1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 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 #if defined(INET) || defined(INET6) 49 #include <netinet/udp.h> 50 #endif 51 #ifdef INET6 52 #include <netinet6/ip6_var.h> 53 #endif 54 #include <sys/sched.h> 55 #include <sys/smp.h> 56 #include <sys/unistd.h> 57 58 /* FIX: we don't handle multiple link local scopes */ 59 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 60 #ifdef INET6 61 int 62 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 63 { 64 struct sockaddr_in6 tmp_a, tmp_b; 65 66 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 67 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 68 return (0); 69 } 70 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 75 } 76 #endif 77 78 void 79 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 80 { 81 /* 82 * We really don't need to lock this, but I will just because it 83 * does not hurt. 84 */ 85 SCTP_INP_INFO_RLOCK(); 86 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 87 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 88 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 89 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 90 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 91 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 92 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 93 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 94 SCTP_INP_INFO_RUNLOCK(); 95 } 96 97 /*- 98 * Addresses are added to VRF's (Virtual Router's). For BSD we 99 * have only the default VRF 0. We maintain a hash list of 100 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 101 * these has a list of addresses. When we add a new address 102 * to a VRF we lookup the ifn/ifn_index, if the ifn does 103 * not exist we create it and add it to the list of IFN's 104 * within the VRF. Once we have the sctp_ifn, we add the 105 * address to the list. So we look something like: 106 * 107 * hash-vrf-table 108 * vrf-> ifn-> ifn -> ifn 109 * vrf | 110 * ... +--ifa-> ifa -> ifa 111 * vrf 112 * 113 * We keep these separate lists since the SCTP subsystem will 114 * point to these from its source address selection nets structure. 115 * When an address is deleted it does not happen right away on 116 * the SCTP side, it gets scheduled. What we do when a 117 * delete happens is immediately remove the address from 118 * the master list and decrement the refcount. As our 119 * addip iterator works through and frees the src address 120 * selection pointing to the sctp_ifa, eventually the refcount 121 * will reach 0 and we will delete it. Note that it is assumed 122 * that any locking on system level ifn/ifa is done at the 123 * caller of these functions and these routines will only 124 * lock the SCTP structures as they add or delete things. 125 * 126 * Other notes on VRF concepts. 127 * - An endpoint can be in multiple VRF's 128 * - An association lives within a VRF and only one VRF. 129 * - Any incoming packet we can deduce the VRF for by 130 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 131 * - Any downward send call or connect call must supply the 132 * VRF via ancillary data or via some sort of set default 133 * VRF socket option call (again for BSD no brainer since 134 * the VRF is always 0). 135 * - An endpoint may add multiple VRF's to it. 136 * - Listening sockets can accept associations in any 137 * of the VRF's they are in but the assoc will end up 138 * in only one VRF (gotten from the packet or connect/send). 139 * 140 */ 141 142 struct sctp_vrf * 143 sctp_allocate_vrf(int vrf_id) 144 { 145 struct sctp_vrf *vrf = NULL; 146 struct sctp_vrflist *bucket; 147 148 /* First allocate the VRF structure */ 149 vrf = sctp_find_vrf(vrf_id); 150 if (vrf) { 151 /* Already allocated */ 152 return (vrf); 153 } 154 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 155 SCTP_M_VRF); 156 if (vrf == NULL) { 157 /* No memory */ 158 #ifdef INVARIANTS 159 panic("No memory for VRF:%d", vrf_id); 160 #endif 161 return (NULL); 162 } 163 /* setup the VRF */ 164 memset(vrf, 0, sizeof(struct sctp_vrf)); 165 vrf->vrf_id = vrf_id; 166 LIST_INIT(&vrf->ifnlist); 167 vrf->total_ifa_count = 0; 168 vrf->refcount = 0; 169 /* now also setup table ids */ 170 SCTP_INIT_VRF_TABLEID(vrf); 171 /* Init the HASH of addresses */ 172 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 173 &vrf->vrf_addr_hashmark); 174 if (vrf->vrf_addr_hash == NULL) { 175 /* No memory */ 176 #ifdef INVARIANTS 177 panic("No memory for VRF:%d", vrf_id); 178 #endif 179 SCTP_FREE(vrf, SCTP_M_VRF); 180 return (NULL); 181 } 182 183 /* Add it to the hash table */ 184 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 185 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 186 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 187 return (vrf); 188 } 189 190 struct sctp_ifn * 191 sctp_find_ifn(void *ifn, uint32_t ifn_index) 192 { 193 struct sctp_ifn *sctp_ifnp; 194 struct sctp_ifnlist *hash_ifn_head; 195 196 /* 197 * We assume the lock is held for the addresses if that's wrong 198 * problems could occur :-) 199 */ 200 SCTP_IPI_ADDR_LOCK_ASSERT(); 201 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 202 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 203 if (sctp_ifnp->ifn_index == ifn_index) { 204 return (sctp_ifnp); 205 } 206 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 207 return (sctp_ifnp); 208 } 209 } 210 return (NULL); 211 } 212 213 struct sctp_vrf * 214 sctp_find_vrf(uint32_t vrf_id) 215 { 216 struct sctp_vrflist *bucket; 217 struct sctp_vrf *liste; 218 219 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 220 LIST_FOREACH(liste, bucket, next_vrf) { 221 if (vrf_id == liste->vrf_id) { 222 return (liste); 223 } 224 } 225 return (NULL); 226 } 227 228 void 229 sctp_free_vrf(struct sctp_vrf *vrf) 230 { 231 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 232 if (vrf->vrf_addr_hash) { 233 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 234 vrf->vrf_addr_hash = NULL; 235 } 236 /* We zero'd the count */ 237 LIST_REMOVE(vrf, next_vrf); 238 SCTP_FREE(vrf, SCTP_M_VRF); 239 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 240 } 241 } 242 243 void 244 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 245 { 246 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 247 /* We zero'd the count */ 248 if (sctp_ifnp->vrf) { 249 sctp_free_vrf(sctp_ifnp->vrf); 250 } 251 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 252 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 253 } 254 } 255 256 void 257 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 258 { 259 struct sctp_ifn *sctp_ifnp; 260 261 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 262 if (sctp_ifnp != NULL) { 263 sctp_ifnp->ifn_mtu = mtu; 264 } 265 } 266 267 void 268 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 269 { 270 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 271 /* We zero'd the count */ 272 if (sctp_ifap->ifn_p) { 273 sctp_free_ifn(sctp_ifap->ifn_p); 274 } 275 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 276 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 277 } 278 } 279 280 static void 281 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 282 { 283 struct sctp_ifn *found; 284 285 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 286 if (found == NULL) { 287 /* Not in the list.. sorry */ 288 return; 289 } 290 if (hold_addr_lock == 0) { 291 SCTP_IPI_ADDR_WLOCK(); 292 } else { 293 SCTP_IPI_ADDR_WLOCK_ASSERT(); 294 } 295 LIST_REMOVE(sctp_ifnp, next_bucket); 296 LIST_REMOVE(sctp_ifnp, next_ifn); 297 if (hold_addr_lock == 0) { 298 SCTP_IPI_ADDR_WUNLOCK(); 299 } 300 /* Take away the reference, and possibly free it */ 301 sctp_free_ifn(sctp_ifnp); 302 } 303 304 void 305 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 306 const char *if_name, uint32_t ifn_index) 307 { 308 struct sctp_vrf *vrf; 309 struct sctp_ifa *sctp_ifap; 310 311 SCTP_IPI_ADDR_RLOCK(); 312 vrf = sctp_find_vrf(vrf_id); 313 if (vrf == NULL) { 314 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 315 goto out; 316 } 317 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 318 if (sctp_ifap == NULL) { 319 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 320 goto out; 321 } 322 if (sctp_ifap->ifn_p == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 324 goto out; 325 } 326 if (if_name) { 327 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 328 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 329 sctp_ifap->ifn_p->ifn_name, if_name); 330 goto out; 331 } 332 } else { 333 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 334 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 335 sctp_ifap->ifn_p->ifn_index, ifn_index); 336 goto out; 337 } 338 } 339 340 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 341 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 342 out: 343 SCTP_IPI_ADDR_RUNLOCK(); 344 } 345 346 void 347 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 348 const char *if_name, uint32_t ifn_index) 349 { 350 struct sctp_vrf *vrf; 351 struct sctp_ifa *sctp_ifap; 352 353 SCTP_IPI_ADDR_RLOCK(); 354 vrf = sctp_find_vrf(vrf_id); 355 if (vrf == NULL) { 356 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 357 goto out; 358 } 359 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 360 if (sctp_ifap == NULL) { 361 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 362 goto out; 363 } 364 if (sctp_ifap->ifn_p == NULL) { 365 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 366 goto out; 367 } 368 if (if_name) { 369 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 370 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 371 sctp_ifap->ifn_p->ifn_name, if_name); 372 goto out; 373 } 374 } else { 375 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 376 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 377 sctp_ifap->ifn_p->ifn_index, ifn_index); 378 goto out; 379 } 380 } 381 382 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 383 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 384 out: 385 SCTP_IPI_ADDR_RUNLOCK(); 386 } 387 388 /*- 389 * Add an ifa to an ifn. 390 * Register the interface as necessary. 391 * NOTE: ADDR write lock MUST be held. 392 */ 393 static void 394 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 395 { 396 int ifa_af; 397 398 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 399 sctp_ifap->ifn_p = sctp_ifnp; 400 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 401 /* update address counts */ 402 sctp_ifnp->ifa_count++; 403 ifa_af = sctp_ifap->address.sa.sa_family; 404 switch (ifa_af) { 405 #ifdef INET 406 case AF_INET: 407 sctp_ifnp->num_v4++; 408 break; 409 #endif 410 #ifdef INET6 411 case AF_INET6: 412 sctp_ifnp->num_v6++; 413 break; 414 #endif 415 default: 416 break; 417 } 418 if (sctp_ifnp->ifa_count == 1) { 419 /* register the new interface */ 420 sctp_ifnp->registered_af = ifa_af; 421 } 422 } 423 424 /*- 425 * Remove an ifa from its ifn. 426 * If no more addresses exist, remove the ifn too. Otherwise, re-register 427 * the interface based on the remaining address families left. 428 * NOTE: ADDR write lock MUST be held. 429 */ 430 static void 431 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 432 { 433 LIST_REMOVE(sctp_ifap, next_ifa); 434 if (sctp_ifap->ifn_p) { 435 /* update address counts */ 436 sctp_ifap->ifn_p->ifa_count--; 437 switch (sctp_ifap->address.sa.sa_family) { 438 #ifdef INET 439 case AF_INET: 440 sctp_ifap->ifn_p->num_v4--; 441 break; 442 #endif 443 #ifdef INET6 444 case AF_INET6: 445 sctp_ifap->ifn_p->num_v6--; 446 break; 447 #endif 448 default: 449 break; 450 } 451 452 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 453 /* remove the ifn, possibly freeing it */ 454 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 455 } else { 456 /* re-register address family type, if needed */ 457 if ((sctp_ifap->ifn_p->num_v6 == 0) && 458 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 459 sctp_ifap->ifn_p->registered_af = AF_INET; 460 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 461 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 462 sctp_ifap->ifn_p->registered_af = AF_INET6; 463 } 464 /* free the ifn refcount */ 465 sctp_free_ifn(sctp_ifap->ifn_p); 466 } 467 sctp_ifap->ifn_p = NULL; 468 } 469 } 470 471 struct sctp_ifa * 472 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 473 uint32_t ifn_type, const char *if_name, void *ifa, 474 struct sockaddr *addr, uint32_t ifa_flags, 475 int dynamic_add) 476 { 477 struct sctp_vrf *vrf; 478 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp; 479 struct sctp_ifa *sctp_ifap, *new_sctp_ifap; 480 struct sctp_ifalist *hash_addr_head; 481 struct sctp_ifnlist *hash_ifn_head; 482 uint32_t hash_of_addr; 483 int new_ifn_af = 0; 484 485 #ifdef SCTP_DEBUG 486 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 487 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 488 #endif 489 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *, 490 sizeof(struct sctp_ifn), SCTP_M_IFN); 491 if (new_sctp_ifnp == NULL) { 492 #ifdef INVARIANTS 493 panic("No memory for IFN"); 494 #endif 495 return (NULL); 496 } 497 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 498 if (new_sctp_ifap == NULL) { 499 #ifdef INVARIANTS 500 panic("No memory for IFA"); 501 #endif 502 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 503 return (NULL); 504 } 505 506 SCTP_IPI_ADDR_WLOCK(); 507 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 508 if (sctp_ifnp) { 509 vrf = sctp_ifnp->vrf; 510 } else { 511 vrf = sctp_find_vrf(vrf_id); 512 if (vrf == NULL) { 513 vrf = sctp_allocate_vrf(vrf_id); 514 if (vrf == NULL) { 515 SCTP_IPI_ADDR_WUNLOCK(); 516 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 517 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 518 return (NULL); 519 } 520 } 521 } 522 if (sctp_ifnp == NULL) { 523 /* 524 * build one and add it, can't hold lock until after malloc 525 * done though. 526 */ 527 sctp_ifnp = new_sctp_ifnp; 528 new_sctp_ifnp = NULL; 529 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 530 sctp_ifnp->ifn_index = ifn_index; 531 sctp_ifnp->ifn_p = ifn; 532 sctp_ifnp->ifn_type = ifn_type; 533 sctp_ifnp->refcount = 0; 534 sctp_ifnp->vrf = vrf; 535 atomic_add_int(&vrf->refcount, 1); 536 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index); 537 if (if_name != NULL) { 538 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 539 } else { 540 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 541 } 542 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 543 LIST_INIT(&sctp_ifnp->ifalist); 544 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 545 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 546 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 547 new_ifn_af = 1; 548 } 549 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 550 if (sctp_ifap) { 551 /* Hmm, it already exists? */ 552 if ((sctp_ifap->ifn_p) && 553 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 554 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 555 sctp_ifap->ifn_p->ifn_name, ifn_index, 556 (void *)sctp_ifap); 557 if (new_ifn_af) { 558 /* Remove the created one that we don't want */ 559 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 560 } 561 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 562 /* easy to solve, just switch back to active */ 563 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 564 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 565 sctp_ifap->ifn_p = sctp_ifnp; 566 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 567 } 568 exit_stage_left: 569 SCTP_IPI_ADDR_WUNLOCK(); 570 if (new_sctp_ifnp != NULL) { 571 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 572 } 573 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 574 return (sctp_ifap); 575 } else { 576 if (sctp_ifap->ifn_p) { 577 /* 578 * The last IFN gets the address, remove the 579 * old one 580 */ 581 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 582 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 583 sctp_ifap->ifn_p->ifn_index, if_name, 584 ifn_index); 585 /* remove the address from the old ifn */ 586 sctp_remove_ifa_from_ifn(sctp_ifap); 587 /* move the address over to the new ifn */ 588 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 589 goto exit_stage_left; 590 } else { 591 /* repair ifnp which was NULL ? */ 592 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 593 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 594 (void *)sctp_ifnp, (void *)sctp_ifap); 595 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 596 } 597 goto exit_stage_left; 598 } 599 } 600 sctp_ifap = new_sctp_ifap; 601 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 602 sctp_ifap->ifn_p = sctp_ifnp; 603 atomic_add_int(&sctp_ifnp->refcount, 1); 604 sctp_ifap->vrf_id = vrf_id; 605 sctp_ifap->ifa = ifa; 606 memcpy(&sctp_ifap->address, addr, addr->sa_len); 607 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 608 sctp_ifap->flags = ifa_flags; 609 /* Set scope */ 610 switch (sctp_ifap->address.sa.sa_family) { 611 #ifdef INET 612 case AF_INET: 613 { 614 struct sockaddr_in *sin; 615 616 sin = &sctp_ifap->address.sin; 617 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 618 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 619 sctp_ifap->src_is_loop = 1; 620 } 621 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 622 sctp_ifap->src_is_priv = 1; 623 } 624 sctp_ifnp->num_v4++; 625 if (new_ifn_af) 626 new_ifn_af = AF_INET; 627 break; 628 } 629 #endif 630 #ifdef INET6 631 case AF_INET6: 632 { 633 /* ok to use deprecated addresses? */ 634 struct sockaddr_in6 *sin6; 635 636 sin6 = &sctp_ifap->address.sin6; 637 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 638 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 639 sctp_ifap->src_is_loop = 1; 640 } 641 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 642 sctp_ifap->src_is_priv = 1; 643 } 644 sctp_ifnp->num_v6++; 645 if (new_ifn_af) 646 new_ifn_af = AF_INET6; 647 break; 648 } 649 #endif 650 default: 651 new_ifn_af = 0; 652 break; 653 } 654 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 655 656 if ((sctp_ifap->src_is_priv == 0) && 657 (sctp_ifap->src_is_loop == 0)) { 658 sctp_ifap->src_is_glob = 1; 659 } 660 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 661 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 662 sctp_ifap->refcount = 1; 663 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 664 sctp_ifnp->ifa_count++; 665 vrf->total_ifa_count++; 666 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 667 if (new_ifn_af) { 668 sctp_ifnp->registered_af = new_ifn_af; 669 } 670 SCTP_IPI_ADDR_WUNLOCK(); 671 if (new_sctp_ifnp != NULL) { 672 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 673 } 674 675 if (dynamic_add) { 676 /* 677 * Bump up the refcount so that when the timer completes it 678 * will drop back down. 679 */ 680 struct sctp_laddr *wi; 681 682 atomic_add_int(&sctp_ifap->refcount, 1); 683 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 684 if (wi == NULL) { 685 /* 686 * Gak, what can we do? We have lost an address 687 * change can you say HOSED? 688 */ 689 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 690 /* Opps, must decrement the count */ 691 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 692 if_name); 693 return (NULL); 694 } 695 SCTP_INCR_LADDR_COUNT(); 696 memset(wi, 0, sizeof(*wi)); 697 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 698 wi->ifa = sctp_ifap; 699 wi->action = SCTP_ADD_IP_ADDRESS; 700 701 SCTP_WQ_ADDR_LOCK(); 702 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 703 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 704 (struct sctp_inpcb *)NULL, 705 (struct sctp_tcb *)NULL, 706 (struct sctp_nets *)NULL); 707 SCTP_WQ_ADDR_UNLOCK(); 708 } else { 709 /* it's ready for use */ 710 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 711 } 712 return (sctp_ifap); 713 } 714 715 void 716 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 717 uint32_t ifn_index, const char *if_name) 718 { 719 struct sctp_vrf *vrf; 720 struct sctp_ifa *sctp_ifap = NULL; 721 722 SCTP_IPI_ADDR_WLOCK(); 723 vrf = sctp_find_vrf(vrf_id); 724 if (vrf == NULL) { 725 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 726 goto out_now; 727 } 728 729 #ifdef SCTP_DEBUG 730 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 731 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 732 #endif 733 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 734 if (sctp_ifap) { 735 /* Validate the delete */ 736 if (sctp_ifap->ifn_p) { 737 int valid = 0; 738 739 /*- 740 * The name has priority over the ifn_index 741 * if its given. 742 */ 743 if (if_name) { 744 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 745 /* They match its a correct delete */ 746 valid = 1; 747 } 748 } 749 if (!valid) { 750 /* last ditch check ifn_index */ 751 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 752 valid = 1; 753 } 754 } 755 if (!valid) { 756 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 757 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 759 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 760 SCTP_IPI_ADDR_WUNLOCK(); 761 return; 762 } 763 } 764 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 765 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 766 /* 767 * We don't set the flag. This means that the structure will 768 * hang around in EP's that have bound specific to it until 769 * they close. This gives us TCP like behavior if someone 770 * removes an address (or for that matter adds it right 771 * back). 772 */ 773 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 774 vrf->total_ifa_count--; 775 LIST_REMOVE(sctp_ifap, next_bucket); 776 sctp_remove_ifa_from_ifn(sctp_ifap); 777 } 778 #ifdef SCTP_DEBUG 779 else { 780 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 781 ifn_index); 782 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 783 } 784 #endif 785 786 out_now: 787 SCTP_IPI_ADDR_WUNLOCK(); 788 if (sctp_ifap) { 789 struct sctp_laddr *wi; 790 791 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 792 if (wi == NULL) { 793 /* 794 * Gak, what can we do? We have lost an address 795 * change can you say HOSED? 