1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/sctp_dtrace_define.h> 49 #include <netinet/udp.h> 50 #ifdef INET6 51 #include <netinet6/ip6_var.h> 52 #endif 53 #include <sys/sched.h> 54 #include <sys/smp.h> 55 #include <sys/unistd.h> 56 57 58 VNET_DEFINE(struct sctp_base_info, system_base_info); 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 79 #endif 80 81 void 82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 83 { 84 /* 85 * We really don't need to lock this, but I will just because it 86 * does not hurt. 87 */ 88 SCTP_INP_INFO_RLOCK(); 89 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 90 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 91 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 92 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 93 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 94 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 95 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 96 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 97 SCTP_INP_INFO_RUNLOCK(); 98 } 99 100 /*- 101 * Addresses are added to VRF's (Virtual Router's). For BSD we 102 * have only the default VRF 0. We maintain a hash list of 103 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 104 * these has a list of addresses. When we add a new address 105 * to a VRF we lookup the ifn/ifn_index, if the ifn does 106 * not exist we create it and add it to the list of IFN's 107 * within the VRF. Once we have the sctp_ifn, we add the 108 * address to the list. So we look something like: 109 * 110 * hash-vrf-table 111 * vrf-> ifn-> ifn -> ifn 112 * vrf | 113 * ... +--ifa-> ifa -> ifa 114 * vrf 115 * 116 * We keep these separate lists since the SCTP subsystem will 117 * point to these from its source address selection nets structure. 118 * When an address is deleted it does not happen right away on 119 * the SCTP side, it gets scheduled. What we do when a 120 * delete happens is immediately remove the address from 121 * the master list and decrement the refcount. As our 122 * addip iterator works through and frees the src address 123 * selection pointing to the sctp_ifa, eventually the refcount 124 * will reach 0 and we will delete it. Note that it is assumed 125 * that any locking on system level ifn/ifa is done at the 126 * caller of these functions and these routines will only 127 * lock the SCTP structures as they add or delete things. 128 * 129 * Other notes on VRF concepts. 130 * - An endpoint can be in multiple VRF's 131 * - An association lives within a VRF and only one VRF. 132 * - Any incoming packet we can deduce the VRF for by 133 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 134 * - Any downward send call or connect call must supply the 135 * VRF via ancillary data or via some sort of set default 136 * VRF socket option call (again for BSD no brainer since 137 * the VRF is always 0). 138 * - An endpoint may add multiple VRF's to it. 139 * - Listening sockets can accept associations in any 140 * of the VRF's they are in but the assoc will end up 141 * in only one VRF (gotten from the packet or connect/send). 142 * 143 */ 144 145 struct sctp_vrf * 146 sctp_allocate_vrf(int vrf_id) 147 { 148 struct sctp_vrf *vrf = NULL; 149 struct sctp_vrflist *bucket; 150 151 /* First allocate the VRF structure */ 152 vrf = sctp_find_vrf(vrf_id); 153 if (vrf) { 154 /* Already allocated */ 155 return (vrf); 156 } 157 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 158 SCTP_M_VRF); 159 if (vrf == NULL) { 160 /* No memory */ 161 #ifdef INVARIANTS 162 panic("No memory for VRF:%d", vrf_id); 163 #endif 164 return (NULL); 165 } 166 /* setup the VRF */ 167 memset(vrf, 0, sizeof(struct sctp_vrf)); 168 vrf->vrf_id = vrf_id; 169 LIST_INIT(&vrf->ifnlist); 170 vrf->total_ifa_count = 0; 171 vrf->refcount = 0; 172 /* now also setup table ids */ 173 SCTP_INIT_VRF_TABLEID(vrf); 174 /* Init the HASH of addresses */ 175 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 176 &vrf->vrf_addr_hashmark); 177 if (vrf->vrf_addr_hash == NULL) { 178 /* No memory */ 179 #ifdef INVARIANTS 180 panic("No memory for VRF:%d", vrf_id); 181 #endif 182 SCTP_FREE(vrf, SCTP_M_VRF); 183 return (NULL); 184 } 185 /* Add it to the hash table */ 186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 187 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 189 return (vrf); 190 } 191 192 193 struct sctp_ifn * 194 sctp_find_ifn(void *ifn, uint32_t ifn_index) 195 { 196 struct sctp_ifn *sctp_ifnp; 197 struct sctp_ifnlist *hash_ifn_head; 198 199 /* 200 * We assume the lock is held for the addresses if that's wrong 201 * problems could occur :-) 202 */ 203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 205 if (sctp_ifnp->ifn_index == ifn_index) { 206 return (sctp_ifnp); 207 } 208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 209 return (sctp_ifnp); 210 } 211 } 212 return (NULL); 213 } 214 215 216 struct sctp_vrf * 217 sctp_find_vrf(uint32_t vrf_id) 218 { 219 struct sctp_vrflist *bucket; 220 struct sctp_vrf *liste; 221 222 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 223 LIST_FOREACH(liste, bucket, next_vrf) { 224 if (vrf_id == liste->vrf_id) { 225 return (liste); 226 } 227 } 228 return (NULL); 229 } 230 231 232 void 233 sctp_free_vrf(struct sctp_vrf *vrf) 234 { 235 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 236 if (vrf->vrf_addr_hash) { 237 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 238 vrf->vrf_addr_hash = NULL; 239 } 240 /* We zero'd the count */ 241 LIST_REMOVE(vrf, next_vrf); 242 SCTP_FREE(vrf, SCTP_M_VRF); 243 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 244 } 245 } 246 247 248 void 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 250 { 251 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 252 /* We zero'd the count */ 253 if (sctp_ifnp->vrf) { 254 sctp_free_vrf(sctp_ifnp->vrf); 255 } 256 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 257 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 258 } 259 } 260 261 262 void 263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 264 { 265 struct sctp_ifn *sctp_ifnp; 266 267 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 268 if (sctp_ifnp != NULL) { 269 sctp_ifnp->ifn_mtu = mtu; 270 } 271 } 272 273 274 void 275 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 276 { 277 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 278 /* We zero'd the count */ 279 if (sctp_ifap->ifn_p) { 280 sctp_free_ifn(sctp_ifap->ifn_p); 281 } 282 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 283 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 284 } 285 } 286 287 288 static void 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 290 { 291 struct sctp_ifn *found; 292 293 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 294 if (found == NULL) { 295 /* Not in the list.. sorry */ 296 return; 297 } 298 if (hold_addr_lock == 0) 299 SCTP_IPI_ADDR_WLOCK(); 300 LIST_REMOVE(sctp_ifnp, next_bucket); 301 LIST_REMOVE(sctp_ifnp, next_ifn); 302 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 303 sctp_ifnp->registered_af); 304 if (hold_addr_lock == 0) 305 SCTP_IPI_ADDR_WUNLOCK(); 306 /* Take away the reference, and possibly free it */ 307 sctp_free_ifn(sctp_ifnp); 308 } 309 310 311 void 312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 313 const char *if_name, uint32_t ifn_index) 314 { 315 struct sctp_vrf *vrf; 316 struct sctp_ifa *sctp_ifap; 317 318 SCTP_IPI_ADDR_RLOCK(); 319 vrf = sctp_find_vrf(vrf_id); 320 if (vrf == NULL) { 321 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 322 goto out; 323 324 } 325 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 326 if (sctp_ifap == NULL) { 327 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 328 goto out; 329 } 330 if (sctp_ifap->ifn_p == NULL) { 331 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 332 goto out; 333 } 334 if (if_name) { 335 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 337 sctp_ifap->ifn_p->ifn_name, if_name); 338 goto out; 339 } 340 } else { 341 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 342 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 343 sctp_ifap->ifn_p->ifn_index, ifn_index); 344 goto out; 345 } 346 } 347 348 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 349 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 350 out: 351 SCTP_IPI_ADDR_RUNLOCK(); 352 } 353 354 355 void 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 357 const char *if_name, uint32_t ifn_index) 358 { 359 struct sctp_vrf *vrf; 360 struct sctp_ifa *sctp_ifap; 361 362 SCTP_IPI_ADDR_RLOCK(); 363 vrf = sctp_find_vrf(vrf_id); 364 if (vrf == NULL) { 365 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 366 goto out; 367 368 } 369 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 370 if (sctp_ifap == NULL) { 371 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 372 goto out; 373 } 374 if (sctp_ifap->ifn_p == NULL) { 375 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 376 goto out; 377 } 378 if (if_name) { 379 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 380 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 381 sctp_ifap->ifn_p->ifn_name, if_name); 382 goto out; 383 } 384 } else { 385 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 386 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 387 sctp_ifap->ifn_p->ifn_index, ifn_index); 388 goto out; 389 } 390 } 391 392 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 393 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 394 out: 395 SCTP_IPI_ADDR_RUNLOCK(); 396 } 397 398 399 /*- 400 * Add an ifa to an ifn. 401 * Register the interface as necessary. 402 * NOTE: ADDR write lock MUST be held. 403 */ 404 static void 405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 406 { 407 int ifa_af; 408 409 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 410 sctp_ifap->ifn_p = sctp_ifnp; 411 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 412 /* update address counts */ 413 sctp_ifnp->ifa_count++; 414 ifa_af = sctp_ifap->address.sa.sa_family; 415 switch (ifa_af) { 416 #ifdef INET 417 case AF_INET: 418 sctp_ifnp->num_v4++; 419 break; 420 #endif 421 #ifdef INET6 422 case AF_INET6: 423 sctp_ifnp->num_v6++; 424 break; 425 #endif 426 default: 427 break; 428 } 429 if (sctp_ifnp->ifa_count == 1) { 430 /* register the new interface */ 431 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 432 sctp_ifnp->registered_af = ifa_af; 433 } 434 } 435 436 437 /*- 438 * Remove an ifa from its ifn. 439 * If no more addresses exist, remove the ifn too. Otherwise, re-register 440 * the interface based on the remaining address families left. 441 * NOTE: ADDR write lock MUST be held. 442 */ 443 static void 444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 445 { 446 LIST_REMOVE(sctp_ifap, next_ifa); 447 if (sctp_ifap->ifn_p) { 448 /* update address counts */ 449 sctp_ifap->ifn_p->ifa_count--; 450 switch (sctp_ifap->address.sa.sa_family) { 451 #ifdef INET 452 case AF_INET: 453 sctp_ifap->ifn_p->num_v4--; 454 break; 455 #endif 456 #ifdef INET6 457 case AF_INET6: 458 sctp_ifap->ifn_p->num_v6--; 459 break; 460 #endif 461 default: 462 break; 463 } 464 465 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 466 /* remove the ifn, possibly freeing it */ 467 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 468 } else { 469 /* re-register address family type, if needed */ 470 if ((sctp_ifap->ifn_p->num_v6 == 0) && 471 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 472 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 473 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 474 sctp_ifap->ifn_p->registered_af = AF_INET; 475 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 476 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 477 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 478 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 479 sctp_ifap->ifn_p->registered_af = AF_INET6; 480 } 481 /* free the ifn refcount */ 482 sctp_free_ifn(sctp_ifap->ifn_p); 483 } 484 sctp_ifap->ifn_p = NULL; 485 } 486 } 487 488 489 struct sctp_ifa * 490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 491 uint32_t ifn_type, const char *if_name, void *ifa, 492 struct sockaddr *addr, uint32_t ifa_flags, 493 int dynamic_add) 494 { 495 struct sctp_vrf *vrf; 496 struct sctp_ifn *sctp_ifnp = NULL; 497 struct sctp_ifa *sctp_ifap = NULL; 498 struct sctp_ifalist *hash_addr_head; 499 struct sctp_ifnlist *hash_ifn_head; 500 uint32_t hash_of_addr; 501 int new_ifn_af = 0; 502 503 #ifdef SCTP_DEBUG 504 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 505 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 506 #endif 507 SCTP_IPI_ADDR_WLOCK(); 508 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 509 if (sctp_ifnp) { 510 vrf = sctp_ifnp->vrf; 511 } else { 512 vrf = sctp_find_vrf(vrf_id); 513 if (vrf == NULL) { 514 vrf = sctp_allocate_vrf(vrf_id); 515 if (vrf == NULL) { 516 SCTP_IPI_ADDR_WUNLOCK(); 517 return (NULL); 518 } 519 } 520 } 521 if (sctp_ifnp == NULL) { 522 /* 523 * build one and add it, can't hold lock until after malloc 524 * done though. 525 */ 526 SCTP_IPI_ADDR_WUNLOCK(); 527 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 528 sizeof(struct sctp_ifn), SCTP_M_IFN); 529 if (sctp_ifnp == NULL) { 530 #ifdef INVARIANTS 531 panic("No memory for IFN"); 532 #endif 533 return (NULL); 534 } 535 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 536 sctp_ifnp->ifn_index = ifn_index; 537 sctp_ifnp->ifn_p = ifn; 538 sctp_ifnp->ifn_type = ifn_type; 539 sctp_ifnp->refcount = 0; 540 sctp_ifnp->vrf = vrf; 541 atomic_add_int(&vrf->refcount, 1); 542 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 543 if (if_name != NULL) { 544 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 545 } else { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 547 } 548 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 549 LIST_INIT(&sctp_ifnp->ifalist); 550 SCTP_IPI_ADDR_WLOCK(); 551 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 552 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 553 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 554 new_ifn_af = 1; 555 } 556 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 557 if (sctp_ifap) { 558 /* Hmm, it already exists? */ 559 if ((sctp_ifap->ifn_p) && 560 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 561 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 562 sctp_ifap->ifn_p->ifn_name, ifn_index, 563 (void *)sctp_ifap); 564 if (new_ifn_af) { 565 /* Remove the created one that we don't want */ 566 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 567 } 568 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 569 /* easy to solve, just switch back to active */ 570 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 571 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 572 sctp_ifap->ifn_p = sctp_ifnp; 573 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 574 } 575 exit_stage_left: 576 SCTP_IPI_ADDR_WUNLOCK(); 577 return (sctp_ifap); 578 } else { 579 if (sctp_ifap->ifn_p) { 580 /* 581 * The last IFN gets the address, remove the 582 * old one 583 */ 584 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 585 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 586 sctp_ifap->ifn_p->ifn_index, if_name, 587 ifn_index); 588 /* remove the address from the old ifn */ 589 sctp_remove_ifa_from_ifn(sctp_ifap); 590 /* move the address over to the new ifn */ 591 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 592 goto exit_stage_left; 593 } else { 594 /* repair ifnp which was NULL ? */ 595 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 596 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 597 (void *)sctp_ifnp, (void *)sctp_ifap); 598 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 599 } 600 goto exit_stage_left; 601 } 602 } 603 SCTP_IPI_ADDR_WUNLOCK(); 604 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 605 if (sctp_ifap == NULL) { 606 #ifdef INVARIANTS 607 panic("No memory for IFA"); 608 #endif 609 return (NULL); 610 } 611 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 612 sctp_ifap->ifn_p = sctp_ifnp; 613 atomic_add_int(&sctp_ifnp->refcount, 1); 614 sctp_ifap->vrf_id = vrf_id; 615 sctp_ifap->ifa = ifa; 616 memcpy(&sctp_ifap->address, addr, addr->sa_len); 617 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 618 sctp_ifap->flags = ifa_flags; 619 /* Set scope */ 620 switch (sctp_ifap->address.sa.sa_family) { 621 #ifdef INET 622 case AF_INET: 623 { 624 struct sockaddr_in *sin; 625 626 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 627 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 628 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 629 sctp_ifap->src_is_loop = 1; 630 } 631 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 632 sctp_ifap->src_is_priv = 1; 633 } 634 sctp_ifnp->num_v4++; 635 if (new_ifn_af) 636 new_ifn_af = AF_INET; 637 break; 638 } 639 #endif 640 #ifdef INET6 641 case AF_INET6: 642 { 643 /* ok to use deprecated addresses? */ 644 struct sockaddr_in6 *sin6; 645 646 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 647 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 648 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 649 sctp_ifap->src_is_loop = 1; 650 } 651 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 652 sctp_ifap->src_is_priv = 1; 653 } 654 sctp_ifnp->num_v6++; 655 if (new_ifn_af) 656 new_ifn_af = AF_INET6; 657 break; 658 } 659 #endif 660 default: 661 new_ifn_af = 0; 662 break; 663 } 664 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 665 666 if ((sctp_ifap->src_is_priv == 0) && 667 (sctp_ifap->src_is_loop == 0)) { 668 sctp_ifap->src_is_glob = 1; 669 } 670 SCTP_IPI_ADDR_WLOCK(); 671 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 672 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 673 sctp_ifap->refcount = 1; 674 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 675 sctp_ifnp->ifa_count++; 676 vrf->total_ifa_count++; 677 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 678 if (new_ifn_af) { 679 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 680 sctp_ifnp->registered_af = new_ifn_af; 681 } 682 SCTP_IPI_ADDR_WUNLOCK(); 683 if (dynamic_add) { 684 /* 685 * Bump up the refcount so that when the timer completes it 686 * will drop back down. 687 */ 688 struct sctp_laddr *wi; 689 690 atomic_add_int(&sctp_ifap->refcount, 1); 691 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 692 if (wi == NULL) { 693 /* 694 * Gak, what can we do? We have lost an address 695 * change can you say HOSED? 696 */ 697 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 698 /* Opps, must decrement the count */ 699 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 700 if_name); 701 return (NULL); 702 } 703 SCTP_INCR_LADDR_COUNT(); 704 bzero(wi, sizeof(*wi)); 705 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 706 wi->ifa = sctp_ifap; 707 wi->action = SCTP_ADD_IP_ADDRESS; 708 709 SCTP_WQ_ADDR_LOCK(); 710 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 711 SCTP_WQ_ADDR_UNLOCK(); 712 713 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 714 (struct sctp_inpcb *)NULL, 715 (struct sctp_tcb *)NULL, 716 (struct sctp_nets *)NULL); 717 } else { 718 /* it's ready for use */ 719 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 720 } 721 return (sctp_ifap); 722 } 723 724 void 725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 726 uint32_t ifn_index, const char *if_name) 727 { 728 struct sctp_vrf *vrf; 729 struct sctp_ifa *sctp_ifap = NULL; 730 731 SCTP_IPI_ADDR_WLOCK(); 732 vrf = sctp_find_vrf(vrf_id); 733 if (vrf == NULL) { 734 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 735 goto out_now; 736 } 737 #ifdef SCTP_DEBUG 738 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 739 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 740 #endif 741 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 742 if (sctp_ifap) { 743 /* Validate the delete */ 744 if (sctp_ifap->ifn_p) { 745 int valid = 0; 746 747 /*- 748 * The name has priority over the ifn_index 749 * if its given. We do this especially for 750 * panda who might recycle indexes fast. 751 */ 752 if (if_name) { 753 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 754 /* They match its a correct delete */ 755 valid = 1; 756 } 757 } 758 if (!valid) { 759 /* last ditch check ifn_index */ 760 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 761 valid = 1; 762 } 763 } 764 if (!valid) { 765 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 766 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 768 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 769 SCTP_IPI_ADDR_WUNLOCK(); 770 return; 771 } 772 } 773 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 774 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 775 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 776 vrf->total_ifa_count--; 777 LIST_REMOVE(sctp_ifap, next_bucket); 778 sctp_remove_ifa_from_ifn(sctp_ifap); 779 } 780 #ifdef SCTP_DEBUG 781 else { 782 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 783 ifn_index); 784 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 785 } 786 #endif 787 788 out_now: 789 SCTP_IPI_ADDR_WUNLOCK(); 790 if (sctp_ifap) { 791 struct sctp_laddr *wi; 792 793 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 794 if (wi == NULL) { 795 /* 796 * Gak, what can we do? We have lost an address 797 * change can you say HOSED? 798 */ 799 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 800 801 /* Oops, must decrement the count */ 802 sctp_free_ifa(sctp_ifap); 803 return; 804 } 805 SCTP_INCR_LADDR_COUNT(); 806 bzero(wi, sizeof(*wi)); 807 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 808 wi->ifa = sctp_ifap; 809 wi->action = SCTP_DEL_IP_ADDRESS; 810 SCTP_WQ_ADDR_LOCK(); 811 /* 812 * Should this really be a tailq? As it is we will process 813 * the newest first :-0 814 */ 815 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 816 SCTP_WQ_ADDR_UNLOCK(); 817 818 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 819 (struct sctp_inpcb *)NULL, 820 (struct sctp_tcb *)NULL, 821 (struct sctp_nets *)NULL); 822 } 823 return; 824 } 825 826 827 static int 828 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 829 { 830 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 831 int ipv4_addr_legal, ipv6_addr_legal; 832 struct sctp_vrf *vrf; 833 struct sctp_ifn *sctp_ifn; 834 struct sctp_ifa *sctp_ifa; 835 836 loopback_scope = stcb->asoc.scope.loopback_scope; 837 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 838 local_scope = stcb->asoc.scope.local_scope; 839 site_scope = stcb->asoc.scope.site_scope; 840 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 841 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 842 843 SCTP_IPI_ADDR_RLOCK(); 844 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 845 if (vrf == NULL) { 846 /* no vrf, no addresses */ 847 SCTP_IPI_ADDR_RUNLOCK(); 848 return (0); 849 } 850 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 851 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 852 if ((loopback_scope == 0) && 853 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 854 continue; 855 } 856 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 857 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 858 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 859 /* 860 * We allow pending addresses, where 861 * we have sent an asconf-add to be 862 * considered valid. 863 */ 864 continue; 865 } 866 switch (sctp_ifa->address.sa.sa_family) { 867 #ifdef INET 868 case AF_INET: 869 if (ipv4_addr_legal) { 870 struct sockaddr_in *sin, 871 *rsin; 872 873 sin = &sctp_ifa->address.sin; 874 rsin = (struct sockaddr_in *)to; 875 if ((ipv4_local_scope == 0) && 876 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 877 continue; 878 } 879 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 880 SCTP_IPI_ADDR_RUNLOCK(); 881 return (1); 882 } 883 } 884 break; 885 #endif 886 #ifdef INET6 887 case AF_INET6: 888 if (ipv6_addr_legal) { 889 struct sockaddr_in6 *sin6, 890 *rsin6; 891 892 sin6 = &sctp_ifa->address.sin6; 893 rsin6 = (struct sockaddr_in6 *)to; 894 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 895 if (local_scope == 0) 896 continue; 897 if (sin6->sin6_scope_id == 0) { 898 if (sa6_recoverscope(sin6) != 0) 899 continue; 900 } 901 } 902 if ((site_scope == 0) && 903 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 904 continue; 905 } 906 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 907 SCTP_IPI_ADDR_RUNLOCK(); 908 return (1); 909 } 910 } 911 break; 912 #endif 913 default: 914 /* TSNH */ 915 break; 916 } 917 } 918 } 919 } else { 920 struct sctp_laddr *laddr; 921 922 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 923 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 924 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 925 continue; 926 } 927 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 928 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 929 /* 930 * We allow pending addresses, where we have 931 * sent an asconf-add to be considered 932 * valid. 