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 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 776 vrf->total_ifa_count--; 777 LIST_REMOVE(sctp_ifap, next_bucket); 778 sctp_remove_ifa_from_ifn(sctp_ifap); 779 } 780 #ifdef SCTP_DEBUG 781 else { 782 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 783 ifn_index); 784 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 785 } 786 #endif 787 788 out_now: 789 SCTP_IPI_ADDR_WUNLOCK(); 790 if (sctp_ifap) { 791 struct sctp_laddr *wi; 792 793 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 794 if (wi == NULL) { 795 /* 796 * Gak, what can we do? We have lost an address 797 * change can you say HOSED? 798 */ 799 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 800 801 /* Oops, must decrement the count */ 802 sctp_free_ifa(sctp_ifap); 803 return; 804 } 805 SCTP_INCR_LADDR_COUNT(); 806 bzero(wi, sizeof(*wi)); 807 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 808 wi->ifa = sctp_ifap; 809 wi->action = SCTP_DEL_IP_ADDRESS; 810 SCTP_WQ_ADDR_LOCK(); 811 /* 812 * Should this really be a tailq? As it is we will process 813 * the newest first :-0 814 */ 815 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 816 SCTP_WQ_ADDR_UNLOCK(); 817 818 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 819 (struct sctp_inpcb *)NULL, 820 (struct sctp_tcb *)NULL, 821 (struct sctp_nets *)NULL); 822 } 823 return; 824 } 825 826 827 static int 828 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 829 { 830 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 831 int ipv4_addr_legal, ipv6_addr_legal; 832 struct sctp_vrf *vrf; 833 struct sctp_ifn *sctp_ifn; 834 struct sctp_ifa *sctp_ifa; 835 836 loopback_scope = stcb->asoc.scope.loopback_scope; 837 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 838 local_scope = stcb->asoc.scope.local_scope; 839 site_scope = stcb->asoc.scope.site_scope; 840 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 841 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 842 843 SCTP_IPI_ADDR_RLOCK(); 844 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 845 if (vrf == NULL) { 846 /* no vrf, no addresses */ 847 SCTP_IPI_ADDR_RUNLOCK(); 848 return (0); 849 } 850 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 851 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 852 if ((loopback_scope == 0) && 853 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 854 continue; 855 } 856 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 857 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 858 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 859 /* 860 * We allow pending addresses, where 861 * we have sent an asconf-add to be 862 * considered valid. 863 */ 864 continue; 865 } 866 switch (sctp_ifa->address.sa.sa_family) { 867 #ifdef INET 868 case AF_INET: 869 if (ipv4_addr_legal) { 870 struct sockaddr_in *sin, 871 *rsin; 872 873 sin = &sctp_ifa->address.sin; 874 rsin = (struct sockaddr_in *)to; 875 if ((ipv4_local_scope == 0) && 876 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 877 continue; 878 } 879 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 880 SCTP_IPI_ADDR_RUNLOCK(); 881 return (1); 882 } 883 } 884 break; 885 #endif 886 #ifdef INET6 887 case AF_INET6: 888 if (ipv6_addr_legal) { 889 struct sockaddr_in6 *sin6, 890 *rsin6; 891 892 sin6 = &sctp_ifa->address.sin6; 893 rsin6 = (struct sockaddr_in6 *)to; 894 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 895 if (local_scope == 0) 896 continue; 897 if (sin6->sin6_scope_id == 0) { 898 if (sa6_recoverscope(sin6) != 0) 899 continue; 900 } 901 } 902 if ((site_scope == 0) && 903 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 904 continue; 905 } 906 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 907 SCTP_IPI_ADDR_RUNLOCK(); 908 return (1); 909 } 910 } 911 break; 912 #endif 913 default: 914 /* TSNH */ 915 break; 916 } 917 } 918 } 919 } else { 920 struct sctp_laddr *laddr; 921 922 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 923 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 924 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 925 continue; 926 } 927 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 928 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 929 /* 930 * We allow pending addresses, where we have 931 * sent an asconf-add to be considered 932 * valid. 933 */ 934 continue; 935 } 936 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 937 continue; 938 } 939 switch (to->sa_family) { 940 #ifdef INET 941 case AF_INET: 942 { 943 struct sockaddr_in *sin, *rsin; 944 945 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 946 rsin = (struct sockaddr_in *)to; 947 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 948 SCTP_IPI_ADDR_RUNLOCK(); 949 return (1); 950 } 951 break; 952 } 953 #endif 954 #ifdef INET6 955 case AF_INET6: 956 { 957 struct sockaddr_in6 *sin6, *rsin6; 958 959 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 960 rsin6 = (struct sockaddr_in6 *)to; 961 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 962 SCTP_IPI_ADDR_RUNLOCK(); 963 return (1); 964 } 965 break; 966 } 967 968 #endif 969 default: 970 /* TSNH */ 971 break; 972 } 973 974 } 975 } 976 SCTP_IPI_ADDR_RUNLOCK(); 977 return (0); 978 } 979 980 981 static struct sctp_tcb * 982 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 983 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 984 { 985 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 986 /* 987 * If we support the TCP model, then we must now dig through to see 988 * if we can find our endpoint in the list of tcp ep's. 989 */ 990 uint16_t lport, rport; 991 struct sctppcbhead *ephead; 992 struct sctp_inpcb *inp; 993 struct sctp_laddr *laddr; 994 struct sctp_tcb *stcb; 995 struct sctp_nets *net; 996 997 if ((to == NULL) || (from == NULL)) { 998 return (NULL); 999 } 1000 switch (to->sa_family) { 1001 #ifdef INET 1002 case AF_INET: 1003 if (from->sa_family == AF_INET) { 1004 lport = ((struct sockaddr_in *)to)->sin_port; 1005 rport = ((struct sockaddr_in *)from)->sin_port; 1006 } else { 1007 return (NULL); 1008 } 1009 break; 1010 #endif 1011 #ifdef INET6 1012 case AF_INET6: 1013 if (from->sa_family == AF_INET6) { 1014 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1015 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1016 } else { 1017 return (NULL); 1018 } 1019 break; 1020 #endif 1021 default: 1022 return (NULL); 1023 } 1024 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1025 /* 1026 * Ok now for each of the guys in this bucket we must look and see: 1027 * - Does the remote port match. - Does there single association's 1028 * addresses match this address (to). If so we update p_ep to point 1029 * to this ep and return the tcb from it. 1030 */ 1031 LIST_FOREACH(inp, ephead, sctp_hash) { 1032 SCTP_INP_RLOCK(inp); 1033 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1034 SCTP_INP_RUNLOCK(inp); 1035 continue; 1036 } 1037 if (lport != inp->sctp_lport) { 1038 SCTP_INP_RUNLOCK(inp); 1039 continue; 1040 } 1041 if (inp->def_vrf_id != vrf_id) { 1042 SCTP_INP_RUNLOCK(inp); 1043 continue; 1044 } 1045 /* check to see if the ep has one of the addresses */ 1046 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1047 /* We are NOT bound all, so look further */ 1048 int match = 0; 1049 1050 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1051 1052 if (laddr->ifa == NULL) { 1053 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 1054 continue; 1055 } 1056 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1057 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1058 continue; 1059 } 1060 if (laddr->ifa->address.sa.sa_family == 1061 to->sa_family) { 1062 /* see if it matches */ 1063 #ifdef INET 1064 if (from->sa_family == AF_INET) { 1065 struct sockaddr_in *intf_addr, 1066 *sin; 1067 1068 intf_addr = &laddr->ifa->address.sin; 1069 sin = (struct sockaddr_in *)to; 1070 if (sin->sin_addr.s_addr == 1071 intf_addr->sin_addr.s_addr) { 1072 match = 1; 1073 break; 1074 } 1075 } 1076 #endif 1077 #ifdef INET6 1078 if (from->sa_family == AF_INET6) { 1079 struct sockaddr_in6 *intf_addr6; 1080 struct sockaddr_in6 *sin6; 1081 1082 sin6 = (struct sockaddr_in6 *) 1083 to; 1084 intf_addr6 = &laddr->ifa->address.sin6; 1085 1086 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1087 intf_addr6)) { 1088 match = 1; 1089 break; 1090 } 1091 } 1092 #endif 1093 } 1094 } 1095 if (match == 0) { 1096 /* This endpoint does not have this address */ 1097 SCTP_INP_RUNLOCK(inp); 1098 continue; 1099 } 1100 } 1101 /* 1102 * Ok if we hit here the ep has the address, does it hold 1103 * the tcb? 1104 */ 1105 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1106 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1107 if (stcb == NULL) { 1108 SCTP_INP_RUNLOCK(inp); 1109 continue; 1110 } 1111 SCTP_TCB_LOCK(stcb); 1112 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1113 SCTP_TCB_UNLOCK(stcb); 1114 SCTP_INP_RUNLOCK(inp); 1115 continue; 1116 } 1117 if (stcb->rport != rport) { 1118 /* remote port does not match. */ 1119 SCTP_TCB_UNLOCK(stcb); 1120 SCTP_INP_RUNLOCK(inp); 1121 continue; 1122 } 1123 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1124 SCTP_TCB_UNLOCK(stcb); 1125 SCTP_INP_RUNLOCK(inp); 1126 continue; 1127 } 1128 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1129 SCTP_TCB_UNLOCK(stcb); 1130 SCTP_INP_RUNLOCK(inp); 1131 continue; 1132 } 1133 /* Does this TCB have a matching address? */ 1134 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1135 1136 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1137 /* not the same family, can't be a match */ 1138 continue; 1139 } 1140 switch (from->sa_family) { 1141 #ifdef INET 1142 case AF_INET: 1143 { 1144 struct sockaddr_in *sin, *rsin; 1145 1146 sin = (struct sockaddr_in *)&net->ro._l_addr; 1147 rsin = (struct sockaddr_in *)from; 1148 if (sin->sin_addr.s_addr == 1149 rsin->sin_addr.s_addr) { 1150 /* found it */ 1151 if (netp != NULL) { 1152 *netp = net; 1153 } 1154 /* 1155 * Update the endpoint 1156 * pointer 1157 */ 1158 *inp_p = inp; 1159 SCTP_INP_RUNLOCK(inp); 1160 return (stcb); 1161 } 1162 break; 1163 } 1164 #endif 1165 #ifdef INET6 1166 case AF_INET6: 1167 { 1168 struct sockaddr_in6 *sin6, *rsin6; 1169 1170 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1171 rsin6 = (struct sockaddr_in6 *)from; 1172 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1173 rsin6)) { 1174 /* found it */ 1175 if (netp != NULL) { 1176 *netp = net; 1177 } 1178 /* 1179 * Update the endpoint 1180 * pointer 1181 */ 1182 *inp_p = inp; 1183 SCTP_INP_RUNLOCK(inp); 1184 return (stcb); 1185 } 1186 break; 1187 } 1188 #endif 1189 default: 1190 /* TSNH */ 1191 break; 1192 } 1193 } 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 } 1197 return (NULL); 1198 } 1199 1200 1201 /* 1202 * rules for use 1203 * 1204 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1205 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1206 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1207 * NULL. 1208 */ 1209 1210 struct sctp_tcb * 1211 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1212 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1213 { 1214 struct sctpasochead *head; 1215 struct sctp_inpcb *inp; 1216 struct sctp_tcb *stcb = NULL; 1217 struct sctp_nets *net; 1218 uint16_t rport; 1219 1220 inp = *inp_p; 1221 switch (remote->sa_family) { 1222 #ifdef INET 1223 case AF_INET: 1224 rport = (((struct sockaddr_in *)remote)->sin_port); 1225 break; 1226 #endif 1227 #ifdef INET6 1228 case AF_INET6: 1229 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1230 break; 1231 #endif 1232 default: 1233 return (NULL); 1234 } 1235 if (locked_tcb) { 1236 /* 1237 * UN-lock so we can do proper locking here this occurs when 1238 * called from load_addresses_from_init. 1239 */ 1240 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1241 SCTP_TCB_UNLOCK(locked_tcb); 1242 } 1243 SCTP_INP_INFO_RLOCK(); 1244 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1245 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1246 /*- 1247 * Now either this guy is our listener or it's the 1248 * connector. If it is the one that issued the connect, then 1249 * it's only chance is to be the first TCB in the list. If 1250 * it is the acceptor, then do the special_lookup to hash 1251 * and find the real inp. 1252 */ 1253 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1254 /* to is peer addr, from is my addr */ 1255 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1256 netp, inp->def_vrf_id); 1257 if ((stcb != NULL) && (locked_tcb == NULL)) { 1258 /* we have a locked tcb, lower refcount */ 1259 SCTP_INP_DECR_REF(inp); 1260 } 1261 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1262 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1263 SCTP_TCB_LOCK(locked_tcb); 1264 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1265 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1266 } 1267 SCTP_INP_INFO_RUNLOCK(); 1268 return (stcb); 1269 } else { 1270 SCTP_INP_WLOCK(inp); 1271 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1272 goto null_return; 1273 } 1274 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1275 if (stcb == NULL) { 1276 goto null_return; 1277 } 1278 SCTP_TCB_LOCK(stcb); 1279 1280 if (stcb->rport != rport) { 1281 /* remote port does not match. */ 1282 SCTP_TCB_UNLOCK(stcb); 1283 goto null_return; 1284 } 1285 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1286 SCTP_TCB_UNLOCK(stcb); 1287 goto null_return; 1288 } 1289 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1290 SCTP_TCB_UNLOCK(stcb); 1291 goto null_return; 1292 } 1293 /* now look at the list of remote addresses */ 1294 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1295 #ifdef INVARIANTS 1296 if (net == (TAILQ_NEXT(net, sctp_next))) { 1297 panic("Corrupt net list"); 1298 } 1299 #endif 1300 if (net->ro._l_addr.sa.sa_family != 1301 remote->sa_family) { 1302 /* not the same family */ 1303 continue; 1304 } 1305 switch (remote->sa_family) { 1306 #ifdef INET 1307 case AF_INET: 1308 { 1309 struct sockaddr_in *sin, 1310 *rsin; 1311 1312 sin = (struct sockaddr_in *) 1313 &net->ro._l_addr; 1314 rsin = (struct sockaddr_in *)remote; 1315 if (sin->sin_addr.s_addr == 1316 rsin->sin_addr.s_addr) { 1317 /* found it */ 1318 if (netp != NULL) { 1319 *netp = net; 1320 } 1321 if (locked_tcb == NULL) { 1322 SCTP_INP_DECR_REF(inp); 1323 } else if (locked_tcb != stcb) { 1324 SCTP_TCB_LOCK(locked_tcb); 1325 } 1326 if (locked_tcb) { 1327 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1328 } 1329 SCTP_INP_WUNLOCK(inp); 1330 SCTP_INP_INFO_RUNLOCK(); 1331 return (stcb); 1332 } 1333 break; 1334 } 1335 #endif 1336 #ifdef INET6 1337 case AF_INET6: 1338 { 1339 struct sockaddr_in6 *sin6, 1340 *rsin6; 1341 1342 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1343 rsin6 = (struct sockaddr_in6 *)remote; 1344 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1345 rsin6)) { 1346 /* found it */ 1347 if (netp != NULL) { 1348 *netp = net; 1349 } 1350 if (locked_tcb == NULL) { 1351 SCTP_INP_DECR_REF(inp); 1352 } else if (locked_tcb != stcb) { 1353 SCTP_TCB_LOCK(locked_tcb); 1354 } 1355 if (locked_tcb) { 1356 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1357 } 1358 SCTP_INP_WUNLOCK(inp); 1359 SCTP_INP_INFO_RUNLOCK(); 1360 return (stcb); 1361 } 1362 break; 1363 } 1364 #endif 1365 default: 1366 /* TSNH */ 1367 break; 1368 } 1369 } 1370 SCTP_TCB_UNLOCK(stcb); 1371 } 1372 } else { 1373 SCTP_INP_WLOCK(inp); 1374 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1375 goto null_return; 1376 } 1377 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1378 inp->sctp_hashmark)]; 1379 if (head == NULL) { 1380 goto null_return; 1381 } 1382 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1383 if (stcb->rport != rport) { 1384 /* remote port does not match */ 1385 continue; 1386 } 1387 SCTP_TCB_LOCK(stcb); 1388 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1389 SCTP_TCB_UNLOCK(stcb); 1390 continue; 1391 } 1392 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1393 SCTP_TCB_UNLOCK(stcb); 1394 continue; 1395 } 1396 /* now look at the list of remote addresses */ 1397 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1398 #ifdef INVARIANTS 1399 if (net == (TAILQ_NEXT(net, sctp_next))) { 1400 panic("Corrupt net list"); 1401 } 1402 #endif 1403 if (net->ro._l_addr.sa.sa_family != 1404 remote->sa_family) { 1405 /* not the same family */ 1406 continue; 1407 } 1408 switch (remote->sa_family) { 1409 #ifdef INET 1410 case AF_INET: 1411 { 1412 struct sockaddr_in *sin, 1413 *rsin; 1414 1415 sin = (struct sockaddr_in *) 1416 &net->ro._l_addr; 1417 rsin = (struct sockaddr_in *)remote; 1418 if (sin->sin_addr.s_addr == 1419 rsin->sin_addr.s_addr) { 1420 /* found it */ 1421 if (netp != NULL) { 1422 *netp = net; 1423 } 1424 if (locked_tcb == NULL) { 1425 SCTP_INP_DECR_REF(inp); 1426 } else if (locked_tcb != stcb) { 1427 SCTP_TCB_LOCK(locked_tcb); 1428 } 1429 if (locked_tcb) { 1430 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1431 } 1432 SCTP_INP_WUNLOCK(inp); 1433 SCTP_INP_INFO_RUNLOCK(); 1434 return (stcb); 1435 } 1436 break; 1437 } 1438 #endif 1439 #ifdef INET6 1440 case AF_INET6: 1441 { 1442 struct sockaddr_in6 *sin6, 1443 *rsin6; 1444 1445 sin6 = (struct sockaddr_in6 *) 1446 &net->ro._l_addr; 1447 rsin6 = (struct sockaddr_in6 *)remote; 1448 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1449 rsin6)) { 1450 /* found it */ 1451 if (netp != NULL) { 1452 *netp = net; 1453 } 1454 if (locked_tcb == NULL) { 1455 SCTP_INP_DECR_REF(inp); 1456 } else if (locked_tcb != stcb) { 1457 SCTP_TCB_LOCK(locked_tcb); 1458 } 1459 if (locked_tcb) { 1460 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1461 } 1462 SCTP_INP_WUNLOCK(inp); 1463 SCTP_INP_INFO_RUNLOCK(); 1464 return (stcb); 1465 } 1466 break; 1467 } 1468 #endif 1469 default: 1470 /* TSNH */ 1471 break; 1472 } 1473 } 1474 SCTP_TCB_UNLOCK(stcb); 1475 } 1476 } 1477 null_return: 1478 /* clean up for returning null */ 1479 if (locked_tcb) { 1480 SCTP_TCB_LOCK(locked_tcb); 1481 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1482 } 1483 SCTP_INP_WUNLOCK(inp); 1484 SCTP_INP_INFO_RUNLOCK(); 1485 /* not found */ 1486 return (NULL); 1487 } 1488 1489 1490 /* 1491 * Find an association for a specific endpoint using the association id given 1492 * out in the COMM_UP notification 1493 */ 1494 struct sctp_tcb * 1495 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1496 { 1497 /* 1498 * Use my the assoc_id to find a endpoint 1499 */ 1500 struct sctpasochead *head; 1501 struct sctp_tcb *stcb; 1502 uint32_t id; 1503 1504 if (inp == NULL) { 1505 SCTP_PRINTF("TSNH ep_associd\n"); 1506 return (NULL); 1507 } 1508 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1509 SCTP_PRINTF("TSNH ep_associd0\n"); 1510 return (NULL); 1511 } 1512 id = (uint32_t) asoc_id; 1513 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1514 if (head == NULL) { 1515 /* invalid id TSNH */ 1516 SCTP_PRINTF("TSNH ep_associd1\n"); 1517 return (NULL); 1518 } 1519 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1520 if (stcb->asoc.assoc_id == id) { 1521 if (inp != stcb->sctp_ep) { 1522 /* 1523 * some other guy has the same id active (id 1524 * collision ??). 1525 */ 1526 SCTP_PRINTF("TSNH ep_associd2\n"); 1527 continue; 1528 } 1529 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1530 continue; 1531 } 1532 if (want_lock) { 1533 SCTP_TCB_LOCK(stcb); 1534 } 1535 return (stcb); 1536 } 1537 } 1538 return (NULL); 1539 } 1540 1541 1542 struct sctp_tcb * 1543 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1544 { 1545 struct sctp_tcb *stcb; 1546 1547 SCTP_INP_RLOCK(inp); 1548 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1549 SCTP_INP_RUNLOCK(inp); 1550 return (stcb); 1551 } 1552 1553 1554 /* 1555 * Endpoint probe expects that the INP_INFO is locked. 1556 */ 1557 static struct sctp_inpcb * 1558 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1559 uint16_t lport, uint32_t vrf_id) 1560 { 1561 struct sctp_inpcb *inp; 1562 struct sctp_laddr *laddr; 1563 1564 #ifdef INET 1565 struct sockaddr_in *sin; 1566 1567 #endif 1568 #ifdef INET6 1569 struct sockaddr_in6 *sin6; 1570 struct sockaddr_in6 *intf_addr6; 1571 1572 #endif 1573 int fnd; 1574 1575 #ifdef INET 1576 sin = NULL; 1577 #endif 1578 #ifdef INET6 1579 sin6 = NULL; 1580 #endif 1581 switch (nam->sa_family) { 1582 #ifdef INET 1583 case AF_INET: 1584 sin = (struct sockaddr_in *)nam; 1585 break; 1586 #endif 1587 #ifdef INET6 1588 case AF_INET6: 1589 sin6 = (struct sockaddr_in6 *)nam; 1590 break; 1591 #endif 1592 default: 1593 /* unsupported family */ 1594 return (NULL); 1595 } 1596 1597 if (head == NULL) 1598 return (NULL); 1599 1600 LIST_FOREACH(inp, head, sctp_hash) { 1601 SCTP_INP_RLOCK(inp); 1602 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1603 SCTP_INP_RUNLOCK(inp); 1604 continue; 1605 } 1606 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1607 (inp->sctp_lport == lport)) { 1608 /* got it */ 1609 #ifdef INET 1610 if ((nam->sa_family == AF_INET) && 1611 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1612 SCTP_IPV6_V6ONLY(inp)) { 1613 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1614 SCTP_INP_RUNLOCK(inp); 1615 continue; 1616 } 1617 #endif 1618 #ifdef INET6 1619 /* A V6 address and the endpoint is NOT bound V6 */ 1620 if (nam->sa_family == AF_INET6 && 1621 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1622 SCTP_INP_RUNLOCK(inp); 1623 continue; 1624 } 1625 #endif 1626 /* does a VRF id match? */ 1627 fnd = 0; 1628 if (inp->def_vrf_id == vrf_id) 1629 fnd = 1; 1630 1631 SCTP_INP_RUNLOCK(inp); 1632 if (!fnd) 1633 continue; 1634 return (inp); 1635 } 1636 SCTP_INP_RUNLOCK(inp); 1637 } 1638 switch (nam->sa_family) { 1639 #ifdef INET 1640 case AF_INET: 1641 if (sin->sin_addr.s_addr == INADDR_ANY) { 1642 /* Can't hunt for one that has no address specified */ 1643 return (NULL); 1644 } 1645 break; 1646 #endif 1647 #ifdef INET6 1648 case AF_INET6: 1649 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1650 /* Can't hunt for one that has no address specified */ 1651 return (NULL); 1652 } 1653 break; 1654 #endif 1655 default: 1656 break; 1657 } 1658 /* 1659 * ok, not bound to all so see if we can find a EP bound to this 1660 * address. 