1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/sctp_dtrace_define.h> 49 #include <netinet/udp.h> 50 #ifdef INET6 51 #include <netinet6/ip6_var.h> 52 #endif 53 #include <sys/sched.h> 54 #include <sys/smp.h> 55 #include <sys/unistd.h> 56 57 58 VNET_DEFINE(struct sctp_base_info, system_base_info); 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 79 #endif 80 81 void 82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 83 { 84 /* 85 * We really don't need to lock this, but I will just because it 86 * does not hurt. 87 */ 88 SCTP_INP_INFO_RLOCK(); 89 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 90 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 91 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 92 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 93 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 94 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 95 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 96 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 97 SCTP_INP_INFO_RUNLOCK(); 98 } 99 100 /*- 101 * Addresses are added to VRF's (Virtual Router's). For BSD we 102 * have only the default VRF 0. We maintain a hash list of 103 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 104 * these has a list of addresses. When we add a new address 105 * to a VRF we lookup the ifn/ifn_index, if the ifn does 106 * not exist we create it and add it to the list of IFN's 107 * within the VRF. Once we have the sctp_ifn, we add the 108 * address to the list. So we look something like: 109 * 110 * hash-vrf-table 111 * vrf-> ifn-> ifn -> ifn 112 * vrf | 113 * ... +--ifa-> ifa -> ifa 114 * vrf 115 * 116 * We keep these separate lists since the SCTP subsystem will 117 * point to these from its source address selection nets structure. 118 * When an address is deleted it does not happen right away on 119 * the SCTP side, it gets scheduled. What we do when a 120 * delete happens is immediately remove the address from 121 * the master list and decrement the refcount. As our 122 * addip iterator works through and frees the src address 123 * selection pointing to the sctp_ifa, eventually the refcount 124 * will reach 0 and we will delete it. Note that it is assumed 125 * that any locking on system level ifn/ifa is done at the 126 * caller of these functions and these routines will only 127 * lock the SCTP structures as they add or delete things. 128 * 129 * Other notes on VRF concepts. 130 * - An endpoint can be in multiple VRF's 131 * - An association lives within a VRF and only one VRF. 132 * - Any incoming packet we can deduce the VRF for by 133 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 134 * - Any downward send call or connect call must supply the 135 * VRF via ancillary data or via some sort of set default 136 * VRF socket option call (again for BSD no brainer since 137 * the VRF is always 0). 138 * - An endpoint may add multiple VRF's to it. 139 * - Listening sockets can accept associations in any 140 * of the VRF's they are in but the assoc will end up 141 * in only one VRF (gotten from the packet or connect/send). 142 * 143 */ 144 145 struct sctp_vrf * 146 sctp_allocate_vrf(int vrf_id) 147 { 148 struct sctp_vrf *vrf = NULL; 149 struct sctp_vrflist *bucket; 150 151 /* First allocate the VRF structure */ 152 vrf = sctp_find_vrf(vrf_id); 153 if (vrf) { 154 /* Already allocated */ 155 return (vrf); 156 } 157 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 158 SCTP_M_VRF); 159 if (vrf == NULL) { 160 /* No memory */ 161 #ifdef INVARIANTS 162 panic("No memory for VRF:%d", vrf_id); 163 #endif 164 return (NULL); 165 } 166 /* setup the VRF */ 167 memset(vrf, 0, sizeof(struct sctp_vrf)); 168 vrf->vrf_id = vrf_id; 169 LIST_INIT(&vrf->ifnlist); 170 vrf->total_ifa_count = 0; 171 vrf->refcount = 0; 172 /* now also setup table ids */ 173 SCTP_INIT_VRF_TABLEID(vrf); 174 /* Init the HASH of addresses */ 175 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 176 &vrf->vrf_addr_hashmark); 177 if (vrf->vrf_addr_hash == NULL) { 178 /* No memory */ 179 #ifdef INVARIANTS 180 panic("No memory for VRF:%d", vrf_id); 181 #endif 182 SCTP_FREE(vrf, SCTP_M_VRF); 183 return (NULL); 184 } 185 /* Add it to the hash table */ 186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 187 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 189 return (vrf); 190 } 191 192 193 struct sctp_ifn * 194 sctp_find_ifn(void *ifn, uint32_t ifn_index) 195 { 196 struct sctp_ifn *sctp_ifnp; 197 struct sctp_ifnlist *hash_ifn_head; 198 199 /* 200 * We assume the lock is held for the addresses if that's wrong 201 * problems could occur :-) 202 */ 203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 205 if (sctp_ifnp->ifn_index == ifn_index) { 206 return (sctp_ifnp); 207 } 208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 209 return (sctp_ifnp); 210 } 211 } 212 return (NULL); 213 } 214 215 216 struct sctp_vrf * 217 sctp_find_vrf(uint32_t vrf_id) 218 { 219 struct sctp_vrflist *bucket; 220 struct sctp_vrf *liste; 221 222 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 223 LIST_FOREACH(liste, bucket, next_vrf) { 224 if (vrf_id == liste->vrf_id) { 225 return (liste); 226 } 227 } 228 return (NULL); 229 } 230 231 232 void 233 sctp_free_vrf(struct sctp_vrf *vrf) 234 { 235 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 236 if (vrf->vrf_addr_hash) { 237 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 238 vrf->vrf_addr_hash = NULL; 239 } 240 /* We zero'd the count */ 241 LIST_REMOVE(vrf, next_vrf); 242 SCTP_FREE(vrf, SCTP_M_VRF); 243 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 244 } 245 } 246 247 248 void 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 250 { 251 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 252 /* We zero'd the count */ 253 if (sctp_ifnp->vrf) { 254 sctp_free_vrf(sctp_ifnp->vrf); 255 } 256 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 257 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 258 } 259 } 260 261 262 void 263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 264 { 265 struct sctp_ifn *sctp_ifnp; 266 267 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 268 if (sctp_ifnp != NULL) { 269 sctp_ifnp->ifn_mtu = mtu; 270 } 271 } 272 273 274 void 275 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 276 { 277 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 278 /* We zero'd the count */ 279 if (sctp_ifap->ifn_p) { 280 sctp_free_ifn(sctp_ifap->ifn_p); 281 } 282 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 283 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 284 } 285 } 286 287 288 static void 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 290 { 291 struct sctp_ifn *found; 292 293 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 294 if (found == NULL) { 295 /* Not in the list.. sorry */ 296 return; 297 } 298 if (hold_addr_lock == 0) 299 SCTP_IPI_ADDR_WLOCK(); 300 LIST_REMOVE(sctp_ifnp, next_bucket); 301 LIST_REMOVE(sctp_ifnp, next_ifn); 302 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 303 sctp_ifnp->registered_af); 304 if (hold_addr_lock == 0) 305 SCTP_IPI_ADDR_WUNLOCK(); 306 /* Take away the reference, and possibly free it */ 307 sctp_free_ifn(sctp_ifnp); 308 } 309 310 311 void 312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 313 const char *if_name, uint32_t ifn_index) 314 { 315 struct sctp_vrf *vrf; 316 struct sctp_ifa *sctp_ifap; 317 318 SCTP_IPI_ADDR_RLOCK(); 319 vrf = sctp_find_vrf(vrf_id); 320 if (vrf == NULL) { 321 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 322 goto out; 323 324 } 325 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 326 if (sctp_ifap == NULL) { 327 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 328 goto out; 329 } 330 if (sctp_ifap->ifn_p == NULL) { 331 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 332 goto out; 333 } 334 if (if_name) { 335 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 337 sctp_ifap->ifn_p->ifn_name, if_name); 338 goto out; 339 } 340 } else { 341 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 342 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 343 sctp_ifap->ifn_p->ifn_index, ifn_index); 344 goto out; 345 } 346 } 347 348 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 349 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 350 out: 351 SCTP_IPI_ADDR_RUNLOCK(); 352 } 353 354 355 void 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 357 const char *if_name, uint32_t ifn_index) 358 { 359 struct sctp_vrf *vrf; 360 struct sctp_ifa *sctp_ifap; 361 362 SCTP_IPI_ADDR_RLOCK(); 363 vrf = sctp_find_vrf(vrf_id); 364 if (vrf == NULL) { 365 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 366 goto out; 367 368 } 369 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 370 if (sctp_ifap == NULL) { 371 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 372 goto out; 373 } 374 if (sctp_ifap->ifn_p == NULL) { 375 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 376 goto out; 377 } 378 if (if_name) { 379 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 380 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 381 sctp_ifap->ifn_p->ifn_name, if_name); 382 goto out; 383 } 384 } else { 385 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 386 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 387 sctp_ifap->ifn_p->ifn_index, ifn_index); 388 goto out; 389 } 390 } 391 392 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 393 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 394 out: 395 SCTP_IPI_ADDR_RUNLOCK(); 396 } 397 398 399 /*- 400 * Add an ifa to an ifn. 401 * Register the interface as necessary. 402 * NOTE: ADDR write lock MUST be held. 403 */ 404 static void 405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 406 { 407 int ifa_af; 408 409 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 410 sctp_ifap->ifn_p = sctp_ifnp; 411 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 412 /* update address counts */ 413 sctp_ifnp->ifa_count++; 414 ifa_af = sctp_ifap->address.sa.sa_family; 415 switch (ifa_af) { 416 #ifdef INET 417 case AF_INET: 418 sctp_ifnp->num_v4++; 419 break; 420 #endif 421 #ifdef INET6 422 case AF_INET6: 423 sctp_ifnp->num_v6++; 424 break; 425 #endif 426 default: 427 break; 428 } 429 if (sctp_ifnp->ifa_count == 1) { 430 /* register the new interface */ 431 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 432 sctp_ifnp->registered_af = ifa_af; 433 } 434 } 435 436 437 /*- 438 * Remove an ifa from its ifn. 439 * If no more addresses exist, remove the ifn too. Otherwise, re-register 440 * the interface based on the remaining address families left. 441 * NOTE: ADDR write lock MUST be held. 442 */ 443 static void 444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 445 { 446 LIST_REMOVE(sctp_ifap, next_ifa); 447 if (sctp_ifap->ifn_p) { 448 /* update address counts */ 449 sctp_ifap->ifn_p->ifa_count--; 450 switch (sctp_ifap->address.sa.sa_family) { 451 #ifdef INET 452 case AF_INET: 453 sctp_ifap->ifn_p->num_v4--; 454 break; 455 #endif 456 #ifdef INET6 457 case AF_INET6: 458 sctp_ifap->ifn_p->num_v6--; 459 break; 460 #endif 461 default: 462 break; 463 } 464 465 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 466 /* remove the ifn, possibly freeing it */ 467 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 468 } else { 469 /* re-register address family type, if needed */ 470 if ((sctp_ifap->ifn_p->num_v6 == 0) && 471 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 472 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 473 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 474 sctp_ifap->ifn_p->registered_af = AF_INET; 475 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 476 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 477 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 478 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 479 sctp_ifap->ifn_p->registered_af = AF_INET6; 480 } 481 /* free the ifn refcount */ 482 sctp_free_ifn(sctp_ifap->ifn_p); 483 } 484 sctp_ifap->ifn_p = NULL; 485 } 486 } 487 488 489 struct sctp_ifa * 490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 491 uint32_t ifn_type, const char *if_name, void *ifa, 492 struct sockaddr *addr, uint32_t ifa_flags, 493 int dynamic_add) 494 { 495 struct sctp_vrf *vrf; 496 struct sctp_ifn *sctp_ifnp = NULL; 497 struct sctp_ifa *sctp_ifap = NULL; 498 struct sctp_ifalist *hash_addr_head; 499 struct sctp_ifnlist *hash_ifn_head; 500 uint32_t hash_of_addr; 501 int new_ifn_af = 0; 502 503 #ifdef SCTP_DEBUG 504 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 505 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 506 #endif 507 SCTP_IPI_ADDR_WLOCK(); 508 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 509 if (sctp_ifnp) { 510 vrf = sctp_ifnp->vrf; 511 } else { 512 vrf = sctp_find_vrf(vrf_id); 513 if (vrf == NULL) { 514 vrf = sctp_allocate_vrf(vrf_id); 515 if (vrf == NULL) { 516 SCTP_IPI_ADDR_WUNLOCK(); 517 return (NULL); 518 } 519 } 520 } 521 if (sctp_ifnp == NULL) { 522 /* 523 * build one and add it, can't hold lock until after malloc 524 * done though. 525 */ 526 SCTP_IPI_ADDR_WUNLOCK(); 527 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 528 sizeof(struct sctp_ifn), SCTP_M_IFN); 529 if (sctp_ifnp == NULL) { 530 #ifdef INVARIANTS 531 panic("No memory for IFN"); 532 #endif 533 return (NULL); 534 } 535 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 536 sctp_ifnp->ifn_index = ifn_index; 537 sctp_ifnp->ifn_p = ifn; 538 sctp_ifnp->ifn_type = ifn_type; 539 sctp_ifnp->refcount = 0; 540 sctp_ifnp->vrf = vrf; 541 atomic_add_int(&vrf->refcount, 1); 542 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 543 if (if_name != NULL) { 544 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 545 } else { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 547 } 548 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 549 LIST_INIT(&sctp_ifnp->ifalist); 550 SCTP_IPI_ADDR_WLOCK(); 551 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 552 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 553 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 554 new_ifn_af = 1; 555 } 556 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 557 if (sctp_ifap) { 558 /* Hmm, it already exists? */ 559 if ((sctp_ifap->ifn_p) && 560 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 561 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 562 sctp_ifap->ifn_p->ifn_name, ifn_index, 563 (void *)sctp_ifap); 564 if (new_ifn_af) { 565 /* Remove the created one that we don't want */ 566 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 567 } 568 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 569 /* easy to solve, just switch back to active */ 570 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 571 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 572 sctp_ifap->ifn_p = sctp_ifnp; 573 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 574 } 575 exit_stage_left: 576 SCTP_IPI_ADDR_WUNLOCK(); 577 return (sctp_ifap); 578 } else { 579 if (sctp_ifap->ifn_p) { 580 /* 581 * The last IFN gets the address, remove the 582 * old one 583 */ 584 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 585 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 586 sctp_ifap->ifn_p->ifn_index, if_name, 587 ifn_index); 588 /* remove the address from the old ifn */ 589 sctp_remove_ifa_from_ifn(sctp_ifap); 590 /* move the address over to the new ifn */ 591 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 592 goto exit_stage_left; 593 } else { 594 /* repair ifnp which was NULL ? */ 595 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 596 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 597 (void *)sctp_ifnp, (void *)sctp_ifap); 598 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 599 } 600 goto exit_stage_left; 601 } 602 } 603 SCTP_IPI_ADDR_WUNLOCK(); 604 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 605 if (sctp_ifap == NULL) { 606 #ifdef INVARIANTS 607 panic("No memory for IFA"); 608 #endif 609 return (NULL); 610 } 611 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 612 sctp_ifap->ifn_p = sctp_ifnp; 613 atomic_add_int(&sctp_ifnp->refcount, 1); 614 sctp_ifap->vrf_id = vrf_id; 615 sctp_ifap->ifa = ifa; 616 memcpy(&sctp_ifap->address, addr, addr->sa_len); 617 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 618 sctp_ifap->flags = ifa_flags; 619 /* Set scope */ 620 switch (sctp_ifap->address.sa.sa_family) { 621 #ifdef INET 622 case AF_INET: 623 { 624 struct sockaddr_in *sin; 625 626 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 627 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 628 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 629 sctp_ifap->src_is_loop = 1; 630 } 631 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 632 sctp_ifap->src_is_priv = 1; 633 } 634 sctp_ifnp->num_v4++; 635 if (new_ifn_af) 636 new_ifn_af = AF_INET; 637 break; 638 } 639 #endif 640 #ifdef INET6 641 case AF_INET6: 642 { 643 /* ok to use deprecated addresses? */ 644 struct sockaddr_in6 *sin6; 645 646 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 647 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 648 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 649 sctp_ifap->src_is_loop = 1; 650 } 651 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 652 sctp_ifap->src_is_priv = 1; 653 } 654 sctp_ifnp->num_v6++; 655 if (new_ifn_af) 656 new_ifn_af = AF_INET6; 657 break; 658 } 659 #endif 660 default: 661 new_ifn_af = 0; 662 break; 663 } 664 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 665 666 if ((sctp_ifap->src_is_priv == 0) && 667 (sctp_ifap->src_is_loop == 0)) { 668 sctp_ifap->src_is_glob = 1; 669 } 670 SCTP_IPI_ADDR_WLOCK(); 671 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 672 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 673 sctp_ifap->refcount = 1; 674 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 675 sctp_ifnp->ifa_count++; 676 vrf->total_ifa_count++; 677 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 678 if (new_ifn_af) { 679 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 680 sctp_ifnp->registered_af = new_ifn_af; 681 } 682 SCTP_IPI_ADDR_WUNLOCK(); 683 if (dynamic_add) { 684 /* 685 * Bump up the refcount so that when the timer completes it 686 * will drop back down. 687 */ 688 struct sctp_laddr *wi; 689 690 atomic_add_int(&sctp_ifap->refcount, 1); 691 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 692 if (wi == NULL) { 693 /* 694 * Gak, what can we do? We have lost an address 695 * change can you say HOSED? 696 */ 697 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 698 /* Opps, must decrement the count */ 699 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 700 if_name); 701 return (NULL); 702 } 703 SCTP_INCR_LADDR_COUNT(); 704 bzero(wi, sizeof(*wi)); 705 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 706 wi->ifa = sctp_ifap; 707 wi->action = SCTP_ADD_IP_ADDRESS; 708 709 SCTP_WQ_ADDR_LOCK(); 710 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 711 SCTP_WQ_ADDR_UNLOCK(); 712 713 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 714 (struct sctp_inpcb *)NULL, 715 (struct sctp_tcb *)NULL, 716 (struct sctp_nets *)NULL); 717 } else { 718 /* it's ready for use */ 719 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 720 } 721 return (sctp_ifap); 722 } 723 724 void 725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 726 uint32_t ifn_index, const char *if_name) 727 { 728 struct sctp_vrf *vrf; 729 struct sctp_ifa *sctp_ifap = NULL; 730 731 SCTP_IPI_ADDR_WLOCK(); 732 vrf = sctp_find_vrf(vrf_id); 733 if (vrf == NULL) { 734 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 735 goto out_now; 736 } 737 #ifdef SCTP_DEBUG 738 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 739 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 740 #endif 741 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 742 if (sctp_ifap) { 743 /* Validate the delete */ 744 if (sctp_ifap->ifn_p) { 745 int valid = 0; 746 747 /*- 748 * The name has priority over the ifn_index 749 * if its given. We do this especially for 750 * panda who might recycle indexes fast. 751 */ 752 if (if_name) { 753 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 754 /* They match its a correct delete */ 755 valid = 1; 756 } 757 } 758 if (!valid) { 759 /* last ditch check ifn_index */ 760 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 761 valid = 1; 762 } 763 } 764 if (!valid) { 765 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 766 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 768 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 769 SCTP_IPI_ADDR_WUNLOCK(); 770 return; 771 } 772 } 773 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 774 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 775 /* 776 * We don't set the flag. This means that the structure will 777 * hang around in EP's that have bound specific to it until 778 * they close. This gives us TCP like behavior if someone 779 * removes an address (or for that matter adds it right 780 * back). 781 */ 782 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 783 vrf->total_ifa_count--; 784 LIST_REMOVE(sctp_ifap, next_bucket); 785 sctp_remove_ifa_from_ifn(sctp_ifap); 786 } 787 #ifdef SCTP_DEBUG 788 else { 789 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 790 ifn_index); 791 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 792 } 793 #endif 794 795 out_now: 796 SCTP_IPI_ADDR_WUNLOCK(); 797 if (sctp_ifap) { 798 struct sctp_laddr *wi; 799 800 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 801 if (wi == NULL) { 802 /* 803 * Gak, what can we do? We have lost an address 804 * change can you say HOSED? 805 */ 806 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 807 808 /* Oops, must decrement the count */ 809 sctp_free_ifa(sctp_ifap); 810 return; 811 } 812 SCTP_INCR_LADDR_COUNT(); 813 bzero(wi, sizeof(*wi)); 814 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 815 wi->ifa = sctp_ifap; 816 wi->action = SCTP_DEL_IP_ADDRESS; 817 SCTP_WQ_ADDR_LOCK(); 818 /* 819 * Should this really be a tailq? As it is we will process 820 * the newest first :-0 821 */ 822 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 823 SCTP_WQ_ADDR_UNLOCK(); 824 825 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 826 (struct sctp_inpcb *)NULL, 827 (struct sctp_tcb *)NULL, 828 (struct sctp_nets *)NULL); 829 } 830 return; 831 } 832 833 834 static int 835 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 836 { 837 int loopback_scope; 838 839 #if defined(INET) 840 int ipv4_local_scope, ipv4_addr_legal; 841 842 #endif 843 #if defined(INET6) 844 int local_scope, site_scope, ipv6_addr_legal; 845 846 #endif 847 struct sctp_vrf *vrf; 848 struct sctp_ifn *sctp_ifn; 849 struct sctp_ifa *sctp_ifa; 850 851 loopback_scope = stcb->asoc.scope.loopback_scope; 852 #if defined(INET) 853 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 854 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 855 #endif 856 #if defined(INET6) 857 local_scope = stcb->asoc.scope.local_scope; 858 site_scope = stcb->asoc.scope.site_scope; 859 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 860 #endif 861 862 SCTP_IPI_ADDR_RLOCK(); 863 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 864 if (vrf == NULL) { 865 /* no vrf, no addresses */ 866 SCTP_IPI_ADDR_RUNLOCK(); 867 return (0); 868 } 869 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 870 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 871 if ((loopback_scope == 0) && 872 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 873 continue; 874 } 875 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 876 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 877 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 878 /* 879 * We allow pending addresses, where 880 * we have sent an asconf-add to be 881 * considered valid. 882 */ 883 continue; 884 } 885 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 886 continue; 887 } 888 switch (sctp_ifa->address.sa.sa_family) { 889 #ifdef INET 890 case AF_INET: 891 if (ipv4_addr_legal) { 892 struct sockaddr_in *sin, 893 *rsin; 894 895 sin = &sctp_ifa->address.sin; 896 rsin = (struct sockaddr_in *)to; 897 if ((ipv4_local_scope == 0) && 898 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 899 continue; 900 } 901 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 902 SCTP_IPI_ADDR_RUNLOCK(); 903 return (1); 904 } 905 } 906 break; 907 #endif 908 #ifdef INET6 909 case AF_INET6: 910 if (ipv6_addr_legal) { 911 struct sockaddr_in6 *sin6, 912 *rsin6; 913 914 sin6 = &sctp_ifa->address.sin6; 915 rsin6 = (struct sockaddr_in6 *)to; 916 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 917 if (local_scope == 0) 918 continue; 919 if (sin6->sin6_scope_id == 0) { 920 if (sa6_recoverscope(sin6) != 0) 921 continue; 922 } 923 } 924 if ((site_scope == 0) && 925 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 926 continue; 927 } 928 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 929 SCTP_IPI_ADDR_RUNLOCK(); 930 return (1); 931 } 932 } 933 break; 934 #endif 935 default: 936 /* TSNH */ 937 break; 938 } 939 } 940 } 941 } else { 942 struct sctp_laddr *laddr; 943 944 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 945 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 946 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 947 continue; 948 } 949 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 950 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 951 /* 952 * We allow pending addresses, where we have 953 * sent an asconf-add to be considered 954 * valid. 