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 98 SCTP_INP_INFO_RUNLOCK(); 99 } 100 101 /* 102 * Addresses are added to VRF's (Virtual Router's). For BSD we 103 * have only the default VRF 0. We maintain a hash list of 104 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 105 * these has a list of addresses. When we add a new address 106 * to a VRF we lookup the ifn/ifn_index, if the ifn does 107 * not exist we create it and add it to the list of IFN's 108 * within the VRF. Once we have the sctp_ifn, we add the 109 * address to the list. So we look something like: 110 * 111 * hash-vrf-table 112 * vrf-> ifn-> ifn -> ifn 113 * vrf | 114 * ... +--ifa-> ifa -> ifa 115 * vrf 116 * 117 * We keep these separate lists since the SCTP subsystem will 118 * point to these from its source address selection nets structure. 119 * When an address is deleted it does not happen right away on 120 * the SCTP side, it gets scheduled. What we do when a 121 * delete happens is immediately remove the address from 122 * the master list and decrement the refcount. As our 123 * addip iterator works through and frees the src address 124 * selection pointing to the sctp_ifa, eventually the refcount 125 * will reach 0 and we will delete it. Note that it is assumed 126 * that any locking on system level ifn/ifa is done at the 127 * caller of these functions and these routines will only 128 * lock the SCTP structures as they add or delete things. 129 * 130 * Other notes on VRF concepts. 131 * - An endpoint can be in multiple VRF's 132 * - An association lives within a VRF and only one VRF. 133 * - Any incoming packet we can deduce the VRF for by 134 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 135 * - Any downward send call or connect call must supply the 136 * VRF via ancillary data or via some sort of set default 137 * VRF socket option call (again for BSD no brainer since 138 * the VRF is always 0). 139 * - An endpoint may add multiple VRF's to it. 140 * - Listening sockets can accept associations in any 141 * of the VRF's they are in but the assoc will end up 142 * in only one VRF (gotten from the packet or connect/send). 143 * 144 */ 145 146 struct sctp_vrf * 147 sctp_allocate_vrf(int vrf_id) 148 { 149 struct sctp_vrf *vrf = NULL; 150 struct sctp_vrflist *bucket; 151 152 /* First allocate the VRF structure */ 153 vrf = sctp_find_vrf(vrf_id); 154 if (vrf) { 155 /* Already allocated */ 156 return (vrf); 157 } 158 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 159 SCTP_M_VRF); 160 if (vrf == NULL) { 161 /* No memory */ 162 #ifdef INVARIANTS 163 panic("No memory for VRF:%d", vrf_id); 164 #endif 165 return (NULL); 166 } 167 /* setup the VRF */ 168 memset(vrf, 0, sizeof(struct sctp_vrf)); 169 vrf->vrf_id = vrf_id; 170 LIST_INIT(&vrf->ifnlist); 171 vrf->total_ifa_count = 0; 172 vrf->refcount = 0; 173 /* now also setup table ids */ 174 SCTP_INIT_VRF_TABLEID(vrf); 175 /* Init the HASH of addresses */ 176 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 177 &vrf->vrf_addr_hashmark); 178 if (vrf->vrf_addr_hash == NULL) { 179 /* No memory */ 180 #ifdef INVARIANTS 181 panic("No memory for VRF:%d", vrf_id); 182 #endif 183 SCTP_FREE(vrf, SCTP_M_VRF); 184 return (NULL); 185 } 186 /* Add it to the hash table */ 187 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 188 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 189 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 190 return (vrf); 191 } 192 193 194 struct sctp_ifn * 195 sctp_find_ifn(void *ifn, uint32_t ifn_index) 196 { 197 struct sctp_ifn *sctp_ifnp; 198 struct sctp_ifnlist *hash_ifn_head; 199 200 /* 201 * We assume the lock is held for the addresses if that's wrong 202 * problems could occur :-) 203 */ 204 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 205 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 206 if (sctp_ifnp->ifn_index == ifn_index) { 207 return (sctp_ifnp); 208 } 209 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 210 return (sctp_ifnp); 211 } 212 } 213 return (NULL); 214 } 215 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 void 234 sctp_free_vrf(struct sctp_vrf *vrf) 235 { 236 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 237 if (vrf->vrf_addr_hash) { 238 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 239 vrf->vrf_addr_hash = NULL; 240 } 241 /* We zero'd the count */ 242 LIST_REMOVE(vrf, next_vrf); 243 SCTP_FREE(vrf, SCTP_M_VRF); 244 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 245 } 246 } 247 248 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 void 262 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 263 { 264 struct sctp_ifn *sctp_ifnp; 265 266 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 267 if (sctp_ifnp != NULL) { 268 sctp_ifnp->ifn_mtu = mtu; 269 } 270 } 271 272 273 void 274 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 275 { 276 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 277 /* We zero'd the count */ 278 if (sctp_ifap->ifn_p) { 279 sctp_free_ifn(sctp_ifap->ifn_p); 280 } 281 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 282 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 283 } 284 } 285 286 static void 287 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 288 { 289 struct sctp_ifn *found; 290 291 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 292 if (found == NULL) { 293 /* Not in the list.. sorry */ 294 return; 295 } 296 if (hold_addr_lock == 0) 297 SCTP_IPI_ADDR_WLOCK(); 298 LIST_REMOVE(sctp_ifnp, next_bucket); 299 LIST_REMOVE(sctp_ifnp, next_ifn); 300 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 301 sctp_ifnp->registered_af); 302 if (hold_addr_lock == 0) 303 SCTP_IPI_ADDR_WUNLOCK(); 304 /* Take away the reference, and possibly free it */ 305 sctp_free_ifn(sctp_ifnp); 306 } 307 308 void 309 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 310 const char *if_name, uint32_t ifn_index) 311 { 312 struct sctp_vrf *vrf; 313 struct sctp_ifa *sctp_ifap = NULL; 314 315 SCTP_IPI_ADDR_RLOCK(); 316 vrf = sctp_find_vrf(vrf_id); 317 if (vrf == NULL) { 318 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 319 goto out; 320 321 } 322 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 323 if (sctp_ifap == NULL) { 324 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 325 goto out; 326 } 327 if (sctp_ifap->ifn_p == NULL) { 328 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 329 goto out; 330 } 331 if (if_name) { 332 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 334 sctp_ifap->ifn_p->ifn_name, if_name); 335 goto out; 336 } 337 } else { 338 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 340 sctp_ifap->ifn_p->ifn_index, ifn_index); 341 goto out; 342 } 343 } 344 345 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 346 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 347 out: 348 SCTP_IPI_ADDR_RUNLOCK(); 349 } 350 351 void 352 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 353 const char *if_name, uint32_t ifn_index) 354 { 355 struct sctp_vrf *vrf; 356 struct sctp_ifa *sctp_ifap = NULL; 357 358 SCTP_IPI_ADDR_RLOCK(); 359 vrf = sctp_find_vrf(vrf_id); 360 if (vrf == NULL) { 361 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 362 goto out; 363 364 } 365 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 366 if (sctp_ifap == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 368 goto out; 369 } 370 if (sctp_ifap->ifn_p == NULL) { 371 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 372 goto out; 373 } 374 if (if_name) { 375 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 376 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 377 sctp_ifap->ifn_p->ifn_name, if_name); 378 goto out; 379 } 380 } else { 381 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 383 sctp_ifap->ifn_p->ifn_index, ifn_index); 384 goto out; 385 } 386 } 387 388 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 389 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 390 out: 391 SCTP_IPI_ADDR_RUNLOCK(); 392 } 393 394 /*- 395 * Add an ifa to an ifn. 396 * Register the interface as necessary. 397 * NOTE: ADDR write lock MUST be held. 398 */ 399 static void 400 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 401 { 402 int ifa_af; 403 404 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 405 sctp_ifap->ifn_p = sctp_ifnp; 406 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 407 /* update address counts */ 408 sctp_ifnp->ifa_count++; 409 ifa_af = sctp_ifap->address.sa.sa_family; 410 switch (ifa_af) { 411 #ifdef INET 412 case AF_INET: 413 sctp_ifnp->num_v4++; 414 break; 415 #endif 416 #ifdef INET6 417 case AF_INET6: 418 sctp_ifnp->num_v6++; 419 break; 420 #endif 421 default: 422 break; 423 } 424 if (sctp_ifnp->ifa_count == 1) { 425 /* register the new interface */ 426 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 427 sctp_ifnp->registered_af = ifa_af; 428 } 429 } 430 431 /*- 432 * Remove an ifa from its ifn. 433 * If no more addresses exist, remove the ifn too. Otherwise, re-register 434 * the interface based on the remaining address families left. 435 * NOTE: ADDR write lock MUST be held. 436 */ 437 static void 438 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 439 { 440 LIST_REMOVE(sctp_ifap, next_ifa); 441 if (sctp_ifap->ifn_p) { 442 /* update address counts */ 443 sctp_ifap->ifn_p->ifa_count--; 444 switch (sctp_ifap->address.sa.sa_family) { 445 #ifdef INET 446 case AF_INET: 447 sctp_ifap->ifn_p->num_v4--; 448 break; 449 #endif 450 #ifdef INET6 451 case AF_INET6: 452 sctp_ifap->ifn_p->num_v6--; 453 break; 454 #endif 455 default: 456 break; 457 } 458 459 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 460 /* remove the ifn, possibly freeing it */ 461 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 462 } else { 463 /* re-register address family type, if needed */ 464 if ((sctp_ifap->ifn_p->num_v6 == 0) && 465 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 466 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 467 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 468 sctp_ifap->ifn_p->registered_af = AF_INET; 469 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 470 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 471 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 472 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 473 sctp_ifap->ifn_p->registered_af = AF_INET6; 474 } 475 /* free the ifn refcount */ 476 sctp_free_ifn(sctp_ifap->ifn_p); 477 } 478 sctp_ifap->ifn_p = NULL; 479 } 480 } 481 482 struct sctp_ifa * 483 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 484 uint32_t ifn_type, const char *if_name, void *ifa, 485 struct sockaddr *addr, uint32_t ifa_flags, 486 int dynamic_add) 487 { 488 struct sctp_vrf *vrf; 489 struct sctp_ifn *sctp_ifnp = NULL; 490 struct sctp_ifa *sctp_ifap = NULL; 491 struct sctp_ifalist *hash_addr_head; 492 struct sctp_ifnlist *hash_ifn_head; 493 uint32_t hash_of_addr; 494 int new_ifn_af = 0; 495 496 #ifdef SCTP_DEBUG 497 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 498 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 499 #endif 500 SCTP_IPI_ADDR_WLOCK(); 501 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 502 if (sctp_ifnp) { 503 vrf = sctp_ifnp->vrf; 504 } else { 505 vrf = sctp_find_vrf(vrf_id); 506 if (vrf == NULL) { 507 vrf = sctp_allocate_vrf(vrf_id); 508 if (vrf == NULL) { 509 SCTP_IPI_ADDR_WUNLOCK(); 510 return (NULL); 511 } 512 } 513 } 514 if (sctp_ifnp == NULL) { 515 /* 516 * build one and add it, can't hold lock until after malloc 517 * done though. 518 */ 519 SCTP_IPI_ADDR_WUNLOCK(); 520 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 521 sizeof(struct sctp_ifn), SCTP_M_IFN); 522 if (sctp_ifnp == NULL) { 523 #ifdef INVARIANTS 524 panic("No memory for IFN"); 525 #endif 526 return (NULL); 527 } 528 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 529 sctp_ifnp->ifn_index = ifn_index; 530 sctp_ifnp->ifn_p = ifn; 531 sctp_ifnp->ifn_type = ifn_type; 532 sctp_ifnp->refcount = 0; 533 sctp_ifnp->vrf = vrf; 534 atomic_add_int(&vrf->refcount, 1); 535 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 536 if (if_name != NULL) { 537 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 538 } else { 539 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 540 } 541 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 542 LIST_INIT(&sctp_ifnp->ifalist); 543 SCTP_IPI_ADDR_WLOCK(); 544 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 545 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 546 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 547 new_ifn_af = 1; 548 } 549 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 550 if (sctp_ifap) { 551 /* Hmm, it already exists? */ 552 if ((sctp_ifap->ifn_p) && 553 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 554 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 555 sctp_ifap->ifn_p->ifn_name, ifn_index, 556 (void *)sctp_ifap); 557 if (new_ifn_af) { 558 /* Remove the created one that we don't want */ 559 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 560 } 561 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 562 /* easy to solve, just switch back to active */ 563 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 564 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 565 sctp_ifap->ifn_p = sctp_ifnp; 566 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 567 } 568 exit_stage_left: 569 SCTP_IPI_ADDR_WUNLOCK(); 570 return (sctp_ifap); 571 } else { 572 if (sctp_ifap->ifn_p) { 573 /* 574 * The last IFN gets the address, remove the 575 * old one 576 */ 577 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 578 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 579 sctp_ifap->ifn_p->ifn_index, if_name, 580 ifn_index); 581 /* remove the address from the old ifn */ 582 sctp_remove_ifa_from_ifn(sctp_ifap); 583 /* move the address over to the new ifn */ 584 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 585 goto exit_stage_left; 586 } else { 587 /* repair ifnp which was NULL ? */ 588 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 589 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 590 (void *)sctp_ifnp, (void *)sctp_ifap); 591 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 592 } 593 goto exit_stage_left; 594 } 595 } 596 SCTP_IPI_ADDR_WUNLOCK(); 597 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 598 if (sctp_ifap == NULL) { 599 #ifdef INVARIANTS 600 panic("No memory for IFA"); 601 #endif 602 return (NULL); 603 } 604 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 605 sctp_ifap->ifn_p = sctp_ifnp; 606 atomic_add_int(&sctp_ifnp->refcount, 1); 607 sctp_ifap->vrf_id = vrf_id; 608 sctp_ifap->ifa = ifa; 609 memcpy(&sctp_ifap->address, addr, addr->sa_len); 610 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 611 sctp_ifap->flags = ifa_flags; 612 /* Set scope */ 613 switch (sctp_ifap->address.sa.sa_family) { 614 #ifdef INET 615 case AF_INET: 616 { 617 struct sockaddr_in *sin; 618 619 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 620 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 621 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 622 sctp_ifap->src_is_loop = 1; 623 } 624 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 625 sctp_ifap->src_is_priv = 1; 626 } 627 sctp_ifnp->num_v4++; 628 if (new_ifn_af) 629 new_ifn_af = AF_INET; 630 break; 631 } 632 #endif 633 #ifdef INET6 634 case AF_INET6: 635 { 636 /* ok to use deprecated addresses? */ 637 struct sockaddr_in6 *sin6; 638 639 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 640 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 641 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 642 sctp_ifap->src_is_loop = 1; 643 } 644 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 645 sctp_ifap->src_is_priv = 1; 646 } 647 sctp_ifnp->num_v6++; 648 if (new_ifn_af) 649 new_ifn_af = AF_INET6; 650 break; 651 } 652 #endif 653 default: 654 new_ifn_af = 0; 655 break; 656 } 657 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 658 659 if ((sctp_ifap->src_is_priv == 0) && 660 (sctp_ifap->src_is_loop == 0)) { 661 sctp_ifap->src_is_glob = 1; 662 } 663 SCTP_IPI_ADDR_WLOCK(); 664 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 665 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 666 sctp_ifap->refcount = 1; 667 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 668 sctp_ifnp->ifa_count++; 669 vrf->total_ifa_count++; 670 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 671 if (new_ifn_af) { 672 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 673 sctp_ifnp->registered_af = new_ifn_af; 674 } 675 SCTP_IPI_ADDR_WUNLOCK(); 676 if (dynamic_add) { 677 /* 678 * Bump up the refcount so that when the timer completes it 679 * will drop back down. 680 */ 681 struct sctp_laddr *wi; 682 683 atomic_add_int(&sctp_ifap->refcount, 1); 684 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 685 if (wi == NULL) { 686 /* 687 * Gak, what can we do? We have lost an address 688 * change can you say HOSED? 689 */ 690 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 691 /* Opps, must decrement the count */ 692 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 693 if_name); 694 return (NULL); 695 } 696 SCTP_INCR_LADDR_COUNT(); 697 bzero(wi, sizeof(*wi)); 698 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 699 wi->ifa = sctp_ifap; 700 wi->action = SCTP_ADD_IP_ADDRESS; 701 702 SCTP_WQ_ADDR_LOCK(); 703 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 704 SCTP_WQ_ADDR_UNLOCK(); 705 706 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 707 (struct sctp_inpcb *)NULL, 708 (struct sctp_tcb *)NULL, 709 (struct sctp_nets *)NULL); 710 } else { 711 /* it's ready for use */ 712 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 713 } 714 return (sctp_ifap); 715 } 716 717 void 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 719 uint32_t ifn_index, const char *if_name) 720 { 721 struct sctp_vrf *vrf; 722 struct sctp_ifa *sctp_ifap = NULL; 723 724 SCTP_IPI_ADDR_WLOCK(); 725 vrf = sctp_find_vrf(vrf_id); 726 if (vrf == NULL) { 727 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 728 goto out_now; 729 } 730 #ifdef SCTP_DEBUG 731 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 732 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 733 #endif 734 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 735 if (sctp_ifap) { 736 /* Validate the delete */ 737 if (sctp_ifap->ifn_p) { 738 int valid = 0; 739 740 /*- 741 * The name has priority over the ifn_index 742 * if its given. We do this especially for 743 * panda who might recycle indexes fast. 744 */ 745 if (if_name) { 746 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 747 /* They match its a correct delete */ 748 valid = 1; 749 } 750 } 751 if (!valid) { 752 /* last ditch check ifn_index */ 753 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 754 valid = 1; 755 } 756 } 757 if (!valid) { 758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 759 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 760 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 761 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 762 SCTP_IPI_ADDR_WUNLOCK(); 763 return; 764 } 765 } 766 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 767 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 768 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 769 vrf->total_ifa_count--; 770 LIST_REMOVE(sctp_ifap, next_bucket); 771 sctp_remove_ifa_from_ifn(sctp_ifap); 772 } 773 #ifdef SCTP_DEBUG 774 else { 775 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 776 ifn_index); 777 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 778 } 779 #endif 780 781 out_now: 782 SCTP_IPI_ADDR_WUNLOCK(); 783 if (sctp_ifap) { 784 struct sctp_laddr *wi; 785 786 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 787 if (wi == NULL) { 788 /* 789 * Gak, what can we do? We have lost an address 790 * change can you say HOSED? 791 */ 792 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 793 794 /* Oops, must decrement the count */ 795 sctp_free_ifa(sctp_ifap); 796 return; 797 } 798 SCTP_INCR_LADDR_COUNT(); 799 bzero(wi, sizeof(*wi)); 800 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 801 wi->ifa = sctp_ifap; 802 wi->action = SCTP_DEL_IP_ADDRESS; 803 SCTP_WQ_ADDR_LOCK(); 804 /* 805 * Should this really be a tailq? As it is we will process 806 * the newest first :-0 807 */ 808 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 809 SCTP_WQ_ADDR_UNLOCK(); 810 811 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 812 (struct sctp_inpcb *)NULL, 813 (struct sctp_tcb *)NULL, 814 (struct sctp_nets *)NULL); 815 } 816 return; 817 } 818 819 820 static struct sctp_tcb * 821 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 822 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 823 { 824 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 825 /* 826 * If we support the TCP model, then we must now dig through to see 827 * if we can find our endpoint in the list of tcp ep's. 828 */ 829 uint16_t lport, rport; 830 struct sctppcbhead *ephead; 831 struct sctp_inpcb *inp; 832 struct sctp_laddr *laddr; 833 struct sctp_tcb *stcb; 834 struct sctp_nets *net; 835 836 if ((to == NULL) || (from == NULL)) { 837 return (NULL); 838 } 839 switch (to->sa_family) { 840 #ifdef INET 841 case AF_INET: 842 if (from->sa_family == AF_INET) { 843 lport = ((struct sockaddr_in *)to)->sin_port; 844 rport = ((struct sockaddr_in *)from)->sin_port; 845 } else { 846 return (NULL); 847 } 848 break; 849 #endif 850 #ifdef INET6 851 case AF_INET6: 852 if (from->sa_family == AF_INET6) { 853 lport = ((struct sockaddr_in6 *)to)->sin6_port; 854 rport = ((struct sockaddr_in6 *)from)->sin6_port; 855 } else { 856 return (NULL); 857 } 858 break; 859 #endif 860 default: 861 return (NULL); 862 } 863 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 864 /* 865 * Ok now for each of the guys in this bucket we must look and see: 866 * - Does the remote port match. - Does there single association's 867 * addresses match this address (to). If so we update p_ep to point 868 * to this ep and return the tcb from it. 869 */ 870 LIST_FOREACH(inp, ephead, sctp_hash) { 871 SCTP_INP_RLOCK(inp); 872 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 873 SCTP_INP_RUNLOCK(inp); 874 continue; 875 } 876 if (lport != inp->sctp_lport) { 877 SCTP_INP_RUNLOCK(inp); 878 continue; 879 } 880 if (inp->def_vrf_id != vrf_id) { 881 SCTP_INP_RUNLOCK(inp); 882 continue; 883 } 884 /* check to see if the ep has one of the addresses */ 885 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 886 /* We are NOT bound all, so look further */ 887 int match = 0; 888 889 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 890 891 if (laddr->ifa == NULL) { 892 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 893 continue; 894 } 895 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 896 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 897 continue; 898 } 899 if (laddr->ifa->address.sa.sa_family == 900 to->sa_family) { 901 /* see if it matches */ 902 903 #ifdef INET 904 if (from->sa_family == AF_INET) { 905 struct sockaddr_in *intf_addr, 906 *sin; 907 908 intf_addr = &laddr->ifa->address.sin; 909 sin = (struct sockaddr_in *)to; 910 if (sin->sin_addr.s_addr == 911 intf_addr->sin_addr.s_addr) { 912 match = 1; 913 break; 914 } 915 } 916 #endif 917 #ifdef INET6 918 if (from->sa_family == AF_INET6) { 919 struct sockaddr_in6 *intf_addr6; 920 struct sockaddr_in6 *sin6; 921 922 sin6 = (struct sockaddr_in6 *) 923 to; 924 intf_addr6 = &laddr->ifa->address.sin6; 925 926 if (SCTP6_ARE_ADDR_EQUAL(sin6, 927 intf_addr6)) { 928 match = 1; 929 break; 930 } 931 } 932 #endif 933 } 934 } 935 if (match == 0) { 936 /* This endpoint does not have this address */ 937 SCTP_INP_RUNLOCK(inp); 938 continue; 939 } 940 } 941 /* 942 * Ok if we hit here the ep has the address, does it hold 943 * the tcb? 944 */ 945 946 stcb = LIST_FIRST(&inp->sctp_asoc_list); 947 if (stcb == NULL) { 948 SCTP_INP_RUNLOCK(inp); 949 continue; 950 } 951 SCTP_TCB_LOCK(stcb); 952 if (stcb->rport != rport) { 953 /* remote port does not match. */ 954 SCTP_TCB_UNLOCK(stcb); 955 SCTP_INP_RUNLOCK(inp); 956 continue; 957 } 958 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 959 SCTP_TCB_UNLOCK(stcb); 960 SCTP_INP_RUNLOCK(inp); 961 continue; 962 } 963 /* Does this TCB have a matching address? */ 964 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 965 966 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 967 /* not the same family, can't be a match */ 968 continue; 969 } 970 switch (from->sa_family) { 971 #ifdef INET 972 case AF_INET: 973 { 974 struct sockaddr_in *sin, *rsin; 975 976 sin = (struct sockaddr_in *)&net->ro._l_addr; 977 rsin = (struct sockaddr_in *)from; 978 if (sin->sin_addr.s_addr == 979 rsin->sin_addr.s_addr) { 980 /* found it */ 981 if (netp != NULL) { 982 *netp = net; 983 } 984 /* 985 * Update the endpoint 986 * pointer 987 */ 988 *inp_p = inp; 989 SCTP_INP_RUNLOCK(inp); 990 return (stcb); 991 } 992 break; 993 } 994 #endif 995 #ifdef INET6 996 case AF_INET6: 997 { 998 struct sockaddr_in6 *sin6, *rsin6; 999 1000 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1001 rsin6 = (struct sockaddr_in6 *)from; 1002 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1003 rsin6)) { 1004 /* found it */ 1005 if (netp != NULL) { 1006 *netp = net; 1007 } 1008 /* 1009 * Update the endpoint 1010 * pointer 1011 */ 1012 *inp_p = inp; 1013 SCTP_INP_RUNLOCK(inp); 1014 return (stcb); 1015 } 1016 break; 1017 } 1018 #endif 1019 default: 1020 /* TSNH */ 1021 break; 1022 } 1023 } 1024 SCTP_TCB_UNLOCK(stcb); 1025 SCTP_INP_RUNLOCK(inp); 1026 } 1027 return (NULL); 1028 } 1029 1030 static int 1031 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1032 { 1033 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1034 int ipv4_addr_legal, ipv6_addr_legal; 1035 struct sctp_vrf *vrf; 1036 struct sctp_ifn *sctp_ifn; 1037 struct sctp_ifa *sctp_ifa; 1038 1039 loopback_scope = stcb->asoc.loopback_scope; 1040 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1041 local_scope = stcb->asoc.local_scope; 1042 site_scope = stcb->asoc.site_scope; 1043 ipv4_addr_legal = ipv6_addr_legal = 0; 1044 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1045 ipv6_addr_legal = 1; 1046 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1047 ipv4_addr_legal = 1; 1048 } 1049 } else { 1050 ipv4_addr_legal = 1; 1051 } 1052 1053 SCTP_IPI_ADDR_RLOCK(); 1054 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1055 if (vrf == NULL) { 1056 /* no vrf, no addresses */ 1057 SCTP_IPI_ADDR_RUNLOCK(); 1058 return (0); 1059 } 1060 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1061 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1062 if ((loopback_scope == 0) && 1063 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1064 continue; 1065 } 1066 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1067 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 1068 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 1069 /* 1070 * We allow pending addresses, where 1071 * we have sent an asconf-add to be 1072 * considered valid. 