1 /*- 2 * Copyright (c) 2001-2007, Cisco Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * a) Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * b) Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the distribution. 13 * 14 * c) Neither the name of Cisco Systems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 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 52 53 54 #define SCTP_MAX_GAPS_INARRAY 4 55 struct sack_track { 56 uint8_t right_edge; /* mergable on the right edge */ 57 uint8_t left_edge; /* mergable on the left edge */ 58 uint8_t num_entries; 59 uint8_t spare; 60 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY]; 61 }; 62 63 struct sack_track sack_array[256] = { 64 {0, 0, 0, 0, /* 0x00 */ 65 {{0, 0}, 66 {0, 0}, 67 {0, 0}, 68 {0, 0} 69 } 70 }, 71 {1, 0, 1, 0, /* 0x01 */ 72 {{0, 0}, 73 {0, 0}, 74 {0, 0}, 75 {0, 0} 76 } 77 }, 78 {0, 0, 1, 0, /* 0x02 */ 79 {{1, 1}, 80 {0, 0}, 81 {0, 0}, 82 {0, 0} 83 } 84 }, 85 {1, 0, 1, 0, /* 0x03 */ 86 {{0, 1}, 87 {0, 0}, 88 {0, 0}, 89 {0, 0} 90 } 91 }, 92 {0, 0, 1, 0, /* 0x04 */ 93 {{2, 2}, 94 {0, 0}, 95 {0, 0}, 96 {0, 0} 97 } 98 }, 99 {1, 0, 2, 0, /* 0x05 */ 100 {{0, 0}, 101 {2, 2}, 102 {0, 0}, 103 {0, 0} 104 } 105 }, 106 {0, 0, 1, 0, /* 0x06 */ 107 {{1, 2}, 108 {0, 0}, 109 {0, 0}, 110 {0, 0} 111 } 112 }, 113 {1, 0, 1, 0, /* 0x07 */ 114 {{0, 2}, 115 {0, 0}, 116 {0, 0}, 117 {0, 0} 118 } 119 }, 120 {0, 0, 1, 0, /* 0x08 */ 121 {{3, 3}, 122 {0, 0}, 123 {0, 0}, 124 {0, 0} 125 } 126 }, 127 {1, 0, 2, 0, /* 0x09 */ 128 {{0, 0}, 129 {3, 3}, 130 {0, 0}, 131 {0, 0} 132 } 133 }, 134 {0, 0, 2, 0, /* 0x0a */ 135 {{1, 1}, 136 {3, 3}, 137 {0, 0}, 138 {0, 0} 139 } 140 }, 141 {1, 0, 2, 0, /* 0x0b */ 142 {{0, 1}, 143 {3, 3}, 144 {0, 0}, 145 {0, 0} 146 } 147 }, 148 {0, 0, 1, 0, /* 0x0c */ 149 {{2, 3}, 150 {0, 0}, 151 {0, 0}, 152 {0, 0} 153 } 154 }, 155 {1, 0, 2, 0, /* 0x0d */ 156 {{0, 0}, 157 {2, 3}, 158 {0, 0}, 159 {0, 0} 160 } 161 }, 162 {0, 0, 1, 0, /* 0x0e */ 163 {{1, 3}, 164 {0, 0}, 165 {0, 0}, 166 {0, 0} 167 } 168 }, 169 {1, 0, 1, 0, /* 0x0f */ 170 {{0, 3}, 171 {0, 0}, 172 {0, 0}, 173 {0, 0} 174 } 175 }, 176 {0, 0, 1, 0, /* 0x10 */ 177 {{4, 4}, 178 {0, 0}, 179 {0, 0}, 180 {0, 0} 181 } 182 }, 183 {1, 0, 2, 0, /* 0x11 */ 184 {{0, 0}, 185 {4, 4}, 186 {0, 0}, 187 {0, 0} 188 } 189 }, 190 {0, 0, 2, 0, /* 0x12 */ 191 {{1, 1}, 192 {4, 4}, 193 {0, 0}, 194 {0, 0} 195 } 196 }, 197 {1, 0, 2, 0, /* 0x13 */ 198 {{0, 1}, 199 {4, 4}, 200 {0, 0}, 201 {0, 0} 202 } 203 }, 204 {0, 0, 2, 0, /* 0x14 */ 205 {{2, 2}, 206 {4, 4}, 207 {0, 0}, 208 {0, 0} 209 } 210 }, 211 {1, 0, 3, 0, /* 0x15 */ 212 {{0, 0}, 213 {2, 2}, 214 {4, 4}, 215 {0, 0} 216 } 217 }, 218 {0, 0, 2, 0, /* 0x16 */ 219 {{1, 2}, 220 {4, 4}, 221 {0, 0}, 222 {0, 0} 223 } 224 }, 225 {1, 0, 2, 0, /* 0x17 */ 226 {{0, 2}, 227 {4, 4}, 228 {0, 0}, 229 {0, 0} 230 } 231 }, 232 {0, 0, 1, 0, /* 0x18 */ 233 {{3, 4}, 234 {0, 0}, 235 {0, 0}, 236 {0, 0} 237 } 238 }, 239 {1, 0, 2, 0, /* 0x19 */ 240 {{0, 0}, 241 {3, 4}, 242 {0, 0}, 243 {0, 0} 244 } 245 }, 246 {0, 0, 2, 0, /* 0x1a */ 247 {{1, 1}, 248 {3, 4}, 249 {0, 0}, 250 {0, 0} 251 } 252 }, 253 {1, 0, 2, 0, /* 0x1b */ 254 {{0, 1}, 255 {3, 4}, 256 {0, 0}, 257 {0, 0} 258 } 259 }, 260 {0, 0, 1, 0, /* 0x1c */ 261 {{2, 4}, 262 {0, 0}, 263 {0, 0}, 264 {0, 0} 265 } 266 }, 267 {1, 0, 2, 0, /* 0x1d */ 268 {{0, 0}, 269 {2, 4}, 270 {0, 0}, 271 {0, 0} 272 } 273 }, 274 {0, 0, 1, 0, /* 0x1e */ 275 {{1, 4}, 276 {0, 0}, 277 {0, 0}, 278 {0, 0} 279 } 280 }, 281 {1, 0, 1, 0, /* 0x1f */ 282 {{0, 4}, 283 {0, 0}, 284 {0, 0}, 285 {0, 0} 286 } 287 }, 288 {0, 0, 1, 0, /* 0x20 */ 289 {{5, 5}, 290 {0, 0}, 291 {0, 0}, 292 {0, 0} 293 } 294 }, 295 {1, 0, 2, 0, /* 0x21 */ 296 {{0, 0}, 297 {5, 5}, 298 {0, 0}, 299 {0, 0} 300 } 301 }, 302 {0, 0, 2, 0, /* 0x22 */ 303 {{1, 1}, 304 {5, 5}, 305 {0, 0}, 306 {0, 0} 307 } 308 }, 309 {1, 0, 2, 0, /* 0x23 */ 310 {{0, 1}, 311 {5, 5}, 312 {0, 0}, 313 {0, 0} 314 } 315 }, 316 {0, 0, 2, 0, /* 0x24 */ 317 {{2, 2}, 318 {5, 5}, 319 {0, 0}, 320 {0, 0} 321 } 322 }, 323 {1, 0, 3, 0, /* 0x25 */ 324 {{0, 0}, 325 {2, 2}, 326 {5, 5}, 327 {0, 0} 328 } 329 }, 330 {0, 0, 2, 0, /* 0x26 */ 331 {{1, 2}, 332 {5, 5}, 333 {0, 0}, 334 {0, 0} 335 } 336 }, 337 {1, 0, 2, 0, /* 0x27 */ 338 {{0, 2}, 339 {5, 5}, 340 {0, 0}, 341 {0, 0} 342 } 343 }, 344 {0, 0, 2, 0, /* 0x28 */ 345 {{3, 3}, 346 {5, 5}, 347 {0, 0}, 348 {0, 0} 349 } 350 }, 351 {1, 0, 3, 0, /* 0x29 */ 352 {{0, 0}, 353 {3, 3}, 354 {5, 5}, 355 {0, 0} 356 } 357 }, 358 {0, 0, 3, 0, /* 0x2a */ 359 {{1, 1}, 360 {3, 3}, 361 {5, 5}, 362 {0, 0} 363 } 364 }, 365 {1, 0, 3, 0, /* 0x2b */ 366 {{0, 1}, 367 {3, 3}, 368 {5, 5}, 369 {0, 0} 370 } 371 }, 372 {0, 0, 2, 0, /* 0x2c */ 373 {{2, 3}, 374 {5, 5}, 375 {0, 0}, 376 {0, 0} 377 } 378 }, 379 {1, 0, 3, 0, /* 0x2d */ 380 {{0, 0}, 381 {2, 3}, 382 {5, 5}, 383 {0, 0} 384 } 385 }, 386 {0, 0, 2, 0, /* 0x2e */ 387 {{1, 3}, 388 {5, 5}, 389 {0, 0}, 390 {0, 0} 391 } 392 }, 393 {1, 0, 2, 0, /* 0x2f */ 394 {{0, 3}, 395 {5, 5}, 396 {0, 0}, 397 {0, 0} 398 } 399 }, 400 {0, 0, 1, 0, /* 0x30 */ 401 {{4, 5}, 402 {0, 0}, 403 {0, 0}, 404 {0, 0} 405 } 406 }, 407 {1, 0, 2, 0, /* 0x31 */ 408 {{0, 0}, 409 {4, 5}, 410 {0, 0}, 411 {0, 0} 412 } 413 }, 414 {0, 0, 2, 0, /* 0x32 */ 415 {{1, 1}, 416 {4, 5}, 417 {0, 0}, 418 {0, 0} 419 } 420 }, 421 {1, 0, 2, 0, /* 0x33 */ 422 {{0, 1}, 423 {4, 5}, 424 {0, 0}, 425 {0, 0} 426 } 427 }, 428 {0, 0, 2, 0, /* 0x34 */ 429 {{2, 2}, 430 {4, 5}, 431 {0, 0}, 432 {0, 0} 433 } 434 }, 435 {1, 0, 3, 0, /* 0x35 */ 436 {{0, 0}, 437 {2, 2}, 438 {4, 5}, 439 {0, 0} 440 } 441 }, 442 {0, 0, 2, 0, /* 0x36 */ 443 {{1, 2}, 444 {4, 5}, 445 {0, 0}, 446 {0, 0} 447 } 448 }, 449 {1, 0, 2, 0, /* 0x37 */ 450 {{0, 2}, 451 {4, 5}, 452 {0, 0}, 453 {0, 0} 454 } 455 }, 456 {0, 0, 1, 0, /* 0x38 */ 457 {{3, 5}, 458 {0, 0}, 459 {0, 0}, 460 {0, 0} 461 } 462 }, 463 {1, 0, 2, 0, /* 0x39 */ 464 {{0, 0}, 465 {3, 5}, 466 {0, 0}, 467 {0, 0} 468 } 469 }, 470 {0, 0, 2, 0, /* 0x3a */ 471 {{1, 1}, 472 {3, 5}, 473 {0, 0}, 474 {0, 0} 475 } 476 }, 477 {1, 0, 2, 0, /* 0x3b */ 478 {{0, 1}, 479 {3, 5}, 480 {0, 0}, 481 {0, 0} 482 } 483 }, 484 {0, 0, 1, 0, /* 0x3c */ 485 {{2, 5}, 486 {0, 0}, 487 {0, 0}, 488 {0, 0} 489 } 490 }, 491 {1, 0, 2, 0, /* 0x3d */ 492 {{0, 0}, 493 {2, 5}, 494 {0, 0}, 495 {0, 0} 496 } 497 }, 498 {0, 0, 1, 0, /* 0x3e */ 499 {{1, 5}, 500 {0, 0}, 501 {0, 0}, 502 {0, 0} 503 } 504 }, 505 {1, 0, 1, 0, /* 0x3f */ 506 {{0, 5}, 507 {0, 0}, 508 {0, 0}, 509 {0, 0} 510 } 511 }, 512 {0, 0, 1, 0, /* 0x40 */ 513 {{6, 6}, 514 {0, 0}, 515 {0, 0}, 516 {0, 0} 517 } 518 }, 519 {1, 0, 2, 0, /* 0x41 */ 520 {{0, 0}, 521 {6, 6}, 522 {0, 0}, 523 {0, 0} 524 } 525 }, 526 {0, 0, 2, 0, /* 0x42 */ 527 {{1, 1}, 528 {6, 6}, 529 {0, 0}, 530 {0, 0} 531 } 532 }, 533 {1, 0, 2, 0, /* 0x43 */ 534 {{0, 1}, 535 {6, 6}, 536 {0, 0}, 537 {0, 0} 538 } 539 }, 540 {0, 0, 2, 0, /* 0x44 */ 541 {{2, 2}, 542 {6, 6}, 543 {0, 0}, 544 {0, 0} 545 } 546 }, 547 {1, 0, 3, 0, /* 0x45 */ 548 {{0, 0}, 549 {2, 2}, 550 {6, 6}, 551 {0, 0} 552 } 553 }, 554 {0, 0, 2, 0, /* 0x46 */ 555 {{1, 2}, 556 {6, 6}, 557 {0, 0}, 558 {0, 0} 559 } 560 }, 561 {1, 0, 2, 0, /* 0x47 */ 562 {{0, 2}, 563 {6, 6}, 564 {0, 0}, 565 {0, 0} 566 } 567 }, 568 {0, 0, 2, 0, /* 0x48 */ 569 {{3, 3}, 570 {6, 6}, 571 {0, 0}, 572 {0, 0} 573 } 574 }, 575 {1, 0, 3, 0, /* 0x49 */ 576 {{0, 0}, 577 {3, 3}, 578 {6, 6}, 579 {0, 0} 580 } 581 }, 582 {0, 0, 3, 0, /* 0x4a */ 583 {{1, 1}, 584 {3, 3}, 585 {6, 6}, 586 {0, 0} 587 } 588 }, 589 {1, 0, 3, 0, /* 0x4b */ 590 {{0, 1}, 591 {3, 3}, 592 {6, 6}, 593 {0, 0} 594 } 595 }, 596 {0, 0, 2, 0, /* 0x4c */ 597 {{2, 3}, 598 {6, 6}, 599 {0, 0}, 600 {0, 0} 601 } 602 }, 603 {1, 0, 3, 0, /* 0x4d */ 604 {{0, 0}, 605 {2, 3}, 606 {6, 6}, 607 {0, 0} 608 } 609 }, 610 {0, 0, 2, 0, /* 0x4e */ 611 {{1, 3}, 612 {6, 6}, 613 {0, 0}, 614 {0, 0} 615 } 616 }, 617 {1, 0, 2, 0, /* 0x4f */ 618 {{0, 3}, 619 {6, 6}, 620 {0, 0}, 621 {0, 0} 622 } 623 }, 624 {0, 0, 2, 0, /* 0x50 */ 625 {{4, 4}, 626 {6, 6}, 627 {0, 0}, 628 {0, 0} 629 } 630 }, 631 {1, 0, 3, 0, /* 0x51 */ 632 {{0, 0}, 633 {4, 4}, 634 {6, 6}, 635 {0, 0} 636 } 637 }, 638 {0, 0, 3, 0, /* 0x52 */ 639 {{1, 1}, 640 {4, 4}, 641 {6, 6}, 642 {0, 0} 643 } 644 }, 645 {1, 0, 3, 0, /* 0x53 */ 646 {{0, 1}, 647 {4, 4}, 648 {6, 6}, 649 {0, 0} 650 } 651 }, 652 {0, 0, 3, 0, /* 0x54 */ 653 {{2, 2}, 654 {4, 4}, 655 {6, 6}, 656 {0, 0} 657 } 658 }, 659 {1, 0, 4, 0, /* 0x55 */ 660 {{0, 0}, 661 {2, 2}, 662 {4, 4}, 663 {6, 6} 664 } 665 }, 666 {0, 0, 3, 0, /* 0x56 */ 667 {{1, 2}, 668 {4, 4}, 669 {6, 6}, 670 {0, 0} 671 } 672 }, 673 {1, 0, 3, 0, /* 0x57 */ 674 {{0, 2}, 675 {4, 4}, 676 {6, 6}, 677 {0, 0} 678 } 679 }, 680 {0, 0, 2, 0, /* 0x58 */ 681 {{3, 4}, 682 {6, 6}, 683 {0, 0}, 684 {0, 0} 685 } 686 }, 687 {1, 0, 3, 0, /* 0x59 */ 688 {{0, 0}, 689 {3, 4}, 690 {6, 6}, 691 {0, 0} 692 } 693 }, 694 {0, 0, 3, 0, /* 0x5a */ 695 {{1, 1}, 696 {3, 4}, 697 {6, 6}, 698 {0, 0} 699 } 700 }, 701 {1, 0, 3, 0, /* 0x5b */ 702 {{0, 1}, 703 {3, 4}, 704 {6, 6}, 705 {0, 0} 706 } 707 }, 708 {0, 0, 2, 0, /* 0x5c */ 709 {{2, 4}, 710 {6, 6}, 711 {0, 0}, 712 {0, 0} 713 } 714 }, 715 {1, 0, 3, 0, /* 0x5d */ 716 {{0, 0}, 717 {2, 4}, 718 {6, 6}, 719 {0, 0} 720 } 721 }, 722 {0, 0, 2, 0, /* 0x5e */ 723 {{1, 4}, 724 {6, 6}, 725 {0, 0}, 726 {0, 0} 727 } 728 }, 729 {1, 0, 2, 0, /* 0x5f */ 730 {{0, 4}, 731 {6, 6}, 732 {0, 0}, 733 {0, 0} 734 } 735 }, 736 {0, 0, 1, 0, /* 0x60 */ 737 {{5, 6}, 738 {0, 0}, 739 {0, 0}, 740 {0, 0} 741 } 742 }, 743 {1, 0, 2, 0, /* 0x61 */ 744 {{0, 0}, 745 {5, 6}, 746 {0, 0}, 747 {0, 0} 748 } 749 }, 750 {0, 0, 2, 0, /* 0x62 */ 751 {{1, 1}, 752 {5, 6}, 753 {0, 0}, 754 {0, 0} 755 } 756 }, 757 {1, 0, 2, 0, /* 0x63 */ 758 {{0, 1}, 759 {5, 6}, 760 {0, 0}, 761 {0, 0} 762 } 763 }, 764 {0, 0, 2, 0, /* 0x64 */ 765 {{2, 2}, 766 {5, 6}, 767 {0, 0}, 768 {0, 0} 769 } 770 }, 771 {1, 0, 3, 0, /* 0x65 */ 772 {{0, 0}, 773 {2, 2}, 774 {5, 6}, 775 {0, 0} 776 } 777 }, 778 {0, 0, 2, 0, /* 0x66 */ 779 {{1, 2}, 780 {5, 6}, 781 {0, 0}, 782 {0, 0} 783 } 784 }, 785 {1, 0, 2, 0, /* 0x67 */ 786 {{0, 2}, 787 {5, 6}, 788 {0, 0}, 789 {0, 0} 790 } 791 }, 792 {0, 0, 2, 0, /* 0x68 */ 793 {{3, 3}, 794 {5, 6}, 795 {0, 0}, 796 {0, 0} 797 } 798 }, 799 {1, 0, 3, 0, /* 0x69 */ 800 {{0, 0}, 801 {3, 3}, 802 {5, 6}, 803 {0, 0} 804 } 805 }, 806 {0, 0, 3, 0, /* 0x6a */ 807 {{1, 1}, 808 {3, 3}, 809 {5, 6}, 810 {0, 0} 811 } 812 }, 813 {1, 0, 3, 0, /* 0x6b */ 814 {{0, 1}, 815 {3, 3}, 816 {5, 6}, 817 {0, 0} 818 } 819 }, 820 {0, 0, 2, 0, /* 0x6c */ 821 {{2, 3}, 822 {5, 6}, 823 {0, 0}, 824 {0, 0} 825 } 826 }, 827 {1, 0, 3, 0, /* 0x6d */ 828 {{0, 0}, 829 {2, 3}, 830 {5, 6}, 831 {0, 0} 832 } 833 }, 834 {0, 0, 2, 0, /* 0x6e */ 835 {{1, 3}, 836 {5, 6}, 837 {0, 0}, 838 {0, 0} 839 } 840 }, 841 {1, 0, 2, 0, /* 0x6f */ 842 {{0, 3}, 843 {5, 6}, 844 {0, 0}, 845 {0, 0} 846 } 847 }, 848 {0, 0, 1, 0, /* 0x70 */ 849 {{4, 6}, 850 {0, 0}, 851 {0, 0}, 852 {0, 0} 853 } 854 }, 855 {1, 0, 2, 0, /* 0x71 */ 856 {{0, 0}, 857 {4, 6}, 858 {0, 0}, 859 {0, 0} 860 } 861 }, 862 {0, 0, 2, 0, /* 0x72 */ 863 {{1, 1}, 864 {4, 6}, 865 {0, 0}, 866 {0, 0} 867 } 868 }, 869 {1, 0, 2, 0, /* 0x73 */ 870 {{0, 1}, 871 {4, 6}, 872 {0, 0}, 873 {0, 0} 874 } 875 }, 876 {0, 0, 2, 0, /* 0x74 */ 877 {{2, 2}, 878 {4, 6}, 879 {0, 0}, 880 {0, 0} 881 } 882 }, 883 {1, 0, 3, 0, /* 0x75 */ 884 {{0, 0}, 885 {2, 2}, 886 {4, 6}, 887 {0, 0} 888 } 889 }, 890 {0, 0, 2, 0, /* 0x76 */ 891 {{1, 2}, 892 {4, 6}, 893 {0, 0}, 894 {0, 0} 895 } 896 }, 897 {1, 0, 2, 0, /* 0x77 */ 898 {{0, 2}, 899 {4, 6}, 900 {0, 0}, 901 {0, 0} 902 } 903 }, 904 {0, 0, 1, 0, /* 0x78 */ 905 {{3, 6}, 906 {0, 0}, 907 {0, 0}, 908 {0, 0} 909 } 910 }, 911 {1, 0, 2, 0, /* 0x79 */ 912 {{0, 0}, 913 {3, 6}, 914 {0, 0}, 915 {0, 0} 916 } 917 }, 918 {0, 0, 2, 0, /* 0x7a */ 919 {{1, 1}, 920 {3, 6}, 921 {0, 0}, 922 {0, 0} 923 } 924 }, 925 {1, 0, 2, 0, /* 0x7b */ 926 {{0, 1}, 927 {3, 6}, 928 {0, 0}, 929 {0, 0} 930 } 931 }, 932 {0, 0, 1, 0, /* 0x7c */ 933 {{2, 6}, 934 {0, 0}, 935 {0, 0}, 936 {0, 0} 937 } 938 }, 939 {1, 0, 2, 0, /* 0x7d */ 940 {{0, 0}, 941 {2, 6}, 942 {0, 0}, 943 {0, 0} 944 } 945 }, 946 {0, 0, 1, 0, /* 0x7e */ 947 {{1, 6}, 948 {0, 0}, 949 {0, 0}, 950 {0, 0} 951 } 952 }, 953 {1, 0, 1, 0, /* 0x7f */ 954 {{0, 6}, 955 {0, 0}, 956 {0, 0}, 957 {0, 0} 958 } 959 }, 960 {0, 1, 1, 0, /* 0x80 */ 961 {{7, 7}, 962 {0, 0}, 963 {0, 0}, 964 {0, 0} 965 } 966 }, 967 {1, 1, 2, 0, /* 0x81 */ 968 {{0, 0}, 969 {7, 7}, 970 {0, 0}, 971 {0, 0} 972 } 973 }, 974 {0, 1, 2, 0, /* 0x82 */ 975 {{1, 1}, 976 {7, 7}, 977 {0, 0}, 978 {0, 0} 979 } 980 }, 981 {1, 1, 2, 0, /* 0x83 */ 982 {{0, 1}, 983 {7, 7}, 984 {0, 0}, 985 {0, 0} 986 } 987 }, 988 {0, 1, 2, 0, /* 0x84 */ 989 {{2, 2}, 990 {7, 7}, 991 {0, 0}, 992 {0, 0} 993 } 994 }, 995 {1, 1, 3, 0, /* 0x85 */ 996 {{0, 0}, 997 {2, 2}, 998 {7, 7}, 999 {0, 0} 1000 } 1001 }, 1002 {0, 1, 2, 0, /* 0x86 */ 1003 {{1, 2}, 1004 {7, 7}, 1005 {0, 0}, 1006 {0, 0} 1007 } 1008 }, 1009 {1, 1, 2, 0, /* 0x87 */ 1010 {{0, 2}, 1011 {7, 7}, 1012 {0, 0}, 1013 {0, 0} 1014 } 1015 }, 1016 {0, 1, 2, 0, /* 0x88 */ 1017 {{3, 3}, 1018 {7, 7}, 1019 {0, 0}, 1020 {0, 0} 1021 } 1022 }, 1023 {1, 1, 3, 0, /* 0x89 */ 1024 {{0, 0}, 1025 {3, 3}, 1026 {7, 7}, 1027 {0, 0} 1028 } 1029 }, 1030 {0, 1, 3, 0, /* 0x8a */ 1031 {{1, 1}, 1032 {3, 3}, 1033 {7, 7}, 1034 {0, 0} 1035 } 1036 }, 1037 {1, 1, 3, 0, /* 0x8b */ 1038 {{0, 1}, 1039 {3, 3}, 1040 {7, 7}, 1041 {0, 0} 1042 } 1043 }, 1044 {0, 1, 2, 0, /* 0x8c */ 1045 {{2, 3}, 1046 {7, 7}, 1047 {0, 0}, 1048 {0, 0} 1049 } 1050 }, 1051 {1, 1, 3, 0, /* 0x8d */ 1052 {{0, 0}, 1053 {2, 3}, 1054 {7, 7}, 1055 {0, 0} 1056 } 1057 }, 1058 {0, 1, 2, 0, /* 0x8e */ 1059 {{1, 3}, 1060 {7, 7}, 1061 {0, 0}, 1062 {0, 0} 1063 } 1064 }, 1065 {1, 1, 2, 0, /* 0x8f */ 1066 {{0, 3}, 1067 {7, 7}, 1068 {0, 0}, 1069 {0, 0} 1070 } 1071 }, 1072 {0, 1, 2, 0, /* 0x90 */ 1073 {{4, 4}, 1074 {7, 7}, 1075 {0, 0}, 1076 {0, 0} 1077 } 1078 }, 1079 {1, 1, 3, 0, /* 0x91 */ 1080 {{0, 0}, 1081 {4, 4}, 1082 {7, 7}, 1083 {0, 0} 1084 } 1085 }, 1086 {0, 1, 3, 0, /* 0x92 */ 1087 {{1, 1}, 1088 {4, 4}, 1089 {7, 7}, 1090 {0, 0} 1091 } 1092 }, 1093 {1, 1, 3, 0, /* 0x93 */ 1094 {{0, 1}, 1095 {4, 4}, 1096 {7, 7}, 1097 {0, 0} 1098 } 1099 }, 1100 {0, 1, 3, 0, /* 0x94 */ 1101 {{2, 2}, 1102 {4, 4}, 1103 {7, 7}, 1104 {0, 0} 1105 } 1106 }, 1107 {1, 1, 4, 0, /* 0x95 */ 1108 {{0, 0}, 1109 {2, 2}, 1110 {4, 4}, 1111 {7, 7} 1112 } 1113 }, 1114 {0, 1, 3, 0, /* 0x96 */ 1115 {{1, 2}, 1116 {4, 4}, 1117 {7, 7}, 1118 {0, 0} 1119 } 1120 }, 1121 {1, 1, 3, 0, /* 0x97 */ 1122 {{0, 2}, 1123 {4, 4}, 1124 {7, 7}, 1125 {0, 0} 1126 } 1127 }, 1128 {0, 1, 2, 0, /* 0x98 */ 1129 {{3, 4}, 1130 {7, 7}, 1131 {0, 0}, 1132 {0, 0} 1133 } 1134 }, 1135 {1, 1, 3, 0, /* 0x99 */ 1136 {{0, 0}, 1137 {3, 4}, 1138 {7, 7}, 1139 {0, 0} 1140 } 1141 }, 1142 {0, 1, 3, 0, /* 0x9a */ 1143 {{1, 1}, 1144 {3, 4}, 1145 {7, 7}, 1146 {0, 0} 1147 } 1148 }, 1149 {1, 1, 3, 0, /* 0x9b */ 1150 {{0, 1}, 1151 {3, 4}, 1152 {7, 7}, 1153 {0, 0} 1154 } 1155 }, 1156 {0, 1, 2, 0, /* 0x9c */ 1157 {{2, 4}, 1158 {7, 7}, 1159 {0, 0}, 1160 {0, 0} 1161 } 1162 }, 1163 {1, 1, 3, 0, /* 0x9d */ 1164 {{0, 0}, 1165 {2, 4}, 1166 {7, 7}, 1167 {0, 0} 1168 } 1169 }, 1170 {0, 1, 2, 0, /* 0x9e */ 1171 {{1, 4}, 1172 {7, 7}, 1173 {0, 0}, 1174 {0, 0} 1175 } 1176 }, 1177 {1, 1, 2, 0, /* 0x9f */ 1178 {{0, 4}, 1179 {7, 7}, 1180 {0, 0}, 1181 {0, 0} 1182 } 1183 }, 1184 {0, 1, 2, 0, /* 0xa0 */ 1185 {{5, 5}, 1186 {7, 7}, 1187 {0, 0}, 1188 {0, 0} 1189 } 1190 }, 1191 {1, 1, 3, 0, /* 0xa1 */ 1192 {{0, 0}, 1193 {5, 5}, 1194 {7, 7}, 1195 {0, 0} 1196 } 1197 }, 1198 {0, 1, 3, 0, /* 0xa2 */ 1199 {{1, 1}, 1200 {5, 5}, 1201 {7, 7}, 1202 {0, 0} 1203 } 1204 }, 1205 {1, 1, 3, 0, /* 0xa3 */ 1206 {{0, 1}, 1207 {5, 5}, 1208 {7, 7}, 1209 {0, 0} 1210 } 1211 }, 1212 {0, 1, 3, 0, /* 0xa4 */ 1213 {{2, 2}, 1214 {5, 5}, 1215 {7, 7}, 1216 {0, 0} 1217 } 1218 }, 1219 {1, 1, 4, 0, /* 0xa5 */ 1220 {{0, 0}, 1221 {2, 2}, 1222 {5, 5}, 1223 {7, 7} 1224 } 1225 }, 1226 {0, 1, 3, 0, /* 0xa6 */ 1227 {{1, 2}, 1228 {5, 5}, 1229 {7, 7}, 1230 {0, 0} 1231 } 1232 }, 1233 {1, 1, 3, 0, /* 0xa7 */ 1234 {{0, 2}, 1235 {5, 5}, 1236 {7, 7}, 1237 {0, 0} 1238 } 1239 }, 1240 {0, 1, 3, 0, /* 0xa8 */ 1241 {{3, 3}, 1242 {5, 5}, 1243 {7, 7}, 1244 {0, 0} 1245 } 1246 }, 1247 {1, 1, 4, 0, /* 0xa9 */ 1248 {{0, 0}, 1249 {3, 3}, 1250 {5, 5}, 1251 {7, 7} 1252 } 1253 }, 1254 {0, 1, 4, 0, /* 0xaa */ 1255 {{1, 1}, 1256 {3, 3}, 1257 {5, 5}, 1258 {7, 7} 1259 } 1260 }, 1261 {1, 1, 4, 0, /* 0xab */ 1262 {{0, 1}, 1263 {3, 3}, 1264 {5, 5}, 1265 {7, 7} 1266 } 1267 }, 1268 {0, 1, 3, 0, /* 0xac */ 1269 {{2, 3}, 1270 {5, 5}, 1271 {7, 7}, 1272 {0, 0} 1273 } 1274 }, 1275 {1, 1, 4, 0, /* 0xad */ 1276 {{0, 0}, 1277 {2, 3}, 1278 {5, 5}, 1279 {7, 7} 1280 } 1281 }, 1282 {0, 1, 3, 0, /* 0xae */ 1283 {{1, 3}, 1284 {5, 5}, 1285 {7, 7}, 1286 {0, 0} 1287 } 1288 }, 1289 {1, 1, 3, 0, /* 0xaf */ 1290 {{0, 3}, 1291 {5, 5}, 1292 {7, 7}, 1293 {0, 0} 1294 } 1295 }, 1296 {0, 1, 2, 0, /* 0xb0 */ 1297 {{4, 5}, 1298 {7, 7}, 1299 {0, 0}, 1300 {0, 0} 1301 } 1302 }, 1303 {1, 1, 3, 0, /* 0xb1 */ 1304 {{0, 0}, 1305 {4, 5}, 1306 {7, 7}, 1307 {0, 0} 1308 } 1309 }, 1310 {0, 1, 3, 0, /* 0xb2 */ 1311 {{1, 1}, 1312 {4, 5}, 1313 {7, 7}, 1314 {0, 0} 1315 } 1316 }, 1317 {1, 1, 3, 0, /* 0xb3 */ 1318 {{0, 1}, 1319 {4, 5}, 1320 {7, 7}, 1321 {0, 0} 1322 } 1323 }, 1324 {0, 1, 3, 0, /* 0xb4 */ 1325 {{2, 2}, 1326 {4, 5}, 1327 {7, 7}, 1328 {0, 0} 1329 } 1330 }, 1331 {1, 1, 4, 0, /* 0xb5 */ 1332 {{0, 0}, 1333 {2, 2}, 1334 {4, 5}, 1335 {7, 7} 1336 } 1337 }, 1338 {0, 1, 3, 0, /* 0xb6 */ 1339 {{1, 2}, 1340 {4, 5}, 1341 {7, 7}, 1342 {0, 0} 1343 } 1344 }, 1345 {1, 1, 3, 0, /* 0xb7 */ 1346 {{0, 2}, 1347 {4, 5}, 1348 {7, 7}, 1349 {0, 0} 1350 } 1351 }, 1352 {0, 1, 2, 0, /* 0xb8 */ 1353 {{3, 5}, 1354 {7, 7}, 1355 {0, 0}, 1356 {0, 0} 1357 } 1358 }, 1359 {1, 1, 3, 0, /* 0xb9 */ 1360 {{0, 0}, 1361 {3, 5}, 1362 {7, 7}, 1363 {0, 0} 1364 } 1365 }, 1366 {0, 1, 3, 0, /* 0xba */ 1367 {{1, 1}, 1368 {3, 5}, 1369 {7, 7}, 1370 {0, 0} 1371 } 1372 }, 1373 {1, 1, 3, 0, /* 0xbb */ 1374 {{0, 1}, 1375 {3, 5}, 1376 {7, 7}, 1377 {0, 0} 1378 } 1379 }, 1380 {0, 1, 2, 0, /* 0xbc */ 1381 {{2, 5}, 1382 {7, 7}, 1383 {0, 0}, 1384 {0, 0} 1385 } 1386 }, 1387 {1, 1, 3, 0, /* 0xbd */ 1388 {{0, 0}, 1389 {2, 5}, 1390 {7, 7}, 1391 {0, 0} 1392 } 1393 }, 1394 {0, 1, 2, 0, /* 0xbe */ 1395 {{1, 5}, 1396 {7, 7}, 1397 {0, 0}, 1398 {0, 0} 1399 } 1400 }, 1401 {1, 1, 2, 0, /* 0xbf */ 1402 {{0, 5}, 1403 {7, 7}, 1404 {0, 0}, 1405 {0, 0} 1406 } 1407 }, 1408 {0, 1, 1, 0, /* 0xc0 */ 1409 {{6, 7}, 1410 {0, 0}, 1411 {0, 0}, 1412 {0, 0} 1413 } 1414 }, 1415 {1, 1, 2, 0, /* 0xc1 */ 1416 {{0, 0}, 1417 {6, 7}, 1418 {0, 0}, 1419 {0, 0} 1420 } 1421 }, 1422 {0, 1, 2, 0, /* 0xc2 */ 1423 {{1, 1}, 1424 {6, 7}, 1425 {0, 0}, 1426 {0, 0} 1427 } 1428 }, 1429 {1, 1, 2, 0, /* 0xc3 */ 1430 {{0, 1}, 1431 {6, 7}, 1432 {0, 0}, 1433 {0, 0} 1434 } 1435 }, 1436 {0, 1, 2, 0, /* 0xc4 */ 1437 {{2, 2}, 1438 {6, 7}, 1439 {0, 0}, 1440 {0, 0} 1441 } 1442 }, 1443 {1, 1, 3, 0, /* 0xc5 */ 1444 {{0, 0}, 1445 {2, 2}, 1446 {6, 7}, 1447 {0, 0} 1448 } 1449 }, 1450 {0, 1, 2, 0, /* 0xc6 */ 1451 {{1, 2}, 1452 {6, 7}, 1453 {0, 0}, 1454 {0, 0} 1455 } 1456 }, 1457 {1, 1, 2, 0, /* 0xc7 */ 1458 {{0, 2}, 1459 {6, 7}, 1460 {0, 0}, 1461 {0, 0} 1462 } 1463 }, 1464 {0, 1, 2, 0, /* 0xc8 */ 1465 {{3, 3}, 1466 {6, 7}, 1467 {0, 0}, 1468 {0, 0} 1469 } 1470 }, 1471 {1, 1, 3, 0, /* 0xc9 */ 1472 {{0, 0}, 1473 {3, 3}, 1474 {6, 7}, 1475 {0, 0} 1476 } 1477 }, 1478 {0, 1, 3, 0, /* 0xca */ 1479 {{1, 1}, 1480 {3, 3}, 1481 {6, 7}, 1482 {0, 0} 1483 } 1484 }, 1485 {1, 1, 3, 0, /* 0xcb */ 1486 {{0, 1}, 1487 {3, 3}, 1488 {6, 7}, 1489 {0, 0} 1490 } 1491 }, 1492 {0, 1, 2, 0, /* 0xcc */ 1493 {{2, 3}, 1494 {6, 7}, 1495 {0, 0}, 1496 {0, 0} 1497 } 1498 }, 1499 {1, 1, 3, 0, /* 0xcd */ 1500 {{0, 0}, 1501 {2, 3}, 1502 {6, 7}, 1503 {0, 0} 1504 } 1505 }, 1506 {0, 1, 2, 0, /* 0xce */ 1507 {{1, 3}, 1508 {6, 7}, 1509 {0, 0}, 1510 {0, 0} 1511 } 1512 }, 1513 {1, 1, 2, 0, /* 0xcf */ 1514 {{0, 3}, 1515 {6, 7}, 1516 {0, 0}, 1517 {0, 0} 1518 } 1519 }, 1520 {0, 1, 2, 0, /* 0xd0 */ 1521 {{4, 4}, 1522 {6, 7}, 1523 {0, 0}, 1524 {0, 0} 1525 } 1526 }, 1527 {1, 1, 3, 0, /* 0xd1 */ 1528 {{0, 0}, 1529 {4, 4}, 1530 {6, 7}, 1531 {0, 0} 1532 } 1533 }, 1534 {0, 1, 3, 0, /* 0xd2 */ 1535 {{1, 1}, 1536 {4, 4}, 1537 {6, 7}, 1538 {0, 0} 1539 } 1540 }, 1541 {1, 1, 3, 0, /* 0xd3 */ 1542 {{0, 1}, 1543 {4, 4}, 1544 {6, 7}, 1545 {0, 0} 1546 } 1547 }, 1548 {0, 1, 3, 0, /* 0xd4 */ 1549 {{2, 2}, 1550 {4, 4}, 1551 {6, 7}, 1552 {0, 0} 1553 } 1554 }, 1555 {1, 1, 4, 0, /* 0xd5 */ 1556 {{0, 0}, 1557 {2, 2}, 1558 {4, 4}, 1559 {6, 7} 1560 } 1561 }, 1562 {0, 1, 3, 0, /* 0xd6 */ 1563 {{1, 2}, 1564 {4, 4}, 1565 {6, 7}, 1566 {0, 0} 1567 } 1568 }, 1569 {1, 1, 3, 0, /* 0xd7 */ 1570 {{0, 2}, 1571 {4, 4}, 1572 {6, 7}, 1573 {0, 0} 1574 } 1575 }, 1576 {0, 1, 2, 0, /* 0xd8 */ 1577 {{3, 4}, 1578 {6, 7}, 1579 {0, 0}, 1580 {0, 0} 1581 } 1582 }, 1583 {1, 1, 3, 0, /* 0xd9 */ 1584 {{0, 0}, 1585 {3, 4}, 1586 {6, 7}, 1587 {0, 0} 1588 } 1589 }, 1590 {0, 1, 3, 0, /* 0xda */ 1591 {{1, 1}, 1592 {3, 4}, 1593 {6, 7}, 1594 {0, 0} 1595 } 1596 }, 1597 {1, 1, 3, 0, /* 0xdb */ 1598 {{0, 1}, 1599 {3, 4}, 1600 {6, 7}, 1601 {0, 0} 1602 } 1603 }, 1604 {0, 1, 2, 0, /* 0xdc */ 1605 {{2, 4}, 1606 {6, 7}, 1607 {0, 0}, 1608 {0, 0} 1609 } 1610 }, 1611 {1, 1, 3, 0, /* 0xdd */ 1612 {{0, 0}, 1613 {2, 4}, 1614 {6, 7}, 1615 {0, 0} 1616 } 1617 }, 1618 {0, 1, 2, 0, /* 0xde */ 1619 {{1, 4}, 1620 {6, 7}, 1621 {0, 0}, 1622 {0, 0} 1623 } 1624 }, 1625 {1, 1, 2, 0, /* 0xdf */ 1626 {{0, 4}, 1627 {6, 7}, 1628 {0, 0}, 1629 {0, 0} 1630 } 1631 }, 1632 {0, 1, 1, 0, /* 0xe0 */ 1633 {{5, 7}, 1634 {0, 0}, 1635 {0, 0}, 1636 {0, 0} 1637 } 1638 }, 1639 {1, 1, 2, 0, /* 0xe1 */ 1640 {{0, 0}, 1641 {5, 7}, 1642 {0, 0}, 1643 {0, 0} 1644 } 1645 }, 1646 {0, 1, 2, 0, /* 0xe2 */ 1647 {{1, 1}, 1648 {5, 7}, 1649 {0, 0}, 1650 {0, 0} 1651 } 1652 }, 1653 {1, 1, 2, 0, /* 0xe3 */ 1654 {{0, 1}, 1655 {5, 7}, 1656 {0, 0}, 1657 {0, 0} 1658 } 1659 }, 1660 {0, 1, 2, 0, /* 0xe4 */ 1661 {{2, 2}, 1662 {5, 7}, 1663 {0, 0}, 1664 {0, 0} 1665 } 1666 }, 1667 {1, 1, 3, 0, /* 0xe5 */ 1668 {{0, 0}, 1669 {2, 2}, 1670 {5, 7}, 1671 {0, 0} 1672 } 1673 }, 1674 {0, 1, 2, 0, /* 0xe6 */ 1675 {{1, 2}, 1676 {5, 7}, 1677 {0, 0}, 1678 {0, 0} 1679 } 1680 }, 1681 {1, 1, 2, 0, /* 0xe7 */ 1682 {{0, 2}, 1683 {5, 7}, 1684 {0, 0}, 1685 {0, 0} 1686 } 1687 }, 1688 {0, 1, 2, 0, /* 0xe8 */ 1689 {{3, 3}, 1690 {5, 7}, 1691 {0, 0}, 1692 {0, 0} 1693 } 1694 }, 1695 {1, 1, 3, 0, /* 0xe9 */ 1696 {{0, 0}, 1697 {3, 3}, 1698 {5, 7}, 1699 {0, 0} 1700 } 1701 }, 1702 {0, 1, 3, 0, /* 0xea */ 1703 {{1, 1}, 1704 {3, 3}, 1705 {5, 7}, 1706 {0, 0} 1707 } 1708 }, 1709 {1, 1, 3, 0, /* 0xeb */ 1710 {{0, 1}, 1711 {3, 3}, 1712 {5, 7}, 1713 {0, 0} 1714 } 1715 }, 1716 {0, 1, 2, 0, /* 0xec */ 1717 {{2, 3}, 1718 {5, 7}, 1719 {0, 0}, 1720 {0, 0} 1721 } 1722 }, 1723 {1, 1, 3, 0, /* 0xed */ 1724 {{0, 0}, 1725 {2, 3}, 1726 {5, 7}, 1727 {0, 0} 1728 } 1729 }, 1730 {0, 1, 2, 0, /* 0xee */ 1731 {{1, 3}, 1732 {5, 7}, 1733 {0, 0}, 1734 {0, 0} 1735 } 1736 }, 1737 {1, 1, 2, 0, /* 0xef */ 1738 {{0, 3}, 1739 {5, 7}, 1740 {0, 0}, 1741 {0, 0} 1742 } 1743 }, 1744 {0, 1, 1, 0, /* 0xf0 */ 1745 {{4, 7}, 1746 {0, 0}, 1747 {0, 0}, 1748 {0, 0} 1749 } 1750 }, 1751 {1, 1, 2, 0, /* 0xf1 */ 1752 {{0, 0}, 1753 {4, 7}, 1754 {0, 0}, 1755 {0, 0} 1756 } 1757 }, 1758 {0, 1, 2, 0, /* 0xf2 */ 1759 {{1, 1}, 1760 {4, 7}, 1761 {0, 0}, 1762 {0, 0} 1763 } 1764 }, 1765 {1, 1, 2, 0, /* 0xf3 */ 1766 {{0, 1}, 1767 {4, 7}, 1768 {0, 0}, 1769 {0, 0} 1770 } 1771 }, 1772 {0, 1, 2, 0, /* 0xf4 */ 1773 {{2, 2}, 1774 {4, 7}, 1775 {0, 0}, 1776 {0, 0} 1777 } 1778 }, 1779 {1, 1, 3, 0, /* 0xf5 */ 1780 {{0, 0}, 1781 {2, 2}, 1782 {4, 7}, 1783 {0, 0} 1784 } 1785 }, 1786 {0, 1, 2, 0, /* 0xf6 */ 1787 {{1, 2}, 1788 {4, 7}, 1789 {0, 0}, 1790 {0, 0} 1791 } 1792 }, 1793 {1, 1, 2, 0, /* 0xf7 */ 1794 {{0, 2}, 1795 {4, 7}, 1796 {0, 0}, 1797 {0, 0} 1798 } 1799 }, 1800 {0, 1, 1, 0, /* 0xf8 */ 1801 {{3, 7}, 1802 {0, 0}, 1803 {0, 0}, 1804 {0, 0} 1805 } 1806 }, 1807 {1, 1, 2, 0, /* 0xf9 */ 1808 {{0, 0}, 1809 {3, 7}, 1810 {0, 0}, 1811 {0, 0} 1812 } 1813 }, 1814 {0, 1, 2, 0, /* 0xfa */ 1815 {{1, 1}, 1816 {3, 7}, 1817 {0, 0}, 1818 {0, 0} 1819 } 1820 }, 1821 {1, 1, 2, 0, /* 0xfb */ 1822 {{0, 1}, 1823 {3, 7}, 1824 {0, 0}, 1825 {0, 0} 1826 } 1827 }, 1828 {0, 1, 1, 0, /* 0xfc */ 1829 {{2, 7}, 1830 {0, 0}, 1831 {0, 0}, 1832 {0, 0} 1833 } 1834 }, 1835 {1, 1, 2, 0, /* 0xfd */ 1836 {{0, 0}, 1837 {2, 7}, 1838 {0, 0}, 1839 {0, 0} 1840 } 1841 }, 1842 {0, 1, 1, 0, /* 0xfe */ 1843 {{1, 7}, 1844 {0, 0}, 1845 {0, 0}, 1846 {0, 0} 1847 } 1848 }, 1849 {1, 1, 1, 0, /* 0xff */ 1850 {{0, 7}, 1851 {0, 0}, 1852 {0, 0}, 1853 {0, 0} 1854 } 1855 } 1856 }; 1857 1858 1859 int 1860 sctp_is_address_in_scope(struct sctp_ifa *ifa, 1861 int ipv4_addr_legal, 1862 int ipv6_addr_legal, 1863 int loopback_scope, 1864 int ipv4_local_scope, 1865 int local_scope, 1866 int site_scope, 1867 int do_update) 1868 { 1869 if ((loopback_scope == 0) && 1870 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) { 1871 /* 1872 * skip loopback if not in scope * 1873 */ 1874 return (0); 1875 } 1876 if ((ifa->address.sa.sa_family == AF_INET) && ipv4_addr_legal) { 1877 struct sockaddr_in *sin; 1878 1879 sin = (struct sockaddr_in *)&ifa->address.sin; 1880 if (sin->sin_addr.s_addr == 0) { 1881 /* not in scope , unspecified */ 1882 return (0); 1883 } 1884 if ((ipv4_local_scope == 0) && 1885 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 1886 /* private address not in scope */ 1887 return (0); 1888 } 1889 } else if ((ifa->address.sa.sa_family == AF_INET6) && ipv6_addr_legal) { 1890 struct sockaddr_in6 *sin6; 1891 1892 /* 1893 * Must update the flags, bummer, which means any IFA locks 1894 * must now be applied HERE <-> 1895 */ 1896 if (do_update) { 1897 sctp_gather_internal_ifa_flags(ifa); 1898 } 1899 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1900 return (0); 1901 } 1902 /* ok to use deprecated addresses? */ 1903 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 1904 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1905 /* skip unspecifed addresses */ 1906 return (0); 1907 } 1908 if ( /* (local_scope == 0) && */ 1909 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 1910 return (0); 1911 } 1912 if ((site_scope == 0) && 1913 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1914 return (0); 1915 } 1916 } else { 1917 return (0); 1918 } 1919 return (1); 1920 } 1921 1922 static struct mbuf * 1923 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa) 1924 { 1925 struct sctp_paramhdr *parmh; 1926 struct mbuf *mret; 1927 int len; 1928 1929 if (ifa->address.sa.sa_family == AF_INET) { 1930 len = sizeof(struct sctp_ipv4addr_param); 1931 } else if (ifa->address.sa.sa_family == AF_INET6) { 1932 len = sizeof(struct sctp_ipv6addr_param); 1933 } else { 1934 /* unknown type */ 1935 return (m); 1936 } 1937 if (M_TRAILINGSPACE(m) >= len) { 1938 /* easy side we just drop it on the end */ 1939 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m))); 1940 mret = m; 1941 } else { 1942 /* Need more space */ 1943 mret = m; 1944 while (SCTP_BUF_NEXT(mret) != NULL) { 1945 mret = SCTP_BUF_NEXT(mret); 1946 } 1947 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(len, 0, M_DONTWAIT, 1, MT_DATA); 1948 if (SCTP_BUF_NEXT(mret) == NULL) { 1949 /* We are hosed, can't add more addresses */ 1950 return (m); 1951 } 1952 mret = SCTP_BUF_NEXT(mret); 1953 parmh = mtod(mret, struct sctp_paramhdr *); 1954 } 1955 /* now add the parameter */ 1956 if (ifa->address.sa.sa_family == AF_INET) { 1957 struct sctp_ipv4addr_param *ipv4p; 1958 struct sockaddr_in *sin; 1959 1960 sin = (struct sockaddr_in *)&ifa->address.sin; 1961 ipv4p = (struct sctp_ipv4addr_param *)parmh; 1962 parmh->param_type = htons(SCTP_IPV4_ADDRESS); 1963 parmh->param_length = htons(len); 1964 ipv4p->addr = sin->sin_addr.s_addr; 1965 SCTP_BUF_LEN(mret) += len; 1966 } else if (ifa->address.sa.sa_family == AF_INET6) { 1967 struct sctp_ipv6addr_param *ipv6p; 1968 struct sockaddr_in6 *sin6; 1969 1970 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 1971 ipv6p = (struct sctp_ipv6addr_param *)parmh; 1972 parmh->param_type = htons(SCTP_IPV6_ADDRESS); 1973 parmh->param_length = htons(len); 1974 memcpy(ipv6p->addr, &sin6->sin6_addr, 1975 sizeof(ipv6p->addr)); 1976 /* clear embedded scope in the address */ 1977 in6_clearscope((struct in6_addr *)ipv6p->addr); 1978 SCTP_BUF_LEN(mret) += len; 1979 } else { 1980 return (m); 1981 } 1982 return (mret); 1983 } 1984 1985 1986 struct mbuf * 1987 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_scoping *scope, 1988 struct mbuf *m_at, int cnt_inits_to) 1989 { 1990 struct sctp_vrf *vrf = NULL; 1991 int cnt, limit_out = 0, total_count; 1992 uint32_t vrf_id; 1993 1994 vrf_id = inp->def_vrf_id; 1995 SCTP_IPI_ADDR_LOCK(); 1996 vrf = sctp_find_vrf(vrf_id); 1997 if (vrf == NULL) { 1998 SCTP_IPI_ADDR_UNLOCK(); 1999 return (m_at); 2000 } 2001 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 2002 struct sctp_ifa *sctp_ifap; 2003 struct sctp_ifn *sctp_ifnp; 2004 2005 cnt = cnt_inits_to; 2006 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) { 2007 limit_out = 1; 2008 cnt = SCTP_ADDRESS_LIMIT; 2009 goto skip_count; 2010 } 2011 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 2012 if ((scope->loopback_scope == 0) && 2013 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { 2014 /* 2015 * Skip loopback devices if loopback_scope 2016 * not set 2017 */ 2018 continue; 2019 } 2020 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 2021 if (sctp_is_address_in_scope(sctp_ifap, 2022 scope->ipv4_addr_legal, 2023 scope->ipv6_addr_legal, 2024 scope->loopback_scope, 2025 scope->ipv4_local_scope, 2026 scope->local_scope, 2027 scope->site_scope, 1) == 0) { 2028 continue; 2029 } 2030 cnt++; 2031 if (cnt > SCTP_ADDRESS_LIMIT) { 2032 break; 2033 } 2034 } 2035 if (cnt > SCTP_ADDRESS_LIMIT) { 2036 break; 2037 } 2038 } 2039 skip_count: 2040 if (cnt > 1) { 2041 total_count = 0; 2042 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 2043 cnt = 0; 2044 if ((scope->loopback_scope == 0) && 2045 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { 2046 /* 2047 * Skip loopback devices if 2048 * loopback_scope not set 2049 */ 2050 continue; 2051 } 2052 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 2053 if (sctp_is_address_in_scope(sctp_ifap, 2054 scope->ipv4_addr_legal, 2055 scope->ipv6_addr_legal, 2056 scope->loopback_scope, 2057 scope->ipv4_local_scope, 2058 scope->local_scope, 2059 scope->site_scope, 0) == 0) { 2060 continue; 2061 } 2062 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap); 2063 if (limit_out) { 2064 cnt++; 2065 total_count++; 2066 if (cnt >= 2) { 2067 /* 2068 * two from each 2069 * address 2070 */ 2071 break; 2072 } 2073 if (total_count > SCTP_ADDRESS_LIMIT) { 2074 /* No more addresses */ 2075 break; 2076 } 2077 } 2078 } 2079 } 2080 } 2081 } else { 2082 struct sctp_laddr *laddr; 2083 2084 cnt = cnt_inits_to; 2085 /* First, how many ? */ 2086 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2087 if (laddr->ifa == NULL) { 2088 continue; 2089 } 2090 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 2091 /* 2092 * Address being deleted by the system, dont 2093 * list. 2094 */ 2095 continue; 2096 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2097 /* 2098 * Address being deleted on this ep don't 2099 * list. 2100 */ 2101 continue; 2102 } 2103 if (sctp_is_address_in_scope(laddr->ifa, 2104 scope->ipv4_addr_legal, 2105 scope->ipv6_addr_legal, 2106 scope->loopback_scope, 2107 scope->ipv4_local_scope, 2108 scope->local_scope, 2109 scope->site_scope, 1) == 0) { 2110 continue; 2111 } 2112 cnt++; 2113 } 2114 if (cnt > SCTP_ADDRESS_LIMIT) { 2115 limit_out = 1; 2116 } 2117 /* 2118 * To get through a NAT we only list addresses if we have 2119 * more than one. That way if you just bind a single address 2120 * we let the source of the init dictate our address. 2121 */ 2122 if (cnt > 1) { 2123 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2124 cnt = 0; 2125 if (laddr->ifa == NULL) { 2126 continue; 2127 } 2128 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 2129 continue; 2130 2131 if (sctp_is_address_in_scope(laddr->ifa, 2132 scope->ipv4_addr_legal, 2133 scope->ipv6_addr_legal, 2134 scope->loopback_scope, 2135 scope->ipv4_local_scope, 2136 scope->local_scope, 2137 scope->site_scope, 0) == 0) { 2138 continue; 2139 } 2140 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa); 2141 cnt++; 2142 if (cnt >= SCTP_ADDRESS_LIMIT) { 2143 break; 2144 } 2145 } 2146 } 2147 } 2148 SCTP_IPI_ADDR_UNLOCK(); 2149 return (m_at); 2150 } 2151 2152 static struct sctp_ifa * 2153 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa, 2154 uint8_t dest_is_loop, 2155 uint8_t dest_is_priv, 2156 sa_family_t fam) 2157 { 2158 uint8_t dest_is_global = 0; 2159 2160 /* dest_is_priv is true if destination is a private address */ 2161 /* dest_is_loop is true if destination is a loopback addresses */ 2162 2163 /* 2164 * Here we determine if its a preferred address. A preferred address 2165 * means it is the same scope or higher scope then the destination. 2166 * L = loopback, P = private, G = global 2167 * ----------------------------------------- src | dest | result 2168 * ---------------------------------------- L | L | yes 2169 * ----------------------------------------- P | L | 2170 * yes-v4 no-v6 ----------------------------------------- G | 2171 * L | yes-v4 no-v6 ----------------------------------------- L 2172 * | P | no ----------------------------------------- P | 2173 * P | yes ----------------------------------------- G | 2174 * P | no ----------------------------------------- L | G 2175 * | no ----------------------------------------- P | G | 2176 * no ----------------------------------------- G | G | 2177 * yes ----------------------------------------- 2178 */ 2179 2180 if (ifa->address.sa.sa_family != fam) { 2181 /* forget mis-matched family */ 2182 return (NULL); 2183 } 2184 if ((dest_is_priv == 0) && (dest_is_loop == 0)) { 2185 dest_is_global = 1; 2186 } 2187 #ifdef SCTP_DEBUG 2188 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 2189 printf("Is destination preferred:"); 2190 sctp_print_address(&ifa->address.sa); 2191 } 2192 #endif 2193 2194 /* Ok the address may be ok */ 2195 if (fam == AF_INET6) { 2196 /* ok to use deprecated addresses? */ 2197 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2198 #ifdef SCTP_DEBUG 2199 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 2200 printf("NO:1\n"); 2201 } 2202 #endif 2203 return (NULL); 2204 } 2205 if (ifa->src_is_priv) { 2206 if (dest_is_loop) { 2207 #ifdef SCTP_DEBUG 2208 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 2209 printf("NO:2\n"); 2210 } 2211 #endif 2212 return (NULL); 2213 } 2214 } 2215 if (ifa->src_is_glob) { 2216 2217 if (dest_is_loop) { 2218 #ifdef SCTP_DEBUG 2219 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 2220 printf("NO:3\n"); 2221 } 2222 #endif 2223 return (NULL); 2224 } 2225 } 2226 } 2227 /* 2228 * Now that we know what is what, implement or table this could in 2229 * theory be done slicker (it used to be), but this is 2230 * straightforward and easier to validate :-) 2231 */ 2232 #ifdef SCTP_DEBUG 2233 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 2234 printf("src_loop:%d src_priv:%d src_glob:%d\n", 2235 ifa->src_is_loop, ifa->src_is_priv, 2236 ifa->src_is_glob); 2237 printf("dest_loop:%d dest_priv:%d dest_glob:%d\n", 2238 dest_is_loop, dest_is_priv, 2239 dest_is_global); 2240 } 2241 #endif 2242 2243 if ((ifa->src_is_loop) && (dest_is_priv)) { 2244 #ifdef SCTP_DEBUG 2245 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 2246 printf("NO:4\n"); 2247 } 2248 #endif 2249 return (NULL); 2250 } 2251 if ((ifa->src_is_glob) && (dest_is_priv)) { 2252 #ifdef SCTP_DEBUG 2253 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 2254 printf("NO:5\n"); 2255 } 2256 #endif 2257 return (NULL); 2258 } 2259 if ((ifa->src_is_loop) && (dest_is_global)) { 2260 #ifdef SCTP_DEBUG 2261 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 2262 printf("NO:6\n"); 2263 } 2264 #endif 2265 return (NULL); 2266 } 2267 if ((ifa->src_is_priv) && (dest_is_global)) { 2268 #ifdef SCTP_DEBUG 2269 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 2270 printf("NO:7\n"); 2271 } 2272 #endif 2273 return (NULL); 2274 } 2275 #ifdef SCTP_DEBUG 2276 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 2277 printf("YES\n"); 2278 } 2279 #endif 2280 /* its a preferred address */ 2281 return (ifa); 2282 } 2283 2284 static struct sctp_ifa * 2285 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa, 2286 uint8_t dest_is_loop, 2287 uint8_t dest_is_priv, 2288 sa_family_t fam) 2289 { 2290 uint8_t dest_is_global = 0; 2291 2292 2293 /* 2294 * Here we determine if its a acceptable address. A acceptable 2295 * address means it is the same scope or higher scope but we can 2296 * allow for NAT which means its ok to have a global dest and a 2297 * private src. 2298 * 2299 * L = loopback, P = private, G = global 2300 * ----------------------------------------- src | dest | result 2301 * ----------------------------------------- L | L | yes 2302 * ----------------------------------------- P | L | 2303 * yes-v4 no-v6 ----------------------------------------- G | 2304 * L | yes ----------------------------------------- L | 2305 * P | no ----------------------------------------- P | P 2306 * | yes ----------------------------------------- G | P 2307 * | yes - May not work ----------------------------------------- 2308 * L | G | no ----------------------------------------- P 2309 * | G | yes - May not work 2310 * ----------------------------------------- G | G | yes 2311 * ----------------------------------------- 2312 */ 2313 2314 if (ifa->address.sa.sa_family != fam) { 2315 /* forget non matching family */ 2316 return (NULL); 2317 } 2318 /* Ok the address may be ok */ 2319 if ((dest_is_loop == 0) && (dest_is_priv == 0)) { 2320 dest_is_global = 1; 2321 } 2322 if (fam == AF_INET6) { 2323 /* ok to use deprecated addresses? */ 2324 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2325 return (NULL); 2326 } 2327 if (ifa->src_is_priv) { 2328 /* Special case, linklocal to loop */ 2329 if (dest_is_loop) 2330 return (NULL); 2331 } 2332 } 2333 /* 2334 * Now that we know what is what, implement our table. This could in 2335 * theory be done slicker (it used to be), but this is 2336 * straightforward and easier to validate :-) 2337 */ 2338 if ((ifa->src_is_loop == 1) && (dest_is_priv)) { 2339 return (NULL); 2340 } 2341 if ((ifa->src_is_loop == 1) && (dest_is_global)) { 2342 return (NULL); 2343 } 2344 /* its an acceptable address */ 2345 return (ifa); 2346 } 2347 2348 int 2349 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 2350 { 2351 struct sctp_laddr *laddr; 2352 2353 if (stcb == NULL) { 2354 /* There are no restrictions, no TCB :-) */ 2355 return (0); 2356 } 2357 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 2358 if (laddr->ifa == NULL) { 2359 #ifdef SCTP_DEBUG 2360 if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) { 2361 printf("Help I have fallen and I can't get up!\n"); 2362 } 2363 #endif 2364 continue; 2365 } 2366 if (laddr->ifa == ifa) { 2367 /* Yes it is on the list */ 2368 return (1); 2369 } 2370 } 2371 return (0); 2372 } 2373 2374 2375 int 2376 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 2377 { 2378 struct sctp_laddr *laddr; 2379 2380 if (ifa == NULL) 2381 return (0); 2382 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2383 if (laddr->ifa == NULL) { 2384 #ifdef SCTP_DEBUG 2385 if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) { 2386 printf("Help I have fallen and I can't get up!\n"); 2387 } 2388 #endif 2389 continue; 2390 } 2391 if ((laddr->ifa == ifa) && laddr->action == 0) 2392 /* same pointer */ 2393 return (1); 2394 } 2395 return (0); 2396 } 2397 2398 2399 2400 static struct sctp_ifa * 2401 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp, 2402 sctp_route_t * ro, 2403 uint32_t vrf_id, 2404 int non_asoc_addr_ok, 2405 uint8_t dest_is_priv, 2406 uint8_t dest_is_loop, 2407 sa_family_t fam) 2408 { 2409 struct sctp_laddr *laddr, *starting_point; 2410 void *ifn; 2411 int resettotop = 0; 2412 struct sctp_ifn *sctp_ifn; 2413 struct sctp_ifa *sctp_ifa, *sifa; 2414 struct sctp_vrf *vrf; 2415 uint32_t ifn_index; 2416 2417 vrf = sctp_find_vrf(vrf_id); 2418 if (vrf == NULL) 2419 return (NULL); 2420 2421 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2422 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2423 sctp_ifn = sctp_find_ifn(vrf, ifn, ifn_index); 2424 /* 2425 * first question, is the ifn we will emit on in our list, if so, we 2426 * want such an address. Note that we first looked for a preferred 2427 * address. 