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", __FUNCTION__); 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 __FUNCTION__); 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; 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 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1881 SCTP_BASE_INFO(hashmark))]; 1882 /* Kick out all non-listeners to the TCP hash */ 1883 LIST_FOREACH(tinp, head, sctp_hash) { 1884 if (tinp->sctp_lport != inp->sctp_lport) { 1885 continue; 1886 } 1887 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1888 continue; 1889 } 1890 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1891 continue; 1892 } 1893 if (tinp->sctp_socket->so_qlimit) { 1894 continue; 1895 } 1896 SCTP_INP_WLOCK(tinp); 1897 LIST_REMOVE(tinp, sctp_hash); 1898 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1899 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1900 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1901 SCTP_INP_WUNLOCK(tinp); 1902 } 1903 SCTP_INP_WLOCK(inp); 1904 /* Pull from where he was */ 1905 LIST_REMOVE(inp, sctp_hash); 1906 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1907 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1908 LIST_INSERT_HEAD(head, inp, sctp_hash); 1909 SCTP_INP_WUNLOCK(inp); 1910 SCTP_INP_RLOCK(inp); 1911 return (0); 1912 } 1913 1914 1915 struct sctp_inpcb * 1916 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1917 uint32_t vrf_id) 1918 { 1919 /* 1920 * First we check the hash table to see if someone has this port 1921 * bound with just the port. 1922 */ 1923 struct sctp_inpcb *inp; 1924 struct sctppcbhead *head; 1925 int lport; 1926 unsigned int i; 1927 1928 #ifdef INET 1929 struct sockaddr_in *sin; 1930 1931 #endif 1932 #ifdef INET6 1933 struct sockaddr_in6 *sin6; 1934 1935 #endif 1936 1937 switch (nam->sa_family) { 1938 #ifdef INET 1939 case AF_INET: 1940 sin = (struct sockaddr_in *)nam; 1941 lport = sin->sin_port; 1942 break; 1943 #endif 1944 #ifdef INET6 1945 case AF_INET6: 1946 sin6 = (struct sockaddr_in6 *)nam; 1947 lport = sin6->sin6_port; 1948 break; 1949 #endif 1950 default: 1951 return (NULL); 1952 } 1953 /* 1954 * I could cheat here and just cast to one of the types but we will 1955 * do it right. It also provides the check against an Unsupported 1956 * type too. 1957 */ 1958 /* Find the head of the ALLADDR chain */ 1959 if (have_lock == 0) { 1960 SCTP_INP_INFO_RLOCK(); 1961 } 1962 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1963 SCTP_BASE_INFO(hashmark))]; 1964 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1965 1966 /* 1967 * If the TCP model exists it could be that the main listening 1968 * endpoint is gone but there still exists a connected socket for 1969 * this guy. If so we can return the first one that we find. This 1970 * may NOT be the correct one so the caller should be wary on the 1971 * returned INP. Currently the only caller that sets find_tcp_pool 1972 * is in bindx where we are verifying that a user CAN bind the 1973 * address. He either has bound it already, or someone else has, or 1974 * its open to bind, so this is good enough. 1975 */ 1976 if (inp == NULL && find_tcp_pool) { 1977 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1978 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1979 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1980 if (inp) { 1981 break; 1982 } 1983 } 1984 } 1985 if (inp) { 1986 SCTP_INP_INCR_REF(inp); 1987 } 1988 if (have_lock == 0) { 1989 SCTP_INP_INFO_RUNLOCK(); 1990 } 1991 return (inp); 1992 } 1993 1994 1995 /* 1996 * Find an association for an endpoint with the pointer to whom you want to 1997 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1998 * need to change the *to to some other struct like a mbuf... 1999 */ 2000 struct sctp_tcb * 2001 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2002 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2003 uint32_t vrf_id) 2004 { 2005 struct sctp_inpcb *inp = NULL; 2006 struct sctp_tcb *stcb; 2007 2008 SCTP_INP_INFO_RLOCK(); 2009 if (find_tcp_pool) { 2010 if (inp_p != NULL) { 2011 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2012 vrf_id); 2013 } else { 2014 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2015 vrf_id); 2016 } 2017 if (stcb != NULL) { 2018 SCTP_INP_INFO_RUNLOCK(); 2019 return (stcb); 2020 } 2021 } 2022 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2023 if (inp_p != NULL) { 2024 *inp_p = inp; 2025 } 2026 SCTP_INP_INFO_RUNLOCK(); 2027 if (inp == NULL) { 2028 return (NULL); 2029 } 2030 /* 2031 * ok, we have an endpoint, now lets find the assoc for it (if any) 2032 * we now place the source address or from in the to of the find 2033 * endpoint call. Since in reality this chain is used from the 2034 * inbound packet side. 2035 */ 2036 if (inp_p != NULL) { 2037 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2038 NULL); 2039 } else { 2040 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2041 NULL); 2042 } 2043 return (stcb); 2044 } 2045 2046 2047 /* 2048 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2049 * find all addresses that the sender has specified in any address list. Each 2050 * address will be used to lookup the TCB and see if one exits. 2051 */ 2052 static struct sctp_tcb * 2053 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2054 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2055 struct sockaddr *dst) 2056 { 2057 struct sctp_paramhdr *phdr, parm_buf; 2058 2059 #if defined(INET) || defined(INET6) 2060 struct sctp_tcb *stcb; 2061 uint16_t ptype; 2062 2063 #endif 2064 uint16_t plen; 2065 2066 #ifdef INET 2067 struct sockaddr_in sin4; 2068 2069 #endif 2070 #ifdef INET6 2071 struct sockaddr_in6 sin6; 2072 2073 #endif 2074 2075 #ifdef INET 2076 memset(&sin4, 0, sizeof(sin4)); 2077 sin4.sin_len = sizeof(sin4); 2078 sin4.sin_family = AF_INET; 2079 sin4.sin_port = sh->src_port; 2080 #endif 2081 #ifdef INET6 2082 memset(&sin6, 0, sizeof(sin6)); 2083 sin6.sin6_len = sizeof(sin6); 2084 sin6.sin6_family = AF_INET6; 2085 sin6.sin6_port = sh->src_port; 2086 #endif 2087 2088 offset += sizeof(struct sctp_init_chunk); 2089 2090 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2091 while (phdr != NULL) { 2092 /* now we must see if we want the parameter */ 2093 #if defined(INET) || defined(INET6) 2094 ptype = ntohs(phdr->param_type); 2095 #endif 2096 plen = ntohs(phdr->param_length); 2097 if (plen == 0) { 2098 break; 2099 } 2100 #ifdef INET 2101 if (ptype == SCTP_IPV4_ADDRESS && 2102 plen == sizeof(struct sctp_ipv4addr_param)) { 2103 /* Get the rest of the address */ 2104 struct sctp_ipv4addr_param ip4_parm, *p4; 2105 2106 phdr = sctp_get_next_param(m, offset, 2107 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2108 if (phdr == NULL) { 2109 return (NULL); 2110 } 2111 p4 = (struct sctp_ipv4addr_param *)phdr; 2112 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2113 /* look it up */ 2114 stcb = sctp_findassociation_ep_addr(inp_p, 2115 (struct sockaddr *)&sin4, netp, dst, NULL); 2116 if (stcb != NULL) { 2117 return (stcb); 2118 } 2119 } 2120 #endif 2121 #ifdef INET6 2122 if (ptype == SCTP_IPV6_ADDRESS && 2123 plen == sizeof(struct sctp_ipv6addr_param)) { 2124 /* Get the rest of the address */ 2125 struct sctp_ipv6addr_param ip6_parm, *p6; 2126 2127 phdr = sctp_get_next_param(m, offset, 2128 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2129 if (phdr == NULL) { 2130 return (NULL); 2131 } 2132 p6 = (struct sctp_ipv6addr_param *)phdr; 2133 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2134 /* look it up */ 2135 stcb = sctp_findassociation_ep_addr(inp_p, 2136 (struct sockaddr *)&sin6, netp, dst, NULL); 2137 if (stcb != NULL) { 2138 return (stcb); 2139 } 2140 } 2141 #endif 2142 offset += SCTP_SIZE32(plen); 2143 phdr = sctp_get_next_param(m, offset, &parm_buf, 2144 sizeof(parm_buf)); 2145 } 2146 return (NULL); 2147 } 2148 2149 static struct sctp_tcb * 2150 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2151 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2152 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2153 { 2154 /* 2155 * Use my vtag to hash. If we find it we then verify the source addr 2156 * is in the assoc. If all goes well we save a bit on rec of a 2157 * packet. 2158 */ 2159 struct sctpasochead *head; 2160 struct sctp_nets *net; 2161 struct sctp_tcb *stcb; 2162 2163 SCTP_INP_INFO_RLOCK(); 2164 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2165 SCTP_BASE_INFO(hashasocmark))]; 2166 LIST_FOREACH(stcb, head, sctp_asocs) { 2167 SCTP_INP_RLOCK(stcb->sctp_ep); 2168 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2169 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2170 continue; 2171 } 2172 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2173 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2174 continue; 2175 } 2176 SCTP_TCB_LOCK(stcb); 2177 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2178 if (stcb->asoc.my_vtag == vtag) { 2179 /* candidate */ 2180 if (stcb->rport != rport) { 2181 SCTP_TCB_UNLOCK(stcb); 2182 continue; 2183 } 2184 if (stcb->sctp_ep->sctp_lport != lport) { 2185 SCTP_TCB_UNLOCK(stcb); 2186 continue; 2187 } 2188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2189 SCTP_TCB_UNLOCK(stcb); 2190 continue; 2191 } 2192 /* RRS:Need toaddr check here */ 2193 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2194 /* Endpoint does not own this address */ 2195 SCTP_TCB_UNLOCK(stcb); 2196 continue; 2197 } 2198 if (remote_tag) { 2199 /* 2200 * If we have both vtags that's all we match 2201 * on 2202 */ 2203 if (stcb->asoc.peer_vtag == remote_tag) { 2204 /* 2205 * If both tags match we consider it 2206 * conclusive and check NO 2207 * source/destination addresses 2208 */ 2209 goto conclusive; 2210 } 2211 } 2212 if (skip_src_check) { 2213 conclusive: 2214 if (from) { 2215 *netp = sctp_findnet(stcb, from); 2216 } else { 2217 *netp = NULL; /* unknown */ 2218 } 2219 if (inp_p) 2220 *inp_p = stcb->sctp_ep; 2221 SCTP_INP_INFO_RUNLOCK(); 2222 return (stcb); 2223 } 2224 net = sctp_findnet(stcb, from); 2225 if (net) { 2226 /* yep its him. */ 2227 *netp = net; 2228 SCTP_STAT_INCR(sctps_vtagexpress); 2229 *inp_p = stcb->sctp_ep; 2230 SCTP_INP_INFO_RUNLOCK(); 2231 return (stcb); 2232 } else { 2233 /* 2234 * not him, this should only happen in rare 2235 * cases so I peg it. 2236 */ 2237 SCTP_STAT_INCR(sctps_vtagbogus); 2238 } 2239 } 2240 SCTP_TCB_UNLOCK(stcb); 2241 } 2242 SCTP_INP_INFO_RUNLOCK(); 2243 return (NULL); 2244 } 2245 2246 2247 /* 2248 * Find an association with the pointer to the inbound IP packet. This can be 2249 * a IPv4 or IPv6 packet. 2250 */ 2251 struct sctp_tcb * 2252 sctp_findassociation_addr(struct mbuf *m, int offset, 2253 struct sockaddr *src, struct sockaddr *dst, 2254 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2255 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2256 { 2257 int find_tcp_pool; 2258 struct sctp_tcb *stcb; 2259 struct sctp_inpcb *inp; 2260 2261 if (sh->v_tag) { 2262 /* we only go down this path if vtag is non-zero */ 2263 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2264 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2265 if (stcb) { 2266 return (stcb); 2267 } 2268 } 2269 find_tcp_pool = 0; 2270 if ((ch->chunk_type != SCTP_INITIATION) && 2271 (ch->chunk_type != SCTP_INITIATION_ACK) && 2272 (ch->chunk_type != SCTP_COOKIE_ACK) && 2273 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2274 /* Other chunk types go to the tcp pool. */ 2275 find_tcp_pool = 1; 2276 } 2277 if (inp_p) { 2278 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2279 find_tcp_pool, vrf_id); 2280 inp = *inp_p; 2281 } else { 2282 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2283 find_tcp_pool, vrf_id); 2284 } 2285 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2286 if (stcb == NULL && inp) { 2287 /* Found a EP but not this address */ 2288 if ((ch->chunk_type == SCTP_INITIATION) || 2289 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2290 /*- 2291 * special hook, we do NOT return linp or an 2292 * association that is linked to an existing 2293 * association that is under the TCP pool (i.e. no 2294 * listener exists). The endpoint finding routine 2295 * will always find a listener before examining the 2296 * TCP pool. 2297 */ 2298 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2299 if (inp_p) { 2300 *inp_p = NULL; 2301 } 2302 return (NULL); 2303 } 2304 stcb = sctp_findassociation_special_addr(m, 2305 offset, sh, &inp, netp, dst); 2306 if (inp_p != NULL) { 2307 *inp_p = inp; 2308 } 2309 } 2310 } 2311 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2312 return (stcb); 2313 } 2314 2315 /* 2316 * lookup an association by an ASCONF lookup address. 2317 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2318 */ 2319 struct sctp_tcb * 2320 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2321 struct sockaddr *dst, struct sctphdr *sh, 2322 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2323 { 2324 struct sctp_tcb *stcb; 2325 union sctp_sockstore remote_store; 2326 struct sctp_paramhdr parm_buf, *phdr; 2327 int ptype; 2328 int zero_address = 0; 2329 2330 #ifdef INET 2331 struct sockaddr_in *sin; 2332 2333 #endif 2334 #ifdef INET6 2335 struct sockaddr_in6 *sin6; 2336 2337 #endif 2338 2339 memset(&remote_store, 0, sizeof(remote_store)); 2340 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2341 &parm_buf, sizeof(struct sctp_paramhdr)); 2342 if (phdr == NULL) { 2343 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2344 __FUNCTION__); 2345 return NULL; 2346 } 2347 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2348 /* get the correlation address */ 2349 switch (ptype) { 2350 #ifdef INET6 2351 case SCTP_IPV6_ADDRESS: 2352 { 2353 /* ipv6 address param */ 2354 struct sctp_ipv6addr_param *p6, p6_buf; 2355 2356 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2357 return NULL; 2358 } 2359 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2360 offset + sizeof(struct sctp_asconf_chunk), 2361 &p6_buf.ph, sizeof(*p6)); 2362 if (p6 == NULL) { 2363 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2364 __FUNCTION__); 2365 return (NULL); 2366 } 2367 sin6 = &remote_store.sin6; 2368 sin6->sin6_family = AF_INET6; 2369 sin6->sin6_len = sizeof(*sin6); 2370 sin6->sin6_port = sh->src_port; 2371 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2372 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2373 zero_address = 1; 2374 break; 2375 } 2376 #endif 2377 #ifdef INET 2378 case SCTP_IPV4_ADDRESS: 2379 { 2380 /* ipv4 address param */ 2381 struct sctp_ipv4addr_param *p4, p4_buf; 2382 2383 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2384 return NULL; 2385 } 2386 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2387 offset + sizeof(struct sctp_asconf_chunk), 2388 &p4_buf.ph, sizeof(*p4)); 2389 if (p4 == NULL) { 2390 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2391 __FUNCTION__); 2392 return (NULL); 2393 } 2394 sin = &remote_store.sin; 2395 sin->sin_family = AF_INET; 2396 sin->sin_len = sizeof(*sin); 2397 sin->sin_port = sh->src_port; 2398 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2399 if (sin->sin_addr.s_addr == INADDR_ANY) 2400 zero_address = 1; 2401 break; 2402 } 2403 #endif 2404 default: 2405 /* invalid address param type */ 2406 return NULL; 2407 } 2408 2409 if (zero_address) { 2410 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2411 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2412 if (stcb != NULL) { 2413 SCTP_INP_DECR_REF(*inp_p); 2414 } 2415 } else { 2416 stcb = sctp_findassociation_ep_addr(inp_p, 2417 &remote_store.sa, netp, 2418 dst, NULL); 2419 } 2420 return (stcb); 2421 } 2422 2423 2424 /* 2425 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2426 * addresses. This way if we don't get a bind we by default pick a ephemeral 2427 * port with all addresses bound. 2428 */ 2429 int 2430 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2431 { 2432 /* 2433 * we get called when a new endpoint starts up. We need to allocate 2434 * the sctp_inpcb structure from the zone and init it. Mark it as 2435 * unbound and find a port that we can use as an ephemeral with 2436 * INADDR_ANY. If the user binds later no problem we can then add in 2437 * the specific addresses. And setup the default parameters for the 2438 * EP. 2439 */ 2440 int i, error; 2441 struct sctp_inpcb *inp; 2442 struct sctp_pcb *m; 2443 struct timeval time; 2444 sctp_sharedkey_t *null_key; 2445 2446 error = 0; 2447 2448 SCTP_INP_INFO_WLOCK(); 2449 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2450 if (inp == NULL) { 2451 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2452 SCTP_INP_INFO_WUNLOCK(); 2453 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2454 return (ENOBUFS); 2455 } 2456 /* zap it */ 2457 bzero(inp, sizeof(*inp)); 2458 2459 /* bump generations */ 2460 /* setup socket pointers */ 2461 inp->sctp_socket = so; 2462 inp->ip_inp.inp.inp_socket = so; 2463 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2464 #ifdef INET6 2465 if (INP_SOCKAF(so) == AF_INET6) { 2466 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2467 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2468 } 2469 if (MODULE_GLOBAL(ip6_v6only)) { 2470 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2471 } 2472 } 2473 #endif 2474 inp->sctp_associd_counter = 1; 2475 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2476 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2477 inp->max_cwnd = 0; 2478 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2479 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2480 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2481 inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable); 2482 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2483 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2484 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2485 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2486 /* init the small hash table we use to track asocid <-> tcb */ 2487 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2488 if (inp->sctp_asocidhash == NULL) { 2489 crfree(inp->ip_inp.inp.inp_cred); 2490 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2491 SCTP_INP_INFO_WUNLOCK(); 2492 return (ENOBUFS); 2493 } 2494 #ifdef IPSEC 2495 { 2496 struct inpcbpolicy *pcb_sp = NULL; 2497 2498 error = ipsec_init_policy(so, &pcb_sp); 2499 /* Arrange to share the policy */ 2500 inp->ip_inp.inp.inp_sp = pcb_sp; 2501 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2502 } 2503 if (error != 0) { 2504 crfree(inp->ip_inp.inp.inp_cred); 2505 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2506 SCTP_INP_INFO_WUNLOCK(); 2507 return error; 2508 } 2509 #endif /* IPSEC */ 2510 SCTP_INCR_EP_COUNT(); 2511 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2512 SCTP_INP_INFO_WUNLOCK(); 2513 2514 so->so_pcb = (caddr_t)inp; 2515 2516 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2517 /* UDP style socket */ 2518 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2519 SCTP_PCB_FLAGS_UNBOUND); 2520 /* Be sure it is NON-BLOCKING IO for UDP */ 2521 /* SCTP_SET_SO_NBIO(so); */ 2522 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2523 /* TCP style socket */ 2524 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2525 SCTP_PCB_FLAGS_UNBOUND); 2526 /* Be sure we have blocking IO by default */ 2527 SCTP_CLEAR_SO_NBIO(so); 2528 } else { 2529 /* 2530 * unsupported socket type (RAW, etc)- in case we missed it 2531 * in protosw 2532 */ 2533 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2534 so->so_pcb = NULL; 2535 crfree(inp->ip_inp.inp.inp_cred); 2536 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2537 return (EOPNOTSUPP); 2538 } 2539 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2540 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2541 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2542 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2543 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2544 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2545 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2546 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2547 