1661 */ 1662 LIST_FOREACH(inp, head, sctp_hash) { 1663 SCTP_INP_RLOCK(inp); 1664 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1665 SCTP_INP_RUNLOCK(inp); 1666 continue; 1667 } 1668 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1669 SCTP_INP_RUNLOCK(inp); 1670 continue; 1671 } 1672 /* 1673 * Ok this could be a likely candidate, look at all of its 1674 * addresses 1675 */ 1676 if (inp->sctp_lport != lport) { 1677 SCTP_INP_RUNLOCK(inp); 1678 continue; 1679 } 1680 /* does a VRF id match? */ 1681 fnd = 0; 1682 if (inp->def_vrf_id == vrf_id) 1683 fnd = 1; 1684 1685 if (!fnd) { 1686 SCTP_INP_RUNLOCK(inp); 1687 continue; 1688 } 1689 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1690 if (laddr->ifa == NULL) { 1691 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1692 __FUNCTION__); 1693 continue; 1694 } 1695 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1696 (void *)laddr->ifa); 1697 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1698 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1699 continue; 1700 } 1701 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1702 /* possible, see if it matches */ 1703 switch (nam->sa_family) { 1704 #ifdef INET 1705 case AF_INET: 1706 if (sin->sin_addr.s_addr == 1707 laddr->ifa->address.sin.sin_addr.s_addr) { 1708 SCTP_INP_RUNLOCK(inp); 1709 return (inp); 1710 } 1711 break; 1712 #endif 1713 #ifdef INET6 1714 case AF_INET6: 1715 intf_addr6 = &laddr->ifa->address.sin6; 1716 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1717 intf_addr6)) { 1718 SCTP_INP_RUNLOCK(inp); 1719 return (inp); 1720 } 1721 break; 1722 #endif 1723 } 1724 } 1725 } 1726 SCTP_INP_RUNLOCK(inp); 1727 } 1728 return (NULL); 1729 } 1730 1731 1732 static struct sctp_inpcb * 1733 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1734 { 1735 struct sctppcbhead *head; 1736 struct sctp_inpcb *t_inp; 1737 int fnd; 1738 1739 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1740 SCTP_BASE_INFO(hashmark))]; 1741 LIST_FOREACH(t_inp, head, sctp_hash) { 1742 if (t_inp->sctp_lport != lport) { 1743 continue; 1744 } 1745 /* is it in the VRF in question */ 1746 fnd = 0; 1747 if (t_inp->def_vrf_id == vrf_id) 1748 fnd = 1; 1749 if (!fnd) 1750 continue; 1751 1752 /* This one is in use. */ 1753 /* check the v6/v4 binding issue */ 1754 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1755 SCTP_IPV6_V6ONLY(t_inp)) { 1756 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1757 /* collision in V6 space */ 1758 return (t_inp); 1759 } else { 1760 /* inp is BOUND_V4 no conflict */ 1761 continue; 1762 } 1763 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1764 /* t_inp is bound v4 and v6, conflict always */ 1765 return (t_inp); 1766 } else { 1767 /* t_inp is bound only V4 */ 1768 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1769 SCTP_IPV6_V6ONLY(inp)) { 1770 /* no conflict */ 1771 continue; 1772 } 1773 /* else fall through to conflict */ 1774 } 1775 return (t_inp); 1776 } 1777 return (NULL); 1778 } 1779 1780 1781 int 1782 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1783 { 1784 /* For 1-2-1 with port reuse */ 1785 struct sctppcbhead *head; 1786 struct sctp_inpcb *tinp; 1787 1788 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1789 /* only works with port reuse on */ 1790 return (-1); 1791 } 1792 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1793 return (0); 1794 } 1795 SCTP_INP_RUNLOCK(inp); 1796 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1797 SCTP_BASE_INFO(hashmark))]; 1798 /* Kick out all non-listeners to the TCP hash */ 1799 LIST_FOREACH(tinp, head, sctp_hash) { 1800 if (tinp->sctp_lport != inp->sctp_lport) { 1801 continue; 1802 } 1803 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1804 continue; 1805 } 1806 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1807 continue; 1808 } 1809 if (tinp->sctp_socket->so_qlimit) { 1810 continue; 1811 } 1812 SCTP_INP_WLOCK(tinp); 1813 LIST_REMOVE(tinp, sctp_hash); 1814 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1815 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1816 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1817 SCTP_INP_WUNLOCK(tinp); 1818 } 1819 SCTP_INP_WLOCK(inp); 1820 /* Pull from where he was */ 1821 LIST_REMOVE(inp, sctp_hash); 1822 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1823 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1824 LIST_INSERT_HEAD(head, inp, sctp_hash); 1825 SCTP_INP_WUNLOCK(inp); 1826 SCTP_INP_RLOCK(inp); 1827 return (0); 1828 } 1829 1830 1831 struct sctp_inpcb * 1832 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1833 uint32_t vrf_id) 1834 { 1835 /* 1836 * First we check the hash table to see if someone has this port 1837 * bound with just the port. 1838 */ 1839 struct sctp_inpcb *inp; 1840 struct sctppcbhead *head; 1841 int lport; 1842 unsigned int i; 1843 1844 #ifdef INET 1845 struct sockaddr_in *sin; 1846 1847 #endif 1848 #ifdef INET6 1849 struct sockaddr_in6 *sin6; 1850 1851 #endif 1852 1853 switch (nam->sa_family) { 1854 #ifdef INET 1855 case AF_INET: 1856 sin = (struct sockaddr_in *)nam; 1857 lport = sin->sin_port; 1858 break; 1859 #endif 1860 #ifdef INET6 1861 case AF_INET6: 1862 sin6 = (struct sockaddr_in6 *)nam; 1863 lport = sin6->sin6_port; 1864 break; 1865 #endif 1866 default: 1867 return (NULL); 1868 } 1869 /* 1870 * I could cheat here and just cast to one of the types but we will 1871 * do it right. It also provides the check against an Unsupported 1872 * type too. 1873 */ 1874 /* Find the head of the ALLADDR chain */ 1875 if (have_lock == 0) { 1876 SCTP_INP_INFO_RLOCK(); 1877 } 1878 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1879 SCTP_BASE_INFO(hashmark))]; 1880 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1881 1882 /* 1883 * If the TCP model exists it could be that the main listening 1884 * endpoint is gone but there still exists a connected socket for 1885 * this guy. If so we can return the first one that we find. This 1886 * may NOT be the correct one so the caller should be wary on the 1887 * returned INP. Currently the only caller that sets find_tcp_pool 1888 * is in bindx where we are verifying that a user CAN bind the 1889 * address. He either has bound it already, or someone else has, or 1890 * its open to bind, so this is good enough. 1891 */ 1892 if (inp == NULL && find_tcp_pool) { 1893 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1894 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1895 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1896 if (inp) { 1897 break; 1898 } 1899 } 1900 } 1901 if (inp) { 1902 SCTP_INP_INCR_REF(inp); 1903 } 1904 if (have_lock == 0) { 1905 SCTP_INP_INFO_RUNLOCK(); 1906 } 1907 return (inp); 1908 } 1909 1910 1911 /* 1912 * Find an association for an endpoint with the pointer to whom you want to 1913 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1914 * need to change the *to to some other struct like a mbuf... 1915 */ 1916 struct sctp_tcb * 1917 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1918 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1919 uint32_t vrf_id) 1920 { 1921 struct sctp_inpcb *inp = NULL; 1922 struct sctp_tcb *stcb; 1923 1924 SCTP_INP_INFO_RLOCK(); 1925 if (find_tcp_pool) { 1926 if (inp_p != NULL) { 1927 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1928 vrf_id); 1929 } else { 1930 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1931 vrf_id); 1932 } 1933 if (stcb != NULL) { 1934 SCTP_INP_INFO_RUNLOCK(); 1935 return (stcb); 1936 } 1937 } 1938 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1939 if (inp_p != NULL) { 1940 *inp_p = inp; 1941 } 1942 SCTP_INP_INFO_RUNLOCK(); 1943 if (inp == NULL) { 1944 return (NULL); 1945 } 1946 /* 1947 * ok, we have an endpoint, now lets find the assoc for it (if any) 1948 * we now place the source address or from in the to of the find 1949 * endpoint call. Since in reality this chain is used from the 1950 * inbound packet side. 1951 */ 1952 if (inp_p != NULL) { 1953 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1954 NULL); 1955 } else { 1956 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 1957 NULL); 1958 } 1959 return (stcb); 1960 } 1961 1962 1963 /* 1964 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1965 * find all addresses that the sender has specified in any address list. Each 1966 * address will be used to lookup the TCB and see if one exits. 1967 */ 1968 static struct sctp_tcb * 1969 sctp_findassociation_special_addr(struct mbuf *m, int offset, 1970 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1971 struct sockaddr *dst) 1972 { 1973 struct sctp_paramhdr *phdr, parm_buf; 1974 struct sctp_tcb *stcb; 1975 uint32_t ptype, plen; 1976 1977 #ifdef INET 1978 struct sockaddr_in sin4; 1979 1980 #endif 1981 #ifdef INET6 1982 struct sockaddr_in6 sin6; 1983 1984 #endif 1985 1986 #ifdef INET 1987 memset(&sin4, 0, sizeof(sin4)); 1988 sin4.sin_len = sizeof(sin4); 1989 sin4.sin_family = AF_INET; 1990 sin4.sin_port = sh->src_port; 1991 #endif 1992 #ifdef INET6 1993 memset(&sin6, 0, sizeof(sin6)); 1994 sin6.sin6_len = sizeof(sin6); 1995 sin6.sin6_family = AF_INET6; 1996 sin6.sin6_port = sh->src_port; 1997 #endif 1998 1999 stcb = NULL; 2000 offset += sizeof(struct sctp_init_chunk); 2001 2002 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2003 while (phdr != NULL) { 2004 /* now we must see if we want the parameter */ 2005 ptype = ntohs(phdr->param_type); 2006 plen = ntohs(phdr->param_length); 2007 if (plen == 0) { 2008 break; 2009 } 2010 #ifdef INET 2011 if (ptype == SCTP_IPV4_ADDRESS && 2012 plen == sizeof(struct sctp_ipv4addr_param)) { 2013 /* Get the rest of the address */ 2014 struct sctp_ipv4addr_param ip4_parm, *p4; 2015 2016 phdr = sctp_get_next_param(m, offset, 2017 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2018 if (phdr == NULL) { 2019 return (NULL); 2020 } 2021 p4 = (struct sctp_ipv4addr_param *)phdr; 2022 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2023 /* look it up */ 2024 stcb = sctp_findassociation_ep_addr(inp_p, 2025 (struct sockaddr *)&sin4, netp, dst, NULL); 2026 if (stcb != NULL) { 2027 return (stcb); 2028 } 2029 } 2030 #endif 2031 #ifdef INET6 2032 if (ptype == SCTP_IPV6_ADDRESS && 2033 plen == sizeof(struct sctp_ipv6addr_param)) { 2034 /* Get the rest of the address */ 2035 struct sctp_ipv6addr_param ip6_parm, *p6; 2036 2037 phdr = sctp_get_next_param(m, offset, 2038 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2039 if (phdr == NULL) { 2040 return (NULL); 2041 } 2042 p6 = (struct sctp_ipv6addr_param *)phdr; 2043 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2044 /* look it up */ 2045 stcb = sctp_findassociation_ep_addr(inp_p, 2046 (struct sockaddr *)&sin6, netp, dst, NULL); 2047 if (stcb != NULL) { 2048 return (stcb); 2049 } 2050 } 2051 #endif 2052 offset += SCTP_SIZE32(plen); 2053 phdr = sctp_get_next_param(m, offset, &parm_buf, 2054 sizeof(parm_buf)); 2055 } 2056 return (NULL); 2057 } 2058 2059 static struct sctp_tcb * 2060 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2061 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2062 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2063 { 2064 /* 2065 * Use my vtag to hash. If we find it we then verify the source addr 2066 * is in the assoc. If all goes well we save a bit on rec of a 2067 * packet. 2068 */ 2069 struct sctpasochead *head; 2070 struct sctp_nets *net; 2071 struct sctp_tcb *stcb; 2072 2073 SCTP_INP_INFO_RLOCK(); 2074 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2075 SCTP_BASE_INFO(hashasocmark))]; 2076 if (head == NULL) { 2077 /* invalid vtag */ 2078 SCTP_INP_INFO_RUNLOCK(); 2079 return (NULL); 2080 } 2081 LIST_FOREACH(stcb, head, sctp_asocs) { 2082 SCTP_INP_RLOCK(stcb->sctp_ep); 2083 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2084 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2085 continue; 2086 } 2087 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2088 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2089 continue; 2090 } 2091 SCTP_TCB_LOCK(stcb); 2092 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2093 if (stcb->asoc.my_vtag == vtag) { 2094 /* candidate */ 2095 if (stcb->rport != rport) { 2096 SCTP_TCB_UNLOCK(stcb); 2097 continue; 2098 } 2099 if (stcb->sctp_ep->sctp_lport != lport) { 2100 SCTP_TCB_UNLOCK(stcb); 2101 continue; 2102 } 2103 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2104 SCTP_TCB_UNLOCK(stcb); 2105 continue; 2106 } 2107 /* RRS:Need toaddr check here */ 2108 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2109 /* Endpoint does not own this address */ 2110 SCTP_TCB_UNLOCK(stcb); 2111 continue; 2112 } 2113 if (remote_tag) { 2114 /* 2115 * If we have both vtags that's all we match 2116 * on 2117 */ 2118 if (stcb->asoc.peer_vtag == remote_tag) { 2119 /* 2120 * If both tags match we consider it 2121 * conclusive and check NO 2122 * source/destination addresses 2123 */ 2124 goto conclusive; 2125 } 2126 } 2127 if (skip_src_check) { 2128 conclusive: 2129 if (from) { 2130 *netp = sctp_findnet(stcb, from); 2131 } else { 2132 *netp = NULL; /* unknown */ 2133 } 2134 if (inp_p) 2135 *inp_p = stcb->sctp_ep; 2136 SCTP_INP_INFO_RUNLOCK(); 2137 return (stcb); 2138 } 2139 net = sctp_findnet(stcb, from); 2140 if (net) { 2141 /* yep its him. */ 2142 *netp = net; 2143 SCTP_STAT_INCR(sctps_vtagexpress); 2144 *inp_p = stcb->sctp_ep; 2145 SCTP_INP_INFO_RUNLOCK(); 2146 return (stcb); 2147 } else { 2148 /* 2149 * not him, this should only happen in rare 2150 * cases so I peg it. 2151 */ 2152 SCTP_STAT_INCR(sctps_vtagbogus); 2153 } 2154 } 2155 SCTP_TCB_UNLOCK(stcb); 2156 } 2157 SCTP_INP_INFO_RUNLOCK(); 2158 return (NULL); 2159 } 2160 2161 2162 /* 2163 * Find an association with the pointer to the inbound IP packet. This can be 2164 * a IPv4 or IPv6 packet. 2165 */ 2166 struct sctp_tcb * 2167 sctp_findassociation_addr(struct mbuf *m, int offset, 2168 struct sockaddr *src, struct sockaddr *dst, 2169 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2170 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2171 { 2172 int find_tcp_pool; 2173 struct sctp_tcb *stcb; 2174 struct sctp_inpcb *inp; 2175 2176 if (sh->v_tag) { 2177 /* we only go down this path if vtag is non-zero */ 2178 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2179 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2180 if (stcb) { 2181 return (stcb); 2182 } 2183 } 2184 find_tcp_pool = 0; 2185 if ((ch->chunk_type != SCTP_INITIATION) && 2186 (ch->chunk_type != SCTP_INITIATION_ACK) && 2187 (ch->chunk_type != SCTP_COOKIE_ACK) && 2188 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2189 /* Other chunk types go to the tcp pool. */ 2190 find_tcp_pool = 1; 2191 } 2192 if (inp_p) { 2193 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2194 find_tcp_pool, vrf_id); 2195 inp = *inp_p; 2196 } else { 2197 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2198 find_tcp_pool, vrf_id); 2199 } 2200 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2201 if (stcb == NULL && inp) { 2202 /* Found a EP but not this address */ 2203 if ((ch->chunk_type == SCTP_INITIATION) || 2204 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2205 /*- 2206 * special hook, we do NOT return linp or an 2207 * association that is linked to an existing 2208 * association that is under the TCP pool (i.e. no 2209 * listener exists). The endpoint finding routine 2210 * will always find a listener before examining the 2211 * TCP pool. 2212 */ 2213 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2214 if (inp_p) { 2215 *inp_p = NULL; 2216 } 2217 return (NULL); 2218 } 2219 stcb = sctp_findassociation_special_addr(m, 2220 offset, sh, &inp, netp, dst); 2221 if (inp_p != NULL) { 2222 *inp_p = inp; 2223 } 2224 } 2225 } 2226 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2227 return (stcb); 2228 } 2229 2230 /* 2231 * lookup an association by an ASCONF lookup address. 2232 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2233 */ 2234 struct sctp_tcb * 2235 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2236 struct sockaddr *dst, struct sctphdr *sh, 2237 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2238 { 2239 struct sctp_tcb *stcb; 2240 struct sockaddr_storage remote_store; 2241 struct sctp_paramhdr parm_buf, *phdr; 2242 int ptype; 2243 int zero_address = 0; 2244 2245 #ifdef INET 2246 struct sockaddr_in *sin; 2247 2248 #endif 2249 #ifdef INET6 2250 struct sockaddr_in6 *sin6; 2251 2252 #endif 2253 2254 memset(&remote_store, 0, sizeof(remote_store)); 2255 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2256 &parm_buf, sizeof(struct sctp_paramhdr)); 2257 if (phdr == NULL) { 2258 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2259 __FUNCTION__); 2260 return NULL; 2261 } 2262 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2263 /* get the correlation address */ 2264 switch (ptype) { 2265 #ifdef INET6 2266 case SCTP_IPV6_ADDRESS: 2267 { 2268 /* ipv6 address param */ 2269 struct sctp_ipv6addr_param *p6, p6_buf; 2270 2271 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2272 return NULL; 2273 } 2274 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2275 offset + sizeof(struct sctp_asconf_chunk), 2276 &p6_buf.ph, sizeof(*p6)); 2277 if (p6 == NULL) { 2278 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2279 __FUNCTION__); 2280 return (NULL); 2281 } 2282 sin6 = (struct sockaddr_in6 *)&remote_store; 2283 sin6->sin6_family = AF_INET6; 2284 sin6->sin6_len = sizeof(*sin6); 2285 sin6->sin6_port = sh->src_port; 2286 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2287 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2288 zero_address = 1; 2289 break; 2290 } 2291 #endif 2292 #ifdef INET 2293 case SCTP_IPV4_ADDRESS: 2294 { 2295 /* ipv4 address param */ 2296 struct sctp_ipv4addr_param *p4, p4_buf; 2297 2298 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2299 return NULL; 2300 } 2301 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2302 offset + sizeof(struct sctp_asconf_chunk), 2303 &p4_buf.ph, sizeof(*p4)); 2304 if (p4 == NULL) { 2305 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2306 __FUNCTION__); 2307 return (NULL); 2308 } 2309 sin = (struct sockaddr_in *)&remote_store; 2310 sin->sin_family = AF_INET; 2311 sin->sin_len = sizeof(*sin); 2312 sin->sin_port = sh->src_port; 2313 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2314 if (sin->sin_addr.s_addr == INADDR_ANY) 2315 zero_address = 1; 2316 break; 2317 } 2318 #endif 2319 default: 2320 /* invalid address param type */ 2321 return NULL; 2322 } 2323 2324 if (zero_address) { 2325 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2326 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2327 if (stcb != NULL) { 2328 SCTP_INP_DECR_REF(*inp_p); 2329 } 2330 } else { 2331 stcb = sctp_findassociation_ep_addr(inp_p, 2332 (struct sockaddr *)&remote_store, netp, 2333 dst, NULL); 2334 } 2335 return (stcb); 2336 } 2337 2338 2339 /* 2340 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2341 * addresses. This way if we don't get a bind we by default pick a ephemeral 2342 * port with all addresses bound. 2343 */ 2344 int 2345 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2346 { 2347 /* 2348 * we get called when a new endpoint starts up. We need to allocate 2349 * the sctp_inpcb structure from the zone and init it. Mark it as 2350 * unbound and find a port that we can use as an ephemeral with 2351 * INADDR_ANY. If the user binds later no problem we can then add in 2352 * the specific addresses. And setup the default parameters for the 2353 * EP. 2354 */ 2355 int i, error; 2356 struct sctp_inpcb *inp; 2357 struct sctp_pcb *m; 2358 struct timeval time; 2359 sctp_sharedkey_t *null_key; 2360 2361 error = 0; 2362 2363 SCTP_INP_INFO_WLOCK(); 2364 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2365 if (inp == NULL) { 2366 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2367 SCTP_INP_INFO_WUNLOCK(); 2368 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2369 return (ENOBUFS); 2370 } 2371 /* zap it */ 2372 bzero(inp, sizeof(*inp)); 2373 2374 /* bump generations */ 2375 /* setup socket pointers */ 2376 inp->sctp_socket = so; 2377 inp->ip_inp.inp.inp_socket = so; 2378 #ifdef INET6 2379 if (INP_SOCKAF(so) == AF_INET6) { 2380 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2381 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2382 } 2383 if (MODULE_GLOBAL(ip6_v6only)) { 2384 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2385 } 2386 } 2387 #endif 2388 inp->sctp_associd_counter = 1; 2389 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2390 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2391 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2392 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2393 /* init the small hash table we use to track asocid <-> tcb */ 2394 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2395 if (inp->sctp_asocidhash == NULL) { 2396 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2397 SCTP_INP_INFO_WUNLOCK(); 2398 return (ENOBUFS); 2399 } 2400 #ifdef IPSEC 2401 { 2402 struct inpcbpolicy *pcb_sp = NULL; 2403 2404 error = ipsec_init_policy(so, &pcb_sp); 2405 /* Arrange to share the policy */ 2406 inp->ip_inp.inp.inp_sp = pcb_sp; 2407 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2408 } 2409 if (error != 0) { 2410 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2411 SCTP_INP_INFO_WUNLOCK(); 2412 return error; 2413 } 2414 #endif /* IPSEC */ 2415 SCTP_INCR_EP_COUNT(); 2416 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2417 SCTP_INP_INFO_WUNLOCK(); 2418 2419 so->so_pcb = (caddr_t)inp; 2420 2421 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2422 /* UDP style socket */ 2423 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2424 SCTP_PCB_FLAGS_UNBOUND); 2425 /* Be sure it is NON-BLOCKING IO for UDP */ 2426 /* SCTP_SET_SO_NBIO(so); */ 2427 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2428 /* TCP style socket */ 2429 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2430 SCTP_PCB_FLAGS_UNBOUND); 2431 /* Be sure we have blocking IO by default */ 2432 SCTP_CLEAR_SO_NBIO(so); 2433 } else { 2434 /* 2435 * unsupported socket type (RAW, etc)- in case we missed it 2436 * in protosw 2437 */ 2438 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2439 so->so_pcb = NULL; 2440 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2441 return (EOPNOTSUPP); 2442 } 2443 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2444 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2445 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2446 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2447 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2448 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2449 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2450 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2451 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2452 } 2453 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2454 &inp->sctp_hashmark); 2455 if (inp->sctp_tcbhash == NULL) { 2456 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2457 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2458 so->so_pcb = NULL; 2459 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2460 return (ENOBUFS); 2461 } 2462 inp->def_vrf_id = vrf_id; 2463 2464 SCTP_INP_INFO_WLOCK(); 2465 SCTP_INP_LOCK_INIT(inp); 2466 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2467 SCTP_INP_READ_INIT(inp); 2468 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2469 /* lock the new ep */ 2470 SCTP_INP_WLOCK(inp); 2471 2472 /* add it to the info area */ 2473 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2474 SCTP_INP_INFO_WUNLOCK(); 2475 2476 TAILQ_INIT(&inp->read_queue); 2477 LIST_INIT(&inp->sctp_addr_list); 2478 2479 LIST_INIT(&inp->sctp_asoc_list); 2480 2481 #ifdef SCTP_TRACK_FREED_ASOCS 2482 /* TEMP CODE */ 2483 LIST_INIT(&inp->sctp_asoc_free_list); 2484 #endif 2485 /* Init the timer structure for signature change */ 2486 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2487 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2488 2489 /* now init the actual endpoint default data */ 2490 m = &inp->sctp_ep; 2491 2492 /* setup the base timeout information */ 2493 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2494 