796 */ 797 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 798 799 /* Oops, must decrement the count */ 800 sctp_free_ifa(sctp_ifap); 801 return; 802 } 803 SCTP_INCR_LADDR_COUNT(); 804 memset(wi, 0, sizeof(*wi)); 805 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 806 wi->ifa = sctp_ifap; 807 wi->action = SCTP_DEL_IP_ADDRESS; 808 SCTP_WQ_ADDR_LOCK(); 809 /* 810 * Should this really be a tailq? As it is we will process 811 * the newest first :-0 812 */ 813 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 814 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 815 (struct sctp_inpcb *)NULL, 816 (struct sctp_tcb *)NULL, 817 (struct sctp_nets *)NULL); 818 SCTP_WQ_ADDR_UNLOCK(); 819 } 820 return; 821 } 822 823 static int 824 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 825 { 826 int loopback_scope; 827 #if defined(INET) 828 int ipv4_local_scope, ipv4_addr_legal; 829 #endif 830 #if defined(INET6) 831 int local_scope, site_scope, ipv6_addr_legal; 832 #endif 833 struct sctp_vrf *vrf; 834 struct sctp_ifn *sctp_ifn; 835 struct sctp_ifa *sctp_ifa; 836 837 loopback_scope = stcb->asoc.scope.loopback_scope; 838 #if defined(INET) 839 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 840 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 841 #endif 842 #if defined(INET6) 843 local_scope = stcb->asoc.scope.local_scope; 844 site_scope = stcb->asoc.scope.site_scope; 845 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 846 #endif 847 848 SCTP_IPI_ADDR_RLOCK(); 849 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 850 if (vrf == NULL) { 851 /* no vrf, no addresses */ 852 SCTP_IPI_ADDR_RUNLOCK(); 853 return (0); 854 } 855 856 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 857 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 858 if ((loopback_scope == 0) && 859 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 860 continue; 861 } 862 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 863 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 864 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 865 /* 866 * We allow pending addresses, where 867 * we have sent an asconf-add to be 868 * considered valid. 869 */ 870 continue; 871 } 872 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 873 continue; 874 } 875 switch (sctp_ifa->address.sa.sa_family) { 876 #ifdef INET 877 case AF_INET: 878 if (ipv4_addr_legal) { 879 struct sockaddr_in *sin, 880 *rsin; 881 882 sin = &sctp_ifa->address.sin; 883 rsin = (struct sockaddr_in *)to; 884 if ((ipv4_local_scope == 0) && 885 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 886 continue; 887 } 888 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 889 &sin->sin_addr) != 0) { 890 continue; 891 } 892 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 893 SCTP_IPI_ADDR_RUNLOCK(); 894 return (1); 895 } 896 } 897 break; 898 #endif 899 #ifdef INET6 900 case AF_INET6: 901 if (ipv6_addr_legal) { 902 struct sockaddr_in6 *sin6, 903 *rsin6; 904 905 sin6 = &sctp_ifa->address.sin6; 906 rsin6 = (struct sockaddr_in6 *)to; 907 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 908 &sin6->sin6_addr) != 0) { 909 continue; 910 } 911 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 912 if (local_scope == 0) 913 continue; 914 if (sin6->sin6_scope_id == 0) { 915 if (sa6_recoverscope(sin6) != 0) 916 continue; 917 } 918 } 919 if ((site_scope == 0) && 920 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 921 continue; 922 } 923 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 924 SCTP_IPI_ADDR_RUNLOCK(); 925 return (1); 926 } 927 } 928 break; 929 #endif 930 default: 931 /* TSNH */ 932 break; 933 } 934 } 935 } 936 } else { 937 struct sctp_laddr *laddr; 938 939 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 940 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 941 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 942 continue; 943 } 944 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 945 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 946 /* 947 * We allow pending addresses, where we have 948 * sent an asconf-add to be considered 949 * valid. 950 */ 951 continue; 952 } 953 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 954 continue; 955 } 956 switch (to->sa_family) { 957 #ifdef INET 958 case AF_INET: 959 { 960 struct sockaddr_in *sin, *rsin; 961 962 sin = &laddr->ifa->address.sin; 963 rsin = (struct sockaddr_in *)to; 964 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 965 SCTP_IPI_ADDR_RUNLOCK(); 966 return (1); 967 } 968 break; 969 } 970 #endif 971 #ifdef INET6 972 case AF_INET6: 973 { 974 struct sockaddr_in6 *sin6, *rsin6; 975 976 sin6 = &laddr->ifa->address.sin6; 977 rsin6 = (struct sockaddr_in6 *)to; 978 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 979 SCTP_IPI_ADDR_RUNLOCK(); 980 return (1); 981 } 982 break; 983 } 984 985 #endif 986 default: 987 /* TSNH */ 988 break; 989 } 990 } 991 } 992 SCTP_IPI_ADDR_RUNLOCK(); 993 return (0); 994 } 995 996 static struct sctp_tcb * 997 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 998 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 999 { 1000 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1001 /* 1002 * If we support the TCP model, then we must now dig through to see 1003 * if we can find our endpoint in the list of tcp ep's. 1004 */ 1005 uint16_t lport, rport; 1006 struct sctppcbhead *ephead; 1007 struct sctp_inpcb *inp; 1008 struct sctp_laddr *laddr; 1009 struct sctp_tcb *stcb; 1010 struct sctp_nets *net; 1011 1012 if ((to == NULL) || (from == NULL)) { 1013 return (NULL); 1014 } 1015 1016 switch (to->sa_family) { 1017 #ifdef INET 1018 case AF_INET: 1019 if (from->sa_family == AF_INET) { 1020 lport = ((struct sockaddr_in *)to)->sin_port; 1021 rport = ((struct sockaddr_in *)from)->sin_port; 1022 } else { 1023 return (NULL); 1024 } 1025 break; 1026 #endif 1027 #ifdef INET6 1028 case AF_INET6: 1029 if (from->sa_family == AF_INET6) { 1030 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1031 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1032 } else { 1033 return (NULL); 1034 } 1035 break; 1036 #endif 1037 default: 1038 return (NULL); 1039 } 1040 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1041 /* 1042 * Ok now for each of the guys in this bucket we must look and see: 1043 * - Does the remote port match. - Does there single association's 1044 * addresses match this address (to). If so we update p_ep to point 1045 * to this ep and return the tcb from it. 1046 */ 1047 LIST_FOREACH(inp, ephead, sctp_hash) { 1048 SCTP_INP_RLOCK(inp); 1049 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1050 SCTP_INP_RUNLOCK(inp); 1051 continue; 1052 } 1053 if (lport != inp->sctp_lport) { 1054 SCTP_INP_RUNLOCK(inp); 1055 continue; 1056 } 1057 switch (to->sa_family) { 1058 #ifdef INET 1059 case AF_INET: 1060 { 1061 struct sockaddr_in *sin; 1062 1063 sin = (struct sockaddr_in *)to; 1064 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1065 &sin->sin_addr) != 0) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 break; 1070 } 1071 #endif 1072 #ifdef INET6 1073 case AF_INET6: 1074 { 1075 struct sockaddr_in6 *sin6; 1076 1077 sin6 = (struct sockaddr_in6 *)to; 1078 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1079 &sin6->sin6_addr) != 0) { 1080 SCTP_INP_RUNLOCK(inp); 1081 continue; 1082 } 1083 break; 1084 } 1085 #endif 1086 default: 1087 SCTP_INP_RUNLOCK(inp); 1088 continue; 1089 } 1090 if (inp->def_vrf_id != vrf_id) { 1091 SCTP_INP_RUNLOCK(inp); 1092 continue; 1093 } 1094 /* check to see if the ep has one of the addresses */ 1095 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1096 /* We are NOT bound all, so look further */ 1097 int match = 0; 1098 1099 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1100 if (laddr->ifa == NULL) { 1101 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1102 continue; 1103 } 1104 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1105 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1106 continue; 1107 } 1108 if (laddr->ifa->address.sa.sa_family == 1109 to->sa_family) { 1110 /* see if it matches */ 1111 #ifdef INET 1112 if (from->sa_family == AF_INET) { 1113 struct sockaddr_in *intf_addr, 1114 *sin; 1115 1116 intf_addr = &laddr->ifa->address.sin; 1117 sin = (struct sockaddr_in *)to; 1118 if (sin->sin_addr.s_addr == 1119 intf_addr->sin_addr.s_addr) { 1120 match = 1; 1121 break; 1122 } 1123 } 1124 #endif 1125 #ifdef INET6 1126 if (from->sa_family == AF_INET6) { 1127 struct sockaddr_in6 *intf_addr6; 1128 struct sockaddr_in6 *sin6; 1129 1130 sin6 = (struct sockaddr_in6 *) 1131 to; 1132 intf_addr6 = &laddr->ifa->address.sin6; 1133 1134 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1135 intf_addr6)) { 1136 match = 1; 1137 break; 1138 } 1139 } 1140 #endif 1141 } 1142 } 1143 if (match == 0) { 1144 /* This endpoint does not have this address */ 1145 SCTP_INP_RUNLOCK(inp); 1146 continue; 1147 } 1148 } 1149 /* 1150 * Ok if we hit here the ep has the address, does it hold 1151 * the tcb? 1152 */ 1153 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1154 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1155 if (stcb == NULL) { 1156 SCTP_INP_RUNLOCK(inp); 1157 continue; 1158 } 1159 SCTP_TCB_LOCK(stcb); 1160 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1161 SCTP_TCB_UNLOCK(stcb); 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 if (stcb->rport != rport) { 1166 /* remote port does not match. */ 1167 SCTP_TCB_UNLOCK(stcb); 1168 SCTP_INP_RUNLOCK(inp); 1169 continue; 1170 } 1171 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1172 SCTP_TCB_UNLOCK(stcb); 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1177 SCTP_TCB_UNLOCK(stcb); 1178 SCTP_INP_RUNLOCK(inp); 1179 continue; 1180 } 1181 /* Does this TCB have a matching address? */ 1182 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1183 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1184 /* not the same family, can't be a match */ 1185 continue; 1186 } 1187 switch (from->sa_family) { 1188 #ifdef INET 1189 case AF_INET: 1190 { 1191 struct sockaddr_in *sin, *rsin; 1192 1193 sin = (struct sockaddr_in *)&net->ro._l_addr; 1194 rsin = (struct sockaddr_in *)from; 1195 if (sin->sin_addr.s_addr == 1196 rsin->sin_addr.s_addr) { 1197 /* found it */ 1198 if (netp != NULL) { 1199 *netp = net; 1200 } 1201 /* 1202 * Update the endpoint 1203 * pointer 1204 */ 1205 *inp_p = inp; 1206 SCTP_INP_RUNLOCK(inp); 1207 return (stcb); 1208 } 1209 break; 1210 } 1211 #endif 1212 #ifdef INET6 1213 case AF_INET6: 1214 { 1215 struct sockaddr_in6 *sin6, *rsin6; 1216 1217 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1218 rsin6 = (struct sockaddr_in6 *)from; 1219 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1220 rsin6)) { 1221 /* found it */ 1222 if (netp != NULL) { 1223 *netp = net; 1224 } 1225 /* 1226 * Update the endpoint 1227 * pointer 1228 */ 1229 *inp_p = inp; 1230 SCTP_INP_RUNLOCK(inp); 1231 return (stcb); 1232 } 1233 break; 1234 } 1235 #endif 1236 default: 1237 /* TSNH */ 1238 break; 1239 } 1240 } 1241 SCTP_TCB_UNLOCK(stcb); 1242 SCTP_INP_RUNLOCK(inp); 1243 } 1244 return (NULL); 1245 } 1246 1247 /* 1248 * rules for use 1249 * 1250 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1251 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1252 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1253 * NULL. 1254 */ 1255 1256 struct sctp_tcb * 1257 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1258 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1259 { 1260 struct sctpasochead *head; 1261 struct sctp_inpcb *inp; 1262 struct sctp_tcb *stcb = NULL; 1263 struct sctp_nets *net; 1264 uint16_t rport; 1265 1266 inp = *inp_p; 1267 switch (remote->sa_family) { 1268 #ifdef INET 1269 case AF_INET: 1270 rport = (((struct sockaddr_in *)remote)->sin_port); 1271 break; 1272 #endif 1273 #ifdef INET6 1274 case AF_INET6: 1275 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1276 break; 1277 #endif 1278 default: 1279 return (NULL); 1280 } 1281 if (locked_tcb) { 1282 /* 1283 * UN-lock so we can do proper locking here this occurs when 1284 * called from load_addresses_from_init. 1285 */ 1286 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1287 SCTP_TCB_UNLOCK(locked_tcb); 1288 } 1289 SCTP_INP_INFO_RLOCK(); 1290 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1291 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1292 /*- 1293 * Now either this guy is our listener or it's the 1294 * connector. If it is the one that issued the connect, then 1295 * it's only chance is to be the first TCB in the list. If 1296 * it is the acceptor, then do the special_lookup to hash 1297 * and find the real inp. 1298 */ 1299 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1300 /* to is peer addr, from is my addr */ 1301 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1302 netp, inp->def_vrf_id); 1303 if ((stcb != NULL) && (locked_tcb == NULL)) { 1304 /* we have a locked tcb, lower refcount */ 1305 SCTP_INP_DECR_REF(inp); 1306 } 1307 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1308 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1309 SCTP_TCB_LOCK(locked_tcb); 1310 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1311 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1312 } 1313 SCTP_INP_INFO_RUNLOCK(); 1314 return (stcb); 1315 } else { 1316 SCTP_INP_WLOCK(inp); 1317 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1318 goto null_return; 1319 } 1320 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1321 if (stcb == NULL) { 1322 goto null_return; 1323 } 1324 SCTP_TCB_LOCK(stcb); 1325 1326 if (stcb->rport != rport) { 1327 /* remote port does not match. */ 1328 SCTP_TCB_UNLOCK(stcb); 1329 goto null_return; 1330 } 1331 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1332 SCTP_TCB_UNLOCK(stcb); 1333 goto null_return; 1334 } 1335 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1336 SCTP_TCB_UNLOCK(stcb); 1337 goto null_return; 1338 } 1339 /* now look at the list of remote addresses */ 1340 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1341 #ifdef INVARIANTS 1342 if (net == (TAILQ_NEXT(net, sctp_next))) { 1343 panic("Corrupt net list"); 1344 } 1345 #endif 1346 if (net->ro._l_addr.sa.sa_family != 1347 remote->sa_family) { 1348 /* not the same family */ 1349 continue; 1350 } 1351 switch (remote->sa_family) { 1352 #ifdef INET 1353 case AF_INET: 1354 { 1355 struct sockaddr_in *sin, 1356 *rsin; 1357 1358 sin = (struct sockaddr_in *) 1359 &net->ro._l_addr; 1360 rsin = (struct sockaddr_in *)remote; 1361 if (sin->sin_addr.s_addr == 1362 rsin->sin_addr.s_addr) { 1363 /* found it */ 1364 if (netp != NULL) { 1365 *netp = net; 1366 } 1367 if (locked_tcb == NULL) { 1368 SCTP_INP_DECR_REF(inp); 1369 } else if (locked_tcb != stcb) { 1370 SCTP_TCB_LOCK(locked_tcb); 1371 } 1372 if (locked_tcb) { 1373 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1374 } 1375 1376 SCTP_INP_WUNLOCK(inp); 1377 SCTP_INP_INFO_RUNLOCK(); 1378 return (stcb); 1379 } 1380 break; 1381 } 1382 #endif 1383 #ifdef INET6 1384 case AF_INET6: 1385 { 1386 struct sockaddr_in6 *sin6, 1387 *rsin6; 1388 1389 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1390 rsin6 = (struct sockaddr_in6 *)remote; 1391 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1392 rsin6)) { 1393 /* found it */ 1394 if (netp != NULL) { 1395 *netp = net; 1396 } 1397 if (locked_tcb == NULL) { 1398 SCTP_INP_DECR_REF(inp); 1399 } else if (locked_tcb != stcb) { 1400 SCTP_TCB_LOCK(locked_tcb); 1401 } 1402 if (locked_tcb) { 1403 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1404 } 1405 SCTP_INP_WUNLOCK(inp); 1406 SCTP_INP_INFO_RUNLOCK(); 1407 return (stcb); 1408 } 1409 break; 1410 } 1411 #endif 1412 default: 1413 /* TSNH */ 1414 break; 1415 } 1416 } 1417 SCTP_TCB_UNLOCK(stcb); 1418 } 1419 } else { 1420 SCTP_INP_WLOCK(inp); 1421 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1422 goto null_return; 1423 } 1424 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1425 inp->sctp_hashmark)]; 1426 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1427 if (stcb->rport != rport) { 1428 /* remote port does not match */ 1429 continue; 1430 } 1431 SCTP_TCB_LOCK(stcb); 1432 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1433 SCTP_TCB_UNLOCK(stcb); 1434 continue; 1435 } 1436 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1437 SCTP_TCB_UNLOCK(stcb); 1438 continue; 1439 } 1440 /* now look at the list of remote addresses */ 1441 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1442 #ifdef INVARIANTS 1443 if (net == (TAILQ_NEXT(net, sctp_next))) { 1444 panic("Corrupt net list"); 1445 } 1446 #endif 1447 if (net->ro._l_addr.sa.sa_family != 1448 remote->sa_family) { 1449 /* not the same family */ 1450 continue; 1451 } 1452 switch (remote->sa_family) { 1453 #ifdef INET 1454 case AF_INET: 1455 { 1456 struct sockaddr_in *sin, 1457 *rsin; 1458 1459 sin = (struct sockaddr_in *) 1460 &net->ro._l_addr; 1461 rsin = (struct sockaddr_in *)remote; 1462 if (sin->sin_addr.s_addr == 1463 rsin->sin_addr.s_addr) { 1464 /* found it */ 1465 if (netp != NULL) { 1466 *netp = net; 1467 } 1468 if (locked_tcb == NULL) { 1469 SCTP_INP_DECR_REF(inp); 1470 } else if (locked_tcb != stcb) { 1471 SCTP_TCB_LOCK(locked_tcb); 1472 } 1473 if (locked_tcb) { 1474 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1475 } 1476 SCTP_INP_WUNLOCK(inp); 1477 SCTP_INP_INFO_RUNLOCK(); 1478 return (stcb); 1479 } 1480 break; 1481 } 1482 #endif 1483 #ifdef INET6 1484 case AF_INET6: 1485 { 1486 struct sockaddr_in6 *sin6, 1487 *rsin6; 1488 1489 sin6 = (struct sockaddr_in6 *) 1490 &net->ro._l_addr; 1491 rsin6 = (struct sockaddr_in6 *)remote; 1492 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1493 rsin6)) { 1494 /* found it */ 1495 if (netp != NULL) { 1496 *netp = net; 1497 } 1498 if (locked_tcb == NULL) { 1499 SCTP_INP_DECR_REF(inp); 1500 } else if (locked_tcb != stcb) { 1501 SCTP_TCB_LOCK(locked_tcb); 1502 } 1503 if (locked_tcb) { 1504 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1505 } 1506 SCTP_INP_WUNLOCK(inp); 1507 SCTP_INP_INFO_RUNLOCK(); 1508 return (stcb); 1509 } 1510 break; 1511 } 1512 #endif 1513 default: 1514 /* TSNH */ 1515 break; 1516 } 1517 } 1518 SCTP_TCB_UNLOCK(stcb); 1519 } 1520 } 1521 null_return: 1522 /* clean up for returning null */ 1523 if (locked_tcb) { 1524 SCTP_TCB_LOCK(locked_tcb); 1525 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1526 } 1527 SCTP_INP_WUNLOCK(inp); 1528 SCTP_INP_INFO_RUNLOCK(); 1529 /* not found */ 1530 return (NULL); 1531 } 1532 1533 /* 1534 * Find an association for a specific endpoint using the association id given 1535 * out in the COMM_UP notification 1536 */ 1537 struct sctp_tcb * 1538 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1539 { 1540 /* 1541 * Use my the assoc_id to find a endpoint 1542 */ 1543 struct sctpasochead *head; 1544 struct sctp_tcb *stcb; 1545 uint32_t id; 1546 1547 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1548 SCTP_PRINTF("TSNH ep_associd0\n"); 1549 return (NULL); 1550 } 1551 id = (uint32_t)asoc_id; 1552 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1553 if (head == NULL) { 1554 /* invalid id TSNH */ 1555 SCTP_PRINTF("TSNH ep_associd1\n"); 1556 return (NULL); 1557 } 1558 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1559 if (stcb->asoc.assoc_id == id) { 1560 if (inp != stcb->sctp_ep) { 1561 /* 1562 * some other guy has the same id active (id 1563 * collision ??). 1564 */ 1565 SCTP_PRINTF("TSNH ep_associd2\n"); 1566 continue; 1567 } 1568 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1569 continue; 1570 } 1571 if (want_lock) { 1572 SCTP_TCB_LOCK(stcb); 1573 } 1574 return (stcb); 1575 } 1576 } 1577 return (NULL); 1578 } 1579 1580 struct sctp_tcb * 1581 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1582 { 1583 struct sctp_tcb *stcb; 1584 1585 SCTP_INP_RLOCK(inp); 1586 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1587 SCTP_INP_RUNLOCK(inp); 1588 return (stcb); 1589 } 1590 1591 /* 1592 * Endpoint probe expects that the INP_INFO is locked. 1593 */ 1594 static struct sctp_inpcb * 1595 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1596 uint16_t lport, uint32_t vrf_id) 1597 { 1598 struct sctp_inpcb *inp; 1599 struct sctp_laddr *laddr; 1600 #ifdef INET 1601 struct sockaddr_in *sin; 1602 #endif 1603 #ifdef INET6 1604 struct sockaddr_in6 *sin6; 1605 struct sockaddr_in6 *intf_addr6; 1606 #endif 1607 int fnd; 1608 1609 #ifdef INET 1610 sin = NULL; 1611 #endif 1612 #ifdef INET6 1613 sin6 = NULL; 1614 #endif 1615 switch (nam->sa_family) { 1616 #ifdef INET 1617 case AF_INET: 1618 sin = (struct sockaddr_in *)nam; 1619 break; 1620 #endif 1621 #ifdef INET6 1622 case AF_INET6: 1623 sin6 = (struct sockaddr_in6 *)nam; 1624 break; 1625 #endif 1626 default: 1627 /* unsupported family */ 1628 return (NULL); 1629 } 1630 1631 if (head == NULL) 1632 return (NULL); 1633 1634 LIST_FOREACH(inp, head, sctp_hash) { 1635 SCTP_INP_RLOCK(inp); 1636 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1637 SCTP_INP_RUNLOCK(inp); 1638 continue; 1639 } 1640 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1641 (inp->sctp_lport == lport)) { 1642 /* got it */ 1643 switch (nam->sa_family) { 1644 #ifdef INET 1645 case AF_INET: 1646 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1647 SCTP_IPV6_V6ONLY(inp)) { 1648 /* 1649 * IPv4 on a IPv6 socket with ONLY 1650 * IPv6 set 1651 */ 1652 SCTP_INP_RUNLOCK(inp); 1653 continue; 1654 } 1655 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1656 &sin->sin_addr) != 0) { 1657 SCTP_INP_RUNLOCK(inp); 1658 continue; 1659 } 1660 break; 1661 #endif 1662 #ifdef INET6 1663 case AF_INET6: 1664 /* 1665 * A V6 address and the endpoint is NOT 1666 * bound V6 1667 */ 1668 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1669 SCTP_INP_RUNLOCK(inp); 1670 continue; 1671 } 1672 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1673 &sin6->sin6_addr) != 0) { 1674 SCTP_INP_RUNLOCK(inp); 1675 continue; 1676 } 1677 break; 1678 #endif 1679 default: 1680 break; 1681 } 1682 /* does a VRF id match? */ 1683 fnd = 0; 1684 if (inp->def_vrf_id == vrf_id) 1685 fnd = 1; 1686 1687 SCTP_INP_RUNLOCK(inp); 1688 if (!fnd) 1689 continue; 1690 return (inp); 1691 } 1692 SCTP_INP_RUNLOCK(inp); 1693 } 1694 switch (nam->sa_family) { 1695 #ifdef INET 1696 case AF_INET: 1697 if (sin->sin_addr.s_addr == INADDR_ANY) { 1698 /* Can't hunt for one that has no address specified */ 1699 return (NULL); 1700 } 1701 break; 1702 #endif 1703 #ifdef INET6 1704 case AF_INET6: 1705 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1706 /* Can't hunt for one that has no address specified */ 1707 return (NULL); 1708 } 1709 break; 1710 #endif 1711 default: 1712 break; 1713 } 1714 /* 1715 * ok, not bound to all so see if we can find a EP bound to this 1716 * address. 