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2548 } 2549 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2550 &inp->sctp_hashmark); 2551 if (inp->sctp_tcbhash == NULL) { 2552 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2553 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2554 so->so_pcb = NULL; 2555 crfree(inp->ip_inp.inp.inp_cred); 2556 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2557 return (ENOBUFS); 2558 } 2559 inp->def_vrf_id = vrf_id; 2560 2561 SCTP_INP_INFO_WLOCK(); 2562 SCTP_INP_LOCK_INIT(inp); 2563 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2564 SCTP_INP_READ_INIT(inp); 2565 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2566 /* lock the new ep */ 2567 SCTP_INP_WLOCK(inp); 2568 2569 /* add it to the info area */ 2570 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2571 SCTP_INP_INFO_WUNLOCK(); 2572 2573 TAILQ_INIT(&inp->read_queue); 2574 LIST_INIT(&inp->sctp_addr_list); 2575 2576 LIST_INIT(&inp->sctp_asoc_list); 2577 2578 #ifdef SCTP_TRACK_FREED_ASOCS 2579 /* TEMP CODE */ 2580 LIST_INIT(&inp->sctp_asoc_free_list); 2581 #endif 2582 /* Init the timer structure for signature change */ 2583 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2584 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2585 2586 /* now init the actual endpoint default data */ 2587 m = &inp->sctp_ep; 2588 2589 /* setup the base timeout information */ 2590 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2591 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2592 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2593 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2594 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2595 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2596 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2597 /* all max/min max are in ms */ 2598 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2599 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2600 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2601 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2602 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2603 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2604 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2605 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2606 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2607 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2608 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2609 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2610 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2611 2612 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2613 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2614 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2615 /* number of streams to pre-open on a association */ 2616 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2617 2618 /* Add adaptation cookie */ 2619 m->adaptation_layer_indicator = 0; 2620 m->adaptation_layer_indicator_provided = 0; 2621 2622 /* seed random number generator */ 2623 m->random_counter = 1; 2624 m->store_at = SCTP_SIGNATURE_SIZE; 2625 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2626 sctp_fill_random_store(m); 2627 2628 /* Minimum cookie size */ 2629 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2630 sizeof(struct sctp_state_cookie); 2631 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2632 2633 /* Setup the initial secret */ 2634 (void)SCTP_GETTIME_TIMEVAL(&time); 2635 m->time_of_secret_change = time.tv_sec; 2636 2637 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2638 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2639 } 2640 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2641 2642 /* How long is a cookie good for ? */ 2643 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2644 /* 2645 * Initialize authentication parameters 2646 */ 2647 m->local_hmacs = sctp_default_supported_hmaclist(); 2648 m->local_auth_chunks = sctp_alloc_chunklist(); 2649 if (inp->asconf_supported) { 2650 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2651 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2652 } 2653 m->default_dscp = 0; 2654 #ifdef INET6 2655 m->default_flowlabel = 0; 2656 #endif 2657 m->port = 0; /* encapsulation disabled by default */ 2658 LIST_INIT(&m->shared_keys); 2659 /* add default NULL key as key id 0 */ 2660 null_key = sctp_alloc_sharedkey(); 2661 sctp_insert_sharedkey(&m->shared_keys, null_key); 2662 SCTP_INP_WUNLOCK(inp); 2663 #ifdef SCTP_LOG_CLOSING 2664 sctp_log_closing(inp, NULL, 12); 2665 #endif 2666 return (error); 2667 } 2668 2669 2670 void 2671 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2672 struct sctp_tcb *stcb) 2673 { 2674 struct sctp_nets *net; 2675 uint16_t lport, rport; 2676 struct sctppcbhead *head; 2677 struct sctp_laddr *laddr, *oladdr; 2678 2679 atomic_add_int(&stcb->asoc.refcnt, 1); 2680 SCTP_TCB_UNLOCK(stcb); 2681 SCTP_INP_INFO_WLOCK(); 2682 SCTP_INP_WLOCK(old_inp); 2683 SCTP_INP_WLOCK(new_inp); 2684 SCTP_TCB_LOCK(stcb); 2685 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2686 2687 new_inp->sctp_ep.time_of_secret_change = 2688 old_inp->sctp_ep.time_of_secret_change; 2689 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2690 sizeof(old_inp->sctp_ep.secret_key)); 2691 new_inp->sctp_ep.current_secret_number = 2692 old_inp->sctp_ep.current_secret_number; 2693 new_inp->sctp_ep.last_secret_number = 2694 old_inp->sctp_ep.last_secret_number; 2695 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2696 2697 /* make it so new data pours into the new socket */ 2698 stcb->sctp_socket = new_inp->sctp_socket; 2699 stcb->sctp_ep = new_inp; 2700 2701 /* Copy the port across */ 2702 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2703 rport = stcb->rport; 2704 /* Pull the tcb from the old association */ 2705 LIST_REMOVE(stcb, sctp_tcbhash); 2706 LIST_REMOVE(stcb, sctp_tcblist); 2707 if (stcb->asoc.in_asocid_hash) { 2708 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2709 } 2710 /* Now insert the new_inp into the TCP connected hash */ 2711 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2712 2713 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2714 /* Its safe to access */ 2715 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2716 2717 /* Now move the tcb into the endpoint list */ 2718 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2719 /* 2720 * Question, do we even need to worry about the ep-hash since we 2721 * only have one connection? Probably not :> so lets get rid of it 2722 * and not suck up any kernel memory in that. 2723 */ 2724 if (stcb->asoc.in_asocid_hash) { 2725 struct sctpasochead *lhd; 2726 2727 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2728 new_inp->hashasocidmark)]; 2729 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2730 } 2731 /* Ok. Let's restart timer. */ 2732 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2733 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2734 stcb, net); 2735 } 2736 2737 SCTP_INP_INFO_WUNLOCK(); 2738 if (new_inp->sctp_tcbhash != NULL) { 2739 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2740 new_inp->sctp_tcbhash = NULL; 2741 } 2742 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2743 /* Subset bound, so copy in the laddr list from the old_inp */ 2744 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2745 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2746 if (laddr == NULL) { 2747 /* 2748 * Gak, what can we do? This assoc is really 2749 * HOSED. We probably should send an abort 2750 * here. 2751 */ 2752 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2753 continue; 2754 } 2755 SCTP_INCR_LADDR_COUNT(); 2756 bzero(laddr, sizeof(*laddr)); 2757 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2758 laddr->ifa = oladdr->ifa; 2759 atomic_add_int(&laddr->ifa->refcount, 1); 2760 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2761 sctp_nxt_addr); 2762 new_inp->laddr_count++; 2763 if (oladdr == stcb->asoc.last_used_address) { 2764 stcb->asoc.last_used_address = laddr; 2765 } 2766 } 2767 } 2768 /* 2769 * Now any running timers need to be adjusted since we really don't 2770 * care if they are running or not just blast in the new_inp into 2771 * all of them. 2772 */ 2773 2774 stcb->asoc.dack_timer.ep = (void *)new_inp; 2775 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2776 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2777 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2778 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2779 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2780 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2781 /* now what about the nets? */ 2782 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2783 net->pmtu_timer.ep = (void *)new_inp; 2784 net->hb_timer.ep = (void *)new_inp; 2785 net->rxt_timer.ep = (void *)new_inp; 2786 } 2787 SCTP_INP_WUNLOCK(new_inp); 2788 SCTP_INP_WUNLOCK(old_inp); 2789 } 2790 2791 2792 2793 2794 /* sctp_ifap is used to bypass normal local address validation checks */ 2795 int 2796 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2797 struct sctp_ifa *sctp_ifap, struct thread *p) 2798 { 2799 /* bind a ep to a socket address */ 2800 struct sctppcbhead *head; 2801 struct sctp_inpcb *inp, *inp_tmp; 2802 struct inpcb *ip_inp; 2803 int port_reuse_active = 0; 2804 int bindall; 2805 uint16_t lport; 2806 int error; 2807 uint32_t vrf_id; 2808 2809 lport = 0; 2810 bindall = 1; 2811 inp = (struct sctp_inpcb *)so->so_pcb; 2812 ip_inp = (struct inpcb *)so->so_pcb; 2813 #ifdef SCTP_DEBUG 2814 if (addr) { 2815 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2816 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2817 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2818 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2819 } 2820 #endif 2821 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2822 /* already did a bind, subsequent binds NOT allowed ! */ 2823 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2824 return (EINVAL); 2825 } 2826 #ifdef INVARIANTS 2827 if (p == NULL) 2828 panic("null proc/thread"); 2829 #endif 2830 if (addr != NULL) { 2831 switch (addr->sa_family) { 2832 #ifdef INET 2833 case AF_INET: 2834 { 2835 struct sockaddr_in *sin; 2836 2837 /* IPV6_V6ONLY socket? */ 2838 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2839 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2840 return (EINVAL); 2841 } 2842 if (addr->sa_len != sizeof(*sin)) { 2843 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2844 return (EINVAL); 2845 } 2846 sin = (struct sockaddr_in *)addr; 2847 lport = sin->sin_port; 2848 /* 2849 * For LOOPBACK the prison_local_ip4() call 2850 * will transmute the ip address to the 2851 * proper value. 2852 */ 2853 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2854 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2855 return (error); 2856 } 2857 if (sin->sin_addr.s_addr != INADDR_ANY) { 2858 bindall = 0; 2859 } 2860 break; 2861 } 2862 #endif 2863 #ifdef INET6 2864 case AF_INET6: 2865 { 2866 /* 2867 * Only for pure IPv6 Address. (No IPv4 2868 * Mapped!) 2869 */ 2870 struct sockaddr_in6 *sin6; 2871 2872 sin6 = (struct sockaddr_in6 *)addr; 2873 2874 if (addr->sa_len != sizeof(*sin6)) { 2875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2876 return (EINVAL); 2877 } 2878 lport = sin6->sin6_port; 2879 /* 2880 * For LOOPBACK the prison_local_ip6() call 2881 * will transmute the ipv6 address to the 2882 * proper value. 2883 */ 2884 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2885 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2887 return (error); 2888 } 2889 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2890 bindall = 0; 2891 /* KAME hack: embed scopeid */ 2892 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2893 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2894 return (EINVAL); 2895 } 2896 } 2897 /* this must be cleared for ifa_ifwithaddr() */ 2898 sin6->sin6_scope_id = 0; 2899 break; 2900 } 2901 #endif 2902 default: 2903 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2904 return (EAFNOSUPPORT); 2905 } 2906 } 2907 SCTP_INP_INFO_WLOCK(); 2908 SCTP_INP_WLOCK(inp); 2909 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2910 vrf_id = inp->def_vrf_id; 2911 2912 /* increase our count due to the unlock we do */ 2913 SCTP_INP_INCR_REF(inp); 2914 if (lport) { 2915 /* 2916 * Did the caller specify a port? if so we must see if an ep 2917 * already has this one bound. 2918 */ 2919 /* got to be root to get at low ports */ 2920 if (ntohs(lport) < IPPORT_RESERVED) { 2921 if (p && (error = 2922 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2923 )) { 2924 SCTP_INP_DECR_REF(inp); 2925 SCTP_INP_WUNLOCK(inp); 2926 SCTP_INP_INFO_WUNLOCK(); 2927 return (error); 2928 } 2929 } 2930 SCTP_INP_WUNLOCK(inp); 2931 if (bindall) { 2932 vrf_id = inp->def_vrf_id; 2933 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2934 if (inp_tmp != NULL) { 2935 /* 2936 * lock guy returned and lower count note 2937 * that we are not bound so inp_tmp should 2938 * NEVER be inp. And it is this inp 2939 * (inp_tmp) that gets the reference bump, 2940 * so we must lower it. 2941 */ 2942 SCTP_INP_DECR_REF(inp_tmp); 2943 /* unlock info */ 2944 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2945 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2946 /* 2947 * Ok, must be one-2-one and 2948 * allowing port re-use 2949 */ 2950 port_reuse_active = 1; 2951 goto continue_anyway; 2952 } 2953 SCTP_INP_DECR_REF(inp); 2954 SCTP_INP_INFO_WUNLOCK(); 2955 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2956 return (EADDRINUSE); 2957 } 2958 } else { 2959 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2960 if (inp_tmp != NULL) { 2961 /* 2962 * lock guy returned and lower count note 2963 * that we are not bound so inp_tmp should 2964 * NEVER be inp. And it is this inp 2965 * (inp_tmp) that gets the reference bump, 2966 * so we must lower it. 2967 */ 2968 SCTP_INP_DECR_REF(inp_tmp); 2969 /* unlock info */ 2970 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2971 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2972 /* 2973 * Ok, must be one-2-one and 2974 * allowing port re-use 2975 */ 2976 port_reuse_active = 1; 2977 goto continue_anyway; 2978 } 2979 SCTP_INP_DECR_REF(inp); 2980 SCTP_INP_INFO_WUNLOCK(); 2981 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2982 return (EADDRINUSE); 2983 } 2984 } 2985 continue_anyway: 2986 SCTP_INP_WLOCK(inp); 2987 if (bindall) { 2988 /* verify that no lport is not used by a singleton */ 2989 if ((port_reuse_active == 0) && 2990 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2991 /* Sorry someone already has this one bound */ 2992 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2993 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2994 port_reuse_active = 1; 2995 } else { 2996 SCTP_INP_DECR_REF(inp); 2997 SCTP_INP_WUNLOCK(inp); 2998 SCTP_INP_INFO_WUNLOCK(); 2999 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3000 return (EADDRINUSE); 3001 } 3002 } 3003 } 3004 } else { 3005 uint16_t first, last, candidate; 3006 uint16_t count; 3007 int done; 3008 3009 if (ip_inp->inp_flags & INP_HIGHPORT) { 3010 first = MODULE_GLOBAL(ipport_hifirstauto); 3011 last = MODULE_GLOBAL(ipport_hilastauto); 3012 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3013 if (p && (error = 3014 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3015 )) { 3016 SCTP_INP_DECR_REF(inp); 3017 SCTP_INP_WUNLOCK(inp); 3018 SCTP_INP_INFO_WUNLOCK(); 3019 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3020 return (error); 3021 } 3022 first = MODULE_GLOBAL(ipport_lowfirstauto); 3023 last = MODULE_GLOBAL(ipport_lowlastauto); 3024 } else { 3025 first = MODULE_GLOBAL(ipport_firstauto); 3026 last = MODULE_GLOBAL(ipport_lastauto); 3027 } 3028 if (first > last) { 3029 uint16_t temp; 3030 3031 temp = first; 3032 first = last; 3033 last = temp; 3034 } 3035 count = last - first + 1; /* number of candidates */ 3036 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3037 3038 done = 0; 3039 while (!done) { 3040 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3041 done = 1; 3042 } 3043 if (!done) { 3044 if (--count == 0) { 3045 SCTP_INP_DECR_REF(inp); 3046 SCTP_INP_WUNLOCK(inp); 3047 SCTP_INP_INFO_WUNLOCK(); 3048 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3049 return (EADDRINUSE); 3050 } 3051 if (candidate == last) 3052 candidate = first; 3053 else 3054 candidate = candidate + 1; 3055 } 3056 } 3057 lport = htons(candidate); 3058 } 3059 SCTP_INP_DECR_REF(inp); 3060 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3061 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3062 /* 3063 * this really should not happen. The guy did a non-blocking 3064 * bind and then did a close at the same time. 3065 */ 3066 SCTP_INP_WUNLOCK(inp); 3067 SCTP_INP_INFO_WUNLOCK(); 3068 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3069 return (EINVAL); 3070 } 3071 /* ok we look clear to give out this port, so lets setup the binding */ 3072 if (bindall) { 3073 /* binding to all addresses, so just set in the proper flags */ 3074 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3075 /* set the automatic addr changes from kernel flag */ 3076 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3077 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3078 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3079 } else { 3080 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3081 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3082 } 3083 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3084 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3085 } else { 3086 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3087 } 3088 /* 3089 * set the automatic mobility_base from kernel flag (by 3090 * micchie) 3091 */ 3092 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3093 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3094 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3095 } else { 3096 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3097 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3098 } 3099 /* 3100 * set the automatic mobility_fasthandoff from kernel flag 3101 * (by micchie) 3102 */ 3103 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3106 } else { 3107 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3109 } 3110 } else { 3111 /* 3112 * bind specific, make sure flags is off and add a new 3113 * address structure to the sctp_addr_list inside the ep 3114 * structure. 3115 * 3116 * We will need to allocate one and insert it at the head. The 3117 * socketopt call can just insert new addresses in there as 3118 * well. It will also have to do the embed scope kame hack 3119 * too (before adding). 3120 */ 3121 struct sctp_ifa *ifa; 3122 union sctp_sockstore store; 3123 3124 memset(&store, 0, sizeof(store)); 3125 switch (addr->sa_family) { 3126 #ifdef INET 3127 case AF_INET: 3128 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3129 store.sin.sin_port = 0; 3130 break; 3131 #endif 3132 #ifdef INET6 3133 case AF_INET6: 3134 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3135 store.sin6.sin6_port = 0; 3136 break; 3137 #endif 3138 default: 3139 break; 3140 } 3141 /* 3142 * first find the interface with the bound address need to 3143 * zero out the port to find the address! yuck! can't do 3144 * this earlier since need port for sctp_pcb_findep() 3145 */ 3146 if (sctp_ifap != NULL) { 3147 ifa = sctp_ifap; 3148 } else { 3149 /* 3150 * Note for BSD we hit here always other O/S's will 3151 * pass things in via the sctp_ifap argument 3152 * (Panda). 