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 #include <netinet/udp.h> 50 #ifdef INET6 51 #include <netinet6/ip6_var.h> 52 #endif 53 #include <sys/sched.h> 54 #include <sys/smp.h> 55 #include <sys/unistd.h> 56 57 58 VNET_DEFINE(struct sctp_base_info, system_base_info); 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 79 #endif 80 81 void 82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 83 { 84 /* 85 * We really don't need to lock this, but I will just because it 86 * does not hurt. 87 */ 88 SCTP_INP_INFO_RLOCK(); 89 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 90 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 91 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 92 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 93 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 94 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 95 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 96 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 97 SCTP_INP_INFO_RUNLOCK(); 98 } 99 100 /*- 101 * Addresses are added to VRF's (Virtual Router's). For BSD we 102 * have only the default VRF 0. We maintain a hash list of 103 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 104 * these has a list of addresses. When we add a new address 105 * to a VRF we lookup the ifn/ifn_index, if the ifn does 106 * not exist we create it and add it to the list of IFN's 107 * within the VRF. Once we have the sctp_ifn, we add the 108 * address to the list. So we look something like: 109 * 110 * hash-vrf-table 111 * vrf-> ifn-> ifn -> ifn 112 * vrf | 113 * ... +--ifa-> ifa -> ifa 114 * vrf 115 * 116 * We keep these separate lists since the SCTP subsystem will 117 * point to these from its source address selection nets structure. 118 * When an address is deleted it does not happen right away on 119 * the SCTP side, it gets scheduled. What we do when a 120 * delete happens is immediately remove the address from 121 * the master list and decrement the refcount. As our 122 * addip iterator works through and frees the src address 123 * selection pointing to the sctp_ifa, eventually the refcount 124 * will reach 0 and we will delete it. Note that it is assumed 125 * that any locking on system level ifn/ifa is done at the 126 * caller of these functions and these routines will only 127 * lock the SCTP structures as they add or delete things. 128 * 129 * Other notes on VRF concepts. 130 * - An endpoint can be in multiple VRF's 131 * - An association lives within a VRF and only one VRF. 132 * - Any incoming packet we can deduce the VRF for by 133 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 134 * - Any downward send call or connect call must supply the 135 * VRF via ancillary data or via some sort of set default 136 * VRF socket option call (again for BSD no brainer since 137 * the VRF is always 0). 138 * - An endpoint may add multiple VRF's to it. 139 * - Listening sockets can accept associations in any 140 * of the VRF's they are in but the assoc will end up 141 * in only one VRF (gotten from the packet or connect/send). 142 * 143 */ 144 145 struct sctp_vrf * 146 sctp_allocate_vrf(int vrf_id) 147 { 148 struct sctp_vrf *vrf = NULL; 149 struct sctp_vrflist *bucket; 150 151 /* First allocate the VRF structure */ 152 vrf = sctp_find_vrf(vrf_id); 153 if (vrf) { 154 /* Already allocated */ 155 return (vrf); 156 } 157 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 158 SCTP_M_VRF); 159 if (vrf == NULL) { 160 /* No memory */ 161 #ifdef INVARIANTS 162 panic("No memory for VRF:%d", vrf_id); 163 #endif 164 return (NULL); 165 } 166 /* setup the VRF */ 167 memset(vrf, 0, sizeof(struct sctp_vrf)); 168 vrf->vrf_id = vrf_id; 169 LIST_INIT(&vrf->ifnlist); 170 vrf->total_ifa_count = 0; 171 vrf->refcount = 0; 172 /* now also setup table ids */ 173 SCTP_INIT_VRF_TABLEID(vrf); 174 /* Init the HASH of addresses */ 175 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 176 &vrf->vrf_addr_hashmark); 177 if (vrf->vrf_addr_hash == NULL) { 178 /* No memory */ 179 #ifdef INVARIANTS 180 panic("No memory for VRF:%d", vrf_id); 181 #endif 182 SCTP_FREE(vrf, SCTP_M_VRF); 183 return (NULL); 184 } 185 /* Add it to the hash table */ 186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 187 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 189 return (vrf); 190 } 191 192 193 struct sctp_ifn * 194 sctp_find_ifn(void *ifn, uint32_t ifn_index) 195 { 196 struct sctp_ifn *sctp_ifnp; 197 struct sctp_ifnlist *hash_ifn_head; 198 199 /* 200 * We assume the lock is held for the addresses if that's wrong 201 * problems could occur :-) 202 */ 203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 205 if (sctp_ifnp->ifn_index == ifn_index) { 206 return (sctp_ifnp); 207 } 208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 209 return (sctp_ifnp); 210 } 211 } 212 return (NULL); 213 } 214 215 216 struct sctp_vrf * 217 sctp_find_vrf(uint32_t vrf_id) 218 { 219 struct sctp_vrflist *bucket; 220 struct sctp_vrf *liste; 221 222 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 223 LIST_FOREACH(liste, bucket, next_vrf) { 224 if (vrf_id == liste->vrf_id) { 225 return (liste); 226 } 227 } 228 return (NULL); 229 } 230 231 232 void 233 sctp_free_vrf(struct sctp_vrf *vrf) 234 { 235 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 236 if (vrf->vrf_addr_hash) { 237 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 238 vrf->vrf_addr_hash = NULL; 239 } 240 /* We zero'd the count */ 241 LIST_REMOVE(vrf, next_vrf); 242 SCTP_FREE(vrf, SCTP_M_VRF); 243 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 244 } 245 } 246 247 248 void 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 250 { 251 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 252 /* We zero'd the count */ 253 if (sctp_ifnp->vrf) { 254 sctp_free_vrf(sctp_ifnp->vrf); 255 } 256 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 257 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 258 } 259 } 260 261 262 void 263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 264 { 265 struct sctp_ifn *sctp_ifnp; 266 267 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 268 if (sctp_ifnp != NULL) { 269 sctp_ifnp->ifn_mtu = mtu; 270 } 271 } 272 273 274 void 275 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 276 { 277 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 278 /* We zero'd the count */ 279 if (sctp_ifap->ifn_p) { 280 sctp_free_ifn(sctp_ifap->ifn_p); 281 } 282 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 283 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 284 } 285 } 286 287 288 static void 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 290 { 291 struct sctp_ifn *found; 292 293 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 294 if (found == NULL) { 295 /* Not in the list.. sorry */ 296 return; 297 } 298 if (hold_addr_lock == 0) 299 SCTP_IPI_ADDR_WLOCK(); 300 LIST_REMOVE(sctp_ifnp, next_bucket); 301 LIST_REMOVE(sctp_ifnp, next_ifn); 302 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 303 sctp_ifnp->registered_af); 304 if (hold_addr_lock == 0) 305 SCTP_IPI_ADDR_WUNLOCK(); 306 /* Take away the reference, and possibly free it */ 307 sctp_free_ifn(sctp_ifnp); 308 } 309 310 311 void 312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 313 const char *if_name, uint32_t ifn_index) 314 { 315 struct sctp_vrf *vrf; 316 struct sctp_ifa *sctp_ifap; 317 318 SCTP_IPI_ADDR_RLOCK(); 319 vrf = sctp_find_vrf(vrf_id); 320 if (vrf == NULL) { 321 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 322 goto out; 323 324 } 325 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 326 if (sctp_ifap == NULL) { 327 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 328 goto out; 329 } 330 if (sctp_ifap->ifn_p == NULL) { 331 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 332 goto out; 333 } 334 if (if_name) { 335 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 337 sctp_ifap->ifn_p->ifn_name, if_name); 338 goto out; 339 } 340 } else { 341 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 342 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 343 sctp_ifap->ifn_p->ifn_index, ifn_index); 344 goto out; 345 } 346 } 347 348 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 349 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 350 out: 351 SCTP_IPI_ADDR_RUNLOCK(); 352 } 353 354 355 void 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 357 const char *if_name, uint32_t ifn_index) 358 { 359 struct sctp_vrf *vrf; 360 struct sctp_ifa *sctp_ifap; 361 362 SCTP_IPI_ADDR_RLOCK(); 363 vrf = sctp_find_vrf(vrf_id); 364 if (vrf == NULL) { 365 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 366 goto out; 367 368 } 369 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 370 if (sctp_ifap == NULL) { 371 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 372 goto out; 373 } 374 if (sctp_ifap->ifn_p == NULL) { 375 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 376 goto out; 377 } 378 if (if_name) { 379 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 380 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 381 sctp_ifap->ifn_p->ifn_name, if_name); 382 goto out; 383 } 384 } else { 385 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 386 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 387 sctp_ifap->ifn_p->ifn_index, ifn_index); 388 goto out; 389 } 390 } 391 392 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 393 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 394 out: 395 SCTP_IPI_ADDR_RUNLOCK(); 396 } 397 398 399 /*- 400 * Add an ifa to an ifn. 401 * Register the interface as necessary. 402 * NOTE: ADDR write lock MUST be held. 403 */ 404 static void 405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 406 { 407 int ifa_af; 408 409 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 410 sctp_ifap->ifn_p = sctp_ifnp; 411 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 412 /* update address counts */ 413 sctp_ifnp->ifa_count++; 414 ifa_af = sctp_ifap->address.sa.sa_family; 415 switch (ifa_af) { 416 #ifdef INET 417 case AF_INET: 418 sctp_ifnp->num_v4++; 419 break; 420 #endif 421 #ifdef INET6 422 case AF_INET6: 423 sctp_ifnp->num_v6++; 424 break; 425 #endif 426 default: 427 break; 428 } 429 if (sctp_ifnp->ifa_count == 1) { 430 /* register the new interface */ 431 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 432 sctp_ifnp->registered_af = ifa_af; 433 } 434 } 435 436 437 /*- 438 * Remove an ifa from its ifn. 439 * If no more addresses exist, remove the ifn too. Otherwise, re-register 440 * the interface based on the remaining address families left. 441 * NOTE: ADDR write lock MUST be held. 442 */ 443 static void 444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 445 { 446 LIST_REMOVE(sctp_ifap, next_ifa); 447 if (sctp_ifap->ifn_p) { 448 /* update address counts */ 449 sctp_ifap->ifn_p->ifa_count--; 450 switch (sctp_ifap->address.sa.sa_family) { 451 #ifdef INET 452 case AF_INET: 453 sctp_ifap->ifn_p->num_v4--; 454 break; 455 #endif 456 #ifdef INET6 457 case AF_INET6: 458 sctp_ifap->ifn_p->num_v6--; 459 break; 460 #endif 461 default: 462 break; 463 } 464 465 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 466 /* remove the ifn, possibly freeing it */ 467 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 468 } else { 469 /* re-register address family type, if needed */ 470 if ((sctp_ifap->ifn_p->num_v6 == 0) && 471 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 472 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 473 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 474 sctp_ifap->ifn_p->registered_af = AF_INET; 475 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 476 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 477 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 478 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 479 sctp_ifap->ifn_p->registered_af = AF_INET6; 480 } 481 /* free the ifn refcount */ 482 sctp_free_ifn(sctp_ifap->ifn_p); 483 } 484 sctp_ifap->ifn_p = NULL; 485 } 486 } 487 488 489 struct sctp_ifa * 490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 491 uint32_t ifn_type, const char *if_name, void *ifa, 492 struct sockaddr *addr, uint32_t ifa_flags, 493 int dynamic_add) 494 { 495 struct sctp_vrf *vrf; 496 struct sctp_ifn *sctp_ifnp = NULL; 497 struct sctp_ifa *sctp_ifap = NULL; 498 struct sctp_ifalist *hash_addr_head; 499 struct sctp_ifnlist *hash_ifn_head; 500 uint32_t hash_of_addr; 501 int new_ifn_af = 0; 502 503 #ifdef SCTP_DEBUG 504 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 505 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 506 #endif 507 SCTP_IPI_ADDR_WLOCK(); 508 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 509 if (sctp_ifnp) { 510 vrf = sctp_ifnp->vrf; 511 } else { 512 vrf = sctp_find_vrf(vrf_id); 513 if (vrf == NULL) { 514 vrf = sctp_allocate_vrf(vrf_id); 515 if (vrf == NULL) { 516 SCTP_IPI_ADDR_WUNLOCK(); 517 return (NULL); 518 } 519 } 520 } 521 if (sctp_ifnp == NULL) { 522 /* 523 * build one and add it, can't hold lock until after malloc 524 * done though. 525 */ 526 SCTP_IPI_ADDR_WUNLOCK(); 527 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 528 sizeof(struct sctp_ifn), SCTP_M_IFN); 529 if (sctp_ifnp == NULL) { 530 #ifdef INVARIANTS 531 panic("No memory for IFN"); 532 #endif 533 return (NULL); 534 } 535 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 536 sctp_ifnp->ifn_index = ifn_index; 537 sctp_ifnp->ifn_p = ifn; 538 sctp_ifnp->ifn_type = ifn_type; 539 sctp_ifnp->refcount = 0; 540 sctp_ifnp->vrf = vrf; 541 atomic_add_int(&vrf->refcount, 1); 542 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 543 if (if_name != NULL) { 544 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 545 } else { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 547 } 548 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 549 LIST_INIT(&sctp_ifnp->ifalist); 550 SCTP_IPI_ADDR_WLOCK(); 551 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 552 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 553 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 554 new_ifn_af = 1; 555 } 556 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 557 if (sctp_ifap) { 558 /* Hmm, it already exists? */ 559 if ((sctp_ifap->ifn_p) && 560 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 561 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 562 sctp_ifap->ifn_p->ifn_name, ifn_index, 563 (void *)sctp_ifap); 564 if (new_ifn_af) { 565 /* Remove the created one that we don't want */ 566 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 567 } 568 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 569 /* easy to solve, just switch back to active */ 570 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 571 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 572 sctp_ifap->ifn_p = sctp_ifnp; 573 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 574 } 575 exit_stage_left: 576 SCTP_IPI_ADDR_WUNLOCK(); 577 return (sctp_ifap); 578 } else { 579 if (sctp_ifap->ifn_p) { 580 /* 581 * The last IFN gets the address, remove the 582 * old one 583 */ 584 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 585 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 586 sctp_ifap->ifn_p->ifn_index, if_name, 587 ifn_index); 588 /* remove the address from the old ifn */ 589 sctp_remove_ifa_from_ifn(sctp_ifap); 590 /* move the address over to the new ifn */ 591 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 592 goto exit_stage_left; 593 } else { 594 /* repair ifnp which was NULL ? */ 595 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 596 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 597 (void *)sctp_ifnp, (void *)sctp_ifap); 598 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 599 } 600 goto exit_stage_left; 601 } 602 } 603 SCTP_IPI_ADDR_WUNLOCK(); 604 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 605 if (sctp_ifap == NULL) { 606 #ifdef INVARIANTS 607 panic("No memory for IFA"); 608 #endif 609 return (NULL); 610 } 611 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 612 sctp_ifap->ifn_p = sctp_ifnp; 613 atomic_add_int(&sctp_ifnp->refcount, 1); 614 sctp_ifap->vrf_id = vrf_id; 615 sctp_ifap->ifa = ifa; 616 memcpy(&sctp_ifap->address, addr, addr->sa_len); 617 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 618 sctp_ifap->flags = ifa_flags; 619 /* Set scope */ 620 switch (sctp_ifap->address.sa.sa_family) { 621 #ifdef INET 622 case AF_INET: 623 { 624 struct sockaddr_in *sin; 625 626 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 627 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 628 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 629 sctp_ifap->src_is_loop = 1; 630 } 631 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 632 sctp_ifap->src_is_priv = 1; 633 } 634 sctp_ifnp->num_v4++; 635 if (new_ifn_af) 636 new_ifn_af = AF_INET; 637 break; 638 } 639 #endif 640 #ifdef INET6 641 case AF_INET6: 642 { 643 /* ok to use deprecated addresses? */ 644 struct sockaddr_in6 *sin6; 645 646 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 647 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 648 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 649 sctp_ifap->src_is_loop = 1; 650 } 651 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 652 sctp_ifap->src_is_priv = 1; 653 } 654 sctp_ifnp->num_v6++; 655 if (new_ifn_af) 656 new_ifn_af = AF_INET6; 657 break; 658 } 659 #endif 660 default: 661 new_ifn_af = 0; 662 break; 663 } 664 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 665 666 if ((sctp_ifap->src_is_priv == 0) && 667 (sctp_ifap->src_is_loop == 0)) { 668 sctp_ifap->src_is_glob = 1; 669 } 670 SCTP_IPI_ADDR_WLOCK(); 671 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 672 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 673 sctp_ifap->refcount = 1; 674 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 675 sctp_ifnp->ifa_count++; 676 vrf->total_ifa_count++; 677 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 678 if (new_ifn_af) { 679 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 680 sctp_ifnp->registered_af = new_ifn_af; 681 } 682 SCTP_IPI_ADDR_WUNLOCK(); 683 if (dynamic_add) { 684 /* 685 * Bump up the refcount so that when the timer completes it 686 * will drop back down. 687 */ 688 struct sctp_laddr *wi; 689 690 atomic_add_int(&sctp_ifap->refcount, 1); 691 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 692 if (wi == NULL) { 693 /* 694 * Gak, what can we do? We have lost an address 695 * change can you say HOSED? 