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2495 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2496 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2497 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2498 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2499 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2500 /* all max/min max are in ms */ 2501 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2502 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2503 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2504 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2505 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2506 2507 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2508 2509 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2510 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2511 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2512 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2513 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2514 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2515 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2516 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2517 2518 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2519 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2520 /* number of streams to pre-open on a association */ 2521 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2522 2523 /* Add adaptation cookie */ 2524 m->adaptation_layer_indicator = 0; 2525 m->adaptation_layer_indicator_provided = 0; 2526 2527 /* seed random number generator */ 2528 m->random_counter = 1; 2529 m->store_at = SCTP_SIGNATURE_SIZE; 2530 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2531 sctp_fill_random_store(m); 2532 2533 /* Minimum cookie size */ 2534 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2535 sizeof(struct sctp_state_cookie); 2536 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2537 2538 /* Setup the initial secret */ 2539 (void)SCTP_GETTIME_TIMEVAL(&time); 2540 m->time_of_secret_change = time.tv_sec; 2541 2542 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2543 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2544 } 2545 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2546 2547 /* How long is a cookie good for ? */ 2548 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2549 /* 2550 * Initialize authentication parameters 2551 */ 2552 m->local_hmacs = sctp_default_supported_hmaclist(); 2553 m->local_auth_chunks = sctp_alloc_chunklist(); 2554 m->default_dscp = 0; 2555 #ifdef INET6 2556 m->default_flowlabel = 0; 2557 #endif 2558 m->port = 0; /* encapsulation disabled by default */ 2559 sctp_auth_set_default_chunks(m->local_auth_chunks); 2560 LIST_INIT(&m->shared_keys); 2561 /* add default NULL key as key id 0 */ 2562 null_key = sctp_alloc_sharedkey(); 2563 sctp_insert_sharedkey(&m->shared_keys, null_key); 2564 SCTP_INP_WUNLOCK(inp); 2565 #ifdef SCTP_LOG_CLOSING 2566 sctp_log_closing(inp, NULL, 12); 2567 #endif 2568 return (error); 2569 } 2570 2571 2572 void 2573 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2574 struct sctp_tcb *stcb) 2575 { 2576 struct sctp_nets *net; 2577 uint16_t lport, rport; 2578 struct sctppcbhead *head; 2579 struct sctp_laddr *laddr, *oladdr; 2580 2581 atomic_add_int(&stcb->asoc.refcnt, 1); 2582 SCTP_TCB_UNLOCK(stcb); 2583 SCTP_INP_INFO_WLOCK(); 2584 SCTP_INP_WLOCK(old_inp); 2585 SCTP_INP_WLOCK(new_inp); 2586 SCTP_TCB_LOCK(stcb); 2587 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2588 2589 new_inp->sctp_ep.time_of_secret_change = 2590 old_inp->sctp_ep.time_of_secret_change; 2591 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2592 sizeof(old_inp->sctp_ep.secret_key)); 2593 new_inp->sctp_ep.current_secret_number = 2594 old_inp->sctp_ep.current_secret_number; 2595 new_inp->sctp_ep.last_secret_number = 2596 old_inp->sctp_ep.last_secret_number; 2597 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2598 2599 /* make it so new data pours into the new socket */ 2600 stcb->sctp_socket = new_inp->sctp_socket; 2601 stcb->sctp_ep = new_inp; 2602 2603 /* Copy the port across */ 2604 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2605 rport = stcb->rport; 2606 /* Pull the tcb from the old association */ 2607 LIST_REMOVE(stcb, sctp_tcbhash); 2608 LIST_REMOVE(stcb, sctp_tcblist); 2609 if (stcb->asoc.in_asocid_hash) { 2610 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2611 } 2612 /* Now insert the new_inp into the TCP connected hash */ 2613 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2614 2615 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2616 /* Its safe to access */ 2617 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2618 2619 /* Now move the tcb into the endpoint list */ 2620 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2621 /* 2622 * Question, do we even need to worry about the ep-hash since we 2623 * only have one connection? Probably not :> so lets get rid of it 2624 * and not suck up any kernel memory in that. 2625 */ 2626 if (stcb->asoc.in_asocid_hash) { 2627 struct sctpasochead *lhd; 2628 2629 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2630 new_inp->hashasocidmark)]; 2631 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2632 } 2633 /* Ok. Let's restart timer. */ 2634 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2635 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2636 stcb, net); 2637 } 2638 2639 SCTP_INP_INFO_WUNLOCK(); 2640 if (new_inp->sctp_tcbhash != NULL) { 2641 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2642 new_inp->sctp_tcbhash = NULL; 2643 } 2644 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2645 /* Subset bound, so copy in the laddr list from the old_inp */ 2646 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2647 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2648 if (laddr == NULL) { 2649 /* 2650 * Gak, what can we do? This assoc is really 2651 * HOSED. We probably should send an abort 2652 * here. 2653 */ 2654 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2655 continue; 2656 } 2657 SCTP_INCR_LADDR_COUNT(); 2658 bzero(laddr, sizeof(*laddr)); 2659 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2660 laddr->ifa = oladdr->ifa; 2661 atomic_add_int(&laddr->ifa->refcount, 1); 2662 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2663 sctp_nxt_addr); 2664 new_inp->laddr_count++; 2665 if (oladdr == stcb->asoc.last_used_address) { 2666 stcb->asoc.last_used_address = laddr; 2667 } 2668 } 2669 } 2670 /* 2671 * Now any running timers need to be adjusted since we really don't 2672 * care if they are running or not just blast in the new_inp into 2673 * all of them. 2674 */ 2675 2676 stcb->asoc.dack_timer.ep = (void *)new_inp; 2677 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2678 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2679 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2680 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2681 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2682 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2683 /* now what about the nets? */ 2684 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2685 net->pmtu_timer.ep = (void *)new_inp; 2686 net->hb_timer.ep = (void *)new_inp; 2687 net->rxt_timer.ep = (void *)new_inp; 2688 } 2689 SCTP_INP_WUNLOCK(new_inp); 2690 SCTP_INP_WUNLOCK(old_inp); 2691 } 2692 2693 2694 2695 2696 /* sctp_ifap is used to bypass normal local address validation checks */ 2697 int 2698 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2699 struct sctp_ifa *sctp_ifap, struct thread *p) 2700 { 2701 /* bind a ep to a socket address */ 2702 struct sctppcbhead *head; 2703 struct sctp_inpcb *inp, *inp_tmp; 2704 struct inpcb *ip_inp; 2705 int port_reuse_active = 0; 2706 int bindall; 2707 uint16_t lport; 2708 int error; 2709 uint32_t vrf_id; 2710 2711 lport = 0; 2712 error = 0; 2713 bindall = 1; 2714 inp = (struct sctp_inpcb *)so->so_pcb; 2715 ip_inp = (struct inpcb *)so->so_pcb; 2716 #ifdef SCTP_DEBUG 2717 if (addr) { 2718 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2719 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2720 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2721 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2722 } 2723 #endif 2724 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2725 /* already did a bind, subsequent binds NOT allowed ! */ 2726 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2727 return (EINVAL); 2728 } 2729 #ifdef INVARIANTS 2730 if (p == NULL) 2731 panic("null proc/thread"); 2732 #endif 2733 if (addr != NULL) { 2734 switch (addr->sa_family) { 2735 #ifdef INET 2736 case AF_INET: 2737 { 2738 struct sockaddr_in *sin; 2739 2740 /* IPV6_V6ONLY socket? */ 2741 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2742 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2743 return (EINVAL); 2744 } 2745 if (addr->sa_len != sizeof(*sin)) { 2746 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2747 return (EINVAL); 2748 } 2749 sin = (struct sockaddr_in *)addr; 2750 lport = sin->sin_port; 2751 /* 2752 * For LOOPBACK the prison_local_ip4() call 2753 * will transmute the ip address to the 2754 * proper value. 2755 */ 2756 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2757 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2758 return (error); 2759 } 2760 if (sin->sin_addr.s_addr != INADDR_ANY) { 2761 bindall = 0; 2762 } 2763 break; 2764 } 2765 #endif 2766 #ifdef INET6 2767 case AF_INET6: 2768 { 2769 /* 2770 * Only for pure IPv6 Address. (No IPv4 2771 * Mapped!) 2772 */ 2773 struct sockaddr_in6 *sin6; 2774 2775 sin6 = (struct sockaddr_in6 *)addr; 2776 2777 if (addr->sa_len != sizeof(*sin6)) { 2778 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2779 return (EINVAL); 2780 } 2781 lport = sin6->sin6_port; 2782 /* 2783 * For LOOPBACK the prison_local_ip6() call 2784 * will transmute the ipv6 address to the 2785 * proper value. 2786 */ 2787 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2788 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2789 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2790 return (error); 2791 } 2792 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2793 bindall = 0; 2794 /* KAME hack: embed scopeid */ 2795 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2796 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2797 return (EINVAL); 2798 } 2799 } 2800 /* this must be cleared for ifa_ifwithaddr() */ 2801 sin6->sin6_scope_id = 0; 2802 break; 2803 } 2804 #endif 2805 default: 2806 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2807 return (EAFNOSUPPORT); 2808 } 2809 } 2810 SCTP_INP_INFO_WLOCK(); 2811 SCTP_INP_WLOCK(inp); 2812 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2813 vrf_id = inp->def_vrf_id; 2814 2815 /* increase our count due to the unlock we do */ 2816 SCTP_INP_INCR_REF(inp); 2817 if (lport) { 2818 /* 2819 * Did the caller specify a port? if so we must see if an ep 2820 * already has this one bound. 2821 */ 2822 /* got to be root to get at low ports */ 2823 if (ntohs(lport) < IPPORT_RESERVED) { 2824 if (p && (error = 2825 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2826 )) { 2827 SCTP_INP_DECR_REF(inp); 2828 SCTP_INP_WUNLOCK(inp); 2829 SCTP_INP_INFO_WUNLOCK(); 2830 return (error); 2831 } 2832 } 2833 if (p == NULL) { 2834 SCTP_INP_DECR_REF(inp); 2835 SCTP_INP_WUNLOCK(inp); 2836 SCTP_INP_INFO_WUNLOCK(); 2837 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2838 return (error); 2839 } 2840 SCTP_INP_WUNLOCK(inp); 2841 if (bindall) { 2842 vrf_id = inp->def_vrf_id; 2843 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2844 if (inp_tmp != NULL) { 2845 /* 2846 * lock guy returned and lower count note 2847 * that we are not bound so inp_tmp should 2848 * NEVER be inp. And it is this inp 2849 * (inp_tmp) that gets the reference bump, 2850 * so we must lower it. 2851 */ 2852 SCTP_INP_DECR_REF(inp_tmp); 2853 /* unlock info */ 2854 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2855 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2856 /* 2857 * Ok, must be one-2-one and 2858 * allowing port re-use 2859 */ 2860 port_reuse_active = 1; 2861 goto continue_anyway; 2862 } 2863 SCTP_INP_DECR_REF(inp); 2864 SCTP_INP_INFO_WUNLOCK(); 2865 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2866 return (EADDRINUSE); 2867 } 2868 } else { 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 } 2895 continue_anyway: 2896 SCTP_INP_WLOCK(inp); 2897 if (bindall) { 2898 /* verify that no lport is not used by a singleton */ 2899 if ((port_reuse_active == 0) && 2900 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2901 /* Sorry someone already has this one bound */ 2902 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2903 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2904 port_reuse_active = 1; 2905 } else { 2906 SCTP_INP_DECR_REF(inp); 2907 SCTP_INP_WUNLOCK(inp); 2908 SCTP_INP_INFO_WUNLOCK(); 2909 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2910 return (EADDRINUSE); 2911 } 2912 } 2913 } 2914 } else { 2915 uint16_t first, last, candidate; 2916 uint16_t count; 2917 int done; 2918 2919 if (ip_inp->inp_flags & INP_HIGHPORT) { 2920 first = MODULE_GLOBAL(ipport_hifirstauto); 2921 last = MODULE_GLOBAL(ipport_hilastauto); 2922 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2923 if (p && (error = 2924 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2925 )) { 2926 SCTP_INP_DECR_REF(inp); 2927 SCTP_INP_WUNLOCK(inp); 2928 SCTP_INP_INFO_WUNLOCK(); 2929 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2930 return (error); 2931 } 2932 first = MODULE_GLOBAL(ipport_lowfirstauto); 2933 last = MODULE_GLOBAL(ipport_lowlastauto); 2934 } else { 2935 first = MODULE_GLOBAL(ipport_firstauto); 2936 last = MODULE_GLOBAL(ipport_lastauto); 2937 } 2938 if (first > last) { 2939 uint16_t temp; 2940 2941 temp = first; 2942 first = last; 2943 last = temp; 2944 } 2945 count = last - first + 1; /* number of candidates */ 2946 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2947 2948 done = 0; 2949 while (!done) { 2950 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2951 done = 1; 2952 } 2953 if (!done) { 2954 if (--count == 0) { 2955 SCTP_INP_DECR_REF(inp); 2956 SCTP_INP_WUNLOCK(inp); 2957 SCTP_INP_INFO_WUNLOCK(); 2958 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2959 return (EADDRINUSE); 2960 } 2961 if (candidate == last) 2962 candidate = first; 2963 else 2964 candidate = candidate + 1; 2965 } 2966 } 2967 lport = htons(candidate); 2968 } 2969 SCTP_INP_DECR_REF(inp); 2970 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2971 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2972 /* 2973 * this really should not happen. The guy did a non-blocking 2974 * bind and then did a close at the same time. 2975 */ 2976 SCTP_INP_WUNLOCK(inp); 2977 SCTP_INP_INFO_WUNLOCK(); 2978 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2979 return (EINVAL); 2980 } 2981 /* ok we look clear to give out this port, so lets setup the binding */ 2982 if (bindall) { 2983 /* binding to all addresses, so just set in the proper flags */ 2984 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2985 /* set the automatic addr changes from kernel flag */ 2986 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2987 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2988 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2989 } else { 2990 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2991 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2992 } 2993 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2994 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2995 } else { 2996 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2997 } 2998 /* 2999 * set the automatic mobility_base from kernel flag (by 3000 * micchie) 3001 */ 3002 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3003 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3004 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3005 } else { 3006 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3007 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3008 } 3009 /* 3010 * set the automatic mobility_fasthandoff from kernel flag 3011 * (by micchie) 3012 */ 3013 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3014 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3015 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3016 } else { 3017 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3018 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3019 } 3020 } else { 3021 /* 3022 * bind specific, make sure flags is off and add a new 3023 * address structure to the sctp_addr_list inside the ep 3024 * structure. 3025 * 3026 * We will need to allocate one and insert it at the head. The 3027 * socketopt call can just insert new addresses in there as 3028 * well. It will also have to do the embed scope kame hack 3029 * too (before adding). 3030 */ 3031 struct sctp_ifa *ifa; 3032 struct sockaddr_storage store_sa; 3033 3034 memset(&store_sa, 0, sizeof(store_sa)); 3035 switch (addr->sa_family) { 3036 #ifdef INET 3037 case AF_INET: 3038 { 3039 struct sockaddr_in *sin; 3040 3041 sin = (struct sockaddr_in *)&store_sa; 3042 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3043 sin->sin_port = 0; 3044 break; 3045 } 3046 #endif 3047 #ifdef INET6 3048 case AF_INET6: 3049 { 3050 struct sockaddr_in6 *sin6; 3051 3052 sin6 = (struct sockaddr_in6 *)&store_sa; 3053 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3054 sin6->sin6_port = 0; 3055 break; 3056 } 3057 #endif 3058 default: 3059 break; 3060 } 3061 /* 3062 * first find the interface with the bound address need to 3063 * zero out the port to find the address! yuck! can't do 3064 * this earlier since need port for sctp_pcb_findep() 3065 */ 3066 if (sctp_ifap != NULL) { 3067 ifa = sctp_ifap; 3068 } else { 3069 /* 3070 * Note for BSD we hit here always other O/S's will 3071 * pass things in via the sctp_ifap argument 3072 * (Panda). 3073 */ 3074 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3075 vrf_id, SCTP_ADDR_NOT_LOCKED); 3076 } 3077 if (ifa == NULL) { 3078 /* Can't find an interface with that address */ 3079 SCTP_INP_WUNLOCK(inp); 3080 SCTP_INP_INFO_WUNLOCK(); 3081 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3082 return (EADDRNOTAVAIL); 3083 } 3084 #ifdef INET6 3085 if (addr->sa_family == AF_INET6) { 3086 /* GAK, more FIXME IFA lock? */ 3087 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3088 /* Can't bind a non-existent addr. */ 3089 SCTP_INP_WUNLOCK(inp); 3090 SCTP_INP_INFO_WUNLOCK(); 3091 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3092 return (EINVAL); 3093 } 3094 } 3095 #endif 3096 /* we're not bound all */ 3097 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3098 /* allow bindx() to send ASCONF's for binding changes */ 3099 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3100 /* clear automatic addr changes from kernel flag */ 3101 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3102 3103 /* add this address to the endpoint list */ 3104 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3105 if (error != 0) { 3106 SCTP_INP_WUNLOCK(inp); 3107 SCTP_INP_INFO_WUNLOCK(); 3108 return (error); 3109 } 3110 inp->laddr_count++; 3111 } 3112 /* find the bucket */ 3113 if (port_reuse_active) { 3114 /* Put it into tcp 1-2-1 hash */ 3115 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3116 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3117 } else { 3118 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3119 } 3120 /* put it in the bucket */ 3121 LIST_INSERT_HEAD(head, inp, sctp_hash); 3122 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3123 (void *)head, ntohs(lport), port_reuse_active); 3124 /* set in the port */ 3125 inp->sctp_lport = lport; 3126 3127 /* turn off just the unbound flag */ 3128 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3129 SCTP_INP_WUNLOCK(inp); 3130 SCTP_INP_INFO_WUNLOCK(); 3131 return (0); 3132 } 3133 3134 3135 static void 3136 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3137 { 3138 struct sctp_iterator *it, *nit; 3139 3140 /* 3141 * We enter with the only the ITERATOR_LOCK in place and a write 3142 * lock on the inp_info stuff. 3143 */ 3144 it = sctp_it_ctl.cur_it; 3145 if (it && (it->vn != curvnet)) { 3146 /* Its not looking at our VNET */ 3147 return; 3148 } 3149 if (it && (it->inp == inp)) { 3150 /* 3151 * This is tricky and we hold the iterator lock, but when it 3152 * returns and gets the lock (when we release it) the 3153 * iterator will try to operate on inp. We need to stop that 3154 * from happening. But of course the iterator has a 3155 * reference on the stcb and inp. We can mark it and it will 3156 * stop. 3157 * 3158 * If its a single iterator situation, we set the end iterator 3159 * flag. Otherwise we set the iterator to go to the next 3160 * inp. 3161 * 3162 */ 3163 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3164 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3165 } else { 3166 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3167 } 3168 } 3169 /* 3170 * Now go through and remove any single reference to our inp that 3171 * may be still pending on the list 3172 */ 3173 SCTP_IPI_ITERATOR_WQ_LOCK(); 3174 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3175 if (it->vn != curvnet) { 3176 continue; 3177 } 3178 if (it->inp == inp) { 3179 /* This one points to me is it inp specific? */ 3180 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3181 /* Remove and free this one */ 3182 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3183 it, sctp_nxt_itr); 3184 if (it->function_atend != NULL) { 3185 (*it->function_atend) (it->pointer, it->val); 3186 } 3187 SCTP_FREE(it, SCTP_M_ITER); 3188 } else { 3189 it->inp = LIST_NEXT(it->inp, sctp_list); 3190 if (it->inp) { 3191 SCTP_INP_INCR_REF(it->inp); 3192 } 3193 } 3194 /* 3195 * When its put in the refcnt is incremented so decr 3196 * it 3197 */ 3198 SCTP_INP_DECR_REF(inp); 3199 } 3200 } 3201 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3202 } 3203 3204 /* release sctp_inpcb unbind the port */ 3205 void 3206 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3207 { 3208 /* 3209 * Here we free a endpoint. We must find it (if it is in the Hash 3210 * table) and remove it from there. Then we must also find it in the 3211 * overall list and remove it from there. After all removals are 3212 * complete then any timer has to be stopped. Then start the actual 3213 * freeing. a) Any local lists. b) Any associations. c) The hash of 3214 * all associations. d) finally the ep itself. 