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) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, 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 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD: releng/10.2/sys/netinet/sctp_output.c 284633 2015-06-20 08:25:27Z tuexen $"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_header.h> 41 #include <netinet/sctp_pcb.h> 42 #include <netinet/sctputil.h> 43 #include <netinet/sctp_output.h> 44 #include <netinet/sctp_uio.h> 45 #include <netinet/sctputil.h> 46 #include <netinet/sctp_auth.h> 47 #include <netinet/sctp_timer.h> 48 #include <netinet/sctp_asconf.h> 49 #include <netinet/sctp_indata.h> 50 #include <netinet/sctp_bsd_addr.h> 51 #include <netinet/sctp_input.h> 52 #include <netinet/sctp_crc32.h> 53 #if defined(INET) || defined(INET6) 54 #include <netinet/udp.h> 55 #endif 56 #include <netinet/udp_var.h> 57 #include <machine/in_cksum.h> 58 59 60 61 #define SCTP_MAX_GAPS_INARRAY 4 62 struct sack_track { 63 uint8_t right_edge; /* mergable on the right edge */ 64 uint8_t left_edge; /* mergable on the left edge */ 65 uint8_t num_entries; 66 uint8_t spare; 67 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY]; 68 }; 69 70 struct sack_track sack_array[256] = { 71 {0, 0, 0, 0, /* 0x00 */ 72 {{0, 0}, 73 {0, 0}, 74 {0, 0}, 75 {0, 0} 76 } 77 }, 78 {1, 0, 1, 0, /* 0x01 */ 79 {{0, 0}, 80 {0, 0}, 81 {0, 0}, 82 {0, 0} 83 } 84 }, 85 {0, 0, 1, 0, /* 0x02 */ 86 {{1, 1}, 87 {0, 0}, 88 {0, 0}, 89 {0, 0} 90 } 91 }, 92 {1, 0, 1, 0, /* 0x03 */ 93 {{0, 1}, 94 {0, 0}, 95 {0, 0}, 96 {0, 0} 97 } 98 }, 99 {0, 0, 1, 0, /* 0x04 */ 100 {{2, 2}, 101 {0, 0}, 102 {0, 0}, 103 {0, 0} 104 } 105 }, 106 {1, 0, 2, 0, /* 0x05 */ 107 {{0, 0}, 108 {2, 2}, 109 {0, 0}, 110 {0, 0} 111 } 112 }, 113 {0, 0, 1, 0, /* 0x06 */ 114 {{1, 2}, 115 {0, 0}, 116 {0, 0}, 117 {0, 0} 118 } 119 }, 120 {1, 0, 1, 0, /* 0x07 */ 121 {{0, 2}, 122 {0, 0}, 123 {0, 0}, 124 {0, 0} 125 } 126 }, 127 {0, 0, 1, 0, /* 0x08 */ 128 {{3, 3}, 129 {0, 0}, 130 {0, 0}, 131 {0, 0} 132 } 133 }, 134 {1, 0, 2, 0, /* 0x09 */ 135 {{0, 0}, 136 {3, 3}, 137 {0, 0}, 138 {0, 0} 139 } 140 }, 141 {0, 0, 2, 0, /* 0x0a */ 142 {{1, 1}, 143 {3, 3}, 144 {0, 0}, 145 {0, 0} 146 } 147 }, 148 {1, 0, 2, 0, /* 0x0b */ 149 {{0, 1}, 150 {3, 3}, 151 {0, 0}, 152 {0, 0} 153 } 154 }, 155 {0, 0, 1, 0, /* 0x0c */ 156 {{2, 3}, 157 {0, 0}, 158 {0, 0}, 159 {0, 0} 160 } 161 }, 162 {1, 0, 2, 0, /* 0x0d */ 163 {{0, 0}, 164 {2, 3}, 165 {0, 0}, 166 {0, 0} 167 } 168 }, 169 {0, 0, 1, 0, /* 0x0e */ 170 {{1, 3}, 171 {0, 0}, 172 {0, 0}, 173 {0, 0} 174 } 175 }, 176 {1, 0, 1, 0, /* 0x0f */ 177 {{0, 3}, 178 {0, 0}, 179 {0, 0}, 180 {0, 0} 181 } 182 }, 183 {0, 0, 1, 0, /* 0x10 */ 184 {{4, 4}, 185 {0, 0}, 186 {0, 0}, 187 {0, 0} 188 } 189 }, 190 {1, 0, 2, 0, /* 0x11 */ 191 {{0, 0}, 192 {4, 4}, 193 {0, 0}, 194 {0, 0} 195 } 196 }, 197 {0, 0, 2, 0, /* 0x12 */ 198 {{1, 1}, 199 {4, 4}, 200 {0, 0}, 201 {0, 0} 202 } 203 }, 204 {1, 0, 2, 0, /* 0x13 */ 205 {{0, 1}, 206 {4, 4}, 207 {0, 0}, 208 {0, 0} 209 } 210 }, 211 {0, 0, 2, 0, /* 0x14 */ 212 {{2, 2}, 213 {4, 4}, 214 {0, 0}, 215 {0, 0} 216 } 217 }, 218 {1, 0, 3, 0, /* 0x15 */ 219 {{0, 0}, 220 {2, 2}, 221 {4, 4}, 222 {0, 0} 223 } 224 }, 225 {0, 0, 2, 0, /* 0x16 */ 226 {{1, 2}, 227 {4, 4}, 228 {0, 0}, 229 {0, 0} 230 } 231 }, 232 {1, 0, 2, 0, /* 0x17 */ 233 {{0, 2}, 234 {4, 4}, 235 {0, 0}, 236 {0, 0} 237 } 238 }, 239 {0, 0, 1, 0, /* 0x18 */ 240 {{3, 4}, 241 {0, 0}, 242 {0, 0}, 243 {0, 0} 244 } 245 }, 246 {1, 0, 2, 0, /* 0x19 */ 247 {{0, 0}, 248 {3, 4}, 249 {0, 0}, 250 {0, 0} 251 } 252 }, 253 {0, 0, 2, 0, /* 0x1a */ 254 {{1, 1}, 255 {3, 4}, 256 {0, 0}, 257 {0, 0} 258 } 259 }, 260 {1, 0, 2, 0, /* 0x1b */ 261 {{0, 1}, 262 {3, 4}, 263 {0, 0}, 264 {0, 0} 265 } 266 }, 267 {0, 0, 1, 0, /* 0x1c */ 268 {{2, 4}, 269 {0, 0}, 270 {0, 0}, 271 {0, 0} 272 } 273 }, 274 {1, 0, 2, 0, /* 0x1d */ 275 {{0, 0}, 276 {2, 4}, 277 {0, 0}, 278 {0, 0} 279 } 280 }, 281 {0, 0, 1, 0, /* 0x1e */ 282 {{1, 4}, 283 {0, 0}, 284 {0, 0}, 285 {0, 0} 286 } 287 }, 288 {1, 0, 1, 0, /* 0x1f */ 289 {{0, 4}, 290 {0, 0}, 291 {0, 0}, 292 {0, 0} 293 } 294 }, 295 {0, 0, 1, 0, /* 0x20 */ 296 {{5, 5}, 297 {0, 0}, 298 {0, 0}, 299 {0, 0} 300 } 301 }, 302 {1, 0, 2, 0, /* 0x21 */ 303 {{0, 0}, 304 {5, 5}, 305 {0, 0}, 306 {0, 0} 307 } 308 }, 309 {0, 0, 2, 0, /* 0x22 */ 310 {{1, 1}, 311 {5, 5}, 312 {0, 0}, 313 {0, 0} 314 } 315 }, 316 {1, 0, 2, 0, /* 0x23 */ 317 {{0, 1}, 318 {5, 5}, 319 {0, 0}, 320 {0, 0} 321 } 322 }, 323 {0, 0, 2, 0, /* 0x24 */ 324 {{2, 2}, 325 {5, 5}, 326 {0, 0}, 327 {0, 0} 328 } 329 }, 330 {1, 0, 3, 0, /* 0x25 */ 331 {{0, 0}, 332 {2, 2}, 333 {5, 5}, 334 {0, 0} 335 } 336 }, 337 {0, 0, 2, 0, /* 0x26 */ 338 {{1, 2}, 339 {5, 5}, 340 {0, 0}, 341 {0, 0} 342 } 343 }, 344 {1, 0, 2, 0, /* 0x27 */ 345 {{0, 2}, 346 {5, 5}, 347 {0, 0}, 348 {0, 0} 349 } 350 }, 351 {0, 0, 2, 0, /* 0x28 */ 352 {{3, 3}, 353 {5, 5}, 354 {0, 0}, 355 {0, 0} 356 } 357 }, 358 {1, 0, 3, 0, /* 0x29 */ 359 {{0, 0}, 360 {3, 3}, 361 {5, 5}, 362 {0, 0} 363 } 364 }, 365 {0, 0, 3, 0, /* 0x2a */ 366 {{1, 1}, 367 {3, 3}, 368 {5, 5}, 369 {0, 0} 370 } 371 }, 372 {1, 0, 3, 0, /* 0x2b */ 373 {{0, 1}, 374 {3, 3}, 375 {5, 5}, 376 {0, 0} 377 } 378 }, 379 {0, 0, 2, 0, /* 0x2c */ 380 {{2, 3}, 381 {5, 5}, 382 {0, 0}, 383 {0, 0} 384 } 385 }, 386 {1, 0, 3, 0, /* 0x2d */ 387 {{0, 0}, 388 {2, 3}, 389 {5, 5}, 390 {0, 0} 391 } 392 }, 393 {0, 0, 2, 0, /* 0x2e */ 394 {{1, 3}, 395 {5, 5}, 396 {0, 0}, 397 {0, 0} 398 } 399 }, 400 {1, 0, 2, 0, /* 0x2f */ 401 {{0, 3}, 402 {5, 5}, 403 {0, 0}, 404 {0, 0} 405 } 406 }, 407 {0, 0, 1, 0, /* 0x30 */ 408 {{4, 5}, 409 {0, 0}, 410 {0, 0}, 411 {0, 0} 412 } 413 }, 414 {1, 0, 2, 0, /* 0x31 */ 415 {{0, 0}, 416 {4, 5}, 417 {0, 0}, 418 {0, 0} 419 } 420 }, 421 {0, 0, 2, 0, /* 0x32 */ 422 {{1, 1}, 423 {4, 5}, 424 {0, 0}, 425 {0, 0} 426 } 427 }, 428 {1, 0, 2, 0, /* 0x33 */ 429 {{0, 1}, 430 {4, 5}, 431 {0, 0}, 432 {0, 0} 433 } 434 }, 435 {0, 0, 2, 0, /* 0x34 */ 436 {{2, 2}, 437 {4, 5}, 438 {0, 0}, 439 {0, 0} 440 } 441 }, 442 {1, 0, 3, 0, /* 0x35 */ 443 {{0, 0}, 444 {2, 2}, 445 {4, 5}, 446 {0, 0} 447 } 448 }, 449 {0, 0, 2, 0, /* 0x36 */ 450 {{1, 2}, 451 {4, 5}, 452 {0, 0}, 453 {0, 0} 454 } 455 }, 456 {1, 0, 2, 0, /* 0x37 */ 457 {{0, 2}, 458 {4, 5}, 459 {0, 0}, 460 {0, 0} 461 } 462 }, 463 {0, 0, 1, 0, /* 0x38 */ 464 {{3, 5}, 465 {0, 0}, 466 {0, 0}, 467 {0, 0} 468 } 469 }, 470 {1, 0, 2, 0, /* 0x39 */ 471 {{0, 0}, 472 {3, 5}, 473 {0, 0}, 474 {0, 0} 475 } 476 }, 477 {0, 0, 2, 0, /* 0x3a */ 478 {{1, 1}, 479 {3, 5}, 480 {0, 0}, 481 {0, 0} 482 } 483 }, 484 {1, 0, 2, 0, /* 0x3b */ 485 {{0, 1}, 486 {3, 5}, 487 {0, 0}, 488 {0, 0} 489 } 490 }, 491 {0, 0, 1, 0, /* 0x3c */ 492 {{2, 5}, 493 {0, 0}, 494 {0, 0}, 495 {0, 0} 496 } 497 }, 498 {1, 0, 2, 0, /* 0x3d */ 499 {{0, 0}, 500 {2, 5}, 501 {0, 0}, 502 {0, 0} 503 } 504 }, 505 {0, 0, 1, 0, /* 0x3e */ 506 {{1, 5}, 507 {0, 0}, 508 {0, 0}, 509 {0, 0} 510 } 511 }, 512 {1, 0, 1, 0, /* 0x3f */ 513 {{0, 5}, 514 {0, 0}, 515 {0, 0}, 516 {0, 0} 517 } 518 }, 519 {0, 0, 1, 0, /* 0x40 */ 520 {{6, 6}, 521 {0, 0}, 522 {0, 0}, 523 {0, 0} 524 } 525 }, 526 {1, 0, 2, 0, /* 0x41 */ 527 {{0, 0}, 528 {6, 6}, 529 {0, 0}, 530 {0, 0} 531 } 532 }, 533 {0, 0, 2, 0, /* 0x42 */ 534 {{1, 1}, 535 {6, 6}, 536 {0, 0}, 537 {0, 0} 538 } 539 }, 540 {1, 0, 2, 0, /* 0x43 */ 541 {{0, 1}, 542 {6, 6}, 543 {0, 0}, 544 {0, 0} 545 } 546 }, 547 {0, 0, 2, 0, /* 0x44 */ 548 {{2, 2}, 549 {6, 6}, 550 {0, 0}, 551 {0, 0} 552 } 553 }, 554 {1, 0, 3, 0, /* 0x45 */ 555 {{0, 0}, 556 {2, 2}, 557 {6, 6}, 558 {0, 0} 559 } 560 }, 561 {0, 0, 2, 0, /* 0x46 */ 562 {{1, 2}, 563 {6, 6}, 564 {0, 0}, 565 {0, 0} 566 } 567 }, 568 {1, 0, 2, 0, /* 0x47 */ 569 {{0, 2}, 570 {6, 6}, 571 {0, 0}, 572 {0, 0} 573 } 574 }, 575 {0, 0, 2, 0, /* 0x48 */ 576 {{3, 3}, 577 {6, 6}, 578 {0, 0}, 579 {0, 0} 580 } 581 }, 582 {1, 0, 3, 0, /* 0x49 */ 583 {{0, 0}, 584 {3, 3}, 585 {6, 6}, 586 {0, 0} 587 } 588 }, 589 {0, 0, 3, 0, /* 0x4a */ 590 {{1, 1}, 591 {3, 3}, 592 {6, 6}, 593 {0, 0} 594 } 595 }, 596 {1, 0, 3, 0, /* 0x4b */ 597 {{0, 1}, 598 {3, 3}, 599 {6, 6}, 600 {0, 0} 601 } 602 }, 603 {0, 0, 2, 0, /* 0x4c */ 604 {{2, 3}, 605 {6, 6}, 606 {0, 0}, 607 {0, 0} 608 } 609 }, 610 {1, 0, 3, 0, /* 0x4d */ 611 {{0, 0}, 612 {2, 3}, 613 {6, 6}, 614 {0, 0} 615 } 616 }, 617 {0, 0, 2, 0, /* 0x4e */ 618 {{1, 3}, 619 {6, 6}, 620 {0, 0}, 621 {0, 0} 622 } 623 }, 624 {1, 0, 2, 0, /* 0x4f */ 625 {{0, 3}, 626 {6, 6}, 627 {0, 0}, 628 {0, 0} 629 } 630 }, 631 {0, 0, 2, 0, /* 0x50 */ 632 {{4, 4}, 633 {6, 6}, 634 {0, 0}, 635 {0, 0} 636 } 637 }, 638 {1, 0, 3, 0, /* 0x51 */ 639 {{0, 0}, 640 {4, 4}, 641 {6, 6}, 642 {0, 0} 643 } 644 }, 645 {0, 0, 3, 0, /* 0x52 */ 646 {{1, 1}, 647 {4, 4}, 648 {6, 6}, 649 {0, 0} 650 } 651 }, 652 {1, 0, 3, 0, /* 0x53 */ 653 {{0, 1}, 654 {4, 4}, 655 {6, 6}, 656 {0, 0} 657 } 658 }, 659 {0, 0, 3, 0, /* 0x54 */ 660 {{2, 2}, 661 {4, 4}, 662 {6, 6}, 663 {0, 0} 664 } 665 }, 666 {1, 0, 4, 0, /* 0x55 */ 667 {{0, 0}, 668 {2, 2}, 669 {4, 4}, 670 {6, 6} 671 } 672 }, 673 {0, 0, 3, 0, /* 0x56 */ 674 {{1, 2}, 675 {4, 4}, 676 {6, 6}, 677 {0, 0} 678 } 679 }, 680 {1, 0, 3, 0, /* 0x57 */ 681 {{0, 2}, 682 {4, 4}, 683 {6, 6}, 684 {0, 0} 685 } 686 }, 687 {0, 0, 2, 0, /* 0x58 */ 688 {{3, 4}, 689 {6, 6}, 690 {0, 0}, 691 {0, 0} 692 } 693 }, 694 {1, 0, 3, 0, /* 0x59 */ 695 {{0, 0}, 696 {3, 4}, 697 {6, 6}, 698 {0, 0} 699 } 700 }, 701 {0, 0, 3, 0, /* 0x5a */ 702 {{1, 1}, 703 {3, 4}, 704 {6, 6}, 705 {0, 0} 706 } 707 }, 708 {1, 0, 3, 0, /* 0x5b */ 709 {{0, 1}, 710 {3, 4}, 711 {6, 6}, 712 {0, 0} 713 } 714 }, 715 {0, 0, 2, 0, /* 0x5c */ 716 {{2, 4}, 717 {6, 6}, 718 {0, 0}, 719 {0, 0} 720 } 721 }, 722 {1, 0, 3, 0, /* 0x5d */ 723 {{0, 0}, 724 {2, 4}, 725 {6, 6}, 726 {0, 0} 727 } 728 }, 729 {0, 0, 2, 0, /* 0x5e */ 730 {{1, 4}, 731 {6, 6}, 732 {0, 0}, 733 {0, 0} 734 } 735 }, 736 {1, 0, 2, 0, /* 0x5f */ 737 {{0, 4}, 738 {6, 6}, 739 {0, 0}, 740 {0, 0} 741 } 742 }, 743 {0, 0, 1, 0, /* 0x60 */ 744 {{5, 6}, 745 {0, 0}, 746 {0, 0}, 747 {0, 0} 748 } 749 }, 750 {1, 0, 2, 0, /* 0x61 */ 751 {{0, 0}, 752 {5, 6}, 753 {0, 0}, 754 {0, 0} 755 } 756 }, 757 {0, 0, 2, 0, /* 0x62 */ 758 {{1, 1}, 759 {5, 6}, 760 {0, 0}, 761 {0, 0} 762 } 763 }, 764 {1, 0, 2, 0, /* 0x63 */ 765 {{0, 1}, 766 {5, 6}, 767 {0, 0}, 768 {0, 0} 769 } 770 }, 771 {0, 0, 2, 0, /* 0x64 */ 772 {{2, 2}, 773 {5, 6}, 774 {0, 0}, 775 {0, 0} 776 } 777 }, 778 {1, 0, 3, 0, /* 0x65 */ 779 {{0, 0}, 780 {2, 2}, 781 {5, 6}, 782 {0, 0} 783 } 784 }, 785 {0, 0, 2, 0, /* 0x66 */ 786 {{1, 2}, 787 {5, 6}, 788 {0, 0}, 789 {0, 0} 790 } 791 }, 792 {1, 0, 2, 0, /* 0x67 */ 793 {{0, 2}, 794 {5, 6}, 795 {0, 0}, 796 {0, 0} 797 } 798 }, 799 {0, 0, 2, 0, /* 0x68 */ 800 {{3, 3}, 801 {5, 6}, 802 {0, 0}, 803 {0, 0} 804 } 805 }, 806 {1, 0, 3, 0, /* 0x69 */ 807 {{0, 0}, 808 {3, 3}, 809 {5, 6}, 810 {0, 0} 811 } 812 }, 813 {0, 0, 3, 0, /* 0x6a */ 814 {{1, 1}, 815 {3, 3}, 816 {5, 6}, 817 {0, 0} 818 } 819 }, 820 {1, 0, 3, 0, /* 0x6b */ 821 {{0, 1}, 822 {3, 3}, 823 {5, 6}, 824 {0, 0} 825 } 826 }, 827 {0, 0, 2, 0, /* 0x6c */ 828 {{2, 3}, 829 {5, 6}, 830 {0, 0}, 831 {0, 0} 832 } 833 }, 834 {1, 0, 3, 0, /* 0x6d */ 835 {{0, 0}, 836 {2, 3}, 837 {5, 6}, 838 {0, 0} 839 } 840 }, 841 {0, 0, 2, 0, /* 0x6e */ 842 {{1, 3}, 843 {5, 6}, 844 {0, 0}, 845 {0, 0} 846 } 847 }, 848 {1, 0, 2, 0, /* 0x6f */ 849 {{0, 3}, 850 {5, 6}, 851 {0, 0}, 852 {0, 0} 853 } 854 }, 855 {0, 0, 1, 0, /* 0x70 */ 856 {{4, 6}, 857 {0, 0}, 858 {0, 0}, 859 {0, 0} 860 } 861 }, 862 {1, 0, 2, 0, /* 0x71 */ 863 {{0, 0}, 864 {4, 6}, 865 {0, 0}, 866 {0, 0} 867 } 868 }, 869 {0, 0, 2, 0, /* 0x72 */ 870 {{1, 1}, 871 {4, 6}, 872 {0, 0}, 873 {0, 0} 874 } 875 }, 876 {1, 0, 2, 0, /* 0x73 */ 877 {{0, 1}, 878 {4, 6}, 879 {0, 0}, 880 {0, 0} 881 } 882 }, 883 {0, 0, 2, 0, /* 0x74 */ 884 {{2, 2}, 885 {4, 6}, 886 {0, 0}, 887 {0, 0} 888 } 889 }, 890 {1, 0, 3, 0, /* 0x75 */ 891 {{0, 0}, 892 {2, 2}, 893 {4, 6}, 894 {0, 0} 895 } 896 }, 897 {0, 0, 2, 0, /* 0x76 */ 898 {{1, 2}, 899 {4, 6}, 900 {0, 0}, 901 {0, 0} 902 } 903 }, 904 {1, 0, 2, 0, /* 0x77 */ 905 {{0, 2}, 906 {4, 6}, 907 {0, 0}, 908 {0, 0} 909 } 910 }, 911 {0, 0, 1, 0, /* 0x78 */ 912 {{3, 6}, 913 {0, 0}, 914 {0, 0}, 915 {0, 0} 916 } 917 }, 918 {1, 0, 2, 0, /* 0x79 */ 919 {{0, 0}, 920 {3, 6}, 921 {0, 0}, 922 {0, 0} 923 } 924 }, 925 {0, 0, 2, 0, /* 0x7a */ 926 {{1, 1}, 927 {3, 6}, 928 {0, 0}, 929 {0, 0} 930 } 931 }, 932 {1, 0, 2, 0, /* 0x7b */ 933 {{0, 1}, 934 {3, 6}, 935 {0, 0}, 936 {0, 0} 937 } 938 }, 939 {0, 0, 1, 0, /* 0x7c */ 940 {{2, 6}, 941 {0, 0}, 942 {0, 0}, 943 {0, 0} 944 } 945 }, 946 {1, 0, 2, 0, /* 0x7d */ 947 {{0, 0}, 948 {2, 6}, 949 {0, 0}, 950 {0, 0} 951 } 952 }, 953 {0, 0, 1, 0, /* 0x7e */ 954 {{1, 6}, 955 {0, 0}, 956 {0, 0}, 957 {0, 0} 958 } 959 }, 960 {1, 0, 1, 0, /* 0x7f */ 961 {{0, 6}, 962 {0, 0}, 963 {0, 0}, 964 {0, 0} 965 } 966 }, 967 {0, 1, 1, 0, /* 0x80 */ 968 {{7, 7}, 969 {0, 0}, 970 {0, 0}, 971 {0, 0} 972 } 973 }, 974 {1, 1, 2, 0, /* 0x81 */ 975 {{0, 0}, 976 {7, 7}, 977 {0, 0}, 978 {0, 0} 979 } 980 }, 981 {0, 1, 2, 0, /* 0x82 */ 982 {{1, 1}, 983 {7, 7}, 984 {0, 0}, 985 {0, 0} 986 } 987 }, 988 {1, 1, 2, 0, /* 0x83 */ 989 {{0, 1}, 990 {7, 7}, 991 {0, 0}, 992 {0, 0} 993 } 994 }, 995 {0, 1, 2, 0, /* 0x84 */ 996 {{2, 2}, 997 {7, 7}, 998 {0, 0}, 999 {0, 0} 1000 } 1001 }, 1002 {1, 1, 3, 0, /* 0x85 */ 1003 {{0, 0}, 1004 {2, 2}, 1005 {7, 7}, 1006 {0, 0} 1007 } 1008 }, 1009 {0, 1, 2, 0, /* 0x86 */ 1010 {{1, 2}, 1011 {7, 7}, 1012 {0, 0}, 1013 {0, 0} 1014 } 1015 }, 1016 {1, 1, 2, 0, /* 0x87 */ 1017 {{0, 2}, 1018 {7, 7}, 1019 {0, 0}, 1020 {0, 0} 1021 } 1022 }, 1023 {0, 1, 2, 0, /* 0x88 */ 1024 {{3, 3}, 1025 {7, 7}, 1026 {0, 0}, 1027 {0, 0} 1028 } 1029 }, 1030 {1, 1, 3, 0, /* 0x89 */ 1031 {{0, 0}, 1032 {3, 3}, 1033 {7, 7}, 1034 {0, 0} 1035 } 1036 }, 1037 {0, 1, 3, 0, /* 0x8a */ 1038 {{1, 1}, 1039 {3, 3}, 1040 {7, 7}, 1041 {0, 0} 1042 } 1043 }, 1044 {1, 1, 3, 0, /* 0x8b */ 1045 {{0, 1}, 1046 {3, 3}, 1047 {7, 7}, 1048 {0, 0} 1049 } 1050 }, 1051 {0, 1, 2, 0, /* 0x8c */ 1052 {{2, 3}, 1053 {7, 7}, 1054 {0, 0}, 1055 {0, 0} 1056 } 1057 }, 1058 {1, 1, 3, 0, /* 0x8d */ 1059 {{0, 0}, 1060 {2, 3}, 1061 {7, 7}, 1062 {0, 0} 1063 } 1064 }, 1065 {0, 1, 2, 0, /* 0x8e */ 1066 {{1, 3}, 1067 {7, 7}, 1068 {0, 0}, 1069 {0, 0} 1070 } 1071 }, 1072 {1, 1, 2, 0, /* 0x8f */ 1073 {{0, 3}, 1074 {7, 7}, 1075 {0, 0}, 1076 {0, 0} 1077 } 1078 }, 1079 {0, 1, 2, 0, /* 0x90 */ 1080 {{4, 4}, 1081 {7, 7}, 1082 {0, 0}, 1083 {0, 0} 1084 } 1085 }, 1086 {1, 1, 3, 0, /* 0x91 */ 1087 {{0, 0}, 1088 {4, 4}, 1089 {7, 7}, 1090 {0, 0} 1091 } 1092 }, 1093 {0, 1, 3, 0, /* 0x92 */ 1094 {{1, 1}, 1095 {4, 4}, 1096 {7, 7}, 1097 {0, 0} 1098 } 1099 }, 1100 {1, 1, 3, 0, /* 0x93 */ 1101 {{0, 1}, 1102 {4, 4}, 1103 {7, 7}, 1104 {0, 0} 1105 } 1106 }, 1107 {0, 1, 3, 0, /* 0x94 */ 1108 {{2, 2}, 1109 {4, 4}, 1110 {7, 7}, 1111 {0, 0} 1112 } 1113 }, 1114 {1, 1, 4, 0, /* 0x95 */ 1115 {{0, 0}, 1116 {2, 2}, 1117 {4, 4}, 1118 {7, 7} 1119 } 1120 }, 1121 {0, 1, 3, 0, /* 0x96 */ 1122 {{1, 2}, 1123 {4, 4}, 1124 {7, 7}, 1125 {0, 0} 1126 } 1127 }, 1128 {1, 1, 3, 0, /* 0x97 */ 1129 {{0, 2}, 1130 {4, 4}, 1131 {7, 7}, 1132 {0, 0} 1133 } 1134 }, 1135 {0, 1, 2, 0, /* 0x98 */ 1136 {{3, 4}, 1137 {7, 7}, 1138 {0, 0}, 1139 {0, 0} 1140 } 1141 }, 1142 {1, 1, 3, 0, /* 0x99 */ 1143 {{0, 0}, 1144 {3, 4}, 1145 {7, 7}, 1146 {0, 0} 1147 } 1148 }, 1149 {0, 1, 3, 0, /* 0x9a */ 1150 {{1, 1}, 1151 {3, 4}, 1152 {7, 7}, 1153 {0, 0} 1154 } 1155 }, 1156 {1, 1, 3, 0, /* 0x9b */ 1157 {{0, 1}, 1158 {3, 4}, 1159 {7, 7}, 1160 {0, 0} 1161 } 1162 }, 1163 {0, 1, 2, 0, /* 0x9c */ 1164 {{2, 4}, 1165 {7, 7}, 1166 {0, 0}, 1167 {0, 0} 1168 } 1169 }, 1170 {1, 1, 3, 0, /* 0x9d */ 1171 {{0, 0}, 1172 {2, 4}, 1173 {7, 7}, 1174 {0, 0} 1175 } 1176 }, 1177 {0, 1, 2, 0, /* 0x9e */ 1178 {{1, 4}, 1179 {7, 7}, 1180 {0, 0}, 1181 {0, 0} 1182 } 1183 }, 1184 {1, 1, 2, 0, /* 0x9f */ 1185 {{0, 4}, 1186 {7, 7}, 1187 {0, 0}, 1188 {0, 0} 1189 } 1190 }, 1191 {0, 1, 2, 0, /* 0xa0 */ 1192 {{5, 5}, 1193 {7, 7}, 1194 {0, 0}, 1195 {0, 0} 1196 } 1197 }, 1198 {1, 1, 3, 0, /* 0xa1 */ 1199 {{0, 0}, 1200 {5, 5}, 1201 {7, 7}, 1202 {0, 0} 1203 } 1204 }, 1205 {0, 1, 3, 0, /* 0xa2 */ 1206 {{1, 1}, 1207 {5, 5}, 1208 {7, 7}, 1209 {0, 0} 1210 } 1211 }, 1212 {1, 1, 3, 0, /* 0xa3 */ 1213 {{0, 1}, 1214 {5, 5}, 1215 {7, 7}, 1216 {0, 0} 1217 } 1218 }, 1219 {0, 1, 3, 0, /* 0xa4 */ 1220 {{2, 2}, 1221 {5, 5}, 1222 {7, 7}, 1223 {0, 0} 1224 } 1225 }, 1226 {1, 1, 4, 0, /* 0xa5 */ 1227 {{0, 0}, 1228 {2, 2}, 1229 {5, 5}, 1230 {7, 7} 1231 } 1232 }, 1233 {0, 1, 3, 0, /* 0xa6 */ 1234 {{1, 2}, 1235 {5, 5}, 1236 {7, 7}, 1237 {0, 0} 1238 } 1239 }, 1240 {1, 1, 3, 0, /* 0xa7 */ 1241 {{0, 2}, 1242 {5, 5}, 1243 {7, 7}, 1244 {0, 0} 1245 } 1246 }, 1247 {0, 1, 3, 0, /* 0xa8 */ 1248 {{3, 3}, 1249 {5, 5}, 1250 {7, 7}, 1251 {0, 0} 1252 } 1253 }, 1254 {1, 1, 4, 0, /* 0xa9 */ 1255 {{0, 0}, 1256 {3, 3}, 1257 {5, 5}, 1258 {7, 7} 1259 } 1260 }, 1261 {0, 1, 4, 0, /* 0xaa */ 1262 {{1, 1}, 1263 {3, 3}, 1264 {5, 5}, 1265 {7, 7} 1266 } 1267 }, 1268 {1, 1, 4, 0, /* 0xab */ 1269 {{0, 1}, 1270 {3, 3}, 1271 {5, 5}, 1272 {7, 7} 1273 } 1274 }, 1275 {0, 1, 3, 0, /* 0xac */ 1276 {{2, 3}, 1277 {5, 5}, 1278 {7, 7}, 1279 {0, 0} 1280 } 1281 }, 1282 {1, 1, 4, 0, /* 0xad */ 1283 {{0, 0}, 1284 {2, 3}, 1285 {5, 5}, 1286 {7, 7} 1287 } 1288 }, 1289 {0, 1, 3, 0, /* 0xae */ 1290 {{1, 3}, 1291 {5, 5}, 1292 {7, 7}, 1293 {0, 0} 1294 } 1295 }, 1296 {1, 1, 3, 0, /* 0xaf */ 1297 {{0, 3}, 1298 {5, 5}, 1299 {7, 7}, 1300 {0, 0} 1301 } 1302 }, 1303 {0, 1, 2, 0, /* 0xb0 */ 1304 {{4, 5}, 1305 {7, 7}, 1306 {0, 0}, 1307 {0, 0} 1308 } 1309 }, 1310 {1, 1, 3, 0, /* 0xb1 */ 1311 {{0, 0}, 1312 {4, 5}, 1313 {7, 7}, 1314 {0, 0} 1315 } 1316 }, 1317 {0, 1, 3, 0, /* 0xb2 */ 1318 {{1, 1}, 1319 {4, 5}, 1320 {7, 7}, 1321 {0, 0} 1322 } 1323 }, 1324 {1, 1, 3, 0, /* 0xb3 */ 1325 {{0, 1}, 1326 {4, 5}, 1327 {7, 7}, 1328 {0, 0} 1329 } 1330 }, 1331 {0, 1, 3, 0, /* 0xb4 */ 1332 {{2, 2}, 1333 {4, 5}, 1334 {7, 7}, 1335 {0, 0} 1336 } 1337 }, 1338 {1, 1, 4, 0, /* 0xb5 */ 1339 {{0, 0}, 1340 {2, 2}, 1341 {4, 5}, 1342 {7, 7} 1343 } 1344 }, 1345 {0, 1, 3, 0, /* 0xb6 */ 1346 {{1, 2}, 1347 {4, 5}, 1348 {7, 7}, 1349 {0, 0} 1350 } 1351 }, 1352 {1, 1, 3, 0, /* 0xb7 */ 1353 {{0, 2}, 1354 {4, 5}, 1355 {7, 7}, 1356 {0, 0} 1357 } 1358 }, 1359 {0, 1, 2, 0, /* 0xb8 */ 1360 {{3, 5}, 1361 {7, 7}, 1362 {0, 0}, 1363 {0, 0} 1364 } 1365 }, 1366 {1, 1, 3, 0, /* 0xb9 */ 1367 {{0, 0}, 1368 {3, 5}, 1369 {7, 7}, 1370 {0, 0} 1371 } 1372 }, 1373 {0, 1, 3, 0, /* 0xba */ 1374 {{1, 1}, 1375 {3, 5}, 1376 {7, 7}, 1377 {0, 0} 1378 } 1379 }, 1380 {1, 1, 3, 0, /* 0xbb */ 1381 {{0, 1}, 1382 {3, 5}, 1383 {7, 7}, 1384 {0, 0} 1385 } 1386 }, 1387 {0, 1, 2, 0, /* 0xbc */ 1388 {{2, 5}, 1389 {7, 7}, 1390 {0, 0}, 1391 {0, 0} 1392 } 1393 }, 1394 {1, 1, 3, 0, /* 0xbd */ 1395 {{0, 0}, 1396 {2, 5}, 1397 {7, 7}, 1398 {0, 0} 1399 } 1400 }, 1401 {0, 1, 2, 0, /* 0xbe */ 1402 {{1, 5}, 1403 {7, 7}, 1404 {0, 0}, 1405 {0, 0} 1406 } 1407 }, 1408 {1, 1, 2, 0, /* 0xbf */ 1409 {{0, 5}, 1410 {7, 7}, 1411 {0, 0}, 1412 {0, 0} 1413 } 1414 }, 1415 {0, 1, 1, 0, /* 0xc0 */ 1416 {{6, 7}, 1417 {0, 0}, 1418 {0, 0}, 1419 {0, 0} 1420 } 1421 }, 1422 {1, 1, 2, 0, /* 0xc1 */ 1423 {{0, 0}, 1424 {6, 7}, 1425 {0, 0}, 1426 {0, 0} 1427 } 1428 }, 1429 {0, 1, 2, 0, /* 0xc2 */ 1430 {{1, 1}, 1431 {6, 7}, 1432 {0, 0}, 1433 {0, 0} 1434 } 1435 }, 1436 {1, 1, 2, 0, /* 0xc3 */ 1437 {{0, 1}, 1438 {6, 7}, 1439 {0, 0}, 1440 {0, 0} 1441 } 1442 }, 1443 {0, 1, 2, 0, /* 0xc4 */ 1444 {{2, 2}, 1445 {6, 7}, 1446 {0, 0}, 1447 {0, 0} 1448 } 1449 }, 1450 {1, 1, 3, 0, /* 0xc5 */ 1451 {{0, 0}, 1452 {2, 2}, 1453 {6, 7}, 1454 {0, 0} 1455 } 1456 }, 1457 {0, 1, 2, 0, /* 0xc6 */ 1458 {{1, 2}, 1459 {6, 7}, 1460 {0, 0}, 1461 {0, 0} 1462 } 1463 }, 1464 {1, 1, 2, 0, /* 0xc7 */ 1465 {{0, 2}, 1466 {6, 7}, 1467 {0, 0}, 1468 {0, 0} 1469 } 1470 }, 1471 {0, 1, 2, 0, /* 0xc8 */ 1472 {{3, 3}, 1473 {6, 7}, 1474 {0, 0}, 1475 {0, 0} 1476 } 1477 }, 1478 {1, 1, 3, 0, /* 0xc9 */ 1479 {{0, 0}, 1480 {3, 3}, 1481 {6, 7}, 1482 {0, 0} 1483 } 1484 }, 1485 {0, 1, 3, 0, /* 0xca */ 1486 {{1, 1}, 1487 {3, 3}, 1488 {6, 7}, 1489 {0, 0} 1490 } 1491 }, 1492 {1, 1, 3, 0, /* 0xcb */ 1493 {{0, 1}, 1494 {3, 3}, 1495 {6, 7}, 1496 {0, 0} 1497 } 1498 }, 1499 {0, 1, 2, 0, /* 0xcc */ 1500 {{2, 3}, 1501 {6, 7}, 1502 {0, 0}, 1503 {0, 0} 1504 } 1505 }, 1506 {1, 1, 3, 0, /* 0xcd */ 1507 {{0, 0}, 1508 {2, 3}, 1509 {6, 7}, 1510 {0, 0} 1511 } 1512 }, 1513 {0, 1, 2, 0, /* 0xce */ 1514 {{1, 3}, 1515 {6, 7}, 1516 {0, 0}, 1517 {0, 0} 1518 } 1519 }, 1520 {1, 1, 2, 0, /* 0xcf */ 1521 {{0, 3}, 1522 {6, 7}, 1523 {0, 0}, 1524 {0, 0} 1525 } 1526 }, 1527 {0, 1, 2, 0, /* 0xd0 */ 1528 {{4, 4}, 1529 {6, 7}, 1530 {0, 0}, 1531 {0, 0} 1532 } 1533 }, 1534 {1, 1, 3, 0, /* 0xd1 */ 1535 {{0, 0}, 1536 {4, 4}, 1537 {6, 7}, 1538 {0, 0} 1539 } 1540 }, 1541 {0, 1, 3, 0, /* 0xd2 */ 1542 {{1, 1}, 1543 {4, 4}, 1544 {6, 7}, 1545 {0, 0} 1546 } 1547 }, 1548 {1, 1, 3, 0, /* 0xd3 */ 1549 {{0, 1}, 1550 {4, 4}, 1551 {6, 7}, 1552 {0, 0} 1553 } 1554 }, 1555 {0, 1, 3, 0, /* 0xd4 */ 1556 {{2, 2}, 1557 {4, 4}, 1558 {6, 7}, 1559 {0, 0} 1560 } 1561 }, 1562 {1, 1, 4, 0, /* 0xd5 */ 1563 {{0, 0}, 1564 {2, 2}, 1565 {4, 4}, 1566 {6, 7} 1567 } 1568 }, 1569 {0, 1, 3, 0, /* 0xd6 */ 1570 {{1, 2}, 1571 {4, 4}, 1572 {6, 7}, 1573 {0, 0} 1574 } 1575 }, 1576 {1, 1, 3, 0, /* 0xd7 */ 1577 {{0, 2}, 1578 {4, 4}, 1579 {6, 7}, 1580 {0, 0} 1581 } 1582 }, 1583 {0, 1, 2, 0, /* 0xd8 */ 1584 {{3, 4}, 1585 {6, 7}, 1586 {0, 0}, 1587 {0, 0} 1588 } 1589 }, 1590 {1, 1, 3, 0, /* 0xd9 */ 1591 {{0, 0}, 1592 {3, 4}, 1593 {6, 7}, 1594 {0, 0} 1595 } 1596 }, 1597 {0, 1, 3, 0, /* 0xda */ 1598 {{1, 1}, 1599 {3, 4}, 1600 {6, 7}, 1601 {0, 0} 1602 } 1603 }, 1604 {1, 1, 3, 0, /* 0xdb */ 1605 {{0, 1}, 1606 {3, 4}, 1607 {6, 7}, 1608 {0, 0} 1609 } 1610 }, 1611 {0, 1, 2, 0, /* 0xdc */ 1612 {{2, 4}, 1613 {6, 7}, 1614 {0, 0}, 1615 {0, 0} 1616 } 1617 }, 1618 {1, 1, 3, 0, /* 0xdd */ 1619 {{0, 0}, 1620 {2, 4}, 1621 {6, 7}, 1622 {0, 0} 1623 } 1624 }, 1625 {0, 1, 2, 0, /* 0xde */ 1626 {{1, 4}, 1627 {6, 7}, 1628 {0, 0}, 1629 {0, 0} 1630 } 1631 }, 1632 {1, 1, 2, 0, /* 0xdf */ 1633 {{0, 4}, 1634 {6, 7}, 1635 {0, 0}, 1636 {0, 0} 1637 } 1638 }, 1639 {0, 1, 1, 0, /* 0xe0 */ 1640 {{5, 7}, 1641 {0, 0}, 1642 {0, 0}, 1643 {0, 0} 1644 } 1645 }, 1646 {1, 1, 2, 0, /* 0xe1 */ 1647 {{0, 0}, 1648 {5, 7}, 1649 {0, 0}, 1650 {0, 0} 1651 } 1652 }, 1653 {0, 1, 2, 0, /* 0xe2 */ 1654 {{1, 1}, 1655 {5, 7}, 1656 {0, 0}, 1657 {0, 0} 1658 } 1659 }, 1660 {1, 1, 2, 0, /* 0xe3 */ 1661 {{0, 1}, 1662 {5, 7}, 1663 {0, 0}, 1664 {0, 0} 1665 } 1666 }, 1667 {0, 1, 2, 0, /* 0xe4 */ 1668 {{2, 2}, 1669 {5, 7}, 1670 {0, 0}, 1671 {0, 0} 1672 } 1673 }, 1674 {1, 1, 3, 0, /* 0xe5 */ 1675 {{0, 0}, 1676 {2, 2}, 1677 {5, 7}, 1678 {0, 0} 1679 } 1680 }, 1681 {0, 1, 2, 0, /* 0xe6 */ 1682 {{1, 2}, 1683 {5, 7}, 1684 {0, 0}, 1685 {0, 0} 1686 } 1687 }, 1688 {1, 1, 2, 0, /* 0xe7 */ 1689 {{0, 2}, 1690 {5, 7}, 1691 {0, 0}, 1692 {0, 0} 1693 } 1694 }, 1695 {0, 1, 2, 0, /* 0xe8 */ 1696 {{3, 3}, 1697 {5, 7}, 1698 {0, 0}, 1699 {0, 0} 1700 } 1701 }, 1702 {1, 1, 3, 0, /* 0xe9 */ 1703 {{0, 0}, 1704 {3, 3}, 1705 {5, 7}, 1706 {0, 0} 1707 } 1708 }, 1709 {0, 1, 3, 0, /* 0xea */ 1710 {{1, 1}, 1711 {3, 3}, 1712 {5, 7}, 1713 {0, 0} 1714 } 1715 }, 1716 {1, 1, 3, 0, /* 0xeb */ 1717 {{0, 1}, 1718 {3, 3}, 1719 {5, 7}, 1720 {0, 0} 1721 } 1722 }, 1723 {0, 1, 2, 0, /* 0xec */ 1724 {{2, 3}, 1725 {5, 7}, 1726 {0, 0}, 1727 {0, 0} 1728 } 1729 }, 1730 {1, 1, 3, 0, /* 0xed */ 1731 {{0, 0}, 1732 {2, 3}, 1733 {5, 7}, 1734 {0, 0} 1735 } 1736 }, 1737 {0, 1, 2, 0, /* 0xee */ 1738 {{1, 3}, 1739 {5, 7}, 1740 {0, 0}, 1741 {0, 0} 1742 } 1743 }, 1744 {1, 1, 2, 0, /* 0xef */ 1745 {{0, 3}, 1746 {5, 7}, 1747 {0, 0}, 1748 {0, 0} 1749 } 1750 }, 1751 {0, 1, 1, 0, /* 0xf0 */ 1752 {{4, 7}, 1753 {0, 0}, 1754 {0, 0}, 1755 {0, 0} 1756 } 1757 }, 1758 {1, 1, 2, 0, /* 0xf1 */ 1759 {{0, 0}, 1760 {4, 7}, 1761 {0, 0}, 1762 {0, 0} 1763 } 1764 }, 1765 {0, 1, 2, 0, /* 0xf2 */ 1766 {{1, 1}, 1767 {4, 7}, 1768 {0, 0}, 1769 {0, 0} 1770 } 1771 }, 1772 {1, 1, 2, 0, /* 0xf3 */ 1773 {{0, 1}, 1774 {4, 7}, 1775 {0, 0}, 1776 {0, 0} 1777 } 1778 }, 1779 {0, 1, 2, 0, /* 0xf4 */ 1780 {{2, 2}, 1781 {4, 7}, 1782 {0, 0}, 1783 {0, 0} 1784 } 1785 }, 1786 {1, 1, 3, 0, /* 0xf5 */ 1787 {{0, 0}, 1788 {2, 2}, 1789 {4, 7}, 1790 {0, 0} 1791 } 1792 }, 1793 {0, 1, 2, 0, /* 0xf6 */ 1794 {{1, 2}, 1795 {4, 7}, 1796 {0, 0}, 1797 {0, 0} 1798 } 1799 }, 1800 {1, 1, 2, 0, /* 0xf7 */ 1801 {{0, 2}, 1802 {4, 7}, 1803 {0, 0}, 1804 {0, 0} 1805 } 1806 }, 1807 {0, 1, 1, 0, /* 0xf8 */ 1808 {{3, 7}, 1809 {0, 0}, 1810 {0, 0}, 1811 {0, 0} 1812 } 1813 }, 1814 {1, 1, 2, 0, /* 0xf9 */ 1815 {{0, 0}, 1816 {3, 7}, 1817 {0, 0}, 1818 {0, 0} 1819 } 1820 }, 1821 {0, 1, 2, 0, /* 0xfa */ 1822 {{1, 1}, 1823 {3, 7}, 1824 {0, 0}, 1825 {0, 0} 1826 } 1827 }, 1828 {1, 1, 2, 0, /* 0xfb */ 1829 {{0, 1}, 1830 {3, 7}, 1831 {0, 0}, 1832 {0, 0} 1833 } 1834 }, 1835 {0, 1, 1, 0, /* 0xfc */ 1836 {{2, 7}, 1837 {0, 0}, 1838 {0, 0}, 1839 {0, 0} 1840 } 1841 }, 1842 {1, 1, 2, 0, /* 0xfd */ 1843 {{0, 0}, 1844 {2, 7}, 1845 {0, 0}, 1846 {0, 0} 1847 } 1848 }, 1849 {0, 1, 1, 0, /* 0xfe */ 1850 {{1, 7}, 1851 {0, 0}, 1852 {0, 0}, 1853 {0, 0} 1854 } 1855 }, 1856 {1, 1, 1, 0, /* 0xff */ 1857 {{0, 7}, 1858 {0, 0}, 1859 {0, 0}, 1860 {0, 0} 1861 } 1862 } 1863 }; 1864 1865 1866 int 1867 sctp_is_address_in_scope(struct sctp_ifa *ifa, 1868 struct sctp_scoping *scope, 1869 int do_update) 1870 { 1871 if ((scope->loopback_scope == 0) && 1872 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) { 1873 /* 1874 * skip loopback if not in scope * 1875 */ 1876 return (0); 1877 } 1878 switch (ifa->address.sa.sa_family) { 1879 #ifdef INET 1880 case AF_INET: 1881 if (scope->ipv4_addr_legal) { 1882 struct sockaddr_in *sin; 1883 1884 sin = &ifa->address.sin; 1885 if (sin->sin_addr.s_addr == 0) { 1886 /* not in scope , unspecified */ 1887 return (0); 1888 } 1889 if ((scope->ipv4_local_scope == 0) && 1890 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 1891 /* private address not in scope */ 1892 return (0); 1893 } 1894 } else { 1895 return (0); 1896 } 1897 break; 1898 #endif 1899 #ifdef INET6 1900 case AF_INET6: 1901 if (scope->ipv6_addr_legal) { 1902 struct sockaddr_in6 *sin6; 1903 1904 /* 1905 * Must update the flags, bummer, which means any 1906 * IFA locks must now be applied HERE <-> 1907 */ 1908 if (do_update) { 1909 sctp_gather_internal_ifa_flags(ifa); 1910 } 1911 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1912 return (0); 1913 } 1914 /* ok to use deprecated addresses? */ 1915 sin6 = &ifa->address.sin6; 1916 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1917 /* skip unspecifed addresses */ 1918 return (0); 1919 } 1920 if ( /* (local_scope == 0) && */ 1921 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 1922 return (0); 1923 } 1924 if ((scope->site_scope == 0) && 1925 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1926 return (0); 1927 } 1928 } else { 1929 return (0); 1930 } 1931 break; 1932 #endif 1933 default: 1934 return (0); 1935 } 1936 return (1); 1937 } 1938 1939 static struct mbuf * 1940 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t * len) 1941 { 1942 #if defined(INET) || defined(INET6) 1943 struct sctp_paramhdr *parmh; 1944 struct mbuf *mret; 1945 uint16_t plen; 1946 1947 #endif 1948 1949 switch (ifa->address.sa.sa_family) { 1950 #ifdef INET 1951 case AF_INET: 1952 plen = (uint16_t) sizeof(struct sctp_ipv4addr_param); 1953 break; 1954 #endif 1955 #ifdef INET6 1956 case AF_INET6: 1957 plen = (uint16_t) sizeof(struct sctp_ipv6addr_param); 1958 break; 1959 #endif 1960 default: 1961 return (m); 1962 } 1963 #if defined(INET) || defined(INET6) 1964 if (M_TRAILINGSPACE(m) >= plen) { 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(plen, 0, M_NOWAIT, 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 = &ifa->address.sin; 1991 ipv4p = (struct sctp_ipv4addr_param *)parmh; 1992 parmh->param_type = htons(SCTP_IPV4_ADDRESS); 1993 parmh->param_length = htons(plen); 1994 ipv4p->addr = sin->sin_addr.s_addr; 1995 SCTP_BUF_LEN(mret) += plen; 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 = &ifa->address.sin6; 2006 ipv6p = (struct sctp_ipv6addr_param *)parmh; 2007 parmh->param_type = htons(SCTP_IPV6_ADDRESS); 2008 parmh->param_length = htons(plen); 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) += plen; 2014 break; 2015 } 2016 #endif 2017 default: 2018 return (m); 2019 } 2020 if (len != NULL) { 2021 *len += plen; 2022 } 2023 return (mret); 2024 #endif 2025 } 2026 2027 2028 struct mbuf * 2029 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2030 struct sctp_scoping *scope, 2031 struct mbuf *m_at, int cnt_inits_to, 2032 uint16_t * padding_len, uint16_t * chunk_len) 2033 { 2034 struct sctp_vrf *vrf = NULL; 2035 int cnt, limit_out = 0, total_count; 2036 uint32_t vrf_id; 2037 2038 vrf_id = inp->def_vrf_id; 2039 SCTP_IPI_ADDR_RLOCK(); 2040 vrf = sctp_find_vrf(vrf_id); 2041 if (vrf == NULL) { 2042 SCTP_IPI_ADDR_RUNLOCK(); 2043 return (m_at); 2044 } 2045 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 2046 struct sctp_ifa *sctp_ifap; 2047 struct sctp_ifn *sctp_ifnp; 2048 2049 cnt = cnt_inits_to; 2050 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) { 2051 limit_out = 1; 2052 cnt = SCTP_ADDRESS_LIMIT; 2053 goto skip_count; 2054 } 2055 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 2056 if ((scope->loopback_scope == 0) && 2057 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { 2058 /* 2059 * Skip loopback devices if loopback_scope 2060 * not set 2061 */ 2062 continue; 2063 } 2064 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 2065 #ifdef INET 2066 if ((sctp_ifap->address.sa.sa_family == AF_INET) && 2067 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2068 &sctp_ifap->address.sin.sin_addr) != 0)) { 2069 continue; 2070 } 2071 #endif 2072 #ifdef INET6 2073 if ((sctp_ifap->address.sa.sa_family == AF_INET6) && 2074 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2075 &sctp_ifap->address.sin6.sin6_addr) != 0)) { 2076 continue; 2077 } 2078 #endif 2079 if (sctp_is_addr_restricted(stcb, sctp_ifap)) { 2080 continue; 2081 } 2082 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) { 2083 continue; 2084 } 2085 cnt++; 2086 if (cnt > SCTP_ADDRESS_LIMIT) { 2087 break; 2088 } 2089 } 2090 if (cnt > SCTP_ADDRESS_LIMIT) { 2091 break; 2092 } 2093 } 2094 skip_count: 2095 if (cnt > 1) { 2096 total_count = 0; 2097 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 2098 cnt = 0; 2099 if ((scope->loopback_scope == 0) && 2100 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { 2101 /* 2102 * Skip loopback devices if 2103 * loopback_scope not set 2104 */ 2105 continue; 2106 } 2107 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 2108 #ifdef INET 2109 if ((sctp_ifap->address.sa.sa_family == AF_INET) && 2110 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2111 &sctp_ifap->address.sin.sin_addr) != 0)) { 2112 continue; 2113 } 2114 #endif 2115 #ifdef INET6 2116 if ((sctp_ifap->address.sa.sa_family == AF_INET6) && 2117 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2118 &sctp_ifap->address.sin6.sin6_addr) != 0)) { 2119 continue; 2120 } 2121 #endif 2122 if (sctp_is_addr_restricted(stcb, sctp_ifap)) { 2123 continue; 2124 } 2125 if (sctp_is_address_in_scope(sctp_ifap, 2126 scope, 0) == 0) { 2127 continue; 2128 } 2129 if ((chunk_len != NULL) && 2130 (padding_len != NULL) && 2131 (*padding_len > 0)) { 2132 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len); 2133 SCTP_BUF_LEN(m_at) += *padding_len; 2134 *chunk_len += *padding_len; 2135 *padding_len = 0; 2136 } 2137 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len); 2138 if (limit_out) { 2139 cnt++; 2140 total_count++; 2141 if (cnt >= 2) { 2142 /* 2143 * two from each 2144 * address 2145 */ 2146 break; 2147 } 2148 if (total_count > SCTP_ADDRESS_LIMIT) { 2149 /* No more addresses */ 2150 break; 2151 } 2152 } 2153 } 2154 } 2155 } 2156 } else { 2157 struct sctp_laddr *laddr; 2158 2159 cnt = cnt_inits_to; 2160 /* First, how many ? */ 2161 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2162 if (laddr->ifa == NULL) { 2163 continue; 2164 } 2165 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 2166 /* 2167 * Address being deleted by the system, dont 2168 * list. 2169 */ 2170 continue; 2171 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2172 /* 2173 * Address being deleted on this ep don't 2174 * list. 2175 */ 2176 continue; 2177 } 2178 if (sctp_is_address_in_scope(laddr->ifa, 2179 scope, 1) == 0) { 2180 continue; 2181 } 2182 cnt++; 2183 } 2184 /* 2185 * To get through a NAT we only list addresses if we have 2186 * more than one. That way if you just bind a single address 2187 * we let the source of the init dictate our address. 2188 */ 2189 if (cnt > 1) { 2190 cnt = cnt_inits_to; 2191 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2192 if (laddr->ifa == NULL) { 2193 continue; 2194 } 2195 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 2196 continue; 2197 } 2198 if (sctp_is_address_in_scope(laddr->ifa, 2199 scope, 0) == 0) { 2200 continue; 2201 } 2202 if ((chunk_len != NULL) && 2203 (padding_len != NULL) && 2204 (*padding_len > 0)) { 2205 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len); 2206 SCTP_BUF_LEN(m_at) += *padding_len; 2207 *chunk_len += *padding_len; 2208 *padding_len = 0; 2209 } 2210 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len); 2211 cnt++; 2212 if (cnt >= SCTP_ADDRESS_LIMIT) { 2213 break; 2214 } 2215 } 2216 } 2217 } 2218 SCTP_IPI_ADDR_RUNLOCK(); 2219 return (m_at); 2220 } 2221 2222 static struct sctp_ifa * 2223 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa, 2224 uint8_t dest_is_loop, 2225 uint8_t dest_is_priv, 2226 sa_family_t fam) 2227 { 2228 uint8_t dest_is_global = 0; 2229 2230 /* dest_is_priv is true if destination is a private address */ 2231 /* dest_is_loop is true if destination is a loopback addresses */ 2232 2233 /** 2234 * Here we determine if its a preferred address. A preferred address 2235 * means it is the same scope or higher scope then the destination. 2236 * L = loopback, P = private, G = global 2237 * ----------------------------------------- 2238 * src | dest | result 2239 * ---------------------------------------- 2240 * L | L | yes 2241 * ----------------------------------------- 2242 * P | L | yes-v4 no-v6 2243 * ----------------------------------------- 2244 * G | L | yes-v4 no-v6 2245 * ----------------------------------------- 2246 * L | P | no 2247 * ----------------------------------------- 2248 * P | P | yes 2249 * ----------------------------------------- 2250 * G | P | no 2251 * ----------------------------------------- 2252 * L | G | no 2253 * ----------------------------------------- 2254 * P | G | no 2255 * ----------------------------------------- 2256 * G | G | yes 2257 * ----------------------------------------- 2258 */ 2259 2260 if (ifa->address.sa.sa_family != fam) { 2261 /* forget mis-matched family */ 2262 return (NULL); 2263 } 2264 if ((dest_is_priv == 0) && (dest_is_loop == 0)) { 2265 dest_is_global = 1; 2266 } 2267 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:"); 2268 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa); 2269 /* Ok the address may be ok */ 2270 #ifdef INET6 2271 if (fam == AF_INET6) { 2272 /* ok to use deprecated addresses? no lets not! */ 2273 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2274 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n"); 2275 return (NULL); 2276 } 2277 if (ifa->src_is_priv && !ifa->src_is_loop) { 2278 if (dest_is_loop) { 2279 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n"); 2280 return (NULL); 2281 } 2282 } 2283 if (ifa->src_is_glob) { 2284 if (dest_is_loop) { 2285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n"); 2286 return (NULL); 2287 } 2288 } 2289 } 2290 #endif 2291 /* 2292 * Now that we know what is what, implement or table this could in 2293 * theory be done slicker (it used to be), but this is 2294 * straightforward and easier to validate :-) 2295 */ 2296 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n", 2297 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob); 2298 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n", 2299 dest_is_loop, dest_is_priv, dest_is_global); 2300 2301 if ((ifa->src_is_loop) && (dest_is_priv)) { 2302 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n"); 2303 return (NULL); 2304 } 2305 if ((ifa->src_is_glob) && (dest_is_priv)) { 2306 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n"); 2307 return (NULL); 2308 } 2309 if ((ifa->src_is_loop) && (dest_is_global)) { 2310 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n"); 2311 return (NULL); 2312 } 2313 if ((ifa->src_is_priv) && (dest_is_global)) { 2314 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n"); 2315 return (NULL); 2316 } 2317 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n"); 2318 /* its a preferred address */ 2319 return (ifa); 2320 } 2321 2322 static struct sctp_ifa * 2323 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa, 2324 uint8_t dest_is_loop, 2325 uint8_t dest_is_priv, 2326 sa_family_t fam) 2327 { 2328 uint8_t dest_is_global = 0; 2329 2330 /** 2331 * Here we determine if its a acceptable address. A acceptable 2332 * address means it is the same scope or higher scope but we can 2333 * allow for NAT which means its ok to have a global dest and a 2334 * private src. 2335 * 2336 * L = loopback, P = private, G = global 2337 * ----------------------------------------- 2338 * src | dest | result 2339 * ----------------------------------------- 2340 * L | L | yes 2341 * ----------------------------------------- 2342 * P | L | yes-v4 no-v6 2343 * ----------------------------------------- 2344 * G | L | yes 2345 * ----------------------------------------- 2346 * L | P | no 2347 * ----------------------------------------- 2348 * P | P | yes 2349 * ----------------------------------------- 2350 * G | P | yes - May not work 2351 * ----------------------------------------- 2352 * L | G | no 2353 * ----------------------------------------- 2354 * P | G | yes - May not work 2355 * ----------------------------------------- 2356 * G | G | yes 2357 * ----------------------------------------- 2358 */ 2359 2360 if (ifa->address.sa.sa_family != fam) { 2361 /* forget non matching family */ 2362 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n", 2363 ifa->address.sa.sa_family, fam); 2364 return (NULL); 2365 } 2366 /* Ok the address may be ok */ 2367 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa); 2368 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n", 2369 dest_is_loop, dest_is_priv); 2370 if ((dest_is_loop == 0) && (dest_is_priv == 0)) { 2371 dest_is_global = 1; 2372 } 2373 #ifdef INET6 2374 if (fam == AF_INET6) { 2375 /* ok to use deprecated addresses? */ 2376 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2377 return (NULL); 2378 } 2379 if (ifa->src_is_priv) { 2380 /* Special case, linklocal to loop */ 2381 if (dest_is_loop) 2382 return (NULL); 2383 } 2384 } 2385 #endif 2386 /* 2387 * Now that we know what is what, implement our table. This could in 2388 * theory be done slicker (it used to be), but this is 2389 * straightforward and easier to validate :-) 2390 */ 2391 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n", 2392 ifa->src_is_loop, 2393 dest_is_priv); 2394 if ((ifa->src_is_loop == 1) && (dest_is_priv)) { 2395 return (NULL); 2396 } 2397 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n", 2398 ifa->src_is_loop, 2399 dest_is_global); 2400 if ((ifa->src_is_loop == 1) && (dest_is_global)) { 2401 return (NULL); 2402 } 2403 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n"); 2404 /* its an acceptable address */ 2405 return (ifa); 2406 } 2407 2408 int 2409 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 2410 { 2411 struct sctp_laddr *laddr; 2412 2413 if (stcb == NULL) { 2414 /* There are no restrictions, no TCB :-) */ 2415 return (0); 2416 } 2417 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 2418 if (laddr->ifa == NULL) { 2419 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n", 2420 __FUNCTION__); 2421 continue; 2422 } 2423 if (laddr->ifa == ifa) { 2424 /* Yes it is on the list */ 2425 return (1); 2426 } 2427 } 2428 return (0); 2429 } 2430 2431 2432 int 2433 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 2434 { 2435 struct sctp_laddr *laddr; 2436 2437 if (ifa == NULL) 2438 return (0); 2439 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2440 if (laddr->ifa == NULL) { 2441 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n", 2442 __FUNCTION__); 2443 continue; 2444 } 2445 if ((laddr->ifa == ifa) && laddr->action == 0) 2446 /* same pointer */ 2447 return (1); 2448 } 2449 return (0); 2450 } 2451 2452 2453 2454 static struct sctp_ifa * 2455 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp, 2456 sctp_route_t * ro, 2457 uint32_t vrf_id, 2458 int non_asoc_addr_ok, 2459 uint8_t dest_is_priv, 2460 uint8_t dest_is_loop, 2461 sa_family_t fam) 2462 { 2463 struct sctp_laddr *laddr, *starting_point; 2464 void *ifn; 2465 int resettotop = 0; 2466 struct sctp_ifn *sctp_ifn; 2467 struct sctp_ifa *sctp_ifa, *sifa; 2468 struct sctp_vrf *vrf; 2469 uint32_t ifn_index; 2470 2471 vrf = sctp_find_vrf(vrf_id); 2472 if (vrf == NULL) 2473 return (NULL); 2474 2475 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2476 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2477 sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2478 /* 2479 * first question, is the ifn we will emit on in our list, if so, we 2480 * want such an address. Note that we first looked for a preferred 2481 * address. 2482 */ 2483 if (sctp_ifn) { 2484 /* is a preferred one on the interface we route out? */ 2485 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2486 #ifdef INET 2487 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 2488 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2489 &sctp_ifa->address.sin.sin_addr) != 0)) { 2490 continue; 2491 } 2492 #endif 2493 #ifdef INET6 2494 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 2495 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2496 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 2497 continue; 2498 } 2499 #endif 2500 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2501 (non_asoc_addr_ok == 0)) 2502 continue; 2503 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, 2504 dest_is_loop, 2505 dest_is_priv, fam); 2506 if (sifa == NULL) 2507 continue; 2508 if (sctp_is_addr_in_ep(inp, sifa)) { 2509 atomic_add_int(&sifa->refcount, 1); 2510 return (sifa); 2511 } 2512 } 2513 } 2514 /* 2515 * ok, now we now need to find one on the list of the addresses. We 2516 * can't get one on the emitting interface so let's find first a 2517 * preferred one. If not that an acceptable one otherwise... we 2518 * return NULL. 2519 */ 2520 starting_point = inp->next_addr_touse; 2521 once_again: 2522 if (inp->next_addr_touse == NULL) { 2523 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); 2524 resettotop = 1; 2525 } 2526 for (laddr = inp->next_addr_touse; laddr; 2527 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2528 if (laddr->ifa == NULL) { 2529 /* address has been removed */ 2530 continue; 2531 } 2532 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2533 /* address is being deleted */ 2534 continue; 2535 } 2536 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, 2537 dest_is_priv, fam); 2538 if (sifa == NULL) 2539 continue; 2540 atomic_add_int(&sifa->refcount, 1); 2541 return (sifa); 2542 } 2543 if (resettotop == 0) { 2544 inp->next_addr_touse = NULL; 2545 goto once_again; 2546 } 2547 inp->next_addr_touse = starting_point; 2548 resettotop = 0; 2549 once_again_too: 2550 if (inp->next_addr_touse == NULL) { 2551 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); 2552 resettotop = 1; 2553 } 2554 /* ok, what about an acceptable address in the inp */ 2555 for (laddr = inp->next_addr_touse; laddr; 2556 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2557 if (laddr->ifa == NULL) { 2558 /* address has been removed */ 2559 continue; 2560 } 2561 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2562 /* address is being deleted */ 2563 continue; 2564 } 2565 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, 2566 dest_is_priv, fam); 2567 if (sifa == NULL) 2568 continue; 2569 atomic_add_int(&sifa->refcount, 1); 2570 return (sifa); 2571 } 2572 if (resettotop == 0) { 2573 inp->next_addr_touse = NULL; 2574 goto once_again_too; 2575 } 2576 /* 2577 * no address bound can be a source for the destination we are in 2578 * trouble 2579 */ 2580 return (NULL); 2581 } 2582 2583 2584 2585 static struct sctp_ifa * 2586 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp, 2587 struct sctp_tcb *stcb, 2588 sctp_route_t * ro, 2589 uint32_t vrf_id, 2590 uint8_t dest_is_priv, 2591 uint8_t dest_is_loop, 2592 int non_asoc_addr_ok, 2593 sa_family_t fam) 2594 { 2595 struct sctp_laddr *laddr, *starting_point; 2596 void *ifn; 2597 struct sctp_ifn *sctp_ifn; 2598 struct sctp_ifa *sctp_ifa, *sifa; 2599 uint8_t start_at_beginning = 0; 2600 struct sctp_vrf *vrf; 2601 uint32_t ifn_index; 2602 2603 /* 2604 * first question, is the ifn we will emit on in our list, if so, we 2605 * want that one. 2606 */ 2607 vrf = sctp_find_vrf(vrf_id); 2608 if (vrf == NULL) 2609 return (NULL); 2610 2611 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2612 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2613 sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2614 2615 /* 2616 * first question, is the ifn we will emit on in our list? If so, 2617 * we want that one. First we look for a preferred. Second, we go 2618 * for an acceptable. 2619 */ 2620 if (sctp_ifn) { 2621 /* first try for a preferred address on the ep */ 2622 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2623 #ifdef INET 2624 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 2625 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2626 &sctp_ifa->address.sin.sin_addr) != 0)) { 2627 continue; 2628 } 2629 #endif 2630 #ifdef INET6 2631 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 2632 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2633 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 2634 continue; 2635 } 2636 #endif 2637 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2638 continue; 2639 if (sctp_is_addr_in_ep(inp, sctp_ifa)) { 2640 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam); 2641 if (sifa == NULL) 2642 continue; 2643 if (((non_asoc_addr_ok == 0) && 2644 (sctp_is_addr_restricted(stcb, sifa))) || 2645 (non_asoc_addr_ok && 2646 (sctp_is_addr_restricted(stcb, sifa)) && 2647 (!sctp_is_addr_pending(stcb, sifa)))) { 2648 /* on the no-no list */ 2649 continue; 2650 } 2651 atomic_add_int(&sifa->refcount, 1); 2652 return (sifa); 2653 } 2654 } 2655 /* next try for an acceptable address on the ep */ 2656 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2657 #ifdef INET 2658 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 2659 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2660 &sctp_ifa->address.sin.sin_addr) != 0)) { 2661 continue; 2662 } 2663 #endif 2664 #ifdef INET6 2665 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 2666 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2667 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 2668 continue; 2669 } 2670 #endif 2671 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2672 continue; 2673 if (sctp_is_addr_in_ep(inp, sctp_ifa)) { 2674 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam); 2675 if (sifa == NULL) 2676 continue; 2677 if (((non_asoc_addr_ok == 0) && 2678 (sctp_is_addr_restricted(stcb, sifa))) || 2679 (non_asoc_addr_ok && 2680 (sctp_is_addr_restricted(stcb, sifa)) && 2681 (!sctp_is_addr_pending(stcb, sifa)))) { 2682 /* on the no-no list */ 2683 continue; 2684 } 2685 atomic_add_int(&sifa->refcount, 1); 2686 return (sifa); 2687 } 2688 } 2689 2690 } 2691 /* 2692 * if we can't find one like that then we must look at all addresses 2693 * bound to pick one at first preferable then secondly acceptable. 