696 */ 697 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 698 /* Opps, must decrement the count */ 699 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 700 if_name); 701 return (NULL); 702 } 703 SCTP_INCR_LADDR_COUNT(); 704 bzero(wi, sizeof(*wi)); 705 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 706 wi->ifa = sctp_ifap; 707 wi->action = SCTP_ADD_IP_ADDRESS; 708 709 SCTP_WQ_ADDR_LOCK(); 710 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 711 SCTP_WQ_ADDR_UNLOCK(); 712 713 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 714 (struct sctp_inpcb *)NULL, 715 (struct sctp_tcb *)NULL, 716 (struct sctp_nets *)NULL); 717 } else { 718 /* it's ready for use */ 719 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 720 } 721 return (sctp_ifap); 722 } 723 724 void 725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 726 uint32_t ifn_index, const char *if_name) 727 { 728 struct sctp_vrf *vrf; 729 struct sctp_ifa *sctp_ifap = NULL; 730 731 SCTP_IPI_ADDR_WLOCK(); 732 vrf = sctp_find_vrf(vrf_id); 733 if (vrf == NULL) { 734 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 735 goto out_now; 736 } 737 #ifdef SCTP_DEBUG 738 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 739 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 740 #endif 741 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 742 if (sctp_ifap) { 743 /* Validate the delete */ 744 if (sctp_ifap->ifn_p) { 745 int valid = 0; 746 747 /*- 748 * The name has priority over the ifn_index 749 * if its given. We do this especially for 750 * panda who might recycle indexes fast. 751 */ 752 if (if_name) { 753 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 754 /* They match its a correct delete */ 755 valid = 1; 756 } 757 } 758 if (!valid) { 759 /* last ditch check ifn_index */ 760 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 761 valid = 1; 762 } 763 } 764 if (!valid) { 765 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 766 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 768 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 769 SCTP_IPI_ADDR_WUNLOCK(); 770 return; 771 } 772 } 773 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 774 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 775 /* 776 * We don't set the flag. This means that the structure will 777 * hang around in EP's that have bound specific to it until 778 * they close. This gives us TCP like behavior if someone 779 * removes an address (or for that matter adds it right 780 * back). 781 */ 782 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 783 vrf->total_ifa_count--; 784 LIST_REMOVE(sctp_ifap, next_bucket); 785 sctp_remove_ifa_from_ifn(sctp_ifap); 786 } 787 #ifdef SCTP_DEBUG 788 else { 789 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 790 ifn_index); 791 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 792 } 793 #endif 794 795 out_now: 796 SCTP_IPI_ADDR_WUNLOCK(); 797 if (sctp_ifap) { 798 struct sctp_laddr *wi; 799 800 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 801 if (wi == NULL) { 802 /* 803 * Gak, what can we do? We have lost an address 804 * change can you say HOSED? 805 */ 806 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 807 808 /* Oops, must decrement the count */ 809 sctp_free_ifa(sctp_ifap); 810 return; 811 } 812 SCTP_INCR_LADDR_COUNT(); 813 bzero(wi, sizeof(*wi)); 814 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 815 wi->ifa = sctp_ifap; 816 wi->action = SCTP_DEL_IP_ADDRESS; 817 SCTP_WQ_ADDR_LOCK(); 818 /* 819 * Should this really be a tailq? As it is we will process 820 * the newest first :-0 821 */ 822 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 823 SCTP_WQ_ADDR_UNLOCK(); 824 825 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 826 (struct sctp_inpcb *)NULL, 827 (struct sctp_tcb *)NULL, 828 (struct sctp_nets *)NULL); 829 } 830 return; 831 } 832 833 834 static int 835 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 836 { 837 int loopback_scope; 838 839 #if defined(INET) 840 int ipv4_local_scope, ipv4_addr_legal; 841 842 #endif 843 #if defined(INET6) 844 int local_scope, site_scope, ipv6_addr_legal; 845 846 #endif 847 struct sctp_vrf *vrf; 848 struct sctp_ifn *sctp_ifn; 849 struct sctp_ifa *sctp_ifa; 850 851 loopback_scope = stcb->asoc.scope.loopback_scope; 852 #if defined(INET) 853 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 854 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 855 #endif 856 #if defined(INET6) 857 local_scope = stcb->asoc.scope.local_scope; 858 site_scope = stcb->asoc.scope.site_scope; 859 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 860 #endif 861 862 SCTP_IPI_ADDR_RLOCK(); 863 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 864 if (vrf == NULL) { 865 /* no vrf, no addresses */ 866 SCTP_IPI_ADDR_RUNLOCK(); 867 return (0); 868 } 869 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 870 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 871 if ((loopback_scope == 0) && 872 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 873 continue; 874 } 875 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 876 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 877 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 878 /* 879 * We allow pending addresses, where 880 * we have sent an asconf-add to be 881 * considered valid. 882 */ 883 continue; 884 } 885 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 886 continue; 887 } 888 switch (sctp_ifa->address.sa.sa_family) { 889 #ifdef INET 890 case AF_INET: 891 if (ipv4_addr_legal) { 892 struct sockaddr_in *sin, 893 *rsin; 894 895 sin = &sctp_ifa->address.sin; 896 rsin = (struct sockaddr_in *)to; 897 if ((ipv4_local_scope == 0) && 898 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 899 continue; 900 } 901 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 902 &sin->sin_addr) != 0) { 903 continue; 904 } 905 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 906 SCTP_IPI_ADDR_RUNLOCK(); 907 return (1); 908 } 909 } 910 break; 911 #endif 912 #ifdef INET6 913 case AF_INET6: 914 if (ipv6_addr_legal) { 915 struct sockaddr_in6 *sin6, 916 *rsin6; 917 918 sin6 = &sctp_ifa->address.sin6; 919 rsin6 = (struct sockaddr_in6 *)to; 920 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 921 &sin6->sin6_addr) != 0) { 922 continue; 923 } 924 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 925 if (local_scope == 0) 926 continue; 927 if (sin6->sin6_scope_id == 0) { 928 if (sa6_recoverscope(sin6) != 0) 929 continue; 930 } 931 } 932 if ((site_scope == 0) && 933 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 934 continue; 935 } 936 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 937 SCTP_IPI_ADDR_RUNLOCK(); 938 return (1); 939 } 940 } 941 break; 942 #endif 943 default: 944 /* TSNH */ 945 break; 946 } 947 } 948 } 949 } else { 950 struct sctp_laddr *laddr; 951 952 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 953 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 954 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 955 continue; 956 } 957 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 958 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 959 /* 960 * We allow pending addresses, where we have 961 * sent an asconf-add to be considered 962 * valid. 963 */ 964 continue; 965 } 966 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 967 continue; 968 } 969 switch (to->sa_family) { 970 #ifdef INET 971 case AF_INET: 972 { 973 struct sockaddr_in *sin, *rsin; 974 975 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 976 rsin = (struct sockaddr_in *)to; 977 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 978 SCTP_IPI_ADDR_RUNLOCK(); 979 return (1); 980 } 981 break; 982 } 983 #endif 984 #ifdef INET6 985 case AF_INET6: 986 { 987 struct sockaddr_in6 *sin6, *rsin6; 988 989 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 990 rsin6 = (struct sockaddr_in6 *)to; 991 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 992 SCTP_IPI_ADDR_RUNLOCK(); 993 return (1); 994 } 995 break; 996 } 997 998 #endif 999 default: 1000 /* TSNH */ 1001 break; 1002 } 1003 1004 } 1005 } 1006 SCTP_IPI_ADDR_RUNLOCK(); 1007 return (0); 1008 } 1009 1010 1011 static struct sctp_tcb * 1012 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1013 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1014 { 1015 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1016 /* 1017 * If we support the TCP model, then we must now dig through to see 1018 * if we can find our endpoint in the list of tcp ep's. 1019 */ 1020 uint16_t lport, rport; 1021 struct sctppcbhead *ephead; 1022 struct sctp_inpcb *inp; 1023 struct sctp_laddr *laddr; 1024 struct sctp_tcb *stcb; 1025 struct sctp_nets *net; 1026 1027 if ((to == NULL) || (from == NULL)) { 1028 return (NULL); 1029 } 1030 switch (to->sa_family) { 1031 #ifdef INET 1032 case AF_INET: 1033 if (from->sa_family == AF_INET) { 1034 lport = ((struct sockaddr_in *)to)->sin_port; 1035 rport = ((struct sockaddr_in *)from)->sin_port; 1036 } else { 1037 return (NULL); 1038 } 1039 break; 1040 #endif 1041 #ifdef INET6 1042 case AF_INET6: 1043 if (from->sa_family == AF_INET6) { 1044 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1045 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1046 } else { 1047 return (NULL); 1048 } 1049 break; 1050 #endif 1051 default: 1052 return (NULL); 1053 } 1054 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1055 /* 1056 * Ok now for each of the guys in this bucket we must look and see: 1057 * - Does the remote port match. - Does there single association's 1058 * addresses match this address (to). If so we update p_ep to point 1059 * to this ep and return the tcb from it. 1060 */ 1061 LIST_FOREACH(inp, ephead, sctp_hash) { 1062 SCTP_INP_RLOCK(inp); 1063 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1064 SCTP_INP_RUNLOCK(inp); 1065 continue; 1066 } 1067 if (lport != inp->sctp_lport) { 1068 SCTP_INP_RUNLOCK(inp); 1069 continue; 1070 } 1071 switch (to->sa_family) { 1072 #ifdef INET 1073 case AF_INET: 1074 { 1075 struct sockaddr_in *sin; 1076 1077 sin = (struct sockaddr_in *)to; 1078 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1079 &sin->sin_addr) != 0) { 1080 SCTP_INP_RUNLOCK(inp); 1081 continue; 1082 } 1083 break; 1084 } 1085 #endif 1086 #ifdef INET6 1087 case AF_INET6: 1088 { 1089 struct sockaddr_in6 *sin6; 1090 1091 sin6 = (struct sockaddr_in6 *)to; 1092 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1093 &sin6->sin6_addr) != 0) { 1094 SCTP_INP_RUNLOCK(inp); 1095 continue; 1096 } 1097 break; 1098 } 1099 #endif 1100 default: 1101 SCTP_INP_RUNLOCK(inp); 1102 continue; 1103 } 1104 if (inp->def_vrf_id != vrf_id) { 1105 SCTP_INP_RUNLOCK(inp); 1106 continue; 1107 } 1108 /* check to see if the ep has one of the addresses */ 1109 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1110 /* We are NOT bound all, so look further */ 1111 int match = 0; 1112 1113 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1114 1115 if (laddr->ifa == NULL) { 1116 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 1117 continue; 1118 } 1119 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1120 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1121 continue; 1122 } 1123 if (laddr->ifa->address.sa.sa_family == 1124 to->sa_family) { 1125 /* see if it matches */ 1126 #ifdef INET 1127 if (from->sa_family == AF_INET) { 1128 struct sockaddr_in *intf_addr, 1129 *sin; 1130 1131 intf_addr = &laddr->ifa->address.sin; 1132 sin = (struct sockaddr_in *)to; 1133 if (sin->sin_addr.s_addr == 1134 intf_addr->sin_addr.s_addr) { 1135 match = 1; 1136 break; 1137 } 1138 } 1139 #endif 1140 #ifdef INET6 1141 if (from->sa_family == AF_INET6) { 1142 struct sockaddr_in6 *intf_addr6; 1143 struct sockaddr_in6 *sin6; 1144 1145 sin6 = (struct sockaddr_in6 *) 1146 to; 1147 intf_addr6 = &laddr->ifa->address.sin6; 1148 1149 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1150 intf_addr6)) { 1151 match = 1; 1152 break; 1153 } 1154 } 1155 #endif 1156 } 1157 } 1158 if (match == 0) { 1159 /* This endpoint does not have this address */ 1160 SCTP_INP_RUNLOCK(inp); 1161 continue; 1162 } 1163 } 1164 /* 1165 * Ok if we hit here the ep has the address, does it hold 1166 * the tcb? 1167 */ 1168 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1169 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1170 if (stcb == NULL) { 1171 SCTP_INP_RUNLOCK(inp); 1172 continue; 1173 } 1174 SCTP_TCB_LOCK(stcb); 1175 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1176 SCTP_TCB_UNLOCK(stcb); 1177 SCTP_INP_RUNLOCK(inp); 1178 continue; 1179 } 1180 if (stcb->rport != rport) { 1181 /* remote port does not match. */ 1182 SCTP_TCB_UNLOCK(stcb); 1183 SCTP_INP_RUNLOCK(inp); 1184 continue; 1185 } 1186 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1187 SCTP_TCB_UNLOCK(stcb); 1188 SCTP_INP_RUNLOCK(inp); 1189 continue; 1190 } 1191 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1192 SCTP_TCB_UNLOCK(stcb); 1193 SCTP_INP_RUNLOCK(inp); 1194 continue; 1195 } 1196 /* Does this TCB have a matching address? */ 1197 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1198 1199 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1200 /* not the same family, can't be a match */ 1201 continue; 1202 } 1203 switch (from->sa_family) { 1204 #ifdef INET 1205 case AF_INET: 1206 { 1207 struct sockaddr_in *sin, *rsin; 1208 1209 sin = (struct sockaddr_in *)&net->ro._l_addr; 1210 rsin = (struct sockaddr_in *)from; 1211 if (sin->sin_addr.s_addr == 1212 rsin->sin_addr.s_addr) { 1213 /* found it */ 1214 if (netp != NULL) { 1215 *netp = net; 1216 } 1217 /* 1218 * Update the endpoint 1219 * pointer 1220 */ 1221 *inp_p = inp; 1222 SCTP_INP_RUNLOCK(inp); 1223 return (stcb); 1224 } 1225 break; 1226 } 1227 #endif 1228 #ifdef INET6 1229 case AF_INET6: 1230 { 1231 struct sockaddr_in6 *sin6, *rsin6; 1232 1233 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1234 rsin6 = (struct sockaddr_in6 *)from; 1235 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1236 rsin6)) { 1237 /* found it */ 1238 if (netp != NULL) { 1239 *netp = net; 1240 } 1241 /* 1242 * Update the endpoint 1243 * pointer 1244 */ 1245 *inp_p = inp; 1246 SCTP_INP_RUNLOCK(inp); 1247 return (stcb); 1248 } 1249 break; 1250 } 1251 #endif 1252 default: 1253 /* TSNH */ 1254 break; 1255 } 1256 } 1257 SCTP_TCB_UNLOCK(stcb); 1258 SCTP_INP_RUNLOCK(inp); 1259 } 1260 return (NULL); 1261 } 1262 1263 1264 /* 1265 * rules for use 1266 * 1267 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1268 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1269 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1270 * NULL. 1271 */ 1272 1273 struct sctp_tcb * 1274 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1275 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1276 { 1277 struct sctpasochead *head; 1278 struct sctp_inpcb *inp; 1279 struct sctp_tcb *stcb = NULL; 1280 struct sctp_nets *net; 1281 uint16_t rport; 1282 1283 inp = *inp_p; 1284 switch (remote->sa_family) { 1285 #ifdef INET 1286 case AF_INET: 1287 rport = (((struct sockaddr_in *)remote)->sin_port); 1288 break; 1289 #endif 1290 #ifdef INET6 1291 case AF_INET6: 1292 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1293 break; 1294 #endif 1295 default: 1296 return (NULL); 1297 } 1298 if (locked_tcb) { 1299 /* 1300 * UN-lock so we can do proper locking here this occurs when 1301 * called from load_addresses_from_init. 1302 */ 1303 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1304 SCTP_TCB_UNLOCK(locked_tcb); 1305 } 1306 SCTP_INP_INFO_RLOCK(); 1307 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1308 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1309 /*- 1310 * Now either this guy is our listener or it's the 1311 * connector. If it is the one that issued the connect, then 1312 * it's only chance is to be the first TCB in the list. If 1313 * it is the acceptor, then do the special_lookup to hash 1314 * and find the real inp. 1315 */ 1316 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1317 /* to is peer addr, from is my addr */ 1318 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1319 netp, inp->def_vrf_id); 1320 if ((stcb != NULL) && (locked_tcb == NULL)) { 1321 /* we have a locked tcb, lower refcount */ 1322 SCTP_INP_DECR_REF(inp); 1323 } 1324 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1325 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1326 SCTP_TCB_LOCK(locked_tcb); 1327 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1328 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1329 } 1330 SCTP_INP_INFO_RUNLOCK(); 1331 return (stcb); 1332 } else { 1333 SCTP_INP_WLOCK(inp); 1334 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1335 goto null_return; 1336 } 1337 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1338 if (stcb == NULL) { 1339 goto null_return; 1340 } 1341 SCTP_TCB_LOCK(stcb); 1342 1343 if (stcb->rport != rport) { 1344 /* remote port does not match. */ 1345 SCTP_TCB_UNLOCK(stcb); 1346 goto null_return; 1347 } 1348 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1349 SCTP_TCB_UNLOCK(stcb); 1350 goto null_return; 1351 } 1352 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1353 SCTP_TCB_UNLOCK(stcb); 1354 goto null_return; 1355 } 1356 /* now look at the list of remote addresses */ 1357 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1358 #ifdef INVARIANTS 1359 if (net == (TAILQ_NEXT(net, sctp_next))) { 1360 panic("Corrupt net list"); 1361 } 1362 #endif 1363 if (net->ro._l_addr.sa.sa_family != 1364 remote->sa_family) { 1365 /* not the same family */ 1366 continue; 1367 } 1368 switch (remote->sa_family) { 1369 #ifdef INET 1370 case AF_INET: 1371 { 1372 struct sockaddr_in *sin, 1373 *rsin; 1374 1375 sin = (struct sockaddr_in *) 1376 &net->ro._l_addr; 1377 rsin = (struct sockaddr_in *)remote; 1378 if (sin->sin_addr.s_addr == 1379 rsin->sin_addr.s_addr) { 1380 /* found it */ 1381 if (netp != NULL) { 1382 *netp = net; 1383 } 1384 if (locked_tcb == NULL) { 1385 SCTP_INP_DECR_REF(inp); 1386 } else if (locked_tcb != stcb) { 1387 SCTP_TCB_LOCK(locked_tcb); 1388 } 1389 if (locked_tcb) { 1390 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1391 } 1392 SCTP_INP_WUNLOCK(inp); 1393 SCTP_INP_INFO_RUNLOCK(); 1394 return (stcb); 1395 } 1396 break; 1397 } 1398 #endif 1399 #ifdef INET6 1400 case AF_INET6: 1401 { 1402 struct sockaddr_in6 *sin6, 1403 *rsin6; 1404 1405 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1406 rsin6 = (struct sockaddr_in6 *)remote; 1407 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1408 rsin6)) { 1409 /* found it */ 1410 if (netp != NULL) { 1411 *netp = net; 1412 } 1413 if (locked_tcb == NULL) { 1414 