3215 */ 3216 struct sctp_tcb *asoc, *nasoc; 3217 struct sctp_laddr *laddr, *nladdr; 3218 struct inpcb *ip_pcb; 3219 struct socket *so; 3220 int being_refed = 0; 3221 struct sctp_queued_to_read *sq, *nsq; 3222 int cnt; 3223 sctp_sharedkey_t *shared_key, *nshared_key; 3224 3225 3226 #ifdef SCTP_LOG_CLOSING 3227 sctp_log_closing(inp, NULL, 0); 3228 #endif 3229 SCTP_ITERATOR_LOCK(); 3230 /* mark any iterators on the list or being processed */ 3231 sctp_iterator_inp_being_freed(inp); 3232 SCTP_ITERATOR_UNLOCK(); 3233 so = inp->sctp_socket; 3234 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3235 /* been here before.. eeks.. get out of here */ 3236 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3237 #ifdef SCTP_LOG_CLOSING 3238 sctp_log_closing(inp, NULL, 1); 3239 #endif 3240 return; 3241 } 3242 SCTP_ASOC_CREATE_LOCK(inp); 3243 SCTP_INP_INFO_WLOCK(); 3244 3245 SCTP_INP_WLOCK(inp); 3246 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3247 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3248 /* socket is gone, so no more wakeups allowed */ 3249 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3250 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3251 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3252 3253 } 3254 /* First time through we have the socket lock, after that no more. */ 3255 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3256 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3257 3258 if (inp->control) { 3259 sctp_m_freem(inp->control); 3260 inp->control = NULL; 3261 } 3262 if (inp->pkt) { 3263 sctp_m_freem(inp->pkt); 3264 inp->pkt = NULL; 3265 } 3266 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3267 * here but I will be nice :> (i.e. 3268 * ip_pcb = ep;) */ 3269 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3270 int cnt_in_sd; 3271 3272 cnt_in_sd = 0; 3273 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3274 SCTP_TCB_LOCK(asoc); 3275 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3276 /* Skip guys being freed */ 3277 cnt_in_sd++; 3278 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3279 /* 3280 * Special case - we did not start a 3281 * kill timer on the asoc due to it 3282 * was not closed. So go ahead and 3283 * start it now. 3284 */ 3285 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3286 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3287 } 3288 SCTP_TCB_UNLOCK(asoc); 3289 continue; 3290 } 3291 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3292 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3293 (asoc->asoc.total_output_queue_size == 0)) { 3294 /* 3295 * If we have data in queue, we don't want 3296 * to just free since the app may have done, 3297 * send()/close or connect/send/close. And 3298 * it wants the data to get across first. 3299 */ 3300 /* Just abandon things in the front states */ 3301 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3302 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3303 cnt_in_sd++; 3304 } 3305 continue; 3306 } 3307 /* Disconnect the socket please */ 3308 asoc->sctp_socket = NULL; 3309 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3310 if ((asoc->asoc.size_on_reasm_queue > 0) || 3311 (asoc->asoc.control_pdapi) || 3312 (asoc->asoc.size_on_all_streams > 0) || 3313 (so && (so->so_rcv.sb_cc > 0))) { 3314 /* Left with Data unread */ 3315 struct mbuf *op_err; 3316 3317 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3318 0, M_NOWAIT, 1, MT_DATA); 3319 if (op_err) { 3320 /* Fill in the user initiated abort */ 3321 struct sctp_paramhdr *ph; 3322 3323 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 3324 ph = mtod(op_err, struct sctp_paramhdr *); 3325 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 3326 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3327 } 3328 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3329 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3330 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3331 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3332 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3333 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3334 } 3335 if (sctp_free_assoc(inp, asoc, 3336 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3337 cnt_in_sd++; 3338 } 3339 continue; 3340 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3341 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3342 (asoc->asoc.stream_queue_cnt == 0)) { 3343 if (asoc->asoc.locked_on_sending) { 3344 goto abort_anyway; 3345 } 3346 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3347 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3348 struct sctp_nets *netp; 3349 3350 /* 3351 * there is nothing queued to send, 3352 * so I send shutdown 3353 */ 3354 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3355 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3356 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3357 } 3358 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3359 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3360 sctp_stop_timers_for_shutdown(asoc); 3361 if (asoc->asoc.alternate) { 3362 netp = asoc->asoc.alternate; 3363 } else { 3364 netp = asoc->asoc.primary_destination; 3365 } 3366 sctp_send_shutdown(asoc, netp); 3367 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3368 netp); 3369 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3370 asoc->asoc.primary_destination); 3371 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3372 } 3373 } else { 3374 /* mark into shutdown pending */ 3375 struct sctp_stream_queue_pending *sp; 3376 3377 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3378 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3379 asoc->asoc.primary_destination); 3380 if (asoc->asoc.locked_on_sending) { 3381 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3382 sctp_streamhead); 3383 if (sp == NULL) { 3384 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3385 (void *)asoc->asoc.locked_on_sending, 3386 asoc->asoc.locked_on_sending->stream_no); 3387 } else { 3388 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3389 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3390 } 3391 } 3392 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3393 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3394 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3395 struct mbuf *op_err; 3396 3397 abort_anyway: 3398 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3399 0, M_NOWAIT, 1, MT_DATA); 3400 if (op_err) { 3401 /* 3402 * Fill in the user 3403 * initiated abort 3404 */ 3405 struct sctp_paramhdr *ph; 3406 3407 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 3408 ph = mtod(op_err, struct sctp_paramhdr *); 3409 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 3410 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3411 } 3412 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3413 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3414 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3415 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3416 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3417 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3418 } 3419 if (sctp_free_assoc(inp, asoc, 3420 SCTP_PCBFREE_NOFORCE, 3421 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3422 cnt_in_sd++; 3423 } 3424 continue; 3425 } else { 3426 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3427 } 3428 } 3429 cnt_in_sd++; 3430 SCTP_TCB_UNLOCK(asoc); 3431 } 3432 /* now is there some left in our SHUTDOWN state? */ 3433 if (cnt_in_sd) { 3434 #ifdef SCTP_LOG_CLOSING 3435 sctp_log_closing(inp, NULL, 2); 3436 #endif 3437 inp->sctp_socket = NULL; 3438 SCTP_INP_WUNLOCK(inp); 3439 SCTP_ASOC_CREATE_UNLOCK(inp); 3440 SCTP_INP_INFO_WUNLOCK(); 3441 return; 3442 } 3443 } 3444 inp->sctp_socket = NULL; 3445 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3446 SCTP_PCB_FLAGS_UNBOUND) { 3447 /* 3448 * ok, this guy has been bound. It's port is somewhere in 3449 * the SCTP_BASE_INFO(hash table). Remove it! 3450 */ 3451 LIST_REMOVE(inp, sctp_hash); 3452 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3453 } 3454 /* 3455 * If there is a timer running to kill us, forget it, since it may 3456 * have a contest on the INP lock.. which would cause us to die ... 3457 */ 3458 cnt = 0; 3459 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3460 SCTP_TCB_LOCK(asoc); 3461 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3462 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3463 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3464 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3465 } 3466 cnt++; 3467 SCTP_TCB_UNLOCK(asoc); 3468 continue; 3469 } 3470 /* Free associations that are NOT killing us */ 3471 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3472 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3473 struct mbuf *op_err; 3474 3475 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3476 0, M_NOWAIT, 1, MT_DATA); 3477 if (op_err) { 3478 /* Fill in the user initiated abort */ 3479 struct sctp_paramhdr *ph; 3480 3481 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 3482 ph = mtod(op_err, struct sctp_paramhdr *); 3483 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 3484 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3485 } 3486 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3487 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3488 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3489 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3490 cnt++; 3491 SCTP_TCB_UNLOCK(asoc); 3492 continue; 3493 } 3494 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3495 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3496 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3497 } 3498 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3499 cnt++; 3500 } 3501 } 3502 if (cnt) { 3503 /* Ok we have someone out there that will kill us */ 3504 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3505 #ifdef SCTP_LOG_CLOSING 3506 sctp_log_closing(inp, NULL, 3); 3507 #endif 3508 SCTP_INP_WUNLOCK(inp); 3509 SCTP_ASOC_CREATE_UNLOCK(inp); 3510 SCTP_INP_INFO_WUNLOCK(); 3511 return; 3512 } 3513 if (SCTP_INP_LOCK_CONTENDED(inp)) 3514 being_refed++; 3515 if (SCTP_INP_READ_CONTENDED(inp)) 3516 being_refed++; 3517 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3518 being_refed++; 3519 3520 if ((inp->refcount) || 3521 (being_refed) || 3522 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3523 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3524 #ifdef SCTP_LOG_CLOSING 3525 sctp_log_closing(inp, NULL, 4); 3526 #endif 3527 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3528 SCTP_INP_WUNLOCK(inp); 3529 SCTP_ASOC_CREATE_UNLOCK(inp); 3530 SCTP_INP_INFO_WUNLOCK(); 3531 return; 3532 } 3533 inp->sctp_ep.signature_change.type = 0; 3534 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3535 /* 3536 * Remove it from the list .. last thing we need a lock for. 3537 */ 3538 LIST_REMOVE(inp, sctp_list); 3539 SCTP_INP_WUNLOCK(inp); 3540 SCTP_ASOC_CREATE_UNLOCK(inp); 3541 SCTP_INP_INFO_WUNLOCK(); 3542 /* 3543 * Now we release all locks. Since this INP cannot be found anymore 3544 * except possibly by the kill timer that might be running. We call 3545 * the drain function here. It should hit the case were it sees the 3546 * ACTIVE flag cleared and exit out freeing us to proceed and 3547 * destroy everything. 3548 */ 3549 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3550 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3551 } else { 3552 /* Probably un-needed */ 3553 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3554 } 3555 3556 #ifdef SCTP_LOG_CLOSING 3557 sctp_log_closing(inp, NULL, 5); 3558 #endif 3559 3560 3561 if ((inp->sctp_asocidhash) != NULL) { 3562 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3563 inp->sctp_asocidhash = NULL; 3564 } 3565 /* sa_ignore FREED_MEMORY */ 3566 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3567 /* Its only abandoned if it had data left */ 3568 if (sq->length) 3569 SCTP_STAT_INCR(sctps_left_abandon); 3570 3571 TAILQ_REMOVE(&inp->read_queue, sq, next); 3572 sctp_free_remote_addr(sq->whoFrom); 3573 if (so) 3574 so->so_rcv.sb_cc -= sq->length; 3575 if (sq->data) { 3576 sctp_m_freem(sq->data); 3577 sq->data = NULL; 3578 } 3579 /* 3580 * no need to free the net count, since at this point all 3581 * assoc's are gone. 3582 */ 3583 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3584 SCTP_DECR_READQ_COUNT(); 3585 } 3586 /* Now the sctp_pcb things */ 3587 /* 3588 * free each asoc if it is not already closed/free. we can't use the 3589 * macro here since le_next will get freed as part of the 3590 * sctp_free_assoc() call. 3591 */ 3592 if (so) { 3593 #ifdef IPSEC 3594 ipsec_delete_pcbpolicy(ip_pcb); 3595 #endif /* IPSEC */ 3596 3597 /* Unlocks not needed since the socket is gone now */ 3598 } 3599 if (ip_pcb->inp_options) { 3600 (void)sctp_m_free(ip_pcb->inp_options); 3601 ip_pcb->inp_options = 0; 3602 } 3603 #ifdef INET6 3604 if (ip_pcb->inp_vflag & INP_IPV6) { 3605 struct in6pcb *in6p; 3606 3607 in6p = (struct in6pcb *)inp; 3608 ip6_freepcbopts(in6p->in6p_outputopts); 3609 } 3610 #endif /* INET6 */ 3611 ip_pcb->inp_vflag = 0; 3612 /* free up authentication fields */ 3613 if (inp->sctp_ep.local_auth_chunks != NULL) 3614 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3615 if (inp->sctp_ep.local_hmacs != NULL) 3616 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3617 3618 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3619 LIST_REMOVE(shared_key, next); 3620 sctp_free_sharedkey(shared_key); 3621 /* sa_ignore FREED_MEMORY */ 3622 } 3623 3624 /* 3625 * if we have an address list the following will free the list of 3626 * ifaddr's that are set into this ep. Again macro limitations here, 3627 * since the LIST_FOREACH could be a bad idea. 3628 */ 3629 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3630 sctp_remove_laddr(laddr); 3631 } 3632 3633 #ifdef SCTP_TRACK_FREED_ASOCS 3634 /* TEMP CODE */ 3635 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3636 LIST_REMOVE(asoc, sctp_tcblist); 3637 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3638 SCTP_DECR_ASOC_COUNT(); 3639 } 3640 /* *** END TEMP CODE *** */ 3641 #endif 3642 /* Now lets see about freeing the EP hash table. */ 3643 if (inp->sctp_tcbhash != NULL) { 3644 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3645 inp->sctp_tcbhash = NULL; 3646 } 3647 /* Now we must put the ep memory back into the zone pool */ 3648 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3649 SCTP_INP_LOCK_DESTROY(inp); 3650 SCTP_INP_READ_DESTROY(inp); 3651 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3652 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3653 SCTP_DECR_EP_COUNT(); 3654 } 3655 3656 3657 struct sctp_nets * 3658 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3659 { 3660 struct sctp_nets *net; 3661 3662 /* locate the address */ 3663 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3664 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3665 return (net); 3666 } 3667 return (NULL); 3668 } 3669 3670 3671 int 3672 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3673 { 3674 struct sctp_ifa *sctp_ifa; 3675 3676 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3677 if (sctp_ifa) { 3678 return (1); 3679 } else { 3680 return (0); 3681 } 3682 } 3683 3684 /* 3685 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3686 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3687 * stats of stuff. 3688 */ 3689 int 3690 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3691 struct sctp_nets **netp, int set_scope, int from) 3692 { 3693 /* 3694 * The following is redundant to the same lines in the 3695 * sctp_aloc_assoc() but is needed since others call the add address 3696 * function 3697 */ 3698 struct sctp_nets *net, *netfirst; 3699 int addr_inscope; 3700 3701 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3702 from); 3703 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3704 3705 netfirst = sctp_findnet(stcb, newaddr); 3706 if (netfirst) { 3707 /* 3708 * Lie and return ok, we don't want to make the association 3709 * go away for this behavior. It will happen in the TCP 3710 * model in a connected socket. It does not reach the hash 3711 * table until after the association is built so it can't be 3712 * found. Mark as reachable, since the initial creation will 3713 * have been cleared and the NOT_IN_ASSOC flag will have 3714 * been added... and we don't want to end up removing it 3715 * back out. 3716 */ 3717 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3718 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3719 SCTP_ADDR_UNCONFIRMED); 3720 } else { 3721 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3722 } 3723 3724 return (0); 3725 } 3726 addr_inscope = 1; 3727 switch (newaddr->sa_family) { 3728 #ifdef INET 3729 case AF_INET: 3730 { 3731 struct sockaddr_in *sin; 3732 3733 sin = (struct sockaddr_in *)newaddr; 3734 if (sin->sin_addr.s_addr == 0) { 3735 /* Invalid address */ 3736 return (-1); 3737 } 3738 /* zero out the bzero area */ 3739 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3740 3741 /* assure len is set */ 3742 sin->sin_len = sizeof(struct sockaddr_in); 3743 if (set_scope) { 3744 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3745 stcb->ipv4_local_scope = 1; 3746 #else 3747 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3748 stcb->asoc.scope.ipv4_local_scope = 1; 3749 } 3750 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3751 } else { 3752 /* Validate the address is in scope */ 3753 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3754 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3755 addr_inscope = 0; 3756 } 3757 } 3758 break; 3759 } 3760 #endif 3761 #ifdef INET6 3762 case AF_INET6: 3763 { 3764 struct sockaddr_in6 *sin6; 3765 3766 sin6 = (struct sockaddr_in6 *)newaddr; 3767 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3768 /* Invalid address */ 3769 return (-1); 3770 } 3771 /* assure len is set */ 3772 sin6->sin6_len = sizeof(struct sockaddr_in6); 3773 if (set_scope) { 3774 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3775 stcb->asoc.scope.loopback_scope = 1; 3776 stcb->asoc.scope.local_scope = 0; 3777 stcb->asoc.scope.ipv4_local_scope = 1; 3778 stcb->asoc.scope.site_scope = 1; 3779 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3780 /* 3781 * If the new destination is a 3782 * LINK_LOCAL we must have common 3783 * site scope. Don't set the local 3784 * scope since we may not share all 3785 * links, only loopback can do this. 3786 * Links on the local network would 3787 * also be on our private network 3788 * for v4 too. 3789 */ 3790 stcb->asoc.scope.ipv4_local_scope = 1; 3791 stcb->asoc.scope.site_scope = 1; 3792 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3793 /* 3794 * If the new destination is 3795 * SITE_LOCAL then we must have site 3796 * scope in common. 3797 */ 3798 stcb->asoc.scope.site_scope = 1; 3799 } 3800 } else { 3801 /* Validate the address is in scope */ 3802 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3803 (stcb->asoc.scope.loopback_scope == 0)) { 3804 addr_inscope = 0; 3805 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3806 (stcb->asoc.scope.local_scope == 0)) { 3807 addr_inscope = 0; 3808 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3809 (stcb->asoc.scope.site_scope == 0)) { 3810 addr_inscope = 0; 3811 } 3812 } 3813 break; 3814 } 3815 #endif 3816 default: 3817 /* not supported family type */ 3818 return (-1); 3819 } 3820 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3821 if (net == NULL) { 3822 return (-1); 3823 } 3824 SCTP_INCR_RADDR_COUNT(); 3825 bzero(net, sizeof(struct sctp_nets)); 3826 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3827 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3828 switch (newaddr->sa_family) { 3829 #ifdef INET 3830 case AF_INET: 3831 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3832 break; 3833 #endif 3834 #ifdef INET6 3835 case AF_INET6: 3836 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3837 break; 3838 #endif 3839 default: 3840 break; 3841 } 3842 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3843 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3844 stcb->asoc.scope.loopback_scope = 1; 3845 stcb->asoc.scope.ipv4_local_scope = 1; 3846 stcb->asoc.scope.local_scope = 0; 3847 stcb->asoc.scope.site_scope = 1; 3848 addr_inscope = 1; 3849 } 3850 net->failure_threshold = stcb->asoc.def_net_failure; 3851 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3852 if (addr_inscope == 0) { 3853 net->dest_state = (SCTP_ADDR_REACHABLE | 3854 SCTP_ADDR_OUT_OF_SCOPE); 3855 } else { 3856 if (from == SCTP_ADDR_IS_CONFIRMED) 3857 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3858 net->dest_state = SCTP_ADDR_REACHABLE; 3859 else 3860 net->dest_state = SCTP_ADDR_REACHABLE | 3861 SCTP_ADDR_UNCONFIRMED; 3862 } 3863 /* 3864 * We set this to 0, the timer code knows that this means its an 3865 * initial value 3866 */ 3867 net->rto_needed = 1; 3868 net->RTO = 0; 3869 net->RTO_measured = 0; 3870 stcb->asoc.numnets++; 3871 net->ref_count = 1; 3872 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3873 net->port = stcb->asoc.port; 3874 net->dscp = stcb->asoc.default_dscp; 3875 #ifdef INET6 3876 net->flowlabel = stcb->asoc.default_flowlabel; 3877 #endif 3878 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3879 net->dest_state |= SCTP_ADDR_NOHB; 3880 } else { 3881 net->dest_state &= ~SCTP_ADDR_NOHB; 3882 } 3883 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3884 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3885 } else { 3886 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3887 } 3888 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3889 /* Init the timer structure */ 3890 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3891 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3892 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3893 3894 /* Now generate a route for this guy */ 3895 #ifdef INET6 3896 /* KAME hack: embed scopeid */ 3897 if (newaddr->sa_family == AF_INET6) { 3898 struct sockaddr_in6 *sin6; 3899 3900 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3901 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3902 sin6->sin6_scope_id = 0; 3903 } 3904 #endif 3905 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3906 3907 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3908 /* Get source address */ 3909 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3910 stcb, 3911 (sctp_route_t *) & net->ro, 3912 net, 3913 0, 3914 stcb->asoc.vrf_id); 3915 /* Now get the interface MTU */ 3916 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3917 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3918 } 3919 if (net->mtu > 0) { 3920 uint32_t rmtu; 3921 3922 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3923 if (rmtu == 0) { 3924 /* 3925 * Start things off to match mtu of 3926 * interface please. 3927 */ 3928 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3929 net->ro.ro_rt, net->mtu); 3930 } else { 3931 /* 3932 * we take the route mtu over the interface, 3933 * since the route may be leading out the 3934 * loopback, or a different interface. 