11983 bzero(&ro, sizeof ro); 11984 if (port) { 11985 udp->uh_ulen = htons(len - sizeof(struct ip)); 11986 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 11987 } 11988 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip_output:\n"); 11989 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, iph_out, &abm->sh); 11990 /* set IPv4 length */ 11991 iph_out->ip_len = len; 11992 /* out it goes */ 11993 #ifdef SCTP_PACKET_LOGGING 11994 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 11995 sctp_packet_log(mout, len); 11996 #endif 11997 SCTP_ATTACH_CHAIN(o_pak, mout, len); 11998 if (port) { 11999 #if defined(SCTP_WITH_NO_CSUM) 12000 SCTP_STAT_INCR(sctps_sendnocrc); 12001 #else 12002 abm->sh.checksum = sctp_calculate_cksum(mout, iphlen_out); 12003 SCTP_STAT_INCR(sctps_sendswcrc); 12004 #endif 12005 SCTP_ENABLE_UDP_CSUM(o_pak); 12006 } else { 12007 #if defined(SCTP_WITH_NO_CSUM) 12008 SCTP_STAT_INCR(sctps_sendnocrc); 12009 #else 12010 mout->m_pkthdr.csum_flags = CSUM_SCTP; 12011 mout->m_pkthdr.csum_data = 0; 12012 SCTP_STAT_INCR(sctps_sendhwcrc); 12013 #endif 12014 } 12015 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id); 12016 12017 /* Free the route if we got one back */ 12018 if (ro.ro_rt) 12019 RTFREE(ro.ro_rt); 12020 } 12021 #endif 12022 #ifdef INET6 12023 if (ip6_out != NULL) { 12024 struct route_in6 ro; 12025 int ret; 12026 struct ifnet *ifp = NULL; 12027 12028 /* zap the stack pointer to the route */ 12029 bzero(&ro, sizeof(ro)); 12030 if (port) { 12031 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr)); 12032 } 12033 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip6_output:\n"); 12034 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, (struct ip *)ip6_out, &abm->sh); 12035 ip6_out->ip6_plen = len - sizeof(*ip6_out); 12036 #ifdef SCTP_PACKET_LOGGING 12037 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 12038 sctp_packet_log(mout, len); 12039 #endif 12040 SCTP_ATTACH_CHAIN(o_pak, mout, len); 12041 if (port) { 12042 #if defined(SCTP_WITH_NO_CSUM) 12043 SCTP_STAT_INCR(sctps_sendnocrc); 12044 #else 12045 abm->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 12046 SCTP_STAT_INCR(sctps_sendswcrc); 12047 #endif 12048 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) { 12049 udp->uh_sum = 0xffff; 12050 } 12051 } else { 12052 #if defined(SCTP_WITH_NO_CSUM) 12053 SCTP_STAT_INCR(sctps_sendnocrc); 12054 #else 12055 mout->m_pkthdr.csum_flags = CSUM_SCTP; 12056 mout->m_pkthdr.csum_data = 0; 12057 SCTP_STAT_INCR(sctps_sendhwcrc); 12058 #endif 12059 } 12060 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id); 12061 12062 /* Free the route if we got one back */ 12063 if (ro.ro_rt) 12064 RTFREE(ro.ro_rt); 12065 } 12066 #endif 12067 SCTP_STAT_INCR(sctps_sendpackets); 12068 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 12069 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 12070 } 12071 12072 void 12073 sctp_send_operr_to(struct mbuf *m, int iphlen, struct mbuf *scm, uint32_t vtag, 12074 uint32_t vrf_id, uint16_t port) 12075 { 12076 struct mbuf *o_pak; 12077 struct sctphdr *sh, *sh_out; 12078 struct sctp_chunkhdr *ch; 12079 struct ip *iph; 12080 struct udphdr *udp = NULL; 12081 struct mbuf *mout; 12082 int iphlen_out, len; 12083 12084 #ifdef INET 12085 struct ip *iph_out; 12086 12087 #endif 12088 #ifdef INET6 12089 struct ip6_hdr *ip6, *ip6_out; 12090 12091 #endif 12092 12093 iph = mtod(m, struct ip *); 12094 sh = (struct sctphdr *)((caddr_t)iph + iphlen); 12095 switch (iph->ip_v) { 12096 #ifdef INET 12097 case IPVERSION: 12098 len = (sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)); 12099 break; 12100 #endif 12101 #ifdef INET6 12102 case IPV6_VERSION >> 4: 12103 len = (sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)); 12104 break; 12105 #endif 12106 default: 12107 if (scm) { 12108 sctp_m_freem(scm); 12109 } 12110 return; 12111 } 12112 if (port) { 12113 len += sizeof(struct udphdr); 12114 } 12115 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA); 12116 if (mout == NULL) { 12117 if (scm) { 12118 sctp_m_freem(scm); 12119 } 12120 return; 12121 } 12122 SCTP_BUF_RESV_UF(mout, max_linkhdr); 12123 SCTP_BUF_LEN(mout) = len; 12124 SCTP_BUF_NEXT(mout) = scm; 12125 if (m->m_flags & M_FLOWID) { 12126 mout->m_pkthdr.flowid = m->m_pkthdr.flowid; 12127 mout->m_flags |= M_FLOWID; 12128 } 12129 #ifdef INET 12130 iph_out = NULL; 12131 #endif 12132 #ifdef INET6 12133 ip6_out = NULL; 12134 #endif 12135 switch (iph->ip_v) { 12136 #ifdef INET 12137 case IPVERSION: 12138 iph_out = mtod(mout, struct ip *); 12139 12140 /* Fill in the IP header for the ABORT */ 12141 iph_out->ip_v = IPVERSION; 12142 iph_out->ip_hl = (sizeof(struct ip) / 4); 12143 iph_out->ip_tos = (u_char)0; 12144 iph_out->ip_id = 0; 12145 iph_out->ip_off = 0; 12146 iph_out->ip_ttl = MAXTTL; 12147 if (port) { 12148 iph_out->ip_p = IPPROTO_UDP; 12149 } else { 12150 iph_out->ip_p = IPPROTO_SCTP; 12151 } 12152 iph_out->ip_src.s_addr = iph->ip_dst.s_addr; 12153 iph_out->ip_dst.s_addr = iph->ip_src.s_addr; 12154 /* let IP layer calculate this */ 12155 iph_out->ip_sum = 0; 12156 12157 iphlen_out = sizeof(struct ip); 12158 sh_out = (struct sctphdr *)((caddr_t)iph_out + iphlen_out); 12159 break; 12160 #endif 12161 #ifdef INET6 12162 case IPV6_VERSION >> 4: 12163 ip6 = (struct ip6_hdr *)iph; 12164 ip6_out = mtod(mout, struct ip6_hdr *); 12165 12166 /* Fill in the IP6 header for the ABORT */ 12167 ip6_out->ip6_flow = ip6->ip6_flow; 12168 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim); 12169 if (port) { 12170 ip6_out->ip6_nxt = IPPROTO_UDP; 12171 } else { 12172 ip6_out->ip6_nxt = IPPROTO_SCTP; 12173 } 12174 ip6_out->ip6_src = ip6->ip6_dst; 12175 ip6_out->ip6_dst = ip6->ip6_src; 12176 12177 iphlen_out = sizeof(struct ip6_hdr); 12178 sh_out = (struct sctphdr *)((caddr_t)ip6_out + iphlen_out); 12179 break; 12180 #endif /* INET6 */ 12181 default: 12182 /* Currently not supported */ 12183 sctp_m_freem(mout); 12184 return; 12185 } 12186 12187 udp = (struct udphdr *)sh_out; 12188 if (port) { 12189 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 12190 udp->uh_dport = port; 12191 /* set udp->uh_ulen later */ 12192 udp->uh_sum = 0; 12193 iphlen_out += sizeof(struct udphdr); 12194 sh_out = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); 12195 } 12196 sh_out->src_port = sh->dest_port; 12197 sh_out->dest_port = sh->src_port; 12198 sh_out->v_tag = vtag; 12199 sh_out->checksum = 0; 12200 12201 ch = (struct sctp_chunkhdr *)((caddr_t)sh_out + sizeof(struct sctphdr)); 12202 ch->chunk_type = SCTP_OPERATION_ERROR; 12203 ch->chunk_flags = 0; 12204 12205 if (scm) { 12206 struct mbuf *m_tmp = scm; 12207 int cause_len = 0; 12208 12209 /* get length of the err_cause chain */ 12210 while (m_tmp != NULL) { 12211 cause_len += SCTP_BUF_LEN(m_tmp); 12212 m_tmp = SCTP_BUF_NEXT(m_tmp); 12213 } 12214 len = SCTP_BUF_LEN(mout) + cause_len; 12215 if (cause_len % 4) { 12216 /* need pad at end of chunk */ 12217 uint32_t cpthis = 0; 12218 int padlen; 12219 12220 padlen = 4 - (len % 4); 12221 m_copyback(mout, len, padlen, (caddr_t)&cpthis); 12222 len += padlen; 12223 } 12224 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len); 12225 } else { 12226 len = SCTP_BUF_LEN(mout); 12227 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr)); 12228 } 12229 12230 