1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/sctp_dtrace_define.h> 49 #if defined(INET) || defined(INET6) 50 #include <netinet/udp.h> 51 #endif 52 #ifdef INET6 53 #include <netinet6/ip6_var.h> 54 #endif 55 #include <sys/sched.h> 56 #include <sys/smp.h> 57 #include <sys/unistd.h> 58 59 60 VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62 /* FIX: we don't handle multiple link local scopes */ 63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64 #ifdef INET6 65 int 66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67 { 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return (0); 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79 } 80 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100 } 101 102 /*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147 struct sctp_vrf * 148 sctp_allocate_vrf(int vrf_id) 149 { 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163 #ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165 #endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181 #ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183 #endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192 } 193 194 195 struct sctp_ifn * 196 sctp_find_ifn(void *ifn, uint32_t ifn_index) 197 { 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215 } 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 234 void 235 sctp_free_vrf(struct sctp_vrf *vrf) 236 { 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247 } 248 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 264 void 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266 { 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273 } 274 275 276 void 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278 { 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287 } 288 289 290 static void 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292 { 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310 } 311 312 313 void 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316 { 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352 out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354 } 355 356 357 void 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360 { 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396 out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398 } 399 400 401 /*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406 static void 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408 { 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418 #ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422 #endif 423 #ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427 #endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 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_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488 } 489 490 491 struct sctp_ifa * 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496 { 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505 #ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508 #endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532 #ifdef INVARIANTS 533 panic("No memory for IFN"); 534 #endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608 #ifdef INVARIANTS 609 panic("No memory for IFA"); 610 #endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623 #ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = &sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641 #endif 642 #ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = &sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661 #endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 bzero(wi, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 SCTP_WQ_ADDR_UNLOCK(); 714 715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 716 (struct sctp_inpcb *)NULL, 717 (struct sctp_tcb *)NULL, 718 (struct sctp_nets *)NULL); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724 } 725 726 void 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729 { 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739 #ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742 #endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789 #ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795 #endif 796 797 out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 bzero(wi, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 SCTP_WQ_ADDR_UNLOCK(); 826 827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 828 (struct sctp_inpcb *)NULL, 829 (struct sctp_tcb *)NULL, 830 (struct sctp_nets *)NULL); 831 } 832 return; 833 } 834 835 836 static int 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838 { 839 int loopback_scope; 840 841 #if defined(INET) 842 int ipv4_local_scope, ipv4_addr_legal; 843 844 #endif 845 #if defined(INET6) 846 int local_scope, site_scope, ipv6_addr_legal; 847 848 #endif 849 struct sctp_vrf *vrf; 850 struct sctp_ifn *sctp_ifn; 851 struct sctp_ifa *sctp_ifa; 852 853 loopback_scope = stcb->asoc.scope.loopback_scope; 854 #if defined(INET) 855 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 856 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 857 #endif 858 #if defined(INET6) 859 local_scope = stcb->asoc.scope.local_scope; 860 site_scope = stcb->asoc.scope.site_scope; 861 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 862 #endif 863 864 SCTP_IPI_ADDR_RLOCK(); 865 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 866 if (vrf == NULL) { 867 /* no vrf, no addresses */ 868 SCTP_IPI_ADDR_RUNLOCK(); 869 return (0); 870 } 871 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 872 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 873 if ((loopback_scope == 0) && 874 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 875 continue; 876 } 877 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 878 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 879 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 880 /* 881 * We allow pending addresses, where 882 * we have sent an asconf-add to be 883 * considered valid. 884 */ 885 continue; 886 } 887 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 888 continue; 889 } 890 switch (sctp_ifa->address.sa.sa_family) { 891 #ifdef INET 892 case AF_INET: 893 if (ipv4_addr_legal) { 894 struct sockaddr_in *sin, 895 *rsin; 896 897 sin = &sctp_ifa->address.sin; 898 rsin = (struct sockaddr_in *)to; 899 if ((ipv4_local_scope == 0) && 900 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 901 continue; 902 } 903 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 904 &sin->sin_addr) != 0) { 905 continue; 906 } 907 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 908 SCTP_IPI_ADDR_RUNLOCK(); 909 return (1); 910 } 911 } 912 break; 913 #endif 914 #ifdef INET6 915 case AF_INET6: 916 if (ipv6_addr_legal) { 917 struct sockaddr_in6 *sin6, 918 *rsin6; 919 920 sin6 = &sctp_ifa->address.sin6; 921 rsin6 = (struct sockaddr_in6 *)to; 922 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 923 &sin6->sin6_addr) != 0) { 924 continue; 925 } 926 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 927 if (local_scope == 0) 928 continue; 929 if (sin6->sin6_scope_id == 0) { 930 if (sa6_recoverscope(sin6) != 0) 931 continue; 932 } 933 } 934 if ((site_scope == 0) && 935 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 936 continue; 937 } 938 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 939 SCTP_IPI_ADDR_RUNLOCK(); 940 return (1); 941 } 942 } 943 break; 944 #endif 945 default: 946 /* TSNH */ 947 break; 948 } 949 } 950 } 951 } else { 952 struct sctp_laddr *laddr; 953 954 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 955 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 956 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 957 continue; 958 } 959 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 960 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 961 /* 962 * We allow pending addresses, where we have 963 * sent an asconf-add to be considered 964 * valid. 965 */ 966 continue; 967 } 968 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 969 continue; 970 } 971 switch (to->sa_family) { 972 #ifdef INET 973 case AF_INET: 974 { 975 struct sockaddr_in *sin, *rsin; 976 977 sin = &laddr->ifa->address.sin; 978 rsin = (struct sockaddr_in *)to; 979 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 980 SCTP_IPI_ADDR_RUNLOCK(); 981 return (1); 982 } 983 break; 984 } 985 #endif 986 #ifdef INET6 987 case AF_INET6: 988 { 989 struct sockaddr_in6 *sin6, *rsin6; 990 991 sin6 = &laddr->ifa->address.sin6; 992 rsin6 = (struct sockaddr_in6 *)to; 993 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (1); 996 } 997 break; 998 } 999 1000 #endif 1001 default: 1002 /* TSNH */ 1003 break; 1004 } 1005 1006 } 1007 } 1008 SCTP_IPI_ADDR_RUNLOCK(); 1009 return (0); 1010 } 1011 1012 1013 static struct sctp_tcb * 1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1015 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1016 { 1017 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1018 /* 1019 * If we support the TCP model, then we must now dig through to see 1020 * if we can find our endpoint in the list of tcp ep's. 1021 */ 1022 uint16_t lport, rport; 1023 struct sctppcbhead *ephead; 1024 struct sctp_inpcb *inp; 1025 struct sctp_laddr *laddr; 1026 struct sctp_tcb *stcb; 1027 struct sctp_nets *net; 1028 1029 if ((to == NULL) || (from == NULL)) { 1030 return (NULL); 1031 } 1032 switch (to->sa_family) { 1033 #ifdef INET 1034 case AF_INET: 1035 if (from->sa_family == AF_INET) { 1036 lport = ((struct sockaddr_in *)to)->sin_port; 1037 rport = ((struct sockaddr_in *)from)->sin_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042 #endif 1043 #ifdef INET6 1044 case AF_INET6: 1045 if (from->sa_family == AF_INET6) { 1046 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1047 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1048 } else { 1049 return (NULL); 1050 } 1051 break; 1052 #endif 1053 default: 1054 return (NULL); 1055 } 1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1057 /* 1058 * Ok now for each of the guys in this bucket we must look and see: 1059 * - Does the remote port match. - Does there single association's 1060 * addresses match this address (to). If so we update p_ep to point 1061 * to this ep and return the tcb from it. 1062 */ 1063 LIST_FOREACH(inp, ephead, sctp_hash) { 1064 SCTP_INP_RLOCK(inp); 1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 if (lport != inp->sctp_lport) { 1070 SCTP_INP_RUNLOCK(inp); 1071 continue; 1072 } 1073 switch (to->sa_family) { 1074 #ifdef INET 1075 case AF_INET: 1076 { 1077 struct sockaddr_in *sin; 1078 1079 sin = (struct sockaddr_in *)to; 1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1081 &sin->sin_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 #ifdef INET6 1089 case AF_INET6: 1090 { 1091 struct sockaddr_in6 *sin6; 1092 1093 sin6 = (struct sockaddr_in6 *)to; 1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1095 &sin6->sin6_addr) != 0) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 break; 1100 } 1101 #endif 1102 default: 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 if (inp->def_vrf_id != vrf_id) { 1107 SCTP_INP_RUNLOCK(inp); 1108 continue; 1109 } 1110 /* check to see if the ep has one of the addresses */ 1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1112 /* We are NOT bound all, so look further */ 1113 int match = 0; 1114 1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1116 1117 if (laddr->ifa == NULL) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1119 continue; 1120 } 1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1123 continue; 1124 } 1125 if (laddr->ifa->address.sa.sa_family == 1126 to->sa_family) { 1127 /* see if it matches */ 1128 #ifdef INET 1129 if (from->sa_family == AF_INET) { 1130 struct sockaddr_in *intf_addr, 1131 *sin; 1132 1133 intf_addr = &laddr->ifa->address.sin; 1134 sin = (struct sockaddr_in *)to; 1135 if (sin->sin_addr.s_addr == 1136 intf_addr->sin_addr.s_addr) { 1137 match = 1; 1138 break; 1139 } 1140 } 1141 #endif 1142 #ifdef INET6 1143 if (from->sa_family == AF_INET6) { 1144 struct sockaddr_in6 *intf_addr6; 1145 struct sockaddr_in6 *sin6; 1146 1147 sin6 = (struct sockaddr_in6 *) 1148 to; 1149 intf_addr6 = &laddr->ifa->address.sin6; 1150 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1152 intf_addr6)) { 1153 match = 1; 1154 break; 1155 } 1156 } 1157 #endif 1158 } 1159 } 1160 if (match == 0) { 1161 /* This endpoint does not have this address */ 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 } 1166 /* 1167 * Ok if we hit here the ep has the address, does it hold 1168 * the tcb? 1169 */ 1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1171 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1172 if (stcb == NULL) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 SCTP_TCB_LOCK(stcb); 1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->rport != rport) { 1183 /* remote port does not match. */ 1184 SCTP_TCB_UNLOCK(stcb); 1185 SCTP_INP_RUNLOCK(inp); 1186 continue; 1187 } 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 continue; 1197 } 1198 /* Does this TCB have a matching address? */ 1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200 1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1202 /* not the same family, can't be a match */ 1203 continue; 1204 } 1205 switch (from->sa_family) { 1206 #ifdef INET 1207 case AF_INET: 1208 { 1209 struct sockaddr_in *sin, *rsin; 1210 1211 sin = (struct sockaddr_in *)&net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)from; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 /* 1220 * Update the endpoint 1221 * pointer 1222 */ 1223 *inp_p = inp; 1224 SCTP_INP_RUNLOCK(inp); 1225 return (stcb); 1226 } 1227 break; 1228 } 1229 #endif 1230 #ifdef INET6 1231 case AF_INET6: 1232 { 1233 struct sockaddr_in6 *sin6, *rsin6; 1234 1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1236 rsin6 = (struct sockaddr_in6 *)from; 1237 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1238 rsin6)) { 1239 /* found it */ 1240 if (netp != NULL) { 1241 *netp = net; 1242 } 1243 /* 1244 * Update the endpoint 1245 * pointer 1246 */ 1247 *inp_p = inp; 1248 SCTP_INP_RUNLOCK(inp); 1249 return (stcb); 1250 } 1251 break; 1252 } 1253 #endif 1254 default: 1255 /* TSNH */ 1256 break; 1257 } 1258 } 1259 SCTP_TCB_UNLOCK(stcb); 1260 SCTP_INP_RUNLOCK(inp); 1261 } 1262 return (NULL); 1263 } 1264 1265 1266 /* 1267 * rules for use 1268 * 1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1272 * NULL. 1273 */ 1274 1275 struct sctp_tcb * 1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1278 { 1279 struct sctpasochead *head; 1280 struct sctp_inpcb *inp; 1281 struct sctp_tcb *stcb = NULL; 1282 struct sctp_nets *net; 1283 uint16_t rport; 1284 1285 inp = *inp_p; 1286 switch (remote->sa_family) { 1287 #ifdef INET 1288 case AF_INET: 1289 rport = (((struct sockaddr_in *)remote)->sin_port); 1290 break; 1291 #endif 1292 #ifdef INET6 1293 case AF_INET6: 1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1295 break; 1296 #endif 1297 default: 1298 return (NULL); 1299 } 1300 if (locked_tcb) { 1301 /* 1302 * UN-lock so we can do proper locking here this occurs when 1303 * called from load_addresses_from_init. 1304 */ 1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1306 SCTP_TCB_UNLOCK(locked_tcb); 1307 } 1308 SCTP_INP_INFO_RLOCK(); 1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1311 /*- 1312 * Now either this guy is our listener or it's the 1313 * connector. If it is the one that issued the connect, then 1314 * it's only chance is to be the first TCB in the list. If 1315 * it is the acceptor, then do the special_lookup to hash 1316 * and find the real inp. 1317 */ 1318 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1319 /* to is peer addr, from is my addr */ 1320 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1321 netp, inp->def_vrf_id); 1322 if ((stcb != NULL) && (locked_tcb == NULL)) { 1323 /* we have a locked tcb, lower refcount */ 1324 SCTP_INP_DECR_REF(inp); 1325 } 1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1328 SCTP_TCB_LOCK(locked_tcb); 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1331 } 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } else { 1335 SCTP_INP_WLOCK(inp); 1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1337 goto null_return; 1338 } 1339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1340 if (stcb == NULL) { 1341 goto null_return; 1342 } 1343 SCTP_TCB_LOCK(stcb); 1344 1345 if (stcb->rport != rport) { 1346 /* remote port does not match. */ 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1355 SCTP_TCB_UNLOCK(stcb); 1356 goto null_return; 1357 } 1358 /* now look at the list of remote addresses */ 1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1360 #ifdef INVARIANTS 1361 if (net == (TAILQ_NEXT(net, sctp_next))) { 1362 panic("Corrupt net list"); 1363 } 1364 #endif 1365 if (net->ro._l_addr.sa.sa_family != 1366 remote->sa_family) { 1367 /* not the same family */ 1368 continue; 1369 } 1370 switch (remote->sa_family) { 1371 #ifdef INET 1372 case AF_INET: 1373 { 1374 struct sockaddr_in *sin, 1375 *rsin; 1376 1377 sin = (struct sockaddr_in *) 1378 &net->ro._l_addr; 1379 rsin = (struct sockaddr_in *)remote; 1380 if (sin->sin_addr.s_addr == 1381 rsin->sin_addr.s_addr) { 1382 /* found it */ 1383 if (netp != NULL) { 1384 *netp = net; 1385 } 1386 if (locked_tcb == NULL) { 1387 SCTP_INP_DECR_REF(inp); 1388 } else if (locked_tcb != stcb) { 1389 SCTP_TCB_LOCK(locked_tcb); 1390 } 1391 if (locked_tcb) { 1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1393 } 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400 #endif 1401 #ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429 #endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1445 if (stcb->rport != rport) { 1446 /* remote port does not match */ 1447 continue; 1448 } 1449 SCTP_TCB_LOCK(stcb); 1450 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1455 SCTP_TCB_UNLOCK(stcb); 1456 continue; 1457 } 1458 /* now look at the list of remote addresses */ 1459 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1460 #ifdef INVARIANTS 1461 if (net == (TAILQ_NEXT(net, sctp_next))) { 1462 panic("Corrupt net list"); 1463 } 1464 #endif 1465 if (net->ro._l_addr.sa.sa_family != 1466 remote->sa_family) { 1467 /* not the same family */ 1468 continue; 1469 } 1470 switch (remote->sa_family) { 1471 #ifdef INET 1472 case AF_INET: 1473 { 1474 struct sockaddr_in *sin, 1475 *rsin; 1476 1477 sin = (struct sockaddr_in *) 1478 &net->ro._l_addr; 1479 rsin = (struct sockaddr_in *)remote; 1480 if (sin->sin_addr.s_addr == 1481 rsin->sin_addr.s_addr) { 1482 /* found it */ 1483 if (netp != NULL) { 1484 *netp = net; 1485 } 1486 if (locked_tcb == NULL) { 1487 SCTP_INP_DECR_REF(inp); 1488 } else if (locked_tcb != stcb) { 1489 SCTP_TCB_LOCK(locked_tcb); 1490 } 1491 if (locked_tcb) { 1492 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1493 } 1494 SCTP_INP_WUNLOCK(inp); 1495 SCTP_INP_INFO_RUNLOCK(); 1496 return (stcb); 1497 } 1498 break; 1499 } 1500 #endif 1501 #ifdef INET6 1502 case AF_INET6: 1503 { 1504 struct sockaddr_in6 *sin6, 1505 *rsin6; 1506 1507 sin6 = (struct sockaddr_in6 *) 1508 &net->ro._l_addr; 1509 rsin6 = (struct sockaddr_in6 *)remote; 1510 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1511 rsin6)) { 1512 /* found it */ 1513 if (netp != NULL) { 1514 *netp = net; 1515 } 1516 if (locked_tcb == NULL) { 1517 SCTP_INP_DECR_REF(inp); 1518 } else if (locked_tcb != stcb) { 1519 SCTP_TCB_LOCK(locked_tcb); 1520 } 1521 if (locked_tcb) { 1522 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1523 } 1524 SCTP_INP_WUNLOCK(inp); 1525 SCTP_INP_INFO_RUNLOCK(); 1526 return (stcb); 1527 } 1528 break; 1529 } 1530 #endif 1531 default: 1532 /* TSNH */ 1533 break; 1534 } 1535 } 1536 SCTP_TCB_UNLOCK(stcb); 1537 } 1538 } 1539 null_return: 1540 /* clean up for returning null */ 1541 if (locked_tcb) { 1542 SCTP_TCB_LOCK(locked_tcb); 1543 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1544 } 1545 SCTP_INP_WUNLOCK(inp); 1546 SCTP_INP_INFO_RUNLOCK(); 1547 /* not found */ 1548 return (NULL); 1549 } 1550 1551 1552 /* 1553 * Find an association for a specific endpoint using the association id given 1554 * out in the COMM_UP notification 1555 */ 1556 struct sctp_tcb * 1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1558 { 1559 /* 1560 * Use my the assoc_id to find a endpoint 1561 */ 1562 struct sctpasochead *head; 1563 struct sctp_tcb *stcb; 1564 uint32_t id; 1565 1566 if (inp == NULL) { 1567 SCTP_PRINTF("TSNH ep_associd\n"); 1568 return (NULL); 1569 } 1570 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1571 SCTP_PRINTF("TSNH ep_associd0\n"); 1572 return (NULL); 1573 } 1574 id = (uint32_t) asoc_id; 1575 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1576 if (head == NULL) { 1577 /* invalid id TSNH */ 1578 SCTP_PRINTF("TSNH ep_associd1\n"); 1579 return (NULL); 1580 } 1581 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1582 if (stcb->asoc.assoc_id == id) { 1583 if (inp != stcb->sctp_ep) { 1584 /* 1585 * some other guy has the same id active (id 1586 * collision ??). 1587 */ 1588 SCTP_PRINTF("TSNH ep_associd2\n"); 1589 continue; 1590 } 1591 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1592 continue; 1593 } 1594 if (want_lock) { 1595 SCTP_TCB_LOCK(stcb); 1596 } 1597 return (stcb); 1598 } 1599 } 1600 return (NULL); 1601 } 1602 1603 1604 struct sctp_tcb * 1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1606 { 1607 struct sctp_tcb *stcb; 1608 1609 SCTP_INP_RLOCK(inp); 1610 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1611 SCTP_INP_RUNLOCK(inp); 1612 return (stcb); 1613 } 1614 1615 1616 /* 1617 * Endpoint probe expects that the INP_INFO is locked. 1618 */ 1619 static struct sctp_inpcb * 1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1621 uint16_t lport, uint32_t vrf_id) 1622 { 1623 struct sctp_inpcb *inp; 1624 struct sctp_laddr *laddr; 1625 1626 #ifdef INET 1627 struct sockaddr_in *sin; 1628 1629 #endif 1630 #ifdef INET6 1631 struct sockaddr_in6 *sin6; 1632 struct sockaddr_in6 *intf_addr6; 1633 1634 #endif 1635 int fnd; 1636 1637 #ifdef INET 1638 sin = NULL; 1639 #endif 1640 #ifdef INET6 1641 sin6 = NULL; 1642 #endif 1643 switch (nam->sa_family) { 1644 #ifdef INET 1645 case AF_INET: 1646 sin = (struct sockaddr_in *)nam; 1647 break; 1648 #endif 1649 #ifdef INET6 1650 case AF_INET6: 1651 sin6 = (struct sockaddr_in6 *)nam; 1652 break; 1653 #endif 1654 default: 1655 /* unsupported family */ 1656 return (NULL); 1657 } 1658 1659 if (head == NULL) 1660 return (NULL); 1661 1662 LIST_FOREACH(inp, head, sctp_hash) { 1663 SCTP_INP_RLOCK(inp); 1664 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1665 SCTP_INP_RUNLOCK(inp); 1666 continue; 1667 } 1668 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1669 (inp->sctp_lport == lport)) { 1670 /* got it */ 1671 switch (nam->sa_family) { 1672 #ifdef INET 1673 case AF_INET: 1674 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1675 SCTP_IPV6_V6ONLY(inp)) { 1676 /* 1677 * IPv4 on a IPv6 socket with ONLY 1678 * IPv6 set 1679 */ 1680 SCTP_INP_RUNLOCK(inp); 1681 continue; 1682 } 1683 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1684 &sin->sin_addr) != 0) { 1685 SCTP_INP_RUNLOCK(inp); 1686 continue; 1687 } 1688 break; 1689 #endif 1690 #ifdef INET6 1691 case AF_INET6: 1692 /* 1693 * A V6 address and the endpoint is NOT 1694 * bound V6 1695 */ 1696 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1697 SCTP_INP_RUNLOCK(inp); 1698 continue; 1699 } 1700 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1701 &sin6->sin6_addr) != 0) { 1702 SCTP_INP_RUNLOCK(inp); 1703 continue; 1704 } 1705 break; 1706 #endif 1707 default: 1708 break; 1709 } 1710 /* does a VRF id match? */ 1711 fnd = 0; 1712 if (inp->def_vrf_id == vrf_id) 1713 fnd = 1; 1714 1715 SCTP_INP_RUNLOCK(inp); 1716 if (!fnd) 1717 continue; 1718 return (inp); 1719 } 1720 SCTP_INP_RUNLOCK(inp); 1721 } 1722 switch (nam->sa_family) { 1723 #ifdef INET 1724 case AF_INET: 1725 if (sin->sin_addr.s_addr == INADDR_ANY) { 1726 /* Can't hunt for one that has no address specified */ 1727 return (NULL); 1728 } 1729 break; 1730 #endif 1731 #ifdef INET6 1732 case AF_INET6: 1733 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1734 /* Can't hunt for one that has no address specified */ 1735 return (NULL); 1736 } 1737 break; 1738 #endif 1739 default: 1740 break; 1741 } 1742 /* 1743 * ok, not bound to all so see if we can find a EP bound to this 1744 * address. 