955 */ 956 continue; 957 } 958 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 959 continue; 960 } 961 switch (to->sa_family) { 962 #ifdef INET 963 case AF_INET: 964 { 965 struct sockaddr_in *sin, *rsin; 966 967 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 968 rsin = (struct sockaddr_in *)to; 969 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 970 SCTP_IPI_ADDR_RUNLOCK(); 971 return (1); 972 } 973 break; 974 } 975 #endif 976 #ifdef INET6 977 case AF_INET6: 978 { 979 struct sockaddr_in6 *sin6, *rsin6; 980 981 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 982 rsin6 = (struct sockaddr_in6 *)to; 983 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 984 SCTP_IPI_ADDR_RUNLOCK(); 985 return (1); 986 } 987 break; 988 } 989 990 #endif 991 default: 992 /* TSNH */ 993 break; 994 } 995 996 } 997 } 998 SCTP_IPI_ADDR_RUNLOCK(); 999 return (0); 1000 } 1001 1002 1003 static struct sctp_tcb * 1004 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1005 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1006 { 1007 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1008 /* 1009 * If we support the TCP model, then we must now dig through to see 1010 * if we can find our endpoint in the list of tcp ep's. 1011 */ 1012 uint16_t lport, rport; 1013 struct sctppcbhead *ephead; 1014 struct sctp_inpcb *inp; 1015 struct sctp_laddr *laddr; 1016 struct sctp_tcb *stcb; 1017 struct sctp_nets *net; 1018 1019 if ((to == NULL) || (from == NULL)) { 1020 return (NULL); 1021 } 1022 switch (to->sa_family) { 1023 #ifdef INET 1024 case AF_INET: 1025 if (from->sa_family == AF_INET) { 1026 lport = ((struct sockaddr_in *)to)->sin_port; 1027 rport = ((struct sockaddr_in *)from)->sin_port; 1028 } else { 1029 return (NULL); 1030 } 1031 break; 1032 #endif 1033 #ifdef INET6 1034 case AF_INET6: 1035 if (from->sa_family == AF_INET6) { 1036 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1037 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042 #endif 1043 default: 1044 return (NULL); 1045 } 1046 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1047 /* 1048 * Ok now for each of the guys in this bucket we must look and see: 1049 * - Does the remote port match. - Does there single association's 1050 * addresses match this address (to). If so we update p_ep to point 1051 * to this ep and return the tcb from it. 1052 */ 1053 LIST_FOREACH(inp, ephead, sctp_hash) { 1054 SCTP_INP_RLOCK(inp); 1055 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1056 SCTP_INP_RUNLOCK(inp); 1057 continue; 1058 } 1059 if (lport != inp->sctp_lport) { 1060 SCTP_INP_RUNLOCK(inp); 1061 continue; 1062 } 1063 if (inp->def_vrf_id != vrf_id) { 1064 SCTP_INP_RUNLOCK(inp); 1065 continue; 1066 } 1067 /* check to see if the ep has one of the addresses */ 1068 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1069 /* We are NOT bound all, so look further */ 1070 int match = 0; 1071 1072 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1073 1074 if (laddr->ifa == NULL) { 1075 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 1076 continue; 1077 } 1078 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1079 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1080 continue; 1081 } 1082 if (laddr->ifa->address.sa.sa_family == 1083 to->sa_family) { 1084 /* see if it matches */ 1085 #ifdef INET 1086 if (from->sa_family == AF_INET) { 1087 struct sockaddr_in *intf_addr, 1088 *sin; 1089 1090 intf_addr = &laddr->ifa->address.sin; 1091 sin = (struct sockaddr_in *)to; 1092 if (sin->sin_addr.s_addr == 1093 intf_addr->sin_addr.s_addr) { 1094 match = 1; 1095 break; 1096 } 1097 } 1098 #endif 1099 #ifdef INET6 1100 if (from->sa_family == AF_INET6) { 1101 struct sockaddr_in6 *intf_addr6; 1102 struct sockaddr_in6 *sin6; 1103 1104 sin6 = (struct sockaddr_in6 *) 1105 to; 1106 intf_addr6 = &laddr->ifa->address.sin6; 1107 1108 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1109 intf_addr6)) { 1110 match = 1; 1111 break; 1112 } 1113 } 1114 #endif 1115 } 1116 } 1117 if (match == 0) { 1118 /* This endpoint does not have this address */ 1119 SCTP_INP_RUNLOCK(inp); 1120 continue; 1121 } 1122 } 1123 /* 1124 * Ok if we hit here the ep has the address, does it hold 1125 * the tcb? 1126 */ 1127 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1128 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1129 if (stcb == NULL) { 1130 SCTP_INP_RUNLOCK(inp); 1131 continue; 1132 } 1133 SCTP_TCB_LOCK(stcb); 1134 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1135 SCTP_TCB_UNLOCK(stcb); 1136 SCTP_INP_RUNLOCK(inp); 1137 continue; 1138 } 1139 if (stcb->rport != rport) { 1140 /* remote port does not match. */ 1141 SCTP_TCB_UNLOCK(stcb); 1142 SCTP_INP_RUNLOCK(inp); 1143 continue; 1144 } 1145 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1146 SCTP_TCB_UNLOCK(stcb); 1147 SCTP_INP_RUNLOCK(inp); 1148 continue; 1149 } 1150 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1151 SCTP_TCB_UNLOCK(stcb); 1152 SCTP_INP_RUNLOCK(inp); 1153 continue; 1154 } 1155 /* Does this TCB have a matching address? */ 1156 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1157 1158 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1159 /* not the same family, can't be a match */ 1160 continue; 1161 } 1162 switch (from->sa_family) { 1163 #ifdef INET 1164 case AF_INET: 1165 { 1166 struct sockaddr_in *sin, *rsin; 1167 1168 sin = (struct sockaddr_in *)&net->ro._l_addr; 1169 rsin = (struct sockaddr_in *)from; 1170 if (sin->sin_addr.s_addr == 1171 rsin->sin_addr.s_addr) { 1172 /* found it */ 1173 if (netp != NULL) { 1174 *netp = net; 1175 } 1176 /* 1177 * Update the endpoint 1178 * pointer 1179 */ 1180 *inp_p = inp; 1181 SCTP_INP_RUNLOCK(inp); 1182 return (stcb); 1183 } 1184 break; 1185 } 1186 #endif 1187 #ifdef INET6 1188 case AF_INET6: 1189 { 1190 struct sockaddr_in6 *sin6, *rsin6; 1191 1192 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1193 rsin6 = (struct sockaddr_in6 *)from; 1194 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1195 rsin6)) { 1196 /* found it */ 1197 if (netp != NULL) { 1198 *netp = net; 1199 } 1200 /* 1201 * Update the endpoint 1202 * pointer 1203 */ 1204 *inp_p = inp; 1205 SCTP_INP_RUNLOCK(inp); 1206 return (stcb); 1207 } 1208 break; 1209 } 1210 #endif 1211 default: 1212 /* TSNH */ 1213 break; 1214 } 1215 } 1216 SCTP_TCB_UNLOCK(stcb); 1217 SCTP_INP_RUNLOCK(inp); 1218 } 1219 return (NULL); 1220 } 1221 1222 1223 /* 1224 * rules for use 1225 * 1226 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1227 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1228 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1229 * NULL. 1230 */ 1231 1232 struct sctp_tcb * 1233 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1234 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1235 { 1236 struct sctpasochead *head; 1237 struct sctp_inpcb *inp; 1238 struct sctp_tcb *stcb = NULL; 1239 struct sctp_nets *net; 1240 uint16_t rport; 1241 1242 inp = *inp_p; 1243 switch (remote->sa_family) { 1244 #ifdef INET 1245 case AF_INET: 1246 rport = (((struct sockaddr_in *)remote)->sin_port); 1247 break; 1248 #endif 1249 #ifdef INET6 1250 case AF_INET6: 1251 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1252 break; 1253 #endif 1254 default: 1255 return (NULL); 1256 } 1257 if (locked_tcb) { 1258 /* 1259 * UN-lock so we can do proper locking here this occurs when 1260 * called from load_addresses_from_init. 1261 */ 1262 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1263 SCTP_TCB_UNLOCK(locked_tcb); 1264 } 1265 SCTP_INP_INFO_RLOCK(); 1266 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1267 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1268 /*- 1269 * Now either this guy is our listener or it's the 1270 * connector. If it is the one that issued the connect, then 1271 * it's only chance is to be the first TCB in the list. If 1272 * it is the acceptor, then do the special_lookup to hash 1273 * and find the real inp. 1274 */ 1275 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1276 /* to is peer addr, from is my addr */ 1277 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1278 netp, inp->def_vrf_id); 1279 if ((stcb != NULL) && (locked_tcb == NULL)) { 1280 /* we have a locked tcb, lower refcount */ 1281 SCTP_INP_DECR_REF(inp); 1282 } 1283 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1284 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1285 SCTP_TCB_LOCK(locked_tcb); 1286 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1287 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1288 } 1289 SCTP_INP_INFO_RUNLOCK(); 1290 return (stcb); 1291 } else { 1292 SCTP_INP_WLOCK(inp); 1293 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1294 goto null_return; 1295 } 1296 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1297 if (stcb == NULL) { 1298 goto null_return; 1299 } 1300 SCTP_TCB_LOCK(stcb); 1301 1302 if (stcb->rport != rport) { 1303 /* remote port does not match. */ 1304 SCTP_TCB_UNLOCK(stcb); 1305 goto null_return; 1306 } 1307 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1308 SCTP_TCB_UNLOCK(stcb); 1309 goto null_return; 1310 } 1311 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1312 SCTP_TCB_UNLOCK(stcb); 1313 goto null_return; 1314 } 1315 /* now look at the list of remote addresses */ 1316 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1317 #ifdef INVARIANTS 1318 if (net == (TAILQ_NEXT(net, sctp_next))) { 1319 panic("Corrupt net list"); 1320 } 1321 #endif 1322 if (net->ro._l_addr.sa.sa_family != 1323 remote->sa_family) { 1324 /* not the same family */ 1325 continue; 1326 } 1327 switch (remote->sa_family) { 1328 #ifdef INET 1329 case AF_INET: 1330 { 1331 struct sockaddr_in *sin, 1332 *rsin; 1333 1334 sin = (struct sockaddr_in *) 1335 &net->ro._l_addr; 1336 rsin = (struct sockaddr_in *)remote; 1337 if (sin->sin_addr.s_addr == 1338 rsin->sin_addr.s_addr) { 1339 /* found it */ 1340 if (netp != NULL) { 1341 *netp = net; 1342 } 1343 if (locked_tcb == NULL) { 1344 SCTP_INP_DECR_REF(inp); 1345 } else if (locked_tcb != stcb) { 1346 SCTP_TCB_LOCK(locked_tcb); 1347 } 1348 if (locked_tcb) { 1349 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1350 } 1351 SCTP_INP_WUNLOCK(inp); 1352 SCTP_INP_INFO_RUNLOCK(); 1353 return (stcb); 1354 } 1355 break; 1356 } 1357 #endif 1358 #ifdef INET6 1359 case AF_INET6: 1360 { 1361 struct sockaddr_in6 *sin6, 1362 *rsin6; 1363 1364 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1365 rsin6 = (struct sockaddr_in6 *)remote; 1366 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1367 rsin6)) { 1368 /* found it */ 1369 if (netp != NULL) { 1370 *netp = net; 1371 } 1372 if (locked_tcb == NULL) { 1373 SCTP_INP_DECR_REF(inp); 1374 } else if (locked_tcb != stcb) { 1375 SCTP_TCB_LOCK(locked_tcb); 1376 } 1377 if (locked_tcb) { 1378 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1379 } 1380 SCTP_INP_WUNLOCK(inp); 1381 SCTP_INP_INFO_RUNLOCK(); 1382 return (stcb); 1383 } 1384 break; 1385 } 1386 #endif 1387 default: 1388 /* TSNH */ 1389 break; 1390 } 1391 } 1392 SCTP_TCB_UNLOCK(stcb); 1393 } 1394 } else { 1395 SCTP_INP_WLOCK(inp); 1396 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1397 goto null_return; 1398 } 1399 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1400 inp->sctp_hashmark)]; 1401 if (head == NULL) { 1402 goto null_return; 1403 } 1404 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1405 if (stcb->rport != rport) { 1406 /* remote port does not match */ 1407 continue; 1408 } 1409 SCTP_TCB_LOCK(stcb); 1410 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1411 SCTP_TCB_UNLOCK(stcb); 1412 continue; 1413 } 1414 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1415 SCTP_TCB_UNLOCK(stcb); 1416 continue; 1417 } 1418 /* now look at the list of remote addresses */ 1419 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1420 #ifdef INVARIANTS 1421 if (net == (TAILQ_NEXT(net, sctp_next))) { 1422 panic("Corrupt net list"); 1423 } 1424 #endif 1425 if (net->ro._l_addr.sa.sa_family != 1426 remote->sa_family) { 1427 /* not the same family */ 1428 continue; 1429 } 1430 switch (remote->sa_family) { 1431 #ifdef INET 1432 case AF_INET: 1433 { 1434 struct sockaddr_in *sin, 1435 *rsin; 1436 1437 sin = (struct sockaddr_in *) 1438 &net->ro._l_addr; 1439 rsin = (struct sockaddr_in *)remote; 1440 if (sin->sin_addr.s_addr == 1441 rsin->sin_addr.s_addr) { 1442 /* found it */ 1443 if (netp != NULL) { 1444 *netp = net; 1445 } 1446 if (locked_tcb == NULL) { 1447 SCTP_INP_DECR_REF(inp); 1448 } else if (locked_tcb != stcb) { 1449 SCTP_TCB_LOCK(locked_tcb); 1450 } 1451 if (locked_tcb) { 1452 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1453 } 1454 SCTP_INP_WUNLOCK(inp); 1455 SCTP_INP_INFO_RUNLOCK(); 1456 return (stcb); 1457 } 1458 break; 1459 } 1460 #endif 1461 #ifdef INET6 1462 case AF_INET6: 1463 { 1464 struct sockaddr_in6 *sin6, 1465 *rsin6; 1466 1467 sin6 = (struct sockaddr_in6 *) 1468 &net->ro._l_addr; 1469 rsin6 = (struct sockaddr_in6 *)remote; 1470 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1471 rsin6)) { 1472 /* found it */ 1473 if (netp != NULL) { 1474 *netp = net; 1475 } 1476 if (locked_tcb == NULL) { 1477 SCTP_INP_DECR_REF(inp); 1478 } else if (locked_tcb != stcb) { 1479 SCTP_TCB_LOCK(locked_tcb); 1480 } 1481 if (locked_tcb) { 1482 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1483 } 1484 SCTP_INP_WUNLOCK(inp); 1485 SCTP_INP_INFO_RUNLOCK(); 1486 return (stcb); 1487 } 1488 break; 1489 } 1490 #endif 1491 default: 1492 /* TSNH */ 1493 break; 1494 } 1495 } 1496 SCTP_TCB_UNLOCK(stcb); 1497 } 1498 } 1499 null_return: 1500 /* clean up for returning null */ 1501 if (locked_tcb) { 1502 SCTP_TCB_LOCK(locked_tcb); 1503 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1504 } 1505 SCTP_INP_WUNLOCK(inp); 1506 SCTP_INP_INFO_RUNLOCK(); 1507 /* not found */ 1508 return (NULL); 1509 } 1510 1511 1512 /* 1513 * Find an association for a specific endpoint using the association id given 1514 * out in the COMM_UP notification 1515 */ 1516 struct sctp_tcb * 1517 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1518 { 1519 /* 1520 * Use my the assoc_id to find a endpoint 1521 */ 1522 struct sctpasochead *head; 1523 struct sctp_tcb *stcb; 1524 uint32_t id; 1525 1526 if (inp == NULL) { 1527 SCTP_PRINTF("TSNH ep_associd\n"); 1528 return (NULL); 1529 } 1530 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1531 SCTP_PRINTF("TSNH ep_associd0\n"); 1532 return (NULL); 1533 } 1534 id = (uint32_t) asoc_id; 1535 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1536 if (head == NULL) { 1537 /* invalid id TSNH */ 1538 SCTP_PRINTF("TSNH ep_associd1\n"); 1539 return (NULL); 1540 } 1541 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1542 if (stcb->asoc.assoc_id == id) { 1543 if (inp != stcb->sctp_ep) { 1544 /* 1545 * some other guy has the same id active (id 1546 * collision ??). 1547 */ 1548 SCTP_PRINTF("TSNH ep_associd2\n"); 1549 continue; 1550 } 1551 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1552 continue; 1553 } 1554 if (want_lock) { 1555 SCTP_TCB_LOCK(stcb); 1556 } 1557 return (stcb); 1558 } 1559 } 1560 return (NULL); 1561 } 1562 1563 1564 struct sctp_tcb * 1565 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1566 { 1567 struct sctp_tcb *stcb; 1568 1569 SCTP_INP_RLOCK(inp); 1570 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1571 SCTP_INP_RUNLOCK(inp); 1572 return (stcb); 1573 } 1574 1575 1576 /* 1577 * Endpoint probe expects that the INP_INFO is locked. 1578 */ 1579 static struct sctp_inpcb * 1580 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1581 uint16_t lport, uint32_t vrf_id) 1582 { 1583 struct sctp_inpcb *inp; 1584 struct sctp_laddr *laddr; 1585 1586 #ifdef INET 1587 struct sockaddr_in *sin; 1588 1589 #endif 1590 #ifdef INET6 1591 struct sockaddr_in6 *sin6; 1592 struct sockaddr_in6 *intf_addr6; 1593 1594 #endif 1595 int fnd; 1596 1597 #ifdef INET 1598 sin = NULL; 1599 #endif 1600 #ifdef INET6 1601 sin6 = NULL; 1602 #endif 1603 switch (nam->sa_family) { 1604 #ifdef INET 1605 case AF_INET: 1606 sin = (struct sockaddr_in *)nam; 1607 break; 1608 #endif 1609 #ifdef INET6 1610 case AF_INET6: 1611 sin6 = (struct sockaddr_in6 *)nam; 1612 break; 1613 #endif 1614 default: 1615 /* unsupported family */ 1616 return (NULL); 1617 } 1618 1619 if (head == NULL) 1620 return (NULL); 1621 1622 LIST_FOREACH(inp, head, sctp_hash) { 1623 SCTP_INP_RLOCK(inp); 1624 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1625 SCTP_INP_RUNLOCK(inp); 1626 continue; 1627 } 1628 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1629 (inp->sctp_lport == lport)) { 1630 /* got it */ 1631 #ifdef INET 1632 if ((nam->sa_family == AF_INET) && 1633 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1634 SCTP_IPV6_V6ONLY(inp)) { 1635 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1636 SCTP_INP_RUNLOCK(inp); 1637 continue; 1638 } 1639 #endif 1640 #ifdef INET6 1641 /* A V6 address and the endpoint is NOT bound V6 */ 1642 if (nam->sa_family == AF_INET6 && 1643 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1644 SCTP_INP_RUNLOCK(inp); 1645 continue; 1646 } 1647 #endif 1648 /* does a VRF id match? */ 1649 fnd = 0; 1650 if (inp->def_vrf_id == vrf_id) 1651 fnd = 1; 1652 1653 SCTP_INP_RUNLOCK(inp); 1654 if (!fnd) 1655 continue; 1656 return (inp); 1657 } 1658 SCTP_INP_RUNLOCK(inp); 1659 } 1660 switch (nam->sa_family) { 1661 #ifdef INET 1662 case AF_INET: 1663 if (sin->sin_addr.s_addr == INADDR_ANY) { 1664 /* Can't hunt for one that has no address specified */ 1665 return (NULL); 1666 } 1667 break; 1668 #endif 1669 #ifdef INET6 1670 case AF_INET6: 1671 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1672 /* Can't hunt for one that has no address specified */ 1673 return (NULL); 1674 } 1675 break; 1676 #endif 1677 default: 1678 break; 1679 } 1680 /* 1681 * ok, not bound to all so see if we can find a EP bound to this 1682 * address. 1683 */ 1684 LIST_FOREACH(inp, head, sctp_hash) { 1685 SCTP_INP_RLOCK(inp); 1686 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1687 SCTP_INP_RUNLOCK(inp); 1688 continue; 1689 } 1690 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1691 SCTP_INP_RUNLOCK(inp); 1692 continue; 1693 } 1694 /* 1695 * Ok this could be a likely candidate, look at all of its 1696 * addresses 1697 */ 1698 if (inp->sctp_lport != lport) { 1699 SCTP_INP_RUNLOCK(inp); 1700 continue; 1701 } 1702 /* does a VRF id match? */ 1703 fnd = 0; 1704 if (inp->def_vrf_id == vrf_id) 1705 fnd = 1; 1706 1707 if (!fnd) { 1708 SCTP_INP_RUNLOCK(inp); 1709 continue; 1710 } 1711 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1712 if (laddr->ifa == NULL) { 1713 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1714 __FUNCTION__); 1715 continue; 1716 } 1717 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1718 (void *)laddr->ifa); 1719 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1720 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1721 continue; 1722 } 1723 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1724 /* possible, see if it matches */ 1725 switch (nam->sa_family) { 1726 #ifdef INET 1727 case AF_INET: 1728 if (sin->sin_addr.s_addr == 1729 laddr->ifa->address.sin.sin_addr.s_addr) { 1730 SCTP_INP_RUNLOCK(inp); 1731 return (inp); 1732 } 1733 break; 1734 #endif 1735 #ifdef INET6 1736 case AF_INET6: 1737 intf_addr6 = &laddr->ifa->address.sin6; 1738 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1739 intf_addr6)) { 1740 SCTP_INP_RUNLOCK(inp); 1741 return (inp); 1742 } 1743 break; 1744 #endif 1745 } 1746 } 1747 } 1748 SCTP_INP_RUNLOCK(inp); 1749 } 1750 return (NULL); 1751 } 1752 1753 1754 static struct sctp_inpcb * 1755 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1756 { 1757 struct sctppcbhead *head; 1758 struct sctp_inpcb *t_inp; 1759 int fnd; 1760 1761 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1762 SCTP_BASE_INFO(hashmark))]; 1763 LIST_FOREACH(t_inp, head, sctp_hash) { 1764 if (t_inp->sctp_lport != lport) { 1765 continue; 1766 } 1767 /* is it in the VRF in question */ 1768 fnd = 0; 1769 if (t_inp->def_vrf_id == vrf_id) 1770 fnd = 1; 1771 if (!fnd) 1772 continue; 1773 1774 /* This one is in use. */ 1775 /* check the v6/v4 binding issue */ 1776 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1777 SCTP_IPV6_V6ONLY(t_inp)) { 1778 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1779 /* collision in V6 space */ 1780 return (t_inp); 1781 } else { 1782 /* inp is BOUND_V4 no conflict */ 1783 continue; 1784 } 1785 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1786 /* t_inp is bound v4 and v6, conflict always */ 1787 return (t_inp); 1788 } else { 1789 /* t_inp is bound only V4 */ 1790 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1791 SCTP_IPV6_V6ONLY(inp)) { 1792 /* no conflict */ 1793 continue; 1794 } 1795 /* else fall through to conflict */ 1796 } 1797 return (t_inp); 1798 } 1799 return (NULL); 1800 } 1801 1802 1803 int 1804 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1805 { 1806 /* For 1-2-1 with port reuse */ 1807 struct sctppcbhead *head; 1808 struct sctp_inpcb *tinp; 1809 1810 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1811 /* only works with port reuse on */ 1812 return (-1); 1813 } 1814 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1815 return (0); 1816 } 1817 SCTP_INP_RUNLOCK(inp); 1818 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1819 SCTP_BASE_INFO(hashmark))]; 1820 /* Kick out all non-listeners to the TCP hash */ 1821 LIST_FOREACH(tinp, head, sctp_hash) { 1822 if (tinp->sctp_lport != inp->sctp_lport) { 1823 continue; 1824 } 1825 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1826 continue; 1827 } 1828 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1829 continue; 1830 } 1831 if (tinp->sctp_socket->so_qlimit) { 1832 continue; 1833 } 1834 SCTP_INP_WLOCK(tinp); 1835 LIST_REMOVE(tinp, sctp_hash); 1836 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1837 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1838 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1839 SCTP_INP_WUNLOCK(tinp); 1840 } 1841 SCTP_INP_WLOCK(inp); 1842 /* Pull from where he was */ 1843 LIST_REMOVE(inp, sctp_hash); 1844 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1845 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1846 LIST_INSERT_HEAD(head, inp, sctp_hash); 1847 SCTP_INP_WUNLOCK(inp); 1848 SCTP_INP_RLOCK(inp); 1849 return (0); 1850 } 1851 1852 1853 struct sctp_inpcb * 1854 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1855 uint32_t vrf_id) 1856 { 1857 /* 1858 * First we check the hash table to see if someone has this port 1859 * bound with just the port. 1860 */ 1861 struct sctp_inpcb *inp; 1862 struct sctppcbhead *head; 1863 int lport; 1864 unsigned int i; 1865 1866 #ifdef INET 1867 struct sockaddr_in *sin; 1868 1869 #endif 1870 #ifdef INET6 1871 struct sockaddr_in6 *sin6; 1872 1873 #endif 1874 1875 switch (nam->sa_family) { 1876 #ifdef INET 1877 case AF_INET: 1878 sin = (struct sockaddr_in *)nam; 1879 lport = sin->sin_port; 1880 break; 1881 #endif 1882 #ifdef INET6 1883 case AF_INET6: 1884 sin6 = (struct sockaddr_in6 *)nam; 1885 lport = sin6->sin6_port; 1886 break; 1887 #endif 1888 default: 1889 return (NULL); 1890 } 1891 /* 1892 * I could cheat here and just cast to one of the types but we will 1893 * do it right. It also provides the check against an Unsupported 1894 * type too. 1895 */ 1896 /* Find the head of the ALLADDR chain */ 1897 if (have_lock == 0) { 1898 SCTP_INP_INFO_RLOCK(); 1899 } 1900 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1901 SCTP_BASE_INFO(hashmark))]; 1902 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1903 1904 /* 1905 * If the TCP model exists it could be that the main listening 1906 * endpoint is gone but there still exists a connected socket for 1907 * this guy. If so we can return the first one that we find. This 1908 * may NOT be the correct one so the caller should be wary on the 1909 * returned INP. Currently the only caller that sets find_tcp_pool 1910 * is in bindx where we are verifying that a user CAN bind the 1911 * address. He either has bound it already, or someone else has, or 1912 * its open to bind, so this is good enough. 1913 */ 1914 if (inp == NULL && find_tcp_pool) { 1915 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1916 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1917 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1918 if (inp) { 1919 break; 1920 } 1921 } 1922 } 1923 if (inp) { 1924 SCTP_INP_INCR_REF(inp); 1925 } 1926 if (have_lock == 0) { 1927 SCTP_INP_INFO_RUNLOCK(); 1928 } 1929 return (inp); 1930 } 1931 1932 1933 /* 1934 * Find an association for an endpoint with the pointer to whom you want to 1935 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1936 * need to change the *to to some other struct like a mbuf... 1937 */ 1938 struct sctp_tcb * 1939 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1940 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1941 uint32_t vrf_id) 1942 { 1943 struct sctp_inpcb *inp = NULL; 1944 struct sctp_tcb *stcb; 1945 1946 SCTP_INP_INFO_RLOCK(); 1947 if (find_tcp_pool) { 1948 if (inp_p != NULL) { 1949 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1950 vrf_id); 1951 } else { 1952 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1953 vrf_id); 1954 } 1955 if (stcb != NULL) { 1956 SCTP_INP_INFO_RUNLOCK(); 1957 return (stcb); 1958 } 1959 } 1960 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1961 if (inp_p != NULL) { 1962 *inp_p = inp; 1963 } 1964 SCTP_INP_INFO_RUNLOCK(); 1965 if (inp == NULL) { 1966 return (NULL); 1967 } 1968 /* 1969 * ok, we have an endpoint, now lets find the assoc for it (if any) 1970 * we now place the source address or from in the to of the find 1971 * endpoint call. Since in reality this chain is used from the 1972 * inbound packet side. 1973 */ 1974 if (inp_p != NULL) { 1975 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1976 NULL); 1977 } else { 1978 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 1979 NULL); 1980 } 1981 return (stcb); 1982 } 1983 1984 1985 /* 1986 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1987 * find all addresses that the sender has specified in any address list. Each 1988 * address will be used to lookup the TCB and see if one exits. 