1717 */ 1718 LIST_FOREACH(inp, head, sctp_hash) { 1719 SCTP_INP_RLOCK(inp); 1720 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1721 SCTP_INP_RUNLOCK(inp); 1722 continue; 1723 } 1724 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1725 SCTP_INP_RUNLOCK(inp); 1726 continue; 1727 } 1728 /* 1729 * Ok this could be a likely candidate, look at all of its 1730 * addresses 1731 */ 1732 if (inp->sctp_lport != lport) { 1733 SCTP_INP_RUNLOCK(inp); 1734 continue; 1735 } 1736 /* does a VRF id match? */ 1737 fnd = 0; 1738 if (inp->def_vrf_id == vrf_id) 1739 fnd = 1; 1740 1741 if (!fnd) { 1742 SCTP_INP_RUNLOCK(inp); 1743 continue; 1744 } 1745 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1746 if (laddr->ifa == NULL) { 1747 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1748 __func__); 1749 continue; 1750 } 1751 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1752 (void *)laddr->ifa); 1753 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1754 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1755 continue; 1756 } 1757 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1758 /* possible, see if it matches */ 1759 switch (nam->sa_family) { 1760 #ifdef INET 1761 case AF_INET: 1762 if (sin->sin_addr.s_addr == 1763 laddr->ifa->address.sin.sin_addr.s_addr) { 1764 SCTP_INP_RUNLOCK(inp); 1765 return (inp); 1766 } 1767 break; 1768 #endif 1769 #ifdef INET6 1770 case AF_INET6: 1771 intf_addr6 = &laddr->ifa->address.sin6; 1772 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1773 intf_addr6)) { 1774 SCTP_INP_RUNLOCK(inp); 1775 return (inp); 1776 } 1777 break; 1778 #endif 1779 } 1780 } 1781 } 1782 SCTP_INP_RUNLOCK(inp); 1783 } 1784 return (NULL); 1785 } 1786 1787 static struct sctp_inpcb * 1788 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1789 { 1790 struct sctppcbhead *head; 1791 struct sctp_inpcb *t_inp; 1792 int fnd; 1793 1794 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1795 SCTP_BASE_INFO(hashmark))]; 1796 LIST_FOREACH(t_inp, head, sctp_hash) { 1797 if (t_inp->sctp_lport != lport) { 1798 continue; 1799 } 1800 /* is it in the VRF in question */ 1801 fnd = 0; 1802 if (t_inp->def_vrf_id == vrf_id) 1803 fnd = 1; 1804 if (!fnd) 1805 continue; 1806 1807 /* This one is in use. */ 1808 /* check the v6/v4 binding issue */ 1809 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1810 SCTP_IPV6_V6ONLY(t_inp)) { 1811 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1812 /* collision in V6 space */ 1813 return (t_inp); 1814 } else { 1815 /* inp is BOUND_V4 no conflict */ 1816 continue; 1817 } 1818 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1819 /* t_inp is bound v4 and v6, conflict always */ 1820 return (t_inp); 1821 } else { 1822 /* t_inp is bound only V4 */ 1823 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1824 SCTP_IPV6_V6ONLY(inp)) { 1825 /* no conflict */ 1826 continue; 1827 } 1828 /* else fall through to conflict */ 1829 } 1830 return (t_inp); 1831 } 1832 return (NULL); 1833 } 1834 1835 int 1836 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1837 { 1838 /* For 1-2-1 with port reuse */ 1839 struct sctppcbhead *head; 1840 struct sctp_inpcb *tinp, *ninp; 1841 1842 SCTP_INP_INFO_WLOCK_ASSERT(); 1843 SCTP_INP_WLOCK_ASSERT(inp); 1844 1845 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1846 /* only works with port reuse on */ 1847 return (-1); 1848 } 1849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1850 return (0); 1851 } 1852 SCTP_INP_WUNLOCK(inp); 1853 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1854 SCTP_BASE_INFO(hashmark))]; 1855 /* Kick out all non-listeners to the TCP hash */ 1856 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1857 if (tinp->sctp_lport != inp->sctp_lport) { 1858 continue; 1859 } 1860 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1861 continue; 1862 } 1863 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1864 continue; 1865 } 1866 if (SCTP_IS_LISTENING(tinp)) { 1867 continue; 1868 } 1869 SCTP_INP_WLOCK(tinp); 1870 LIST_REMOVE(tinp, sctp_hash); 1871 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1872 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1873 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1874 SCTP_INP_WUNLOCK(tinp); 1875 } 1876 SCTP_INP_WLOCK(inp); 1877 /* Pull from where he was */ 1878 LIST_REMOVE(inp, sctp_hash); 1879 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1880 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1881 LIST_INSERT_HEAD(head, inp, sctp_hash); 1882 return (0); 1883 } 1884 1885 struct sctp_inpcb * 1886 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1887 uint32_t vrf_id) 1888 { 1889 /* 1890 * First we check the hash table to see if someone has this port 1891 * bound with just the port. 1892 */ 1893 struct sctp_inpcb *inp; 1894 struct sctppcbhead *head; 1895 int lport; 1896 unsigned int i; 1897 #ifdef INET 1898 struct sockaddr_in *sin; 1899 #endif 1900 #ifdef INET6 1901 struct sockaddr_in6 *sin6; 1902 #endif 1903 1904 switch (nam->sa_family) { 1905 #ifdef INET 1906 case AF_INET: 1907 sin = (struct sockaddr_in *)nam; 1908 lport = sin->sin_port; 1909 break; 1910 #endif 1911 #ifdef INET6 1912 case AF_INET6: 1913 sin6 = (struct sockaddr_in6 *)nam; 1914 lport = sin6->sin6_port; 1915 break; 1916 #endif 1917 default: 1918 return (NULL); 1919 } 1920 /* 1921 * I could cheat here and just cast to one of the types but we will 1922 * do it right. It also provides the check against an Unsupported 1923 * type too. 1924 */ 1925 /* Find the head of the ALLADDR chain */ 1926 if (have_lock == 0) { 1927 SCTP_INP_INFO_RLOCK(); 1928 } 1929 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1930 SCTP_BASE_INFO(hashmark))]; 1931 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1932 1933 /* 1934 * If the TCP model exists it could be that the main listening 1935 * endpoint is gone but there still exists a connected socket for 1936 * this guy. If so we can return the first one that we find. This 1937 * may NOT be the correct one so the caller should be wary on the 1938 * returned INP. Currently the only caller that sets find_tcp_pool 1939 * is in bindx where we are verifying that a user CAN bind the 1940 * address. He either has bound it already, or someone else has, or 1941 * its open to bind, so this is good enough. 1942 */ 1943 if (inp == NULL && find_tcp_pool) { 1944 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1945 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1946 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1947 if (inp) { 1948 break; 1949 } 1950 } 1951 } 1952 if (inp) { 1953 SCTP_INP_INCR_REF(inp); 1954 } 1955 if (have_lock == 0) { 1956 SCTP_INP_INFO_RUNLOCK(); 1957 } 1958 return (inp); 1959 } 1960 1961 /* 1962 * Find an association for an endpoint with the pointer to whom you want to 1963 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1964 * need to change the *to to some other struct like a mbuf... 1965 */ 1966 struct sctp_tcb * 1967 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1968 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1969 uint32_t vrf_id) 1970 { 1971 struct sctp_inpcb *inp = NULL; 1972 struct sctp_tcb *stcb; 1973 1974 SCTP_INP_INFO_RLOCK(); 1975 if (find_tcp_pool) { 1976 if (inp_p != NULL) { 1977 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1978 vrf_id); 1979 } else { 1980 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1981 vrf_id); 1982 } 1983 if (stcb != NULL) { 1984 SCTP_INP_INFO_RUNLOCK(); 1985 return (stcb); 1986 } 1987 } 1988 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1989 if (inp_p != NULL) { 1990 *inp_p = inp; 1991 } 1992 SCTP_INP_INFO_RUNLOCK(); 1993 if (inp == NULL) { 1994 return (NULL); 1995 } 1996 /* 1997 * ok, we have an endpoint, now lets find the assoc for it (if any) 1998 * we now place the source address or from in the to of the find 1999 * endpoint call. Since in reality this chain is used from the 2000 * inbound packet side. 2001 */ 2002 if (inp_p != NULL) { 2003 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2004 NULL); 2005 } else { 2006 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2007 NULL); 2008 } 2009 return (stcb); 2010 } 2011 2012 /* 2013 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2014 * find all addresses that the sender has specified in any address list. Each 2015 * address will be used to lookup the TCB and see if one exits. 2016 */ 2017 static struct sctp_tcb * 2018 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2019 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2020 struct sockaddr *dst) 2021 { 2022 struct sctp_paramhdr *phdr, param_buf; 2023 #if defined(INET) || defined(INET6) 2024 struct sctp_tcb *stcb; 2025 uint16_t ptype; 2026 #endif 2027 uint16_t plen; 2028 #ifdef INET 2029 struct sockaddr_in sin4; 2030 #endif 2031 #ifdef INET6 2032 struct sockaddr_in6 sin6; 2033 #endif 2034 2035 #ifdef INET 2036 memset(&sin4, 0, sizeof(sin4)); 2037 sin4.sin_len = sizeof(sin4); 2038 sin4.sin_family = AF_INET; 2039 sin4.sin_port = sh->src_port; 2040 #endif 2041 #ifdef INET6 2042 memset(&sin6, 0, sizeof(sin6)); 2043 sin6.sin6_len = sizeof(sin6); 2044 sin6.sin6_family = AF_INET6; 2045 sin6.sin6_port = sh->src_port; 2046 #endif 2047 2048 offset += sizeof(struct sctp_init_chunk); 2049 2050 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2051 while (phdr != NULL) { 2052 /* now we must see if we want the parameter */ 2053 #if defined(INET) || defined(INET6) 2054 ptype = ntohs(phdr->param_type); 2055 #endif 2056 plen = ntohs(phdr->param_length); 2057 if (plen == 0) { 2058 break; 2059 } 2060 #ifdef INET 2061 if (ptype == SCTP_IPV4_ADDRESS && 2062 plen == sizeof(struct sctp_ipv4addr_param)) { 2063 /* Get the rest of the address */ 2064 struct sctp_ipv4addr_param ip4_param, *p4; 2065 2066 phdr = sctp_get_next_param(m, offset, 2067 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2068 if (phdr == NULL) { 2069 return (NULL); 2070 } 2071 p4 = (struct sctp_ipv4addr_param *)phdr; 2072 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2073 /* look it up */ 2074 stcb = sctp_findassociation_ep_addr(inp_p, 2075 (struct sockaddr *)&sin4, netp, dst, NULL); 2076 if (stcb != NULL) { 2077 return (stcb); 2078 } 2079 } 2080 #endif 2081 #ifdef INET6 2082 if (ptype == SCTP_IPV6_ADDRESS && 2083 plen == sizeof(struct sctp_ipv6addr_param)) { 2084 /* Get the rest of the address */ 2085 struct sctp_ipv6addr_param ip6_param, *p6; 2086 2087 phdr = sctp_get_next_param(m, offset, 2088 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2089 if (phdr == NULL) { 2090 return (NULL); 2091 } 2092 p6 = (struct sctp_ipv6addr_param *)phdr; 2093 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2094 /* look it up */ 2095 stcb = sctp_findassociation_ep_addr(inp_p, 2096 (struct sockaddr *)&sin6, netp, dst, NULL); 2097 if (stcb != NULL) { 2098 return (stcb); 2099 } 2100 } 2101 #endif 2102 offset += SCTP_SIZE32(plen); 2103 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2104 sizeof(param_buf)); 2105 } 2106 return (NULL); 2107 } 2108 2109 static struct sctp_tcb * 2110 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2111 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2112 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2113 { 2114 /* 2115 * Use my vtag to hash. If we find it we then verify the source addr 2116 * is in the assoc. If all goes well we save a bit on rec of a 2117 * packet. 2118 */ 2119 struct sctpasochead *head; 2120 struct sctp_nets *net; 2121 struct sctp_tcb *stcb; 2122 2123 SCTP_INP_INFO_RLOCK(); 2124 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2125 SCTP_BASE_INFO(hashasocmark))]; 2126 LIST_FOREACH(stcb, head, sctp_asocs) { 2127 SCTP_INP_RLOCK(stcb->sctp_ep); 2128 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2129 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2130 continue; 2131 } 2132 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2133 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2134 continue; 2135 } 2136 SCTP_TCB_LOCK(stcb); 2137 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2138 if (stcb->asoc.my_vtag == vtag) { 2139 /* candidate */ 2140 if (stcb->rport != rport) { 2141 SCTP_TCB_UNLOCK(stcb); 2142 continue; 2143 } 2144 if (stcb->sctp_ep->sctp_lport != lport) { 2145 SCTP_TCB_UNLOCK(stcb); 2146 continue; 2147 } 2148 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2149 SCTP_TCB_UNLOCK(stcb); 2150 continue; 2151 } 2152 /* RRS:Need toaddr check here */ 2153 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2154 /* Endpoint does not own this address */ 2155 SCTP_TCB_UNLOCK(stcb); 2156 continue; 2157 } 2158 if (remote_tag) { 2159 /* 2160 * If we have both vtags that's all we match 2161 * on 2162 */ 2163 if (stcb->asoc.peer_vtag == remote_tag) { 2164 /* 2165 * If both tags match we consider it 2166 * conclusive and check NO 2167 * source/destination addresses 2168 */ 2169 goto conclusive; 2170 } 2171 } 2172 if (skip_src_check) { 2173 conclusive: 2174 if (from) { 2175 *netp = sctp_findnet(stcb, from); 2176 } else { 2177 *netp = NULL; /* unknown */ 2178 } 2179 if (inp_p) 2180 *inp_p = stcb->sctp_ep; 2181 SCTP_INP_INFO_RUNLOCK(); 2182 return (stcb); 2183 } 2184 net = sctp_findnet(stcb, from); 2185 if (net) { 2186 /* yep its him. */ 2187 *netp = net; 2188 SCTP_STAT_INCR(sctps_vtagexpress); 2189 *inp_p = stcb->sctp_ep; 2190 SCTP_INP_INFO_RUNLOCK(); 2191 return (stcb); 2192 } else { 2193 /* 2194 * not him, this should only happen in rare 2195 * cases so I peg it. 2196 */ 2197 SCTP_STAT_INCR(sctps_vtagbogus); 2198 } 2199 } 2200 SCTP_TCB_UNLOCK(stcb); 2201 } 2202 SCTP_INP_INFO_RUNLOCK(); 2203 return (NULL); 2204 } 2205 2206 /* 2207 * Find an association with the pointer to the inbound IP packet. This can be 2208 * a IPv4 or IPv6 packet. 2209 */ 2210 struct sctp_tcb * 2211 sctp_findassociation_addr(struct mbuf *m, int offset, 2212 struct sockaddr *src, struct sockaddr *dst, 2213 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2214 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2215 { 2216 struct sctp_tcb *stcb; 2217 struct sctp_inpcb *inp; 2218 2219 if (sh->v_tag) { 2220 /* we only go down this path if vtag is non-zero */ 2221 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2222 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2223 if (stcb) { 2224 return (stcb); 2225 } 2226 } 2227 2228 if (inp_p) { 2229 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2230 1, vrf_id); 2231 inp = *inp_p; 2232 } else { 2233 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2234 1, vrf_id); 2235 } 2236 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2237 if (stcb == NULL && inp) { 2238 /* Found a EP but not this address */ 2239 if ((ch->chunk_type == SCTP_INITIATION) || 2240 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2241 /*- 2242 * special hook, we do NOT return linp or an 2243 * association that is linked to an existing 2244 * association that is under the TCP pool (i.e. no 2245 * listener exists). The endpoint finding routine 2246 * will always find a listener before examining the 2247 * TCP pool. 2248 */ 2249 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2250 if (inp_p) { 2251 *inp_p = NULL; 2252 } 2253 return (NULL); 2254 } 2255 stcb = sctp_findassociation_special_addr(m, 2256 offset, sh, &inp, netp, dst); 2257 if (inp_p != NULL) { 2258 *inp_p = inp; 2259 } 2260 } 2261 } 2262 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2263 return (stcb); 2264 } 2265 2266 /* 2267 * lookup an association by an ASCONF lookup address. 2268 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2269 */ 2270 struct sctp_tcb * 2271 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2272 struct sockaddr *dst, struct sctphdr *sh, 2273 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2274 { 2275 struct sctp_tcb *stcb; 2276 union sctp_sockstore remote_store; 2277 struct sctp_paramhdr param_buf, *phdr; 2278 int ptype; 2279 int zero_address = 0; 2280 #ifdef INET 2281 struct sockaddr_in *sin; 2282 #endif 2283 #ifdef INET6 2284 struct sockaddr_in6 *sin6; 2285 #endif 2286 2287 memset(&remote_store, 0, sizeof(remote_store)); 2288 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2289 ¶m_buf, sizeof(struct sctp_paramhdr)); 2290 if (phdr == NULL) { 2291 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2292 __func__); 2293 return NULL; 2294 } 2295 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2296 /* get the correlation address */ 2297 switch (ptype) { 2298 #ifdef INET6 2299 case SCTP_IPV6_ADDRESS: 2300 { 2301 /* ipv6 address param */ 2302 struct sctp_ipv6addr_param *p6, p6_buf; 2303 2304 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2305 return NULL; 2306 } 2307 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2308 offset + sizeof(struct sctp_asconf_chunk), 2309 &p6_buf.ph, sizeof(p6_buf)); 2310 if (p6 == NULL) { 2311 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2312 __func__); 2313 return (NULL); 2314 } 2315 sin6 = &remote_store.sin6; 2316 sin6->sin6_family = AF_INET6; 2317 sin6->sin6_len = sizeof(*sin6); 2318 sin6->sin6_port = sh->src_port; 2319 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2320 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2321 zero_address = 1; 2322 break; 2323 } 2324 #endif 2325 #ifdef INET 2326 case SCTP_IPV4_ADDRESS: 2327 { 2328 /* ipv4 address param */ 2329 struct sctp_ipv4addr_param *p4, p4_buf; 2330 2331 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2332 return NULL; 2333 } 2334 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2335 offset + sizeof(struct sctp_asconf_chunk), 2336 &p4_buf.ph, sizeof(p4_buf)); 2337 if (p4 == NULL) { 2338 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2339 __func__); 2340 return (NULL); 2341 } 2342 sin = &remote_store.sin; 2343 sin->sin_family = AF_INET; 2344 sin->sin_len = sizeof(*sin); 2345 sin->sin_port = sh->src_port; 2346 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2347 if (sin->sin_addr.s_addr == INADDR_ANY) 2348 zero_address = 1; 2349 break; 2350 } 2351 #endif 2352 default: 2353 /* invalid address param type */ 2354 return NULL; 2355 } 2356 2357 if (zero_address) { 2358 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2359 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2360 if (stcb != NULL) { 2361 SCTP_INP_DECR_REF(*inp_p); 2362 } 2363 } else { 2364 stcb = sctp_findassociation_ep_addr(inp_p, 2365 &remote_store.sa, netp, 2366 dst, NULL); 2367 } 2368 return (stcb); 2369 } 2370 2371 /* 2372 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2373 * addresses. This way if we don't get a bind we by default pick a ephemeral 2374 * port with all addresses bound. 2375 */ 2376 int 2377 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2378 { 2379 /* 2380 * we get called when a new endpoint starts up. We need to allocate 2381 * the sctp_inpcb structure from the zone and init it. Mark it as 2382 * unbound and find a port that we can use as an ephemeral with 2383 * INADDR_ANY. If the user binds later no problem we can then add in 2384 * the specific addresses. And setup the default parameters for the 2385 * EP. 2386 */ 2387 int i, error; 2388 struct sctp_inpcb *inp; 2389 struct sctp_pcb *m; 2390 struct timeval time; 2391 sctp_sharedkey_t *null_key; 2392 2393 error = 0; 2394 2395 SCTP_INP_INFO_WLOCK(); 2396 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2397 if (inp == NULL) { 2398 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2399 SCTP_INP_INFO_WUNLOCK(); 2400 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2401 return (ENOBUFS); 2402 } 2403 /* zap it */ 2404 memset(inp, 0, sizeof(*inp)); 2405 2406 /* bump generations */ 2407 /* setup socket pointers */ 2408 inp->sctp_socket = so; 2409 inp->ip_inp.inp.inp_socket = so; 2410 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2411 #ifdef INET6 2412 if (INP_SOCKAF(so) == AF_INET6) { 2413 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2414 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2415 } 2416 if (MODULE_GLOBAL(ip6_v6only)) { 2417 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2418 } 2419 } 2420 #endif 2421 inp->sctp_associd_counter = 1; 2422 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2423 inp->sctp_frag_point = 0; 2424 inp->max_cwnd = 0; 2425 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2426 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2427 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2428 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2429 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2430 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2431 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2432 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2433 inp->idata_supported = 0; 2434 inp->rcv_edmid = SCTP_EDMID_NONE; 2435 2436 inp->fibnum = so->so_fibnum; 2437 /* init the small hash table we use to track asocid <-> tcb */ 2438 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2439 if (inp->sctp_asocidhash == NULL) { 2440 crfree(inp->ip_inp.inp.inp_cred); 2441 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2442 SCTP_INP_INFO_WUNLOCK(); 2443 return (ENOBUFS); 2444 } 2445 SCTP_INCR_EP_COUNT(); 2446 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2447 SCTP_INP_INFO_WUNLOCK(); 2448 2449 so->so_pcb = (caddr_t)inp; 2450 2451 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2452 /* UDP style socket */ 2453 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2454 SCTP_PCB_FLAGS_UNBOUND); 2455 /* Be sure it is NON-BLOCKING IO for UDP */ 2456 /* SCTP_SET_SO_NBIO(so); */ 2457 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2458 /* TCP style socket */ 2459 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2460 SCTP_PCB_FLAGS_UNBOUND); 2461 /* Be sure we have blocking IO by default */ 2462 SOCK_LOCK(so); 2463 SCTP_CLEAR_SO_NBIO(so); 2464 SOCK_UNLOCK(so); 2465 } else { 2466 /* 2467 * unsupported socket type (RAW, etc)- in case we missed it 2468 * in protosw 2469 */ 2470 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2471 so->so_pcb = NULL; 2472 crfree(inp->ip_inp.inp.inp_cred); 2473 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2474 return (EOPNOTSUPP); 2475 } 2476 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2477 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2478 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2479 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2480 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2481 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2482 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2483 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2484 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2485 } 2486 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2487 &inp->sctp_hashmark); 2488 if (inp->sctp_tcbhash == NULL) { 2489 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2490 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2491 so->so_pcb = NULL; 2492 crfree(inp->ip_inp.inp.inp_cred); 2493 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2494 return (ENOBUFS); 2495 } 2496 inp->def_vrf_id = vrf_id; 2497 2498 SCTP_INP_INFO_WLOCK(); 2499 SCTP_INP_LOCK_INIT(inp); 2500 rw_init_flags(&inp->ip_inp.inp.inp_lock, "sctpinp", 2501 RW_RECURSE | RW_DUPOK); 2502 SCTP_INP_READ_LOCK_INIT(inp); 2503 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2504 /* lock the new ep */ 2505 SCTP_INP_WLOCK(inp); 2506 2507 /* add it to the info area */ 2508 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2509 SCTP_INP_INFO_WUNLOCK(); 2510 2511 TAILQ_INIT(&inp->read_queue); 2512 LIST_INIT(&inp->sctp_addr_list); 2513 2514 LIST_INIT(&inp->sctp_asoc_list); 2515 2516 #ifdef SCTP_TRACK_FREED_ASOCS 2517 /* TEMP CODE */ 2518 LIST_INIT(&inp->sctp_asoc_free_list); 2519 #endif 2520 /* Init