3153 */ 3154 ifa = sctp_find_ifa_by_addr(&store.sa, 3155 vrf_id, SCTP_ADDR_NOT_LOCKED); 3156 } 3157 if (ifa == NULL) { 3158 /* Can't find an interface with that address */ 3159 SCTP_INP_WUNLOCK(inp); 3160 SCTP_INP_INFO_WUNLOCK(); 3161 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3162 return (EADDRNOTAVAIL); 3163 } 3164 #ifdef INET6 3165 if (addr->sa_family == AF_INET6) { 3166 /* GAK, more FIXME IFA lock? */ 3167 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3168 /* Can't bind a non-existent addr. */ 3169 SCTP_INP_WUNLOCK(inp); 3170 SCTP_INP_INFO_WUNLOCK(); 3171 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3172 return (EINVAL); 3173 } 3174 } 3175 #endif 3176 /* we're not bound all */ 3177 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3178 /* allow bindx() to send ASCONF's for binding changes */ 3179 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3180 /* clear automatic addr changes from kernel flag */ 3181 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3182 3183 /* add this address to the endpoint list */ 3184 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3185 if (error != 0) { 3186 SCTP_INP_WUNLOCK(inp); 3187 SCTP_INP_INFO_WUNLOCK(); 3188 return (error); 3189 } 3190 inp->laddr_count++; 3191 } 3192 /* find the bucket */ 3193 if (port_reuse_active) { 3194 /* Put it into tcp 1-2-1 hash */ 3195 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3196 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3197 } else { 3198 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3199 } 3200 /* put it in the bucket */ 3201 LIST_INSERT_HEAD(head, inp, sctp_hash); 3202 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3203 (void *)head, ntohs(lport), port_reuse_active); 3204 /* set in the port */ 3205 inp->sctp_lport = lport; 3206 3207 /* turn off just the unbound flag */ 3208 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3209 SCTP_INP_WUNLOCK(inp); 3210 SCTP_INP_INFO_WUNLOCK(); 3211 return (0); 3212 } 3213 3214 3215 static void 3216 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3217 { 3218 struct sctp_iterator *it, *nit; 3219 3220 /* 3221 * We enter with the only the ITERATOR_LOCK in place and a write 3222 * lock on the inp_info stuff. 3223 */ 3224 it = sctp_it_ctl.cur_it; 3225 if (it && (it->vn != curvnet)) { 3226 /* Its not looking at our VNET */ 3227 return; 3228 } 3229 if (it && (it->inp == inp)) { 3230 /* 3231 * This is tricky and we hold the iterator lock, but when it 3232 * returns and gets the lock (when we release it) the 3233 * iterator will try to operate on inp. We need to stop that 3234 * from happening. But of course the iterator has a 3235 * reference on the stcb and inp. We can mark it and it will 3236 * stop. 3237 * 3238 * If its a single iterator situation, we set the end iterator 3239 * flag. Otherwise we set the iterator to go to the next 3240 * inp. 3241 * 3242 */ 3243 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3244 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3245 } else { 3246 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3247 } 3248 } 3249 /* 3250 * Now go through and remove any single reference to our inp that 3251 * may be still pending on the list 3252 */ 3253 SCTP_IPI_ITERATOR_WQ_LOCK(); 3254 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3255 if (it->vn != curvnet) { 3256 continue; 3257 } 3258 if (it->inp == inp) { 3259 /* This one points to me is it inp specific? */ 3260 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3261 /* Remove and free this one */ 3262 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3263 it, sctp_nxt_itr); 3264 if (it->function_atend != NULL) { 3265 (*it->function_atend) (it->pointer, it->val); 3266 } 3267 SCTP_FREE(it, SCTP_M_ITER); 3268 } else { 3269 it->inp = LIST_NEXT(it->inp, sctp_list); 3270 if (it->inp) { 3271 SCTP_INP_INCR_REF(it->inp); 3272 } 3273 } 3274 /* 3275 * When its put in the refcnt is incremented so decr 3276 * it 3277 */ 3278 SCTP_INP_DECR_REF(inp); 3279 } 3280 } 3281 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3282 } 3283 3284 /* release sctp_inpcb unbind the port */ 3285 void 3286 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3287 { 3288 /* 3289 * Here we free a endpoint. We must find it (if it is in the Hash 3290 * table) and remove it from there. Then we must also find it in the 3291 * overall list and remove it from there. After all removals are 3292 * complete then any timer has to be stopped. Then start the actual 3293 * freeing. a) Any local lists. b) Any associations. c) The hash of 3294 * all associations. d) finally the ep itself. 3295 */ 3296 struct sctp_tcb *asoc, *nasoc; 3297 struct sctp_laddr *laddr, *nladdr; 3298 struct inpcb *ip_pcb; 3299 struct socket *so; 3300 int being_refed = 0; 3301 struct sctp_queued_to_read *sq, *nsq; 3302 int cnt; 3303 sctp_sharedkey_t *shared_key, *nshared_key; 3304 3305 3306 #ifdef SCTP_LOG_CLOSING 3307 sctp_log_closing(inp, NULL, 0); 3308 #endif 3309 SCTP_ITERATOR_LOCK(); 3310 /* mark any iterators on the list or being processed */ 3311 sctp_iterator_inp_being_freed(inp); 3312 SCTP_ITERATOR_UNLOCK(); 3313 so = inp->sctp_socket; 3314 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3315 /* been here before.. eeks.. get out of here */ 3316 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3317 #ifdef SCTP_LOG_CLOSING 3318 sctp_log_closing(inp, NULL, 1); 3319 #endif 3320 return; 3321 } 3322 SCTP_ASOC_CREATE_LOCK(inp); 3323 SCTP_INP_INFO_WLOCK(); 3324 3325 SCTP_INP_WLOCK(inp); 3326 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3327 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3328 /* socket is gone, so no more wakeups allowed */ 3329 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3330 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3331 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3332 3333 } 3334 /* First time through we have the socket lock, after that no more. */ 3335 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3336 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3337 3338 if (inp->control) { 3339 sctp_m_freem(inp->control); 3340 inp->control = NULL; 3341 } 3342 if (inp->pkt) { 3343 sctp_m_freem(inp->pkt); 3344 inp->pkt = NULL; 3345 } 3346 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3347 * here but I will be nice :> (i.e. 3348 * ip_pcb = ep;) */ 3349 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3350 int cnt_in_sd; 3351 3352 cnt_in_sd = 0; 3353 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3354 SCTP_TCB_LOCK(asoc); 3355 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3356 /* Skip guys being freed */ 3357 cnt_in_sd++; 3358 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3359 /* 3360 * Special case - we did not start a 3361 * kill timer on the asoc due to it 3362 * was not closed. So go ahead and 3363 * start it now. 3364 */ 3365 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3366 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3367 } 3368 SCTP_TCB_UNLOCK(asoc); 3369 continue; 3370 } 3371 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3372 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3373 (asoc->asoc.total_output_queue_size == 0)) { 3374 /* 3375 * If we have data in queue, we don't want 3376 * to just free since the app may have done, 3377 * send()/close or connect/send/close. And 3378 * it wants the data to get across first. 3379 */ 3380 /* Just abandon things in the front states */ 3381 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3382 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3383 cnt_in_sd++; 3384 } 3385 continue; 3386 } 3387 /* Disconnect the socket please */ 3388 asoc->sctp_socket = NULL; 3389 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3390 if ((asoc->asoc.size_on_reasm_queue > 0) || 3391 (asoc->asoc.control_pdapi) || 3392 (asoc->asoc.size_on_all_streams > 0) || 3393 (so && (so->so_rcv.sb_cc > 0))) { 3394 /* Left with Data unread */ 3395 struct mbuf *op_err; 3396 3397 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3398 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3399 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3400 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3401 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3402 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3403 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3404 } 3405 if (sctp_free_assoc(inp, asoc, 3406 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3407 cnt_in_sd++; 3408 } 3409 continue; 3410 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3411 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3412 (asoc->asoc.stream_queue_cnt == 0)) { 3413 if (asoc->asoc.locked_on_sending) { 3414 goto abort_anyway; 3415 } 3416 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3417 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3418 struct sctp_nets *netp; 3419 3420 /* 3421 * there is nothing queued to send, 3422 * so I send shutdown 3423 */ 3424 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3425 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3426 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3427 } 3428 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3429 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3430 sctp_stop_timers_for_shutdown(asoc); 3431 if (asoc->asoc.alternate) { 3432 netp = asoc->asoc.alternate; 3433 } else { 3434 netp = asoc->asoc.primary_destination; 3435 } 3436 sctp_send_shutdown(asoc, netp); 3437 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3438 netp); 3439 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3440 asoc->asoc.primary_destination); 3441 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3442 } 3443 } else { 3444 /* mark into shutdown pending */ 3445 struct sctp_stream_queue_pending *sp; 3446 3447 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3448 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3449 asoc->asoc.primary_destination); 3450 if (asoc->asoc.locked_on_sending) { 3451 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3452 sctp_streamhead); 3453 if (sp == NULL) { 3454 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3455 (void *)asoc->asoc.locked_on_sending, 3456 asoc->asoc.locked_on_sending->stream_no); 3457 } else { 3458 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3459 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3460 } 3461 } 3462 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3463 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3464 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3465 struct mbuf *op_err; 3466 3467 abort_anyway: 3468 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3469 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3470 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3471 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3472 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3473 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3474 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3475 } 3476 if (sctp_free_assoc(inp, asoc, 3477 SCTP_PCBFREE_NOFORCE, 3478 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3479 cnt_in_sd++; 3480 } 3481 continue; 3482 } else { 3483 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3484 } 3485 } 3486 cnt_in_sd++; 3487 SCTP_TCB_UNLOCK(asoc); 3488 } 3489 /* now is there some left in our SHUTDOWN state? */ 3490 if (cnt_in_sd) { 3491 #ifdef SCTP_LOG_CLOSING 3492 sctp_log_closing(inp, NULL, 2); 3493 #endif 3494 inp->sctp_socket = NULL; 3495 SCTP_INP_WUNLOCK(inp); 3496 SCTP_ASOC_CREATE_UNLOCK(inp); 3497 SCTP_INP_INFO_WUNLOCK(); 3498 return; 3499 } 3500 } 3501 inp->sctp_socket = NULL; 3502 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3503 SCTP_PCB_FLAGS_UNBOUND) { 3504 /* 3505 * ok, this guy has been bound. It's port is somewhere in 3506 * the SCTP_BASE_INFO(hash table). Remove it! 3507 */ 3508 LIST_REMOVE(inp, sctp_hash); 3509 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3510 } 3511 /* 3512 * If there is a timer running to kill us, forget it, since it may 3513 * have a contest on the INP lock.. which would cause us to die ... 3514 */ 3515 cnt = 0; 3516 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3517 SCTP_TCB_LOCK(asoc); 3518 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3519 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3520 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3521 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3522 } 3523 cnt++; 3524 SCTP_TCB_UNLOCK(asoc); 3525 continue; 3526 } 3527 /* Free associations that are NOT killing us */ 3528 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3529 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3530 struct mbuf *op_err; 3531 3532 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3533 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3534 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3535 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3536 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3537 cnt++; 3538 SCTP_TCB_UNLOCK(asoc); 3539 continue; 3540 } 3541 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3542 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3543 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3544 } 3545 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3546 cnt++; 3547 } 3548 } 3549 if (cnt) { 3550 /* Ok we have someone out there that will kill us */ 3551 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3552 #ifdef SCTP_LOG_CLOSING 3553 sctp_log_closing(inp, NULL, 3); 3554 #endif 3555 SCTP_INP_WUNLOCK(inp); 3556 SCTP_ASOC_CREATE_UNLOCK(inp); 3557 SCTP_INP_INFO_WUNLOCK(); 3558 return; 3559 } 3560 if (SCTP_INP_LOCK_CONTENDED(inp)) 3561 being_refed++; 3562 if (SCTP_INP_READ_CONTENDED(inp)) 3563 being_refed++; 3564 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3565 being_refed++; 3566 3567 if ((inp->refcount) || 3568 (being_refed) || 3569 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3570 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3571 #ifdef SCTP_LOG_CLOSING 3572 sctp_log_closing(inp, NULL, 4); 3573 #endif 3574 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3575 SCTP_INP_WUNLOCK(inp); 3576 SCTP_ASOC_CREATE_UNLOCK(inp); 3577 SCTP_INP_INFO_WUNLOCK(); 3578 return; 3579 } 3580 inp->sctp_ep.signature_change.type = 0; 3581 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3582 /* 3583 * Remove it from the list .. last thing we need a lock for. 3584 */ 3585 LIST_REMOVE(inp, sctp_list); 3586 SCTP_INP_WUNLOCK(inp); 3587 SCTP_ASOC_CREATE_UNLOCK(inp); 3588 SCTP_INP_INFO_WUNLOCK(); 3589 /* 3590 * Now we release all locks. Since this INP cannot be found anymore 3591 * except possibly by the kill timer that might be running. We call 3592 * the drain function here. It should hit the case were it sees the 3593 * ACTIVE flag cleared and exit out freeing us to proceed and 3594 * destroy everything. 3595 */ 3596 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3597 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3598 } else { 3599 /* Probably un-needed */ 3600 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3601 } 3602 3603 #ifdef SCTP_LOG_CLOSING 3604 sctp_log_closing(inp, NULL, 5); 3605 #endif 3606 3607 3608 if ((inp->sctp_asocidhash) != NULL) { 3609 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3610 inp->sctp_asocidhash = NULL; 3611 } 3612 /* sa_ignore FREED_MEMORY */ 3613 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3614 /* Its only abandoned if it had data left */ 3615 if (sq->length) 3616 SCTP_STAT_INCR(sctps_left_abandon); 3617 3618 TAILQ_REMOVE(&inp->read_queue, sq, next); 3619 sctp_free_remote_addr(sq->whoFrom); 3620 if (so) 3621 so->so_rcv.sb_cc -= sq->length; 3622 if (sq->data) { 3623 sctp_m_freem(sq->data); 3624 sq->data = NULL; 3625 } 3626 /* 3627 * no need to free the net count, since at this point all 3628 * assoc's are gone. 3629 */ 3630 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3631 SCTP_DECR_READQ_COUNT(); 3632 } 3633 /* Now the sctp_pcb things */ 3634 /* 3635 * free each asoc if it is not already closed/free. we can't use the 3636 * macro here since le_next will get freed as part of the 3637 * sctp_free_assoc() call. 3638 */ 3639 if (so) { 3640 #ifdef IPSEC 3641 ipsec_delete_pcbpolicy(ip_pcb); 3642 #endif /* IPSEC */ 3643 3644 /* Unlocks not needed since the socket is gone now */ 3645 } 3646 if (ip_pcb->inp_options) { 3647 (void)sctp_m_free(ip_pcb->inp_options); 3648 ip_pcb->inp_options = 0; 3649 } 3650 #ifdef INET6 3651 if (ip_pcb->inp_vflag & INP_IPV6) { 3652 struct in6pcb *in6p; 3653 3654 in6p = (struct in6pcb *)inp; 3655 ip6_freepcbopts(in6p->in6p_outputopts); 3656 } 3657 #endif /* INET6 */ 3658 ip_pcb->inp_vflag = 0; 3659 /* free up authentication fields */ 3660 if (inp->sctp_ep.local_auth_chunks != NULL) 3661 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3662 if (inp->sctp_ep.local_hmacs != NULL) 3663 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3664 3665 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3666 LIST_REMOVE(shared_key, next); 3667 sctp_free_sharedkey(shared_key); 3668 /* sa_ignore FREED_MEMORY */ 3669 } 3670 3671 /* 3672 * if we have an address list the following will free the list of 3673 * ifaddr's that are set into this ep. Again macro limitations here, 3674 * since the LIST_FOREACH could be a bad idea. 3675 */ 3676 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3677 sctp_remove_laddr(laddr); 3678 } 3679 3680 #ifdef SCTP_TRACK_FREED_ASOCS 3681 /* TEMP CODE */ 3682 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3683 LIST_REMOVE(asoc, sctp_tcblist); 3684 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3685 SCTP_DECR_ASOC_COUNT(); 3686 } 3687 /* *** END TEMP CODE *** */ 3688 #endif 3689 /* Now lets see about freeing the EP hash table. */ 3690 if (inp->sctp_tcbhash != NULL) { 3691 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3692 inp->sctp_tcbhash = NULL; 3693 } 3694 /* Now we must put the ep memory back into the zone pool */ 3695 crfree(inp->ip_inp.inp.inp_cred); 3696 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3697 SCTP_INP_LOCK_DESTROY(inp); 3698 SCTP_INP_READ_DESTROY(inp); 3699 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3700 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3701 SCTP_DECR_EP_COUNT(); 3702 } 3703 3704 3705 struct sctp_nets * 3706 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3707 { 3708 struct sctp_nets *net; 3709 3710 /* locate the address */ 3711 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3712 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3713 return (net); 3714 } 3715 return (NULL); 3716 } 3717 3718 3719 int 3720 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3721 { 3722 struct sctp_ifa *sctp_ifa; 3723 3724 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3725 if (sctp_ifa) { 3726 return (1); 3727 } else { 3728 return (0); 3729 } 3730 } 3731 3732 /* 3733 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3734 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3735 * stats of stuff. 