1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <sys/proc.h> 40 #include <netinet/sctp_var.h> 41 #include <netinet/sctp_sysctl.h> 42 #include <netinet/sctp_pcb.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp.h> 45 #include <netinet/sctp_header.h> 46 #include <netinet/sctp_asconf.h> 47 #include <netinet/sctp_output.h> 48 #include <netinet/sctp_timer.h> 49 #include <netinet/sctp_bsd_addr.h> 50 #if defined(INET) || defined(INET6) 51 #include <netinet/udp.h> 52 #endif 53 #ifdef INET6 54 #include <netinet6/ip6_var.h> 55 #endif 56 #include <sys/sched.h> 57 #include <sys/smp.h> 58 #include <sys/unistd.h> 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 #endif 79 80 void 81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 82 { 83 /* 84 * We really don't need to lock this, but I will just because it 85 * does not hurt. 86 */ 87 SCTP_INP_INFO_RLOCK(); 88 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 89 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 90 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 91 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 92 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 93 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 94 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 95 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 96 SCTP_INP_INFO_RUNLOCK(); 97 } 98 99 /*- 100 * Addresses are added to VRF's (Virtual Router's). For BSD we 101 * have only the default VRF 0. We maintain a hash list of 102 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 103 * these has a list of addresses. When we add a new address 104 * to a VRF we lookup the ifn/ifn_index, if the ifn does 105 * not exist we create it and add it to the list of IFN's 106 * within the VRF. Once we have the sctp_ifn, we add the 107 * address to the list. So we look something like: 108 * 109 * hash-vrf-table 110 * vrf-> ifn-> ifn -> ifn 111 * vrf | 112 * ... +--ifa-> ifa -> ifa 113 * vrf 114 * 115 * We keep these separate lists since the SCTP subsystem will 116 * point to these from its source address selection nets structure. 117 * When an address is deleted it does not happen right away on 118 * the SCTP side, it gets scheduled. What we do when a 119 * delete happens is immediately remove the address from 120 * the master list and decrement the refcount. As our 121 * addip iterator works through and frees the src address 122 * selection pointing to the sctp_ifa, eventually the refcount 123 * will reach 0 and we will delete it. Note that it is assumed 124 * that any locking on system level ifn/ifa is done at the 125 * caller of these functions and these routines will only 126 * lock the SCTP structures as they add or delete things. 127 * 128 * Other notes on VRF concepts. 129 * - An endpoint can be in multiple VRF's 130 * - An association lives within a VRF and only one VRF. 131 * - Any incoming packet we can deduce the VRF for by 132 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 133 * - Any downward send call or connect call must supply the 134 * VRF via ancillary data or via some sort of set default 135 * VRF socket option call (again for BSD no brainer since 136 * the VRF is always 0). 137 * - An endpoint may add multiple VRF's to it. 138 * - Listening sockets can accept associations in any 139 * of the VRF's they are in but the assoc will end up 140 * in only one VRF (gotten from the packet or connect/send). 141 * 142 */ 143 144 struct sctp_vrf * 145 sctp_allocate_vrf(int vrf_id) 146 { 147 struct sctp_vrf *vrf = NULL; 148 struct sctp_vrflist *bucket; 149 150 /* First allocate the VRF structure */ 151 vrf = sctp_find_vrf(vrf_id); 152 if (vrf) { 153 /* Already allocated */ 154 return (vrf); 155 } 156 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 157 SCTP_M_VRF); 158 if (vrf == NULL) { 159 /* No memory */ 160 #ifdef INVARIANTS 161 panic("No memory for VRF:%d", vrf_id); 162 #endif 163 return (NULL); 164 } 165 /* setup the VRF */ 166 memset(vrf, 0, sizeof(struct sctp_vrf)); 167 vrf->vrf_id = vrf_id; 168 LIST_INIT(&vrf->ifnlist); 169 vrf->total_ifa_count = 0; 170 vrf->refcount = 0; 171 /* now also setup table ids */ 172 SCTP_INIT_VRF_TABLEID(vrf); 173 /* Init the HASH of addresses */ 174 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 175 &vrf->vrf_addr_hashmark); 176 if (vrf->vrf_addr_hash == NULL) { 177 /* No memory */ 178 #ifdef INVARIANTS 179 panic("No memory for VRF:%d", vrf_id); 180 #endif 181 SCTP_FREE(vrf, SCTP_M_VRF); 182 return (NULL); 183 } 184 185 /* Add it to the hash table */ 186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 187 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 189 return (vrf); 190 } 191 192 193 struct sctp_ifn * 194 sctp_find_ifn(void *ifn, uint32_t ifn_index) 195 { 196 struct sctp_ifn *sctp_ifnp; 197 struct sctp_ifnlist *hash_ifn_head; 198 199 /* 200 * We assume the lock is held for the addresses if that's wrong 201 * problems could occur :-) 202 */ 203 SCTP_IPI_ADDR_LOCK_ASSERT(); 204 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 205 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 206 if (sctp_ifnp->ifn_index == ifn_index) { 207 return (sctp_ifnp); 208 } 209 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 210 return (sctp_ifnp); 211 } 212 } 213 return (NULL); 214 } 215 216 217 struct sctp_vrf * 218 sctp_find_vrf(uint32_t vrf_id) 219 { 220 struct sctp_vrflist *bucket; 221 struct sctp_vrf *liste; 222 223 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 224 LIST_FOREACH(liste, bucket, next_vrf) { 225 if (vrf_id == liste->vrf_id) { 226 return (liste); 227 } 228 } 229 return (NULL); 230 } 231 232 233 void 234 sctp_free_vrf(struct sctp_vrf *vrf) 235 { 236 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 237 if (vrf->vrf_addr_hash) { 238 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 239 vrf->vrf_addr_hash = NULL; 240 } 241 /* We zero'd the count */ 242 LIST_REMOVE(vrf, next_vrf); 243 SCTP_FREE(vrf, SCTP_M_VRF); 244 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 245 } 246 } 247 248 249 void 250 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 251 { 252 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 253 /* We zero'd the count */ 254 if (sctp_ifnp->vrf) { 255 sctp_free_vrf(sctp_ifnp->vrf); 256 } 257 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 258 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 259 } 260 } 261 262 263 void 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 265 { 266 struct sctp_ifn *sctp_ifnp; 267 268 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 269 if (sctp_ifnp != NULL) { 270 sctp_ifnp->ifn_mtu = mtu; 271 } 272 } 273 274 275 void 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 277 { 278 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 279 /* We zero'd the count */ 280 if (sctp_ifap->ifn_p) { 281 sctp_free_ifn(sctp_ifap->ifn_p); 282 } 283 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 284 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 285 } 286 } 287 288 289 static void 290 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 291 { 292 struct sctp_ifn *found; 293 294 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 295 if (found == NULL) { 296 /* Not in the list.. sorry */ 297 return; 298 } 299 if (hold_addr_lock == 0) { 300 SCTP_IPI_ADDR_WLOCK(); 301 } else { 302 SCTP_IPI_ADDR_WLOCK_ASSERT(); 303 } 304 LIST_REMOVE(sctp_ifnp, next_bucket); 305 LIST_REMOVE(sctp_ifnp, next_ifn); 306 if (hold_addr_lock == 0) { 307 SCTP_IPI_ADDR_WUNLOCK(); 308 } 309 /* Take away the reference, and possibly free it */ 310 sctp_free_ifn(sctp_ifnp); 311 } 312 313 314 void 315 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 316 const char *if_name, uint32_t ifn_index) 317 { 318 struct sctp_vrf *vrf; 319 struct sctp_ifa *sctp_ifap; 320 321 SCTP_IPI_ADDR_RLOCK(); 322 vrf = sctp_find_vrf(vrf_id); 323 if (vrf == NULL) { 324 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 325 goto out; 326 327 } 328 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 329 if (sctp_ifap == NULL) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 331 goto out; 332 } 333 if (sctp_ifap->ifn_p == NULL) { 334 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 335 goto out; 336 } 337 if (if_name) { 338 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 340 sctp_ifap->ifn_p->ifn_name, if_name); 341 goto out; 342 } 343 } else { 344 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 345 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 346 sctp_ifap->ifn_p->ifn_index, ifn_index); 347 goto out; 348 } 349 } 350 351 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 352 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 353 out: 354 SCTP_IPI_ADDR_RUNLOCK(); 355 } 356 357 358 void 359 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 360 const char *if_name, uint32_t ifn_index) 361 { 362 struct sctp_vrf *vrf; 363 struct sctp_ifa *sctp_ifap; 364 365 SCTP_IPI_ADDR_RLOCK(); 366 vrf = sctp_find_vrf(vrf_id); 367 if (vrf == NULL) { 368 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 369 goto out; 370 371 } 372 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 373 if (sctp_ifap == NULL) { 374 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 375 goto out; 376 } 377 if (sctp_ifap->ifn_p == NULL) { 378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 379 goto out; 380 } 381 if (if_name) { 382 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 383 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 384 sctp_ifap->ifn_p->ifn_name, if_name); 385 goto out; 386 } 387 } else { 388 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 389 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 390 sctp_ifap->ifn_p->ifn_index, ifn_index); 391 goto out; 392 } 393 } 394 395 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 396 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 397 out: 398 SCTP_IPI_ADDR_RUNLOCK(); 399 } 400 401 402 /*- 403 * Add an ifa to an ifn. 404 * Register the interface as necessary. 405 * NOTE: ADDR write lock MUST be held. 406 */ 407 static void 408 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 409 { 410 int ifa_af; 411 412 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 413 sctp_ifap->ifn_p = sctp_ifnp; 414 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 415 /* update address counts */ 416 sctp_ifnp->ifa_count++; 417 ifa_af = sctp_ifap->address.sa.sa_family; 418 switch (ifa_af) { 419 #ifdef INET 420 case AF_INET: 421 sctp_ifnp->num_v4++; 422 break; 423 #endif 424 #ifdef INET6 425 case AF_INET6: 426 sctp_ifnp->num_v6++; 427 break; 428 #endif 429 default: 430 break; 431 } 432 if (sctp_ifnp->ifa_count == 1) { 433 /* register the new interface */ 434 sctp_ifnp->registered_af = ifa_af; 435 } 436 } 437 438 439 /*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445 static void 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447 { 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453 #ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457 #endif 458 #ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462 #endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 sctp_ifap->ifn_p->registered_af = AF_INET; 475 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 476 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 477 sctp_ifap->ifn_p->registered_af = AF_INET6; 478 } 479 /* free the ifn refcount */ 480 sctp_free_ifn(sctp_ifap->ifn_p); 481 } 482 sctp_ifap->ifn_p = NULL; 483 } 484 } 485 486 487 struct sctp_ifa * 488 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 489 uint32_t ifn_type, const char *if_name, void *ifa, 490 struct sockaddr *addr, uint32_t ifa_flags, 491 int dynamic_add) 492 { 493 struct sctp_vrf *vrf; 494 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp; 495 struct sctp_ifa *sctp_ifap, *new_sctp_ifap; 496 struct sctp_ifalist *hash_addr_head; 497 struct sctp_ifnlist *hash_ifn_head; 498 uint32_t hash_of_addr; 499 int new_ifn_af = 0; 500 501 #ifdef SCTP_DEBUG 502 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 503 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 504 #endif 505 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *, 506 sizeof(struct sctp_ifn), SCTP_M_IFN); 507 if (new_sctp_ifnp == NULL) { 508 #ifdef INVARIANTS 509 panic("No memory for IFN"); 510 #endif 511 return (NULL); 512 } 513 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 514 if (new_sctp_ifap == NULL) { 515 #ifdef INVARIANTS 516 panic("No memory for IFA"); 517 #endif 518 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 519 return (NULL); 520 } 521 522 SCTP_IPI_ADDR_WLOCK(); 523 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 524 if (sctp_ifnp) { 525 vrf = sctp_ifnp->vrf; 526 } else { 527 vrf = sctp_find_vrf(vrf_id); 528 if (vrf == NULL) { 529 vrf = sctp_allocate_vrf(vrf_id); 530 if (vrf == NULL) { 531 SCTP_IPI_ADDR_WUNLOCK(); 532 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 533 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 534 return (NULL); 535 } 536 } 537 } 538 if (sctp_ifnp == NULL) { 539 /* 540 * build one and add it, can't hold lock until after malloc 541 * done though. 542 */ 543 sctp_ifnp = new_sctp_ifnp; 544 new_sctp_ifnp = NULL; 545 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 546 sctp_ifnp->ifn_index = ifn_index; 547 sctp_ifnp->ifn_p = ifn; 548 sctp_ifnp->ifn_type = ifn_type; 549 sctp_ifnp->refcount = 0; 550 sctp_ifnp->vrf = vrf; 551 atomic_add_int(&vrf->refcount, 1); 552 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 553 if (if_name != NULL) { 554 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 555 } else { 556 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 557 } 558 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 559 LIST_INIT(&sctp_ifnp->ifalist); 560 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 561 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 562 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 563 new_ifn_af = 1; 564 } 565 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 566 if (sctp_ifap) { 567 /* Hmm, it already exists? */ 568 if ((sctp_ifap->ifn_p) && 569 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 570 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 571 sctp_ifap->ifn_p->ifn_name, ifn_index, 572 (void *)sctp_ifap); 573 if (new_ifn_af) { 574 /* Remove the created one that we don't want */ 575 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 576 } 577 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 578 /* easy to solve, just switch back to active */ 579 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 580 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 581 sctp_ifap->ifn_p = sctp_ifnp; 582 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 583 } 584 exit_stage_left: 585 SCTP_IPI_ADDR_WUNLOCK(); 586 if (new_sctp_ifnp != NULL) { 587 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 588 } 589 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 590 return (sctp_ifap); 591 } else { 592 if (sctp_ifap->ifn_p) { 593 /* 594 * The last IFN gets the address, remove the 595 * old one 596 */ 597 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 598 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 599 sctp_ifap->ifn_p->ifn_index, if_name, 600 ifn_index); 601 /* remove the address from the old ifn */ 602 sctp_remove_ifa_from_ifn(sctp_ifap); 603 /* move the address over to the new ifn */ 604 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 605 goto exit_stage_left; 606 } else { 607 /* repair ifnp which was NULL ? */ 608 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 609 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 610 (void *)sctp_ifnp, (void *)sctp_ifap); 611 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 612 } 613 goto exit_stage_left; 614 } 615 } 616 sctp_ifap = new_sctp_ifap; 617 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 618 sctp_ifap->ifn_p = sctp_ifnp; 619 atomic_add_int(&sctp_ifnp->refcount, 1); 620 sctp_ifap->vrf_id = vrf_id; 621 sctp_ifap->ifa = ifa; 622 memcpy(&sctp_ifap->address, addr, addr->sa_len); 623 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 624 sctp_ifap->flags = ifa_flags; 625 /* Set scope */ 626 switch (sctp_ifap->address.sa.sa_family) { 627 #ifdef INET 628 case AF_INET: 629 { 630 struct sockaddr_in *sin; 631 632 sin = &sctp_ifap->address.sin; 633 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 634 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 635 sctp_ifap->src_is_loop = 1; 636 } 637 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 638 sctp_ifap->src_is_priv = 1; 639 } 640 sctp_ifnp->num_v4++; 641 if (new_ifn_af) 642 new_ifn_af = AF_INET; 643 break; 644 } 645 #endif 646 #ifdef INET6 647 case AF_INET6: 648 { 649 /* ok to use deprecated addresses? */ 650 struct sockaddr_in6 *sin6; 651 652 sin6 = &sctp_ifap->address.sin6; 653 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 654 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 655 sctp_ifap->src_is_loop = 1; 656 } 657 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 658 sctp_ifap->src_is_priv = 1; 659 } 660 sctp_ifnp->num_v6++; 661 if (new_ifn_af) 662 new_ifn_af = AF_INET6; 663 break; 664 } 665 #endif 666 default: 667 new_ifn_af = 0; 668 break; 669 } 670 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 671 672 if ((sctp_ifap->src_is_priv == 0) && 673 (sctp_ifap->src_is_loop == 0)) { 674 sctp_ifap->src_is_glob = 1; 675 } 676 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 677 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 678 sctp_ifap->refcount = 1; 679 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 680 sctp_ifnp->ifa_count++; 681 vrf->total_ifa_count++; 682 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 683 if (new_ifn_af) { 684 sctp_ifnp->registered_af = new_ifn_af; 685 } 686 SCTP_IPI_ADDR_WUNLOCK(); 687 if (new_sctp_ifnp != NULL) { 688 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 689 } 690 691 if (dynamic_add) { 692 /* 693 * Bump up the refcount so that when the timer completes it 694 * will drop back down. 695 */ 696 struct sctp_laddr *wi; 697 698 atomic_add_int(&sctp_ifap->refcount, 1); 699 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 700 if (wi == NULL) { 701 /* 702 * Gak, what can we do? We have lost an address 703 * change can you say HOSED? 704 */ 705 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 706 /* Opps, must decrement the count */ 707 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 708 if_name); 709 return (NULL); 710 } 711 SCTP_INCR_LADDR_COUNT(); 712 memset(wi, 0, sizeof(*wi)); 713 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 714 wi->ifa = sctp_ifap; 715 wi->action = SCTP_ADD_IP_ADDRESS; 716 717 SCTP_WQ_ADDR_LOCK(); 718 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 719 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 720 (struct sctp_inpcb *)NULL, 721 (struct sctp_tcb *)NULL, 722 (struct sctp_nets *)NULL); 723 SCTP_WQ_ADDR_UNLOCK(); 724 } else { 725 /* it's ready for use */ 726 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 727 } 728 return (sctp_ifap); 729 } 730 731 void 732 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 733 uint32_t ifn_index, const char *if_name) 734 { 735 struct sctp_vrf *vrf; 736 struct sctp_ifa *sctp_ifap = NULL; 737 738 SCTP_IPI_ADDR_WLOCK(); 739 vrf = sctp_find_vrf(vrf_id); 740 if (vrf == NULL) { 741 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 742 goto out_now; 743 } 744 745 #ifdef SCTP_DEBUG 746 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 747 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 748 #endif 749 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 750 if (sctp_ifap) { 751 /* Validate the delete */ 752 if (sctp_ifap->ifn_p) { 753 int valid = 0; 754 755 /*- 756 * The name has priority over the ifn_index 757 * if its given. 758 */ 759 if (if_name) { 760 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 761 /* They match its a correct delete */ 762 valid = 1; 763 } 764 } 765 if (!valid) { 766 /* last ditch check ifn_index */ 767 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 768 valid = 1; 769 } 770 } 771 if (!valid) { 772 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 773 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 774 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 775 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 776 SCTP_IPI_ADDR_WUNLOCK(); 777 return; 778 } 779 } 780 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 781 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 782 /* 783 * We don't set the flag. This means that the structure will 784 * hang around in EP's that have bound specific to it until 785 * they close. This gives us TCP like behavior if someone 786 * removes an address (or for that matter adds it right 787 * back). 788 */ 789 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 790 vrf->total_ifa_count--; 791 LIST_REMOVE(sctp_ifap, next_bucket); 792 sctp_remove_ifa_from_ifn(sctp_ifap); 793 } 794 #ifdef SCTP_DEBUG 795 else { 796 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 797 ifn_index); 798 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 799 } 800 #endif 801 802 out_now: 803 SCTP_IPI_ADDR_WUNLOCK(); 804 if (sctp_ifap) { 805 struct sctp_laddr *wi; 806 807 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 808 if (wi == NULL) { 809 /* 810 * Gak, what can we do? We have lost an address 811 * change can you say HOSED? 812 */ 813 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 814 815 /* Oops, must decrement the count */ 816 sctp_free_ifa(sctp_ifap); 817 return; 818 } 819 SCTP_INCR_LADDR_COUNT(); 820 memset(wi, 0, sizeof(*wi)); 821 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 822 wi->ifa = sctp_ifap; 823 wi->action = SCTP_DEL_IP_ADDRESS; 824 SCTP_WQ_ADDR_LOCK(); 825 /* 826 * Should this really be a tailq? As it is we will process 827 * the newest first :-0 828 */ 829 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 830 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 831 (struct sctp_inpcb *)NULL, 832 (struct sctp_tcb *)NULL, 833 (struct sctp_nets *)NULL); 834 SCTP_WQ_ADDR_UNLOCK(); 835 } 836 return; 837 } 838 839 840 static int 841 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 842 { 843 int loopback_scope; 844 #if defined(INET) 845 int ipv4_local_scope, ipv4_addr_legal; 846 #endif 847 #if defined(INET6) 848 int local_scope, site_scope, ipv6_addr_legal; 849 #endif 850 struct sctp_vrf *vrf; 851 struct sctp_ifn *sctp_ifn; 852 struct sctp_ifa *sctp_ifa; 853 854 loopback_scope = stcb->asoc.scope.loopback_scope; 855 #if defined(INET) 856 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 857 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 858 #endif 859 #if defined(INET6) 860 local_scope = stcb->asoc.scope.local_scope; 861 site_scope = stcb->asoc.scope.site_scope; 862 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 863 #endif 864 865 SCTP_IPI_ADDR_RLOCK(); 866 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 867 if (vrf == NULL) { 868 /* no vrf, no addresses */ 869 SCTP_IPI_ADDR_RUNLOCK(); 870 return (0); 871 } 872 873 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 874 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 875 if ((loopback_scope == 0) && 876 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 877 continue; 878 } 879 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 880 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 881 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 882 /* 883 * We allow pending addresses, where 884 * we have sent an asconf-add to be 885 * considered valid. 886 */ 887 continue; 888 } 889 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 890 continue; 891 } 892 switch (sctp_ifa->address.sa.sa_family) { 893 #ifdef INET 894 case AF_INET: 895 if (ipv4_addr_legal) { 896 struct sockaddr_in *sin, 897 *rsin; 898 899 sin = &sctp_ifa->address.sin; 900 rsin = (struct sockaddr_in *)to; 901 if ((ipv4_local_scope == 0) && 902 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 903 continue; 904 } 905 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 906 &sin->sin_addr) != 0) { 907 continue; 908 } 909 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 910 SCTP_IPI_ADDR_RUNLOCK(); 911 return (1); 912 } 913 } 914 break; 915 #endif 916 #ifdef INET6 917 case AF_INET6: 918 if (ipv6_addr_legal) { 919 struct sockaddr_in6 *sin6, 920 *rsin6; 921 922 sin6 = &sctp_ifa->address.sin6; 923 rsin6 = (struct sockaddr_in6 *)to; 924 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 925 &sin6->sin6_addr) != 0) { 926 continue; 927 } 928 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 929 if (local_scope == 0) 930 continue; 931 if (sin6->sin6_scope_id == 0) { 932 if (sa6_recoverscope(sin6) != 0) 933 continue; 934 } 935 } 936 if ((site_scope == 0) && 937 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 938 continue; 939 } 940 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 941 SCTP_IPI_ADDR_RUNLOCK(); 942 return (1); 943 } 944 } 945 break; 946 #endif 947 default: 948 /* TSNH */ 949 break; 950 } 951 } 952 } 953 } else { 954 struct sctp_laddr *laddr; 955 956 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 957 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 958 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 959 continue; 960 } 961 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 962 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 963 /* 964 * We allow pending addresses, where we have 965 * sent an asconf-add to be considered 966 * valid. 