1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <sys/types.h> 28 #include <sys/systm.h> 29 #include <sys/stream.h> 30 #include <sys/cmn_err.h> 31 #include <sys/socket.h> 32 #include <sys/kmem.h> 33 #include <sys/strsubr.h> 34 #include <sys/strsun.h> 35 36 #include <netinet/in.h> 37 #include <netinet/ip6.h> 38 #include <netinet/sctp.h> 39 40 #include <inet/common.h> 41 #include <inet/ip.h> 42 #include <inet/ip6.h> 43 #include <inet/mib2.h> 44 #include <inet/ipclassifier.h> 45 #include "sctp_impl.h" 46 #include "sctp_asconf.h" 47 #include "sctp_addr.h" 48 49 typedef struct sctp_asconf_s { 50 mblk_t *head; 51 uint32_t cid; 52 } sctp_asconf_t; 53 54 /* 55 * This is only used on a clustered node to maintain pre-allocated buffer info. 56 * before sending an ASCONF chunk. The reason for pre-allocation is we don't 57 * want to fail allocating memory when we get then ASCONF-ACK in order to 58 * update the clustering subsystem's state for this assoc. 59 */ 60 typedef struct sctp_cl_ainfo_s { 61 uchar_t *sctp_cl_alist; 62 size_t sctp_cl_asize; 63 uchar_t *sctp_cl_dlist; 64 size_t sctp_cl_dsize; 65 } sctp_cl_ainfo_t; 66 67 /* 68 * The ASCONF chunk per-parameter request interface. ph is the 69 * parameter header for the parameter in the request, and cid 70 * is the parameters correlation ID. cont should be set to 1 71 * if the ASCONF framework should continue processing request 72 * parameters following this one, or 0 if it should stop. If 73 * cont is -1, this indicates complete memory depletion, which 74 * will cause the ASCONF framework to abort building a reply. If 75 * act is 1, the callback should take whatever action it needs 76 * to fulfil this request. If act is 0, this request has already 77 * been processed, so the callback should only verify and pass 78 * back error parameters, and not take any action. 79 * 80 * The callback should return an mblk with any reply enclosed, 81 * with the correlation ID in the first four bytes of the 82 * message. A NULL return implies implicit success to the 83 * requestor. 84 */ 85 typedef mblk_t *sctp_asconf_func_t(sctp_t *, sctp_parm_hdr_t *ph, uint32_t cid, 86 sctp_faddr_t *, int *cont, int act, in6_addr_t *addr); 87 88 /* 89 * The ASCONF chunk per-parameter ACK interface. ph is the parameter 90 * header for the parameter returned in the ACK, and oph is the 91 * original parameter sent out in the ASCONF request. 92 * If the peer implicitly responded OK (by not including an 93 * explicit OK for the request), ph will be NULL. 94 * ph can also point to an Unrecognized Parameter parameter, 95 * in which case the peer did not understand the request 96 * parameter. 97 * 98 * ph and oph parameter headers are in host byte order. Encapsulated 99 * parameters will still be in network byte order. 100 */ 101 typedef void sctp_asconf_ack_func_t(sctp_t *, sctp_parm_hdr_t *ph, 102 sctp_parm_hdr_t *oph, sctp_faddr_t *, in6_addr_t *addr); 103 104 typedef struct { 105 uint16_t id; 106 sctp_asconf_func_t *asconf; 107 sctp_asconf_ack_func_t *asconf_ack; 108 } dispatch_t; 109 110 static sctp_asconf_func_t sctp_addip_req, sctp_setprim_req, 111 sctp_asconf_unrec_parm; 112 113 static sctp_asconf_ack_func_t sctp_addip_ack, sctp_setprim_ack, 114 sctp_asconf_ack_unrec_parm; 115 116 static const dispatch_t sctp_asconf_dispatch_tbl[] = { 117 /* ID ASCONF ASCONF_ACK */ 118 { PARM_ADD_IP, sctp_addip_req, sctp_addip_ack }, 119 { PARM_DEL_IP, sctp_addip_req, sctp_addip_ack }, 120 { PARM_SET_PRIMARY, sctp_setprim_req, sctp_setprim_ack } 121 }; 122 123 static const dispatch_t sctp_asconf_default_dispatch = { 124 0, sctp_asconf_unrec_parm, sctp_asconf_ack_unrec_parm 125 }; 126 127 /* 128 * ASCONF framework 129 */ 130 131 static const dispatch_t * 132 sctp_lookup_asconf_dispatch(int id) 133 { 134 int i; 135 136 for (i = 0; i < A_CNT(sctp_asconf_dispatch_tbl); i++) { 137 if (sctp_asconf_dispatch_tbl[i].id == id) { 138 return (sctp_asconf_dispatch_tbl + i); 139 } 140 } 141 142 return (&sctp_asconf_default_dispatch); 143 } 144 145 /* 146 * Frees mp on failure 147 */ 148 static mblk_t * 149 sctp_asconf_prepend_errwrap(mblk_t *mp, uint32_t cid) 150 { 151 mblk_t *wmp; 152 sctp_parm_hdr_t *wph; 153 154 /* Prepend a wrapper err cause ind param */ 155 wmp = allocb(sizeof (*wph) + sizeof (cid), BPRI_MED); 156 if (wmp == NULL) { 157 freemsg(mp); 158 return (NULL); 159 } 160 wmp->b_wptr += sizeof (*wph) + sizeof (cid); 161 wph = (sctp_parm_hdr_t *)wmp->b_rptr; 162 wph->sph_type = htons(PARM_ERROR_IND); 163 wph->sph_len = htons(msgdsize(mp) + sizeof (*wph) + sizeof (cid)); 164 bcopy(&cid, wph + 1, sizeof (uint32_t)); 165 166 wmp->b_cont = mp; 167 return (wmp); 168 } 169 170 /*ARGSUSED*/ 171 static mblk_t * 172 sctp_asconf_unrec_parm(sctp_t *sctp, sctp_parm_hdr_t *ph, uint32_t cid, 173 sctp_faddr_t *fp, int *cont, int act, in6_addr_t *addr) 174 { 175 mblk_t *mp = NULL; 176 177 /* Unrecognized param; check the high order bits */ 178 if ((ph->sph_type & SCTP_UNREC_PARAM_MASK) == 179 (SCTP_CONT_PROC_PARAMS | SCTP_REPORT_THIS_PARAM)) { 180 /* report unrecognized param, and keep processing */ 181 sctp_add_unrec_parm(ph, &mp, B_FALSE); 182 if (mp == NULL) { 183 *cont = -1; 184 return (NULL); 185 } 186 /* Prepend a the CID and a wrapper err cause ind param */ 187 mp = sctp_asconf_prepend_errwrap(mp, cid); 188 if (mp == NULL) { 189 *cont = -1; 190 return (NULL); 191 } 192 193 *cont = 1; 194 return (mp); 195 } 196 if (ph->sph_type & SCTP_REPORT_THIS_PARAM) { 197 /* Stop processing and drop; report unrecognized param */ 198 sctp_add_unrec_parm(ph, &mp, B_FALSE); 199 if (mp == NULL) { 200 *cont = -1; 201 return (NULL); 202 } 203 /* Prepend a the CID and a wrapper err cause ind param */ 204 mp = sctp_asconf_prepend_errwrap(mp, cid); 205 if (mp == NULL) { 206 *cont = -1; 207 return (NULL); 208 } 209 210 *cont = 0; 211 return (mp); 212 } 213 if (ph->sph_type & SCTP_CONT_PROC_PARAMS) { 214 /* skip and continue processing */ 215 *cont = 1; 216 return (NULL); 217 } 218 219 /* 2 high bits are clear; stop processing and drop packet */ 220 *cont = 0; 221 return (NULL); 222 } 223 224 /*ARGSUSED*/ 225 static void 226 