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 12231 /* no mbuf's */ 12232 sctp_m_freem(mout); 12233 return; 12234 } 12235 #ifdef INET 12236 if (iph_out != NULL) { 12237 sctp_route_t ro; 12238 int ret; 12239 12240 /* zap the stack pointer to the route */ 12241 bzero(&ro, sizeof ro); 12242 if (port) { 12243 udp->uh_ulen = htons(len - sizeof(struct ip)); 12244 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 12245 } 12246 /* set IPv4 length */ 12247 iph_out->ip_len = len; 12248 /* out it goes */ 12249 #ifdef SCTP_PACKET_LOGGING 12250 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 12251 sctp_packet_log(mout, len); 12252 #endif 12253 SCTP_ATTACH_CHAIN(o_pak, mout, len); 12254 if (port) { 12255 #if defined(SCTP_WITH_NO_CSUM) 12256 SCTP_STAT_INCR(sctps_sendnocrc); 12257 #else 12258 sh_out->checksum = sctp_calculate_cksum(mout, iphlen_out); 12259 SCTP_STAT_INCR(sctps_sendswcrc); 12260 #endif 12261 SCTP_ENABLE_UDP_CSUM(o_pak); 12262 } else { 12263 #if defined(SCTP_WITH_NO_CSUM) 12264 SCTP_STAT_INCR(sctps_sendnocrc); 12265 #else 12266 mout->m_pkthdr.csum_flags = CSUM_SCTP; 12267 mout->m_pkthdr.csum_data = 0; 12268 SCTP_STAT_INCR(sctps_sendhwcrc); 12269 #endif 12270 } 12271 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id); 12272 12273 /* Free the route if we got one back */ 12274 if (ro.ro_rt) 12275 RTFREE(ro.ro_rt); 12276 } 12277 #endif 12278 #ifdef INET6 12279 if (ip6_out != NULL) { 12280 struct route_in6 ro; 12281 int ret; 12282 struct ifnet *ifp = NULL; 12283 12284 /* zap the stack pointer to the route */ 12285 bzero(&ro, sizeof(ro)); 12286 if (port) { 12287 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr)); 12288 } 12289 ip6_out->ip6_plen = len - sizeof(*ip6_out); 12290 #ifdef SCTP_PACKET_LOGGING 12291 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 12292 sctp_packet_log(mout, len); 12293 #endif 12294 SCTP_ATTACH_CHAIN(o_pak, mout, len); 12295 if (port) { 12296 #if defined(SCTP_WITH_NO_CSUM) 12297 SCTP_STAT_INCR(sctps_sendnocrc); 12298 #else 12299 sh_out->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 12300 SCTP_STAT_INCR(sctps_sendswcrc); 12301 #endif 12302 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) { 12303 udp->uh_sum = 0xffff; 12304 } 12305 } else { 12306 #if defined(SCTP_WITH_NO_CSUM) 12307 SCTP_STAT_INCR(sctps_sendnocrc); 12308 #else 12309 mout->m_pkthdr.csum_flags = CSUM_SCTP; 12310 mout->m_pkthdr.csum_data = 0; 12311 SCTP_STAT_INCR(sctps_sendhwcrc); 12312 #endif 12313 } 12314 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id); 12315 12316 /* Free the route if we got one back */ 12317 if (ro.ro_rt) 12318 RTFREE(ro.ro_rt); 12319 } 12320 #endif 12321 SCTP_STAT_INCR(sctps_sendpackets); 12322 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 12323 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 12324 } 12325 12326 static struct mbuf * 12327 sctp_copy_resume(struct sctp_stream_queue_pending *sp, 12328 struct uio *uio, 12329 struct sctp_sndrcvinfo *srcv, 12330 int max_send_len, 12331 int user_marks_eor, 12332 int *error, 12333 uint32_t * sndout, 12334 struct mbuf **new_tail) 12335 { 12336 struct mbuf *m; 12337 12338 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0, 12339 (M_PKTHDR | (user_marks_eor ? M_EOR : 0))); 12340 if (m == NULL) { 12341 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12342 *error = ENOMEM; 12343 } else { 12344 *sndout = m_length(m, NULL); 12345 *new_tail = m_last(m); 12346 } 12347 return (m); 12348 } 12349 12350 static int 12351 sctp_copy_one(struct sctp_stream_queue_pending *sp, 12352 struct uio *uio, 12353 int resv_upfront) 12354 { 12355 int left; 12356 12357 left = sp->length; 12358 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length, 12359 resv_upfront, 0); 12360 if (sp->data == NULL) { 12361 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12362 return (ENOMEM); 12363 } 12364 sp->tail_mbuf = m_last(sp->data); 12365 return (0); 12366 } 12367 12368 12369 12370 static struct sctp_stream_queue_pending * 12371 sctp_copy_it_in(struct sctp_tcb *stcb, 12372 struct sctp_association *asoc, 12373 struct sctp_sndrcvinfo *srcv, 12374 struct uio *uio, 12375 struct sctp_nets *net, 12376 int max_send_len, 12377 int user_marks_eor, 12378 int *error, 12379 int non_blocking) 12380 { 12381 /*- 12382 * This routine must be very careful in its work. Protocol 12383 * processing is up and running so care must be taken to spl...() 12384 * when you need to do something that may effect the stcb/asoc. The 12385 * sb is locked however. When data is copied the protocol processing 12386 * should be enabled since this is a slower operation... 12387 */ 12388 struct sctp_stream_queue_pending *sp = NULL; 12389 int resv_in_first; 12390 12391 *error = 0; 12392 /* Now can we send this? */ 12393 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 12394 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 12395 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 12396 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 12397 /* got data while shutting down */ 12398 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12399 *error = ECONNRESET; 12400 goto out_now; 12401 } 12402 sctp_alloc_a_strmoq(stcb, sp); 12403 if (sp == NULL) { 12404 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12405 *error = ENOMEM; 12406 goto out_now; 12407 } 12408 sp->act_flags = 0; 12409 sp->sender_all_done = 0; 12410 sp->sinfo_flags = srcv->sinfo_flags; 12411 sp->timetolive = srcv->sinfo_timetolive; 12412 sp->ppid = srcv->sinfo_ppid; 12413 sp->context = srcv->sinfo_context; 12414 sp->strseq = 0; 12415 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 12416 12417 sp->stream = srcv->sinfo_stream; 12418 sp->length = min(uio->uio_resid, max_send_len); 12419 if ((sp->length == (uint32_t) uio->uio_resid) && 12420 ((user_marks_eor == 0) || 12421 (srcv->sinfo_flags & SCTP_EOF) || 12422 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { 12423 sp->msg_is_complete = 1; 12424 } else { 12425 sp->msg_is_complete = 0; 12426 } 12427 sp->sender_all_done = 0; 12428 sp->some_taken = 0; 12429 sp->put_last_out = 0; 12430 resv_in_first = sizeof(struct sctp_data_chunk); 12431 sp->data = sp->tail_mbuf = NULL; 12432 if (sp->length == 0) { 12433 *error = 0; 12434 goto skip_copy; 12435 } 12436 if (srcv->sinfo_keynumber_valid) { 12437 sp->auth_keyid = srcv->sinfo_keynumber; 12438 } else { 12439 sp->auth_keyid = stcb->asoc.authinfo.active_keyid; 12440 } 12441 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { 12442 sctp_auth_key_acquire(stcb, sp->auth_keyid); 12443 sp->holds_key_ref = 1; 12444 } 12445 *error = sctp_copy_one(sp, uio, resv_in_first); 12446 skip_copy: 12447 if (*error) { 12448 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 12449 sp = NULL; 12450 } else { 12451 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 12452 sp->net = net; 12453 atomic_add_int(&sp->net->ref_count, 1); 12454 } else { 12455 sp->net = NULL; 12456 } 12457 sctp_set_prsctp_policy(sp); 12458 } 12459 out_now: 12460 return (sp); 12461 } 12462 12463 12464 int 12465 sctp_sosend(struct socket *so, 12466 struct sockaddr *addr, 12467 struct uio *uio, 12468 struct mbuf *top, 12469 struct mbuf *control, 12470 int flags, 12471 struct thread *p 12472 ) 12473 { 12474 int error, use_sndinfo = 0; 12475 struct sctp_sndrcvinfo sndrcvninfo; 12476 struct