3935 */ 3936 net->mtu = rmtu; 3937 } 3938 } 3939 } 3940 if (net->mtu == 0) { 3941 switch (newaddr->sa_family) { 3942 #ifdef INET 3943 case AF_INET: 3944 net->mtu = SCTP_DEFAULT_MTU; 3945 break; 3946 #endif 3947 #ifdef INET6 3948 case AF_INET6: 3949 net->mtu = 1280; 3950 break; 3951 #endif 3952 default: 3953 break; 3954 } 3955 } 3956 if (net->port) { 3957 net->mtu -= (uint32_t) sizeof(struct udphdr); 3958 } 3959 if (from == SCTP_ALLOC_ASOC) { 3960 stcb->asoc.smallest_mtu = net->mtu; 3961 } 3962 if (stcb->asoc.smallest_mtu > net->mtu) { 3963 stcb->asoc.smallest_mtu = net->mtu; 3964 } 3965 #ifdef INET6 3966 if (newaddr->sa_family == AF_INET6) { 3967 struct sockaddr_in6 *sin6; 3968 3969 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3970 (void)sa6_recoverscope(sin6); 3971 } 3972 #endif 3973 3974 /* JRS - Use the congestion control given in the CC module */ 3975 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 3976 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 3977 3978 /* 3979 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3980 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3981 */ 3982 net->find_pseudo_cumack = 1; 3983 net->find_rtx_pseudo_cumack = 1; 3984 net->src_addr_selected = 0; 3985 /* Choose an initial flowid. */ 3986 net->flowid = stcb->asoc.my_vtag ^ 3987 ntohs(stcb->rport) ^ 3988 ntohs(stcb->sctp_ep->sctp_lport); 3989 #ifdef INVARIANTS 3990 net->flowidset = 1; 3991 #endif 3992 if (netp) { 3993 *netp = net; 3994 } 3995 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3996 if (net->ro.ro_rt == NULL) { 3997 /* Since we have no route put it at the back */ 3998 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3999 } else if (netfirst == NULL) { 4000 /* We are the first one in the pool. */ 4001 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4002 } else if (netfirst->ro.ro_rt == NULL) { 4003 /* 4004 * First one has NO route. Place this one ahead of the first 4005 * one. 4006 */ 4007 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4008 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4009 /* 4010 * This one has a different interface than the one at the 4011 * top of the list. Place it ahead. 4012 */ 4013 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4014 } else { 4015 /* 4016 * Ok we have the same interface as the first one. Move 4017 * forward until we find either a) one with a NULL route... 4018 * insert ahead of that b) one with a different ifp.. insert 4019 * after that. c) end of the list.. insert at the tail. 4020 */ 4021 struct sctp_nets *netlook; 4022 4023 do { 4024 netlook = TAILQ_NEXT(netfirst, sctp_next); 4025 if (netlook == NULL) { 4026 /* End of the list */ 4027 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4028 break; 4029 } else if (netlook->ro.ro_rt == NULL) { 4030 /* next one has NO route */ 4031 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4032 break; 4033 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4034 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4035 net, sctp_next); 4036 break; 4037 } 4038 /* Shift forward */ 4039 netfirst = netlook; 4040 } while (netlook != NULL); 4041 } 4042 4043 /* got to have a primary set */ 4044 if (stcb->asoc.primary_destination == 0) { 4045 stcb->asoc.primary_destination = net; 4046 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4047 (net->ro.ro_rt) && 4048 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4049 /* No route to current primary adopt new primary */ 4050 stcb->asoc.primary_destination = net; 4051 } 4052 /* Validate primary is first */ 4053 net = TAILQ_FIRST(&stcb->asoc.nets); 4054 if ((net != stcb->asoc.primary_destination) && 4055 (stcb->asoc.primary_destination)) { 4056 /* 4057 * first one on the list is NOT the primary sctp_cmpaddr() 4058 * is much more efficient if the primary is the first on the 4059 * list, make it so. 4060 */ 4061 TAILQ_REMOVE(&stcb->asoc.nets, 4062 stcb->asoc.primary_destination, sctp_next); 4063 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4064 stcb->asoc.primary_destination, sctp_next); 4065 } 4066 return (0); 4067 } 4068 4069 4070 static uint32_t 4071 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4072 { 4073 uint32_t id; 4074 struct sctpasochead *head; 4075 struct sctp_tcb *lstcb; 4076 4077 SCTP_INP_WLOCK(inp); 4078 try_again: 4079 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4080 /* TSNH */ 4081 SCTP_INP_WUNLOCK(inp); 4082 return (0); 4083 } 4084 /* 4085 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4086 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4087 */ 4088 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4089 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4090 } 4091 id = inp->sctp_associd_counter; 4092 inp->sctp_associd_counter++; 4093 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4094 if (lstcb) { 4095 goto try_again; 4096 } 4097 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4098 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4099 stcb->asoc.in_asocid_hash = 1; 4100 SCTP_INP_WUNLOCK(inp); 4101 return id; 4102 } 4103 4104 /* 4105 * allocate an association and add it to the endpoint. The caller must be 4106 * careful to add all additional addresses once they are know right away or 4107 * else the assoc will be may experience a blackout scenario. 4108 */ 4109 struct sctp_tcb * 4110 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4111 int *error, uint32_t override_tag, uint32_t vrf_id, 4112 struct thread *p 4113 ) 4114 { 4115 /* note the p argument is only valid in unbound sockets */ 4116 4117 struct sctp_tcb *stcb; 4118 struct sctp_association *asoc; 4119 struct sctpasochead *head; 4120 uint16_t rport; 4121 int err; 4122 4123 /* 4124 * Assumption made here: Caller has done a 4125 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4126 * address does not exist already. 4127 */ 4128 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4129 /* Hit max assoc, sorry no more */ 4130 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4131 *error = ENOBUFS; 4132 return (NULL); 4133 } 4134 if (firstaddr == NULL) { 4135 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4136 *error = EINVAL; 4137 return (NULL); 4138 } 4139 SCTP_INP_RLOCK(inp); 4140 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4141 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4142 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4143 /* 4144 * If its in the TCP pool, its NOT allowed to create an 4145 * association. The parent listener needs to call 4146 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4147 * off, or connected one does this.. its an error. 4148 */ 4149 SCTP_INP_RUNLOCK(inp); 4150 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4151 *error = EINVAL; 4152 return (NULL); 4153 } 4154 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4155 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4156 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4157 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4158 SCTP_INP_RUNLOCK(inp); 4159 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4160 *error = EINVAL; 4161 return (NULL); 4162 } 4163 } 4164 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4165 #ifdef SCTP_DEBUG 4166 if (firstaddr) { 4167 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4168 switch (firstaddr->sa_family) { 4169 #ifdef INET 4170 case AF_INET: 4171 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4172 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4173 break; 4174 #endif 4175 #ifdef INET6 4176 case AF_INET6: 4177 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4178 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4179 break; 4180 #endif 4181 default: 4182 break; 4183 } 4184 } else { 4185 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4186 } 4187 #endif /* SCTP_DEBUG */ 4188 switch (firstaddr->sa_family) { 4189 #ifdef INET 4190 case AF_INET: 4191 { 4192 struct sockaddr_in *sin; 4193 4194 sin = (struct sockaddr_in *)firstaddr; 4195 if ((ntohs(sin->sin_port) == 0) || 4196 (sin->sin_addr.s_addr == INADDR_ANY) || 4197 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4198 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4199 /* Invalid address */ 4200 SCTP_INP_RUNLOCK(inp); 4201 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4202 *error = EINVAL; 4203 return (NULL); 4204 } 4205 rport = sin->sin_port; 4206 break; 4207 } 4208 #endif 4209 #ifdef INET6 4210 case AF_INET6: 4211 { 4212 struct sockaddr_in6 *sin6; 4213 4214 sin6 = (struct sockaddr_in6 *)firstaddr; 4215 if ((ntohs(sin6->sin6_port) == 0) || 4216 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4217 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4218 /* Invalid address */ 4219 SCTP_INP_RUNLOCK(inp); 4220 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4221 *error = EINVAL; 4222 return (NULL); 4223 } 4224 rport = sin6->sin6_port; 4225 break; 4226 } 4227 #endif 4228 default: 4229 /* not supported family type */ 4230 SCTP_INP_RUNLOCK(inp); 4231 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4232 *error = EINVAL; 4233 return (NULL); 4234 } 4235 SCTP_INP_RUNLOCK(inp); 4236 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4237 /* 4238 * If you have not performed a bind, then we need to do the 4239 * ephemeral bind for you. 4240 */ 4241 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4242 (struct sockaddr *)NULL, 4243 (struct sctp_ifa *)NULL, 4244 p 4245 ))) { 4246 /* bind error, probably perm */ 4247 *error = err; 4248 return (NULL); 4249 } 4250 } 4251 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4252 if (stcb == NULL) { 4253 /* out of memory? */ 4254 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4255 *error = ENOMEM; 4256 return (NULL); 4257 } 4258 SCTP_INCR_ASOC_COUNT(); 4259 4260 bzero(stcb, sizeof(*stcb)); 4261 asoc = &stcb->asoc; 4262 4263 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4264 SCTP_TCB_LOCK_INIT(stcb); 4265 SCTP_TCB_SEND_LOCK_INIT(stcb); 4266 stcb->rport = rport; 4267 /* setup back pointer's */ 4268 stcb->sctp_ep = inp; 4269 stcb->sctp_socket = inp->sctp_socket; 4270 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4271 /* failed */ 4272 SCTP_TCB_LOCK_DESTROY(stcb); 4273 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4274 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4275 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4276 SCTP_DECR_ASOC_COUNT(); 4277 *error = err; 4278 return (NULL); 4279 } 4280 /* and the port */ 4281 SCTP_INP_INFO_WLOCK(); 4282 SCTP_INP_WLOCK(inp); 4283 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4284 /* inpcb freed while alloc going on */ 4285 SCTP_TCB_LOCK_DESTROY(stcb); 4286 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4287 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4288 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4289 SCTP_INP_WUNLOCK(inp); 4290 SCTP_INP_INFO_WUNLOCK(); 4291 SCTP_DECR_ASOC_COUNT(); 4292 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4293 *error = EINVAL; 4294 return (NULL); 4295 } 4296 SCTP_TCB_LOCK(stcb); 4297 4298 /* now that my_vtag is set, add it to the hash */ 4299 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4300 /* put it in the bucket in the vtag hash of assoc's for the system */ 4301 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4302 SCTP_INP_INFO_WUNLOCK(); 4303 4304 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4305 /* failure.. memory error? */ 4306 if (asoc->strmout) { 4307 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4308 asoc->strmout = NULL; 4309 } 4310 if (asoc->mapping_array) { 4311 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4312 asoc->mapping_array = NULL; 4313 } 4314 if (asoc->nr_mapping_array) { 4315 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4316 asoc->nr_mapping_array = NULL; 4317 } 4318 SCTP_DECR_ASOC_COUNT(); 4319 SCTP_TCB_LOCK_DESTROY(stcb); 4320 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4321 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4322 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4323 SCTP_INP_WUNLOCK(inp); 4324 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4325 *error = ENOBUFS; 4326 return (NULL); 4327 } 4328 /* Init all the timers */ 4329 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4330 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4331 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4332 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4333 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4334 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4335 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4336 4337 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4338 /* now file the port under the hash as well */ 4339 if (inp->sctp_tcbhash != NULL) { 4340 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4341 inp->sctp_hashmark)]; 4342 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4343 } 4344 SCTP_INP_WUNLOCK(inp); 4345 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4346 return (stcb); 4347 } 4348 4349 4350 void 4351 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4352 { 4353 struct sctp_association *asoc; 4354 4355 asoc = &stcb->asoc; 4356 asoc->numnets--; 4357 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4358 if (net == asoc->primary_destination) { 4359 /* Reset primary */ 4360 struct sctp_nets *lnet; 4361 4362 lnet = TAILQ_FIRST(&asoc->nets); 4363 /* 4364 * Mobility adaptation Ideally, if deleted destination is 4365 * the primary, it becomes a fast retransmission trigger by 4366 * the subsequent SET PRIMARY. (by micchie) 4367 */ 4368 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4369 SCTP_MOBILITY_BASE) || 4370 sctp_is_mobility_feature_on(stcb->sctp_ep, 4371 SCTP_MOBILITY_FASTHANDOFF)) { 4372 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4373 if (asoc->deleted_primary != NULL) { 4374 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4375 goto out; 4376 } 4377 asoc->deleted_primary = net; 4378 atomic_add_int(&net->ref_count, 1); 4379 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4380 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4381 sctp_mobility_feature_on(stcb->sctp_ep, 4382 SCTP_MOBILITY_PRIM_DELETED); 4383 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4384 stcb->sctp_ep, stcb, NULL); 4385 } 4386 out: 4387 /* Try to find a confirmed primary */ 4388 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4389 } 4390 if (net == asoc->last_data_chunk_from) { 4391 /* Reset primary */ 4392 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4393 } 4394 if (net == asoc->last_control_chunk_from) { 4395 /* Clear net */ 4396 asoc->last_control_chunk_from = NULL; 4397 } 4398 if (net == stcb->asoc.alternate) { 4399 sctp_free_remote_addr(stcb->asoc.alternate); 4400 stcb->asoc.alternate = NULL; 4401 } 4402 sctp_free_remote_addr(net); 4403 } 4404 4405 /* 4406 * remove a remote endpoint address from an association, it will fail if the 4407 * address does not exist. 4408 */ 4409 int 4410 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4411 { 4412 /* 4413 * Here we need to remove a remote address. This is quite simple, we 4414 * first find it in the list of address for the association 4415 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4416 * on that item. Note we do not allow it to be removed if there are 4417 * no other addresses. 4418 */ 4419 struct sctp_association *asoc; 4420 struct sctp_nets *net, *nnet; 4421 4422 asoc = &stcb->asoc; 4423 4424 /* locate the address */ 4425 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4426 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4427 continue; 4428 } 4429 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4430 remaddr)) { 4431 /* we found the guy */ 4432 if (asoc->numnets < 2) { 4433 /* Must have at LEAST two remote addresses */ 4434 return (-1); 4435 } else { 4436 sctp_remove_net(stcb, net); 4437 return (0); 4438 } 4439 } 4440 } 4441 /* not found. */ 4442 return (-2); 4443 } 4444 4445 void 4446 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4447 { 4448 struct sctpvtaghead *chain; 4449 struct sctp_tagblock *twait_block; 4450 int found = 0; 4451 int i; 4452 4453 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4454 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4455 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4456 if ((twait_block->vtag_block[i].v_tag == tag) && 4457 (twait_block->vtag_block[i].lport == lport) && 4458 (twait_block->vtag_block[i].rport == rport)) { 4459 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4460 twait_block->vtag_block[i].v_tag = 0; 4461 twait_block->vtag_block[i].lport = 0; 4462 twait_block->vtag_block[i].rport = 0; 4463 found = 1; 4464 break; 4465 } 4466 } 4467 if (found) 4468 break; 4469 } 4470 } 4471 4472 int 4473 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4474 { 4475 struct sctpvtaghead *chain; 4476 struct sctp_tagblock *twait_block; 4477 int found = 0; 4478 int i; 4479 4480 SCTP_INP_INFO_WLOCK(); 4481 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4482 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4483 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4484 if ((twait_block->vtag_block[i].v_tag == tag) && 4485 (twait_block->vtag_block[i].lport == lport) && 4486 (twait_block->vtag_block[i].rport == rport)) { 4487 found = 1; 4488 break; 4489 } 4490 } 4491 if (found) 4492 break; 4493 } 4494 SCTP_INP_INFO_WUNLOCK(); 4495 return (found); 4496 } 4497 4498 4499 void 4500 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4501 { 4502 struct sctpvtaghead *chain; 4503 struct sctp_tagblock *twait_block; 4504 struct timeval now; 4505 int set, i; 4506 4507 if (time == 0) { 4508 /* Its disabled */ 4509 return; 4510 } 4511 (void)SCTP_GETTIME_TIMEVAL(&now); 4512 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4513 set = 0; 4514 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4515 /* Block(s) present, lets find space, and expire on the fly */ 4516 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4517 if ((twait_block->vtag_block[i].v_tag == 0) && 4518 !set) { 4519 twait_block->vtag_block[i].tv_sec_at_expire = 4520 now.tv_sec + time; 4521 twait_block->vtag_block[i].v_tag = tag; 4522 twait_block->vtag_block[i].lport = lport; 4523 twait_block->vtag_block[i].rport = rport; 4524 set = 1; 4525 } else if ((twait_block->vtag_block[i].v_tag) && 4526 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4527 /* Audit expires this guy */ 4528 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4529 twait_block->vtag_block[i].v_tag = 0; 4530 twait_block->vtag_block[i].lport = 0; 4531 twait_block->vtag_block[i].rport = 0; 4532 if (set == 0) { 4533 /* Reuse it for my new tag */ 4534 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4535 twait_block->vtag_block[i].v_tag = tag; 4536 twait_block->vtag_block[i].lport = lport; 4537 twait_block->vtag_block[i].rport = rport; 4538 set = 1; 4539 } 4540 } 4541 } 4542 if (set) { 4543 /* 4544 * We only do up to the block where we can place our 4545 * tag for audits 4546 */ 4547 break; 4548 } 4549 } 4550 /* Need to add a new block to chain */ 4551 if (!set) { 4552 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4553 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4554 if (twait_block == NULL) { 4555 #ifdef INVARIANTS 4556 panic("Can not alloc tagblock"); 4557 #endif 4558 return; 4559 } 4560 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4561 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4562 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4563 twait_block->vtag_block[0].v_tag = tag; 4564 twait_block->vtag_block[0].lport = lport; 4565 twait_block->vtag_block[0].rport = rport; 4566 } 4567 } 4568 4569 4570 4571 /*- 4572 * Free the association after un-hashing the remote port. This 4573 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4574 * expect that the input to this function IS a locked TCB. 4575 * It will return 0, if it did NOT destroy the association (instead 4576 * it unlocks it. It will return NON-zero if it either destroyed the 4577 * association OR the association is already destroyed. 4578 */ 4579 int 4580 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4581 { 4582 int i; 4583 struct sctp_association *asoc; 4584 struct sctp_nets *net, *nnet; 4585 struct sctp_laddr *laddr, *naddr; 4586 struct sctp_tmit_chunk *chk, *nchk; 4587 struct sctp_asconf_addr *aparam, *naparam; 4588 struct sctp_asconf_ack *aack, *naack; 4589 struct sctp_stream_reset_list *strrst, *nstrrst; 4590 struct sctp_queued_to_read *sq, *nsq; 4591 struct sctp_stream_queue_pending *sp, *nsp; 4592 sctp_sharedkey_t *shared_key, *nshared_key; 4593 struct socket *so; 4594 4595 /* first, lets purge the entry from the hash table. */ 4596 4597 #ifdef SCTP_LOG_CLOSING 4598 sctp_log_closing(inp, stcb, 6); 4599 #endif 4600 if (stcb->asoc.state == 0) { 4601 #ifdef SCTP_LOG_CLOSING 4602 sctp_log_closing(inp, NULL, 7); 4603 #endif 4604 /* there is no asoc, really TSNH :-0 */ 4605 return (1); 4606 } 4607 if (stcb->asoc.alternate) { 4608 sctp_free_remote_addr(stcb->asoc.alternate); 4609 stcb->asoc.alternate = NULL; 4610 } 4611 /* TEMP CODE */ 4612 if (stcb->freed_from_where == 0) { 4613 /* Only record the first place free happened from */ 4614 stcb->freed_from_where = from_location; 4615 } 4616 /* TEMP CODE */ 4617 4618 asoc = &stcb->asoc; 4619 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4620 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4621 /* nothing around */ 4622 so = NULL; 4623 else 4624 so = inp->sctp_socket; 4625 4626 /* 4627 * We used timer based freeing if a reader or writer is in the way. 4628 * So we first check if we are actually being called from a timer, 4629 * if so we abort early if a reader or writer is still in the way. 4630 */ 4631 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4632 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4633 /* 4634 * is it the timer driving us? if so are the reader/writers 4635 * gone? 4636 */ 4637 if (stcb->asoc.refcnt) { 4638 /* nope, reader or writer in the way */ 4639 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4640 /* no asoc destroyed */ 4641 SCTP_TCB_UNLOCK(stcb); 4642 #ifdef SCTP_LOG_CLOSING 4643 sctp_log_closing(inp, stcb, 8); 4644 #endif 4645 return (0); 4646 } 4647 } 4648 /* now clean up any other timers */ 4649 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4650 asoc->dack_timer.self = NULL; 4651 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4652 /*- 4653 * For stream reset we don't blast this unless 4654 * it is a str-reset timer, it might be the 4655 * free-asoc timer which we DON'T want to 4656 * disturb. 4657 */ 4658 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4659 asoc->strreset_timer.self = NULL; 4660 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4661 asoc->asconf_timer.self = NULL; 4662 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4663 asoc->autoclose_timer.self = NULL; 4664 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4665 asoc->shut_guard_timer.self = NULL; 4666 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4667 asoc->delayed_event_timer.self = NULL; 4668 /* Mobility adaptation */ 4669 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4670 asoc->delete_prim_timer.self = NULL; 4671 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4672 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4673 net->rxt_timer.self = NULL; 4674 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4675 net->pmtu_timer.self = NULL; 4676 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4677 net->hb_timer.self = NULL; 4678 } 4679 /* Now the read queue needs to be cleaned up (only once) */ 4680 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4681 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4682 SCTP_INP_READ_LOCK(inp); 4683 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4684 if (sq->stcb == stcb) { 4685 sq->do_not_ref_stcb = 1; 4686 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4687 /* 4688 * If there is no end, there never will be 4689 * now. 4690 */ 4691 if (sq->end_added == 0) { 4692 /* Held for PD-API clear that. */ 4693 sq->pdapi_aborted = 1; 4694 sq->held_length = 0; 4695 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4696 /* 4697 * Need to add a PD-API 4698 * aborted indication. 