sctp_asconf_ack_unrec_parm(sctp_t *sctp, sctp_parm_hdr_t *ph, 227 sctp_parm_hdr_t *oph, sctp_faddr_t *fp, in6_addr_t *laddr) 228 { 229 ASSERT(ph); 230 sctp_error_event(sctp, (sctp_chunk_hdr_t *)ph); 231 } 232 233 static void 234 sctp_asconf_init(sctp_asconf_t *asc) 235 { 236 ASSERT(asc != NULL); 237 238 asc->head = NULL; 239 asc->cid = 0; 240 } 241 242 static int 243 sctp_asconf_add(sctp_asconf_t *asc, mblk_t *mp) 244 { 245 uint32_t *cp; 246 247 /* XXX can't exceed MTU */ 248 249 cp = (uint32_t *)(mp->b_rptr + sizeof (sctp_parm_hdr_t)); 250 *cp = asc->cid++; 251 252 if (asc->head == NULL) 253 asc->head = mp; 254 else 255 linkb(asc->head, mp); 256 257 return (0); 258 } 259 260 static void 261 sctp_asconf_destroy(sctp_asconf_t *asc) 262 { 263 if (asc->head != NULL) { 264 freemsg(asc->head); 265 asc->head = NULL; 266 } 267 asc->cid = 0; 268 } 269 270 static int 271 sctp_asconf_send(sctp_t *sctp, sctp_asconf_t *asc, sctp_faddr_t *fp, 272 sctp_cl_ainfo_t *ainfo) 273 { 274 mblk_t *mp, *nmp; 275 sctp_chunk_hdr_t *ch; 276 boolean_t isv4; 277 size_t msgsize; 278 279 ASSERT(asc != NULL && asc->head != NULL); 280 281 isv4 = (fp != NULL) ? fp->isv4 : sctp->sctp_current->isv4; 282 283 /* SCTP chunk header + Serial Number + Address Param TLV */ 284 msgsize = sizeof (*ch) + sizeof (uint32_t) + 285 (isv4 ? PARM_ADDR4_LEN : PARM_ADDR6_LEN); 286 287 mp = allocb(msgsize, BPRI_MED); 288 if (mp == NULL) 289 return (ENOMEM); 290 291 mp->b_wptr += msgsize; 292 mp->b_cont = asc->head; 293 294 ch = (sctp_chunk_hdr_t *)mp->b_rptr; 295 ch->sch_id = CHUNK_ASCONF; 296 ch->sch_flags = 0; 297 ch->sch_len = htons(msgdsize(mp)); 298 299 nmp = msgpullup(mp, -1); 300 if (nmp == NULL) { 301 freeb(mp); 302 return (ENOMEM); 303 } 304 305 /* 306 * Stash the address list and the count so that when the operation 307 * completes, i.e. when as get an ACK, we can update the clustering's 308 * state for this association. 309 */ 310 if (ainfo != NULL) { 311 ASSERT(cl_sctp_assoc_change != NULL); 312 ASSERT(nmp->b_prev == NULL); 313 nmp->b_prev = (mblk_t *)ainfo; 314 } 315 /* Clean up the temporary mblk chain */ 316 freemsg(mp); 317 asc->head = NULL; 318 asc->cid = 0; 319 320 /* Queue it ... */ 321 if (sctp->sctp_cxmit_list == NULL) { 322 sctp->sctp_cxmit_list = nmp; 323 } else { 324 linkb(sctp->sctp_cxmit_list, nmp); 325 } 326 327 BUMP_LOCAL(sctp->sctp_obchunks); 328 329 /* And try to send it. */ 330 sctp_wput_asconf(sctp, fp); 331 332 return (0); 333 } 334 335 /* 336 * If the peer does not understand an ASCONF chunk, we simply 337 * clear out the cxmit_list, since we can send nothing further 338 * that the peer will understand. 339 * 340 * Assumes chunk length has already been checked. 341 */ 342 /*ARGSUSED*/ 343 void 344 sctp_asconf_free_cxmit(sctp_t *sctp, sctp_chunk_hdr_t *ch) 345 { 346 mblk_t *mp; 347 mblk_t *mp1; 348 sctp_cl_ainfo_t *ainfo; 349 350 if (sctp->sctp_cxmit_list == NULL) { 351 /* Nothing pending */ 352 return; 353 } 354 355 mp = sctp->sctp_cxmit_list; 356 while (mp != NULL) { 357 mp1 = mp->b_cont; 358 mp->b_cont = NULL; 359 if (mp->b_prev != NULL) { 360 ainfo = (sctp_cl_ainfo_t *)mp->b_prev; 361 mp->b_prev = NULL; 362 kmem_free(ainfo->sctp_cl_alist, ainfo->sctp_cl_asize); 363 kmem_free(ainfo->sctp_cl_dlist, ainfo->sctp_cl_dsize); 364 kmem_free(ainfo, sizeof (*ainfo)); 365 } 366 freeb(mp); 367 mp = mp1; 368 } 369 sctp->sctp_cxmit_list = NULL; 370 } 371 372 void 373 sctp_input_asconf(sctp_t *sctp, sctp_chunk_hdr_t *ch, sctp_faddr_t *fp) 374 { 375 const dispatch_t *dp; 376 mblk_t *hmp; 377 mblk_t *mp; 378 uint32_t *idp; 379 uint32_t *hidp; 380 ssize_t rlen; 381 sctp_parm_hdr_t *ph; 382 sctp_chunk_hdr_t *ach; 383 int cont; 384 int act; 385 uint16_t plen; 386 uchar_t *alist = NULL; 387 size_t asize = 0; 388 uchar_t *dlist = NULL; 389 size_t dsize = 0; 390 uchar_t *aptr = NULL; 391 uchar_t *dptr = NULL; 392 int acount = 0; 393 int dcount = 0; 394 sctp_stack_t *sctps = sctp->sctp_sctps; 395 396 ASSERT(ch->sch_id == CHUNK_ASCONF); 397 398 idp = (uint32_t *)(ch + 1); 399 rlen = ntohs(ch->sch_len) - sizeof (*ch) - sizeof (*idp); 400 401 if (rlen < 0 || rlen < sizeof (*idp)) { 402 /* nothing there; bail out */ 403 return; 404 } 405 406 /* Check for duplicates */ 407 *idp = ntohl(*idp); 408 if (*idp == (sctp->sctp_fcsn + 1)) { 409 act = 1; 410 } else if (*idp == sctp->sctp_fcsn) { 411 act = 0; 412 } else { 413 /* stale or malicious packet; drop */ 414 return; 415 } 416 417 /* Create the ASCONF_ACK header */ 418 hmp = sctp_make_mp(sctp, fp, sizeof (*ach) + sizeof (*idp)); 419 if (hmp == NULL) { 420 /* Let the peer retransmit */ 421 SCTP_KSTAT(sctps, sctp_send_asconf_ack_failed); 422 return; 423 } 424 ach = (sctp_chunk_hdr_t *)hmp->b_wptr; 425 ach->sch_id = CHUNK_ASCONF_ACK; 426 ach->sch_flags = 0; 427 /* Set the length later */ 428 hidp = (uint32_t *)(ach + 1); 429 *hidp = htonl(*idp); 430 hmp->b_wptr = (uchar_t *)(hidp + 1); 431 432 /* Move to the Address Parameter */ 433 ph = (sctp_parm_hdr_t *)(idp + 1); 434 if (rlen <= ntohs(ph->sph_len)) { 435 freeb(hmp); 436 return; 437 } 438 439 /* 440 * We already have the association here, so this address parameter 441 * doesn't seem to be very useful, should we make sure this is part 442 * of the association and send an error, if not? 443 * Ignore it for now. 444 */ 445 rlen -= ntohs(ph->sph_len); 446 ph = (sctp_parm_hdr_t *)((char *)ph + ntohs(ph->sph_len)); 447 448 /* 449 * We need to pre-allocate buffer before processing the ASCONF 450 * chunk. We don't want to fail allocating buffers after processing 451 * the ASCONF chunk. So, we walk the list and get the number of 452 * addresses added and/or deleted. 