1073 */ 1074 continue; 1075 } 1076 switch (sctp_ifa->address.sa.sa_family) { 1077 #ifdef INET 1078 case AF_INET: 1079 if (ipv4_addr_legal) { 1080 struct sockaddr_in *sin, 1081 *rsin; 1082 1083 sin = &sctp_ifa->address.sin; 1084 rsin = (struct sockaddr_in *)to; 1085 if ((ipv4_local_scope == 0) && 1086 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1087 continue; 1088 } 1089 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1090 SCTP_IPI_ADDR_RUNLOCK(); 1091 return (1); 1092 } 1093 } 1094 break; 1095 #endif 1096 #ifdef INET6 1097 case AF_INET6: 1098 if (ipv6_addr_legal) { 1099 struct sockaddr_in6 *sin6, 1100 *rsin6; 1101 1102 sin6 = &sctp_ifa->address.sin6; 1103 rsin6 = (struct sockaddr_in6 *)to; 1104 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1105 if (local_scope == 0) 1106 continue; 1107 if (sin6->sin6_scope_id == 0) { 1108 if (sa6_recoverscope(sin6) != 0) 1109 continue; 1110 } 1111 } 1112 if ((site_scope == 0) && 1113 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1114 continue; 1115 } 1116 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1117 SCTP_IPI_ADDR_RUNLOCK(); 1118 return (1); 1119 } 1120 } 1121 break; 1122 #endif 1123 default: 1124 /* TSNH */ 1125 break; 1126 } 1127 } 1128 } 1129 } else { 1130 struct sctp_laddr *laddr; 1131 1132 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1133 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 1134 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 1135 /* 1136 * We allow pending addresses, where we have 1137 * sent an asconf-add to be considered 1138 * valid. 1139 */ 1140 continue; 1141 } 1142 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1143 continue; 1144 } 1145 switch (to->sa_family) { 1146 #ifdef INET 1147 case AF_INET: 1148 { 1149 struct sockaddr_in *sin, *rsin; 1150 1151 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1152 rsin = (struct sockaddr_in *)to; 1153 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1154 SCTP_IPI_ADDR_RUNLOCK(); 1155 return (1); 1156 } 1157 break; 1158 } 1159 #endif 1160 #ifdef INET6 1161 case AF_INET6: 1162 { 1163 struct sockaddr_in6 *sin6, *rsin6; 1164 1165 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1166 rsin6 = (struct sockaddr_in6 *)to; 1167 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1168 SCTP_IPI_ADDR_RUNLOCK(); 1169 return (1); 1170 } 1171 break; 1172 } 1173 1174 #endif 1175 default: 1176 /* TSNH */ 1177 break; 1178 } 1179 1180 } 1181 } 1182 SCTP_IPI_ADDR_RUNLOCK(); 1183 return (0); 1184 } 1185 1186 /* 1187 * rules for use 1188 * 1189 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1190 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1191 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1192 * NULL. 1193 */ 1194 1195 struct sctp_tcb * 1196 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1197 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1198 { 1199 struct sctpasochead *head; 1200 struct sctp_inpcb *inp; 1201 struct sctp_tcb *stcb = NULL; 1202 struct sctp_nets *net; 1203 uint16_t rport; 1204 1205 inp = *inp_p; 1206 switch (remote->sa_family) { 1207 #ifdef INET 1208 case AF_INET: 1209 rport = (((struct sockaddr_in *)remote)->sin_port); 1210 break; 1211 #endif 1212 #ifdef INET6 1213 case AF_INET6: 1214 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1215 break; 1216 #endif 1217 default: 1218 return (NULL); 1219 } 1220 if (locked_tcb) { 1221 /* 1222 * UN-lock so we can do proper locking here this occurs when 1223 * called from load_addresses_from_init. 1224 */ 1225 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1226 SCTP_TCB_UNLOCK(locked_tcb); 1227 } 1228 SCTP_INP_INFO_RLOCK(); 1229 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1230 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1231 /*- 1232 * Now either this guy is our listener or it's the 1233 * connector. If it is the one that issued the connect, then 1234 * it's only chance is to be the first TCB in the list. If 1235 * it is the acceptor, then do the special_lookup to hash 1236 * and find the real inp. 1237 */ 1238 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1239 /* to is peer addr, from is my addr */ 1240 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1241 netp, inp->def_vrf_id); 1242 if ((stcb != NULL) && (locked_tcb == NULL)) { 1243 /* we have a locked tcb, lower refcount */ 1244 SCTP_INP_DECR_REF(inp); 1245 } 1246 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1247 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1248 SCTP_TCB_LOCK(locked_tcb); 1249 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1250 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1251 } 1252 SCTP_INP_INFO_RUNLOCK(); 1253 return (stcb); 1254 } else { 1255 SCTP_INP_WLOCK(inp); 1256 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1257 goto null_return; 1258 } 1259 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1260 if (stcb == NULL) { 1261 goto null_return; 1262 } 1263 SCTP_TCB_LOCK(stcb); 1264 1265 if (stcb->rport != rport) { 1266 /* remote port does not match. */ 1267 SCTP_TCB_UNLOCK(stcb); 1268 goto null_return; 1269 } 1270 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1271 SCTP_TCB_UNLOCK(stcb); 1272 goto null_return; 1273 } 1274 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1275 SCTP_TCB_UNLOCK(stcb); 1276 goto null_return; 1277 } 1278 /* now look at the list of remote addresses */ 1279 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1280 #ifdef INVARIANTS 1281 if (net == (TAILQ_NEXT(net, sctp_next))) { 1282 panic("Corrupt net list"); 1283 } 1284 #endif 1285 if (net->ro._l_addr.sa.sa_family != 1286 remote->sa_family) { 1287 /* not the same family */ 1288 continue; 1289 } 1290 switch (remote->sa_family) { 1291 #ifdef INET 1292 case AF_INET: 1293 { 1294 struct sockaddr_in *sin, 1295 *rsin; 1296 1297 sin = (struct sockaddr_in *) 1298 &net->ro._l_addr; 1299 rsin = (struct sockaddr_in *)remote; 1300 if (sin->sin_addr.s_addr == 1301 rsin->sin_addr.s_addr) { 1302 /* found it */ 1303 if (netp != NULL) { 1304 *netp = net; 1305 } 1306 if (locked_tcb == NULL) { 1307 SCTP_INP_DECR_REF(inp); 1308 } else if (locked_tcb != stcb) { 1309 SCTP_TCB_LOCK(locked_tcb); 1310 } 1311 if (locked_tcb) { 1312 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1313 } 1314 SCTP_INP_WUNLOCK(inp); 1315 SCTP_INP_INFO_RUNLOCK(); 1316 return (stcb); 1317 } 1318 break; 1319 } 1320 #endif 1321 #ifdef INET6 1322 case AF_INET6: 1323 { 1324 struct sockaddr_in6 *sin6, 1325 *rsin6; 1326 1327 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1328 rsin6 = (struct sockaddr_in6 *)remote; 1329 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1330 rsin6)) { 1331 /* found it */ 1332 if (netp != NULL) { 1333 *netp = net; 1334 } 1335 if (locked_tcb == NULL) { 1336 SCTP_INP_DECR_REF(inp); 1337 } else if (locked_tcb != stcb) { 1338 SCTP_TCB_LOCK(locked_tcb); 1339 } 1340 if (locked_tcb) { 1341 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1342 } 1343 SCTP_INP_WUNLOCK(inp); 1344 SCTP_INP_INFO_RUNLOCK(); 1345 return (stcb); 1346 } 1347 break; 1348 } 1349 #endif 1350 default: 1351 /* TSNH */ 1352 break; 1353 } 1354 } 1355 SCTP_TCB_UNLOCK(stcb); 1356 } 1357 } else { 1358 SCTP_INP_WLOCK(inp); 1359 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1360 goto null_return; 1361 } 1362 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1363 inp->sctp_hashmark)]; 1364 if (head == NULL) { 1365 goto null_return; 1366 } 1367 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1368 if (stcb->rport != rport) { 1369 /* remote port does not match */ 1370 continue; 1371 } 1372 SCTP_TCB_LOCK(stcb); 1373 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1374 SCTP_TCB_UNLOCK(stcb); 1375 continue; 1376 } 1377 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1378 SCTP_TCB_UNLOCK(stcb); 1379 continue; 1380 } 1381 /* now look at the list of remote addresses */ 1382 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1383 #ifdef INVARIANTS 1384 if (net == (TAILQ_NEXT(net, sctp_next))) { 1385 panic("Corrupt net list"); 1386 } 1387 #endif 1388 if (net->ro._l_addr.sa.sa_family != 1389 remote->sa_family) { 1390 /* not the same family */ 1391 continue; 1392 } 1393 switch (remote->sa_family) { 1394 #ifdef INET 1395 case AF_INET: 1396 { 1397 struct sockaddr_in *sin, 1398 *rsin; 1399 1400 sin = (struct sockaddr_in *) 1401 &net->ro._l_addr; 1402 rsin = (struct sockaddr_in *)remote; 1403 if (sin->sin_addr.s_addr == 1404 rsin->sin_addr.s_addr) { 1405 /* found it */ 1406 if (netp != NULL) { 1407 *netp = net; 1408 } 1409 if (locked_tcb == NULL) { 1410 SCTP_INP_DECR_REF(inp); 1411 } else if (locked_tcb != stcb) { 1412 SCTP_TCB_LOCK(locked_tcb); 1413 } 1414 if (locked_tcb) { 1415 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1416 } 1417 SCTP_INP_WUNLOCK(inp); 1418 SCTP_INP_INFO_RUNLOCK(); 1419 return (stcb); 1420 } 1421 break; 1422 } 1423 #endif 1424 #ifdef INET6 1425 case AF_INET6: 1426 { 1427 struct sockaddr_in6 *sin6, 1428 *rsin6; 1429 1430 sin6 = (struct sockaddr_in6 *) 1431 &net->ro._l_addr; 1432 rsin6 = (struct sockaddr_in6 *)remote; 1433 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1434 rsin6)) { 1435 /* found it */ 1436 if (netp != NULL) { 1437 *netp = net; 1438 } 1439 if (locked_tcb == NULL) { 1440 SCTP_INP_DECR_REF(inp); 1441 } else if (locked_tcb != stcb) { 1442 SCTP_TCB_LOCK(locked_tcb); 1443 } 1444 if (locked_tcb) { 1445 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1446 } 1447 SCTP_INP_WUNLOCK(inp); 1448 SCTP_INP_INFO_RUNLOCK(); 1449 return (stcb); 1450 } 1451 break; 1452 } 1453 #endif 1454 default: 1455 /* TSNH */ 1456 break; 1457 } 1458 } 1459 SCTP_TCB_UNLOCK(stcb); 1460 } 1461 } 1462 null_return: 1463 /* clean up for returning null */ 1464 if (locked_tcb) { 1465 SCTP_TCB_LOCK(locked_tcb); 1466 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1467 } 1468 SCTP_INP_WUNLOCK(inp); 1469 SCTP_INP_INFO_RUNLOCK(); 1470 /* not found */ 1471 return (NULL); 1472 } 1473 1474 /* 1475 * Find an association for a specific endpoint using the association id given 1476 * out in the COMM_UP notification 1477 */ 1478 1479 struct sctp_tcb * 1480 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1481 { 1482 /* 1483 * Use my the assoc_id to find a endpoint 1484 */ 1485 struct sctpasochead *head; 1486 struct sctp_tcb *stcb; 1487 uint32_t id; 1488 1489 if (inp == NULL) { 1490 SCTP_PRINTF("TSNH ep_associd\n"); 1491 return (NULL); 1492 } 1493 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1494 SCTP_PRINTF("TSNH ep_associd0\n"); 1495 return (NULL); 1496 } 1497 id = (uint32_t) asoc_id; 1498 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1499 if (head == NULL) { 1500 /* invalid id TSNH */ 1501 SCTP_PRINTF("TSNH ep_associd1\n"); 1502 return (NULL); 1503 } 1504 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1505 if (stcb->asoc.assoc_id == id) { 1506 if (inp != stcb->sctp_ep) { 1507 /* 1508 * some other guy has the same id active (id 1509 * collision ??). 1510 */ 1511 SCTP_PRINTF("TSNH ep_associd2\n"); 1512 continue; 1513 } 1514 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1515 continue; 1516 } 1517 if (want_lock) { 1518 SCTP_TCB_LOCK(stcb); 1519 } 1520 return (stcb); 1521 } 1522 } 1523 return (NULL); 1524 } 1525 1526 1527 struct sctp_tcb * 1528 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1529 { 1530 struct sctp_tcb *stcb; 1531 1532 SCTP_INP_RLOCK(inp); 1533 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1534 SCTP_INP_RUNLOCK(inp); 1535 return (stcb); 1536 } 1537 1538 1539 static struct sctp_inpcb * 1540 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1541 uint16_t lport, uint32_t vrf_id) 1542 { 1543 struct sctp_inpcb *inp; 1544 struct sctp_laddr *laddr; 1545 1546 #ifdef INET 1547 struct sockaddr_in *sin; 1548 1549 #endif 1550 #ifdef INET6 1551 struct sockaddr_in6 *sin6; 1552 struct sockaddr_in6 *intf_addr6; 1553 1554 #endif 1555 1556 int fnd; 1557 1558 /* 1559 * Endpoint probe expects that the INP_INFO is locked. 1560 */ 1561 #ifdef INET 1562 sin = NULL; 1563 #endif 1564 #ifdef INET6 1565 sin6 = NULL; 1566 #endif 1567 switch (nam->sa_family) { 1568 #ifdef INET 1569 case AF_INET: 1570 sin = (struct sockaddr_in *)nam; 1571 break; 1572 #endif 1573 #ifdef INET6 1574 case AF_INET6: 1575 sin6 = (struct sockaddr_in6 *)nam; 1576 break; 1577 #endif 1578 default: 1579 /* unsupported family */ 1580 return (NULL); 1581 } 1582 1583 if (head == NULL) 1584 return (NULL); 1585 1586 LIST_FOREACH(inp, head, sctp_hash) { 1587 SCTP_INP_RLOCK(inp); 1588 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1589 SCTP_INP_RUNLOCK(inp); 1590 continue; 1591 } 1592 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1593 (inp->sctp_lport == lport)) { 1594 /* got it */ 1595 #ifdef INET 1596 if ((nam->sa_family == AF_INET) && 1597 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1598 SCTP_IPV6_V6ONLY(inp)) { 1599 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1600 SCTP_INP_RUNLOCK(inp); 1601 continue; 1602 } 1603 #endif 1604 #ifdef INET6 1605 /* A V6 address and the endpoint is NOT bound V6 */ 1606 if (nam->sa_family == AF_INET6 && 1607 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1608 SCTP_INP_RUNLOCK(inp); 1609 continue; 1610 } 1611 #endif 1612 /* does a VRF id match? */ 1613 fnd = 0; 1614 if (inp->def_vrf_id == vrf_id) 1615 fnd = 1; 1616 1617 SCTP_INP_RUNLOCK(inp); 1618 if (!fnd) 1619 continue; 1620 return (inp); 1621 } 1622 SCTP_INP_RUNLOCK(inp); 1623 } 1624 switch (nam->sa_family) { 1625 #ifdef INET 1626 case AF_INET: 1627 if (sin->sin_addr.s_addr == INADDR_ANY) { 1628 /* Can't hunt for one that has no address specified */ 1629 return (NULL); 1630 } 1631 break; 1632 #endif 1633 #ifdef INET6 1634 case AF_INET6: 1635 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1636 /* Can't hunt for one that has no address specified */ 1637 return (NULL); 1638 } 1639 break; 1640 #endif 1641 default: 1642 break; 1643 } 1644 /* 1645 * ok, not bound to all so see if we can find a EP bound to this 1646 * address. 1647 */ 1648 LIST_FOREACH(inp, head, sctp_hash) { 1649 SCTP_INP_RLOCK(inp); 1650 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1651 SCTP_INP_RUNLOCK(inp); 1652 continue; 1653 } 1654 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1655 SCTP_INP_RUNLOCK(inp); 1656 continue; 1657 } 1658 /* 1659 * Ok this could be a likely candidate, look at all of its 1660 * addresses 1661 */ 1662 if (inp->sctp_lport != lport) { 1663 SCTP_INP_RUNLOCK(inp); 1664 continue; 1665 } 1666 /* does a VRF id match? */ 1667 fnd = 0; 1668 if (inp->def_vrf_id == vrf_id) 1669 fnd = 1; 1670 1671 if (!fnd) { 1672 SCTP_INP_RUNLOCK(inp); 1673 continue; 1674 } 1675 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1676 if (laddr->ifa == NULL) { 1677 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1678 __FUNCTION__); 1679 continue; 1680 } 1681 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1682 (void *)laddr->ifa); 1683 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1684 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1685 continue; 1686 } 1687 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1688 /* possible, see if it matches */ 1689 switch (nam->sa_family) { 1690 #ifdef INET 1691 case AF_INET: 1692 if (sin->sin_addr.s_addr == 1693 laddr->ifa->address.sin.sin_addr.s_addr) { 1694 SCTP_INP_RUNLOCK(inp); 1695 return (inp); 1696 } 1697 break; 1698 #endif 1699 #ifdef INET6 1700 case AF_INET6: 1701 intf_addr6 = &laddr->ifa->address.sin6; 1702 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1703 intf_addr6)) { 1704 SCTP_INP_RUNLOCK(inp); 1705 return (inp); 1706 } 1707 break; 1708 #endif 1709 } 1710 } 1711 } 1712 SCTP_INP_RUNLOCK(inp); 1713 } 1714 return (NULL); 1715 } 1716 1717 1718 static struct sctp_inpcb * 1719 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1720 { 1721 struct sctppcbhead *head; 1722 struct sctp_inpcb *t_inp; 1723 int fnd; 1724 1725 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1726 SCTP_BASE_INFO(hashmark))]; 1727 LIST_FOREACH(t_inp, head, sctp_hash) { 1728 if (t_inp->sctp_lport != lport) { 1729 continue; 1730 } 1731 /* is it in the VRF in question */ 1732 fnd = 0; 1733 if (t_inp->def_vrf_id == vrf_id) 1734 fnd = 1; 1735 if (!fnd) 1736 continue; 1737 1738 /* This one is in use. */ 1739 /* check the v6/v4 binding issue */ 1740 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1741 SCTP_IPV6_V6ONLY(t_inp)) { 1742 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1743 /* collision in V6 space */ 1744 return (t_inp); 1745 } else { 1746 /* inp is BOUND_V4 no conflict */ 1747 continue; 1748 } 1749 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1750 /* t_inp is bound v4 and v6, conflict always */ 1751 return (t_inp); 1752 } else { 1753 /* t_inp is bound only V4 */ 1754 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1755 SCTP_IPV6_V6ONLY(inp)) { 1756 /* no conflict */ 1757 continue; 1758 } 1759 /* else fall through to conflict */ 1760 } 1761 return (t_inp); 1762 } 1763 return (NULL); 1764 } 1765 1766 1767 int 1768 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1769 { 1770 /* For 1-2-1 with port reuse */ 1771 struct sctppcbhead *head; 1772 struct sctp_inpcb *tinp; 1773 1774 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1775 /* only works with port reuse on */ 1776 return (-1); 1777 } 1778 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1779 return (0); 1780 } 1781 SCTP_INP_RUNLOCK(inp); 1782 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1783 SCTP_BASE_INFO(hashmark))]; 1784 /* Kick out all non-listeners to the TCP hash */ 1785 LIST_FOREACH(tinp, head, sctp_hash) { 1786 if (tinp->sctp_lport != inp->sctp_lport) { 1787 continue; 1788 } 1789 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1790 continue; 1791 } 1792 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1793 continue; 1794 } 1795 if (tinp->sctp_socket->so_qlimit) { 1796 continue; 1797 } 1798 SCTP_INP_WLOCK(tinp); 1799 LIST_REMOVE(tinp, sctp_hash); 1800 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1801 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1802 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1803 SCTP_INP_WUNLOCK(tinp); 1804 } 1805 SCTP_INP_WLOCK(inp); 1806 /* Pull from where he was */ 1807 LIST_REMOVE(inp, sctp_hash); 1808 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1809 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1810 LIST_INSERT_HEAD(head, inp, sctp_hash); 1811 SCTP_INP_WUNLOCK(inp); 1812 SCTP_INP_RLOCK(inp); 1813 return (0); 1814 } 1815 1816 1817 struct sctp_inpcb * 1818 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1819 uint32_t vrf_id) 1820 { 1821 /* 1822 * First we check the hash table to see if someone has this port 1823 * bound with just the port. 1824 */ 1825 struct sctp_inpcb *inp; 1826 struct sctppcbhead *head; 1827 int lport; 1828 unsigned int i; 1829 1830 #ifdef INET 1831 struct sockaddr_in *sin; 1832 1833 #endif 1834 #ifdef INET6 1835 struct sockaddr_in6 *sin6; 1836 1837 #endif 1838 1839 switch (nam->sa_family) { 1840 #ifdef INET 1841 case AF_INET: 1842 sin = (struct sockaddr_in *)nam; 1843 lport = sin->sin_port; 1844 break; 1845 #endif 1846 #ifdef INET6 1847 case AF_INET6: 1848 sin6 = (struct sockaddr_in6 *)nam; 1849 lport = sin6->sin6_port; 1850 break; 1851 #endif 1852 default: 1853 return (NULL); 1854 } 1855 /* 1856 * I could cheat here and just cast to one of the types but we will 1857 * do it right. It also provides the check against an Unsupported 1858 * type too. 1859 */ 1860 /* Find the head of the ALLADDR chain */ 1861 if (have_lock == 0) { 1862 SCTP_INP_INFO_RLOCK(); 1863 } 1864 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1865 SCTP_BASE_INFO(hashmark))]; 1866 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1867 1868 /* 1869 * If the TCP model exists it could be that the main listening 1870 * endpoint is gone but there still exists a connected socket for 1871 * this guy. If so we can return the first one that we find. This 1872 * may NOT be the correct one so the caller should be wary on the 1873 * returned INP. Currently the only caller that sets find_tcp_pool 1874 * is in bindx where we are verifying that a user CAN bind the 1875 * address. He either has bound it already, or someone else has, or 1876 * its open to bind, so this is good enough. 1877 */ 1878 if (inp == NULL && find_tcp_pool) { 1879 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1880 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1881 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1882 if (inp) { 1883 break; 1884 } 1885 } 1886 } 1887 if (inp) { 1888 SCTP_INP_INCR_REF(inp); 1889 } 1890 if (have_lock == 0) { 1891 SCTP_INP_INFO_RUNLOCK(); 1892 } 1893 return (inp); 1894 } 1895 1896 /* 1897 * Find an association for an endpoint with the pointer to whom you want to 1898 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1899 * need to change the *to to some other struct like a mbuf... 1900 */ 1901 struct sctp_tcb * 1902 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1903 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1904 uint32_t vrf_id) 1905 { 1906 struct sctp_inpcb *inp = NULL; 1907 struct sctp_tcb *retval; 1908 1909 SCTP_INP_INFO_RLOCK(); 1910 if (find_tcp_pool) { 1911 if (inp_p != NULL) { 1912 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1913 vrf_id); 1914 } else { 1915 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1916 vrf_id); 1917 } 1918 if (retval != NULL) { 1919 SCTP_INP_INFO_RUNLOCK(); 1920 return (retval); 1921 } 1922 } 1923 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1924 if (inp_p != NULL) { 1925 *inp_p = inp; 1926 } 1927 SCTP_INP_INFO_RUNLOCK(); 1928 1929 if (inp == NULL) { 1930 return (NULL); 1931 } 1932 /* 1933 * ok, we have an endpoint, now lets find the assoc for it (if any) 1934 * we now place the source address or from in the to of the find 1935 * endpoint call. Since in reality this chain is used from the 1936 * inbound packet side. 1937 */ 1938 if (inp_p != NULL) { 1939 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1940 NULL); 1941 } else { 1942 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1943 NULL); 1944 } 1945 return retval; 1946 } 1947 1948 1949 /* 1950 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1951 * find all addresses that the sender has specified in any address list. Each 1952 * address will be used to lookup the TCB and see if one exits. 1953 */ 1954 static struct sctp_tcb * 1955 sctp_findassociation_special_addr(struct mbuf *m, int offset, 1956 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1957 struct sockaddr *dst) 1958 { 1959 struct sctp_paramhdr *phdr, parm_buf; 1960 struct sctp_tcb *retval; 1961 uint32_t ptype, plen; 1962 1963 #ifdef INET 1964 struct sockaddr_in sin4; 1965 1966 #endif 1967 #ifdef INET6 1968 struct sockaddr_in6 sin6; 1969 1970 #endif 1971 1972 #ifdef INET 1973 memset(&sin4, 0, sizeof(sin4)); 1974 sin4.sin_len = sizeof(sin4); 1975 sin4.sin_family = AF_INET; 1976 sin4.sin_port = sh->src_port; 1977 #endif 1978 #ifdef INET6 1979 memset(&sin6, 0, sizeof(sin6)); 1980 sin6.sin6_len = sizeof(sin6); 1981 sin6.sin6_family = AF_INET6; 1982 sin6.sin6_port = sh->src_port; 1983 #endif 1984 1985 retval = NULL; 1986 offset += sizeof(struct sctp_init_chunk); 1987 1988 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1989 while (phdr != NULL) { 1990 /* now we must see if we want the parameter */ 1991 ptype = ntohs(phdr->param_type); 1992 plen = ntohs(phdr->param_length); 1993 if (plen == 0) { 1994 break; 1995 } 1996 #ifdef INET 1997 if (ptype == SCTP_IPV4_ADDRESS && 1998 plen == sizeof(struct sctp_ipv4addr_param)) { 1999 /* Get the rest of the address */ 2000 struct sctp_ipv4addr_param ip4_parm, *p4; 2001 2002 phdr = sctp_get_next_param(m, offset, 2003 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2004 if (phdr == NULL) { 2005 return (NULL); 2006 } 2007 p4 = (struct sctp_ipv4addr_param *)phdr; 2008 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2009 /* look it up */ 2010 retval = sctp_findassociation_ep_addr(inp_p, 2011 (struct sockaddr *)&sin4, netp, dst, NULL); 2012 if (retval != NULL) { 2013 return (retval); 2014 } 2015 } 2016 #endif 2017 #ifdef INET6 2018 if (ptype == SCTP_IPV6_ADDRESS && 2019 plen == sizeof(struct sctp_ipv6addr_param)) { 2020 /* Get the rest of the address */ 2021 struct sctp_ipv6addr_param ip6_parm, *p6; 2022 2023 phdr = sctp_get_next_param(m, offset, 2024 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2025 if (phdr == NULL) { 2026 return (NULL); 2027 } 2028 p6 = (struct sctp_ipv6addr_param *)phdr; 2029 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2030 /* look it up */ 2031 retval = sctp_findassociation_ep_addr(inp_p, 2032 (struct sockaddr *)&sin6, netp, dst, NULL); 2033 if (retval != NULL) { 2034 return (retval); 2035 } 2036 } 2037 #endif 2038 offset += SCTP_SIZE32(plen); 2039 phdr = sctp_get_next_param(m, offset, &parm_buf, 2040 sizeof(parm_buf)); 2041 } 2042 return (NULL); 2043 } 2044 2045 static struct sctp_tcb * 2046 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2047 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2048 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2049 { 2050 /* 2051 * Use my vtag to hash. If we find it we then verify the source addr 2052 * is in the assoc. If all goes well we save a bit on rec of a 2053 * packet. 