933 */ 934 continue; 935 } 936 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 937 continue; 938 } 939 switch (to->sa_family) { 940 #ifdef INET 941 case AF_INET: 942 { 943 struct sockaddr_in *sin, *rsin; 944 945 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 946 rsin = (struct sockaddr_in *)to; 947 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 948 SCTP_IPI_ADDR_RUNLOCK(); 949 return (1); 950 } 951 break; 952 } 953 #endif 954 #ifdef INET6 955 case AF_INET6: 956 { 957 struct sockaddr_in6 *sin6, *rsin6; 958 959 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 960 rsin6 = (struct sockaddr_in6 *)to; 961 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 962 SCTP_IPI_ADDR_RUNLOCK(); 963 return (1); 964 } 965 break; 966 } 967 968 #endif 969 default: 970 /* TSNH */ 971 break; 972 } 973 974 } 975 } 976 SCTP_IPI_ADDR_RUNLOCK(); 977 return (0); 978 } 979 980 981 static struct sctp_tcb * 982 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 983 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 984 { 985 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 986 /* 987 * If we support the TCP model, then we must now dig through to see 988 * if we can find our endpoint in the list of tcp ep's. 989 */ 990 uint16_t lport, rport; 991 struct sctppcbhead *ephead; 992 struct sctp_inpcb *inp; 993 struct sctp_laddr *laddr; 994 struct sctp_tcb *stcb; 995 struct sctp_nets *net; 996 997 if ((to == NULL) || (from == NULL)) { 998 return (NULL); 999 } 1000 switch (to->sa_family) { 1001 #ifdef INET 1002 case AF_INET: 1003 if (from->sa_family == AF_INET) { 1004 lport = ((struct sockaddr_in *)to)->sin_port; 1005 rport = ((struct sockaddr_in *)from)->sin_port; 1006 } else { 1007 return (NULL); 1008 } 1009 break; 1010 #endif 1011 #ifdef INET6 1012 case AF_INET6: 1013 if (from->sa_family == AF_INET6) { 1014 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1015 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1016 } else { 1017 return (NULL); 1018 } 1019 break; 1020 #endif 1021 default: 1022 return (NULL); 1023 } 1024 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1025 /* 1026 * Ok now for each of the guys in this bucket we must look and see: 1027 * - Does the remote port match. - Does there single association's 1028 * addresses match this address (to). If so we update p_ep to point 1029 * to this ep and return the tcb from it. 1030 */ 1031 LIST_FOREACH(inp, ephead, sctp_hash) { 1032 SCTP_INP_RLOCK(inp); 1033 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1034 SCTP_INP_RUNLOCK(inp); 1035 continue; 1036 } 1037 if (lport != inp->sctp_lport) { 1038 SCTP_INP_RUNLOCK(inp); 1039 continue; 1040 } 1041 if (inp->def_vrf_id != vrf_id) { 1042 SCTP_INP_RUNLOCK(inp); 1043 continue; 1044 } 1045 /* check to see if the ep has one of the addresses */ 1046 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1047 /* We are NOT bound all, so look further */ 1048 int match = 0; 1049 1050 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1051 1052 if (laddr->ifa == NULL) { 1053 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 1054 continue; 1055 } 1056 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1057 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1058 continue; 1059 } 1060 if (laddr->ifa->address.sa.sa_family == 1061 to->sa_family) { 1062 /* see if it matches */ 1063 #ifdef INET 1064 if (from->sa_family == AF_INET) { 1065 struct sockaddr_in *intf_addr, 1066 *sin; 1067 1068 intf_addr = &laddr->ifa->address.sin; 1069 sin = (struct sockaddr_in *)to; 1070 if (sin->sin_addr.s_addr == 1071 intf_addr->sin_addr.s_addr) { 1072 match = 1; 1073 break; 1074 } 1075 } 1076 #endif 1077 #ifdef INET6 1078 if (from->sa_family == AF_INET6) { 1079 struct sockaddr_in6 *intf_addr6; 1080 struct sockaddr_in6 *sin6; 1081 1082 sin6 = (struct sockaddr_in6 *) 1083 to; 1084 intf_addr6 = &laddr->ifa->address.sin6; 1085 1086 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1087 intf_addr6)) { 1088 match = 1; 1089 break; 1090 } 1091 } 1092 #endif 1093 } 1094 } 1095 if (match == 0) { 1096 /* This endpoint does not have this address */ 1097 SCTP_INP_RUNLOCK(inp); 1098 continue; 1099 } 1100 } 1101 /* 1102 * Ok if we hit here the ep has the address, does it hold 1103 * the tcb? 1104 */ 1105 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1106 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1107 if (stcb == NULL) { 1108 SCTP_INP_RUNLOCK(inp); 1109 continue; 1110 } 1111 SCTP_TCB_LOCK(stcb); 1112 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1113 SCTP_TCB_UNLOCK(stcb); 1114 SCTP_INP_RUNLOCK(inp); 1115 continue; 1116 } 1117 if (stcb->rport != rport) { 1118 /* remote port does not match. */ 1119 SCTP_TCB_UNLOCK(stcb); 1120 SCTP_INP_RUNLOCK(inp); 1121 continue; 1122 } 1123 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1124 SCTP_TCB_UNLOCK(stcb); 1125 SCTP_INP_RUNLOCK(inp); 1126 continue; 1127 } 1128 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1129 SCTP_TCB_UNLOCK(stcb); 1130 SCTP_INP_RUNLOCK(inp); 1131 continue; 1132 } 1133 /* Does this TCB have a matching address? */ 1134 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1135 1136 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1137 /* not the same family, can't be a match */ 1138 continue; 1139 } 1140 switch (from->sa_family) { 1141 #ifdef INET 1142 case AF_INET: 1143 { 1144 struct sockaddr_in *sin, *rsin; 1145 1146 sin = (struct sockaddr_in *)&net->ro._l_addr; 1147 rsin = (struct sockaddr_in *)from; 1148 if (sin->sin_addr.s_addr == 1149 rsin->sin_addr.s_addr) { 1150 /* found it */ 1151 if (netp != NULL) { 1152 *netp = net; 1153 } 1154 /* 1155 * Update the endpoint 1156 * pointer 1157 */ 1158 *inp_p = inp; 1159 SCTP_INP_RUNLOCK(inp); 1160 return (stcb); 1161 } 1162 break; 1163 } 1164 #endif 1165 #ifdef INET6 1166 case AF_INET6: 1167 { 1168 struct sockaddr_in6 *sin6, *rsin6; 1169 1170 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1171 rsin6 = (struct sockaddr_in6 *)from; 1172 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1173 rsin6)) { 1174 /* found it */ 1175 if (netp != NULL) { 1176 *netp = net; 1177 } 1178 /* 1179 * Update the endpoint 1180 * pointer 1181 */ 1182 *inp_p = inp; 1183 SCTP_INP_RUNLOCK(inp); 1184 return (stcb); 1185 } 1186 break; 1187 } 1188 #endif 1189 default: 1190 /* TSNH */ 1191 break; 1192 } 1193 } 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 } 1197 return (NULL); 1198 } 1199 1200 1201 /* 1202 * rules for use 1203 * 1204 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1205 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1206 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1207 * NULL. 1208 */ 1209 1210 struct sctp_tcb * 1211 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1212 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1213 { 1214 struct sctpasochead *head; 1215 struct sctp_inpcb *inp; 1216 struct sctp_tcb *stcb = NULL; 1217 struct sctp_nets *net; 1218 uint16_t rport; 1219 1220 inp = *inp_p; 1221 switch (remote->sa_family) { 1222 #ifdef INET 1223 case AF_INET: 1224 rport = (((struct sockaddr_in *)remote)->sin_port); 1225 break; 1226 #endif 1227 #ifdef INET6 1228 case AF_INET6: 1229 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1230 break; 1231 #endif 1232 default: 1233 return (NULL); 1234 } 1235 if (locked_tcb) { 1236 /* 1237 * UN-lock so we can do proper locking here this occurs when 1238 * called from load_addresses_from_init. 1239 */ 1240 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1241 SCTP_TCB_UNLOCK(locked_tcb); 1242 } 1243 SCTP_INP_INFO_RLOCK(); 1244 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1245 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1246 /*- 1247 * Now either this guy is our listener or it's the 1248 * connector. If it is the one that issued the connect, then 1249 * it's only chance is to be the first TCB in the list. If 1250 * it is the acceptor, then do the special_lookup to hash 1251 * and find the real inp. 1252 */ 1253 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1254 /* to is peer addr, from is my addr */ 1255 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1256 netp, inp->def_vrf_id); 1257 if ((stcb != NULL) && (locked_tcb == NULL)) { 1258 /* we have a locked tcb, lower refcount */ 1259 SCTP_INP_DECR_REF(inp); 1260 } 1261 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1262 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1263 SCTP_TCB_LOCK(locked_tcb); 1264 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1265 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1266 } 1267 SCTP_INP_INFO_RUNLOCK(); 1268 return (stcb); 1269 } else { 1270 SCTP_INP_WLOCK(inp); 1271 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1272 goto null_return; 1273 } 1274 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1275 if (stcb == NULL) { 1276 goto null_return; 1277 } 1278 SCTP_TCB_LOCK(stcb); 1279 1280 if (stcb->rport != rport) { 1281 /* remote port does not match. */ 1282 SCTP_TCB_UNLOCK(stcb); 1283 goto null_return; 1284 } 1285 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1286 SCTP_TCB_UNLOCK(stcb); 1287 goto null_return; 1288 } 1289 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1290 SCTP_TCB_UNLOCK(stcb); 1291 goto null_return; 1292 } 1293 /* now look at the list of remote addresses */ 1294 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1295 #ifdef INVARIANTS 1296 if (net == (TAILQ_NEXT(net, sctp_next))) { 1297 panic("Corrupt net list"); 1298 } 1299 #endif 1300 if (net->ro._l_addr.sa.sa_family != 1301 remote->sa_family) { 1302 /* not the same family */ 1303 continue; 1304 } 1305 switch (remote->sa_family) { 1306 #ifdef INET 1307 case AF_INET: 1308 { 1309 struct sockaddr_in *sin, 1310 *rsin; 1311 1312 sin = (struct sockaddr_in *) 1313 &net->ro._l_addr; 1314 rsin = (struct sockaddr_in *)remote; 1315 if (sin->sin_addr.s_addr == 1316 rsin->sin_addr.s_addr) { 1317 /* found it */ 1318 if (netp != NULL) { 1319 *netp = net; 1320 } 1321 if (locked_tcb == NULL) { 1322 SCTP_INP_DECR_REF(inp); 1323 } else if (locked_tcb != stcb) { 1324 SCTP_TCB_LOCK(locked_tcb); 1325 } 1326 if (locked_tcb) { 1327 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1328 } 1329 SCTP_INP_WUNLOCK(inp); 1330 SCTP_INP_INFO_RUNLOCK(); 1331 return (stcb); 1332 } 1333 break; 1334 } 1335 #endif 1336 #ifdef INET6 1337 case AF_INET6: 1338 { 1339 struct sockaddr_in6 *sin6, 1340 *rsin6; 1341 1342 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1343 rsin6 = (struct sockaddr_in6 *)remote; 1344 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1345 rsin6)) { 1346 /* found it */ 1347 if (netp != NULL) { 1348 *netp = net; 1349 } 1350 if (locked_tcb == NULL) { 1351 SCTP_INP_DECR_REF(inp); 1352 } else if (locked_tcb != stcb) { 1353 SCTP_TCB_LOCK(locked_tcb); 1354 } 1355 if (locked_tcb) { 1356 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1357 } 1358 SCTP_INP_WUNLOCK(inp); 1359 SCTP_INP_INFO_RUNLOCK(); 1360 return (stcb); 1361 } 1362 break; 1363 } 1364 #endif 1365 default: 1366 /* TSNH */ 1367 break; 1368 } 1369 } 1370 SCTP_TCB_UNLOCK(stcb); 1371 } 1372 } else { 1373 SCTP_INP_WLOCK(inp); 1374 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1375 goto null_return; 1376 } 1377 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1378 inp->sctp_hashmark)]; 1379 if (head == NULL) { 1380 goto null_return; 1381 } 1382 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1383 if (stcb->rport != rport) { 1384 /* remote port does not match */ 1385 continue; 1386 } 1387 SCTP_TCB_LOCK(stcb); 1388 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1389 SCTP_TCB_UNLOCK(stcb); 1390 continue; 1391 } 1392 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1393 SCTP_TCB_UNLOCK(stcb); 1394 continue; 1395 } 1396 /* now look at the list of remote addresses */ 1397 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1398 #ifdef INVARIANTS 1399 if (net == (TAILQ_NEXT(net, sctp_next))) { 1400 panic("Corrupt net list"); 1401 } 1402 #endif 1403 if (net->ro._l_addr.sa.sa_family != 1404 remote->sa_family) { 1405 /* not the same family */ 1406 continue; 1407 } 1408 switch (remote->sa_family) { 1409 #ifdef INET 1410 case AF_INET: 1411 { 1412 struct sockaddr_in *sin, 1413 *rsin; 1414 1415 sin = (struct sockaddr_in *) 1416 &net->ro._l_addr; 1417 rsin = (struct sockaddr_in *)remote; 1418 if (sin->sin_addr.s_addr == 1419 rsin->sin_addr.s_addr) { 1420 /* found it */ 1421 if (netp != NULL) { 1422 *netp = net; 1423 } 1424 if (locked_tcb == NULL) { 1425 SCTP_INP_DECR_REF(inp); 1426 } else if (locked_tcb != stcb) { 1427 SCTP_TCB_LOCK(locked_tcb); 1428 } 1429 if (locked_tcb) { 1430 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1431 } 1432 SCTP_INP_WUNLOCK(inp); 1433 SCTP_INP_INFO_RUNLOCK(); 1434 return (stcb); 1435 } 1436 break; 1437 } 1438 #endif 1439 #ifdef INET6 1440 case AF_INET6: 1441 { 1442 struct sockaddr_in6 *sin6, 1443 *rsin6; 1444 1445 sin6 = (struct sockaddr_in6 *) 1446 &net->ro._l_addr; 1447 rsin6 = (struct sockaddr_in6 *)remote; 1448 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1449 rsin6)) { 1450 /* found it */ 1451 if (netp != NULL) { 1452 *netp = net; 1453 } 1454 if (locked_tcb == NULL) { 1455 SCTP_INP_DECR_REF(inp); 1456 } else if (locked_tcb != stcb) { 1457 SCTP_TCB_LOCK(locked_tcb); 1458 } 1459 if (locked_tcb) { 1460 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1461 } 1462 SCTP_INP_WUNLOCK(inp); 1463 SCTP_INP_INFO_RUNLOCK(); 1464 return (stcb); 1465 } 1466 break; 1467 } 1468 #endif 1469 default: 1470 /* TSNH */ 1471 break; 1472 } 1473 } 1474 SCTP_TCB_UNLOCK(stcb); 1475 } 1476 } 1477 null_return: 1478 /* clean up for returning null */ 1479 if (locked_tcb) { 1480 SCTP_TCB_LOCK(locked_tcb); 1481 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1482 } 1483 SCTP_INP_WUNLOCK(inp); 1484 SCTP_INP_INFO_RUNLOCK(); 1485 /* not found */ 1486 return (NULL); 1487 } 1488 1489 1490 /* 1491 * Find an association for a specific endpoint using the association id given 1492 * out in the COMM_UP notification 1493 */ 1494 struct sctp_tcb * 1495 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1496 { 1497 /* 1498 * Use my the assoc_id to find a endpoint 1499 */ 1500 struct sctpasochead *head; 1501 struct sctp_tcb *stcb; 1502 uint32_t id; 1503 1504 if (inp == NULL) { 1505 SCTP_PRINTF("TSNH ep_associd\n"); 1506 return (NULL); 1507 } 1508 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1509 SCTP_PRINTF("TSNH ep_associd0\n"); 1510 return (NULL); 1511 } 1512 id = (uint32_t) asoc_id; 1513 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1514 if (head == NULL) { 1515 /* invalid id TSNH */ 1516 SCTP_PRINTF("TSNH ep_associd1\n"); 1517 return (NULL); 1518 } 1519 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1520 if (stcb->asoc.assoc_id == id) { 1521 if (inp != stcb->sctp_ep) { 1522 /* 1523 * some other guy has the same id active (id 1524 * collision ??). 1525 */ 1526 SCTP_PRINTF("TSNH ep_associd2\n"); 1527 continue; 1528 } 1529 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1530 continue; 1531 } 1532 if (want_lock) { 1533 SCTP_TCB_LOCK(stcb); 1534 } 1535 return (stcb); 1536 } 1537 } 1538 return (NULL); 1539 } 1540 1541 1542 struct sctp_tcb * 1543 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1544 { 1545 struct sctp_tcb *stcb; 1546 1547 SCTP_INP_RLOCK(inp); 1548 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1549 SCTP_INP_RUNLOCK(inp); 1550 return (stcb); 1551 } 1552 1553 1554 /* 1555 * Endpoint probe expects that the INP_INFO is locked. 1556 */ 1557 static struct sctp_inpcb * 1558 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1559 uint16_t lport, uint32_t vrf_id) 1560 { 1561 struct sctp_inpcb *inp; 1562 struct sctp_laddr *laddr; 1563 1564 #ifdef INET 1565 struct sockaddr_in *sin; 1566 1567 #endif 1568 #ifdef INET6 1569 struct sockaddr_in6 *sin6; 1570 struct sockaddr_in6 *intf_addr6; 1571 1572 #endif 1573 int fnd; 1574 1575 #ifdef INET 1576 sin = NULL; 1577 #endif 1578 #ifdef INET6 1579 sin6 = NULL; 1580 #endif 1581 switch (nam->sa_family) { 1582 #ifdef INET 1583 case AF_INET: 1584 sin = (struct sockaddr_in *)nam; 1585 break; 1586 #endif 1587 #ifdef INET6 1588 case AF_INET6: 1589 sin6 = (struct sockaddr_in6 *)nam; 1590 break; 1591 #endif 1592 default: 1593 /* unsupported family */ 1594 return (NULL); 1595 } 1596 1597 if (head == NULL) 1598 return (NULL); 1599 1600 LIST_FOREACH(inp, head, sctp_hash) { 1601 SCTP_INP_RLOCK(inp); 1602 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1603 SCTP_INP_RUNLOCK(inp); 1604 continue; 1605 } 1606 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1607 (inp->sctp_lport == lport)) { 1608 /* got it */ 1609 #ifdef INET 1610 if ((nam->sa_family == AF_INET) && 1611 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1612 SCTP_IPV6_V6ONLY(inp)) { 1613 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1614 SCTP_INP_RUNLOCK(inp); 1615 continue; 1616 } 1617 #endif 1618 #ifdef INET6 1619 /* A V6 address and the endpoint is NOT bound V6 */ 1620 if (nam->sa_family == AF_INET6 && 1621 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1622 SCTP_INP_RUNLOCK(inp); 1623 continue; 1624 } 1625 #endif 1626 /* does a VRF id match? */ 1627 fnd = 0; 1628 if (inp->def_vrf_id == vrf_id) 1629 fnd = 1; 1630 1631 SCTP_INP_RUNLOCK(inp); 1632 if (!fnd) 1633 continue; 1634 return (inp); 1635 } 1636 SCTP_INP_RUNLOCK(inp); 1637 } 1638 switch (nam->sa_family) { 1639 #ifdef INET 1640 case AF_INET: 1641 if (sin->sin_addr.s_addr == INADDR_ANY) { 1642 /* Can't hunt for one that has no address specified */ 1643 return (NULL); 1644 } 1645 break; 1646 #endif 1647 #ifdef INET6 1648 case AF_INET6: 1649 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1650 /* Can't hunt for one that has no address specified */ 1651 return (NULL); 1652 } 1653 break; 1654 #endif 1655 default: 1656 break; 1657 } 1658 /* 1659 * ok, not bound to all so see if we can find a EP bound to this 1660 * address. 1661 */ 1662 LIST_FOREACH(inp, head, sctp_hash) { 1663 SCTP_INP_RLOCK(inp); 1664 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1665 SCTP_INP_RUNLOCK(inp); 1666 continue; 1667 } 1668 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1669 SCTP_INP_RUNLOCK(inp); 1670 continue; 1671 } 1672 /* 1673 * Ok this could be a likely candidate, look at all of its 1674 * addresses 1675 */ 1676 if (inp->sctp_lport != lport) { 1677 SCTP_INP_RUNLOCK(inp); 1678 continue; 1679 } 1680 /* does a VRF id match? */ 1681 fnd = 0; 1682 if (inp->def_vrf_id == vrf_id) 1683 fnd = 1; 1684 1685 if (!fnd) { 1686 SCTP_INP_RUNLOCK(inp); 1687 continue; 1688 } 1689 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1690 if (laddr->ifa == NULL) { 1691 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1692 __FUNCTION__); 1693 continue; 1694 } 1695 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1696 (void *)laddr->ifa); 1697 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1698 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1699 continue; 1700 } 1701 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1702 /* possible, see if it matches */ 1703 switch (nam->sa_family) { 1704 #ifdef INET 1705 case AF_INET: 1706 if (sin->sin_addr.s_addr == 1707 laddr->ifa->address.sin.sin_addr.s_addr) { 1708 SCTP_INP_RUNLOCK(inp); 1709 return (inp); 1710 } 1711 break; 1712 #endif 1713 #ifdef INET6 1714 case AF_INET6: 1715 intf_addr6 = &laddr->ifa->address.sin6; 1716 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1717 intf_addr6)) { 1718 SCTP_INP_RUNLOCK(inp); 1719 return (inp); 1720 } 1721 break; 1722 #endif 1723 } 1724 } 1725 } 1726 SCTP_INP_RUNLOCK(inp); 1727 } 1728 return (NULL); 1729 } 1730 1731 1732 static struct sctp_inpcb * 1733 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1734 { 1735 struct sctppcbhead *head; 1736 struct sctp_inpcb *t_inp; 1737 int fnd; 1738 1739 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1740 SCTP_BASE_INFO(hashmark))]; 1741 LIST_FOREACH(t_inp, head, sctp_hash) { 1742 if (t_inp->sctp_lport != lport) { 1743 continue; 1744 } 1745 /* is it in the VRF in question */ 1746 fnd = 0; 1747 if (t_inp->def_vrf_id == vrf_id) 1748 fnd = 1; 1749 if (!fnd) 1750 continue; 1751 1752 /* This one is in use. */ 1753 /* check the v6/v4 binding issue */ 1754 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1755 SCTP_IPV6_V6ONLY(t_inp)) { 1756 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1757 /* collision in V6 space */ 1758 return (t_inp); 1759 } else { 1760 /* inp is BOUND_V4 no conflict */ 1761 continue; 1762 } 1763 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1764 /* t_inp is bound v4 and v6, conflict always */ 1765 return (t_inp); 1766 } else { 1767 /* t_inp is bound only V4 */ 1768 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1769 SCTP_IPV6_V6ONLY(inp)) { 1770 /* no conflict */ 1771 continue; 1772 } 1773 /* else fall through to conflict */ 1774 } 1775 return (t_inp); 1776 } 1777 return (NULL); 1778 } 1779 1780 1781 int 1782 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1783 { 1784 /* For 1-2-1 with port reuse */ 1785 struct sctppcbhead *head; 1786 struct sctp_inpcb *tinp; 1787 1788 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1789 /* only works with port reuse on */ 1790 return (-1); 1791 } 1792 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1793 return (0); 1794 } 1795 SCTP_INP_RUNLOCK(inp); 1796 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1797 SCTP_BASE_INFO(hashmark))]; 1798 /* Kick out all non-listeners to the TCP hash */ 1799 LIST_FOREACH(tinp, head, sctp_hash) { 1800 if (tinp->sctp_lport != inp->sctp_lport) { 1801 continue; 1802 } 1803 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1804 continue; 1805 } 1806 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1807 continue; 1808 } 1809 if (tinp->sctp_socket->so_qlimit) { 1810 continue; 1811 } 1812 SCTP_INP_WLOCK(tinp); 1813 LIST_REMOVE(tinp, sctp_hash); 1814 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1815 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1816 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1817 SCTP_INP_WUNLOCK(tinp); 1818 } 1819 SCTP_INP_WLOCK(inp); 1820 /* Pull from where he was */ 1821 LIST_REMOVE(inp, sctp_hash); 1822 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1823 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1824 LIST_INSERT_HEAD(head, inp, sctp_hash); 1825 SCTP_INP_WUNLOCK(inp); 1826 SCTP_INP_RLOCK(inp); 1827 return (0); 1828 } 1829 1830 1831 struct sctp_inpcb * 1832 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1833 uint32_t vrf_id) 1834 { 1835 /* 1836 * First we check the hash table to see if someone has this port 1837 * bound with just the port. 1838 */ 1839 struct sctp_inpcb *inp; 1840 struct sctppcbhead *head; 1841 int lport; 1842 unsigned int i; 1843 1844 #ifdef INET 1845 struct sockaddr_in *sin; 1846 1847 #endif 1848 #ifdef INET6 1849 struct sockaddr_in6 *sin6; 1850 1851 #endif 1852 1853 switch (nam->sa_family) { 1854 #ifdef INET 1855 case AF_INET: 1856 sin = (struct sockaddr_in *)nam; 1857 lport = sin->sin_port; 1858 break; 1859 #endif 1860 #ifdef INET6 1861 case AF_INET6: 1862 sin6 = (struct sockaddr_in6 *)nam; 1863 lport = sin6->sin6_port; 1864 break; 1865 #endif 1866 default: 1867 return (NULL); 1868 } 1869 /* 1870 * I could cheat here and just cast to one of the types but we will 1871 * do it right. It also provides the check against an Unsupported 1872 * type too. 1873 */ 1874 /* Find the head of the ALLADDR chain */ 1875 if (have_lock == 0) { 1876 SCTP_INP_INFO_RLOCK(); 1877 } 1878 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1879 SCTP_BASE_INFO(hashmark))]; 1880 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1881 1882 /* 1883 * If the TCP model exists it could be that the main listening 1884 * endpoint is gone but there still exists a connected socket for 1885 * this guy. If so we can return the first one that we find. This 1886 * may NOT be the correct one so the caller should be wary on the 1887 * returned INP. Currently the only caller that sets find_tcp_pool 1888 * is in bindx where we are verifying that a user CAN bind the 1889 * address. He either has bound it already, or someone else has, or 1890 * its open to bind, so this is good enough. 1891 */ 1892 if (inp == NULL && find_tcp_pool) { 1893 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1894 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1895 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1896 if (inp) { 1897 break; 1898 } 1899 } 1900 } 1901 if (inp) { 1902 SCTP_INP_INCR_REF(inp); 1903 } 1904 if (have_lock == 0) { 1905 SCTP_INP_INFO_RUNLOCK(); 1906 } 1907 return (inp); 1908 } 1909 1910 1911 /* 1912 * Find an association for an endpoint with the pointer to whom you want to 1913 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1914 * need to change the *to to some other struct like a mbuf... 1915 */ 1916 struct sctp_tcb * 1917 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1918 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1919 uint32_t vrf_id) 1920 { 1921 struct sctp_inpcb *inp = NULL; 1922 struct sctp_tcb *stcb; 1923 1924 SCTP_INP_INFO_RLOCK(); 1925 if (find_tcp_pool) { 1926 if (inp_p != NULL) { 1927 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1928 vrf_id); 1929 } else { 1930 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1931 vrf_id); 1932 } 1933 if (stcb != NULL) { 1934 SCTP_INP_INFO_RUNLOCK(); 1935 return (stcb); 1936 } 1937 } 1938 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1939 if (inp_p != NULL) { 1940 *inp_p = inp; 1941 } 1942 SCTP_INP_INFO_RUNLOCK(); 1943 if (inp == NULL) { 1944 return (NULL); 1945 } 1946 /* 1947 * ok, we have an endpoint, now lets find the assoc for it (if any) 1948 * we now place the source address or from in the to of the find 1949 * endpoint call. Since in reality this chain is used from the 1950 * inbound packet side. 1951 */ 1952 if (inp_p != NULL) { 1953 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1954 NULL); 1955 } else { 1956 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 1957 NULL); 1958 } 1959 return (stcb); 1960 } 1961 1962 1963 /* 1964 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1965 * find all addresses that the sender has specified in any address list. Each 1966 * address will be used to lookup the TCB and see if one exits. 