453 */ 454 if (cl_sctp_assoc_change != NULL) { 455 sctp_parm_hdr_t *oph = ph; 456 ssize_t orlen = rlen; 457 458 /* 459 * This not very efficient, but there is no better way of 460 * doing it. It should be fine since normally the param list 461 * will not be very long. 462 */ 463 while (orlen > 0) { 464 /* Sanity checks */ 465 if (orlen < sizeof (*oph)) 466 break; 467 plen = ntohs(oph->sph_len); 468 if (plen < sizeof (*oph) || plen > orlen) 469 break; 470 if (oph->sph_type == htons(PARM_ADD_IP)) 471 acount++; 472 if (oph->sph_type == htons(PARM_DEL_IP)) 473 dcount++; 474 oph = sctp_next_parm(oph, &orlen); 475 if (oph == NULL) 476 break; 477 } 478 if (acount > 0 || dcount > 0) { 479 if (acount > 0) { 480 asize = sizeof (in6_addr_t) * acount; 481 alist = kmem_alloc(asize, KM_NOSLEEP); 482 if (alist == NULL) { 483 freeb(hmp); 484 SCTP_KSTAT(sctps, sctp_cl_assoc_change); 485 return; 486 } 487 } 488 if (dcount > 0) { 489 dsize = sizeof (in6_addr_t) * dcount; 490 dlist = kmem_alloc(dsize, KM_NOSLEEP); 491 if (dlist == NULL) { 492 if (acount > 0) 493 kmem_free(alist, asize); 494 freeb(hmp); 495 SCTP_KSTAT(sctps, sctp_cl_assoc_change); 496 return; 497 } 498 } 499 aptr = alist; 500 dptr = dlist; 501 /* 502 * We will get the actual count when we process 503 * the chunk. 504 */ 505 acount = 0; 506 dcount = 0; 507 } 508 } 509 cont = 1; 510 while (rlen > 0 && cont) { 511 in6_addr_t addr; 512 513 /* Sanity checks */ 514 if (rlen < sizeof (*ph)) 515 break; 516 plen = ntohs(ph->sph_len); 517 if (plen < sizeof (*ph) || plen > rlen) { 518 break; 519 } 520 idp = (uint32_t *)(ph + 1); 521 dp = sctp_lookup_asconf_dispatch(ntohs(ph->sph_type)); 522 ASSERT(dp); 523 if (dp->asconf) { 524 mp = dp->asconf(sctp, ph, *idp, fp, &cont, act, &addr); 525 if (cont == -1) { 526 /* 527 * Not even enough memory to create 528 * an out-of-resources error. Free 529 * everything and return; the peer 530 * should retransmit. 531 */ 532 freemsg(hmp); 533 if (alist != NULL) 534 kmem_free(alist, asize); 535 if (dlist != NULL) 536 kmem_free(dlist, dsize); 537 return; 538 } 539 if (mp != NULL) { 540 linkb(hmp, mp); 541 } else if (act != 0) { 542 /* update the add/delete list */ 543 if (cl_sctp_assoc_change != NULL) { 544 if (ph->sph_type == 545 htons(PARM_ADD_IP)) { 546 ASSERT(alist != NULL); 547 bcopy(&addr, aptr, 548 sizeof (addr)); 549 aptr += sizeof (addr); 550 acount++; 551 } else if (ph->sph_type == 552 htons(PARM_DEL_IP)) { 553 ASSERT(dlist != NULL); 554 bcopy(&addr, dptr, 555 sizeof (addr)); 556 dptr += sizeof (addr); 557 dcount++; 558 } 559 } 560 } 561 } 562 ph = sctp_next_parm(ph, &rlen); 563 if (ph == NULL) 564 break; 565 } 566 567 /* 568 * Update clustering's state for this assoc. Note acount/dcount 569 * could be zero (i.e. if the add/delete address(es) were not 570 * processed successfully). Regardless, if the ?size is > 0, 571 * it is the clustering module's responsibility to free the lists. 572 */ 573 if (cl_sctp_assoc_change != NULL) { 574 (*cl_sctp_assoc_change)(sctp->sctp_family, alist, asize, 575 acount, dlist, dsize, dcount, SCTP_CL_PADDR, 576 (cl_sctp_handle_t)sctp); 577 /* alist and dlist will be freed by the clustering module */ 578 } 579 /* Now that the params have been processed, increment the fcsn */ 580 if (act) { 581 sctp->sctp_fcsn++; 582 } 583 BUMP_LOCAL(sctp->sctp_obchunks); 584 585 if (fp->isv4) 586 ach->sch_len = htons(msgdsize(hmp) - sctp->sctp_hdr_len); 587 else 588 ach->sch_len = htons(msgdsize(hmp) - sctp->sctp_hdr6_len); 589 sctp_set_iplen(sctp, hmp); 590 591 sctp_add_sendq(sctp, hmp); 592 sctp_validate_peer(sctp); 593 } 594 595 static sctp_parm_hdr_t * 596 sctp_lookup_asconf_param(sctp_parm_hdr_t *ph, uint32_t cid, ssize_t rlen) 597 { 598 uint32_t *idp; 599 600 while (rlen > 0) { 601 idp = (uint32_t *)(ph + 1); 602 if (*idp == cid) { 603 return (ph); 604 } 605 ph = sctp_next_parm(ph, &rlen); 606 if (ph == NULL) 607 break; 608 } 609 return (NULL); 610 } 611 612 void 613 sctp_input_asconf_ack(sctp_t *sctp, sctp_chunk_hdr_t *ch, sctp_faddr_t *fp) 614 { 615 const dispatch_t *dp; 616 uint32_t *idp; 617 uint32_t *snp; 618 ssize_t rlen; 619 ssize_t plen; 620 sctp_parm_hdr_t *ph; 621 sctp_parm_hdr_t *oph; 622 sctp_parm_hdr_t *fph; 623 mblk_t *mp; 624 sctp_chunk_hdr_t *och; 625 int redosrcs = 0; 626 uint16_t param_len; 627 uchar_t *alist; 628 uchar_t *dlist; 629 uint_t acount = 0; 630 uint_t dcount = 0; 631 uchar_t *aptr; 632 uchar_t *dptr; 633 sctp_cl_ainfo_t *ainfo; 634 in6_addr_t addr; 635 636 ASSERT(ch->sch_id == CHUNK_ASCONF_ACK); 637 638 snp = (uint32_t *)(ch + 1); 639 rlen = ntohs(ch->sch_len) - sizeof (*ch) - sizeof (*snp); 640 if (rlen < 0) { 641 return; 642 } 643 644 /* Accept only an ACK for the current serial number */ 645 *snp = ntohl(*snp); 646 if (sctp->sctp_cxmit_list == NULL || *snp != (sctp->sctp_lcsn - 1)) { 647 /* Need to send an abort */ 648 return; 649 } 650 sctp->sctp_cchunk_pend = 0; 651 SCTP_FADDR_RC_TIMER_STOP(fp); 652 653 mp = sctp->sctp_cxmit_list; 654 /* 655 * We fill in the addresses here to update the clustering's state for 656 * this assoc. 657 */ 658 if (mp != NULL && cl_sctp_assoc_change != NULL) { 659 ASSERT(mp->b_prev != NULL); 660 ainfo = (sctp_cl_ainfo_t *)mp->b_prev; 661 alist = ainfo->sctp_cl_alist; 662 dlist = ainfo->sctp_cl_dlist; 663 aptr = alist; 664 dptr = dlist; 665 } 666 667 /* 668 * Pass explicit replies to callbacks: 669 * For each reply in the ACK, look up the corresponding 670 * original parameter in the request using the correlation 671 * ID, and pass it to the right callback. 672 */ 673 och = (sctp_chunk_hdr_t *)sctp->sctp_cxmit_list->b_rptr; 674 675 plen = ntohs(och->sch_len) - sizeof (*och) - sizeof (*idp); 676 idp = (uint32_t *)(och + 1); 677 678 /* Get to the 1st ASCONF param, need to skip Address TLV parm */ 679 fph = (sctp_parm_hdr_t *)(idp + 1); 680 plen -= ntohs(fph->sph_len); 681 fph = (sctp_parm_hdr_t *)((char *)fph + ntohs(fph->sph_len)); 682 ph = (sctp_parm_hdr_t *)(snp + 1); 683 while (rlen > 0) { 684 /* Sanity checks */ 685 if (rlen < sizeof (*ph)) { 686 break; 687 } 688 param_len = ntohs(ph->sph_len); 689 if (param_len < sizeof (*ph) || param_len > rlen) { 690 break; 691 } 692 idp = (uint32_t *)(ph + 1); 693 oph = sctp_lookup_asconf_param(fph, *idp, plen); 694 if (oph != NULL) { 695 dp = sctp_lookup_asconf_dispatch(ntohs(oph->sph_type)); 696 ASSERT(dp); 697 if (dp->asconf_ack) { 698 dp->asconf_ack(sctp, ph, oph, fp, &addr); 699 700 /* hack. see below */ 701 if (oph->sph_type == htons(PARM_ADD_IP) || 702 oph->sph_type == htons(PARM_DEL_IP)) { 703 redosrcs = 1; 704 /* 705 * If the address was sucessfully 706 * processed, add it to the add/delete 707 * list to send to the clustering 708 * module. 