1745 */ 1746 LIST_FOREACH(inp, head, sctp_hash) { 1747 SCTP_INP_RLOCK(inp); 1748 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1749 SCTP_INP_RUNLOCK(inp); 1750 continue; 1751 } 1752 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1753 SCTP_INP_RUNLOCK(inp); 1754 continue; 1755 } 1756 /* 1757 * Ok this could be a likely candidate, look at all of its 1758 * addresses 1759 */ 1760 if (inp->sctp_lport != lport) { 1761 SCTP_INP_RUNLOCK(inp); 1762 continue; 1763 } 1764 /* does a VRF id match? */ 1765 fnd = 0; 1766 if (inp->def_vrf_id == vrf_id) 1767 fnd = 1; 1768 1769 if (!fnd) { 1770 SCTP_INP_RUNLOCK(inp); 1771 continue; 1772 } 1773 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1774 if (laddr->ifa == NULL) { 1775 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1776 __func__); 1777 continue; 1778 } 1779 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1780 (void *)laddr->ifa); 1781 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1783 continue; 1784 } 1785 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1786 /* possible, see if it matches */ 1787 switch (nam->sa_family) { 1788 #ifdef INET 1789 case AF_INET: 1790 if (sin->sin_addr.s_addr == 1791 laddr->ifa->address.sin.sin_addr.s_addr) { 1792 SCTP_INP_RUNLOCK(inp); 1793 return (inp); 1794 } 1795 break; 1796 #endif 1797 #ifdef INET6 1798 case AF_INET6: 1799 intf_addr6 = &laddr->ifa->address.sin6; 1800 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1801 intf_addr6)) { 1802 SCTP_INP_RUNLOCK(inp); 1803 return (inp); 1804 } 1805 break; 1806 #endif 1807 } 1808 } 1809 } 1810 SCTP_INP_RUNLOCK(inp); 1811 } 1812 return (NULL); 1813 } 1814 1815 1816 static struct sctp_inpcb * 1817 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1818 { 1819 struct sctppcbhead *head; 1820 struct sctp_inpcb *t_inp; 1821 int fnd; 1822 1823 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1824 SCTP_BASE_INFO(hashmark))]; 1825 LIST_FOREACH(t_inp, head, sctp_hash) { 1826 if (t_inp->sctp_lport != lport) { 1827 continue; 1828 } 1829 /* is it in the VRF in question */ 1830 fnd = 0; 1831 if (t_inp->def_vrf_id == vrf_id) 1832 fnd = 1; 1833 if (!fnd) 1834 continue; 1835 1836 /* This one is in use. */ 1837 /* check the v6/v4 binding issue */ 1838 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1839 SCTP_IPV6_V6ONLY(t_inp)) { 1840 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1841 /* collision in V6 space */ 1842 return (t_inp); 1843 } else { 1844 /* inp is BOUND_V4 no conflict */ 1845 continue; 1846 } 1847 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1848 /* t_inp is bound v4 and v6, conflict always */ 1849 return (t_inp); 1850 } else { 1851 /* t_inp is bound only V4 */ 1852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1853 SCTP_IPV6_V6ONLY(inp)) { 1854 /* no conflict */ 1855 continue; 1856 } 1857 /* else fall through to conflict */ 1858 } 1859 return (t_inp); 1860 } 1861 return (NULL); 1862 } 1863 1864 1865 int 1866 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1867 { 1868 /* For 1-2-1 with port reuse */ 1869 struct sctppcbhead *head; 1870 struct sctp_inpcb *tinp, *ninp; 1871 1872 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1873 /* only works with port reuse on */ 1874 return (-1); 1875 } 1876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1877 return (0); 1878 } 1879 SCTP_INP_RUNLOCK(inp); 1880 SCTP_INP_INFO_WLOCK(); 1881 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1882 SCTP_BASE_INFO(hashmark))]; 1883 /* Kick out all non-listeners to the TCP hash */ 1884 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1885 if (tinp->sctp_lport != inp->sctp_lport) { 1886 continue; 1887 } 1888 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1889 continue; 1890 } 1891 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1892 continue; 1893 } 1894 if (tinp->sctp_socket->so_qlimit) { 1895 continue; 1896 } 1897 SCTP_INP_WLOCK(tinp); 1898 LIST_REMOVE(tinp, sctp_hash); 1899 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1900 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1901 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1902 SCTP_INP_WUNLOCK(tinp); 1903 } 1904 SCTP_INP_WLOCK(inp); 1905 /* Pull from where he was */ 1906 LIST_REMOVE(inp, sctp_hash); 1907 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1908 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1909 LIST_INSERT_HEAD(head, inp, sctp_hash); 1910 SCTP_INP_WUNLOCK(inp); 1911 SCTP_INP_RLOCK(inp); 1912 SCTP_INP_INFO_WUNLOCK(); 1913 return (0); 1914 } 1915 1916 1917 struct sctp_inpcb * 1918 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1919 uint32_t vrf_id) 1920 { 1921 /* 1922 * First we check the hash table to see if someone has this port 1923 * bound with just the port. 1924 */ 1925 struct sctp_inpcb *inp; 1926 struct sctppcbhead *head; 1927 int lport; 1928 unsigned int i; 1929 1930 #ifdef INET 1931 struct sockaddr_in *sin; 1932 1933 #endif 1934 #ifdef INET6 1935 struct sockaddr_in6 *sin6; 1936 1937 #endif 1938 1939 switch (nam->sa_family) { 1940 #ifdef INET 1941 case AF_INET: 1942 sin = (struct sockaddr_in *)nam; 1943 lport = sin->sin_port; 1944 break; 1945 #endif 1946 #ifdef INET6 1947 case AF_INET6: 1948 sin6 = (struct sockaddr_in6 *)nam; 1949 lport = sin6->sin6_port; 1950 break; 1951 #endif 1952 default: 1953 return (NULL); 1954 } 1955 /* 1956 * I could cheat here and just cast to one of the types but we will 1957 * do it right. It also provides the check against an Unsupported 1958 * type too. 1959 */ 1960 /* Find the head of the ALLADDR chain */ 1961 if (have_lock == 0) { 1962 SCTP_INP_INFO_RLOCK(); 1963 } 1964 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1965 SCTP_BASE_INFO(hashmark))]; 1966 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1967 1968 /* 1969 * If the TCP model exists it could be that the main listening 1970 * endpoint is gone but there still exists a connected socket for 1971 * this guy. If so we can return the first one that we find. This 1972 * may NOT be the correct one so the caller should be wary on the 1973 * returned INP. Currently the only caller that sets find_tcp_pool 1974 * is in bindx where we are verifying that a user CAN bind the 1975 * address. He either has bound it already, or someone else has, or 1976 * its open to bind, so this is good enough. 1977 */ 1978 if (inp == NULL && find_tcp_pool) { 1979 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1980 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1981 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1982 if (inp) { 1983 break; 1984 } 1985 } 1986 } 1987 if (inp) { 1988 SCTP_INP_INCR_REF(inp); 1989 } 1990 if (have_lock == 0) { 1991 SCTP_INP_INFO_RUNLOCK(); 1992 } 1993 return (inp); 1994 } 1995 1996 1997 /* 1998 * Find an association for an endpoint with the pointer to whom you want to 1999 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2000 * need to change the *to to some other struct like a mbuf... 2001 */ 2002 struct sctp_tcb * 2003 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2004 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2005 uint32_t vrf_id) 2006 { 2007 struct sctp_inpcb *inp = NULL; 2008 struct sctp_tcb *stcb; 2009 2010 SCTP_INP_INFO_RLOCK(); 2011 if (find_tcp_pool) { 2012 if (inp_p != NULL) { 2013 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2014 vrf_id); 2015 } else { 2016 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2017 vrf_id); 2018 } 2019 if (stcb != NULL) { 2020 SCTP_INP_INFO_RUNLOCK(); 2021 return (stcb); 2022 } 2023 } 2024 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2025 if (inp_p != NULL) { 2026 *inp_p = inp; 2027 } 2028 SCTP_INP_INFO_RUNLOCK(); 2029 if (inp == NULL) { 2030 return (NULL); 2031 } 2032 /* 2033 * ok, we have an endpoint, now lets find the assoc for it (if any) 2034 * we now place the source address or from in the to of the find 2035 * endpoint call. Since in reality this chain is used from the 2036 * inbound packet side. 2037 */ 2038 if (inp_p != NULL) { 2039 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2040 NULL); 2041 } else { 2042 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2043 NULL); 2044 } 2045 return (stcb); 2046 } 2047 2048 2049 /* 2050 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2051 * find all addresses that the sender has specified in any address list. Each 2052 * address will be used to lookup the TCB and see if one exits. 2053 */ 2054 static struct sctp_tcb * 2055 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2056 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2057 struct sockaddr *dst) 2058 { 2059 struct sctp_paramhdr *phdr, parm_buf; 2060 2061 #if defined(INET) || defined(INET6) 2062 struct sctp_tcb *stcb; 2063 uint16_t ptype; 2064 2065 #endif 2066 uint16_t plen; 2067 2068 #ifdef INET 2069 struct sockaddr_in sin4; 2070 2071 #endif 2072 #ifdef INET6 2073 struct sockaddr_in6 sin6; 2074 2075 #endif 2076 2077 #ifdef INET 2078 memset(&sin4, 0, sizeof(sin4)); 2079 sin4.sin_len = sizeof(sin4); 2080 sin4.sin_family = AF_INET; 2081 sin4.sin_port = sh->src_port; 2082 #endif 2083 #ifdef INET6 2084 memset(&sin6, 0, sizeof(sin6)); 2085 sin6.sin6_len = sizeof(sin6); 2086 sin6.sin6_family = AF_INET6; 2087 sin6.sin6_port = sh->src_port; 2088 #endif 2089 2090 offset += sizeof(struct sctp_init_chunk); 2091 2092 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2093 while (phdr != NULL) { 2094 /* now we must see if we want the parameter */ 2095 #if defined(INET) || defined(INET6) 2096 ptype = ntohs(phdr->param_type); 2097 #endif 2098 plen = ntohs(phdr->param_length); 2099 if (plen == 0) { 2100 break; 2101 } 2102 #ifdef INET 2103 if (ptype == SCTP_IPV4_ADDRESS && 2104 plen == sizeof(struct sctp_ipv4addr_param)) { 2105 /* Get the rest of the address */ 2106 struct sctp_ipv4addr_param ip4_parm, *p4; 2107 2108 phdr = sctp_get_next_param(m, offset, 2109 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2110 if (phdr == NULL) { 2111 return (NULL); 2112 } 2113 p4 = (struct sctp_ipv4addr_param *)phdr; 2114 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2115 /* look it up */ 2116 stcb = sctp_findassociation_ep_addr(inp_p, 2117 (struct sockaddr *)&sin4, netp, dst, NULL); 2118 if (stcb != NULL) { 2119 return (stcb); 2120 } 2121 } 2122 #endif 2123 #ifdef INET6 2124 if (ptype == SCTP_IPV6_ADDRESS && 2125 plen == sizeof(struct sctp_ipv6addr_param)) { 2126 /* Get the rest of the address */ 2127 struct sctp_ipv6addr_param ip6_parm, *p6; 2128 2129 phdr = sctp_get_next_param(m, offset, 2130 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2131 if (phdr == NULL) { 2132 return (NULL); 2133 } 2134 p6 = (struct sctp_ipv6addr_param *)phdr; 2135 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2136 /* look it up */ 2137 stcb = sctp_findassociation_ep_addr(inp_p, 2138 (struct sockaddr *)&sin6, netp, dst, NULL); 2139 if (stcb != NULL) { 2140 return (stcb); 2141 } 2142 } 2143 #endif 2144 offset += SCTP_SIZE32(plen); 2145 phdr = sctp_get_next_param(m, offset, &parm_buf, 2146 sizeof(parm_buf)); 2147 } 2148 return (NULL); 2149 } 2150 2151 static struct sctp_tcb * 2152 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2153 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2154 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2155 { 2156 /* 2157 * Use my vtag to hash. If we find it we then verify the source addr 2158 * is in the assoc. If all goes well we save a bit on rec of a 2159 * packet. 2160 */ 2161 struct sctpasochead *head; 2162 struct sctp_nets *net; 2163 struct sctp_tcb *stcb; 2164 2165 SCTP_INP_INFO_RLOCK(); 2166 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2167 SCTP_BASE_INFO(hashasocmark))]; 2168 LIST_FOREACH(stcb, head, sctp_asocs) { 2169 SCTP_INP_RLOCK(stcb->sctp_ep); 2170 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2171 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2172 continue; 2173 } 2174 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2175 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2176 continue; 2177 } 2178 SCTP_TCB_LOCK(stcb); 2179 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2180 if (stcb->asoc.my_vtag == vtag) { 2181 /* candidate */ 2182 if (stcb->rport != rport) { 2183 SCTP_TCB_UNLOCK(stcb); 2184 continue; 2185 } 2186 if (stcb->sctp_ep->sctp_lport != lport) { 2187 SCTP_TCB_UNLOCK(stcb); 2188 continue; 2189 } 2190 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2191 SCTP_TCB_UNLOCK(stcb); 2192 continue; 2193 } 2194 /* RRS:Need toaddr check here */ 2195 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2196 /* Endpoint does not own this address */ 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 if (remote_tag) { 2201 /* 2202 * If we have both vtags that's all we match 2203 * on 2204 */ 2205 if (stcb->asoc.peer_vtag == remote_tag) { 2206 /* 2207 * If both tags match we consider it 2208 * conclusive and check NO 2209 * source/destination addresses 2210 */ 2211 goto conclusive; 2212 } 2213 } 2214 if (skip_src_check) { 2215 conclusive: 2216 if (from) { 2217 *netp = sctp_findnet(stcb, from); 2218 } else { 2219 *netp = NULL; /* unknown */ 2220 } 2221 if (inp_p) 2222 *inp_p = stcb->sctp_ep; 2223 SCTP_INP_INFO_RUNLOCK(); 2224 return (stcb); 2225 } 2226 net = sctp_findnet(stcb, from); 2227 if (net) { 2228 /* yep its him. */ 2229 *netp = net; 2230 SCTP_STAT_INCR(sctps_vtagexpress); 2231 *inp_p = stcb->sctp_ep; 2232 SCTP_INP_INFO_RUNLOCK(); 2233 return (stcb); 2234 } else { 2235 /* 2236 * not him, this should only happen in rare 2237 * cases so I peg it. 2238 */ 2239 SCTP_STAT_INCR(sctps_vtagbogus); 2240 } 2241 } 2242 SCTP_TCB_UNLOCK(stcb); 2243 } 2244 SCTP_INP_INFO_RUNLOCK(); 2245 return (NULL); 2246 } 2247 2248 2249 /* 2250 * Find an association with the pointer to the inbound IP packet. This can be 2251 * a IPv4 or IPv6 packet. 2252 */ 2253 struct sctp_tcb * 2254 sctp_findassociation_addr(struct mbuf *m, int offset, 2255 struct sockaddr *src, struct sockaddr *dst, 2256 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2257 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2258 { 2259 int find_tcp_pool; 2260 struct sctp_tcb *stcb; 2261 struct sctp_inpcb *inp; 2262 2263 if (sh->v_tag) { 2264 /* we only go down this path if vtag is non-zero */ 2265 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2266 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2267 if (stcb) { 2268 return (stcb); 2269 } 2270 } 2271 find_tcp_pool = 0; 2272 if ((ch->chunk_type != SCTP_INITIATION) && 2273 (ch->chunk_type != SCTP_INITIATION_ACK) && 2274 (ch->chunk_type != SCTP_COOKIE_ACK) && 2275 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2276 /* Other chunk types go to the tcp pool. */ 2277 find_tcp_pool = 1; 2278 } 2279 if (inp_p) { 2280 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2281 find_tcp_pool, vrf_id); 2282 inp = *inp_p; 2283 } else { 2284 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2285 find_tcp_pool, vrf_id); 2286 } 2287 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2288 if (stcb == NULL && inp) { 2289 /* Found a EP but not this address */ 2290 if ((ch->chunk_type == SCTP_INITIATION) || 2291 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2292 /*- 2293 * special hook, we do NOT return linp or an 2294 * association that is linked to an existing 2295 * association that is under the TCP pool (i.e. no 2296 * listener exists). The endpoint finding routine 2297 * will always find a listener before examining the 2298 * TCP pool. 2299 */ 2300 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2301 if (inp_p) { 2302 *inp_p = NULL; 2303 } 2304 return (NULL); 2305 } 2306 stcb = sctp_findassociation_special_addr(m, 2307 offset, sh, &inp, netp, dst); 2308 if (inp_p != NULL) { 2309 *inp_p = inp; 2310 } 2311 } 2312 } 2313 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2314 return (stcb); 2315 } 2316 2317 /* 2318 * lookup an association by an ASCONF lookup address. 2319 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2320 */ 2321 struct sctp_tcb * 2322 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2323 struct sockaddr *dst, struct sctphdr *sh, 2324 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2325 { 2326 struct sctp_tcb *stcb; 2327 union sctp_sockstore remote_store; 2328 struct sctp_paramhdr parm_buf, *phdr; 2329 int ptype; 2330 int zero_address = 0; 2331 2332 #ifdef INET 2333 struct sockaddr_in *sin; 2334 2335 #endif 2336 #ifdef INET6 2337 struct sockaddr_in6 *sin6; 2338 2339 #endif 2340 2341 memset(&remote_store, 0, sizeof(remote_store)); 2342 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2343 &parm_buf, sizeof(struct sctp_paramhdr)); 2344 if (phdr == NULL) { 2345 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2346 __func__); 2347 return NULL; 2348 } 2349 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2350 /* get the correlation address */ 2351 switch (ptype) { 2352 #ifdef INET6 2353 case SCTP_IPV6_ADDRESS: 2354 { 2355 /* ipv6 address param */ 2356 struct sctp_ipv6addr_param *p6, p6_buf; 2357 2358 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2359 return NULL; 2360 } 2361 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2362 offset + sizeof(struct sctp_asconf_chunk), 2363 &p6_buf.ph, sizeof(*p6)); 2364 if (p6 == NULL) { 2365 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2366 __func__); 2367 return (NULL); 2368 } 2369 sin6 = &remote_store.sin6; 2370 sin6->sin6_family = AF_INET6; 2371 sin6->sin6_len = sizeof(*sin6); 2372 sin6->sin6_port = sh->src_port; 2373 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2374 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2375 zero_address = 1; 2376 break; 2377 } 2378 #endif 2379 #ifdef INET 2380 case SCTP_IPV4_ADDRESS: 2381 { 2382 /* ipv4 address param */ 2383 struct sctp_ipv4addr_param *p4, p4_buf; 2384 2385 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2386 return NULL; 2387 } 2388 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2389 offset + sizeof(struct sctp_asconf_chunk), 2390 &p4_buf.ph, sizeof(*p4)); 2391 if (p4 == NULL) { 2392 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2393 __func__); 2394 return (NULL); 2395 } 2396 sin = &remote_store.sin; 2397 sin->sin_family = AF_INET; 2398 sin->sin_len = sizeof(*sin); 2399 sin->sin_port = sh->src_port; 2400 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2401 if (sin->sin_addr.s_addr == INADDR_ANY) 2402 zero_address = 1; 2403 break; 2404 } 2405 #endif 2406 default: 2407 /* invalid address param type */ 2408 return NULL; 2409 } 2410 2411 if (zero_address) { 2412 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2413 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2414 if (stcb != NULL) { 2415 SCTP_INP_DECR_REF(*inp_p); 2416 } 2417 } else { 2418 stcb = sctp_findassociation_ep_addr(inp_p, 2419 &remote_store.sa, netp, 2420 dst, NULL); 2421 } 2422 return (stcb); 2423 } 2424 2425 2426 /* 2427 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2428 * addresses. This way if we don't get a bind we by default pick a ephemeral 2429 * port with all addresses bound. 2430 */ 2431 int 2432 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2433 { 2434 /* 2435 * we get called when a new endpoint starts up. We need to allocate 2436 * the sctp_inpcb structure from the zone and init it. Mark it as 2437 * unbound and find a port that we can use as an ephemeral with 2438 * INADDR_ANY. If the user binds later no problem we can then add in 2439 * the specific addresses. And setup the default parameters for the 2440 * EP. 2441 */ 2442 int i, error; 2443 struct sctp_inpcb *inp; 2444 struct sctp_pcb *m; 2445 struct timeval time; 2446 sctp_sharedkey_t *null_key; 2447 2448 error = 0; 2449 2450 SCTP_INP_INFO_WLOCK(); 2451 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2452 if (inp == NULL) { 2453 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2454 SCTP_INP_INFO_WUNLOCK(); 2455 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2456 return (ENOBUFS); 2457 } 2458 /* zap it */ 2459 bzero(inp, sizeof(*inp)); 2460 2461 /* bump generations */ 2462 /* setup socket pointers */ 2463 inp->sctp_socket = so; 2464 inp->ip_inp.inp.inp_socket = so; 2465 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2466 #ifdef INET6 2467 if (INP_SOCKAF(so) == AF_INET6) { 2468 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2469 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2470 } 2471 if (MODULE_GLOBAL(ip6_v6only)) { 2472 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2473 } 2474 } 2475 #endif 2476 inp->sctp_associd_counter = 1; 2477 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2478 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2479 inp->max_cwnd = 0; 2480 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2481 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2482 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2483 inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable); 2484 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2485 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2486 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2487 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2488 inp->fibnum = so->so_fibnum; 2489 /* init the small hash table we use to track asocid <-> tcb */ 2490 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2491 if (inp->sctp_asocidhash == NULL) { 2492 crfree(inp->ip_inp.inp.inp_cred); 2493 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2494 SCTP_INP_INFO_WUNLOCK(); 2495 return (ENOBUFS); 2496 } 2497 #ifdef IPSEC 2498 error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp); 2499 if (error != 0) { 2500 crfree(inp->ip_inp.inp.inp_cred); 2501 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2502 SCTP_INP_INFO_WUNLOCK(); 2503 return error; 2504 } 2505 #endif /* IPSEC */ 2506 SCTP_INCR_EP_COUNT(); 2507 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2508 SCTP_INP_INFO_WUNLOCK(); 2509 2510 so->so_pcb = (caddr_t)inp; 2511 2512 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2513 /* UDP style socket */ 2514 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2515 SCTP_PCB_FLAGS_UNBOUND); 2516 /* Be sure it is NON-BLOCKING IO for UDP */ 2517 /* SCTP_SET_SO_NBIO(so); */ 2518 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2519 /* TCP style socket */ 2520 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2521 SCTP_PCB_FLAGS_UNBOUND); 2522 /* Be sure we have blocking IO by default */ 2523 SCTP_CLEAR_SO_NBIO(so); 2524 } else { 2525 /* 2526 * unsupported socket type (RAW, etc)- in case we missed it 2527 * in protosw 2528 */ 2529 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2530 so->so_pcb = NULL; 2531 crfree(inp->ip_inp.inp.inp_cred); 2532 #ifdef IPSEC 2533 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2534 #endif 2535 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2536 return (EOPNOTSUPP); 2537 } 2538 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2539 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2540 