3736 */ 3737 int 3738 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3739 struct sctp_nets **netp, int set_scope, int from) 3740 { 3741 /* 3742 * The following is redundant to the same lines in the 3743 * sctp_aloc_assoc() but is needed since others call the add address 3744 * function 3745 */ 3746 struct sctp_nets *net, *netfirst; 3747 int addr_inscope; 3748 3749 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3750 from); 3751 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3752 3753 netfirst = sctp_findnet(stcb, newaddr); 3754 if (netfirst) { 3755 /* 3756 * Lie and return ok, we don't want to make the association 3757 * go away for this behavior. It will happen in the TCP 3758 * model in a connected socket. It does not reach the hash 3759 * table until after the association is built so it can't be 3760 * found. Mark as reachable, since the initial creation will 3761 * have been cleared and the NOT_IN_ASSOC flag will have 3762 * been added... and we don't want to end up removing it 3763 * back out. 3764 */ 3765 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3766 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3767 SCTP_ADDR_UNCONFIRMED); 3768 } else { 3769 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3770 } 3771 3772 return (0); 3773 } 3774 addr_inscope = 1; 3775 switch (newaddr->sa_family) { 3776 #ifdef INET 3777 case AF_INET: 3778 { 3779 struct sockaddr_in *sin; 3780 3781 sin = (struct sockaddr_in *)newaddr; 3782 if (sin->sin_addr.s_addr == 0) { 3783 /* Invalid address */ 3784 return (-1); 3785 } 3786 /* zero out the bzero area */ 3787 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3788 3789 /* assure len is set */ 3790 sin->sin_len = sizeof(struct sockaddr_in); 3791 if (set_scope) { 3792 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3793 stcb->asoc.scope.ipv4_local_scope = 1; 3794 #else 3795 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3796 stcb->asoc.scope.ipv4_local_scope = 1; 3797 } 3798 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3799 } else { 3800 /* Validate the address is in scope */ 3801 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3802 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3803 addr_inscope = 0; 3804 } 3805 } 3806 break; 3807 } 3808 #endif 3809 #ifdef INET6 3810 case AF_INET6: 3811 { 3812 struct sockaddr_in6 *sin6; 3813 3814 sin6 = (struct sockaddr_in6 *)newaddr; 3815 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3816 /* Invalid address */ 3817 return (-1); 3818 } 3819 /* assure len is set */ 3820 sin6->sin6_len = sizeof(struct sockaddr_in6); 3821 if (set_scope) { 3822 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3823 stcb->asoc.scope.loopback_scope = 1; 3824 stcb->asoc.scope.local_scope = 0; 3825 stcb->asoc.scope.ipv4_local_scope = 1; 3826 stcb->asoc.scope.site_scope = 1; 3827 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3828 /* 3829 * If the new destination is a 3830 * LINK_LOCAL we must have common 3831 * site scope. Don't set the local 3832 * scope since we may not share all 3833 * links, only loopback can do this. 3834 * Links on the local network would 3835 * also be on our private network 3836 * for v4 too. 3837 */ 3838 stcb->asoc.scope.ipv4_local_scope = 1; 3839 stcb->asoc.scope.site_scope = 1; 3840 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3841 /* 3842 * If the new destination is 3843 * SITE_LOCAL then we must have site 3844 * scope in common. 3845 */ 3846 stcb->asoc.scope.site_scope = 1; 3847 } 3848 } else { 3849 /* Validate the address is in scope */ 3850 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3851 (stcb->asoc.scope.loopback_scope == 0)) { 3852 addr_inscope = 0; 3853 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3854 (stcb->asoc.scope.local_scope == 0)) { 3855 addr_inscope = 0; 3856 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3857 (stcb->asoc.scope.site_scope == 0)) { 3858 addr_inscope = 0; 3859 } 3860 } 3861 break; 3862 } 3863 #endif 3864 default: 3865 /* not supported family type */ 3866 return (-1); 3867 } 3868 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3869 if (net == NULL) { 3870 return (-1); 3871 } 3872 SCTP_INCR_RADDR_COUNT(); 3873 bzero(net, sizeof(struct sctp_nets)); 3874 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3875 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3876 switch (newaddr->sa_family) { 3877 #ifdef INET 3878 case AF_INET: 3879 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3880 break; 3881 #endif 3882 #ifdef INET6 3883 case AF_INET6: 3884 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3885 break; 3886 #endif 3887 default: 3888 break; 3889 } 3890 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3891 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3892 stcb->asoc.scope.loopback_scope = 1; 3893 stcb->asoc.scope.ipv4_local_scope = 1; 3894 stcb->asoc.scope.local_scope = 0; 3895 stcb->asoc.scope.site_scope = 1; 3896 addr_inscope = 1; 3897 } 3898 net->failure_threshold = stcb->asoc.def_net_failure; 3899 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3900 if (addr_inscope == 0) { 3901 net->dest_state = (SCTP_ADDR_REACHABLE | 3902 SCTP_ADDR_OUT_OF_SCOPE); 3903 } else { 3904 if (from == SCTP_ADDR_IS_CONFIRMED) 3905 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3906 net->dest_state = SCTP_ADDR_REACHABLE; 3907 else 3908 net->dest_state = SCTP_ADDR_REACHABLE | 3909 SCTP_ADDR_UNCONFIRMED; 3910 } 3911 /* 3912 * We set this to 0, the timer code knows that this means its an 3913 * initial value 3914 */ 3915 net->rto_needed = 1; 3916 net->RTO = 0; 3917 net->RTO_measured = 0; 3918 stcb->asoc.numnets++; 3919 net->ref_count = 1; 3920 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3921 net->port = stcb->asoc.port; 3922 net->dscp = stcb->asoc.default_dscp; 3923 #ifdef INET6 3924 net->flowlabel = stcb->asoc.default_flowlabel; 3925 #endif 3926 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3927 net->dest_state |= SCTP_ADDR_NOHB; 3928 } else { 3929 net->dest_state &= ~SCTP_ADDR_NOHB; 3930 } 3931 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3932 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3933 } else { 3934 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3935 } 3936 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3937 /* Init the timer structure */ 3938 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3939 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3940 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3941 3942 /* Now generate a route for this guy */ 3943 #ifdef INET6 3944 /* KAME hack: embed scopeid */ 3945 if (newaddr->sa_family == AF_INET6) { 3946 struct sockaddr_in6 *sin6; 3947 3948 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3949 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3950 sin6->sin6_scope_id = 0; 3951 } 3952 #endif 3953 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3954 3955 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3956 /* Get source address */ 3957 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3958 stcb, 3959 (sctp_route_t *) & net->ro, 3960 net, 3961 0, 3962 stcb->asoc.vrf_id); 3963 if (net->ro._s_addr != NULL) { 3964 net->src_addr_selected = 1; 3965 /* Now get the interface MTU */ 3966 if (net->ro._s_addr->ifn_p != NULL) { 3967 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3968 } 3969 } else { 3970 net->src_addr_selected = 0; 3971 } 3972 if (net->mtu > 0) { 3973 uint32_t rmtu; 3974 3975 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3976 if (rmtu == 0) { 3977 /* 3978 * Start things off to match mtu of 3979 * interface please. 3980 */ 3981 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3982 net->ro.ro_rt, net->mtu); 3983 } else { 3984 /* 3985 * we take the route mtu over the interface, 3986 * since the route may be leading out the 3987 * loopback, or a different interface. 3988 */ 3989 net->mtu = rmtu; 3990 } 3991 } 3992 } else { 3993 net->src_addr_selected = 0; 3994 } 3995 if (net->mtu == 0) { 3996 switch (newaddr->sa_family) { 3997 #ifdef INET 3998 case AF_INET: 3999 net->mtu = SCTP_DEFAULT_MTU; 4000 break; 4001 #endif 4002 #ifdef INET6 4003 case AF_INET6: 4004 net->mtu = 1280; 4005 break; 4006 #endif 4007 default: 4008 break; 4009 } 4010 } 4011 #if defined(INET) || defined(INET6) 4012 if (net->port) { 4013 net->mtu -= (uint32_t) sizeof(struct udphdr); 4014 } 4015 #endif 4016 if (from == SCTP_ALLOC_ASOC) { 4017 stcb->asoc.smallest_mtu = net->mtu; 4018 } 4019 if (stcb->asoc.smallest_mtu > net->mtu) { 4020 stcb->asoc.smallest_mtu = net->mtu; 4021 } 4022 #ifdef INET6 4023 if (newaddr->sa_family == AF_INET6) { 4024 struct sockaddr_in6 *sin6; 4025 4026 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4027 (void)sa6_recoverscope(sin6); 4028 } 4029 #endif 4030 4031 /* JRS - Use the congestion control given in the CC module */ 4032 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4033 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4034 4035 /* 4036 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4037 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4038 */ 4039 net->find_pseudo_cumack = 1; 4040 net->find_rtx_pseudo_cumack = 1; 4041 /* Choose an initial flowid. */ 4042 net->flowid = stcb->asoc.my_vtag ^ 4043 ntohs(stcb->rport) ^ 4044 ntohs(stcb->sctp_ep->sctp_lport); 4045 net->flowtype = M_HASHTYPE_OPAQUE; 4046 if (netp) { 4047 *netp = net; 4048 } 4049 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4050 if (net->ro.ro_rt == NULL) { 4051 /* Since we have no route put it at the back */ 4052 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4053 } else if (netfirst == NULL) { 4054 /* We are the first one in the pool. */ 4055 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4056 } else if (netfirst->ro.ro_rt == NULL) { 4057 /* 4058 * First one has NO route. Place this one ahead of the first 4059 * one. 4060 */ 4061 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4062 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4063 /* 4064 * This one has a different interface than the one at the 4065 * top of the list. Place it ahead. 4066 */ 4067 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4068 } else { 4069 /* 4070 * Ok we have the same interface as the first one. Move 4071 * forward until we find either a) one with a NULL route... 4072 * insert ahead of that b) one with a different ifp.. insert 4073 * after that. c) end of the list.. insert at the tail. 4074 */ 4075 struct sctp_nets *netlook; 4076 4077 do { 4078 netlook = TAILQ_NEXT(netfirst, sctp_next); 4079 if (netlook == NULL) { 4080 /* End of the list */ 4081 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4082 break; 4083 } else if (netlook->ro.ro_rt == NULL) { 4084 /* next one has NO route */ 4085 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4086 break; 4087 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4088 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4089 net, sctp_next); 4090 break; 4091 } 4092 /* Shift forward */ 4093 netfirst = netlook; 4094 } while (netlook != NULL); 4095 } 4096 4097 /* got to have a primary set */ 4098 if (stcb->asoc.primary_destination == 0) { 4099 stcb->asoc.primary_destination = net; 4100 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4101 (net->ro.ro_rt) && 4102 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4103 /* No route to current primary adopt new primary */ 4104 stcb->asoc.primary_destination = net; 4105 } 4106 /* Validate primary is first */ 4107 net = TAILQ_FIRST(&stcb->asoc.nets); 4108 if ((net != stcb->asoc.primary_destination) && 4109 (stcb->asoc.primary_destination)) { 4110 /* 4111 * first one on the list is NOT the primary sctp_cmpaddr() 4112 * is much more efficient if the primary is the first on the 4113 * list, make it so. 4114 */ 4115 TAILQ_REMOVE(&stcb->asoc.nets, 4116 stcb->asoc.primary_destination, sctp_next); 4117 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4118 stcb->asoc.primary_destination, sctp_next); 4119 } 4120 return (0); 4121 } 4122 4123 4124 static uint32_t 4125 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4126 { 4127 uint32_t id; 4128 struct sctpasochead *head; 4129 struct sctp_tcb *lstcb; 4130 4131 SCTP_INP_WLOCK(inp); 4132 try_again: 4133 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4134 /* TSNH */ 4135 SCTP_INP_WUNLOCK(inp); 4136 return (0); 4137 } 4138 /* 4139 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4140 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4141 */ 4142 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4143 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4144 } 4145 id = inp->sctp_associd_counter; 4146 inp->sctp_associd_counter++; 4147 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4148 if (lstcb) { 4149 goto try_again; 4150 } 4151 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4152 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4153 stcb->asoc.in_asocid_hash = 1; 4154 SCTP_INP_WUNLOCK(inp); 4155 return id; 4156 } 4157 4158 /* 4159 * allocate an association and add it to the endpoint. The caller must be 4160 * careful to add all additional addresses once they are know right away or 4161 * else the assoc will be may experience a blackout scenario. 4162 */ 4163 struct sctp_tcb * 4164 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4165 int *error, uint32_t override_tag, uint32_t vrf_id, 4166 struct thread *p 4167 ) 4168 { 4169 /* note the p argument is only valid in unbound sockets */ 4170 4171 struct sctp_tcb *stcb; 4172 struct sctp_association *asoc; 4173 struct sctpasochead *head; 4174 uint16_t rport; 4175 int err; 4176 4177 /* 4178 * Assumption made here: Caller has done a 4179 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4180 * address does not exist already. 4181 */ 4182 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4183 /* Hit max assoc, sorry no more */ 4184 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4185 *error = ENOBUFS; 4186 return (NULL); 4187 } 4188 if (firstaddr == NULL) { 4189 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4190 *error = EINVAL; 4191 return (NULL); 4192 } 4193 SCTP_INP_RLOCK(inp); 4194 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4195 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4196 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4197 /* 4198 * If its in the TCP pool, its NOT allowed to create an 4199 * association. The parent listener needs to call 4200 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4201 * off, or connected one does this.. its an error. 4202 */ 4203 SCTP_INP_RUNLOCK(inp); 4204 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4205 *error = EINVAL; 4206 return (NULL); 4207 } 4208 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4209 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4210 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4211 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4212 SCTP_INP_RUNLOCK(inp); 4213 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4214 *error = EINVAL; 4215 return (NULL); 4216 } 4217 } 4218 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4219 #ifdef SCTP_DEBUG 4220 if (firstaddr) { 4221 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4222 switch (firstaddr->sa_family) { 4223 #ifdef INET 4224 case AF_INET: 4225 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4226 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4227 break; 4228 #endif 4229 #ifdef INET6 4230 case AF_INET6: 4231 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4232 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4233 break; 4234 #endif 4235 default: 4236 break; 4237 } 4238 } else { 4239 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4240 } 4241 #endif /* SCTP_DEBUG */ 4242 switch (firstaddr->sa_family) { 4243 #ifdef INET 4244 case AF_INET: 4245 { 4246 struct sockaddr_in *sin; 4247 4248 sin = (struct sockaddr_in *)firstaddr; 4249 if ((ntohs(sin->sin_port) == 0) || 4250 (sin->sin_addr.s_addr == INADDR_ANY) || 4251 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4252 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4253 /* Invalid address */ 4254 SCTP_INP_RUNLOCK(inp); 4255 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4256 *error = EINVAL; 4257 return (NULL); 4258 } 4259 rport = sin->sin_port; 4260 break; 4261 } 4262 #endif 4263 #ifdef INET6 4264 case AF_INET6: 4265 { 4266 struct sockaddr_in6 *sin6; 4267 4268 sin6 = (struct sockaddr_in6 *)firstaddr; 4269 if ((ntohs(sin6->sin6_port) == 0) || 4270 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4271 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4272 /* Invalid address */ 4273 SCTP_INP_RUNLOCK(inp); 4274 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4275 *error = EINVAL; 4276 return (NULL); 4277 } 4278 rport = sin6->sin6_port; 4279 break; 4280 } 4281 #endif 4282 default: 4283 /* not supported family type */ 4284 SCTP_INP_RUNLOCK(inp); 4285 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4286 *error = EINVAL; 4287 return (NULL); 4288 } 4289 SCTP_INP_RUNLOCK(inp); 4290 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4291 /* 4292 * If you have not performed a bind, then we need to do the 4293 * ephemeral bind for you. 4294 */ 4295 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4296 (struct sockaddr *)NULL, 4297 (struct sctp_ifa *)NULL, 4298 p 4299 ))) { 4300 /* bind error, probably perm */ 4301 *error = err; 4302 return (NULL); 4303 } 4304 } 4305 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4306 if (stcb == NULL) { 4307 /* out of memory? */ 4308 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4309 *error = ENOMEM; 4310 return (NULL); 4311 } 4312 SCTP_INCR_ASOC_COUNT(); 4313 4314 bzero(stcb, sizeof(*stcb)); 4315 asoc = &stcb->asoc; 4316 4317 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4318 SCTP_TCB_LOCK_INIT(stcb); 4319 SCTP_TCB_SEND_LOCK_INIT(stcb); 4320 stcb->rport = rport; 4321 /* setup back pointer's */ 4322 stcb->sctp_ep = inp; 4323 stcb->sctp_socket = inp->sctp_socket; 4324 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4325 /* failed */ 4326 SCTP_TCB_LOCK_DESTROY(stcb); 4327 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4328 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4329 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4330 SCTP_DECR_ASOC_COUNT(); 4331 *error = err; 4332 return (NULL); 4333 } 4334 /* and the port */ 4335 SCTP_INP_INFO_WLOCK(); 4336 SCTP_INP_WLOCK(inp); 4337 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4338 /* inpcb freed while alloc going on */ 4339 SCTP_TCB_LOCK_DESTROY(stcb); 4340 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4341 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4342 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4343 SCTP_INP_WUNLOCK(inp); 4344 SCTP_INP_INFO_WUNLOCK(); 4345 SCTP_DECR_ASOC_COUNT(); 4346 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4347 *error = EINVAL; 4348 return (NULL); 4349 } 4350 SCTP_TCB_LOCK(stcb); 4351 4352 /* now that my_vtag is set, add it to the hash */ 4353 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4354 /* put it in the bucket in the vtag hash of assoc's for the system */ 4355 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4356 SCTP_INP_INFO_WUNLOCK(); 4357 4358 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4359 /* failure.. memory error? */ 4360 if (asoc->strmout) { 4361 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4362 asoc->strmout = NULL; 4363 } 4364 if (asoc->mapping_array) { 4365 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4366 asoc->mapping_array = NULL; 4367 } 4368 if (asoc->nr_mapping_array) { 4369 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4370 asoc->nr_mapping_array = NULL; 4371 } 4372 SCTP_DECR_ASOC_COUNT(); 4373 SCTP_TCB_UNLOCK(stcb); 4374 SCTP_TCB_LOCK_DESTROY(stcb); 4375 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4376 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4377 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4378 SCTP_INP_WUNLOCK(inp); 4379 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4380 *error = ENOBUFS; 4381 return (NULL); 4382 } 4383 /* Init all the timers */ 4384 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4385 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4386 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4387 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4388 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4389 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4390 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4391 4392 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4393 /* now file the port under the hash as well */ 4394 if (inp->sctp_tcbhash != NULL) { 4395 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4396 inp->sctp_hashmark)]; 4397 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4398 } 4399 SCTP_INP_WUNLOCK(inp); 4400 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4401 return (stcb); 4402 } 4403 4404 4405 void 4406 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4407 { 4408 struct sctp_association *asoc; 4409 4410 asoc = &stcb->asoc; 4411 asoc->numnets--; 4412 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4413 if (net == asoc->primary_destination) { 4414 /* Reset primary */ 4415 struct sctp_nets *lnet; 4416 4417 lnet = TAILQ_FIRST(&asoc->nets); 4418 /* 4419 * Mobility adaptation Ideally, if deleted destination is 4420 * the primary, it becomes a fast retransmission trigger by 4421 * the subsequent SET PRIMARY. (by micchie) 4422 */ 4423 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4424 SCTP_MOBILITY_BASE) || 4425 sctp_is_mobility_feature_on(stcb->sctp_ep, 4426 SCTP_MOBILITY_FASTHANDOFF)) { 4427 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4428 if (asoc->deleted_primary != NULL) { 4429 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4430 goto out; 4431 } 4432 asoc->deleted_primary = net; 4433 atomic_add_int(&net->ref_count, 1); 4434 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4435 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4436 sctp_mobility_feature_on(stcb->sctp_ep, 4437 SCTP_MOBILITY_PRIM_DELETED); 4438 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4439 stcb->sctp_ep, stcb, NULL); 4440 } 4441 out: 4442 /* Try to find a confirmed primary */ 4443 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4444 } 4445 if (net == asoc->last_data_chunk_from) { 4446 /* Reset primary */ 4447 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4448 } 4449 if (net == asoc->last_control_chunk_from) { 4450 /* Clear net */ 4451 asoc->last_control_chunk_from = NULL; 4452 } 4453 if (net == stcb->asoc.alternate) { 4454 sctp_free_remote_addr(stcb->asoc.alternate); 4455 stcb->asoc.alternate = NULL; 4456 } 4457 sctp_free_remote_addr(net); 4458 } 4459 4460 /* 4461 * remove a remote endpoint address from an association, it will fail if the 4462 * address does not exist. 