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/10.4/sys/netinet/sctp_output.c 296052 2016-02-25 18:46:06Z 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 __func__);
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 __func__);
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 (stcb) {
3226 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3227 stcb->asoc.scope.ipv4_local_scope = 1;
3228 retried = 1;
3229 goto again_with_private_addresses_allowed;
3230 } else if (retried == 1) {
3231 stcb->asoc.scope.ipv4_local_scope = 0;
3232 }
3233 }
3234 #endif
3235 out:
3236 #ifdef INET
3237 if (sifa) {
3238 if (retried == 1) {
3239 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3240 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3241 /* wrong base scope */
3242 continue;
3243 }
3244 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3245 struct sctp_ifa *tmp_sifa;
3246
3247 #ifdef INET
3248 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3249 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3250 &sctp_ifa->address.sin.sin_addr) != 0)) {
3251 continue;
3252 }
3253 #endif
3254 #ifdef INET6
3255 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3256 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3257 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3258 continue;
3259 }
3260 #endif
3261 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3262 (non_asoc_addr_ok == 0))
3263 continue;
3264 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3265 dest_is_loop,
3266 dest_is_priv, fam);
3267 if (tmp_sifa == NULL) {
3268 continue;
3269 }
3270 if (tmp_sifa == sifa) {
3271 continue;
3272 }
3273 if (stcb) {
3274 if (sctp_is_address_in_scope(tmp_sifa,
3275 &stcb->asoc.scope, 0) == 0) {
3276 continue;
3277 }
3278 if (((non_asoc_addr_ok == 0) &&
3279 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3280 (non_asoc_addr_ok &&
3281 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3282 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3283 /*
3284 * It is restricted
3285 * for some reason..
3286 * probably not yet
3287 * added.
3288 */
3289 continue;
3290 }
3291 }
3292 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3293 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3294 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3295 }
3296 }
3297 }
3298 }
3299 atomic_add_int(&sifa->refcount, 1);
3300 }
3301 #endif
3302 return (sifa);
3303 }
3304
3305
3306
3307 /* tcb may be NULL */
3308 struct sctp_ifa *
3309 sctp_source_address_selection(struct sctp_inpcb *inp,
3310 struct sctp_tcb *stcb,
3311 sctp_route_t * ro,
3312 struct sctp_nets *net,
3313 int non_asoc_addr_ok, uint32_t vrf_id)
3314 {
3315 struct sctp_ifa *answer;
3316 uint8_t dest_is_priv, dest_is_loop;
3317 sa_family_t fam;
3318
3319 #ifdef INET
3320 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3321
3322 #endif
3323 #ifdef INET6
3324 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3325
3326 #endif
3327
3328 /**
3329 * Rules: - Find the route if needed, cache if I can. - Look at
3330 * interface address in route, Is it in the bound list. If so we
3331 * have the best source. - If not we must rotate amongst the
3332 * addresses.
3333 *
3334 * Cavets and issues
3335 *
3336 * Do we need to pay attention to scope. We can have a private address
3337 * or a global address we are sourcing or sending to. So if we draw
3338 * it out
3339 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3340 * For V4
3341 * ------------------------------------------
3342 * source * dest * result
3343 * -----------------------------------------
3344 * <a> Private * Global * NAT
3345 * -----------------------------------------
3346 * <b> Private * Private * No problem
3347 * -----------------------------------------
3348 * <c> Global * Private * Huh, How will this work?
3349 * -----------------------------------------
3350 * <d> Global * Global * No Problem
3351 *------------------------------------------
3352 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3353 * For V6
3354 *------------------------------------------
3355 * source * dest * result
3356 * -----------------------------------------
3357 * <a> Linklocal * Global *
3358 * -----------------------------------------
3359 * <b> Linklocal * Linklocal * No problem
3360 * -----------------------------------------
3361 * <c> Global * Linklocal * Huh, How will this work?
3362 * -----------------------------------------
3363 * <d> Global * Global * No Problem
3364 *------------------------------------------
3365 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3366 *
3367 * And then we add to that what happens if there are multiple addresses
3368 * assigned to an interface. Remember the ifa on a ifn is a linked
3369 * list of addresses. So one interface can have more than one IP
3370 * address. What happens if we have both a private and a global
3371 * address? Do we then use context of destination to sort out which
3372 * one is best? And what about NAT's sending P->G may get you a NAT
3373 * translation, or should you select the G thats on the interface in
3374 * preference.
3375 *
3376 * Decisions:
3377 *
3378 * - count the number of addresses on the interface.
3379 * - if it is one, no problem except case <c>.
3380 * For <a> we will assume a NAT out there.
3381 * - if there are more than one, then we need to worry about scope P
3382 * or G. We should prefer G -> G and P -> P if possible.
3383 * Then as a secondary fall back to mixed types G->P being a last
3384 * ditch one.
3385 * - The above all works for bound all, but bound specific we need to
3386 * use the same concept but instead only consider the bound
3387 * addresses. If the bound set is NOT assigned to the interface then
3388 * we must use rotation amongst the bound addresses..
3389 */
3390 if (ro->ro_rt == NULL) {
3391 /*
3392 * Need a route to cache.
3393 */
3394 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
3395 }
3396 if (ro->ro_rt == NULL) {
3397 return (NULL);
3398 }
3399 fam = ro->ro_dst.sa_family;
3400 dest_is_priv = dest_is_loop = 0;
3401 /* Setup our scopes for the destination */
3402 switch (fam) {
3403 #ifdef INET
3404 case AF_INET:
3405 /* Scope based on outbound address */
3406 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3407 dest_is_loop = 1;
3408 if (net != NULL) {
3409 /* mark it as local */
3410 net->addr_is_local = 1;
3411 }
3412 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3413 dest_is_priv = 1;
3414 }
3415 break;
3416 #endif
3417 #ifdef INET6
3418 case AF_INET6:
3419 /* Scope based on outbound address */
3420 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3421 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3422 /*
3423 * If the address is a loopback address, which
3424 * consists of "::1" OR "fe80::1%lo0", we are
3425 * loopback scope. But we don't use dest_is_priv
3426 * (link local addresses).
3427 */
3428 dest_is_loop = 1;
3429 if (net != NULL) {
3430 /* mark it as local */
3431 net->addr_is_local = 1;
3432 }
3433 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3434 dest_is_priv = 1;
3435 }
3436 break;
3437 #endif
3438 }
3439 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3440 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3441 SCTP_IPI_ADDR_RLOCK();
3442 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3443 /*
3444 * Bound all case
3445 */
3446 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3447 dest_is_priv, dest_is_loop,
3448 non_asoc_addr_ok, fam);
3449 SCTP_IPI_ADDR_RUNLOCK();
3450 return (answer);
3451 }
3452 /*
3453 * Subset bound case
3454 */
3455 if (stcb) {
3456 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3457 vrf_id, dest_is_priv,
3458 dest_is_loop,
3459 non_asoc_addr_ok, fam);
3460 } else {
3461 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3462 non_asoc_addr_ok,
3463 dest_is_priv,
3464 dest_is_loop, fam);
3465 }
3466 SCTP_IPI_ADDR_RUNLOCK();
3467 return (answer);
3468 }
3469
3470 static int
3471 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3472 {
3473 struct cmsghdr cmh;
3474 int tlen, at, found;
3475 struct sctp_sndinfo sndinfo;
3476 struct sctp_prinfo prinfo;
3477 struct sctp_authinfo authinfo;
3478
3479 tlen = SCTP_BUF_LEN(control);
3480 at = 0;
3481 found = 0;
3482 /*
3483 * Independent of how many mbufs, find the c_type inside the control
3484 * structure and copy out the data.
3485 */
3486 while (at < tlen) {
3487 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3488 /* There is not enough room for one more. */
3489 return (found);
3490 }
3491 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3492 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3493 /* We dont't have a complete CMSG header. */
3494 return (found);
3495 }
3496 if (((int)cmh.cmsg_len + at) > tlen) {
3497 /* We don't have the complete CMSG. */
3498 return (found);
3499 }
3500 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3501 ((c_type == cmh.cmsg_type) ||
3502 ((c_type == SCTP_SNDRCV) &&
3503 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3504 (cmh.cmsg_type == SCTP_PRINFO) ||
3505 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3506 if (c_type == cmh.cmsg_type) {
3507 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
3508 return (found);
3509 }
3510 /* It is exactly what we want. Copy it out. */
3511 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data);
3512 return (1);
3513 } else {
3514 struct sctp_sndrcvinfo *sndrcvinfo;
3515
3516 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3517 if (found == 0) {
3518 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3519 return (found);
3520 }
3521 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3522 }
3523 switch (cmh.cmsg_type) {
3524 case SCTP_SNDINFO:
3525 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
3526 return (found);
3527 }
3528 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3529 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3530 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3531 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3532 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3533 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3534 break;
3535 case SCTP_PRINFO:
3536 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
3537 return (found);
3538 }
3539 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3540 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3541 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3542 } else {
3543 sndrcvinfo->sinfo_timetolive = 0;
3544 }
3545 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3546 break;
3547 case SCTP_AUTHINFO:
3548 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
3549 return (found);
3550 }
3551 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3552 sndrcvinfo->sinfo_keynumber_valid = 1;
3553 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3554 break;
3555 default:
3556 return (found);
3557 }
3558 found = 1;
3559 }
3560 }
3561 at += CMSG_ALIGN(cmh.cmsg_len);
3562 }
3563 return (found);
3564 }
3565
3566 static int
3567 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3568 {
3569 struct cmsghdr cmh;
3570 int tlen, at;
3571 struct sctp_initmsg initmsg;
3572
3573 #ifdef INET
3574 struct sockaddr_in sin;
3575
3576 #endif
3577 #ifdef INET6
3578 struct sockaddr_in6 sin6;
3579
3580 #endif
3581
3582 tlen = SCTP_BUF_LEN(control);
3583 at = 0;
3584 while (at < tlen) {
3585 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3586 /* There is not enough room for one more. */
3587 *error = EINVAL;
3588 return (1);
3589 }
3590 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3591 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3592 /* We dont't have a complete CMSG header. */
3593 *error = EINVAL;
3594 return (1);
3595 }
3596 if (((int)cmh.cmsg_len + at) > tlen) {
3597 /* We don't have the complete CMSG. */
3598 *error = EINVAL;
3599 return (1);
3600 }
3601 if (cmh.cmsg_level == IPPROTO_SCTP) {
3602 switch (cmh.cmsg_type) {
3603 case SCTP_INIT:
3604 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
3605 *error = EINVAL;
3606 return (1);
3607 }
3608 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3609 if (initmsg.sinit_max_attempts)
3610 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3611 if (initmsg.sinit_num_ostreams)
3612 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3613 if (initmsg.sinit_max_instreams)
3614 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3615 if (initmsg.sinit_max_init_timeo)
3616 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3617 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3618 struct sctp_stream_out *tmp_str;
3619 unsigned int i;
3620
3621 #if defined(SCTP_DETAILED_STR_STATS)
3622 int j;
3623
3624 #endif
3625
3626 /* Default is NOT correct */
3627 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3628 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3629 SCTP_TCB_UNLOCK(stcb);
3630 SCTP_MALLOC(tmp_str,
3631 struct sctp_stream_out *,
3632 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3633 SCTP_M_STRMO);
3634 SCTP_TCB_LOCK(stcb);
3635 if (tmp_str != NULL) {
3636 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3637 stcb->asoc.strmout = tmp_str;
3638 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3639 } else {
3640 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3641 }
3642 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3643 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3644 stcb->asoc.strmout[i].chunks_on_queues = 0;
3645 stcb->asoc.strmout[i].next_sequence_send = 0;
3646 #if defined(SCTP_DETAILED_STR_STATS)
3647 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3648 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3649 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3650 }
3651 #else
3652 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3653 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3654 #endif
3655 stcb->asoc.strmout[i].stream_no = i;
3656 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3657 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
3658 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3659 }
3660 }
3661 break;
3662 #ifdef INET
3663 case SCTP_DSTADDRV4:
3664 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3665 *error = EINVAL;
3666 return (1);
3667 }
3668 memset(&sin, 0, sizeof(struct sockaddr_in));
3669 sin.sin_family = AF_INET;
3670 sin.sin_len = sizeof(struct sockaddr_in);
3671 sin.sin_port = stcb->rport;
3672 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3673 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3674 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3675 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3676 *error = EINVAL;
3677 return (1);
3678 }
3679 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3680 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3681 *error = ENOBUFS;
3682 return (1);
3683 }
3684 break;
3685 #endif
3686 #ifdef INET6
3687 case SCTP_DSTADDRV6:
3688 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3689 *error = EINVAL;
3690 return (1);
3691 }
3692 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3693 sin6.sin6_family = AF_INET6;
3694 sin6.sin6_len = sizeof(struct sockaddr_in6);
3695 sin6.sin6_port = stcb->rport;
3696 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3697 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3698 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3699 *error = EINVAL;
3700 return (1);
3701 }
3702 #ifdef INET
3703 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3704 in6_sin6_2_sin(&sin, &sin6);
3705 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3706 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3707 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3708 *error = EINVAL;
3709 return (1);
3710 }
3711 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3712 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3713 *error = ENOBUFS;
3714 return (1);
3715 }
3716 } else
3717 #endif
3718 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
3719 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3720 *error = ENOBUFS;
3721 return (1);
3722 }
3723 break;
3724 #endif
3725 default:
3726 break;
3727 }
3728 }
3729 at += CMSG_ALIGN(cmh.cmsg_len);
3730 }
3731 return (0);
3732 }
3733
3734 static struct sctp_tcb *
3735 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3736 uint16_t port,
3737 struct mbuf *control,
3738 struct sctp_nets **net_p,
3739 int *error)
3740 {
3741 struct cmsghdr cmh;
3742 int tlen, at;
3743 struct sctp_tcb *stcb;
3744 struct sockaddr *addr;
3745
3746 #ifdef INET
3747 struct sockaddr_in sin;
3748
3749 #endif
3750 #ifdef INET6
3751 struct sockaddr_in6 sin6;
3752
3753 #endif
3754
3755 tlen = SCTP_BUF_LEN(control);
3756 at = 0;
3757 while (at < tlen) {
3758 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3759 /* There is not enough room for one more. */
3760 *error = EINVAL;
3761 return (NULL);
3762 }
3763 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3764 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3765 /* We dont't have a complete CMSG header. */
3766 *error = EINVAL;
3767 return (NULL);
3768 }
3769 if (((int)cmh.cmsg_len + at) > tlen) {
3770 /* We don't have the complete CMSG. */
3771 *error = EINVAL;
3772 return (NULL);
3773 }
3774 if (cmh.cmsg_level == IPPROTO_SCTP) {
3775 switch (cmh.cmsg_type) {
3776 #ifdef INET
3777 case SCTP_DSTADDRV4:
3778 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3779 *error = EINVAL;
3780 return (NULL);
3781 }
3782 memset(&sin, 0, sizeof(struct sockaddr_in));
3783 sin.sin_family = AF_INET;
3784 sin.sin_len = sizeof(struct sockaddr_in);
3785 sin.sin_port = port;
3786 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3787 addr = (struct sockaddr *)&sin;
3788 break;
3789 #endif
3790 #ifdef INET6
3791 case SCTP_DSTADDRV6:
3792 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3793 *error = EINVAL;
3794 return (NULL);
3795 }
3796 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3797 sin6.sin6_family = AF_INET6;
3798 sin6.sin6_len = sizeof(struct sockaddr_in6);
3799 sin6.sin6_port = port;
3800 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3801 #ifdef INET
3802 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3803 in6_sin6_2_sin(&sin, &sin6);
3804 addr = (struct sockaddr *)&sin;
3805 } else
3806 #endif
3807 addr = (struct sockaddr *)&sin6;
3808 break;
3809 #endif
3810 default:
3811 addr = NULL;
3812 break;
3813 }
3814 if (addr) {
3815 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3816 if (stcb != NULL) {
3817 return (stcb);
3818 }
3819 }
3820 }
3821 at += CMSG_ALIGN(cmh.cmsg_len);
3822 }
3823 return (NULL);
3824 }
3825
3826 static struct mbuf *
3827 sctp_add_cookie(struct mbuf *init, int init_offset,
3828 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3829 {
3830 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3831 struct sctp_state_cookie *stc;
3832 struct sctp_paramhdr *ph;
3833 uint8_t *foo;
3834 int sig_offset;
3835 uint16_t cookie_sz;
3836
3837 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3838 sizeof(struct sctp_paramhdr)), 0,
3839 M_NOWAIT, 1, MT_DATA);
3840 if (mret == NULL) {
3841 return (NULL);
3842 }
3843 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3844 if (copy_init == NULL) {
3845 sctp_m_freem(mret);
3846 return (NULL);
3847 }
3848 #ifdef SCTP_MBUF_LOGGING
3849 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3850 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3851 }
3852 #endif
3853 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3854 M_NOWAIT);
3855 if (copy_initack == NULL) {
3856 sctp_m_freem(mret);
3857 sctp_m_freem(copy_init);
3858 return (NULL);
3859 }
3860 #ifdef SCTP_MBUF_LOGGING
3861 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3862 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3863 }
3864 #endif
3865 /* easy side we just drop it on the end */
3866 ph = mtod(mret, struct sctp_paramhdr *);
3867 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3868 sizeof(struct sctp_paramhdr);
3869 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3870 sizeof(struct sctp_paramhdr));
3871 ph->param_type = htons(SCTP_STATE_COOKIE);
3872 ph->param_length = 0; /* fill in at the end */
3873 /* Fill in the stc cookie data */
3874 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3875
3876 /* tack the INIT and then the INIT-ACK onto the chain */
3877 cookie_sz = 0;
3878 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3879 cookie_sz += SCTP_BUF_LEN(m_at);
3880 if (SCTP_BUF_NEXT(m_at) == NULL) {
3881 SCTP_BUF_NEXT(m_at) = copy_init;
3882 break;
3883 }
3884 }
3885 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3886 cookie_sz += SCTP_BUF_LEN(m_at);
3887 if (SCTP_BUF_NEXT(m_at) == NULL) {
3888 SCTP_BUF_NEXT(m_at) = copy_initack;
3889 break;
3890 }
3891 }
3892 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3893 cookie_sz += SCTP_BUF_LEN(m_at);
3894 if (SCTP_BUF_NEXT(m_at) == NULL) {
3895 break;
3896 }
3897 }
3898 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3899 if (sig == NULL) {
3900 /* no space, so free the entire chain */
3901 sctp_m_freem(mret);
3902 return (NULL);
3903 }
3904 SCTP_BUF_LEN(sig) = 0;
3905 SCTP_BUF_NEXT(m_at) = sig;
3906 sig_offset = 0;
3907 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3908 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3909 *signature = foo;
3910 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3911 cookie_sz += SCTP_SIGNATURE_SIZE;
3912 ph->param_length = htons(cookie_sz);
3913 return (mret);
3914 }
3915
3916
3917 static uint8_t
3918 sctp_get_ect(struct sctp_tcb *stcb)
3919 {
3920 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3921 return (SCTP_ECT0_BIT);
3922 } else {
3923 return (0);
3924 }
3925 }
3926
3927 #if defined(INET) || defined(INET6)
3928 static void
3929 sctp_handle_no_route(struct sctp_tcb *stcb,
3930 struct sctp_nets *net,
3931 int so_locked)
3932 {
3933 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3934
3935 if (net) {
3936 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3937 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3938 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3939 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3940 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3941 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3942 stcb, 0,
3943 (void *)net,
3944 so_locked);
3945 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3946 net->dest_state &= ~SCTP_ADDR_PF;
3947 }
3948 }
3949 if (stcb) {
3950 if (net == stcb->asoc.primary_destination) {
3951 /* need a new primary */
3952 struct sctp_nets *alt;
3953
3954 alt = sctp_find_alternate_net(stcb, net, 0);
3955 if (alt != net) {
3956 if (stcb->asoc.alternate) {
3957 sctp_free_remote_addr(stcb->asoc.alternate);
3958 }
3959 stcb->asoc.alternate = alt;
3960 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3961 if (net->ro._s_addr) {
3962 sctp_free_ifa(net->ro._s_addr);
3963 net->ro._s_addr = NULL;
3964 }
3965 net->src_addr_selected = 0;
3966 }
3967 }
3968 }
3969 }
3970 }
3971
3972 #endif
3973
3974 static int
3975 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3976 struct sctp_tcb *stcb, /* may be NULL */
3977 struct sctp_nets *net,
3978 struct sockaddr *to,
3979 struct mbuf *m,
3980 uint32_t auth_offset,
3981 struct sctp_auth_chunk *auth,
3982 uint16_t auth_keyid,
3983 int nofragment_flag,
3984 int ecn_ok,
3985 int out_of_asoc_ok,
3986 uint16_t src_port,
3987 uint16_t dest_port,
3988 uint32_t v_tag,
3989 uint16_t port,
3990 union sctp_sockstore *over_addr,
3991 uint8_t mflowtype, uint32_t mflowid,
3992 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3993 int so_locked SCTP_UNUSED
3994 #else
3995 int so_locked
3996 #endif
3997 )
3998 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3999 {
4000 /**
4001 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
4002 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
4003 * - fill in the HMAC digest of any AUTH chunk in the packet.
4004 * - calculate and fill in the SCTP checksum.
4005 * - prepend an IP address header.
4006 * - if boundall use INADDR_ANY.
4007 * - if boundspecific do source address selection.
4008 * - set fragmentation option for ipV4.
4009 * - On return from IP output, check/adjust mtu size of output
4010 * interface and smallest_mtu size as well.
4011 */
4012 /* Will need ifdefs around this */
4013 struct mbuf *newm;
4014 struct sctphdr *sctphdr;
4015 int packet_length;
4016 int ret;
4017
4018 #if defined(INET) || defined(INET6)
4019 uint32_t vrf_id;
4020
4021 #endif
4022 #if defined(INET) || defined(INET6)
4023 struct mbuf *o_pak;
4024 sctp_route_t *ro = NULL;
4025 struct udphdr *udp = NULL;
4026
4027 #endif
4028 uint8_t tos_value;
4029
4030 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4031 struct socket *so = NULL;
4032
4033 #endif
4034
4035 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4036 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4037 sctp_m_freem(m);
4038 return (EFAULT);
4039 }
4040 #if defined(INET) || defined(INET6)
4041 if (stcb) {
4042 vrf_id = stcb->asoc.vrf_id;
4043 } else {
4044 vrf_id = inp->def_vrf_id;
4045 }
4046 #endif
4047 /* fill in the HMAC digest for any AUTH chunk in the packet */
4048 if ((auth != NULL) && (stcb != NULL)) {
4049 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4050 }
4051 if (net) {
4052 tos_value = net->dscp;
4053 } else if (stcb) {
4054 tos_value = stcb->asoc.default_dscp;
4055 } else {
4056 tos_value = inp->sctp_ep.default_dscp;
4057 }
4058
4059 switch (to->sa_family) {
4060 #ifdef INET
4061 case AF_INET:
4062 {
4063 struct ip *ip = NULL;
4064 sctp_route_t iproute;
4065 int len;
4066
4067 len = SCTP_MIN_V4_OVERHEAD;
4068 if (port) {
4069 len += sizeof(struct udphdr);
4070 }
4071 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4072 if (newm == NULL) {
4073 sctp_m_freem(m);
4074 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4075 return (ENOMEM);
4076 }
4077 SCTP_ALIGN_TO_END(newm, len);
4078 SCTP_BUF_LEN(newm) = len;
4079 SCTP_BUF_NEXT(newm) = m;
4080 m = newm;
4081 if (net != NULL) {
4082 m->m_pkthdr.flowid = net->flowid;
4083 M_HASHTYPE_SET(m, net->flowtype);
4084 } else {
4085 m->m_pkthdr.flowid = mflowid;
4086 M_HASHTYPE_SET(m, mflowtype);
4087 }
4088 packet_length = sctp_calculate_len(m);
4089 ip = mtod(m, struct ip *);
4090 ip->ip_v = IPVERSION;
4091 ip->ip_hl = (sizeof(struct ip) >> 2);
4092 if (tos_value == 0) {
4093 /*
4094 * This means especially, that it is not set
4095 * at the SCTP layer. So use the value from
4096 * the IP layer.
4097 */
4098 tos_value = inp->ip_inp.inp.inp_ip_tos;
4099 }
4100 tos_value &= 0xfc;
4101 if (ecn_ok) {
4102 tos_value |= sctp_get_ect(stcb);
4103 }
4104 if ((nofragment_flag) && (port == 0)) {
4105 ip->ip_off = htons(IP_DF);
4106 } else {
4107 ip->ip_off = htons(0);
4108 }
4109 /* FreeBSD has a function for ip_id's */
4110 ip->ip_id = ip_newid();
4111
4112 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4113 ip->ip_len = htons(packet_length);
4114 ip->ip_tos = tos_value;
4115 if (port) {
4116 ip->ip_p = IPPROTO_UDP;
4117 } else {
4118 ip->ip_p = IPPROTO_SCTP;
4119 }
4120 ip->ip_sum = 0;
4121 if (net == NULL) {
4122 ro = &iproute;
4123 memset(&iproute, 0, sizeof(iproute));
4124 memcpy(&ro->ro_dst, to, to->sa_len);
4125 } else {
4126 ro = (sctp_route_t *) & net->ro;
4127 }
4128 /* Now the address selection part */
4129 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4130
4131 /* call the routine to select the src address */
4132 if (net && out_of_asoc_ok == 0) {
4133 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4134 sctp_free_ifa(net->ro._s_addr);
4135 net->ro._s_addr = NULL;
4136 net->src_addr_selected = 0;
4137 if (ro->ro_rt) {
4138 RTFREE(ro->ro_rt);
4139 ro->ro_rt = NULL;
4140 }
4141 }
4142 if (net->src_addr_selected == 0) {
4143 /* Cache the source address */
4144 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4145 ro, net, 0,
4146 vrf_id);
4147 net->src_addr_selected = 1;
4148 }
4149 if (net->ro._s_addr == NULL) {
4150 /* No route to host */
4151 net->src_addr_selected = 0;
4152 sctp_handle_no_route(stcb, net, so_locked);
4153 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4154 sctp_m_freem(m);
4155 return (EHOSTUNREACH);
4156 }
4157 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4158 } else {
4159 if (over_addr == NULL) {
4160 struct sctp_ifa *_lsrc;
4161
4162 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4163 net,
4164 out_of_asoc_ok,
4165 vrf_id);
4166 if (_lsrc == NULL) {
4167 sctp_handle_no_route(stcb, net, so_locked);
4168 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4169 sctp_m_freem(m);
4170 return (EHOSTUNREACH);
4171 }
4172 ip->ip_src = _lsrc->address.sin.sin_addr;
4173 sctp_free_ifa(_lsrc);
4174 } else {
4175 ip->ip_src = over_addr->sin.sin_addr;
4176 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4177 }
4178 }
4179 if (port) {
4180 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4181 sctp_handle_no_route(stcb, net, so_locked);
4182 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4183 sctp_m_freem(m);
4184 return (EHOSTUNREACH);
4185 }
4186 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4187 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4188 udp->uh_dport = port;
4189 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4190 if (V_udp_cksum) {
4191 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4192 } else {
4193 udp->uh_sum = 0;
4194 }
4195 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4196 } else {
4197 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4198 }
4199
4200 sctphdr->src_port = src_port;
4201 sctphdr->dest_port = dest_port;
4202 sctphdr->v_tag = v_tag;
4203 sctphdr->checksum = 0;
4204
4205 /*
4206 * If source address selection fails and we find no
4207 * route then the ip_output should fail as well with
4208 * a NO_ROUTE_TO_HOST type error. We probably should
4209 * catch that somewhere and abort the association
4210 * right away (assuming this is an INIT being sent).
4211 */
4212 if (ro->ro_rt == NULL) {
4213 /*
4214 * src addr selection failed to find a route
4215 * (or valid source addr), so we can't get
4216 * there from here (yet)!
4217 */
4218 sctp_handle_no_route(stcb, net, so_locked);
4219 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4220 sctp_m_freem(m);
4221 return (EHOSTUNREACH);
4222 }
4223 if (ro != &iproute) {
4224 memcpy(&iproute, ro, sizeof(*ro));
4225 }
4226 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4227 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4228 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4229 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4230 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4231 (void *)ro->ro_rt);
4232
4233 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4234 /* failed to prepend data, give up */
4235 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4236 sctp_m_freem(m);
4237 return (ENOMEM);
4238 }
4239 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4240 if (port) {
4241 #if defined(SCTP_WITH_NO_CSUM)
4242 SCTP_STAT_INCR(sctps_sendnocrc);
4243 #else
4244 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4245 SCTP_STAT_INCR(sctps_sendswcrc);
4246 #endif
4247 if (V_udp_cksum) {
4248 SCTP_ENABLE_UDP_CSUM(o_pak);
4249 }
4250 } else {
4251 #if defined(SCTP_WITH_NO_CSUM)
4252 SCTP_STAT_INCR(sctps_sendnocrc);
4253 #else
4254 m->m_pkthdr.csum_flags = CSUM_SCTP;
4255 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4256 SCTP_STAT_INCR(sctps_sendhwcrc);
4257 #endif
4258 }
4259 #ifdef SCTP_PACKET_LOGGING
4260 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4261 sctp_packet_log(o_pak);
4262 #endif
4263 /* send it out. table id is taken from stcb */
4264 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4265 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4266 so = SCTP_INP_SO(inp);
4267 SCTP_SOCKET_UNLOCK(so, 0);
4268 }
4269 #endif
4270 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4271 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4272 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4273 atomic_add_int(&stcb->asoc.refcnt, 1);
4274 SCTP_TCB_UNLOCK(stcb);
4275 SCTP_SOCKET_LOCK(so, 0);
4276 SCTP_TCB_LOCK(stcb);
4277 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4278 }
4279 #endif
4280 SCTP_STAT_INCR(sctps_sendpackets);
4281 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4282 if (ret)
4283 SCTP_STAT_INCR(sctps_senderrors);
4284
4285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4286 if (net == NULL) {
4287 /* free tempy routes */
4288 RO_RTFREE(ro);
4289 } else {
4290 /*
4291 * PMTU check versus smallest asoc MTU goes
4292 * here
4293 */
4294 if ((ro->ro_rt != NULL) &&
4295 (net->ro._s_addr)) {
4296 uint32_t mtu;
4297
4298 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4299 if (net->port) {
4300 mtu -= sizeof(struct udphdr);
4301 }
4302 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4303 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4304 net->mtu = mtu;
4305 }
4306 } else if (ro->ro_rt == NULL) {
4307 /* route was freed */
4308 if (net->ro._s_addr &&
4309 net->src_addr_selected) {
4310 sctp_free_ifa(net->ro._s_addr);
4311 net->ro._s_addr = NULL;
4312 }
4313 net->src_addr_selected = 0;
4314 }
4315 }
4316 return (ret);
4317 }
4318 #endif
4319 #ifdef INET6
4320 case AF_INET6:
4321 {
4322 uint32_t flowlabel, flowinfo;
4323 struct ip6_hdr *ip6h;
4324 struct route_in6 ip6route;
4325 struct ifnet *ifp;
4326 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4327 int prev_scope = 0;
4328 struct sockaddr_in6 lsa6_storage;
4329 int error;
4330 u_short prev_port = 0;
4331 int len;
4332
4333 if (net) {
4334 flowlabel = net->flowlabel;
4335 } else if (stcb) {
4336 flowlabel = stcb->asoc.default_flowlabel;
4337 } else {
4338 flowlabel = inp->sctp_ep.default_flowlabel;
4339 }
4340 if (flowlabel == 0) {
4341 /*
4342 * This means especially, that it is not set
4343 * at the SCTP layer. So use the value from
4344 * the IP layer.
4345 */
4346 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4347 }
4348 flowlabel &= 0x000fffff;
4349 len = SCTP_MIN_OVERHEAD;
4350 if (port) {
4351 len += sizeof(struct udphdr);
4352 }
4353 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4354 if (newm == NULL) {
4355 sctp_m_freem(m);
4356 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4357 return (ENOMEM);
4358 }
4359 SCTP_ALIGN_TO_END(newm, len);
4360 SCTP_BUF_LEN(newm) = len;
4361 SCTP_BUF_NEXT(newm) = m;
4362 m = newm;
4363 if (net != NULL) {
4364 m->m_pkthdr.flowid = net->flowid;
4365 M_HASHTYPE_SET(m, net->flowtype);
4366 } else {
4367 m->m_pkthdr.flowid = mflowid;
4368 M_HASHTYPE_SET(m, mflowtype);
4369 }
4370 packet_length = sctp_calculate_len(m);
4371
4372 ip6h = mtod(m, struct ip6_hdr *);
4373 /* protect *sin6 from overwrite */
4374 sin6 = (struct sockaddr_in6 *)to;
4375 tmp = *sin6;
4376 sin6 = &tmp;
4377
4378 /* KAME hack: embed scopeid */
4379 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4380 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4381 return (EINVAL);
4382 }
4383 if (net == NULL) {
4384 memset(&ip6route, 0, sizeof(ip6route));
4385 ro = (sctp_route_t *) & ip6route;
4386 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4387 } else {
4388 ro = (sctp_route_t *) & net->ro;
4389 }
4390 /*
4391 * We assume here that inp_flow is in host byte
4392 * order within the TCB!
4393 */
4394 if (tos_value == 0) {
4395 /*
4396 * This means especially, that it is not set
4397 * at the SCTP layer. So use the value from
4398 * the IP layer.
4399 */
4400 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4401 }
4402 tos_value &= 0xfc;
4403 if (ecn_ok) {
4404 tos_value |= sctp_get_ect(stcb);
4405 }
4406 flowinfo = 0x06;
4407 flowinfo <<= 8;
4408 flowinfo |= tos_value;
4409 flowinfo <<= 20;
4410 flowinfo |= flowlabel;
4411 ip6h->ip6_flow = htonl(flowinfo);
4412 if (port) {
4413 ip6h->ip6_nxt = IPPROTO_UDP;
4414 } else {
4415 ip6h->ip6_nxt = IPPROTO_SCTP;
4416 }
4417 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4418 ip6h->ip6_dst = sin6->sin6_addr;
4419
4420 /*
4421 * Add SRC address selection here: we can only reuse
4422 * to a limited degree the kame src-addr-sel, since
4423 * we can try their selection but it may not be
4424 * bound.
4425 */
4426 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4427 lsa6_tmp.sin6_family = AF_INET6;
4428 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4429 lsa6 = &lsa6_tmp;
4430 if (net && out_of_asoc_ok == 0) {
4431 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4432 sctp_free_ifa(net->ro._s_addr);
4433 net->ro._s_addr = NULL;
4434 net->src_addr_selected = 0;
4435 if (ro->ro_rt) {
4436 RTFREE(ro->ro_rt);
4437 ro->ro_rt = NULL;
4438 }
4439 }
4440 if (net->src_addr_selected == 0) {
4441 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4442 /* KAME hack: embed scopeid */
4443 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4444 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4445 return (EINVAL);
4446 }
4447 /* Cache the source address */
4448 net->ro._s_addr = sctp_source_address_selection(inp,
4449 stcb,
4450 ro,
4451 net,
4452 0,
4453 vrf_id);
4454 (void)sa6_recoverscope(sin6);
4455 net->src_addr_selected = 1;
4456 }
4457 if (net->ro._s_addr == NULL) {
4458 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4459 net->src_addr_selected = 0;
4460 sctp_handle_no_route(stcb, net, so_locked);
4461 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4462 sctp_m_freem(m);
4463 return (EHOSTUNREACH);
4464 }
4465 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4466 } else {
4467 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4468 /* KAME hack: embed scopeid */
4469 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4470 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4471 return (EINVAL);
4472 }
4473 if (over_addr == NULL) {
4474 struct sctp_ifa *_lsrc;
4475
4476 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4477 net,
4478 out_of_asoc_ok,
4479 vrf_id);
4480 if (_lsrc == NULL) {
4481 sctp_handle_no_route(stcb, net, so_locked);
4482 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4483 sctp_m_freem(m);
4484 return (EHOSTUNREACH);
4485 }
4486 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4487 sctp_free_ifa(_lsrc);
4488 } else {
4489 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4490 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4491 }
4492 (void)sa6_recoverscope(sin6);
4493 }
4494 lsa6->sin6_port = inp->sctp_lport;
4495
4496 if (ro->ro_rt == NULL) {
4497 /*
4498 * src addr selection failed to find a route
4499 * (or valid source addr), so we can't get
4500 * there from here!
4501 */
4502 sctp_handle_no_route(stcb, net, so_locked);
4503 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4504 sctp_m_freem(m);
4505 return (EHOSTUNREACH);
4506 }
4507 /*
4508 * XXX: sa6 may not have a valid sin6_scope_id in
4509 * the non-SCOPEDROUTING case.