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2541 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2542 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2543 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2544 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2545 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2546 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2547 } 2548 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2549 &inp->sctp_hashmark); 2550 if (inp->sctp_tcbhash == NULL) { 2551 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2552 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2553 so->so_pcb = NULL; 2554 crfree(inp->ip_inp.inp.inp_cred); 2555 #ifdef IPSEC 2556 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2557 #endif 2558 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2559 return (ENOBUFS); 2560 } 2561 inp->def_vrf_id = vrf_id; 2562 2563 SCTP_INP_INFO_WLOCK(); 2564 SCTP_INP_LOCK_INIT(inp); 2565 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2566 SCTP_INP_READ_INIT(inp); 2567 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2568 /* lock the new ep */ 2569 SCTP_INP_WLOCK(inp); 2570 2571 /* add it to the info area */ 2572 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2573 SCTP_INP_INFO_WUNLOCK(); 2574 2575 TAILQ_INIT(&inp->read_queue); 2576 LIST_INIT(&inp->sctp_addr_list); 2577 2578 LIST_INIT(&inp->sctp_asoc_list); 2579 2580 #ifdef SCTP_TRACK_FREED_ASOCS 2581 /* TEMP CODE */ 2582 LIST_INIT(&inp->sctp_asoc_free_list); 2583 #endif 2584 /* Init the timer structure for signature change */ 2585 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2586 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2587 2588 /* now init the actual endpoint default data */ 2589 m = &inp->sctp_ep; 2590 2591 /* setup the base timeout information */ 2592 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2593 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2594 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2595 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2596 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2597 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2598 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2599 /* all max/min max are in ms */ 2600 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2601 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2602 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2603 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2604 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2605 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2606 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2607 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2608 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2609 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2610 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2611 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2612 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2613 2614 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2615 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2616 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2617 /* number of streams to pre-open on a association */ 2618 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2619 2620 /* Add adaptation cookie */ 2621 m->adaptation_layer_indicator = 0; 2622 m->adaptation_layer_indicator_provided = 0; 2623 2624 /* seed random number generator */ 2625 m->random_counter = 1; 2626 m->store_at = SCTP_SIGNATURE_SIZE; 2627 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2628 sctp_fill_random_store(m); 2629 2630 /* Minimum cookie size */ 2631 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2632 sizeof(struct sctp_state_cookie); 2633 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2634 2635 /* Setup the initial secret */ 2636 (void)SCTP_GETTIME_TIMEVAL(&time); 2637 m->time_of_secret_change = time.tv_sec; 2638 2639 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2640 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2641 } 2642 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2643 2644 /* How long is a cookie good for ? */ 2645 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2646 /* 2647 * Initialize authentication parameters 2648 */ 2649 m->local_hmacs = sctp_default_supported_hmaclist(); 2650 m->local_auth_chunks = sctp_alloc_chunklist(); 2651 if (inp->asconf_supported) { 2652 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2653 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2654 } 2655 m->default_dscp = 0; 2656 #ifdef INET6 2657 m->default_flowlabel = 0; 2658 #endif 2659 m->port = 0; /* encapsulation disabled by default */ 2660 LIST_INIT(&m->shared_keys); 2661 /* add default NULL key as key id 0 */ 2662 null_key = sctp_alloc_sharedkey(); 2663 sctp_insert_sharedkey(&m->shared_keys, null_key); 2664 SCTP_INP_WUNLOCK(inp); 2665 #ifdef SCTP_LOG_CLOSING 2666 sctp_log_closing(inp, NULL, 12); 2667 #endif 2668 return (error); 2669 } 2670 2671 2672 void 2673 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2674 struct sctp_tcb *stcb) 2675 { 2676 struct sctp_nets *net; 2677 uint16_t lport, rport; 2678 struct sctppcbhead *head; 2679 struct sctp_laddr *laddr, *oladdr; 2680 2681 atomic_add_int(&stcb->asoc.refcnt, 1); 2682 SCTP_TCB_UNLOCK(stcb); 2683 SCTP_INP_INFO_WLOCK(); 2684 SCTP_INP_WLOCK(old_inp); 2685 SCTP_INP_WLOCK(new_inp); 2686 SCTP_TCB_LOCK(stcb); 2687 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2688 2689 new_inp->sctp_ep.time_of_secret_change = 2690 old_inp->sctp_ep.time_of_secret_change; 2691 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2692 sizeof(old_inp->sctp_ep.secret_key)); 2693 new_inp->sctp_ep.current_secret_number = 2694 old_inp->sctp_ep.current_secret_number; 2695 new_inp->sctp_ep.last_secret_number = 2696 old_inp->sctp_ep.last_secret_number; 2697 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2698 2699 /* make it so new data pours into the new socket */ 2700 stcb->sctp_socket = new_inp->sctp_socket; 2701 stcb->sctp_ep = new_inp; 2702 2703 /* Copy the port across */ 2704 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2705 rport = stcb->rport; 2706 /* Pull the tcb from the old association */ 2707 LIST_REMOVE(stcb, sctp_tcbhash); 2708 LIST_REMOVE(stcb, sctp_tcblist); 2709 if (stcb->asoc.in_asocid_hash) { 2710 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2711 } 2712 /* Now insert the new_inp into the TCP connected hash */ 2713 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2714 2715 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2716 /* Its safe to access */ 2717 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2718 2719 /* Now move the tcb into the endpoint list */ 2720 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2721 /* 2722 * Question, do we even need to worry about the ep-hash since we 2723 * only have one connection? Probably not :> so lets get rid of it 2724 * and not suck up any kernel memory in that. 2725 */ 2726 if (stcb->asoc.in_asocid_hash) { 2727 struct sctpasochead *lhd; 2728 2729 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2730 new_inp->hashasocidmark)]; 2731 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2732 } 2733 /* Ok. Let's restart timer. */ 2734 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2735 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2736 stcb, net); 2737 } 2738 2739 SCTP_INP_INFO_WUNLOCK(); 2740 if (new_inp->sctp_tcbhash != NULL) { 2741 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2742 new_inp->sctp_tcbhash = NULL; 2743 } 2744 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2745 /* Subset bound, so copy in the laddr list from the old_inp */ 2746 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2747 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2748 if (laddr == NULL) { 2749 /* 2750 * Gak, what can we do? This assoc is really 2751 * HOSED. We probably should send an abort 2752 * here. 2753 */ 2754 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2755 continue; 2756 } 2757 SCTP_INCR_LADDR_COUNT(); 2758 bzero(laddr, sizeof(*laddr)); 2759 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2760 laddr->ifa = oladdr->ifa; 2761 atomic_add_int(&laddr->ifa->refcount, 1); 2762 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2763 sctp_nxt_addr); 2764 new_inp->laddr_count++; 2765 if (oladdr == stcb->asoc.last_used_address) { 2766 stcb->asoc.last_used_address = laddr; 2767 } 2768 } 2769 } 2770 /* 2771 * Now any running timers need to be adjusted since we really don't 2772 * care if they are running or not just blast in the new_inp into 2773 * all of them. 2774 */ 2775 2776 stcb->asoc.dack_timer.ep = (void *)new_inp; 2777 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2778 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2779 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2780 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2781 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2782 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2783 /* now what about the nets? */ 2784 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2785 net->pmtu_timer.ep = (void *)new_inp; 2786 net->hb_timer.ep = (void *)new_inp; 2787 net->rxt_timer.ep = (void *)new_inp; 2788 } 2789 SCTP_INP_WUNLOCK(new_inp); 2790 SCTP_INP_WUNLOCK(old_inp); 2791 } 2792 2793 2794 2795 2796 /* sctp_ifap is used to bypass normal local address validation checks */ 2797 int 2798 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2799 struct sctp_ifa *sctp_ifap, struct thread *p) 2800 { 2801 /* bind a ep to a socket address */ 2802 struct sctppcbhead *head; 2803 struct sctp_inpcb *inp, *inp_tmp; 2804 struct inpcb *ip_inp; 2805 int port_reuse_active = 0; 2806 int bindall; 2807 uint16_t lport; 2808 int error; 2809 uint32_t vrf_id; 2810 2811 lport = 0; 2812 bindall = 1; 2813 inp = (struct sctp_inpcb *)so->so_pcb; 2814 ip_inp = (struct inpcb *)so->so_pcb; 2815 #ifdef SCTP_DEBUG 2816 if (addr) { 2817 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2818 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2819 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2820 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2821 } 2822 #endif 2823 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2824 /* already did a bind, subsequent binds NOT allowed ! */ 2825 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2826 return (EINVAL); 2827 } 2828 #ifdef INVARIANTS 2829 if (p == NULL) 2830 panic("null proc/thread"); 2831 #endif 2832 if (addr != NULL) { 2833 switch (addr->sa_family) { 2834 #ifdef INET 2835 case AF_INET: 2836 { 2837 struct sockaddr_in *sin; 2838 2839 /* IPV6_V6ONLY socket? */ 2840 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2841 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2842 return (EINVAL); 2843 } 2844 if (addr->sa_len != sizeof(*sin)) { 2845 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2846 return (EINVAL); 2847 } 2848 sin = (struct sockaddr_in *)addr; 2849 lport = sin->sin_port; 2850 /* 2851 * For LOOPBACK the prison_local_ip4() call 2852 * will transmute the ip address to the 2853 * proper value. 2854 */ 2855 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2856 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2857 return (error); 2858 } 2859 if (sin->sin_addr.s_addr != INADDR_ANY) { 2860 bindall = 0; 2861 } 2862 break; 2863 } 2864 #endif 2865 #ifdef INET6 2866 case AF_INET6: 2867 { 2868 /* 2869 * Only for pure IPv6 Address. (No IPv4 2870 * Mapped!) 2871 */ 2872 struct sockaddr_in6 *sin6; 2873 2874 sin6 = (struct sockaddr_in6 *)addr; 2875 2876 if (addr->sa_len != sizeof(*sin6)) { 2877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2878 return (EINVAL); 2879 } 2880 lport = sin6->sin6_port; 2881 /* 2882 * For LOOPBACK the prison_local_ip6() call 2883 * will transmute the ipv6 address to the 2884 * proper value. 2885 */ 2886 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2887 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2888 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2889 return (error); 2890 } 2891 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2892 bindall = 0; 2893 /* KAME hack: embed scopeid */ 2894 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2895 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2896 return (EINVAL); 2897 } 2898 } 2899 /* this must be cleared for ifa_ifwithaddr() */ 2900 sin6->sin6_scope_id = 0; 2901 break; 2902 } 2903 #endif 2904 default: 2905 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2906 return (EAFNOSUPPORT); 2907 } 2908 } 2909 SCTP_INP_INFO_WLOCK(); 2910 SCTP_INP_WLOCK(inp); 2911 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2912 vrf_id = inp->def_vrf_id; 2913 2914 /* increase our count due to the unlock we do */ 2915 SCTP_INP_INCR_REF(inp); 2916 if (lport) { 2917 /* 2918 * Did the caller specify a port? if so we must see if an ep 2919 * already has this one bound. 2920 */ 2921 /* got to be root to get at low ports */ 2922 if (ntohs(lport) < IPPORT_RESERVED) { 2923 if (p && (error = 2924 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2925 )) { 2926 SCTP_INP_DECR_REF(inp); 2927 SCTP_INP_WUNLOCK(inp); 2928 SCTP_INP_INFO_WUNLOCK(); 2929 return (error); 2930 } 2931 } 2932 SCTP_INP_WUNLOCK(inp); 2933 if (bindall) { 2934 vrf_id = inp->def_vrf_id; 2935 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2936 if (inp_tmp != NULL) { 2937 /* 2938 * lock guy returned and lower count note 2939 * that we are not bound so inp_tmp should 2940 * NEVER be inp. And it is this inp 2941 * (inp_tmp) that gets the reference bump, 2942 * so we must lower it. 2943 */ 2944 SCTP_INP_DECR_REF(inp_tmp); 2945 /* unlock info */ 2946 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2947 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2948 /* 2949 * Ok, must be one-2-one and 2950 * allowing port re-use 2951 */ 2952 port_reuse_active = 1; 2953 goto continue_anyway; 2954 } 2955 SCTP_INP_DECR_REF(inp); 2956 SCTP_INP_INFO_WUNLOCK(); 2957 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2958 return (EADDRINUSE); 2959 } 2960 } else { 2961 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2962 if (inp_tmp != NULL) { 2963 /* 2964 * lock guy returned and lower count note 2965 * that we are not bound so inp_tmp should 2966 * NEVER be inp. And it is this inp 2967 * (inp_tmp) that gets the reference bump, 2968 * so we must lower it. 2969 */ 2970 SCTP_INP_DECR_REF(inp_tmp); 2971 /* unlock info */ 2972 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2973 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2974 /* 2975 * Ok, must be one-2-one and 2976 * allowing port re-use 2977 */ 2978 port_reuse_active = 1; 2979 goto continue_anyway; 2980 } 2981 SCTP_INP_DECR_REF(inp); 2982 SCTP_INP_INFO_WUNLOCK(); 2983 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2984 return (EADDRINUSE); 2985 } 2986 } 2987 continue_anyway: 2988 SCTP_INP_WLOCK(inp); 2989 if (bindall) { 2990 /* verify that no lport is not used by a singleton */ 2991 if ((port_reuse_active == 0) && 2992 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2993 /* Sorry someone already has this one bound */ 2994 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2995 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2996 port_reuse_active = 1; 2997 } else { 2998 SCTP_INP_DECR_REF(inp); 2999 SCTP_INP_WUNLOCK(inp); 3000 SCTP_INP_INFO_WUNLOCK(); 3001 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3002 return (EADDRINUSE); 3003 } 3004 } 3005 } 3006 } else { 3007 uint16_t first, last, candidate; 3008 uint16_t count; 3009 int done; 3010 3011 if (ip_inp->inp_flags & INP_HIGHPORT) { 3012 first = MODULE_GLOBAL(ipport_hifirstauto); 3013 last = MODULE_GLOBAL(ipport_hilastauto); 3014 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3015 if (p && (error = 3016 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3017 )) { 3018 SCTP_INP_DECR_REF(inp); 3019 SCTP_INP_WUNLOCK(inp); 3020 SCTP_INP_INFO_WUNLOCK(); 3021 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3022 return (error); 3023 } 3024 first = MODULE_GLOBAL(ipport_lowfirstauto); 3025 last = MODULE_GLOBAL(ipport_lowlastauto); 3026 } else { 3027 first = MODULE_GLOBAL(ipport_firstauto); 3028 last = MODULE_GLOBAL(ipport_lastauto); 3029 } 3030 if (first > last) { 3031 uint16_t temp; 3032 3033 temp = first; 3034 first = last; 3035 last = temp; 3036 } 3037 count = last - first + 1; /* number of candidates */ 3038 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3039 3040 done = 0; 3041 while (!done) { 3042 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3043 done = 1; 3044 } 3045 if (!done) { 3046 if (--count == 0) { 3047 SCTP_INP_DECR_REF(inp); 3048 SCTP_INP_WUNLOCK(inp); 3049 SCTP_INP_INFO_WUNLOCK(); 3050 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3051 return (EADDRINUSE); 3052 } 3053 if (candidate == last) 3054 candidate = first; 3055 else 3056 candidate = candidate + 1; 3057 } 3058 } 3059 lport = htons(candidate); 3060 } 3061 SCTP_INP_DECR_REF(inp); 3062 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3063 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3064 /* 3065 * this really should not happen. The guy did a non-blocking 3066 * bind and then did a close at the same time. 3067 */ 3068 SCTP_INP_WUNLOCK(inp); 3069 SCTP_INP_INFO_WUNLOCK(); 3070 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3071 return (EINVAL); 3072 } 3073 /* ok we look clear to give out this port, so lets setup the binding */ 3074 if (bindall) { 3075 /* binding to all addresses, so just set in the proper flags */ 3076 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3077 /* set the automatic addr changes from kernel flag */ 3078 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3079 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3080 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3081 } else { 3082 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3083 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3084 } 3085 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3086 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3087 } else { 3088 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3089 } 3090 /* 3091 * set the automatic mobility_base from kernel flag (by 3092 * micchie) 3093 */ 3094 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3095 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3096 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3097 } else { 3098 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3099 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3100 } 3101 /* 3102 * set the automatic mobility_fasthandoff from kernel flag 3103 * (by micchie) 3104 */ 3105 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3106 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3107 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3108 } else { 3109 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3110 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3111 } 3112 } else { 3113 /* 3114 * bind specific, make sure flags is off and add a new 3115 * address structure to the sctp_addr_list inside the ep 3116 * structure. 3117 * 3118 * We will need to allocate one and insert it at the head. The 3119 * socketopt call can just insert new addresses in there as 3120 * well. It will also have to do the embed scope kame hack 3121 * too (before adding). 3122 */ 3123 struct sctp_ifa *ifa; 3124 union sctp_sockstore store; 3125 3126 memset(&store, 0, sizeof(store)); 3127 switch (addr->sa_family) { 3128 #ifdef INET 3129 case AF_INET: 3130 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3131 store.sin.sin_port = 0; 3132 break; 3133 #endif 3134 #ifdef INET6 3135 case AF_INET6: 3136 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3137 store.sin6.sin6_port = 0; 3138 break; 3139 #endif 3140 default: 3141 break; 3142 } 3143 /* 3144 * first find the interface with the bound address need to 3145 * zero out the port to find the address! yuck! can't do 3146 * this earlier since need port for sctp_pcb_findep() 3147 */ 3148 if (sctp_ifap != NULL) { 3149 ifa = sctp_ifap; 3150 } else { 3151 /* 3152 * Note for BSD we hit here always other O/S's will 3153 * pass things in via the sctp_ifap argument 3154 * (Panda). 3155 */ 3156 ifa = sctp_find_ifa_by_addr(&store.sa, 3157 vrf_id, SCTP_ADDR_NOT_LOCKED); 3158 } 3159 if (ifa == NULL) { 3160 /* Can't find an interface with that address */ 3161 SCTP_INP_WUNLOCK(inp); 3162 SCTP_INP_INFO_WUNLOCK(); 3163 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3164 return (EADDRNOTAVAIL); 3165 } 3166 #ifdef INET6 3167 if (addr->sa_family == AF_INET6) { 3168 /* GAK, more FIXME IFA lock? */ 3169 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3170 /* Can't bind a non-existent addr. */ 3171 SCTP_INP_WUNLOCK(inp); 3172 SCTP_INP_INFO_WUNLOCK(); 3173 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3174 return (EINVAL); 3175 } 3176 } 3177 #endif 3178 /* we're not bound all */ 3179 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3180 /* allow bindx() to send ASCONF's for binding changes */ 3181 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3182 /* clear automatic addr changes from kernel flag */ 3183 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3184 3185 /* add this address to the endpoint list */ 3186 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3187 if (error != 0) { 3188 SCTP_INP_WUNLOCK(inp); 3189 SCTP_INP_INFO_WUNLOCK(); 3190 return (error); 3191 } 3192 inp->laddr_count++; 3193 } 3194 /* find the bucket */ 3195 if (port_reuse_active) { 3196 /* Put it into tcp 1-2-1 hash */ 3197 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3198 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3199 } else { 3200 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3201 } 3202 /* put it in the bucket */ 3203 LIST_INSERT_HEAD(head, inp, sctp_hash); 3204 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3205 (void *)head, ntohs(lport), port_reuse_active); 3206 /* set in the port */ 3207 inp->sctp_lport = lport; 3208 3209 /* turn off just the unbound flag */ 3210 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3211 SCTP_INP_WUNLOCK(inp); 3212 SCTP_INP_INFO_WUNLOCK(); 3213 return (0); 3214 } 3215 3216 3217 static void 3218 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3219 { 3220 struct sctp_iterator *it, *nit; 3221 3222 /* 3223 * We enter with the only the ITERATOR_LOCK in place and a write 3224 * lock on the inp_info stuff. 