4463 */ 4464 int 4465 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4466 { 4467 /* 4468 * Here we need to remove a remote address. This is quite simple, we 4469 * first find it in the list of address for the association 4470 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4471 * on that item. Note we do not allow it to be removed if there are 4472 * no other addresses. 4473 */ 4474 struct sctp_association *asoc; 4475 struct sctp_nets *net, *nnet; 4476 4477 asoc = &stcb->asoc; 4478 4479 /* locate the address */ 4480 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4481 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4482 continue; 4483 } 4484 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4485 remaddr)) { 4486 /* we found the guy */ 4487 if (asoc->numnets < 2) { 4488 /* Must have at LEAST two remote addresses */ 4489 return (-1); 4490 } else { 4491 sctp_remove_net(stcb, net); 4492 return (0); 4493 } 4494 } 4495 } 4496 /* not found. */ 4497 return (-2); 4498 } 4499 4500 void 4501 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4502 { 4503 struct sctpvtaghead *chain; 4504 struct sctp_tagblock *twait_block; 4505 int found = 0; 4506 int i; 4507 4508 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4509 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4510 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4511 if ((twait_block->vtag_block[i].v_tag == tag) && 4512 (twait_block->vtag_block[i].lport == lport) && 4513 (twait_block->vtag_block[i].rport == rport)) { 4514 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4515 twait_block->vtag_block[i].v_tag = 0; 4516 twait_block->vtag_block[i].lport = 0; 4517 twait_block->vtag_block[i].rport = 0; 4518 found = 1; 4519 break; 4520 } 4521 } 4522 if (found) 4523 break; 4524 } 4525 } 4526 4527 int 4528 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4529 { 4530 struct sctpvtaghead *chain; 4531 struct sctp_tagblock *twait_block; 4532 int found = 0; 4533 int i; 4534 4535 SCTP_INP_INFO_WLOCK(); 4536 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4537 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4538 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4539 if ((twait_block->vtag_block[i].v_tag == tag) && 4540 (twait_block->vtag_block[i].lport == lport) && 4541 (twait_block->vtag_block[i].rport == rport)) { 4542 found = 1; 4543 break; 4544 } 4545 } 4546 if (found) 4547 break; 4548 } 4549 SCTP_INP_INFO_WUNLOCK(); 4550 return (found); 4551 } 4552 4553 4554 void 4555 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4556 { 4557 struct sctpvtaghead *chain; 4558 struct sctp_tagblock *twait_block; 4559 struct timeval now; 4560 int set, i; 4561 4562 if (time == 0) { 4563 /* Its disabled */ 4564 return; 4565 } 4566 (void)SCTP_GETTIME_TIMEVAL(&now); 4567 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4568 set = 0; 4569 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4570 /* Block(s) present, lets find space, and expire on the fly */ 4571 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4572 if ((twait_block->vtag_block[i].v_tag == 0) && 4573 !set) { 4574 twait_block->vtag_block[i].tv_sec_at_expire = 4575 now.tv_sec + time; 4576 twait_block->vtag_block[i].v_tag = tag; 4577 twait_block->vtag_block[i].lport = lport; 4578 twait_block->vtag_block[i].rport = rport; 4579 set = 1; 4580 } else if ((twait_block->vtag_block[i].v_tag) && 4581 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4582 /* Audit expires this guy */ 4583 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4584 twait_block->vtag_block[i].v_tag = 0; 4585 twait_block->vtag_block[i].lport = 0; 4586 twait_block->vtag_block[i].rport = 0; 4587 if (set == 0) { 4588 /* Reuse it for my new tag */ 4589 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4590 twait_block->vtag_block[i].v_tag = tag; 4591 twait_block->vtag_block[i].lport = lport; 4592 twait_block->vtag_block[i].rport = rport; 4593 set = 1; 4594 } 4595 } 4596 } 4597 if (set) { 4598 /* 4599 * We only do up to the block where we can place our 4600 * tag for audits 4601 */ 4602 break; 4603 } 4604 } 4605 /* Need to add a new block to chain */ 4606 if (!set) { 4607 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4608 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4609 if (twait_block == NULL) { 4610 #ifdef INVARIANTS 4611 panic("Can not alloc tagblock"); 4612 #endif 4613 return; 4614 } 4615 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4616 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4617 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4618 twait_block->vtag_block[0].v_tag = tag; 4619 twait_block->vtag_block[0].lport = lport; 4620 twait_block->vtag_block[0].rport = rport; 4621 } 4622 } 4623 4624 4625 4626 /*- 4627 * Free the association after un-hashing the remote port. This 4628 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4629 * expect that the input to this function IS a locked TCB. 4630 * It will return 0, if it did NOT destroy the association (instead 4631 * it unlocks it. It will return NON-zero if it either destroyed the 4632 * association OR the association is already destroyed. 4633 */ 4634 int 4635 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4636 { 4637 int i; 4638 struct sctp_association *asoc; 4639 struct sctp_nets *net, *nnet; 4640 struct sctp_laddr *laddr, *naddr; 4641 struct sctp_tmit_chunk *chk, *nchk; 4642 struct sctp_asconf_addr *aparam, *naparam; 4643 struct sctp_asconf_ack *aack, *naack; 4644 struct sctp_stream_reset_list *strrst, *nstrrst; 4645 struct sctp_queued_to_read *sq, *nsq; 4646 struct sctp_stream_queue_pending *sp, *nsp; 4647 sctp_sharedkey_t *shared_key, *nshared_key; 4648 struct socket *so; 4649 4650 /* first, lets purge the entry from the hash table. */ 4651 4652 #ifdef SCTP_LOG_CLOSING 4653 sctp_log_closing(inp, stcb, 6); 4654 #endif 4655 if (stcb->asoc.state == 0) { 4656 #ifdef SCTP_LOG_CLOSING 4657 sctp_log_closing(inp, NULL, 7); 4658 #endif 4659 /* there is no asoc, really TSNH :-0 */ 4660 return (1); 4661 } 4662 if (stcb->asoc.alternate) { 4663 sctp_free_remote_addr(stcb->asoc.alternate); 4664 stcb->asoc.alternate = NULL; 4665 } 4666 /* TEMP CODE */ 4667 if (stcb->freed_from_where == 0) { 4668 /* Only record the first place free happened from */ 4669 stcb->freed_from_where = from_location; 4670 } 4671 /* TEMP CODE */ 4672 4673 asoc = &stcb->asoc; 4674 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4675 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4676 /* nothing around */ 4677 so = NULL; 4678 else 4679 so = inp->sctp_socket; 4680 4681 /* 4682 * We used timer based freeing if a reader or writer is in the way. 4683 * So we first check if we are actually being called from a timer, 4684 * if so we abort early if a reader or writer is still in the way. 4685 */ 4686 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4687 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4688 /* 4689 * is it the timer driving us? if so are the reader/writers 4690 * gone? 4691 */ 4692 if (stcb->asoc.refcnt) { 4693 /* nope, reader or writer in the way */ 4694 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4695 /* no asoc destroyed */ 4696 SCTP_TCB_UNLOCK(stcb); 4697 #ifdef SCTP_LOG_CLOSING 4698 sctp_log_closing(inp, stcb, 8); 4699 #endif 4700 return (0); 4701 } 4702 } 4703 /* now clean up any other timers */ 4704 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4705 asoc->dack_timer.self = NULL; 4706 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4707 /*- 4708 * For stream reset we don't blast this unless 4709 * it is a str-reset timer, it might be the 4710 * free-asoc timer which we DON'T want to 4711 * disturb. 4712 */ 4713 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4714 asoc->strreset_timer.self = NULL; 4715 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4716 asoc->asconf_timer.self = NULL; 4717 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4718 asoc->autoclose_timer.self = NULL; 4719 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4720 asoc->shut_guard_timer.self = NULL; 4721 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4722 asoc->delayed_event_timer.self = NULL; 4723 /* Mobility adaptation */ 4724 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4725 asoc->delete_prim_timer.self = NULL; 4726 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4727 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4728 net->rxt_timer.self = NULL; 4729 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4730 net->pmtu_timer.self = NULL; 4731 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4732 net->hb_timer.self = NULL; 4733 } 4734 /* Now the read queue needs to be cleaned up (only once) */ 4735 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4736 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4737 SCTP_INP_READ_LOCK(inp); 4738 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4739 if (sq->stcb == stcb) { 4740 sq->do_not_ref_stcb = 1; 4741 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4742 /* 4743 * If there is no end, there never will be 4744 * now. 4745 */ 4746 if (sq->end_added == 0) { 4747 /* Held for PD-API clear that. */ 4748 sq->pdapi_aborted = 1; 4749 sq->held_length = 0; 4750 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4751 /* 4752 * Need to add a PD-API 4753 * aborted indication. 4754 * Setting the control_pdapi 4755 * assures that it will be 4756 * added right after this 4757 * msg. 4758 */ 4759 uint32_t strseq; 4760 4761 stcb->asoc.control_pdapi = sq; 4762 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4763 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4764 stcb, 4765 SCTP_PARTIAL_DELIVERY_ABORTED, 4766 (void *)&strseq, 4767 SCTP_SO_LOCKED); 4768 stcb->asoc.control_pdapi = NULL; 4769 } 4770 } 4771 /* Add an end to wake them */ 4772 sq->end_added = 1; 4773 } 4774 } 4775 SCTP_INP_READ_UNLOCK(inp); 4776 if (stcb->block_entry) { 4777 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4778 stcb->block_entry->error = ECONNRESET; 4779 stcb->block_entry = NULL; 4780 } 4781 } 4782 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4783 /* 4784 * Someone holds a reference OR the socket is unaccepted 4785 * yet. 4786 */ 4787 if ((stcb->asoc.refcnt) || 4788 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4789 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4790 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4791 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4792 } 4793 SCTP_TCB_UNLOCK(stcb); 4794 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4795 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4796 /* nothing around */ 4797 so = NULL; 4798 if (so) { 4799 /* Wake any reader/writers */ 4800 sctp_sorwakeup(inp, so); 4801 sctp_sowwakeup(inp, so); 4802 } 4803 #ifdef SCTP_LOG_CLOSING 4804 sctp_log_closing(inp, stcb, 9); 4805 #endif 4806 /* no asoc destroyed */ 4807 return (0); 4808 } 4809 #ifdef SCTP_LOG_CLOSING 4810 sctp_log_closing(inp, stcb, 10); 4811 #endif 4812 /* 4813 * When I reach here, no others want to kill the assoc yet.. and I 4814 * own the lock. Now its possible an abort comes in when I do the 4815 * lock exchange below to grab all the locks to do the final take 4816 * out. to prevent this we increment the count, which will start a 4817 * timer and blow out above thus assuring us that we hold exclusive 4818 * killing of the asoc. Note that after getting back the TCB lock we 4819 * will go ahead and increment the counter back up and stop any 4820 * timer a passing stranger may have started :-S 4821 */ 4822 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4823 atomic_add_int(&stcb->asoc.refcnt, 1); 4824 4825 SCTP_TCB_UNLOCK(stcb); 4826 SCTP_INP_INFO_WLOCK(); 4827 SCTP_INP_WLOCK(inp); 4828 SCTP_TCB_LOCK(stcb); 4829 } 4830 /* Double check the GONE flag */ 4831 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4832 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4833 /* nothing around */ 4834 so = NULL; 4835 4836 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4837 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4838 /* 4839 * For TCP type we need special handling when we are 4840 * connected. We also include the peel'ed off ones to. 4841 */ 4842 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4843 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4844 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4845 if (so) { 4846 SOCK_LOCK(so); 4847 if (so->so_rcv.sb_cc == 0) { 4848 so->so_state &= ~(SS_ISCONNECTING | 4849 SS_ISDISCONNECTING | 4850 SS_ISCONFIRMING | 4851 SS_ISCONNECTED); 4852 } 4853 socantrcvmore_locked(so); 4854 sctp_sowwakeup(inp, so); 4855 sctp_sorwakeup(inp, so); 4856 SCTP_SOWAKEUP(so); 4857 } 4858 } 4859 } 4860 /* 4861 * Make it invalid too, that way if its about to run it will abort 4862 * and return. 4863 */ 4864 /* re-increment the lock */ 4865 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4866 atomic_add_int(&stcb->asoc.refcnt, -1); 4867 } 4868 if (stcb->asoc.refcnt) { 4869 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4870 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4871 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4872 SCTP_INP_INFO_WUNLOCK(); 4873 SCTP_INP_WUNLOCK(inp); 4874 } 4875 SCTP_TCB_UNLOCK(stcb); 4876 return (0); 4877 } 4878 asoc->state = 0; 4879 if (inp->sctp_tcbhash) { 4880 LIST_REMOVE(stcb, sctp_tcbhash); 4881 } 4882 if (stcb->asoc.in_asocid_hash) { 4883 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4884 } 4885 /* Now lets remove it from the list of ALL associations in the EP */ 4886 LIST_REMOVE(stcb, sctp_tcblist); 4887 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4888 SCTP_INP_INCR_REF(inp); 4889 SCTP_INP_WUNLOCK(inp); 4890 } 4891 /* pull from vtag hash */ 4892 LIST_REMOVE(stcb, sctp_asocs); 4893 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4894 inp->sctp_lport, stcb->rport); 4895 4896 /* 4897 * Now restop the timers to be sure this is paranoia at is finest! 4898 */ 4899 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4900 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4901 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4902 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4903 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4904 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4905 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4906 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4907 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4908 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4909 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4910 } 4911 4912 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4913 /* 4914 * The chunk lists and such SHOULD be empty but we check them just 4915 * in case. 4916 */ 4917 /* anything on the wheel needs to be removed */ 4918 for (i = 0; i < asoc->streamoutcnt; i++) { 4919 struct sctp_stream_out *outs; 4920 4921 outs = &asoc->strmout[i]; 4922 /* now clean up any chunks here */ 4923 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4924 TAILQ_REMOVE(&outs->outqueue, sp, next); 4925 sctp_free_spbufspace(stcb, asoc, sp); 4926 if (sp->data) { 4927 if (so) { 4928 /* Still an open socket - report */ 4929 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4930 0, (void *)sp, SCTP_SO_LOCKED); 4931 } 4932 if (sp->data) { 4933 sctp_m_freem(sp->data); 4934 sp->data = NULL; 4935 sp->tail_mbuf = NULL; 4936 sp->length = 0; 4937 } 4938 } 4939 if (sp->net) { 4940 sctp_free_remote_addr(sp->net); 4941 sp->net = NULL; 4942 } 4943 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4944 } 4945 } 4946 /* sa_ignore FREED_MEMORY */ 4947 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4948 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4949 SCTP_FREE(strrst, SCTP_M_STRESET); 4950 } 4951 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4952 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4953 if (sq->data) { 4954 sctp_m_freem(sq->data); 4955 sq->data = NULL; 4956 } 4957 sctp_free_remote_addr(sq->whoFrom); 4958 sq->whoFrom = NULL; 4959 sq->stcb = NULL; 4960 /* Free the ctl entry */ 4961 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4962 SCTP_DECR_READQ_COUNT(); 4963 /* sa_ignore FREED_MEMORY */ 4964 } 4965 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4966 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4967 if (chk->data) { 4968 sctp_m_freem(chk->data); 4969 chk->data = NULL; 4970 } 4971 if (chk->holds_key_ref) 4972 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4973 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4974 SCTP_DECR_CHK_COUNT(); 4975 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4976 asoc->free_chunk_cnt--; 4977 /* sa_ignore FREED_MEMORY */ 4978 } 4979 /* pending send queue SHOULD be empty */ 4980 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4981 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4982 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4983 #ifdef INVARIANTS 4984 } else { 4985 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4986 #endif 4987 } 4988 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4989 if (chk->data) { 4990 if (so) { 4991 /* Still a socket? */ 4992 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4993 0, chk, SCTP_SO_LOCKED); 4994 } 4995 if (chk->data) { 4996 sctp_m_freem(chk->data); 4997 chk->data = NULL; 4998 } 4999 } 5000 if (chk->holds_key_ref) 5001 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5002 if (chk->whoTo) { 5003 sctp_free_remote_addr(chk->whoTo); 5004 chk->whoTo = NULL; 5005 } 5006 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5007 SCTP_DECR_CHK_COUNT(); 5008 /* sa_ignore FREED_MEMORY */ 5009 } 5010 /* sent queue SHOULD be empty */ 5011 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5012 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5013 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5014 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5015 #ifdef INVARIANTS 5016 } else { 5017 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5018 #endif 5019 } 5020 } 5021 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5022 if (chk->data) { 5023 if (so) { 5024 /* Still a socket? */ 5025 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5026 0, chk, SCTP_SO_LOCKED); 5027 } 5028 if (chk->data) { 5029 sctp_m_freem(chk->data); 5030 chk->data = NULL; 5031 } 5032 } 5033 if (chk->holds_key_ref) 5034 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5035 sctp_free_remote_addr(chk->whoTo); 5036 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5037 SCTP_DECR_CHK_COUNT(); 5038 /* sa_ignore FREED_MEMORY */ 5039 } 5040 #ifdef INVARIANTS 5041 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5042 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5043 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5044 } 5045 } 5046 #endif 5047 /* control queue MAY not be empty */ 5048 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5049 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5050 if (chk->data) { 5051 sctp_m_freem(chk->data); 5052 chk->data = NULL; 5053 } 5054 if (chk->holds_key_ref) 5055 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5056 sctp_free_remote_addr(chk->whoTo); 5057 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5058 SCTP_DECR_CHK_COUNT(); 5059 /* sa_ignore FREED_MEMORY */ 5060 } 5061 /* ASCONF queue MAY not be empty */ 5062 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5063 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5064 if (chk->data) { 5065 sctp_m_freem(chk->data); 5066 chk->data = NULL; 5067 } 5068 if (chk->holds_key_ref) 5069 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5070 sctp_free_remote_addr(chk->whoTo); 5071 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5072 SCTP_DECR_CHK_COUNT(); 5073 /* sa_ignore FREED_MEMORY */ 5074 } 5075 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5076 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5077 if (chk->data) { 5078 sctp_m_freem(chk->data); 5079 chk->data = NULL; 5080 } 5081 if (chk->holds_key_ref) 5082 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5083 sctp_free_remote_addr(chk->whoTo); 5084 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5085 SCTP_DECR_CHK_COUNT(); 5086 /* sa_ignore FREED_MEMORY */ 5087 } 5088 5089 if (asoc->mapping_array) { 5090 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5091 asoc->mapping_array = NULL; 5092 } 5093 if (asoc->nr_mapping_array) { 5094 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5095 asoc->nr_mapping_array = NULL; 5096 } 5097 /* the stream outs */ 5098 if (asoc->strmout) { 5099 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5100 asoc->strmout = NULL; 5101 } 5102 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5103 if (asoc->strmin) { 5104 struct sctp_queued_to_read *ctl, *nctl; 5105 5106 for (i = 0; i < asoc->streamincnt; i++) { 5107 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5108 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5109 sctp_free_remote_addr(ctl->whoFrom); 5110 if (ctl->data) { 5111 sctp_m_freem(ctl->data); 5112 ctl->data = NULL; 5113 } 5114 /* 5115 * We don't free the address here since all 5116 * the net's were freed above. 