the timer structure for signature change */ 2521 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2522 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2523 2524 /* now init the actual endpoint default data */ 2525 m = &inp->sctp_ep; 2526 2527 /* setup the base timeout information */ 2528 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2529 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2530 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2531 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2532 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2533 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2534 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2535 /* all max/min max are in ms */ 2536 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2537 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2538 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2539 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2540 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2541 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2542 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2543 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2544 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2545 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2546 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2547 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2548 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2549 2550 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2551 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2552 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2553 /* number of streams to pre-open on a association */ 2554 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2555 2556 m->default_mtu = 0; 2557 /* Add adaptation cookie */ 2558 m->adaptation_layer_indicator = 0; 2559 m->adaptation_layer_indicator_provided = 0; 2560 2561 /* seed random number generator */ 2562 m->random_counter = 1; 2563 m->store_at = SCTP_SIGNATURE_SIZE; 2564 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2565 sctp_fill_random_store(m); 2566 2567 /* Minimum cookie size */ 2568 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2569 sizeof(struct sctp_state_cookie); 2570 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2571 2572 /* Setup the initial secret */ 2573 (void)SCTP_GETTIME_TIMEVAL(&time); 2574 m->time_of_secret_change = (unsigned int)time.tv_sec; 2575 2576 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2577 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2578 } 2579 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2580 2581 /* How long is a cookie good for ? */ 2582 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2583 /* 2584 * Initialize authentication parameters 2585 */ 2586 m->local_hmacs = sctp_default_supported_hmaclist(); 2587 m->local_auth_chunks = sctp_alloc_chunklist(); 2588 if (inp->asconf_supported) { 2589 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2590 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2591 } 2592 m->default_dscp = 0; 2593 #ifdef INET6 2594 m->default_flowlabel = 0; 2595 #endif 2596 m->port = 0; /* encapsulation disabled by default */ 2597 LIST_INIT(&m->shared_keys); 2598 /* add default NULL key as key id 0 */ 2599 null_key = sctp_alloc_sharedkey(); 2600 sctp_insert_sharedkey(&m->shared_keys, null_key); 2601 SCTP_INP_WUNLOCK(inp); 2602 #ifdef SCTP_LOG_CLOSING 2603 sctp_log_closing(inp, NULL, 12); 2604 #endif 2605 return (error); 2606 } 2607 2608 void 2609 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2610 struct sctp_tcb *stcb) 2611 { 2612 struct sctp_nets *net; 2613 uint16_t lport, rport; 2614 struct sctppcbhead *head; 2615 struct sctp_laddr *laddr, *oladdr; 2616 2617 atomic_add_int(&stcb->asoc.refcnt, 1); 2618 SCTP_TCB_UNLOCK(stcb); 2619 SCTP_INP_INFO_WLOCK(); 2620 SCTP_INP_WLOCK(old_inp); 2621 SCTP_INP_WLOCK(new_inp); 2622 SCTP_TCB_LOCK(stcb); 2623 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2624 2625 #ifdef INET6 2626 if (old_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2627 new_inp->ip_inp.inp.inp_flags |= old_inp->ip_inp.inp.inp_flags & INP_CONTROLOPTS; 2628 if (old_inp->ip_inp.inp.in6p_outputopts) { 2629 new_inp->ip_inp.inp.in6p_outputopts = ip6_copypktopts(old_inp->ip_inp.inp.in6p_outputopts, M_NOWAIT); 2630 } 2631 } 2632 #endif 2633 #if defined(INET) && defined(INET6) 2634 else 2635 #endif 2636 #ifdef INET 2637 { 2638 new_inp->ip_inp.inp.inp_ip_tos = old_inp->ip_inp.inp.inp_ip_tos; 2639 new_inp->ip_inp.inp.inp_ip_ttl = old_inp->ip_inp.inp.inp_ip_ttl; 2640 } 2641 #endif 2642 new_inp->sctp_ep.time_of_secret_change = 2643 old_inp->sctp_ep.time_of_secret_change; 2644 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2645 sizeof(old_inp->sctp_ep.secret_key)); 2646 new_inp->sctp_ep.current_secret_number = 2647 old_inp->sctp_ep.current_secret_number; 2648 new_inp->sctp_ep.last_secret_number = 2649 old_inp->sctp_ep.last_secret_number; 2650 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2651 2652 /* make it so new data pours into the new socket */ 2653 stcb->sctp_socket = new_inp->sctp_socket; 2654 stcb->sctp_ep = new_inp; 2655 2656 /* Copy the port across */ 2657 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2658 rport = stcb->rport; 2659 /* Pull the tcb from the old association */ 2660 LIST_REMOVE(stcb, sctp_tcbhash); 2661 LIST_REMOVE(stcb, sctp_tcblist); 2662 if (stcb->asoc.in_asocid_hash) { 2663 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2664 } 2665 /* Now insert the new_inp into the TCP connected hash */ 2666 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2667 2668 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2669 /* Its safe to access */ 2670 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2671 2672 /* Now move the tcb into the endpoint list */ 2673 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2674 /* 2675 * Question, do we even need to worry about the ep-hash since we 2676 * only have one connection? Probably not :> so lets get rid of it 2677 * and not suck up any kernel memory in that. 2678 */ 2679 if (stcb->asoc.in_asocid_hash) { 2680 struct sctpasochead *lhd; 2681 2682 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2683 new_inp->hashasocidmark)]; 2684 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2685 } 2686 /* Ok. Let's restart timer. */ 2687 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2688 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2689 stcb, net); 2690 } 2691 2692 SCTP_INP_INFO_WUNLOCK(); 2693 if (new_inp->sctp_tcbhash != NULL) { 2694 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2695 new_inp->sctp_tcbhash = NULL; 2696 } 2697 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2698 /* Subset bound, so copy in the laddr list from the old_inp */ 2699 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2700 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2701 if (laddr == NULL) { 2702 /* 2703 * Gak, what can we do? This assoc is really 2704 * HOSED. We probably should send an abort 2705 * here. 2706 */ 2707 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2708 continue; 2709 } 2710 SCTP_INCR_LADDR_COUNT(); 2711 memset(laddr, 0, sizeof(*laddr)); 2712 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2713 laddr->ifa = oladdr->ifa; 2714 atomic_add_int(&laddr->ifa->refcount, 1); 2715 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2716 sctp_nxt_addr); 2717 new_inp->laddr_count++; 2718 if (oladdr == stcb->asoc.last_used_address) { 2719 stcb->asoc.last_used_address = laddr; 2720 } 2721 } 2722 } 2723 /* Now any running timers need to be adjusted. */ 2724 if (stcb->asoc.dack_timer.ep == old_inp) { 2725 SCTP_INP_DECR_REF(old_inp); 2726 stcb->asoc.dack_timer.ep = new_inp; 2727 SCTP_INP_INCR_REF(new_inp); 2728 } 2729 if (stcb->asoc.asconf_timer.ep == old_inp) { 2730 SCTP_INP_DECR_REF(old_inp); 2731 stcb->asoc.asconf_timer.ep = new_inp; 2732 SCTP_INP_INCR_REF(new_inp); 2733 } 2734 if (stcb->asoc.strreset_timer.ep == old_inp) { 2735 SCTP_INP_DECR_REF(old_inp); 2736 stcb->asoc.strreset_timer.ep = new_inp; 2737 SCTP_INP_INCR_REF(new_inp); 2738 } 2739 if (stcb->asoc.shut_guard_timer.ep == old_inp) { 2740 SCTP_INP_DECR_REF(old_inp); 2741 stcb->asoc.shut_guard_timer.ep = new_inp; 2742 SCTP_INP_INCR_REF(new_inp); 2743 } 2744 if (stcb->asoc.autoclose_timer.ep == old_inp) { 2745 SCTP_INP_DECR_REF(old_inp); 2746 stcb->asoc.autoclose_timer.ep = new_inp; 2747 SCTP_INP_INCR_REF(new_inp); 2748 } 2749 if (stcb->asoc.delete_prim_timer.ep == old_inp) { 2750 SCTP_INP_DECR_REF(old_inp); 2751 stcb->asoc.delete_prim_timer.ep = new_inp; 2752 SCTP_INP_INCR_REF(new_inp); 2753 } 2754 /* now what about the nets? */ 2755 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2756 if (net->pmtu_timer.ep == old_inp) { 2757 SCTP_INP_DECR_REF(old_inp); 2758 net->pmtu_timer.ep = new_inp; 2759 SCTP_INP_INCR_REF(new_inp); 2760 } 2761 if (net->hb_timer.ep == old_inp) { 2762 SCTP_INP_DECR_REF(old_inp); 2763 net->hb_timer.ep = new_inp; 2764 SCTP_INP_INCR_REF(new_inp); 2765 } 2766 if (net->rxt_timer.ep == old_inp) { 2767 SCTP_INP_DECR_REF(old_inp); 2768 net->rxt_timer.ep = new_inp; 2769 SCTP_INP_INCR_REF(new_inp); 2770 } 2771 } 2772 SCTP_INP_WUNLOCK(new_inp); 2773 SCTP_INP_WUNLOCK(old_inp); 2774 } 2775 2776 /* 2777 * insert an laddr entry with the given ifa for the desired list 2778 */ 2779 static int 2780 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2781 { 2782 struct sctp_laddr *laddr; 2783 2784 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2785 if (laddr == NULL) { 2786 /* out of memory? */ 2787 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2788 return (EINVAL); 2789 } 2790 SCTP_INCR_LADDR_COUNT(); 2791 memset(laddr, 0, sizeof(*laddr)); 2792 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2793 laddr->ifa = ifa; 2794 laddr->action = act; 2795 atomic_add_int(&ifa->refcount, 1); 2796 /* insert it */ 2797 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2798 2799 return (0); 2800 } 2801 2802 /* 2803 * Remove an laddr entry from the local address list (on an assoc) 2804 */ 2805 static void 2806 sctp_remove_laddr(struct sctp_laddr *laddr) 2807 { 2808 2809 /* remove from the list */ 2810 LIST_REMOVE(laddr, sctp_nxt_addr); 2811 sctp_free_ifa(laddr->ifa); 2812 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2813 SCTP_DECR_LADDR_COUNT(); 2814 } 2815 2816 /* 2817 * Bind the socket, with the PCB and global info locks held. Note, if a 2818 * socket address is specified, the PCB lock may be dropped and re-acquired. 2819 * 2820 * sctp_ifap is used to bypass normal local address validation checks. 2821 */ 2822 int 2823 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr, 2824 struct sctp_ifa *sctp_ifap, struct thread *td) 2825 { 2826 /* bind a ep to a socket address */ 2827 struct sctppcbhead *head; 2828 struct sctp_inpcb *inp_tmp; 2829 struct inpcb *ip_inp; 2830 int port_reuse_active = 0; 2831 int bindall; 2832 uint16_t lport; 2833 int error; 2834 uint32_t vrf_id; 2835 2836 KASSERT(td != NULL, ("%s: null thread", __func__)); 2837 2838 error = 0; 2839 lport = 0; 2840 bindall = 1; 2841 ip_inp = &inp->ip_inp.inp; 2842 2843 SCTP_INP_INFO_WLOCK_ASSERT(); 2844 SCTP_INP_WLOCK_ASSERT(inp); 2845 2846 #ifdef SCTP_DEBUG 2847 if (addr) { 2848 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2849 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2850 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2851 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2852 } 2853 #endif 2854 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2855 error = EINVAL; 2856 /* already did a bind, subsequent binds NOT allowed ! */ 2857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2858 goto out; 2859 } 2860 if (addr != NULL) { 2861 switch (addr->sa_family) { 2862 #ifdef INET 2863 case AF_INET: 2864 { 2865 struct sockaddr_in *sin; 2866 2867 /* IPV6_V6ONLY socket? */ 2868 if (SCTP_IPV6_V6ONLY(inp)) { 2869 error = EINVAL; 2870 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2871 goto out; 2872 } 2873 if (addr->sa_len != sizeof(*sin)) { 2874 error = EINVAL; 2875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2876 goto out; 2877 } 2878 2879 sin = (struct sockaddr_in *)addr; 2880 lport = sin->sin_port; 2881 /* 2882 * For LOOPBACK the prison_local_ip4() call 2883 * will transmute the ip address to the 2884 * proper value. 2885 */ 2886 if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) { 2887 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2888 goto out; 2889 } 2890 if (sin->sin_addr.s_addr != INADDR_ANY) { 2891 bindall = 0; 2892 } 2893 break; 2894 } 2895 #endif 2896 #ifdef INET6 2897 case AF_INET6: 2898 { 2899 /* 2900 * Only for pure IPv6 Address. (No IPv4 2901 * Mapped!) 2902 */ 2903 struct sockaddr_in6 *sin6; 2904 2905 sin6 = (struct sockaddr_in6 *)addr; 2906 if (addr->sa_len != sizeof(*sin6)) { 2907 error = EINVAL; 2908 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2909 goto out; 2910 } 2911 lport = sin6->sin6_port; 2912 /* 2913 * For LOOPBACK the prison_local_ip6() call 2914 * will transmute the ipv6 address to the 2915 * proper value. 2916 */ 2917 if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr, 2918 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2919 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2920 goto out; 2921 } 2922 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2923 bindall = 0; 2924 /* KAME hack: embed scopeid */ 2925 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2926 error = EINVAL; 2927 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2928 goto out; 2929 } 2930 } 2931 /* this must be cleared for ifa_ifwithaddr() */ 2932 sin6->sin6_scope_id = 0; 2933 break; 2934 } 2935 #endif 2936 default: 2937 error = EAFNOSUPPORT; 2938 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2939 goto out; 2940 } 2941 } 2942 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2943 vrf_id = inp->def_vrf_id; 2944 2945 if (lport) { 2946 /* 2947 * Did the caller specify a port? if so we must see if an ep 2948 * already has this one bound. 2949 */ 2950 /* got to be root to get at low ports */ 2951 if (ntohs(lport) < IPPORT_RESERVED && 2952 (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 2953 goto out; 2954 } 2955 SCTP_INP_INCR_REF(inp); 2956 SCTP_INP_WUNLOCK(inp); 2957 if (bindall) { 2958 vrf_id = inp->def_vrf_id; 2959 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2960 if (inp_tmp != NULL) { 2961 /* 2962 * lock guy returned and lower count note 2963 * that we are not bound so inp_tmp should 2964 * NEVER be inp. And it is this inp 2965 * (inp_tmp) that gets the reference bump, 2966 * so we must lower it. 2967 */ 2968 SCTP_INP_DECR_REF(inp_tmp); 2969 /* unlock info */ 2970 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2971 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2972 /* 2973 * Ok, must be one-2-one and 2974 * allowing port re-use 2975 */ 2976 port_reuse_active = 1; 2977 goto continue_anyway; 2978 } 2979 SCTP_INP_WLOCK(inp); 2980 SCTP_INP_DECR_REF(inp); 2981 error = EADDRINUSE; 2982 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2983 goto out; 2984 } 2985 } else { 2986 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2987 if (inp_tmp != NULL) { 2988 /* 2989 * lock guy returned and lower count note 2990 * that we are not bound so inp_tmp should 2991 * NEVER be inp. And it is this inp 2992 * (inp_tmp) that gets the reference bump, 2993 * so we must lower it. 2994 */ 2995 SCTP_INP_DECR_REF(inp_tmp); 2996 /* unlock info */ 2997 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2998 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2999 /* 3000 * Ok, must be one-2-one and 3001 * allowing port re-use 3002 */ 3003 port_reuse_active = 1; 3004 goto continue_anyway; 3005 } 3006 SCTP_INP_WLOCK(inp); 3007 SCTP_INP_DECR_REF(inp); 3008 error = EADDRINUSE; 3009 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3010 goto out; 3011 } 3012 } 3013 continue_anyway: 3014 SCTP_INP_WLOCK(inp); 3015 SCTP_INP_DECR_REF(inp); 3016 if (bindall) { 3017 /* verify that no lport is not used by a singleton */ 3018 if ((port_reuse_active == 0) && 3019 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3020 /* Sorry someone already has this one bound */ 3021 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3022 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3023 port_reuse_active = 1; 3024 } else { 3025 error = EADDRINUSE; 3026 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3027 goto out; 3028 } 3029 } 3030 } 3031 } else { 3032 uint16_t first, last, candidate; 3033 uint16_t count; 3034 3035 if (ip_inp->inp_flags & INP_HIGHPORT) { 3036 first = MODULE_GLOBAL(ipport_hifirstauto); 3037 last = MODULE_GLOBAL(ipport_hilastauto); 3038 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3039 if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 3040 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3041 goto out; 3042 } 3043 first = MODULE_GLOBAL(ipport_lowfirstauto); 3044 last = MODULE_GLOBAL(ipport_lowlastauto); 3045 } else { 3046 first = MODULE_GLOBAL(ipport_firstauto); 3047 last = MODULE_GLOBAL(ipport_lastauto); 3048 } 3049 if (first > last) { 3050 uint16_t temp; 3051 3052 temp = first; 3053 first = last; 3054 last = temp; 3055 } 3056 count = last - first + 1; /* number of candidates */ 3057 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3058 3059 for (;;) { 3060 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3061 lport = htons(candidate); 3062 break; 3063 } 3064 if (--count == 0) { 3065 error = EADDRINUSE; 3066 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3067 goto out; 3068 } 3069 if (candidate == last) 3070 candidate = first; 3071 else 3072 candidate = candidate + 1; 3073 } 3074 } 3075 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3076 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3077 /* 3078 * this really should not happen. The guy did a non-blocking 3079 * bind and then did a close at the same time. 3080 */ 3081 error = EINVAL; 3082 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3083 goto out; 3084 } 3085 /* ok we look clear to give out this port, so lets setup the binding */ 3086 if (bindall) { 3087 /* binding to all addresses, so just set in the proper flags */ 3088 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3089 /* set the automatic addr changes from kernel flag */ 3090 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3091 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3092 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3093 } else { 3094 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3095 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3096 } 3097 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3098 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3099 } else { 3100 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3101 } 3102 /* 3103 * set the automatic mobility_base from kernel flag (by 3104 * micchie) 3105 */ 3106 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3107 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3109 } else { 3110 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3111 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3112 } 3113 /* 3114 * set the automatic mobility_fasthandoff from kernel flag 3115 * (by micchie) 3116 */ 3117 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3118 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3119 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3120 } else { 3121 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3122 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3123 } 3124 } else { 3125 /* 3126 * bind specific, make sure flags is off and add a new 3127 * address structure to the sctp_addr_list inside the ep 3128 * structure. 3129 * 3130 * We will need to allocate one and insert it at the head. 3131 * The socketopt call can just insert new addresses in there 3132 * as well. It will also have to do the embed scope kame 3133 * hack too (before adding). 3134 */ 3135 struct sctp_ifa *ifa; 3136 union sctp_sockstore store; 3137 3138 memset(&store, 0, sizeof(store)); 3139 switch (addr->sa_family) { 3140 #ifdef INET 3141 case AF_INET: 3142 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3143 store.sin.sin_port = 0; 3144 break; 3145 #endif 3146 #ifdef INET6 3147 case AF_INET6: 3148 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3149 store.sin6.sin6_port = 0; 3150 break; 3151 #endif 3152 default: 3153 break; 3154 } 3155 /* 3156 * first find the interface with the bound address need to 3157 * zero out the port to find the address! yuck! can't do 3158 * this earlier since need port for sctp_pcb_findep() 3159 */ 3160 if (sctp_ifap != NULL) { 3161 ifa = sctp_ifap; 3162 } else { 3163 /* 3164 * Note for BSD we hit here always other O/S's will 3165 * pass things in via the sctp_ifap argument. 3166 */ 3167 ifa = sctp_find_ifa_by_addr(&store.sa, 3168 vrf_id, SCTP_ADDR_NOT_LOCKED); 3169 } 3170 if (ifa == NULL) { 3171 error = EADDRNOTAVAIL; 3172 /* Can't find an interface with that address */ 3173 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3174 goto out; 3175 } 3176 #ifdef INET6 3177 if (addr->sa_family == AF_INET6) { 3178 /* GAK, more FIXME IFA lock? */ 3179 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3180 /* Can't bind a non-existent addr. */ 3181 error = EINVAL; 3182 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3183 goto out; 3184 } 3185 } 3186 #endif 3187 /* we're not bound all */ 3188 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3189 /* allow bindx() to send ASCONF's for binding changes */ 3190 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3191 /* clear automatic addr changes from kernel flag */ 3192 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3193 3194 /* add this address to the endpoint list */ 3195 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3196 if (error != 0) 3197 goto out; 3198 inp->laddr_count++; 3199 } 3200 /* find the bucket */ 3201 if (port_reuse_active) { 3202 /* Put it into tcp 1-2-1 hash */ 3203 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3204 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3205 } else { 3206 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3207 } 3208 /* put it in the bucket */ 3209 LIST_INSERT_HEAD(head, inp, sctp_hash); 3210 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3211 (void *)head, ntohs(lport), port_reuse_active); 3212 /* set in the port */ 3213 inp->sctp_lport = lport; 3214 3215 /* turn off just the unbound flag */ 3216 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0, 3217 ("%s: inp %p is already bound", __func__, inp)); 3218 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3219 out: 3220 return (error); 3221 } 3222 3223 int 3224 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 3225 struct sctp_ifa *sctp_ifap, struct thread *td) 3226 { 3227 struct sctp_inpcb *inp; 3228 int error; 3229 3230 inp = so->so_pcb; 3231 SCTP_INP_INFO_WLOCK(); 3232 SCTP_INP_WLOCK(inp); 3233 error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td); 3234 SCTP_INP_WUNLOCK(inp); 3235 SCTP_INP_INFO_WUNLOCK(); 3236 return (error); 3237 } 3238 3239 static void 3240 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3241 { 3242 struct sctp_iterator *it, *nit; 3243 3244 /* 3245 * We enter with the only the ITERATOR_LOCK in place and a write 3246 * lock on the inp_info stuff. 