2054 */ 2055 struct sctpasochead *head; 2056 struct sctp_nets *net; 2057 struct sctp_tcb *stcb; 2058 2059 SCTP_INP_INFO_RLOCK(); 2060 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2061 SCTP_BASE_INFO(hashasocmark))]; 2062 if (head == NULL) { 2063 /* invalid vtag */ 2064 SCTP_INP_INFO_RUNLOCK(); 2065 return (NULL); 2066 } 2067 LIST_FOREACH(stcb, head, sctp_asocs) { 2068 SCTP_INP_RLOCK(stcb->sctp_ep); 2069 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2070 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2071 continue; 2072 } 2073 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2074 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2075 continue; 2076 } 2077 SCTP_TCB_LOCK(stcb); 2078 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2079 if (stcb->asoc.my_vtag == vtag) { 2080 /* candidate */ 2081 if (stcb->rport != rport) { 2082 SCTP_TCB_UNLOCK(stcb); 2083 continue; 2084 } 2085 if (stcb->sctp_ep->sctp_lport != lport) { 2086 SCTP_TCB_UNLOCK(stcb); 2087 continue; 2088 } 2089 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2090 SCTP_TCB_UNLOCK(stcb); 2091 continue; 2092 } 2093 /* RRS:Need toaddr check here */ 2094 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2095 /* Endpoint does not own this address */ 2096 SCTP_TCB_UNLOCK(stcb); 2097 continue; 2098 } 2099 if (remote_tag) { 2100 /* 2101 * If we have both vtags that's all we match 2102 * on 2103 */ 2104 if (stcb->asoc.peer_vtag == remote_tag) { 2105 /* 2106 * If both tags match we consider it 2107 * conclusive and check NO 2108 * source/destination addresses 2109 */ 2110 goto conclusive; 2111 } 2112 } 2113 if (skip_src_check) { 2114 conclusive: 2115 if (from) { 2116 *netp = sctp_findnet(stcb, from); 2117 } else { 2118 *netp = NULL; /* unknown */ 2119 } 2120 if (inp_p) 2121 *inp_p = stcb->sctp_ep; 2122 SCTP_INP_INFO_RUNLOCK(); 2123 return (stcb); 2124 } 2125 net = sctp_findnet(stcb, from); 2126 if (net) { 2127 /* yep its him. */ 2128 *netp = net; 2129 SCTP_STAT_INCR(sctps_vtagexpress); 2130 *inp_p = stcb->sctp_ep; 2131 SCTP_INP_INFO_RUNLOCK(); 2132 return (stcb); 2133 } else { 2134 /* 2135 * not him, this should only happen in rare 2136 * cases so I peg it. 2137 */ 2138 SCTP_STAT_INCR(sctps_vtagbogus); 2139 } 2140 } 2141 SCTP_TCB_UNLOCK(stcb); 2142 } 2143 SCTP_INP_INFO_RUNLOCK(); 2144 return (NULL); 2145 } 2146 2147 /* 2148 * Find an association with the pointer to the inbound IP packet. This can be 2149 * a IPv4 or IPv6 packet. 2150 */ 2151 struct sctp_tcb * 2152 sctp_findassociation_addr(struct mbuf *m, int offset, 2153 struct sockaddr *src, struct sockaddr *dst, 2154 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2155 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2156 { 2157 int find_tcp_pool; 2158 struct sctp_tcb *retval; 2159 struct sctp_inpcb *inp; 2160 2161 if (sh->v_tag) { 2162 /* we only go down this path if vtag is non-zero */ 2163 retval = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2164 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2165 if (retval) { 2166 return (retval); 2167 } 2168 } 2169 find_tcp_pool = 0; 2170 if ((ch->chunk_type != SCTP_INITIATION) && 2171 (ch->chunk_type != SCTP_INITIATION_ACK) && 2172 (ch->chunk_type != SCTP_COOKIE_ACK) && 2173 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2174 /* Other chunk types go to the tcp pool. */ 2175 find_tcp_pool = 1; 2176 } 2177 if (inp_p) { 2178 retval = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2179 find_tcp_pool, vrf_id); 2180 inp = *inp_p; 2181 } else { 2182 retval = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2183 find_tcp_pool, vrf_id); 2184 } 2185 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", (void *)retval, (void *)inp); 2186 if (retval == NULL && inp) { 2187 /* Found a EP but not this address */ 2188 if ((ch->chunk_type == SCTP_INITIATION) || 2189 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2190 /*- 2191 * special hook, we do NOT return linp or an 2192 * association that is linked to an existing 2193 * association that is under the TCP pool (i.e. no 2194 * listener exists). The endpoint finding routine 2195 * will always find a listener before examining the 2196 * TCP pool. 2197 */ 2198 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2199 if (inp_p) { 2200 *inp_p = NULL; 2201 } 2202 return (NULL); 2203 } 2204 retval = sctp_findassociation_special_addr(m, 2205 offset, sh, &inp, netp, dst); 2206 if (inp_p != NULL) { 2207 *inp_p = inp; 2208 } 2209 } 2210 } 2211 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", (void *)retval); 2212 return (retval); 2213 } 2214 2215 /* 2216 * lookup an association by an ASCONF lookup address. 2217 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2218 */ 2219 struct sctp_tcb * 2220 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2221 struct sockaddr *dst, struct sctphdr *sh, 2222 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2223 { 2224 struct sctp_tcb *stcb; 2225 struct sockaddr_storage remote_store; 2226 struct sctp_paramhdr parm_buf, *phdr; 2227 int ptype; 2228 int zero_address = 0; 2229 2230 #ifdef INET 2231 struct sockaddr_in *sin; 2232 2233 #endif 2234 #ifdef INET6 2235 struct sockaddr_in6 *sin6; 2236 2237 #endif 2238 2239 memset(&remote_store, 0, sizeof(remote_store)); 2240 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2241 &parm_buf, sizeof(struct sctp_paramhdr)); 2242 if (phdr == NULL) { 2243 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2244 __FUNCTION__); 2245 return NULL; 2246 } 2247 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2248 /* get the correlation address */ 2249 switch (ptype) { 2250 #ifdef INET6 2251 case SCTP_IPV6_ADDRESS: 2252 { 2253 /* ipv6 address param */ 2254 struct sctp_ipv6addr_param *p6, p6_buf; 2255 2256 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2257 return NULL; 2258 } 2259 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2260 offset + sizeof(struct sctp_asconf_chunk), 2261 &p6_buf.ph, sizeof(*p6)); 2262 if (p6 == NULL) { 2263 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2264 __FUNCTION__); 2265 return (NULL); 2266 } 2267 sin6 = (struct sockaddr_in6 *)&remote_store; 2268 sin6->sin6_family = AF_INET6; 2269 sin6->sin6_len = sizeof(*sin6); 2270 sin6->sin6_port = sh->src_port; 2271 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2272 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2273 zero_address = 1; 2274 break; 2275 } 2276 #endif 2277 #ifdef INET 2278 case SCTP_IPV4_ADDRESS: 2279 { 2280 /* ipv4 address param */ 2281 struct sctp_ipv4addr_param *p4, p4_buf; 2282 2283 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2284 return NULL; 2285 } 2286 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2287 offset + sizeof(struct sctp_asconf_chunk), 2288 &p4_buf.ph, sizeof(*p4)); 2289 if (p4 == NULL) { 2290 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2291 __FUNCTION__); 2292 return (NULL); 2293 } 2294 sin = (struct sockaddr_in *)&remote_store; 2295 sin->sin_family = AF_INET; 2296 sin->sin_len = sizeof(*sin); 2297 sin->sin_port = sh->src_port; 2298 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2299 if (sin->sin_addr.s_addr == INADDR_ANY) 2300 zero_address = 1; 2301 break; 2302 } 2303 #endif 2304 default: 2305 /* invalid address param type */ 2306 return NULL; 2307 } 2308 2309 if (zero_address) { 2310 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2311 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2312 if (stcb != NULL) { 2313 SCTP_INP_DECR_REF(*inp_p); 2314 } 2315 } else { 2316 stcb = sctp_findassociation_ep_addr(inp_p, 2317 (struct sockaddr *)&remote_store, netp, 2318 dst, NULL); 2319 } 2320 return (stcb); 2321 } 2322 2323 2324 /* 2325 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2326 * addresses. This way if we don't get a bind we by default pick a ephemeral 2327 * port with all addresses bound. 2328 */ 2329 int 2330 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2331 { 2332 /* 2333 * we get called when a new endpoint starts up. We need to allocate 2334 * the sctp_inpcb structure from the zone and init it. Mark it as 2335 * unbound and find a port that we can use as an ephemeral with 2336 * INADDR_ANY. If the user binds later no problem we can then add in 2337 * the specific addresses. And setup the default parameters for the 2338 * EP. 2339 */ 2340 int i, error; 2341 struct sctp_inpcb *inp; 2342 struct sctp_pcb *m; 2343 struct timeval time; 2344 sctp_sharedkey_t *null_key; 2345 2346 error = 0; 2347 2348 SCTP_INP_INFO_WLOCK(); 2349 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2350 if (inp == NULL) { 2351 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2352 SCTP_INP_INFO_WUNLOCK(); 2353 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2354 return (ENOBUFS); 2355 } 2356 /* zap it */ 2357 bzero(inp, sizeof(*inp)); 2358 2359 /* bump generations */ 2360 /* setup socket pointers */ 2361 inp->sctp_socket = so; 2362 inp->ip_inp.inp.inp_socket = so; 2363 #ifdef INET6 2364 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2365 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2366 } 2367 #endif 2368 inp->sctp_associd_counter = 1; 2369 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2370 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2371 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2372 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2373 /* init the small hash table we use to track asocid <-> tcb */ 2374 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2375 if (inp->sctp_asocidhash == NULL) { 2376 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2377 SCTP_INP_INFO_WUNLOCK(); 2378 return (ENOBUFS); 2379 } 2380 #ifdef IPSEC 2381 { 2382 struct inpcbpolicy *pcb_sp = NULL; 2383 2384 error = ipsec_init_policy(so, &pcb_sp); 2385 /* Arrange to share the policy */ 2386 inp->ip_inp.inp.inp_sp = pcb_sp; 2387 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2388 } 2389 if (error != 0) { 2390 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2391 SCTP_INP_INFO_WUNLOCK(); 2392 return error; 2393 } 2394 #endif /* IPSEC */ 2395 SCTP_INCR_EP_COUNT(); 2396 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2397 SCTP_INP_INFO_WUNLOCK(); 2398 2399 so->so_pcb = (caddr_t)inp; 2400 2401 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2402 /* UDP style socket */ 2403 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2404 SCTP_PCB_FLAGS_UNBOUND); 2405 /* Be sure it is NON-BLOCKING IO for UDP */ 2406 /* SCTP_SET_SO_NBIO(so); */ 2407 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2408 /* TCP style socket */ 2409 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2410 SCTP_PCB_FLAGS_UNBOUND); 2411 /* Be sure we have blocking IO by default */ 2412 SCTP_CLEAR_SO_NBIO(so); 2413 } else { 2414 /* 2415 * unsupported socket type (RAW, etc)- in case we missed it 2416 * in protosw 2417 */ 2418 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2419 so->so_pcb = NULL; 2420 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2421 return (EOPNOTSUPP); 2422 } 2423 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2424 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2425 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2426 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2427 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2428 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2429 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2430 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2431 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2432 } 2433 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2434 &inp->sctp_hashmark); 2435 if (inp->sctp_tcbhash == NULL) { 2436 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2437 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2438 so->so_pcb = NULL; 2439 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2440 return (ENOBUFS); 2441 } 2442 inp->def_vrf_id = vrf_id; 2443 2444 SCTP_INP_INFO_WLOCK(); 2445 SCTP_INP_LOCK_INIT(inp); 2446 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2447 SCTP_INP_READ_INIT(inp); 2448 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2449 /* lock the new ep */ 2450 SCTP_INP_WLOCK(inp); 2451 2452 /* add it to the info area */ 2453 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2454 SCTP_INP_INFO_WUNLOCK(); 2455 2456 TAILQ_INIT(&inp->read_queue); 2457 LIST_INIT(&inp->sctp_addr_list); 2458 2459 LIST_INIT(&inp->sctp_asoc_list); 2460 2461 #ifdef SCTP_TRACK_FREED_ASOCS 2462 /* TEMP CODE */ 2463 LIST_INIT(&inp->sctp_asoc_free_list); 2464 #endif 2465 /* Init the timer structure for signature change */ 2466 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2467 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2468 2469 /* now init the actual endpoint default data */ 2470 m = &inp->sctp_ep; 2471 2472 /* setup the base timeout information */ 2473 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2474 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2475 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2476 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2477 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2478 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2479 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2480 /* all max/min max are in ms */ 2481 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2482 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2483 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2484 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2485 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2486 2487 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2488 2489 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2490 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2491 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2492 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2493 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2494 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2495 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2496 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2497 2498 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2499 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2500 /* number of streams to pre-open on a association */ 2501 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2502 2503 /* Add adaptation cookie */ 2504 m->adaptation_layer_indicator = 0x504C5253; 2505 2506 /* seed random number generator */ 2507 m->random_counter = 1; 2508 m->store_at = SCTP_SIGNATURE_SIZE; 2509 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2510 sctp_fill_random_store(m); 2511 2512 /* Minimum cookie size */ 2513 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2514 sizeof(struct sctp_state_cookie); 2515 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2516 2517 /* Setup the initial secret */ 2518 (void)SCTP_GETTIME_TIMEVAL(&time); 2519 m->time_of_secret_change = time.tv_sec; 2520 2521 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2522 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2523 } 2524 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2525 2526 /* How long is a cookie good for ? */ 2527 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2528 /* 2529 * Initialize authentication parameters 2530 */ 2531 m->local_hmacs = sctp_default_supported_hmaclist(); 2532 m->local_auth_chunks = sctp_alloc_chunklist(); 2533 m->default_dscp = 0; 2534 #ifdef INET6 2535 m->default_flowlabel = 0; 2536 #endif 2537 m->port = 0; /* encapsulation disabled by default */ 2538 sctp_auth_set_default_chunks(m->local_auth_chunks); 2539 LIST_INIT(&m->shared_keys); 2540 /* add default NULL key as key id 0 */ 2541 null_key = sctp_alloc_sharedkey(); 2542 sctp_insert_sharedkey(&m->shared_keys, null_key); 2543 SCTP_INP_WUNLOCK(inp); 2544 #ifdef SCTP_LOG_CLOSING 2545 sctp_log_closing(inp, NULL, 12); 2546 #endif 2547 return (error); 2548 } 2549 2550 2551 void 2552 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2553 struct sctp_tcb *stcb) 2554 { 2555 struct sctp_nets *net; 2556 uint16_t lport, rport; 2557 struct sctppcbhead *head; 2558 struct sctp_laddr *laddr, *oladdr; 2559 2560 atomic_add_int(&stcb->asoc.refcnt, 1); 2561 SCTP_TCB_UNLOCK(stcb); 2562 SCTP_INP_INFO_WLOCK(); 2563 SCTP_INP_WLOCK(old_inp); 2564 SCTP_INP_WLOCK(new_inp); 2565 SCTP_TCB_LOCK(stcb); 2566 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2567 2568 new_inp->sctp_ep.time_of_secret_change = 2569 old_inp->sctp_ep.time_of_secret_change; 2570 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2571 sizeof(old_inp->sctp_ep.secret_key)); 2572 new_inp->sctp_ep.current_secret_number = 2573 old_inp->sctp_ep.current_secret_number; 2574 new_inp->sctp_ep.last_secret_number = 2575 old_inp->sctp_ep.last_secret_number; 2576 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2577 2578 /* make it so new data pours into the new socket */ 2579 stcb->sctp_socket = new_inp->sctp_socket; 2580 stcb->sctp_ep = new_inp; 2581 2582 /* Copy the port across */ 2583 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2584 rport = stcb->rport; 2585 /* Pull the tcb from the old association */ 2586 LIST_REMOVE(stcb, sctp_tcbhash); 2587 LIST_REMOVE(stcb, sctp_tcblist); 2588 if (stcb->asoc.in_asocid_hash) { 2589 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2590 } 2591 /* Now insert the new_inp into the TCP connected hash */ 2592 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2593 2594 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2595 /* Its safe to access */ 2596 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2597 2598 /* Now move the tcb into the endpoint list */ 2599 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2600 /* 2601 * Question, do we even need to worry about the ep-hash since we 2602 * only have one connection? Probably not :> so lets get rid of it 2603 * and not suck up any kernel memory in that. 2604 */ 2605 if (stcb->asoc.in_asocid_hash) { 2606 struct sctpasochead *lhd; 2607 2608 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2609 new_inp->hashasocidmark)]; 2610 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2611 } 2612 /* Ok. Let's restart timer. */ 2613 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2614 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2615 stcb, net); 2616 } 2617 2618 SCTP_INP_INFO_WUNLOCK(); 2619 if (new_inp->sctp_tcbhash != NULL) { 2620 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2621 new_inp->sctp_tcbhash = NULL; 2622 } 2623 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2624 /* Subset bound, so copy in the laddr list from the old_inp */ 2625 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2626 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2627 if (laddr == NULL) { 2628 /* 2629 * Gak, what can we do? This assoc is really 2630 * HOSED. We probably should send an abort 2631 * here. 2632 */ 2633 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2634 continue; 2635 } 2636 SCTP_INCR_LADDR_COUNT(); 2637 bzero(laddr, sizeof(*laddr)); 2638 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2639 laddr->ifa = oladdr->ifa; 2640 atomic_add_int(&laddr->ifa->refcount, 1); 2641 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2642 sctp_nxt_addr); 2643 new_inp->laddr_count++; 2644 if (oladdr == stcb->asoc.last_used_address) { 2645 stcb->asoc.last_used_address = laddr; 2646 } 2647 } 2648 } 2649 /* 2650 * Now any running timers need to be adjusted since we really don't 2651 * care if they are running or not just blast in the new_inp into 2652 * all of them. 2653 */ 2654 2655 stcb->asoc.dack_timer.ep = (void *)new_inp; 2656 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2657 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2658 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2659 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2660 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2661 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2662 /* now what about the nets? */ 2663 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2664 net->pmtu_timer.ep = (void *)new_inp; 2665 net->hb_timer.ep = (void *)new_inp; 2666 net->rxt_timer.ep = (void *)new_inp; 2667 } 2668 SCTP_INP_WUNLOCK(new_inp); 2669 SCTP_INP_WUNLOCK(old_inp); 2670 } 2671 2672 2673 2674 2675 /* sctp_ifap is used to bypass normal local address validation checks */ 2676 int 2677 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2678 struct sctp_ifa *sctp_ifap, struct thread *p) 2679 { 2680 /* bind a ep to a socket address */ 2681 struct sctppcbhead *head; 2682 struct sctp_inpcb *inp, *inp_tmp; 2683 struct inpcb *ip_inp; 2684 int port_reuse_active = 0; 2685 int bindall; 2686 uint16_t lport; 2687 int error; 2688 uint32_t vrf_id; 2689 2690 lport = 0; 2691 error = 0; 2692 bindall = 1; 2693 inp = (struct sctp_inpcb *)so->so_pcb; 2694 ip_inp = (struct inpcb *)so->so_pcb; 2695 #ifdef SCTP_DEBUG 2696 if (addr) { 2697 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2698 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2699 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2700 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2701 } 2702 #endif 2703 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2704 /* already did a bind, subsequent binds NOT allowed ! */ 2705 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2706 return (EINVAL); 2707 } 2708 #ifdef INVARIANTS 2709 if (p == NULL) 2710 panic("null proc/thread"); 2711 #endif 2712 if (addr != NULL) { 2713 switch (addr->sa_family) { 2714 #ifdef INET 2715 case AF_INET: 2716 { 2717 struct sockaddr_in *sin; 2718 2719 /* IPV6_V6ONLY socket? */ 2720 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2721 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2722 return (EINVAL); 2723 } 2724 if (addr->sa_len != sizeof(*sin)) { 2725 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2726 return (EINVAL); 2727 } 2728 sin = (struct sockaddr_in *)addr; 2729 lport = sin->sin_port; 2730 /* 2731 * For LOOPBACK the prison_local_ip4() call 2732 * will transmute the ip address to the 2733 * proper value. 2734 */ 2735 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2736 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2737 return (error); 2738 } 2739 if (sin->sin_addr.s_addr != INADDR_ANY) { 2740 bindall = 0; 2741 } 2742 break; 2743 } 2744 #endif 2745 #ifdef INET6 2746 case AF_INET6: 2747 { 2748 /* 2749 * Only for pure IPv6 Address. (No IPv4 2750 * Mapped!) 2751 */ 2752 struct sockaddr_in6 *sin6; 2753 2754 sin6 = (struct sockaddr_in6 *)addr; 2755 2756 if (addr->sa_len != sizeof(*sin6)) { 2757 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2758 return (EINVAL); 2759 } 2760 lport = sin6->sin6_port; 2761 /* 2762 * For LOOPBACK the prison_local_ip6() call 2763 * will transmute the ipv6 address to the 2764 * proper value. 2765 */ 2766 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2767 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2768 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2769 return (error); 2770 } 2771 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2772 bindall = 0; 2773 /* KAME hack: embed scopeid */ 2774 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2775 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2776 return (EINVAL); 2777 } 2778 } 2779 /* this must be cleared for ifa_ifwithaddr() */ 2780 sin6->sin6_scope_id = 0; 2781 break; 2782 } 2783 #endif 2784 default: 2785 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2786 return (EAFNOSUPPORT); 2787 } 2788 } 2789 SCTP_INP_INFO_WLOCK(); 2790 SCTP_INP_WLOCK(inp); 2791 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2792 vrf_id = inp->def_vrf_id; 2793 2794 /* increase our count due to the unlock we do */ 2795 SCTP_INP_INCR_REF(inp); 2796 if (lport) { 2797 /* 2798 * Did the caller specify a port? if so we must see if an ep 2799 * already has this one bound. 