1967 */ 1968 static struct sctp_tcb * 1969 sctp_findassociation_special_addr(struct mbuf *m, int offset, 1970 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1971 struct sockaddr *dst) 1972 { 1973 struct sctp_paramhdr *phdr, parm_buf; 1974 struct sctp_tcb *stcb; 1975 uint32_t ptype, plen; 1976 1977 #ifdef INET 1978 struct sockaddr_in sin4; 1979 1980 #endif 1981 #ifdef INET6 1982 struct sockaddr_in6 sin6; 1983 1984 #endif 1985 1986 #ifdef INET 1987 memset(&sin4, 0, sizeof(sin4)); 1988 sin4.sin_len = sizeof(sin4); 1989 sin4.sin_family = AF_INET; 1990 sin4.sin_port = sh->src_port; 1991 #endif 1992 #ifdef INET6 1993 memset(&sin6, 0, sizeof(sin6)); 1994 sin6.sin6_len = sizeof(sin6); 1995 sin6.sin6_family = AF_INET6; 1996 sin6.sin6_port = sh->src_port; 1997 #endif 1998 1999 stcb = NULL; 2000 offset += sizeof(struct sctp_init_chunk); 2001 2002 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2003 while (phdr != NULL) { 2004 /* now we must see if we want the parameter */ 2005 ptype = ntohs(phdr->param_type); 2006 plen = ntohs(phdr->param_length); 2007 if (plen == 0) { 2008 break; 2009 } 2010 #ifdef INET 2011 if (ptype == SCTP_IPV4_ADDRESS && 2012 plen == sizeof(struct sctp_ipv4addr_param)) { 2013 /* Get the rest of the address */ 2014 struct sctp_ipv4addr_param ip4_parm, *p4; 2015 2016 phdr = sctp_get_next_param(m, offset, 2017 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2018 if (phdr == NULL) { 2019 return (NULL); 2020 } 2021 p4 = (struct sctp_ipv4addr_param *)phdr; 2022 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2023 /* look it up */ 2024 stcb = sctp_findassociation_ep_addr(inp_p, 2025 (struct sockaddr *)&sin4, netp, dst, NULL); 2026 if (stcb != NULL) { 2027 return (stcb); 2028 } 2029 } 2030 #endif 2031 #ifdef INET6 2032 if (ptype == SCTP_IPV6_ADDRESS && 2033 plen == sizeof(struct sctp_ipv6addr_param)) { 2034 /* Get the rest of the address */ 2035 struct sctp_ipv6addr_param ip6_parm, *p6; 2036 2037 phdr = sctp_get_next_param(m, offset, 2038 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2039 if (phdr == NULL) { 2040 return (NULL); 2041 } 2042 p6 = (struct sctp_ipv6addr_param *)phdr; 2043 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2044 /* look it up */ 2045 stcb = sctp_findassociation_ep_addr(inp_p, 2046 (struct sockaddr *)&sin6, netp, dst, NULL); 2047 if (stcb != NULL) { 2048 return (stcb); 2049 } 2050 } 2051 #endif 2052 offset += SCTP_SIZE32(plen); 2053 phdr = sctp_get_next_param(m, offset, &parm_buf, 2054 sizeof(parm_buf)); 2055 } 2056 return (NULL); 2057 } 2058 2059 static struct sctp_tcb * 2060 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2061 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2062 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2063 { 2064 /* 2065 * Use my vtag to hash. If we find it we then verify the source addr 2066 * is in the assoc. If all goes well we save a bit on rec of a 2067 * packet. 2068 */ 2069 struct sctpasochead *head; 2070 struct sctp_nets *net; 2071 struct sctp_tcb *stcb; 2072 2073 SCTP_INP_INFO_RLOCK(); 2074 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2075 SCTP_BASE_INFO(hashasocmark))]; 2076 if (head == NULL) { 2077 /* invalid vtag */ 2078 SCTP_INP_INFO_RUNLOCK(); 2079 return (NULL); 2080 } 2081 LIST_FOREACH(stcb, head, sctp_asocs) { 2082 SCTP_INP_RLOCK(stcb->sctp_ep); 2083 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2084 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2085 continue; 2086 } 2087 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2088 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2089 continue; 2090 } 2091 SCTP_TCB_LOCK(stcb); 2092 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2093 if (stcb->asoc.my_vtag == vtag) { 2094 /* candidate */ 2095 if (stcb->rport != rport) { 2096 SCTP_TCB_UNLOCK(stcb); 2097 continue; 2098 } 2099 if (stcb->sctp_ep->sctp_lport != lport) { 2100 SCTP_TCB_UNLOCK(stcb); 2101 continue; 2102 } 2103 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2104 SCTP_TCB_UNLOCK(stcb); 2105 continue; 2106 } 2107 /* RRS:Need toaddr check here */ 2108 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2109 /* Endpoint does not own this address */ 2110 SCTP_TCB_UNLOCK(stcb); 2111 continue; 2112 } 2113 if (remote_tag) { 2114 /* 2115 * If we have both vtags that's all we match 2116 * on 2117 */ 2118 if (stcb->asoc.peer_vtag == remote_tag) { 2119 /* 2120 * If both tags match we consider it 2121 * conclusive and check NO 2122 * source/destination addresses 2123 */ 2124 goto conclusive; 2125 } 2126 } 2127 if (skip_src_check) { 2128 conclusive: 2129 if (from) { 2130 *netp = sctp_findnet(stcb, from); 2131 } else { 2132 *netp = NULL; /* unknown */ 2133 } 2134 if (inp_p) 2135 *inp_p = stcb->sctp_ep; 2136 SCTP_INP_INFO_RUNLOCK(); 2137 return (stcb); 2138 } 2139 net = sctp_findnet(stcb, from); 2140 if (net) { 2141 /* yep its him. */ 2142 *netp = net; 2143 SCTP_STAT_INCR(sctps_vtagexpress); 2144 *inp_p = stcb->sctp_ep; 2145 SCTP_INP_INFO_RUNLOCK(); 2146 return (stcb); 2147 } else { 2148 /* 2149 * not him, this should only happen in rare 2150 * cases so I peg it. 2151 */ 2152 SCTP_STAT_INCR(sctps_vtagbogus); 2153 } 2154 } 2155 SCTP_TCB_UNLOCK(stcb); 2156 } 2157 SCTP_INP_INFO_RUNLOCK(); 2158 return (NULL); 2159 } 2160 2161 2162 /* 2163 * Find an association with the pointer to the inbound IP packet. This can be 2164 * a IPv4 or IPv6 packet. 2165 */ 2166 struct sctp_tcb * 2167 sctp_findassociation_addr(struct mbuf *m, int offset, 2168 struct sockaddr *src, struct sockaddr *dst, 2169 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2170 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2171 { 2172 int find_tcp_pool; 2173 struct sctp_tcb *stcb; 2174 struct sctp_inpcb *inp; 2175 2176 if (sh->v_tag) { 2177 /* we only go down this path if vtag is non-zero */ 2178 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2179 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2180 if (stcb) { 2181 return (stcb); 2182 } 2183 } 2184 find_tcp_pool = 0; 2185 if ((ch->chunk_type != SCTP_INITIATION) && 2186 (ch->chunk_type != SCTP_INITIATION_ACK) && 2187 (ch->chunk_type != SCTP_COOKIE_ACK) && 2188 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2189 /* Other chunk types go to the tcp pool. */ 2190 find_tcp_pool = 1; 2191 } 2192 if (inp_p) { 2193 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2194 find_tcp_pool, vrf_id); 2195 inp = *inp_p; 2196 } else { 2197 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2198 find_tcp_pool, vrf_id); 2199 } 2200 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2201 if (stcb == NULL && inp) { 2202 /* Found a EP but not this address */ 2203 if ((ch->chunk_type == SCTP_INITIATION) || 2204 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2205 /*- 2206 * special hook, we do NOT return linp or an 2207 * association that is linked to an existing 2208 * association that is under the TCP pool (i.e. no 2209 * listener exists). The endpoint finding routine 2210 * will always find a listener before examining the 2211 * TCP pool. 2212 */ 2213 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2214 if (inp_p) { 2215 *inp_p = NULL; 2216 } 2217 return (NULL); 2218 } 2219 stcb = sctp_findassociation_special_addr(m, 2220 offset, sh, &inp, netp, dst); 2221 if (inp_p != NULL) { 2222 *inp_p = inp; 2223 } 2224 } 2225 } 2226 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2227 return (stcb); 2228 } 2229 2230 /* 2231 * lookup an association by an ASCONF lookup address. 2232 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2233 */ 2234 struct sctp_tcb * 2235 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2236 struct sockaddr *dst, struct sctphdr *sh, 2237 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2238 { 2239 struct sctp_tcb *stcb; 2240 struct sockaddr_storage remote_store; 2241 struct sctp_paramhdr parm_buf, *phdr; 2242 int ptype; 2243 int zero_address = 0; 2244 2245 #ifdef INET 2246 struct sockaddr_in *sin; 2247 2248 #endif 2249 #ifdef INET6 2250 struct sockaddr_in6 *sin6; 2251 2252 #endif 2253 2254 memset(&remote_store, 0, sizeof(remote_store)); 2255 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2256 &parm_buf, sizeof(struct sctp_paramhdr)); 2257 if (phdr == NULL) { 2258 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2259 __FUNCTION__); 2260 return NULL; 2261 } 2262 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2263 /* get the correlation address */ 2264 switch (ptype) { 2265 #ifdef INET6 2266 case SCTP_IPV6_ADDRESS: 2267 { 2268 /* ipv6 address param */ 2269 struct sctp_ipv6addr_param *p6, p6_buf; 2270 2271 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2272 return NULL; 2273 } 2274 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2275 offset + sizeof(struct sctp_asconf_chunk), 2276 &p6_buf.ph, sizeof(*p6)); 2277 if (p6 == NULL) { 2278 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2279 __FUNCTION__); 2280 return (NULL); 2281 } 2282 sin6 = (struct sockaddr_in6 *)&remote_store; 2283 sin6->sin6_family = AF_INET6; 2284 sin6->sin6_len = sizeof(*sin6); 2285 sin6->sin6_port = sh->src_port; 2286 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2287 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2288 zero_address = 1; 2289 break; 2290 } 2291 #endif 2292 #ifdef INET 2293 case SCTP_IPV4_ADDRESS: 2294 { 2295 /* ipv4 address param */ 2296 struct sctp_ipv4addr_param *p4, p4_buf; 2297 2298 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2299 return NULL; 2300 } 2301 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2302 offset + sizeof(struct sctp_asconf_chunk), 2303 &p4_buf.ph, sizeof(*p4)); 2304 if (p4 == NULL) { 2305 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2306 __FUNCTION__); 2307 return (NULL); 2308 } 2309 sin = (struct sockaddr_in *)&remote_store; 2310 sin->sin_family = AF_INET; 2311 sin->sin_len = sizeof(*sin); 2312 sin->sin_port = sh->src_port; 2313 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2314 if (sin->sin_addr.s_addr == INADDR_ANY) 2315 zero_address = 1; 2316 break; 2317 } 2318 #endif 2319 default: 2320 /* invalid address param type */ 2321 return NULL; 2322 } 2323 2324 if (zero_address) { 2325 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2326 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2327 if (stcb != NULL) { 2328 SCTP_INP_DECR_REF(*inp_p); 2329 } 2330 } else { 2331 stcb = sctp_findassociation_ep_addr(inp_p, 2332 (struct sockaddr *)&remote_store, netp, 2333 dst, NULL); 2334 } 2335 return (stcb); 2336 } 2337 2338 2339 /* 2340 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2341 * addresses. This way if we don't get a bind we by default pick a ephemeral 2342 * port with all addresses bound. 2343 */ 2344 int 2345 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2346 { 2347 /* 2348 * we get called when a new endpoint starts up. We need to allocate 2349 * the sctp_inpcb structure from the zone and init it. Mark it as 2350 * unbound and find a port that we can use as an ephemeral with 2351 * INADDR_ANY. If the user binds later no problem we can then add in 2352 * the specific addresses. And setup the default parameters for the 2353 * EP. 2354 */ 2355 int i, error; 2356 struct sctp_inpcb *inp; 2357 struct sctp_pcb *m; 2358 struct timeval time; 2359 sctp_sharedkey_t *null_key; 2360 2361 error = 0; 2362 2363 SCTP_INP_INFO_WLOCK(); 2364 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2365 if (inp == NULL) { 2366 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2367 SCTP_INP_INFO_WUNLOCK(); 2368 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2369 return (ENOBUFS); 2370 } 2371 /* zap it */ 2372 bzero(inp, sizeof(*inp)); 2373 2374 /* bump generations */ 2375 /* setup socket pointers */ 2376 inp->sctp_socket = so; 2377 inp->ip_inp.inp.inp_socket = so; 2378 #ifdef INET6 2379 if (INP_SOCKAF(so) == AF_INET6) { 2380 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2381 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2382 } 2383 if (MODULE_GLOBAL(ip6_v6only)) { 2384 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2385 } 2386 } 2387 #endif 2388 inp->sctp_associd_counter = 1; 2389 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2390 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2391 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2392 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2393 /* init the small hash table we use to track asocid <-> tcb */ 2394 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2395 if (inp->sctp_asocidhash == NULL) { 2396 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2397 SCTP_INP_INFO_WUNLOCK(); 2398 return (ENOBUFS); 2399 } 2400 #ifdef IPSEC 2401 { 2402 struct inpcbpolicy *pcb_sp = NULL; 2403 2404 error = ipsec_init_policy(so, &pcb_sp); 2405 /* Arrange to share the policy */ 2406 inp->ip_inp.inp.inp_sp = pcb_sp; 2407 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2408 } 2409 if (error != 0) { 2410 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2411 SCTP_INP_INFO_WUNLOCK(); 2412 return error; 2413 } 2414 #endif /* IPSEC */ 2415 SCTP_INCR_EP_COUNT(); 2416 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2417 SCTP_INP_INFO_WUNLOCK(); 2418 2419 so->so_pcb = (caddr_t)inp; 2420 2421 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2422 /* UDP style socket */ 2423 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2424 SCTP_PCB_FLAGS_UNBOUND); 2425 /* Be sure it is NON-BLOCKING IO for UDP */ 2426 /* SCTP_SET_SO_NBIO(so); */ 2427 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2428 /* TCP style socket */ 2429 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2430 SCTP_PCB_FLAGS_UNBOUND); 2431 /* Be sure we have blocking IO by default */ 2432 SCTP_CLEAR_SO_NBIO(so); 2433 } else { 2434 /* 2435 * unsupported socket type (RAW, etc)- in case we missed it 2436 * in protosw 2437 */ 2438 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2439 so->so_pcb = NULL; 2440 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2441 return (EOPNOTSUPP); 2442 } 2443 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2444 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2445 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2446 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2447 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2448 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2449 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2450 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2451 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2452 } 2453 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2454 &inp->sctp_hashmark); 2455 if (inp->sctp_tcbhash == NULL) { 2456 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2457 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2458 so->so_pcb = NULL; 2459 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2460 return (ENOBUFS); 2461 } 2462 inp->def_vrf_id = vrf_id; 2463 2464 SCTP_INP_INFO_WLOCK(); 2465 SCTP_INP_LOCK_INIT(inp); 2466 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2467 SCTP_INP_READ_INIT(inp); 2468 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2469 /* lock the new ep */ 2470 SCTP_INP_WLOCK(inp); 2471 2472 /* add it to the info area */ 2473 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2474 SCTP_INP_INFO_WUNLOCK(); 2475 2476 TAILQ_INIT(&inp->read_queue); 2477 LIST_INIT(&inp->sctp_addr_list); 2478 2479 LIST_INIT(&inp->sctp_asoc_list); 2480 2481 #ifdef SCTP_TRACK_FREED_ASOCS 2482 /* TEMP CODE */ 2483 LIST_INIT(&inp->sctp_asoc_free_list); 2484 #endif 2485 /* Init the timer structure for signature change */ 2486 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2487 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2488 2489 /* now init the actual endpoint default data */ 2490 m = &inp->sctp_ep; 2491 2492 /* setup the base timeout information */ 2493 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2494 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2495 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2496 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2497 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2498 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2499 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2500 /* all max/min max are in ms */ 2501 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2502 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2503 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2504 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2505 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2506 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2507 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2508 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2509 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2510 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2511 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2512 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2513 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2514 2515 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2516 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2517 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2518 /* number of streams to pre-open on a association */ 2519 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2520 2521 /* Add adaptation cookie */ 2522 m->adaptation_layer_indicator = 0; 2523 m->adaptation_layer_indicator_provided = 0; 2524 2525 /* seed random number generator */ 2526 m->random_counter = 1; 2527 m->store_at = SCTP_SIGNATURE_SIZE; 2528 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2529 sctp_fill_random_store(m); 2530 2531 /* Minimum cookie size */ 2532 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2533 sizeof(struct sctp_state_cookie); 2534 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2535 2536 /* Setup the initial secret */ 2537 (void)SCTP_GETTIME_TIMEVAL(&time); 2538 m->time_of_secret_change = time.tv_sec; 2539 2540 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2541 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2542 } 2543 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2544 2545 /* How long is a cookie good for ? */ 2546 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2547 /* 2548 * Initialize authentication parameters 2549 */ 2550 m->local_hmacs = sctp_default_supported_hmaclist(); 2551 m->local_auth_chunks = sctp_alloc_chunklist(); 2552 m->default_dscp = 0; 2553 #ifdef INET6 2554 m->default_flowlabel = 0; 2555 #endif 2556 m->port = 0; /* encapsulation disabled by default */ 2557 sctp_auth_set_default_chunks(m->local_auth_chunks); 2558 LIST_INIT(&m->shared_keys); 2559 /* add default NULL key as key id 0 */ 2560 null_key = sctp_alloc_sharedkey(); 2561 sctp_insert_sharedkey(&m->shared_keys, null_key); 2562 SCTP_INP_WUNLOCK(inp); 2563 #ifdef SCTP_LOG_CLOSING 2564 sctp_log_closing(inp, NULL, 12); 2565 #endif 2566 return (error); 2567 } 2568 2569 2570 void 2571 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2572 struct sctp_tcb *stcb) 2573 { 2574 struct sctp_nets *net; 2575 uint16_t lport, rport; 2576 struct sctppcbhead *head; 2577 struct sctp_laddr *laddr, *oladdr; 2578 2579 atomic_add_int(&stcb->asoc.refcnt, 1); 2580 SCTP_TCB_UNLOCK(stcb); 2581 SCTP_INP_INFO_WLOCK(); 2582 SCTP_INP_WLOCK(old_inp); 2583 SCTP_INP_WLOCK(new_inp); 2584 SCTP_TCB_LOCK(stcb); 2585 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2586 2587 new_inp->sctp_ep.time_of_secret_change = 2588 old_inp->sctp_ep.time_of_secret_change; 2589 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2590 sizeof(old_inp->sctp_ep.secret_key)); 2591 new_inp->sctp_ep.current_secret_number = 2592 old_inp->sctp_ep.current_secret_number; 2593 new_inp->sctp_ep.last_secret_number = 2594 old_inp->sctp_ep.last_secret_number; 2595 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2596 2597 /* make it so new data pours into the new socket */ 2598 stcb->sctp_socket = new_inp->sctp_socket; 2599 stcb->sctp_ep = new_inp; 2600 2601 /* Copy the port across */ 2602 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2603 rport = stcb->rport; 2604 /* Pull the tcb from the old association */ 2605 LIST_REMOVE(stcb, sctp_tcbhash); 2606 LIST_REMOVE(stcb, sctp_tcblist); 2607 if (stcb->asoc.in_asocid_hash) { 2608 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2609 } 2610 /* Now insert the new_inp into the TCP connected hash */ 2611 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2612 2613 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2614 /* Its safe to access */ 2615 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2616 2617 /* Now move the tcb into the endpoint list */ 2618 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2619 /* 2620 * Question, do we even need to worry about the ep-hash since we 2621 * only have one connection? Probably not :> so lets get rid of it 2622 * and not suck up any kernel memory in that. 2623 */ 2624 if (stcb->asoc.in_asocid_hash) { 2625 struct sctpasochead *lhd; 2626 2627 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2628 new_inp->hashasocidmark)]; 2629 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2630 } 2631 /* Ok. Let's restart timer. */ 2632 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2633 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2634 stcb, net); 2635 } 2636 2637 SCTP_INP_INFO_WUNLOCK(); 2638 if (new_inp->sctp_tcbhash != NULL) { 2639 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2640 new_inp->sctp_tcbhash = NULL; 2641 } 2642 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2643 /* Subset bound, so copy in the laddr list from the old_inp */ 2644 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2645 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2646 if (laddr == NULL) { 2647 /* 2648 * Gak, what can we do? This assoc is really 2649 * HOSED. We probably should send an abort 2650 * here. 2651 */ 2652 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2653 continue; 2654 } 2655 SCTP_INCR_LADDR_COUNT(); 2656 bzero(laddr, sizeof(*laddr)); 2657 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2658 laddr->ifa = oladdr->ifa; 2659 atomic_add_int(&laddr->ifa->refcount, 1); 2660 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2661 sctp_nxt_addr); 2662 new_inp->laddr_count++; 2663 if (oladdr == stcb->asoc.last_used_address) { 2664 stcb->asoc.last_used_address = laddr; 2665 } 2666 } 2667 } 2668 /* 2669 * Now any running timers need to be adjusted since we really don't 2670 * care if they are running or not just blast in the new_inp into 2671 * all of them. 2672 */ 2673 2674 stcb->asoc.dack_timer.ep = (void *)new_inp; 2675 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2676 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2677 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2678 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2679 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2680 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2681 /* now what about the nets? */ 2682 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2683 net->pmtu_timer.ep = (void *)new_inp; 2684 net->hb_timer.ep = (void *)new_inp; 2685 net->rxt_timer.ep = (void *)new_inp; 2686 } 2687 SCTP_INP_WUNLOCK(new_inp); 2688 SCTP_INP_WUNLOCK(old_inp); 2689 } 2690 2691 2692 2693 2694 /* sctp_ifap is used to bypass normal local address validation checks */ 2695 int 2696 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2697 struct sctp_ifa *sctp_ifap, struct thread *p) 2698 { 2699 /* bind a ep to a socket address */ 2700 struct sctppcbhead *head; 2701 struct sctp_inpcb *inp, *inp_tmp; 2702 struct inpcb *ip_inp; 2703 int port_reuse_active = 0; 2704 int bindall; 2705 uint16_t lport; 2706 int error; 2707 uint32_t vrf_id; 2708 2709 lport = 0; 2710 error = 0; 2711 bindall = 1; 2712 inp = (struct sctp_inpcb *)so->so_pcb; 2713 ip_inp = (struct inpcb *)so->so_pcb; 2714 #ifdef SCTP_DEBUG 2715 if (addr) { 2716 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2717 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2718 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2719 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2720 } 2721 #endif 2722 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2723 /* already did a bind, subsequent binds NOT allowed ! */ 2724 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2725 return (EINVAL); 2726 } 2727 #ifdef INVARIANTS 2728 if (p == NULL) 2729 panic("null proc/thread"); 2730 #endif 2731 if (addr != NULL) { 2732 switch (addr->sa_family) { 2733 #ifdef INET 2734 case AF_INET: 2735 { 2736 struct sockaddr_in *sin; 2737 2738 /* IPV6_V6ONLY socket? */ 2739 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2740 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2741 return (EINVAL); 2742 } 2743 if (addr->sa_len != sizeof(*sin)) { 2744 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2745 return (EINVAL); 2746 } 2747 sin = (struct sockaddr_in *)addr; 2748 lport = sin->sin_port; 2749 /* 2750 * For LOOPBACK the prison_local_ip4() call 2751 * will transmute the ip address to the 2752 * proper value. 2753 */ 2754 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2755 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2756 return (error); 2757 } 2758 if (sin->sin_addr.s_addr != INADDR_ANY) { 2759 bindall = 0; 2760 } 2761 break; 2762 } 2763 #endif 2764 #ifdef INET6 2765 case AF_INET6: 2766 { 2767 /* 2768 * Only for pure IPv6 Address. (No IPv4 2769 * Mapped!) 2770 */ 2771 struct sockaddr_in6 *sin6; 2772 2773 sin6 = (struct sockaddr_in6 *)addr; 2774 2775 if (addr->sa_len != sizeof(*sin6)) { 2776 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2777 return (EINVAL); 2778 } 2779 lport = sin6->sin6_port; 2780 /* 2781 * For LOOPBACK the prison_local_ip6() call 2782 * will transmute the ipv6 address to the 2783 * proper value. 