2428 */ 2429 if (sctp_ifn) { 2430 /* is a preferred one on the interface we route out? */ 2431 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2432 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2433 continue; 2434 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam); 2435 if (sifa == NULL) 2436 continue; 2437 if (sctp_is_addr_in_ep(inp, sifa)) { 2438 atomic_add_int(&sifa->refcount, 1); 2439 return (sifa); 2440 } 2441 } 2442 } 2443 /* 2444 * ok, now we now need to find one on the list of the addresses. We 2445 * can't get one on the emitting interface so let's find first a 2446 * preferred one. If not that an acceptable one otherwise... we 2447 * return NULL. 2448 */ 2449 starting_point = inp->next_addr_touse; 2450 once_again: 2451 if (inp->next_addr_touse == NULL) { 2452 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); 2453 resettotop = 1; 2454 } 2455 for (laddr = inp->next_addr_touse; laddr; laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2456 if (laddr->ifa == NULL) { 2457 /* address has been removed */ 2458 continue; 2459 } 2460 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam); 2461 if (sifa == NULL) 2462 continue; 2463 atomic_add_int(&sifa->refcount, 1); 2464 return (sifa); 2465 } 2466 if (resettotop == 0) { 2467 inp->next_addr_touse = NULL; 2468 goto once_again; 2469 } 2470 inp->next_addr_touse = starting_point; 2471 resettotop = 0; 2472 once_again_too: 2473 if (inp->next_addr_touse == NULL) { 2474 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); 2475 resettotop = 1; 2476 } 2477 /* ok, what about an acceptable address in the inp */ 2478 for (laddr = inp->next_addr_touse; laddr; laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2479 if (laddr->ifa == NULL) { 2480 /* address has been removed */ 2481 continue; 2482 } 2483 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, dest_is_priv, fam); 2484 if (sifa == NULL) 2485 continue; 2486 atomic_add_int(&sifa->refcount, 1); 2487 return (sifa); 2488 } 2489 if (resettotop == 0) { 2490 inp->next_addr_touse = NULL; 2491 goto once_again_too; 2492 } 2493 /* 2494 * no address bound can be a source for the destination we are in 2495 * trouble 2496 */ 2497 return (NULL); 2498 } 2499 2500 2501 2502 static struct sctp_ifa * 2503 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp, 2504 struct sctp_tcb *stcb, 2505 struct sctp_nets *net, 2506 sctp_route_t * ro, 2507 uint32_t vrf_id, 2508 uint8_t dest_is_priv, 2509 uint8_t dest_is_loop, 2510 int non_asoc_addr_ok, 2511 sa_family_t fam) 2512 { 2513 struct sctp_laddr *laddr, *starting_point; 2514 void *ifn; 2515 struct sctp_ifn *sctp_ifn; 2516 struct sctp_ifa *sctp_ifa, *sifa; 2517 uint8_t start_at_beginning = 0; 2518 struct sctp_vrf *vrf; 2519 uint32_t ifn_index; 2520 2521 /* 2522 * first question, is the ifn we will emit on in our list, if so, we 2523 * want that one. 2524 */ 2525 vrf = sctp_find_vrf(vrf_id); 2526 if (vrf == NULL) 2527 return (NULL); 2528 2529 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2530 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2531 sctp_ifn = sctp_find_ifn(vrf, ifn, ifn_index); 2532 2533 /* 2534 * first question, is the ifn we will emit on in our list? If so, 2535 * we want that one. First we look for a preferred. Second, we go 2536 * for an acceptable. 2537 */ 2538 if (sctp_ifn) { 2539 /* first try for a preferred address on the ep */ 2540 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2541 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2542 continue; 2543 if (sctp_is_addr_in_ep(inp, sctp_ifa)) { 2544 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam); 2545 if (sifa == NULL) 2546 continue; 2547 if ((non_asoc_addr_ok == 0) && 2548 (sctp_is_addr_restricted(stcb, sifa))) { 2549 /* on the no-no list */ 2550 continue; 2551 } 2552 atomic_add_int(&sifa->refcount, 1); 2553 return (sifa); 2554 } 2555 } 2556 /* next try for an acceptable address on the ep */ 2557 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2558 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2559 continue; 2560 if (sctp_is_addr_in_ep(inp, sctp_ifa)) { 2561 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam); 2562 if (sifa == NULL) 2563 continue; 2564 if ((non_asoc_addr_ok == 0) && 2565 (sctp_is_addr_restricted(stcb, sifa))) { 2566 /* on the no-no list */ 2567 continue; 2568 } 2569 atomic_add_int(&sifa->refcount, 1); 2570 return (sifa); 2571 } 2572 } 2573 2574 } 2575 /* 2576 * if we can't find one like that then we must look at all addresses 2577 * bound to pick one at first preferable then secondly acceptable. 2578 */ 2579 starting_point = stcb->asoc.last_used_address; 2580 sctp_from_the_top: 2581 if (stcb->asoc.last_used_address == NULL) { 2582 start_at_beginning = 1; 2583 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); 2584 } 2585 /* search beginning with the last used address */ 2586 for (laddr = stcb->asoc.last_used_address; laddr; 2587 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2588 if (laddr->ifa == NULL) { 2589 /* address has been removed */ 2590 continue; 2591 } 2592 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam); 2593 if (sifa == NULL) 2594 continue; 2595 if ((non_asoc_addr_ok == 0) && 2596 (sctp_is_addr_restricted(stcb, sifa))) { 2597 /* on the no-no list */ 2598 continue; 2599 } 2600 stcb->asoc.last_used_address = laddr; 2601 atomic_add_int(&sifa->refcount, 1); 2602 return (sifa); 2603 2604 } 2605 if (start_at_beginning == 0) { 2606 stcb->asoc.last_used_address = NULL; 2607 goto sctp_from_the_top; 2608 } 2609 /* now try for any higher scope than the destination */ 2610 stcb->asoc.last_used_address = starting_point; 2611 start_at_beginning = 0; 2612 sctp_from_the_top2: 2613 if (stcb->asoc.last_used_address == NULL) { 2614 start_at_beginning = 1; 2615 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); 2616 } 2617 /* search beginning with the last used address */ 2618 for (laddr = stcb->asoc.last_used_address; laddr; 2619 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2620 if (laddr->ifa == NULL) { 2621 /* address has been removed */ 2622 continue; 2623 } 2624 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, dest_is_priv, fam); 2625 if (sifa == NULL) 2626 continue; 2627 if ((non_asoc_addr_ok == 0) && 2628 (sctp_is_addr_restricted(stcb, sifa))) { 2629 /* on the no-no list */ 2630 continue; 2631 } 2632 stcb->asoc.last_used_address = laddr; 2633 atomic_add_int(&sifa->refcount, 1); 2634 return (sifa); 2635 } 2636 if (start_at_beginning == 0) { 2637 stcb->asoc.last_used_address = NULL; 2638 goto sctp_from_the_top2; 2639 } 2640 return (NULL); 2641 } 2642 2643 static struct sctp_ifa * 2644 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn, 2645 struct sctp_tcb *stcb, 2646 int non_asoc_addr_ok, 2647 uint8_t dest_is_loop, 2648 uint8_t dest_is_priv, 2649 int addr_wanted, 2650 sa_family_t fam) 2651 { 2652 struct sctp_ifa *ifa, *sifa; 2653 int num_eligible_addr = 0; 2654 2655 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { 2656 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2657 continue; 2658 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, dest_is_priv, fam); 2659 if (sifa == NULL) 2660 continue; 2661 if (stcb) { 2662 if ((non_asoc_addr_ok == 0) && sctp_is_addr_restricted(stcb, sifa)) { 2663 /* 2664 * It is restricted for some reason.. 2665 * probably not yet added. 2666 */ 2667 continue; 2668 } 2669 } 2670 if (num_eligible_addr >= addr_wanted) { 2671 return (sifa); 2672 } 2673 num_eligible_addr++; 2674 } 2675 return (NULL); 2676 } 2677 2678 2679 static int 2680 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn, 2681 struct sctp_tcb *stcb, 2682 int non_asoc_addr_ok, 2683 uint8_t dest_is_loop, 2684 uint8_t dest_is_priv, 2685 sa_family_t fam) 2686 { 2687 struct sctp_ifa *ifa, *sifa; 2688 int num_eligible_addr = 0; 2689 2690 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { 2691 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) { 2692 continue; 2693 } 2694 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, dest_is_priv, fam); 2695 if (sifa == NULL) { 2696 continue; 2697 } 2698 if (stcb) { 2699 if ((non_asoc_addr_ok == 0) && sctp_is_addr_restricted(stcb, sifa)) { 2700 /* 2701 * It is restricted for some reason.. 2702 * probably not yet added. 2703 */ 2704 continue; 2705 } 2706 } 2707 num_eligible_addr++; 2708 } 2709 return (num_eligible_addr); 2710 } 2711 2712 static struct sctp_ifa * 2713 sctp_choose_boundall(struct sctp_inpcb *inp, 2714 struct sctp_tcb *stcb, 2715 struct sctp_nets *net, 2716 sctp_route_t * ro, 2717 uint32_t vrf_id, 2718 uint8_t dest_is_priv, 2719 uint8_t dest_is_loop, 2720 int non_asoc_addr_ok, 2721 sa_family_t fam) 2722 { 2723 int cur_addr_num = 0, num_preferred = 0; 2724 void *ifn; 2725 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn; 2726 struct sctp_ifa *sctp_ifa, *sifa; 2727 uint32_t ifn_index; 2728 struct sctp_vrf *vrf; 2729 2730 /* 2731 * For boundall we can use any address in the association. If 2732 * non_asoc_addr_ok is set we can use any address (at least in 2733 * theory). So we look for preferred addresses first. If we find 2734 * one, we use it. Otherwise we next try to get an address on the 2735 * interface, which we should be able to do (unless non_asoc_addr_ok 2736 * is false and we are routed out that way). In these cases where we 2737 * can't use the address of the interface we go through all the 2738 * ifn's looking for an address we can use and fill that in. Punting 2739 * means we send back address 0, which will probably cause problems 2740 * actually since then IP will fill in the address of the route ifn, 2741 * which means we probably already rejected it.. i.e. here comes an 2742 * abort :-<. 2743 */ 2744 vrf = sctp_find_vrf(vrf_id); 2745 if (vrf == NULL) 2746 return (NULL); 2747 2748 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2749 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2750 2751 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(vrf, ifn, ifn_index); 2752 if (sctp_ifn == NULL) { 2753 /* ?? We don't have this guy ?? */ 2754 goto bound_all_plan_b; 2755 } 2756 if (net) { 2757 cur_addr_num = net->indx_of_eligible_next_to_use; 2758 } 2759 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, 2760 stcb, 2761 non_asoc_addr_ok, 2762 dest_is_loop, 2763 dest_is_priv, fam); 2764 #ifdef SCTP_DEBUG 2765 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 2766 printf("Found %d preferred source addresses\n", num_preferred); 2767 } 2768 #endif 2769 if (num_preferred == 0) { 2770 /* 2771 * no eligible addresses, we must use some other interface 2772 * address if we can find one. 2773 */ 2774 goto bound_all_plan_b; 2775 } 2776 /* 2777 * Ok we have num_eligible_addr set with how many we can use, this 2778 * may vary from call to call due to addresses being deprecated 2779 * etc.. 2780 */ 2781 if (cur_addr_num >= num_preferred) { 2782 cur_addr_num = 0; 2783 } 2784 /* 2785 * select the nth address from the list (where cur_addr_num is the 2786 * nth) and 0 is the first one, 1 is the second one etc... 2787 */ 2788 #ifdef SCTP_DEBUG 2789 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 2790 printf("cur_addr_num:%d\n", cur_addr_num); 2791 } 2792 #endif 2793 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop, 2794 dest_is_priv, cur_addr_num, fam); 2795 2796 /* if sctp_ifa is NULL something changed??, fall to plan b. */ 2797 if (sctp_ifa) { 2798 atomic_add_int(&sctp_ifa->refcount, 1); 2799 if (net) { 2800 /* save off where the next one we will want */ 2801 net->indx_of_eligible_next_to_use = cur_addr_num + 1; 2802 } 2803 return (sctp_ifa); 2804 } 2805 /* 2806 * plan_b: Look at all interfaces and find a preferred address. If 2807 * no preferred fall through to plan_c. 2808 */ 2809 bound_all_plan_b: 2810 #ifdef SCTP_DEBUG 2811 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 2812 printf("Plan B?\n"); 2813 } 2814 #endif 2815 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2816 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2817 /* wrong base scope */ 2818 continue; 2819 } 2820 if ((sctp_ifn == looked_at) && looked_at) 2821 /* already looked at this guy */ 2822 continue; 2823 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, stcb, non_asoc_addr_ok, 2824 dest_is_loop, dest_is_priv, fam); 2825 #ifdef SCTP_DEBUG 2826 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 2827 printf("Found ifn:%p %d preferred source addresses\n", ifn, num_preferred); 2828 } 2829 #endif 2830 if (num_preferred == 0) { 2831 /* 2832 * None on this interface. 2833 */ 2834 continue; 2835 } 2836 #ifdef SCTP_DEBUG 2837 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 2838 printf("num preferred:%d on interface:%p cur_addr_num:%d\n", 2839 num_preferred, 2840 sctp_ifn, 2841 cur_addr_num); 2842 } 2843 #endif 2844 2845 /* 2846 * Ok we have num_eligible_addr set with how many we can 2847 * use, this may vary from call to call due to addresses 2848 * being deprecated etc.. 2849 */ 2850 if (cur_addr_num >= num_preferred) { 2851 cur_addr_num = 0; 2852 } 2853 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop, 2854 dest_is_priv, cur_addr_num, fam); 2855 if (sifa == NULL) 2856 continue; 2857 if (net) { 2858 net->indx_of_eligible_next_to_use = cur_addr_num + 1; 2859 #ifdef SCTP_DEBUG 2860 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 2861 printf("we selected %d\n", cur_addr_num); 2862 printf("Source:"); 2863 sctp_print_address(&sifa->address.sa); 2864 printf("Dest:"); 2865 sctp_print_address(&net->ro._l_addr.sa); 2866 } 2867 #endif 2868 } 2869 atomic_add_int(&sifa->refcount, 1); 2870 return (sifa); 2871 2872 } 2873 2874 /* 2875 * plan_c: See if we have an acceptable address on the emit 2876 * interface 2877 */ 2878 #ifdef SCTP_DEBUG 2879 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 2880 printf("Plan C no preferred for Dest, acceptable for?\n"); 2881 } 2882 #endif 2883 2884 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) { 2885 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2886 (non_asoc_addr_ok == 0)) 2887 continue; 2888 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, 2889 dest_is_priv, fam); 2890 if (sifa == NULL) 2891 continue; 2892 if (stcb) { 2893 if ((non_asoc_addr_ok == 0) && 2894 sctp_is_addr_restricted(stcb, sifa)) { 2895 /* 2896 * It is restricted for some reason.. 2897 * probably not yet added. 2898 */ 2899 continue; 2900 } 2901 } 2902 atomic_add_int(&sifa->refcount, 1); 2903 return (sifa); 2904 } 2905 2906 /* 2907 * plan_d: We are in trouble. No preferred address on the emit 2908 * interface. And not even a perfered address on all interfaces. Go 2909 * out and see if we can find an acceptable address somewhere 2910 * amongst all interfaces. 2911 */ 2912 #ifdef SCTP_DEBUG 2913 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 2914 printf("Plan C fails plan D?\n"); 2915 } 2916 #endif 2917 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2918 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2919 /* wrong base scope */ 2920 continue; 2921 } 2922 if ((sctp_ifn == looked_at) && looked_at) 2923 /* already looked at this guy */ 2924 continue; 2925 2926 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2927 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2928 (non_asoc_addr_ok == 0)) 2929 continue; 2930 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, 2931 dest_is_loop, 2932 dest_is_priv, fam); 2933 if (sifa == NULL) 2934 continue; 2935 if (stcb) { 2936 if ((non_asoc_addr_ok == 0) && 2937 sctp_is_addr_restricted(stcb, sifa)) { 2938 /* 2939 * It is restricted for some 2940 * reason.. probably not yet added. 2941 */ 2942 continue; 2943 } 2944 } 2945 atomic_add_int(&sifa->refcount, 1); 2946 return (sifa); 2947 } 2948 } 2949 /* 2950 * Ok we can find NO address to source from that is not on our 2951 * negative list and non_asoc_address is NOT ok, or its on our 2952 * negative list. We cant source to it :-( 2953 */ 2954 return (NULL); 2955 } 2956 2957 2958 2959 /* tcb may be NULL */ 2960 struct sctp_ifa * 2961 sctp_source_address_selection(struct sctp_inpcb *inp, 2962 struct sctp_tcb *stcb, 2963 sctp_route_t * ro, 2964 struct sctp_nets *net, 2965 int non_asoc_addr_ok, uint32_t vrf_id) 2966 { 2967 2968 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst; 2969 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst; 2970 struct sctp_ifa *answer; 2971 uint8_t dest_is_priv, dest_is_loop; 2972 int did_rtalloc = 0; 2973 sa_family_t fam; 2974 2975 /* 2976 * Rules: - Find the route if needed, cache if I can. - Look at 2977 * interface address in route, Is it in the bound list. If so we 2978 * have the best source. - If not we must rotate amongst the 2979 * addresses. 2980 * 2981 * Cavets and issues 2982 * 2983 * Do we need to pay attention to scope. We can have a private address 2984 * or a global address we are sourcing or sending to. So if we draw 2985 * it out zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 2986 * For V4 ------------------------------------------ source * 2987 * dest * result ----------------------------------------- <a> 2988 * Private * Global * NAT 2989 * ----------------------------------------- <b> Private * 2990 * Private * No problem ----------------------------------------- 2991 * <c> Global * Private * Huh, How will this work? 2992 * ----------------------------------------- <d> Global * 2993 * Global * No Problem ------------------------------------------ 2994 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz For V6 2995 * ------------------------------------------ source * dest * 2996 * result ----------------------------------------- <a> Linklocal * 2997 * Global * ----------------------------------------- <b> 2998 * Linklocal * Linklocal * No problem 2999 * ----------------------------------------- <c> Global * 3000 * Linklocal * Huh, How will this work? 3001 * ----------------------------------------- <d> Global * 3002 * Global * No Problem ------------------------------------------ 3003 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3004 * 3005 * And then we add to that what happens if there are multiple addresses 3006 * assigned to an interface. Remember the ifa on a ifn is a linked 3007 * list of addresses. So one interface can have more than one IP 3008 * address. What happens if we have both a private and a global 3009 * address? Do we then use context of destination to sort out which 3010 * one is best? And what about NAT's sending P->G may get you a NAT 3011 * translation, or should you select the G thats on the interface in 3012 * preference. 3013 * 3014 * Decisions: 3015 * 3016 * - count the number of addresses on the interface. - if its one, no 3017 * problem except case <c>. For <a> we will assume a NAT out there. 3018 * - if there are more than one, then we need to worry about scope P 3019 * or G. We should prefer G -> G and P -> P if possible. Then as a 3020 * secondary fall back to mixed types G->P being a last ditch one. - 3021 * The above all works for bound all, but bound specific we need to 3022 * use the same concept but instead only consider the bound 3023 * addresses. If the bound set is NOT assigned to the interface then 3024 * we must use rotation amongst the bound addresses.. 3025 */ 3026 if (ro->ro_rt == NULL) { 3027 /* 3028 * Need a route to cache. 3029 */ 3030 rtalloc_ign(ro, 0UL); 3031 did_rtalloc = 1; 3032 } 3033 if (ro->ro_rt == NULL) { 3034 return (NULL); 3035 } 3036 fam = to->sin_family; 3037 dest_is_priv = dest_is_loop = 0; 3038 /* Setup our scopes for the destination */ 3039 if (fam == AF_INET) { 3040 /* Scope based on outbound address */ 3041 if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) { 3042 dest_is_priv = 1; 3043 } else if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3044 dest_is_loop = 1; 3045 if (net != NULL) { 3046 /* mark it as local */ 3047 net->addr_is_local = 1; 3048 } 3049 } 3050 } else if (fam == AF_INET6) { 3051 /* Scope based on outbound address */ 3052 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3053 /* 3054 * If the route goes to the loopback address OR the 3055 * address is a loopback address, we are loopback 3056 * scope. But we don't use dest_is_priv (link local 3057 * addresses). 3058 */ 3059 dest_is_loop = 1; 3060 if (net != NULL) { 3061 /* mark it as local */ 3062 net->addr_is_local = 1; 3063 } 3064 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3065 dest_is_priv = 1; 3066 } 3067 } 3068 #ifdef SCTP_DEBUG 3069 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 3070 printf("Select source for:"); 3071 sctp_print_address((struct sockaddr *)to); 3072 } 3073 #endif 3074 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3075 /* 3076 * When bound to all if the address list is set it is a 3077 * negative list. Addresses being added by asconf. 3078 */ 3079 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id, 3080 dest_is_priv, 3081 dest_is_loop, 3082 non_asoc_addr_ok, 3083 fam); 3084 return (answer); 3085 } 3086 /* 3087 * Three possiblities here: 3088 * 3089 * a) stcb is NULL, which means we operate only from the list of 3090 * addresses (ifa's) bound to the endpoint and we care not about the 3091 * list. b) stcb is NOT-NULL, which means we have an assoc structure 3092 * and auto-asconf is on. This means that the list of addresses is a 3093 * NOT list. We use the list from the inp, but any listed address in 3094 * our list is NOT yet added. However if the non_asoc_addr_ok is set 3095 * we CAN use an address NOT available (i.e. being added). Its a 3096 * negative list. c) stcb is NOT-NULL, which means we have an assoc 3097 * structure and auto-asconf is off. This means that the list of 3098 * addresses is the ONLY addresses I can use.. its positive. 3099 * 3100 * Note we collapse b & c into the same function just like in the v6 3101 * address selection. 3102 */ 3103 if (stcb) { 3104 answer = sctp_choose_boundspecific_stcb(inp, stcb, net, ro, vrf_id, 3105 dest_is_priv, dest_is_loop, non_asoc_addr_ok, fam); 3106 3107 } else { 3108 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id, non_asoc_addr_ok, dest_is_priv, dest_is_loop, fam); 3109 3110 } 3111 return (answer); 3112 } 3113 3114 static int 3115 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, int cpsize) 3116 { 3117 struct cmsghdr cmh; 3118 int tlen, at; 3119 3120 tlen = SCTP_BUF_LEN(control); 3121 at = 0; 3122 /* 3123 * Independent of how many mbufs, find the c_type inside the control 3124 * structure and copy out the data. 3125 */ 3126 while (at < tlen) { 3127 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3128 /* not enough room for one more we are done. */ 3129 return (0); 3130 } 3131 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3132 if ((cmh.cmsg_len + at) > tlen) { 3133 /* 3134 * this is real messed up since there is not enough 3135 * data here to cover the cmsg header. We are done. 3136 */ 3137 return (0); 3138 } 3139 if ((cmh.cmsg_level == IPPROTO_SCTP) && 3140 (c_type == cmh.cmsg_type)) { 3141 /* found the one we want, copy it out */ 3142 at += CMSG_ALIGN(sizeof(struct cmsghdr)); 3143 if ((int)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < cpsize) { 3144 /* 3145 * space of cmsg_len after header not big 3146 * enough 3147 */ 3148 return (0); 3149 } 3150 m_copydata(control, at, cpsize, data); 3151 return (1); 3152 } else { 3153 at += CMSG_ALIGN(cmh.cmsg_len); 3154 if (cmh.cmsg_len == 0) { 3155 break; 3156 } 3157 } 3158 } 3159 /* not found */ 3160 return (0); 3161 } 3162 3163 3164 struct mbuf * 3165 sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header, 3166 int how, int allonebuf, int type) 3167 { 3168 struct mbuf *m = NULL; 3169 3170 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0); 3171 if (allonebuf) { 3172 int siz; 3173 3174 if (SCTP_BUF_IS_EXTENDED(m)) { 3175 siz = SCTP_BUF_EXTEND_SIZE(m); 3176 } else { 3177 if (want_header) 3178 siz = MHLEN; 3179 else 3180 siz = MLEN; 3181 } 3182 if (siz < space_needed) { 3183 m_freem(m); 3184 return (NULL); 3185 } 3186 } 3187 if (SCTP_BUF_NEXT(m)) { 3188 sctp_m_freem(SCTP_BUF_NEXT(m)); 3189 SCTP_BUF_NEXT(m) = NULL; 3190 } 3191 #ifdef SCTP_MBUF_LOGGING 3192 if (SCTP_BUF_IS_EXTENDED(m)) { 3193 sctp_log_mb(m, SCTP_MBUF_IALLOC); 3194 } 3195 #endif 3196 return (m); 3197 } 3198 3199 3200 static struct mbuf * 3201 sctp_add_cookie(struct sctp_inpcb *inp, struct mbuf *init, int init_offset, 3202 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in) 3203 { 3204 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret; 3205 struct sctp_state_cookie *stc; 3206 struct sctp_paramhdr *ph; 3207 uint8_t *signature; 3208 int sig_offset; 3209 uint16_t cookie_sz; 3210 3211 mret = NULL; 3212 3213 3214 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) + 3215 sizeof(struct sctp_paramhdr)), 0, M_DONTWAIT, 1, MT_DATA); 3216 if (mret == NULL) { 3217 return (NULL); 3218 } 3219 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_DONTWAIT); 3220 if (copy_init == NULL) { 3221 sctp_m_freem(mret); 3222 return (NULL); 3223 } 3224 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL, 3225 M_DONTWAIT); 3226 if (copy_initack == NULL) { 3227 sctp_m_freem(mret); 3228 sctp_m_freem(copy_init); 3229 return (NULL); 3230 } 3231 /* easy side we just drop it on the end */ 3232 ph = mtod(mret, struct sctp_paramhdr *); 3233 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) + 3234 sizeof(struct sctp_paramhdr); 3235 stc = (struct sctp_state_cookie *)((caddr_t)ph + 3236 sizeof(struct sctp_paramhdr)); 3237 ph->param_type = htons(SCTP_STATE_COOKIE); 3238 ph->param_length = 0; /* fill in at the end */ 3239 /* Fill in the stc cookie data */ 3240 *stc = *stc_in; 3241 3242 /* tack the INIT and then the INIT-ACK onto the chain */ 3243 cookie_sz = 0; 3244 m_at = mret; 3245 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3246 cookie_sz += SCTP_BUF_LEN(m_at); 3247 if (SCTP_BUF_NEXT(m_at) == NULL) { 3248 SCTP_BUF_NEXT(m_at) = copy_init; 3249 break; 3250 } 3251 } 3252 3253 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3254 cookie_sz += SCTP_BUF_LEN(m_at); 3255 if (SCTP_BUF_NEXT(m_at) == NULL) { 3256 SCTP_BUF_NEXT(m_at) = copy_initack; 3257 break; 3258 } 3259 } 3260 3261 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3262 cookie_sz += SCTP_BUF_LEN(m_at); 3263 if (SCTP_BUF_NEXT(m_at) == NULL) { 3264 break; 3265 } 3266 } 3267 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_DONTWAIT, 1, MT_DATA); 3268 if (sig == NULL) { 3269 /* no space, so free the entire chain */ 3270 sctp_m_freem(mret); 3271 return (NULL); 3272 } 3273 SCTP_BUF_LEN(sig) = 0; 3274 SCTP_BUF_NEXT(m_at) = sig; 3275 sig_offset = 0; 3276 signature = (uint8_t *) (mtod(sig, caddr_t)+sig_offset); 3277 /* Time to sign the cookie */ 3278 sctp_hmac_m(SCTP_HMAC, 3279 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)], 3280 SCTP_SECRET_SIZE, mret, sizeof(struct sctp_paramhdr), 3281 (uint8_t *) signature); 3282 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE; 3283 cookie_sz += SCTP_SIGNATURE_SIZE; 3284 3285 ph->param_length = htons(cookie_sz); 3286 return (mret); 3287 } 3288 3289 3290 static __inline uint8_t 3291 sctp_get_ect(struct sctp_tcb *stcb, 3292 struct sctp_tmit_chunk *chk) 3293 { 3294 uint8_t this_random; 3295 3296 /* Huh? */ 3297 if (sctp_ecn_enable == 0) 3298 return (0); 3299 3300 if (sctp_ecn_nonce == 0) 3301 /* no nonce, always return ECT0 */ 3302 return (SCTP_ECT0_BIT); 3303 3304 if (stcb->asoc.peer_supports_ecn_nonce == 0) { 3305 /* Peer does NOT support it, so we send a ECT0 only */ 3306 return (SCTP_ECT0_BIT); 3307 } 3308 if (chk == NULL) 3309 return (SCTP_ECT0_BIT); 3310 3311 if (((stcb->asoc.hb_random_idx == 3) && 3312 (stcb->asoc.hb_ect_randombit > 7)) || 3313 (stcb->asoc.hb_random_idx > 3)) { 3314 uint32_t rndval; 3315 3316 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 3317 memcpy(stcb->asoc.hb_random_values, &rndval, 3318 sizeof(stcb->asoc.hb_random_values)); 3319 this_random = stcb->asoc.hb_random_values[0]; 3320 stcb->asoc.hb_random_idx = 0; 3321 stcb->asoc.hb_ect_randombit = 0; 3322 } else { 3323 if (stcb->asoc.hb_ect_randombit > 7) { 3324 stcb->asoc.hb_ect_randombit = 0; 3325 stcb->asoc.hb_random_idx++; 3326 } 3327 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 3328 } 3329 if ((this_random >> stcb->asoc.hb_ect_randombit) & 0x01) { 3330 if (chk != NULL) 3331 /* ECN Nonce stuff */ 3332 chk->rec.data.ect_nonce = SCTP_ECT1_BIT; 3333 stcb->asoc.hb_ect_randombit++; 3334 return (SCTP_ECT1_BIT); 3335 } else { 3336 stcb->asoc.hb_ect_randombit++; 3337 return (SCTP_ECT0_BIT); 3338 } 3339 } 3340 3341 static int 3342 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp, 3343 struct sctp_tcb *stcb, /* may be NULL */ 3344 struct sctp_nets *net, 3345 struct sockaddr *to, 3346 struct mbuf *m, 3347 uint32_t auth_offset, 3348 struct sctp_auth_chunk *auth, 3349 int nofragment_flag, 3350 int ecn_ok, 3351 struct sctp_tmit_chunk *chk, 3352 int out_of_asoc_ok) 3353 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */ 3354 { 3355 /* 3356 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet 3357 * header WITH an SCTPHDR but no IP header, endpoint inp and sa 3358 * structure: - fill in the HMAC digest of any AUTH chunk in the 3359 * packet. - calculate and fill in the SCTP checksum. - prepend an 3360 * IP address header. - if boundall use INADDR_ANY. - if 3361 * boundspecific do source address selection. - set fragmentation 3362 * option for ipV4. - On return from IP output, check/adjust mtu 3363 * size of output interface and smallest_mtu size as well. 3364 */ 3365 /* Will need ifdefs around this */ 3366 struct mbuf *o_pak; 3367 3368 struct sctphdr *sctphdr; 3369 int packet_length; 3370 int o_flgs; 3371 uint32_t csum; 3372 int ret; 3373 unsigned int have_mtu; 3374 uint32_t vrf_id; 3375 sctp_route_t *ro; 3376 3377 3378 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) { 3379 sctp_m_freem(m); 3380 return (EFAULT); 3381 } 3382 if (stcb == NULL) { 3383 vrf_id = inp->def_vrf_id; 3384 } else { 3385 vrf_id = stcb->asoc.vrf_id; 3386 } 3387 3388 /* fill in the HMAC digest for any AUTH chunk in the packet */ 3389 if ((auth != NULL) && (stcb != NULL)) { 3390 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb); 3391 } 3392 /* Calculate the csum and fill in the length of the packet */ 3393 sctphdr = mtod(m, struct sctphdr *); 3394 have_mtu = 0; 3395 if (sctp_no_csum_on_loopback && 3396 (stcb) && 3397 (stcb->asoc.loopback_scope)) { 3398 sctphdr->checksum = 0; 3399 /* 3400 * This can probably now be taken out since my audit shows 3401 * no more bad pktlen's coming in. But we will wait a while 3402 * yet. 3403 */ 3404 packet_length = sctp_calculate_len(m); 3405 } else { 3406 sctphdr->checksum = 0; 3407 csum = sctp_calculate_sum(m, &packet_length, 0); 3408 sctphdr->checksum = csum; 3409 } 3410 3411 if (to->sa_family == AF_INET) { 3412 struct ip *ip = NULL; 3413 sctp_route_t iproute; 3414 uint8_t tos_value; 3415 3416 o_pak = SCTP_GET_HEADER_FOR_OUTPUT(sizeof(struct ip)); 3417 if (o_pak == NULL) { 3418 /* failed to prepend data, give up */ 3419 sctp_m_freem(m); 3420 return (ENOMEM); 3421 } 3422 SCTP_ALIGN_TO_END(o_pak, sizeof(struct ip)); 3423 SCTP_BUF_LEN(SCTP_HEADER_TO_CHAIN(o_pak)) = sizeof(struct ip); 3424 packet_length += sizeof(struct ip); 3425 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 3426 ip = mtod(SCTP_HEADER_TO_CHAIN(o_pak), struct ip *); 3427 ip->ip_v = IPVERSION; 3428 ip->ip_hl = (sizeof(struct ip) >> 2); 3429 if (net) { 3430 tos_value = net->tos_flowlabel & 0x000000ff; 3431 } else { 3432 tos_value = inp->ip_inp.inp.inp_ip_tos; 3433 } 3434 if (nofragment_flag) { 3435 #if defined(WITH_CONVERT_IP_OFF) || defined(__FreeBSD__) || defined(__APPLE__) 3436 ip->ip_off = IP_DF; 3437 #else 3438 ip->ip_off = htons(IP_DF); 3439 #endif 3440 } else 3441 ip->ip_off = 0; 3442 3443 3444 /* FreeBSD has a function for ip_id's */ 3445 ip->ip_id = ip_newid(); 3446 3447 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl; 3448 ip->ip_len = SCTP_HEADER_LEN(o_pak); 3449 if (stcb) { 3450 if ((stcb->asoc.ecn_allowed) && ecn_ok) { 3451 /* Enable ECN */ 3452 ip->ip_tos = ((u_char)(tos_value & 0xfc) | sctp_get_ect(stcb, chk)); 3453 } else { 3454 /* No ECN */ 3455 ip->ip_tos = (u_char)(tos_value & 0xfc); 3456 } 3457 } else { 3458 /* no association at all */ 3459 ip->ip_tos = (tos_value & 0xfc); 3460 } 3461 ip->ip_p = IPPROTO_SCTP; 3462 ip->ip_sum = 0; 3463 if (net == NULL) { 3464 ro = &iproute; 3465 memset(&iproute, 0, sizeof(iproute)); 3466 memcpy(&ro->ro_dst, to, to->sa_len); 3467 } else { 3468 ro = (sctp_route_t *) & net->ro; 3469 } 3470 /* Now the address selection part */ 3471 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr; 3472 3473 /* call the routine to select the src address */ 3474 if (net) { 3475 if (net->src_addr_selected == 0) { 3476 /* Cache the source address */ 3477 net->ro._s_addr = sctp_source_address_selection(inp, stcb, 3478 ro, net, out_of_asoc_ok, vrf_id); 3479 if (net->ro._s_addr == NULL) { 3480 /* No route to host */ 3481 goto no_route; 3482 } 3483 net->src_addr_selected = 1; 3484 } 3485 ip->ip_src = net->ro._s_addr->address.sin.sin_addr; 3486 } else { 3487 struct sctp_ifa *_lsrc; 3488 3489 _lsrc = sctp_source_address_selection(inp, 3490 stcb, ro, net, out_of_asoc_ok, vrf_id); 3491 if (_lsrc == NULL) { 3492 goto no_route; 3493 } 3494 ip->ip_src = _lsrc->address.sin.sin_addr; 3495 sctp_free_ifa(_lsrc); 3496 } 3497 3498 /* 3499 * If source address selection fails and we find no route 3500 * then the ip_output should fail as well with a 3501 * NO_ROUTE_TO_HOST type error. We probably should catch 3502 * that somewhere and abort the association right away 3503 * (assuming this is an INIT being sent). 3504 */ 3505 if ((ro->ro_rt == NULL)) { 3506 /* 3507 * src addr selection failed to find a route (or 3508 * valid source addr), so we can't get there from 3509 * here (yet)! 3510 */ 3511 no_route: 3512 #ifdef SCTP_DEBUG 3513 if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) { 3514 printf("low_level_output: dropped packet - no valid source addr\n"); 3515 if (net) { 3516 printf("Destination was "); 3517 sctp_print_address(&net->ro._l_addr.sa); 3518 } 3519 } 3520 #endif /* SCTP_DEBUG */ 3521 if (net) { 3522 if (net->dest_state & SCTP_ADDR_CONFIRMED) { 3523 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) { 3524 printf("no route takes interface %p down\n", net); 3525 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 3526 stcb, 3527 SCTP_FAILED_THRESHOLD, 3528 (void *)net); 3529 net->dest_state &= ~SCTP_ADDR_REACHABLE; 3530 net->dest_state |= SCTP_ADDR_NOT_REACHABLE; 3531 } 3532 } 3533 if (stcb) { 3534 if (net == stcb->asoc.primary_destination) { 3535 /* need a new primary */ 3536 struct sctp_nets *alt; 3537 3538 alt = sctp_find_alternate_net(stcb, net, 0); 3539 if (alt != net) { 3540 if (sctp_set_primary_addr(stcb, 3541 (struct sockaddr *)NULL, 3542 alt) == 0) { 3543 net->dest_state |= SCTP_ADDR_WAS_PRIMARY; 3544 if (net->ro._s_addr) { 3545 sctp_free_ifa(net->ro._s_addr); 3546 net->ro._s_addr = NULL; 3547 } 3548 net->src_addr_selected = 0; 3549 } 3550 } 3551 } 3552 } 3553 } 3554 sctp_m_freem(o_pak); 3555 return (EHOSTUNREACH); 3556 } else { 3557 have_mtu = ro->ro_rt->rt_ifp->if_mtu; 3558 } 3559 if (inp->sctp_socket) { 3560 o_flgs = (IP_RAWOUTPUT | (inp->sctp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST))); 3561 } else { 3562 o_flgs = IP_RAWOUTPUT; 3563 } 3564 #ifdef SCTP_DEBUG 3565 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 3566 printf("Calling ipv4 output routine from low level src addr:%x\n", 3567 (uint32_t) (ntohl(ip->ip_src.s_addr))); 3568 printf("Destination is %x\n", (uint32_t) (ntohl(ip->ip_dst.s_addr))); 3569 printf("RTP route is %p through\n", ro->ro_rt); 3570 } 3571 #endif 3572 3573 if ((have_mtu) && (net) && (have_mtu > net->mtu)) { 3574 ro->ro_rt->rt_ifp->if_mtu = net->mtu; 3575 } 3576 if (ro != &iproute) { 3577 memcpy(&iproute, ro, sizeof(*ro)); 3578 } 3579 ret = ip_output(o_pak, inp->ip_inp.inp.inp_options, 3580 ro, o_flgs, inp->ip_inp.inp.inp_moptions 3581 ,(struct inpcb *)NULL 3582 ); 3583 if ((ro->ro_rt) && (have_mtu) && (net) && (have_mtu > net->mtu)) { 3584 ro->ro_rt->rt_ifp->if_mtu = have_mtu; 3585 } 3586 SCTP_STAT_INCR(sctps_sendpackets); 3587 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 3588 if (ret) 3589 SCTP_STAT_INCR(sctps_senderrors); 3590 3591 #ifdef SCTP_DEBUG 3592 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 3593 printf("Ip output returns %d\n", ret); 3594 } 3595 #endif 3596 if (net == NULL) { 3597 /* free tempy routes */ 3598 if (ro->ro_rt) { 3599 RTFREE(ro->ro_rt); 3600 ro->ro_rt = NULL; 3601 } 3602 } else { 3603 /* PMTU check versus smallest asoc MTU goes here */ 3604 if (ro->ro_rt != NULL) { 3605 if (ro->ro_rt->rt_rmx.rmx_mtu && 3606 (stcb->asoc.smallest_mtu > ro->ro_rt->rt_rmx.rmx_mtu)) { 3607 sctp_mtu_size_reset(inp, &stcb->asoc, 3608 ro->ro_rt->rt_rmx.rmx_mtu); 3609 } 3610 } else { 3611 /* route was freed */ 3612 if (net->ro._s_addr && 3613 net->src_addr_selected) { 3614 sctp_free_ifa(net->ro._s_addr); 3615 net->ro._s_addr = NULL; 3616 } 3617 net->src_addr_selected = 0; 3618 } 3619 } 3620 return (ret); 3621 } 3622 #ifdef INET6 3623 else if (to->sa_family == AF_INET6) { 3624 uint32_t flowlabel; 3625 struct ip6_hdr *ip6h; 3626 3627 struct route_in6 ip6route; 3628 struct ifnet *ifp; 3629 u_char flowTop; 3630 uint16_t flowBottom; 3631 u_char tosBottom, tosTop; 3632 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp; 3633 struct sockaddr_in6 lsa6_storage; 3634 int prev_scope = 0; 3635 int error; 3636 u_short prev_port = 0; 3637 3638 if (net != NULL) { 3639 flowlabel = net->tos_flowlabel; 3640 } else { 3641 flowlabel = ((struct in6pcb *)inp)->in6p_flowinfo; 3642 } 3643 o_pak = SCTP_GET_HEADER_FOR_OUTPUT(sizeof(struct ip6_hdr)); 3644 if (o_pak == NULL) { 3645 /* failed to prepend data, give up */ 3646 sctp_m_freem(m); 3647 return (ENOMEM); 3648 } 3649 SCTP_ALIGN_TO_END(o_pak, sizeof(struct ip6_hdr)); 3650 3651 SCTP_BUF_LEN(SCTP_HEADER_TO_CHAIN(o_pak)) = sizeof(struct ip6_hdr); 3652 packet_length += sizeof(struct ip6_hdr); 3653 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 3654 ip6h = mtod(SCTP_HEADER_TO_CHAIN(o_pak), struct ip6_hdr *); 3655 /* 3656 * We assume here that inp_flow is in host byte order within 3657 * the TCB! 3658 */ 3659 flowBottom = flowlabel & 0x0000ffff; 3660 flowTop = ((flowlabel & 0x000f0000) >> 16); 3661 tosTop = (((flowlabel & 0xf0) >> 4) | IPV6_VERSION); 3662 /* protect *sin6 from overwrite */ 3663 sin6 = (struct sockaddr_in6 *)to; 3664 tmp = *sin6; 3665 sin6 = &tmp; 3666 3667 /* KAME hack: embed scopeid */ 3668 if (sa6_embedscope(sin6, ip6_use_defzone) != 0) 3669 return (EINVAL); 3670 if (net == NULL) { 3671 memset(&ip6route, 0, sizeof(ip6route)); 3672 ro = (sctp_route_t *) & ip6route; 3673 memcpy(&ro->ro_dst, sin6, sin6->sin6_len); 3674 } else { 3675 ro = (sctp_route_t *) & net->ro; 3676 } 3677 if (stcb != NULL) { 3678 if ((stcb->asoc.ecn_allowed) && ecn_ok) { 3679 /* Enable ECN */ 3680 tosBottom = (((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) | sctp_get_ect(stcb, chk)) << 4); 3681 } else { 3682 /* No ECN */ 3683 tosBottom = ((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) << 4); 3684 } 3685 } else { 3686 /* we could get no asoc if it is a O-O-T-B packet */ 3687 tosBottom = ((((struct in6pcb *)inp)->in6p_flowinfo & 0x0c) << 4); 3688 } 3689 ip6h->ip6_flow = htonl(((tosTop << 24) | ((tosBottom | flowTop) << 16) | flowBottom)); 3690 ip6h->ip6_nxt = IPPROTO_SCTP; 3691 ip6h->ip6_plen = (SCTP_HEADER_LEN(o_pak) - sizeof(struct ip6_hdr)); 3692 ip6h->ip6_dst = sin6->sin6_addr; 3693 3694 /* 3695 * Add SRC address selection here: we can only reuse to a 3696 * limited degree the kame src-addr-sel, since we can try 3697 * their selection but it may not be bound. 3698 */ 3699 bzero(&lsa6_tmp, sizeof(lsa6_tmp)); 3700 lsa6_tmp.sin6_family = AF_INET6; 3701 lsa6_tmp.sin6_len = sizeof(lsa6_tmp); 3702 lsa6 = &lsa6_tmp; 3703 if (net) { 3704 if (net->src_addr_selected == 0) { 3705 /* Cache the source address */ 3706 net->ro._s_addr = sctp_source_address_selection(inp, 3707 stcb, 3708 ro, 3709 net, 3710 out_of_asoc_ok, 3711 vrf_id); 3712 if (net->ro._s_addr == NULL) { 3713 #ifdef SCTP_DEBUG 3714 printf("V6:No route to host\n"); 3715 #endif 3716 goto no_route; 3717 } 3718 net->src_addr_selected = 1; 3719 } 3720 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr; 3721 } else { 3722 struct sctp_ifa *_lsrc; 3723 3724 _lsrc = sctp_source_address_selection(inp, stcb, ro, net, out_of_asoc_ok, vrf_id); 3725 if (_lsrc == NULL) { 3726 goto no_route; 3727 } 3728 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr; 3729 sctp_free_ifa(_lsrc); 3730 } 3731 lsa6->sin6_port = inp->sctp_lport; 3732 3733 if ((ro->ro_rt == NULL)) { 3734 /* 3735 * src addr selection failed to find a route (or 3736 * valid source addr), so we can't get there from 3737 * here! 3738 */ 3739 goto no_route; 3740 } 3741 /* 3742 * XXX: sa6 may not have a valid sin6_scope_id in the 3743 * non-SCOPEDROUTING case. 3744 */ 3745 bzero(&lsa6_storage, sizeof(lsa6_storage)); 3746 lsa6_storage.sin6_family = AF_INET6; 3747 lsa6_storage.sin6_len = sizeof(lsa6_storage); 3748 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) { 3749 sctp_m_freem(o_pak); 3750 return (error); 3751 } 3752 /* XXX */ 3753 lsa6_storage.sin6_addr = lsa6->sin6_addr; 3754 lsa6_storage.sin6_port = inp->sctp_lport; 3755 lsa6 = &lsa6_storage; 3756 ip6h->ip6_src = lsa6->sin6_addr; 3757 3758 /* 3759 * We set the hop limit now since there is a good chance 3760 * that our ro pointer is now filled 3761 */ 3762 ip6h->ip6_hlim = in6_selecthlim((struct in6pcb *)&inp->ip_inp.inp, 3763 (ro ? 