1989 */ 1990 static struct sctp_tcb * 1991 sctp_findassociation_special_addr(struct mbuf *m, int offset, 1992 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1993 struct sockaddr *dst) 1994 { 1995 struct sctp_paramhdr *phdr, parm_buf; 1996 1997 #if defined(INET) || defined(INET6) 1998 struct sctp_tcb *stcb; 1999 uint16_t ptype; 2000 2001 #endif 2002 uint16_t plen; 2003 2004 #ifdef INET 2005 struct sockaddr_in sin4; 2006 2007 #endif 2008 #ifdef INET6 2009 struct sockaddr_in6 sin6; 2010 2011 #endif 2012 2013 #ifdef INET 2014 memset(&sin4, 0, sizeof(sin4)); 2015 sin4.sin_len = sizeof(sin4); 2016 sin4.sin_family = AF_INET; 2017 sin4.sin_port = sh->src_port; 2018 #endif 2019 #ifdef INET6 2020 memset(&sin6, 0, sizeof(sin6)); 2021 sin6.sin6_len = sizeof(sin6); 2022 sin6.sin6_family = AF_INET6; 2023 sin6.sin6_port = sh->src_port; 2024 #endif 2025 2026 offset += sizeof(struct sctp_init_chunk); 2027 2028 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2029 while (phdr != NULL) { 2030 /* now we must see if we want the parameter */ 2031 #if defined(INET) || defined(INET6) 2032 ptype = ntohs(phdr->param_type); 2033 #endif 2034 plen = ntohs(phdr->param_length); 2035 if (plen == 0) { 2036 break; 2037 } 2038 #ifdef INET 2039 if (ptype == SCTP_IPV4_ADDRESS && 2040 plen == sizeof(struct sctp_ipv4addr_param)) { 2041 /* Get the rest of the address */ 2042 struct sctp_ipv4addr_param ip4_parm, *p4; 2043 2044 phdr = sctp_get_next_param(m, offset, 2045 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2046 if (phdr == NULL) { 2047 return (NULL); 2048 } 2049 p4 = (struct sctp_ipv4addr_param *)phdr; 2050 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2051 /* look it up */ 2052 stcb = sctp_findassociation_ep_addr(inp_p, 2053 (struct sockaddr *)&sin4, netp, dst, NULL); 2054 if (stcb != NULL) { 2055 return (stcb); 2056 } 2057 } 2058 #endif 2059 #ifdef INET6 2060 if (ptype == SCTP_IPV6_ADDRESS && 2061 plen == sizeof(struct sctp_ipv6addr_param)) { 2062 /* Get the rest of the address */ 2063 struct sctp_ipv6addr_param ip6_parm, *p6; 2064 2065 phdr = sctp_get_next_param(m, offset, 2066 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2067 if (phdr == NULL) { 2068 return (NULL); 2069 } 2070 p6 = (struct sctp_ipv6addr_param *)phdr; 2071 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2072 /* look it up */ 2073 stcb = sctp_findassociation_ep_addr(inp_p, 2074 (struct sockaddr *)&sin6, netp, dst, NULL); 2075 if (stcb != NULL) { 2076 return (stcb); 2077 } 2078 } 2079 #endif 2080 offset += SCTP_SIZE32(plen); 2081 phdr = sctp_get_next_param(m, offset, &parm_buf, 2082 sizeof(parm_buf)); 2083 } 2084 return (NULL); 2085 } 2086 2087 static struct sctp_tcb * 2088 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2089 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2090 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2091 { 2092 /* 2093 * Use my vtag to hash. If we find it we then verify the source addr 2094 * is in the assoc. If all goes well we save a bit on rec of a 2095 * packet. 2096 */ 2097 struct sctpasochead *head; 2098 struct sctp_nets *net; 2099 struct sctp_tcb *stcb; 2100 2101 SCTP_INP_INFO_RLOCK(); 2102 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2103 SCTP_BASE_INFO(hashasocmark))]; 2104 if (head == NULL) { 2105 /* invalid vtag */ 2106 SCTP_INP_INFO_RUNLOCK(); 2107 return (NULL); 2108 } 2109 LIST_FOREACH(stcb, head, sctp_asocs) { 2110 SCTP_INP_RLOCK(stcb->sctp_ep); 2111 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2112 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2113 continue; 2114 } 2115 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2116 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2117 continue; 2118 } 2119 SCTP_TCB_LOCK(stcb); 2120 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2121 if (stcb->asoc.my_vtag == vtag) { 2122 /* candidate */ 2123 if (stcb->rport != rport) { 2124 SCTP_TCB_UNLOCK(stcb); 2125 continue; 2126 } 2127 if (stcb->sctp_ep->sctp_lport != lport) { 2128 SCTP_TCB_UNLOCK(stcb); 2129 continue; 2130 } 2131 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2132 SCTP_TCB_UNLOCK(stcb); 2133 continue; 2134 } 2135 /* RRS:Need toaddr check here */ 2136 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2137 /* Endpoint does not own this address */ 2138 SCTP_TCB_UNLOCK(stcb); 2139 continue; 2140 } 2141 if (remote_tag) { 2142 /* 2143 * If we have both vtags that's all we match 2144 * on 2145 */ 2146 if (stcb->asoc.peer_vtag == remote_tag) { 2147 /* 2148 * If both tags match we consider it 2149 * conclusive and check NO 2150 * source/destination addresses 2151 */ 2152 goto conclusive; 2153 } 2154 } 2155 if (skip_src_check) { 2156 conclusive: 2157 if (from) { 2158 *netp = sctp_findnet(stcb, from); 2159 } else { 2160 *netp = NULL; /* unknown */ 2161 } 2162 if (inp_p) 2163 *inp_p = stcb->sctp_ep; 2164 SCTP_INP_INFO_RUNLOCK(); 2165 return (stcb); 2166 } 2167 net = sctp_findnet(stcb, from); 2168 if (net) { 2169 /* yep its him. */ 2170 *netp = net; 2171 SCTP_STAT_INCR(sctps_vtagexpress); 2172 *inp_p = stcb->sctp_ep; 2173 SCTP_INP_INFO_RUNLOCK(); 2174 return (stcb); 2175 } else { 2176 /* 2177 * not him, this should only happen in rare 2178 * cases so I peg it. 2179 */ 2180 SCTP_STAT_INCR(sctps_vtagbogus); 2181 } 2182 } 2183 SCTP_TCB_UNLOCK(stcb); 2184 } 2185 SCTP_INP_INFO_RUNLOCK(); 2186 return (NULL); 2187 } 2188 2189 2190 /* 2191 * Find an association with the pointer to the inbound IP packet. This can be 2192 * a IPv4 or IPv6 packet. 2193 */ 2194 struct sctp_tcb * 2195 sctp_findassociation_addr(struct mbuf *m, int offset, 2196 struct sockaddr *src, struct sockaddr *dst, 2197 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2198 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2199 { 2200 int find_tcp_pool; 2201 struct sctp_tcb *stcb; 2202 struct sctp_inpcb *inp; 2203 2204 if (sh->v_tag) { 2205 /* we only go down this path if vtag is non-zero */ 2206 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2207 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2208 if (stcb) { 2209 return (stcb); 2210 } 2211 } 2212 find_tcp_pool = 0; 2213 if ((ch->chunk_type != SCTP_INITIATION) && 2214 (ch->chunk_type != SCTP_INITIATION_ACK) && 2215 (ch->chunk_type != SCTP_COOKIE_ACK) && 2216 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2217 /* Other chunk types go to the tcp pool. */ 2218 find_tcp_pool = 1; 2219 } 2220 if (inp_p) { 2221 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2222 find_tcp_pool, vrf_id); 2223 inp = *inp_p; 2224 } else { 2225 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2226 find_tcp_pool, vrf_id); 2227 } 2228 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2229 if (stcb == NULL && inp) { 2230 /* Found a EP but not this address */ 2231 if ((ch->chunk_type == SCTP_INITIATION) || 2232 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2233 /*- 2234 * special hook, we do NOT return linp or an 2235 * association that is linked to an existing 2236 * association that is under the TCP pool (i.e. no 2237 * listener exists). The endpoint finding routine 2238 * will always find a listener before examining the 2239 * TCP pool. 2240 */ 2241 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2242 if (inp_p) { 2243 *inp_p = NULL; 2244 } 2245 return (NULL); 2246 } 2247 stcb = sctp_findassociation_special_addr(m, 2248 offset, sh, &inp, netp, dst); 2249 if (inp_p != NULL) { 2250 *inp_p = inp; 2251 } 2252 } 2253 } 2254 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2255 return (stcb); 2256 } 2257 2258 /* 2259 * lookup an association by an ASCONF lookup address. 2260 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2261 */ 2262 struct sctp_tcb * 2263 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2264 struct sockaddr *dst, struct sctphdr *sh, 2265 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2266 { 2267 struct sctp_tcb *stcb; 2268 struct sockaddr_storage remote_store; 2269 struct sctp_paramhdr parm_buf, *phdr; 2270 int ptype; 2271 int zero_address = 0; 2272 2273 #ifdef INET 2274 struct sockaddr_in *sin; 2275 2276 #endif 2277 #ifdef INET6 2278 struct sockaddr_in6 *sin6; 2279 2280 #endif 2281 2282 memset(&remote_store, 0, sizeof(remote_store)); 2283 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2284 &parm_buf, sizeof(struct sctp_paramhdr)); 2285 if (phdr == NULL) { 2286 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2287 __FUNCTION__); 2288 return NULL; 2289 } 2290 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2291 /* get the correlation address */ 2292 switch (ptype) { 2293 #ifdef INET6 2294 case SCTP_IPV6_ADDRESS: 2295 { 2296 /* ipv6 address param */ 2297 struct sctp_ipv6addr_param *p6, p6_buf; 2298 2299 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2300 return NULL; 2301 } 2302 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2303 offset + sizeof(struct sctp_asconf_chunk), 2304 &p6_buf.ph, sizeof(*p6)); 2305 if (p6 == NULL) { 2306 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2307 __FUNCTION__); 2308 return (NULL); 2309 } 2310 sin6 = (struct sockaddr_in6 *)&remote_store; 2311 sin6->sin6_family = AF_INET6; 2312 sin6->sin6_len = sizeof(*sin6); 2313 sin6->sin6_port = sh->src_port; 2314 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2315 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2316 zero_address = 1; 2317 break; 2318 } 2319 #endif 2320 #ifdef INET 2321 case SCTP_IPV4_ADDRESS: 2322 { 2323 /* ipv4 address param */ 2324 struct sctp_ipv4addr_param *p4, p4_buf; 2325 2326 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2327 return NULL; 2328 } 2329 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2330 offset + sizeof(struct sctp_asconf_chunk), 2331 &p4_buf.ph, sizeof(*p4)); 2332 if (p4 == NULL) { 2333 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2334 __FUNCTION__); 2335 return (NULL); 2336 } 2337 sin = (struct sockaddr_in *)&remote_store; 2338 sin->sin_family = AF_INET; 2339 sin->sin_len = sizeof(*sin); 2340 sin->sin_port = sh->src_port; 2341 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2342 if (sin->sin_addr.s_addr == INADDR_ANY) 2343 zero_address = 1; 2344 break; 2345 } 2346 #endif 2347 default: 2348 /* invalid address param type */ 2349 return NULL; 2350 } 2351 2352 if (zero_address) { 2353 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2354 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2355 if (stcb != NULL) { 2356 SCTP_INP_DECR_REF(*inp_p); 2357 } 2358 } else { 2359 stcb = sctp_findassociation_ep_addr(inp_p, 2360 (struct sockaddr *)&remote_store, netp, 2361 dst, NULL); 2362 } 2363 return (stcb); 2364 } 2365 2366 2367 /* 2368 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2369 * addresses. This way if we don't get a bind we by default pick a ephemeral 2370 * port with all addresses bound. 2371 */ 2372 int 2373 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2374 { 2375 /* 2376 * we get called when a new endpoint starts up. We need to allocate 2377 * the sctp_inpcb structure from the zone and init it. Mark it as 2378 * unbound and find a port that we can use as an ephemeral with 2379 * INADDR_ANY. If the user binds later no problem we can then add in 2380 * the specific addresses. And setup the default parameters for the 2381 * EP. 2382 */ 2383 int i, error; 2384 struct sctp_inpcb *inp; 2385 struct sctp_pcb *m; 2386 struct timeval time; 2387 sctp_sharedkey_t *null_key; 2388 2389 error = 0; 2390 2391 SCTP_INP_INFO_WLOCK(); 2392 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2393 if (inp == NULL) { 2394 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2395 SCTP_INP_INFO_WUNLOCK(); 2396 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2397 return (ENOBUFS); 2398 } 2399 /* zap it */ 2400 bzero(inp, sizeof(*inp)); 2401 2402 /* bump generations */ 2403 /* setup socket pointers */ 2404 inp->sctp_socket = so; 2405 inp->ip_inp.inp.inp_socket = so; 2406 #ifdef INET6 2407 if (INP_SOCKAF(so) == AF_INET6) { 2408 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2409 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2410 } 2411 if (MODULE_GLOBAL(ip6_v6only)) { 2412 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2413 } 2414 } 2415 #endif 2416 inp->sctp_associd_counter = 1; 2417 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2418 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2419 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2420 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2421 /* init the small hash table we use to track asocid <-> tcb */ 2422 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2423 if (inp->sctp_asocidhash == NULL) { 2424 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2425 SCTP_INP_INFO_WUNLOCK(); 2426 return (ENOBUFS); 2427 } 2428 #ifdef IPSEC 2429 { 2430 struct inpcbpolicy *pcb_sp = NULL; 2431 2432 error = ipsec_init_policy(so, &pcb_sp); 2433 /* Arrange to share the policy */ 2434 inp->ip_inp.inp.inp_sp = pcb_sp; 2435 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2436 } 2437 if (error != 0) { 2438 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2439 SCTP_INP_INFO_WUNLOCK(); 2440 return error; 2441 } 2442 #endif /* IPSEC */ 2443 SCTP_INCR_EP_COUNT(); 2444 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2445 SCTP_INP_INFO_WUNLOCK(); 2446 2447 so->so_pcb = (caddr_t)inp; 2448 2449 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2450 /* UDP style socket */ 2451 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2452 SCTP_PCB_FLAGS_UNBOUND); 2453 /* Be sure it is NON-BLOCKING IO for UDP */ 2454 /* SCTP_SET_SO_NBIO(so); */ 2455 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2456 /* TCP style socket */ 2457 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2458 SCTP_PCB_FLAGS_UNBOUND); 2459 /* Be sure we have blocking IO by default */ 2460 SCTP_CLEAR_SO_NBIO(so); 2461 } else { 2462 /* 2463 * unsupported socket type (RAW, etc)- in case we missed it 2464 * in protosw 2465 */ 2466 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2467 so->so_pcb = NULL; 2468 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2469 return (EOPNOTSUPP); 2470 } 2471 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2472 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2473 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2474 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2475 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2476 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2477 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2478 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2479 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2480 } 2481 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2482 &inp->sctp_hashmark); 2483 if (inp->sctp_tcbhash == NULL) { 2484 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2485 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2486 so->so_pcb = NULL; 2487 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2488 return (ENOBUFS); 2489 } 2490 inp->def_vrf_id = vrf_id; 2491 2492 SCTP_INP_INFO_WLOCK(); 2493 SCTP_INP_LOCK_INIT(inp); 2494 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2495 SCTP_INP_READ_INIT(inp); 2496 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2497 /* lock the new ep */ 2498 SCTP_INP_WLOCK(inp); 2499 2500 /* add it to the info area */ 2501 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2502 SCTP_INP_INFO_WUNLOCK(); 2503 2504 TAILQ_INIT(&inp->read_queue); 2505 LIST_INIT(&inp->sctp_addr_list); 2506 2507 LIST_INIT(&inp->sctp_asoc_list); 2508 2509 #ifdef SCTP_TRACK_FREED_ASOCS 2510 /* TEMP CODE */ 2511 LIST_INIT(&inp->sctp_asoc_free_list); 2512 #endif 2513 /* Init the timer structure for signature change */ 2514 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2515 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2516 2517 /* now init the actual endpoint default data */ 2518 m = &inp->sctp_ep; 2519 2520 /* setup the base timeout information */ 2521 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2522 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2523 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2524 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2525 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2526 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2527 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2528 /* all max/min max are in ms */ 2529 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2530 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2531 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2532 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2533 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2534 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2535 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2536 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2537 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2538 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2539 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2540 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2541 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2542 2543 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2544 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2545 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2546 /* number of streams to pre-open on a association */ 2547 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2548 2549 /* Add adaptation cookie */ 2550 m->adaptation_layer_indicator = 0; 2551 m->adaptation_layer_indicator_provided = 0; 2552 2553 /* seed random number generator */ 2554 m->random_counter = 1; 2555 m->store_at = SCTP_SIGNATURE_SIZE; 2556 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2557 sctp_fill_random_store(m); 2558 2559 /* Minimum cookie size */ 2560 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2561 sizeof(struct sctp_state_cookie); 2562 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2563 2564 /* Setup the initial secret */ 2565 (void)SCTP_GETTIME_TIMEVAL(&time); 2566 m->time_of_secret_change = time.tv_sec; 2567 2568 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2569 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2570 } 2571 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2572 2573 /* How long is a cookie good for ? */ 2574 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2575 /* 2576 * Initialize authentication parameters 2577 */ 2578 m->local_hmacs = sctp_default_supported_hmaclist(); 2579 m->local_auth_chunks = sctp_alloc_chunklist(); 2580 m->default_dscp = 0; 2581 #ifdef INET6 2582 m->default_flowlabel = 0; 2583 #endif 2584 m->port = 0; /* encapsulation disabled by default */ 2585 sctp_auth_set_default_chunks(m->local_auth_chunks); 2586 LIST_INIT(&m->shared_keys); 2587 /* add default NULL key as key id 0 */ 2588 null_key = sctp_alloc_sharedkey(); 2589 sctp_insert_sharedkey(&m->shared_keys, null_key); 2590 SCTP_INP_WUNLOCK(inp); 2591 #ifdef SCTP_LOG_CLOSING 2592 sctp_log_closing(inp, NULL, 12); 2593 #endif 2594 return (error); 2595 } 2596 2597 2598 void 2599 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2600 struct sctp_tcb *stcb) 2601 { 2602 struct sctp_nets *net; 2603 uint16_t lport, rport; 2604 struct sctppcbhead *head; 2605 struct sctp_laddr *laddr, *oladdr; 2606 2607 atomic_add_int(&stcb->asoc.refcnt, 1); 2608 SCTP_TCB_UNLOCK(stcb); 2609 SCTP_INP_INFO_WLOCK(); 2610 SCTP_INP_WLOCK(old_inp); 2611 SCTP_INP_WLOCK(new_inp); 2612 SCTP_TCB_LOCK(stcb); 2613 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2614 2615 new_inp->sctp_ep.time_of_secret_change = 2616 old_inp->sctp_ep.time_of_secret_change; 2617 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2618 sizeof(old_inp->sctp_ep.secret_key)); 2619 new_inp->sctp_ep.current_secret_number = 2620 old_inp->sctp_ep.current_secret_number; 2621 new_inp->sctp_ep.last_secret_number = 2622 old_inp->sctp_ep.last_secret_number; 2623 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2624 2625 /* make it so new data pours into the new socket */ 2626 stcb->sctp_socket = new_inp->sctp_socket; 2627 stcb->sctp_ep = new_inp; 2628 2629 /* Copy the port across */ 2630 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2631 rport = stcb->rport; 2632 /* Pull the tcb from the old association */ 2633 LIST_REMOVE(stcb, sctp_tcbhash); 2634 LIST_REMOVE(stcb, sctp_tcblist); 2635 if (stcb->asoc.in_asocid_hash) { 2636 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2637 } 2638 /* Now insert the new_inp into the TCP connected hash */ 2639 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2640 2641 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2642 /* Its safe to access */ 2643 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2644 2645 /* Now move the tcb into the endpoint list */ 2646 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2647 /* 2648 * Question, do we even need to worry about the ep-hash since we 2649 * only have one connection? Probably not :> so lets get rid of it 2650 * and not suck up any kernel memory in that. 2651 */ 2652 if (stcb->asoc.in_asocid_hash) { 2653 struct sctpasochead *lhd; 2654 2655 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2656 new_inp->hashasocidmark)]; 2657 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2658 } 2659 /* Ok. Let's restart timer. */ 2660 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2661 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2662 stcb, net); 2663 } 2664 2665 SCTP_INP_INFO_WUNLOCK(); 2666 if (new_inp->sctp_tcbhash != NULL) { 2667 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2668 new_inp->sctp_tcbhash = NULL; 2669 } 2670 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2671 /* Subset bound, so copy in the laddr list from the old_inp */ 2672 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2673 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2674 if (laddr == NULL) { 2675 /* 2676 * Gak, what can we do? This assoc is really 2677 * HOSED. We probably should send an abort 2678 * here. 2679 */ 2680 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2681 continue; 2682 } 2683 SCTP_INCR_LADDR_COUNT(); 2684 bzero(laddr, sizeof(*laddr)); 2685 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2686 laddr->ifa = oladdr->ifa; 2687 atomic_add_int(&laddr->ifa->refcount, 1); 2688 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2689 sctp_nxt_addr); 2690 new_inp->laddr_count++; 2691 if (oladdr == stcb->asoc.last_used_address) { 2692 stcb->asoc.last_used_address = laddr; 2693 } 2694 } 2695 } 2696 /* 2697 * Now any running timers need to be adjusted since we really don't 2698 * care if they are running or not just blast in the new_inp into 2699 * all of them. 2700 */ 2701 2702 stcb->asoc.dack_timer.ep = (void *)new_inp; 2703 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2704 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2705 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2706 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2707 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2708 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2709 /* now what about the nets? */ 2710 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2711 net->pmtu_timer.ep = (void *)new_inp; 2712 net->hb_timer.ep = (void *)new_inp; 2713 net->rxt_timer.ep = (void *)new_inp; 2714 } 2715 SCTP_INP_WUNLOCK(new_inp); 2716 SCTP_INP_WUNLOCK(old_inp); 2717 } 2718 2719 2720 2721 2722 /* sctp_ifap is used to bypass normal local address validation checks */ 2723 int 2724 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2725 struct sctp_ifa *sctp_ifap, struct thread *p) 2726 { 2727 /* bind a ep to a socket address */ 2728 struct sctppcbhead *head; 2729 struct sctp_inpcb *inp, *inp_tmp; 2730 struct inpcb *ip_inp; 2731 int port_reuse_active = 0; 2732 int bindall; 2733 uint16_t lport; 2734 int error; 2735 uint32_t vrf_id; 2736 2737 lport = 0; 2738 error = 0; 2739 bindall = 1; 2740 inp = (struct sctp_inpcb *)so->so_pcb; 2741 ip_inp = (struct inpcb *)so->so_pcb; 2742 #ifdef SCTP_DEBUG 2743 if (addr) { 2744 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2745 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2746 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2747 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2748 } 2749 #endif 2750 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2751 /* already did a bind, subsequent binds NOT allowed ! */ 2752 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2753 return (EINVAL); 2754 } 2755 #ifdef INVARIANTS 2756 if (p == NULL) 2757 panic("null proc/thread"); 2758 #endif 2759 if (addr != NULL) { 2760 switch (addr->sa_family) { 2761 #ifdef INET 2762 case AF_INET: 2763 { 2764 struct sockaddr_in *sin; 2765 2766 /* IPV6_V6ONLY socket? */ 2767 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2768 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2769 return (EINVAL); 2770 } 2771 if (addr->sa_len != sizeof(*sin)) { 2772 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2773 return (EINVAL); 2774 } 2775 sin = (struct sockaddr_in *)addr; 2776 lport = sin->sin_port; 2777 /* 2778 * For LOOPBACK the prison_local_ip4() call 2779 * will transmute the ip address to the 2780 * proper value. 2781 */ 2782 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2783 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2784 return (error); 2785 } 2786 if (sin->sin_addr.s_addr != INADDR_ANY) { 2787 bindall = 0; 2788 } 2789 break; 2790 } 2791 #endif 2792 #ifdef INET6 2793 case AF_INET6: 2794 { 2795 /* 2796 * Only for pure IPv6 Address. (No IPv4 2797 * Mapped!) 2798 */ 2799 struct sockaddr_in6 *sin6; 2800 2801 sin6 = (struct sockaddr_in6 *)addr; 2802 2803 if (addr->sa_len != sizeof(*sin6)) { 2804 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2805 return (EINVAL); 2806 } 2807 lport = sin6->sin6_port; 2808 /* 2809 * For LOOPBACK the prison_local_ip6() call 2810 * will transmute the ipv6 address to the 2811 * proper value. 