2694 */ 2695 starting_point = stcb->asoc.last_used_address; 2696 sctp_from_the_top: 2697 if (stcb->asoc.last_used_address == NULL) { 2698 start_at_beginning = 1; 2699 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); 2700 } 2701 /* search beginning with the last used address */ 2702 for (laddr = stcb->asoc.last_used_address; laddr; 2703 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2704 if (laddr->ifa == NULL) { 2705 /* address has been removed */ 2706 continue; 2707 } 2708 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2709 /* address is being deleted */ 2710 continue; 2711 } 2712 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam); 2713 if (sifa == NULL) 2714 continue; 2715 if (((non_asoc_addr_ok == 0) && 2716 (sctp_is_addr_restricted(stcb, sifa))) || 2717 (non_asoc_addr_ok && 2718 (sctp_is_addr_restricted(stcb, sifa)) && 2719 (!sctp_is_addr_pending(stcb, sifa)))) { 2720 /* on the no-no list */ 2721 continue; 2722 } 2723 stcb->asoc.last_used_address = laddr; 2724 atomic_add_int(&sifa->refcount, 1); 2725 return (sifa); 2726 } 2727 if (start_at_beginning == 0) { 2728 stcb->asoc.last_used_address = NULL; 2729 goto sctp_from_the_top; 2730 } 2731 /* now try for any higher scope than the destination */ 2732 stcb->asoc.last_used_address = starting_point; 2733 start_at_beginning = 0; 2734 sctp_from_the_top2: 2735 if (stcb->asoc.last_used_address == NULL) { 2736 start_at_beginning = 1; 2737 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); 2738 } 2739 /* search beginning with the last used address */ 2740 for (laddr = stcb->asoc.last_used_address; laddr; 2741 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2742 if (laddr->ifa == NULL) { 2743 /* address has been removed */ 2744 continue; 2745 } 2746 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2747 /* address is being deleted */ 2748 continue; 2749 } 2750 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, 2751 dest_is_priv, fam); 2752 if (sifa == NULL) 2753 continue; 2754 if (((non_asoc_addr_ok == 0) && 2755 (sctp_is_addr_restricted(stcb, sifa))) || 2756 (non_asoc_addr_ok && 2757 (sctp_is_addr_restricted(stcb, sifa)) && 2758 (!sctp_is_addr_pending(stcb, sifa)))) { 2759 /* on the no-no list */ 2760 continue; 2761 } 2762 stcb->asoc.last_used_address = laddr; 2763 atomic_add_int(&sifa->refcount, 1); 2764 return (sifa); 2765 } 2766 if (start_at_beginning == 0) { 2767 stcb->asoc.last_used_address = NULL; 2768 goto sctp_from_the_top2; 2769 } 2770 return (NULL); 2771 } 2772 2773 static struct sctp_ifa * 2774 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn, 2775 struct sctp_inpcb *inp, 2776 struct sctp_tcb *stcb, 2777 int non_asoc_addr_ok, 2778 uint8_t dest_is_loop, 2779 uint8_t dest_is_priv, 2780 int addr_wanted, 2781 sa_family_t fam, 2782 sctp_route_t * ro 2783 ) 2784 { 2785 struct sctp_ifa *ifa, *sifa; 2786 int num_eligible_addr = 0; 2787 2788 #ifdef INET6 2789 struct sockaddr_in6 sin6, lsa6; 2790 2791 if (fam == AF_INET6) { 2792 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6)); 2793 (void)sa6_recoverscope(&sin6); 2794 } 2795 #endif /* INET6 */ 2796 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { 2797 #ifdef INET 2798 if ((ifa->address.sa.sa_family == AF_INET) && 2799 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2800 &ifa->address.sin.sin_addr) != 0)) { 2801 continue; 2802 } 2803 #endif 2804 #ifdef INET6 2805 if ((ifa->address.sa.sa_family == AF_INET6) && 2806 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2807 &ifa->address.sin6.sin6_addr) != 0)) { 2808 continue; 2809 } 2810 #endif 2811 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2812 (non_asoc_addr_ok == 0)) 2813 continue; 2814 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, 2815 dest_is_priv, fam); 2816 if (sifa == NULL) 2817 continue; 2818 #ifdef INET6 2819 if (fam == AF_INET6 && 2820 dest_is_loop && 2821 sifa->src_is_loop && sifa->src_is_priv) { 2822 /* 2823 * don't allow fe80::1 to be a src on loop ::1, we 2824 * don't list it to the peer so we will get an 2825 * abort. 2826 */ 2827 continue; 2828 } 2829 if (fam == AF_INET6 && 2830 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) && 2831 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 2832 /* 2833 * link-local <-> link-local must belong to the same 2834 * scope. 2835 */ 2836 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6)); 2837 (void)sa6_recoverscope(&lsa6); 2838 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) { 2839 continue; 2840 } 2841 } 2842 #endif /* INET6 */ 2843 2844 /* 2845 * Check if the IPv6 address matches to next-hop. In the 2846 * mobile case, old IPv6 address may be not deleted from the 2847 * interface. Then, the interface has previous and new 2848 * addresses. We should use one corresponding to the 2849 * next-hop. (by micchie) 2850 */ 2851 #ifdef INET6 2852 if (stcb && fam == AF_INET6 && 2853 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) { 2854 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro) 2855 == 0) { 2856 continue; 2857 } 2858 } 2859 #endif 2860 #ifdef INET 2861 /* Avoid topologically incorrect IPv4 address */ 2862 if (stcb && fam == AF_INET && 2863 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) { 2864 if (sctp_v4src_match_nexthop(sifa, ro) == 0) { 2865 continue; 2866 } 2867 } 2868 #endif 2869 if (stcb) { 2870 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2871 continue; 2872 } 2873 if (((non_asoc_addr_ok == 0) && 2874 (sctp_is_addr_restricted(stcb, sifa))) || 2875 (non_asoc_addr_ok && 2876 (sctp_is_addr_restricted(stcb, sifa)) && 2877 (!sctp_is_addr_pending(stcb, sifa)))) { 2878 /* 2879 * It is restricted for some reason.. 2880 * probably not yet added. 2881 */ 2882 continue; 2883 } 2884 } 2885 if (num_eligible_addr >= addr_wanted) { 2886 return (sifa); 2887 } 2888 num_eligible_addr++; 2889 } 2890 return (NULL); 2891 } 2892 2893 2894 static int 2895 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn, 2896 struct sctp_inpcb *inp, 2897 struct sctp_tcb *stcb, 2898 int non_asoc_addr_ok, 2899 uint8_t dest_is_loop, 2900 uint8_t dest_is_priv, 2901 sa_family_t fam) 2902 { 2903 struct sctp_ifa *ifa, *sifa; 2904 int num_eligible_addr = 0; 2905 2906 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { 2907 #ifdef INET 2908 if ((ifa->address.sa.sa_family == AF_INET) && 2909 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2910 &ifa->address.sin.sin_addr) != 0)) { 2911 continue; 2912 } 2913 #endif 2914 #ifdef INET6 2915 if ((ifa->address.sa.sa_family == AF_INET6) && 2916 (stcb != NULL) && 2917 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2918 &ifa->address.sin6.sin6_addr) != 0)) { 2919 continue; 2920 } 2921 #endif 2922 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2923 (non_asoc_addr_ok == 0)) { 2924 continue; 2925 } 2926 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, 2927 dest_is_priv, fam); 2928 if (sifa == NULL) { 2929 continue; 2930 } 2931 if (stcb) { 2932 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2933 continue; 2934 } 2935 if (((non_asoc_addr_ok == 0) && 2936 (sctp_is_addr_restricted(stcb, sifa))) || 2937 (non_asoc_addr_ok && 2938 (sctp_is_addr_restricted(stcb, sifa)) && 2939 (!sctp_is_addr_pending(stcb, sifa)))) { 2940 /* 2941 * It is restricted for some reason.. 2942 * probably not yet added. 2943 */ 2944 continue; 2945 } 2946 } 2947 num_eligible_addr++; 2948 } 2949 return (num_eligible_addr); 2950 } 2951 2952 static struct sctp_ifa * 2953 sctp_choose_boundall(struct sctp_inpcb *inp, 2954 struct sctp_tcb *stcb, 2955 struct sctp_nets *net, 2956 sctp_route_t * ro, 2957 uint32_t vrf_id, 2958 uint8_t dest_is_priv, 2959 uint8_t dest_is_loop, 2960 int non_asoc_addr_ok, 2961 sa_family_t fam) 2962 { 2963 int cur_addr_num = 0, num_preferred = 0; 2964 void *ifn; 2965 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn; 2966 struct sctp_ifa *sctp_ifa, *sifa; 2967 uint32_t ifn_index; 2968 struct sctp_vrf *vrf; 2969 2970 #ifdef INET 2971 int retried = 0; 2972 2973 #endif 2974 2975 /*- 2976 * For boundall we can use any address in the association. 2977 * If non_asoc_addr_ok is set we can use any address (at least in 2978 * theory). So we look for preferred addresses first. If we find one, 2979 * we use it. Otherwise we next try to get an address on the 2980 * interface, which we should be able to do (unless non_asoc_addr_ok 2981 * is false and we are routed out that way). In these cases where we 2982 * can't use the address of the interface we go through all the 2983 * ifn's looking for an address we can use and fill that in. Punting 2984 * means we send back address 0, which will probably cause problems 2985 * actually since then IP will fill in the address of the route ifn, 2986 * which means we probably already rejected it.. i.e. here comes an 2987 * abort :-<. 2988 */ 2989 vrf = sctp_find_vrf(vrf_id); 2990 if (vrf == NULL) 2991 return (NULL); 2992 2993 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2994 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2995 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index); 2996 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2997 if (sctp_ifn == NULL) { 2998 /* ?? We don't have this guy ?? */ 2999 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n"); 3000 goto bound_all_plan_b; 3001 } 3002 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n", 3003 ifn_index, sctp_ifn->ifn_name); 3004 3005 if (net) { 3006 cur_addr_num = net->indx_of_eligible_next_to_use; 3007 } 3008 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, 3009 inp, stcb, 3010 non_asoc_addr_ok, 3011 dest_is_loop, 3012 dest_is_priv, fam); 3013 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n", 3014 num_preferred, sctp_ifn->ifn_name); 3015 if (num_preferred == 0) { 3016 /* 3017 * no eligible addresses, we must use some other interface 3018 * address if we can find one. 3019 */ 3020 goto bound_all_plan_b; 3021 } 3022 /* 3023 * Ok we have num_eligible_addr set with how many we can use, this 3024 * may vary from call to call due to addresses being deprecated 3025 * etc.. 3026 */ 3027 if (cur_addr_num >= num_preferred) { 3028 cur_addr_num = 0; 3029 } 3030 /* 3031 * select the nth address from the list (where cur_addr_num is the 3032 * nth) and 0 is the first one, 1 is the second one etc... 3033 */ 3034 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num); 3035 3036 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop, 3037 dest_is_priv, cur_addr_num, fam, ro); 3038 3039 /* if sctp_ifa is NULL something changed??, fall to plan b. */ 3040 if (sctp_ifa) { 3041 atomic_add_int(&sctp_ifa->refcount, 1); 3042 if (net) { 3043 /* save off where the next one we will want */ 3044 net->indx_of_eligible_next_to_use = cur_addr_num + 1; 3045 } 3046 return (sctp_ifa); 3047 } 3048 /* 3049 * plan_b: Look at all interfaces and find a preferred address. If 3050 * no preferred fall through to plan_c. 3051 */ 3052 bound_all_plan_b: 3053 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n"); 3054 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3055 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n", 3056 sctp_ifn->ifn_name); 3057 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3058 /* wrong base scope */ 3059 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n"); 3060 continue; 3061 } 3062 if ((sctp_ifn == looked_at) && looked_at) { 3063 /* already looked at this guy */ 3064 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n"); 3065 continue; 3066 } 3067 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, 3068 dest_is_loop, dest_is_priv, fam); 3069 SCTPDBG(SCTP_DEBUG_OUTPUT2, 3070 "Found ifn:%p %d preferred source addresses\n", 3071 ifn, num_preferred); 3072 if (num_preferred == 0) { 3073 /* None on this interface. */ 3074 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n"); 3075 continue; 3076 } 3077 SCTPDBG(SCTP_DEBUG_OUTPUT2, 3078 "num preferred:%d on interface:%p cur_addr_num:%d\n", 3079 num_preferred, (void *)sctp_ifn, cur_addr_num); 3080 3081 /* 3082 * Ok we have num_eligible_addr set with how many we can 3083 * use, this may vary from call to call due to addresses 3084 * being deprecated etc.. 3085 */ 3086 if (cur_addr_num >= num_preferred) { 3087 cur_addr_num = 0; 3088 } 3089 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop, 3090 dest_is_priv, cur_addr_num, fam, ro); 3091 if (sifa == NULL) 3092 continue; 3093 if (net) { 3094 net->indx_of_eligible_next_to_use = cur_addr_num + 1; 3095 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n", 3096 cur_addr_num); 3097 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:"); 3098 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa); 3099 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:"); 3100 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa); 3101 } 3102 atomic_add_int(&sifa->refcount, 1); 3103 return (sifa); 3104 } 3105 #ifdef INET 3106 again_with_private_addresses_allowed: 3107 #endif 3108 /* plan_c: do we have an acceptable address on the emit interface */ 3109 sifa = NULL; 3110 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n"); 3111 if (emit_ifn == NULL) { 3112 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n"); 3113 goto plan_d; 3114 } 3115 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) { 3116 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa); 3117 #ifdef INET 3118 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 3119 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 3120 &sctp_ifa->address.sin.sin_addr) != 0)) { 3121 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n"); 3122 continue; 3123 } 3124 #endif 3125 #ifdef INET6 3126 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 3127 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 3128 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 3129 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n"); 3130 continue; 3131 } 3132 #endif 3133 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3134 (non_asoc_addr_ok == 0)) { 3135 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n"); 3136 continue; 3137 } 3138 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, 3139 dest_is_priv, fam); 3140 if (sifa == NULL) { 3141 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n"); 3142 continue; 3143 } 3144 if (stcb) { 3145 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) { 3146 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n"); 3147 sifa = NULL; 3148 continue; 3149 } 3150 if (((non_asoc_addr_ok == 0) && 3151 (sctp_is_addr_restricted(stcb, sifa))) || 3152 (non_asoc_addr_ok && 3153 (sctp_is_addr_restricted(stcb, sifa)) && 3154 (!sctp_is_addr_pending(stcb, sifa)))) { 3155 /* 3156 * It is restricted for some reason.. 3157 * probably not yet added. 3158 */ 3159 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n"); 3160 sifa = NULL; 3161 continue; 3162 } 3163 } 3164 atomic_add_int(&sifa->refcount, 1); 3165 goto out; 3166 } 3167 plan_d: 3168 /* 3169 * plan_d: We are in trouble. No preferred address on the emit 3170 * interface. And not even a preferred address on all interfaces. Go 3171 * out and see if we can find an acceptable address somewhere 3172 * amongst all interfaces. 3173 */ 3174 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at); 3175 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3176 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3177 /* wrong base scope */ 3178 continue; 3179 } 3180 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3181 #ifdef INET 3182 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 3183 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 3184 &sctp_ifa->address.sin.sin_addr) != 0)) { 3185 continue; 3186 } 3187 #endif 3188 #ifdef INET6 3189 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 3190 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 3191 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 3192 continue; 3193 } 3194 #endif 3195 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3196 (non_asoc_addr_ok == 0)) 3197 continue; 3198 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, 3199 dest_is_loop, 3200 dest_is_priv, fam); 3201 if (sifa == NULL) 3202 continue; 3203 if (stcb) { 3204 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) { 3205 sifa = NULL; 3206 continue; 3207 } 3208 if (((non_asoc_addr_ok == 0) && 3209 (sctp_is_addr_restricted(stcb, sifa))) || 3210 (non_asoc_addr_ok && 3211 (sctp_is_addr_restricted(stcb, sifa)) && 3212 (!sctp_is_addr_pending(stcb, sifa)))) { 3213 /* 3214 * It is restricted for some 3215 * reason.. probably not yet added. 3216 */ 3217 sifa = NULL; 3218 continue; 3219 } 3220 } 3221 goto out; 3222 } 3223 } 3224 #ifdef INET 3225 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) { 3226 stcb->asoc.scope.ipv4_local_scope = 1; 3227 retried = 1; 3228 goto again_with_private_addresses_allowed; 3229 } else if (retried == 1) { 3230 stcb->asoc.scope.ipv4_local_scope = 0; 3231 } 3232 #endif 3233 out: 3234 #ifdef INET 3235 if (sifa) { 3236 if (retried == 1) { 3237 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3238 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3239 /* wrong base scope */ 3240 continue; 3241 } 3242 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3243 struct sctp_ifa *tmp_sifa; 3244 3245 #ifdef INET 3246 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 3247 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 3248 &sctp_ifa->address.sin.sin_addr) != 0)) { 3249 continue; 3250 } 3251 #endif 3252 #ifdef INET6 3253 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 3254 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 3255 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 3256 continue; 3257 } 3258 #endif 3259 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3260 (non_asoc_addr_ok == 0)) 3261 continue; 3262 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, 3263 dest_is_loop, 3264 dest_is_priv, fam); 3265 if (tmp_sifa == NULL) { 3266 continue; 3267 } 3268 if (tmp_sifa == sifa) { 3269 continue; 3270 } 3271 if (stcb) { 3272 if (sctp_is_address_in_scope(tmp_sifa, 3273 &stcb->asoc.scope, 0) == 0) { 3274 continue; 3275 } 3276 if (((non_asoc_addr_ok == 0) && 3277 (sctp_is_addr_restricted(stcb, tmp_sifa))) || 3278 (non_asoc_addr_ok && 3279 (sctp_is_addr_restricted(stcb, tmp_sifa)) && 3280 (!sctp_is_addr_pending(stcb, tmp_sifa)))) { 3281 /* 3282 * It is restricted 3283 * for some reason.. 3284 * probably not yet 3285 * added. 3286 */ 3287 continue; 3288 } 3289 } 3290 if ((tmp_sifa->address.sin.sin_family == AF_INET) && 3291 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) { 3292 sctp_add_local_addr_restricted(stcb, tmp_sifa); 3293 } 3294 } 3295 } 3296 } 3297 atomic_add_int(&sifa->refcount, 1); 3298 } 3299 #endif 3300 return (sifa); 3301 } 3302 3303 3304 3305 /* tcb may be NULL */ 3306 struct sctp_ifa * 3307 sctp_source_address_selection(struct sctp_inpcb *inp, 3308 struct sctp_tcb *stcb, 3309 sctp_route_t * ro, 3310 struct sctp_nets *net, 3311 int non_asoc_addr_ok, uint32_t vrf_id) 3312 { 3313 struct sctp_ifa *answer; 3314 uint8_t dest_is_priv, dest_is_loop; 3315 sa_family_t fam; 3316 3317 #ifdef INET 3318 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst; 3319 3320 #endif 3321 #ifdef INET6 3322 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst; 3323 3324 #endif 3325 3326 /** 3327 * Rules: - Find the route if needed, cache if I can. - Look at 3328 * interface address in route, Is it in the bound list. If so we 3329 * have the best source. - If not we must rotate amongst the 3330 * addresses. 3331 * 3332 * Cavets and issues 3333 * 3334 * Do we need to pay attention to scope. We can have a private address 3335 * or a global address we are sourcing or sending to. So if we draw 3336 * it out 3337 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3338 * For V4 3339 * ------------------------------------------ 3340 * source * dest * result 3341 * ----------------------------------------- 3342 * <a> Private * Global * NAT 3343 * ----------------------------------------- 3344 * <b> Private * Private * No problem 3345 * ----------------------------------------- 3346 * <c> Global * Private * Huh, How will this work? 3347 * ----------------------------------------- 3348 * <d> Global * Global * No Problem 3349 *------------------------------------------ 3350 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3351 * For V6 3352 *------------------------------------------ 3353 * source * dest * result 3354 * ----------------------------------------- 3355 * <a> Linklocal * Global * 3356 * ----------------------------------------- 3357 * <b> Linklocal * Linklocal * No problem 3358 * ----------------------------------------- 3359 * <c> Global * Linklocal * Huh, How will this work? 3360 * ----------------------------------------- 3361 * <d> Global * Global * No Problem 3362 *------------------------------------------ 3363 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3364 * 3365 * And then we add to that what happens if there are multiple addresses 3366 * assigned to an interface. Remember the ifa on a ifn is a linked 3367 * list of addresses. So one interface can have more than one IP 3368 * address. What happens if we have both a private and a global 3369 * address? Do we then use context of destination to sort out which 3370 * one is best? And what about NAT's sending P->G may get you a NAT 3371 * translation, or should you select the G thats on the interface in 3372 * preference. 3373 * 3374 * Decisions: 3375 * 3376 * - count the number of addresses on the interface. 3377 * - if it is one, no problem except case <c>. 3378 * For <a> we will assume a NAT out there. 3379 * - if there are more than one, then we need to worry about scope P 3380 * or G. We should prefer G -> G and P -> P if possible. 3381 * Then as a secondary fall back to mixed types G->P being a last 3382 * ditch one. 3383 * - The above all works for bound all, but bound specific we need to 3384 * use the same concept but instead only consider the bound 3385 * addresses. If the bound set is NOT assigned to the interface then 3386 * we must use rotation amongst the bound addresses.. 3387 */ 3388 if (ro->ro_rt == NULL) { 3389 /* 3390 * Need a route to cache. 3391 */ 3392 SCTP_RTALLOC(ro, vrf_id, inp->fibnum); 3393 } 3394 if (ro->ro_rt == NULL) { 3395 return (NULL); 3396 } 3397 fam = ro->ro_dst.sa_family; 3398 dest_is_priv = dest_is_loop = 0; 3399 /* Setup our scopes for the destination */ 3400 switch (fam) { 3401 #ifdef INET 3402 case AF_INET: 3403 /* Scope based on outbound address */ 3404 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3405 dest_is_loop = 1; 3406 if (net != NULL) { 3407 /* mark it as local */ 3408 net->addr_is_local = 1; 3409 } 3410 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) { 3411 dest_is_priv = 1; 3412 } 3413 break; 3414 #endif 3415 #ifdef INET6 3416 case AF_INET6: 3417 /* Scope based on outbound address */ 3418 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) || 3419 SCTP_ROUTE_IS_REAL_LOOP(ro)) { 3420 /* 3421 * If the address is a loopback address, which 3422 * consists of "::1" OR "fe80::1%lo0", we are 3423 * loopback scope. But we don't use dest_is_priv 3424 * (link local addresses). 3425 */ 3426 dest_is_loop = 1; 3427 if (net != NULL) { 3428 /* mark it as local */ 3429 net->addr_is_local = 1; 3430 } 3431 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3432 dest_is_priv = 1; 3433 } 3434 break; 3435 #endif 3436 } 3437 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:"); 3438 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst); 3439 SCTP_IPI_ADDR_RLOCK(); 3440 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3441 /* 3442 * Bound all case 3443 */ 3444 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id, 3445 dest_is_priv, dest_is_loop, 3446 non_asoc_addr_ok, fam); 3447 SCTP_IPI_ADDR_RUNLOCK(); 3448 return (answer); 3449 } 3450 /* 3451 * Subset bound case 3452 */ 3453 if (stcb) { 3454 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro, 3455 vrf_id, dest_is_priv, 3456 dest_is_loop, 3457 non_asoc_addr_ok, fam); 3458 } else { 3459 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id, 3460 non_asoc_addr_ok, 3461 dest_is_priv, 3462 dest_is_loop, fam); 3463 } 3464 SCTP_IPI_ADDR_RUNLOCK(); 3465 return (answer); 3466 } 3467 3468 static int 3469 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize) 3470 { 3471 struct cmsghdr cmh; 3472 int tlen, at, found; 3473 struct sctp_sndinfo sndinfo; 3474 struct sctp_prinfo prinfo; 3475 struct sctp_authinfo authinfo; 3476 3477 tlen = SCTP_BUF_LEN(control); 3478 at = 0; 3479 found = 0; 3480 /* 3481 * Independent of how many mbufs, find the c_type inside the control 3482 * structure and copy out the data. 3483 */ 3484 while (at < tlen) { 3485 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3486 /* There is not enough room for one more. */ 3487 return (found); 3488 } 3489 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3490 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { 3491 /* We dont't have a complete CMSG header. */ 3492 return (found); 3493 } 3494 if (((int)cmh.cmsg_len + at) > tlen) { 3495 /* We don't have the complete CMSG. */ 3496 return (found); 3497 } 3498 if ((cmh.cmsg_level == IPPROTO_SCTP) && 3499 ((c_type == cmh.cmsg_type) || 3500 ((c_type == SCTP_SNDRCV) && 3501 ((cmh.cmsg_type == SCTP_SNDINFO) || 3502 (cmh.cmsg_type == SCTP_PRINFO) || 3503 (cmh.cmsg_type == SCTP_AUTHINFO))))) { 3504 if (c_type == cmh.cmsg_type) { 3505 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) { 3506 return (found); 3507 } 3508 /* It is exactly what we want. Copy it out. */ 3509 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data); 3510 return (1); 3511 } else { 3512 struct sctp_sndrcvinfo *sndrcvinfo; 3513 3514 sndrcvinfo = (struct sctp_sndrcvinfo *)data; 3515 if (found == 0) { 3516 if (cpsize < sizeof(struct sctp_sndrcvinfo)) { 3517 return (found); 3518 } 3519 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo)); 3520 } 3521 switch (cmh.cmsg_type) { 3522 case SCTP_SNDINFO: 3523 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) { 3524 return (found); 3525 } 3526 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo); 3527 sndrcvinfo->sinfo_stream = sndinfo.snd_sid; 3528 sndrcvinfo->sinfo_flags = sndinfo.snd_flags; 3529 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid; 3530 sndrcvinfo->sinfo_context = sndinfo.snd_context; 3531 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id; 3532 break; 3533 case SCTP_PRINFO: 3534 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) { 3535 return (found); 3536 } 3537 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo); 3538 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) { 3539 sndrcvinfo->sinfo_timetolive = prinfo.pr_value; 3540 } else { 3541 sndrcvinfo->sinfo_timetolive = 0; 3542 } 3543 sndrcvinfo->sinfo_flags |= prinfo.pr_policy; 3544 break; 3545 case SCTP_AUTHINFO: 3546 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) { 3547 return (found); 3548 } 3549 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo); 3550 sndrcvinfo->sinfo_keynumber_valid = 1; 3551 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber; 3552 break; 3553 default: 3554 return (found); 3555 } 3556 found = 1; 3557 } 3558 } 3559 at += CMSG_ALIGN(cmh.cmsg_len); 3560 } 3561 return (found); 3562 } 3563 3564 static int 3565 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error) 3566 { 3567 struct cmsghdr cmh; 3568 int tlen, at; 3569 struct sctp_initmsg initmsg; 3570 3571 #ifdef INET 3572 struct sockaddr_in sin; 3573 3574 #endif 3575 #ifdef INET6 3576 struct sockaddr_in6 sin6; 3577 3578 #endif 3579 3580 tlen = SCTP_BUF_LEN(control); 3581 at = 0; 3582 while (at < tlen) { 3583 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3584 /* There is not enough room for one more. */ 3585 *error = EINVAL; 3586 return (1); 3587 } 3588 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3589 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { 3590 /* We dont't have a complete CMSG header. */ 3591 *error = EINVAL; 3592 return (1); 3593 } 3594 if (((int)cmh.cmsg_len + at) > tlen) { 3595 /* We don't have the complete CMSG. */ 3596 *error = EINVAL; 3597 return (1); 3598 } 3599 if (cmh.cmsg_level == IPPROTO_SCTP) { 3600 switch (cmh.cmsg_type) { 3601 case SCTP_INIT: 3602 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) { 3603 *error = EINVAL; 3604 return (1); 3605 } 3606 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg); 3607 if (initmsg.sinit_max_attempts) 3608 stcb->asoc.max_init_times = initmsg.sinit_max_attempts; 3609 if (initmsg.sinit_num_ostreams) 3610 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams; 3611 if (initmsg.sinit_max_instreams) 3612 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams; 3613 if (initmsg.sinit_max_init_timeo) 3614 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo; 3615 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) { 3616 struct sctp_stream_out *tmp_str; 3617 unsigned int i; 3618 3619 #if defined(SCTP_DETAILED_STR_STATS) 3620 int j; 3621 3622 #endif 3623 3624 /* Default is NOT correct */ 3625 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n", 3626 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams); 3627 SCTP_TCB_UNLOCK(stcb); 3628 SCTP_MALLOC(tmp_str, 3629 struct sctp_stream_out *, 3630 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)), 3631 SCTP_M_STRMO); 3632 SCTP_TCB_LOCK(stcb); 3633 if (tmp_str != NULL) { 3634 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO); 3635 stcb->asoc.strmout = tmp_str; 3636 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams; 3637 } else { 3638 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt; 3639 } 3640 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 3641 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 3642 stcb->asoc.strmout[i].chunks_on_queues = 0; 3643 stcb->asoc.strmout[i].next_sequence_send = 0; 3644 #if defined(SCTP_DETAILED_STR_STATS) 3645 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) { 3646 stcb->asoc.strmout[i].abandoned_sent[j] = 0; 3647 stcb->asoc.strmout[i].abandoned_unsent[j] = 0; 3648 } 3649 #else 3650 stcb->asoc.strmout[i].abandoned_sent[0] = 0; 3651 stcb->asoc.strmout[i].abandoned_unsent[0] = 0; 3652 #endif 3653 stcb->asoc.strmout[i].stream_no = i; 3654 stcb->asoc.strmout[i].last_msg_incomplete = 0; 3655 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL); 3656 } 3657 } 3658 break; 3659 #ifdef INET 3660 case SCTP_DSTADDRV4: 3661 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) { 3662 *error = EINVAL; 3663 return (1); 3664 } 3665 memset(&sin, 0, sizeof(struct sockaddr_in)); 3666 sin.sin_family = AF_INET; 3667 sin.sin_len = sizeof(struct sockaddr_in); 3668 sin.sin_port = stcb->rport; 3669 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr); 3670 if ((sin.sin_addr.s_addr == INADDR_ANY) || 3671 (sin.sin_addr.s_addr == INADDR_BROADCAST) || 3672 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 3673 *error = EINVAL; 3674 return (1); 3675 } 3676 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, 3677 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3678 *error = ENOBUFS; 3679 return (1); 3680 } 3681 break; 3682 #endif 3683 #ifdef INET6 3684 case SCTP_DSTADDRV6: 3685 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) { 3686 *error = EINVAL; 3687 return (1); 3688 } 3689 memset(&sin6, 0, sizeof(struct sockaddr_in6)); 3690 sin6.sin6_family = AF_INET6; 3691 sin6.sin6_len = sizeof(struct sockaddr_in6); 3692 sin6.sin6_port = stcb->rport; 3693 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr); 3694 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) || 3695 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 3696 *error = EINVAL; 3697 return (1); 3698 } 3699 #ifdef INET 3700 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) { 3701 in6_sin6_2_sin(&sin, &sin6); 3702 if ((sin.sin_addr.s_addr == INADDR_ANY) || 3703 (sin.sin_addr.s_addr == INADDR_BROADCAST) || 3704 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 3705 *error = EINVAL; 3706 return (1); 3707 } 3708 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, 3709 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3710 *error = ENOBUFS; 3711 return (1); 3712 } 3713 } else 3714 #endif 3715 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, 3716 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3717 *error = ENOBUFS; 3718 return (1); 3719 } 3720 break; 3721 #endif 3722 default: 3723 break; 3724 } 3725 } 3726 at += CMSG_ALIGN(cmh.cmsg_len); 3727 } 3728 return (0); 3729 } 3730 3731 static struct sctp_tcb * 3732 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p, 3733 uint16_t port, 3734 struct mbuf *control, 3735 struct sctp_nets **net_p, 3736 int *error) 3737 { 3738 struct cmsghdr cmh; 3739 int tlen, at; 3740 struct sctp_tcb *stcb; 3741 struct sockaddr *addr; 3742 3743 #ifdef INET 3744 struct sockaddr_in sin; 3745 3746 #endif 3747 #ifdef INET6 3748 struct sockaddr_in6 sin6; 3749 3750 #endif 3751 3752 tlen = SCTP_BUF_LEN(control); 3753 at = 0; 3754 while (at < tlen) { 3755 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3756 /* There is not enough room for one more. */ 3757 *error = EINVAL; 3758 return (NULL); 3759 } 3760 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3761 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { 3762 /* We dont't have a complete CMSG header. */ 3763 *error = EINVAL; 3764 return (NULL); 3765 } 3766 if (((int)cmh.cmsg_len + at) > tlen) { 3767 /* We don't have the complete CMSG. */ 3768 *error = EINVAL; 3769 return (NULL); 3770 } 3771 if (cmh.cmsg_level == IPPROTO_SCTP) { 3772 switch (cmh.cmsg_type) { 3773 #ifdef INET 3774 case SCTP_DSTADDRV4: 3775 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) { 3776 *error = EINVAL; 3777 return (NULL); 3778 } 3779 memset(&sin, 0, sizeof(struct sockaddr_in)); 3780 sin.sin_family = AF_INET; 3781 sin.sin_len = sizeof(struct sockaddr_in); 3782 sin.sin_port = port; 3783 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr); 3784 addr = (struct sockaddr *)&sin; 3785 break; 3786 #endif 3787 #ifdef INET6 3788 case SCTP_DSTADDRV6: 3789 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) { 3790 *error = EINVAL; 3791 return (NULL); 3792 } 3793 memset(&sin6, 0, sizeof(struct sockaddr_in6)); 3794 sin6.sin6_family = AF_INET6; 3795 sin6.sin6_len = sizeof(struct sockaddr_in6); 3796 sin6.sin6_port = port; 3797 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr); 3798 #ifdef INET 3799 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) { 3800 in6_sin6_2_sin(&sin, &sin6); 3801 addr = (struct sockaddr *)&sin; 3802 } else 3803 #endif 3804 addr = (struct sockaddr *)&sin6; 3805 break; 3806 #endif 3807 default: 3808 addr = NULL; 3809 break; 3810 } 3811 if (addr) { 3812 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL); 3813 if (stcb != NULL) { 3814 return (stcb); 3815 } 3816 } 3817 } 3818 at += CMSG_ALIGN(cmh.cmsg_len); 3819 } 3820 return (NULL); 3821 } 3822 3823 static struct mbuf * 3824 sctp_add_cookie(struct mbuf *init, int init_offset, 3825 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature) 3826 { 3827 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret; 3828 struct sctp_state_cookie *stc; 3829 struct sctp_paramhdr *ph; 3830 uint8_t *foo; 3831 int sig_offset; 3832 uint16_t cookie_sz; 3833 3834 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) + 3835 sizeof(struct sctp_paramhdr)), 0, 3836 M_NOWAIT, 1, MT_DATA); 3837 if (mret == NULL) { 3838 return (NULL); 3839 } 3840 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT); 3841 if (copy_init == NULL) { 3842 sctp_m_freem(mret); 3843 return (NULL); 3844 } 3845 #ifdef SCTP_MBUF_LOGGING 3846 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 3847 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY); 3848 } 3849 #endif 3850 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL, 3851 M_NOWAIT); 3852 if (copy_initack == NULL) { 3853 sctp_m_freem(mret); 3854 sctp_m_freem(copy_init); 3855 return (NULL); 3856 } 3857 #ifdef SCTP_MBUF_LOGGING 3858 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 3859 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY); 3860 } 3861 #endif 3862 /* easy side we just drop it on the end */ 3863 ph = mtod(mret, struct sctp_paramhdr *); 3864 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) + 3865 sizeof(struct sctp_paramhdr); 3866 stc = (struct sctp_state_cookie *)((caddr_t)ph + 3867 sizeof(struct sctp_paramhdr)); 3868 ph->param_type = htons(SCTP_STATE_COOKIE); 3869 ph->param_length = 0; /* fill in at the end */ 3870 /* Fill in the stc cookie data */ 3871 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie)); 3872 3873 /* tack the INIT and then the INIT-ACK onto the chain */ 3874 cookie_sz = 0; 3875 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3876 cookie_sz += SCTP_BUF_LEN(m_at); 3877 if (SCTP_BUF_NEXT(m_at) == NULL) { 3878 SCTP_BUF_NEXT(m_at) = copy_init; 3879 break; 3880 } 3881 } 3882 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3883 cookie_sz += SCTP_BUF_LEN(m_at); 3884 if (SCTP_BUF_NEXT(m_at) == NULL) { 3885 SCTP_BUF_NEXT(m_at) = copy_initack; 3886 break; 3887 } 3888 } 3889 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3890 cookie_sz += SCTP_BUF_LEN(m_at); 3891 if (SCTP_BUF_NEXT(m_at) == NULL) { 3892 break; 3893 } 3894 } 3895 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA); 3896 if (sig == NULL) { 3897 /* no space, so free the entire chain */ 3898 sctp_m_freem(mret); 3899 return (NULL); 3900 } 3901 SCTP_BUF_LEN(sig) = 0; 3902 SCTP_BUF_NEXT(m_at) = sig; 3903 sig_offset = 0; 3904 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset); 3905 memset(foo, 0, SCTP_SIGNATURE_SIZE); 3906 *signature = foo; 3907 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE; 3908 cookie_sz += SCTP_SIGNATURE_SIZE; 3909 ph->param_length = htons(cookie_sz); 3910 return (mret); 3911 } 3912 3913 3914 static uint8_t 3915 sctp_get_ect(struct sctp_tcb *stcb) 3916 { 3917 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) { 3918 return (SCTP_ECT0_BIT); 3919 } else { 3920 return (0); 3921 } 3922 } 3923 3924 #if defined(INET) || defined(INET6) 3925 static void 3926 sctp_handle_no_route(struct sctp_tcb *stcb, 3927 struct sctp_nets *net, 3928 int so_locked) 3929 { 3930 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n"); 3931 3932 if (net) { 3933 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was "); 3934 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa); 3935 if (net->dest_state & SCTP_ADDR_CONFIRMED) { 3936 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) { 3937 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net); 3938 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 3939 stcb, 0, 3940 (void *)net, 3941 so_locked); 3942 net->dest_state &= ~SCTP_ADDR_REACHABLE; 3943 net->dest_state &= ~SCTP_ADDR_PF; 3944 } 3945 } 3946 if (stcb) { 3947 if (net == stcb->asoc.primary_destination) { 3948 /* need a new primary */ 3949 struct sctp_nets *alt; 3950 3951 alt = sctp_find_alternate_net(stcb, net, 0); 3952 if (alt != net) { 3953 if (stcb->asoc.alternate) { 3954 sctp_free_remote_addr(stcb->asoc.alternate); 3955 } 3956 stcb->asoc.alternate = alt; 3957 atomic_add_int(&stcb->asoc.alternate->ref_count, 1); 3958 if (net->ro._s_addr) { 3959 sctp_free_ifa(net->ro._s_addr); 3960 net->ro._s_addr = NULL; 3961 } 3962 net->src_addr_selected = 0; 3963 } 3964 } 3965 } 3966 } 3967 } 3968 3969 #endif 3970 3971 static int 3972 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp, 3973 struct sctp_tcb *stcb, /* may be NULL */ 3974 struct sctp_nets *net, 3975 struct sockaddr *to, 3976 struct mbuf *m, 3977 uint32_t auth_offset, 3978 struct sctp_auth_chunk *auth, 3979 uint16_t auth_keyid, 3980 int nofragment_flag, 3981 int ecn_ok, 3982 int out_of_asoc_ok, 3983 uint16_t src_port, 3984 uint16_t dest_port, 3985 uint32_t v_tag, 3986 uint16_t port, 3987 union sctp_sockstore *over_addr, 3988 uint8_t mflowtype, uint32_t mflowid, 3989 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 3990 int so_locked SCTP_UNUSED 3991 #else 3992 int so_locked 3993 #endif 3994 ) 3995 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */ 3996 { 3997 /** 3998 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header 3999 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure: 4000 * - fill in the HMAC digest of any AUTH chunk in the packet. 4001 * - calculate and fill in the SCTP checksum. 4002 * - prepend an IP address header. 4003 * - if boundall use INADDR_ANY. 4004 * - if boundspecific do source address selection. 4005 * - set fragmentation option for ipV4. 4006 * - On return from IP output, check/adjust mtu size of output 4007 * interface and smallest_mtu size as well. 4008 */ 4009 /* Will need ifdefs around this */ 4010 struct mbuf *newm; 4011 struct sctphdr *sctphdr; 4012 int packet_length; 4013 int ret; 4014 4015 #if defined(INET) || defined(INET6) 4016 uint32_t vrf_id; 4017 4018 #endif 4019 #if defined(INET) || defined(INET6) 4020 struct mbuf *o_pak; 4021 sctp_route_t *ro = NULL; 4022 struct udphdr *udp = NULL; 4023 4024 #endif 4025 uint8_t tos_value; 4026 4027 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4028 struct socket *so = NULL; 4029 4030 #endif 4031 4032 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) { 4033 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 4034 sctp_m_freem(m); 4035 return (EFAULT); 4036 } 4037 #if defined(INET) || defined(INET6) 4038 if (stcb) { 4039 vrf_id = stcb->asoc.vrf_id; 4040 } else { 4041 vrf_id = inp->def_vrf_id; 4042 } 4043 #endif 4044 /* fill in the HMAC digest for any AUTH chunk in the packet */ 4045 if ((auth != NULL) && (stcb != NULL)) { 4046 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid); 4047 } 4048 if (net) { 4049 tos_value = net->dscp; 4050 } else if (stcb) { 4051 tos_value = stcb->asoc.default_dscp; 4052 } else { 4053 tos_value = inp->sctp_ep.default_dscp; 4054 } 4055 4056 switch (to->sa_family) { 4057 #ifdef INET 4058 case AF_INET: 4059 { 4060 struct ip *ip = NULL; 4061 sctp_route_t iproute; 4062 int len; 4063 4064 len = SCTP_MIN_V4_OVERHEAD; 4065 if (port) { 4066 len += sizeof(struct udphdr); 4067 } 4068 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA); 4069 if (newm == NULL) { 4070 sctp_m_freem(m); 4071 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4072 return (ENOMEM); 4073 } 4074 SCTP_ALIGN_TO_END(newm, len); 4075 SCTP_BUF_LEN(newm) = len; 4076 SCTP_BUF_NEXT(newm) = m; 4077 m = newm; 4078 if (net != NULL) { 4079 m->m_pkthdr.flowid = net->flowid; 4080 M_HASHTYPE_SET(m, net->flowtype); 4081 } else { 4082 m->m_pkthdr.flowid = mflowid; 4083 M_HASHTYPE_SET(m, mflowtype); 4084 } 4085 packet_length = sctp_calculate_len(m); 4086 ip = mtod(m, struct ip *); 4087 ip->ip_v = IPVERSION; 4088 ip->ip_hl = (sizeof(struct ip) >> 2); 4089 if (tos_value == 0) { 4090 /* 4091 * This means especially, that it is not set 4092 * at the SCTP layer. So use the value from 4093 * the IP layer. 4094 */ 4095 tos_value = inp->ip_inp.inp.inp_ip_tos; 4096 } 4097 tos_value &= 0xfc; 4098 if (ecn_ok) { 4099 tos_value |= sctp_get_ect(stcb); 4100 } 4101 if ((nofragment_flag) && (port == 0)) { 4102 ip->ip_off = htons(IP_DF); 4103 } else { 4104 ip->ip_off = htons(0); 4105 } 4106 /* FreeBSD has a function for ip_id's */ 4107 ip->ip_id = ip_newid(); 4108 4109 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl; 4110 ip->ip_len = htons(packet_length); 4111 ip->ip_tos = tos_value; 4112 if (port) { 4113 ip->ip_p = IPPROTO_UDP; 4114 } else { 4115 ip->ip_p = IPPROTO_SCTP; 4116 } 4117 ip->ip_sum = 0; 4118 if (net == NULL) { 4119 ro = &iproute; 4120 memset(&iproute, 0, sizeof(iproute)); 4121 memcpy(&ro->ro_dst, to, to->sa_len); 4122 } else { 4123 ro = (sctp_route_t *) & net->ro; 4124 } 4125 /* Now the address selection part */ 4126 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr; 4127 4128 /* call the routine to select the src address */ 4129 if (net && out_of_asoc_ok == 0) { 4130 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) { 4131 sctp_free_ifa(net->ro._s_addr); 4132 net->ro._s_addr = NULL; 4133 net->src_addr_selected = 0; 4134 if (ro->ro_rt) { 4135 RTFREE(ro->ro_rt); 4136 ro->ro_rt = NULL; 4137 } 4138 } 4139 if (net->src_addr_selected == 0) { 4140 /* Cache the source address */ 4141 net->ro._s_addr = sctp_source_address_selection(inp, stcb, 4142 ro, net, 0, 4143 vrf_id); 4144 net->src_addr_selected = 1; 4145 } 4146 if (net->ro._s_addr == NULL) { 4147 /* No route to host */ 4148 net->src_addr_selected = 0; 4149 sctp_handle_no_route(stcb, net, so_locked); 4150 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4151 sctp_m_freem(m); 4152 return (EHOSTUNREACH); 4153 } 4154 ip->ip_src = net->ro._s_addr->address.sin.sin_addr; 4155 } else { 4156 if (over_addr == NULL) { 4157 struct sctp_ifa *_lsrc; 4158 4159 _lsrc = sctp_source_address_selection(inp, stcb, ro, 4160 net, 4161 out_of_asoc_ok, 4162 vrf_id); 4163 if (_lsrc == NULL) { 4164 sctp_handle_no_route(stcb, net, so_locked); 4165 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4166 sctp_m_freem(m); 4167 return (EHOSTUNREACH); 4168 } 4169 ip->ip_src = _lsrc->address.sin.sin_addr; 4170 sctp_free_ifa(_lsrc); 4171 } else { 4172 ip->ip_src = over_addr->sin.sin_addr; 4173 SCTP_RTALLOC(ro, vrf_id, inp->fibnum); 4174 } 4175 } 4176 if (port) { 4177 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 4178 sctp_handle_no_route(stcb, net, so_locked); 4179 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4180 sctp_m_freem(m); 4181 return (EHOSTUNREACH); 4182 } 4183 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip)); 4184 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4185 udp->uh_dport = port; 4186 udp->uh_ulen = htons(packet_length - sizeof(struct ip)); 4187 if (V_udp_cksum) { 4188 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 4189 } else { 4190 udp->uh_sum = 0; 4191 } 4192 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); 4193 } else { 4194 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip)); 4195 } 4196 4197 sctphdr->src_port = src_port; 4198 sctphdr->dest_port = dest_port; 4199 sctphdr->v_tag = v_tag; 4200 sctphdr->checksum = 0; 4201 4202 /* 4203 * If source address selection fails and we find no 4204 * route then the ip_output should fail as well with 4205 * a NO_ROUTE_TO_HOST type error. We probably should 4206 * catch that somewhere and abort the association 4207 * right away (assuming this is an INIT being sent). 4208 */ 4209 if (ro->ro_rt == NULL) { 4210 /* 4211 * src addr selection failed to find a route 4212 * (or valid source addr), so we can't get 4213 * there from here (yet)! 