SCTP_INP_DECR_REF(inp); 1415 } else if (locked_tcb != stcb) { 1416 SCTP_TCB_LOCK(locked_tcb); 1417 } 1418 if (locked_tcb) { 1419 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1420 } 1421 SCTP_INP_WUNLOCK(inp); 1422 SCTP_INP_INFO_RUNLOCK(); 1423 return (stcb); 1424 } 1425 break; 1426 } 1427 #endif 1428 default: 1429 /* TSNH */ 1430 break; 1431 } 1432 } 1433 SCTP_TCB_UNLOCK(stcb); 1434 } 1435 } else { 1436 SCTP_INP_WLOCK(inp); 1437 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1438 goto null_return; 1439 } 1440 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1441 inp->sctp_hashmark)]; 1442 if (head == NULL) { 1443 goto null_return; 1444 } 1445 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1446 if (stcb->rport != rport) { 1447 /* remote port does not match */ 1448 continue; 1449 } 1450 SCTP_TCB_LOCK(stcb); 1451 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1452 SCTP_TCB_UNLOCK(stcb); 1453 continue; 1454 } 1455 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1456 SCTP_TCB_UNLOCK(stcb); 1457 continue; 1458 } 1459 /* now look at the list of remote addresses */ 1460 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1461 #ifdef INVARIANTS 1462 if (net == (TAILQ_NEXT(net, sctp_next))) { 1463 panic("Corrupt net list"); 1464 } 1465 #endif 1466 if (net->ro._l_addr.sa.sa_family != 1467 remote->sa_family) { 1468 /* not the same family */ 1469 continue; 1470 } 1471 switch (remote->sa_family) { 1472 #ifdef INET 1473 case AF_INET: 1474 { 1475 struct sockaddr_in *sin, 1476 *rsin; 1477 1478 sin = (struct sockaddr_in *) 1479 &net->ro._l_addr; 1480 rsin = (struct sockaddr_in *)remote; 1481 if (sin->sin_addr.s_addr == 1482 rsin->sin_addr.s_addr) { 1483 /* found it */ 1484 if (netp != NULL) { 1485 *netp = net; 1486 } 1487 if (locked_tcb == NULL) { 1488 SCTP_INP_DECR_REF(inp); 1489 } else if (locked_tcb != stcb) { 1490 SCTP_TCB_LOCK(locked_tcb); 1491 } 1492 if (locked_tcb) { 1493 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1494 } 1495 SCTP_INP_WUNLOCK(inp); 1496 SCTP_INP_INFO_RUNLOCK(); 1497 return (stcb); 1498 } 1499 break; 1500 } 1501 #endif 1502 #ifdef INET6 1503 case AF_INET6: 1504 { 1505 struct sockaddr_in6 *sin6, 1506 *rsin6; 1507 1508 sin6 = (struct sockaddr_in6 *) 1509 &net->ro._l_addr; 1510 rsin6 = (struct sockaddr_in6 *)remote; 1511 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1512 rsin6)) { 1513 /* found it */ 1514 if (netp != NULL) { 1515 *netp = net; 1516 } 1517 if (locked_tcb == NULL) { 1518 SCTP_INP_DECR_REF(inp); 1519 } else if (locked_tcb != stcb) { 1520 SCTP_TCB_LOCK(locked_tcb); 1521 } 1522 if (locked_tcb) { 1523 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1524 } 1525 SCTP_INP_WUNLOCK(inp); 1526 SCTP_INP_INFO_RUNLOCK(); 1527 return (stcb); 1528 } 1529 break; 1530 } 1531 #endif 1532 default: 1533 /* TSNH */ 1534 break; 1535 } 1536 } 1537 SCTP_TCB_UNLOCK(stcb); 1538 } 1539 } 1540 null_return: 1541 /* clean up for returning null */ 1542 if (locked_tcb) { 1543 SCTP_TCB_LOCK(locked_tcb); 1544 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1545 } 1546 SCTP_INP_WUNLOCK(inp); 1547 SCTP_INP_INFO_RUNLOCK(); 1548 /* not found */ 1549 return (NULL); 1550 } 1551 1552 1553 /* 1554 * Find an association for a specific endpoint using the association id given 1555 * out in the COMM_UP notification 1556 */ 1557 struct sctp_tcb * 1558 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1559 { 1560 /* 1561 * Use my the assoc_id to find a endpoint 1562 */ 1563 struct sctpasochead *head; 1564 struct sctp_tcb *stcb; 1565 uint32_t id; 1566 1567 if (inp == NULL) { 1568 SCTP_PRINTF("TSNH ep_associd\n"); 1569 return (NULL); 1570 } 1571 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1572 SCTP_PRINTF("TSNH ep_associd0\n"); 1573 return (NULL); 1574 } 1575 id = (uint32_t) asoc_id; 1576 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1577 if (head == NULL) { 1578 /* invalid id TSNH */ 1579 SCTP_PRINTF("TSNH ep_associd1\n"); 1580 return (NULL); 1581 } 1582 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1583 if (stcb->asoc.assoc_id == id) { 1584 if (inp != stcb->sctp_ep) { 1585 /* 1586 * some other guy has the same id active (id 1587 * collision ??). 1588 */ 1589 SCTP_PRINTF("TSNH ep_associd2\n"); 1590 continue; 1591 } 1592 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1593 continue; 1594 } 1595 if (want_lock) { 1596 SCTP_TCB_LOCK(stcb); 1597 } 1598 return (stcb); 1599 } 1600 } 1601 return (NULL); 1602 } 1603 1604 1605 struct sctp_tcb * 1606 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1607 { 1608 struct sctp_tcb *stcb; 1609 1610 SCTP_INP_RLOCK(inp); 1611 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1612 SCTP_INP_RUNLOCK(inp); 1613 return (stcb); 1614 } 1615 1616 1617 /* 1618 * Endpoint probe expects that the INP_INFO is locked. 1619 */ 1620 static struct sctp_inpcb * 1621 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1622 uint16_t lport, uint32_t vrf_id) 1623 { 1624 struct sctp_inpcb *inp; 1625 struct sctp_laddr *laddr; 1626 1627 #ifdef INET 1628 struct sockaddr_in *sin; 1629 1630 #endif 1631 #ifdef INET6 1632 struct sockaddr_in6 *sin6; 1633 struct sockaddr_in6 *intf_addr6; 1634 1635 #endif 1636 int fnd; 1637 1638 #ifdef INET 1639 sin = NULL; 1640 #endif 1641 #ifdef INET6 1642 sin6 = NULL; 1643 #endif 1644 switch (nam->sa_family) { 1645 #ifdef INET 1646 case AF_INET: 1647 sin = (struct sockaddr_in *)nam; 1648 break; 1649 #endif 1650 #ifdef INET6 1651 case AF_INET6: 1652 sin6 = (struct sockaddr_in6 *)nam; 1653 break; 1654 #endif 1655 default: 1656 /* unsupported family */ 1657 return (NULL); 1658 } 1659 1660 if (head == NULL) 1661 return (NULL); 1662 1663 LIST_FOREACH(inp, head, sctp_hash) { 1664 SCTP_INP_RLOCK(inp); 1665 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1666 SCTP_INP_RUNLOCK(inp); 1667 continue; 1668 } 1669 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1670 (inp->sctp_lport == lport)) { 1671 /* got it */ 1672 switch (nam->sa_family) { 1673 #ifdef INET 1674 case AF_INET: 1675 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1676 SCTP_IPV6_V6ONLY(inp)) { 1677 /* 1678 * IPv4 on a IPv6 socket with ONLY 1679 * IPv6 set 1680 */ 1681 SCTP_INP_RUNLOCK(inp); 1682 continue; 1683 } 1684 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1685 &sin->sin_addr) != 0) { 1686 SCTP_INP_RUNLOCK(inp); 1687 continue; 1688 } 1689 break; 1690 #endif 1691 #ifdef INET6 1692 case AF_INET6: 1693 /* 1694 * A V6 address and the endpoint is NOT 1695 * bound V6 1696 */ 1697 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1698 SCTP_INP_RUNLOCK(inp); 1699 continue; 1700 } 1701 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1702 &sin6->sin6_addr) != 0) { 1703 SCTP_INP_RUNLOCK(inp); 1704 continue; 1705 } 1706 break; 1707 #endif 1708 default: 1709 break; 1710 } 1711 /* does a VRF id match? */ 1712 fnd = 0; 1713 if (inp->def_vrf_id == vrf_id) 1714 fnd = 1; 1715 1716 SCTP_INP_RUNLOCK(inp); 1717 if (!fnd) 1718 continue; 1719 return (inp); 1720 } 1721 SCTP_INP_RUNLOCK(inp); 1722 } 1723 switch (nam->sa_family) { 1724 #ifdef INET 1725 case AF_INET: 1726 if (sin->sin_addr.s_addr == INADDR_ANY) { 1727 /* Can't hunt for one that has no address specified */ 1728 return (NULL); 1729 } 1730 break; 1731 #endif 1732 #ifdef INET6 1733 case AF_INET6: 1734 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1735 /* Can't hunt for one that has no address specified */ 1736 return (NULL); 1737 } 1738 break; 1739 #endif 1740 default: 1741 break; 1742 } 1743 /* 1744 * ok, not bound to all so see if we can find a EP bound to this 1745 * address. 1746 */ 1747 LIST_FOREACH(inp, head, sctp_hash) { 1748 SCTP_INP_RLOCK(inp); 1749 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1750 SCTP_INP_RUNLOCK(inp); 1751 continue; 1752 } 1753 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1754 SCTP_INP_RUNLOCK(inp); 1755 continue; 1756 } 1757 /* 1758 * Ok this could be a likely candidate, look at all of its 1759 * addresses 1760 */ 1761 if (inp->sctp_lport != lport) { 1762 SCTP_INP_RUNLOCK(inp); 1763 continue; 1764 } 1765 /* does a VRF id match? */ 1766 fnd = 0; 1767 if (inp->def_vrf_id == vrf_id) 1768 fnd = 1; 1769 1770 if (!fnd) { 1771 SCTP_INP_RUNLOCK(inp); 1772 continue; 1773 } 1774 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1775 if (laddr->ifa == NULL) { 1776 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1777 __FUNCTION__); 1778 continue; 1779 } 1780 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1781 (void *)laddr->ifa); 1782 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1783 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1784 continue; 1785 } 1786 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1787 /* possible, see if it matches */ 1788 switch (nam->sa_family) { 1789 #ifdef INET 1790 case AF_INET: 1791 if (sin->sin_addr.s_addr == 1792 laddr->ifa->address.sin.sin_addr.s_addr) { 1793 SCTP_INP_RUNLOCK(inp); 1794 return (inp); 1795 } 1796 break; 1797 #endif 1798 #ifdef INET6 1799 case AF_INET6: 1800 intf_addr6 = &laddr->ifa->address.sin6; 1801 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1802 intf_addr6)) { 1803 SCTP_INP_RUNLOCK(inp); 1804 return (inp); 1805 } 1806 break; 1807 #endif 1808 } 1809 } 1810 } 1811 SCTP_INP_RUNLOCK(inp); 1812 } 1813 return (NULL); 1814 } 1815 1816 1817 static struct sctp_inpcb * 1818 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1819 { 1820 struct sctppcbhead *head; 1821 struct sctp_inpcb *t_inp; 1822 int fnd; 1823 1824 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1825 SCTP_BASE_INFO(hashmark))]; 1826 LIST_FOREACH(t_inp, head, sctp_hash) { 1827 if (t_inp->sctp_lport != lport) { 1828 continue; 1829 } 1830 /* is it in the VRF in question */ 1831 fnd = 0; 1832 if (t_inp->def_vrf_id == vrf_id) 1833 fnd = 1; 1834 if (!fnd) 1835 continue; 1836 1837 /* This one is in use. */ 1838 /* check the v6/v4 binding issue */ 1839 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1840 SCTP_IPV6_V6ONLY(t_inp)) { 1841 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1842 /* collision in V6 space */ 1843 return (t_inp); 1844 } else { 1845 /* inp is BOUND_V4 no conflict */ 1846 continue; 1847 } 1848 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1849 /* t_inp is bound v4 and v6, conflict always */ 1850 return (t_inp); 1851 } else { 1852 /* t_inp is bound only V4 */ 1853 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1854 SCTP_IPV6_V6ONLY(inp)) { 1855 /* no conflict */ 1856 continue; 1857 } 1858 /* else fall through to conflict */ 1859 } 1860 return (t_inp); 1861 } 1862 return (NULL); 1863 } 1864 1865 1866 int 1867 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1868 { 1869 /* For 1-2-1 with port reuse */ 1870 struct sctppcbhead *head; 1871 struct sctp_inpcb *tinp; 1872 1873 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1874 /* only works with port reuse on */ 1875 return (-1); 1876 } 1877 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1878 return (0); 1879 } 1880 SCTP_INP_RUNLOCK(inp); 1881 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1882 SCTP_BASE_INFO(hashmark))]; 1883 /* Kick out all non-listeners to the TCP hash */ 1884 LIST_FOREACH(tinp, head, sctp_hash) { 1885 if (tinp->sctp_lport != inp->sctp_lport) { 1886 continue; 1887 } 1888 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1889 continue; 1890 } 1891 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1892 continue; 1893 } 1894 if (tinp->sctp_socket->so_qlimit) { 1895 continue; 1896 } 1897 SCTP_INP_WLOCK(tinp); 1898 LIST_REMOVE(tinp, sctp_hash); 1899 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1900 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1901 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1902 SCTP_INP_WUNLOCK(tinp); 1903 } 1904 SCTP_INP_WLOCK(inp); 1905 /* Pull from where he was */ 1906 LIST_REMOVE(inp, sctp_hash); 1907 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1908 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1909 LIST_INSERT_HEAD(head, inp, sctp_hash); 1910 SCTP_INP_WUNLOCK(inp); 1911 SCTP_INP_RLOCK(inp); 1912 return (0); 1913 } 1914 1915 1916 struct sctp_inpcb * 1917 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1918 uint32_t vrf_id) 1919 { 1920 /* 1921 * First we check the hash table to see if someone has this port 1922 * bound with just the port. 1923 */ 1924 struct sctp_inpcb *inp; 1925 struct sctppcbhead *head; 1926 int lport; 1927 unsigned int i; 1928 1929 #ifdef INET 1930 struct sockaddr_in *sin; 1931 1932 #endif 1933 #ifdef INET6 1934 struct sockaddr_in6 *sin6; 1935 1936 #endif 1937 1938 switch (nam->sa_family) { 1939 #ifdef INET 1940 case AF_INET: 1941 sin = (struct sockaddr_in *)nam; 1942 lport = sin->sin_port; 1943 break; 1944 #endif 1945 #ifdef INET6 1946 case AF_INET6: 1947 sin6 = (struct sockaddr_in6 *)nam; 1948 lport = sin6->sin6_port; 1949 break; 1950 #endif 1951 default: 1952 return (NULL); 1953 } 1954 /* 1955 * I could cheat here and just cast to one of the types but we will 1956 * do it right. It also provides the check against an Unsupported 1957 * type too. 1958 */ 1959 /* Find the head of the ALLADDR chain */ 1960 if (have_lock == 0) { 1961 SCTP_INP_INFO_RLOCK(); 1962 } 1963 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1964 SCTP_BASE_INFO(hashmark))]; 1965 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1966 1967 /* 1968 * If the TCP model exists it could be that the main listening 1969 * endpoint is gone but there still exists a connected socket for 1970 * this guy. If so we can return the first one that we find. This 1971 * may NOT be the correct one so the caller should be wary on the 1972 * returned INP. Currently the only caller that sets find_tcp_pool 1973 * is in bindx where we are verifying that a user CAN bind the 1974 * address. He either has bound it already, or someone else has, or 1975 * its open to bind, so this is good enough. 1976 */ 1977 if (inp == NULL && find_tcp_pool) { 1978 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1979 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1980 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1981 if (inp) { 1982 break; 1983 } 1984 } 1985 } 1986 if (inp) { 1987 SCTP_INP_INCR_REF(inp); 1988 } 1989 if (have_lock == 0) { 1990 SCTP_INP_INFO_RUNLOCK(); 1991 } 1992 return (inp); 1993 } 1994 1995 1996 /* 1997 * Find an association for an endpoint with the pointer to whom you want to 1998 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1999 * need to change the *to to some other struct like a mbuf... 2000 */ 2001 struct sctp_tcb * 2002 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2003 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2004 uint32_t vrf_id) 2005 { 2006 struct sctp_inpcb *inp = NULL; 2007 struct sctp_tcb *stcb; 2008 2009 SCTP_INP_INFO_RLOCK(); 2010 if (find_tcp_pool) { 2011 if (inp_p != NULL) { 2012 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2013 vrf_id); 2014 } else { 2015 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2016 vrf_id); 2017 } 2018 if (stcb != NULL) { 2019 SCTP_INP_INFO_RUNLOCK(); 2020 return (stcb); 2021 } 2022 } 2023 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2024 if (inp_p != NULL) { 2025 *inp_p = inp; 2026 } 2027 SCTP_INP_INFO_RUNLOCK(); 2028 if (inp == NULL) { 2029 return (NULL); 2030 } 2031 /* 2032 * ok, we have an endpoint, now lets find the assoc for it (if any) 2033 * we now place the source address or from in the to of the find 2034 * endpoint call. Since in reality this chain is used from the 2035 * inbound packet side. 2036 */ 2037 if (inp_p != NULL) { 2038 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2039 NULL); 2040 } else { 2041 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2042 NULL); 2043 } 2044 return (stcb); 2045 } 2046 2047 2048 /* 2049 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2050 * find all addresses that the sender has specified in any address list. Each 2051 * address will be used to lookup the TCB and see if one exits. 2052 */ 2053 static struct sctp_tcb * 2054 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2055 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2056 struct sockaddr *dst) 2057 { 2058 struct sctp_paramhdr *phdr, parm_buf; 2059 2060 #if defined(INET) || defined(INET6) 2061 struct sctp_tcb *stcb; 2062 uint16_t ptype; 2063 2064 #endif 2065 uint16_t plen; 2066 2067 #ifdef INET 2068 struct sockaddr_in sin4; 2069 2070 #endif 2071 #ifdef INET6 2072 struct sockaddr_in6 sin6; 2073 2074 #endif 2075 2076 #ifdef INET 2077 memset(&sin4, 0, sizeof(sin4)); 2078 sin4.sin_len = sizeof(sin4); 2079 sin4.sin_family = AF_INET; 2080 sin4.sin_port = sh->src_port; 2081 #endif 2082 #ifdef INET6 2083 memset(&sin6, 0, sizeof(sin6)); 2084 sin6.sin6_len = sizeof(sin6); 2085 sin6.sin6_family = AF_INET6; 2086 sin6.sin6_port = sh->src_port; 2087 #endif 2088 2089 offset += sizeof(struct sctp_init_chunk); 2090 2091 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2092 while (phdr != NULL) { 2093 /* now we must see if we want the parameter */ 2094 #if defined(INET) || defined(INET6) 2095 ptype = ntohs(phdr->param_type); 2096 #endif 2097 plen = ntohs(phdr->param_length); 2098 if (plen == 0) { 2099 break; 2100 } 2101 #ifdef INET 2102 if (ptype == SCTP_IPV4_ADDRESS && 2103 plen == sizeof(struct sctp_ipv4addr_param)) { 2104 /* Get the rest of the address */ 2105 struct sctp_ipv4addr_param ip4_parm, *p4; 2106 2107 phdr = sctp_get_next_param(m, offset, 2108 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2109 if (phdr == NULL) { 2110 return (NULL); 2111 } 2112 p4 = (struct sctp_ipv4addr_param *)phdr; 2113 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2114 /* look it up */ 2115 stcb = sctp_findassociation_ep_addr(inp_p, 2116 (struct sockaddr *)&sin4, netp, dst, NULL); 2117 if (stcb != NULL) { 2118 return (stcb); 2119 } 2120 } 2121 #endif 2122 #ifdef INET6 2123 if (ptype == SCTP_IPV6_ADDRESS && 2124 plen == sizeof(struct sctp_ipv6addr_param)) { 2125 /* Get the rest of the address */ 2126 struct sctp_ipv6addr_param ip6_parm, *p6; 2127 2128 phdr = sctp_get_next_param(m, offset, 2129 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2130 if (phdr == NULL) { 2131 return (NULL); 2132 } 2133 p6 = (struct sctp_ipv6addr_param *)phdr; 2134 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2135 /* look it up */ 2136 stcb = sctp_findassociation_ep_addr(inp_p, 2137 (struct sockaddr *)&sin6, netp, dst, NULL); 2138 if (stcb != NULL) { 2139 return (stcb); 2140 } 2141 } 2142 #endif 2143 offset += SCTP_SIZE32(plen); 2144 phdr = sctp_get_next_param(m, offset, &parm_buf, 2145 sizeof(parm_buf)); 2146 } 2147 return (NULL); 2148 } 2149 2150 static struct sctp_tcb * 2151 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2152 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2153 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2154 { 2155 /* 2156 * Use my vtag to hash. If we find it we then verify the source addr 2157 * is in the assoc. If all goes well we save a bit on rec of a 2158 * packet. 