967 */ 968 continue; 969 } 970 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 971 continue; 972 } 973 switch (to->sa_family) { 974 #ifdef INET 975 case AF_INET: 976 { 977 struct sockaddr_in *sin, *rsin; 978 979 sin = &laddr->ifa->address.sin; 980 rsin = (struct sockaddr_in *)to; 981 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 982 SCTP_IPI_ADDR_RUNLOCK(); 983 return (1); 984 } 985 break; 986 } 987 #endif 988 #ifdef INET6 989 case AF_INET6: 990 { 991 struct sockaddr_in6 *sin6, *rsin6; 992 993 sin6 = &laddr->ifa->address.sin6; 994 rsin6 = (struct sockaddr_in6 *)to; 995 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 996 SCTP_IPI_ADDR_RUNLOCK(); 997 return (1); 998 } 999 break; 1000 } 1001 1002 #endif 1003 default: 1004 /* TSNH */ 1005 break; 1006 } 1007 1008 } 1009 } 1010 SCTP_IPI_ADDR_RUNLOCK(); 1011 return (0); 1012 } 1013 1014 1015 static struct sctp_tcb * 1016 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1017 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1018 { 1019 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1020 /* 1021 * If we support the TCP model, then we must now dig through to see 1022 * if we can find our endpoint in the list of tcp ep's. 1023 */ 1024 uint16_t lport, rport; 1025 struct sctppcbhead *ephead; 1026 struct sctp_inpcb *inp; 1027 struct sctp_laddr *laddr; 1028 struct sctp_tcb *stcb; 1029 struct sctp_nets *net; 1030 1031 if ((to == NULL) || (from == NULL)) { 1032 return (NULL); 1033 } 1034 1035 switch (to->sa_family) { 1036 #ifdef INET 1037 case AF_INET: 1038 if (from->sa_family == AF_INET) { 1039 lport = ((struct sockaddr_in *)to)->sin_port; 1040 rport = ((struct sockaddr_in *)from)->sin_port; 1041 } else { 1042 return (NULL); 1043 } 1044 break; 1045 #endif 1046 #ifdef INET6 1047 case AF_INET6: 1048 if (from->sa_family == AF_INET6) { 1049 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1050 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1051 } else { 1052 return (NULL); 1053 } 1054 break; 1055 #endif 1056 default: 1057 return (NULL); 1058 } 1059 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1060 /* 1061 * Ok now for each of the guys in this bucket we must look and see: 1062 * - Does the remote port match. - Does there single association's 1063 * addresses match this address (to). If so we update p_ep to point 1064 * to this ep and return the tcb from it. 1065 */ 1066 LIST_FOREACH(inp, ephead, sctp_hash) { 1067 SCTP_INP_RLOCK(inp); 1068 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1069 SCTP_INP_RUNLOCK(inp); 1070 continue; 1071 } 1072 if (lport != inp->sctp_lport) { 1073 SCTP_INP_RUNLOCK(inp); 1074 continue; 1075 } 1076 switch (to->sa_family) { 1077 #ifdef INET 1078 case AF_INET: 1079 { 1080 struct sockaddr_in *sin; 1081 1082 sin = (struct sockaddr_in *)to; 1083 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1084 &sin->sin_addr) != 0) { 1085 SCTP_INP_RUNLOCK(inp); 1086 continue; 1087 } 1088 break; 1089 } 1090 #endif 1091 #ifdef INET6 1092 case AF_INET6: 1093 { 1094 struct sockaddr_in6 *sin6; 1095 1096 sin6 = (struct sockaddr_in6 *)to; 1097 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1098 &sin6->sin6_addr) != 0) { 1099 SCTP_INP_RUNLOCK(inp); 1100 continue; 1101 } 1102 break; 1103 } 1104 #endif 1105 default: 1106 SCTP_INP_RUNLOCK(inp); 1107 continue; 1108 } 1109 if (inp->def_vrf_id != vrf_id) { 1110 SCTP_INP_RUNLOCK(inp); 1111 continue; 1112 } 1113 /* check to see if the ep has one of the addresses */ 1114 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1115 /* We are NOT bound all, so look further */ 1116 int match = 0; 1117 1118 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1119 1120 if (laddr->ifa == NULL) { 1121 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1122 continue; 1123 } 1124 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1125 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1126 continue; 1127 } 1128 if (laddr->ifa->address.sa.sa_family == 1129 to->sa_family) { 1130 /* see if it matches */ 1131 #ifdef INET 1132 if (from->sa_family == AF_INET) { 1133 struct sockaddr_in *intf_addr, 1134 *sin; 1135 1136 intf_addr = &laddr->ifa->address.sin; 1137 sin = (struct sockaddr_in *)to; 1138 if (sin->sin_addr.s_addr == 1139 intf_addr->sin_addr.s_addr) { 1140 match = 1; 1141 break; 1142 } 1143 } 1144 #endif 1145 #ifdef INET6 1146 if (from->sa_family == AF_INET6) { 1147 struct sockaddr_in6 *intf_addr6; 1148 struct sockaddr_in6 *sin6; 1149 1150 sin6 = (struct sockaddr_in6 *) 1151 to; 1152 intf_addr6 = &laddr->ifa->address.sin6; 1153 1154 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1155 intf_addr6)) { 1156 match = 1; 1157 break; 1158 } 1159 } 1160 #endif 1161 } 1162 } 1163 if (match == 0) { 1164 /* This endpoint does not have this address */ 1165 SCTP_INP_RUNLOCK(inp); 1166 continue; 1167 } 1168 } 1169 /* 1170 * Ok if we hit here the ep has the address, does it hold 1171 * the tcb? 1172 */ 1173 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1174 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1175 if (stcb == NULL) { 1176 SCTP_INP_RUNLOCK(inp); 1177 continue; 1178 } 1179 SCTP_TCB_LOCK(stcb); 1180 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1181 SCTP_TCB_UNLOCK(stcb); 1182 SCTP_INP_RUNLOCK(inp); 1183 continue; 1184 } 1185 if (stcb->rport != rport) { 1186 /* remote port does not match. */ 1187 SCTP_TCB_UNLOCK(stcb); 1188 SCTP_INP_RUNLOCK(inp); 1189 continue; 1190 } 1191 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1192 SCTP_TCB_UNLOCK(stcb); 1193 SCTP_INP_RUNLOCK(inp); 1194 continue; 1195 } 1196 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1197 SCTP_TCB_UNLOCK(stcb); 1198 SCTP_INP_RUNLOCK(inp); 1199 continue; 1200 } 1201 /* Does this TCB have a matching address? */ 1202 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1203 1204 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1205 /* not the same family, can't be a match */ 1206 continue; 1207 } 1208 switch (from->sa_family) { 1209 #ifdef INET 1210 case AF_INET: 1211 { 1212 struct sockaddr_in *sin, *rsin; 1213 1214 sin = (struct sockaddr_in *)&net->ro._l_addr; 1215 rsin = (struct sockaddr_in *)from; 1216 if (sin->sin_addr.s_addr == 1217 rsin->sin_addr.s_addr) { 1218 /* found it */ 1219 if (netp != NULL) { 1220 *netp = net; 1221 } 1222 /* 1223 * Update the endpoint 1224 * pointer 1225 */ 1226 *inp_p = inp; 1227 SCTP_INP_RUNLOCK(inp); 1228 return (stcb); 1229 } 1230 break; 1231 } 1232 #endif 1233 #ifdef INET6 1234 case AF_INET6: 1235 { 1236 struct sockaddr_in6 *sin6, *rsin6; 1237 1238 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1239 rsin6 = (struct sockaddr_in6 *)from; 1240 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1241 rsin6)) { 1242 /* found it */ 1243 if (netp != NULL) { 1244 *netp = net; 1245 } 1246 /* 1247 * Update the endpoint 1248 * pointer 1249 */ 1250 *inp_p = inp; 1251 SCTP_INP_RUNLOCK(inp); 1252 return (stcb); 1253 } 1254 break; 1255 } 1256 #endif 1257 default: 1258 /* TSNH */ 1259 break; 1260 } 1261 } 1262 SCTP_TCB_UNLOCK(stcb); 1263 SCTP_INP_RUNLOCK(inp); 1264 } 1265 return (NULL); 1266 } 1267 1268 1269 /* 1270 * rules for use 1271 * 1272 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1273 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1274 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1275 * NULL. 1276 */ 1277 1278 struct sctp_tcb * 1279 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1280 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1281 { 1282 struct sctpasochead *head; 1283 struct sctp_inpcb *inp; 1284 struct sctp_tcb *stcb = NULL; 1285 struct sctp_nets *net; 1286 uint16_t rport; 1287 1288 inp = *inp_p; 1289 switch (remote->sa_family) { 1290 #ifdef INET 1291 case AF_INET: 1292 rport = (((struct sockaddr_in *)remote)->sin_port); 1293 break; 1294 #endif 1295 #ifdef INET6 1296 case AF_INET6: 1297 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1298 break; 1299 #endif 1300 default: 1301 return (NULL); 1302 } 1303 if (locked_tcb) { 1304 /* 1305 * UN-lock so we can do proper locking here this occurs when 1306 * called from load_addresses_from_init. 1307 */ 1308 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1309 SCTP_TCB_UNLOCK(locked_tcb); 1310 } 1311 SCTP_INP_INFO_RLOCK(); 1312 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1313 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1314 /*- 1315 * Now either this guy is our listener or it's the 1316 * connector. If it is the one that issued the connect, then 1317 * it's only chance is to be the first TCB in the list. If 1318 * it is the acceptor, then do the special_lookup to hash 1319 * and find the real inp. 1320 */ 1321 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1322 /* to is peer addr, from is my addr */ 1323 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1324 netp, inp->def_vrf_id); 1325 if ((stcb != NULL) && (locked_tcb == NULL)) { 1326 /* we have a locked tcb, lower refcount */ 1327 SCTP_INP_DECR_REF(inp); 1328 } 1329 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1330 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1331 SCTP_TCB_LOCK(locked_tcb); 1332 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1333 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1334 } 1335 SCTP_INP_INFO_RUNLOCK(); 1336 return (stcb); 1337 } else { 1338 SCTP_INP_WLOCK(inp); 1339 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1340 goto null_return; 1341 } 1342 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1343 if (stcb == NULL) { 1344 goto null_return; 1345 } 1346 SCTP_TCB_LOCK(stcb); 1347 1348 if (stcb->rport != rport) { 1349 /* remote port does not match. */ 1350 SCTP_TCB_UNLOCK(stcb); 1351 goto null_return; 1352 } 1353 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1354 SCTP_TCB_UNLOCK(stcb); 1355 goto null_return; 1356 } 1357 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1358 SCTP_TCB_UNLOCK(stcb); 1359 goto null_return; 1360 } 1361 /* now look at the list of remote addresses */ 1362 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1363 #ifdef INVARIANTS 1364 if (net == (TAILQ_NEXT(net, sctp_next))) { 1365 panic("Corrupt net list"); 1366 } 1367 #endif 1368 if (net->ro._l_addr.sa.sa_family != 1369 remote->sa_family) { 1370 /* not the same family */ 1371 continue; 1372 } 1373 switch (remote->sa_family) { 1374 #ifdef INET 1375 case AF_INET: 1376 { 1377 struct sockaddr_in *sin, 1378 *rsin; 1379 1380 sin = (struct sockaddr_in *) 1381 &net->ro._l_addr; 1382 rsin = (struct sockaddr_in *)remote; 1383 if (sin->sin_addr.s_addr == 1384 rsin->sin_addr.s_addr) { 1385 /* found it */ 1386 if (netp != NULL) { 1387 *netp = net; 1388 } 1389 if (locked_tcb == NULL) { 1390 SCTP_INP_DECR_REF(inp); 1391 } else if (locked_tcb != stcb) { 1392 SCTP_TCB_LOCK(locked_tcb); 1393 } 1394 if (locked_tcb) { 1395 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1396 } 1397 1398 SCTP_INP_WUNLOCK(inp); 1399 SCTP_INP_INFO_RUNLOCK(); 1400 return (stcb); 1401 } 1402 break; 1403 } 1404 #endif 1405 #ifdef INET6 1406 case AF_INET6: 1407 { 1408 struct sockaddr_in6 *sin6, 1409 *rsin6; 1410 1411 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1412 rsin6 = (struct sockaddr_in6 *)remote; 1413 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1414 rsin6)) { 1415 /* found it */ 1416 if (netp != NULL) { 1417 *netp = net; 1418 } 1419 if (locked_tcb == NULL) { 1420 SCTP_INP_DECR_REF(inp); 1421 } else if (locked_tcb != stcb) { 1422 SCTP_TCB_LOCK(locked_tcb); 1423 } 1424 if (locked_tcb) { 1425 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1426 } 1427 SCTP_INP_WUNLOCK(inp); 1428 SCTP_INP_INFO_RUNLOCK(); 1429 return (stcb); 1430 } 1431 break; 1432 } 1433 #endif 1434 default: 1435 /* TSNH */ 1436 break; 1437 } 1438 } 1439 SCTP_TCB_UNLOCK(stcb); 1440 } 1441 } else { 1442 SCTP_INP_WLOCK(inp); 1443 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1444 goto null_return; 1445 } 1446 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1447 inp->sctp_hashmark)]; 1448 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1449 if (stcb->rport != rport) { 1450 /* remote port does not match */ 1451 continue; 1452 } 1453 SCTP_TCB_LOCK(stcb); 1454 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1455 SCTP_TCB_UNLOCK(stcb); 1456 continue; 1457 } 1458 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1459 SCTP_TCB_UNLOCK(stcb); 1460 continue; 1461 } 1462 /* now look at the list of remote addresses */ 1463 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1464 #ifdef INVARIANTS 1465 if (net == (TAILQ_NEXT(net, sctp_next))) { 1466 panic("Corrupt net list"); 1467 } 1468 #endif 1469 if (net->ro._l_addr.sa.sa_family != 1470 remote->sa_family) { 1471 /* not the same family */ 1472 continue; 1473 } 1474 switch (remote->sa_family) { 1475 #ifdef INET 1476 case AF_INET: 1477 { 1478 struct sockaddr_in *sin, 1479 *rsin; 1480 1481 sin = (struct sockaddr_in *) 1482 &net->ro._l_addr; 1483 rsin = (struct sockaddr_in *)remote; 1484 if (sin->sin_addr.s_addr == 1485 rsin->sin_addr.s_addr) { 1486 /* found it */ 1487 if (netp != NULL) { 1488 *netp = net; 1489 } 1490 if (locked_tcb == NULL) { 1491 SCTP_INP_DECR_REF(inp); 1492 } else if (locked_tcb != stcb) { 1493 SCTP_TCB_LOCK(locked_tcb); 1494 } 1495 if (locked_tcb) { 1496 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1497 } 1498 SCTP_INP_WUNLOCK(inp); 1499 SCTP_INP_INFO_RUNLOCK(); 1500 return (stcb); 1501 } 1502 break; 1503 } 1504 #endif 1505 #ifdef INET6 1506 case AF_INET6: 1507 { 1508 struct sockaddr_in6 *sin6, 1509 *rsin6; 1510 1511 sin6 = (struct sockaddr_in6 *) 1512 &net->ro._l_addr; 1513 rsin6 = (struct sockaddr_in6 *)remote; 1514 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1515 rsin6)) { 1516 /* found it */ 1517 if (netp != NULL) { 1518 *netp = net; 1519 } 1520 if (locked_tcb == NULL) { 1521 SCTP_INP_DECR_REF(inp); 1522 } else if (locked_tcb != stcb) { 1523 SCTP_TCB_LOCK(locked_tcb); 1524 } 1525 if (locked_tcb) { 1526 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1527 } 1528 SCTP_INP_WUNLOCK(inp); 1529 SCTP_INP_INFO_RUNLOCK(); 1530 return (stcb); 1531 } 1532 break; 1533 } 1534 #endif 1535 default: 1536 /* TSNH */ 1537 break; 1538 } 1539 } 1540 SCTP_TCB_UNLOCK(stcb); 1541 } 1542 } 1543 null_return: 1544 /* clean up for returning null */ 1545 if (locked_tcb) { 1546 SCTP_TCB_LOCK(locked_tcb); 1547 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1548 } 1549 SCTP_INP_WUNLOCK(inp); 1550 SCTP_INP_INFO_RUNLOCK(); 1551 /* not found */ 1552 return (NULL); 1553 } 1554 1555 1556 /* 1557 * Find an association for a specific endpoint using the association id given 1558 * out in the COMM_UP notification 1559 */ 1560 struct sctp_tcb * 1561 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1562 { 1563 /* 1564 * Use my the assoc_id to find a endpoint 1565 */ 1566 struct sctpasochead *head; 1567 struct sctp_tcb *stcb; 1568 uint32_t id; 1569 1570 if (inp == NULL) { 1571 SCTP_PRINTF("TSNH ep_associd\n"); 1572 return (NULL); 1573 } 1574 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1575 SCTP_PRINTF("TSNH ep_associd0\n"); 1576 return (NULL); 1577 } 1578 id = (uint32_t)asoc_id; 1579 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1580 if (head == NULL) { 1581 /* invalid id TSNH */ 1582 SCTP_PRINTF("TSNH ep_associd1\n"); 1583 return (NULL); 1584 } 1585 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1586 if (stcb->asoc.assoc_id == id) { 1587 if (inp != stcb->sctp_ep) { 1588 /* 1589 * some other guy has the same id active (id 1590 * collision ??). 1591 */ 1592 SCTP_PRINTF("TSNH ep_associd2\n"); 1593 continue; 1594 } 1595 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1596 continue; 1597 } 1598 if (want_lock) { 1599 SCTP_TCB_LOCK(stcb); 1600 } 1601 return (stcb); 1602 } 1603 } 1604 return (NULL); 1605 } 1606 1607 1608 struct sctp_tcb * 1609 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1610 { 1611 struct sctp_tcb *stcb; 1612 1613 SCTP_INP_RLOCK(inp); 1614 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1615 SCTP_INP_RUNLOCK(inp); 1616 return (stcb); 1617 } 1618 1619 1620 /* 1621 * Endpoint probe expects that the INP_INFO is locked. 1622 */ 1623 static struct sctp_inpcb * 1624 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1625 uint16_t lport, uint32_t vrf_id) 1626 { 1627 struct sctp_inpcb *inp; 1628 struct sctp_laddr *laddr; 1629 #ifdef INET 1630 struct sockaddr_in *sin; 1631 #endif 1632 #ifdef INET6 1633 struct sockaddr_in6 *sin6; 1634 struct sockaddr_in6 *intf_addr6; 1635 #endif 1636 int fnd; 1637 1638 #ifdef INET 1639 sin = NULL; 1640 #endif 1641 #ifdef INET6 1642 sin6 = NULL; 1643 #endif 1644 switch (nam->sa_family) { 1645 #ifdef INET 1646 case AF_INET: 1647 sin = (struct sockaddr_in *)nam; 1648 break; 1649 #endif 1650 #ifdef INET6 1651 case AF_INET6: 1652 sin6 = (struct sockaddr_in6 *)nam; 1653 break; 1654 #endif 1655 default: 1656 /* unsupported family */ 1657 return (NULL); 1658 } 1659 1660 if (head == NULL) 1661 return (NULL); 1662 1663 LIST_FOREACH(inp, head, sctp_hash) { 1664 SCTP_INP_RLOCK(inp); 1665 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1666 SCTP_INP_RUNLOCK(inp); 1667 continue; 1668 } 1669 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1670 (inp->sctp_lport == lport)) { 1671 /* got it */ 1672 switch (nam->sa_family) { 1673 #ifdef INET 1674 case AF_INET: 1675 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1676 SCTP_IPV6_V6ONLY(inp)) { 1677 /* 1678 * IPv4 on a IPv6 socket with ONLY 1679 * IPv6 set 1680 */ 1681 SCTP_INP_RUNLOCK(inp); 1682 continue; 1683 } 1684 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1685 &sin->sin_addr) != 0) { 1686 SCTP_INP_RUNLOCK(inp); 1687 continue; 1688 } 1689 break; 1690 #endif 1691 #ifdef INET6 1692 case AF_INET6: 1693 /* 1694 * A V6 address and the endpoint is NOT 1695 * bound V6 1696 */ 1697 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1698 SCTP_INP_RUNLOCK(inp); 1699 continue; 1700 } 1701 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1702 &sin6->sin6_addr) != 0) { 1703 SCTP_INP_RUNLOCK(inp); 1704 continue; 1705 } 1706 break; 1707 #endif 1708 default: 1709 break; 1710 } 1711 /* does a VRF id match? */ 1712 fnd = 0; 1713 if (inp->def_vrf_id == vrf_id) 1714 fnd = 1; 1715 1716 SCTP_INP_RUNLOCK(inp); 1717 if (!fnd) 1718 continue; 1719 return (inp); 1720 } 1721 SCTP_INP_RUNLOCK(inp); 1722 } 1723 switch (nam->sa_family) { 1724 #ifdef INET 1725 case AF_INET: 1726 if (sin->sin_addr.s_addr == INADDR_ANY) { 1727 /* Can't hunt for one that has no address specified */ 1728 return (NULL); 1729 } 1730 break; 1731 #endif 1732 #ifdef INET6 1733 case AF_INET6: 1734 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1735 /* Can't hunt for one that has no address specified */ 1736 return (NULL); 1737 } 1738 break; 1739 #endif 1740 default: 1741 break; 1742 } 1743 /* 1744 * ok, not bound to all so see if we can find a EP bound to this 1745 * address. 1746 */ 1747 LIST_FOREACH(inp, head, sctp_hash) { 1748 SCTP_INP_RLOCK(inp); 1749 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1750 SCTP_INP_RUNLOCK(inp); 1751 continue; 1752 } 1753 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1754 SCTP_INP_RUNLOCK(inp); 1755 continue; 1756 } 1757 /* 1758 * Ok this could be a likely candidate, look at all of its 1759 * addresses 1760 */ 1761 if (inp->sctp_lport != lport) { 1762 SCTP_INP_RUNLOCK(inp); 1763 continue; 1764 } 1765 /* does a VRF id match? */ 1766 fnd = 0; 1767 if (inp->def_vrf_id == vrf_id) 1768 fnd = 1; 1769 1770 if (!fnd) { 1771 SCTP_INP_RUNLOCK(inp); 1772 continue; 1773 } 1774 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1775 if (laddr->ifa == NULL) { 1776 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1777 __func__); 1778 continue; 1779 } 1780 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1781 (void *)laddr->ifa); 1782 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1783 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1784 continue; 1785 } 1786 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1787 /* possible, see if it matches */ 1788 switch (nam->sa_family) { 1789 #ifdef INET 1790 case AF_INET: 1791 if (sin->sin_addr.s_addr == 1792 laddr->ifa->address.sin.sin_addr.s_addr) { 1793 SCTP_INP_RUNLOCK(inp); 1794 return (inp); 1795 } 1796 break; 1797 #endif 1798 #ifdef INET6 1799 case AF_INET6: 1800 intf_addr6 = &laddr->ifa->address.sin6; 1801 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1802 intf_addr6)) { 1803 SCTP_INP_RUNLOCK(inp); 1804 return (inp); 1805 } 1806 break; 1807 #endif 1808 } 1809 } 1810 } 1811 SCTP_INP_RUNLOCK(inp); 1812 } 1813 return (NULL); 1814 } 1815 1816 1817 static struct sctp_inpcb * 1818 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1819 { 1820 struct sctppcbhead *head; 1821 struct sctp_inpcb *t_inp; 1822 int fnd; 1823 1824 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1825 SCTP_BASE_INFO(hashmark))]; 1826 LIST_FOREACH(t_inp, head, sctp_hash) { 1827 if (t_inp->sctp_lport != lport) { 1828 continue; 1829 } 1830 /* is it in the VRF in question */ 1831 fnd = 0; 1832 if (t_inp->def_vrf_id == vrf_id) 1833 fnd = 1; 1834 if (!fnd) 1835 continue; 1836 1837 /* This one is in use. */ 1838 /* check the v6/v4 binding issue */ 1839 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1840 SCTP_IPV6_V6ONLY(t_inp)) { 1841 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1842 /* collision in V6 space */ 1843 return (t_inp); 1844 } else { 1845 /* inp is BOUND_V4 no conflict */ 1846 continue; 1847 } 1848 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1849 /* t_inp is bound v4 and v6, conflict always */ 1850 return (t_inp); 1851 } else { 1852 /* t_inp is bound only V4 */ 1853 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1854 SCTP_IPV6_V6ONLY(inp)) { 1855 /* no conflict */ 1856 continue; 1857 } 1858 /* else fall through to conflict */ 1859 } 1860 return (t_inp); 1861 } 1862 return (NULL); 1863 } 1864 1865 1866 int 1867 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1868 { 1869 /* For 1-2-1 with port reuse */ 1870 struct sctppcbhead *head; 1871 struct sctp_inpcb *tinp, *ninp; 1872 1873 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1874 /* only works with port reuse on */ 1875 return (-1); 1876 } 1877 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1878 return (0); 1879 } 1880 SCTP_INP_RUNLOCK(inp); 1881 SCTP_INP_INFO_WLOCK(); 1882 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1883 SCTP_BASE_INFO(hashmark))]; 1884 /* Kick out all non-listeners to the TCP hash */ 1885 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1886 if (tinp->sctp_lport != inp->sctp_lport) { 1887 continue; 1888 } 1889 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1890 continue; 1891 } 1892 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1893 continue; 1894 } 1895 if (SCTP_IS_LISTENING(tinp)) { 1896 continue; 1897 } 1898 SCTP_INP_WLOCK(tinp); 1899 LIST_REMOVE(tinp, sctp_hash); 1900 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1901 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1902 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1903 SCTP_INP_WUNLOCK(tinp); 1904 } 1905 SCTP_INP_WLOCK(inp); 1906 /* Pull from where he was */ 1907 LIST_REMOVE(inp, sctp_hash); 1908 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1909 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1910 LIST_INSERT_HEAD(head, inp, sctp_hash); 1911 SCTP_INP_WUNLOCK(inp); 1912 SCTP_INP_RLOCK(inp); 1913 SCTP_INP_INFO_WUNLOCK(); 1914 return (0); 1915 } 1916 1917 1918 struct sctp_inpcb * 1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1920 uint32_t vrf_id) 1921 { 1922 /* 1923 * First we check the hash table to see if someone has this port 1924 * bound with just the port. 1925 */ 1926 struct sctp_inpcb *inp; 1927 struct sctppcbhead *head; 1928 int lport; 1929 unsigned int i; 1930 #ifdef INET 1931 struct sockaddr_in *sin; 1932 #endif 1933 #ifdef INET6 1934 struct sockaddr_in6 *sin6; 1935 #endif 1936 1937 switch (nam->sa_family) { 1938 #ifdef INET 1939 case AF_INET: 1940 sin = (struct sockaddr_in *)nam; 1941 lport = sin->sin_port; 1942 break; 1943 #endif 1944 #ifdef INET6 1945 case AF_INET6: 1946 sin6 = (struct sockaddr_in6 *)nam; 1947 lport = sin6->sin6_port; 1948 break; 1949 #endif 1950 default: 1951 return (NULL); 1952 } 1953 /* 1954 * I could cheat here and just cast to one of the types but we will 1955 * do it right. It also provides the check against an Unsupported 1956 * type too. 1957 */ 1958 /* Find the head of the ALLADDR chain */ 1959 if (have_lock == 0) { 1960 SCTP_INP_INFO_RLOCK(); 1961 } 1962 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1963 SCTP_BASE_INFO(hashmark))]; 1964 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1965 1966 /* 1967 * If the TCP model exists it could be that the main listening 1968 * endpoint is gone but there still exists a connected socket for 1969 * this guy. If so we can return the first one that we find. This 1970 * may NOT be the correct one so the caller should be wary on the 1971 * returned INP. Currently the only caller that sets find_tcp_pool 1972 * is in bindx where we are verifying that a user CAN bind the 1973 * address. He either has bound it already, or someone else has, or 1974 * its open to bind, so this is good enough. 1975 */ 1976 if (inp == NULL && find_tcp_pool) { 1977 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1978 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1979 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1980 if (inp) { 1981 break; 1982 } 1983 } 1984 } 1985 if (inp) { 1986 SCTP_INP_INCR_REF(inp); 1987 } 1988 if (have_lock == 0) { 1989 SCTP_INP_INFO_RUNLOCK(); 1990 } 1991 return (inp); 1992 } 1993 1994 1995 /* 1996 * Find an association for an endpoint with the pointer to whom you want to 1997 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1998 * need to change the *to to some other struct like a mbuf... 1999 */ 2000 struct sctp_tcb * 2001 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2002 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2003 uint32_t vrf_id) 2004 { 2005 struct sctp_inpcb *inp = NULL; 2006 struct sctp_tcb *stcb; 2007 2008 SCTP_INP_INFO_RLOCK(); 2009 if (find_tcp_pool) { 2010 if (inp_p != NULL) { 2011 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2012 vrf_id); 2013 } else { 2014 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2015 vrf_id); 2016 } 2017 if (stcb != NULL) { 2018 SCTP_INP_INFO_RUNLOCK(); 2019 return (stcb); 2020 } 2021 } 2022 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2023 if (inp_p != NULL) { 2024 *inp_p = inp; 2025 } 2026 SCTP_INP_INFO_RUNLOCK(); 2027 if (inp == NULL) { 2028 return (NULL); 2029 } 2030 /* 2031 * ok, we have an endpoint, now lets find the assoc for it (if any) 2032 * we now place the source address or from in the to of the find 2033 * endpoint call. Since in reality this chain is used from the 2034 * inbound packet side. 2035 */ 2036 if (inp_p != NULL) { 2037 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2038 NULL); 2039 } else { 2040 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2041 NULL); 2042 } 2043 return (stcb); 2044 } 2045 2046 2047 /* 2048 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2049 * find all addresses that the sender has specified in any address list. Each 2050 * address will be used to lookup the TCB and see if one exits. 