4214 */ 4215 sctp_handle_no_route(stcb, net, so_locked); 4216 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4217 sctp_m_freem(m); 4218 return (EHOSTUNREACH); 4219 } 4220 if (ro != &iproute) { 4221 memcpy(&iproute, ro, sizeof(*ro)); 4222 } 4223 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n", 4224 (uint32_t) (ntohl(ip->ip_src.s_addr))); 4225 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n", 4226 (uint32_t) (ntohl(ip->ip_dst.s_addr))); 4227 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n", 4228 (void *)ro->ro_rt); 4229 4230 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 4231 /* failed to prepend data, give up */ 4232 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4233 sctp_m_freem(m); 4234 return (ENOMEM); 4235 } 4236 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 4237 if (port) { 4238 #if defined(SCTP_WITH_NO_CSUM) 4239 SCTP_STAT_INCR(sctps_sendnocrc); 4240 #else 4241 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr)); 4242 SCTP_STAT_INCR(sctps_sendswcrc); 4243 #endif 4244 if (V_udp_cksum) { 4245 SCTP_ENABLE_UDP_CSUM(o_pak); 4246 } 4247 } else { 4248 #if defined(SCTP_WITH_NO_CSUM) 4249 SCTP_STAT_INCR(sctps_sendnocrc); 4250 #else 4251 m->m_pkthdr.csum_flags = CSUM_SCTP; 4252 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 4253 SCTP_STAT_INCR(sctps_sendhwcrc); 4254 #endif 4255 } 4256 #ifdef SCTP_PACKET_LOGGING 4257 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 4258 sctp_packet_log(o_pak); 4259 #endif 4260 /* send it out. table id is taken from stcb */ 4261 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4262 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4263 so = SCTP_INP_SO(inp); 4264 SCTP_SOCKET_UNLOCK(so, 0); 4265 } 4266 #endif 4267 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id); 4268 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4269 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4270 atomic_add_int(&stcb->asoc.refcnt, 1); 4271 SCTP_TCB_UNLOCK(stcb); 4272 SCTP_SOCKET_LOCK(so, 0); 4273 SCTP_TCB_LOCK(stcb); 4274 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4275 } 4276 #endif 4277 SCTP_STAT_INCR(sctps_sendpackets); 4278 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 4279 if (ret) 4280 SCTP_STAT_INCR(sctps_senderrors); 4281 4282 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret); 4283 if (net == NULL) { 4284 /* free tempy routes */ 4285 RO_RTFREE(ro); 4286 } else { 4287 /* 4288 * PMTU check versus smallest asoc MTU goes 4289 * here 4290 */ 4291 if ((ro->ro_rt != NULL) && 4292 (net->ro._s_addr)) { 4293 uint32_t mtu; 4294 4295 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); 4296 if (net->port) { 4297 mtu -= sizeof(struct udphdr); 4298 } 4299 if (mtu && (stcb->asoc.smallest_mtu > mtu)) { 4300 sctp_mtu_size_reset(inp, &stcb->asoc, mtu); 4301 net->mtu = mtu; 4302 } 4303 } else if (ro->ro_rt == NULL) { 4304 /* route was freed */ 4305 if (net->ro._s_addr && 4306 net->src_addr_selected) { 4307 sctp_free_ifa(net->ro._s_addr); 4308 net->ro._s_addr = NULL; 4309 } 4310 net->src_addr_selected = 0; 4311 } 4312 } 4313 return (ret); 4314 } 4315 #endif 4316 #ifdef INET6 4317 case AF_INET6: 4318 { 4319 uint32_t flowlabel, flowinfo; 4320 struct ip6_hdr *ip6h; 4321 struct route_in6 ip6route; 4322 struct ifnet *ifp; 4323 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp; 4324 int prev_scope = 0; 4325 struct sockaddr_in6 lsa6_storage; 4326 int error; 4327 u_short prev_port = 0; 4328 int len; 4329 4330 if (net) { 4331 flowlabel = net->flowlabel; 4332 } else if (stcb) { 4333 flowlabel = stcb->asoc.default_flowlabel; 4334 } else { 4335 flowlabel = inp->sctp_ep.default_flowlabel; 4336 } 4337 if (flowlabel == 0) { 4338 /* 4339 * This means especially, that it is not set 4340 * at the SCTP layer. So use the value from 4341 * the IP layer. 4342 */ 4343 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo); 4344 } 4345 flowlabel &= 0x000fffff; 4346 len = SCTP_MIN_OVERHEAD; 4347 if (port) { 4348 len += sizeof(struct udphdr); 4349 } 4350 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA); 4351 if (newm == NULL) { 4352 sctp_m_freem(m); 4353 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4354 return (ENOMEM); 4355 } 4356 SCTP_ALIGN_TO_END(newm, len); 4357 SCTP_BUF_LEN(newm) = len; 4358 SCTP_BUF_NEXT(newm) = m; 4359 m = newm; 4360 if (net != NULL) { 4361 m->m_pkthdr.flowid = net->flowid; 4362 M_HASHTYPE_SET(m, net->flowtype); 4363 } else { 4364 m->m_pkthdr.flowid = mflowid; 4365 M_HASHTYPE_SET(m, mflowtype); 4366 } 4367 packet_length = sctp_calculate_len(m); 4368 4369 ip6h = mtod(m, struct ip6_hdr *); 4370 /* protect *sin6 from overwrite */ 4371 sin6 = (struct sockaddr_in6 *)to; 4372 tmp = *sin6; 4373 sin6 = &tmp; 4374 4375 /* KAME hack: embed scopeid */ 4376 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4377 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4378 return (EINVAL); 4379 } 4380 if (net == NULL) { 4381 memset(&ip6route, 0, sizeof(ip6route)); 4382 ro = (sctp_route_t *) & ip6route; 4383 memcpy(&ro->ro_dst, sin6, sin6->sin6_len); 4384 } else { 4385 ro = (sctp_route_t *) & net->ro; 4386 } 4387 /* 4388 * We assume here that inp_flow is in host byte 4389 * order within the TCB! 4390 */ 4391 if (tos_value == 0) { 4392 /* 4393 * This means especially, that it is not set 4394 * at the SCTP layer. So use the value from 4395 * the IP layer. 4396 */ 4397 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff; 4398 } 4399 tos_value &= 0xfc; 4400 if (ecn_ok) { 4401 tos_value |= sctp_get_ect(stcb); 4402 } 4403 flowinfo = 0x06; 4404 flowinfo <<= 8; 4405 flowinfo |= tos_value; 4406 flowinfo <<= 20; 4407 flowinfo |= flowlabel; 4408 ip6h->ip6_flow = htonl(flowinfo); 4409 if (port) { 4410 ip6h->ip6_nxt = IPPROTO_UDP; 4411 } else { 4412 ip6h->ip6_nxt = IPPROTO_SCTP; 4413 } 4414 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr)); 4415 ip6h->ip6_dst = sin6->sin6_addr; 4416 4417 /* 4418 * Add SRC address selection here: we can only reuse 4419 * to a limited degree the kame src-addr-sel, since 4420 * we can try their selection but it may not be 4421 * bound. 4422 */ 4423 bzero(&lsa6_tmp, sizeof(lsa6_tmp)); 4424 lsa6_tmp.sin6_family = AF_INET6; 4425 lsa6_tmp.sin6_len = sizeof(lsa6_tmp); 4426 lsa6 = &lsa6_tmp; 4427 if (net && out_of_asoc_ok == 0) { 4428 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) { 4429 sctp_free_ifa(net->ro._s_addr); 4430 net->ro._s_addr = NULL; 4431 net->src_addr_selected = 0; 4432 if (ro->ro_rt) { 4433 RTFREE(ro->ro_rt); 4434 ro->ro_rt = NULL; 4435 } 4436 } 4437 if (net->src_addr_selected == 0) { 4438 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4439 /* KAME hack: embed scopeid */ 4440 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4441 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4442 return (EINVAL); 4443 } 4444 /* Cache the source address */ 4445 net->ro._s_addr = sctp_source_address_selection(inp, 4446 stcb, 4447 ro, 4448 net, 4449 0, 4450 vrf_id); 4451 (void)sa6_recoverscope(sin6); 4452 net->src_addr_selected = 1; 4453 } 4454 if (net->ro._s_addr == NULL) { 4455 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n"); 4456 net->src_addr_selected = 0; 4457 sctp_handle_no_route(stcb, net, so_locked); 4458 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4459 sctp_m_freem(m); 4460 return (EHOSTUNREACH); 4461 } 4462 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr; 4463 } else { 4464 sin6 = (struct sockaddr_in6 *)&ro->ro_dst; 4465 /* KAME hack: embed scopeid */ 4466 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4467 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4468 return (EINVAL); 4469 } 4470 if (over_addr == NULL) { 4471 struct sctp_ifa *_lsrc; 4472 4473 _lsrc = sctp_source_address_selection(inp, stcb, ro, 4474 net, 4475 out_of_asoc_ok, 4476 vrf_id); 4477 if (_lsrc == NULL) { 4478 sctp_handle_no_route(stcb, net, so_locked); 4479 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4480 sctp_m_freem(m); 4481 return (EHOSTUNREACH); 4482 } 4483 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr; 4484 sctp_free_ifa(_lsrc); 4485 } else { 4486 lsa6->sin6_addr = over_addr->sin6.sin6_addr; 4487 SCTP_RTALLOC(ro, vrf_id, inp->fibnum); 4488 } 4489 (void)sa6_recoverscope(sin6); 4490 } 4491 lsa6->sin6_port = inp->sctp_lport; 4492 4493 if (ro->ro_rt == NULL) { 4494 /* 4495 * src addr selection failed to find a route 4496 * (or valid source addr), so we can't get 4497 * there from here! 4498 */ 4499 sctp_handle_no_route(stcb, net, so_locked); 4500 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4501 sctp_m_freem(m); 4502 return (EHOSTUNREACH); 4503 } 4504 /* 4505 * XXX: sa6 may not have a valid sin6_scope_id in 4506 * the non-SCOPEDROUTING case. 4507 */ 4508 bzero(&lsa6_storage, sizeof(lsa6_storage)); 4509 lsa6_storage.sin6_family = AF_INET6; 4510 lsa6_storage.sin6_len = sizeof(lsa6_storage); 4511 lsa6_storage.sin6_addr = lsa6->sin6_addr; 4512 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) { 4513 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error); 4514 sctp_m_freem(m); 4515 return (error); 4516 } 4517 /* XXX */ 4518 lsa6_storage.sin6_addr = lsa6->sin6_addr; 4519 lsa6_storage.sin6_port = inp->sctp_lport; 4520 lsa6 = &lsa6_storage; 4521 ip6h->ip6_src = lsa6->sin6_addr; 4522 4523 if (port) { 4524 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 4525 sctp_handle_no_route(stcb, net, so_locked); 4526 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4527 sctp_m_freem(m); 4528 return (EHOSTUNREACH); 4529 } 4530 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); 4531 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4532 udp->uh_dport = port; 4533 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr)); 4534 udp->uh_sum = 0; 4535 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); 4536 } else { 4537 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); 4538 } 4539 4540 sctphdr->src_port = src_port; 4541 sctphdr->dest_port = dest_port; 4542 sctphdr->v_tag = v_tag; 4543 sctphdr->checksum = 0; 4544 4545 /* 4546 * We set the hop limit now since there is a good 4547 * chance that our ro pointer is now filled 4548 */ 4549 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro); 4550 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 4551 4552 #ifdef SCTP_DEBUG 4553 /* Copy to be sure something bad is not happening */ 4554 sin6->sin6_addr = ip6h->ip6_dst; 4555 lsa6->sin6_addr = ip6h->ip6_src; 4556 #endif 4557 4558 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n"); 4559 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: "); 4560 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6); 4561 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: "); 4562 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6); 4563 if (net) { 4564 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4565 /* 4566 * preserve the port and scope for link 4567 * local send 4568 */ 4569 prev_scope = sin6->sin6_scope_id; 4570 prev_port = sin6->sin6_port; 4571 } 4572 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 4573 /* failed to prepend data, give up */ 4574 sctp_m_freem(m); 4575 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4576 return (ENOMEM); 4577 } 4578 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 4579 if (port) { 4580 #if defined(SCTP_WITH_NO_CSUM) 4581 SCTP_STAT_INCR(sctps_sendnocrc); 4582 #else 4583 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 4584 SCTP_STAT_INCR(sctps_sendswcrc); 4585 #endif 4586 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) { 4587 udp->uh_sum = 0xffff; 4588 } 4589 } else { 4590 #if defined(SCTP_WITH_NO_CSUM) 4591 SCTP_STAT_INCR(sctps_sendnocrc); 4592 #else 4593 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6; 4594 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 4595 SCTP_STAT_INCR(sctps_sendhwcrc); 4596 #endif 4597 } 4598 /* send it out. table id is taken from stcb */ 4599 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4600 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4601 so = SCTP_INP_SO(inp); 4602 SCTP_SOCKET_UNLOCK(so, 0); 4603 } 4604 #endif 4605 #ifdef SCTP_PACKET_LOGGING 4606 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 4607 sctp_packet_log(o_pak); 4608 #endif 4609 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id); 4610 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4611 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4612 atomic_add_int(&stcb->asoc.refcnt, 1); 4613 SCTP_TCB_UNLOCK(stcb); 4614 SCTP_SOCKET_LOCK(so, 0); 4615 SCTP_TCB_LOCK(stcb); 4616 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4617 } 4618 #endif 4619 if (net) { 4620 /* for link local this must be done */ 4621 sin6->sin6_scope_id = prev_scope; 4622 sin6->sin6_port = prev_port; 4623 } 4624 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret); 4625 SCTP_STAT_INCR(sctps_sendpackets); 4626 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 4627 if (ret) { 4628 SCTP_STAT_INCR(sctps_senderrors); 4629 } 4630 if (net == NULL) { 4631 /* Now if we had a temp route free it */ 4632 RO_RTFREE(ro); 4633 } else { 4634 /* 4635 * PMTU check versus smallest asoc MTU goes 4636 * here 4637 */ 4638 if (ro->ro_rt == NULL) { 4639 /* Route was freed */ 4640 if (net->ro._s_addr && 4641 net->src_addr_selected) { 4642 sctp_free_ifa(net->ro._s_addr); 4643 net->ro._s_addr = NULL; 4644 } 4645 net->src_addr_selected = 0; 4646 } 4647 if ((ro->ro_rt != NULL) && 4648 (net->ro._s_addr)) { 4649 uint32_t mtu; 4650 4651 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); 4652 if (mtu && 4653 (stcb->asoc.smallest_mtu > mtu)) { 4654 sctp_mtu_size_reset(inp, &stcb->asoc, mtu); 4655 net->mtu = mtu; 4656 if (net->port) { 4657 net->mtu -= sizeof(struct udphdr); 4658 } 4659 } 4660 } else if (ifp) { 4661 if (ND_IFINFO(ifp)->linkmtu && 4662 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) { 4663 sctp_mtu_size_reset(inp, 4664 &stcb->asoc, 4665 ND_IFINFO(ifp)->linkmtu); 4666 } 4667 } 4668 } 4669 return (ret); 4670 } 4671 #endif 4672 default: 4673 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n", 4674 ((struct sockaddr *)to)->sa_family); 4675 sctp_m_freem(m); 4676 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 4677 return (EFAULT); 4678 } 4679 } 4680 4681 4682 void 4683 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked 4684 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 4685 SCTP_UNUSED 4686 #endif 4687 ) 4688 { 4689 struct mbuf *m, *m_last; 4690 struct sctp_nets *net; 4691 struct sctp_init_chunk *init; 4692 struct sctp_supported_addr_param *sup_addr; 4693 struct sctp_adaptation_layer_indication *ali; 4694 struct sctp_supported_chunk_types_param *pr_supported; 4695 struct sctp_paramhdr *ph; 4696 int cnt_inits_to = 0; 4697 int ret; 4698 uint16_t num_ext, chunk_len, padding_len, parameter_len; 4699 4700 /* INIT's always go to the primary (and usually ONLY address) */ 4701 net = stcb->asoc.primary_destination; 4702 if (net == NULL) { 4703 net = TAILQ_FIRST(&stcb->asoc.nets); 4704 if (net == NULL) { 4705 /* TSNH */ 4706 return; 4707 } 4708 /* we confirm any address we send an INIT to */ 4709 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 4710 (void)sctp_set_primary_addr(stcb, NULL, net); 4711 } else { 4712 /* we confirm any address we send an INIT to */ 4713 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 4714 } 4715 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n"); 4716 #ifdef INET6 4717 if (net->ro._l_addr.sa.sa_family == AF_INET6) { 4718 /* 4719 * special hook, if we are sending to link local it will not 4720 * show up in our private address count. 4721 */ 4722 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr)) 4723 cnt_inits_to = 1; 4724 } 4725 #endif 4726 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 4727 /* This case should not happen */ 4728 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n"); 4729 return; 4730 } 4731 /* start the INIT timer */ 4732 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net); 4733 4734 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA); 4735 if (m == NULL) { 4736 /* No memory, INIT timer will re-attempt. */ 4737 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n"); 4738 return; 4739 } 4740 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk); 4741 padding_len = 0; 4742 /* Now lets put the chunk header in place */ 4743 init = mtod(m, struct sctp_init_chunk *); 4744 /* now the chunk header */ 4745 init->ch.chunk_type = SCTP_INITIATION; 4746 init->ch.chunk_flags = 0; 4747 /* fill in later from mbuf we build */ 4748 init->ch.chunk_length = 0; 4749 /* place in my tag */ 4750 init->init.initiate_tag = htonl(stcb->asoc.my_vtag); 4751 /* set up some of the credits. */ 4752 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0, 4753 SCTP_MINIMAL_RWND)); 4754 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams); 4755 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams); 4756 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number); 4757 4758 /* Adaptation layer indication parameter */ 4759 if (inp->sctp_ep.adaptation_layer_indicator_provided) { 4760 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication); 4761 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len); 4762 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 4763 ali->ph.param_length = htons(parameter_len); 4764 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator); 4765 chunk_len += parameter_len; 4766 } 4767 /* ECN parameter */ 4768 if (stcb->asoc.ecn_supported == 1) { 4769 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4770 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4771 ph->param_type = htons(SCTP_ECN_CAPABLE); 4772 ph->param_length = htons(parameter_len); 4773 chunk_len += parameter_len; 4774 } 4775 /* PR-SCTP supported parameter */ 4776 if (stcb->asoc.prsctp_supported == 1) { 4777 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4778 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4779 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED); 4780 ph->param_length = htons(parameter_len); 4781 chunk_len += parameter_len; 4782 } 4783 /* Add NAT friendly parameter. */ 4784 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) { 4785 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4786 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4787 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); 4788 ph->param_length = htons(parameter_len); 4789 chunk_len += parameter_len; 4790 } 4791 /* And now tell the peer which extensions we support */ 4792 num_ext = 0; 4793 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len); 4794 if (stcb->asoc.prsctp_supported == 1) { 4795 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 4796 } 4797 if (stcb->asoc.auth_supported == 1) { 4798 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 4799 } 4800 if (stcb->asoc.asconf_supported == 1) { 4801 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 4802 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 4803 } 4804 if (stcb->asoc.reconfig_supported == 1) { 4805 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 4806 } 4807 if (stcb->asoc.nrsack_supported == 1) { 4808 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; 4809 } 4810 if (stcb->asoc.pktdrop_supported == 1) { 4811 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 4812 } 4813 if (num_ext > 0) { 4814 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext; 4815 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 4816 pr_supported->ph.param_length = htons(parameter_len); 4817 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4818 chunk_len += parameter_len; 4819 } 4820 /* add authentication parameters */ 4821 if (stcb->asoc.auth_supported) { 4822 /* attach RANDOM parameter, if available */ 4823 if (stcb->asoc.authinfo.random != NULL) { 4824 struct sctp_auth_random *randp; 4825 4826 if (padding_len > 0) { 4827 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4828 chunk_len += padding_len; 4829 padding_len = 0; 4830 } 4831 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len); 4832 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len; 4833 /* random key already contains the header */ 4834 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len); 4835 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4836 chunk_len += parameter_len; 4837 } 4838 /* add HMAC_ALGO parameter */ 4839 if (stcb->asoc.local_hmacs != NULL) { 4840 struct sctp_auth_hmac_algo *hmacs; 4841 4842 if (padding_len > 0) { 4843 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4844 chunk_len += padding_len; 4845 padding_len = 0; 4846 } 4847 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len); 4848 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) + 4849 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t)); 4850 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 4851 hmacs->ph.param_length = htons(parameter_len); 4852 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids); 4853 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4854 chunk_len += parameter_len; 4855 } 4856 /* add CHUNKS parameter */ 4857 if (stcb->asoc.local_auth_chunks != NULL) { 4858 struct sctp_auth_chunk_list *chunks; 4859 4860 if (padding_len > 0) { 4861 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4862 chunk_len += padding_len; 4863 padding_len = 0; 4864 } 4865 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len); 4866 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) + 4867 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks)); 4868 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 4869 chunks->ph.param_length = htons(parameter_len); 4870 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types); 4871 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4872 chunk_len += parameter_len; 4873 } 4874 } 4875 /* now any cookie time extensions */ 4876 if (stcb->asoc.cookie_preserve_req) { 4877 struct sctp_cookie_perserve_param *cookie_preserve; 4878 4879 if (padding_len > 0) { 4880 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4881 chunk_len += padding_len; 4882 padding_len = 0; 4883 } 4884 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param); 4885 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len); 4886 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE); 4887 cookie_preserve->ph.param_length = htons(parameter_len); 4888 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req); 4889 stcb->asoc.cookie_preserve_req = 0; 4890 chunk_len += parameter_len; 4891 } 4892 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) { 4893 uint8_t i; 4894 4895 if (padding_len > 0) { 4896 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4897 chunk_len += padding_len; 4898 padding_len = 0; 4899 } 4900 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4901 if (stcb->asoc.scope.ipv4_addr_legal) { 4902 parameter_len += (uint16_t) sizeof(uint16_t); 4903 } 4904 if (stcb->asoc.scope.ipv6_addr_legal) { 4905 parameter_len += (uint16_t) sizeof(uint16_t); 4906 } 4907 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len); 4908 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE); 4909 sup_addr->ph.param_length = htons(parameter_len); 4910 i = 0; 4911 if (stcb->asoc.scope.ipv4_addr_legal) { 4912 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS); 4913 } 4914 if (stcb->asoc.scope.ipv6_addr_legal) { 4915 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS); 4916 } 4917 padding_len = 4 - 2 * i; 4918 chunk_len += parameter_len; 4919 } 4920 SCTP_BUF_LEN(m) = chunk_len; 4921 /* now the addresses */ 4922 /* 4923 * To optimize this we could put the scoping stuff into a structure 4924 * and remove the individual uint8's from the assoc structure. Then 4925 * we could just sifa in the address within the stcb. But for now 4926 * this is a quick hack to get the address stuff teased apart. 4927 */ 4928 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope, 4929 m, cnt_inits_to, 4930 &padding_len, &chunk_len); 4931 4932 init->ch.chunk_length = htons(chunk_len); 4933 if (padding_len > 0) { 4934 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 4935 sctp_m_freem(m); 4936 return; 4937 } 4938 } 4939 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n"); 4940 ret = sctp_lowlevel_chunk_output(inp, stcb, net, 4941 (struct sockaddr *)&net->ro._l_addr, 4942 m, 0, NULL, 0, 0, 0, 0, 4943 inp->sctp_lport, stcb->rport, htonl(0), 4944 net->port, NULL, 4945 0, 0, 4946 so_locked); 4947 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret); 4948 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 4949 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 4950 } 4951 4952 struct mbuf * 4953 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt, 4954 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly) 4955 { 4956 /* 4957 * Given a mbuf containing an INIT or INIT-ACK with the param_offset 4958 * being equal to the beginning of the params i.e. (iphlen + 4959 * sizeof(struct sctp_init_msg) parse through the parameters to the 4960 * end of the mbuf verifying that all parameters are known. 4961 * 4962 * For unknown parameters build and return a mbuf with 4963 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop 4964 * processing this chunk stop, and set *abort_processing to 1. 4965 * 4966 * By having param_offset be pre-set to where parameters begin it is 4967 * hoped that this routine may be reused in the future by new 4968 * features. 4969 */ 4970 struct sctp_paramhdr *phdr, params; 4971 4972 struct mbuf *mat, *op_err; 4973 char tempbuf[SCTP_PARAM_BUFFER_SIZE]; 4974 int at, limit, pad_needed; 4975 uint16_t ptype, plen, padded_size; 4976 int err_at; 4977 4978 *abort_processing = 0; 4979 mat = in_initpkt; 4980 err_at = 0; 4981 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk); 4982 at = param_offset; 4983 op_err = NULL; 4984 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n"); 4985 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 4986 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) { 4987 ptype = ntohs(phdr->param_type); 4988 plen = ntohs(phdr->param_length); 4989 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) { 4990 /* wacked parameter */ 4991 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen); 4992 goto invalid_size; 4993 } 4994 limit -= SCTP_SIZE32(plen); 4995 /*- 4996 * All parameters for all chunks that we know/understand are 4997 * listed here. We process them other places and make 4998 * appropriate stop actions per the upper bits. However this 4999 * is the generic routine processor's can call to get back 5000 * an operr.. to either incorporate (init-ack) or send. 5001 */ 5002 padded_size = SCTP_SIZE32(plen); 5003 switch (ptype) { 5004 /* Param's with variable size */ 5005 case SCTP_HEARTBEAT_INFO: 5006 case SCTP_STATE_COOKIE: 5007 case SCTP_UNRECOG_PARAM: 5008 case SCTP_ERROR_CAUSE_IND: 5009 /* ok skip fwd */ 5010 at += padded_size; 5011 break; 5012 /* Param's with variable size within a range */ 5013 case SCTP_CHUNK_LIST: 5014 case SCTP_SUPPORTED_CHUNK_EXT: 5015 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) { 5016 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen); 5017 goto invalid_size; 5018 } 5019 at += padded_size; 5020 break; 5021 case SCTP_SUPPORTED_ADDRTYPE: 5022 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) { 5023 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen); 5024 goto invalid_size; 5025 } 5026 at += padded_size; 5027 break; 5028 case SCTP_RANDOM: 5029 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) { 5030 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen); 5031 goto invalid_size; 5032 } 5033 at += padded_size; 5034 break; 5035 case SCTP_SET_PRIM_ADDR: 5036 case SCTP_DEL_IP_ADDRESS: 5037 case SCTP_ADD_IP_ADDRESS: 5038 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) && 5039 (padded_size != sizeof(struct sctp_asconf_addr_param))) { 5040 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen); 5041 goto invalid_size; 5042 } 5043 at += padded_size; 5044 break; 5045 /* Param's with a fixed size */ 5046 case SCTP_IPV4_ADDRESS: 5047 if (padded_size != sizeof(struct sctp_ipv4addr_param)) { 5048 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen); 5049 goto invalid_size; 5050 } 5051 at += padded_size; 5052 break; 5053 case SCTP_IPV6_ADDRESS: 5054 if (padded_size != sizeof(struct sctp_ipv6addr_param)) { 5055 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen); 5056 goto invalid_size; 5057 } 5058 at += padded_size; 5059 break; 5060 case SCTP_COOKIE_PRESERVE: 5061 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) { 5062 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen); 5063 goto invalid_size; 5064 } 5065 at += padded_size; 5066 break; 5067 case SCTP_HAS_NAT_SUPPORT: 5068 *nat_friendly = 1; 5069 /* fall through */ 5070 case SCTP_PRSCTP_SUPPORTED: 5071 if (padded_size != sizeof(struct sctp_paramhdr)) { 5072 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen); 5073 goto invalid_size; 5074 } 5075 at += padded_size; 5076 break; 5077 case SCTP_ECN_CAPABLE: 5078 if (padded_size != sizeof(struct sctp_paramhdr)) { 5079 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen); 5080 goto invalid_size; 5081 } 5082 at += padded_size; 5083 break; 5084 case SCTP_ULP_ADAPTATION: 5085 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) { 5086 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen); 5087 goto invalid_size; 5088 } 5089 at += padded_size; 5090 break; 5091 case SCTP_SUCCESS_REPORT: 5092 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) { 5093 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen); 5094 goto invalid_size; 5095 } 5096 at += padded_size; 5097 break; 5098 case SCTP_HOSTNAME_ADDRESS: 5099 { 5100 /* We can NOT handle HOST NAME addresses!! */ 5101 int l_len; 5102 5103 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n"); 5104 *abort_processing = 1; 5105 if (op_err == NULL) { 5106 /* Ok need to try to get a mbuf */ 5107 #ifdef INET6 5108 l_len = SCTP_MIN_OVERHEAD; 5109 #else 5110 l_len = SCTP_MIN_V4_OVERHEAD; 5111 #endif 5112 l_len += sizeof(struct sctp_chunkhdr); 5113 l_len += plen; 5114 l_len += sizeof(struct sctp_paramhdr); 5115 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5116 if (op_err) { 5117 SCTP_BUF_LEN(op_err) = 0; 5118 /* 5119 * pre-reserve space for ip 5120 * and sctp header and 5121 * chunk hdr 5122 */ 5123 #ifdef INET6 5124 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5125 #else 5126 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5127 #endif 5128 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5129 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5130 } 5131 } 5132 if (op_err) { 5133 /* If we have space */ 5134 struct sctp_paramhdr s; 5135 5136 if (err_at % 4) { 5137 uint32_t cpthis = 0; 5138 5139 pad_needed = 4 - (err_at % 4); 5140 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5141 err_at += pad_needed; 5142 } 5143 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR); 5144 s.param_length = htons(sizeof(s) + plen); 5145 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5146 err_at += sizeof(s); 5147 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen)); 5148 if (phdr == NULL) { 5149 sctp_m_freem(op_err); 5150 /* 5151 * we are out of memory but 5152 * we still need to have a 5153 * look at what to do (the 5154 * system is in trouble 5155 * though). 5156 */ 5157 return (NULL); 5158 } 5159 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 5160 } 5161 return (op_err); 5162 break; 5163 } 5164 default: 5165 /* 5166 * we do not recognize the parameter figure out what 5167 * we do. 5168 */ 5169 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype); 5170 if ((ptype & 0x4000) == 0x4000) { 5171 /* Report bit is set?? */ 5172 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n"); 5173 if (op_err == NULL) { 5174 int l_len; 5175 5176 /* Ok need to try to get an mbuf */ 5177 #ifdef INET6 5178 l_len = SCTP_MIN_OVERHEAD; 5179 #else 5180 l_len = SCTP_MIN_V4_OVERHEAD; 5181 #endif 5182 l_len += sizeof(struct sctp_chunkhdr); 5183 l_len += plen; 5184 l_len += sizeof(struct sctp_paramhdr); 5185 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5186 if (op_err) { 5187 SCTP_BUF_LEN(op_err) = 0; 5188 #ifdef INET6 5189 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5190 #else 5191 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5192 #endif 5193 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5194 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5195 } 5196 } 5197 if (op_err) { 5198 /* If we have space */ 5199 struct sctp_paramhdr s; 5200 5201 if (err_at % 4) { 5202 uint32_t cpthis = 0; 5203 5204 pad_needed = 4 - (err_at % 4); 5205 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5206 err_at += pad_needed; 5207 } 5208 s.param_type = htons(SCTP_UNRECOG_PARAM); 5209 s.param_length = htons(sizeof(s) + plen); 5210 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5211 err_at += sizeof(s); 5212 if (plen > sizeof(tempbuf)) { 5213 plen = sizeof(tempbuf); 5214 } 5215 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen)); 5216 if (phdr == NULL) { 5217 sctp_m_freem(op_err); 5218 /* 5219 * we are out of memory but 5220 * we still need to have a 5221 * look at what to do (the 5222 * system is in trouble 5223 * though). 5224 */ 5225 op_err = NULL; 5226 goto more_processing; 5227 } 5228 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 5229 err_at += plen; 5230 } 5231 } 5232 more_processing: 5233 if ((ptype & 0x8000) == 0x0000) { 5234 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n"); 5235 return (op_err); 5236 } else { 5237 /* skip this chunk and continue processing */ 5238 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n"); 5239 at += SCTP_SIZE32(plen); 5240 } 5241 break; 5242 5243 } 5244 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 5245 } 5246 return (op_err); 5247 invalid_size: 5248 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n"); 5249 *abort_processing = 1; 5250 if ((op_err == NULL) && phdr) { 5251 int l_len; 5252 5253 #ifdef INET6 5254 l_len = SCTP_MIN_OVERHEAD; 5255 #else 5256 l_len = SCTP_MIN_V4_OVERHEAD; 5257 #endif 5258 l_len += sizeof(struct sctp_chunkhdr); 5259 l_len += (2 * sizeof(struct sctp_paramhdr)); 5260 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5261 if (op_err) { 5262 SCTP_BUF_LEN(op_err) = 0; 5263 #ifdef INET6 5264 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5265 #else 5266 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5267 #endif 5268 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5269 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5270 } 5271 } 5272 if ((op_err) && phdr) { 5273 struct sctp_paramhdr s; 5274 5275 if (err_at % 4) { 5276 uint32_t cpthis = 0; 5277 5278 pad_needed = 4 - (err_at % 4); 5279 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5280 err_at += pad_needed; 5281 } 5282 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); 5283 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr)); 5284 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5285 err_at += sizeof(s); 5286 /* Only copy back the p-hdr that caused the issue */ 5287 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr); 5288 } 5289 return (op_err); 5290 } 5291 5292 static int 5293 sctp_are_there_new_addresses(struct sctp_association *asoc, 5294 struct mbuf *in_initpkt, int offset, struct sockaddr *src) 5295 { 5296 /* 5297 * Given a INIT packet, look through the packet to verify that there 5298 * are NO new addresses. As we go through the parameters add reports 5299 * of any un-understood parameters that require an error. Also we 5300 * must return (1) to drop the packet if we see a un-understood 5301 * parameter that tells us to drop the chunk. 5302 */ 5303 struct sockaddr *sa_touse; 5304 struct sockaddr *sa; 5305 struct sctp_paramhdr *phdr, params; 5306 uint16_t ptype, plen; 5307 uint8_t fnd; 5308 struct sctp_nets *net; 5309 5310 #ifdef INET 5311 struct sockaddr_in sin4, *sa4; 5312 5313 #endif 5314 #ifdef INET6 5315 struct sockaddr_in6 sin6, *sa6; 5316 5317 #endif 5318 5319 #ifdef INET 5320 memset(&sin4, 0, sizeof(sin4)); 5321 sin4.sin_family = AF_INET; 5322 sin4.sin_len = sizeof(sin4); 5323 #endif 5324 #ifdef INET6 5325 memset(&sin6, 0, sizeof(sin6)); 5326 sin6.sin6_family = AF_INET6; 5327 sin6.sin6_len = sizeof(sin6); 5328 #endif 5329 /* First what about the src address of the pkt ? */ 5330 fnd = 0; 5331 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5332 sa = (struct sockaddr *)&net->ro._l_addr; 5333 if (sa->sa_family == src->sa_family) { 5334 #ifdef INET 5335 if (sa->sa_family == AF_INET) { 5336 struct sockaddr_in *src4; 5337 5338 sa4 = (struct sockaddr_in *)sa; 5339 src4 = (struct sockaddr_in *)src; 5340 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) { 5341 fnd = 1; 5342 break; 5343 } 5344 } 5345 #endif 5346 #ifdef INET6 5347 if (sa->sa_family == AF_INET6) { 5348 struct sockaddr_in6 *src6; 5349 5350 sa6 = (struct sockaddr_in6 *)sa; 5351 src6 = (struct sockaddr_in6 *)src; 5352 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) { 5353 fnd = 1; 5354 break; 5355 } 5356 } 5357 #endif 5358 } 5359 } 5360 if (fnd == 0) { 5361 /* New address added! no need to look futher. */ 5362 return (1); 5363 } 5364 /* Ok so far lets munge through the rest of the packet */ 5365 offset += sizeof(struct sctp_init_chunk); 5366 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); 5367 while (phdr) { 5368 sa_touse = NULL; 5369 ptype = ntohs(phdr->param_type); 5370 plen = ntohs(phdr->param_length); 5371 switch (ptype) { 5372 #ifdef INET 5373 case SCTP_IPV4_ADDRESS: 5374 { 5375 struct sctp_ipv4addr_param *p4, p4_buf; 5376 5377 phdr = sctp_get_next_param(in_initpkt, offset, 5378 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 5379 if (plen != sizeof(struct sctp_ipv4addr_param) || 5380 phdr == NULL) { 5381 return (1); 5382 } 5383 p4 = (struct sctp_ipv4addr_param *)phdr; 5384 sin4.sin_addr.s_addr = p4->addr; 5385 sa_touse = (struct sockaddr *)&sin4; 5386 break; 5387 } 5388 #endif 5389 #ifdef INET6 5390 case SCTP_IPV6_ADDRESS: 5391 { 5392 struct sctp_ipv6addr_param *p6, p6_buf; 5393 5394 phdr = sctp_get_next_param(in_initpkt, offset, 5395 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 5396 if (plen != sizeof(struct sctp_ipv6addr_param) || 5397 phdr == NULL) { 5398 return (1); 5399 } 5400 p6 = (struct sctp_ipv6addr_param *)phdr; 5401 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 5402 sizeof(p6->addr)); 5403 sa_touse = (struct sockaddr *)&sin6; 5404 break; 5405 } 5406 #endif 5407 default: 5408 sa_touse = NULL; 5409 break; 5410 } 5411 if (sa_touse) { 5412 /* ok, sa_touse points to one to check */ 5413 fnd = 0; 5414 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5415 sa = (struct sockaddr *)&net->ro._l_addr; 5416 if (sa->sa_family != sa_touse->sa_family) { 5417 continue; 5418 } 5419 #ifdef INET 5420 if (sa->sa_family == AF_INET) { 5421 sa4 = (struct sockaddr_in *)sa; 5422 if (sa4->sin_addr.s_addr == 5423 sin4.sin_addr.s_addr) { 5424 fnd = 1; 5425 break; 5426 } 5427 } 5428 #endif 5429 #ifdef INET6 5430 if (sa->sa_family == AF_INET6) { 5431 sa6 = (struct sockaddr_in6 *)sa; 5432 if (SCTP6_ARE_ADDR_EQUAL( 5433 sa6, &sin6)) { 5434 fnd = 1; 5435 break; 5436 } 5437 } 5438 #endif 5439 } 5440 if (!fnd) { 5441 /* New addr added! no need to look further */ 5442 return (1); 5443 } 5444 } 5445 offset += SCTP_SIZE32(plen); 5446 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); 5447 } 5448 return (0); 5449 } 5450 5451 /* 5452 * Given a MBUF chain that was sent into us containing an INIT. Build a 5453 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done 5454 * a pullup to include IPv6/4header, SCTP header and initial part of INIT 5455 * message (i.e. the struct sctp_init_msg). 5456 */ 5457 void 5458 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 5459 struct mbuf *init_pkt, int iphlen, int offset, 5460 struct sockaddr *src, struct sockaddr *dst, 5461 struct sctphdr *sh, struct sctp_init_chunk *init_chk, 5462 uint8_t mflowtype, uint32_t mflowid, 5463 uint32_t vrf_id, uint16_t port, int hold_inp_lock) 5464 { 5465 struct sctp_association *asoc; 5466 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err; 5467 struct sctp_init_ack_chunk *initack; 5468 struct sctp_adaptation_layer_indication *ali; 5469 struct sctp_supported_chunk_types_param *pr_supported; 5470 struct sctp_paramhdr *ph; 5471 union sctp_sockstore *over_addr; 5472 struct sctp_scoping scp; 5473 5474 #ifdef INET 5475 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst; 5476 struct sockaddr_in *src4 = (struct sockaddr_in *)src; 5477 struct sockaddr_in *sin; 5478 5479 #endif 5480 #ifdef INET6 5481 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst; 5482 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src; 5483 struct sockaddr_in6 *sin6; 5484 5485 #endif 5486 struct sockaddr *to; 5487 struct sctp_state_cookie stc; 5488 struct sctp_nets *net = NULL; 5489 uint8_t *signature = NULL; 5490 int cnt_inits_to = 0; 5491 uint16_t his_limit, i_want; 5492 int abort_flag; 5493 int nat_friendly = 0; 5494 struct socket *so; 5495 uint16_t num_ext, chunk_len, padding_len, parameter_len; 5496 5497 if (stcb) { 5498 asoc = &stcb->asoc; 5499 } else { 5500 asoc = NULL; 5501 } 5502 if ((asoc != NULL) && 5503 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 5504 (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) { 5505 /* new addresses, out of here in non-cookie-wait states */ 5506 /* 5507 * Send a ABORT, we don't add the new address error clause 5508 * though we even set the T bit and copy in the 0 tag.. this 5509 * looks no different than if no listener was present. 5510 */ 5511 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 5512 "Address added"); 5513 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err, 5514 mflowtype, mflowid, inp->fibnum, 5515 vrf_id, port); 5516 return; 5517 } 5518 abort_flag = 0; 5519 op_err = sctp_arethere_unrecognized_parameters(init_pkt, 5520 (offset + sizeof(struct sctp_init_chunk)), 5521 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly); 5522 if (abort_flag) { 5523 do_a_abort: 5524 if (op_err == NULL) { 5525 char msg[SCTP_DIAG_INFO_LEN]; 5526 5527 snprintf(msg, sizeof(msg), "%s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__); 5528 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 5529 msg); 5530 } 5531 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 5532 init_chk->init.initiate_tag, op_err, 5533 mflowtype, mflowid, inp->fibnum, 5534 vrf_id, port); 5535 return; 5536 } 5537 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 5538 if (m == NULL) { 5539 /* No memory, INIT timer will re-attempt. */ 5540 if (op_err) 5541 sctp_m_freem(op_err); 5542 return; 5543 } 5544 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk); 5545 padding_len = 0; 5546 5547 /* 5548 * We might not overwrite the identification[] completely and on 5549 * some platforms time_entered will contain some padding. Therefore 5550 * zero out the cookie to avoid putting uninitialized memory on the 5551 * wire. 5552 */ 5553 memset(&stc, 0, sizeof(struct sctp_state_cookie)); 5554 5555 /* the time I built cookie */ 5556 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered); 5557 5558 /* populate any tie tags */ 5559 if (asoc != NULL) { 5560 /* unlock before tag selections */ 5561 stc.tie_tag_my_vtag = asoc->my_vtag_nonce; 5562 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce; 5563 stc.cookie_life = asoc->cookie_life; 5564 net = asoc->primary_destination; 5565 } else { 5566 stc.tie_tag_my_vtag = 0; 5567 stc.tie_tag_peer_vtag = 0; 5568 /* life I will award this cookie */ 5569 stc.cookie_life = inp->sctp_ep.def_cookie_life; 5570 } 5571 5572 /* copy in the ports for later check */ 5573 stc.myport = sh->dest_port; 5574 stc.peerport = sh->src_port; 5575 5576 /* 5577 * If we wanted to honor cookie life extentions, we would add to 5578 * stc.cookie_life. For now we should NOT honor any extension 5579 */ 5580 stc.site_scope = stc.local_scope = stc.loopback_scope = 0; 5581 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 5582 stc.ipv6_addr_legal = 1; 5583 if (SCTP_IPV6_V6ONLY(inp)) { 5584 stc.ipv4_addr_legal = 0; 5585 } else { 5586 stc.ipv4_addr_legal = 1; 5587 } 5588 } else { 5589 stc.ipv6_addr_legal = 0; 5590 stc.ipv4_addr_legal = 1; 5591 } 5592 stc.ipv4_scope = 0; 5593 if (net == NULL) { 5594 to = src; 5595 switch (dst->sa_family) { 5596 #ifdef INET 5597 case AF_INET: 5598 { 5599 /* lookup address */ 5600 stc.address[0] = src4->sin_addr.s_addr; 5601 stc.address[1] = 0; 5602 stc.address[2] = 0; 5603 stc.address[3] = 0; 5604 stc.addr_type = SCTP_IPV4_ADDRESS; 5605 /* local from address */ 5606 stc.laddress[0] = dst4->sin_addr.s_addr; 5607 stc.laddress[1] = 0; 5608 stc.laddress[2] = 0; 5609 stc.laddress[3] = 0; 5610 stc.laddr_type = SCTP_IPV4_ADDRESS; 5611 /* scope_id is only for v6 */ 5612 stc.scope_id = 0; 5613 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) || 5614 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) { 5615 stc.ipv4_scope = 1; 5616 } 5617 /* Must use the address in this case */ 5618 if (sctp_is_address_on_local_host(src, vrf_id)) { 5619 stc.loopback_scope = 1; 5620 stc.ipv4_scope = 1; 5621 stc.site_scope = 1; 5622 stc.local_scope = 0; 5623 } 5624 break; 5625 } 5626 #endif 5627 #ifdef INET6 5628 case AF_INET6: 5629 { 5630 stc.addr_type = SCTP_IPV6_ADDRESS; 5631 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr)); 5632 stc.scope_id = in6_getscope(&src6->sin6_addr); 5633 if (sctp_is_address_on_local_host(src, vrf_id)) { 5634 stc.loopback_scope = 1; 5635 stc.local_scope = 0; 5636 stc.site_scope = 1; 5637 stc.ipv4_scope = 1; 5638 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) || 5639 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) { 5640 /* 5641 * If the new destination or source 5642 * is a LINK_LOCAL we must have 5643 * common both site and local scope. 5644 * Don't set local scope though 5645 * since we must depend on the 5646 * source to be added implicitly. We 5647 * cannot assure just because we 5648 * share one link that all links are 5649 * common. 5650 */ 5651 stc.local_scope = 0; 5652 stc.site_scope = 1; 5653 stc.ipv4_scope = 1; 5654 /* 5655 * we start counting for the private 5656 * address stuff at 1. since the 5657 * link local we source from won't 5658 * show up in our scoped count. 5659 */ 5660 cnt_inits_to = 1; 5661 /* 5662 * pull out the scope_id from 5663 * incoming pkt 5664 */ 5665 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) || 5666 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) { 5667 /* 5668 * If the new destination or source 5669 * is SITE_LOCAL then we must have 5670 * site scope in common. 5671 */ 5672 stc.site_scope = 1; 5673 } 5674 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr)); 5675 stc.laddr_type = SCTP_IPV6_ADDRESS; 5676 break; 5677 } 5678 #endif 5679 default: 5680 /* TSNH */ 5681 goto do_a_abort; 5682 break; 5683 } 5684 } else { 5685 /* set the scope per the existing tcb */ 5686 5687 #ifdef INET6 5688 struct sctp_nets *lnet; 5689 5690 #endif 5691 5692 stc.loopback_scope = asoc->scope.loopback_scope; 5693 stc.ipv4_scope = asoc->scope.ipv4_local_scope; 5694 stc.site_scope = asoc->scope.site_scope; 5695 stc.local_scope = asoc->scope.local_scope; 5696 #ifdef INET6 5697 /* Why do we not consider IPv4 LL addresses? */ 5698 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { 5699 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) { 5700 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) { 5701 /* 5702 * if we have a LL address, start 5703 * counting at 1. 