3247 */ 3248 it = sctp_it_ctl.cur_it; 3249 if (it && (it->vn != curvnet)) { 3250 /* Its not looking at our VNET */ 3251 return; 3252 } 3253 if (it && (it->inp == inp)) { 3254 /* 3255 * This is tricky and we hold the iterator lock, but when it 3256 * returns and gets the lock (when we release it) the 3257 * iterator will try to operate on inp. We need to stop that 3258 * from happening. But of course the iterator has a 3259 * reference on the stcb and inp. We can mark it and it will 3260 * stop. 3261 * 3262 * If its a single iterator situation, we set the end 3263 * iterator flag. Otherwise we set the iterator to go to the 3264 * next inp. 3265 * 3266 */ 3267 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3268 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3269 } else { 3270 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3271 } 3272 } 3273 /* 3274 * Now go through and remove any single reference to our inp that 3275 * may be still pending on the list 3276 */ 3277 SCTP_IPI_ITERATOR_WQ_LOCK(); 3278 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3279 if (it->vn != curvnet) { 3280 continue; 3281 } 3282 if (it->inp == inp) { 3283 /* This one points to me is it inp specific? */ 3284 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3285 /* Remove and free this one */ 3286 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3287 it, sctp_nxt_itr); 3288 if (it->function_atend != NULL) { 3289 (*it->function_atend) (it->pointer, it->val); 3290 } 3291 SCTP_FREE(it, SCTP_M_ITER); 3292 } else { 3293 it->inp = LIST_NEXT(it->inp, sctp_list); 3294 if (it->inp) { 3295 SCTP_INP_INCR_REF(it->inp); 3296 } 3297 } 3298 /* 3299 * When its put in the refcnt is incremented so decr 3300 * it 3301 */ 3302 SCTP_INP_DECR_REF(inp); 3303 } 3304 } 3305 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3306 } 3307 3308 /* release sctp_inpcb unbind the port */ 3309 void 3310 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3311 { 3312 /* 3313 * Here we free a endpoint. We must find it (if it is in the Hash 3314 * table) and remove it from there. Then we must also find it in the 3315 * overall list and remove it from there. After all removals are 3316 * complete then any timer has to be stopped. Then start the actual 3317 * freeing. a) Any local lists. b) Any associations. c) The hash of 3318 * all associations. d) finally the ep itself. 3319 */ 3320 struct sctp_tcb *stcb, *nstcb; 3321 struct sctp_laddr *laddr, *nladdr; 3322 struct inpcb *ip_pcb; 3323 struct socket *so; 3324 int being_refed = 0; 3325 struct sctp_queued_to_read *sq, *nsq; 3326 int cnt; 3327 sctp_sharedkey_t *shared_key, *nshared_key; 3328 3329 #ifdef SCTP_LOG_CLOSING 3330 sctp_log_closing(inp, NULL, 0); 3331 #endif 3332 SCTP_ITERATOR_LOCK(); 3333 /* mark any iterators on the list or being processed */ 3334 sctp_iterator_inp_being_freed(inp); 3335 SCTP_ITERATOR_UNLOCK(); 3336 3337 SCTP_ASOC_CREATE_LOCK(inp); 3338 SCTP_INP_INFO_WLOCK(); 3339 SCTP_INP_WLOCK(inp); 3340 so = inp->sctp_socket; 3341 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0, 3342 ("%s: inp %p still has socket", __func__, inp)); 3343 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0, 3344 ("%s: double free of inp %p", __func__, inp)); 3345 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3346 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3347 /* socket is gone, so no more wakeups allowed */ 3348 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3349 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3350 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3351 } 3352 /* First time through we have the socket lock, after that no more. */ 3353 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3354 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3355 3356 if (inp->control) { 3357 sctp_m_freem(inp->control); 3358 inp->control = NULL; 3359 } 3360 if (inp->pkt) { 3361 sctp_m_freem(inp->pkt); 3362 inp->pkt = NULL; 3363 } 3364 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3365 * here but I will be nice :> (i.e. 3366 * ip_pcb = ep;) */ 3367 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3368 int cnt_in_sd; 3369 3370 cnt_in_sd = 0; 3371 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) { 3372 SCTP_TCB_LOCK(stcb); 3373 /* Disconnect the socket please. */ 3374 stcb->sctp_socket = NULL; 3375 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET); 3376 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3377 /* Skip guys being freed */ 3378 cnt_in_sd++; 3379 if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3380 /* 3381 * Special case - we did not start a 3382 * kill timer on the asoc due to it 3383 * was not closed. So go ahead and 3384 * start it now. 3385 */ 3386 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 3387 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3388 } 3389 SCTP_TCB_UNLOCK(stcb); 3390 continue; 3391 } 3392 if (((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) || 3393 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) && 3394 (stcb->asoc.total_output_queue_size == 0)) { 3395 /* 3396 * If we have data in queue, we don't want 3397 * to just free since the app may have done, 3398 * send()/close or connect/send/close. And 3399 * it wants the data to get across first. 3400 */ 3401 /* Just abandon things in the front states */ 3402 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_NOFORCE, 3403 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3404 cnt_in_sd++; 3405 } 3406 continue; 3407 } 3408 if ((stcb->asoc.size_on_reasm_queue > 0) || 3409 (stcb->asoc.control_pdapi) || 3410 (stcb->asoc.size_on_all_streams > 0) || 3411 ((so != NULL) && (SCTP_SBAVAIL(&so->so_rcv) > 0))) { 3412 /* Left with Data unread */ 3413 struct mbuf *op_err; 3414 3415 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3416 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3417 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); 3418 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3419 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3420 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3421 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3422 } 3423 if (sctp_free_assoc(inp, stcb, 3424 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3425 cnt_in_sd++; 3426 } 3427 continue; 3428 } else if (TAILQ_EMPTY(&stcb->asoc.send_queue) && 3429 TAILQ_EMPTY(&stcb->asoc.sent_queue) && 3430 (stcb->asoc.stream_queue_cnt == 0)) { 3431 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) { 3432 goto abort_anyway; 3433 } 3434 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) && 3435 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3436 struct sctp_nets *netp; 3437 3438 /* 3439 * there is nothing queued to send, 3440 * so I send shutdown 3441 */ 3442 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3443 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3444 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3445 } 3446 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT); 3447 sctp_stop_timers_for_shutdown(stcb); 3448 if (stcb->asoc.alternate) { 3449 netp = stcb->asoc.alternate; 3450 } else { 3451 netp = stcb->asoc.primary_destination; 3452 } 3453 sctp_send_shutdown(stcb, netp); 3454 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 3455 netp); 3456 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL); 3457 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3458 } 3459 } else { 3460 /* mark into shutdown pending */ 3461 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING); 3462 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) { 3463 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT); 3464 } 3465 if (TAILQ_EMPTY(&stcb->asoc.send_queue) && 3466 TAILQ_EMPTY(&stcb->asoc.sent_queue) && 3467 (stcb->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3468 struct mbuf *op_err; 3469 3470 abort_anyway: 3471 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3472 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3473 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); 3474 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3475 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3476 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3477 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3478 } 3479 if (sctp_free_assoc(inp, stcb, 3480 SCTP_PCBFREE_NOFORCE, 3481 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3482 cnt_in_sd++; 3483 } 3484 continue; 3485 } else { 3486 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3487 } 3488 } 3489 cnt_in_sd++; 3490 SCTP_TCB_UNLOCK(stcb); 3491 } 3492 /* now is there some left in our SHUTDOWN state? */ 3493 if (cnt_in_sd) { 3494 #ifdef SCTP_LOG_CLOSING 3495 sctp_log_closing(inp, NULL, 2); 3496 #endif 3497 inp->sctp_socket = NULL; 3498 SCTP_INP_WUNLOCK(inp); 3499 SCTP_ASOC_CREATE_UNLOCK(inp); 3500 SCTP_INP_INFO_WUNLOCK(); 3501 return; 3502 } 3503 } 3504 inp->sctp_socket = NULL; 3505 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 3506 /* 3507 * ok, this guy has been bound. It's port is somewhere in 3508 * the SCTP_BASE_INFO(hash table). Remove it! 3509 */ 3510 LIST_REMOVE(inp, sctp_hash); 3511 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3512 } 3513 3514 /* 3515 * If there is a timer running to kill us, forget it, since it may 3516 * have a contest on the INP lock.. which would cause us to die ... 3517 */ 3518 cnt = 0; 3519 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) { 3520 SCTP_TCB_LOCK(stcb); 3521 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3522 /* Disconnect the socket please */ 3523 stcb->sctp_socket = NULL; 3524 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET); 3525 } 3526 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3527 if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3528 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 3529 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3530 } 3531 cnt++; 3532 SCTP_TCB_UNLOCK(stcb); 3533 continue; 3534 } 3535 /* Free associations that are NOT killing us */ 3536 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) && 3537 ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3538 struct mbuf *op_err; 3539 3540 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3541 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3542 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); 3543 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3544 } else if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3545 cnt++; 3546 SCTP_TCB_UNLOCK(stcb); 3547 continue; 3548 } 3549 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3550 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3551 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3552 } 3553 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, 3554 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3555 cnt++; 3556 } 3557 } 3558 if (cnt) { 3559 /* Ok we have someone out there that will kill us */ 3560 #ifdef SCTP_LOG_CLOSING 3561 sctp_log_closing(inp, NULL, 3); 3562 #endif 3563 SCTP_INP_WUNLOCK(inp); 3564 SCTP_ASOC_CREATE_UNLOCK(inp); 3565 SCTP_INP_INFO_WUNLOCK(); 3566 return; 3567 } 3568 if (SCTP_INP_LOCK_CONTENDED(inp)) 3569 being_refed++; 3570 if (SCTP_INP_READ_CONTENDED(inp)) 3571 being_refed++; 3572 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3573 being_refed++; 3574 /* NOTE: 0 refcount also means no timers are referencing us. */ 3575 if ((inp->refcount) || 3576 (being_refed) || 3577 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3578 #ifdef SCTP_LOG_CLOSING 3579 sctp_log_closing(inp, NULL, 4); 3580 #endif 3581 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3582 SCTP_INP_WUNLOCK(inp); 3583 SCTP_ASOC_CREATE_UNLOCK(inp); 3584 SCTP_INP_INFO_WUNLOCK(); 3585 return; 3586 } 3587 inp->sctp_ep.signature_change.type = 0; 3588 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3589 /* 3590 * Remove it from the list .. last thing we need a lock for. 3591 */ 3592 LIST_REMOVE(inp, sctp_list); 3593 SCTP_INP_WUNLOCK(inp); 3594 SCTP_ASOC_CREATE_UNLOCK(inp); 3595 SCTP_INP_INFO_WUNLOCK(); 3596 3597 #ifdef SCTP_LOG_CLOSING 3598 sctp_log_closing(inp, NULL, 5); 3599 #endif 3600 if ((inp->sctp_asocidhash) != NULL) { 3601 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3602 inp->sctp_asocidhash = NULL; 3603 } 3604 /* sa_ignore FREED_MEMORY */ 3605 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3606 /* Its only abandoned if it had data left */ 3607 if (sq->length) 3608 SCTP_STAT_INCR(sctps_left_abandon); 3609 3610 TAILQ_REMOVE(&inp->read_queue, sq, next); 3611 sctp_free_remote_addr(sq->whoFrom); 3612 if (so) 3613 SCTP_SB_DECR(&so->so_rcv, sq->length); 3614 if (sq->data) { 3615 sctp_m_freem(sq->data); 3616 sq->data = NULL; 3617 } 3618 /* 3619 * no need to free the net count, since at this point all 3620 * assoc's are gone. 3621 */ 3622 sctp_free_a_readq(NULL, sq); 3623 } 3624 /* Now the sctp_pcb things */ 3625 /* 3626 * free each asoc if it is not already closed/free. we can't use the 3627 * macro here since le_next will get freed as part of the 3628 * sctp_free_assoc() call. 3629 */ 3630 if (ip_pcb->inp_options) { 3631 (void)sctp_m_free(ip_pcb->inp_options); 3632 ip_pcb->inp_options = 0; 3633 } 3634 #ifdef INET6 3635 if (ip_pcb->inp_vflag & INP_IPV6) { 3636 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3637 } 3638 #endif /* INET6 */ 3639 ip_pcb->inp_vflag = 0; 3640 /* free up authentication fields */ 3641 if (inp->sctp_ep.local_auth_chunks != NULL) 3642 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3643 if (inp->sctp_ep.local_hmacs != NULL) 3644 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3645 3646 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3647 LIST_REMOVE(shared_key, next); 3648 sctp_free_sharedkey(shared_key); 3649 /* sa_ignore FREED_MEMORY */ 3650 } 3651 3652 /* 3653 * if we have an address list the following will free the list of 3654 * ifaddr's that are set into this ep. Again macro limitations here, 3655 * since the LIST_FOREACH could be a bad idea. 3656 */ 3657 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3658 sctp_remove_laddr(laddr); 3659 } 3660 3661 #ifdef SCTP_TRACK_FREED_ASOCS 3662 /* TEMP CODE */ 3663 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_free_list, sctp_tcblist, nstcb) { 3664 LIST_REMOVE(stcb, sctp_tcblist); 3665 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 3666 SCTP_DECR_ASOC_COUNT(); 3667 } 3668 /* *** END TEMP CODE *** */ 3669 #endif 3670 /* Now lets see about freeing the EP hash table. */ 3671 if (inp->sctp_tcbhash != NULL) { 3672 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3673 inp->sctp_tcbhash = NULL; 3674 } 3675 /* Now we must put the ep memory back into the zone pool */ 3676 crfree(inp->ip_inp.inp.inp_cred); 3677 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3678 SCTP_INP_LOCK_DESTROY(inp); 3679 SCTP_INP_READ_LOCK_DESTROY(inp); 3680 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3681 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3682 SCTP_DECR_EP_COUNT(); 3683 } 3684 3685 struct sctp_nets * 3686 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3687 { 3688 struct sctp_nets *net; 3689 3690 /* locate the address */ 3691 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3692 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3693 return (net); 3694 } 3695 return (NULL); 3696 } 3697 3698 int 3699 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3700 { 3701 struct sctp_ifa *sctp_ifa; 3702 3703 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3704 if (sctp_ifa) { 3705 return (1); 3706 } else { 3707 return (0); 3708 } 3709 } 3710 3711 /* 3712 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3713 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3714 * stats of stuff. 3715 */ 3716 int 3717 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3718 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3719 { 3720 /* 3721 * The following is redundant to the same lines in the 3722 * sctp_aloc_assoc() but is needed since others call the add address 3723 * function 3724 */ 3725 struct sctp_nets *net, *netfirst; 3726 int addr_inscope; 3727 3728 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3729 from); 3730 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3731 3732 netfirst = sctp_findnet(stcb, newaddr); 3733 if (netfirst) { 3734 /* 3735 * Lie and return ok, we don't want to make the association 3736 * go away for this behavior. It will happen in the TCP 3737 * model in a connected socket. It does not reach the hash 3738 * table until after the association is built so it can't be 3739 * found. Mark as reachable, since the initial creation will 3740 * have been cleared and the NOT_IN_ASSOC flag will have 3741 * been added... and we don't want to end up removing it 3742 * back out. 3743 */ 3744 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3745 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3746 SCTP_ADDR_UNCONFIRMED); 3747 } else { 3748 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3749 } 3750 3751 return (0); 3752 } 3753 addr_inscope = 1; 3754 switch (newaddr->sa_family) { 3755 #ifdef INET 3756 case AF_INET: 3757 { 3758 struct sockaddr_in *sin; 3759 3760 sin = (struct sockaddr_in *)newaddr; 3761 if (sin->sin_addr.s_addr == 0) { 3762 /* Invalid address */ 3763 return (-1); 3764 } 3765 /* zero out the zero area */ 3766 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3767 3768 /* assure len is set */ 3769 sin->sin_len = sizeof(struct sockaddr_in); 3770 if (set_scope) { 3771 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3772 stcb->asoc.scope.ipv4_local_scope = 1; 3773 } 3774 } else { 3775 /* Validate the address is in scope */ 3776 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3777 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3778 addr_inscope = 0; 3779 } 3780 } 3781 break; 3782 } 3783 #endif 3784 #ifdef INET6 3785 case AF_INET6: 3786 { 3787 struct sockaddr_in6 *sin6; 3788 3789 sin6 = (struct sockaddr_in6 *)newaddr; 3790 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3791 /* Invalid address */ 3792 return (-1); 3793 } 3794 /* assure len is set */ 3795 sin6->sin6_len = sizeof(struct sockaddr_in6); 3796 if (set_scope) { 3797 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3798 stcb->asoc.scope.loopback_scope = 1; 3799 stcb->asoc.scope.local_scope = 0; 3800 stcb->asoc.scope.ipv4_local_scope = 1; 3801 stcb->asoc.scope.site_scope = 1; 3802 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3803 /* 3804 * If the new destination is a 3805 * LINK_LOCAL we must have common 3806 * site scope. Don't set the local 3807 * scope since we may not share all 3808 * links, only loopback can do this. 3809 * Links on the local network would 3810 * also be on our private network 3811 * for v4 too. 3812 */ 3813 stcb->asoc.scope.ipv4_local_scope = 1; 3814 stcb->asoc.scope.site_scope = 1; 3815 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3816 /* 3817 * If the new destination is 3818 * SITE_LOCAL then we must have site 3819 * scope in common. 