2159 */ 2160 struct sctpasochead *head; 2161 struct sctp_nets *net; 2162 struct sctp_tcb *stcb; 2163 2164 SCTP_INP_INFO_RLOCK(); 2165 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2166 SCTP_BASE_INFO(hashasocmark))]; 2167 if (head == NULL) { 2168 /* invalid vtag */ 2169 SCTP_INP_INFO_RUNLOCK(); 2170 return (NULL); 2171 } 2172 LIST_FOREACH(stcb, head, sctp_asocs) { 2173 SCTP_INP_RLOCK(stcb->sctp_ep); 2174 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2175 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2176 continue; 2177 } 2178 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2179 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2180 continue; 2181 } 2182 SCTP_TCB_LOCK(stcb); 2183 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2184 if (stcb->asoc.my_vtag == vtag) { 2185 /* candidate */ 2186 if (stcb->rport != rport) { 2187 SCTP_TCB_UNLOCK(stcb); 2188 continue; 2189 } 2190 if (stcb->sctp_ep->sctp_lport != lport) { 2191 SCTP_TCB_UNLOCK(stcb); 2192 continue; 2193 } 2194 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2195 SCTP_TCB_UNLOCK(stcb); 2196 continue; 2197 } 2198 /* RRS:Need toaddr check here */ 2199 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2200 /* Endpoint does not own this address */ 2201 SCTP_TCB_UNLOCK(stcb); 2202 continue; 2203 } 2204 if (remote_tag) { 2205 /* 2206 * If we have both vtags that's all we match 2207 * on 2208 */ 2209 if (stcb->asoc.peer_vtag == remote_tag) { 2210 /* 2211 * If both tags match we consider it 2212 * conclusive and check NO 2213 * source/destination addresses 2214 */ 2215 goto conclusive; 2216 } 2217 } 2218 if (skip_src_check) { 2219 conclusive: 2220 if (from) { 2221 *netp = sctp_findnet(stcb, from); 2222 } else { 2223 *netp = NULL; /* unknown */ 2224 } 2225 if (inp_p) 2226 *inp_p = stcb->sctp_ep; 2227 SCTP_INP_INFO_RUNLOCK(); 2228 return (stcb); 2229 } 2230 net = sctp_findnet(stcb, from); 2231 if (net) { 2232 /* yep its him. */ 2233 *netp = net; 2234 SCTP_STAT_INCR(sctps_vtagexpress); 2235 *inp_p = stcb->sctp_ep; 2236 SCTP_INP_INFO_RUNLOCK(); 2237 return (stcb); 2238 } else { 2239 /* 2240 * not him, this should only happen in rare 2241 * cases so I peg it. 2242 */ 2243 SCTP_STAT_INCR(sctps_vtagbogus); 2244 } 2245 } 2246 SCTP_TCB_UNLOCK(stcb); 2247 } 2248 SCTP_INP_INFO_RUNLOCK(); 2249 return (NULL); 2250 } 2251 2252 2253 /* 2254 * Find an association with the pointer to the inbound IP packet. This can be 2255 * a IPv4 or IPv6 packet. 2256 */ 2257 struct sctp_tcb * 2258 sctp_findassociation_addr(struct mbuf *m, int offset, 2259 struct sockaddr *src, struct sockaddr *dst, 2260 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2261 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2262 { 2263 int find_tcp_pool; 2264 struct sctp_tcb *stcb; 2265 struct sctp_inpcb *inp; 2266 2267 if (sh->v_tag) { 2268 /* we only go down this path if vtag is non-zero */ 2269 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2270 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2271 if (stcb) { 2272 return (stcb); 2273 } 2274 } 2275 find_tcp_pool = 0; 2276 if ((ch->chunk_type != SCTP_INITIATION) && 2277 (ch->chunk_type != SCTP_INITIATION_ACK) && 2278 (ch->chunk_type != SCTP_COOKIE_ACK) && 2279 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2280 /* Other chunk types go to the tcp pool. */ 2281 find_tcp_pool = 1; 2282 } 2283 if (inp_p) { 2284 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2285 find_tcp_pool, vrf_id); 2286 inp = *inp_p; 2287 } else { 2288 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2289 find_tcp_pool, vrf_id); 2290 } 2291 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2292 if (stcb == NULL && inp) { 2293 /* Found a EP but not this address */ 2294 if ((ch->chunk_type == SCTP_INITIATION) || 2295 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2296 /*- 2297 * special hook, we do NOT return linp or an 2298 * association that is linked to an existing 2299 * association that is under the TCP pool (i.e. no 2300 * listener exists). The endpoint finding routine 2301 * will always find a listener before examining the 2302 * TCP pool. 2303 */ 2304 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2305 if (inp_p) { 2306 *inp_p = NULL; 2307 } 2308 return (NULL); 2309 } 2310 stcb = sctp_findassociation_special_addr(m, 2311 offset, sh, &inp, netp, dst); 2312 if (inp_p != NULL) { 2313 *inp_p = inp; 2314 } 2315 } 2316 } 2317 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2318 return (stcb); 2319 } 2320 2321 /* 2322 * lookup an association by an ASCONF lookup address. 2323 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2324 */ 2325 struct sctp_tcb * 2326 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2327 struct sockaddr *dst, struct sctphdr *sh, 2328 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2329 { 2330 struct sctp_tcb *stcb; 2331 struct sockaddr_storage remote_store; 2332 struct sctp_paramhdr parm_buf, *phdr; 2333 int ptype; 2334 int zero_address = 0; 2335 2336 #ifdef INET 2337 struct sockaddr_in *sin; 2338 2339 #endif 2340 #ifdef INET6 2341 struct sockaddr_in6 *sin6; 2342 2343 #endif 2344 2345 memset(&remote_store, 0, sizeof(remote_store)); 2346 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2347 &parm_buf, sizeof(struct sctp_paramhdr)); 2348 if (phdr == NULL) { 2349 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2350 __FUNCTION__); 2351 return NULL; 2352 } 2353 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2354 /* get the correlation address */ 2355 switch (ptype) { 2356 #ifdef INET6 2357 case SCTP_IPV6_ADDRESS: 2358 { 2359 /* ipv6 address param */ 2360 struct sctp_ipv6addr_param *p6, p6_buf; 2361 2362 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2363 return NULL; 2364 } 2365 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2366 offset + sizeof(struct sctp_asconf_chunk), 2367 &p6_buf.ph, sizeof(*p6)); 2368 if (p6 == NULL) { 2369 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2370 __FUNCTION__); 2371 return (NULL); 2372 } 2373 sin6 = (struct sockaddr_in6 *)&remote_store; 2374 sin6->sin6_family = AF_INET6; 2375 sin6->sin6_len = sizeof(*sin6); 2376 sin6->sin6_port = sh->src_port; 2377 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2378 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2379 zero_address = 1; 2380 break; 2381 } 2382 #endif 2383 #ifdef INET 2384 case SCTP_IPV4_ADDRESS: 2385 { 2386 /* ipv4 address param */ 2387 struct sctp_ipv4addr_param *p4, p4_buf; 2388 2389 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2390 return NULL; 2391 } 2392 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2393 offset + sizeof(struct sctp_asconf_chunk), 2394 &p4_buf.ph, sizeof(*p4)); 2395 if (p4 == NULL) { 2396 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2397 __FUNCTION__); 2398 return (NULL); 2399 } 2400 sin = (struct sockaddr_in *)&remote_store; 2401 sin->sin_family = AF_INET; 2402 sin->sin_len = sizeof(*sin); 2403 sin->sin_port = sh->src_port; 2404 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2405 if (sin->sin_addr.s_addr == INADDR_ANY) 2406 zero_address = 1; 2407 break; 2408 } 2409 #endif 2410 default: 2411 /* invalid address param type */ 2412 return NULL; 2413 } 2414 2415 if (zero_address) { 2416 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2417 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2418 if (stcb != NULL) { 2419 SCTP_INP_DECR_REF(*inp_p); 2420 } 2421 } else { 2422 stcb = sctp_findassociation_ep_addr(inp_p, 2423 (struct sockaddr *)&remote_store, netp, 2424 dst, NULL); 2425 } 2426 return (stcb); 2427 } 2428 2429 2430 /* 2431 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2432 * addresses. This way if we don't get a bind we by default pick a ephemeral 2433 * port with all addresses bound. 2434 */ 2435 int 2436 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2437 { 2438 /* 2439 * we get called when a new endpoint starts up. We need to allocate 2440 * the sctp_inpcb structure from the zone and init it. Mark it as 2441 * unbound and find a port that we can use as an ephemeral with 2442 * INADDR_ANY. If the user binds later no problem we can then add in 2443 * the specific addresses. And setup the default parameters for the 2444 * EP. 2445 */ 2446 int i, error; 2447 struct sctp_inpcb *inp; 2448 struct sctp_pcb *m; 2449 struct timeval time; 2450 sctp_sharedkey_t *null_key; 2451 2452 error = 0; 2453 2454 SCTP_INP_INFO_WLOCK(); 2455 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2456 if (inp == NULL) { 2457 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2458 SCTP_INP_INFO_WUNLOCK(); 2459 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2460 return (ENOBUFS); 2461 } 2462 /* zap it */ 2463 bzero(inp, sizeof(*inp)); 2464 2465 /* bump generations */ 2466 /* setup socket pointers */ 2467 inp->sctp_socket = so; 2468 inp->ip_inp.inp.inp_socket = so; 2469 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2470 #ifdef INET6 2471 if (INP_SOCKAF(so) == AF_INET6) { 2472 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2473 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2474 } 2475 if (MODULE_GLOBAL(ip6_v6only)) { 2476 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2477 } 2478 } 2479 #endif 2480 inp->sctp_associd_counter = 1; 2481 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2482 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2483 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2484 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2485 /* init the small hash table we use to track asocid <-> tcb */ 2486 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2487 if (inp->sctp_asocidhash == NULL) { 2488 crfree(inp->ip_inp.inp.inp_cred); 2489 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2490 SCTP_INP_INFO_WUNLOCK(); 2491 return (ENOBUFS); 2492 } 2493 #ifdef IPSEC 2494 { 2495 struct inpcbpolicy *pcb_sp = NULL; 2496 2497 error = ipsec_init_policy(so, &pcb_sp); 2498 /* Arrange to share the policy */ 2499 inp->ip_inp.inp.inp_sp = pcb_sp; 2500 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2501 } 2502 if (error != 0) { 2503 crfree(inp->ip_inp.inp.inp_cred); 2504 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2505 SCTP_INP_INFO_WUNLOCK(); 2506 return error; 2507 } 2508 #endif /* IPSEC */ 2509 SCTP_INCR_EP_COUNT(); 2510 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2511 SCTP_INP_INFO_WUNLOCK(); 2512 2513 so->so_pcb = (caddr_t)inp; 2514 2515 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2516 /* UDP style socket */ 2517 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2518 SCTP_PCB_FLAGS_UNBOUND); 2519 /* Be sure it is NON-BLOCKING IO for UDP */ 2520 /* SCTP_SET_SO_NBIO(so); */ 2521 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2522 /* TCP style socket */ 2523 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2524 SCTP_PCB_FLAGS_UNBOUND); 2525 /* Be sure we have blocking IO by default */ 2526 SCTP_CLEAR_SO_NBIO(so); 2527 } else { 2528 /* 2529 * unsupported socket type (RAW, etc)- in case we missed it 2530 * in protosw 2531 */ 2532 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2533 so->so_pcb = NULL; 2534 crfree(inp->ip_inp.inp.inp_cred); 2535 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2536 return (EOPNOTSUPP); 2537 } 2538 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2539 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2540 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2541 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2542 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2543 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2544 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2545 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2546 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2547 } 2548 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2549 &inp->sctp_hashmark); 2550 if (inp->sctp_tcbhash == NULL) { 2551 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2552 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2553 so->so_pcb = NULL; 2554 crfree(inp->ip_inp.inp.inp_cred); 2555 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2556 return (ENOBUFS); 2557 } 2558 inp->def_vrf_id = vrf_id; 2559 2560 SCTP_INP_INFO_WLOCK(); 2561 SCTP_INP_LOCK_INIT(inp); 2562 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2563 SCTP_INP_READ_INIT(inp); 2564 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2565 /* lock the new ep */ 2566 SCTP_INP_WLOCK(inp); 2567 2568 /* add it to the info area */ 2569 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2570 SCTP_INP_INFO_WUNLOCK(); 2571 2572 TAILQ_INIT(&inp->read_queue); 2573 LIST_INIT(&inp->sctp_addr_list); 2574 2575 LIST_INIT(&inp->sctp_asoc_list); 2576 2577 #ifdef SCTP_TRACK_FREED_ASOCS 2578 /* TEMP CODE */ 2579 LIST_INIT(&inp->sctp_asoc_free_list); 2580 #endif 2581 /* Init the timer structure for signature change */ 2582 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2583 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2584 2585 /* now init the actual endpoint default data */ 2586 m = &inp->sctp_ep; 2587 2588 /* setup the base timeout information */ 2589 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2590 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2591 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2592 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2593 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2594 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2595 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2596 /* all max/min max are in ms */ 2597 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2598 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2599 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2600 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2601 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2602 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2603 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2604 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2605 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2606 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2607 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2608 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2609 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2610 2611 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2612 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2613 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2614 /* number of streams to pre-open on a association */ 2615 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2616 2617 /* Add adaptation cookie */ 2618 m->adaptation_layer_indicator = 0; 2619 m->adaptation_layer_indicator_provided = 0; 2620 2621 /* seed random number generator */ 2622 m->random_counter = 1; 2623 m->store_at = SCTP_SIGNATURE_SIZE; 2624 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2625 sctp_fill_random_store(m); 2626 2627 /* Minimum cookie size */ 2628 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2629 sizeof(struct sctp_state_cookie); 2630 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2631 2632 /* Setup the initial secret */ 2633 (void)SCTP_GETTIME_TIMEVAL(&time); 2634 m->time_of_secret_change = time.tv_sec; 2635 2636 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2637 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2638 } 2639 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2640 2641 /* How long is a cookie good for ? */ 2642 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2643 /* 2644 * Initialize authentication parameters 2645 */ 2646 m->local_hmacs = sctp_default_supported_hmaclist(); 2647 m->local_auth_chunks = sctp_alloc_chunklist(); 2648 m->default_dscp = 0; 2649 #ifdef INET6 2650 m->default_flowlabel = 0; 2651 #endif 2652 m->port = 0; /* encapsulation disabled by default */ 2653 sctp_auth_set_default_chunks(m->local_auth_chunks); 2654 LIST_INIT(&m->shared_keys); 2655 /* add default NULL key as key id 0 */ 2656 null_key = sctp_alloc_sharedkey(); 2657 sctp_insert_sharedkey(&m->shared_keys, null_key); 2658 SCTP_INP_WUNLOCK(inp); 2659 #ifdef SCTP_LOG_CLOSING 2660 sctp_log_closing(inp, NULL, 12); 2661 #endif 2662 return (error); 2663 } 2664 2665 2666 void 2667 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2668 struct sctp_tcb *stcb) 2669 { 2670 struct sctp_nets *net; 2671 uint16_t lport, rport; 2672 struct sctppcbhead *head; 2673 struct sctp_laddr *laddr, *oladdr; 2674 2675 atomic_add_int(&stcb->asoc.refcnt, 1); 2676 SCTP_TCB_UNLOCK(stcb); 2677 SCTP_INP_INFO_WLOCK(); 2678 SCTP_INP_WLOCK(old_inp); 2679 SCTP_INP_WLOCK(new_inp); 2680 SCTP_TCB_LOCK(stcb); 2681 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2682 2683 new_inp->sctp_ep.time_of_secret_change = 2684 old_inp->sctp_ep.time_of_secret_change; 2685 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2686 sizeof(old_inp->sctp_ep.secret_key)); 2687 new_inp->sctp_ep.current_secret_number = 2688 old_inp->sctp_ep.current_secret_number; 2689 new_inp->sctp_ep.last_secret_number = 2690 old_inp->sctp_ep.last_secret_number; 2691 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2692 2693 /* make it so new data pours into the new socket */ 2694 stcb->sctp_socket = new_inp->sctp_socket; 2695 stcb->sctp_ep = new_inp; 2696 2697 /* Copy the port across */ 2698 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2699 rport = stcb->rport; 2700 /* Pull the tcb from the old association */ 2701 LIST_REMOVE(stcb, sctp_tcbhash); 2702 LIST_REMOVE(stcb, sctp_tcblist); 2703 if (stcb->asoc.in_asocid_hash) { 2704 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2705 } 2706 /* Now insert the new_inp into the TCP connected hash */ 2707 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2708 2709 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2710 /* Its safe to access */ 2711 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2712 2713 /* Now move the tcb into the endpoint list */ 2714 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2715 /* 2716 * Question, do we even need to worry about the ep-hash since we 2717 * only have one connection? Probably not :> so lets get rid of it 2718 * and not suck up any kernel memory