sockaddr *addr_to_use; 12477 12478 #if defined(INET) && defined(INET6) 12479 struct sockaddr_in sin; 12480 12481 #endif 12482 12483 if (control) { 12484 /* process cmsg snd/rcv info (maybe a assoc-id) */ 12485 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control, 12486 sizeof(sndrcvninfo))) { 12487 /* got one */ 12488 use_sndinfo = 1; 12489 } 12490 } 12491 addr_to_use = addr; 12492 #if defined(INET) && defined(INET6) 12493 if ((addr) && (addr->sa_family == AF_INET6)) { 12494 struct sockaddr_in6 *sin6; 12495 12496 sin6 = (struct sockaddr_in6 *)addr; 12497 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 12498 in6_sin6_2_sin(&sin, sin6); 12499 addr_to_use = (struct sockaddr *)&sin; 12500 } 12501 } 12502 #endif 12503 error = sctp_lower_sosend(so, addr_to_use, uio, top, 12504 control, 12505 flags, 12506 use_sndinfo ? &sndrcvninfo : NULL 12507 ,p 12508 ); 12509 return (error); 12510 } 12511 12512 12513 int 12514 sctp_lower_sosend(struct socket *so, 12515 struct sockaddr *addr, 12516 struct uio *uio, 12517 struct mbuf *i_pak, 12518 struct mbuf *control, 12519 int flags, 12520 struct sctp_sndrcvinfo *srcv 12521 , 12522 struct thread *p 12523 ) 12524 { 12525 unsigned int sndlen = 0, max_len; 12526 int error, len; 12527 struct mbuf *top = NULL; 12528 int queue_only = 0, queue_only_for_init = 0; 12529 int free_cnt_applied = 0; 12530 int un_sent; 12531 int now_filled = 0; 12532 unsigned int inqueue_bytes = 0; 12533 struct sctp_block_entry be; 12534 struct sctp_inpcb *inp; 12535 struct sctp_tcb *stcb = NULL; 12536 struct timeval now; 12537 struct sctp_nets *net; 12538 struct sctp_association *asoc; 12539 struct sctp_inpcb *t_inp; 12540 int user_marks_eor; 12541 int create_lock_applied = 0; 12542 int nagle_applies = 0; 12543 int some_on_control = 0; 12544 int got_all_of_the_send = 0; 12545 int hold_tcblock = 0; 12546 int non_blocking = 0; 12547 uint32_t local_add_more, local_soresv = 0; 12548 uint16_t port; 12549 uint16_t sinfo_flags; 12550 sctp_assoc_t sinfo_assoc_id; 12551 12552 error = 0; 12553 net = NULL; 12554 stcb = NULL; 12555 asoc = NULL; 12556 12557 t_inp = inp = (struct sctp_inpcb *)so->so_pcb; 12558 if (inp == NULL) { 12559 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12560 error = EINVAL; 12561 if (i_pak) { 12562 SCTP_RELEASE_PKT(i_pak); 12563 } 12564 return (error); 12565 } 12566 if ((uio == NULL) && (i_pak == NULL)) { 12567 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12568 return (EINVAL); 12569 } 12570 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR); 12571 atomic_add_int(&inp->total_sends, 1); 12572 if (uio) { 12573 if (uio->uio_resid < 0) { 12574 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12575 return (EINVAL); 12576 } 12577 sndlen = uio->uio_resid; 12578 } else { 12579 top = SCTP_HEADER_TO_CHAIN(i_pak); 12580 sndlen = SCTP_HEADER_LEN(i_pak); 12581 } 12582 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n", 12583 addr, 12584 sndlen); 12585 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 12586 (inp->sctp_socket->so_qlimit)) { 12587 /* The listener can NOT send */ 12588 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); 12589 error = ENOTCONN; 12590 goto out_unlocked; 12591 } 12592 /** 12593 * Pre-screen address, if one is given the sin-len 12594 * must be set correctly! 12595 */ 12596 if (addr) { 12597 union sctp_sockstore *raddr = (union sctp_sockstore *)addr; 12598 12599 switch (raddr->sa.sa_family) { 12600 #if defined(INET) 12601 case AF_INET: 12602 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) { 12603 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12604 error = EINVAL; 12605 goto out_unlocked; 12606 } 12607 port = raddr->sin.sin_port; 12608 break; 12609 #endif 12610 #if defined(INET6) 12611 case AF_INET6: 12612 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) { 12613 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12614 error = EINVAL; 12615 goto out_unlocked; 12616 } 12617 port = raddr->sin6.sin6_port; 12618 break; 12619 #endif 12620 default: 12621 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT); 12622 error = EAFNOSUPPORT; 12623 goto out_unlocked; 12624 } 12625 } else 12626 port = 0; 12627 12628 if (srcv) { 12629 sinfo_flags = srcv->sinfo_flags; 12630 sinfo_assoc_id = srcv->sinfo_assoc_id; 12631 if (INVALID_SINFO_FLAG(sinfo_flags) || 12632 PR_SCTP_INVALID_POLICY(sinfo_flags)) { 12633 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12634 error = EINVAL; 12635 goto out_unlocked; 12636 } 12637 if (srcv->sinfo_flags) 12638 SCTP_STAT_INCR(sctps_sends_with_flags); 12639 } else { 12640 sinfo_flags = inp->def_send.sinfo_flags; 12641 sinfo_assoc_id = inp->def_send.sinfo_assoc_id; 12642 } 12643 if (sinfo_flags & SCTP_SENDALL) { 12644 /* its a sendall */ 12645 error = sctp_sendall(inp, uio, top, srcv); 12646 top = NULL; 12647 goto out_unlocked; 12648 } 12649 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) { 12650 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12651 error = EINVAL; 12652 goto out_unlocked; 12653 } 12654 /* now we must find the assoc */ 12655 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) || 12656 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 12657 SCTP_INP_RLOCK(inp); 12658 stcb = LIST_FIRST(&inp->sctp_asoc_list); 12659 if (stcb) { 12660 SCTP_TCB_LOCK(stcb); 12661 hold_tcblock = 1; 12662 } 12663 SCTP_INP_RUNLOCK(inp); 12664 } else if (sinfo_assoc_id) { 12665 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0); 12666 } else if (addr) { 12667 /*- 12668 * Since we did not use findep we must 12669 * increment it, and if we don't find a tcb 12670 * decrement it. 12671 */ 12672 SCTP_INP_WLOCK(inp); 12673 SCTP_INP_INCR_REF(inp); 12674 SCTP_INP_WUNLOCK(inp); 12675 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 12676 if (stcb == NULL) { 12677 SCTP_INP_WLOCK(inp); 12678 SCTP_INP_DECR_REF(inp); 12679 SCTP_INP_WUNLOCK(inp); 12680 } else { 12681 hold_tcblock = 1; 12682 } 12683 } 12684 if ((stcb == NULL) && (addr)) { 12685 /* Possible implicit send? */ 12686 SCTP_ASOC_CREATE_LOCK(inp); 12687 create_lock_applied = 1; 12688 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || 12689 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 12690 /* Should I really unlock ? */ 12691 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12692 error = EINVAL; 12693 goto out_unlocked; 12694 12695 } 12696 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) && 12697 (addr->sa_family == AF_INET6)) { 12698 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12699 error = EINVAL; 12700 goto out_unlocked; 12701 } 12702 SCTP_INP_WLOCK(inp); 12703 SCTP_INP_INCR_REF(inp); 12704 SCTP_INP_WUNLOCK(inp); 12705 /* With the lock applied look again */ 12706 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 12707 if ((stcb == NULL) && (control != NULL) && (port > 0)) { 12708 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error); 12709 } 12710 if (stcb == NULL) { 12711 SCTP_INP_WLOCK(inp); 12712 SCTP_INP_DECR_REF(inp); 12713 SCTP_INP_WUNLOCK(inp); 12714 } else { 12715 hold_tcblock = 1; 12716 } 12717 if (error) { 12718 goto out_unlocked; 12719 } 12720 if (t_inp != inp) { 12721 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); 12722 error = ENOTCONN; 12723 goto out_unlocked; 12724 } 12725 } 12726 if (stcb == NULL) { 12727 if (addr == NULL) { 12728 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); 12729 error = ENOENT; 12730 goto out_unlocked; 12731 } else { 12732 /* We must go ahead and start the INIT process */ 12733 uint32_t vrf_id; 12734 12735 if ((sinfo_flags & SCTP_ABORT) || 12736 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) { 12737 /*- 12738 * User asks to abort a non-existant assoc, 12739 * or EOF a non-existant assoc with no data 12740 */ 12741 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); 12742 error = ENOENT; 12743 goto out_unlocked; 12744 } 12745 /* get an asoc/stcb struct */ 12746 vrf_id = inp->def_vrf_id; 12747 #ifdef INVARIANTS 12748 if (create_lock_applied == 0) { 12749 panic("Error, should hold create lock and I don't?"); 12750 } 12751 #endif 12752 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 12753 p 12754 ); 12755 if (stcb == NULL) { 12756 /* Error is setup for us in the call */ 12757 goto out_unlocked; 12758 } 12759 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 12760 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 12761 /* 12762 * Set the connected flag so we can queue 12763 * data 12764 */ 12765 soisconnecting(so); 12766 } 12767 hold_tcblock = 1; 12768 if (create_lock_applied) { 12769 SCTP_ASOC_CREATE_UNLOCK(inp); 12770 create_lock_applied = 0; 12771 } else { 12772 SCTP_PRINTF("Huh-3? create lock should have been on??\n"); 12773 } 12774 /* 12775 * Turn on queue only flag to prevent data from 12776 * being sent 12777 */ 12778 queue_only = 1; 12779 asoc = &stcb->asoc; 12780 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); 12781 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 12782 12783 /* initialize authentication params for the assoc */ 12784 sctp_initialize_auth_params(inp, stcb); 12785 12786 if (control) { 12787 if (sctp_process_cmsgs_for_init(stcb, control, &error)) { 12788 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7); 12789 hold_tcblock = 0; 12790 stcb = NULL; 12791 goto out_unlocked; 12792 } 12793 } 12794 /* out with the INIT */ 12795 queue_only_for_init = 1; 12796 /*- 12797 * we may want to dig in after this call and adjust the MTU 12798 * value. It defaulted to 1500 (constant) but the ro 12799 * structure may now have an update and thus we may need to 12800 * change it BEFORE we append the message. 12801 */ 12802 } 12803 } else 12804 asoc = &stcb->asoc; 12805 if (srcv == NULL) 12806 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send; 12807 if (srcv->sinfo_flags & SCTP_ADDR_OVER) { 12808 if (addr) 12809 net = sctp_findnet(stcb, addr); 12810 else 12811 net = NULL; 12812 if ((net == NULL) || 12813 ((port != 0) && (port != stcb->rport))) { 12814 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12815 error = EINVAL; 12816 goto out_unlocked; 12817 } 12818 } else { 12819 if (stcb->asoc.alternate) { 12820 net = stcb->asoc.alternate; 12821 } else { 12822 net = stcb->asoc.primary_destination; 12823 } 12824 } 12825 atomic_add_int(&stcb->total_sends, 1); 12826 /* Keep the stcb from being freed under our feet */ 12827 atomic_add_int(&asoc->refcnt, 1); 12828 free_cnt_applied = 1; 12829 12830 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) { 12831 if (sndlen > asoc->smallest_mtu) { 12832 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12833 error = EMSGSIZE; 12834 goto out_unlocked; 12835 } 12836 } 12837 if ((SCTP_SO_IS_NBIO(so) 12838 || (flags & MSG_NBIO) 12839 )) { 12840 non_blocking = 1; 12841 } 12842 /* would we block? */ 12843 if (non_blocking) { 12844 if (hold_tcblock == 0) { 12845 SCTP_TCB_LOCK(stcb); 12846 hold_tcblock = 1; 12847 } 12848 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12849 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) || 12850 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12851 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK); 12852 if (sndlen > SCTP_SB_LIMIT_SND(so)) 12853 error = EMSGSIZE; 12854 else 12855 error = EWOULDBLOCK; 12856 goto out_unlocked; 12857 } 12858 stcb->asoc.sb_send_resv += sndlen; 12859 SCTP_TCB_UNLOCK(stcb); 12860 hold_tcblock = 0; 12861 } else { 12862 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen); 12863 } 12864 local_soresv = sndlen; 12865 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12866 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12867 error = ECONNRESET; 12868 goto out_unlocked; 12869 } 12870 if (create_lock_applied) { 12871 SCTP_ASOC_CREATE_UNLOCK(inp); 12872 create_lock_applied = 0; 12873 } 12874 if (asoc->stream_reset_outstanding) { 12875 /* 12876 * Can't queue any data while stream reset is underway. 12877 */ 12878 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN); 12879 error = EAGAIN; 12880 goto out_unlocked; 12881 } 12882 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 12883 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 12884 queue_only = 1; 12885 } 12886 /* we are now done with all control */ 12887 if (control) { 12888 sctp_m_freem(control); 12889 control = NULL; 12890 } 12891 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 12892 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 12893 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 12894 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 12895 if (srcv->sinfo_flags & SCTP_ABORT) { 12896 ; 12897 } else { 12898 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12899 error = ECONNRESET; 12900 goto out_unlocked; 12901 } 12902 } 12903 /* Ok, we will attempt a msgsnd :> */ 12904 if (p) { 12905 p->td_ru.ru_msgsnd++; 12906 } 12907 /* Are we aborting? */ 12908 if (srcv->sinfo_flags & SCTP_ABORT) { 12909 struct mbuf *mm; 12910 int tot_demand, tot_out = 0, max_out; 12911 12912 SCTP_STAT_INCR(sctps_sends_with_abort); 12913 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 12914 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 12915 /* It has to be up before we abort */ 12916 /* how big is the user initiated abort? */ 12917 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12918 error = EINVAL; 12919 goto out; 12920 } 12921 if (hold_tcblock) { 12922 SCTP_TCB_UNLOCK(stcb); 12923 hold_tcblock = 0; 12924 } 12925 if (top) { 12926 struct mbuf *cntm = NULL; 12927 12928 mm = sctp_get_mbuf_for_msg(1, 0, M_WAIT, 1, MT_DATA); 12929 if (sndlen != 0) { 12930 cntm = top; 12931 while (cntm) { 12932 tot_out += SCTP_BUF_LEN(cntm); 12933 cntm = SCTP_BUF_NEXT(cntm); 12934 } 12935 } 12936 tot_demand = (tot_out + sizeof(struct sctp_paramhdr)); 12937 } else { 12938 /* Must fit in a MTU */ 12939 tot_out = sndlen; 12940 tot_demand = (tot_out + sizeof(struct sctp_paramhdr)); 12941 if (tot_demand > SCTP_DEFAULT_ADD_MORE) { 12942 /* To big */ 12943 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12944 error = EMSGSIZE; 12945 goto out; 12946 } 12947 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA); 12948 } 12949 if (mm == NULL) { 12950 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12951 error = ENOMEM; 12952 goto out; 12953 } 12954 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr); 12955 max_out -= sizeof(struct sctp_abort_msg); 12956 if (tot_out > max_out) { 12957 tot_out = max_out; 12958 } 12959 if (mm) { 12960 struct sctp_paramhdr *ph; 12961 12962 /* now move forward the data pointer */ 12963 ph = mtod(mm, struct sctp_paramhdr *); 12964 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 