4699 * Setting the control_pdapi 4700 * assures that it will be 4701 * added right after this 4702 * msg. 4703 */ 4704 uint32_t strseq; 4705 4706 stcb->asoc.control_pdapi = sq; 4707 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4708 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4709 stcb, 4710 SCTP_PARTIAL_DELIVERY_ABORTED, 4711 (void *)&strseq, 4712 SCTP_SO_LOCKED); 4713 stcb->asoc.control_pdapi = NULL; 4714 } 4715 } 4716 /* Add an end to wake them */ 4717 sq->end_added = 1; 4718 } 4719 } 4720 SCTP_INP_READ_UNLOCK(inp); 4721 if (stcb->block_entry) { 4722 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4723 stcb->block_entry->error = ECONNRESET; 4724 stcb->block_entry = NULL; 4725 } 4726 } 4727 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4728 /* 4729 * Someone holds a reference OR the socket is unaccepted 4730 * yet. 4731 */ 4732 if ((stcb->asoc.refcnt) || 4733 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4734 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4735 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4736 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4737 } 4738 SCTP_TCB_UNLOCK(stcb); 4739 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4740 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4741 /* nothing around */ 4742 so = NULL; 4743 if (so) { 4744 /* Wake any reader/writers */ 4745 sctp_sorwakeup(inp, so); 4746 sctp_sowwakeup(inp, so); 4747 } 4748 #ifdef SCTP_LOG_CLOSING 4749 sctp_log_closing(inp, stcb, 9); 4750 #endif 4751 /* no asoc destroyed */ 4752 return (0); 4753 } 4754 #ifdef SCTP_LOG_CLOSING 4755 sctp_log_closing(inp, stcb, 10); 4756 #endif 4757 /* 4758 * When I reach here, no others want to kill the assoc yet.. and I 4759 * own the lock. Now its possible an abort comes in when I do the 4760 * lock exchange below to grab all the locks to do the final take 4761 * out. to prevent this we increment the count, which will start a 4762 * timer and blow out above thus assuring us that we hold exclusive 4763 * killing of the asoc. Note that after getting back the TCB lock we 4764 * will go ahead and increment the counter back up and stop any 4765 * timer a passing stranger may have started :-S 4766 */ 4767 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4768 atomic_add_int(&stcb->asoc.refcnt, 1); 4769 4770 SCTP_TCB_UNLOCK(stcb); 4771 SCTP_INP_INFO_WLOCK(); 4772 SCTP_INP_WLOCK(inp); 4773 SCTP_TCB_LOCK(stcb); 4774 } 4775 /* Double check the GONE flag */ 4776 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4777 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4778 /* nothing around */ 4779 so = NULL; 4780 4781 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4782 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4783 /* 4784 * For TCP type we need special handling when we are 4785 * connected. We also include the peel'ed off ones to. 4786 */ 4787 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4788 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4789 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4790 if (so) { 4791 SOCK_LOCK(so); 4792 if (so->so_rcv.sb_cc == 0) { 4793 so->so_state &= ~(SS_ISCONNECTING | 4794 SS_ISDISCONNECTING | 4795 SS_ISCONFIRMING | 4796 SS_ISCONNECTED); 4797 } 4798 socantrcvmore_locked(so); 4799 sctp_sowwakeup(inp, so); 4800 sctp_sorwakeup(inp, so); 4801 SCTP_SOWAKEUP(so); 4802 } 4803 } 4804 } 4805 /* 4806 * Make it invalid too, that way if its about to run it will abort 4807 * and return. 4808 */ 4809 /* re-increment the lock */ 4810 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4811 atomic_add_int(&stcb->asoc.refcnt, -1); 4812 } 4813 if (stcb->asoc.refcnt) { 4814 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4815 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4816 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4817 SCTP_INP_INFO_WUNLOCK(); 4818 SCTP_INP_WUNLOCK(inp); 4819 } 4820 SCTP_TCB_UNLOCK(stcb); 4821 return (0); 4822 } 4823 asoc->state = 0; 4824 if (inp->sctp_tcbhash) { 4825 LIST_REMOVE(stcb, sctp_tcbhash); 4826 } 4827 if (stcb->asoc.in_asocid_hash) { 4828 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4829 } 4830 /* Now lets remove it from the list of ALL associations in the EP */ 4831 LIST_REMOVE(stcb, sctp_tcblist); 4832 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4833 SCTP_INP_INCR_REF(inp); 4834 SCTP_INP_WUNLOCK(inp); 4835 } 4836 /* pull from vtag hash */ 4837 LIST_REMOVE(stcb, sctp_asocs); 4838 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4839 inp->sctp_lport, stcb->rport); 4840 4841 /* 4842 * Now restop the timers to be sure this is paranoia at is finest! 4843 */ 4844 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4845 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4846 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4847 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4848 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4849 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4850 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4851 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4852 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4853 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4854 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4855 } 4856 4857 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4858 /* 4859 * The chunk lists and such SHOULD be empty but we check them just 4860 * in case. 4861 */ 4862 /* anything on the wheel needs to be removed */ 4863 for (i = 0; i < asoc->streamoutcnt; i++) { 4864 struct sctp_stream_out *outs; 4865 4866 outs = &asoc->strmout[i]; 4867 /* now clean up any chunks here */ 4868 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4869 TAILQ_REMOVE(&outs->outqueue, sp, next); 4870 sctp_free_spbufspace(stcb, asoc, sp); 4871 if (sp->data) { 4872 if (so) { 4873 /* Still an open socket - report */ 4874 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4875 0, (void *)sp, SCTP_SO_LOCKED); 4876 } 4877 if (sp->data) { 4878 sctp_m_freem(sp->data); 4879 sp->data = NULL; 4880 sp->tail_mbuf = NULL; 4881 sp->length = 0; 4882 } 4883 } 4884 if (sp->net) { 4885 sctp_free_remote_addr(sp->net); 4886 sp->net = NULL; 4887 } 4888 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4889 } 4890 } 4891 /* sa_ignore FREED_MEMORY */ 4892 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4893 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4894 SCTP_FREE(strrst, SCTP_M_STRESET); 4895 } 4896 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4897 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4898 if (sq->data) { 4899 sctp_m_freem(sq->data); 4900 sq->data = NULL; 4901 } 4902 sctp_free_remote_addr(sq->whoFrom); 4903 sq->whoFrom = NULL; 4904 sq->stcb = NULL; 4905 /* Free the ctl entry */ 4906 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4907 SCTP_DECR_READQ_COUNT(); 4908 /* sa_ignore FREED_MEMORY */ 4909 } 4910 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4911 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4912 if (chk->data) { 4913 sctp_m_freem(chk->data); 4914 chk->data = NULL; 4915 } 4916 if (chk->holds_key_ref) 4917 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4918 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4919 SCTP_DECR_CHK_COUNT(); 4920 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4921 asoc->free_chunk_cnt--; 4922 /* sa_ignore FREED_MEMORY */ 4923 } 4924 /* pending send queue SHOULD be empty */ 4925 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4926 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4927 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4928 #ifdef INVARIANTS 4929 } else { 4930 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4931 #endif 4932 } 4933 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4934 if (chk->data) { 4935 if (so) { 4936 /* Still a socket? */ 4937 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4938 0, chk, SCTP_SO_LOCKED); 4939 } 4940 if (chk->data) { 4941 sctp_m_freem(chk->data); 4942 chk->data = NULL; 4943 } 4944 } 4945 if (chk->holds_key_ref) 4946 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4947 if (chk->whoTo) { 4948 sctp_free_remote_addr(chk->whoTo); 4949 chk->whoTo = NULL; 4950 } 4951 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4952 SCTP_DECR_CHK_COUNT(); 4953 /* sa_ignore FREED_MEMORY */ 4954 } 4955 /* sent queue SHOULD be empty */ 4956 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4957 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 4958 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4959 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4960 #ifdef INVARIANTS 4961 } else { 4962 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4963 #endif 4964 } 4965 } 4966 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4967 if (chk->data) { 4968 if (so) { 4969 /* Still a socket? */ 4970 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 4971 0, chk, SCTP_SO_LOCKED); 4972 } 4973 if (chk->data) { 4974 sctp_m_freem(chk->data); 4975 chk->data = NULL; 4976 } 4977 } 4978 if (chk->holds_key_ref) 4979 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4980 sctp_free_remote_addr(chk->whoTo); 4981 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4982 SCTP_DECR_CHK_COUNT(); 4983 /* sa_ignore FREED_MEMORY */ 4984 } 4985 #ifdef INVARIANTS 4986 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 4987 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 4988 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 4989 } 4990 } 4991 #endif 4992 /* control queue MAY not be empty */ 4993 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 4994 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4995 if (chk->data) { 4996 sctp_m_freem(chk->data); 4997 chk->data = NULL; 4998 } 4999 if (chk->holds_key_ref) 5000 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5001 sctp_free_remote_addr(chk->whoTo); 5002 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5003 SCTP_DECR_CHK_COUNT(); 5004 /* sa_ignore FREED_MEMORY */ 5005 } 5006 /* ASCONF queue MAY not be empty */ 5007 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5008 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5009 if (chk->data) { 5010 sctp_m_freem(chk->data); 5011 chk->data = NULL; 5012 } 5013 if (chk->holds_key_ref) 5014 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5015 sctp_free_remote_addr(chk->whoTo); 5016 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5017 SCTP_DECR_CHK_COUNT(); 5018 /* sa_ignore FREED_MEMORY */ 5019 } 5020 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5021 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5022 if (chk->data) { 5023 sctp_m_freem(chk->data); 5024 chk->data = NULL; 5025 } 5026 if (chk->holds_key_ref) 5027 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5028 sctp_free_remote_addr(chk->whoTo); 5029 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5030 SCTP_DECR_CHK_COUNT(); 5031 /* sa_ignore FREED_MEMORY */ 5032 } 5033 5034 if (asoc->mapping_array) { 5035 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5036 asoc->mapping_array = NULL; 5037 } 5038 if (asoc->nr_mapping_array) { 5039 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5040 asoc->nr_mapping_array = NULL; 5041 } 5042 /* the stream outs */ 5043 if (asoc->strmout) { 5044 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5045 asoc->strmout = NULL; 5046 } 5047 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5048 if (asoc->strmin) { 5049 struct sctp_queued_to_read *ctl, *nctl; 5050 5051 for (i = 0; i < asoc->streamincnt; i++) { 5052 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5053 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5054 sctp_free_remote_addr(ctl->whoFrom); 5055 if (ctl->data) { 5056 sctp_m_freem(ctl->data); 5057 ctl->data = NULL; 5058 } 5059 /* 5060 * We don't free the address here since all 5061 * the net's were freed above. 5062 */ 5063 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5064 SCTP_DECR_READQ_COUNT(); 5065 } 5066 } 5067 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5068 asoc->strmin = NULL; 5069 } 5070 asoc->streamincnt = 0; 5071 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5072 #ifdef INVARIANTS 5073 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5074 panic("no net's left alloc'ed, or list points to itself"); 5075 } 5076 #endif 5077 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5078 sctp_free_remote_addr(net); 5079 } 5080 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5081 /* sa_ignore FREED_MEMORY */ 5082 sctp_remove_laddr(laddr); 5083 } 5084 5085 /* pending asconf (address) parameters */ 5086 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5087 /* sa_ignore FREED_MEMORY */ 5088 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5089 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5090 } 5091 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5092 /* sa_ignore FREED_MEMORY */ 5093 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5094 if (aack->data != NULL) { 5095 sctp_m_freem(aack->data); 5096 } 5097 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5098 } 5099 /* clean up auth stuff */ 5100 if (asoc->local_hmacs) 5101 sctp_free_hmaclist(asoc->local_hmacs); 5102 if (asoc->peer_hmacs) 5103 sctp_free_hmaclist(asoc->peer_hmacs); 5104 5105 if (asoc->local_auth_chunks) 5106 sctp_free_chunklist(asoc->local_auth_chunks); 5107 if (asoc->peer_auth_chunks) 5108 sctp_free_chunklist(asoc->peer_auth_chunks); 5109 5110 sctp_free_authinfo(&asoc->authinfo); 5111 5112 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5113 LIST_REMOVE(shared_key, next); 5114 sctp_free_sharedkey(shared_key); 5115 /* sa_ignore FREED_MEMORY */ 5116 } 5117 5118 /* Insert new items here :> */ 5119 5120 /* Get rid of LOCK */ 5121 SCTP_TCB_LOCK_DESTROY(stcb); 5122 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5123 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5124 SCTP_INP_INFO_WUNLOCK(); 5125 SCTP_INP_RLOCK(inp); 5126 } 5127 #ifdef SCTP_TRACK_FREED_ASOCS 5128 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5129 /* now clean up the tasoc itself */ 5130 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5131 SCTP_DECR_ASOC_COUNT(); 5132 } else { 5133 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5134 } 5135 #else 5136 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5137 SCTP_DECR_ASOC_COUNT(); 5138 #endif 5139 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5140 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5141 /* 5142 * If its NOT the inp_free calling us AND sctp_close 5143 * as been called, we call back... 5144 */ 5145 SCTP_INP_RUNLOCK(inp); 5146 /* 5147 * This will start the kill timer (if we are the 5148 * last one) since we hold an increment yet. But 5149 * this is the only safe way to do this since 5150 * otherwise if the socket closes at the same time 5151 * we are here we might collide in the cleanup. 5152 */ 5153 sctp_inpcb_free(inp, 5154 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5155 SCTP_CALLED_DIRECTLY_NOCMPSET); 5156 SCTP_INP_DECR_REF(inp); 5157 goto out_of; 5158 } else { 5159 /* The socket is still open. */ 5160 SCTP_INP_DECR_REF(inp); 5161 } 5162 } 5163 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5164 SCTP_INP_RUNLOCK(inp); 5165 } 5166 out_of: 5167 /* destroyed the asoc */ 5168 #ifdef SCTP_LOG_CLOSING 5169 sctp_log_closing(inp, NULL, 11); 5170 #endif 5171 return (1); 5172 } 5173 5174 5175 5176 /* 5177 * determine if a destination is "reachable" based upon the addresses bound 5178 * to the current endpoint (e.g. only v4 or v6 currently bound) 5179 */ 5180 /* 5181 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5182 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5183 * types bound as its endpoint 5184 */ 5185 int 5186 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5187 { 5188 struct sctp_inpcb *inp; 5189 int answer; 5190 5191 /* 5192 * No locks here, the TCB, in all cases is already locked and an 5193 * assoc is up. There is either a INP lock by the caller applied (in 5194 * asconf case when deleting an address) or NOT in the HB case, 5195 * however if HB then the INP increment is up and the INP will not 5196 * be removed (on top of the fact that we have a TCB lock). So we 5197 * only want to read the sctp_flags, which is either bound-all or 5198 * not.. no protection needed since once an assoc is up you can't be 5199 * changing your binding. 5200 */ 5201 inp = stcb->sctp_ep; 5202 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5203 /* if bound all, destination is not restricted */ 5204 /* 5205 * RRS: Question during lock work: Is this correct? If you 5206 * are bound-all you still might need to obey the V4--V6 5207 * flags??? IMO this bound-all stuff needs to be removed! 5208 */ 5209 return (1); 5210 } 5211 /* NOTE: all "scope" checks are done when local addresses are added */ 5212 switch (destaddr->sa_family) { 5213 #ifdef INET6 5214 case AF_INET6: 5215 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5216 break; 5217 #endif 5218 #ifdef INET 5219 case AF_INET: 5220 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5221 break; 5222 #endif 5223 default: 5224 /* invalid family, so it's unreachable */ 5225 answer = 0; 5226 break; 5227 } 5228 return (answer); 5229 } 5230 5231 /* 5232 * update the inp_vflags on an endpoint 5233 */ 5234 static void 5235 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5236 { 5237 struct sctp_laddr *laddr; 5238 5239 /* first clear the flag */ 5240 inp->ip_inp.inp.inp_vflag = 0; 5241 /* set the flag based on addresses on the ep list */ 5242 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5243 if (laddr->ifa == NULL) { 5244 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5245 __FUNCTION__); 5246 continue; 5247 } 5248 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5249 continue; 5250 } 5251 switch (laddr->ifa->address.sa.sa_family) { 5252 #ifdef INET6 5253 case AF_INET6: 5254 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5255 break; 5256 #endif 5257 #ifdef INET 5258 case AF_INET: 5259 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5260 break; 5261 #endif 5262 default: 5263 break; 5264 } 5265 } 5266 } 5267 5268 /* 5269 * Add the address to the endpoint local address list There is nothing to be 5270 * done if we are bound to all addresses 5271 */ 5272 void 5273 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5274 { 5275 struct sctp_laddr *laddr; 5276 int fnd, error = 0; 5277 5278 fnd = 0; 5279 5280 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5281 /* You are already bound to all. You have it already */ 5282 return; 5283 } 5284 #ifdef INET6 5285 if (ifa->address.sa.sa_family == AF_INET6) { 5286 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5287 /* Can't bind a non-useable addr. */ 5288 return; 5289 } 5290 } 5291 #endif 5292 /* first, is it already present? */ 5293 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5294 if (laddr->ifa == ifa) { 5295 fnd = 1; 5296 break; 5297 } 5298 } 5299 5300 if (fnd == 0) { 5301 /* Not in the ep list */ 5302 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5303 if (error != 0) 5304 return; 5305 inp->laddr_count++; 5306 /* update inp_vflag flags */ 5307 switch (ifa->address.sa.sa_family) { 5308 #ifdef INET6 5309 case AF_INET6: 5310 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5311 break; 5312 #endif 5313 #ifdef INET 5314 case AF_INET: 5315 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5316 break; 5317 #endif 5318 default: 5319 break; 5320 } 5321 } 5322 return; 5323 } 5324 5325 5326 /* 5327 * select a new (hopefully reachable) destination net (should only be used 5328 * when we deleted an ep addr that is the only usable source address to reach 5329 * the destination net) 5330 */ 5331 static void 5332 sctp_select_primary_destination(struct sctp_tcb *stcb) 5333 { 5334 struct sctp_nets *net; 5335 5336 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5337 /* for now, we'll just pick the first reachable one we find */ 5338 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5339 continue; 5340 if (sctp_destination_is_reachable(stcb, 5341 (struct sockaddr *)&net->ro._l_addr)) { 5342 /* found a reachable destination */ 5343 stcb->asoc.primary_destination = net; 5344 } 5345 } 5346 /* I can't there from here! ...we're gonna die shortly... */ 5347 } 5348 5349 5350 /* 5351 * Delete the address from the endpoint local address list There is nothing 5352 * to be done if we are bound to all addresses 5353 */ 5354 void 5355 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5356 { 5357 struct sctp_laddr *laddr; 5358 int fnd; 5359 5360 fnd = 0; 5361 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5362 /* You are already bound to all. You have it already */ 5363 return; 5364 } 5365 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5366 if (laddr->ifa == ifa) { 5367 fnd = 1; 5368 break; 5369 } 5370 } 5371 if (fnd && (inp->laddr_count < 2)) { 5372 /* can't delete unless there are at LEAST 2 addresses */ 5373 return; 5374 } 5375 if (fnd) { 5376 /* 5377 * clean up any use of this address go through our 5378 * associations and clear any last_used_address that match 5379 * this one for each assoc, see if a new primary_destination 5380 * is needed 5381 */ 5382 struct sctp_tcb *stcb; 5383 5384 /* clean up "next_addr_touse" */ 5385 if (inp->next_addr_touse == laddr) 5386 /* delete this address */ 5387 inp->next_addr_touse = NULL; 5388 5389 /* clean up "last_used_address" */ 5390 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5391 struct sctp_nets *net; 5392 5393 SCTP_TCB_LOCK(stcb); 5394 if (stcb->asoc.last_used_address == laddr) 5395 /* delete this address */ 5396 stcb->asoc.last_used_address = NULL; 5397 /* 5398 * Now spin through all the nets and purge any ref 5399 * to laddr 5400 */ 5401 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5402 if (net->ro._s_addr && 5403 (net->ro._s_addr->ifa == laddr->ifa)) { 5404 /* Yep, purge src address selected */ 5405 sctp_rtentry_t *rt; 5406 5407 /* delete this address if cached */ 5408 rt = net->ro.ro_rt; 5409 if (rt != NULL) { 5410 RTFREE(rt); 5411 net->ro.ro_rt = NULL; 5412 } 5413 sctp_free_ifa(net->ro._s_addr); 5414 net->ro._s_addr = NULL; 5415 net->src_addr_selected = 0; 5416 } 5417 } 5418 SCTP_TCB_UNLOCK(stcb); 5419 } /* for each tcb */ 5420 /* remove it from the ep list */ 5421 sctp_remove_laddr(laddr); 5422 inp->laddr_count--; 5423 /* update inp_vflag flags */ 5424 sctp_update_ep_vflag(inp); 5425 } 5426 return; 5427 } 5428 5429 /* 5430 * Add the address to the TCB local address restricted list. 5431 * This is a "pending" address list (eg. addresses waiting for an 5432 * ASCONF-ACK response) and cannot be used as a valid source address. 