3225 */ 3226 it = sctp_it_ctl.cur_it; 3227 if (it && (it->vn != curvnet)) { 3228 /* Its not looking at our VNET */ 3229 return; 3230 } 3231 if (it && (it->inp == inp)) { 3232 /* 3233 * This is tricky and we hold the iterator lock, but when it 3234 * returns and gets the lock (when we release it) the 3235 * iterator will try to operate on inp. We need to stop that 3236 * from happening. But of course the iterator has a 3237 * reference on the stcb and inp. We can mark it and it will 3238 * stop. 3239 * 3240 * If its a single iterator situation, we set the end iterator 3241 * flag. Otherwise we set the iterator to go to the next 3242 * inp. 3243 * 3244 */ 3245 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3246 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3247 } else { 3248 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3249 } 3250 } 3251 /* 3252 * Now go through and remove any single reference to our inp that 3253 * may be still pending on the list 3254 */ 3255 SCTP_IPI_ITERATOR_WQ_LOCK(); 3256 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3257 if (it->vn != curvnet) { 3258 continue; 3259 } 3260 if (it->inp == inp) { 3261 /* This one points to me is it inp specific? */ 3262 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3263 /* Remove and free this one */ 3264 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3265 it, sctp_nxt_itr); 3266 if (it->function_atend != NULL) { 3267 (*it->function_atend) (it->pointer, it->val); 3268 } 3269 SCTP_FREE(it, SCTP_M_ITER); 3270 } else { 3271 it->inp = LIST_NEXT(it->inp, sctp_list); 3272 if (it->inp) { 3273 SCTP_INP_INCR_REF(it->inp); 3274 } 3275 } 3276 /* 3277 * When its put in the refcnt is incremented so decr 3278 * it 3279 */ 3280 SCTP_INP_DECR_REF(inp); 3281 } 3282 } 3283 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3284 } 3285 3286 /* release sctp_inpcb unbind the port */ 3287 void 3288 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3289 { 3290 /* 3291 * Here we free a endpoint. We must find it (if it is in the Hash 3292 * table) and remove it from there. Then we must also find it in the 3293 * overall list and remove it from there. After all removals are 3294 * complete then any timer has to be stopped. Then start the actual 3295 * freeing. a) Any local lists. b) Any associations. c) The hash of 3296 * all associations. d) finally the ep itself. 3297 */ 3298 struct sctp_tcb *asoc, *nasoc; 3299 struct sctp_laddr *laddr, *nladdr; 3300 struct inpcb *ip_pcb; 3301 struct socket *so; 3302 int being_refed = 0; 3303 struct sctp_queued_to_read *sq, *nsq; 3304 int cnt; 3305 sctp_sharedkey_t *shared_key, *nshared_key; 3306 3307 3308 #ifdef SCTP_LOG_CLOSING 3309 sctp_log_closing(inp, NULL, 0); 3310 #endif 3311 SCTP_ITERATOR_LOCK(); 3312 /* mark any iterators on the list or being processed */ 3313 sctp_iterator_inp_being_freed(inp); 3314 SCTP_ITERATOR_UNLOCK(); 3315 so = inp->sctp_socket; 3316 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3317 /* been here before.. eeks.. get out of here */ 3318 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3319 #ifdef SCTP_LOG_CLOSING 3320 sctp_log_closing(inp, NULL, 1); 3321 #endif 3322 return; 3323 } 3324 SCTP_ASOC_CREATE_LOCK(inp); 3325 SCTP_INP_INFO_WLOCK(); 3326 3327 SCTP_INP_WLOCK(inp); 3328 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3329 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3330 /* socket is gone, so no more wakeups allowed */ 3331 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3332 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3333 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3334 3335 } 3336 /* First time through we have the socket lock, after that no more. */ 3337 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3338 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3339 3340 if (inp->control) { 3341 sctp_m_freem(inp->control); 3342 inp->control = NULL; 3343 } 3344 if (inp->pkt) { 3345 sctp_m_freem(inp->pkt); 3346 inp->pkt = NULL; 3347 } 3348 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3349 * here but I will be nice :> (i.e. 3350 * ip_pcb = ep;) */ 3351 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3352 int cnt_in_sd; 3353 3354 cnt_in_sd = 0; 3355 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3356 SCTP_TCB_LOCK(asoc); 3357 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3358 /* Skip guys being freed */ 3359 cnt_in_sd++; 3360 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3361 /* 3362 * Special case - we did not start a 3363 * kill timer on the asoc due to it 3364 * was not closed. So go ahead and 3365 * start it now. 3366 */ 3367 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3368 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3369 } 3370 SCTP_TCB_UNLOCK(asoc); 3371 continue; 3372 } 3373 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3374 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3375 (asoc->asoc.total_output_queue_size == 0)) { 3376 /* 3377 * If we have data in queue, we don't want 3378 * to just free since the app may have done, 3379 * send()/close or connect/send/close. And 3380 * it wants the data to get across first. 3381 */ 3382 /* Just abandon things in the front states */ 3383 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3384 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3385 cnt_in_sd++; 3386 } 3387 continue; 3388 } 3389 /* Disconnect the socket please */ 3390 asoc->sctp_socket = NULL; 3391 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3392 if ((asoc->asoc.size_on_reasm_queue > 0) || 3393 (asoc->asoc.control_pdapi) || 3394 (asoc->asoc.size_on_all_streams > 0) || 3395 (so && (so->so_rcv.sb_cc > 0))) { 3396 /* Left with Data unread */ 3397 struct mbuf *op_err; 3398 3399 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3400 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3401 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3402 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3403 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3404 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3405 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3406 } 3407 if (sctp_free_assoc(inp, asoc, 3408 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3409 cnt_in_sd++; 3410 } 3411 continue; 3412 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3413 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3414 (asoc->asoc.stream_queue_cnt == 0)) { 3415 if (asoc->asoc.locked_on_sending) { 3416 goto abort_anyway; 3417 } 3418 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3419 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3420 struct sctp_nets *netp; 3421 3422 /* 3423 * there is nothing queued to send, 3424 * so I send shutdown 3425 */ 3426 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3427 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3428 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3429 } 3430 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3431 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3432 sctp_stop_timers_for_shutdown(asoc); 3433 if (asoc->asoc.alternate) { 3434 netp = asoc->asoc.alternate; 3435 } else { 3436 netp = asoc->asoc.primary_destination; 3437 } 3438 sctp_send_shutdown(asoc, netp); 3439 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3440 netp); 3441 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3442 asoc->asoc.primary_destination); 3443 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3444 } 3445 } else { 3446 /* mark into shutdown pending */ 3447 struct sctp_stream_queue_pending *sp; 3448 3449 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3450 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3451 asoc->asoc.primary_destination); 3452 if (asoc->asoc.locked_on_sending) { 3453 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3454 sctp_streamhead); 3455 if (sp == NULL) { 3456 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3457 (void *)asoc->asoc.locked_on_sending, 3458 asoc->asoc.locked_on_sending->stream_no); 3459 } else { 3460 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3461 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3462 } 3463 } 3464 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3465 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3466 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3467 struct mbuf *op_err; 3468 3469 abort_anyway: 3470 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3471 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3472 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3473 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3474 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3475 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3476 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3477 } 3478 if (sctp_free_assoc(inp, asoc, 3479 SCTP_PCBFREE_NOFORCE, 3480 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3481 cnt_in_sd++; 3482 } 3483 continue; 3484 } else { 3485 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3486 } 3487 } 3488 cnt_in_sd++; 3489 SCTP_TCB_UNLOCK(asoc); 3490 } 3491 /* now is there some left in our SHUTDOWN state? */ 3492 if (cnt_in_sd) { 3493 #ifdef SCTP_LOG_CLOSING 3494 sctp_log_closing(inp, NULL, 2); 3495 #endif 3496 inp->sctp_socket = NULL; 3497 SCTP_INP_WUNLOCK(inp); 3498 SCTP_ASOC_CREATE_UNLOCK(inp); 3499 SCTP_INP_INFO_WUNLOCK(); 3500 return; 3501 } 3502 } 3503 inp->sctp_socket = NULL; 3504 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3505 SCTP_PCB_FLAGS_UNBOUND) { 3506 /* 3507 * ok, this guy has been bound. It's port is somewhere in 3508 * the SCTP_BASE_INFO(hash table). Remove it! 3509 */ 3510 LIST_REMOVE(inp, sctp_hash); 3511 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3512 } 3513 /* 3514 * If there is a timer running to kill us, forget it, since it may 3515 * have a contest on the INP lock.. which would cause us to die ... 3516 */ 3517 cnt = 0; 3518 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3519 SCTP_TCB_LOCK(asoc); 3520 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3521 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3522 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3523 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3524 } 3525 cnt++; 3526 SCTP_TCB_UNLOCK(asoc); 3527 continue; 3528 } 3529 /* Free associations that are NOT killing us */ 3530 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3531 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3532 struct mbuf *op_err; 3533 3534 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3535 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3536 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3537 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3538 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3539 cnt++; 3540 SCTP_TCB_UNLOCK(asoc); 3541 continue; 3542 } 3543 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3544 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3545 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3546 } 3547 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3548 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3549 cnt++; 3550 } 3551 } 3552 if (cnt) { 3553 /* Ok we have someone out there that will kill us */ 3554 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3555 #ifdef SCTP_LOG_CLOSING 3556 sctp_log_closing(inp, NULL, 3); 3557 #endif 3558 SCTP_INP_WUNLOCK(inp); 3559 SCTP_ASOC_CREATE_UNLOCK(inp); 3560 SCTP_INP_INFO_WUNLOCK(); 3561 return; 3562 } 3563 if (SCTP_INP_LOCK_CONTENDED(inp)) 3564 being_refed++; 3565 if (SCTP_INP_READ_CONTENDED(inp)) 3566 being_refed++; 3567 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3568 being_refed++; 3569 3570 if ((inp->refcount) || 3571 (being_refed) || 3572 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3573 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3574 #ifdef SCTP_LOG_CLOSING 3575 sctp_log_closing(inp, NULL, 4); 3576 #endif 3577 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3578 SCTP_INP_WUNLOCK(inp); 3579 SCTP_ASOC_CREATE_UNLOCK(inp); 3580 SCTP_INP_INFO_WUNLOCK(); 3581 return; 3582 } 3583 inp->sctp_ep.signature_change.type = 0; 3584 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3585 /* 3586 * Remove it from the list .. last thing we need a lock for. 3587 */ 3588 LIST_REMOVE(inp, sctp_list); 3589 SCTP_INP_WUNLOCK(inp); 3590 SCTP_ASOC_CREATE_UNLOCK(inp); 3591 SCTP_INP_INFO_WUNLOCK(); 3592 /* 3593 * Now we release all locks. Since this INP cannot be found anymore 3594 * except possibly by the kill timer that might be running. We call 3595 * the drain function here. It should hit the case were it sees the 3596 * ACTIVE flag cleared and exit out freeing us to proceed and 3597 * destroy everything. 3598 */ 3599 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3600 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3601 } else { 3602 /* Probably un-needed */ 3603 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3604 } 3605 3606 #ifdef SCTP_LOG_CLOSING 3607 sctp_log_closing(inp, NULL, 5); 3608 #endif 3609 3610 3611 if ((inp->sctp_asocidhash) != NULL) { 3612 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3613 inp->sctp_asocidhash = NULL; 3614 } 3615 /* sa_ignore FREED_MEMORY */ 3616 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3617 /* Its only abandoned if it had data left */ 3618 if (sq->length) 3619 SCTP_STAT_INCR(sctps_left_abandon); 3620 3621 TAILQ_REMOVE(&inp->read_queue, sq, next); 3622 sctp_free_remote_addr(sq->whoFrom); 3623 if (so) 3624 so->so_rcv.sb_cc -= sq->length; 3625 if (sq->data) { 3626 sctp_m_freem(sq->data); 3627 sq->data = NULL; 3628 } 3629 /* 3630 * no need to free the net count, since at this point all 3631 * assoc's are gone. 3632 */ 3633 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3634 SCTP_DECR_READQ_COUNT(); 3635 } 3636 /* Now the sctp_pcb things */ 3637 /* 3638 * free each asoc if it is not already closed/free. we can't use the 3639 * macro here since le_next will get freed as part of the 3640 * sctp_free_assoc() call. 3641 */ 3642 #ifdef IPSEC 3643 ipsec_delete_pcbpolicy(ip_pcb); 3644 #endif 3645 if (ip_pcb->inp_options) { 3646 (void)sctp_m_free(ip_pcb->inp_options); 3647 ip_pcb->inp_options = 0; 3648 } 3649 #ifdef INET6 3650 if (ip_pcb->inp_vflag & INP_IPV6) { 3651 struct in6pcb *in6p; 3652 3653 in6p = (struct in6pcb *)inp; 3654 ip6_freepcbopts(in6p->in6p_outputopts); 3655 } 3656 #endif /* INET6 */ 3657 ip_pcb->inp_vflag = 0; 3658 /* free up authentication fields */ 3659 if (inp->sctp_ep.local_auth_chunks != NULL) 3660 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3661 if (inp->sctp_ep.local_hmacs != NULL) 3662 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3663 3664 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3665 LIST_REMOVE(shared_key, next); 3666 sctp_free_sharedkey(shared_key); 3667 /* sa_ignore FREED_MEMORY */ 3668 } 3669 3670 /* 3671 * if we have an address list the following will free the list of 3672 * ifaddr's that are set into this ep. Again macro limitations here, 3673 * since the LIST_FOREACH could be a bad idea. 3674 */ 3675 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3676 sctp_remove_laddr(laddr); 3677 } 3678 3679 #ifdef SCTP_TRACK_FREED_ASOCS 3680 /* TEMP CODE */ 3681 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3682 LIST_REMOVE(asoc, sctp_tcblist); 3683 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3684 SCTP_DECR_ASOC_COUNT(); 3685 } 3686 /* *** END TEMP CODE *** */ 3687 #endif 3688 /* Now lets see about freeing the EP hash table. */ 3689 if (inp->sctp_tcbhash != NULL) { 3690 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3691 inp->sctp_tcbhash = NULL; 3692 } 3693 /* Now we must put the ep memory back into the zone pool */ 3694 crfree(inp->ip_inp.inp.inp_cred); 3695 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3696 SCTP_INP_LOCK_DESTROY(inp); 3697 SCTP_INP_READ_DESTROY(inp); 3698 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3699 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3700 SCTP_DECR_EP_COUNT(); 3701 } 3702 3703 3704 struct sctp_nets * 3705 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3706 { 3707 struct sctp_nets *net; 3708 3709 /* locate the address */ 3710 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3711 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3712 return (net); 3713 } 3714 return (NULL); 3715 } 3716 3717 3718 int 3719 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3720 { 3721 struct sctp_ifa *sctp_ifa; 3722 3723 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3724 if (sctp_ifa) { 3725 return (1); 3726 } else { 3727 return (0); 3728 } 3729 } 3730 3731 /* 3732 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3733 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3734 * stats of stuff. 3735 */ 3736 int 3737 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3738 struct sctp_nets **netp, int set_scope, int from) 3739 { 3740 /* 3741 * The following is redundant to the same lines in the 3742 * sctp_aloc_assoc() but is needed since others call the add address 3743 * function 3744 */ 3745 struct sctp_nets *net, *netfirst; 3746 int addr_inscope; 3747 3748 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3749 from); 3750 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3751 3752 netfirst = sctp_findnet(stcb, newaddr); 3753 if (netfirst) { 3754 /* 3755 * Lie and return ok, we don't want to make the association 3756 * go away for this behavior. It will happen in the TCP 3757 * model in a connected socket. It does not reach the hash 3758 * table until after the association is built so it can't be 3759 * found. Mark as reachable, since the initial creation will 3760 * have been cleared and the NOT_IN_ASSOC flag will have 3761 * been added... and we don't want to end up removing it 3762 * back out. 3763 */ 3764 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3765 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3766 SCTP_ADDR_UNCONFIRMED); 3767 } else { 3768 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3769 } 3770 3771 return (0); 3772 } 3773 addr_inscope = 1; 3774 switch (newaddr->sa_family) { 3775 #ifdef INET 3776 case AF_INET: 3777 { 3778 struct sockaddr_in *sin; 3779 3780 sin = (struct sockaddr_in *)newaddr; 3781 if (sin->sin_addr.s_addr == 0) { 3782 /* Invalid address */ 3783 return (-1); 3784 } 3785 /* zero out the bzero area */ 3786 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3787 3788 /* assure len is set */ 3789 sin->sin_len = sizeof(struct sockaddr_in); 3790 if (set_scope) { 3791 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3792 stcb->asoc.scope.ipv4_local_scope = 1; 3793 } 3794 } else { 3795 /* Validate the address is in scope */ 3796 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3797 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3798 addr_inscope = 0; 3799 } 3800 } 3801 break; 3802 } 3803 #endif 3804 #ifdef INET6 3805 case AF_INET6: 3806 { 3807 struct sockaddr_in6 *sin6; 3808 3809 sin6 = (struct sockaddr_in6 *)newaddr; 3810 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3811 /* Invalid address */ 3812 return (-1); 3813 } 3814 /* assure len is set */ 3815 sin6->sin6_len = sizeof(struct sockaddr_in6); 3816 if (set_scope) { 3817 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3818 stcb->asoc.scope.loopback_scope = 1; 3819 stcb->asoc.scope.local_scope = 0; 3820 stcb->asoc.scope.ipv4_local_scope = 1; 3821 stcb->asoc.scope.site_scope = 1; 3822 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3823 /* 3824 * If the new destination is a 3825 * LINK_LOCAL we must have common 3826 * site scope. Don't set the local 3827 * scope since we may not share all 3828 * links, only loopback can do this. 3829 * Links on the local network would 3830 * also be on our private network 3831 * for v4 too. 3832 */ 3833 stcb->asoc.scope.ipv4_local_scope = 1; 3834 stcb->asoc.scope.site_scope = 1; 3835 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3836 /* 3837 * If the new destination is 3838 * SITE_LOCAL then we must have site 3839 * scope in common. 3840 */ 3841 stcb->asoc.scope.site_scope = 1; 3842 } 3843 } else { 3844 /* Validate the address is in scope */ 3845 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3846 (stcb->asoc.scope.loopback_scope == 0)) { 3847 addr_inscope = 0; 3848 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3849 (stcb->asoc.scope.local_scope == 0)) { 3850 addr_inscope = 0; 3851 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3852 (stcb->asoc.scope.site_scope == 0)) { 3853 addr_inscope = 0; 3854 } 3855 } 3856 break; 3857 } 3858 #endif 3859 default: 3860 /* not supported family type */ 3861 return (-1); 3862 } 3863 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3864 if (net == NULL) { 3865 return (-1); 3866 } 3867 SCTP_INCR_RADDR_COUNT(); 3868 bzero(net, sizeof(struct sctp_nets)); 3869 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3870 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3871 switch (newaddr->sa_family) { 3872 #ifdef INET 3873 case AF_INET: 3874 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3875 break; 3876 #endif 3877 #ifdef INET6 3878 case AF_INET6: 3879 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3880 break; 3881 #endif 3882 default: 3883 break; 3884 } 3885 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3886 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3887 stcb->asoc.scope.loopback_scope = 1; 3888 stcb->asoc.scope.ipv4_local_scope = 1; 3889 stcb->asoc.scope.local_scope = 0; 3890 stcb->asoc.scope.site_scope = 1; 3891 addr_inscope = 1; 3892 } 3893 net->failure_threshold = stcb->asoc.def_net_failure; 3894 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3895 if (addr_inscope == 0) { 3896 net->dest_state = (SCTP_ADDR_REACHABLE | 3897 SCTP_ADDR_OUT_OF_SCOPE); 3898 } else { 3899 if (from == SCTP_ADDR_IS_CONFIRMED) 3900 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3901 net->dest_state = SCTP_ADDR_REACHABLE; 3902 else 3903 net->dest_state = SCTP_ADDR_REACHABLE | 3904 SCTP_ADDR_UNCONFIRMED; 3905 } 3906 /* 3907 * We set this to 0, the timer code knows that this means its an 3908 * initial value 3909 */ 3910 net->rto_needed = 1; 3911 net->RTO = 0; 3912 net->RTO_measured = 0; 3913 stcb->asoc.numnets++; 3914 net->ref_count = 1; 3915 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3916 net->port = stcb->asoc.port; 3917 net->dscp = stcb->asoc.default_dscp; 3918 #ifdef INET6 3919 net->flowlabel = stcb->asoc.default_flowlabel; 3920 #endif 3921 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3922 net->dest_state |= SCTP_ADDR_NOHB; 3923 } else { 3924 net->dest_state &= ~SCTP_ADDR_NOHB; 3925 } 3926 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3927 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3928 } else { 3929 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3930 } 3931 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3932 /* Init the timer structure */ 3933 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3934 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3935 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3936 3937 /* Now generate a route for this guy */ 3938 #ifdef INET6 3939 /* KAME hack: embed scopeid */ 3940 if (newaddr->sa_family == AF_INET6) { 3941 struct sockaddr_in6 *sin6; 3942 3943 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3944 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3945 sin6->sin6_scope_id = 0; 3946 } 3947 #endif 3948 SCTP_RTALLOC((sctp_route_t *) & net->ro, 3949 stcb->asoc.vrf_id, 3950 stcb->sctp_ep->fibnum); 3951 3952 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3953 /* Get source address */ 3954 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3955 stcb, 3956 (sctp_route_t *) & net->ro, 3957 net, 3958 0, 3959 stcb->asoc.vrf_id); 3960 if (net->ro._s_addr != NULL) { 3961 net->src_addr_selected = 1; 3962 /* Now get the interface MTU */ 3963 if (net->ro._s_addr->ifn_p != NULL) { 3964 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3965 } 3966 } else { 3967 net->src_addr_selected = 0; 3968 } 3969 if (net->mtu > 0) { 3970 uint32_t rmtu; 3971 3972 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3973 if (rmtu == 0) { 3974 /* 3975 * Start things off to match mtu of 3976 * interface please. 3977 */ 3978 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3979 net->ro.ro_rt, net->mtu); 3980 } else { 3981 /* 3982 * we take the route mtu over the interface, 3983 * since the route may be leading out the 3984 * loopback, or a different interface. 