2800 */ 2801 /* got to be root to get at low ports */ 2802 if (ntohs(lport) < IPPORT_RESERVED) { 2803 if (p && (error = 2804 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2805 )) { 2806 SCTP_INP_DECR_REF(inp); 2807 SCTP_INP_WUNLOCK(inp); 2808 SCTP_INP_INFO_WUNLOCK(); 2809 return (error); 2810 } 2811 } 2812 if (p == NULL) { 2813 SCTP_INP_DECR_REF(inp); 2814 SCTP_INP_WUNLOCK(inp); 2815 SCTP_INP_INFO_WUNLOCK(); 2816 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2817 return (error); 2818 } 2819 SCTP_INP_WUNLOCK(inp); 2820 if (bindall) { 2821 vrf_id = inp->def_vrf_id; 2822 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2823 if (inp_tmp != NULL) { 2824 /* 2825 * lock guy returned and lower count note 2826 * that we are not bound so inp_tmp should 2827 * NEVER be inp. And it is this inp 2828 * (inp_tmp) that gets the reference bump, 2829 * so we must lower it. 2830 */ 2831 SCTP_INP_DECR_REF(inp_tmp); 2832 /* unlock info */ 2833 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2834 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2835 /* 2836 * Ok, must be one-2-one and 2837 * allowing port re-use 2838 */ 2839 port_reuse_active = 1; 2840 goto continue_anyway; 2841 } 2842 SCTP_INP_DECR_REF(inp); 2843 SCTP_INP_INFO_WUNLOCK(); 2844 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2845 return (EADDRINUSE); 2846 } 2847 } else { 2848 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2849 if (inp_tmp != NULL) { 2850 /* 2851 * lock guy returned and lower count note 2852 * that we are not bound so inp_tmp should 2853 * NEVER be inp. And it is this inp 2854 * (inp_tmp) that gets the reference bump, 2855 * so we must lower it. 2856 */ 2857 SCTP_INP_DECR_REF(inp_tmp); 2858 /* unlock info */ 2859 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2860 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2861 /* 2862 * Ok, must be one-2-one and 2863 * allowing port re-use 2864 */ 2865 port_reuse_active = 1; 2866 goto continue_anyway; 2867 } 2868 SCTP_INP_DECR_REF(inp); 2869 SCTP_INP_INFO_WUNLOCK(); 2870 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2871 return (EADDRINUSE); 2872 } 2873 } 2874 continue_anyway: 2875 SCTP_INP_WLOCK(inp); 2876 if (bindall) { 2877 /* verify that no lport is not used by a singleton */ 2878 if ((port_reuse_active == 0) && 2879 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2880 /* Sorry someone already has this one bound */ 2881 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2882 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2883 port_reuse_active = 1; 2884 } else { 2885 SCTP_INP_DECR_REF(inp); 2886 SCTP_INP_WUNLOCK(inp); 2887 SCTP_INP_INFO_WUNLOCK(); 2888 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2889 return (EADDRINUSE); 2890 } 2891 } 2892 } 2893 } else { 2894 uint16_t first, last, candidate; 2895 uint16_t count; 2896 int done; 2897 2898 if (ip_inp->inp_flags & INP_HIGHPORT) { 2899 first = MODULE_GLOBAL(ipport_hifirstauto); 2900 last = MODULE_GLOBAL(ipport_hilastauto); 2901 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2902 if (p && (error = 2903 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2904 )) { 2905 SCTP_INP_DECR_REF(inp); 2906 SCTP_INP_WUNLOCK(inp); 2907 SCTP_INP_INFO_WUNLOCK(); 2908 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2909 return (error); 2910 } 2911 first = MODULE_GLOBAL(ipport_lowfirstauto); 2912 last = MODULE_GLOBAL(ipport_lowlastauto); 2913 } else { 2914 first = MODULE_GLOBAL(ipport_firstauto); 2915 last = MODULE_GLOBAL(ipport_lastauto); 2916 } 2917 if (first > last) { 2918 uint16_t temp; 2919 2920 temp = first; 2921 first = last; 2922 last = temp; 2923 } 2924 count = last - first + 1; /* number of candidates */ 2925 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2926 2927 done = 0; 2928 while (!done) { 2929 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2930 done = 1; 2931 } 2932 if (!done) { 2933 if (--count == 0) { 2934 SCTP_INP_DECR_REF(inp); 2935 SCTP_INP_WUNLOCK(inp); 2936 SCTP_INP_INFO_WUNLOCK(); 2937 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2938 return (EADDRINUSE); 2939 } 2940 if (candidate == last) 2941 candidate = first; 2942 else 2943 candidate = candidate + 1; 2944 } 2945 } 2946 lport = htons(candidate); 2947 } 2948 SCTP_INP_DECR_REF(inp); 2949 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2950 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2951 /* 2952 * this really should not happen. The guy did a non-blocking 2953 * bind and then did a close at the same time. 2954 */ 2955 SCTP_INP_WUNLOCK(inp); 2956 SCTP_INP_INFO_WUNLOCK(); 2957 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2958 return (EINVAL); 2959 } 2960 /* ok we look clear to give out this port, so lets setup the binding */ 2961 if (bindall) { 2962 /* binding to all addresses, so just set in the proper flags */ 2963 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2964 /* set the automatic addr changes from kernel flag */ 2965 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2966 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2967 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2968 } else { 2969 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2970 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2971 } 2972 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2973 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2974 } else { 2975 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2976 } 2977 /* 2978 * set the automatic mobility_base from kernel flag (by 2979 * micchie) 2980 */ 2981 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 2982 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 2983 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2984 } else { 2985 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 2986 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2987 } 2988 /* 2989 * set the automatic mobility_fasthandoff from kernel flag 2990 * (by micchie) 2991 */ 2992 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 2993 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 2994 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2995 } else { 2996 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 2997 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2998 } 2999 } else { 3000 /* 3001 * bind specific, make sure flags is off and add a new 3002 * address structure to the sctp_addr_list inside the ep 3003 * structure. 3004 * 3005 * We will need to allocate one and insert it at the head. The 3006 * socketopt call can just insert new addresses in there as 3007 * well. It will also have to do the embed scope kame hack 3008 * too (before adding). 3009 */ 3010 struct sctp_ifa *ifa; 3011 struct sockaddr_storage store_sa; 3012 3013 memset(&store_sa, 0, sizeof(store_sa)); 3014 switch (addr->sa_family) { 3015 #ifdef INET 3016 case AF_INET: 3017 { 3018 struct sockaddr_in *sin; 3019 3020 sin = (struct sockaddr_in *)&store_sa; 3021 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3022 sin->sin_port = 0; 3023 break; 3024 } 3025 #endif 3026 #ifdef INET6 3027 case AF_INET6: 3028 { 3029 struct sockaddr_in6 *sin6; 3030 3031 sin6 = (struct sockaddr_in6 *)&store_sa; 3032 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3033 sin6->sin6_port = 0; 3034 break; 3035 } 3036 #endif 3037 default: 3038 break; 3039 } 3040 /* 3041 * first find the interface with the bound address need to 3042 * zero out the port to find the address! yuck! can't do 3043 * this earlier since need port for sctp_pcb_findep() 3044 */ 3045 if (sctp_ifap != NULL) { 3046 ifa = sctp_ifap; 3047 } else { 3048 /* 3049 * Note for BSD we hit here always other O/S's will 3050 * pass things in via the sctp_ifap argument 3051 * (Panda). 3052 */ 3053 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3054 vrf_id, SCTP_ADDR_NOT_LOCKED); 3055 } 3056 if (ifa == NULL) { 3057 /* Can't find an interface with that address */ 3058 SCTP_INP_WUNLOCK(inp); 3059 SCTP_INP_INFO_WUNLOCK(); 3060 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3061 return (EADDRNOTAVAIL); 3062 } 3063 #ifdef INET6 3064 if (addr->sa_family == AF_INET6) { 3065 /* GAK, more FIXME IFA lock? */ 3066 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3067 /* Can't bind a non-existent addr. */ 3068 SCTP_INP_WUNLOCK(inp); 3069 SCTP_INP_INFO_WUNLOCK(); 3070 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3071 return (EINVAL); 3072 } 3073 } 3074 #endif 3075 /* we're not bound all */ 3076 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3077 /* allow bindx() to send ASCONF's for binding changes */ 3078 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3079 /* clear automatic addr changes from kernel flag */ 3080 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3081 3082 /* add this address to the endpoint list */ 3083 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3084 if (error != 0) { 3085 SCTP_INP_WUNLOCK(inp); 3086 SCTP_INP_INFO_WUNLOCK(); 3087 return (error); 3088 } 3089 inp->laddr_count++; 3090 } 3091 /* find the bucket */ 3092 if (port_reuse_active) { 3093 /* Put it into tcp 1-2-1 hash */ 3094 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3095 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3096 } else { 3097 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3098 } 3099 /* put it in the bucket */ 3100 LIST_INSERT_HEAD(head, inp, sctp_hash); 3101 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3102 (void *)head, ntohs(lport), port_reuse_active); 3103 /* set in the port */ 3104 inp->sctp_lport = lport; 3105 3106 /* turn off just the unbound flag */ 3107 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3108 SCTP_INP_WUNLOCK(inp); 3109 SCTP_INP_INFO_WUNLOCK(); 3110 return (0); 3111 } 3112 3113 3114 static void 3115 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3116 { 3117 struct sctp_iterator *it, *nit; 3118 3119 /* 3120 * We enter with the only the ITERATOR_LOCK in place and a write 3121 * lock on the inp_info stuff. 3122 */ 3123 it = sctp_it_ctl.cur_it; 3124 if (it && (it->vn != curvnet)) { 3125 /* Its not looking at our VNET */ 3126 return; 3127 } 3128 if (it && (it->inp == inp)) { 3129 /* 3130 * This is tricky and we hold the iterator lock, but when it 3131 * returns and gets the lock (when we release it) the 3132 * iterator will try to operate on inp. We need to stop that 3133 * from happening. But of course the iterator has a 3134 * reference on the stcb and inp. We can mark it and it will 3135 * stop. 3136 * 3137 * If its a single iterator situation, we set the end iterator 3138 * flag. Otherwise we set the iterator to go to the next 3139 * inp. 3140 * 3141 */ 3142 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3143 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3144 } else { 3145 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3146 } 3147 } 3148 /* 3149 * Now go through and remove any single reference to our inp that 3150 * may be still pending on the list 3151 */ 3152 SCTP_IPI_ITERATOR_WQ_LOCK(); 3153 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3154 if (it->vn != curvnet) { 3155 continue; 3156 } 3157 if (it->inp == inp) { 3158 /* This one points to me is it inp specific? */ 3159 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3160 /* Remove and free this one */ 3161 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3162 it, sctp_nxt_itr); 3163 if (it->function_atend != NULL) { 3164 (*it->function_atend) (it->pointer, it->val); 3165 } 3166 SCTP_FREE(it, SCTP_M_ITER); 3167 } else { 3168 it->inp = LIST_NEXT(it->inp, sctp_list); 3169 if (it->inp) { 3170 SCTP_INP_INCR_REF(it->inp); 3171 } 3172 } 3173 /* 3174 * When its put in the refcnt is incremented so decr 3175 * it 3176 */ 3177 SCTP_INP_DECR_REF(inp); 3178 } 3179 } 3180 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3181 } 3182 3183 /* release sctp_inpcb unbind the port */ 3184 void 3185 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3186 { 3187 /* 3188 * Here we free a endpoint. We must find it (if it is in the Hash 3189 * table) and remove it from there. Then we must also find it in the 3190 * overall list and remove it from there. After all removals are 3191 * complete then any timer has to be stopped. Then start the actual 3192 * freeing. a) Any local lists. b) Any associations. c) The hash of 3193 * all associations. d) finally the ep itself. 3194 */ 3195 struct sctp_tcb *asoc, *nasoc; 3196 struct sctp_laddr *laddr, *nladdr; 3197 struct inpcb *ip_pcb; 3198 struct socket *so; 3199 int being_refed = 0; 3200 struct sctp_queued_to_read *sq, *nsq; 3201 int cnt; 3202 sctp_sharedkey_t *shared_key, *nshared_key; 3203 3204 3205 #ifdef SCTP_LOG_CLOSING 3206 sctp_log_closing(inp, NULL, 0); 3207 #endif 3208 SCTP_ITERATOR_LOCK(); 3209 /* mark any iterators on the list or being processed */ 3210 sctp_iterator_inp_being_freed(inp); 3211 SCTP_ITERATOR_UNLOCK(); 3212 so = inp->sctp_socket; 3213 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3214 /* been here before.. eeks.. get out of here */ 3215 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3216 #ifdef SCTP_LOG_CLOSING 3217 sctp_log_closing(inp, NULL, 1); 3218 #endif 3219 return; 3220 } 3221 SCTP_ASOC_CREATE_LOCK(inp); 3222 SCTP_INP_INFO_WLOCK(); 3223 3224 SCTP_INP_WLOCK(inp); 3225 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3226 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3227 /* socket is gone, so no more wakeups allowed */ 3228 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3229 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3230 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3231 3232 } 3233 /* First time through we have the socket lock, after that no more. */ 3234 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3235 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3236 3237 if (inp->control) { 3238 sctp_m_freem(inp->control); 3239 inp->control = NULL; 3240 } 3241 if (inp->pkt) { 3242 sctp_m_freem(inp->pkt); 3243 inp->pkt = NULL; 3244 } 3245 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3246 * here but I will be nice :> (i.e. 3247 * ip_pcb = ep;) */ 3248 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3249 int cnt_in_sd; 3250 3251 cnt_in_sd = 0; 3252 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3253 SCTP_TCB_LOCK(asoc); 3254 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3255 /* Skip guys being freed */ 3256 cnt_in_sd++; 3257 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3258 /* 3259 * Special case - we did not start a 3260 * kill timer on the asoc due to it 3261 * was not closed. So go ahead and 3262 * start it now. 3263 */ 3264 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3265 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3266 } 3267 SCTP_TCB_UNLOCK(asoc); 3268 continue; 3269 } 3270 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3271 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3272 (asoc->asoc.total_output_queue_size == 0)) { 3273 /* 3274 * If we have data in queue, we don't want 3275 * to just free since the app may have done, 3276 * send()/close or connect/send/close. And 3277 * it wants the data to get across first. 3278 */ 3279 /* Just abandon things in the front states */ 3280 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3281 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3282 cnt_in_sd++; 3283 } 3284 continue; 3285 } 3286 /* Disconnect the socket please */ 3287 asoc->sctp_socket = NULL; 3288 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3289 if ((asoc->asoc.size_on_reasm_queue > 0) || 3290 (asoc->asoc.control_pdapi) || 3291 (asoc->asoc.size_on_all_streams > 0) || 3292 (so && (so->so_rcv.sb_cc > 0))) { 3293 /* Left with Data unread */ 3294 struct mbuf *op_err; 3295 3296 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3297 0, M_NOWAIT, 1, MT_DATA); 3298 if (op_err) { 3299 /* Fill in the user initiated abort */ 3300 struct sctp_paramhdr *ph; 3301 uint32_t *ippp; 3302 3303 SCTP_BUF_LEN(op_err) = 3304 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3305 ph = mtod(op_err, 3306 struct sctp_paramhdr *); 3307 ph->param_type = htons( 3308 SCTP_CAUSE_USER_INITIATED_ABT); 3309 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3310 ippp = (uint32_t *) (ph + 1); 3311 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3312 } 3313 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3314 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3315 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3316 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3317 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3318 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3319 } 3320 if (sctp_free_assoc(inp, asoc, 3321 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3322 cnt_in_sd++; 3323 } 3324 continue; 3325 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3326 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3327 (asoc->asoc.stream_queue_cnt == 0)) { 3328 if (asoc->asoc.locked_on_sending) { 3329 goto abort_anyway; 3330 } 3331 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3332 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3333 struct sctp_nets *netp; 3334 3335 if (asoc->asoc.alternate) { 3336 netp = asoc->asoc.alternate; 3337 } else { 3338 netp = asoc->asoc.primary_destination; 3339 } 3340 /* 3341 * there is nothing queued to send, 3342 * so I send shutdown 3343 */ 3344 sctp_send_shutdown(asoc, netp); 3345 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3346 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3347 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3348 } 3349 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3350 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3351 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3352 netp); 3353 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3354 asoc->asoc.primary_destination); 3355 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3356 } 3357 } else { 3358 /* mark into shutdown pending */ 3359 struct sctp_stream_queue_pending *sp; 3360 3361 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3362 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3363 asoc->asoc.primary_destination); 3364 if (asoc->asoc.locked_on_sending) { 3365 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3366 sctp_streamhead); 3367 if (sp == NULL) { 3368 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3369 (void *)asoc->asoc.locked_on_sending, 3370 asoc->asoc.locked_on_sending->stream_no); 3371 } else { 3372 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3373 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3374 } 3375 } 3376 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3377 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3378 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3379 struct mbuf *op_err; 3380 3381 abort_anyway: 3382 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3383 0, M_NOWAIT, 1, MT_DATA); 3384 if (op_err) { 3385 /* 3386 * Fill in the user 3387 * initiated abort 3388 */ 3389 struct sctp_paramhdr *ph; 3390 uint32_t *ippp; 3391 3392 SCTP_BUF_LEN(op_err) = 3393 (sizeof(struct sctp_paramhdr) + 3394 sizeof(uint32_t)); 3395 ph = mtod(op_err, 3396 struct sctp_paramhdr *); 3397 ph->param_type = htons( 3398 SCTP_CAUSE_USER_INITIATED_ABT); 3399 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3400 ippp = (uint32_t *) (ph + 1); 3401 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3402 } 3403 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3404 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3405 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3406 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3407 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3408 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3409 } 3410 if (sctp_free_assoc(inp, asoc, 3411 SCTP_PCBFREE_NOFORCE, 3412 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3413 cnt_in_sd++; 3414 } 3415 continue; 3416 } else { 3417 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3418 } 3419 } 3420 cnt_in_sd++; 3421 SCTP_TCB_UNLOCK(asoc); 3422 } 3423 /* now is there some left in our SHUTDOWN state? */ 3424 if (cnt_in_sd) { 3425 #ifdef SCTP_LOG_CLOSING 3426 sctp_log_closing(inp, NULL, 2); 3427 #endif 3428 inp->sctp_socket = NULL; 3429 SCTP_INP_WUNLOCK(inp); 3430 SCTP_ASOC_CREATE_UNLOCK(inp); 3431 SCTP_INP_INFO_WUNLOCK(); 3432 return; 3433 } 3434 } 3435 inp->sctp_socket = NULL; 3436 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3437 SCTP_PCB_FLAGS_UNBOUND) { 3438 /* 3439 * ok, this guy has been bound. It's port is somewhere in 3440 * the SCTP_BASE_INFO(hash table). Remove it! 3441 */ 3442 LIST_REMOVE(inp, sctp_hash); 3443 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3444 } 3445 /* 3446 * If there is a timer running to kill us, forget it, since it may 3447 * have a contest on the INP lock.. which would cause us to die ... 3448 */ 3449 cnt = 0; 3450 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3451 SCTP_TCB_LOCK(asoc); 3452 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3453 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3454 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3455 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3456 } 3457 cnt++; 3458 SCTP_TCB_UNLOCK(asoc); 3459 continue; 3460 } 3461 /* Free associations that are NOT killing us */ 3462 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3463 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3464 struct mbuf *op_err; 3465 uint32_t *ippp; 3466 3467 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3468 0, M_NOWAIT, 1, MT_DATA); 3469 if (op_err) { 3470 /* Fill in the user initiated abort */ 3471 struct sctp_paramhdr *ph; 3472 3473 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3474 sizeof(uint32_t)); 3475 ph = mtod(op_err, struct sctp_paramhdr *); 3476 ph->param_type = htons( 3477 SCTP_CAUSE_USER_INITIATED_ABT); 3478 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3479 ippp = (uint32_t *) (ph + 1); 3480 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3481 3482 } 3483 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3484 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3485 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3486 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3487 cnt++; 3488 SCTP_TCB_UNLOCK(asoc); 3489 continue; 3490 } 3491 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3492 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3493 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3494 } 3495 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3496 cnt++; 3497 } 3498 } 3499 if (cnt) { 3500 /* Ok we have someone out there that will kill us */ 3501 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3502 #ifdef SCTP_LOG_CLOSING 3503 sctp_log_closing(inp, NULL, 3); 3504 #endif 3505 SCTP_INP_WUNLOCK(inp); 3506 SCTP_ASOC_CREATE_UNLOCK(inp); 3507 SCTP_INP_INFO_WUNLOCK(); 3508 return; 3509 } 3510 if (SCTP_INP_LOCK_CONTENDED(inp)) 3511 being_refed++; 3512 if (SCTP_INP_READ_CONTENDED(inp)) 3513 being_refed++; 3514 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3515 being_refed++; 3516 3517 if ((inp->refcount) || 3518 (being_refed) || 3519 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3520 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3521 #ifdef SCTP_LOG_CLOSING 3522 sctp_log_closing(inp, NULL, 4); 3523 #endif 3524 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3525 SCTP_INP_WUNLOCK(inp); 3526 SCTP_ASOC_CREATE_UNLOCK(inp); 3527 SCTP_INP_INFO_WUNLOCK(); 3528 return; 3529 } 3530 inp->sctp_ep.signature_change.type = 0; 3531 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3532 /* 3533 * Remove it from the list .. last thing we need a lock for. 3534 */ 3535 LIST_REMOVE(inp, sctp_list); 3536 SCTP_INP_WUNLOCK(inp); 3537 SCTP_ASOC_CREATE_UNLOCK(inp); 3538 SCTP_INP_INFO_WUNLOCK(); 3539 /* 3540 * Now we release all locks. Since this INP cannot be found anymore 3541 * except possibly by the kill timer that might be running. We call 3542 * the drain function here. It should hit the case were it sees the 3543 * ACTIVE flag cleared and exit out freeing us to proceed and 3544 * destroy everything. 3545 */ 3546 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3547 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3548 } else { 3549 /* Probably un-needed */ 3550 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3551 } 3552 3553 #ifdef SCTP_LOG_CLOSING 3554 sctp_log_closing(inp, NULL, 5); 3555 #endif 3556 3557 3558 if ((inp->sctp_asocidhash) != NULL) { 3559 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3560 inp->sctp_asocidhash = NULL; 3561 } 3562 /* sa_ignore FREED_MEMORY */ 3563 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3564 /* Its only abandoned if it had data left */ 3565 if (sq->length) 3566 SCTP_STAT_INCR(sctps_left_abandon); 3567 3568 TAILQ_REMOVE(&inp->read_queue, sq, next); 3569 sctp_free_remote_addr(sq->whoFrom); 3570 if (so) 3571 so->so_rcv.sb_cc -= sq->length; 3572 if (sq->data) { 3573 sctp_m_freem(sq->data); 3574 sq->data = NULL; 3575 } 3576 /* 3577 * no need to free the net count, since at this point all 3578 * assoc's are gone. 3579 */ 3580 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3581 SCTP_DECR_READQ_COUNT(); 3582 } 3583 /* Now the sctp_pcb things */ 3584 /* 3585 * free each asoc if it is not already closed/free. we can't use the 3586 * macro here since le_next will get freed as part of the 3587 * sctp_free_assoc() call. 3588 */ 3589 if (so) { 3590 #ifdef IPSEC 3591 ipsec_delete_pcbpolicy(ip_pcb); 3592 #endif /* IPSEC */ 3593 3594 /* Unlocks not needed since the socket is gone now */ 3595 } 3596 if (ip_pcb->inp_options) { 3597 (void)sctp_m_free(ip_pcb->inp_options); 3598 ip_pcb->inp_options = 0; 3599 } 3600 #ifdef INET6 3601 if (ip_pcb->inp_vflag & INP_IPV6) { 3602 struct in6pcb *in6p; 3603 3604 in6p = (struct in6pcb *)inp; 3605 ip6_freepcbopts(in6p->in6p_outputopts); 3606 } 3607 #endif /* INET6 */ 3608 ip_pcb->inp_vflag = 0; 3609 /* free up authentication fields */ 3610 if (inp->sctp_ep.local_auth_chunks != NULL) 3611 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3612 if (inp->sctp_ep.local_hmacs != NULL) 3613 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3614 3615 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3616 LIST_REMOVE(shared_key, next); 3617 sctp_free_sharedkey(shared_key); 3618 /* sa_ignore FREED_MEMORY */ 3619 } 3620 3621 /* 3622 * if we have an address list the following will free the list of 3623 * ifaddr's that are set into this ep. Again macro limitations here, 3624 * since the LIST_FOREACH could be a bad idea. 3625 */ 3626 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3627 sctp_remove_laddr(laddr); 3628 } 3629 3630 #ifdef SCTP_TRACK_FREED_ASOCS 3631 /* TEMP CODE */ 3632 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3633 LIST_REMOVE(asoc, sctp_tcblist); 3634 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3635 SCTP_DECR_ASOC_COUNT(); 3636 } 3637 /* *** END TEMP CODE *** */ 3638 #endif 3639 /* Now lets see about freeing the EP hash table. */ 3640 if (inp->sctp_tcbhash != NULL) { 3641 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3642 inp->sctp_tcbhash = NULL; 3643 } 3644 /* Now we must put the ep memory back into the zone pool */ 3645 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3646 SCTP_INP_LOCK_DESTROY(inp); 3647 SCTP_INP_READ_DESTROY(inp); 3648 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3649 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3650 SCTP_DECR_EP_COUNT(); 3651 } 3652 3653 3654 struct sctp_nets * 3655 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3656 { 3657 struct sctp_nets *net; 3658 3659 /* locate the address */ 3660 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3661 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3662 return (net); 3663 } 3664 return (NULL); 3665 } 3666 3667 3668 int 3669 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3670 { 3671 struct sctp_ifa *sctp_ifa; 3672 3673 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3674 if (sctp_ifa) { 3675 return (1); 3676 } else { 3677 return (0); 3678 } 3679 } 3680 3681 /* 3682 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3683 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3684 * stats of stuff. 