3764 (ro->ro_rt ? (ro->ro_rt->rt_ifp) : (NULL)) : 3765 (NULL))); 3766 o_flgs = 0; 3767 ifp = ro->ro_rt->rt_ifp; 3768 #ifdef SCTP_DEBUG 3769 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 3770 /* Copy to be sure something bad is not happening */ 3771 sin6->sin6_addr = ip6h->ip6_dst; 3772 lsa6->sin6_addr = ip6h->ip6_src; 3773 3774 printf("Calling ipv6 output routine from low level\n"); 3775 printf("src: "); 3776 sctp_print_address((struct sockaddr *)lsa6); 3777 printf("dst: "); 3778 sctp_print_address((struct sockaddr *)sin6); 3779 } 3780 #endif /* SCTP_DEBUG */ 3781 if (net) { 3782 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3783 /* preserve the port and scope for link local send */ 3784 prev_scope = sin6->sin6_scope_id; 3785 prev_port = sin6->sin6_port; 3786 } 3787 ret = ip6_output(o_pak, ((struct in6pcb *)inp)->in6p_outputopts, 3788 (struct route_in6 *)ro, 3789 o_flgs, 3790 ((struct in6pcb *)inp)->in6p_moptions, 3791 &ifp 3792 ,NULL 3793 ); 3794 if (net) { 3795 /* for link local this must be done */ 3796 sin6->sin6_scope_id = prev_scope; 3797 sin6->sin6_port = prev_port; 3798 } 3799 #ifdef SCTP_DEBUG 3800 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 3801 printf("return from send is %d\n", ret); 3802 } 3803 #endif /* SCTP_DEBUG_OUTPUT */ 3804 SCTP_STAT_INCR(sctps_sendpackets); 3805 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 3806 if (ret) { 3807 SCTP_STAT_INCR(sctps_senderrors); 3808 } 3809 if (net == NULL) { 3810 /* Now if we had a temp route free it */ 3811 if (ro->ro_rt) { 3812 RTFREE(ro->ro_rt); 3813 } 3814 } else { 3815 /* PMTU check versus smallest asoc MTU goes here */ 3816 if (ro->ro_rt == NULL) { 3817 /* Route was freed */ 3818 3819 if (net->ro._s_addr && 3820 net->src_addr_selected) { 3821 sctp_free_ifa(net->ro._s_addr); 3822 net->ro._s_addr = NULL; 3823 } 3824 net->src_addr_selected = 0; 3825 } 3826 if (ro->ro_rt != NULL) { 3827 if (ro->ro_rt->rt_rmx.rmx_mtu && 3828 (stcb->asoc.smallest_mtu > ro->ro_rt->rt_rmx.rmx_mtu)) { 3829 sctp_mtu_size_reset(inp, 3830 &stcb->asoc, 3831 ro->ro_rt->rt_rmx.rmx_mtu); 3832 } 3833 } else if (ifp) { 3834 if (ND_IFINFO(ifp)->linkmtu && 3835 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) { 3836 sctp_mtu_size_reset(inp, 3837 &stcb->asoc, 3838 ND_IFINFO(ifp)->linkmtu); 3839 } 3840 } 3841 } 3842 return (ret); 3843 } 3844 #endif 3845 else { 3846 #ifdef SCTP_DEBUG 3847 if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) { 3848 printf("Unknown protocol (TSNH) type %d\n", ((struct sockaddr *)to)->sa_family); 3849 } 3850 #endif 3851 sctp_m_freem(m); 3852 return (EFAULT); 3853 } 3854 } 3855 3856 3857 void 3858 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 3859 { 3860 struct mbuf *m, *m_at, *mp_last; 3861 struct sctp_nets *net; 3862 struct sctp_init_msg *initm; 3863 struct sctp_supported_addr_param *sup_addr; 3864 struct sctp_ecn_supported_param *ecn; 3865 struct sctp_prsctp_supported_param *prsctp; 3866 struct sctp_ecn_nonce_supported_param *ecn_nonce; 3867 struct sctp_supported_chunk_types_param *pr_supported; 3868 int cnt_inits_to = 0; 3869 int padval, ret; 3870 int num_ext; 3871 int p_len; 3872 3873 /* INIT's always go to the primary (and usually ONLY address) */ 3874 mp_last = NULL; 3875 net = stcb->asoc.primary_destination; 3876 if (net == NULL) { 3877 net = TAILQ_FIRST(&stcb->asoc.nets); 3878 if (net == NULL) { 3879 /* TSNH */ 3880 return; 3881 } 3882 /* we confirm any address we send an INIT to */ 3883 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 3884 sctp_set_primary_addr(stcb, NULL, net); 3885 } else { 3886 /* we confirm any address we send an INIT to */ 3887 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 3888 } 3889 #ifdef SCTP_DEBUG 3890 if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) { 3891 printf("Sending INIT\n"); 3892 } 3893 #endif 3894 if (((struct sockaddr *)&(net->ro._l_addr))->sa_family == AF_INET6) { 3895 /* 3896 * special hook, if we are sending to link local it will not 3897 * show up in our private address count. 3898 */ 3899 struct sockaddr_in6 *sin6l; 3900 3901 sin6l = &net->ro._l_addr.sin6; 3902 if (IN6_IS_ADDR_LINKLOCAL(&sin6l->sin6_addr)) 3903 cnt_inits_to = 1; 3904 } 3905 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 3906 /* This case should not happen */ 3907 return; 3908 } 3909 /* start the INIT timer */ 3910 if (sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net)) { 3911 /* we are hosed since I can't start the INIT timer? */ 3912 return; 3913 } 3914 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA); 3915 if (m == NULL) { 3916 /* No memory, INIT timer will re-attempt. */ 3917 return; 3918 } 3919 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_msg); 3920 /* Now lets put the SCTP header in place */ 3921 initm = mtod(m, struct sctp_init_msg *); 3922 initm->sh.src_port = inp->sctp_lport; 3923 initm->sh.dest_port = stcb->rport; 3924 initm->sh.v_tag = 0; 3925 initm->sh.checksum = 0; /* calculate later */ 3926 /* now the chunk header */ 3927 initm->msg.ch.chunk_type = SCTP_INITIATION; 3928 initm->msg.ch.chunk_flags = 0; 3929 /* fill in later from mbuf we build */ 3930 initm->msg.ch.chunk_length = 0; 3931 /* place in my tag */ 3932 initm->msg.init.initiate_tag = htonl(stcb->asoc.my_vtag); 3933 /* set up some of the credits. */ 3934 initm->msg.init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(inp->sctp_socket), 3935 SCTP_MINIMAL_RWND)); 3936 3937 initm->msg.init.num_outbound_streams = htons(stcb->asoc.pre_open_streams); 3938 initm->msg.init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams); 3939 initm->msg.init.initial_tsn = htonl(stcb->asoc.init_seq_number); 3940 /* now the address restriction */ 3941 sup_addr = (struct sctp_supported_addr_param *)((caddr_t)initm + 3942 sizeof(*initm)); 3943 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE); 3944 /* we support 2 types IPv6/IPv4 */ 3945 sup_addr->ph.param_length = htons(sizeof(*sup_addr) + 3946 sizeof(uint16_t)); 3947 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS); 3948 sup_addr->addr_type[1] = htons(SCTP_IPV6_ADDRESS); 3949 SCTP_BUF_LEN(m) += sizeof(*sup_addr) + sizeof(uint16_t); 3950 3951 if (inp->sctp_ep.adaptation_layer_indicator) { 3952 struct sctp_adaptation_layer_indication *ali; 3953 3954 ali = (struct sctp_adaptation_layer_indication *)( 3955 (caddr_t)sup_addr + sizeof(*sup_addr) + sizeof(uint16_t)); 3956 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 3957 ali->ph.param_length = htons(sizeof(*ali)); 3958 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator); 3959 SCTP_BUF_LEN(m) += sizeof(*ali); 3960 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + 3961 sizeof(*ali)); 3962 } else { 3963 ecn = (struct sctp_ecn_supported_param *)((caddr_t)sup_addr + 3964 sizeof(*sup_addr) + sizeof(uint16_t)); 3965 } 3966 3967 /* now any cookie time extensions */ 3968 if (stcb->asoc.cookie_preserve_req) { 3969 struct sctp_cookie_perserve_param *cookie_preserve; 3970 3971 cookie_preserve = (struct sctp_cookie_perserve_param *)(ecn); 3972 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE); 3973 cookie_preserve->ph.param_length = htons( 3974 sizeof(*cookie_preserve)); 3975 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req); 3976 SCTP_BUF_LEN(m) += sizeof(*cookie_preserve); 3977 ecn = (struct sctp_ecn_supported_param *)( 3978 (caddr_t)cookie_preserve + sizeof(*cookie_preserve)); 3979 stcb->asoc.cookie_preserve_req = 0; 3980 } 3981 /* ECN parameter */ 3982 if (sctp_ecn_enable == 1) { 3983 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE); 3984 ecn->ph.param_length = htons(sizeof(*ecn)); 3985 SCTP_BUF_LEN(m) += sizeof(*ecn); 3986 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn + 3987 sizeof(*ecn)); 3988 } else { 3989 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn); 3990 } 3991 /* And now tell the peer we do pr-sctp */ 3992 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED); 3993 prsctp->ph.param_length = htons(sizeof(*prsctp)); 3994 SCTP_BUF_LEN(m) += sizeof(*prsctp); 3995 3996 /* And now tell the peer we do all the extensions */ 3997 pr_supported = (struct sctp_supported_chunk_types_param *) 3998 ((caddr_t)prsctp + sizeof(*prsctp)); 3999 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 4000 num_ext = 0; 4001 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 4002 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 4003 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 4004 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 4005 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 4006 if (!sctp_auth_disable) 4007 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 4008 p_len = sizeof(*pr_supported) + num_ext; 4009 pr_supported->ph.param_length = htons(p_len); 4010 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len); 4011 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4012 4013 /* ECN nonce: And now tell the peer we support ECN nonce */ 4014 if (sctp_ecn_nonce) { 4015 ecn_nonce = (struct sctp_ecn_nonce_supported_param *) 4016 ((caddr_t)pr_supported + SCTP_SIZE32(p_len)); 4017 ecn_nonce->ph.param_type = htons(SCTP_ECN_NONCE_SUPPORTED); 4018 ecn_nonce->ph.param_length = htons(sizeof(*ecn_nonce)); 4019 SCTP_BUF_LEN(m) += sizeof(*ecn_nonce); 4020 } 4021 /* add authentication parameters */ 4022 if (!sctp_auth_disable) { 4023 struct sctp_auth_random *random; 4024 struct sctp_auth_hmac_algo *hmacs; 4025 struct sctp_auth_chunk_list *chunks; 4026 4027 /* attach RANDOM parameter, if available */ 4028 if (stcb->asoc.authinfo.random != NULL) { 4029 random = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 4030 p_len = sizeof(*random) + stcb->asoc.authinfo.random_len; 4031 #ifdef SCTP_AUTH_DRAFT_04 4032 random->ph.param_type = htons(SCTP_RANDOM); 4033 random->ph.param_length = htons(p_len); 4034 bcopy(stcb->asoc.authinfo.random->key, 4035 random->random_data, 4036 stcb->asoc.authinfo.random_len); 4037 #else 4038 /* random key already contains the header */ 4039 bcopy(stcb->asoc.authinfo.random->key, random, p_len); 4040 #endif 4041 /* zero out any padding required */ 4042 bzero((caddr_t)random + p_len, SCTP_SIZE32(p_len) - p_len); 4043 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4044 } 4045 /* add HMAC_ALGO parameter */ 4046 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 4047 p_len = sctp_serialize_hmaclist(stcb->asoc.local_hmacs, 4048 (uint8_t *) hmacs->hmac_ids); 4049 if (p_len > 0) { 4050 p_len += sizeof(*hmacs); 4051 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 4052 hmacs->ph.param_length = htons(p_len); 4053 /* zero out any padding required */ 4054 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len); 4055 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4056 } 4057 /* add CHUNKS parameter */ 4058 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 4059 p_len = sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, 4060 chunks->chunk_types); 4061 if (p_len > 0) { 4062 p_len += sizeof(*chunks); 4063 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 4064 chunks->ph.param_length = htons(p_len); 4065 /* zero out any padding required */ 4066 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len); 4067 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4068 } 4069 } 4070 m_at = m; 4071 /* now the addresses */ 4072 { 4073 struct sctp_scoping scp; 4074 4075 /* 4076 * To optimize this we could put the scoping stuff into a 4077 * structure and remove the individual uint8's from the 4078 * assoc structure. Then we could just sifa in the address 4079 * within the stcb.. but for now this is a quick hack to get 4080 * the address stuff teased apart. 4081 */ 4082 scp.ipv4_addr_legal = stcb->asoc.ipv4_addr_legal; 4083 scp.ipv6_addr_legal = stcb->asoc.ipv6_addr_legal; 4084 scp.loopback_scope = stcb->asoc.loopback_scope; 4085 scp.ipv4_local_scope = stcb->asoc.ipv4_local_scope; 4086 scp.local_scope = stcb->asoc.local_scope; 4087 scp.site_scope = stcb->asoc.site_scope; 4088 4089 m_at = sctp_add_addresses_to_i_ia(inp, &scp, m_at, cnt_inits_to); 4090 } 4091 4092 4093 /* calulate the size and update pkt header and chunk header */ 4094 p_len = 0; 4095 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 4096 if (SCTP_BUF_NEXT(m_at) == NULL) 4097 mp_last = m_at; 4098 p_len += SCTP_BUF_LEN(m_at); 4099 } 4100 initm->msg.ch.chunk_length = htons((p_len - sizeof(struct sctphdr))); 4101 /* 4102 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return 4103 * here since the timer will drive a retranmission. 4104 */ 4105 4106 /* I don't expect this to execute but we will be safe here */ 4107 padval = p_len % 4; 4108 if ((padval) && (mp_last)) { 4109 /* 4110 * The compiler worries that mp_last may not be set even 4111 * though I think it is impossible :-> however we add 4112 * mp_last here just in case. 4113 */ 4114 int ret; 4115 4116 ret = sctp_add_pad_tombuf(mp_last, (4 - padval)); 4117 if (ret) { 4118 /* Houston we have a problem, no space */ 4119 sctp_m_freem(m); 4120 return; 4121 } 4122 p_len += padval; 4123 } 4124 ret = sctp_lowlevel_chunk_output(inp, stcb, net, 4125 (struct sockaddr *)&net->ro._l_addr, 4126 m, 0, NULL, 0, 0, NULL, 0); 4127 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 4128 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net); 4129 SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 4130 } 4131 4132 struct mbuf * 4133 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt, 4134 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp) 4135 { 4136 /* 4137 * Given a mbuf containing an INIT or INIT-ACK with the param_offset 4138 * being equal to the beginning of the params i.e. (iphlen + 4139 * sizeof(struct sctp_init_msg) parse through the parameters to the 4140 * end of the mbuf verifying that all parameters are known. 4141 * 4142 * For unknown parameters build and return a mbuf with 4143 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop 4144 * processing this chunk stop, and set *abort_processing to 1. 4145 * 4146 * By having param_offset be pre-set to where parameters begin it is 4147 * hoped that this routine may be reused in the future by new 4148 * features. 4149 */ 4150 struct sctp_paramhdr *phdr, params; 4151 4152 struct mbuf *mat, *op_err; 4153 char tempbuf[SCTP_CHUNK_BUFFER_SIZE]; 4154 int at, limit, pad_needed; 4155 uint16_t ptype, plen; 4156 int err_at; 4157 4158 *abort_processing = 0; 4159 mat = in_initpkt; 4160 err_at = 0; 4161 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk); 4162 at = param_offset; 4163 op_err = NULL; 4164 4165 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 4166 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) { 4167 ptype = ntohs(phdr->param_type); 4168 plen = ntohs(phdr->param_length); 4169 limit -= SCTP_SIZE32(plen); 4170 if (plen < sizeof(struct sctp_paramhdr)) { 4171 #ifdef SCTP_DEBUG 4172 if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) { 4173 printf("sctp_output.c:Impossible length in parameter < %d\n", plen); 4174 } 4175 #endif 4176 *abort_processing = 1; 4177 break; 4178 } 4179 /* 4180 * All parameters for all chunks that we know/understand are 4181 * listed here. We process them other places and make 4182 * appropriate stop actions per the upper bits. However this 4183 * is the generic routine processor's can call to get back 4184 * an operr.. to either incorporate (init-ack) or send. 4185 */ 4186 if ((ptype == SCTP_HEARTBEAT_INFO) || 4187 (ptype == SCTP_IPV4_ADDRESS) || 4188 (ptype == SCTP_IPV6_ADDRESS) || 4189 (ptype == SCTP_STATE_COOKIE) || 4190 (ptype == SCTP_UNRECOG_PARAM) || 4191 (ptype == SCTP_COOKIE_PRESERVE) || 4192 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 4193 (ptype == SCTP_PRSCTP_SUPPORTED) || 4194 (ptype == SCTP_ADD_IP_ADDRESS) || 4195 (ptype == SCTP_DEL_IP_ADDRESS) || 4196 (ptype == SCTP_ECN_CAPABLE) || 4197 (ptype == SCTP_ULP_ADAPTATION) || 4198 (ptype == SCTP_ERROR_CAUSE_IND) || 4199 (ptype == SCTP_RANDOM) || 4200 (ptype == SCTP_CHUNK_LIST) || 4201 (ptype == SCTP_CHUNK_LIST) || 4202 (ptype == SCTP_SET_PRIM_ADDR) || 4203 (ptype == SCTP_SUCCESS_REPORT) || 4204 (ptype == SCTP_ULP_ADAPTATION) || 4205 (ptype == SCTP_SUPPORTED_CHUNK_EXT) || 4206 (ptype == SCTP_ECN_NONCE_SUPPORTED) 4207 ) { 4208 /* no skip it */ 4209 at += SCTP_SIZE32(plen); 4210 } else if (ptype == SCTP_HOSTNAME_ADDRESS) { 4211 /* We can NOT handle HOST NAME addresses!! */ 4212 int l_len; 4213 4214 #ifdef SCTP_DEBUG 4215 if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) { 4216 printf("Can't handle hostname addresses.. abort processing\n"); 4217 } 4218 #endif 4219 *abort_processing = 1; 4220 if (op_err == NULL) { 4221 /* Ok need to try to get a mbuf */ 4222 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 4223 l_len += plen; 4224 l_len += sizeof(struct sctp_paramhdr); 4225 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA); 4226 if (op_err) { 4227 SCTP_BUF_LEN(op_err) = 0; 4228 /* 4229 * pre-reserve space for ip and sctp 4230 * header and chunk hdr 4231 */ 4232 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 4233 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 4234 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 4235 } 4236 } 4237 if (op_err) { 4238 /* If we have space */ 4239 struct sctp_paramhdr s; 4240 4241 if (err_at % 4) { 4242 uint32_t cpthis = 0; 4243 4244 pad_needed = 4 - (err_at % 4); 4245 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 4246 err_at += pad_needed; 4247 } 4248 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR); 4249 s.param_length = htons(sizeof(s) + plen); 4250 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 4251 err_at += sizeof(s); 4252 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen); 4253 if (phdr == NULL) { 4254 sctp_m_freem(op_err); 4255 /* 4256 * we are out of memory but we still 4257 * need to have a look at what to do 4258 * (the system is in trouble 4259 * though). 4260 */ 4261 return (NULL); 4262 } 4263 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 4264 err_at += plen; 4265 } 4266 return (op_err); 4267 } else { 4268 /* 4269 * we do not recognize the parameter figure out what 4270 * we do. 4271 */ 4272 if ((ptype & 0x4000) == 0x4000) { 4273 /* Report bit is set?? */ 4274 if (op_err == NULL) { 4275 int l_len; 4276 4277 /* Ok need to try to get an mbuf */ 4278 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 4279 l_len += plen; 4280 l_len += sizeof(struct sctp_paramhdr); 4281 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA); 4282 if (op_err) { 4283 SCTP_BUF_LEN(op_err) = 0; 4284 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 4285 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 4286 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 4287 } 4288 } 4289 if (op_err) { 4290 /* If we have space */ 4291 struct sctp_paramhdr s; 4292 4293 if (err_at % 4) { 4294 uint32_t cpthis = 0; 4295 4296 pad_needed = 4 - (err_at % 4); 4297 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 4298 err_at += pad_needed; 4299 } 4300 s.param_type = htons(SCTP_UNRECOG_PARAM); 4301 s.param_length = htons(sizeof(s) + plen); 4302 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 4303 err_at += sizeof(s); 4304 if (plen > sizeof(tempbuf)) { 4305 plen = sizeof(tempbuf); 4306 } 4307 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen); 4308 if (phdr == NULL) { 4309 sctp_m_freem(op_err); 4310 /* 4311 * we are out of memory but 4312 * we still need to have a 4313 * look at what to do (the 4314 * system is in trouble 4315 * though). 4316 */ 4317 goto more_processing; 4318 } 4319 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 4320 err_at += plen; 4321 } 4322 } 4323 more_processing: 4324 if ((ptype & 0x8000) == 0x0000) { 4325 return (op_err); 4326 } else { 4327 /* skip this chunk and continue processing */ 4328 at += SCTP_SIZE32(plen); 4329 } 4330 4331 } 4332 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 4333 } 4334 return (op_err); 4335 } 4336 4337 static int 4338 sctp_are_there_new_addresses(struct sctp_association *asoc, 4339 struct mbuf *in_initpkt, int iphlen, int offset) 4340 { 4341 /* 4342 * Given a INIT packet, look through the packet to verify that there 4343 * are NO new addresses. As we go through the parameters add reports 4344 * of any un-understood parameters that require an error. Also we 4345 * must return (1) to drop the packet if we see a un-understood 4346 * parameter that tells us to drop the chunk. 4347 */ 4348 struct sockaddr_in sin4, *sa4; 4349 struct sockaddr_in6 sin6, *sa6; 4350 struct sockaddr *sa_touse; 4351 struct sockaddr *sa; 4352 struct sctp_paramhdr *phdr, params; 4353 struct ip *iph; 4354 struct mbuf *mat; 4355 uint16_t ptype, plen; 4356 int err_at; 4357 uint8_t fnd; 4358 struct sctp_nets *net; 4359 4360 memset(&sin4, 0, sizeof(sin4)); 4361 memset(&sin6, 0, sizeof(sin6)); 4362 sin4.sin_family = AF_INET; 4363 sin4.sin_len = sizeof(sin4); 4364 sin6.sin6_family = AF_INET6; 4365 sin6.sin6_len = sizeof(sin6); 4366 4367 sa_touse = NULL; 4368 /* First what about the src address of the pkt ? */ 4369 iph = mtod(in_initpkt, struct ip *); 4370 if (iph->ip_v == IPVERSION) { 4371 /* source addr is IPv4 */ 4372 sin4.sin_addr = iph->ip_src; 4373 sa_touse = (struct sockaddr *)&sin4; 4374 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 4375 /* source addr is IPv6 */ 4376 struct ip6_hdr *ip6h; 4377 4378 ip6h = mtod(in_initpkt, struct ip6_hdr *); 4379 sin6.sin6_addr = ip6h->ip6_src; 4380 sa_touse = (struct sockaddr *)&sin6; 4381 } else { 4382 return (1); 4383 } 4384 4385 fnd = 0; 4386 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4387 sa = (struct sockaddr *)&net->ro._l_addr; 4388 if (sa->sa_family == sa_touse->sa_family) { 4389 if (sa->sa_family == AF_INET) { 4390 sa4 = (struct sockaddr_in *)sa; 4391 if (sa4->sin_addr.s_addr == 4392 sin4.sin_addr.s_addr) { 4393 fnd = 1; 4394 break; 4395 } 4396 } else if (sa->sa_family == AF_INET6) { 4397 sa6 = (struct sockaddr_in6 *)sa; 4398 if (SCTP6_ARE_ADDR_EQUAL(&sa6->sin6_addr, 4399 &sin6.sin6_addr)) { 4400 fnd = 1; 4401 break; 4402 } 4403 } 4404 } 4405 } 4406 if (fnd == 0) { 4407 /* New address added! no need to look futher. */ 4408 return (1); 4409 } 4410 /* Ok so far lets munge through the rest of the packet */ 4411 mat = in_initpkt; 4412 err_at = 0; 4413 sa_touse = NULL; 4414 offset += sizeof(struct sctp_init_chunk); 4415 phdr = sctp_get_next_param(mat, offset, ¶ms, sizeof(params)); 4416 while (phdr) { 4417 ptype = ntohs(phdr->param_type); 4418 plen = ntohs(phdr->param_length); 4419 if (ptype == SCTP_IPV4_ADDRESS) { 4420 struct sctp_ipv4addr_param *p4, p4_buf; 4421 4422 phdr = sctp_get_next_param(mat, offset, 4423 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 4424 if (plen != sizeof(struct sctp_ipv4addr_param) || 4425 phdr == NULL) { 4426 return (1); 4427 } 4428 p4 = (struct sctp_ipv4addr_param *)phdr; 4429 sin4.sin_addr.s_addr = p4->addr; 4430 sa_touse = (struct sockaddr *)&sin4; 4431 } else if (ptype == SCTP_IPV6_ADDRESS) { 4432 struct sctp_ipv6addr_param *p6, p6_buf; 4433 4434 phdr = sctp_get_next_param(mat, offset, 4435 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 4436 if (plen != sizeof(struct sctp_ipv6addr_param) || 4437 phdr == NULL) { 4438 return (1); 4439 } 4440 p6 = (struct sctp_ipv6addr_param *)phdr; 4441 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 4442 sizeof(p6->addr)); 4443 sa_touse = (struct sockaddr *)&sin4; 4444 } 4445 if (sa_touse) { 4446 /* ok, sa_touse points to one to check */ 4447 fnd = 0; 4448 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4449 sa = (struct sockaddr *)&net->ro._l_addr; 4450 if (sa->sa_family != sa_touse->sa_family) { 4451 continue; 4452 } 4453 if (sa->sa_family == AF_INET) { 4454 sa4 = (struct sockaddr_in *)sa; 4455 if (sa4->sin_addr.s_addr == 4456 sin4.sin_addr.s_addr) { 4457 fnd = 1; 4458 break; 4459 } 4460 } else if (sa->sa_family == AF_INET6) { 4461 sa6 = (struct sockaddr_in6 *)sa; 4462 if (SCTP6_ARE_ADDR_EQUAL( 4463 &sa6->sin6_addr, &sin6.sin6_addr)) { 4464 fnd = 1; 4465 break; 4466 } 4467 } 4468 } 4469 if (!fnd) { 4470 /* New addr added! no need to look further */ 4471 return (1); 4472 } 4473 } 4474 offset += SCTP_SIZE32(plen); 4475 phdr = sctp_get_next_param(mat, offset, ¶ms, sizeof(params)); 4476 } 4477 return (0); 4478 } 4479 4480 /* 4481 * Given a MBUF chain that was sent into us containing an INIT. Build a 4482 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done 4483 * a pullup to include IPv6/4header, SCTP header and initial part of INIT 4484 * message (i.e. the struct sctp_init_msg). 4485 */ 4486 void 4487 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 4488 struct mbuf *init_pkt, int iphlen, int offset, struct sctphdr *sh, 4489 struct sctp_init_chunk *init_chk) 4490 { 4491 struct sctp_association *asoc; 4492 struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last; 4493 struct sctp_init_msg *initackm_out; 4494 struct sctp_ecn_supported_param *ecn; 4495 struct sctp_prsctp_supported_param *prsctp; 4496 struct sctp_ecn_nonce_supported_param *ecn_nonce; 4497 struct sctp_supported_chunk_types_param *pr_supported; 4498 struct sockaddr_storage store; 4499 struct sockaddr_in *sin; 4500 struct sockaddr_in6 *sin6; 4501 sctp_route_t *ro; 4502 struct ip *iph; 4503 struct ip6_hdr *ip6; 4504 struct sockaddr *to; 4505 struct sctp_state_cookie stc; 4506 struct sctp_nets *net = NULL; 4507 int cnt_inits_to = 0; 4508 uint16_t his_limit, i_want; 4509 int abort_flag, padval, sz_of; 4510 int num_ext; 4511 int p_len; 4512 uint32_t vrf_id; 4513 4514 if (stcb) { 4515 asoc = &stcb->asoc; 4516 vrf_id = asoc->vrf_id; 4517 } else { 4518 vrf_id = inp->def_vrf_id; 4519 asoc = NULL; 4520 } 4521 mp_last = NULL; 4522 if ((asoc != NULL) && 4523 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 4524 (sctp_are_there_new_addresses(asoc, init_pkt, iphlen, offset))) { 4525 /* new addresses, out of here in non-cookie-wait states */ 4526 /* 4527 * Send a ABORT, we don't add the new address error clause 4528 * though we even set the T bit and copy in the 0 tag.. this 4529 * looks no different than if no listener was present. 4530 */ 4531 sctp_send_abort(init_pkt, iphlen, sh, 0, NULL); 4532 return; 4533 } 4534 abort_flag = 0; 4535 op_err = sctp_arethere_unrecognized_parameters(init_pkt, 4536 (offset + sizeof(struct sctp_init_chunk)), 4537 &abort_flag, (struct sctp_chunkhdr *)init_chk); 4538 if (abort_flag) { 4539 sctp_send_abort(init_pkt, iphlen, sh, init_chk->init.initiate_tag, op_err); 4540 return; 4541 } 4542 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 4543 if (m == NULL) { 4544 /* No memory, INIT timer will re-attempt. */ 4545 if (op_err) 4546 sctp_m_freem(op_err); 4547 return; 4548 } 4549 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_msg); 4550 4551 /* the time I built cookie */ 4552 SCTP_GETTIME_TIMEVAL(&stc.time_entered); 4553 4554 /* populate any tie tags */ 4555 if (asoc != NULL) { 4556 /* unlock before tag selections */ 4557 stc.tie_tag_my_vtag = asoc->my_vtag_nonce; 4558 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce; 4559 stc.cookie_life = asoc->cookie_life; 4560 net = asoc->primary_destination; 4561 } else { 4562 stc.tie_tag_my_vtag = 0; 4563 stc.tie_tag_peer_vtag = 0; 4564 /* life I will award this cookie */ 4565 stc.cookie_life = inp->sctp_ep.def_cookie_life; 4566 } 4567 4568 /* copy in the ports for later check */ 4569 stc.myport = sh->dest_port; 4570 stc.peerport = sh->src_port; 4571 4572 /* 4573 * If we wanted to honor cookie life extentions, we would add to 4574 * stc.cookie_life. For now we should NOT honor any extension 4575 */ 4576 stc.site_scope = stc.local_scope = stc.loopback_scope = 0; 4577 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 4578 struct inpcb *in_inp; 4579 4580 /* Its a V6 socket */ 4581 in_inp = (struct inpcb *)inp; 4582 stc.ipv6_addr_legal = 1; 4583 /* Now look at the binding flag to see if V4 will be legal */ 4584 if (SCTP_IPV6_V6ONLY(in_inp) == 0) { 4585 stc.ipv4_addr_legal = 1; 4586 } else { 4587 /* V4 addresses are NOT legal on the association */ 4588 stc.ipv4_addr_legal = 0; 4589 } 4590 } else { 4591 /* Its a V4 socket, no - V6 */ 4592 stc.ipv4_addr_legal = 1; 4593 stc.ipv6_addr_legal = 0; 4594 } 4595 4596 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 4597 stc.ipv4_scope = 1; 4598 #else 4599 stc.ipv4_scope = 0; 4600 #endif 4601 /* now for scope setup */ 4602 memset((caddr_t)&store, 0, sizeof(store)); 4603 sin = (struct sockaddr_in *)&store; 4604 sin6 = (struct sockaddr_in6 *)&store; 4605 if (net == NULL) { 4606 to = (struct sockaddr *)&store; 4607 iph = mtod(init_pkt, struct ip *); 4608 if (iph->ip_v == IPVERSION) { 4609 struct sctp_ifa *addr; 4610 sctp_route_t iproute; 4611 4612 sin->sin_family = AF_INET; 4613 sin->sin_len = sizeof(struct sockaddr_in); 4614 sin->sin_port = sh->src_port; 4615 sin->sin_addr = iph->ip_src; 4616 /* lookup address */ 4617 stc.address[0] = sin->sin_addr.s_addr; 4618 stc.address[1] = 0; 4619 stc.address[2] = 0; 4620 stc.address[3] = 0; 4621 stc.addr_type = SCTP_IPV4_ADDRESS; 4622 /* local from address */ 4623 memset(&iproute, 0, sizeof(iproute)); 4624 ro = &iproute; 4625 memcpy(&ro->ro_dst, sin, sizeof(*sin)); 4626 addr = sctp_source_address_selection(inp, NULL, 4627 ro, NULL, 0, vrf_id); 4628 if (addr == NULL) 4629 return; 4630 4631 if (ro->ro_rt) { 4632 RTFREE(ro->ro_rt); 4633 ro->ro_rt = NULL; 4634 } 4635 stc.laddress[0] = addr->address.sin.sin_addr.s_addr; 4636 stc.laddress[1] = 0; 4637 stc.laddress[2] = 0; 4638 stc.laddress[3] = 0; 4639 stc.laddr_type = SCTP_IPV4_ADDRESS; 4640 /* scope_id is only for v6 */ 4641 stc.scope_id = 0; 4642 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE 4643 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 4644 stc.ipv4_scope = 1; 4645 } 4646 #else 4647 stc.ipv4_scope = 1; 4648 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 4649 /* Must use the address in this case */ 4650 if (sctp_is_address_on_local_host((struct sockaddr *)sin, vrf_id)) { 4651 stc.loopback_scope = 1; 4652 stc.ipv4_scope = 1; 4653 stc.site_scope = 1; 4654 stc.local_scope = 0; 4655 } 4656 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 4657 struct sctp_ifa *addr; 4658 4659 struct route_in6 iproute6; 4660 4661 ip6 = mtod(init_pkt, struct ip6_hdr *); 4662 sin6->sin6_family = AF_INET6; 4663 sin6->sin6_len = sizeof(struct sockaddr_in6); 4664 sin6->sin6_port = sh->src_port; 4665 sin6->sin6_addr = ip6->ip6_src; 4666 /* lookup address */ 4667 memcpy(&stc.address, &sin6->sin6_addr, 4668 sizeof(struct in6_addr)); 4669 sin6->sin6_scope_id = 0; 4670 stc.addr_type = SCTP_IPV6_ADDRESS; 4671 stc.scope_id = 0; 4672 if (sctp_is_address_on_local_host((struct sockaddr *)sin6, vrf_id)) { 4673 stc.loopback_scope = 1; 4674 stc.local_scope = 0; 4675 stc.site_scope = 1; 4676 stc.ipv4_scope = 1; 4677 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 4678 /* 4679 * If the new destination is a LINK_LOCAL we 4680 * must have common both site and local 4681 * scope. Don't set local scope though since 4682 * we must depend on the source to be added 4683 * implicitly. We cannot assure just because 4684 * we share one link that all links are 4685 * common. 4686 */ 4687 stc.local_scope = 0; 4688 stc.site_scope = 1; 4689 stc.ipv4_scope = 1; 4690 /* 4691 * we start counting for the private address 4692 * stuff at 1. since the link local we 4693 * source from won't show up in our scoped 4694 * count. 4695 */ 4696 cnt_inits_to = 1; 4697 /* pull out the scope_id from incoming pkt */ 4698 /* FIX ME: does this have scope from rcvif? */ 4699 (void)sa6_recoverscope(sin6); 4700 4701 sa6_embedscope(sin6, ip6_use_defzone); 4702 stc.scope_id = sin6->sin6_scope_id; 4703 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 4704 /* 4705 * If the new destination is SITE_LOCAL then 4706 * we must have site scope in common. 4707 */ 4708 stc.site_scope = 1; 4709 } 4710 /* local from address */ 4711 memset(&iproute6, 0, sizeof(iproute6)); 4712 ro = (sctp_route_t *) & iproute6; 4713 memcpy(&ro->ro_dst, sin6, sizeof(*sin6)); 4714 addr = sctp_source_address_selection(inp, NULL, 4715 ro, NULL, 0, vrf_id); 4716 if (addr == NULL) 4717 return; 4718 4719 if (ro->ro_rt) { 4720 RTFREE(ro->ro_rt); 4721 ro->ro_rt = NULL; 4722 } 4723 memcpy(&stc.laddress, &addr->address.sin6.sin6_addr, sizeof(struct in6_addr)); 4724 stc.laddr_type = SCTP_IPV6_ADDRESS; 4725 } 4726 } else { 4727 /* set the scope per the existing tcb */ 4728 struct sctp_nets *lnet; 4729 4730 stc.loopback_scope = asoc->loopback_scope; 4731 stc.ipv4_scope = asoc->ipv4_local_scope; 4732 stc.site_scope = asoc->site_scope; 4733 stc.local_scope = asoc->local_scope; 4734 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { 4735 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) { 4736 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) { 4737 /* 4738 * if we have a LL address, start 4739 * counting at 1. 4740 */ 4741 cnt_inits_to = 1; 4742 } 4743 } 4744 } 4745 4746 /* use the net pointer */ 4747 to = (struct sockaddr *)&net->ro._l_addr; 4748 if (to->sa_family == AF_INET) { 4749 sin = (struct sockaddr_in *)to; 4750 stc.address[0] = sin->sin_addr.s_addr; 4751 stc.address[1] = 0; 4752 stc.address[2] = 0; 4753 stc.address[3] = 0; 4754 stc.addr_type = SCTP_IPV4_ADDRESS; 4755 if (net->src_addr_selected == 0) { 4756 /* 4757 * strange case here, the INIT should have 4758 * did the selection. 4759 */ 4760 net->ro._s_addr = sctp_source_address_selection(inp, 4761 stcb, (sctp_route_t *) & net->ro, 4762 net, 0, vrf_id); 4763 if (net->ro._s_addr == NULL) 4764 return; 4765 4766 net->src_addr_selected = 1; 4767 4768 } 4769 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr; 4770 stc.laddress[1] = 0; 4771 stc.laddress[2] = 0; 4772 stc.laddress[3] = 0; 4773 stc.laddr_type = SCTP_IPV4_ADDRESS; 4774 } else if (to->sa_family == AF_INET6) { 4775 sin6 = (struct sockaddr_in6 *)to; 4776 memcpy(&stc.address, &sin6->sin6_addr, 4777 sizeof(struct in6_addr)); 4778 stc.addr_type = SCTP_IPV6_ADDRESS; 4779 if (net->src_addr_selected == 0) { 4780 /* 4781 * strange case here, the INIT should have 4782 * did the selection. 4783 */ 4784 net->ro._s_addr = sctp_source_address_selection(inp, 4785 stcb, (sctp_route_t *) & net->ro, 4786 net, 0, vrf_id); 4787 if (net->ro._s_addr == NULL) 4788 return; 4789 4790 net->src_addr_selected = 1; 4791 } 4792 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr, 4793 sizeof(struct in6_addr)); 4794 stc.laddr_type = SCTP_IPV6_ADDRESS; 4795 } 4796 } 4797 /* Now lets put the SCTP header in place */ 4798 initackm_out = mtod(m, struct sctp_init_msg *); 4799 initackm_out->sh.src_port = inp->sctp_lport; 4800 initackm_out->sh.dest_port = sh->src_port; 4801 initackm_out->sh.v_tag = init_chk->init.initiate_tag; 4802 /* Save it off for quick ref */ 4803 stc.peers_vtag = init_chk->init.initiate_tag; 4804 initackm_out->sh.checksum = 0; /* calculate later */ 4805 /* who are we */ 4806 memcpy(stc.identification, SCTP_VERSION_STRING, 4807 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification))); 4808 /* now the chunk header */ 4809 initackm_out->msg.ch.chunk_type = SCTP_INITIATION_ACK; 4810 initackm_out->msg.ch.chunk_flags = 0; 4811 /* fill in later from mbuf we build */ 4812 initackm_out->msg.ch.chunk_length = 0; 4813 /* place in my tag */ 4814 if ((asoc != NULL) && 4815 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 4816 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) || 4817 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) { 4818 /* re-use the v-tags and init-seq here */ 4819 initackm_out->msg.init.initiate_tag = htonl(asoc->my_vtag); 4820 initackm_out->msg.init.initial_tsn = htonl(asoc->init_seq_number); 4821 } else { 4822 uint32_t vtag; 4823 4824 if (asoc) { 4825 atomic_add_int(&asoc->refcnt, 1); 4826 SCTP_TCB_UNLOCK(stcb); 4827 vtag = sctp_select_a_tag(inp); 4828 initackm_out->msg.init.initiate_tag = htonl(vtag); 4829 /* get a TSN to use too */ 4830 initackm_out->msg.init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep)); 4831 SCTP_TCB_LOCK(stcb); 4832 atomic_add_int(&asoc->refcnt, -1); 4833 } else { 4834 vtag = sctp_select_a_tag(inp); 4835 initackm_out->msg.init.initiate_tag = htonl(vtag); 4836 /* get a TSN to use too */ 4837 initackm_out->msg.init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep)); 4838 } 4839 } 4840 /* save away my tag to */ 4841 stc.my_vtag = initackm_out->msg.init.initiate_tag; 4842 4843 /* set up some of the credits. */ 4844 initackm_out->msg.init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(inp->sctp_socket), SCTP_MINIMAL_RWND)); 4845 /* set what I want */ 4846 his_limit = ntohs(init_chk->init.num_inbound_streams); 4847 /* choose what I want */ 4848 if (asoc != NULL) { 4849 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) { 4850 i_want = asoc->streamoutcnt; 4851 } else { 4852 i_want = inp->sctp_ep.pre_open_stream_count; 4853 } 4854 } else { 4855 i_want = inp->sctp_ep.pre_open_stream_count; 4856 } 4857 if (his_limit < i_want) { 4858 /* I Want more :< */ 4859 initackm_out->msg.init.num_outbound_streams = init_chk->init.num_inbound_streams; 4860 } else { 4861 /* I can have what I want :> */ 4862 initackm_out->msg.init.num_outbound_streams = htons(i_want); 4863 } 4864 /* tell him his limt. */ 4865 initackm_out->msg.init.num_inbound_streams = 4866 htons(inp->sctp_ep.max_open_streams_intome); 4867 /* setup the ECN pointer */ 4868 4869 if (inp->sctp_ep.adaptation_layer_indicator) { 4870 struct sctp_adaptation_layer_indication *ali; 4871 4872 ali = (struct sctp_adaptation_layer_indication *)( 4873 (caddr_t)initackm_out + sizeof(*initackm_out)); 4874 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 4875 ali->ph.param_length = htons(sizeof(*ali)); 4876 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator); 4877 SCTP_BUF_LEN(m) += sizeof(*ali); 4878 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + 4879 sizeof(*ali)); 4880 } else { 4881 ecn = (struct sctp_ecn_supported_param *)( 4882 (caddr_t)initackm_out + sizeof(*initackm_out)); 4883 } 4884 4885 /* ECN parameter */ 4886 if (sctp_ecn_enable == 1) { 4887 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE); 4888 ecn->ph.param_length = htons(sizeof(*ecn)); 4889 SCTP_BUF_LEN(m) += sizeof(*ecn); 4890 4891 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn + 4892 sizeof(*ecn)); 4893 } else { 4894 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn); 4895 } 4896 /* And now tell the peer we do pr-sctp */ 4897 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED); 4898 prsctp->ph.param_length = htons(sizeof(*prsctp)); 4899 SCTP_BUF_LEN(m) += sizeof(*prsctp); 4900 4901 /* And now tell the peer we do all the extensions */ 4902 pr_supported = (struct sctp_supported_chunk_types_param *) 4903 ((caddr_t)prsctp + sizeof(*prsctp)); 4904 4905 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 4906 num_ext = 0; 4907 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 4908 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 4909 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 4910 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 4911 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 4912 if (!sctp_auth_disable) 4913 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 4914 p_len = sizeof(*pr_supported) + num_ext; 4915 pr_supported->ph.param_length = htons(p_len); 4916 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len); 4917 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4918 4919 /* ECN nonce: And now tell the peer we support ECN nonce */ 4920 if (sctp_ecn_nonce) { 4921 ecn_nonce = (struct sctp_ecn_nonce_supported_param *) 4922 ((caddr_t)pr_supported + SCTP_SIZE32(p_len)); 4923 ecn_nonce->ph.param_type = htons(SCTP_ECN_NONCE_SUPPORTED); 4924 ecn_nonce->ph.param_length = htons(sizeof(*ecn_nonce)); 4925 SCTP_BUF_LEN(m) += sizeof(*ecn_nonce); 4926 } 4927 /* add authentication parameters */ 4928 if (!sctp_auth_disable) { 4929 struct sctp_auth_random *random; 4930 struct sctp_auth_hmac_algo *hmacs; 4931 struct sctp_auth_chunk_list *chunks; 4932 uint16_t random_len; 4933 4934 /* generate and add RANDOM parameter */ 4935 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT; 4936 random = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 4937 random->ph.param_type = htons(SCTP_RANDOM); 4938 p_len = sizeof(*random) + random_len; 4939 random->ph.param_length = htons(p_len); 4940 SCTP_READ_RANDOM(random->random_data, random_len); 4941 /* zero out any padding required */ 4942 bzero((caddr_t)random + p_len, SCTP_SIZE32(p_len) - p_len); 4943 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4944 4945 /* add HMAC_ALGO parameter */ 4946 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 4947 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs, 4948 (uint8_t *) hmacs->hmac_ids); 4949 if (p_len > 0) { 4950 p_len += sizeof(*hmacs); 4951 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 4952 hmacs->ph.param_length = htons(p_len); 4953 /* zero out any padding required */ 4954 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len); 4955 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4956 } 4957 /* add CHUNKS parameter */ 4958 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m)); 4959 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks, 4960 chunks->chunk_types); 4961 if (p_len > 0) { 4962 p_len += sizeof(*chunks); 4963 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 4964 chunks->ph.param_length = htons(p_len); 4965 /* zero out any padding required */ 4966 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len); 4967 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len); 4968 } 4969 } 4970 m_at = m; 4971 /* now the addresses */ 4972 { 4973 struct sctp_scoping scp; 4974 4975 /* 4976 * To optimize this we could put the scoping stuff into a 4977 * structure and remove the individual uint8's from the stc 4978 * structure. Then we could just sifa in the address within 4979 * the stc.. but for now this is a quick hack to get the 4980 * address stuff teased apart. 