3985 */ 3986 net->mtu = rmtu; 3987 } 3988 } 3989 } else { 3990 net->src_addr_selected = 0; 3991 } 3992 if (net->mtu == 0) { 3993 switch (newaddr->sa_family) { 3994 #ifdef INET 3995 case AF_INET: 3996 net->mtu = SCTP_DEFAULT_MTU; 3997 break; 3998 #endif 3999 #ifdef INET6 4000 case AF_INET6: 4001 net->mtu = 1280; 4002 break; 4003 #endif 4004 default: 4005 break; 4006 } 4007 } 4008 #if defined(INET) || defined(INET6) 4009 if (net->port) { 4010 net->mtu -= (uint32_t) sizeof(struct udphdr); 4011 } 4012 #endif 4013 if (from == SCTP_ALLOC_ASOC) { 4014 stcb->asoc.smallest_mtu = net->mtu; 4015 } 4016 if (stcb->asoc.smallest_mtu > net->mtu) { 4017 stcb->asoc.smallest_mtu = net->mtu; 4018 } 4019 #ifdef INET6 4020 if (newaddr->sa_family == AF_INET6) { 4021 struct sockaddr_in6 *sin6; 4022 4023 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4024 (void)sa6_recoverscope(sin6); 4025 } 4026 #endif 4027 4028 /* JRS - Use the congestion control given in the CC module */ 4029 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4030 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4031 4032 /* 4033 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4034 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4035 */ 4036 net->find_pseudo_cumack = 1; 4037 net->find_rtx_pseudo_cumack = 1; 4038 /* Choose an initial flowid. */ 4039 net->flowid = stcb->asoc.my_vtag ^ 4040 ntohs(stcb->rport) ^ 4041 ntohs(stcb->sctp_ep->sctp_lport); 4042 net->flowtype = M_HASHTYPE_OPAQUE; 4043 if (netp) { 4044 *netp = net; 4045 } 4046 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4047 if (net->ro.ro_rt == NULL) { 4048 /* Since we have no route put it at the back */ 4049 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4050 } else if (netfirst == NULL) { 4051 /* We are the first one in the pool. */ 4052 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4053 } else if (netfirst->ro.ro_rt == NULL) { 4054 /* 4055 * First one has NO route. Place this one ahead of the first 4056 * one. 4057 */ 4058 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4059 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4060 /* 4061 * This one has a different interface than the one at the 4062 * top of the list. Place it ahead. 4063 */ 4064 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4065 } else { 4066 /* 4067 * Ok we have the same interface as the first one. Move 4068 * forward until we find either a) one with a NULL route... 4069 * insert ahead of that b) one with a different ifp.. insert 4070 * after that. c) end of the list.. insert at the tail. 4071 */ 4072 struct sctp_nets *netlook; 4073 4074 do { 4075 netlook = TAILQ_NEXT(netfirst, sctp_next); 4076 if (netlook == NULL) { 4077 /* End of the list */ 4078 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4079 break; 4080 } else if (netlook->ro.ro_rt == NULL) { 4081 /* next one has NO route */ 4082 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4083 break; 4084 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4085 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4086 net, sctp_next); 4087 break; 4088 } 4089 /* Shift forward */ 4090 netfirst = netlook; 4091 } while (netlook != NULL); 4092 } 4093 4094 /* got to have a primary set */ 4095 if (stcb->asoc.primary_destination == 0) { 4096 stcb->asoc.primary_destination = net; 4097 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4098 (net->ro.ro_rt) && 4099 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4100 /* No route to current primary adopt new primary */ 4101 stcb->asoc.primary_destination = net; 4102 } 4103 /* Validate primary is first */ 4104 net = TAILQ_FIRST(&stcb->asoc.nets); 4105 if ((net != stcb->asoc.primary_destination) && 4106 (stcb->asoc.primary_destination)) { 4107 /* 4108 * first one on the list is NOT the primary sctp_cmpaddr() 4109 * is much more efficient if the primary is the first on the 4110 * list, make it so. 4111 */ 4112 TAILQ_REMOVE(&stcb->asoc.nets, 4113 stcb->asoc.primary_destination, sctp_next); 4114 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4115 stcb->asoc.primary_destination, sctp_next); 4116 } 4117 return (0); 4118 } 4119 4120 4121 static uint32_t 4122 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4123 { 4124 uint32_t id; 4125 struct sctpasochead *head; 4126 struct sctp_tcb *lstcb; 4127 4128 SCTP_INP_WLOCK(inp); 4129 try_again: 4130 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4131 /* TSNH */ 4132 SCTP_INP_WUNLOCK(inp); 4133 return (0); 4134 } 4135 /* 4136 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4137 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4138 */ 4139 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4140 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4141 } 4142 id = inp->sctp_associd_counter; 4143 inp->sctp_associd_counter++; 4144 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4145 if (lstcb) { 4146 goto try_again; 4147 } 4148 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4149 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4150 stcb->asoc.in_asocid_hash = 1; 4151 SCTP_INP_WUNLOCK(inp); 4152 return id; 4153 } 4154 4155 /* 4156 * allocate an association and add it to the endpoint. The caller must be 4157 * careful to add all additional addresses once they are know right away or 4158 * else the assoc will be may experience a blackout scenario. 4159 */ 4160 struct sctp_tcb * 4161 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4162 int *error, uint32_t override_tag, uint32_t vrf_id, 4163 uint16_t o_streams, 4164 struct thread *p 4165 ) 4166 { 4167 /* note the p argument is only valid in unbound sockets */ 4168 4169 struct sctp_tcb *stcb; 4170 struct sctp_association *asoc; 4171 struct sctpasochead *head; 4172 uint16_t rport; 4173 int err; 4174 4175 /* 4176 * Assumption made here: Caller has done a 4177 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4178 * address does not exist already. 4179 */ 4180 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4181 /* Hit max assoc, sorry no more */ 4182 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4183 *error = ENOBUFS; 4184 return (NULL); 4185 } 4186 if (firstaddr == NULL) { 4187 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4188 *error = EINVAL; 4189 return (NULL); 4190 } 4191 SCTP_INP_RLOCK(inp); 4192 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4193 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4194 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4195 /* 4196 * If its in the TCP pool, its NOT allowed to create an 4197 * association. The parent listener needs to call 4198 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4199 * off, or connected one does this.. its an error. 4200 */ 4201 SCTP_INP_RUNLOCK(inp); 4202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4203 *error = EINVAL; 4204 return (NULL); 4205 } 4206 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4207 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4208 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4209 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4210 SCTP_INP_RUNLOCK(inp); 4211 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4212 *error = EINVAL; 4213 return (NULL); 4214 } 4215 } 4216 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4217 #ifdef SCTP_DEBUG 4218 if (firstaddr) { 4219 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4220 switch (firstaddr->sa_family) { 4221 #ifdef INET 4222 case AF_INET: 4223 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4224 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4225 break; 4226 #endif 4227 #ifdef INET6 4228 case AF_INET6: 4229 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4230 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4231 break; 4232 #endif 4233 default: 4234 break; 4235 } 4236 } else { 4237 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4238 } 4239 #endif /* SCTP_DEBUG */ 4240 switch (firstaddr->sa_family) { 4241 #ifdef INET 4242 case AF_INET: 4243 { 4244 struct sockaddr_in *sin; 4245 4246 sin = (struct sockaddr_in *)firstaddr; 4247 if ((ntohs(sin->sin_port) == 0) || 4248 (sin->sin_addr.s_addr == INADDR_ANY) || 4249 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4250 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4251 /* Invalid address */ 4252 SCTP_INP_RUNLOCK(inp); 4253 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4254 *error = EINVAL; 4255 return (NULL); 4256 } 4257 rport = sin->sin_port; 4258 break; 4259 } 4260 #endif 4261 #ifdef INET6 4262 case AF_INET6: 4263 { 4264 struct sockaddr_in6 *sin6; 4265 4266 sin6 = (struct sockaddr_in6 *)firstaddr; 4267 if ((ntohs(sin6->sin6_port) == 0) || 4268 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4269 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4270 /* Invalid address */ 4271 SCTP_INP_RUNLOCK(inp); 4272 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4273 *error = EINVAL; 4274 return (NULL); 4275 } 4276 rport = sin6->sin6_port; 4277 break; 4278 } 4279 #endif 4280 default: 4281 /* not supported family type */ 4282 SCTP_INP_RUNLOCK(inp); 4283 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4284 *error = EINVAL; 4285 return (NULL); 4286 } 4287 SCTP_INP_RUNLOCK(inp); 4288 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4289 /* 4290 * If you have not performed a bind, then we need to do the 4291 * ephemeral bind for you. 4292 */ 4293 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4294 (struct sockaddr *)NULL, 4295 (struct sctp_ifa *)NULL, 4296 p 4297 ))) { 4298 /* bind error, probably perm */ 4299 *error = err; 4300 return (NULL); 4301 } 4302 } 4303 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4304 if (stcb == NULL) { 4305 /* out of memory? */ 4306 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4307 *error = ENOMEM; 4308 return (NULL); 4309 } 4310 SCTP_INCR_ASOC_COUNT(); 4311 4312 bzero(stcb, sizeof(*stcb)); 4313 asoc = &stcb->asoc; 4314 4315 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4316 SCTP_TCB_LOCK_INIT(stcb); 4317 SCTP_TCB_SEND_LOCK_INIT(stcb); 4318 stcb->rport = rport; 4319 /* setup back pointer's */ 4320 stcb->sctp_ep = inp; 4321 stcb->sctp_socket = inp->sctp_socket; 4322 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4323 /* failed */ 4324 SCTP_TCB_LOCK_DESTROY(stcb); 4325 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4326 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4327 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4328 SCTP_DECR_ASOC_COUNT(); 4329 *error = err; 4330 return (NULL); 4331 } 4332 /* and the port */ 4333 SCTP_INP_INFO_WLOCK(); 4334 SCTP_INP_WLOCK(inp); 4335 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4336 /* inpcb freed while alloc going on */ 4337 SCTP_TCB_LOCK_DESTROY(stcb); 4338 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4339 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4340 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4341 SCTP_INP_WUNLOCK(inp); 4342 SCTP_INP_INFO_WUNLOCK(); 4343 SCTP_DECR_ASOC_COUNT(); 4344 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4345 *error = EINVAL; 4346 return (NULL); 4347 } 4348 SCTP_TCB_LOCK(stcb); 4349 4350 /* now that my_vtag is set, add it to the hash */ 4351 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4352 /* put it in the bucket in the vtag hash of assoc's for the system */ 4353 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4354 SCTP_INP_INFO_WUNLOCK(); 4355 4356 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4357 /* failure.. memory error? */ 4358 if (asoc->strmout) { 4359 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4360 asoc->strmout = NULL; 4361 } 4362 if (asoc->mapping_array) { 4363 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4364 asoc->mapping_array = NULL; 4365 } 4366 if (asoc->nr_mapping_array) { 4367 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4368 asoc->nr_mapping_array = NULL; 4369 } 4370 SCTP_DECR_ASOC_COUNT(); 4371 SCTP_TCB_UNLOCK(stcb); 4372 SCTP_TCB_LOCK_DESTROY(stcb); 4373 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4374 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4375 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4376 SCTP_INP_WUNLOCK(inp); 4377 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4378 *error = ENOBUFS; 4379 return (NULL); 4380 } 4381 /* Init all the timers */ 4382 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4383 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4384 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4385 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4386 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4387 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4388 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4389 4390 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4391 /* now file the port under the hash as well */ 4392 if (inp->sctp_tcbhash != NULL) { 4393 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4394 inp->sctp_hashmark)]; 4395 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4396 } 4397 SCTP_INP_WUNLOCK(inp); 4398 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4399 return (stcb); 4400 } 4401 4402 4403 void 4404 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4405 { 4406 struct sctp_association *asoc; 4407 4408 asoc = &stcb->asoc; 4409 asoc->numnets--; 4410 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4411 if (net == asoc->primary_destination) { 4412 /* Reset primary */ 4413 struct sctp_nets *lnet; 4414 4415 lnet = TAILQ_FIRST(&asoc->nets); 4416 /* 4417 * Mobility adaptation Ideally, if deleted destination is 4418 * the primary, it becomes a fast retransmission trigger by 4419 * the subsequent SET PRIMARY. (by micchie) 4420 */ 4421 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4422 SCTP_MOBILITY_BASE) || 4423 sctp_is_mobility_feature_on(stcb->sctp_ep, 4424 SCTP_MOBILITY_FASTHANDOFF)) { 4425 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4426 if (asoc->deleted_primary != NULL) { 4427 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4428 goto out; 4429 } 4430 asoc->deleted_primary = net; 4431 atomic_add_int(&net->ref_count, 1); 4432 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4433 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4434 sctp_mobility_feature_on(stcb->sctp_ep, 4435 SCTP_MOBILITY_PRIM_DELETED); 4436 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4437 stcb->sctp_ep, stcb, NULL); 4438 } 4439 out: 4440 /* Try to find a confirmed primary */ 4441 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4442 } 4443 if (net == asoc->last_data_chunk_from) { 4444 /* Reset primary */ 4445 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4446 } 4447 if (net == asoc->last_control_chunk_from) { 4448 /* Clear net */ 4449 asoc->last_control_chunk_from = NULL; 4450 } 4451 if (net == stcb->asoc.alternate) { 4452 sctp_free_remote_addr(stcb->asoc.alternate); 4453 stcb->asoc.alternate = NULL; 4454 } 4455 sctp_free_remote_addr(net); 4456 } 4457 4458 /* 4459 * remove a remote endpoint address from an association, it will fail if the 4460 * address does not exist. 4461 */ 4462 int 4463 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4464 { 4465 /* 4466 * Here we need to remove a remote address. This is quite simple, we 4467 * first find it in the list of address for the association 4468 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4469 * on that item. Note we do not allow it to be removed if there are 4470 * no other addresses. 4471 */ 4472 struct sctp_association *asoc; 4473 struct sctp_nets *net, *nnet; 4474 4475 asoc = &stcb->asoc; 4476 4477 /* locate the address */ 4478 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4479 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4480 continue; 4481 } 4482 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4483 remaddr)) { 4484 /* we found the guy */ 4485 if (asoc->numnets < 2) { 4486 /* Must have at LEAST two remote addresses */ 4487 return (-1); 4488 } else { 4489 sctp_remove_net(stcb, net); 4490 return (0); 4491 } 4492 } 4493 } 4494 /* not found. */ 4495 return (-2); 4496 } 4497 4498 void 4499 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4500 { 4501 struct sctpvtaghead *chain; 4502 struct sctp_tagblock *twait_block; 4503 int found = 0; 4504 int i; 4505 4506 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4507 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4508 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4509 if ((twait_block->vtag_block[i].v_tag == tag) && 4510 (twait_block->vtag_block[i].lport == lport) && 4511 (twait_block->vtag_block[i].rport == rport)) { 4512 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4513 twait_block->vtag_block[i].v_tag = 0; 4514 twait_block->vtag_block[i].lport = 0; 4515 twait_block->vtag_block[i].rport = 0; 4516 found = 1; 4517 break; 4518 } 4519 } 4520 if (found) 4521 break; 4522 } 4523 } 4524 4525 int 4526 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4527 { 4528 struct sctpvtaghead *chain; 4529 struct sctp_tagblock *twait_block; 4530 int found = 0; 4531 int i; 4532 4533 SCTP_INP_INFO_WLOCK(); 4534 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4535 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4536 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4537 if ((twait_block->vtag_block[i].v_tag == tag) && 4538 (twait_block->vtag_block[i].lport == lport) && 4539 (twait_block->vtag_block[i].rport == rport)) { 4540 found = 1; 4541 break; 4542 } 4543 } 4544 if (found) 4545 break; 4546 } 4547 SCTP_INP_INFO_WUNLOCK(); 4548 return (found); 4549 } 4550 4551 4552 void 4553 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4554 { 4555 struct sctpvtaghead *chain; 4556 struct sctp_tagblock *twait_block; 4557 struct timeval now; 4558 int set, i; 4559 4560 if (time == 0) { 4561 /* Its disabled */ 4562 return; 4563 } 4564 (void)SCTP_GETTIME_TIMEVAL(&now); 4565 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4566 set = 0; 4567 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4568 /* Block(s) present, lets find space, and expire on the fly */ 4569 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4570 if ((twait_block->vtag_block[i].v_tag == 0) && 4571 !set) { 4572 twait_block->vtag_block[i].tv_sec_at_expire = 4573 now.tv_sec + time; 4574 twait_block->vtag_block[i].v_tag = tag; 4575 twait_block->vtag_block[i].lport = lport; 4576 twait_block->vtag_block[i].rport = rport; 4577 set = 1; 4578 } else if ((twait_block->vtag_block[i].v_tag) && 4579 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4580 /* Audit expires this guy */ 4581 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4582 twait_block->vtag_block[i].v_tag = 0; 4583 twait_block->vtag_block[i].lport = 0; 4584 twait_block->vtag_block[i].rport = 0; 4585 if (set == 0) { 4586 /* Reuse it for my new tag */ 4587 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4588 twait_block->vtag_block[i].v_tag = tag; 4589 twait_block->vtag_block[i].lport = lport; 4590 twait_block->vtag_block[i].rport = rport; 4591 set = 1; 4592 } 4593 } 4594 } 4595 if (set) { 4596 /* 4597 * We only do up to the block where we can place our 4598 * tag for audits 4599 */ 4600 break; 4601 } 4602 } 4603 /* Need to add a new block to chain */ 4604 if (!set) { 4605 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4606 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4607 if (twait_block == NULL) { 4608 #ifdef INVARIANTS 4609 panic("Can not alloc tagblock"); 4610 #endif 4611 return; 4612 } 4613 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4614 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4615 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4616 twait_block->vtag_block[0].v_tag = tag; 4617 twait_block->vtag_block[0].lport = lport; 4618 twait_block->vtag_block[0].rport = rport; 4619 } 4620 } 4621 4622 4623 4624 /*- 4625 * Free the association after un-hashing the remote port. This 4626 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4627 * expect that the input to this function IS a locked TCB. 4628 * It will return 0, if it did NOT destroy the association (instead 4629 * it unlocks it. It will return NON-zero if it either destroyed the 4630 * association OR the association is already destroyed. 4631 */ 4632 int 4633 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4634 { 4635 int i; 4636 struct sctp_association *asoc; 4637 struct sctp_nets *net, *nnet; 4638 struct sctp_laddr *laddr, *naddr; 4639 struct sctp_tmit_chunk *chk, *nchk; 4640 struct sctp_asconf_addr *aparam, *naparam; 4641 struct sctp_asconf_ack *aack, *naack; 4642 struct sctp_stream_reset_list *strrst, *nstrrst; 4643 struct sctp_queued_to_read *sq, *nsq; 4644 struct sctp_stream_queue_pending *sp, *nsp; 4645 sctp_sharedkey_t *shared_key, *nshared_key; 4646 struct socket *so; 4647 4648 /* first, lets purge the entry from the hash table. */ 4649 4650 #ifdef SCTP_LOG_CLOSING 4651 sctp_log_closing(inp, stcb, 6); 4652 #endif 4653 if (stcb->asoc.state == 0) { 4654 #ifdef SCTP_LOG_CLOSING 4655 sctp_log_closing(inp, NULL, 7); 4656 #endif 4657 /* there is no asoc, really TSNH :-0 */ 4658 return (1); 4659 } 4660 if (stcb->asoc.alternate) { 4661 sctp_free_remote_addr(stcb->asoc.alternate); 4662 stcb->asoc.alternate = NULL; 4663 } 4664 /* TEMP CODE */ 4665 if (stcb->freed_from_where == 0) { 4666 /* Only record the first place free happened from */ 4667 stcb->freed_from_where = from_location; 4668 } 4669 /* TEMP CODE */ 4670 4671 asoc = &stcb->asoc; 4672 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4673 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4674 /* nothing around */ 4675 so = NULL; 4676 else 4677 so = inp->sctp_socket; 4678 4679 /* 4680 * We used timer based freeing if a reader or writer is in the way. 4681 * So we first check if we are actually being called from a timer, 4682 * if so we abort early if a reader or writer is still in the way. 4683 */ 4684 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4685 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4686 /* 4687 * is it the timer driving us? if so are the reader/writers 4688 * gone? 4689 */ 4690 if (stcb->asoc.refcnt) { 4691 /* nope, reader or writer in the way */ 4692 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4693 /* no asoc destroyed */ 4694 SCTP_TCB_UNLOCK(stcb); 4695 #ifdef SCTP_LOG_CLOSING 4696 sctp_log_closing(inp, stcb, 8); 4697 #endif 4698 return (0); 4699 } 4700 } 4701 /* now clean up any other timers */ 4702 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4703 asoc->dack_timer.self = NULL; 4704 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4705 /*- 4706 * For stream reset we don't blast this unless 4707 * it is a str-reset timer, it might be the 4708 * free-asoc timer which we DON'T want to 4709 * disturb. 4710 */ 4711 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4712 asoc->strreset_timer.self = NULL; 4713 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4714 asoc->asconf_timer.self = NULL; 4715 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4716 asoc->autoclose_timer.self = NULL; 4717 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4718 asoc->shut_guard_timer.self = NULL; 4719 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4720 asoc->delayed_event_timer.self = NULL; 4721 /* Mobility adaptation */ 4722 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4723 asoc->delete_prim_timer.self = NULL; 4724 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4725 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4726 net->rxt_timer.self = NULL; 4727 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4728 net->pmtu_timer.self = NULL; 4729 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4730 net->hb_timer.self = NULL; 4731 } 4732 /* Now the read queue needs to be cleaned up (only once) */ 4733 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4734 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4735 SCTP_INP_READ_LOCK(inp); 4736 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4737 if (sq->stcb == stcb) { 4738 sq->do_not_ref_stcb = 1; 4739 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4740 /* 4741 * If there is no end, there never will be 4742 * now. 4743 */ 4744 if (sq->end_added == 0) { 4745 /* Held for PD-API clear that. */ 4746 sq->pdapi_aborted = 1; 4747 sq->held_length = 0; 4748 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4749 /* 4750 * Need to add a PD-API 4751 * aborted indication. 