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