4981 */ 4982 scp.ipv4_addr_legal = stc.ipv4_addr_legal; 4983 scp.ipv6_addr_legal = stc.ipv6_addr_legal; 4984 scp.loopback_scope = stc.loopback_scope; 4985 scp.ipv4_local_scope = stc.ipv4_scope; 4986 scp.local_scope = stc.local_scope; 4987 scp.site_scope = stc.site_scope; 4988 m_at = sctp_add_addresses_to_i_ia(inp, &scp, m_at, cnt_inits_to); 4989 } 4990 4991 /* tack on the operational error if present */ 4992 if (op_err) { 4993 struct mbuf *ol; 4994 int llen; 4995 4996 llen = 0; 4997 ol = op_err; 4998 while (ol) { 4999 llen += SCTP_BUF_LEN(ol); 5000 ol = SCTP_BUF_NEXT(ol); 5001 } 5002 if (llen % 4) { 5003 /* must add a pad to the param */ 5004 uint32_t cpthis = 0; 5005 int padlen; 5006 5007 padlen = 4 - (llen % 4); 5008 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis); 5009 } 5010 while (SCTP_BUF_NEXT(m_at) != NULL) { 5011 m_at = SCTP_BUF_NEXT(m_at); 5012 } 5013 SCTP_BUF_NEXT(m_at) = op_err; 5014 while (SCTP_BUF_NEXT(m_at) != NULL) { 5015 m_at = SCTP_BUF_NEXT(m_at); 5016 } 5017 } 5018 /* Get total size of init packet */ 5019 sz_of = SCTP_SIZE32(ntohs(init_chk->ch.chunk_length)); 5020 /* pre-calulate the size and update pkt header and chunk header */ 5021 p_len = 0; 5022 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 5023 p_len += SCTP_BUF_LEN(m_tmp); 5024 if (SCTP_BUF_NEXT(m_tmp) == NULL) { 5025 /* m_tmp should now point to last one */ 5026 break; 5027 } 5028 } 5029 /* 5030 * Figure now the size of the cookie. We know the size of the 5031 * INIT-ACK. The Cookie is going to be the size of INIT, INIT-ACK, 5032 * COOKIE-STRUCTURE and SIGNATURE. 5033 */ 5034 5035 /* 5036 * take our earlier INIT calc and add in the sz we just calculated 5037 * minus the size of the sctphdr (its not included in chunk size 5038 */ 5039 5040 /* add once for the INIT-ACK */ 5041 sz_of += (p_len - sizeof(struct sctphdr)); 5042 5043 /* add a second time for the INIT-ACK in the cookie */ 5044 sz_of += (p_len - sizeof(struct sctphdr)); 5045 5046 /* Now add the cookie header and cookie message struct */ 5047 sz_of += sizeof(struct sctp_state_cookie_param); 5048 /* ...and add the size of our signature */ 5049 sz_of += SCTP_SIGNATURE_SIZE; 5050 initackm_out->msg.ch.chunk_length = htons(sz_of); 5051 5052 /* Now we must build a cookie */ 5053 m_cookie = sctp_add_cookie(inp, init_pkt, offset, m, 5054 sizeof(struct sctphdr), &stc); 5055 if (m_cookie == NULL) { 5056 /* memory problem */ 5057 sctp_m_freem(m); 5058 return; 5059 } 5060 /* Now append the cookie to the end and update the space/size */ 5061 SCTP_BUF_NEXT(m_tmp) = m_cookie; 5062 for (; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 5063 p_len += SCTP_BUF_LEN(m_tmp); 5064 if (SCTP_BUF_NEXT(m_tmp) == NULL) { 5065 /* m_tmp should now point to last one */ 5066 mp_last = m_tmp; 5067 break; 5068 } 5069 } 5070 5071 /* 5072 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return 5073 * here since the timer will drive a retranmission. 5074 */ 5075 padval = p_len % 4; 5076 if ((padval) && (mp_last)) { 5077 /* see my previous comments on mp_last */ 5078 int ret; 5079 5080 ret = sctp_add_pad_tombuf(mp_last, (4 - padval)); 5081 if (ret) { 5082 /* Houston we have a problem, no space */ 5083 sctp_m_freem(m); 5084 return; 5085 } 5086 p_len += padval; 5087 } 5088 sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0, 5089 NULL, 0); 5090 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 5091 } 5092 5093 5094 void 5095 sctp_insert_on_wheel(struct sctp_tcb *stcb, 5096 struct sctp_association *asoc, 5097 struct sctp_stream_out *strq, int holds_lock) 5098 { 5099 struct sctp_stream_out *stre, *strn; 5100 5101 if (holds_lock == 0) 5102 SCTP_TCB_SEND_LOCK(stcb); 5103 if ((strq->next_spoke.tqe_next) || 5104 (strq->next_spoke.tqe_prev)) { 5105 /* already on wheel */ 5106 goto outof_here; 5107 } 5108 stre = TAILQ_FIRST(&asoc->out_wheel); 5109 if (stre == NULL) { 5110 /* only one on wheel */ 5111 TAILQ_INSERT_HEAD(&asoc->out_wheel, strq, next_spoke); 5112 goto outof_here; 5113 } 5114 for (; stre; stre = strn) { 5115 strn = TAILQ_NEXT(stre, next_spoke); 5116 if (stre->stream_no > strq->stream_no) { 5117 TAILQ_INSERT_BEFORE(stre, strq, next_spoke); 5118 goto outof_here; 5119 } else if (stre->stream_no == strq->stream_no) { 5120 /* huh, should not happen */ 5121 goto outof_here; 5122 } else if (strn == NULL) { 5123 /* next one is null */ 5124 TAILQ_INSERT_AFTER(&asoc->out_wheel, stre, strq, 5125 next_spoke); 5126 } 5127 } 5128 outof_here: 5129 if (holds_lock == 0) 5130 SCTP_TCB_SEND_UNLOCK(stcb); 5131 5132 5133 } 5134 5135 static void 5136 sctp_remove_from_wheel(struct sctp_tcb *stcb, 5137 struct sctp_association *asoc, 5138 struct sctp_stream_out *strq) 5139 { 5140 /* take off and then setup so we know it is not on the wheel */ 5141 SCTP_TCB_SEND_LOCK(stcb); 5142 if (TAILQ_FIRST(&strq->outqueue)) { 5143 /* more was added */ 5144 SCTP_TCB_SEND_UNLOCK(stcb); 5145 return; 5146 } 5147 TAILQ_REMOVE(&asoc->out_wheel, strq, next_spoke); 5148 strq->next_spoke.tqe_next = NULL; 5149 strq->next_spoke.tqe_prev = NULL; 5150 SCTP_TCB_SEND_UNLOCK(stcb); 5151 } 5152 5153 static void 5154 sctp_prune_prsctp(struct sctp_tcb *stcb, 5155 struct sctp_association *asoc, 5156 struct sctp_sndrcvinfo *srcv, 5157 int dataout) 5158 { 5159 int freed_spc = 0; 5160 struct sctp_tmit_chunk *chk, *nchk; 5161 5162 SCTP_TCB_LOCK_ASSERT(stcb); 5163 if ((asoc->peer_supports_prsctp) && 5164 (asoc->sent_queue_cnt_removeable > 0)) { 5165 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 5166 /* 5167 * Look for chunks marked with the PR_SCTP flag AND 5168 * the buffer space flag. If the one being sent is 5169 * equal or greater priority then purge the old one 5170 * and free some space. 5171 */ 5172 if (PR_SCTP_BUF_ENABLED(chk->flags)) { 5173 /* 5174 * This one is PR-SCTP AND buffer space 5175 * limited type 5176 */ 5177 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 5178 /* 5179 * Lower numbers equates to higher 5180 * priority so if the one we are 5181 * looking at has a larger or equal 5182 * priority we want to drop the data 5183 * and NOT retransmit it. 5184 */ 5185 if (chk->data) { 5186 /* 5187 * We release the book_size 5188 * if the mbuf is here 5189 */ 5190 int ret_spc; 5191 int cause; 5192 5193 if (chk->sent > SCTP_DATAGRAM_UNSENT) 5194 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT; 5195 else 5196 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT; 5197 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 5198 cause, 5199 &asoc->sent_queue); 5200 freed_spc += ret_spc; 5201 if (freed_spc >= dataout) { 5202 return; 5203 } 5204 } /* if chunk was present */ 5205 } /* if of sufficent priority */ 5206 } /* if chunk has enabled */ 5207 } /* tailqforeach */ 5208 5209 chk = TAILQ_FIRST(&asoc->send_queue); 5210 while (chk) { 5211 nchk = TAILQ_NEXT(chk, sctp_next); 5212 /* Here we must move to the sent queue and mark */ 5213 if (PR_SCTP_TTL_ENABLED(chk->flags)) { 5214 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 5215 if (chk->data) { 5216 /* 5217 * We release the book_size 5218 * if the mbuf is here 5219 */ 5220 int ret_spc; 5221 5222 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 5223 SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT, 5224 &asoc->send_queue); 5225 5226 freed_spc += ret_spc; 5227 if (freed_spc >= dataout) { 5228 return; 5229 } 5230 } /* end if chk->data */ 5231 } /* end if right class */ 5232 } /* end if chk pr-sctp */ 5233 chk = nchk; 5234 } /* end while (chk) */ 5235 } /* if enabled in asoc */ 5236 } 5237 5238 __inline int 5239 sctp_get_frag_point(struct sctp_tcb *stcb, 5240 struct sctp_association *asoc) 5241 { 5242 int siz, ovh; 5243 5244 /* 5245 * For endpoints that have both v6 and v4 addresses we must reserve 5246 * room for the ipv6 header, for those that are only dealing with V4 5247 * we use a larger frag point. 5248 */ 5249 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 5250 ovh = SCTP_MED_OVERHEAD; 5251 } else { 5252 ovh = SCTP_MED_V4_OVERHEAD; 5253 } 5254 5255 if (stcb->sctp_ep->sctp_frag_point > asoc->smallest_mtu) 5256 siz = asoc->smallest_mtu - ovh; 5257 else 5258 siz = (stcb->sctp_ep->sctp_frag_point - ovh); 5259 /* 5260 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) { 5261 */ 5262 /* A data chunk MUST fit in a cluster */ 5263 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */ 5264 /* } */ 5265 5266 /* adjust for an AUTH chunk if DATA requires auth */ 5267 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) 5268 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 5269 5270 if (siz % 4) { 5271 /* make it an even word boundary please */ 5272 siz -= (siz % 4); 5273 } 5274 return (siz); 5275 } 5276 5277 static void 5278 sctp_set_prsctp_policy(struct sctp_tcb *stcb, 5279 struct sctp_stream_queue_pending *sp) 5280 { 5281 sp->pr_sctp_on = 0; 5282 if (stcb->asoc.peer_supports_prsctp) { 5283 /* 5284 * We assume that the user wants PR_SCTP_TTL if the user 5285 * provides a positive lifetime but does not specify any 5286 * PR_SCTP policy. This is a BAD assumption and causes 5287 * problems at least with the U-Vancovers MPI folks. I will 5288 * change this to be no policy means NO PR-SCTP. 5289 */ 5290 if (PR_SCTP_ENABLED(sp->sinfo_flags)) { 5291 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); 5292 sp->pr_sctp_on = 1; 5293 } else { 5294 return; 5295 } 5296 switch (PR_SCTP_POLICY(sp->sinfo_flags)) { 5297 case CHUNK_FLAGS_PR_SCTP_BUF: 5298 /* 5299 * Time to live is a priority stored in tv_sec when 5300 * doing the buffer drop thing. 5301 */ 5302 sp->ts.tv_sec = sp->timetolive; 5303 sp->ts.tv_usec = 0; 5304 break; 5305 case CHUNK_FLAGS_PR_SCTP_TTL: 5306 { 5307 struct timeval tv; 5308 5309 SCTP_GETTIME_TIMEVAL(&sp->ts); 5310 tv.tv_sec = sp->timetolive / 1000; 5311 tv.tv_usec = (sp->timetolive * 1000) % 1000000; 5312 timevaladd(&sp->ts, &tv); 5313 } 5314 break; 5315 case CHUNK_FLAGS_PR_SCTP_RTX: 5316 /* 5317 * Time to live is a the number or retransmissions 5318 * stored in tv_sec. 5319 */ 5320 sp->ts.tv_sec = sp->timetolive; 5321 sp->ts.tv_usec = 0; 5322 break; 5323 default: 5324 #ifdef SCTP_DEBUG 5325 if (sctp_debug_on & SCTP_DEBUG_USRREQ1) { 5326 printf("Unknown PR_SCTP policy %u.\n", PR_SCTP_POLICY(sp->sinfo_flags)); 5327 } 5328 #endif 5329 break; 5330 } 5331 } 5332 } 5333 5334 static int 5335 sctp_msg_append(struct sctp_tcb *stcb, 5336 struct sctp_nets *net, 5337 struct mbuf *m, 5338 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock) 5339 { 5340 int error = 0, holds_lock; 5341 struct mbuf *at; 5342 struct sctp_stream_queue_pending *sp = NULL; 5343 struct sctp_stream_out *strm; 5344 5345 /* 5346 * Given an mbuf chain, put it into the association send queue and 5347 * place it on the wheel 5348 */ 5349 holds_lock = hold_stcb_lock; 5350 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) { 5351 /* Invalid stream number */ 5352 error = EINVAL; 5353 goto out_now; 5354 } 5355 if ((stcb->asoc.stream_locked) && 5356 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) { 5357 error = EAGAIN; 5358 goto out_now; 5359 } 5360 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 5361 /* Now can we send this? */ 5362 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) || 5363 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 5364 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 5365 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) { 5366 /* got data while shutting down */ 5367 error = ECONNRESET; 5368 goto out_now; 5369 } 5370 sctp_alloc_a_strmoq(stcb, sp); 5371 if (sp == NULL) { 5372 error = ENOMEM; 5373 goto out_now; 5374 } 5375 sp->sinfo_flags = srcv->sinfo_flags; 5376 sp->timetolive = srcv->sinfo_timetolive; 5377 sp->ppid = srcv->sinfo_ppid; 5378 sp->context = srcv->sinfo_context; 5379 sp->strseq = 0; 5380 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 5381 sp->net = net; 5382 sp->addr_over = 1; 5383 } else { 5384 sp->net = stcb->asoc.primary_destination; 5385 sp->addr_over = 0; 5386 } 5387 atomic_add_int(&sp->net->ref_count, 1); 5388 SCTP_GETTIME_TIMEVAL(&sp->ts); 5389 sp->stream = srcv->sinfo_stream; 5390 sp->msg_is_complete = 1; 5391 sp->some_taken = 0; 5392 sp->data = m; 5393 sp->tail_mbuf = NULL; 5394 sp->length = 0; 5395 at = m; 5396 sctp_set_prsctp_policy(stcb, sp); 5397 /* 5398 * We could in theory (for sendall) sifa the length in, but we would 5399 * still have to hunt through the chain since we need to setup the 5400 * tail_mbuf 5401 */ 5402 while (at) { 5403 if (SCTP_BUF_NEXT(at) == NULL) 5404 sp->tail_mbuf = at; 5405 sp->length += SCTP_BUF_LEN(at); 5406 at = SCTP_BUF_NEXT(at); 5407 } 5408 SCTP_TCB_SEND_LOCK(stcb); 5409 sctp_snd_sb_alloc(stcb, sp->length); 5410 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1); 5411 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 5412 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) { 5413 sp->strseq = strm->next_sequence_sent; 5414 strm->next_sequence_sent++; 5415 } 5416 if ((strm->next_spoke.tqe_next == NULL) && 5417 (strm->next_spoke.tqe_prev == NULL)) { 5418 /* Not on wheel, insert */ 5419 sctp_insert_on_wheel(stcb, &stcb->asoc, strm, 1); 5420 } 5421 m = NULL; 5422 SCTP_TCB_SEND_UNLOCK(stcb); 5423 out_now: 5424 if (m) { 5425 sctp_m_freem(m); 5426 } 5427 return (error); 5428 } 5429 5430 5431 static struct mbuf * 5432 sctp_copy_mbufchain(struct mbuf *clonechain, 5433 struct mbuf *outchain, 5434 struct mbuf **endofchain, 5435 int can_take_mbuf, 5436 int sizeofcpy, 5437 uint8_t copy_by_ref) 5438 { 5439 struct mbuf *m; 5440 struct mbuf *appendchain; 5441 caddr_t cp; 5442 int len; 5443 5444 if (endofchain == NULL) { 5445 /* error */ 5446 error_out: 5447 if (outchain) 5448 sctp_m_freem(outchain); 5449 return (NULL); 5450 } 5451 if (can_take_mbuf) { 5452 appendchain = clonechain; 5453 } else { 5454 if (!copy_by_ref && (sizeofcpy <= ((((sctp_mbuf_threshold_count - 1) * MLEN) + MHLEN)))) { 5455 /* Its not in a cluster */ 5456 if (*endofchain == NULL) { 5457 /* lets get a mbuf cluster */ 5458 if (outchain == NULL) { 5459 /* This is the general case */ 5460 new_mbuf: 5461 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER); 5462 if (outchain == NULL) { 5463 goto error_out; 5464 } 5465 SCTP_BUF_LEN(outchain) = 0; 5466 *endofchain = outchain; 5467 /* get the prepend space */ 5468 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4)); 5469 } else { 5470 /* 5471 * We really should not get a NULL 5472 * in endofchain 5473 */ 5474 /* find end */ 5475 m = outchain; 5476 while (m) { 5477 if (SCTP_BUF_NEXT(m) == NULL) { 5478 *endofchain = m; 5479 break; 5480 } 5481 m = SCTP_BUF_NEXT(m); 5482 } 5483 /* sanity */ 5484 if (*endofchain == NULL) { 5485 /* 5486 * huh, TSNH XXX maybe we 5487 * should panic 5488 */ 5489 sctp_m_freem(outchain); 5490 goto new_mbuf; 5491 } 5492 } 5493 /* get the new end of length */ 5494 len = M_TRAILINGSPACE(*endofchain); 5495 } else { 5496 /* how much is left at the end? */ 5497 len = M_TRAILINGSPACE(*endofchain); 5498 } 5499 /* Find the end of the data, for appending */ 5500 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain))); 5501 5502 /* Now lets copy it out */ 5503 if (len >= sizeofcpy) { 5504 /* It all fits, copy it in */ 5505 m_copydata(clonechain, 0, sizeofcpy, cp); 5506 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 5507 } else { 5508 /* fill up the end of the chain */ 5509 if (len > 0) { 5510 m_copydata(clonechain, 0, len, cp); 5511 SCTP_BUF_LEN((*endofchain)) += len; 5512 /* now we need another one */ 5513 sizeofcpy -= len; 5514 } 5515 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER); 5516 if (m == NULL) { 5517 /* We failed */ 5518 goto error_out; 5519 } 5520 SCTP_BUF_NEXT((*endofchain)) = m; 5521 *endofchain = m; 5522 cp = mtod((*endofchain), caddr_t); 5523 m_copydata(clonechain, len, sizeofcpy, cp); 5524 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 5525 } 5526 return (outchain); 5527 } else { 5528 /* copy the old fashion way */ 5529 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT); 5530 } 5531 } 5532 if (appendchain == NULL) { 5533 /* error */ 5534 if (outchain) 5535 sctp_m_freem(outchain); 5536 return (NULL); 5537 } 5538 if (outchain) { 5539 /* tack on to the end */ 5540 if (*endofchain != NULL) { 5541 SCTP_BUF_NEXT(((*endofchain))) = appendchain; 5542 } else { 5543 m = outchain; 5544 while (m) { 5545 if (SCTP_BUF_NEXT(m) == NULL) { 5546 SCTP_BUF_NEXT(m) = appendchain; 5547 break; 5548 } 5549 m = SCTP_BUF_NEXT(m); 5550 } 5551 } 5552 /* 5553 * save off the end and update the end-chain postion 5554 */ 5555 m = appendchain; 5556 while (m) { 5557 if (SCTP_BUF_NEXT(m) == NULL) { 5558 *endofchain = m; 5559 break; 5560 } 5561 m = SCTP_BUF_NEXT(m); 5562 } 5563 return (outchain); 5564 } else { 5565 /* save off the end and update the end-chain postion */ 5566 m = appendchain; 5567 while (m) { 5568 if (SCTP_BUF_NEXT(m) == NULL) { 5569 *endofchain = m; 5570 break; 5571 } 5572 m = SCTP_BUF_NEXT(m); 5573 } 5574 return (appendchain); 5575 } 5576 } 5577 5578 int 5579 sctp_med_chunk_output(struct sctp_inpcb *inp, 5580 struct sctp_tcb *stcb, 5581 struct sctp_association *asoc, 5582 int *num_out, 5583 int *reason_code, 5584 int control_only, int *cwnd_full, int from_where, 5585 struct timeval *now, int *now_filled, int frag_point); 5586 5587 static void 5588 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr, 5589 uint32_t val) 5590 { 5591 struct sctp_copy_all *ca; 5592 struct mbuf *m; 5593 int ret = 0; 5594 int added_control = 0; 5595 int un_sent, do_chunk_output = 1; 5596 struct sctp_association *asoc; 5597 5598 ca = (struct sctp_copy_all *)ptr; 5599 if (ca->m == NULL) { 5600 return; 5601 } 5602 if (ca->inp != inp) { 5603 /* TSNH */ 5604 return; 5605 } 5606 if ((ca->m) && ca->sndlen) { 5607 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT); 5608 if (m == NULL) { 5609 /* can't copy so we are done */ 5610 ca->cnt_failed++; 5611 return; 5612 } 5613 } else { 5614 m = NULL; 5615 } 5616 SCTP_TCB_LOCK_ASSERT(stcb); 5617 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) { 5618 /* Abort this assoc with m as the user defined reason */ 5619 if (m) { 5620 struct sctp_paramhdr *ph; 5621 5622 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_DONTWAIT); 5623 if (m) { 5624 ph = mtod(m, struct sctp_paramhdr *); 5625 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 5626 ph->param_length = htons(ca->sndlen); 5627 } 5628 /* 5629 * We add one here to keep the assoc from 5630 * dis-appearing on us. 5631 */ 5632 atomic_add_int(&stcb->asoc.refcnt, 1); 5633 sctp_abort_an_association(inp, stcb, 5634 SCTP_RESPONSE_TO_USER_REQ, 5635 m); 5636 /* 5637 * sctp_abort_an_association calls sctp_free_asoc() 5638 * free association will NOT free it since we 5639 * incremented the refcnt .. we do this to prevent 5640 * it being freed and things getting tricky since we 5641 * could end up (from free_asoc) calling inpcb_free 5642 * which would get a recursive lock call to the 5643 * iterator lock.. But as a consequence of that the 5644 * stcb will return to us un-locked.. since 5645 * free_asoc returns with either no TCB or the TCB 5646 * unlocked, we must relock.. to unlock in the 5647 * iterator timer :-0 5648 */ 5649 SCTP_TCB_LOCK(stcb); 5650 atomic_add_int(&stcb->asoc.refcnt, -1); 5651 goto no_chunk_output; 5652 } 5653 } else { 5654 if (m) { 5655 ret = sctp_msg_append(stcb, stcb->asoc.primary_destination, m, 5656 &ca->sndrcv, 1); 5657 } 5658 asoc = &stcb->asoc; 5659 if (ca->sndrcv.sinfo_flags & SCTP_EOF) { 5660 /* shutdown this assoc */ 5661 if (TAILQ_EMPTY(&asoc->send_queue) && 5662 TAILQ_EMPTY(&asoc->sent_queue) && 5663 (asoc->stream_queue_cnt == 0)) { 5664 if (asoc->locked_on_sending) { 5665 goto abort_anyway; 5666 } 5667 /* 5668 * there is nothing queued to send, so I'm 5669 * done... 5670 */ 5671 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 5672 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 5673 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 5674 /* 5675 * only send SHUTDOWN the first time 5676 * through 5677 */ 5678 sctp_send_shutdown(stcb, stcb->asoc.primary_destination); 5679 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 5680 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 5681 } 5682 asoc->state = SCTP_STATE_SHUTDOWN_SENT; 5683 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 5684 asoc->primary_destination); 5685 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 5686 asoc->primary_destination); 5687 added_control = 1; 5688 do_chunk_output = 0; 5689 } 5690 } else { 5691 /* 5692 * we still got (or just got) data to send, 5693 * so set SHUTDOWN_PENDING 5694 */ 5695 /* 5696 * XXX sockets draft says that SCTP_EOF 5697 * should be sent with no data. currently, 5698 * we will allow user data to be sent first 5699 * and move to SHUTDOWN-PENDING 5700 */ 5701 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 5702 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 5703 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 5704 if (asoc->locked_on_sending) { 5705 /* 5706 * Locked to send out the 5707 * data 5708 */ 5709 struct sctp_stream_queue_pending *sp; 5710 5711 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 5712 if (sp) { 5713 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 5714 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 5715 } 5716 } 5717 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 5718 if (TAILQ_EMPTY(&asoc->send_queue) && 5719 TAILQ_EMPTY(&asoc->sent_queue) && 5720 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 5721 abort_anyway: 5722 atomic_add_int(&stcb->asoc.refcnt, 1); 5723 sctp_abort_an_association(stcb->sctp_ep, stcb, 5724 SCTP_RESPONSE_TO_USER_REQ, 5725 NULL); 5726 atomic_add_int(&stcb->asoc.refcnt, -1); 5727 goto no_chunk_output; 5728 } 5729 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 5730 asoc->primary_destination); 5731 } 5732 } 5733 5734 } 5735 } 5736 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 5737 ((stcb->asoc.chunks_on_out_queue - stcb->asoc.total_flight_count) * sizeof(struct sctp_data_chunk))); 5738 5739 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 5740 (stcb->asoc.total_flight > 0) && 5741 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) 5742 ) { 5743 do_chunk_output = 0; 5744 } 5745 if (do_chunk_output) 5746 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND); 5747 else if (added_control) { 5748 int num_out = 0, reason = 0, cwnd_full = 0, now_filled = 0; 5749 struct timeval now; 5750 int frag_point; 5751 5752 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 5753 sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 5754 &reason, 1, &cwnd_full, 1, &now, &now_filled, frag_point); 5755 } 5756 no_chunk_output: 5757 if (ret) { 5758 ca->cnt_failed++; 5759 } else { 5760 ca->cnt_sent++; 5761 } 5762 } 5763 5764 static void 5765 sctp_sendall_completes(void *ptr, uint32_t val) 5766 { 5767 struct sctp_copy_all *ca; 5768 5769 ca = (struct sctp_copy_all *)ptr; 5770 /* 5771 * Do a notify here? Kacheong suggests that the notify be done at 5772 * the send time.. so you would push up a notification if any send 5773 * failed. Don't know if this is feasable since the only failures we 5774 * have is "memory" related and if you cannot get an mbuf to send 5775 * the data you surely can't get an mbuf to send up to notify the 5776 * user you can't send the data :-> 5777 */ 5778 5779 /* now free everything */ 5780 sctp_m_freem(ca->m); 5781 SCTP_FREE(ca); 5782 } 5783 5784 5785 #define MC_ALIGN(m, len) do { \ 5786 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \ 5787 } while (0) 5788 5789 5790 5791 static struct mbuf * 5792 sctp_copy_out_all(struct uio *uio, int len) 5793 { 5794 struct mbuf *ret, *at; 5795 int left, willcpy, cancpy, error; 5796 5797 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA); 5798 if (ret == NULL) { 5799 /* TSNH */ 5800 return (NULL); 5801 } 5802 left = len; 5803 SCTP_BUF_LEN(ret) = 0; 5804 /* save space for the data chunk header */ 5805 cancpy = M_TRAILINGSPACE(ret); 5806 willcpy = min(cancpy, left); 5807 at = ret; 5808 while (left > 0) { 5809 /* Align data to the end */ 5810 error = uiomove(mtod(at, caddr_t), willcpy, uio); 5811 if (error) { 5812 err_out_now: 5813 sctp_m_freem(at); 5814 return (NULL); 5815 } 5816 SCTP_BUF_LEN(at) = willcpy; 5817 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0; 5818 left -= willcpy; 5819 if (left > 0) { 5820 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA); 5821 if (SCTP_BUF_NEXT(at) == NULL) { 5822 goto err_out_now; 5823 } 5824 at = SCTP_BUF_NEXT(at); 5825 SCTP_BUF_LEN(at) = 0; 5826 cancpy = M_TRAILINGSPACE(at); 5827 willcpy = min(cancpy, left); 5828 } 5829 } 5830 return (ret); 5831 } 5832 5833 static int 5834 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m, 5835 struct sctp_sndrcvinfo *srcv) 5836 { 5837 int ret; 5838 struct sctp_copy_all *ca; 5839 5840 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all), 5841 "CopyAll"); 5842 if (ca == NULL) { 5843 sctp_m_freem(m); 5844 return (ENOMEM); 5845 } 5846 memset(ca, 0, sizeof(struct sctp_copy_all)); 5847 5848 ca->inp = inp; 5849 ca->sndrcv = *srcv; 5850 /* 5851 * take off the sendall flag, it would be bad if we failed to do 5852 * this :-0 5853 */ 5854 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL; 5855 /* get length and mbuf chain */ 5856 if (uio) { 5857 ca->sndlen = uio->uio_resid; 5858 ca->m = sctp_copy_out_all(uio, ca->sndlen); 5859 if (ca->m == NULL) { 5860 SCTP_FREE(ca); 5861 return (ENOMEM); 5862 } 5863 } else { 5864 /* Gather the length of the send */ 5865 struct mbuf *mat; 5866 5867 mat = m; 5868 ca->sndlen = 0; 5869 while (m) { 5870 ca->sndlen += SCTP_BUF_LEN(m); 5871 m = SCTP_BUF_NEXT(m); 5872 } 5873 ca->m = m; 5874 } 5875 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL, 5876 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES, SCTP_ASOC_ANY_STATE, 5877 (void *)ca, 0, 5878 sctp_sendall_completes, inp, 1); 5879 if (ret) { 5880 #ifdef SCTP_DEBUG 5881 printf("Failed to initiate iterator for sendall\n"); 5882 #endif 5883 SCTP_FREE(ca); 5884 return (EFAULT); 5885 } 5886 return (0); 5887 } 5888 5889 5890 void 5891 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc) 5892 { 5893 struct sctp_tmit_chunk *chk, *nchk; 5894 5895 chk = TAILQ_FIRST(&asoc->control_send_queue); 5896 while (chk) { 5897 nchk = TAILQ_NEXT(chk, sctp_next); 5898 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 5899 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5900 if (chk->data) { 5901 sctp_m_freem(chk->data); 5902 chk->data = NULL; 5903 } 5904 asoc->ctrl_queue_cnt--; 5905 if (chk->whoTo) 5906 sctp_free_remote_addr(chk->whoTo); 5907 sctp_free_a_chunk(stcb, chk); 5908 } 5909 chk = nchk; 5910 } 5911 } 5912 5913 void 5914 sctp_toss_old_asconf(struct sctp_tcb *stcb) 5915 { 5916 struct sctp_association *asoc; 5917 struct sctp_tmit_chunk *chk, *chk_tmp; 5918 5919 asoc = &stcb->asoc; 5920 for (chk = TAILQ_FIRST(&asoc->control_send_queue); chk != NULL; 5921 chk = chk_tmp) { 5922 /* get next chk */ 5923 chk_tmp = TAILQ_NEXT(chk, sctp_next); 5924 /* find SCTP_ASCONF chunk in queue (only one ever in queue) */ 5925 if (chk->rec.chunk_id.id == SCTP_ASCONF) { 5926 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5927 if (chk->data) { 5928 sctp_m_freem(chk->data); 5929 chk->data = NULL; 5930 } 5931 asoc->ctrl_queue_cnt--; 5932 if (chk->whoTo) 5933 sctp_free_remote_addr(chk->whoTo); 5934 sctp_free_a_chunk(stcb, chk); 5935 } 5936 } 5937 } 5938 5939 5940 static __inline void 5941 sctp_clean_up_datalist(struct sctp_tcb *stcb, 5942 5943 struct sctp_association *asoc, 5944 struct sctp_tmit_chunk **data_list, 5945 int bundle_at, 5946 struct sctp_nets *net) 5947 { 5948 int i; 5949 struct sctp_tmit_chunk *tp1; 5950 5951 for (i = 0; i < bundle_at; i++) { 5952 /* off of the send queue */ 5953 if (i) { 5954 /* 5955 * Any chunk NOT 0 you zap the time chunk 0 gets 5956 * zapped or set based on if a RTO measurment is 5957 * needed. 5958 */ 5959 data_list[i]->do_rtt = 0; 5960 } 5961 /* record time */ 5962 data_list[i]->sent_rcv_time = net->last_sent_time; 5963 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq; 5964 TAILQ_REMOVE(&asoc->send_queue, 5965 data_list[i], 5966 sctp_next); 5967 /* on to the sent queue */ 5968 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead); 5969 if ((tp1) && (compare_with_wrap(tp1->rec.data.TSN_seq, 5970 data_list[i]->rec.data.TSN_seq, MAX_TSN))) { 5971 struct sctp_tmit_chunk *tpp; 5972 5973 /* need to move back */ 5974 back_up_more: 5975 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next); 5976 if (tpp == NULL) { 5977 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next); 5978 goto all_done; 5979 } 5980 tp1 = tpp; 5981 if (compare_with_wrap(tp1->rec.data.TSN_seq, 5982 data_list[i]->rec.data.TSN_seq, MAX_TSN)) { 5983 goto back_up_more; 5984 } 5985 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next); 5986 } else { 5987 TAILQ_INSERT_TAIL(&asoc->sent_queue, 5988 data_list[i], 5989 sctp_next); 5990 } 5991 all_done: 5992 /* This does not lower until the cum-ack passes it */ 5993 asoc->sent_queue_cnt++; 5994 asoc->send_queue_cnt--; 5995 if ((asoc->peers_rwnd <= 0) && 5996 (asoc->total_flight == 0) && 5997 (bundle_at == 1)) { 5998 /* Mark the chunk as being a window probe */ 5999 SCTP_STAT_INCR(sctps_windowprobed); 6000 } 6001 #ifdef SCTP_AUDITING_ENABLED 6002 sctp_audit_log(0xC2, 3); 6003 #endif 6004 data_list[i]->sent = SCTP_DATAGRAM_SENT; 6005 data_list[i]->snd_count = 1; 6006 data_list[i]->rec.data.chunk_was_revoked = 0; 6007 #ifdef SCTP_FLIGHT_LOGGING 6008 sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 6009 data_list[i]->whoTo->flight_size, 6010 data_list[i]->book_size, 6011 (uintptr_t) data_list[i]->whoTo, 6012 data_list[i]->rec.data.TSN_seq); 6013 #endif 6014 sctp_flight_size_increase(data_list[i]); 6015 sctp_total_flight_increase(stcb, data_list[i]); 6016 #ifdef SCTP_LOG_RWND 6017 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 6018 asoc->peers_rwnd, data_list[i]->send_size, sctp_peer_chunk_oh); 6019 #endif 6020 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 6021 (uint32_t) (data_list[i]->send_size + sctp_peer_chunk_oh)); 6022 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 6023 /* SWS sender side engages */ 6024 asoc->peers_rwnd = 0; 6025 } 6026 } 6027 } 6028 6029 static __inline void 6030 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc) 6031 { 6032 struct sctp_tmit_chunk *chk, *nchk; 6033 6034 for (chk = TAILQ_FIRST(&asoc->control_send_queue); 6035 chk; chk = nchk) { 6036 nchk = TAILQ_NEXT(chk, sctp_next); 6037 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 6038 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 6039 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 6040 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 6041 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 6042 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 6043 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 6044 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 6045 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 6046 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 6047 /* Stray chunks must be cleaned up */ 6048 clean_up_anyway: 6049 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 6050 if (chk->data) { 6051 sctp_m_freem(chk->data); 6052 chk->data = NULL; 6053 } 6054 asoc->ctrl_queue_cnt--; 6055 sctp_free_remote_addr(chk->whoTo); 6056 sctp_free_a_chunk(stcb, chk); 6057 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 6058 /* special handling, we must look into the param */ 6059 if (chk != asoc->str_reset) { 6060 goto clean_up_anyway; 6061 } 6062 } 6063 } 6064 } 6065 6066 6067 static __inline int 6068 sctp_can_we_split_this(struct sctp_tcb *stcb, 6069 struct sctp_stream_queue_pending *sp, 6070 int goal_mtu, int frag_point, int eeor_on) 6071 { 6072 /* 6073 * Make a decision on if I should split a msg into multiple parts. 6074 * This is only asked of incomplete messages. 6075 */ 6076 if (eeor_on) { 6077 /* 6078 * If we are doing EEOR we need to always send it if its the 6079 * entire thing, since it might be all the guy is putting in 6080 * the hopper. 6081 */ 6082 if (goal_mtu >= sp->length) { 6083 /*- 6084 * If we have data outstanding, 6085 * we get another chance when the sack 6086 * arrives to transmit - wait for more data 6087 */ 6088 if (stcb->asoc.total_flight == 0) { 6089 /* 6090 * If nothing is in flight, we zero the 6091 * packet counter. 6092 */ 6093 return (sp->length); 6094 } 6095 return (0); 6096 6097 } else { 6098 /* You can fill the rest */ 6099 return (goal_mtu); 6100 } 6101 } 6102 if ((sp->length <= goal_mtu) || ((sp->length - goal_mtu) < sctp_min_residual)) { 6103 /* Sub-optimial residual don't split in non-eeor mode. */ 6104 return (0); 6105 } 6106 /* 6107 * If we reach here sp->length is larger than the goal_mtu. Do we 6108 * wish to split it for the sake of packet putting together? 6109 */ 6110 if (goal_mtu >= min(sctp_min_split_point, frag_point)) { 6111 /* Its ok to split it */ 6112 return (min(goal_mtu, frag_point)); 6113 } 6114 /* Nope, can't split */ 6115 return (0); 6116 6117 } 6118 6119 static int 6120 sctp_move_to_outqueue(struct sctp_tcb *stcb, struct sctp_nets *net, 6121 struct sctp_stream_out *strq, 6122 int goal_mtu, 6123 int frag_point, 6124 int *locked, 6125 int *giveup, 6126 int eeor_mode) 6127 { 6128 /* Move from the stream to the send_queue keeping track of the total */ 6129 struct sctp_association *asoc; 6130 struct sctp_stream_queue_pending *sp; 6131 struct sctp_tmit_chunk *chk; 6132 struct sctp_data_chunk *dchkh; 6133 int to_move; 6134 uint8_t rcv_flags = 0; 6135 uint8_t some_taken; 6136 uint8_t send_lock_up = 0; 6137 6138 SCTP_TCB_LOCK_ASSERT(stcb); 6139 asoc = &stcb->asoc; 6140 one_more_time: 6141 sp = TAILQ_FIRST(&strq->outqueue); 6142 if (sp == NULL) { 6143 *locked = 0; 6144 SCTP_TCB_SEND_LOCK(stcb); 6145 sp = TAILQ_FIRST(&strq->outqueue); 6146 if (sp) { 6147 SCTP_TCB_SEND_UNLOCK(stcb); 6148 goto one_more_time; 6149 } 6150 if (strq->last_msg_incomplete) { 6151 printf("Huh? Stream:%d lm_in_c=%d but queue is NULL\n", 6152 strq->stream_no, strq->last_msg_incomplete); 6153 strq->last_msg_incomplete = 0; 6154 } 6155 SCTP_TCB_SEND_UNLOCK(stcb); 6156 return (0); 6157 } 6158 if (sp->msg_is_complete) { 6159 if (sp->length == 0) { 6160 if (sp->sender_all_done) { 6161 /* 6162 * We are doing differed cleanup. Last time 6163 * through when we took all the data the 6164 * sender_all_done was not set. 6165 */ 6166 if (sp->put_last_out == 0) { 6167 printf("Gak, put out entire msg with NO end!-1\n"); 6168 printf("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 6169 sp->sender_all_done, 6170 sp->length, 6171 sp->msg_is_complete, 6172 sp->put_last_out, 6173 send_lock_up); 6174 } 6175 if (TAILQ_NEXT(sp, next) == NULL) { 6176 SCTP_TCB_SEND_LOCK(stcb); 6177 send_lock_up = 1; 6178 } 6179 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 6180 TAILQ_REMOVE(&strq->outqueue, sp, next); 6181 sctp_free_remote_addr(sp->net); 6182 if (sp->data) { 6183 sctp_m_freem(sp->data); 6184 sp->data = NULL; 6185 } 6186 sctp_free_a_strmoq(stcb, sp); 6187 6188 /* we can't be locked to it */ 6189 *locked = 0; 6190 stcb->asoc.locked_on_sending = NULL; 6191 if (send_lock_up) { 6192 SCTP_TCB_SEND_UNLOCK(stcb); 6193 send_lock_up = 0; 6194 } 6195 /* back to get the next msg */ 6196 goto one_more_time; 6197 } else { 6198 /* 6199 * sender just finished this but still holds 6200 * a reference 6201 */ 6202 *locked = 1; 6203 *giveup = 1; 6204 return (0); 6205 } 6206 } 6207 } else { 6208 /* is there some to get */ 6209 if (sp->length == 0) { 6210 /* no */ 6211 *locked = 1; 6212 *giveup = 1; 6213 return (0); 6214 } 6215 } 6216 some_taken = sp->some_taken; 6217 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) { 6218 sp->msg_is_complete = 1; 6219 } 6220 re_look: 6221 if (sp->msg_is_complete) { 6222 /* The message is complete */ 6223 to_move = min(sp->length, frag_point); 6224 if (to_move == sp->length) { 6225 /* All of it fits in the MTU */ 6226 if (sp->some_taken) { 6227 rcv_flags |= SCTP_DATA_LAST_FRAG; 6228 sp->put_last_out = 1; 6229 } else { 6230 rcv_flags |= SCTP_DATA_NOT_FRAG; 6231 sp->put_last_out = 1; 6232 } 6233 } else { 6234 /* Not all of it fits, we fragment */ 6235 if (sp->some_taken == 0) { 6236 rcv_flags |= SCTP_DATA_FIRST_FRAG; 6237 } 6238 sp->some_taken = 1; 6239 } 6240 } else { 6241 to_move = sctp_can_we_split_this(stcb, sp, goal_mtu, 6242 frag_point, eeor_mode); 6243 if (to_move) { 6244 /*- 6245 * We use a snapshot of length in case it 6246 * is expanding during the compare. 6247 */ 6248 uint32_t llen; 6249 6250 llen = sp->length; 6251 if (to_move >= llen) { 6252 to_move = llen; 6253 if (send_lock_up == 0) { 6254 /*- 6255 * We are taking all of an incomplete msg 6256 * thus we need a send lock. 6257 */ 6258 SCTP_TCB_SEND_LOCK(stcb); 6259 send_lock_up = 1; 6260 if (sp->msg_is_complete) { 6261 /* 6262 * the sender finished the 6263 * msg 6264 */ 6265 goto re_look; 6266 } 6267 } 6268 } 6269 if (sp->some_taken == 0) { 6270 rcv_flags |= SCTP_DATA_FIRST_FRAG; 6271 sp->some_taken = 1; 6272 } 6273 } else { 6274 /* Nothing to take. */ 6275 if (sp->some_taken) { 6276 *locked = 1; 6277 } 6278 *giveup = 1; 6279 return (0); 6280 } 6281 } 6282 6283 /* If we reach here, we can copy out a chunk */ 6284 sctp_alloc_a_chunk(stcb, chk); 6285 if (chk == NULL) { 6286 /* No chunk memory */ 6287 out_gu: 6288 if (send_lock_up) { 6289 SCTP_TCB_SEND_UNLOCK(stcb); 6290 send_lock_up = 0; 6291 } 6292 *giveup = 1; 6293 return (0); 6294 } 6295 /* 6296 * Setup for unordered if needed by looking at the user sent info 6297 * flags. 6298 */ 6299 if (sp->sinfo_flags & SCTP_UNORDERED) { 6300 rcv_flags |= SCTP_DATA_UNORDERED; 6301 } 6302 /* clear out the chunk before setting up */ 6303 memset(chk, sizeof(*chk), 0); 6304 chk->rec.data.rcv_flags = rcv_flags; 6305 if (SCTP_BUF_IS_EXTENDED(sp->data)) { 6306 chk->copy_by_ref = 1; 6307 } else { 6308 chk->copy_by_ref = 0; 6309 } 6310 if (to_move >= sp->length) { 6311 /* we can steal the whole thing */ 6312 chk->data = sp->data; 6313 chk->last_mbuf = sp->tail_mbuf; 6314 /* register the stealing */ 6315 sp->data = sp->tail_mbuf = NULL; 6316 } else { 6317 struct mbuf *m; 6318 6319 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT); 6320 chk->last_mbuf = NULL; 6321 if (chk->data == NULL) { 6322 sp->some_taken = some_taken; 6323 sctp_free_a_chunk(stcb, chk); 6324 goto out_gu; 6325 } 6326 /* Pull off the data */ 6327 m_adj(sp->data, to_move); 6328 /* Now lets work our way down and compact it */ 6329 m = sp->data; 6330 while (m && (SCTP_BUF_LEN(m) == 0)) { 6331 sp->data = SCTP_BUF_NEXT(m); 6332 SCTP_BUF_NEXT(m) = NULL; 6333 if (sp->tail_mbuf == m) { 6334 /*- 6335 * Freeing tail? TSNH since 6336 * we supposedly were taking less 6337 * than the sp->length. 6338 */ 6339 #ifdef INVARIANTS 6340 panic("Huh, freing tail? - TSNH"); 6341 #else 6342 printf("Huh, freeing tail? - TSNH\n"); 6343 sp->tail_mbuf = sp->data = NULL; 6344 sp->length = 0; 6345 #endif 6346 6347 } 6348 sctp_m_free(m); 6349 m = sp->data; 6350 } 6351 } 6352 if (to_move > sp->length) { 6353 /*- This should not happen either 6354 * since we always lower to_move to the size 6355 * of sp->length if its larger. 6356 */ 6357 #ifdef INVARIANTS 6358 panic("Huh, how can to_move be larger?"); 6359 #else 6360 printf("Huh, how can to_move be larger?\n"); 6361 sp->length = 0; 6362 #endif 6363 } else { 6364 atomic_subtract_int(&sp->length, to_move); 6365 } 6366 if (M_LEADINGSPACE(chk->data) < sizeof(struct sctp_data_chunk)) { 6367 /* Not enough room for a chunk header, get some */ 6368 struct mbuf *m; 6369 6370 m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA); 6371 if (m == NULL) { 6372 /* 6373 * we're in trouble here. _PREPEND below will free 6374 * all the data if there is no leading space, so we 6375 * must put the data back and restore. 6376 */ 6377 if (send_lock_up == 0) { 6378 SCTP_TCB_SEND_LOCK(stcb); 6379 send_lock_up = 1; 6380 } 6381 if (chk->data == NULL) { 6382 /* unsteal the data */ 6383 sp->data = chk->data; 6384 sp->tail_mbuf = chk->last_mbuf; 6385 } else { 6386 struct mbuf *m; 6387 6388 /* reassemble the data */ 6389 m = sp->data; 6390 sp->data = chk->data; 6391 SCTP_BUF_NEXT(sp->data) = m; 6392 } 6393 sp->some_taken = some_taken; 6394 atomic_add_int(&sp->length, to_move); 6395 chk->data = NULL; 6396 sctp_free_a_chunk(stcb, chk); 6397 goto out_gu; 6398 } else { 6399 SCTP_BUF_LEN(m) = 0; 6400 SCTP_BUF_NEXT(m) = chk->data; 6401 chk->data = m; 6402 M_ALIGN(chk->data, 4); 6403 } 6404 } 6405 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT); 6406 if (chk->data == NULL) { 6407 /* HELP, TSNH since we assured it would not above? */ 6408 #ifdef INVARIANTS 6409 panic("prepend failes HELP?"); 6410 #else 6411 printf("prepend fails HELP?