5117 */ 5118 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5119 SCTP_DECR_READQ_COUNT(); 5120 } 5121 } 5122 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5123 asoc->strmin = NULL; 5124 } 5125 asoc->streamincnt = 0; 5126 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5127 #ifdef INVARIANTS 5128 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5129 panic("no net's left alloc'ed, or list points to itself"); 5130 } 5131 #endif 5132 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5133 sctp_free_remote_addr(net); 5134 } 5135 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5136 /* sa_ignore FREED_MEMORY */ 5137 sctp_remove_laddr(laddr); 5138 } 5139 5140 /* pending asconf (address) parameters */ 5141 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5142 /* sa_ignore FREED_MEMORY */ 5143 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5144 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5145 } 5146 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5147 /* sa_ignore FREED_MEMORY */ 5148 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5149 if (aack->data != NULL) { 5150 sctp_m_freem(aack->data); 5151 } 5152 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5153 } 5154 /* clean up auth stuff */ 5155 if (asoc->local_hmacs) 5156 sctp_free_hmaclist(asoc->local_hmacs); 5157 if (asoc->peer_hmacs) 5158 sctp_free_hmaclist(asoc->peer_hmacs); 5159 5160 if (asoc->local_auth_chunks) 5161 sctp_free_chunklist(asoc->local_auth_chunks); 5162 if (asoc->peer_auth_chunks) 5163 sctp_free_chunklist(asoc->peer_auth_chunks); 5164 5165 sctp_free_authinfo(&asoc->authinfo); 5166 5167 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5168 LIST_REMOVE(shared_key, next); 5169 sctp_free_sharedkey(shared_key); 5170 /* sa_ignore FREED_MEMORY */ 5171 } 5172 5173 /* Insert new items here :> */ 5174 5175 /* Get rid of LOCK */ 5176 SCTP_TCB_UNLOCK(stcb); 5177 SCTP_TCB_LOCK_DESTROY(stcb); 5178 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5179 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5180 SCTP_INP_INFO_WUNLOCK(); 5181 SCTP_INP_RLOCK(inp); 5182 } 5183 #ifdef SCTP_TRACK_FREED_ASOCS 5184 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5185 /* now clean up the tasoc itself */ 5186 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5187 SCTP_DECR_ASOC_COUNT(); 5188 } else { 5189 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5190 } 5191 #else 5192 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5193 SCTP_DECR_ASOC_COUNT(); 5194 #endif 5195 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5196 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5197 /* 5198 * If its NOT the inp_free calling us AND sctp_close 5199 * as been called, we call back... 5200 */ 5201 SCTP_INP_RUNLOCK(inp); 5202 /* 5203 * This will start the kill timer (if we are the 5204 * last one) since we hold an increment yet. But 5205 * this is the only safe way to do this since 5206 * otherwise if the socket closes at the same time 5207 * we are here we might collide in the cleanup. 5208 */ 5209 sctp_inpcb_free(inp, 5210 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5211 SCTP_CALLED_DIRECTLY_NOCMPSET); 5212 SCTP_INP_DECR_REF(inp); 5213 goto out_of; 5214 } else { 5215 /* The socket is still open. */ 5216 SCTP_INP_DECR_REF(inp); 5217 } 5218 } 5219 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5220 SCTP_INP_RUNLOCK(inp); 5221 } 5222 out_of: 5223 /* destroyed the asoc */ 5224 #ifdef SCTP_LOG_CLOSING 5225 sctp_log_closing(inp, NULL, 11); 5226 #endif 5227 return (1); 5228 } 5229 5230 5231 5232 /* 5233 * determine if a destination is "reachable" based upon the addresses bound 5234 * to the current endpoint (e.g. only v4 or v6 currently bound) 5235 */ 5236 /* 5237 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5238 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5239 * types bound as its endpoint 5240 */ 5241 int 5242 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5243 { 5244 struct sctp_inpcb *inp; 5245 int answer; 5246 5247 /* 5248 * No locks here, the TCB, in all cases is already locked and an 5249 * assoc is up. There is either a INP lock by the caller applied (in 5250 * asconf case when deleting an address) or NOT in the HB case, 5251 * however if HB then the INP increment is up and the INP will not 5252 * be removed (on top of the fact that we have a TCB lock). So we 5253 * only want to read the sctp_flags, which is either bound-all or 5254 * not.. no protection needed since once an assoc is up you can't be 5255 * changing your binding. 5256 */ 5257 inp = stcb->sctp_ep; 5258 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5259 /* if bound all, destination is not restricted */ 5260 /* 5261 * RRS: Question during lock work: Is this correct? If you 5262 * are bound-all you still might need to obey the V4--V6 5263 * flags??? IMO this bound-all stuff needs to be removed! 5264 */ 5265 return (1); 5266 } 5267 /* NOTE: all "scope" checks are done when local addresses are added */ 5268 switch (destaddr->sa_family) { 5269 #ifdef INET6 5270 case AF_INET6: 5271 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5272 break; 5273 #endif 5274 #ifdef INET 5275 case AF_INET: 5276 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5277 break; 5278 #endif 5279 default: 5280 /* invalid family, so it's unreachable */ 5281 answer = 0; 5282 break; 5283 } 5284 return (answer); 5285 } 5286 5287 /* 5288 * update the inp_vflags on an endpoint 5289 */ 5290 static void 5291 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5292 { 5293 struct sctp_laddr *laddr; 5294 5295 /* first clear the flag */ 5296 inp->ip_inp.inp.inp_vflag = 0; 5297 /* set the flag based on addresses on the ep list */ 5298 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5299 if (laddr->ifa == NULL) { 5300 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5301 __FUNCTION__); 5302 continue; 5303 } 5304 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5305 continue; 5306 } 5307 switch (laddr->ifa->address.sa.sa_family) { 5308 #ifdef INET6 5309 case AF_INET6: 5310 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5311 break; 5312 #endif 5313 #ifdef INET 5314 case AF_INET: 5315 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5316 break; 5317 #endif 5318 default: 5319 break; 5320 } 5321 } 5322 } 5323 5324 /* 5325 * Add the address to the endpoint local address list There is nothing to be 5326 * done if we are bound to all addresses 5327 */ 5328 void 5329 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5330 { 5331 struct sctp_laddr *laddr; 5332 int fnd, error = 0; 5333 5334 fnd = 0; 5335 5336 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5337 /* You are already bound to all. You have it already */ 5338 return; 5339 } 5340 #ifdef INET6 5341 if (ifa->address.sa.sa_family == AF_INET6) { 5342 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5343 /* Can't bind a non-useable addr. */ 5344 return; 5345 } 5346 } 5347 #endif 5348 /* first, is it already present? */ 5349 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5350 if (laddr->ifa == ifa) { 5351 fnd = 1; 5352 break; 5353 } 5354 } 5355 5356 if (fnd == 0) { 5357 /* Not in the ep list */ 5358 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5359 if (error != 0) 5360 return; 5361 inp->laddr_count++; 5362 /* update inp_vflag flags */ 5363 switch (ifa->address.sa.sa_family) { 5364 #ifdef INET6 5365 case AF_INET6: 5366 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5367 break; 5368 #endif 5369 #ifdef INET 5370 case AF_INET: 5371 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5372 break; 5373 #endif 5374 default: 5375 break; 5376 } 5377 } 5378 return; 5379 } 5380 5381 5382 /* 5383 * select a new (hopefully reachable) destination net (should only be used 5384 * when we deleted an ep addr that is the only usable source address to reach 5385 * the destination net) 5386 */ 5387 static void 5388 sctp_select_primary_destination(struct sctp_tcb *stcb) 5389 { 5390 struct sctp_nets *net; 5391 5392 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5393 /* for now, we'll just pick the first reachable one we find */ 5394 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5395 continue; 5396 if (sctp_destination_is_reachable(stcb, 5397 (struct sockaddr *)&net->ro._l_addr)) { 5398 /* found a reachable destination */ 5399 stcb->asoc.primary_destination = net; 5400 } 5401 } 5402 /* I can't there from here! ...we're gonna die shortly... */ 5403 } 5404 5405 5406 /* 5407 * Delete the address from the endpoint local address list There is nothing 5408 * to be done if we are bound to all addresses 5409 */ 5410 void 5411 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5412 { 5413 struct sctp_laddr *laddr; 5414 int fnd; 5415 5416 fnd = 0; 5417 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5418 /* You are already bound to all. You have it already */ 5419 return; 5420 } 5421 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5422 if (laddr->ifa == ifa) { 5423 fnd = 1; 5424 break; 5425 } 5426 } 5427 if (fnd && (inp->laddr_count < 2)) { 5428 /* can't delete unless there are at LEAST 2 addresses */ 5429 return; 5430 } 5431 if (fnd) { 5432 /* 5433 * clean up any use of this address go through our 5434 * associations and clear any last_used_address that match 5435 * this one for each assoc, see if a new primary_destination 5436 * is needed 5437 */ 5438 struct sctp_tcb *stcb; 5439 5440 /* clean up "next_addr_touse" */ 5441 if (inp->next_addr_touse == laddr) 5442 /* delete this address */ 5443 inp->next_addr_touse = NULL; 5444 5445 /* clean up "last_used_address" */ 5446 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5447 struct sctp_nets *net; 5448 5449 SCTP_TCB_LOCK(stcb); 5450 if (stcb->asoc.last_used_address == laddr) 5451 /* delete this address */ 5452 stcb->asoc.last_used_address = NULL; 5453 /* 5454 * Now spin through all the nets and purge any ref 5455 * to laddr 5456 */ 5457 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5458 if (net->ro._s_addr && 5459 (net->ro._s_addr->ifa == laddr->ifa)) { 5460 /* Yep, purge src address selected */ 5461 sctp_rtentry_t *rt; 5462 5463 /* delete this address if cached */ 5464 rt = net->ro.ro_rt; 5465 if (rt != NULL) { 5466 RTFREE(rt); 5467 net->ro.ro_rt = NULL; 5468 } 5469 sctp_free_ifa(net->ro._s_addr); 5470 net->ro._s_addr = NULL; 5471 net->src_addr_selected = 0; 5472 } 5473 } 5474 SCTP_TCB_UNLOCK(stcb); 5475 } /* for each tcb */ 5476 /* remove it from the ep list */ 5477 sctp_remove_laddr(laddr); 5478 inp->laddr_count--; 5479 /* update inp_vflag flags */ 5480 sctp_update_ep_vflag(inp); 5481 } 5482 return; 5483 } 5484 5485 /* 5486 * Add the address to the TCB local address restricted list. 5487 * This is a "pending" address list (eg. addresses waiting for an 5488 * ASCONF-ACK response) and cannot be used as a valid source address. 5489 */ 5490 void 5491 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5492 { 5493 struct sctp_laddr *laddr; 5494 struct sctpladdr *list; 5495 5496 /* 5497 * Assumes TCB is locked.. and possibly the INP. May need to 5498 * confirm/fix that if we need it and is not the case. 5499 */ 5500 list = &stcb->asoc.sctp_restricted_addrs; 5501 5502 #ifdef INET6 5503 if (ifa->address.sa.sa_family == AF_INET6) { 5504 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5505 /* Can't bind a non-existent addr. */ 5506 return; 5507 } 5508 } 5509 #endif 5510 /* does the address already exist? */ 5511 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5512 if (laddr->ifa == ifa) { 5513 return; 5514 } 5515 } 5516 5517 /* add to the list */ 5518 (void)sctp_insert_laddr(list, ifa, 0); 5519 return; 5520 } 5521 5522 /* 5523 * insert an laddr entry with the given ifa for the desired list 5524 */ 5525 int 5526 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5527 { 5528 struct sctp_laddr *laddr; 5529 5530 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5531 if (laddr == NULL) { 5532 /* out of memory? */ 5533 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5534 return (EINVAL); 5535 } 5536 SCTP_INCR_LADDR_COUNT(); 5537 bzero(laddr, sizeof(*laddr)); 5538 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5539 laddr->ifa = ifa; 5540 laddr->action = act; 5541 atomic_add_int(&ifa->refcount, 1); 5542 /* insert it */ 5543 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5544 5545 return (0); 5546 } 5547 5548 /* 5549 * Remove an laddr entry from the local address list (on an assoc) 5550 */ 5551 void 5552 sctp_remove_laddr(struct sctp_laddr *laddr) 5553 { 5554 5555 /* remove from the list */ 5556 LIST_REMOVE(laddr, sctp_nxt_addr); 5557 sctp_free_ifa(laddr->ifa); 5558 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5559 SCTP_DECR_LADDR_COUNT(); 5560 } 5561 5562 /* 5563 * Remove a local address from the TCB local address restricted list 5564 */ 5565 void 5566 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5567 { 5568 struct sctp_inpcb *inp; 5569 struct sctp_laddr *laddr; 5570 5571 /* 5572 * This is called by asconf work. It is assumed that a) The TCB is 5573 * locked and b) The INP is locked. This is true in as much as I can 5574 * trace through the entry asconf code where I did these locks. 5575 * Again, the ASCONF code is a bit different in that it does lock 5576 * the INP during its work often times. This must be since we don't 5577 * want other proc's looking up things while what they are looking 5578 * up is changing :-D 5579 */ 5580 5581 inp = stcb->sctp_ep; 5582 /* if subset bound and don't allow ASCONF's, can't delete last */ 5583 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5584 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5585 if (stcb->sctp_ep->laddr_count < 2) { 5586 /* can't delete last address */ 5587 return; 5588 } 5589 } 5590 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5591 /* remove the address if it exists */ 5592 if (laddr->ifa == NULL) 5593 continue; 5594 if (laddr->ifa == ifa) { 5595 sctp_remove_laddr(laddr); 5596 return; 5597 } 5598 } 5599 5600 /* address not found! */ 5601 return; 5602 } 5603 5604 /* 5605 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5606 */ 5607 /* sysctl */ 5608 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5609 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5610 5611 5612 5613 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5614 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5615 int *sctp_cpuarry = NULL; 5616 void 5617 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5618 { 5619 /* Queue a packet to a processor for the specified core */ 5620 struct sctp_mcore_queue *qent; 5621 struct sctp_mcore_ctrl *wkq; 5622 int need_wake = 0; 5623 5624 if (sctp_mcore_workers == NULL) { 5625 /* Something went way bad during setup */ 5626 sctp_input_with_port(m, off, 0); 5627 return; 5628 } 5629 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5630 (sizeof(struct sctp_mcore_queue)), 5631 SCTP_M_MCORE); 5632 if (qent == NULL) { 5633 /* This is trouble */ 5634 sctp_input_with_port(m, off, 0); 5635 return; 5636 } 5637 qent->vn = curvnet; 5638 qent->m = m; 5639 qent->off = off; 5640 qent->v6 = 0; 5641 wkq = &sctp_mcore_workers[cpu_to_use]; 5642 SCTP_MCORE_QLOCK(wkq); 5643 5644 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5645 if (wkq->running == 0) { 5646 need_wake = 1; 5647 } 5648 SCTP_MCORE_QUNLOCK(wkq); 5649 if (need_wake) { 5650 wakeup(&wkq->running); 5651 } 5652 } 5653 5654 static void 5655 sctp_mcore_thread(void *arg) 5656 { 5657 5658 struct sctp_mcore_ctrl *wkq; 5659 struct sctp_mcore_queue *qent; 5660 5661 wkq = (struct sctp_mcore_ctrl *)arg; 5662 struct mbuf *m; 5663 int off, v6; 5664 5665 /* Wait for first tickle */ 5666 SCTP_MCORE_LOCK(wkq); 5667 wkq->running = 0; 5668 msleep(&wkq->running, 5669 &wkq->core_mtx, 5670 0, "wait for pkt", 0); 5671 SCTP_MCORE_UNLOCK(wkq); 5672 5673 /* Bind to our cpu */ 5674 thread_lock(curthread); 5675 sched_bind(curthread, wkq->cpuid); 5676 thread_unlock(curthread); 5677 5678 /* Now lets start working */ 5679 SCTP_MCORE_LOCK(wkq); 5680 /* Now grab lock and go */ 5681 for (;;) { 5682 SCTP_MCORE_QLOCK(wkq); 5683 skip_sleep: 5684 wkq->running = 1; 5685 qent = TAILQ_FIRST(&wkq->que); 5686 if (qent) { 5687 TAILQ_REMOVE(&wkq->que, qent, next); 5688 SCTP_MCORE_QUNLOCK(wkq); 5689 CURVNET_SET(qent->vn); 5690 m = qent->m; 5691 off = qent->off; 5692 v6 = qent->v6; 5693 SCTP_FREE(qent, SCTP_M_MCORE); 5694 if (v6 == 0) { 5695 sctp_input_with_port(m, off, 0); 5696 } else { 5697 SCTP_PRINTF("V6 not yet supported\n"); 5698 sctp_m_freem(m); 5699 } 5700 CURVNET_RESTORE(); 5701 SCTP_MCORE_QLOCK(wkq); 5702 } 5703 wkq->running = 0; 5704 if (!TAILQ_EMPTY(&wkq->que)) { 5705 goto skip_sleep; 5706 } 5707 SCTP_MCORE_QUNLOCK(wkq); 5708 msleep(&wkq->running, 5709 &wkq->core_mtx, 5710 0, "wait for pkt", 0); 5711 } 5712 } 5713 5714 static void 5715 sctp_startup_mcore_threads(void) 5716 { 5717 int i, cpu; 5718 5719 if (mp_ncpus == 1) 5720 return; 5721 5722 if (sctp_mcore_workers != NULL) { 5723 /* 5724 * Already been here in some previous vnet? 5725 */ 5726 return; 5727 } 5728 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5729 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5730 SCTP_M_MCORE); 5731 if (sctp_mcore_workers == NULL) { 5732 /* TSNH I hope */ 5733 return; 5734 } 5735 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5736 sizeof(struct sctp_mcore_ctrl))); 5737 /* Init the structures */ 5738 for (i = 0; i <= mp_maxid; i++) { 5739 TAILQ_INIT(&sctp_mcore_workers[i].que); 5740 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5741 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5742 sctp_mcore_workers[i].cpuid = i; 5743 } 5744 if (sctp_cpuarry == NULL) { 5745 SCTP_MALLOC(sctp_cpuarry, int *, 5746 (mp_ncpus * sizeof(int)), 5747 SCTP_M_MCORE); 5748 i = 0; 5749 CPU_FOREACH(cpu) { 5750 sctp_cpuarry[i] = cpu; 5751 i++; 5752 } 5753 } 5754 /* Now start them all */ 5755 CPU_FOREACH(cpu) { 5756 (void)kproc_create(sctp_mcore_thread, 5757 (void *)&sctp_mcore_workers[cpu], 5758 &sctp_mcore_workers[cpu].thread_proc, 5759 RFPROC, 5760 SCTP_KTHREAD_PAGES, 5761 SCTP_MCORE_NAME); 5762 5763 } 5764 } 5765 5766 #endif 5767 5768 void 5769 sctp_pcb_init() 5770 { 5771 /* 5772 * SCTP initialization for the PCB structures should be called by 5773 * the sctp_init() funciton. 