4510 */
4511 bzero(&lsa6_storage, sizeof(lsa6_storage));
4512 lsa6_storage.sin6_family = AF_INET6;
4513 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4514 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4515 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4516 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4517 sctp_m_freem(m);
4518 return (error);
4519 }
4520 /* XXX */
4521 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4522 lsa6_storage.sin6_port = inp->sctp_lport;
4523 lsa6 = &lsa6_storage;
4524 ip6h->ip6_src = lsa6->sin6_addr;
4525
4526 if (port) {
4527 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4528 sctp_handle_no_route(stcb, net, so_locked);
4529 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4530 sctp_m_freem(m);
4531 return (EHOSTUNREACH);
4532 }
4533 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4534 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4535 udp->uh_dport = port;
4536 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4537 udp->uh_sum = 0;
4538 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4539 } else {
4540 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4541 }
4542
4543 sctphdr->src_port = src_port;
4544 sctphdr->dest_port = dest_port;
4545 sctphdr->v_tag = v_tag;
4546 sctphdr->checksum = 0;
4547
4548 /*
4549 * We set the hop limit now since there is a good
4550 * chance that our ro pointer is now filled
4551 */
4552 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4553 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4554
4555 #ifdef SCTP_DEBUG
4556 /* Copy to be sure something bad is not happening */
4557 sin6->sin6_addr = ip6h->ip6_dst;
4558 lsa6->sin6_addr = ip6h->ip6_src;
4559 #endif
4560
4561 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4562 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4563 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4564 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4565 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4566 if (net) {
4567 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4568 /*
4569 * preserve the port and scope for link
4570 * local send
4571 */
4572 prev_scope = sin6->sin6_scope_id;
4573 prev_port = sin6->sin6_port;
4574 }
4575 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4576 /* failed to prepend data, give up */
4577 sctp_m_freem(m);
4578 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4579 return (ENOMEM);
4580 }
4581 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4582 if (port) {
4583 #if defined(SCTP_WITH_NO_CSUM)
4584 SCTP_STAT_INCR(sctps_sendnocrc);
4585 #else
4586 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4587 SCTP_STAT_INCR(sctps_sendswcrc);
4588 #endif
4589 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4590 udp->uh_sum = 0xffff;
4591 }
4592 } else {
4593 #if defined(SCTP_WITH_NO_CSUM)
4594 SCTP_STAT_INCR(sctps_sendnocrc);
4595 #else
4596 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4597 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4598 SCTP_STAT_INCR(sctps_sendhwcrc);
4599 #endif
4600 }
4601 /* send it out. table id is taken from stcb */
4602 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4603 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4604 so = SCTP_INP_SO(inp);
4605 SCTP_SOCKET_UNLOCK(so, 0);
4606 }
4607 #endif
4608 #ifdef SCTP_PACKET_LOGGING
4609 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4610 sctp_packet_log(o_pak);
4611 #endif
4612 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4613 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4614 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4615 atomic_add_int(&stcb->asoc.refcnt, 1);
4616 SCTP_TCB_UNLOCK(stcb);
4617 SCTP_SOCKET_LOCK(so, 0);
4618 SCTP_TCB_LOCK(stcb);
4619 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4620 }
4621 #endif
4622 if (net) {
4623 /* for link local this must be done */
4624 sin6->sin6_scope_id = prev_scope;
4625 sin6->sin6_port = prev_port;
4626 }
4627 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4628 SCTP_STAT_INCR(sctps_sendpackets);
4629 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4630 if (ret) {
4631 SCTP_STAT_INCR(sctps_senderrors);
4632 }
4633 if (net == NULL) {
4634 /* Now if we had a temp route free it */
4635 RO_RTFREE(ro);
4636 } else {
4637 /*
4638 * PMTU check versus smallest asoc MTU goes
4639 * here
4640 */
4641 if (ro->ro_rt == NULL) {
4642 /* Route was freed */
4643 if (net->ro._s_addr &&
4644 net->src_addr_selected) {
4645 sctp_free_ifa(net->ro._s_addr);
4646 net->ro._s_addr = NULL;
4647 }
4648 net->src_addr_selected = 0;
4649 }
4650 if ((ro->ro_rt != NULL) &&
4651 (net->ro._s_addr)) {
4652 uint32_t mtu;
4653
4654 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4655 if (mtu &&
4656 (stcb->asoc.smallest_mtu > mtu)) {
4657 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4658 net->mtu = mtu;
4659 if (net->port) {
4660 net->mtu -= sizeof(struct udphdr);
4661 }
4662 }
4663 } else if (ifp) {
4664 if (ND_IFINFO(ifp)->linkmtu &&
4665 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4666 sctp_mtu_size_reset(inp,
4667 &stcb->asoc,
4668 ND_IFINFO(ifp)->linkmtu);
4669 }
4670 }
4671 }
4672 return (ret);
4673 }
4674 #endif
4675 default:
4676 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4677 ((struct sockaddr *)to)->sa_family);
4678 sctp_m_freem(m);
4679 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4680 return (EFAULT);
4681 }
4682 }
4683
4684
4685 void
4686 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4687 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4688 SCTP_UNUSED
4689 #endif
4690 )
4691 {
4692 struct mbuf *m, *m_last;
4693 struct sctp_nets *net;
4694 struct sctp_init_chunk *init;
4695 struct sctp_supported_addr_param *sup_addr;
4696 struct sctp_adaptation_layer_indication *ali;
4697 struct sctp_supported_chunk_types_param *pr_supported;
4698 struct sctp_paramhdr *ph;
4699 int cnt_inits_to = 0;
4700 int ret;
4701 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4702
4703 /* INIT's always go to the primary (and usually ONLY address) */
4704 net = stcb->asoc.primary_destination;
4705 if (net == NULL) {
4706 net = TAILQ_FIRST(&stcb->asoc.nets);
4707 if (net == NULL) {
4708 /* TSNH */
4709 return;
4710 }
4711 /* we confirm any address we send an INIT to */
4712 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4713 (void)sctp_set_primary_addr(stcb, NULL, net);
4714 } else {
4715 /* we confirm any address we send an INIT to */
4716 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4717 }
4718 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4719 #ifdef INET6
4720 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4721 /*
4722 * special hook, if we are sending to link local it will not
4723 * show up in our private address count.
4724 */
4725 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4726 cnt_inits_to = 1;
4727 }
4728 #endif
4729 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4730 /* This case should not happen */
4731 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4732 return;
4733 }
4734 /* start the INIT timer */
4735 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4736
4737 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4738 if (m == NULL) {
4739 /* No memory, INIT timer will re-attempt. */
4740 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4741 return;
4742 }
4743 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4744 padding_len = 0;
4745 /* Now lets put the chunk header in place */
4746 init = mtod(m, struct sctp_init_chunk *);
4747 /* now the chunk header */
4748 init->ch.chunk_type = SCTP_INITIATION;
4749 init->ch.chunk_flags = 0;
4750 /* fill in later from mbuf we build */
4751 init->ch.chunk_length = 0;
4752 /* place in my tag */
4753 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4754 /* set up some of the credits. */
4755 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4756 SCTP_MINIMAL_RWND));
4757 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4758 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4759 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4760
4761 /* Adaptation layer indication parameter */
4762 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4763 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4764 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4765 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4766 ali->ph.param_length = htons(parameter_len);
4767 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4768 chunk_len += parameter_len;
4769 }
4770 /* ECN parameter */
4771 if (stcb->asoc.ecn_supported == 1) {
4772 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4773 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4774 ph->param_type = htons(SCTP_ECN_CAPABLE);
4775 ph->param_length = htons(parameter_len);
4776 chunk_len += parameter_len;
4777 }
4778 /* PR-SCTP supported parameter */
4779 if (stcb->asoc.prsctp_supported == 1) {
4780 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4781 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4782 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4783 ph->param_length = htons(parameter_len);
4784 chunk_len += parameter_len;
4785 }
4786 /* Add NAT friendly parameter. */
4787 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4788 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4789 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4790 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4791 ph->param_length = htons(parameter_len);
4792 chunk_len += parameter_len;
4793 }
4794 /* And now tell the peer which extensions we support */
4795 num_ext = 0;
4796 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4797 if (stcb->asoc.prsctp_supported == 1) {
4798 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4799 }
4800 if (stcb->asoc.auth_supported == 1) {
4801 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4802 }
4803 if (stcb->asoc.asconf_supported == 1) {
4804 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4805 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4806 }
4807 if (stcb->asoc.reconfig_supported == 1) {
4808 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4809 }
4810 if (stcb->asoc.nrsack_supported == 1) {
4811 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4812 }
4813 if (stcb->asoc.pktdrop_supported == 1) {
4814 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4815 }
4816 if (num_ext > 0) {
4817 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4818 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4819 pr_supported->ph.param_length = htons(parameter_len);
4820 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4821 chunk_len += parameter_len;
4822 }
4823 /* add authentication parameters */
4824 if (stcb->asoc.auth_supported) {
4825 /* attach RANDOM parameter, if available */
4826 if (stcb->asoc.authinfo.random != NULL) {
4827 struct sctp_auth_random *randp;
4828
4829 if (padding_len > 0) {
4830 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4831 chunk_len += padding_len;
4832 padding_len = 0;
4833 }
4834 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4835 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4836 /* random key already contains the header */
4837 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4838 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4839 chunk_len += parameter_len;
4840 }
4841 /* add HMAC_ALGO parameter */
4842 if (stcb->asoc.local_hmacs != NULL) {
4843 struct sctp_auth_hmac_algo *hmacs;
4844
4845 if (padding_len > 0) {
4846 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4847 chunk_len += padding_len;
4848 padding_len = 0;
4849 }
4850 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4851 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4852 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4853 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4854 hmacs->ph.param_length = htons(parameter_len);
4855 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4856 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4857 chunk_len += parameter_len;
4858 }
4859 /* add CHUNKS parameter */
4860 if (stcb->asoc.local_auth_chunks != NULL) {
4861 struct sctp_auth_chunk_list *chunks;
4862
4863 if (padding_len > 0) {
4864 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4865 chunk_len += padding_len;
4866 padding_len = 0;
4867 }
4868 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4869 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4870 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4871 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4872 chunks->ph.param_length = htons(parameter_len);
4873 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4874 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4875 chunk_len += parameter_len;
4876 }
4877 }
4878 /* now any cookie time extensions */
4879 if (stcb->asoc.cookie_preserve_req) {
4880 struct sctp_cookie_perserve_param *cookie_preserve;
4881
4882 if (padding_len > 0) {
4883 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4884 chunk_len += padding_len;
4885 padding_len = 0;
4886 }
4887 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4888 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4889 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4890 cookie_preserve->ph.param_length = htons(parameter_len);
4891 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4892 stcb->asoc.cookie_preserve_req = 0;
4893 chunk_len += parameter_len;
4894 }
4895 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4896 uint8_t i;
4897
4898 if (padding_len > 0) {
4899 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4900 chunk_len += padding_len;
4901 padding_len = 0;
4902 }
4903 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4904 if (stcb->asoc.scope.ipv4_addr_legal) {
4905 parameter_len += (uint16_t) sizeof(uint16_t);
4906 }
4907 if (stcb->asoc.scope.ipv6_addr_legal) {
4908 parameter_len += (uint16_t) sizeof(uint16_t);
4909 }
4910 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4911 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4912 sup_addr->ph.param_length = htons(parameter_len);
4913 i = 0;
4914 if (stcb->asoc.scope.ipv4_addr_legal) {
4915 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4916 }
4917 if (stcb->asoc.scope.ipv6_addr_legal) {
4918 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4919 }
4920 padding_len = 4 - 2 * i;
4921 chunk_len += parameter_len;
4922 }
4923 SCTP_BUF_LEN(m) = chunk_len;
4924 /* now the addresses */
4925 /*
4926 * To optimize this we could put the scoping stuff into a structure
4927 * and remove the individual uint8's from the assoc structure. Then
4928 * we could just sifa in the address within the stcb. But for now
4929 * this is a quick hack to get the address stuff teased apart.
4930 */
4931 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4932 m, cnt_inits_to,
4933 &padding_len, &chunk_len);
4934
4935 init->ch.chunk_length = htons(chunk_len);
4936 if (padding_len > 0) {
4937 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4938 sctp_m_freem(m);
4939 return;
4940 }
4941 }
4942 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4943 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4944 (struct sockaddr *)&net->ro._l_addr,
4945 m, 0, NULL, 0, 0, 0, 0,
4946 inp->sctp_lport, stcb->rport, htonl(0),
4947 net->port, NULL,
4948 0, 0,
4949 so_locked);
4950 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4951 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4952 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4953 }
4954
4955 struct mbuf *
4956 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4957 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4958 {
4959 /*
4960 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4961 * being equal to the beginning of the params i.e. (iphlen +
4962 * sizeof(struct sctp_init_msg) parse through the parameters to the
4963 * end of the mbuf verifying that all parameters are known.
4964 *
4965 * For unknown parameters build and return a mbuf with
4966 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4967 * processing this chunk stop, and set *abort_processing to 1.
4968 *
4969 * By having param_offset be pre-set to where parameters begin it is
4970 * hoped that this routine may be reused in the future by new
4971 * features.
4972 */
4973 struct sctp_paramhdr *phdr, params;
4974
4975 struct mbuf *mat, *op_err;
4976 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4977 int at, limit, pad_needed;
4978 uint16_t ptype, plen, padded_size;
4979 int err_at;
4980
4981 *abort_processing = 0;
4982 mat = in_initpkt;
4983 err_at = 0;
4984 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4985 at = param_offset;
4986 op_err = NULL;
4987 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4988 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4989 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4990 ptype = ntohs(phdr->param_type);
4991 plen = ntohs(phdr->param_length);
4992 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4993 /* wacked parameter */
4994 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4995 goto invalid_size;
4996 }
4997 limit -= SCTP_SIZE32(plen);
4998 /*-
4999 * All parameters for all chunks that we know/understand are
5000 * listed here. We process them other places and make
5001 * appropriate stop actions per the upper bits. However this
5002 * is the generic routine processor's can call to get back
5003 * an operr.. to either incorporate (init-ack) or send.
5004 */
5005 padded_size = SCTP_SIZE32(plen);
5006 switch (ptype) {
5007 /* Param's with variable size */
5008 case SCTP_HEARTBEAT_INFO:
5009 case SCTP_STATE_COOKIE:
5010 case SCTP_UNRECOG_PARAM:
5011 case SCTP_ERROR_CAUSE_IND:
5012 /* ok skip fwd */
5013 at += padded_size;
5014 break;
5015 /* Param's with variable size within a range */
5016 case SCTP_CHUNK_LIST:
5017 case SCTP_SUPPORTED_CHUNK_EXT:
5018 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5019 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5020 goto invalid_size;
5021 }
5022 at += padded_size;
5023 break;
5024 case SCTP_SUPPORTED_ADDRTYPE:
5025 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5026 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5027 goto invalid_size;
5028 }
5029 at += padded_size;
5030 break;
5031 case SCTP_RANDOM:
5032 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5033 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5034 goto invalid_size;
5035 }
5036 at += padded_size;
5037 break;
5038 case SCTP_SET_PRIM_ADDR:
5039 case SCTP_DEL_IP_ADDRESS:
5040 case SCTP_ADD_IP_ADDRESS:
5041 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5042 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5043 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5044 goto invalid_size;
5045 }
5046 at += padded_size;
5047 break;
5048 /* Param's with a fixed size */
5049 case SCTP_IPV4_ADDRESS:
5050 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5051 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5052 goto invalid_size;
5053 }
5054 at += padded_size;
5055 break;
5056 case SCTP_IPV6_ADDRESS:
5057 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5058 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5059 goto invalid_size;
5060 }
5061 at += padded_size;
5062 break;
5063 case SCTP_COOKIE_PRESERVE:
5064 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5065 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5066 goto invalid_size;
5067 }
5068 at += padded_size;
5069 break;
5070 case SCTP_HAS_NAT_SUPPORT:
5071 *nat_friendly = 1;
5072 /* fall through */
5073 case SCTP_PRSCTP_SUPPORTED:
5074 if (padded_size != sizeof(struct sctp_paramhdr)) {
5075 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5076 goto invalid_size;
5077 }
5078 at += padded_size;
5079 break;
5080 case SCTP_ECN_CAPABLE:
5081 if (padded_size != sizeof(struct sctp_paramhdr)) {
5082 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5083 goto invalid_size;
5084 }
5085 at += padded_size;
5086 break;
5087 case SCTP_ULP_ADAPTATION:
5088 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5089 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5090 goto invalid_size;
5091 }
5092 at += padded_size;
5093 break;
5094 case SCTP_SUCCESS_REPORT:
5095 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5096 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5097 goto invalid_size;
5098 }
5099 at += padded_size;
5100 break;
5101 case SCTP_HOSTNAME_ADDRESS:
5102 {
5103 /* We can NOT handle HOST NAME addresses!! */
5104 int l_len;
5105
5106 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5107 *abort_processing = 1;
5108 if (op_err == NULL) {
5109 /* Ok need to try to get a mbuf */
5110 #ifdef INET6
5111 l_len = SCTP_MIN_OVERHEAD;
5112 #else
5113 l_len = SCTP_MIN_V4_OVERHEAD;
5114 #endif
5115 l_len += sizeof(struct sctp_chunkhdr);
5116 l_len += plen;
5117 l_len += sizeof(struct sctp_paramhdr);
5118 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5119 if (op_err) {
5120 SCTP_BUF_LEN(op_err) = 0;
5121 /*
5122 * pre-reserve space for ip
5123 * and sctp header and
5124 * chunk hdr
5125 */
5126 #ifdef INET6
5127 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5128 #else
5129 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5130 #endif
5131 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5132 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5133 }
5134 }
5135 if (op_err) {
5136 /* If we have space */
5137 struct sctp_paramhdr s;
5138
5139 if (err_at % 4) {
5140 uint32_t cpthis = 0;
5141
5142 pad_needed = 4 - (err_at % 4);
5143 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5144 err_at += pad_needed;
5145 }
5146 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5147 s.param_length = htons(sizeof(s) + plen);
5148 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5149 err_at += sizeof(s);
5150 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5151 if (phdr == NULL) {
5152 sctp_m_freem(op_err);
5153 /*
5154 * we are out of memory but
5155 * we still need to have a
5156 * look at what to do (the
5157 * system is in trouble
5158 * though).
5159 */
5160 return (NULL);
5161 }
5162 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5163 }
5164 return (op_err);
5165 break;
5166 }
5167 default:
5168 /*
5169 * we do not recognize the parameter figure out what
5170 * we do.
5171 */
5172 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5173 if ((ptype & 0x4000) == 0x4000) {
5174 /* Report bit is set?? */
5175 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5176 if (op_err == NULL) {
5177 int l_len;
5178
5179 /* Ok need to try to get an mbuf */
5180 #ifdef INET6
5181 l_len = SCTP_MIN_OVERHEAD;
5182 #else
5183 l_len = SCTP_MIN_V4_OVERHEAD;
5184 #endif
5185 l_len += sizeof(struct sctp_chunkhdr);
5186 l_len += plen;
5187 l_len += sizeof(struct sctp_paramhdr);
5188 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5189 if (op_err) {
5190 SCTP_BUF_LEN(op_err) = 0;
5191 #ifdef INET6
5192 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5193 #else
5194 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5195 #endif
5196 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5197 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5198 }
5199 }
5200 if (op_err) {
5201 /* If we have space */
5202 struct sctp_paramhdr s;
5203
5204 if (err_at % 4) {
5205 uint32_t cpthis = 0;
5206
5207 pad_needed = 4 - (err_at % 4);
5208 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5209 err_at += pad_needed;
5210 }
5211 s.param_type = htons(SCTP_UNRECOG_PARAM);
5212 s.param_length = htons(sizeof(s) + plen);
5213 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5214 err_at += sizeof(s);
5215 if (plen > sizeof(tempbuf)) {
5216 plen = sizeof(tempbuf);
5217 }
5218 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5219 if (phdr == NULL) {
5220 sctp_m_freem(op_err);
5221 /*
5222 * we are out of memory but
5223 * we still need to have a
5224 * look at what to do (the
5225 * system is in trouble
5226 * though).
5227 */
5228 op_err = NULL;
5229 goto more_processing;
5230 }
5231 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5232 err_at += plen;
5233 }
5234 }
5235 more_processing:
5236 if ((ptype & 0x8000) == 0x0000) {
5237 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5238 return (op_err);
5239 } else {
5240 /* skip this chunk and continue processing */
5241 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5242 at += SCTP_SIZE32(plen);
5243 }
5244 break;
5245
5246 }
5247 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5248 }
5249 return (op_err);
5250 invalid_size:
5251 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5252 *abort_processing = 1;
5253 if ((op_err == NULL) && phdr) {
5254 int l_len;
5255
5256 #ifdef INET6
5257 l_len = SCTP_MIN_OVERHEAD;
5258 #else
5259 l_len = SCTP_MIN_V4_OVERHEAD;
5260 #endif
5261 l_len += sizeof(struct sctp_chunkhdr);
5262 l_len += (2 * sizeof(struct sctp_paramhdr));
5263 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5264 if (op_err) {
5265 SCTP_BUF_LEN(op_err) = 0;
5266 #ifdef INET6
5267 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5268 #else
5269 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5270 #endif
5271 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5272 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5273 }
5274 }
5275 if ((op_err) && phdr) {
5276 struct sctp_paramhdr s;
5277
5278 if (err_at % 4) {
5279 uint32_t cpthis = 0;
5280
5281 pad_needed = 4 - (err_at % 4);
5282 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5283 err_at += pad_needed;
5284 }
5285 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5286 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5287 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5288 err_at += sizeof(s);
5289 /* Only copy back the p-hdr that caused the issue */
5290 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5291 }
5292 return (op_err);
5293 }
5294
5295 static int
5296 sctp_are_there_new_addresses(struct sctp_association *asoc,
5297 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5298 {
5299 /*
5300 * Given a INIT packet, look through the packet to verify that there
5301 * are NO new addresses. As we go through the parameters add reports
5302 * of any un-understood parameters that require an error. Also we
5303 * must return (1) to drop the packet if we see a un-understood
5304 * parameter that tells us to drop the chunk.
5305 */
5306 struct sockaddr *sa_touse;
5307 struct sockaddr *sa;
5308 struct sctp_paramhdr *phdr, params;
5309 uint16_t ptype, plen;
5310 uint8_t fnd;
5311 struct sctp_nets *net;
5312 int check_src;
5313
5314 #ifdef INET
5315 struct sockaddr_in sin4, *sa4;
5316
5317 #endif
5318 #ifdef INET6
5319 struct sockaddr_in6 sin6, *sa6;
5320
5321 #endif
5322
5323 #ifdef INET
5324 memset(&sin4, 0, sizeof(sin4));
5325 sin4.sin_family = AF_INET;
5326 sin4.sin_len = sizeof(sin4);
5327 #endif
5328 #ifdef INET6
5329 memset(&sin6, 0, sizeof(sin6));
5330 sin6.sin6_family = AF_INET6;
5331 sin6.sin6_len = sizeof(sin6);
5332 #endif
5333 /* First what about the src address of the pkt ? */
5334 check_src = 0;
5335 switch (src->sa_family) {
5336 #ifdef INET
5337 case AF_INET:
5338 if (asoc->scope.ipv4_addr_legal) {
5339 check_src = 1;
5340 }
5341 break;
5342 #endif
5343 #ifdef INET6
5344 case AF_INET6:
5345 if (asoc->scope.ipv6_addr_legal) {
5346 check_src = 1;
5347 }
5348 break;
5349 #endif
5350 default:
5351 /* TSNH */
5352 break;
5353 }
5354 if (check_src) {
5355 fnd = 0;
5356 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5357 sa = (struct sockaddr *)&net->ro._l_addr;
5358 if (sa->sa_family == src->sa_family) {
5359 #ifdef INET
5360 if (sa->sa_family == AF_INET) {
5361 struct sockaddr_in *src4;
5362
5363 sa4 = (struct sockaddr_in *)sa;
5364 src4 = (struct sockaddr_in *)src;
5365 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5366 fnd = 1;
5367 break;
5368 }
5369 }
5370 #endif
5371 #ifdef INET6
5372 if (sa->sa_family == AF_INET6) {
5373 struct sockaddr_in6 *src6;
5374
5375 sa6 = (struct sockaddr_in6 *)sa;
5376 src6 = (struct sockaddr_in6 *)src;
5377 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5378 fnd = 1;
5379 break;
5380 }
5381 }
5382 #endif
5383 }
5384 }
5385 if (fnd == 0) {
5386 /* New address added! no need to look futher. */
5387 return (1);
5388 }
5389 }
5390 /* Ok so far lets munge through the rest of the packet */
5391 offset += sizeof(struct sctp_init_chunk);
5392 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5393 while (phdr) {
5394 sa_touse = NULL;
5395 ptype = ntohs(phdr->param_type);
5396 plen = ntohs(phdr->param_length);
5397 switch (ptype) {
5398 #ifdef INET
5399 case SCTP_IPV4_ADDRESS:
5400 {
5401 struct sctp_ipv4addr_param *p4, p4_buf;
5402
5403 phdr = sctp_get_next_param(in_initpkt, offset,
5404 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5405 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5406 phdr == NULL) {
5407 return (1);
5408 }
5409 if (asoc->scope.ipv4_addr_legal) {
5410 p4 = (struct sctp_ipv4addr_param *)phdr;
5411 sin4.sin_addr.s_addr = p4->addr;
5412 sa_touse = (struct sockaddr *)&sin4;
5413 }
5414 break;
5415 }
5416 #endif
5417 #ifdef INET6
5418 case SCTP_IPV6_ADDRESS:
5419 {
5420 struct sctp_ipv6addr_param *p6, p6_buf;
5421
5422 phdr = sctp_get_next_param(in_initpkt, offset,
5423 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5424 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5425 phdr == NULL) {
5426 return (1);
5427 }
5428 if (asoc->scope.ipv6_addr_legal) {
5429 p6 = (struct sctp_ipv6addr_param *)phdr;
5430 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5431 sizeof(p6->addr));
5432 sa_touse = (struct sockaddr *)&sin6;
5433 }
5434 break;
5435 }
5436 #endif
5437 default:
5438 sa_touse = NULL;
5439 break;
5440 }
5441 if (sa_touse) {
5442 /* ok, sa_touse points to one to check */
5443 fnd = 0;
5444 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5445 sa = (struct sockaddr *)&net->ro._l_addr;
5446 if (sa->sa_family != sa_touse->sa_family) {
5447 continue;
5448 }
5449 #ifdef INET
5450 if (sa->sa_family == AF_INET) {
5451 sa4 = (struct sockaddr_in *)sa;
5452 if (sa4->sin_addr.s_addr ==
5453 sin4.sin_addr.s_addr) {
5454 fnd = 1;
5455 break;
5456 }
5457 }
5458 #endif
5459 #ifdef INET6
5460 if (sa->sa_family == AF_INET6) {
5461 sa6 = (struct sockaddr_in6 *)sa;
5462 if (SCTP6_ARE_ADDR_EQUAL(
5463 sa6, &sin6)) {
5464 fnd = 1;
5465 break;
5466 }
5467 }
5468 #endif
5469 }
5470 if (!fnd) {
5471 /* New addr added! no need to look further */
5472 return (1);
5473 }
5474 }
5475 offset += SCTP_SIZE32(plen);
5476 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5477 }
5478 return (0);
5479 }
5480
5481 /*
5482 * Given a MBUF chain that was sent into us containing an INIT. Build a
5483 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5484 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5485 * message (i.e. the struct sctp_init_msg).
5486 */
5487 void
5488 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5489 struct sctp_nets *src_net, struct mbuf *init_pkt,
5490 int iphlen, int offset,
5491 struct sockaddr *src, struct sockaddr *dst,
5492 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5493 uint8_t mflowtype, uint32_t mflowid,
5494 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5495 {
5496 struct sctp_association *asoc;
5497 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5498 struct sctp_init_ack_chunk *initack;
5499 struct sctp_adaptation_layer_indication *ali;
5500 struct sctp_supported_chunk_types_param *pr_supported;
5501 struct sctp_paramhdr *ph;
5502 union sctp_sockstore *over_addr;
5503 struct sctp_scoping scp;
5504
5505 #ifdef INET
5506 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5507 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5508 struct sockaddr_in *sin;
5509
5510 #endif
5511 #ifdef INET6
5512 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5513 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5514 struct sockaddr_in6 *sin6;
5515
5516 #endif
5517 struct sockaddr *to;
5518 struct sctp_state_cookie stc;
5519 struct sctp_nets *net = NULL;
5520 uint8_t *signature = NULL;
5521 int cnt_inits_to = 0;
5522 uint16_t his_limit, i_want;
5523 int abort_flag;
5524 int nat_friendly = 0;
5525 struct socket *so;
5526 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5527
5528 if (stcb) {
5529 asoc = &stcb->asoc;
5530 } else {
5531 asoc = NULL;
5532 }
5533 if ((asoc != NULL) &&
5534 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT)) {
5535 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5536 /*
5537 * new addresses, out of here in non-cookie-wait
5538 * states
5539 *
5540 * Send an ABORT, without the new address error cause.
5541 * This looks no different than if no listener was
5542 * present.
5543 */
5544 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5545 "Address added");
5546 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5547 mflowtype, mflowid, inp->fibnum,
5548 vrf_id, port);
5549 return;
5550 }
5551 if (src_net != NULL && (src_net->port != port)) {
5552 /*
5553 * change of remote encapsulation port, out of here
5554 * in non-cookie-wait states
5555 *
5556 * Send an ABORT, without an specific error cause. This
5557 * looks no different than if no listener was
5558 * present.
5559 */
5560 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5561 "Remote encapsulation port changed");
5562 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5563 mflowtype, mflowid, inp->fibnum,
5564 vrf_id, port);
5565 return;
5566 }
5567 }
5568 abort_flag = 0;
5569 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5570 (offset + sizeof(struct sctp_init_chunk)),
5571 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5572 if (abort_flag) {
5573 do_a_abort:
5574 if (op_err == NULL) {
5575 char msg[SCTP_DIAG_INFO_LEN];
5576
5577 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5578 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5579 msg);
5580 }
5581 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5582 init_chk->init.initiate_tag, op_err,
5583 mflowtype, mflowid, inp->fibnum,
5584 vrf_id, port);
5585 return;
5586 }
5587 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5588 if (m == NULL) {
5589 /* No memory, INIT timer will re-attempt. */
5590 if (op_err)
5591 sctp_m_freem(op_err);
5592 return;
5593 }
5594 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
5595 padding_len = 0;
5596
5597 /*
5598 * We might not overwrite the identification[] completely and on
5599 * some platforms time_entered will contain some padding. Therefore
5600 * zero out the cookie to avoid putting uninitialized memory on the
5601 * wire.
5602 */
5603 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5604
5605 /* the time I built cookie */
5606 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5607
5608 /* populate any tie tags */
5609 if (asoc != NULL) {
5610 /* unlock before tag selections */
5611 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5612 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5613 stc.cookie_life = asoc->cookie_life;
5614 net = asoc->primary_destination;
5615 } else {
5616 stc.tie_tag_my_vtag = 0;
5617 stc.tie_tag_peer_vtag = 0;
5618 /* life I will award this cookie */
5619 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5620 }
5621
5622 /* copy in the ports for later check */
5623 stc.myport = sh->dest_port;
5624 stc.peerport = sh->src_port;
5625
5626 /*
5627 * If we wanted to honor cookie life extentions, we would add to
5628 * stc.cookie_life. For now we should NOT honor any extension
5629 */
5630 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5631 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5632 stc.ipv6_addr_legal = 1;
5633 if (SCTP_IPV6_V6ONLY(inp)) {
5634 stc.ipv4_addr_legal = 0;
5635 } else {
5636 stc.ipv4_addr_legal = 1;
5637 }
5638 } else {
5639 stc.ipv6_addr_legal = 0;
5640 stc.ipv4_addr_legal = 1;
5641 }
5642 stc.ipv4_scope = 0;
5643 if (net == NULL) {
5644 to = src;
5645 switch (dst->sa_family) {
5646 #ifdef INET
5647 case AF_INET:
5648 {
5649 /* lookup address */
5650 stc.address[0] = src4->sin_addr.s_addr;
5651 stc.address[1] = 0;
5652 stc.address[2] = 0;
5653 stc.address[3] = 0;
5654 stc.addr_type = SCTP_IPV4_ADDRESS;
5655 /* local from address */
5656 stc.laddress[0] = dst4->sin_addr.s_addr;
5657 stc.laddress[1] = 0;
5658 stc.laddress[2] = 0;
5659 stc.laddress[3] = 0;
5660 stc.laddr_type = SCTP_IPV4_ADDRESS;
5661 /* scope_id is only for v6 */
5662 stc.scope_id = 0;
5663 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5664 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5665 stc.ipv4_scope = 1;
5666 }
5667 /* Must use the address in this case */
5668 if (sctp_is_address_on_local_host(src, vrf_id)) {
5669 stc.loopback_scope = 1;
5670 stc.ipv4_scope = 1;
5671 stc.site_scope = 1;
5672 stc.local_scope = 0;
5673 }
5674 break;
5675 }
5676 #endif
5677 #ifdef INET6
5678 case AF_INET6:
5679 {
5680 stc.addr_type = SCTP_IPV6_ADDRESS;
5681 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5682 stc.scope_id = in6_getscope(&src6->sin6_addr);
5683 if (sctp_is_address_on_local_host(src, vrf_id)) {
5684 stc.loopback_scope = 1;
5685 stc.local_scope = 0;
5686 stc.site_scope = 1;
5687 stc.ipv4_scope = 1;
5688 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5689 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5690 /*
5691 * If the new destination or source
5692 * is a LINK_LOCAL we must have
5693 * common both site and local scope.
5694 * Don't set local scope though
5695 * since we must depend on the
5696 * source to be added implicitly. We
5697 * cannot assure just because we
5698 * share one link that all links are
5699 * common.
5700 */
5701 stc.local_scope = 0;
5702 stc.site_scope = 1;
5703 stc.ipv4_scope = 1;
5704 /*
5705 * we start counting for the private
5706 * address stuff at 1. since the
5707 * link local we source from won't
5708 * show up in our scoped count.
5709 */
5710 cnt_inits_to = 1;
5711 /*
5712 * pull out the scope_id from
5713 * incoming pkt
5714 */
5715 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5716 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5717 /*
5718 * If the new destination or source
5719 * is SITE_LOCAL then we must have
5720 * site scope in common.
5721 */
5722 stc.site_scope = 1;
5723 }
5724 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5725 stc.laddr_type = SCTP_IPV6_ADDRESS;
5726 break;
5727 }
5728 #endif
5729 default:
5730 /* TSNH */
5731 goto do_a_abort;
5732 break;
5733 }
5734 } else {
5735 /* set the scope per the existing tcb */
5736
5737 #ifdef INET6
5738 struct sctp_nets *lnet;
5739
5740 #endif
5741
5742 stc.loopback_scope = asoc->scope.loopback_scope;
5743 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5744 stc.site_scope = asoc->scope.site_scope;
5745 stc.local_scope = asoc->scope.local_scope;
5746 #ifdef INET6
5747 /* Why do we not consider IPv4 LL addresses? */
5748 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5749 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5750 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5751 /*
5752 * if we have a LL address, start
5753 * counting at 1.
5754 */
5755 cnt_inits_to = 1;
5756 }
5757 }
5758 }
5759 #endif
5760 /* use the net pointer */
5761 to = (struct sockaddr *)&net->ro._l_addr;
5762 switch (to->sa_family) {
5763 #ifdef INET
5764 case AF_INET:
5765 sin = (struct sockaddr_in *)to;
5766 stc.address[0] = sin->sin_addr.s_addr;
5767 stc.address[1] = 0;
5768 stc.address[2] = 0;
5769 stc.address[3] = 0;
5770 stc.addr_type = SCTP_IPV4_ADDRESS;
5771 if (net->src_addr_selected == 0) {
5772 /*
5773 * strange case here, the INIT should have
5774 * did the selection.
5775 */
5776 net->ro._s_addr = sctp_source_address_selection(inp,
5777 stcb, (sctp_route_t *) & net->ro,
5778 net, 0, vrf_id);
5779 if (net->ro._s_addr == NULL)
5780 return;
5781
5782 net->src_addr_selected = 1;
5783
5784 }
5785 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5786 stc.laddress[1] = 0;
5787 stc.laddress[2] = 0;
5788 stc.laddress[3] = 0;
5789 stc.laddr_type = SCTP_IPV4_ADDRESS;
5790 /* scope_id is only for v6 */
5791 stc.scope_id = 0;
5792 break;
5793 #endif
5794 #ifdef INET6
5795 case AF_INET6:
5796 sin6 = (struct sockaddr_in6 *)to;
5797 memcpy(&stc.address, &sin6->sin6_addr,
5798 sizeof(struct in6_addr));
5799 stc.addr_type = SCTP_IPV6_ADDRESS;
5800 stc.scope_id = sin6->sin6_scope_id;
5801 if (net->src_addr_selected == 0) {
5802 /*
5803 * strange case here, the INIT should have
5804 * done the selection.
5805 */
5806 net->ro._s_addr = sctp_source_address_selection(inp,
5807 stcb, (sctp_route_t *) & net->ro,
5808 net, 0, vrf_id);
5809 if (net->ro._s_addr == NULL)
5810 return;
5811
5812 net->src_addr_selected = 1;
5813 }
5814 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5815 sizeof(struct in6_addr));
5816 stc.laddr_type = SCTP_IPV6_ADDRESS;
5817 break;
5818 #endif
5819 }
5820 }
5821 /* Now lets put the SCTP header in place */
5822 initack = mtod(m, struct sctp_init_ack_chunk *);
5823 /* Save it off for quick ref */
5824 stc.peers_vtag = init_chk->init.initiate_tag;
5825 /* who are we */
5826 memcpy(stc.identification, SCTP_VERSION_STRING,
5827 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5828 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5829 /* now the chunk header */
5830 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5831 initack->ch.chunk_flags = 0;
5832 /* fill in later from mbuf we build */
5833 initack->ch.chunk_length = 0;
5834 /* place in my tag */
5835 if ((asoc != NULL) &&
5836 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5837 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5838 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5839 /* re-use the v-tags and init-seq here */
5840 initack->init.initiate_tag = htonl(asoc->my_vtag);
5841 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5842 } else {
5843 uint32_t vtag, itsn;
5844
5845 if (hold_inp_lock) {
5846 SCTP_INP_INCR_REF(inp);
5847 SCTP_INP_RUNLOCK(inp);
5848 }
5849 if (asoc) {
5850 atomic_add_int(&asoc->refcnt, 1);
5851 SCTP_TCB_UNLOCK(stcb);
5852 new_tag:
5853 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5854 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5855 /*
5856 * Got a duplicate vtag on some guy behind a
5857 * nat make sure we don't use it.