\n"); 6412 sctp_free_a_chunk(stcb, chk); 6413 #endif 6414 goto out_gu; 6415 } 6416 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk)); 6417 chk->book_size = chk->send_size = (to_move + 6418 sizeof(struct sctp_data_chunk)); 6419 chk->book_size_scale = 0; 6420 chk->sent = SCTP_DATAGRAM_UNSENT; 6421 6422 /* 6423 * get last_mbuf and counts of mb useage This is ugly but hopefully 6424 * its only one mbuf. 6425 */ 6426 if (chk->last_mbuf == NULL) { 6427 chk->last_mbuf = chk->data; 6428 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) { 6429 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf); 6430 } 6431 } 6432 chk->flags = 0; 6433 chk->asoc = &stcb->asoc; 6434 chk->pad_inplace = 0; 6435 chk->no_fr_allowed = 0; 6436 chk->rec.data.stream_seq = sp->strseq; 6437 chk->rec.data.stream_number = sp->stream; 6438 chk->rec.data.payloadtype = sp->ppid; 6439 chk->rec.data.context = sp->context; 6440 chk->rec.data.doing_fast_retransmit = 0; 6441 chk->rec.data.ect_nonce = 0; /* ECN Nonce */ 6442 6443 chk->rec.data.timetodrop = sp->ts; 6444 chk->flags = sp->act_flags; 6445 chk->addr_over = sp->addr_over; 6446 6447 chk->whoTo = net; 6448 atomic_add_int(&chk->whoTo->ref_count, 1); 6449 6450 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1); 6451 #ifdef SCTP_LOG_SENDING_STR 6452 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND, 6453 (uintptr_t) stcb, (uintptr_t) sp, 6454 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq), 6455 chk->rec.data.TSN_seq); 6456 #endif 6457 6458 dchkh = mtod(chk->data, struct sctp_data_chunk *); 6459 /* 6460 * Put the rest of the things in place now. Size was done earlier in 6461 * previous loop prior to padding. 6462 */ 6463 6464 #ifdef SCTP_ASOCLOG_OF_TSNS 6465 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq; 6466 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number; 6467 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq; 6468 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size; 6469 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags; 6470 asoc->tsn_out_at++; 6471 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) { 6472 asoc->tsn_out_at = 0; 6473 asoc->tsn_out_wrapped = 1; 6474 } 6475 #endif 6476 6477 dchkh->ch.chunk_type = SCTP_DATA; 6478 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags; 6479 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq); 6480 dchkh->dp.stream_id = htons(strq->stream_no); 6481 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq); 6482 dchkh->dp.protocol_id = chk->rec.data.payloadtype; 6483 dchkh->ch.chunk_length = htons(chk->send_size); 6484 /* Now advance the chk->send_size by the actual pad needed. */ 6485 if (chk->send_size < SCTP_SIZE32(chk->book_size)) { 6486 /* need a pad */ 6487 struct mbuf *lm; 6488 int pads; 6489 6490 pads = SCTP_SIZE32(chk->book_size) - chk->send_size; 6491 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) { 6492 chk->pad_inplace = 1; 6493 } 6494 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) { 6495 /* pad added an mbuf */ 6496 chk->last_mbuf = lm; 6497 } 6498 chk->send_size += pads; 6499 } 6500 /* We only re-set the policy if it is on */ 6501 if (sp->pr_sctp_on) { 6502 sctp_set_prsctp_policy(stcb, sp); 6503 } 6504 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) { 6505 /* All done pull and kill the message */ 6506 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 6507 if (sp->put_last_out == 0) { 6508 printf("Gak, put out entire msg with NO end!-2\n"); 6509 printf("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 6510 sp->sender_all_done, 6511 sp->length, 6512 sp->msg_is_complete, 6513 sp->put_last_out, 6514 send_lock_up); 6515 } 6516 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) { 6517 SCTP_TCB_SEND_LOCK(stcb); 6518 send_lock_up = 1; 6519 } 6520 TAILQ_REMOVE(&strq->outqueue, sp, next); 6521 sctp_free_remote_addr(sp->net); 6522 if (sp->data) { 6523 sctp_m_freem(sp->data); 6524 sp->data = NULL; 6525 } 6526 sctp_free_a_strmoq(stcb, sp); 6527 6528 /* we can't be locked to it */ 6529 *locked = 0; 6530 stcb->asoc.locked_on_sending = NULL; 6531 } else { 6532 /* more to go, we are locked */ 6533 *locked = 1; 6534 } 6535 asoc->chunks_on_out_queue++; 6536 if (sp->pr_sctp_on) { 6537 asoc->pr_sctp_cnt++; 6538 chk->pr_sctp_on = 1; 6539 } else { 6540 chk->pr_sctp_on = 0; 6541 } 6542 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next); 6543 asoc->send_queue_cnt++; 6544 if (send_lock_up) { 6545 SCTP_TCB_SEND_UNLOCK(stcb); 6546 send_lock_up = 0; 6547 } 6548 return (to_move); 6549 } 6550 6551 6552 static struct sctp_stream_out * 6553 sctp_select_a_stream(struct sctp_tcb *stcb, struct sctp_association *asoc) 6554 { 6555 struct sctp_stream_out *strq; 6556 6557 /* Find the next stream to use */ 6558 if (asoc->last_out_stream == NULL) { 6559 strq = asoc->last_out_stream = TAILQ_FIRST(&asoc->out_wheel); 6560 if (asoc->last_out_stream == NULL) { 6561 /* huh nothing on the wheel, TSNH */ 6562 return (NULL); 6563 } 6564 goto done_it; 6565 } 6566 strq = TAILQ_NEXT(asoc->last_out_stream, next_spoke); 6567 done_it: 6568 if (strq == NULL) { 6569 strq = asoc->last_out_stream = TAILQ_FIRST(&asoc->out_wheel); 6570 } 6571 return (strq); 6572 6573 } 6574 6575 static void 6576 sctp_fill_outqueue(struct sctp_tcb *stcb, 6577 struct sctp_nets *net, int frag_point, int eeor_mode) 6578 { 6579 struct sctp_association *asoc; 6580 struct sctp_stream_out *strq, *strqn, *strqt; 6581 int goal_mtu, moved_how_much, total_moved = 0; 6582 int locked, giveup; 6583 struct sctp_stream_queue_pending *sp; 6584 6585 SCTP_TCB_LOCK_ASSERT(stcb); 6586 asoc = &stcb->asoc; 6587 #ifdef INET6 6588 if (net->ro._l_addr.sin6.sin6_family == AF_INET6) { 6589 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD; 6590 } else { 6591 /* ?? not sure what else to do */ 6592 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 6593 } 6594 #else 6595 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD; 6596 mtu_fromwheel = 0; 6597 #endif 6598 /* Need an allowance for the data chunk header too */ 6599 goal_mtu -= sizeof(struct sctp_data_chunk); 6600 6601 /* must make even word boundary */ 6602 goal_mtu &= 0xfffffffc; 6603 if (asoc->locked_on_sending) { 6604 /* We are stuck on one stream until the message completes. */ 6605 strqn = strq = asoc->locked_on_sending; 6606 locked = 1; 6607 } else { 6608 strqn = strq = sctp_select_a_stream(stcb, asoc); 6609 locked = 0; 6610 } 6611 6612 while ((goal_mtu > 0) && strq) { 6613 sp = TAILQ_FIRST(&strq->outqueue); 6614 /* 6615 * If CMT is off, we must validate that the stream in 6616 * question has the first item pointed towards are network 6617 * destionation requested by the caller. Note that if we 6618 * turn out to be locked to a stream (assigning TSN's then 6619 * we must stop, since we cannot look for another stream 6620 * with data to send to that destination). In CMT's case, by 6621 * skipping this check, we will send one data packet towards 6622 * the requested net. 6623 */ 6624 if (sp == NULL) { 6625 break; 6626 } 6627 if ((sp->net != net) && (sctp_cmt_on_off == 0)) { 6628 /* none for this network */ 6629 if (locked) { 6630 break; 6631 } else { 6632 strq = sctp_select_a_stream(stcb, asoc); 6633 if (strq == NULL) 6634 /* none left */ 6635 break; 6636 if (strqn == strq) { 6637 /* I have circled */ 6638 break; 6639 } 6640 continue; 6641 } 6642 } 6643 giveup = 0; 6644 moved_how_much = sctp_move_to_outqueue(stcb, net, strq, goal_mtu, frag_point, &locked, 6645 &giveup, eeor_mode); 6646 asoc->last_out_stream = strq; 6647 if (locked) { 6648 asoc->locked_on_sending = strq; 6649 if ((moved_how_much == 0) || (giveup)) 6650 /* no more to move for now */ 6651 break; 6652 } else { 6653 asoc->locked_on_sending = NULL; 6654 strqt = sctp_select_a_stream(stcb, asoc); 6655 if (TAILQ_FIRST(&strq->outqueue) == NULL) { 6656 sctp_remove_from_wheel(stcb, asoc, strq); 6657 } 6658 if (giveup) { 6659 break; 6660 } 6661 strq = strqt; 6662 if (strq == NULL) { 6663 break; 6664 } 6665 } 6666 total_moved += moved_how_much; 6667 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk)); 6668 goal_mtu &= 0xfffffffc; 6669 } 6670 if (total_moved == 0) { 6671 if ((sctp_cmt_on_off == 0) && 6672 (net == stcb->asoc.primary_destination)) { 6673 /* ran dry for primary network net */ 6674 SCTP_STAT_INCR(sctps_primary_randry); 6675 } else if (sctp_cmt_on_off) { 6676 /* ran dry with CMT on */ 6677 SCTP_STAT_INCR(sctps_cmt_randry); 6678 } 6679 } 6680 } 6681 6682 __inline void 6683 sctp_fix_ecn_echo(struct sctp_association *asoc) 6684 { 6685 struct sctp_tmit_chunk *chk; 6686 6687 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 6688 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 6689 chk->sent = SCTP_DATAGRAM_UNSENT; 6690 } 6691 } 6692 } 6693 6694 static void 6695 sctp_move_to_an_alt(struct sctp_tcb *stcb, 6696 struct sctp_association *asoc, 6697 struct sctp_nets *net) 6698 { 6699 struct sctp_tmit_chunk *chk; 6700 struct sctp_nets *a_net; 6701 6702 SCTP_TCB_LOCK_ASSERT(stcb); 6703 a_net = sctp_find_alternate_net(stcb, net, 0); 6704 if ((a_net != net) && 6705 ((a_net->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE)) { 6706 /* 6707 * We only proceed if a valid alternate is found that is not 6708 * this one and is reachable. Here we must move all chunks 6709 * queued in the send queue off of the destination address 6710 * to our alternate. 6711 */ 6712 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 6713 if (chk->whoTo == net) { 6714 /* Move the chunk to our alternate */ 6715 sctp_free_remote_addr(chk->whoTo); 6716 chk->whoTo = a_net; 6717 atomic_add_int(&a_net->ref_count, 1); 6718 } 6719 } 6720 } 6721 } 6722 6723 int 6724 sctp_med_chunk_output(struct sctp_inpcb *inp, 6725 struct sctp_tcb *stcb, 6726 struct sctp_association *asoc, 6727 int *num_out, 6728 int *reason_code, 6729 int control_only, int *cwnd_full, int from_where, 6730 struct timeval *now, int *now_filled, int frag_point) 6731 { 6732 /* 6733 * Ok this is the generic chunk service queue. we must do the 6734 * following: - Service the stream queue that is next, moving any 6735 * message (note I must get a complete message i.e. FIRST/MIDDLE and 6736 * LAST to the out queue in one pass) and assigning TSN's - Check to 6737 * see if the cwnd/rwnd allows any output, if so we go ahead and 6738 * fomulate and send the low level chunks. Making sure to combine 6739 * any control in the control chunk queue also. 6740 */ 6741 struct sctp_nets *net; 6742 struct mbuf *outchain, *endoutchain; 6743 struct sctp_tmit_chunk *chk, *nchk; 6744 struct sctphdr *shdr; 6745 6746 /* temp arrays for unlinking */ 6747 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 6748 int no_fragmentflg, error; 6749 int one_chunk, hbflag, skip_data_for_this_net; 6750 int asconf, cookie, no_out_cnt; 6751 int bundle_at, ctl_cnt, no_data_chunks, cwnd_full_ind, eeor_mode; 6752 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out; 6753 struct sctp_nets *start_at, *old_startat = NULL, *send_start_at; 6754 int tsns_sent = 0; 6755 uint32_t auth_offset = 0; 6756 struct sctp_auth_chunk *auth = NULL; 6757 6758 *num_out = 0; 6759 cwnd_full_ind = 0; 6760 6761 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) || 6762 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) || 6763 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { 6764 eeor_mode = 1; 6765 } else { 6766 eeor_mode = 0; 6767 } 6768 ctl_cnt = no_out_cnt = asconf = cookie = 0; 6769 /* 6770 * First lets prime the pump. For each destination, if there is room 6771 * in the flight size, attempt to pull an MTU's worth out of the 6772 * stream queues into the general send_queue 6773 */ 6774 #ifdef SCTP_AUDITING_ENABLED 6775 sctp_audit_log(0xC2, 2); 6776 #endif 6777 SCTP_TCB_LOCK_ASSERT(stcb); 6778 hbflag = 0; 6779 if ((control_only) || (asoc->stream_reset_outstanding)) 6780 no_data_chunks = 1; 6781 else 6782 no_data_chunks = 0; 6783 6784 /* Nothing to possible to send? */ 6785 if (TAILQ_EMPTY(&asoc->control_send_queue) && 6786 TAILQ_EMPTY(&asoc->send_queue) && 6787 TAILQ_EMPTY(&asoc->out_wheel)) { 6788 *reason_code = 9; 6789 return (0); 6790 } 6791 if (asoc->peers_rwnd == 0) { 6792 /* No room in peers rwnd */ 6793 *cwnd_full = 1; 6794 *reason_code = 1; 6795 if (asoc->total_flight > 0) { 6796 /* we are allowed one chunk in flight */ 6797 no_data_chunks = 1; 6798 } 6799 } 6800 if ((no_data_chunks == 0) && (!TAILQ_EMPTY(&asoc->out_wheel))) { 6801 if (sctp_cmt_on_off) { 6802 /* 6803 * for CMT we start at the next one past the one we 6804 * last added data to. 6805 */ 6806 if (TAILQ_FIRST(&asoc->send_queue) != NULL) { 6807 goto skip_the_fill_from_streams; 6808 } 6809 if (asoc->last_net_data_came_from) { 6810 net = TAILQ_NEXT(asoc->last_net_data_came_from, sctp_next); 6811 if (net == NULL) { 6812 net = TAILQ_FIRST(&asoc->nets); 6813 } 6814 } else { 6815 /* back to start */ 6816 net = TAILQ_FIRST(&asoc->nets); 6817 } 6818 6819 } else { 6820 net = asoc->primary_destination; 6821 if (net == NULL) { 6822 /* TSNH */ 6823 net = TAILQ_FIRST(&asoc->nets); 6824 } 6825 } 6826 start_at = net; 6827 one_more_time: 6828 for (; net != NULL; net = TAILQ_NEXT(net, sctp_next)) { 6829 net->window_probe = 0; 6830 if (old_startat && (old_startat == net)) { 6831 break; 6832 } 6833 if ((sctp_cmt_on_off == 0) && (net->ref_count < 2)) { 6834 /* nothing can be in queue for this guy */ 6835 continue; 6836 } 6837 if (net->flight_size >= net->cwnd) { 6838 /* skip this network, no room */ 6839 cwnd_full_ind++; 6840 continue; 6841 } 6842 /* 6843 * @@@ JRI : this for loop we are in takes in each 6844 * net, if its's got space in cwnd and has data sent 6845 * to it (when CMT is off) then it calls 6846 * sctp_fill_outqueue for the net. This gets data on 6847 * the send queue for that network. 6848 * 6849 * In sctp_fill_outqueue TSN's are assigned and data is 6850 * copied out of the stream buffers. Note mostly 6851 * copy by reference (we hope). 6852 */ 6853 #ifdef SCTP_CWND_LOGGING 6854 sctp_log_cwnd(stcb, net, 0, SCTP_CWND_LOG_FILL_OUTQ_CALLED); 6855 #endif 6856 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode); 6857 } 6858 if (start_at != TAILQ_FIRST(&asoc->nets)) { 6859 /* got to pick up the beginning stuff. */ 6860 old_startat = start_at; 6861 start_at = net = TAILQ_FIRST(&asoc->nets); 6862 goto one_more_time; 6863 } 6864 } 6865 skip_the_fill_from_streams: 6866 *cwnd_full = cwnd_full_ind; 6867 /* now service each destination and send out what we can for it */ 6868 /* Nothing to send? */ 6869 if ((TAILQ_FIRST(&asoc->control_send_queue) == NULL) && 6870 (TAILQ_FIRST(&asoc->send_queue) == NULL)) { 6871 *reason_code = 8; 6872 return (0); 6873 } 6874 chk = TAILQ_FIRST(&asoc->send_queue); 6875 if (chk) { 6876 send_start_at = chk->whoTo; 6877 } else { 6878 send_start_at = TAILQ_FIRST(&asoc->nets); 6879 } 6880 old_startat = NULL; 6881 again_one_more_time: 6882 for (net = send_start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) { 6883 /* how much can we send? */ 6884 /* printf("Examine for sending net:%x\n", (uint32_t)net); */ 6885 if (old_startat && (old_startat == net)) { 6886 /* through list ocmpletely. */ 6887 break; 6888 } 6889 tsns_sent = 0; 6890 if (net->ref_count < 2) { 6891 /* 6892 * Ref-count of 1 so we cannot have data or control 6893 * queued to this address. Skip it. 6894 */ 6895 continue; 6896 } 6897 ctl_cnt = bundle_at = 0; 6898 endoutchain = outchain = NULL; 6899 no_fragmentflg = 1; 6900 one_chunk = 0; 6901 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6902 skip_data_for_this_net = 1; 6903 } else { 6904 skip_data_for_this_net = 0; 6905 } 6906 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) { 6907 /* 6908 * if we have a route and an ifp check to see if we 6909 * have room to send to this guy 6910 */ 6911 struct ifnet *ifp; 6912 6913 ifp = net->ro.ro_rt->rt_ifp; 6914 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) { 6915 SCTP_STAT_INCR(sctps_ifnomemqueued); 6916 #ifdef SCTP_LOG_MAXBURST 6917 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED); 6918 #endif 6919 continue; 6920 } 6921 } 6922 if (((struct sockaddr *)&net->ro._l_addr)->sa_family == AF_INET) { 6923 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr)); 6924 } else { 6925 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)); 6926 } 6927 mx_mtu = mtu; 6928 to_out = 0; 6929 if (mtu > asoc->peers_rwnd) { 6930 if (asoc->total_flight > 0) { 6931 /* We have a packet in flight somewhere */ 6932 r_mtu = asoc->peers_rwnd; 6933 } else { 6934 /* We are always allowed to send one MTU out */ 6935 one_chunk = 1; 6936 r_mtu = mtu; 6937 } 6938 } else { 6939 r_mtu = mtu; 6940 } 6941 /************************/ 6942 /* Control transmission */ 6943 /************************/ 6944 /* Now first lets go through the control queue */ 6945 for (chk = TAILQ_FIRST(&asoc->control_send_queue); 6946 chk; chk = nchk) { 6947 nchk = TAILQ_NEXT(chk, sctp_next); 6948 if (chk->whoTo != net) { 6949 /* 6950 * No, not sent to the network we are 6951 * looking at 6952 */ 6953 continue; 6954 } 6955 if (chk->data == NULL) { 6956 continue; 6957 } 6958 if (chk->sent != SCTP_DATAGRAM_UNSENT) { 6959 /* 6960 * It must be unsent. Cookies and ASCONF's 6961 * hang around but there timers will force 6962 * when marked for resend. 6963 */ 6964 continue; 6965 } 6966 /* 6967 * if no AUTH is yet included and this chunk 6968 * requires it, make sure to account for it. We 6969 * don't apply the size until the AUTH chunk is 6970 * actually added below in case there is no room for 6971 * this chunk. NOTE: we overload the use of "omtu" 6972 * here 6973 */ 6974 if ((auth == NULL) && 6975 sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 6976 stcb->asoc.peer_auth_chunks)) { 6977 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 6978 } else 6979 omtu = 0; 6980 /* Here we do NOT factor the r_mtu */ 6981 if ((chk->send_size < (int)(mtu - omtu)) || 6982 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 6983 /* 6984 * We probably should glom the mbuf chain 6985 * from the chk->data for control but the 6986 * problem is it becomes yet one more level 6987 * of tracking to do if for some reason 6988 * output fails. Then I have got to 6989 * reconstruct the merged control chain.. el 6990 * yucko.. for now we take the easy way and 6991 * do the copy 6992 */ 6993 /* 6994 * Add an AUTH chunk, if chunk requires it 6995 * save the offset into the chain for AUTH 6996 */ 6997 if ((auth == NULL) && 6998 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 6999 stcb->asoc.peer_auth_chunks))) { 7000 outchain = sctp_add_auth_chunk(outchain, 7001 &endoutchain, 7002 &auth, 7003 &auth_offset, 7004 stcb, 7005 chk->rec.chunk_id.id); 7006 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 7007 } 7008 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 7009 (int)chk->rec.chunk_id.can_take_data, 7010 chk->send_size, chk->copy_by_ref); 7011 if (outchain == NULL) { 7012 *reason_code = 8; 7013 return (ENOMEM); 7014 } 7015 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 7016 /* update our MTU size */ 7017 if (mtu > (chk->send_size + omtu)) 7018 mtu -= (chk->send_size + omtu); 7019 else 7020 mtu = 0; 7021 to_out += (chk->send_size + omtu); 7022 /* Do clear IP_DF ? */ 7023 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 7024 no_fragmentflg = 0; 7025 } 7026 if (chk->rec.chunk_id.can_take_data) 7027 chk->data = NULL; 7028 /* Mark things to be removed, if needed */ 7029 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 7030 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 7031 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 7032 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 7033 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 7034 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 7035 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 7036 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 7037 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 7038 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 7039 7040 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) 7041 hbflag = 1; 7042 /* remove these chunks at the end */ 7043 if (chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) { 7044 /* turn off the timer */ 7045 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 7046 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 7047 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1); 7048 } 7049 } 7050 ctl_cnt++; 7051 } else { 7052 /* 7053 * Other chunks, since they have 7054 * timers running (i.e. COOKIE or 7055 * ASCONF) we just "trust" that it 7056 * gets sent or retransmitted. 7057 */ 7058 ctl_cnt++; 7059 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 7060 cookie = 1; 7061 no_out_cnt = 1; 7062 } else if (chk->rec.chunk_id.id == SCTP_ASCONF) { 7063 /* 7064 * set hb flag since we can 7065 * use these for RTO 7066 */ 7067 hbflag = 1; 7068 asconf = 1; 7069 } 7070 chk->sent = SCTP_DATAGRAM_SENT; 7071 chk->snd_count++; 7072 } 7073 if (mtu == 0) { 7074 /* 7075 * Ok we are out of room but we can 7076 * output without effecting the 7077 * flight size since this little guy 7078 * is a control only packet. 7079 */ 7080 if (asconf) { 7081 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 7082 asconf = 0; 7083 } 7084 if (cookie) { 7085 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 7086 cookie = 0; 7087 } 7088 SCTP_BUF_PREPEND(outchain, sizeof(struct sctphdr), M_DONTWAIT); 7089 if (outchain == NULL) { 7090 /* no memory */ 7091 error = ENOBUFS; 7092 goto error_out_again; 7093 } 7094 shdr = mtod(outchain, struct sctphdr *); 7095 shdr->src_port = inp->sctp_lport; 7096 shdr->dest_port = stcb->rport; 7097 shdr->v_tag = htonl(stcb->asoc.peer_vtag); 7098 shdr->checksum = 0; 7099 auth_offset += sizeof(struct sctphdr); 7100 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 7101 (struct sockaddr *)&net->ro._l_addr, 7102 outchain, auth_offset, auth, 7103 no_fragmentflg, 0, NULL, asconf))) { 7104 if (error == ENOBUFS) { 7105 asoc->ifp_had_enobuf = 1; 7106 SCTP_STAT_INCR(sctps_lowlevelerr); 7107 } 7108 if (from_where == 0) { 7109 SCTP_STAT_INCR(sctps_lowlevelerrusr); 7110 } 7111 error_out_again: 7112 /* error, could not output */ 7113 if (hbflag) { 7114 if (*now_filled == 0) { 7115 SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 7116 *now_filled = 1; 7117 *now = net->last_sent_time; 7118 } else { 7119 net->last_sent_time = *now; 7120 } 7121 hbflag = 0; 7122 } 7123 if (error == EHOSTUNREACH) { 7124 /* 7125 * Destination went 7126 * unreachable 7127 * during this send 7128 */ 7129 sctp_move_to_an_alt(stcb, asoc, net); 7130 } 7131 *reason_code = 7; 7132 continue; 7133 } else 7134 asoc->ifp_had_enobuf = 0; 7135 /* Only HB or ASCONF advances time */ 7136 if (hbflag) { 7137 if (*now_filled == 0) { 7138 SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 7139 *now_filled = 1; 7140 *now = net->last_sent_time; 7141 } else { 7142 net->last_sent_time = *now; 7143 } 7144 hbflag = 0; 7145 } 7146 /* 7147 * increase the number we sent, if a 7148 * cookie is sent we don't tell them 7149 * any was sent out. 7150 */ 7151 outchain = endoutchain = NULL; 7152 auth = NULL; 7153 auth_offset = 0; 7154 if (!no_out_cnt) 7155 *num_out += ctl_cnt; 7156 /* recalc a clean slate and setup */ 7157 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 7158 mtu = (net->mtu - SCTP_MIN_OVERHEAD); 7159 } else { 7160 mtu = (net->mtu - SCTP_MIN_V4_OVERHEAD); 7161 } 7162 to_out = 0; 7163 no_fragmentflg = 1; 7164 } 7165 } 7166 } 7167 /*********************/ 7168 /* Data transmission */ 7169 /*********************/ 7170 /* 7171 * if AUTH for DATA is required and no AUTH has been added 7172 * yet, account for this in the mtu now... if no data can be 7173 * bundled, this adjustment won't matter anyways since the 7174 * packet will be going out... 7175 */ 7176 if ((auth == NULL) && 7177 sctp_auth_is_required_chunk(SCTP_DATA, 7178 stcb->asoc.peer_auth_chunks)) { 7179 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 7180 } 7181 /* now lets add any data within the MTU constraints */ 7182 if (((struct sockaddr *)&net->ro._l_addr)->sa_family == AF_INET) { 7183 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr))) 7184 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr)); 7185 else 7186 omtu = 0; 7187 } else { 7188 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr))) 7189 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)); 7190 else 7191 omtu = 0; 7192 } 7193 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) && (skip_data_for_this_net == 0)) || 7194 (cookie)) { 7195 for (chk = TAILQ_FIRST(&asoc->send_queue); chk; chk = nchk) { 7196 if (no_data_chunks) { 7197 /* let only control go out */ 7198 *reason_code = 1; 7199 break; 7200 } 7201 if (net->flight_size >= net->cwnd) { 7202 /* skip this net, no room for data */ 7203 *reason_code = 2; 7204 break; 7205 } 7206 nchk = TAILQ_NEXT(chk, sctp_next); 7207 if (chk->whoTo != net) { 7208 /* No, not sent to this net */ 7209 continue; 7210 } 7211 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) { 7212 /*- 7213 * strange, we have a chunk that is 7214 * to big for its destination and 7215 * yet no fragment ok flag. 7216 * Something went wrong when the 7217 * PMTU changed...we did not mark 7218 * this chunk for some reason?? I 7219 * will fix it here by letting IP 7220 * fragment it for now and printing 7221 * a warning. This really should not 7222 * happen ... 7223 */ 7224 #ifdef SCTP_DEBUG 7225 printf("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n", 7226 chk->send_size, mtu); 7227 #endif 7228 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 7229 } 7230 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) || 7231 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) { 7232 /* ok we will add this one */ 7233 7234 /* 7235 * Add an AUTH chunk, if chunk 7236 * requires it, save the offset into 7237 * the chain for AUTH 7238 */ 7239 if ((auth == NULL) && 7240 (sctp_auth_is_required_chunk(SCTP_DATA, 7241 stcb->asoc.peer_auth_chunks))) { 7242 7243 outchain = sctp_add_auth_chunk(outchain, 7244 &endoutchain, 7245 &auth, 7246 &auth_offset, 7247 stcb, 7248 SCTP_DATA); 7249 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 7250 } 7251 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0, 7252 chk->send_size, chk->copy_by_ref); 7253 if (outchain == NULL) { 7254 #ifdef SCTP_DEBUG 7255 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 7256 printf("No memory?\n"); 7257 } 7258 #endif 7259 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 7260 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 7261 } 7262 *reason_code = 3; 7263 return (ENOMEM); 7264 } 7265 /* upate our MTU size */ 7266 /* Do clear IP_DF ? */ 7267 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 7268 no_fragmentflg = 0; 7269 } 7270 /* unsigned subtraction of mtu */ 7271 if (mtu > chk->send_size) 7272 mtu -= chk->send_size; 7273 else 7274 mtu = 0; 7275 /* unsigned subtraction of r_mtu */ 7276 if (r_mtu > chk->send_size) 7277 r_mtu -= chk->send_size; 7278 else 7279 r_mtu = 0; 7280 7281 to_out += chk->send_size; 7282 if (to_out > mx_mtu) { 7283 #ifdef INVARIANTS 7284 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out); 7285 #else 7286 printf("Exceeding mtu of %d out size is %d\n", 7287 mx_mtu, to_out); 7288 #endif 7289 } 7290 chk->window_probe = 0; 7291 data_list[bundle_at++] = chk; 7292 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 7293 mtu = 0; 7294 break; 7295 } 7296 if (chk->sent == SCTP_DATAGRAM_UNSENT) { 7297 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) { 7298 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks); 7299 } else { 7300 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks); 7301 } 7302 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) && 7303 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0)) 7304 /* 7305 * Count number of 7306 * user msg's that 7307 * were fragmented 7308 * we do this by 7309 * counting when we 7310 * see a LAST 7311 * fragment only. 7312 */ 7313 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs); 7314 } 7315 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) { 7316 if (one_chunk) { 7317 data_list[0]->window_probe = 1; 7318 net->window_probe = 1; 7319 } 7320 break; 7321 } 7322 } else { 7323 /* 7324 * Must be sent in order of the 7325 * TSN's (on a network) 7326 */ 7327 break; 7328 } 7329 } /* for (chunk gather loop for this net) */ 7330 } /* if asoc.state OPEN */ 7331 /* Is there something to send for this destination? */ 7332 if (outchain) { 7333 /* We may need to start a control timer or two */ 7334 if (asconf) { 7335 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 7336 asconf = 0; 7337 } 7338 if (cookie) { 7339 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 7340 cookie = 0; 7341 } 7342 /* must start a send timer if data is being sent */ 7343 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) { 7344 /* 7345 * no timer running on this destination 7346 * restart it. 7347 */ 7348 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 7349 } 7350 /* Now send it, if there is anything to send :> */ 7351 SCTP_BUF_PREPEND(outchain, sizeof(struct sctphdr), M_DONTWAIT); 7352 if (outchain == NULL) { 7353 /* out of mbufs */ 7354 error = ENOBUFS; 7355 goto errored_send; 7356 } 7357 shdr = mtod(outchain, struct sctphdr *); 7358 shdr->src_port = inp->sctp_lport; 7359 shdr->dest_port = stcb->rport; 7360 shdr->v_tag = htonl(stcb->asoc.peer_vtag); 7361 shdr->checksum = 0; 7362 auth_offset += sizeof(struct sctphdr); 7363 if ((error = sctp_lowlevel_chunk_output(inp, 7364 stcb, 7365 net, 7366 (struct sockaddr *)&net->ro._l_addr, 7367 outchain, 7368 auth_offset, 7369 auth, 7370 no_fragmentflg, 7371 bundle_at, 7372 data_list[0], 7373 asconf))) { 7374 /* error, we could not output */ 7375 if (error == ENOBUFS) { 7376 SCTP_STAT_INCR(sctps_lowlevelerr); 7377 asoc->ifp_had_enobuf = 1; 7378 } 7379 if (from_where == 0) { 7380 SCTP_STAT_INCR(sctps_lowlevelerrusr); 7381 } 7382 errored_send: 7383 #ifdef SCTP_DEBUG 7384 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 7385 printf("Gak send error %d\n", error); 7386 } 7387 #endif 7388 if (hbflag) { 7389 if (*now_filled == 0) { 7390 SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 7391 *now_filled = 1; 7392 *now = net->last_sent_time; 7393 } else { 7394 net->last_sent_time = *now; 7395 } 7396 hbflag = 0; 7397 } 7398 if (error == EHOSTUNREACH) { 7399 /* 7400 * Destination went unreachable 7401 * during this send 7402 */ 7403 sctp_move_to_an_alt(stcb, asoc, net); 7404 } 7405 *reason_code = 6; 7406 /*- 7407 * I add this line to be paranoid. As far as 7408 * I can tell the continue, takes us back to 7409 * the top of the for, but just to make sure 7410 * I will reset these again here. 7411 */ 7412 ctl_cnt = bundle_at = 0; 7413 continue; /* This takes us back to the 7414 * for() for the nets. */ 7415 } else { 7416 asoc->ifp_had_enobuf = 0; 7417 } 7418 outchain = endoutchain = NULL; 7419 auth = NULL; 7420 auth_offset = 0; 7421 if (bundle_at || hbflag) { 7422 /* For data/asconf and hb set time */ 7423 if (*now_filled == 0) { 7424 SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 7425 *now_filled = 1; 7426 *now = net->last_sent_time; 7427 } else { 7428 net->last_sent_time = *now; 7429 } 7430 } 7431 if (!no_out_cnt) { 7432 *num_out += (ctl_cnt + bundle_at); 7433 } 7434 if (bundle_at) { 7435 /* setup for a RTO measurement */ 7436 tsns_sent = data_list[0]->rec.data.TSN_seq; 7437 7438 data_list[0]->do_rtt = 1; 7439 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at); 7440 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net); 7441 if (sctp_early_fr) { 7442 if (net->flight_size < net->cwnd) { 7443 /* start or restart it */ 7444 if (SCTP_OS_TIMER_PENDING(&net->fr_timer.timer)) { 7445 sctp_timer_stop(SCTP_TIMER_TYPE_EARLYFR, inp, stcb, net, 7446 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2); 7447 } 7448 SCTP_STAT_INCR(sctps_earlyfrstrout); 7449 sctp_timer_start(SCTP_TIMER_TYPE_EARLYFR, inp, stcb, net); 7450 } else { 7451 /* stop it if its running */ 7452 if (SCTP_OS_TIMER_PENDING(&net->fr_timer.timer)) { 7453 SCTP_STAT_INCR(sctps_earlyfrstpout); 7454 sctp_timer_stop(SCTP_TIMER_TYPE_EARLYFR, inp, stcb, net, 7455 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3); 7456 } 7457 } 7458 } 7459 } 7460 if (one_chunk) { 7461 break; 7462 } 7463 } 7464 #ifdef SCTP_CWND_LOGGING 7465 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND); 7466 #endif 7467 } 7468 if (old_startat == NULL) { 7469 old_startat = send_start_at; 7470 send_start_at = TAILQ_FIRST(&asoc->nets); 7471 goto again_one_more_time; 7472 } 7473 /* 7474 * At the end there should be no NON timed chunks hanging on this 7475 * queue. 7476 */ 7477 #ifdef SCTP_CWND_LOGGING 7478 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND); 7479 #endif 7480 if ((*num_out == 0) && (*reason_code == 0)) { 7481 *reason_code = 4; 7482 } else { 7483 *reason_code = 5; 7484 } 7485 sctp_clean_up_ctl(stcb, asoc); 7486 return (0); 7487 } 7488 7489 void 7490 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err) 7491 { 7492 /*- 7493 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of 7494 * the control chunk queue. 7495 */ 7496 struct sctp_chunkhdr *hdr; 7497 struct sctp_tmit_chunk *chk; 7498 struct mbuf *mat; 7499 7500 SCTP_TCB_LOCK_ASSERT(stcb); 7501 sctp_alloc_a_chunk(stcb, chk); 7502 if (chk == NULL) { 7503 /* no memory */ 7504 sctp_m_freem(op_err); 7505 return; 7506 } 7507 chk->copy_by_ref = 0; 7508 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT); 7509 if (op_err == NULL) { 7510 sctp_free_a_chunk(stcb, chk); 7511 return; 7512 } 7513 chk->send_size = 0; 7514 mat = op_err; 7515 while (mat != NULL) { 7516 chk->send_size += SCTP_BUF_LEN(mat); 7517 mat = SCTP_BUF_NEXT(mat); 7518 } 7519 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR; 7520 chk->rec.chunk_id.can_take_data = 1; 7521 chk->sent = SCTP_DATAGRAM_UNSENT; 7522 chk->snd_count = 0; 7523 chk->flags = 0; 7524 chk->asoc = &stcb->asoc; 7525 chk->data = op_err; 7526 chk->whoTo = chk->asoc->primary_destination; 7527 atomic_add_int(&chk->whoTo->ref_count, 1); 7528 hdr = mtod(op_err, struct sctp_chunkhdr *); 7529 hdr->chunk_type = SCTP_OPERATION_ERROR; 7530 hdr->chunk_flags = 0; 7531 hdr->chunk_length = htons(chk->send_size); 7532 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, 7533 chk, 7534 sctp_next); 7535 chk->asoc->ctrl_queue_cnt++; 7536 } 7537 7538 int 7539 sctp_send_cookie_echo(struct mbuf *m, 7540 int offset, 7541 struct sctp_tcb *stcb, 7542 struct sctp_nets *net) 7543 { 7544 /*- 7545 * pull out the cookie and put it at the front of the control chunk 7546 * queue. 7547 */ 7548 int at; 7549 struct mbuf *cookie; 7550 struct sctp_paramhdr parm, *phdr; 7551 struct sctp_chunkhdr *hdr; 7552 struct sctp_tmit_chunk *chk; 7553 uint16_t ptype, plen; 7554 7555 /* First find the cookie in the param area */ 7556 cookie = NULL; 7557 at = offset + sizeof(struct sctp_init_chunk); 7558 7559 SCTP_TCB_LOCK_ASSERT(stcb); 7560 do { 7561 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm)); 7562 if (phdr == NULL) { 7563 return (-3); 7564 } 7565 ptype = ntohs(phdr->param_type); 7566 plen = ntohs(phdr->param_length); 7567 if (ptype == SCTP_STATE_COOKIE) { 7568 int pad; 7569 7570 /* found the cookie */ 7571 if ((pad = (plen % 4))) { 7572 plen += 4 - pad; 7573 } 7574 cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT); 7575 if (cookie == NULL) { 7576 /* No memory */ 7577 return (-2); 7578 } 7579 break; 7580 } 7581 at += SCTP_SIZE32(plen); 7582 } while (phdr); 7583 if (cookie == NULL) { 7584 /* Did not find the cookie */ 7585 return (-3); 7586 } 7587 /* ok, we got the cookie lets change it into a cookie echo chunk */ 7588 7589 /* first the change from param to cookie */ 7590 hdr = mtod(cookie, struct sctp_chunkhdr *); 7591 hdr->chunk_type = SCTP_COOKIE_ECHO; 7592 hdr->chunk_flags = 0; 7593 /* get the chunk stuff now and place it in the FRONT of the queue */ 7594 sctp_alloc_a_chunk(stcb, chk); 7595 if (chk == NULL) { 7596 /* no memory */ 7597 sctp_m_freem(cookie); 7598 return (-5); 7599 } 7600 chk->copy_by_ref = 0; 7601 chk->send_size = plen; 7602 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO; 7603 chk->rec.chunk_id.can_take_data = 0; 7604 chk->sent = SCTP_DATAGRAM_UNSENT; 7605 chk->snd_count = 0; 7606 chk->flags = 0; 7607 chk->asoc = &stcb->asoc; 7608 chk->data = cookie; 7609 chk->whoTo = chk->asoc->primary_destination; 7610 atomic_add_int(&chk->whoTo->ref_count, 1); 7611 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next); 7612 chk->asoc->ctrl_queue_cnt++; 7613 return (0); 7614 } 7615 7616 void 7617 sctp_send_heartbeat_ack(struct sctp_tcb *stcb, 7618 struct mbuf *m, 7619 int offset, 7620 int chk_length, 7621 struct sctp_nets *net) 7622 { 7623 /* 7624 * take a HB request and make it into a HB ack and send it. 7625 */ 7626 struct mbuf *outchain; 7627 struct sctp_chunkhdr *chdr; 7628 struct sctp_tmit_chunk *chk; 7629 7630 7631 if (net == NULL) 7632 /* must have a net pointer */ 7633 return; 7634 7635 outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT); 7636 if (outchain == NULL) { 7637 /* gak out of memory */ 7638 return; 7639 } 7640 chdr = mtod(outchain, struct sctp_chunkhdr *); 7641 chdr->chunk_type = SCTP_HEARTBEAT_ACK; 7642 chdr->chunk_flags = 0; 7643 if (chk_length % 4) { 7644 /* need pad */ 7645 uint32_t cpthis = 0; 7646 int padlen; 7647 7648 padlen = 4 - (chk_length % 4); 7649 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis); 7650 } 7651 sctp_alloc_a_chunk(stcb, chk); 7652 if (chk == NULL) { 7653 /* no memory */ 7654 sctp_m_freem(outchain); 7655 return; 7656 } 7657 chk->copy_by_ref = 0; 7658 chk->send_size = chk_length; 7659 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK; 7660 chk->rec.chunk_id.can_take_data = 1; 7661 chk->sent = SCTP_DATAGRAM_UNSENT; 7662 chk->snd_count = 0; 7663 chk->flags = 0; 7664 chk->asoc = &stcb->asoc; 7665 chk->data = outchain; 7666 chk->whoTo = net; 7667 atomic_add_int(&chk->whoTo->ref_count, 1); 7668 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 7669 chk->asoc->ctrl_queue_cnt++; 7670 } 7671 7672 int 7673 sctp_send_cookie_ack(struct sctp_tcb *stcb) 7674 { 7675 /* formulate and queue a cookie-ack back to sender */ 7676 struct mbuf *cookie_ack; 7677 struct sctp_chunkhdr *hdr; 7678 struct sctp_tmit_chunk *chk; 7679 7680 cookie_ack = NULL; 7681 SCTP_TCB_LOCK_ASSERT(stcb); 7682 7683 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER); 7684 if (cookie_ack == NULL) { 7685 /* no mbuf's */ 7686 return (-1); 7687 } 7688 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD); 7689 sctp_alloc_a_chunk(stcb, chk); 7690 if (chk == NULL) { 7691 /* no memory */ 7692 sctp_m_freem(cookie_ack); 7693 return (-1); 7694 } 7695 chk->copy_by_ref = 0; 7696 chk->send_size = sizeof(struct sctp_chunkhdr); 7697 chk->rec.chunk_id.id = SCTP_COOKIE_ACK; 7698 chk->rec.chunk_id.can_take_data = 1; 7699 chk->sent = SCTP_DATAGRAM_UNSENT; 7700 chk->snd_count = 0; 7701 chk->flags = 0; 7702 chk->asoc = &stcb->asoc; 7703 chk->data = cookie_ack; 7704 if (chk->asoc->last_control_chunk_from != NULL) { 7705 chk->whoTo = chk->asoc->last_control_chunk_from; 7706 } else { 7707 chk->whoTo = chk->asoc->primary_destination; 7708 } 7709 atomic_add_int(&chk->whoTo->ref_count, 1); 7710 hdr = mtod(cookie_ack, struct sctp_chunkhdr *); 7711 hdr->chunk_type = SCTP_COOKIE_ACK; 7712 hdr->chunk_flags = 0; 7713 hdr->chunk_length = htons(chk->send_size); 7714 SCTP_BUF_LEN(cookie_ack) = chk->send_size; 7715 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 7716 chk->asoc->ctrl_queue_cnt++; 7717 return (0); 7718 } 7719 7720 7721 int 7722 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net) 7723 { 7724 /* formulate and queue a SHUTDOWN-ACK back to the sender */ 7725 struct mbuf *m_shutdown_ack; 7726 struct sctp_shutdown_ack_chunk *ack_cp; 7727 struct sctp_tmit_chunk *chk; 7728 7729 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER); 7730 if (m_shutdown_ack == NULL) { 7731 /* no mbuf's */ 7732 return (-1); 7733 } 7734 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD); 7735 sctp_alloc_a_chunk(stcb, chk); 7736 if (chk == NULL) { 7737 /* no memory */ 7738 sctp_m_freem(m_shutdown_ack); 7739 return (-1); 7740 } 7741 chk->copy_by_ref = 0; 7742 7743 chk->send_size = sizeof(struct sctp_chunkhdr); 7744 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK; 7745 chk->rec.chunk_id.can_take_data = 1; 7746 chk->sent = SCTP_DATAGRAM_UNSENT; 7747 chk->snd_count = 0; 7748 chk->flags = 0; 7749 chk->asoc = &stcb->asoc; 7750 chk->data = m_shutdown_ack; 7751 chk->whoTo = net; 7752 atomic_add_int(&net->ref_count, 1); 7753 7754 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *); 7755 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK; 7756 ack_cp->ch.chunk_flags = 0; 7757 ack_cp->ch.chunk_length = htons(chk->send_size); 7758 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size; 7759 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 7760 chk->asoc->ctrl_queue_cnt++; 7761 return (0); 7762 } 7763 7764 int 7765 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net) 7766 { 7767 /* formulate and queue a SHUTDOWN to the sender */ 7768 struct mbuf *m_shutdown; 7769 struct sctp_shutdown_chunk *shutdown_cp; 7770 struct sctp_tmit_chunk *chk; 7771 7772 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER); 7773 if (m_shutdown == NULL) { 7774 /* no mbuf's */ 7775 return (-1); 7776 } 7777 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD); 7778 sctp_alloc_a_chunk(stcb, chk); 7779 if (chk == NULL) { 7780 /* no memory */ 7781 sctp_m_freem(m_shutdown); 7782 return (-1); 7783 } 7784 chk->copy_by_ref = 0; 7785 chk->send_size = sizeof(struct sctp_shutdown_chunk); 7786 chk->rec.chunk_id.id = SCTP_SHUTDOWN; 7787 chk->rec.chunk_id.can_take_data = 1; 7788 chk->sent = SCTP_DATAGRAM_UNSENT; 7789 chk->snd_count = 0; 7790 chk->flags = 0; 7791 chk->asoc = &stcb->asoc; 7792 chk->data = m_shutdown; 7793 chk->whoTo = net; 7794 atomic_add_int(&net->ref_count, 1); 7795 7796 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *); 7797 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN; 7798 shutdown_cp->ch.chunk_flags = 0; 7799 shutdown_cp->ch.chunk_length = htons(chk->send_size); 7800 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn); 7801 SCTP_BUF_LEN(m_shutdown) = chk->send_size; 7802 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 7803 chk->asoc->ctrl_queue_cnt++; 7804 return (0); 7805 } 7806 7807 int 7808 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net) 7809 { 7810 /* 7811 * formulate and queue an ASCONF to the peer ASCONF parameters 7812 * should be queued on the assoc queue 7813 */ 7814 struct sctp_tmit_chunk *chk; 7815 struct mbuf *m_asconf; 7816 struct sctp_asconf_chunk *acp; 7817 int len; 7818 7819 7820 SCTP_TCB_LOCK_ASSERT(stcb); 7821 /* compose an ASCONF chunk, maximum length is PMTU */ 7822 m_asconf = sctp_compose_asconf(stcb, &len); 7823 if (m_asconf == NULL) { 7824 return (-1); 7825 } 7826 acp = mtod(m_asconf, struct sctp_asconf_chunk *); 7827 sctp_alloc_a_chunk(stcb, chk); 7828 if (chk == NULL) { 7829 /* no memory */ 7830 sctp_m_freem(m_asconf); 7831 return (-1); 7832 } 7833 chk->copy_by_ref = 0; 7834 chk->data = m_asconf; 7835 chk->send_size = len; 7836 chk->rec.chunk_id.id = SCTP_ASCONF; 7837 chk->rec.chunk_id.can_take_data = 0; 7838 chk->sent = SCTP_DATAGRAM_UNSENT; 7839 chk->snd_count = 0; 7840 chk->flags = 0; 7841 chk->asoc = &stcb->asoc; 7842 chk->whoTo = chk->asoc->primary_destination; 7843 atomic_add_int(&chk->whoTo->ref_count, 1); 7844 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 7845 chk->asoc->ctrl_queue_cnt++; 7846 return (0); 7847 } 7848 7849 int 7850 sctp_send_asconf_ack(struct sctp_tcb *stcb, uint32_t retrans) 7851 { 7852 /* 7853 * formulate and queue a asconf-ack back to sender the asconf-ack 7854 * must be stored in the tcb 7855 */ 7856 struct sctp_tmit_chunk *chk; 7857 struct mbuf *m_ack, *m; 7858 7859 SCTP_TCB_LOCK_ASSERT(stcb); 7860 /* is there a asconf-ack mbuf chain to send? */ 7861 if (stcb->asoc.last_asconf_ack_sent == NULL) { 7862 return (-1); 7863 } 7864 /* copy the asconf_ack */ 7865 m_ack = SCTP_M_COPYM(stcb->asoc.last_asconf_ack_sent, 0, M_COPYALL, M_DONTWAIT); 7866 if (m_ack == NULL) { 7867 /* couldn't copy it */ 7868 7869 return (-1); 7870 } 7871 sctp_alloc_a_chunk(stcb, chk); 7872 if (chk == NULL) { 7873 /* no memory */ 7874 if (m_ack) 7875 sctp_m_freem(m_ack); 7876 return (-1); 7877 } 7878 chk->copy_by_ref = 0; 7879 /* figure out where it goes to */ 7880 if (retrans) { 7881 /* we're doing a retransmission */ 7882 if (stcb->asoc.used_alt_asconfack > 2) { 7883 /* tried alternate nets already, go back */ 7884 chk->whoTo = NULL; 7885 } else { 7886 /* need to try and alternate net */ 7887 chk->whoTo = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0); 7888 stcb->asoc.used_alt_asconfack++; 7889 } 7890 if (chk->whoTo == NULL) { 7891 /* no alternate */ 7892 if (stcb->asoc.last_control_chunk_from == NULL) 7893 chk->whoTo = stcb->asoc.primary_destination; 7894 else 7895 chk->whoTo = stcb->asoc.last_control_chunk_from; 7896 stcb->asoc.used_alt_asconfack = 0; 7897 } 7898 } else { 7899 /* normal case */ 7900 if (stcb->asoc.last_control_chunk_from == NULL) 7901 chk->whoTo = stcb->asoc.primary_destination; 7902 else 7903 chk->whoTo = stcb->asoc.last_control_chunk_from; 7904 stcb->asoc.used_alt_asconfack = 0; 7905 } 7906 chk->data = m_ack; 7907 chk->send_size = 0; 7908 /* Get size */ 7909 m = m_ack; 7910 while (m) { 7911 chk->send_size += SCTP_BUF_LEN(m); 7912 m = SCTP_BUF_NEXT(m); 7913 } 7914 chk->rec.chunk_id.id = SCTP_ASCONF_ACK; 7915 chk->rec.chunk_id.can_take_data = 1; 7916 chk->sent = SCTP_DATAGRAM_UNSENT; 7917 chk->snd_count = 0; 7918 chk->flags = 0; 7919 chk->asoc = &stcb->asoc; 7920 atomic_add_int(&chk->whoTo->ref_count, 1); 7921 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 7922 chk->asoc->ctrl_queue_cnt++; 7923 return (0); 7924 } 7925 7926 7927 static int 7928 sctp_chunk_retransmission(struct sctp_inpcb *inp, 7929 struct sctp_tcb *stcb, 7930 struct sctp_association *asoc, 7931 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done) 7932 { 7933 /*- 7934 * send out one MTU of retransmission. If fast_retransmit is 7935 * happening we ignore the cwnd. Otherwise we obey the cwnd and 7936 * rwnd. For a Cookie or Asconf in the control chunk queue we 7937 * retransmit them by themselves. 