2784 */ 2785 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2786 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2787 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2788 return (error); 2789 } 2790 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2791 bindall = 0; 2792 /* KAME hack: embed scopeid */ 2793 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2794 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2795 return (EINVAL); 2796 } 2797 } 2798 /* this must be cleared for ifa_ifwithaddr() */ 2799 sin6->sin6_scope_id = 0; 2800 break; 2801 } 2802 #endif 2803 default: 2804 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2805 return (EAFNOSUPPORT); 2806 } 2807 } 2808 SCTP_INP_INFO_WLOCK(); 2809 SCTP_INP_WLOCK(inp); 2810 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2811 vrf_id = inp->def_vrf_id; 2812 2813 /* increase our count due to the unlock we do */ 2814 SCTP_INP_INCR_REF(inp); 2815 if (lport) { 2816 /* 2817 * Did the caller specify a port? if so we must see if an ep 2818 * already has this one bound. 2819 */ 2820 /* got to be root to get at low ports */ 2821 if (ntohs(lport) < IPPORT_RESERVED) { 2822 if (p && (error = 2823 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2824 )) { 2825 SCTP_INP_DECR_REF(inp); 2826 SCTP_INP_WUNLOCK(inp); 2827 SCTP_INP_INFO_WUNLOCK(); 2828 return (error); 2829 } 2830 } 2831 if (p == NULL) { 2832 SCTP_INP_DECR_REF(inp); 2833 SCTP_INP_WUNLOCK(inp); 2834 SCTP_INP_INFO_WUNLOCK(); 2835 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2836 return (error); 2837 } 2838 SCTP_INP_WUNLOCK(inp); 2839 if (bindall) { 2840 vrf_id = inp->def_vrf_id; 2841 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2842 if (inp_tmp != NULL) { 2843 /* 2844 * lock guy returned and lower count note 2845 * that we are not bound so inp_tmp should 2846 * NEVER be inp. And it is this inp 2847 * (inp_tmp) that gets the reference bump, 2848 * so we must lower it. 2849 */ 2850 SCTP_INP_DECR_REF(inp_tmp); 2851 /* unlock info */ 2852 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2853 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2854 /* 2855 * Ok, must be one-2-one and 2856 * allowing port re-use 2857 */ 2858 port_reuse_active = 1; 2859 goto continue_anyway; 2860 } 2861 SCTP_INP_DECR_REF(inp); 2862 SCTP_INP_INFO_WUNLOCK(); 2863 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2864 return (EADDRINUSE); 2865 } 2866 } else { 2867 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2868 if (inp_tmp != NULL) { 2869 /* 2870 * lock guy returned and lower count note 2871 * that we are not bound so inp_tmp should 2872 * NEVER be inp. And it is this inp 2873 * (inp_tmp) that gets the reference bump, 2874 * so we must lower it. 2875 */ 2876 SCTP_INP_DECR_REF(inp_tmp); 2877 /* unlock info */ 2878 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2879 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2880 /* 2881 * Ok, must be one-2-one and 2882 * allowing port re-use 2883 */ 2884 port_reuse_active = 1; 2885 goto continue_anyway; 2886 } 2887 SCTP_INP_DECR_REF(inp); 2888 SCTP_INP_INFO_WUNLOCK(); 2889 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2890 return (EADDRINUSE); 2891 } 2892 } 2893 continue_anyway: 2894 SCTP_INP_WLOCK(inp); 2895 if (bindall) { 2896 /* verify that no lport is not used by a singleton */ 2897 if ((port_reuse_active == 0) && 2898 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2899 /* Sorry someone already has this one bound */ 2900 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2901 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2902 port_reuse_active = 1; 2903 } else { 2904 SCTP_INP_DECR_REF(inp); 2905 SCTP_INP_WUNLOCK(inp); 2906 SCTP_INP_INFO_WUNLOCK(); 2907 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2908 return (EADDRINUSE); 2909 } 2910 } 2911 } 2912 } else { 2913 uint16_t first, last, candidate; 2914 uint16_t count; 2915 int done; 2916 2917 if (ip_inp->inp_flags & INP_HIGHPORT) { 2918 first = MODULE_GLOBAL(ipport_hifirstauto); 2919 last = MODULE_GLOBAL(ipport_hilastauto); 2920 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2921 if (p && (error = 2922 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2923 )) { 2924 SCTP_INP_DECR_REF(inp); 2925 SCTP_INP_WUNLOCK(inp); 2926 SCTP_INP_INFO_WUNLOCK(); 2927 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2928 return (error); 2929 } 2930 first = MODULE_GLOBAL(ipport_lowfirstauto); 2931 last = MODULE_GLOBAL(ipport_lowlastauto); 2932 } else { 2933 first = MODULE_GLOBAL(ipport_firstauto); 2934 last = MODULE_GLOBAL(ipport_lastauto); 2935 } 2936 if (first > last) { 2937 uint16_t temp; 2938 2939 temp = first; 2940 first = last; 2941 last = temp; 2942 } 2943 count = last - first + 1; /* number of candidates */ 2944 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2945 2946 done = 0; 2947 while (!done) { 2948 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2949 done = 1; 2950 } 2951 if (!done) { 2952 if (--count == 0) { 2953 SCTP_INP_DECR_REF(inp); 2954 SCTP_INP_WUNLOCK(inp); 2955 SCTP_INP_INFO_WUNLOCK(); 2956 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2957 return (EADDRINUSE); 2958 } 2959 if (candidate == last) 2960 candidate = first; 2961 else 2962 candidate = candidate + 1; 2963 } 2964 } 2965 lport = htons(candidate); 2966 } 2967 SCTP_INP_DECR_REF(inp); 2968 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2969 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2970 /* 2971 * this really should not happen. The guy did a non-blocking 2972 * bind and then did a close at the same time. 2973 */ 2974 SCTP_INP_WUNLOCK(inp); 2975 SCTP_INP_INFO_WUNLOCK(); 2976 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2977 return (EINVAL); 2978 } 2979 /* ok we look clear to give out this port, so lets setup the binding */ 2980 if (bindall) { 2981 /* binding to all addresses, so just set in the proper flags */ 2982 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2983 /* set the automatic addr changes from kernel flag */ 2984 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2985 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2986 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2987 } else { 2988 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2989 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2990 } 2991 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2992 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2993 } else { 2994 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2995 } 2996 /* 2997 * set the automatic mobility_base from kernel flag (by 2998 * micchie) 2999 */ 3000 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3001 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3002 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3003 } else { 3004 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3005 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3006 } 3007 /* 3008 * set the automatic mobility_fasthandoff from kernel flag 3009 * (by micchie) 3010 */ 3011 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3012 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3013 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3014 } else { 3015 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3016 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3017 } 3018 } else { 3019 /* 3020 * bind specific, make sure flags is off and add a new 3021 * address structure to the sctp_addr_list inside the ep 3022 * structure. 3023 * 3024 * We will need to allocate one and insert it at the head. The 3025 * socketopt call can just insert new addresses in there as 3026 * well. It will also have to do the embed scope kame hack 3027 * too (before adding). 3028 */ 3029 struct sctp_ifa *ifa; 3030 struct sockaddr_storage store_sa; 3031 3032 memset(&store_sa, 0, sizeof(store_sa)); 3033 switch (addr->sa_family) { 3034 #ifdef INET 3035 case AF_INET: 3036 { 3037 struct sockaddr_in *sin; 3038 3039 sin = (struct sockaddr_in *)&store_sa; 3040 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3041 sin->sin_port = 0; 3042 break; 3043 } 3044 #endif 3045 #ifdef INET6 3046 case AF_INET6: 3047 { 3048 struct sockaddr_in6 *sin6; 3049 3050 sin6 = (struct sockaddr_in6 *)&store_sa; 3051 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3052 sin6->sin6_port = 0; 3053 break; 3054 } 3055 #endif 3056 default: 3057 break; 3058 } 3059 /* 3060 * first find the interface with the bound address need to 3061 * zero out the port to find the address! yuck! can't do 3062 * this earlier since need port for sctp_pcb_findep() 3063 */ 3064 if (sctp_ifap != NULL) { 3065 ifa = sctp_ifap; 3066 } else { 3067 /* 3068 * Note for BSD we hit here always other O/S's will 3069 * pass things in via the sctp_ifap argument 3070 * (Panda). 3071 */ 3072 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3073 vrf_id, SCTP_ADDR_NOT_LOCKED); 3074 } 3075 if (ifa == NULL) { 3076 /* Can't find an interface with that address */ 3077 SCTP_INP_WUNLOCK(inp); 3078 SCTP_INP_INFO_WUNLOCK(); 3079 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3080 return (EADDRNOTAVAIL); 3081 } 3082 #ifdef INET6 3083 if (addr->sa_family == AF_INET6) { 3084 /* GAK, more FIXME IFA lock? */ 3085 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3086 /* Can't bind a non-existent addr. */ 3087 SCTP_INP_WUNLOCK(inp); 3088 SCTP_INP_INFO_WUNLOCK(); 3089 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3090 return (EINVAL); 3091 } 3092 } 3093 #endif 3094 /* we're not bound all */ 3095 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3096 /* allow bindx() to send ASCONF's for binding changes */ 3097 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3098 /* clear automatic addr changes from kernel flag */ 3099 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3100 3101 /* add this address to the endpoint list */ 3102 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3103 if (error != 0) { 3104 SCTP_INP_WUNLOCK(inp); 3105 SCTP_INP_INFO_WUNLOCK(); 3106 return (error); 3107 } 3108 inp->laddr_count++; 3109 } 3110 /* find the bucket */ 3111 if (port_reuse_active) { 3112 /* Put it into tcp 1-2-1 hash */ 3113 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3114 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3115 } else { 3116 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3117 } 3118 /* put it in the bucket */ 3119 LIST_INSERT_HEAD(head, inp, sctp_hash); 3120 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3121 (void *)head, ntohs(lport), port_reuse_active); 3122 /* set in the port */ 3123 inp->sctp_lport = lport; 3124 3125 /* turn off just the unbound flag */ 3126 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3127 SCTP_INP_WUNLOCK(inp); 3128 SCTP_INP_INFO_WUNLOCK(); 3129 return (0); 3130 } 3131 3132 3133 static void 3134 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3135 { 3136 struct sctp_iterator *it, *nit; 3137 3138 /* 3139 * We enter with the only the ITERATOR_LOCK in place and a write 3140 * lock on the inp_info stuff. 3141 */ 3142 it = sctp_it_ctl.cur_it; 3143 if (it && (it->vn != curvnet)) { 3144 /* Its not looking at our VNET */ 3145 return; 3146 } 3147 if (it && (it->inp == inp)) { 3148 /* 3149 * This is tricky and we hold the iterator lock, but when it 3150 * returns and gets the lock (when we release it) the 3151 * iterator will try to operate on inp. We need to stop that 3152 * from happening. But of course the iterator has a 3153 * reference on the stcb and inp. We can mark it and it will 3154 * stop. 3155 * 3156 * If its a single iterator situation, we set the end iterator 3157 * flag. Otherwise we set the iterator to go to the next 3158 * inp. 3159 * 3160 */ 3161 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3162 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3163 } else { 3164 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3165 } 3166 } 3167 /* 3168 * Now go through and remove any single reference to our inp that 3169 * may be still pending on the list 3170 */ 3171 SCTP_IPI_ITERATOR_WQ_LOCK(); 3172 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3173 if (it->vn != curvnet) { 3174 continue; 3175 } 3176 if (it->inp == inp) { 3177 /* This one points to me is it inp specific? */ 3178 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3179 /* Remove and free this one */ 3180 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3181 it, sctp_nxt_itr); 3182 if (it->function_atend != NULL) { 3183 (*it->function_atend) (it->pointer, it->val); 3184 } 3185 SCTP_FREE(it, SCTP_M_ITER); 3186 } else { 3187 it->inp = LIST_NEXT(it->inp, sctp_list); 3188 if (it->inp) { 3189 SCTP_INP_INCR_REF(it->inp); 3190 } 3191 } 3192 /* 3193 * When its put in the refcnt is incremented so decr 3194 * it 3195 */ 3196 SCTP_INP_DECR_REF(inp); 3197 } 3198 } 3199 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3200 } 3201 3202 /* release sctp_inpcb unbind the port */ 3203 void 3204 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3205 { 3206 /* 3207 * Here we free a endpoint. We must find it (if it is in the Hash 3208 * table) and remove it from there. Then we must also find it in the 3209 * overall list and remove it from there. After all removals are 3210 * complete then any timer has to be stopped. Then start the actual 3211 * freeing. a) Any local lists. b) Any associations. c) The hash of 3212 * all associations. d) finally the ep itself. 3213 */ 3214 struct sctp_tcb *asoc, *nasoc; 3215 struct sctp_laddr *laddr, *nladdr; 3216 struct inpcb *ip_pcb; 3217 struct socket *so; 3218 int being_refed = 0; 3219 struct sctp_queued_to_read *sq, *nsq; 3220 int cnt; 3221 sctp_sharedkey_t *shared_key, *nshared_key; 3222 3223 3224 #ifdef SCTP_LOG_CLOSING 3225 sctp_log_closing(inp, NULL, 0); 3226 #endif 3227 SCTP_ITERATOR_LOCK(); 3228 /* mark any iterators on the list or being processed */ 3229 sctp_iterator_inp_being_freed(inp); 3230 SCTP_ITERATOR_UNLOCK(); 3231 so = inp->sctp_socket; 3232 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3233 /* been here before.. eeks.. get out of here */ 3234 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3235 #ifdef SCTP_LOG_CLOSING 3236 sctp_log_closing(inp, NULL, 1); 3237 #endif 3238 return; 3239 } 3240 SCTP_ASOC_CREATE_LOCK(inp); 3241 SCTP_INP_INFO_WLOCK(); 3242 3243 SCTP_INP_WLOCK(inp); 3244 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3245 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3246 /* socket is gone, so no more wakeups allowed */ 3247 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3248 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3249 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3250 3251 } 3252 /* First time through we have the socket lock, after that no more. */ 3253 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3254 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3255 3256 if (inp->control) { 3257 sctp_m_freem(inp->control); 3258 inp->control = NULL; 3259 } 3260 if (inp->pkt) { 3261 sctp_m_freem(inp->pkt); 3262 inp->pkt = NULL; 3263 } 3264 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3265 * here but I will be nice :> (i.e. 3266 * ip_pcb = ep;) */ 3267 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3268 int cnt_in_sd; 3269 3270 cnt_in_sd = 0; 3271 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3272 SCTP_TCB_LOCK(asoc); 3273 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3274 /* Skip guys being freed */ 3275 cnt_in_sd++; 3276 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3277 /* 3278 * Special case - we did not start a 3279 * kill timer on the asoc due to it 3280 * was not closed. So go ahead and 3281 * start it now. 3282 */ 3283 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3284 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3285 } 3286 SCTP_TCB_UNLOCK(asoc); 3287 continue; 3288 } 3289 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3290 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3291 (asoc->asoc.total_output_queue_size == 0)) { 3292 /* 3293 * If we have data in queue, we don't want 3294 * to just free since the app may have done, 3295 * send()/close or connect/send/close. And 3296 * it wants the data to get across first. 3297 */ 3298 /* Just abandon things in the front states */ 3299 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3300 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3301 cnt_in_sd++; 3302 } 3303 continue; 3304 } 3305 /* Disconnect the socket please */ 3306 asoc->sctp_socket = NULL; 3307 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3308 if ((asoc->asoc.size_on_reasm_queue > 0) || 3309 (asoc->asoc.control_pdapi) || 3310 (asoc->asoc.size_on_all_streams > 0) || 3311 (so && (so->so_rcv.sb_cc > 0))) { 3312 /* Left with Data unread */ 3313 struct mbuf *op_err; 3314 3315 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3316 0, M_NOWAIT, 1, MT_DATA); 3317 if (op_err) { 3318 /* Fill in the user initiated abort */ 3319 struct sctp_paramhdr *ph; 3320 3321 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 3322 ph = mtod(op_err, struct sctp_paramhdr *); 3323 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 3324 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3325 } 3326 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3327 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3328 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3329 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3330 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3331 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3332 } 3333 if (sctp_free_assoc(inp, asoc, 3334 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3335 cnt_in_sd++; 3336 } 3337 continue; 3338 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3339 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3340 (asoc->asoc.stream_queue_cnt == 0)) { 3341 if (asoc->asoc.locked_on_sending) { 3342 goto abort_anyway; 3343 } 3344 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3345 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3346 struct sctp_nets *netp; 3347 3348 /* 3349 * there is nothing queued to send, 3350 * so I send shutdown 3351 */ 3352 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3353 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3354 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3355 } 3356 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3357 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3358 sctp_stop_timers_for_shutdown(asoc); 3359 if (asoc->asoc.alternate) { 3360 netp = asoc->asoc.alternate; 3361 } else { 3362 netp = asoc->asoc.primary_destination; 3363 } 3364 sctp_send_shutdown(asoc, netp); 3365 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3366 netp); 3367 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3368 asoc->asoc.primary_destination); 3369 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3370 } 3371 } else { 3372 /* mark into shutdown pending */ 3373 struct sctp_stream_queue_pending *sp; 3374 3375 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3376 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3377 asoc->asoc.primary_destination); 3378 if (asoc->asoc.locked_on_sending) { 3379 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3380 sctp_streamhead); 3381 if (sp == NULL) { 3382 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3383 (void *)asoc->asoc.locked_on_sending, 3384 asoc->asoc.locked_on_sending->stream_no); 3385 } else { 3386 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3387 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3388 } 3389 } 3390 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3391 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3392 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3393 struct mbuf *op_err; 3394 3395 abort_anyway: 3396 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3397 0, M_NOWAIT, 1, MT_DATA); 3398 if (op_err) { 3399 /* 3400 * Fill in the user 3401 * initiated abort 3402 */ 3403 struct sctp_paramhdr *ph; 3404 3405 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 3406 ph = mtod(op_err, struct sctp_paramhdr *); 3407 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 3408 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3409 } 3410 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3411 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3412 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3413 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3414 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3415 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3416 } 3417 if (sctp_free_assoc(inp, asoc, 3418 SCTP_PCBFREE_NOFORCE, 3419 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3420 cnt_in_sd++; 3421 } 3422 continue; 3423 } else { 3424 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3425 } 3426 } 3427 cnt_in_sd++; 3428 SCTP_TCB_UNLOCK(asoc); 3429 } 3430 /* now is there some left in our SHUTDOWN state? */ 3431 if (cnt_in_sd) { 3432 #ifdef SCTP_LOG_CLOSING 3433 sctp_log_closing(inp, NULL, 2); 3434 #endif 3435 inp->sctp_socket = NULL; 3436 SCTP_INP_WUNLOCK(inp); 3437 SCTP_ASOC_CREATE_UNLOCK(inp); 3438 SCTP_INP_INFO_WUNLOCK(); 3439 return; 3440 } 3441 } 3442 inp->sctp_socket = NULL; 3443 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3444 SCTP_PCB_FLAGS_UNBOUND) { 3445 /* 3446 * ok, this guy has been bound. It's port is somewhere in 3447 * the SCTP_BASE_INFO(hash table). Remove it! 3448 */ 3449 LIST_REMOVE(inp, sctp_hash); 3450 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3451 } 3452 /* 3453 * If there is a timer running to kill us, forget it, since it may 3454 * have a contest on the INP lock.. which would cause us to die ... 3455 */ 3456 cnt = 0; 3457 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3458 SCTP_TCB_LOCK(asoc); 3459 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3460 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3461 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3462 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3463 } 3464 cnt++; 3465 SCTP_TCB_UNLOCK(asoc); 3466 continue; 3467 } 3468 /* Free associations that are NOT killing us */ 3469 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3470 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3471 struct mbuf *op_err; 3472 3473 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3474 0, M_NOWAIT, 1, MT_DATA); 3475 if (op_err) { 3476 /* Fill in the user initiated abort */ 3477 struct sctp_paramhdr *ph; 3478 3479 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 3480 ph = mtod(op_err, struct sctp_paramhdr *); 3481 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 3482 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3483 } 3484 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3485 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3486 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3487 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3488 cnt++; 3489 SCTP_TCB_UNLOCK(asoc); 3490 continue; 3491 } 3492 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3493 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3494 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3495 } 3496 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3497 cnt++; 3498 } 3499 } 3500 if (cnt) { 3501 /* Ok we have someone out there that will kill us */ 3502 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3503 #ifdef SCTP_LOG_CLOSING 3504 sctp_log_closing(inp, NULL, 3); 3505 #endif 3506 SCTP_INP_WUNLOCK(inp); 3507 SCTP_ASOC_CREATE_UNLOCK(inp); 3508 SCTP_INP_INFO_WUNLOCK(); 3509 return; 3510 } 3511 if (SCTP_INP_LOCK_CONTENDED(inp)) 3512 being_refed++; 3513 if (SCTP_INP_READ_CONTENDED(inp)) 3514 being_refed++; 3515 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3516 being_refed++; 3517 3518 if ((inp->refcount) || 3519 (being_refed) || 3520 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3521 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3522 #ifdef SCTP_LOG_CLOSING 3523 sctp_log_closing(inp, NULL, 4); 3524 #endif 3525 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3526 SCTP_INP_WUNLOCK(inp); 3527 SCTP_ASOC_CREATE_UNLOCK(inp); 3528 SCTP_INP_INFO_WUNLOCK(); 3529 return; 3530 } 3531 inp->sctp_ep.signature_change.type = 0; 3532 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3533 /* 3534 * Remove it from the list .. last thing we need a lock for. 3535 */ 3536 LIST_REMOVE(inp, sctp_list); 3537 SCTP_INP_WUNLOCK(inp); 3538 SCTP_ASOC_CREATE_UNLOCK(inp); 3539 SCTP_INP_INFO_WUNLOCK(); 3540 /* 3541 * Now we release all locks. Since this INP cannot be found anymore 3542 * except possibly by the kill timer that might be running. We call 3543 * the drain function here. It should hit the case were it sees the 3544 * ACTIVE flag cleared and exit out freeing us to proceed and 3545 * destroy everything. 