2051 */ 2052 static struct sctp_tcb * 2053 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2054 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2055 struct sockaddr *dst) 2056 { 2057 struct sctp_paramhdr *phdr, param_buf; 2058 #if defined(INET) || defined(INET6) 2059 struct sctp_tcb *stcb; 2060 uint16_t ptype; 2061 #endif 2062 uint16_t plen; 2063 #ifdef INET 2064 struct sockaddr_in sin4; 2065 #endif 2066 #ifdef INET6 2067 struct sockaddr_in6 sin6; 2068 #endif 2069 2070 #ifdef INET 2071 memset(&sin4, 0, sizeof(sin4)); 2072 sin4.sin_len = sizeof(sin4); 2073 sin4.sin_family = AF_INET; 2074 sin4.sin_port = sh->src_port; 2075 #endif 2076 #ifdef INET6 2077 memset(&sin6, 0, sizeof(sin6)); 2078 sin6.sin6_len = sizeof(sin6); 2079 sin6.sin6_family = AF_INET6; 2080 sin6.sin6_port = sh->src_port; 2081 #endif 2082 2083 offset += sizeof(struct sctp_init_chunk); 2084 2085 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2086 while (phdr != NULL) { 2087 /* now we must see if we want the parameter */ 2088 #if defined(INET) || defined(INET6) 2089 ptype = ntohs(phdr->param_type); 2090 #endif 2091 plen = ntohs(phdr->param_length); 2092 if (plen == 0) { 2093 break; 2094 } 2095 #ifdef INET 2096 if (ptype == SCTP_IPV4_ADDRESS && 2097 plen == sizeof(struct sctp_ipv4addr_param)) { 2098 /* Get the rest of the address */ 2099 struct sctp_ipv4addr_param ip4_param, *p4; 2100 2101 phdr = sctp_get_next_param(m, offset, 2102 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2103 if (phdr == NULL) { 2104 return (NULL); 2105 } 2106 p4 = (struct sctp_ipv4addr_param *)phdr; 2107 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2108 /* look it up */ 2109 stcb = sctp_findassociation_ep_addr(inp_p, 2110 (struct sockaddr *)&sin4, netp, dst, NULL); 2111 if (stcb != NULL) { 2112 return (stcb); 2113 } 2114 } 2115 #endif 2116 #ifdef INET6 2117 if (ptype == SCTP_IPV6_ADDRESS && 2118 plen == sizeof(struct sctp_ipv6addr_param)) { 2119 /* Get the rest of the address */ 2120 struct sctp_ipv6addr_param ip6_param, *p6; 2121 2122 phdr = sctp_get_next_param(m, offset, 2123 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2124 if (phdr == NULL) { 2125 return (NULL); 2126 } 2127 p6 = (struct sctp_ipv6addr_param *)phdr; 2128 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2129 /* look it up */ 2130 stcb = sctp_findassociation_ep_addr(inp_p, 2131 (struct sockaddr *)&sin6, netp, dst, NULL); 2132 if (stcb != NULL) { 2133 return (stcb); 2134 } 2135 } 2136 #endif 2137 offset += SCTP_SIZE32(plen); 2138 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2139 sizeof(param_buf)); 2140 } 2141 return (NULL); 2142 } 2143 2144 static struct sctp_tcb * 2145 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2146 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2147 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2148 { 2149 /* 2150 * Use my vtag to hash. If we find it we then verify the source addr 2151 * is in the assoc. If all goes well we save a bit on rec of a 2152 * packet. 2153 */ 2154 struct sctpasochead *head; 2155 struct sctp_nets *net; 2156 struct sctp_tcb *stcb; 2157 2158 SCTP_INP_INFO_RLOCK(); 2159 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2160 SCTP_BASE_INFO(hashasocmark))]; 2161 LIST_FOREACH(stcb, head, sctp_asocs) { 2162 SCTP_INP_RLOCK(stcb->sctp_ep); 2163 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2164 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2165 continue; 2166 } 2167 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2168 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2169 continue; 2170 } 2171 SCTP_TCB_LOCK(stcb); 2172 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2173 if (stcb->asoc.my_vtag == vtag) { 2174 /* candidate */ 2175 if (stcb->rport != rport) { 2176 SCTP_TCB_UNLOCK(stcb); 2177 continue; 2178 } 2179 if (stcb->sctp_ep->sctp_lport != lport) { 2180 SCTP_TCB_UNLOCK(stcb); 2181 continue; 2182 } 2183 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2184 SCTP_TCB_UNLOCK(stcb); 2185 continue; 2186 } 2187 /* RRS:Need toaddr check here */ 2188 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2189 /* Endpoint does not own this address */ 2190 SCTP_TCB_UNLOCK(stcb); 2191 continue; 2192 } 2193 if (remote_tag) { 2194 /* 2195 * If we have both vtags that's all we match 2196 * on 2197 */ 2198 if (stcb->asoc.peer_vtag == remote_tag) { 2199 /* 2200 * If both tags match we consider it 2201 * conclusive and check NO 2202 * source/destination addresses 2203 */ 2204 goto conclusive; 2205 } 2206 } 2207 if (skip_src_check) { 2208 conclusive: 2209 if (from) { 2210 *netp = sctp_findnet(stcb, from); 2211 } else { 2212 *netp = NULL; /* unknown */ 2213 } 2214 if (inp_p) 2215 *inp_p = stcb->sctp_ep; 2216 SCTP_INP_INFO_RUNLOCK(); 2217 return (stcb); 2218 } 2219 net = sctp_findnet(stcb, from); 2220 if (net) { 2221 /* yep its him. */ 2222 *netp = net; 2223 SCTP_STAT_INCR(sctps_vtagexpress); 2224 *inp_p = stcb->sctp_ep; 2225 SCTP_INP_INFO_RUNLOCK(); 2226 return (stcb); 2227 } else { 2228 /* 2229 * not him, this should only happen in rare 2230 * cases so I peg it. 2231 */ 2232 SCTP_STAT_INCR(sctps_vtagbogus); 2233 } 2234 } 2235 SCTP_TCB_UNLOCK(stcb); 2236 } 2237 SCTP_INP_INFO_RUNLOCK(); 2238 return (NULL); 2239 } 2240 2241 2242 /* 2243 * Find an association with the pointer to the inbound IP packet. This can be 2244 * a IPv4 or IPv6 packet. 2245 */ 2246 struct sctp_tcb * 2247 sctp_findassociation_addr(struct mbuf *m, int offset, 2248 struct sockaddr *src, struct sockaddr *dst, 2249 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2250 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2251 { 2252 struct sctp_tcb *stcb; 2253 struct sctp_inpcb *inp; 2254 2255 if (sh->v_tag) { 2256 /* we only go down this path if vtag is non-zero */ 2257 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2258 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2259 if (stcb) { 2260 return (stcb); 2261 } 2262 } 2263 2264 if (inp_p) { 2265 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2266 1, vrf_id); 2267 inp = *inp_p; 2268 } else { 2269 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2270 1, vrf_id); 2271 } 2272 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2273 if (stcb == NULL && inp) { 2274 /* Found a EP but not this address */ 2275 if ((ch->chunk_type == SCTP_INITIATION) || 2276 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2277 /*- 2278 * special hook, we do NOT return linp or an 2279 * association that is linked to an existing 2280 * association that is under the TCP pool (i.e. no 2281 * listener exists). The endpoint finding routine 2282 * will always find a listener before examining the 2283 * TCP pool. 2284 */ 2285 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2286 if (inp_p) { 2287 *inp_p = NULL; 2288 } 2289 return (NULL); 2290 } 2291 stcb = sctp_findassociation_special_addr(m, 2292 offset, sh, &inp, netp, dst); 2293 if (inp_p != NULL) { 2294 *inp_p = inp; 2295 } 2296 } 2297 } 2298 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2299 return (stcb); 2300 } 2301 2302 /* 2303 * lookup an association by an ASCONF lookup address. 2304 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2305 */ 2306 struct sctp_tcb * 2307 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2308 struct sockaddr *dst, struct sctphdr *sh, 2309 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2310 { 2311 struct sctp_tcb *stcb; 2312 union sctp_sockstore remote_store; 2313 struct sctp_paramhdr param_buf, *phdr; 2314 int ptype; 2315 int zero_address = 0; 2316 #ifdef INET 2317 struct sockaddr_in *sin; 2318 #endif 2319 #ifdef INET6 2320 struct sockaddr_in6 *sin6; 2321 #endif 2322 2323 memset(&remote_store, 0, sizeof(remote_store)); 2324 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2325 ¶m_buf, sizeof(struct sctp_paramhdr)); 2326 if (phdr == NULL) { 2327 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2328 __func__); 2329 return NULL; 2330 } 2331 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2332 /* get the correlation address */ 2333 switch (ptype) { 2334 #ifdef INET6 2335 case SCTP_IPV6_ADDRESS: 2336 { 2337 /* ipv6 address param */ 2338 struct sctp_ipv6addr_param *p6, p6_buf; 2339 2340 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2341 return NULL; 2342 } 2343 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2344 offset + sizeof(struct sctp_asconf_chunk), 2345 &p6_buf.ph, sizeof(p6_buf)); 2346 if (p6 == NULL) { 2347 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2348 __func__); 2349 return (NULL); 2350 } 2351 sin6 = &remote_store.sin6; 2352 sin6->sin6_family = AF_INET6; 2353 sin6->sin6_len = sizeof(*sin6); 2354 sin6->sin6_port = sh->src_port; 2355 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2356 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2357 zero_address = 1; 2358 break; 2359 } 2360 #endif 2361 #ifdef INET 2362 case SCTP_IPV4_ADDRESS: 2363 { 2364 /* ipv4 address param */ 2365 struct sctp_ipv4addr_param *p4, p4_buf; 2366 2367 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2368 return NULL; 2369 } 2370 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2371 offset + sizeof(struct sctp_asconf_chunk), 2372 &p4_buf.ph, sizeof(p4_buf)); 2373 if (p4 == NULL) { 2374 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2375 __func__); 2376 return (NULL); 2377 } 2378 sin = &remote_store.sin; 2379 sin->sin_family = AF_INET; 2380 sin->sin_len = sizeof(*sin); 2381 sin->sin_port = sh->src_port; 2382 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2383 if (sin->sin_addr.s_addr == INADDR_ANY) 2384 zero_address = 1; 2385 break; 2386 } 2387 #endif 2388 default: 2389 /* invalid address param type */ 2390 return NULL; 2391 } 2392 2393 if (zero_address) { 2394 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2395 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2396 if (stcb != NULL) { 2397 SCTP_INP_DECR_REF(*inp_p); 2398 } 2399 } else { 2400 stcb = sctp_findassociation_ep_addr(inp_p, 2401 &remote_store.sa, netp, 2402 dst, NULL); 2403 } 2404 return (stcb); 2405 } 2406 2407 2408 /* 2409 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2410 * addresses. This way if we don't get a bind we by default pick a ephemeral 2411 * port with all addresses bound. 2412 */ 2413 int 2414 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2415 { 2416 /* 2417 * we get called when a new endpoint starts up. We need to allocate 2418 * the sctp_inpcb structure from the zone and init it. Mark it as 2419 * unbound and find a port that we can use as an ephemeral with 2420 * INADDR_ANY. If the user binds later no problem we can then add in 2421 * the specific addresses. And setup the default parameters for the 2422 * EP. 2423 */ 2424 int i, error; 2425 struct sctp_inpcb *inp; 2426 struct sctp_pcb *m; 2427 struct timeval time; 2428 sctp_sharedkey_t *null_key; 2429 2430 error = 0; 2431 2432 SCTP_INP_INFO_WLOCK(); 2433 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2434 if (inp == NULL) { 2435 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2436 SCTP_INP_INFO_WUNLOCK(); 2437 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2438 return (ENOBUFS); 2439 } 2440 /* zap it */ 2441 memset(inp, 0, sizeof(*inp)); 2442 2443 /* bump generations */ 2444 /* setup socket pointers */ 2445 inp->sctp_socket = so; 2446 inp->ip_inp.inp.inp_socket = so; 2447 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2448 #ifdef INET6 2449 if (INP_SOCKAF(so) == AF_INET6) { 2450 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2451 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2452 } 2453 if (MODULE_GLOBAL(ip6_v6only)) { 2454 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2455 } 2456 } 2457 #endif 2458 inp->sctp_associd_counter = 1; 2459 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2460 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2461 inp->max_cwnd = 0; 2462 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2463 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2464 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2465 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2466 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2467 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2468 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2469 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2470 inp->idata_supported = 0; 2471 2472 inp->fibnum = so->so_fibnum; 2473 /* init the small hash table we use to track asocid <-> tcb */ 2474 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2475 if (inp->sctp_asocidhash == NULL) { 2476 crfree(inp->ip_inp.inp.inp_cred); 2477 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2478 SCTP_INP_INFO_WUNLOCK(); 2479 return (ENOBUFS); 2480 } 2481 SCTP_INCR_EP_COUNT(); 2482 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2483 SCTP_INP_INFO_WUNLOCK(); 2484 2485 so->so_pcb = (caddr_t)inp; 2486 2487 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2488 /* UDP style socket */ 2489 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2490 SCTP_PCB_FLAGS_UNBOUND); 2491 /* Be sure it is NON-BLOCKING IO for UDP */ 2492 /* SCTP_SET_SO_NBIO(so); */ 2493 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2494 /* TCP style socket */ 2495 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2496 SCTP_PCB_FLAGS_UNBOUND); 2497 /* Be sure we have blocking IO by default */ 2498 SOCK_LOCK(so); 2499 SCTP_CLEAR_SO_NBIO(so); 2500 SOCK_UNLOCK(so); 2501 } else { 2502 /* 2503 * unsupported socket type (RAW, etc)- in case we missed it 2504 * in protosw 2505 */ 2506 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2507 so->so_pcb = NULL; 2508 crfree(inp->ip_inp.inp.inp_cred); 2509 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2510 return (EOPNOTSUPP); 2511 } 2512 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2513 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2514 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2515 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2516 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2517 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2518 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2519 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2520 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2521 } 2522 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2523 &inp->sctp_hashmark); 2524 if (inp->sctp_tcbhash == NULL) { 2525 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2526 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2527 so->so_pcb = NULL; 2528 crfree(inp->ip_inp.inp.inp_cred); 2529 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2530 return (ENOBUFS); 2531 } 2532 inp->def_vrf_id = vrf_id; 2533 2534 SCTP_INP_INFO_WLOCK(); 2535 SCTP_INP_LOCK_INIT(inp); 2536 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2537 SCTP_INP_READ_INIT(inp); 2538 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2539 /* lock the new ep */ 2540 SCTP_INP_WLOCK(inp); 2541 2542 /* add it to the info area */ 2543 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2544 SCTP_INP_INFO_WUNLOCK(); 2545 2546 TAILQ_INIT(&inp->read_queue); 2547 LIST_INIT(&inp->sctp_addr_list); 2548 2549 LIST_INIT(&inp->sctp_asoc_list); 2550 2551 #ifdef SCTP_TRACK_FREED_ASOCS 2552 /* TEMP CODE */ 2553 LIST_INIT(&inp->sctp_asoc_free_list); 2554 #endif 2555 /* Init the timer structure for signature change */ 2556 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2557 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2558 2559 /* now init the actual endpoint default data */ 2560 m = &inp->sctp_ep; 2561 2562 /* setup the base timeout information */ 2563 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2564 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2565 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2566 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2567 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2568 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2569 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2570 /* all max/min max are in ms */ 2571 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2572 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2573 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2574 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2575 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2576 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2577 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2578 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2579 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2580 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2581 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2582 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2583 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2584 2585 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2586 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2587 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2588 /* number of streams to pre-open on a association */ 2589 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2590 2591 m->default_mtu = 0; 2592 /* Add adaptation cookie */ 2593 m->adaptation_layer_indicator = 0; 2594 m->adaptation_layer_indicator_provided = 0; 2595 2596 /* seed random number generator */ 2597 m->random_counter = 1; 2598 m->store_at = SCTP_SIGNATURE_SIZE; 2599 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2600 sctp_fill_random_store(m); 2601 2602 /* Minimum cookie size */ 2603 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2604 sizeof(struct sctp_state_cookie); 2605 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2606 2607 /* Setup the initial secret */ 2608 (void)SCTP_GETTIME_TIMEVAL(&time); 2609 m->time_of_secret_change = time.tv_sec; 2610 2611 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2612 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2613 } 2614 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2615 2616 /* How long is a cookie good for ? */ 2617 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2618 /* 2619 * Initialize authentication parameters 2620 */ 2621 m->local_hmacs = sctp_default_supported_hmaclist(); 2622 m->local_auth_chunks = sctp_alloc_chunklist(); 2623 if (inp->asconf_supported) { 2624 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2625 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2626 } 2627 m->default_dscp = 0; 2628 #ifdef INET6 2629 m->default_flowlabel = 0; 2630 #endif 2631 m->port = 0; /* encapsulation disabled by default */ 2632 LIST_INIT(&m->shared_keys); 2633 /* add default NULL key as key id 0 */ 2634 null_key = sctp_alloc_sharedkey(); 2635 sctp_insert_sharedkey(&m->shared_keys, null_key); 2636 SCTP_INP_WUNLOCK(inp); 2637 #ifdef SCTP_LOG_CLOSING 2638 sctp_log_closing(inp, NULL, 12); 2639 #endif 2640 return (error); 2641 } 2642 2643 2644 void 2645 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2646 struct sctp_tcb *stcb) 2647 { 2648 struct sctp_nets *net; 2649 uint16_t lport, rport; 2650 struct sctppcbhead *head; 2651 struct sctp_laddr *laddr, *oladdr; 2652 2653 atomic_add_int(&stcb->asoc.refcnt, 1); 2654 SCTP_TCB_UNLOCK(stcb); 2655 SCTP_INP_INFO_WLOCK(); 2656 SCTP_INP_WLOCK(old_inp); 2657 SCTP_INP_WLOCK(new_inp); 2658 SCTP_TCB_LOCK(stcb); 2659 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2660 2661 new_inp->sctp_ep.time_of_secret_change = 2662 old_inp->sctp_ep.time_of_secret_change; 2663 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2664 sizeof(old_inp->sctp_ep.secret_key)); 2665 new_inp->sctp_ep.current_secret_number = 2666 old_inp->sctp_ep.current_secret_number; 2667 new_inp->sctp_ep.last_secret_number = 2668 old_inp->sctp_ep.last_secret_number; 2669 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2670 2671 /* make it so new data pours into the new socket */ 2672 stcb->sctp_socket = new_inp->sctp_socket; 2673 stcb->sctp_ep = new_inp; 2674 2675 /* Copy the port across */ 2676 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2677 rport = stcb->rport; 2678 /* Pull the tcb from the old association */ 2679 LIST_REMOVE(stcb, sctp_tcbhash); 2680 LIST_REMOVE(stcb, sctp_tcblist); 2681 if (stcb->asoc.in_asocid_hash) { 2682 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2683 } 2684 /* Now insert the new_inp into the TCP connected hash */ 2685 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2686 2687 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2688 /* Its safe to access */ 2689 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2690 2691 /* Now move the tcb into the endpoint list */ 2692 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2693 /* 2694 * Question, do we even need to worry about the ep-hash since we 2695 * only have one connection? Probably not :> so lets get rid of it 2696 * and not suck up any kernel memory in that. 2697 */ 2698 if (stcb->asoc.in_asocid_hash) { 2699 struct sctpasochead *lhd; 2700 2701 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2702 new_inp->hashasocidmark)]; 2703 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2704 } 2705 /* Ok. Let's restart timer. */ 2706 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2707 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2708 stcb, net); 2709 } 2710 2711 SCTP_INP_INFO_WUNLOCK(); 2712 if (new_inp->sctp_tcbhash != NULL) { 2713 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2714 new_inp->sctp_tcbhash = NULL; 2715 } 2716 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2717 /* Subset bound, so copy in the laddr list from the old_inp */ 2718 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2719 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2720 if (laddr == NULL) { 2721 /* 2722 * Gak, what can we do? This assoc is really 2723 * HOSED. We probably should send an abort 2724 * here. 2725 */ 2726 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2727 continue; 2728 } 2729 SCTP_INCR_LADDR_COUNT(); 2730 memset(laddr, 0, sizeof(*laddr)); 2731 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2732 laddr->ifa = oladdr->ifa; 2733 atomic_add_int(&laddr->ifa->refcount, 1); 2734 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2735 sctp_nxt_addr); 2736 new_inp->laddr_count++; 2737 if (oladdr == stcb->asoc.last_used_address) { 2738 stcb->asoc.last_used_address = laddr; 2739 } 2740 } 2741 } 2742 /* 2743 * Now any running timers need to be adjusted since we really don't 2744 * care if they are running or not just blast in the new_inp into 2745 * all of them. 2746 */ 2747 2748 stcb->asoc.dack_timer.ep = (void *)new_inp; 2749 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2750 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2751 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2752 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2753 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2754 /* now what about the nets? */ 2755 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2756 net->pmtu_timer.ep = (void *)new_inp; 2757 net->hb_timer.ep = (void *)new_inp; 2758 net->rxt_timer.ep = (void *)new_inp; 2759 } 2760 SCTP_INP_WUNLOCK(new_inp); 2761 SCTP_INP_WUNLOCK(old_inp); 2762 } 2763 2764 /* 2765 * insert an laddr entry with the given ifa for the desired list 2766 */ 2767 static int 2768 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2769 { 2770 struct sctp_laddr *laddr; 2771 2772 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2773 if (laddr == NULL) { 2774 /* out of memory? */ 2775 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2776 return (EINVAL); 2777 } 2778 SCTP_INCR_LADDR_COUNT(); 2779 memset(laddr, 0, sizeof(*laddr)); 2780 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2781 laddr->ifa = ifa; 2782 laddr->action = act; 2783 atomic_add_int(&ifa->refcount, 1); 2784 /* insert it */ 2785 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2786 2787 return (0); 2788 } 2789 2790 /* 2791 * Remove an laddr entry from the local address list (on an assoc) 2792 */ 2793 static void 2794 sctp_remove_laddr(struct sctp_laddr *laddr) 2795 { 2796 2797 /* remove from the list */ 2798 LIST_REMOVE(laddr, sctp_nxt_addr); 2799 sctp_free_ifa(laddr->ifa); 2800 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2801 SCTP_DECR_LADDR_COUNT(); 2802 } 2803 2804 2805 2806 /* sctp_ifap is used to bypass normal local address validation checks */ 2807 int 2808 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2809 struct sctp_ifa *sctp_ifap, struct thread *p) 2810 { 2811 /* bind a ep to a socket address */ 2812 struct sctppcbhead *head; 2813 struct sctp_inpcb *inp, *inp_tmp; 2814 struct inpcb *ip_inp; 2815 int port_reuse_active = 0; 2816 int bindall; 2817 uint16_t lport; 2818 int error; 2819 uint32_t vrf_id; 2820 2821 lport = 0; 2822 bindall = 1; 2823 inp = (struct sctp_inpcb *)so->so_pcb; 2824 ip_inp = (struct inpcb *)so->so_pcb; 2825 #ifdef SCTP_DEBUG 2826 if (addr) { 2827 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2828 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2829 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2830 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2831 } 2832 #endif 2833 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2834 /* already did a bind, subsequent binds NOT allowed ! */ 2835 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2836 return (EINVAL); 2837 } 2838 #ifdef INVARIANTS 2839 if (p == NULL) 2840 panic("null proc/thread"); 2841 #endif 2842 if (addr != NULL) { 2843 switch (addr->sa_family) { 2844 #ifdef INET 2845 case AF_INET: 2846 { 2847 struct sockaddr_in *sin; 2848 2849 /* IPV6_V6ONLY socket? */ 2850 if (SCTP_IPV6_V6ONLY(inp)) { 2851 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2852 return (EINVAL); 2853 } 2854 if (addr->sa_len != sizeof(*sin)) { 2855 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2856 return (EINVAL); 2857 } 2858 2859 sin = (struct sockaddr_in *)addr; 2860 lport = sin->sin_port; 2861 /* 2862 * For LOOPBACK the prison_local_ip4() call 2863 * will transmute the ip address to the 2864 * proper value. 2865 */ 2866 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2867 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2868 return (error); 2869 } 2870 if (sin->sin_addr.s_addr != INADDR_ANY) { 2871 bindall = 0; 2872 } 2873 break; 2874 } 2875 #endif 2876 #ifdef INET6 2877 case AF_INET6: 2878 { 2879 /* 2880 * Only for pure IPv6 Address. (No IPv4 2881 * Mapped!) 