7938 * 7939 * For data chunks we will pick out the lowest TSN's in the sent_queue 7940 * marked for resend and bundle them all together (up to a MTU of 7941 * destination). The address to send to should have been 7942 * selected/changed where the retransmission was marked (i.e. in FR 7943 * or t3-timeout routines). 7944 */ 7945 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 7946 struct sctp_tmit_chunk *chk, *fwd; 7947 struct mbuf *m, *endofchain; 7948 struct sctphdr *shdr; 7949 int asconf; 7950 struct sctp_nets *net; 7951 uint32_t tsns_sent = 0; 7952 int no_fragmentflg, bundle_at, cnt_thru; 7953 unsigned int mtu; 7954 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started; 7955 struct sctp_auth_chunk *auth = NULL; 7956 uint32_t auth_offset = 0; 7957 uint32_t dmtu = 0; 7958 7959 SCTP_TCB_LOCK_ASSERT(stcb); 7960 tmr_started = ctl_cnt = bundle_at = error = 0; 7961 no_fragmentflg = 1; 7962 asconf = 0; 7963 fwd_tsn = 0; 7964 *cnt_out = 0; 7965 fwd = NULL; 7966 endofchain = m = NULL; 7967 #ifdef SCTP_AUDITING_ENABLED 7968 sctp_audit_log(0xC3, 1); 7969 #endif 7970 if (TAILQ_EMPTY(&asoc->sent_queue)) { 7971 #ifdef SCTP_DEBUG 7972 if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) { 7973 printf("SCTP hits empty queue with cnt set to %d?\n", 7974 asoc->sent_queue_retran_cnt); 7975 } 7976 #endif 7977 asoc->sent_queue_cnt = 0; 7978 asoc->sent_queue_cnt_removeable = 0; 7979 } 7980 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7981 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) || 7982 (chk->rec.chunk_id.id == SCTP_ASCONF) || 7983 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) || 7984 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) { 7985 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 7986 if (chk != asoc->str_reset) { 7987 /* 7988 * not eligible for retran if its 7989 * not ours 7990 */ 7991 continue; 7992 } 7993 } 7994 ctl_cnt++; 7995 if (chk->rec.chunk_id.id == SCTP_ASCONF) { 7996 no_fragmentflg = 1; 7997 asconf = 1; 7998 } 7999 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 8000 fwd_tsn = 1; 8001 fwd = chk; 8002 } 8003 /* 8004 * Add an AUTH chunk, if chunk requires it save the 8005 * offset into the chain for AUTH 8006 */ 8007 if ((auth == NULL) && 8008 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8009 stcb->asoc.peer_auth_chunks))) { 8010 m = sctp_add_auth_chunk(m, &endofchain, 8011 &auth, &auth_offset, 8012 stcb, 8013 chk->rec.chunk_id.id); 8014 } 8015 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 8016 break; 8017 } 8018 } 8019 one_chunk = 0; 8020 cnt_thru = 0; 8021 /* do we have control chunks to retransmit? */ 8022 if (m != NULL) { 8023 /* Start a timer no matter if we suceed or fail */ 8024 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 8025 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo); 8026 } else if (chk->rec.chunk_id.id == SCTP_ASCONF) 8027 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo); 8028 8029 SCTP_BUF_PREPEND(m, sizeof(struct sctphdr), M_DONTWAIT); 8030 if (m == NULL) { 8031 return (ENOBUFS); 8032 } 8033 shdr = mtod(m, struct sctphdr *); 8034 shdr->src_port = inp->sctp_lport; 8035 shdr->dest_port = stcb->rport; 8036 shdr->v_tag = htonl(stcb->asoc.peer_vtag); 8037 shdr->checksum = 0; 8038 auth_offset += sizeof(struct sctphdr); 8039 chk->snd_count++; /* update our count */ 8040 8041 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo, 8042 (struct sockaddr *)&chk->whoTo->ro._l_addr, m, auth_offset, 8043 auth, no_fragmentflg, 0, NULL, asconf))) { 8044 SCTP_STAT_INCR(sctps_lowlevelerr); 8045 return (error); 8046 } 8047 m = endofchain = NULL; 8048 auth = NULL; 8049 auth_offset = 0; 8050 /* 8051 * We don't want to mark the net->sent time here since this 8052 * we use this for HB and retrans cannot measure RTT 8053 */ 8054 /* SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */ 8055 *cnt_out += 1; 8056 chk->sent = SCTP_DATAGRAM_SENT; 8057 sctp_ucount_decr(asoc->sent_queue_retran_cnt); 8058 if (fwd_tsn == 0) { 8059 return (0); 8060 } else { 8061 /* Clean up the fwd-tsn list */ 8062 sctp_clean_up_ctl(stcb, asoc); 8063 return (0); 8064 } 8065 } 8066 /* 8067 * Ok, it is just data retransmission we need to do or that and a 8068 * fwd-tsn with it all. 8069 */ 8070 if (TAILQ_EMPTY(&asoc->sent_queue)) { 8071 return (SCTP_RETRAN_DONE); 8072 } 8073 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) || 8074 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) { 8075 /* not yet open, resend the cookie and that is it */ 8076 return (1); 8077 } 8078 #ifdef SCTP_AUDITING_ENABLED 8079 sctp_auditing(20, inp, stcb, NULL); 8080 #endif 8081 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 8082 if (chk->sent != SCTP_DATAGRAM_RESEND) { 8083 /* No, not sent to this net or not ready for rtx */ 8084 continue; 8085 8086 } 8087 if ((sctp_max_retran_chunk) && (chk->snd_count >= sctp_max_retran_chunk)) { 8088 /* Gak, we have exceeded max unlucky retran, abort! */ 8089 8090 #ifdef SCTP_DEBUG 8091 printf("Gak, chk->snd_count:%d >= max:%d - send abort\n", 8092 chk->snd_count, 8093 sctp_max_retran_chunk); 8094 #endif 8095 sctp_send_abort_tcb(stcb, NULL); 8096 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 8097 return (SCTP_RETRAN_EXIT); 8098 } 8099 /* pick up the net */ 8100 net = chk->whoTo; 8101 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 8102 mtu = (net->mtu - SCTP_MIN_OVERHEAD); 8103 } else { 8104 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8105 } 8106 8107 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) { 8108 /* No room in peers rwnd */ 8109 uint32_t tsn; 8110 8111 tsn = asoc->last_acked_seq + 1; 8112 if (tsn == chk->rec.data.TSN_seq) { 8113 /* 8114 * we make a special exception for this 8115 * case. The peer has no rwnd but is missing 8116 * the lowest chunk.. which is probably what 8117 * is holding up the rwnd. 8118 */ 8119 goto one_chunk_around; 8120 } 8121 return (1); 8122 } 8123 one_chunk_around: 8124 if (asoc->peers_rwnd < mtu) { 8125 one_chunk = 1; 8126 if ((asoc->peers_rwnd == 0) && 8127 (asoc->total_flight == 0)) { 8128 chk->window_probe = 1; 8129 chk->whoTo->window_probe = 1; 8130 } 8131 } 8132 #ifdef SCTP_AUDITING_ENABLED 8133 sctp_audit_log(0xC3, 2); 8134 #endif 8135 bundle_at = 0; 8136 m = NULL; 8137 net->fast_retran_ip = 0; 8138 if (chk->rec.data.doing_fast_retransmit == 0) { 8139 /* 8140 * if no FR in progress skip destination that have 8141 * flight_size > cwnd. 8142 */ 8143 if (net->flight_size >= net->cwnd) { 8144 continue; 8145 } 8146 } else { 8147 /* 8148 * Mark the destination net to have FR recovery 8149 * limits put on it. 8150 */ 8151 *fr_done = 1; 8152 net->fast_retran_ip = 1; 8153 } 8154 8155 /* 8156 * if no AUTH is yet included and this chunk requires it, 8157 * make sure to account for it. We don't apply the size 8158 * until the AUTH chunk is actually added below in case 8159 * there is no room for this chunk. 8160 */ 8161 if ((auth == NULL) && 8162 sctp_auth_is_required_chunk(SCTP_DATA, 8163 stcb->asoc.peer_auth_chunks)) { 8164 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8165 } else 8166 dmtu = 0; 8167 8168 if ((chk->send_size <= (mtu - dmtu)) || 8169 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 8170 /* ok we will add this one */ 8171 if ((auth == NULL) && 8172 (sctp_auth_is_required_chunk(SCTP_DATA, 8173 stcb->asoc.peer_auth_chunks))) { 8174 m = sctp_add_auth_chunk(m, &endofchain, 8175 &auth, &auth_offset, 8176 stcb, SCTP_DATA); 8177 } 8178 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 8179 if (m == NULL) { 8180 return (ENOMEM); 8181 } 8182 /* Do clear IP_DF ? */ 8183 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8184 no_fragmentflg = 0; 8185 } 8186 /* upate our MTU size */ 8187 if (mtu > (chk->send_size + dmtu)) 8188 mtu -= (chk->send_size + dmtu); 8189 else 8190 mtu = 0; 8191 data_list[bundle_at++] = chk; 8192 if (one_chunk && (asoc->total_flight <= 0)) { 8193 SCTP_STAT_INCR(sctps_windowprobed); 8194 } 8195 } 8196 if (one_chunk == 0) { 8197 /* 8198 * now are there anymore forward from chk to pick 8199 * up? 8200 */ 8201 fwd = TAILQ_NEXT(chk, sctp_next); 8202 while (fwd) { 8203 if (fwd->sent != SCTP_DATAGRAM_RESEND) { 8204 /* Nope, not for retran */ 8205 fwd = TAILQ_NEXT(fwd, sctp_next); 8206 continue; 8207 } 8208 if (fwd->whoTo != net) { 8209 /* Nope, not the net in question */ 8210 fwd = TAILQ_NEXT(fwd, sctp_next); 8211 continue; 8212 } 8213 if ((auth == NULL) && 8214 sctp_auth_is_required_chunk(SCTP_DATA, 8215 stcb->asoc.peer_auth_chunks)) { 8216 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8217 } else 8218 dmtu = 0; 8219 if (fwd->send_size <= (mtu - dmtu)) { 8220 if ((auth == NULL) && 8221 (sctp_auth_is_required_chunk(SCTP_DATA, 8222 stcb->asoc.peer_auth_chunks))) { 8223 m = sctp_add_auth_chunk(m, 8224 &endofchain, 8225 &auth, &auth_offset, 8226 stcb, 8227 SCTP_DATA); 8228 } 8229 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref); 8230 if (m == NULL) { 8231 return (ENOMEM); 8232 } 8233 /* Do clear IP_DF ? */ 8234 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8235 no_fragmentflg = 0; 8236 } 8237 /* upate our MTU size */ 8238 if (mtu > (fwd->send_size + dmtu)) 8239 mtu -= (fwd->send_size + dmtu); 8240 else 8241 mtu = 0; 8242 data_list[bundle_at++] = fwd; 8243 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 8244 break; 8245 } 8246 fwd = TAILQ_NEXT(fwd, sctp_next); 8247 } else { 8248 /* can't fit so we are done */ 8249 break; 8250 } 8251 } 8252 } 8253 /* Is there something to send for this destination? */ 8254 if (m) { 8255 /* 8256 * No matter if we fail/or suceed we should start a 8257 * timer. A failure is like a lost IP packet :-) 8258 */ 8259 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 8260 /* 8261 * no timer running on this destination 8262 * restart it. 8263 */ 8264 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8265 tmr_started = 1; 8266 } 8267 SCTP_BUF_PREPEND(m, sizeof(struct sctphdr), M_DONTWAIT); 8268 if (m == NULL) { 8269 return (ENOBUFS); 8270 } 8271 shdr = mtod(m, struct sctphdr *); 8272 shdr->src_port = inp->sctp_lport; 8273 shdr->dest_port = stcb->rport; 8274 shdr->v_tag = htonl(stcb->asoc.peer_vtag); 8275 shdr->checksum = 0; 8276 auth_offset += sizeof(struct sctphdr); 8277 /* Now lets send it, if there is anything to send :> */ 8278 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 8279 (struct sockaddr *)&net->ro._l_addr, m, auth_offset, 8280 auth, no_fragmentflg, 0, NULL, asconf))) { 8281 /* error, we could not output */ 8282 SCTP_STAT_INCR(sctps_lowlevelerr); 8283 return (error); 8284 } 8285 m = endofchain = NULL; 8286 auth = NULL; 8287 auth_offset = 0; 8288 /* For HB's */ 8289 /* 8290 * We don't want to mark the net->sent time here 8291 * since this we use this for HB and retrans cannot 8292 * measure RTT 8293 */ 8294 /* SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */ 8295 8296 /* For auto-close */ 8297 cnt_thru++; 8298 if (*now_filled == 0) { 8299 SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); 8300 *now = asoc->time_last_sent; 8301 *now_filled = 1; 8302 } else { 8303 asoc->time_last_sent = *now; 8304 } 8305 *cnt_out += bundle_at; 8306 #ifdef SCTP_AUDITING_ENABLED 8307 sctp_audit_log(0xC4, bundle_at); 8308 #endif 8309 if (bundle_at) { 8310 tsns_sent = data_list[0]->rec.data.TSN_seq; 8311 } 8312 for (i = 0; i < bundle_at; i++) { 8313 SCTP_STAT_INCR(sctps_sendretransdata); 8314 data_list[i]->sent = SCTP_DATAGRAM_SENT; 8315 /* 8316 * When we have a revoked data, and we 8317 * retransmit it, then we clear the revoked 8318 * flag since this flag dictates if we 8319 * subtracted from the fs 8320 */ 8321 if (data_list[i]->rec.data.chunk_was_revoked) { 8322 /* Deflate the cwnd */ 8323 data_list[i]->whoTo->cwnd -= data_list[i]->book_size; 8324 data_list[i]->rec.data.chunk_was_revoked = 0; 8325 } 8326 data_list[i]->snd_count++; 8327 sctp_ucount_decr(asoc->sent_queue_retran_cnt); 8328 /* record the time */ 8329 data_list[i]->sent_rcv_time = asoc->time_last_sent; 8330 if (data_list[i]->book_size_scale) { 8331 /* 8332 * need to double the book size on 8333 * this one 8334 */ 8335 data_list[i]->book_size_scale = 0; 8336 /* 8337 * Since we double the booksize, we 8338 * must also double the output queue 8339 * size, since this get shrunk when 8340 * we free by this amount. 8341 */ 8342 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size); 8343 data_list[i]->book_size *= 2; 8344 8345 8346 } else { 8347 #ifdef SCTP_LOG_RWND 8348 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 8349 asoc->peers_rwnd, data_list[i]->send_size, sctp_peer_chunk_oh); 8350 #endif 8351 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 8352 (uint32_t) (data_list[i]->send_size + 8353 sctp_peer_chunk_oh)); 8354 } 8355 #ifdef SCTP_FLIGHT_LOGGING 8356 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND, 8357 data_list[i]->whoTo->flight_size, 8358 data_list[i]->book_size, 8359 (uintptr_t) data_list[i]->whoTo, 8360 data_list[i]->rec.data.TSN_seq); 8361 #endif 8362 sctp_flight_size_increase(data_list[i]); 8363 sctp_total_flight_increase(stcb, data_list[i]); 8364 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 8365 /* SWS sender side engages */ 8366 asoc->peers_rwnd = 0; 8367 } 8368 if ((i == 0) && 8369 (data_list[i]->rec.data.doing_fast_retransmit)) { 8370 SCTP_STAT_INCR(sctps_sendfastretrans); 8371 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) && 8372 (tmr_started == 0)) { 8373 /*- 8374 * ok we just fast-retrans'd 8375 * the lowest TSN, i.e the 8376 * first on the list. In 8377 * this case we want to give 8378 * some more time to get a 8379 * SACK back without a 8380 * t3-expiring. 8381 */ 8382 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net, 8383 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4); 8384 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8385 } 8386 } 8387 } 8388 #ifdef SCTP_CWND_LOGGING 8389 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND); 8390 #endif 8391 #ifdef SCTP_AUDITING_ENABLED 8392 sctp_auditing(21, inp, stcb, NULL); 8393 #endif 8394 } else { 8395 /* None will fit */ 8396 return (1); 8397 } 8398 if (asoc->sent_queue_retran_cnt <= 0) { 8399 /* all done we have no more to retran */ 8400 asoc->sent_queue_retran_cnt = 0; 8401 break; 8402 } 8403 if (one_chunk) { 8404 /* No more room in rwnd */ 8405 return (1); 8406 } 8407 /* stop the for loop here. we sent out a packet */ 8408 break; 8409 } 8410 return (0); 8411 } 8412 8413 8414 static int 8415 sctp_timer_validation(struct sctp_inpcb *inp, 8416 struct sctp_tcb *stcb, 8417 struct sctp_association *asoc, 8418 int ret) 8419 { 8420 struct sctp_nets *net; 8421 8422 /* Validate that a timer is running somewhere */ 8423 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 8424 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 8425 /* Here is a timer */ 8426 return (ret); 8427 } 8428 } 8429 SCTP_TCB_LOCK_ASSERT(stcb); 8430 /* Gak, we did not have a timer somewhere */ 8431 #ifdef SCTP_DEBUG 8432 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 8433 printf("Deadlock avoided starting timer on a dest at retran\n"); 8434 } 8435 #endif 8436 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination); 8437 return (ret); 8438 } 8439 8440 int 8441 sctp_chunk_output(struct sctp_inpcb *inp, 8442 struct sctp_tcb *stcb, 8443 int from_where) 8444 { 8445 /*- 8446 * Ok this is the generic chunk service queue. we must do the 8447 * following: - See if there are retransmits pending, if so we must 8448 * do these first and return. - Service the stream queue that is 8449 * next, moving any message (note I must get a complete message i.e. 8450 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning 8451 * TSN's - Check to see if the cwnd/rwnd allows any output, if so we 8452 * go ahead and fomulate and send the low level chunks. Making sure 8453 * to combine any control in the control chunk queue also. 8454 */ 8455 struct sctp_association *asoc; 8456 struct sctp_nets *net; 8457 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0, 8458 burst_cnt = 0, burst_limit = 0; 8459 struct timeval now; 8460 int now_filled = 0; 8461 int cwnd_full = 0; 8462 int nagle_on = 0; 8463 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 8464 int un_sent = 0; 8465 int fr_done, tot_frs = 0; 8466 8467 asoc = &stcb->asoc; 8468 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) { 8469 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) { 8470 nagle_on = 0; 8471 } else { 8472 nagle_on = 1; 8473 } 8474 } 8475 SCTP_TCB_LOCK_ASSERT(stcb); 8476 8477 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); 8478 8479 if ((un_sent <= 0) && 8480 (TAILQ_EMPTY(&asoc->control_send_queue)) && 8481 (asoc->sent_queue_retran_cnt == 0)) { 8482 /* Nothing to do unless there is something to be sent left */ 8483 return (error); 8484 } 8485 /* 8486 * Do we have something to send, data or control AND a sack timer 8487 * running, if so piggy-back the sack. 8488 */ 8489 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 8490 sctp_send_sack(stcb); 8491 SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 8492 } 8493 while (asoc->sent_queue_retran_cnt) { 8494 /*- 8495 * Ok, it is retransmission time only, we send out only ONE 8496 * packet with a single call off to the retran code. 8497 */ 8498 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) { 8499 /*- 8500 *Special hook for handling cookiess discarded 8501 * by peer that carried data. Send cookie-ack only 8502 * and then the next call with get the retran's. 8503 */ 8504 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 8505 &cwnd_full, from_where, 8506 &now, &now_filled, frag_point); 8507 return (0); 8508 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) { 8509 /* if its not from a HB then do it */ 8510 fr_done = 0; 8511 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done); 8512 if (fr_done) { 8513 tot_frs++; 8514 } 8515 } else { 8516 /* 8517 * its from any other place, we don't allow retran 8518 * output (only control) 8519 */ 8520 ret = 1; 8521 } 8522 if (ret > 0) { 8523 /* Can't send anymore */ 8524 /*- 8525 * now lets push out control by calling med-level 8526 * output once. this assures that we WILL send HB's 8527 * if queued too. 8528 */ 8529 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 8530 &cwnd_full, from_where, 8531 &now, &now_filled, frag_point); 8532 #ifdef SCTP_AUDITING_ENABLED 8533 sctp_auditing(8, inp, stcb, NULL); 8534 #endif 8535 return (sctp_timer_validation(inp, stcb, asoc, ret)); 8536 } 8537 if (ret < 0) { 8538 /*- 8539 * The count was off.. retran is not happening so do 8540 * the normal retransmission. 8541 */ 8542 #ifdef SCTP_AUDITING_ENABLED 8543 sctp_auditing(9, inp, stcb, NULL); 8544 #endif 8545 if (ret == SCTP_RETRAN_EXIT) { 8546 return (-1); 8547 } 8548 break; 8549 } 8550 if (from_where == SCTP_OUTPUT_FROM_T3) { 8551 /* Only one transmission allowed out of a timeout */ 8552 #ifdef SCTP_AUDITING_ENABLED 8553 sctp_auditing(10, inp, stcb, NULL); 8554 #endif 8555 /* Push out any control */ 8556 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, &cwnd_full, from_where, 8557 &now, &now_filled, frag_point); 8558 return (ret); 8559 } 8560 if (tot_frs > asoc->max_burst) { 8561 /* Hit FR burst limit */ 8562 return (0); 8563 } 8564 if ((num_out == 0) && (ret == 0)) { 8565 8566 /* No more retrans to send */ 8567 break; 8568 } 8569 } 8570 #ifdef SCTP_AUDITING_ENABLED 8571 sctp_auditing(12, inp, stcb, NULL); 8572 #endif 8573 /* Check for bad destinations, if they exist move chunks around. */ 8574 burst_limit = asoc->max_burst; 8575 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 8576 if ((net->dest_state & SCTP_ADDR_NOT_REACHABLE) == 8577 SCTP_ADDR_NOT_REACHABLE) { 8578 /*- 8579 * if possible move things off of this address we 8580 * still may send below due to the dormant state but 8581 * we try to find an alternate address to send to 8582 * and if we have one we move all queued data on the 8583 * out wheel to this alternate address. 8584 */ 8585 if (net->ref_count > 1) 8586 sctp_move_to_an_alt(stcb, asoc, net); 8587 } else { 8588 /*- 8589 * if ((asoc->sat_network) || (net->addr_is_local)) 8590 * { burst_limit = asoc->max_burst * 8591 * SCTP_SAT_NETWORK_BURST_INCR; } 8592 */ 8593 if (sctp_use_cwnd_based_maxburst) { 8594 if ((net->flight_size + (burst_limit * net->mtu)) < net->cwnd) { 8595 int old_cwnd; 8596 8597 if (net->ssthresh < net->cwnd) 8598 net->ssthresh = net->cwnd; 8599 old_cwnd = net->cwnd; 8600 net->cwnd = (net->flight_size + (burst_limit * net->mtu)); 8601 8602 #ifdef SCTP_CWND_MONITOR 8603 sctp_log_cwnd(stcb, net, (net->cwnd - old_cwnd), SCTP_CWND_LOG_FROM_BRST); 8604 #endif 8605 8606 #ifdef SCTP_LOG_MAXBURST 8607 sctp_log_maxburst(stcb, net, 0, burst_limit, SCTP_MAX_BURST_APPLIED); 8608 #endif 8609 SCTP_STAT_INCR(sctps_maxburstqueued); 8610 } 8611 net->fast_retran_ip = 0; 8612 } else { 8613 if (net->flight_size == 0) { 8614 /* Should be decaying the cwnd here */ 8615 ; 8616 } 8617 } 8618 } 8619 8620 } 8621 burst_cnt = 0; 8622 cwnd_full = 0; 8623 do { 8624 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out, 8625 &reason_code, 0, &cwnd_full, from_where, 8626 &now, &now_filled, frag_point); 8627 if (error) { 8628 #ifdef SCTP_DEBUG 8629 if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) { 8630 printf("Error %d was returned from med-c-op\n", error); 8631 } 8632 #endif 8633 #ifdef SCTP_LOG_MAXBURST 8634 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP); 8635 #endif 8636 #ifdef SCTP_CWND_LOGGING 8637 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES); 8638 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES); 8639 #endif 8640 8641 break; 8642 } 8643 #ifdef SCTP_DEBUG 8644 if (sctp_debug_on & SCTP_DEBUG_OUTPUT3) { 8645 printf("m-c-o put out %d\n", num_out); 8646 } 8647 #endif 8648 tot_out += num_out; 8649 burst_cnt++; 8650 #ifdef SCTP_CWND_LOGGING 8651 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES); 8652 if (num_out == 0) { 8653 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES); 8654 } 8655 #endif 8656 if (nagle_on) { 8657 /*- 8658 * When nagle is on, we look at how much is un_sent, then 8659 * if its smaller than an MTU and we have data in 8660 * flight we stop. 8661 */ 8662 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 8663 ((stcb->asoc.chunks_on_out_queue - stcb->asoc.total_flight_count) 8664 * sizeof(struct sctp_data_chunk))); 8665 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) && 8666 (stcb->asoc.total_flight > 0)) { 8667 break; 8668 } 8669 } 8670 if (TAILQ_EMPTY(&asoc->control_send_queue) && 8671 TAILQ_EMPTY(&asoc->send_queue) && 8672 TAILQ_EMPTY(&asoc->out_wheel)) { 8673 /* Nothing left to send */ 8674 break; 8675 } 8676 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) { 8677 /* Nothing left to send */ 8678 break; 8679 } 8680 } while (num_out && (sctp_use_cwnd_based_maxburst || 8681 (burst_cnt < burst_limit))); 8682 8683 if (sctp_use_cwnd_based_maxburst == 0) { 8684 if (burst_cnt >= burst_limit) { 8685 SCTP_STAT_INCR(sctps_maxburstqueued); 8686 asoc->burst_limit_applied = 1; 8687 #ifdef SCTP_LOG_MAXBURST 8688 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED); 8689 #endif 8690 } else { 8691 asoc->burst_limit_applied = 0; 8692 } 8693 } 8694 #ifdef SCTP_CWND_LOGGING 8695 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES); 8696 #endif 8697 #ifdef SCTP_DEBUG 8698 if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) { 8699 printf("Ok, we have put out %d chunks\n", tot_out); 8700 } 8701 #endif 8702 /*- 8703 * Now we need to clean up the control chunk chain if a ECNE is on 8704 * it. It must be marked as UNSENT again so next call will continue 8705 * to send it until such time that we get a CWR, to remove it. 8706 */ 8707 if (stcb->asoc.ecn_echo_cnt_onq) 8708 sctp_fix_ecn_echo(asoc); 8709 return (error); 8710 } 8711 8712 8713 int 8714 sctp_output(inp, m, addr, control, p, flags) 8715 struct sctp_inpcb *inp; 8716 struct mbuf *m; 8717 struct sockaddr *addr; 8718 struct mbuf *control; 8719 8720 struct thread *p; 8721 int flags; 8722 { 8723 if (inp == NULL) { 8724 return (EINVAL); 8725 } 8726 if (inp->sctp_socket == NULL) { 8727 return (EINVAL); 8728 } 8729 return (sctp_sosend(inp->sctp_socket, 8730 addr, 8731 (struct uio *)NULL, 8732 m, 8733 control, 8734 flags, 8735 p)); 8736 } 8737 8738 void 8739 send_forward_tsn(struct sctp_tcb *stcb, 8740 struct sctp_association *asoc) 8741 { 8742 struct sctp_tmit_chunk *chk; 8743 struct sctp_forward_tsn_chunk *fwdtsn; 8744 8745 SCTP_TCB_LOCK_ASSERT(stcb); 8746 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 8747 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 8748 /* mark it to unsent */ 8749 chk->sent = SCTP_DATAGRAM_UNSENT; 8750 chk->snd_count = 0; 8751 /* Do we correct its output location? */ 8752 if (chk->whoTo != asoc->primary_destination) { 8753 sctp_free_remote_addr(chk->whoTo); 8754 chk->whoTo = asoc->primary_destination; 8755 atomic_add_int(&chk->whoTo->ref_count, 1); 8756 } 8757 goto sctp_fill_in_rest; 8758 } 8759 } 8760 /* Ok if we reach here we must build one */ 8761 sctp_alloc_a_chunk(stcb, chk); 8762 if (chk == NULL) { 8763 return; 8764 } 8765 chk->copy_by_ref = 0; 8766 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN; 8767 chk->rec.chunk_id.can_take_data = 0; 8768 chk->asoc = asoc; 8769 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 8770 if (chk->data == NULL) { 8771 atomic_subtract_int(&chk->whoTo->ref_count, 1); 8772 sctp_free_a_chunk(stcb, chk); 8773 return; 8774 } 8775 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 8776 chk->sent = SCTP_DATAGRAM_UNSENT; 8777 chk->snd_count = 0; 8778 chk->whoTo = asoc->primary_destination; 8779 atomic_add_int(&chk->whoTo->ref_count, 1); 8780 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next); 8781 asoc->ctrl_queue_cnt++; 8782 sctp_fill_in_rest: 8783 /*- 8784 * Here we go through and fill out the part that deals with 8785 * stream/seq of the ones we skip. 8786 */ 8787 SCTP_BUF_LEN(chk->data) = 0; 8788 { 8789 struct sctp_tmit_chunk *at, *tp1, *last; 8790 struct sctp_strseq *strseq; 8791 unsigned int cnt_of_space, i, ovh; 8792 unsigned int space_needed; 8793 unsigned int cnt_of_skipped = 0; 8794 8795 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) { 8796 if (at->sent != SCTP_FORWARD_TSN_SKIP) { 8797 /* no more to look at */ 8798 break; 8799 } 8800 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 8801 /* We don't report these */ 8802 continue; 8803 } 8804 cnt_of_skipped++; 8805 } 8806 space_needed = (sizeof(struct sctp_forward_tsn_chunk) + 8807 (cnt_of_skipped * sizeof(struct sctp_strseq))); 8808 8809 cnt_of_space = M_TRAILINGSPACE(chk->data); 8810 8811 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 8812 ovh = SCTP_MIN_OVERHEAD; 8813 } else { 8814 ovh = SCTP_MIN_V4_OVERHEAD; 8815 } 8816 if (cnt_of_space > (asoc->smallest_mtu - ovh)) { 8817 /* trim to a mtu size */ 8818 cnt_of_space = asoc->smallest_mtu - ovh; 8819 } 8820 if (cnt_of_space < space_needed) { 8821 /*- 8822 * ok we must trim down the chunk by lowering the 8823 * advance peer ack point. 8824 */ 8825 cnt_of_skipped = (cnt_of_space - 8826 ((sizeof(struct sctp_forward_tsn_chunk)) / 8827 sizeof(struct sctp_strseq))); 8828 /*- 8829 * Go through and find the TSN that will be the one 8830 * we report. 8831 */ 8832 at = TAILQ_FIRST(&asoc->sent_queue); 8833 for (i = 0; i < cnt_of_skipped; i++) { 8834 tp1 = TAILQ_NEXT(at, sctp_next); 8835 at = tp1; 8836 } 8837 last = at; 8838 /*- 8839 * last now points to last one I can report, update 8840 * peer ack point 8841 */ 8842 asoc->advanced_peer_ack_point = last->rec.data.TSN_seq; 8843 space_needed -= (cnt_of_skipped * sizeof(struct sctp_strseq)); 8844 } 8845 chk->send_size = space_needed; 8846 /* Setup the chunk */ 8847 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *); 8848 fwdtsn->ch.chunk_length = htons(chk->send_size); 8849 fwdtsn->ch.chunk_flags = 0; 8850 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN; 8851 fwdtsn->new_cumulative_tsn = htonl(asoc->advanced_peer_ack_point); 8852 chk->send_size = (sizeof(struct sctp_forward_tsn_chunk) + 8853 (cnt_of_skipped * sizeof(struct sctp_strseq))); 8854 SCTP_BUF_LEN(chk->data) = chk->send_size; 8855 fwdtsn++; 8856 /*- 8857 * Move pointer to after the fwdtsn and transfer to the 8858 * strseq pointer. 8859 */ 8860 strseq = (struct sctp_strseq *)fwdtsn; 8861 /*- 8862 * Now populate the strseq list. This is done blindly 8863 * without pulling out duplicate stream info. This is 8864 * inefficent but won't harm the process since the peer will 8865 * look at these in sequence and will thus release anything. 8866 * It could mean we exceed the PMTU and chop off some that 8867 * we could have included.. but this is unlikely (aka 1432/4 8868 * would mean 300+ stream seq's would have to be reported in 8869 * one FWD-TSN. With a bit of work we can later FIX this to 8870 * optimize and pull out duplcates.. but it does add more 8871 * overhead. So for now... not! 8872 */ 8873 at = TAILQ_FIRST(&asoc->sent_queue); 8874 for (i = 0; i < cnt_of_skipped; i++) { 8875 tp1 = TAILQ_NEXT(at, sctp_next); 8876 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 8877 /* We don't report these */ 8878 i--; 8879 at = tp1; 8880 continue; 8881 } 8882 strseq->stream = ntohs(at->rec.data.stream_number); 8883 strseq->sequence = ntohs(at->rec.data.stream_seq); 8884 strseq++; 8885 at = tp1; 8886 } 8887 } 8888 return; 8889 8890 } 8891 8892 void 8893 sctp_send_sack(struct sctp_tcb *stcb) 8894 { 8895 /*- 8896 * Queue up a SACK in the control queue. We must first check to see 8897 * if a SACK is somehow on the control queue. If so, we will take 8898 * and and remove the old one. 8899 */ 8900 struct sctp_association *asoc; 8901 struct sctp_tmit_chunk *chk, *a_chk; 8902 struct sctp_sack_chunk *sack; 8903 struct sctp_gap_ack_block *gap_descriptor; 8904 struct sack_track *selector; 8905 int mergeable = 0; 8906 int offset; 8907 caddr_t limit; 8908 uint32_t *dup; 8909 int limit_reached = 0; 8910 unsigned int i, jstart, siz, j; 8911 unsigned int num_gap_blocks = 0, space; 8912 int num_dups = 0; 8913 int space_req; 8914 8915 8916 a_chk = NULL; 8917 asoc = &stcb->asoc; 8918 SCTP_TCB_LOCK_ASSERT(stcb); 8919 if (asoc->last_data_chunk_from == NULL) { 8920 /* Hmm we never received anything */ 8921 return; 8922 } 8923 sctp_set_rwnd(stcb, asoc); 8924 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 8925 if (chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) { 8926 /* Hmm, found a sack already on queue, remove it */ 8927 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 8928 asoc->ctrl_queue_cnt++; 8929 a_chk = chk; 8930 if (a_chk->data) { 8931 sctp_m_freem(a_chk->data); 8932 a_chk->data = NULL; 8933 } 8934 sctp_free_remote_addr(a_chk->whoTo); 8935 a_chk->whoTo = NULL; 8936 break; 8937 } 8938 } 8939 if (a_chk == NULL) { 8940 sctp_alloc_a_chunk(stcb, a_chk); 8941 if (a_chk == NULL) { 8942 /* No memory so we drop the idea, and set a timer */ 8943 if (stcb->asoc.delayed_ack) { 8944 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 8945 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5); 8946 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 8947 stcb->sctp_ep, stcb, NULL); 8948 } else { 8949 stcb->asoc.send_sack = 1; 8950 } 8951 return; 8952 } 8953 a_chk->copy_by_ref = 0; 8954 /* a_chk->rec.chunk_id.id = SCTP_SELECTIVE_ACK; */ 8955 a_chk->rec.chunk_id.id = SCTP_SELECTIVE_ACK; 8956 a_chk->rec.chunk_id.can_take_data = 1; 8957 } 8958 /* Clear our pkt counts */ 8959 asoc->data_pkts_seen = 0; 8960 8961 a_chk->asoc = asoc; 8962 a_chk->snd_count = 0; 8963 a_chk->send_size = 0; /* fill in later */ 8964 a_chk->sent = SCTP_DATAGRAM_UNSENT; 8965 8966 if ((asoc->numduptsns) || 8967 (asoc->last_data_chunk_from->dest_state & SCTP_ADDR_NOT_REACHABLE) 8968 ) { 8969 /*- 8970 * Ok, we have some duplicates or the destination for the 8971 * sack is unreachable, lets see if we can select an 8972 * alternate than asoc->last_data_chunk_from 8973 */ 8974 if ((!(asoc->last_data_chunk_from->dest_state & 8975 SCTP_ADDR_NOT_REACHABLE)) && 8976 (asoc->used_alt_onsack > asoc->numnets)) { 8977 /* We used an alt last time, don't this time */ 8978 a_chk->whoTo = NULL; 8979 } else { 8980 asoc->used_alt_onsack++; 8981 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0); 8982 } 8983 if (a_chk->whoTo == NULL) { 8984 /* Nope, no alternate */ 8985 a_chk->whoTo = asoc->last_data_chunk_from; 8986 asoc->used_alt_onsack = 0; 8987 } 8988 } else { 8989 /* 8990 * No duplicates so we use the last place we received data 8991 * from. 8992 */ 8993 asoc->used_alt_onsack = 0; 8994 a_chk->whoTo = asoc->last_data_chunk_from; 8995 } 8996 if (a_chk->whoTo) { 8997 atomic_add_int(&a_chk->whoTo->ref_count, 1); 8998 } 8999 if (asoc->highest_tsn_inside_map == asoc->cumulative_tsn) { 9000 /* no gaps */ 9001 space_req = sizeof(struct sctp_sack_chunk); 9002 } else { 9003 /* gaps get a cluster */ 9004 space_req = MCLBYTES; 9005 } 9006 /* Ok now lets formulate a MBUF with our sack */ 9007 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA); 9008 if ((a_chk->data == NULL) || 9009 (a_chk->whoTo == NULL)) { 9010 /* rats, no mbuf memory */ 9011 if (a_chk->data) { 9012 /* was a problem with the destination */ 9013 sctp_m_freem(a_chk->data); 9014 a_chk->data = NULL; 9015 } 9016 if (a_chk->whoTo) 9017 atomic_subtract_int(&a_chk->whoTo->ref_count, 1); 9018 sctp_free_a_chunk(stcb, a_chk); 9019 if (stcb->asoc.delayed_ack) { 9020 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 9021 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6); 9022 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 9023 stcb->sctp_ep, stcb, NULL); 9024 } else { 9025 stcb->asoc.send_sack = 1; 9026 } 9027 return; 9028 } 9029 /* ok, lets go through and fill it in */ 9030 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD); 9031 space = M_TRAILINGSPACE(a_chk->data); 9032 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) { 9033 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD); 9034 } 9035 limit = mtod(a_chk->data, caddr_t); 9036 limit += space; 9037 9038 sack = mtod(a_chk->data, struct sctp_sack_chunk *); 9039 sack->ch.chunk_type = SCTP_SELECTIVE_ACK; 9040 /* 0x01 is used by nonce for ecn */ 9041 if ((sctp_ecn_enable) && 9042 (sctp_ecn_nonce) && 9043 (asoc->peer_supports_ecn_nonce)) 9044 sack->ch.chunk_flags = (asoc->receiver_nonce_sum & SCTP_SACK_NONCE_SUM); 9045 else 9046 sack->ch.chunk_flags = 0; 9047 9048 if (sctp_cmt_on_off && sctp_cmt_use_dac) { 9049 /*- 9050 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been 9051 * received, then set high bit to 1, else 0. Reset 9052 * pkts_rcvd. 9053 */ 9054 sack->ch.chunk_flags |= (asoc->cmt_dac_pkts_rcvd << 6); 9055 asoc->cmt_dac_pkts_rcvd = 0; 9056 } 9057 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); 9058 sack->sack.a_rwnd = htonl(asoc->my_rwnd); 9059 asoc->my_last_reported_rwnd = asoc->my_rwnd; 9060 9061 /* reset the readers interpretation */ 9062 stcb->freed_by_sorcv_sincelast = 0; 9063 9064 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk)); 9065 9066 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 9067 if (asoc->cumulative_tsn < asoc->mapping_array_base_tsn) { 9068 offset = 1; 9069 /*- 9070 * cum-ack behind the mapping array, so we start and use all 9071 * entries. 9072 */ 9073 jstart = 0; 9074 } else { 9075 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; 9076 /*- 9077 * we skip the first one when the cum-ack is at or above the 9078 * mapping array base. 9079 */ 9080 jstart = 1; 9081 } 9082 if (compare_with_wrap(asoc->highest_tsn_inside_map, asoc->cumulative_tsn, MAX_TSN)) { 9083 /* we have a gap .. maybe */ 9084 for (i = 0; i < siz; i++) { 9085 selector = &sack_array[asoc->mapping_array[i]]; 9086 if (mergeable && selector->right_edge) { 9087 /* 9088 * Backup, left and right edges were ok to 9089 * merge. 