12965 ph->param_length = htons((sizeof(struct sctp_paramhdr) + tot_out)); 12966 ph++; 12967 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr); 12968 if (top == NULL) { 12969 error = uiomove((caddr_t)ph, (int)tot_out, uio); 12970 if (error) { 12971 /*- 12972 * Here if we can't get his data we 12973 * still abort we just don't get to 12974 * send the users note :-0 12975 */ 12976 sctp_m_freem(mm); 12977 mm = NULL; 12978 } 12979 } else { 12980 if (sndlen != 0) { 12981 SCTP_BUF_NEXT(mm) = top; 12982 } 12983 } 12984 } 12985 if (hold_tcblock == 0) { 12986 SCTP_TCB_LOCK(stcb); 12987 hold_tcblock = 1; 12988 } 12989 atomic_add_int(&stcb->asoc.refcnt, -1); 12990 free_cnt_applied = 0; 12991 /* release this lock, otherwise we hang on ourselves */ 12992 sctp_abort_an_association(stcb->sctp_ep, stcb, 12993 SCTP_RESPONSE_TO_USER_REQ, 12994 mm, SCTP_SO_LOCKED); 12995 /* now relock the stcb so everything is sane */ 12996 hold_tcblock = 0; 12997 stcb = NULL; 12998 /* 12999 * In this case top is already chained to mm avoid double 13000 * free, since we free it below if top != NULL and driver 13001 * would free it after sending the packet out 13002 */ 13003 if (sndlen != 0) { 13004 top = NULL; 13005 } 13006 goto out_unlocked; 13007 } 13008 /* Calculate the maximum we can send */ 13009 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 13010 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { 13011 if (non_blocking) { 13012 /* we already checked for non-blocking above. */ 13013 max_len = sndlen; 13014 } else { 13015 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 13016 } 13017 } else { 13018 max_len = 0; 13019 } 13020 if (hold_tcblock) { 13021 SCTP_TCB_UNLOCK(stcb); 13022 hold_tcblock = 0; 13023 } 13024 /* Is the stream no. valid? */ 13025 if (srcv->sinfo_stream >= asoc->streamoutcnt) { 13026 /* Invalid stream number */ 13027 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 13028 error = EINVAL; 13029 goto out_unlocked; 13030 } 13031 if (asoc->strmout == NULL) { 13032 /* huh? software error */ 13033 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 13034 error = EFAULT; 13035 goto out_unlocked; 13036 } 13037 /* Unless E_EOR mode is on, we must make a send FIT in one call. */ 13038 if ((user_marks_eor == 0) && 13039 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) { 13040 /* It will NEVER fit */ 13041 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 13042 error = EMSGSIZE; 13043 goto out_unlocked; 13044 } 13045 if ((uio == NULL) && user_marks_eor) { 13046 /*- 13047 * We do not support eeor mode for 13048 * sending with mbuf chains (like sendfile). 13049 */ 13050 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 13051 error = EINVAL; 13052 goto out_unlocked; 13053 } 13054 if (user_marks_eor) { 13055 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold)); 13056 } else { 13057 /*- 13058 * For non-eeor the whole message must fit in 13059 * the socket send buffer. 13060 */ 13061 local_add_more = sndlen; 13062 } 13063 len = 0; 13064 if (non_blocking) { 13065 goto skip_preblock; 13066 } 13067 if (((max_len <= local_add_more) && 13068 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) || 13069 (max_len == 0) || 13070 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 13071 /* No room right now ! */ 13072 SOCKBUF_LOCK(&so->so_snd); 13073 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 13074 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) || 13075 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 13076 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n", 13077 (unsigned int)SCTP_SB_LIMIT_SND(so), 13078 inqueue_bytes, 13079 local_add_more, 13080 stcb->asoc.stream_queue_cnt, 13081 stcb->asoc.chunks_on_out_queue, 13082 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue)); 13083 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13084 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, so, asoc, sndlen); 13085 } 13086 be.error = 0; 13087 stcb->block_entry = &be; 13088 error = sbwait(&so->so_snd); 13089 stcb->block_entry = NULL; 13090 if (error || so->so_error || be.error) { 13091 if (error == 0) { 13092 if (so->so_error) 13093 error = so->so_error; 13094 if (be.error) { 13095 error = be.error; 13096 } 13097 } 13098 SOCKBUF_UNLOCK(&so->so_snd); 13099 goto out_unlocked; 13100 } 13101 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13102 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 13103 so, asoc, stcb->asoc.total_output_queue_size); 13104 } 13105 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 13106 goto out_unlocked; 13107 } 13108 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 13109 } 13110 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { 13111 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 13112 } else { 13113 max_len = 0; 13114 } 13115 SOCKBUF_UNLOCK(&so->so_snd); 13116 } 13117 skip_preblock: 13118 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 13119 goto out_unlocked; 13120 } 13121 /* 13122 * sndlen covers for mbuf case uio_resid covers for the non-mbuf 13123 * case NOTE: uio will be null when top/mbuf is passed 13124 */ 13125 if (sndlen == 0) { 13126 if (srcv->sinfo_flags & SCTP_EOF) { 13127 got_all_of_the_send = 1; 13128 goto dataless_eof; 13129 } else { 13130 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 13131 error = EINVAL; 13132 goto out; 13133 } 13134 } 13135 if (top == NULL) { 13136 struct sctp_stream_queue_pending *sp; 13137 struct sctp_stream_out *strm; 13138 uint32_t sndout; 13139 13140 SCTP_TCB_SEND_LOCK(stcb); 13141 if ((asoc->stream_locked) && 13142 (asoc->stream_locked_on != srcv->sinfo_stream)) { 13143 SCTP_TCB_SEND_UNLOCK(stcb); 13144 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 13145 error = EINVAL; 13146 goto out; 13147 } 13148 SCTP_TCB_SEND_UNLOCK(stcb); 13149 13150 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 13151 if (strm->last_msg_incomplete == 0) { 13152 do_a_copy_in: 13153 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error, non_blocking); 13154 if ((sp == NULL) || (error)) { 13155 goto out; 13156 } 13157 SCTP_TCB_SEND_LOCK(stcb); 13158 if (sp->msg_is_complete) { 13159 strm->last_msg_incomplete = 0; 13160 asoc->stream_locked = 0; 13161 } else { 13162 /* 13163 * Just got locked to this guy in case of an 13164 * interrupt. 