709 */ 710 if (cl_sctp_assoc_change != NULL && 711 !SCTP_IS_ADDR_UNSPEC( 712 IN6_IS_ADDR_V4MAPPED(&addr), 713 addr)) { 714 if (oph->sph_type == 715 htons(PARM_ADD_IP)) { 716 bcopy(&addr, aptr, 717 sizeof (addr)); 718 aptr += sizeof (addr); 719 acount++; 720 } else { 721 bcopy(&addr, dptr, 722 sizeof (addr)); 723 dptr += sizeof (addr); 724 dcount++; 725 } 726 } 727 } 728 } 729 } 730 731 ph = sctp_next_parm(ph, &rlen); 732 if (ph == NULL) 733 break; 734 } 735 736 /* 737 * Pass implicit replies to callbacks: 738 * For each original request, look up its parameter 739 * in the ACK. If there is no corresponding reply, 740 * call the callback with a NULL parameter, indicating 741 * success. 742 */ 743 rlen = plen; 744 plen = ntohs(ch->sch_len) - sizeof (*ch) - sizeof (*idp); 745 oph = fph; 746 fph = (sctp_parm_hdr_t *)((char *)ch + sizeof (sctp_chunk_hdr_t) + 747 sizeof (uint32_t)); 748 while (rlen > 0) { 749 idp = (uint32_t *)(oph + 1); 750 ph = sctp_lookup_asconf_param(fph, *idp, plen); 751 if (ph == NULL) { 752 dp = sctp_lookup_asconf_dispatch(ntohs(oph->sph_type)); 753 ASSERT(dp); 754 if (dp->asconf_ack) { 755 dp->asconf_ack(sctp, NULL, oph, fp, &addr); 756 757 /* hack. see below */ 758 if (oph->sph_type == htons(PARM_ADD_IP) || 759 oph->sph_type == htons(PARM_DEL_IP)) { 760 redosrcs = 1; 761 /* 762 * If the address was sucessfully 763 * processed, add it to the add/delete 764 * list to send to the clustering 765 * module. 766 */ 767 if (cl_sctp_assoc_change != NULL && 768 !SCTP_IS_ADDR_UNSPEC( 769 IN6_IS_ADDR_V4MAPPED(&addr), 770 addr)) { 771 if (oph->sph_type == 772 htons(PARM_ADD_IP)) { 773 bcopy(&addr, aptr, 774 sizeof (addr)); 775 aptr += sizeof (addr); 776 acount++; 777 } else { 778 bcopy(&addr, dptr, 779 sizeof (addr)); 780 dptr += sizeof (addr); 781 dcount++; 782 } 783 } 784 } 785 } 786 } 787 oph = sctp_next_parm(oph, &rlen); 788 if (oph == NULL) { 789 break; 790 } 791 } 792 793 /* We can now free up the first chunk in the cxmit list */ 794 sctp->sctp_cxmit_list = mp->b_cont; 795 mp->b_cont = NULL; 796 797 fp = SCTP_CHUNK_DEST(mp); 798 ASSERT(fp != NULL && fp->suna >= MBLKL(mp)); 799 fp->suna -= MBLKL(mp); 800 801 /* 802 * Update clustering's state for this assoc. Note acount/dcount 803 * could be zero (i.e. if the add/delete address(es) did not 804 * succeed). Regardless, if the ?size is > 0, it is the clustering 805 * module's responsibility to free the lists. 806 */ 807 if (cl_sctp_assoc_change != NULL) { 808 ASSERT(mp->b_prev != NULL); 809 mp->b_prev = NULL; 810 ainfo->sctp_cl_alist = NULL; 811 ainfo->sctp_cl_dlist = NULL; 812 (*cl_sctp_assoc_change)(sctp->sctp_family, alist, 813 ainfo->sctp_cl_asize, acount, dlist, ainfo->sctp_cl_dsize, 814 dcount, SCTP_CL_LADDR, (cl_sctp_handle_t)sctp); 815 /* alist and dlist will be freed by the clustering module */ 816 ainfo->sctp_cl_asize = 0; 817 ainfo->sctp_cl_dsize = 0; 818 kmem_free(ainfo, sizeof (*ainfo)); 819 } 820 freeb(mp); 821 822 /* can now send the next control chunk */ 823 if (sctp->sctp_cxmit_list != NULL) 824 sctp_wput_asconf(sctp, NULL); 825 826 /* 827 * If an add-ip or del-ip has completed (successfully or 828 * unsuccessfully), the pool of available source addresses 829 * may have changed, so we need to redo faddr source 830 * address selections. This is a bit of a hack since 831 * this really belongs in the add/del-ip code. However, 832 * that code consists of callbacks called for *each* 833 * add/del-ip parameter, and sctp_redo_faddr_srcs() is 834 * expensive enough that we really don't want to be 835 * doing it for each one. So we do it once here. 836 */ 837 if (redosrcs) 838 sctp_redo_faddr_srcs(sctp); 839 } 840 841 static void 842 sctp_rc_timer(sctp_t *sctp, sctp_faddr_t *fp) 843 { 844 #define SCTP_CLR_SENT_FLAG(mp) ((mp)->b_flag &= ~SCTP_CHUNK_FLAG_SENT) 845 sctp_faddr_t *nfp; 846 sctp_faddr_t *ofp; 847 sctp_stack_t *sctps = sctp->sctp_sctps; 848 849 ASSERT(fp != NULL); 850 851 fp->rc_timer_running = 0; 852 853 if (sctp->sctp_state != SCTPS_ESTABLISHED || 854 sctp->sctp_cxmit_list == NULL) { 855 return; 856 } 857 /* 858 * Not a retransmission, this was deferred due to some error 859 * condition 860 */ 861 if (!SCTP_CHUNK_ISSENT(sctp->sctp_cxmit_list)) { 862 sctp_wput_asconf(sctp, fp); 863 return; 864 } 865 /* 866 * The sent flag indicates if the msg has been sent on this fp. 867 */ 868 SCTP_CLR_SENT_FLAG(sctp->sctp_cxmit_list); 869 /* Retransmission */ 870 if (sctp->sctp_strikes >= sctp->sctp_pa_max_rxt) { 871 /* time to give up */ 872 BUMP_MIB(&sctps->sctps_mib, sctpAborted); 873 sctp_assoc_event(sctp, SCTP_COMM_LOST, 0, NULL); 874 sctp_clean_death(sctp, ETIMEDOUT); 875 return; 876 } 877 if (fp->strikes >= fp->max_retr) { 878 if (sctp_faddr_dead(sctp, fp, SCTP_FADDRS_DOWN) == -1) 879 return; 880 } 881 882 fp->strikes++; 883 sctp->sctp_strikes++; 884 SCTP_CALC_RXT(sctp, fp); 885 886 nfp = sctp_rotate_faddr(sctp, fp); 887 sctp->sctp_cchunk_pend = 0; 888 ofp = SCTP_CHUNK_DEST(sctp->sctp_cxmit_list); 889 SCTP_SET_CHUNK_DEST(sctp->sctp_cxmit_list, NULL); 890 ASSERT(ofp != NULL && ofp == fp); 891 ASSERT(ofp->suna >= MBLKL(sctp->sctp_cxmit_list)); 892 /* 893 * Enter slow start for this destination. 894 * XXX anything in the data path that needs to be considered? 895 */ 896 ofp->ssthresh = ofp->cwnd / 2; 897 if (ofp->ssthresh < 2 * ofp->sfa_pmss) 898 ofp->ssthresh = 2 * ofp->sfa_pmss; 899 ofp->cwnd = ofp->sfa_pmss; 900 ofp->pba = 0; 901 ofp->suna -= MBLKL(sctp->sctp_cxmit_list); 902 /* 903 * The rexmit flags is used to determine if a serial number needs to 904 * be assigned or not, so once set we leave it there. 905 */ 906 if (!SCTP_CHUNK_WANT_REXMIT(sctp->sctp_cxmit_list)) 907 SCTP_CHUNK_REXMIT(sctp->sctp_cxmit_list); 908 sctp_wput_asconf(sctp, nfp); 909 #undef SCTP_CLR_SENT_FLAG 910 } 911 912 void 913 sctp_wput_asconf(sctp_t *sctp, sctp_faddr_t *fp) 914 { 915 #define SCTP_SET_SENT_FLAG(mp) ((mp)->b_flag = SCTP_CHUNK_FLAG_SENT) 916 917 mblk_t *mp; 918 mblk_t *ipmp; 919 uint32_t *snp; 920 sctp_parm_hdr_t *ph; 921 boolean_t isv4; 922 sctp_stack_t *sctps = sctp->sctp_sctps; 923 boolean_t saddr_set; 924 925 if (sctp->sctp_cchunk_pend || sctp->sctp_cxmit_list == NULL || 926 /* Queue it for later transmission if not yet established */ 927 sctp->sctp_state < SCTPS_ESTABLISHED) { 928 ip2dbg(("sctp_wput_asconf: cchunk pending? (%d) or null "\ 929 "sctp_cxmit_list? (%s) or incorrect state? (%x)\n", 930 sctp->sctp_cchunk_pend, sctp->sctp_cxmit_list == NULL ? 