in that. 2719 */ 2720 if (stcb->asoc.in_asocid_hash) { 2721 struct sctpasochead *lhd; 2722 2723 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2724 new_inp->hashasocidmark)]; 2725 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2726 } 2727 /* Ok. Let's restart timer. */ 2728 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2729 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2730 stcb, net); 2731 } 2732 2733 SCTP_INP_INFO_WUNLOCK(); 2734 if (new_inp->sctp_tcbhash != NULL) { 2735 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2736 new_inp->sctp_tcbhash = NULL; 2737 } 2738 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2739 /* Subset bound, so copy in the laddr list from the old_inp */ 2740 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2741 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2742 if (laddr == NULL) { 2743 /* 2744 * Gak, what can we do? This assoc is really 2745 * HOSED. We probably should send an abort 2746 * here. 2747 */ 2748 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2749 continue; 2750 } 2751 SCTP_INCR_LADDR_COUNT(); 2752 bzero(laddr, sizeof(*laddr)); 2753 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2754 laddr->ifa = oladdr->ifa; 2755 atomic_add_int(&laddr->ifa->refcount, 1); 2756 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2757 sctp_nxt_addr); 2758 new_inp->laddr_count++; 2759 if (oladdr == stcb->asoc.last_used_address) { 2760 stcb->asoc.last_used_address = laddr; 2761 } 2762 } 2763 } 2764 /* 2765 * Now any running timers need to be adjusted since we really don't 2766 * care if they are running or not just blast in the new_inp into 2767 * all of them. 2768 */ 2769 2770 stcb->asoc.dack_timer.ep = (void *)new_inp; 2771 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2772 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2773 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2774 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2775 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2776 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2777 /* now what about the nets? */ 2778 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2779 net->pmtu_timer.ep = (void *)new_inp; 2780 net->hb_timer.ep = (void *)new_inp; 2781 net->rxt_timer.ep = (void *)new_inp; 2782 } 2783 SCTP_INP_WUNLOCK(new_inp); 2784 SCTP_INP_WUNLOCK(old_inp); 2785 } 2786 2787 2788 2789 2790 /* sctp_ifap is used to bypass normal local address validation checks */ 2791 int 2792 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2793 struct sctp_ifa *sctp_ifap, struct thread *p) 2794 { 2795 /* bind a ep to a socket address */ 2796 struct sctppcbhead *head; 2797 struct sctp_inpcb *inp, *inp_tmp; 2798 struct inpcb *ip_inp; 2799 int port_reuse_active = 0; 2800 int bindall; 2801 uint16_t lport; 2802 int error; 2803 uint32_t vrf_id; 2804 2805 lport = 0; 2806 bindall = 1; 2807 inp = (struct sctp_inpcb *)so->so_pcb; 2808 ip_inp = (struct inpcb *)so->so_pcb; 2809 #ifdef SCTP_DEBUG 2810 if (addr) { 2811 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2812 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2813 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2814 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2815 } 2816 #endif 2817 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2818 /* already did a bind, subsequent binds NOT allowed ! */ 2819 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2820 return (EINVAL); 2821 } 2822 #ifdef INVARIANTS 2823 if (p == NULL) 2824 panic("null proc/thread"); 2825 #endif 2826 if (addr != NULL) { 2827 switch (addr->sa_family) { 2828 #ifdef INET 2829 case AF_INET: 2830 { 2831 struct sockaddr_in *sin; 2832 2833 /* IPV6_V6ONLY socket? */ 2834 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2835 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2836 return (EINVAL); 2837 } 2838 if (addr->sa_len != sizeof(*sin)) { 2839 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2840 return (EINVAL); 2841 } 2842 sin = (struct sockaddr_in *)addr; 2843 lport = sin->sin_port; 2844 /* 2845 * For LOOPBACK the prison_local_ip4() call 2846 * will transmute the ip address to the 2847 * proper value. 2848 */ 2849 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2850 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2851 return (error); 2852 } 2853 if (sin->sin_addr.s_addr != INADDR_ANY) { 2854 bindall = 0; 2855 } 2856 break; 2857 } 2858 #endif 2859 #ifdef INET6 2860 case AF_INET6: 2861 { 2862 /* 2863 * Only for pure IPv6 Address. (No IPv4 2864 * Mapped!) 2865 */ 2866 struct sockaddr_in6 *sin6; 2867 2868 sin6 = (struct sockaddr_in6 *)addr; 2869 2870 if (addr->sa_len != sizeof(*sin6)) { 2871 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2872 return (EINVAL); 2873 } 2874 lport = sin6->sin6_port; 2875 /* 2876 * For LOOPBACK the prison_local_ip6() call 2877 * will transmute the ipv6 address to the 2878 * proper value. 2879 */ 2880 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2881 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2882 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2883 return (error); 2884 } 2885 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2886 bindall = 0; 2887 /* KAME hack: embed scopeid */ 2888 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2889 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2890 return (EINVAL); 2891 } 2892 } 2893 /* this must be cleared for ifa_ifwithaddr() */ 2894 sin6->sin6_scope_id = 0; 2895 break; 2896 } 2897 #endif 2898 default: 2899 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2900 return (EAFNOSUPPORT); 2901 } 2902 } 2903 SCTP_INP_INFO_WLOCK(); 2904 SCTP_INP_WLOCK(inp); 2905 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2906 vrf_id = inp->def_vrf_id; 2907 2908 /* increase our count due to the unlock we do */ 2909 SCTP_INP_INCR_REF(inp); 2910 if (lport) { 2911 /* 2912 * Did the caller specify a port? if so we must see if an ep 2913 * already has this one bound. 2914 */ 2915 /* got to be root to get at low ports */ 2916 if (ntohs(lport) < IPPORT_RESERVED) { 2917 if (p && (error = 2918 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2919 )) { 2920 SCTP_INP_DECR_REF(inp); 2921 SCTP_INP_WUNLOCK(inp); 2922 SCTP_INP_INFO_WUNLOCK(); 2923 return (error); 2924 } 2925 } 2926 SCTP_INP_WUNLOCK(inp); 2927 if (bindall) { 2928 vrf_id = inp->def_vrf_id; 2929 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2930 if (inp_tmp != NULL) { 2931 /* 2932 * lock guy returned and lower count note 2933 * that we are not bound so inp_tmp should 2934 * NEVER be inp. And it is this inp 2935 * (inp_tmp) that gets the reference bump, 2936 * so we must lower it. 2937 */ 2938 SCTP_INP_DECR_REF(inp_tmp); 2939 /* unlock info */ 2940 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2941 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2942 /* 2943 * Ok, must be one-2-one and 2944 * allowing port re-use 2945 */ 2946 port_reuse_active = 1; 2947 goto continue_anyway; 2948 } 2949 SCTP_INP_DECR_REF(inp); 2950 SCTP_INP_INFO_WUNLOCK(); 2951 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2952 return (EADDRINUSE); 2953 } 2954 } else { 2955 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2956 if (inp_tmp != NULL) { 2957 /* 2958 * lock guy returned and lower count note 2959 * that we are not bound so inp_tmp should 2960 * NEVER be inp. And it is this inp 2961 * (inp_tmp) that gets the reference bump, 2962 * so we must lower it. 2963 */ 2964 SCTP_INP_DECR_REF(inp_tmp); 2965 /* unlock info */ 2966 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2967 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2968 /* 2969 * Ok, must be one-2-one and 2970 * allowing port re-use 2971 */ 2972 port_reuse_active = 1; 2973 goto continue_anyway; 2974 } 2975 SCTP_INP_DECR_REF(inp); 2976 SCTP_INP_INFO_WUNLOCK(); 2977 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2978 return (EADDRINUSE); 2979 } 2980 } 2981 continue_anyway: 2982 SCTP_INP_WLOCK(inp); 2983 if (bindall) { 2984 /* verify that no lport is not used by a singleton */ 2985 if ((port_reuse_active == 0) && 2986 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2987 /* Sorry someone already has this one bound */ 2988 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2989 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2990 port_reuse_active = 1; 2991 } else { 2992 SCTP_INP_DECR_REF(inp); 2993 SCTP_INP_WUNLOCK(inp); 2994 SCTP_INP_INFO_WUNLOCK(); 2995 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2996 return (EADDRINUSE); 2997 } 2998 } 2999 } 3000 } else { 3001 uint16_t first, last, candidate; 3002 uint16_t count; 3003 int done; 3004 3005 if (ip_inp->inp_flags & INP_HIGHPORT) { 3006 first = MODULE_GLOBAL(ipport_hifirstauto); 3007 last = MODULE_GLOBAL(ipport_hilastauto); 3008 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3009 if (p && (error = 3010 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3011 )) { 3012 SCTP_INP_DECR_REF(inp); 3013 SCTP_INP_WUNLOCK(inp); 3014 SCTP_INP_INFO_WUNLOCK(); 3015 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3016 return (error); 3017 } 3018 first = MODULE_GLOBAL(ipport_lowfirstauto); 3019 last = MODULE_GLOBAL(ipport_lowlastauto); 3020 } else { 3021 first = MODULE_GLOBAL(ipport_firstauto); 3022 last = MODULE_GLOBAL(ipport_lastauto); 3023 } 3024 if (first > last) { 3025 uint16_t temp; 3026 3027 temp = first; 3028 first = last; 3029 last = temp; 3030 } 3031 count = last - first + 1; /* number of candidates */ 3032 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3033 3034 done = 0; 3035 while (!done) { 3036 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3037 done = 1; 3038 } 3039 if (!done) { 3040 if (--count == 0) { 3041 SCTP_INP_DECR_REF(inp); 3042 SCTP_INP_WUNLOCK(inp); 3043 SCTP_INP_INFO_WUNLOCK(); 3044 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3045 return (EADDRINUSE); 3046 } 3047 if (candidate == last) 3048 candidate = first; 3049 else 3050 candidate = candidate + 1; 3051 } 3052 } 3053 lport = htons(candidate); 3054 } 3055 SCTP_INP_DECR_REF(inp); 3056 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3057 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3058 /* 3059 * this really should not happen. The guy did a non-blocking 3060 * bind and then did a close at the same time. 3061 */ 3062 SCTP_INP_WUNLOCK(inp); 3063 SCTP_INP_INFO_WUNLOCK(); 3064 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3065 return (EINVAL); 3066 } 3067 /* ok we look clear to give out this port, so lets setup the binding */ 3068 if (bindall) { 3069 /* binding to all addresses, so just set in the proper flags */ 3070 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3071 /* set the automatic addr changes from kernel flag */ 3072 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3073 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3074 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3075 } else { 3076 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3077 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3078 } 3079 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3080 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3081 } else { 3082 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3083 } 3084 /* 3085 * set the automatic mobility_base from kernel flag (by 3086 * micchie) 3087 */ 3088 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3089 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3090 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3091 } else { 3092 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3093 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3094 } 3095 /* 3096 * set the automatic mobility_fasthandoff from kernel flag 3097 * (by micchie) 3098 */ 3099 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3100 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3101 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3102 } else { 3103 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3105 } 3106 } else { 3107 /* 3108 * bind specific, make sure flags is off and add a new 3109 * address structure to the sctp_addr_list inside the ep 3110 * structure. 3111 * 3112 * We will need to allocate one and insert it at the head. The 3113 * socketopt call can just insert new addresses in there as 3114 * well. It will also have to do the embed scope kame hack 3115 * too (before adding). 3116 */ 3117 struct sctp_ifa *ifa; 3118 struct sockaddr_storage store_sa; 3119 3120 memset(&store_sa, 0, sizeof(store_sa)); 3121 switch (addr->sa_family) { 3122 #ifdef INET 3123 case AF_INET: 3124 { 3125 struct sockaddr_in *sin; 3126 3127 sin = (struct sockaddr_in *)&store_sa; 3128 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3129 sin->sin_port = 0; 3130 break; 3131 } 3132 #endif 3133 #ifdef INET6 3134 case AF_INET6: 3135 { 3136 struct sockaddr_in6 *sin6; 3137 3138 sin6 = (struct sockaddr_in6 *)&store_sa; 3139 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3140 sin6->sin6_port = 0; 3141 break; 3142 } 3143 #endif 3144 default: 3145 break; 3146 } 3147 /* 3148 * first find the interface with the bound address need to 3149 * zero out the port to find the address! yuck! can't do 3150 * this earlier since need port for sctp_pcb_findep() 3151 */ 3152 if (sctp_ifap != NULL) { 3153 ifa = sctp_ifap; 3154 } else { 3155 /* 3156 * Note for BSD we hit here always other O/S's will 3157 * pass things in via the sctp_ifap argument 3158 * (Panda). 3159 */ 3160 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3161 vrf_id, SCTP_ADDR_NOT_LOCKED); 3162 } 3163 if (ifa == NULL) { 3164 /* Can't find an interface with that address */ 3165 SCTP_INP_WUNLOCK(inp); 3166 SCTP_INP_INFO_WUNLOCK(); 3167 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3168 return (EADDRNOTAVAIL); 3169 } 3170 #ifdef INET6 3171 if (addr->sa_family == AF_INET6) { 3172 /* GAK, more FIXME IFA lock? */ 3173 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3174 /* Can't bind a non-existent addr. */ 3175 SCTP_INP_WUNLOCK(inp); 3176 SCTP_INP_INFO_WUNLOCK(); 3177 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3178 return (EINVAL); 3179 } 3180 } 3181 #endif 3182 /* we're not bound all */ 3183 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3184 /* allow bindx() to send ASCONF's for binding changes */ 3185 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3186 /* clear automatic addr changes from kernel flag */ 3187 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3188 3189 /* add this address to the endpoint list */ 3190 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3191 if (error != 0) { 3192 SCTP_INP_WUNLOCK(inp); 3193 SCTP_INP_INFO_WUNLOCK(); 3194 return (error); 3195 } 3196 inp->laddr_count++; 3197 } 3198 /* find the bucket */ 3199 if (port_reuse_active) { 3200 /* Put it into tcp 1-2-1 hash */ 3201 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3202 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3203 } else { 3204 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3205 } 3206 /* put it in the bucket */ 3207 LIST_INSERT_HEAD(head, inp, sctp_hash); 3208 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3209 (void *)head, ntohs(lport), port_reuse_active); 3210 /* set in the port */ 3211 inp->sctp_lport = lport; 3212 3213 /* turn off just the unbound flag */ 3214 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3215 SCTP_INP_WUNLOCK(inp); 3216 SCTP_INP_INFO_WUNLOCK(); 3217 return (0); 3218 } 3219 3220 3221 static void 3222 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3223 { 3224 struct sctp_iterator *it, *nit; 3225 3226 /* 3227 * We enter with the only the ITERATOR_LOCK in place and a write 3228 * lock on the inp_info stuff. 3229 */ 3230 it = sctp_it_ctl.cur_it; 3231 if (it && (it->vn != curvnet)) { 3232 /* Its not looking at our VNET */ 3233 return; 3234 } 3235 if (it && (it->inp == inp)) { 3236 /* 3237 * This is tricky and we hold the iterator lock, but when it 3238 * returns and gets the lock (when we release it) the 3239 * iterator will try to operate on inp. We need to stop that 3240 * from happening. But of course the iterator has a 3241 * reference on the stcb and inp. We can mark it and it will 3242 * stop. 3243 * 3244 * If its a single iterator situation, we set the end iterator 3245 * flag. Otherwise we set the iterator to go to the next 3246 * inp. 3247 * 3248 */ 3249 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3250 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3251 } else { 3252 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3253 } 3254 } 3255 /* 3256 * Now go through and remove any single reference to our inp that 3257 * may be still pending on the list 3258 */ 3259 SCTP_IPI_ITERATOR_WQ_LOCK(); 3260 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3261 if (it->vn != curvnet) { 3262 continue; 3263 } 3264 if (it->inp == inp) { 3265 /* This one points to me is it inp specific? */ 3266 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3267 /* Remove and free this one */ 3268 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3269 it, sctp_nxt_itr); 3270 if (it->function_atend != NULL) { 3271 (*it->function_atend) (it->pointer, it->val); 3272 } 3273 SCTP_FREE(it, SCTP_M_ITER); 3274 } else { 3275 it->inp = LIST_NEXT(it->inp, sctp_list); 3276 if (it->inp) { 3277 SCTP_INP_INCR_REF(it->inp); 3278 } 3279 } 3280 /* 3281 * When its put in the refcnt is incremented so decr 3282 * it 3283 */ 3284 SCTP_INP_DECR_REF(inp); 3285 } 3286 } 3287 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3288 } 3289 3290 /* release sctp_inpcb unbind the port */ 3291 void 3292 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3293 { 3294 /* 3295 * Here we free a endpoint. We must find it (if it is in the Hash 3296 * table) and remove it from there. Then we must also find it in the 3297 * overall list and remove it from there. After all removals are 3298 * complete then any timer has to be stopped. Then start the actual 3299 * freeing. a) Any local lists. b) Any associations. c) The hash of 3300 * all associations. d) finally the ep itself. 