13165 */ 13166 strm->last_msg_incomplete = 1; 13167 asoc->stream_locked = 1; 13168 asoc->stream_locked_on = srcv->sinfo_stream; 13169 sp->sender_all_done = 0; 13170 } 13171 sctp_snd_sb_alloc(stcb, sp->length); 13172 atomic_add_int(&asoc->stream_queue_cnt, 1); 13173 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) { 13174 sp->strseq = strm->next_sequence_sent; 13175 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_SCTP) { 13176 sctp_misc_ints(SCTP_STRMOUT_LOG_ASSIGN, 13177 (uintptr_t) stcb, sp->length, 13178 (uint32_t) ((srcv->sinfo_stream << 16) | sp->strseq), 0); 13179 } 13180 strm->next_sequence_sent++; 13181 } else { 13182 SCTP_STAT_INCR(sctps_sends_with_unord); 13183 } 13184 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 13185 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1); 13186 SCTP_TCB_SEND_UNLOCK(stcb); 13187 } else { 13188 SCTP_TCB_SEND_LOCK(stcb); 13189 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead); 13190 SCTP_TCB_SEND_UNLOCK(stcb); 13191 if (sp == NULL) { 13192 /* ???? Huh ??? last msg is gone */ 13193 #ifdef INVARIANTS 13194 panic("Warning: Last msg marked incomplete, yet nothing left?"); 13195 #else 13196 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n"); 13197 strm->last_msg_incomplete = 0; 13198 #endif 13199 goto do_a_copy_in; 13200 13201 } 13202 } 13203 while (uio->uio_resid > 0) { 13204 /* How much room do we have? */ 13205 struct mbuf *new_tail, *mm; 13206 13207 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 13208 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size; 13209 else 13210 max_len = 0; 13211 13212 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) || 13213 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) || 13214 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) { 13215 sndout = 0; 13216 new_tail = NULL; 13217 if (hold_tcblock) { 13218 SCTP_TCB_UNLOCK(stcb); 13219 hold_tcblock = 0; 13220 } 13221 mm = sctp_copy_resume(sp, uio, srcv, max_len, user_marks_eor, &error, &sndout, &new_tail); 13222 if ((mm == NULL) || error) { 13223 if (mm) { 13224 sctp_m_freem(mm); 13225 } 13226 goto out; 13227 } 13228 /* Update the mbuf and count */ 13229 SCTP_TCB_SEND_LOCK(stcb); 13230 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 13231 /* 13232 * we need to get out. Peer probably 13233 * aborted. 13234 */ 13235 sctp_m_freem(mm); 13236 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) { 13237 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 13238 error = ECONNRESET; 13239 } 13240 SCTP_TCB_SEND_UNLOCK(stcb); 13241 goto out; 13242 } 13243 if (sp->tail_mbuf) { 13244 /* tack it to the end */ 13245 SCTP_BUF_NEXT(sp->tail_mbuf) = mm; 13246 sp->tail_mbuf = new_tail; 13247 } else { 13248 /* A stolen mbuf */ 13249 sp->data = mm; 13250 sp->tail_mbuf = new_tail; 13251 } 13252 sctp_snd_sb_alloc(stcb, sndout); 13253 atomic_add_int(&sp->length, sndout); 13254 len += sndout; 13255 13256 /* Did we reach EOR? */ 13257 if ((uio->uio_resid == 0) && 13258 ((user_marks_eor == 0) || 13259 (srcv->sinfo_flags & SCTP_EOF) || 13260 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { 13261 sp->msg_is_complete = 1; 13262 } else { 13263 sp->msg_is_complete = 0; 13264 } 13265 SCTP_TCB_SEND_UNLOCK(stcb); 13266 } 13267 if (uio->uio_resid == 0) { 13268 /* got it all? */ 13269 continue; 13270 } 13271 /* PR-SCTP? */ 13272 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) { 13273 /* 13274 * This is ugly but we must assure locking 13275 * order 13276 */ 13277 if (hold_tcblock == 0) { 13278 SCTP_TCB_LOCK(stcb); 13279 hold_tcblock = 1; 13280 } 13281 sctp_prune_prsctp(stcb, asoc, srcv, sndlen); 13282 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 13283 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 13284 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 13285 else 13286 max_len = 0; 13287 if (max_len > 0) { 13288 continue; 13289 } 13290 SCTP_TCB_UNLOCK(stcb); 13291 hold_tcblock = 0; 13292 } 13293 /* wait for space now */ 13294 if (non_blocking) { 13295 /* Non-blocking io in place out */ 13296 goto skip_out_eof; 13297 } 13298 /* What about the INIT, send it maybe */ 13299 if (queue_only_for_init) { 13300 if (hold_tcblock == 0) { 13301 SCTP_TCB_LOCK(stcb); 13302 hold_tcblock = 1; 13303 } 13304 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 13305 /* a collision took us forward? */ 13306 queue_only = 0; 13307 } else { 13308 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 13309 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); 13310 queue_only = 1; 13311 } 13312 } 13313 if ((net->flight_size > net->cwnd) && 13314 (asoc->sctp_cmt_on_off == 0)) { 13315 SCTP_STAT_INCR(sctps_send_cwnd_avoid); 13316 queue_only = 1; 13317 } else if (asoc->ifp_had_enobuf) { 13318 SCTP_STAT_INCR(sctps_ifnomemqueued); 13319 if (net->flight_size > (2 * net->mtu)) { 13320 queue_only = 1; 13321 } 13322 asoc->ifp_had_enobuf = 0; 13323 } 13324 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 13325 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 13326 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 13327 (stcb->asoc.total_flight > 0) && 13328 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && 13329 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 13330 13331 /*- 13332 * Ok, Nagle is set on and we have data outstanding. 13333 * Don't send anything and let SACKs drive out the 13334 * data unless wen have a "full" segment to send. 13335 */ 13336 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13337 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 13338 } 13339 SCTP_STAT_INCR(sctps_naglequeued); 13340 nagle_applies = 1; 13341 } else { 13342 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13343 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 13344 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 13345 } 13346 SCTP_STAT_INCR(sctps_naglesent); 13347 nagle_applies = 0; 13348 } 13349 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13350 13351 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, 13352 nagle_applies, un_sent); 13353 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, 13354 stcb->asoc.total_flight, 13355 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); 13356 } 13357 if (queue_only_for_init) 13358 queue_only_for_init = 0; 13359 if ((queue_only == 0) && (nagle_applies == 0)) { 13360 /*- 13361 * need to start chunk output 13362 * before blocking.. note that if 13363 * a lock is already applied, then 13364 * the input via the net is happening 13365 * and I don't need to start output :-D 13366 */ 13367 if (hold_tcblock == 0) { 13368 if (SCTP_TCB_TRYLOCK(stcb)) { 13369 hold_tcblock = 1; 13370 sctp_chunk_output(inp, 13371 stcb, 13372 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13373 } 13374 } else { 13375 sctp_chunk_output(inp, 13376 stcb, 13377 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13378 } 13379 if (hold_tcblock == 1) { 13380 SCTP_TCB_UNLOCK(stcb); 13381 hold_tcblock = 0; 13382 } 13383 } 13384 SOCKBUF_LOCK(&so->so_snd); 13385 /*- 13386 * This is a bit strange, but I think it will 13387 * work. The total_output_queue_size is locked and 13388 * protected by the TCB_LOCK, which we just released. 13389 * There is a race that can occur between releasing it 13390 * above, and me getting the socket lock, where sacks 13391 * come in but we have not put the SB_WAIT on the 13392 * so_snd buffer to get the wakeup. After the LOCK 13393 * is applied the sack_processing will also need to 13394 * LOCK the so->so_snd to do the actual sowwakeup(). So 13395 * once we have the socket buffer lock if we recheck the 13396 * size we KNOW we will get to sleep safely with the 13397 * wakeup flag in place. 