3546 */ 3547 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3548 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3549 } else { 3550 /* Probably un-needed */ 3551 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3552 } 3553 3554 #ifdef SCTP_LOG_CLOSING 3555 sctp_log_closing(inp, NULL, 5); 3556 #endif 3557 3558 3559 if ((inp->sctp_asocidhash) != NULL) { 3560 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3561 inp->sctp_asocidhash = NULL; 3562 } 3563 /* sa_ignore FREED_MEMORY */ 3564 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3565 /* Its only abandoned if it had data left */ 3566 if (sq->length) 3567 SCTP_STAT_INCR(sctps_left_abandon); 3568 3569 TAILQ_REMOVE(&inp->read_queue, sq, next); 3570 sctp_free_remote_addr(sq->whoFrom); 3571 if (so) 3572 so->so_rcv.sb_cc -= sq->length; 3573 if (sq->data) { 3574 sctp_m_freem(sq->data); 3575 sq->data = NULL; 3576 } 3577 /* 3578 * no need to free the net count, since at this point all 3579 * assoc's are gone. 3580 */ 3581 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3582 SCTP_DECR_READQ_COUNT(); 3583 } 3584 /* Now the sctp_pcb things */ 3585 /* 3586 * free each asoc if it is not already closed/free. we can't use the 3587 * macro here since le_next will get freed as part of the 3588 * sctp_free_assoc() call. 3589 */ 3590 if (so) { 3591 #ifdef IPSEC 3592 ipsec_delete_pcbpolicy(ip_pcb); 3593 #endif /* IPSEC */ 3594 3595 /* Unlocks not needed since the socket is gone now */ 3596 } 3597 if (ip_pcb->inp_options) { 3598 (void)sctp_m_free(ip_pcb->inp_options); 3599 ip_pcb->inp_options = 0; 3600 } 3601 #ifdef INET6 3602 if (ip_pcb->inp_vflag & INP_IPV6) { 3603 struct in6pcb *in6p; 3604 3605 in6p = (struct in6pcb *)inp; 3606 ip6_freepcbopts(in6p->in6p_outputopts); 3607 } 3608 #endif /* INET6 */ 3609 ip_pcb->inp_vflag = 0; 3610 /* free up authentication fields */ 3611 if (inp->sctp_ep.local_auth_chunks != NULL) 3612 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3613 if (inp->sctp_ep.local_hmacs != NULL) 3614 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3615 3616 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3617 LIST_REMOVE(shared_key, next); 3618 sctp_free_sharedkey(shared_key); 3619 /* sa_ignore FREED_MEMORY */ 3620 } 3621 3622 /* 3623 * if we have an address list the following will free the list of 3624 * ifaddr's that are set into this ep. Again macro limitations here, 3625 * since the LIST_FOREACH could be a bad idea. 3626 */ 3627 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3628 sctp_remove_laddr(laddr); 3629 } 3630 3631 #ifdef SCTP_TRACK_FREED_ASOCS 3632 /* TEMP CODE */ 3633 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3634 LIST_REMOVE(asoc, sctp_tcblist); 3635 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3636 SCTP_DECR_ASOC_COUNT(); 3637 } 3638 /* *** END TEMP CODE *** */ 3639 #endif 3640 /* Now lets see about freeing the EP hash table. */ 3641 if (inp->sctp_tcbhash != NULL) { 3642 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3643 inp->sctp_tcbhash = NULL; 3644 } 3645 /* Now we must put the ep memory back into the zone pool */ 3646 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3647 SCTP_INP_LOCK_DESTROY(inp); 3648 SCTP_INP_READ_DESTROY(inp); 3649 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3650 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3651 SCTP_DECR_EP_COUNT(); 3652 } 3653 3654 3655 struct sctp_nets * 3656 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3657 { 3658 struct sctp_nets *net; 3659 3660 /* locate the address */ 3661 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3662 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3663 return (net); 3664 } 3665 return (NULL); 3666 } 3667 3668 3669 int 3670 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3671 { 3672 struct sctp_ifa *sctp_ifa; 3673 3674 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3675 if (sctp_ifa) { 3676 return (1); 3677 } else { 3678 return (0); 3679 } 3680 } 3681 3682 /* 3683 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3684 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3685 * stats of stuff. 3686 */ 3687 int 3688 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3689 struct sctp_nets **netp, int set_scope, int from) 3690 { 3691 /* 3692 * The following is redundant to the same lines in the 3693 * sctp_aloc_assoc() but is needed since others call the add address 3694 * function 3695 */ 3696 struct sctp_nets *net, *netfirst; 3697 int addr_inscope; 3698 3699 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3700 from); 3701 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3702 3703 netfirst = sctp_findnet(stcb, newaddr); 3704 if (netfirst) { 3705 /* 3706 * Lie and return ok, we don't want to make the association 3707 * go away for this behavior. It will happen in the TCP 3708 * model in a connected socket. It does not reach the hash 3709 * table until after the association is built so it can't be 3710 * found. Mark as reachable, since the initial creation will 3711 * have been cleared and the NOT_IN_ASSOC flag will have 3712 * been added... and we don't want to end up removing it 3713 * back out. 3714 */ 3715 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3716 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3717 SCTP_ADDR_UNCONFIRMED); 3718 } else { 3719 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3720 } 3721 3722 return (0); 3723 } 3724 addr_inscope = 1; 3725 switch (newaddr->sa_family) { 3726 #ifdef INET 3727 case AF_INET: 3728 { 3729 struct sockaddr_in *sin; 3730 3731 sin = (struct sockaddr_in *)newaddr; 3732 if (sin->sin_addr.s_addr == 0) { 3733 /* Invalid address */ 3734 return (-1); 3735 } 3736 /* zero out the bzero area */ 3737 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3738 3739 /* assure len is set */ 3740 sin->sin_len = sizeof(struct sockaddr_in); 3741 if (set_scope) { 3742 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3743 stcb->ipv4_local_scope = 1; 3744 #else 3745 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3746 stcb->asoc.scope.ipv4_local_scope = 1; 3747 } 3748 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3749 } else { 3750 /* Validate the address is in scope */ 3751 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3752 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3753 addr_inscope = 0; 3754 } 3755 } 3756 break; 3757 } 3758 #endif 3759 #ifdef INET6 3760 case AF_INET6: 3761 { 3762 struct sockaddr_in6 *sin6; 3763 3764 sin6 = (struct sockaddr_in6 *)newaddr; 3765 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3766 /* Invalid address */ 3767 return (-1); 3768 } 3769 /* assure len is set */ 3770 sin6->sin6_len = sizeof(struct sockaddr_in6); 3771 if (set_scope) { 3772 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3773 stcb->asoc.scope.loopback_scope = 1; 3774 stcb->asoc.scope.local_scope = 0; 3775 stcb->asoc.scope.ipv4_local_scope = 1; 3776 stcb->asoc.scope.site_scope = 1; 3777 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3778 /* 3779 * If the new destination is a 3780 * LINK_LOCAL we must have common 3781 * site scope. Don't set the local 3782 * scope since we may not share all 3783 * links, only loopback can do this. 3784 * Links on the local network would 3785 * also be on our private network 3786 * for v4 too. 3787 */ 3788 stcb->asoc.scope.ipv4_local_scope = 1; 3789 stcb->asoc.scope.site_scope = 1; 3790 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3791 /* 3792 * If the new destination is 3793 * SITE_LOCAL then we must have site 3794 * scope in common. 3795 */ 3796 stcb->asoc.scope.site_scope = 1; 3797 } 3798 } else { 3799 /* Validate the address is in scope */ 3800 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3801 (stcb->asoc.scope.loopback_scope == 0)) { 3802 addr_inscope = 0; 3803 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3804 (stcb->asoc.scope.local_scope == 0)) { 3805 addr_inscope = 0; 3806 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3807 (stcb->asoc.scope.site_scope == 0)) { 3808 addr_inscope = 0; 3809 } 3810 } 3811 break; 3812 } 3813 #endif 3814 default: 3815 /* not supported family type */ 3816 return (-1); 3817 } 3818 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3819 if (net == NULL) { 3820 return (-1); 3821 } 3822 SCTP_INCR_RADDR_COUNT(); 3823 bzero(net, sizeof(struct sctp_nets)); 3824 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3825 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3826 switch (newaddr->sa_family) { 3827 #ifdef INET 3828 case AF_INET: 3829 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3830 break; 3831 #endif 3832 #ifdef INET6 3833 case AF_INET6: 3834 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3835 break; 3836 #endif 3837 default: 3838 break; 3839 } 3840 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3841 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3842 stcb->asoc.scope.loopback_scope = 1; 3843 stcb->asoc.scope.ipv4_local_scope = 1; 3844 stcb->asoc.scope.local_scope = 0; 3845 stcb->asoc.scope.site_scope = 1; 3846 addr_inscope = 1; 3847 } 3848 net->failure_threshold = stcb->asoc.def_net_failure; 3849 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3850 if (addr_inscope == 0) { 3851 net->dest_state = (SCTP_ADDR_REACHABLE | 3852 SCTP_ADDR_OUT_OF_SCOPE); 3853 } else { 3854 if (from == SCTP_ADDR_IS_CONFIRMED) 3855 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3856 net->dest_state = SCTP_ADDR_REACHABLE; 3857 else 3858 net->dest_state = SCTP_ADDR_REACHABLE | 3859 SCTP_ADDR_UNCONFIRMED; 3860 } 3861 /* 3862 * We set this to 0, the timer code knows that this means its an 3863 * initial value 3864 */ 3865 net->rto_needed = 1; 3866 net->RTO = 0; 3867 net->RTO_measured = 0; 3868 stcb->asoc.numnets++; 3869 net->ref_count = 1; 3870 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3871 net->port = stcb->asoc.port; 3872 net->dscp = stcb->asoc.default_dscp; 3873 #ifdef INET6 3874 net->flowlabel = stcb->asoc.default_flowlabel; 3875 #endif 3876 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3877 net->dest_state |= SCTP_ADDR_NOHB; 3878 } else { 3879 net->dest_state &= ~SCTP_ADDR_NOHB; 3880 } 3881 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3882 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3883 } else { 3884 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3885 } 3886 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3887 /* Init the timer structure */ 3888 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3889 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3890 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3891 3892 /* Now generate a route for this guy */ 3893 #ifdef INET6 3894 /* KAME hack: embed scopeid */ 3895 if (newaddr->sa_family == AF_INET6) { 3896 struct sockaddr_in6 *sin6; 3897 3898 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3899 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3900 sin6->sin6_scope_id = 0; 3901 } 3902 #endif 3903 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3904 3905 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3906 /* Get source address */ 3907 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3908 stcb, 3909 (sctp_route_t *) & net->ro, 3910 net, 3911 0, 3912 stcb->asoc.vrf_id); 3913 /* Now get the interface MTU */ 3914 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3915 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3916 } 3917 if (net->mtu > 0) { 3918 uint32_t rmtu; 3919 3920 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3921 if (rmtu == 0) { 3922 /* 3923 * Start things off to match mtu of 3924 * interface please. 3925 */ 3926 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3927 net->ro.ro_rt, net->mtu); 3928 } else { 3929 /* 3930 * we take the route mtu over the interface, 3931 * since the route may be leading out the 3932 * loopback, or a different interface. 3933 */ 3934 net->mtu = rmtu; 3935 } 3936 } 3937 } 3938 if (net->mtu == 0) { 3939 switch (newaddr->sa_family) { 3940 #ifdef INET 3941 case AF_INET: 3942 net->mtu = SCTP_DEFAULT_MTU; 3943 break; 3944 #endif 3945 #ifdef INET6 3946 case AF_INET6: 3947 net->mtu = 1280; 3948 break; 3949 #endif 3950 default: 3951 break; 3952 } 3953 } 3954 if (net->port) { 3955 net->mtu -= (uint32_t) sizeof(struct udphdr); 3956 } 3957 if (from == SCTP_ALLOC_ASOC) { 3958 stcb->asoc.smallest_mtu = net->mtu; 3959 } 3960 if (stcb->asoc.smallest_mtu > net->mtu) { 3961 stcb->asoc.smallest_mtu = net->mtu; 3962 } 3963 #ifdef INET6 3964 if (newaddr->sa_family == AF_INET6) { 3965 struct sockaddr_in6 *sin6; 3966 3967 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3968 (void)sa6_recoverscope(sin6); 3969 } 3970 #endif 3971 3972 /* JRS - Use the congestion control given in the CC module */ 3973 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 3974 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 3975 3976 /* 3977 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3978 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3979 */ 3980 net->find_pseudo_cumack = 1; 3981 net->find_rtx_pseudo_cumack = 1; 3982 net->src_addr_selected = 0; 3983 /* Choose an initial flowid. */ 3984 net->flowid = stcb->asoc.my_vtag ^ 3985 ntohs(stcb->rport) ^ 3986 ntohs(stcb->sctp_ep->sctp_lport); 3987 #ifdef INVARIANTS 3988 net->flowidset = 1; 3989 #endif 3990 if (netp) { 3991 *netp = net; 3992 } 3993 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3994 if (net->ro.ro_rt == NULL) { 3995 /* Since we have no route put it at the back */ 3996 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3997 } else if (netfirst == NULL) { 3998 /* We are the first one in the pool. */ 3999 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4000 } else if (netfirst->ro.ro_rt == NULL) { 4001 /* 4002 * First one has NO route. Place this one ahead of the first 4003 * one. 4004 */ 4005 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4006 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4007 /* 4008 * This one has a different interface than the one at the 4009 * top of the list. Place it ahead. 4010 */ 4011 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4012 } else { 4013 /* 4014 * Ok we have the same interface as the first one. Move 4015 * forward until we find either a) one with a NULL route... 4016 * insert ahead of that b) one with a different ifp.. insert 4017 * after that. c) end of the list.. insert at the tail. 4018 */ 4019 struct sctp_nets *netlook; 4020 4021 do { 4022 netlook = TAILQ_NEXT(netfirst, sctp_next); 4023 if (netlook == NULL) { 4024 /* End of the list */ 4025 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4026 break; 4027 } else if (netlook->ro.ro_rt == NULL) { 4028 /* next one has NO route */ 4029 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4030 break; 4031 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4032 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4033 net, sctp_next); 4034 break; 4035 } 4036 /* Shift forward */ 4037 netfirst = netlook; 4038 } while (netlook != NULL); 4039 } 4040 4041 /* got to have a primary set */ 4042 if (stcb->asoc.primary_destination == 0) { 4043 stcb->asoc.primary_destination = net; 4044 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4045 (net->ro.ro_rt) && 4046 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4047 /* No route to current primary adopt new primary */ 4048 stcb->asoc.primary_destination = net; 4049 } 4050 /* Validate primary is first */ 4051 net = TAILQ_FIRST(&stcb->asoc.nets); 4052 if ((net != stcb->asoc.primary_destination) && 4053 (stcb->asoc.primary_destination)) { 4054 /* 4055 * first one on the list is NOT the primary sctp_cmpaddr() 4056 * is much more efficient if the primary is the first on the 4057 * list, make it so. 4058 */ 4059 TAILQ_REMOVE(&stcb->asoc.nets, 4060 stcb->asoc.primary_destination, sctp_next); 4061 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4062 stcb->asoc.primary_destination, sctp_next); 4063 } 4064 return (0); 4065 } 4066 4067 4068 static uint32_t 4069 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4070 { 4071 uint32_t id; 4072 struct sctpasochead *head; 4073 struct sctp_tcb *lstcb; 4074 4075 SCTP_INP_WLOCK(inp); 4076 try_again: 4077 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4078 /* TSNH */ 4079 SCTP_INP_WUNLOCK(inp); 4080 return (0); 4081 } 4082 /* 4083 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4084 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4085 */ 4086 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4087 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4088 } 4089 id = inp->sctp_associd_counter; 4090 inp->sctp_associd_counter++; 4091 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4092 if (lstcb) { 4093 goto try_again; 4094 } 4095 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4096 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4097 stcb->asoc.in_asocid_hash = 1; 4098 SCTP_INP_WUNLOCK(inp); 4099 return id; 4100 } 4101 4102 /* 4103 * allocate an association and add it to the endpoint. The caller must be 4104 * careful to add all additional addresses once they are know right away or 4105 * else the assoc will be may experience a blackout scenario. 4106 */ 4107 struct sctp_tcb * 4108 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4109 int *error, uint32_t override_tag, uint32_t vrf_id, 4110 struct thread *p 4111 ) 4112 { 4113 /* note the p argument is only valid in unbound sockets */ 4114 4115 struct sctp_tcb *stcb; 4116 struct sctp_association *asoc; 4117 struct sctpasochead *head; 4118 uint16_t rport; 4119 int err; 4120 4121 /* 4122 * Assumption made here: Caller has done a 4123 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4124 * address does not exist already. 4125 */ 4126 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4127 /* Hit max assoc, sorry no more */ 4128 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4129 *error = ENOBUFS; 4130 return (NULL); 4131 } 4132 if (firstaddr == NULL) { 4133 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4134 *error = EINVAL; 4135 return (NULL); 4136 } 4137 SCTP_INP_RLOCK(inp); 4138 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4139 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4140 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4141 /* 4142 * If its in the TCP pool, its NOT allowed to create an 4143 * association. The parent listener needs to call 4144 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4145 * off, or connected one does this.. its an error. 4146 */ 4147 SCTP_INP_RUNLOCK(inp); 4148 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4149 *error = EINVAL; 4150 return (NULL); 4151 } 4152 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4153 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4154 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4155 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4156 SCTP_INP_RUNLOCK(inp); 4157 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4158 *error = EINVAL; 4159 return (NULL); 4160 } 4161 } 4162 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4163 #ifdef SCTP_DEBUG 4164 if (firstaddr) { 4165 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4166 switch (firstaddr->sa_family) { 4167 #ifdef INET 4168 case AF_INET: 4169 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4170 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4171 break; 4172 #endif 4173 #ifdef INET6 4174 case AF_INET6: 4175 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4176 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4177 break; 4178 #endif 4179 default: 4180 break; 4181 } 4182 } else { 4183 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4184 } 4185 #endif /* SCTP_DEBUG */ 4186 switch (firstaddr->sa_family) { 4187 #ifdef INET 4188 case AF_INET: 4189 { 4190 struct sockaddr_in *sin; 4191 4192 sin = (struct sockaddr_in *)firstaddr; 4193 if ((ntohs(sin->sin_port) == 0) || 4194 (sin->sin_addr.s_addr == INADDR_ANY) || 4195 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4196 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4197 /* Invalid address */ 4198 SCTP_INP_RUNLOCK(inp); 4199 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4200 *error = EINVAL; 4201 return (NULL); 4202 } 4203 rport = sin->sin_port; 4204 break; 4205 } 4206 #endif 4207 #ifdef INET6 4208 case AF_INET6: 4209 { 4210 struct sockaddr_in6 *sin6; 4211 4212 sin6 = (struct sockaddr_in6 *)firstaddr; 4213 if ((ntohs(sin6->sin6_port) == 0) || 4214 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4215 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4216 /* Invalid address */ 4217 SCTP_INP_RUNLOCK(inp); 4218 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4219 *error = EINVAL; 4220 return (NULL); 4221 } 4222 rport = sin6->sin6_port; 4223 break; 4224 } 4225 #endif 4226 default: 4227 /* not supported family type */ 4228 SCTP_INP_RUNLOCK(inp); 4229 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4230 *error = EINVAL; 4231 return (NULL); 4232 } 4233 SCTP_INP_RUNLOCK(inp); 4234 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4235 /* 4236 * If you have not performed a bind, then we need to do the 4237 * ephemeral bind for you. 4238 */ 4239 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4240 (struct sockaddr *)NULL, 4241 (struct sctp_ifa *)NULL, 4242 p 4243 ))) { 4244 /* bind error, probably perm */ 4245 *error = err; 4246 return (NULL); 4247 } 4248 } 4249 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4250 if (stcb == NULL) { 4251 /* out of memory? */ 4252 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4253 *error = ENOMEM; 4254 return (NULL); 4255 } 4256 SCTP_INCR_ASOC_COUNT(); 4257 4258 bzero(stcb, sizeof(*stcb)); 4259 asoc = &stcb->asoc; 4260 4261 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4262 SCTP_TCB_LOCK_INIT(stcb); 4263 SCTP_TCB_SEND_LOCK_INIT(stcb); 4264 stcb->rport = rport; 4265 /* setup back pointer's */ 4266 stcb->sctp_ep = inp; 4267 stcb->sctp_socket = inp->sctp_socket; 4268 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4269 /* failed */ 4270 SCTP_TCB_LOCK_DESTROY(stcb); 4271 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4272 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4273 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4274 SCTP_DECR_ASOC_COUNT(); 4275 *error = err; 4276 return (NULL); 4277 } 4278 /* and the port */ 4279 SCTP_INP_INFO_WLOCK(); 4280 SCTP_INP_WLOCK(inp); 4281 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4282 /* inpcb freed while alloc going on */ 4283 SCTP_TCB_LOCK_DESTROY(stcb); 4284 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4285 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4286 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4287 SCTP_INP_WUNLOCK(inp); 4288 SCTP_INP_INFO_WUNLOCK(); 4289 SCTP_DECR_ASOC_COUNT(); 4290 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4291 *error = EINVAL; 4292 return (NULL); 4293 } 4294 SCTP_TCB_LOCK(stcb); 4295 4296 /* now that my_vtag is set, add it to the hash */ 4297 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4298 /* put it in the bucket in the vtag hash of assoc's for the system */ 4299 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4300 SCTP_INP_INFO_WUNLOCK(); 4301 4302 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4303 /* failure.. memory error? */ 4304 if (asoc->strmout) { 4305 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4306 asoc->strmout = NULL; 4307 } 4308 if (asoc->mapping_array) { 4309 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4310 asoc->mapping_array = NULL; 4311 } 4312 if (asoc->nr_mapping_array) { 4313 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4314 asoc->nr_mapping_array = NULL; 4315 } 4316 SCTP_DECR_ASOC_COUNT(); 4317 SCTP_TCB_LOCK_DESTROY(stcb); 4318 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4319 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4320 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4321 SCTP_INP_WUNLOCK(inp); 4322 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4323 *error = ENOBUFS; 4324 return (NULL); 4325 } 4326 /* Init all the timers */ 4327 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4328 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4329 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4330 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4331 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4332 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4333 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4334 4335 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4336 /* now file the port under the hash as well */ 4337 if (inp->sctp_tcbhash != NULL) { 4338 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4339 inp->sctp_hashmark)]; 4340 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4341 } 4342 SCTP_INP_WUNLOCK(inp); 4343 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4344 return (stcb); 4345 } 4346 4347 4348 void 4349 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4350 { 4351 struct sctp_association *asoc; 4352 4353 asoc = &stcb->asoc; 4354 asoc->numnets--; 4355 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4356 if (net == asoc->primary_destination) { 4357 /* Reset primary */ 4358 struct sctp_nets *lnet; 4359 4360 lnet = TAILQ_FIRST(&asoc->nets); 4361 /* 4362 * Mobility adaptation Ideally, if deleted destination is 4363 * the primary, it becomes a fast retransmission trigger by 4364 * the subsequent SET PRIMARY. (by micchie) 4365 */ 4366 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4367 SCTP_MOBILITY_BASE) || 4368 sctp_is_mobility_feature_on(stcb->sctp_ep, 4369 SCTP_MOBILITY_FASTHANDOFF)) { 4370 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4371 if (asoc->deleted_primary != NULL) { 4372 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4373 goto out; 4374 } 4375 asoc->deleted_primary = net; 4376 atomic_add_int(&net->ref_count, 1); 4377 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4378 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4379 sctp_mobility_feature_on(stcb->sctp_ep, 4380 SCTP_MOBILITY_PRIM_DELETED); 4381 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4382 stcb->sctp_ep, stcb, NULL); 4383 } 4384 out: 4385 /* Try to find a confirmed primary */ 4386 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4387 } 4388 if (net == asoc->last_data_chunk_from) { 4389 /* Reset primary */ 4390 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4391 } 4392 if (net == asoc->last_control_chunk_from) { 4393 /* Clear net */ 4394 asoc->last_control_chunk_from = NULL; 4395 } 4396 if (net == stcb->asoc.alternate) { 4397 sctp_free_remote_addr(stcb->asoc.alternate); 4398 stcb->asoc.alternate = NULL; 4399 } 4400 sctp_free_remote_addr(net); 4401 } 4402 4403 /* 4404 * remove a remote endpoint address from an association, it will fail if the 4405 * address does not exist. 4406 */ 4407 int 4408 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4409 { 4410 /* 4411 * Here we need to remove a remote address. This is quite simple, we 4412 * first find it in the list of address for the association 4413 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4414 * on that item. Note we do not allow it to be removed if there are 4415 * no other addresses. 