9090 */ 9091 num_gap_blocks--; 9092 gap_descriptor--; 9093 } 9094 if (selector->num_entries == 0) 9095 mergeable = 0; 9096 else { 9097 for (j = jstart; j < selector->num_entries; j++) { 9098 if (mergeable && selector->right_edge) { 9099 /* 9100 * do a merge by NOT setting 9101 * the left side 9102 */ 9103 mergeable = 0; 9104 } else { 9105 /* 9106 * no merge, set the left 9107 * side 9108 */ 9109 mergeable = 0; 9110 gap_descriptor->start = htons((selector->gaps[j].start + offset)); 9111 } 9112 gap_descriptor->end = htons((selector->gaps[j].end + offset)); 9113 num_gap_blocks++; 9114 gap_descriptor++; 9115 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { 9116 /* no more room */ 9117 limit_reached = 1; 9118 break; 9119 } 9120 } 9121 if (selector->left_edge) { 9122 mergeable = 1; 9123 } 9124 } 9125 if (limit_reached) { 9126 /* Reached the limit stop */ 9127 break; 9128 } 9129 jstart = 0; 9130 offset += 8; 9131 } 9132 if (num_gap_blocks == 0) { 9133 /* reneged all chunks */ 9134 asoc->highest_tsn_inside_map = asoc->cumulative_tsn; 9135 } 9136 } 9137 /* now we must add any dups we are going to report. */ 9138 if ((limit_reached == 0) && (asoc->numduptsns)) { 9139 dup = (uint32_t *) gap_descriptor; 9140 for (i = 0; i < asoc->numduptsns; i++) { 9141 *dup = htonl(asoc->dup_tsns[i]); 9142 dup++; 9143 num_dups++; 9144 if (((caddr_t)dup + sizeof(uint32_t)) > limit) { 9145 /* no more room */ 9146 break; 9147 } 9148 } 9149 asoc->numduptsns = 0; 9150 } 9151 /* 9152 * now that the chunk is prepared queue it to the control chunk 9153 * queue. 9154 */ 9155 a_chk->send_size = (sizeof(struct sctp_sack_chunk) + 9156 (num_gap_blocks * sizeof(struct sctp_gap_ack_block)) + 9157 (num_dups * sizeof(int32_t))); 9158 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; 9159 sack->sack.num_gap_ack_blks = htons(num_gap_blocks); 9160 sack->sack.num_dup_tsns = htons(num_dups); 9161 sack->ch.chunk_length = htons(a_chk->send_size); 9162 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next); 9163 asoc->ctrl_queue_cnt++; 9164 asoc->send_sack = 0; 9165 SCTP_STAT_INCR(sctps_sendsacks); 9166 return; 9167 } 9168 9169 9170 void 9171 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr) 9172 { 9173 struct mbuf *m_abort; 9174 struct mbuf *m_out = NULL, *m_end = NULL; 9175 struct sctp_abort_chunk *abort = NULL; 9176 int sz; 9177 uint32_t auth_offset = 0; 9178 struct sctp_auth_chunk *auth = NULL; 9179 struct sctphdr *shdr; 9180 9181 /*- 9182 * Add an AUTH chunk, if chunk requires it and save the offset into 9183 * the chain for AUTH 9184 */ 9185 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION, 9186 stcb->asoc.peer_auth_chunks)) { 9187 m_out = sctp_add_auth_chunk(m_out, &m_end, &auth, &auth_offset, 9188 stcb, SCTP_ABORT_ASSOCIATION); 9189 } 9190 SCTP_TCB_LOCK_ASSERT(stcb); 9191 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER); 9192 if (m_abort == NULL) { 9193 /* no mbuf's */ 9194 if (m_out) 9195 sctp_m_freem(m_out); 9196 return; 9197 } 9198 /* link in any error */ 9199 SCTP_BUF_NEXT(m_abort) = operr; 9200 sz = 0; 9201 if (operr) { 9202 struct mbuf *n; 9203 9204 n = operr; 9205 while (n) { 9206 sz += SCTP_BUF_LEN(n); 9207 n = SCTP_BUF_NEXT(n); 9208 } 9209 } 9210 SCTP_BUF_LEN(m_abort) = sizeof(*abort); 9211 if (m_out == NULL) { 9212 /* NO Auth chunk prepended, so reserve space in front */ 9213 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD); 9214 m_out = m_abort; 9215 } else { 9216 /* Put AUTH chunk at the front of the chain */ 9217 SCTP_BUF_NEXT(m_end) = m_abort; 9218 } 9219 9220 /* fill in the ABORT chunk */ 9221 abort = mtod(m_abort, struct sctp_abort_chunk *); 9222 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION; 9223 abort->ch.chunk_flags = 0; 9224 abort->ch.chunk_length = htons(sizeof(*abort) + sz); 9225 9226 /* prepend and fill in the SCTP header */ 9227 SCTP_BUF_PREPEND(m_out, sizeof(struct sctphdr), M_DONTWAIT); 9228 if (m_out == NULL) { 9229 /* TSNH: no memory */ 9230 return; 9231 } 9232 shdr = mtod(m_out, struct sctphdr *); 9233 shdr->src_port = stcb->sctp_ep->sctp_lport; 9234 shdr->dest_port = stcb->rport; 9235 shdr->v_tag = htonl(stcb->asoc.peer_vtag); 9236 shdr->checksum = 0; 9237 auth_offset += sizeof(struct sctphdr); 9238 9239 sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, 9240 stcb->asoc.primary_destination, 9241 (struct sockaddr *)&stcb->asoc.primary_destination->ro._l_addr, 9242 m_out, auth_offset, auth, 1, 0, NULL, 0); 9243 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9244 } 9245 9246 int 9247 sctp_send_shutdown_complete(struct sctp_tcb *stcb, 9248 struct sctp_nets *net) 9249 { 9250 /* formulate and SEND a SHUTDOWN-COMPLETE */ 9251 struct mbuf *m_shutdown_comp; 9252 struct sctp_shutdown_complete_msg *comp_cp; 9253 9254 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_complete_msg), 0, M_DONTWAIT, 1, MT_HEADER); 9255 if (m_shutdown_comp == NULL) { 9256 /* no mbuf's */ 9257 return (-1); 9258 } 9259 comp_cp = mtod(m_shutdown_comp, struct sctp_shutdown_complete_msg *); 9260 comp_cp->shut_cmp.ch.chunk_type = SCTP_SHUTDOWN_COMPLETE; 9261 comp_cp->shut_cmp.ch.chunk_flags = 0; 9262 comp_cp->shut_cmp.ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk)); 9263 comp_cp->sh.src_port = stcb->sctp_ep->sctp_lport; 9264 comp_cp->sh.dest_port = stcb->rport; 9265 comp_cp->sh.v_tag = htonl(stcb->asoc.peer_vtag); 9266 comp_cp->sh.checksum = 0; 9267 9268 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_msg); 9269 sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, 9270 (struct sockaddr *)&net->ro._l_addr, 9271 m_shutdown_comp, 0, NULL, 1, 0, NULL, 0); 9272 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9273 return (0); 9274 } 9275 9276 int 9277 sctp_send_shutdown_complete2(struct mbuf *m, int iphlen, struct sctphdr *sh) 9278 { 9279 /* formulate and SEND a SHUTDOWN-COMPLETE */ 9280 struct mbuf *o_pak; 9281 struct mbuf *mout; 9282 struct ip *iph, *iph_out; 9283 struct ip6_hdr *ip6, *ip6_out; 9284 int offset_out, len; 9285 struct sctp_shutdown_complete_msg *comp_cp; 9286 9287 /* Get room for the largest message */ 9288 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_shutdown_complete_msg)); 9289 9290 o_pak = SCTP_GET_HEADER_FOR_OUTPUT(len); 9291 if (o_pak == NULL) { 9292 /* no mbuf's */ 9293 return (-1); 9294 } 9295 mout = SCTP_HEADER_TO_CHAIN(o_pak); 9296 iph = mtod(m, struct ip *); 9297 iph_out = NULL; 9298 ip6_out = NULL; 9299 offset_out = 0; 9300 if (iph->ip_v == IPVERSION) { 9301 SCTP_BUF_LEN(mout) = sizeof(struct ip) + 9302 sizeof(struct sctp_shutdown_complete_msg); 9303 SCTP_BUF_NEXT(mout) = NULL; 9304 iph_out = mtod(mout, struct ip *); 9305 9306 /* Fill in the IP header for the ABORT */ 9307 iph_out->ip_v = IPVERSION; 9308 iph_out->ip_hl = (sizeof(struct ip) / 4); 9309 iph_out->ip_tos = (u_char)0; 9310 iph_out->ip_id = 0; 9311 iph_out->ip_off = 0; 9312 iph_out->ip_ttl = MAXTTL; 9313 iph_out->ip_p = IPPROTO_SCTP; 9314 iph_out->ip_src.s_addr = iph->ip_dst.s_addr; 9315 iph_out->ip_dst.s_addr = iph->ip_src.s_addr; 9316 9317 /* let IP layer calculate this */ 9318 iph_out->ip_sum = 0; 9319 offset_out += sizeof(*iph_out); 9320 comp_cp = (struct sctp_shutdown_complete_msg *)( 9321 (caddr_t)iph_out + offset_out); 9322 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 9323 ip6 = (struct ip6_hdr *)iph; 9324 SCTP_BUF_LEN(mout) = sizeof(struct ip6_hdr) + 9325 sizeof(struct sctp_shutdown_complete_msg); 9326 SCTP_BUF_NEXT(mout) = NULL; 9327 ip6_out = mtod(mout, struct ip6_hdr *); 9328 9329 /* Fill in the IPv6 header for the ABORT */ 9330 ip6_out->ip6_flow = ip6->ip6_flow; 9331 ip6_out->ip6_hlim = ip6_defhlim; 9332 ip6_out->ip6_nxt = IPPROTO_SCTP; 9333 ip6_out->ip6_src = ip6->ip6_dst; 9334 ip6_out->ip6_dst = ip6->ip6_src; 9335 /* 9336 * ?? The old code had both the iph len + payload, I think 9337 * this is wrong and would never have worked 9338 */ 9339 ip6_out->ip6_plen = sizeof(struct sctp_shutdown_complete_msg); 9340 offset_out += sizeof(*ip6_out); 9341 comp_cp = (struct sctp_shutdown_complete_msg *)( 9342 (caddr_t)ip6_out + offset_out); 9343 } else { 9344 /* Currently not supported. */ 9345 return (-1); 9346 } 9347 9348 SCTP_HEADER_LEN(o_pak) = SCTP_BUF_LEN(mout); 9349 /* Now copy in and fill in the ABORT tags etc. */ 9350 comp_cp->sh.src_port = sh->dest_port; 9351 comp_cp->sh.dest_port = sh->src_port; 9352 comp_cp->sh.checksum = 0; 9353 comp_cp->sh.v_tag = sh->v_tag; 9354 comp_cp->shut_cmp.ch.chunk_flags = SCTP_HAD_NO_TCB; 9355 comp_cp->shut_cmp.ch.chunk_type = SCTP_SHUTDOWN_COMPLETE; 9356 comp_cp->shut_cmp.ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk)); 9357 9358 /* add checksum */ 9359 if ((sctp_no_csum_on_loopback) && SCTP_IS_IT_LOOPBACK(o_pak)) { 9360 comp_cp->sh.checksum = 0; 9361 } else { 9362 comp_cp->sh.checksum = sctp_calculate_sum(mout, NULL, offset_out); 9363 } 9364 if (iph_out != NULL) { 9365 sctp_route_t ro; 9366 9367 bzero(&ro, sizeof ro); 9368 /* set IPv4 length */ 9369 iph_out->ip_len = SCTP_HEADER_LEN(o_pak); 9370 /* out it goes */ 9371 ip_output(o_pak, 0, &ro, IP_RAWOUTPUT, NULL 9372 ,NULL 9373 ); 9374 /* Free the route if we got one back */ 9375 if (ro.ro_rt) 9376 RTFREE(ro.ro_rt); 9377 } else if (ip6_out != NULL) { 9378 struct route_in6 ro; 9379 9380 bzero(&ro, sizeof(ro)); 9381 ip6_output(o_pak, NULL, &ro, 0, NULL, NULL 9382 ,NULL 9383 ); 9384 /* Free the route if we got one back */ 9385 if (ro.ro_rt) 9386 RTFREE(ro.ro_rt); 9387 } 9388 SCTP_STAT_INCR(sctps_sendpackets); 9389 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 9390 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9391 return (0); 9392 } 9393 9394 static struct sctp_nets * 9395 sctp_select_hb_destination(struct sctp_tcb *stcb, struct timeval *now) 9396 { 9397 struct sctp_nets *net, *hnet; 9398 int ms_goneby, highest_ms, state_overide = 0; 9399 9400 SCTP_GETTIME_TIMEVAL(now); 9401 highest_ms = 0; 9402 hnet = NULL; 9403 SCTP_TCB_LOCK_ASSERT(stcb); 9404 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 9405 if ( 9406 ((net->dest_state & SCTP_ADDR_NOHB) && ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) || 9407 (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE) 9408 ) { 9409 /* 9410 * Skip this guy from consideration if HB is off AND 9411 * its confirmed 9412 */ 9413 continue; 9414 } 9415 if (sctp_destination_is_reachable(stcb, (struct sockaddr *)&net->ro._l_addr) == 0) { 9416 /* skip this dest net from consideration */ 9417 continue; 9418 } 9419 if (net->last_sent_time.tv_sec) { 9420 /* Sent to so we subtract */ 9421 ms_goneby = (now->tv_sec - net->last_sent_time.tv_sec) * 1000; 9422 } else 9423 /* Never been sent to */ 9424 ms_goneby = 0x7fffffff; 9425 /*- 9426 * When the address state is unconfirmed but still 9427 * considered reachable, we HB at a higher rate. Once it 9428 * goes confirmed OR reaches the "unreachable" state, thenw 9429 * we cut it back to HB at a more normal pace. 9430 */ 9431 if ((net->dest_state & (SCTP_ADDR_UNCONFIRMED | SCTP_ADDR_NOT_REACHABLE)) == SCTP_ADDR_UNCONFIRMED) { 9432 state_overide = 1; 9433 } else { 9434 state_overide = 0; 9435 } 9436 9437 if ((((unsigned int)ms_goneby >= net->RTO) || (state_overide)) && 9438 (ms_goneby > highest_ms)) { 9439 highest_ms = ms_goneby; 9440 hnet = net; 9441 } 9442 } 9443 if (hnet && 9444 ((hnet->dest_state & (SCTP_ADDR_UNCONFIRMED | SCTP_ADDR_NOT_REACHABLE)) == SCTP_ADDR_UNCONFIRMED)) { 9445 state_overide = 1; 9446 } else { 9447 state_overide = 0; 9448 } 9449 9450 if (highest_ms && (((unsigned int)highest_ms >= hnet->RTO) || state_overide)) { 9451 /*- 9452 * Found the one with longest delay bounds OR it is 9453 * unconfirmed and still not marked unreachable. 9454 */ 9455 #ifdef SCTP_DEBUG 9456 if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) { 9457 printf("net:%p is the hb winner -", 9458 hnet); 9459 if (hnet) 9460 sctp_print_address((struct sockaddr *)&hnet->ro._l_addr); 9461 else 9462 printf(" none\n"); 9463 } 9464 #endif 9465 /* update the timer now */ 9466 hnet->last_sent_time = *now; 9467 return (hnet); 9468 } 9469 /* Nothing to HB */ 9470 return (NULL); 9471 } 9472 9473 int 9474 sctp_send_hb(struct sctp_tcb *stcb, int user_req, struct sctp_nets *u_net) 9475 { 9476 struct sctp_tmit_chunk *chk; 9477 struct sctp_nets *net; 9478 struct sctp_heartbeat_chunk *hb; 9479 struct timeval now; 9480 struct sockaddr_in *sin; 9481 struct sockaddr_in6 *sin6; 9482 9483 SCTP_TCB_LOCK_ASSERT(stcb); 9484 if (user_req == 0) { 9485 net = sctp_select_hb_destination(stcb, &now); 9486 if (net == NULL) { 9487 /*- 9488 * All our busy none to send to, just start the 9489 * timer again. 9490 */ 9491 if (stcb->asoc.state == 0) { 9492 return (0); 9493 } 9494 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, 9495 stcb->sctp_ep, 9496 stcb, 9497 net); 9498 return (0); 9499 } 9500 } else { 9501 net = u_net; 9502 if (net == NULL) { 9503 return (0); 9504 } 9505 SCTP_GETTIME_TIMEVAL(&now); 9506 } 9507 sin = (struct sockaddr_in *)&net->ro._l_addr; 9508 if (sin->sin_family != AF_INET) { 9509 if (sin->sin_family != AF_INET6) { 9510 /* huh */ 9511 return (0); 9512 } 9513 } 9514 sctp_alloc_a_chunk(stcb, chk); 9515 if (chk == NULL) { 9516 #ifdef SCTP_DEBUG 9517 if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) { 9518 printf("Gak, can't get a chunk for hb\n"); 9519 } 9520 #endif 9521 return (0); 9522 } 9523 chk->copy_by_ref = 0; 9524 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST; 9525 chk->rec.chunk_id.can_take_data = 1; 9526 chk->asoc = &stcb->asoc; 9527 chk->send_size = sizeof(struct sctp_heartbeat_chunk); 9528 9529 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER); 9530 if (chk->data == NULL) { 9531 sctp_free_a_chunk(stcb, chk); 9532 return (0); 9533 } 9534 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 9535 SCTP_BUF_LEN(chk->data) = chk->send_size; 9536 chk->sent = SCTP_DATAGRAM_UNSENT; 9537 chk->snd_count = 0; 9538 chk->whoTo = net; 9539 atomic_add_int(&chk->whoTo->ref_count, 1); 9540 /* Now we have a mbuf that we can fill in with the details */ 9541 hb = mtod(chk->data, struct sctp_heartbeat_chunk *); 9542 9543 /* fill out chunk header */ 9544 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST; 9545 hb->ch.chunk_flags = 0; 9546 hb->ch.chunk_length = htons(chk->send_size); 9547 /* Fill out hb parameter */ 9548 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO); 9549 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param)); 9550 hb->heartbeat.hb_info.time_value_1 = now.tv_sec; 9551 hb->heartbeat.hb_info.time_value_2 = now.tv_usec; 9552 /* Did our user request this one, put it in */ 9553 hb->heartbeat.hb_info.user_req = user_req; 9554 hb->heartbeat.hb_info.addr_family = sin->sin_family; 9555 hb->heartbeat.hb_info.addr_len = sin->sin_len; 9556 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 9557 /* 9558 * we only take from the entropy pool if the address is not 9559 * confirmed. 9560 */ 9561 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 9562 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 9563 } else { 9564 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0; 9565 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0; 9566 } 9567 if (sin->sin_family == AF_INET) { 9568 memcpy(hb->heartbeat.hb_info.address, &sin->sin_addr, sizeof(sin->sin_addr)); 9569 } else if (sin->sin_family == AF_INET6) { 9570 /* We leave the scope the way it is in our lookup table. */ 9571 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 9572 memcpy(hb->heartbeat.hb_info.address, &sin6->sin6_addr, sizeof(sin6->sin6_addr)); 9573 } else { 9574 /* huh compiler bug */ 9575 return (0); 9576 } 9577 /* ok we have a destination that needs a beat */ 9578 /* lets do the theshold management Qiaobing style */ 9579 9580 if (sctp_threshold_management(stcb->sctp_ep, stcb, net, 9581 stcb->asoc.max_send_times)) { 9582 /*- 9583 * we have lost the association, in a way this is 9584 * quite bad since we really are one less time since 9585 * we really did not send yet. This is the down side 9586 * to the Q's style as defined in the RFC and not my 9587 * alternate style defined in the RFC. 9588 */ 9589 atomic_subtract_int(&chk->whoTo->ref_count, 1); 9590 if (chk->data != NULL) { 9591 sctp_m_freem(chk->data); 9592 chk->data = NULL; 9593 } 9594 sctp_free_a_chunk(stcb, chk); 9595 return (-1); 9596 } 9597 net->hb_responded = 0; 9598 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 9599 stcb->asoc.ctrl_queue_cnt++; 9600 SCTP_STAT_INCR(sctps_sendheartbeat); 9601 /*- 9602 * Call directly med level routine to put out the chunk. It will 9603 * always tumble out control chunks aka HB but it may even tumble 9604 * out data too. 9605 */ 9606 return (1); 9607 } 9608 9609 void 9610 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net, 9611 uint32_t high_tsn) 9612 { 9613 struct sctp_association *asoc; 9614 struct sctp_ecne_chunk *ecne; 9615 struct sctp_tmit_chunk *chk; 9616 9617 asoc = &stcb->asoc; 9618 SCTP_TCB_LOCK_ASSERT(stcb); 9619 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 9620 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 9621 /* found a previous ECN_ECHO update it if needed */ 9622 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 9623 ecne->tsn = htonl(high_tsn); 9624 return; 9625 } 9626 } 9627 /* nope could not find one to update so we must build one */ 9628 sctp_alloc_a_chunk(stcb, chk); 9629 if (chk == NULL) { 9630 return; 9631 } 9632 chk->copy_by_ref = 0; 9633 SCTP_STAT_INCR(sctps_sendecne); 9634 chk->rec.chunk_id.id = SCTP_ECN_ECHO; 9635 chk->rec.chunk_id.can_take_data = 0; 9636 chk->asoc = &stcb->asoc; 9637 chk->send_size = sizeof(struct sctp_ecne_chunk); 9638 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER); 9639 if (chk->data == NULL) { 9640 sctp_free_a_chunk(stcb, chk); 9641 return; 9642 } 9643 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 9644 SCTP_BUF_LEN(chk->data) = chk->send_size; 9645 chk->sent = SCTP_DATAGRAM_UNSENT; 9646 chk->snd_count = 0; 9647 chk->whoTo = net; 9648 atomic_add_int(&chk->whoTo->ref_count, 1); 9649 stcb->asoc.ecn_echo_cnt_onq++; 9650 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 9651 ecne->ch.chunk_type = SCTP_ECN_ECHO; 9652 ecne->ch.chunk_flags = 0; 9653 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk)); 9654 ecne->tsn = htonl(high_tsn); 9655 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 9656 asoc->ctrl_queue_cnt++; 9657 } 9658 9659 void 9660 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net, 9661 struct mbuf *m, int iphlen, int bad_crc) 9662 { 9663 struct sctp_association *asoc; 9664 struct sctp_pktdrop_chunk *drp; 9665 struct sctp_tmit_chunk *chk; 9666 uint8_t *datap; 9667 int len; 9668 unsigned int small_one; 9669 struct ip *iph; 9670 9671 long spc; 9672 9673 asoc = &stcb->asoc; 9674 SCTP_TCB_LOCK_ASSERT(stcb); 9675 if (asoc->peer_supports_pktdrop == 0) { 9676 /*- 9677 * peer must declare support before I send one. 9678 */ 9679 return; 9680 } 9681 if (stcb->sctp_socket == NULL) { 9682 return; 9683 } 9684 sctp_alloc_a_chunk(stcb, chk); 9685 if (chk == NULL) { 9686 return; 9687 } 9688 chk->copy_by_ref = 0; 9689 iph = mtod(m, struct ip *); 9690 if (iph == NULL) { 9691 return; 9692 } 9693 if (iph->ip_v == IPVERSION) { 9694 /* IPv4 */ 9695 len = chk->send_size = iph->ip_len; 9696 } else { 9697 struct ip6_hdr *ip6h; 9698 9699 /* IPv6 */ 9700 ip6h = mtod(m, struct ip6_hdr *); 9701 len = chk->send_size = htons(ip6h->ip6_plen); 9702 } 9703 chk->asoc = &stcb->asoc; 9704 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 9705 if (chk->data == NULL) { 9706 jump_out: 9707 sctp_free_a_chunk(stcb, chk); 9708 return; 9709 } 9710 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 9711 drp = mtod(chk->data, struct sctp_pktdrop_chunk *); 9712 if (drp == NULL) { 9713 sctp_m_freem(chk->data); 9714 chk->data = NULL; 9715 goto jump_out; 9716 } 9717 small_one = asoc->smallest_mtu; 9718 if (small_one > MCLBYTES) { 9719 /* Only one cluster worth of data MAX */ 9720 small_one = MCLBYTES; 9721 } 9722 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) + 9723 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD)); 9724 chk->book_size_scale = 0; 9725 if (chk->book_size > small_one) { 9726 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED; 9727 drp->trunc_len = htons(chk->send_size); 9728 chk->send_size = small_one - (SCTP_MED_OVERHEAD + 9729 sizeof(struct sctp_pktdrop_chunk) + 9730 sizeof(struct sctphdr)); 9731 len = chk->send_size; 9732 } else { 9733 /* no truncation needed */ 9734 drp->ch.chunk_flags = 0; 9735 drp->trunc_len = htons(0); 9736 } 9737 if (bad_crc) { 9738 drp->ch.chunk_flags |= SCTP_BADCRC; 9739 } 9740 chk->send_size += sizeof(struct sctp_pktdrop_chunk); 9741 SCTP_BUF_LEN(chk->data) = chk->send_size; 9742 chk->sent = SCTP_DATAGRAM_UNSENT; 9743 chk->snd_count = 0; 9744 if (net) { 9745 /* we should hit here */ 9746 chk->whoTo = net; 9747 } else { 9748 chk->whoTo = asoc->primary_destination; 9749 } 9750 atomic_add_int(&chk->whoTo->ref_count, 1); 9751 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED; 9752 chk->rec.chunk_id.can_take_data = 1; 9753 drp->ch.chunk_type = SCTP_PACKET_DROPPED; 9754 drp->ch.chunk_length = htons(chk->send_size); 9755 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket); 9756 if (spc < 0) { 9757 spc = 0; 9758 } 9759 drp->bottle_bw = htonl(spc); 9760 if (asoc->my_rwnd) { 9761 drp->current_onq = htonl(asoc->size_on_reasm_queue + 9762 asoc->size_on_all_streams + 9763 asoc->my_rwnd_control_len + 9764 stcb->sctp_socket->so_rcv.sb_cc); 9765 } else { 9766 /*- 9767 * If my rwnd is 0, possibly from mbuf depletion as well as 9768 * space used, tell the peer there is NO space aka onq == bw 9769 */ 9770 drp->current_onq = htonl(spc); 9771 } 9772 drp->reserved = 0; 9773 datap = drp->data; 9774 m_copydata(m, iphlen, len, (caddr_t)datap); 9775 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 9776 asoc->ctrl_queue_cnt++; 9777 } 9778 9779 void 9780 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn) 9781 { 9782 struct sctp_association *asoc; 9783 struct sctp_cwr_chunk *cwr; 9784 struct sctp_tmit_chunk *chk; 9785 9786 asoc = &stcb->asoc; 9787 SCTP_TCB_LOCK_ASSERT(stcb); 9788 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 9789 if (chk->rec.chunk_id.id == SCTP_ECN_CWR) { 9790 /* found a previous ECN_CWR update it if needed */ 9791 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 9792 if (compare_with_wrap(high_tsn, ntohl(cwr->tsn), 9793 MAX_TSN)) { 9794 cwr->tsn = htonl(high_tsn); 9795 } 9796 return; 9797 } 9798 } 9799 /* nope could not find one to update so we must build one */ 9800 sctp_alloc_a_chunk(stcb, chk); 9801 if (chk == NULL) { 9802 return; 9803 } 9804 chk->copy_by_ref = 0; 9805 chk->rec.chunk_id.id = SCTP_ECN_CWR; 9806 chk->rec.chunk_id.can_take_data = 1; 9807 chk->asoc = &stcb->asoc; 9808 chk->send_size = sizeof(struct sctp_cwr_chunk); 9809 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER); 9810 if (chk->data == NULL) { 9811 sctp_free_a_chunk(stcb, chk); 9812 return; 9813 } 9814 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 9815 SCTP_BUF_LEN(chk->data) = chk->send_size; 9816 chk->sent = SCTP_DATAGRAM_UNSENT; 9817 chk->snd_count = 0; 9818 chk->whoTo = net; 9819 atomic_add_int(&chk->whoTo->ref_count, 1); 9820 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 9821 cwr->ch.chunk_type = SCTP_ECN_CWR; 9822 cwr->ch.chunk_flags = 0; 9823 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk)); 9824 cwr->tsn = htonl(high_tsn); 9825 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 9826 asoc->ctrl_queue_cnt++; 9827 } 9828 9829 void 9830 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk, 9831 int number_entries, uint16_t * list, 9832 uint32_t seq, uint32_t resp_seq, uint32_t last_sent) 9833 { 9834 int len, old_len, i; 9835 struct sctp_stream_reset_out_request *req_out; 9836 struct sctp_chunkhdr *ch; 9837 9838 ch = mtod(chk->data, struct sctp_chunkhdr *); 9839 9840 9841 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 9842 9843 /* get to new offset for the param. */ 9844 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len); 9845 /* now how long will this param be? */ 9846 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries)); 9847 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST); 9848 req_out->ph.param_length = htons(len); 9849 req_out->request_seq = htonl(seq); 9850 req_out->response_seq = htonl(resp_seq); 9851 req_out->send_reset_at_tsn = htonl(last_sent); 9852 if (number_entries) { 9853 for (i = 0; i < number_entries; i++) { 9854 req_out->list_of_streams[i] = htons(list[i]); 9855 } 9856 } 9857 if (SCTP_SIZE32(len) > len) { 9858 /*- 9859 * Need to worry about the pad we may end up adding to the 9860 * end. This is easy since the struct is either aligned to 4 9861 * bytes or 2 bytes off. 9862 */ 9863 req_out->list_of_streams[number_entries] = 0; 9864 } 9865 /* now fix the chunk length */ 9866 ch->chunk_length = htons(len + old_len); 9867 chk->book_size = len + old_len; 9868 chk->book_size_scale = 0; 9869 chk->send_size = SCTP_SIZE32(chk->book_size); 9870 SCTP_BUF_LEN(chk->data) = chk->send_size; 9871 return; 9872 } 9873 9874 9875 void 9876 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk, 9877 int number_entries, uint16_t * list, 9878 uint32_t seq) 9879 { 9880 int len, old_len, i; 9881 struct sctp_stream_reset_in_request *req_in; 9882 struct sctp_chunkhdr *ch; 9883 9884 ch = mtod(chk->data, struct sctp_chunkhdr *); 9885 9886 9887 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 9888 9889 /* get to new offset for the param. */ 9890 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len); 9891 /* now how long will this param be? */ 9892 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries)); 9893 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST); 9894 req_in->ph.param_length = htons(len); 9895 req_in->request_seq = htonl(seq); 9896 if (number_entries) { 9897 for (i = 0; i < number_entries; i++) { 9898 req_in->list_of_streams[i] = htons(list[i]); 9899 } 9900 } 9901 if (SCTP_SIZE32(len) > len) { 9902 /*- 9903 * Need to worry about the pad we may end up adding to the 9904 * end. This is easy since the struct is either aligned to 4 9905 * bytes or 2 bytes off. 9906 */ 9907 req_in->list_of_streams[number_entries] = 0; 9908 } 9909 /* now fix the chunk length */ 9910 ch->chunk_length = htons(len + old_len); 9911 chk->book_size = len + old_len; 9912 chk->book_size_scale = 0; 9913 chk->send_size = SCTP_SIZE32(chk->book_size); 9914 SCTP_BUF_LEN(chk->data) = chk->send_size; 9915 return; 9916 } 9917 9918 9919 void 9920 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk, 9921 uint32_t seq) 9922 { 9923 int len, old_len; 9924 struct sctp_stream_reset_tsn_request *req_tsn; 9925 struct sctp_chunkhdr *ch; 9926 9927 ch = mtod(chk->data, struct sctp_chunkhdr *); 9928 9929 9930 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 9931 9932 /* get to new offset for the param. */ 9933 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len); 9934 /* now how long will this param be? */ 9935 len = sizeof(struct sctp_stream_reset_tsn_request); 9936 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST); 9937 req_tsn->ph.param_length = htons(len); 9938 req_tsn->request_seq = htonl(seq); 9939 9940 /* now fix the chunk length */ 9941 ch->chunk_length = htons(len + old_len); 9942 chk->send_size = len + old_len; 9943 chk->book_size = SCTP_SIZE32(chk->send_size); 9944 chk->book_size_scale = 0; 9945 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 9946 return; 9947 } 9948 9949 void 9950 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk, 9951 uint32_t resp_seq, uint32_t result) 9952 { 9953 int len, old_len; 9954 struct sctp_stream_reset_response *resp; 9955 struct sctp_chunkhdr *ch; 9956 9957 ch = mtod(chk->data, struct sctp_chunkhdr *); 9958 9959 9960 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 9961 9962 /* get to new offset for the param. */ 9963 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len); 9964 /* now how long will this param be? */ 9965 len = sizeof(struct sctp_stream_reset_response); 9966 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 9967 resp->ph.param_length = htons(len); 9968 resp->response_seq = htonl(resp_seq); 9969 resp->result = ntohl(result); 9970 9971 /* now fix the chunk length */ 9972 ch->chunk_length = htons(len + old_len); 9973 chk->book_size = len + old_len; 9974 chk->book_size_scale = 0; 9975 chk->send_size = SCTP_SIZE32(chk->book_size); 9976 SCTP_BUF_LEN(chk->data) = chk->send_size; 9977 return; 9978 9979 } 9980 9981 9982 void 9983 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk, 9984 uint32_t resp_seq, uint32_t result, 9985 uint32_t send_una, uint32_t recv_next) 9986 { 9987 int len, old_len; 9988 struct sctp_stream_reset_response_tsn *resp; 9989 struct sctp_chunkhdr *ch; 9990 9991 ch = mtod(chk->data, struct sctp_chunkhdr *); 9992 9993 9994 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 9995 9996 /* get to new offset for the param. */ 9997 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len); 9998 /* now how long will this param be? */ 9999 len = sizeof(struct sctp_stream_reset_response_tsn); 10000 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 10001 resp->ph.param_length = htons(len); 10002 resp->response_seq = htonl(resp_seq); 10003 resp->result = htonl(result); 10004 resp->senders_next_tsn = htonl(send_una); 10005 resp->receivers_next_tsn = htonl(recv_next); 10006 10007 /* now fix the chunk length */ 10008 ch->chunk_length = htons(len + old_len); 10009 chk->book_size = len + old_len; 10010 chk->send_size = SCTP_SIZE32(chk->book_size); 10011 chk->book_size_scale = 0; 10012 SCTP_BUF_LEN(chk->data) = chk->send_size; 10013 return; 10014 } 10015 10016 10017 int 10018 sctp_send_str_reset_req(struct sctp_tcb *stcb, 10019 int number_entries, uint16_t * list, 10020 uint8_t send_out_req, uint32_t resp_seq, 10021 uint8_t send_in_req, 10022 uint8_t send_tsn_req) 10023 { 10024 10025 struct sctp_association *asoc; 10026 struct sctp_tmit_chunk *chk; 10027 struct sctp_chunkhdr *ch; 10028 uint32_t seq; 10029 10030 asoc = &stcb->asoc; 10031 if (asoc->stream_reset_outstanding) { 10032 /*- 10033 * Already one pending, must get ACK back to clear the flag. 10034 */ 10035 return (EBUSY); 10036 } 10037 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0)) { 10038 /* nothing to do */ 10039 return (EINVAL); 10040 } 10041 if (send_tsn_req && (send_out_req || send_in_req)) { 10042 /* error, can't do that */ 10043 return (EINVAL); 10044 } 10045 sctp_alloc_a_chunk(stcb, chk); 10046 if (chk == NULL) { 10047 return (ENOMEM); 10048 } 10049 chk->copy_by_ref = 0; 10050 chk->rec.chunk_id.id = SCTP_STREAM_RESET; 10051 chk->rec.chunk_id.can_take_data = 0; 10052 chk->asoc = &stcb->asoc; 10053 chk->book_size = sizeof(struct sctp_chunkhdr); 10054 chk->send_size = SCTP_SIZE32(chk->book_size); 10055 chk->book_size_scale = 0; 10056 10057 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 10058 if (chk->data == NULL) { 10059 sctp_free_a_chunk(stcb, chk); 10060 return (ENOMEM); 10061 } 10062 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 10063 10064 /* setup chunk parameters */ 10065 chk->sent = SCTP_DATAGRAM_UNSENT; 10066 chk->snd_count = 0; 10067 chk->whoTo = asoc->primary_destination; 10068 atomic_add_int(&chk->whoTo->ref_count, 1); 10069 10070 ch = mtod(chk->data, struct sctp_chunkhdr *); 10071 ch->chunk_type = SCTP_STREAM_RESET; 10072 ch->chunk_flags = 0; 10073 ch->chunk_length = htons(chk->book_size); 10074 SCTP_BUF_LEN(chk->data) = chk->send_size; 10075 10076 seq = stcb->asoc.str_reset_seq_out; 10077 if (send_out_req) { 10078 sctp_add_stream_reset_out(chk, number_entries, list, 10079 seq, resp_seq, (stcb->asoc.sending_seq - 1)); 10080 asoc->stream_reset_out_is_outstanding = 1; 10081 seq++; 10082 asoc->stream_reset_outstanding++; 10083 } 10084 if (send_in_req) { 10085 sctp_add_stream_reset_in(chk, number_entries, list, seq); 10086 asoc->stream_reset_outstanding++; 10087 } 10088 if (send_tsn_req) { 10089 sctp_add_stream_reset_tsn(chk, seq); 10090 asoc->stream_reset_outstanding++; 10091 } 10092 asoc->str_reset = chk; 10093 10094 /* insert the chunk for sending */ 10095 TAILQ_INSERT_TAIL(&asoc->control_send_queue, 10096 chk, 10097 sctp_next); 10098 asoc->ctrl_queue_cnt++; 10099 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 10100 return (0); 10101 } 10102 10103 void 10104 sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag, 10105 struct mbuf *err_cause) 10106 { 10107 /*- 10108 * Formulate the abort message, and send it back down. 10109 */ 10110 struct mbuf *o_pak; 10111 struct mbuf *mout; 10112 struct sctp_abort_msg *abm; 10113 struct ip *iph, *iph_out; 10114 struct ip6_hdr *ip6, *ip6_out; 10115 int iphlen_out; 10116 10117 /* don't respond to ABORT with ABORT */ 10118 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) { 10119 if (err_cause) 10120 sctp_m_freem(err_cause); 10121 return; 10122 } 10123 o_pak = SCTP_GET_HEADER_FOR_OUTPUT((sizeof(struct ip6_hdr) + sizeof(struct sctp_abort_msg))); 10124 if (o_pak == NULL) { 10125 if (err_cause) 10126 sctp_m_freem(err_cause); 10127 return; 10128 } 10129 mout = SCTP_HEADER_TO_CHAIN(o_pak); 10130 iph = mtod(m, struct ip *); 10131 iph_out = NULL; 10132 ip6_out = NULL; 10133 if (iph->ip_v == IPVERSION) { 10134 iph_out = mtod(mout, struct ip *); 10135 SCTP_BUF_LEN(mout) = sizeof(*iph_out) + sizeof(*abm); 10136 SCTP_BUF_NEXT(mout) = err_cause; 10137 10138 /* Fill in the IP header for the ABORT */ 10139 iph_out->ip_v = IPVERSION; 10140 iph_out->ip_hl = (sizeof(struct ip) / 4); 10141 iph_out->ip_tos = (u_char)0; 10142 iph_out->ip_id = 0; 10143 iph_out->ip_off = 0; 10144 iph_out->ip_ttl = MAXTTL; 10145 iph_out->ip_p = IPPROTO_SCTP; 10146 iph_out->ip_src.s_addr = iph->ip_dst.s_addr; 10147 iph_out->ip_dst.s_addr = iph->ip_src.s_addr; 10148 /* let IP layer calculate this */ 10149 iph_out->ip_sum = 0; 10150 10151 iphlen_out = sizeof(*iph_out); 10152 abm = (struct sctp_abort_msg *)((caddr_t)iph_out + iphlen_out); 10153 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 10154 ip6 = (struct ip6_hdr *)iph; 10155 ip6_out = mtod(mout, struct ip6_hdr *); 10156 SCTP_BUF_LEN(mout) = sizeof(*ip6_out) + sizeof(*abm); 10157 SCTP_BUF_NEXT(mout) = err_cause; 10158 10159 /* Fill in the IP6 header for the ABORT */ 10160 ip6_out->ip6_flow = ip6->ip6_flow; 10161 ip6_out->ip6_hlim = ip6_defhlim; 10162 ip6_out->ip6_nxt = IPPROTO_SCTP; 10163 ip6_out->ip6_src = ip6->ip6_dst; 10164 ip6_out->ip6_dst = ip6->ip6_src; 10165 10166 iphlen_out = sizeof(*ip6_out); 10167 abm = (struct sctp_abort_msg *)((caddr_t)ip6_out + iphlen_out); 10168 } else { 10169 /* Currently not supported */ 10170 return; 10171 } 10172 10173 abm->sh.src_port = sh->dest_port; 10174 abm->sh.dest_port = sh->src_port; 10175 abm->sh.checksum = 0; 10176 if (vtag == 0) { 10177 abm->sh.v_tag = sh->v_tag; 10178 abm->msg.ch.chunk_flags = SCTP_HAD_NO_TCB; 10179 } else { 10180 abm->sh.v_tag = htonl(vtag); 10181 abm->msg.ch.chunk_flags = 0; 10182 } 10183 abm->msg.ch.chunk_type = SCTP_ABORT_ASSOCIATION; 10184 10185 if (err_cause) { 10186 struct mbuf *m_tmp = err_cause; 10187 int err_len = 0; 10188 10189 /* get length of the err_cause chain */ 10190 while (m_tmp != NULL) { 10191 err_len += SCTP_BUF_LEN(m_tmp); 10192 m_tmp = SCTP_BUF_NEXT(m_tmp); 10193 } 10194 SCTP_HEADER_LEN(o_pak) = SCTP_BUF_LEN(mout) + err_len; 10195 if (err_len % 4) { 10196 /* need pad at end of chunk */ 10197 uint32_t cpthis = 0; 10198 int padlen; 10199 10200 padlen = 4 - (SCTP_HEADER_LEN(o_pak) % 4); 10201 m_copyback(mout, SCTP_HEADER_LEN(o_pak), padlen, (caddr_t)&cpthis); 10202 SCTP_HEADER_LEN(o_pak) += padlen; 10203 } 10204 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch) + err_len); 10205 } else { 10206 SCTP_HEADER_LEN(mout) = SCTP_BUF_LEN(mout); 10207 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch)); 10208 } 10209 10210 /* add checksum */ 10211 if ((sctp_no_csum_on_loopback) && SCTP_IS_IT_LOOPBACK(m)) { 10212 abm->sh.checksum = 0; 10213 } else { 10214 abm->sh.checksum = sctp_calculate_sum(mout, NULL, iphlen_out); 10215 } 10216 if (iph_out != NULL) { 10217 sctp_route_t ro; 10218 10219 /* zap the stack pointer to the route */ 10220 bzero(&ro, sizeof ro); 10221 #ifdef SCTP_DEBUG 10222 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 10223 printf("sctp_send_abort calling ip_output:\n"); 10224 sctp_print_address_pkt(iph_out, &abm->sh); 10225 } 10226 #endif 10227 /* set IPv4 length */ 10228 iph_out->ip_len = SCTP_HEADER_LEN(o_pak); 10229 /* out it goes */ 10230 (void)ip_output(o_pak, 0, &ro, IP_RAWOUTPUT, NULL 10231 ,NULL 10232 ); 10233 /* Free the route if we got one back */ 10234 if (ro.ro_rt) 10235 RTFREE(ro.ro_rt); 10236 } else if (ip6_out != NULL) { 10237 struct route_in6 ro; 10238 10239 /* zap the stack pointer to the route */ 10240 bzero(&ro, sizeof(ro)); 10241 #ifdef SCTP_DEBUG 10242 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 10243 printf("sctp_send_abort calling ip6_output:\n"); 10244 sctp_print_address_pkt((struct ip *)ip6_out, &abm->sh); 10245 } 10246 #endif 10247 ip6_out->ip6_plen = SCTP_HEADER_LEN(o_pak) - sizeof(*ip6_out); 10248 ip6_output(o_pak, NULL, &ro, 0, NULL, NULL 10249 ,NULL 10250 ); 10251 /* Free the route if we got one back */ 10252 if (ro.ro_rt) 10253 RTFREE(ro.ro_rt); 10254 } 10255 SCTP_STAT_INCR(sctps_sendpackets); 10256 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 10257 } 10258 10259 void 10260 sctp_send_operr_to(struct mbuf *m, int iphlen, 10261 struct mbuf *scm, 10262 uint32_t vtag) 10263 { 10264 struct mbuf *o_pak; 10265 struct sctphdr *ihdr; 10266 int retcode; 10267 struct sctphdr *ohdr; 10268 struct sctp_chunkhdr *ophdr; 10269 10270 struct ip *iph; 10271 10272 #ifdef SCTP_DEBUG 10273 struct sockaddr_in6 lsa6, fsa6; 10274 10275 #endif 10276 uint32_t val; 10277 struct mbuf *at; 10278 int len; 10279 10280 iph = mtod(m, struct ip *); 10281 ihdr = (struct sctphdr *)((caddr_t)iph + iphlen); 10282 10283 SCTP_BUF_PREPEND(scm, (sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)), M_DONTWAIT); 10284 if (scm == NULL) { 10285 /* can't send because we can't add a mbuf */ 10286 return; 10287 } 10288 ohdr = mtod(scm, struct sctphdr *); 10289 ohdr->src_port = ihdr->dest_port; 10290 ohdr->dest_port = ihdr->src_port; 10291 ohdr->v_tag = vtag; 10292 ohdr->checksum = 0; 10293 ophdr = (struct sctp_chunkhdr *)(ohdr + 1); 10294 ophdr->chunk_type = SCTP_OPERATION_ERROR; 10295 ophdr->chunk_flags = 0; 10296 len = 0; 10297 at = scm; 10298 while (at) { 10299 len += SCTP_BUF_LEN(at); 10300 at = SCTP_BUF_NEXT(at); 10301 } 10302 10303 ophdr->chunk_length = htons(len - sizeof(struct sctphdr)); 10304 if (len % 4) { 10305 /* need padding */ 10306 uint32_t cpthis = 0; 10307 int padlen; 10308 10309 padlen = 4 - (len % 4); 10310 m_copyback(scm, len, padlen, (caddr_t)&cpthis); 10311 len += padlen; 10312 } 10313 if ((sctp_no_csum_on_loopback) && SCTP_IS_IT_LOOPBACK(m)) { 10314 val = 0; 10315 } else { 10316 val = sctp_calculate_sum(scm, NULL, 0); 10317 } 10318 ohdr->checksum = val; 10319 if (iph->ip_v == IPVERSION) { 10320 /* V4 */ 10321 struct ip *out; 10322 sctp_route_t ro; 10323 10324 o_pak = SCTP_GET_HEADER_FOR_OUTPUT(sizeof(struct ip)); 10325 if (o_pak == NULL) { 10326 sctp_m_freem(scm); 10327 return; 10328 } 10329 SCTP_BUF_LEN(SCTP_HEADER_TO_CHAIN(o_pak)) = sizeof(struct ip); 10330 len += sizeof(struct ip); 10331 SCTP_ATTACH_CHAIN(o_pak, scm, len); 10332 bzero(&ro, sizeof ro); 10333 out = mtod(SCTP_HEADER_TO_CHAIN(o_pak), struct ip *); 10334 out->ip_v = iph->ip_v; 10335 out->ip_hl = (sizeof(struct ip) / 4); 10336 out->ip_tos = iph->ip_tos; 10337 out->ip_id = iph->ip_id; 10338 out->ip_off = 0; 10339 out->ip_ttl = MAXTTL; 10340 out->ip_p = IPPROTO_SCTP; 10341 out->ip_sum = 0; 10342 out->ip_src = iph->ip_dst; 10343 out->ip_dst = iph->ip_src; 10344 out->ip_len = SCTP_HEADER_LEN(o_pak); 10345 retcode = ip_output(o_pak, 0, &ro, IP_RAWOUTPUT, NULL 10346 ,NULL 10347 ); 10348 SCTP_STAT_INCR(sctps_sendpackets); 10349 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 10350 /* Free the route if we got one back */ 10351 if (ro.ro_rt) 10352 RTFREE(ro.ro_rt); 10353 } else { 10354 /* V6 */ 10355 struct route_in6 ro; 10356 struct ip6_hdr *out6, *in6; 10357 10358 o_pak = SCTP_GET_HEADER_FOR_OUTPUT(sizeof(struct ip6_hdr)); 10359 if (o_pak == NULL) { 10360 sctp_m_freem(scm); 10361 return; 10362 } 10363 SCTP_BUF_LEN(SCTP_HEADER_TO_CHAIN(o_pak)) = sizeof(struct ip6_hdr); 10364 len += sizeof(struct ip6_hdr); 10365 SCTP_ATTACH_CHAIN(o_pak, scm, len); 10366 10367 bzero(&ro, sizeof ro); 10368 in6 = mtod(m, struct ip6_hdr *); 10369 out6 = mtod(SCTP_HEADER_TO_CHAIN(o_pak), struct ip6_hdr *); 10370 out6->ip6_flow = in6->ip6_flow; 10371 out6->ip6_hlim = ip6_defhlim; 10372 out6->ip6_nxt = IPPROTO_SCTP; 10373 out6->ip6_src = in6->ip6_dst; 10374 out6->ip6_dst = in6->ip6_src; 10375 out6->ip6_plen = len - sizeof(struct ip6_hdr); 10376 #ifdef SCTP_DEBUG 10377 bzero(&lsa6, sizeof(lsa6)); 10378 lsa6.sin6_len = sizeof(lsa6); 10379 lsa6.sin6_family = AF_INET6; 10380 lsa6.sin6_addr = out6->ip6_src; 10381 bzero(&fsa6, sizeof(fsa6)); 10382 fsa6.sin6_len = sizeof(fsa6); 10383 fsa6.sin6_family = AF_INET6; 10384 fsa6.sin6_addr = out6->ip6_dst; 10385 if (sctp_debug_on & SCTP_DEBUG_OUTPUT2) { 10386 printf("sctp_operr_to calling ipv6 output:\n"); 10387 printf("src: "); 10388 sctp_print_address((struct sockaddr *)&lsa6); 10389 printf("dst "); 10390 sctp_print_address((struct sockaddr *)&fsa6); 10391 } 10392 #endif /* SCTP_DEBUG */ 10393 ip6_output(o_pak, NULL, &ro, 0, NULL, NULL 10394 ,NULL 10395 ); 10396 SCTP_STAT_INCR(sctps_sendpackets); 10397 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 10398 /* Free the route if we got one back */ 10399 if (ro.ro_rt) 10400 RTFREE(ro.ro_rt); 10401 } 10402 } 10403 10404 static struct mbuf * 10405 sctp_copy_resume(struct sctp_stream_queue_pending *sp, 10406 struct uio *uio, 10407 struct sctp_sndrcvinfo *srcv, 10408 int max_send_len, 10409 int user_marks_eor, 10410 int *error, 10411 uint32_t * sndout, 10412 struct mbuf **new_tail) 10413 { 10414 struct mbuf *m; 10415 10416 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0, 10417 (M_PKTHDR | (user_marks_eor ? M_EOR : 0))); 10418 if (m == NULL) 10419 *error = ENOMEM; 10420 else 10421 *sndout = m_length(m, NULL); 10422 *new_tail = m_last(m); 10423 return (m); 10424 } 10425 10426 static int 10427 sctp_copy_one(struct sctp_stream_queue_pending *sp, 10428 struct uio *uio, 10429 int resv_upfront) 10430 { 10431 int left; 10432 10433 left = sp->length; 10434 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length, 10435 resv_upfront, M_PKTHDR); 10436 if (sp->data == NULL) 10437 return (ENOMEM); 10438 10439 sp->tail_mbuf = m_last(sp->data); 10440 return (0); 10441 } 10442 10443 10444 10445 static struct sctp_stream_queue_pending * 10446 sctp_copy_it_in(struct sctp_tcb *stcb, 10447 struct sctp_association *asoc, 10448 struct sctp_sndrcvinfo *srcv, 10449 struct uio *uio, 10450 struct sctp_nets *net, 10451 int max_send_len, 10452 int user_marks_eor, 10453 int *error, 10454 int non_blocking) 10455 { 10456 /*- 10457 * This routine must be very careful in its work. Protocol 10458 * processing is up and running so care must be taken to spl...