931 "yes" : "no", sctp->sctp_state)); 932 return; 933 } 934 935 if (fp == NULL) 936 fp = sctp->sctp_current; 937 938 /* OK to send */ 939 ipmp = sctp_make_mp(sctp, fp, 0); 940 if (ipmp == NULL) { 941 SCTP_FADDR_RC_TIMER_RESTART(sctp, fp, fp->rto); 942 SCTP_KSTAT(sctps, sctp_send_asconf_failed); 943 return; 944 } 945 mp = sctp->sctp_cxmit_list; 946 /* Fill in the mandatory Address Parameter TLV */ 947 isv4 = (fp != NULL) ? fp->isv4 : sctp->sctp_current->isv4; 948 ph = (sctp_parm_hdr_t *)(mp->b_rptr + sizeof (sctp_chunk_hdr_t) + 949 sizeof (uint32_t)); 950 if (isv4) { 951 ipha_t *ipha = (ipha_t *)ipmp->b_rptr; 952 in6_addr_t ipaddr; 953 ipaddr_t addr4; 954 955 ph->sph_type = htons(PARM_ADDR4); 956 ph->sph_len = htons(PARM_ADDR4_LEN); 957 if (ipha->ipha_src != INADDR_ANY) { 958 bcopy(&ipha->ipha_src, ph + 1, IP_ADDR_LEN); 959 } else { 960 ipaddr = sctp_get_valid_addr(sctp, B_FALSE, &saddr_set); 961 /* 962 * All the addresses are down. 963 * Maybe we might have better luck next time. 964 */ 965 if (!saddr_set) { 966 SCTP_FADDR_RC_TIMER_RESTART(sctp, fp, fp->rto); 967 freeb(ipmp); 968 return; 969 } 970 IN6_V4MAPPED_TO_IPADDR(&ipaddr, addr4); 971 bcopy(&addr4, ph + 1, IP_ADDR_LEN); 972 } 973 } else { 974 ip6_t *ip6 = (ip6_t *)ipmp->b_rptr; 975 in6_addr_t ipaddr; 976 977 ph->sph_type = htons(PARM_ADDR6); 978 ph->sph_len = htons(PARM_ADDR6_LEN); 979 if (!IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { 980 bcopy(&ip6->ip6_src, ph + 1, IPV6_ADDR_LEN); 981 } else { 982 ipaddr = sctp_get_valid_addr(sctp, B_TRUE, &saddr_set); 983 /* 984 * All the addresses are down. 985 * Maybe we might have better luck next time. 986 */ 987 if (!saddr_set) { 988 SCTP_FADDR_RC_TIMER_RESTART(sctp, fp, fp->rto); 989 freeb(ipmp); 990 return; 991 } 992 bcopy(&ipaddr, ph + 1, IPV6_ADDR_LEN); 993 } 994 } 995 996 /* Don't exceed CWND */ 997 if ((MBLKL(mp) > (fp->cwnd - fp->suna)) || 998 ((mp = dupb(sctp->sctp_cxmit_list)) == NULL)) { 999 SCTP_FADDR_RC_TIMER_RESTART(sctp, fp, fp->rto); 1000 freeb(ipmp); 1001 return; 1002 } 1003 1004 /* Set the serial number now, if sending for the first time */ 1005 if (!SCTP_CHUNK_WANT_REXMIT(mp)) { 1006 snp = (uint32_t *)(mp->b_rptr + sizeof (sctp_chunk_hdr_t)); 1007 *snp = htonl(sctp->sctp_lcsn++); 1008 } 1009 SCTP_CHUNK_CLEAR_FLAGS(mp); 1010 fp->suna += MBLKL(mp); 1011 /* Attach the header and send the chunk */ 1012 ipmp->b_cont = mp; 1013 sctp_set_iplen(sctp, ipmp); 1014 sctp->sctp_cchunk_pend = 1; 1015 1016 SCTP_SET_SENT_FLAG(sctp->sctp_cxmit_list); 1017 SCTP_SET_CHUNK_DEST(sctp->sctp_cxmit_list, fp); 1018 sctp_add_sendq(sctp, ipmp); 1019 SCTP_FADDR_RC_TIMER_RESTART(sctp, fp, fp->rto); 1020 #undef SCTP_SET_SENT_FLAG 1021 } 1022 1023 /* 1024 * Generate ASCONF error param, include errph, if present. 1025 */ 1026 static mblk_t * 1027 sctp_asconf_adderr(int err, sctp_parm_hdr_t *errph, uint32_t cid) 1028 { 1029 mblk_t *mp; 1030 sctp_parm_hdr_t *eph; 1031 sctp_parm_hdr_t *wph; 1032 size_t len; 1033 size_t elen = 0; 1034 1035 len = sizeof (*wph) + sizeof (*eph) + sizeof (cid); 1036 if (errph != NULL) { 1037 elen = ntohs(errph->sph_len); 1038 len += elen; 1039 } 1040 mp = allocb(len, BPRI_MED); 1041 if (mp == NULL) { 1042 return (NULL); 1043 } 1044 wph = (sctp_parm_hdr_t *)mp->b_rptr; 1045 /* error cause wrapper */ 1046 wph->sph_type = htons(PARM_ERROR_IND); 1047 wph->sph_len = htons(len); 1048 bcopy(&cid, wph + 1, sizeof (uint32_t)); 1049 1050 /* error cause */ 1051 eph = (sctp_parm_hdr_t *)((char *)wph + sizeof (sctp_parm_hdr_t) + 1052 sizeof (cid)); 1053 eph->sph_type = htons(err); 1054 eph->sph_len = htons(len - sizeof (*wph) - sizeof (cid)); 1055 mp->b_wptr = (uchar_t *)(eph + 1); 1056 1057 /* details */ 1058 if (elen > 0) { 1059 bcopy(errph, mp->b_wptr, elen); 1060 mp->b_wptr += elen; 1061 } 1062 return (mp); 1063 } 1064 1065 static mblk_t * 1066 sctp_check_addip_addr(sctp_parm_hdr_t *ph, sctp_parm_hdr_t *oph, int *cont, 1067 uint32_t cid, in6_addr_t *raddr) 1068 { 1069 uint16_t atype; 1070 uint16_t alen; 1071 mblk_t *mp; 1072 in6_addr_t addr; 1073 ipaddr_t *addr4; 1074 1075 atype = ntohs(ph->sph_type); 1076 alen = ntohs(ph->sph_len); 1077 1078 if (atype != PARM_ADDR4 && atype != PARM_ADDR6) { 1079 mp = sctp_asconf_adderr(SCTP_ERR_BAD_MANDPARM, oph, cid); 1080 if (mp == NULL) { 1081 *cont = -1; 1082 } 1083 return (mp); 1084 } 1085 if ((atype == PARM_ADDR4 && alen < PARM_ADDR4_LEN) || 1086 (atype == PARM_ADDR6 && alen < PARM_ADDR6_LEN)) { 1087 mp = sctp_asconf_adderr(SCTP_ERR_BAD_MANDPARM, oph, cid); 1088 if (mp == NULL) { 1089 *cont = -1; 1090 } 1091 return (mp); 1092 } 1093 1094 /* Address parameter is present; extract and screen it */ 1095 if (atype == PARM_ADDR4) { 1096 addr4 = (ipaddr_t *)(ph + 1); 1097 IN6_IPADDR_TO_V4MAPPED(*addr4, &addr); 1098 1099 /* screen XXX loopback to scoping */ 1100 if (*addr4 == 0 || *addr4 == INADDR_BROADCAST || 1101 *addr4 == htonl(INADDR_LOOPBACK) || CLASSD(*addr4)) { 1102 dprint(1, ("addip: addr not unicast: %x:%x:%x:%x\n", 1103 SCTP_PRINTADDR(addr))); 1104 mp = sctp_asconf_adderr(SCTP_ERR_BAD_MANDPARM, oph, 1105 cid); 1106 if (mp == NULL) { 1107 *cont = -1; 1108 } 1109 return (mp); 1110 } 1111 /* 1112 * XXX also need to check for subnet 1113 * broadcasts. This should probably 1114 * wait until we have full access 1115 * to the ILL tables. 1116 */ 1117 1118 } else { 1119 bcopy(ph + 1, &addr, sizeof (addr)); 1120 1121 /* screen XXX loopback to scoping */ 1122 if (IN6_IS_ADDR_LINKLOCAL(&addr) || 1123 IN6_IS_ADDR_MULTICAST(&addr) || 1124 IN6_IS_ADDR_LOOPBACK(&addr)) { 1125 dprint(1, ("addip: addr not unicast: %x:%x:%x:%x\n", 1126 SCTP_PRINTADDR(addr))); 1127 mp = sctp_asconf_adderr(SCTP_ERR_BAD_MANDPARM, oph, 1128 cid); 1129 if (mp == NULL) { 1130 *cont = -1; 1131 } 1132 return (mp); 1133 } 1134 1135 } 1136 1137 /* OK */ 1138 *raddr = addr; 1139 return (NULL); 1140 } 1141 1142 /* 1143 * Handles both add and delete address requests. 