5704 */ 5705 cnt_inits_to = 1; 5706 } 5707 } 5708 } 5709 #endif 5710 /* use the net pointer */ 5711 to = (struct sockaddr *)&net->ro._l_addr; 5712 switch (to->sa_family) { 5713 #ifdef INET 5714 case AF_INET: 5715 sin = (struct sockaddr_in *)to; 5716 stc.address[0] = sin->sin_addr.s_addr; 5717 stc.address[1] = 0; 5718 stc.address[2] = 0; 5719 stc.address[3] = 0; 5720 stc.addr_type = SCTP_IPV4_ADDRESS; 5721 if (net->src_addr_selected == 0) { 5722 /* 5723 * strange case here, the INIT should have 5724 * did the selection. 5725 */ 5726 net->ro._s_addr = sctp_source_address_selection(inp, 5727 stcb, (sctp_route_t *) & net->ro, 5728 net, 0, vrf_id); 5729 if (net->ro._s_addr == NULL) 5730 return; 5731 5732 net->src_addr_selected = 1; 5733 5734 } 5735 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr; 5736 stc.laddress[1] = 0; 5737 stc.laddress[2] = 0; 5738 stc.laddress[3] = 0; 5739 stc.laddr_type = SCTP_IPV4_ADDRESS; 5740 /* scope_id is only for v6 */ 5741 stc.scope_id = 0; 5742 break; 5743 #endif 5744 #ifdef INET6 5745 case AF_INET6: 5746 sin6 = (struct sockaddr_in6 *)to; 5747 memcpy(&stc.address, &sin6->sin6_addr, 5748 sizeof(struct in6_addr)); 5749 stc.addr_type = SCTP_IPV6_ADDRESS; 5750 stc.scope_id = sin6->sin6_scope_id; 5751 if (net->src_addr_selected == 0) { 5752 /* 5753 * strange case here, the INIT should have 5754 * done the selection. 5755 */ 5756 net->ro._s_addr = sctp_source_address_selection(inp, 5757 stcb, (sctp_route_t *) & net->ro, 5758 net, 0, vrf_id); 5759 if (net->ro._s_addr == NULL) 5760 return; 5761 5762 net->src_addr_selected = 1; 5763 } 5764 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr, 5765 sizeof(struct in6_addr)); 5766 stc.laddr_type = SCTP_IPV6_ADDRESS; 5767 break; 5768 #endif 5769 } 5770 } 5771 /* Now lets put the SCTP header in place */ 5772 initack = mtod(m, struct sctp_init_ack_chunk *); 5773 /* Save it off for quick ref */ 5774 stc.peers_vtag = init_chk->init.initiate_tag; 5775 /* who are we */ 5776 memcpy(stc.identification, SCTP_VERSION_STRING, 5777 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification))); 5778 memset(stc.reserved, 0, SCTP_RESERVE_SPACE); 5779 /* now the chunk header */ 5780 initack->ch.chunk_type = SCTP_INITIATION_ACK; 5781 initack->ch.chunk_flags = 0; 5782 /* fill in later from mbuf we build */ 5783 initack->ch.chunk_length = 0; 5784 /* place in my tag */ 5785 if ((asoc != NULL) && 5786 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 5787 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) || 5788 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) { 5789 /* re-use the v-tags and init-seq here */ 5790 initack->init.initiate_tag = htonl(asoc->my_vtag); 5791 initack->init.initial_tsn = htonl(asoc->init_seq_number); 5792 } else { 5793 uint32_t vtag, itsn; 5794 5795 if (hold_inp_lock) { 5796 SCTP_INP_INCR_REF(inp); 5797 SCTP_INP_RUNLOCK(inp); 5798 } 5799 if (asoc) { 5800 atomic_add_int(&asoc->refcnt, 1); 5801 SCTP_TCB_UNLOCK(stcb); 5802 new_tag: 5803 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); 5804 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) { 5805 /* 5806 * Got a duplicate vtag on some guy behind a 5807 * nat make sure we don't use it. 5808 */ 5809 goto new_tag; 5810 } 5811 initack->init.initiate_tag = htonl(vtag); 5812 /* get a TSN to use too */ 5813 itsn = sctp_select_initial_TSN(&inp->sctp_ep); 5814 initack->init.initial_tsn = htonl(itsn); 5815 SCTP_TCB_LOCK(stcb); 5816 atomic_add_int(&asoc->refcnt, -1); 5817 } else { 5818 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); 5819 initack->init.initiate_tag = htonl(vtag); 5820 /* get a TSN to use too */ 5821 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep)); 5822 } 5823 if (hold_inp_lock) { 5824 SCTP_INP_RLOCK(inp); 5825 SCTP_INP_DECR_REF(inp); 5826 } 5827 } 5828 /* save away my tag to */ 5829 stc.my_vtag = initack->init.initiate_tag; 5830 5831 /* set up some of the credits. */ 5832 so = inp->sctp_socket; 5833 if (so == NULL) { 5834 /* memory problem */ 5835 sctp_m_freem(m); 5836 return; 5837 } else { 5838 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND)); 5839 } 5840 /* set what I want */ 5841 his_limit = ntohs(init_chk->init.num_inbound_streams); 5842 /* choose what I want */ 5843 if (asoc != NULL) { 5844 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) { 5845 i_want = asoc->streamoutcnt; 5846 } else { 5847 i_want = inp->sctp_ep.pre_open_stream_count; 5848 } 5849 } else { 5850 i_want = inp->sctp_ep.pre_open_stream_count; 5851 } 5852 if (his_limit < i_want) { 5853 /* I Want more :< */ 5854 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams; 5855 } else { 5856 /* I can have what I want :> */ 5857 initack->init.num_outbound_streams = htons(i_want); 5858 } 5859 /* tell him his limit. */ 5860 initack->init.num_inbound_streams = 5861 htons(inp->sctp_ep.max_open_streams_intome); 5862 5863 /* adaptation layer indication parameter */ 5864 if (inp->sctp_ep.adaptation_layer_indicator_provided) { 5865 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication); 5866 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len); 5867 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 5868 ali->ph.param_length = htons(parameter_len); 5869 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator); 5870 chunk_len += parameter_len; 5871 } 5872 /* ECN parameter */ 5873 if (((asoc != NULL) && (asoc->ecn_supported == 1)) || 5874 ((asoc == NULL) && (inp->ecn_supported == 1))) { 5875 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5876 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5877 ph->param_type = htons(SCTP_ECN_CAPABLE); 5878 ph->param_length = htons(parameter_len); 5879 chunk_len += parameter_len; 5880 } 5881 /* PR-SCTP supported parameter */ 5882 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) || 5883 ((asoc == NULL) && (inp->prsctp_supported == 1))) { 5884 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5885 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5886 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED); 5887 ph->param_length = htons(parameter_len); 5888 chunk_len += parameter_len; 5889 } 5890 /* Add NAT friendly parameter */ 5891 if (nat_friendly) { 5892 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5893 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5894 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); 5895 ph->param_length = htons(parameter_len); 5896 chunk_len += parameter_len; 5897 } 5898 /* And now tell the peer which extensions we support */ 5899 num_ext = 0; 5900 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len); 5901 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) || 5902 ((asoc == NULL) && (inp->prsctp_supported == 1))) { 5903 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 5904 } 5905 if (((asoc != NULL) && (asoc->auth_supported == 1)) || 5906 ((asoc == NULL) && (inp->auth_supported == 1))) { 5907 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 5908 } 5909 if (((asoc != NULL) && (asoc->asconf_supported == 1)) || 5910 ((asoc == NULL) && (inp->asconf_supported == 1))) { 5911 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 5912 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 5913 } 5914 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) || 5915 ((asoc == NULL) && (inp->reconfig_supported == 1))) { 5916 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 5917 } 5918 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) || 5919 ((asoc == NULL) && (inp->nrsack_supported == 1))) { 5920 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; 5921 } 5922 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) || 5923 ((asoc == NULL) && (inp->pktdrop_supported == 1))) { 5924 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 5925 } 5926 if (num_ext > 0) { 5927 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext; 5928 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 5929 pr_supported->ph.param_length = htons(parameter_len); 5930 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5931 chunk_len += parameter_len; 5932 } 5933 /* add authentication parameters */ 5934 if (((asoc != NULL) && (asoc->auth_supported == 1)) || 5935 ((asoc == NULL) && (inp->auth_supported == 1))) { 5936 struct sctp_auth_random *randp; 5937 struct sctp_auth_hmac_algo *hmacs; 5938 struct sctp_auth_chunk_list *chunks; 5939 5940 if (padding_len > 0) { 5941 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 5942 chunk_len += padding_len; 5943 padding_len = 0; 5944 } 5945 /* generate and add RANDOM parameter */ 5946 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len); 5947 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + 5948 SCTP_AUTH_RANDOM_SIZE_DEFAULT; 5949 randp->ph.param_type = htons(SCTP_RANDOM); 5950 randp->ph.param_length = htons(parameter_len); 5951 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT); 5952 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5953 chunk_len += parameter_len; 5954 5955 if (padding_len > 0) { 5956 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 5957 chunk_len += padding_len; 5958 padding_len = 0; 5959 } 5960 /* add HMAC_ALGO parameter */ 5961 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len); 5962 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) + 5963 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs, 5964 (uint8_t *) hmacs->hmac_ids); 5965 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 5966 hmacs->ph.param_length = htons(parameter_len); 5967 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5968 chunk_len += parameter_len; 5969 5970 if (padding_len > 0) { 5971 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 5972 chunk_len += padding_len; 5973 padding_len = 0; 5974 } 5975 /* add CHUNKS parameter */ 5976 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len); 5977 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) + 5978 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks, 5979 chunks->chunk_types); 5980 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 5981 chunks->ph.param_length = htons(parameter_len); 5982 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5983 chunk_len += parameter_len; 5984 } 5985 SCTP_BUF_LEN(m) = chunk_len; 5986 m_last = m; 5987 /* now the addresses */ 5988 /* 5989 * To optimize this we could put the scoping stuff into a structure 5990 * and remove the individual uint8's from the stc structure. Then we 5991 * could just sifa in the address within the stc.. but for now this 5992 * is a quick hack to get the address stuff teased apart. 5993 */ 5994 scp.ipv4_addr_legal = stc.ipv4_addr_legal; 5995 scp.ipv6_addr_legal = stc.ipv6_addr_legal; 5996 scp.loopback_scope = stc.loopback_scope; 5997 scp.ipv4_local_scope = stc.ipv4_scope; 5998 scp.local_scope = stc.local_scope; 5999 scp.site_scope = stc.site_scope; 6000 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last, 6001 cnt_inits_to, 6002 &padding_len, &chunk_len); 6003 /* padding_len can only be positive, if no addresses have been added */ 6004 if (padding_len > 0) { 6005 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 6006 chunk_len += padding_len; 6007 SCTP_BUF_LEN(m) += padding_len; 6008 padding_len = 0; 6009 } 6010 /* tack on the operational error if present */ 6011 if (op_err) { 6012 parameter_len = 0; 6013 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 6014 parameter_len += SCTP_BUF_LEN(m_tmp); 6015 } 6016 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6017 SCTP_BUF_NEXT(m_last) = op_err; 6018 while (SCTP_BUF_NEXT(m_last) != NULL) { 6019 m_last = SCTP_BUF_NEXT(m_last); 6020 } 6021 chunk_len += parameter_len; 6022 } 6023 if (padding_len > 0) { 6024 m_last = sctp_add_pad_tombuf(m_last, padding_len); 6025 if (m_last == NULL) { 6026 /* Houston we have a problem, no space */ 6027 sctp_m_freem(m); 6028 return; 6029 } 6030 chunk_len += padding_len; 6031 padding_len = 0; 6032 } 6033 /* Now we must build a cookie */ 6034 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature); 6035 if (m_cookie == NULL) { 6036 /* memory problem */ 6037 sctp_m_freem(m); 6038 return; 6039 } 6040 /* Now append the cookie to the end and update the space/size */ 6041 SCTP_BUF_NEXT(m_last) = m_cookie; 6042 parameter_len = 0; 6043 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 6044 parameter_len += SCTP_BUF_LEN(m_tmp); 6045 if (SCTP_BUF_NEXT(m_tmp) == NULL) { 6046 m_last = m_tmp; 6047 } 6048 } 6049 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6050 chunk_len += parameter_len; 6051 6052 /* 6053 * Place in the size, but we don't include the last pad (if any) in 6054 * the INIT-ACK. 6055 */ 6056 initack->ch.chunk_length = htons(chunk_len); 6057 6058 /* 6059 * Time to sign the cookie, we don't sign over the cookie signature 6060 * though thus we set trailer. 6061 */ 6062 (void)sctp_hmac_m(SCTP_HMAC, 6063 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)], 6064 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr), 6065 (uint8_t *) signature, SCTP_SIGNATURE_SIZE); 6066 /* 6067 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return 6068 * here since the timer will drive a retranmission. 6069 */ 6070 if (padding_len > 0) { 6071 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 6072 sctp_m_freem(m); 6073 return; 6074 } 6075 } 6076 if (stc.loopback_scope) { 6077 over_addr = (union sctp_sockstore *)dst; 6078 } else { 6079 over_addr = NULL; 6080 } 6081 6082 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0, 6083 0, 0, 6084 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag, 6085 port, over_addr, 6086 mflowtype, mflowid, 6087 SCTP_SO_NOT_LOCKED); 6088 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 6089 } 6090 6091 6092 static void 6093 sctp_prune_prsctp(struct sctp_tcb *stcb, 6094 struct sctp_association *asoc, 6095 struct sctp_sndrcvinfo *srcv, 6096 int dataout) 6097 { 6098 int freed_spc = 0; 6099 struct sctp_tmit_chunk *chk, *nchk; 6100 6101 SCTP_TCB_LOCK_ASSERT(stcb); 6102 if ((asoc->prsctp_supported) && 6103 (asoc->sent_queue_cnt_removeable > 0)) { 6104 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 6105 /* 6106 * Look for chunks marked with the PR_SCTP flag AND 6107 * the buffer space flag. If the one being sent is 6108 * equal or greater priority then purge the old one 6109 * and free some space. 6110 */ 6111 if (PR_SCTP_BUF_ENABLED(chk->flags)) { 6112 /* 6113 * This one is PR-SCTP AND buffer space 6114 * limited type 6115 */ 6116 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 6117 /* 6118 * Lower numbers equates to higher 6119 * priority so if the one we are 6120 * looking at has a larger or equal 6121 * priority we want to drop the data 6122 * and NOT retransmit it. 6123 */ 6124 if (chk->data) { 6125 /* 6126 * We release the book_size 6127 * if the mbuf is here 6128 */ 6129 int ret_spc; 6130 uint8_t sent; 6131 6132 if (chk->sent > SCTP_DATAGRAM_UNSENT) 6133 sent = 1; 6134 else 6135 sent = 0; 6136 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 6137 sent, 6138 SCTP_SO_LOCKED); 6139 freed_spc += ret_spc; 6140 if (freed_spc >= dataout) { 6141 return; 6142 } 6143 } /* if chunk was present */ 6144 } /* if of sufficent priority */ 6145 } /* if chunk has enabled */ 6146 } /* tailqforeach */ 6147 6148 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 6149 /* Here we must move to the sent queue and mark */ 6150 if (PR_SCTP_BUF_ENABLED(chk->flags)) { 6151 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 6152 if (chk->data) { 6153 /* 6154 * We release the book_size 6155 * if the mbuf is here 6156 */ 6157 int ret_spc; 6158 6159 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 6160 0, SCTP_SO_LOCKED); 6161 6162 freed_spc += ret_spc; 6163 if (freed_spc >= dataout) { 6164 return; 6165 } 6166 } /* end if chk->data */ 6167 } /* end if right class */ 6168 } /* end if chk pr-sctp */ 6169 } /* tailqforeachsafe (chk) */ 6170 } /* if enabled in asoc */ 6171 } 6172 6173 int 6174 sctp_get_frag_point(struct sctp_tcb *stcb, 6175 struct sctp_association *asoc) 6176 { 6177 int siz, ovh; 6178 6179 /* 6180 * For endpoints that have both v6 and v4 addresses we must reserve 6181 * room for the ipv6 header, for those that are only dealing with V4 6182 * we use a larger frag point. 6183 */ 6184 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 6185 ovh = SCTP_MED_OVERHEAD; 6186 } else { 6187 ovh = SCTP_MED_V4_OVERHEAD; 6188 } 6189 6190 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu) 6191 siz = asoc->smallest_mtu - ovh; 6192 else 6193 siz = (stcb->asoc.sctp_frag_point - ovh); 6194 /* 6195 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) { 6196 */ 6197 /* A data chunk MUST fit in a cluster */ 6198 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */ 6199 /* } */ 6200 6201 /* adjust for an AUTH chunk if DATA requires auth */ 6202 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) 6203 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 6204 6205 if (siz % 4) { 6206 /* make it an even word boundary please */ 6207 siz -= (siz % 4); 6208 } 6209 return (siz); 6210 } 6211 6212 static void 6213 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp) 6214 { 6215 /* 6216 * We assume that the user wants PR_SCTP_TTL if the user provides a 6217 * positive lifetime but does not specify any PR_SCTP policy. 6218 */ 6219 if (PR_SCTP_ENABLED(sp->sinfo_flags)) { 6220 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); 6221 } else if (sp->timetolive > 0) { 6222 sp->sinfo_flags |= SCTP_PR_SCTP_TTL; 6223 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); 6224 } else { 6225 return; 6226 } 6227 switch (PR_SCTP_POLICY(sp->sinfo_flags)) { 6228 case CHUNK_FLAGS_PR_SCTP_BUF: 6229 /* 6230 * Time to live is a priority stored in tv_sec when doing 6231 * the buffer drop thing. 6232 */ 6233 sp->ts.tv_sec = sp->timetolive; 6234 sp->ts.tv_usec = 0; 6235 break; 6236 case CHUNK_FLAGS_PR_SCTP_TTL: 6237 { 6238 struct timeval tv; 6239 6240 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 6241 tv.tv_sec = sp->timetolive / 1000; 6242 tv.tv_usec = (sp->timetolive * 1000) % 1000000; 6243 /* 6244 * TODO sctp_constants.h needs alternative time 6245 * macros when _KERNEL is undefined. 6246 */ 6247 timevaladd(&sp->ts, &tv); 6248 } 6249 break; 6250 case CHUNK_FLAGS_PR_SCTP_RTX: 6251 /* 6252 * Time to live is a the number or retransmissions stored in 6253 * tv_sec. 6254 */ 6255 sp->ts.tv_sec = sp->timetolive; 6256 sp->ts.tv_usec = 0; 6257 break; 6258 default: 6259 SCTPDBG(SCTP_DEBUG_USRREQ1, 6260 "Unknown PR_SCTP policy %u.\n", 6261 PR_SCTP_POLICY(sp->sinfo_flags)); 6262 break; 6263 } 6264 } 6265 6266 static int 6267 sctp_msg_append(struct sctp_tcb *stcb, 6268 struct sctp_nets *net, 6269 struct mbuf *m, 6270 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock) 6271 { 6272 int error = 0; 6273 struct mbuf *at; 6274 struct sctp_stream_queue_pending *sp = NULL; 6275 struct sctp_stream_out *strm; 6276 6277 /* 6278 * Given an mbuf chain, put it into the association send queue and 6279 * place it on the wheel 6280 */ 6281 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) { 6282 /* Invalid stream number */ 6283 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 6284 error = EINVAL; 6285 goto out_now; 6286 } 6287 if ((stcb->asoc.stream_locked) && 6288 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) { 6289 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 6290 error = EINVAL; 6291 goto out_now; 6292 } 6293 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 6294 /* Now can we send this? */ 6295 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) || 6296 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 6297 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 6298 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) { 6299 /* got data while shutting down */ 6300 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 6301 error = ECONNRESET; 6302 goto out_now; 6303 } 6304 sctp_alloc_a_strmoq(stcb, sp); 6305 if (sp == NULL) { 6306 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6307 error = ENOMEM; 6308 goto out_now; 6309 } 6310 sp->sinfo_flags = srcv->sinfo_flags; 6311 sp->timetolive = srcv->sinfo_timetolive; 6312 sp->ppid = srcv->sinfo_ppid; 6313 sp->context = srcv->sinfo_context; 6314 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 6315 sp->net = net; 6316 atomic_add_int(&sp->net->ref_count, 1); 6317 } else { 6318 sp->net = NULL; 6319 } 6320 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 6321 sp->stream = srcv->sinfo_stream; 6322 sp->msg_is_complete = 1; 6323 sp->sender_all_done = 1; 6324 sp->some_taken = 0; 6325 sp->data = m; 6326 sp->tail_mbuf = NULL; 6327 sctp_set_prsctp_policy(sp); 6328 /* 6329 * We could in theory (for sendall) sifa the length in, but we would 6330 * still have to hunt through the chain since we need to setup the 6331 * tail_mbuf 6332 */ 6333 sp->length = 0; 6334 for (at = m; at; at = SCTP_BUF_NEXT(at)) { 6335 if (SCTP_BUF_NEXT(at) == NULL) 6336 sp->tail_mbuf = at; 6337 sp->length += SCTP_BUF_LEN(at); 6338 } 6339 if (srcv->sinfo_keynumber_valid) { 6340 sp->auth_keyid = srcv->sinfo_keynumber; 6341 } else { 6342 sp->auth_keyid = stcb->asoc.authinfo.active_keyid; 6343 } 6344 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { 6345 sctp_auth_key_acquire(stcb, sp->auth_keyid); 6346 sp->holds_key_ref = 1; 6347 } 6348 if (hold_stcb_lock == 0) { 6349 SCTP_TCB_SEND_LOCK(stcb); 6350 } 6351 sctp_snd_sb_alloc(stcb, sp->length); 6352 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1); 6353 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 6354 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1); 6355 m = NULL; 6356 if (hold_stcb_lock == 0) { 6357 SCTP_TCB_SEND_UNLOCK(stcb); 6358 } 6359 out_now: 6360 if (m) { 6361 sctp_m_freem(m); 6362 } 6363 return (error); 6364 } 6365 6366 6367 static struct mbuf * 6368 sctp_copy_mbufchain(struct mbuf *clonechain, 6369 struct mbuf *outchain, 6370 struct mbuf **endofchain, 6371 int can_take_mbuf, 6372 int sizeofcpy, 6373 uint8_t copy_by_ref) 6374 { 6375 struct mbuf *m; 6376 struct mbuf *appendchain; 6377 caddr_t cp; 6378 int len; 6379 6380 if (endofchain == NULL) { 6381 /* error */ 6382 error_out: 6383 if (outchain) 6384 sctp_m_freem(outchain); 6385 return (NULL); 6386 } 6387 if (can_take_mbuf) { 6388 appendchain = clonechain; 6389 } else { 6390 if (!copy_by_ref && 6391 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN))) 6392 ) { 6393 /* Its not in a cluster */ 6394 if (*endofchain == NULL) { 6395 /* lets get a mbuf cluster */ 6396 if (outchain == NULL) { 6397 /* This is the general case */ 6398 new_mbuf: 6399 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER); 6400 if (outchain == NULL) { 6401 goto error_out; 6402 } 6403 SCTP_BUF_LEN(outchain) = 0; 6404 *endofchain = outchain; 6405 /* get the prepend space */ 6406 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4)); 6407 } else { 6408 /* 6409 * We really should not get a NULL 6410 * in endofchain 6411 */ 6412 /* find end */ 6413 m = outchain; 6414 while (m) { 6415 if (SCTP_BUF_NEXT(m) == NULL) { 6416 *endofchain = m; 6417 break; 6418 } 6419 m = SCTP_BUF_NEXT(m); 6420 } 6421 /* sanity */ 6422 if (*endofchain == NULL) { 6423 /* 6424 * huh, TSNH XXX maybe we 6425 * should panic 6426 */ 6427 sctp_m_freem(outchain); 6428 goto new_mbuf; 6429 } 6430 } 6431 /* get the new end of length */ 6432 len = M_TRAILINGSPACE(*endofchain); 6433 } else { 6434 /* how much is left at the end? */ 6435 len = M_TRAILINGSPACE(*endofchain); 6436 } 6437 /* Find the end of the data, for appending */ 6438 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain))); 6439 6440 /* Now lets copy it out */ 6441 if (len >= sizeofcpy) { 6442 /* It all fits, copy it in */ 6443 m_copydata(clonechain, 0, sizeofcpy, cp); 6444 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 6445 } else { 6446 /* fill up the end of the chain */ 6447 if (len > 0) { 6448 m_copydata(clonechain, 0, len, cp); 6449 SCTP_BUF_LEN((*endofchain)) += len; 6450 /* now we need another one */ 6451 sizeofcpy -= len; 6452 } 6453 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER); 6454 if (m == NULL) { 6455 /* We failed */ 6456 goto error_out; 6457 } 6458 SCTP_BUF_NEXT((*endofchain)) = m; 6459 *endofchain = m; 6460 cp = mtod((*endofchain), caddr_t); 6461 m_copydata(clonechain, len, sizeofcpy, cp); 6462 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 6463 } 6464 return (outchain); 6465 } else { 6466 /* copy the old fashion way */ 6467 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT); 6468 #ifdef SCTP_MBUF_LOGGING 6469 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 6470 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY); 6471 } 6472 #endif 6473 } 6474 } 6475 if (appendchain == NULL) { 6476 /* error */ 6477 if (outchain) 6478 sctp_m_freem(outchain); 6479 return (NULL); 6480 } 6481 if (outchain) { 6482 /* tack on to the end */ 6483 if (*endofchain != NULL) { 6484 SCTP_BUF_NEXT(((*endofchain))) = appendchain; 6485 } else { 6486 m = outchain; 6487 while (m) { 6488 if (SCTP_BUF_NEXT(m) == NULL) { 6489 SCTP_BUF_NEXT(m) = appendchain; 6490 break; 6491 } 6492 m = SCTP_BUF_NEXT(m); 6493 } 6494 } 6495 /* 6496 * save off the end and update the end-chain postion 6497 */ 6498 m = appendchain; 6499 while (m) { 6500 if (SCTP_BUF_NEXT(m) == NULL) { 6501 *endofchain = m; 6502 break; 6503 } 6504 m = SCTP_BUF_NEXT(m); 6505 } 6506 return (outchain); 6507 } else { 6508 /* save off the end and update the end-chain postion */ 6509 m = appendchain; 6510 while (m) { 6511 if (SCTP_BUF_NEXT(m) == NULL) { 6512 *endofchain = m; 6513 break; 6514 } 6515 m = SCTP_BUF_NEXT(m); 6516 } 6517 return (appendchain); 6518 } 6519 } 6520 6521 static int 6522 sctp_med_chunk_output(struct sctp_inpcb *inp, 6523 struct sctp_tcb *stcb, 6524 struct sctp_association *asoc, 6525 int *num_out, 6526 int *reason_code, 6527 int control_only, int from_where, 6528 struct timeval *now, int *now_filled, int frag_point, int so_locked 6529 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 6530 SCTP_UNUSED 6531 #endif 6532 ); 6533 6534 static void 6535 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr, 6536 uint32_t val SCTP_UNUSED) 6537 { 6538 struct sctp_copy_all *ca; 6539 struct mbuf *m; 6540 int ret = 0; 6541 int added_control = 0; 6542 int un_sent, do_chunk_output = 1; 6543 struct sctp_association *asoc; 6544 struct sctp_nets *net; 6545 6546 ca = (struct sctp_copy_all *)ptr; 6547 if (ca->m == NULL) { 6548 return; 6549 } 6550 if (ca->inp != inp) { 6551 /* TSNH */ 6552 return; 6553 } 6554 if (ca->sndlen > 0) { 6555 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT); 6556 if (m == NULL) { 6557 /* can't copy so we are done */ 6558 ca->cnt_failed++; 6559 return; 6560 } 6561 #ifdef SCTP_MBUF_LOGGING 6562 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 6563 sctp_log_mbc(m, SCTP_MBUF_ICOPY); 6564 } 6565 #endif 6566 } else { 6567 m = NULL; 6568 } 6569 SCTP_TCB_LOCK_ASSERT(stcb); 6570 if (stcb->asoc.alternate) { 6571 net = stcb->asoc.alternate; 6572 } else { 6573 net = stcb->asoc.primary_destination; 6574 } 6575 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) { 6576 /* Abort this assoc with m as the user defined reason */ 6577 if (m != NULL) { 6578 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT); 6579 } else { 6580 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 6581 0, M_NOWAIT, 1, MT_DATA); 6582 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr); 6583 } 6584 if (m != NULL) { 6585 struct sctp_paramhdr *ph; 6586 6587 ph = mtod(m, struct sctp_paramhdr *); 6588 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 6589 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen); 6590 } 6591 /* 6592 * We add one here to keep the assoc from dis-appearing on 6593 * us. 6594 */ 6595 atomic_add_int(&stcb->asoc.refcnt, 1); 6596 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED); 6597 /* 6598 * sctp_abort_an_association calls sctp_free_asoc() free 6599 * association will NOT free it since we incremented the 6600 * refcnt .. we do this to prevent it being freed and things 6601 * getting tricky since we could end up (from free_asoc) 6602 * calling inpcb_free which would get a recursive lock call 6603 * to the iterator lock.. But as a consequence of that the 6604 * stcb will return to us un-locked.. since free_asoc 6605 * returns with either no TCB or the TCB unlocked, we must 6606 * relock.. to unlock in the iterator timer :-0 6607 */ 6608 SCTP_TCB_LOCK(stcb); 6609 atomic_add_int(&stcb->asoc.refcnt, -1); 6610 goto no_chunk_output; 6611 } else { 6612 if (m) { 6613 ret = sctp_msg_append(stcb, net, m, 6614 &ca->sndrcv, 1); 6615 } 6616 asoc = &stcb->asoc; 6617 if (ca->sndrcv.sinfo_flags & SCTP_EOF) { 6618 /* shutdown this assoc */ 6619 int cnt; 6620 6621 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED); 6622 6623 if (TAILQ_EMPTY(&asoc->send_queue) && 6624 TAILQ_EMPTY(&asoc->sent_queue) && 6625 (cnt == 0)) { 6626 if (asoc->locked_on_sending) { 6627 goto abort_anyway; 6628 } 6629 /* 6630 * there is nothing queued to send, so I'm 6631 * done... 6632 */ 6633 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 6634 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 6635 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 6636 /* 6637 * only send SHUTDOWN the first time 6638 * through 6639 */ 6640 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 6641 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 6642 } 6643 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 6644 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 6645 sctp_stop_timers_for_shutdown(stcb); 6646 sctp_send_shutdown(stcb, net); 6647 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 6648 net); 6649 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 6650 asoc->primary_destination); 6651 added_control = 1; 6652 do_chunk_output = 0; 6653 } 6654 } else { 6655 /* 6656 * we still got (or just got) data to send, 6657 * so set SHUTDOWN_PENDING 6658 */ 6659 /* 6660 * XXX sockets draft says that SCTP_EOF 6661 * should be sent with no data. currently, 6662 * we will allow user data to be sent first 6663 * and move to SHUTDOWN-PENDING 6664 */ 6665 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 6666 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 6667 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 6668 if (asoc->locked_on_sending) { 6669 /* 6670 * Locked to send out the 6671 * data 6672 */ 6673 struct sctp_stream_queue_pending *sp; 6674 6675 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 6676 if (sp) { 6677 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 6678 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 6679 } 6680 } 6681 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 6682 if (TAILQ_EMPTY(&asoc->send_queue) && 6683 TAILQ_EMPTY(&asoc->sent_queue) && 6684 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 6685 abort_anyway: 6686 atomic_add_int(&stcb->asoc.refcnt, 1); 6687 sctp_abort_an_association(stcb->sctp_ep, stcb, 6688 NULL, SCTP_SO_NOT_LOCKED); 6689 atomic_add_int(&stcb->asoc.refcnt, -1); 6690 goto no_chunk_output; 6691 } 6692 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 6693 asoc->primary_destination); 6694 } 6695 } 6696 6697 } 6698 } 6699 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 6700 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 6701 6702 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 6703 (stcb->asoc.total_flight > 0) && 6704 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 6705 do_chunk_output = 0; 6706 } 6707 if (do_chunk_output) 6708 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED); 6709 else if (added_control) { 6710 int num_out, reason, now_filled = 0; 6711 struct timeval now; 6712 int frag_point; 6713 6714 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 6715 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 6716 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED); 6717 } 6718 no_chunk_output: 6719 if (ret) { 6720 ca->cnt_failed++; 6721 } else { 6722 ca->cnt_sent++; 6723 } 6724 } 6725 6726 static void 6727 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED) 6728 { 6729 struct sctp_copy_all *ca; 6730 6731 ca = (struct sctp_copy_all *)ptr; 6732 /* 6733 * Do a notify here? Kacheong suggests that the notify be done at 6734 * the send time.. so you would push up a notification if any send 6735 * failed. Don't know if this is feasable since the only failures we 6736 * have is "memory" related and if you cannot get an mbuf to send 6737 * the data you surely can't get an mbuf to send up to notify the 6738 * user you can't send the data :-> 6739 */ 6740 6741 /* now free everything */ 6742 sctp_m_freem(ca->m); 6743 SCTP_FREE(ca, SCTP_M_COPYAL); 6744 } 6745 6746 static struct mbuf * 6747 sctp_copy_out_all(struct uio *uio, int len) 6748 { 6749 struct mbuf *ret, *at; 6750 int left, willcpy, cancpy, error; 6751 6752 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA); 6753 if (ret == NULL) { 6754 /* TSNH */ 6755 return (NULL); 6756 } 6757 left = len; 6758 SCTP_BUF_LEN(ret) = 0; 6759 /* save space for the data chunk header */ 6760 cancpy = M_TRAILINGSPACE(ret); 6761 willcpy = min(cancpy, left); 6762 at = ret; 6763 while (left > 0) { 6764 /* Align data to the end */ 6765 error = uiomove(mtod(at, caddr_t), willcpy, uio); 6766 if (error) { 6767 err_out_now: 6768 sctp_m_freem(at); 6769 return (NULL); 6770 } 6771 SCTP_BUF_LEN(at) = willcpy; 6772 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0; 6773 left -= willcpy; 6774 if (left > 0) { 6775 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA); 6776 if (SCTP_BUF_NEXT(at) == NULL) { 6777 goto err_out_now; 6778 } 6779 at = SCTP_BUF_NEXT(at); 6780 SCTP_BUF_LEN(at) = 0; 6781 cancpy = M_TRAILINGSPACE(at); 6782 willcpy = min(cancpy, left); 6783 } 6784 } 6785 return (ret); 6786 } 6787 6788 static int 6789 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m, 6790 struct sctp_sndrcvinfo *srcv) 6791 { 6792 int ret; 6793 struct sctp_copy_all *ca; 6794 6795 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all), 6796 SCTP_M_COPYAL); 6797 if (ca == NULL) { 6798 sctp_m_freem(m); 6799 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6800 return (ENOMEM); 6801 } 6802 memset(ca, 0, sizeof(struct sctp_copy_all)); 6803 6804 ca->inp = inp; 6805 if (srcv) { 6806 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo)); 6807 } 6808 /* 6809 * take off the sendall flag, it would be bad if we failed to do 6810 * this :-0 6811 */ 6812 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL; 6813 /* get length and mbuf chain */ 6814 if (uio) { 6815 ca->sndlen = uio->uio_resid; 6816 ca->m = sctp_copy_out_all(uio, ca->sndlen); 6817 if (ca->m == NULL) { 6818 SCTP_FREE(ca, SCTP_M_COPYAL); 6819 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6820 return (ENOMEM); 6821 } 6822 } else { 6823 /* Gather the length of the send */ 6824 struct mbuf *mat; 6825 6826 ca->sndlen = 0; 6827 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) { 6828 ca->sndlen += SCTP_BUF_LEN(mat); 6829 } 6830 } 6831 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL, 6832 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES, 6833 SCTP_ASOC_ANY_STATE, 6834 (void *)ca, 0, 6835 sctp_sendall_completes, inp, 1); 6836 if (ret) { 6837 SCTP_PRINTF("Failed to initiate iterator for sendall\n"); 6838 SCTP_FREE(ca, SCTP_M_COPYAL); 6839 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); 6840 return (EFAULT); 6841 } 6842 return (0); 6843 } 6844 6845 6846 void 6847 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc) 6848 { 6849 struct sctp_tmit_chunk *chk, *nchk; 6850 6851 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 6852 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 6853 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 6854 if (chk->data) { 6855 sctp_m_freem(chk->data); 6856 chk->data = NULL; 6857 } 6858 asoc->ctrl_queue_cnt--; 6859 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6860 } 6861 } 6862 } 6863 6864 void 6865 sctp_toss_old_asconf(struct sctp_tcb *stcb) 6866 { 6867 struct sctp_association *asoc; 6868 struct sctp_tmit_chunk *chk, *nchk; 6869 struct sctp_asconf_chunk *acp; 6870 6871 asoc = &stcb->asoc; 6872 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 6873 /* find SCTP_ASCONF chunk in queue */ 6874 if (chk->rec.chunk_id.id == SCTP_ASCONF) { 6875 if (chk->data) { 6876 acp = mtod(chk->data, struct sctp_asconf_chunk *); 6877 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) { 6878 /* Not Acked yet */ 6879 break; 6880 } 6881 } 6882 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 6883 if (chk->data) { 6884 sctp_m_freem(chk->data); 6885 chk->data = NULL; 6886 } 6887 asoc->ctrl_queue_cnt--; 6888 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6889 } 6890 } 6891 } 6892 6893 6894 static void 6895 sctp_clean_up_datalist(struct sctp_tcb *stcb, 6896 struct sctp_association *asoc, 6897 struct sctp_tmit_chunk **data_list, 6898 int bundle_at, 6899 struct sctp_nets *net) 6900 { 6901 int i; 6902 struct sctp_tmit_chunk *tp1; 6903 6904 for (i = 0; i < bundle_at; i++) { 6905 /* off of the send queue */ 6906 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next); 6907 asoc->send_queue_cnt--; 6908 if (i > 0) { 6909 /* 6910 * Any chunk NOT 0 you zap the time chunk 0 gets 6911 * zapped or set based on if a RTO measurment is 6912 * needed. 6913 */ 6914 data_list[i]->do_rtt = 0; 6915 } 6916 /* record time */ 6917 data_list[i]->sent_rcv_time = net->last_sent_time; 6918 data_list[i]->rec.data.cwnd_at_send = net->cwnd; 6919 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq; 6920 if (data_list[i]->whoTo == NULL) { 6921 data_list[i]->whoTo = net; 6922 atomic_add_int(&net->ref_count, 1); 6923 } 6924 /* on to the sent queue */ 6925 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead); 6926 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { 6927 struct sctp_tmit_chunk *tpp; 6928 6929 /* need to move back */ 6930 back_up_more: 6931 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next); 6932 if (tpp == NULL) { 6933 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next); 6934 goto all_done; 6935 } 6936 tp1 = tpp; 6937 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { 6938 goto back_up_more; 6939 } 6940 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next); 6941 } else { 6942 TAILQ_INSERT_TAIL(&asoc->sent_queue, 6943 data_list[i], 6944 sctp_next); 6945 } 6946 all_done: 6947 /* This does not lower until the cum-ack passes it */ 6948 asoc->sent_queue_cnt++; 6949 if ((asoc->peers_rwnd <= 0) && 6950 (asoc->total_flight == 0) && 6951 (bundle_at == 1)) { 6952 /* Mark the chunk as being a window probe */ 6953 SCTP_STAT_INCR(sctps_windowprobed); 6954 } 6955 #ifdef SCTP_AUDITING_ENABLED 6956 sctp_audit_log(0xC2, 3); 6957 #endif 6958 data_list[i]->sent = SCTP_DATAGRAM_SENT; 6959 data_list[i]->snd_count = 1; 6960 data_list[i]->rec.data.chunk_was_revoked = 0; 6961 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 6962 sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 6963 data_list[i]->whoTo->flight_size, 6964 data_list[i]->book_size, 6965 (uintptr_t) data_list[i]->whoTo, 6966 data_list[i]->rec.data.TSN_seq); 6967 } 6968 sctp_flight_size_increase(data_list[i]); 6969 sctp_total_flight_increase(stcb, data_list[i]); 6970 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { 6971 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 6972 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); 6973 } 6974 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 6975 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); 6976 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 6977 /* SWS sender side engages */ 6978 asoc->peers_rwnd = 0; 6979 } 6980 } 6981 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) { 6982 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net); 6983 } 6984 } 6985 6986 static void 6987 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked 6988 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 6989 SCTP_UNUSED 6990 #endif 6991 ) 6992 { 6993 struct sctp_tmit_chunk *chk, *nchk; 6994 6995 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 6996 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 6997 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ 6998 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 6999 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 7000 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) || 7001 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 7002 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 7003 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 7004 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 7005 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 7006 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 7007 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 7008 /* Stray chunks must be cleaned up */ 7009 clean_up_anyway: 7010 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 7011 if (chk->data) { 7012 sctp_m_freem(chk->data); 7013 chk->data = NULL; 7014 } 7015 asoc->ctrl_queue_cnt--; 7016 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) 7017 asoc->fwd_tsn_cnt--; 7018 sctp_free_a_chunk(stcb, chk, so_locked); 7019 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 7020 /* special handling, we must look into the param */ 7021 if (chk != asoc->str_reset) { 7022 goto clean_up_anyway; 7023 } 7024 } 7025 } 7026 } 7027 7028 7029 static int 7030 sctp_can_we_split_this(struct sctp_tcb *stcb, 7031 uint32_t length, 7032 uint32_t goal_mtu, uint32_t frag_point, int eeor_on) 7033 { 7034 /* 7035 * Make a decision on if I should split a msg into multiple parts. 7036 * This is only asked of incomplete messages. 7037 */ 7038 if (eeor_on) { 7039 /* 7040 * If we are doing EEOR we need to always send it if its the 7041 * entire thing, since it might be all the guy is putting in 7042 * the hopper. 7043 */ 7044 if (goal_mtu >= length) { 7045 /*- 7046 * If we have data outstanding, 7047 * we get another chance when the sack 7048 * arrives to transmit - wait for more data 7049 */ 7050 if (stcb->asoc.total_flight == 0) { 7051 /* 7052 * If nothing is in flight, we zero the 7053 * packet counter. 7054 */ 7055 return (length); 7056 } 7057 return (0); 7058 7059 } else { 7060 /* You can fill the rest */ 7061 return (goal_mtu); 7062 } 7063 } 7064 /*- 7065 * For those strange folk that make the send buffer 7066 * smaller than our fragmentation point, we can't 7067 * get a full msg in so we have to allow splitting. 7068 */ 7069 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) { 7070 return (length); 7071 } 7072 if ((length <= goal_mtu) || 7073 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) { 7074 /* Sub-optimial residual don't split in non-eeor mode. */ 7075 return (0); 7076 } 7077 /* 7078 * If we reach here length is larger than the goal_mtu. Do we wish 7079 * to split it for the sake of packet putting together? 7080 */ 7081 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) { 7082 /* Its ok to split it */ 7083 return (min(goal_mtu, frag_point)); 7084 } 7085 /* Nope, can't split */ 7086 return (0); 7087 7088 } 7089 7090 static uint32_t 7091 sctp_move_to_outqueue(struct sctp_tcb *stcb, 7092 struct sctp_stream_out *strq, 7093 uint32_t goal_mtu, 7094 uint32_t frag_point, 7095 int *locked, 7096 int *giveup, 7097 int eeor_mode, 7098 int *bail, 7099 int so_locked 7100 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7101 SCTP_UNUSED 7102 #endif 7103 ) 7104 { 7105 /* Move from the stream to the send_queue keeping track of the total */ 7106 struct sctp_association *asoc; 7107 struct sctp_stream_queue_pending *sp; 7108 struct sctp_tmit_chunk *chk; 7109 struct sctp_data_chunk *dchkh; 7110 uint32_t to_move, length; 7111 uint8_t rcv_flags = 0; 7112 uint8_t some_taken; 7113 uint8_t send_lock_up = 0; 7114 7115 SCTP_TCB_LOCK_ASSERT(stcb); 7116 asoc = &stcb->asoc; 7117 one_more_time: 7118 /* sa_ignore FREED_MEMORY */ 7119 sp = TAILQ_FIRST(&strq->outqueue); 7120 if (sp == NULL) { 7121 *locked = 0; 7122 if (send_lock_up == 0) { 7123 SCTP_TCB_SEND_LOCK(stcb); 7124 send_lock_up = 1; 7125 } 7126 sp = TAILQ_FIRST(&strq->outqueue); 7127 if (sp) { 7128 goto one_more_time; 7129 } 7130 if (strq->last_msg_incomplete) { 7131 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n", 7132 strq->stream_no, 7133 strq->last_msg_incomplete); 7134 strq->last_msg_incomplete = 0; 7135 } 7136 to_move = 0; 7137 if (send_lock_up) { 7138 SCTP_TCB_SEND_UNLOCK(stcb); 7139 send_lock_up = 0; 7140 } 7141 goto out_of; 7142 } 7143 if ((sp->msg_is_complete) && (sp->length == 0)) { 7144 if (sp->sender_all_done) { 7145 /* 7146 * We are doing differed cleanup. Last time through 7147 * when we took all the data the sender_all_done was 7148 * not set. 7149 */ 7150 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) { 7151 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n"); 7152 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 7153 sp->sender_all_done, 7154 sp->length, 7155 sp->msg_is_complete, 7156 sp->put_last_out, 7157 send_lock_up); 7158 } 7159 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) { 7160 SCTP_TCB_SEND_LOCK(stcb); 7161 send_lock_up = 1; 7162 } 7163 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 7164 TAILQ_REMOVE(&strq->outqueue, sp, next); 7165 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); 7166 if (sp->net) { 7167 sctp_free_remote_addr(sp->net); 7168 sp->net = NULL; 7169 } 7170 if (sp->data) { 7171 sctp_m_freem(sp->data); 7172 sp->data = NULL; 7173 } 7174 sctp_free_a_strmoq(stcb, sp, so_locked); 7175 /* we can't be locked to it */ 7176 *locked = 0; 7177 stcb->asoc.locked_on_sending = NULL; 7178 if (send_lock_up) { 7179 SCTP_TCB_SEND_UNLOCK(stcb); 7180 send_lock_up = 0; 7181 } 7182 /* back to get the next msg */ 7183 goto one_more_time; 7184 } else { 7185 /* 7186 * sender just finished this but still holds a 7187 * reference 7188 */ 7189 *locked = 1; 7190 *giveup = 1; 7191 to_move = 0; 7192 goto out_of; 7193 } 7194 } else { 7195 /* is there some to get */ 7196 if (sp->length == 0) { 7197 /* no */ 7198 *locked = 1; 7199 *giveup = 1; 7200 to_move = 0; 7201 goto out_of; 7202 } else if (sp->discard_rest) { 7203 if (send_lock_up == 0) { 7204 SCTP_TCB_SEND_LOCK(stcb); 7205 send_lock_up = 1; 7206 } 7207 /* Whack down the size */ 7208 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length); 7209 if ((stcb->sctp_socket != NULL) && \ 7210 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 7211 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { 7212 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length); 7213 } 7214 if (sp->data) { 7215 sctp_m_freem(sp->data); 7216 sp->data = NULL; 7217 sp->tail_mbuf = NULL; 7218 } 7219 sp->length = 0; 7220 sp->some_taken = 1; 7221 *locked = 1; 7222 *giveup = 1; 7223 to_move = 0; 7224 goto out_of; 7225 } 7226 } 7227 some_taken = sp->some_taken; 7228 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) { 7229 sp->msg_is_complete = 1; 7230 } 7231 re_look: 7232 length = sp->length; 7233 if (sp->msg_is_complete) { 7234 /* The message is complete */ 7235 to_move = min(length, frag_point); 7236 if (to_move == length) { 7237 /* All of it fits in the MTU */ 7238 if (sp->some_taken) { 7239 rcv_flags |= SCTP_DATA_LAST_FRAG; 7240 sp->put_last_out = 1; 7241 } else { 7242 rcv_flags |= SCTP_DATA_NOT_FRAG; 7243 sp->put_last_out = 1; 7244 } 7245 } else { 7246 /* Not all of it fits, we fragment */ 7247 if (sp->some_taken == 0) { 7248 rcv_flags |= SCTP_DATA_FIRST_FRAG; 7249 } 7250 sp->some_taken = 1; 7251 } 7252 } else { 7253 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode); 7254 if (to_move) { 7255 /*- 7256 * We use a snapshot of length in case it 7257 * is expanding during the compare. 