5774 */ 5775 int i; 5776 struct timeval tv; 5777 5778 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5779 /* error I was called twice */ 5780 return; 5781 } 5782 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5783 5784 #if defined(SCTP_LOCAL_TRACE_BUF) 5785 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5786 #endif 5787 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5788 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5789 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5790 SCTP_M_MCORE); 5791 #endif 5792 (void)SCTP_GETTIME_TIMEVAL(&tv); 5793 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5794 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5795 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5796 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5797 #else 5798 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5799 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5800 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5801 #endif 5802 /* init the empty list of (All) Endpoints */ 5803 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5804 5805 5806 /* init the hash table of endpoints */ 5807 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5808 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5809 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5810 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5811 &SCTP_BASE_INFO(hashasocmark)); 5812 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5813 &SCTP_BASE_INFO(hashmark)); 5814 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5815 &SCTP_BASE_INFO(hashtcpmark)); 5816 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5817 5818 5819 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5820 &SCTP_BASE_INFO(hashvrfmark)); 5821 5822 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5823 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5824 /* init the zones */ 5825 /* 5826 * FIX ME: Should check for NULL returns, but if it does fail we are 5827 * doomed to panic anyways... add later maybe. 5828 */ 5829 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5830 sizeof(struct sctp_inpcb), maxsockets); 5831 5832 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5833 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5834 5835 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5836 sizeof(struct sctp_laddr), 5837 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5838 5839 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5840 sizeof(struct sctp_nets), 5841 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5842 5843 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5844 sizeof(struct sctp_tmit_chunk), 5845 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5846 5847 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5848 sizeof(struct sctp_queued_to_read), 5849 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5850 5851 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5852 sizeof(struct sctp_stream_queue_pending), 5853 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5854 5855 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5856 sizeof(struct sctp_asconf), 5857 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5858 5859 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5860 sizeof(struct sctp_asconf_ack), 5861 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5862 5863 5864 /* Master Lock INIT for info structure */ 5865 SCTP_INP_INFO_LOCK_INIT(); 5866 SCTP_STATLOG_INIT_LOCK(); 5867 5868 SCTP_IPI_COUNT_INIT(); 5869 SCTP_IPI_ADDR_INIT(); 5870 #ifdef SCTP_PACKET_LOGGING 5871 SCTP_IP_PKTLOG_INIT(); 5872 #endif 5873 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5874 5875 SCTP_WQ_ADDR_INIT(); 5876 /* not sure if we need all the counts */ 5877 SCTP_BASE_INFO(ipi_count_ep) = 0; 5878 /* assoc/tcb zone info */ 5879 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5880 /* local addrlist zone info */ 5881 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5882 /* remote addrlist zone info */ 5883 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5884 /* chunk info */ 5885 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5886 5887 /* socket queue zone info */ 5888 SCTP_BASE_INFO(ipi_count_readq) = 0; 5889 5890 /* stream out queue cont */ 5891 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5892 5893 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5894 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5895 5896 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5897 5898 /* Init the TIMEWAIT list */ 5899 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5900 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5901 } 5902 sctp_startup_iterator(); 5903 5904 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5905 sctp_startup_mcore_threads(); 5906 #endif 5907 5908 /* 5909 * INIT the default VRF which for BSD is the only one, other O/S's 5910 * may have more. But initially they must start with one and then 5911 * add the VRF's as addresses are added. 5912 */ 5913 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5914 } 5915 5916 /* 5917 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5918 */ 5919 void 5920 sctp_pcb_finish(void) 5921 { 5922 struct sctp_vrflist *vrf_bucket; 5923 struct sctp_vrf *vrf, *nvrf; 5924 struct sctp_ifn *ifn, *nifn; 5925 struct sctp_ifa *ifa, *nifa; 5926 struct sctpvtaghead *chain; 5927 struct sctp_tagblock *twait_block, *prev_twait_block; 5928 struct sctp_laddr *wi, *nwi; 5929 int i; 5930 struct sctp_iterator *it, *nit; 5931 5932 /* 5933 * In FreeBSD the iterator thread never exits but we do clean up. 5934 * The only way FreeBSD reaches here is if we have VRF's but we 5935 * still add the ifdef to make it compile on old versions. 5936 */ 5937 SCTP_IPI_ITERATOR_WQ_LOCK(); 5938 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5939 if (it->vn != curvnet) { 5940 continue; 5941 } 5942 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5943 if (it->function_atend != NULL) { 5944 (*it->function_atend) (it->pointer, it->val); 5945 } 5946 SCTP_FREE(it, SCTP_M_ITER); 5947 } 5948 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5949 SCTP_ITERATOR_LOCK(); 5950 if ((sctp_it_ctl.cur_it) && 5951 (sctp_it_ctl.cur_it->vn == curvnet)) { 5952 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5953 } 5954 SCTP_ITERATOR_UNLOCK(); 5955 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5956 SCTP_WQ_ADDR_LOCK(); 5957 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5958 LIST_REMOVE(wi, sctp_nxt_addr); 5959 SCTP_DECR_LADDR_COUNT(); 5960 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5961 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5962 } 5963 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5964 } 5965 SCTP_WQ_ADDR_UNLOCK(); 5966 5967 /* 5968 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5969 * destroyed first). 5970 */ 5971 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5972 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5973 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5974 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5975 /* free the ifa */ 5976 LIST_REMOVE(ifa, next_bucket); 5977 LIST_REMOVE(ifa, next_ifa); 5978 SCTP_FREE(ifa, SCTP_M_IFA); 5979 } 5980 /* free the ifn */ 5981 LIST_REMOVE(ifn, next_bucket); 5982 LIST_REMOVE(ifn, next_ifn); 5983 SCTP_FREE(ifn, SCTP_M_IFN); 5984 } 5985 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5986 /* free the vrf */ 5987 LIST_REMOVE(vrf, next_vrf); 5988 SCTP_FREE(vrf, SCTP_M_VRF); 5989 } 5990 /* free the vrf hashes */ 5991 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5992 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5993 5994 /* 5995 * free the TIMEWAIT list elements malloc'd in the function 5996 * sctp_add_vtag_to_timewait()... 5997 */ 5998 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5999 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6000 if (!LIST_EMPTY(chain)) { 6001 prev_twait_block = NULL; 6002 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6003 if (prev_twait_block) { 6004 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6005 } 6006 prev_twait_block = twait_block; 6007 } 6008 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6009 } 6010 } 6011 6012 /* free the locks and mutexes */ 6013 #ifdef SCTP_PACKET_LOGGING 6014 SCTP_IP_PKTLOG_DESTROY(); 6015 #endif 6016 SCTP_IPI_ADDR_DESTROY(); 6017 SCTP_STATLOG_DESTROY(); 6018 SCTP_INP_INFO_LOCK_DESTROY(); 6019 6020 SCTP_WQ_ADDR_DESTROY(); 6021 6022 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6023 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6024 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6025 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6026 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6027 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6028 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6029 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6030 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6031 /* Get rid of other stuff to */ 6032 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6033 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6034 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6035 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6036 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6037 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6038 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6039 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6040 #endif 6041 } 6042 6043 6044 int 6045 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6046 int offset, int limit, 6047 struct sockaddr *src, struct sockaddr *dst, 6048 struct sockaddr *altsa) 6049 { 6050 /* 6051 * grub through the INIT pulling addresses and loading them to the 6052 * nets structure in the asoc. The from address in the mbuf should 6053 * also be loaded (if it is not already). This routine can be called 6054 * with either INIT or INIT-ACK's as long as the m points to the IP 6055 * packet and the offset points to the beginning of the parameters. 6056 */ 6057 struct sctp_inpcb *inp; 6058 struct sctp_nets *net, *nnet, *net_tmp; 6059 struct sctp_paramhdr *phdr, parm_buf; 6060 struct sctp_tcb *stcb_tmp; 6061 uint16_t ptype, plen; 6062 struct sockaddr *sa; 6063 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6064 struct sctp_auth_random *p_random = NULL; 6065 uint16_t random_len = 0; 6066 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6067 struct sctp_auth_hmac_algo *hmacs = NULL; 6068 uint16_t hmacs_len = 0; 6069 uint8_t saw_asconf = 0; 6070 uint8_t saw_asconf_ack = 0; 6071 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6072 struct sctp_auth_chunk_list *chunks = NULL; 6073 uint16_t num_chunks = 0; 6074 sctp_key_t *new_key; 6075 uint32_t keylen; 6076 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6077 uint8_t peer_supports_ecn; 6078 uint8_t peer_supports_prsctp; 6079 uint8_t peer_supports_auth; 6080 uint8_t peer_supports_asconf; 6081 uint8_t peer_supports_asconf_ack; 6082 uint8_t peer_supports_reconfig; 6083 uint8_t peer_supports_nrsack; 6084 uint8_t peer_supports_pktdrop; 6085 6086 #ifdef INET 6087 struct sockaddr_in sin; 6088 6089 #endif 6090 #ifdef INET6 6091 struct sockaddr_in6 sin6; 6092 6093 #endif 6094 6095 /* First get the destination address setup too. */ 6096 #ifdef INET 6097 memset(&sin, 0, sizeof(sin)); 6098 sin.sin_family = AF_INET; 6099 sin.sin_len = sizeof(sin); 6100 sin.sin_port = stcb->rport; 6101 #endif 6102 #ifdef INET6 6103 memset(&sin6, 0, sizeof(sin6)); 6104 sin6.sin6_family = AF_INET6; 6105 sin6.sin6_len = sizeof(struct sockaddr_in6); 6106 sin6.sin6_port = stcb->rport; 6107 #endif 6108 if (altsa) { 6109 sa = altsa; 6110 } else { 6111 sa = src; 6112 } 6113 peer_supports_ecn = 0; 6114 peer_supports_prsctp = 0; 6115 peer_supports_auth = 0; 6116 peer_supports_asconf = 0; 6117 peer_supports_reconfig = 0; 6118 peer_supports_nrsack = 0; 6119 peer_supports_pktdrop = 0; 6120 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6121 /* mark all addresses that we have currently on the list */ 6122 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6123 } 6124 /* does the source address already exist? if so skip it */ 6125 inp = stcb->sctp_ep; 6126 atomic_add_int(&stcb->asoc.refcnt, 1); 6127 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6128 atomic_add_int(&stcb->asoc.refcnt, -1); 6129 6130 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6131 /* we must add the source address */ 6132 /* no scope set here since we have a tcb already. */ 6133 switch (sa->sa_family) { 6134 #ifdef INET 6135 case AF_INET: 6136 if (stcb->asoc.scope.ipv4_addr_legal) { 6137 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6138 return (-1); 6139 } 6140 } 6141 break; 6142 #endif 6143 #ifdef INET6 6144 case AF_INET6: 6145 if (stcb->asoc.scope.ipv6_addr_legal) { 6146 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6147 return (-2); 6148 } 6149 } 6150 break; 6151 #endif 6152 default: 6153 break; 6154 } 6155 } else { 6156 if (net_tmp != NULL && stcb_tmp == stcb) { 6157 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6158 } else if (stcb_tmp != stcb) { 6159 /* It belongs to another association? */ 6160 if (stcb_tmp) 6161 SCTP_TCB_UNLOCK(stcb_tmp); 6162 return (-3); 6163 } 6164 } 6165 if (stcb->asoc.state == 0) { 6166 /* the assoc was freed? */ 6167 return (-4); 6168 } 6169 /* now we must go through each of the params. */ 6170 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6171 while (phdr) { 6172 ptype = ntohs(phdr->param_type); 6173 plen = ntohs(phdr->param_length); 6174 /* 6175 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6176 * (uint32_t)ptype, (int)plen); 6177 */ 6178 if (offset + plen > limit) { 6179 break; 6180 } 6181 if (plen == 0) { 6182 break; 6183 } 6184 #ifdef INET 6185 if (ptype == SCTP_IPV4_ADDRESS) { 6186 if (stcb->asoc.scope.ipv4_addr_legal) { 6187 struct sctp_ipv4addr_param *p4, p4_buf; 6188 6189 /* ok get the v4 address and check/add */ 6190 phdr = sctp_get_next_param(m, offset, 6191 (struct sctp_paramhdr *)&p4_buf, 6192 sizeof(p4_buf)); 6193 if (plen != sizeof(struct sctp_ipv4addr_param) || 6194 phdr == NULL) { 6195 return (-5); 6196 } 6197 p4 = (struct sctp_ipv4addr_param *)phdr; 6198 sin.sin_addr.s_addr = p4->addr; 6199 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6200 /* Skip multi-cast addresses */ 6201 goto next_param; 6202 } 6203 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6204 (sin.sin_addr.s_addr == INADDR_ANY)) { 6205 goto next_param; 6206 } 6207 sa = (struct sockaddr *)&sin; 6208 inp = stcb->sctp_ep; 6209 atomic_add_int(&stcb->asoc.refcnt, 1); 6210 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6211 dst, stcb); 6212 atomic_add_int(&stcb->asoc.refcnt, -1); 6213 6214 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6215 inp == NULL) { 6216 /* we must add the source address */ 6217 /* 6218 * no scope set since we have a tcb 6219 * already 6220 */ 6221 6222 /* 6223 * we must validate the state again 6224 * here 6225 */ 6226 add_it_now: 6227 if (stcb->asoc.state == 0) { 6228 /* the assoc was freed? */ 6229 return (-7); 6230 } 6231 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6232 return (-8); 6233 } 6234 } else if (stcb_tmp == stcb) { 6235 if (stcb->asoc.state == 0) { 6236 /* the assoc was freed? */ 6237 return (-10); 6238 } 6239 if (net != NULL) { 6240 /* clear flag */ 6241 net->dest_state &= 6242 ~SCTP_ADDR_NOT_IN_ASSOC; 6243 } 6244 } else { 6245 /* 6246 * strange, address is in another 6247 * assoc? straighten out locks. 6248 */ 6249 if (stcb_tmp) { 6250 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6251 /* 6252 * in setup state we 6253 * abort this guy 6254 */ 6255 sctp_abort_an_association(stcb_tmp->sctp_ep, 6256 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6257 goto add_it_now; 6258 } 6259 SCTP_TCB_UNLOCK(stcb_tmp); 6260 } 6261 if (stcb->asoc.state == 0) { 6262 /* the assoc was freed? */ 6263 return (-12); 6264 } 6265 return (-13); 6266 } 6267 } 6268 } else 6269 #endif 6270 #ifdef INET6 6271 if (ptype == SCTP_IPV6_ADDRESS) { 6272 if (stcb->asoc.scope.ipv6_addr_legal) { 6273 /* ok get the v6 address and check/add */ 6274 struct sctp_ipv6addr_param *p6, p6_buf; 6275 6276 phdr = sctp_get_next_param(m, offset, 6277 (struct sctp_paramhdr *)&p6_buf, 6278 sizeof(p6_buf)); 6279 if (plen != sizeof(struct sctp_ipv6addr_param) || 6280 phdr == NULL) { 6281 return (-14); 6282 } 6283 p6 = (struct sctp_ipv6addr_param *)phdr; 6284 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6285 sizeof(p6->addr)); 6286 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6287 /* Skip multi-cast addresses */ 6288 goto next_param; 6289 } 6290 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6291 /* 6292 * Link local make no sense without 6293 * scope 6294 */ 6295 goto next_param; 6296 } 6297 sa = (struct sockaddr *)&sin6; 6298 inp = stcb->sctp_ep; 6299 atomic_add_int(&stcb->asoc.refcnt, 1); 6300 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6301 dst, stcb); 6302 atomic_add_int(&stcb->asoc.refcnt, -1); 6303 if (stcb_tmp == NULL && 6304 (inp == stcb->sctp_ep || inp == NULL)) { 6305 /* 6306 * we must validate the state again 6307 * here 6308 */ 6309 add_it_now6: 6310 if (stcb->asoc.state == 0) { 6311 /* the assoc was freed? */ 6312 return (-16); 6313 } 6314 /* 6315 * we must add the address, no scope 6316 * set 6317 */ 6318 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6319 return (-17); 6320 } 6321 } else if (stcb_tmp == stcb) { 6322 /* 6323 * we must validate the state again 6324 * here 6325 */ 6326 if (stcb->asoc.state == 0) { 6327 /* the assoc was freed? */ 6328 return (-19); 6329 } 6330 if (net != NULL) { 6331 /* clear flag */ 6332 net->dest_state &= 6333 ~SCTP_ADDR_NOT_IN_ASSOC; 6334 } 6335 } else { 6336 /* 6337 * strange, address is in another 6338 * assoc? straighten out locks. 