13398 */ 13399 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size + 13400 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) { 13401 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13402 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK, 13403 so, asoc, uio->uio_resid); 13404 } 13405 be.error = 0; 13406 stcb->block_entry = &be; 13407 error = sbwait(&so->so_snd); 13408 stcb->block_entry = NULL; 13409 13410 if (error || so->so_error || be.error) { 13411 if (error == 0) { 13412 if (so->so_error) 13413 error = so->so_error; 13414 if (be.error) { 13415 error = be.error; 13416 } 13417 } 13418 SOCKBUF_UNLOCK(&so->so_snd); 13419 goto out_unlocked; 13420 } 13421 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13422 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 13423 so, asoc, stcb->asoc.total_output_queue_size); 13424 } 13425 } 13426 SOCKBUF_UNLOCK(&so->so_snd); 13427 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 13428 goto out_unlocked; 13429 } 13430 } 13431 SCTP_TCB_SEND_LOCK(stcb); 13432 if (sp) { 13433 if (sp->msg_is_complete == 0) { 13434 strm->last_msg_incomplete = 1; 13435 asoc->stream_locked = 1; 13436 asoc->stream_locked_on = srcv->sinfo_stream; 13437 } else { 13438 sp->sender_all_done = 1; 13439 strm->last_msg_incomplete = 0; 13440 asoc->stream_locked = 0; 13441 } 13442 } else { 13443 SCTP_PRINTF("Huh no sp TSNH?\n"); 13444 strm->last_msg_incomplete = 0; 13445 asoc->stream_locked = 0; 13446 } 13447 SCTP_TCB_SEND_UNLOCK(stcb); 13448 if (uio->uio_resid == 0) { 13449 got_all_of_the_send = 1; 13450 } 13451 } else { 13452 /* We send in a 0, since we do NOT have any locks */ 13453 error = sctp_msg_append(stcb, net, top, srcv, 0); 13454 top = NULL; 13455 if (srcv->sinfo_flags & SCTP_EOF) { 13456 /* 13457 * This should only happen for Panda for the mbuf 13458 * send case, which does NOT yet support EEOR mode. 13459 * Thus, we can just set this flag to do the proper 13460 * EOF handling. 13461 */ 13462 got_all_of_the_send = 1; 13463 } 13464 } 13465 if (error) { 13466 goto out; 13467 } 13468 dataless_eof: 13469 /* EOF thing ? */ 13470 if ((srcv->sinfo_flags & SCTP_EOF) && 13471 (got_all_of_the_send == 1) && 13472 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) { 13473 int cnt; 13474 13475 SCTP_STAT_INCR(sctps_sends_with_eof); 13476 error = 0; 13477 if (hold_tcblock == 0) { 13478 SCTP_TCB_LOCK(stcb); 13479 hold_tcblock = 1; 13480 } 13481 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED); 13482 if (TAILQ_EMPTY(&asoc->send_queue) && 13483 TAILQ_EMPTY(&asoc->sent_queue) && 13484 (cnt == 0)) { 13485 if (asoc->locked_on_sending) { 13486 goto abort_anyway; 13487 } 13488 /* there is nothing queued to send, so I'm done... */ 13489 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 13490 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 13491 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 13492 struct sctp_nets *netp; 13493 13494 if (stcb->asoc.alternate) { 13495 netp = stcb->asoc.alternate; 13496 } else { 13497 netp = stcb->asoc.primary_destination; 13498 } 13499 /* only send SHUTDOWN the first time through */ 13500 sctp_send_shutdown(stcb, netp); 13501 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 13502 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 13503 } 13504 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 13505 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 13506 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 13507 netp); 13508 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 13509 asoc->primary_destination); 13510 } 13511 } else { 13512 /*- 13513 * we still got (or just got) data to send, so set 13514 * SHUTDOWN_PENDING 13515 */ 13516 /*- 13517 * XXX sockets draft says that SCTP_EOF should be 13518 * sent with no data. currently, we will allow user 13519 * data to be sent first and move to 13520 * SHUTDOWN-PENDING 13521 */ 13522 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 13523 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 13524 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 13525 if (hold_tcblock == 0) { 13526 SCTP_TCB_LOCK(stcb); 13527 hold_tcblock = 1; 13528 } 13529 if (asoc->locked_on_sending) { 13530 /* Locked to send out the data */ 13531 struct sctp_stream_queue_pending *sp; 13532 13533 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 13534 if (sp) { 13535 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 13536 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 13537 } 13538 } 13539 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 13540 if (TAILQ_EMPTY(&asoc->send_queue) && 13541 TAILQ_EMPTY(&asoc->sent_queue) && 13542 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 13543 abort_anyway: 13544 if (free_cnt_applied) { 13545 atomic_add_int(&stcb->asoc.refcnt, -1); 13546 free_cnt_applied = 0; 13547 } 13548 sctp_abort_an_association(stcb->sctp_ep, stcb, 13549 SCTP_RESPONSE_TO_USER_REQ, 13550 NULL, SCTP_SO_LOCKED); 13551 /* 13552 * now relock the stcb so everything 13553 * is sane 13554 */ 13555 hold_tcblock = 0; 13556 stcb = NULL; 13557 goto out; 13558 } 13559 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 13560 asoc->primary_destination); 13561 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY); 13562 } 13563 } 13564 } 13565 skip_out_eof: 13566 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { 13567 some_on_control = 1; 13568 } 13569 if (queue_only_for_init) { 13570 if (hold_tcblock == 0) { 13571 SCTP_TCB_LOCK(stcb); 13572 hold_tcblock = 1; 13573 } 13574 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 13575 /* a collision took us forward? */ 13576 queue_only = 0; 13577 } else { 13578 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 13579 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT); 13580 queue_only = 1; 13581 } 13582 } 13583 if ((net->flight_size > net->cwnd) && 13584 (stcb->asoc.sctp_cmt_on_off == 0)) { 13585 SCTP_STAT_INCR(sctps_send_cwnd_avoid); 13586 queue_only = 1; 13587 } else if (asoc->ifp_had_enobuf) { 13588 SCTP_STAT_INCR(sctps_ifnomemqueued); 13589 if (net->flight_size > (2 * net->mtu)) { 13590 queue_only = 1; 13591 } 13592 asoc->ifp_had_enobuf = 0; 13593 } 13594 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 13595 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 13596 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 13597 (stcb->asoc.total_flight > 0) && 13598 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && 13599 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 13600 /*- 13601 * Ok, Nagle is set on and we have data outstanding. 13602 * Don't send anything and let SACKs drive out the 13603 * data unless wen have a "full" segment to send. 13604 */ 13605 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13606 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 13607 } 13608 SCTP_STAT_INCR(sctps_naglequeued); 13609 nagle_applies = 1; 13610 } else { 13611 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13612 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 13613 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 13614 } 13615 SCTP_STAT_INCR(sctps_naglesent); 13616 nagle_applies = 0; 13617 } 13618 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13619 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, 13620 nagle_applies, un_sent); 13621 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, 13622 stcb->asoc.total_flight, 13623 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); 13624 } 13625 if (queue_only_for_init) 13626 queue_only_for_init = 0; 13627 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) { 13628 /* we can attempt to send too. */ 13629 if (hold_tcblock == 0) { 13630 /* 13631 * If there is activity recv'ing sacks no need to 13632 * send 13633 */ 13634 if (SCTP_TCB_TRYLOCK(stcb)) { 13635 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13636 hold_tcblock = 1; 13637 } 13638 } else { 13639 