3685 */ 3686 int 3687 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3688 struct sctp_nets **netp, int set_scope, int from) 3689 { 3690 /* 3691 * The following is redundant to the same lines in the 3692 * sctp_aloc_assoc() but is needed since others call the add address 3693 * function 3694 */ 3695 struct sctp_nets *net, *netfirst; 3696 int addr_inscope; 3697 3698 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3699 from); 3700 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3701 3702 netfirst = sctp_findnet(stcb, newaddr); 3703 if (netfirst) { 3704 /* 3705 * Lie and return ok, we don't want to make the association 3706 * go away for this behavior. It will happen in the TCP 3707 * model in a connected socket. It does not reach the hash 3708 * table until after the association is built so it can't be 3709 * found. Mark as reachable, since the initial creation will 3710 * have been cleared and the NOT_IN_ASSOC flag will have 3711 * been added... and we don't want to end up removing it 3712 * back out. 3713 */ 3714 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3715 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3716 SCTP_ADDR_UNCONFIRMED); 3717 } else { 3718 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3719 } 3720 3721 return (0); 3722 } 3723 addr_inscope = 1; 3724 switch (newaddr->sa_family) { 3725 #ifdef INET 3726 case AF_INET: 3727 { 3728 struct sockaddr_in *sin; 3729 3730 sin = (struct sockaddr_in *)newaddr; 3731 if (sin->sin_addr.s_addr == 0) { 3732 /* Invalid address */ 3733 return (-1); 3734 } 3735 /* zero out the bzero area */ 3736 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3737 3738 /* assure len is set */ 3739 sin->sin_len = sizeof(struct sockaddr_in); 3740 if (set_scope) { 3741 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3742 stcb->ipv4_local_scope = 1; 3743 #else 3744 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3745 stcb->asoc.ipv4_local_scope = 1; 3746 } 3747 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3748 } else { 3749 /* Validate the address is in scope */ 3750 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3751 (stcb->asoc.ipv4_local_scope == 0)) { 3752 addr_inscope = 0; 3753 } 3754 } 3755 break; 3756 } 3757 #endif 3758 #ifdef INET6 3759 case AF_INET6: 3760 { 3761 struct sockaddr_in6 *sin6; 3762 3763 sin6 = (struct sockaddr_in6 *)newaddr; 3764 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3765 /* Invalid address */ 3766 return (-1); 3767 } 3768 /* assure len is set */ 3769 sin6->sin6_len = sizeof(struct sockaddr_in6); 3770 if (set_scope) { 3771 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3772 stcb->asoc.loopback_scope = 1; 3773 stcb->asoc.local_scope = 0; 3774 stcb->asoc.ipv4_local_scope = 1; 3775 stcb->asoc.site_scope = 1; 3776 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3777 /* 3778 * If the new destination is a 3779 * LINK_LOCAL we must have common 3780 * site scope. Don't set the local 3781 * scope since we may not share all 3782 * links, only loopback can do this. 3783 * Links on the local network would 3784 * also be on our private network 3785 * for v4 too. 3786 */ 3787 stcb->asoc.ipv4_local_scope = 1; 3788 stcb->asoc.site_scope = 1; 3789 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3790 /* 3791 * If the new destination is 3792 * SITE_LOCAL then we must have site 3793 * scope in common. 3794 */ 3795 stcb->asoc.site_scope = 1; 3796 } 3797 } else { 3798 /* Validate the address is in scope */ 3799 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3800 (stcb->asoc.loopback_scope == 0)) { 3801 addr_inscope = 0; 3802 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3803 (stcb->asoc.local_scope == 0)) { 3804 addr_inscope = 0; 3805 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3806 (stcb->asoc.site_scope == 0)) { 3807 addr_inscope = 0; 3808 } 3809 } 3810 break; 3811 } 3812 #endif 3813 default: 3814 /* not supported family type */ 3815 return (-1); 3816 } 3817 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3818 if (net == NULL) { 3819 return (-1); 3820 } 3821 SCTP_INCR_RADDR_COUNT(); 3822 bzero(net, sizeof(struct sctp_nets)); 3823 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3824 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3825 switch (newaddr->sa_family) { 3826 #ifdef INET 3827 case AF_INET: 3828 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3829 break; 3830 #endif 3831 #ifdef INET6 3832 case AF_INET6: 3833 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3834 break; 3835 #endif 3836 default: 3837 break; 3838 } 3839 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3840 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3841 stcb->asoc.loopback_scope = 1; 3842 stcb->asoc.ipv4_local_scope = 1; 3843 stcb->asoc.local_scope = 0; 3844 stcb->asoc.site_scope = 1; 3845 addr_inscope = 1; 3846 } 3847 net->failure_threshold = stcb->asoc.def_net_failure; 3848 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3849 if (addr_inscope == 0) { 3850 net->dest_state = (SCTP_ADDR_REACHABLE | 3851 SCTP_ADDR_OUT_OF_SCOPE); 3852 } else { 3853 if (from == SCTP_ADDR_IS_CONFIRMED) 3854 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3855 net->dest_state = SCTP_ADDR_REACHABLE; 3856 else 3857 net->dest_state = SCTP_ADDR_REACHABLE | 3858 SCTP_ADDR_UNCONFIRMED; 3859 } 3860 /* 3861 * We set this to 0, the timer code knows that this means its an 3862 * initial value 3863 */ 3864 net->rto_needed = 1; 3865 net->RTO = 0; 3866 net->RTO_measured = 0; 3867 stcb->asoc.numnets++; 3868 net->ref_count = 1; 3869 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3870 net->port = stcb->asoc.port; 3871 net->dscp = stcb->asoc.default_dscp; 3872 #ifdef INET6 3873 net->flowlabel = stcb->asoc.default_flowlabel; 3874 #endif 3875 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3876 net->dest_state |= SCTP_ADDR_NOHB; 3877 } else { 3878 net->dest_state &= ~SCTP_ADDR_NOHB; 3879 } 3880 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3881 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3882 } else { 3883 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3884 } 3885 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3886 /* Init the timer structure */ 3887 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3888 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3889 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3890 3891 /* Now generate a route for this guy */ 3892 #ifdef INET6 3893 /* KAME hack: embed scopeid */ 3894 if (newaddr->sa_family == AF_INET6) { 3895 struct sockaddr_in6 *sin6; 3896 3897 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3898 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3899 sin6->sin6_scope_id = 0; 3900 } 3901 #endif 3902 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3903 3904 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3905 /* Get source address */ 3906 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3907 stcb, 3908 (sctp_route_t *) & net->ro, 3909 net, 3910 0, 3911 stcb->asoc.vrf_id); 3912 /* Now get the interface MTU */ 3913 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3914 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3915 } 3916 if (net->mtu > 0) { 3917 uint32_t rmtu; 3918 3919 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3920 if (rmtu == 0) { 3921 /* 3922 * Start things off to match mtu of 3923 * interface please. 3924 */ 3925 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3926 net->ro.ro_rt, net->mtu); 3927 } else { 3928 /* 3929 * we take the route mtu over the interface, 3930 * since the route may be leading out the 3931 * loopback, or a different interface. 3932 */ 3933 net->mtu = rmtu; 3934 } 3935 } 3936 } 3937 if (net->mtu == 0) { 3938 switch (newaddr->sa_family) { 3939 #ifdef INET 3940 case AF_INET: 3941 net->mtu = SCTP_DEFAULT_MTU; 3942 break; 3943 #endif 3944 #ifdef INET6 3945 case AF_INET6: 3946 net->mtu = 1280; 3947 break; 3948 #endif 3949 default: 3950 break; 3951 } 3952 } 3953 if (net->port) { 3954 net->mtu -= (uint32_t) sizeof(struct udphdr); 3955 } 3956 if (from == SCTP_ALLOC_ASOC) { 3957 stcb->asoc.smallest_mtu = net->mtu; 3958 } 3959 if (stcb->asoc.smallest_mtu > net->mtu) { 3960 stcb->asoc.smallest_mtu = net->mtu; 3961 } 3962 #ifdef INET6 3963 if (newaddr->sa_family == AF_INET6) { 3964 struct sockaddr_in6 *sin6; 3965 3966 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3967 (void)sa6_recoverscope(sin6); 3968 } 3969 #endif 3970 3971 /* JRS - Use the congestion control given in the CC module */ 3972 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 3973 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 3974 3975 /* 3976 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3977 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3978 */ 3979 net->find_pseudo_cumack = 1; 3980 net->find_rtx_pseudo_cumack = 1; 3981 net->src_addr_selected = 0; 3982 /* Choose an initial flowid. */ 3983 net->flowid = stcb->asoc.my_vtag ^ 3984 ntohs(stcb->rport) ^ 3985 ntohs(stcb->sctp_ep->sctp_lport); 3986 #ifdef INVARIANTS 3987 net->flowidset = 1; 3988 #endif 3989 if (netp) { 3990 *netp = net; 3991 } 3992 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3993 if (net->ro.ro_rt == NULL) { 3994 /* Since we have no route put it at the back */ 3995 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3996 } else if (netfirst == NULL) { 3997 /* We are the first one in the pool. */ 3998 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3999 } else if (netfirst->ro.ro_rt == NULL) { 4000 /* 4001 * First one has NO route. Place this one ahead of the first 4002 * one. 4003 */ 4004 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4005 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4006 /* 4007 * This one has a different interface than the one at the 4008 * top of the list. Place it ahead. 4009 */ 4010 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4011 } else { 4012 /* 4013 * Ok we have the same interface as the first one. Move 4014 * forward until we find either a) one with a NULL route... 4015 * insert ahead of that b) one with a different ifp.. insert 4016 * after that. c) end of the list.. insert at the tail. 4017 */ 4018 struct sctp_nets *netlook; 4019 4020 do { 4021 netlook = TAILQ_NEXT(netfirst, sctp_next); 4022 if (netlook == NULL) { 4023 /* End of the list */ 4024 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4025 break; 4026 } else if (netlook->ro.ro_rt == NULL) { 4027 /* next one has NO route */ 4028 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4029 break; 4030 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4031 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4032 net, sctp_next); 4033 break; 4034 } 4035 /* Shift forward */ 4036 netfirst = netlook; 4037 } while (netlook != NULL); 4038 } 4039 4040 /* got to have a primary set */ 4041 if (stcb->asoc.primary_destination == 0) { 4042 stcb->asoc.primary_destination = net; 4043 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4044 (net->ro.ro_rt) && 4045 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4046 /* No route to current primary adopt new primary */ 4047 stcb->asoc.primary_destination = net; 4048 } 4049 /* Validate primary is first */ 4050 net = TAILQ_FIRST(&stcb->asoc.nets); 4051 if ((net != stcb->asoc.primary_destination) && 4052 (stcb->asoc.primary_destination)) { 4053 /* 4054 * first one on the list is NOT the primary sctp_cmpaddr() 4055 * is much more efficient if the primary is the first on the 4056 * list, make it so. 4057 */ 4058 TAILQ_REMOVE(&stcb->asoc.nets, 4059 stcb->asoc.primary_destination, sctp_next); 4060 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4061 stcb->asoc.primary_destination, sctp_next); 4062 } 4063 return (0); 4064 } 4065 4066 4067 static uint32_t 4068 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4069 { 4070 uint32_t id; 4071 struct sctpasochead *head; 4072 struct sctp_tcb *lstcb; 4073 4074 SCTP_INP_WLOCK(inp); 4075 try_again: 4076 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4077 /* TSNH */ 4078 SCTP_INP_WUNLOCK(inp); 4079 return (0); 4080 } 4081 /* 4082 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4083 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4084 */ 4085 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4086 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4087 } 4088 id = inp->sctp_associd_counter; 4089 inp->sctp_associd_counter++; 4090 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4091 if (lstcb) { 4092 goto try_again; 4093 } 4094 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4095 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4096 stcb->asoc.in_asocid_hash = 1; 4097 SCTP_INP_WUNLOCK(inp); 4098 return id; 4099 } 4100 4101 /* 4102 * allocate an association and add it to the endpoint. The caller must be 4103 * careful to add all additional addresses once they are know right away or 4104 * else the assoc will be may experience a blackout scenario. 4105 */ 4106 struct sctp_tcb * 4107 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4108 int *error, uint32_t override_tag, uint32_t vrf_id, 4109 struct thread *p 4110 ) 4111 { 4112 /* note the p argument is only valid in unbound sockets */ 4113 4114 struct sctp_tcb *stcb; 4115 struct sctp_association *asoc; 4116 struct sctpasochead *head; 4117 uint16_t rport; 4118 int err; 4119 4120 /* 4121 * Assumption made here: Caller has done a 4122 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4123 * address does not exist already. 4124 */ 4125 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4126 /* Hit max assoc, sorry no more */ 4127 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4128 *error = ENOBUFS; 4129 return (NULL); 4130 } 4131 if (firstaddr == NULL) { 4132 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4133 *error = EINVAL; 4134 return (NULL); 4135 } 4136 SCTP_INP_RLOCK(inp); 4137 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4138 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4139 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4140 /* 4141 * If its in the TCP pool, its NOT allowed to create an 4142 * association. The parent listener needs to call 4143 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4144 * off, or connected one does this.. its an error. 4145 */ 4146 SCTP_INP_RUNLOCK(inp); 4147 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4148 *error = EINVAL; 4149 return (NULL); 4150 } 4151 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4152 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4153 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4154 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4155 SCTP_INP_RUNLOCK(inp); 4156 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4157 *error = EINVAL; 4158 return (NULL); 4159 } 4160 } 4161 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4162 #ifdef SCTP_DEBUG 4163 if (firstaddr) { 4164 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4165 switch (firstaddr->sa_family) { 4166 #ifdef INET 4167 case AF_INET: 4168 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4169 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4170 break; 4171 #endif 4172 #ifdef INET6 4173 case AF_INET6: 4174 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4175 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4176 break; 4177 #endif 4178 default: 4179 break; 4180 } 4181 } else { 4182 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4183 } 4184 #endif /* SCTP_DEBUG */ 4185 switch (firstaddr->sa_family) { 4186 #ifdef INET 4187 case AF_INET: 4188 { 4189 struct sockaddr_in *sin; 4190 4191 sin = (struct sockaddr_in *)firstaddr; 4192 if ((ntohs(sin->sin_port) == 0) || 4193 (sin->sin_addr.s_addr == INADDR_ANY) || 4194 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4195 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4196 /* Invalid address */ 4197 SCTP_INP_RUNLOCK(inp); 4198 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4199 *error = EINVAL; 4200 return (NULL); 4201 } 4202 rport = sin->sin_port; 4203 break; 4204 } 4205 #endif 4206 #ifdef INET6 4207 case AF_INET6: 4208 { 4209 struct sockaddr_in6 *sin6; 4210 4211 sin6 = (struct sockaddr_in6 *)firstaddr; 4212 if ((ntohs(sin6->sin6_port) == 0) || 4213 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4214 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4215 /* Invalid address */ 4216 SCTP_INP_RUNLOCK(inp); 4217 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4218 *error = EINVAL; 4219 return (NULL); 4220 } 4221 rport = sin6->sin6_port; 4222 break; 4223 } 4224 #endif 4225 default: 4226 /* not supported family type */ 4227 SCTP_INP_RUNLOCK(inp); 4228 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4229 *error = EINVAL; 4230 return (NULL); 4231 } 4232 SCTP_INP_RUNLOCK(inp); 4233 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4234 /* 4235 * If you have not performed a bind, then we need to do the 4236 * ephemeral bind for you. 4237 */ 4238 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4239 (struct sockaddr *)NULL, 4240 (struct sctp_ifa *)NULL, 4241 p 4242 ))) { 4243 /* bind error, probably perm */ 4244 *error = err; 4245 return (NULL); 4246 } 4247 } 4248 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4249 if (stcb == NULL) { 4250 /* out of memory? */ 4251 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4252 *error = ENOMEM; 4253 return (NULL); 4254 } 4255 SCTP_INCR_ASOC_COUNT(); 4256 4257 bzero(stcb, sizeof(*stcb)); 4258 asoc = &stcb->asoc; 4259 4260 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4261 SCTP_TCB_LOCK_INIT(stcb); 4262 SCTP_TCB_SEND_LOCK_INIT(stcb); 4263 stcb->rport = rport; 4264 /* setup back pointer's */ 4265 stcb->sctp_ep = inp; 4266 stcb->sctp_socket = inp->sctp_socket; 4267 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4268 /* failed */ 4269 SCTP_TCB_LOCK_DESTROY(stcb); 4270 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4271 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4272 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4273 SCTP_DECR_ASOC_COUNT(); 4274 *error = err; 4275 return (NULL); 4276 } 4277 /* and the port */ 4278 SCTP_INP_INFO_WLOCK(); 4279 SCTP_INP_WLOCK(inp); 4280 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4281 /* inpcb freed while alloc going on */ 4282 SCTP_TCB_LOCK_DESTROY(stcb); 4283 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4284 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4285 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4286 SCTP_INP_WUNLOCK(inp); 4287 SCTP_INP_INFO_WUNLOCK(); 4288 SCTP_DECR_ASOC_COUNT(); 4289 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4290 *error = EINVAL; 4291 return (NULL); 4292 } 4293 SCTP_TCB_LOCK(stcb); 4294 4295 /* now that my_vtag is set, add it to the hash */ 4296 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4297 /* put it in the bucket in the vtag hash of assoc's for the system */ 4298 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4299 SCTP_INP_INFO_WUNLOCK(); 4300 4301 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4302 /* failure.. memory error? */ 4303 if (asoc->strmout) { 4304 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4305 asoc->strmout = NULL; 4306 } 4307 if (asoc->mapping_array) { 4308 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4309 asoc->mapping_array = NULL; 4310 } 4311 if (asoc->nr_mapping_array) { 4312 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4313 asoc->nr_mapping_array = NULL; 4314 } 4315 SCTP_DECR_ASOC_COUNT(); 4316 SCTP_TCB_LOCK_DESTROY(stcb); 4317 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4318 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4319 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4320 SCTP_INP_WUNLOCK(inp); 4321 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4322 *error = ENOBUFS; 4323 return (NULL); 4324 } 4325 /* Init all the timers */ 4326 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4327 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4328 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4329 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4330 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4331 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4332 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4333 4334 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4335 /* now file the port under the hash as well */ 4336 if (inp->sctp_tcbhash != NULL) { 4337 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4338 inp->sctp_hashmark)]; 4339 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4340 } 4341 SCTP_INP_WUNLOCK(inp); 4342 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4343 return (stcb); 4344 } 4345 4346 4347 void 4348 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4349 { 4350 struct sctp_association *asoc; 4351 4352 asoc = &stcb->asoc; 4353 asoc->numnets--; 4354 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4355 if (net == asoc->primary_destination) { 4356 /* Reset primary */ 4357 struct sctp_nets *lnet; 4358 4359 lnet = TAILQ_FIRST(&asoc->nets); 4360 /* 4361 * Mobility adaptation Ideally, if deleted destination is 4362 * the primary, it becomes a fast retransmission trigger by 4363 * the subsequent SET PRIMARY. (by micchie) 4364 */ 4365 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4366 SCTP_MOBILITY_BASE) || 4367 sctp_is_mobility_feature_on(stcb->sctp_ep, 4368 SCTP_MOBILITY_FASTHANDOFF)) { 4369 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4370 if (asoc->deleted_primary != NULL) { 4371 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4372 goto out; 4373 } 4374 asoc->deleted_primary = net; 4375 atomic_add_int(&net->ref_count, 1); 4376 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4377 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4378 sctp_mobility_feature_on(stcb->sctp_ep, 4379 SCTP_MOBILITY_PRIM_DELETED); 4380 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4381 stcb->sctp_ep, stcb, NULL); 4382 } 4383 out: 4384 /* Try to find a confirmed primary */ 4385 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4386 } 4387 if (net == asoc->last_data_chunk_from) { 4388 /* Reset primary */ 4389 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4390 } 4391 if (net == asoc->last_control_chunk_from) { 4392 /* Clear net */ 4393 asoc->last_control_chunk_from = NULL; 4394 } 4395 if (net == stcb->asoc.alternate) { 4396 sctp_free_remote_addr(stcb->asoc.alternate); 4397 stcb->asoc.alternate = NULL; 4398 } 4399 sctp_free_remote_addr(net); 4400 } 4401 4402 /* 4403 * remove a remote endpoint address from an association, it will fail if the 4404 * address does not exist. 4405 */ 4406 int 4407 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4408 { 4409 /* 4410 * Here we need to remove a remote address. This is quite simple, we 4411 * first find it in the list of address for the association 4412 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4413 * on that item. Note we do not allow it to be removed if there are 4414 * no other addresses. 