3820 */ 3821 stcb->asoc.scope.site_scope = 1; 3822 } 3823 } else { 3824 /* Validate the address is in scope */ 3825 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3826 (stcb->asoc.scope.loopback_scope == 0)) { 3827 addr_inscope = 0; 3828 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3829 (stcb->asoc.scope.local_scope == 0)) { 3830 addr_inscope = 0; 3831 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3832 (stcb->asoc.scope.site_scope == 0)) { 3833 addr_inscope = 0; 3834 } 3835 } 3836 break; 3837 } 3838 #endif 3839 default: 3840 /* not supported family type */ 3841 return (-1); 3842 } 3843 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3844 if (net == NULL) { 3845 return (-1); 3846 } 3847 SCTP_INCR_RADDR_COUNT(); 3848 memset(net, 0, sizeof(struct sctp_nets)); 3849 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3850 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3851 switch (newaddr->sa_family) { 3852 #ifdef INET 3853 case AF_INET: 3854 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3855 break; 3856 #endif 3857 #ifdef INET6 3858 case AF_INET6: 3859 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3860 break; 3861 #endif 3862 default: 3863 break; 3864 } 3865 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3866 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3867 stcb->asoc.scope.loopback_scope = 1; 3868 stcb->asoc.scope.ipv4_local_scope = 1; 3869 stcb->asoc.scope.local_scope = 0; 3870 stcb->asoc.scope.site_scope = 1; 3871 addr_inscope = 1; 3872 } 3873 net->failure_threshold = stcb->asoc.def_net_failure; 3874 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3875 if (addr_inscope == 0) { 3876 net->dest_state = (SCTP_ADDR_REACHABLE | 3877 SCTP_ADDR_OUT_OF_SCOPE); 3878 } else { 3879 if (from == SCTP_ADDR_IS_CONFIRMED) 3880 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3881 net->dest_state = SCTP_ADDR_REACHABLE; 3882 else 3883 net->dest_state = SCTP_ADDR_REACHABLE | 3884 SCTP_ADDR_UNCONFIRMED; 3885 } 3886 /* 3887 * We set this to 0, the timer code knows that this means its an 3888 * initial value 3889 */ 3890 net->rto_needed = 1; 3891 net->RTO = 0; 3892 net->RTO_measured = 0; 3893 stcb->asoc.numnets++; 3894 net->ref_count = 1; 3895 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3896 net->port = port; 3897 net->dscp = stcb->asoc.default_dscp; 3898 #ifdef INET6 3899 net->flowlabel = stcb->asoc.default_flowlabel; 3900 #endif 3901 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3902 net->dest_state |= SCTP_ADDR_NOHB; 3903 } else { 3904 net->dest_state &= ~SCTP_ADDR_NOHB; 3905 } 3906 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3907 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3908 } else { 3909 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3910 } 3911 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3912 /* Init the timer structure */ 3913 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3914 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3915 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3916 3917 /* Now generate a route for this guy */ 3918 #ifdef INET6 3919 /* KAME hack: embed scopeid */ 3920 if (newaddr->sa_family == AF_INET6) { 3921 struct sockaddr_in6 *sin6; 3922 3923 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3924 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3925 sin6->sin6_scope_id = 0; 3926 } 3927 #endif 3928 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3929 stcb->asoc.vrf_id, 3930 stcb->sctp_ep->fibnum); 3931 3932 net->src_addr_selected = 0; 3933 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3934 /* Get source address */ 3935 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3936 stcb, 3937 (sctp_route_t *)&net->ro, 3938 net, 3939 0, 3940 stcb->asoc.vrf_id); 3941 if (stcb->asoc.default_mtu > 0) { 3942 net->mtu = stcb->asoc.default_mtu; 3943 switch (net->ro._l_addr.sa.sa_family) { 3944 #ifdef INET 3945 case AF_INET: 3946 net->mtu += SCTP_MIN_V4_OVERHEAD; 3947 break; 3948 #endif 3949 #ifdef INET6 3950 case AF_INET6: 3951 net->mtu += SCTP_MIN_OVERHEAD; 3952 break; 3953 #endif 3954 default: 3955 break; 3956 } 3957 #if defined(INET) || defined(INET6) 3958 if (net->port) { 3959 net->mtu += (uint32_t)sizeof(struct udphdr); 3960 } 3961 #endif 3962 } else if (net->ro._s_addr != NULL) { 3963 uint32_t imtu, rmtu, hcmtu; 3964 3965 net->src_addr_selected = 1; 3966 /* Now get the interface MTU */ 3967 if (net->ro._s_addr->ifn_p != NULL) { 3968 /* 3969 * XXX: Should we here just use 3970 * net->ro._s_addr->ifn_p->ifn_mtu 3971 */ 3972 imtu = SCTP_GATHER_MTU_FROM_IFN_INFO(net->ro._s_addr->ifn_p->ifn_p, 3973 net->ro._s_addr->ifn_p->ifn_index); 3974 } else { 3975 imtu = 0; 3976 } 3977 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 3978 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3979 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3980 } 3981 } 3982 if (net->mtu == 0) { 3983 if (stcb->asoc.default_mtu > 0) { 3984 net->mtu = stcb->asoc.default_mtu; 3985 switch (net->ro._l_addr.sa.sa_family) { 3986 #ifdef INET 3987 case AF_INET: 3988 net->mtu += SCTP_MIN_V4_OVERHEAD; 3989 break; 3990 #endif 3991 #ifdef INET6 3992 case AF_INET6: 3993 net->mtu += SCTP_MIN_OVERHEAD; 3994 break; 3995 #endif 3996 default: 3997 break; 3998 } 3999 #if defined(INET) || defined(INET6) 4000 if (net->port) { 4001 net->mtu += (uint32_t)sizeof(struct udphdr); 4002 } 4003 #endif 4004 } else { 4005 switch (newaddr->sa_family) { 4006 #ifdef INET 4007 case AF_INET: 4008 net->mtu = SCTP_DEFAULT_MTU; 4009 break; 4010 #endif 4011 #ifdef INET6 4012 case AF_INET6: 4013 net->mtu = 1280; 4014 break; 4015 #endif 4016 default: 4017 break; 4018 } 4019 } 4020 } 4021 #if defined(INET) || defined(INET6) 4022 if (net->port) { 4023 net->mtu -= (uint32_t)sizeof(struct udphdr); 4024 } 4025 #endif 4026 if (from == SCTP_ALLOC_ASOC) { 4027 stcb->asoc.smallest_mtu = net->mtu; 4028 } 4029 if (stcb->asoc.smallest_mtu > net->mtu) { 4030 sctp_pathmtu_adjustment(stcb, net->mtu, true); 4031 } 4032 #ifdef INET6 4033 if (newaddr->sa_family == AF_INET6) { 4034 struct sockaddr_in6 *sin6; 4035 4036 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4037 (void)sa6_recoverscope(sin6); 4038 } 4039 #endif 4040 4041 /* JRS - Use the congestion control given in the CC module */ 4042 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4043 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4044 4045 /* 4046 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4047 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4048 */ 4049 net->find_pseudo_cumack = 1; 4050 net->find_rtx_pseudo_cumack = 1; 4051 /* Choose an initial flowid. */ 4052 net->flowid = stcb->asoc.my_vtag ^ 4053 ntohs(stcb->rport) ^ 4054 ntohs(stcb->sctp_ep->sctp_lport); 4055 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4056 if (netp) { 4057 *netp = net; 4058 } 4059 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4060 if (net->ro.ro_nh == NULL) { 4061 /* Since we have no route put it at the back */ 4062 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4063 } else if (netfirst == NULL) { 4064 /* We are the first one in the pool. */ 4065 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4066 } else if (netfirst->ro.ro_nh == NULL) { 4067 /* 4068 * First one has NO route. Place this one ahead of the first 4069 * one. 4070 */ 4071 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4072 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4073 /* 4074 * This one has a different interface than the one at the 4075 * top of the list. Place it ahead. 4076 */ 4077 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4078 } else { 4079 /* 4080 * Ok we have the same interface as the first one. Move 4081 * forward until we find either a) one with a NULL route... 4082 * insert ahead of that b) one with a different ifp.. insert 4083 * after that. c) end of the list.. insert at the tail. 4084 */ 4085 struct sctp_nets *netlook; 4086 4087 do { 4088 netlook = TAILQ_NEXT(netfirst, sctp_next); 4089 if (netlook == NULL) { 4090 /* End of the list */ 4091 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4092 break; 4093 } else if (netlook->ro.ro_nh == NULL) { 4094 /* next one has NO route */ 4095 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4096 break; 4097 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4098 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4099 net, sctp_next); 4100 break; 4101 } 4102 /* Shift forward */ 4103 netfirst = netlook; 4104 } while (netlook != NULL); 4105 } 4106 4107 /* got to have a primary set */ 4108 if (stcb->asoc.primary_destination == 0) { 4109 stcb->asoc.primary_destination = net; 4110 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4111 (net->ro.ro_nh) && 4112 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4113 /* No route to current primary adopt new primary */ 4114 stcb->asoc.primary_destination = net; 4115 } 4116 /* Validate primary is first */ 4117 net = TAILQ_FIRST(&stcb->asoc.nets); 4118 if ((net != stcb->asoc.primary_destination) && 4119 (stcb->asoc.primary_destination)) { 4120 /* 4121 * first one on the list is NOT the primary sctp_cmpaddr() 4122 * is much more efficient if the primary is the first on the 4123 * list, make it so. 4124 */ 4125 TAILQ_REMOVE(&stcb->asoc.nets, 4126 stcb->asoc.primary_destination, sctp_next); 4127 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4128 stcb->asoc.primary_destination, sctp_next); 4129 } 4130 return (0); 4131 } 4132 4133 static uint32_t 4134 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4135 { 4136 uint32_t id; 4137 struct sctpasochead *head; 4138 struct sctp_tcb *lstcb; 4139 4140 try_again: 4141 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4142 /* TSNH */ 4143 return (0); 4144 } 4145 /* 4146 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4147 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4148 */ 4149 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4150 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4151 } 4152 id = inp->sctp_associd_counter; 4153 inp->sctp_associd_counter++; 4154 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4155 if (lstcb) { 4156 goto try_again; 4157 } 4158 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4159 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4160 stcb->asoc.in_asocid_hash = 1; 4161 return (id); 4162 } 4163 4164 /* 4165 * allocate an association and add it to the endpoint. The caller must be 4166 * careful to add all additional addresses once they are know right away or 4167 * else the assoc will be may experience a blackout scenario. 4168 */ 4169 static struct sctp_tcb * 4170 sctp_aloc_assoc_locked(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4171 int *error, uint32_t override_tag, uint32_t initial_tsn, 4172 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4173 struct thread *p, 4174 int initialize_auth_params) 4175 { 4176 /* note the p argument is only valid in unbound sockets */ 4177 4178 struct sctp_tcb *stcb; 4179 struct sctp_association *asoc; 4180 struct sctpasochead *head; 4181 uint16_t rport; 4182 int err; 4183 4184 SCTP_INP_INFO_WLOCK_ASSERT(); 4185 SCTP_INP_WLOCK_ASSERT(inp); 4186 4187 /* 4188 * Assumption made here: Caller has done a 4189 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4190 * address does not exist already. 4191 */ 4192 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4193 /* Hit max assoc, sorry no more */ 4194 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4195 *error = ENOBUFS; 4196 return (NULL); 4197 } 4198 if (firstaddr == NULL) { 4199 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4200 *error = EINVAL; 4201 return (NULL); 4202 } 4203 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4204 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4205 *error = EINVAL; 4206 return (NULL); 4207 } 4208 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4209 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4210 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4211 /* 4212 * If its in the TCP pool, its NOT allowed to create an 4213 * association. The parent listener needs to call 4214 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4215 * off, or connected one does this.. its an error. 4216 */ 4217 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4218 *error = EINVAL; 4219 return (NULL); 4220 } 4221 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4222 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4223 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4224 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4225 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4226 *error = EINVAL; 4227 return (NULL); 4228 } 4229 } 4230 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4231 #ifdef SCTP_DEBUG 4232 if (firstaddr) { 4233 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4234 switch (firstaddr->sa_family) { 4235 #ifdef INET 4236 case AF_INET: 4237 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4238 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4239 break; 4240 #endif 4241 #ifdef INET6 4242 case AF_INET6: 4243 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4244 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4245 break; 4246 #endif 4247 default: 4248 break; 4249 } 4250 } else { 4251 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4252 } 4253 #endif /* SCTP_DEBUG */ 4254 switch (firstaddr->sa_family) { 4255 #ifdef INET 4256 case AF_INET: 4257 { 4258 struct sockaddr_in *sin; 4259 4260 sin = (struct sockaddr_in *)firstaddr; 4261 if ((ntohs(sin->sin_port) == 0) || 4262 (sin->sin_addr.s_addr == INADDR_ANY) || 4263 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4264 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) || 4265 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 4266 (SCTP_IPV6_V6ONLY(inp) != 0))) { 4267 /* Invalid address */ 4268 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4269 *error = EINVAL; 4270 return (NULL); 4271 } 4272 rport = sin->sin_port; 4273 break; 4274 } 4275 #endif 4276 #ifdef INET6 4277 case AF_INET6: 4278 { 4279 struct sockaddr_in6 *sin6; 4280 4281 sin6 = (struct sockaddr_in6 *)firstaddr; 4282 if ((ntohs(sin6->sin6_port) == 0) || 4283 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4284 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) || 4285 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) { 4286 /* Invalid address */ 4287 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4288 *error = EINVAL; 4289 return (NULL); 4290 } 4291 rport = sin6->sin6_port; 4292 break; 4293 } 4294 #endif 4295 default: 4296 /* not supported family type */ 4297 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4298 *error = EINVAL; 4299 return (NULL); 4300 } 4301 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4302 /* 4303 * If you have not performed a bind, then we need to do the 4304 * ephemeral bind for you. 4305 */ 4306 if ((err = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) { 4307 /* bind error, probably perm */ 4308 *error = err; 4309 return (NULL); 4310 } 4311 } 4312 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4313 if (stcb == NULL) { 4314 /* out of memory? */ 4315 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4316 *error = ENOMEM; 4317 return (NULL); 4318 } 4319 SCTP_INCR_ASOC_COUNT(); 4320 4321 memset(stcb, 0, sizeof(*stcb)); 4322 asoc = &stcb->asoc; 4323 4324 SCTP_TCB_LOCK_INIT(stcb); 4325 stcb->rport = rport; 4326 /* setup back pointer's */ 4327 stcb->sctp_ep = inp; 4328 stcb->sctp_socket = inp->sctp_socket; 4329 if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) { 4330 /* failed */ 4331 SCTP_TCB_LOCK_DESTROY(stcb); 4332 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4333 SCTP_DECR_ASOC_COUNT(); 4334 *error = err; 4335 return (NULL); 4336 } 4337 SCTP_TCB_LOCK(stcb); 4338 4339 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4340 /* now that my_vtag is set, add it to the hash */ 4341 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4342 /* put it in the bucket in the vtag hash of assoc's for the system */ 4343 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4344 4345 if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) { 4346 /* failure.. memory error? */ 4347 if (asoc->strmout) { 4348 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4349 asoc->strmout = NULL; 4350 } 4351 if (asoc->mapping_array) { 4352 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4353 asoc->mapping_array = NULL; 4354 } 4355 if (asoc->nr_mapping_array) { 4356 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4357 asoc->nr_mapping_array = NULL; 4358 } 4359 SCTP_DECR_ASOC_COUNT(); 4360 SCTP_TCB_UNLOCK(stcb); 4361 SCTP_TCB_LOCK_DESTROY(stcb); 4362 LIST_REMOVE(stcb, sctp_asocs); 4363 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4364 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4365 SCTP_INP_WUNLOCK(inp); 4366 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4367 *error = ENOBUFS; 4368 return (NULL); 4369 } 4370 /* Init all the timers */ 4371 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4372 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4373 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4374 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4375 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4376 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4377 4378 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4379 /* now file the port under the hash as well */ 4380 if (inp->sctp_tcbhash != NULL) { 4381 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4382 inp->sctp_hashmark)]; 4383 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4384 } 4385 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4386 sctp_initialize_auth_params(inp, stcb); 4387 } 4388 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4389 return (stcb); 4390 } 4391 4392 struct sctp_tcb * 4393 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4394 int *error, uint32_t override_tag, uint32_t initial_tsn, 4395 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4396 struct thread *p, 4397 int initialize_auth_params) 4398 { 4399 struct sctp_tcb *stcb; 4400 4401 SCTP_INP_INFO_WLOCK(); 4402 SCTP_INP_WLOCK(inp); 4403 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4404 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4405 SCTP_INP_INFO_WUNLOCK(); 4406 SCTP_INP_WUNLOCK(inp); 4407 return (stcb); 4408 } 4409 4410 struct sctp_tcb * 4411 sctp_aloc_assoc_connected(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4412 int *error, uint32_t override_tag, uint32_t initial_tsn, 4413 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4414 struct thread *p, 4415 int initialize_auth_params) 4416 { 4417 struct sctp_tcb *stcb; 4418 4419 SCTP_INP_INFO_WLOCK(); 4420 SCTP_INP_WLOCK(inp); 4421 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 4422 SCTP_IS_LISTENING(inp)) { 4423 SCTP_INP_INFO_WUNLOCK(); 4424 SCTP_INP_WUNLOCK(inp); 4425 *error = EINVAL; 4426 return (NULL); 4427 } 4428 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4429 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4430 SCTP_INP_INFO_WUNLOCK(); 4431 if (stcb != NULL && (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4432 inp->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 4433 soisconnecting(inp->sctp_socket); 4434 } 4435 SCTP_INP_WUNLOCK(inp); 4436 return (stcb); 4437 } 4438 4439 void 4440 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4441 { 4442 struct sctp_inpcb *inp; 4443 struct sctp_association *asoc; 4444 4445 inp = stcb->sctp_ep; 4446 asoc = &stcb->asoc; 4447 asoc->numnets--; 4448 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4449 if (net == asoc->primary_destination) { 4450 /* Reset primary */ 4451 struct sctp_nets *lnet; 4452 4453 lnet = TAILQ_FIRST(&asoc->nets); 4454 /* 4455 * Mobility adaptation Ideally, if deleted destination is 4456 * the primary, it becomes a fast retransmission trigger by 4457 * the subsequent SET PRIMARY. (by micchie) 4458 */ 4459 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4460 SCTP_MOBILITY_BASE) || 4461 sctp_is_mobility_feature_on(stcb->sctp_ep, 4462 SCTP_MOBILITY_FASTHANDOFF)) { 4463 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4464 if (asoc->deleted_primary != NULL) { 4465 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4466 goto out; 4467 } 4468 asoc->deleted_primary = net; 4469 atomic_add_int(&net->ref_count, 1); 4470 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4471 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4472 sctp_mobility_feature_on(stcb->sctp_ep, 4473 SCTP_MOBILITY_PRIM_DELETED); 4474 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4475 stcb->sctp_ep, stcb, NULL); 4476 } 4477 out: 4478 /* Try to find a confirmed primary */ 4479 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4480 } 4481 if (net == asoc->last_data_chunk_from) { 4482 /* Reset primary */ 4483 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4484 } 4485 if (net == asoc->last_control_chunk_from) { 4486 /* Clear net */ 4487 asoc->last_control_chunk_from = NULL; 4488 } 4489 if (net == asoc->last_net_cmt_send_started) { 4490 /* Clear net */ 4491 asoc->last_net_cmt_send_started = NULL; 4492 } 4493 if (net == stcb->asoc.alternate) { 4494 sctp_free_remote_addr(stcb->asoc.alternate); 4495 stcb->asoc.alternate = NULL; 4496 } 4497 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4498 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4499 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4500 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4501 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4502 sctp_free_remote_addr(net); 4503 } 4504 4505 /* 4506 * remove a remote endpoint address from an association, it will fail if the 4507 * address does not exist. 4508 */ 4509 int 4510 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4511 { 4512 /* 4513 * Here we need to remove a remote address. This is quite simple, we 4514 * first find it in the list of address for the association 4515 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4516 * on that item. Note we do not allow it to be removed if there are 4517 * no other addresses. 4518 */ 4519 struct sctp_association *asoc; 4520 struct sctp_nets *net, *nnet; 4521 4522 asoc = &stcb->asoc; 4523 4524 /* locate the address */ 4525 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4526 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4527 continue; 4528 } 4529 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4530 remaddr)) { 4531 /* we found the guy */ 4532 if (asoc->numnets < 2) { 4533 /* Must have at LEAST two remote addresses */ 4534 return (-1); 4535 } else { 4536 sctp_remove_net(stcb, net); 4537 return (0); 4538 } 4539 } 4540 } 4541 /* not found. */ 4542 return (-2); 4543 } 4544 4545 static bool 4546 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport, uint32_t now) 4547 { 4548 struct sctpvtaghead *chain; 4549 struct sctp_tagblock *twait_block; 4550 int i; 4551 4552 SCTP_INP_INFO_LOCK_ASSERT(); 4553 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4554 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4555 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4556 if ((twait_block->vtag_block[i].tv_sec_at_expire >= now) && 4557 (twait_block->vtag_block[i].v_tag == tag) && 4558 (twait_block->vtag_block[i].lport == lport) && 4559 (twait_block->vtag_block[i].rport == rport)) { 4560 return (true); 4561 } 4562 } 4563 } 4564 return (false); 4565 } 4566 4567 static void 4568 sctp_set_vtag_block(struct sctp_timewait *vtag_block, uint32_t time, 4569 uint32_t tag, uint16_t lport, uint16_t rport) 4570 { 4571 vtag_block->tv_sec_at_expire = time; 4572 vtag_block->v_tag = tag; 4573 vtag_block->lport = lport; 4574 vtag_block->rport = rport; 4575 } 4576 4577 static void 4578 sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4579 { 4580 struct sctpvtaghead *chain; 4581 struct sctp_tagblock *twait_block; 4582 struct timeval now; 4583 uint32_t time; 4584 int i; 4585 bool set; 4586 4587 SCTP_INP_INFO_WLOCK_ASSERT(); 4588 (void)SCTP_GETTIME_TIMEVAL(&now); 4589 time = (uint32_t)now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait); 4590 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4591 set = false; 4592 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4593 /* Block(s) present, lets find space, and expire on the fly */ 4594 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4595 if ((twait_block->vtag_block[i].v_tag == 0) && !set) { 4596 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4597 set = true; 4598 continue; 4599 } 4600 if ((twait_block->vtag_block[i].v_tag != 0) && 4601 (twait_block->vtag_block[i].tv_sec_at_expire < (uint32_t)now.tv_sec)) { 4602 if (set) { 4603 /* Audit expires this guy */ 4604 sctp_set_vtag_block(twait_block->vtag_block + i, 0, 0, 0, 0); 4605 } else { 4606 /* Reuse it for the new tag */ 4607 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4608 set = true; 4609 } 4610 } 4611 } 4612 if (set) { 4613 /* 4614 * We only do up to the block where we can place our 4615 * tag for audits 4616 */ 4617 break; 4618 } 4619 } 4620 /* Need to add a new block to chain */ 4621 if (!set) { 4622 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4623 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4624 if (twait_block == NULL) { 4625 return; 4626 } 4627 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4628 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4629 sctp_set_vtag_block(twait_block->vtag_block, time, tag, lport, rport); 4630 } 4631 } 4632 4633 void 4634 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4635 { 4636 struct sctp_tmit_chunk *chk, *nchk; 4637 struct sctp_queued_to_read *control, *ncontrol; 4638 4639 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4640 TAILQ_REMOVE(rh, control, next_instrm); 4641 control->on_strm_q = 0; 4642 if (control->on_read_q == 0) { 4643 sctp_free_remote_addr(control->whoFrom); 4644 if (control->data) { 4645 sctp_m_freem(control->data); 4646 control->data = NULL; 4647 } 4648 } 4649 /* Reassembly free? */ 4650 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4651 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4652 if (chk->data) { 4653 sctp_m_freem(chk->data); 4654 chk->data = NULL; 4655 } 4656 if (chk->holds_key_ref) 4657 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4658 sctp_free_remote_addr(chk->whoTo); 4659 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4660 SCTP_DECR_CHK_COUNT(); 4661 /* sa_ignore FREED_MEMORY */ 4662 } 4663 /* 4664 * We don't free the address here since all the net's were 4665 * freed above. 