1144 */ 1145 static mblk_t * 1146 sctp_addip_req(sctp_t *sctp, sctp_parm_hdr_t *ph, uint32_t cid, 1147 sctp_faddr_t *fp, int *cont, int act, in6_addr_t *raddr) 1148 { 1149 in6_addr_t addr; 1150 uint16_t type; 1151 mblk_t *mp; 1152 sctp_faddr_t *nfp; 1153 sctp_parm_hdr_t *oph = ph; 1154 int err; 1155 sctp_stack_t *sctps = sctp->sctp_sctps; 1156 1157 *cont = 1; 1158 1159 /* Send back an authorization error if addip is disabled */ 1160 if (!sctps->sctps_addip_enabled) { 1161 err = SCTP_ERR_UNAUTHORIZED; 1162 goto error_handler; 1163 } 1164 /* Check input */ 1165 if (ntohs(ph->sph_len) < (sizeof (*ph) * 2)) { 1166 err = SCTP_ERR_BAD_MANDPARM; 1167 goto error_handler; 1168 } 1169 1170 type = ntohs(ph->sph_type); 1171 ph = (sctp_parm_hdr_t *)((char *)ph + sizeof (sctp_parm_hdr_t) + 1172 sizeof (cid)); 1173 mp = sctp_check_addip_addr(ph, oph, cont, cid, &addr); 1174 if (mp != NULL) 1175 return (mp); 1176 if (raddr != NULL) 1177 *raddr = addr; 1178 if (type == PARM_ADD_IP) { 1179 if (sctp_lookup_faddr(sctp, &addr) != NULL) { 1180 /* Address is already part of association */ 1181 dprint(1, ("addip: addr already here: %x:%x:%x:%x\n", 1182 SCTP_PRINTADDR(addr))); 1183 err = SCTP_ERR_BAD_MANDPARM; 1184 goto error_handler; 1185 } 1186 1187 if (!act) { 1188 return (NULL); 1189 } 1190 /* Add the new address */ 1191 mutex_enter(&sctp->sctp_conn_tfp->tf_lock); 1192 err = sctp_add_faddr(sctp, &addr, KM_NOSLEEP, B_FALSE); 1193 mutex_exit(&sctp->sctp_conn_tfp->tf_lock); 1194 if (err == ENOMEM) { 1195 /* no memory */ 1196 *cont = -1; 1197 return (NULL); 1198 } 1199 if (err != 0) { 1200 err = SCTP_ERR_BAD_MANDPARM; 1201 goto error_handler; 1202 } 1203 sctp_intf_event(sctp, addr, SCTP_ADDR_ADDED, 0); 1204 } else if (type == PARM_DEL_IP) { 1205 nfp = sctp_lookup_faddr(sctp, &addr); 1206 if (nfp == NULL) { 1207 /* 1208 * Peer is trying to delete an address that is not 1209 * part of the association. 1210 */ 1211 dprint(1, ("delip: addr not here: %x:%x:%x:%x\n", 1212 SCTP_PRINTADDR(addr))); 1213 err = SCTP_ERR_BAD_MANDPARM; 1214 goto error_handler; 1215 } 1216 if (sctp->sctp_faddrs == nfp && nfp->next == NULL) { 1217 /* Peer is trying to delete last address */ 1218 dprint(1, ("delip: del last addr: %x:%x:%x:%x\n", 1219 SCTP_PRINTADDR(addr))); 1220 err = SCTP_ERR_DEL_LAST_ADDR; 1221 goto error_handler; 1222 } 1223 if (nfp == fp) { 1224 /* Peer is trying to delete source address */ 1225 dprint(1, ("delip: del src addr: %x:%x:%x:%x\n", 1226 SCTP_PRINTADDR(addr))); 1227 err = SCTP_ERR_DEL_SRC_ADDR; 1228 goto error_handler; 1229 } 1230 if (!act) { 1231 return (NULL); 1232 } 1233 1234 sctp_unlink_faddr(sctp, nfp); 1235 /* Update all references to the deleted faddr */ 1236 if (sctp->sctp_primary == nfp) { 1237 sctp->sctp_primary = fp; 1238 } 1239 if (sctp->sctp_current == nfp) { 1240 sctp_set_faddr_current(sctp, fp); 1241 } 1242 if (sctp->sctp_lastdata == nfp) { 1243 sctp->sctp_lastdata = fp; 1244 } 1245 if (sctp->sctp_shutdown_faddr == nfp) { 1246 sctp->sctp_shutdown_faddr = nfp; 1247 } 1248 if (sctp->sctp_lastfaddr == nfp) { 1249 for (fp = sctp->sctp_faddrs; fp->next; fp = fp->next) 1250 ; 1251 sctp->sctp_lastfaddr = fp; 1252 } 1253 sctp_intf_event(sctp, addr, SCTP_ADDR_REMOVED, 0); 1254 } else { 1255 ASSERT(0); 1256 } 1257 1258 /* Successful, don't need to return anything. */ 1259 return (NULL); 1260 1261 error_handler: 1262 mp = sctp_asconf_adderr(err, oph, cid); 1263 if (mp == NULL) 1264 *cont = -1; 1265 return (mp); 1266 } 1267 1268 /* 1269 * Handles both add and delete IP ACKs. 1270 */ 1271 /*ARGSUSED*/ 1272 static void 1273 sctp_addip_ack(sctp_t *sctp, sctp_parm_hdr_t *ph, sctp_parm_hdr_t *oph, 1274 sctp_faddr_t *fp, in6_addr_t *laddr) 1275 { 1276 in6_addr_t addr; 1277 sctp_saddr_ipif_t *sp; 1278 ipaddr_t *addr4; 1279 boolean_t backout = B_FALSE; 1280 uint16_t type; 1281 uint32_t *cid; 1282 1283 /* could be an ASSERT */ 1284 if (laddr != NULL) 1285 IN6_IPADDR_TO_V4MAPPED(0, laddr); 1286 1287 /* If the peer doesn't understand Add-IP, remember it */ 1288 if (ph != NULL && ph->sph_type == htons(PARM_UNRECOGNIZED)) { 1289 sctp->sctp_understands_addip = B_FALSE; 1290 backout = B_TRUE; 1291 } 1292 1293 /* 1294 * If OK, continue with the add / delete action, otherwise 1295 * back out the action. 1296 */ 1297 if (ph != NULL && ph->sph_type != htons(PARM_SUCCESS)) { 1298 backout = B_TRUE; 1299 sctp_error_event(sctp, (sctp_chunk_hdr_t *)ph); 1300 } 1301 1302 type = ntohs(oph->sph_type); 1303 cid = (uint32_t *)(oph + 1); 1304 oph = (sctp_parm_hdr_t *)(cid + 1); 1305 if (oph->sph_type == htons(PARM_ADDR4)) { 1306 addr4 = (ipaddr_t *)(oph + 1); 1307 IN6_IPADDR_TO_V4MAPPED(*addr4, &addr); 1308 } else { 1309 bcopy(oph + 1, &addr, sizeof (addr)); 1310 } 1311 1312 /* Signifies that the address was sucessfully processed */ 1313 if (!backout && laddr != NULL) 1314 *laddr = addr; 1315 1316 sp = sctp_saddr_lookup(sctp, &addr, 0); 1317 ASSERT(sp != NULL); 1318 1319 if (type == PARM_ADD_IP) { 1320 if (backout) { 1321 sctp_del_saddr(sctp, sp); 1322 } else { 1323 sp->saddr_ipif_dontsrc = 0; 1324 } 1325 } else if (type == PARM_DEL_IP) { 1326 if (backout) { 1327 sp->saddr_ipif_delete_pending = 0; 1328 sp->saddr_ipif_dontsrc = 0; 1329 } else { 1330 sctp_del_saddr(sctp, sp); 1331 } 1332 } else { 1333 /* Must be either PARM_ADD_IP or PARM_DEL_IP */ 1334 ASSERT(0); 1335 } 1336 } 1337 1338 /*ARGSUSED*/ 1339 static mblk_t * 1340 sctp_setprim_req(sctp_t *sctp, sctp_parm_hdr_t *ph, uint32_t cid, 1341 sctp_faddr_t *fp, int *cont, int act, in6_addr_t *raddr) 1342 { 1343 mblk_t *mp; 1344 sctp_parm_hdr_t *oph; 1345 sctp_faddr_t *nfp; 1346 in6_addr_t addr; 1347 1348 *cont = 1; 1349 1350 /* Check input */ 1351 if (ntohs(ph->sph_len) < (sizeof (*ph) * 2)) { 1352 mp = sctp_asconf_adderr(SCTP_ERR_BAD_MANDPARM, ph, cid); 1353 if (mp == NULL) { 1354 *cont = -1; 1355 } 1356 return (mp); 1357 } 1358 1359 oph = ph; 1360 ph = (sctp_parm_hdr_t *)((char *)ph + sizeof (sctp_parm_hdr_t) + 1361 sizeof (cid)); 1362 mp = sctp_check_addip_addr(ph, oph, cont, cid, &addr); 1363 if (mp != NULL) { 1364 return (mp); 1365 } 1366 1367 nfp = sctp_lookup_faddr(sctp, &addr); 1368 if (nfp == NULL) { 1369 /* 1370 * Peer is trying to set an address that is not 1371 * part of the association. 