7258 */ 7259 uint32_t llen; 7260 7261 llen = length; 7262 if (to_move >= llen) { 7263 to_move = llen; 7264 if (send_lock_up == 0) { 7265 /*- 7266 * We are taking all of an incomplete msg 7267 * thus we need a send lock. 7268 */ 7269 SCTP_TCB_SEND_LOCK(stcb); 7270 send_lock_up = 1; 7271 if (sp->msg_is_complete) { 7272 /* 7273 * the sender finished the 7274 * msg 7275 */ 7276 goto re_look; 7277 } 7278 } 7279 } 7280 if (sp->some_taken == 0) { 7281 rcv_flags |= SCTP_DATA_FIRST_FRAG; 7282 sp->some_taken = 1; 7283 } 7284 } else { 7285 /* Nothing to take. */ 7286 if (sp->some_taken) { 7287 *locked = 1; 7288 } 7289 *giveup = 1; 7290 to_move = 0; 7291 goto out_of; 7292 } 7293 } 7294 7295 /* If we reach here, we can copy out a chunk */ 7296 sctp_alloc_a_chunk(stcb, chk); 7297 if (chk == NULL) { 7298 /* No chunk memory */ 7299 *giveup = 1; 7300 to_move = 0; 7301 goto out_of; 7302 } 7303 /* 7304 * Setup for unordered if needed by looking at the user sent info 7305 * flags. 7306 */ 7307 if (sp->sinfo_flags & SCTP_UNORDERED) { 7308 rcv_flags |= SCTP_DATA_UNORDERED; 7309 } 7310 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) || 7311 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) { 7312 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY; 7313 } 7314 /* clear out the chunk before setting up */ 7315 memset(chk, 0, sizeof(*chk)); 7316 chk->rec.data.rcv_flags = rcv_flags; 7317 7318 if (to_move >= length) { 7319 /* we think we can steal the whole thing */ 7320 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) { 7321 SCTP_TCB_SEND_LOCK(stcb); 7322 send_lock_up = 1; 7323 } 7324 if (to_move < sp->length) { 7325 /* bail, it changed */ 7326 goto dont_do_it; 7327 } 7328 chk->data = sp->data; 7329 chk->last_mbuf = sp->tail_mbuf; 7330 /* register the stealing */ 7331 sp->data = sp->tail_mbuf = NULL; 7332 } else { 7333 struct mbuf *m; 7334 7335 dont_do_it: 7336 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT); 7337 chk->last_mbuf = NULL; 7338 if (chk->data == NULL) { 7339 sp->some_taken = some_taken; 7340 sctp_free_a_chunk(stcb, chk, so_locked); 7341 *bail = 1; 7342 to_move = 0; 7343 goto out_of; 7344 } 7345 #ifdef SCTP_MBUF_LOGGING 7346 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 7347 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY); 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_NOWAIT, 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 (sp->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_NOWAIT); 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 = strq->next_sequence_send; 7469 if ((rcv_flags & SCTP_DATA_LAST_FRAG) && 7470 !(rcv_flags & SCTP_DATA_UNORDERED)) { 7471 strq->next_sequence_send++; 7472 } 7473 chk->rec.data.stream_number = sp->stream; 7474 chk->rec.data.payloadtype = sp->ppid; 7475 chk->rec.data.context = sp->context; 7476 chk->rec.data.doing_fast_retransmit = 0; 7477 7478 chk->rec.data.timetodrop = sp->ts; 7479 chk->flags = sp->act_flags; 7480 7481 if (sp->net) { 7482 chk->whoTo = sp->net; 7483 atomic_add_int(&chk->whoTo->ref_count, 1); 7484 } else 7485 chk->whoTo = NULL; 7486 7487 if (sp->holds_key_ref) { 7488 chk->auth_keyid = sp->auth_keyid; 7489 sctp_auth_key_acquire(stcb, chk->auth_keyid); 7490 chk->holds_key_ref = 1; 7491 } 7492 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1); 7493 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) { 7494 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND, 7495 (uintptr_t) stcb, sp->length, 7496 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq), 7497 chk->rec.data.TSN_seq); 7498 } 7499 dchkh = mtod(chk->data, struct sctp_data_chunk *); 7500 /* 7501 * Put the rest of the things in place now. Size was done earlier in 7502 * previous loop prior to padding. 7503 */ 7504 7505 #ifdef SCTP_ASOCLOG_OF_TSNS 7506 SCTP_TCB_LOCK_ASSERT(stcb); 7507 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) { 7508 asoc->tsn_out_at = 0; 7509 asoc->tsn_out_wrapped = 1; 7510 } 7511 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq; 7512 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number; 7513 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq; 7514 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size; 7515 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags; 7516 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb; 7517 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at; 7518 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2; 7519 asoc->tsn_out_at++; 7520 #endif 7521 7522 dchkh->ch.chunk_type = SCTP_DATA; 7523 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags; 7524 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq); 7525 dchkh->dp.stream_id = htons(strq->stream_no); 7526 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq); 7527 dchkh->dp.protocol_id = chk->rec.data.payloadtype; 7528 dchkh->ch.chunk_length = htons(chk->send_size); 7529 /* Now advance the chk->send_size by the actual pad needed. */ 7530 if (chk->send_size < SCTP_SIZE32(chk->book_size)) { 7531 /* need a pad */ 7532 struct mbuf *lm; 7533 int pads; 7534 7535 pads = SCTP_SIZE32(chk->book_size) - chk->send_size; 7536 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf); 7537 if (lm != NULL) { 7538 chk->last_mbuf = lm; 7539 chk->pad_inplace = 1; 7540 } 7541 chk->send_size += pads; 7542 } 7543 if (PR_SCTP_ENABLED(chk->flags)) { 7544 asoc->pr_sctp_cnt++; 7545 } 7546 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) { 7547 /* All done pull and kill the message */ 7548 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 7549 if (sp->put_last_out == 0) { 7550 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n"); 7551 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 7552 sp->sender_all_done, 7553 sp->length, 7554 sp->msg_is_complete, 7555 sp->put_last_out, 7556 send_lock_up); 7557 } 7558 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) { 7559 SCTP_TCB_SEND_LOCK(stcb); 7560 send_lock_up = 1; 7561 } 7562 TAILQ_REMOVE(&strq->outqueue, sp, next); 7563 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); 7564 if (sp->net) { 7565 sctp_free_remote_addr(sp->net); 7566 sp->net = NULL; 7567 } 7568 if (sp->data) { 7569 sctp_m_freem(sp->data); 7570 sp->data = NULL; 7571 } 7572 sctp_free_a_strmoq(stcb, sp, so_locked); 7573 7574 /* we can't be locked to it */ 7575 *locked = 0; 7576 stcb->asoc.locked_on_sending = NULL; 7577 } else { 7578 /* more to go, we are locked */ 7579 *locked = 1; 7580 } 7581 asoc->chunks_on_out_queue++; 7582 strq->chunks_on_queues++; 7583 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next); 7584 asoc->send_queue_cnt++; 7585 out_of: 7586 if (send_lock_up) { 7587 SCTP_TCB_SEND_UNLOCK(stcb); 7588 } 7589 return (to_move); 7590 } 7591 7592 7593 static void 7594 sctp_fill_outqueue(struct sctp_tcb *stcb, 7595 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked 7596 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7597 SCTP_UNUSED 7598 #endif 7599 ) 7600 { 7601 struct sctp_association *asoc; 7602 struct sctp_stream_out *strq; 7603 int goal_mtu, moved_how_much, total_moved = 0, bail = 0; 7604 int locked, giveup; 7605 7606 SCTP_TCB_LOCK_ASSERT(stcb); 7607 asoc = &stcb->asoc; 7608 switch (net->ro._l_addr.sa.sa_family) { 7609 #ifdef INET 7610 case AF_INET: 7611 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 7612 break; 7613 #endif 7614 #ifdef INET6 7615 case AF_INET6: 7616 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD; 7617 break; 7618 #endif 7619 default: 7620 /* TSNH */ 7621 goal_mtu = net->mtu; 7622 break; 7623 } 7624 /* Need an allowance for the data chunk header too */ 7625 goal_mtu -= sizeof(struct sctp_data_chunk); 7626 7627 /* must make even word boundary */ 7628 goal_mtu &= 0xfffffffc; 7629 if (asoc->locked_on_sending) { 7630 /* We are stuck on one stream until the message completes. */ 7631 strq = asoc->locked_on_sending; 7632 locked = 1; 7633 } else { 7634 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); 7635 locked = 0; 7636 } 7637 while ((goal_mtu > 0) && strq) { 7638 giveup = 0; 7639 bail = 0; 7640 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked, 7641 &giveup, eeor_mode, &bail, so_locked); 7642 if (moved_how_much) 7643 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much); 7644 7645 if (locked) { 7646 asoc->locked_on_sending = strq; 7647 if ((moved_how_much == 0) || (giveup) || bail) 7648 /* no more to move for now */ 7649 break; 7650 } else { 7651 asoc->locked_on_sending = NULL; 7652 if ((giveup) || bail) { 7653 break; 7654 } 7655 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); 7656 if (strq == NULL) { 7657 break; 7658 } 7659 } 7660 total_moved += moved_how_much; 7661 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk)); 7662 goal_mtu &= 0xfffffffc; 7663 } 7664 if (bail) 7665 *quit_now = 1; 7666 7667 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc); 7668 7669 if (total_moved == 0) { 7670 if ((stcb->asoc.sctp_cmt_on_off == 0) && 7671 (net == stcb->asoc.primary_destination)) { 7672 /* ran dry for primary network net */ 7673 SCTP_STAT_INCR(sctps_primary_randry); 7674 } else if (stcb->asoc.sctp_cmt_on_off > 0) { 7675 /* ran dry with CMT on */ 7676 SCTP_STAT_INCR(sctps_cmt_randry); 7677 } 7678 } 7679 } 7680 7681 void 7682 sctp_fix_ecn_echo(struct sctp_association *asoc) 7683 { 7684 struct sctp_tmit_chunk *chk; 7685 7686 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7687 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 7688 chk->sent = SCTP_DATAGRAM_UNSENT; 7689 } 7690 } 7691 } 7692 7693 void 7694 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net) 7695 { 7696 struct sctp_association *asoc; 7697 struct sctp_tmit_chunk *chk; 7698 struct sctp_stream_queue_pending *sp; 7699 unsigned int i; 7700 7701 if (net == NULL) { 7702 return; 7703 } 7704 asoc = &stcb->asoc; 7705 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 7706 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { 7707 if (sp->net == net) { 7708 sctp_free_remote_addr(sp->net); 7709 sp->net = NULL; 7710 } 7711 } 7712 } 7713 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 7714 if (chk->whoTo == net) { 7715 sctp_free_remote_addr(chk->whoTo); 7716 chk->whoTo = NULL; 7717 } 7718 } 7719 } 7720 7721 int 7722 sctp_med_chunk_output(struct sctp_inpcb *inp, 7723 struct sctp_tcb *stcb, 7724 struct sctp_association *asoc, 7725 int *num_out, 7726 int *reason_code, 7727 int control_only, int from_where, 7728 struct timeval *now, int *now_filled, int frag_point, int so_locked 7729 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7730 SCTP_UNUSED 7731 #endif 7732 ) 7733 { 7734 /** 7735 * Ok this is the generic chunk service queue. we must do the 7736 * following: - Service the stream queue that is next, moving any 7737 * message (note I must get a complete message i.e. FIRST/MIDDLE and 7738 * LAST to the out queue in one pass) and assigning TSN's - Check to 7739 * see if the cwnd/rwnd allows any output, if so we go ahead and 7740 * fomulate and send the low level chunks. Making sure to combine 7741 * any control in the control chunk queue also. 7742 */ 7743 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL; 7744 struct mbuf *outchain, *endoutchain; 7745 struct sctp_tmit_chunk *chk, *nchk; 7746 7747 /* temp arrays for unlinking */ 7748 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 7749 int no_fragmentflg, error; 7750 unsigned int max_rwnd_per_dest, max_send_per_dest; 7751 int one_chunk, hbflag, skip_data_for_this_net; 7752 int asconf, cookie, no_out_cnt; 7753 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode; 7754 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out; 7755 int tsns_sent = 0; 7756 uint32_t auth_offset = 0; 7757 struct sctp_auth_chunk *auth = NULL; 7758 uint16_t auth_keyid; 7759 int override_ok = 1; 7760 int skip_fill_up = 0; 7761 int data_auth_reqd = 0; 7762 7763 /* 7764 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the 7765 * destination. 7766 */ 7767 int quit_now = 0; 7768 7769 *num_out = 0; 7770 *reason_code = 0; 7771 auth_keyid = stcb->asoc.authinfo.active_keyid; 7772 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) || 7773 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) || 7774 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { 7775 eeor_mode = 1; 7776 } else { 7777 eeor_mode = 0; 7778 } 7779 ctl_cnt = no_out_cnt = asconf = cookie = 0; 7780 /* 7781 * First lets prime the pump. For each destination, if there is room 7782 * in the flight size, attempt to pull an MTU's worth out of the 7783 * stream queues into the general send_queue 7784 */ 7785 #ifdef SCTP_AUDITING_ENABLED 7786 sctp_audit_log(0xC2, 2); 7787 #endif 7788 SCTP_TCB_LOCK_ASSERT(stcb); 7789 hbflag = 0; 7790 if ((control_only) || (asoc->stream_reset_outstanding)) 7791 no_data_chunks = 1; 7792 else 7793 no_data_chunks = 0; 7794 7795 /* Nothing to possible to send? */ 7796 if ((TAILQ_EMPTY(&asoc->control_send_queue) || 7797 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) && 7798 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7799 TAILQ_EMPTY(&asoc->send_queue) && 7800 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { 7801 nothing_to_send: 7802 *reason_code = 9; 7803 return (0); 7804 } 7805 if (asoc->peers_rwnd == 0) { 7806 /* No room in peers rwnd */ 7807 *reason_code = 1; 7808 if (asoc->total_flight > 0) { 7809 /* we are allowed one chunk in flight */ 7810 no_data_chunks = 1; 7811 } 7812 } 7813 if (stcb->asoc.ecn_echo_cnt_onq) { 7814 /* Record where a sack goes, if any */ 7815 if (no_data_chunks && 7816 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) { 7817 /* Nothing but ECNe to send - we don't do that */ 7818 goto nothing_to_send; 7819 } 7820 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7821 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 7822 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { 7823 sack_goes_to = chk->whoTo; 7824 break; 7825 } 7826 } 7827 } 7828 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets); 7829 if (stcb->sctp_socket) 7830 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets; 7831 else 7832 max_send_per_dest = 0; 7833 if (no_data_chunks == 0) { 7834 /* How many non-directed chunks are there? */ 7835 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 7836 if (chk->whoTo == NULL) { 7837 /* 7838 * We already have non-directed chunks on 7839 * the queue, no need to do a fill-up. 7840 */ 7841 skip_fill_up = 1; 7842 break; 7843 } 7844 } 7845 7846 } 7847 if ((no_data_chunks == 0) && 7848 (skip_fill_up == 0) && 7849 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) { 7850 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 7851 /* 7852 * This for loop we are in takes in each net, if 7853 * its's got space in cwnd and has data sent to it 7854 * (when CMT is off) then it calls 7855 * sctp_fill_outqueue for the net. This gets data on 7856 * the send queue for that network. 7857 * 7858 * In sctp_fill_outqueue TSN's are assigned and data is 7859 * copied out of the stream buffers. Note mostly 7860 * copy by reference (we hope). 7861 */ 7862 net->window_probe = 0; 7863 if ((net != stcb->asoc.alternate) && 7864 ((net->dest_state & SCTP_ADDR_PF) || 7865 (!(net->dest_state & SCTP_ADDR_REACHABLE)) || 7866 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) { 7867 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7868 sctp_log_cwnd(stcb, net, 1, 7869 SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7870 } 7871 continue; 7872 } 7873 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && 7874 (net->flight_size == 0)) { 7875 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net); 7876 } 7877 if (net->flight_size >= net->cwnd) { 7878 /* skip this network, no room - can't fill */ 7879 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7880 sctp_log_cwnd(stcb, net, 3, 7881 SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7882 } 7883 continue; 7884 } 7885 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7886 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7887 } 7888 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked); 7889 if (quit_now) { 7890 /* memory alloc failure */ 7891 no_data_chunks = 1; 7892 break; 7893 } 7894 } 7895 } 7896 /* now service each destination and send out what we can for it */ 7897 /* Nothing to send? */ 7898 if (TAILQ_EMPTY(&asoc->control_send_queue) && 7899 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7900 TAILQ_EMPTY(&asoc->send_queue)) { 7901 *reason_code = 8; 7902 return (0); 7903 } 7904 if (asoc->sctp_cmt_on_off > 0) { 7905 /* get the last start point */ 7906 start_at = asoc->last_net_cmt_send_started; 7907 if (start_at == NULL) { 7908 /* null so to beginning */ 7909 start_at = TAILQ_FIRST(&asoc->nets); 7910 } else { 7911 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next); 7912 if (start_at == NULL) { 7913 start_at = TAILQ_FIRST(&asoc->nets); 7914 } 7915 } 7916 asoc->last_net_cmt_send_started = start_at; 7917 } else { 7918 start_at = TAILQ_FIRST(&asoc->nets); 7919 } 7920 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7921 if (chk->whoTo == NULL) { 7922 if (asoc->alternate) { 7923 chk->whoTo = asoc->alternate; 7924 } else { 7925 chk->whoTo = asoc->primary_destination; 7926 } 7927 atomic_add_int(&chk->whoTo->ref_count, 1); 7928 } 7929 } 7930 old_start_at = NULL; 7931 again_one_more_time: 7932 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) { 7933 /* how much can we send? */ 7934 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */ 7935 if (old_start_at && (old_start_at == net)) { 7936 /* through list ocmpletely. */ 7937 break; 7938 } 7939 tsns_sent = 0xa; 7940 if (TAILQ_EMPTY(&asoc->control_send_queue) && 7941 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7942 (net->flight_size >= net->cwnd)) { 7943 /* 7944 * Nothing on control or asconf and flight is full, 7945 * we can skip even in the CMT case. 7946 */ 7947 continue; 7948 } 7949 bundle_at = 0; 7950 endoutchain = outchain = NULL; 7951 no_fragmentflg = 1; 7952 one_chunk = 0; 7953 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 7954 skip_data_for_this_net = 1; 7955 } else { 7956 skip_data_for_this_net = 0; 7957 } 7958 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) { 7959 /* 7960 * if we have a route and an ifp check to see if we 7961 * have room to send to this guy 7962 */ 7963 struct ifnet *ifp; 7964 7965 ifp = net->ro.ro_rt->rt_ifp; 7966 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) { 7967 SCTP_STAT_INCR(sctps_ifnomemqueued); 7968 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 7969 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED); 7970 } 7971 continue; 7972 } 7973 } 7974 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { 7975 #ifdef INET 7976 case AF_INET: 7977 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 7978 break; 7979 #endif 7980 #ifdef INET6 7981 case AF_INET6: 7982 mtu = net->mtu - SCTP_MIN_OVERHEAD; 7983 break; 7984 #endif 7985 default: 7986 /* TSNH */ 7987 mtu = net->mtu; 7988 break; 7989 } 7990 mx_mtu = mtu; 7991 to_out = 0; 7992 if (mtu > asoc->peers_rwnd) { 7993 if (asoc->total_flight > 0) { 7994 /* We have a packet in flight somewhere */ 7995 r_mtu = asoc->peers_rwnd; 7996 } else { 7997 /* We are always allowed to send one MTU out */ 7998 one_chunk = 1; 7999 r_mtu = mtu; 8000 } 8001 } else { 8002 r_mtu = mtu; 8003 } 8004 error = 0; 8005 /************************/ 8006 /* ASCONF transmission */ 8007 /************************/ 8008 /* Now first lets go through the asconf queue */ 8009 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 8010 if (chk->rec.chunk_id.id != SCTP_ASCONF) { 8011 continue; 8012 } 8013 if (chk->whoTo == NULL) { 8014 if (asoc->alternate == NULL) { 8015 if (asoc->primary_destination != net) { 8016 break; 8017 } 8018 } else { 8019 if (asoc->alternate != net) { 8020 break; 8021 } 8022 } 8023 } else { 8024 if (chk->whoTo != net) { 8025 break; 8026 } 8027 } 8028 if (chk->data == NULL) { 8029 break; 8030 } 8031 if (chk->sent != SCTP_DATAGRAM_UNSENT && 8032 chk->sent != SCTP_DATAGRAM_RESEND) { 8033 break; 8034 } 8035 /* 8036 * if no AUTH is yet included and this chunk 8037 * requires it, make sure to account for it. We 8038 * don't apply the size until the AUTH chunk is 8039 * actually added below in case there is no room for 8040 * this chunk. NOTE: we overload the use of "omtu" 8041 * here 8042 */ 8043 if ((auth == NULL) && 8044 sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8045 stcb->asoc.peer_auth_chunks)) { 8046 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8047 } else 8048 omtu = 0; 8049 /* Here we do NOT factor the r_mtu */ 8050 if ((chk->send_size < (int)(mtu - omtu)) || 8051 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 8052 /* 8053 * We probably should glom the mbuf chain 8054 * from the chk->data for control but the 8055 * problem is it becomes yet one more level 8056 * of tracking to do if for some reason 8057 * output fails. Then I have got to 8058 * reconstruct the merged control chain.. el 8059 * yucko.. for now we take the easy way and 8060 * do the copy 8061 */ 8062 /* 8063 * Add an AUTH chunk, if chunk requires it 8064 * save the offset into the chain for AUTH 8065 */ 8066 if ((auth == NULL) && 8067 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8068 stcb->asoc.peer_auth_chunks))) { 8069 outchain = sctp_add_auth_chunk(outchain, 8070 &endoutchain, 8071 &auth, 8072 &auth_offset, 8073 stcb, 8074 chk->rec.chunk_id.id); 8075 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8076 } 8077 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 8078 (int)chk->rec.chunk_id.can_take_data, 8079 chk->send_size, chk->copy_by_ref); 8080 if (outchain == NULL) { 8081 *reason_code = 8; 8082 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8083 return (ENOMEM); 8084 } 8085 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8086 /* update our MTU size */ 8087 if (mtu > (chk->send_size + omtu)) 8088 mtu -= (chk->send_size + omtu); 8089 else 8090 mtu = 0; 8091 to_out += (chk->send_size + omtu); 8092 /* Do clear IP_DF ? */ 8093 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8094 no_fragmentflg = 0; 8095 } 8096 if (chk->rec.chunk_id.can_take_data) 8097 chk->data = NULL; 8098 /* 8099 * set hb flag since we can use these for 8100 * RTO 8101 */ 8102 hbflag = 1; 8103 asconf = 1; 8104 /* 8105 * should sysctl this: don't bundle data 8106 * with ASCONF since it requires AUTH 8107 */ 8108 no_data_chunks = 1; 8109 chk->sent = SCTP_DATAGRAM_SENT; 8110 if (chk->whoTo == NULL) { 8111 chk->whoTo = net; 8112 atomic_add_int(&net->ref_count, 1); 8113 } 8114 chk->snd_count++; 8115 if (mtu == 0) { 8116 /* 8117 * Ok we are out of room but we can 8118 * output without effecting the 8119 * flight size since this little guy 8120 * is a control only packet. 8121 */ 8122 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 8123 /* 8124 * do NOT clear the asconf flag as 8125 * it is used to do appropriate 8126 * source address selection. 8127 */ 8128 if (*now_filled == 0) { 8129 (void)SCTP_GETTIME_TIMEVAL(now); 8130 *now_filled = 1; 8131 } 8132 net->last_sent_time = *now; 8133 hbflag = 0; 8134 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 8135 (struct sockaddr *)&net->ro._l_addr, 8136 outchain, auth_offset, auth, 8137 stcb->asoc.authinfo.active_keyid, 8138 no_fragmentflg, 0, asconf, 8139 inp->sctp_lport, stcb->rport, 8140 htonl(stcb->asoc.peer_vtag), 8141 net->port, NULL, 8142 0, 0, 8143 so_locked))) { 8144 /* 8145 * error, we could not 8146 * output 8147 */ 8148 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error); 8149 if (from_where == 0) { 8150 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8151 } 8152 if (error == ENOBUFS) { 8153 asoc->ifp_had_enobuf = 1; 8154 SCTP_STAT_INCR(sctps_lowlevelerr); 8155 } 8156 /* error, could not output */ 8157 if (error == EHOSTUNREACH) { 8158 /* 8159 * Destination went 8160 * unreachable 8161 * during this send 8162 */ 8163 sctp_move_chunks_from_net(stcb, net); 8164 } 8165 *reason_code = 7; 8166 break; 8167 } else { 8168 asoc->ifp_had_enobuf = 0; 8169 } 8170 /* 8171 * increase the number we sent, if a 8172 * cookie is sent we don't tell them 8173 * any was sent out. 8174 */ 8175 outchain = endoutchain = NULL; 8176 auth = NULL; 8177 auth_offset = 0; 8178 if (!no_out_cnt) 8179 *num_out += ctl_cnt; 8180 /* recalc a clean slate and setup */ 8181 switch (net->ro._l_addr.sa.sa_family) { 8182 #ifdef INET 8183 case AF_INET: 8184 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8185 break; 8186 #endif 8187 #ifdef INET6 8188 case AF_INET6: 8189 mtu = net->mtu - SCTP_MIN_OVERHEAD; 8190 break; 8191 #endif 8192 default: 8193 /* TSNH */ 8194 mtu = net->mtu; 8195 break; 8196 } 8197 to_out = 0; 8198 no_fragmentflg = 1; 8199 } 8200 } 8201 } 8202 if (error != 0) { 8203 /* try next net */ 8204 continue; 8205 } 8206 /************************/ 8207 /* Control transmission */ 8208 /************************/ 8209 /* Now first lets go through the control queue */ 8210 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 8211 if ((sack_goes_to) && 8212 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) && 8213 (chk->whoTo != sack_goes_to)) { 8214 /* 8215 * if we have a sack in queue, and we are 8216 * looking at an ecn echo that is NOT queued 8217 * to where the sack is going.. 8218 */ 8219 if (chk->whoTo == net) { 8220 /* 8221 * Don't transmit it to where its 8222 * going (current net) 8223 */ 8224 continue; 8225 } else if (sack_goes_to == net) { 8226 /* 8227 * But do transmit it to this 8228 * address 8229 */ 8230 goto skip_net_check; 8231 } 8232 } 8233 if (chk->whoTo == NULL) { 8234 if (asoc->alternate == NULL) { 8235 if (asoc->primary_destination != net) { 8236 continue; 8237 } 8238 } else { 8239 if (asoc->alternate != net) { 8240 continue; 8241 } 8242 } 8243 } else { 8244 if (chk->whoTo != net) { 8245 continue; 8246 } 8247 } 8248 skip_net_check: 8249 if (chk->data == NULL) { 8250 continue; 8251 } 8252 if (chk->sent != SCTP_DATAGRAM_UNSENT) { 8253 /* 8254 * It must be unsent. Cookies and ASCONF's 8255 * hang around but there timers will force 8256 * when marked for resend. 8257 */ 8258 continue; 8259 } 8260 /* 8261 * if no AUTH is yet included and this chunk 8262 * requires it, make sure to account for it. We 8263 * don't apply the size until the AUTH chunk is 8264 * actually added below in case there is no room for 8265 * this chunk. NOTE: we overload the use of "omtu" 8266 * here 8267 */ 8268 if ((auth == NULL) && 8269 sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8270 stcb->asoc.peer_auth_chunks)) { 8271 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8272 } else 8273 omtu = 0; 8274 /* Here we do NOT factor the r_mtu */ 8275 if ((chk->send_size <= (int)(mtu - omtu)) || 8276 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 8277 /* 8278 * We probably should glom the mbuf chain 8279 * from the chk->data for control but the 8280 * problem is it becomes yet one more level 8281 * of tracking to do if for some reason 8282 * output fails. Then I have got to 8283 * reconstruct the merged control chain.. el 8284 * yucko.. for now we take the easy way and 8285 * do the copy 8286 */ 8287 /* 8288 * Add an AUTH chunk, if chunk requires it 8289 * save the offset into the chain for AUTH 8290 */ 8291 if ((auth == NULL) && 8292 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8293 stcb->asoc.peer_auth_chunks))) { 8294 outchain = sctp_add_auth_chunk(outchain, 8295 &endoutchain, 8296 &auth, 8297 &auth_offset, 8298 stcb, 8299 chk->rec.chunk_id.id); 8300 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8301 } 8302 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 8303 (int)chk->rec.chunk_id.can_take_data, 8304 chk->send_size, chk->copy_by_ref); 8305 if (outchain == NULL) { 8306 *reason_code = 8; 8307 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8308 return (ENOMEM); 8309 } 8310 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8311 /* update our MTU size */ 8312 if (mtu > (chk->send_size + omtu)) 8313 mtu -= (chk->send_size + omtu); 8314 else 8315 mtu = 0; 8316 to_out += (chk->send_size + omtu); 8317 /* Do clear IP_DF ? */ 8318 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8319 no_fragmentflg = 0; 8320 } 8321 if (chk->rec.chunk_id.can_take_data) 8322 chk->data = NULL; 8323 /* Mark things to be removed, if needed */ 8324 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 8325 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ 8326 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 8327 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 8328 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 8329 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 8330 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 8331 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 8332 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 8333 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 8334 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 8335 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) { 8336 hbflag = 1; 8337 } 8338 /* remove these chunks at the end */ 8339 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 8340 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { 8341 /* turn off the timer */ 8342 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 8343 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 8344 inp, stcb, net, 8345 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1); 8346 } 8347 } 8348 ctl_cnt++; 8349 } else { 8350 /* 8351 * Other chunks, since they have 8352 * timers running (i.e. COOKIE) we 8353 * just "trust" that it gets sent or 8354 * retransmitted. 8355 */ 8356 ctl_cnt++; 8357 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 8358 cookie = 1; 8359 no_out_cnt = 1; 8360 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 8361 /* 8362 * Increment ecne send count 8363 * here this means we may be 8364 * over-zealous in our 8365 * counting if the send 8366 * fails, but its the best 8367 * place to do it (we used 8368 * to do it in the queue of 8369 * the chunk, but that did 8370 * not tell how many times 8371 * it was sent. 8372 */ 8373 SCTP_STAT_INCR(sctps_sendecne); 8374 } 8375 chk->sent = SCTP_DATAGRAM_SENT; 8376 if (chk->whoTo == NULL) { 8377 chk->whoTo = net; 8378 atomic_add_int(&net->ref_count, 1); 8379 } 8380 chk->snd_count++; 8381 } 8382 if (mtu == 0) { 8383 /* 8384 * Ok we are out of room but we can 8385 * output without effecting the 8386 * flight size since this little guy 8387 * is a control only packet. 8388 */ 8389 if (asconf) { 8390 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 8391 /* 8392 * do NOT clear the asconf 8393 * flag as it is used to do 8394 * appropriate source 8395 * address selection. 8396 */ 8397 } 8398 if (cookie) { 8399 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 8400 cookie = 0; 8401 } 8402 /* Only HB or ASCONF advances time */ 8403 if (hbflag) { 8404 if (*now_filled == 0) { 8405 (void)SCTP_GETTIME_TIMEVAL(now); 8406 *now_filled = 1; 8407 } 8408 net->last_sent_time = *now; 8409 hbflag = 0; 8410 } 8411 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 8412 (struct sockaddr *)&net->ro._l_addr, 8413 outchain, 8414 auth_offset, auth, 8415 stcb->asoc.authinfo.active_keyid, 8416 no_fragmentflg, 0, asconf, 8417 inp->sctp_lport, stcb->rport, 8418 htonl(stcb->asoc.peer_vtag), 8419 net->port, NULL, 8420 0, 0, 8421 so_locked))) { 8422 /* 8423 * error, we could not 8424 * output 8425 */ 8426 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error); 8427 if (from_where == 0) { 8428 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8429 } 8430 if (error == ENOBUFS) { 8431 asoc->ifp_had_enobuf = 1; 8432 SCTP_STAT_INCR(sctps_lowlevelerr); 8433 } 8434 if (error == EHOSTUNREACH) { 8435 /* 8436 * Destination went 8437 * unreachable 8438 * during this send 8439 */ 8440 sctp_move_chunks_from_net(stcb, net); 8441 } 8442 *reason_code = 7; 8443 break; 8444 } else { 8445 asoc->ifp_had_enobuf = 0; 8446 } 8447 /* 8448 * increase the number we sent, if a 8449 * cookie is sent we don't tell them 8450 * any was sent out. 8451 */ 8452 outchain = endoutchain = NULL; 8453 auth = NULL; 8454 auth_offset = 0; 8455 if (!no_out_cnt) 8456 *num_out += ctl_cnt; 8457 /* recalc a clean slate and setup */ 8458 switch (net->ro._l_addr.sa.sa_family) { 8459 #ifdef INET 8460 case AF_INET: 8461 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8462 break; 8463 #endif 8464 #ifdef INET6 8465 case AF_INET6: 8466 mtu = net->mtu - SCTP_MIN_OVERHEAD; 8467 break; 8468 #endif 8469 default: 8470 /* TSNH */ 8471 mtu = net->mtu; 8472 break; 8473 } 8474 to_out = 0; 8475 no_fragmentflg = 1; 8476 } 8477 } 8478 } 8479 if (error != 0) { 8480 /* try next net */ 8481 continue; 8482 } 8483 /* JRI: if dest is in PF state, do not send data to it */ 8484 if ((asoc->sctp_cmt_on_off > 0) && 8485 (net != stcb->asoc.alternate) && 8486 (net->dest_state & SCTP_ADDR_PF)) { 8487 goto no_data_fill; 8488 } 8489 if (net->flight_size >= net->cwnd) { 8490 goto no_data_fill; 8491 } 8492 if ((asoc->sctp_cmt_on_off > 0) && 8493 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) && 8494 (net->flight_size > max_rwnd_per_dest)) { 8495 goto no_data_fill; 8496 } 8497 /* 8498 * We need a specific accounting for the usage of the send 8499 * buffer. We also need to check the number of messages per 8500 * net. For now, this is better than nothing and it disabled 8501 * by default... 8502 */ 8503 if ((asoc->sctp_cmt_on_off > 0) && 8504 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) && 8505 (max_send_per_dest > 0) && 8506 (net->flight_size > max_send_per_dest)) { 8507 goto no_data_fill; 8508 } 8509 /*********************/ 8510 /* Data transmission */ 8511 /*********************/ 8512 /* 8513 * if AUTH for DATA is required and no AUTH has been added 8514 * yet, account for this in the mtu now... if no data can be 8515 * bundled, this adjustment won't matter anyways since the 8516 * packet will be going out... 8517 */ 8518 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, 8519 stcb->asoc.peer_auth_chunks); 8520 if (data_auth_reqd && (auth == NULL)) { 8521 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8522 } 8523 /* now lets add any data within the MTU constraints */ 8524 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { 8525 #ifdef INET 8526 case AF_INET: 8527 if (net->mtu > SCTP_MIN_V4_OVERHEAD) 8528 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8529 else 8530 omtu = 0; 8531 break; 8532 #endif 8533 #ifdef INET6 8534 case AF_INET6: 8535 if (net->mtu > SCTP_MIN_OVERHEAD) 8536 omtu = net->mtu - SCTP_MIN_OVERHEAD; 8537 else 8538 omtu = 0; 8539 break; 8540 #endif 8541 default: 8542 /* TSNH */ 8543 omtu = 0; 8544 break; 8545 } 8546 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 8547 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) && 8548 (skip_data_for_this_net == 0)) || 8549 (cookie)) { 8550 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 8551 if (no_data_chunks) { 8552 /* let only control go out */ 8553 *reason_code = 1; 8554 break; 8555 } 8556 if (net->flight_size >= net->cwnd) { 8557 /* skip this net, no room for data */ 8558 *reason_code = 2; 8559 break; 8560 } 8561 if ((chk->whoTo != NULL) && 8562 (chk->whoTo != net)) { 8563 /* Don't send the chunk on this net */ 8564 continue; 8565 } 8566 if (asoc->sctp_cmt_on_off == 0) { 8567 if ((asoc->alternate) && 8568 (asoc->alternate != net) && 8569 (chk->whoTo == NULL)) { 8570 continue; 8571 } else if ((net != asoc->primary_destination) && 8572 (asoc->alternate == NULL) && 8573 (chk->whoTo == NULL)) { 8574 continue; 8575 } 8576 } 8577 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) { 8578 /*- 8579 * strange, we have a chunk that is 8580 * to big for its destination and 8581 * yet no fragment ok flag. 8582 * Something went wrong when the 8583 * PMTU changed...we did not mark 8584 * this chunk for some reason?? I 8585 * will fix it here by letting IP 8586 * fragment it for now and printing 8587 * a warning. This really should not 8588 * happen ... 8589 */ 8590 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n", 8591 chk->send_size, mtu); 8592 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 8593 } 8594 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && 8595 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) { 8596 struct sctp_data_chunk *dchkh; 8597 8598 dchkh = mtod(chk->data, struct sctp_data_chunk *); 8599 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY; 8600 } 8601 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) || 8602 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) { 8603 /* ok we will add this one */ 8604 8605 /* 8606 * Add an AUTH chunk, if chunk 8607 * requires it, save the offset into 8608 * the chain for AUTH 8609 */ 8610 if (data_auth_reqd) { 8611 if (auth == NULL) { 8612 outchain = sctp_add_auth_chunk(outchain, 8613 &endoutchain, 8614 &auth, 8615 &auth_offset, 8616 stcb, 8617 SCTP_DATA); 8618 auth_keyid = chk->auth_keyid; 8619 override_ok = 0; 8620 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8621 } else if (override_ok) { 8622 /* 8623 * use this data's 8624 * keyid 8625 */ 8626 auth_keyid = chk->auth_keyid; 8627 override_ok = 0; 8628 } else if (auth_keyid != chk->auth_keyid) { 8629 /* 8630 * different keyid, 8631 * so done bundling 8632 */ 8633 break; 8634 } 8635 } 8636 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0, 8637 chk->send_size, chk->copy_by_ref); 8638 if (outchain == NULL) { 8639 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n"); 8640 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 8641 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8642 } 8643 *reason_code = 3; 8644 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8645 return (ENOMEM); 8646 } 8647 /* upate our MTU size */ 8648 /* Do clear IP_DF ? */ 8649 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8650 no_fragmentflg = 0; 8651 } 8652 /* unsigned subtraction of mtu */ 8653 if (mtu > chk->send_size) 8654 mtu -= chk->send_size; 8655 else 8656 mtu = 0; 8657 /* unsigned subtraction of r_mtu */ 8658 if (r_mtu > chk->send_size) 8659 r_mtu -= chk->send_size; 8660 else 8661 r_mtu = 0; 8662 8663 to_out += chk->send_size; 8664 if ((to_out > mx_mtu) && no_fragmentflg) { 8665 #ifdef INVARIANTS 8666 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out); 8667 #else 8668 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n", 8669 mx_mtu, to_out); 8670 #endif 8671 } 8672 chk->window_probe = 0; 8673 data_list[bundle_at++] = chk; 8674 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 8675 break; 8676 } 8677 if (chk->sent == SCTP_DATAGRAM_UNSENT) { 8678 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) { 8679 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks); 8680 } else { 8681 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks); 8682 } 8683 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) && 8684 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0)) 8685 /* 8686 * Count number of 8687 * user msg's that 8688 * were fragmented 8689 * we do this by 8690 * counting when we 8691 * see a LAST 8692 * fragment only. 8693 */ 8694 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs); 8695 } 8696 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) { 8697 if ((one_chunk) && (stcb->asoc.total_flight == 0)) { 8698 data_list[0]->window_probe = 1; 8699 net->window_probe = 1; 8700 } 8701 break; 8702 } 8703 } else { 8704 /* 8705 * Must be sent in order of the 8706 * TSN's (on a network) 8707 */ 8708 break; 8709 } 8710 } /* for (chunk gather loop for this net) */ 8711 } /* if asoc.state OPEN */ 8712 no_data_fill: 8713 /* Is there something to send for this destination? */ 8714 if (outchain) { 8715 /* We may need to start a control timer or two */ 8716 if (asconf) { 8717 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 8718 stcb, net); 8719 /* 8720 * do NOT clear the asconf flag as it is 8721 * used to do appropriate source address 8722 * selection. 8723 */ 8724 } 8725 if (cookie) { 8726 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 8727 cookie = 0; 8728 } 8729 /* must start a send timer if data is being sent */ 8730 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) { 8731 /* 8732 * no timer running on this destination 8733 * restart it. 8734 */ 8735 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8736 } 8737 if (bundle_at || hbflag) { 8738 /* For data/asconf and hb set time */ 8739 if (*now_filled == 0) { 8740 (void)SCTP_GETTIME_TIMEVAL(now); 8741 *now_filled = 1; 8742 } 8743 net->last_sent_time = *now; 8744 } 8745 /* Now send it, if there is anything to send :> */ 8746 if ((error = sctp_lowlevel_chunk_output(inp, 8747 stcb, 8748 net, 8749 (struct sockaddr *)&net->ro._l_addr, 8750 outchain, 8751 auth_offset, 8752 auth, 8753 auth_keyid, 8754 no_fragmentflg, 8755 bundle_at, 8756 asconf, 8757 inp->sctp_lport, stcb->rport, 8758 htonl(stcb->asoc.peer_vtag), 8759 net->port, NULL, 8760 0, 0, 8761 so_locked))) { 8762 /* error, we could not output */ 8763 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error); 8764 if (from_where == 0) { 8765 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8766 } 8767 if (error == ENOBUFS) { 8768 SCTP_STAT_INCR(sctps_lowlevelerr); 8769 asoc->ifp_had_enobuf = 1; 8770 } 8771 if (error == EHOSTUNREACH) { 8772 /* 8773 * Destination went unreachable 8774 * during this send 8775 */ 8776 sctp_move_chunks_from_net(stcb, net); 8777 } 8778 *reason_code = 6; 8779 /*- 8780 * I add this line to be paranoid. As far as 8781 * I can tell the continue, takes us back to 8782 * the top of the for, but just to make sure 8783 * I will reset these again here. 8784 */ 8785 ctl_cnt = bundle_at = 0; 8786 continue; /* This takes us back to the 8787 * for() for the nets. */ 8788 } else { 8789 asoc->ifp_had_enobuf = 0; 8790 } 8791 endoutchain = NULL; 8792 auth = NULL; 8793 auth_offset = 0; 8794 if (!no_out_cnt) { 8795 *num_out += (ctl_cnt + bundle_at); 8796 } 8797 if (bundle_at) { 8798 /* setup for a RTO measurement */ 8799 tsns_sent = data_list[0]->rec.data.TSN_seq; 8800 /* fill time if not already filled */ 8801 if (*now_filled == 0) { 8802 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); 8803 *now_filled = 1; 8804 *now = asoc->time_last_sent; 8805 } else { 8806 asoc->time_last_sent = *now; 8807 } 8808 if (net->rto_needed) { 8809 data_list[0]->do_rtt = 1; 8810 net->rto_needed = 0; 8811 } 8812 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at); 8813 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net); 8814 } 8815 if (one_chunk) { 8816 break; 8817 } 8818 } 8819 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 8820 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND); 8821 } 8822 } 8823 if (old_start_at == NULL) { 8824 old_start_at = start_at; 8825 start_at = TAILQ_FIRST(&asoc->nets); 8826 if (old_start_at) 8827 goto again_one_more_time; 8828 } 8829 /* 8830 * At the end there should be no NON timed chunks hanging on this 8831 * queue. 8832 */ 8833 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 8834 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND); 8835 } 8836 if ((*num_out == 0) && (*reason_code == 0)) { 8837 *reason_code = 4; 8838 } else { 8839 *reason_code = 5; 8840 } 8841 sctp_clean_up_ctl(stcb, asoc, so_locked); 8842 return (0); 8843 } 8844 8845 void 8846 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err) 8847 { 8848 /*- 8849 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of 8850 * the control chunk queue. 8851 */ 8852 struct sctp_chunkhdr *hdr; 8853 struct sctp_tmit_chunk *chk; 8854 struct mbuf *mat; 8855 8856 SCTP_TCB_LOCK_ASSERT(stcb); 8857 sctp_alloc_a_chunk(stcb, chk); 8858 if (chk == NULL) { 8859 /* no memory */ 8860 sctp_m_freem(op_err); 8861 return; 8862 } 8863 chk->copy_by_ref = 0; 8864 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT); 8865 if (op_err == NULL) { 8866 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 8867 return; 8868 } 8869 chk->send_size = 0; 8870 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) { 8871 chk->send_size += SCTP_BUF_LEN(mat); 8872 } 8873 chk->sent = SCTP_DATAGRAM_UNSENT; 8874 chk->snd_count = 0; 8875 chk->asoc = &stcb->asoc; 8876 chk->data = op_err; 8877 chk->whoTo = NULL; 8878 hdr = mtod(op_err, struct sctp_chunkhdr *); 8879 hdr->chunk_type = SCTP_OPERATION_ERROR; 8880 hdr->chunk_flags = 0; 8881 hdr->chunk_length = htons(chk->send_size); 8882 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, 8883 chk, 8884 sctp_next); 8885 chk->asoc->ctrl_queue_cnt++; 8886 } 8887 8888 int 8889 sctp_send_cookie_echo(struct mbuf *m, 8890 int offset, 8891 struct sctp_tcb *stcb, 8892 struct sctp_nets *net) 8893 { 8894 /*- 8895 * pull out the cookie and put it at the front of the control chunk 8896 * queue. 