4415 */ 4416 struct sctp_association *asoc; 4417 struct sctp_nets *net, *nnet; 4418 4419 asoc = &stcb->asoc; 4420 4421 /* locate the address */ 4422 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4423 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4424 continue; 4425 } 4426 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4427 remaddr)) { 4428 /* we found the guy */ 4429 if (asoc->numnets < 2) { 4430 /* Must have at LEAST two remote addresses */ 4431 return (-1); 4432 } else { 4433 sctp_remove_net(stcb, net); 4434 return (0); 4435 } 4436 } 4437 } 4438 /* not found. */ 4439 return (-2); 4440 } 4441 4442 void 4443 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4444 { 4445 struct sctpvtaghead *chain; 4446 struct sctp_tagblock *twait_block; 4447 int found = 0; 4448 int i; 4449 4450 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4451 if (!LIST_EMPTY(chain)) { 4452 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4453 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4454 if ((twait_block->vtag_block[i].v_tag == tag) && 4455 (twait_block->vtag_block[i].lport == lport) && 4456 (twait_block->vtag_block[i].rport == rport)) { 4457 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4458 twait_block->vtag_block[i].v_tag = 0; 4459 twait_block->vtag_block[i].lport = 0; 4460 twait_block->vtag_block[i].rport = 0; 4461 found = 1; 4462 break; 4463 } 4464 } 4465 if (found) 4466 break; 4467 } 4468 } 4469 } 4470 4471 int 4472 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4473 { 4474 struct sctpvtaghead *chain; 4475 struct sctp_tagblock *twait_block; 4476 int found = 0; 4477 int i; 4478 4479 SCTP_INP_INFO_WLOCK(); 4480 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4481 if (!LIST_EMPTY(chain)) { 4482 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4483 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4484 if ((twait_block->vtag_block[i].v_tag == tag) && 4485 (twait_block->vtag_block[i].lport == lport) && 4486 (twait_block->vtag_block[i].rport == rport)) { 4487 found = 1; 4488 break; 4489 } 4490 } 4491 if (found) 4492 break; 4493 } 4494 } 4495 SCTP_INP_INFO_WUNLOCK(); 4496 return (found); 4497 } 4498 4499 4500 void 4501 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4502 { 4503 struct sctpvtaghead *chain; 4504 struct sctp_tagblock *twait_block; 4505 struct timeval now; 4506 int set, i; 4507 4508 if (time == 0) { 4509 /* Its disabled */ 4510 return; 4511 } 4512 (void)SCTP_GETTIME_TIMEVAL(&now); 4513 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4514 set = 0; 4515 if (!LIST_EMPTY(chain)) { 4516 /* Block(s) present, lets find space, and expire on the fly */ 4517 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4518 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4519 if ((twait_block->vtag_block[i].v_tag == 0) && 4520 !set) { 4521 twait_block->vtag_block[i].tv_sec_at_expire = 4522 now.tv_sec + time; 4523 twait_block->vtag_block[i].v_tag = tag; 4524 twait_block->vtag_block[i].lport = lport; 4525 twait_block->vtag_block[i].rport = rport; 4526 set = 1; 4527 } else if ((twait_block->vtag_block[i].v_tag) && 4528 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4529 /* Audit expires this guy */ 4530 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4531 twait_block->vtag_block[i].v_tag = 0; 4532 twait_block->vtag_block[i].lport = 0; 4533 twait_block->vtag_block[i].rport = 0; 4534 if (set == 0) { 4535 /* Reuse it for my new tag */ 4536 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4537 twait_block->vtag_block[i].v_tag = tag; 4538 twait_block->vtag_block[i].lport = lport; 4539 twait_block->vtag_block[i].rport = rport; 4540 set = 1; 4541 } 4542 } 4543 } 4544 if (set) { 4545 /* 4546 * We only do up to the block where we can 4547 * place our tag for audits 4548 */ 4549 break; 4550 } 4551 } 4552 } 4553 /* Need to add a new block to chain */ 4554 if (!set) { 4555 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4556 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4557 if (twait_block == NULL) { 4558 #ifdef INVARIANTS 4559 panic("Can not alloc tagblock"); 4560 #endif 4561 return; 4562 } 4563 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4564 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4565 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4566 twait_block->vtag_block[0].v_tag = tag; 4567 twait_block->vtag_block[0].lport = lport; 4568 twait_block->vtag_block[0].rport = rport; 4569 } 4570 } 4571 4572 4573 4574 /*- 4575 * Free the association after un-hashing the remote port. This 4576 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4577 * expect that the input to this function IS a locked TCB. 4578 * It will return 0, if it did NOT destroy the association (instead 4579 * it unlocks it. It will return NON-zero if it either destroyed the 4580 * association OR the association is already destroyed. 4581 */ 4582 int 4583 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4584 { 4585 int i; 4586 struct sctp_association *asoc; 4587 struct sctp_nets *net, *nnet; 4588 struct sctp_laddr *laddr, *naddr; 4589 struct sctp_tmit_chunk *chk, *nchk; 4590 struct sctp_asconf_addr *aparam, *naparam; 4591 struct sctp_asconf_ack *aack, *naack; 4592 struct sctp_stream_reset_list *strrst, *nstrrst; 4593 struct sctp_queued_to_read *sq, *nsq; 4594 struct sctp_stream_queue_pending *sp, *nsp; 4595 sctp_sharedkey_t *shared_key, *nshared_key; 4596 struct socket *so; 4597 4598 /* first, lets purge the entry from the hash table. */ 4599 4600 #ifdef SCTP_LOG_CLOSING 4601 sctp_log_closing(inp, stcb, 6); 4602 #endif 4603 if (stcb->asoc.state == 0) { 4604 #ifdef SCTP_LOG_CLOSING 4605 sctp_log_closing(inp, NULL, 7); 4606 #endif 4607 /* there is no asoc, really TSNH :-0 */ 4608 return (1); 4609 } 4610 if (stcb->asoc.alternate) { 4611 sctp_free_remote_addr(stcb->asoc.alternate); 4612 stcb->asoc.alternate = NULL; 4613 } 4614 /* TEMP CODE */ 4615 if (stcb->freed_from_where == 0) { 4616 /* Only record the first place free happened from */ 4617 stcb->freed_from_where = from_location; 4618 } 4619 /* TEMP CODE */ 4620 4621 asoc = &stcb->asoc; 4622 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4623 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4624 /* nothing around */ 4625 so = NULL; 4626 else 4627 so = inp->sctp_socket; 4628 4629 /* 4630 * We used timer based freeing if a reader or writer is in the way. 4631 * So we first check if we are actually being called from a timer, 4632 * if so we abort early if a reader or writer is still in the way. 4633 */ 4634 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4635 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4636 /* 4637 * is it the timer driving us? if so are the reader/writers 4638 * gone? 4639 */ 4640 if (stcb->asoc.refcnt) { 4641 /* nope, reader or writer in the way */ 4642 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4643 /* no asoc destroyed */ 4644 SCTP_TCB_UNLOCK(stcb); 4645 #ifdef SCTP_LOG_CLOSING 4646 sctp_log_closing(inp, stcb, 8); 4647 #endif 4648 return (0); 4649 } 4650 } 4651 /* now clean up any other timers */ 4652 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4653 asoc->dack_timer.self = NULL; 4654 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4655 /*- 4656 * For stream reset we don't blast this unless 4657 * it is a str-reset timer, it might be the 4658 * free-asoc timer which we DON'T want to 4659 * disturb. 4660 */ 4661 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4662 asoc->strreset_timer.self = NULL; 4663 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4664 asoc->asconf_timer.self = NULL; 4665 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4666 asoc->autoclose_timer.self = NULL; 4667 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4668 asoc->shut_guard_timer.self = NULL; 4669 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4670 asoc->delayed_event_timer.self = NULL; 4671 /* Mobility adaptation */ 4672 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4673 asoc->delete_prim_timer.self = NULL; 4674 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4675 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4676 net->rxt_timer.self = NULL; 4677 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4678 net->pmtu_timer.self = NULL; 4679 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4680 net->hb_timer.self = NULL; 4681 } 4682 /* Now the read queue needs to be cleaned up (only once) */ 4683 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4684 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4685 SCTP_INP_READ_LOCK(inp); 4686 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4687 if (sq->stcb == stcb) { 4688 sq->do_not_ref_stcb = 1; 4689 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4690 /* 4691 * If there is no end, there never will be 4692 * now. 4693 */ 4694 if (sq->end_added == 0) { 4695 /* Held for PD-API clear that. */ 4696 sq->pdapi_aborted = 1; 4697 sq->held_length = 0; 4698 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4699 /* 4700 * Need to add a PD-API 4701 * aborted indication. 4702 * Setting the control_pdapi 4703 * assures that it will be 4704 * added right after this 4705 * msg. 4706 */ 4707 uint32_t strseq; 4708 4709 stcb->asoc.control_pdapi = sq; 4710 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4711 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4712 stcb, 4713 SCTP_PARTIAL_DELIVERY_ABORTED, 4714 (void *)&strseq, 4715 SCTP_SO_LOCKED); 4716 stcb->asoc.control_pdapi = NULL; 4717 } 4718 } 4719 /* Add an end to wake them */ 4720 sq->end_added = 1; 4721 } 4722 } 4723 SCTP_INP_READ_UNLOCK(inp); 4724 if (stcb->block_entry) { 4725 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4726 stcb->block_entry->error = ECONNRESET; 4727 stcb->block_entry = NULL; 4728 } 4729 } 4730 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4731 /* 4732 * Someone holds a reference OR the socket is unaccepted 4733 * yet. 4734 */ 4735 if ((stcb->asoc.refcnt) || 4736 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4737 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4738 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4739 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4740 } 4741 SCTP_TCB_UNLOCK(stcb); 4742 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4743 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4744 /* nothing around */ 4745 so = NULL; 4746 if (so) { 4747 /* Wake any reader/writers */ 4748 sctp_sorwakeup(inp, so); 4749 sctp_sowwakeup(inp, so); 4750 } 4751 #ifdef SCTP_LOG_CLOSING 4752 sctp_log_closing(inp, stcb, 9); 4753 #endif 4754 /* no asoc destroyed */ 4755 return (0); 4756 } 4757 #ifdef SCTP_LOG_CLOSING 4758 sctp_log_closing(inp, stcb, 10); 4759 #endif 4760 /* 4761 * When I reach here, no others want to kill the assoc yet.. and I 4762 * own the lock. Now its possible an abort comes in when I do the 4763 * lock exchange below to grab all the locks to do the final take 4764 * out. to prevent this we increment the count, which will start a 4765 * timer and blow out above thus assuring us that we hold exclusive 4766 * killing of the asoc. Note that after getting back the TCB lock we 4767 * will go ahead and increment the counter back up and stop any 4768 * timer a passing stranger may have started :-S 4769 */ 4770 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4771 atomic_add_int(&stcb->asoc.refcnt, 1); 4772 4773 SCTP_TCB_UNLOCK(stcb); 4774 SCTP_INP_INFO_WLOCK(); 4775 SCTP_INP_WLOCK(inp); 4776 SCTP_TCB_LOCK(stcb); 4777 } 4778 /* Double check the GONE flag */ 4779 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4780 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4781 /* nothing around */ 4782 so = NULL; 4783 4784 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4785 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4786 /* 4787 * For TCP type we need special handling when we are 4788 * connected. We also include the peel'ed off ones to. 4789 */ 4790 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4791 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4792 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4793 if (so) { 4794 SOCK_LOCK(so); 4795 if (so->so_rcv.sb_cc == 0) { 4796 so->so_state &= ~(SS_ISCONNECTING | 4797 SS_ISDISCONNECTING | 4798 SS_ISCONFIRMING | 4799 SS_ISCONNECTED); 4800 } 4801 socantrcvmore_locked(so); 4802 sctp_sowwakeup(inp, so); 4803 sctp_sorwakeup(inp, so); 4804 SCTP_SOWAKEUP(so); 4805 } 4806 } 4807 } 4808 /* 4809 * Make it invalid too, that way if its about to run it will abort 4810 * and return. 4811 */ 4812 /* re-increment the lock */ 4813 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4814 atomic_add_int(&stcb->asoc.refcnt, -1); 4815 } 4816 if (stcb->asoc.refcnt) { 4817 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4818 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4819 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4820 SCTP_INP_INFO_WUNLOCK(); 4821 SCTP_INP_WUNLOCK(inp); 4822 } 4823 SCTP_TCB_UNLOCK(stcb); 4824 return (0); 4825 } 4826 asoc->state = 0; 4827 if (inp->sctp_tcbhash) { 4828 LIST_REMOVE(stcb, sctp_tcbhash); 4829 } 4830 if (stcb->asoc.in_asocid_hash) { 4831 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4832 } 4833 /* Now lets remove it from the list of ALL associations in the EP */ 4834 LIST_REMOVE(stcb, sctp_tcblist); 4835 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4836 SCTP_INP_INCR_REF(inp); 4837 SCTP_INP_WUNLOCK(inp); 4838 } 4839 /* pull from vtag hash */ 4840 LIST_REMOVE(stcb, sctp_asocs); 4841 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4842 inp->sctp_lport, stcb->rport); 4843 4844 /* 4845 * Now restop the timers to be sure this is paranoia at is finest! 4846 */ 4847 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4848 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4849 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4850 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4851 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4852 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4853 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4854 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4855 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4856 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4857 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4858 } 4859 4860 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4861 /* 4862 * The chunk lists and such SHOULD be empty but we check them just 4863 * in case. 4864 */ 4865 /* anything on the wheel needs to be removed */ 4866 for (i = 0; i < asoc->streamoutcnt; i++) { 4867 struct sctp_stream_out *outs; 4868 4869 outs = &asoc->strmout[i]; 4870 /* now clean up any chunks here */ 4871 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4872 TAILQ_REMOVE(&outs->outqueue, sp, next); 4873 sctp_free_spbufspace(stcb, asoc, sp); 4874 if (sp->data) { 4875 if (so) { 4876 /* Still an open socket - report */ 4877 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4878 0, (void *)sp, SCTP_SO_LOCKED); 4879 } 4880 if (sp->data) { 4881 sctp_m_freem(sp->data); 4882 sp->data = NULL; 4883 sp->tail_mbuf = NULL; 4884 sp->length = 0; 4885 } 4886 } 4887 if (sp->net) { 4888 sctp_free_remote_addr(sp->net); 4889 sp->net = NULL; 4890 } 4891 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4892 } 4893 } 4894 /* sa_ignore FREED_MEMORY */ 4895 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4896 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4897 SCTP_FREE(strrst, SCTP_M_STRESET); 4898 } 4899 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4900 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4901 if (sq->data) { 4902 sctp_m_freem(sq->data); 4903 sq->data = NULL; 4904 } 4905 sctp_free_remote_addr(sq->whoFrom); 4906 sq->whoFrom = NULL; 4907 sq->stcb = NULL; 4908 /* Free the ctl entry */ 4909 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4910 SCTP_DECR_READQ_COUNT(); 4911 /* sa_ignore FREED_MEMORY */ 4912 } 4913 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4914 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4915 if (chk->data) { 4916 sctp_m_freem(chk->data); 4917 chk->data = NULL; 4918 } 4919 if (chk->holds_key_ref) 4920 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4921 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4922 SCTP_DECR_CHK_COUNT(); 4923 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4924 asoc->free_chunk_cnt--; 4925 /* sa_ignore FREED_MEMORY */ 4926 } 4927 /* pending send queue SHOULD be empty */ 4928 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4929 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4930 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4931 #ifdef INVARIANTS 4932 } else { 4933 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4934 #endif 4935 } 4936 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4937 if (chk->data) { 4938 if (so) { 4939 /* Still a socket? */ 4940 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4941 0, chk, SCTP_SO_LOCKED); 4942 } 4943 if (chk->data) { 4944 sctp_m_freem(chk->data); 4945 chk->data = NULL; 4946 } 4947 } 4948 if (chk->holds_key_ref) 4949 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4950 if (chk->whoTo) { 4951 sctp_free_remote_addr(chk->whoTo); 4952 chk->whoTo = NULL; 4953 } 4954 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4955 SCTP_DECR_CHK_COUNT(); 4956 /* sa_ignore FREED_MEMORY */ 4957 } 4958 /* sent queue SHOULD be empty */ 4959 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4960 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 4961 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4962 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4963 #ifdef INVARIANTS 4964 } else { 4965 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4966 #endif 4967 } 4968 } 4969 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4970 if (chk->data) { 4971 if (so) { 4972 /* Still a socket? */ 4973 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 4974 0, chk, SCTP_SO_LOCKED); 4975 } 4976 if (chk->data) { 4977 sctp_m_freem(chk->data); 4978 chk->data = NULL; 4979 } 4980 } 4981 if (chk->holds_key_ref) 4982 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4983 sctp_free_remote_addr(chk->whoTo); 4984 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4985 SCTP_DECR_CHK_COUNT(); 4986 /* sa_ignore FREED_MEMORY */ 4987 } 4988 #ifdef INVARIANTS 4989 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 4990 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 4991 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 4992 } 4993 } 4994 #endif 4995 /* control queue MAY not be empty */ 4996 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 4997 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4998 if (chk->data) { 4999 sctp_m_freem(chk->data); 5000 chk->data = NULL; 5001 } 5002 if (chk->holds_key_ref) 5003 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5004 sctp_free_remote_addr(chk->whoTo); 5005 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5006 SCTP_DECR_CHK_COUNT(); 5007 /* sa_ignore FREED_MEMORY */ 5008 } 5009 /* ASCONF queue MAY not be empty */ 5010 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5011 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5012 if (chk->data) { 5013 sctp_m_freem(chk->data); 5014 chk->data = NULL; 5015 } 5016 if (chk->holds_key_ref) 5017 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5018 sctp_free_remote_addr(chk->whoTo); 5019 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5020 SCTP_DECR_CHK_COUNT(); 5021 /* sa_ignore FREED_MEMORY */ 5022 } 5023 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5024 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5025 if (chk->data) { 5026 sctp_m_freem(chk->data); 5027 chk->data = NULL; 5028 } 5029 if (chk->holds_key_ref) 5030 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5031 sctp_free_remote_addr(chk->whoTo); 5032 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5033 SCTP_DECR_CHK_COUNT(); 5034 /* sa_ignore FREED_MEMORY */ 5035 } 5036 5037 if (asoc->mapping_array) { 5038 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5039 asoc->mapping_array = NULL; 5040 } 5041 if (asoc->nr_mapping_array) { 5042 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5043 asoc->nr_mapping_array = NULL; 5044 } 5045 /* the stream outs */ 5046 if (asoc->strmout) { 5047 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5048 asoc->strmout = NULL; 5049 } 5050 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5051 if (asoc->strmin) { 5052 struct sctp_queued_to_read *ctl, *nctl; 5053 5054 for (i = 0; i < asoc->streamincnt; i++) { 5055 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5056 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5057 sctp_free_remote_addr(ctl->whoFrom); 5058 if (ctl->data) { 5059 sctp_m_freem(ctl->data); 5060 ctl->data = NULL; 5061 } 5062 /* 5063 * We don't free the address here since all 5064 * the net's were freed above. 5065 */ 5066 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5067 SCTP_DECR_READQ_COUNT(); 5068 } 5069 } 5070 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5071 asoc->strmin = NULL; 5072 } 5073 asoc->streamincnt = 0; 5074 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5075 #ifdef INVARIANTS 5076 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5077 panic("no net's left alloc'ed, or list points to itself"); 5078 } 5079 #endif 5080 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5081 sctp_free_remote_addr(net); 5082 } 5083 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5084 /* sa_ignore FREED_MEMORY */ 5085 sctp_remove_laddr(laddr); 5086 } 5087 5088 /* pending asconf (address) parameters */ 5089 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5090 /* sa_ignore FREED_MEMORY */ 5091 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5092 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5093 } 5094 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5095 /* sa_ignore FREED_MEMORY */ 5096 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5097 if (aack->data != NULL) { 5098 sctp_m_freem(aack->data); 5099 } 5100 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5101 } 5102 /* clean up auth stuff */ 5103 if (asoc->local_hmacs) 5104 sctp_free_hmaclist(asoc->local_hmacs); 5105 if (asoc->peer_hmacs) 5106 sctp_free_hmaclist(asoc->peer_hmacs); 5107 5108 if (asoc->local_auth_chunks) 5109 sctp_free_chunklist(asoc->local_auth_chunks); 5110 if (asoc->peer_auth_chunks) 5111 sctp_free_chunklist(asoc->peer_auth_chunks); 5112 5113 sctp_free_authinfo(&asoc->authinfo); 5114 5115 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5116 LIST_REMOVE(shared_key, next); 5117 sctp_free_sharedkey(shared_key); 5118 /* sa_ignore FREED_MEMORY */ 5119 } 5120 5121 /* Insert new items here :> */ 5122 5123 /* Get rid of LOCK */ 5124 SCTP_TCB_LOCK_DESTROY(stcb); 5125 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5126 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5127 SCTP_INP_INFO_WUNLOCK(); 5128 SCTP_INP_RLOCK(inp); 5129 } 5130 #ifdef SCTP_TRACK_FREED_ASOCS 5131 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5132 /* now clean up the tasoc itself */ 5133 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5134 SCTP_DECR_ASOC_COUNT(); 5135 } else { 5136 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5137 } 5138 #else 5139 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5140 SCTP_DECR_ASOC_COUNT(); 5141 #endif 5142 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5143 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5144 /* 5145 * If its NOT the inp_free calling us AND sctp_close 5146 * as been called, we call back... 5147 */ 5148 SCTP_INP_RUNLOCK(inp); 5149 /* 5150 * This will start the kill timer (if we are the 5151 * last one) since we hold an increment yet. But 5152 * this is the only safe way to do this since 5153 * otherwise if the socket closes at the same time 5154 * we are here we might collide in the cleanup. 5155 */ 5156 sctp_inpcb_free(inp, 5157 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5158 SCTP_CALLED_DIRECTLY_NOCMPSET); 5159 SCTP_INP_DECR_REF(inp); 5160 goto out_of; 5161 } else { 5162 /* The socket is still open. */ 5163 SCTP_INP_DECR_REF(inp); 5164 } 5165 } 5166 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5167 SCTP_INP_RUNLOCK(inp); 5168 } 5169 out_of: 5170 /* destroyed the asoc */ 5171 #ifdef SCTP_LOG_CLOSING 5172 sctp_log_closing(inp, NULL, 11); 5173 #endif 5174 return (1); 5175 } 5176 5177 5178 5179 /* 5180 * determine if a destination is "reachable" based upon the addresses bound 5181 * to the current endpoint (e.g. only v4 or v6 currently bound) 5182 */ 5183 /* 5184 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5185 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5186 * types bound as its endpoint 5187 */ 5188 int 5189 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5190 { 5191 struct sctp_inpcb *inp; 5192 int answer; 5193 5194 /* 5195 * No locks here, the TCB, in all cases is already locked and an 5196 * assoc is up. There is either a INP lock by the caller applied (in 5197 * asconf case when deleting an address) or NOT in the HB case, 5198 * however if HB then the INP increment is up and the INP will not 5199 * be removed (on top of the fact that we have a TCB lock). So we 5200 * only want to read the sctp_flags, which is either bound-all or 5201 * not.. no protection needed since once an assoc is up you can't be 5202 * changing your binding. 5203 */ 5204 inp = stcb->sctp_ep; 5205 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5206 /* if bound all, destination is not restricted */ 5207 /* 5208 * RRS: Question during lock work: Is this correct? If you 5209 * are bound-all you still might need to obey the V4--V6 5210 * flags??? IMO this bound-all stuff needs to be removed! 