5858 */
5859 goto new_tag;
5860 }
5861 initack->init.initiate_tag = htonl(vtag);
5862 /* get a TSN to use too */
5863 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5864 initack->init.initial_tsn = htonl(itsn);
5865 SCTP_TCB_LOCK(stcb);
5866 atomic_add_int(&asoc->refcnt, -1);
5867 } else {
5868 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5869 initack->init.initiate_tag = htonl(vtag);
5870 /* get a TSN to use too */
5871 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5872 }
5873 if (hold_inp_lock) {
5874 SCTP_INP_RLOCK(inp);
5875 SCTP_INP_DECR_REF(inp);
5876 }
5877 }
5878 /* save away my tag to */
5879 stc.my_vtag = initack->init.initiate_tag;
5880
5881 /* set up some of the credits. */
5882 so = inp->sctp_socket;
5883 if (so == NULL) {
5884 /* memory problem */
5885 sctp_m_freem(m);
5886 return;
5887 } else {
5888 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5889 }
5890 /* set what I want */
5891 his_limit = ntohs(init_chk->init.num_inbound_streams);
5892 /* choose what I want */
5893 if (asoc != NULL) {
5894 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5895 i_want = asoc->streamoutcnt;
5896 } else {
5897 i_want = asoc->pre_open_streams;
5898 }
5899 } else {
5900 i_want = inp->sctp_ep.pre_open_stream_count;
5901 }
5902 if (his_limit < i_want) {
5903 /* I Want more :< */
5904 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5905 } else {
5906 /* I can have what I want :> */
5907 initack->init.num_outbound_streams = htons(i_want);
5908 }
5909 /* tell him his limit. */
5910 initack->init.num_inbound_streams =
5911 htons(inp->sctp_ep.max_open_streams_intome);
5912
5913 /* adaptation layer indication parameter */
5914 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5915 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
5916 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5917 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5918 ali->ph.param_length = htons(parameter_len);
5919 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5920 chunk_len += parameter_len;
5921 }
5922 /* ECN parameter */
5923 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5924 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5925 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5926 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5927 ph->param_type = htons(SCTP_ECN_CAPABLE);
5928 ph->param_length = htons(parameter_len);
5929 chunk_len += parameter_len;
5930 }
5931 /* PR-SCTP supported parameter */
5932 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5933 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5934 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5935 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5936 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5937 ph->param_length = htons(parameter_len);
5938 chunk_len += parameter_len;
5939 }
5940 /* Add NAT friendly parameter */
5941 if (nat_friendly) {
5942 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5943 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5944 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5945 ph->param_length = htons(parameter_len);
5946 chunk_len += parameter_len;
5947 }
5948 /* And now tell the peer which extensions we support */
5949 num_ext = 0;
5950 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5951 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5952 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5953 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5954 }
5955 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5956 ((asoc == NULL) && (inp->auth_supported == 1))) {
5957 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5958 }
5959 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5960 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5961 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5962 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5963 }
5964 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5965 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5966 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5967 }
5968 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5969 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5970 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5971 }
5972 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5973 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5974 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5975 }
5976 if (num_ext > 0) {
5977 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5978 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5979 pr_supported->ph.param_length = htons(parameter_len);
5980 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5981 chunk_len += parameter_len;
5982 }
5983 /* add authentication parameters */
5984 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5985 ((asoc == NULL) && (inp->auth_supported == 1))) {
5986 struct sctp_auth_random *randp;
5987 struct sctp_auth_hmac_algo *hmacs;
5988 struct sctp_auth_chunk_list *chunks;
5989
5990 if (padding_len > 0) {
5991 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5992 chunk_len += padding_len;
5993 padding_len = 0;
5994 }
5995 /* generate and add RANDOM parameter */
5996 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5997 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
5998 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5999 randp->ph.param_type = htons(SCTP_RANDOM);
6000 randp->ph.param_length = htons(parameter_len);
6001 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
6002 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6003 chunk_len += parameter_len;
6004
6005 if (padding_len > 0) {
6006 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6007 chunk_len += padding_len;
6008 padding_len = 0;
6009 }
6010 /* add HMAC_ALGO parameter */
6011 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
6012 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
6013 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
6014 (uint8_t *) hmacs->hmac_ids);
6015 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6016 hmacs->ph.param_length = htons(parameter_len);
6017 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6018 chunk_len += parameter_len;
6019
6020 if (padding_len > 0) {
6021 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6022 chunk_len += padding_len;
6023 padding_len = 0;
6024 }
6025 /* add CHUNKS parameter */
6026 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6027 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
6028 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6029 chunks->chunk_types);
6030 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6031 chunks->ph.param_length = htons(parameter_len);
6032 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6033 chunk_len += parameter_len;
6034 }
6035 SCTP_BUF_LEN(m) = chunk_len;
6036 m_last = m;
6037 /* now the addresses */
6038 /*
6039 * To optimize this we could put the scoping stuff into a structure
6040 * and remove the individual uint8's from the stc structure. Then we
6041 * could just sifa in the address within the stc.. but for now this
6042 * is a quick hack to get the address stuff teased apart.
6043 */
6044 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6045 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6046 scp.loopback_scope = stc.loopback_scope;
6047 scp.ipv4_local_scope = stc.ipv4_scope;
6048 scp.local_scope = stc.local_scope;
6049 scp.site_scope = stc.site_scope;
6050 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6051 cnt_inits_to,
6052 &padding_len, &chunk_len);
6053 /* padding_len can only be positive, if no addresses have been added */
6054 if (padding_len > 0) {
6055 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6056 chunk_len += padding_len;
6057 SCTP_BUF_LEN(m) += padding_len;
6058 padding_len = 0;
6059 }
6060 /* tack on the operational error if present */
6061 if (op_err) {
6062 parameter_len = 0;
6063 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6064 parameter_len += SCTP_BUF_LEN(m_tmp);
6065 }
6066 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6067 SCTP_BUF_NEXT(m_last) = op_err;
6068 while (SCTP_BUF_NEXT(m_last) != NULL) {
6069 m_last = SCTP_BUF_NEXT(m_last);
6070 }
6071 chunk_len += parameter_len;
6072 }
6073 if (padding_len > 0) {
6074 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6075 if (m_last == NULL) {
6076 /* Houston we have a problem, no space */
6077 sctp_m_freem(m);
6078 return;
6079 }
6080 chunk_len += padding_len;
6081 padding_len = 0;
6082 }
6083 /* Now we must build a cookie */
6084 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6085 if (m_cookie == NULL) {
6086 /* memory problem */
6087 sctp_m_freem(m);
6088 return;
6089 }
6090 /* Now append the cookie to the end and update the space/size */
6091 SCTP_BUF_NEXT(m_last) = m_cookie;
6092 parameter_len = 0;
6093 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6094 parameter_len += SCTP_BUF_LEN(m_tmp);
6095 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6096 m_last = m_tmp;
6097 }
6098 }
6099 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6100 chunk_len += parameter_len;
6101
6102 /*
6103 * Place in the size, but we don't include the last pad (if any) in
6104 * the INIT-ACK.
6105 */
6106 initack->ch.chunk_length = htons(chunk_len);
6107
6108 /*
6109 * Time to sign the cookie, we don't sign over the cookie signature
6110 * though thus we set trailer.
6111 */
6112 (void)sctp_hmac_m(SCTP_HMAC,
6113 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6114 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6115 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6116 /*
6117 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6118 * here since the timer will drive a retranmission.
6119 */
6120 if (padding_len > 0) {
6121 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6122 sctp_m_freem(m);
6123 return;
6124 }
6125 }
6126 if (stc.loopback_scope) {
6127 over_addr = (union sctp_sockstore *)dst;
6128 } else {
6129 over_addr = NULL;
6130 }
6131
6132 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6133 0, 0,
6134 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6135 port, over_addr,
6136 mflowtype, mflowid,
6137 SCTP_SO_NOT_LOCKED);
6138 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6139 }
6140
6141
6142 static void
6143 sctp_prune_prsctp(struct sctp_tcb *stcb,
6144 struct sctp_association *asoc,
6145 struct sctp_sndrcvinfo *srcv,
6146 int dataout)
6147 {
6148 int freed_spc = 0;
6149 struct sctp_tmit_chunk *chk, *nchk;
6150
6151 SCTP_TCB_LOCK_ASSERT(stcb);
6152 if ((asoc->prsctp_supported) &&
6153 (asoc->sent_queue_cnt_removeable > 0)) {
6154 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6155 /*
6156 * Look for chunks marked with the PR_SCTP flag AND
6157 * the buffer space flag. If the one being sent is
6158 * equal or greater priority then purge the old one
6159 * and free some space.
6160 */
6161 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6162 /*
6163 * This one is PR-SCTP AND buffer space
6164 * limited type
6165 */
6166 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6167 /*
6168 * Lower numbers equates to higher
6169 * priority so if the one we are
6170 * looking at has a larger or equal
6171 * priority we want to drop the data
6172 * and NOT retransmit it.
6173 */
6174 if (chk->data) {
6175 /*
6176 * We release the book_size
6177 * if the mbuf is here
6178 */
6179 int ret_spc;
6180 uint8_t sent;
6181
6182 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6183 sent = 1;
6184 else
6185 sent = 0;
6186 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6187 sent,
6188 SCTP_SO_LOCKED);
6189 freed_spc += ret_spc;
6190 if (freed_spc >= dataout) {
6191 return;
6192 }
6193 } /* if chunk was present */
6194 } /* if of sufficent priority */
6195 } /* if chunk has enabled */
6196 } /* tailqforeach */
6197
6198 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6199 /* Here we must move to the sent queue and mark */
6200 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6201 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6202 if (chk->data) {
6203 /*
6204 * We release the book_size
6205 * if the mbuf is here
6206 */
6207 int ret_spc;
6208
6209 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6210 0, SCTP_SO_LOCKED);
6211
6212 freed_spc += ret_spc;
6213 if (freed_spc >= dataout) {
6214 return;
6215 }
6216 } /* end if chk->data */
6217 } /* end if right class */
6218 } /* end if chk pr-sctp */
6219 } /* tailqforeachsafe (chk) */
6220 } /* if enabled in asoc */
6221 }
6222
6223 int
6224 sctp_get_frag_point(struct sctp_tcb *stcb,
6225 struct sctp_association *asoc)
6226 {
6227 int siz, ovh;
6228
6229 /*
6230 * For endpoints that have both v6 and v4 addresses we must reserve
6231 * room for the ipv6 header, for those that are only dealing with V4
6232 * we use a larger frag point.
6233 */
6234 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6235 ovh = SCTP_MED_OVERHEAD;
6236 } else {
6237 ovh = SCTP_MED_V4_OVERHEAD;
6238 }
6239
6240 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6241 siz = asoc->smallest_mtu - ovh;
6242 else
6243 siz = (stcb->asoc.sctp_frag_point - ovh);
6244 /*
6245 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6246 */
6247 /* A data chunk MUST fit in a cluster */
6248 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6249 /* } */
6250
6251 /* adjust for an AUTH chunk if DATA requires auth */
6252 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6253 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6254
6255 if (siz % 4) {
6256 /* make it an even word boundary please */
6257 siz -= (siz % 4);
6258 }
6259 return (siz);
6260 }
6261
6262 static void
6263 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6264 {
6265 /*
6266 * We assume that the user wants PR_SCTP_TTL if the user provides a
6267 * positive lifetime but does not specify any PR_SCTP policy.
6268 */
6269 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6270 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6271 } else if (sp->timetolive > 0) {
6272 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6273 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6274 } else {
6275 return;
6276 }
6277 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6278 case CHUNK_FLAGS_PR_SCTP_BUF:
6279 /*
6280 * Time to live is a priority stored in tv_sec when doing
6281 * the buffer drop thing.
6282 */
6283 sp->ts.tv_sec = sp->timetolive;
6284 sp->ts.tv_usec = 0;
6285 break;
6286 case CHUNK_FLAGS_PR_SCTP_TTL:
6287 {
6288 struct timeval tv;
6289
6290 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6291 tv.tv_sec = sp->timetolive / 1000;
6292 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6293 /*
6294 * TODO sctp_constants.h needs alternative time
6295 * macros when _KERNEL is undefined.
6296 */
6297 timevaladd(&sp->ts, &tv);
6298 }
6299 break;
6300 case CHUNK_FLAGS_PR_SCTP_RTX:
6301 /*
6302 * Time to live is a the number or retransmissions stored in
6303 * tv_sec.
6304 */
6305 sp->ts.tv_sec = sp->timetolive;
6306 sp->ts.tv_usec = 0;
6307 break;
6308 default:
6309 SCTPDBG(SCTP_DEBUG_USRREQ1,
6310 "Unknown PR_SCTP policy %u.\n",
6311 PR_SCTP_POLICY(sp->sinfo_flags));
6312 break;
6313 }
6314 }
6315
6316 static int
6317 sctp_msg_append(struct sctp_tcb *stcb,
6318 struct sctp_nets *net,
6319 struct mbuf *m,
6320 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6321 {
6322 int error = 0;
6323 struct mbuf *at;
6324 struct sctp_stream_queue_pending *sp = NULL;
6325 struct sctp_stream_out *strm;
6326
6327 /*
6328 * Given an mbuf chain, put it into the association send queue and
6329 * place it on the wheel
6330 */
6331 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6332 /* Invalid stream number */
6333 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6334 error = EINVAL;
6335 goto out_now;
6336 }
6337 if ((stcb->asoc.stream_locked) &&
6338 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6339 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6340 error = EINVAL;
6341 goto out_now;
6342 }
6343 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6344 /* Now can we send this? */
6345 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6346 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6347 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6348 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6349 /* got data while shutting down */
6350 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6351 error = ECONNRESET;
6352 goto out_now;
6353 }
6354 sctp_alloc_a_strmoq(stcb, sp);
6355 if (sp == NULL) {
6356 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6357 error = ENOMEM;
6358 goto out_now;
6359 }
6360 sp->sinfo_flags = srcv->sinfo_flags;
6361 sp->timetolive = srcv->sinfo_timetolive;
6362 sp->ppid = srcv->sinfo_ppid;
6363 sp->context = srcv->sinfo_context;
6364 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6365 sp->net = net;
6366 atomic_add_int(&sp->net->ref_count, 1);
6367 } else {
6368 sp->net = NULL;
6369 }
6370 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6371 sp->stream = srcv->sinfo_stream;
6372 sp->msg_is_complete = 1;
6373 sp->sender_all_done = 1;
6374 sp->some_taken = 0;
6375 sp->data = m;
6376 sp->tail_mbuf = NULL;
6377 sctp_set_prsctp_policy(sp);
6378 /*
6379 * We could in theory (for sendall) sifa the length in, but we would
6380 * still have to hunt through the chain since we need to setup the
6381 * tail_mbuf
6382 */
6383 sp->length = 0;
6384 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6385 if (SCTP_BUF_NEXT(at) == NULL)
6386 sp->tail_mbuf = at;
6387 sp->length += SCTP_BUF_LEN(at);
6388 }
6389 if (srcv->sinfo_keynumber_valid) {
6390 sp->auth_keyid = srcv->sinfo_keynumber;
6391 } else {
6392 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6393 }
6394 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6395 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6396 sp->holds_key_ref = 1;
6397 }
6398 if (hold_stcb_lock == 0) {
6399 SCTP_TCB_SEND_LOCK(stcb);
6400 }
6401 sctp_snd_sb_alloc(stcb, sp->length);
6402 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6403 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6404 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6405 m = NULL;
6406 if (hold_stcb_lock == 0) {
6407 SCTP_TCB_SEND_UNLOCK(stcb);
6408 }
6409 out_now:
6410 if (m) {
6411 sctp_m_freem(m);
6412 }
6413 return (error);
6414 }
6415
6416
6417 static struct mbuf *
6418 sctp_copy_mbufchain(struct mbuf *clonechain,
6419 struct mbuf *outchain,
6420 struct mbuf **endofchain,
6421 int can_take_mbuf,
6422 int sizeofcpy,
6423 uint8_t copy_by_ref)
6424 {
6425 struct mbuf *m;
6426 struct mbuf *appendchain;
6427 caddr_t cp;
6428 int len;
6429
6430 if (endofchain == NULL) {
6431 /* error */
6432 error_out:
6433 if (outchain)
6434 sctp_m_freem(outchain);
6435 return (NULL);
6436 }
6437 if (can_take_mbuf) {
6438 appendchain = clonechain;
6439 } else {
6440 if (!copy_by_ref &&
6441 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6442 ) {
6443 /* Its not in a cluster */
6444 if (*endofchain == NULL) {
6445 /* lets get a mbuf cluster */
6446 if (outchain == NULL) {
6447 /* This is the general case */
6448 new_mbuf:
6449 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6450 if (outchain == NULL) {
6451 goto error_out;
6452 }
6453 SCTP_BUF_LEN(outchain) = 0;
6454 *endofchain = outchain;
6455 /* get the prepend space */
6456 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6457 } else {
6458 /*
6459 * We really should not get a NULL
6460 * in endofchain
6461 */
6462 /* find end */
6463 m = outchain;
6464 while (m) {
6465 if (SCTP_BUF_NEXT(m) == NULL) {
6466 *endofchain = m;
6467 break;
6468 }
6469 m = SCTP_BUF_NEXT(m);
6470 }
6471 /* sanity */
6472 if (*endofchain == NULL) {
6473 /*
6474 * huh, TSNH XXX maybe we
6475 * should panic
6476 */
6477 sctp_m_freem(outchain);
6478 goto new_mbuf;
6479 }
6480 }
6481 /* get the new end of length */
6482 len = M_TRAILINGSPACE(*endofchain);
6483 } else {
6484 /* how much is left at the end? */
6485 len = M_TRAILINGSPACE(*endofchain);
6486 }
6487 /* Find the end of the data, for appending */
6488 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6489
6490 /* Now lets copy it out */
6491 if (len >= sizeofcpy) {
6492 /* It all fits, copy it in */
6493 m_copydata(clonechain, 0, sizeofcpy, cp);
6494 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6495 } else {
6496 /* fill up the end of the chain */
6497 if (len > 0) {
6498 m_copydata(clonechain, 0, len, cp);
6499 SCTP_BUF_LEN((*endofchain)) += len;
6500 /* now we need another one */
6501 sizeofcpy -= len;
6502 }
6503 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6504 if (m == NULL) {
6505 /* We failed */
6506 goto error_out;
6507 }
6508 SCTP_BUF_NEXT((*endofchain)) = m;
6509 *endofchain = m;
6510 cp = mtod((*endofchain), caddr_t);
6511 m_copydata(clonechain, len, sizeofcpy, cp);
6512 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6513 }
6514 return (outchain);
6515 } else {
6516 /* copy the old fashion way */
6517 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6518 #ifdef SCTP_MBUF_LOGGING
6519 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6520 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6521 }
6522 #endif
6523 }
6524 }
6525 if (appendchain == NULL) {
6526 /* error */
6527 if (outchain)
6528 sctp_m_freem(outchain);
6529 return (NULL);
6530 }
6531 if (outchain) {
6532 /* tack on to the end */
6533 if (*endofchain != NULL) {
6534 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6535 } else {
6536 m = outchain;
6537 while (m) {
6538 if (SCTP_BUF_NEXT(m) == NULL) {
6539 SCTP_BUF_NEXT(m) = appendchain;
6540 break;
6541 }
6542 m = SCTP_BUF_NEXT(m);
6543 }
6544 }
6545 /*
6546 * save off the end and update the end-chain postion
6547 */
6548 m = appendchain;
6549 while (m) {
6550 if (SCTP_BUF_NEXT(m) == NULL) {
6551 *endofchain = m;
6552 break;
6553 }
6554 m = SCTP_BUF_NEXT(m);
6555 }
6556 return (outchain);
6557 } else {
6558 /* save off the end and update the end-chain postion */
6559 m = appendchain;
6560 while (m) {
6561 if (SCTP_BUF_NEXT(m) == NULL) {
6562 *endofchain = m;
6563 break;
6564 }
6565 m = SCTP_BUF_NEXT(m);
6566 }
6567 return (appendchain);
6568 }
6569 }
6570
6571 static int
6572 sctp_med_chunk_output(struct sctp_inpcb *inp,
6573 struct sctp_tcb *stcb,
6574 struct sctp_association *asoc,
6575 int *num_out,
6576 int *reason_code,
6577 int control_only, int from_where,
6578 struct timeval *now, int *now_filled, int frag_point, int so_locked
6579 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6580 SCTP_UNUSED
6581 #endif
6582 );
6583
6584 static void
6585 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6586 uint32_t val SCTP_UNUSED)
6587 {
6588 struct sctp_copy_all *ca;
6589 struct mbuf *m;
6590 int ret = 0;
6591 int added_control = 0;
6592 int un_sent, do_chunk_output = 1;
6593 struct sctp_association *asoc;
6594 struct sctp_nets *net;
6595
6596 ca = (struct sctp_copy_all *)ptr;
6597 if (ca->m == NULL) {
6598 return;
6599 }
6600 if (ca->inp != inp) {
6601 /* TSNH */
6602 return;
6603 }
6604 if (ca->sndlen > 0) {
6605 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6606 if (m == NULL) {
6607 /* can't copy so we are done */
6608 ca->cnt_failed++;
6609 return;
6610 }
6611 #ifdef SCTP_MBUF_LOGGING
6612 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6613 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6614 }
6615 #endif
6616 } else {
6617 m = NULL;
6618 }
6619 SCTP_TCB_LOCK_ASSERT(stcb);
6620 if (stcb->asoc.alternate) {
6621 net = stcb->asoc.alternate;
6622 } else {
6623 net = stcb->asoc.primary_destination;
6624 }
6625 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6626 /* Abort this assoc with m as the user defined reason */
6627 if (m != NULL) {
6628 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6629 } else {
6630 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6631 0, M_NOWAIT, 1, MT_DATA);
6632 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6633 }
6634 if (m != NULL) {
6635 struct sctp_paramhdr *ph;
6636
6637 ph = mtod(m, struct sctp_paramhdr *);
6638 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6639 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
6640 }
6641 /*
6642 * We add one here to keep the assoc from dis-appearing on
6643 * us.
6644 */
6645 atomic_add_int(&stcb->asoc.refcnt, 1);
6646 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6647 /*
6648 * sctp_abort_an_association calls sctp_free_asoc() free
6649 * association will NOT free it since we incremented the
6650 * refcnt .. we do this to prevent it being freed and things
6651 * getting tricky since we could end up (from free_asoc)
6652 * calling inpcb_free which would get a recursive lock call
6653 * to the iterator lock.. But as a consequence of that the
6654 * stcb will return to us un-locked.. since free_asoc
6655 * returns with either no TCB or the TCB unlocked, we must
6656 * relock.. to unlock in the iterator timer :-0
6657 */
6658 SCTP_TCB_LOCK(stcb);
6659 atomic_add_int(&stcb->asoc.refcnt, -1);
6660 goto no_chunk_output;
6661 } else {
6662 if (m) {
6663 ret = sctp_msg_append(stcb, net, m,
6664 &ca->sndrcv, 1);
6665 }
6666 asoc = &stcb->asoc;
6667 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6668 /* shutdown this assoc */
6669 int cnt;
6670
6671 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6672
6673 if (TAILQ_EMPTY(&asoc->send_queue) &&
6674 TAILQ_EMPTY(&asoc->sent_queue) &&
6675 (cnt == 0)) {
6676 if (asoc->locked_on_sending) {
6677 goto abort_anyway;
6678 }
6679 /*
6680 * there is nothing queued to send, so I'm
6681 * done...
6682 */
6683 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6684 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6685 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6686 /*
6687 * only send SHUTDOWN the first time
6688 * through
6689 */
6690 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6691 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6692 }
6693 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6694 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6695 sctp_stop_timers_for_shutdown(stcb);
6696 sctp_send_shutdown(stcb, net);
6697 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6698 net);
6699 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6700 asoc->primary_destination);
6701 added_control = 1;
6702 do_chunk_output = 0;
6703 }
6704 } else {
6705 /*
6706 * we still got (or just got) data to send,
6707 * so set SHUTDOWN_PENDING
6708 */
6709 /*
6710 * XXX sockets draft says that SCTP_EOF
6711 * should be sent with no data. currently,
6712 * we will allow user data to be sent first
6713 * and move to SHUTDOWN-PENDING
6714 */
6715 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6716 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6717 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6718 if (asoc->locked_on_sending) {
6719 /*
6720 * Locked to send out the
6721 * data
6722 */
6723 struct sctp_stream_queue_pending *sp;
6724
6725 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6726 if (sp) {
6727 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6728 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6729 }
6730 }
6731 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6732 if (TAILQ_EMPTY(&asoc->send_queue) &&
6733 TAILQ_EMPTY(&asoc->sent_queue) &&
6734 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6735 struct mbuf *op_err;
6736 char msg[SCTP_DIAG_INFO_LEN];
6737
6738 abort_anyway:
6739 snprintf(msg, sizeof(msg),
6740 "%s:%d at %s", __FILE__, __LINE__, __func__);
6741 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6742 msg);
6743 atomic_add_int(&stcb->asoc.refcnt, 1);
6744 sctp_abort_an_association(stcb->sctp_ep, stcb,
6745 op_err, SCTP_SO_NOT_LOCKED);
6746 atomic_add_int(&stcb->asoc.refcnt, -1);
6747 goto no_chunk_output;
6748 }
6749 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6750 asoc->primary_destination);
6751 }
6752 }
6753
6754 }
6755 }
6756 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6757 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6758
6759 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6760 (stcb->asoc.total_flight > 0) &&
6761 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6762 do_chunk_output = 0;
6763 }
6764 if (do_chunk_output)
6765 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6766 else if (added_control) {
6767 int num_out, reason, now_filled = 0;
6768 struct timeval now;
6769 int frag_point;
6770
6771 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6772 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6773 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6774 }
6775 no_chunk_output:
6776 if (ret) {
6777 ca->cnt_failed++;
6778 } else {
6779 ca->cnt_sent++;
6780 }
6781 }
6782
6783 static void
6784 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6785 {
6786 struct sctp_copy_all *ca;
6787
6788 ca = (struct sctp_copy_all *)ptr;
6789 /*
6790 * Do a notify here? Kacheong suggests that the notify be done at
6791 * the send time.. so you would push up a notification if any send
6792 * failed. Don't know if this is feasable since the only failures we
6793 * have is "memory" related and if you cannot get an mbuf to send
6794 * the data you surely can't get an mbuf to send up to notify the
6795 * user you can't send the data :->
6796 */
6797
6798 /* now free everything */
6799 sctp_m_freem(ca->m);
6800 SCTP_FREE(ca, SCTP_M_COPYAL);
6801 }
6802
6803 static struct mbuf *
6804 sctp_copy_out_all(struct uio *uio, int len)
6805 {
6806 struct mbuf *ret, *at;
6807 int left, willcpy, cancpy, error;
6808
6809 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6810 if (ret == NULL) {
6811 /* TSNH */
6812 return (NULL);
6813 }
6814 left = len;
6815 SCTP_BUF_LEN(ret) = 0;
6816 /* save space for the data chunk header */
6817 cancpy = M_TRAILINGSPACE(ret);
6818 willcpy = min(cancpy, left);
6819 at = ret;
6820 while (left > 0) {
6821 /* Align data to the end */
6822 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6823 if (error) {
6824 err_out_now:
6825 sctp_m_freem(at);
6826 return (NULL);
6827 }
6828 SCTP_BUF_LEN(at) = willcpy;
6829 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6830 left -= willcpy;
6831 if (left > 0) {
6832 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6833 if (SCTP_BUF_NEXT(at) == NULL) {
6834 goto err_out_now;
6835 }
6836 at = SCTP_BUF_NEXT(at);
6837 SCTP_BUF_LEN(at) = 0;
6838 cancpy = M_TRAILINGSPACE(at);
6839 willcpy = min(cancpy, left);
6840 }
6841 }
6842 return (ret);
6843 }
6844
6845 static int
6846 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6847 struct sctp_sndrcvinfo *srcv)
6848 {
6849 int ret;
6850 struct sctp_copy_all *ca;
6851
6852 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6853 SCTP_M_COPYAL);
6854 if (ca == NULL) {
6855 sctp_m_freem(m);
6856 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6857 return (ENOMEM);
6858 }
6859 memset(ca, 0, sizeof(struct sctp_copy_all));
6860
6861 ca->inp = inp;
6862 if (srcv) {
6863 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6864 }
6865 /*
6866 * take off the sendall flag, it would be bad if we failed to do
6867 * this :-0
6868 */
6869 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6870 /* get length and mbuf chain */
6871 if (uio) {
6872 ca->sndlen = uio->uio_resid;
6873 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6874 if (ca->m == NULL) {
6875 SCTP_FREE(ca, SCTP_M_COPYAL);
6876 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6877 return (ENOMEM);
6878 }
6879 } else {
6880 /* Gather the length of the send */
6881 struct mbuf *mat;
6882
6883 ca->sndlen = 0;
6884 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6885 ca->sndlen += SCTP_BUF_LEN(mat);
6886 }
6887 }
6888 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6889 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6890 SCTP_ASOC_ANY_STATE,
6891 (void *)ca, 0,
6892 sctp_sendall_completes, inp, 1);
6893 if (ret) {
6894 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6895 SCTP_FREE(ca, SCTP_M_COPYAL);
6896 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6897 return (EFAULT);
6898 }
6899 return (0);
6900 }
6901
6902
6903 void
6904 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6905 {
6906 struct sctp_tmit_chunk *chk, *nchk;
6907
6908 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6909 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6910 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6911 if (chk->data) {
6912 sctp_m_freem(chk->data);
6913 chk->data = NULL;
6914 }
6915 asoc->ctrl_queue_cnt--;
6916 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6917 }
6918 }
6919 }
6920
6921 void
6922 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6923 {
6924 struct sctp_association *asoc;
6925 struct sctp_tmit_chunk *chk, *nchk;
6926 struct sctp_asconf_chunk *acp;
6927
6928 asoc = &stcb->asoc;
6929 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6930 /* find SCTP_ASCONF chunk in queue */
6931 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6932 if (chk->data) {
6933 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6934 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6935 /* Not Acked yet */
6936 break;
6937 }
6938 }
6939 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6940 if (chk->data) {
6941 sctp_m_freem(chk->data);
6942 chk->data = NULL;
6943 }
6944 asoc->ctrl_queue_cnt--;
6945 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6946 }
6947 }
6948 }
6949
6950
6951 static void
6952 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6953 struct sctp_association *asoc,
6954 struct sctp_tmit_chunk **data_list,
6955 int bundle_at,
6956 struct sctp_nets *net)
6957 {
6958 int i;
6959 struct sctp_tmit_chunk *tp1;
6960
6961 for (i = 0; i < bundle_at; i++) {
6962 /* off of the send queue */
6963 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6964 asoc->send_queue_cnt--;
6965 if (i > 0) {
6966 /*
6967 * Any chunk NOT 0 you zap the time chunk 0 gets
6968 * zapped or set based on if a RTO measurment is
6969 * needed.
6970 */
6971 data_list[i]->do_rtt = 0;
6972 }
6973 /* record time */
6974 data_list[i]->sent_rcv_time = net->last_sent_time;
6975 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6976 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6977 if (data_list[i]->whoTo == NULL) {
6978 data_list[i]->whoTo = net;
6979 atomic_add_int(&net->ref_count, 1);
6980 }
6981 /* on to the sent queue */
6982 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6983 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6984 struct sctp_tmit_chunk *tpp;
6985
6986 /* need to move back */
6987 back_up_more:
6988 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6989 if (tpp == NULL) {
6990 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6991 goto all_done;
6992 }
6993 tp1 = tpp;
6994 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6995 goto back_up_more;
6996 }
6997 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6998 } else {
6999 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7000 data_list[i],
7001 sctp_next);
7002 }
7003 all_done:
7004 /* This does not lower until the cum-ack passes it */
7005 asoc->sent_queue_cnt++;
7006 if ((asoc->peers_rwnd <= 0) &&
7007 (asoc->total_flight == 0) &&
7008 (bundle_at == 1)) {
7009 /* Mark the chunk as being a window probe */
7010 SCTP_STAT_INCR(sctps_windowprobed);
7011 }
7012 #ifdef SCTP_AUDITING_ENABLED
7013 sctp_audit_log(0xC2, 3);
7014 #endif
7015 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7016 data_list[i]->snd_count = 1;
7017 data_list[i]->rec.data.chunk_was_revoked = 0;
7018 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7019 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7020 data_list[i]->whoTo->flight_size,
7021 data_list[i]->book_size,
7022 (uintptr_t) data_list[i]->whoTo,
7023 data_list[i]->rec.data.TSN_seq);
7024 }
7025 sctp_flight_size_increase(data_list[i]);
7026 sctp_total_flight_increase(stcb, data_list[i]);
7027 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7028 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7029 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7030 }
7031 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7032 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7033 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7034 /* SWS sender side engages */
7035 asoc->peers_rwnd = 0;
7036 }
7037 }
7038 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7039 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7040 }
7041 }
7042
7043 static void
7044 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7045 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7046 SCTP_UNUSED
7047 #endif
7048 )
7049 {
7050 struct sctp_tmit_chunk *chk, *nchk;
7051
7052 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7053 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7054 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7055 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7056 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7057 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7058 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7059 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7060 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7061 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7062 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7063 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7064 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7065 /* Stray chunks must be cleaned up */
7066 clean_up_anyway:
7067 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7068 if (chk->data) {
7069 sctp_m_freem(chk->data);
7070 chk->data = NULL;
7071 }
7072 asoc->ctrl_queue_cnt--;
7073 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7074 asoc->fwd_tsn_cnt--;
7075 sctp_free_a_chunk(stcb, chk, so_locked);
7076 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7077 /* special handling, we must look into the param */
7078 if (chk != asoc->str_reset) {
7079 goto clean_up_anyway;
7080 }
7081 }
7082 }
7083 }
7084
7085
7086 static int
7087 sctp_can_we_split_this(struct sctp_tcb *stcb,
7088 uint32_t length,
7089 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7090 {
7091 /*
7092 * Make a decision on if I should split a msg into multiple parts.
7093 * This is only asked of incomplete messages.
7094 */
7095 if (eeor_on) {
7096 /*
7097 * If we are doing EEOR we need to always send it if its the
7098 * entire thing, since it might be all the guy is putting in
7099 * the hopper.
7100 */
7101 if (goal_mtu >= length) {
7102 /*-
7103 * If we have data outstanding,
7104 * we get another chance when the sack
7105 * arrives to transmit - wait for more data
7106 */
7107 if (stcb->asoc.total_flight == 0) {
7108 /*
7109 * If nothing is in flight, we zero the
7110 * packet counter.
7111 */
7112 return (length);
7113 }
7114 return (0);
7115
7116 } else {
7117 /* You can fill the rest */
7118 return (goal_mtu);
7119 }
7120 }
7121 /*-
7122 * For those strange folk that make the send buffer
7123 * smaller than our fragmentation point, we can't
7124 * get a full msg in so we have to allow splitting.
7125 */
7126 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7127 return (length);
7128 }
7129 if ((length <= goal_mtu) ||
7130 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7131 /* Sub-optimial residual don't split in non-eeor mode. */
7132 return (0);
7133 }
7134 /*
7135 * If we reach here length is larger than the goal_mtu. Do we wish
7136 * to split it for the sake of packet putting together?
7137 */
7138 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7139 /* Its ok to split it */
7140 return (min(goal_mtu, frag_point));
7141 }
7142 /* Nope, can't split */
7143 return (0);
7144
7145 }
7146
7147 static uint32_t
7148 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7149 struct sctp_stream_out *strq,
7150 uint32_t goal_mtu,
7151 uint32_t frag_point,
7152 int *locked,
7153 int *giveup,
7154 int eeor_mode,
7155 int *bail,
7156 int so_locked
7157 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7158 SCTP_UNUSED
7159 #endif
7160 )
7161 {
7162 /* Move from the stream to the send_queue keeping track of the total */
7163 struct sctp_association *asoc;
7164 struct sctp_stream_queue_pending *sp;
7165 struct sctp_tmit_chunk *chk;
7166 struct sctp_data_chunk *dchkh;
7167 uint32_t to_move, length;
7168 uint8_t rcv_flags = 0;
7169 uint8_t some_taken;
7170 uint8_t send_lock_up = 0;
7171
7172 SCTP_TCB_LOCK_ASSERT(stcb);
7173 asoc = &stcb->asoc;
7174 one_more_time:
7175 /* sa_ignore FREED_MEMORY */
7176 sp = TAILQ_FIRST(&strq->outqueue);
7177 if (sp == NULL) {
7178 *locked = 0;
7179 if (send_lock_up == 0) {
7180 SCTP_TCB_SEND_LOCK(stcb);
7181 send_lock_up = 1;
7182 }
7183 sp = TAILQ_FIRST(&strq->outqueue);
7184 if (sp) {
7185 goto one_more_time;
7186 }
7187 if (strq->last_msg_incomplete) {
7188 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7189 strq->stream_no,
7190 strq->last_msg_incomplete);
7191 strq->last_msg_incomplete = 0;
7192 }
7193 to_move = 0;
7194 if (send_lock_up) {
7195 SCTP_TCB_SEND_UNLOCK(stcb);
7196 send_lock_up = 0;
7197 }
7198 goto out_of;
7199 }
7200 if ((sp->msg_is_complete) && (sp->length == 0)) {
7201 if (sp->sender_all_done) {
7202 /*
7203 * We are doing differed cleanup. Last time through
7204 * when we took all the data the sender_all_done was
7205 * not set.