8897 */ 8898 int at; 8899 struct mbuf *cookie; 8900 struct sctp_paramhdr parm, *phdr; 8901 struct sctp_chunkhdr *hdr; 8902 struct sctp_tmit_chunk *chk; 8903 uint16_t ptype, plen; 8904 8905 SCTP_TCB_LOCK_ASSERT(stcb); 8906 /* First find the cookie in the param area */ 8907 cookie = NULL; 8908 at = offset + sizeof(struct sctp_init_chunk); 8909 for (;;) { 8910 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm)); 8911 if (phdr == NULL) { 8912 return (-3); 8913 } 8914 ptype = ntohs(phdr->param_type); 8915 plen = ntohs(phdr->param_length); 8916 if (ptype == SCTP_STATE_COOKIE) { 8917 int pad; 8918 8919 /* found the cookie */ 8920 if ((pad = (plen % 4))) { 8921 plen += 4 - pad; 8922 } 8923 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT); 8924 if (cookie == NULL) { 8925 /* No memory */ 8926 return (-2); 8927 } 8928 #ifdef SCTP_MBUF_LOGGING 8929 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 8930 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY); 8931 } 8932 #endif 8933 break; 8934 } 8935 at += SCTP_SIZE32(plen); 8936 } 8937 /* ok, we got the cookie lets change it into a cookie echo chunk */ 8938 /* first the change from param to cookie */ 8939 hdr = mtod(cookie, struct sctp_chunkhdr *); 8940 hdr->chunk_type = SCTP_COOKIE_ECHO; 8941 hdr->chunk_flags = 0; 8942 /* get the chunk stuff now and place it in the FRONT of the queue */ 8943 sctp_alloc_a_chunk(stcb, chk); 8944 if (chk == NULL) { 8945 /* no memory */ 8946 sctp_m_freem(cookie); 8947 return (-5); 8948 } 8949 chk->copy_by_ref = 0; 8950 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO; 8951 chk->rec.chunk_id.can_take_data = 0; 8952 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 8953 chk->send_size = plen; 8954 chk->sent = SCTP_DATAGRAM_UNSENT; 8955 chk->snd_count = 0; 8956 chk->asoc = &stcb->asoc; 8957 chk->data = cookie; 8958 chk->whoTo = net; 8959 atomic_add_int(&chk->whoTo->ref_count, 1); 8960 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next); 8961 chk->asoc->ctrl_queue_cnt++; 8962 return (0); 8963 } 8964 8965 void 8966 sctp_send_heartbeat_ack(struct sctp_tcb *stcb, 8967 struct mbuf *m, 8968 int offset, 8969 int chk_length, 8970 struct sctp_nets *net) 8971 { 8972 /* 8973 * take a HB request and make it into a HB ack and send it. 8974 */ 8975 struct mbuf *outchain; 8976 struct sctp_chunkhdr *chdr; 8977 struct sctp_tmit_chunk *chk; 8978 8979 8980 if (net == NULL) 8981 /* must have a net pointer */ 8982 return; 8983 8984 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT); 8985 if (outchain == NULL) { 8986 /* gak out of memory */ 8987 return; 8988 } 8989 #ifdef SCTP_MBUF_LOGGING 8990 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 8991 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY); 8992 } 8993 #endif 8994 chdr = mtod(outchain, struct sctp_chunkhdr *); 8995 chdr->chunk_type = SCTP_HEARTBEAT_ACK; 8996 chdr->chunk_flags = 0; 8997 if (chk_length % 4) { 8998 /* need pad */ 8999 uint32_t cpthis = 0; 9000 int padlen; 9001 9002 padlen = 4 - (chk_length % 4); 9003 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis); 9004 } 9005 sctp_alloc_a_chunk(stcb, chk); 9006 if (chk == NULL) { 9007 /* no memory */ 9008 sctp_m_freem(outchain); 9009 return; 9010 } 9011 chk->copy_by_ref = 0; 9012 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK; 9013 chk->rec.chunk_id.can_take_data = 1; 9014 chk->flags = 0; 9015 chk->send_size = chk_length; 9016 chk->sent = SCTP_DATAGRAM_UNSENT; 9017 chk->snd_count = 0; 9018 chk->asoc = &stcb->asoc; 9019 chk->data = outchain; 9020 chk->whoTo = net; 9021 atomic_add_int(&chk->whoTo->ref_count, 1); 9022 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9023 chk->asoc->ctrl_queue_cnt++; 9024 } 9025 9026 void 9027 sctp_send_cookie_ack(struct sctp_tcb *stcb) 9028 { 9029 /* formulate and queue a cookie-ack back to sender */ 9030 struct mbuf *cookie_ack; 9031 struct sctp_chunkhdr *hdr; 9032 struct sctp_tmit_chunk *chk; 9033 9034 SCTP_TCB_LOCK_ASSERT(stcb); 9035 9036 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER); 9037 if (cookie_ack == NULL) { 9038 /* no mbuf's */ 9039 return; 9040 } 9041 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD); 9042 sctp_alloc_a_chunk(stcb, chk); 9043 if (chk == NULL) { 9044 /* no memory */ 9045 sctp_m_freem(cookie_ack); 9046 return; 9047 } 9048 chk->copy_by_ref = 0; 9049 chk->rec.chunk_id.id = SCTP_COOKIE_ACK; 9050 chk->rec.chunk_id.can_take_data = 1; 9051 chk->flags = 0; 9052 chk->send_size = sizeof(struct sctp_chunkhdr); 9053 chk->sent = SCTP_DATAGRAM_UNSENT; 9054 chk->snd_count = 0; 9055 chk->asoc = &stcb->asoc; 9056 chk->data = cookie_ack; 9057 if (chk->asoc->last_control_chunk_from != NULL) { 9058 chk->whoTo = chk->asoc->last_control_chunk_from; 9059 atomic_add_int(&chk->whoTo->ref_count, 1); 9060 } else { 9061 chk->whoTo = NULL; 9062 } 9063 hdr = mtod(cookie_ack, struct sctp_chunkhdr *); 9064 hdr->chunk_type = SCTP_COOKIE_ACK; 9065 hdr->chunk_flags = 0; 9066 hdr->chunk_length = htons(chk->send_size); 9067 SCTP_BUF_LEN(cookie_ack) = chk->send_size; 9068 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9069 chk->asoc->ctrl_queue_cnt++; 9070 return; 9071 } 9072 9073 9074 void 9075 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net) 9076 { 9077 /* formulate and queue a SHUTDOWN-ACK back to the sender */ 9078 struct mbuf *m_shutdown_ack; 9079 struct sctp_shutdown_ack_chunk *ack_cp; 9080 struct sctp_tmit_chunk *chk; 9081 9082 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER); 9083 if (m_shutdown_ack == NULL) { 9084 /* no mbuf's */ 9085 return; 9086 } 9087 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD); 9088 sctp_alloc_a_chunk(stcb, chk); 9089 if (chk == NULL) { 9090 /* no memory */ 9091 sctp_m_freem(m_shutdown_ack); 9092 return; 9093 } 9094 chk->copy_by_ref = 0; 9095 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK; 9096 chk->rec.chunk_id.can_take_data = 1; 9097 chk->flags = 0; 9098 chk->send_size = sizeof(struct sctp_chunkhdr); 9099 chk->sent = SCTP_DATAGRAM_UNSENT; 9100 chk->snd_count = 0; 9101 chk->flags = 0; 9102 chk->asoc = &stcb->asoc; 9103 chk->data = m_shutdown_ack; 9104 chk->whoTo = net; 9105 if (chk->whoTo) { 9106 atomic_add_int(&chk->whoTo->ref_count, 1); 9107 } 9108 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *); 9109 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK; 9110 ack_cp->ch.chunk_flags = 0; 9111 ack_cp->ch.chunk_length = htons(chk->send_size); 9112 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size; 9113 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9114 chk->asoc->ctrl_queue_cnt++; 9115 return; 9116 } 9117 9118 void 9119 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net) 9120 { 9121 /* formulate and queue a SHUTDOWN to the sender */ 9122 struct mbuf *m_shutdown; 9123 struct sctp_shutdown_chunk *shutdown_cp; 9124 struct sctp_tmit_chunk *chk; 9125 9126 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER); 9127 if (m_shutdown == NULL) { 9128 /* no mbuf's */ 9129 return; 9130 } 9131 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD); 9132 sctp_alloc_a_chunk(stcb, chk); 9133 if (chk == NULL) { 9134 /* no memory */ 9135 sctp_m_freem(m_shutdown); 9136 return; 9137 } 9138 chk->copy_by_ref = 0; 9139 chk->rec.chunk_id.id = SCTP_SHUTDOWN; 9140 chk->rec.chunk_id.can_take_data = 1; 9141 chk->flags = 0; 9142 chk->send_size = sizeof(struct sctp_shutdown_chunk); 9143 chk->sent = SCTP_DATAGRAM_UNSENT; 9144 chk->snd_count = 0; 9145 chk->flags = 0; 9146 chk->asoc = &stcb->asoc; 9147 chk->data = m_shutdown; 9148 chk->whoTo = net; 9149 if (chk->whoTo) { 9150 atomic_add_int(&chk->whoTo->ref_count, 1); 9151 } 9152 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *); 9153 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN; 9154 shutdown_cp->ch.chunk_flags = 0; 9155 shutdown_cp->ch.chunk_length = htons(chk->send_size); 9156 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn); 9157 SCTP_BUF_LEN(m_shutdown) = chk->send_size; 9158 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9159 chk->asoc->ctrl_queue_cnt++; 9160 return; 9161 } 9162 9163 void 9164 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked) 9165 { 9166 /* 9167 * formulate and queue an ASCONF to the peer. ASCONF parameters 9168 * should be queued on the assoc queue. 9169 */ 9170 struct sctp_tmit_chunk *chk; 9171 struct mbuf *m_asconf; 9172 int len; 9173 9174 SCTP_TCB_LOCK_ASSERT(stcb); 9175 9176 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) && 9177 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) { 9178 /* can't send a new one if there is one in flight already */ 9179 return; 9180 } 9181 /* compose an ASCONF chunk, maximum length is PMTU */ 9182 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked); 9183 if (m_asconf == NULL) { 9184 return; 9185 } 9186 sctp_alloc_a_chunk(stcb, chk); 9187 if (chk == NULL) { 9188 /* no memory */ 9189 sctp_m_freem(m_asconf); 9190 return; 9191 } 9192 chk->copy_by_ref = 0; 9193 chk->rec.chunk_id.id = SCTP_ASCONF; 9194 chk->rec.chunk_id.can_take_data = 0; 9195 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 9196 chk->data = m_asconf; 9197 chk->send_size = len; 9198 chk->sent = SCTP_DATAGRAM_UNSENT; 9199 chk->snd_count = 0; 9200 chk->asoc = &stcb->asoc; 9201 chk->whoTo = net; 9202 if (chk->whoTo) { 9203 atomic_add_int(&chk->whoTo->ref_count, 1); 9204 } 9205 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next); 9206 chk->asoc->ctrl_queue_cnt++; 9207 return; 9208 } 9209 9210 void 9211 sctp_send_asconf_ack(struct sctp_tcb *stcb) 9212 { 9213 /* 9214 * formulate and queue a asconf-ack back to sender. the asconf-ack 9215 * must be stored in the tcb. 9216 */ 9217 struct sctp_tmit_chunk *chk; 9218 struct sctp_asconf_ack *ack, *latest_ack; 9219 struct mbuf *m_ack; 9220 struct sctp_nets *net = NULL; 9221 9222 SCTP_TCB_LOCK_ASSERT(stcb); 9223 /* Get the latest ASCONF-ACK */ 9224 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead); 9225 if (latest_ack == NULL) { 9226 return; 9227 } 9228 if (latest_ack->last_sent_to != NULL && 9229 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) { 9230 /* we're doing a retransmission */ 9231 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0); 9232 if (net == NULL) { 9233 /* no alternate */ 9234 if (stcb->asoc.last_control_chunk_from == NULL) { 9235 if (stcb->asoc.alternate) { 9236 net = stcb->asoc.alternate; 9237 } else { 9238 net = stcb->asoc.primary_destination; 9239 } 9240 } else { 9241 net = stcb->asoc.last_control_chunk_from; 9242 } 9243 } 9244 } else { 9245 /* normal case */ 9246 if (stcb->asoc.last_control_chunk_from == NULL) { 9247 if (stcb->asoc.alternate) { 9248 net = stcb->asoc.alternate; 9249 } else { 9250 net = stcb->asoc.primary_destination; 9251 } 9252 } else { 9253 net = stcb->asoc.last_control_chunk_from; 9254 } 9255 } 9256 latest_ack->last_sent_to = net; 9257 9258 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) { 9259 if (ack->data == NULL) { 9260 continue; 9261 } 9262 /* copy the asconf_ack */ 9263 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT); 9264 if (m_ack == NULL) { 9265 /* couldn't copy it */ 9266 return; 9267 } 9268 #ifdef SCTP_MBUF_LOGGING 9269 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 9270 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY); 9271 } 9272 #endif 9273 9274 sctp_alloc_a_chunk(stcb, chk); 9275 if (chk == NULL) { 9276 /* no memory */ 9277 if (m_ack) 9278 sctp_m_freem(m_ack); 9279 return; 9280 } 9281 chk->copy_by_ref = 0; 9282 chk->rec.chunk_id.id = SCTP_ASCONF_ACK; 9283 chk->rec.chunk_id.can_take_data = 1; 9284 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 9285 chk->whoTo = net; 9286 if (chk->whoTo) { 9287 atomic_add_int(&chk->whoTo->ref_count, 1); 9288 } 9289 chk->data = m_ack; 9290 chk->send_size = ack->len; 9291 chk->sent = SCTP_DATAGRAM_UNSENT; 9292 chk->snd_count = 0; 9293 chk->asoc = &stcb->asoc; 9294 9295 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9296 chk->asoc->ctrl_queue_cnt++; 9297 } 9298 return; 9299 } 9300 9301 9302 static int 9303 sctp_chunk_retransmission(struct sctp_inpcb *inp, 9304 struct sctp_tcb *stcb, 9305 struct sctp_association *asoc, 9306 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked 9307 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 9308 SCTP_UNUSED 9309 #endif 9310 ) 9311 { 9312 /*- 9313 * send out one MTU of retransmission. If fast_retransmit is 9314 * happening we ignore the cwnd. Otherwise we obey the cwnd and 9315 * rwnd. For a Cookie or Asconf in the control chunk queue we 9316 * retransmit them by themselves. 9317 * 9318 * For data chunks we will pick out the lowest TSN's in the sent_queue 9319 * marked for resend and bundle them all together (up to a MTU of 9320 * destination). The address to send to should have been 9321 * selected/changed where the retransmission was marked (i.e. in FR 9322 * or t3-timeout routines). 9323 */ 9324 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 9325 struct sctp_tmit_chunk *chk, *fwd; 9326 struct mbuf *m, *endofchain; 9327 struct sctp_nets *net = NULL; 9328 uint32_t tsns_sent = 0; 9329 int no_fragmentflg, bundle_at, cnt_thru; 9330 unsigned int mtu; 9331 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started; 9332 struct sctp_auth_chunk *auth = NULL; 9333 uint32_t auth_offset = 0; 9334 uint16_t auth_keyid; 9335 int override_ok = 1; 9336 int data_auth_reqd = 0; 9337 uint32_t dmtu = 0; 9338 9339 SCTP_TCB_LOCK_ASSERT(stcb); 9340 tmr_started = ctl_cnt = bundle_at = error = 0; 9341 no_fragmentflg = 1; 9342 fwd_tsn = 0; 9343 *cnt_out = 0; 9344 fwd = NULL; 9345 endofchain = m = NULL; 9346 auth_keyid = stcb->asoc.authinfo.active_keyid; 9347 #ifdef SCTP_AUDITING_ENABLED 9348 sctp_audit_log(0xC3, 1); 9349 #endif 9350 if ((TAILQ_EMPTY(&asoc->sent_queue)) && 9351 (TAILQ_EMPTY(&asoc->control_send_queue))) { 9352 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n", 9353 asoc->sent_queue_retran_cnt); 9354 asoc->sent_queue_cnt = 0; 9355 asoc->sent_queue_cnt_removeable = 0; 9356 /* send back 0/0 so we enter normal transmission */ 9357 *cnt_out = 0; 9358 return (0); 9359 } 9360 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 9361 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) || 9362 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) || 9363 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) { 9364 if (chk->sent != SCTP_DATAGRAM_RESEND) { 9365 continue; 9366 } 9367 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 9368 if (chk != asoc->str_reset) { 9369 /* 9370 * not eligible for retran if its 9371 * not ours 9372 */ 9373 continue; 9374 } 9375 } 9376 ctl_cnt++; 9377 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 9378 fwd_tsn = 1; 9379 } 9380 /* 9381 * Add an AUTH chunk, if chunk requires it save the 9382 * offset into the chain for AUTH 9383 */ 9384 if ((auth == NULL) && 9385 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 9386 stcb->asoc.peer_auth_chunks))) { 9387 m = sctp_add_auth_chunk(m, &endofchain, 9388 &auth, &auth_offset, 9389 stcb, 9390 chk->rec.chunk_id.id); 9391 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9392 } 9393 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 9394 break; 9395 } 9396 } 9397 one_chunk = 0; 9398 cnt_thru = 0; 9399 /* do we have control chunks to retransmit? */ 9400 if (m != NULL) { 9401 /* Start a timer no matter if we suceed or fail */ 9402 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 9403 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo); 9404 } else if (chk->rec.chunk_id.id == SCTP_ASCONF) 9405 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo); 9406 chk->snd_count++; /* update our count */ 9407 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo, 9408 (struct sockaddr *)&chk->whoTo->ro._l_addr, m, 9409 auth_offset, auth, stcb->asoc.authinfo.active_keyid, 9410 no_fragmentflg, 0, 0, 9411 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), 9412 chk->whoTo->port, NULL, 9413 0, 0, 9414 so_locked))) { 9415 SCTP_STAT_INCR(sctps_lowlevelerr); 9416 return (error); 9417 } 9418 endofchain = NULL; 9419 auth = NULL; 9420 auth_offset = 0; 9421 /* 9422 * We don't want to mark the net->sent time here since this 9423 * we use this for HB and retrans cannot measure RTT 9424 */ 9425 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */ 9426 *cnt_out += 1; 9427 chk->sent = SCTP_DATAGRAM_SENT; 9428 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt); 9429 if (fwd_tsn == 0) { 9430 return (0); 9431 } else { 9432 /* Clean up the fwd-tsn list */ 9433 sctp_clean_up_ctl(stcb, asoc, so_locked); 9434 return (0); 9435 } 9436 } 9437 /* 9438 * Ok, it is just data retransmission we need to do or that and a 9439 * fwd-tsn with it all. 9440 */ 9441 if (TAILQ_EMPTY(&asoc->sent_queue)) { 9442 return (SCTP_RETRAN_DONE); 9443 } 9444 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) || 9445 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) { 9446 /* not yet open, resend the cookie and that is it */ 9447 return (1); 9448 } 9449 #ifdef SCTP_AUDITING_ENABLED 9450 sctp_auditing(20, inp, stcb, NULL); 9451 #endif 9452 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks); 9453 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 9454 if (chk->sent != SCTP_DATAGRAM_RESEND) { 9455 /* No, not sent to this net or not ready for rtx */ 9456 continue; 9457 } 9458 if (chk->data == NULL) { 9459 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n", 9460 chk->rec.data.TSN_seq, chk->snd_count, chk->sent); 9461 continue; 9462 } 9463 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) && 9464 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) { 9465 /* Gak, we have exceeded max unlucky retran, abort! */ 9466 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n", 9467 chk->snd_count, 9468 SCTP_BASE_SYSCTL(sctp_max_retran_chunk)); 9469 atomic_add_int(&stcb->asoc.refcnt, 1); 9470 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked); 9471 SCTP_TCB_LOCK(stcb); 9472 atomic_subtract_int(&stcb->asoc.refcnt, 1); 9473 return (SCTP_RETRAN_EXIT); 9474 } 9475 /* pick up the net */ 9476 net = chk->whoTo; 9477 switch (net->ro._l_addr.sa.sa_family) { 9478 #ifdef INET 9479 case AF_INET: 9480 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 9481 break; 9482 #endif 9483 #ifdef INET6 9484 case AF_INET6: 9485 mtu = net->mtu - SCTP_MIN_OVERHEAD; 9486 break; 9487 #endif 9488 default: 9489 /* TSNH */ 9490 mtu = net->mtu; 9491 break; 9492 } 9493 9494 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) { 9495 /* No room in peers rwnd */ 9496 uint32_t tsn; 9497 9498 tsn = asoc->last_acked_seq + 1; 9499 if (tsn == chk->rec.data.TSN_seq) { 9500 /* 9501 * we make a special exception for this 9502 * case. The peer has no rwnd but is missing 9503 * the lowest chunk.. which is probably what 9504 * is holding up the rwnd. 9505 */ 9506 goto one_chunk_around; 9507 } 9508 return (1); 9509 } 9510 one_chunk_around: 9511 if (asoc->peers_rwnd < mtu) { 9512 one_chunk = 1; 9513 if ((asoc->peers_rwnd == 0) && 9514 (asoc->total_flight == 0)) { 9515 chk->window_probe = 1; 9516 chk->whoTo->window_probe = 1; 9517 } 9518 } 9519 #ifdef SCTP_AUDITING_ENABLED 9520 sctp_audit_log(0xC3, 2); 9521 #endif 9522 bundle_at = 0; 9523 m = NULL; 9524 net->fast_retran_ip = 0; 9525 if (chk->rec.data.doing_fast_retransmit == 0) { 9526 /* 9527 * if no FR in progress skip destination that have 9528 * flight_size > cwnd. 9529 */ 9530 if (net->flight_size >= net->cwnd) { 9531 continue; 9532 } 9533 } else { 9534 /* 9535 * Mark the destination net to have FR recovery 9536 * limits put on it. 9537 */ 9538 *fr_done = 1; 9539 net->fast_retran_ip = 1; 9540 } 9541 9542 /* 9543 * if no AUTH is yet included and this chunk requires it, 9544 * make sure to account for it. We don't apply the size 9545 * until the AUTH chunk is actually added below in case 9546 * there is no room for this chunk. 9547 */ 9548 if (data_auth_reqd && (auth == NULL)) { 9549 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 9550 } else 9551 dmtu = 0; 9552 9553 if ((chk->send_size <= (mtu - dmtu)) || 9554 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 9555 /* ok we will add this one */ 9556 if (data_auth_reqd) { 9557 if (auth == NULL) { 9558 m = sctp_add_auth_chunk(m, 9559 &endofchain, 9560 &auth, 9561 &auth_offset, 9562 stcb, 9563 SCTP_DATA); 9564 auth_keyid = chk->auth_keyid; 9565 override_ok = 0; 9566 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9567 } else if (override_ok) { 9568 auth_keyid = chk->auth_keyid; 9569 override_ok = 0; 9570 } else if (chk->auth_keyid != auth_keyid) { 9571 /* different keyid, so done bundling */ 9572 break; 9573 } 9574 } 9575 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 9576 if (m == NULL) { 9577 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 9578 return (ENOMEM); 9579 } 9580 /* Do clear IP_DF ? */ 9581 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 9582 no_fragmentflg = 0; 9583 } 9584 /* upate our MTU size */ 9585 if (mtu > (chk->send_size + dmtu)) 9586 mtu -= (chk->send_size + dmtu); 9587 else 9588 mtu = 0; 9589 data_list[bundle_at++] = chk; 9590 if (one_chunk && (asoc->total_flight <= 0)) { 9591 SCTP_STAT_INCR(sctps_windowprobed); 9592 } 9593 } 9594 if (one_chunk == 0) { 9595 /* 9596 * now are there anymore forward from chk to pick 9597 * up? 9598 */ 9599 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) { 9600 if (fwd->sent != SCTP_DATAGRAM_RESEND) { 9601 /* Nope, not for retran */ 9602 continue; 9603 } 9604 if (fwd->whoTo != net) { 9605 /* Nope, not the net in question */ 9606 continue; 9607 } 9608 if (data_auth_reqd && (auth == NULL)) { 9609 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 9610 } else 9611 dmtu = 0; 9612 if (fwd->send_size <= (mtu - dmtu)) { 9613 if (data_auth_reqd) { 9614 if (auth == NULL) { 9615 m = sctp_add_auth_chunk(m, 9616 &endofchain, 9617 &auth, 9618 &auth_offset, 9619 stcb, 9620 SCTP_DATA); 9621 auth_keyid = fwd->auth_keyid; 9622 override_ok = 0; 9623 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9624 } else if (override_ok) { 9625 auth_keyid = fwd->auth_keyid; 9626 override_ok = 0; 9627 } else if (fwd->auth_keyid != auth_keyid) { 9628 /* 9629 * different keyid, 9630 * so done bundling 9631 */ 9632 break; 9633 } 9634 } 9635 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref); 9636 if (m == NULL) { 9637 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 9638 return (ENOMEM); 9639 } 9640 /* Do clear IP_DF ? */ 9641 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) { 9642 no_fragmentflg = 0; 9643 } 9644 /* upate our MTU size */ 9645 if (mtu > (fwd->send_size + dmtu)) 9646 mtu -= (fwd->send_size + dmtu); 9647 else 9648 mtu = 0; 9649 data_list[bundle_at++] = fwd; 9650 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 9651 break; 9652 } 9653 } else { 9654 /* can't fit so we are done */ 9655 break; 9656 } 9657 } 9658 } 9659 /* Is there something to send for this destination? */ 9660 if (m) { 9661 /* 9662 * No matter if we fail/or suceed we should start a 9663 * timer. A failure is like a lost IP packet :-) 9664 */ 9665 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 9666 /* 9667 * no timer running on this destination 9668 * restart it. 9669 */ 9670 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 9671 tmr_started = 1; 9672 } 9673 /* Now lets send it, if there is anything to send :> */ 9674 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 9675 (struct sockaddr *)&net->ro._l_addr, m, 9676 auth_offset, auth, auth_keyid, 9677 no_fragmentflg, 0, 0, 9678 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), 9679 net->port, NULL, 9680 0, 0, 9681 so_locked))) { 9682 /* error, we could not output */ 9683 SCTP_STAT_INCR(sctps_lowlevelerr); 9684 return (error); 9685 } 9686 endofchain = NULL; 9687 auth = NULL; 9688 auth_offset = 0; 9689 /* For HB's */ 9690 /* 9691 * We don't want to mark the net->sent time here 9692 * since this we use this for HB and retrans cannot 9693 * measure RTT 9694 */ 9695 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */ 9696 9697 /* For auto-close */ 9698 cnt_thru++; 9699 if (*now_filled == 0) { 9700 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); 9701 *now = asoc->time_last_sent; 9702 *now_filled = 1; 9703 } else { 9704 asoc->time_last_sent = *now; 9705 } 9706 *cnt_out += bundle_at; 9707 #ifdef SCTP_AUDITING_ENABLED 9708 sctp_audit_log(0xC4, bundle_at); 9709 #endif 9710 if (bundle_at) { 9711 tsns_sent = data_list[0]->rec.data.TSN_seq; 9712 } 9713 for (i = 0; i < bundle_at; i++) { 9714 SCTP_STAT_INCR(sctps_sendretransdata); 9715 data_list[i]->sent = SCTP_DATAGRAM_SENT; 9716 /* 9717 * When we have a revoked data, and we 9718 * retransmit it, then we clear the revoked 9719 * flag since this flag dictates if we 9720 * subtracted from the fs 9721 */ 9722 if (data_list[i]->rec.data.chunk_was_revoked) { 9723 /* Deflate the cwnd */ 9724 data_list[i]->whoTo->cwnd -= data_list[i]->book_size; 9725 data_list[i]->rec.data.chunk_was_revoked = 0; 9726 } 9727 data_list[i]->snd_count++; 9728 sctp_ucount_decr(asoc->sent_queue_retran_cnt); 9729 /* record the time */ 9730 data_list[i]->sent_rcv_time = asoc->time_last_sent; 9731 if (data_list[i]->book_size_scale) { 9732 /* 9733 * need to double the book size on 9734 * this one 9735 */ 9736 data_list[i]->book_size_scale = 0; 9737 /* 9738 * Since we double the booksize, we 9739 * must also double the output queue 9740 * size, since this get shrunk when 9741 * we free by this amount. 9742 */ 9743 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size); 9744 data_list[i]->book_size *= 2; 9745 9746 9747 } else { 9748 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { 9749 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 9750 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); 9751 } 9752 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 9753 (uint32_t) (data_list[i]->send_size + 9754 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); 9755 } 9756 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 9757 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND, 9758 data_list[i]->whoTo->flight_size, 9759 data_list[i]->book_size, 9760 (uintptr_t) data_list[i]->whoTo, 9761 data_list[i]->rec.data.TSN_seq); 9762 } 9763 sctp_flight_size_increase(data_list[i]); 9764 sctp_total_flight_increase(stcb, data_list[i]); 9765 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 9766 /* SWS sender side engages */ 9767 asoc->peers_rwnd = 0; 9768 } 9769 if ((i == 0) && 9770 (data_list[i]->rec.data.doing_fast_retransmit)) { 9771 SCTP_STAT_INCR(sctps_sendfastretrans); 9772 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) && 9773 (tmr_started == 0)) { 9774 /*- 9775 * ok we just fast-retrans'd 9776 * the lowest TSN, i.e the 9777 * first on the list. In 9778 * this case we want to give 9779 * some more time to get a 9780 * SACK back without a 9781 * t3-expiring. 9782 */ 9783 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net, 9784 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2); 9785 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 9786 } 9787 } 9788 } 9789 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 9790 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND); 9791 } 9792 #ifdef SCTP_AUDITING_ENABLED 9793 sctp_auditing(21, inp, stcb, NULL); 9794 #endif 9795 } else { 9796 /* None will fit */ 9797 return (1); 9798 } 9799 if (asoc->sent_queue_retran_cnt <= 0) { 9800 /* all done we have no more to retran */ 9801 asoc->sent_queue_retran_cnt = 0; 9802 break; 9803 } 9804 if (one_chunk) { 9805 /* No more room in rwnd */ 9806 return (1); 9807 } 9808 /* stop the for loop here. we sent out a packet */ 9809 break; 9810 } 9811 return (0); 9812 } 9813 9814 static void 9815 sctp_timer_validation(struct sctp_inpcb *inp, 9816 struct sctp_tcb *stcb, 9817 struct sctp_association *asoc) 9818 { 9819 struct sctp_nets *net; 9820 9821 /* Validate that a timer is running somewhere */ 9822 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 9823 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 9824 /* Here is a timer */ 9825 return; 9826 } 9827 } 9828 SCTP_TCB_LOCK_ASSERT(stcb); 9829 /* Gak, we did not have a timer somewhere */ 9830 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n"); 9831 if (asoc->alternate) { 9832 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate); 9833 } else { 9834 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination); 9835 } 9836 return; 9837 } 9838 9839 void 9840 sctp_chunk_output(struct sctp_inpcb *inp, 9841 struct sctp_tcb *stcb, 9842 int from_where, 9843 int so_locked 9844 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 9845 SCTP_UNUSED 9846 #endif 9847 ) 9848 { 9849 /*- 9850 * Ok this is the generic chunk service queue. we must do the 9851 * following: 9852 * - See if there are retransmits pending, if so we must 9853 * do these first. 9854 * - Service the stream queue that is next, moving any 9855 * message (note I must get a complete message i.e. 9856 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning 9857 * TSN's 9858 * - Check to see if the cwnd/rwnd allows any output, if so we 9859 * go ahead and fomulate and send the low level chunks. Making sure 9860 * to combine any control in the control chunk queue also. 9861 */ 9862 struct sctp_association *asoc; 9863 struct sctp_nets *net; 9864 int error = 0, num_out, tot_out = 0, ret = 0, reason_code; 9865 unsigned int burst_cnt = 0; 9866 struct timeval now; 9867 int now_filled = 0; 9868 int nagle_on; 9869 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 9870 int un_sent = 0; 9871 int fr_done; 9872 unsigned int tot_frs = 0; 9873 9874 asoc = &stcb->asoc; 9875 /* The Nagle algorithm is only applied when handling a send call. */ 9876 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) { 9877 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) { 9878 nagle_on = 0; 9879 } else { 9880 nagle_on = 1; 9881 } 9882 } else { 9883 nagle_on = 0; 9884 } 9885 SCTP_TCB_LOCK_ASSERT(stcb); 9886 9887 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); 9888 9889 if ((un_sent <= 0) && 9890 (TAILQ_EMPTY(&asoc->control_send_queue)) && 9891 (TAILQ_EMPTY(&asoc->asconf_send_queue)) && 9892 (asoc->sent_queue_retran_cnt == 0)) { 9893 /* Nothing to do unless there is something to be sent left */ 9894 return; 9895 } 9896 /* 9897 * Do we have something to send, data or control AND a sack timer 9898 * running, if so piggy-back the sack. 9899 */ 9900 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 9901 sctp_send_sack(stcb, so_locked); 9902 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 9903 } 9904 while (asoc->sent_queue_retran_cnt) { 9905 /*- 9906 * Ok, it is retransmission time only, we send out only ONE 9907 * packet with a single call off to the retran code. 9908 */ 9909 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) { 9910 /*- 9911 * Special hook for handling cookiess discarded 9912 * by peer that carried data. Send cookie-ack only 9913 * and then the next call with get the retran's. 9914 */ 9915 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 9916 from_where, 9917 &now, &now_filled, frag_point, so_locked); 9918 return; 9919 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) { 9920 /* if its not from a HB then do it */ 9921 fr_done = 0; 9922 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked); 9923 if (fr_done) { 9924 tot_frs++; 9925 } 9926 } else { 9927 /* 9928 * its from any other place, we don't allow retran 9929 * output (only control) 9930 */ 9931 ret = 1; 9932 } 9933 if (ret > 0) { 9934 /* Can't send anymore */ 9935 /*- 9936 * now lets push out control by calling med-level 9937 * output once. this assures that we WILL send HB's 9938 * if queued too. 9939 */ 9940 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 9941 from_where, 9942 &now, &now_filled, frag_point, so_locked); 9943 #ifdef SCTP_AUDITING_ENABLED 9944 sctp_auditing(8, inp, stcb, NULL); 9945 #endif 9946 sctp_timer_validation(inp, stcb, asoc); 9947 return; 9948 } 9949 if (ret < 0) { 9950 /*- 9951 * The count was off.. retran is not happening so do 9952 * the normal retransmission. 9953 */ 9954 #ifdef SCTP_AUDITING_ENABLED 9955 sctp_auditing(9, inp, stcb, NULL); 9956 #endif 9957 if (ret == SCTP_RETRAN_EXIT) { 9958 return; 9959 } 9960 break; 9961 } 9962 if (from_where == SCTP_OUTPUT_FROM_T3) { 9963 /* Only one transmission allowed out of a timeout */ 9964 #ifdef SCTP_AUDITING_ENABLED 9965 sctp_auditing(10, inp, stcb, NULL); 9966 #endif 9967 /* Push out any control */ 9968 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where, 9969 &now, &now_filled, frag_point, so_locked); 9970 return; 9971 } 9972 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) { 9973 /* Hit FR burst limit */ 9974 return; 9975 } 9976 if ((num_out == 0) && (ret == 0)) { 9977 /* No more retrans to send */ 9978 break; 9979 } 9980 } 9981 #ifdef SCTP_AUDITING_ENABLED 9982 sctp_auditing(12, inp, stcb, NULL); 9983 #endif 9984 /* Check for bad destinations, if they exist move chunks around. */ 9985 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 9986 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 9987 /*- 9988 * if possible move things off of this address we 9989 * still may send below due to the dormant state but 9990 * we try to find an alternate address to send to 9991 * and if we have one we move all queued data on the 9992 * out wheel to this alternate address. 9993 */ 9994 if (net->ref_count > 1) 9995 sctp_move_chunks_from_net(stcb, net); 9996 } else { 9997 /*- 9998 * if ((asoc->sat_network) || (net->addr_is_local)) 9999 * { burst_limit = asoc->max_burst * 10000 * SCTP_SAT_NETWORK_BURST_INCR; } 10001 */ 10002 if (asoc->max_burst > 0) { 10003 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) { 10004 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) { 10005 /* 10006 * JRS - Use the congestion 10007 * control given in the 10008 * congestion control module 10009 */ 10010 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst); 10011 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10012 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED); 10013 } 10014 SCTP_STAT_INCR(sctps_maxburstqueued); 10015 } 10016 net->fast_retran_ip = 0; 10017 } else { 10018 if (net->flight_size == 0) { 10019 /* 10020 * Should be decaying the 10021 * cwnd here 10022 */ 10023 ; 10024 } 10025 } 10026 } 10027 } 10028 10029 } 10030 burst_cnt = 0; 10031 do { 10032 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out, 10033 &reason_code, 0, from_where, 10034 &now, &now_filled, frag_point, so_locked); 10035 if (error) { 10036 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error); 10037 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10038 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP); 10039 } 10040 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10041 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES); 10042 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES); 10043 } 10044 break; 10045 } 10046 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out); 10047 10048 tot_out += num_out; 10049 burst_cnt++; 10050 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10051 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES); 10052 if (num_out == 0) { 10053 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES); 10054 } 10055 } 10056 if (nagle_on) { 10057 /* 10058 * When the Nagle algorithm is used, look at how 10059 * much is unsent, then if its smaller than an MTU 10060 * and we have data in flight we stop, except if we 10061 * are handling a fragmented user message. 10062 */ 10063 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 10064 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 10065 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) && 10066 (stcb->asoc.total_flight > 0) && 10067 ((stcb->asoc.locked_on_sending == NULL) || 10068 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { 10069 break; 10070 } 10071 } 10072 if (TAILQ_EMPTY(&asoc->control_send_queue) && 10073 TAILQ_EMPTY(&asoc->send_queue) && 10074 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { 10075 /* Nothing left to send */ 10076 break; 10077 } 10078 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) { 10079 /* Nothing left to send */ 10080 break; 10081 } 10082 } while (num_out && 10083 ((asoc->max_burst == 0) || 10084 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) || 10085 (burst_cnt < asoc->max_burst))); 10086 10087 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) { 10088 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) { 10089 SCTP_STAT_INCR(sctps_maxburstqueued); 10090 asoc->burst_limit_applied = 1; 10091 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10092 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED); 10093 } 10094 } else { 10095 asoc->burst_limit_applied = 0; 10096 } 10097 } 10098 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10099 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES); 10100 } 10101 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n", 10102 tot_out); 10103 10104 /*- 10105 * Now we need to clean up the control chunk chain if a ECNE is on 10106 * it. It must be marked as UNSENT again so next call will continue 10107 * to send it until such time that we get a CWR, to remove it. 10108 */ 10109 if (stcb->asoc.ecn_echo_cnt_onq) 10110 sctp_fix_ecn_echo(asoc); 10111 return; 10112 } 10113 10114 10115 int 10116 sctp_output( 10117 struct sctp_inpcb *inp, 10118 struct mbuf *m, 10119 struct sockaddr *addr, 10120 struct mbuf *control, 10121 struct thread *p, 10122 int flags) 10123 { 10124 if (inp == NULL) { 10125 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 10126 return (EINVAL); 10127 } 10128 if (inp->sctp_socket == NULL) { 10129 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 10130 return (EINVAL); 10131 } 10132 return (sctp_sosend(inp->sctp_socket, 10133 addr, 10134 (struct uio *)NULL, 10135 m, 10136 control, 10137 flags, p 10138 )); 10139 } 10140 10141 void 10142 send_forward_tsn(struct sctp_tcb *stcb, 10143 struct sctp_association *asoc) 10144 { 10145 struct sctp_tmit_chunk *chk; 10146 struct sctp_forward_tsn_chunk *fwdtsn; 10147 uint32_t advance_peer_ack_point; 10148 10149 SCTP_TCB_LOCK_ASSERT(stcb); 10150 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 10151 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 10152 /* mark it to unsent */ 10153 chk->sent = SCTP_DATAGRAM_UNSENT; 10154 chk->snd_count = 0; 10155 /* Do we correct its output location? */ 10156 if (chk->whoTo) { 10157 sctp_free_remote_addr(chk->whoTo); 10158 chk->whoTo = NULL; 10159 } 10160 goto sctp_fill_in_rest; 10161 } 10162 } 10163 /* Ok if we reach here we must build one */ 10164 sctp_alloc_a_chunk(stcb, chk); 10165 if (chk == NULL) { 10166 return; 10167 } 10168 asoc->fwd_tsn_cnt++; 10169 chk->copy_by_ref = 0; 10170 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN; 10171 chk->rec.chunk_id.can_take_data = 0; 10172 chk->flags = 0; 10173 chk->asoc = asoc; 10174 chk->whoTo = NULL; 10175 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 10176 if (chk->data == NULL) { 10177 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 10178 return; 10179 } 10180 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 10181 chk->sent = SCTP_DATAGRAM_UNSENT; 10182 chk->snd_count = 0; 10183 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next); 10184 asoc->ctrl_queue_cnt++; 10185 sctp_fill_in_rest: 10186 /*- 10187 * Here we go through and fill out the part that deals with 10188 * stream/seq of the ones we skip. 10189 */ 10190 SCTP_BUF_LEN(chk->data) = 0; 10191 { 10192 struct sctp_tmit_chunk *at, *tp1, *last; 10193 struct sctp_strseq *strseq; 10194 unsigned int cnt_of_space, i, ovh; 10195 unsigned int space_needed; 10196 unsigned int cnt_of_skipped = 0; 10197 10198 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) { 10199 if ((at->sent != SCTP_FORWARD_TSN_SKIP) && 10200 (at->sent != SCTP_DATAGRAM_NR_ACKED)) { 10201 /* no more to look at */ 10202 break; 10203 } 10204 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 10205 /* We don't report these */ 10206 continue; 10207 } 10208 cnt_of_skipped++; 10209 } 10210 space_needed = (sizeof(struct sctp_forward_tsn_chunk) + 10211 (cnt_of_skipped * sizeof(struct sctp_strseq))); 10212 10213 cnt_of_space = M_TRAILINGSPACE(chk->data); 10214 10215 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 10216 ovh = SCTP_MIN_OVERHEAD; 10217 } else { 10218 ovh = SCTP_MIN_V4_OVERHEAD; 10219 } 10220 if (cnt_of_space > (asoc->smallest_mtu - ovh)) { 10221 /* trim to a mtu size */ 10222 cnt_of_space = asoc->smallest_mtu - ovh; 10223 } 10224 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10225 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10226 0xff, 0, cnt_of_skipped, 10227 asoc->advanced_peer_ack_point); 10228 10229 } 10230 advance_peer_ack_point = asoc->advanced_peer_ack_point; 10231 if (cnt_of_space < space_needed) { 10232 /*- 10233 * ok we must trim down the chunk by lowering the 10234 * advance peer ack point. 10235 */ 10236 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10237 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10238 0xff, 0xff, cnt_of_space, 10239 space_needed); 10240 } 10241 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk); 10242 cnt_of_skipped /= sizeof(struct sctp_strseq); 10243 /*- 10244 * Go through and find the TSN that will be the one 10245 * we report. 10246 */ 10247 at = TAILQ_FIRST(&asoc->sent_queue); 10248 if (at != NULL) { 10249 for (i = 0; i < cnt_of_skipped; i++) { 10250 tp1 = TAILQ_NEXT(at, sctp_next); 10251 if (tp1 == NULL) { 10252 break; 10253 } 10254 at = tp1; 10255 } 10256 } 10257 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10258 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10259 0xff, cnt_of_skipped, at->rec.data.TSN_seq, 10260 asoc->advanced_peer_ack_point); 10261 } 10262 last = at; 10263 /*- 10264 * last now points to last one I can report, update 10265 * peer ack point 10266 */ 10267 if (last) 10268 advance_peer_ack_point = last->rec.data.TSN_seq; 10269 space_needed = sizeof(struct sctp_forward_tsn_chunk) + 10270 cnt_of_skipped * sizeof(struct sctp_strseq); 10271 } 10272 chk->send_size = space_needed; 10273 /* Setup the chunk */ 10274 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *); 10275 fwdtsn->ch.chunk_length = htons(chk->send_size); 10276 fwdtsn->ch.chunk_flags = 0; 10277 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN; 10278 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point); 10279 SCTP_BUF_LEN(chk->data) = chk->send_size; 10280 fwdtsn++; 10281 /*- 10282 * Move pointer to after the fwdtsn and transfer to the 10283 * strseq pointer. 10284 */ 10285 strseq = (struct sctp_strseq *)fwdtsn; 10286 /*- 10287 * Now populate the strseq list. This is done blindly 10288 * without pulling out duplicate stream info. This is 10289 * inefficent but won't harm the process since the peer will 10290 * look at these in sequence and will thus release anything. 10291 * It could mean we exceed the PMTU and chop off some that 10292 * we could have included.. but this is unlikely (aka 1432/4 10293 * would mean 300+ stream seq's would have to be reported in 10294 * one FWD-TSN. With a bit of work we can later FIX this to 10295 * optimize and pull out duplcates.. but it does add more 10296 * overhead. So for now... not! 10297 */ 10298 at = TAILQ_FIRST(&asoc->sent_queue); 10299 for (i = 0; i < cnt_of_skipped; i++) { 10300 tp1 = TAILQ_NEXT(at, sctp_next); 10301 if (tp1 == NULL) 10302 break; 10303 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 10304 /* We don't report these */ 10305 i--; 10306 at = tp1; 10307 continue; 10308 } 10309 if (at->rec.data.TSN_seq == advance_peer_ack_point) { 10310 at->rec.data.fwd_tsn_cnt = 0; 10311 } 10312 strseq->stream = ntohs(at->rec.data.stream_number); 10313 strseq->sequence = ntohs(at->rec.data.stream_seq); 10314 strseq++; 10315 at = tp1; 10316 } 10317 } 10318 return; 10319 } 10320 10321 void 10322 sctp_send_sack(struct sctp_tcb *stcb, int so_locked 10323 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 10324 SCTP_UNUSED 10325 #endif 10326 ) 10327 { 10328 /*- 10329 * Queue up a SACK or NR-SACK in the control queue. 10330 * We must first check to see if a SACK or NR-SACK is 10331 * somehow on the control queue. 10332 * If so, we will take and and remove the old one. 10333 */ 10334 struct sctp_association *asoc; 10335 struct sctp_tmit_chunk *chk, *a_chk; 10336 struct sctp_sack_chunk *sack; 10337 struct sctp_nr_sack_chunk *nr_sack; 10338 struct sctp_gap_ack_block *gap_descriptor; 10339 struct sack_track *selector; 10340 int mergeable = 0; 10341 int offset; 10342 caddr_t limit; 10343 uint32_t *dup; 10344 int limit_reached = 0; 10345 unsigned int i, siz, j; 10346 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space; 10347 int num_dups = 0; 10348 int space_req; 10349 uint32_t highest_tsn; 10350 uint8_t flags; 10351 uint8_t type; 10352 uint8_t tsn_map; 10353 10354 if (stcb->asoc.nrsack_supported == 1) { 10355 type = SCTP_NR_SELECTIVE_ACK; 10356 } else { 10357 type = SCTP_SELECTIVE_ACK; 10358 } 10359 a_chk = NULL; 10360 asoc = &stcb->asoc; 10361 SCTP_TCB_LOCK_ASSERT(stcb); 10362 if (asoc->last_data_chunk_from == NULL) { 10363 /* Hmm we never received anything */ 10364 return; 10365 } 10366 sctp_slide_mapping_arrays(stcb); 10367 sctp_set_rwnd(stcb, asoc); 10368 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 10369 if (chk->rec.chunk_id.id == type) { 10370 /* Hmm, found a sack already on queue, remove it */ 10371 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 10372 asoc->ctrl_queue_cnt--; 10373 a_chk = chk; 10374 if (a_chk->data) { 10375 sctp_m_freem(a_chk->data); 10376 a_chk->data = NULL; 10377 } 10378 if (a_chk->whoTo) { 10379 sctp_free_remote_addr(a_chk->whoTo); 10380 a_chk->whoTo = NULL; 10381 } 10382 break; 10383 } 10384 } 10385 if (a_chk == NULL) { 10386 sctp_alloc_a_chunk(stcb, a_chk); 10387 if (a_chk == NULL) { 10388 /* No memory so we drop the idea, and set a timer */ 10389 if (stcb->asoc.delayed_ack) { 10390 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 10391 stcb->sctp_ep, stcb, NULL, 10392 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3); 10393 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 10394 stcb->sctp_ep, stcb, NULL); 10395 } else { 10396 stcb->asoc.send_sack = 1; 10397 } 10398 return; 10399 } 10400 a_chk->copy_by_ref = 0; 10401 a_chk->rec.chunk_id.id = type; 10402 a_chk->rec.chunk_id.can_take_data = 1; 10403 } 10404 /* Clear our pkt counts */ 10405 asoc->data_pkts_seen = 0; 10406 10407 a_chk->flags = 0; 10408 a_chk->asoc = asoc; 10409 a_chk->snd_count = 0; 10410 a_chk->send_size = 0; /* fill in later */ 10411 a_chk->sent = SCTP_DATAGRAM_UNSENT; 10412 a_chk->whoTo = NULL; 10413 10414 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) { 10415 /*- 10416 * Ok, the destination for the SACK is unreachable, lets see if 10417 * we can select an alternate to asoc->last_data_chunk_from 10418 */ 10419 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0); 10420 if (a_chk->whoTo == NULL) { 10421 /* Nope, no alternate */ 10422 a_chk->whoTo = asoc->last_data_chunk_from; 10423 } 10424 } else { 10425 a_chk->whoTo = asoc->last_data_chunk_from; 10426 } 10427 if (a_chk->whoTo) { 10428 atomic_add_int(&a_chk->whoTo->ref_count, 1); 10429 } 10430 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) { 10431 highest_tsn = asoc->highest_tsn_inside_map; 10432 } else { 10433 highest_tsn = asoc->highest_tsn_inside_nr_map; 10434 } 10435 if (highest_tsn == asoc->cumulative_tsn) { 10436 /* no gaps */ 10437 if (type == SCTP_SELECTIVE_ACK) { 10438 space_req = sizeof(struct sctp_sack_chunk); 10439 } else { 10440 space_req = sizeof(struct sctp_nr_sack_chunk); 10441 } 10442 } else { 10443 /* gaps get a cluster */ 10444 space_req = MCLBYTES; 10445 } 10446 /* Ok now lets formulate a MBUF with our sack */ 10447 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA); 10448 if ((a_chk->data == NULL) || 10449 (a_chk->whoTo == NULL)) { 10450 /* rats, no mbuf memory */ 10451 if (a_chk->data) { 10452 /* was a problem with the destination */ 10453 sctp_m_freem(a_chk->data); 10454 a_chk->data = NULL; 10455 } 10456 sctp_free_a_chunk(stcb, a_chk, so_locked); 10457 /* sa_ignore NO_NULL_CHK */ 10458 if (stcb->asoc.delayed_ack) { 10459 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 10460 stcb->sctp_ep, stcb, NULL, 10461 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4); 10462 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 10463 stcb->sctp_ep, stcb, NULL); 10464 } else { 10465 stcb->asoc.send_sack = 1; 10466 } 10467 return; 10468 } 10469 /* ok, lets go through and fill it in */ 10470 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD); 10471 space = M_TRAILINGSPACE(a_chk->data); 10472 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) { 10473 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD); 10474 } 10475 limit = mtod(a_chk->data, caddr_t); 10476 limit += space; 10477 10478 flags = 0; 10479 10480 if ((asoc->sctp_cmt_on_off > 0) && 10481 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) { 10482 /*- 10483 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been 10484 * received, then set high bit to 1, else 0. Reset 10485 * pkts_rcvd. 10486 */ 10487 flags |= (asoc->cmt_dac_pkts_rcvd << 6); 10488 asoc->cmt_dac_pkts_rcvd = 0; 10489 } 10490 #ifdef SCTP_ASOCLOG_OF_TSNS 10491 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn; 10492 stcb->asoc.cumack_log_atsnt++; 10493 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) { 10494 stcb->asoc.cumack_log_atsnt = 0; 10495 } 10496 #endif 10497 /* reset the readers interpretation */ 10498 stcb->freed_by_sorcv_sincelast = 0; 10499 10500 if (type == SCTP_SELECTIVE_ACK) { 10501 sack = mtod(a_chk->data, struct sctp_sack_chunk *); 10502 nr_sack = NULL; 10503 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk)); 10504 if (highest_tsn > asoc->mapping_array_base_tsn) { 10505 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10506 } else { 10507 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8; 10508 } 10509 } else { 10510 sack = NULL; 10511 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *); 10512 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk)); 10513 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) { 10514 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10515 } else { 10516 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8; 10517 } 10518 } 10519 10520 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { 10521 offset = 1; 10522 } else { 10523 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; 10524 } 10525 if (((type == SCTP_SELECTIVE_ACK) && 10526 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) || 10527 ((type == SCTP_NR_SELECTIVE_ACK) && 10528 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) { 10529 /* we have a gap .. maybe */ 10530 for (i = 0; i < siz; i++) { 10531 tsn_map = asoc->mapping_array[i]; 10532 if (type == SCTP_SELECTIVE_ACK) { 10533 tsn_map |= asoc->nr_mapping_array[i]; 10534 } 10535 if (i == 0) { 10536 /* 10537 * Clear all bits corresponding to TSNs 10538 * smaller or equal to the cumulative TSN. 10539 */ 10540 tsn_map &= (~0 << (1 - offset)); 10541 } 10542 selector = &sack_array[tsn_map]; 10543 if (mergeable && selector->right_edge) { 10544 /* 10545 * Backup, left and right edges were ok to 10546 * merge. 