2812 */ 2813 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2814 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2815 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2816 return (error); 2817 } 2818 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2819 bindall = 0; 2820 /* KAME hack: embed scopeid */ 2821 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2822 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2823 return (EINVAL); 2824 } 2825 } 2826 /* this must be cleared for ifa_ifwithaddr() */ 2827 sin6->sin6_scope_id = 0; 2828 break; 2829 } 2830 #endif 2831 default: 2832 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2833 return (EAFNOSUPPORT); 2834 } 2835 } 2836 SCTP_INP_INFO_WLOCK(); 2837 SCTP_INP_WLOCK(inp); 2838 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2839 vrf_id = inp->def_vrf_id; 2840 2841 /* increase our count due to the unlock we do */ 2842 SCTP_INP_INCR_REF(inp); 2843 if (lport) { 2844 /* 2845 * Did the caller specify a port? if so we must see if an ep 2846 * already has this one bound. 2847 */ 2848 /* got to be root to get at low ports */ 2849 if (ntohs(lport) < IPPORT_RESERVED) { 2850 if (p && (error = 2851 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2852 )) { 2853 SCTP_INP_DECR_REF(inp); 2854 SCTP_INP_WUNLOCK(inp); 2855 SCTP_INP_INFO_WUNLOCK(); 2856 return (error); 2857 } 2858 } 2859 if (p == NULL) { 2860 SCTP_INP_DECR_REF(inp); 2861 SCTP_INP_WUNLOCK(inp); 2862 SCTP_INP_INFO_WUNLOCK(); 2863 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2864 return (error); 2865 } 2866 SCTP_INP_WUNLOCK(inp); 2867 if (bindall) { 2868 vrf_id = inp->def_vrf_id; 2869 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2870 if (inp_tmp != NULL) { 2871 /* 2872 * lock guy returned and lower count note 2873 * that we are not bound so inp_tmp should 2874 * NEVER be inp. And it is this inp 2875 * (inp_tmp) that gets the reference bump, 2876 * so we must lower it. 2877 */ 2878 SCTP_INP_DECR_REF(inp_tmp); 2879 /* unlock info */ 2880 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2881 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2882 /* 2883 * Ok, must be one-2-one and 2884 * allowing port re-use 2885 */ 2886 port_reuse_active = 1; 2887 goto continue_anyway; 2888 } 2889 SCTP_INP_DECR_REF(inp); 2890 SCTP_INP_INFO_WUNLOCK(); 2891 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2892 return (EADDRINUSE); 2893 } 2894 } else { 2895 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2896 if (inp_tmp != NULL) { 2897 /* 2898 * lock guy returned and lower count note 2899 * that we are not bound so inp_tmp should 2900 * NEVER be inp. And it is this inp 2901 * (inp_tmp) that gets the reference bump, 2902 * so we must lower it. 2903 */ 2904 SCTP_INP_DECR_REF(inp_tmp); 2905 /* unlock info */ 2906 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2907 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2908 /* 2909 * Ok, must be one-2-one and 2910 * allowing port re-use 2911 */ 2912 port_reuse_active = 1; 2913 goto continue_anyway; 2914 } 2915 SCTP_INP_DECR_REF(inp); 2916 SCTP_INP_INFO_WUNLOCK(); 2917 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2918 return (EADDRINUSE); 2919 } 2920 } 2921 continue_anyway: 2922 SCTP_INP_WLOCK(inp); 2923 if (bindall) { 2924 /* verify that no lport is not used by a singleton */ 2925 if ((port_reuse_active == 0) && 2926 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2927 /* Sorry someone already has this one bound */ 2928 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2929 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2930 port_reuse_active = 1; 2931 } else { 2932 SCTP_INP_DECR_REF(inp); 2933 SCTP_INP_WUNLOCK(inp); 2934 SCTP_INP_INFO_WUNLOCK(); 2935 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2936 return (EADDRINUSE); 2937 } 2938 } 2939 } 2940 } else { 2941 uint16_t first, last, candidate; 2942 uint16_t count; 2943 int done; 2944 2945 if (ip_inp->inp_flags & INP_HIGHPORT) { 2946 first = MODULE_GLOBAL(ipport_hifirstauto); 2947 last = MODULE_GLOBAL(ipport_hilastauto); 2948 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2949 if (p && (error = 2950 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2951 )) { 2952 SCTP_INP_DECR_REF(inp); 2953 SCTP_INP_WUNLOCK(inp); 2954 SCTP_INP_INFO_WUNLOCK(); 2955 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2956 return (error); 2957 } 2958 first = MODULE_GLOBAL(ipport_lowfirstauto); 2959 last = MODULE_GLOBAL(ipport_lowlastauto); 2960 } else { 2961 first = MODULE_GLOBAL(ipport_firstauto); 2962 last = MODULE_GLOBAL(ipport_lastauto); 2963 } 2964 if (first > last) { 2965 uint16_t temp; 2966 2967 temp = first; 2968 first = last; 2969 last = temp; 2970 } 2971 count = last - first + 1; /* number of candidates */ 2972 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2973 2974 done = 0; 2975 while (!done) { 2976 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2977 done = 1; 2978 } 2979 if (!done) { 2980 if (--count == 0) { 2981 SCTP_INP_DECR_REF(inp); 2982 SCTP_INP_WUNLOCK(inp); 2983 SCTP_INP_INFO_WUNLOCK(); 2984 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2985 return (EADDRINUSE); 2986 } 2987 if (candidate == last) 2988 candidate = first; 2989 else 2990 candidate = candidate + 1; 2991 } 2992 } 2993 lport = htons(candidate); 2994 } 2995 SCTP_INP_DECR_REF(inp); 2996 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2997 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2998 /* 2999 * this really should not happen. The guy did a non-blocking 3000 * bind and then did a close at the same time. 3001 */ 3002 SCTP_INP_WUNLOCK(inp); 3003 SCTP_INP_INFO_WUNLOCK(); 3004 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3005 return (EINVAL); 3006 } 3007 /* ok we look clear to give out this port, so lets setup the binding */ 3008 if (bindall) { 3009 /* binding to all addresses, so just set in the proper flags */ 3010 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3011 /* set the automatic addr changes from kernel flag */ 3012 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3013 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3014 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3015 } else { 3016 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3017 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3018 } 3019 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3020 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3021 } else { 3022 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3023 } 3024 /* 3025 * set the automatic mobility_base from kernel flag (by 3026 * micchie) 3027 */ 3028 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3029 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3030 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3031 } else { 3032 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3033 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3034 } 3035 /* 3036 * set the automatic mobility_fasthandoff from kernel flag 3037 * (by micchie) 3038 */ 3039 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3040 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3041 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3042 } else { 3043 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3044 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3045 } 3046 } else { 3047 /* 3048 * bind specific, make sure flags is off and add a new 3049 * address structure to the sctp_addr_list inside the ep 3050 * structure. 3051 * 3052 * We will need to allocate one and insert it at the head. The 3053 * socketopt call can just insert new addresses in there as 3054 * well. It will also have to do the embed scope kame hack 3055 * too (before adding). 3056 */ 3057 struct sctp_ifa *ifa; 3058 struct sockaddr_storage store_sa; 3059 3060 memset(&store_sa, 0, sizeof(store_sa)); 3061 switch (addr->sa_family) { 3062 #ifdef INET 3063 case AF_INET: 3064 { 3065 struct sockaddr_in *sin; 3066 3067 sin = (struct sockaddr_in *)&store_sa; 3068 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3069 sin->sin_port = 0; 3070 break; 3071 } 3072 #endif 3073 #ifdef INET6 3074 case AF_INET6: 3075 { 3076 struct sockaddr_in6 *sin6; 3077 3078 sin6 = (struct sockaddr_in6 *)&store_sa; 3079 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3080 sin6->sin6_port = 0; 3081 break; 3082 } 3083 #endif 3084 default: 3085 break; 3086 } 3087 /* 3088 * first find the interface with the bound address need to 3089 * zero out the port to find the address! yuck! can't do 3090 * this earlier since need port for sctp_pcb_findep() 3091 */ 3092 if (sctp_ifap != NULL) { 3093 ifa = sctp_ifap; 3094 } else { 3095 /* 3096 * Note for BSD we hit here always other O/S's will 3097 * pass things in via the sctp_ifap argument 3098 * (Panda). 3099 */ 3100 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3101 vrf_id, SCTP_ADDR_NOT_LOCKED); 3102 } 3103 if (ifa == NULL) { 3104 /* Can't find an interface with that address */ 3105 SCTP_INP_WUNLOCK(inp); 3106 SCTP_INP_INFO_WUNLOCK(); 3107 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3108 return (EADDRNOTAVAIL); 3109 } 3110 #ifdef INET6 3111 if (addr->sa_family == AF_INET6) { 3112 /* GAK, more FIXME IFA lock? */ 3113 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3114 /* Can't bind a non-existent addr. */ 3115 SCTP_INP_WUNLOCK(inp); 3116 SCTP_INP_INFO_WUNLOCK(); 3117 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3118 return (EINVAL); 3119 } 3120 } 3121 #endif 3122 /* we're not bound all */ 3123 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3124 /* allow bindx() to send ASCONF's for binding changes */ 3125 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3126 /* clear automatic addr changes from kernel flag */ 3127 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3128 3129 /* add this address to the endpoint list */ 3130 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3131 if (error != 0) { 3132 SCTP_INP_WUNLOCK(inp); 3133 SCTP_INP_INFO_WUNLOCK(); 3134 return (error); 3135 } 3136 inp->laddr_count++; 3137 } 3138 /* find the bucket */ 3139 if (port_reuse_active) { 3140 /* Put it into tcp 1-2-1 hash */ 3141 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3142 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3143 } else { 3144 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3145 } 3146 /* put it in the bucket */ 3147 LIST_INSERT_HEAD(head, inp, sctp_hash); 3148 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3149 (void *)head, ntohs(lport), port_reuse_active); 3150 /* set in the port */ 3151 inp->sctp_lport = lport; 3152 3153 /* turn off just the unbound flag */ 3154 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3155 SCTP_INP_WUNLOCK(inp); 3156 SCTP_INP_INFO_WUNLOCK(); 3157 return (0); 3158 } 3159 3160 3161 static void 3162 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3163 { 3164 struct sctp_iterator *it, *nit; 3165 3166 /* 3167 * We enter with the only the ITERATOR_LOCK in place and a write 3168 * lock on the inp_info stuff. 3169 */ 3170 it = sctp_it_ctl.cur_it; 3171 if (it && (it->vn != curvnet)) { 3172 /* Its not looking at our VNET */ 3173 return; 3174 } 3175 if (it && (it->inp == inp)) { 3176 /* 3177 * This is tricky and we hold the iterator lock, but when it 3178 * returns and gets the lock (when we release it) the 3179 * iterator will try to operate on inp. We need to stop that 3180 * from happening. But of course the iterator has a 3181 * reference on the stcb and inp. We can mark it and it will 3182 * stop. 3183 * 3184 * If its a single iterator situation, we set the end iterator 3185 * flag. Otherwise we set the iterator to go to the next 3186 * inp. 3187 * 3188 */ 3189 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3190 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3191 } else { 3192 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3193 } 3194 } 3195 /* 3196 * Now go through and remove any single reference to our inp that 3197 * may be still pending on the list 3198 */ 3199 SCTP_IPI_ITERATOR_WQ_LOCK(); 3200 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3201 if (it->vn != curvnet) { 3202 continue; 3203 } 3204 if (it->inp == inp) { 3205 /* This one points to me is it inp specific? */ 3206 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3207 /* Remove and free this one */ 3208 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3209 it, sctp_nxt_itr); 3210 if (it->function_atend != NULL) { 3211 (*it->function_atend) (it->pointer, it->val); 3212 } 3213 SCTP_FREE(it, SCTP_M_ITER); 3214 } else { 3215 it->inp = LIST_NEXT(it->inp, sctp_list); 3216 if (it->inp) { 3217 SCTP_INP_INCR_REF(it->inp); 3218 } 3219 } 3220 /* 3221 * When its put in the refcnt is incremented so decr 3222 * it 3223 */ 3224 SCTP_INP_DECR_REF(inp); 3225 } 3226 } 3227 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3228 } 3229 3230 /* release sctp_inpcb unbind the port */ 3231 void 3232 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3233 { 3234 /* 3235 * Here we free a endpoint. We must find it (if it is in the Hash 3236 * table) and remove it from there. Then we must also find it in the 3237 * overall list and remove it from there. After all removals are 3238 * complete then any timer has to be stopped. Then start the actual 3239 * freeing. a) Any local lists. b) Any associations. c) The hash of 3240 * all associations. d) finally the ep itself. 3241 */ 3242 struct sctp_tcb *asoc, *nasoc; 3243 struct sctp_laddr *laddr, *nladdr; 3244 struct inpcb *ip_pcb; 3245 struct socket *so; 3246 int being_refed = 0; 3247 struct sctp_queued_to_read *sq, *nsq; 3248 int cnt; 3249 sctp_sharedkey_t *shared_key, *nshared_key; 3250 3251 3252 #ifdef SCTP_LOG_CLOSING 3253 sctp_log_closing(inp, NULL, 0); 3254 #endif 3255 SCTP_ITERATOR_LOCK(); 3256 /* mark any iterators on the list or being processed */ 3257 sctp_iterator_inp_being_freed(inp); 3258 SCTP_ITERATOR_UNLOCK(); 3259 so = inp->sctp_socket; 3260 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3261 /* been here before.. eeks.. get out of here */ 3262 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3263 #ifdef SCTP_LOG_CLOSING 3264 sctp_log_closing(inp, NULL, 1); 3265 #endif 3266 return; 3267 } 3268 SCTP_ASOC_CREATE_LOCK(inp); 3269 SCTP_INP_INFO_WLOCK(); 3270 3271 SCTP_INP_WLOCK(inp); 3272 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3273 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3274 /* socket is gone, so no more wakeups allowed */ 3275 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3276 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3277 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3278 3279 } 3280 /* First time through we have the socket lock, after that no more. */ 3281 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3282 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3283 3284 if (inp->control) { 3285 sctp_m_freem(inp->control); 3286 inp->control = NULL; 3287 } 3288 if (inp->pkt) { 3289 sctp_m_freem(inp->pkt); 3290 inp->pkt = NULL; 3291 } 3292 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3293 * here but I will be nice :> (i.e. 3294 * ip_pcb = ep;) */ 3295 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3296 int cnt_in_sd; 3297 3298 cnt_in_sd = 0; 3299 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3300 SCTP_TCB_LOCK(asoc); 3301 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3302 /* Skip guys being freed */ 3303 cnt_in_sd++; 3304 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3305 /* 3306 * Special case - we did not start a 3307 * kill timer on the asoc due to it 3308 * was not closed. So go ahead and 3309 * start it now. 3310 */ 3311 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3312 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3313 } 3314 SCTP_TCB_UNLOCK(asoc); 3315 continue; 3316 } 3317 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3318 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3319 (asoc->asoc.total_output_queue_size == 0)) { 3320 /* 3321 * If we have data in queue, we don't want 3322 * to just free since the app may have done, 3323 * send()/close or connect/send/close. And 3324 * it wants the data to get across first. 3325 */ 3326 /* Just abandon things in the front states */ 3327 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3328 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3329 cnt_in_sd++; 3330 } 3331 continue; 3332 } 3333 /* Disconnect the socket please */ 3334 asoc->sctp_socket = NULL; 3335 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3336 if ((asoc->asoc.size_on_reasm_queue > 0) || 3337 (asoc->asoc.control_pdapi) || 3338 (asoc->asoc.size_on_all_streams > 0) || 3339 (so && (so->so_rcv.sb_cc > 0))) { 3340 /* Left with Data unread */ 3341 struct mbuf *op_err; 3342 3343 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3344 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3345 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3346 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3347 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3348 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3349 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3350 } 3351 if (sctp_free_assoc(inp, asoc, 3352 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3353 cnt_in_sd++; 3354 } 3355 continue; 3356 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3357 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3358 (asoc->asoc.stream_queue_cnt == 0)) { 3359 if (asoc->asoc.locked_on_sending) { 3360 goto abort_anyway; 3361 } 3362 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3363 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3364 struct sctp_nets *netp; 3365 3366 /* 3367 * there is nothing queued to send, 3368 * so I send shutdown 3369 */ 3370 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3371 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3372 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3373 } 3374 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3375 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3376 sctp_stop_timers_for_shutdown(asoc); 3377 if (asoc->asoc.alternate) { 3378 netp = asoc->asoc.alternate; 3379 } else { 3380 netp = asoc->asoc.primary_destination; 3381 } 3382 sctp_send_shutdown(asoc, netp); 3383 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3384 netp); 3385 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3386 asoc->asoc.primary_destination); 3387 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3388 } 3389 } else { 3390 /* mark into shutdown pending */ 3391 struct sctp_stream_queue_pending *sp; 3392 3393 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3394 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3395 asoc->asoc.primary_destination); 3396 if (asoc->asoc.locked_on_sending) { 3397 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3398 sctp_streamhead); 3399 if (sp == NULL) { 3400 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3401 (void *)asoc->asoc.locked_on_sending, 3402 asoc->asoc.locked_on_sending->stream_no); 3403 } else { 3404 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3405 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3406 } 3407 } 3408 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3409 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3410 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3411 struct mbuf *op_err; 3412 3413 abort_anyway: 3414 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3415 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3416 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3417 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3418 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3419 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3420 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3421 } 3422 if (sctp_free_assoc(inp, asoc, 3423 SCTP_PCBFREE_NOFORCE, 3424 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3425 cnt_in_sd++; 3426 } 3427 continue; 3428 } else { 3429 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3430 } 3431 } 3432 cnt_in_sd++; 3433 SCTP_TCB_UNLOCK(asoc); 3434 } 3435 /* now is there some left in our SHUTDOWN state? */ 3436 if (cnt_in_sd) { 3437 #ifdef SCTP_LOG_CLOSING 3438 sctp_log_closing(inp, NULL, 2); 3439 #endif 3440 inp->sctp_socket = NULL; 3441 SCTP_INP_WUNLOCK(inp); 3442 SCTP_ASOC_CREATE_UNLOCK(inp); 3443 SCTP_INP_INFO_WUNLOCK(); 3444 return; 3445 } 3446 } 3447 inp->sctp_socket = NULL; 3448 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3449 SCTP_PCB_FLAGS_UNBOUND) { 3450 /* 3451 * ok, this guy has been bound. It's port is somewhere in 3452 * the SCTP_BASE_INFO(hash table). Remove it! 3453 */ 3454 LIST_REMOVE(inp, sctp_hash); 3455 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3456 } 3457 /* 3458 * If there is a timer running to kill us, forget it, since it may 3459 * have a contest on the INP lock.. which would cause us to die ... 3460 */ 3461 cnt = 0; 3462 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3463 SCTP_TCB_LOCK(asoc); 3464 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3465 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3466 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3467 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3468 } 3469 cnt++; 3470 SCTP_TCB_UNLOCK(asoc); 3471 continue; 3472 } 3473 /* Free associations that are NOT killing us */ 3474 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3475 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3476 struct mbuf *op_err; 3477 3478 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3479 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3480 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3481 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3482 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3483 cnt++; 3484 SCTP_TCB_UNLOCK(asoc); 3485 continue; 3486 } 3487 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3488 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3489 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3490 } 3491 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3492 cnt++; 3493 } 3494 } 3495 if (cnt) { 3496 /* Ok we have someone out there that will kill us */ 3497 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3498 #ifdef SCTP_LOG_CLOSING 3499 sctp_log_closing(inp, NULL, 3); 3500 #endif 3501 SCTP_INP_WUNLOCK(inp); 3502 SCTP_ASOC_CREATE_UNLOCK(inp); 3503 SCTP_INP_INFO_WUNLOCK(); 3504 return; 3505 } 3506 if (SCTP_INP_LOCK_CONTENDED(inp)) 3507 being_refed++; 3508 if (SCTP_INP_READ_CONTENDED(inp)) 3509 being_refed++; 3510 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3511 being_refed++; 3512 3513 if ((inp->refcount) || 3514 (being_refed) || 3515 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3516 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3517 #ifdef SCTP_LOG_CLOSING 3518 sctp_log_closing(inp, NULL, 4); 3519 #endif 3520 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3521 SCTP_INP_WUNLOCK(inp); 3522 SCTP_ASOC_CREATE_UNLOCK(inp); 3523 SCTP_INP_INFO_WUNLOCK(); 3524 return; 3525 } 3526 inp->sctp_ep.signature_change.type = 0; 3527 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3528 /* 3529 * Remove it from the list .. last thing we need a lock for. 3530 */ 3531 LIST_REMOVE(inp, sctp_list); 3532 SCTP_INP_WUNLOCK(inp); 3533 SCTP_ASOC_CREATE_UNLOCK(inp); 3534 SCTP_INP_INFO_WUNLOCK(); 3535 /* 3536 * Now we release all locks. Since this INP cannot be found anymore 3537 * except possibly by the kill timer that might be running. We call 3538 * the drain function here. It should hit the case were it sees the 3539 * ACTIVE flag cleared and exit out freeing us to proceed and 3540 * destroy everything. 