7206 */
7207 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7208 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7209 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7210 sp->sender_all_done,
7211 sp->length,
7212 sp->msg_is_complete,
7213 sp->put_last_out,
7214 send_lock_up);
7215 }
7216 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7217 SCTP_TCB_SEND_LOCK(stcb);
7218 send_lock_up = 1;
7219 }
7220 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7221 TAILQ_REMOVE(&strq->outqueue, sp, next);
7222 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7223 (strq->chunks_on_queues == 0) &&
7224 TAILQ_EMPTY(&strq->outqueue)) {
7225 stcb->asoc.trigger_reset = 1;
7226 }
7227 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7228 if (sp->net) {
7229 sctp_free_remote_addr(sp->net);
7230 sp->net = NULL;
7231 }
7232 if (sp->data) {
7233 sctp_m_freem(sp->data);
7234 sp->data = NULL;
7235 }
7236 sctp_free_a_strmoq(stcb, sp, so_locked);
7237 /* we can't be locked to it */
7238 *locked = 0;
7239 stcb->asoc.locked_on_sending = NULL;
7240 if (send_lock_up) {
7241 SCTP_TCB_SEND_UNLOCK(stcb);
7242 send_lock_up = 0;
7243 }
7244 /* back to get the next msg */
7245 goto one_more_time;
7246 } else {
7247 /*
7248 * sender just finished this but still holds a
7249 * reference
7250 */
7251 *locked = 1;
7252 *giveup = 1;
7253 to_move = 0;
7254 goto out_of;
7255 }
7256 } else {
7257 /* is there some to get */
7258 if (sp->length == 0) {
7259 /* no */
7260 *locked = 1;
7261 *giveup = 1;
7262 to_move = 0;
7263 goto out_of;
7264 } else if (sp->discard_rest) {
7265 if (send_lock_up == 0) {
7266 SCTP_TCB_SEND_LOCK(stcb);
7267 send_lock_up = 1;
7268 }
7269 /* Whack down the size */
7270 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7271 if ((stcb->sctp_socket != NULL) &&
7272 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7273 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7274 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7275 }
7276 if (sp->data) {
7277 sctp_m_freem(sp->data);
7278 sp->data = NULL;
7279 sp->tail_mbuf = NULL;
7280 }
7281 sp->length = 0;
7282 sp->some_taken = 1;
7283 *locked = 1;
7284 *giveup = 1;
7285 to_move = 0;
7286 goto out_of;
7287 }
7288 }
7289 some_taken = sp->some_taken;
7290 re_look:
7291 length = sp->length;
7292 if (sp->msg_is_complete) {
7293 /* The message is complete */
7294 to_move = min(length, frag_point);
7295 if (to_move == length) {
7296 /* All of it fits in the MTU */
7297 if (sp->some_taken) {
7298 rcv_flags |= SCTP_DATA_LAST_FRAG;
7299 sp->put_last_out = 1;
7300 } else {
7301 rcv_flags |= SCTP_DATA_NOT_FRAG;
7302 sp->put_last_out = 1;
7303 }
7304 } else {
7305 /* Not all of it fits, we fragment */
7306 if (sp->some_taken == 0) {
7307 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7308 }
7309 sp->some_taken = 1;
7310 }
7311 } else {
7312 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7313 if (to_move) {
7314 /*-
7315 * We use a snapshot of length in case it
7316 * is expanding during the compare.
7317 */
7318 uint32_t llen;
7319
7320 llen = length;
7321 if (to_move >= llen) {
7322 to_move = llen;
7323 if (send_lock_up == 0) {
7324 /*-
7325 * We are taking all of an incomplete msg
7326 * thus we need a send lock.
7327 */
7328 SCTP_TCB_SEND_LOCK(stcb);
7329 send_lock_up = 1;
7330 if (sp->msg_is_complete) {
7331 /*
7332 * the sender finished the
7333 * msg
7334 */
7335 goto re_look;
7336 }
7337 }
7338 }
7339 if (sp->some_taken == 0) {
7340 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7341 sp->some_taken = 1;
7342 }
7343 } else {
7344 /* Nothing to take. */
7345 if (sp->some_taken) {
7346 *locked = 1;
7347 }
7348 *giveup = 1;
7349 to_move = 0;
7350 goto out_of;
7351 }
7352 }
7353
7354 /* If we reach here, we can copy out a chunk */
7355 sctp_alloc_a_chunk(stcb, chk);
7356 if (chk == NULL) {
7357 /* No chunk memory */
7358 *giveup = 1;
7359 to_move = 0;
7360 goto out_of;
7361 }
7362 /*
7363 * Setup for unordered if needed by looking at the user sent info
7364 * flags.
7365 */
7366 if (sp->sinfo_flags & SCTP_UNORDERED) {
7367 rcv_flags |= SCTP_DATA_UNORDERED;
7368 }
7369 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7370 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7371 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7372 }
7373 /* clear out the chunk before setting up */
7374 memset(chk, 0, sizeof(*chk));
7375 chk->rec.data.rcv_flags = rcv_flags;
7376
7377 if (to_move >= length) {
7378 /* we think we can steal the whole thing */
7379 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7380 SCTP_TCB_SEND_LOCK(stcb);
7381 send_lock_up = 1;
7382 }
7383 if (to_move < sp->length) {
7384 /* bail, it changed */
7385 goto dont_do_it;
7386 }
7387 chk->data = sp->data;
7388 chk->last_mbuf = sp->tail_mbuf;
7389 /* register the stealing */
7390 sp->data = sp->tail_mbuf = NULL;
7391 } else {
7392 struct mbuf *m;
7393
7394 dont_do_it:
7395 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7396 chk->last_mbuf = NULL;
7397 if (chk->data == NULL) {
7398 sp->some_taken = some_taken;
7399 sctp_free_a_chunk(stcb, chk, so_locked);
7400 *bail = 1;
7401 to_move = 0;
7402 goto out_of;
7403 }
7404 #ifdef SCTP_MBUF_LOGGING
7405 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7406 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7407 }
7408 #endif
7409 /* Pull off the data */
7410 m_adj(sp->data, to_move);
7411 /* Now lets work our way down and compact it */
7412 m = sp->data;
7413 while (m && (SCTP_BUF_LEN(m) == 0)) {
7414 sp->data = SCTP_BUF_NEXT(m);
7415 SCTP_BUF_NEXT(m) = NULL;
7416 if (sp->tail_mbuf == m) {
7417 /*-
7418 * Freeing tail? TSNH since
7419 * we supposedly were taking less
7420 * than the sp->length.
7421 */
7422 #ifdef INVARIANTS
7423 panic("Huh, freing tail? - TSNH");
7424 #else
7425 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7426 sp->tail_mbuf = sp->data = NULL;
7427 sp->length = 0;
7428 #endif
7429
7430 }
7431 sctp_m_free(m);
7432 m = sp->data;
7433 }
7434 }
7435 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7436 chk->copy_by_ref = 1;
7437 } else {
7438 chk->copy_by_ref = 0;
7439 }
7440 /*
7441 * get last_mbuf and counts of mb useage This is ugly but hopefully
7442 * its only one mbuf.
7443 */
7444 if (chk->last_mbuf == NULL) {
7445 chk->last_mbuf = chk->data;
7446 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7447 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7448 }
7449 }
7450 if (to_move > length) {
7451 /*- This should not happen either
7452 * since we always lower to_move to the size
7453 * of sp->length if its larger.
7454 */
7455 #ifdef INVARIANTS
7456 panic("Huh, how can to_move be larger?");
7457 #else
7458 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7459 sp->length = 0;
7460 #endif
7461 } else {
7462 atomic_subtract_int(&sp->length, to_move);
7463 }
7464 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7465 /* Not enough room for a chunk header, get some */
7466 struct mbuf *m;
7467
7468 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7469 if (m == NULL) {
7470 /*
7471 * we're in trouble here. _PREPEND below will free
7472 * all the data if there is no leading space, so we
7473 * must put the data back and restore.
7474 */
7475 if (send_lock_up == 0) {
7476 SCTP_TCB_SEND_LOCK(stcb);
7477 send_lock_up = 1;
7478 }
7479 if (sp->data == NULL) {
7480 /* unsteal the data */
7481 sp->data = chk->data;
7482 sp->tail_mbuf = chk->last_mbuf;
7483 } else {
7484 struct mbuf *m_tmp;
7485
7486 /* reassemble the data */
7487 m_tmp = sp->data;
7488 sp->data = chk->data;
7489 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7490 }
7491 sp->some_taken = some_taken;
7492 atomic_add_int(&sp->length, to_move);
7493 chk->data = NULL;
7494 *bail = 1;
7495 sctp_free_a_chunk(stcb, chk, so_locked);
7496 to_move = 0;
7497 goto out_of;
7498 } else {
7499 SCTP_BUF_LEN(m) = 0;
7500 SCTP_BUF_NEXT(m) = chk->data;
7501 chk->data = m;
7502 M_ALIGN(chk->data, 4);
7503 }
7504 }
7505 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
7506 if (chk->data == NULL) {
7507 /* HELP, TSNH since we assured it would not above? */
7508 #ifdef INVARIANTS
7509 panic("prepend failes HELP?");
7510 #else
7511 SCTP_PRINTF("prepend fails HELP?\n");
7512 sctp_free_a_chunk(stcb, chk, so_locked);
7513 #endif
7514 *bail = 1;
7515 to_move = 0;
7516 goto out_of;
7517 }
7518 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7519 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7520 chk->book_size_scale = 0;
7521 chk->sent = SCTP_DATAGRAM_UNSENT;
7522
7523 chk->flags = 0;
7524 chk->asoc = &stcb->asoc;
7525 chk->pad_inplace = 0;
7526 chk->no_fr_allowed = 0;
7527 chk->rec.data.stream_seq = strq->next_sequence_send;
7528 if ((rcv_flags & SCTP_DATA_LAST_FRAG) &&
7529 !(rcv_flags & SCTP_DATA_UNORDERED)) {
7530 strq->next_sequence_send++;
7531 }
7532 chk->rec.data.stream_number = sp->stream;
7533 chk->rec.data.payloadtype = sp->ppid;
7534 chk->rec.data.context = sp->context;
7535 chk->rec.data.doing_fast_retransmit = 0;
7536
7537 chk->rec.data.timetodrop = sp->ts;
7538 chk->flags = sp->act_flags;
7539
7540 if (sp->net) {
7541 chk->whoTo = sp->net;
7542 atomic_add_int(&chk->whoTo->ref_count, 1);
7543 } else
7544 chk->whoTo = NULL;
7545
7546 if (sp->holds_key_ref) {
7547 chk->auth_keyid = sp->auth_keyid;
7548 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7549 chk->holds_key_ref = 1;
7550 }
7551 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7552 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7553 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7554 (uintptr_t) stcb, sp->length,
7555 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7556 chk->rec.data.TSN_seq);
7557 }
7558 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7559 /*
7560 * Put the rest of the things in place now. Size was done earlier in
7561 * previous loop prior to padding.
7562 */
7563
7564 #ifdef SCTP_ASOCLOG_OF_TSNS
7565 SCTP_TCB_LOCK_ASSERT(stcb);
7566 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7567 asoc->tsn_out_at = 0;
7568 asoc->tsn_out_wrapped = 1;
7569 }
7570 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7571 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7572 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7573 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7574 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7575 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7576 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7577 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7578 asoc->tsn_out_at++;
7579 #endif
7580
7581 dchkh->ch.chunk_type = SCTP_DATA;
7582 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7583 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7584 dchkh->dp.stream_id = htons(strq->stream_no);
7585 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7586 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7587 dchkh->ch.chunk_length = htons(chk->send_size);
7588 /* Now advance the chk->send_size by the actual pad needed. */
7589 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7590 /* need a pad */
7591 struct mbuf *lm;
7592 int pads;
7593
7594 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7595 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7596 if (lm != NULL) {
7597 chk->last_mbuf = lm;
7598 chk->pad_inplace = 1;
7599 }
7600 chk->send_size += pads;
7601 }
7602 if (PR_SCTP_ENABLED(chk->flags)) {
7603 asoc->pr_sctp_cnt++;
7604 }
7605 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7606 /* All done pull and kill the message */
7607 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7608 if (sp->put_last_out == 0) {
7609 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7610 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7611 sp->sender_all_done,
7612 sp->length,
7613 sp->msg_is_complete,
7614 sp->put_last_out,
7615 send_lock_up);
7616 }
7617 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7618 SCTP_TCB_SEND_LOCK(stcb);
7619 send_lock_up = 1;
7620 }
7621 TAILQ_REMOVE(&strq->outqueue, sp, next);
7622 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7623 (strq->chunks_on_queues == 0) &&
7624 TAILQ_EMPTY(&strq->outqueue)) {
7625 stcb->asoc.trigger_reset = 1;
7626 }
7627 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7628 if (sp->net) {
7629 sctp_free_remote_addr(sp->net);
7630 sp->net = NULL;
7631 }
7632 if (sp->data) {
7633 sctp_m_freem(sp->data);
7634 sp->data = NULL;
7635 }
7636 sctp_free_a_strmoq(stcb, sp, so_locked);
7637
7638 /* we can't be locked to it */
7639 *locked = 0;
7640 stcb->asoc.locked_on_sending = NULL;
7641 } else {
7642 /* more to go, we are locked */
7643 *locked = 1;
7644 }
7645 asoc->chunks_on_out_queue++;
7646 strq->chunks_on_queues++;
7647 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7648 asoc->send_queue_cnt++;
7649 out_of:
7650 if (send_lock_up) {
7651 SCTP_TCB_SEND_UNLOCK(stcb);
7652 }
7653 return (to_move);
7654 }
7655
7656
7657 static void
7658 sctp_fill_outqueue(struct sctp_tcb *stcb,
7659 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7660 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7661 SCTP_UNUSED
7662 #endif
7663 )
7664 {
7665 struct sctp_association *asoc;
7666 struct sctp_stream_out *strq;
7667 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7668 int locked, giveup;
7669
7670 SCTP_TCB_LOCK_ASSERT(stcb);
7671 asoc = &stcb->asoc;
7672 switch (net->ro._l_addr.sa.sa_family) {
7673 #ifdef INET
7674 case AF_INET:
7675 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7676 break;
7677 #endif
7678 #ifdef INET6
7679 case AF_INET6:
7680 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7681 break;
7682 #endif
7683 default:
7684 /* TSNH */
7685 goal_mtu = net->mtu;
7686 break;
7687 }
7688 /* Need an allowance for the data chunk header too */
7689 goal_mtu -= sizeof(struct sctp_data_chunk);
7690
7691 /* must make even word boundary */
7692 goal_mtu &= 0xfffffffc;
7693 if (asoc->locked_on_sending) {
7694 /* We are stuck on one stream until the message completes. */
7695 strq = asoc->locked_on_sending;
7696 locked = 1;
7697 } else {
7698 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7699 locked = 0;
7700 }
7701 while ((goal_mtu > 0) && strq) {
7702 giveup = 0;
7703 bail = 0;
7704 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7705 &giveup, eeor_mode, &bail, so_locked);
7706 if (moved_how_much)
7707 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7708
7709 if (locked) {
7710 asoc->locked_on_sending = strq;
7711 if ((moved_how_much == 0) || (giveup) || bail)
7712 /* no more to move for now */
7713 break;
7714 } else {
7715 asoc->locked_on_sending = NULL;
7716 if ((giveup) || bail) {
7717 break;
7718 }
7719 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7720 if (strq == NULL) {
7721 break;
7722 }
7723 }
7724 total_moved += moved_how_much;
7725 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7726 goal_mtu &= 0xfffffffc;
7727 }
7728 if (bail)
7729 *quit_now = 1;
7730
7731 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7732
7733 if (total_moved == 0) {
7734 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7735 (net == stcb->asoc.primary_destination)) {
7736 /* ran dry for primary network net */
7737 SCTP_STAT_INCR(sctps_primary_randry);
7738 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7739 /* ran dry with CMT on */
7740 SCTP_STAT_INCR(sctps_cmt_randry);
7741 }
7742 }
7743 }
7744
7745 void
7746 sctp_fix_ecn_echo(struct sctp_association *asoc)
7747 {
7748 struct sctp_tmit_chunk *chk;
7749
7750 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7751 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7752 chk->sent = SCTP_DATAGRAM_UNSENT;
7753 }
7754 }
7755 }
7756
7757 void
7758 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7759 {
7760 struct sctp_association *asoc;
7761 struct sctp_tmit_chunk *chk;
7762 struct sctp_stream_queue_pending *sp;
7763 unsigned int i;
7764
7765 if (net == NULL) {
7766 return;
7767 }
7768 asoc = &stcb->asoc;
7769 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7770 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7771 if (sp->net == net) {
7772 sctp_free_remote_addr(sp->net);
7773 sp->net = NULL;
7774 }
7775 }
7776 }
7777 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7778 if (chk->whoTo == net) {
7779 sctp_free_remote_addr(chk->whoTo);
7780 chk->whoTo = NULL;
7781 }
7782 }
7783 }
7784
7785 int
7786 sctp_med_chunk_output(struct sctp_inpcb *inp,
7787 struct sctp_tcb *stcb,
7788 struct sctp_association *asoc,
7789 int *num_out,
7790 int *reason_code,
7791 int control_only, int from_where,
7792 struct timeval *now, int *now_filled, int frag_point, int so_locked
7793 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7794 SCTP_UNUSED
7795 #endif
7796 )
7797 {
7798 /**
7799 * Ok this is the generic chunk service queue. we must do the
7800 * following: - Service the stream queue that is next, moving any
7801 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7802 * LAST to the out queue in one pass) and assigning TSN's - Check to
7803 * see if the cwnd/rwnd allows any output, if so we go ahead and
7804 * fomulate and send the low level chunks. Making sure to combine
7805 * any control in the control chunk queue also.
7806 */
7807 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7808 struct mbuf *outchain, *endoutchain;
7809 struct sctp_tmit_chunk *chk, *nchk;
7810
7811 /* temp arrays for unlinking */
7812 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7813 int no_fragmentflg, error;
7814 unsigned int max_rwnd_per_dest, max_send_per_dest;
7815 int one_chunk, hbflag, skip_data_for_this_net;
7816 int asconf, cookie, no_out_cnt;
7817 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7818 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7819 int tsns_sent = 0;
7820 uint32_t auth_offset = 0;
7821 struct sctp_auth_chunk *auth = NULL;
7822 uint16_t auth_keyid;
7823 int override_ok = 1;
7824 int skip_fill_up = 0;
7825 int data_auth_reqd = 0;
7826
7827 /*
7828 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7829 * destination.
7830 */
7831 int quit_now = 0;
7832
7833 *num_out = 0;
7834 *reason_code = 0;
7835 auth_keyid = stcb->asoc.authinfo.active_keyid;
7836 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7837 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7838 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7839 eeor_mode = 1;
7840 } else {
7841 eeor_mode = 0;
7842 }
7843 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7844 /*
7845 * First lets prime the pump. For each destination, if there is room
7846 * in the flight size, attempt to pull an MTU's worth out of the
7847 * stream queues into the general send_queue
7848 */
7849 #ifdef SCTP_AUDITING_ENABLED
7850 sctp_audit_log(0xC2, 2);
7851 #endif
7852 SCTP_TCB_LOCK_ASSERT(stcb);
7853 hbflag = 0;
7854 if (control_only)
7855 no_data_chunks = 1;
7856 else
7857 no_data_chunks = 0;
7858
7859 /* Nothing to possible to send? */
7860 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7861 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7862 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7863 TAILQ_EMPTY(&asoc->send_queue) &&
7864 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7865 nothing_to_send:
7866 *reason_code = 9;
7867 return (0);
7868 }
7869 if (asoc->peers_rwnd == 0) {
7870 /* No room in peers rwnd */
7871 *reason_code = 1;
7872 if (asoc->total_flight > 0) {
7873 /* we are allowed one chunk in flight */
7874 no_data_chunks = 1;
7875 }
7876 }
7877 if (stcb->asoc.ecn_echo_cnt_onq) {
7878 /* Record where a sack goes, if any */
7879 if (no_data_chunks &&
7880 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7881 /* Nothing but ECNe to send - we don't do that */
7882 goto nothing_to_send;
7883 }
7884 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7885 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7886 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7887 sack_goes_to = chk->whoTo;
7888 break;
7889 }
7890 }
7891 }
7892 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7893 if (stcb->sctp_socket)
7894 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7895 else
7896 max_send_per_dest = 0;
7897 if (no_data_chunks == 0) {
7898 /* How many non-directed chunks are there? */
7899 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7900 if (chk->whoTo == NULL) {
7901 /*
7902 * We already have non-directed chunks on
7903 * the queue, no need to do a fill-up.
7904 */
7905 skip_fill_up = 1;
7906 break;
7907 }
7908 }
7909
7910 }
7911 if ((no_data_chunks == 0) &&
7912 (skip_fill_up == 0) &&
7913 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7914 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7915 /*
7916 * This for loop we are in takes in each net, if
7917 * its's got space in cwnd and has data sent to it
7918 * (when CMT is off) then it calls
7919 * sctp_fill_outqueue for the net. This gets data on
7920 * the send queue for that network.
7921 *
7922 * In sctp_fill_outqueue TSN's are assigned and data is
7923 * copied out of the stream buffers. Note mostly
7924 * copy by reference (we hope).
7925 */
7926 net->window_probe = 0;
7927 if ((net != stcb->asoc.alternate) &&
7928 ((net->dest_state & SCTP_ADDR_PF) ||
7929 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7930 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7931 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7932 sctp_log_cwnd(stcb, net, 1,
7933 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7934 }
7935 continue;
7936 }
7937 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7938 (net->flight_size == 0)) {
7939 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7940 }
7941 if (net->flight_size >= net->cwnd) {
7942 /* skip this network, no room - can't fill */
7943 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7944 sctp_log_cwnd(stcb, net, 3,
7945 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7946 }
7947 continue;
7948 }
7949 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7950 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7951 }
7952 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7953 if (quit_now) {
7954 /* memory alloc failure */
7955 no_data_chunks = 1;
7956 break;
7957 }
7958 }
7959 }
7960 /* now service each destination and send out what we can for it */
7961 /* Nothing to send? */
7962 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7963 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7964 TAILQ_EMPTY(&asoc->send_queue)) {
7965 *reason_code = 8;
7966 return (0);
7967 }
7968 if (asoc->sctp_cmt_on_off > 0) {
7969 /* get the last start point */
7970 start_at = asoc->last_net_cmt_send_started;
7971 if (start_at == NULL) {
7972 /* null so to beginning */
7973 start_at = TAILQ_FIRST(&asoc->nets);
7974 } else {
7975 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7976 if (start_at == NULL) {
7977 start_at = TAILQ_FIRST(&asoc->nets);
7978 }
7979 }
7980 asoc->last_net_cmt_send_started = start_at;
7981 } else {
7982 start_at = TAILQ_FIRST(&asoc->nets);
7983 }
7984 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7985 if (chk->whoTo == NULL) {
7986 if (asoc->alternate) {
7987 chk->whoTo = asoc->alternate;
7988 } else {
7989 chk->whoTo = asoc->primary_destination;
7990 }
7991 atomic_add_int(&chk->whoTo->ref_count, 1);
7992 }
7993 }
7994 old_start_at = NULL;
7995 again_one_more_time:
7996 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7997 /* how much can we send? */
7998 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7999 if (old_start_at && (old_start_at == net)) {
8000 /* through list ocmpletely. */
8001 break;
8002 }
8003 tsns_sent = 0xa;
8004 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8005 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8006 (net->flight_size >= net->cwnd)) {
8007 /*
8008 * Nothing on control or asconf and flight is full,
8009 * we can skip even in the CMT case.
8010 */
8011 continue;
8012 }
8013 bundle_at = 0;
8014 endoutchain = outchain = NULL;
8015 no_fragmentflg = 1;
8016 one_chunk = 0;
8017 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8018 skip_data_for_this_net = 1;
8019 } else {
8020 skip_data_for_this_net = 0;
8021 }
8022 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
8023 /*
8024 * if we have a route and an ifp check to see if we
8025 * have room to send to this guy
8026 */
8027 struct ifnet *ifp;
8028
8029 ifp = net->ro.ro_rt->rt_ifp;
8030 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
8031 SCTP_STAT_INCR(sctps_ifnomemqueued);
8032 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
8033 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
8034 }
8035 continue;
8036 }
8037 }
8038 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8039 #ifdef INET
8040 case AF_INET:
8041 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8042 break;
8043 #endif
8044 #ifdef INET6
8045 case AF_INET6:
8046 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8047 break;
8048 #endif
8049 default:
8050 /* TSNH */
8051 mtu = net->mtu;
8052 break;
8053 }
8054 mx_mtu = mtu;
8055 to_out = 0;
8056 if (mtu > asoc->peers_rwnd) {
8057 if (asoc->total_flight > 0) {
8058 /* We have a packet in flight somewhere */
8059 r_mtu = asoc->peers_rwnd;
8060 } else {
8061 /* We are always allowed to send one MTU out */
8062 one_chunk = 1;
8063 r_mtu = mtu;
8064 }
8065 } else {
8066 r_mtu = mtu;
8067 }
8068 error = 0;
8069 /************************/
8070 /* ASCONF transmission */
8071 /************************/
8072 /* Now first lets go through the asconf queue */
8073 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8074 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8075 continue;
8076 }
8077 if (chk->whoTo == NULL) {
8078 if (asoc->alternate == NULL) {
8079 if (asoc->primary_destination != net) {
8080 break;
8081 }
8082 } else {
8083 if (asoc->alternate != net) {
8084 break;
8085 }
8086 }
8087 } else {
8088 if (chk->whoTo != net) {
8089 break;
8090 }
8091 }
8092 if (chk->data == NULL) {
8093 break;
8094 }
8095 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8096 chk->sent != SCTP_DATAGRAM_RESEND) {
8097 break;
8098 }
8099 /*
8100 * if no AUTH is yet included and this chunk
8101 * requires it, make sure to account for it. We
8102 * don't apply the size until the AUTH chunk is
8103 * actually added below in case there is no room for
8104 * this chunk. NOTE: we overload the use of "omtu"
8105 * here
8106 */
8107 if ((auth == NULL) &&
8108 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8109 stcb->asoc.peer_auth_chunks)) {
8110 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8111 } else
8112 omtu = 0;
8113 /* Here we do NOT factor the r_mtu */
8114 if ((chk->send_size < (int)(mtu - omtu)) ||
8115 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8116 /*
8117 * We probably should glom the mbuf chain
8118 * from the chk->data for control but the
8119 * problem is it becomes yet one more level
8120 * of tracking to do if for some reason
8121 * output fails. Then I have got to
8122 * reconstruct the merged control chain.. el
8123 * yucko.. for now we take the easy way and
8124 * do the copy
8125 */
8126 /*
8127 * Add an AUTH chunk, if chunk requires it
8128 * save the offset into the chain for AUTH
8129 */
8130 if ((auth == NULL) &&
8131 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8132 stcb->asoc.peer_auth_chunks))) {
8133 outchain = sctp_add_auth_chunk(outchain,
8134 &endoutchain,
8135 &auth,
8136 &auth_offset,
8137 stcb,
8138 chk->rec.chunk_id.id);
8139 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8140 }
8141 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8142 (int)chk->rec.chunk_id.can_take_data,
8143 chk->send_size, chk->copy_by_ref);
8144 if (outchain == NULL) {
8145 *reason_code = 8;
8146 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8147 return (ENOMEM);
8148 }
8149 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8150 /* update our MTU size */
8151 if (mtu > (chk->send_size + omtu))
8152 mtu -= (chk->send_size + omtu);
8153 else
8154 mtu = 0;
8155 to_out += (chk->send_size + omtu);
8156 /* Do clear IP_DF ? */
8157 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8158 no_fragmentflg = 0;
8159 }
8160 if (chk->rec.chunk_id.can_take_data)
8161 chk->data = NULL;
8162 /*
8163 * set hb flag since we can use these for
8164 * RTO
8165 */
8166 hbflag = 1;
8167 asconf = 1;
8168 /*
8169 * should sysctl this: don't bundle data
8170 * with ASCONF since it requires AUTH
8171 */
8172 no_data_chunks = 1;
8173 chk->sent = SCTP_DATAGRAM_SENT;
8174 if (chk->whoTo == NULL) {
8175 chk->whoTo = net;
8176 atomic_add_int(&net->ref_count, 1);
8177 }
8178 chk->snd_count++;
8179 if (mtu == 0) {
8180 /*
8181 * Ok we are out of room but we can
8182 * output without effecting the
8183 * flight size since this little guy
8184 * is a control only packet.
8185 */
8186 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8187 /*
8188 * do NOT clear the asconf flag as
8189 * it is used to do appropriate
8190 * source address selection.
8191 */
8192 if (*now_filled == 0) {
8193 (void)SCTP_GETTIME_TIMEVAL(now);
8194 *now_filled = 1;
8195 }
8196 net->last_sent_time = *now;
8197 hbflag = 0;
8198 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8199 (struct sockaddr *)&net->ro._l_addr,
8200 outchain, auth_offset, auth,
8201 stcb->asoc.authinfo.active_keyid,
8202 no_fragmentflg, 0, asconf,
8203 inp->sctp_lport, stcb->rport,
8204 htonl(stcb->asoc.peer_vtag),
8205 net->port, NULL,
8206 0, 0,
8207 so_locked))) {
8208 /*
8209 * error, we could not
8210 * output
8211 */
8212 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8213 if (from_where == 0) {
8214 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8215 }
8216 if (error == ENOBUFS) {
8217 asoc->ifp_had_enobuf = 1;
8218 SCTP_STAT_INCR(sctps_lowlevelerr);
8219 }
8220 /* error, could not output */
8221 if (error == EHOSTUNREACH) {
8222 /*
8223 * Destination went
8224 * unreachable
8225 * during this send
8226 */
8227 sctp_move_chunks_from_net(stcb, net);
8228 }
8229 *reason_code = 7;
8230 break;
8231 } else {
8232 asoc->ifp_had_enobuf = 0;
8233 }
8234 /*
8235 * increase the number we sent, if a
8236 * cookie is sent we don't tell them
8237 * any was sent out.
8238 */
8239 outchain = endoutchain = NULL;
8240 auth = NULL;
8241 auth_offset = 0;
8242 if (!no_out_cnt)
8243 *num_out += ctl_cnt;
8244 /* recalc a clean slate and setup */
8245 switch (net->ro._l_addr.sa.sa_family) {
8246 #ifdef INET
8247 case AF_INET:
8248 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8249 break;
8250 #endif
8251 #ifdef INET6
8252 case AF_INET6:
8253 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8254 break;
8255 #endif
8256 default:
8257 /* TSNH */
8258 mtu = net->mtu;
8259 break;
8260 }
8261 to_out = 0;
8262 no_fragmentflg = 1;
8263 }
8264 }
8265 }
8266 if (error != 0) {
8267 /* try next net */
8268 continue;
8269 }
8270 /************************/
8271 /* Control transmission */
8272 /************************/
8273 /* Now first lets go through the control queue */
8274 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8275 if ((sack_goes_to) &&
8276 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8277 (chk->whoTo != sack_goes_to)) {
8278 /*
8279 * if we have a sack in queue, and we are
8280 * looking at an ecn echo that is NOT queued
8281 * to where the sack is going..
8282 */
8283 if (chk->whoTo == net) {
8284 /*
8285 * Don't transmit it to where its
8286 * going (current net)
8287 */
8288 continue;
8289 } else if (sack_goes_to == net) {
8290 /*
8291 * But do transmit it to this
8292 * address
8293 */
8294 goto skip_net_check;
8295 }
8296 }
8297 if (chk->whoTo == NULL) {
8298 if (asoc->alternate == NULL) {
8299 if (asoc->primary_destination != net) {
8300 continue;
8301 }
8302 } else {
8303 if (asoc->alternate != net) {
8304 continue;
8305 }
8306 }
8307 } else {
8308 if (chk->whoTo != net) {
8309 continue;
8310 }
8311 }
8312 skip_net_check:
8313 if (chk->data == NULL) {
8314 continue;
8315 }
8316 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8317 /*
8318 * It must be unsent. Cookies and ASCONF's
8319 * hang around but there timers will force
8320 * when marked for resend.
8321 */
8322 continue;
8323 }
8324 /*
8325 * if no AUTH is yet included and this chunk
8326 * requires it, make sure to account for it. We
8327 * don't apply the size until the AUTH chunk is
8328 * actually added below in case there is no room for
8329 * this chunk. NOTE: we overload the use of "omtu"
8330 * here
8331 */
8332 if ((auth == NULL) &&
8333 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8334 stcb->asoc.peer_auth_chunks)) {
8335 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8336 } else
8337 omtu = 0;
8338 /* Here we do NOT factor the r_mtu */
8339 if ((chk->send_size <= (int)(mtu - omtu)) ||
8340 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8341 /*
8342 * We probably should glom the mbuf chain
8343 * from the chk->data for control but the
8344 * problem is it becomes yet one more level
8345 * of tracking to do if for some reason
8346 * output fails. Then I have got to
8347 * reconstruct the merged control chain.. el
8348 * yucko.. for now we take the easy way and
8349 * do the copy
8350 */
8351 /*
8352 * Add an AUTH chunk, if chunk requires it
8353 * save the offset into the chain for AUTH
8354 */
8355 if ((auth == NULL) &&
8356 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8357 stcb->asoc.peer_auth_chunks))) {
8358 outchain = sctp_add_auth_chunk(outchain,
8359 &endoutchain,
8360 &auth,
8361 &auth_offset,
8362 stcb,
8363 chk->rec.chunk_id.id);
8364 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8365 }
8366 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8367 (int)chk->rec.chunk_id.can_take_data,
8368 chk->send_size, chk->copy_by_ref);
8369 if (outchain == NULL) {
8370 *reason_code = 8;
8371 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8372 return (ENOMEM);
8373 }
8374 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8375 /* update our MTU size */
8376 if (mtu > (chk->send_size + omtu))
8377 mtu -= (chk->send_size + omtu);
8378 else
8379 mtu = 0;
8380 to_out += (chk->send_size + omtu);
8381 /* Do clear IP_DF ? */
8382 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8383 no_fragmentflg = 0;
8384 }
8385 if (chk->rec.chunk_id.can_take_data)
8386 chk->data = NULL;
8387 /* Mark things to be removed, if needed */
8388 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8389 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8390 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8391 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8392 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8393 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8394 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8395 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8396 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8397 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8398 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8399 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8400 hbflag = 1;
8401 }
8402 /* remove these chunks at the end */
8403 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8404 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8405 /* turn off the timer */
8406 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8407 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8408 inp, stcb, net,
8409 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8410 }
8411 }
8412 ctl_cnt++;
8413 } else {
8414 /*
8415 * Other chunks, since they have
8416 * timers running (i.e. COOKIE) we
8417 * just "trust" that it gets sent or
8418 * retransmitted.
8419 */
8420 ctl_cnt++;
8421 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8422 cookie = 1;
8423 no_out_cnt = 1;
8424 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8425 /*
8426 * Increment ecne send count
8427 * here this means we may be
8428 * over-zealous in our
8429 * counting if the send
8430 * fails, but its the best
8431 * place to do it (we used
8432 * to do it in the queue of
8433 * the chunk, but that did
8434 * not tell how many times
8435 * it was sent.
8436 */
8437 SCTP_STAT_INCR(sctps_sendecne);
8438 }
8439 chk->sent = SCTP_DATAGRAM_SENT;
8440 if (chk->whoTo == NULL) {
8441 chk->whoTo = net;
8442 atomic_add_int(&net->ref_count, 1);
8443 }
8444 chk->snd_count++;
8445 }
8446 if (mtu == 0) {
8447 /*
8448 * Ok we are out of room but we can
8449 * output without effecting the
8450 * flight size since this little guy
8451 * is a control only packet.
8452 */
8453 if (asconf) {
8454 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8455 /*
8456 * do NOT clear the asconf
8457 * flag as it is used to do
8458 * appropriate source
8459 * address selection.
8460 */
8461 }
8462 if (cookie) {
8463 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8464 cookie = 0;
8465 }
8466 /* Only HB or ASCONF advances time */
8467 if (hbflag) {
8468 if (*now_filled == 0) {
8469 (void)SCTP_GETTIME_TIMEVAL(now);
8470 *now_filled = 1;
8471 }
8472 net->last_sent_time = *now;
8473 hbflag = 0;
8474 }
8475 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8476 (struct sockaddr *)&net->ro._l_addr,
8477 outchain,
8478 auth_offset, auth,
8479 stcb->asoc.authinfo.active_keyid,
8480 no_fragmentflg, 0, asconf,
8481 inp->sctp_lport, stcb->rport,
8482 htonl(stcb->asoc.peer_vtag),
8483 net->port, NULL,
8484 0, 0,
8485 so_locked))) {
8486 /*
8487 * error, we could not
8488 * output
8489 */
8490 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8491 if (from_where == 0) {
8492 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8493 }
8494 if (error == ENOBUFS) {
8495 asoc->ifp_had_enobuf = 1;
8496 SCTP_STAT_INCR(sctps_lowlevelerr);
8497 }
8498 if (error == EHOSTUNREACH) {
8499 /*
8500 * Destination went
8501 * unreachable
8502 * during this send
8503 */
8504 sctp_move_chunks_from_net(stcb, net);
8505 }
8506 *reason_code = 7;
8507 break;
8508 } else {
8509 asoc->ifp_had_enobuf = 0;
8510 }
8511 /*
8512 * increase the number we sent, if a
8513 * cookie is sent we don't tell them
8514 * any was sent out.
8515 */
8516 outchain = endoutchain = NULL;
8517 auth = NULL;
8518 auth_offset = 0;
8519 if (!no_out_cnt)
8520 *num_out += ctl_cnt;
8521 /* recalc a clean slate and setup */
8522 switch (net->ro._l_addr.sa.sa_family) {
8523 #ifdef INET
8524 case AF_INET:
8525 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8526 break;
8527 #endif
8528 #ifdef INET6
8529 case AF_INET6:
8530 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8531 break;
8532 #endif
8533 default:
8534 /* TSNH */
8535 mtu = net->mtu;
8536 break;
8537 }
8538 to_out = 0;
8539 no_fragmentflg = 1;
8540 }
8541 }
8542 }
8543 if (error != 0) {
8544 /* try next net */
8545 continue;
8546 }
8547 /* JRI: if dest is in PF state, do not send data to it */
8548 if ((asoc->sctp_cmt_on_off > 0) &&
8549 (net != stcb->asoc.alternate) &&
8550 (net->dest_state & SCTP_ADDR_PF)) {
8551 goto no_data_fill;
8552 }
8553 if (net->flight_size >= net->cwnd) {
8554 goto no_data_fill;
8555 }
8556 if ((asoc->sctp_cmt_on_off > 0) &&
8557 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8558 (net->flight_size > max_rwnd_per_dest)) {
8559 goto no_data_fill;
8560 }
8561 /*
8562 * We need a specific accounting for the usage of the send
8563 * buffer. We also need to check the number of messages per
8564 * net. For now, this is better than nothing and it disabled
8565 * by default...