10547 */ 10548 num_gap_blocks--; 10549 gap_descriptor--; 10550 } 10551 if (selector->num_entries == 0) 10552 mergeable = 0; 10553 else { 10554 for (j = 0; j < selector->num_entries; j++) { 10555 if (mergeable && selector->right_edge) { 10556 /* 10557 * do a merge by NOT setting 10558 * the left side 10559 */ 10560 mergeable = 0; 10561 } else { 10562 /* 10563 * no merge, set the left 10564 * side 10565 */ 10566 mergeable = 0; 10567 gap_descriptor->start = htons((selector->gaps[j].start + offset)); 10568 } 10569 gap_descriptor->end = htons((selector->gaps[j].end + offset)); 10570 num_gap_blocks++; 10571 gap_descriptor++; 10572 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { 10573 /* no more room */ 10574 limit_reached = 1; 10575 break; 10576 } 10577 } 10578 if (selector->left_edge) { 10579 mergeable = 1; 10580 } 10581 } 10582 if (limit_reached) { 10583 /* Reached the limit stop */ 10584 break; 10585 } 10586 offset += 8; 10587 } 10588 } 10589 if ((type == SCTP_NR_SELECTIVE_ACK) && 10590 (limit_reached == 0)) { 10591 10592 mergeable = 0; 10593 10594 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) { 10595 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10596 } else { 10597 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8; 10598 } 10599 10600 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { 10601 offset = 1; 10602 } else { 10603 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; 10604 } 10605 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) { 10606 /* we have a gap .. maybe */ 10607 for (i = 0; i < siz; i++) { 10608 tsn_map = asoc->nr_mapping_array[i]; 10609 if (i == 0) { 10610 /* 10611 * Clear all bits corresponding to 10612 * TSNs smaller or equal to the 10613 * cumulative TSN. 10614 */ 10615 tsn_map &= (~0 << (1 - offset)); 10616 } 10617 selector = &sack_array[tsn_map]; 10618 if (mergeable && selector->right_edge) { 10619 /* 10620 * Backup, left and right edges were 10621 * ok to merge. 10622 */ 10623 num_nr_gap_blocks--; 10624 gap_descriptor--; 10625 } 10626 if (selector->num_entries == 0) 10627 mergeable = 0; 10628 else { 10629 for (j = 0; j < selector->num_entries; j++) { 10630 if (mergeable && selector->right_edge) { 10631 /* 10632 * do a merge by NOT 10633 * setting the left 10634 * side 10635 */ 10636 mergeable = 0; 10637 } else { 10638 /* 10639 * no merge, set the 10640 * left side 10641 */ 10642 mergeable = 0; 10643 gap_descriptor->start = htons((selector->gaps[j].start + offset)); 10644 } 10645 gap_descriptor->end = htons((selector->gaps[j].end + offset)); 10646 num_nr_gap_blocks++; 10647 gap_descriptor++; 10648 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { 10649 /* no more room */ 10650 limit_reached = 1; 10651 break; 10652 } 10653 } 10654 if (selector->left_edge) { 10655 mergeable = 1; 10656 } 10657 } 10658 if (limit_reached) { 10659 /* Reached the limit stop */ 10660 break; 10661 } 10662 offset += 8; 10663 } 10664 } 10665 } 10666 /* now we must add any dups we are going to report. */ 10667 if ((limit_reached == 0) && (asoc->numduptsns)) { 10668 dup = (uint32_t *) gap_descriptor; 10669 for (i = 0; i < asoc->numduptsns; i++) { 10670 *dup = htonl(asoc->dup_tsns[i]); 10671 dup++; 10672 num_dups++; 10673 if (((caddr_t)dup + sizeof(uint32_t)) > limit) { 10674 /* no more room */ 10675 break; 10676 } 10677 } 10678 asoc->numduptsns = 0; 10679 } 10680 /* 10681 * now that the chunk is prepared queue it to the control chunk 10682 * queue. 10683 */ 10684 if (type == SCTP_SELECTIVE_ACK) { 10685 a_chk->send_size = sizeof(struct sctp_sack_chunk) + 10686 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + 10687 num_dups * sizeof(int32_t); 10688 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; 10689 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); 10690 sack->sack.a_rwnd = htonl(asoc->my_rwnd); 10691 sack->sack.num_gap_ack_blks = htons(num_gap_blocks); 10692 sack->sack.num_dup_tsns = htons(num_dups); 10693 sack->ch.chunk_type = type; 10694 sack->ch.chunk_flags = flags; 10695 sack->ch.chunk_length = htons(a_chk->send_size); 10696 } else { 10697 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) + 10698 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + 10699 num_dups * sizeof(int32_t); 10700 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; 10701 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); 10702 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd); 10703 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks); 10704 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks); 10705 nr_sack->nr_sack.num_dup_tsns = htons(num_dups); 10706 nr_sack->nr_sack.reserved = 0; 10707 nr_sack->ch.chunk_type = type; 10708 nr_sack->ch.chunk_flags = flags; 10709 nr_sack->ch.chunk_length = htons(a_chk->send_size); 10710 } 10711 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next); 10712 asoc->my_last_reported_rwnd = asoc->my_rwnd; 10713 asoc->ctrl_queue_cnt++; 10714 asoc->send_sack = 0; 10715 SCTP_STAT_INCR(sctps_sendsacks); 10716 return; 10717 } 10718 10719 void 10720 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked 10721 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 10722 SCTP_UNUSED 10723 #endif 10724 ) 10725 { 10726 struct mbuf *m_abort, *m, *m_last; 10727 struct mbuf *m_out, *m_end = NULL; 10728 struct sctp_abort_chunk *abort; 10729 struct sctp_auth_chunk *auth = NULL; 10730 struct sctp_nets *net; 10731 uint32_t vtag; 10732 uint32_t auth_offset = 0; 10733 uint16_t cause_len, chunk_len, padding_len; 10734 10735 SCTP_TCB_LOCK_ASSERT(stcb); 10736 /*- 10737 * Add an AUTH chunk, if chunk requires it and save the offset into 10738 * the chain for AUTH 10739 */ 10740 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION, 10741 stcb->asoc.peer_auth_chunks)) { 10742 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset, 10743 stcb, SCTP_ABORT_ASSOCIATION); 10744 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10745 } else { 10746 m_out = NULL; 10747 } 10748 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER); 10749 if (m_abort == NULL) { 10750 if (m_out) { 10751 sctp_m_freem(m_out); 10752 } 10753 if (operr) { 10754 sctp_m_freem(operr); 10755 } 10756 return; 10757 } 10758 /* link in any error */ 10759 SCTP_BUF_NEXT(m_abort) = operr; 10760 cause_len = 0; 10761 m_last = NULL; 10762 for (m = operr; m; m = SCTP_BUF_NEXT(m)) { 10763 cause_len += (uint16_t) SCTP_BUF_LEN(m); 10764 if (SCTP_BUF_NEXT(m) == NULL) { 10765 m_last = m; 10766 } 10767 } 10768 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk); 10769 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len; 10770 padding_len = SCTP_SIZE32(chunk_len) - chunk_len; 10771 if (m_out == NULL) { 10772 /* NO Auth chunk prepended, so reserve space in front */ 10773 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD); 10774 m_out = m_abort; 10775 } else { 10776 /* Put AUTH chunk at the front of the chain */ 10777 SCTP_BUF_NEXT(m_end) = m_abort; 10778 } 10779 if (stcb->asoc.alternate) { 10780 net = stcb->asoc.alternate; 10781 } else { 10782 net = stcb->asoc.primary_destination; 10783 } 10784 /* Fill in the ABORT chunk header. */ 10785 abort = mtod(m_abort, struct sctp_abort_chunk *); 10786 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION; 10787 if (stcb->asoc.peer_vtag == 0) { 10788 /* This happens iff the assoc is in COOKIE-WAIT state. */ 10789 vtag = stcb->asoc.my_vtag; 10790 abort->ch.chunk_flags = SCTP_HAD_NO_TCB; 10791 } else { 10792 vtag = stcb->asoc.peer_vtag; 10793 abort->ch.chunk_flags = 0; 10794 } 10795 abort->ch.chunk_length = htons(chunk_len); 10796 /* Add padding, if necessary. */ 10797 if (padding_len > 0) { 10798 if ((m_last == NULL) || 10799 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) { 10800 sctp_m_freem(m_out); 10801 return; 10802 } 10803 } 10804 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, 10805 (struct sockaddr *)&net->ro._l_addr, 10806 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0, 10807 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag), 10808 stcb->asoc.primary_destination->port, NULL, 10809 0, 0, 10810 so_locked); 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_NOWAIT, 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, 0, 10845 stcb->sctp_ep->sctp_lport, stcb->rport, 10846 htonl(vtag), 10847 net->port, NULL, 10848 0, 0, 10849 SCTP_SO_NOT_LOCKED); 10850 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10851 return; 10852 } 10853 10854 static void 10855 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst, 10856 struct sctphdr *sh, uint32_t vtag, 10857 uint8_t type, struct mbuf *cause, 10858 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, 10859 uint32_t vrf_id, uint16_t port) 10860 { 10861 struct mbuf *o_pak; 10862 struct mbuf *mout; 10863 struct sctphdr *shout; 10864 struct sctp_chunkhdr *ch; 10865 10866 #if defined(INET) || defined(INET6) 10867 struct udphdr *udp; 10868 int ret; 10869 10870 #endif 10871 int len, cause_len, padding_len; 10872 10873 #ifdef INET 10874 struct sockaddr_in *src_sin, *dst_sin; 10875 struct ip *ip; 10876 10877 #endif 10878 #ifdef INET6 10879 struct sockaddr_in6 *src_sin6, *dst_sin6; 10880 struct ip6_hdr *ip6; 10881 10882 #endif 10883 10884 /* Compute the length of the cause and add final padding. */ 10885 cause_len = 0; 10886 if (cause != NULL) { 10887 struct mbuf *m_at, *m_last = NULL; 10888 10889 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 10890 if (SCTP_BUF_NEXT(m_at) == NULL) 10891 m_last = m_at; 10892 cause_len += SCTP_BUF_LEN(m_at); 10893 } 10894 padding_len = cause_len % 4; 10895 if (padding_len != 0) { 10896 padding_len = 4 - padding_len; 10897 } 10898 if (padding_len != 0) { 10899 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 10900 sctp_m_freem(cause); 10901 return; 10902 } 10903 } 10904 } else { 10905 padding_len = 0; 10906 } 10907 /* Get an mbuf for the header. */ 10908 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 10909 switch (dst->sa_family) { 10910 #ifdef INET 10911 case AF_INET: 10912 len += sizeof(struct ip); 10913 break; 10914 #endif 10915 #ifdef INET6 10916 case AF_INET6: 10917 len += sizeof(struct ip6_hdr); 10918 break; 10919 #endif 10920 default: 10921 break; 10922 } 10923 #if defined(INET) || defined(INET6) 10924 if (port) { 10925 len += sizeof(struct udphdr); 10926 } 10927 #endif 10928 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA); 10929 if (mout == NULL) { 10930 if (cause) { 10931 sctp_m_freem(cause); 10932 } 10933 return; 10934 } 10935 SCTP_BUF_RESV_UF(mout, max_linkhdr); 10936 SCTP_BUF_LEN(mout) = len; 10937 SCTP_BUF_NEXT(mout) = cause; 10938 M_SETFIB(mout, fibnum); 10939 mout->m_pkthdr.flowid = mflowid; 10940 M_HASHTYPE_SET(mout, mflowtype); 10941 #ifdef INET 10942 ip = NULL; 10943 #endif 10944 #ifdef INET6 10945 ip6 = NULL; 10946 #endif 10947 switch (dst->sa_family) { 10948 #ifdef INET 10949 case AF_INET: 10950 src_sin = (struct sockaddr_in *)src; 10951 dst_sin = (struct sockaddr_in *)dst; 10952 ip = mtod(mout, struct ip *); 10953 ip->ip_v = IPVERSION; 10954 ip->ip_hl = (sizeof(struct ip) >> 2); 10955 ip->ip_tos = 0; 10956 ip->ip_id = ip_newid(); 10957 ip->ip_off = 0; 10958 ip->ip_ttl = MODULE_GLOBAL(ip_defttl); 10959 if (port) { 10960 ip->ip_p = IPPROTO_UDP; 10961 } else { 10962 ip->ip_p = IPPROTO_SCTP; 10963 } 10964 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr; 10965 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr; 10966 ip->ip_sum = 0; 10967 len = sizeof(struct ip); 10968 shout = (struct sctphdr *)((caddr_t)ip + len); 10969 break; 10970 #endif 10971 #ifdef INET6 10972 case AF_INET6: 10973 src_sin6 = (struct sockaddr_in6 *)src; 10974 dst_sin6 = (struct sockaddr_in6 *)dst; 10975 ip6 = mtod(mout, struct ip6_hdr *); 10976 ip6->ip6_flow = htonl(0x60000000); 10977 if (V_ip6_auto_flowlabel) { 10978 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 10979 } 10980 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim); 10981 if (port) { 10982 ip6->ip6_nxt = IPPROTO_UDP; 10983 } else { 10984 ip6->ip6_nxt = IPPROTO_SCTP; 10985 } 10986 ip6->ip6_src = dst_sin6->sin6_addr; 10987 ip6->ip6_dst = src_sin6->sin6_addr; 10988 len = sizeof(struct ip6_hdr); 10989 shout = (struct sctphdr *)((caddr_t)ip6 + len); 10990 break; 10991 #endif 10992 default: 10993 len = 0; 10994 shout = mtod(mout, struct sctphdr *); 10995 break; 10996 } 10997 #if defined(INET) || defined(INET6) 10998 if (port) { 10999 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 11000 sctp_m_freem(mout); 11001 return; 11002 } 11003 udp = (struct udphdr *)shout; 11004 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 11005 udp->uh_dport = port; 11006 udp->uh_sum = 0; 11007 udp->uh_ulen = htons(sizeof(struct udphdr) + 11008 sizeof(struct sctphdr) + 11009 sizeof(struct sctp_chunkhdr) + 11010 cause_len + padding_len); 11011 len += sizeof(struct udphdr); 11012 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr)); 11013 } else { 11014 udp = NULL; 11015 } 11016 #endif 11017 shout->src_port = sh->dest_port; 11018 shout->dest_port = sh->src_port; 11019 shout->checksum = 0; 11020 if (vtag) { 11021 shout->v_tag = htonl(vtag); 11022 } else { 11023 shout->v_tag = sh->v_tag; 11024 } 11025 len += sizeof(struct sctphdr); 11026 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr)); 11027 ch->chunk_type = type; 11028 if (vtag) { 11029 ch->chunk_flags = 0; 11030 } else { 11031 ch->chunk_flags = SCTP_HAD_NO_TCB; 11032 } 11033 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len); 11034 len += sizeof(struct sctp_chunkhdr); 11035 len += cause_len + padding_len; 11036 11037 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 11038 sctp_m_freem(mout); 11039 return; 11040 } 11041 SCTP_ATTACH_CHAIN(o_pak, mout, len); 11042 switch (dst->sa_family) { 11043 #ifdef INET 11044 case AF_INET: 11045 if (port) { 11046 if (V_udp_cksum) { 11047 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 11048 } else { 11049 udp->uh_sum = 0; 11050 } 11051 } 11052 ip->ip_len = htons(len); 11053 if (port) { 11054 #if defined(SCTP_WITH_NO_CSUM) 11055 SCTP_STAT_INCR(sctps_sendnocrc); 11056 #else 11057 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr)); 11058 SCTP_STAT_INCR(sctps_sendswcrc); 11059 #endif 11060 if (V_udp_cksum) { 11061 SCTP_ENABLE_UDP_CSUM(o_pak); 11062 } 11063 } else { 11064 #if defined(SCTP_WITH_NO_CSUM) 11065 SCTP_STAT_INCR(sctps_sendnocrc); 11066 #else 11067 mout->m_pkthdr.csum_flags = CSUM_SCTP; 11068 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 11069 SCTP_STAT_INCR(sctps_sendhwcrc); 11070 #endif 11071 } 11072 #ifdef SCTP_PACKET_LOGGING 11073 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 11074 sctp_packet_log(o_pak); 11075 } 11076 #endif 11077 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id); 11078 break; 11079 #endif 11080 #ifdef INET6 11081 case AF_INET6: 11082 ip6->ip6_plen = len - sizeof(struct ip6_hdr); 11083 if (port) { 11084 #if defined(SCTP_WITH_NO_CSUM) 11085 SCTP_STAT_INCR(sctps_sendnocrc); 11086 #else 11087 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 11088 SCTP_STAT_INCR(sctps_sendswcrc); 11089 #endif 11090 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) { 11091 udp->uh_sum = 0xffff; 11092 } 11093 } else { 11094 #if defined(SCTP_WITH_NO_CSUM) 11095 SCTP_STAT_INCR(sctps_sendnocrc); 11096 #else 11097 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6; 11098 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 11099 SCTP_STAT_INCR(sctps_sendhwcrc); 11100 #endif 11101 } 11102 #ifdef SCTP_PACKET_LOGGING 11103 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 11104 sctp_packet_log(o_pak); 11105 } 11106 #endif 11107 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id); 11108 break; 11109 #endif 11110 default: 11111 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n", 11112 dst->sa_family); 11113 sctp_m_freem(mout); 11114 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); 11115 return; 11116 } 11117 SCTP_STAT_INCR(sctps_sendpackets); 11118 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 11119 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 11120 return; 11121 } 11122 11123 void 11124 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst, 11125 struct sctphdr *sh, 11126 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, 11127 uint32_t vrf_id, uint16_t port) 11128 { 11129 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL, 11130 mflowtype, mflowid, fibnum, 11131 vrf_id, port); 11132 } 11133 11134 void 11135 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked 11136 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 11137 SCTP_UNUSED 11138 #endif 11139 ) 11140 { 11141 struct sctp_tmit_chunk *chk; 11142 struct sctp_heartbeat_chunk *hb; 11143 struct timeval now; 11144 11145 SCTP_TCB_LOCK_ASSERT(stcb); 11146 if (net == NULL) { 11147 return; 11148 } 11149 (void)SCTP_GETTIME_TIMEVAL(&now); 11150 switch (net->ro._l_addr.sa.sa_family) { 11151 #ifdef INET 11152 case AF_INET: 11153 break; 11154 #endif 11155 #ifdef INET6 11156 case AF_INET6: 11157 break; 11158 #endif 11159 default: 11160 return; 11161 } 11162 sctp_alloc_a_chunk(stcb, chk); 11163 if (chk == NULL) { 11164 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n"); 11165 return; 11166 } 11167 chk->copy_by_ref = 0; 11168 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST; 11169 chk->rec.chunk_id.can_take_data = 1; 11170 chk->flags = 0; 11171 chk->asoc = &stcb->asoc; 11172 chk->send_size = sizeof(struct sctp_heartbeat_chunk); 11173 11174 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11175 if (chk->data == NULL) { 11176 sctp_free_a_chunk(stcb, chk, so_locked); 11177 return; 11178 } 11179 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11180 SCTP_BUF_LEN(chk->data) = chk->send_size; 11181 chk->sent = SCTP_DATAGRAM_UNSENT; 11182 chk->snd_count = 0; 11183 chk->whoTo = net; 11184 atomic_add_int(&chk->whoTo->ref_count, 1); 11185 /* Now we have a mbuf that we can fill in with the details */ 11186 hb = mtod(chk->data, struct sctp_heartbeat_chunk *); 11187 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk)); 11188 /* fill out chunk header */ 11189 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST; 11190 hb->ch.chunk_flags = 0; 11191 hb->ch.chunk_length = htons(chk->send_size); 11192 /* Fill out hb parameter */ 11193 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO); 11194 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param)); 11195 hb->heartbeat.hb_info.time_value_1 = now.tv_sec; 11196 hb->heartbeat.hb_info.time_value_2 = now.tv_usec; 11197 /* Did our user request this one, put it in */ 11198 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family; 11199 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len; 11200 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 11201 /* 11202 * we only take from the entropy pool if the address is not 11203 * confirmed. 11204 */ 11205 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 11206 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 11207 } else { 11208 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0; 11209 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0; 11210 } 11211 switch (net->ro._l_addr.sa.sa_family) { 11212 #ifdef INET 11213 case AF_INET: 11214 memcpy(hb->heartbeat.hb_info.address, 11215 &net->ro._l_addr.sin.sin_addr, 11216 sizeof(net->ro._l_addr.sin.sin_addr)); 11217 break; 11218 #endif 11219 #ifdef INET6 11220 case AF_INET6: 11221 memcpy(hb->heartbeat.hb_info.address, 11222 &net->ro._l_addr.sin6.sin6_addr, 11223 sizeof(net->ro._l_addr.sin6.sin6_addr)); 11224 break; 11225 #endif 11226 default: 11227 return; 11228 break; 11229 } 11230 net->hb_responded = 0; 11231 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11232 stcb->asoc.ctrl_queue_cnt++; 11233 SCTP_STAT_INCR(sctps_sendheartbeat); 11234 return; 11235 } 11236 11237 void 11238 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net, 11239 uint32_t high_tsn) 11240 { 11241 struct sctp_association *asoc; 11242 struct sctp_ecne_chunk *ecne; 11243 struct sctp_tmit_chunk *chk; 11244 11245 if (net == NULL) { 11246 return; 11247 } 11248 asoc = &stcb->asoc; 11249 SCTP_TCB_LOCK_ASSERT(stcb); 11250 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 11251 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) { 11252 /* found a previous ECN_ECHO update it if needed */ 11253 uint32_t cnt, ctsn; 11254 11255 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 11256 ctsn = ntohl(ecne->tsn); 11257 if (SCTP_TSN_GT(high_tsn, ctsn)) { 11258 ecne->tsn = htonl(high_tsn); 11259 SCTP_STAT_INCR(sctps_queue_upd_ecne); 11260 } 11261 cnt = ntohl(ecne->num_pkts_since_cwr); 11262 cnt++; 11263 ecne->num_pkts_since_cwr = htonl(cnt); 11264 return; 11265 } 11266 } 11267 /* nope could not find one to update so we must build one */ 11268 sctp_alloc_a_chunk(stcb, chk); 11269 if (chk == NULL) { 11270 return; 11271 } 11272 SCTP_STAT_INCR(sctps_queue_upd_ecne); 11273 chk->copy_by_ref = 0; 11274 chk->rec.chunk_id.id = SCTP_ECN_ECHO; 11275 chk->rec.chunk_id.can_take_data = 0; 11276 chk->flags = 0; 11277 chk->asoc = &stcb->asoc; 11278 chk->send_size = sizeof(struct sctp_ecne_chunk); 11279 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11280 if (chk->data == NULL) { 11281 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11282 return; 11283 } 11284 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11285 SCTP_BUF_LEN(chk->data) = chk->send_size; 11286 chk->sent = SCTP_DATAGRAM_UNSENT; 11287 chk->snd_count = 0; 11288 chk->whoTo = net; 11289 atomic_add_int(&chk->whoTo->ref_count, 1); 11290 11291 stcb->asoc.ecn_echo_cnt_onq++; 11292 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 11293 ecne->ch.chunk_type = SCTP_ECN_ECHO; 11294 ecne->ch.chunk_flags = 0; 11295 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk)); 11296 ecne->tsn = htonl(high_tsn); 11297 ecne->num_pkts_since_cwr = htonl(1); 11298 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next); 11299 asoc->ctrl_queue_cnt++; 11300 } 11301 11302 void 11303 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net, 11304 struct mbuf *m, int len, int iphlen, int bad_crc) 11305 { 11306 struct sctp_association *asoc; 11307 struct sctp_pktdrop_chunk *drp; 11308 struct sctp_tmit_chunk *chk; 11309 uint8_t *datap; 11310 int was_trunc = 0; 11311 int fullsz = 0; 11312 long spc; 11313 int offset; 11314 struct sctp_chunkhdr *ch, chunk_buf; 11315 unsigned int chk_length; 11316 11317 if (!stcb) { 11318 return; 11319 } 11320 asoc = &stcb->asoc; 11321 SCTP_TCB_LOCK_ASSERT(stcb); 11322 if (asoc->pktdrop_supported == 0) { 11323 /*- 11324 * peer must declare support before I send one. 11325 */ 11326 return; 11327 } 11328 if (stcb->sctp_socket == NULL) { 11329 return; 11330 } 11331 sctp_alloc_a_chunk(stcb, chk); 11332 if (chk == NULL) { 11333 return; 11334 } 11335 chk->copy_by_ref = 0; 11336 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED; 11337 chk->rec.chunk_id.can_take_data = 1; 11338 chk->flags = 0; 11339 len -= iphlen; 11340 chk->send_size = len; 11341 /* Validate that we do not have an ABORT in here. */ 11342 offset = iphlen + sizeof(struct sctphdr); 11343 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, 11344 sizeof(*ch), (uint8_t *) & chunk_buf); 11345 while (ch != NULL) { 11346 chk_length = ntohs(ch->chunk_length); 11347 if (chk_length < sizeof(*ch)) { 11348 /* break to abort land */ 11349 break; 11350 } 11351 switch (ch->chunk_type) { 11352 case SCTP_PACKET_DROPPED: 11353 case SCTP_ABORT_ASSOCIATION: 11354 case SCTP_INITIATION_ACK: 11355 /** 11356 * We don't respond with an PKT-DROP to an ABORT 11357 * or PKT-DROP. We also do not respond to an 11358 * INIT-ACK, because we can't know if the initiation 11359 * tag is correct or not. 11360 */ 11361 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11362 return; 11363 default: 11364 break; 11365 } 11366 offset += SCTP_SIZE32(chk_length); 11367 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, 11368 sizeof(*ch), (uint8_t *) & chunk_buf); 11369 } 11370 11371 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) > 11372 min(stcb->asoc.smallest_mtu, MCLBYTES)) { 11373 /* 11374 * only send 1 mtu worth, trim off the excess on the end. 11375 */ 11376 fullsz = len; 11377 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD; 11378 was_trunc = 1; 11379 } 11380 chk->asoc = &stcb->asoc; 11381 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 11382 if (chk->data == NULL) { 11383 jump_out: 11384 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11385 return; 11386 } 11387 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11388 drp = mtod(chk->data, struct sctp_pktdrop_chunk *); 11389 if (drp == NULL) { 11390 sctp_m_freem(chk->data); 11391 chk->data = NULL; 11392 goto jump_out; 11393 } 11394 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) + 11395 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD)); 11396 chk->book_size_scale = 0; 11397 if (was_trunc) { 11398 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED; 11399 drp->trunc_len = htons(fullsz); 11400 /* 11401 * Len is already adjusted to size minus overhead above take 11402 * out the pkt_drop chunk itself from it. 11403 */ 11404 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk); 11405 len = chk->send_size; 11406 } else { 11407 /* no truncation needed */ 11408 drp->ch.chunk_flags = 0; 11409 drp->trunc_len = htons(0); 11410 } 11411 if (bad_crc) { 11412 drp->ch.chunk_flags |= SCTP_BADCRC; 11413 } 11414 chk->send_size += sizeof(struct sctp_pktdrop_chunk); 11415 SCTP_BUF_LEN(chk->data) = chk->send_size; 11416 chk->sent = SCTP_DATAGRAM_UNSENT; 11417 chk->snd_count = 0; 11418 if (net) { 11419 /* we should hit here */ 11420 chk->whoTo = net; 11421 atomic_add_int(&chk->whoTo->ref_count, 1); 11422 } else { 11423 chk->whoTo = NULL; 11424 } 11425 drp->ch.chunk_type = SCTP_PACKET_DROPPED; 11426 drp->ch.chunk_length = htons(chk->send_size); 11427 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket); 11428 if (spc < 0) { 11429 spc = 0; 11430 } 11431 drp->bottle_bw = htonl(spc); 11432 if (asoc->my_rwnd) { 11433 drp->current_onq = htonl(asoc->size_on_reasm_queue + 11434 asoc->size_on_all_streams + 11435 asoc->my_rwnd_control_len + 11436 stcb->sctp_socket->so_rcv.sb_cc); 11437 } else { 11438 /*- 11439 * If my rwnd is 0, possibly from mbuf depletion as well as 11440 * space used, tell the peer there is NO space aka onq == bw 11441 */ 11442 drp->current_onq = htonl(spc); 11443 } 11444 drp->reserved = 0; 11445 datap = drp->data; 11446 m_copydata(m, iphlen, len, (caddr_t)datap); 11447 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11448 asoc->ctrl_queue_cnt++; 11449 } 11450 11451 void 11452 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override) 11453 { 11454 struct sctp_association *asoc; 11455 struct sctp_cwr_chunk *cwr; 11456 struct sctp_tmit_chunk *chk; 11457 11458 SCTP_TCB_LOCK_ASSERT(stcb); 11459 if (net == NULL) { 11460 return; 11461 } 11462 asoc = &stcb->asoc; 11463 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 11464 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) { 11465 /* 11466 * found a previous CWR queued to same destination 11467 * update it if needed 11468 */ 11469 uint32_t ctsn; 11470 11471 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 11472 ctsn = ntohl(cwr->tsn); 11473 if (SCTP_TSN_GT(high_tsn, ctsn)) { 11474 cwr->tsn = htonl(high_tsn); 11475 } 11476 if (override & SCTP_CWR_REDUCE_OVERRIDE) { 11477 /* Make sure override is carried */ 11478 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE; 11479 } 11480 return; 11481 } 11482 } 11483 sctp_alloc_a_chunk(stcb, chk); 11484 if (chk == NULL) { 11485 return; 11486 } 11487 chk->copy_by_ref = 0; 11488 chk->rec.chunk_id.id = SCTP_ECN_CWR; 11489 chk->rec.chunk_id.can_take_data = 1; 11490 chk->flags = 0; 11491 chk->asoc = &stcb->asoc; 11492 chk->send_size = sizeof(struct sctp_cwr_chunk); 11493 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11494 if (chk->data == NULL) { 11495 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11496 return; 11497 } 11498 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11499 SCTP_BUF_LEN(chk->data) = chk->send_size; 11500 chk->sent = SCTP_DATAGRAM_UNSENT; 11501 chk->snd_count = 0; 11502 chk->whoTo = net; 11503 atomic_add_int(&chk->whoTo->ref_count, 1); 11504 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 11505 cwr->ch.chunk_type = SCTP_ECN_CWR; 11506 cwr->ch.chunk_flags = override; 11507 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk)); 11508 cwr->tsn = htonl(high_tsn); 11509 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11510 asoc->ctrl_queue_cnt++; 11511 } 11512 11513 void 11514 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk, 11515 int number_entries, uint16_t * list, 11516 uint32_t seq, uint32_t resp_seq, uint32_t last_sent) 11517 { 11518 uint16_t len, old_len, i; 11519 struct sctp_stream_reset_out_request *req_out; 11520 struct sctp_chunkhdr *ch; 11521 11522 ch = mtod(chk->data, struct sctp_chunkhdr *); 11523 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11524 11525 /* get to new offset for the param. */ 11526 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len); 11527 /* now how long will this param be? */ 11528 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries)); 11529 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST); 11530 req_out->ph.param_length = htons(len); 11531 req_out->request_seq = htonl(seq); 11532 req_out->response_seq = htonl(resp_seq); 11533 req_out->send_reset_at_tsn = htonl(last_sent); 11534 if (number_entries) { 11535 for (i = 0; i < number_entries; i++) { 11536 req_out->list_of_streams[i] = htons(list[i]); 11537 } 11538 } 11539 if (SCTP_SIZE32(len) > len) { 11540 /*- 11541 * Need to worry about the pad we may end up adding to the 11542 * end. This is easy since the struct is either aligned to 4 11543 * bytes or 2 bytes off. 11544 */ 11545 req_out->list_of_streams[number_entries] = 0; 11546 } 11547 /* now fix the chunk length */ 11548 ch->chunk_length = htons(len + old_len); 11549 chk->book_size = len + old_len; 11550 chk->book_size_scale = 0; 11551 chk->send_size = SCTP_SIZE32(chk->book_size); 11552 SCTP_BUF_LEN(chk->data) = chk->send_size; 11553 return; 11554 } 11555 11556 static void 11557 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk, 11558 int number_entries, uint16_t * list, 11559 uint32_t seq) 11560 { 11561 uint16_t len, old_len, i; 11562 struct sctp_stream_reset_in_request *req_in; 11563 struct sctp_chunkhdr *ch; 11564 11565 ch = mtod(chk->data, struct sctp_chunkhdr *); 11566 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11567 11568 /* get to new offset for the param. */ 11569 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len); 11570 /* now how long will this param be? */ 11571 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries)); 11572 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST); 11573 req_in->ph.param_length = htons(len); 11574 req_in->request_seq = htonl(seq); 11575 if (number_entries) { 11576 for (i = 0; i < number_entries; i++) { 11577 req_in->list_of_streams[i] = htons(list[i]); 11578 } 11579 } 11580 if (SCTP_SIZE32(len) > len) { 11581 /*- 11582 * Need to worry about the pad we may end up adding to the 11583 * end. This is easy since the struct is either aligned to 4 11584 * bytes or 2 bytes off. 11585 */ 11586 req_in->list_of_streams[number_entries] = 0; 11587 } 11588 /* now fix the chunk length */ 11589 ch->chunk_length = htons(len + old_len); 11590 chk->book_size = len + old_len; 11591 chk->book_size_scale = 0; 11592 chk->send_size = SCTP_SIZE32(chk->book_size); 11593 SCTP_BUF_LEN(chk->data) = chk->send_size; 11594 return; 11595 } 11596 11597 static void 11598 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk, 11599 uint32_t seq) 11600 { 11601 uint16_t len, old_len; 11602 struct sctp_stream_reset_tsn_request *req_tsn; 11603 struct sctp_chunkhdr *ch; 11604 11605 ch = mtod(chk->data, struct sctp_chunkhdr *); 11606 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11607 11608 /* get to new offset for the param. */ 11609 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len); 11610 /* now how long will this param be? */ 11611 len = sizeof(struct sctp_stream_reset_tsn_request); 11612 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST); 11613 req_tsn->ph.param_length = htons(len); 11614 req_tsn->request_seq = htonl(seq); 11615 11616 /* now fix the chunk length */ 11617 ch->chunk_length = htons(len + old_len); 11618 chk->send_size = len + old_len; 11619 chk->book_size = SCTP_SIZE32(chk->send_size); 11620 chk->book_size_scale = 0; 11621 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11622 return; 11623 } 11624 11625 void 11626 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk, 11627 uint32_t resp_seq, uint32_t result) 11628 { 11629 uint16_t len, old_len; 11630 struct sctp_stream_reset_response *resp; 11631 struct sctp_chunkhdr *ch; 11632 11633 ch = mtod(chk->data, struct sctp_chunkhdr *); 11634 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11635 11636 /* get to new offset for the param. */ 11637 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len); 11638 /* now how long will this param be? */ 11639 len = sizeof(struct sctp_stream_reset_response); 11640 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 11641 resp->ph.param_length = htons(len); 11642 resp->response_seq = htonl(resp_seq); 11643 resp->result = ntohl(result); 11644 11645 /* now fix the chunk length */ 11646 ch->chunk_length = htons(len + old_len); 11647 chk->book_size = len + old_len; 11648 chk->book_size_scale = 0; 11649 chk->send_size = SCTP_SIZE32(chk->book_size); 11650 SCTP_BUF_LEN(chk->data) = chk->send_size; 11651 return; 11652 } 11653 11654 void 11655 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk, 11656 uint32_t resp_seq, uint32_t result, 11657 uint32_t send_una, uint32_t recv_next) 11658 { 11659 uint16_t len, old_len; 11660 struct sctp_stream_reset_response_tsn *resp; 11661 struct sctp_chunkhdr *ch; 11662 11663 ch = mtod(chk->data, struct sctp_chunkhdr *); 11664 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11665 11666 /* get to new offset for the param. */ 11667 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len); 11668 /* now how long will this param be? */ 11669 len = sizeof(struct sctp_stream_reset_response_tsn); 11670 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 11671 resp->ph.param_length = htons(len); 11672 resp->response_seq = htonl(resp_seq); 11673 resp->result = htonl(result); 11674 resp->senders_next_tsn = htonl(send_una); 11675 resp->receivers_next_tsn = htonl(recv_next); 11676 11677 /* now fix the chunk length */ 11678 ch->chunk_length = htons(len + old_len); 11679 chk->book_size = len + old_len; 11680 chk->send_size = SCTP_SIZE32(chk->book_size); 11681 chk->book_size_scale = 0; 11682 SCTP_BUF_LEN(chk->data) = chk->send_size; 11683 return; 11684 } 11685 11686 static void 11687 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk, 11688 uint32_t seq, 11689 uint16_t adding) 11690 { 11691 uint16_t len, old_len; 11692 struct sctp_chunkhdr *ch; 11693 struct sctp_stream_reset_add_strm *addstr; 11694 11695 ch = mtod(chk->data, struct sctp_chunkhdr *); 11696 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11697 11698 /* get to new offset for the param. */ 11699 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len); 11700 /* now how long will this param be? */ 11701 len = sizeof(struct sctp_stream_reset_add_strm); 11702 11703 /* Fill it out. */ 11704 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS); 11705 addstr->ph.param_length = htons(len); 11706 addstr->request_seq = htonl(seq); 11707 addstr->number_of_streams = htons(adding); 11708 addstr->reserved = 0; 11709 11710 /* now fix the chunk length */ 11711 ch->chunk_length = htons(len + old_len); 11712 chk->send_size = len + old_len; 11713 chk->book_size = SCTP_SIZE32(chk->send_size); 11714 chk->book_size_scale = 0; 11715 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11716 return; 11717 } 11718 11719 static void 11720 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk, 11721 uint32_t seq, 11722 uint16_t adding) 11723 { 11724 uint16_t len, old_len; 11725 struct sctp_chunkhdr *ch; 11726 struct sctp_stream_reset_add_strm *addstr; 11727 11728 ch = mtod(chk->data, struct sctp_chunkhdr *); 11729 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11730 11731 /* get to new offset for the param. */ 11732 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len); 11733 /* now how long will this param be? */ 11734 len = sizeof(struct sctp_stream_reset_add_strm); 11735 /* Fill it out. */ 11736 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS); 11737 addstr->ph.param_length = htons(len); 11738 addstr->request_seq = htonl(seq); 11739 addstr->number_of_streams = htons(adding); 11740 addstr->reserved = 0; 11741 11742 /* now fix the chunk length */ 11743 ch->chunk_length = htons(len + old_len); 11744 chk->send_size = len + old_len; 11745 chk->book_size = SCTP_SIZE32(chk->send_size); 11746 chk->book_size_scale = 0; 11747 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11748 return; 11749 } 11750 11751 int 11752 sctp_send_str_reset_req(struct sctp_tcb *stcb, 11753 uint16_t number_entries, uint16_t * list, 11754 uint8_t send_out_req, 11755 uint8_t send_in_req, 11756 uint8_t send_tsn_req, 11757 uint8_t add_stream, 11758 uint16_t adding_o, 11759 uint16_t adding_i, uint8_t peer_asked) 11760 { 11761 11762 struct sctp_association *asoc; 11763 struct sctp_tmit_chunk *chk; 11764 struct sctp_chunkhdr *ch; 11765 uint32_t seq; 11766 11767 asoc = &stcb->asoc; 11768 if (asoc->stream_reset_outstanding) { 11769 /*- 11770 * Already one pending, must get ACK back to clear the flag. 11771 */ 11772 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY); 11773 return (EBUSY); 11774 } 11775 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) && 11776 (add_stream == 0)) { 11777 /* nothing to do */ 11778 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 11779 return (EINVAL); 11780 } 11781 if (send_tsn_req && (send_out_req || send_in_req)) { 11782 /* error, can't do that */ 11783 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 11784 return (EINVAL); 11785 } 11786 if (number_entries > (MCLBYTES - 11787 SCTP_MIN_OVERHEAD - 11788 sizeof(struct sctp_chunkhdr) - 11789 sizeof(struct sctp_stream_reset_out_request)) / 11790 sizeof(uint16_t)) { 11791 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11792 return (ENOMEM); 11793 } 11794 sctp_alloc_a_chunk(stcb, chk); 11795 if (chk == NULL) { 11796 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11797 return (ENOMEM); 11798 } 11799 chk->copy_by_ref = 0; 11800 chk->rec.chunk_id.id = SCTP_STREAM_RESET; 11801 chk->rec.chunk_id.can_take_data = 0; 11802 chk->flags = 0; 11803 chk->asoc = &stcb->asoc; 11804 chk->book_size = sizeof(struct sctp_chunkhdr); 11805 chk->send_size = SCTP_SIZE32(chk->book_size); 11806 chk->book_size_scale = 0; 11807 11808 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 11809 if (chk->data == NULL) { 11810 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED); 11811 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11812 return (ENOMEM); 11813 } 11814 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11815 11816 /* setup chunk parameters */ 11817 chk->sent = SCTP_DATAGRAM_UNSENT; 11818 chk->snd_count = 0; 11819 if (stcb->asoc.alternate) { 11820 chk->whoTo = stcb->asoc.alternate; 11821 } else { 11822 chk->whoTo = stcb->asoc.primary_destination; 11823 } 11824 atomic_add_int(&chk->whoTo->ref_count, 1); 11825 ch = mtod(chk->data, struct sctp_chunkhdr *); 11826 ch->chunk_type = SCTP_STREAM_RESET; 11827 ch->chunk_flags = 0; 11828 ch->chunk_length = htons(chk->book_size); 11829 SCTP_BUF_LEN(chk->data) = chk->send_size; 11830 11831 seq = stcb->asoc.str_reset_seq_out; 11832 if (send_out_req) { 11833 sctp_add_stream_reset_out(chk, number_entries, list, 11834 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1)); 11835 asoc->stream_reset_out_is_outstanding = 1; 11836 seq++; 11837 asoc->stream_reset_outstanding++; 11838 } 11839 if ((add_stream & 1) && 11840 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) { 11841 /* Need to allocate more */ 11842 struct sctp_stream_out *oldstream; 11843 struct sctp_stream_queue_pending *sp, *nsp; 11844 int i; 11845 11846 #if defined(SCTP_DETAILED_STR_STATS) 11847 int j; 11848 11849 #endif 11850 11851 oldstream = stcb->asoc.strmout; 11852 /* get some more */ 11853 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *, 11854 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)), 11855 SCTP_M_STRMO); 11856 if (stcb->asoc.strmout == NULL) { 11857 uint8_t x; 11858 11859 stcb->asoc.strmout = oldstream; 11860 /* Turn off the bit */ 11861 x = add_stream & 0xfe; 11862 add_stream = x; 11863 goto skip_stuff; 11864 } 11865 /* 11866 * Ok now we proceed with copying the old out stuff and 11867 * initializing the new stuff. 11868 */ 11869 SCTP_TCB_SEND_LOCK(stcb); 11870 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1); 11871 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 11872 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 11873 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues; 11874 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send; 11875 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete; 11876 stcb->asoc.strmout[i].stream_no = i; 11877 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]); 11878 /* now anything on those queues? */ 11879 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) { 11880 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next); 11881 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next); 11882 } 11883 /* Now move assoc pointers too */ 11884 if (stcb->asoc.last_out_stream == &oldstream[i]) { 11885 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i]; 11886 } 11887 if (stcb->asoc.locked_on_sending == &oldstream[i]) { 11888 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i]; 11889 } 11890 } 11891 /* now the new streams */ 11892 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1); 11893 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) { 11894 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 11895 stcb->asoc.strmout[i].chunks_on_queues = 0; 11896 #if defined(SCTP_DETAILED_STR_STATS) 11897 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) { 11898 stcb->asoc.strmout[i].abandoned_sent[j] = 0; 11899 stcb->asoc.strmout[i].abandoned_unsent[j] = 0; 11900 } 11901 #else 11902 stcb->asoc.strmout[i].abandoned_sent[0] = 0; 11903 stcb->asoc.strmout[i].abandoned_unsent[0] = 0; 11904 #endif 11905 stcb->asoc.strmout[i].next_sequence_send = 0x0; 11906 stcb->asoc.strmout[i].stream_no = i; 11907 stcb->asoc.strmout[i].last_msg_incomplete = 0; 11908 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL); 11909 } 11910 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o; 11911 SCTP_FREE(oldstream, SCTP_M_STRMO); 11912 SCTP_TCB_SEND_UNLOCK(stcb); 11913 } 11914 skip_stuff: 11915 if ((add_stream & 1) && (adding_o > 0)) { 11916 asoc->strm_pending_add_size = adding_o; 11917 asoc->peer_req_out = peer_asked; 11918 sctp_add_an_out_stream(chk, seq, adding_o); 11919 seq++; 11920 asoc->stream_reset_outstanding++; 11921 } 11922 if ((add_stream & 2) && (adding_i > 0)) { 11923 sctp_add_an_in_stream(chk, seq, adding_i); 11924 seq++; 11925 asoc->stream_reset_outstanding++; 11926 } 11927 if (send_in_req) { 11928 sctp_add_stream_reset_in(chk, number_entries, list, seq); 11929 seq++; 11930 asoc->stream_reset_outstanding++; 11931 } 11932 if (send_tsn_req) { 11933 sctp_add_stream_reset_tsn(chk, seq); 11934 asoc->stream_reset_outstanding++; 11935 } 11936 asoc->str_reset = chk; 11937 /* insert the chunk for sending */ 11938 TAILQ_INSERT_TAIL(&asoc->control_send_queue, 11939 chk, 11940 sctp_next); 11941 asoc->ctrl_queue_cnt++; 11942 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 11943 return (0); 11944 } 11945 11946 void 11947 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst, 11948 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, 11949 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, 11950 uint32_t vrf_id, uint16_t port) 11951 { 11952 /* Don't respond to an ABORT with an ABORT. */ 11953 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) { 11954 if (cause) 11955 sctp_m_freem(cause); 11956 return; 11957 } 11958 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause, 11959 mflowtype, mflowid, fibnum, 11960 vrf_id, port); 11961 return; 11962 } 11963 11964 void 11965 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst, 11966 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, 11967 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, 11968 uint32_t vrf_id, uint16_t port) 11969 { 11970 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause, 11971 mflowtype, mflowid, fibnum, 11972 vrf_id, port); 11973 return; 11974 } 11975 11976 static struct mbuf * 11977 sctp_copy_resume(struct uio *uio, 11978 int max_send_len, 11979 int user_marks_eor, 11980 int *error, 11981 uint32_t * sndout, 11982 struct mbuf **new_tail) 11983 { 11984 struct mbuf *m; 11985 11986 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0, 11987 (M_PKTHDR | (user_marks_eor ? M_EOR : 0))); 11988 if (m == NULL) { 11989 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); 11990 *error = ENOBUFS; 11991 } else { 11992 *sndout = m_length(m, NULL); 11993 *new_tail = m_last(m); 11994 } 11995 return (m); 11996 } 11997 11998 static int 11999 sctp_copy_one(struct sctp_stream_queue_pending *sp, 12000 struct uio *uio, 12001 int resv_upfront) 12002 { 12003 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length, 12004 resv_upfront, 0); 12005 if (sp->data == NULL) { 12006 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); 12007 return (ENOBUFS); 12008 } 12009 sp->tail_mbuf = m_last(sp->data); 12010 return (0); 12011 } 12012 12013 12014 12015 static struct sctp_stream_queue_pending * 12016 sctp_copy_it_in(struct sctp_tcb *stcb, 12017 struct sctp_association *asoc, 12018 struct sctp_sndrcvinfo *srcv, 12019 struct uio *uio, 12020 struct sctp_nets *net, 12021 int max_send_len, 12022 int user_marks_eor, 12023 int *error) 12024 { 12025 /*- 12026 * This routine must be very careful in its work. Protocol 12027 * processing is up and running so care must be taken to spl...