2882 */ 2883 struct sockaddr_in6 *sin6; 2884 2885 sin6 = (struct sockaddr_in6 *)addr; 2886 2887 if (addr->sa_len != sizeof(*sin6)) { 2888 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2889 return (EINVAL); 2890 } 2891 lport = sin6->sin6_port; 2892 /* 2893 * For LOOPBACK the prison_local_ip6() call 2894 * will transmute the ipv6 address to the 2895 * proper value. 2896 */ 2897 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2898 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2899 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2900 return (error); 2901 } 2902 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2903 bindall = 0; 2904 /* KAME hack: embed scopeid */ 2905 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2906 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2907 return (EINVAL); 2908 } 2909 } 2910 /* this must be cleared for ifa_ifwithaddr() */ 2911 sin6->sin6_scope_id = 0; 2912 break; 2913 } 2914 #endif 2915 default: 2916 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2917 return (EAFNOSUPPORT); 2918 } 2919 } 2920 SCTP_INP_INFO_WLOCK(); 2921 SCTP_INP_WLOCK(inp); 2922 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2923 vrf_id = inp->def_vrf_id; 2924 2925 /* increase our count due to the unlock we do */ 2926 SCTP_INP_INCR_REF(inp); 2927 if (lport) { 2928 /* 2929 * Did the caller specify a port? if so we must see if an ep 2930 * already has this one bound. 2931 */ 2932 /* got to be root to get at low ports */ 2933 if (ntohs(lport) < IPPORT_RESERVED) { 2934 if ((p != NULL) && ((error = 2935 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2936 ) != 0)) { 2937 SCTP_INP_DECR_REF(inp); 2938 SCTP_INP_WUNLOCK(inp); 2939 SCTP_INP_INFO_WUNLOCK(); 2940 return (error); 2941 } 2942 } 2943 SCTP_INP_WUNLOCK(inp); 2944 if (bindall) { 2945 vrf_id = inp->def_vrf_id; 2946 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2947 if (inp_tmp != NULL) { 2948 /* 2949 * lock guy returned and lower count note 2950 * that we are not bound so inp_tmp should 2951 * NEVER be inp. And it is this inp 2952 * (inp_tmp) that gets the reference bump, 2953 * so we must lower it. 2954 */ 2955 SCTP_INP_DECR_REF(inp_tmp); 2956 /* unlock info */ 2957 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2958 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2959 /* 2960 * Ok, must be one-2-one and 2961 * allowing port re-use 2962 */ 2963 port_reuse_active = 1; 2964 goto continue_anyway; 2965 } 2966 SCTP_INP_DECR_REF(inp); 2967 SCTP_INP_INFO_WUNLOCK(); 2968 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2969 return (EADDRINUSE); 2970 } 2971 } else { 2972 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2973 if (inp_tmp != NULL) { 2974 /* 2975 * lock guy returned and lower count note 2976 * that we are not bound so inp_tmp should 2977 * NEVER be inp. And it is this inp 2978 * (inp_tmp) that gets the reference bump, 2979 * so we must lower it. 2980 */ 2981 SCTP_INP_DECR_REF(inp_tmp); 2982 /* unlock info */ 2983 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2984 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2985 /* 2986 * Ok, must be one-2-one and 2987 * allowing port re-use 2988 */ 2989 port_reuse_active = 1; 2990 goto continue_anyway; 2991 } 2992 SCTP_INP_DECR_REF(inp); 2993 SCTP_INP_INFO_WUNLOCK(); 2994 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2995 return (EADDRINUSE); 2996 } 2997 } 2998 continue_anyway: 2999 SCTP_INP_WLOCK(inp); 3000 if (bindall) { 3001 /* verify that no lport is not used by a singleton */ 3002 if ((port_reuse_active == 0) && 3003 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3004 /* Sorry someone already has this one bound */ 3005 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3006 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3007 port_reuse_active = 1; 3008 } else { 3009 SCTP_INP_DECR_REF(inp); 3010 SCTP_INP_WUNLOCK(inp); 3011 SCTP_INP_INFO_WUNLOCK(); 3012 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3013 return (EADDRINUSE); 3014 } 3015 } 3016 } 3017 } else { 3018 uint16_t first, last, candidate; 3019 uint16_t count; 3020 int done; 3021 3022 if (ip_inp->inp_flags & INP_HIGHPORT) { 3023 first = MODULE_GLOBAL(ipport_hifirstauto); 3024 last = MODULE_GLOBAL(ipport_hilastauto); 3025 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3026 if (p && (error = 3027 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3028 )) { 3029 SCTP_INP_DECR_REF(inp); 3030 SCTP_INP_WUNLOCK(inp); 3031 SCTP_INP_INFO_WUNLOCK(); 3032 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3033 return (error); 3034 } 3035 first = MODULE_GLOBAL(ipport_lowfirstauto); 3036 last = MODULE_GLOBAL(ipport_lowlastauto); 3037 } else { 3038 first = MODULE_GLOBAL(ipport_firstauto); 3039 last = MODULE_GLOBAL(ipport_lastauto); 3040 } 3041 if (first > last) { 3042 uint16_t temp; 3043 3044 temp = first; 3045 first = last; 3046 last = temp; 3047 } 3048 count = last - first + 1; /* number of candidates */ 3049 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3050 3051 done = 0; 3052 while (!done) { 3053 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3054 done = 1; 3055 } 3056 if (!done) { 3057 if (--count == 0) { 3058 SCTP_INP_DECR_REF(inp); 3059 SCTP_INP_WUNLOCK(inp); 3060 SCTP_INP_INFO_WUNLOCK(); 3061 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3062 return (EADDRINUSE); 3063 } 3064 if (candidate == last) 3065 candidate = first; 3066 else 3067 candidate = candidate + 1; 3068 } 3069 } 3070 lport = htons(candidate); 3071 } 3072 SCTP_INP_DECR_REF(inp); 3073 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3074 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3075 /* 3076 * this really should not happen. The guy did a non-blocking 3077 * bind and then did a close at the same time. 3078 */ 3079 SCTP_INP_WUNLOCK(inp); 3080 SCTP_INP_INFO_WUNLOCK(); 3081 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3082 return (EINVAL); 3083 } 3084 /* ok we look clear to give out this port, so lets setup the binding */ 3085 if (bindall) { 3086 /* binding to all addresses, so just set in the proper flags */ 3087 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3088 /* set the automatic addr changes from kernel flag */ 3089 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3090 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3091 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3092 } else { 3093 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3094 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3095 } 3096 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3097 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3098 } else { 3099 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3100 } 3101 /* 3102 * set the automatic mobility_base from kernel flag (by 3103 * micchie) 3104 */ 3105 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3106 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3107 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3108 } else { 3109 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3110 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3111 } 3112 /* 3113 * set the automatic mobility_fasthandoff from kernel flag 3114 * (by micchie) 3115 */ 3116 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3117 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3118 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3119 } else { 3120 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3121 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3122 } 3123 } else { 3124 /* 3125 * bind specific, make sure flags is off and add a new 3126 * address structure to the sctp_addr_list inside the ep 3127 * structure. 3128 * 3129 * We will need to allocate one and insert it at the head. 3130 * The socketopt call can just insert new addresses in there 3131 * as well. It will also have to do the embed scope kame 3132 * hack too (before adding). 3133 */ 3134 struct sctp_ifa *ifa; 3135 union sctp_sockstore store; 3136 3137 memset(&store, 0, sizeof(store)); 3138 switch (addr->sa_family) { 3139 #ifdef INET 3140 case AF_INET: 3141 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3142 store.sin.sin_port = 0; 3143 break; 3144 #endif 3145 #ifdef INET6 3146 case AF_INET6: 3147 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3148 store.sin6.sin6_port = 0; 3149 break; 3150 #endif 3151 default: 3152 break; 3153 } 3154 /* 3155 * first find the interface with the bound address need to 3156 * zero out the port to find the address! yuck! can't do 3157 * this earlier since need port for sctp_pcb_findep() 3158 */ 3159 if (sctp_ifap != NULL) { 3160 ifa = sctp_ifap; 3161 } else { 3162 /* 3163 * Note for BSD we hit here always other O/S's will 3164 * pass things in via the sctp_ifap argument. 3165 */ 3166 ifa = sctp_find_ifa_by_addr(&store.sa, 3167 vrf_id, SCTP_ADDR_NOT_LOCKED); 3168 } 3169 if (ifa == NULL) { 3170 /* Can't find an interface with that address */ 3171 SCTP_INP_WUNLOCK(inp); 3172 SCTP_INP_INFO_WUNLOCK(); 3173 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3174 return (EADDRNOTAVAIL); 3175 } 3176 #ifdef INET6 3177 if (addr->sa_family == AF_INET6) { 3178 /* GAK, more FIXME IFA lock? */ 3179 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3180 /* Can't bind a non-existent addr. */ 3181 SCTP_INP_WUNLOCK(inp); 3182 SCTP_INP_INFO_WUNLOCK(); 3183 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3184 return (EINVAL); 3185 } 3186 } 3187 #endif 3188 /* we're not bound all */ 3189 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3190 /* allow bindx() to send ASCONF's for binding changes */ 3191 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3192 /* clear automatic addr changes from kernel flag */ 3193 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3194 3195 /* add this address to the endpoint list */ 3196 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3197 if (error != 0) { 3198 SCTP_INP_WUNLOCK(inp); 3199 SCTP_INP_INFO_WUNLOCK(); 3200 return (error); 3201 } 3202 inp->laddr_count++; 3203 } 3204 /* find the bucket */ 3205 if (port_reuse_active) { 3206 /* Put it into tcp 1-2-1 hash */ 3207 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3208 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3209 } else { 3210 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3211 } 3212 /* put it in the bucket */ 3213 LIST_INSERT_HEAD(head, inp, sctp_hash); 3214 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3215 (void *)head, ntohs(lport), port_reuse_active); 3216 /* set in the port */ 3217 inp->sctp_lport = lport; 3218 3219 /* turn off just the unbound flag */ 3220 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3221 SCTP_INP_WUNLOCK(inp); 3222 SCTP_INP_INFO_WUNLOCK(); 3223 return (0); 3224 } 3225 3226 3227 static void 3228 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3229 { 3230 struct sctp_iterator *it, *nit; 3231 3232 /* 3233 * We enter with the only the ITERATOR_LOCK in place and a write 3234 * lock on the inp_info stuff. 3235 */ 3236 it = sctp_it_ctl.cur_it; 3237 if (it && (it->vn != curvnet)) { 3238 /* Its not looking at our VNET */ 3239 return; 3240 } 3241 if (it && (it->inp == inp)) { 3242 /* 3243 * This is tricky and we hold the iterator lock, but when it 3244 * returns and gets the lock (when we release it) the 3245 * iterator will try to operate on inp. We need to stop that 3246 * from happening. But of course the iterator has a 3247 * reference on the stcb and inp. We can mark it and it will 3248 * stop. 3249 * 3250 * If its a single iterator situation, we set the end 3251 * iterator flag. Otherwise we set the iterator to go to the 3252 * next inp. 3253 * 3254 */ 3255 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3256 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3257 } else { 3258 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3259 } 3260 } 3261 /* 3262 * Now go through and remove any single reference to our inp that 3263 * may be still pending on the list 3264 */ 3265 SCTP_IPI_ITERATOR_WQ_LOCK(); 3266 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3267 if (it->vn != curvnet) { 3268 continue; 3269 } 3270 if (it->inp == inp) { 3271 /* This one points to me is it inp specific? */ 3272 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3273 /* Remove and free this one */ 3274 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3275 it, sctp_nxt_itr); 3276 if (it->function_atend != NULL) { 3277 (*it->function_atend) (it->pointer, it->val); 3278 } 3279 SCTP_FREE(it, SCTP_M_ITER); 3280 } else { 3281 it->inp = LIST_NEXT(it->inp, sctp_list); 3282 if (it->inp) { 3283 SCTP_INP_INCR_REF(it->inp); 3284 } 3285 } 3286 /* 3287 * When its put in the refcnt is incremented so decr 3288 * it 3289 */ 3290 SCTP_INP_DECR_REF(inp); 3291 } 3292 } 3293 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3294 } 3295 3296 /* release sctp_inpcb unbind the port */ 3297 void 3298 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3299 { 3300 /* 3301 * Here we free a endpoint. We must find it (if it is in the Hash 3302 * table) and remove it from there. Then we must also find it in the 3303 * overall list and remove it from there. After all removals are 3304 * complete then any timer has to be stopped. Then start the actual 3305 * freeing. a) Any local lists. b) Any associations. c) The hash of 3306 * all associations. d) finally the ep itself. 3307 */ 3308 struct sctp_tcb *asoc, *nasoc; 3309 struct sctp_laddr *laddr, *nladdr; 3310 struct inpcb *ip_pcb; 3311 struct socket *so; 3312 int being_refed = 0; 3313 struct sctp_queued_to_read *sq, *nsq; 3314 int cnt; 3315 sctp_sharedkey_t *shared_key, *nshared_key; 3316 3317 3318 #ifdef SCTP_LOG_CLOSING 3319 sctp_log_closing(inp, NULL, 0); 3320 #endif 3321 SCTP_ITERATOR_LOCK(); 3322 /* mark any iterators on the list or being processed */ 3323 sctp_iterator_inp_being_freed(inp); 3324 SCTP_ITERATOR_UNLOCK(); 3325 so = inp->sctp_socket; 3326 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3327 /* been here before.. eeks.. get out of here */ 3328 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3329 #ifdef SCTP_LOG_CLOSING 3330 sctp_log_closing(inp, NULL, 1); 3331 #endif 3332 return; 3333 } 3334 SCTP_ASOC_CREATE_LOCK(inp); 3335 SCTP_INP_INFO_WLOCK(); 3336 3337 SCTP_INP_WLOCK(inp); 3338 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3339 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3340 /* socket is gone, so no more wakeups allowed */ 3341 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3342 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3343 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3344 3345 } 3346 /* First time through we have the socket lock, after that no more. */ 3347 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3348 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3349 3350 if (inp->control) { 3351 sctp_m_freem(inp->control); 3352 inp->control = NULL; 3353 } 3354 if (inp->pkt) { 3355 sctp_m_freem(inp->pkt); 3356 inp->pkt = NULL; 3357 } 3358 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3359 * here but I will be nice :> (i.e. 3360 * ip_pcb = ep;) */ 3361 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3362 int cnt_in_sd; 3363 3364 cnt_in_sd = 0; 3365 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3366 SCTP_TCB_LOCK(asoc); 3367 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3368 /* Skip guys being freed */ 3369 cnt_in_sd++; 3370 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3371 /* 3372 * Special case - we did not start a 3373 * kill timer on the asoc due to it 3374 * was not closed. So go ahead and 3375 * start it now. 3376 */ 3377 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3378 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3379 } 3380 SCTP_TCB_UNLOCK(asoc); 3381 continue; 3382 } 3383 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3384 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3385 (asoc->asoc.total_output_queue_size == 0)) { 3386 /* 3387 * If we have data in queue, we don't want 3388 * to just free since the app may have done, 3389 * send()/close or connect/send/close. And 3390 * it wants the data to get across first. 3391 */ 3392 /* Just abandon things in the front states */ 3393 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3394 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3395 cnt_in_sd++; 3396 } 3397 continue; 3398 } 3399 /* Disconnect the socket please */ 3400 asoc->sctp_socket = NULL; 3401 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3402 if ((asoc->asoc.size_on_reasm_queue > 0) || 3403 (asoc->asoc.control_pdapi) || 3404 (asoc->asoc.size_on_all_streams > 0) || 3405 (so && (so->so_rcv.sb_cc > 0))) { 3406 /* Left with Data unread */ 3407 struct mbuf *op_err; 3408 3409 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3410 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3411 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3412 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3413 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3414 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3415 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3416 } 3417 if (sctp_free_assoc(inp, asoc, 3418 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3419 cnt_in_sd++; 3420 } 3421 continue; 3422 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3423 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3424 (asoc->asoc.stream_queue_cnt == 0)) { 3425 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3426 goto abort_anyway; 3427 } 3428 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3429 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3430 struct sctp_nets *netp; 3431 3432 /* 3433 * there is nothing queued to send, 3434 * so I send shutdown 3435 */ 3436 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3437 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3438 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3439 } 3440 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3441 sctp_stop_timers_for_shutdown(asoc); 3442 if (asoc->asoc.alternate) { 3443 netp = asoc->asoc.alternate; 3444 } else { 3445 netp = asoc->asoc.primary_destination; 3446 } 3447 sctp_send_shutdown(asoc, netp); 3448 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3449 netp); 3450 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3451 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3452 } 3453 } else { 3454 /* mark into shutdown pending */ 3455 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3456 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3457 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3458 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3459 } 3460 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3461 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3462 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3463 struct mbuf *op_err; 3464 3465 abort_anyway: 3466 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3467 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3468 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3469 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3470 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3471 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3472 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3473 } 3474 if (sctp_free_assoc(inp, asoc, 3475 SCTP_PCBFREE_NOFORCE, 3476 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3477 cnt_in_sd++; 3478 } 3479 continue; 3480 } else { 3481 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3482 } 3483 } 3484 cnt_in_sd++; 3485 SCTP_TCB_UNLOCK(asoc); 3486 } 3487 /* now is there some left in our SHUTDOWN state? */ 3488 if (cnt_in_sd) { 3489 #ifdef SCTP_LOG_CLOSING 3490 sctp_log_closing(inp, NULL, 2); 3491 #endif 3492 inp->sctp_socket = NULL; 3493 SCTP_INP_WUNLOCK(inp); 3494 SCTP_ASOC_CREATE_UNLOCK(inp); 3495 SCTP_INP_INFO_WUNLOCK(); 3496 return; 3497 } 3498 } 3499 inp->sctp_socket = NULL; 3500 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3501 SCTP_PCB_FLAGS_UNBOUND) { 3502 /* 3503 * ok, this guy has been bound. It's port is somewhere in 3504 * the SCTP_BASE_INFO(hash table). Remove it! 3505 */ 3506 LIST_REMOVE(inp, sctp_hash); 3507 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3508 } 3509 3510 /* 3511 * If there is a timer running to kill us, forget it, since it may 3512 * have a contest on the INP lock.. which would cause us to die ... 3513 */ 3514 cnt = 0; 3515 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3516 SCTP_TCB_LOCK(asoc); 3517 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3518 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3519 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3520 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3521 } 3522 cnt++; 3523 SCTP_TCB_UNLOCK(asoc); 3524 continue; 3525 } 3526 /* Free associations that are NOT killing us */ 3527 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3528 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3529 struct mbuf *op_err; 3530 3531 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3532 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3533 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3534 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3535 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3536 cnt++; 3537 SCTP_TCB_UNLOCK(asoc); 3538 continue; 3539 } 3540 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3541 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3542 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3543 } 3544 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3545 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3546 cnt++; 3547 } 3548 } 3549 if (cnt) { 3550 /* Ok we have someone out there that will kill us */ 3551 #ifdef SCTP_LOG_CLOSING 3552 sctp_log_closing(inp, NULL, 3); 3553 #endif 3554 SCTP_INP_WUNLOCK(inp); 3555 SCTP_ASOC_CREATE_UNLOCK(inp); 3556 SCTP_INP_INFO_WUNLOCK(); 3557 return; 3558 } 3559 if (SCTP_INP_LOCK_CONTENDED(inp)) 3560 being_refed++; 3561 if (SCTP_INP_READ_CONTENDED(inp)) 3562 being_refed++; 3563 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3564 being_refed++; 3565 3566 if ((inp->refcount) || 3567 (being_refed) || 3568 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3569 #ifdef SCTP_LOG_CLOSING 3570 sctp_log_closing(inp, NULL, 4); 3571 #endif 3572 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3573 SCTP_INP_WUNLOCK(inp); 3574 SCTP_ASOC_CREATE_UNLOCK(inp); 3575 SCTP_INP_INFO_WUNLOCK(); 3576 return; 3577 } 3578 inp->sctp_ep.signature_change.type = 0; 3579 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3580 /* 3581 * Remove it from the list .. last thing we need a lock for. 3582 */ 3583 LIST_REMOVE(inp, sctp_list); 3584 SCTP_INP_WUNLOCK(inp); 3585 SCTP_ASOC_CREATE_UNLOCK(inp); 3586 SCTP_INP_INFO_WUNLOCK(); 3587 /* 3588 * Now we release all locks. Since this INP cannot be found anymore 3589 * except possibly by the kill timer that might be running. We call 3590 * the drain function here. It should hit the case were it sees the 3591 * ACTIVE flag cleared and exit out freeing us to proceed and 3592 * destroy everything. 3593 */ 3594 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3595 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3596 } else { 3597 /* Probably un-needed */ 3598 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3599 } 3600 3601 #ifdef SCTP_LOG_CLOSING 3602 sctp_log_closing(inp, NULL, 5); 3603 #endif 3604 3605 3606 if ((inp->sctp_asocidhash) != NULL) { 3607 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3608 inp->sctp_asocidhash = NULL; 3609 } 3610 /* sa_ignore FREED_MEMORY */ 3611 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3612 /* Its only abandoned if it had data left */ 3613 if (sq->length) 3614 SCTP_STAT_INCR(sctps_left_abandon); 3615 3616 TAILQ_REMOVE(&inp->read_queue, sq, next); 3617 sctp_free_remote_addr(sq->whoFrom); 3618 if (so) 3619 so->so_rcv.sb_cc -= sq->length; 3620 if (sq->data) { 3621 sctp_m_freem(sq->data); 3622 sq->data = NULL; 3623 } 3624 /* 3625 * no need to free the net count, since at this point all 3626 * assoc's are gone. 3627 */ 3628 sctp_free_a_readq(NULL, sq); 3629 } 3630 /* Now the sctp_pcb things */ 3631 /* 3632 * free each asoc if it is not already closed/free. we can't use the 3633 * macro here since le_next will get freed as part of the 3634 * sctp_free_assoc() call. 3635 */ 3636 if (ip_pcb->inp_options) { 3637 (void)sctp_m_free(ip_pcb->inp_options); 3638 ip_pcb->inp_options = 0; 3639 } 3640 3641 3642 #ifdef INET6 3643 if (ip_pcb->inp_vflag & INP_IPV6) { 3644 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3645 } 3646 #endif /* INET6 */ 3647 ip_pcb->inp_vflag = 0; 3648 /* free up authentication fields */ 3649 if (inp->sctp_ep.local_auth_chunks != NULL) 3650 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3651 if (inp->sctp_ep.local_hmacs != NULL) 3652 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3653 3654 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3655 LIST_REMOVE(shared_key, next); 3656 sctp_free_sharedkey(shared_key); 3657 /* sa_ignore FREED_MEMORY */ 3658 } 3659 3660 /* 3661 * if we have an address list the following will free the list of 3662 * ifaddr's that are set into this ep. Again macro limitations here, 3663 * since the LIST_FOREACH could be a bad idea. 3664 */ 3665 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3666 sctp_remove_laddr(laddr); 3667 } 3668 3669 #ifdef SCTP_TRACK_FREED_ASOCS 3670 /* TEMP CODE */ 3671 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3672 LIST_REMOVE(asoc, sctp_tcblist); 3673 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3674 SCTP_DECR_ASOC_COUNT(); 3675 } 3676 /* *** END TEMP CODE *** */ 3677 #endif 3678 /* Now lets see about freeing the EP hash table. */ 3679 if (inp->sctp_tcbhash != NULL) { 3680 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3681 inp->sctp_tcbhash = NULL; 3682 } 3683 /* Now we must put the ep memory back into the zone pool */ 3684 crfree(inp->ip_inp.inp.inp_cred); 3685 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3686 SCTP_INP_LOCK_DESTROY(inp); 3687 SCTP_INP_READ_DESTROY(inp); 3688 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3689 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3690 SCTP_DECR_EP_COUNT(); 3691 } 3692 3693 3694 struct sctp_nets * 3695 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3696 { 3697 struct sctp_nets *net; 3698 3699 /* locate the address */ 3700 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3701 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3702 return (net); 3703 } 3704 return (NULL); 3705 } 3706 3707 3708 int 3709 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3710 { 3711 struct sctp_ifa *sctp_ifa; 3712 3713 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3714 if (sctp_ifa) { 3715 return (1); 3716 } else { 3717 return (0); 3718 } 3719 } 3720 3721 /* 3722 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3723 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3724 * stats of stuff. 