8566 */
8567 if ((asoc->sctp_cmt_on_off > 0) &&
8568 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8569 (max_send_per_dest > 0) &&
8570 (net->flight_size > max_send_per_dest)) {
8571 goto no_data_fill;
8572 }
8573 /*********************/
8574 /* Data transmission */
8575 /*********************/
8576 /*
8577 * if AUTH for DATA is required and no AUTH has been added
8578 * yet, account for this in the mtu now... if no data can be
8579 * bundled, this adjustment won't matter anyways since the
8580 * packet will be going out...
8581 */
8582 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8583 stcb->asoc.peer_auth_chunks);
8584 if (data_auth_reqd && (auth == NULL)) {
8585 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8586 }
8587 /* now lets add any data within the MTU constraints */
8588 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8589 #ifdef INET
8590 case AF_INET:
8591 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8592 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8593 else
8594 omtu = 0;
8595 break;
8596 #endif
8597 #ifdef INET6
8598 case AF_INET6:
8599 if (net->mtu > SCTP_MIN_OVERHEAD)
8600 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8601 else
8602 omtu = 0;
8603 break;
8604 #endif
8605 default:
8606 /* TSNH */
8607 omtu = 0;
8608 break;
8609 }
8610 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
8611 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8612 (skip_data_for_this_net == 0)) ||
8613 (cookie)) {
8614 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8615 if (no_data_chunks) {
8616 /* let only control go out */
8617 *reason_code = 1;
8618 break;
8619 }
8620 if (net->flight_size >= net->cwnd) {
8621 /* skip this net, no room for data */
8622 *reason_code = 2;
8623 break;
8624 }
8625 if ((chk->whoTo != NULL) &&
8626 (chk->whoTo != net)) {
8627 /* Don't send the chunk on this net */
8628 continue;
8629 }
8630 if (asoc->sctp_cmt_on_off == 0) {
8631 if ((asoc->alternate) &&
8632 (asoc->alternate != net) &&
8633 (chk->whoTo == NULL)) {
8634 continue;
8635 } else if ((net != asoc->primary_destination) &&
8636 (asoc->alternate == NULL) &&
8637 (chk->whoTo == NULL)) {
8638 continue;
8639 }
8640 }
8641 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8642 /*-
8643 * strange, we have a chunk that is
8644 * to big for its destination and
8645 * yet no fragment ok flag.
8646 * Something went wrong when the
8647 * PMTU changed...we did not mark
8648 * this chunk for some reason?? I
8649 * will fix it here by letting IP
8650 * fragment it for now and printing
8651 * a warning. This really should not
8652 * happen ...
8653 */
8654 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8655 chk->send_size, mtu);
8656 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8657 }
8658 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8659 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8660 struct sctp_data_chunk *dchkh;
8661
8662 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8663 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8664 }
8665 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8666 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8667 /* ok we will add this one */
8668
8669 /*
8670 * Add an AUTH chunk, if chunk
8671 * requires it, save the offset into
8672 * the chain for AUTH
8673 */
8674 if (data_auth_reqd) {
8675 if (auth == NULL) {
8676 outchain = sctp_add_auth_chunk(outchain,
8677 &endoutchain,
8678 &auth,
8679 &auth_offset,
8680 stcb,
8681 SCTP_DATA);
8682 auth_keyid = chk->auth_keyid;
8683 override_ok = 0;
8684 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8685 } else if (override_ok) {
8686 /*
8687 * use this data's
8688 * keyid
8689 */
8690 auth_keyid = chk->auth_keyid;
8691 override_ok = 0;
8692 } else if (auth_keyid != chk->auth_keyid) {
8693 /*
8694 * different keyid,
8695 * so done bundling
8696 */
8697 break;
8698 }
8699 }
8700 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8701 chk->send_size, chk->copy_by_ref);
8702 if (outchain == NULL) {
8703 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8704 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8705 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8706 }
8707 *reason_code = 3;
8708 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8709 return (ENOMEM);
8710 }
8711 /* upate our MTU size */
8712 /* Do clear IP_DF ? */
8713 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8714 no_fragmentflg = 0;
8715 }
8716 /* unsigned subtraction of mtu */
8717 if (mtu > chk->send_size)
8718 mtu -= chk->send_size;
8719 else
8720 mtu = 0;
8721 /* unsigned subtraction of r_mtu */
8722 if (r_mtu > chk->send_size)
8723 r_mtu -= chk->send_size;
8724 else
8725 r_mtu = 0;
8726
8727 to_out += chk->send_size;
8728 if ((to_out > mx_mtu) && no_fragmentflg) {
8729 #ifdef INVARIANTS
8730 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8731 #else
8732 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8733 mx_mtu, to_out);
8734 #endif
8735 }
8736 chk->window_probe = 0;
8737 data_list[bundle_at++] = chk;
8738 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8739 break;
8740 }
8741 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8742 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8743 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8744 } else {
8745 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8746 }
8747 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8748 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8749 /*
8750 * Count number of
8751 * user msg's that
8752 * were fragmented
8753 * we do this by
8754 * counting when we
8755 * see a LAST
8756 * fragment only.
8757 */
8758 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8759 }
8760 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8761 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8762 data_list[0]->window_probe = 1;
8763 net->window_probe = 1;
8764 }
8765 break;
8766 }
8767 } else {
8768 /*
8769 * Must be sent in order of the
8770 * TSN's (on a network)
8771 */
8772 break;
8773 }
8774 } /* for (chunk gather loop for this net) */
8775 } /* if asoc.state OPEN */
8776 no_data_fill:
8777 /* Is there something to send for this destination? */
8778 if (outchain) {
8779 /* We may need to start a control timer or two */
8780 if (asconf) {
8781 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8782 stcb, net);
8783 /*
8784 * do NOT clear the asconf flag as it is
8785 * used to do appropriate source address
8786 * selection.
8787 */
8788 }
8789 if (cookie) {
8790 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8791 cookie = 0;
8792 }
8793 /* must start a send timer if data is being sent */
8794 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8795 /*
8796 * no timer running on this destination
8797 * restart it.
8798 */
8799 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8800 }
8801 if (bundle_at || hbflag) {
8802 /* For data/asconf and hb set time */
8803 if (*now_filled == 0) {
8804 (void)SCTP_GETTIME_TIMEVAL(now);
8805 *now_filled = 1;
8806 }
8807 net->last_sent_time = *now;
8808 }
8809 /* Now send it, if there is anything to send :> */
8810 if ((error = sctp_lowlevel_chunk_output(inp,
8811 stcb,
8812 net,
8813 (struct sockaddr *)&net->ro._l_addr,
8814 outchain,
8815 auth_offset,
8816 auth,
8817 auth_keyid,
8818 no_fragmentflg,
8819 bundle_at,
8820 asconf,
8821 inp->sctp_lport, stcb->rport,
8822 htonl(stcb->asoc.peer_vtag),
8823 net->port, NULL,
8824 0, 0,
8825 so_locked))) {
8826 /* error, we could not output */
8827 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8828 if (from_where == 0) {
8829 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8830 }
8831 if (error == ENOBUFS) {
8832 SCTP_STAT_INCR(sctps_lowlevelerr);
8833 asoc->ifp_had_enobuf = 1;
8834 }
8835 if (error == EHOSTUNREACH) {
8836 /*
8837 * Destination went unreachable
8838 * during this send
8839 */
8840 sctp_move_chunks_from_net(stcb, net);
8841 }
8842 *reason_code = 6;
8843 /*-
8844 * I add this line to be paranoid. As far as
8845 * I can tell the continue, takes us back to
8846 * the top of the for, but just to make sure
8847 * I will reset these again here.
8848 */
8849 ctl_cnt = bundle_at = 0;
8850 continue; /* This takes us back to the
8851 * for() for the nets. */
8852 } else {
8853 asoc->ifp_had_enobuf = 0;
8854 }
8855 endoutchain = NULL;
8856 auth = NULL;
8857 auth_offset = 0;
8858 if (!no_out_cnt) {
8859 *num_out += (ctl_cnt + bundle_at);
8860 }
8861 if (bundle_at) {
8862 /* setup for a RTO measurement */
8863 tsns_sent = data_list[0]->rec.data.TSN_seq;
8864 /* fill time if not already filled */
8865 if (*now_filled == 0) {
8866 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8867 *now_filled = 1;
8868 *now = asoc->time_last_sent;
8869 } else {
8870 asoc->time_last_sent = *now;
8871 }
8872 if (net->rto_needed) {
8873 data_list[0]->do_rtt = 1;
8874 net->rto_needed = 0;
8875 }
8876 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8877 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8878 }
8879 if (one_chunk) {
8880 break;
8881 }
8882 }
8883 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8884 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8885 }
8886 }
8887 if (old_start_at == NULL) {
8888 old_start_at = start_at;
8889 start_at = TAILQ_FIRST(&asoc->nets);
8890 if (old_start_at)
8891 goto again_one_more_time;
8892 }
8893 /*
8894 * At the end there should be no NON timed chunks hanging on this
8895 * queue.
8896 */
8897 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8898 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8899 }
8900 if ((*num_out == 0) && (*reason_code == 0)) {
8901 *reason_code = 4;
8902 } else {
8903 *reason_code = 5;
8904 }
8905 sctp_clean_up_ctl(stcb, asoc, so_locked);
8906 return (0);
8907 }
8908
8909 void
8910 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8911 {
8912 /*-
8913 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8914 * the control chunk queue.
8915 */
8916 struct sctp_chunkhdr *hdr;
8917 struct sctp_tmit_chunk *chk;
8918 struct mbuf *mat, *last_mbuf;
8919 uint32_t chunk_length;
8920 uint16_t padding_length;
8921
8922 SCTP_TCB_LOCK_ASSERT(stcb);
8923 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8924 if (op_err == NULL) {
8925 return;
8926 }
8927 last_mbuf = NULL;
8928 chunk_length = 0;
8929 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8930 chunk_length += SCTP_BUF_LEN(mat);
8931 if (SCTP_BUF_NEXT(mat) == NULL) {
8932 last_mbuf = mat;
8933 }
8934 }
8935 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8936 sctp_m_freem(op_err);
8937 return;
8938 }
8939 padding_length = chunk_length % 4;
8940 if (padding_length != 0) {
8941 padding_length = 4 - padding_length;
8942 }
8943 if (padding_length != 0) {
8944 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8945 sctp_m_freem(op_err);
8946 return;
8947 }
8948 }
8949 sctp_alloc_a_chunk(stcb, chk);
8950 if (chk == NULL) {
8951 /* no memory */
8952 sctp_m_freem(op_err);
8953 return;
8954 }
8955 chk->copy_by_ref = 0;
8956 chk->send_size = (uint16_t) chunk_length;
8957 chk->sent = SCTP_DATAGRAM_UNSENT;
8958 chk->snd_count = 0;
8959 chk->asoc = &stcb->asoc;
8960 chk->data = op_err;
8961 chk->whoTo = NULL;
8962 hdr = mtod(op_err, struct sctp_chunkhdr *);
8963 hdr->chunk_type = SCTP_OPERATION_ERROR;
8964 hdr->chunk_flags = 0;
8965 hdr->chunk_length = htons(chk->send_size);
8966 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8967 chk->asoc->ctrl_queue_cnt++;
8968 }
8969
8970 int
8971 sctp_send_cookie_echo(struct mbuf *m,
8972 int offset,
8973 struct sctp_tcb *stcb,
8974 struct sctp_nets *net)
8975 {
8976 /*-
8977 * pull out the cookie and put it at the front of the control chunk
8978 * queue.
8979 */
8980 int at;
8981 struct mbuf *cookie;
8982 struct sctp_paramhdr parm, *phdr;
8983 struct sctp_chunkhdr *hdr;
8984 struct sctp_tmit_chunk *chk;
8985 uint16_t ptype, plen;
8986
8987 SCTP_TCB_LOCK_ASSERT(stcb);
8988 /* First find the cookie in the param area */
8989 cookie = NULL;
8990 at = offset + sizeof(struct sctp_init_chunk);
8991 for (;;) {
8992 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8993 if (phdr == NULL) {
8994 return (-3);
8995 }
8996 ptype = ntohs(phdr->param_type);
8997 plen = ntohs(phdr->param_length);
8998 if (ptype == SCTP_STATE_COOKIE) {
8999 int pad;
9000
9001 /* found the cookie */
9002 if ((pad = (plen % 4))) {
9003 plen += 4 - pad;
9004 }
9005 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
9006 if (cookie == NULL) {
9007 /* No memory */
9008 return (-2);
9009 }
9010 #ifdef SCTP_MBUF_LOGGING
9011 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9012 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9013 }
9014 #endif
9015 break;
9016 }
9017 at += SCTP_SIZE32(plen);
9018 }
9019 /* ok, we got the cookie lets change it into a cookie echo chunk */
9020 /* first the change from param to cookie */
9021 hdr = mtod(cookie, struct sctp_chunkhdr *);
9022 hdr->chunk_type = SCTP_COOKIE_ECHO;
9023 hdr->chunk_flags = 0;
9024 /* get the chunk stuff now and place it in the FRONT of the queue */
9025 sctp_alloc_a_chunk(stcb, chk);
9026 if (chk == NULL) {
9027 /* no memory */
9028 sctp_m_freem(cookie);
9029 return (-5);
9030 }
9031 chk->copy_by_ref = 0;
9032 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9033 chk->rec.chunk_id.can_take_data = 0;
9034 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9035 chk->send_size = plen;
9036 chk->sent = SCTP_DATAGRAM_UNSENT;
9037 chk->snd_count = 0;
9038 chk->asoc = &stcb->asoc;
9039 chk->data = cookie;
9040 chk->whoTo = net;
9041 atomic_add_int(&chk->whoTo->ref_count, 1);
9042 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9043 chk->asoc->ctrl_queue_cnt++;
9044 return (0);
9045 }
9046
9047 void
9048 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9049 struct mbuf *m,
9050 int offset,
9051 int chk_length,
9052 struct sctp_nets *net)
9053 {
9054 /*
9055 * take a HB request and make it into a HB ack and send it.
9056 */
9057 struct mbuf *outchain;
9058 struct sctp_chunkhdr *chdr;
9059 struct sctp_tmit_chunk *chk;
9060
9061
9062 if (net == NULL)
9063 /* must have a net pointer */
9064 return;
9065
9066 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9067 if (outchain == NULL) {
9068 /* gak out of memory */
9069 return;
9070 }
9071 #ifdef SCTP_MBUF_LOGGING
9072 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9073 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9074 }
9075 #endif
9076 chdr = mtod(outchain, struct sctp_chunkhdr *);
9077 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9078 chdr->chunk_flags = 0;
9079 if (chk_length % 4) {
9080 /* need pad */
9081 uint32_t cpthis = 0;
9082 int padlen;
9083
9084 padlen = 4 - (chk_length % 4);
9085 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9086 }
9087 sctp_alloc_a_chunk(stcb, chk);
9088 if (chk == NULL) {
9089 /* no memory */
9090 sctp_m_freem(outchain);
9091 return;
9092 }
9093 chk->copy_by_ref = 0;
9094 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9095 chk->rec.chunk_id.can_take_data = 1;
9096 chk->flags = 0;
9097 chk->send_size = chk_length;
9098 chk->sent = SCTP_DATAGRAM_UNSENT;
9099 chk->snd_count = 0;
9100 chk->asoc = &stcb->asoc;
9101 chk->data = outchain;
9102 chk->whoTo = net;
9103 atomic_add_int(&chk->whoTo->ref_count, 1);
9104 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9105 chk->asoc->ctrl_queue_cnt++;
9106 }
9107
9108 void
9109 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9110 {
9111 /* formulate and queue a cookie-ack back to sender */
9112 struct mbuf *cookie_ack;
9113 struct sctp_chunkhdr *hdr;
9114 struct sctp_tmit_chunk *chk;
9115
9116 SCTP_TCB_LOCK_ASSERT(stcb);
9117
9118 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9119 if (cookie_ack == NULL) {
9120 /* no mbuf's */
9121 return;
9122 }
9123 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9124 sctp_alloc_a_chunk(stcb, chk);
9125 if (chk == NULL) {
9126 /* no memory */
9127 sctp_m_freem(cookie_ack);
9128 return;
9129 }
9130 chk->copy_by_ref = 0;
9131 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9132 chk->rec.chunk_id.can_take_data = 1;
9133 chk->flags = 0;
9134 chk->send_size = sizeof(struct sctp_chunkhdr);
9135 chk->sent = SCTP_DATAGRAM_UNSENT;
9136 chk->snd_count = 0;
9137 chk->asoc = &stcb->asoc;
9138 chk->data = cookie_ack;
9139 if (chk->asoc->last_control_chunk_from != NULL) {
9140 chk->whoTo = chk->asoc->last_control_chunk_from;
9141 atomic_add_int(&chk->whoTo->ref_count, 1);
9142 } else {
9143 chk->whoTo = NULL;
9144 }
9145 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9146 hdr->chunk_type = SCTP_COOKIE_ACK;
9147 hdr->chunk_flags = 0;
9148 hdr->chunk_length = htons(chk->send_size);
9149 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9150 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9151 chk->asoc->ctrl_queue_cnt++;
9152 return;
9153 }
9154
9155
9156 void
9157 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9158 {
9159 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9160 struct mbuf *m_shutdown_ack;
9161 struct sctp_shutdown_ack_chunk *ack_cp;
9162 struct sctp_tmit_chunk *chk;
9163
9164 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9165 if (m_shutdown_ack == NULL) {
9166 /* no mbuf's */
9167 return;
9168 }
9169 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9170 sctp_alloc_a_chunk(stcb, chk);
9171 if (chk == NULL) {
9172 /* no memory */
9173 sctp_m_freem(m_shutdown_ack);
9174 return;
9175 }
9176 chk->copy_by_ref = 0;
9177 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9178 chk->rec.chunk_id.can_take_data = 1;
9179 chk->flags = 0;
9180 chk->send_size = sizeof(struct sctp_chunkhdr);
9181 chk->sent = SCTP_DATAGRAM_UNSENT;
9182 chk->snd_count = 0;
9183 chk->flags = 0;
9184 chk->asoc = &stcb->asoc;
9185 chk->data = m_shutdown_ack;
9186 chk->whoTo = net;
9187 if (chk->whoTo) {
9188 atomic_add_int(&chk->whoTo->ref_count, 1);
9189 }
9190 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9191 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9192 ack_cp->ch.chunk_flags = 0;
9193 ack_cp->ch.chunk_length = htons(chk->send_size);
9194 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9195 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9196 chk->asoc->ctrl_queue_cnt++;
9197 return;
9198 }
9199
9200 void
9201 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9202 {
9203 /* formulate and queue a SHUTDOWN to the sender */
9204 struct mbuf *m_shutdown;
9205 struct sctp_shutdown_chunk *shutdown_cp;
9206 struct sctp_tmit_chunk *chk;
9207
9208 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9209 if (m_shutdown == NULL) {
9210 /* no mbuf's */
9211 return;
9212 }
9213 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9214 sctp_alloc_a_chunk(stcb, chk);
9215 if (chk == NULL) {
9216 /* no memory */
9217 sctp_m_freem(m_shutdown);
9218 return;
9219 }
9220 chk->copy_by_ref = 0;
9221 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9222 chk->rec.chunk_id.can_take_data = 1;
9223 chk->flags = 0;
9224 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9225 chk->sent = SCTP_DATAGRAM_UNSENT;
9226 chk->snd_count = 0;
9227 chk->flags = 0;
9228 chk->asoc = &stcb->asoc;
9229 chk->data = m_shutdown;
9230 chk->whoTo = net;
9231 if (chk->whoTo) {
9232 atomic_add_int(&chk->whoTo->ref_count, 1);
9233 }
9234 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9235 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9236 shutdown_cp->ch.chunk_flags = 0;
9237 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9238 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9239 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9240 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9241 chk->asoc->ctrl_queue_cnt++;
9242 return;
9243 }
9244
9245 void
9246 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9247 {
9248 /*
9249 * formulate and queue an ASCONF to the peer. ASCONF parameters
9250 * should be queued on the assoc queue.
9251 */
9252 struct sctp_tmit_chunk *chk;
9253 struct mbuf *m_asconf;
9254 int len;
9255
9256 SCTP_TCB_LOCK_ASSERT(stcb);
9257
9258 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9259 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9260 /* can't send a new one if there is one in flight already */
9261 return;
9262 }
9263 /* compose an ASCONF chunk, maximum length is PMTU */
9264 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9265 if (m_asconf == NULL) {
9266 return;
9267 }
9268 sctp_alloc_a_chunk(stcb, chk);
9269 if (chk == NULL) {
9270 /* no memory */
9271 sctp_m_freem(m_asconf);
9272 return;
9273 }
9274 chk->copy_by_ref = 0;
9275 chk->rec.chunk_id.id = SCTP_ASCONF;
9276 chk->rec.chunk_id.can_take_data = 0;
9277 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9278 chk->data = m_asconf;
9279 chk->send_size = len;
9280 chk->sent = SCTP_DATAGRAM_UNSENT;
9281 chk->snd_count = 0;
9282 chk->asoc = &stcb->asoc;
9283 chk->whoTo = net;
9284 if (chk->whoTo) {
9285 atomic_add_int(&chk->whoTo->ref_count, 1);
9286 }
9287 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9288 chk->asoc->ctrl_queue_cnt++;
9289 return;
9290 }
9291
9292 void
9293 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9294 {
9295 /*
9296 * formulate and queue a asconf-ack back to sender. the asconf-ack
9297 * must be stored in the tcb.
9298 */
9299 struct sctp_tmit_chunk *chk;
9300 struct sctp_asconf_ack *ack, *latest_ack;
9301 struct mbuf *m_ack;
9302 struct sctp_nets *net = NULL;
9303
9304 SCTP_TCB_LOCK_ASSERT(stcb);
9305 /* Get the latest ASCONF-ACK */
9306 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9307 if (latest_ack == NULL) {
9308 return;
9309 }
9310 if (latest_ack->last_sent_to != NULL &&
9311 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9312 /* we're doing a retransmission */
9313 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9314 if (net == NULL) {
9315 /* no alternate */
9316 if (stcb->asoc.last_control_chunk_from == NULL) {
9317 if (stcb->asoc.alternate) {
9318 net = stcb->asoc.alternate;
9319 } else {
9320 net = stcb->asoc.primary_destination;
9321 }
9322 } else {
9323 net = stcb->asoc.last_control_chunk_from;
9324 }
9325 }
9326 } else {
9327 /* normal case */
9328 if (stcb->asoc.last_control_chunk_from == NULL) {
9329 if (stcb->asoc.alternate) {
9330 net = stcb->asoc.alternate;
9331 } else {
9332 net = stcb->asoc.primary_destination;
9333 }
9334 } else {
9335 net = stcb->asoc.last_control_chunk_from;
9336 }
9337 }
9338 latest_ack->last_sent_to = net;
9339
9340 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9341 if (ack->data == NULL) {
9342 continue;
9343 }
9344 /* copy the asconf_ack */
9345 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9346 if (m_ack == NULL) {
9347 /* couldn't copy it */
9348 return;
9349 }
9350 #ifdef SCTP_MBUF_LOGGING
9351 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9352 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9353 }
9354 #endif
9355
9356 sctp_alloc_a_chunk(stcb, chk);
9357 if (chk == NULL) {
9358 /* no memory */
9359 if (m_ack)
9360 sctp_m_freem(m_ack);
9361 return;
9362 }
9363 chk->copy_by_ref = 0;
9364 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9365 chk->rec.chunk_id.can_take_data = 1;
9366 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9367 chk->whoTo = net;
9368 if (chk->whoTo) {
9369 atomic_add_int(&chk->whoTo->ref_count, 1);
9370 }
9371 chk->data = m_ack;
9372 chk->send_size = ack->len;
9373 chk->sent = SCTP_DATAGRAM_UNSENT;
9374 chk->snd_count = 0;
9375 chk->asoc = &stcb->asoc;
9376
9377 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9378 chk->asoc->ctrl_queue_cnt++;
9379 }
9380 return;
9381 }
9382
9383
9384 static int
9385 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9386 struct sctp_tcb *stcb,
9387 struct sctp_association *asoc,
9388 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9389 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9390 SCTP_UNUSED
9391 #endif
9392 )
9393 {
9394 /*-
9395 * send out one MTU of retransmission. If fast_retransmit is
9396 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9397 * rwnd. For a Cookie or Asconf in the control chunk queue we
9398 * retransmit them by themselves.
9399 *
9400 * For data chunks we will pick out the lowest TSN's in the sent_queue
9401 * marked for resend and bundle them all together (up to a MTU of
9402 * destination). The address to send to should have been
9403 * selected/changed where the retransmission was marked (i.e. in FR
9404 * or t3-timeout routines).
9405 */
9406 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9407 struct sctp_tmit_chunk *chk, *fwd;
9408 struct mbuf *m, *endofchain;
9409 struct sctp_nets *net = NULL;
9410 uint32_t tsns_sent = 0;
9411 int no_fragmentflg, bundle_at, cnt_thru;
9412 unsigned int mtu;
9413 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9414 struct sctp_auth_chunk *auth = NULL;
9415 uint32_t auth_offset = 0;
9416 uint16_t auth_keyid;
9417 int override_ok = 1;
9418 int data_auth_reqd = 0;
9419 uint32_t dmtu = 0;
9420
9421 SCTP_TCB_LOCK_ASSERT(stcb);
9422 tmr_started = ctl_cnt = bundle_at = error = 0;
9423 no_fragmentflg = 1;
9424 fwd_tsn = 0;
9425 *cnt_out = 0;
9426 fwd = NULL;
9427 endofchain = m = NULL;
9428 auth_keyid = stcb->asoc.authinfo.active_keyid;
9429 #ifdef SCTP_AUDITING_ENABLED
9430 sctp_audit_log(0xC3, 1);
9431 #endif
9432 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9433 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9434 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9435 asoc->sent_queue_retran_cnt);
9436 asoc->sent_queue_cnt = 0;
9437 asoc->sent_queue_cnt_removeable = 0;
9438 /* send back 0/0 so we enter normal transmission */
9439 *cnt_out = 0;
9440 return (0);
9441 }
9442 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9443 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9444 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9445 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9446 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9447 continue;
9448 }
9449 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9450 if (chk != asoc->str_reset) {
9451 /*
9452 * not eligible for retran if its
9453 * not ours
9454 */
9455 continue;
9456 }
9457 }
9458 ctl_cnt++;
9459 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9460 fwd_tsn = 1;
9461 }
9462 /*
9463 * Add an AUTH chunk, if chunk requires it save the
9464 * offset into the chain for AUTH
9465 */
9466 if ((auth == NULL) &&
9467 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9468 stcb->asoc.peer_auth_chunks))) {
9469 m = sctp_add_auth_chunk(m, &endofchain,
9470 &auth, &auth_offset,
9471 stcb,
9472 chk->rec.chunk_id.id);
9473 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9474 }
9475 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9476 break;
9477 }
9478 }
9479 one_chunk = 0;
9480 cnt_thru = 0;
9481 /* do we have control chunks to retransmit? */
9482 if (m != NULL) {
9483 /* Start a timer no matter if we suceed or fail */
9484 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9485 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9486 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9487 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9488 chk->snd_count++; /* update our count */
9489 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9490 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9491 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9492 no_fragmentflg, 0, 0,
9493 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9494 chk->whoTo->port, NULL,
9495 0, 0,
9496 so_locked))) {
9497 SCTP_STAT_INCR(sctps_lowlevelerr);
9498 return (error);
9499 }
9500 endofchain = NULL;
9501 auth = NULL;
9502 auth_offset = 0;
9503 /*
9504 * We don't want to mark the net->sent time here since this
9505 * we use this for HB and retrans cannot measure RTT
9506 */
9507 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9508 *cnt_out += 1;
9509 chk->sent = SCTP_DATAGRAM_SENT;
9510 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9511 if (fwd_tsn == 0) {
9512 return (0);
9513 } else {
9514 /* Clean up the fwd-tsn list */
9515 sctp_clean_up_ctl(stcb, asoc, so_locked);
9516 return (0);
9517 }
9518 }
9519 /*
9520 * Ok, it is just data retransmission we need to do or that and a
9521 * fwd-tsn with it all.
9522 */
9523 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9524 return (SCTP_RETRAN_DONE);
9525 }
9526 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9527 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9528 /* not yet open, resend the cookie and that is it */
9529 return (1);
9530 }
9531 #ifdef SCTP_AUDITING_ENABLED
9532 sctp_auditing(20, inp, stcb, NULL);
9533 #endif
9534 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9535 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9536 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9537 /* No, not sent to this net or not ready for rtx */
9538 continue;
9539 }
9540 if (chk->data == NULL) {
9541 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9542 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9543 continue;
9544 }
9545 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9546 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9547 struct mbuf *op_err;
9548 char msg[SCTP_DIAG_INFO_LEN];
9549
9550 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9551 chk->rec.data.TSN_seq, chk->snd_count);
9552 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9553 msg);
9554 atomic_add_int(&stcb->asoc.refcnt, 1);
9555 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9556 so_locked);
9557 SCTP_TCB_LOCK(stcb);
9558 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9559 return (SCTP_RETRAN_EXIT);
9560 }
9561 /* pick up the net */
9562 net = chk->whoTo;
9563 switch (net->ro._l_addr.sa.sa_family) {
9564 #ifdef INET
9565 case AF_INET:
9566 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9567 break;
9568 #endif
9569 #ifdef INET6
9570 case AF_INET6:
9571 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9572 break;
9573 #endif
9574 default:
9575 /* TSNH */
9576 mtu = net->mtu;
9577 break;
9578 }
9579
9580 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9581 /* No room in peers rwnd */
9582 uint32_t tsn;
9583
9584 tsn = asoc->last_acked_seq + 1;
9585 if (tsn == chk->rec.data.TSN_seq) {
9586 /*
9587 * we make a special exception for this
9588 * case. The peer has no rwnd but is missing
9589 * the lowest chunk.. which is probably what
9590 * is holding up the rwnd.
9591 */
9592 goto one_chunk_around;
9593 }
9594 return (1);
9595 }
9596 one_chunk_around:
9597 if (asoc->peers_rwnd < mtu) {
9598 one_chunk = 1;
9599 if ((asoc->peers_rwnd == 0) &&
9600 (asoc->total_flight == 0)) {
9601 chk->window_probe = 1;
9602 chk->whoTo->window_probe = 1;
9603 }
9604 }
9605 #ifdef SCTP_AUDITING_ENABLED
9606 sctp_audit_log(0xC3, 2);
9607 #endif
9608 bundle_at = 0;
9609 m = NULL;
9610 net->fast_retran_ip = 0;
9611 if (chk->rec.data.doing_fast_retransmit == 0) {
9612 /*
9613 * if no FR in progress skip destination that have
9614 * flight_size > cwnd.
9615 */
9616 if (net->flight_size >= net->cwnd) {
9617 continue;
9618 }
9619 } else {
9620 /*
9621 * Mark the destination net to have FR recovery
9622 * limits put on it.
9623 */
9624 *fr_done = 1;
9625 net->fast_retran_ip = 1;
9626 }
9627
9628 /*
9629 * if no AUTH is yet included and this chunk requires it,
9630 * make sure to account for it. We don't apply the size
9631 * until the AUTH chunk is actually added below in case
9632 * there is no room for this chunk.
9633 */
9634 if (data_auth_reqd && (auth == NULL)) {
9635 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9636 } else
9637 dmtu = 0;
9638
9639 if ((chk->send_size <= (mtu - dmtu)) ||
9640 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9641 /* ok we will add this one */
9642 if (data_auth_reqd) {
9643 if (auth == NULL) {
9644 m = sctp_add_auth_chunk(m,
9645 &endofchain,
9646 &auth,
9647 &auth_offset,
9648 stcb,
9649 SCTP_DATA);
9650 auth_keyid = chk->auth_keyid;
9651 override_ok = 0;
9652 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9653 } else if (override_ok) {
9654 auth_keyid = chk->auth_keyid;
9655 override_ok = 0;
9656 } else if (chk->auth_keyid != auth_keyid) {
9657 /* different keyid, so done bundling */
9658 break;
9659 }
9660 }
9661 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9662 if (m == NULL) {
9663 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9664 return (ENOMEM);
9665 }
9666 /* Do clear IP_DF ? */
9667 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9668 no_fragmentflg = 0;
9669 }
9670 /* upate our MTU size */
9671 if (mtu > (chk->send_size + dmtu))
9672 mtu -= (chk->send_size + dmtu);
9673 else
9674 mtu = 0;
9675 data_list[bundle_at++] = chk;
9676 if (one_chunk && (asoc->total_flight <= 0)) {
9677 SCTP_STAT_INCR(sctps_windowprobed);
9678 }
9679 }
9680 if (one_chunk == 0) {
9681 /*
9682 * now are there anymore forward from chk to pick
9683 * up?
9684 */
9685 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9686 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9687 /* Nope, not for retran */
9688 continue;
9689 }
9690 if (fwd->whoTo != net) {
9691 /* Nope, not the net in question */
9692 continue;
9693 }
9694 if (data_auth_reqd && (auth == NULL)) {
9695 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9696 } else
9697 dmtu = 0;
9698 if (fwd->send_size <= (mtu - dmtu)) {
9699 if (data_auth_reqd) {
9700 if (auth == NULL) {
9701 m = sctp_add_auth_chunk(m,
9702 &endofchain,
9703 &auth,
9704 &auth_offset,
9705 stcb,
9706 SCTP_DATA);
9707 auth_keyid = fwd->auth_keyid;
9708 override_ok = 0;
9709 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9710 } else if (override_ok) {
9711 auth_keyid = fwd->auth_keyid;
9712 override_ok = 0;
9713 } else if (fwd->auth_keyid != auth_keyid) {
9714 /*
9715 * different keyid,
9716 * so done bundling
9717 */
9718 break;
9719 }
9720 }
9721 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9722 if (m == NULL) {
9723 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9724 return (ENOMEM);
9725 }
9726 /* Do clear IP_DF ? */
9727 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9728 no_fragmentflg = 0;
9729 }
9730 /* upate our MTU size */
9731 if (mtu > (fwd->send_size + dmtu))
9732 mtu -= (fwd->send_size + dmtu);
9733 else
9734 mtu = 0;
9735 data_list[bundle_at++] = fwd;
9736 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9737 break;
9738 }
9739 } else {
9740 /* can't fit so we are done */
9741 break;
9742 }
9743 }
9744 }
9745 /* Is there something to send for this destination? */
9746 if (m) {
9747 /*
9748 * No matter if we fail/or suceed we should start a
9749 * timer. A failure is like a lost IP packet :-)
9750 */
9751 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9752 /*
9753 * no timer running on this destination
9754 * restart it.
9755 */
9756 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9757 tmr_started = 1;
9758 }
9759 /* Now lets send it, if there is anything to send :> */
9760 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9761 (struct sockaddr *)&net->ro._l_addr, m,
9762 auth_offset, auth, auth_keyid,
9763 no_fragmentflg, 0, 0,
9764 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9765 net->port, NULL,
9766 0, 0,
9767 so_locked))) {
9768 /* error, we could not output */
9769 SCTP_STAT_INCR(sctps_lowlevelerr);
9770 return (error);
9771 }
9772 endofchain = NULL;
9773 auth = NULL;
9774 auth_offset = 0;
9775 /* For HB's */
9776 /*
9777 * We don't want to mark the net->sent time here
9778 * since this we use this for HB and retrans cannot
9779 * measure RTT
9780 */
9781 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9782
9783 /* For auto-close */
9784 cnt_thru++;
9785 if (*now_filled == 0) {
9786 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9787 *now = asoc->time_last_sent;
9788 *now_filled = 1;
9789 } else {
9790 asoc->time_last_sent = *now;
9791 }
9792 *cnt_out += bundle_at;
9793 #ifdef SCTP_AUDITING_ENABLED
9794 sctp_audit_log(0xC4, bundle_at);
9795 #endif
9796 if (bundle_at) {
9797 tsns_sent = data_list[0]->rec.data.TSN_seq;
9798 }
9799 for (i = 0; i < bundle_at; i++) {
9800 SCTP_STAT_INCR(sctps_sendretransdata);
9801 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9802 /*
9803 * When we have a revoked data, and we
9804 * retransmit it, then we clear the revoked
9805 * flag since this flag dictates if we
9806 * subtracted from the fs
9807 */
9808 if (data_list[i]->rec.data.chunk_was_revoked) {
9809 /* Deflate the cwnd */
9810 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9811 data_list[i]->rec.data.chunk_was_revoked = 0;
9812 }
9813 data_list[i]->snd_count++;
9814 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9815 /* record the time */
9816 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9817 if (data_list[i]->book_size_scale) {
9818 /*
9819 * need to double the book size on
9820 * this one
9821 */
9822 data_list[i]->book_size_scale = 0;
9823 /*
9824 * Since we double the booksize, we
9825 * must also double the output queue
9826 * size, since this get shrunk when
9827 * we free by this amount.
9828 */
9829 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9830 data_list[i]->book_size *= 2;
9831
9832
9833 } else {
9834 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9835 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9836 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9837 }
9838 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9839 (uint32_t) (data_list[i]->send_size +
9840 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9841 }
9842 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9843 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9844 data_list[i]->whoTo->flight_size,
9845 data_list[i]->book_size,
9846 (uintptr_t) data_list[i]->whoTo,
9847 data_list[i]->rec.data.TSN_seq);
9848 }
9849 sctp_flight_size_increase(data_list[i]);
9850 sctp_total_flight_increase(stcb, data_list[i]);
9851 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9852 /* SWS sender side engages */
9853 asoc->peers_rwnd = 0;
9854 }
9855 if ((i == 0) &&
9856 (data_list[i]->rec.data.doing_fast_retransmit)) {
9857 SCTP_STAT_INCR(sctps_sendfastretrans);
9858 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9859 (tmr_started == 0)) {
9860 /*-
9861 * ok we just fast-retrans'd
9862 * the lowest TSN, i.e the
9863 * first on the list. In
9864 * this case we want to give
9865 * some more time to get a
9866 * SACK back without a
9867 * t3-expiring.