3541 */ 3542 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3543 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3544 } else { 3545 /* Probably un-needed */ 3546 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3547 } 3548 3549 #ifdef SCTP_LOG_CLOSING 3550 sctp_log_closing(inp, NULL, 5); 3551 #endif 3552 3553 3554 if ((inp->sctp_asocidhash) != NULL) { 3555 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3556 inp->sctp_asocidhash = NULL; 3557 } 3558 /* sa_ignore FREED_MEMORY */ 3559 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3560 /* Its only abandoned if it had data left */ 3561 if (sq->length) 3562 SCTP_STAT_INCR(sctps_left_abandon); 3563 3564 TAILQ_REMOVE(&inp->read_queue, sq, next); 3565 sctp_free_remote_addr(sq->whoFrom); 3566 if (so) 3567 so->so_rcv.sb_cc -= sq->length; 3568 if (sq->data) { 3569 sctp_m_freem(sq->data); 3570 sq->data = NULL; 3571 } 3572 /* 3573 * no need to free the net count, since at this point all 3574 * assoc's are gone. 3575 */ 3576 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3577 SCTP_DECR_READQ_COUNT(); 3578 } 3579 /* Now the sctp_pcb things */ 3580 /* 3581 * free each asoc if it is not already closed/free. we can't use the 3582 * macro here since le_next will get freed as part of the 3583 * sctp_free_assoc() call. 3584 */ 3585 if (so) { 3586 #ifdef IPSEC 3587 ipsec_delete_pcbpolicy(ip_pcb); 3588 #endif /* IPSEC */ 3589 3590 /* Unlocks not needed since the socket is gone now */ 3591 } 3592 if (ip_pcb->inp_options) { 3593 (void)sctp_m_free(ip_pcb->inp_options); 3594 ip_pcb->inp_options = 0; 3595 } 3596 #ifdef INET6 3597 if (ip_pcb->inp_vflag & INP_IPV6) { 3598 struct in6pcb *in6p; 3599 3600 in6p = (struct in6pcb *)inp; 3601 ip6_freepcbopts(in6p->in6p_outputopts); 3602 } 3603 #endif /* INET6 */ 3604 ip_pcb->inp_vflag = 0; 3605 /* free up authentication fields */ 3606 if (inp->sctp_ep.local_auth_chunks != NULL) 3607 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3608 if (inp->sctp_ep.local_hmacs != NULL) 3609 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3610 3611 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3612 LIST_REMOVE(shared_key, next); 3613 sctp_free_sharedkey(shared_key); 3614 /* sa_ignore FREED_MEMORY */ 3615 } 3616 3617 /* 3618 * if we have an address list the following will free the list of 3619 * ifaddr's that are set into this ep. Again macro limitations here, 3620 * since the LIST_FOREACH could be a bad idea. 3621 */ 3622 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3623 sctp_remove_laddr(laddr); 3624 } 3625 3626 #ifdef SCTP_TRACK_FREED_ASOCS 3627 /* TEMP CODE */ 3628 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3629 LIST_REMOVE(asoc, sctp_tcblist); 3630 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3631 SCTP_DECR_ASOC_COUNT(); 3632 } 3633 /* *** END TEMP CODE *** */ 3634 #endif 3635 /* Now lets see about freeing the EP hash table. */ 3636 if (inp->sctp_tcbhash != NULL) { 3637 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3638 inp->sctp_tcbhash = NULL; 3639 } 3640 /* Now we must put the ep memory back into the zone pool */ 3641 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3642 SCTP_INP_LOCK_DESTROY(inp); 3643 SCTP_INP_READ_DESTROY(inp); 3644 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3645 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3646 SCTP_DECR_EP_COUNT(); 3647 } 3648 3649 3650 struct sctp_nets * 3651 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3652 { 3653 struct sctp_nets *net; 3654 3655 /* locate the address */ 3656 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3657 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3658 return (net); 3659 } 3660 return (NULL); 3661 } 3662 3663 3664 int 3665 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3666 { 3667 struct sctp_ifa *sctp_ifa; 3668 3669 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3670 if (sctp_ifa) { 3671 return (1); 3672 } else { 3673 return (0); 3674 } 3675 } 3676 3677 /* 3678 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3679 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3680 * stats of stuff. 3681 */ 3682 int 3683 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3684 struct sctp_nets **netp, int set_scope, int from) 3685 { 3686 /* 3687 * The following is redundant to the same lines in the 3688 * sctp_aloc_assoc() but is needed since others call the add address 3689 * function 3690 */ 3691 struct sctp_nets *net, *netfirst; 3692 int addr_inscope; 3693 3694 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3695 from); 3696 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3697 3698 netfirst = sctp_findnet(stcb, newaddr); 3699 if (netfirst) { 3700 /* 3701 * Lie and return ok, we don't want to make the association 3702 * go away for this behavior. It will happen in the TCP 3703 * model in a connected socket. It does not reach the hash 3704 * table until after the association is built so it can't be 3705 * found. Mark as reachable, since the initial creation will 3706 * have been cleared and the NOT_IN_ASSOC flag will have 3707 * been added... and we don't want to end up removing it 3708 * back out. 3709 */ 3710 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3711 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3712 SCTP_ADDR_UNCONFIRMED); 3713 } else { 3714 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3715 } 3716 3717 return (0); 3718 } 3719 addr_inscope = 1; 3720 switch (newaddr->sa_family) { 3721 #ifdef INET 3722 case AF_INET: 3723 { 3724 struct sockaddr_in *sin; 3725 3726 sin = (struct sockaddr_in *)newaddr; 3727 if (sin->sin_addr.s_addr == 0) { 3728 /* Invalid address */ 3729 return (-1); 3730 } 3731 /* zero out the bzero area */ 3732 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3733 3734 /* assure len is set */ 3735 sin->sin_len = sizeof(struct sockaddr_in); 3736 if (set_scope) { 3737 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3738 stcb->asoc.scope.ipv4_local_scope = 1; 3739 #else 3740 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3741 stcb->asoc.scope.ipv4_local_scope = 1; 3742 } 3743 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3744 } else { 3745 /* Validate the address is in scope */ 3746 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3747 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3748 addr_inscope = 0; 3749 } 3750 } 3751 break; 3752 } 3753 #endif 3754 #ifdef INET6 3755 case AF_INET6: 3756 { 3757 struct sockaddr_in6 *sin6; 3758 3759 sin6 = (struct sockaddr_in6 *)newaddr; 3760 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3761 /* Invalid address */ 3762 return (-1); 3763 } 3764 /* assure len is set */ 3765 sin6->sin6_len = sizeof(struct sockaddr_in6); 3766 if (set_scope) { 3767 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3768 stcb->asoc.scope.loopback_scope = 1; 3769 stcb->asoc.scope.local_scope = 0; 3770 stcb->asoc.scope.ipv4_local_scope = 1; 3771 stcb->asoc.scope.site_scope = 1; 3772 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3773 /* 3774 * If the new destination is a 3775 * LINK_LOCAL we must have common 3776 * site scope. Don't set the local 3777 * scope since we may not share all 3778 * links, only loopback can do this. 3779 * Links on the local network would 3780 * also be on our private network 3781 * for v4 too. 3782 */ 3783 stcb->asoc.scope.ipv4_local_scope = 1; 3784 stcb->asoc.scope.site_scope = 1; 3785 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3786 /* 3787 * If the new destination is 3788 * SITE_LOCAL then we must have site 3789 * scope in common. 3790 */ 3791 stcb->asoc.scope.site_scope = 1; 3792 } 3793 } else { 3794 /* Validate the address is in scope */ 3795 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3796 (stcb->asoc.scope.loopback_scope == 0)) { 3797 addr_inscope = 0; 3798 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3799 (stcb->asoc.scope.local_scope == 0)) { 3800 addr_inscope = 0; 3801 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3802 (stcb->asoc.scope.site_scope == 0)) { 3803 addr_inscope = 0; 3804 } 3805 } 3806 break; 3807 } 3808 #endif 3809 default: 3810 /* not supported family type */ 3811 return (-1); 3812 } 3813 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3814 if (net == NULL) { 3815 return (-1); 3816 } 3817 SCTP_INCR_RADDR_COUNT(); 3818 bzero(net, sizeof(struct sctp_nets)); 3819 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3820 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3821 switch (newaddr->sa_family) { 3822 #ifdef INET 3823 case AF_INET: 3824 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3825 break; 3826 #endif 3827 #ifdef INET6 3828 case AF_INET6: 3829 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3830 break; 3831 #endif 3832 default: 3833 break; 3834 } 3835 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3836 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3837 stcb->asoc.scope.loopback_scope = 1; 3838 stcb->asoc.scope.ipv4_local_scope = 1; 3839 stcb->asoc.scope.local_scope = 0; 3840 stcb->asoc.scope.site_scope = 1; 3841 addr_inscope = 1; 3842 } 3843 net->failure_threshold = stcb->asoc.def_net_failure; 3844 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3845 if (addr_inscope == 0) { 3846 net->dest_state = (SCTP_ADDR_REACHABLE | 3847 SCTP_ADDR_OUT_OF_SCOPE); 3848 } else { 3849 if (from == SCTP_ADDR_IS_CONFIRMED) 3850 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3851 net->dest_state = SCTP_ADDR_REACHABLE; 3852 else 3853 net->dest_state = SCTP_ADDR_REACHABLE | 3854 SCTP_ADDR_UNCONFIRMED; 3855 } 3856 /* 3857 * We set this to 0, the timer code knows that this means its an 3858 * initial value 3859 */ 3860 net->rto_needed = 1; 3861 net->RTO = 0; 3862 net->RTO_measured = 0; 3863 stcb->asoc.numnets++; 3864 net->ref_count = 1; 3865 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3866 net->port = stcb->asoc.port; 3867 net->dscp = stcb->asoc.default_dscp; 3868 #ifdef INET6 3869 net->flowlabel = stcb->asoc.default_flowlabel; 3870 #endif 3871 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3872 net->dest_state |= SCTP_ADDR_NOHB; 3873 } else { 3874 net->dest_state &= ~SCTP_ADDR_NOHB; 3875 } 3876 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3877 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3878 } else { 3879 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3880 } 3881 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3882 /* Init the timer structure */ 3883 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3884 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3885 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3886 3887 /* Now generate a route for this guy */ 3888 #ifdef INET6 3889 /* KAME hack: embed scopeid */ 3890 if (newaddr->sa_family == AF_INET6) { 3891 struct sockaddr_in6 *sin6; 3892 3893 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3894 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3895 sin6->sin6_scope_id = 0; 3896 } 3897 #endif 3898 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3899 3900 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3901 /* Get source address */ 3902 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3903 stcb, 3904 (sctp_route_t *) & net->ro, 3905 net, 3906 0, 3907 stcb->asoc.vrf_id); 3908 /* Now get the interface MTU */ 3909 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3910 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3911 } 3912 if (net->mtu > 0) { 3913 uint32_t rmtu; 3914 3915 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3916 if (rmtu == 0) { 3917 /* 3918 * Start things off to match mtu of 3919 * interface please. 3920 */ 3921 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3922 net->ro.ro_rt, net->mtu); 3923 } else { 3924 /* 3925 * we take the route mtu over the interface, 3926 * since the route may be leading out the 3927 * loopback, or a different interface. 3928 */ 3929 net->mtu = rmtu; 3930 } 3931 } 3932 } 3933 if (net->mtu == 0) { 3934 switch (newaddr->sa_family) { 3935 #ifdef INET 3936 case AF_INET: 3937 net->mtu = SCTP_DEFAULT_MTU; 3938 break; 3939 #endif 3940 #ifdef INET6 3941 case AF_INET6: 3942 net->mtu = 1280; 3943 break; 3944 #endif 3945 default: 3946 break; 3947 } 3948 } 3949 if (net->port) { 3950 net->mtu -= (uint32_t) sizeof(struct udphdr); 3951 } 3952 if (from == SCTP_ALLOC_ASOC) { 3953 stcb->asoc.smallest_mtu = net->mtu; 3954 } 3955 if (stcb->asoc.smallest_mtu > net->mtu) { 3956 stcb->asoc.smallest_mtu = net->mtu; 3957 } 3958 #ifdef INET6 3959 if (newaddr->sa_family == AF_INET6) { 3960 struct sockaddr_in6 *sin6; 3961 3962 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3963 (void)sa6_recoverscope(sin6); 3964 } 3965 #endif 3966 3967 /* JRS - Use the congestion control given in the CC module */ 3968 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 3969 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 3970 3971 /* 3972 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3973 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3974 */ 3975 net->find_pseudo_cumack = 1; 3976 net->find_rtx_pseudo_cumack = 1; 3977 net->src_addr_selected = 0; 3978 /* Choose an initial flowid. */ 3979 net->flowid = stcb->asoc.my_vtag ^ 3980 ntohs(stcb->rport) ^ 3981 ntohs(stcb->sctp_ep->sctp_lport); 3982 #ifdef INVARIANTS 3983 net->flowidset = 1; 3984 #endif 3985 if (netp) { 3986 *netp = net; 3987 } 3988 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3989 if (net->ro.ro_rt == NULL) { 3990 /* Since we have no route put it at the back */ 3991 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3992 } else if (netfirst == NULL) { 3993 /* We are the first one in the pool. */ 3994 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3995 } else if (netfirst->ro.ro_rt == NULL) { 3996 /* 3997 * First one has NO route. Place this one ahead of the first 3998 * one. 3999 */ 4000 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4001 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4002 /* 4003 * This one has a different interface than the one at the 4004 * top of the list. Place it ahead. 4005 */ 4006 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4007 } else { 4008 /* 4009 * Ok we have the same interface as the first one. Move 4010 * forward until we find either a) one with a NULL route... 4011 * insert ahead of that b) one with a different ifp.. insert 4012 * after that. c) end of the list.. insert at the tail. 4013 */ 4014 struct sctp_nets *netlook; 4015 4016 do { 4017 netlook = TAILQ_NEXT(netfirst, sctp_next); 4018 if (netlook == NULL) { 4019 /* End of the list */ 4020 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4021 break; 4022 } else if (netlook->ro.ro_rt == NULL) { 4023 /* next one has NO route */ 4024 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4025 break; 4026 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4027 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4028 net, sctp_next); 4029 break; 4030 } 4031 /* Shift forward */ 4032 netfirst = netlook; 4033 } while (netlook != NULL); 4034 } 4035 4036 /* got to have a primary set */ 4037 if (stcb->asoc.primary_destination == 0) { 4038 stcb->asoc.primary_destination = net; 4039 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4040 (net->ro.ro_rt) && 4041 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4042 /* No route to current primary adopt new primary */ 4043 stcb->asoc.primary_destination = net; 4044 } 4045 /* Validate primary is first */ 4046 net = TAILQ_FIRST(&stcb->asoc.nets); 4047 if ((net != stcb->asoc.primary_destination) && 4048 (stcb->asoc.primary_destination)) { 4049 /* 4050 * first one on the list is NOT the primary sctp_cmpaddr() 4051 * is much more efficient if the primary is the first on the 4052 * list, make it so. 4053 */ 4054 TAILQ_REMOVE(&stcb->asoc.nets, 4055 stcb->asoc.primary_destination, sctp_next); 4056 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4057 stcb->asoc.primary_destination, sctp_next); 4058 } 4059 return (0); 4060 } 4061 4062 4063 static uint32_t 4064 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4065 { 4066 uint32_t id; 4067 struct sctpasochead *head; 4068 struct sctp_tcb *lstcb; 4069 4070 SCTP_INP_WLOCK(inp); 4071 try_again: 4072 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4073 /* TSNH */ 4074 SCTP_INP_WUNLOCK(inp); 4075 return (0); 4076 } 4077 /* 4078 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4079 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4080 */ 4081 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4082 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4083 } 4084 id = inp->sctp_associd_counter; 4085 inp->sctp_associd_counter++; 4086 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4087 if (lstcb) { 4088 goto try_again; 4089 } 4090 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4091 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4092 stcb->asoc.in_asocid_hash = 1; 4093 SCTP_INP_WUNLOCK(inp); 4094 return id; 4095 } 4096 4097 /* 4098 * allocate an association and add it to the endpoint. The caller must be 4099 * careful to add all additional addresses once they are know right away or 4100 * else the assoc will be may experience a blackout scenario. 4101 */ 4102 struct sctp_tcb * 4103 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4104 int *error, uint32_t override_tag, uint32_t vrf_id, 4105 struct thread *p 4106 ) 4107 { 4108 /* note the p argument is only valid in unbound sockets */ 4109 4110 struct sctp_tcb *stcb; 4111 struct sctp_association *asoc; 4112 struct sctpasochead *head; 4113 uint16_t rport; 4114 int err; 4115 4116 /* 4117 * Assumption made here: Caller has done a 4118 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4119 * address does not exist already. 4120 */ 4121 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4122 /* Hit max assoc, sorry no more */ 4123 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4124 *error = ENOBUFS; 4125 return (NULL); 4126 } 4127 if (firstaddr == NULL) { 4128 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4129 *error = EINVAL; 4130 return (NULL); 4131 } 4132 SCTP_INP_RLOCK(inp); 4133 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4134 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4135 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4136 /* 4137 * If its in the TCP pool, its NOT allowed to create an 4138 * association. The parent listener needs to call 4139 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4140 * off, or connected one does this.. its an error. 4141 */ 4142 SCTP_INP_RUNLOCK(inp); 4143 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4144 *error = EINVAL; 4145 return (NULL); 4146 } 4147 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4148 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4149 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4150 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4151 SCTP_INP_RUNLOCK(inp); 4152 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4153 *error = EINVAL; 4154 return (NULL); 4155 } 4156 } 4157 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4158 #ifdef SCTP_DEBUG 4159 if (firstaddr) { 4160 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4161 switch (firstaddr->sa_family) { 4162 #ifdef INET 4163 case AF_INET: 4164 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4165 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4166 break; 4167 #endif 4168 #ifdef INET6 4169 case AF_INET6: 4170 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4171 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4172 break; 4173 #endif 4174 default: 4175 break; 4176 } 4177 } else { 4178 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4179 } 4180 #endif /* SCTP_DEBUG */ 4181 switch (firstaddr->sa_family) { 4182 #ifdef INET 4183 case AF_INET: 4184 { 4185 struct sockaddr_in *sin; 4186 4187 sin = (struct sockaddr_in *)firstaddr; 4188 if ((ntohs(sin->sin_port) == 0) || 4189 (sin->sin_addr.s_addr == INADDR_ANY) || 4190 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4191 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4192 /* Invalid address */ 4193 SCTP_INP_RUNLOCK(inp); 4194 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4195 *error = EINVAL; 4196 return (NULL); 4197 } 4198 rport = sin->sin_port; 4199 break; 4200 } 4201 #endif 4202 #ifdef INET6 4203 case AF_INET6: 4204 { 4205 struct sockaddr_in6 *sin6; 4206 4207 sin6 = (struct sockaddr_in6 *)firstaddr; 4208 if ((ntohs(sin6->sin6_port) == 0) || 4209 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4210 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4211 /* Invalid address */ 4212 SCTP_INP_RUNLOCK(inp); 4213 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4214 *error = EINVAL; 4215 return (NULL); 4216 } 4217 rport = sin6->sin6_port; 4218 break; 4219 } 4220 #endif 4221 default: 4222 /* not supported family type */ 4223 SCTP_INP_RUNLOCK(inp); 4224 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4225 *error = EINVAL; 4226 return (NULL); 4227 } 4228 SCTP_INP_RUNLOCK(inp); 4229 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4230 /* 4231 * If you have not performed a bind, then we need to do the 4232 * ephemeral bind for you. 4233 */ 4234 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4235 (struct sockaddr *)NULL, 4236 (struct sctp_ifa *)NULL, 4237 p 4238 ))) { 4239 /* bind error, probably perm */ 4240 *error = err; 4241 return (NULL); 4242 } 4243 } 4244 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4245 if (stcb == NULL) { 4246 /* out of memory? */ 4247 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4248 *error = ENOMEM; 4249 return (NULL); 4250 } 4251 SCTP_INCR_ASOC_COUNT(); 4252 4253 bzero(stcb, sizeof(*stcb)); 4254 asoc = &stcb->asoc; 4255 4256 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4257 SCTP_TCB_LOCK_INIT(stcb); 4258 SCTP_TCB_SEND_LOCK_INIT(stcb); 4259 stcb->rport = rport; 4260 /* setup back pointer's */ 4261 stcb->sctp_ep = inp; 4262 stcb->sctp_socket = inp->sctp_socket; 4263 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4264 /* failed */ 4265 SCTP_TCB_LOCK_DESTROY(stcb); 4266 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4267 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4268 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4269 SCTP_DECR_ASOC_COUNT(); 4270 *error = err; 4271 return (NULL); 4272 } 4273 /* and the port */ 4274 SCTP_INP_INFO_WLOCK(); 4275 SCTP_INP_WLOCK(inp); 4276 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4277 /* inpcb freed while alloc going on */ 4278 SCTP_TCB_LOCK_DESTROY(stcb); 4279 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4280 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4281 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4282 SCTP_INP_WUNLOCK(inp); 4283 SCTP_INP_INFO_WUNLOCK(); 4284 SCTP_DECR_ASOC_COUNT(); 4285 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4286 *error = EINVAL; 4287 return (NULL); 4288 } 4289 SCTP_TCB_LOCK(stcb); 4290 4291 /* now that my_vtag is set, add it to the hash */ 4292 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4293 /* put it in the bucket in the vtag hash of assoc's for the system */ 4294 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4295 SCTP_INP_INFO_WUNLOCK(); 4296 4297 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4298 /* failure.. memory error? */ 4299 if (asoc->strmout) { 4300 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4301 asoc->strmout = NULL; 4302 } 4303 if (asoc->mapping_array) { 4304 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4305 asoc->mapping_array = NULL; 4306 } 4307 if (asoc->nr_mapping_array) { 4308 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4309 asoc->nr_mapping_array = NULL; 4310 } 4311 SCTP_DECR_ASOC_COUNT(); 4312 SCTP_TCB_UNLOCK(stcb); 4313 SCTP_TCB_LOCK_DESTROY(stcb); 4314 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4315 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4316 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4317 SCTP_INP_WUNLOCK(inp); 4318 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4319 *error = ENOBUFS; 4320 return (NULL); 4321 } 4322 /* Init all the timers */ 4323 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4324 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4325 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4326 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4327 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4328 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4329 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4330 4331 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4332 /* now file the port under the hash as well */ 4333 if (inp->sctp_tcbhash != NULL) { 4334 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4335 inp->sctp_hashmark)]; 4336 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4337 } 4338 SCTP_INP_WUNLOCK(inp); 4339 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4340 return (stcb); 4341 } 4342 4343 4344 void 4345 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4346 { 4347 struct sctp_association *asoc; 4348 4349 asoc = &stcb->asoc; 4350 asoc->numnets--; 4351 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4352 if (net == asoc->primary_destination) { 4353 /* Reset primary */ 4354 struct sctp_nets *lnet; 4355 4356 lnet = TAILQ_FIRST(&asoc->nets); 4357 /* 4358 * Mobility adaptation Ideally, if deleted destination is 4359 * the primary, it becomes a fast retransmission trigger by 4360 * the subsequent SET PRIMARY. (by micchie) 4361 */ 4362 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4363 SCTP_MOBILITY_BASE) || 4364 sctp_is_mobility_feature_on(stcb->sctp_ep, 4365 SCTP_MOBILITY_FASTHANDOFF)) { 4366 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4367 if (asoc->deleted_primary != NULL) { 4368 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4369 goto out; 4370 } 4371 asoc->deleted_primary = net; 4372 atomic_add_int(&net->ref_count, 1); 4373 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4374 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4375 sctp_mobility_feature_on(stcb->sctp_ep, 4376 SCTP_MOBILITY_PRIM_DELETED); 4377 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4378 stcb->sctp_ep, stcb, NULL); 4379 } 4380 out: 4381 /* Try to find a confirmed primary */ 4382 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4383 } 4384 if (net == asoc->last_data_chunk_from) { 4385 /* Reset primary */ 4386 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4387 } 4388 if (net == asoc->last_control_chunk_from) { 4389 /* Clear net */ 4390 asoc->last_control_chunk_from = NULL; 4391 } 4392 if (net == stcb->asoc.alternate) { 4393 sctp_free_remote_addr(stcb->asoc.alternate); 4394 stcb->asoc.alternate = NULL; 4395 } 4396 sctp_free_remote_addr(net); 4397 } 4398 4399 /* 4400 * remove a remote endpoint address from an association, it will fail if the 4401 * address does not exist. 4402 */ 4403 int 4404 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4405 { 4406 /* 4407 * Here we need to remove a remote address. This is quite simple, we 4408 * first find it in the list of address for the association 4409 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4410 * on that item. Note we do not allow it to be removed if there are 4411 * no other addresses. 