4752 * Setting the control_pdapi 4753 * assures that it will be 4754 * added right after this 4755 * msg. 4756 */ 4757 uint32_t strseq; 4758 4759 stcb->asoc.control_pdapi = sq; 4760 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4761 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4762 stcb, 4763 SCTP_PARTIAL_DELIVERY_ABORTED, 4764 (void *)&strseq, 4765 SCTP_SO_LOCKED); 4766 stcb->asoc.control_pdapi = NULL; 4767 } 4768 } 4769 /* Add an end to wake them */ 4770 sq->end_added = 1; 4771 } 4772 } 4773 SCTP_INP_READ_UNLOCK(inp); 4774 if (stcb->block_entry) { 4775 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4776 stcb->block_entry->error = ECONNRESET; 4777 stcb->block_entry = NULL; 4778 } 4779 } 4780 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4781 /* 4782 * Someone holds a reference OR the socket is unaccepted 4783 * yet. 4784 */ 4785 if ((stcb->asoc.refcnt) || 4786 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4787 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4788 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4789 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4790 } 4791 SCTP_TCB_UNLOCK(stcb); 4792 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4793 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4794 /* nothing around */ 4795 so = NULL; 4796 if (so) { 4797 /* Wake any reader/writers */ 4798 sctp_sorwakeup(inp, so); 4799 sctp_sowwakeup(inp, so); 4800 } 4801 #ifdef SCTP_LOG_CLOSING 4802 sctp_log_closing(inp, stcb, 9); 4803 #endif 4804 /* no asoc destroyed */ 4805 return (0); 4806 } 4807 #ifdef SCTP_LOG_CLOSING 4808 sctp_log_closing(inp, stcb, 10); 4809 #endif 4810 /* 4811 * When I reach here, no others want to kill the assoc yet.. and I 4812 * own the lock. Now its possible an abort comes in when I do the 4813 * lock exchange below to grab all the locks to do the final take 4814 * out. to prevent this we increment the count, which will start a 4815 * timer and blow out above thus assuring us that we hold exclusive 4816 * killing of the asoc. Note that after getting back the TCB lock we 4817 * will go ahead and increment the counter back up and stop any 4818 * timer a passing stranger may have started :-S 4819 */ 4820 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4821 atomic_add_int(&stcb->asoc.refcnt, 1); 4822 4823 SCTP_TCB_UNLOCK(stcb); 4824 SCTP_INP_INFO_WLOCK(); 4825 SCTP_INP_WLOCK(inp); 4826 SCTP_TCB_LOCK(stcb); 4827 } 4828 /* Double check the GONE flag */ 4829 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4830 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4831 /* nothing around */ 4832 so = NULL; 4833 4834 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4835 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4836 /* 4837 * For TCP type we need special handling when we are 4838 * connected. We also include the peel'ed off ones to. 4839 */ 4840 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4841 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4842 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4843 if (so) { 4844 SOCK_LOCK(so); 4845 if (so->so_rcv.sb_cc == 0) { 4846 so->so_state &= ~(SS_ISCONNECTING | 4847 SS_ISDISCONNECTING | 4848 SS_ISCONFIRMING | 4849 SS_ISCONNECTED); 4850 } 4851 socantrcvmore_locked(so); 4852 sctp_sowwakeup(inp, so); 4853 sctp_sorwakeup(inp, so); 4854 SCTP_SOWAKEUP(so); 4855 } 4856 } 4857 } 4858 /* 4859 * Make it invalid too, that way if its about to run it will abort 4860 * and return. 4861 */ 4862 /* re-increment the lock */ 4863 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4864 atomic_add_int(&stcb->asoc.refcnt, -1); 4865 } 4866 if (stcb->asoc.refcnt) { 4867 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4868 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4869 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4870 SCTP_INP_INFO_WUNLOCK(); 4871 SCTP_INP_WUNLOCK(inp); 4872 } 4873 SCTP_TCB_UNLOCK(stcb); 4874 return (0); 4875 } 4876 asoc->state = 0; 4877 if (inp->sctp_tcbhash) { 4878 LIST_REMOVE(stcb, sctp_tcbhash); 4879 } 4880 if (stcb->asoc.in_asocid_hash) { 4881 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4882 } 4883 /* Now lets remove it from the list of ALL associations in the EP */ 4884 LIST_REMOVE(stcb, sctp_tcblist); 4885 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4886 SCTP_INP_INCR_REF(inp); 4887 SCTP_INP_WUNLOCK(inp); 4888 } 4889 /* pull from vtag hash */ 4890 LIST_REMOVE(stcb, sctp_asocs); 4891 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4892 inp->sctp_lport, stcb->rport); 4893 4894 /* 4895 * Now restop the timers to be sure this is paranoia at is finest! 4896 */ 4897 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4898 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4899 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4900 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4901 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4902 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4903 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4904 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4905 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4906 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4907 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4908 } 4909 4910 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4911 /* 4912 * The chunk lists and such SHOULD be empty but we check them just 4913 * in case. 4914 */ 4915 /* anything on the wheel needs to be removed */ 4916 for (i = 0; i < asoc->streamoutcnt; i++) { 4917 struct sctp_stream_out *outs; 4918 4919 outs = &asoc->strmout[i]; 4920 /* now clean up any chunks here */ 4921 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4922 TAILQ_REMOVE(&outs->outqueue, sp, next); 4923 sctp_free_spbufspace(stcb, asoc, sp); 4924 if (sp->data) { 4925 if (so) { 4926 /* Still an open socket - report */ 4927 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4928 0, (void *)sp, SCTP_SO_LOCKED); 4929 } 4930 if (sp->data) { 4931 sctp_m_freem(sp->data); 4932 sp->data = NULL; 4933 sp->tail_mbuf = NULL; 4934 sp->length = 0; 4935 } 4936 } 4937 if (sp->net) { 4938 sctp_free_remote_addr(sp->net); 4939 sp->net = NULL; 4940 } 4941 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4942 } 4943 } 4944 /* sa_ignore FREED_MEMORY */ 4945 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4946 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4947 SCTP_FREE(strrst, SCTP_M_STRESET); 4948 } 4949 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4950 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4951 if (sq->data) { 4952 sctp_m_freem(sq->data); 4953 sq->data = NULL; 4954 } 4955 sctp_free_remote_addr(sq->whoFrom); 4956 sq->whoFrom = NULL; 4957 sq->stcb = NULL; 4958 /* Free the ctl entry */ 4959 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4960 SCTP_DECR_READQ_COUNT(); 4961 /* sa_ignore FREED_MEMORY */ 4962 } 4963 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4964 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4965 if (chk->data) { 4966 sctp_m_freem(chk->data); 4967 chk->data = NULL; 4968 } 4969 if (chk->holds_key_ref) 4970 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4971 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4972 SCTP_DECR_CHK_COUNT(); 4973 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4974 asoc->free_chunk_cnt--; 4975 /* sa_ignore FREED_MEMORY */ 4976 } 4977 /* pending send queue SHOULD be empty */ 4978 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4979 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4980 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4981 #ifdef INVARIANTS 4982 } else { 4983 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4984 #endif 4985 } 4986 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4987 if (chk->data) { 4988 if (so) { 4989 /* Still a socket? */ 4990 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4991 0, chk, SCTP_SO_LOCKED); 4992 } 4993 if (chk->data) { 4994 sctp_m_freem(chk->data); 4995 chk->data = NULL; 4996 } 4997 } 4998 if (chk->holds_key_ref) 4999 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5000 if (chk->whoTo) { 5001 sctp_free_remote_addr(chk->whoTo); 5002 chk->whoTo = NULL; 5003 } 5004 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5005 SCTP_DECR_CHK_COUNT(); 5006 /* sa_ignore FREED_MEMORY */ 5007 } 5008 /* sent queue SHOULD be empty */ 5009 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5010 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5011 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5012 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5013 #ifdef INVARIANTS 5014 } else { 5015 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5016 #endif 5017 } 5018 } 5019 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5020 if (chk->data) { 5021 if (so) { 5022 /* Still a socket? */ 5023 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5024 0, chk, SCTP_SO_LOCKED); 5025 } 5026 if (chk->data) { 5027 sctp_m_freem(chk->data); 5028 chk->data = NULL; 5029 } 5030 } 5031 if (chk->holds_key_ref) 5032 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5033 sctp_free_remote_addr(chk->whoTo); 5034 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5035 SCTP_DECR_CHK_COUNT(); 5036 /* sa_ignore FREED_MEMORY */ 5037 } 5038 #ifdef INVARIANTS 5039 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5040 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5041 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5042 } 5043 } 5044 #endif 5045 /* control queue MAY not be empty */ 5046 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5047 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5048 if (chk->data) { 5049 sctp_m_freem(chk->data); 5050 chk->data = NULL; 5051 } 5052 if (chk->holds_key_ref) 5053 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5054 sctp_free_remote_addr(chk->whoTo); 5055 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5056 SCTP_DECR_CHK_COUNT(); 5057 /* sa_ignore FREED_MEMORY */ 5058 } 5059 /* ASCONF queue MAY not be empty */ 5060 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5061 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5062 if (chk->data) { 5063 sctp_m_freem(chk->data); 5064 chk->data = NULL; 5065 } 5066 if (chk->holds_key_ref) 5067 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5068 sctp_free_remote_addr(chk->whoTo); 5069 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5070 SCTP_DECR_CHK_COUNT(); 5071 /* sa_ignore FREED_MEMORY */ 5072 } 5073 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5074 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5075 if (chk->data) { 5076 sctp_m_freem(chk->data); 5077 chk->data = NULL; 5078 } 5079 if (chk->holds_key_ref) 5080 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5081 sctp_free_remote_addr(chk->whoTo); 5082 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5083 SCTP_DECR_CHK_COUNT(); 5084 /* sa_ignore FREED_MEMORY */ 5085 } 5086 5087 if (asoc->mapping_array) { 5088 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5089 asoc->mapping_array = NULL; 5090 } 5091 if (asoc->nr_mapping_array) { 5092 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5093 asoc->nr_mapping_array = NULL; 5094 } 5095 /* the stream outs */ 5096 if (asoc->strmout) { 5097 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5098 asoc->strmout = NULL; 5099 } 5100 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5101 if (asoc->strmin) { 5102 struct sctp_queued_to_read *ctl, *nctl; 5103 5104 for (i = 0; i < asoc->streamincnt; i++) { 5105 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5106 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5107 sctp_free_remote_addr(ctl->whoFrom); 5108 if (ctl->data) { 5109 sctp_m_freem(ctl->data); 5110 ctl->data = NULL; 5111 } 5112 /* 5113 * We don't free the address here since all 5114 * the net's were freed above. 5115 */ 5116 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5117 SCTP_DECR_READQ_COUNT(); 5118 } 5119 } 5120 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5121 asoc->strmin = NULL; 5122 } 5123 asoc->streamincnt = 0; 5124 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5125 #ifdef INVARIANTS 5126 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5127 panic("no net's left alloc'ed, or list points to itself"); 5128 } 5129 #endif 5130 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5131 sctp_free_remote_addr(net); 5132 } 5133 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5134 /* sa_ignore FREED_MEMORY */ 5135 sctp_remove_laddr(laddr); 5136 } 5137 5138 /* pending asconf (address) parameters */ 5139 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5140 /* sa_ignore FREED_MEMORY */ 5141 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5142 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5143 } 5144 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5145 /* sa_ignore FREED_MEMORY */ 5146 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5147 if (aack->data != NULL) { 5148 sctp_m_freem(aack->data); 5149 } 5150 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5151 } 5152 /* clean up auth stuff */ 5153 if (asoc->local_hmacs) 5154 sctp_free_hmaclist(asoc->local_hmacs); 5155 if (asoc->peer_hmacs) 5156 sctp_free_hmaclist(asoc->peer_hmacs); 5157 5158 if (asoc->local_auth_chunks) 5159 sctp_free_chunklist(asoc->local_auth_chunks); 5160 if (asoc->peer_auth_chunks) 5161 sctp_free_chunklist(asoc->peer_auth_chunks); 5162 5163 sctp_free_authinfo(&asoc->authinfo); 5164 5165 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5166 LIST_REMOVE(shared_key, next); 5167 sctp_free_sharedkey(shared_key); 5168 /* sa_ignore FREED_MEMORY */ 5169 } 5170 5171 /* Insert new items here :> */ 5172 5173 /* Get rid of LOCK */ 5174 SCTP_TCB_UNLOCK(stcb); 5175 SCTP_TCB_LOCK_DESTROY(stcb); 5176 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5177 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5178 SCTP_INP_INFO_WUNLOCK(); 5179 SCTP_INP_RLOCK(inp); 5180 } 5181 #ifdef SCTP_TRACK_FREED_ASOCS 5182 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5183 /* now clean up the tasoc itself */ 5184 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5185 SCTP_DECR_ASOC_COUNT(); 5186 } else { 5187 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5188 } 5189 #else 5190 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5191 SCTP_DECR_ASOC_COUNT(); 5192 #endif 5193 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5194 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5195 /* 5196 * If its NOT the inp_free calling us AND sctp_close 5197 * as been called, we call back... 5198 */ 5199 SCTP_INP_RUNLOCK(inp); 5200 /* 5201 * This will start the kill timer (if we are the 5202 * last one) since we hold an increment yet. But 5203 * this is the only safe way to do this since 5204 * otherwise if the socket closes at the same time 5205 * we are here we might collide in the cleanup. 5206 */ 5207 sctp_inpcb_free(inp, 5208 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5209 SCTP_CALLED_DIRECTLY_NOCMPSET); 5210 SCTP_INP_DECR_REF(inp); 5211 goto out_of; 5212 } else { 5213 /* The socket is still open. */ 5214 SCTP_INP_DECR_REF(inp); 5215 } 5216 } 5217 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5218 SCTP_INP_RUNLOCK(inp); 5219 } 5220 out_of: 5221 /* destroyed the asoc */ 5222 #ifdef SCTP_LOG_CLOSING 5223 sctp_log_closing(inp, NULL, 11); 5224 #endif 5225 return (1); 5226 } 5227 5228 5229 5230 /* 5231 * determine if a destination is "reachable" based upon the addresses bound 5232 * to the current endpoint (e.g. only v4 or v6 currently bound) 5233 */ 5234 /* 5235 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5236 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5237 * types bound as its endpoint 5238 */ 5239 int 5240 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5241 { 5242 struct sctp_inpcb *inp; 5243 int answer; 5244 5245 /* 5246 * No locks here, the TCB, in all cases is already locked and an 5247 * assoc is up. There is either a INP lock by the caller applied (in 5248 * asconf case when deleting an address) or NOT in the HB case, 5249 * however if HB then the INP increment is up and the INP will not 5250 * be removed (on top of the fact that we have a TCB lock). So we 5251 * only want to read the sctp_flags, which is either bound-all or 5252 * not.. no protection needed since once an assoc is up you can't be 5253 * changing your binding. 5254 */ 5255 inp = stcb->sctp_ep; 5256 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5257 /* if bound all, destination is not restricted */ 5258 /* 5259 * RRS: Question during lock work: Is this correct? If you 5260 * are bound-all you still might need to obey the V4--V6 5261 * flags??? IMO this bound-all stuff needs to be removed! 5262 */ 5263 return (1); 5264 } 5265 /* NOTE: all "scope" checks are done when local addresses are added */ 5266 switch (destaddr->sa_family) { 5267 #ifdef INET6 5268 case AF_INET6: 5269 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5270 break; 5271 #endif 5272 #ifdef INET 5273 case AF_INET: 5274 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5275 break; 5276 #endif 5277 default: 5278 /* invalid family, so it's unreachable */ 5279 answer = 0; 5280 break; 5281 } 5282 return (answer); 5283 } 5284 5285 /* 5286 * update the inp_vflags on an endpoint 5287 */ 5288 static void 5289 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5290 { 5291 struct sctp_laddr *laddr; 5292 5293 /* first clear the flag */ 5294 inp->ip_inp.inp.inp_vflag = 0; 5295 /* set the flag based on addresses on the ep list */ 5296 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5297 if (laddr->ifa == NULL) { 5298 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5299 __func__); 5300 continue; 5301 } 5302 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5303 continue; 5304 } 5305 switch (laddr->ifa->address.sa.sa_family) { 5306 #ifdef INET6 5307 case AF_INET6: 5308 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5309 break; 5310 #endif 5311 #ifdef INET 5312 case AF_INET: 5313 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5314 break; 5315 #endif 5316 default: 5317 break; 5318 } 5319 } 5320 } 5321 5322 /* 5323 * Add the address to the endpoint local address list There is nothing to be 5324 * done if we are bound to all addresses 5325 */ 5326 void 5327 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5328 { 5329 struct sctp_laddr *laddr; 5330 int fnd, error = 0; 5331 5332 fnd = 0; 5333 5334 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5335 /* You are already bound to all. You have it already */ 5336 return; 5337 } 5338 #ifdef INET6 5339 if (ifa->address.sa.sa_family == AF_INET6) { 5340 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5341 /* Can't bind a non-useable addr. */ 5342 return; 5343 } 5344 } 5345 #endif 5346 /* first, is it already present? */ 5347 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5348 if (laddr->ifa == ifa) { 5349 fnd = 1; 5350 break; 5351 } 5352 } 5353 5354 if (fnd == 0) { 5355 /* Not in the ep list */ 5356 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5357 if (error != 0) 5358 return; 5359 inp->laddr_count++; 5360 /* update inp_vflag flags */ 5361 switch (ifa->address.sa.sa_family) { 5362 #ifdef INET6 5363 case AF_INET6: 5364 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5365 break; 5366 #endif 5367 #ifdef INET 5368 case AF_INET: 5369 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5370 break; 5371 #endif 5372 default: 5373 break; 5374 } 5375 } 5376 return; 5377 } 5378 5379 5380 /* 5381 * select a new (hopefully reachable) destination net (should only be used 5382 * when we deleted an ep addr that is the only usable source address to reach 5383 * the destination net) 5384 */ 5385 static void 5386 sctp_select_primary_destination(struct sctp_tcb *stcb) 5387 { 5388 struct sctp_nets *net; 5389 5390 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5391 /* for now, we'll just pick the first reachable one we find */ 5392 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5393 continue; 5394 if (sctp_destination_is_reachable(stcb, 5395 (struct sockaddr *)&net->ro._l_addr)) { 5396 /* found a reachable destination */ 5397 stcb->asoc.primary_destination = net; 5398 } 5399 } 5400 /* I can't there from here! ...we're gonna die shortly... */ 5401 } 5402 5403 5404 /* 5405 * Delete the address from the endpoint local address list There is nothing 5406 * to be done if we are bound to all addresses 5407 */ 5408 void 5409 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5410 { 5411 struct sctp_laddr *laddr; 5412 int fnd; 5413 5414 fnd = 0; 5415 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5416 /* You are already bound to all. You have it already */ 5417 return; 5418 } 5419 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5420 if (laddr->ifa == ifa) { 5421 fnd = 1; 5422 break; 5423 } 5424 } 5425 if (fnd && (inp->laddr_count < 2)) { 5426 /* can't delete unless there are at LEAST 2 addresses */ 5427 return; 5428 } 5429 if (fnd) { 5430 /* 5431 * clean up any use of this address go through our 5432 * associations and clear any last_used_address that match 5433 * this one for each assoc, see if a new primary_destination 5434 * is needed 5435 */ 5436 struct sctp_tcb *stcb; 5437 5438 /* clean up "next_addr_touse" */ 5439 if (inp->next_addr_touse == laddr) 5440 /* delete this address */ 5441 inp->next_addr_touse = NULL; 5442 5443 /* clean up "last_used_address" */ 5444 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5445 struct sctp_nets *net; 5446 5447 SCTP_TCB_LOCK(stcb); 5448 if (stcb->asoc.last_used_address == laddr) 5449 /* delete this address */ 5450 stcb->asoc.last_used_address = NULL; 5451 /* 5452 * Now spin through all the nets and purge any ref 5453 * to laddr 5454 */ 5455 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5456 if (net->ro._s_addr && 5457 (net->ro._s_addr->ifa == laddr->ifa)) { 5458 /* Yep, purge src address selected */ 5459 sctp_rtentry_t *rt; 5460 5461 /* delete this address if cached */ 5462 rt = net->ro.ro_rt; 5463 if (rt != NULL) { 5464 RTFREE(rt); 5465 net->ro.ro_rt = NULL; 5466 } 5467 sctp_free_ifa(net->ro._s_addr); 5468 net->ro._s_addr = NULL; 5469 net->src_addr_selected = 0; 5470 } 5471 } 5472 SCTP_TCB_UNLOCK(stcb); 5473 } /* for each tcb */ 5474 /* remove it from the ep list */ 5475 sctp_remove_laddr(laddr); 5476 inp->laddr_count--; 5477 /* update inp_vflag flags */ 5478 sctp_update_ep_vflag(inp); 5479 } 5480 return; 5481 } 5482 5483 /* 5484 * Add the address to the TCB local address restricted list. 5485 * This is a "pending" address list (eg. addresses waiting for an 5486 * ASCONF-ACK response) and cannot be used as a valid source address. 