3301 */ 3302 struct sctp_tcb *asoc, *nasoc; 3303 struct sctp_laddr *laddr, *nladdr; 3304 struct inpcb *ip_pcb; 3305 struct socket *so; 3306 int being_refed = 0; 3307 struct sctp_queued_to_read *sq, *nsq; 3308 int cnt; 3309 sctp_sharedkey_t *shared_key, *nshared_key; 3310 3311 3312 #ifdef SCTP_LOG_CLOSING 3313 sctp_log_closing(inp, NULL, 0); 3314 #endif 3315 SCTP_ITERATOR_LOCK(); 3316 /* mark any iterators on the list or being processed */ 3317 sctp_iterator_inp_being_freed(inp); 3318 SCTP_ITERATOR_UNLOCK(); 3319 so = inp->sctp_socket; 3320 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3321 /* been here before.. eeks.. get out of here */ 3322 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3323 #ifdef SCTP_LOG_CLOSING 3324 sctp_log_closing(inp, NULL, 1); 3325 #endif 3326 return; 3327 } 3328 SCTP_ASOC_CREATE_LOCK(inp); 3329 SCTP_INP_INFO_WLOCK(); 3330 3331 SCTP_INP_WLOCK(inp); 3332 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3333 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3334 /* socket is gone, so no more wakeups allowed */ 3335 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3336 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3337 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3338 3339 } 3340 /* First time through we have the socket lock, after that no more. */ 3341 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3342 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3343 3344 if (inp->control) { 3345 sctp_m_freem(inp->control); 3346 inp->control = NULL; 3347 } 3348 if (inp->pkt) { 3349 sctp_m_freem(inp->pkt); 3350 inp->pkt = NULL; 3351 } 3352 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3353 * here but I will be nice :> (i.e. 3354 * ip_pcb = ep;) */ 3355 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3356 int cnt_in_sd; 3357 3358 cnt_in_sd = 0; 3359 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3360 SCTP_TCB_LOCK(asoc); 3361 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3362 /* Skip guys being freed */ 3363 cnt_in_sd++; 3364 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3365 /* 3366 * Special case - we did not start a 3367 * kill timer on the asoc due to it 3368 * was not closed. So go ahead and 3369 * start it now. 3370 */ 3371 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3372 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3373 } 3374 SCTP_TCB_UNLOCK(asoc); 3375 continue; 3376 } 3377 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3378 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3379 (asoc->asoc.total_output_queue_size == 0)) { 3380 /* 3381 * If we have data in queue, we don't want 3382 * to just free since the app may have done, 3383 * send()/close or connect/send/close. And 3384 * it wants the data to get across first. 3385 */ 3386 /* Just abandon things in the front states */ 3387 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3388 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3389 cnt_in_sd++; 3390 } 3391 continue; 3392 } 3393 /* Disconnect the socket please */ 3394 asoc->sctp_socket = NULL; 3395 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3396 if ((asoc->asoc.size_on_reasm_queue > 0) || 3397 (asoc->asoc.control_pdapi) || 3398 (asoc->asoc.size_on_all_streams > 0) || 3399 (so && (so->so_rcv.sb_cc > 0))) { 3400 /* Left with Data unread */ 3401 struct mbuf *op_err; 3402 3403 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3404 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3405 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3406 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3407 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3408 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3409 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3410 } 3411 if (sctp_free_assoc(inp, asoc, 3412 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3413 cnt_in_sd++; 3414 } 3415 continue; 3416 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3417 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3418 (asoc->asoc.stream_queue_cnt == 0)) { 3419 if (asoc->asoc.locked_on_sending) { 3420 goto abort_anyway; 3421 } 3422 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3423 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3424 struct sctp_nets *netp; 3425 3426 /* 3427 * there is nothing queued to send, 3428 * so I send shutdown 3429 */ 3430 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3431 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3432 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3433 } 3434 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3435 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3436 sctp_stop_timers_for_shutdown(asoc); 3437 if (asoc->asoc.alternate) { 3438 netp = asoc->asoc.alternate; 3439 } else { 3440 netp = asoc->asoc.primary_destination; 3441 } 3442 sctp_send_shutdown(asoc, netp); 3443 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3444 netp); 3445 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3446 asoc->asoc.primary_destination); 3447 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3448 } 3449 } else { 3450 /* mark into shutdown pending */ 3451 struct sctp_stream_queue_pending *sp; 3452 3453 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3454 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3455 asoc->asoc.primary_destination); 3456 if (asoc->asoc.locked_on_sending) { 3457 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3458 sctp_streamhead); 3459 if (sp == NULL) { 3460 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3461 (void *)asoc->asoc.locked_on_sending, 3462 asoc->asoc.locked_on_sending->stream_no); 3463 } else { 3464 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3465 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3466 } 3467 } 3468 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3469 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3470 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3471 struct mbuf *op_err; 3472 3473 abort_anyway: 3474 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3475 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3476 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3477 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3478 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3479 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3480 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3481 } 3482 if (sctp_free_assoc(inp, asoc, 3483 SCTP_PCBFREE_NOFORCE, 3484 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3485 cnt_in_sd++; 3486 } 3487 continue; 3488 } else { 3489 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3490 } 3491 } 3492 cnt_in_sd++; 3493 SCTP_TCB_UNLOCK(asoc); 3494 } 3495 /* now is there some left in our SHUTDOWN state? */ 3496 if (cnt_in_sd) { 3497 #ifdef SCTP_LOG_CLOSING 3498 sctp_log_closing(inp, NULL, 2); 3499 #endif 3500 inp->sctp_socket = NULL; 3501 SCTP_INP_WUNLOCK(inp); 3502 SCTP_ASOC_CREATE_UNLOCK(inp); 3503 SCTP_INP_INFO_WUNLOCK(); 3504 return; 3505 } 3506 } 3507 inp->sctp_socket = NULL; 3508 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3509 SCTP_PCB_FLAGS_UNBOUND) { 3510 /* 3511 * ok, this guy has been bound. It's port is somewhere in 3512 * the SCTP_BASE_INFO(hash table). Remove it! 3513 */ 3514 LIST_REMOVE(inp, sctp_hash); 3515 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3516 } 3517 /* 3518 * If there is a timer running to kill us, forget it, since it may 3519 * have a contest on the INP lock.. which would cause us to die ... 3520 */ 3521 cnt = 0; 3522 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3523 SCTP_TCB_LOCK(asoc); 3524 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3525 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3526 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3527 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3528 } 3529 cnt++; 3530 SCTP_TCB_UNLOCK(asoc); 3531 continue; 3532 } 3533 /* Free associations that are NOT killing us */ 3534 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3535 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3536 struct mbuf *op_err; 3537 3538 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3539 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3540 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3541 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3542 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3543 cnt++; 3544 SCTP_TCB_UNLOCK(asoc); 3545 continue; 3546 } 3547 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3548 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3549 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3550 } 3551 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3552 cnt++; 3553 } 3554 } 3555 if (cnt) { 3556 /* Ok we have someone out there that will kill us */ 3557 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3558 #ifdef SCTP_LOG_CLOSING 3559 sctp_log_closing(inp, NULL, 3); 3560 #endif 3561 SCTP_INP_WUNLOCK(inp); 3562 SCTP_ASOC_CREATE_UNLOCK(inp); 3563 SCTP_INP_INFO_WUNLOCK(); 3564 return; 3565 } 3566 if (SCTP_INP_LOCK_CONTENDED(inp)) 3567 being_refed++; 3568 if (SCTP_INP_READ_CONTENDED(inp)) 3569 being_refed++; 3570 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3571 being_refed++; 3572 3573 if ((inp->refcount) || 3574 (being_refed) || 3575 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3576 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3577 #ifdef SCTP_LOG_CLOSING 3578 sctp_log_closing(inp, NULL, 4); 3579 #endif 3580 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3581 SCTP_INP_WUNLOCK(inp); 3582 SCTP_ASOC_CREATE_UNLOCK(inp); 3583 SCTP_INP_INFO_WUNLOCK(); 3584 return; 3585 } 3586 inp->sctp_ep.signature_change.type = 0; 3587 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3588 /* 3589 * Remove it from the list .. last thing we need a lock for. 3590 */ 3591 LIST_REMOVE(inp, sctp_list); 3592 SCTP_INP_WUNLOCK(inp); 3593 SCTP_ASOC_CREATE_UNLOCK(inp); 3594 SCTP_INP_INFO_WUNLOCK(); 3595 /* 3596 * Now we release all locks. Since this INP cannot be found anymore 3597 * except possibly by the kill timer that might be running. We call 3598 * the drain function here. It should hit the case were it sees the 3599 * ACTIVE flag cleared and exit out freeing us to proceed and 3600 * destroy everything. 3601 */ 3602 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3603 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3604 } else { 3605 /* Probably un-needed */ 3606 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3607 } 3608 3609 #ifdef SCTP_LOG_CLOSING 3610 sctp_log_closing(inp, NULL, 5); 3611 #endif 3612 3613 3614 if ((inp->sctp_asocidhash) != NULL) { 3615 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3616 inp->sctp_asocidhash = NULL; 3617 } 3618 /* sa_ignore FREED_MEMORY */ 3619 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3620 /* Its only abandoned if it had data left */ 3621 if (sq->length) 3622 SCTP_STAT_INCR(sctps_left_abandon); 3623 3624 TAILQ_REMOVE(&inp->read_queue, sq, next); 3625 sctp_free_remote_addr(sq->whoFrom); 3626 if (so) 3627 so->so_rcv.sb_cc -= sq->length; 3628 if (sq->data) { 3629 sctp_m_freem(sq->data); 3630 sq->data = NULL; 3631 } 3632 /* 3633 * no need to free the net count, since at this point all 3634 * assoc's are gone. 3635 */ 3636 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3637 SCTP_DECR_READQ_COUNT(); 3638 } 3639 /* Now the sctp_pcb things */ 3640 /* 3641 * free each asoc if it is not already closed/free. we can't use the 3642 * macro here since le_next will get freed as part of the 3643 * sctp_free_assoc() call. 3644 */ 3645 if (so) { 3646 #ifdef IPSEC 3647 ipsec_delete_pcbpolicy(ip_pcb); 3648 #endif /* IPSEC */ 3649 3650 /* Unlocks not needed since the socket is gone now */ 3651 } 3652 if (ip_pcb->inp_options) { 3653 (void)sctp_m_free(ip_pcb->inp_options); 3654 ip_pcb->inp_options = 0; 3655 } 3656 #ifdef INET6 3657 if (ip_pcb->inp_vflag & INP_IPV6) { 3658 struct in6pcb *in6p; 3659 3660 in6p = (struct in6pcb *)inp; 3661 ip6_freepcbopts(in6p->in6p_outputopts); 3662 } 3663 #endif /* INET6 */ 3664 ip_pcb->inp_vflag = 0; 3665 /* free up authentication fields */ 3666 if (inp->sctp_ep.local_auth_chunks != NULL) 3667 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3668 if (inp->sctp_ep.local_hmacs != NULL) 3669 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3670 3671 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3672 LIST_REMOVE(shared_key, next); 3673 sctp_free_sharedkey(shared_key); 3674 /* sa_ignore FREED_MEMORY */ 3675 } 3676 3677 /* 3678 * if we have an address list the following will free the list of 3679 * ifaddr's that are set into this ep. Again macro limitations here, 3680 * since the LIST_FOREACH could be a bad idea. 3681 */ 3682 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3683 sctp_remove_laddr(laddr); 3684 } 3685 3686 #ifdef SCTP_TRACK_FREED_ASOCS 3687 /* TEMP CODE */ 3688 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3689 LIST_REMOVE(asoc, sctp_tcblist); 3690 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3691 SCTP_DECR_ASOC_COUNT(); 3692 } 3693 /* *** END TEMP CODE *** */ 3694 #endif 3695 /* Now lets see about freeing the EP hash table. */ 3696 if (inp->sctp_tcbhash != NULL) { 3697 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3698 inp->sctp_tcbhash = NULL; 3699 } 3700 /* Now we must put the ep memory back into the zone pool */ 3701 crfree(inp->ip_inp.inp.inp_cred); 3702 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3703 SCTP_INP_LOCK_DESTROY(inp); 3704 SCTP_INP_READ_DESTROY(inp); 3705 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3706 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3707 SCTP_DECR_EP_COUNT(); 3708 } 3709 3710 3711 struct sctp_nets * 3712 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3713 { 3714 struct sctp_nets *net; 3715 3716 /* locate the address */ 3717 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3718 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3719 return (net); 3720 } 3721 return (NULL); 3722 } 3723 3724 3725 int 3726 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3727 { 3728 struct sctp_ifa *sctp_ifa; 3729 3730 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3731 if (sctp_ifa) { 3732 return (1); 3733 } else { 3734 return (0); 3735 } 3736 } 3737 3738 /* 3739 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3740 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3741 * stats of stuff. 3742 */ 3743 int 3744 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3745 struct sctp_nets **netp, int set_scope, int from) 3746 { 3747 /* 3748 * The following is redundant to the same lines in the 3749 * sctp_aloc_assoc() but is needed since others call the add address 3750 * function 3751 */ 3752 struct sctp_nets *net, *netfirst; 3753 int addr_inscope; 3754 3755 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3756 from); 3757 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3758 3759 netfirst = sctp_findnet(stcb, newaddr); 3760 if (netfirst) { 3761 /* 3762 * Lie and return ok, we don't want to make the association 3763 * go away for this behavior. It will happen in the TCP 3764 * model in a connected socket. It does not reach the hash 3765 * table until after the association is built so it can't be 3766 * found. Mark as reachable, since the initial creation will 3767 * have been cleared and the NOT_IN_ASSOC flag will have 3768 * been added... and we don't want to end up removing it 3769 * back out. 3770 */ 3771 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3772 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3773 SCTP_ADDR_UNCONFIRMED); 3774 } else { 3775 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3776 } 3777 3778 return (0); 3779 } 3780 addr_inscope = 1; 3781 switch (newaddr->sa_family) { 3782 #ifdef INET 3783 case AF_INET: 3784 { 3785 struct sockaddr_in *sin; 3786 3787 sin = (struct sockaddr_in *)newaddr; 3788 if (sin->sin_addr.s_addr == 0) { 3789 /* Invalid address */ 3790 return (-1); 3791 } 3792 /* zero out the bzero area */ 3793 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3794 3795 /* assure len is set */ 3796 sin->sin_len = sizeof(struct sockaddr_in); 3797 if (set_scope) { 3798 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3799 stcb->asoc.scope.ipv4_local_scope = 1; 3800 #else 3801 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3802 stcb->asoc.scope.ipv4_local_scope = 1; 3803 } 3804 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3805 } else { 3806 /* Validate the address is in scope */ 3807 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3808 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3809 addr_inscope = 0; 3810 } 3811 } 3812 break; 3813 } 3814 #endif 3815 #ifdef INET6 3816 case AF_INET6: 3817 { 3818 struct sockaddr_in6 *sin6; 3819 3820 sin6 = (struct sockaddr_in6 *)newaddr; 3821 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3822 /* Invalid address */ 3823 return (-1); 3824 } 3825 /* assure len is set */ 3826 sin6->sin6_len = sizeof(struct sockaddr_in6); 3827 if (set_scope) { 3828 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3829 stcb->asoc.scope.loopback_scope = 1; 3830 stcb->asoc.scope.local_scope = 0; 3831 stcb->asoc.scope.ipv4_local_scope = 1; 3832 stcb->asoc.scope.site_scope = 1; 3833 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3834 /* 3835 * If the new destination is a 3836 * LINK_LOCAL we must have common 3837 * site scope. Don't set the local 3838 * scope since we may not share all 3839 * links, only loopback can do this. 3840 * Links on the local network would 3841 * also be on our private network 3842 * for v4 too. 3843 */ 3844 stcb->asoc.scope.ipv4_local_scope = 1; 3845 stcb->asoc.scope.site_scope = 1; 3846 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3847 /* 3848 * If the new destination is 3849 * SITE_LOCAL then we must have site 3850 * scope in common. 