4412 */ 4413 struct sctp_association *asoc; 4414 struct sctp_nets *net, *nnet; 4415 4416 asoc = &stcb->asoc; 4417 4418 /* locate the address */ 4419 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4420 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4421 continue; 4422 } 4423 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4424 remaddr)) { 4425 /* we found the guy */ 4426 if (asoc->numnets < 2) { 4427 /* Must have at LEAST two remote addresses */ 4428 return (-1); 4429 } else { 4430 sctp_remove_net(stcb, net); 4431 return (0); 4432 } 4433 } 4434 } 4435 /* not found. */ 4436 return (-2); 4437 } 4438 4439 void 4440 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4441 { 4442 struct sctpvtaghead *chain; 4443 struct sctp_tagblock *twait_block; 4444 int found = 0; 4445 int i; 4446 4447 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4448 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4449 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4450 if ((twait_block->vtag_block[i].v_tag == tag) && 4451 (twait_block->vtag_block[i].lport == lport) && 4452 (twait_block->vtag_block[i].rport == rport)) { 4453 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4454 twait_block->vtag_block[i].v_tag = 0; 4455 twait_block->vtag_block[i].lport = 0; 4456 twait_block->vtag_block[i].rport = 0; 4457 found = 1; 4458 break; 4459 } 4460 } 4461 if (found) 4462 break; 4463 } 4464 } 4465 4466 int 4467 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4468 { 4469 struct sctpvtaghead *chain; 4470 struct sctp_tagblock *twait_block; 4471 int found = 0; 4472 int i; 4473 4474 SCTP_INP_INFO_WLOCK(); 4475 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4476 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4477 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4478 if ((twait_block->vtag_block[i].v_tag == tag) && 4479 (twait_block->vtag_block[i].lport == lport) && 4480 (twait_block->vtag_block[i].rport == rport)) { 4481 found = 1; 4482 break; 4483 } 4484 } 4485 if (found) 4486 break; 4487 } 4488 SCTP_INP_INFO_WUNLOCK(); 4489 return (found); 4490 } 4491 4492 4493 void 4494 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4495 { 4496 struct sctpvtaghead *chain; 4497 struct sctp_tagblock *twait_block; 4498 struct timeval now; 4499 int set, i; 4500 4501 if (time == 0) { 4502 /* Its disabled */ 4503 return; 4504 } 4505 (void)SCTP_GETTIME_TIMEVAL(&now); 4506 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4507 set = 0; 4508 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4509 /* Block(s) present, lets find space, and expire on the fly */ 4510 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4511 if ((twait_block->vtag_block[i].v_tag == 0) && 4512 !set) { 4513 twait_block->vtag_block[i].tv_sec_at_expire = 4514 now.tv_sec + time; 4515 twait_block->vtag_block[i].v_tag = tag; 4516 twait_block->vtag_block[i].lport = lport; 4517 twait_block->vtag_block[i].rport = rport; 4518 set = 1; 4519 } else if ((twait_block->vtag_block[i].v_tag) && 4520 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4521 /* Audit expires this guy */ 4522 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4523 twait_block->vtag_block[i].v_tag = 0; 4524 twait_block->vtag_block[i].lport = 0; 4525 twait_block->vtag_block[i].rport = 0; 4526 if (set == 0) { 4527 /* Reuse it for my new tag */ 4528 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4529 twait_block->vtag_block[i].v_tag = tag; 4530 twait_block->vtag_block[i].lport = lport; 4531 twait_block->vtag_block[i].rport = rport; 4532 set = 1; 4533 } 4534 } 4535 } 4536 if (set) { 4537 /* 4538 * We only do up to the block where we can place our 4539 * tag for audits 4540 */ 4541 break; 4542 } 4543 } 4544 /* Need to add a new block to chain */ 4545 if (!set) { 4546 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4547 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4548 if (twait_block == NULL) { 4549 #ifdef INVARIANTS 4550 panic("Can not alloc tagblock"); 4551 #endif 4552 return; 4553 } 4554 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4555 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4556 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4557 twait_block->vtag_block[0].v_tag = tag; 4558 twait_block->vtag_block[0].lport = lport; 4559 twait_block->vtag_block[0].rport = rport; 4560 } 4561 } 4562 4563 4564 4565 /*- 4566 * Free the association after un-hashing the remote port. This 4567 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4568 * expect that the input to this function IS a locked TCB. 4569 * It will return 0, if it did NOT destroy the association (instead 4570 * it unlocks it. It will return NON-zero if it either destroyed the 4571 * association OR the association is already destroyed. 4572 */ 4573 int 4574 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4575 { 4576 int i; 4577 struct sctp_association *asoc; 4578 struct sctp_nets *net, *nnet; 4579 struct sctp_laddr *laddr, *naddr; 4580 struct sctp_tmit_chunk *chk, *nchk; 4581 struct sctp_asconf_addr *aparam, *naparam; 4582 struct sctp_asconf_ack *aack, *naack; 4583 struct sctp_stream_reset_list *strrst, *nstrrst; 4584 struct sctp_queued_to_read *sq, *nsq; 4585 struct sctp_stream_queue_pending *sp, *nsp; 4586 sctp_sharedkey_t *shared_key, *nshared_key; 4587 struct socket *so; 4588 4589 /* first, lets purge the entry from the hash table. */ 4590 4591 #ifdef SCTP_LOG_CLOSING 4592 sctp_log_closing(inp, stcb, 6); 4593 #endif 4594 if (stcb->asoc.state == 0) { 4595 #ifdef SCTP_LOG_CLOSING 4596 sctp_log_closing(inp, NULL, 7); 4597 #endif 4598 /* there is no asoc, really TSNH :-0 */ 4599 return (1); 4600 } 4601 if (stcb->asoc.alternate) { 4602 sctp_free_remote_addr(stcb->asoc.alternate); 4603 stcb->asoc.alternate = NULL; 4604 } 4605 /* TEMP CODE */ 4606 if (stcb->freed_from_where == 0) { 4607 /* Only record the first place free happened from */ 4608 stcb->freed_from_where = from_location; 4609 } 4610 /* TEMP CODE */ 4611 4612 asoc = &stcb->asoc; 4613 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4614 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4615 /* nothing around */ 4616 so = NULL; 4617 else 4618 so = inp->sctp_socket; 4619 4620 /* 4621 * We used timer based freeing if a reader or writer is in the way. 4622 * So we first check if we are actually being called from a timer, 4623 * if so we abort early if a reader or writer is still in the way. 4624 */ 4625 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4626 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4627 /* 4628 * is it the timer driving us? if so are the reader/writers 4629 * gone? 4630 */ 4631 if (stcb->asoc.refcnt) { 4632 /* nope, reader or writer in the way */ 4633 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4634 /* no asoc destroyed */ 4635 SCTP_TCB_UNLOCK(stcb); 4636 #ifdef SCTP_LOG_CLOSING 4637 sctp_log_closing(inp, stcb, 8); 4638 #endif 4639 return (0); 4640 } 4641 } 4642 /* now clean up any other timers */ 4643 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4644 asoc->dack_timer.self = NULL; 4645 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4646 /*- 4647 * For stream reset we don't blast this unless 4648 * it is a str-reset timer, it might be the 4649 * free-asoc timer which we DON'T want to 4650 * disturb. 4651 */ 4652 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4653 asoc->strreset_timer.self = NULL; 4654 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4655 asoc->asconf_timer.self = NULL; 4656 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4657 asoc->autoclose_timer.self = NULL; 4658 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4659 asoc->shut_guard_timer.self = NULL; 4660 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4661 asoc->delayed_event_timer.self = NULL; 4662 /* Mobility adaptation */ 4663 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4664 asoc->delete_prim_timer.self = NULL; 4665 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4666 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4667 net->rxt_timer.self = NULL; 4668 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4669 net->pmtu_timer.self = NULL; 4670 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4671 net->hb_timer.self = NULL; 4672 } 4673 /* Now the read queue needs to be cleaned up (only once) */ 4674 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4675 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4676 SCTP_INP_READ_LOCK(inp); 4677 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4678 if (sq->stcb == stcb) { 4679 sq->do_not_ref_stcb = 1; 4680 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4681 /* 4682 * If there is no end, there never will be 4683 * now. 4684 */ 4685 if (sq->end_added == 0) { 4686 /* Held for PD-API clear that. */ 4687 sq->pdapi_aborted = 1; 4688 sq->held_length = 0; 4689 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4690 /* 4691 * Need to add a PD-API 4692 * aborted indication. 4693 * Setting the control_pdapi 4694 * assures that it will be 4695 * added right after this 4696 * msg. 4697 */ 4698 uint32_t strseq; 4699 4700 stcb->asoc.control_pdapi = sq; 4701 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4702 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4703 stcb, 4704 SCTP_PARTIAL_DELIVERY_ABORTED, 4705 (void *)&strseq, 4706 SCTP_SO_LOCKED); 4707 stcb->asoc.control_pdapi = NULL; 4708 } 4709 } 4710 /* Add an end to wake them */ 4711 sq->end_added = 1; 4712 } 4713 } 4714 SCTP_INP_READ_UNLOCK(inp); 4715 if (stcb->block_entry) { 4716 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4717 stcb->block_entry->error = ECONNRESET; 4718 stcb->block_entry = NULL; 4719 } 4720 } 4721 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4722 /* 4723 * Someone holds a reference OR the socket is unaccepted 4724 * yet. 4725 */ 4726 if ((stcb->asoc.refcnt) || 4727 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4728 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4729 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4730 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4731 } 4732 SCTP_TCB_UNLOCK(stcb); 4733 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4734 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4735 /* nothing around */ 4736 so = NULL; 4737 if (so) { 4738 /* Wake any reader/writers */ 4739 sctp_sorwakeup(inp, so); 4740 sctp_sowwakeup(inp, so); 4741 } 4742 #ifdef SCTP_LOG_CLOSING 4743 sctp_log_closing(inp, stcb, 9); 4744 #endif 4745 /* no asoc destroyed */ 4746 return (0); 4747 } 4748 #ifdef SCTP_LOG_CLOSING 4749 sctp_log_closing(inp, stcb, 10); 4750 #endif 4751 /* 4752 * When I reach here, no others want to kill the assoc yet.. and I 4753 * own the lock. Now its possible an abort comes in when I do the 4754 * lock exchange below to grab all the locks to do the final take 4755 * out. to prevent this we increment the count, which will start a 4756 * timer and blow out above thus assuring us that we hold exclusive 4757 * killing of the asoc. Note that after getting back the TCB lock we 4758 * will go ahead and increment the counter back up and stop any 4759 * timer a passing stranger may have started :-S 4760 */ 4761 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4762 atomic_add_int(&stcb->asoc.refcnt, 1); 4763 4764 SCTP_TCB_UNLOCK(stcb); 4765 SCTP_INP_INFO_WLOCK(); 4766 SCTP_INP_WLOCK(inp); 4767 SCTP_TCB_LOCK(stcb); 4768 } 4769 /* Double check the GONE flag */ 4770 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4771 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4772 /* nothing around */ 4773 so = NULL; 4774 4775 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4776 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4777 /* 4778 * For TCP type we need special handling when we are 4779 * connected. We also include the peel'ed off ones to. 4780 */ 4781 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4782 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4783 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4784 if (so) { 4785 SOCK_LOCK(so); 4786 if (so->so_rcv.sb_cc == 0) { 4787 so->so_state &= ~(SS_ISCONNECTING | 4788 SS_ISDISCONNECTING | 4789 SS_ISCONFIRMING | 4790 SS_ISCONNECTED); 4791 } 4792 socantrcvmore_locked(so); 4793 sctp_sowwakeup(inp, so); 4794 sctp_sorwakeup(inp, so); 4795 SCTP_SOWAKEUP(so); 4796 } 4797 } 4798 } 4799 /* 4800 * Make it invalid too, that way if its about to run it will abort 4801 * and return. 4802 */ 4803 /* re-increment the lock */ 4804 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4805 atomic_add_int(&stcb->asoc.refcnt, -1); 4806 } 4807 if (stcb->asoc.refcnt) { 4808 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4809 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4810 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4811 SCTP_INP_INFO_WUNLOCK(); 4812 SCTP_INP_WUNLOCK(inp); 4813 } 4814 SCTP_TCB_UNLOCK(stcb); 4815 return (0); 4816 } 4817 asoc->state = 0; 4818 if (inp->sctp_tcbhash) { 4819 LIST_REMOVE(stcb, sctp_tcbhash); 4820 } 4821 if (stcb->asoc.in_asocid_hash) { 4822 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4823 } 4824 /* Now lets remove it from the list of ALL associations in the EP */ 4825 LIST_REMOVE(stcb, sctp_tcblist); 4826 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4827 SCTP_INP_INCR_REF(inp); 4828 SCTP_INP_WUNLOCK(inp); 4829 } 4830 /* pull from vtag hash */ 4831 LIST_REMOVE(stcb, sctp_asocs); 4832 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4833 inp->sctp_lport, stcb->rport); 4834 4835 /* 4836 * Now restop the timers to be sure this is paranoia at is finest! 4837 */ 4838 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4839 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4840 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4841 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4842 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4843 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4844 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4845 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4846 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4847 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4848 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4849 } 4850 4851 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4852 /* 4853 * The chunk lists and such SHOULD be empty but we check them just 4854 * in case. 4855 */ 4856 /* anything on the wheel needs to be removed */ 4857 for (i = 0; i < asoc->streamoutcnt; i++) { 4858 struct sctp_stream_out *outs; 4859 4860 outs = &asoc->strmout[i]; 4861 /* now clean up any chunks here */ 4862 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4863 TAILQ_REMOVE(&outs->outqueue, sp, next); 4864 sctp_free_spbufspace(stcb, asoc, sp); 4865 if (sp->data) { 4866 if (so) { 4867 /* Still an open socket - report */ 4868 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4869 0, (void *)sp, SCTP_SO_LOCKED); 4870 } 4871 if (sp->data) { 4872 sctp_m_freem(sp->data); 4873 sp->data = NULL; 4874 sp->tail_mbuf = NULL; 4875 sp->length = 0; 4876 } 4877 } 4878 if (sp->net) { 4879 sctp_free_remote_addr(sp->net); 4880 sp->net = NULL; 4881 } 4882 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4883 } 4884 } 4885 /* sa_ignore FREED_MEMORY */ 4886 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4887 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4888 SCTP_FREE(strrst, SCTP_M_STRESET); 4889 } 4890 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4891 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4892 if (sq->data) { 4893 sctp_m_freem(sq->data); 4894 sq->data = NULL; 4895 } 4896 sctp_free_remote_addr(sq->whoFrom); 4897 sq->whoFrom = NULL; 4898 sq->stcb = NULL; 4899 /* Free the ctl entry */ 4900 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4901 SCTP_DECR_READQ_COUNT(); 4902 /* sa_ignore FREED_MEMORY */ 4903 } 4904 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4905 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4906 if (chk->data) { 4907 sctp_m_freem(chk->data); 4908 chk->data = NULL; 4909 } 4910 if (chk->holds_key_ref) 4911 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4912 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4913 SCTP_DECR_CHK_COUNT(); 4914 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4915 asoc->free_chunk_cnt--; 4916 /* sa_ignore FREED_MEMORY */ 4917 } 4918 /* pending send queue SHOULD be empty */ 4919 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4920 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4921 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4922 #ifdef INVARIANTS 4923 } else { 4924 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4925 #endif 4926 } 4927 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4928 if (chk->data) { 4929 if (so) { 4930 /* Still a socket? */ 4931 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4932 0, chk, SCTP_SO_LOCKED); 4933 } 4934 if (chk->data) { 4935 sctp_m_freem(chk->data); 4936 chk->data = NULL; 4937 } 4938 } 4939 if (chk->holds_key_ref) 4940 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4941 if (chk->whoTo) { 4942 sctp_free_remote_addr(chk->whoTo); 4943 chk->whoTo = NULL; 4944 } 4945 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4946 SCTP_DECR_CHK_COUNT(); 4947 /* sa_ignore FREED_MEMORY */ 4948 } 4949 /* sent queue SHOULD be empty */ 4950 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4951 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 4952 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4953 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4954 #ifdef INVARIANTS 4955 } else { 4956 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4957 #endif 4958 } 4959 } 4960 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4961 if (chk->data) { 4962 if (so) { 4963 /* Still a socket? */ 4964 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 4965 0, chk, SCTP_SO_LOCKED); 4966 } 4967 if (chk->data) { 4968 sctp_m_freem(chk->data); 4969 chk->data = NULL; 4970 } 4971 } 4972 if (chk->holds_key_ref) 4973 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4974 sctp_free_remote_addr(chk->whoTo); 4975 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4976 SCTP_DECR_CHK_COUNT(); 4977 /* sa_ignore FREED_MEMORY */ 4978 } 4979 #ifdef INVARIANTS 4980 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 4981 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 4982 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 4983 } 4984 } 4985 #endif 4986 /* control queue MAY not be empty */ 4987 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 4988 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4989 if (chk->data) { 4990 sctp_m_freem(chk->data); 4991 chk->data = NULL; 4992 } 4993 if (chk->holds_key_ref) 4994 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4995 sctp_free_remote_addr(chk->whoTo); 4996 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4997 SCTP_DECR_CHK_COUNT(); 4998 /* sa_ignore FREED_MEMORY */ 4999 } 5000 /* ASCONF queue MAY not be empty */ 5001 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5002 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5003 if (chk->data) { 5004 sctp_m_freem(chk->data); 5005 chk->data = NULL; 5006 } 5007 if (chk->holds_key_ref) 5008 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5009 sctp_free_remote_addr(chk->whoTo); 5010 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5011 SCTP_DECR_CHK_COUNT(); 5012 /* sa_ignore FREED_MEMORY */ 5013 } 5014 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5015 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5016 if (chk->data) { 5017 sctp_m_freem(chk->data); 5018 chk->data = NULL; 5019 } 5020 if (chk->holds_key_ref) 5021 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5022 sctp_free_remote_addr(chk->whoTo); 5023 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5024 SCTP_DECR_CHK_COUNT(); 5025 /* sa_ignore FREED_MEMORY */ 5026 } 5027 5028 if (asoc->mapping_array) { 5029 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5030 asoc->mapping_array = NULL; 5031 } 5032 if (asoc->nr_mapping_array) { 5033 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5034 asoc->nr_mapping_array = NULL; 5035 } 5036 /* the stream outs */ 5037 if (asoc->strmout) { 5038 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5039 asoc->strmout = NULL; 5040 } 5041 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5042 if (asoc->strmin) { 5043 struct sctp_queued_to_read *ctl, *nctl; 5044 5045 for (i = 0; i < asoc->streamincnt; i++) { 5046 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5047 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5048 sctp_free_remote_addr(ctl->whoFrom); 5049 if (ctl->data) { 5050 sctp_m_freem(ctl->data); 5051 ctl->data = NULL; 5052 } 5053 /* 5054 * We don't free the address here since all 5055 * the net's were freed above. 5056 */ 5057 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5058 SCTP_DECR_READQ_COUNT(); 5059 } 5060 } 5061 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5062 asoc->strmin = NULL; 5063 } 5064 asoc->streamincnt = 0; 5065 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5066 #ifdef INVARIANTS 5067 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5068 panic("no net's left alloc'ed, or list points to itself"); 5069 } 5070 #endif 5071 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5072 sctp_free_remote_addr(net); 5073 } 5074 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5075 /* sa_ignore FREED_MEMORY */ 5076 sctp_remove_laddr(laddr); 5077 } 5078 5079 /* pending asconf (address) parameters */ 5080 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5081 /* sa_ignore FREED_MEMORY */ 5082 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5083 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5084 } 5085 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5086 /* sa_ignore FREED_MEMORY */ 5087 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5088 if (aack->data != NULL) { 5089 sctp_m_freem(aack->data); 5090 } 5091 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5092 } 5093 /* clean up auth stuff */ 5094 if (asoc->local_hmacs) 5095 sctp_free_hmaclist(asoc->local_hmacs); 5096 if (asoc->peer_hmacs) 5097 sctp_free_hmaclist(asoc->peer_hmacs); 5098 5099 if (asoc->local_auth_chunks) 5100 sctp_free_chunklist(asoc->local_auth_chunks); 5101 if (asoc->peer_auth_chunks) 5102 sctp_free_chunklist(asoc->peer_auth_chunks); 5103 5104 sctp_free_authinfo(&asoc->authinfo); 5105 5106 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5107 LIST_REMOVE(shared_key, next); 5108 sctp_free_sharedkey(shared_key); 5109 /* sa_ignore FREED_MEMORY */ 5110 } 5111 5112 /* Insert new items here :> */ 5113 5114 /* Get rid of LOCK */ 5115 SCTP_TCB_UNLOCK(stcb); 5116 SCTP_TCB_LOCK_DESTROY(stcb); 5117 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5118 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5119 SCTP_INP_INFO_WUNLOCK(); 5120 SCTP_INP_RLOCK(inp); 5121 } 5122 #ifdef SCTP_TRACK_FREED_ASOCS 5123 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5124 /* now clean up the tasoc itself */ 5125 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5126 SCTP_DECR_ASOC_COUNT(); 5127 } else { 5128 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5129 } 5130 #else 5131 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5132 SCTP_DECR_ASOC_COUNT(); 5133 #endif 5134 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5135 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5136 /* 5137 * If its NOT the inp_free calling us AND sctp_close 5138 * as been called, we call back... 5139 */ 5140 SCTP_INP_RUNLOCK(inp); 5141 /* 5142 * This will start the kill timer (if we are the 5143 * last one) since we hold an increment yet. But 5144 * this is the only safe way to do this since 5145 * otherwise if the socket closes at the same time 5146 * we are here we might collide in the cleanup. 5147 */ 5148 sctp_inpcb_free(inp, 5149 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5150 SCTP_CALLED_DIRECTLY_NOCMPSET); 5151 SCTP_INP_DECR_REF(inp); 5152 goto out_of; 5153 } else { 5154 /* The socket is still open. */ 5155 SCTP_INP_DECR_REF(inp); 5156 } 5157 } 5158 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5159 SCTP_INP_RUNLOCK(inp); 5160 } 5161 out_of: 5162 /* destroyed the asoc */ 5163 #ifdef SCTP_LOG_CLOSING 5164 sctp_log_closing(inp, NULL, 11); 5165 #endif 5166 return (1); 5167 } 5168 5169 5170 5171 /* 5172 * determine if a destination is "reachable" based upon the addresses bound 5173 * to the current endpoint (e.g. only v4 or v6 currently bound) 5174 */ 5175 /* 5176 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5177 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5178 * types bound as its endpoint 5179 */ 5180 int 5181 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5182 { 5183 struct sctp_inpcb *inp; 5184 int answer; 5185 5186 /* 5187 * No locks here, the TCB, in all cases is already locked and an 5188 * assoc is up. There is either a INP lock by the caller applied (in 5189 * asconf case when deleting an address) or NOT in the HB case, 5190 * however if HB then the INP increment is up and the INP will not 5191 * be removed (on top of the fact that we have a TCB lock). So we 5192 * only want to read the sctp_flags, which is either bound-all or 5193 * not.. no protection needed since once an assoc is up you can't be 5194 * changing your binding. 5195 */ 5196 inp = stcb->sctp_ep; 5197 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5198 /* if bound all, destination is not restricted */ 5199 /* 5200 * RRS: Question during lock work: Is this correct? If you 5201 * are bound-all you still might need to obey the V4--V6 5202 * flags??? IMO this bound-all stuff needs to be removed! 