9868 */
9869 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9870 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9871 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9872 }
9873 }
9874 }
9875 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9876 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9877 }
9878 #ifdef SCTP_AUDITING_ENABLED
9879 sctp_auditing(21, inp, stcb, NULL);
9880 #endif
9881 } else {
9882 /* None will fit */
9883 return (1);
9884 }
9885 if (asoc->sent_queue_retran_cnt <= 0) {
9886 /* all done we have no more to retran */
9887 asoc->sent_queue_retran_cnt = 0;
9888 break;
9889 }
9890 if (one_chunk) {
9891 /* No more room in rwnd */
9892 return (1);
9893 }
9894 /* stop the for loop here. we sent out a packet */
9895 break;
9896 }
9897 return (0);
9898 }
9899
9900 static void
9901 sctp_timer_validation(struct sctp_inpcb *inp,
9902 struct sctp_tcb *stcb,
9903 struct sctp_association *asoc)
9904 {
9905 struct sctp_nets *net;
9906
9907 /* Validate that a timer is running somewhere */
9908 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9909 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9910 /* Here is a timer */
9911 return;
9912 }
9913 }
9914 SCTP_TCB_LOCK_ASSERT(stcb);
9915 /* Gak, we did not have a timer somewhere */
9916 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9917 if (asoc->alternate) {
9918 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9919 } else {
9920 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9921 }
9922 return;
9923 }
9924
9925 void
9926 sctp_chunk_output(struct sctp_inpcb *inp,
9927 struct sctp_tcb *stcb,
9928 int from_where,
9929 int so_locked
9930 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9931 SCTP_UNUSED
9932 #endif
9933 )
9934 {
9935 /*-
9936 * Ok this is the generic chunk service queue. we must do the
9937 * following:
9938 * - See if there are retransmits pending, if so we must
9939 * do these first.
9940 * - Service the stream queue that is next, moving any
9941 * message (note I must get a complete message i.e.
9942 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9943 * TSN's
9944 * - Check to see if the cwnd/rwnd allows any output, if so we
9945 * go ahead and fomulate and send the low level chunks. Making sure
9946 * to combine any control in the control chunk queue also.
9947 */
9948 struct sctp_association *asoc;
9949 struct sctp_nets *net;
9950 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9951 unsigned int burst_cnt = 0;
9952 struct timeval now;
9953 int now_filled = 0;
9954 int nagle_on;
9955 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9956 int un_sent = 0;
9957 int fr_done;
9958 unsigned int tot_frs = 0;
9959
9960 asoc = &stcb->asoc;
9961 do_it_again:
9962 /* The Nagle algorithm is only applied when handling a send call. */
9963 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9964 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9965 nagle_on = 0;
9966 } else {
9967 nagle_on = 1;
9968 }
9969 } else {
9970 nagle_on = 0;
9971 }
9972 SCTP_TCB_LOCK_ASSERT(stcb);
9973
9974 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9975
9976 if ((un_sent <= 0) &&
9977 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9978 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9979 (asoc->sent_queue_retran_cnt == 0) &&
9980 (asoc->trigger_reset == 0)) {
9981 /* Nothing to do unless there is something to be sent left */
9982 return;
9983 }
9984 /*
9985 * Do we have something to send, data or control AND a sack timer
9986 * running, if so piggy-back the sack.
9987 */
9988 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9989 sctp_send_sack(stcb, so_locked);
9990 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9991 }
9992 while (asoc->sent_queue_retran_cnt) {
9993 /*-
9994 * Ok, it is retransmission time only, we send out only ONE
9995 * packet with a single call off to the retran code.
9996 */
9997 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9998 /*-
9999 * Special hook for handling cookiess discarded
10000 * by peer that carried data. Send cookie-ack only
10001 * and then the next call with get the retran's.
10002 */
10003 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10004 from_where,
10005 &now, &now_filled, frag_point, so_locked);
10006 return;
10007 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10008 /* if its not from a HB then do it */
10009 fr_done = 0;
10010 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10011 if (fr_done) {
10012 tot_frs++;
10013 }
10014 } else {
10015 /*
10016 * its from any other place, we don't allow retran
10017 * output (only control)
10018 */
10019 ret = 1;
10020 }
10021 if (ret > 0) {
10022 /* Can't send anymore */
10023 /*-
10024 * now lets push out control by calling med-level
10025 * output once. this assures that we WILL send HB's
10026 * if queued too.
10027 */
10028 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10029 from_where,
10030 &now, &now_filled, frag_point, so_locked);
10031 #ifdef SCTP_AUDITING_ENABLED
10032 sctp_auditing(8, inp, stcb, NULL);
10033 #endif
10034 sctp_timer_validation(inp, stcb, asoc);
10035 return;
10036 }
10037 if (ret < 0) {
10038 /*-
10039 * The count was off.. retran is not happening so do
10040 * the normal retransmission.
10041 */
10042 #ifdef SCTP_AUDITING_ENABLED
10043 sctp_auditing(9, inp, stcb, NULL);
10044 #endif
10045 if (ret == SCTP_RETRAN_EXIT) {
10046 return;
10047 }
10048 break;
10049 }
10050 if (from_where == SCTP_OUTPUT_FROM_T3) {
10051 /* Only one transmission allowed out of a timeout */
10052 #ifdef SCTP_AUDITING_ENABLED
10053 sctp_auditing(10, inp, stcb, NULL);
10054 #endif
10055 /* Push out any control */
10056 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10057 &now, &now_filled, frag_point, so_locked);
10058 return;
10059 }
10060 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10061 /* Hit FR burst limit */
10062 return;
10063 }
10064 if ((num_out == 0) && (ret == 0)) {
10065 /* No more retrans to send */
10066 break;
10067 }
10068 }
10069 #ifdef SCTP_AUDITING_ENABLED
10070 sctp_auditing(12, inp, stcb, NULL);
10071 #endif
10072 /* Check for bad destinations, if they exist move chunks around. */
10073 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10074 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10075 /*-
10076 * if possible move things off of this address we
10077 * still may send below due to the dormant state but
10078 * we try to find an alternate address to send to
10079 * and if we have one we move all queued data on the
10080 * out wheel to this alternate address.
10081 */
10082 if (net->ref_count > 1)
10083 sctp_move_chunks_from_net(stcb, net);
10084 } else {
10085 /*-
10086 * if ((asoc->sat_network) || (net->addr_is_local))
10087 * { burst_limit = asoc->max_burst *
10088 * SCTP_SAT_NETWORK_BURST_INCR; }
10089 */
10090 if (asoc->max_burst > 0) {
10091 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10092 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10093 /*
10094 * JRS - Use the congestion
10095 * control given in the
10096 * congestion control module
10097 */
10098 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10099 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10100 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10101 }
10102 SCTP_STAT_INCR(sctps_maxburstqueued);
10103 }
10104 net->fast_retran_ip = 0;
10105 } else {
10106 if (net->flight_size == 0) {
10107 /*
10108 * Should be decaying the
10109 * cwnd here
10110 */
10111 ;
10112 }
10113 }
10114 }
10115 }
10116
10117 }
10118 burst_cnt = 0;
10119 do {
10120 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10121 &reason_code, 0, from_where,
10122 &now, &now_filled, frag_point, so_locked);
10123 if (error) {
10124 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10125 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10126 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10127 }
10128 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10129 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10130 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10131 }
10132 break;
10133 }
10134 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10135
10136 tot_out += num_out;
10137 burst_cnt++;
10138 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10139 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10140 if (num_out == 0) {
10141 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10142 }
10143 }
10144 if (nagle_on) {
10145 /*
10146 * When the Nagle algorithm is used, look at how
10147 * much is unsent, then if its smaller than an MTU
10148 * and we have data in flight we stop, except if we
10149 * are handling a fragmented user message.
10150 */
10151 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10152 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10153 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10154 (stcb->asoc.total_flight > 0) &&
10155 ((stcb->asoc.locked_on_sending == NULL) ||
10156 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10157 break;
10158 }
10159 }
10160 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10161 TAILQ_EMPTY(&asoc->send_queue) &&
10162 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10163 /* Nothing left to send */
10164 break;
10165 }
10166 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10167 /* Nothing left to send */
10168 break;
10169 }
10170 } while (num_out &&
10171 ((asoc->max_burst == 0) ||
10172 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10173 (burst_cnt < asoc->max_burst)));
10174
10175 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10176 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10177 SCTP_STAT_INCR(sctps_maxburstqueued);
10178 asoc->burst_limit_applied = 1;
10179 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10180 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10181 }
10182 } else {
10183 asoc->burst_limit_applied = 0;
10184 }
10185 }
10186 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10187 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10188 }
10189 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10190 tot_out);
10191
10192 /*-
10193 * Now we need to clean up the control chunk chain if a ECNE is on
10194 * it. It must be marked as UNSENT again so next call will continue
10195 * to send it until such time that we get a CWR, to remove it.
10196 */
10197 if (stcb->asoc.ecn_echo_cnt_onq)
10198 sctp_fix_ecn_echo(asoc);
10199
10200 if (stcb->asoc.trigger_reset) {
10201 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10202 goto do_it_again;
10203 }
10204 }
10205 return;
10206 }
10207
10208
10209 int
10210 sctp_output(
10211 struct sctp_inpcb *inp,
10212 struct mbuf *m,
10213 struct sockaddr *addr,
10214 struct mbuf *control,
10215 struct thread *p,
10216 int flags)
10217 {
10218 if (inp == NULL) {
10219 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10220 return (EINVAL);
10221 }
10222 if (inp->sctp_socket == NULL) {
10223 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10224 return (EINVAL);
10225 }
10226 return (sctp_sosend(inp->sctp_socket,
10227 addr,
10228 (struct uio *)NULL,
10229 m,
10230 control,
10231 flags, p
10232 ));
10233 }
10234
10235 void
10236 send_forward_tsn(struct sctp_tcb *stcb,
10237 struct sctp_association *asoc)
10238 {
10239 struct sctp_tmit_chunk *chk;
10240 struct sctp_forward_tsn_chunk *fwdtsn;
10241 uint32_t advance_peer_ack_point;
10242
10243 SCTP_TCB_LOCK_ASSERT(stcb);
10244 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10245 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10246 /* mark it to unsent */
10247 chk->sent = SCTP_DATAGRAM_UNSENT;
10248 chk->snd_count = 0;
10249 /* Do we correct its output location? */
10250 if (chk->whoTo) {
10251 sctp_free_remote_addr(chk->whoTo);
10252 chk->whoTo = NULL;
10253 }
10254 goto sctp_fill_in_rest;
10255 }
10256 }
10257 /* Ok if we reach here we must build one */
10258 sctp_alloc_a_chunk(stcb, chk);
10259 if (chk == NULL) {
10260 return;
10261 }
10262 asoc->fwd_tsn_cnt++;
10263 chk->copy_by_ref = 0;
10264 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10265 chk->rec.chunk_id.can_take_data = 0;
10266 chk->flags = 0;
10267 chk->asoc = asoc;
10268 chk->whoTo = NULL;
10269 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10270 if (chk->data == NULL) {
10271 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10272 return;
10273 }
10274 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10275 chk->sent = SCTP_DATAGRAM_UNSENT;
10276 chk->snd_count = 0;
10277 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10278 asoc->ctrl_queue_cnt++;
10279 sctp_fill_in_rest:
10280 /*-
10281 * Here we go through and fill out the part that deals with
10282 * stream/seq of the ones we skip.
10283 */
10284 SCTP_BUF_LEN(chk->data) = 0;
10285 {
10286 struct sctp_tmit_chunk *at, *tp1, *last;
10287 struct sctp_strseq *strseq;
10288 unsigned int cnt_of_space, i, ovh;
10289 unsigned int space_needed;
10290 unsigned int cnt_of_skipped = 0;
10291
10292 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10293 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10294 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10295 /* no more to look at */
10296 break;
10297 }
10298 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10299 /* We don't report these */
10300 continue;
10301 }
10302 cnt_of_skipped++;
10303 }
10304 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10305 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10306
10307 cnt_of_space = M_TRAILINGSPACE(chk->data);
10308
10309 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10310 ovh = SCTP_MIN_OVERHEAD;
10311 } else {
10312 ovh = SCTP_MIN_V4_OVERHEAD;
10313 }
10314 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10315 /* trim to a mtu size */
10316 cnt_of_space = asoc->smallest_mtu - ovh;
10317 }
10318 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10319 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10320 0xff, 0, cnt_of_skipped,
10321 asoc->advanced_peer_ack_point);
10322
10323 }
10324 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10325 if (cnt_of_space < space_needed) {
10326 /*-
10327 * ok we must trim down the chunk by lowering the
10328 * advance peer ack point.
10329 */
10330 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10331 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10332 0xff, 0xff, cnt_of_space,
10333 space_needed);
10334 }
10335 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10336 cnt_of_skipped /= sizeof(struct sctp_strseq);
10337 /*-
10338 * Go through and find the TSN that will be the one
10339 * we report.
10340 */
10341 at = TAILQ_FIRST(&asoc->sent_queue);
10342 if (at != NULL) {
10343 for (i = 0; i < cnt_of_skipped; i++) {
10344 tp1 = TAILQ_NEXT(at, sctp_next);
10345 if (tp1 == NULL) {
10346 break;
10347 }
10348 at = tp1;
10349 }
10350 }
10351 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10352 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10353 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10354 asoc->advanced_peer_ack_point);
10355 }
10356 last = at;
10357 /*-
10358 * last now points to last one I can report, update
10359 * peer ack point
10360 */
10361 if (last)
10362 advance_peer_ack_point = last->rec.data.TSN_seq;
10363 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10364 cnt_of_skipped * sizeof(struct sctp_strseq);
10365 }
10366 chk->send_size = space_needed;
10367 /* Setup the chunk */
10368 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10369 fwdtsn->ch.chunk_length = htons(chk->send_size);
10370 fwdtsn->ch.chunk_flags = 0;
10371 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10372 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10373 SCTP_BUF_LEN(chk->data) = chk->send_size;
10374 fwdtsn++;
10375 /*-
10376 * Move pointer to after the fwdtsn and transfer to the
10377 * strseq pointer.
10378 */
10379 strseq = (struct sctp_strseq *)fwdtsn;
10380 /*-
10381 * Now populate the strseq list. This is done blindly
10382 * without pulling out duplicate stream info. This is
10383 * inefficent but won't harm the process since the peer will
10384 * look at these in sequence and will thus release anything.
10385 * It could mean we exceed the PMTU and chop off some that
10386 * we could have included.. but this is unlikely (aka 1432/4
10387 * would mean 300+ stream seq's would have to be reported in
10388 * one FWD-TSN. With a bit of work we can later FIX this to
10389 * optimize and pull out duplcates.. but it does add more
10390 * overhead. So for now... not!
10391 */
10392 at = TAILQ_FIRST(&asoc->sent_queue);
10393 for (i = 0; i < cnt_of_skipped; i++) {
10394 tp1 = TAILQ_NEXT(at, sctp_next);
10395 if (tp1 == NULL)
10396 break;
10397 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10398 /* We don't report these */
10399 i--;
10400 at = tp1;
10401 continue;
10402 }
10403 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10404 at->rec.data.fwd_tsn_cnt = 0;
10405 }
10406 strseq->stream = ntohs(at->rec.data.stream_number);
10407 strseq->sequence = ntohs(at->rec.data.stream_seq);
10408 strseq++;
10409 at = tp1;
10410 }
10411 }
10412 return;
10413 }
10414
10415 void
10416 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10417 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10418 SCTP_UNUSED
10419 #endif
10420 )
10421 {
10422 /*-
10423 * Queue up a SACK or NR-SACK in the control queue.
10424 * We must first check to see if a SACK or NR-SACK is
10425 * somehow on the control queue.
10426 * If so, we will take and and remove the old one.
10427 */
10428 struct sctp_association *asoc;
10429 struct sctp_tmit_chunk *chk, *a_chk;
10430 struct sctp_sack_chunk *sack;
10431 struct sctp_nr_sack_chunk *nr_sack;
10432 struct sctp_gap_ack_block *gap_descriptor;
10433 struct sack_track *selector;
10434 int mergeable = 0;
10435 int offset;
10436 caddr_t limit;
10437 uint32_t *dup;
10438 int limit_reached = 0;
10439 unsigned int i, siz, j;
10440 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10441 int num_dups = 0;
10442 int space_req;
10443 uint32_t highest_tsn;
10444 uint8_t flags;
10445 uint8_t type;
10446 uint8_t tsn_map;
10447
10448 if (stcb->asoc.nrsack_supported == 1) {
10449 type = SCTP_NR_SELECTIVE_ACK;
10450 } else {
10451 type = SCTP_SELECTIVE_ACK;
10452 }
10453 a_chk = NULL;
10454 asoc = &stcb->asoc;
10455 SCTP_TCB_LOCK_ASSERT(stcb);
10456 if (asoc->last_data_chunk_from == NULL) {
10457 /* Hmm we never received anything */
10458 return;
10459 }
10460 sctp_slide_mapping_arrays(stcb);
10461 sctp_set_rwnd(stcb, asoc);
10462 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10463 if (chk->rec.chunk_id.id == type) {
10464 /* Hmm, found a sack already on queue, remove it */
10465 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10466 asoc->ctrl_queue_cnt--;
10467 a_chk = chk;
10468 if (a_chk->data) {
10469 sctp_m_freem(a_chk->data);
10470 a_chk->data = NULL;
10471 }
10472 if (a_chk->whoTo) {
10473 sctp_free_remote_addr(a_chk->whoTo);
10474 a_chk->whoTo = NULL;
10475 }
10476 break;
10477 }
10478 }
10479 if (a_chk == NULL) {
10480 sctp_alloc_a_chunk(stcb, a_chk);
10481 if (a_chk == NULL) {
10482 /* No memory so we drop the idea, and set a timer */
10483 if (stcb->asoc.delayed_ack) {
10484 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10485 stcb->sctp_ep, stcb, NULL,
10486 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10487 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10488 stcb->sctp_ep, stcb, NULL);
10489 } else {
10490 stcb->asoc.send_sack = 1;
10491 }
10492 return;
10493 }
10494 a_chk->copy_by_ref = 0;
10495 a_chk->rec.chunk_id.id = type;
10496 a_chk->rec.chunk_id.can_take_data = 1;
10497 }
10498 /* Clear our pkt counts */
10499 asoc->data_pkts_seen = 0;
10500
10501 a_chk->flags = 0;
10502 a_chk->asoc = asoc;
10503 a_chk->snd_count = 0;
10504 a_chk->send_size = 0; /* fill in later */
10505 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10506 a_chk->whoTo = NULL;
10507
10508 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10509 /*-
10510 * Ok, the destination for the SACK is unreachable, lets see if
10511 * we can select an alternate to asoc->last_data_chunk_from
10512 */
10513 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10514 if (a_chk->whoTo == NULL) {
10515 /* Nope, no alternate */
10516 a_chk->whoTo = asoc->last_data_chunk_from;
10517 }
10518 } else {
10519 a_chk->whoTo = asoc->last_data_chunk_from;
10520 }
10521 if (a_chk->whoTo) {
10522 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10523 }
10524 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10525 highest_tsn = asoc->highest_tsn_inside_map;
10526 } else {
10527 highest_tsn = asoc->highest_tsn_inside_nr_map;
10528 }
10529 if (highest_tsn == asoc->cumulative_tsn) {
10530 /* no gaps */
10531 if (type == SCTP_SELECTIVE_ACK) {
10532 space_req = sizeof(struct sctp_sack_chunk);
10533 } else {
10534 space_req = sizeof(struct sctp_nr_sack_chunk);
10535 }
10536 } else {
10537 /* gaps get a cluster */
10538 space_req = MCLBYTES;
10539 }
10540 /* Ok now lets formulate a MBUF with our sack */
10541 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10542 if ((a_chk->data == NULL) ||
10543 (a_chk->whoTo == NULL)) {
10544 /* rats, no mbuf memory */
10545 if (a_chk->data) {
10546 /* was a problem with the destination */
10547 sctp_m_freem(a_chk->data);
10548 a_chk->data = NULL;
10549 }
10550 sctp_free_a_chunk(stcb, a_chk, so_locked);
10551 /* sa_ignore NO_NULL_CHK */
10552 if (stcb->asoc.delayed_ack) {
10553 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10554 stcb->sctp_ep, stcb, NULL,
10555 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10556 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10557 stcb->sctp_ep, stcb, NULL);
10558 } else {
10559 stcb->asoc.send_sack = 1;
10560 }
10561 return;
10562 }
10563 /* ok, lets go through and fill it in */
10564 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10565 space = M_TRAILINGSPACE(a_chk->data);
10566 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10567 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10568 }
10569 limit = mtod(a_chk->data, caddr_t);
10570 limit += space;
10571
10572 flags = 0;
10573
10574 if ((asoc->sctp_cmt_on_off > 0) &&
10575 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10576 /*-
10577 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10578 * received, then set high bit to 1, else 0. Reset
10579 * pkts_rcvd.
10580 */
10581 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10582 asoc->cmt_dac_pkts_rcvd = 0;
10583 }
10584 #ifdef SCTP_ASOCLOG_OF_TSNS
10585 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10586 stcb->asoc.cumack_log_atsnt++;
10587 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10588 stcb->asoc.cumack_log_atsnt = 0;
10589 }
10590 #endif
10591 /* reset the readers interpretation */
10592 stcb->freed_by_sorcv_sincelast = 0;
10593
10594 if (type == SCTP_SELECTIVE_ACK) {
10595 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10596 nr_sack = NULL;
10597 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10598 if (highest_tsn > asoc->mapping_array_base_tsn) {
10599 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10600 } else {
10601 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10602 }
10603 } else {
10604 sack = NULL;
10605 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10606 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10607 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10608 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10609 } else {
10610 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10611 }
10612 }
10613
10614 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10615 offset = 1;
10616 } else {
10617 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10618 }
10619 if (((type == SCTP_SELECTIVE_ACK) &&
10620 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10621 ((type == SCTP_NR_SELECTIVE_ACK) &&
10622 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10623 /* we have a gap .. maybe */
10624 for (i = 0; i < siz; i++) {
10625 tsn_map = asoc->mapping_array[i];
10626 if (type == SCTP_SELECTIVE_ACK) {
10627 tsn_map |= asoc->nr_mapping_array[i];
10628 }
10629 if (i == 0) {
10630 /*
10631 * Clear all bits corresponding to TSNs
10632 * smaller or equal to the cumulative TSN.
10633 */
10634 tsn_map &= (~0U << (1 - offset));
10635 }
10636 selector = &sack_array[tsn_map];
10637 if (mergeable && selector->right_edge) {
10638 /*
10639 * Backup, left and right edges were ok to
10640 * merge.
10641 */
10642 num_gap_blocks--;
10643 gap_descriptor--;
10644 }
10645 if (selector->num_entries == 0)
10646 mergeable = 0;
10647 else {
10648 for (j = 0; j < selector->num_entries; j++) {
10649 if (mergeable && selector->right_edge) {
10650 /*
10651 * do a merge by NOT setting
10652 * the left side
10653 */
10654 mergeable = 0;
10655 } else {
10656 /*
10657 * no merge, set the left
10658 * side
10659 */
10660 mergeable = 0;
10661 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10662 }
10663 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10664 num_gap_blocks++;
10665 gap_descriptor++;
10666 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10667 /* no more room */
10668 limit_reached = 1;
10669 break;
10670 }
10671 }
10672 if (selector->left_edge) {
10673 mergeable = 1;
10674 }
10675 }
10676 if (limit_reached) {
10677 /* Reached the limit stop */
10678 break;
10679 }
10680 offset += 8;
10681 }
10682 }
10683 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10684 (limit_reached == 0)) {
10685
10686 mergeable = 0;
10687
10688 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10689 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10690 } else {
10691 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10692 }
10693
10694 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10695 offset = 1;
10696 } else {
10697 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10698 }
10699 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10700 /* we have a gap .. maybe */
10701 for (i = 0; i < siz; i++) {
10702 tsn_map = asoc->nr_mapping_array[i];
10703 if (i == 0) {
10704 /*
10705 * Clear all bits corresponding to
10706 * TSNs smaller or equal to the
10707 * cumulative TSN.
10708 */
10709 tsn_map &= (~0U << (1 - offset));
10710 }
10711 selector = &sack_array[tsn_map];
10712 if (mergeable && selector->right_edge) {
10713 /*
10714 * Backup, left and right edges were
10715 * ok to merge.
10716 */
10717 num_nr_gap_blocks--;
10718 gap_descriptor--;
10719 }
10720 if (selector->num_entries == 0)
10721 mergeable = 0;
10722 else {
10723 for (j = 0; j < selector->num_entries; j++) {
10724 if (mergeable && selector->right_edge) {
10725 /*
10726 * do a merge by NOT
10727 * setting the left
10728 * side
10729 */
10730 mergeable = 0;
10731 } else {
10732 /*
10733 * no merge, set the
10734 * left side
10735 */
10736 mergeable = 0;
10737 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10738 }
10739 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10740 num_nr_gap_blocks++;
10741 gap_descriptor++;
10742 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10743 /* no more room */
10744 limit_reached = 1;
10745 break;
10746 }
10747 }
10748 if (selector->left_edge) {
10749 mergeable = 1;
10750 }
10751 }
10752 if (limit_reached) {
10753 /* Reached the limit stop */
10754 break;
10755 }
10756 offset += 8;
10757 }
10758 }
10759 }
10760 /* now we must add any dups we are going to report. */
10761 if ((limit_reached == 0) && (asoc->numduptsns)) {
10762 dup = (uint32_t *) gap_descriptor;
10763 for (i = 0; i < asoc->numduptsns; i++) {
10764 *dup = htonl(asoc->dup_tsns[i]);
10765 dup++;
10766 num_dups++;
10767 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10768 /* no more room */
10769 break;
10770 }
10771 }
10772 asoc->numduptsns = 0;
10773 }
10774 /*
10775 * now that the chunk is prepared queue it to the control chunk
10776 * queue.
10777 */
10778 if (type == SCTP_SELECTIVE_ACK) {
10779 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10780 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10781 num_dups * sizeof(int32_t);
10782 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10783 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10784 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10785 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10786 sack->sack.num_dup_tsns = htons(num_dups);
10787 sack->ch.chunk_type = type;
10788 sack->ch.chunk_flags = flags;
10789 sack->ch.chunk_length = htons(a_chk->send_size);
10790 } else {
10791 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10792 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10793 num_dups * sizeof(int32_t);
10794 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10795 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10796 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10797 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10798 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10799 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10800 nr_sack->nr_sack.reserved = 0;
10801 nr_sack->ch.chunk_type = type;
10802 nr_sack->ch.chunk_flags = flags;
10803 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10804 }
10805 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10806 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10807 asoc->ctrl_queue_cnt++;
10808 asoc->send_sack = 0;
10809 SCTP_STAT_INCR(sctps_sendsacks);
10810 return;
10811 }
10812
10813 void
10814 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10815 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10816 SCTP_UNUSED
10817 #endif
10818 )
10819 {
10820 struct mbuf *m_abort, *m, *m_last;
10821 struct mbuf *m_out, *m_end = NULL;
10822 struct sctp_abort_chunk *abort;
10823 struct sctp_auth_chunk *auth = NULL;
10824 struct sctp_nets *net;
10825 uint32_t vtag;
10826 uint32_t auth_offset = 0;
10827 uint16_t cause_len, chunk_len, padding_len;
10828
10829 SCTP_TCB_LOCK_ASSERT(stcb);
10830 /*-
10831 * Add an AUTH chunk, if chunk requires it and save the offset into
10832 * the chain for AUTH
10833 */
10834 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10835 stcb->asoc.peer_auth_chunks)) {
10836 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10837 stcb, SCTP_ABORT_ASSOCIATION);
10838 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10839 } else {
10840 m_out = NULL;
10841 }
10842 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10843 if (m_abort == NULL) {
10844 if (m_out) {
10845 sctp_m_freem(m_out);
10846 }
10847 if (operr) {
10848 sctp_m_freem(operr);
10849 }
10850 return;
10851 }
10852 /* link in any error */
10853 SCTP_BUF_NEXT(m_abort) = operr;
10854 cause_len = 0;
10855 m_last = NULL;
10856 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10857 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10858 if (SCTP_BUF_NEXT(m) == NULL) {
10859 m_last = m;
10860 }
10861 }
10862 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10863 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10864 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10865 if (m_out == NULL) {
10866 /* NO Auth chunk prepended, so reserve space in front */
10867 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10868 m_out = m_abort;
10869 } else {
10870 /* Put AUTH chunk at the front of the chain */
10871 SCTP_BUF_NEXT(m_end) = m_abort;
10872 }
10873 if (stcb->asoc.alternate) {
10874 net = stcb->asoc.alternate;
10875 } else {
10876 net = stcb->asoc.primary_destination;
10877 }
10878 /* Fill in the ABORT chunk header. */
10879 abort = mtod(m_abort, struct sctp_abort_chunk *);
10880 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10881 if (stcb->asoc.peer_vtag == 0) {
10882 /* This happens iff the assoc is in COOKIE-WAIT state. */
10883 vtag = stcb->asoc.my_vtag;
10884 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10885 } else {
10886 vtag = stcb->asoc.peer_vtag;
10887 abort->ch.chunk_flags = 0;
10888 }
10889 abort->ch.chunk_length = htons(chunk_len);
10890 /* Add padding, if necessary. */
10891 if (padding_len > 0) {
10892 if ((m_last == NULL) ||
10893 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10894 sctp_m_freem(m_out);
10895 return;
10896 }
10897 }
10898 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10899 (struct sockaddr *)&net->ro._l_addr,
10900 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10901 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10902 stcb->asoc.primary_destination->port, NULL,
10903 0, 0,
10904 so_locked);
10905 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10906 }
10907
10908 void
10909 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10910 struct sctp_nets *net,
10911 int reflect_vtag)
10912 {
10913 /* formulate and SEND a SHUTDOWN-COMPLETE */
10914 struct mbuf *m_shutdown_comp;
10915 struct sctp_shutdown_complete_chunk *shutdown_complete;
10916 uint32_t vtag;
10917 uint8_t flags;
10918
10919 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10920 if (m_shutdown_comp == NULL) {
10921 /* no mbuf's */
10922 return;
10923 }
10924 if (reflect_vtag) {
10925 flags = SCTP_HAD_NO_TCB;
10926 vtag = stcb->asoc.my_vtag;
10927 } else {
10928 flags = 0;
10929 vtag = stcb->asoc.peer_vtag;
10930 }
10931 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10932 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10933 shutdown_complete->ch.chunk_flags = flags;
10934 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10935 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10936 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10937 (struct sockaddr *)&net->ro._l_addr,
10938 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10939 stcb->sctp_ep->sctp_lport, stcb->rport,
10940 htonl(vtag),
10941 net->port, NULL,
10942 0, 0,
10943 SCTP_SO_NOT_LOCKED);
10944 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10945 return;
10946 }
10947
10948 static void
10949 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10950 struct sctphdr *sh, uint32_t vtag,
10951 uint8_t type, struct mbuf *cause,
10952 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
10953 uint32_t vrf_id, uint16_t port)
10954 {
10955 struct mbuf *o_pak;
10956 struct mbuf *mout;
10957 struct sctphdr *shout;
10958 struct sctp_chunkhdr *ch;
10959
10960 #if defined(INET) || defined(INET6)
10961 struct udphdr *udp;
10962 int ret;
10963
10964 #endif
10965 int len, cause_len, padding_len;
10966
10967 #ifdef INET
10968 struct sockaddr_in *src_sin, *dst_sin;
10969 struct ip *ip;
10970
10971 #endif
10972 #ifdef INET6
10973 struct sockaddr_in6 *src_sin6, *dst_sin6;
10974 struct ip6_hdr *ip6;
10975
10976 #endif
10977
10978 /* Compute the length of the cause and add final padding. */
10979 cause_len = 0;
10980 if (cause != NULL) {
10981 struct mbuf *m_at, *m_last = NULL;
10982
10983 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10984 if (SCTP_BUF_NEXT(m_at) == NULL)
10985 m_last = m_at;
10986 cause_len += SCTP_BUF_LEN(m_at);
10987 }
10988 padding_len = cause_len % 4;
10989 if (padding_len != 0) {
10990 padding_len = 4 - padding_len;
10991 }
10992 if (padding_len != 0) {
10993 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
10994 sctp_m_freem(cause);
10995 return;
10996 }
10997 }
10998 } else {
10999 padding_len = 0;
11000 }
11001 /* Get an mbuf for the header. */
11002 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11003 switch (dst->sa_family) {
11004 #ifdef INET
11005 case AF_INET:
11006 len += sizeof(struct ip);
11007 break;
11008 #endif
11009 #ifdef INET6
11010 case AF_INET6:
11011 len += sizeof(struct ip6_hdr);
11012 break;
11013 #endif
11014 default:
11015 break;
11016 }
11017 #if defined(INET) || defined(INET6)
11018 if (port) {
11019 len += sizeof(struct udphdr);
11020 }
11021 #endif
11022 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11023 if (mout == NULL) {
11024 if (cause) {
11025 sctp_m_freem(cause);
11026 }
11027 return;
11028 }
11029 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11030 SCTP_BUF_LEN(mout) = len;
11031 SCTP_BUF_NEXT(mout) = cause;
11032 M_SETFIB(mout, fibnum);
11033 mout->m_pkthdr.flowid = mflowid;
11034 M_HASHTYPE_SET(mout, mflowtype);
11035 #ifdef INET
11036 ip = NULL;
11037 #endif
11038 #ifdef INET6
11039 ip6 = NULL;
11040 #endif
11041 switch (dst->sa_family) {
11042 #ifdef INET
11043 case AF_INET:
11044 src_sin = (struct sockaddr_in *)src;
11045 dst_sin = (struct sockaddr_in *)dst;
11046 ip = mtod(mout, struct ip *);
11047 ip->ip_v = IPVERSION;
11048 ip->ip_hl = (sizeof(struct ip) >> 2);
11049 ip->ip_tos = 0;
11050 ip->ip_id = ip_newid();
11051 ip->ip_off = 0;
11052 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11053 if (port) {
11054 ip->ip_p = IPPROTO_UDP;
11055 } else {
11056 ip->ip_p = IPPROTO_SCTP;
11057 }
11058 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11059 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11060 ip->ip_sum = 0;
11061 len = sizeof(struct ip);
11062 shout = (struct sctphdr *)((caddr_t)ip + len);
11063 break;
11064 #endif
11065 #ifdef INET6
11066 case AF_INET6:
11067 src_sin6 = (struct sockaddr_in6 *)src;
11068 dst_sin6 = (struct sockaddr_in6 *)dst;
11069 ip6 = mtod(mout, struct ip6_hdr *);
11070 ip6->ip6_flow = htonl(0x60000000);
11071 if (V_ip6_auto_flowlabel) {
11072 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11073 }
11074 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11075 if (port) {
11076 ip6->ip6_nxt = IPPROTO_UDP;
11077 } else {
11078 ip6->ip6_nxt = IPPROTO_SCTP;
11079 }
11080 ip6->ip6_src = dst_sin6->sin6_addr;
11081 ip6->ip6_dst = src_sin6->sin6_addr;
11082 len = sizeof(struct ip6_hdr);
11083 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11084 break;
11085 #endif
11086 default:
11087 len = 0;
11088 shout = mtod(mout, struct sctphdr *);
11089 break;
11090 }
11091 #if defined(INET) || defined(INET6)
11092 if (port) {
11093 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11094 sctp_m_freem(mout);
11095 return;
11096 }
11097 udp = (struct udphdr *)shout;
11098 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11099 udp->uh_dport = port;
11100 udp->uh_sum = 0;
11101 udp->uh_ulen = htons(sizeof(struct udphdr) +
11102 sizeof(struct sctphdr) +
11103 sizeof(struct sctp_chunkhdr) +
11104 cause_len + padding_len);
11105 len += sizeof(struct udphdr);
11106 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11107 } else {
11108 udp = NULL;
11109 }
11110 #endif
11111 shout->src_port = sh->dest_port;
11112 shout->dest_port = sh->src_port;
11113 shout->checksum = 0;
11114 if (vtag) {
11115 shout->v_tag = htonl(vtag);
11116 } else {
11117 shout->v_tag = sh->v_tag;
11118 }
11119 len += sizeof(struct sctphdr);
11120 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11121 ch->chunk_type = type;
11122 if (vtag) {
11123 ch->chunk_flags = 0;
11124 } else {
11125 ch->chunk_flags = SCTP_HAD_NO_TCB;
11126 }
11127 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
11128 len += sizeof(struct sctp_chunkhdr);
11129 len += cause_len + padding_len;
11130
11131 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11132 sctp_m_freem(mout);
11133 return;
11134 }
11135 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11136 switch (dst->sa_family) {
11137 #ifdef INET
11138 case AF_INET:
11139 if (port) {
11140 if (V_udp_cksum) {
11141 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11142 } else {
11143 udp->uh_sum = 0;
11144 }
11145 }
11146 ip->ip_len = htons(len);
11147 if (port) {
11148 #if defined(SCTP_WITH_NO_CSUM)
11149 SCTP_STAT_INCR(sctps_sendnocrc);
11150 #else
11151 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11152 SCTP_STAT_INCR(sctps_sendswcrc);
11153 #endif
11154 if (V_udp_cksum) {
11155 SCTP_ENABLE_UDP_CSUM(o_pak);
11156 }
11157 } else {
11158 #if defined(SCTP_WITH_NO_CSUM)
11159 SCTP_STAT_INCR(sctps_sendnocrc);
11160 #else
11161 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11162 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11163 SCTP_STAT_INCR(sctps_sendhwcrc);
11164 #endif
11165 }
11166 #ifdef SCTP_PACKET_LOGGING
11167 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11168 sctp_packet_log(o_pak);
11169 }
11170 #endif
11171 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11172 break;
11173 #endif
11174 #ifdef INET6
11175 case AF_INET6:
11176 ip6->ip6_plen = len - sizeof(struct ip6_hdr);
11177 if (port) {
11178 #if defined(SCTP_WITH_NO_CSUM)
11179 SCTP_STAT_INCR(sctps_sendnocrc);
11180 #else
11181 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11182 SCTP_STAT_INCR(sctps_sendswcrc);
11183 #endif
11184 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11185 udp->uh_sum = 0xffff;
11186 }
11187 } else {
11188 #if defined(SCTP_WITH_NO_CSUM)
11189 SCTP_STAT_INCR(sctps_sendnocrc);
11190 #else
11191 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11192 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11193 SCTP_STAT_INCR(sctps_sendhwcrc);
11194 #endif
11195 }
11196 #ifdef SCTP_PACKET_LOGGING
11197 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11198 sctp_packet_log(o_pak);
11199 }
11200 #endif
11201 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11202 break;
11203 #endif
11204 default:
11205 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11206 dst->sa_family);
11207 sctp_m_freem(mout);
11208 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11209 return;
11210 }
11211 SCTP_STAT_INCR(sctps_sendpackets);
11212 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11213 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11214 return;
11215 }
11216
11217 void
11218 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11219 struct sctphdr *sh,
11220 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11221 uint32_t vrf_id, uint16_t port)
11222 {
11223 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11224 mflowtype, mflowid, fibnum,
11225 vrf_id, port);
11226 }
11227
11228 void
11229 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11230 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11231 SCTP_UNUSED
11232 #endif
11233 )
11234 {
11235 struct sctp_tmit_chunk *chk;
11236 struct sctp_heartbeat_chunk *hb;
11237 struct timeval now;
11238
11239 SCTP_TCB_LOCK_ASSERT(stcb);
11240 if (net == NULL) {
11241 return;
11242 }
11243 (void)SCTP_GETTIME_TIMEVAL(&now);
11244 switch (net->ro._l_addr.sa.sa_family) {
11245 #ifdef INET
11246 case AF_INET:
11247 break;
11248 #endif
11249 #ifdef INET6
11250 case AF_INET6:
11251 break;
11252 #endif
11253 default:
11254 return;
11255 }
11256 sctp_alloc_a_chunk(stcb, chk);
11257 if (chk == NULL) {
11258 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11259 return;
11260 }
11261 chk->copy_by_ref = 0;
11262 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11263 chk->rec.chunk_id.can_take_data = 1;
11264 chk->flags = 0;
11265 chk->asoc = &stcb->asoc;
11266 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11267
11268 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11269 if (chk->data == NULL) {
11270 sctp_free_a_chunk(stcb, chk, so_locked);
11271 return;
11272 }
11273 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11274 SCTP_BUF_LEN(chk->data) = chk->send_size;
11275 chk->sent = SCTP_DATAGRAM_UNSENT;
11276 chk->snd_count = 0;
11277 chk->whoTo = net;
11278 atomic_add_int(&chk->whoTo->ref_count, 1);
11279 /* Now we have a mbuf that we can fill in with the details */
11280 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11281 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11282 /* fill out chunk header */
11283 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11284 hb->ch.chunk_flags = 0;
11285 hb->ch.chunk_length = htons(chk->send_size);
11286 /* Fill out hb parameter */
11287 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11288 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11289 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11290 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11291 /* Did our user request this one, put it in */
11292 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
11293 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11294 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11295 /*
11296 * we only take from the entropy pool if the address is not
11297 * confirmed.