3725 */ 3726 int 3727 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3728 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3729 { 3730 /* 3731 * The following is redundant to the same lines in the 3732 * sctp_aloc_assoc() but is needed since others call the add address 3733 * function 3734 */ 3735 struct sctp_nets *net, *netfirst; 3736 int addr_inscope; 3737 3738 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3739 from); 3740 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3741 3742 netfirst = sctp_findnet(stcb, newaddr); 3743 if (netfirst) { 3744 /* 3745 * Lie and return ok, we don't want to make the association 3746 * go away for this behavior. It will happen in the TCP 3747 * model in a connected socket. It does not reach the hash 3748 * table until after the association is built so it can't be 3749 * found. Mark as reachable, since the initial creation will 3750 * have been cleared and the NOT_IN_ASSOC flag will have 3751 * been added... and we don't want to end up removing it 3752 * back out. 3753 */ 3754 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3755 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3756 SCTP_ADDR_UNCONFIRMED); 3757 } else { 3758 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3759 } 3760 3761 return (0); 3762 } 3763 addr_inscope = 1; 3764 switch (newaddr->sa_family) { 3765 #ifdef INET 3766 case AF_INET: 3767 { 3768 struct sockaddr_in *sin; 3769 3770 sin = (struct sockaddr_in *)newaddr; 3771 if (sin->sin_addr.s_addr == 0) { 3772 /* Invalid address */ 3773 return (-1); 3774 } 3775 /* zero out the zero area */ 3776 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3777 3778 /* assure len is set */ 3779 sin->sin_len = sizeof(struct sockaddr_in); 3780 if (set_scope) { 3781 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3782 stcb->asoc.scope.ipv4_local_scope = 1; 3783 } 3784 } else { 3785 /* Validate the address is in scope */ 3786 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3787 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3788 addr_inscope = 0; 3789 } 3790 } 3791 break; 3792 } 3793 #endif 3794 #ifdef INET6 3795 case AF_INET6: 3796 { 3797 struct sockaddr_in6 *sin6; 3798 3799 sin6 = (struct sockaddr_in6 *)newaddr; 3800 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3801 /* Invalid address */ 3802 return (-1); 3803 } 3804 /* assure len is set */ 3805 sin6->sin6_len = sizeof(struct sockaddr_in6); 3806 if (set_scope) { 3807 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3808 stcb->asoc.scope.loopback_scope = 1; 3809 stcb->asoc.scope.local_scope = 0; 3810 stcb->asoc.scope.ipv4_local_scope = 1; 3811 stcb->asoc.scope.site_scope = 1; 3812 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3813 /* 3814 * If the new destination is a 3815 * LINK_LOCAL we must have common 3816 * site scope. Don't set the local 3817 * scope since we may not share all 3818 * links, only loopback can do this. 3819 * Links on the local network would 3820 * also be on our private network 3821 * for v4 too. 3822 */ 3823 stcb->asoc.scope.ipv4_local_scope = 1; 3824 stcb->asoc.scope.site_scope = 1; 3825 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3826 /* 3827 * If the new destination is 3828 * SITE_LOCAL then we must have site 3829 * scope in common. 3830 */ 3831 stcb->asoc.scope.site_scope = 1; 3832 } 3833 } else { 3834 /* Validate the address is in scope */ 3835 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3836 (stcb->asoc.scope.loopback_scope == 0)) { 3837 addr_inscope = 0; 3838 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3839 (stcb->asoc.scope.local_scope == 0)) { 3840 addr_inscope = 0; 3841 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3842 (stcb->asoc.scope.site_scope == 0)) { 3843 addr_inscope = 0; 3844 } 3845 } 3846 break; 3847 } 3848 #endif 3849 default: 3850 /* not supported family type */ 3851 return (-1); 3852 } 3853 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3854 if (net == NULL) { 3855 return (-1); 3856 } 3857 SCTP_INCR_RADDR_COUNT(); 3858 memset(net, 0, sizeof(struct sctp_nets)); 3859 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3860 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3861 switch (newaddr->sa_family) { 3862 #ifdef INET 3863 case AF_INET: 3864 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3865 break; 3866 #endif 3867 #ifdef INET6 3868 case AF_INET6: 3869 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3870 break; 3871 #endif 3872 default: 3873 break; 3874 } 3875 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3876 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3877 stcb->asoc.scope.loopback_scope = 1; 3878 stcb->asoc.scope.ipv4_local_scope = 1; 3879 stcb->asoc.scope.local_scope = 0; 3880 stcb->asoc.scope.site_scope = 1; 3881 addr_inscope = 1; 3882 } 3883 net->failure_threshold = stcb->asoc.def_net_failure; 3884 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3885 if (addr_inscope == 0) { 3886 net->dest_state = (SCTP_ADDR_REACHABLE | 3887 SCTP_ADDR_OUT_OF_SCOPE); 3888 } else { 3889 if (from == SCTP_ADDR_IS_CONFIRMED) 3890 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3891 net->dest_state = SCTP_ADDR_REACHABLE; 3892 else 3893 net->dest_state = SCTP_ADDR_REACHABLE | 3894 SCTP_ADDR_UNCONFIRMED; 3895 } 3896 /* 3897 * We set this to 0, the timer code knows that this means its an 3898 * initial value 3899 */ 3900 net->rto_needed = 1; 3901 net->RTO = 0; 3902 net->RTO_measured = 0; 3903 stcb->asoc.numnets++; 3904 net->ref_count = 1; 3905 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3906 net->port = port; 3907 net->dscp = stcb->asoc.default_dscp; 3908 #ifdef INET6 3909 net->flowlabel = stcb->asoc.default_flowlabel; 3910 #endif 3911 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3912 net->dest_state |= SCTP_ADDR_NOHB; 3913 } else { 3914 net->dest_state &= ~SCTP_ADDR_NOHB; 3915 } 3916 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3917 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3918 } else { 3919 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3920 } 3921 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3922 /* Init the timer structure */ 3923 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3924 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3925 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3926 3927 /* Now generate a route for this guy */ 3928 #ifdef INET6 3929 /* KAME hack: embed scopeid */ 3930 if (newaddr->sa_family == AF_INET6) { 3931 struct sockaddr_in6 *sin6; 3932 3933 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3934 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3935 sin6->sin6_scope_id = 0; 3936 } 3937 #endif 3938 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3939 stcb->asoc.vrf_id, 3940 stcb->sctp_ep->fibnum); 3941 3942 net->src_addr_selected = 0; 3943 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3944 /* Get source address */ 3945 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3946 stcb, 3947 (sctp_route_t *)&net->ro, 3948 net, 3949 0, 3950 stcb->asoc.vrf_id); 3951 if (stcb->asoc.default_mtu > 0) { 3952 net->mtu = stcb->asoc.default_mtu; 3953 switch (net->ro._l_addr.sa.sa_family) { 3954 #ifdef INET 3955 case AF_INET: 3956 net->mtu += SCTP_MIN_V4_OVERHEAD; 3957 break; 3958 #endif 3959 #ifdef INET6 3960 case AF_INET6: 3961 net->mtu += SCTP_MIN_OVERHEAD; 3962 break; 3963 #endif 3964 default: 3965 break; 3966 } 3967 #if defined(INET) || defined(INET6) 3968 if (net->port) { 3969 net->mtu += (uint32_t)sizeof(struct udphdr); 3970 } 3971 #endif 3972 } else if (net->ro._s_addr != NULL) { 3973 uint32_t imtu, rmtu, hcmtu; 3974 3975 net->src_addr_selected = 1; 3976 /* Now get the interface MTU */ 3977 if (net->ro._s_addr->ifn_p != NULL) { 3978 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3979 } else { 3980 imtu = 0; 3981 } 3982 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 3983 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3984 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3985 } 3986 } 3987 if (net->mtu == 0) { 3988 if (stcb->asoc.default_mtu > 0) { 3989 net->mtu = stcb->asoc.default_mtu; 3990 switch (net->ro._l_addr.sa.sa_family) { 3991 #ifdef INET 3992 case AF_INET: 3993 net->mtu += SCTP_MIN_V4_OVERHEAD; 3994 break; 3995 #endif 3996 #ifdef INET6 3997 case AF_INET6: 3998 net->mtu += SCTP_MIN_OVERHEAD; 3999 break; 4000 #endif 4001 default: 4002 break; 4003 } 4004 #if defined(INET) || defined(INET6) 4005 if (net->port) { 4006 net->mtu += (uint32_t)sizeof(struct udphdr); 4007 } 4008 #endif 4009 } else { 4010 switch (newaddr->sa_family) { 4011 #ifdef INET 4012 case AF_INET: 4013 net->mtu = SCTP_DEFAULT_MTU; 4014 break; 4015 #endif 4016 #ifdef INET6 4017 case AF_INET6: 4018 net->mtu = 1280; 4019 break; 4020 #endif 4021 default: 4022 break; 4023 } 4024 } 4025 } 4026 #if defined(INET) || defined(INET6) 4027 if (net->port) { 4028 net->mtu -= (uint32_t)sizeof(struct udphdr); 4029 } 4030 #endif 4031 if (from == SCTP_ALLOC_ASOC) { 4032 stcb->asoc.smallest_mtu = net->mtu; 4033 } 4034 if (stcb->asoc.smallest_mtu > net->mtu) { 4035 sctp_pathmtu_adjustment(stcb, net->mtu); 4036 } 4037 #ifdef INET6 4038 if (newaddr->sa_family == AF_INET6) { 4039 struct sockaddr_in6 *sin6; 4040 4041 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4042 (void)sa6_recoverscope(sin6); 4043 } 4044 #endif 4045 4046 /* JRS - Use the congestion control given in the CC module */ 4047 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4048 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4049 4050 /* 4051 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4052 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4053 */ 4054 net->find_pseudo_cumack = 1; 4055 net->find_rtx_pseudo_cumack = 1; 4056 /* Choose an initial flowid. */ 4057 net->flowid = stcb->asoc.my_vtag ^ 4058 ntohs(stcb->rport) ^ 4059 ntohs(stcb->sctp_ep->sctp_lport); 4060 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4061 if (netp) { 4062 *netp = net; 4063 } 4064 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4065 if (net->ro.ro_nh == NULL) { 4066 /* Since we have no route put it at the back */ 4067 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4068 } else if (netfirst == NULL) { 4069 /* We are the first one in the pool. */ 4070 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4071 } else if (netfirst->ro.ro_nh == NULL) { 4072 /* 4073 * First one has NO route. Place this one ahead of the first 4074 * one. 4075 */ 4076 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4077 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4078 /* 4079 * This one has a different interface than the one at the 4080 * top of the list. Place it ahead. 4081 */ 4082 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4083 } else { 4084 /* 4085 * Ok we have the same interface as the first one. Move 4086 * forward until we find either a) one with a NULL route... 4087 * insert ahead of that b) one with a different ifp.. insert 4088 * after that. c) end of the list.. insert at the tail. 4089 */ 4090 struct sctp_nets *netlook; 4091 4092 do { 4093 netlook = TAILQ_NEXT(netfirst, sctp_next); 4094 if (netlook == NULL) { 4095 /* End of the list */ 4096 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4097 break; 4098 } else if (netlook->ro.ro_nh == NULL) { 4099 /* next one has NO route */ 4100 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4101 break; 4102 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4103 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4104 net, sctp_next); 4105 break; 4106 } 4107 /* Shift forward */ 4108 netfirst = netlook; 4109 } while (netlook != NULL); 4110 } 4111 4112 /* got to have a primary set */ 4113 if (stcb->asoc.primary_destination == 0) { 4114 stcb->asoc.primary_destination = net; 4115 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4116 (net->ro.ro_nh) && 4117 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4118 /* No route to current primary adopt new primary */ 4119 stcb->asoc.primary_destination = net; 4120 } 4121 /* Validate primary is first */ 4122 net = TAILQ_FIRST(&stcb->asoc.nets); 4123 if ((net != stcb->asoc.primary_destination) && 4124 (stcb->asoc.primary_destination)) { 4125 /* 4126 * first one on the list is NOT the primary sctp_cmpaddr() 4127 * is much more efficient if the primary is the first on the 4128 * list, make it so. 4129 */ 4130 TAILQ_REMOVE(&stcb->asoc.nets, 4131 stcb->asoc.primary_destination, sctp_next); 4132 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4133 stcb->asoc.primary_destination, sctp_next); 4134 } 4135 return (0); 4136 } 4137 4138 4139 static uint32_t 4140 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4141 { 4142 uint32_t id; 4143 struct sctpasochead *head; 4144 struct sctp_tcb *lstcb; 4145 4146 try_again: 4147 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4148 /* TSNH */ 4149 return (0); 4150 } 4151 /* 4152 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4153 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4154 */ 4155 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4156 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4157 } 4158 id = inp->sctp_associd_counter; 4159 inp->sctp_associd_counter++; 4160 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4161 if (lstcb) { 4162 goto try_again; 4163 } 4164 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4165 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4166 stcb->asoc.in_asocid_hash = 1; 4167 return (id); 4168 } 4169 4170 /* 4171 * allocate an association and add it to the endpoint. The caller must be 4172 * careful to add all additional addresses once they are know right away or 4173 * else the assoc will be may experience a blackout scenario. 4174 */ 4175 struct sctp_tcb * 4176 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4177 int *error, uint32_t override_tag, uint32_t vrf_id, 4178 uint16_t o_streams, uint16_t port, 4179 struct thread *p, 4180 int initialize_auth_params) 4181 { 4182 /* note the p argument is only valid in unbound sockets */ 4183 4184 struct sctp_tcb *stcb; 4185 struct sctp_association *asoc; 4186 struct sctpasochead *head; 4187 uint16_t rport; 4188 int err; 4189 4190 /* 4191 * Assumption made here: Caller has done a 4192 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4193 * address does not exist already. 4194 */ 4195 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4196 /* Hit max assoc, sorry no more */ 4197 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4198 *error = ENOBUFS; 4199 return (NULL); 4200 } 4201 if (firstaddr == NULL) { 4202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4203 *error = EINVAL; 4204 return (NULL); 4205 } 4206 SCTP_INP_RLOCK(inp); 4207 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4208 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4209 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4210 /* 4211 * If its in the TCP pool, its NOT allowed to create an 4212 * association. The parent listener needs to call 4213 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4214 * off, or connected one does this.. its an error. 4215 */ 4216 SCTP_INP_RUNLOCK(inp); 4217 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4218 *error = EINVAL; 4219 return (NULL); 4220 } 4221 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4222 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4223 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4224 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4225 SCTP_INP_RUNLOCK(inp); 4226 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4227 *error = EINVAL; 4228 return (NULL); 4229 } 4230 } 4231 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4232 #ifdef SCTP_DEBUG 4233 if (firstaddr) { 4234 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4235 switch (firstaddr->sa_family) { 4236 #ifdef INET 4237 case AF_INET: 4238 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4239 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4240 break; 4241 #endif 4242 #ifdef INET6 4243 case AF_INET6: 4244 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4245 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4246 break; 4247 #endif 4248 default: 4249 break; 4250 } 4251 } else { 4252 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4253 } 4254 #endif /* SCTP_DEBUG */ 4255 switch (firstaddr->sa_family) { 4256 #ifdef INET 4257 case AF_INET: 4258 { 4259 struct sockaddr_in *sin; 4260 4261 sin = (struct sockaddr_in *)firstaddr; 4262 if ((ntohs(sin->sin_port) == 0) || 4263 (sin->sin_addr.s_addr == INADDR_ANY) || 4264 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4265 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4266 /* Invalid address */ 4267 SCTP_INP_RUNLOCK(inp); 4268 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4269 *error = EINVAL; 4270 return (NULL); 4271 } 4272 rport = sin->sin_port; 4273 break; 4274 } 4275 #endif 4276 #ifdef INET6 4277 case AF_INET6: 4278 { 4279 struct sockaddr_in6 *sin6; 4280 4281 sin6 = (struct sockaddr_in6 *)firstaddr; 4282 if ((ntohs(sin6->sin6_port) == 0) || 4283 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4284 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4285 /* Invalid address */ 4286 SCTP_INP_RUNLOCK(inp); 4287 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4288 *error = EINVAL; 4289 return (NULL); 4290 } 4291 rport = sin6->sin6_port; 4292 break; 4293 } 4294 #endif 4295 default: 4296 /* not supported family type */ 4297 SCTP_INP_RUNLOCK(inp); 4298 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4299 *error = EINVAL; 4300 return (NULL); 4301 } 4302 SCTP_INP_RUNLOCK(inp); 4303 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4304 /* 4305 * If you have not performed a bind, then we need to do the 4306 * ephemeral bind for you. 4307 */ 4308 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) { 4309 /* bind error, probably perm */ 4310 *error = err; 4311 return (NULL); 4312 } 4313 } 4314 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4315 if (stcb == NULL) { 4316 /* out of memory? */ 4317 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4318 *error = ENOMEM; 4319 return (NULL); 4320 } 4321 SCTP_INCR_ASOC_COUNT(); 4322 4323 memset(stcb, 0, sizeof(*stcb)); 4324 asoc = &stcb->asoc; 4325 4326 SCTP_TCB_LOCK_INIT(stcb); 4327 SCTP_TCB_SEND_LOCK_INIT(stcb); 4328 stcb->rport = rport; 4329 /* setup back pointer's */ 4330 stcb->sctp_ep = inp; 4331 stcb->sctp_socket = inp->sctp_socket; 4332 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4333 /* failed */ 4334 SCTP_TCB_LOCK_DESTROY(stcb); 4335 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4336 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4337 SCTP_DECR_ASOC_COUNT(); 4338 *error = err; 4339 return (NULL); 4340 } 4341 /* and the port */ 4342 SCTP_INP_INFO_WLOCK(); 4343 SCTP_INP_WLOCK(inp); 4344 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4345 /* inpcb freed while alloc going on */ 4346 SCTP_TCB_LOCK_DESTROY(stcb); 4347 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4348 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4349 SCTP_INP_WUNLOCK(inp); 4350 SCTP_INP_INFO_WUNLOCK(); 4351 SCTP_DECR_ASOC_COUNT(); 4352 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4353 *error = EINVAL; 4354 return (NULL); 4355 } 4356 SCTP_TCB_LOCK(stcb); 4357 4358 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4359 /* now that my_vtag is set, add it to the hash */ 4360 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4361 /* put it in the bucket in the vtag hash of assoc's for the system */ 4362 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4363 SCTP_INP_INFO_WUNLOCK(); 4364 4365 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4366 /* failure.. memory error? */ 4367 if (asoc->strmout) { 4368 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4369 asoc->strmout = NULL; 4370 } 4371 if (asoc->mapping_array) { 4372 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4373 asoc->mapping_array = NULL; 4374 } 4375 if (asoc->nr_mapping_array) { 4376 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4377 asoc->nr_mapping_array = NULL; 4378 } 4379 SCTP_DECR_ASOC_COUNT(); 4380 SCTP_TCB_UNLOCK(stcb); 4381 SCTP_TCB_LOCK_DESTROY(stcb); 4382 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4383 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4384 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4385 SCTP_INP_WUNLOCK(inp); 4386 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4387 *error = ENOBUFS; 4388 return (NULL); 4389 } 4390 /* Init all the timers */ 4391 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4392 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4393 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4394 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4395 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4396 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4397 4398 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4399 /* now file the port under the hash as well */ 4400 if (inp->sctp_tcbhash != NULL) { 4401 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4402 inp->sctp_hashmark)]; 4403 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4404 } 4405 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4406 sctp_initialize_auth_params(inp, stcb); 4407 } 4408 SCTP_INP_WUNLOCK(inp); 4409 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4410 return (stcb); 4411 } 4412 4413 4414 void 4415 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4416 { 4417 struct sctp_inpcb *inp; 4418 struct sctp_association *asoc; 4419 4420 inp = stcb->sctp_ep; 4421 asoc = &stcb->asoc; 4422 asoc->numnets--; 4423 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4424 if (net == asoc->primary_destination) { 4425 /* Reset primary */ 4426 struct sctp_nets *lnet; 4427 4428 lnet = TAILQ_FIRST(&asoc->nets); 4429 /* 4430 * Mobility adaptation Ideally, if deleted destination is 4431 * the primary, it becomes a fast retransmission trigger by 4432 * the subsequent SET PRIMARY. (by micchie) 4433 */ 4434 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4435 SCTP_MOBILITY_BASE) || 4436 sctp_is_mobility_feature_on(stcb->sctp_ep, 4437 SCTP_MOBILITY_FASTHANDOFF)) { 4438 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4439 if (asoc->deleted_primary != NULL) { 4440 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4441 goto out; 4442 } 4443 asoc->deleted_primary = net; 4444 atomic_add_int(&net->ref_count, 1); 4445 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4446 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4447 sctp_mobility_feature_on(stcb->sctp_ep, 4448 SCTP_MOBILITY_PRIM_DELETED); 4449 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4450 stcb->sctp_ep, stcb, NULL); 4451 } 4452 out: 4453 /* Try to find a confirmed primary */ 4454 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4455 } 4456 if (net == asoc->last_data_chunk_from) { 4457 /* Reset primary */ 4458 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4459 } 4460 if (net == asoc->last_control_chunk_from) { 4461 /* Clear net */ 4462 asoc->last_control_chunk_from = NULL; 4463 } 4464 if (net == stcb->asoc.alternate) { 4465 sctp_free_remote_addr(stcb->asoc.alternate); 4466 stcb->asoc.alternate = NULL; 4467 } 4468 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4469 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4470 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4471 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4472 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4473 sctp_free_remote_addr(net); 4474 } 4475 4476 /* 4477 * remove a remote endpoint address from an association, it will fail if the 4478 * address does not exist. 4479 */ 4480 int 4481 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4482 { 4483 /* 4484 * Here we need to remove a remote address. This is quite simple, we 4485 * first find it in the list of address for the association 4486 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4487 * on that item. Note we do not allow it to be removed if there are 4488 * no other addresses. 