5487 */ 5488 void 5489 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5490 { 5491 struct sctp_laddr *laddr; 5492 struct sctpladdr *list; 5493 5494 /* 5495 * Assumes TCB is locked.. and possibly the INP. May need to 5496 * confirm/fix that if we need it and is not the case. 5497 */ 5498 list = &stcb->asoc.sctp_restricted_addrs; 5499 5500 #ifdef INET6 5501 if (ifa->address.sa.sa_family == AF_INET6) { 5502 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5503 /* Can't bind a non-existent addr. */ 5504 return; 5505 } 5506 } 5507 #endif 5508 /* does the address already exist? */ 5509 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5510 if (laddr->ifa == ifa) { 5511 return; 5512 } 5513 } 5514 5515 /* add to the list */ 5516 (void)sctp_insert_laddr(list, ifa, 0); 5517 return; 5518 } 5519 5520 /* 5521 * insert an laddr entry with the given ifa for the desired list 5522 */ 5523 int 5524 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5525 { 5526 struct sctp_laddr *laddr; 5527 5528 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5529 if (laddr == NULL) { 5530 /* out of memory? */ 5531 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5532 return (EINVAL); 5533 } 5534 SCTP_INCR_LADDR_COUNT(); 5535 bzero(laddr, sizeof(*laddr)); 5536 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5537 laddr->ifa = ifa; 5538 laddr->action = act; 5539 atomic_add_int(&ifa->refcount, 1); 5540 /* insert it */ 5541 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5542 5543 return (0); 5544 } 5545 5546 /* 5547 * Remove an laddr entry from the local address list (on an assoc) 5548 */ 5549 void 5550 sctp_remove_laddr(struct sctp_laddr *laddr) 5551 { 5552 5553 /* remove from the list */ 5554 LIST_REMOVE(laddr, sctp_nxt_addr); 5555 sctp_free_ifa(laddr->ifa); 5556 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5557 SCTP_DECR_LADDR_COUNT(); 5558 } 5559 5560 /* 5561 * Remove a local address from the TCB local address restricted list 5562 */ 5563 void 5564 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5565 { 5566 struct sctp_inpcb *inp; 5567 struct sctp_laddr *laddr; 5568 5569 /* 5570 * This is called by asconf work. It is assumed that a) The TCB is 5571 * locked and b) The INP is locked. This is true in as much as I can 5572 * trace through the entry asconf code where I did these locks. 5573 * Again, the ASCONF code is a bit different in that it does lock 5574 * the INP during its work often times. This must be since we don't 5575 * want other proc's looking up things while what they are looking 5576 * up is changing :-D 5577 */ 5578 5579 inp = stcb->sctp_ep; 5580 /* if subset bound and don't allow ASCONF's, can't delete last */ 5581 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5582 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5583 if (stcb->sctp_ep->laddr_count < 2) { 5584 /* can't delete last address */ 5585 return; 5586 } 5587 } 5588 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5589 /* remove the address if it exists */ 5590 if (laddr->ifa == NULL) 5591 continue; 5592 if (laddr->ifa == ifa) { 5593 sctp_remove_laddr(laddr); 5594 return; 5595 } 5596 } 5597 5598 /* address not found! */ 5599 return; 5600 } 5601 5602 /* 5603 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5604 */ 5605 /* sysctl */ 5606 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5607 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5608 5609 5610 5611 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5612 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5613 int *sctp_cpuarry = NULL; 5614 void 5615 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5616 { 5617 /* Queue a packet to a processor for the specified core */ 5618 struct sctp_mcore_queue *qent; 5619 struct sctp_mcore_ctrl *wkq; 5620 int need_wake = 0; 5621 5622 if (sctp_mcore_workers == NULL) { 5623 /* Something went way bad during setup */ 5624 sctp_input_with_port(m, off, 0); 5625 return; 5626 } 5627 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5628 (sizeof(struct sctp_mcore_queue)), 5629 SCTP_M_MCORE); 5630 if (qent == NULL) { 5631 /* This is trouble */ 5632 sctp_input_with_port(m, off, 0); 5633 return; 5634 } 5635 qent->vn = curvnet; 5636 qent->m = m; 5637 qent->off = off; 5638 qent->v6 = 0; 5639 wkq = &sctp_mcore_workers[cpu_to_use]; 5640 SCTP_MCORE_QLOCK(wkq); 5641 5642 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5643 if (wkq->running == 0) { 5644 need_wake = 1; 5645 } 5646 SCTP_MCORE_QUNLOCK(wkq); 5647 if (need_wake) { 5648 wakeup(&wkq->running); 5649 } 5650 } 5651 5652 static void 5653 sctp_mcore_thread(void *arg) 5654 { 5655 5656 struct sctp_mcore_ctrl *wkq; 5657 struct sctp_mcore_queue *qent; 5658 5659 wkq = (struct sctp_mcore_ctrl *)arg; 5660 struct mbuf *m; 5661 int off, v6; 5662 5663 /* Wait for first tickle */ 5664 SCTP_MCORE_LOCK(wkq); 5665 wkq->running = 0; 5666 msleep(&wkq->running, 5667 &wkq->core_mtx, 5668 0, "wait for pkt", 0); 5669 SCTP_MCORE_UNLOCK(wkq); 5670 5671 /* Bind to our cpu */ 5672 thread_lock(curthread); 5673 sched_bind(curthread, wkq->cpuid); 5674 thread_unlock(curthread); 5675 5676 /* Now lets start working */ 5677 SCTP_MCORE_LOCK(wkq); 5678 /* Now grab lock and go */ 5679 for (;;) { 5680 SCTP_MCORE_QLOCK(wkq); 5681 skip_sleep: 5682 wkq->running = 1; 5683 qent = TAILQ_FIRST(&wkq->que); 5684 if (qent) { 5685 TAILQ_REMOVE(&wkq->que, qent, next); 5686 SCTP_MCORE_QUNLOCK(wkq); 5687 CURVNET_SET(qent->vn); 5688 m = qent->m; 5689 off = qent->off; 5690 v6 = qent->v6; 5691 SCTP_FREE(qent, SCTP_M_MCORE); 5692 if (v6 == 0) { 5693 sctp_input_with_port(m, off, 0); 5694 } else { 5695 SCTP_PRINTF("V6 not yet supported\n"); 5696 sctp_m_freem(m); 5697 } 5698 CURVNET_RESTORE(); 5699 SCTP_MCORE_QLOCK(wkq); 5700 } 5701 wkq->running = 0; 5702 if (!TAILQ_EMPTY(&wkq->que)) { 5703 goto skip_sleep; 5704 } 5705 SCTP_MCORE_QUNLOCK(wkq); 5706 msleep(&wkq->running, 5707 &wkq->core_mtx, 5708 0, "wait for pkt", 0); 5709 } 5710 } 5711 5712 static void 5713 sctp_startup_mcore_threads(void) 5714 { 5715 int i, cpu; 5716 5717 if (mp_ncpus == 1) 5718 return; 5719 5720 if (sctp_mcore_workers != NULL) { 5721 /* 5722 * Already been here in some previous vnet? 5723 */ 5724 return; 5725 } 5726 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5727 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5728 SCTP_M_MCORE); 5729 if (sctp_mcore_workers == NULL) { 5730 /* TSNH I hope */ 5731 return; 5732 } 5733 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5734 sizeof(struct sctp_mcore_ctrl))); 5735 /* Init the structures */ 5736 for (i = 0; i <= mp_maxid; i++) { 5737 TAILQ_INIT(&sctp_mcore_workers[i].que); 5738 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5739 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5740 sctp_mcore_workers[i].cpuid = i; 5741 } 5742 if (sctp_cpuarry == NULL) { 5743 SCTP_MALLOC(sctp_cpuarry, int *, 5744 (mp_ncpus * sizeof(int)), 5745 SCTP_M_MCORE); 5746 i = 0; 5747 CPU_FOREACH(cpu) { 5748 sctp_cpuarry[i] = cpu; 5749 i++; 5750 } 5751 } 5752 /* Now start them all */ 5753 CPU_FOREACH(cpu) { 5754 (void)kproc_create(sctp_mcore_thread, 5755 (void *)&sctp_mcore_workers[cpu], 5756 &sctp_mcore_workers[cpu].thread_proc, 5757 RFPROC, 5758 SCTP_KTHREAD_PAGES, 5759 SCTP_MCORE_NAME); 5760 5761 } 5762 } 5763 5764 #endif 5765 5766 void 5767 sctp_pcb_init() 5768 { 5769 /* 5770 * SCTP initialization for the PCB structures should be called by 5771 * the sctp_init() funciton. 5772 */ 5773 int i; 5774 struct timeval tv; 5775 5776 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5777 /* error I was called twice */ 5778 return; 5779 } 5780 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5781 5782 #if defined(SCTP_LOCAL_TRACE_BUF) 5783 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5784 #endif 5785 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5786 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5787 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5788 SCTP_M_MCORE); 5789 #endif 5790 (void)SCTP_GETTIME_TIMEVAL(&tv); 5791 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5792 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5793 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5794 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5795 #else 5796 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5797 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5798 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5799 #endif 5800 /* init the empty list of (All) Endpoints */ 5801 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5802 5803 5804 /* init the hash table of endpoints */ 5805 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5806 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5807 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5808 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5809 &SCTP_BASE_INFO(hashasocmark)); 5810 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5811 &SCTP_BASE_INFO(hashmark)); 5812 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5813 &SCTP_BASE_INFO(hashtcpmark)); 5814 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5815 5816 5817 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5818 &SCTP_BASE_INFO(hashvrfmark)); 5819 5820 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5821 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5822 /* init the zones */ 5823 /* 5824 * FIX ME: Should check for NULL returns, but if it does fail we are 5825 * doomed to panic anyways... add later maybe. 5826 */ 5827 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5828 sizeof(struct sctp_inpcb), maxsockets); 5829 5830 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5831 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5832 5833 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5834 sizeof(struct sctp_laddr), 5835 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5836 5837 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5838 sizeof(struct sctp_nets), 5839 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5840 5841 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5842 sizeof(struct sctp_tmit_chunk), 5843 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5844 5845 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5846 sizeof(struct sctp_queued_to_read), 5847 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5848 5849 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5850 sizeof(struct sctp_stream_queue_pending), 5851 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5852 5853 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5854 sizeof(struct sctp_asconf), 5855 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5856 5857 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5858 sizeof(struct sctp_asconf_ack), 5859 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5860 5861 5862 /* Master Lock INIT for info structure */ 5863 SCTP_INP_INFO_LOCK_INIT(); 5864 SCTP_STATLOG_INIT_LOCK(); 5865 5866 SCTP_IPI_COUNT_INIT(); 5867 SCTP_IPI_ADDR_INIT(); 5868 #ifdef SCTP_PACKET_LOGGING 5869 SCTP_IP_PKTLOG_INIT(); 5870 #endif 5871 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5872 5873 SCTP_WQ_ADDR_INIT(); 5874 /* not sure if we need all the counts */ 5875 SCTP_BASE_INFO(ipi_count_ep) = 0; 5876 /* assoc/tcb zone info */ 5877 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5878 /* local addrlist zone info */ 5879 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5880 /* remote addrlist zone info */ 5881 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5882 /* chunk info */ 5883 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5884 5885 /* socket queue zone info */ 5886 SCTP_BASE_INFO(ipi_count_readq) = 0; 5887 5888 /* stream out queue cont */ 5889 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5890 5891 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5892 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5893 5894 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5895 5896 /* Init the TIMEWAIT list */ 5897 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5898 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5899 } 5900 sctp_startup_iterator(); 5901 5902 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5903 sctp_startup_mcore_threads(); 5904 #endif 5905 5906 /* 5907 * INIT the default VRF which for BSD is the only one, other O/S's 5908 * may have more. But initially they must start with one and then 5909 * add the VRF's as addresses are added. 5910 */ 5911 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5912 } 5913 5914 /* 5915 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5916 */ 5917 void 5918 sctp_pcb_finish(void) 5919 { 5920 struct sctp_vrflist *vrf_bucket; 5921 struct sctp_vrf *vrf, *nvrf; 5922 struct sctp_ifn *ifn, *nifn; 5923 struct sctp_ifa *ifa, *nifa; 5924 struct sctpvtaghead *chain; 5925 struct sctp_tagblock *twait_block, *prev_twait_block; 5926 struct sctp_laddr *wi, *nwi; 5927 int i; 5928 struct sctp_iterator *it, *nit; 5929 5930 /* 5931 * In FreeBSD the iterator thread never exits but we do clean up. 5932 * The only way FreeBSD reaches here is if we have VRF's but we 5933 * still add the ifdef to make it compile on old versions. 5934 */ 5935 SCTP_IPI_ITERATOR_WQ_LOCK(); 5936 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5937 if (it->vn != curvnet) { 5938 continue; 5939 } 5940 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5941 if (it->function_atend != NULL) { 5942 (*it->function_atend) (it->pointer, it->val); 5943 } 5944 SCTP_FREE(it, SCTP_M_ITER); 5945 } 5946 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5947 SCTP_ITERATOR_LOCK(); 5948 if ((sctp_it_ctl.cur_it) && 5949 (sctp_it_ctl.cur_it->vn == curvnet)) { 5950 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5951 } 5952 SCTP_ITERATOR_UNLOCK(); 5953 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5954 SCTP_WQ_ADDR_LOCK(); 5955 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5956 LIST_REMOVE(wi, sctp_nxt_addr); 5957 SCTP_DECR_LADDR_COUNT(); 5958 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5959 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5960 } 5961 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5962 } 5963 SCTP_WQ_ADDR_UNLOCK(); 5964 5965 /* 5966 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5967 * destroyed first). 5968 */ 5969 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5970 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5971 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5972 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5973 /* free the ifa */ 5974 LIST_REMOVE(ifa, next_bucket); 5975 LIST_REMOVE(ifa, next_ifa); 5976 SCTP_FREE(ifa, SCTP_M_IFA); 5977 } 5978 /* free the ifn */ 5979 LIST_REMOVE(ifn, next_bucket); 5980 LIST_REMOVE(ifn, next_ifn); 5981 SCTP_FREE(ifn, SCTP_M_IFN); 5982 } 5983 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5984 /* free the vrf */ 5985 LIST_REMOVE(vrf, next_vrf); 5986 SCTP_FREE(vrf, SCTP_M_VRF); 5987 } 5988 /* free the vrf hashes */ 5989 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5990 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5991 5992 /* 5993 * free the TIMEWAIT list elements malloc'd in the function 5994 * sctp_add_vtag_to_timewait()... 5995 */ 5996 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5997 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5998 if (!LIST_EMPTY(chain)) { 5999 prev_twait_block = NULL; 6000 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6001 if (prev_twait_block) { 6002 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6003 } 6004 prev_twait_block = twait_block; 6005 } 6006 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6007 } 6008 } 6009 6010 /* free the locks and mutexes */ 6011 #ifdef SCTP_PACKET_LOGGING 6012 SCTP_IP_PKTLOG_DESTROY(); 6013 #endif 6014 SCTP_IPI_ADDR_DESTROY(); 6015 SCTP_STATLOG_DESTROY(); 6016 SCTP_INP_INFO_LOCK_DESTROY(); 6017 6018 SCTP_WQ_ADDR_DESTROY(); 6019 6020 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6021 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6022 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6023 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6024 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6025 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6026 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6027 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6028 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6029 /* Get rid of other stuff to */ 6030 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6031 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6032 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6033 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6034 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6035 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6036 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6037 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6038 #endif 6039 } 6040 6041 6042 int 6043 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6044 int offset, int limit, 6045 struct sockaddr *src, struct sockaddr *dst, 6046 struct sockaddr *altsa) 6047 { 6048 /* 6049 * grub through the INIT pulling addresses and loading them to the 6050 * nets structure in the asoc. The from address in the mbuf should 6051 * also be loaded (if it is not already). This routine can be called 6052 * with either INIT or INIT-ACK's as long as the m points to the IP 6053 * packet and the offset points to the beginning of the parameters. 6054 */ 6055 struct sctp_inpcb *inp; 6056 struct sctp_nets *net, *nnet, *net_tmp; 6057 struct sctp_paramhdr *phdr, parm_buf; 6058 struct sctp_tcb *stcb_tmp; 6059 uint16_t ptype, plen; 6060 struct sockaddr *sa; 6061 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6062 struct sctp_auth_random *p_random = NULL; 6063 uint16_t random_len = 0; 6064 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6065 struct sctp_auth_hmac_algo *hmacs = NULL; 6066 uint16_t hmacs_len = 0; 6067 uint8_t saw_asconf = 0; 6068 uint8_t saw_asconf_ack = 0; 6069 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6070 struct sctp_auth_chunk_list *chunks = NULL; 6071 uint16_t num_chunks = 0; 6072 sctp_key_t *new_key; 6073 uint32_t keylen; 6074 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6075 uint8_t peer_supports_ecn; 6076 uint8_t peer_supports_prsctp; 6077 uint8_t peer_supports_auth; 6078 uint8_t peer_supports_asconf; 6079 uint8_t peer_supports_asconf_ack; 6080 uint8_t peer_supports_reconfig; 6081 uint8_t peer_supports_nrsack; 6082 uint8_t peer_supports_pktdrop; 6083 6084 #ifdef INET 6085 struct sockaddr_in sin; 6086 6087 #endif 6088 #ifdef INET6 6089 struct sockaddr_in6 sin6; 6090 6091 #endif 6092 6093 /* First get the destination address setup too. */ 6094 #ifdef INET 6095 memset(&sin, 0, sizeof(sin)); 6096 sin.sin_family = AF_INET; 6097 sin.sin_len = sizeof(sin); 6098 sin.sin_port = stcb->rport; 6099 #endif 6100 #ifdef INET6 6101 memset(&sin6, 0, sizeof(sin6)); 6102 sin6.sin6_family = AF_INET6; 6103 sin6.sin6_len = sizeof(struct sockaddr_in6); 6104 sin6.sin6_port = stcb->rport; 6105 #endif 6106 if (altsa) { 6107 sa = altsa; 6108 } else { 6109 sa = src; 6110 } 6111 peer_supports_ecn = 0; 6112 peer_supports_prsctp = 0; 6113 peer_supports_auth = 0; 6114 peer_supports_asconf = 0; 6115 peer_supports_reconfig = 0; 6116 peer_supports_nrsack = 0; 6117 peer_supports_pktdrop = 0; 6118 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6119 /* mark all addresses that we have currently on the list */ 6120 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6121 } 6122 /* does the source address already exist? if so skip it */ 6123 inp = stcb->sctp_ep; 6124 atomic_add_int(&stcb->asoc.refcnt, 1); 6125 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6126 atomic_add_int(&stcb->asoc.refcnt, -1); 6127 6128 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6129 /* we must add the source address */ 6130 /* no scope set here since we have a tcb already. */ 6131 switch (sa->sa_family) { 6132 #ifdef INET 6133 case AF_INET: 6134 if (stcb->asoc.scope.ipv4_addr_legal) { 6135 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6136 return (-1); 6137 } 6138 } 6139 break; 6140 #endif 6141 #ifdef INET6 6142 case AF_INET6: 6143 if (stcb->asoc.scope.ipv6_addr_legal) { 6144 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6145 return (-2); 6146 } 6147 } 6148 break; 6149 #endif 6150 default: 6151 break; 6152 } 6153 } else { 6154 if (net_tmp != NULL && stcb_tmp == stcb) { 6155 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6156 } else if (stcb_tmp != stcb) { 6157 /* It belongs to another association? */ 6158 if (stcb_tmp) 6159 SCTP_TCB_UNLOCK(stcb_tmp); 6160 return (-3); 6161 } 6162 } 6163 if (stcb->asoc.state == 0) { 6164 /* the assoc was freed? */ 6165 return (-4); 6166 } 6167 /* now we must go through each of the params. */ 6168 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6169 while (phdr) { 6170 ptype = ntohs(phdr->param_type); 6171 plen = ntohs(phdr->param_length); 6172 /* 6173 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6174 * (uint32_t)ptype, (int)plen); 6175 */ 6176 if (offset + plen > limit) { 6177 break; 6178 } 6179 if (plen == 0) { 6180 break; 6181 } 6182 #ifdef INET 6183 if (ptype == SCTP_IPV4_ADDRESS) { 6184 if (stcb->asoc.scope.ipv4_addr_legal) { 6185 struct sctp_ipv4addr_param *p4, p4_buf; 6186 6187 /* ok get the v4 address and check/add */ 6188 phdr = sctp_get_next_param(m, offset, 6189 (struct sctp_paramhdr *)&p4_buf, 6190 sizeof(p4_buf)); 6191 if (plen != sizeof(struct sctp_ipv4addr_param) || 6192 phdr == NULL) { 6193 return (-5); 6194 } 6195 p4 = (struct sctp_ipv4addr_param *)phdr; 6196 sin.sin_addr.s_addr = p4->addr; 6197 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6198 /* Skip multi-cast addresses */ 6199 goto next_param; 6200 } 6201 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6202 (sin.sin_addr.s_addr == INADDR_ANY)) { 6203 goto next_param; 6204 } 6205 sa = (struct sockaddr *)&sin; 6206 inp = stcb->sctp_ep; 6207 atomic_add_int(&stcb->asoc.refcnt, 1); 6208 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6209 dst, stcb); 6210 atomic_add_int(&stcb->asoc.refcnt, -1); 6211 6212 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6213 inp == NULL) { 6214 /* we must add the source address */ 6215 /* 6216 * no scope set since we have a tcb 6217 * already 6218 */ 6219 6220 /* 6221 * we must validate the state again 6222 * here 6223 */ 6224 add_it_now: 6225 if (stcb->asoc.state == 0) { 6226 /* the assoc was freed? */ 6227 return (-7); 6228 } 6229 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6230 return (-8); 6231 } 6232 } else if (stcb_tmp == stcb) { 6233 if (stcb->asoc.state == 0) { 6234 /* the assoc was freed? */ 6235 return (-10); 6236 } 6237 if (net != NULL) { 6238 /* clear flag */ 6239 net->dest_state &= 6240 ~SCTP_ADDR_NOT_IN_ASSOC; 6241 } 6242 } else { 6243 /* 6244 * strange, address is in another 6245 * assoc? straighten out locks. 