11298 */
11299 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11300 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11301 } else {
11302 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11303 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11304 }
11305 switch (net->ro._l_addr.sa.sa_family) {
11306 #ifdef INET
11307 case AF_INET:
11308 memcpy(hb->heartbeat.hb_info.address,
11309 &net->ro._l_addr.sin.sin_addr,
11310 sizeof(net->ro._l_addr.sin.sin_addr));
11311 break;
11312 #endif
11313 #ifdef INET6
11314 case AF_INET6:
11315 memcpy(hb->heartbeat.hb_info.address,
11316 &net->ro._l_addr.sin6.sin6_addr,
11317 sizeof(net->ro._l_addr.sin6.sin6_addr));
11318 break;
11319 #endif
11320 default:
11321 if (chk->data) {
11322 sctp_m_freem(chk->data);
11323 chk->data = NULL;
11324 }
11325 sctp_free_a_chunk(stcb, chk, so_locked);
11326 return;
11327 break;
11328 }
11329 net->hb_responded = 0;
11330 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11331 stcb->asoc.ctrl_queue_cnt++;
11332 SCTP_STAT_INCR(sctps_sendheartbeat);
11333 return;
11334 }
11335
11336 void
11337 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11338 uint32_t high_tsn)
11339 {
11340 struct sctp_association *asoc;
11341 struct sctp_ecne_chunk *ecne;
11342 struct sctp_tmit_chunk *chk;
11343
11344 if (net == NULL) {
11345 return;
11346 }
11347 asoc = &stcb->asoc;
11348 SCTP_TCB_LOCK_ASSERT(stcb);
11349 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11350 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11351 /* found a previous ECN_ECHO update it if needed */
11352 uint32_t cnt, ctsn;
11353
11354 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11355 ctsn = ntohl(ecne->tsn);
11356 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11357 ecne->tsn = htonl(high_tsn);
11358 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11359 }
11360 cnt = ntohl(ecne->num_pkts_since_cwr);
11361 cnt++;
11362 ecne->num_pkts_since_cwr = htonl(cnt);
11363 return;
11364 }
11365 }
11366 /* nope could not find one to update so we must build one */
11367 sctp_alloc_a_chunk(stcb, chk);
11368 if (chk == NULL) {
11369 return;
11370 }
11371 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11372 chk->copy_by_ref = 0;
11373 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11374 chk->rec.chunk_id.can_take_data = 0;
11375 chk->flags = 0;
11376 chk->asoc = &stcb->asoc;
11377 chk->send_size = sizeof(struct sctp_ecne_chunk);
11378 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11379 if (chk->data == NULL) {
11380 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11381 return;
11382 }
11383 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11384 SCTP_BUF_LEN(chk->data) = chk->send_size;
11385 chk->sent = SCTP_DATAGRAM_UNSENT;
11386 chk->snd_count = 0;
11387 chk->whoTo = net;
11388 atomic_add_int(&chk->whoTo->ref_count, 1);
11389
11390 stcb->asoc.ecn_echo_cnt_onq++;
11391 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11392 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11393 ecne->ch.chunk_flags = 0;
11394 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11395 ecne->tsn = htonl(high_tsn);
11396 ecne->num_pkts_since_cwr = htonl(1);
11397 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11398 asoc->ctrl_queue_cnt++;
11399 }
11400
11401 void
11402 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11403 struct mbuf *m, int len, int iphlen, int bad_crc)
11404 {
11405 struct sctp_association *asoc;
11406 struct sctp_pktdrop_chunk *drp;
11407 struct sctp_tmit_chunk *chk;
11408 uint8_t *datap;
11409 int was_trunc = 0;
11410 int fullsz = 0;
11411 long spc;
11412 int offset;
11413 struct sctp_chunkhdr *ch, chunk_buf;
11414 unsigned int chk_length;
11415
11416 if (!stcb) {
11417 return;
11418 }
11419 asoc = &stcb->asoc;
11420 SCTP_TCB_LOCK_ASSERT(stcb);
11421 if (asoc->pktdrop_supported == 0) {
11422 /*-
11423 * peer must declare support before I send one.
11424 */
11425 return;
11426 }
11427 if (stcb->sctp_socket == NULL) {
11428 return;
11429 }
11430 sctp_alloc_a_chunk(stcb, chk);
11431 if (chk == NULL) {
11432 return;
11433 }
11434 chk->copy_by_ref = 0;
11435 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11436 chk->rec.chunk_id.can_take_data = 1;
11437 chk->flags = 0;
11438 len -= iphlen;
11439 chk->send_size = len;
11440 /* Validate that we do not have an ABORT in here. */
11441 offset = iphlen + sizeof(struct sctphdr);
11442 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11443 sizeof(*ch), (uint8_t *) & chunk_buf);
11444 while (ch != NULL) {
11445 chk_length = ntohs(ch->chunk_length);
11446 if (chk_length < sizeof(*ch)) {
11447 /* break to abort land */
11448 break;
11449 }
11450 switch (ch->chunk_type) {
11451 case SCTP_PACKET_DROPPED:
11452 case SCTP_ABORT_ASSOCIATION:
11453 case SCTP_INITIATION_ACK:
11454 /**
11455 * We don't respond with an PKT-DROP to an ABORT
11456 * or PKT-DROP. We also do not respond to an
11457 * INIT-ACK, because we can't know if the initiation
11458 * tag is correct or not.
11459 */
11460 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11461 return;
11462 default:
11463 break;
11464 }
11465 offset += SCTP_SIZE32(chk_length);
11466 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11467 sizeof(*ch), (uint8_t *) & chunk_buf);
11468 }
11469
11470 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11471 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11472 /*
11473 * only send 1 mtu worth, trim off the excess on the end.
11474 */
11475 fullsz = len;
11476 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11477 was_trunc = 1;
11478 }
11479 chk->asoc = &stcb->asoc;
11480 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11481 if (chk->data == NULL) {
11482 jump_out:
11483 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11484 return;
11485 }
11486 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11487 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11488 if (drp == NULL) {
11489 sctp_m_freem(chk->data);
11490 chk->data = NULL;
11491 goto jump_out;
11492 }
11493 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11494 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11495 chk->book_size_scale = 0;
11496 if (was_trunc) {
11497 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11498 drp->trunc_len = htons(fullsz);
11499 /*
11500 * Len is already adjusted to size minus overhead above take
11501 * out the pkt_drop chunk itself from it.
11502 */
11503 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11504 len = chk->send_size;
11505 } else {
11506 /* no truncation needed */
11507 drp->ch.chunk_flags = 0;
11508 drp->trunc_len = htons(0);
11509 }
11510 if (bad_crc) {
11511 drp->ch.chunk_flags |= SCTP_BADCRC;
11512 }
11513 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11514 SCTP_BUF_LEN(chk->data) = chk->send_size;
11515 chk->sent = SCTP_DATAGRAM_UNSENT;
11516 chk->snd_count = 0;
11517 if (net) {
11518 /* we should hit here */
11519 chk->whoTo = net;
11520 atomic_add_int(&chk->whoTo->ref_count, 1);
11521 } else {
11522 chk->whoTo = NULL;
11523 }
11524 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11525 drp->ch.chunk_length = htons(chk->send_size);
11526 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11527 if (spc < 0) {
11528 spc = 0;
11529 }
11530 drp->bottle_bw = htonl(spc);
11531 if (asoc->my_rwnd) {
11532 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11533 asoc->size_on_all_streams +
11534 asoc->my_rwnd_control_len +
11535 stcb->sctp_socket->so_rcv.sb_cc);
11536 } else {
11537 /*-
11538 * If my rwnd is 0, possibly from mbuf depletion as well as
11539 * space used, tell the peer there is NO space aka onq == bw
11540 */
11541 drp->current_onq = htonl(spc);
11542 }
11543 drp->reserved = 0;
11544 datap = drp->data;
11545 m_copydata(m, iphlen, len, (caddr_t)datap);
11546 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11547 asoc->ctrl_queue_cnt++;
11548 }
11549
11550 void
11551 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11552 {
11553 struct sctp_association *asoc;
11554 struct sctp_cwr_chunk *cwr;
11555 struct sctp_tmit_chunk *chk;
11556
11557 SCTP_TCB_LOCK_ASSERT(stcb);
11558 if (net == NULL) {
11559 return;
11560 }
11561 asoc = &stcb->asoc;
11562 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11563 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11564 /*
11565 * found a previous CWR queued to same destination
11566 * update it if needed
11567 */
11568 uint32_t ctsn;
11569
11570 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11571 ctsn = ntohl(cwr->tsn);
11572 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11573 cwr->tsn = htonl(high_tsn);
11574 }
11575 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11576 /* Make sure override is carried */
11577 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11578 }
11579 return;
11580 }
11581 }
11582 sctp_alloc_a_chunk(stcb, chk);
11583 if (chk == NULL) {
11584 return;
11585 }
11586 chk->copy_by_ref = 0;
11587 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11588 chk->rec.chunk_id.can_take_data = 1;
11589 chk->flags = 0;
11590 chk->asoc = &stcb->asoc;
11591 chk->send_size = sizeof(struct sctp_cwr_chunk);
11592 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11593 if (chk->data == NULL) {
11594 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11595 return;
11596 }
11597 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11598 SCTP_BUF_LEN(chk->data) = chk->send_size;
11599 chk->sent = SCTP_DATAGRAM_UNSENT;
11600 chk->snd_count = 0;
11601 chk->whoTo = net;
11602 atomic_add_int(&chk->whoTo->ref_count, 1);
11603 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11604 cwr->ch.chunk_type = SCTP_ECN_CWR;
11605 cwr->ch.chunk_flags = override;
11606 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11607 cwr->tsn = htonl(high_tsn);
11608 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11609 asoc->ctrl_queue_cnt++;
11610 }
11611
11612 static int
11613 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11614 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11615 {
11616 uint16_t len, old_len, i;
11617 struct sctp_stream_reset_out_request *req_out;
11618 struct sctp_chunkhdr *ch;
11619 int at;
11620 int number_entries = 0;
11621
11622 ch = mtod(chk->data, struct sctp_chunkhdr *);
11623 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11624 /* get to new offset for the param. */
11625 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11626 /* now how long will this param be? */
11627 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11628 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11629 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11630 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11631 number_entries++;
11632 }
11633 }
11634 if (number_entries == 0) {
11635 return (0);
11636 }
11637 if (number_entries == stcb->asoc.streamoutcnt) {
11638 number_entries = 0;
11639 }
11640 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11641 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11642 }
11643 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11644 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11645 req_out->ph.param_length = htons(len);
11646 req_out->request_seq = htonl(seq);
11647 req_out->response_seq = htonl(resp_seq);
11648 req_out->send_reset_at_tsn = htonl(last_sent);
11649 at = 0;
11650 if (number_entries) {
11651 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11652 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11653 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11654 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11655 req_out->list_of_streams[at] = htons(i);
11656 at++;
11657 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11658 if (at >= number_entries) {
11659 break;
11660 }
11661 }
11662 }
11663 } else {
11664 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11665 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11666 }
11667 }
11668 if (SCTP_SIZE32(len) > len) {
11669 /*-
11670 * Need to worry about the pad we may end up adding to the
11671 * end. This is easy since the struct is either aligned to 4
11672 * bytes or 2 bytes off.
11673 */
11674 req_out->list_of_streams[number_entries] = 0;
11675 }
11676 /* now fix the chunk length */
11677 ch->chunk_length = htons(len + old_len);
11678 chk->book_size = len + old_len;
11679 chk->book_size_scale = 0;
11680 chk->send_size = SCTP_SIZE32(chk->book_size);
11681 SCTP_BUF_LEN(chk->data) = chk->send_size;
11682 return (1);
11683 }
11684
11685 static void
11686 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11687 int number_entries, uint16_t * list,
11688 uint32_t seq)
11689 {
11690 uint16_t len, old_len, i;
11691 struct sctp_stream_reset_in_request *req_in;
11692 struct sctp_chunkhdr *ch;
11693
11694 ch = mtod(chk->data, struct sctp_chunkhdr *);
11695 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11696
11697 /* get to new offset for the param. */
11698 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11699 /* now how long will this param be? */
11700 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11701 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11702 req_in->ph.param_length = htons(len);
11703 req_in->request_seq = htonl(seq);
11704 if (number_entries) {
11705 for (i = 0; i < number_entries; i++) {
11706 req_in->list_of_streams[i] = htons(list[i]);
11707 }
11708 }
11709 if (SCTP_SIZE32(len) > len) {
11710 /*-
11711 * Need to worry about the pad we may end up adding to the
11712 * end. This is easy since the struct is either aligned to 4
11713 * bytes or 2 bytes off.
11714 */
11715 req_in->list_of_streams[number_entries] = 0;
11716 }
11717 /* now fix the chunk length */
11718 ch->chunk_length = htons(len + old_len);
11719 chk->book_size = len + old_len;
11720 chk->book_size_scale = 0;
11721 chk->send_size = SCTP_SIZE32(chk->book_size);
11722 SCTP_BUF_LEN(chk->data) = chk->send_size;
11723 return;
11724 }
11725
11726 static void
11727 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11728 uint32_t seq)
11729 {
11730 uint16_t len, old_len;
11731 struct sctp_stream_reset_tsn_request *req_tsn;
11732 struct sctp_chunkhdr *ch;
11733
11734 ch = mtod(chk->data, struct sctp_chunkhdr *);
11735 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11736
11737 /* get to new offset for the param. */
11738 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11739 /* now how long will this param be? */
11740 len = sizeof(struct sctp_stream_reset_tsn_request);
11741 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11742 req_tsn->ph.param_length = htons(len);
11743 req_tsn->request_seq = htonl(seq);
11744
11745 /* now fix the chunk length */
11746 ch->chunk_length = htons(len + old_len);
11747 chk->send_size = len + old_len;
11748 chk->book_size = SCTP_SIZE32(chk->send_size);
11749 chk->book_size_scale = 0;
11750 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11751 return;
11752 }
11753
11754 void
11755 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11756 uint32_t resp_seq, uint32_t result)
11757 {
11758 uint16_t len, old_len;
11759 struct sctp_stream_reset_response *resp;
11760 struct sctp_chunkhdr *ch;
11761
11762 ch = mtod(chk->data, struct sctp_chunkhdr *);
11763 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11764
11765 /* get to new offset for the param. */
11766 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11767 /* now how long will this param be? */
11768 len = sizeof(struct sctp_stream_reset_response);
11769 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11770 resp->ph.param_length = htons(len);
11771 resp->response_seq = htonl(resp_seq);
11772 resp->result = ntohl(result);
11773
11774 /* now fix the chunk length */
11775 ch->chunk_length = htons(len + old_len);
11776 chk->book_size = len + old_len;
11777 chk->book_size_scale = 0;
11778 chk->send_size = SCTP_SIZE32(chk->book_size);
11779 SCTP_BUF_LEN(chk->data) = chk->send_size;
11780 return;
11781 }
11782
11783 void
11784 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11785 struct sctp_stream_reset_list *ent,
11786 int response)
11787 {
11788 struct sctp_association *asoc;
11789 struct sctp_tmit_chunk *chk;
11790 struct sctp_chunkhdr *ch;
11791
11792 asoc = &stcb->asoc;
11793
11794 /*
11795 * Reset our last reset action to the new one IP -> response
11796 * (PERFORMED probably). This assures that if we fail to send, a
11797 * retran from the peer will get the new response.
11798 */
11799 asoc->last_reset_action[0] = response;
11800 if (asoc->stream_reset_outstanding) {
11801 return;
11802 }
11803 sctp_alloc_a_chunk(stcb, chk);
11804 if (chk == NULL) {
11805 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11806 return;
11807 }
11808 chk->copy_by_ref = 0;
11809 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11810 chk->rec.chunk_id.can_take_data = 0;
11811 chk->flags = 0;
11812 chk->asoc = &stcb->asoc;
11813 chk->book_size = sizeof(struct sctp_chunkhdr);
11814 chk->send_size = SCTP_SIZE32(chk->book_size);
11815 chk->book_size_scale = 0;
11816 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11817 if (chk->data == NULL) {
11818 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11819 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11820 return;
11821 }
11822 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11823 sctp_add_stream_reset_result(chk, ent->seq, response);
11824 /* setup chunk parameters */
11825 chk->sent = SCTP_DATAGRAM_UNSENT;
11826 chk->snd_count = 0;
11827 if (stcb->asoc.alternate) {
11828 chk->whoTo = stcb->asoc.alternate;
11829 } else {
11830 chk->whoTo = stcb->asoc.primary_destination;
11831 }
11832 ch = mtod(chk->data, struct sctp_chunkhdr *);
11833 ch->chunk_type = SCTP_STREAM_RESET;
11834 ch->chunk_flags = 0;
11835 ch->chunk_length = htons(chk->book_size);
11836 atomic_add_int(&chk->whoTo->ref_count, 1);
11837 SCTP_BUF_LEN(chk->data) = chk->send_size;
11838 /* insert the chunk for sending */
11839 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11840 chk,
11841 sctp_next);
11842 asoc->ctrl_queue_cnt++;
11843 }
11844
11845 void
11846 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11847 uint32_t resp_seq, uint32_t result,
11848 uint32_t send_una, uint32_t recv_next)
11849 {
11850 uint16_t len, old_len;
11851 struct sctp_stream_reset_response_tsn *resp;
11852 struct sctp_chunkhdr *ch;
11853
11854 ch = mtod(chk->data, struct sctp_chunkhdr *);
11855 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11856
11857 /* get to new offset for the param. */
11858 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11859 /* now how long will this param be? */
11860 len = sizeof(struct sctp_stream_reset_response_tsn);
11861 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11862 resp->ph.param_length = htons(len);
11863 resp->response_seq = htonl(resp_seq);
11864 resp->result = htonl(result);
11865 resp->senders_next_tsn = htonl(send_una);
11866 resp->receivers_next_tsn = htonl(recv_next);
11867
11868 /* now fix the chunk length */
11869 ch->chunk_length = htons(len + old_len);
11870 chk->book_size = len + old_len;
11871 chk->send_size = SCTP_SIZE32(chk->book_size);
11872 chk->book_size_scale = 0;
11873 SCTP_BUF_LEN(chk->data) = chk->send_size;
11874 return;
11875 }
11876
11877 static void
11878 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11879 uint32_t seq,
11880 uint16_t adding)
11881 {
11882 uint16_t len, old_len;
11883 struct sctp_chunkhdr *ch;
11884 struct sctp_stream_reset_add_strm *addstr;
11885
11886 ch = mtod(chk->data, struct sctp_chunkhdr *);
11887 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11888
11889 /* get to new offset for the param. */
11890 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11891 /* now how long will this param be? */
11892 len = sizeof(struct sctp_stream_reset_add_strm);
11893
11894 /* Fill it out. */
11895 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11896 addstr->ph.param_length = htons(len);
11897 addstr->request_seq = htonl(seq);
11898 addstr->number_of_streams = htons(adding);
11899 addstr->reserved = 0;
11900
11901 /* now fix the chunk length */
11902 ch->chunk_length = htons(len + old_len);
11903 chk->send_size = len + old_len;
11904 chk->book_size = SCTP_SIZE32(chk->send_size);
11905 chk->book_size_scale = 0;
11906 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11907 return;
11908 }
11909
11910 static void
11911 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11912 uint32_t seq,
11913 uint16_t adding)
11914 {
11915 uint16_t len, old_len;
11916 struct sctp_chunkhdr *ch;
11917 struct sctp_stream_reset_add_strm *addstr;
11918
11919 ch = mtod(chk->data, struct sctp_chunkhdr *);
11920 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11921
11922 /* get to new offset for the param. */
11923 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11924 /* now how long will this param be? */
11925 len = sizeof(struct sctp_stream_reset_add_strm);
11926 /* Fill it out. */
11927 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11928 addstr->ph.param_length = htons(len);
11929 addstr->request_seq = htonl(seq);
11930 addstr->number_of_streams = htons(adding);
11931 addstr->reserved = 0;
11932
11933 /* now fix the chunk length */
11934 ch->chunk_length = htons(len + old_len);
11935 chk->send_size = len + old_len;
11936 chk->book_size = SCTP_SIZE32(chk->send_size);
11937 chk->book_size_scale = 0;
11938 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11939 return;
11940 }
11941
11942 int
11943 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
11944 {
11945 struct sctp_association *asoc;
11946 struct sctp_tmit_chunk *chk;
11947 struct sctp_chunkhdr *ch;
11948 uint32_t seq;
11949
11950 asoc = &stcb->asoc;
11951 asoc->trigger_reset = 0;
11952 if (asoc->stream_reset_outstanding) {
11953 return (EALREADY);
11954 }
11955 sctp_alloc_a_chunk(stcb, chk);
11956 if (chk == NULL) {
11957 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11958 return (ENOMEM);
11959 }
11960 chk->copy_by_ref = 0;
11961 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11962 chk->rec.chunk_id.can_take_data = 0;
11963 chk->flags = 0;
11964 chk->asoc = &stcb->asoc;
11965 chk->book_size = sizeof(struct sctp_chunkhdr);
11966 chk->send_size = SCTP_SIZE32(chk->book_size);
11967 chk->book_size_scale = 0;
11968 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11969 if (chk->data == NULL) {
11970 sctp_free_a_chunk(stcb, chk, so_locked);
11971 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11972 return (ENOMEM);
11973 }
11974 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11975
11976 /* setup chunk parameters */
11977 chk->sent = SCTP_DATAGRAM_UNSENT;
11978 chk->snd_count = 0;
11979 if (stcb->asoc.alternate) {
11980 chk->whoTo = stcb->asoc.alternate;
11981 } else {
11982 chk->whoTo = stcb->asoc.primary_destination;
11983 }
11984 ch = mtod(chk->data, struct sctp_chunkhdr *);
11985 ch->chunk_type = SCTP_STREAM_RESET;
11986 ch->chunk_flags = 0;
11987 ch->chunk_length = htons(chk->book_size);
11988 atomic_add_int(&chk->whoTo->ref_count, 1);
11989 SCTP_BUF_LEN(chk->data) = chk->send_size;
11990 seq = stcb->asoc.str_reset_seq_out;
11991 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
11992 seq++;
11993 asoc->stream_reset_outstanding++;
11994 } else {
11995 m_freem(chk->data);
11996 chk->data = NULL;
11997 sctp_free_a_chunk(stcb, chk, so_locked);
11998 return (ENOENT);
11999 }
12000 asoc->str_reset = chk;
12001 /* insert the chunk for sending */
12002 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12003 chk,
12004 sctp_next);
12005 asoc->ctrl_queue_cnt++;
12006
12007 if (stcb->asoc.send_sack) {
12008 sctp_send_sack(stcb, so_locked);
12009 }
12010 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12011 return (0);
12012 }
12013
12014 int
12015 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12016 uint16_t number_entries, uint16_t * list,
12017 uint8_t send_in_req,
12018 uint8_t send_tsn_req,
12019 uint8_t add_stream,
12020 uint16_t adding_o,
12021 uint16_t adding_i, uint8_t peer_asked)
12022 {
12023 struct sctp_association *asoc;
12024 struct sctp_tmit_chunk *chk;
12025 struct sctp_chunkhdr *ch;
12026 int can_send_out_req = 0;
12027 uint32_t seq;
12028
12029 asoc = &stcb->asoc;
12030 if (asoc->stream_reset_outstanding) {
12031 /*-
12032 * Already one pending, must get ACK back to clear the flag.
12033 */
12034 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12035 return (EBUSY);
12036 }
12037 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12038 (add_stream == 0)) {
12039 /* nothing to do */
12040 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12041 return (EINVAL);
12042 }
12043 if (send_tsn_req && send_in_req) {
12044 /* error, can't do that */
12045 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12046 return (EINVAL);
12047 } else if (send_in_req) {
12048 can_send_out_req = 1;
12049 }
12050 if (number_entries > (MCLBYTES -
12051 SCTP_MIN_OVERHEAD -
12052 sizeof(struct sctp_chunkhdr) -
12053 sizeof(struct sctp_stream_reset_out_request)) /
12054 sizeof(uint16_t)) {
12055 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12056 return (ENOMEM);
12057 }
12058 sctp_alloc_a_chunk(stcb, chk);
12059 if (chk == NULL) {
12060 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12061 return (ENOMEM);
12062 }
12063 chk->copy_by_ref = 0;
12064 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12065 chk->rec.chunk_id.can_take_data = 0;
12066 chk->flags = 0;
12067 chk->asoc = &stcb->asoc;
12068 chk->book_size = sizeof(struct sctp_chunkhdr);
12069 chk->send_size = SCTP_SIZE32(chk->book_size);
12070 chk->book_size_scale = 0;
12071
12072 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12073 if (chk->data == NULL) {
12074 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12075 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12076 return (ENOMEM);
12077 }
12078 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12079
12080 /* setup chunk parameters */
12081 chk->sent = SCTP_DATAGRAM_UNSENT;
12082 chk->snd_count = 0;
12083 if (stcb->asoc.alternate) {
12084 chk->whoTo = stcb->asoc.alternate;
12085 } else {
12086 chk->whoTo = stcb->asoc.primary_destination;
12087 }
12088 atomic_add_int(&chk->whoTo->ref_count, 1);
12089 ch = mtod(chk->data, struct sctp_chunkhdr *);
12090 ch->chunk_type = SCTP_STREAM_RESET;
12091 ch->chunk_flags = 0;
12092 ch->chunk_length = htons(chk->book_size);
12093 SCTP_BUF_LEN(chk->data) = chk->send_size;
12094
12095 seq = stcb->asoc.str_reset_seq_out;
12096 if (can_send_out_req) {
12097 int ret;
12098
12099 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12100 if (ret) {
12101 seq++;
12102 asoc->stream_reset_outstanding++;
12103 }
12104 }
12105 if ((add_stream & 1) &&
12106 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12107 /* Need to allocate more */
12108 struct sctp_stream_out *oldstream;
12109 struct sctp_stream_queue_pending *sp, *nsp;
12110 int i;
12111
12112 #if defined(SCTP_DETAILED_STR_STATS)
12113 int j;
12114
12115 #endif
12116
12117 oldstream = stcb->asoc.strmout;
12118 /* get some more */
12119 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12120 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12121 SCTP_M_STRMO);
12122 if (stcb->asoc.strmout == NULL) {
12123 uint8_t x;
12124
12125 stcb->asoc.strmout = oldstream;
12126 /* Turn off the bit */
12127 x = add_stream & 0xfe;
12128 add_stream = x;
12129 goto skip_stuff;
12130 }
12131 /*
12132 * Ok now we proceed with copying the old out stuff and
12133 * initializing the new stuff.
12134 */
12135 SCTP_TCB_SEND_LOCK(stcb);
12136 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12137 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12138 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12139 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12140 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
12141 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12142 stcb->asoc.strmout[i].stream_no = i;
12143 stcb->asoc.strmout[i].state = oldstream[i].state;
12144 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
12145 /* now anything on those queues? */
12146 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12147 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12148 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12149 }
12150 /* Now move assoc pointers too */
12151 if (stcb->asoc.last_out_stream == &oldstream[i]) {
12152 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
12153 }
12154 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
12155 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
12156 }
12157 }
12158 /* now the new streams */
12159 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12160 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12161 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12162 stcb->asoc.strmout[i].chunks_on_queues = 0;
12163 #if defined(SCTP_DETAILED_STR_STATS)
12164 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12165 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12166 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12167 }
12168 #else
12169 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12170 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12171 #endif
12172 stcb->asoc.strmout[i].next_sequence_send = 0x0;
12173 stcb->asoc.strmout[i].stream_no = i;
12174 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12175 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
12176 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12177 }
12178 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12179 SCTP_FREE(oldstream, SCTP_M_STRMO);
12180 SCTP_TCB_SEND_UNLOCK(stcb);
12181 }
12182 skip_stuff:
12183 if ((add_stream & 1) && (adding_o > 0)) {
12184 asoc->strm_pending_add_size = adding_o;
12185 asoc->peer_req_out = peer_asked;
12186 sctp_add_an_out_stream(chk, seq, adding_o);
12187 seq++;
12188 asoc->stream_reset_outstanding++;
12189 }
12190 if ((add_stream & 2) && (adding_i > 0)) {
12191 sctp_add_an_in_stream(chk, seq, adding_i);
12192 seq++;
12193 asoc->stream_reset_outstanding++;
12194 }
12195 if (send_in_req) {
12196 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12197 seq++;
12198 asoc->stream_reset_outstanding++;
12199 }
12200 if (send_tsn_req) {
12201 sctp_add_stream_reset_tsn(chk, seq);
12202 asoc->stream_reset_outstanding++;
12203 }
12204 asoc->str_reset = chk;
12205 /* insert the chunk for sending */
12206 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12207 chk,
12208 sctp_next);
12209 asoc->ctrl_queue_cnt++;
12210 if (stcb->asoc.send_sack) {
12211 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12212 }
12213 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12214 return (0);
12215 }
12216
12217 void
12218 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12219 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12220 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12221 uint32_t vrf_id, uint16_t port)
12222 {
12223 /* Don't respond to an ABORT with an ABORT. */
12224 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12225 if (cause)
12226 sctp_m_freem(cause);
12227 return;
12228 }
12229 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12230 mflowtype, mflowid, fibnum,
12231 vrf_id, port);
12232 return;
12233 }
12234
12235 void
12236 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12237 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12238 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12239 uint32_t vrf_id, uint16_t port)
12240 {
12241 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12242 mflowtype, mflowid, fibnum,
12243 vrf_id, port);
12244 return;
12245 }
12246
12247 static struct mbuf *
12248 sctp_copy_resume(struct uio *uio,
12249 int max_send_len,
12250 int user_marks_eor,
12251 int *error,
12252 uint32_t * sndout,
12253 struct mbuf **new_tail)
12254 {
12255 struct mbuf *m;
12256
12257 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12258 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12259 if (m == NULL) {
12260 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12261 *error = ENOBUFS;
12262 } else {
12263 *sndout = m_length(m, NULL);
12264 *new_tail = m_last(m);
12265 }
12266 return (m);
12267 }
12268
12269 static int
12270 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12271 struct uio *uio,
12272 int resv_upfront)
12273 {
12274 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12275 resv_upfront, 0);
12276 if (sp->data == NULL) {
12277 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12278 return (ENOBUFS);
12279 }
12280 sp->tail_mbuf = m_last(sp->data);
12281 return (0);
12282 }
12283
12284
12285
12286 static struct sctp_stream_queue_pending *
12287 sctp_copy_it_in(struct sctp_tcb *stcb,
12288 struct sctp_association *asoc,
12289 struct sctp_sndrcvinfo *srcv,
12290 struct uio *uio,
12291 struct sctp_nets *net,
12292 int max_send_len,
12293 int user_marks_eor,
12294 int *error)
12295 {
12296 /*-
12297 * This routine must be very careful in its work. Protocol
12298 * processing is up and running so care must be taken to spl...()
12299 * when you need to do something that may effect the stcb/asoc. The
12300 * sb is locked however. When data is copied the protocol processing
12301 * should be enabled since this is a slower operation...
12302 */
12303 struct sctp_stream_queue_pending *sp = NULL;
12304 int resv_in_first;
12305
12306 *error = 0;
12307 /* Now can we send this? */
12308 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12309 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12310 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12311 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12312 /* got data while shutting down */
12313 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12314 *error = ECONNRESET;
12315 goto out_now;
12316 }
12317 sctp_alloc_a_strmoq(stcb, sp);
12318 if (sp == NULL) {
12319 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12320 *error = ENOMEM;
12321 goto out_now;
12322 }
12323 sp->act_flags = 0;
12324 sp->sender_all_done = 0;
12325 sp->sinfo_flags = srcv->sinfo_flags;
12326 sp->timetolive = srcv->sinfo_timetolive;
12327 sp->ppid = srcv->sinfo_ppid;
12328 sp->context = srcv->sinfo_context;
12329 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12330
12331 sp->stream = srcv->sinfo_stream;
12332 sp->length = min(uio->uio_resid, max_send_len);
12333 if ((sp->length == (uint32_t) uio->uio_resid) &&
12334 ((user_marks_eor == 0) ||
12335 (srcv->sinfo_flags & SCTP_EOF) ||
12336 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12337 sp->msg_is_complete = 1;
12338 } else {
12339 sp->msg_is_complete = 0;
12340 }
12341 sp->sender_all_done = 0;
12342 sp->some_taken = 0;
12343 sp->put_last_out = 0;
12344 resv_in_first = sizeof(struct sctp_data_chunk);
12345 sp->data = sp->tail_mbuf = NULL;
12346 if (sp->length == 0) {
12347 *error = 0;
12348 goto skip_copy;
12349 }
12350 if (srcv->sinfo_keynumber_valid) {
12351 sp->auth_keyid = srcv->sinfo_keynumber;
12352 } else {
12353 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12354 }
12355 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12356 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12357 sp->holds_key_ref = 1;
12358 }
12359 *error = sctp_copy_one(sp, uio, resv_in_first);
12360 skip_copy:
12361 if (*error) {
12362 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12363 sp = NULL;
12364 } else {
12365 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12366 sp->net = net;
12367 atomic_add_int(&sp->net->ref_count, 1);
12368 } else {
12369 sp->net = NULL;
12370 }
12371 sctp_set_prsctp_policy(sp);
12372 }
12373 out_now:
12374 return (sp);
12375 }
12376
12377
12378 int
12379 sctp_sosend(struct socket *so,
12380 struct sockaddr *addr,
12381 struct uio *uio,
12382 struct mbuf *top,
12383 struct mbuf *control,
12384 int flags,
12385 struct thread *p
12386 )
12387 {
12388 int error, use_sndinfo = 0;
12389 struct sctp_sndrcvinfo sndrcvninfo;
12390 struct sockaddr *addr_to_use;
12391
12392 #if defined(INET) && defined(INET6)
12393 struct sockaddr_in sin;
12394
12395 #endif
12396
12397 if (control) {
12398 /* process cmsg snd/rcv info (maybe a assoc-id) */
12399 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12400 sizeof(sndrcvninfo))) {
12401 /* got one */
12402 use_sndinfo = 1;
12403 }
12404 }
12405 addr_to_use = addr;
12406 #if defined(INET) && defined(INET6)
12407 if ((addr) && (addr->sa_family == AF_INET6)) {
12408 struct sockaddr_in6 *sin6;
12409
12410 sin6 = (struct sockaddr_in6 *)addr;
12411 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12412 in6_sin6_2_sin(&sin, sin6);
12413 addr_to_use = (struct sockaddr *)&sin;
12414 }
12415 }
12416 #endif
12417 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12418 control,
12419 flags,
12420 use_sndinfo ? &sndrcvninfo : NULL
12421 ,p
12422 );
12423 return (error);
12424 }
12425
12426
12427 int
12428 sctp_lower_sosend(struct socket *so,
12429 struct sockaddr *addr,
12430 struct uio *uio,
12431 struct mbuf *i_pak,
12432 struct mbuf *control,
12433 int flags,
12434 struct sctp_sndrcvinfo *srcv
12435 ,
12436 struct thread *p
12437 )
12438 {
12439 unsigned int sndlen = 0, max_len;
12440 int error, len;
12441 struct mbuf *top = NULL;
12442 int queue_only = 0, queue_only_for_init = 0;
12443 int free_cnt_applied = 0;
12444 int un_sent;
12445 int now_filled = 0;
12446 unsigned int inqueue_bytes = 0;
12447 struct sctp_block_entry be;
12448 struct sctp_inpcb *inp;
12449 struct sctp_tcb *stcb = NULL;
12450 struct timeval now;
12451 struct sctp_nets *net;
12452 struct sctp_association *asoc;
12453 struct sctp_inpcb *t_inp;
12454 int user_marks_eor;
12455 int create_lock_applied = 0;
12456 int nagle_applies = 0;
12457 int some_on_control = 0;
12458 int got_all_of_the_send = 0;
12459 int hold_tcblock = 0;
12460 int non_blocking = 0;
12461 uint32_t local_add_more, local_soresv = 0;
12462 uint16_t port;
12463 uint16_t sinfo_flags;
12464 sctp_assoc_t sinfo_assoc_id;
12465
12466 error = 0;
12467 net = NULL;
12468 stcb = NULL;
12469 asoc = NULL;
12470
12471 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12472 if (inp == NULL) {
12473 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12474 error = EINVAL;
12475 if (i_pak) {
12476 SCTP_RELEASE_PKT(i_pak);
12477 }
12478 return (error);
12479 }
12480 if ((uio == NULL) && (i_pak == NULL)) {
12481 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12482 return (EINVAL);
12483 }
12484 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12485 atomic_add_int(&inp->total_sends, 1);
12486 if (uio) {
12487 if (uio->uio_resid < 0) {
12488 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12489 return (EINVAL);
12490 }
12491 sndlen = uio->uio_resid;
12492 } else {
12493 top = SCTP_HEADER_TO_CHAIN(i_pak);
12494 sndlen = SCTP_HEADER_LEN(i_pak);
12495 }
12496 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12497 (void *)addr,
12498 sndlen);
12499 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12500 (inp->sctp_socket->so_qlimit)) {
12501 /* The listener can NOT send */
12502 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12503 error = ENOTCONN;
12504 goto out_unlocked;
12505 }
12506 /**
12507 * Pre-screen address, if one is given the sin-len
12508 * must be set correctly!