1372 */ 1373 dprint(1, ("setprim: addr not here: %x:%x:%x:%x\n", 1374 SCTP_PRINTADDR(addr))); 1375 mp = sctp_asconf_adderr(SCTP_ERR_BAD_MANDPARM, oph, cid); 1376 if (mp == NULL) { 1377 *cont = -1; 1378 } 1379 return (mp); 1380 } 1381 1382 sctp_intf_event(sctp, addr, SCTP_ADDR_MADE_PRIM, 0); 1383 sctp->sctp_primary = nfp; 1384 if (nfp->state != SCTP_FADDRS_ALIVE || nfp == sctp->sctp_current) { 1385 return (NULL); 1386 } 1387 sctp_set_faddr_current(sctp, nfp); 1388 return (NULL); 1389 } 1390 1391 /*ARGSUSED*/ 1392 static void 1393 sctp_setprim_ack(sctp_t *sctp, sctp_parm_hdr_t *ph, sctp_parm_hdr_t *oph, 1394 sctp_faddr_t *fp, in6_addr_t *laddr) 1395 { 1396 if (ph != NULL && ph->sph_type != htons(PARM_SUCCESS)) { 1397 /* If the peer doesn't understand Add-IP, remember it */ 1398 if (ph->sph_type == htons(PARM_UNRECOGNIZED)) { 1399 sctp->sctp_understands_addip = B_FALSE; 1400 } 1401 sctp_error_event(sctp, (sctp_chunk_hdr_t *)ph); 1402 } 1403 1404 /* On success we do nothing */ 1405 } 1406 1407 int 1408 sctp_add_ip(sctp_t *sctp, const void *addrs, uint32_t cnt) 1409 { 1410 struct sockaddr_in *sin4; 1411 struct sockaddr_in6 *sin6; 1412 mblk_t *mp; 1413 int error = 0; 1414 int i; 1415 sctp_addip4_t *ad4; 1416 sctp_addip6_t *ad6; 1417 sctp_asconf_t asc[1]; 1418 uint16_t type = htons(PARM_ADD_IP); 1419 boolean_t v4mapped = B_FALSE; 1420 sctp_cl_ainfo_t *ainfo = NULL; 1421 1422 /* Does the peer understand ASCONF and Add-IP? */ 1423 if (!sctp->sctp_understands_asconf || !sctp->sctp_understands_addip) 1424 return (EOPNOTSUPP); 1425 1426 /* 1427 * On a clustered node, we need to pass this list when 1428 * we get an ASCONF-ACK. We only pre-allocate memory for the 1429 * list, but fill in the addresses when it is processed 1430 * successfully after we get an ASCONF-ACK. 1431 */ 1432 if (cl_sctp_assoc_change != NULL) { 1433 ainfo = kmem_zalloc(sizeof (*ainfo), KM_SLEEP); 1434 /* 1435 * Reserve space for the list of new addresses 1436 */ 1437 ainfo->sctp_cl_asize = sizeof (in6_addr_t) * cnt; 1438 ainfo->sctp_cl_alist = kmem_alloc(ainfo->sctp_cl_asize, 1439 KM_SLEEP); 1440 } 1441 1442 sctp_asconf_init(asc); 1443 1444 /* 1445 * Screen addresses: 1446 * If adding: 1447 * o Must not already be a part of the association 1448 * o Must be AF_INET or AF_INET6 1449 * o XXX Must be valid source address for this node 1450 * o Must be unicast 1451 * o XXX Must fit scoping rules 1452 * If deleting: 1453 * o Must be part of the association 1454 */ 1455 for (i = 0; i < cnt; i++) { 1456 switch (sctp->sctp_family) { 1457 case AF_INET: 1458 sin4 = (struct sockaddr_in *)addrs + i; 1459 v4mapped = B_TRUE; 1460 break; 1461 1462 case AF_INET6: 1463 sin6 = (struct sockaddr_in6 *)addrs + i; 1464 break; 1465 } 1466 1467 if (v4mapped) { 1468 mp = allocb(sizeof (*ad4), BPRI_MED); 1469 if (mp == NULL) { 1470 error = ENOMEM; 1471 goto fail; 1472 } 1473 mp->b_wptr += sizeof (*ad4); 1474 ad4 = (sctp_addip4_t *)mp->b_rptr; 1475 ad4->sad4_addip_ph.sph_type = type; 1476 ad4->sad4_addip_ph.sph_len = 1477 htons(sizeof (sctp_parm_hdr_t) + 1478 PARM_ADDR4_LEN + sizeof (ad4->asconf_req_cid)); 1479 ad4->sad4_addr4_ph.sph_type = htons(PARM_ADDR4); 1480 ad4->sad4_addr4_ph.sph_len = htons(PARM_ADDR4_LEN); 1481 ad4->sad4_addr = sin4->sin_addr.s_addr; 1482 } else { 1483 mp = allocb(sizeof (*ad6), BPRI_MED); 1484 if (mp == NULL) { 1485 error = ENOMEM; 1486 goto fail; 1487 } 1488 mp->b_wptr += sizeof (*ad6); 1489 ad6 = (sctp_addip6_t *)mp->b_rptr; 1490 ad6->sad6_addip_ph.sph_type = type; 1491 ad6->sad6_addip_ph.sph_len = 1492 htons(sizeof (sctp_parm_hdr_t) + 1493 PARM_ADDR6_LEN + sizeof (ad6->asconf_req_cid)); 1494 ad6->sad6_addr6_ph.sph_type = htons(PARM_ADDR6); 1495 ad6->sad6_addr6_ph.sph_len = htons(PARM_ADDR6_LEN); 1496 ad6->sad6_addr = sin6->sin6_addr; 1497 } 1498 error = sctp_asconf_add(asc, mp); 1499 if (error != 0) 1500 goto fail; 1501 } 1502 error = sctp_asconf_send(sctp, asc, sctp->sctp_current, ainfo); 1503 if (error != 0) 1504 goto fail; 1505 1506 return (0); 1507 1508 fail: 1509 if (ainfo != NULL) { 1510 kmem_free(ainfo->sctp_cl_alist, ainfo->sctp_cl_asize); 1511 ainfo->sctp_cl_asize = 0; 1512 kmem_free(ainfo, sizeof (*ainfo)); 1513 } 1514 sctp_asconf_destroy(asc); 1515 return (error); 1516 } 1517 1518 int 1519 sctp_del_ip(sctp_t *sctp, const void *addrs, uint32_t cnt, uchar_t *ulist, 1520 size_t usize) 1521 { 1522 struct sockaddr_in *sin4; 1523 struct sockaddr_in6 *sin6; 1524 mblk_t *mp; 1525 int error = 0; 1526 int i; 1527 int addrcnt = 0; 1528 sctp_addip4_t *ad4; 1529 sctp_addip6_t *ad6; 1530 sctp_asconf_t asc[1]; 1531 sctp_saddr_ipif_t *nsp; 1532 uint16_t type = htons(PARM_DEL_IP); 1533 boolean_t v4mapped = B_FALSE; 1534 in6_addr_t addr; 1535 boolean_t asconf = B_TRUE; 1536 uint_t ifindex; 1537 sctp_cl_ainfo_t *ainfo = NULL; 1538 uchar_t *p = ulist; 1539 boolean_t check_lport = B_FALSE; 1540 sctp_stack_t *sctps = sctp->sctp_sctps; 1541 1542 /* Does the peer understand ASCONF and Add-IP? */ 1543 if (sctp->sctp_state <= SCTPS_LISTEN || !sctps->sctps_addip_enabled || 1544 !sctp->sctp_understands_asconf || !sctp->sctp_understands_addip) { 1545 asconf = B_FALSE; 1546 } 1547 1548 if (sctp->sctp_state > SCTPS_BOUND) 1549 check_lport = B_TRUE; 1550 1551 if (asconf) { 1552 /* 1553 * On a clustered node, we need to pass this list when 1554 * we get an ASCONF-ACK. We only pre-allocate memory for the 1555 * list, but fill in the addresses when it is processed 1556 * successfully after we get an ASCONF-ACK. 1557 */ 1558 if (cl_sctp_assoc_change != NULL) { 1559 ainfo = kmem_alloc(sizeof (*ainfo), KM_SLEEP); 1560 ainfo->sctp_cl_dsize = sizeof (in6_addr_t) * cnt; 1561 ainfo->sctp_cl_dlist = kmem_alloc(ainfo->sctp_cl_dsize, 1562 KM_SLEEP); 1563 } 1564 sctp_asconf_init(asc); 1565 } 1566 /* 1567 * Screen addresses: 1568 * If adding: 1569 * o Must not already be a part of the association 1570 * o Must be AF_INET or AF_INET6 1571 * o