() 12028 * when you need to do something that may effect the stcb/asoc. The 12029 * sb is locked however. When data is copied the protocol processing 12030 * should be enabled since this is a slower operation... 12031 */ 12032 struct sctp_stream_queue_pending *sp = NULL; 12033 int resv_in_first; 12034 12035 *error = 0; 12036 /* Now can we send this? */ 12037 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 12038 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 12039 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 12040 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 12041 /* got data while shutting down */ 12042 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12043 *error = ECONNRESET; 12044 goto out_now; 12045 } 12046 sctp_alloc_a_strmoq(stcb, sp); 12047 if (sp == NULL) { 12048 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12049 *error = ENOMEM; 12050 goto out_now; 12051 } 12052 sp->act_flags = 0; 12053 sp->sender_all_done = 0; 12054 sp->sinfo_flags = srcv->sinfo_flags; 12055 sp->timetolive = srcv->sinfo_timetolive; 12056 sp->ppid = srcv->sinfo_ppid; 12057 sp->context = srcv->sinfo_context; 12058 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 12059 12060 sp->stream = srcv->sinfo_stream; 12061 sp->length = min(uio->uio_resid, max_send_len); 12062 if ((sp->length == (uint32_t) uio->uio_resid) && 12063 ((user_marks_eor == 0) || 12064 (srcv->sinfo_flags & SCTP_EOF) || 12065 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { 12066 sp->msg_is_complete = 1; 12067 } else { 12068 sp->msg_is_complete = 0; 12069 } 12070 sp->sender_all_done = 0; 12071 sp->some_taken = 0; 12072 sp->put_last_out = 0; 12073 resv_in_first = sizeof(struct sctp_data_chunk); 12074 sp->data = sp->tail_mbuf = NULL; 12075 if (sp->length == 0) { 12076 *error = 0; 12077 goto skip_copy; 12078 } 12079 if (srcv->sinfo_keynumber_valid) { 12080 sp->auth_keyid = srcv->sinfo_keynumber; 12081 } else { 12082 sp->auth_keyid = stcb->asoc.authinfo.active_keyid; 12083 } 12084 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { 12085 sctp_auth_key_acquire(stcb, sp->auth_keyid); 12086 sp->holds_key_ref = 1; 12087 } 12088 *error = sctp_copy_one(sp, uio, resv_in_first); 12089 skip_copy: 12090 if (*error) { 12091 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 12092 sp = NULL; 12093 } else { 12094 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 12095 sp->net = net; 12096 atomic_add_int(&sp->net->ref_count, 1); 12097 } else { 12098 sp->net = NULL; 12099 } 12100 sctp_set_prsctp_policy(sp); 12101 } 12102 out_now: 12103 return (sp); 12104 } 12105 12106 12107 int 12108 sctp_sosend(struct socket *so, 12109 struct sockaddr *addr, 12110 struct uio *uio, 12111 struct mbuf *top, 12112 struct mbuf *control, 12113 int flags, 12114 struct thread *p 12115 ) 12116 { 12117 int error, use_sndinfo = 0; 12118 struct sctp_sndrcvinfo sndrcvninfo; 12119 struct sockaddr *addr_to_use; 12120 12121 #if defined(INET) && defined(INET6) 12122 struct sockaddr_in sin; 12123 12124 #endif 12125 12126 if (control) { 12127 /* process cmsg snd/rcv info (maybe a assoc-id) */ 12128 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control, 12129 sizeof(sndrcvninfo))) { 12130 /* got one */ 12131 use_sndinfo = 1; 12132 } 12133 } 12134 addr_to_use = addr; 12135 #if defined(INET) && defined(INET6) 12136 if ((addr) && (addr->sa_family == AF_INET6)) { 12137 struct sockaddr_in6 *sin6; 12138 12139 sin6 = (struct sockaddr_in6 *)addr; 12140 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 12141 in6_sin6_2_sin(&sin, sin6); 12142 addr_to_use = (struct sockaddr *)&sin; 12143 } 12144 } 12145 #endif 12146 error = sctp_lower_sosend(so, addr_to_use, uio, top, 12147 control, 12148 flags, 12149 use_sndinfo ? &sndrcvninfo : NULL 12150 ,p 12151 ); 12152 return (error); 12153 } 12154 12155 12156 int 12157 sctp_lower_sosend(struct socket *so, 12158 struct sockaddr *addr, 12159 struct uio *uio, 12160 struct mbuf *i_pak, 12161 struct mbuf *control, 12162 int flags, 12163 struct sctp_sndrcvinfo *srcv 12164 , 12165 struct thread *p 12166 ) 12167 { 12168 unsigned int sndlen = 0, max_len; 12169 int error, len; 12170 struct mbuf *top = NULL; 12171 int queue_only = 0, queue_only_for_init = 0; 12172 int free_cnt_applied = 0; 12173 int un_sent; 12174 int now_filled = 0; 12175 unsigned int inqueue_bytes = 0; 12176 struct sctp_block_entry be; 12177 struct sctp_inpcb *inp; 12178 struct sctp_tcb *stcb = NULL; 12179 struct timeval now; 12180 struct sctp_nets *net; 12181 struct sctp_association *asoc; 12182 struct sctp_inpcb *t_inp; 12183 int user_marks_eor; 12184 int create_lock_applied = 0; 12185 int nagle_applies = 0; 12186 int some_on_control = 0; 12187 int got_all_of_the_send = 0; 12188 int hold_tcblock = 0; 12189 int non_blocking = 0; 12190 uint32_t local_add_more, local_soresv = 0; 12191 uint16_t port; 12192 uint16_t sinfo_flags; 12193 sctp_assoc_t sinfo_assoc_id; 12194 12195 error = 0; 12196 net = NULL; 12197 stcb = NULL; 12198 asoc = NULL; 12199 12200 t_inp = inp = (struct sctp_inpcb *)so->so_pcb; 12201 if (inp == NULL) { 12202 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12203 error = EINVAL; 12204 if (i_pak) { 12205 SCTP_RELEASE_PKT(i_pak); 12206 } 12207 return (error); 12208 } 12209 if ((uio == NULL) && (i_pak == NULL)) { 12210 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12211 return (EINVAL); 12212 } 12213 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR); 12214 atomic_add_int(&inp->total_sends, 1); 12215 if (uio) { 12216 if (uio->uio_resid < 0) { 12217 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12218 return (EINVAL); 12219 } 12220 sndlen = uio->uio_resid; 12221 } else { 12222 top = SCTP_HEADER_TO_CHAIN(i_pak); 12223 sndlen = SCTP_HEADER_LEN(i_pak); 12224 } 12225 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n", 12226 (void *)addr, 12227 sndlen); 12228 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 12229 (inp->sctp_socket->so_qlimit)) { 12230 /* The listener can NOT send */ 12231 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); 12232 error = ENOTCONN; 12233 goto out_unlocked; 12234 } 12235 /** 12236 * Pre-screen address, if one is given the sin-len 12237 * must be set correctly! 12238 */ 12239 if (addr) { 12240 union sctp_sockstore *raddr = (union sctp_sockstore *)addr; 12241 12242 switch (raddr->sa.sa_family) { 12243 #ifdef INET 12244 case AF_INET: 12245 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) { 12246 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12247 error = EINVAL; 12248 goto out_unlocked; 12249 } 12250 port = raddr->sin.sin_port; 12251 break; 12252 #endif 12253 #ifdef INET6 12254 case AF_INET6: 12255 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) { 12256 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12257 error = EINVAL; 12258 goto out_unlocked; 12259 } 12260 port = raddr->sin6.sin6_port; 12261 break; 12262 #endif 12263 default: 12264 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT); 12265 error = EAFNOSUPPORT; 12266 goto out_unlocked; 12267 } 12268 } else 12269 port = 0; 12270 12271 if (srcv) { 12272 sinfo_flags = srcv->sinfo_flags; 12273 sinfo_assoc_id = srcv->sinfo_assoc_id; 12274 if (INVALID_SINFO_FLAG(sinfo_flags) || 12275 PR_SCTP_INVALID_POLICY(sinfo_flags)) { 12276 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12277 error = EINVAL; 12278 goto out_unlocked; 12279 } 12280 if (srcv->sinfo_flags) 12281 SCTP_STAT_INCR(sctps_sends_with_flags); 12282 } else { 12283 sinfo_flags = inp->def_send.sinfo_flags; 12284 sinfo_assoc_id = inp->def_send.sinfo_assoc_id; 12285 } 12286 if (sinfo_flags & SCTP_SENDALL) { 12287 /* its a sendall */ 12288 error = sctp_sendall(inp, uio, top, srcv); 12289 top = NULL; 12290 goto out_unlocked; 12291 } 12292 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) { 12293 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12294 error = EINVAL; 12295 goto out_unlocked; 12296 } 12297 /* now we must find the assoc */ 12298 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) || 12299 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 12300 SCTP_INP_RLOCK(inp); 12301 stcb = LIST_FIRST(&inp->sctp_asoc_list); 12302 if (stcb) { 12303 SCTP_TCB_LOCK(stcb); 12304 hold_tcblock = 1; 12305 } 12306 SCTP_INP_RUNLOCK(inp); 12307 } else if (sinfo_assoc_id) { 12308 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0); 12309 } else if (addr) { 12310 /*- 12311 * Since we did not use findep we must 12312 * increment it, and if we don't find a tcb 12313 * decrement it. 12314 */ 12315 SCTP_INP_WLOCK(inp); 12316 SCTP_INP_INCR_REF(inp); 12317 SCTP_INP_WUNLOCK(inp); 12318 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 12319 if (stcb == NULL) { 12320 SCTP_INP_WLOCK(inp); 12321 SCTP_INP_DECR_REF(inp); 12322 SCTP_INP_WUNLOCK(inp); 12323 } else { 12324 hold_tcblock = 1; 12325 } 12326 } 12327 if ((stcb == NULL) && (addr)) { 12328 /* Possible implicit send? */ 12329 SCTP_ASOC_CREATE_LOCK(inp); 12330 create_lock_applied = 1; 12331 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || 12332 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 12333 /* Should I really unlock ? */ 12334 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12335 error = EINVAL; 12336 goto out_unlocked; 12337 12338 } 12339 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) && 12340 (addr->sa_family == AF_INET6)) { 12341 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12342 error = EINVAL; 12343 goto out_unlocked; 12344 } 12345 SCTP_INP_WLOCK(inp); 12346 SCTP_INP_INCR_REF(inp); 12347 SCTP_INP_WUNLOCK(inp); 12348 /* With the lock applied look again */ 12349 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 12350 if ((stcb == NULL) && (control != NULL) && (port > 0)) { 12351 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error); 12352 } 12353 if (stcb == NULL) { 12354 SCTP_INP_WLOCK(inp); 12355 SCTP_INP_DECR_REF(inp); 12356 SCTP_INP_WUNLOCK(inp); 12357 } else { 12358 hold_tcblock = 1; 12359 } 12360 if (error) { 12361 goto out_unlocked; 12362 } 12363 if (t_inp != inp) { 12364 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); 12365 error = ENOTCONN; 12366 goto out_unlocked; 12367 } 12368 } 12369 if (stcb == NULL) { 12370 if (addr == NULL) { 12371 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); 12372 error = ENOENT; 12373 goto out_unlocked; 12374 } else { 12375 /* We must go ahead and start the INIT process */ 12376 uint32_t vrf_id; 12377 12378 if ((sinfo_flags & SCTP_ABORT) || 12379 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) { 12380 /*- 12381 * User asks to abort a non-existant assoc, 12382 * or EOF a non-existant assoc with no data 12383 */ 12384 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); 12385 error = ENOENT; 12386 goto out_unlocked; 12387 } 12388 /* get an asoc/stcb struct */ 12389 vrf_id = inp->def_vrf_id; 12390 #ifdef INVARIANTS 12391 if (create_lock_applied == 0) { 12392 panic("Error, should hold create lock and I don't?"); 12393 } 12394 #endif 12395 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 12396 p 12397 ); 12398 if (stcb == NULL) { 12399 /* Error is setup for us in the call */ 12400 goto out_unlocked; 12401 } 12402 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 12403 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 12404 /* 12405 * Set the connected flag so we can queue 12406 * data 12407 */ 12408 soisconnecting(so); 12409 } 12410 hold_tcblock = 1; 12411 if (create_lock_applied) { 12412 SCTP_ASOC_CREATE_UNLOCK(inp); 12413 create_lock_applied = 0; 12414 } else { 12415 SCTP_PRINTF("Huh-3? create lock should have been on??\n"); 12416 } 12417 /* 12418 * Turn on queue only flag to prevent data from 12419 * being sent 12420 */ 12421 queue_only = 1; 12422 asoc = &stcb->asoc; 12423 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); 12424 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 12425 12426 /* initialize authentication params for the assoc */ 12427 sctp_initialize_auth_params(inp, stcb); 12428 12429 if (control) { 12430 if (sctp_process_cmsgs_for_init(stcb, control, &error)) { 12431 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, 12432 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5); 12433 hold_tcblock = 0; 12434 stcb = NULL; 12435 goto out_unlocked; 12436 } 12437 } 12438 /* out with the INIT */ 12439 queue_only_for_init = 1; 12440 /*- 12441 * we may want to dig in after this call and adjust the MTU 12442 * value. It defaulted to 1500 (constant) but the ro 12443 * structure may now have an update and thus we may need to 12444 * change it BEFORE we append the message. 12445 */ 12446 } 12447 } else 12448 asoc = &stcb->asoc; 12449 if (srcv == NULL) 12450 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send; 12451 if (srcv->sinfo_flags & SCTP_ADDR_OVER) { 12452 if (addr) 12453 net = sctp_findnet(stcb, addr); 12454 else 12455 net = NULL; 12456 if ((net == NULL) || 12457 ((port != 0) && (port != stcb->rport))) { 12458 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12459 error = EINVAL; 12460 goto out_unlocked; 12461 } 12462 } else { 12463 if (stcb->asoc.alternate) { 12464 net = stcb->asoc.alternate; 12465 } else { 12466 net = stcb->asoc.primary_destination; 12467 } 12468 } 12469 atomic_add_int(&stcb->total_sends, 1); 12470 /* Keep the stcb from being freed under our feet */ 12471 atomic_add_int(&asoc->refcnt, 1); 12472 free_cnt_applied = 1; 12473 12474 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) { 12475 if (sndlen > asoc->smallest_mtu) { 12476 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12477 error = EMSGSIZE; 12478 goto out_unlocked; 12479 } 12480 } 12481 if (SCTP_SO_IS_NBIO(so) 12482 || (flags & MSG_NBIO) 12483 ) { 12484 non_blocking = 1; 12485 } 12486 /* would we block? */ 12487 if (non_blocking) { 12488 if (hold_tcblock == 0) { 12489 SCTP_TCB_LOCK(stcb); 12490 hold_tcblock = 1; 12491 } 12492 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12493 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) || 12494 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12495 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK); 12496 if (sndlen > SCTP_SB_LIMIT_SND(so)) 12497 error = EMSGSIZE; 12498 else 12499 error = EWOULDBLOCK; 12500 goto out_unlocked; 12501 } 12502 stcb->asoc.sb_send_resv += sndlen; 12503 SCTP_TCB_UNLOCK(stcb); 12504 hold_tcblock = 0; 12505 } else { 12506 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen); 12507 } 12508 local_soresv = sndlen; 12509 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12510 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12511 error = ECONNRESET; 12512 goto out_unlocked; 12513 } 12514 if (create_lock_applied) { 12515 SCTP_ASOC_CREATE_UNLOCK(inp); 12516 create_lock_applied = 0; 12517 } 12518 if (asoc->stream_reset_outstanding) { 12519 /* 12520 * Can't queue any data while stream reset is underway. 12521 */ 12522 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN); 12523 error = EAGAIN; 12524 goto out_unlocked; 12525 } 12526 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 12527 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 12528 queue_only = 1; 12529 } 12530 /* we are now done with all control */ 12531 if (control) { 12532 sctp_m_freem(control); 12533 control = NULL; 12534 } 12535 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 12536 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 12537 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 12538 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 12539 if (srcv->sinfo_flags & SCTP_ABORT) { 12540 ; 12541 } else { 12542 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12543 error = ECONNRESET; 12544 goto out_unlocked; 12545 } 12546 } 12547 /* Ok, we will attempt a msgsnd :> */ 12548 if (p) { 12549 p->td_ru.ru_msgsnd++; 12550 } 12551 /* Are we aborting? */ 12552 if (srcv->sinfo_flags & SCTP_ABORT) { 12553 struct mbuf *mm; 12554 int tot_demand, tot_out = 0, max_out; 12555 12556 SCTP_STAT_INCR(sctps_sends_with_abort); 12557 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 12558 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 12559 /* It has to be up before we abort */ 12560 /* how big is the user initiated abort? */ 12561 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12562 error = EINVAL; 12563 goto out; 12564 } 12565 if (hold_tcblock) { 12566 SCTP_TCB_UNLOCK(stcb); 12567 hold_tcblock = 0; 12568 } 12569 if (top) { 12570 struct mbuf *cntm = NULL; 12571 12572 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA); 12573 if (sndlen != 0) { 12574 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) { 12575 tot_out += SCTP_BUF_LEN(cntm); 12576 } 12577 } 12578 } else { 12579 /* Must fit in a MTU */ 12580 tot_out = sndlen; 12581 tot_demand = (tot_out + sizeof(struct sctp_paramhdr)); 12582 if (tot_demand > SCTP_DEFAULT_ADD_MORE) { 12583 /* To big */ 12584 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12585 error = EMSGSIZE; 12586 goto out; 12587 } 12588 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA); 12589 } 12590 if (mm == NULL) { 12591 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12592 error = ENOMEM; 12593 goto out; 12594 } 12595 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr); 12596 max_out -= sizeof(struct sctp_abort_msg); 12597 if (tot_out > max_out) { 12598 tot_out = max_out; 12599 } 12600 if (mm) { 12601 struct sctp_paramhdr *ph; 12602 12603 /* now move forward the data pointer */ 12604 ph = mtod(mm, struct sctp_paramhdr *); 12605 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 12606 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out); 12607 ph++; 12608 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr); 12609 if (top == NULL) { 12610 error = uiomove((caddr_t)ph, (int)tot_out, uio); 12611 if (error) { 12612 /*- 12613 * Here if we can't get his data we 12614 * still abort we just don't get to 12615 * send the users note :-0 12616 */ 12617 sctp_m_freem(mm); 12618 mm = NULL; 12619 } 12620 } else { 12621 if (sndlen != 0) { 12622 SCTP_BUF_NEXT(mm) = top; 12623 } 12624 } 12625 } 12626 if (hold_tcblock == 0) { 12627 SCTP_TCB_LOCK(stcb); 12628 } 12629 atomic_add_int(&stcb->asoc.refcnt, -1); 12630 free_cnt_applied = 0; 12631 /* release this lock, otherwise we hang on ourselves */ 12632 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED); 12633 /* now relock the stcb so everything is sane */ 12634 hold_tcblock = 0; 12635 stcb = NULL; 12636 /* 12637 * In this case top is already chained to mm avoid double 12638 * free, since we free it below if top != NULL and driver 12639 * would free it after sending the packet out 12640 */ 12641 if (sndlen != 0) { 12642 top = NULL; 12643 } 12644 goto out_unlocked; 12645 } 12646 /* Calculate the maximum we can send */ 12647 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12648 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { 12649 if (non_blocking) { 12650 /* we already checked for non-blocking above. */ 12651 max_len = sndlen; 12652 } else { 12653 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 12654 } 12655 } else { 12656 max_len = 0; 12657 } 12658 if (hold_tcblock) { 12659 SCTP_TCB_UNLOCK(stcb); 12660 hold_tcblock = 0; 12661 } 12662 /* Is the stream no. valid? */ 12663 if (srcv->sinfo_stream >= asoc->streamoutcnt) { 12664 /* Invalid stream number */ 12665 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12666 error = EINVAL; 12667 goto out_unlocked; 12668 } 12669 if (asoc->strmout == NULL) { 12670 /* huh? software error */ 12671 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 12672 error = EFAULT; 12673 goto out_unlocked; 12674 } 12675 /* Unless E_EOR mode is on, we must make a send FIT in one call. */ 12676 if ((user_marks_eor == 0) && 12677 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) { 12678 /* It will NEVER fit */ 12679 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12680 error = EMSGSIZE; 12681 goto out_unlocked; 12682 } 12683 if ((uio == NULL) && user_marks_eor) { 12684 /*- 12685 * We do not support eeor mode for 12686 * sending with mbuf chains (like sendfile). 12687 */ 12688 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12689 error = EINVAL; 12690 goto out_unlocked; 12691 } 12692 if (user_marks_eor) { 12693 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold)); 12694 } else { 12695 /*- 12696 * For non-eeor the whole message must fit in 12697 * the socket send buffer. 12698 */ 12699 local_add_more = sndlen; 12700 } 12701 len = 0; 12702 if (non_blocking) { 12703 goto skip_preblock; 12704 } 12705 if (((max_len <= local_add_more) && 12706 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) || 12707 (max_len == 0) || 12708 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12709 /* No room right now ! */ 12710 SOCKBUF_LOCK(&so->so_snd); 12711 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12712 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) || 12713 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12714 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n", 12715 (unsigned int)SCTP_SB_LIMIT_SND(so), 12716 inqueue_bytes, 12717 local_add_more, 12718 stcb->asoc.stream_queue_cnt, 12719 stcb->asoc.chunks_on_out_queue, 12720 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue)); 12721 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 12722 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen); 12723 } 12724 be.error = 0; 12725 stcb->block_entry = &be; 12726 error = sbwait(&so->so_snd); 12727 stcb->block_entry = NULL; 12728 if (error || so->so_error || be.error) { 12729 if (error == 0) { 12730 if (so->so_error) 12731 error = so->so_error; 12732 if (be.error) { 12733 error = be.error; 12734 } 12735 } 12736 SOCKBUF_UNLOCK(&so->so_snd); 12737 goto out_unlocked; 12738 } 12739 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 12740 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 12741 asoc, stcb->asoc.total_output_queue_size); 12742 } 12743 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12744 goto out_unlocked; 12745 } 12746 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12747 } 12748 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { 12749 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 12750 } else { 12751 max_len = 0; 12752 } 12753 SOCKBUF_UNLOCK(&so->so_snd); 12754 } 12755 skip_preblock: 12756 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12757 goto out_unlocked; 12758 } 12759 /* 12760 * sndlen covers for mbuf case uio_resid covers for the non-mbuf 12761 * case NOTE: uio will be null when top/mbuf is passed 12762 */ 12763 if (sndlen == 0) { 12764 if (srcv->sinfo_flags & SCTP_EOF) { 12765 got_all_of_the_send = 1; 12766 goto dataless_eof; 12767 } else { 12768 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12769 error = EINVAL; 12770 goto out; 12771 } 12772 } 12773 if (top == NULL) { 12774 struct sctp_stream_queue_pending *sp; 12775 struct sctp_stream_out *strm; 12776 uint32_t sndout; 12777 12778 SCTP_TCB_SEND_LOCK(stcb); 12779 if ((asoc->stream_locked) && 12780 (asoc->stream_locked_on != srcv->sinfo_stream)) { 12781 SCTP_TCB_SEND_UNLOCK(stcb); 12782 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12783 error = EINVAL; 12784 goto out; 12785 } 12786 SCTP_TCB_SEND_UNLOCK(stcb); 12787 12788 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 12789 if (strm->last_msg_incomplete == 0) { 12790 do_a_copy_in: 12791 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error); 12792 if ((sp == NULL) || (error)) { 12793 goto out; 12794 } 12795 SCTP_TCB_SEND_LOCK(stcb); 12796 if (sp->msg_is_complete) { 12797 strm->last_msg_incomplete = 0; 12798 asoc->stream_locked = 0; 12799 } else { 12800 /* 12801 * Just got locked to this guy in case of an 12802 * interrupt. 12803 */ 12804 strm->last_msg_incomplete = 1; 12805 asoc->stream_locked = 1; 12806 asoc->stream_locked_on = srcv->sinfo_stream; 12807 sp->sender_all_done = 0; 12808 } 12809 sctp_snd_sb_alloc(stcb, sp->length); 12810 atomic_add_int(&asoc->stream_queue_cnt, 1); 12811 if (srcv->sinfo_flags & SCTP_UNORDERED) { 12812 SCTP_STAT_INCR(sctps_sends_with_unord); 12813 } 12814 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 12815 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1); 12816 SCTP_TCB_SEND_UNLOCK(stcb); 12817 } else { 12818 SCTP_TCB_SEND_LOCK(stcb); 12819 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead); 12820 SCTP_TCB_SEND_UNLOCK(stcb); 12821 if (sp == NULL) { 12822 /* ???? Huh ??? last msg is gone */ 12823 #ifdef INVARIANTS 12824 panic("Warning: Last msg marked incomplete, yet nothing left?"); 12825 #else 12826 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n"); 12827 strm->last_msg_incomplete = 0; 12828 #endif 12829 goto do_a_copy_in; 12830 12831 } 12832 } 12833 while (uio->uio_resid > 0) { 12834 /* How much room do we have? */ 12835 struct mbuf *new_tail, *mm; 12836 12837 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 12838 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size; 12839 else 12840 max_len = 0; 12841 12842 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) || 12843 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) || 12844 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) { 12845 sndout = 0; 12846 new_tail = NULL; 12847 if (hold_tcblock) { 12848 SCTP_TCB_UNLOCK(stcb); 12849 hold_tcblock = 0; 12850 } 12851 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail); 12852 if ((mm == NULL) || error) { 12853 if (mm) { 12854 sctp_m_freem(mm); 12855 } 12856 goto out; 12857 } 12858 /* Update the mbuf and count */ 12859 SCTP_TCB_SEND_LOCK(stcb); 12860 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12861 /* 12862 * we need to get out. Peer probably 12863 * aborted. 12864 */ 12865 sctp_m_freem(mm); 12866 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) { 12867 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12868 error = ECONNRESET; 12869 } 12870 SCTP_TCB_SEND_UNLOCK(stcb); 12871 goto out; 12872 } 12873 if (sp->tail_mbuf) { 12874 /* tack it to the end */ 12875 SCTP_BUF_NEXT(sp->tail_mbuf) = mm; 12876 sp->tail_mbuf = new_tail; 12877 } else { 12878 /* A stolen mbuf */ 12879 sp->data = mm; 12880 sp->tail_mbuf = new_tail; 12881 } 12882 sctp_snd_sb_alloc(stcb, sndout); 12883 atomic_add_int(&sp->length, sndout); 12884 len += sndout; 12885 12886 /* Did we reach EOR? */ 12887 if ((uio->uio_resid == 0) && 12888 ((user_marks_eor == 0) || 12889 (srcv->sinfo_flags & SCTP_EOF) || 12890 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { 12891 sp->msg_is_complete = 1; 12892 } else { 12893 sp->msg_is_complete = 0; 12894 } 12895 SCTP_TCB_SEND_UNLOCK(stcb); 12896 } 12897 if (uio->uio_resid == 0) { 12898 /* got it all? */ 12899 continue; 12900 } 12901 /* PR-SCTP? */ 12902 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) { 12903 /* 12904 * This is ugly but we must assure locking 12905 * order 12906 */ 12907 if (hold_tcblock == 0) { 12908 SCTP_TCB_LOCK(stcb); 12909 hold_tcblock = 1; 12910 } 12911 sctp_prune_prsctp(stcb, asoc, srcv, sndlen); 12912 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12913 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 12914 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 12915 else 12916 max_len = 0; 12917 if (max_len > 0) { 12918 continue; 12919 } 12920 SCTP_TCB_UNLOCK(stcb); 12921 hold_tcblock = 0; 12922 } 12923 /* wait for space now */ 12924 if (non_blocking) { 12925 /* Non-blocking io in place out */ 12926 goto skip_out_eof; 12927 } 12928 /* What about the INIT, send it maybe */ 12929 if (queue_only_for_init) { 12930 if (hold_tcblock == 0) { 12931 SCTP_TCB_LOCK(stcb); 12932 hold_tcblock = 1; 12933 } 12934 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 12935 /* a collision took us forward? */ 12936 queue_only = 0; 12937 } else { 12938 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 12939 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); 12940 queue_only = 1; 12941 } 12942 } 12943 if ((net->flight_size > net->cwnd) && 12944 (asoc->sctp_cmt_on_off == 0)) { 12945 SCTP_STAT_INCR(sctps_send_cwnd_avoid); 12946 queue_only = 1; 12947 } else if (asoc->ifp_had_enobuf) { 12948 SCTP_STAT_INCR(sctps_ifnomemqueued); 12949 if (net->flight_size > (2 * net->mtu)) { 12950 queue_only = 1; 12951 } 12952 asoc->ifp_had_enobuf = 0; 12953 } 12954 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 12955 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 12956 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 12957 (stcb->asoc.total_flight > 0) && 12958 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && 12959 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 12960 12961 /*- 12962 * Ok, Nagle is set on and we have data outstanding. 12963 * Don't send anything and let SACKs drive out the 12964 * data unless wen have a "full" segment to send. 12965 */ 12966 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 12967 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 12968 } 12969 SCTP_STAT_INCR(sctps_naglequeued); 12970 nagle_applies = 1; 12971 } else { 12972 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 12973 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 12974 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 12975 } 12976 SCTP_STAT_INCR(sctps_naglesent); 12977 nagle_applies = 0; 12978 } 12979 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 12980 12981 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, 12982 nagle_applies, un_sent); 12983 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, 12984 stcb->asoc.total_flight, 12985 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); 12986 } 12987 if (queue_only_for_init) 12988 queue_only_for_init = 0; 12989 if ((queue_only == 0) && (nagle_applies == 0)) { 12990 /*- 12991 * need to start chunk output 12992 * before blocking.. note that if 12993 * a lock is already applied, then 12994 * the input via the net is happening 12995 * and I don't need to start output :-D 12996 */ 12997 if (hold_tcblock == 0) { 12998 if (SCTP_TCB_TRYLOCK(stcb)) { 12999 hold_tcblock = 1; 13000 sctp_chunk_output(inp, 13001 stcb, 13002 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13003 } 13004 } else { 13005 sctp_chunk_output(inp, 13006 stcb, 13007 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13008 } 13009 if (hold_tcblock == 1) { 13010 SCTP_TCB_UNLOCK(stcb); 13011 hold_tcblock = 0; 13012 } 13013 } 13014 SOCKBUF_LOCK(&so->so_snd); 13015 /*- 13016 * This is a bit strange, but I think it will 13017 * work. The total_output_queue_size is locked and 13018 * protected by the TCB_LOCK, which we just released. 13019 * There is a race that can occur between releasing it 13020 * above, and me getting the socket lock, where sacks 13021 * come in but we have not put the SB_WAIT on the 13022 * so_snd buffer to get the wakeup. After the LOCK 13023 * is applied the sack_processing will also need to 13024 * LOCK the so->so_snd to do the actual sowwakeup(). So 13025 * once we have the socket buffer lock if we recheck the 13026 * size we KNOW we will get to sleep safely with the 13027 * wakeup flag in place. 13028 */ 13029 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size + 13030 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) { 13031 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13032 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK, 13033 asoc, uio->uio_resid); 13034 } 13035 be.error = 0; 13036 stcb->block_entry = &be; 13037 error = sbwait(&so->so_snd); 13038 stcb->block_entry = NULL; 13039 13040 if (error || so->so_error || be.error) { 13041 if (error == 0) { 13042 if (so->so_error) 13043 error = so->so_error; 13044 if (be.error) { 13045 error = be.error; 13046 } 13047 } 13048 SOCKBUF_UNLOCK(&so->so_snd); 13049 goto out_unlocked; 13050 } 13051 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13052 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 13053 asoc, stcb->asoc.total_output_queue_size); 13054 } 13055 } 13056 SOCKBUF_UNLOCK(&so->so_snd); 13057 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 13058 goto out_unlocked; 13059 } 13060 } 13061 SCTP_TCB_SEND_LOCK(stcb); 13062 if (sp) { 13063 if (sp->msg_is_complete == 0) { 13064 strm->last_msg_incomplete = 1; 13065 asoc->stream_locked = 1; 13066 asoc->stream_locked_on = srcv->sinfo_stream; 13067 } else { 13068 sp->sender_all_done = 1; 13069 strm->last_msg_incomplete = 0; 13070 asoc->stream_locked = 0; 13071 } 13072 } else { 13073 SCTP_PRINTF("Huh no sp TSNH?\n"); 13074 strm->last_msg_incomplete = 0; 13075 asoc->stream_locked = 0; 13076 } 13077 SCTP_TCB_SEND_UNLOCK(stcb); 13078 if (uio->uio_resid == 0) { 13079 got_all_of_the_send = 1; 13080 } 13081 } else { 13082 /* We send in a 0, since we do NOT have any locks */ 13083 error = sctp_msg_append(stcb, net, top, srcv, 0); 13084 top = NULL; 13085 if (srcv->sinfo_flags & SCTP_EOF) { 13086 /* 13087 * This should only happen for Panda for the mbuf 13088 * send case, which does NOT yet support EEOR mode. 13089 * Thus, we can just set this flag to do the proper 13090 * EOF handling. 13091 */ 13092 got_all_of_the_send = 1; 13093 } 13094 } 13095 if (error) { 13096 goto out; 13097 } 13098 dataless_eof: 13099 /* EOF thing ? */ 13100 if ((srcv->sinfo_flags & SCTP_EOF) && 13101 (got_all_of_the_send == 1)) { 13102 int cnt; 13103 13104 SCTP_STAT_INCR(sctps_sends_with_eof); 13105 error = 0; 13106 if (hold_tcblock == 0) { 13107 SCTP_TCB_LOCK(stcb); 13108 hold_tcblock = 1; 13109 } 13110 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED); 13111 if (TAILQ_EMPTY(&asoc->send_queue) && 13112 TAILQ_EMPTY(&asoc->sent_queue) && 13113 (cnt == 0)) { 13114 if (asoc->locked_on_sending) { 13115 goto abort_anyway; 13116 } 13117 /* there is nothing queued to send, so I'm done... */ 13118 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 13119 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 13120 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 13121 struct sctp_nets *netp; 13122 13123 /* only send SHUTDOWN the first time through */ 13124 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 13125 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 13126 } 13127 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 13128 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 13129 sctp_stop_timers_for_shutdown(stcb); 13130 if (stcb->asoc.alternate) { 13131 netp = stcb->asoc.alternate; 13132 } else { 13133 netp = stcb->asoc.primary_destination; 13134 } 13135 sctp_send_shutdown(stcb, netp); 13136 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 13137 netp); 13138 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 13139 asoc->primary_destination); 13140 } 13141 } else { 13142 /*- 13143 * we still got (or just got) data to send, so set 13144 * SHUTDOWN_PENDING 13145 */ 13146 /*- 13147 * XXX sockets draft says that SCTP_EOF should be 13148 * sent with no data. currently, we will allow user 13149 * data to be sent first and move to 13150 * SHUTDOWN-PENDING 13151 */ 13152 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 13153 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 13154 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 13155 if (hold_tcblock == 0) { 13156 SCTP_TCB_LOCK(stcb); 13157 hold_tcblock = 1; 13158 } 13159 if (asoc->locked_on_sending) { 13160 /* Locked to send out the data */ 13161 struct sctp_stream_queue_pending *sp; 13162 13163 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 13164 if (sp) { 13165 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 13166 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 13167 } 13168 } 13169 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 13170 if (TAILQ_EMPTY(&asoc->send_queue) && 13171 TAILQ_EMPTY(&asoc->sent_queue) && 13172 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 13173 abort_anyway: 13174 if (free_cnt_applied) { 13175 atomic_add_int(&stcb->asoc.refcnt, -1); 13176 free_cnt_applied = 0; 13177 } 13178 sctp_abort_an_association(stcb->sctp_ep, stcb, 13179 NULL, SCTP_SO_LOCKED); 13180 /* 13181 * now relock the stcb so everything 13182 * is sane 13183 */ 13184 hold_tcblock = 0; 13185 stcb = NULL; 13186 goto out; 13187 } 13188 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 13189 asoc->primary_destination); 13190 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY); 13191 } 13192 } 13193 } 13194 skip_out_eof: 13195 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { 13196 some_on_control = 1; 13197 } 13198 if (queue_only_for_init) { 13199 if (hold_tcblock == 0) { 13200 SCTP_TCB_LOCK(stcb); 13201 hold_tcblock = 1; 13202 } 13203 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 13204 /* a collision took us forward? */ 13205 queue_only = 0; 13206 } else { 13207 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 13208 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT); 13209 queue_only = 1; 13210 } 13211 } 13212 if ((net->flight_size > net->cwnd) && 13213 (stcb->asoc.sctp_cmt_on_off == 0)) { 13214 SCTP_STAT_INCR(sctps_send_cwnd_avoid); 13215 queue_only = 1; 13216 } else if (asoc->ifp_had_enobuf) { 13217 SCTP_STAT_INCR(sctps_ifnomemqueued); 13218 if (net->flight_size > (2 * net->mtu)) { 13219 queue_only = 1; 13220 } 13221 asoc->ifp_had_enobuf = 0; 13222 } 13223 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 13224 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 13225 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 13226 (stcb->asoc.total_flight > 0) && 13227 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && 13228 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 13229 /*- 13230 * Ok, Nagle is set on and we have data outstanding. 13231 * Don't send anything and let SACKs drive out the 13232 * data unless wen have a "full" segment to send. 13233 */ 13234 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13235 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 13236 } 13237 SCTP_STAT_INCR(sctps_naglequeued); 13238 nagle_applies = 1; 13239 } else { 13240 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13241 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 13242 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 13243 } 13244 SCTP_STAT_INCR(sctps_naglesent); 13245 nagle_applies = 0; 13246 } 13247 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13248 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, 13249 nagle_applies, un_sent); 13250 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, 13251 stcb->asoc.total_flight, 13252 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); 13253 } 13254 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) { 13255 /* we can attempt to send too. */ 13256 if (hold_tcblock == 0) { 13257 /* 13258 * If there is activity recv'ing sacks no need to 13259 * send 13260 */ 13261 if (SCTP_TCB_TRYLOCK(stcb)) { 13262 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13263 hold_tcblock = 1; 13264 } 13265 } else { 13266 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13267 } 13268 } else if ((queue_only == 0) && 13269 (stcb->asoc.peers_rwnd == 0) && 13270 (stcb->asoc.total_flight == 0)) { 13271 /* We get to have a probe outstanding */ 13272 if (hold_tcblock == 0) { 13273 hold_tcblock = 1; 13274 SCTP_TCB_LOCK(stcb); 13275 } 13276 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13277 } else if (some_on_control) { 13278 int num_out, reason, frag_point; 13279 13280 /* Here we do control only */ 13281 if (hold_tcblock == 0) { 13282 hold_tcblock = 1; 13283 SCTP_TCB_LOCK(stcb); 13284 } 13285 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 13286 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 13287 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED); 13288 } 13289 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n", 13290 queue_only, stcb->asoc.peers_rwnd, un_sent, 13291 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue, 13292 stcb->asoc.total_output_queue_size, error); 13293 13294 out: 13295 out_unlocked: 13296 13297 if (local_soresv && stcb) { 13298 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen); 13299 } 13300 if (create_lock_applied) { 13301 SCTP_ASOC_CREATE_UNLOCK(inp); 13302 } 13303 if ((stcb) && hold_tcblock) { 13304 SCTP_TCB_UNLOCK(stcb); 13305 } 13306 if (stcb && free_cnt_applied) { 13307 atomic_add_int(&stcb->asoc.refcnt, -1); 13308 } 13309 #ifdef INVARIANTS 13310 if (stcb) { 13311 if (mtx_owned(&stcb->tcb_mtx)) { 13312 panic("Leaving with tcb mtx owned?"); 13313 } 13314 if (mtx_owned(&stcb->tcb_send_mtx)) { 13315 panic("Leaving with tcb send mtx owned?"); 13316 } 13317 } 13318 #endif 13319 #ifdef INVARIANTS 13320 if (inp) { 13321 sctp_validate_no_locks(inp); 13322 } else { 13323 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n"); 13324 } 13325 #endif 13326 if (top) { 13327 sctp_m_freem(top); 13328 } 13329 if (control) { 13330 sctp_m_freem(control); 13331 } 13332 return (error); 13333 } 13334 13335 13336 /* 13337 * generate an AUTHentication chunk, if required 13338 */ 13339 struct mbuf * 13340 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end, 13341 struct sctp_auth_chunk **auth_ret, uint32_t * offset, 13342 struct sctp_tcb *stcb, uint8_t chunk) 13343 { 13344 struct mbuf *m_auth; 13345 struct sctp_auth_chunk *auth; 13346 int chunk_len; 13347 struct mbuf *cn; 13348 13349 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) || 13350 (stcb == NULL)) 13351 return (m); 13352 13353 if (stcb->asoc.auth_supported == 0) { 13354 return (m); 13355 } 13356 /* does the requested chunk require auth? */ 13357 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) { 13358 return (m); 13359 } 13360 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER); 13361 if (m_auth == NULL) { 13362 /* no mbuf's */ 13363 return (m); 13364 } 13365 /* reserve some space if this will be the first mbuf */ 13366 if (m == NULL) 13367 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD); 13368 /* fill in the AUTH chunk details */ 13369 auth = mtod(m_auth, struct sctp_auth_chunk *); 13370 bzero(auth, sizeof(*auth)); 13371 auth->ch.chunk_type = SCTP_AUTHENTICATION; 13372 auth->ch.chunk_flags = 0; 13373 chunk_len = sizeof(*auth) + 13374 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id); 13375 auth->ch.chunk_length = htons(chunk_len); 13376 auth->hmac_id = htons(stcb->asoc.peer_hmac_id); 13377 /* key id and hmac digest will be computed and filled in upon send */ 13378 13379 /* save the offset where the auth was inserted into the chain */ 13380 *offset = 0; 13381 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) { 13382 *offset += SCTP_BUF_LEN(cn); 13383 } 13384 13385 /* update length and return pointer to the auth chunk */ 13386 SCTP_BUF_LEN(m_auth) = chunk_len; 13387 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0); 13388 if (auth_ret != NULL) 13389 *auth_ret = auth; 13390 13391 return (m); 13392 } 13393 13394 #ifdef INET6 13395 int 13396 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro) 13397 { 13398 struct nd_prefix *pfx = NULL; 13399 struct nd_pfxrouter *pfxrtr = NULL; 13400 struct sockaddr_in6 gw6; 13401 13402 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6) 13403 return (0); 13404 13405 /* get prefix entry of address */ 13406 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) { 13407 if (pfx->ndpr_stateflags & NDPRF_DETACHED) 13408 continue; 13409 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr, 13410 &src6->sin6_addr, &pfx->ndpr_mask)) 13411 break; 13412 } 13413 /* no prefix entry in the prefix list */ 13414 if (pfx == NULL) { 13415 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for "); 13416 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); 13417 return (0); 13418 } 13419 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is "); 13420 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); 13421 13422 /* search installed gateway from prefix entry */ 13423 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) { 13424 memset(&gw6, 0, sizeof(struct sockaddr_in6)); 13425 gw6.sin6_family = AF_INET6; 13426 gw6.sin6_len = sizeof(struct sockaddr_in6); 13427 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr, 13428 sizeof(struct in6_addr)); 13429 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is "); 13430 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6); 13431 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is "); 13432 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); 13433 if (sctp_cmpaddr((struct sockaddr *)&gw6, 13434 ro->ro_rt->rt_gateway)) { 13435 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n"); 13436 return (1); 13437 } 13438 } 13439 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n"); 13440 return (0); 13441 } 13442 13443 #endif 13444 13445 int 13446 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro) 13447 { 13448 #ifdef INET 13449 struct sockaddr_in *sin, *mask; 13450 struct ifaddr *ifa; 13451 struct in_addr srcnetaddr, gwnetaddr; 13452 13453 if (ro == NULL || ro->ro_rt == NULL || 13454 sifa->address.sa.sa_family != AF_INET) { 13455 return (0); 13456 } 13457 ifa = (struct ifaddr *)sifa->ifa; 13458 mask = (struct sockaddr_in *)(ifa->ifa_netmask); 13459 sin = &sifa->address.sin; 13460 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); 13461 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is "); 13462 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa); 13463 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr); 13464 13465 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway; 13466 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); 13467 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is "); 13468 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); 13469 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr); 13470 if (srcnetaddr.s_addr == gwnetaddr.s_addr) { 13471 return (1); 13472 } 13473 #endif 13474 return (0); 13475 }
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