4416 */ 4417 struct sctp_association *asoc; 4418 struct sctp_nets *net, *nnet; 4419 4420 asoc = &stcb->asoc; 4421 4422 /* locate the address */ 4423 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4424 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4425 continue; 4426 } 4427 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4428 remaddr)) { 4429 /* we found the guy */ 4430 if (asoc->numnets < 2) { 4431 /* Must have at LEAST two remote addresses */ 4432 return (-1); 4433 } else { 4434 sctp_remove_net(stcb, net); 4435 return (0); 4436 } 4437 } 4438 } 4439 /* not found. */ 4440 return (-2); 4441 } 4442 4443 void 4444 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4445 { 4446 struct sctpvtaghead *chain; 4447 struct sctp_tagblock *twait_block; 4448 int found = 0; 4449 int i; 4450 4451 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4452 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4453 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4454 if ((twait_block->vtag_block[i].v_tag == tag) && 4455 (twait_block->vtag_block[i].lport == lport) && 4456 (twait_block->vtag_block[i].rport == rport)) { 4457 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4458 twait_block->vtag_block[i].v_tag = 0; 4459 twait_block->vtag_block[i].lport = 0; 4460 twait_block->vtag_block[i].rport = 0; 4461 found = 1; 4462 break; 4463 } 4464 } 4465 if (found) 4466 break; 4467 } 4468 } 4469 4470 int 4471 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4472 { 4473 struct sctpvtaghead *chain; 4474 struct sctp_tagblock *twait_block; 4475 int found = 0; 4476 int i; 4477 4478 SCTP_INP_INFO_WLOCK(); 4479 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 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 SCTP_INP_INFO_WUNLOCK(); 4493 return (found); 4494 } 4495 4496 4497 void 4498 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4499 { 4500 struct sctpvtaghead *chain; 4501 struct sctp_tagblock *twait_block; 4502 struct timeval now; 4503 int set, i; 4504 4505 if (time == 0) { 4506 /* Its disabled */ 4507 return; 4508 } 4509 (void)SCTP_GETTIME_TIMEVAL(&now); 4510 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4511 set = 0; 4512 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4513 /* Block(s) present, lets find space, and expire on the fly */ 4514 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4515 if ((twait_block->vtag_block[i].v_tag == 0) && 4516 !set) { 4517 twait_block->vtag_block[i].tv_sec_at_expire = 4518 now.tv_sec + time; 4519 twait_block->vtag_block[i].v_tag = tag; 4520 twait_block->vtag_block[i].lport = lport; 4521 twait_block->vtag_block[i].rport = rport; 4522 set = 1; 4523 } else if ((twait_block->vtag_block[i].v_tag) && 4524 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4525 /* Audit expires this guy */ 4526 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4527 twait_block->vtag_block[i].v_tag = 0; 4528 twait_block->vtag_block[i].lport = 0; 4529 twait_block->vtag_block[i].rport = 0; 4530 if (set == 0) { 4531 /* Reuse it for my new tag */ 4532 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4533 twait_block->vtag_block[i].v_tag = tag; 4534 twait_block->vtag_block[i].lport = lport; 4535 twait_block->vtag_block[i].rport = rport; 4536 set = 1; 4537 } 4538 } 4539 } 4540 if (set) { 4541 /* 4542 * We only do up to the block where we can place our 4543 * tag for audits 4544 */ 4545 break; 4546 } 4547 } 4548 /* Need to add a new block to chain */ 4549 if (!set) { 4550 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4551 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4552 if (twait_block == NULL) { 4553 #ifdef INVARIANTS 4554 panic("Can not alloc tagblock"); 4555 #endif 4556 return; 4557 } 4558 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4559 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4560 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4561 twait_block->vtag_block[0].v_tag = tag; 4562 twait_block->vtag_block[0].lport = lport; 4563 twait_block->vtag_block[0].rport = rport; 4564 } 4565 } 4566 4567 4568 4569 /*- 4570 * Free the association after un-hashing the remote port. This 4571 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4572 * expect that the input to this function IS a locked TCB. 4573 * It will return 0, if it did NOT destroy the association (instead 4574 * it unlocks it. It will return NON-zero if it either destroyed the 4575 * association OR the association is already destroyed. 4576 */ 4577 int 4578 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4579 { 4580 int i; 4581 struct sctp_association *asoc; 4582 struct sctp_nets *net, *nnet; 4583 struct sctp_laddr *laddr, *naddr; 4584 struct sctp_tmit_chunk *chk, *nchk; 4585 struct sctp_asconf_addr *aparam, *naparam; 4586 struct sctp_asconf_ack *aack, *naack; 4587 struct sctp_stream_reset_list *strrst, *nstrrst; 4588 struct sctp_queued_to_read *sq, *nsq; 4589 struct sctp_stream_queue_pending *sp, *nsp; 4590 sctp_sharedkey_t *shared_key, *nshared_key; 4591 struct socket *so; 4592 4593 /* first, lets purge the entry from the hash table. */ 4594 4595 #ifdef SCTP_LOG_CLOSING 4596 sctp_log_closing(inp, stcb, 6); 4597 #endif 4598 if (stcb->asoc.state == 0) { 4599 #ifdef SCTP_LOG_CLOSING 4600 sctp_log_closing(inp, NULL, 7); 4601 #endif 4602 /* there is no asoc, really TSNH :-0 */ 4603 return (1); 4604 } 4605 if (stcb->asoc.alternate) { 4606 sctp_free_remote_addr(stcb->asoc.alternate); 4607 stcb->asoc.alternate = NULL; 4608 } 4609 /* TEMP CODE */ 4610 if (stcb->freed_from_where == 0) { 4611 /* Only record the first place free happened from */ 4612 stcb->freed_from_where = from_location; 4613 } 4614 /* TEMP CODE */ 4615 4616 asoc = &stcb->asoc; 4617 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4618 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4619 /* nothing around */ 4620 so = NULL; 4621 else 4622 so = inp->sctp_socket; 4623 4624 /* 4625 * We used timer based freeing if a reader or writer is in the way. 4626 * So we first check if we are actually being called from a timer, 4627 * if so we abort early if a reader or writer is still in the way. 4628 */ 4629 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4630 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4631 /* 4632 * is it the timer driving us? if so are the reader/writers 4633 * gone? 4634 */ 4635 if (stcb->asoc.refcnt) { 4636 /* nope, reader or writer in the way */ 4637 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4638 /* no asoc destroyed */ 4639 SCTP_TCB_UNLOCK(stcb); 4640 #ifdef SCTP_LOG_CLOSING 4641 sctp_log_closing(inp, stcb, 8); 4642 #endif 4643 return (0); 4644 } 4645 } 4646 /* now clean up any other timers */ 4647 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4648 asoc->dack_timer.self = NULL; 4649 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4650 /*- 4651 * For stream reset we don't blast this unless 4652 * it is a str-reset timer, it might be the 4653 * free-asoc timer which we DON'T want to 4654 * disturb. 4655 */ 4656 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4657 asoc->strreset_timer.self = NULL; 4658 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4659 asoc->asconf_timer.self = NULL; 4660 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4661 asoc->autoclose_timer.self = NULL; 4662 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4663 asoc->shut_guard_timer.self = NULL; 4664 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4665 asoc->delayed_event_timer.self = NULL; 4666 /* Mobility adaptation */ 4667 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4668 asoc->delete_prim_timer.self = NULL; 4669 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4670 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4671 net->rxt_timer.self = NULL; 4672 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4673 net->pmtu_timer.self = NULL; 4674 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4675 net->hb_timer.self = NULL; 4676 } 4677 /* Now the read queue needs to be cleaned up (only once) */ 4678 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4679 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4680 SCTP_INP_READ_LOCK(inp); 4681 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4682 if (sq->stcb == stcb) { 4683 sq->do_not_ref_stcb = 1; 4684 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4685 /* 4686 * If there is no end, there never will be 4687 * now. 4688 */ 4689 if (sq->end_added == 0) { 4690 /* Held for PD-API clear that. */ 4691 sq->pdapi_aborted = 1; 4692 sq->held_length = 0; 4693 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4694 /* 4695 * Need to add a PD-API 4696 * aborted indication. 4697 * Setting the control_pdapi 4698 * assures that it will be 4699 * added right after this 4700 * msg. 4701 */ 4702 uint32_t strseq; 4703 4704 stcb->asoc.control_pdapi = sq; 4705 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4706 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4707 stcb, 4708 SCTP_PARTIAL_DELIVERY_ABORTED, 4709 (void *)&strseq, 4710 SCTP_SO_LOCKED); 4711 stcb->asoc.control_pdapi = NULL; 4712 } 4713 } 4714 /* Add an end to wake them */ 4715 sq->end_added = 1; 4716 } 4717 } 4718 SCTP_INP_READ_UNLOCK(inp); 4719 if (stcb->block_entry) { 4720 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4721 stcb->block_entry->error = ECONNRESET; 4722 stcb->block_entry = NULL; 4723 } 4724 } 4725 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4726 /* 4727 * Someone holds a reference OR the socket is unaccepted 4728 * yet. 4729 */ 4730 if ((stcb->asoc.refcnt) || 4731 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4732 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4733 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4734 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4735 } 4736 SCTP_TCB_UNLOCK(stcb); 4737 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4738 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4739 /* nothing around */ 4740 so = NULL; 4741 if (so) { 4742 /* Wake any reader/writers */ 4743 sctp_sorwakeup(inp, so); 4744 sctp_sowwakeup(inp, so); 4745 } 4746 #ifdef SCTP_LOG_CLOSING 4747 sctp_log_closing(inp, stcb, 9); 4748 #endif 4749 /* no asoc destroyed */ 4750 return (0); 4751 } 4752 #ifdef SCTP_LOG_CLOSING 4753 sctp_log_closing(inp, stcb, 10); 4754 #endif 4755 /* 4756 * When I reach here, no others want to kill the assoc yet.. and I 4757 * own the lock. Now its possible an abort comes in when I do the 4758 * lock exchange below to grab all the locks to do the final take 4759 * out. to prevent this we increment the count, which will start a 4760 * timer and blow out above thus assuring us that we hold exclusive 4761 * killing of the asoc. Note that after getting back the TCB lock we 4762 * will go ahead and increment the counter back up and stop any 4763 * timer a passing stranger may have started :-S 4764 */ 4765 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4766 atomic_add_int(&stcb->asoc.refcnt, 1); 4767 4768 SCTP_TCB_UNLOCK(stcb); 4769 SCTP_INP_INFO_WLOCK(); 4770 SCTP_INP_WLOCK(inp); 4771 SCTP_TCB_LOCK(stcb); 4772 } 4773 /* Double check the GONE flag */ 4774 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4775 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4776 /* nothing around */ 4777 so = NULL; 4778 4779 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4780 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4781 /* 4782 * For TCP type we need special handling when we are 4783 * connected. We also include the peel'ed off ones to. 4784 */ 4785 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4786 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4787 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4788 if (so) { 4789 SOCK_LOCK(so); 4790 if (so->so_rcv.sb_cc == 0) { 4791 so->so_state &= ~(SS_ISCONNECTING | 4792 SS_ISDISCONNECTING | 4793 SS_ISCONFIRMING | 4794 SS_ISCONNECTED); 4795 } 4796 socantrcvmore_locked(so); 4797 sctp_sowwakeup(inp, so); 4798 sctp_sorwakeup(inp, so); 4799 SCTP_SOWAKEUP(so); 4800 } 4801 } 4802 } 4803 /* 4804 * Make it invalid too, that way if its about to run it will abort 4805 * and return. 4806 */ 4807 /* re-increment the lock */ 4808 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4809 atomic_add_int(&stcb->asoc.refcnt, -1); 4810 } 4811 if (stcb->asoc.refcnt) { 4812 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4813 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4814 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4815 SCTP_INP_INFO_WUNLOCK(); 4816 SCTP_INP_WUNLOCK(inp); 4817 } 4818 SCTP_TCB_UNLOCK(stcb); 4819 return (0); 4820 } 4821 asoc->state = 0; 4822 if (inp->sctp_tcbhash) { 4823 LIST_REMOVE(stcb, sctp_tcbhash); 4824 } 4825 if (stcb->asoc.in_asocid_hash) { 4826 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4827 } 4828 /* Now lets remove it from the list of ALL associations in the EP */ 4829 LIST_REMOVE(stcb, sctp_tcblist); 4830 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4831 SCTP_INP_INCR_REF(inp); 4832 SCTP_INP_WUNLOCK(inp); 4833 } 4834 /* pull from vtag hash */ 4835 LIST_REMOVE(stcb, sctp_asocs); 4836 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4837 inp->sctp_lport, stcb->rport); 4838 4839 /* 4840 * Now restop the timers to be sure this is paranoia at is finest! 4841 */ 4842 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4843 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4844 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4845 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4846 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4847 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4848 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4849 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4850 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4851 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4852 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4853 } 4854 4855 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4856 /* 4857 * The chunk lists and such SHOULD be empty but we check them just 4858 * in case. 4859 */ 4860 /* anything on the wheel needs to be removed */ 4861 for (i = 0; i < asoc->streamoutcnt; i++) { 4862 struct sctp_stream_out *outs; 4863 4864 outs = &asoc->strmout[i]; 4865 /* now clean up any chunks here */ 4866 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4867 TAILQ_REMOVE(&outs->outqueue, sp, next); 4868 sctp_free_spbufspace(stcb, asoc, sp); 4869 if (sp->data) { 4870 if (so) { 4871 /* Still an open socket - report */ 4872 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4873 0, (void *)sp, SCTP_SO_LOCKED); 4874 } 4875 if (sp->data) { 4876 sctp_m_freem(sp->data); 4877 sp->data = NULL; 4878 sp->tail_mbuf = NULL; 4879 sp->length = 0; 4880 } 4881 } 4882 if (sp->net) { 4883 sctp_free_remote_addr(sp->net); 4884 sp->net = NULL; 4885 } 4886 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4887 } 4888 } 4889 /* sa_ignore FREED_MEMORY */ 4890 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4891 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4892 SCTP_FREE(strrst, SCTP_M_STRESET); 4893 } 4894 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4895 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4896 if (sq->data) { 4897 sctp_m_freem(sq->data); 4898 sq->data = NULL; 4899 } 4900 sctp_free_remote_addr(sq->whoFrom); 4901 sq->whoFrom = NULL; 4902 sq->stcb = NULL; 4903 /* Free the ctl entry */ 4904 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4905 SCTP_DECR_READQ_COUNT(); 4906 /* sa_ignore FREED_MEMORY */ 4907 } 4908 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4909 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4910 if (chk->data) { 4911 sctp_m_freem(chk->data); 4912 chk->data = NULL; 4913 } 4914 if (chk->holds_key_ref) 4915 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4916 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4917 SCTP_DECR_CHK_COUNT(); 4918 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4919 asoc->free_chunk_cnt--; 4920 /* sa_ignore FREED_MEMORY */ 4921 } 4922 /* pending send queue SHOULD be empty */ 4923 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4924 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4925 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4926 #ifdef INVARIANTS 4927 } else { 4928 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4929 #endif 4930 } 4931 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4932 if (chk->data) { 4933 if (so) { 4934 /* Still a socket? */ 4935 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4936 0, chk, SCTP_SO_LOCKED); 4937 } 4938 if (chk->data) { 4939 sctp_m_freem(chk->data); 4940 chk->data = NULL; 4941 } 4942 } 4943 if (chk->holds_key_ref) 4944 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4945 if (chk->whoTo) { 4946 sctp_free_remote_addr(chk->whoTo); 4947 chk->whoTo = NULL; 4948 } 4949 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4950 SCTP_DECR_CHK_COUNT(); 4951 /* sa_ignore FREED_MEMORY */ 4952 } 4953 /* sent queue SHOULD be empty */ 4954 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4955 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 4956 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4957 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4958 #ifdef INVARIANTS 4959 } else { 4960 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4961 #endif 4962 } 4963 } 4964 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4965 if (chk->data) { 4966 if (so) { 4967 /* Still a socket? */ 4968 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 4969 0, chk, SCTP_SO_LOCKED); 4970 } 4971 if (chk->data) { 4972 sctp_m_freem(chk->data); 4973 chk->data = NULL; 4974 } 4975 } 4976 if (chk->holds_key_ref) 4977 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4978 sctp_free_remote_addr(chk->whoTo); 4979 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4980 SCTP_DECR_CHK_COUNT(); 4981 /* sa_ignore FREED_MEMORY */ 4982 } 4983 #ifdef INVARIANTS 4984 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 4985 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 4986 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 4987 } 4988 } 4989 #endif 4990 /* control queue MAY not be empty */ 4991 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 4992 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4993 if (chk->data) { 4994 sctp_m_freem(chk->data); 4995 chk->data = NULL; 4996 } 4997 if (chk->holds_key_ref) 4998 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4999 sctp_free_remote_addr(chk->whoTo); 5000 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5001 SCTP_DECR_CHK_COUNT(); 5002 /* sa_ignore FREED_MEMORY */ 5003 } 5004 /* ASCONF queue MAY not be empty */ 5005 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5006 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5007 if (chk->data) { 5008 sctp_m_freem(chk->data); 5009 chk->data = NULL; 5010 } 5011 if (chk->holds_key_ref) 5012 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5013 sctp_free_remote_addr(chk->whoTo); 5014 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5015 SCTP_DECR_CHK_COUNT(); 5016 /* sa_ignore FREED_MEMORY */ 5017 } 5018 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5019 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5020 if (chk->data) { 5021 sctp_m_freem(chk->data); 5022 chk->data = NULL; 5023 } 5024 if (chk->holds_key_ref) 5025 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5026 sctp_free_remote_addr(chk->whoTo); 5027 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5028 SCTP_DECR_CHK_COUNT(); 5029 /* sa_ignore FREED_MEMORY */ 5030 } 5031 5032 if (asoc->mapping_array) { 5033 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5034 asoc->mapping_array = NULL; 5035 } 5036 if (asoc->nr_mapping_array) { 5037 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5038 asoc->nr_mapping_array = NULL; 5039 } 5040 /* the stream outs */ 5041 if (asoc->strmout) { 5042 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5043 asoc->strmout = NULL; 5044 } 5045 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5046 if (asoc->strmin) { 5047 struct sctp_queued_to_read *ctl, *nctl; 5048 5049 for (i = 0; i < asoc->streamincnt; i++) { 5050 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5051 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5052 sctp_free_remote_addr(ctl->whoFrom); 5053 if (ctl->data) { 5054 sctp_m_freem(ctl->data); 5055 ctl->data = NULL; 5056 } 5057 /* 5058 * We don't free the address here since all 5059 * the net's were freed above. 5060 */ 5061 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5062 SCTP_DECR_READQ_COUNT(); 5063 } 5064 } 5065 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5066 asoc->strmin = NULL; 5067 } 5068 asoc->streamincnt = 0; 5069 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5070 #ifdef INVARIANTS 5071 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5072 panic("no net's left alloc'ed, or list points to itself"); 5073 } 5074 #endif 5075 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5076 sctp_free_remote_addr(net); 5077 } 5078 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5079 /* sa_ignore FREED_MEMORY */ 5080 sctp_remove_laddr(laddr); 5081 } 5082 5083 /* pending asconf (address) parameters */ 5084 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5085 /* sa_ignore FREED_MEMORY */ 5086 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5087 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5088 } 5089 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5090 /* sa_ignore FREED_MEMORY */ 5091 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5092 if (aack->data != NULL) { 5093 sctp_m_freem(aack->data); 5094 } 5095 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5096 } 5097 /* clean up auth stuff */ 5098 if (asoc->local_hmacs) 5099 sctp_free_hmaclist(asoc->local_hmacs); 5100 if (asoc->peer_hmacs) 5101 sctp_free_hmaclist(asoc->peer_hmacs); 5102 5103 if (asoc->local_auth_chunks) 5104 sctp_free_chunklist(asoc->local_auth_chunks); 5105 if (asoc->peer_auth_chunks) 5106 sctp_free_chunklist(asoc->peer_auth_chunks); 5107 5108 sctp_free_authinfo(&asoc->authinfo); 5109 5110 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5111 LIST_REMOVE(shared_key, next); 5112 sctp_free_sharedkey(shared_key); 5113 /* sa_ignore FREED_MEMORY */ 5114 } 5115 5116 /* Insert new items here :> */ 5117 5118 /* Get rid of LOCK */ 5119 SCTP_TCB_LOCK_DESTROY(stcb); 5120 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5121 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5122 SCTP_INP_INFO_WUNLOCK(); 5123 SCTP_INP_RLOCK(inp); 5124 } 5125 #ifdef SCTP_TRACK_FREED_ASOCS 5126 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5127 /* now clean up the tasoc itself */ 5128 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5129 SCTP_DECR_ASOC_COUNT(); 5130 } else { 5131 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5132 } 5133 #else 5134 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5135 SCTP_DECR_ASOC_COUNT(); 5136 #endif 5137 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5138 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5139 /* 5140 * If its NOT the inp_free calling us AND sctp_close 5141 * as been called, we call back... 5142 */ 5143 SCTP_INP_RUNLOCK(inp); 5144 /* 5145 * This will start the kill timer (if we are the 5146 * last one) since we hold an increment yet. But 5147 * this is the only safe way to do this since 5148 * otherwise if the socket closes at the same time 5149 * we are here we might collide in the cleanup. 5150 */ 5151 sctp_inpcb_free(inp, 5152 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5153 SCTP_CALLED_DIRECTLY_NOCMPSET); 5154 SCTP_INP_DECR_REF(inp); 5155 goto out_of; 5156 } else { 5157 /* The socket is still open. */ 5158 SCTP_INP_DECR_REF(inp); 5159 } 5160 } 5161 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5162 SCTP_INP_RUNLOCK(inp); 5163 } 5164 out_of: 5165 /* destroyed the asoc */ 5166 #ifdef SCTP_LOG_CLOSING 5167 sctp_log_closing(inp, NULL, 11); 5168 #endif 5169 return (1); 5170 } 5171 5172 5173 5174 /* 5175 * determine if a destination is "reachable" based upon the addresses bound 5176 * to the current endpoint (e.g. only v4 or v6 currently bound) 5177 */ 5178 /* 5179 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5180 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5181 * types bound as its endpoint 5182 */ 5183 int 5184 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5185 { 5186 struct sctp_inpcb *inp; 5187 int answer; 5188 5189 /* 5190 * No locks here, the TCB, in all cases is already locked and an 5191 * assoc is up. There is either a INP lock by the caller applied (in 5192 * asconf case when deleting an address) or NOT in the HB case, 5193 * however if HB then the INP increment is up and the INP will not 5194 * be removed (on top of the fact that we have a TCB lock). So we 5195 * only want to read the sctp_flags, which is either bound-all or 5196 * not.. no protection needed since once an assoc is up you can't be 5197 * changing your binding. 5198 */ 5199 inp = stcb->sctp_ep; 5200 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5201 /* if bound all, destination is not restricted */ 5202 /* 5203 * RRS: Question during lock work: Is this correct? If you 5204 * are bound-all you still might need to obey the V4--V6 5205 * flags??? IMO this bound-all stuff needs to be removed! 