5203 */ 5204 return (1); 5205 } 5206 /* NOTE: all "scope" checks are done when local addresses are added */ 5207 switch (destaddr->sa_family) { 5208 #ifdef INET6 5209 case AF_INET6: 5210 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5211 break; 5212 #endif 5213 #ifdef INET 5214 case AF_INET: 5215 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5216 break; 5217 #endif 5218 default: 5219 /* invalid family, so it's unreachable */ 5220 answer = 0; 5221 break; 5222 } 5223 return (answer); 5224 } 5225 5226 /* 5227 * update the inp_vflags on an endpoint 5228 */ 5229 static void 5230 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5231 { 5232 struct sctp_laddr *laddr; 5233 5234 /* first clear the flag */ 5235 inp->ip_inp.inp.inp_vflag = 0; 5236 /* set the flag based on addresses on the ep list */ 5237 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5238 if (laddr->ifa == NULL) { 5239 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5240 __FUNCTION__); 5241 continue; 5242 } 5243 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5244 continue; 5245 } 5246 switch (laddr->ifa->address.sa.sa_family) { 5247 #ifdef INET6 5248 case AF_INET6: 5249 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5250 break; 5251 #endif 5252 #ifdef INET 5253 case AF_INET: 5254 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5255 break; 5256 #endif 5257 default: 5258 break; 5259 } 5260 } 5261 } 5262 5263 /* 5264 * Add the address to the endpoint local address list There is nothing to be 5265 * done if we are bound to all addresses 5266 */ 5267 void 5268 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5269 { 5270 struct sctp_laddr *laddr; 5271 int fnd, error = 0; 5272 5273 fnd = 0; 5274 5275 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5276 /* You are already bound to all. You have it already */ 5277 return; 5278 } 5279 #ifdef INET6 5280 if (ifa->address.sa.sa_family == AF_INET6) { 5281 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5282 /* Can't bind a non-useable addr. */ 5283 return; 5284 } 5285 } 5286 #endif 5287 /* first, is it already present? */ 5288 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5289 if (laddr->ifa == ifa) { 5290 fnd = 1; 5291 break; 5292 } 5293 } 5294 5295 if (fnd == 0) { 5296 /* Not in the ep list */ 5297 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5298 if (error != 0) 5299 return; 5300 inp->laddr_count++; 5301 /* update inp_vflag flags */ 5302 switch (ifa->address.sa.sa_family) { 5303 #ifdef INET6 5304 case AF_INET6: 5305 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5306 break; 5307 #endif 5308 #ifdef INET 5309 case AF_INET: 5310 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5311 break; 5312 #endif 5313 default: 5314 break; 5315 } 5316 } 5317 return; 5318 } 5319 5320 5321 /* 5322 * select a new (hopefully reachable) destination net (should only be used 5323 * when we deleted an ep addr that is the only usable source address to reach 5324 * the destination net) 5325 */ 5326 static void 5327 sctp_select_primary_destination(struct sctp_tcb *stcb) 5328 { 5329 struct sctp_nets *net; 5330 5331 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5332 /* for now, we'll just pick the first reachable one we find */ 5333 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5334 continue; 5335 if (sctp_destination_is_reachable(stcb, 5336 (struct sockaddr *)&net->ro._l_addr)) { 5337 /* found a reachable destination */ 5338 stcb->asoc.primary_destination = net; 5339 } 5340 } 5341 /* I can't there from here! ...we're gonna die shortly... */ 5342 } 5343 5344 5345 /* 5346 * Delete the address from the endpoint local address list There is nothing 5347 * to be done if we are bound to all addresses 5348 */ 5349 void 5350 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5351 { 5352 struct sctp_laddr *laddr; 5353 int fnd; 5354 5355 fnd = 0; 5356 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5357 /* You are already bound to all. You have it already */ 5358 return; 5359 } 5360 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5361 if (laddr->ifa == ifa) { 5362 fnd = 1; 5363 break; 5364 } 5365 } 5366 if (fnd && (inp->laddr_count < 2)) { 5367 /* can't delete unless there are at LEAST 2 addresses */ 5368 return; 5369 } 5370 if (fnd) { 5371 /* 5372 * clean up any use of this address go through our 5373 * associations and clear any last_used_address that match 5374 * this one for each assoc, see if a new primary_destination 5375 * is needed 5376 */ 5377 struct sctp_tcb *stcb; 5378 5379 /* clean up "next_addr_touse" */ 5380 if (inp->next_addr_touse == laddr) 5381 /* delete this address */ 5382 inp->next_addr_touse = NULL; 5383 5384 /* clean up "last_used_address" */ 5385 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5386 struct sctp_nets *net; 5387 5388 SCTP_TCB_LOCK(stcb); 5389 if (stcb->asoc.last_used_address == laddr) 5390 /* delete this address */ 5391 stcb->asoc.last_used_address = NULL; 5392 /* 5393 * Now spin through all the nets and purge any ref 5394 * to laddr 5395 */ 5396 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5397 if (net->ro._s_addr && 5398 (net->ro._s_addr->ifa == laddr->ifa)) { 5399 /* Yep, purge src address selected */ 5400 sctp_rtentry_t *rt; 5401 5402 /* delete this address if cached */ 5403 rt = net->ro.ro_rt; 5404 if (rt != NULL) { 5405 RTFREE(rt); 5406 net->ro.ro_rt = NULL; 5407 } 5408 sctp_free_ifa(net->ro._s_addr); 5409 net->ro._s_addr = NULL; 5410 net->src_addr_selected = 0; 5411 } 5412 } 5413 SCTP_TCB_UNLOCK(stcb); 5414 } /* for each tcb */ 5415 /* remove it from the ep list */ 5416 sctp_remove_laddr(laddr); 5417 inp->laddr_count--; 5418 /* update inp_vflag flags */ 5419 sctp_update_ep_vflag(inp); 5420 } 5421 return; 5422 } 5423 5424 /* 5425 * Add the address to the TCB local address restricted list. 5426 * This is a "pending" address list (eg. addresses waiting for an 5427 * ASCONF-ACK response) and cannot be used as a valid source address. 5428 */ 5429 void 5430 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5431 { 5432 struct sctp_laddr *laddr; 5433 struct sctpladdr *list; 5434 5435 /* 5436 * Assumes TCB is locked.. and possibly the INP. May need to 5437 * confirm/fix that if we need it and is not the case. 5438 */ 5439 list = &stcb->asoc.sctp_restricted_addrs; 5440 5441 #ifdef INET6 5442 if (ifa->address.sa.sa_family == AF_INET6) { 5443 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5444 /* Can't bind a non-existent addr. */ 5445 return; 5446 } 5447 } 5448 #endif 5449 /* does the address already exist? */ 5450 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5451 if (laddr->ifa == ifa) { 5452 return; 5453 } 5454 } 5455 5456 /* add to the list */ 5457 (void)sctp_insert_laddr(list, ifa, 0); 5458 return; 5459 } 5460 5461 /* 5462 * insert an laddr entry with the given ifa for the desired list 5463 */ 5464 int 5465 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5466 { 5467 struct sctp_laddr *laddr; 5468 5469 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5470 if (laddr == NULL) { 5471 /* out of memory? */ 5472 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5473 return (EINVAL); 5474 } 5475 SCTP_INCR_LADDR_COUNT(); 5476 bzero(laddr, sizeof(*laddr)); 5477 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5478 laddr->ifa = ifa; 5479 laddr->action = act; 5480 atomic_add_int(&ifa->refcount, 1); 5481 /* insert it */ 5482 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5483 5484 return (0); 5485 } 5486 5487 /* 5488 * Remove an laddr entry from the local address list (on an assoc) 5489 */ 5490 void 5491 sctp_remove_laddr(struct sctp_laddr *laddr) 5492 { 5493 5494 /* remove from the list */ 5495 LIST_REMOVE(laddr, sctp_nxt_addr); 5496 sctp_free_ifa(laddr->ifa); 5497 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5498 SCTP_DECR_LADDR_COUNT(); 5499 } 5500 5501 /* 5502 * Remove a local address from the TCB local address restricted list 5503 */ 5504 void 5505 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5506 { 5507 struct sctp_inpcb *inp; 5508 struct sctp_laddr *laddr; 5509 5510 /* 5511 * This is called by asconf work. It is assumed that a) The TCB is 5512 * locked and b) The INP is locked. This is true in as much as I can 5513 * trace through the entry asconf code where I did these locks. 5514 * Again, the ASCONF code is a bit different in that it does lock 5515 * the INP during its work often times. This must be since we don't 5516 * want other proc's looking up things while what they are looking 5517 * up is changing :-D 5518 */ 5519 5520 inp = stcb->sctp_ep; 5521 /* if subset bound and don't allow ASCONF's, can't delete last */ 5522 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5523 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5524 if (stcb->sctp_ep->laddr_count < 2) { 5525 /* can't delete last address */ 5526 return; 5527 } 5528 } 5529 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5530 /* remove the address if it exists */ 5531 if (laddr->ifa == NULL) 5532 continue; 5533 if (laddr->ifa == ifa) { 5534 sctp_remove_laddr(laddr); 5535 return; 5536 } 5537 } 5538 5539 /* address not found! */ 5540 return; 5541 } 5542 5543 /* 5544 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5545 */ 5546 /* sysctl */ 5547 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5548 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5549 5550 5551 5552 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5553 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5554 int *sctp_cpuarry = NULL; 5555 void 5556 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5557 { 5558 /* Queue a packet to a processor for the specified core */ 5559 struct sctp_mcore_queue *qent; 5560 struct sctp_mcore_ctrl *wkq; 5561 int need_wake = 0; 5562 5563 if (sctp_mcore_workers == NULL) { 5564 /* Something went way bad during setup */ 5565 sctp_input_with_port(m, off, 0); 5566 return; 5567 } 5568 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5569 (sizeof(struct sctp_mcore_queue)), 5570 SCTP_M_MCORE); 5571 if (qent == NULL) { 5572 /* This is trouble */ 5573 sctp_input_with_port(m, off, 0); 5574 return; 5575 } 5576 qent->vn = curvnet; 5577 qent->m = m; 5578 qent->off = off; 5579 qent->v6 = 0; 5580 wkq = &sctp_mcore_workers[cpu_to_use]; 5581 SCTP_MCORE_QLOCK(wkq); 5582 5583 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5584 if (wkq->running == 0) { 5585 need_wake = 1; 5586 } 5587 SCTP_MCORE_QUNLOCK(wkq); 5588 if (need_wake) { 5589 wakeup(&wkq->running); 5590 } 5591 } 5592 5593 static void 5594 sctp_mcore_thread(void *arg) 5595 { 5596 5597 struct sctp_mcore_ctrl *wkq; 5598 struct sctp_mcore_queue *qent; 5599 5600 wkq = (struct sctp_mcore_ctrl *)arg; 5601 struct mbuf *m; 5602 int off, v6; 5603 5604 /* Wait for first tickle */ 5605 SCTP_MCORE_LOCK(wkq); 5606 wkq->running = 0; 5607 msleep(&wkq->running, 5608 &wkq->core_mtx, 5609 0, "wait for pkt", 0); 5610 SCTP_MCORE_UNLOCK(wkq); 5611 5612 /* Bind to our cpu */ 5613 thread_lock(curthread); 5614 sched_bind(curthread, wkq->cpuid); 5615 thread_unlock(curthread); 5616 5617 /* Now lets start working */ 5618 SCTP_MCORE_LOCK(wkq); 5619 /* Now grab lock and go */ 5620 for (;;) { 5621 SCTP_MCORE_QLOCK(wkq); 5622 skip_sleep: 5623 wkq->running = 1; 5624 qent = TAILQ_FIRST(&wkq->que); 5625 if (qent) { 5626 TAILQ_REMOVE(&wkq->que, qent, next); 5627 SCTP_MCORE_QUNLOCK(wkq); 5628 CURVNET_SET(qent->vn); 5629 m = qent->m; 5630 off = qent->off; 5631 v6 = qent->v6; 5632 SCTP_FREE(qent, SCTP_M_MCORE); 5633 if (v6 == 0) { 5634 sctp_input_with_port(m, off, 0); 5635 } else { 5636 SCTP_PRINTF("V6 not yet supported\n"); 5637 sctp_m_freem(m); 5638 } 5639 CURVNET_RESTORE(); 5640 SCTP_MCORE_QLOCK(wkq); 5641 } 5642 wkq->running = 0; 5643 if (!TAILQ_EMPTY(&wkq->que)) { 5644 goto skip_sleep; 5645 } 5646 SCTP_MCORE_QUNLOCK(wkq); 5647 msleep(&wkq->running, 5648 &wkq->core_mtx, 5649 0, "wait for pkt", 0); 5650 } 5651 } 5652 5653 static void 5654 sctp_startup_mcore_threads(void) 5655 { 5656 int i, cpu; 5657 5658 if (mp_ncpus == 1) 5659 return; 5660 5661 if (sctp_mcore_workers != NULL) { 5662 /* 5663 * Already been here in some previous vnet? 5664 */ 5665 return; 5666 } 5667 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5668 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5669 SCTP_M_MCORE); 5670 if (sctp_mcore_workers == NULL) { 5671 /* TSNH I hope */ 5672 return; 5673 } 5674 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5675 sizeof(struct sctp_mcore_ctrl))); 5676 /* Init the structures */ 5677 for (i = 0; i <= mp_maxid; i++) { 5678 TAILQ_INIT(&sctp_mcore_workers[i].que); 5679 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5680 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5681 sctp_mcore_workers[i].cpuid = i; 5682 } 5683 if (sctp_cpuarry == NULL) { 5684 SCTP_MALLOC(sctp_cpuarry, int *, 5685 (mp_ncpus * sizeof(int)), 5686 SCTP_M_MCORE); 5687 i = 0; 5688 CPU_FOREACH(cpu) { 5689 sctp_cpuarry[i] = cpu; 5690 i++; 5691 } 5692 } 5693 /* Now start them all */ 5694 CPU_FOREACH(cpu) { 5695 (void)kproc_create(sctp_mcore_thread, 5696 (void *)&sctp_mcore_workers[cpu], 5697 &sctp_mcore_workers[cpu].thread_proc, 5698 RFPROC, 5699 SCTP_KTHREAD_PAGES, 5700 SCTP_MCORE_NAME); 5701 5702 } 5703 } 5704 5705 #endif 5706 5707 void 5708 sctp_pcb_init() 5709 { 5710 /* 5711 * SCTP initialization for the PCB structures should be called by 5712 * the sctp_init() funciton. 5713 */ 5714 int i; 5715 struct timeval tv; 5716 5717 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5718 /* error I was called twice */ 5719 return; 5720 } 5721 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5722 5723 #if defined(SCTP_LOCAL_TRACE_BUF) 5724 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5725 #endif 5726 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5727 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5728 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5729 SCTP_M_MCORE); 5730 #endif 5731 (void)SCTP_GETTIME_TIMEVAL(&tv); 5732 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5733 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5734 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5735 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5736 #else 5737 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5738 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5739 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5740 #endif 5741 /* init the empty list of (All) Endpoints */ 5742 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5743 5744 5745 /* init the hash table of endpoints */ 5746 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5747 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5748 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5749 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5750 &SCTP_BASE_INFO(hashasocmark)); 5751 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5752 &SCTP_BASE_INFO(hashmark)); 5753 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5754 &SCTP_BASE_INFO(hashtcpmark)); 5755 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5756 5757 5758 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5759 &SCTP_BASE_INFO(hashvrfmark)); 5760 5761 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5762 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5763 /* init the zones */ 5764 /* 5765 * FIX ME: Should check for NULL returns, but if it does fail we are 5766 * doomed to panic anyways... add later maybe. 5767 */ 5768 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5769 sizeof(struct sctp_inpcb), maxsockets); 5770 5771 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5772 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5773 5774 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5775 sizeof(struct sctp_laddr), 5776 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5777 5778 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5779 sizeof(struct sctp_nets), 5780 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5781 5782 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5783 sizeof(struct sctp_tmit_chunk), 5784 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5785 5786 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5787 sizeof(struct sctp_queued_to_read), 5788 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5789 5790 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5791 sizeof(struct sctp_stream_queue_pending), 5792 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5793 5794 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5795 sizeof(struct sctp_asconf), 5796 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5797 5798 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5799 sizeof(struct sctp_asconf_ack), 5800 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5801 5802 5803 /* Master Lock INIT for info structure */ 5804 SCTP_INP_INFO_LOCK_INIT(); 5805 SCTP_STATLOG_INIT_LOCK(); 5806 5807 SCTP_IPI_COUNT_INIT(); 5808 SCTP_IPI_ADDR_INIT(); 5809 #ifdef SCTP_PACKET_LOGGING 5810 SCTP_IP_PKTLOG_INIT(); 5811 #endif 5812 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5813 5814 SCTP_WQ_ADDR_INIT(); 5815 /* not sure if we need all the counts */ 5816 SCTP_BASE_INFO(ipi_count_ep) = 0; 5817 /* assoc/tcb zone info */ 5818 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5819 /* local addrlist zone info */ 5820 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5821 /* remote addrlist zone info */ 5822 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5823 /* chunk info */ 5824 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5825 5826 /* socket queue zone info */ 5827 SCTP_BASE_INFO(ipi_count_readq) = 0; 5828 5829 /* stream out queue cont */ 5830 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5831 5832 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5833 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5834 5835 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5836 5837 /* Init the TIMEWAIT list */ 5838 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5839 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5840 } 5841 sctp_startup_iterator(); 5842 5843 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5844 sctp_startup_mcore_threads(); 5845 #endif 5846 5847 /* 5848 * INIT the default VRF which for BSD is the only one, other O/S's 5849 * may have more. But initially they must start with one and then 5850 * add the VRF's as addresses are added. 5851 */ 5852 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5853 } 5854 5855 /* 5856 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5857 */ 5858 void 5859 sctp_pcb_finish(void) 5860 { 5861 struct sctp_vrflist *vrf_bucket; 5862 struct sctp_vrf *vrf, *nvrf; 5863 struct sctp_ifn *ifn, *nifn; 5864 struct sctp_ifa *ifa, *nifa; 5865 struct sctpvtaghead *chain; 5866 struct sctp_tagblock *twait_block, *prev_twait_block; 5867 struct sctp_laddr *wi, *nwi; 5868 int i; 5869 struct sctp_iterator *it, *nit; 5870 5871 /* 5872 * In FreeBSD the iterator thread never exits but we do clean up. 5873 * The only way FreeBSD reaches here is if we have VRF's but we 5874 * still add the ifdef to make it compile on old versions. 5875 */ 5876 SCTP_IPI_ITERATOR_WQ_LOCK(); 5877 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5878 if (it->vn != curvnet) { 5879 continue; 5880 } 5881 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5882 if (it->function_atend != NULL) { 5883 (*it->function_atend) (it->pointer, it->val); 5884 } 5885 SCTP_FREE(it, SCTP_M_ITER); 5886 } 5887 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5888 SCTP_ITERATOR_LOCK(); 5889 if ((sctp_it_ctl.cur_it) && 5890 (sctp_it_ctl.cur_it->vn == curvnet)) { 5891 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5892 } 5893 SCTP_ITERATOR_UNLOCK(); 5894 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5895 SCTP_WQ_ADDR_LOCK(); 5896 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5897 LIST_REMOVE(wi, sctp_nxt_addr); 5898 SCTP_DECR_LADDR_COUNT(); 5899 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5900 } 5901 SCTP_WQ_ADDR_UNLOCK(); 5902 5903 /* 5904 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5905 * destroyed first). 5906 */ 5907 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5908 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5909 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5910 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5911 /* free the ifa */ 5912 LIST_REMOVE(ifa, next_bucket); 5913 LIST_REMOVE(ifa, next_ifa); 5914 SCTP_FREE(ifa, SCTP_M_IFA); 5915 } 5916 /* free the ifn */ 5917 LIST_REMOVE(ifn, next_bucket); 5918 LIST_REMOVE(ifn, next_ifn); 5919 SCTP_FREE(ifn, SCTP_M_IFN); 5920 } 5921 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5922 /* free the vrf */ 5923 LIST_REMOVE(vrf, next_vrf); 5924 SCTP_FREE(vrf, SCTP_M_VRF); 5925 } 5926 /* free the vrf hashes */ 5927 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5928 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5929 5930 /* 5931 * free the TIMEWAIT list elements malloc'd in the function 5932 * sctp_add_vtag_to_timewait()... 5933 */ 5934 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5935 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5936 if (!LIST_EMPTY(chain)) { 5937 prev_twait_block = NULL; 5938 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5939 if (prev_twait_block) { 5940 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5941 } 5942 prev_twait_block = twait_block; 5943 } 5944 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5945 } 5946 } 5947 5948 /* free the locks and mutexes */ 5949 #ifdef SCTP_PACKET_LOGGING 5950 SCTP_IP_PKTLOG_DESTROY(); 5951 #endif 5952 SCTP_IPI_ADDR_DESTROY(); 5953 SCTP_STATLOG_DESTROY(); 5954 SCTP_INP_INFO_LOCK_DESTROY(); 5955 5956 SCTP_WQ_ADDR_DESTROY(); 5957 5958 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5959 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5960 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5961 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5962 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5963 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5964 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5965 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5966 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5967 /* Get rid of other stuff to */ 5968 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5969 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5970 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5971 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5972 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5973 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5974 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5975 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5976 #endif 5977 } 5978 5979 5980 int 5981 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5982 int offset, int limit, 5983 struct sockaddr *src, struct sockaddr *dst, 5984 struct sockaddr *altsa) 5985 { 5986 /* 5987 * grub through the INIT pulling addresses and loading them to the 5988 * nets structure in the asoc. The from address in the mbuf should 5989 * also be loaded (if it is not already). This routine can be called 5990 * with either INIT or INIT-ACK's as long as the m points to the IP 5991 * packet and the offset points to the beginning of the parameters. 5992 */ 5993 struct sctp_inpcb *inp; 5994 struct sctp_nets *net, *nnet, *net_tmp; 5995 struct sctp_paramhdr *phdr, parm_buf; 5996 struct sctp_tcb *stcb_tmp; 5997 uint16_t ptype, plen; 5998 struct sockaddr *sa; 5999 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6000 struct sctp_auth_random *p_random = NULL; 6001 uint16_t random_len = 0; 6002 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6003 struct sctp_auth_hmac_algo *hmacs = NULL; 6004 uint16_t hmacs_len = 0; 6005 uint8_t saw_asconf = 0; 6006 uint8_t saw_asconf_ack = 0; 6007 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6008 struct sctp_auth_chunk_list *chunks = NULL; 6009 uint16_t num_chunks = 0; 6010 sctp_key_t *new_key; 6011 uint32_t keylen; 6012 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6013 uint8_t ecn_allowed; 6014 6015 #ifdef INET 6016 struct sockaddr_in sin; 6017 6018 #endif 6019 #ifdef INET6 6020 struct sockaddr_in6 sin6; 6021 6022 #endif 6023 6024 /* First get the destination address setup too. */ 6025 #ifdef INET 6026 memset(&sin, 0, sizeof(sin)); 6027 sin.sin_family = AF_INET; 6028 sin.sin_len = sizeof(sin); 6029 sin.sin_port = stcb->rport; 6030 #endif 6031 #ifdef INET6 6032 memset(&sin6, 0, sizeof(sin6)); 6033 sin6.sin6_family = AF_INET6; 6034 sin6.sin6_len = sizeof(struct sockaddr_in6); 6035 sin6.sin6_port = stcb->rport; 6036 #endif 6037 if (altsa) { 6038 sa = altsa; 6039 } else { 6040 sa = src; 6041 } 6042 /* Turn off ECN until we get through all params */ 6043 ecn_allowed = 0; 6044 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6045 /* mark all addresses that we have currently on the list */ 6046 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6047 } 6048 /* does the source address already exist? if so skip it */ 6049 inp = stcb->sctp_ep; 6050 atomic_add_int(&stcb->asoc.refcnt, 1); 6051 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6052 atomic_add_int(&stcb->asoc.refcnt, -1); 6053 6054 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6055 /* we must add the source address */ 6056 /* no scope set here since we have a tcb already. */ 6057 switch (sa->sa_family) { 6058 #ifdef INET 6059 case AF_INET: 6060 if (stcb->asoc.scope.ipv4_addr_legal) { 6061 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6062 return (-1); 6063 } 6064 } 6065 break; 6066 #endif 6067 #ifdef INET6 6068 case AF_INET6: 6069 if (stcb->asoc.scope.ipv6_addr_legal) { 6070 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6071 return (-2); 6072 } 6073 } 6074 break; 6075 #endif 6076 default: 6077 break; 6078 } 6079 } else { 6080 if (net_tmp != NULL && stcb_tmp == stcb) { 6081 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6082 } else if (stcb_tmp != stcb) { 6083 /* It belongs to another association? */ 6084 if (stcb_tmp) 6085 SCTP_TCB_UNLOCK(stcb_tmp); 6086 return (-3); 6087 } 6088 } 6089 if (stcb->asoc.state == 0) { 6090 /* the assoc was freed? */ 6091 return (-4); 6092 } 6093 /* 6094 * peer must explicitly turn this on. This may have been initialized 6095 * to be "on" in order to allow local addr changes while INIT's are 6096 * in flight. 