4666 */ 4667 if (control->on_read_q == 0) { 4668 sctp_free_a_readq(stcb, control); 4669 } 4670 } 4671 } 4672 4673 /*- 4674 * Free the association after un-hashing the remote port. This 4675 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4676 * expect that the input to this function IS a locked TCB. 4677 * It will return 0, if it did NOT destroy the association (instead 4678 * it unlocks it. It will return NON-zero if it either destroyed the 4679 * association OR the association is already destroyed. 4680 */ 4681 int 4682 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4683 { 4684 int i; 4685 struct sctp_association *asoc; 4686 struct sctp_nets *net, *nnet; 4687 struct sctp_laddr *laddr, *naddr; 4688 struct sctp_tmit_chunk *chk, *nchk; 4689 struct sctp_asconf_addr *aparam, *naparam; 4690 struct sctp_asconf_ack *aack, *naack; 4691 struct sctp_stream_reset_list *strrst, *nstrrst; 4692 struct sctp_queued_to_read *sq, *nsq; 4693 struct sctp_stream_queue_pending *sp, *nsp; 4694 sctp_sharedkey_t *shared_key, *nshared_key; 4695 struct socket *so; 4696 4697 /* first, lets purge the entry from the hash table. */ 4698 SCTP_TCB_LOCK_ASSERT(stcb); 4699 4700 #ifdef SCTP_LOG_CLOSING 4701 sctp_log_closing(inp, stcb, 6); 4702 #endif 4703 if (stcb->asoc.state == 0) { 4704 #ifdef SCTP_LOG_CLOSING 4705 sctp_log_closing(inp, NULL, 7); 4706 #endif 4707 /* there is no asoc, really TSNH :-0 */ 4708 return (1); 4709 } 4710 if (stcb->asoc.alternate) { 4711 sctp_free_remote_addr(stcb->asoc.alternate); 4712 stcb->asoc.alternate = NULL; 4713 } 4714 /* TEMP CODE */ 4715 if (stcb->freed_from_where == 0) { 4716 /* Only record the first place free happened from */ 4717 stcb->freed_from_where = from_location; 4718 } 4719 /* TEMP CODE */ 4720 4721 asoc = &stcb->asoc; 4722 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4723 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4724 /* nothing around */ 4725 so = NULL; 4726 else 4727 so = inp->sctp_socket; 4728 4729 /* 4730 * We used timer based freeing if a reader or writer is in the way. 4731 * So we first check if we are actually being called from a timer, 4732 * if so we abort early if a reader or writer is still in the way. 4733 */ 4734 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4735 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4736 /* 4737 * is it the timer driving us? if so are the reader/writers 4738 * gone? 4739 */ 4740 if (stcb->asoc.refcnt) { 4741 /* nope, reader or writer in the way */ 4742 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4743 /* no asoc destroyed */ 4744 SCTP_TCB_UNLOCK(stcb); 4745 #ifdef SCTP_LOG_CLOSING 4746 sctp_log_closing(inp, stcb, 8); 4747 #endif 4748 return (0); 4749 } 4750 } 4751 /* Now clean up any other timers */ 4752 sctp_stop_association_timers(stcb, false); 4753 /* Now the read queue needs to be cleaned up (only once) */ 4754 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4755 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4756 SCTP_INP_READ_LOCK(inp); 4757 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4758 if (sq->stcb == stcb) { 4759 sq->do_not_ref_stcb = 1; 4760 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4761 /* 4762 * If there is no end, there never will be 4763 * now. 4764 */ 4765 if (sq->end_added == 0) { 4766 /* Held for PD-API clear that. */ 4767 sq->pdapi_aborted = 1; 4768 sq->held_length = 0; 4769 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4770 /* 4771 * Need to add a PD-API 4772 * aborted indication. 4773 * Setting the control_pdapi 4774 * assures that it will be 4775 * added right after this 4776 * msg. 4777 */ 4778 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4779 stcb, 4780 SCTP_PARTIAL_DELIVERY_ABORTED, 4781 (void *)sq, 4782 SCTP_SO_LOCKED); 4783 } 4784 /* Add an end to wake them */ 4785 sq->end_added = 1; 4786 } 4787 } 4788 } 4789 SCTP_INP_READ_UNLOCK(inp); 4790 if (stcb->block_entry) { 4791 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4792 stcb->block_entry->error = ECONNRESET; 4793 stcb->block_entry = NULL; 4794 } 4795 } 4796 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4797 /* 4798 * Someone holds a reference OR the socket is unaccepted 4799 * yet. 4800 */ 4801 if ((stcb->asoc.refcnt) || 4802 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4803 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4804 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4805 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4806 } 4807 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4808 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4809 /* nothing around */ 4810 so = NULL; 4811 if (so) { 4812 /* Wake any reader/writers */ 4813 sctp_sorwakeup(inp, so); 4814 sctp_sowwakeup(inp, so); 4815 } 4816 SCTP_TCB_UNLOCK(stcb); 4817 4818 #ifdef SCTP_LOG_CLOSING 4819 sctp_log_closing(inp, stcb, 9); 4820 #endif 4821 /* no asoc destroyed */ 4822 return (0); 4823 } 4824 #ifdef SCTP_LOG_CLOSING 4825 sctp_log_closing(inp, stcb, 10); 4826 #endif 4827 /* 4828 * When I reach here, no others want to kill the assoc yet.. and I 4829 * own the lock. Now its possible an abort comes in when I do the 4830 * lock exchange below to grab all the locks to do the final take 4831 * out. to prevent this we increment the count, which will start a 4832 * timer and blow out above thus assuring us that we hold exclusive 4833 * killing of the asoc. Note that after getting back the TCB lock we 4834 * will go ahead and increment the counter back up and stop any 4835 * timer a passing stranger may have started :-S 4836 */ 4837 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4838 atomic_add_int(&stcb->asoc.refcnt, 1); 4839 4840 SCTP_TCB_UNLOCK(stcb); 4841 SCTP_INP_INFO_WLOCK(); 4842 SCTP_INP_WLOCK(inp); 4843 SCTP_TCB_LOCK(stcb); 4844 } 4845 /* Double check the GONE flag */ 4846 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4847 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4848 /* nothing around */ 4849 so = NULL; 4850 4851 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4852 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4853 /* 4854 * For TCP type we need special handling when we are 4855 * connected. We also include the peel'ed off ones to. 4856 */ 4857 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4858 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4859 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4860 if (so) { 4861 SOCKBUF_LOCK(&so->so_rcv); 4862 so->so_state &= ~(SS_ISCONNECTING | 4863 SS_ISDISCONNECTING | 4864 SS_ISCONFIRMING | 4865 SS_ISCONNECTED); 4866 so->so_state |= SS_ISDISCONNECTED; 4867 socantrcvmore_locked(so); 4868 socantsendmore(so); 4869 sctp_sowwakeup(inp, so); 4870 sctp_sorwakeup(inp, so); 4871 SCTP_SOWAKEUP(so); 4872 } 4873 } 4874 } 4875 4876 /* 4877 * Make it invalid too, that way if its about to run it will abort 4878 * and return. 4879 */ 4880 /* re-increment the lock */ 4881 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4882 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4883 } 4884 if (stcb->asoc.refcnt) { 4885 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4886 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4887 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4888 SCTP_INP_INFO_WUNLOCK(); 4889 SCTP_INP_WUNLOCK(inp); 4890 } 4891 SCTP_TCB_UNLOCK(stcb); 4892 return (0); 4893 } 4894 asoc->state = 0; 4895 if (inp->sctp_tcbhash) { 4896 LIST_REMOVE(stcb, sctp_tcbhash); 4897 } 4898 if (stcb->asoc.in_asocid_hash) { 4899 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4900 } 4901 if (inp->sctp_socket == NULL) { 4902 stcb->sctp_socket = NULL; 4903 } 4904 /* Now lets remove it from the list of ALL associations in the EP */ 4905 LIST_REMOVE(stcb, sctp_tcblist); 4906 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4907 SCTP_INP_INCR_REF(inp); 4908 SCTP_INP_WUNLOCK(inp); 4909 } 4910 /* pull from vtag hash */ 4911 LIST_REMOVE(stcb, sctp_asocs); 4912 sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport); 4913 4914 /* 4915 * Now restop the timers to be sure this is paranoia at is finest! 4916 */ 4917 sctp_stop_association_timers(stcb, true); 4918 4919 /* 4920 * The chunk lists and such SHOULD be empty but we check them just 4921 * in case. 4922 */ 4923 /* anything on the wheel needs to be removed */ 4924 for (i = 0; i < asoc->streamoutcnt; i++) { 4925 struct sctp_stream_out *outs; 4926 4927 outs = &asoc->strmout[i]; 4928 /* now clean up any chunks here */ 4929 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4930 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4931 TAILQ_REMOVE(&outs->outqueue, sp, next); 4932 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp); 4933 sctp_free_spbufspace(stcb, asoc, sp); 4934 if (sp->data) { 4935 if (so) { 4936 /* Still an open socket - report */ 4937 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4938 0, (void *)sp, SCTP_SO_LOCKED); 4939 } 4940 if (sp->data) { 4941 sctp_m_freem(sp->data); 4942 sp->data = NULL; 4943 sp->tail_mbuf = NULL; 4944 sp->length = 0; 4945 } 4946 } 4947 if (sp->net) { 4948 sctp_free_remote_addr(sp->net); 4949 sp->net = NULL; 4950 } 4951 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4952 } 4953 } 4954 /* sa_ignore FREED_MEMORY */ 4955 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4956 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4957 SCTP_FREE(strrst, SCTP_M_STRESET); 4958 } 4959 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4960 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4961 if (sq->data) { 4962 sctp_m_freem(sq->data); 4963 sq->data = NULL; 4964 } 4965 sctp_free_remote_addr(sq->whoFrom); 4966 sq->whoFrom = NULL; 4967 sq->stcb = NULL; 4968 /* Free the ctl entry */ 4969 sctp_free_a_readq(stcb, sq); 4970 /* sa_ignore FREED_MEMORY */ 4971 } 4972 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4973 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4974 if (chk->data) { 4975 sctp_m_freem(chk->data); 4976 chk->data = NULL; 4977 } 4978 if (chk->holds_key_ref) 4979 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4980 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4981 SCTP_DECR_CHK_COUNT(); 4982 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4983 asoc->free_chunk_cnt--; 4984 /* sa_ignore FREED_MEMORY */ 4985 } 4986 /* pending send queue SHOULD be empty */ 4987 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4988 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 4989 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 4990 #ifdef INVARIANTS 4991 } else { 4992 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 4993 #endif 4994 } 4995 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4996 if (chk->data) { 4997 if (so) { 4998 /* Still a socket? */ 4999 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5000 0, chk, SCTP_SO_LOCKED); 5001 } 5002 if (chk->data) { 5003 sctp_m_freem(chk->data); 5004 chk->data = NULL; 5005 } 5006 } 5007 if (chk->holds_key_ref) 5008 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5009 if (chk->whoTo) { 5010 sctp_free_remote_addr(chk->whoTo); 5011 chk->whoTo = NULL; 5012 } 5013 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5014 SCTP_DECR_CHK_COUNT(); 5015 /* sa_ignore FREED_MEMORY */ 5016 } 5017 /* sent queue SHOULD be empty */ 5018 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5019 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5020 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5021 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5022 #ifdef INVARIANTS 5023 } else { 5024 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5025 #endif 5026 } 5027 } 5028 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5029 if (chk->data) { 5030 if (so) { 5031 /* Still a socket? */ 5032 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5033 0, chk, SCTP_SO_LOCKED); 5034 } 5035 if (chk->data) { 5036 sctp_m_freem(chk->data); 5037 chk->data = NULL; 5038 } 5039 } 5040 if (chk->holds_key_ref) 5041 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5042 sctp_free_remote_addr(chk->whoTo); 5043 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5044 SCTP_DECR_CHK_COUNT(); 5045 /* sa_ignore FREED_MEMORY */ 5046 } 5047 #ifdef INVARIANTS 5048 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5049 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5050 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5051 } 5052 } 5053 #endif 5054 /* control queue MAY not be empty */ 5055 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5056 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5057 if (chk->data) { 5058 sctp_m_freem(chk->data); 5059 chk->data = NULL; 5060 } 5061 if (chk->holds_key_ref) 5062 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5063 sctp_free_remote_addr(chk->whoTo); 5064 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5065 SCTP_DECR_CHK_COUNT(); 5066 /* sa_ignore FREED_MEMORY */ 5067 } 5068 /* ASCONF queue MAY not be empty */ 5069 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5070 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5071 if (chk->data) { 5072 sctp_m_freem(chk->data); 5073 chk->data = NULL; 5074 } 5075 if (chk->holds_key_ref) 5076 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5077 sctp_free_remote_addr(chk->whoTo); 5078 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5079 SCTP_DECR_CHK_COUNT(); 5080 /* sa_ignore FREED_MEMORY */ 5081 } 5082 if (asoc->mapping_array) { 5083 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5084 asoc->mapping_array = NULL; 5085 } 5086 if (asoc->nr_mapping_array) { 5087 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5088 asoc->nr_mapping_array = NULL; 5089 } 5090 /* the stream outs */ 5091 if (asoc->strmout) { 5092 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5093 asoc->strmout = NULL; 5094 } 5095 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5096 if (asoc->strmin) { 5097 for (i = 0; i < asoc->streamincnt; i++) { 5098 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5099 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5100 } 5101 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5102 asoc->strmin = NULL; 5103 } 5104 asoc->streamincnt = 0; 5105 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5106 #ifdef INVARIANTS 5107 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5108 panic("no net's left alloc'ed, or list points to itself"); 5109 } 5110 #endif 5111 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5112 sctp_free_remote_addr(net); 5113 } 5114 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5115 /* sa_ignore FREED_MEMORY */ 5116 sctp_remove_laddr(laddr); 5117 } 5118 5119 /* pending asconf (address) parameters */ 5120 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5121 /* sa_ignore FREED_MEMORY */ 5122 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5123 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5124 } 5125 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5126 /* sa_ignore FREED_MEMORY */ 5127 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5128 if (aack->data != NULL) { 5129 sctp_m_freem(aack->data); 5130 } 5131 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5132 } 5133 /* clean up auth stuff */ 5134 if (asoc->local_hmacs) 5135 sctp_free_hmaclist(asoc->local_hmacs); 5136 if (asoc->peer_hmacs) 5137 sctp_free_hmaclist(asoc->peer_hmacs); 5138 5139 if (asoc->local_auth_chunks) 5140 sctp_free_chunklist(asoc->local_auth_chunks); 5141 if (asoc->peer_auth_chunks) 5142 sctp_free_chunklist(asoc->peer_auth_chunks); 5143 5144 sctp_free_authinfo(&asoc->authinfo); 5145 5146 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5147 LIST_REMOVE(shared_key, next); 5148 sctp_free_sharedkey(shared_key); 5149 /* sa_ignore FREED_MEMORY */ 5150 } 5151 5152 /* Insert new items here :> */ 5153 5154 /* Get rid of LOCK */ 5155 SCTP_TCB_UNLOCK(stcb); 5156 SCTP_TCB_LOCK_DESTROY(stcb); 5157 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5158 SCTP_INP_INFO_WUNLOCK(); 5159 SCTP_INP_RLOCK(inp); 5160 } 5161 #ifdef SCTP_TRACK_FREED_ASOCS 5162 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5163 /* now clean up the tasoc itself */ 5164 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5165 SCTP_DECR_ASOC_COUNT(); 5166 } else { 5167 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5168 } 5169 #else 5170 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5171 SCTP_DECR_ASOC_COUNT(); 5172 #endif 5173 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5174 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5175 /* 5176 * If its NOT the inp_free calling us AND sctp_close 5177 * as been called, we call back... 5178 */ 5179 SCTP_INP_RUNLOCK(inp); 5180 /* 5181 * This will start the kill timer (if we are the 5182 * last one) since we hold an increment yet. But 5183 * this is the only safe way to do this since 5184 * otherwise if the socket closes at the same time 5185 * we are here we might collide in the cleanup. 5186 */ 5187 sctp_inpcb_free(inp, 5188 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5189 SCTP_CALLED_DIRECTLY_NOCMPSET); 5190 SCTP_INP_DECR_REF(inp); 5191 } else { 5192 /* The socket is still open. */ 5193 SCTP_INP_DECR_REF(inp); 5194 SCTP_INP_RUNLOCK(inp); 5195 } 5196 } 5197 /* destroyed the asoc */ 5198 #ifdef SCTP_LOG_CLOSING 5199 sctp_log_closing(inp, NULL, 11); 5200 #endif 5201 return (1); 5202 } 5203 5204 /* 5205 * determine if a destination is "reachable" based upon the addresses bound 5206 * to the current endpoint (e.g. only v4 or v6 currently bound) 5207 */ 5208 /* 5209 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5210 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5211 * types bound as its endpoint 5212 */ 5213 int 5214 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5215 { 5216 struct sctp_inpcb *inp; 5217 int answer; 5218 5219 /* 5220 * No locks here, the TCB, in all cases is already locked and an 5221 * assoc is up. There is either a INP lock by the caller applied (in 5222 * asconf case when deleting an address) or NOT in the HB case, 5223 * however if HB then the INP increment is up and the INP will not 5224 * be removed (on top of the fact that we have a TCB lock). So we 5225 * only want to read the sctp_flags, which is either bound-all or 5226 * not.. no protection needed since once an assoc is up you can't be 5227 * changing your binding. 5228 */ 5229 inp = stcb->sctp_ep; 5230 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5231 /* if bound all, destination is not restricted */ 5232 /* 5233 * RRS: Question during lock work: Is this correct? If you 5234 * are bound-all you still might need to obey the V4--V6 5235 * flags??? IMO this bound-all stuff needs to be removed! 5236 */ 5237 return (1); 5238 } 5239 /* NOTE: all "scope" checks are done when local addresses are added */ 5240 switch (destaddr->sa_family) { 5241 #ifdef INET6 5242 case AF_INET6: 5243 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5244 break; 5245 #endif 5246 #ifdef INET 5247 case AF_INET: 5248 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5249 break; 5250 #endif 5251 default: 5252 /* invalid family, so it's unreachable */ 5253 answer = 0; 5254 break; 5255 } 5256 return (answer); 5257 } 5258 5259 /* 5260 * update the inp_vflags on an endpoint 5261 */ 5262 static void 5263 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5264 { 5265 struct sctp_laddr *laddr; 5266 5267 /* first clear the flag */ 5268 inp->ip_inp.inp.inp_vflag = 0; 5269 /* set the flag based on addresses on the ep list */ 5270 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5271 if (laddr->ifa == NULL) { 5272 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5273 __func__); 5274 continue; 5275 } 5276 5277 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5278 continue; 5279 } 5280 switch (laddr->ifa->address.sa.sa_family) { 5281 #ifdef INET6 5282 case AF_INET6: 5283 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5284 break; 5285 #endif 5286 #ifdef INET 5287 case AF_INET: 5288 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5289 break; 5290 #endif 5291 default: 5292 break; 5293 } 5294 } 5295 } 5296 5297 /* 5298 * Add the address to the endpoint local address list There is nothing to be 5299 * done if we are bound to all addresses 5300 */ 5301 void 5302 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5303 { 5304 struct sctp_laddr *laddr; 5305 struct sctp_tcb *stcb; 5306 int fnd, error = 0; 5307 5308 fnd = 0; 5309 5310 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5311 /* You are already bound to all. You have it already */ 5312 return; 5313 } 5314 #ifdef INET6 5315 if (ifa->address.sa.sa_family == AF_INET6) { 5316 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5317 /* Can't bind a non-useable addr. */ 5318 return; 5319 } 5320 } 5321 #endif 5322 /* first, is it already present? */ 5323 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5324 if (laddr->ifa == ifa) { 5325 fnd = 1; 5326 break; 5327 } 5328 } 5329 5330 if (fnd == 0) { 5331 /* Not in the ep list */ 5332 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5333 if (error != 0) 5334 return; 5335 inp->laddr_count++; 5336 /* update inp_vflag flags */ 5337 switch (ifa->address.sa.sa_family) { 5338 #ifdef INET6 5339 case AF_INET6: 5340 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5341 break; 5342 #endif 5343 #ifdef INET 5344 case AF_INET: 5345 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5346 break; 5347 #endif 5348 default: 5349 break; 5350 } 5351 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5352 sctp_add_local_addr_restricted(stcb, ifa); 5353 } 5354 } 5355 return; 5356 } 5357 5358 /* 5359 * select a new (hopefully reachable) destination net (should only be used 5360 * when we deleted an ep addr that is the only usable source address to reach 5361 * the destination net) 5362 */ 5363 static void 5364 sctp_select_primary_destination(struct sctp_tcb *stcb) 5365 { 5366 struct sctp_nets *net; 5367 5368 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5369 /* for now, we'll just pick the first reachable one we find */ 5370 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5371 continue; 5372 if (sctp_destination_is_reachable(stcb, 5373 (struct sockaddr *)&net->ro._l_addr)) { 5374 /* found a reachable destination */ 5375 stcb->asoc.primary_destination = net; 5376 } 5377 } 5378 /* I can't there from here! ...we're gonna die shortly... */ 5379 } 5380 5381 /* 5382 * Delete the address from the endpoint local address list. There is nothing 5383 * to be done if we are bound to all addresses 5384 */ 5385 void 5386 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5387 { 5388 struct sctp_laddr *laddr; 5389 int fnd; 5390 5391 fnd = 0; 5392 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5393 /* You are already bound to all. You have it already */ 5394 return; 5395 } 5396 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5397 if (laddr->ifa == ifa) { 5398 fnd = 1; 5399 break; 5400 } 5401 } 5402 if (fnd && (inp->laddr_count < 2)) { 5403 /* can't delete unless there are at LEAST 2 addresses */ 5404 return; 5405 } 5406 if (fnd) { 5407 /* 5408 * clean up any use of this address go through our 5409 * associations and clear any last_used_address that match 5410 * this one for each assoc, see if a new primary_destination 5411 * is needed 5412 */ 5413 struct sctp_tcb *stcb; 5414 5415 /* clean up "next_addr_touse" */ 5416 if (inp->next_addr_touse == laddr) 5417 /* delete this address */ 5418 inp->next_addr_touse = NULL; 5419 5420 /* clean up "last_used_address" */ 5421 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5422 struct sctp_nets *net; 5423 5424 SCTP_TCB_LOCK(stcb); 5425 if (stcb->asoc.last_used_address == laddr) 5426 /* delete this address */ 5427 stcb->asoc.last_used_address = NULL; 5428 /* 5429 * Now spin through all the nets and purge any ref 5430 * to laddr 5431 */ 5432 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5433 if (net->ro._s_addr == laddr->ifa) { 5434 /* Yep, purge src address selected */ 5435 RO_NHFREE(&net->ro); 5436 sctp_free_ifa(net->ro._s_addr); 5437 net->ro._s_addr = NULL; 5438 net->src_addr_selected = 0; 5439 } 5440 } 5441 SCTP_TCB_UNLOCK(stcb); 5442 } /* for each tcb */ 5443 /* remove it from the ep list */ 5444 sctp_remove_laddr(laddr); 5445 inp->laddr_count--; 5446 /* update inp_vflag flags */ 5447 sctp_update_ep_vflag(inp); 5448 } 5449 return; 5450 } 5451 5452 /* 5453 * Add the address to the TCB local address restricted list. 5454 * This is a "pending" address list (eg. addresses waiting for an 5455 * ASCONF-ACK response) and cannot be used as a valid source address. 