6246 */ 6247 if (stcb_tmp) { 6248 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6249 struct mbuf *op_err; 6250 char msg[SCTP_DIAG_INFO_LEN]; 6251 6252 /* 6253 * in setup state we 6254 * abort this guy 6255 */ 6256 snprintf(msg, sizeof(msg), 6257 "%s:%d at %s", __FILE__, __LINE__, __func__); 6258 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6259 msg); 6260 sctp_abort_an_association(stcb_tmp->sctp_ep, 6261 stcb_tmp, op_err, 6262 SCTP_SO_NOT_LOCKED); 6263 goto add_it_now; 6264 } 6265 SCTP_TCB_UNLOCK(stcb_tmp); 6266 } 6267 if (stcb->asoc.state == 0) { 6268 /* the assoc was freed? */ 6269 return (-12); 6270 } 6271 return (-13); 6272 } 6273 } 6274 } else 6275 #endif 6276 #ifdef INET6 6277 if (ptype == SCTP_IPV6_ADDRESS) { 6278 if (stcb->asoc.scope.ipv6_addr_legal) { 6279 /* ok get the v6 address and check/add */ 6280 struct sctp_ipv6addr_param *p6, p6_buf; 6281 6282 phdr = sctp_get_next_param(m, offset, 6283 (struct sctp_paramhdr *)&p6_buf, 6284 sizeof(p6_buf)); 6285 if (plen != sizeof(struct sctp_ipv6addr_param) || 6286 phdr == NULL) { 6287 return (-14); 6288 } 6289 p6 = (struct sctp_ipv6addr_param *)phdr; 6290 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6291 sizeof(p6->addr)); 6292 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6293 /* Skip multi-cast addresses */ 6294 goto next_param; 6295 } 6296 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6297 /* 6298 * Link local make no sense without 6299 * scope 6300 */ 6301 goto next_param; 6302 } 6303 sa = (struct sockaddr *)&sin6; 6304 inp = stcb->sctp_ep; 6305 atomic_add_int(&stcb->asoc.refcnt, 1); 6306 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6307 dst, stcb); 6308 atomic_add_int(&stcb->asoc.refcnt, -1); 6309 if (stcb_tmp == NULL && 6310 (inp == stcb->sctp_ep || inp == NULL)) { 6311 /* 6312 * we must validate the state again 6313 * here 6314 */ 6315 add_it_now6: 6316 if (stcb->asoc.state == 0) { 6317 /* the assoc was freed? */ 6318 return (-16); 6319 } 6320 /* 6321 * we must add the address, no scope 6322 * set 6323 */ 6324 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6325 return (-17); 6326 } 6327 } else if (stcb_tmp == stcb) { 6328 /* 6329 * we must validate the state again 6330 * here 6331 */ 6332 if (stcb->asoc.state == 0) { 6333 /* the assoc was freed? */ 6334 return (-19); 6335 } 6336 if (net != NULL) { 6337 /* clear flag */ 6338 net->dest_state &= 6339 ~SCTP_ADDR_NOT_IN_ASSOC; 6340 } 6341 } else { 6342 /* 6343 * strange, address is in another 6344 * assoc? straighten out locks. 6345 */ 6346 if (stcb_tmp) { 6347 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6348 struct mbuf *op_err; 6349 char msg[SCTP_DIAG_INFO_LEN]; 6350 6351 /* 6352 * in setup state we 6353 * abort this guy 6354 */ 6355 snprintf(msg, sizeof(msg), 6356 "%s:%d at %s", __FILE__, __LINE__, __func__); 6357 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6358 msg); 6359 sctp_abort_an_association(stcb_tmp->sctp_ep, 6360 stcb_tmp, op_err, 6361 SCTP_SO_NOT_LOCKED); 6362 goto add_it_now6; 6363 } 6364 SCTP_TCB_UNLOCK(stcb_tmp); 6365 } 6366 if (stcb->asoc.state == 0) { 6367 /* the assoc was freed? */ 6368 return (-21); 6369 } 6370 return (-22); 6371 } 6372 } 6373 } else 6374 #endif 6375 if (ptype == SCTP_ECN_CAPABLE) { 6376 peer_supports_ecn = 1; 6377 } else if (ptype == SCTP_ULP_ADAPTATION) { 6378 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6379 struct sctp_adaptation_layer_indication ai, 6380 *aip; 6381 6382 phdr = sctp_get_next_param(m, offset, 6383 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6384 aip = (struct sctp_adaptation_layer_indication *)phdr; 6385 if (aip) { 6386 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6387 stcb->asoc.adaptation_needed = 1; 6388 } 6389 } 6390 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6391 struct sctp_asconf_addr_param lstore, *fee; 6392 int lptype; 6393 struct sockaddr *lsa = NULL; 6394 6395 #ifdef INET 6396 struct sctp_asconf_addrv4_param *fii; 6397 6398 #endif 6399 6400 if (stcb->asoc.asconf_supported == 0) { 6401 return (-100); 6402 } 6403 if (plen > sizeof(lstore)) { 6404 return (-23); 6405 } 6406 phdr = sctp_get_next_param(m, offset, 6407 (struct sctp_paramhdr *)&lstore, 6408 min(plen, sizeof(lstore))); 6409 if (phdr == NULL) { 6410 return (-24); 6411 } 6412 fee = (struct sctp_asconf_addr_param *)phdr; 6413 lptype = ntohs(fee->addrp.ph.param_type); 6414 switch (lptype) { 6415 #ifdef INET 6416 case SCTP_IPV4_ADDRESS: 6417 if (plen != 6418 sizeof(struct sctp_asconf_addrv4_param)) { 6419 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6420 (int)sizeof(struct sctp_asconf_addrv4_param), 6421 plen); 6422 } else { 6423 fii = (struct sctp_asconf_addrv4_param *)fee; 6424 sin.sin_addr.s_addr = fii->addrp.addr; 6425 lsa = (struct sockaddr *)&sin; 6426 } 6427 break; 6428 #endif 6429 #ifdef INET6 6430 case SCTP_IPV6_ADDRESS: 6431 if (plen != 6432 sizeof(struct sctp_asconf_addr_param)) { 6433 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6434 (int)sizeof(struct sctp_asconf_addr_param), 6435 plen); 6436 } else { 6437 memcpy(sin6.sin6_addr.s6_addr, 6438 fee->addrp.addr, 6439 sizeof(fee->addrp.addr)); 6440 lsa = (struct sockaddr *)&sin6; 6441 } 6442 break; 6443 #endif 6444 default: 6445 break; 6446 } 6447 if (lsa) { 6448 (void)sctp_set_primary_addr(stcb, sa, NULL); 6449 } 6450 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6451 stcb->asoc.peer_supports_nat = 1; 6452 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6453 /* Peer supports pr-sctp */ 6454 peer_supports_prsctp = 1; 6455 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6456 /* A supported extension chunk */ 6457 struct sctp_supported_chunk_types_param *pr_supported; 6458 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6459 int num_ent, i; 6460 6461 phdr = sctp_get_next_param(m, offset, 6462 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6463 if (phdr == NULL) { 6464 return (-25); 6465 } 6466 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6467 num_ent = plen - sizeof(struct sctp_paramhdr); 6468 for (i = 0; i < num_ent; i++) { 6469 switch (pr_supported->chunk_types[i]) { 6470 case SCTP_ASCONF: 6471 peer_supports_asconf = 1; 6472 break; 6473 case SCTP_ASCONF_ACK: 6474 peer_supports_asconf_ack = 1; 6475 break; 6476 case SCTP_FORWARD_CUM_TSN: 6477 peer_supports_prsctp = 1; 6478 break; 6479 case SCTP_PACKET_DROPPED: 6480 peer_supports_pktdrop = 1; 6481 break; 6482 case SCTP_NR_SELECTIVE_ACK: 6483 peer_supports_nrsack = 1; 6484 break; 6485 case SCTP_STREAM_RESET: 6486 peer_supports_reconfig = 1; 6487 break; 6488 case SCTP_AUTHENTICATION: 6489 peer_supports_auth = 1; 6490 break; 6491 default: 6492 /* one I have not learned yet */ 6493 break; 6494 6495 } 6496 } 6497 } else if (ptype == SCTP_RANDOM) { 6498 if (plen > sizeof(random_store)) 6499 break; 6500 if (got_random) { 6501 /* already processed a RANDOM */ 6502 goto next_param; 6503 } 6504 phdr = sctp_get_next_param(m, offset, 6505 (struct sctp_paramhdr *)random_store, 6506 min(sizeof(random_store), plen)); 6507 if (phdr == NULL) 6508 return (-26); 6509 p_random = (struct sctp_auth_random *)phdr; 6510 random_len = plen - sizeof(*p_random); 6511 /* enforce the random length */ 6512 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6513 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6514 return (-27); 6515 } 6516 got_random = 1; 6517 } else if (ptype == SCTP_HMAC_LIST) { 6518 uint16_t num_hmacs; 6519 uint16_t i; 6520 6521 if (plen > sizeof(hmacs_store)) 6522 break; 6523 if (got_hmacs) { 6524 /* already processed a HMAC list */ 6525 goto next_param; 6526 } 6527 phdr = sctp_get_next_param(m, offset, 6528 (struct sctp_paramhdr *)hmacs_store, 6529 min(plen, sizeof(hmacs_store))); 6530 if (phdr == NULL) 6531 return (-28); 6532 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6533 hmacs_len = plen - sizeof(*hmacs); 6534 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6535 /* validate the hmac list */ 6536 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6537 return (-29); 6538 } 6539 if (stcb->asoc.peer_hmacs != NULL) 6540 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6541 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6542 if (stcb->asoc.peer_hmacs != NULL) { 6543 for (i = 0; i < num_hmacs; i++) { 6544 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6545 ntohs(hmacs->hmac_ids[i])); 6546 } 6547 } 6548 got_hmacs = 1; 6549 } else if (ptype == SCTP_CHUNK_LIST) { 6550 int i; 6551 6552 if (plen > sizeof(chunks_store)) 6553 break; 6554 if (got_chklist) { 6555 /* already processed a Chunks list */ 6556 goto next_param; 6557 } 6558 phdr = sctp_get_next_param(m, offset, 6559 (struct sctp_paramhdr *)chunks_store, 6560 min(plen, sizeof(chunks_store))); 6561 if (phdr == NULL) 6562 return (-30); 6563 chunks = (struct sctp_auth_chunk_list *)phdr; 6564 num_chunks = plen - sizeof(*chunks); 6565 if (stcb->asoc.peer_auth_chunks != NULL) 6566 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6567 else 6568 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6569 for (i = 0; i < num_chunks; i++) { 6570 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6571 stcb->asoc.peer_auth_chunks); 6572 /* record asconf/asconf-ack if listed */ 6573 if (chunks->chunk_types[i] == SCTP_ASCONF) 6574 saw_asconf = 1; 6575 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6576 saw_asconf_ack = 1; 6577 6578 } 6579 got_chklist = 1; 6580 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6581 (ptype == SCTP_STATE_COOKIE) || 6582 (ptype == SCTP_UNRECOG_PARAM) || 6583 (ptype == SCTP_COOKIE_PRESERVE) || 6584 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6585 (ptype == SCTP_ADD_IP_ADDRESS) || 6586 (ptype == SCTP_DEL_IP_ADDRESS) || 6587 (ptype == SCTP_ERROR_CAUSE_IND) || 6588 (ptype == SCTP_SUCCESS_REPORT)) { 6589 /* don't care */ ; 6590 } else { 6591 if ((ptype & 0x8000) == 0x0000) { 6592 /* 6593 * must stop processing the rest of the 6594 * param's. Any report bits were handled 6595 * with the call to 6596 * sctp_arethere_unrecognized_parameters() 6597 * when the INIT or INIT-ACK was first seen. 6598 */ 6599 break; 6600 } 6601 } 6602 6603 next_param: 6604 offset += SCTP_SIZE32(plen); 6605 if (offset >= limit) { 6606 break; 6607 } 6608 phdr = sctp_get_next_param(m, offset, &parm_buf, 6609 sizeof(parm_buf)); 6610 } 6611 /* Now check to see if we need to purge any addresses */ 6612 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6613 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6614 SCTP_ADDR_NOT_IN_ASSOC) { 6615 /* This address has been removed from the asoc */ 6616 /* remove and free it */ 6617 stcb->asoc.numnets--; 6618 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6619 sctp_free_remote_addr(net); 6620 if (net == stcb->asoc.primary_destination) { 6621 stcb->asoc.primary_destination = NULL; 6622 sctp_select_primary_destination(stcb); 6623 } 6624 } 6625 } 6626 if ((stcb->asoc.ecn_supported == 1) && 6627 (peer_supports_ecn == 0)) { 6628 stcb->asoc.ecn_supported = 0; 6629 } 6630 if ((stcb->asoc.prsctp_supported == 1) && 6631 (peer_supports_prsctp == 0)) { 6632 stcb->asoc.prsctp_supported = 0; 6633 } 6634 if ((stcb->asoc.auth_supported == 1) && 6635 ((peer_supports_auth == 0) || 6636 (got_random == 0) || (got_hmacs == 0))) { 6637 stcb->asoc.auth_supported = 0; 6638 } 6639 if ((stcb->asoc.asconf_supported == 1) && 6640 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6641 (stcb->asoc.auth_supported == 0) || 6642 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6643 stcb->asoc.asconf_supported = 0; 6644 } 6645 if ((stcb->asoc.reconfig_supported == 1) && 6646 (peer_supports_reconfig == 0)) { 6647 stcb->asoc.reconfig_supported = 0; 6648 } 6649 if ((stcb->asoc.nrsack_supported == 1) && 6650 (peer_supports_nrsack == 0)) { 6651 stcb->asoc.nrsack_supported = 0; 6652 } 6653 if ((stcb->asoc.pktdrop_supported == 1) && 6654 (peer_supports_pktdrop == 0)) { 6655 stcb->asoc.pktdrop_supported = 0; 6656 } 6657 /* validate authentication required parameters */ 6658 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6659 /* peer does not support auth but sent a chunks list? */ 6660 return (-31); 6661 } 6662 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6663 /* peer supports asconf but not auth? */ 6664 return (-32); 6665 } else if ((peer_supports_asconf == 1) && 6666 (peer_supports_auth == 1) && 6667 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6668 return (-33); 6669 } 6670 /* concatenate the full random key */ 6671 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6672 if (chunks != NULL) { 6673 keylen += sizeof(*chunks) + num_chunks; 6674 } 6675 new_key = sctp_alloc_key(keylen); 6676 if (new_key != NULL) { 6677 /* copy in the RANDOM */ 6678 if (p_random != NULL) { 6679 keylen = sizeof(*p_random) + random_len; 6680 bcopy(p_random, new_key->key, keylen); 6681 } 6682 /* append in the AUTH chunks */ 6683 if (chunks != NULL) { 6684 bcopy(chunks, new_key->key + keylen, 6685 sizeof(*chunks) + num_chunks); 6686 keylen += sizeof(*chunks) + num_chunks; 6687 } 6688 /* append in the HMACs */ 6689 if (hmacs != NULL) { 6690 bcopy(hmacs, new_key->key + keylen, 6691 sizeof(*hmacs) + hmacs_len); 6692 } 6693 } else { 6694 /* failed to get memory for the key */ 6695 return (-34); 6696 } 6697 if (stcb->asoc.authinfo.peer_random != NULL) 6698 sctp_free_key(stcb->asoc.authinfo.peer_random); 6699 stcb->asoc.authinfo.peer_random = new_key; 6700 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6701 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6702 6703 return (0); 6704 } 6705 6706 int 6707 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6708 struct sctp_nets *net) 6709 { 6710 /* make sure the requested primary address exists in the assoc */ 6711 if (net == NULL && sa) 6712 net = sctp_findnet(stcb, sa); 6713 6714 if (net == NULL) { 6715 /* didn't find the requested primary address! */ 6716 return (-1); 6717 } else { 6718 /* set the primary address */ 6719 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6720 /* Must be confirmed, so queue to set */ 6721 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6722 return (0); 6723 } 6724 stcb->asoc.primary_destination = net; 6725 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6726 sctp_free_remote_addr(stcb->asoc.alternate); 6727 stcb->asoc.alternate = NULL; 6728 } 6729 net = TAILQ_FIRST(&stcb->asoc.nets); 6730 if (net != stcb->asoc.primary_destination) { 6731 /* 6732 * first one on the list is NOT the primary 6733 * sctp_cmpaddr() is much more efficient if the 6734 * primary is the first on the list, make it so. 6735 */ 6736 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6737 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6738 } 6739 return (0); 6740 } 6741 } 6742 6743 int 6744 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6745 { 6746 /* 6747 * This function serves two purposes. It will see if a TAG can be 6748 * re-used and return 1 for yes it is ok and 0 for don't use that 6749 * tag. A secondary function it will do is purge out old tags that 6750 * can be removed. 6751 */ 6752 struct sctpvtaghead *chain; 6753 struct sctp_tagblock *twait_block; 6754 struct sctpasochead *head; 6755 struct sctp_tcb *stcb; 6756 int i; 6757 6758 SCTP_INP_INFO_RLOCK(); 6759 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6760 SCTP_BASE_INFO(hashasocmark))]; 6761 LIST_FOREACH(stcb, head, sctp_asocs) { 6762 /* 6763 * We choose not to lock anything here. TCB's can't be 6764 * removed since we have the read lock, so they can't be 6765 * freed on us, same thing for the INP. I may be wrong with 6766 * this assumption, but we will go with it for now :-) 6767 */ 6768 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6769 continue; 6770 } 6771 if (stcb->asoc.my_vtag == tag) { 6772 /* candidate */ 6773 if (stcb->rport != rport) { 6774 continue; 6775 } 6776 if (stcb->sctp_ep->sctp_lport != lport) { 6777 continue; 6778 } 6779 /* Its a used tag set */ 6780 SCTP_INP_INFO_RUNLOCK(); 6781 return (0); 6782 } 6783 } 6784 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6785 /* Now what about timed wait ? */ 6786 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6787 /* 6788 * Block(s) are present, lets see if we have this tag in the 6789 * list 6790 */ 6791 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6792 if (twait_block->vtag_block[i].v_tag == 0) { 6793 /* not used */ 6794 continue; 6795 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6796 now->tv_sec) { 6797 /* Audit expires this guy */ 6798 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6799 twait_block->vtag_block[i].v_tag = 0; 6800 twait_block->vtag_block[i].lport = 0; 6801 twait_block->vtag_block[i].rport = 0; 6802 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6803 (twait_block->vtag_block[i].lport == lport) && 6804 (twait_block->vtag_block[i].rport == rport)) { 6805 /* Bad tag, sorry :< */ 6806 SCTP_INP_INFO_RUNLOCK(); 6807 return (0); 6808 } 6809 } 6810 } 6811 SCTP_INP_INFO_RUNLOCK(); 6812 return (1); 6813 } 6814 6815 static void 6816 sctp_drain_mbufs(struct sctp_tcb *stcb) 6817 { 6818 /* 6819 * We must hunt this association for MBUF's past the cumack (i.e. 6820 * out of order data that we can renege on). 6821 */ 6822 struct sctp_association *asoc; 6823 struct sctp_tmit_chunk *chk, *nchk; 6824 uint32_t cumulative_tsn_p1; 6825 struct sctp_queued_to_read *ctl, *nctl; 6826 int cnt, strmat; 6827 uint32_t gap, i; 6828 int fnd = 0; 6829 6830 /* We look for anything larger than the cum-ack + 1 */ 6831 6832 asoc = &stcb->asoc; 6833 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6834 /* none we can reneg on. */ 6835 return; 6836 } 6837 SCTP_STAT_INCR(sctps_protocol_drains_done); 6838 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6839 cnt = 0; 6840 /* First look in the re-assembly queue */ 6841 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6842 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6843 /* Yep it is above cum-ack */ 6844 cnt++; 6845 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6846 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6847 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6848 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6849 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6850 if (chk->data) { 6851 sctp_m_freem(chk->data); 6852 chk->data = NULL; 6853 } 6854 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6855 } 6856 } 6857 /* Ok that was fun, now we will drain all the inbound streams? */ 6858 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6859 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6860 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6861 /* Yep it is above cum-ack */ 6862 cnt++; 6863 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6864 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6865 sctp_ucount_decr(asoc->cnt_on_all_streams); 6866 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6867 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6868 if (ctl->data) { 6869 sctp_m_freem(ctl->data); 6870 ctl->data = NULL; 6871 } 6872 sctp_free_remote_addr(ctl->whoFrom); 6873 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6874 SCTP_DECR_READQ_COUNT(); 6875 } 6876 } 6877 } 6878 if (cnt) { 6879 /* We must back down to see what the new highest is */ 6880 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6881 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6882 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6883 asoc->highest_tsn_inside_map = i; 6884 fnd = 1; 6885 break; 6886 } 6887 } 6888 if (!fnd) { 6889 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6890 } 6891 /* 6892 * Question, should we go through the delivery queue? The 6893 * only reason things are on here is the app not reading OR 6894 * a p-d-api up. An attacker COULD send enough in to 6895 * initiate the PD-API and then send a bunch of stuff to 6896 * other streams... these would wind up on the delivery 6897 * queue.. and then we would not get to them. But in order 6898 * to do this I then have to back-track and un-deliver 6899 * sequence numbers in streams.. el-yucko. I think for now 6900 * we will NOT look at the delivery queue and leave it to be 6901 * something to consider later. An alternative would be to 6902 * abort the P-D-API with a notification and then deliver 6903 * the data.... Or another method might be to keep track of 6904 * how many times the situation occurs and if we see a 6905 * possible attack underway just abort the association. 6906 */ 6907 #ifdef SCTP_DEBUG 6908 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6909 #endif 6910 /* 6911 * Now do we need to find a new 6912 * asoc->highest_tsn_inside_map? 6913 */ 6914 asoc->last_revoke_count = cnt; 6915 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6916 /* sa_ignore NO_NULL_CHK */ 6917 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6918 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6919 } 6920 /* 6921 * Another issue, in un-setting the TSN's in the mapping array we 6922 * DID NOT adjust the highest_tsn marker. This will cause one of 6923 * two things to occur. It may cause us to do extra work in checking 6924 * for our mapping array movement. More importantly it may cause us 6925 * to SACK every datagram. This may not be a bad thing though since 6926 * we will recover once we get our cum-ack above and all this stuff 6927 * we dumped recovered. 6928 */ 6929 } 6930 6931 void 6932 sctp_drain() 6933 { 6934 /* 6935 * We must walk the PCB lists for ALL associations here. The system 6936 * is LOW on MBUF's and needs help. This is where reneging will 6937 * occur. We really hope this does NOT happen! 6938 */ 6939 VNET_ITERATOR_DECL(vnet_iter); 6940 VNET_LIST_RLOCK_NOSLEEP(); 6941 VNET_FOREACH(vnet_iter) { 6942 CURVNET_SET(vnet_iter); 6943 struct sctp_inpcb *inp; 6944 struct sctp_tcb *stcb; 6945 6946 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6947 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6948 #ifdef VIMAGE 6949 continue; 6950 #else 6951 return; 6952 #endif 6953 } 6954 SCTP_INP_INFO_RLOCK(); 6955 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6956 /* For each endpoint */ 6957 SCTP_INP_RLOCK(inp); 6958 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6959 /* For each association */ 6960 SCTP_TCB_LOCK(stcb); 6961 sctp_drain_mbufs(stcb); 6962 SCTP_TCB_UNLOCK(stcb); 6963 } 6964 SCTP_INP_RUNLOCK(inp); 6965 } 6966 SCTP_INP_INFO_RUNLOCK(); 6967 CURVNET_RESTORE(); 6968 } 6969 VNET_LIST_RUNLOCK_NOSLEEP(); 6970 } 6971 6972 /* 6973 * start a new iterator 6974 * iterates through all endpoints and associations based on the pcb_state 6975 * flags and asoc_state. "af" (mandatory) is executed for all matching 6976 * assocs and "ef" (optional) is executed when the iterator completes. 6977 * "inpf" (optional) is executed for each new endpoint as it is being 6978 * iterated through. inpe (optional) is called when the inp completes 6979 * its way through all the stcbs. 6980 */ 6981 int 6982 sctp_initiate_iterator(inp_func inpf, 6983 asoc_func af, 6984 inp_func inpe, 6985 uint32_t pcb_state, 6986 uint32_t pcb_features, 6987 uint32_t asoc_state, 6988 void *argp, 6989 uint32_t argi, 6990 end_func ef, 6991 struct sctp_inpcb *s_inp, 6992 uint8_t chunk_output_off) 6993 { 6994 struct sctp_iterator *it = NULL; 6995 6996 if (af == NULL) { 6997 return (-1); 6998 } 6999 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7000 SCTP_M_ITER); 7001 if (it == NULL) { 7002 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7003 return (ENOMEM); 7004 } 7005 memset(it, 0, sizeof(*it)); 7006 it->function_assoc = af; 7007 it->function_inp = inpf; 7008 if (inpf) 7009 it->done_current_ep = 0; 7010 else 7011 it->done_current_ep = 1; 7012 it->function_atend = ef; 7013 it->pointer = argp; 7014 it->val = argi; 7015 it->pcb_flags = pcb_state; 7016 it->pcb_features = pcb_features; 7017 it->asoc_state = asoc_state; 7018 it->function_inp_end = inpe; 7019 it->no_chunk_output = chunk_output_off; 7020 it->vn = curvnet; 7021 if (s_inp) { 7022 /* Assume lock is held here */ 7023 it->inp = s_inp; 7024 SCTP_INP_INCR_REF(it->inp); 7025 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7026 } else { 7027 SCTP_INP_INFO_RLOCK(); 7028 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7029 if (it->inp) { 7030 SCTP_INP_INCR_REF(it->inp); 7031 } 7032 SCTP_INP_INFO_RUNLOCK(); 7033 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7034 7035 } 7036 SCTP_IPI_ITERATOR_WQ_LOCK(); 7037 7038 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7039 if (sctp_it_ctl.iterator_running == 0) { 7040 sctp_wakeup_iterator(); 7041 } 7042 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7043 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7044 return (0); 7045 } 7046