6097 */ 6098 stcb->asoc.peer_supports_asconf = 0; 6099 /* now we must go through each of the params. */ 6100 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6101 while (phdr) { 6102 ptype = ntohs(phdr->param_type); 6103 plen = ntohs(phdr->param_length); 6104 /* 6105 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6106 * (uint32_t)ptype, (int)plen); 6107 */ 6108 if (offset + plen > limit) { 6109 break; 6110 } 6111 if (plen == 0) { 6112 break; 6113 } 6114 #ifdef INET 6115 if (ptype == SCTP_IPV4_ADDRESS) { 6116 if (stcb->asoc.scope.ipv4_addr_legal) { 6117 struct sctp_ipv4addr_param *p4, p4_buf; 6118 6119 /* ok get the v4 address and check/add */ 6120 phdr = sctp_get_next_param(m, offset, 6121 (struct sctp_paramhdr *)&p4_buf, 6122 sizeof(p4_buf)); 6123 if (plen != sizeof(struct sctp_ipv4addr_param) || 6124 phdr == NULL) { 6125 return (-5); 6126 } 6127 p4 = (struct sctp_ipv4addr_param *)phdr; 6128 sin.sin_addr.s_addr = p4->addr; 6129 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6130 /* Skip multi-cast addresses */ 6131 goto next_param; 6132 } 6133 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6134 (sin.sin_addr.s_addr == INADDR_ANY)) { 6135 goto next_param; 6136 } 6137 sa = (struct sockaddr *)&sin; 6138 inp = stcb->sctp_ep; 6139 atomic_add_int(&stcb->asoc.refcnt, 1); 6140 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6141 dst, stcb); 6142 atomic_add_int(&stcb->asoc.refcnt, -1); 6143 6144 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6145 inp == NULL) { 6146 /* we must add the source address */ 6147 /* 6148 * no scope set since we have a tcb 6149 * already 6150 */ 6151 6152 /* 6153 * we must validate the state again 6154 * here 6155 */ 6156 add_it_now: 6157 if (stcb->asoc.state == 0) { 6158 /* the assoc was freed? */ 6159 return (-7); 6160 } 6161 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6162 return (-8); 6163 } 6164 } else if (stcb_tmp == stcb) { 6165 if (stcb->asoc.state == 0) { 6166 /* the assoc was freed? */ 6167 return (-10); 6168 } 6169 if (net != NULL) { 6170 /* clear flag */ 6171 net->dest_state &= 6172 ~SCTP_ADDR_NOT_IN_ASSOC; 6173 } 6174 } else { 6175 /* 6176 * strange, address is in another 6177 * assoc? straighten out locks. 6178 */ 6179 if (stcb_tmp) { 6180 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6181 /* 6182 * in setup state we 6183 * abort this guy 6184 */ 6185 sctp_abort_an_association(stcb_tmp->sctp_ep, 6186 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6187 goto add_it_now; 6188 } 6189 SCTP_TCB_UNLOCK(stcb_tmp); 6190 } 6191 if (stcb->asoc.state == 0) { 6192 /* the assoc was freed? */ 6193 return (-12); 6194 } 6195 return (-13); 6196 } 6197 } 6198 } else 6199 #endif 6200 #ifdef INET6 6201 if (ptype == SCTP_IPV6_ADDRESS) { 6202 if (stcb->asoc.scope.ipv6_addr_legal) { 6203 /* ok get the v6 address and check/add */ 6204 struct sctp_ipv6addr_param *p6, p6_buf; 6205 6206 phdr = sctp_get_next_param(m, offset, 6207 (struct sctp_paramhdr *)&p6_buf, 6208 sizeof(p6_buf)); 6209 if (plen != sizeof(struct sctp_ipv6addr_param) || 6210 phdr == NULL) { 6211 return (-14); 6212 } 6213 p6 = (struct sctp_ipv6addr_param *)phdr; 6214 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6215 sizeof(p6->addr)); 6216 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6217 /* Skip multi-cast addresses */ 6218 goto next_param; 6219 } 6220 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6221 /* 6222 * Link local make no sense without 6223 * scope 6224 */ 6225 goto next_param; 6226 } 6227 sa = (struct sockaddr *)&sin6; 6228 inp = stcb->sctp_ep; 6229 atomic_add_int(&stcb->asoc.refcnt, 1); 6230 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6231 dst, stcb); 6232 atomic_add_int(&stcb->asoc.refcnt, -1); 6233 if (stcb_tmp == NULL && 6234 (inp == stcb->sctp_ep || inp == NULL)) { 6235 /* 6236 * we must validate the state again 6237 * here 6238 */ 6239 add_it_now6: 6240 if (stcb->asoc.state == 0) { 6241 /* the assoc was freed? */ 6242 return (-16); 6243 } 6244 /* 6245 * we must add the address, no scope 6246 * set 6247 */ 6248 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6249 return (-17); 6250 } 6251 } else if (stcb_tmp == stcb) { 6252 /* 6253 * we must validate the state again 6254 * here 6255 */ 6256 if (stcb->asoc.state == 0) { 6257 /* the assoc was freed? */ 6258 return (-19); 6259 } 6260 if (net != NULL) { 6261 /* clear flag */ 6262 net->dest_state &= 6263 ~SCTP_ADDR_NOT_IN_ASSOC; 6264 } 6265 } else { 6266 /* 6267 * strange, address is in another 6268 * assoc? straighten out locks. 6269 */ 6270 if (stcb_tmp) 6271 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6272 /* 6273 * in setup state we 6274 * abort this guy 6275 */ 6276 sctp_abort_an_association(stcb_tmp->sctp_ep, 6277 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6278 goto add_it_now6; 6279 } 6280 SCTP_TCB_UNLOCK(stcb_tmp); 6281 6282 if (stcb->asoc.state == 0) { 6283 /* the assoc was freed? */ 6284 return (-21); 6285 } 6286 return (-22); 6287 } 6288 } 6289 } else 6290 #endif 6291 if (ptype == SCTP_ECN_CAPABLE) { 6292 ecn_allowed = 1; 6293 } else if (ptype == SCTP_ULP_ADAPTATION) { 6294 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6295 struct sctp_adaptation_layer_indication ai, 6296 *aip; 6297 6298 phdr = sctp_get_next_param(m, offset, 6299 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6300 aip = (struct sctp_adaptation_layer_indication *)phdr; 6301 if (aip) { 6302 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6303 stcb->asoc.adaptation_needed = 1; 6304 } 6305 } 6306 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6307 struct sctp_asconf_addr_param lstore, *fee; 6308 int lptype; 6309 struct sockaddr *lsa = NULL; 6310 6311 #ifdef INET 6312 struct sctp_asconf_addrv4_param *fii; 6313 6314 #endif 6315 6316 stcb->asoc.peer_supports_asconf = 1; 6317 if (plen > sizeof(lstore)) { 6318 return (-23); 6319 } 6320 phdr = sctp_get_next_param(m, offset, 6321 (struct sctp_paramhdr *)&lstore, 6322 min(plen, sizeof(lstore))); 6323 if (phdr == NULL) { 6324 return (-24); 6325 } 6326 fee = (struct sctp_asconf_addr_param *)phdr; 6327 lptype = ntohs(fee->addrp.ph.param_type); 6328 switch (lptype) { 6329 #ifdef INET 6330 case SCTP_IPV4_ADDRESS: 6331 if (plen != 6332 sizeof(struct sctp_asconf_addrv4_param)) { 6333 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6334 (int)sizeof(struct sctp_asconf_addrv4_param), 6335 plen); 6336 } else { 6337 fii = (struct sctp_asconf_addrv4_param *)fee; 6338 sin.sin_addr.s_addr = fii->addrp.addr; 6339 lsa = (struct sockaddr *)&sin; 6340 } 6341 break; 6342 #endif 6343 #ifdef INET6 6344 case SCTP_IPV6_ADDRESS: 6345 if (plen != 6346 sizeof(struct sctp_asconf_addr_param)) { 6347 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6348 (int)sizeof(struct sctp_asconf_addr_param), 6349 plen); 6350 } else { 6351 memcpy(sin6.sin6_addr.s6_addr, 6352 fee->addrp.addr, 6353 sizeof(fee->addrp.addr)); 6354 lsa = (struct sockaddr *)&sin6; 6355 } 6356 break; 6357 #endif 6358 default: 6359 break; 6360 } 6361 if (lsa) { 6362 (void)sctp_set_primary_addr(stcb, sa, NULL); 6363 } 6364 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6365 stcb->asoc.peer_supports_nat = 1; 6366 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6367 /* Peer supports pr-sctp */ 6368 stcb->asoc.peer_supports_prsctp = 1; 6369 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6370 /* A supported extension chunk */ 6371 struct sctp_supported_chunk_types_param *pr_supported; 6372 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6373 int num_ent, i; 6374 6375 phdr = sctp_get_next_param(m, offset, 6376 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6377 if (phdr == NULL) { 6378 return (-25); 6379 } 6380 stcb->asoc.peer_supports_asconf = 0; 6381 stcb->asoc.peer_supports_prsctp = 0; 6382 stcb->asoc.peer_supports_pktdrop = 0; 6383 stcb->asoc.peer_supports_strreset = 0; 6384 stcb->asoc.peer_supports_nr_sack = 0; 6385 stcb->asoc.peer_supports_auth = 0; 6386 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6387 num_ent = plen - sizeof(struct sctp_paramhdr); 6388 for (i = 0; i < num_ent; i++) { 6389 switch (pr_supported->chunk_types[i]) { 6390 case SCTP_ASCONF: 6391 case SCTP_ASCONF_ACK: 6392 stcb->asoc.peer_supports_asconf = 1; 6393 break; 6394 case SCTP_FORWARD_CUM_TSN: 6395 stcb->asoc.peer_supports_prsctp = 1; 6396 break; 6397 case SCTP_PACKET_DROPPED: 6398 stcb->asoc.peer_supports_pktdrop = 1; 6399 break; 6400 case SCTP_NR_SELECTIVE_ACK: 6401 stcb->asoc.peer_supports_nr_sack = 1; 6402 break; 6403 case SCTP_STREAM_RESET: 6404 stcb->asoc.peer_supports_strreset = 1; 6405 break; 6406 case SCTP_AUTHENTICATION: 6407 stcb->asoc.peer_supports_auth = 1; 6408 break; 6409 default: 6410 /* one I have not learned yet */ 6411 break; 6412 6413 } 6414 } 6415 } else if (ptype == SCTP_RANDOM) { 6416 if (plen > sizeof(random_store)) 6417 break; 6418 if (got_random) { 6419 /* already processed a RANDOM */ 6420 goto next_param; 6421 } 6422 phdr = sctp_get_next_param(m, offset, 6423 (struct sctp_paramhdr *)random_store, 6424 min(sizeof(random_store), plen)); 6425 if (phdr == NULL) 6426 return (-26); 6427 p_random = (struct sctp_auth_random *)phdr; 6428 random_len = plen - sizeof(*p_random); 6429 /* enforce the random length */ 6430 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6431 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6432 return (-27); 6433 } 6434 got_random = 1; 6435 } else if (ptype == SCTP_HMAC_LIST) { 6436 int num_hmacs; 6437 int i; 6438 6439 if (plen > sizeof(hmacs_store)) 6440 break; 6441 if (got_hmacs) { 6442 /* already processed a HMAC list */ 6443 goto next_param; 6444 } 6445 phdr = sctp_get_next_param(m, offset, 6446 (struct sctp_paramhdr *)hmacs_store, 6447 min(plen, sizeof(hmacs_store))); 6448 if (phdr == NULL) 6449 return (-28); 6450 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6451 hmacs_len = plen - sizeof(*hmacs); 6452 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6453 /* validate the hmac list */ 6454 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6455 return (-29); 6456 } 6457 if (stcb->asoc.peer_hmacs != NULL) 6458 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6459 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6460 if (stcb->asoc.peer_hmacs != NULL) { 6461 for (i = 0; i < num_hmacs; i++) { 6462 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6463 ntohs(hmacs->hmac_ids[i])); 6464 } 6465 } 6466 got_hmacs = 1; 6467 } else if (ptype == SCTP_CHUNK_LIST) { 6468 int i; 6469 6470 if (plen > sizeof(chunks_store)) 6471 break; 6472 if (got_chklist) { 6473 /* already processed a Chunks list */ 6474 goto next_param; 6475 } 6476 phdr = sctp_get_next_param(m, offset, 6477 (struct sctp_paramhdr *)chunks_store, 6478 min(plen, sizeof(chunks_store))); 6479 if (phdr == NULL) 6480 return (-30); 6481 chunks = (struct sctp_auth_chunk_list *)phdr; 6482 num_chunks = plen - sizeof(*chunks); 6483 if (stcb->asoc.peer_auth_chunks != NULL) 6484 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6485 else 6486 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6487 for (i = 0; i < num_chunks; i++) { 6488 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6489 stcb->asoc.peer_auth_chunks); 6490 /* record asconf/asconf-ack if listed */ 6491 if (chunks->chunk_types[i] == SCTP_ASCONF) 6492 saw_asconf = 1; 6493 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6494 saw_asconf_ack = 1; 6495 6496 } 6497 got_chklist = 1; 6498 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6499 (ptype == SCTP_STATE_COOKIE) || 6500 (ptype == SCTP_UNRECOG_PARAM) || 6501 (ptype == SCTP_COOKIE_PRESERVE) || 6502 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6503 (ptype == SCTP_ADD_IP_ADDRESS) || 6504 (ptype == SCTP_DEL_IP_ADDRESS) || 6505 (ptype == SCTP_ERROR_CAUSE_IND) || 6506 (ptype == SCTP_SUCCESS_REPORT)) { 6507 /* don't care */ ; 6508 } else { 6509 if ((ptype & 0x8000) == 0x0000) { 6510 /* 6511 * must stop processing the rest of the 6512 * param's. Any report bits were handled 6513 * with the call to 6514 * sctp_arethere_unrecognized_parameters() 6515 * when the INIT or INIT-ACK was first seen. 6516 */ 6517 break; 6518 } 6519 } 6520 6521 next_param: 6522 offset += SCTP_SIZE32(plen); 6523 if (offset >= limit) { 6524 break; 6525 } 6526 phdr = sctp_get_next_param(m, offset, &parm_buf, 6527 sizeof(parm_buf)); 6528 } 6529 /* Now check to see if we need to purge any addresses */ 6530 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6531 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6532 SCTP_ADDR_NOT_IN_ASSOC) { 6533 /* This address has been removed from the asoc */ 6534 /* remove and free it */ 6535 stcb->asoc.numnets--; 6536 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6537 sctp_free_remote_addr(net); 6538 if (net == stcb->asoc.primary_destination) { 6539 stcb->asoc.primary_destination = NULL; 6540 sctp_select_primary_destination(stcb); 6541 } 6542 } 6543 } 6544 if (ecn_allowed == 0) { 6545 stcb->asoc.ecn_allowed = 0; 6546 } 6547 /* validate authentication required parameters */ 6548 if (got_random && got_hmacs) { 6549 stcb->asoc.peer_supports_auth = 1; 6550 } else { 6551 stcb->asoc.peer_supports_auth = 0; 6552 } 6553 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6554 /* peer does not support auth but sent a chunks list? */ 6555 return (-31); 6556 } 6557 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6558 !stcb->asoc.peer_supports_auth) { 6559 /* peer supports asconf but not auth? */ 6560 return (-32); 6561 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6562 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6563 return (-33); 6564 } 6565 /* concatenate the full random key */ 6566 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6567 if (chunks != NULL) { 6568 keylen += sizeof(*chunks) + num_chunks; 6569 } 6570 new_key = sctp_alloc_key(keylen); 6571 if (new_key != NULL) { 6572 /* copy in the RANDOM */ 6573 if (p_random != NULL) { 6574 keylen = sizeof(*p_random) + random_len; 6575 bcopy(p_random, new_key->key, keylen); 6576 } 6577 /* append in the AUTH chunks */ 6578 if (chunks != NULL) { 6579 bcopy(chunks, new_key->key + keylen, 6580 sizeof(*chunks) + num_chunks); 6581 keylen += sizeof(*chunks) + num_chunks; 6582 } 6583 /* append in the HMACs */ 6584 if (hmacs != NULL) { 6585 bcopy(hmacs, new_key->key + keylen, 6586 sizeof(*hmacs) + hmacs_len); 6587 } 6588 } else { 6589 /* failed to get memory for the key */ 6590 return (-34); 6591 } 6592 if (stcb->asoc.authinfo.peer_random != NULL) 6593 sctp_free_key(stcb->asoc.authinfo.peer_random); 6594 stcb->asoc.authinfo.peer_random = new_key; 6595 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6596 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6597 6598 return (0); 6599 } 6600 6601 int 6602 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6603 struct sctp_nets *net) 6604 { 6605 /* make sure the requested primary address exists in the assoc */ 6606 if (net == NULL && sa) 6607 net = sctp_findnet(stcb, sa); 6608 6609 if (net == NULL) { 6610 /* didn't find the requested primary address! */ 6611 return (-1); 6612 } else { 6613 /* set the primary address */ 6614 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6615 /* Must be confirmed, so queue to set */ 6616 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6617 return (0); 6618 } 6619 stcb->asoc.primary_destination = net; 6620 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6621 sctp_free_remote_addr(stcb->asoc.alternate); 6622 stcb->asoc.alternate = NULL; 6623 } 6624 net = TAILQ_FIRST(&stcb->asoc.nets); 6625 if (net != stcb->asoc.primary_destination) { 6626 /* 6627 * first one on the list is NOT the primary 6628 * sctp_cmpaddr() is much more efficient if the 6629 * primary is the first on the list, make it so. 6630 */ 6631 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6632 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6633 } 6634 return (0); 6635 } 6636 } 6637 6638 int 6639 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6640 { 6641 /* 6642 * This function serves two purposes. It will see if a TAG can be 6643 * re-used and return 1 for yes it is ok and 0 for don't use that 6644 * tag. A secondary function it will do is purge out old tags that 6645 * can be removed. 6646 */ 6647 struct sctpvtaghead *chain; 6648 struct sctp_tagblock *twait_block; 6649 struct sctpasochead *head; 6650 struct sctp_tcb *stcb; 6651 int i; 6652 6653 SCTP_INP_INFO_RLOCK(); 6654 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6655 SCTP_BASE_INFO(hashasocmark))]; 6656 if (head == NULL) { 6657 /* invalid vtag */ 6658 goto skip_vtag_check; 6659 } 6660 LIST_FOREACH(stcb, head, sctp_asocs) { 6661 /* 6662 * We choose not to lock anything here. TCB's can't be 6663 * removed since we have the read lock, so they can't be 6664 * freed on us, same thing for the INP. I may be wrong with 6665 * this assumption, but we will go with it for now :-) 6666 */ 6667 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6668 continue; 6669 } 6670 if (stcb->asoc.my_vtag == tag) { 6671 /* candidate */ 6672 if (stcb->rport != rport) { 6673 continue; 6674 } 6675 if (stcb->sctp_ep->sctp_lport != lport) { 6676 continue; 6677 } 6678 /* Its a used tag set */ 6679 SCTP_INP_INFO_RUNLOCK(); 6680 return (0); 6681 } 6682 } 6683 skip_vtag_check: 6684 6685 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6686 /* Now what about timed wait ? */ 6687 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6688 /* 6689 * Block(s) are present, lets see if we have this tag in the 6690 * list 6691 */ 6692 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6693 if (twait_block->vtag_block[i].v_tag == 0) { 6694 /* not used */ 6695 continue; 6696 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6697 now->tv_sec) { 6698 /* Audit expires this guy */ 6699 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6700 twait_block->vtag_block[i].v_tag = 0; 6701 twait_block->vtag_block[i].lport = 0; 6702 twait_block->vtag_block[i].rport = 0; 6703 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6704 (twait_block->vtag_block[i].lport == lport) && 6705 (twait_block->vtag_block[i].rport == rport)) { 6706 /* Bad tag, sorry :< */ 6707 SCTP_INP_INFO_RUNLOCK(); 6708 return (0); 6709 } 6710 } 6711 } 6712 SCTP_INP_INFO_RUNLOCK(); 6713 return (1); 6714 } 6715 6716 static void 6717 sctp_drain_mbufs(struct sctp_tcb *stcb) 6718 { 6719 /* 6720 * We must hunt this association for MBUF's past the cumack (i.e. 6721 * out of order data that we can renege on). 6722 */ 6723 struct sctp_association *asoc; 6724 struct sctp_tmit_chunk *chk, *nchk; 6725 uint32_t cumulative_tsn_p1; 6726 struct sctp_queued_to_read *ctl, *nctl; 6727 int cnt, strmat; 6728 uint32_t gap, i; 6729 int fnd = 0; 6730 6731 /* We look for anything larger than the cum-ack + 1 */ 6732 6733 asoc = &stcb->asoc; 6734 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6735 /* none we can reneg on. */ 6736 return; 6737 } 6738 SCTP_STAT_INCR(sctps_protocol_drains_done); 6739 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6740 cnt = 0; 6741 /* First look in the re-assembly queue */ 6742 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6743 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6744 /* Yep it is above cum-ack */ 6745 cnt++; 6746 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6747 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6748 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6749 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6750 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6751 if (chk->data) { 6752 sctp_m_freem(chk->data); 6753 chk->data = NULL; 6754 } 6755 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6756 } 6757 } 6758 /* Ok that was fun, now we will drain all the inbound streams? */ 6759 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6760 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6761 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6762 /* Yep it is above cum-ack */ 6763 cnt++; 6764 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6765 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6766 sctp_ucount_decr(asoc->cnt_on_all_streams); 6767 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6768 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6769 if (ctl->data) { 6770 sctp_m_freem(ctl->data); 6771 ctl->data = NULL; 6772 } 6773 sctp_free_remote_addr(ctl->whoFrom); 6774 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6775 SCTP_DECR_READQ_COUNT(); 6776 } 6777 } 6778 } 6779 if (cnt) { 6780 /* We must back down to see what the new highest is */ 6781 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6782 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6783 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6784 asoc->highest_tsn_inside_map = i; 6785 fnd = 1; 6786 break; 6787 } 6788 } 6789 if (!fnd) { 6790 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6791 } 6792 /* 6793 * Question, should we go through the delivery queue? The 6794 * only reason things are on here is the app not reading OR 6795 * a p-d-api up. An attacker COULD send enough in to 6796 * initiate the PD-API and then send a bunch of stuff to 6797 * other streams... these would wind up on the delivery 6798 * queue.. and then we would not get to them. But in order 6799 * to do this I then have to back-track and un-deliver 6800 * sequence numbers in streams.. el-yucko. I think for now 6801 * we will NOT look at the delivery queue and leave it to be 6802 * something to consider later. An alternative would be to 6803 * abort the P-D-API with a notification and then deliver 6804 * the data.... Or another method might be to keep track of 6805 * how many times the situation occurs and if we see a 6806 * possible attack underway just abort the association. 6807 */ 6808 #ifdef SCTP_DEBUG 6809 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6810 #endif 6811 /* 6812 * Now do we need to find a new 6813 * asoc->highest_tsn_inside_map? 6814 */ 6815 asoc->last_revoke_count = cnt; 6816 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6817 /* sa_ignore NO_NULL_CHK */ 6818 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6819 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6820 } 6821 /* 6822 * Another issue, in un-setting the TSN's in the mapping array we 6823 * DID NOT adjust the highest_tsn marker. This will cause one of 6824 * two things to occur. It may cause us to do extra work in checking 6825 * for our mapping array movement. More importantly it may cause us 6826 * to SACK every datagram. This may not be a bad thing though since 6827 * we will recover once we get our cum-ack above and all this stuff 6828 * we dumped recovered. 6829 */ 6830 } 6831 6832 void 6833 sctp_drain() 6834 { 6835 /* 6836 * We must walk the PCB lists for ALL associations here. The system 6837 * is LOW on MBUF's and needs help. This is where reneging will 6838 * occur. We really hope this does NOT happen! 6839 */ 6840 VNET_ITERATOR_DECL(vnet_iter); 6841 VNET_LIST_RLOCK_NOSLEEP(); 6842 VNET_FOREACH(vnet_iter) { 6843 CURVNET_SET(vnet_iter); 6844 struct sctp_inpcb *inp; 6845 struct sctp_tcb *stcb; 6846 6847 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6848 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6849 #ifdef VIMAGE 6850 continue; 6851 #else 6852 return; 6853 #endif 6854 } 6855 SCTP_INP_INFO_RLOCK(); 6856 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6857 /* For each endpoint */ 6858 SCTP_INP_RLOCK(inp); 6859 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6860 /* For each association */ 6861 SCTP_TCB_LOCK(stcb); 6862 sctp_drain_mbufs(stcb); 6863 SCTP_TCB_UNLOCK(stcb); 6864 } 6865 SCTP_INP_RUNLOCK(inp); 6866 } 6867 SCTP_INP_INFO_RUNLOCK(); 6868 CURVNET_RESTORE(); 6869 } 6870 VNET_LIST_RUNLOCK_NOSLEEP(); 6871 } 6872 6873 /* 6874 * start a new iterator 6875 * iterates through all endpoints and associations based on the pcb_state 6876 * flags and asoc_state. "af" (mandatory) is executed for all matching 6877 * assocs and "ef" (optional) is executed when the iterator completes. 6878 * "inpf" (optional) is executed for each new endpoint as it is being 6879 * iterated through. inpe (optional) is called when the inp completes 6880 * its way through all the stcbs. 6881 */ 6882 int 6883 sctp_initiate_iterator(inp_func inpf, 6884 asoc_func af, 6885 inp_func inpe, 6886 uint32_t pcb_state, 6887 uint32_t pcb_features, 6888 uint32_t asoc_state, 6889 void *argp, 6890 uint32_t argi, 6891 end_func ef, 6892 struct sctp_inpcb *s_inp, 6893 uint8_t chunk_output_off) 6894 { 6895 struct sctp_iterator *it = NULL; 6896 6897 if (af == NULL) { 6898 return (-1); 6899 } 6900 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6901 SCTP_M_ITER); 6902 if (it == NULL) { 6903 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6904 return (ENOMEM); 6905 } 6906 memset(it, 0, sizeof(*it)); 6907 it->function_assoc = af; 6908 it->function_inp = inpf; 6909 if (inpf) 6910 it->done_current_ep = 0; 6911 else 6912 it->done_current_ep = 1; 6913 it->function_atend = ef; 6914 it->pointer = argp; 6915 it->val = argi; 6916 it->pcb_flags = pcb_state; 6917 it->pcb_features = pcb_features; 6918 it->asoc_state = asoc_state; 6919 it->function_inp_end = inpe; 6920 it->no_chunk_output = chunk_output_off; 6921 it->vn = curvnet; 6922 if (s_inp) { 6923 /* Assume lock is held here */ 6924 it->inp = s_inp; 6925 SCTP_INP_INCR_REF(it->inp); 6926 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6927 } else { 6928 SCTP_INP_INFO_RLOCK(); 6929 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6930 if (it->inp) { 6931 SCTP_INP_INCR_REF(it->inp); 6932 } 6933 SCTP_INP_INFO_RUNLOCK(); 6934 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6935 6936 } 6937 SCTP_IPI_ITERATOR_WQ_LOCK(); 6938 6939 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6940 if (sctp_it_ctl.iterator_running == 0) { 6941 sctp_wakeup_iterator(); 6942 } 6943 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6944 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6945 return (0); 6946 } 6947