5433 */ 5434 void 5435 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5436 { 5437 struct sctp_laddr *laddr; 5438 struct sctpladdr *list; 5439 5440 /* 5441 * Assumes TCB is locked.. and possibly the INP. May need to 5442 * confirm/fix that if we need it and is not the case. 5443 */ 5444 list = &stcb->asoc.sctp_restricted_addrs; 5445 5446 #ifdef INET6 5447 if (ifa->address.sa.sa_family == AF_INET6) { 5448 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5449 /* Can't bind a non-existent addr. */ 5450 return; 5451 } 5452 } 5453 #endif 5454 /* does the address already exist? */ 5455 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5456 if (laddr->ifa == ifa) { 5457 return; 5458 } 5459 } 5460 5461 /* add to the list */ 5462 (void)sctp_insert_laddr(list, ifa, 0); 5463 return; 5464 } 5465 5466 /* 5467 * insert an laddr entry with the given ifa for the desired list 5468 */ 5469 int 5470 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5471 { 5472 struct sctp_laddr *laddr; 5473 5474 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5475 if (laddr == NULL) { 5476 /* out of memory? */ 5477 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5478 return (EINVAL); 5479 } 5480 SCTP_INCR_LADDR_COUNT(); 5481 bzero(laddr, sizeof(*laddr)); 5482 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5483 laddr->ifa = ifa; 5484 laddr->action = act; 5485 atomic_add_int(&ifa->refcount, 1); 5486 /* insert it */ 5487 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5488 5489 return (0); 5490 } 5491 5492 /* 5493 * Remove an laddr entry from the local address list (on an assoc) 5494 */ 5495 void 5496 sctp_remove_laddr(struct sctp_laddr *laddr) 5497 { 5498 5499 /* remove from the list */ 5500 LIST_REMOVE(laddr, sctp_nxt_addr); 5501 sctp_free_ifa(laddr->ifa); 5502 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5503 SCTP_DECR_LADDR_COUNT(); 5504 } 5505 5506 /* 5507 * Remove a local address from the TCB local address restricted list 5508 */ 5509 void 5510 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5511 { 5512 struct sctp_inpcb *inp; 5513 struct sctp_laddr *laddr; 5514 5515 /* 5516 * This is called by asconf work. It is assumed that a) The TCB is 5517 * locked and b) The INP is locked. This is true in as much as I can 5518 * trace through the entry asconf code where I did these locks. 5519 * Again, the ASCONF code is a bit different in that it does lock 5520 * the INP during its work often times. This must be since we don't 5521 * want other proc's looking up things while what they are looking 5522 * up is changing :-D 5523 */ 5524 5525 inp = stcb->sctp_ep; 5526 /* if subset bound and don't allow ASCONF's, can't delete last */ 5527 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5528 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5529 if (stcb->sctp_ep->laddr_count < 2) { 5530 /* can't delete last address */ 5531 return; 5532 } 5533 } 5534 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5535 /* remove the address if it exists */ 5536 if (laddr->ifa == NULL) 5537 continue; 5538 if (laddr->ifa == ifa) { 5539 sctp_remove_laddr(laddr); 5540 return; 5541 } 5542 } 5543 5544 /* address not found! */ 5545 return; 5546 } 5547 5548 /* 5549 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5550 */ 5551 /* sysctl */ 5552 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5553 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5554 5555 5556 5557 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5558 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5559 int *sctp_cpuarry = NULL; 5560 void 5561 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5562 { 5563 /* Queue a packet to a processor for the specified core */ 5564 struct sctp_mcore_queue *qent; 5565 struct sctp_mcore_ctrl *wkq; 5566 int need_wake = 0; 5567 5568 if (sctp_mcore_workers == NULL) { 5569 /* Something went way bad during setup */ 5570 sctp_input_with_port(m, off, 0); 5571 return; 5572 } 5573 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5574 (sizeof(struct sctp_mcore_queue)), 5575 SCTP_M_MCORE); 5576 if (qent == NULL) { 5577 /* This is trouble */ 5578 sctp_input_with_port(m, off, 0); 5579 return; 5580 } 5581 qent->vn = curvnet; 5582 qent->m = m; 5583 qent->off = off; 5584 qent->v6 = 0; 5585 wkq = &sctp_mcore_workers[cpu_to_use]; 5586 SCTP_MCORE_QLOCK(wkq); 5587 5588 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5589 if (wkq->running == 0) { 5590 need_wake = 1; 5591 } 5592 SCTP_MCORE_QUNLOCK(wkq); 5593 if (need_wake) { 5594 wakeup(&wkq->running); 5595 } 5596 } 5597 5598 static void 5599 sctp_mcore_thread(void *arg) 5600 { 5601 5602 struct sctp_mcore_ctrl *wkq; 5603 struct sctp_mcore_queue *qent; 5604 5605 wkq = (struct sctp_mcore_ctrl *)arg; 5606 struct mbuf *m; 5607 int off, v6; 5608 5609 /* Wait for first tickle */ 5610 SCTP_MCORE_LOCK(wkq); 5611 wkq->running = 0; 5612 msleep(&wkq->running, 5613 &wkq->core_mtx, 5614 0, "wait for pkt", 0); 5615 SCTP_MCORE_UNLOCK(wkq); 5616 5617 /* Bind to our cpu */ 5618 thread_lock(curthread); 5619 sched_bind(curthread, wkq->cpuid); 5620 thread_unlock(curthread); 5621 5622 /* Now lets start working */ 5623 SCTP_MCORE_LOCK(wkq); 5624 /* Now grab lock and go */ 5625 for (;;) { 5626 SCTP_MCORE_QLOCK(wkq); 5627 skip_sleep: 5628 wkq->running = 1; 5629 qent = TAILQ_FIRST(&wkq->que); 5630 if (qent) { 5631 TAILQ_REMOVE(&wkq->que, qent, next); 5632 SCTP_MCORE_QUNLOCK(wkq); 5633 CURVNET_SET(qent->vn); 5634 m = qent->m; 5635 off = qent->off; 5636 v6 = qent->v6; 5637 SCTP_FREE(qent, SCTP_M_MCORE); 5638 if (v6 == 0) { 5639 sctp_input_with_port(m, off, 0); 5640 } else { 5641 SCTP_PRINTF("V6 not yet supported\n"); 5642 sctp_m_freem(m); 5643 } 5644 CURVNET_RESTORE(); 5645 SCTP_MCORE_QLOCK(wkq); 5646 } 5647 wkq->running = 0; 5648 if (!TAILQ_EMPTY(&wkq->que)) { 5649 goto skip_sleep; 5650 } 5651 SCTP_MCORE_QUNLOCK(wkq); 5652 msleep(&wkq->running, 5653 &wkq->core_mtx, 5654 0, "wait for pkt", 0); 5655 } 5656 } 5657 5658 static void 5659 sctp_startup_mcore_threads(void) 5660 { 5661 int i, cpu; 5662 5663 if (mp_ncpus == 1) 5664 return; 5665 5666 if (sctp_mcore_workers != NULL) { 5667 /* 5668 * Already been here in some previous vnet? 5669 */ 5670 return; 5671 } 5672 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5673 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5674 SCTP_M_MCORE); 5675 if (sctp_mcore_workers == NULL) { 5676 /* TSNH I hope */ 5677 return; 5678 } 5679 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5680 sizeof(struct sctp_mcore_ctrl))); 5681 /* Init the structures */ 5682 for (i = 0; i <= mp_maxid; i++) { 5683 TAILQ_INIT(&sctp_mcore_workers[i].que); 5684 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5685 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5686 sctp_mcore_workers[i].cpuid = i; 5687 } 5688 if (sctp_cpuarry == NULL) { 5689 SCTP_MALLOC(sctp_cpuarry, int *, 5690 (mp_ncpus * sizeof(int)), 5691 SCTP_M_MCORE); 5692 i = 0; 5693 CPU_FOREACH(cpu) { 5694 sctp_cpuarry[i] = cpu; 5695 i++; 5696 } 5697 } 5698 /* Now start them all */ 5699 CPU_FOREACH(cpu) { 5700 (void)kproc_create(sctp_mcore_thread, 5701 (void *)&sctp_mcore_workers[cpu], 5702 &sctp_mcore_workers[cpu].thread_proc, 5703 RFPROC, 5704 SCTP_KTHREAD_PAGES, 5705 SCTP_MCORE_NAME); 5706 5707 } 5708 } 5709 5710 #endif 5711 5712 void 5713 sctp_pcb_init() 5714 { 5715 /* 5716 * SCTP initialization for the PCB structures should be called by 5717 * the sctp_init() funciton. 5718 */ 5719 int i; 5720 struct timeval tv; 5721 5722 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5723 /* error I was called twice */ 5724 return; 5725 } 5726 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5727 5728 #if defined(SCTP_LOCAL_TRACE_BUF) 5729 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5730 #endif 5731 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5732 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5733 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5734 SCTP_M_MCORE); 5735 #endif 5736 (void)SCTP_GETTIME_TIMEVAL(&tv); 5737 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5738 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5739 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5740 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5741 #else 5742 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5743 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5744 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5745 #endif 5746 /* init the empty list of (All) Endpoints */ 5747 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5748 5749 5750 /* init the hash table of endpoints */ 5751 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5752 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5753 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5754 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5755 &SCTP_BASE_INFO(hashasocmark)); 5756 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5757 &SCTP_BASE_INFO(hashmark)); 5758 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5759 &SCTP_BASE_INFO(hashtcpmark)); 5760 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5761 5762 5763 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5764 &SCTP_BASE_INFO(hashvrfmark)); 5765 5766 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5767 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5768 /* init the zones */ 5769 /* 5770 * FIX ME: Should check for NULL returns, but if it does fail we are 5771 * doomed to panic anyways... add later maybe. 5772 */ 5773 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5774 sizeof(struct sctp_inpcb), maxsockets); 5775 5776 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5777 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5778 5779 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5780 sizeof(struct sctp_laddr), 5781 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5782 5783 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5784 sizeof(struct sctp_nets), 5785 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5786 5787 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5788 sizeof(struct sctp_tmit_chunk), 5789 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5790 5791 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5792 sizeof(struct sctp_queued_to_read), 5793 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5794 5795 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5796 sizeof(struct sctp_stream_queue_pending), 5797 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5798 5799 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5800 sizeof(struct sctp_asconf), 5801 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5802 5803 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5804 sizeof(struct sctp_asconf_ack), 5805 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5806 5807 5808 /* Master Lock INIT for info structure */ 5809 SCTP_INP_INFO_LOCK_INIT(); 5810 SCTP_STATLOG_INIT_LOCK(); 5811 5812 SCTP_IPI_COUNT_INIT(); 5813 SCTP_IPI_ADDR_INIT(); 5814 #ifdef SCTP_PACKET_LOGGING 5815 SCTP_IP_PKTLOG_INIT(); 5816 #endif 5817 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5818 5819 SCTP_WQ_ADDR_INIT(); 5820 /* not sure if we need all the counts */ 5821 SCTP_BASE_INFO(ipi_count_ep) = 0; 5822 /* assoc/tcb zone info */ 5823 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5824 /* local addrlist zone info */ 5825 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5826 /* remote addrlist zone info */ 5827 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5828 /* chunk info */ 5829 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5830 5831 /* socket queue zone info */ 5832 SCTP_BASE_INFO(ipi_count_readq) = 0; 5833 5834 /* stream out queue cont */ 5835 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5836 5837 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5838 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5839 5840 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5841 5842 /* Init the TIMEWAIT list */ 5843 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5844 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5845 } 5846 5847 sctp_startup_iterator(); 5848 5849 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5850 sctp_startup_mcore_threads(); 5851 #endif 5852 5853 /* 5854 * INIT the default VRF which for BSD is the only one, other O/S's 5855 * may have more. But initially they must start with one and then 5856 * add the VRF's as addresses are added. 5857 */ 5858 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5859 } 5860 5861 /* 5862 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5863 */ 5864 void 5865 sctp_pcb_finish(void) 5866 { 5867 struct sctp_vrflist *vrf_bucket; 5868 struct sctp_vrf *vrf, *nvrf; 5869 struct sctp_ifn *ifn, *nifn; 5870 struct sctp_ifa *ifa, *nifa; 5871 struct sctpvtaghead *chain; 5872 struct sctp_tagblock *twait_block, *prev_twait_block; 5873 struct sctp_laddr *wi, *nwi; 5874 int i; 5875 5876 /* 5877 * Free BSD the it thread never exits but we do clean up. The only 5878 * way freebsd reaches here if we have VRF's but we still add the 5879 * ifdef to make it compile on old versions. 5880 */ 5881 { 5882 struct sctp_iterator *it, *nit; 5883 5884 SCTP_IPI_ITERATOR_WQ_LOCK(); 5885 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5886 if (it->vn != curvnet) { 5887 continue; 5888 } 5889 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5890 if (it->function_atend != NULL) { 5891 (*it->function_atend) (it->pointer, it->val); 5892 } 5893 SCTP_FREE(it, SCTP_M_ITER); 5894 } 5895 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5896 SCTP_ITERATOR_LOCK(); 5897 if ((sctp_it_ctl.cur_it) && 5898 (sctp_it_ctl.cur_it->vn == curvnet)) { 5899 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5900 } 5901 SCTP_ITERATOR_UNLOCK(); 5902 } 5903 5904 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5905 SCTP_WQ_ADDR_LOCK(); 5906 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5907 LIST_REMOVE(wi, sctp_nxt_addr); 5908 SCTP_DECR_LADDR_COUNT(); 5909 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5910 } 5911 SCTP_WQ_ADDR_UNLOCK(); 5912 5913 /* 5914 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5915 * destroyed first). 5916 */ 5917 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5918 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5919 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5920 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5921 /* free the ifa */ 5922 LIST_REMOVE(ifa, next_bucket); 5923 LIST_REMOVE(ifa, next_ifa); 5924 SCTP_FREE(ifa, SCTP_M_IFA); 5925 } 5926 /* free the ifn */ 5927 LIST_REMOVE(ifn, next_bucket); 5928 LIST_REMOVE(ifn, next_ifn); 5929 SCTP_FREE(ifn, SCTP_M_IFN); 5930 } 5931 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5932 /* free the vrf */ 5933 LIST_REMOVE(vrf, next_vrf); 5934 SCTP_FREE(vrf, SCTP_M_VRF); 5935 } 5936 /* free the vrf hashes */ 5937 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5938 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5939 5940 /* 5941 * free the TIMEWAIT list elements malloc'd in the function 5942 * sctp_add_vtag_to_timewait()... 5943 */ 5944 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5945 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5946 if (!LIST_EMPTY(chain)) { 5947 prev_twait_block = NULL; 5948 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5949 if (prev_twait_block) { 5950 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5951 } 5952 prev_twait_block = twait_block; 5953 } 5954 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5955 } 5956 } 5957 5958 /* free the locks and mutexes */ 5959 #ifdef SCTP_PACKET_LOGGING 5960 SCTP_IP_PKTLOG_DESTROY(); 5961 #endif 5962 SCTP_IPI_ADDR_DESTROY(); 5963 SCTP_STATLOG_DESTROY(); 5964 SCTP_INP_INFO_LOCK_DESTROY(); 5965 5966 SCTP_WQ_ADDR_DESTROY(); 5967 5968 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5969 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5970 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5971 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5972 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5973 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5974 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5975 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5976 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5977 /* Get rid of other stuff to */ 5978 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5979 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5980 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5981 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5982 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5983 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5984 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5985 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5986 #endif 5987 } 5988 5989 5990 int 5991 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5992 int offset, int limit, 5993 struct sockaddr *src, struct sockaddr *dst, 5994 struct sockaddr *altsa) 5995 { 5996 /* 5997 * grub through the INIT pulling addresses and loading them to the 5998 * nets structure in the asoc. The from address in the mbuf should 5999 * also be loaded (if it is not already). This routine can be called 6000 * with either INIT or INIT-ACK's as long as the m points to the IP 6001 * packet and the offset points to the beginning of the parameters. 6002 */ 6003 struct sctp_inpcb *inp; 6004 struct sctp_nets *net, *nnet, *net_tmp; 6005 struct sctp_paramhdr *phdr, parm_buf; 6006 struct sctp_tcb *stcb_tmp; 6007 uint16_t ptype, plen; 6008 struct sockaddr *sa; 6009 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6010 struct sctp_auth_random *p_random = NULL; 6011 uint16_t random_len = 0; 6012 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6013 struct sctp_auth_hmac_algo *hmacs = NULL; 6014 uint16_t hmacs_len = 0; 6015 uint8_t saw_asconf = 0; 6016 uint8_t saw_asconf_ack = 0; 6017 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6018 struct sctp_auth_chunk_list *chunks = NULL; 6019 uint16_t num_chunks = 0; 6020 sctp_key_t *new_key; 6021 uint32_t keylen; 6022 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6023 uint8_t ecn_allowed; 6024 6025 #ifdef INET 6026 struct sockaddr_in sin; 6027 6028 #endif 6029 #ifdef INET6 6030 struct sockaddr_in6 sin6; 6031 6032 #endif 6033 6034 /* First get the destination address setup too. */ 6035 #ifdef INET 6036 memset(&sin, 0, sizeof(sin)); 6037 sin.sin_family = AF_INET; 6038 sin.sin_len = sizeof(sin); 6039 sin.sin_port = stcb->rport; 6040 #endif 6041 #ifdef INET6 6042 memset(&sin6, 0, sizeof(sin6)); 6043 sin6.sin6_family = AF_INET6; 6044 sin6.sin6_len = sizeof(struct sockaddr_in6); 6045 sin6.sin6_port = stcb->rport; 6046 #endif 6047 if (altsa) { 6048 sa = altsa; 6049 } else { 6050 sa = src; 6051 } 6052 /* Turn off ECN until we get through all params */ 6053 ecn_allowed = 0; 6054 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6055 /* mark all addresses that we have currently on the list */ 6056 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6057 } 6058 /* does the source address already exist? if so skip it */ 6059 inp = stcb->sctp_ep; 6060 atomic_add_int(&stcb->asoc.refcnt, 1); 6061 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6062 atomic_add_int(&stcb->asoc.refcnt, -1); 6063 6064 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6065 /* we must add the source address */ 6066 /* no scope set here since we have a tcb already. */ 6067 switch (sa->sa_family) { 6068 #ifdef INET 6069 case AF_INET: 6070 if (stcb->asoc.scope.ipv4_addr_legal) { 6071 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6072 return (-1); 6073 } 6074 } 6075 break; 6076 #endif 6077 #ifdef INET6 6078 case AF_INET6: 6079 if (stcb->asoc.scope.ipv6_addr_legal) { 6080 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6081 return (-2); 6082 } 6083 } 6084 break; 6085 #endif 6086 default: 6087 break; 6088 } 6089 } else { 6090 if (net_tmp != NULL && stcb_tmp == stcb) { 6091 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6092 } else if (stcb_tmp != stcb) { 6093 /* It belongs to another association? */ 6094 if (stcb_tmp) 6095 SCTP_TCB_UNLOCK(stcb_tmp); 6096 return (-3); 6097 } 6098 } 6099 if (stcb->asoc.state == 0) { 6100 /* the assoc was freed? */ 6101 return (-4); 6102 } 6103 /* 6104 * peer must explicitly turn this on. This may have been initialized 6105 * to be "on" in order to allow local addr changes while INIT's are 6106 * in flight. 6107 */ 6108 stcb->asoc.peer_supports_asconf = 0; 6109 /* now we must go through each of the params. */ 6110 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6111 while (phdr) { 6112 ptype = ntohs(phdr->param_type); 6113 plen = ntohs(phdr->param_length); 6114 /* 6115 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6116 * (uint32_t)ptype, (int)plen); 6117 */ 6118 if (offset + plen > limit) { 6119 break; 6120 } 6121 if (plen == 0) { 6122 break; 6123 } 6124 #ifdef INET 6125 if (ptype == SCTP_IPV4_ADDRESS) { 6126 if (stcb->asoc.scope.ipv4_addr_legal) { 6127 struct sctp_ipv4addr_param *p4, p4_buf; 6128 6129 /* ok get the v4 address and check/add */ 6130 phdr = sctp_get_next_param(m, offset, 6131 (struct sctp_paramhdr *)&p4_buf, 6132 sizeof(p4_buf)); 6133 if (plen != sizeof(struct sctp_ipv4addr_param) || 6134 phdr == NULL) { 6135 return (-5); 6136 } 6137 p4 = (struct sctp_ipv4addr_param *)phdr; 6138 sin.sin_addr.s_addr = p4->addr; 6139 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6140 /* Skip multi-cast addresses */ 6141 goto next_param; 6142 } 6143 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6144 (sin.sin_addr.s_addr == INADDR_ANY)) { 6145 goto next_param; 6146 } 6147 sa = (struct sockaddr *)&sin; 6148 inp = stcb->sctp_ep; 6149 atomic_add_int(&stcb->asoc.refcnt, 1); 6150 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6151 dst, stcb); 6152 atomic_add_int(&stcb->asoc.refcnt, -1); 6153 6154 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6155 inp == NULL) { 6156 /* we must add the source address */ 6157 /* 6158 * no scope set since we have a tcb 6159 * already 6160 */ 6161 6162 /* 6163 * we must validate the state again 6164 * here 6165 */ 6166 add_it_now: 6167 if (stcb->asoc.state == 0) { 6168 /* the assoc was freed? */ 6169 return (-7); 6170 } 6171 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6172 return (-8); 6173 } 6174 } else if (stcb_tmp == stcb) { 6175 if (stcb->asoc.state == 0) { 6176 /* the assoc was freed? */ 6177 return (-10); 6178 } 6179 if (net != NULL) { 6180 /* clear flag */ 6181 net->dest_state &= 6182 ~SCTP_ADDR_NOT_IN_ASSOC; 6183 } 6184 } else { 6185 /* 6186 * strange, address is in another 6187 * assoc? straighten out locks. 