5211 */ 5212 return (1); 5213 } 5214 /* NOTE: all "scope" checks are done when local addresses are added */ 5215 switch (destaddr->sa_family) { 5216 #ifdef INET6 5217 case AF_INET6: 5218 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5219 break; 5220 #endif 5221 #ifdef INET 5222 case AF_INET: 5223 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5224 break; 5225 #endif 5226 default: 5227 /* invalid family, so it's unreachable */ 5228 answer = 0; 5229 break; 5230 } 5231 return (answer); 5232 } 5233 5234 /* 5235 * update the inp_vflags on an endpoint 5236 */ 5237 static void 5238 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5239 { 5240 struct sctp_laddr *laddr; 5241 5242 /* first clear the flag */ 5243 inp->ip_inp.inp.inp_vflag = 0; 5244 /* set the flag based on addresses on the ep list */ 5245 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5246 if (laddr->ifa == NULL) { 5247 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5248 __FUNCTION__); 5249 continue; 5250 } 5251 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5252 continue; 5253 } 5254 switch (laddr->ifa->address.sa.sa_family) { 5255 #ifdef INET6 5256 case AF_INET6: 5257 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5258 break; 5259 #endif 5260 #ifdef INET 5261 case AF_INET: 5262 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5263 break; 5264 #endif 5265 default: 5266 break; 5267 } 5268 } 5269 } 5270 5271 /* 5272 * Add the address to the endpoint local address list There is nothing to be 5273 * done if we are bound to all addresses 5274 */ 5275 void 5276 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5277 { 5278 struct sctp_laddr *laddr; 5279 int fnd, error = 0; 5280 5281 fnd = 0; 5282 5283 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5284 /* You are already bound to all. You have it already */ 5285 return; 5286 } 5287 #ifdef INET6 5288 if (ifa->address.sa.sa_family == AF_INET6) { 5289 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5290 /* Can't bind a non-useable addr. */ 5291 return; 5292 } 5293 } 5294 #endif 5295 /* first, is it already present? */ 5296 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5297 if (laddr->ifa == ifa) { 5298 fnd = 1; 5299 break; 5300 } 5301 } 5302 5303 if (fnd == 0) { 5304 /* Not in the ep list */ 5305 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5306 if (error != 0) 5307 return; 5308 inp->laddr_count++; 5309 /* update inp_vflag flags */ 5310 switch (ifa->address.sa.sa_family) { 5311 #ifdef INET6 5312 case AF_INET6: 5313 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5314 break; 5315 #endif 5316 #ifdef INET 5317 case AF_INET: 5318 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5319 break; 5320 #endif 5321 default: 5322 break; 5323 } 5324 } 5325 return; 5326 } 5327 5328 5329 /* 5330 * select a new (hopefully reachable) destination net (should only be used 5331 * when we deleted an ep addr that is the only usable source address to reach 5332 * the destination net) 5333 */ 5334 static void 5335 sctp_select_primary_destination(struct sctp_tcb *stcb) 5336 { 5337 struct sctp_nets *net; 5338 5339 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5340 /* for now, we'll just pick the first reachable one we find */ 5341 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5342 continue; 5343 if (sctp_destination_is_reachable(stcb, 5344 (struct sockaddr *)&net->ro._l_addr)) { 5345 /* found a reachable destination */ 5346 stcb->asoc.primary_destination = net; 5347 } 5348 } 5349 /* I can't there from here! ...we're gonna die shortly... */ 5350 } 5351 5352 5353 /* 5354 * Delete the address from the endpoint local address list There is nothing 5355 * to be done if we are bound to all addresses 5356 */ 5357 void 5358 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5359 { 5360 struct sctp_laddr *laddr; 5361 int fnd; 5362 5363 fnd = 0; 5364 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5365 /* You are already bound to all. You have it already */ 5366 return; 5367 } 5368 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5369 if (laddr->ifa == ifa) { 5370 fnd = 1; 5371 break; 5372 } 5373 } 5374 if (fnd && (inp->laddr_count < 2)) { 5375 /* can't delete unless there are at LEAST 2 addresses */ 5376 return; 5377 } 5378 if (fnd) { 5379 /* 5380 * clean up any use of this address go through our 5381 * associations and clear any last_used_address that match 5382 * this one for each assoc, see if a new primary_destination 5383 * is needed 5384 */ 5385 struct sctp_tcb *stcb; 5386 5387 /* clean up "next_addr_touse" */ 5388 if (inp->next_addr_touse == laddr) 5389 /* delete this address */ 5390 inp->next_addr_touse = NULL; 5391 5392 /* clean up "last_used_address" */ 5393 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5394 struct sctp_nets *net; 5395 5396 SCTP_TCB_LOCK(stcb); 5397 if (stcb->asoc.last_used_address == laddr) 5398 /* delete this address */ 5399 stcb->asoc.last_used_address = NULL; 5400 /* 5401 * Now spin through all the nets and purge any ref 5402 * to laddr 5403 */ 5404 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5405 if (net->ro._s_addr && 5406 (net->ro._s_addr->ifa == laddr->ifa)) { 5407 /* Yep, purge src address selected */ 5408 sctp_rtentry_t *rt; 5409 5410 /* delete this address if cached */ 5411 rt = net->ro.ro_rt; 5412 if (rt != NULL) { 5413 RTFREE(rt); 5414 net->ro.ro_rt = NULL; 5415 } 5416 sctp_free_ifa(net->ro._s_addr); 5417 net->ro._s_addr = NULL; 5418 net->src_addr_selected = 0; 5419 } 5420 } 5421 SCTP_TCB_UNLOCK(stcb); 5422 } /* for each tcb */ 5423 /* remove it from the ep list */ 5424 sctp_remove_laddr(laddr); 5425 inp->laddr_count--; 5426 /* update inp_vflag flags */ 5427 sctp_update_ep_vflag(inp); 5428 } 5429 return; 5430 } 5431 5432 /* 5433 * Add the address to the TCB local address restricted list. 5434 * This is a "pending" address list (eg. addresses waiting for an 5435 * ASCONF-ACK response) and cannot be used as a valid source address. 5436 */ 5437 void 5438 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5439 { 5440 struct sctp_laddr *laddr; 5441 struct sctpladdr *list; 5442 5443 /* 5444 * Assumes TCB is locked.. and possibly the INP. May need to 5445 * confirm/fix that if we need it and is not the case. 5446 */ 5447 list = &stcb->asoc.sctp_restricted_addrs; 5448 5449 #ifdef INET6 5450 if (ifa->address.sa.sa_family == AF_INET6) { 5451 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5452 /* Can't bind a non-existent addr. */ 5453 return; 5454 } 5455 } 5456 #endif 5457 /* does the address already exist? */ 5458 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5459 if (laddr->ifa == ifa) { 5460 return; 5461 } 5462 } 5463 5464 /* add to the list */ 5465 (void)sctp_insert_laddr(list, ifa, 0); 5466 return; 5467 } 5468 5469 /* 5470 * insert an laddr entry with the given ifa for the desired list 5471 */ 5472 int 5473 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5474 { 5475 struct sctp_laddr *laddr; 5476 5477 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5478 if (laddr == NULL) { 5479 /* out of memory? */ 5480 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5481 return (EINVAL); 5482 } 5483 SCTP_INCR_LADDR_COUNT(); 5484 bzero(laddr, sizeof(*laddr)); 5485 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5486 laddr->ifa = ifa; 5487 laddr->action = act; 5488 atomic_add_int(&ifa->refcount, 1); 5489 /* insert it */ 5490 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5491 5492 return (0); 5493 } 5494 5495 /* 5496 * Remove an laddr entry from the local address list (on an assoc) 5497 */ 5498 void 5499 sctp_remove_laddr(struct sctp_laddr *laddr) 5500 { 5501 5502 /* remove from the list */ 5503 LIST_REMOVE(laddr, sctp_nxt_addr); 5504 sctp_free_ifa(laddr->ifa); 5505 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5506 SCTP_DECR_LADDR_COUNT(); 5507 } 5508 5509 /* 5510 * Remove a local address from the TCB local address restricted list 5511 */ 5512 void 5513 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5514 { 5515 struct sctp_inpcb *inp; 5516 struct sctp_laddr *laddr; 5517 5518 /* 5519 * This is called by asconf work. It is assumed that a) The TCB is 5520 * locked and b) The INP is locked. This is true in as much as I can 5521 * trace through the entry asconf code where I did these locks. 5522 * Again, the ASCONF code is a bit different in that it does lock 5523 * the INP during its work often times. This must be since we don't 5524 * want other proc's looking up things while what they are looking 5525 * up is changing :-D 5526 */ 5527 5528 inp = stcb->sctp_ep; 5529 /* if subset bound and don't allow ASCONF's, can't delete last */ 5530 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5531 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5532 if (stcb->sctp_ep->laddr_count < 2) { 5533 /* can't delete last address */ 5534 return; 5535 } 5536 } 5537 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5538 /* remove the address if it exists */ 5539 if (laddr->ifa == NULL) 5540 continue; 5541 if (laddr->ifa == ifa) { 5542 sctp_remove_laddr(laddr); 5543 return; 5544 } 5545 } 5546 5547 /* address not found! */ 5548 return; 5549 } 5550 5551 /* 5552 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5553 */ 5554 /* sysctl */ 5555 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5556 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5557 5558 5559 5560 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5561 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5562 int *sctp_cpuarry = NULL; 5563 void 5564 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5565 { 5566 /* Queue a packet to a processor for the specified core */ 5567 struct sctp_mcore_queue *qent; 5568 struct sctp_mcore_ctrl *wkq; 5569 int need_wake = 0; 5570 5571 if (sctp_mcore_workers == NULL) { 5572 /* Something went way bad during setup */ 5573 sctp_input_with_port(m, off, 0); 5574 return; 5575 } 5576 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5577 (sizeof(struct sctp_mcore_queue)), 5578 SCTP_M_MCORE); 5579 if (qent == NULL) { 5580 /* This is trouble */ 5581 sctp_input_with_port(m, off, 0); 5582 return; 5583 } 5584 qent->vn = curvnet; 5585 qent->m = m; 5586 qent->off = off; 5587 qent->v6 = 0; 5588 wkq = &sctp_mcore_workers[cpu_to_use]; 5589 SCTP_MCORE_QLOCK(wkq); 5590 5591 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5592 if (wkq->running == 0) { 5593 need_wake = 1; 5594 } 5595 SCTP_MCORE_QUNLOCK(wkq); 5596 if (need_wake) { 5597 wakeup(&wkq->running); 5598 } 5599 } 5600 5601 static void 5602 sctp_mcore_thread(void *arg) 5603 { 5604 5605 struct sctp_mcore_ctrl *wkq; 5606 struct sctp_mcore_queue *qent; 5607 5608 wkq = (struct sctp_mcore_ctrl *)arg; 5609 struct mbuf *m; 5610 int off, v6; 5611 5612 /* Wait for first tickle */ 5613 SCTP_MCORE_LOCK(wkq); 5614 wkq->running = 0; 5615 msleep(&wkq->running, 5616 &wkq->core_mtx, 5617 0, "wait for pkt", 0); 5618 SCTP_MCORE_UNLOCK(wkq); 5619 5620 /* Bind to our cpu */ 5621 thread_lock(curthread); 5622 sched_bind(curthread, wkq->cpuid); 5623 thread_unlock(curthread); 5624 5625 /* Now lets start working */ 5626 SCTP_MCORE_LOCK(wkq); 5627 /* Now grab lock and go */ 5628 for (;;) { 5629 SCTP_MCORE_QLOCK(wkq); 5630 skip_sleep: 5631 wkq->running = 1; 5632 qent = TAILQ_FIRST(&wkq->que); 5633 if (qent) { 5634 TAILQ_REMOVE(&wkq->que, qent, next); 5635 SCTP_MCORE_QUNLOCK(wkq); 5636 CURVNET_SET(qent->vn); 5637 m = qent->m; 5638 off = qent->off; 5639 v6 = qent->v6; 5640 SCTP_FREE(qent, SCTP_M_MCORE); 5641 if (v6 == 0) { 5642 sctp_input_with_port(m, off, 0); 5643 } else { 5644 SCTP_PRINTF("V6 not yet supported\n"); 5645 sctp_m_freem(m); 5646 } 5647 CURVNET_RESTORE(); 5648 SCTP_MCORE_QLOCK(wkq); 5649 } 5650 wkq->running = 0; 5651 if (!TAILQ_EMPTY(&wkq->que)) { 5652 goto skip_sleep; 5653 } 5654 SCTP_MCORE_QUNLOCK(wkq); 5655 msleep(&wkq->running, 5656 &wkq->core_mtx, 5657 0, "wait for pkt", 0); 5658 } 5659 } 5660 5661 static void 5662 sctp_startup_mcore_threads(void) 5663 { 5664 int i, cpu; 5665 5666 if (mp_ncpus == 1) 5667 return; 5668 5669 if (sctp_mcore_workers != NULL) { 5670 /* 5671 * Already been here in some previous vnet? 5672 */ 5673 return; 5674 } 5675 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5676 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5677 SCTP_M_MCORE); 5678 if (sctp_mcore_workers == NULL) { 5679 /* TSNH I hope */ 5680 return; 5681 } 5682 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5683 sizeof(struct sctp_mcore_ctrl))); 5684 /* Init the structures */ 5685 for (i = 0; i <= mp_maxid; i++) { 5686 TAILQ_INIT(&sctp_mcore_workers[i].que); 5687 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5688 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5689 sctp_mcore_workers[i].cpuid = i; 5690 } 5691 if (sctp_cpuarry == NULL) { 5692 SCTP_MALLOC(sctp_cpuarry, int *, 5693 (mp_ncpus * sizeof(int)), 5694 SCTP_M_MCORE); 5695 i = 0; 5696 CPU_FOREACH(cpu) { 5697 sctp_cpuarry[i] = cpu; 5698 i++; 5699 } 5700 } 5701 /* Now start them all */ 5702 CPU_FOREACH(cpu) { 5703 (void)kproc_create(sctp_mcore_thread, 5704 (void *)&sctp_mcore_workers[cpu], 5705 &sctp_mcore_workers[cpu].thread_proc, 5706 RFPROC, 5707 SCTP_KTHREAD_PAGES, 5708 SCTP_MCORE_NAME); 5709 5710 } 5711 } 5712 5713 #endif 5714 5715 void 5716 sctp_pcb_init() 5717 { 5718 /* 5719 * SCTP initialization for the PCB structures should be called by 5720 * the sctp_init() funciton. 5721 */ 5722 int i; 5723 struct timeval tv; 5724 5725 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5726 /* error I was called twice */ 5727 return; 5728 } 5729 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5730 5731 #if defined(SCTP_LOCAL_TRACE_BUF) 5732 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5733 #endif 5734 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5735 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5736 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5737 SCTP_M_MCORE); 5738 #endif 5739 (void)SCTP_GETTIME_TIMEVAL(&tv); 5740 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5741 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5742 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5743 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5744 #else 5745 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5746 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5747 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5748 #endif 5749 /* init the empty list of (All) Endpoints */ 5750 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5751 5752 5753 /* init the hash table of endpoints */ 5754 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5755 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5756 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5757 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5758 &SCTP_BASE_INFO(hashasocmark)); 5759 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5760 &SCTP_BASE_INFO(hashmark)); 5761 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5762 &SCTP_BASE_INFO(hashtcpmark)); 5763 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5764 5765 5766 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5767 &SCTP_BASE_INFO(hashvrfmark)); 5768 5769 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5770 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5771 /* init the zones */ 5772 /* 5773 * FIX ME: Should check for NULL returns, but if it does fail we are 5774 * doomed to panic anyways... add later maybe. 5775 */ 5776 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5777 sizeof(struct sctp_inpcb), maxsockets); 5778 5779 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5780 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5781 5782 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5783 sizeof(struct sctp_laddr), 5784 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5785 5786 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5787 sizeof(struct sctp_nets), 5788 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5789 5790 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5791 sizeof(struct sctp_tmit_chunk), 5792 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5793 5794 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5795 sizeof(struct sctp_queued_to_read), 5796 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5797 5798 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5799 sizeof(struct sctp_stream_queue_pending), 5800 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5801 5802 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5803 sizeof(struct sctp_asconf), 5804 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5805 5806 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5807 sizeof(struct sctp_asconf_ack), 5808 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5809 5810 5811 /* Master Lock INIT for info structure */ 5812 SCTP_INP_INFO_LOCK_INIT(); 5813 SCTP_STATLOG_INIT_LOCK(); 5814 5815 SCTP_IPI_COUNT_INIT(); 5816 SCTP_IPI_ADDR_INIT(); 5817 #ifdef SCTP_PACKET_LOGGING 5818 SCTP_IP_PKTLOG_INIT(); 5819 #endif 5820 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5821 5822 SCTP_WQ_ADDR_INIT(); 5823 /* not sure if we need all the counts */ 5824 SCTP_BASE_INFO(ipi_count_ep) = 0; 5825 /* assoc/tcb zone info */ 5826 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5827 /* local addrlist zone info */ 5828 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5829 /* remote addrlist zone info */ 5830 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5831 /* chunk info */ 5832 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5833 5834 /* socket queue zone info */ 5835 SCTP_BASE_INFO(ipi_count_readq) = 0; 5836 5837 /* stream out queue cont */ 5838 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5839 5840 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5841 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5842 5843 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5844 5845 /* Init the TIMEWAIT list */ 5846 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5847 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5848 } 5849 5850 sctp_startup_iterator(); 5851 5852 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5853 sctp_startup_mcore_threads(); 5854 #endif 5855 5856 /* 5857 * INIT the default VRF which for BSD is the only one, other O/S's 5858 * may have more. But initially they must start with one and then 5859 * add the VRF's as addresses are added. 5860 */ 5861 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5862 } 5863 5864 /* 5865 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5866 */ 5867 void 5868 sctp_pcb_finish(void) 5869 { 5870 struct sctp_vrflist *vrf_bucket; 5871 struct sctp_vrf *vrf, *nvrf; 5872 struct sctp_ifn *ifn, *nifn; 5873 struct sctp_ifa *ifa, *nifa; 5874 struct sctpvtaghead *chain; 5875 struct sctp_tagblock *twait_block, *prev_twait_block; 5876 struct sctp_laddr *wi, *nwi; 5877 int i; 5878 5879 /* 5880 * Free BSD the it thread never exits but we do clean up. The only 5881 * way freebsd reaches here if we have VRF's but we still add the 5882 * ifdef to make it compile on old versions. 5883 */ 5884 { 5885 struct sctp_iterator *it, *nit; 5886 5887 SCTP_IPI_ITERATOR_WQ_LOCK(); 5888 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5889 if (it->vn != curvnet) { 5890 continue; 5891 } 5892 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5893 if (it->function_atend != NULL) { 5894 (*it->function_atend) (it->pointer, it->val); 5895 } 5896 SCTP_FREE(it, SCTP_M_ITER); 5897 } 5898 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5899 SCTP_ITERATOR_LOCK(); 5900 if ((sctp_it_ctl.cur_it) && 5901 (sctp_it_ctl.cur_it->vn == curvnet)) { 5902 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5903 } 5904 SCTP_ITERATOR_UNLOCK(); 5905 } 5906 5907 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5908 SCTP_WQ_ADDR_LOCK(); 5909 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5910 LIST_REMOVE(wi, sctp_nxt_addr); 5911 SCTP_DECR_LADDR_COUNT(); 5912 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5913 } 5914 SCTP_WQ_ADDR_UNLOCK(); 5915 5916 /* 5917 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5918 * destroyed first). 5919 */ 5920 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5921 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5922 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5923 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5924 /* free the ifa */ 5925 LIST_REMOVE(ifa, next_bucket); 5926 LIST_REMOVE(ifa, next_ifa); 5927 SCTP_FREE(ifa, SCTP_M_IFA); 5928 } 5929 /* free the ifn */ 5930 LIST_REMOVE(ifn, next_bucket); 5931 LIST_REMOVE(ifn, next_ifn); 5932 SCTP_FREE(ifn, SCTP_M_IFN); 5933 } 5934 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5935 /* free the vrf */ 5936 LIST_REMOVE(vrf, next_vrf); 5937 SCTP_FREE(vrf, SCTP_M_VRF); 5938 } 5939 /* free the vrf hashes */ 5940 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5941 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5942 5943 /* 5944 * free the TIMEWAIT list elements malloc'd in the function 5945 * sctp_add_vtag_to_timewait()... 5946 */ 5947 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5948 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5949 if (!LIST_EMPTY(chain)) { 5950 prev_twait_block = NULL; 5951 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5952 if (prev_twait_block) { 5953 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5954 } 5955 prev_twait_block = twait_block; 5956 } 5957 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5958 } 5959 } 5960 5961 /* free the locks and mutexes */ 5962 #ifdef SCTP_PACKET_LOGGING 5963 SCTP_IP_PKTLOG_DESTROY(); 5964 #endif 5965 SCTP_IPI_ADDR_DESTROY(); 5966 SCTP_STATLOG_DESTROY(); 5967 SCTP_INP_INFO_LOCK_DESTROY(); 5968 5969 SCTP_WQ_ADDR_DESTROY(); 5970 5971 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5972 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5973 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5974 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5975 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5976 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5977 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5978 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5979 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5980 /* Get rid of other stuff to */ 5981 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5982 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5983 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5984 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5985 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5986 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5987 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5988 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5989 #endif 5990 } 5991 5992 5993 int 5994 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5995 int offset, int limit, 5996 struct sockaddr *src, struct sockaddr *dst, 5997 struct sockaddr *altsa) 5998 { 5999 /* 6000 * grub through the INIT pulling addresses and loading them to the 6001 * nets structure in the asoc. The from address in the mbuf should 6002 * also be loaded (if it is not already). This routine can be called 6003 * with either INIT or INIT-ACK's as long as the m points to the IP 6004 * packet and the offset points to the beginning of the parameters. 6005 */ 6006 struct sctp_inpcb *inp; 6007 struct sctp_nets *net, *nnet, *net_tmp; 6008 struct sctp_paramhdr *phdr, parm_buf; 6009 struct sctp_tcb *stcb_tmp; 6010 uint16_t ptype, plen; 6011 struct sockaddr *sa; 6012 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6013 struct sctp_auth_random *p_random = NULL; 6014 uint16_t random_len = 0; 6015 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6016 struct sctp_auth_hmac_algo *hmacs = NULL; 6017 uint16_t hmacs_len = 0; 6018 uint8_t saw_asconf = 0; 6019 uint8_t saw_asconf_ack = 0; 6020 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6021 struct sctp_auth_chunk_list *chunks = NULL; 6022 uint16_t num_chunks = 0; 6023 sctp_key_t *new_key; 6024 uint32_t keylen; 6025 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6026 uint8_t ecn_allowed; 6027 6028 #ifdef INET 6029 struct sockaddr_in sin; 6030 6031 #endif 6032 #ifdef INET6 6033 struct sockaddr_in6 sin6; 6034 6035 #endif 6036 6037 /* First get the destination address setup too. */ 6038 #ifdef INET 6039 memset(&sin, 0, sizeof(sin)); 6040 sin.sin_family = AF_INET; 6041 sin.sin_len = sizeof(sin); 6042 sin.sin_port = stcb->rport; 6043 #endif 6044 #ifdef INET6 6045 memset(&sin6, 0, sizeof(sin6)); 6046 sin6.sin6_family = AF_INET6; 6047 sin6.sin6_len = sizeof(struct sockaddr_in6); 6048 sin6.sin6_port = stcb->rport; 6049 #endif 6050 if (altsa) { 6051 sa = altsa; 6052 } else { 6053 sa = src; 6054 } 6055 /* Turn off ECN until we get through all params */ 6056 ecn_allowed = 0; 6057 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6058 /* mark all addresses that we have currently on the list */ 6059 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6060 } 6061 /* does the source address already exist? if so skip it */ 6062 inp = stcb->sctp_ep; 6063 atomic_add_int(&stcb->asoc.refcnt, 1); 6064 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6065 atomic_add_int(&stcb->asoc.refcnt, -1); 6066 6067 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6068 /* we must add the source address */ 6069 /* no scope set here since we have a tcb already. */ 6070 switch (sa->sa_family) { 6071 #ifdef INET 6072 case AF_INET: 6073 if (stcb->asoc.ipv4_addr_legal) { 6074 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6075 return (-1); 6076 } 6077 } 6078 break; 6079 #endif 6080 #ifdef INET6 6081 case AF_INET6: 6082 if (stcb->asoc.ipv6_addr_legal) { 6083 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6084 return (-2); 6085 } 6086 } 6087 break; 6088 #endif 6089 default: 6090 break; 6091 } 6092 } else { 6093 if (net_tmp != NULL && stcb_tmp == stcb) { 6094 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6095 } else if (stcb_tmp != stcb) { 6096 /* It belongs to another association? */ 6097 if (stcb_tmp) 6098 SCTP_TCB_UNLOCK(stcb_tmp); 6099 return (-3); 6100 } 6101 } 6102 if (stcb->asoc.state == 0) { 6103 /* the assoc was freed? */ 6104 return (-4); 6105 } 6106 /* 6107 * peer must explicitly turn this on. This may have been initialized 6108 * to be "on" in order to allow local addr changes while INIT's are 6109 * in flight. 