4489 */ 4490 struct sctp_association *asoc; 4491 struct sctp_nets *net, *nnet; 4492 4493 asoc = &stcb->asoc; 4494 4495 /* locate the address */ 4496 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4497 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4498 continue; 4499 } 4500 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4501 remaddr)) { 4502 /* we found the guy */ 4503 if (asoc->numnets < 2) { 4504 /* Must have at LEAST two remote addresses */ 4505 return (-1); 4506 } else { 4507 sctp_remove_net(stcb, net); 4508 return (0); 4509 } 4510 } 4511 } 4512 /* not found. */ 4513 return (-2); 4514 } 4515 4516 void 4517 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4518 { 4519 struct sctpvtaghead *chain; 4520 struct sctp_tagblock *twait_block; 4521 int found = 0; 4522 int i; 4523 4524 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4525 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4526 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4527 if ((twait_block->vtag_block[i].v_tag == tag) && 4528 (twait_block->vtag_block[i].lport == lport) && 4529 (twait_block->vtag_block[i].rport == rport)) { 4530 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4531 twait_block->vtag_block[i].v_tag = 0; 4532 twait_block->vtag_block[i].lport = 0; 4533 twait_block->vtag_block[i].rport = 0; 4534 found = 1; 4535 break; 4536 } 4537 } 4538 if (found) 4539 break; 4540 } 4541 } 4542 4543 int 4544 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4545 { 4546 struct sctpvtaghead *chain; 4547 struct sctp_tagblock *twait_block; 4548 int found = 0; 4549 int i; 4550 4551 SCTP_INP_INFO_WLOCK(); 4552 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4553 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4554 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4555 if ((twait_block->vtag_block[i].v_tag == tag) && 4556 (twait_block->vtag_block[i].lport == lport) && 4557 (twait_block->vtag_block[i].rport == rport)) { 4558 found = 1; 4559 break; 4560 } 4561 } 4562 if (found) 4563 break; 4564 } 4565 SCTP_INP_INFO_WUNLOCK(); 4566 return (found); 4567 } 4568 4569 4570 void 4571 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4572 { 4573 struct sctpvtaghead *chain; 4574 struct sctp_tagblock *twait_block; 4575 struct timeval now; 4576 int set, i; 4577 4578 if (time == 0) { 4579 /* Its disabled */ 4580 return; 4581 } 4582 (void)SCTP_GETTIME_TIMEVAL(&now); 4583 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4584 set = 0; 4585 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4586 /* Block(s) present, lets find space, and expire on the fly */ 4587 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4588 if ((twait_block->vtag_block[i].v_tag == 0) && 4589 !set) { 4590 twait_block->vtag_block[i].tv_sec_at_expire = 4591 now.tv_sec + time; 4592 twait_block->vtag_block[i].v_tag = tag; 4593 twait_block->vtag_block[i].lport = lport; 4594 twait_block->vtag_block[i].rport = rport; 4595 set = 1; 4596 } else if ((twait_block->vtag_block[i].v_tag) && 4597 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4598 /* Audit expires this guy */ 4599 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4600 twait_block->vtag_block[i].v_tag = 0; 4601 twait_block->vtag_block[i].lport = 0; 4602 twait_block->vtag_block[i].rport = 0; 4603 if (set == 0) { 4604 /* Reuse it for my new tag */ 4605 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4606 twait_block->vtag_block[i].v_tag = tag; 4607 twait_block->vtag_block[i].lport = lport; 4608 twait_block->vtag_block[i].rport = rport; 4609 set = 1; 4610 } 4611 } 4612 } 4613 if (set) { 4614 /* 4615 * We only do up to the block where we can place our 4616 * tag for audits 4617 */ 4618 break; 4619 } 4620 } 4621 /* Need to add a new block to chain */ 4622 if (!set) { 4623 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4624 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4625 if (twait_block == NULL) { 4626 return; 4627 } 4628 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4629 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4630 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4631 twait_block->vtag_block[0].v_tag = tag; 4632 twait_block->vtag_block[0].lport = lport; 4633 twait_block->vtag_block[0].rport = rport; 4634 } 4635 } 4636 4637 void 4638 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4639 { 4640 struct sctp_tmit_chunk *chk, *nchk; 4641 struct sctp_queued_to_read *control, *ncontrol; 4642 4643 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4644 TAILQ_REMOVE(rh, control, next_instrm); 4645 control->on_strm_q = 0; 4646 if (control->on_read_q == 0) { 4647 sctp_free_remote_addr(control->whoFrom); 4648 if (control->data) { 4649 sctp_m_freem(control->data); 4650 control->data = NULL; 4651 } 4652 } 4653 /* Reassembly free? */ 4654 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4655 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4656 if (chk->data) { 4657 sctp_m_freem(chk->data); 4658 chk->data = NULL; 4659 } 4660 if (chk->holds_key_ref) 4661 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4662 sctp_free_remote_addr(chk->whoTo); 4663 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4664 SCTP_DECR_CHK_COUNT(); 4665 /* sa_ignore FREED_MEMORY */ 4666 } 4667 /* 4668 * We don't free the address here since all the net's were 4669 * freed above. 4670 */ 4671 if (control->on_read_q == 0) { 4672 sctp_free_a_readq(stcb, control); 4673 } 4674 } 4675 } 4676 4677 /*- 4678 * Free the association after un-hashing the remote port. This 4679 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4680 * expect that the input to this function IS a locked TCB. 4681 * It will return 0, if it did NOT destroy the association (instead 4682 * it unlocks it. It will return NON-zero if it either destroyed the 4683 * association OR the association is already destroyed. 4684 */ 4685 int 4686 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4687 { 4688 int i; 4689 struct sctp_association *asoc; 4690 struct sctp_nets *net, *nnet; 4691 struct sctp_laddr *laddr, *naddr; 4692 struct sctp_tmit_chunk *chk, *nchk; 4693 struct sctp_asconf_addr *aparam, *naparam; 4694 struct sctp_asconf_ack *aack, *naack; 4695 struct sctp_stream_reset_list *strrst, *nstrrst; 4696 struct sctp_queued_to_read *sq, *nsq; 4697 struct sctp_stream_queue_pending *sp, *nsp; 4698 sctp_sharedkey_t *shared_key, *nshared_key; 4699 struct socket *so; 4700 4701 /* first, lets purge the entry from the hash table. */ 4702 4703 #ifdef SCTP_LOG_CLOSING 4704 sctp_log_closing(inp, stcb, 6); 4705 #endif 4706 if (stcb->asoc.state == 0) { 4707 #ifdef SCTP_LOG_CLOSING 4708 sctp_log_closing(inp, NULL, 7); 4709 #endif 4710 /* there is no asoc, really TSNH :-0 */ 4711 return (1); 4712 } 4713 if (stcb->asoc.alternate) { 4714 sctp_free_remote_addr(stcb->asoc.alternate); 4715 stcb->asoc.alternate = NULL; 4716 } 4717 /* TEMP CODE */ 4718 if (stcb->freed_from_where == 0) { 4719 /* Only record the first place free happened from */ 4720 stcb->freed_from_where = from_location; 4721 } 4722 /* TEMP CODE */ 4723 4724 asoc = &stcb->asoc; 4725 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4726 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4727 /* nothing around */ 4728 so = NULL; 4729 else 4730 so = inp->sctp_socket; 4731 4732 /* 4733 * We used timer based freeing if a reader or writer is in the way. 4734 * So we first check if we are actually being called from a timer, 4735 * if so we abort early if a reader or writer is still in the way. 4736 */ 4737 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4738 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4739 /* 4740 * is it the timer driving us? if so are the reader/writers 4741 * gone? 4742 */ 4743 if (stcb->asoc.refcnt) { 4744 /* nope, reader or writer in the way */ 4745 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4746 /* no asoc destroyed */ 4747 SCTP_TCB_UNLOCK(stcb); 4748 #ifdef SCTP_LOG_CLOSING 4749 sctp_log_closing(inp, stcb, 8); 4750 #endif 4751 return (0); 4752 } 4753 } 4754 /* Now clean up any other timers */ 4755 sctp_stop_association_timers(stcb, false); 4756 /* Now the read queue needs to be cleaned up (only once) */ 4757 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4758 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4759 SCTP_INP_READ_LOCK(inp); 4760 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4761 if (sq->stcb == stcb) { 4762 sq->do_not_ref_stcb = 1; 4763 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4764 /* 4765 * If there is no end, there never will be 4766 * now. 4767 */ 4768 if (sq->end_added == 0) { 4769 /* Held for PD-API clear that. */ 4770 sq->pdapi_aborted = 1; 4771 sq->held_length = 0; 4772 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4773 /* 4774 * Need to add a PD-API 4775 * aborted indication. 4776 * Setting the control_pdapi 4777 * assures that it will be 4778 * added right after this 4779 * msg. 4780 */ 4781 uint32_t strseq; 4782 4783 stcb->asoc.control_pdapi = sq; 4784 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4785 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4786 stcb, 4787 SCTP_PARTIAL_DELIVERY_ABORTED, 4788 (void *)&strseq, 4789 SCTP_SO_LOCKED); 4790 stcb->asoc.control_pdapi = NULL; 4791 } 4792 } 4793 /* Add an end to wake them */ 4794 sq->end_added = 1; 4795 } 4796 } 4797 SCTP_INP_READ_UNLOCK(inp); 4798 if (stcb->block_entry) { 4799 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4800 stcb->block_entry->error = ECONNRESET; 4801 stcb->block_entry = NULL; 4802 } 4803 } 4804 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4805 /* 4806 * Someone holds a reference OR the socket is unaccepted 4807 * yet. 4808 */ 4809 if ((stcb->asoc.refcnt) || 4810 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4811 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4812 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4813 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4814 } 4815 SCTP_TCB_UNLOCK(stcb); 4816 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4817 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4818 /* nothing around */ 4819 so = NULL; 4820 if (so) { 4821 /* Wake any reader/writers */ 4822 sctp_sorwakeup(inp, so); 4823 sctp_sowwakeup(inp, so); 4824 } 4825 4826 #ifdef SCTP_LOG_CLOSING 4827 sctp_log_closing(inp, stcb, 9); 4828 #endif 4829 /* no asoc destroyed */ 4830 return (0); 4831 } 4832 #ifdef SCTP_LOG_CLOSING 4833 sctp_log_closing(inp, stcb, 10); 4834 #endif 4835 /* 4836 * When I reach here, no others want to kill the assoc yet.. and I 4837 * own the lock. Now its possible an abort comes in when I do the 4838 * lock exchange below to grab all the locks to do the final take 4839 * out. to prevent this we increment the count, which will start a 4840 * timer and blow out above thus assuring us that we hold exclusive 4841 * killing of the asoc. Note that after getting back the TCB lock we 4842 * will go ahead and increment the counter back up and stop any 4843 * timer a passing stranger may have started :-S 4844 */ 4845 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4846 atomic_add_int(&stcb->asoc.refcnt, 1); 4847 4848 SCTP_TCB_UNLOCK(stcb); 4849 SCTP_INP_INFO_WLOCK(); 4850 SCTP_INP_WLOCK(inp); 4851 SCTP_TCB_LOCK(stcb); 4852 } 4853 /* Double check the GONE flag */ 4854 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4855 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4856 /* nothing around */ 4857 so = NULL; 4858 4859 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4860 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4861 /* 4862 * For TCP type we need special handling when we are 4863 * connected. We also include the peel'ed off ones to. 4864 */ 4865 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4866 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4867 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4868 if (so) { 4869 SOCKBUF_LOCK(&so->so_rcv); 4870 so->so_state &= ~(SS_ISCONNECTING | 4871 SS_ISDISCONNECTING | 4872 SS_ISCONFIRMING | 4873 SS_ISCONNECTED); 4874 so->so_state |= SS_ISDISCONNECTED; 4875 socantrcvmore_locked(so); 4876 socantsendmore(so); 4877 sctp_sowwakeup(inp, so); 4878 sctp_sorwakeup(inp, so); 4879 SCTP_SOWAKEUP(so); 4880 } 4881 } 4882 } 4883 4884 /* 4885 * Make it invalid too, that way if its about to run it will abort 4886 * and return. 4887 */ 4888 /* re-increment the lock */ 4889 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4890 atomic_add_int(&stcb->asoc.refcnt, -1); 4891 } 4892 if (stcb->asoc.refcnt) { 4893 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4894 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4895 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4896 SCTP_INP_INFO_WUNLOCK(); 4897 SCTP_INP_WUNLOCK(inp); 4898 } 4899 SCTP_TCB_UNLOCK(stcb); 4900 return (0); 4901 } 4902 asoc->state = 0; 4903 if (inp->sctp_tcbhash) { 4904 LIST_REMOVE(stcb, sctp_tcbhash); 4905 } 4906 if (stcb->asoc.in_asocid_hash) { 4907 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4908 } 4909 /* Now lets remove it from the list of ALL associations in the EP */ 4910 LIST_REMOVE(stcb, sctp_tcblist); 4911 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4912 SCTP_INP_INCR_REF(inp); 4913 SCTP_INP_WUNLOCK(inp); 4914 } 4915 /* pull from vtag hash */ 4916 LIST_REMOVE(stcb, sctp_asocs); 4917 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4918 inp->sctp_lport, stcb->rport); 4919 4920 /* 4921 * Now restop the timers to be sure this is paranoia at is finest! 4922 */ 4923 sctp_stop_association_timers(stcb, true); 4924 4925 /* 4926 * The chunk lists and such SHOULD be empty but we check them just 4927 * in case. 4928 */ 4929 /* anything on the wheel needs to be removed */ 4930 SCTP_TCB_SEND_LOCK(stcb); 4931 for (i = 0; i < asoc->streamoutcnt; i++) { 4932 struct sctp_stream_out *outs; 4933 4934 outs = &asoc->strmout[i]; 4935 /* now clean up any chunks here */ 4936 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4937 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4938 TAILQ_REMOVE(&outs->outqueue, sp, next); 4939 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1); 4940 sctp_free_spbufspace(stcb, asoc, sp); 4941 if (sp->data) { 4942 if (so) { 4943 /* Still an open socket - report */ 4944 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4945 0, (void *)sp, SCTP_SO_LOCKED); 4946 } 4947 if (sp->data) { 4948 sctp_m_freem(sp->data); 4949 sp->data = NULL; 4950 sp->tail_mbuf = NULL; 4951 sp->length = 0; 4952 } 4953 } 4954 if (sp->net) { 4955 sctp_free_remote_addr(sp->net); 4956 sp->net = NULL; 4957 } 4958 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4959 } 4960 } 4961 SCTP_TCB_SEND_UNLOCK(stcb); 4962 /* sa_ignore FREED_MEMORY */ 4963 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4964 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4965 SCTP_FREE(strrst, SCTP_M_STRESET); 4966 } 4967 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4968 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4969 if (sq->data) { 4970 sctp_m_freem(sq->data); 4971 sq->data = NULL; 4972 } 4973 sctp_free_remote_addr(sq->whoFrom); 4974 sq->whoFrom = NULL; 4975 sq->stcb = NULL; 4976 /* Free the ctl entry */ 4977 sctp_free_a_readq(stcb, sq); 4978 /* sa_ignore FREED_MEMORY */ 4979 } 4980 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4981 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4982 if (chk->data) { 4983 sctp_m_freem(chk->data); 4984 chk->data = NULL; 4985 } 4986 if (chk->holds_key_ref) 4987 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4988 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4989 SCTP_DECR_CHK_COUNT(); 4990 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4991 asoc->free_chunk_cnt--; 4992 /* sa_ignore FREED_MEMORY */ 4993 } 4994 /* pending send queue SHOULD be empty */ 4995 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4996 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 4997 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 4998 #ifdef INVARIANTS 4999 } else { 5000 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5001 #endif 5002 } 5003 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5004 if (chk->data) { 5005 if (so) { 5006 /* Still a socket? */ 5007 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5008 0, chk, SCTP_SO_LOCKED); 5009 } 5010 if (chk->data) { 5011 sctp_m_freem(chk->data); 5012 chk->data = NULL; 5013 } 5014 } 5015 if (chk->holds_key_ref) 5016 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5017 if (chk->whoTo) { 5018 sctp_free_remote_addr(chk->whoTo); 5019 chk->whoTo = NULL; 5020 } 5021 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5022 SCTP_DECR_CHK_COUNT(); 5023 /* sa_ignore FREED_MEMORY */ 5024 } 5025 /* sent queue SHOULD be empty */ 5026 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5027 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5028 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5029 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5030 #ifdef INVARIANTS 5031 } else { 5032 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5033 #endif 5034 } 5035 } 5036 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5037 if (chk->data) { 5038 if (so) { 5039 /* Still a socket? */ 5040 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5041 0, chk, SCTP_SO_LOCKED); 5042 } 5043 if (chk->data) { 5044 sctp_m_freem(chk->data); 5045 chk->data = NULL; 5046 } 5047 } 5048 if (chk->holds_key_ref) 5049 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5050 sctp_free_remote_addr(chk->whoTo); 5051 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5052 SCTP_DECR_CHK_COUNT(); 5053 /* sa_ignore FREED_MEMORY */ 5054 } 5055 #ifdef INVARIANTS 5056 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5057 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5058 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5059 } 5060 } 5061 #endif 5062 /* control queue MAY not be empty */ 5063 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5064 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5065 if (chk->data) { 5066 sctp_m_freem(chk->data); 5067 chk->data = NULL; 5068 } 5069 if (chk->holds_key_ref) 5070 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5071 sctp_free_remote_addr(chk->whoTo); 5072 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5073 SCTP_DECR_CHK_COUNT(); 5074 /* sa_ignore FREED_MEMORY */ 5075 } 5076 /* ASCONF queue MAY not be empty */ 5077 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5078 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5079 if (chk->data) { 5080 sctp_m_freem(chk->data); 5081 chk->data = NULL; 5082 } 5083 if (chk->holds_key_ref) 5084 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5085 sctp_free_remote_addr(chk->whoTo); 5086 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5087 SCTP_DECR_CHK_COUNT(); 5088 /* sa_ignore FREED_MEMORY */ 5089 } 5090 if (asoc->mapping_array) { 5091 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5092 asoc->mapping_array = NULL; 5093 } 5094 if (asoc->nr_mapping_array) { 5095 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5096 asoc->nr_mapping_array = NULL; 5097 } 5098 /* the stream outs */ 5099 if (asoc->strmout) { 5100 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5101 asoc->strmout = NULL; 5102 } 5103 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5104 if (asoc->strmin) { 5105 for (i = 0; i < asoc->streamincnt; i++) { 5106 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5107 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5108 } 5109 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5110 asoc->strmin = NULL; 5111 } 5112 asoc->streamincnt = 0; 5113 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5114 #ifdef INVARIANTS 5115 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5116 panic("no net's left alloc'ed, or list points to itself"); 5117 } 5118 #endif 5119 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5120 sctp_free_remote_addr(net); 5121 } 5122 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5123 /* sa_ignore FREED_MEMORY */ 5124 sctp_remove_laddr(laddr); 5125 } 5126 5127 /* pending asconf (address) parameters */ 5128 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5129 /* sa_ignore FREED_MEMORY */ 5130 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5131 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5132 } 5133 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5134 /* sa_ignore FREED_MEMORY */ 5135 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5136 if (aack->data != NULL) { 5137 sctp_m_freem(aack->data); 5138 } 5139 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5140 } 5141 /* clean up auth stuff */ 5142 if (asoc->local_hmacs) 5143 sctp_free_hmaclist(asoc->local_hmacs); 5144 if (asoc->peer_hmacs) 5145 sctp_free_hmaclist(asoc->peer_hmacs); 5146 5147 if (asoc->local_auth_chunks) 5148 sctp_free_chunklist(asoc->local_auth_chunks); 5149 if (asoc->peer_auth_chunks) 5150 sctp_free_chunklist(asoc->peer_auth_chunks); 5151 5152 sctp_free_authinfo(&asoc->authinfo); 5153 5154 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5155 LIST_REMOVE(shared_key, next); 5156 sctp_free_sharedkey(shared_key); 5157 /* sa_ignore FREED_MEMORY */ 5158 } 5159 5160 /* Insert new items here :> */ 5161 5162 /* Get rid of LOCK */ 5163 SCTP_TCB_UNLOCK(stcb); 5164 SCTP_TCB_LOCK_DESTROY(stcb); 5165 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5166 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5167 SCTP_INP_INFO_WUNLOCK(); 5168 SCTP_INP_RLOCK(inp); 5169 } 5170 #ifdef SCTP_TRACK_FREED_ASOCS 5171 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5172 /* now clean up the tasoc itself */ 5173 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5174 SCTP_DECR_ASOC_COUNT(); 5175 } else { 5176 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5177 } 5178 #else 5179 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5180 SCTP_DECR_ASOC_COUNT(); 5181 #endif 5182 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5183 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5184 /* 5185 * If its NOT the inp_free calling us AND sctp_close 5186 * as been called, we call back... 5187 */ 5188 SCTP_INP_RUNLOCK(inp); 5189 /* 5190 * This will start the kill timer (if we are the 5191 * last one) since we hold an increment yet. But 5192 * this is the only safe way to do this since 5193 * otherwise if the socket closes at the same time 5194 * we are here we might collide in the cleanup. 5195 */ 5196 sctp_inpcb_free(inp, 5197 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5198 SCTP_CALLED_DIRECTLY_NOCMPSET); 5199 SCTP_INP_DECR_REF(inp); 5200 } else { 5201 /* The socket is still open. */ 5202 SCTP_INP_DECR_REF(inp); 5203 SCTP_INP_RUNLOCK(inp); 5204 } 5205 } 5206 /* destroyed the asoc */ 5207 #ifdef SCTP_LOG_CLOSING 5208 sctp_log_closing(inp, NULL, 11); 5209 #endif 5210 return (1); 5211 } 5212 5213 5214 5215 /* 5216 * determine if a destination is "reachable" based upon the addresses bound 5217 * to the current endpoint (e.g. only v4 or v6 currently bound) 5218 */ 5219 /* 5220 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5221 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5222 * types bound as its endpoint 5223 */ 5224 int 5225 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5226 { 5227 struct sctp_inpcb *inp; 5228 int answer; 5229 5230 /* 5231 * No locks here, the TCB, in all cases is already locked and an 5232 * assoc is up. There is either a INP lock by the caller applied (in 5233 * asconf case when deleting an address) or NOT in the HB case, 5234 * however if HB then the INP increment is up and the INP will not 5235 * be removed (on top of the fact that we have a TCB lock). So we 5236 * only want to read the sctp_flags, which is either bound-all or 5237 * not.. no protection needed since once an assoc is up you can't be 5238 * changing your binding. 5239 */ 5240 inp = stcb->sctp_ep; 5241 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5242 /* if bound all, destination is not restricted */ 5243 /* 5244 * RRS: Question during lock work: Is this correct? If you 5245 * are bound-all you still might need to obey the V4--V6 5246 * flags??? IMO this bound-all stuff needs to be removed! 5247 */ 5248 return (1); 5249 } 5250 /* NOTE: all "scope" checks are done when local addresses are added */ 5251 switch (destaddr->sa_family) { 5252 #ifdef INET6 5253 case AF_INET6: 5254 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5255 break; 5256 #endif 5257 #ifdef INET 5258 case AF_INET: 5259 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5260 break; 5261 #endif 5262 default: 5263 /* invalid family, so it's unreachable */ 5264 answer = 0; 5265 break; 5266 } 5267 return (answer); 5268 } 5269 5270 /* 5271 * update the inp_vflags on an endpoint 5272 */ 5273 static void 5274 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5275 { 5276 struct sctp_laddr *laddr; 5277 5278 /* first clear the flag */ 5279 inp->ip_inp.inp.inp_vflag = 0; 5280 /* set the flag based on addresses on the ep list */ 5281 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5282 if (laddr->ifa == NULL) { 5283 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5284 __func__); 5285 continue; 5286 } 5287 5288 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5289 continue; 5290 } 5291 switch (laddr->ifa->address.sa.sa_family) { 5292 #ifdef INET6 5293 case AF_INET6: 5294 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5295 break; 5296 #endif 5297 #ifdef INET 5298 case AF_INET: 5299 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5300 break; 5301 #endif 5302 default: 5303 break; 5304 } 5305 } 5306 } 5307 5308 /* 5309 * Add the address to the endpoint local address list There is nothing to be 5310 * done if we are bound to all addresses 5311 */ 5312 void 5313 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5314 { 5315 struct sctp_laddr *laddr; 5316 struct sctp_tcb *stcb; 5317 int fnd, error = 0; 5318 5319 fnd = 0; 5320 5321 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5322 /* You are already bound to all. You have it already */ 5323 return; 5324 } 5325 #ifdef INET6 5326 if (ifa->address.sa.sa_family == AF_INET6) { 5327 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5328 /* Can't bind a non-useable addr. */ 5329 return; 5330 } 5331 } 5332 #endif 5333 /* first, is it already present? */ 5334 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5335 if (laddr->ifa == ifa) { 5336 fnd = 1; 5337 break; 5338 } 5339 } 5340 5341 if (fnd == 0) { 5342 /* Not in the ep list */ 5343 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5344 if (error != 0) 5345 return; 5346 inp->laddr_count++; 5347 /* update inp_vflag flags */ 5348 switch (ifa->address.sa.sa_family) { 5349 #ifdef INET6 5350 case AF_INET6: 5351 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5352 break; 5353 #endif 5354 #ifdef INET 5355 case AF_INET: 5356 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5357 break; 5358 #endif 5359 default: 5360 break; 5361 } 5362 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5363 sctp_add_local_addr_restricted(stcb, ifa); 5364 } 5365 } 5366 return; 5367 } 5368 5369 5370 /* 5371 * select a new (hopefully reachable) destination net (should only be used 5372 * when we deleted an ep addr that is the only usable source address to reach 5373 * the destination net) 5374 */ 5375 static void 5376 sctp_select_primary_destination(struct sctp_tcb *stcb) 5377 { 5378 struct sctp_nets *net; 5379 5380 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5381 /* for now, we'll just pick the first reachable one we find */ 5382 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5383 continue; 5384 if (sctp_destination_is_reachable(stcb, 5385 (struct sockaddr *)&net->ro._l_addr)) { 5386 /* found a reachable destination */ 5387 stcb->asoc.primary_destination = net; 5388 } 5389 } 5390 /* I can't there from here! ...we're gonna die shortly... */ 5391 } 5392 5393 5394 /* 5395 * Delete the address from the endpoint local address list. There is nothing 5396 * to be done if we are bound to all addresses 5397 */ 5398 void 5399 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5400 { 5401 struct sctp_laddr *laddr; 5402 int fnd; 5403 5404 fnd = 0; 5405 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5406 /* You are already bound to all. You have it already */ 5407 return; 5408 } 5409 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5410 if (laddr->ifa == ifa) { 5411 fnd = 1; 5412 break; 5413 } 5414 } 5415 if (fnd && (inp->laddr_count < 2)) { 5416 /* can't delete unless there are at LEAST 2 addresses */ 5417 return; 5418 } 5419 if (fnd) { 5420 /* 5421 * clean up any use of this address go through our 5422 * associations and clear any last_used_address that match 5423 * this one for each assoc, see if a new primary_destination 5424 * is needed 5425 */ 5426 struct sctp_tcb *stcb; 5427 5428 /* clean up "next_addr_touse" */ 5429 if (inp->next_addr_touse == laddr) 5430 /* delete this address */ 5431 inp->next_addr_touse = NULL; 5432 5433 /* clean up "last_used_address" */ 5434 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5435 struct sctp_nets *net; 5436 5437 SCTP_TCB_LOCK(stcb); 5438 if (stcb->asoc.last_used_address == laddr) 5439 /* delete this address */ 5440 stcb->asoc.last_used_address = NULL; 5441 /* 5442 * Now spin through all the nets and purge any ref 5443 * to laddr 5444 */ 5445 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5446 if (net->ro._s_addr == laddr->ifa) { 5447 /* Yep, purge src address selected */ 5448 RO_NHFREE(&net->ro); 5449 sctp_free_ifa(net->ro._s_addr); 5450 net->ro._s_addr = NULL; 5451 net->src_addr_selected = 0; 5452 } 5453 } 5454 SCTP_TCB_UNLOCK(stcb); 5455 } /* for each tcb */ 5456 /* remove it from the ep list */ 5457 sctp_remove_laddr(laddr); 5458 inp->laddr_count--; 5459 /* update inp_vflag flags */ 5460 sctp_update_ep_vflag(inp); 5461 } 5462 return; 5463 } 5464 5465 /* 5466 * Add the address to the TCB local address restricted list. 5467 * This is a "pending" address list (eg. addresses waiting for an 5468 * ASCONF-ACK response) and cannot be used as a valid source address. 