6339 */ 6340 if (stcb_tmp) 6341 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6342 /* 6343 * in setup state we 6344 * abort this guy 6345 */ 6346 sctp_abort_an_association(stcb_tmp->sctp_ep, 6347 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6348 goto add_it_now6; 6349 } 6350 SCTP_TCB_UNLOCK(stcb_tmp); 6351 6352 if (stcb->asoc.state == 0) { 6353 /* the assoc was freed? */ 6354 return (-21); 6355 } 6356 return (-22); 6357 } 6358 } 6359 } else 6360 #endif 6361 if (ptype == SCTP_ECN_CAPABLE) { 6362 peer_supports_ecn = 1; 6363 } else if (ptype == SCTP_ULP_ADAPTATION) { 6364 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6365 struct sctp_adaptation_layer_indication ai, 6366 *aip; 6367 6368 phdr = sctp_get_next_param(m, offset, 6369 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6370 aip = (struct sctp_adaptation_layer_indication *)phdr; 6371 if (aip) { 6372 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6373 stcb->asoc.adaptation_needed = 1; 6374 } 6375 } 6376 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6377 struct sctp_asconf_addr_param lstore, *fee; 6378 int lptype; 6379 struct sockaddr *lsa = NULL; 6380 6381 #ifdef INET 6382 struct sctp_asconf_addrv4_param *fii; 6383 6384 #endif 6385 6386 if (stcb->asoc.asconf_supported == 0) { 6387 return (-100); 6388 } 6389 if (plen > sizeof(lstore)) { 6390 return (-23); 6391 } 6392 phdr = sctp_get_next_param(m, offset, 6393 (struct sctp_paramhdr *)&lstore, 6394 min(plen, sizeof(lstore))); 6395 if (phdr == NULL) { 6396 return (-24); 6397 } 6398 fee = (struct sctp_asconf_addr_param *)phdr; 6399 lptype = ntohs(fee->addrp.ph.param_type); 6400 switch (lptype) { 6401 #ifdef INET 6402 case SCTP_IPV4_ADDRESS: 6403 if (plen != 6404 sizeof(struct sctp_asconf_addrv4_param)) { 6405 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6406 (int)sizeof(struct sctp_asconf_addrv4_param), 6407 plen); 6408 } else { 6409 fii = (struct sctp_asconf_addrv4_param *)fee; 6410 sin.sin_addr.s_addr = fii->addrp.addr; 6411 lsa = (struct sockaddr *)&sin; 6412 } 6413 break; 6414 #endif 6415 #ifdef INET6 6416 case SCTP_IPV6_ADDRESS: 6417 if (plen != 6418 sizeof(struct sctp_asconf_addr_param)) { 6419 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6420 (int)sizeof(struct sctp_asconf_addr_param), 6421 plen); 6422 } else { 6423 memcpy(sin6.sin6_addr.s6_addr, 6424 fee->addrp.addr, 6425 sizeof(fee->addrp.addr)); 6426 lsa = (struct sockaddr *)&sin6; 6427 } 6428 break; 6429 #endif 6430 default: 6431 break; 6432 } 6433 if (lsa) { 6434 (void)sctp_set_primary_addr(stcb, sa, NULL); 6435 } 6436 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6437 stcb->asoc.peer_supports_nat = 1; 6438 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6439 /* Peer supports pr-sctp */ 6440 peer_supports_prsctp = 1; 6441 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6442 /* A supported extension chunk */ 6443 struct sctp_supported_chunk_types_param *pr_supported; 6444 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6445 int num_ent, i; 6446 6447 phdr = sctp_get_next_param(m, offset, 6448 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6449 if (phdr == NULL) { 6450 return (-25); 6451 } 6452 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6453 num_ent = plen - sizeof(struct sctp_paramhdr); 6454 for (i = 0; i < num_ent; i++) { 6455 switch (pr_supported->chunk_types[i]) { 6456 case SCTP_ASCONF: 6457 peer_supports_asconf = 1; 6458 break; 6459 case SCTP_ASCONF_ACK: 6460 peer_supports_asconf_ack = 1; 6461 break; 6462 case SCTP_FORWARD_CUM_TSN: 6463 peer_supports_prsctp = 1; 6464 break; 6465 case SCTP_PACKET_DROPPED: 6466 peer_supports_pktdrop = 1; 6467 break; 6468 case SCTP_NR_SELECTIVE_ACK: 6469 peer_supports_nrsack = 1; 6470 break; 6471 case SCTP_STREAM_RESET: 6472 peer_supports_reconfig = 1; 6473 break; 6474 case SCTP_AUTHENTICATION: 6475 peer_supports_auth = 1; 6476 break; 6477 default: 6478 /* one I have not learned yet */ 6479 break; 6480 6481 } 6482 } 6483 } else if (ptype == SCTP_RANDOM) { 6484 if (plen > sizeof(random_store)) 6485 break; 6486 if (got_random) { 6487 /* already processed a RANDOM */ 6488 goto next_param; 6489 } 6490 phdr = sctp_get_next_param(m, offset, 6491 (struct sctp_paramhdr *)random_store, 6492 min(sizeof(random_store), plen)); 6493 if (phdr == NULL) 6494 return (-26); 6495 p_random = (struct sctp_auth_random *)phdr; 6496 random_len = plen - sizeof(*p_random); 6497 /* enforce the random length */ 6498 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6499 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6500 return (-27); 6501 } 6502 got_random = 1; 6503 } else if (ptype == SCTP_HMAC_LIST) { 6504 uint16_t num_hmacs; 6505 uint16_t i; 6506 6507 if (plen > sizeof(hmacs_store)) 6508 break; 6509 if (got_hmacs) { 6510 /* already processed a HMAC list */ 6511 goto next_param; 6512 } 6513 phdr = sctp_get_next_param(m, offset, 6514 (struct sctp_paramhdr *)hmacs_store, 6515 min(plen, sizeof(hmacs_store))); 6516 if (phdr == NULL) 6517 return (-28); 6518 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6519 hmacs_len = plen - sizeof(*hmacs); 6520 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6521 /* validate the hmac list */ 6522 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6523 return (-29); 6524 } 6525 if (stcb->asoc.peer_hmacs != NULL) 6526 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6527 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6528 if (stcb->asoc.peer_hmacs != NULL) { 6529 for (i = 0; i < num_hmacs; i++) { 6530 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6531 ntohs(hmacs->hmac_ids[i])); 6532 } 6533 } 6534 got_hmacs = 1; 6535 } else if (ptype == SCTP_CHUNK_LIST) { 6536 int i; 6537 6538 if (plen > sizeof(chunks_store)) 6539 break; 6540 if (got_chklist) { 6541 /* already processed a Chunks list */ 6542 goto next_param; 6543 } 6544 phdr = sctp_get_next_param(m, offset, 6545 (struct sctp_paramhdr *)chunks_store, 6546 min(plen, sizeof(chunks_store))); 6547 if (phdr == NULL) 6548 return (-30); 6549 chunks = (struct sctp_auth_chunk_list *)phdr; 6550 num_chunks = plen - sizeof(*chunks); 6551 if (stcb->asoc.peer_auth_chunks != NULL) 6552 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6553 else 6554 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6555 for (i = 0; i < num_chunks; i++) { 6556 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6557 stcb->asoc.peer_auth_chunks); 6558 /* record asconf/asconf-ack if listed */ 6559 if (chunks->chunk_types[i] == SCTP_ASCONF) 6560 saw_asconf = 1; 6561 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6562 saw_asconf_ack = 1; 6563 6564 } 6565 got_chklist = 1; 6566 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6567 (ptype == SCTP_STATE_COOKIE) || 6568 (ptype == SCTP_UNRECOG_PARAM) || 6569 (ptype == SCTP_COOKIE_PRESERVE) || 6570 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6571 (ptype == SCTP_ADD_IP_ADDRESS) || 6572 (ptype == SCTP_DEL_IP_ADDRESS) || 6573 (ptype == SCTP_ERROR_CAUSE_IND) || 6574 (ptype == SCTP_SUCCESS_REPORT)) { 6575 /* don't care */ ; 6576 } else { 6577 if ((ptype & 0x8000) == 0x0000) { 6578 /* 6579 * must stop processing the rest of the 6580 * param's. Any report bits were handled 6581 * with the call to 6582 * sctp_arethere_unrecognized_parameters() 6583 * when the INIT or INIT-ACK was first seen. 6584 */ 6585 break; 6586 } 6587 } 6588 6589 next_param: 6590 offset += SCTP_SIZE32(plen); 6591 if (offset >= limit) { 6592 break; 6593 } 6594 phdr = sctp_get_next_param(m, offset, &parm_buf, 6595 sizeof(parm_buf)); 6596 } 6597 /* Now check to see if we need to purge any addresses */ 6598 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6599 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6600 SCTP_ADDR_NOT_IN_ASSOC) { 6601 /* This address has been removed from the asoc */ 6602 /* remove and free it */ 6603 stcb->asoc.numnets--; 6604 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6605 sctp_free_remote_addr(net); 6606 if (net == stcb->asoc.primary_destination) { 6607 stcb->asoc.primary_destination = NULL; 6608 sctp_select_primary_destination(stcb); 6609 } 6610 } 6611 } 6612 if ((stcb->asoc.ecn_supported == 1) && 6613 (peer_supports_ecn == 0)) { 6614 stcb->asoc.ecn_supported = 0; 6615 } 6616 if ((stcb->asoc.prsctp_supported == 1) && 6617 (peer_supports_prsctp == 0)) { 6618 stcb->asoc.prsctp_supported = 0; 6619 } 6620 if ((stcb->asoc.auth_supported == 1) && 6621 ((peer_supports_auth == 0) || 6622 (got_random == 0) || (got_hmacs == 0))) { 6623 stcb->asoc.auth_supported = 0; 6624 } 6625 if ((stcb->asoc.asconf_supported == 1) && 6626 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6627 (stcb->asoc.auth_supported == 0) || 6628 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6629 stcb->asoc.asconf_supported = 0; 6630 } 6631 if ((stcb->asoc.reconfig_supported == 1) && 6632 (peer_supports_reconfig == 0)) { 6633 stcb->asoc.reconfig_supported = 0; 6634 } 6635 if ((stcb->asoc.nrsack_supported == 1) && 6636 (peer_supports_nrsack == 0)) { 6637 stcb->asoc.nrsack_supported = 0; 6638 } 6639 if ((stcb->asoc.pktdrop_supported == 1) && 6640 (peer_supports_pktdrop == 0)) { 6641 stcb->asoc.pktdrop_supported = 0; 6642 } 6643 /* validate authentication required parameters */ 6644 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6645 /* peer does not support auth but sent a chunks list? */ 6646 return (-31); 6647 } 6648 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6649 /* peer supports asconf but not auth? */ 6650 return (-32); 6651 } else if ((peer_supports_asconf == 1) && 6652 (peer_supports_auth == 1) && 6653 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6654 return (-33); 6655 } 6656 /* concatenate the full random key */ 6657 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6658 if (chunks != NULL) { 6659 keylen += sizeof(*chunks) + num_chunks; 6660 } 6661 new_key = sctp_alloc_key(keylen); 6662 if (new_key != NULL) { 6663 /* copy in the RANDOM */ 6664 if (p_random != NULL) { 6665 keylen = sizeof(*p_random) + random_len; 6666 bcopy(p_random, new_key->key, keylen); 6667 } 6668 /* append in the AUTH chunks */ 6669 if (chunks != NULL) { 6670 bcopy(chunks, new_key->key + keylen, 6671 sizeof(*chunks) + num_chunks); 6672 keylen += sizeof(*chunks) + num_chunks; 6673 } 6674 /* append in the HMACs */ 6675 if (hmacs != NULL) { 6676 bcopy(hmacs, new_key->key + keylen, 6677 sizeof(*hmacs) + hmacs_len); 6678 } 6679 } else { 6680 /* failed to get memory for the key */ 6681 return (-34); 6682 } 6683 if (stcb->asoc.authinfo.peer_random != NULL) 6684 sctp_free_key(stcb->asoc.authinfo.peer_random); 6685 stcb->asoc.authinfo.peer_random = new_key; 6686 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6687 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6688 6689 return (0); 6690 } 6691 6692 int 6693 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6694 struct sctp_nets *net) 6695 { 6696 /* make sure the requested primary address exists in the assoc */ 6697 if (net == NULL && sa) 6698 net = sctp_findnet(stcb, sa); 6699 6700 if (net == NULL) { 6701 /* didn't find the requested primary address! */ 6702 return (-1); 6703 } else { 6704 /* set the primary address */ 6705 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6706 /* Must be confirmed, so queue to set */ 6707 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6708 return (0); 6709 } 6710 stcb->asoc.primary_destination = net; 6711 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6712 sctp_free_remote_addr(stcb->asoc.alternate); 6713 stcb->asoc.alternate = NULL; 6714 } 6715 net = TAILQ_FIRST(&stcb->asoc.nets); 6716 if (net != stcb->asoc.primary_destination) { 6717 /* 6718 * first one on the list is NOT the primary 6719 * sctp_cmpaddr() is much more efficient if the 6720 * primary is the first on the list, make it so. 6721 */ 6722 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6723 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6724 } 6725 return (0); 6726 } 6727 } 6728 6729 int 6730 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6731 { 6732 /* 6733 * This function serves two purposes. It will see if a TAG can be 6734 * re-used and return 1 for yes it is ok and 0 for don't use that 6735 * tag. A secondary function it will do is purge out old tags that 6736 * can be removed. 6737 */ 6738 struct sctpvtaghead *chain; 6739 struct sctp_tagblock *twait_block; 6740 struct sctpasochead *head; 6741 struct sctp_tcb *stcb; 6742 int i; 6743 6744 SCTP_INP_INFO_RLOCK(); 6745 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6746 SCTP_BASE_INFO(hashasocmark))]; 6747 LIST_FOREACH(stcb, head, sctp_asocs) { 6748 /* 6749 * We choose not to lock anything here. TCB's can't be 6750 * removed since we have the read lock, so they can't be 6751 * freed on us, same thing for the INP. I may be wrong with 6752 * this assumption, but we will go with it for now :-) 6753 */ 6754 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6755 continue; 6756 } 6757 if (stcb->asoc.my_vtag == tag) { 6758 /* candidate */ 6759 if (stcb->rport != rport) { 6760 continue; 6761 } 6762 if (stcb->sctp_ep->sctp_lport != lport) { 6763 continue; 6764 } 6765 /* Its a used tag set */ 6766 SCTP_INP_INFO_RUNLOCK(); 6767 return (0); 6768 } 6769 } 6770 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6771 /* Now what about timed wait ? */ 6772 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6773 /* 6774 * Block(s) are present, lets see if we have this tag in the 6775 * list 6776 */ 6777 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6778 if (twait_block->vtag_block[i].v_tag == 0) { 6779 /* not used */ 6780 continue; 6781 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6782 now->tv_sec) { 6783 /* Audit expires this guy */ 6784 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6785 twait_block->vtag_block[i].v_tag = 0; 6786 twait_block->vtag_block[i].lport = 0; 6787 twait_block->vtag_block[i].rport = 0; 6788 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6789 (twait_block->vtag_block[i].lport == lport) && 6790 (twait_block->vtag_block[i].rport == rport)) { 6791 /* Bad tag, sorry :< */ 6792 SCTP_INP_INFO_RUNLOCK(); 6793 return (0); 6794 } 6795 } 6796 } 6797 SCTP_INP_INFO_RUNLOCK(); 6798 return (1); 6799 } 6800 6801 static void 6802 sctp_drain_mbufs(struct sctp_tcb *stcb) 6803 { 6804 /* 6805 * We must hunt this association for MBUF's past the cumack (i.e. 6806 * out of order data that we can renege on). 6807 */ 6808 struct sctp_association *asoc; 6809 struct sctp_tmit_chunk *chk, *nchk; 6810 uint32_t cumulative_tsn_p1; 6811 struct sctp_queued_to_read *ctl, *nctl; 6812 int cnt, strmat; 6813 uint32_t gap, i; 6814 int fnd = 0; 6815 6816 /* We look for anything larger than the cum-ack + 1 */ 6817 6818 asoc = &stcb->asoc; 6819 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6820 /* none we can reneg on. */ 6821 return; 6822 } 6823 SCTP_STAT_INCR(sctps_protocol_drains_done); 6824 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6825 cnt = 0; 6826 /* First look in the re-assembly queue */ 6827 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6828 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6829 /* Yep it is above cum-ack */ 6830 cnt++; 6831 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6832 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6833 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6834 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6835 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6836 if (chk->data) { 6837 sctp_m_freem(chk->data); 6838 chk->data = NULL; 6839 } 6840 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6841 } 6842 } 6843 /* Ok that was fun, now we will drain all the inbound streams? */ 6844 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6845 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6846 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6847 /* Yep it is above cum-ack */ 6848 cnt++; 6849 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6850 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6851 sctp_ucount_decr(asoc->cnt_on_all_streams); 6852 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6853 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6854 if (ctl->data) { 6855 sctp_m_freem(ctl->data); 6856 ctl->data = NULL; 6857 } 6858 sctp_free_remote_addr(ctl->whoFrom); 6859 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6860 SCTP_DECR_READQ_COUNT(); 6861 } 6862 } 6863 } 6864 if (cnt) { 6865 /* We must back down to see what the new highest is */ 6866 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6867 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6868 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6869 asoc->highest_tsn_inside_map = i; 6870 fnd = 1; 6871 break; 6872 } 6873 } 6874 if (!fnd) { 6875 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6876 } 6877 /* 6878 * Question, should we go through the delivery queue? The 6879 * only reason things are on here is the app not reading OR 6880 * a p-d-api up. An attacker COULD send enough in to 6881 * initiate the PD-API and then send a bunch of stuff to 6882 * other streams... these would wind up on the delivery 6883 * queue.. and then we would not get to them. But in order 6884 * to do this I then have to back-track and un-deliver 6885 * sequence numbers in streams.. el-yucko. I think for now 6886 * we will NOT look at the delivery queue and leave it to be 6887 * something to consider later. An alternative would be to 6888 * abort the P-D-API with a notification and then deliver 6889 * the data.... Or another method might be to keep track of 6890 * how many times the situation occurs and if we see a 6891 * possible attack underway just abort the association. 6892 */ 6893 #ifdef SCTP_DEBUG 6894 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6895 #endif 6896 /* 6897 * Now do we need to find a new 6898 * asoc->highest_tsn_inside_map? 6899 */ 6900 asoc->last_revoke_count = cnt; 6901 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6902 /* sa_ignore NO_NULL_CHK */ 6903 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6904 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6905 } 6906 /* 6907 * Another issue, in un-setting the TSN's in the mapping array we 6908 * DID NOT adjust the highest_tsn marker. This will cause one of 6909 * two things to occur. It may cause us to do extra work in checking 6910 * for our mapping array movement. More importantly it may cause us 6911 * to SACK every datagram. This may not be a bad thing though since 6912 * we will recover once we get our cum-ack above and all this stuff 6913 * we dumped recovered. 6914 */ 6915 } 6916 6917 void 6918 sctp_drain() 6919 { 6920 /* 6921 * We must walk the PCB lists for ALL associations here. The system 6922 * is LOW on MBUF's and needs help. This is where reneging will 6923 * occur. We really hope this does NOT happen! 6924 */ 6925 VNET_ITERATOR_DECL(vnet_iter); 6926 VNET_LIST_RLOCK_NOSLEEP(); 6927 VNET_FOREACH(vnet_iter) { 6928 CURVNET_SET(vnet_iter); 6929 struct sctp_inpcb *inp; 6930 struct sctp_tcb *stcb; 6931 6932 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6933 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6934 #ifdef VIMAGE 6935 continue; 6936 #else 6937 return; 6938 #endif 6939 } 6940 SCTP_INP_INFO_RLOCK(); 6941 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6942 /* For each endpoint */ 6943 SCTP_INP_RLOCK(inp); 6944 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6945 /* For each association */ 6946 SCTP_TCB_LOCK(stcb); 6947 sctp_drain_mbufs(stcb); 6948 SCTP_TCB_UNLOCK(stcb); 6949 } 6950 SCTP_INP_RUNLOCK(inp); 6951 } 6952 SCTP_INP_INFO_RUNLOCK(); 6953 CURVNET_RESTORE(); 6954 } 6955 VNET_LIST_RUNLOCK_NOSLEEP(); 6956 } 6957 6958 /* 6959 * start a new iterator 6960 * iterates through all endpoints and associations based on the pcb_state 6961 * flags and asoc_state. "af" (mandatory) is executed for all matching 6962 * assocs and "ef" (optional) is executed when the iterator completes. 6963 * "inpf" (optional) is executed for each new endpoint as it is being 6964 * iterated through. inpe (optional) is called when the inp completes 6965 * its way through all the stcbs. 6966 */ 6967 int 6968 sctp_initiate_iterator(inp_func inpf, 6969 asoc_func af, 6970 inp_func inpe, 6971 uint32_t pcb_state, 6972 uint32_t pcb_features, 6973 uint32_t asoc_state, 6974 void *argp, 6975 uint32_t argi, 6976 end_func ef, 6977 struct sctp_inpcb *s_inp, 6978 uint8_t chunk_output_off) 6979 { 6980 struct sctp_iterator *it = NULL; 6981 6982 if (af == NULL) { 6983 return (-1); 6984 } 6985 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6986 SCTP_M_ITER); 6987 if (it == NULL) { 6988 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6989 return (ENOMEM); 6990 } 6991 memset(it, 0, sizeof(*it)); 6992 it->function_assoc = af; 6993 it->function_inp = inpf; 6994 if (inpf) 6995 it->done_current_ep = 0; 6996 else 6997 it->done_current_ep = 1; 6998 it->function_atend = ef; 6999 it->pointer = argp; 7000 it->val = argi; 7001 it->pcb_flags = pcb_state; 7002 it->pcb_features = pcb_features; 7003 it->asoc_state = asoc_state; 7004 it->function_inp_end = inpe; 7005 it->no_chunk_output = chunk_output_off; 7006 it->vn = curvnet; 7007 if (s_inp) { 7008 /* Assume lock is held here */ 7009 it->inp = s_inp; 7010 SCTP_INP_INCR_REF(it->inp); 7011 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7012 } else { 7013 SCTP_INP_INFO_RLOCK(); 7014 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7015 if (it->inp) { 7016 SCTP_INP_INCR_REF(it->inp); 7017 } 7018 SCTP_INP_INFO_RUNLOCK(); 7019 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7020 7021 } 7022 SCTP_IPI_ITERATOR_WQ_LOCK(); 7023 7024 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7025 if (sctp_it_ctl.iterator_running == 0) { 7026 sctp_wakeup_iterator(); 7027 } 7028 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7029 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7030 return (0); 7031 } 7032