6110 */ 6111 stcb->asoc.peer_supports_asconf = 0; 6112 /* now we must go through each of the params. */ 6113 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6114 while (phdr) { 6115 ptype = ntohs(phdr->param_type); 6116 plen = ntohs(phdr->param_length); 6117 /* 6118 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6119 * (uint32_t)ptype, (int)plen); 6120 */ 6121 if (offset + plen > limit) { 6122 break; 6123 } 6124 if (plen == 0) { 6125 break; 6126 } 6127 #ifdef INET 6128 if (ptype == SCTP_IPV4_ADDRESS) { 6129 if (stcb->asoc.ipv4_addr_legal) { 6130 struct sctp_ipv4addr_param *p4, p4_buf; 6131 6132 /* ok get the v4 address and check/add */ 6133 phdr = sctp_get_next_param(m, offset, 6134 (struct sctp_paramhdr *)&p4_buf, 6135 sizeof(p4_buf)); 6136 if (plen != sizeof(struct sctp_ipv4addr_param) || 6137 phdr == NULL) { 6138 return (-5); 6139 } 6140 p4 = (struct sctp_ipv4addr_param *)phdr; 6141 sin.sin_addr.s_addr = p4->addr; 6142 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6143 /* Skip multi-cast addresses */ 6144 goto next_param; 6145 } 6146 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6147 (sin.sin_addr.s_addr == INADDR_ANY)) { 6148 goto next_param; 6149 } 6150 sa = (struct sockaddr *)&sin; 6151 inp = stcb->sctp_ep; 6152 atomic_add_int(&stcb->asoc.refcnt, 1); 6153 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6154 dst, stcb); 6155 atomic_add_int(&stcb->asoc.refcnt, -1); 6156 6157 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6158 inp == NULL) { 6159 /* we must add the source address */ 6160 /* 6161 * no scope set since we have a tcb 6162 * already 6163 */ 6164 6165 /* 6166 * we must validate the state again 6167 * here 6168 */ 6169 add_it_now: 6170 if (stcb->asoc.state == 0) { 6171 /* the assoc was freed? */ 6172 return (-7); 6173 } 6174 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6175 return (-8); 6176 } 6177 } else if (stcb_tmp == stcb) { 6178 if (stcb->asoc.state == 0) { 6179 /* the assoc was freed? */ 6180 return (-10); 6181 } 6182 if (net != NULL) { 6183 /* clear flag */ 6184 net->dest_state &= 6185 ~SCTP_ADDR_NOT_IN_ASSOC; 6186 } 6187 } else { 6188 /* 6189 * strange, address is in another 6190 * assoc? straighten out locks. 6191 */ 6192 if (stcb_tmp) { 6193 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6194 /* 6195 * in setup state we 6196 * abort this guy 6197 */ 6198 sctp_abort_an_association(stcb_tmp->sctp_ep, 6199 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6200 goto add_it_now; 6201 } 6202 SCTP_TCB_UNLOCK(stcb_tmp); 6203 } 6204 if (stcb->asoc.state == 0) { 6205 /* the assoc was freed? */ 6206 return (-12); 6207 } 6208 return (-13); 6209 } 6210 } 6211 } else 6212 #endif 6213 #ifdef INET6 6214 if (ptype == SCTP_IPV6_ADDRESS) { 6215 if (stcb->asoc.ipv6_addr_legal) { 6216 /* ok get the v6 address and check/add */ 6217 struct sctp_ipv6addr_param *p6, p6_buf; 6218 6219 phdr = sctp_get_next_param(m, offset, 6220 (struct sctp_paramhdr *)&p6_buf, 6221 sizeof(p6_buf)); 6222 if (plen != sizeof(struct sctp_ipv6addr_param) || 6223 phdr == NULL) { 6224 return (-14); 6225 } 6226 p6 = (struct sctp_ipv6addr_param *)phdr; 6227 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6228 sizeof(p6->addr)); 6229 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6230 /* Skip multi-cast addresses */ 6231 goto next_param; 6232 } 6233 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6234 /* 6235 * Link local make no sense without 6236 * scope 6237 */ 6238 goto next_param; 6239 } 6240 sa = (struct sockaddr *)&sin6; 6241 inp = stcb->sctp_ep; 6242 atomic_add_int(&stcb->asoc.refcnt, 1); 6243 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6244 dst, stcb); 6245 atomic_add_int(&stcb->asoc.refcnt, -1); 6246 if (stcb_tmp == NULL && 6247 (inp == stcb->sctp_ep || inp == NULL)) { 6248 /* 6249 * we must validate the state again 6250 * here 6251 */ 6252 add_it_now6: 6253 if (stcb->asoc.state == 0) { 6254 /* the assoc was freed? */ 6255 return (-16); 6256 } 6257 /* 6258 * we must add the address, no scope 6259 * set 6260 */ 6261 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6262 return (-17); 6263 } 6264 } else if (stcb_tmp == stcb) { 6265 /* 6266 * we must validate the state again 6267 * here 6268 */ 6269 if (stcb->asoc.state == 0) { 6270 /* the assoc was freed? */ 6271 return (-19); 6272 } 6273 if (net != NULL) { 6274 /* clear flag */ 6275 net->dest_state &= 6276 ~SCTP_ADDR_NOT_IN_ASSOC; 6277 } 6278 } else { 6279 /* 6280 * strange, address is in another 6281 * assoc? straighten out locks. 6282 */ 6283 if (stcb_tmp) 6284 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6285 /* 6286 * in setup state we 6287 * abort this guy 6288 */ 6289 sctp_abort_an_association(stcb_tmp->sctp_ep, 6290 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6291 goto add_it_now6; 6292 } 6293 SCTP_TCB_UNLOCK(stcb_tmp); 6294 6295 if (stcb->asoc.state == 0) { 6296 /* the assoc was freed? */ 6297 return (-21); 6298 } 6299 return (-22); 6300 } 6301 } 6302 } else 6303 #endif 6304 if (ptype == SCTP_ECN_CAPABLE) { 6305 ecn_allowed = 1; 6306 } else if (ptype == SCTP_ULP_ADAPTATION) { 6307 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6308 struct sctp_adaptation_layer_indication ai, 6309 *aip; 6310 6311 phdr = sctp_get_next_param(m, offset, 6312 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6313 aip = (struct sctp_adaptation_layer_indication *)phdr; 6314 if (aip) { 6315 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6316 stcb->asoc.adaptation_needed = 1; 6317 } 6318 } 6319 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6320 struct sctp_asconf_addr_param lstore, *fee; 6321 int lptype; 6322 struct sockaddr *lsa = NULL; 6323 6324 #ifdef INET 6325 struct sctp_asconf_addrv4_param *fii; 6326 6327 #endif 6328 6329 stcb->asoc.peer_supports_asconf = 1; 6330 if (plen > sizeof(lstore)) { 6331 return (-23); 6332 } 6333 phdr = sctp_get_next_param(m, offset, 6334 (struct sctp_paramhdr *)&lstore, 6335 min(plen, sizeof(lstore))); 6336 if (phdr == NULL) { 6337 return (-24); 6338 } 6339 fee = (struct sctp_asconf_addr_param *)phdr; 6340 lptype = ntohs(fee->addrp.ph.param_type); 6341 switch (lptype) { 6342 #ifdef INET 6343 case SCTP_IPV4_ADDRESS: 6344 if (plen != 6345 sizeof(struct sctp_asconf_addrv4_param)) { 6346 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6347 (int)sizeof(struct sctp_asconf_addrv4_param), 6348 plen); 6349 } else { 6350 fii = (struct sctp_asconf_addrv4_param *)fee; 6351 sin.sin_addr.s_addr = fii->addrp.addr; 6352 lsa = (struct sockaddr *)&sin; 6353 } 6354 break; 6355 #endif 6356 #ifdef INET6 6357 case SCTP_IPV6_ADDRESS: 6358 if (plen != 6359 sizeof(struct sctp_asconf_addr_param)) { 6360 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6361 (int)sizeof(struct sctp_asconf_addr_param), 6362 plen); 6363 } else { 6364 memcpy(sin6.sin6_addr.s6_addr, 6365 fee->addrp.addr, 6366 sizeof(fee->addrp.addr)); 6367 lsa = (struct sockaddr *)&sin6; 6368 } 6369 break; 6370 #endif 6371 default: 6372 break; 6373 } 6374 if (lsa) { 6375 (void)sctp_set_primary_addr(stcb, sa, NULL); 6376 } 6377 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6378 stcb->asoc.peer_supports_nat = 1; 6379 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6380 /* Peer supports pr-sctp */ 6381 stcb->asoc.peer_supports_prsctp = 1; 6382 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6383 /* A supported extension chunk */ 6384 struct sctp_supported_chunk_types_param *pr_supported; 6385 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6386 int num_ent, i; 6387 6388 phdr = sctp_get_next_param(m, offset, 6389 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6390 if (phdr == NULL) { 6391 return (-25); 6392 } 6393 stcb->asoc.peer_supports_asconf = 0; 6394 stcb->asoc.peer_supports_prsctp = 0; 6395 stcb->asoc.peer_supports_pktdrop = 0; 6396 stcb->asoc.peer_supports_strreset = 0; 6397 stcb->asoc.peer_supports_nr_sack = 0; 6398 stcb->asoc.peer_supports_auth = 0; 6399 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6400 num_ent = plen - sizeof(struct sctp_paramhdr); 6401 for (i = 0; i < num_ent; i++) { 6402 switch (pr_supported->chunk_types[i]) { 6403 case SCTP_ASCONF: 6404 case SCTP_ASCONF_ACK: 6405 stcb->asoc.peer_supports_asconf = 1; 6406 break; 6407 case SCTP_FORWARD_CUM_TSN: 6408 stcb->asoc.peer_supports_prsctp = 1; 6409 break; 6410 case SCTP_PACKET_DROPPED: 6411 stcb->asoc.peer_supports_pktdrop = 1; 6412 break; 6413 case SCTP_NR_SELECTIVE_ACK: 6414 stcb->asoc.peer_supports_nr_sack = 1; 6415 break; 6416 case SCTP_STREAM_RESET: 6417 stcb->asoc.peer_supports_strreset = 1; 6418 break; 6419 case SCTP_AUTHENTICATION: 6420 stcb->asoc.peer_supports_auth = 1; 6421 break; 6422 default: 6423 /* one I have not learned yet */ 6424 break; 6425 6426 } 6427 } 6428 } else if (ptype == SCTP_RANDOM) { 6429 if (plen > sizeof(random_store)) 6430 break; 6431 if (got_random) { 6432 /* already processed a RANDOM */ 6433 goto next_param; 6434 } 6435 phdr = sctp_get_next_param(m, offset, 6436 (struct sctp_paramhdr *)random_store, 6437 min(sizeof(random_store), plen)); 6438 if (phdr == NULL) 6439 return (-26); 6440 p_random = (struct sctp_auth_random *)phdr; 6441 random_len = plen - sizeof(*p_random); 6442 /* enforce the random length */ 6443 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6444 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6445 return (-27); 6446 } 6447 got_random = 1; 6448 } else if (ptype == SCTP_HMAC_LIST) { 6449 int num_hmacs; 6450 int i; 6451 6452 if (plen > sizeof(hmacs_store)) 6453 break; 6454 if (got_hmacs) { 6455 /* already processed a HMAC list */ 6456 goto next_param; 6457 } 6458 phdr = sctp_get_next_param(m, offset, 6459 (struct sctp_paramhdr *)hmacs_store, 6460 min(plen, sizeof(hmacs_store))); 6461 if (phdr == NULL) 6462 return (-28); 6463 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6464 hmacs_len = plen - sizeof(*hmacs); 6465 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6466 /* validate the hmac list */ 6467 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6468 return (-29); 6469 } 6470 if (stcb->asoc.peer_hmacs != NULL) 6471 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6472 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6473 if (stcb->asoc.peer_hmacs != NULL) { 6474 for (i = 0; i < num_hmacs; i++) { 6475 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6476 ntohs(hmacs->hmac_ids[i])); 6477 } 6478 } 6479 got_hmacs = 1; 6480 } else if (ptype == SCTP_CHUNK_LIST) { 6481 int i; 6482 6483 if (plen > sizeof(chunks_store)) 6484 break; 6485 if (got_chklist) { 6486 /* already processed a Chunks list */ 6487 goto next_param; 6488 } 6489 phdr = sctp_get_next_param(m, offset, 6490 (struct sctp_paramhdr *)chunks_store, 6491 min(plen, sizeof(chunks_store))); 6492 if (phdr == NULL) 6493 return (-30); 6494 chunks = (struct sctp_auth_chunk_list *)phdr; 6495 num_chunks = plen - sizeof(*chunks); 6496 if (stcb->asoc.peer_auth_chunks != NULL) 6497 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6498 else 6499 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6500 for (i = 0; i < num_chunks; i++) { 6501 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6502 stcb->asoc.peer_auth_chunks); 6503 /* record asconf/asconf-ack if listed */ 6504 if (chunks->chunk_types[i] == SCTP_ASCONF) 6505 saw_asconf = 1; 6506 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6507 saw_asconf_ack = 1; 6508 6509 } 6510 got_chklist = 1; 6511 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6512 (ptype == SCTP_STATE_COOKIE) || 6513 (ptype == SCTP_UNRECOG_PARAM) || 6514 (ptype == SCTP_COOKIE_PRESERVE) || 6515 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6516 (ptype == SCTP_ADD_IP_ADDRESS) || 6517 (ptype == SCTP_DEL_IP_ADDRESS) || 6518 (ptype == SCTP_ERROR_CAUSE_IND) || 6519 (ptype == SCTP_SUCCESS_REPORT)) { 6520 /* don't care */ ; 6521 } else { 6522 if ((ptype & 0x8000) == 0x0000) { 6523 /* 6524 * must stop processing the rest of the 6525 * param's. Any report bits were handled 6526 * with the call to 6527 * sctp_arethere_unrecognized_parameters() 6528 * when the INIT or INIT-ACK was first seen. 6529 */ 6530 break; 6531 } 6532 } 6533 6534 next_param: 6535 offset += SCTP_SIZE32(plen); 6536 if (offset >= limit) { 6537 break; 6538 } 6539 phdr = sctp_get_next_param(m, offset, &parm_buf, 6540 sizeof(parm_buf)); 6541 } 6542 /* Now check to see if we need to purge any addresses */ 6543 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6544 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6545 SCTP_ADDR_NOT_IN_ASSOC) { 6546 /* This address has been removed from the asoc */ 6547 /* remove and free it */ 6548 stcb->asoc.numnets--; 6549 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6550 sctp_free_remote_addr(net); 6551 if (net == stcb->asoc.primary_destination) { 6552 stcb->asoc.primary_destination = NULL; 6553 sctp_select_primary_destination(stcb); 6554 } 6555 } 6556 } 6557 if (ecn_allowed == 0) { 6558 stcb->asoc.ecn_allowed = 0; 6559 } 6560 /* validate authentication required parameters */ 6561 if (got_random && got_hmacs) { 6562 stcb->asoc.peer_supports_auth = 1; 6563 } else { 6564 stcb->asoc.peer_supports_auth = 0; 6565 } 6566 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6567 /* peer does not support auth but sent a chunks list? */ 6568 return (-31); 6569 } 6570 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6571 !stcb->asoc.peer_supports_auth) { 6572 /* peer supports asconf but not auth? */ 6573 return (-32); 6574 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6575 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6576 return (-33); 6577 } 6578 /* concatenate the full random key */ 6579 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6580 if (chunks != NULL) { 6581 keylen += sizeof(*chunks) + num_chunks; 6582 } 6583 new_key = sctp_alloc_key(keylen); 6584 if (new_key != NULL) { 6585 /* copy in the RANDOM */ 6586 if (p_random != NULL) { 6587 keylen = sizeof(*p_random) + random_len; 6588 bcopy(p_random, new_key->key, keylen); 6589 } 6590 /* append in the AUTH chunks */ 6591 if (chunks != NULL) { 6592 bcopy(chunks, new_key->key + keylen, 6593 sizeof(*chunks) + num_chunks); 6594 keylen += sizeof(*chunks) + num_chunks; 6595 } 6596 /* append in the HMACs */ 6597 if (hmacs != NULL) { 6598 bcopy(hmacs, new_key->key + keylen, 6599 sizeof(*hmacs) + hmacs_len); 6600 } 6601 } else { 6602 /* failed to get memory for the key */ 6603 return (-34); 6604 } 6605 if (stcb->asoc.authinfo.peer_random != NULL) 6606 sctp_free_key(stcb->asoc.authinfo.peer_random); 6607 stcb->asoc.authinfo.peer_random = new_key; 6608 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6609 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6610 6611 return (0); 6612 } 6613 6614 int 6615 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6616 struct sctp_nets *net) 6617 { 6618 /* make sure the requested primary address exists in the assoc */ 6619 if (net == NULL && sa) 6620 net = sctp_findnet(stcb, sa); 6621 6622 if (net == NULL) { 6623 /* didn't find the requested primary address! */ 6624 return (-1); 6625 } else { 6626 /* set the primary address */ 6627 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6628 /* Must be confirmed, so queue to set */ 6629 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6630 return (0); 6631 } 6632 stcb->asoc.primary_destination = net; 6633 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6634 sctp_free_remote_addr(stcb->asoc.alternate); 6635 stcb->asoc.alternate = NULL; 6636 } 6637 net = TAILQ_FIRST(&stcb->asoc.nets); 6638 if (net != stcb->asoc.primary_destination) { 6639 /* 6640 * first one on the list is NOT the primary 6641 * sctp_cmpaddr() is much more efficient if the 6642 * primary is the first on the list, make it so. 6643 */ 6644 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6645 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6646 } 6647 return (0); 6648 } 6649 } 6650 6651 int 6652 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6653 { 6654 /* 6655 * This function serves two purposes. It will see if a TAG can be 6656 * re-used and return 1 for yes it is ok and 0 for don't use that 6657 * tag. A secondary function it will do is purge out old tags that 6658 * can be removed. 6659 */ 6660 struct sctpvtaghead *chain; 6661 struct sctp_tagblock *twait_block; 6662 struct sctpasochead *head; 6663 struct sctp_tcb *stcb; 6664 int i; 6665 6666 SCTP_INP_INFO_RLOCK(); 6667 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6668 SCTP_BASE_INFO(hashasocmark))]; 6669 if (head == NULL) { 6670 /* invalid vtag */ 6671 goto skip_vtag_check; 6672 } 6673 LIST_FOREACH(stcb, head, sctp_asocs) { 6674 /* 6675 * We choose not to lock anything here. TCB's can't be 6676 * removed since we have the read lock, so they can't be 6677 * freed on us, same thing for the INP. I may be wrong with 6678 * this assumption, but we will go with it for now :-) 6679 */ 6680 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6681 continue; 6682 } 6683 if (stcb->asoc.my_vtag == tag) { 6684 /* candidate */ 6685 if (stcb->rport != rport) { 6686 continue; 6687 } 6688 if (stcb->sctp_ep->sctp_lport != lport) { 6689 continue; 6690 } 6691 /* Its a used tag set */ 6692 SCTP_INP_INFO_RUNLOCK(); 6693 return (0); 6694 } 6695 } 6696 skip_vtag_check: 6697 6698 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6699 /* Now what about timed wait ? */ 6700 if (!LIST_EMPTY(chain)) { 6701 /* 6702 * Block(s) are present, lets see if we have this tag in the 6703 * list 6704 */ 6705 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6706 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6707 if (twait_block->vtag_block[i].v_tag == 0) { 6708 /* not used */ 6709 continue; 6710 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6711 now->tv_sec) { 6712 /* Audit expires this guy */ 6713 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6714 twait_block->vtag_block[i].v_tag = 0; 6715 twait_block->vtag_block[i].lport = 0; 6716 twait_block->vtag_block[i].rport = 0; 6717 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6718 (twait_block->vtag_block[i].lport == lport) && 6719 (twait_block->vtag_block[i].rport == rport)) { 6720 /* Bad tag, sorry :< */ 6721 SCTP_INP_INFO_RUNLOCK(); 6722 return (0); 6723 } 6724 } 6725 } 6726 } 6727 SCTP_INP_INFO_RUNLOCK(); 6728 return (1); 6729 } 6730 6731 static void 6732 sctp_drain_mbufs(struct sctp_tcb *stcb) 6733 { 6734 /* 6735 * We must hunt this association for MBUF's past the cumack (i.e. 6736 * out of order data that we can renege on). 6737 */ 6738 struct sctp_association *asoc; 6739 struct sctp_tmit_chunk *chk, *nchk; 6740 uint32_t cumulative_tsn_p1; 6741 struct sctp_queued_to_read *ctl, *nctl; 6742 int cnt, strmat; 6743 uint32_t gap, i; 6744 int fnd = 0; 6745 6746 /* We look for anything larger than the cum-ack + 1 */ 6747 6748 asoc = &stcb->asoc; 6749 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6750 /* none we can reneg on. */ 6751 return; 6752 } 6753 SCTP_STAT_INCR(sctps_protocol_drains_done); 6754 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6755 cnt = 0; 6756 /* First look in the re-assembly queue */ 6757 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6758 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6759 /* Yep it is above cum-ack */ 6760 cnt++; 6761 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6762 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6763 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6764 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6765 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6766 if (chk->data) { 6767 sctp_m_freem(chk->data); 6768 chk->data = NULL; 6769 } 6770 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6771 } 6772 } 6773 /* Ok that was fun, now we will drain all the inbound streams? */ 6774 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6775 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6776 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6777 /* Yep it is above cum-ack */ 6778 cnt++; 6779 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6780 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6781 sctp_ucount_decr(asoc->cnt_on_all_streams); 6782 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6783 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6784 if (ctl->data) { 6785 sctp_m_freem(ctl->data); 6786 ctl->data = NULL; 6787 } 6788 sctp_free_remote_addr(ctl->whoFrom); 6789 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6790 SCTP_DECR_READQ_COUNT(); 6791 } 6792 } 6793 } 6794 if (cnt) { 6795 /* We must back down to see what the new highest is */ 6796 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6797 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6798 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6799 asoc->highest_tsn_inside_map = i; 6800 fnd = 1; 6801 break; 6802 } 6803 } 6804 if (!fnd) { 6805 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6806 } 6807 /* 6808 * Question, should we go through the delivery queue? The 6809 * only reason things are on here is the app not reading OR 6810 * a p-d-api up. An attacker COULD send enough in to 6811 * initiate the PD-API and then send a bunch of stuff to 6812 * other streams... these would wind up on the delivery 6813 * queue.. and then we would not get to them. But in order 6814 * to do this I then have to back-track and un-deliver 6815 * sequence numbers in streams.. el-yucko. I think for now 6816 * we will NOT look at the delivery queue and leave it to be 6817 * something to consider later. An alternative would be to 6818 * abort the P-D-API with a notification and then deliver 6819 * the data.... Or another method might be to keep track of 6820 * how many times the situation occurs and if we see a 6821 * possible attack underway just abort the association. 6822 */ 6823 #ifdef SCTP_DEBUG 6824 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6825 #endif 6826 /* 6827 * Now do we need to find a new 6828 * asoc->highest_tsn_inside_map? 6829 */ 6830 asoc->last_revoke_count = cnt; 6831 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6832 /* sa_ignore NO_NULL_CHK */ 6833 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6834 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6835 } 6836 /* 6837 * Another issue, in un-setting the TSN's in the mapping array we 6838 * DID NOT adjust the highest_tsn marker. This will cause one of 6839 * two things to occur. It may cause us to do extra work in checking 6840 * for our mapping array movement. More importantly it may cause us 6841 * to SACK every datagram. This may not be a bad thing though since 6842 * we will recover once we get our cum-ack above and all this stuff 6843 * we dumped recovered. 6844 */ 6845 } 6846 6847 void 6848 sctp_drain() 6849 { 6850 /* 6851 * We must walk the PCB lists for ALL associations here. The system 6852 * is LOW on MBUF's and needs help. This is where reneging will 6853 * occur. We really hope this does NOT happen! 6854 */ 6855 VNET_ITERATOR_DECL(vnet_iter); 6856 VNET_LIST_RLOCK_NOSLEEP(); 6857 VNET_FOREACH(vnet_iter) { 6858 CURVNET_SET(vnet_iter); 6859 struct sctp_inpcb *inp; 6860 struct sctp_tcb *stcb; 6861 6862 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6863 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6864 #ifdef VIMAGE 6865 continue; 6866 #else 6867 return; 6868 #endif 6869 } 6870 SCTP_INP_INFO_RLOCK(); 6871 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6872 /* For each endpoint */ 6873 SCTP_INP_RLOCK(inp); 6874 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6875 /* For each association */ 6876 SCTP_TCB_LOCK(stcb); 6877 sctp_drain_mbufs(stcb); 6878 SCTP_TCB_UNLOCK(stcb); 6879 } 6880 SCTP_INP_RUNLOCK(inp); 6881 } 6882 SCTP_INP_INFO_RUNLOCK(); 6883 CURVNET_RESTORE(); 6884 } 6885 VNET_LIST_RUNLOCK_NOSLEEP(); 6886 } 6887 6888 /* 6889 * start a new iterator 6890 * iterates through all endpoints and associations based on the pcb_state 6891 * flags and asoc_state. "af" (mandatory) is executed for all matching 6892 * assocs and "ef" (optional) is executed when the iterator completes. 6893 * "inpf" (optional) is executed for each new endpoint as it is being 6894 * iterated through. inpe (optional) is called when the inp completes 6895 * its way through all the stcbs. 6896 */ 6897 int 6898 sctp_initiate_iterator(inp_func inpf, 6899 asoc_func af, 6900 inp_func inpe, 6901 uint32_t pcb_state, 6902 uint32_t pcb_features, 6903 uint32_t asoc_state, 6904 void *argp, 6905 uint32_t argi, 6906 end_func ef, 6907 struct sctp_inpcb *s_inp, 6908 uint8_t chunk_output_off) 6909 { 6910 struct sctp_iterator *it = NULL; 6911 6912 if (af == NULL) { 6913 return (-1); 6914 } 6915 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6916 SCTP_M_ITER); 6917 if (it == NULL) { 6918 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6919 return (ENOMEM); 6920 } 6921 memset(it, 0, sizeof(*it)); 6922 it->function_assoc = af; 6923 it->function_inp = inpf; 6924 if (inpf) 6925 it->done_current_ep = 0; 6926 else 6927 it->done_current_ep = 1; 6928 it->function_atend = ef; 6929 it->pointer = argp; 6930 it->val = argi; 6931 it->pcb_flags = pcb_state; 6932 it->pcb_features = pcb_features; 6933 it->asoc_state = asoc_state; 6934 it->function_inp_end = inpe; 6935 it->no_chunk_output = chunk_output_off; 6936 it->vn = curvnet; 6937 if (s_inp) { 6938 /* Assume lock is held here */ 6939 it->inp = s_inp; 6940 SCTP_INP_INCR_REF(it->inp); 6941 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6942 } else { 6943 SCTP_INP_INFO_RLOCK(); 6944 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6945 if (it->inp) { 6946 SCTP_INP_INCR_REF(it->inp); 6947 } 6948 SCTP_INP_INFO_RUNLOCK(); 6949 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6950 6951 } 6952 SCTP_IPI_ITERATOR_WQ_LOCK(); 6953 6954 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6955 if (sctp_it_ctl.iterator_running == 0) { 6956 sctp_wakeup_iterator(); 6957 } 6958 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6959 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6960 return (0); 6961 } 6962