12509 */
12510 if (addr) {
12511 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12512
12513 switch (raddr->sa.sa_family) {
12514 #ifdef INET
12515 case AF_INET:
12516 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12517 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12518 error = EINVAL;
12519 goto out_unlocked;
12520 }
12521 port = raddr->sin.sin_port;
12522 break;
12523 #endif
12524 #ifdef INET6
12525 case AF_INET6:
12526 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12527 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12528 error = EINVAL;
12529 goto out_unlocked;
12530 }
12531 port = raddr->sin6.sin6_port;
12532 break;
12533 #endif
12534 default:
12535 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12536 error = EAFNOSUPPORT;
12537 goto out_unlocked;
12538 }
12539 } else
12540 port = 0;
12541
12542 if (srcv) {
12543 sinfo_flags = srcv->sinfo_flags;
12544 sinfo_assoc_id = srcv->sinfo_assoc_id;
12545 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12546 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12547 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12548 error = EINVAL;
12549 goto out_unlocked;
12550 }
12551 if (srcv->sinfo_flags)
12552 SCTP_STAT_INCR(sctps_sends_with_flags);
12553 } else {
12554 sinfo_flags = inp->def_send.sinfo_flags;
12555 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12556 }
12557 if (sinfo_flags & SCTP_SENDALL) {
12558 /* its a sendall */
12559 error = sctp_sendall(inp, uio, top, srcv);
12560 top = NULL;
12561 goto out_unlocked;
12562 }
12563 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12564 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12565 error = EINVAL;
12566 goto out_unlocked;
12567 }
12568 /* now we must find the assoc */
12569 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12570 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12571 SCTP_INP_RLOCK(inp);
12572 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12573 if (stcb) {
12574 SCTP_TCB_LOCK(stcb);
12575 hold_tcblock = 1;
12576 }
12577 SCTP_INP_RUNLOCK(inp);
12578 } else if (sinfo_assoc_id) {
12579 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12580 } else if (addr) {
12581 /*-
12582 * Since we did not use findep we must
12583 * increment it, and if we don't find a tcb
12584 * decrement it.
12585 */
12586 SCTP_INP_WLOCK(inp);
12587 SCTP_INP_INCR_REF(inp);
12588 SCTP_INP_WUNLOCK(inp);
12589 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12590 if (stcb == NULL) {
12591 SCTP_INP_WLOCK(inp);
12592 SCTP_INP_DECR_REF(inp);
12593 SCTP_INP_WUNLOCK(inp);
12594 } else {
12595 hold_tcblock = 1;
12596 }
12597 }
12598 if ((stcb == NULL) && (addr)) {
12599 /* Possible implicit send? */
12600 SCTP_ASOC_CREATE_LOCK(inp);
12601 create_lock_applied = 1;
12602 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12603 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12604 /* Should I really unlock ? */
12605 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12606 error = EINVAL;
12607 goto out_unlocked;
12608
12609 }
12610 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12611 (addr->sa_family == AF_INET6)) {
12612 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12613 error = EINVAL;
12614 goto out_unlocked;
12615 }
12616 SCTP_INP_WLOCK(inp);
12617 SCTP_INP_INCR_REF(inp);
12618 SCTP_INP_WUNLOCK(inp);
12619 /* With the lock applied look again */
12620 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12621 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12622 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12623 }
12624 if (stcb == NULL) {
12625 SCTP_INP_WLOCK(inp);
12626 SCTP_INP_DECR_REF(inp);
12627 SCTP_INP_WUNLOCK(inp);
12628 } else {
12629 hold_tcblock = 1;
12630 }
12631 if (error) {
12632 goto out_unlocked;
12633 }
12634 if (t_inp != inp) {
12635 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12636 error = ENOTCONN;
12637 goto out_unlocked;
12638 }
12639 }
12640 if (stcb == NULL) {
12641 if (addr == NULL) {
12642 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12643 error = ENOENT;
12644 goto out_unlocked;
12645 } else {
12646 /* We must go ahead and start the INIT process */
12647 uint32_t vrf_id;
12648
12649 if ((sinfo_flags & SCTP_ABORT) ||
12650 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12651 /*-
12652 * User asks to abort a non-existant assoc,
12653 * or EOF a non-existant assoc with no data
12654 */
12655 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12656 error = ENOENT;
12657 goto out_unlocked;
12658 }
12659 /* get an asoc/stcb struct */
12660 vrf_id = inp->def_vrf_id;
12661 #ifdef INVARIANTS
12662 if (create_lock_applied == 0) {
12663 panic("Error, should hold create lock and I don't?");
12664 }
12665 #endif
12666 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12667 inp->sctp_ep.pre_open_stream_count,
12668 p
12669 );
12670 if (stcb == NULL) {
12671 /* Error is setup for us in the call */
12672 goto out_unlocked;
12673 }
12674 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12675 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12676 /*
12677 * Set the connected flag so we can queue
12678 * data
12679 */
12680 soisconnecting(so);
12681 }
12682 hold_tcblock = 1;
12683 if (create_lock_applied) {
12684 SCTP_ASOC_CREATE_UNLOCK(inp);
12685 create_lock_applied = 0;
12686 } else {
12687 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12688 }
12689 /*
12690 * Turn on queue only flag to prevent data from
12691 * being sent
12692 */
12693 queue_only = 1;
12694 asoc = &stcb->asoc;
12695 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12696 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12697
12698 /* initialize authentication params for the assoc */
12699 sctp_initialize_auth_params(inp, stcb);
12700
12701 if (control) {
12702 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12703 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12704 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12705 hold_tcblock = 0;
12706 stcb = NULL;
12707 goto out_unlocked;
12708 }
12709 }
12710 /* out with the INIT */
12711 queue_only_for_init = 1;
12712 /*-
12713 * we may want to dig in after this call and adjust the MTU
12714 * value. It defaulted to 1500 (constant) but the ro
12715 * structure may now have an update and thus we may need to
12716 * change it BEFORE we append the message.
12717 */
12718 }
12719 } else
12720 asoc = &stcb->asoc;
12721 if (srcv == NULL)
12722 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12723 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12724 if (addr)
12725 net = sctp_findnet(stcb, addr);
12726 else
12727 net = NULL;
12728 if ((net == NULL) ||
12729 ((port != 0) && (port != stcb->rport))) {
12730 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12731 error = EINVAL;
12732 goto out_unlocked;
12733 }
12734 } else {
12735 if (stcb->asoc.alternate) {
12736 net = stcb->asoc.alternate;
12737 } else {
12738 net = stcb->asoc.primary_destination;
12739 }
12740 }
12741 atomic_add_int(&stcb->total_sends, 1);
12742 /* Keep the stcb from being freed under our feet */
12743 atomic_add_int(&asoc->refcnt, 1);
12744 free_cnt_applied = 1;
12745
12746 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12747 if (sndlen > asoc->smallest_mtu) {
12748 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12749 error = EMSGSIZE;
12750 goto out_unlocked;
12751 }
12752 }
12753 if (SCTP_SO_IS_NBIO(so)
12754 || (flags & MSG_NBIO)
12755 ) {
12756 non_blocking = 1;
12757 }
12758 /* would we block? */
12759 if (non_blocking) {
12760 if (hold_tcblock == 0) {
12761 SCTP_TCB_LOCK(stcb);
12762 hold_tcblock = 1;
12763 }
12764 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12765 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12766 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12767 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12768 if (sndlen > SCTP_SB_LIMIT_SND(so))
12769 error = EMSGSIZE;
12770 else
12771 error = EWOULDBLOCK;
12772 goto out_unlocked;
12773 }
12774 stcb->asoc.sb_send_resv += sndlen;
12775 SCTP_TCB_UNLOCK(stcb);
12776 hold_tcblock = 0;
12777 } else {
12778 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12779 }
12780 local_soresv = sndlen;
12781 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12782 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12783 error = ECONNRESET;
12784 goto out_unlocked;
12785 }
12786 if (create_lock_applied) {
12787 SCTP_ASOC_CREATE_UNLOCK(inp);
12788 create_lock_applied = 0;
12789 }
12790 /* Is the stream no. valid? */
12791 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12792 /* Invalid stream number */
12793 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12794 error = EINVAL;
12795 goto out_unlocked;
12796 }
12797 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12798 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12799 /*
12800 * Can't queue any data while stream reset is underway.
12801 */
12802 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12803 error = EAGAIN;
12804 } else {
12805 error = EINVAL;
12806 }
12807 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12808 goto out_unlocked;
12809 }
12810 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12811 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12812 queue_only = 1;
12813 }
12814 /* we are now done with all control */
12815 if (control) {
12816 sctp_m_freem(control);
12817 control = NULL;
12818 }
12819 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12820 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12821 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12822 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12823 if (srcv->sinfo_flags & SCTP_ABORT) {
12824 ;
12825 } else {
12826 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12827 error = ECONNRESET;
12828 goto out_unlocked;
12829 }
12830 }
12831 /* Ok, we will attempt a msgsnd :> */
12832 if (p) {
12833 p->td_ru.ru_msgsnd++;
12834 }
12835 /* Are we aborting? */
12836 if (srcv->sinfo_flags & SCTP_ABORT) {
12837 struct mbuf *mm;
12838 int tot_demand, tot_out = 0, max_out;
12839
12840 SCTP_STAT_INCR(sctps_sends_with_abort);
12841 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12842 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12843 /* It has to be up before we abort */
12844 /* how big is the user initiated abort? */
12845 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12846 error = EINVAL;
12847 goto out;
12848 }
12849 if (hold_tcblock) {
12850 SCTP_TCB_UNLOCK(stcb);
12851 hold_tcblock = 0;
12852 }
12853 if (top) {
12854 struct mbuf *cntm = NULL;
12855
12856 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12857 if (sndlen != 0) {
12858 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12859 tot_out += SCTP_BUF_LEN(cntm);
12860 }
12861 }
12862 } else {
12863 /* Must fit in a MTU */
12864 tot_out = sndlen;
12865 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12866 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12867 /* To big */
12868 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12869 error = EMSGSIZE;
12870 goto out;
12871 }
12872 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12873 }
12874 if (mm == NULL) {
12875 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12876 error = ENOMEM;
12877 goto out;
12878 }
12879 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12880 max_out -= sizeof(struct sctp_abort_msg);
12881 if (tot_out > max_out) {
12882 tot_out = max_out;
12883 }
12884 if (mm) {
12885 struct sctp_paramhdr *ph;
12886
12887 /* now move forward the data pointer */
12888 ph = mtod(mm, struct sctp_paramhdr *);
12889 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12890 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
12891 ph++;
12892 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12893 if (top == NULL) {
12894 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12895 if (error) {
12896 /*-
12897 * Here if we can't get his data we
12898 * still abort we just don't get to
12899 * send the users note :-0
12900 */
12901 sctp_m_freem(mm);
12902 mm = NULL;
12903 }
12904 } else {
12905 if (sndlen != 0) {
12906 SCTP_BUF_NEXT(mm) = top;
12907 }
12908 }
12909 }
12910 if (hold_tcblock == 0) {
12911 SCTP_TCB_LOCK(stcb);
12912 }
12913 atomic_add_int(&stcb->asoc.refcnt, -1);
12914 free_cnt_applied = 0;
12915 /* release this lock, otherwise we hang on ourselves */
12916 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12917 /* now relock the stcb so everything is sane */
12918 hold_tcblock = 0;
12919 stcb = NULL;
12920 /*
12921 * In this case top is already chained to mm avoid double
12922 * free, since we free it below if top != NULL and driver
12923 * would free it after sending the packet out
12924 */
12925 if (sndlen != 0) {
12926 top = NULL;
12927 }
12928 goto out_unlocked;
12929 }
12930 /* Calculate the maximum we can send */
12931 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12932 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12933 if (non_blocking) {
12934 /* we already checked for non-blocking above. */
12935 max_len = sndlen;
12936 } else {
12937 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12938 }
12939 } else {
12940 max_len = 0;
12941 }
12942 if (hold_tcblock) {
12943 SCTP_TCB_UNLOCK(stcb);
12944 hold_tcblock = 0;
12945 }
12946 if (asoc->strmout == NULL) {
12947 /* huh? software error */
12948 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12949 error = EFAULT;
12950 goto out_unlocked;
12951 }
12952 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12953 if ((user_marks_eor == 0) &&
12954 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12955 /* It will NEVER fit */
12956 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12957 error = EMSGSIZE;
12958 goto out_unlocked;
12959 }
12960 if ((uio == NULL) && user_marks_eor) {
12961 /*-
12962 * We do not support eeor mode for
12963 * sending with mbuf chains (like sendfile).
12964 */
12965 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12966 error = EINVAL;
12967 goto out_unlocked;
12968 }
12969 if (user_marks_eor) {
12970 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12971 } else {
12972 /*-
12973 * For non-eeor the whole message must fit in
12974 * the socket send buffer.
12975 */
12976 local_add_more = sndlen;
12977 }
12978 len = 0;
12979 if (non_blocking) {
12980 goto skip_preblock;
12981 }
12982 if (((max_len <= local_add_more) &&
12983 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12984 (max_len == 0) ||
12985 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12986 /* No room right now ! */
12987 SOCKBUF_LOCK(&so->so_snd);
12988 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12989 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12990 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12991 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12992 (unsigned int)SCTP_SB_LIMIT_SND(so),
12993 inqueue_bytes,
12994 local_add_more,
12995 stcb->asoc.stream_queue_cnt,
12996 stcb->asoc.chunks_on_out_queue,
12997 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12998 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12999 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13000 }
13001 be.error = 0;
13002 stcb->block_entry = &be;
13003 error = sbwait(&so->so_snd);
13004 stcb->block_entry = NULL;
13005 if (error || so->so_error || be.error) {
13006 if (error == 0) {
13007 if (so->so_error)
13008 error = so->so_error;
13009 if (be.error) {
13010 error = be.error;
13011 }
13012 }
13013 SOCKBUF_UNLOCK(&so->so_snd);
13014 goto out_unlocked;
13015 }
13016 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13017 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13018 asoc, stcb->asoc.total_output_queue_size);
13019 }
13020 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13021 goto out_unlocked;
13022 }
13023 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13024 }
13025 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13026 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13027 } else {
13028 max_len = 0;
13029 }
13030 SOCKBUF_UNLOCK(&so->so_snd);
13031 }
13032 skip_preblock:
13033 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13034 goto out_unlocked;
13035 }
13036 /*
13037 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13038 * case NOTE: uio will be null when top/mbuf is passed
13039 */
13040 if (sndlen == 0) {
13041 if (srcv->sinfo_flags & SCTP_EOF) {
13042 got_all_of_the_send = 1;
13043 goto dataless_eof;
13044 } else {
13045 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13046 error = EINVAL;
13047 goto out;
13048 }
13049 }
13050 if (top == NULL) {
13051 struct sctp_stream_queue_pending *sp;
13052 struct sctp_stream_out *strm;
13053 uint32_t sndout;
13054
13055 SCTP_TCB_SEND_LOCK(stcb);
13056 if ((asoc->stream_locked) &&
13057 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13058 SCTP_TCB_SEND_UNLOCK(stcb);
13059 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13060 error = EINVAL;
13061 goto out;
13062 }
13063 SCTP_TCB_SEND_UNLOCK(stcb);
13064
13065 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13066 if (strm->last_msg_incomplete == 0) {
13067 do_a_copy_in:
13068 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13069 if ((sp == NULL) || (error)) {
13070 goto out;
13071 }
13072 SCTP_TCB_SEND_LOCK(stcb);
13073 if (sp->msg_is_complete) {
13074 strm->last_msg_incomplete = 0;
13075 asoc->stream_locked = 0;
13076 } else {
13077 /*
13078 * Just got locked to this guy in case of an
13079 * interrupt.
13080 */
13081 strm->last_msg_incomplete = 1;
13082 asoc->stream_locked = 1;
13083 asoc->stream_locked_on = srcv->sinfo_stream;
13084 sp->sender_all_done = 0;
13085 }
13086 sctp_snd_sb_alloc(stcb, sp->length);
13087 atomic_add_int(&asoc->stream_queue_cnt, 1);
13088 if (srcv->sinfo_flags & SCTP_UNORDERED) {
13089 SCTP_STAT_INCR(sctps_sends_with_unord);
13090 }
13091 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13092 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13093 SCTP_TCB_SEND_UNLOCK(stcb);
13094 } else {
13095 SCTP_TCB_SEND_LOCK(stcb);
13096 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13097 SCTP_TCB_SEND_UNLOCK(stcb);
13098 if (sp == NULL) {
13099 /* ???? Huh ??? last msg is gone */
13100 #ifdef INVARIANTS
13101 panic("Warning: Last msg marked incomplete, yet nothing left?");
13102 #else
13103 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13104 strm->last_msg_incomplete = 0;
13105 #endif
13106 goto do_a_copy_in;
13107
13108 }
13109 }
13110 while (uio->uio_resid > 0) {
13111 /* How much room do we have? */
13112 struct mbuf *new_tail, *mm;
13113
13114 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13115 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
13116 else
13117 max_len = 0;
13118
13119 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13120 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13121 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13122 sndout = 0;
13123 new_tail = NULL;
13124 if (hold_tcblock) {
13125 SCTP_TCB_UNLOCK(stcb);
13126 hold_tcblock = 0;
13127 }
13128 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13129 if ((mm == NULL) || error) {
13130 if (mm) {
13131 sctp_m_freem(mm);
13132 }
13133 goto out;
13134 }
13135 /* Update the mbuf and count */
13136 SCTP_TCB_SEND_LOCK(stcb);
13137 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13138 /*
13139 * we need to get out. Peer probably
13140 * aborted.
13141 */
13142 sctp_m_freem(mm);
13143 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13144 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13145 error = ECONNRESET;
13146 }
13147 SCTP_TCB_SEND_UNLOCK(stcb);
13148 goto out;
13149 }
13150 if (sp->tail_mbuf) {
13151 /* tack it to the end */
13152 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13153 sp->tail_mbuf = new_tail;
13154 } else {
13155 /* A stolen mbuf */
13156 sp->data = mm;
13157 sp->tail_mbuf = new_tail;
13158 }
13159 sctp_snd_sb_alloc(stcb, sndout);
13160 atomic_add_int(&sp->length, sndout);
13161 len += sndout;
13162
13163 /* Did we reach EOR? */
13164 if ((uio->uio_resid == 0) &&
13165 ((user_marks_eor == 0) ||
13166 (srcv->sinfo_flags & SCTP_EOF) ||
13167 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13168 sp->msg_is_complete = 1;
13169 } else {
13170 sp->msg_is_complete = 0;
13171 }
13172 SCTP_TCB_SEND_UNLOCK(stcb);
13173 }
13174 if (uio->uio_resid == 0) {
13175 /* got it all? */
13176 continue;
13177 }
13178 /* PR-SCTP? */
13179 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13180 /*
13181 * This is ugly but we must assure locking
13182 * order
13183 */
13184 if (hold_tcblock == 0) {
13185 SCTP_TCB_LOCK(stcb);
13186 hold_tcblock = 1;
13187 }
13188 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13189 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13190 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13191 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13192 else
13193 max_len = 0;
13194 if (max_len > 0) {
13195 continue;
13196 }
13197 SCTP_TCB_UNLOCK(stcb);
13198 hold_tcblock = 0;
13199 }
13200 /* wait for space now */
13201 if (non_blocking) {
13202 /* Non-blocking io in place out */
13203 goto skip_out_eof;
13204 }
13205 /* What about the INIT, send it maybe */
13206 if (queue_only_for_init) {
13207 if (hold_tcblock == 0) {
13208 SCTP_TCB_LOCK(stcb);
13209 hold_tcblock = 1;
13210 }
13211 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13212 /* a collision took us forward? */
13213 queue_only = 0;
13214 } else {
13215 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13216 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13217 queue_only = 1;
13218 }
13219 }
13220 if ((net->flight_size > net->cwnd) &&
13221 (asoc->sctp_cmt_on_off == 0)) {
13222 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13223 queue_only = 1;
13224 } else if (asoc->ifp_had_enobuf) {
13225 SCTP_STAT_INCR(sctps_ifnomemqueued);
13226 if (net->flight_size > (2 * net->mtu)) {
13227 queue_only = 1;
13228 }
13229 asoc->ifp_had_enobuf = 0;
13230 }
13231 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13232 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13233 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13234 (stcb->asoc.total_flight > 0) &&
13235 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13236 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13237
13238 /*-
13239 * Ok, Nagle is set on and we have data outstanding.
13240 * Don't send anything and let SACKs drive out the
13241 * data unless we have a "full" segment to send.
13242 */
13243 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13244 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13245 }
13246 SCTP_STAT_INCR(sctps_naglequeued);
13247 nagle_applies = 1;
13248 } else {
13249 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13250 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13251 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13252 }
13253 SCTP_STAT_INCR(sctps_naglesent);
13254 nagle_applies = 0;
13255 }
13256 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13257
13258 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13259 nagle_applies, un_sent);
13260 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13261 stcb->asoc.total_flight,
13262 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13263 }
13264 if (queue_only_for_init)
13265 queue_only_for_init = 0;
13266 if ((queue_only == 0) && (nagle_applies == 0)) {
13267 /*-
13268 * need to start chunk output
13269 * before blocking.. note that if
13270 * a lock is already applied, then
13271 * the input via the net is happening
13272 * and I don't need to start output :-D
13273 */
13274 if (hold_tcblock == 0) {
13275 if (SCTP_TCB_TRYLOCK(stcb)) {
13276 hold_tcblock = 1;
13277 sctp_chunk_output(inp,
13278 stcb,
13279 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13280 }
13281 } else {
13282 sctp_chunk_output(inp,
13283 stcb,
13284 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13285 }
13286 if (hold_tcblock == 1) {
13287 SCTP_TCB_UNLOCK(stcb);
13288 hold_tcblock = 0;
13289 }
13290 }
13291 SOCKBUF_LOCK(&so->so_snd);
13292 /*-
13293 * This is a bit strange, but I think it will
13294 * work. The total_output_queue_size is locked and
13295 * protected by the TCB_LOCK, which we just released.
13296 * There is a race that can occur between releasing it
13297 * above, and me getting the socket lock, where sacks
13298 * come in but we have not put the SB_WAIT on the
13299 * so_snd buffer to get the wakeup. After the LOCK
13300 * is applied the sack_processing will also need to
13301 * LOCK the so->so_snd to do the actual sowwakeup(). So
13302 * once we have the socket buffer lock if we recheck the
13303 * size we KNOW we will get to sleep safely with the
13304 * wakeup flag in place.
13305 */
13306 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13307 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13308 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13309 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13310 asoc, uio->uio_resid);
13311 }
13312 be.error = 0;
13313 stcb->block_entry = &be;
13314 error = sbwait(&so->so_snd);
13315 stcb->block_entry = NULL;
13316
13317 if (error || so->so_error || be.error) {
13318 if (error == 0) {
13319 if (so->so_error)
13320 error = so->so_error;
13321 if (be.error) {
13322 error = be.error;
13323 }
13324 }
13325 SOCKBUF_UNLOCK(&so->so_snd);
13326 goto out_unlocked;
13327 }
13328 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13329 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13330 asoc, stcb->asoc.total_output_queue_size);
13331 }
13332 }
13333 SOCKBUF_UNLOCK(&so->so_snd);
13334 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13335 goto out_unlocked;
13336 }
13337 }
13338 SCTP_TCB_SEND_LOCK(stcb);
13339 if (sp) {
13340 if (sp->msg_is_complete == 0) {
13341 strm->last_msg_incomplete = 1;
13342 asoc->stream_locked = 1;
13343 asoc->stream_locked_on = srcv->sinfo_stream;
13344 } else {
13345 sp->sender_all_done = 1;
13346 strm->last_msg_incomplete = 0;
13347 asoc->stream_locked = 0;
13348 }
13349 } else {
13350 SCTP_PRINTF("Huh no sp TSNH?\n");
13351 strm->last_msg_incomplete = 0;
13352 asoc->stream_locked = 0;
13353 }
13354 SCTP_TCB_SEND_UNLOCK(stcb);
13355 if (uio->uio_resid == 0) {
13356 got_all_of_the_send = 1;
13357 }
13358 } else {
13359 /* We send in a 0, since we do NOT have any locks */
13360 error = sctp_msg_append(stcb, net, top, srcv, 0);
13361 top = NULL;
13362 if (srcv->sinfo_flags & SCTP_EOF) {
13363 /*
13364 * This should only happen for Panda for the mbuf
13365 * send case, which does NOT yet support EEOR mode.
13366 * Thus, we can just set this flag to do the proper
13367 * EOF handling.
13368 */
13369 got_all_of_the_send = 1;
13370 }
13371 }
13372 if (error) {
13373 goto out;
13374 }
13375 dataless_eof:
13376 /* EOF thing ? */
13377 if ((srcv->sinfo_flags & SCTP_EOF) &&
13378 (got_all_of_the_send == 1)) {
13379 int cnt;
13380
13381 SCTP_STAT_INCR(sctps_sends_with_eof);
13382 error = 0;
13383 if (hold_tcblock == 0) {
13384 SCTP_TCB_LOCK(stcb);
13385 hold_tcblock = 1;
13386 }
13387 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13388 if (TAILQ_EMPTY(&asoc->send_queue) &&
13389 TAILQ_EMPTY(&asoc->sent_queue) &&
13390 (cnt == 0)) {
13391 if (asoc->locked_on_sending) {
13392 goto abort_anyway;
13393 }
13394 /* there is nothing queued to send, so I'm done... */
13395 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13396 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13397 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13398 struct sctp_nets *netp;
13399
13400 /* only send SHUTDOWN the first time through */
13401 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13402 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13403 }
13404 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13405 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13406 sctp_stop_timers_for_shutdown(stcb);
13407 if (stcb->asoc.alternate) {
13408 netp = stcb->asoc.alternate;
13409 } else {
13410 netp = stcb->asoc.primary_destination;
13411 }
13412 sctp_send_shutdown(stcb, netp);
13413 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13414 netp);
13415 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13416 asoc->primary_destination);
13417 }
13418 } else {
13419 /*-
13420 * we still got (or just got) data to send, so set
13421 * SHUTDOWN_PENDING
13422 */
13423 /*-
13424 * XXX sockets draft says that SCTP_EOF should be
13425 * sent with no data. currently, we will allow user
13426 * data to be sent first and move to
13427 * SHUTDOWN-PENDING
13428 */
13429 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13430 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13431 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13432 if (hold_tcblock == 0) {
13433 SCTP_TCB_LOCK(stcb);
13434 hold_tcblock = 1;
13435 }
13436 if (asoc->locked_on_sending) {
13437 /* Locked to send out the data */
13438 struct sctp_stream_queue_pending *sp;
13439
13440 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13441 if (sp) {
13442 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13443 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13444 }
13445 }
13446 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13447 if (TAILQ_EMPTY(&asoc->send_queue) &&
13448 TAILQ_EMPTY(&asoc->sent_queue) &&
13449 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13450 struct mbuf *op_err;
13451 char msg[SCTP_DIAG_INFO_LEN];
13452
13453 abort_anyway:
13454 if (free_cnt_applied) {
13455 atomic_add_int(&stcb->asoc.refcnt, -1);
13456 free_cnt_applied = 0;
13457 }
13458 snprintf(msg, sizeof(msg),
13459 "%s:%d at %s", __FILE__, __LINE__, __func__);
13460 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13461 msg);
13462 sctp_abort_an_association(stcb->sctp_ep, stcb,
13463 op_err, SCTP_SO_LOCKED);
13464 /*
13465 * now relock the stcb so everything
13466 * is sane
13467 */
13468 hold_tcblock = 0;
13469 stcb = NULL;
13470 goto out;
13471 }
13472 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13473 asoc->primary_destination);
13474 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13475 }
13476 }
13477 }
13478 skip_out_eof:
13479 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13480 some_on_control = 1;
13481 }
13482 if (queue_only_for_init) {
13483 if (hold_tcblock == 0) {
13484 SCTP_TCB_LOCK(stcb);
13485 hold_tcblock = 1;
13486 }
13487 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13488 /* a collision took us forward? */
13489 queue_only = 0;
13490 } else {
13491 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13492 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13493 queue_only = 1;
13494 }
13495 }
13496 if ((net->flight_size > net->cwnd) &&
13497 (stcb->asoc.sctp_cmt_on_off == 0)) {
13498 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13499 queue_only = 1;
13500 } else if (asoc->ifp_had_enobuf) {
13501 SCTP_STAT_INCR(sctps_ifnomemqueued);
13502 if (net->flight_size > (2 * net->mtu)) {
13503 queue_only = 1;
13504 }
13505 asoc->ifp_had_enobuf = 0;
13506 }
13507 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13508 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13509 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13510 (stcb->asoc.total_flight > 0) &&
13511 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13512 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13513 /*-
13514 * Ok, Nagle is set on and we have data outstanding.
13515 * Don't send anything and let SACKs drive out the
13516 * data unless wen have a "full" segment to send.
13517 */
13518 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13519 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13520 }
13521 SCTP_STAT_INCR(sctps_naglequeued);
13522 nagle_applies = 1;
13523 } else {
13524 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13525 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13526 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13527 }
13528 SCTP_STAT_INCR(sctps_naglesent);
13529 nagle_applies = 0;
13530 }
13531 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13532 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13533 nagle_applies, un_sent);
13534 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13535 stcb->asoc.total_flight,
13536 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13537 }
13538 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13539 /* we can attempt to send too. */
13540 if (hold_tcblock == 0) {
13541 /*
13542 * If there is activity recv'ing sacks no need to
13543 * send
13544 */
13545 if (SCTP_TCB_TRYLOCK(stcb)) {
13546 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13547 hold_tcblock = 1;
13548 }
13549 } else {
13550 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13551 }
13552 } else if ((queue_only == 0) &&
13553 (stcb->asoc.peers_rwnd == 0) &&
13554 (stcb->asoc.total_flight == 0)) {
13555 /* We get to have a probe outstanding */
13556 if (hold_tcblock == 0) {
13557 hold_tcblock = 1;
13558 SCTP_TCB_LOCK(stcb);
13559 }
13560 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13561 } else if (some_on_control) {
13562 int num_out, reason, frag_point;
13563
13564 /* Here we do control only */
13565 if (hold_tcblock == 0) {
13566 hold_tcblock = 1;
13567 SCTP_TCB_LOCK(stcb);
13568 }
13569 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13570 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13571 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13572 }
13573 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13574 queue_only, stcb->asoc.peers_rwnd, un_sent,
13575 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13576 stcb->asoc.total_output_queue_size, error);
13577
13578 out:
13579 out_unlocked:
13580
13581 if (local_soresv && stcb) {
13582 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13583 }
13584 if (create_lock_applied) {
13585 SCTP_ASOC_CREATE_UNLOCK(inp);
13586 }
13587 if ((stcb) && hold_tcblock) {
13588 SCTP_TCB_UNLOCK(stcb);
13589 }
13590 if (stcb && free_cnt_applied) {
13591 atomic_add_int(&stcb->asoc.refcnt, -1);
13592 }
13593 #ifdef INVARIANTS
13594 if (stcb) {
13595 if (mtx_owned(&stcb->tcb_mtx)) {
13596 panic("Leaving with tcb mtx owned?");
13597 }
13598 if (mtx_owned(&stcb->tcb_send_mtx)) {
13599 panic("Leaving with tcb send mtx owned?");
13600 }
13601 }
13602 #endif
13603 if (top) {
13604 sctp_m_freem(top);
13605 }
13606 if (control) {
13607 sctp_m_freem(control);
13608 }
13609 return (error);
13610 }
13611
13612
13613 /*
13614 * generate an AUTHentication chunk, if required
13615 */
13616 struct mbuf *
13617 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13618 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13619 struct sctp_tcb *stcb, uint8_t chunk)
13620 {
13621 struct mbuf *m_auth;
13622 struct sctp_auth_chunk *auth;
13623 int chunk_len;
13624 struct mbuf *cn;
13625
13626 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13627 (stcb == NULL))
13628 return (m);
13629
13630 if (stcb->asoc.auth_supported == 0) {
13631 return (m);
13632 }
13633 /* does the requested chunk require auth? */
13634 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13635 return (m);
13636 }
13637 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13638 if (m_auth == NULL) {
13639 /* no mbuf's */
13640 return (m);
13641 }
13642 /* reserve some space if this will be the first mbuf */
13643 if (m == NULL)
13644 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13645 /* fill in the AUTH chunk details */
13646 auth = mtod(m_auth, struct sctp_auth_chunk *);
13647 bzero(auth, sizeof(*auth));
13648 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13649 auth->ch.chunk_flags = 0;
13650 chunk_len = sizeof(*auth) +
13651 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13652 auth->ch.chunk_length = htons(chunk_len);
13653 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13654 /* key id and hmac digest will be computed and filled in upon send */
13655
13656 /* save the offset where the auth was inserted into the chain */
13657 *offset = 0;
13658 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13659 *offset += SCTP_BUF_LEN(cn);
13660 }
13661
13662 /* update length and return pointer to the auth chunk */
13663 SCTP_BUF_LEN(m_auth) = chunk_len;
13664 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13665 if (auth_ret != NULL)
13666 *auth_ret = auth;
13667
13668 return (m);
13669 }
13670
13671 #ifdef INET6
13672 int
13673 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13674 {
13675 struct nd_prefix *pfx = NULL;
13676 struct nd_pfxrouter *pfxrtr = NULL;
13677 struct sockaddr_in6 gw6;
13678
13679 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13680 return (0);
13681
13682 /* get prefix entry of address */
13683 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13684 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13685 continue;
13686 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13687 &src6->sin6_addr, &pfx->ndpr_mask))
13688 break;
13689 }
13690 /* no prefix entry in the prefix list */
13691 if (pfx == NULL) {
13692 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13693 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13694 return (0);
13695 }
13696 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13697 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13698
13699 /* search installed gateway from prefix entry */
13700 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13701 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13702 gw6.sin6_family = AF_INET6;
13703 gw6.sin6_len = sizeof(struct sockaddr_in6);
13704 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13705 sizeof(struct in6_addr));
13706 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13707 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13708 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13709 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13710 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13711 ro->ro_rt->rt_gateway)) {
13712 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13713 return (1);
13714 }
13715 }
13716 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13717 return (0);
13718 }
13719
13720 #endif
13721
13722 int
13723 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13724 {
13725 #ifdef INET
13726 struct sockaddr_in *sin, *mask;
13727 struct ifaddr *ifa;
13728 struct in_addr srcnetaddr, gwnetaddr;
13729
13730 if (ro == NULL || ro->ro_rt == NULL ||
13731 sifa->address.sa.sa_family != AF_INET) {
13732 return (0);
13733 }
13734 ifa = (struct ifaddr *)sifa->ifa;
13735 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13736 sin = &sifa->address.sin;
13737 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13738 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13739 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13740 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13741
13742 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13743 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13744 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13745 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13746 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13747 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {
13748 return (1);
13749 }
13750 #endif
13751 return (0);
13752 }
Cache object: e92c50e2a6d13f2f2b243fca2082799c
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