() 10459 * when you need to do something that may effect the stcb/asoc. The 10460 * sb is locked however. When data is copied the protocol processing 10461 * should be enabled since this is a slower operation... 10462 */ 10463 struct sctp_stream_queue_pending *sp = NULL; 10464 int resv_in_first; 10465 10466 *error = 0; 10467 /* Unless E_EOR mode is on, we must make a send FIT in one call. */ 10468 if (((user_marks_eor == 0) && non_blocking) && 10469 (uio->uio_resid > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) { 10470 /* It will NEVER fit */ 10471 *error = EMSGSIZE; 10472 goto out_now; 10473 } 10474 /* Now can we send this? */ 10475 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 10476 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 10477 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 10478 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 10479 /* got data while shutting down */ 10480 *error = ECONNRESET; 10481 goto out_now; 10482 } 10483 sctp_alloc_a_strmoq(stcb, sp); 10484 if (sp == NULL) { 10485 *error = ENOMEM; 10486 goto out_now; 10487 } 10488 sp->act_flags = 0; 10489 sp->sender_all_done = 0; 10490 sp->sinfo_flags = srcv->sinfo_flags; 10491 sp->timetolive = srcv->sinfo_timetolive; 10492 sp->ppid = srcv->sinfo_ppid; 10493 sp->context = srcv->sinfo_context; 10494 sp->strseq = 0; 10495 SCTP_GETTIME_TIMEVAL(&sp->ts); 10496 10497 sp->stream = srcv->sinfo_stream; 10498 sp->length = min(uio->uio_resid, max_send_len); 10499 if ((sp->length == uio->uio_resid) && 10500 ((user_marks_eor == 0) || 10501 (srcv->sinfo_flags & SCTP_EOF) || 10502 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR))) 10503 ) { 10504 sp->msg_is_complete = 1; 10505 } else { 10506 sp->msg_is_complete = 0; 10507 } 10508 sp->sender_all_done = 0; 10509 sp->some_taken = 0; 10510 sp->put_last_out = 0; 10511 resv_in_first = sizeof(struct sctp_data_chunk); 10512 sp->data = sp->tail_mbuf = NULL; 10513 *error = sctp_copy_one(sp, uio, resv_in_first); 10514 if (*error) { 10515 sctp_free_a_strmoq(stcb, sp); 10516 sp->data = NULL; 10517 sp->net = NULL; 10518 sp = NULL; 10519 } else { 10520 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 10521 sp->net = net; 10522 sp->addr_over = 1; 10523 } else { 10524 sp->net = asoc->primary_destination; 10525 sp->addr_over = 0; 10526 } 10527 atomic_add_int(&sp->net->ref_count, 1); 10528 sctp_set_prsctp_policy(stcb, sp); 10529 } 10530 out_now: 10531 return (sp); 10532 } 10533 10534 10535 10536 10537 int 10538 sctp_sosend(struct socket *so, 10539 struct sockaddr *addr, 10540 struct uio *uio, 10541 struct mbuf *top, 10542 struct mbuf *control, 10543 int flags 10544 , 10545 struct thread *p 10546 ) 10547 { 10548 struct sctp_inpcb *inp; 10549 int error, use_rcvinfo = 0; 10550 struct sctp_sndrcvinfo srcv; 10551 10552 inp = (struct sctp_inpcb *)so->so_pcb; 10553 if (control) { 10554 /* process cmsg snd/rcv info (maybe a assoc-id) */ 10555 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&srcv, control, 10556 sizeof(srcv))) { 10557 /* got one */ 10558 use_rcvinfo = 1; 10559 } 10560 } 10561 error = sctp_lower_sosend(so, addr, uio, top, 10562 control, 10563 flags, 10564 use_rcvinfo, &srcv 10565 ,p 10566 ); 10567 return (error); 10568 } 10569 10570 10571 int 10572 sctp_lower_sosend(struct socket *so, 10573 struct sockaddr *addr, 10574 struct uio *uio, 10575 struct mbuf *i_pak, 10576 struct mbuf *control, 10577 int flags, 10578 int use_rcvinfo, 10579 struct sctp_sndrcvinfo *srcv, 10580 struct thread *p 10581 ) 10582 { 10583 unsigned int sndlen, max_len; 10584 int error, len; 10585 struct mbuf *top = NULL; 10586 10587 #if defined(__NetBSD__) || defined(__OpenBSD_) 10588 int s; 10589 10590 #endif 10591 int queue_only = 0, queue_only_for_init = 0; 10592 int free_cnt_applied = 0; 10593 int un_sent = 0; 10594 int now_filled = 0; 10595 struct sctp_block_entry be; 10596 struct sctp_inpcb *inp; 10597 struct sctp_tcb *stcb = NULL; 10598 struct timeval now; 10599 struct sctp_nets *net; 10600 struct sctp_association *asoc; 10601 struct sctp_inpcb *t_inp; 10602 int create_lock_applied = 0; 10603 int nagle_applies = 0; 10604 int some_on_control = 0; 10605 int got_all_of_the_send = 0; 10606 int hold_tcblock = 0; 10607 int non_blocking = 0; 10608 10609 error = 0; 10610 net = NULL; 10611 stcb = NULL; 10612 asoc = NULL; 10613 t_inp = inp = (struct sctp_inpcb *)so->so_pcb; 10614 if (inp == NULL) { 10615 error = EFAULT; 10616 goto out_unlocked; 10617 } 10618 atomic_add_int(&inp->total_sends, 1); 10619 if (uio) 10620 sndlen = uio->uio_resid; 10621 else { 10622 sndlen = SCTP_HEADER_LEN(i_pak); 10623 top = SCTP_HEADER_TO_CHAIN(i_pak); 10624 } 10625 10626 hold_tcblock = 0; 10627 10628 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 10629 (inp->sctp_socket->so_qlimit)) { 10630 /* The listener can NOT send */ 10631 error = EFAULT; 10632 goto out_unlocked; 10633 } 10634 if ((use_rcvinfo) && srcv) { 10635 if (INVALID_SINFO_FLAG(srcv->sinfo_flags) || PR_SCTP_INVALID_POLICY(srcv->sinfo_flags)) { 10636 error = EINVAL; 10637 goto out_unlocked; 10638 } 10639 if (srcv->sinfo_flags) 10640 SCTP_STAT_INCR(sctps_sends_with_flags); 10641 10642 if (srcv->sinfo_flags & SCTP_SENDALL) { 10643 /* its a sendall */ 10644 error = sctp_sendall(inp, uio, top, srcv); 10645 top = NULL; 10646 goto out_unlocked; 10647 } 10648 } 10649 /* now we must find the assoc */ 10650 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 10651 SCTP_INP_RLOCK(inp); 10652 stcb = LIST_FIRST(&inp->sctp_asoc_list); 10653 if (stcb == NULL) { 10654 SCTP_INP_RUNLOCK(inp); 10655 error = ENOTCONN; 10656 goto out_unlocked; 10657 } 10658 hold_tcblock = 0; 10659 SCTP_INP_RUNLOCK(inp); 10660 if (addr) 10661 /* Must locate the net structure if addr given */ 10662 net = sctp_findnet(stcb, addr); 10663 else 10664 net = stcb->asoc.primary_destination; 10665 10666 } else if (use_rcvinfo && srcv && srcv->sinfo_assoc_id) { 10667 stcb = sctp_findassociation_ep_asocid(inp, srcv->sinfo_assoc_id, 0); 10668 if (stcb) { 10669 if (addr) 10670 /* 10671 * Must locate the net structure if addr 10672 * given 10673 */ 10674 net = sctp_findnet(stcb, addr); 10675 else 10676 net = stcb->asoc.primary_destination; 10677 } 10678 hold_tcblock = 0; 10679 } else if (addr) { 10680 /*- 10681 * Since we did not use findep we must 10682 * increment it, and if we don't find a tcb 10683 * decrement it. 10684 */ 10685 SCTP_INP_WLOCK(inp); 10686 SCTP_INP_INCR_REF(inp); 10687 SCTP_INP_WUNLOCK(inp); 10688 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 10689 if (stcb == NULL) { 10690 SCTP_INP_WLOCK(inp); 10691 SCTP_INP_DECR_REF(inp); 10692 SCTP_INP_WUNLOCK(inp); 10693 } else { 10694 hold_tcblock = 1; 10695 } 10696 } 10697 if ((stcb == NULL) && (addr)) { 10698 /* Possible implicit send? */ 10699 SCTP_ASOC_CREATE_LOCK(inp); 10700 create_lock_applied = 1; 10701 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || 10702 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 10703 /* Should I really unlock ? */ 10704 error = EFAULT; 10705 goto out_unlocked; 10706 10707 } 10708 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) && 10709 (addr->sa_family == AF_INET6)) { 10710 error = EINVAL; 10711 goto out_unlocked; 10712 } 10713 SCTP_INP_WLOCK(inp); 10714 SCTP_INP_INCR_REF(inp); 10715 SCTP_INP_WUNLOCK(inp); 10716 /* With the lock applied look again */ 10717 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 10718 if (stcb == NULL) { 10719 SCTP_INP_WLOCK(inp); 10720 SCTP_INP_DECR_REF(inp); 10721 SCTP_INP_WUNLOCK(inp); 10722 } else { 10723 hold_tcblock = 1; 10724 } 10725 } 10726 if (stcb == NULL) { 10727 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 10728 error = ENOTCONN; 10729 goto out_unlocked; 10730 } else if (addr == NULL) { 10731 error = ENOENT; 10732 goto out_unlocked; 10733 } else { 10734 /* 10735 * UDP style, we must go ahead and start the INIT 10736 * process 10737 */ 10738 uint32_t vrf_id; 10739 10740 if ((use_rcvinfo) && (srcv) && 10741 ((srcv->sinfo_flags & SCTP_ABORT) || 10742 ((srcv->sinfo_flags & SCTP_EOF) && 10743 (uio->uio_resid == 0)))) { 10744 /*- 10745 * User asks to abort a non-existant assoc, 10746 * or EOF a non-existant assoc with no data 10747 */ 10748 error = ENOENT; 10749 goto out_unlocked; 10750 } 10751 /* get an asoc/stcb struct */ 10752 10753 vrf_id = inp->def_vrf_id; 10754 stcb = sctp_aloc_assoc(inp, addr, 1, &error, 0, vrf_id); 10755 if (stcb == NULL) { 10756 /* Error is setup for us in the call */ 10757 goto out_unlocked; 10758 } 10759 if (create_lock_applied) { 10760 SCTP_ASOC_CREATE_UNLOCK(inp); 10761 create_lock_applied = 0; 10762 } else { 10763 printf("Huh-3? create lock should have been on??\n"); 10764 } 10765 /* 10766 * Turn on queue only flag to prevent data from 10767 * being sent 10768 */ 10769 queue_only = 1; 10770 asoc = &stcb->asoc; 10771 asoc->state = SCTP_STATE_COOKIE_WAIT; 10772 SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 10773 10774 /* initialize authentication params for the assoc */ 10775 sctp_initialize_auth_params(inp, stcb); 10776 10777 if (control) { 10778 /* 10779 * see if a init structure exists in cmsg 10780 * headers 10781 */ 10782 struct sctp_initmsg initm; 10783 int i; 10784 10785 if (sctp_find_cmsg(SCTP_INIT, (void *)&initm, control, 10786 sizeof(initm))) { 10787 /* 10788 * we have an INIT override of the 10789 * default 10790 */ 10791 if (initm.sinit_max_attempts) 10792 asoc->max_init_times = initm.sinit_max_attempts; 10793 if (initm.sinit_num_ostreams) 10794 asoc->pre_open_streams = initm.sinit_num_ostreams; 10795 if (initm.sinit_max_instreams) 10796 asoc->max_inbound_streams = initm.sinit_max_instreams; 10797 if (initm.sinit_max_init_timeo) 10798 asoc->initial_init_rto_max = initm.sinit_max_init_timeo; 10799 if (asoc->streamoutcnt < asoc->pre_open_streams) { 10800 /* Default is NOT correct */ 10801 #ifdef SCTP_DEBUG 10802 if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) { 10803 printf("Ok, defout:%d pre_open:%d\n", 10804 asoc->streamoutcnt, asoc->pre_open_streams); 10805 } 10806 #endif 10807 SCTP_FREE(asoc->strmout); 10808 asoc->strmout = NULL; 10809 asoc->streamoutcnt = asoc->pre_open_streams; 10810 /* 10811 * What happens if this 10812 * fails? .. we panic ... 10813 */ 10814 { 10815 struct sctp_stream_out *tmp_str; 10816 int had_lock = 0; 10817 10818 if (hold_tcblock) { 10819 had_lock = 1; 10820 SCTP_TCB_UNLOCK(stcb); 10821 } 10822 SCTP_MALLOC(tmp_str, 10823 struct sctp_stream_out *, 10824 asoc->streamoutcnt * 10825 sizeof(struct sctp_stream_out), 10826 "StreamsOut"); 10827 if (had_lock) { 10828 SCTP_TCB_LOCK(stcb); 10829 } 10830 if (asoc->strmout == NULL) { 10831 asoc->strmout = tmp_str; 10832 } else { 10833 SCTP_FREE(asoc->strmout); 10834 asoc->strmout = tmp_str; 10835 } 10836 } 10837 for (i = 0; i < asoc->streamoutcnt; i++) { 10838 /*- 10839 * inbound side must be set 10840 * to 0xffff, also NOTE when 10841 * we get the INIT-ACK back 10842 * (for INIT sender) we MUST 10843 * reduce the count 10844 * (streamoutcnt) but first 10845 * check if we sent to any 10846 * of the upper streams that 10847 * were dropped (if some 10848 * were). Those that were 10849 * dropped must be notified 10850 * to the upper layer as 10851 * failed to send. 10852 */ 10853 asoc->strmout[i].next_sequence_sent = 0x0; 10854 TAILQ_INIT(&asoc->strmout[i].outqueue); 10855 asoc->strmout[i].stream_no = i; 10856 asoc->strmout[i].last_msg_incomplete = 0; 10857 asoc->strmout[i].next_spoke.tqe_next = 0; 10858 asoc->strmout[i].next_spoke.tqe_prev = 0; 10859 } 10860 } 10861 } 10862 } 10863 hold_tcblock = 1; 10864 /* out with the INIT */ 10865 queue_only_for_init = 1; 10866 /*- 10867 * we may want to dig in after this call and adjust the MTU 10868 * value. It defaulted to 1500 (constant) but the ro 10869 * structure may now have an update and thus we may need to 10870 * change it BEFORE we append the message. 10871 */ 10872 net = stcb->asoc.primary_destination; 10873 asoc = &stcb->asoc; 10874 } 10875 } 10876 if ((SCTP_SO_IS_NBIO(so) 10877 || (flags & MSG_NBIO) 10878 )) { 10879 non_blocking = 1; 10880 } 10881 asoc = &stcb->asoc; 10882 10883 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) { 10884 if (sndlen > asoc->smallest_mtu) { 10885 error = EMSGSIZE; 10886 goto out_unlocked; 10887 } 10888 } 10889 /* would we block? */ 10890 if (non_blocking) { 10891 if ((SCTP_SB_LIMIT_SND(so) < 10892 (sndlen + stcb->asoc.total_output_queue_size)) || 10893 (stcb->asoc.chunks_on_out_queue > 10894 sctp_max_chunks_on_queue)) { 10895 error = EWOULDBLOCK; 10896 atomic_add_int(&stcb->sctp_ep->total_nospaces, 1); 10897 goto out_unlocked; 10898 } 10899 } 10900 /* Keep the stcb from being freed under our feet */ 10901 atomic_add_int(&stcb->asoc.refcnt, 1); 10902 free_cnt_applied = 1; 10903 10904 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 10905 error = ECONNRESET; 10906 goto out_unlocked; 10907 } 10908 if (create_lock_applied) { 10909 SCTP_ASOC_CREATE_UNLOCK(inp); 10910 create_lock_applied = 0; 10911 } 10912 if (asoc->stream_reset_outstanding) { 10913 /* 10914 * Can't queue any data while stream reset is underway. 10915 */ 10916 error = EAGAIN; 10917 goto out_unlocked; 10918 } 10919 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 10920 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 10921 queue_only = 1; 10922 } 10923 if ((use_rcvinfo == 0) || (srcv == NULL)) { 10924 /* Grab the default stuff from the asoc */ 10925 srcv = &stcb->asoc.def_send; 10926 } 10927 /* we are now done with all control */ 10928 if (control) { 10929 sctp_m_freem(control); 10930 control = NULL; 10931 } 10932 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 10933 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 10934 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 10935 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 10936 if ((use_rcvinfo) && 10937 (srcv->sinfo_flags & SCTP_ABORT)) { 10938 ; 10939 } else { 10940 error = ECONNRESET; 10941 goto out_unlocked; 10942 } 10943 } 10944 /* Ok, we will attempt a msgsnd :> */ 10945 if (p) { 10946 p->td_proc->p_stats->p_ru.ru_msgsnd++; 10947 } 10948 if (stcb) { 10949 if (net && ((srcv->sinfo_flags & SCTP_ADDR_OVER))) { 10950 /* we take the override or the unconfirmed */ 10951 ; 10952 } else { 10953 net = stcb->asoc.primary_destination; 10954 } 10955 } 10956 if ((net->flight_size > net->cwnd) && (sctp_cmt_on_off == 0)) { 10957 /*- 10958 * CMT: Added check for CMT above. net above is the primary 10959 * dest. If CMT is ON, sender should always attempt to send 10960 * with the output routine sctp_fill_outqueue() that loops 10961 * through all destination addresses. Therefore, if CMT is 10962 * ON, queue_only is NOT set to 1 here, so that 10963 * sctp_chunk_output() can be called below. 10964 */ 10965 queue_only = 1; 10966 10967 } else if (asoc->ifp_had_enobuf) { 10968 SCTP_STAT_INCR(sctps_ifnomemqueued); 10969 if (net->flight_size > (net->mtu * 2)) 10970 queue_only = 1; 10971 asoc->ifp_had_enobuf = 0; 10972 } else { 10973 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 10974 ((stcb->asoc.chunks_on_out_queue - stcb->asoc.total_flight_count) * sizeof(struct sctp_data_chunk))); 10975 } 10976 /* Are we aborting? */ 10977 if (srcv->sinfo_flags & SCTP_ABORT) { 10978 struct mbuf *mm; 10979 int tot_demand, tot_out, max; 10980 10981 SCTP_STAT_INCR(sctps_sends_with_abort); 10982 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 10983 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 10984 /* It has to be up before we abort */ 10985 /* how big is the user initiated abort? */ 10986 error = EINVAL; 10987 goto out; 10988 } 10989 if (hold_tcblock) { 10990 SCTP_TCB_UNLOCK(stcb); 10991 hold_tcblock = 0; 10992 } 10993 if (top) { 10994 struct mbuf *cntm; 10995 10996 mm = sctp_get_mbuf_for_msg(1, 0, M_WAIT, 1, MT_DATA); 10997 10998 tot_out = 0; 10999 cntm = top; 11000 while (cntm) { 11001 tot_out += SCTP_BUF_LEN(cntm); 11002 cntm = SCTP_BUF_NEXT(cntm); 11003 } 11004 tot_demand = (tot_out + sizeof(struct sctp_paramhdr)); 11005 } else { 11006 /* Must fit in a MTU */ 11007 tot_out = uio->uio_resid; 11008 tot_demand = (tot_out + sizeof(struct sctp_paramhdr)); 11009 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA); 11010 } 11011 if (mm == NULL) { 11012 error = ENOMEM; 11013 goto out; 11014 } 11015 max = asoc->smallest_mtu - sizeof(struct sctp_paramhdr); 11016 max -= sizeof(struct sctp_abort_msg); 11017 if (tot_out > max) { 11018 tot_out = max; 11019 } 11020 if (mm) { 11021 struct sctp_paramhdr *ph; 11022 11023 /* now move forward the data pointer */ 11024 ph = mtod(mm, struct sctp_paramhdr *); 11025 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 11026 ph->param_length = htons((sizeof(struct sctp_paramhdr) + tot_out)); 11027 ph++; 11028 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr); 11029 if (top == NULL) { 11030 error = uiomove((caddr_t)ph, (int)tot_out, uio); 11031 if (error) { 11032 /*- 11033 * Here if we can't get his data we 11034 * still abort we just don't get to 11035 * send the users note :-0 11036 */ 11037 sctp_m_freem(mm); 11038 mm = NULL; 11039 } 11040 } else { 11041 SCTP_BUF_NEXT(mm) = top; 11042 } 11043 } 11044 if (hold_tcblock == 0) { 11045 SCTP_TCB_LOCK(stcb); 11046 hold_tcblock = 1; 11047 } 11048 atomic_add_int(&stcb->asoc.refcnt, -1); 11049 free_cnt_applied = 0; 11050 /* release this lock, otherwise we hang on ourselves */ 11051 sctp_abort_an_association(stcb->sctp_ep, stcb, 11052 SCTP_RESPONSE_TO_USER_REQ, 11053 mm); 11054 /* now relock the stcb so everything is sane */ 11055 hold_tcblock = 0; 11056 stcb = NULL; 11057 goto out_unlocked; 11058 } 11059 /* Calculate the maximum we can send */ 11060 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) { 11061 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size; 11062 } else { 11063 max_len = 0; 11064 } 11065 if (hold_tcblock) { 11066 SCTP_TCB_UNLOCK(stcb); 11067 hold_tcblock = 0; 11068 } 11069 /* Is the stream no. valid? */ 11070 if (srcv->sinfo_stream >= asoc->streamoutcnt) { 11071 /* Invalid stream number */ 11072 error = EINVAL; 11073 goto out_unlocked; 11074 } 11075 if (asoc->strmout == NULL) { 11076 /* huh? software error */ 11077 error = EFAULT; 11078 goto out_unlocked; 11079 } 11080 len = 0; 11081 if (max_len < sctp_add_more_threshold) { 11082 /* No room right no ! */ 11083 SOCKBUF_LOCK(&so->so_snd); 11084 while (SCTP_SB_LIMIT_SND(so) < (stcb->asoc.total_output_queue_size + sctp_add_more_threshold)) { 11085 #ifdef SCTP_BLK_LOGGING 11086 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, 11087 so, asoc, uio->uio_resid); 11088 #endif 11089 be.error = 0; 11090 stcb->block_entry = &be; 11091 error = sbwait(&so->so_snd); 11092 stcb->block_entry = NULL; 11093 if (error || so->so_error || be.error) { 11094 if (error == 0) { 11095 if (so->so_error) 11096 error = so->so_error; 11097 if (be.error) { 11098 error = be.error; 11099 } 11100 } 11101 SOCKBUF_UNLOCK(&so->so_snd); 11102 goto out_unlocked; 11103 } 11104 #ifdef SCTP_BLK_LOGGING 11105 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 11106 so, asoc, stcb->asoc.total_output_queue_size); 11107 #endif 11108 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 11109 goto out_unlocked; 11110 } 11111 } 11112 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) { 11113 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size; 11114 } else { 11115 max_len = 0; 11116 } 11117 SOCKBUF_UNLOCK(&so->so_snd); 11118 } 11119 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 11120 goto out_unlocked; 11121 } 11122 atomic_add_int(&stcb->total_sends, 1); 11123 if (top == NULL) { 11124 struct sctp_stream_queue_pending *sp; 11125 11126 #ifdef INVARIANTS 11127 struct sctp_stream_queue_pending *msp; 11128 11129 #endif 11130 struct sctp_stream_out *strm; 11131 uint32_t sndout, initial_out; 11132 int user_marks_eor; 11133 11134 if (uio->uio_resid == 0) { 11135 if (srcv->sinfo_flags & SCTP_EOF) { 11136 got_all_of_the_send = 1; 11137 goto dataless_eof; 11138 } else { 11139 error = EINVAL; 11140 goto out; 11141 } 11142 } 11143 initial_out = uio->uio_resid; 11144 11145 if ((asoc->stream_locked) && 11146 (asoc->stream_locked_on != srcv->sinfo_stream)) { 11147 error = EAGAIN; 11148 goto out; 11149 } 11150 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 11151 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR); 11152 if (strm->last_msg_incomplete == 0) { 11153 do_a_copy_in: 11154 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error, non_blocking); 11155 if ((sp == NULL) || (error)) { 11156 goto out; 11157 } 11158 SCTP_TCB_SEND_LOCK(stcb); 11159 #ifdef INVARIANTS 11160 msp = TAILQ_LAST(&strm->outqueue, sctp_streamhead); 11161 if (msp && (msp->msg_is_complete == 0)) 11162 panic("Huh, new mesg and old not done?"); 11163 #endif 11164 if (sp->msg_is_complete) { 11165 strm->last_msg_incomplete = 0; 11166 asoc->stream_locked = 0; 11167 } else { 11168 /* 11169 * Just got locked to this guy in case of an 11170 * interupt. 11171 */ 11172 strm->last_msg_incomplete = 1; 11173 asoc->stream_locked = 1; 11174 asoc->stream_locked_on = srcv->sinfo_stream; 11175 sp->sender_all_done = 0; 11176 } 11177 sctp_snd_sb_alloc(stcb, sp->length); 11178 atomic_add_int(&asoc->stream_queue_cnt, 1); 11179 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) { 11180 sp->strseq = strm->next_sequence_sent; 11181 #ifdef SCTP_LOG_SENDING_STR 11182 sctp_misc_ints(SCTP_STRMOUT_LOG_ASSIGN, 11183 (uintptr_t) stcb, (uintptr_t) sp, 11184 (uint32_t) ((srcv->sinfo_stream << 16) | sp->strseq), 0); 11185 #endif 11186 strm->next_sequence_sent++; 11187 } else { 11188 SCTP_STAT_INCR(sctps_sends_with_unord); 11189 } 11190 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 11191 if ((strm->next_spoke.tqe_next == NULL) && 11192 (strm->next_spoke.tqe_prev == NULL)) { 11193 /* Not on wheel, insert */ 11194 sctp_insert_on_wheel(stcb, asoc, strm, 1); 11195 } 11196 SCTP_TCB_SEND_UNLOCK(stcb); 11197 } else { 11198 SCTP_TCB_SEND_LOCK(stcb); 11199 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead); 11200 SCTP_TCB_SEND_UNLOCK(stcb); 11201 if (sp == NULL) { 11202 /* ???? Huh ??? last msg is gone */ 11203 #ifdef INVARIANTS 11204 panic("Warning: Last msg marked incomplete, yet nothing left?"); 11205 #else 11206 printf("Warning: Last msg marked incomplete, yet nothing left?\n"); 11207 strm->last_msg_incomplete = 0; 11208 #endif 11209 goto do_a_copy_in; 11210 11211 } 11212 } 11213 while (uio->uio_resid > 0) { 11214 /* How much room do we have? */ 11215 struct mbuf *new_tail, *mm; 11216 11217 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 11218 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size; 11219 else 11220 max_len = 0; 11221 11222 if ((max_len > sctp_add_more_threshold) || 11223 (uio->uio_resid && (uio->uio_resid < max_len))) { 11224 sndout = 0; 11225 new_tail = NULL; 11226 if (hold_tcblock) { 11227 SCTP_TCB_UNLOCK(stcb); 11228 hold_tcblock = 0; 11229 } 11230 mm = sctp_copy_resume(sp, uio, srcv, max_len, user_marks_eor, &error, &sndout, &new_tail); 11231 if ((mm == NULL) || error) { 11232 if (mm) { 11233 sctp_m_freem(mm); 11234 } 11235 goto out; 11236 } 11237 /* Update the mbuf and count */ 11238 SCTP_TCB_SEND_LOCK(stcb); 11239 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 11240 /* 11241 * we need to get out. Peer probably 11242 * aborted. 11243 */ 11244 sctp_m_freem(mm); 11245 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) 11246 error = ECONNRESET; 11247 SCTP_TCB_SEND_UNLOCK(stcb); 11248 goto out; 11249 } 11250 if (sp->tail_mbuf) { 11251 /* tack it to the end */ 11252 SCTP_BUF_NEXT(sp->tail_mbuf) = mm; 11253 sp->tail_mbuf = new_tail; 11254 } else { 11255 /* A stolen mbuf */ 11256 sp->data = mm; 11257 sp->tail_mbuf = new_tail; 11258 } 11259 sctp_snd_sb_alloc(stcb, sndout); 11260 atomic_add_int(&sp->length, sndout); 11261 len += sndout; 11262 11263 /* Did we reach EOR? */ 11264 if ((uio->uio_resid == 0) && 11265 ((user_marks_eor == 0) || 11266 (srcv->sinfo_flags & SCTP_EOF) || 11267 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR))) 11268 ) { 11269 sp->msg_is_complete = 1; 11270 } else { 11271 sp->msg_is_complete = 0; 11272 } 11273 SCTP_TCB_SEND_UNLOCK(stcb); 11274 } 11275 if (uio->uio_resid == 0) { 11276 /* got it all? */ 11277 continue; 11278 } 11279 /* PR-SCTP? */ 11280 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) { 11281 /* 11282 * This is ugly but we must assure locking 11283 * order 11284 */ 11285 if (hold_tcblock == 0) { 11286 SCTP_TCB_LOCK(stcb); 11287 hold_tcblock = 1; 11288 } 11289 sctp_prune_prsctp(stcb, asoc, srcv, sndlen); 11290 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 11291 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size; 11292 else 11293 max_len = 0; 11294 if (max_len > 0) { 11295 continue; 11296 } 11297 SCTP_TCB_UNLOCK(stcb); 11298 hold_tcblock = 0; 11299 } 11300 /* wait for space now */ 11301 if (non_blocking) { 11302 /* Non-blocking io in place out */ 11303 goto skip_out_eof; 11304 } 11305 if ((net->flight_size > net->cwnd) && 11306 (sctp_cmt_on_off == 0)) { 11307 queue_only = 1; 11308 11309 } else if (asoc->ifp_had_enobuf) { 11310 SCTP_STAT_INCR(sctps_ifnomemqueued); 11311 if (net->flight_size > (net->mtu * 2)) { 11312 queue_only = 1; 11313 } else { 11314 queue_only = 0; 11315 } 11316 asoc->ifp_had_enobuf = 0; 11317 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 11318 ((stcb->asoc.chunks_on_out_queue - stcb->asoc.total_flight_count) * 11319 sizeof(struct sctp_data_chunk))); 11320 } else { 11321 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 11322 ((stcb->asoc.chunks_on_out_queue - stcb->asoc.total_flight_count) * 11323 sizeof(struct sctp_data_chunk))); 11324 queue_only = 0; 11325 } 11326 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 11327 (stcb->asoc.total_flight > 0) && 11328 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) 11329 ) { 11330 11331 /*- 11332 * Ok, Nagle is set on and we have data outstanding. 11333 * Don't send anything and let SACKs drive out the 11334 * data unless wen have a "full" segment to send. 11335 */ 11336 #ifdef SCTP_NAGLE_LOGGING 11337 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 11338 #endif 11339 SCTP_STAT_INCR(sctps_naglequeued); 11340 nagle_applies = 1; 11341 } else { 11342 #ifdef SCTP_NAGLE_LOGGING 11343 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 11344 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 11345 #endif 11346 SCTP_STAT_INCR(sctps_naglesent); 11347 nagle_applies = 0; 11348 } 11349 /* What about the INIT, send it maybe */ 11350 #ifdef SCTP_BLK_LOGGING 11351 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, nagle_applies, un_sent); 11352 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, stcb->asoc.total_flight, 11353 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); 11354 #endif 11355 if (queue_only_for_init) { 11356 if (hold_tcblock == 0) { 11357 SCTP_TCB_LOCK(stcb); 11358 hold_tcblock = 1; 11359 } 11360 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 11361 /* a collision took us forward? */ 11362 queue_only_for_init = 0; 11363 queue_only = 0; 11364 } else { 11365 sctp_send_initiate(inp, stcb); 11366 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 11367 queue_only_for_init = 0; 11368 queue_only = 1; 11369 } 11370 } 11371 if ((queue_only == 0) && (nagle_applies == 0) 11372 ) { 11373 /*- 11374 * need to start chunk output 11375 * before blocking.. note that if 11376 * a lock is already applied, then 11377 * the input via the net is happening 11378 * and I don't need to start output :-D 11379 */ 11380 if (hold_tcblock == 0) { 11381 if (SCTP_TCB_TRYLOCK(stcb)) { 11382 hold_tcblock = 1; 11383 sctp_chunk_output(inp, 11384 stcb, 11385 SCTP_OUTPUT_FROM_USR_SEND); 11386 11387 } 11388 } else { 11389 sctp_chunk_output(inp, 11390 stcb, 11391 SCTP_OUTPUT_FROM_USR_SEND); 11392 } 11393 if (hold_tcblock == 1) { 11394 SCTP_TCB_UNLOCK(stcb); 11395 hold_tcblock = 0; 11396 } 11397 } 11398 SOCKBUF_LOCK(&so->so_snd); 11399 /*- 11400 * This is a bit strange, but I think it will 11401 * work. The total_output_queue_size is locked and 11402 * protected by the TCB_LOCK, which we just released. 11403 * There is a race that can occur between releasing it 11404 * above, and me getting the socket lock, where sacks 11405 * come in but we have not put the SB_WAIT on the 11406 * so_snd buffer to get the wakeup. After the LOCK 11407 * is applied the sack_processing will also need to 11408 * LOCK the so->so_snd to do the actual sowwakeup(). So 11409 * once we have the socket buffer lock if we recheck the 11410 * size we KNOW we will get to sleep safely with the 11411 * wakeup flag in place. 11412 */ 11413 if (SCTP_SB_LIMIT_SND(so) < (stcb->asoc.total_output_queue_size + sctp_add_more_threshold)) { 11414 #ifdef SCTP_BLK_LOGGING 11415 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK, 11416 so, asoc, uio->uio_resid); 11417 #endif 11418 be.error = 0; 11419 stcb->block_entry = &be; 11420 error = sbwait(&so->so_snd); 11421 stcb->block_entry = NULL; 11422 11423 if (error || so->so_error || be.error) { 11424 if (error == 0) { 11425 if (so->so_error) 11426 error = so->so_error; 11427 if (be.error) { 11428 error = be.error; 11429 } 11430 } 11431 SOCKBUF_UNLOCK(&so->so_snd); 11432 goto out_unlocked; 11433 } 11434 #ifdef SCTP_BLK_LOGGING 11435 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 11436 so, asoc, stcb->asoc.total_output_queue_size); 11437 #endif 11438 } 11439 SOCKBUF_UNLOCK(&so->so_snd); 11440 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 11441 goto out_unlocked; 11442 } 11443 } 11444 SCTP_TCB_SEND_LOCK(stcb); 11445 if (sp) { 11446 if (sp->msg_is_complete == 0) { 11447 strm->last_msg_incomplete = 1; 11448 asoc->stream_locked = 1; 11449 asoc->stream_locked_on = srcv->sinfo_stream; 11450 } else { 11451 sp->sender_all_done = 1; 11452 strm->last_msg_incomplete = 0; 11453 asoc->stream_locked = 0; 11454 } 11455 } else { 11456 printf("Huh no sp TSNH?\n"); 11457 strm->last_msg_incomplete = 0; 11458 asoc->stream_locked = 0; 11459 11460 } 11461 SCTP_TCB_SEND_UNLOCK(stcb); 11462 if (uio->uio_resid == 0) { 11463 got_all_of_the_send = 1; 11464 } 11465 } else if (top) { 11466 /* We send in a 0, since we do NOT have any locks */ 11467 error = sctp_msg_append(stcb, net, top, srcv, 0); 11468 top = NULL; 11469 } 11470 if (error) { 11471 goto out; 11472 } 11473 dataless_eof: 11474 /* EOF thing ? */ 11475 if ((srcv->sinfo_flags & SCTP_EOF) && 11476 (got_all_of_the_send == 1) && 11477 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) 11478 ) { 11479 SCTP_STAT_INCR(sctps_sends_with_eof); 11480 error = 0; 11481 if (hold_tcblock == 0) { 11482 SCTP_TCB_LOCK(stcb); 11483 hold_tcblock = 1; 11484 } 11485 if (TAILQ_EMPTY(&asoc->send_queue) && 11486 TAILQ_EMPTY(&asoc->sent_queue) && 11487 (asoc->stream_queue_cnt == 0)) { 11488 if (asoc->locked_on_sending) { 11489 goto abort_anyway; 11490 } 11491 /* there is nothing queued to send, so I'm done... */ 11492 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 11493 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 11494 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 11495 /* only send SHUTDOWN the first time through */ 11496 sctp_send_shutdown(stcb, stcb->asoc.primary_destination); 11497 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 11498 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 11499 } 11500 asoc->state = SCTP_STATE_SHUTDOWN_SENT; 11501 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 11502 asoc->primary_destination); 11503 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 11504 asoc->primary_destination); 11505 } 11506 } else { 11507 /*- 11508 * we still got (or just got) data to send, so set 11509 * SHUTDOWN_PENDING 11510 */ 11511 /*- 11512 * XXX sockets draft says that SCTP_EOF should be 11513 * sent with no data. currently, we will allow user 11514 * data to be sent first and move to 11515 * SHUTDOWN-PENDING 11516 */ 11517 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 11518 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 11519 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 11520 if (hold_tcblock == 0) { 11521 SCTP_TCB_LOCK(stcb); 11522 hold_tcblock = 1; 11523 } 11524 if (asoc->locked_on_sending) { 11525 /* Locked to send out the data */ 11526 struct sctp_stream_queue_pending *sp; 11527 11528 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 11529 if (sp) { 11530 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 11531 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 11532 } 11533 } 11534 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 11535 if (TAILQ_EMPTY(&asoc->send_queue) && 11536 TAILQ_EMPTY(&asoc->sent_queue) && 11537 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 11538 abort_anyway: 11539 if (free_cnt_applied) { 11540 atomic_add_int(&stcb->asoc.refcnt, -1); 11541 free_cnt_applied = 0; 11542 } 11543 sctp_abort_an_association(stcb->sctp_ep, stcb, 11544 SCTP_RESPONSE_TO_USER_REQ, 11545 NULL); 11546 /* 11547 * now relock the stcb so everything 11548 * is sane 11549 */ 11550 hold_tcblock = 0; 11551 stcb = NULL; 11552 goto out; 11553 } 11554 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 11555 asoc->primary_destination); 11556 } 11557 } 11558 } 11559 skip_out_eof: 11560 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { 11561 some_on_control = 1; 11562 } 11563 if ((net->flight_size > net->cwnd) && 11564 (sctp_cmt_on_off == 0)) { 11565 queue_only = 1; 11566 } else if (asoc->ifp_had_enobuf) { 11567 SCTP_STAT_INCR(sctps_ifnomemqueued); 11568 if (net->flight_size > (net->mtu * 2)) { 11569 queue_only = 1; 11570 } else { 11571 queue_only = 0; 11572 } 11573 asoc->ifp_had_enobuf = 0; 11574 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 11575 ((stcb->asoc.chunks_on_out_queue - stcb->asoc.total_flight_count) * 11576 sizeof(struct sctp_data_chunk))); 11577 } else { 11578 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 11579 ((stcb->asoc.chunks_on_out_queue - stcb->asoc.total_flight_count) * 11580 sizeof(struct sctp_data_chunk))); 11581 queue_only = 0; 11582 } 11583 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 11584 (stcb->asoc.total_flight > 0) && 11585 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) 11586 ) { 11587 11588 /*- 11589 * Ok, Nagle is set on and we have data outstanding. 11590 * Don't send anything and let SACKs drive out the 11591 * data unless wen have a "full" segment to send. 11592 */ 11593 #ifdef SCTP_NAGLE_LOGGING 11594 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 11595 #endif 11596 SCTP_STAT_INCR(sctps_naglequeued); 11597 nagle_applies = 1; 11598 } else { 11599 #ifdef SCTP_NAGLE_LOGGING 11600 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 11601 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 11602 #endif 11603 SCTP_STAT_INCR(sctps_naglesent); 11604 nagle_applies = 0; 11605 } 11606 if (queue_only_for_init) { 11607 if (hold_tcblock == 0) { 11608 SCTP_TCB_LOCK(stcb); 11609 hold_tcblock = 1; 11610 } 11611 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 11612 /* a collision took us forward? */ 11613 queue_only_for_init = 0; 11614 queue_only = 0; 11615 } else { 11616 sctp_send_initiate(inp, stcb); 11617 if (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING) 11618 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT | 11619 SCTP_STATE_SHUTDOWN_PENDING; 11620 else 11621 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 11622 queue_only_for_init = 0; 11623 queue_only = 1; 11624 } 11625 } 11626 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) { 11627 /* we can attempt to send too. */ 11628 if (hold_tcblock == 0) { 11629 /* 11630 * If there is activity recv'ing sacks no need to 11631 * send 11632 */ 11633 if (SCTP_TCB_TRYLOCK(stcb)) { 11634 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND); 11635 hold_tcblock = 1; 11636 } 11637 } else { 11638 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND); 11639 } 11640 } else if ((queue_only == 0) && 11641 (stcb->asoc.peers_rwnd == 0) && 11642 (stcb->asoc.total_flight == 0)) { 11643 /* We get to have a probe outstanding */ 11644 if (hold_tcblock == 0) { 11645 hold_tcblock = 1; 11646 SCTP_TCB_LOCK(stcb); 11647 } 11648 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND); 11649 } else if (some_on_control) { 11650 int num_out, reason, cwnd_full, frag_point; 11651 11652 /* Here we do control only */ 11653 if (hold_tcblock == 0) { 11654 hold_tcblock = 1; 11655 SCTP_TCB_LOCK(stcb); 11656 } 11657 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 11658 sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 11659 &reason, 1, &cwnd_full, 1, &now, &now_filled, frag_point); 11660 } 11661 #ifdef SCTP_DEBUG 11662 if (sctp_debug_on & SCTP_DEBUG_OUTPUT1) { 11663 printf("USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d \n", 11664 queue_only, stcb->asoc.peers_rwnd, un_sent, 11665 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue, 11666 stcb->asoc.total_output_queue_size); 11667 } 11668 #endif 11669 out: 11670 out_unlocked: 11671 11672 if (create_lock_applied) { 11673 SCTP_ASOC_CREATE_UNLOCK(inp); 11674 create_lock_applied = 0; 11675 } 11676 if ((stcb) && hold_tcblock) { 11677 SCTP_TCB_UNLOCK(stcb); 11678 } 11679 if (stcb && free_cnt_applied) { 11680 atomic_add_int(&stcb->asoc.refcnt, -1); 11681 } 11682 #ifdef INVARIANTS 11683 if (stcb) { 11684 if (mtx_owned(&stcb->tcb_mtx)) { 11685 panic("Leaving with tcb mtx owned?"); 11686 } 11687 if (mtx_owned(&stcb->tcb_send_mtx)) { 11688 panic("Leaving with tcb send mtx owned?"); 11689 } 11690 } 11691 #endif 11692 if (top) { 11693 sctp_m_freem(top); 11694 } 11695 if (control) { 11696 sctp_m_freem(control); 11697 } 11698 return (error); 11699 } 11700 11701 11702 /* 11703 * generate an AUTHentication chunk, if required 11704 */ 11705 struct mbuf * 11706 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end, 11707 struct sctp_auth_chunk **auth_ret, uint32_t * offset, 11708 struct sctp_tcb *stcb, uint8_t chunk) 11709 { 11710 struct mbuf *m_auth; 11711 struct sctp_auth_chunk *auth; 11712 int chunk_len; 11713 11714 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) || 11715 (stcb == NULL)) 11716 return (m); 11717 11718 /* sysctl disabled auth? */ 11719 if (sctp_auth_disable) 11720 return (m); 11721 11722 /* peer doesn't do auth... */ 11723 if (!stcb->asoc.peer_supports_auth) { 11724 return (m); 11725 } 11726 /* does the requested chunk require auth? */ 11727 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) { 11728 return (m); 11729 } 11730 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER); 11731 if (m_auth == NULL) { 11732 /* no mbuf's */ 11733 return (m); 11734 } 11735 /* reserve some space if this will be the first mbuf */ 11736 if (m == NULL) 11737 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD); 11738 /* fill in the AUTH chunk details */ 11739 auth = mtod(m_auth, struct sctp_auth_chunk *); 11740 bzero(auth, sizeof(*auth)); 11741 auth->ch.chunk_type = SCTP_AUTHENTICATION; 11742 auth->ch.chunk_flags = 0; 11743 chunk_len = sizeof(*auth) + 11744 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id); 11745 auth->ch.chunk_length = htons(chunk_len); 11746 auth->hmac_id = htons(stcb->asoc.peer_hmac_id); 11747 /* key id and hmac digest will be computed and filled in upon send */ 11748 11749 /* save the offset where the auth was inserted into the chain */ 11750 if (m != NULL) { 11751 struct mbuf *cn; 11752 11753 *offset = 0; 11754 cn = m; 11755 while (cn) { 11756 *offset += SCTP_BUF_LEN(cn); 11757 cn = SCTP_BUF_NEXT(cn); 11758 } 11759 } else 11760 *offset = 0; 11761 11762 /* update length and return pointer to the auth chunk */ 11763 SCTP_BUF_LEN(m_auth) = chunk_len; 11764 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0); 11765 if (auth_ret != NULL) 11766 *auth_ret = auth; 11767 11768 return (m); 11769 } 11770