6188 */ 6189 if (stcb_tmp) { 6190 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6191 /* 6192 * in setup state we 6193 * abort this guy 6194 */ 6195 sctp_abort_an_association(stcb_tmp->sctp_ep, 6196 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6197 goto add_it_now; 6198 } 6199 SCTP_TCB_UNLOCK(stcb_tmp); 6200 } 6201 if (stcb->asoc.state == 0) { 6202 /* the assoc was freed? */ 6203 return (-12); 6204 } 6205 return (-13); 6206 } 6207 } 6208 } else 6209 #endif 6210 #ifdef INET6 6211 if (ptype == SCTP_IPV6_ADDRESS) { 6212 if (stcb->asoc.scope.ipv6_addr_legal) { 6213 /* ok get the v6 address and check/add */ 6214 struct sctp_ipv6addr_param *p6, p6_buf; 6215 6216 phdr = sctp_get_next_param(m, offset, 6217 (struct sctp_paramhdr *)&p6_buf, 6218 sizeof(p6_buf)); 6219 if (plen != sizeof(struct sctp_ipv6addr_param) || 6220 phdr == NULL) { 6221 return (-14); 6222 } 6223 p6 = (struct sctp_ipv6addr_param *)phdr; 6224 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6225 sizeof(p6->addr)); 6226 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6227 /* Skip multi-cast addresses */ 6228 goto next_param; 6229 } 6230 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6231 /* 6232 * Link local make no sense without 6233 * scope 6234 */ 6235 goto next_param; 6236 } 6237 sa = (struct sockaddr *)&sin6; 6238 inp = stcb->sctp_ep; 6239 atomic_add_int(&stcb->asoc.refcnt, 1); 6240 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6241 dst, stcb); 6242 atomic_add_int(&stcb->asoc.refcnt, -1); 6243 if (stcb_tmp == NULL && 6244 (inp == stcb->sctp_ep || inp == NULL)) { 6245 /* 6246 * we must validate the state again 6247 * here 6248 */ 6249 add_it_now6: 6250 if (stcb->asoc.state == 0) { 6251 /* the assoc was freed? */ 6252 return (-16); 6253 } 6254 /* 6255 * we must add the address, no scope 6256 * set 6257 */ 6258 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6259 return (-17); 6260 } 6261 } else if (stcb_tmp == stcb) { 6262 /* 6263 * we must validate the state again 6264 * here 6265 */ 6266 if (stcb->asoc.state == 0) { 6267 /* the assoc was freed? */ 6268 return (-19); 6269 } 6270 if (net != NULL) { 6271 /* clear flag */ 6272 net->dest_state &= 6273 ~SCTP_ADDR_NOT_IN_ASSOC; 6274 } 6275 } else { 6276 /* 6277 * strange, address is in another 6278 * assoc? straighten out locks. 6279 */ 6280 if (stcb_tmp) 6281 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6282 /* 6283 * in setup state we 6284 * abort this guy 6285 */ 6286 sctp_abort_an_association(stcb_tmp->sctp_ep, 6287 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6288 goto add_it_now6; 6289 } 6290 SCTP_TCB_UNLOCK(stcb_tmp); 6291 6292 if (stcb->asoc.state == 0) { 6293 /* the assoc was freed? */ 6294 return (-21); 6295 } 6296 return (-22); 6297 } 6298 } 6299 } else 6300 #endif 6301 if (ptype == SCTP_ECN_CAPABLE) { 6302 ecn_allowed = 1; 6303 } else if (ptype == SCTP_ULP_ADAPTATION) { 6304 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6305 struct sctp_adaptation_layer_indication ai, 6306 *aip; 6307 6308 phdr = sctp_get_next_param(m, offset, 6309 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6310 aip = (struct sctp_adaptation_layer_indication *)phdr; 6311 if (aip) { 6312 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6313 stcb->asoc.adaptation_needed = 1; 6314 } 6315 } 6316 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6317 struct sctp_asconf_addr_param lstore, *fee; 6318 int lptype; 6319 struct sockaddr *lsa = NULL; 6320 6321 #ifdef INET 6322 struct sctp_asconf_addrv4_param *fii; 6323 6324 #endif 6325 6326 stcb->asoc.peer_supports_asconf = 1; 6327 if (plen > sizeof(lstore)) { 6328 return (-23); 6329 } 6330 phdr = sctp_get_next_param(m, offset, 6331 (struct sctp_paramhdr *)&lstore, 6332 min(plen, sizeof(lstore))); 6333 if (phdr == NULL) { 6334 return (-24); 6335 } 6336 fee = (struct sctp_asconf_addr_param *)phdr; 6337 lptype = ntohs(fee->addrp.ph.param_type); 6338 switch (lptype) { 6339 #ifdef INET 6340 case SCTP_IPV4_ADDRESS: 6341 if (plen != 6342 sizeof(struct sctp_asconf_addrv4_param)) { 6343 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6344 (int)sizeof(struct sctp_asconf_addrv4_param), 6345 plen); 6346 } else { 6347 fii = (struct sctp_asconf_addrv4_param *)fee; 6348 sin.sin_addr.s_addr = fii->addrp.addr; 6349 lsa = (struct sockaddr *)&sin; 6350 } 6351 break; 6352 #endif 6353 #ifdef INET6 6354 case SCTP_IPV6_ADDRESS: 6355 if (plen != 6356 sizeof(struct sctp_asconf_addr_param)) { 6357 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6358 (int)sizeof(struct sctp_asconf_addr_param), 6359 plen); 6360 } else { 6361 memcpy(sin6.sin6_addr.s6_addr, 6362 fee->addrp.addr, 6363 sizeof(fee->addrp.addr)); 6364 lsa = (struct sockaddr *)&sin6; 6365 } 6366 break; 6367 #endif 6368 default: 6369 break; 6370 } 6371 if (lsa) { 6372 (void)sctp_set_primary_addr(stcb, sa, NULL); 6373 } 6374 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6375 stcb->asoc.peer_supports_nat = 1; 6376 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6377 /* Peer supports pr-sctp */ 6378 stcb->asoc.peer_supports_prsctp = 1; 6379 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6380 /* A supported extension chunk */ 6381 struct sctp_supported_chunk_types_param *pr_supported; 6382 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6383 int num_ent, i; 6384 6385 phdr = sctp_get_next_param(m, offset, 6386 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6387 if (phdr == NULL) { 6388 return (-25); 6389 } 6390 stcb->asoc.peer_supports_asconf = 0; 6391 stcb->asoc.peer_supports_prsctp = 0; 6392 stcb->asoc.peer_supports_pktdrop = 0; 6393 stcb->asoc.peer_supports_strreset = 0; 6394 stcb->asoc.peer_supports_nr_sack = 0; 6395 stcb->asoc.peer_supports_auth = 0; 6396 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6397 num_ent = plen - sizeof(struct sctp_paramhdr); 6398 for (i = 0; i < num_ent; i++) { 6399 switch (pr_supported->chunk_types[i]) { 6400 case SCTP_ASCONF: 6401 case SCTP_ASCONF_ACK: 6402 stcb->asoc.peer_supports_asconf = 1; 6403 break; 6404 case SCTP_FORWARD_CUM_TSN: 6405 stcb->asoc.peer_supports_prsctp = 1; 6406 break; 6407 case SCTP_PACKET_DROPPED: 6408 stcb->asoc.peer_supports_pktdrop = 1; 6409 break; 6410 case SCTP_NR_SELECTIVE_ACK: 6411 stcb->asoc.peer_supports_nr_sack = 1; 6412 break; 6413 case SCTP_STREAM_RESET: 6414 stcb->asoc.peer_supports_strreset = 1; 6415 break; 6416 case SCTP_AUTHENTICATION: 6417 stcb->asoc.peer_supports_auth = 1; 6418 break; 6419 default: 6420 /* one I have not learned yet */ 6421 break; 6422 6423 } 6424 } 6425 } else if (ptype == SCTP_RANDOM) { 6426 if (plen > sizeof(random_store)) 6427 break; 6428 if (got_random) { 6429 /* already processed a RANDOM */ 6430 goto next_param; 6431 } 6432 phdr = sctp_get_next_param(m, offset, 6433 (struct sctp_paramhdr *)random_store, 6434 min(sizeof(random_store), plen)); 6435 if (phdr == NULL) 6436 return (-26); 6437 p_random = (struct sctp_auth_random *)phdr; 6438 random_len = plen - sizeof(*p_random); 6439 /* enforce the random length */ 6440 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6441 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6442 return (-27); 6443 } 6444 got_random = 1; 6445 } else if (ptype == SCTP_HMAC_LIST) { 6446 int num_hmacs; 6447 int i; 6448 6449 if (plen > sizeof(hmacs_store)) 6450 break; 6451 if (got_hmacs) { 6452 /* already processed a HMAC list */ 6453 goto next_param; 6454 } 6455 phdr = sctp_get_next_param(m, offset, 6456 (struct sctp_paramhdr *)hmacs_store, 6457 min(plen, sizeof(hmacs_store))); 6458 if (phdr == NULL) 6459 return (-28); 6460 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6461 hmacs_len = plen - sizeof(*hmacs); 6462 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6463 /* validate the hmac list */ 6464 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6465 return (-29); 6466 } 6467 if (stcb->asoc.peer_hmacs != NULL) 6468 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6469 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6470 if (stcb->asoc.peer_hmacs != NULL) { 6471 for (i = 0; i < num_hmacs; i++) { 6472 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6473 ntohs(hmacs->hmac_ids[i])); 6474 } 6475 } 6476 got_hmacs = 1; 6477 } else if (ptype == SCTP_CHUNK_LIST) { 6478 int i; 6479 6480 if (plen > sizeof(chunks_store)) 6481 break; 6482 if (got_chklist) { 6483 /* already processed a Chunks list */ 6484 goto next_param; 6485 } 6486 phdr = sctp_get_next_param(m, offset, 6487 (struct sctp_paramhdr *)chunks_store, 6488 min(plen, sizeof(chunks_store))); 6489 if (phdr == NULL) 6490 return (-30); 6491 chunks = (struct sctp_auth_chunk_list *)phdr; 6492 num_chunks = plen - sizeof(*chunks); 6493 if (stcb->asoc.peer_auth_chunks != NULL) 6494 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6495 else 6496 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6497 for (i = 0; i < num_chunks; i++) { 6498 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6499 stcb->asoc.peer_auth_chunks); 6500 /* record asconf/asconf-ack if listed */ 6501 if (chunks->chunk_types[i] == SCTP_ASCONF) 6502 saw_asconf = 1; 6503 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6504 saw_asconf_ack = 1; 6505 6506 } 6507 got_chklist = 1; 6508 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6509 (ptype == SCTP_STATE_COOKIE) || 6510 (ptype == SCTP_UNRECOG_PARAM) || 6511 (ptype == SCTP_COOKIE_PRESERVE) || 6512 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6513 (ptype == SCTP_ADD_IP_ADDRESS) || 6514 (ptype == SCTP_DEL_IP_ADDRESS) || 6515 (ptype == SCTP_ERROR_CAUSE_IND) || 6516 (ptype == SCTP_SUCCESS_REPORT)) { 6517 /* don't care */ ; 6518 } else { 6519 if ((ptype & 0x8000) == 0x0000) { 6520 /* 6521 * must stop processing the rest of the 6522 * param's. Any report bits were handled 6523 * with the call to 6524 * sctp_arethere_unrecognized_parameters() 6525 * when the INIT or INIT-ACK was first seen. 6526 */ 6527 break; 6528 } 6529 } 6530 6531 next_param: 6532 offset += SCTP_SIZE32(plen); 6533 if (offset >= limit) { 6534 break; 6535 } 6536 phdr = sctp_get_next_param(m, offset, &parm_buf, 6537 sizeof(parm_buf)); 6538 } 6539 /* Now check to see if we need to purge any addresses */ 6540 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6541 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6542 SCTP_ADDR_NOT_IN_ASSOC) { 6543 /* This address has been removed from the asoc */ 6544 /* remove and free it */ 6545 stcb->asoc.numnets--; 6546 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6547 sctp_free_remote_addr(net); 6548 if (net == stcb->asoc.primary_destination) { 6549 stcb->asoc.primary_destination = NULL; 6550 sctp_select_primary_destination(stcb); 6551 } 6552 } 6553 } 6554 if (ecn_allowed == 0) { 6555 stcb->asoc.ecn_allowed = 0; 6556 } 6557 /* validate authentication required parameters */ 6558 if (got_random && got_hmacs) { 6559 stcb->asoc.peer_supports_auth = 1; 6560 } else { 6561 stcb->asoc.peer_supports_auth = 0; 6562 } 6563 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6564 /* peer does not support auth but sent a chunks list? */ 6565 return (-31); 6566 } 6567 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6568 !stcb->asoc.peer_supports_auth) { 6569 /* peer supports asconf but not auth? */ 6570 return (-32); 6571 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6572 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6573 return (-33); 6574 } 6575 /* concatenate the full random key */ 6576 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6577 if (chunks != NULL) { 6578 keylen += sizeof(*chunks) + num_chunks; 6579 } 6580 new_key = sctp_alloc_key(keylen); 6581 if (new_key != NULL) { 6582 /* copy in the RANDOM */ 6583 if (p_random != NULL) { 6584 keylen = sizeof(*p_random) + random_len; 6585 bcopy(p_random, new_key->key, keylen); 6586 } 6587 /* append in the AUTH chunks */ 6588 if (chunks != NULL) { 6589 bcopy(chunks, new_key->key + keylen, 6590 sizeof(*chunks) + num_chunks); 6591 keylen += sizeof(*chunks) + num_chunks; 6592 } 6593 /* append in the HMACs */ 6594 if (hmacs != NULL) { 6595 bcopy(hmacs, new_key->key + keylen, 6596 sizeof(*hmacs) + hmacs_len); 6597 } 6598 } else { 6599 /* failed to get memory for the key */ 6600 return (-34); 6601 } 6602 if (stcb->asoc.authinfo.peer_random != NULL) 6603 sctp_free_key(stcb->asoc.authinfo.peer_random); 6604 stcb->asoc.authinfo.peer_random = new_key; 6605 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6606 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6607 6608 return (0); 6609 } 6610 6611 int 6612 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6613 struct sctp_nets *net) 6614 { 6615 /* make sure the requested primary address exists in the assoc */ 6616 if (net == NULL && sa) 6617 net = sctp_findnet(stcb, sa); 6618 6619 if (net == NULL) { 6620 /* didn't find the requested primary address! */ 6621 return (-1); 6622 } else { 6623 /* set the primary address */ 6624 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6625 /* Must be confirmed, so queue to set */ 6626 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6627 return (0); 6628 } 6629 stcb->asoc.primary_destination = net; 6630 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6631 sctp_free_remote_addr(stcb->asoc.alternate); 6632 stcb->asoc.alternate = NULL; 6633 } 6634 net = TAILQ_FIRST(&stcb->asoc.nets); 6635 if (net != stcb->asoc.primary_destination) { 6636 /* 6637 * first one on the list is NOT the primary 6638 * sctp_cmpaddr() is much more efficient if the 6639 * primary is the first on the list, make it so. 6640 */ 6641 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6642 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6643 } 6644 return (0); 6645 } 6646 } 6647 6648 int 6649 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6650 { 6651 /* 6652 * This function serves two purposes. It will see if a TAG can be 6653 * re-used and return 1 for yes it is ok and 0 for don't use that 6654 * tag. A secondary function it will do is purge out old tags that 6655 * can be removed. 6656 */ 6657 struct sctpvtaghead *chain; 6658 struct sctp_tagblock *twait_block; 6659 struct sctpasochead *head; 6660 struct sctp_tcb *stcb; 6661 int i; 6662 6663 SCTP_INP_INFO_RLOCK(); 6664 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6665 SCTP_BASE_INFO(hashasocmark))]; 6666 if (head == NULL) { 6667 /* invalid vtag */ 6668 goto skip_vtag_check; 6669 } 6670 LIST_FOREACH(stcb, head, sctp_asocs) { 6671 /* 6672 * We choose not to lock anything here. TCB's can't be 6673 * removed since we have the read lock, so they can't be 6674 * freed on us, same thing for the INP. I may be wrong with 6675 * this assumption, but we will go with it for now :-) 6676 */ 6677 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6678 continue; 6679 } 6680 if (stcb->asoc.my_vtag == tag) { 6681 /* candidate */ 6682 if (stcb->rport != rport) { 6683 continue; 6684 } 6685 if (stcb->sctp_ep->sctp_lport != lport) { 6686 continue; 6687 } 6688 /* Its a used tag set */ 6689 SCTP_INP_INFO_RUNLOCK(); 6690 return (0); 6691 } 6692 } 6693 skip_vtag_check: 6694 6695 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6696 /* Now what about timed wait ? */ 6697 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6698 /* 6699 * Block(s) are present, lets see if we have this tag in the 6700 * list 6701 */ 6702 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6703 if (twait_block->vtag_block[i].v_tag == 0) { 6704 /* not used */ 6705 continue; 6706 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6707 now->tv_sec) { 6708 /* Audit expires this guy */ 6709 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6710 twait_block->vtag_block[i].v_tag = 0; 6711 twait_block->vtag_block[i].lport = 0; 6712 twait_block->vtag_block[i].rport = 0; 6713 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6714 (twait_block->vtag_block[i].lport == lport) && 6715 (twait_block->vtag_block[i].rport == rport)) { 6716 /* Bad tag, sorry :< */ 6717 SCTP_INP_INFO_RUNLOCK(); 6718 return (0); 6719 } 6720 } 6721 } 6722 SCTP_INP_INFO_RUNLOCK(); 6723 return (1); 6724 } 6725 6726 static void 6727 sctp_drain_mbufs(struct sctp_tcb *stcb) 6728 { 6729 /* 6730 * We must hunt this association for MBUF's past the cumack (i.e. 6731 * out of order data that we can renege on). 6732 */ 6733 struct sctp_association *asoc; 6734 struct sctp_tmit_chunk *chk, *nchk; 6735 uint32_t cumulative_tsn_p1; 6736 struct sctp_queued_to_read *ctl, *nctl; 6737 int cnt, strmat; 6738 uint32_t gap, i; 6739 int fnd = 0; 6740 6741 /* We look for anything larger than the cum-ack + 1 */ 6742 6743 asoc = &stcb->asoc; 6744 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6745 /* none we can reneg on. */ 6746 return; 6747 } 6748 SCTP_STAT_INCR(sctps_protocol_drains_done); 6749 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6750 cnt = 0; 6751 /* First look in the re-assembly queue */ 6752 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6753 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6754 /* Yep it is above cum-ack */ 6755 cnt++; 6756 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6757 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6758 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6759 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6760 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6761 if (chk->data) { 6762 sctp_m_freem(chk->data); 6763 chk->data = NULL; 6764 } 6765 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6766 } 6767 } 6768 /* Ok that was fun, now we will drain all the inbound streams? */ 6769 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6770 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6771 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6772 /* Yep it is above cum-ack */ 6773 cnt++; 6774 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6775 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6776 sctp_ucount_decr(asoc->cnt_on_all_streams); 6777 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6778 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6779 if (ctl->data) { 6780 sctp_m_freem(ctl->data); 6781 ctl->data = NULL; 6782 } 6783 sctp_free_remote_addr(ctl->whoFrom); 6784 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6785 SCTP_DECR_READQ_COUNT(); 6786 } 6787 } 6788 } 6789 if (cnt) { 6790 /* We must back down to see what the new highest is */ 6791 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6792 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6793 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6794 asoc->highest_tsn_inside_map = i; 6795 fnd = 1; 6796 break; 6797 } 6798 } 6799 if (!fnd) { 6800 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6801 } 6802 /* 6803 * Question, should we go through the delivery queue? The 6804 * only reason things are on here is the app not reading OR 6805 * a p-d-api up. An attacker COULD send enough in to 6806 * initiate the PD-API and then send a bunch of stuff to 6807 * other streams... these would wind up on the delivery 6808 * queue.. and then we would not get to them. But in order 6809 * to do this I then have to back-track and un-deliver 6810 * sequence numbers in streams.. el-yucko. I think for now 6811 * we will NOT look at the delivery queue and leave it to be 6812 * something to consider later. An alternative would be to 6813 * abort the P-D-API with a notification and then deliver 6814 * the data.... Or another method might be to keep track of 6815 * how many times the situation occurs and if we see a 6816 * possible attack underway just abort the association. 6817 */ 6818 #ifdef SCTP_DEBUG 6819 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6820 #endif 6821 /* 6822 * Now do we need to find a new 6823 * asoc->highest_tsn_inside_map? 6824 */ 6825 asoc->last_revoke_count = cnt; 6826 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6827 /* sa_ignore NO_NULL_CHK */ 6828 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6829 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6830 } 6831 /* 6832 * Another issue, in un-setting the TSN's in the mapping array we 6833 * DID NOT adjust the highest_tsn marker. This will cause one of 6834 * two things to occur. It may cause us to do extra work in checking 6835 * for our mapping array movement. More importantly it may cause us 6836 * to SACK every datagram. This may not be a bad thing though since 6837 * we will recover once we get our cum-ack above and all this stuff 6838 * we dumped recovered. 6839 */ 6840 } 6841 6842 void 6843 sctp_drain() 6844 { 6845 /* 6846 * We must walk the PCB lists for ALL associations here. The system 6847 * is LOW on MBUF's and needs help. This is where reneging will 6848 * occur. We really hope this does NOT happen! 6849 */ 6850 VNET_ITERATOR_DECL(vnet_iter); 6851 VNET_LIST_RLOCK_NOSLEEP(); 6852 VNET_FOREACH(vnet_iter) { 6853 CURVNET_SET(vnet_iter); 6854 struct sctp_inpcb *inp; 6855 struct sctp_tcb *stcb; 6856 6857 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6858 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6859 #ifdef VIMAGE 6860 continue; 6861 #else 6862 return; 6863 #endif 6864 } 6865 SCTP_INP_INFO_RLOCK(); 6866 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6867 /* For each endpoint */ 6868 SCTP_INP_RLOCK(inp); 6869 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6870 /* For each association */ 6871 SCTP_TCB_LOCK(stcb); 6872 sctp_drain_mbufs(stcb); 6873 SCTP_TCB_UNLOCK(stcb); 6874 } 6875 SCTP_INP_RUNLOCK(inp); 6876 } 6877 SCTP_INP_INFO_RUNLOCK(); 6878 CURVNET_RESTORE(); 6879 } 6880 VNET_LIST_RUNLOCK_NOSLEEP(); 6881 } 6882 6883 /* 6884 * start a new iterator 6885 * iterates through all endpoints and associations based on the pcb_state 6886 * flags and asoc_state. "af" (mandatory) is executed for all matching 6887 * assocs and "ef" (optional) is executed when the iterator completes. 6888 * "inpf" (optional) is executed for each new endpoint as it is being 6889 * iterated through. inpe (optional) is called when the inp completes 6890 * its way through all the stcbs. 6891 */ 6892 int 6893 sctp_initiate_iterator(inp_func inpf, 6894 asoc_func af, 6895 inp_func inpe, 6896 uint32_t pcb_state, 6897 uint32_t pcb_features, 6898 uint32_t asoc_state, 6899 void *argp, 6900 uint32_t argi, 6901 end_func ef, 6902 struct sctp_inpcb *s_inp, 6903 uint8_t chunk_output_off) 6904 { 6905 struct sctp_iterator *it = NULL; 6906 6907 if (af == NULL) { 6908 return (-1); 6909 } 6910 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6911 SCTP_M_ITER); 6912 if (it == NULL) { 6913 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6914 return (ENOMEM); 6915 } 6916 memset(it, 0, sizeof(*it)); 6917 it->function_assoc = af; 6918 it->function_inp = inpf; 6919 if (inpf) 6920 it->done_current_ep = 0; 6921 else 6922 it->done_current_ep = 1; 6923 it->function_atend = ef; 6924 it->pointer = argp; 6925 it->val = argi; 6926 it->pcb_flags = pcb_state; 6927 it->pcb_features = pcb_features; 6928 it->asoc_state = asoc_state; 6929 it->function_inp_end = inpe; 6930 it->no_chunk_output = chunk_output_off; 6931 it->vn = curvnet; 6932 if (s_inp) { 6933 /* Assume lock is held here */ 6934 it->inp = s_inp; 6935 SCTP_INP_INCR_REF(it->inp); 6936 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6937 } else { 6938 SCTP_INP_INFO_RLOCK(); 6939 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6940 if (it->inp) { 6941 SCTP_INP_INCR_REF(it->inp); 6942 } 6943 SCTP_INP_INFO_RUNLOCK(); 6944 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6945 6946 } 6947 SCTP_IPI_ITERATOR_WQ_LOCK(); 6948 6949 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6950 if (sctp_it_ctl.iterator_running == 0) { 6951 sctp_wakeup_iterator(); 6952 } 6953 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6954 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6955 return (0); 6956 } 6957