XXX Must be valid source address for this node 1572 * o Must be unicast 1573 * o XXX Must fit scoping rules 1574 * If deleting: 1575 * o Must be part of the association 1576 */ 1577 for (i = 0; i < cnt; i++) { 1578 ifindex = 0; 1579 1580 switch (sctp->sctp_family) { 1581 case AF_INET: 1582 sin4 = (struct sockaddr_in *)addrs + i; 1583 if (check_lport && sin4->sin_port != sctp->sctp_lport) { 1584 error = EINVAL; 1585 goto fail; 1586 } 1587 v4mapped = B_TRUE; 1588 IN6_IPADDR_TO_V4MAPPED(sin4->sin_addr.s_addr, &addr); 1589 break; 1590 1591 case AF_INET6: 1592 sin6 = (struct sockaddr_in6 *)addrs + i; 1593 if (check_lport && 1594 sin6->sin6_port != sctp->sctp_lport) { 1595 error = EINVAL; 1596 goto fail; 1597 } 1598 addr = sin6->sin6_addr; 1599 ifindex = sin6->sin6_scope_id; 1600 break; 1601 } 1602 nsp = sctp_saddr_lookup(sctp, &addr, ifindex); 1603 if (nsp == NULL) { 1604 error = EADDRNOTAVAIL; 1605 goto fail; 1606 } 1607 1608 /* Collect the list of addresses, if required */ 1609 if (usize >= sizeof (addr)) { 1610 bcopy(&addr, p, sizeof (addr)); 1611 p += sizeof (addr); 1612 usize -= sizeof (addr); 1613 } 1614 if (!asconf) 1615 continue; 1616 1617 nsp->saddr_ipif_delete_pending = 1; 1618 nsp->saddr_ipif_dontsrc = 1; 1619 addrcnt++; 1620 if (v4mapped) { 1621 mp = allocb(sizeof (*ad4), BPRI_MED); 1622 if (mp == NULL) { 1623 error = ENOMEM; 1624 goto fail; 1625 } 1626 mp->b_wptr += sizeof (*ad4); 1627 ad4 = (sctp_addip4_t *)mp->b_rptr; 1628 ad4->sad4_addip_ph.sph_type = type; 1629 ad4->sad4_addip_ph.sph_len = 1630 htons(sizeof (sctp_parm_hdr_t) + 1631 PARM_ADDR4_LEN + sizeof (ad4->asconf_req_cid)); 1632 ad4->sad4_addr4_ph.sph_type = htons(PARM_ADDR4); 1633 ad4->sad4_addr4_ph.sph_len = htons(PARM_ADDR4_LEN); 1634 ad4->sad4_addr = sin4->sin_addr.s_addr; 1635 } else { 1636 mp = allocb(sizeof (*ad6), BPRI_MED); 1637 if (mp == NULL) { 1638 error = ENOMEM; 1639 goto fail; 1640 } 1641 mp->b_wptr += sizeof (*ad6); 1642 ad6 = (sctp_addip6_t *)mp->b_rptr; 1643 ad6->sad6_addip_ph.sph_type = type; 1644 ad6->sad6_addip_ph.sph_len = 1645 htons(sizeof (sctp_parm_hdr_t) + PARM_ADDR6_LEN + 1646 sizeof (ad6->asconf_req_cid)); 1647 ad6->sad6_addr6_ph.sph_type = htons(PARM_ADDR6); 1648 ad6->sad6_addr6_ph.sph_len = htons(PARM_ADDR6_LEN); 1649 ad6->sad6_addr = addr; 1650 } 1651 1652 error = sctp_asconf_add(asc, mp); 1653 if (error != 0) 1654 goto fail; 1655 } 1656 1657 if (!asconf) { 1658 sctp_del_saddr_list(sctp, addrs, cnt, B_FALSE); 1659 return (0); 1660 } 1661 error = sctp_asconf_send(sctp, asc, sctp->sctp_current, ainfo); 1662 if (error != 0) 1663 goto fail; 1664 sctp_redo_faddr_srcs(sctp); 1665 return (0); 1666 1667 fail: 1668 if (ainfo != NULL) { 1669 kmem_free(ainfo->sctp_cl_dlist, ainfo->sctp_cl_dsize); 1670 ainfo->sctp_cl_dsize = 0; 1671 kmem_free(ainfo, sizeof (*ainfo)); 1672 } 1673 if (!asconf) 1674 return (error); 1675 for (i = 0; i < addrcnt; i++) { 1676 ifindex = 0; 1677 1678 switch (sctp->sctp_family) { 1679 case AF_INET: 1680 sin4 = (struct sockaddr_in *)addrs + i; 1681 IN6_INADDR_TO_V4MAPPED(&(sin4->sin_addr), &addr); 1682 break; 1683 case AF_INET6: 1684 sin6 = (struct sockaddr_in6 *)addrs + i; 1685 addr = sin6->sin6_addr; 1686 ifindex = sin6->sin6_scope_id; 1687 break; 1688 } 1689 nsp = sctp_saddr_lookup(sctp, &addr, ifindex); 1690 ASSERT(nsp != NULL); 1691 nsp->saddr_ipif_delete_pending = 0; 1692 nsp->saddr_ipif_dontsrc = 0; 1693 } 1694 sctp_asconf_destroy(asc); 1695 1696 return (error); 1697 } 1698 1699 int 1700 sctp_set_peerprim(sctp_t *sctp, const void *inp, uint_t inlen) 1701 { 1702 const struct sctp_setprim *prim = inp; 1703 const struct sockaddr_storage *ss; 1704 struct sockaddr_in *sin; 1705 struct sockaddr_in6 *sin6; 1706 in6_addr_t addr; 1707 mblk_t *mp; 1708 sctp_saddr_ipif_t *sp; 1709 sctp_addip4_t *ad4; 1710 sctp_addip6_t *ad6; 1711 sctp_asconf_t asc[1]; 1712 int error = 0; 1713 uint_t ifindex = 0; 1714 1715 /* Does the peer understand ASCONF and Add-IP? */ 1716 if (!sctp->sctp_understands_asconf || !sctp->sctp_understands_addip) { 1717 return (EOPNOTSUPP); 1718 } 1719 1720 if (inlen < sizeof (*prim)) 1721 return (EINVAL); 1722 1723 /* Don't do anything if we are not connected */ 1724 if (sctp->sctp_state != SCTPS_ESTABLISHED) 1725 return (EINVAL); 1726 1727 ss = &prim->ssp_addr; 1728 sin = NULL; 1729 sin6 = NULL; 1730 if (ss->ss_family == AF_INET) { 1731 sin = (struct sockaddr_in *)ss; 1732 IN6_IPADDR_TO_V4MAPPED(sin->sin_addr.s_addr, &addr); 1733 } else if (ss->ss_family == AF_INET6) { 1734 sin6 = (struct sockaddr_in6 *)ss; 1735 addr = sin6->sin6_addr; 1736 ifindex = sin6->sin6_scope_id; 1737 } else { 1738 return (EAFNOSUPPORT); 1739 } 1740 sp = sctp_saddr_lookup(sctp, &addr, ifindex); 1741 if (sp == NULL) 1742 return (EADDRNOTAVAIL); 1743 sctp_asconf_init(asc); 1744 if (sin) { 1745 mp = allocb(sizeof (*ad4), BPRI_MED); 1746 if (mp == NULL) { 1747 error = ENOMEM; 1748 goto fail; 1749 } 1750 mp->b_wptr += sizeof (*ad4); 1751 ad4 = (sctp_addip4_t *)mp->b_rptr; 1752 ad4->sad4_addip_ph.sph_type = htons(PARM_SET_PRIMARY); 1753 ad4->sad4_addip_ph.sph_len = htons(sizeof (sctp_parm_hdr_t) + 1754 PARM_ADDR4_LEN + sizeof (ad4->asconf_req_cid)); 1755 ad4->sad4_addr4_ph.sph_type = htons(PARM_ADDR4); 1756 ad4->sad4_addr4_ph.sph_len = htons(PARM_ADDR4_LEN); 1757 ad4->sad4_addr = sin->sin_addr.s_addr; 1758 } else { 1759 mp = allocb(sizeof (*ad6), BPRI_MED); 1760 if (mp == NULL) { 1761 error = ENOMEM; 1762 goto fail; 1763 } 1764 mp->b_wptr += sizeof (*ad6); 1765 ad6 = (sctp_addip6_t *)mp->b_rptr; 1766 ad6->sad6_addip_ph.sph_type = htons(PARM_SET_PRIMARY); 1767 ad6->sad6_addip_ph.sph_len = htons(sizeof (sctp_parm_hdr_t) + 1768 PARM_ADDR6_LEN + sizeof (ad6->asconf_req_cid)); 1769 ad6->sad6_addr6_ph.sph_type = htons(PARM_ADDR6); 1770 ad6->sad6_addr6_ph.sph_len = htons(PARM_ADDR6_LEN); 1771 ad6->sad6_addr = sin6->sin6_addr; 1772 } 1773 1774 error = sctp_asconf_add(asc, mp); 1775 if (error != 0) { 1776 goto fail; 1777 } 1778 1779 error = sctp_asconf_send(sctp, asc, sctp->sctp_current, NULL); 1780 if (error == 0) { 1781 return (0); 1782 } 1783 1784 fail: 1785 sctp_asconf_destroy(asc); 1786 return (error); 1787 } 1788