5206 */ 5207 return (1); 5208 } 5209 /* NOTE: all "scope" checks are done when local addresses are added */ 5210 switch (destaddr->sa_family) { 5211 #ifdef INET6 5212 case AF_INET6: 5213 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5214 break; 5215 #endif 5216 #ifdef INET 5217 case AF_INET: 5218 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5219 break; 5220 #endif 5221 default: 5222 /* invalid family, so it's unreachable */ 5223 answer = 0; 5224 break; 5225 } 5226 return (answer); 5227 } 5228 5229 /* 5230 * update the inp_vflags on an endpoint 5231 */ 5232 static void 5233 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5234 { 5235 struct sctp_laddr *laddr; 5236 5237 /* first clear the flag */ 5238 inp->ip_inp.inp.inp_vflag = 0; 5239 /* set the flag based on addresses on the ep list */ 5240 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5241 if (laddr->ifa == NULL) { 5242 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5243 __FUNCTION__); 5244 continue; 5245 } 5246 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5247 continue; 5248 } 5249 switch (laddr->ifa->address.sa.sa_family) { 5250 #ifdef INET6 5251 case AF_INET6: 5252 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5253 break; 5254 #endif 5255 #ifdef INET 5256 case AF_INET: 5257 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5258 break; 5259 #endif 5260 default: 5261 break; 5262 } 5263 } 5264 } 5265 5266 /* 5267 * Add the address to the endpoint local address list There is nothing to be 5268 * done if we are bound to all addresses 5269 */ 5270 void 5271 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5272 { 5273 struct sctp_laddr *laddr; 5274 int fnd, error = 0; 5275 5276 fnd = 0; 5277 5278 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5279 /* You are already bound to all. You have it already */ 5280 return; 5281 } 5282 #ifdef INET6 5283 if (ifa->address.sa.sa_family == AF_INET6) { 5284 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5285 /* Can't bind a non-useable addr. */ 5286 return; 5287 } 5288 } 5289 #endif 5290 /* first, is it already present? */ 5291 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5292 if (laddr->ifa == ifa) { 5293 fnd = 1; 5294 break; 5295 } 5296 } 5297 5298 if (fnd == 0) { 5299 /* Not in the ep list */ 5300 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5301 if (error != 0) 5302 return; 5303 inp->laddr_count++; 5304 /* update inp_vflag flags */ 5305 switch (ifa->address.sa.sa_family) { 5306 #ifdef INET6 5307 case AF_INET6: 5308 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5309 break; 5310 #endif 5311 #ifdef INET 5312 case AF_INET: 5313 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5314 break; 5315 #endif 5316 default: 5317 break; 5318 } 5319 } 5320 return; 5321 } 5322 5323 5324 /* 5325 * select a new (hopefully reachable) destination net (should only be used 5326 * when we deleted an ep addr that is the only usable source address to reach 5327 * the destination net) 5328 */ 5329 static void 5330 sctp_select_primary_destination(struct sctp_tcb *stcb) 5331 { 5332 struct sctp_nets *net; 5333 5334 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5335 /* for now, we'll just pick the first reachable one we find */ 5336 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5337 continue; 5338 if (sctp_destination_is_reachable(stcb, 5339 (struct sockaddr *)&net->ro._l_addr)) { 5340 /* found a reachable destination */ 5341 stcb->asoc.primary_destination = net; 5342 } 5343 } 5344 /* I can't there from here! ...we're gonna die shortly... */ 5345 } 5346 5347 5348 /* 5349 * Delete the address from the endpoint local address list There is nothing 5350 * to be done if we are bound to all addresses 5351 */ 5352 void 5353 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5354 { 5355 struct sctp_laddr *laddr; 5356 int fnd; 5357 5358 fnd = 0; 5359 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5360 /* You are already bound to all. You have it already */ 5361 return; 5362 } 5363 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5364 if (laddr->ifa == ifa) { 5365 fnd = 1; 5366 break; 5367 } 5368 } 5369 if (fnd && (inp->laddr_count < 2)) { 5370 /* can't delete unless there are at LEAST 2 addresses */ 5371 return; 5372 } 5373 if (fnd) { 5374 /* 5375 * clean up any use of this address go through our 5376 * associations and clear any last_used_address that match 5377 * this one for each assoc, see if a new primary_destination 5378 * is needed 5379 */ 5380 struct sctp_tcb *stcb; 5381 5382 /* clean up "next_addr_touse" */ 5383 if (inp->next_addr_touse == laddr) 5384 /* delete this address */ 5385 inp->next_addr_touse = NULL; 5386 5387 /* clean up "last_used_address" */ 5388 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5389 struct sctp_nets *net; 5390 5391 SCTP_TCB_LOCK(stcb); 5392 if (stcb->asoc.last_used_address == laddr) 5393 /* delete this address */ 5394 stcb->asoc.last_used_address = NULL; 5395 /* 5396 * Now spin through all the nets and purge any ref 5397 * to laddr 5398 */ 5399 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5400 if (net->ro._s_addr && 5401 (net->ro._s_addr->ifa == laddr->ifa)) { 5402 /* Yep, purge src address selected */ 5403 sctp_rtentry_t *rt; 5404 5405 /* delete this address if cached */ 5406 rt = net->ro.ro_rt; 5407 if (rt != NULL) { 5408 RTFREE(rt); 5409 net->ro.ro_rt = NULL; 5410 } 5411 sctp_free_ifa(net->ro._s_addr); 5412 net->ro._s_addr = NULL; 5413 net->src_addr_selected = 0; 5414 } 5415 } 5416 SCTP_TCB_UNLOCK(stcb); 5417 } /* for each tcb */ 5418 /* remove it from the ep list */ 5419 sctp_remove_laddr(laddr); 5420 inp->laddr_count--; 5421 /* update inp_vflag flags */ 5422 sctp_update_ep_vflag(inp); 5423 } 5424 return; 5425 } 5426 5427 /* 5428 * Add the address to the TCB local address restricted list. 5429 * This is a "pending" address list (eg. addresses waiting for an 5430 * ASCONF-ACK response) and cannot be used as a valid source address. 5431 */ 5432 void 5433 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5434 { 5435 struct sctp_laddr *laddr; 5436 struct sctpladdr *list; 5437 5438 /* 5439 * Assumes TCB is locked.. and possibly the INP. May need to 5440 * confirm/fix that if we need it and is not the case. 5441 */ 5442 list = &stcb->asoc.sctp_restricted_addrs; 5443 5444 #ifdef INET6 5445 if (ifa->address.sa.sa_family == AF_INET6) { 5446 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5447 /* Can't bind a non-existent addr. */ 5448 return; 5449 } 5450 } 5451 #endif 5452 /* does the address already exist? */ 5453 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5454 if (laddr->ifa == ifa) { 5455 return; 5456 } 5457 } 5458 5459 /* add to the list */ 5460 (void)sctp_insert_laddr(list, ifa, 0); 5461 return; 5462 } 5463 5464 /* 5465 * insert an laddr entry with the given ifa for the desired list 5466 */ 5467 int 5468 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5469 { 5470 struct sctp_laddr *laddr; 5471 5472 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5473 if (laddr == NULL) { 5474 /* out of memory? */ 5475 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5476 return (EINVAL); 5477 } 5478 SCTP_INCR_LADDR_COUNT(); 5479 bzero(laddr, sizeof(*laddr)); 5480 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5481 laddr->ifa = ifa; 5482 laddr->action = act; 5483 atomic_add_int(&ifa->refcount, 1); 5484 /* insert it */ 5485 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5486 5487 return (0); 5488 } 5489 5490 /* 5491 * Remove an laddr entry from the local address list (on an assoc) 5492 */ 5493 void 5494 sctp_remove_laddr(struct sctp_laddr *laddr) 5495 { 5496 5497 /* remove from the list */ 5498 LIST_REMOVE(laddr, sctp_nxt_addr); 5499 sctp_free_ifa(laddr->ifa); 5500 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5501 SCTP_DECR_LADDR_COUNT(); 5502 } 5503 5504 /* 5505 * Remove a local address from the TCB local address restricted list 5506 */ 5507 void 5508 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5509 { 5510 struct sctp_inpcb *inp; 5511 struct sctp_laddr *laddr; 5512 5513 /* 5514 * This is called by asconf work. It is assumed that a) The TCB is 5515 * locked and b) The INP is locked. This is true in as much as I can 5516 * trace through the entry asconf code where I did these locks. 5517 * Again, the ASCONF code is a bit different in that it does lock 5518 * the INP during its work often times. This must be since we don't 5519 * want other proc's looking up things while what they are looking 5520 * up is changing :-D 5521 */ 5522 5523 inp = stcb->sctp_ep; 5524 /* if subset bound and don't allow ASCONF's, can't delete last */ 5525 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5526 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5527 if (stcb->sctp_ep->laddr_count < 2) { 5528 /* can't delete last address */ 5529 return; 5530 } 5531 } 5532 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5533 /* remove the address if it exists */ 5534 if (laddr->ifa == NULL) 5535 continue; 5536 if (laddr->ifa == ifa) { 5537 sctp_remove_laddr(laddr); 5538 return; 5539 } 5540 } 5541 5542 /* address not found! */ 5543 return; 5544 } 5545 5546 /* 5547 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5548 */ 5549 /* sysctl */ 5550 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5551 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5552 5553 5554 5555 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5556 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5557 int *sctp_cpuarry = NULL; 5558 void 5559 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5560 { 5561 /* Queue a packet to a processor for the specified core */ 5562 struct sctp_mcore_queue *qent; 5563 struct sctp_mcore_ctrl *wkq; 5564 int need_wake = 0; 5565 5566 if (sctp_mcore_workers == NULL) { 5567 /* Something went way bad during setup */ 5568 sctp_input_with_port(m, off, 0); 5569 return; 5570 } 5571 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5572 (sizeof(struct sctp_mcore_queue)), 5573 SCTP_M_MCORE); 5574 if (qent == NULL) { 5575 /* This is trouble */ 5576 sctp_input_with_port(m, off, 0); 5577 return; 5578 } 5579 qent->vn = curvnet; 5580 qent->m = m; 5581 qent->off = off; 5582 qent->v6 = 0; 5583 wkq = &sctp_mcore_workers[cpu_to_use]; 5584 SCTP_MCORE_QLOCK(wkq); 5585 5586 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5587 if (wkq->running == 0) { 5588 need_wake = 1; 5589 } 5590 SCTP_MCORE_QUNLOCK(wkq); 5591 if (need_wake) { 5592 wakeup(&wkq->running); 5593 } 5594 } 5595 5596 static void 5597 sctp_mcore_thread(void *arg) 5598 { 5599 5600 struct sctp_mcore_ctrl *wkq; 5601 struct sctp_mcore_queue *qent; 5602 5603 wkq = (struct sctp_mcore_ctrl *)arg; 5604 struct mbuf *m; 5605 int off, v6; 5606 5607 /* Wait for first tickle */ 5608 SCTP_MCORE_LOCK(wkq); 5609 wkq->running = 0; 5610 msleep(&wkq->running, 5611 &wkq->core_mtx, 5612 0, "wait for pkt", 0); 5613 SCTP_MCORE_UNLOCK(wkq); 5614 5615 /* Bind to our cpu */ 5616 thread_lock(curthread); 5617 sched_bind(curthread, wkq->cpuid); 5618 thread_unlock(curthread); 5619 5620 /* Now lets start working */ 5621 SCTP_MCORE_LOCK(wkq); 5622 /* Now grab lock and go */ 5623 for (;;) { 5624 SCTP_MCORE_QLOCK(wkq); 5625 skip_sleep: 5626 wkq->running = 1; 5627 qent = TAILQ_FIRST(&wkq->que); 5628 if (qent) { 5629 TAILQ_REMOVE(&wkq->que, qent, next); 5630 SCTP_MCORE_QUNLOCK(wkq); 5631 CURVNET_SET(qent->vn); 5632 m = qent->m; 5633 off = qent->off; 5634 v6 = qent->v6; 5635 SCTP_FREE(qent, SCTP_M_MCORE); 5636 if (v6 == 0) { 5637 sctp_input_with_port(m, off, 0); 5638 } else { 5639 SCTP_PRINTF("V6 not yet supported\n"); 5640 sctp_m_freem(m); 5641 } 5642 CURVNET_RESTORE(); 5643 SCTP_MCORE_QLOCK(wkq); 5644 } 5645 wkq->running = 0; 5646 if (!TAILQ_EMPTY(&wkq->que)) { 5647 goto skip_sleep; 5648 } 5649 SCTP_MCORE_QUNLOCK(wkq); 5650 msleep(&wkq->running, 5651 &wkq->core_mtx, 5652 0, "wait for pkt", 0); 5653 } 5654 } 5655 5656 static void 5657 sctp_startup_mcore_threads(void) 5658 { 5659 int i, cpu; 5660 5661 if (mp_ncpus == 1) 5662 return; 5663 5664 if (sctp_mcore_workers != NULL) { 5665 /* 5666 * Already been here in some previous vnet? 5667 */ 5668 return; 5669 } 5670 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5671 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5672 SCTP_M_MCORE); 5673 if (sctp_mcore_workers == NULL) { 5674 /* TSNH I hope */ 5675 return; 5676 } 5677 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5678 sizeof(struct sctp_mcore_ctrl))); 5679 /* Init the structures */ 5680 for (i = 0; i <= mp_maxid; i++) { 5681 TAILQ_INIT(&sctp_mcore_workers[i].que); 5682 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5683 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5684 sctp_mcore_workers[i].cpuid = i; 5685 } 5686 if (sctp_cpuarry == NULL) { 5687 SCTP_MALLOC(sctp_cpuarry, int *, 5688 (mp_ncpus * sizeof(int)), 5689 SCTP_M_MCORE); 5690 i = 0; 5691 CPU_FOREACH(cpu) { 5692 sctp_cpuarry[i] = cpu; 5693 i++; 5694 } 5695 } 5696 /* Now start them all */ 5697 CPU_FOREACH(cpu) { 5698 (void)kproc_create(sctp_mcore_thread, 5699 (void *)&sctp_mcore_workers[cpu], 5700 &sctp_mcore_workers[cpu].thread_proc, 5701 RFPROC, 5702 SCTP_KTHREAD_PAGES, 5703 SCTP_MCORE_NAME); 5704 5705 } 5706 } 5707 5708 #endif 5709 5710 void 5711 sctp_pcb_init() 5712 { 5713 /* 5714 * SCTP initialization for the PCB structures should be called by 5715 * the sctp_init() funciton. 5716 */ 5717 int i; 5718 struct timeval tv; 5719 5720 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5721 /* error I was called twice */ 5722 return; 5723 } 5724 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5725 5726 #if defined(SCTP_LOCAL_TRACE_BUF) 5727 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5728 #endif 5729 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5730 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5731 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5732 SCTP_M_MCORE); 5733 #endif 5734 (void)SCTP_GETTIME_TIMEVAL(&tv); 5735 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5736 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5737 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5738 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5739 #else 5740 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5741 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5742 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5743 #endif 5744 /* init the empty list of (All) Endpoints */ 5745 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5746 5747 5748 /* init the hash table of endpoints */ 5749 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5750 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5751 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5752 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5753 &SCTP_BASE_INFO(hashasocmark)); 5754 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5755 &SCTP_BASE_INFO(hashmark)); 5756 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5757 &SCTP_BASE_INFO(hashtcpmark)); 5758 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5759 5760 5761 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5762 &SCTP_BASE_INFO(hashvrfmark)); 5763 5764 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5765 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5766 /* init the zones */ 5767 /* 5768 * FIX ME: Should check for NULL returns, but if it does fail we are 5769 * doomed to panic anyways... add later maybe. 5770 */ 5771 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5772 sizeof(struct sctp_inpcb), maxsockets); 5773 5774 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5775 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5776 5777 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5778 sizeof(struct sctp_laddr), 5779 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5780 5781 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5782 sizeof(struct sctp_nets), 5783 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5784 5785 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5786 sizeof(struct sctp_tmit_chunk), 5787 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5788 5789 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5790 sizeof(struct sctp_queued_to_read), 5791 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5792 5793 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5794 sizeof(struct sctp_stream_queue_pending), 5795 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5796 5797 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5798 sizeof(struct sctp_asconf), 5799 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5800 5801 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5802 sizeof(struct sctp_asconf_ack), 5803 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5804 5805 5806 /* Master Lock INIT for info structure */ 5807 SCTP_INP_INFO_LOCK_INIT(); 5808 SCTP_STATLOG_INIT_LOCK(); 5809 5810 SCTP_IPI_COUNT_INIT(); 5811 SCTP_IPI_ADDR_INIT(); 5812 #ifdef SCTP_PACKET_LOGGING 5813 SCTP_IP_PKTLOG_INIT(); 5814 #endif 5815 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5816 5817 SCTP_WQ_ADDR_INIT(); 5818 /* not sure if we need all the counts */ 5819 SCTP_BASE_INFO(ipi_count_ep) = 0; 5820 /* assoc/tcb zone info */ 5821 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5822 /* local addrlist zone info */ 5823 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5824 /* remote addrlist zone info */ 5825 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5826 /* chunk info */ 5827 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5828 5829 /* socket queue zone info */ 5830 SCTP_BASE_INFO(ipi_count_readq) = 0; 5831 5832 /* stream out queue cont */ 5833 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5834 5835 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5836 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5837 5838 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5839 5840 /* Init the TIMEWAIT list */ 5841 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5842 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5843 } 5844 5845 sctp_startup_iterator(); 5846 5847 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5848 sctp_startup_mcore_threads(); 5849 #endif 5850 5851 /* 5852 * INIT the default VRF which for BSD is the only one, other O/S's 5853 * may have more. But initially they must start with one and then 5854 * add the VRF's as addresses are added. 5855 */ 5856 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5857 } 5858 5859 /* 5860 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5861 */ 5862 void 5863 sctp_pcb_finish(void) 5864 { 5865 struct sctp_vrflist *vrf_bucket; 5866 struct sctp_vrf *vrf, *nvrf; 5867 struct sctp_ifn *ifn, *nifn; 5868 struct sctp_ifa *ifa, *nifa; 5869 struct sctpvtaghead *chain; 5870 struct sctp_tagblock *twait_block, *prev_twait_block; 5871 struct sctp_laddr *wi, *nwi; 5872 int i; 5873 5874 /* 5875 * Free BSD the it thread never exits but we do clean up. The only 5876 * way freebsd reaches here if we have VRF's but we still add the 5877 * ifdef to make it compile on old versions. 5878 */ 5879 { 5880 struct sctp_iterator *it, *nit; 5881 5882 SCTP_IPI_ITERATOR_WQ_LOCK(); 5883 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5884 if (it->vn != curvnet) { 5885 continue; 5886 } 5887 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5888 if (it->function_atend != NULL) { 5889 (*it->function_atend) (it->pointer, it->val); 5890 } 5891 SCTP_FREE(it, SCTP_M_ITER); 5892 } 5893 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5894 SCTP_ITERATOR_LOCK(); 5895 if ((sctp_it_ctl.cur_it) && 5896 (sctp_it_ctl.cur_it->vn == curvnet)) { 5897 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5898 } 5899 SCTP_ITERATOR_UNLOCK(); 5900 } 5901 5902 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5903 SCTP_WQ_ADDR_LOCK(); 5904 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5905 LIST_REMOVE(wi, sctp_nxt_addr); 5906 SCTP_DECR_LADDR_COUNT(); 5907 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5908 } 5909 SCTP_WQ_ADDR_UNLOCK(); 5910 5911 /* 5912 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5913 * destroyed first). 5914 */ 5915 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5916 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5917 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5918 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5919 /* free the ifa */ 5920 LIST_REMOVE(ifa, next_bucket); 5921 LIST_REMOVE(ifa, next_ifa); 5922 SCTP_FREE(ifa, SCTP_M_IFA); 5923 } 5924 /* free the ifn */ 5925 LIST_REMOVE(ifn, next_bucket); 5926 LIST_REMOVE(ifn, next_ifn); 5927 SCTP_FREE(ifn, SCTP_M_IFN); 5928 } 5929 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5930 /* free the vrf */ 5931 LIST_REMOVE(vrf, next_vrf); 5932 SCTP_FREE(vrf, SCTP_M_VRF); 5933 } 5934 /* free the vrf hashes */ 5935 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5936 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5937 5938 /* 5939 * free the TIMEWAIT list elements malloc'd in the function 5940 * sctp_add_vtag_to_timewait()... 5941 */ 5942 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5943 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5944 if (!LIST_EMPTY(chain)) { 5945 prev_twait_block = NULL; 5946 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5947 if (prev_twait_block) { 5948 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5949 } 5950 prev_twait_block = twait_block; 5951 } 5952 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5953 } 5954 } 5955 5956 /* free the locks and mutexes */ 5957 #ifdef SCTP_PACKET_LOGGING 5958 SCTP_IP_PKTLOG_DESTROY(); 5959 #endif 5960 SCTP_IPI_ADDR_DESTROY(); 5961 SCTP_STATLOG_DESTROY(); 5962 SCTP_INP_INFO_LOCK_DESTROY(); 5963 5964 SCTP_WQ_ADDR_DESTROY(); 5965 5966 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5967 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5968 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5969 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5970 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5971 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5972 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5973 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5974 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5975 /* Get rid of other stuff to */ 5976 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5977 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5978 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5979 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5980 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5981 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5982 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5983 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5984 #endif 5985 } 5986 5987 5988 int 5989 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5990 int offset, int limit, 5991 struct sockaddr *src, struct sockaddr *dst, 5992 struct sockaddr *altsa) 5993 { 5994 /* 5995 * grub through the INIT pulling addresses and loading them to the 5996 * nets structure in the asoc. The from address in the mbuf should 5997 * also be loaded (if it is not already). This routine can be called 5998 * with either INIT or INIT-ACK's as long as the m points to the IP 5999 * packet and the offset points to the beginning of the parameters. 6000 */ 6001 struct sctp_inpcb *inp; 6002 struct sctp_nets *net, *nnet, *net_tmp; 6003 struct sctp_paramhdr *phdr, parm_buf; 6004 struct sctp_tcb *stcb_tmp; 6005 uint16_t ptype, plen; 6006 struct sockaddr *sa; 6007 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6008 struct sctp_auth_random *p_random = NULL; 6009 uint16_t random_len = 0; 6010 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6011 struct sctp_auth_hmac_algo *hmacs = NULL; 6012 uint16_t hmacs_len = 0; 6013 uint8_t saw_asconf = 0; 6014 uint8_t saw_asconf_ack = 0; 6015 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6016 struct sctp_auth_chunk_list *chunks = NULL; 6017 uint16_t num_chunks = 0; 6018 sctp_key_t *new_key; 6019 uint32_t keylen; 6020 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6021 uint8_t ecn_allowed; 6022 6023 #ifdef INET 6024 struct sockaddr_in sin; 6025 6026 #endif 6027 #ifdef INET6 6028 struct sockaddr_in6 sin6; 6029 6030 #endif 6031 6032 /* First get the destination address setup too. */ 6033 #ifdef INET 6034 memset(&sin, 0, sizeof(sin)); 6035 sin.sin_family = AF_INET; 6036 sin.sin_len = sizeof(sin); 6037 sin.sin_port = stcb->rport; 6038 #endif 6039 #ifdef INET6 6040 memset(&sin6, 0, sizeof(sin6)); 6041 sin6.sin6_family = AF_INET6; 6042 sin6.sin6_len = sizeof(struct sockaddr_in6); 6043 sin6.sin6_port = stcb->rport; 6044 #endif 6045 if (altsa) { 6046 sa = altsa; 6047 } else { 6048 sa = src; 6049 } 6050 /* Turn off ECN until we get through all params */ 6051 ecn_allowed = 0; 6052 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6053 /* mark all addresses that we have currently on the list */ 6054 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6055 } 6056 /* does the source address already exist? if so skip it */ 6057 inp = stcb->sctp_ep; 6058 atomic_add_int(&stcb->asoc.refcnt, 1); 6059 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6060 atomic_add_int(&stcb->asoc.refcnt, -1); 6061 6062 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6063 /* we must add the source address */ 6064 /* no scope set here since we have a tcb already. */ 6065 switch (sa->sa_family) { 6066 #ifdef INET 6067 case AF_INET: 6068 if (stcb->asoc.scope.ipv4_addr_legal) { 6069 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6070 return (-1); 6071 } 6072 } 6073 break; 6074 #endif 6075 #ifdef INET6 6076 case AF_INET6: 6077 if (stcb->asoc.scope.ipv6_addr_legal) { 6078 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6079 return (-2); 6080 } 6081 } 6082 break; 6083 #endif 6084 default: 6085 break; 6086 } 6087 } else { 6088 if (net_tmp != NULL && stcb_tmp == stcb) { 6089 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6090 } else if (stcb_tmp != stcb) { 6091 /* It belongs to another association? */ 6092 if (stcb_tmp) 6093 SCTP_TCB_UNLOCK(stcb_tmp); 6094 return (-3); 6095 } 6096 } 6097 if (stcb->asoc.state == 0) { 6098 /* the assoc was freed? */ 6099 return (-4); 6100 } 6101 /* 6102 * peer must explicitly turn this on. This may have been initialized 6103 * to be "on" in order to allow local addr changes while INIT's are 6104 * in flight. 