5469 */ 5470 void 5471 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5472 { 5473 struct sctp_laddr *laddr; 5474 struct sctpladdr *list; 5475 5476 /* 5477 * Assumes TCB is locked.. and possibly the INP. May need to 5478 * confirm/fix that if we need it and is not the case. 5479 */ 5480 list = &stcb->asoc.sctp_restricted_addrs; 5481 5482 #ifdef INET6 5483 if (ifa->address.sa.sa_family == AF_INET6) { 5484 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5485 /* Can't bind a non-existent addr. */ 5486 return; 5487 } 5488 } 5489 #endif 5490 /* does the address already exist? */ 5491 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5492 if (laddr->ifa == ifa) { 5493 return; 5494 } 5495 } 5496 5497 /* add to the list */ 5498 (void)sctp_insert_laddr(list, ifa, 0); 5499 return; 5500 } 5501 5502 /* 5503 * Remove a local address from the TCB local address restricted list 5504 */ 5505 void 5506 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5507 { 5508 struct sctp_inpcb *inp; 5509 struct sctp_laddr *laddr; 5510 5511 /* 5512 * This is called by asconf work. It is assumed that a) The TCB is 5513 * locked and b) The INP is locked. This is true in as much as I can 5514 * trace through the entry asconf code where I did these locks. 5515 * Again, the ASCONF code is a bit different in that it does lock 5516 * the INP during its work often times. This must be since we don't 5517 * want other proc's looking up things while what they are looking 5518 * up is changing :-D 5519 */ 5520 5521 inp = stcb->sctp_ep; 5522 /* if subset bound and don't allow ASCONF's, can't delete last */ 5523 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5524 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5525 if (stcb->sctp_ep->laddr_count < 2) { 5526 /* can't delete last address */ 5527 return; 5528 } 5529 } 5530 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5531 /* remove the address if it exists */ 5532 if (laddr->ifa == NULL) 5533 continue; 5534 if (laddr->ifa == ifa) { 5535 sctp_remove_laddr(laddr); 5536 return; 5537 } 5538 } 5539 5540 /* address not found! */ 5541 return; 5542 } 5543 5544 /* sysctl */ 5545 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5546 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5547 5548 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5549 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5550 int *sctp_cpuarry = NULL; 5551 5552 void 5553 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5554 { 5555 /* Queue a packet to a processor for the specified core */ 5556 struct sctp_mcore_queue *qent; 5557 struct sctp_mcore_ctrl *wkq; 5558 int need_wake = 0; 5559 5560 if (sctp_mcore_workers == NULL) { 5561 /* Something went way bad during setup */ 5562 sctp_input_with_port(m, off, 0); 5563 return; 5564 } 5565 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5566 (sizeof(struct sctp_mcore_queue)), 5567 SCTP_M_MCORE); 5568 if (qent == NULL) { 5569 /* This is trouble */ 5570 sctp_input_with_port(m, off, 0); 5571 return; 5572 } 5573 qent->vn = curvnet; 5574 qent->m = m; 5575 qent->off = off; 5576 qent->v6 = 0; 5577 wkq = &sctp_mcore_workers[cpu_to_use]; 5578 SCTP_MCORE_QLOCK(wkq); 5579 5580 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5581 if (wkq->running == 0) { 5582 need_wake = 1; 5583 } 5584 SCTP_MCORE_QUNLOCK(wkq); 5585 if (need_wake) { 5586 wakeup(&wkq->running); 5587 } 5588 } 5589 5590 static void 5591 sctp_mcore_thread(void *arg) 5592 { 5593 5594 struct sctp_mcore_ctrl *wkq; 5595 struct sctp_mcore_queue *qent; 5596 5597 wkq = (struct sctp_mcore_ctrl *)arg; 5598 struct mbuf *m; 5599 int off, v6; 5600 5601 /* Wait for first tickle */ 5602 SCTP_MCORE_LOCK(wkq); 5603 wkq->running = 0; 5604 msleep(&wkq->running, 5605 &wkq->core_mtx, 5606 0, "wait for pkt", 0); 5607 SCTP_MCORE_UNLOCK(wkq); 5608 5609 /* Bind to our cpu */ 5610 thread_lock(curthread); 5611 sched_bind(curthread, wkq->cpuid); 5612 thread_unlock(curthread); 5613 5614 /* Now lets start working */ 5615 SCTP_MCORE_LOCK(wkq); 5616 /* Now grab lock and go */ 5617 for (;;) { 5618 SCTP_MCORE_QLOCK(wkq); 5619 skip_sleep: 5620 wkq->running = 1; 5621 qent = TAILQ_FIRST(&wkq->que); 5622 if (qent) { 5623 TAILQ_REMOVE(&wkq->que, qent, next); 5624 SCTP_MCORE_QUNLOCK(wkq); 5625 CURVNET_SET(qent->vn); 5626 m = qent->m; 5627 off = qent->off; 5628 v6 = qent->v6; 5629 SCTP_FREE(qent, SCTP_M_MCORE); 5630 if (v6 == 0) { 5631 sctp_input_with_port(m, off, 0); 5632 } else { 5633 SCTP_PRINTF("V6 not yet supported\n"); 5634 sctp_m_freem(m); 5635 } 5636 CURVNET_RESTORE(); 5637 SCTP_MCORE_QLOCK(wkq); 5638 } 5639 wkq->running = 0; 5640 if (!TAILQ_EMPTY(&wkq->que)) { 5641 goto skip_sleep; 5642 } 5643 SCTP_MCORE_QUNLOCK(wkq); 5644 msleep(&wkq->running, 5645 &wkq->core_mtx, 5646 0, "wait for pkt", 0); 5647 } 5648 } 5649 5650 static void 5651 sctp_startup_mcore_threads(void) 5652 { 5653 int i, cpu; 5654 5655 if (mp_ncpus == 1) 5656 return; 5657 5658 if (sctp_mcore_workers != NULL) { 5659 /* 5660 * Already been here in some previous vnet? 5661 */ 5662 return; 5663 } 5664 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5665 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5666 SCTP_M_MCORE); 5667 if (sctp_mcore_workers == NULL) { 5668 /* TSNH I hope */ 5669 return; 5670 } 5671 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5672 sizeof(struct sctp_mcore_ctrl))); 5673 /* Init the structures */ 5674 for (i = 0; i <= mp_maxid; i++) { 5675 TAILQ_INIT(&sctp_mcore_workers[i].que); 5676 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5677 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5678 sctp_mcore_workers[i].cpuid = i; 5679 } 5680 if (sctp_cpuarry == NULL) { 5681 SCTP_MALLOC(sctp_cpuarry, int *, 5682 (mp_ncpus * sizeof(int)), 5683 SCTP_M_MCORE); 5684 i = 0; 5685 CPU_FOREACH(cpu) { 5686 sctp_cpuarry[i] = cpu; 5687 i++; 5688 } 5689 } 5690 /* Now start them all */ 5691 CPU_FOREACH(cpu) { 5692 (void)kproc_create(sctp_mcore_thread, 5693 (void *)&sctp_mcore_workers[cpu], 5694 &sctp_mcore_workers[cpu].thread_proc, 5695 RFPROC, 5696 SCTP_KTHREAD_PAGES, 5697 SCTP_MCORE_NAME); 5698 } 5699 } 5700 #endif 5701 5702 void 5703 sctp_pcb_init(void) 5704 { 5705 /* 5706 * SCTP initialization for the PCB structures should be called by 5707 * the sctp_init() function. 5708 */ 5709 int i; 5710 struct timeval tv; 5711 5712 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5713 /* error I was called twice */ 5714 return; 5715 } 5716 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5717 5718 #if defined(SCTP_LOCAL_TRACE_BUF) 5719 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5720 #endif 5721 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5722 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5723 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5724 SCTP_M_MCORE); 5725 #endif 5726 (void)SCTP_GETTIME_TIMEVAL(&tv); 5727 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5728 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5729 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5730 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5731 #else 5732 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5733 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5734 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5735 #endif 5736 /* init the empty list of (All) Endpoints */ 5737 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5738 5739 5740 /* init the hash table of endpoints */ 5741 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5742 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5743 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5744 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5745 &SCTP_BASE_INFO(hashasocmark)); 5746 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5747 &SCTP_BASE_INFO(hashmark)); 5748 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5749 &SCTP_BASE_INFO(hashtcpmark)); 5750 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5751 5752 5753 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5754 &SCTP_BASE_INFO(hashvrfmark)); 5755 5756 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5757 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5758 /* init the zones */ 5759 /* 5760 * FIX ME: Should check for NULL returns, but if it does fail we are 5761 * doomed to panic anyways... add later maybe. 5762 */ 5763 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5764 sizeof(struct sctp_inpcb), maxsockets); 5765 5766 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5767 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5768 5769 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5770 sizeof(struct sctp_laddr), 5771 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5772 5773 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5774 sizeof(struct sctp_nets), 5775 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5776 5777 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5778 sizeof(struct sctp_tmit_chunk), 5779 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5780 5781 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5782 sizeof(struct sctp_queued_to_read), 5783 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5784 5785 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5786 sizeof(struct sctp_stream_queue_pending), 5787 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5788 5789 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5790 sizeof(struct sctp_asconf), 5791 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5792 5793 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5794 sizeof(struct sctp_asconf_ack), 5795 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5796 5797 5798 /* Master Lock INIT for info structure */ 5799 SCTP_INP_INFO_LOCK_INIT(); 5800 SCTP_STATLOG_INIT_LOCK(); 5801 5802 SCTP_IPI_COUNT_INIT(); 5803 SCTP_IPI_ADDR_INIT(); 5804 #ifdef SCTP_PACKET_LOGGING 5805 SCTP_IP_PKTLOG_INIT(); 5806 #endif 5807 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5808 5809 SCTP_WQ_ADDR_INIT(); 5810 /* not sure if we need all the counts */ 5811 SCTP_BASE_INFO(ipi_count_ep) = 0; 5812 /* assoc/tcb zone info */ 5813 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5814 /* local addrlist zone info */ 5815 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5816 /* remote addrlist zone info */ 5817 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5818 /* chunk info */ 5819 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5820 5821 /* socket queue zone info */ 5822 SCTP_BASE_INFO(ipi_count_readq) = 0; 5823 5824 /* stream out queue cont */ 5825 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5826 5827 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5828 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5829 5830 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5831 5832 /* Init the TIMEWAIT list */ 5833 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5834 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5835 } 5836 sctp_startup_iterator(); 5837 5838 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5839 sctp_startup_mcore_threads(); 5840 #endif 5841 5842 /* 5843 * INIT the default VRF which for BSD is the only one, other O/S's 5844 * may have more. But initially they must start with one and then 5845 * add the VRF's as addresses are added. 5846 */ 5847 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5848 } 5849 5850 /* 5851 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5852 */ 5853 void 5854 sctp_pcb_finish(void) 5855 { 5856 struct sctp_vrflist *vrf_bucket; 5857 struct sctp_vrf *vrf, *nvrf; 5858 struct sctp_ifn *ifn, *nifn; 5859 struct sctp_ifa *ifa, *nifa; 5860 struct sctpvtaghead *chain; 5861 struct sctp_tagblock *twait_block, *prev_twait_block; 5862 struct sctp_laddr *wi, *nwi; 5863 int i; 5864 struct sctp_iterator *it, *nit; 5865 5866 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5867 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5868 return; 5869 } 5870 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5871 /* 5872 * In FreeBSD the iterator thread never exits but we do clean up. 5873 * The only way FreeBSD reaches here is if we have VRF's but we 5874 * still add the ifdef to make it compile on old versions. 5875 */ 5876 retry: 5877 SCTP_IPI_ITERATOR_WQ_LOCK(); 5878 /* 5879 * sctp_iterator_worker() might be working on an it entry without 5880 * holding the lock. We won't find it on the list either and 5881 * continue and free/destroy it. While holding the lock, spin, to 5882 * avoid the race condition as sctp_iterator_worker() will have to 5883 * wait to re-acquire the lock. 5884 */ 5885 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5886 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5887 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5888 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5889 DELAY(10); 5890 goto retry; 5891 } 5892 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5893 if (it->vn != curvnet) { 5894 continue; 5895 } 5896 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5897 if (it->function_atend != NULL) { 5898 (*it->function_atend) (it->pointer, it->val); 5899 } 5900 SCTP_FREE(it, SCTP_M_ITER); 5901 } 5902 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5903 SCTP_ITERATOR_LOCK(); 5904 if ((sctp_it_ctl.cur_it) && 5905 (sctp_it_ctl.cur_it->vn == curvnet)) { 5906 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5907 } 5908 SCTP_ITERATOR_UNLOCK(); 5909 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5910 SCTP_WQ_ADDR_LOCK(); 5911 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5912 LIST_REMOVE(wi, sctp_nxt_addr); 5913 SCTP_DECR_LADDR_COUNT(); 5914 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5915 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5916 } 5917 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5918 } 5919 SCTP_WQ_ADDR_UNLOCK(); 5920 5921 /* 5922 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5923 * destroyed first). 5924 */ 5925 SCTP_IPI_ADDR_WLOCK(); 5926 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5927 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5928 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5929 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5930 /* free the ifa */ 5931 LIST_REMOVE(ifa, next_bucket); 5932 LIST_REMOVE(ifa, next_ifa); 5933 SCTP_FREE(ifa, SCTP_M_IFA); 5934 } 5935 /* free the ifn */ 5936 LIST_REMOVE(ifn, next_bucket); 5937 LIST_REMOVE(ifn, next_ifn); 5938 SCTP_FREE(ifn, SCTP_M_IFN); 5939 } 5940 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5941 /* free the vrf */ 5942 LIST_REMOVE(vrf, next_vrf); 5943 SCTP_FREE(vrf, SCTP_M_VRF); 5944 } 5945 SCTP_IPI_ADDR_WUNLOCK(); 5946 /* free the vrf hashes */ 5947 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5948 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5949 5950 /* 5951 * free the TIMEWAIT list elements malloc'd in the function 5952 * sctp_add_vtag_to_timewait()... 5953 */ 5954 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5955 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5956 if (!LIST_EMPTY(chain)) { 5957 prev_twait_block = NULL; 5958 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5959 if (prev_twait_block) { 5960 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5961 } 5962 prev_twait_block = twait_block; 5963 } 5964 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5965 } 5966 } 5967 5968 /* free the locks and mutexes */ 5969 #ifdef SCTP_PACKET_LOGGING 5970 SCTP_IP_PKTLOG_DESTROY(); 5971 #endif 5972 SCTP_IPI_ADDR_DESTROY(); 5973 SCTP_STATLOG_DESTROY(); 5974 SCTP_INP_INFO_LOCK_DESTROY(); 5975 5976 SCTP_WQ_ADDR_DESTROY(); 5977 5978 /* Get rid of other stuff too. */ 5979 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5980 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5981 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5982 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5983 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5984 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5985 5986 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5987 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5988 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5989 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5990 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5991 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5992 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5993 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5994 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5995 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5996 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5997 #endif 5998 } 5999 6000 6001 int 6002 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6003 int offset, int limit, 6004 struct sockaddr *src, struct sockaddr *dst, 6005 struct sockaddr *altsa, uint16_t port) 6006 { 6007 /* 6008 * grub through the INIT pulling addresses and loading them to the 6009 * nets structure in the asoc. The from address in the mbuf should 6010 * also be loaded (if it is not already). This routine can be called 6011 * with either INIT or INIT-ACK's as long as the m points to the IP 6012 * packet and the offset points to the beginning of the parameters. 6013 */ 6014 struct sctp_inpcb *inp; 6015 struct sctp_nets *net, *nnet, *net_tmp; 6016 struct sctp_paramhdr *phdr, param_buf; 6017 struct sctp_tcb *stcb_tmp; 6018 uint16_t ptype, plen; 6019 struct sockaddr *sa; 6020 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6021 struct sctp_auth_random *p_random = NULL; 6022 uint16_t random_len = 0; 6023 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6024 struct sctp_auth_hmac_algo *hmacs = NULL; 6025 uint16_t hmacs_len = 0; 6026 uint8_t saw_asconf = 0; 6027 uint8_t saw_asconf_ack = 0; 6028 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6029 struct sctp_auth_chunk_list *chunks = NULL; 6030 uint16_t num_chunks = 0; 6031 sctp_key_t *new_key; 6032 uint32_t keylen; 6033 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6034 uint8_t peer_supports_ecn; 6035 uint8_t peer_supports_prsctp; 6036 uint8_t peer_supports_auth; 6037 uint8_t peer_supports_asconf; 6038 uint8_t peer_supports_asconf_ack; 6039 uint8_t peer_supports_reconfig; 6040 uint8_t peer_supports_nrsack; 6041 uint8_t peer_supports_pktdrop; 6042 uint8_t peer_supports_idata; 6043 #ifdef INET 6044 struct sockaddr_in sin; 6045 #endif 6046 #ifdef INET6 6047 struct sockaddr_in6 sin6; 6048 #endif 6049 6050 /* First get the destination address setup too. */ 6051 #ifdef INET 6052 memset(&sin, 0, sizeof(sin)); 6053 sin.sin_family = AF_INET; 6054 sin.sin_len = sizeof(sin); 6055 sin.sin_port = stcb->rport; 6056 #endif 6057 #ifdef INET6 6058 memset(&sin6, 0, sizeof(sin6)); 6059 sin6.sin6_family = AF_INET6; 6060 sin6.sin6_len = sizeof(struct sockaddr_in6); 6061 sin6.sin6_port = stcb->rport; 6062 #endif 6063 if (altsa) { 6064 sa = altsa; 6065 } else { 6066 sa = src; 6067 } 6068 peer_supports_idata = 0; 6069 peer_supports_ecn = 0; 6070 peer_supports_prsctp = 0; 6071 peer_supports_auth = 0; 6072 peer_supports_asconf = 0; 6073 peer_supports_reconfig = 0; 6074 peer_supports_nrsack = 0; 6075 peer_supports_pktdrop = 0; 6076 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6077 /* mark all addresses that we have currently on the list */ 6078 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6079 } 6080 /* does the source address already exist? if so skip it */ 6081 inp = stcb->sctp_ep; 6082 atomic_add_int(&stcb->asoc.refcnt, 1); 6083 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6084 atomic_add_int(&stcb->asoc.refcnt, -1); 6085 6086 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6087 /* we must add the source address */ 6088 /* no scope set here since we have a tcb already. */ 6089 switch (sa->sa_family) { 6090 #ifdef INET 6091 case AF_INET: 6092 if (stcb->asoc.scope.ipv4_addr_legal) { 6093 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6094 return (-1); 6095 } 6096 } 6097 break; 6098 #endif 6099 #ifdef INET6 6100 case AF_INET6: 6101 if (stcb->asoc.scope.ipv6_addr_legal) { 6102 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6103 return (-2); 6104 } 6105 } 6106 break; 6107 #endif 6108 default: 6109 break; 6110 } 6111 } else { 6112 if (net_tmp != NULL && stcb_tmp == stcb) { 6113 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6114 } else if (stcb_tmp != stcb) { 6115 /* It belongs to another association? */ 6116 if (stcb_tmp) 6117 SCTP_TCB_UNLOCK(stcb_tmp); 6118 return (-3); 6119 } 6120 } 6121 if (stcb->asoc.state == 0) { 6122 /* the assoc was freed? */ 6123 return (-4); 6124 } 6125 /* now we must go through each of the params. */ 6126 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6127 while (phdr) { 6128 ptype = ntohs(phdr->param_type); 6129 plen = ntohs(phdr->param_length); 6130 /* 6131 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6132 * (uint32_t)ptype, (int)plen); 6133 */ 6134 if (offset + plen > limit) { 6135 break; 6136 } 6137 if (plen < sizeof(struct sctp_paramhdr)) { 6138 break; 6139 } 6140 #ifdef INET 6141 if (ptype == SCTP_IPV4_ADDRESS) { 6142 if (stcb->asoc.scope.ipv4_addr_legal) { 6143 struct sctp_ipv4addr_param *p4, p4_buf; 6144 6145 /* ok get the v4 address and check/add */ 6146 phdr = sctp_get_next_param(m, offset, 6147 (struct sctp_paramhdr *)&p4_buf, 6148 sizeof(p4_buf)); 6149 if (plen != sizeof(struct sctp_ipv4addr_param) || 6150 phdr == NULL) { 6151 return (-5); 6152 } 6153 p4 = (struct sctp_ipv4addr_param *)phdr; 6154 sin.sin_addr.s_addr = p4->addr; 6155 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6156 /* Skip multi-cast addresses */ 6157 goto next_param; 6158 } 6159 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6160 (sin.sin_addr.s_addr == INADDR_ANY)) { 6161 goto next_param; 6162 } 6163 sa = (struct sockaddr *)&sin; 6164 inp = stcb->sctp_ep; 6165 atomic_add_int(&stcb->asoc.refcnt, 1); 6166 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6167 dst, stcb); 6168 atomic_add_int(&stcb->asoc.refcnt, -1); 6169 6170 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6171 inp == NULL) { 6172 /* we must add the source address */ 6173 /* 6174 * no scope set since we have a tcb 6175 * already 6176 */ 6177 6178 /* 6179 * we must validate the state again 6180 * here 6181 */ 6182 add_it_now: 6183 if (stcb->asoc.state == 0) { 6184 /* the assoc was freed? */ 6185 return (-7); 6186 } 6187 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6188 return (-8); 6189 } 6190 } else if (stcb_tmp == stcb) { 6191 if (stcb->asoc.state == 0) { 6192 /* the assoc was freed? */ 6193 return (-10); 6194 } 6195 if (net != NULL) { 6196 /* clear flag */ 6197 net->dest_state &= 6198 ~SCTP_ADDR_NOT_IN_ASSOC; 6199 } 6200 } else { 6201 /* 6202 * strange, address is in another 6203 * assoc? straighten out locks. 6204 */ 6205 if (stcb_tmp) { 6206 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6207 struct mbuf *op_err; 6208 char msg[SCTP_DIAG_INFO_LEN]; 6209 6210 /* 6211 * in setup state we 6212 * abort this guy 6213 */ 6214 SCTP_SNPRINTF(msg, sizeof(msg), 6215 "%s:%d at %s", __FILE__, __LINE__, __func__); 6216 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6217 msg); 6218 sctp_abort_an_association(stcb_tmp->sctp_ep, 6219 stcb_tmp, op_err, 6220 SCTP_SO_NOT_LOCKED); 6221 goto add_it_now; 6222 } 6223 SCTP_TCB_UNLOCK(stcb_tmp); 6224 } 6225 6226 if (stcb->asoc.state == 0) { 6227 /* the assoc was freed? */ 6228 return (-12); 6229 } 6230 return (-13); 6231 } 6232 } 6233 } else 6234 #endif 6235 #ifdef INET6 6236 if (ptype == SCTP_IPV6_ADDRESS) { 6237 if (stcb->asoc.scope.ipv6_addr_legal) { 6238 /* ok get the v6 address and check/add */ 6239 struct sctp_ipv6addr_param *p6, p6_buf; 6240 6241 phdr = sctp_get_next_param(m, offset, 6242 (struct sctp_paramhdr *)&p6_buf, 6243 sizeof(p6_buf)); 6244 if (plen != sizeof(struct sctp_ipv6addr_param) || 6245 phdr == NULL) { 6246 return (-14); 6247 } 6248 p6 = (struct sctp_ipv6addr_param *)phdr; 6249 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6250 sizeof(p6->addr)); 6251 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6252 /* Skip multi-cast addresses */ 6253 goto next_param; 6254 } 6255 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6256 /* 6257 * Link local make no sense without 6258 * scope 6259 */ 6260 goto next_param; 6261 } 6262 sa = (struct sockaddr *)&sin6; 6263 inp = stcb->sctp_ep; 6264 atomic_add_int(&stcb->asoc.refcnt, 1); 6265 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6266 dst, stcb); 6267 atomic_add_int(&stcb->asoc.refcnt, -1); 6268 if (stcb_tmp == NULL && 6269 (inp == stcb->sctp_ep || inp == NULL)) { 6270 /* 6271 * we must validate the state again 6272 * here 6273 */ 6274 add_it_now6: 6275 if (stcb->asoc.state == 0) { 6276 /* the assoc was freed? */ 6277 return (-16); 6278 } 6279 /* 6280 * we must add the address, no scope 6281 * set 6282 */ 6283 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6284 return (-17); 6285 } 6286 } else if (stcb_tmp == stcb) { 6287 /* 6288 * we must validate the state again 6289 * here 6290 */ 6291 if (stcb->asoc.state == 0) { 6292 /* the assoc was freed? */ 6293 return (-19); 6294 } 6295 if (net != NULL) { 6296 /* clear flag */ 6297 net->dest_state &= 6298 ~SCTP_ADDR_NOT_IN_ASSOC; 6299 } 6300 } else { 6301 /* 6302 * strange, address is in another 6303 * assoc? straighten out locks. 