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13640 } 13641 } else if ((queue_only == 0) && 13642 (stcb->asoc.peers_rwnd == 0) && 13643 (stcb->asoc.total_flight == 0)) { 13644 /* We get to have a probe outstanding */ 13645 if (hold_tcblock == 0) { 13646 hold_tcblock = 1; 13647 SCTP_TCB_LOCK(stcb); 13648 } 13649 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13650 } else if (some_on_control) { 13651 int num_out, reason, frag_point; 13652 13653 /* Here we do control only */ 13654 if (hold_tcblock == 0) { 13655 hold_tcblock = 1; 13656 SCTP_TCB_LOCK(stcb); 13657 } 13658 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 13659 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 13660 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED); 13661 } 13662 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n", 13663 queue_only, stcb->asoc.peers_rwnd, un_sent, 13664 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue, 13665 stcb->asoc.total_output_queue_size, error); 13666 13667 out: 13668 out_unlocked: 13669 13670 if (local_soresv && stcb) { 13671 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen); 13672 local_soresv = 0; 13673 } 13674 if (create_lock_applied) { 13675 SCTP_ASOC_CREATE_UNLOCK(inp); 13676 create_lock_applied = 0; 13677 } 13678 if ((stcb) && hold_tcblock) { 13679 SCTP_TCB_UNLOCK(stcb); 13680 } 13681 if (stcb && free_cnt_applied) { 13682 atomic_add_int(&stcb->asoc.refcnt, -1); 13683 } 13684 #ifdef INVARIANTS 13685 if (stcb) { 13686 if (mtx_owned(&stcb->tcb_mtx)) { 13687 panic("Leaving with tcb mtx owned?"); 13688 } 13689 if (mtx_owned(&stcb->tcb_send_mtx)) { 13690 panic("Leaving with tcb send mtx owned?"); 13691 } 13692 } 13693 #endif 13694 #ifdef INVARIANTS 13695 if (inp) { 13696 sctp_validate_no_locks(inp); 13697 } else { 13698 printf("Warning - inp is NULL so cant validate locks\n"); 13699 } 13700 #endif 13701 if (top) { 13702 sctp_m_freem(top); 13703 } 13704 if (control) { 13705 sctp_m_freem(control); 13706 } 13707 return (error); 13708 } 13709 13710 13711 /* 13712 * generate an AUTHentication chunk, if required 13713 */ 13714 struct mbuf * 13715 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end, 13716 struct sctp_auth_chunk **auth_ret, uint32_t * offset, 13717 struct sctp_tcb *stcb, uint8_t chunk) 13718 { 13719 struct mbuf *m_auth; 13720 struct sctp_auth_chunk *auth; 13721 int chunk_len; 13722 13723 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) || 13724 (stcb == NULL)) 13725 return (m); 13726 13727 /* sysctl disabled auth? */ 13728 if (SCTP_BASE_SYSCTL(sctp_auth_disable)) 13729 return (m); 13730 13731 /* peer doesn't do auth... */ 13732 if (!stcb->asoc.peer_supports_auth) { 13733 return (m); 13734 } 13735 /* does the requested chunk require auth? */ 13736 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) { 13737 return (m); 13738 } 13739 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER); 13740 if (m_auth == NULL) { 13741 /* no mbuf's */ 13742 return (m); 13743 } 13744 /* reserve some space if this will be the first mbuf */ 13745 if (m == NULL) 13746 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD); 13747 /* fill in the AUTH chunk details */ 13748 auth = mtod(m_auth, struct sctp_auth_chunk *); 13749 bzero(auth, sizeof(*auth)); 13750 auth->ch.chunk_type = SCTP_AUTHENTICATION; 13751 auth->ch.chunk_flags = 0; 13752 chunk_len = sizeof(*auth) + 13753 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id); 13754 auth->ch.chunk_length = htons(chunk_len); 13755 auth->hmac_id = htons(stcb->asoc.peer_hmac_id); 13756 /* key id and hmac digest will be computed and filled in upon send */ 13757 13758 /* save the offset where the auth was inserted into the chain */ 13759 if (m != NULL) { 13760 struct mbuf *cn; 13761 13762 *offset = 0; 13763 cn = m; 13764 while (cn) { 13765 *offset += SCTP_BUF_LEN(cn); 13766 cn = SCTP_BUF_NEXT(cn); 13767 } 13768 } else 13769 *offset = 0; 13770 13771 /* update length and return pointer to the auth chunk */ 13772 SCTP_BUF_LEN(m_auth) = chunk_len; 13773 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0); 13774 if (auth_ret != NULL) 13775 *auth_ret = auth; 13776 13777 return (m); 13778 } 13779 13780 #ifdef INET6 13781 int 13782 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro) 13783 { 13784 struct nd_prefix *pfx = NULL; 13785 struct nd_pfxrouter *pfxrtr = NULL; 13786 struct sockaddr_in6 gw6; 13787 13788 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6) 13789 return (0); 13790 13791 /* get prefix entry of address */ 13792 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) { 13793 if (pfx->ndpr_stateflags & NDPRF_DETACHED) 13794 continue; 13795 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr, 13796 &src6->sin6_addr, &pfx->ndpr_mask)) 13797 break; 13798 } 13799 /* no prefix entry in the prefix list */ 13800 if (pfx == NULL) { 13801 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for "); 13802 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); 13803 return (0); 13804 } 13805 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is "); 13806 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); 13807 13808 /* search installed gateway from prefix entry */ 13809 for (pfxrtr = pfx->ndpr_advrtrs.lh_first; pfxrtr; pfxrtr = 13810 pfxrtr->pfr_next) { 13811 memset(&gw6, 0, sizeof(struct sockaddr_in6)); 13812 gw6.sin6_family = AF_INET6; 13813 gw6.sin6_len = sizeof(struct sockaddr_in6); 13814 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr, 13815 sizeof(struct in6_addr)); 13816 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is "); 13817 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6); 13818 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is "); 13819 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); 13820 if (sctp_cmpaddr((struct sockaddr *)&gw6, 13821 ro->ro_rt->rt_gateway)) { 13822 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n"); 13823 return (1); 13824 } 13825 } 13826 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n"); 13827 return (0); 13828 } 13829 13830 #endif 13831 13832 int 13833 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro) 13834 { 13835 #ifdef INET 13836 struct sockaddr_in *sin, *mask; 13837 struct ifaddr *ifa; 13838 struct in_addr srcnetaddr, gwnetaddr; 13839 13840 if (ro == NULL || ro->ro_rt == NULL || 13841 sifa->address.sa.sa_family != AF_INET) { 13842 return (0); 13843 } 13844 ifa = (struct ifaddr *)sifa->ifa; 13845 mask = (struct sockaddr_in *)(ifa->ifa_netmask); 13846 sin = (struct sockaddr_in *)&sifa->address.sin; 13847 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); 13848 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is "); 13849 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa); 13850 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr); 13851 13852 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway; 13853 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); 13854 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is "); 13855 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); 13856 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr); 13857 if (srcnetaddr.s_addr == gwnetaddr.s_addr) { 13858 return (1); 13859 } 13860 #endif 13861 return (0); 13862 }
Cache object: a5fe767f03d7c28981f7bf099a70eab3
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