6105 */ 6106 stcb->asoc.peer_supports_asconf = 0; 6107 /* now we must go through each of the params. */ 6108 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6109 while (phdr) { 6110 ptype = ntohs(phdr->param_type); 6111 plen = ntohs(phdr->param_length); 6112 /* 6113 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6114 * (uint32_t)ptype, (int)plen); 6115 */ 6116 if (offset + plen > limit) { 6117 break; 6118 } 6119 if (plen == 0) { 6120 break; 6121 } 6122 #ifdef INET 6123 if (ptype == SCTP_IPV4_ADDRESS) { 6124 if (stcb->asoc.scope.ipv4_addr_legal) { 6125 struct sctp_ipv4addr_param *p4, p4_buf; 6126 6127 /* ok get the v4 address and check/add */ 6128 phdr = sctp_get_next_param(m, offset, 6129 (struct sctp_paramhdr *)&p4_buf, 6130 sizeof(p4_buf)); 6131 if (plen != sizeof(struct sctp_ipv4addr_param) || 6132 phdr == NULL) { 6133 return (-5); 6134 } 6135 p4 = (struct sctp_ipv4addr_param *)phdr; 6136 sin.sin_addr.s_addr = p4->addr; 6137 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6138 /* Skip multi-cast addresses */ 6139 goto next_param; 6140 } 6141 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6142 (sin.sin_addr.s_addr == INADDR_ANY)) { 6143 goto next_param; 6144 } 6145 sa = (struct sockaddr *)&sin; 6146 inp = stcb->sctp_ep; 6147 atomic_add_int(&stcb->asoc.refcnt, 1); 6148 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6149 dst, stcb); 6150 atomic_add_int(&stcb->asoc.refcnt, -1); 6151 6152 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6153 inp == NULL) { 6154 /* we must add the source address */ 6155 /* 6156 * no scope set since we have a tcb 6157 * already 6158 */ 6159 6160 /* 6161 * we must validate the state again 6162 * here 6163 */ 6164 add_it_now: 6165 if (stcb->asoc.state == 0) { 6166 /* the assoc was freed? */ 6167 return (-7); 6168 } 6169 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6170 return (-8); 6171 } 6172 } else if (stcb_tmp == stcb) { 6173 if (stcb->asoc.state == 0) { 6174 /* the assoc was freed? */ 6175 return (-10); 6176 } 6177 if (net != NULL) { 6178 /* clear flag */ 6179 net->dest_state &= 6180 ~SCTP_ADDR_NOT_IN_ASSOC; 6181 } 6182 } else { 6183 /* 6184 * strange, address is in another 6185 * assoc? straighten out locks. 6186 */ 6187 if (stcb_tmp) { 6188 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6189 /* 6190 * in setup state we 6191 * abort this guy 6192 */ 6193 sctp_abort_an_association(stcb_tmp->sctp_ep, 6194 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6195 goto add_it_now; 6196 } 6197 SCTP_TCB_UNLOCK(stcb_tmp); 6198 } 6199 if (stcb->asoc.state == 0) { 6200 /* the assoc was freed? */ 6201 return (-12); 6202 } 6203 return (-13); 6204 } 6205 } 6206 } else 6207 #endif 6208 #ifdef INET6 6209 if (ptype == SCTP_IPV6_ADDRESS) { 6210 if (stcb->asoc.scope.ipv6_addr_legal) { 6211 /* ok get the v6 address and check/add */ 6212 struct sctp_ipv6addr_param *p6, p6_buf; 6213 6214 phdr = sctp_get_next_param(m, offset, 6215 (struct sctp_paramhdr *)&p6_buf, 6216 sizeof(p6_buf)); 6217 if (plen != sizeof(struct sctp_ipv6addr_param) || 6218 phdr == NULL) { 6219 return (-14); 6220 } 6221 p6 = (struct sctp_ipv6addr_param *)phdr; 6222 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6223 sizeof(p6->addr)); 6224 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6225 /* Skip multi-cast addresses */ 6226 goto next_param; 6227 } 6228 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6229 /* 6230 * Link local make no sense without 6231 * scope 6232 */ 6233 goto next_param; 6234 } 6235 sa = (struct sockaddr *)&sin6; 6236 inp = stcb->sctp_ep; 6237 atomic_add_int(&stcb->asoc.refcnt, 1); 6238 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6239 dst, stcb); 6240 atomic_add_int(&stcb->asoc.refcnt, -1); 6241 if (stcb_tmp == NULL && 6242 (inp == stcb->sctp_ep || inp == NULL)) { 6243 /* 6244 * we must validate the state again 6245 * here 6246 */ 6247 add_it_now6: 6248 if (stcb->asoc.state == 0) { 6249 /* the assoc was freed? */ 6250 return (-16); 6251 } 6252 /* 6253 * we must add the address, no scope 6254 * set 6255 */ 6256 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6257 return (-17); 6258 } 6259 } else if (stcb_tmp == stcb) { 6260 /* 6261 * we must validate the state again 6262 * here 6263 */ 6264 if (stcb->asoc.state == 0) { 6265 /* the assoc was freed? */ 6266 return (-19); 6267 } 6268 if (net != NULL) { 6269 /* clear flag */ 6270 net->dest_state &= 6271 ~SCTP_ADDR_NOT_IN_ASSOC; 6272 } 6273 } else { 6274 /* 6275 * strange, address is in another 6276 * assoc? straighten out locks. 6277 */ 6278 if (stcb_tmp) 6279 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6280 /* 6281 * in setup state we 6282 * abort this guy 6283 */ 6284 sctp_abort_an_association(stcb_tmp->sctp_ep, 6285 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6286 goto add_it_now6; 6287 } 6288 SCTP_TCB_UNLOCK(stcb_tmp); 6289 6290 if (stcb->asoc.state == 0) { 6291 /* the assoc was freed? */ 6292 return (-21); 6293 } 6294 return (-22); 6295 } 6296 } 6297 } else 6298 #endif 6299 if (ptype == SCTP_ECN_CAPABLE) { 6300 ecn_allowed = 1; 6301 } else if (ptype == SCTP_ULP_ADAPTATION) { 6302 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6303 struct sctp_adaptation_layer_indication ai, 6304 *aip; 6305 6306 phdr = sctp_get_next_param(m, offset, 6307 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6308 aip = (struct sctp_adaptation_layer_indication *)phdr; 6309 if (aip) { 6310 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6311 stcb->asoc.adaptation_needed = 1; 6312 } 6313 } 6314 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6315 struct sctp_asconf_addr_param lstore, *fee; 6316 int lptype; 6317 struct sockaddr *lsa = NULL; 6318 6319 #ifdef INET 6320 struct sctp_asconf_addrv4_param *fii; 6321 6322 #endif 6323 6324 stcb->asoc.peer_supports_asconf = 1; 6325 if (plen > sizeof(lstore)) { 6326 return (-23); 6327 } 6328 phdr = sctp_get_next_param(m, offset, 6329 (struct sctp_paramhdr *)&lstore, 6330 min(plen, sizeof(lstore))); 6331 if (phdr == NULL) { 6332 return (-24); 6333 } 6334 fee = (struct sctp_asconf_addr_param *)phdr; 6335 lptype = ntohs(fee->addrp.ph.param_type); 6336 switch (lptype) { 6337 #ifdef INET 6338 case SCTP_IPV4_ADDRESS: 6339 if (plen != 6340 sizeof(struct sctp_asconf_addrv4_param)) { 6341 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6342 (int)sizeof(struct sctp_asconf_addrv4_param), 6343 plen); 6344 } else { 6345 fii = (struct sctp_asconf_addrv4_param *)fee; 6346 sin.sin_addr.s_addr = fii->addrp.addr; 6347 lsa = (struct sockaddr *)&sin; 6348 } 6349 break; 6350 #endif 6351 #ifdef INET6 6352 case SCTP_IPV6_ADDRESS: 6353 if (plen != 6354 sizeof(struct sctp_asconf_addr_param)) { 6355 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6356 (int)sizeof(struct sctp_asconf_addr_param), 6357 plen); 6358 } else { 6359 memcpy(sin6.sin6_addr.s6_addr, 6360 fee->addrp.addr, 6361 sizeof(fee->addrp.addr)); 6362 lsa = (struct sockaddr *)&sin6; 6363 } 6364 break; 6365 #endif 6366 default: 6367 break; 6368 } 6369 if (lsa) { 6370 (void)sctp_set_primary_addr(stcb, sa, NULL); 6371 } 6372 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6373 stcb->asoc.peer_supports_nat = 1; 6374 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6375 /* Peer supports pr-sctp */ 6376 stcb->asoc.peer_supports_prsctp = 1; 6377 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6378 /* A supported extension chunk */ 6379 struct sctp_supported_chunk_types_param *pr_supported; 6380 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6381 int num_ent, i; 6382 6383 phdr = sctp_get_next_param(m, offset, 6384 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6385 if (phdr == NULL) { 6386 return (-25); 6387 } 6388 stcb->asoc.peer_supports_asconf = 0; 6389 stcb->asoc.peer_supports_prsctp = 0; 6390 stcb->asoc.peer_supports_pktdrop = 0; 6391 stcb->asoc.peer_supports_strreset = 0; 6392 stcb->asoc.peer_supports_nr_sack = 0; 6393 stcb->asoc.peer_supports_auth = 0; 6394 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6395 num_ent = plen - sizeof(struct sctp_paramhdr); 6396 for (i = 0; i < num_ent; i++) { 6397 switch (pr_supported->chunk_types[i]) { 6398 case SCTP_ASCONF: 6399 case SCTP_ASCONF_ACK: 6400 stcb->asoc.peer_supports_asconf = 1; 6401 break; 6402 case SCTP_FORWARD_CUM_TSN: 6403 stcb->asoc.peer_supports_prsctp = 1; 6404 break; 6405 case SCTP_PACKET_DROPPED: 6406 stcb->asoc.peer_supports_pktdrop = 1; 6407 break; 6408 case SCTP_NR_SELECTIVE_ACK: 6409 stcb->asoc.peer_supports_nr_sack = 1; 6410 break; 6411 case SCTP_STREAM_RESET: 6412 stcb->asoc.peer_supports_strreset = 1; 6413 break; 6414 case SCTP_AUTHENTICATION: 6415 stcb->asoc.peer_supports_auth = 1; 6416 break; 6417 default: 6418 /* one I have not learned yet */ 6419 break; 6420 6421 } 6422 } 6423 } else if (ptype == SCTP_RANDOM) { 6424 if (plen > sizeof(random_store)) 6425 break; 6426 if (got_random) { 6427 /* already processed a RANDOM */ 6428 goto next_param; 6429 } 6430 phdr = sctp_get_next_param(m, offset, 6431 (struct sctp_paramhdr *)random_store, 6432 min(sizeof(random_store), plen)); 6433 if (phdr == NULL) 6434 return (-26); 6435 p_random = (struct sctp_auth_random *)phdr; 6436 random_len = plen - sizeof(*p_random); 6437 /* enforce the random length */ 6438 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6439 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6440 return (-27); 6441 } 6442 got_random = 1; 6443 } else if (ptype == SCTP_HMAC_LIST) { 6444 int num_hmacs; 6445 int i; 6446 6447 if (plen > sizeof(hmacs_store)) 6448 break; 6449 if (got_hmacs) { 6450 /* already processed a HMAC list */ 6451 goto next_param; 6452 } 6453 phdr = sctp_get_next_param(m, offset, 6454 (struct sctp_paramhdr *)hmacs_store, 6455 min(plen, sizeof(hmacs_store))); 6456 if (phdr == NULL) 6457 return (-28); 6458 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6459 hmacs_len = plen - sizeof(*hmacs); 6460 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6461 /* validate the hmac list */ 6462 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6463 return (-29); 6464 } 6465 if (stcb->asoc.peer_hmacs != NULL) 6466 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6467 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6468 if (stcb->asoc.peer_hmacs != NULL) { 6469 for (i = 0; i < num_hmacs; i++) { 6470 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6471 ntohs(hmacs->hmac_ids[i])); 6472 } 6473 } 6474 got_hmacs = 1; 6475 } else if (ptype == SCTP_CHUNK_LIST) { 6476 int i; 6477 6478 if (plen > sizeof(chunks_store)) 6479 break; 6480 if (got_chklist) { 6481 /* already processed a Chunks list */ 6482 goto next_param; 6483 } 6484 phdr = sctp_get_next_param(m, offset, 6485 (struct sctp_paramhdr *)chunks_store, 6486 min(plen, sizeof(chunks_store))); 6487 if (phdr == NULL) 6488 return (-30); 6489 chunks = (struct sctp_auth_chunk_list *)phdr; 6490 num_chunks = plen - sizeof(*chunks); 6491 if (stcb->asoc.peer_auth_chunks != NULL) 6492 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6493 else 6494 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6495 for (i = 0; i < num_chunks; i++) { 6496 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6497 stcb->asoc.peer_auth_chunks); 6498 /* record asconf/asconf-ack if listed */ 6499 if (chunks->chunk_types[i] == SCTP_ASCONF) 6500 saw_asconf = 1; 6501 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6502 saw_asconf_ack = 1; 6503 6504 } 6505 got_chklist = 1; 6506 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6507 (ptype == SCTP_STATE_COOKIE) || 6508 (ptype == SCTP_UNRECOG_PARAM) || 6509 (ptype == SCTP_COOKIE_PRESERVE) || 6510 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6511 (ptype == SCTP_ADD_IP_ADDRESS) || 6512 (ptype == SCTP_DEL_IP_ADDRESS) || 6513 (ptype == SCTP_ERROR_CAUSE_IND) || 6514 (ptype == SCTP_SUCCESS_REPORT)) { 6515 /* don't care */ ; 6516 } else { 6517 if ((ptype & 0x8000) == 0x0000) { 6518 /* 6519 * must stop processing the rest of the 6520 * param's. Any report bits were handled 6521 * with the call to 6522 * sctp_arethere_unrecognized_parameters() 6523 * when the INIT or INIT-ACK was first seen. 6524 */ 6525 break; 6526 } 6527 } 6528 6529 next_param: 6530 offset += SCTP_SIZE32(plen); 6531 if (offset >= limit) { 6532 break; 6533 } 6534 phdr = sctp_get_next_param(m, offset, &parm_buf, 6535 sizeof(parm_buf)); 6536 } 6537 /* Now check to see if we need to purge any addresses */ 6538 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6539 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6540 SCTP_ADDR_NOT_IN_ASSOC) { 6541 /* This address has been removed from the asoc */ 6542 /* remove and free it */ 6543 stcb->asoc.numnets--; 6544 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6545 sctp_free_remote_addr(net); 6546 if (net == stcb->asoc.primary_destination) { 6547 stcb->asoc.primary_destination = NULL; 6548 sctp_select_primary_destination(stcb); 6549 } 6550 } 6551 } 6552 if (ecn_allowed == 0) { 6553 stcb->asoc.ecn_allowed = 0; 6554 } 6555 /* validate authentication required parameters */ 6556 if (got_random && got_hmacs) { 6557 stcb->asoc.peer_supports_auth = 1; 6558 } else { 6559 stcb->asoc.peer_supports_auth = 0; 6560 } 6561 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6562 /* peer does not support auth but sent a chunks list? */ 6563 return (-31); 6564 } 6565 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6566 !stcb->asoc.peer_supports_auth) { 6567 /* peer supports asconf but not auth? */ 6568 return (-32); 6569 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6570 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6571 return (-33); 6572 } 6573 /* concatenate the full random key */ 6574 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6575 if (chunks != NULL) { 6576 keylen += sizeof(*chunks) + num_chunks; 6577 } 6578 new_key = sctp_alloc_key(keylen); 6579 if (new_key != NULL) { 6580 /* copy in the RANDOM */ 6581 if (p_random != NULL) { 6582 keylen = sizeof(*p_random) + random_len; 6583 bcopy(p_random, new_key->key, keylen); 6584 } 6585 /* append in the AUTH chunks */ 6586 if (chunks != NULL) { 6587 bcopy(chunks, new_key->key + keylen, 6588 sizeof(*chunks) + num_chunks); 6589 keylen += sizeof(*chunks) + num_chunks; 6590 } 6591 /* append in the HMACs */ 6592 if (hmacs != NULL) { 6593 bcopy(hmacs, new_key->key + keylen, 6594 sizeof(*hmacs) + hmacs_len); 6595 } 6596 } else { 6597 /* failed to get memory for the key */ 6598 return (-34); 6599 } 6600 if (stcb->asoc.authinfo.peer_random != NULL) 6601 sctp_free_key(stcb->asoc.authinfo.peer_random); 6602 stcb->asoc.authinfo.peer_random = new_key; 6603 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6604 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6605 6606 return (0); 6607 } 6608 6609 int 6610 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6611 struct sctp_nets *net) 6612 { 6613 /* make sure the requested primary address exists in the assoc */ 6614 if (net == NULL && sa) 6615 net = sctp_findnet(stcb, sa); 6616 6617 if (net == NULL) { 6618 /* didn't find the requested primary address! */ 6619 return (-1); 6620 } else { 6621 /* set the primary address */ 6622 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6623 /* Must be confirmed, so queue to set */ 6624 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6625 return (0); 6626 } 6627 stcb->asoc.primary_destination = net; 6628 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6629 sctp_free_remote_addr(stcb->asoc.alternate); 6630 stcb->asoc.alternate = NULL; 6631 } 6632 net = TAILQ_FIRST(&stcb->asoc.nets); 6633 if (net != stcb->asoc.primary_destination) { 6634 /* 6635 * first one on the list is NOT the primary 6636 * sctp_cmpaddr() is much more efficient if the 6637 * primary is the first on the list, make it so. 6638 */ 6639 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6640 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6641 } 6642 return (0); 6643 } 6644 } 6645 6646 int 6647 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6648 { 6649 /* 6650 * This function serves two purposes. It will see if a TAG can be 6651 * re-used and return 1 for yes it is ok and 0 for don't use that 6652 * tag. A secondary function it will do is purge out old tags that 6653 * can be removed. 6654 */ 6655 struct sctpvtaghead *chain; 6656 struct sctp_tagblock *twait_block; 6657 struct sctpasochead *head; 6658 struct sctp_tcb *stcb; 6659 int i; 6660 6661 SCTP_INP_INFO_RLOCK(); 6662 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6663 SCTP_BASE_INFO(hashasocmark))]; 6664 if (head == NULL) { 6665 /* invalid vtag */ 6666 goto skip_vtag_check; 6667 } 6668 LIST_FOREACH(stcb, head, sctp_asocs) { 6669 /* 6670 * We choose not to lock anything here. TCB's can't be 6671 * removed since we have the read lock, so they can't be 6672 * freed on us, same thing for the INP. I may be wrong with 6673 * this assumption, but we will go with it for now :-) 6674 */ 6675 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6676 continue; 6677 } 6678 if (stcb->asoc.my_vtag == tag) { 6679 /* candidate */ 6680 if (stcb->rport != rport) { 6681 continue; 6682 } 6683 if (stcb->sctp_ep->sctp_lport != lport) { 6684 continue; 6685 } 6686 /* Its a used tag set */ 6687 SCTP_INP_INFO_RUNLOCK(); 6688 return (0); 6689 } 6690 } 6691 skip_vtag_check: 6692 6693 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6694 /* Now what about timed wait ? */ 6695 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6696 /* 6697 * Block(s) are present, lets see if we have this tag in the 6698 * list 6699 */ 6700 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6701 if (twait_block->vtag_block[i].v_tag == 0) { 6702 /* not used */ 6703 continue; 6704 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6705 now->tv_sec) { 6706 /* Audit expires this guy */ 6707 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6708 twait_block->vtag_block[i].v_tag = 0; 6709 twait_block->vtag_block[i].lport = 0; 6710 twait_block->vtag_block[i].rport = 0; 6711 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6712 (twait_block->vtag_block[i].lport == lport) && 6713 (twait_block->vtag_block[i].rport == rport)) { 6714 /* Bad tag, sorry :< */ 6715 SCTP_INP_INFO_RUNLOCK(); 6716 return (0); 6717 } 6718 } 6719 } 6720 SCTP_INP_INFO_RUNLOCK(); 6721 return (1); 6722 } 6723 6724 static void 6725 sctp_drain_mbufs(struct sctp_tcb *stcb) 6726 { 6727 /* 6728 * We must hunt this association for MBUF's past the cumack (i.e. 6729 * out of order data that we can renege on). 6730 */ 6731 struct sctp_association *asoc; 6732 struct sctp_tmit_chunk *chk, *nchk; 6733 uint32_t cumulative_tsn_p1; 6734 struct sctp_queued_to_read *ctl, *nctl; 6735 int cnt, strmat; 6736 uint32_t gap, i; 6737 int fnd = 0; 6738 6739 /* We look for anything larger than the cum-ack + 1 */ 6740 6741 asoc = &stcb->asoc; 6742 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6743 /* none we can reneg on. */ 6744 return; 6745 } 6746 SCTP_STAT_INCR(sctps_protocol_drains_done); 6747 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6748 cnt = 0; 6749 /* First look in the re-assembly queue */ 6750 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6751 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6752 /* Yep it is above cum-ack */ 6753 cnt++; 6754 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6755 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6756 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6757 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6758 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6759 if (chk->data) { 6760 sctp_m_freem(chk->data); 6761 chk->data = NULL; 6762 } 6763 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6764 } 6765 } 6766 /* Ok that was fun, now we will drain all the inbound streams? */ 6767 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6768 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6769 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6770 /* Yep it is above cum-ack */ 6771 cnt++; 6772 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6773 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6774 sctp_ucount_decr(asoc->cnt_on_all_streams); 6775 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6776 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6777 if (ctl->data) { 6778 sctp_m_freem(ctl->data); 6779 ctl->data = NULL; 6780 } 6781 sctp_free_remote_addr(ctl->whoFrom); 6782 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6783 SCTP_DECR_READQ_COUNT(); 6784 } 6785 } 6786 } 6787 if (cnt) { 6788 /* We must back down to see what the new highest is */ 6789 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6790 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6791 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6792 asoc->highest_tsn_inside_map = i; 6793 fnd = 1; 6794 break; 6795 } 6796 } 6797 if (!fnd) { 6798 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6799 } 6800 /* 6801 * Question, should we go through the delivery queue? The 6802 * only reason things are on here is the app not reading OR 6803 * a p-d-api up. An attacker COULD send enough in to 6804 * initiate the PD-API and then send a bunch of stuff to 6805 * other streams... these would wind up on the delivery 6806 * queue.. and then we would not get to them. But in order 6807 * to do this I then have to back-track and un-deliver 6808 * sequence numbers in streams.. el-yucko. I think for now 6809 * we will NOT look at the delivery queue and leave it to be 6810 * something to consider later. An alternative would be to 6811 * abort the P-D-API with a notification and then deliver 6812 * the data.... Or another method might be to keep track of 6813 * how many times the situation occurs and if we see a 6814 * possible attack underway just abort the association. 6815 */ 6816 #ifdef SCTP_DEBUG 6817 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6818 #endif 6819 /* 6820 * Now do we need to find a new 6821 * asoc->highest_tsn_inside_map? 6822 */ 6823 asoc->last_revoke_count = cnt; 6824 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6825 /* sa_ignore NO_NULL_CHK */ 6826 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6827 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6828 } 6829 /* 6830 * Another issue, in un-setting the TSN's in the mapping array we 6831 * DID NOT adjust the highest_tsn marker. This will cause one of 6832 * two things to occur. It may cause us to do extra work in checking 6833 * for our mapping array movement. More importantly it may cause us 6834 * to SACK every datagram. This may not be a bad thing though since 6835 * we will recover once we get our cum-ack above and all this stuff 6836 * we dumped recovered. 6837 */ 6838 } 6839 6840 void 6841 sctp_drain() 6842 { 6843 /* 6844 * We must walk the PCB lists for ALL associations here. The system 6845 * is LOW on MBUF's and needs help. This is where reneging will 6846 * occur. We really hope this does NOT happen! 6847 */ 6848 VNET_ITERATOR_DECL(vnet_iter); 6849 VNET_LIST_RLOCK_NOSLEEP(); 6850 VNET_FOREACH(vnet_iter) { 6851 CURVNET_SET(vnet_iter); 6852 struct sctp_inpcb *inp; 6853 struct sctp_tcb *stcb; 6854 6855 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6856 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6857 #ifdef VIMAGE 6858 continue; 6859 #else 6860 return; 6861 #endif 6862 } 6863 SCTP_INP_INFO_RLOCK(); 6864 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6865 /* For each endpoint */ 6866 SCTP_INP_RLOCK(inp); 6867 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6868 /* For each association */ 6869 SCTP_TCB_LOCK(stcb); 6870 sctp_drain_mbufs(stcb); 6871 SCTP_TCB_UNLOCK(stcb); 6872 } 6873 SCTP_INP_RUNLOCK(inp); 6874 } 6875 SCTP_INP_INFO_RUNLOCK(); 6876 CURVNET_RESTORE(); 6877 } 6878 VNET_LIST_RUNLOCK_NOSLEEP(); 6879 } 6880 6881 /* 6882 * start a new iterator 6883 * iterates through all endpoints and associations based on the pcb_state 6884 * flags and asoc_state. "af" (mandatory) is executed for all matching 6885 * assocs and "ef" (optional) is executed when the iterator completes. 6886 * "inpf" (optional) is executed for each new endpoint as it is being 6887 * iterated through. inpe (optional) is called when the inp completes 6888 * its way through all the stcbs. 6889 */ 6890 int 6891 sctp_initiate_iterator(inp_func inpf, 6892 asoc_func af, 6893 inp_func inpe, 6894 uint32_t pcb_state, 6895 uint32_t pcb_features, 6896 uint32_t asoc_state, 6897 void *argp, 6898 uint32_t argi, 6899 end_func ef, 6900 struct sctp_inpcb *s_inp, 6901 uint8_t chunk_output_off) 6902 { 6903 struct sctp_iterator *it = NULL; 6904 6905 if (af == NULL) { 6906 return (-1); 6907 } 6908 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6909 SCTP_M_ITER); 6910 if (it == NULL) { 6911 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6912 return (ENOMEM); 6913 } 6914 memset(it, 0, sizeof(*it)); 6915 it->function_assoc = af; 6916 it->function_inp = inpf; 6917 if (inpf) 6918 it->done_current_ep = 0; 6919 else 6920 it->done_current_ep = 1; 6921 it->function_atend = ef; 6922 it->pointer = argp; 6923 it->val = argi; 6924 it->pcb_flags = pcb_state; 6925 it->pcb_features = pcb_features; 6926 it->asoc_state = asoc_state; 6927 it->function_inp_end = inpe; 6928 it->no_chunk_output = chunk_output_off; 6929 it->vn = curvnet; 6930 if (s_inp) { 6931 /* Assume lock is held here */ 6932 it->inp = s_inp; 6933 SCTP_INP_INCR_REF(it->inp); 6934 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6935 } else { 6936 SCTP_INP_INFO_RLOCK(); 6937 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6938 if (it->inp) { 6939 SCTP_INP_INCR_REF(it->inp); 6940 } 6941 SCTP_INP_INFO_RUNLOCK(); 6942 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6943 6944 } 6945 SCTP_IPI_ITERATOR_WQ_LOCK(); 6946 6947 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6948 if (sctp_it_ctl.iterator_running == 0) { 6949 sctp_wakeup_iterator(); 6950 } 6951 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6952 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6953 return (0); 6954 } 6955