6304 */ 6305 if (stcb_tmp) { 6306 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6307 struct mbuf *op_err; 6308 char msg[SCTP_DIAG_INFO_LEN]; 6309 6310 /* 6311 * in setup state we 6312 * abort this guy 6313 */ 6314 SCTP_SNPRINTF(msg, sizeof(msg), 6315 "%s:%d at %s", __FILE__, __LINE__, __func__); 6316 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6317 msg); 6318 sctp_abort_an_association(stcb_tmp->sctp_ep, 6319 stcb_tmp, op_err, 6320 SCTP_SO_NOT_LOCKED); 6321 goto add_it_now6; 6322 } 6323 SCTP_TCB_UNLOCK(stcb_tmp); 6324 } 6325 if (stcb->asoc.state == 0) { 6326 /* the assoc was freed? */ 6327 return (-21); 6328 } 6329 return (-22); 6330 } 6331 } 6332 } else 6333 #endif 6334 if (ptype == SCTP_ECN_CAPABLE) { 6335 peer_supports_ecn = 1; 6336 } else if (ptype == SCTP_ULP_ADAPTATION) { 6337 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6338 struct sctp_adaptation_layer_indication ai, 6339 *aip; 6340 6341 phdr = sctp_get_next_param(m, offset, 6342 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6343 aip = (struct sctp_adaptation_layer_indication *)phdr; 6344 if (aip) { 6345 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6346 stcb->asoc.adaptation_needed = 1; 6347 } 6348 } 6349 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6350 struct sctp_asconf_addr_param lstore, *fee; 6351 int lptype; 6352 struct sockaddr *lsa = NULL; 6353 #ifdef INET 6354 struct sctp_asconf_addrv4_param *fii; 6355 #endif 6356 6357 if (stcb->asoc.asconf_supported == 0) { 6358 return (-100); 6359 } 6360 if (plen > sizeof(lstore)) { 6361 return (-23); 6362 } 6363 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6364 return (-101); 6365 } 6366 phdr = sctp_get_next_param(m, offset, 6367 (struct sctp_paramhdr *)&lstore, 6368 plen); 6369 if (phdr == NULL) { 6370 return (-24); 6371 } 6372 fee = (struct sctp_asconf_addr_param *)phdr; 6373 lptype = ntohs(fee->addrp.ph.param_type); 6374 switch (lptype) { 6375 #ifdef INET 6376 case SCTP_IPV4_ADDRESS: 6377 if (plen != 6378 sizeof(struct sctp_asconf_addrv4_param)) { 6379 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6380 (int)sizeof(struct sctp_asconf_addrv4_param), 6381 plen); 6382 } else { 6383 fii = (struct sctp_asconf_addrv4_param *)fee; 6384 sin.sin_addr.s_addr = fii->addrp.addr; 6385 lsa = (struct sockaddr *)&sin; 6386 } 6387 break; 6388 #endif 6389 #ifdef INET6 6390 case SCTP_IPV6_ADDRESS: 6391 if (plen != 6392 sizeof(struct sctp_asconf_addr_param)) { 6393 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6394 (int)sizeof(struct sctp_asconf_addr_param), 6395 plen); 6396 } else { 6397 memcpy(sin6.sin6_addr.s6_addr, 6398 fee->addrp.addr, 6399 sizeof(fee->addrp.addr)); 6400 lsa = (struct sockaddr *)&sin6; 6401 } 6402 break; 6403 #endif 6404 default: 6405 break; 6406 } 6407 if (lsa) { 6408 (void)sctp_set_primary_addr(stcb, sa, NULL); 6409 } 6410 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6411 stcb->asoc.peer_supports_nat = 1; 6412 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6413 /* Peer supports pr-sctp */ 6414 peer_supports_prsctp = 1; 6415 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6416 /* A supported extension chunk */ 6417 struct sctp_supported_chunk_types_param *pr_supported; 6418 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6419 int num_ent, i; 6420 6421 if (plen > sizeof(local_store)) { 6422 return (-35); 6423 } 6424 phdr = sctp_get_next_param(m, offset, 6425 (struct sctp_paramhdr *)&local_store, plen); 6426 if (phdr == NULL) { 6427 return (-25); 6428 } 6429 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6430 num_ent = plen - sizeof(struct sctp_paramhdr); 6431 for (i = 0; i < num_ent; i++) { 6432 switch (pr_supported->chunk_types[i]) { 6433 case SCTP_ASCONF: 6434 peer_supports_asconf = 1; 6435 break; 6436 case SCTP_ASCONF_ACK: 6437 peer_supports_asconf_ack = 1; 6438 break; 6439 case SCTP_FORWARD_CUM_TSN: 6440 peer_supports_prsctp = 1; 6441 break; 6442 case SCTP_PACKET_DROPPED: 6443 peer_supports_pktdrop = 1; 6444 break; 6445 case SCTP_NR_SELECTIVE_ACK: 6446 peer_supports_nrsack = 1; 6447 break; 6448 case SCTP_STREAM_RESET: 6449 peer_supports_reconfig = 1; 6450 break; 6451 case SCTP_AUTHENTICATION: 6452 peer_supports_auth = 1; 6453 break; 6454 case SCTP_IDATA: 6455 peer_supports_idata = 1; 6456 break; 6457 default: 6458 /* one I have not learned yet */ 6459 break; 6460 6461 } 6462 } 6463 } else if (ptype == SCTP_RANDOM) { 6464 if (plen > sizeof(random_store)) 6465 break; 6466 if (got_random) { 6467 /* already processed a RANDOM */ 6468 goto next_param; 6469 } 6470 phdr = sctp_get_next_param(m, offset, 6471 (struct sctp_paramhdr *)random_store, 6472 plen); 6473 if (phdr == NULL) 6474 return (-26); 6475 p_random = (struct sctp_auth_random *)phdr; 6476 random_len = plen - sizeof(*p_random); 6477 /* enforce the random length */ 6478 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6479 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6480 return (-27); 6481 } 6482 got_random = 1; 6483 } else if (ptype == SCTP_HMAC_LIST) { 6484 uint16_t num_hmacs; 6485 uint16_t i; 6486 6487 if (plen > sizeof(hmacs_store)) 6488 break; 6489 if (got_hmacs) { 6490 /* already processed a HMAC list */ 6491 goto next_param; 6492 } 6493 phdr = sctp_get_next_param(m, offset, 6494 (struct sctp_paramhdr *)hmacs_store, 6495 plen); 6496 if (phdr == NULL) 6497 return (-28); 6498 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6499 hmacs_len = plen - sizeof(*hmacs); 6500 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6501 /* validate the hmac list */ 6502 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6503 return (-29); 6504 } 6505 if (stcb->asoc.peer_hmacs != NULL) 6506 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6507 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6508 if (stcb->asoc.peer_hmacs != NULL) { 6509 for (i = 0; i < num_hmacs; i++) { 6510 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6511 ntohs(hmacs->hmac_ids[i])); 6512 } 6513 } 6514 got_hmacs = 1; 6515 } else if (ptype == SCTP_CHUNK_LIST) { 6516 int i; 6517 6518 if (plen > sizeof(chunks_store)) 6519 break; 6520 if (got_chklist) { 6521 /* already processed a Chunks list */ 6522 goto next_param; 6523 } 6524 phdr = sctp_get_next_param(m, offset, 6525 (struct sctp_paramhdr *)chunks_store, 6526 plen); 6527 if (phdr == NULL) 6528 return (-30); 6529 chunks = (struct sctp_auth_chunk_list *)phdr; 6530 num_chunks = plen - sizeof(*chunks); 6531 if (stcb->asoc.peer_auth_chunks != NULL) 6532 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6533 else 6534 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6535 for (i = 0; i < num_chunks; i++) { 6536 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6537 stcb->asoc.peer_auth_chunks); 6538 /* record asconf/asconf-ack if listed */ 6539 if (chunks->chunk_types[i] == SCTP_ASCONF) 6540 saw_asconf = 1; 6541 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6542 saw_asconf_ack = 1; 6543 6544 } 6545 got_chklist = 1; 6546 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6547 (ptype == SCTP_STATE_COOKIE) || 6548 (ptype == SCTP_UNRECOG_PARAM) || 6549 (ptype == SCTP_COOKIE_PRESERVE) || 6550 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6551 (ptype == SCTP_ADD_IP_ADDRESS) || 6552 (ptype == SCTP_DEL_IP_ADDRESS) || 6553 (ptype == SCTP_ERROR_CAUSE_IND) || 6554 (ptype == SCTP_SUCCESS_REPORT)) { 6555 /* don't care */ ; 6556 } else { 6557 if ((ptype & 0x8000) == 0x0000) { 6558 /* 6559 * must stop processing the rest of the 6560 * param's. Any report bits were handled 6561 * with the call to 6562 * sctp_arethere_unrecognized_parameters() 6563 * when the INIT or INIT-ACK was first seen. 6564 */ 6565 break; 6566 } 6567 } 6568 6569 next_param: 6570 offset += SCTP_SIZE32(plen); 6571 if (offset >= limit) { 6572 break; 6573 } 6574 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6575 sizeof(param_buf)); 6576 } 6577 /* Now check to see if we need to purge any addresses */ 6578 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6579 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6580 SCTP_ADDR_NOT_IN_ASSOC) { 6581 /* This address has been removed from the asoc */ 6582 /* remove and free it */ 6583 stcb->asoc.numnets--; 6584 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6585 sctp_free_remote_addr(net); 6586 if (net == stcb->asoc.primary_destination) { 6587 stcb->asoc.primary_destination = NULL; 6588 sctp_select_primary_destination(stcb); 6589 } 6590 } 6591 } 6592 if ((stcb->asoc.ecn_supported == 1) && 6593 (peer_supports_ecn == 0)) { 6594 stcb->asoc.ecn_supported = 0; 6595 } 6596 if ((stcb->asoc.prsctp_supported == 1) && 6597 (peer_supports_prsctp == 0)) { 6598 stcb->asoc.prsctp_supported = 0; 6599 } 6600 if ((stcb->asoc.auth_supported == 1) && 6601 ((peer_supports_auth == 0) || 6602 (got_random == 0) || (got_hmacs == 0))) { 6603 stcb->asoc.auth_supported = 0; 6604 } 6605 if ((stcb->asoc.asconf_supported == 1) && 6606 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6607 (stcb->asoc.auth_supported == 0) || 6608 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6609 stcb->asoc.asconf_supported = 0; 6610 } 6611 if ((stcb->asoc.reconfig_supported == 1) && 6612 (peer_supports_reconfig == 0)) { 6613 stcb->asoc.reconfig_supported = 0; 6614 } 6615 if ((stcb->asoc.idata_supported == 1) && 6616 (peer_supports_idata == 0)) { 6617 stcb->asoc.idata_supported = 0; 6618 } 6619 if ((stcb->asoc.nrsack_supported == 1) && 6620 (peer_supports_nrsack == 0)) { 6621 stcb->asoc.nrsack_supported = 0; 6622 } 6623 if ((stcb->asoc.pktdrop_supported == 1) && 6624 (peer_supports_pktdrop == 0)) { 6625 stcb->asoc.pktdrop_supported = 0; 6626 } 6627 /* validate authentication required parameters */ 6628 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6629 /* peer does not support auth but sent a chunks list? */ 6630 return (-31); 6631 } 6632 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6633 /* peer supports asconf but not auth? */ 6634 return (-32); 6635 } else if ((peer_supports_asconf == 1) && 6636 (peer_supports_auth == 1) && 6637 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6638 return (-33); 6639 } 6640 /* concatenate the full random key */ 6641 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6642 if (chunks != NULL) { 6643 keylen += sizeof(*chunks) + num_chunks; 6644 } 6645 new_key = sctp_alloc_key(keylen); 6646 if (new_key != NULL) { 6647 /* copy in the RANDOM */ 6648 if (p_random != NULL) { 6649 keylen = sizeof(*p_random) + random_len; 6650 memcpy(new_key->key, p_random, keylen); 6651 } else { 6652 keylen = 0; 6653 } 6654 /* append in the AUTH chunks */ 6655 if (chunks != NULL) { 6656 memcpy(new_key->key + keylen, chunks, 6657 sizeof(*chunks) + num_chunks); 6658 keylen += sizeof(*chunks) + num_chunks; 6659 } 6660 /* append in the HMACs */ 6661 if (hmacs != NULL) { 6662 memcpy(new_key->key + keylen, hmacs, 6663 sizeof(*hmacs) + hmacs_len); 6664 } 6665 } else { 6666 /* failed to get memory for the key */ 6667 return (-34); 6668 } 6669 if (stcb->asoc.authinfo.peer_random != NULL) 6670 sctp_free_key(stcb->asoc.authinfo.peer_random); 6671 stcb->asoc.authinfo.peer_random = new_key; 6672 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6673 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6674 6675 return (0); 6676 } 6677 6678 int 6679 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6680 struct sctp_nets *net) 6681 { 6682 /* make sure the requested primary address exists in the assoc */ 6683 if (net == NULL && sa) 6684 net = sctp_findnet(stcb, sa); 6685 6686 if (net == NULL) { 6687 /* didn't find the requested primary address! */ 6688 return (-1); 6689 } else { 6690 /* set the primary address */ 6691 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6692 /* Must be confirmed, so queue to set */ 6693 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6694 return (0); 6695 } 6696 stcb->asoc.primary_destination = net; 6697 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6698 sctp_free_remote_addr(stcb->asoc.alternate); 6699 stcb->asoc.alternate = NULL; 6700 } 6701 net = TAILQ_FIRST(&stcb->asoc.nets); 6702 if (net != stcb->asoc.primary_destination) { 6703 /* 6704 * first one on the list is NOT the primary 6705 * sctp_cmpaddr() is much more efficient if the 6706 * primary is the first on the list, make it so. 6707 */ 6708 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6709 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6710 } 6711 return (0); 6712 } 6713 } 6714 6715 int 6716 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6717 { 6718 /* 6719 * This function serves two purposes. It will see if a TAG can be 6720 * re-used and return 1 for yes it is ok and 0 for don't use that 6721 * tag. A secondary function it will do is purge out old tags that 6722 * can be removed. 6723 */ 6724 struct sctpvtaghead *chain; 6725 struct sctp_tagblock *twait_block; 6726 struct sctpasochead *head; 6727 struct sctp_tcb *stcb; 6728 int i; 6729 6730 SCTP_INP_INFO_RLOCK(); 6731 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6732 SCTP_BASE_INFO(hashasocmark))]; 6733 LIST_FOREACH(stcb, head, sctp_asocs) { 6734 /* 6735 * We choose not to lock anything here. TCB's can't be 6736 * removed since we have the read lock, so they can't be 6737 * freed on us, same thing for the INP. I may be wrong with 6738 * this assumption, but we will go with it for now :-) 6739 */ 6740 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6741 continue; 6742 } 6743 if (stcb->asoc.my_vtag == tag) { 6744 /* candidate */ 6745 if (stcb->rport != rport) { 6746 continue; 6747 } 6748 if (stcb->sctp_ep->sctp_lport != lport) { 6749 continue; 6750 } 6751 /* Its a used tag set */ 6752 SCTP_INP_INFO_RUNLOCK(); 6753 return (0); 6754 } 6755 } 6756 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6757 /* Now what about timed wait ? */ 6758 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6759 /* 6760 * Block(s) are present, lets see if we have this tag in the 6761 * list 6762 */ 6763 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6764 if (twait_block->vtag_block[i].v_tag == 0) { 6765 /* not used */ 6766 continue; 6767 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6768 now->tv_sec) { 6769 /* Audit expires this guy */ 6770 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6771 twait_block->vtag_block[i].v_tag = 0; 6772 twait_block->vtag_block[i].lport = 0; 6773 twait_block->vtag_block[i].rport = 0; 6774 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6775 (twait_block->vtag_block[i].lport == lport) && 6776 (twait_block->vtag_block[i].rport == rport)) { 6777 /* Bad tag, sorry :< */ 6778 SCTP_INP_INFO_RUNLOCK(); 6779 return (0); 6780 } 6781 } 6782 } 6783 SCTP_INP_INFO_RUNLOCK(); 6784 return (1); 6785 } 6786 6787 static void 6788 sctp_drain_mbufs(struct sctp_tcb *stcb) 6789 { 6790 /* 6791 * We must hunt this association for MBUF's past the cumack (i.e. 6792 * out of order data that we can renege on). 6793 */ 6794 struct sctp_association *asoc; 6795 struct sctp_tmit_chunk *chk, *nchk; 6796 uint32_t cumulative_tsn_p1; 6797 struct sctp_queued_to_read *control, *ncontrol; 6798 int cnt, strmat; 6799 uint32_t gap, i; 6800 int fnd = 0; 6801 6802 /* We look for anything larger than the cum-ack + 1 */ 6803 6804 asoc = &stcb->asoc; 6805 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6806 /* none we can reneg on. */ 6807 return; 6808 } 6809 SCTP_STAT_INCR(sctps_protocol_drains_done); 6810 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6811 cnt = 0; 6812 /* Ok that was fun, now we will drain all the inbound streams? */ 6813 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6814 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6815 #ifdef INVARIANTS 6816 if (control->on_strm_q != SCTP_ON_ORDERED) { 6817 panic("Huh control: %p on_q: %d -- not ordered?", 6818 control, control->on_strm_q); 6819 } 6820 #endif 6821 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6822 /* Yep it is above cum-ack */ 6823 cnt++; 6824 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6825 KASSERT(control->length > 0, ("control has zero length")); 6826 if (asoc->size_on_all_streams >= control->length) { 6827 asoc->size_on_all_streams -= control->length; 6828 } else { 6829 #ifdef INVARIANTS 6830 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6831 #else 6832 asoc->size_on_all_streams = 0; 6833 #endif 6834 } 6835 sctp_ucount_decr(asoc->cnt_on_all_streams); 6836 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6837 if (control->on_read_q) { 6838 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6839 control->on_read_q = 0; 6840 } 6841 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6842 control->on_strm_q = 0; 6843 if (control->data) { 6844 sctp_m_freem(control->data); 6845 control->data = NULL; 6846 } 6847 sctp_free_remote_addr(control->whoFrom); 6848 /* Now its reasm? */ 6849 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6850 cnt++; 6851 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6852 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6853 if (asoc->size_on_reasm_queue >= chk->send_size) { 6854 asoc->size_on_reasm_queue -= chk->send_size; 6855 } else { 6856 #ifdef INVARIANTS 6857 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6858 #else 6859 asoc->size_on_reasm_queue = 0; 6860 #endif 6861 } 6862 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6863 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6864 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6865 if (chk->data) { 6866 sctp_m_freem(chk->data); 6867 chk->data = NULL; 6868 } 6869 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6870 } 6871 sctp_free_a_readq(stcb, control); 6872 } 6873 } 6874 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6875 #ifdef INVARIANTS 6876 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6877 panic("Huh control: %p on_q: %d -- not unordered?", 6878 control, control->on_strm_q); 6879 } 6880 #endif 6881 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6882 /* Yep it is above cum-ack */ 6883 cnt++; 6884 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6885 KASSERT(control->length > 0, ("control has zero length")); 6886 if (asoc->size_on_all_streams >= control->length) { 6887 asoc->size_on_all_streams -= control->length; 6888 } else { 6889 #ifdef INVARIANTS 6890 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6891 #else 6892 asoc->size_on_all_streams = 0; 6893 #endif 6894 } 6895 sctp_ucount_decr(asoc->cnt_on_all_streams); 6896 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6897 if (control->on_read_q) { 6898 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6899 control->on_read_q = 0; 6900 } 6901 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6902 control->on_strm_q = 0; 6903 if (control->data) { 6904 sctp_m_freem(control->data); 6905 control->data = NULL; 6906 } 6907 sctp_free_remote_addr(control->whoFrom); 6908 /* Now its reasm? */ 6909 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6910 cnt++; 6911 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6912 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6913 if (asoc->size_on_reasm_queue >= chk->send_size) { 6914 asoc->size_on_reasm_queue -= chk->send_size; 6915 } else { 6916 #ifdef INVARIANTS 6917 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6918 #else 6919 asoc->size_on_reasm_queue = 0; 6920 #endif 6921 } 6922 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6923 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6924 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6925 if (chk->data) { 6926 sctp_m_freem(chk->data); 6927 chk->data = NULL; 6928 } 6929 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6930 } 6931 sctp_free_a_readq(stcb, control); 6932 } 6933 } 6934 } 6935 if (cnt) { 6936 /* We must back down to see what the new highest is */ 6937 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6938 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6939 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6940 asoc->highest_tsn_inside_map = i; 6941 fnd = 1; 6942 break; 6943 } 6944 } 6945 if (!fnd) { 6946 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6947 } 6948 6949 /* 6950 * Question, should we go through the delivery queue? The 6951 * only reason things are on here is the app not reading OR 6952 * a p-d-api up. An attacker COULD send enough in to 6953 * initiate the PD-API and then send a bunch of stuff to 6954 * other streams... these would wind up on the delivery 6955 * queue.. and then we would not get to them. But in order 6956 * to do this I then have to back-track and un-deliver 6957 * sequence numbers in streams.. el-yucko. I think for now 6958 * we will NOT look at the delivery queue and leave it to be 6959 * something to consider later. An alternative would be to 6960 * abort the P-D-API with a notification and then deliver 6961 * the data.... Or another method might be to keep track of 6962 * how many times the situation occurs and if we see a 6963 * possible attack underway just abort the association. 6964 */ 6965 #ifdef SCTP_DEBUG 6966 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6967 #endif 6968 /* 6969 * Now do we need to find a new 6970 * asoc->highest_tsn_inside_map? 6971 */ 6972 asoc->last_revoke_count = cnt; 6973 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6974 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6975 /* sa_ignore NO_NULL_CHK */ 6976 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6977 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6978 } 6979 /* 6980 * Another issue, in un-setting the TSN's in the mapping array we 6981 * DID NOT adjust the highest_tsn marker. This will cause one of 6982 * two things to occur. It may cause us to do extra work in checking 6983 * for our mapping array movement. More importantly it may cause us 6984 * to SACK every datagram. This may not be a bad thing though since 6985 * we will recover once we get our cum-ack above and all this stuff 6986 * we dumped recovered. 6987 */ 6988 } 6989 6990 void 6991 sctp_drain() 6992 { 6993 /* 6994 * We must walk the PCB lists for ALL associations here. The system 6995 * is LOW on MBUF's and needs help. This is where reneging will 6996 * occur. We really hope this does NOT happen! 6997 */ 6998 VNET_ITERATOR_DECL(vnet_iter); 6999 VNET_LIST_RLOCK_NOSLEEP(); 7000 VNET_FOREACH(vnet_iter) { 7001 CURVNET_SET(vnet_iter); 7002 struct sctp_inpcb *inp; 7003 struct sctp_tcb *stcb; 7004 7005 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7006 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7007 #ifdef VIMAGE 7008 continue; 7009 #else 7010 return; 7011 #endif 7012 } 7013 SCTP_INP_INFO_RLOCK(); 7014 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7015 /* For each endpoint */ 7016 SCTP_INP_RLOCK(inp); 7017 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7018 /* For each association */ 7019 SCTP_TCB_LOCK(stcb); 7020 sctp_drain_mbufs(stcb); 7021 SCTP_TCB_UNLOCK(stcb); 7022 } 7023 SCTP_INP_RUNLOCK(inp); 7024 } 7025 SCTP_INP_INFO_RUNLOCK(); 7026 CURVNET_RESTORE(); 7027 } 7028 VNET_LIST_RUNLOCK_NOSLEEP(); 7029 } 7030 7031 /* 7032 * start a new iterator 7033 * iterates through all endpoints and associations based on the pcb_state 7034 * flags and asoc_state. "af" (mandatory) is executed for all matching 7035 * assocs and "ef" (optional) is executed when the iterator completes. 7036 * "inpf" (optional) is executed for each new endpoint as it is being 7037 * iterated through. inpe (optional) is called when the inp completes 7038 * its way through all the stcbs. 7039 */ 7040 int 7041 sctp_initiate_iterator(inp_func inpf, 7042 asoc_func af, 7043 inp_func inpe, 7044 uint32_t pcb_state, 7045 uint32_t pcb_features, 7046 uint32_t asoc_state, 7047 void *argp, 7048 uint32_t argi, 7049 end_func ef, 7050 struct sctp_inpcb *s_inp, 7051 uint8_t chunk_output_off) 7052 { 7053 struct sctp_iterator *it = NULL; 7054 7055 if (af == NULL) { 7056 return (-1); 7057 } 7058 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7059 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7060 SCTP_BASE_VAR(sctp_pcb_initialized)); 7061 return (-1); 7062 } 7063 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7064 SCTP_M_ITER); 7065 if (it == NULL) { 7066 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7067 return (-1); 7068 } 7069 memset(it, 0, sizeof(*it)); 7070 it->function_assoc = af; 7071 it->function_inp = inpf; 7072 if (inpf) 7073 it->done_current_ep = 0; 7074 else 7075 it->done_current_ep = 1; 7076 it->function_atend = ef; 7077 it->pointer = argp; 7078 it->val = argi; 7079 it->pcb_flags = pcb_state; 7080 it->pcb_features = pcb_features; 7081 it->asoc_state = asoc_state; 7082 it->function_inp_end = inpe; 7083 it->no_chunk_output = chunk_output_off; 7084 it->vn = curvnet; 7085 if (s_inp) { 7086 /* Assume lock is held here */ 7087 it->inp = s_inp; 7088 SCTP_INP_INCR_REF(it->inp); 7089 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7090 } else { 7091 SCTP_INP_INFO_RLOCK(); 7092 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7093 if (it->inp) { 7094 SCTP_INP_INCR_REF(it->inp); 7095 } 7096 SCTP_INP_INFO_RUNLOCK(); 7097 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7098 7099 } 7100 SCTP_IPI_ITERATOR_WQ_LOCK(); 7101 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7102 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7103 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7104 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7105 SCTP_FREE(it, SCTP_M_ITER); 7106 return (-1); 7107 } 7108 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7109 if (sctp_it_ctl.iterator_running == 0) { 7110 sctp_wakeup_iterator(); 7111 } 7112 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7113 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7114 return (0); 7115 } 7116