3851 */ 3852 stcb->asoc.scope.site_scope = 1; 3853 } 3854 } else { 3855 /* Validate the address is in scope */ 3856 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3857 (stcb->asoc.scope.loopback_scope == 0)) { 3858 addr_inscope = 0; 3859 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3860 (stcb->asoc.scope.local_scope == 0)) { 3861 addr_inscope = 0; 3862 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3863 (stcb->asoc.scope.site_scope == 0)) { 3864 addr_inscope = 0; 3865 } 3866 } 3867 break; 3868 } 3869 #endif 3870 default: 3871 /* not supported family type */ 3872 return (-1); 3873 } 3874 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3875 if (net == NULL) { 3876 return (-1); 3877 } 3878 SCTP_INCR_RADDR_COUNT(); 3879 bzero(net, sizeof(struct sctp_nets)); 3880 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3881 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3882 switch (newaddr->sa_family) { 3883 #ifdef INET 3884 case AF_INET: 3885 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3886 break; 3887 #endif 3888 #ifdef INET6 3889 case AF_INET6: 3890 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3891 break; 3892 #endif 3893 default: 3894 break; 3895 } 3896 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3897 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3898 stcb->asoc.scope.loopback_scope = 1; 3899 stcb->asoc.scope.ipv4_local_scope = 1; 3900 stcb->asoc.scope.local_scope = 0; 3901 stcb->asoc.scope.site_scope = 1; 3902 addr_inscope = 1; 3903 } 3904 net->failure_threshold = stcb->asoc.def_net_failure; 3905 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3906 if (addr_inscope == 0) { 3907 net->dest_state = (SCTP_ADDR_REACHABLE | 3908 SCTP_ADDR_OUT_OF_SCOPE); 3909 } else { 3910 if (from == SCTP_ADDR_IS_CONFIRMED) 3911 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3912 net->dest_state = SCTP_ADDR_REACHABLE; 3913 else 3914 net->dest_state = SCTP_ADDR_REACHABLE | 3915 SCTP_ADDR_UNCONFIRMED; 3916 } 3917 /* 3918 * We set this to 0, the timer code knows that this means its an 3919 * initial value 3920 */ 3921 net->rto_needed = 1; 3922 net->RTO = 0; 3923 net->RTO_measured = 0; 3924 stcb->asoc.numnets++; 3925 net->ref_count = 1; 3926 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3927 net->port = stcb->asoc.port; 3928 net->dscp = stcb->asoc.default_dscp; 3929 #ifdef INET6 3930 net->flowlabel = stcb->asoc.default_flowlabel; 3931 #endif 3932 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3933 net->dest_state |= SCTP_ADDR_NOHB; 3934 } else { 3935 net->dest_state &= ~SCTP_ADDR_NOHB; 3936 } 3937 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3938 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3939 } else { 3940 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3941 } 3942 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3943 /* Init the timer structure */ 3944 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3945 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3946 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3947 3948 /* Now generate a route for this guy */ 3949 #ifdef INET6 3950 /* KAME hack: embed scopeid */ 3951 if (newaddr->sa_family == AF_INET6) { 3952 struct sockaddr_in6 *sin6; 3953 3954 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3955 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3956 sin6->sin6_scope_id = 0; 3957 } 3958 #endif 3959 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3960 3961 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3962 /* Get source address */ 3963 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3964 stcb, 3965 (sctp_route_t *) & net->ro, 3966 net, 3967 0, 3968 stcb->asoc.vrf_id); 3969 /* Now get the interface MTU */ 3970 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3971 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3972 } 3973 if (net->mtu > 0) { 3974 uint32_t rmtu; 3975 3976 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3977 if (rmtu == 0) { 3978 /* 3979 * Start things off to match mtu of 3980 * interface please. 3981 */ 3982 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3983 net->ro.ro_rt, net->mtu); 3984 } else { 3985 /* 3986 * we take the route mtu over the interface, 3987 * since the route may be leading out the 3988 * loopback, or a different interface. 3989 */ 3990 net->mtu = rmtu; 3991 } 3992 } 3993 } 3994 if (net->mtu == 0) { 3995 switch (newaddr->sa_family) { 3996 #ifdef INET 3997 case AF_INET: 3998 net->mtu = SCTP_DEFAULT_MTU; 3999 break; 4000 #endif 4001 #ifdef INET6 4002 case AF_INET6: 4003 net->mtu = 1280; 4004 break; 4005 #endif 4006 default: 4007 break; 4008 } 4009 } 4010 if (net->port) { 4011 net->mtu -= (uint32_t) sizeof(struct udphdr); 4012 } 4013 if (from == SCTP_ALLOC_ASOC) { 4014 stcb->asoc.smallest_mtu = net->mtu; 4015 } 4016 if (stcb->asoc.smallest_mtu > net->mtu) { 4017 stcb->asoc.smallest_mtu = net->mtu; 4018 } 4019 #ifdef INET6 4020 if (newaddr->sa_family == AF_INET6) { 4021 struct sockaddr_in6 *sin6; 4022 4023 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4024 (void)sa6_recoverscope(sin6); 4025 } 4026 #endif 4027 4028 /* JRS - Use the congestion control given in the CC module */ 4029 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4030 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4031 4032 /* 4033 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4034 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4035 */ 4036 net->find_pseudo_cumack = 1; 4037 net->find_rtx_pseudo_cumack = 1; 4038 net->src_addr_selected = 0; 4039 /* Choose an initial flowid. */ 4040 net->flowid = stcb->asoc.my_vtag ^ 4041 ntohs(stcb->rport) ^ 4042 ntohs(stcb->sctp_ep->sctp_lport); 4043 #ifdef INVARIANTS 4044 net->flowidset = 1; 4045 #endif 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 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5961 } 5962 SCTP_WQ_ADDR_UNLOCK(); 5963 5964 /* 5965 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5966 * destroyed first). 5967 */ 5968 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5969 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5970 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5971 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5972 /* free the ifa */ 5973 LIST_REMOVE(ifa, next_bucket); 5974 LIST_REMOVE(ifa, next_ifa); 5975 SCTP_FREE(ifa, SCTP_M_IFA); 5976 } 5977 /* free the ifn */ 5978 LIST_REMOVE(ifn, next_bucket); 5979 LIST_REMOVE(ifn, next_ifn); 5980 SCTP_FREE(ifn, SCTP_M_IFN); 5981 } 5982 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5983 /* free the vrf */ 5984 LIST_REMOVE(vrf, next_vrf); 5985 SCTP_FREE(vrf, SCTP_M_VRF); 5986 } 5987 /* free the vrf hashes */ 5988 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5989 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5990 5991 /* 5992 * free the TIMEWAIT list elements malloc'd in the function 5993 * sctp_add_vtag_to_timewait()... 5994 */ 5995 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5996 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5997 if (!LIST_EMPTY(chain)) { 5998 prev_twait_block = NULL; 5999 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6000 if (prev_twait_block) { 6001 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6002 } 6003 prev_twait_block = twait_block; 6004 } 6005 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6006 } 6007 } 6008 6009 /* free the locks and mutexes */ 6010 #ifdef SCTP_PACKET_LOGGING 6011 SCTP_IP_PKTLOG_DESTROY(); 6012 #endif 6013 SCTP_IPI_ADDR_DESTROY(); 6014 SCTP_STATLOG_DESTROY(); 6015 SCTP_INP_INFO_LOCK_DESTROY(); 6016 6017 SCTP_WQ_ADDR_DESTROY(); 6018 6019 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6020 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6021 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6022 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6023 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6024 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6025 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6026 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6027 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6028 /* Get rid of other stuff to */ 6029 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6030 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6031 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6032 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6033 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6034 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6035 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6036 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6037 #endif 6038 } 6039 6040 6041 int 6042 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6043 int offset, int limit, 6044 struct sockaddr *src, struct sockaddr *dst, 6045 struct sockaddr *altsa) 6046 { 6047 /* 6048 * grub through the INIT pulling addresses and loading them to the 6049 * nets structure in the asoc. The from address in the mbuf should 6050 * also be loaded (if it is not already). This routine can be called 6051 * with either INIT or INIT-ACK's as long as the m points to the IP 6052 * packet and the offset points to the beginning of the parameters. 6053 */ 6054 struct sctp_inpcb *inp; 6055 struct sctp_nets *net, *nnet, *net_tmp; 6056 struct sctp_paramhdr *phdr, parm_buf; 6057 struct sctp_tcb *stcb_tmp; 6058 uint16_t ptype, plen; 6059 struct sockaddr *sa; 6060 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6061 struct sctp_auth_random *p_random = NULL; 6062 uint16_t random_len = 0; 6063 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6064 struct sctp_auth_hmac_algo *hmacs = NULL; 6065 uint16_t hmacs_len = 0; 6066 uint8_t saw_asconf = 0; 6067 uint8_t saw_asconf_ack = 0; 6068 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6069 struct sctp_auth_chunk_list *chunks = NULL; 6070 uint16_t num_chunks = 0; 6071 sctp_key_t *new_key; 6072 uint32_t keylen; 6073 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6074 uint8_t ecn_allowed; 6075 6076 #ifdef INET 6077 struct sockaddr_in sin; 6078 6079 #endif 6080 #ifdef INET6 6081 struct sockaddr_in6 sin6; 6082 6083 #endif 6084 6085 /* First get the destination address setup too. */ 6086 #ifdef INET 6087 memset(&sin, 0, sizeof(sin)); 6088 sin.sin_family = AF_INET; 6089 sin.sin_len = sizeof(sin); 6090 sin.sin_port = stcb->rport; 6091 #endif 6092 #ifdef INET6 6093 memset(&sin6, 0, sizeof(sin6)); 6094 sin6.sin6_family = AF_INET6; 6095 sin6.sin6_len = sizeof(struct sockaddr_in6); 6096 sin6.sin6_port = stcb->rport; 6097 #endif 6098 if (altsa) { 6099 sa = altsa; 6100 } else { 6101 sa = src; 6102 } 6103 /* Turn off ECN until we get through all params */ 6104 ecn_allowed = 0; 6105 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6106 /* mark all addresses that we have currently on the list */ 6107 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6108 } 6109 /* does the source address already exist? if so skip it */ 6110 inp = stcb->sctp_ep; 6111 atomic_add_int(&stcb->asoc.refcnt, 1); 6112 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6113 atomic_add_int(&stcb->asoc.refcnt, -1); 6114 6115 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6116 /* we must add the source address */ 6117 /* no scope set here since we have a tcb already. */ 6118 switch (sa->sa_family) { 6119 #ifdef INET 6120 case AF_INET: 6121 if (stcb->asoc.scope.ipv4_addr_legal) { 6122 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6123 return (-1); 6124 } 6125 } 6126 break; 6127 #endif 6128 #ifdef INET6 6129 case AF_INET6: 6130 if (stcb->asoc.scope.ipv6_addr_legal) { 6131 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6132 return (-2); 6133 } 6134 } 6135 break; 6136 #endif 6137 default: 6138 break; 6139 } 6140 } else { 6141 if (net_tmp != NULL && stcb_tmp == stcb) { 6142 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6143 } else if (stcb_tmp != stcb) { 6144 /* It belongs to another association? */ 6145 if (stcb_tmp) 6146 SCTP_TCB_UNLOCK(stcb_tmp); 6147 return (-3); 6148 } 6149 } 6150 if (stcb->asoc.state == 0) { 6151 /* the assoc was freed? */ 6152 return (-4); 6153 } 6154 /* 6155 * peer must explicitly turn this on. This may have been initialized 6156 * to be "on" in order to allow local addr changes while INIT's are 6157 * in flight. 6158 */ 6159 stcb->asoc.peer_supports_asconf = 0; 6160 /* now we must go through each of the params. */ 6161 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6162 while (phdr) { 6163 ptype = ntohs(phdr->param_type); 6164 plen = ntohs(phdr->param_length); 6165 /* 6166 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6167 * (uint32_t)ptype, (int)plen); 6168 */ 6169 if (offset + plen > limit) { 6170 break; 6171 } 6172 if (plen == 0) { 6173 break; 6174 } 6175 #ifdef INET 6176 if (ptype == SCTP_IPV4_ADDRESS) { 6177 if (stcb->asoc.scope.ipv4_addr_legal) { 6178 struct sctp_ipv4addr_param *p4, p4_buf; 6179 6180 /* ok get the v4 address and check/add */ 6181 phdr = sctp_get_next_param(m, offset, 6182 (struct sctp_paramhdr *)&p4_buf, 6183 sizeof(p4_buf)); 6184 if (plen != sizeof(struct sctp_ipv4addr_param) || 6185 phdr == NULL) { 6186 return (-5); 6187 } 6188 p4 = (struct sctp_ipv4addr_param *)phdr; 6189 sin.sin_addr.s_addr = p4->addr; 6190 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6191 /* Skip multi-cast addresses */ 6192 goto next_param; 6193 } 6194 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6195 (sin.sin_addr.s_addr == INADDR_ANY)) { 6196 goto next_param; 6197 } 6198 sa = (struct sockaddr *)&sin; 6199 inp = stcb->sctp_ep; 6200 atomic_add_int(&stcb->asoc.refcnt, 1); 6201 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6202 dst, stcb); 6203 atomic_add_int(&stcb->asoc.refcnt, -1); 6204 6205 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6206 inp == NULL) { 6207 /* we must add the source address */ 6208 /* 6209 * no scope set since we have a tcb 6210 * already 6211 */ 6212 6213 /* 6214 * we must validate the state again 6215 * here 6216 */ 6217 add_it_now: 6218 if (stcb->asoc.state == 0) { 6219 /* the assoc was freed? */ 6220 return (-7); 6221 } 6222 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6223 return (-8); 6224 } 6225 } else if (stcb_tmp == stcb) { 6226 if (stcb->asoc.state == 0) { 6227 /* the assoc was freed? */ 6228 return (-10); 6229 } 6230 if (net != NULL) { 6231 /* clear flag */ 6232 net->dest_state &= 6233 ~SCTP_ADDR_NOT_IN_ASSOC; 6234 } 6235 } else { 6236 /* 6237 * strange, address is in another 6238 * assoc? straighten out locks. 6239 */ 6240 if (stcb_tmp) { 6241 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6242 /* 6243 * in setup state we 6244 * abort this guy 6245 */ 6246 sctp_abort_an_association(stcb_tmp->sctp_ep, 6247 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6248 goto add_it_now; 6249 } 6250 SCTP_TCB_UNLOCK(stcb_tmp); 6251 } 6252 if (stcb->asoc.state == 0) { 6253 /* the assoc was freed? */ 6254 return (-12); 6255 } 6256 return (-13); 6257 } 6258 } 6259 } else 6260 #endif 6261 #ifdef INET6 6262 if (ptype == SCTP_IPV6_ADDRESS) { 6263 if (stcb->asoc.scope.ipv6_addr_legal) { 6264 /* ok get the v6 address and check/add */ 6265 struct sctp_ipv6addr_param *p6, p6_buf; 6266 6267 phdr = sctp_get_next_param(m, offset, 6268 (struct sctp_paramhdr *)&p6_buf, 6269 sizeof(p6_buf)); 6270 if (plen != sizeof(struct sctp_ipv6addr_param) || 6271 phdr == NULL) { 6272 return (-14); 6273 } 6274 p6 = (struct sctp_ipv6addr_param *)phdr; 6275 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6276 sizeof(p6->addr)); 6277 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6278 /* Skip multi-cast addresses */ 6279 goto next_param; 6280 } 6281 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6282 /* 6283 * Link local make no sense without 6284 * scope 6285 */ 6286 goto next_param; 6287 } 6288 sa = (struct sockaddr *)&sin6; 6289 inp = stcb->sctp_ep; 6290 atomic_add_int(&stcb->asoc.refcnt, 1); 6291 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6292 dst, stcb); 6293 atomic_add_int(&stcb->asoc.refcnt, -1); 6294 if (stcb_tmp == NULL && 6295 (inp == stcb->sctp_ep || inp == NULL)) { 6296 /* 6297 * we must validate the state again 6298 * here 6299 */ 6300 add_it_now6: 6301 if (stcb->asoc.state == 0) { 6302 /* the assoc was freed? */ 6303 return (-16); 6304 } 6305 /* 6306 * we must add the address, no scope 6307 * set 6308 */ 6309 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6310 return (-17); 6311 } 6312 } else if (stcb_tmp == stcb) { 6313 /* 6314 * we must validate the state again 6315 * here 6316 */ 6317 if (stcb->asoc.state == 0) { 6318 /* the assoc was freed? */ 6319 return (-19); 6320 } 6321 if (net != NULL) { 6322 /* clear flag */ 6323 net->dest_state &= 6324 ~SCTP_ADDR_NOT_IN_ASSOC; 6325 } 6326 } else { 6327 /* 6328 * strange, address is in another 6329 * assoc? straighten out locks. 6330 */ 6331 if (stcb_tmp) 6332 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6333 /* 6334 * in setup state we 6335 * abort this guy 6336 */ 6337 sctp_abort_an_association(stcb_tmp->sctp_ep, 6338 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6339 goto add_it_now6; 6340 } 6341 SCTP_TCB_UNLOCK(stcb_tmp); 6342 6343 if (stcb->asoc.state == 0) { 6344 /* the assoc was freed? */ 6345 return (-21); 6346 } 6347 return (-22); 6348 } 6349 } 6350 } else 6351 #endif 6352 if (ptype == SCTP_ECN_CAPABLE) { 6353 ecn_allowed = 1; 6354 } else if (ptype == SCTP_ULP_ADAPTATION) { 6355 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6356 struct sctp_adaptation_layer_indication ai, 6357 *aip; 6358 6359 phdr = sctp_get_next_param(m, offset, 6360 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6361 aip = (struct sctp_adaptation_layer_indication *)phdr; 6362 if (aip) { 6363 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6364 stcb->asoc.adaptation_needed = 1; 6365 } 6366 } 6367 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6368 struct sctp_asconf_addr_param lstore, *fee; 6369 int lptype; 6370 struct sockaddr *lsa = NULL; 6371 6372 #ifdef INET 6373 struct sctp_asconf_addrv4_param *fii; 6374 6375 #endif 6376 6377 stcb->asoc.peer_supports_asconf = 1; 6378 if (plen > sizeof(lstore)) { 6379 return (-23); 6380 } 6381 phdr = sctp_get_next_param(m, offset, 6382 (struct sctp_paramhdr *)&lstore, 6383 min(plen, sizeof(lstore))); 6384 if (phdr == NULL) { 6385 return (-24); 6386 } 6387 fee = (struct sctp_asconf_addr_param *)phdr; 6388 lptype = ntohs(fee->addrp.ph.param_type); 6389 switch (lptype) { 6390 #ifdef INET 6391 case SCTP_IPV4_ADDRESS: 6392 if (plen != 6393 sizeof(struct sctp_asconf_addrv4_param)) { 6394 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6395 (int)sizeof(struct sctp_asconf_addrv4_param), 6396 plen); 6397 } else { 6398 fii = (struct sctp_asconf_addrv4_param *)fee; 6399 sin.sin_addr.s_addr = fii->addrp.addr; 6400 lsa = (struct sockaddr *)&sin; 6401 } 6402 break; 6403 #endif 6404 #ifdef INET6 6405 case SCTP_IPV6_ADDRESS: 6406 if (plen != 6407 sizeof(struct sctp_asconf_addr_param)) { 6408 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6409 (int)sizeof(struct sctp_asconf_addr_param), 6410 plen); 6411 } else { 6412 memcpy(sin6.sin6_addr.s6_addr, 6413 fee->addrp.addr, 6414 sizeof(fee->addrp.addr)); 6415 lsa = (struct sockaddr *)&sin6; 6416 } 6417 break; 6418 #endif 6419 default: 6420 break; 6421 } 6422 if (lsa) { 6423 (void)sctp_set_primary_addr(stcb, sa, NULL); 6424 } 6425 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6426 stcb->asoc.peer_supports_nat = 1; 6427 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6428 /* Peer supports pr-sctp */ 6429 stcb->asoc.peer_supports_prsctp = 1; 6430 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6431 /* A supported extension chunk */ 6432 struct sctp_supported_chunk_types_param *pr_supported; 6433 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6434 int num_ent, i; 6435 6436 phdr = sctp_get_next_param(m, offset, 6437 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6438 if (phdr == NULL) { 6439 return (-25); 6440 } 6441 stcb->asoc.peer_supports_asconf = 0; 6442 stcb->asoc.peer_supports_prsctp = 0; 6443 stcb->asoc.peer_supports_pktdrop = 0; 6444 stcb->asoc.peer_supports_strreset = 0; 6445 stcb->asoc.peer_supports_nr_sack = 0; 6446 stcb->asoc.peer_supports_auth = 0; 6447 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6448 num_ent = plen - sizeof(struct sctp_paramhdr); 6449 for (i = 0; i < num_ent; i++) { 6450 switch (pr_supported->chunk_types[i]) { 6451 case SCTP_ASCONF: 6452 case SCTP_ASCONF_ACK: 6453 stcb->asoc.peer_supports_asconf = 1; 6454 break; 6455 case SCTP_FORWARD_CUM_TSN: 6456 stcb->asoc.peer_supports_prsctp = 1; 6457 break; 6458 case SCTP_PACKET_DROPPED: 6459 stcb->asoc.peer_supports_pktdrop = 1; 6460 break; 6461 case SCTP_NR_SELECTIVE_ACK: 6462 stcb->asoc.peer_supports_nr_sack = 1; 6463 break; 6464 case SCTP_STREAM_RESET: 6465 stcb->asoc.peer_supports_strreset = 1; 6466 break; 6467 case SCTP_AUTHENTICATION: 6468 stcb->asoc.peer_supports_auth = 1; 6469 break; 6470 default: 6471 /* one I have not learned yet */ 6472 break; 6473 6474 } 6475 } 6476 } else if (ptype == SCTP_RANDOM) { 6477 if (plen > sizeof(random_store)) 6478 break; 6479 if (got_random) { 6480 /* already processed a RANDOM */ 6481 goto next_param; 6482 } 6483 phdr = sctp_get_next_param(m, offset, 6484 (struct sctp_paramhdr *)random_store, 6485 min(sizeof(random_store), plen)); 6486 if (phdr == NULL) 6487 return (-26); 6488 p_random = (struct sctp_auth_random *)phdr; 6489 random_len = plen - sizeof(*p_random); 6490 /* enforce the random length */ 6491 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6492 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6493 return (-27); 6494 } 6495 got_random = 1; 6496 } else if (ptype == SCTP_HMAC_LIST) { 6497 int num_hmacs; 6498 int i; 6499 6500 if (plen > sizeof(hmacs_store)) 6501 break; 6502 if (got_hmacs) { 6503 /* already processed a HMAC list */ 6504 goto next_param; 6505 } 6506 phdr = sctp_get_next_param(m, offset, 6507 (struct sctp_paramhdr *)hmacs_store, 6508 min(plen, sizeof(hmacs_store))); 6509 if (phdr == NULL) 6510 return (-28); 6511 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6512 hmacs_len = plen - sizeof(*hmacs); 6513 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6514 /* validate the hmac list */ 6515 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6516 return (-29); 6517 } 6518 if (stcb->asoc.peer_hmacs != NULL) 6519 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6520 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6521 if (stcb->asoc.peer_hmacs != NULL) { 6522 for (i = 0; i < num_hmacs; i++) { 6523 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6524 ntohs(hmacs->hmac_ids[i])); 6525 } 6526 } 6527 got_hmacs = 1; 6528 } else if (ptype == SCTP_CHUNK_LIST) { 6529 int i; 6530 6531 if (plen > sizeof(chunks_store)) 6532 break; 6533 if (got_chklist) { 6534 /* already processed a Chunks list */ 6535 goto next_param; 6536 } 6537 phdr = sctp_get_next_param(m, offset, 6538 (struct sctp_paramhdr *)chunks_store, 6539 min(plen, sizeof(chunks_store))); 6540 if (phdr == NULL) 6541 return (-30); 6542 chunks = (struct sctp_auth_chunk_list *)phdr; 6543 num_chunks = plen - sizeof(*chunks); 6544 if (stcb->asoc.peer_auth_chunks != NULL) 6545 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6546 else 6547 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6548 for (i = 0; i < num_chunks; i++) { 6549 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6550 stcb->asoc.peer_auth_chunks); 6551 /* record asconf/asconf-ack if listed */ 6552 if (chunks->chunk_types[i] == SCTP_ASCONF) 6553 saw_asconf = 1; 6554 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6555 saw_asconf_ack = 1; 6556 6557 } 6558 got_chklist = 1; 6559 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6560 (ptype == SCTP_STATE_COOKIE) || 6561 (ptype == SCTP_UNRECOG_PARAM) || 6562 (ptype == SCTP_COOKIE_PRESERVE) || 6563 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6564 (ptype == SCTP_ADD_IP_ADDRESS) || 6565 (ptype == SCTP_DEL_IP_ADDRESS) || 6566 (ptype == SCTP_ERROR_CAUSE_IND) || 6567 (ptype == SCTP_SUCCESS_REPORT)) { 6568 /* don't care */ ; 6569 } else { 6570 if ((ptype & 0x8000) == 0x0000) { 6571 /* 6572 * must stop processing the rest of the 6573 * param's. Any report bits were handled 6574 * with the call to 6575 * sctp_arethere_unrecognized_parameters() 6576 * when the INIT or INIT-ACK was first seen. 6577 */ 6578 break; 6579 } 6580 } 6581 6582 next_param: 6583 offset += SCTP_SIZE32(plen); 6584 if (offset >= limit) { 6585 break; 6586 } 6587 phdr = sctp_get_next_param(m, offset, &parm_buf, 6588 sizeof(parm_buf)); 6589 } 6590 /* Now check to see if we need to purge any addresses */ 6591 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6592 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6593 SCTP_ADDR_NOT_IN_ASSOC) { 6594 /* This address has been removed from the asoc */ 6595 /* remove and free it */ 6596 stcb->asoc.numnets--; 6597 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6598 sctp_free_remote_addr(net); 6599 if (net == stcb->asoc.primary_destination) { 6600 stcb->asoc.primary_destination = NULL; 6601 sctp_select_primary_destination(stcb); 6602 } 6603 } 6604 } 6605 if (ecn_allowed == 0) { 6606 stcb->asoc.ecn_allowed = 0; 6607 } 6608 /* validate authentication required parameters */ 6609 if (got_random && got_hmacs) { 6610 stcb->asoc.peer_supports_auth = 1; 6611 } else { 6612 stcb->asoc.peer_supports_auth = 0; 6613 } 6614 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6615 /* peer does not support auth but sent a chunks list? */ 6616 return (-31); 6617 } 6618 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6619 !stcb->asoc.peer_supports_auth) { 6620 /* peer supports asconf but not auth? */ 6621 return (-32); 6622 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6623 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6624 return (-33); 6625 } 6626 /* concatenate the full random key */ 6627 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6628 if (chunks != NULL) { 6629 keylen += sizeof(*chunks) + num_chunks; 6630 } 6631 new_key = sctp_alloc_key(keylen); 6632 if (new_key != NULL) { 6633 /* copy in the RANDOM */ 6634 if (p_random != NULL) { 6635 keylen = sizeof(*p_random) + random_len; 6636 bcopy(p_random, new_key->key, keylen); 6637 } 6638 /* append in the AUTH chunks */ 6639 if (chunks != NULL) { 6640 bcopy(chunks, new_key->key + keylen, 6641 sizeof(*chunks) + num_chunks); 6642 keylen += sizeof(*chunks) + num_chunks; 6643 } 6644 /* append in the HMACs */ 6645 if (hmacs != NULL) { 6646 bcopy(hmacs, new_key->key + keylen, 6647 sizeof(*hmacs) + hmacs_len); 6648 } 6649 } else { 6650 /* failed to get memory for the key */ 6651 return (-34); 6652 } 6653 if (stcb->asoc.authinfo.peer_random != NULL) 6654 sctp_free_key(stcb->asoc.authinfo.peer_random); 6655 stcb->asoc.authinfo.peer_random = new_key; 6656 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6657 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6658 6659 return (0); 6660 } 6661 6662 int 6663 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6664 struct sctp_nets *net) 6665 { 6666 /* make sure the requested primary address exists in the assoc */ 6667 if (net == NULL && sa) 6668 net = sctp_findnet(stcb, sa); 6669 6670 if (net == NULL) { 6671 /* didn't find the requested primary address! */ 6672 return (-1); 6673 } else { 6674 /* set the primary address */ 6675 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6676 /* Must be confirmed, so queue to set */ 6677 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6678 return (0); 6679 } 6680 stcb->asoc.primary_destination = net; 6681 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6682 sctp_free_remote_addr(stcb->asoc.alternate); 6683 stcb->asoc.alternate = NULL; 6684 } 6685 net = TAILQ_FIRST(&stcb->asoc.nets); 6686 if (net != stcb->asoc.primary_destination) { 6687 /* 6688 * first one on the list is NOT the primary 6689 * sctp_cmpaddr() is much more efficient if the 6690 * primary is the first on the list, make it so. 6691 */ 6692 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6693 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6694 } 6695 return (0); 6696 } 6697 } 6698 6699 int 6700 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6701 { 6702 /* 6703 * This function serves two purposes. It will see if a TAG can be 6704 * re-used and return 1 for yes it is ok and 0 for don't use that 6705 * tag. A secondary function it will do is purge out old tags that 6706 * can be removed. 6707 */ 6708 struct sctpvtaghead *chain; 6709 struct sctp_tagblock *twait_block; 6710 struct sctpasochead *head; 6711 struct sctp_tcb *stcb; 6712 int i; 6713 6714 SCTP_INP_INFO_RLOCK(); 6715 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6716 SCTP_BASE_INFO(hashasocmark))]; 6717 if (head == NULL) { 6718 /* invalid vtag */ 6719 goto skip_vtag_check; 6720 } 6721 LIST_FOREACH(stcb, head, sctp_asocs) { 6722 /* 6723 * We choose not to lock anything here. TCB's can't be 6724 * removed since we have the read lock, so they can't be 6725 * freed on us, same thing for the INP. I may be wrong with 6726 * this assumption, but we will go with it for now :-) 6727 */ 6728 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6729 continue; 6730 } 6731 if (stcb->asoc.my_vtag == tag) { 6732 /* candidate */ 6733 if (stcb->rport != rport) { 6734 continue; 6735 } 6736 if (stcb->sctp_ep->sctp_lport != lport) { 6737 continue; 6738 } 6739 /* Its a used tag set */ 6740 SCTP_INP_INFO_RUNLOCK(); 6741 return (0); 6742 } 6743 } 6744 skip_vtag_check: 6745 6746 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6747 /* Now what about timed wait ? */ 6748 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6749 /* 6750 * Block(s) are present, lets see if we have this tag in the 6751 * list 6752 */ 6753 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6754 if (twait_block->vtag_block[i].v_tag == 0) { 6755 /* not used */ 6756 continue; 6757 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6758 now->tv_sec) { 6759 /* Audit expires this guy */ 6760 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6761 twait_block->vtag_block[i].v_tag = 0; 6762 twait_block->vtag_block[i].lport = 0; 6763 twait_block->vtag_block[i].rport = 0; 6764 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6765 (twait_block->vtag_block[i].lport == lport) && 6766 (twait_block->vtag_block[i].rport == rport)) { 6767 /* Bad tag, sorry :< */ 6768 SCTP_INP_INFO_RUNLOCK(); 6769 return (0); 6770 } 6771 } 6772 } 6773 SCTP_INP_INFO_RUNLOCK(); 6774 return (1); 6775 } 6776 6777 static void 6778 sctp_drain_mbufs(struct sctp_tcb *stcb) 6779 { 6780 /* 6781 * We must hunt this association for MBUF's past the cumack (i.e. 6782 * out of order data that we can renege on). 6783 */ 6784 struct sctp_association *asoc; 6785 struct sctp_tmit_chunk *chk, *nchk; 6786 uint32_t cumulative_tsn_p1; 6787 struct sctp_queued_to_read *ctl, *nctl; 6788 int cnt, strmat; 6789 uint32_t gap, i; 6790 int fnd = 0; 6791 6792 /* We look for anything larger than the cum-ack + 1 */ 6793 6794 asoc = &stcb->asoc; 6795 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6796 /* none we can reneg on. */ 6797 return; 6798 } 6799 SCTP_STAT_INCR(sctps_protocol_drains_done); 6800 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6801 cnt = 0; 6802 /* First look in the re-assembly queue */ 6803 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6804 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6805 /* Yep it is above cum-ack */ 6806 cnt++; 6807 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6808 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6809 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6810 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6811 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6812 if (chk->data) { 6813 sctp_m_freem(chk->data); 6814 chk->data = NULL; 6815 } 6816 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6817 } 6818 } 6819 /* Ok that was fun, now we will drain all the inbound streams? */ 6820 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6821 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6822 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6823 /* Yep it is above cum-ack */ 6824 cnt++; 6825 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6826 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6827 sctp_ucount_decr(asoc->cnt_on_all_streams); 6828 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6829 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6830 if (ctl->data) { 6831 sctp_m_freem(ctl->data); 6832 ctl->data = NULL; 6833 } 6834 sctp_free_remote_addr(ctl->whoFrom); 6835 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6836 SCTP_DECR_READQ_COUNT(); 6837 } 6838 } 6839 } 6840 if (cnt) { 6841 /* We must back down to see what the new highest is */ 6842 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6843 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6844 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6845 asoc->highest_tsn_inside_map = i; 6846 fnd = 1; 6847 break; 6848 } 6849 } 6850 if (!fnd) { 6851 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6852 } 6853 /* 6854 * Question, should we go through the delivery queue? The 6855 * only reason things are on here is the app not reading OR 6856 * a p-d-api up. An attacker COULD send enough in to 6857 * initiate the PD-API and then send a bunch of stuff to 6858 * other streams... these would wind up on the delivery 6859 * queue.. and then we would not get to them. But in order 6860 * to do this I then have to back-track and un-deliver 6861 * sequence numbers in streams.. el-yucko. I think for now 6862 * we will NOT look at the delivery queue and leave it to be 6863 * something to consider later. An alternative would be to 6864 * abort the P-D-API with a notification and then deliver 6865 * the data.... Or another method might be to keep track of 6866 * how many times the situation occurs and if we see a 6867 * possible attack underway just abort the association. 6868 */ 6869 #ifdef SCTP_DEBUG 6870 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6871 #endif 6872 /* 6873 * Now do we need to find a new 6874 * asoc->highest_tsn_inside_map? 6875 */ 6876 asoc->last_revoke_count = cnt; 6877 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6878 /* sa_ignore NO_NULL_CHK */ 6879 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6880 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6881 } 6882 /* 6883 * Another issue, in un-setting the TSN's in the mapping array we 6884 * DID NOT adjust the highest_tsn marker. This will cause one of 6885 * two things to occur. It may cause us to do extra work in checking 6886 * for our mapping array movement. More importantly it may cause us 6887 * to SACK every datagram. This may not be a bad thing though since 6888 * we will recover once we get our cum-ack above and all this stuff 6889 * we dumped recovered. 6890 */ 6891 } 6892 6893 void 6894 sctp_drain() 6895 { 6896 /* 6897 * We must walk the PCB lists for ALL associations here. The system 6898 * is LOW on MBUF's and needs help. This is where reneging will 6899 * occur. We really hope this does NOT happen! 6900 */ 6901 VNET_ITERATOR_DECL(vnet_iter); 6902 VNET_LIST_RLOCK_NOSLEEP(); 6903 VNET_FOREACH(vnet_iter) { 6904 CURVNET_SET(vnet_iter); 6905 struct sctp_inpcb *inp; 6906 struct sctp_tcb *stcb; 6907 6908 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6909 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6910 #ifdef VIMAGE 6911 continue; 6912 #else 6913 return; 6914 #endif 6915 } 6916 SCTP_INP_INFO_RLOCK(); 6917 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6918 /* For each endpoint */ 6919 SCTP_INP_RLOCK(inp); 6920 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6921 /* For each association */ 6922 SCTP_TCB_LOCK(stcb); 6923 sctp_drain_mbufs(stcb); 6924 SCTP_TCB_UNLOCK(stcb); 6925 } 6926 SCTP_INP_RUNLOCK(inp); 6927 } 6928 SCTP_INP_INFO_RUNLOCK(); 6929 CURVNET_RESTORE(); 6930 } 6931 VNET_LIST_RUNLOCK_NOSLEEP(); 6932 } 6933 6934 /* 6935 * start a new iterator 6936 * iterates through all endpoints and associations based on the pcb_state 6937 * flags and asoc_state. "af" (mandatory) is executed for all matching 6938 * assocs and "ef" (optional) is executed when the iterator completes. 6939 * "inpf" (optional) is executed for each new endpoint as it is being 6940 * iterated through. inpe (optional) is called when the inp completes 6941 * its way through all the stcbs. 6942 */ 6943 int 6944 sctp_initiate_iterator(inp_func inpf, 6945 asoc_func af, 6946 inp_func inpe, 6947 uint32_t pcb_state, 6948 uint32_t pcb_features, 6949 uint32_t asoc_state, 6950 void *argp, 6951 uint32_t argi, 6952 end_func ef, 6953 struct sctp_inpcb *s_inp, 6954 uint8_t chunk_output_off) 6955 { 6956 struct sctp_iterator *it = NULL; 6957 6958 if (af == NULL) { 6959 return (-1); 6960 } 6961 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6962 SCTP_M_ITER); 6963 if (it == NULL) { 6964 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6965 return (ENOMEM); 6966 } 6967 memset(it, 0, sizeof(*it)); 6968 it->function_assoc = af; 6969 it->function_inp = inpf; 6970 if (inpf) 6971 it->done_current_ep = 0; 6972 else 6973 it->done_current_ep = 1; 6974 it->function_atend = ef; 6975 it->pointer = argp; 6976 it->val = argi; 6977 it->pcb_flags = pcb_state; 6978 it->pcb_features = pcb_features; 6979 it->asoc_state = asoc_state; 6980 it->function_inp_end = inpe; 6981 it->no_chunk_output = chunk_output_off; 6982 it->vn = curvnet; 6983 if (s_inp) { 6984 /* Assume lock is held here */ 6985 it->inp = s_inp; 6986 SCTP_INP_INCR_REF(it->inp); 6987 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6988 } else { 6989 SCTP_INP_INFO_RLOCK(); 6990 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6991 if (it->inp) { 6992 SCTP_INP_INCR_REF(it->inp); 6993 } 6994 SCTP_INP_INFO_RUNLOCK(); 6995 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6996 6997 } 6998 SCTP_IPI_ITERATOR_WQ_LOCK(); 6999 7000 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7001 if (sctp_it_ctl.iterator_running == 0) { 7002 sctp_wakeup_iterator(); 7003 } 7004 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7005 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7006 return (0); 7007 } 7008