5456 */ 5457 void 5458 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5459 { 5460 struct sctp_laddr *laddr; 5461 struct sctpladdr *list; 5462 5463 /* 5464 * Assumes TCB is locked.. and possibly the INP. May need to 5465 * confirm/fix that if we need it and is not the case. 5466 */ 5467 list = &stcb->asoc.sctp_restricted_addrs; 5468 5469 #ifdef INET6 5470 if (ifa->address.sa.sa_family == AF_INET6) { 5471 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5472 /* Can't bind a non-existent addr. */ 5473 return; 5474 } 5475 } 5476 #endif 5477 /* does the address already exist? */ 5478 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5479 if (laddr->ifa == ifa) { 5480 return; 5481 } 5482 } 5483 5484 /* add to the list */ 5485 (void)sctp_insert_laddr(list, ifa, 0); 5486 return; 5487 } 5488 5489 /* 5490 * Remove a local address from the TCB local address restricted list 5491 */ 5492 void 5493 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5494 { 5495 struct sctp_inpcb *inp; 5496 struct sctp_laddr *laddr; 5497 5498 /* 5499 * This is called by asconf work. It is assumed that a) The TCB is 5500 * locked and b) The INP is locked. This is true in as much as I can 5501 * trace through the entry asconf code where I did these locks. 5502 * Again, the ASCONF code is a bit different in that it does lock 5503 * the INP during its work often times. This must be since we don't 5504 * want other proc's looking up things while what they are looking 5505 * up is changing :-D 5506 */ 5507 5508 inp = stcb->sctp_ep; 5509 /* if subset bound and don't allow ASCONF's, can't delete last */ 5510 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5511 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5512 if (stcb->sctp_ep->laddr_count < 2) { 5513 /* can't delete last address */ 5514 return; 5515 } 5516 } 5517 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5518 /* remove the address if it exists */ 5519 if (laddr->ifa == NULL) 5520 continue; 5521 if (laddr->ifa == ifa) { 5522 sctp_remove_laddr(laddr); 5523 return; 5524 } 5525 } 5526 5527 /* address not found! */ 5528 return; 5529 } 5530 5531 /* sysctl */ 5532 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5533 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5534 5535 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5536 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5537 int *sctp_cpuarry = NULL; 5538 5539 void 5540 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5541 { 5542 /* Queue a packet to a processor for the specified core */ 5543 struct sctp_mcore_queue *qent; 5544 struct sctp_mcore_ctrl *wkq; 5545 int need_wake = 0; 5546 5547 if (sctp_mcore_workers == NULL) { 5548 /* Something went way bad during setup */ 5549 sctp_input_with_port(m, off, 0); 5550 return; 5551 } 5552 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5553 (sizeof(struct sctp_mcore_queue)), 5554 SCTP_M_MCORE); 5555 if (qent == NULL) { 5556 /* This is trouble */ 5557 sctp_input_with_port(m, off, 0); 5558 return; 5559 } 5560 qent->vn = curvnet; 5561 qent->m = m; 5562 qent->off = off; 5563 qent->v6 = 0; 5564 wkq = &sctp_mcore_workers[cpu_to_use]; 5565 SCTP_MCORE_QLOCK(wkq); 5566 5567 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5568 if (wkq->running == 0) { 5569 need_wake = 1; 5570 } 5571 SCTP_MCORE_QUNLOCK(wkq); 5572 if (need_wake) { 5573 wakeup(&wkq->running); 5574 } 5575 } 5576 5577 static void 5578 sctp_mcore_thread(void *arg) 5579 { 5580 5581 struct sctp_mcore_ctrl *wkq; 5582 struct sctp_mcore_queue *qent; 5583 5584 wkq = (struct sctp_mcore_ctrl *)arg; 5585 struct mbuf *m; 5586 int off, v6; 5587 5588 /* Wait for first tickle */ 5589 SCTP_MCORE_LOCK(wkq); 5590 wkq->running = 0; 5591 msleep(&wkq->running, 5592 &wkq->core_mtx, 5593 0, "wait for pkt", 0); 5594 SCTP_MCORE_UNLOCK(wkq); 5595 5596 /* Bind to our cpu */ 5597 thread_lock(curthread); 5598 sched_bind(curthread, wkq->cpuid); 5599 thread_unlock(curthread); 5600 5601 /* Now lets start working */ 5602 SCTP_MCORE_LOCK(wkq); 5603 /* Now grab lock and go */ 5604 for (;;) { 5605 SCTP_MCORE_QLOCK(wkq); 5606 skip_sleep: 5607 wkq->running = 1; 5608 qent = TAILQ_FIRST(&wkq->que); 5609 if (qent) { 5610 TAILQ_REMOVE(&wkq->que, qent, next); 5611 SCTP_MCORE_QUNLOCK(wkq); 5612 CURVNET_SET(qent->vn); 5613 m = qent->m; 5614 off = qent->off; 5615 v6 = qent->v6; 5616 SCTP_FREE(qent, SCTP_M_MCORE); 5617 if (v6 == 0) { 5618 sctp_input_with_port(m, off, 0); 5619 } else { 5620 SCTP_PRINTF("V6 not yet supported\n"); 5621 sctp_m_freem(m); 5622 } 5623 CURVNET_RESTORE(); 5624 SCTP_MCORE_QLOCK(wkq); 5625 } 5626 wkq->running = 0; 5627 if (!TAILQ_EMPTY(&wkq->que)) { 5628 goto skip_sleep; 5629 } 5630 SCTP_MCORE_QUNLOCK(wkq); 5631 msleep(&wkq->running, 5632 &wkq->core_mtx, 5633 0, "wait for pkt", 0); 5634 } 5635 } 5636 5637 static void 5638 sctp_startup_mcore_threads(void) 5639 { 5640 int i, cpu; 5641 5642 if (mp_ncpus == 1) 5643 return; 5644 5645 if (sctp_mcore_workers != NULL) { 5646 /* 5647 * Already been here in some previous vnet? 5648 */ 5649 return; 5650 } 5651 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5652 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5653 SCTP_M_MCORE); 5654 if (sctp_mcore_workers == NULL) { 5655 /* TSNH I hope */ 5656 return; 5657 } 5658 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5659 sizeof(struct sctp_mcore_ctrl))); 5660 /* Init the structures */ 5661 for (i = 0; i <= mp_maxid; i++) { 5662 TAILQ_INIT(&sctp_mcore_workers[i].que); 5663 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5664 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5665 sctp_mcore_workers[i].cpuid = i; 5666 } 5667 if (sctp_cpuarry == NULL) { 5668 SCTP_MALLOC(sctp_cpuarry, int *, 5669 (mp_ncpus * sizeof(int)), 5670 SCTP_M_MCORE); 5671 i = 0; 5672 CPU_FOREACH(cpu) { 5673 sctp_cpuarry[i] = cpu; 5674 i++; 5675 } 5676 } 5677 /* Now start them all */ 5678 CPU_FOREACH(cpu) { 5679 (void)kproc_create(sctp_mcore_thread, 5680 (void *)&sctp_mcore_workers[cpu], 5681 &sctp_mcore_workers[cpu].thread_proc, 5682 0, 5683 SCTP_KTHREAD_PAGES, 5684 SCTP_MCORE_NAME); 5685 } 5686 } 5687 #endif 5688 5689 void 5690 sctp_pcb_init(void) 5691 { 5692 /* 5693 * SCTP initialization for the PCB structures should be called by 5694 * the sctp_init() function. 5695 */ 5696 int i; 5697 struct timeval tv; 5698 5699 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5700 /* error I was called twice */ 5701 return; 5702 } 5703 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5704 5705 #if defined(SCTP_LOCAL_TRACE_BUF) 5706 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5707 #endif 5708 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5709 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5710 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5711 SCTP_M_MCORE); 5712 #endif 5713 (void)SCTP_GETTIME_TIMEVAL(&tv); 5714 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5715 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5716 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5717 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5718 #else 5719 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5720 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5721 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5722 #endif 5723 /* init the empty list of (All) Endpoints */ 5724 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5725 5726 /* init the hash table of endpoints */ 5727 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5728 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5729 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5730 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5731 &SCTP_BASE_INFO(hashasocmark)); 5732 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5733 &SCTP_BASE_INFO(hashmark)); 5734 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5735 &SCTP_BASE_INFO(hashtcpmark)); 5736 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5737 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5738 &SCTP_BASE_INFO(hashvrfmark)); 5739 5740 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5741 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5742 /* init the zones */ 5743 /* 5744 * FIX ME: Should check for NULL returns, but if it does fail we are 5745 * doomed to panic anyways... add later maybe. 5746 */ 5747 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5748 sizeof(struct sctp_inpcb), maxsockets); 5749 5750 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5751 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5752 5753 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5754 sizeof(struct sctp_laddr), 5755 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5756 5757 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5758 sizeof(struct sctp_nets), 5759 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5760 5761 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5762 sizeof(struct sctp_tmit_chunk), 5763 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5764 5765 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5766 sizeof(struct sctp_queued_to_read), 5767 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5768 5769 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5770 sizeof(struct sctp_stream_queue_pending), 5771 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5772 5773 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5774 sizeof(struct sctp_asconf), 5775 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5776 5777 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5778 sizeof(struct sctp_asconf_ack), 5779 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5780 5781 /* Master Lock INIT for info structure */ 5782 SCTP_INP_INFO_LOCK_INIT(); 5783 SCTP_STATLOG_INIT_LOCK(); 5784 5785 SCTP_IPI_COUNT_INIT(); 5786 SCTP_IPI_ADDR_INIT(); 5787 #ifdef SCTP_PACKET_LOGGING 5788 SCTP_IP_PKTLOG_INIT(); 5789 #endif 5790 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5791 5792 SCTP_WQ_ADDR_INIT(); 5793 /* not sure if we need all the counts */ 5794 SCTP_BASE_INFO(ipi_count_ep) = 0; 5795 /* assoc/tcb zone info */ 5796 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5797 /* local addrlist zone info */ 5798 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5799 /* remote addrlist zone info */ 5800 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5801 /* chunk info */ 5802 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5803 5804 /* socket queue zone info */ 5805 SCTP_BASE_INFO(ipi_count_readq) = 0; 5806 5807 /* stream out queue cont */ 5808 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5809 5810 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5811 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5812 5813 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5814 5815 /* Init the TIMEWAIT list */ 5816 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5817 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5818 } 5819 sctp_startup_iterator(); 5820 5821 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5822 sctp_startup_mcore_threads(); 5823 #endif 5824 5825 /* 5826 * INIT the default VRF which for BSD is the only one, other O/S's 5827 * may have more. But initially they must start with one and then 5828 * add the VRF's as addresses are added. 5829 */ 5830 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5831 } 5832 5833 /* 5834 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5835 */ 5836 void 5837 sctp_pcb_finish(void) 5838 { 5839 struct sctp_vrflist *vrf_bucket; 5840 struct sctp_vrf *vrf, *nvrf; 5841 struct sctp_ifn *ifn, *nifn; 5842 struct sctp_ifa *ifa, *nifa; 5843 struct sctpvtaghead *chain; 5844 struct sctp_tagblock *twait_block, *prev_twait_block; 5845 struct sctp_laddr *wi, *nwi; 5846 int i; 5847 struct sctp_iterator *it, *nit; 5848 5849 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5850 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5851 return; 5852 } 5853 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5854 /* 5855 * In FreeBSD the iterator thread never exits but we do clean up. 5856 * The only way FreeBSD reaches here is if we have VRF's but we 5857 * still add the ifdef to make it compile on old versions. 5858 */ 5859 retry: 5860 SCTP_IPI_ITERATOR_WQ_LOCK(); 5861 /* 5862 * sctp_iterator_worker() might be working on an it entry without 5863 * holding the lock. We won't find it on the list either and 5864 * continue and free/destroy it. While holding the lock, spin, to 5865 * avoid the race condition as sctp_iterator_worker() will have to 5866 * wait to re-acquire the lock. 5867 */ 5868 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5869 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5870 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5871 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5872 DELAY(10); 5873 goto retry; 5874 } 5875 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5876 if (it->vn != curvnet) { 5877 continue; 5878 } 5879 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5880 if (it->function_atend != NULL) { 5881 (*it->function_atend) (it->pointer, it->val); 5882 } 5883 SCTP_FREE(it, SCTP_M_ITER); 5884 } 5885 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5886 SCTP_ITERATOR_LOCK(); 5887 if ((sctp_it_ctl.cur_it) && 5888 (sctp_it_ctl.cur_it->vn == curvnet)) { 5889 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5890 } 5891 SCTP_ITERATOR_UNLOCK(); 5892 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5893 SCTP_WQ_ADDR_LOCK(); 5894 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5895 LIST_REMOVE(wi, sctp_nxt_addr); 5896 SCTP_DECR_LADDR_COUNT(); 5897 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5898 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5899 } 5900 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5901 } 5902 SCTP_WQ_ADDR_UNLOCK(); 5903 5904 /* 5905 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5906 * destroyed first). 5907 */ 5908 SCTP_IPI_ADDR_WLOCK(); 5909 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5910 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5911 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5912 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5913 /* free the ifa */ 5914 LIST_REMOVE(ifa, next_bucket); 5915 LIST_REMOVE(ifa, next_ifa); 5916 SCTP_FREE(ifa, SCTP_M_IFA); 5917 } 5918 /* free the ifn */ 5919 LIST_REMOVE(ifn, next_bucket); 5920 LIST_REMOVE(ifn, next_ifn); 5921 SCTP_FREE(ifn, SCTP_M_IFN); 5922 } 5923 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5924 /* free the vrf */ 5925 LIST_REMOVE(vrf, next_vrf); 5926 SCTP_FREE(vrf, SCTP_M_VRF); 5927 } 5928 SCTP_IPI_ADDR_WUNLOCK(); 5929 /* free the vrf hashes */ 5930 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5931 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5932 5933 /* 5934 * free the TIMEWAIT list elements malloc'd in the function 5935 * sctp_add_vtag_to_timewait()... 5936 */ 5937 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5938 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5939 if (!LIST_EMPTY(chain)) { 5940 prev_twait_block = NULL; 5941 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5942 if (prev_twait_block) { 5943 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5944 } 5945 prev_twait_block = twait_block; 5946 } 5947 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5948 } 5949 } 5950 5951 /* free the locks and mutexes */ 5952 #ifdef SCTP_PACKET_LOGGING 5953 SCTP_IP_PKTLOG_DESTROY(); 5954 #endif 5955 SCTP_IPI_ADDR_DESTROY(); 5956 SCTP_STATLOG_DESTROY(); 5957 SCTP_INP_INFO_LOCK_DESTROY(); 5958 5959 SCTP_WQ_ADDR_DESTROY(); 5960 5961 /* Get rid of other stuff too. */ 5962 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5963 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5964 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5965 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5966 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5967 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5968 5969 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5970 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5971 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5972 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5973 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5974 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5975 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5976 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5977 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5978 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5979 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5980 #endif 5981 } 5982 5983 int 5984 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5985 int offset, int limit, 5986 struct sockaddr *src, struct sockaddr *dst, 5987 struct sockaddr *altsa, uint16_t port) 5988 { 5989 /* 5990 * grub through the INIT pulling addresses and loading them to the 5991 * nets structure in the asoc. The from address in the mbuf should 5992 * also be loaded (if it is not already). This routine can be called 5993 * with either INIT or INIT-ACK's as long as the m points to the IP 5994 * packet and the offset points to the beginning of the parameters. 5995 */ 5996 struct sctp_inpcb *inp; 5997 struct sctp_nets *net, *nnet, *net_tmp; 5998 struct sctp_paramhdr *phdr, param_buf; 5999 struct sctp_tcb *stcb_tmp; 6000 uint16_t ptype, plen; 6001 struct sockaddr *sa; 6002 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6003 struct sctp_auth_random *p_random = NULL; 6004 uint16_t random_len = 0; 6005 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6006 struct sctp_auth_hmac_algo *hmacs = NULL; 6007 uint16_t hmacs_len = 0; 6008 uint8_t saw_asconf = 0; 6009 uint8_t saw_asconf_ack = 0; 6010 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6011 struct sctp_auth_chunk_list *chunks = NULL; 6012 uint16_t num_chunks = 0; 6013 sctp_key_t *new_key; 6014 uint32_t keylen; 6015 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6016 uint8_t peer_supports_ecn; 6017 uint8_t peer_supports_prsctp; 6018 uint8_t peer_supports_auth; 6019 uint8_t peer_supports_asconf; 6020 uint8_t peer_supports_asconf_ack; 6021 uint8_t peer_supports_reconfig; 6022 uint8_t peer_supports_nrsack; 6023 uint8_t peer_supports_pktdrop; 6024 uint8_t peer_supports_idata; 6025 #ifdef INET 6026 struct sockaddr_in sin; 6027 #endif 6028 #ifdef INET6 6029 struct sockaddr_in6 sin6; 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 peer_supports_idata = 0; 6051 peer_supports_ecn = 0; 6052 peer_supports_prsctp = 0; 6053 peer_supports_auth = 0; 6054 peer_supports_asconf = 0; 6055 peer_supports_asconf_ack = 0; 6056 peer_supports_reconfig = 0; 6057 peer_supports_nrsack = 0; 6058 peer_supports_pktdrop = 0; 6059 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6060 /* mark all addresses that we have currently on the list */ 6061 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6062 } 6063 /* does the source address already exist? if so skip it */ 6064 inp = stcb->sctp_ep; 6065 atomic_add_int(&stcb->asoc.refcnt, 1); 6066 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6067 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6068 6069 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6070 /* we must add the source address */ 6071 /* no scope set here since we have a tcb already. */ 6072 switch (sa->sa_family) { 6073 #ifdef INET 6074 case AF_INET: 6075 if (stcb->asoc.scope.ipv4_addr_legal) { 6076 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6077 return (-1); 6078 } 6079 } 6080 break; 6081 #endif 6082 #ifdef INET6 6083 case AF_INET6: 6084 if (stcb->asoc.scope.ipv6_addr_legal) { 6085 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6086 return (-2); 6087 } 6088 } 6089 break; 6090 #endif 6091 default: 6092 break; 6093 } 6094 } else { 6095 if (net_tmp != NULL && stcb_tmp == stcb) { 6096 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6097 } else if (stcb_tmp != stcb) { 6098 /* It belongs to another association? */ 6099 if (stcb_tmp) 6100 SCTP_TCB_UNLOCK(stcb_tmp); 6101 return (-3); 6102 } 6103 } 6104 if (stcb->asoc.state == 0) { 6105 /* the assoc was freed? */ 6106 return (-4); 6107 } 6108 /* now we must go through each of the params. */ 6109 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6110 while (phdr) { 6111 ptype = ntohs(phdr->param_type); 6112 plen = ntohs(phdr->param_length); 6113 /* 6114 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6115 * (uint32_t)ptype, (int)plen); 6116 */ 6117 if (offset + plen > limit) { 6118 break; 6119 } 6120 if (plen < sizeof(struct sctp_paramhdr)) { 6121 break; 6122 } 6123 #ifdef INET 6124 if (ptype == SCTP_IPV4_ADDRESS) { 6125 if (stcb->asoc.scope.ipv4_addr_legal) { 6126 struct sctp_ipv4addr_param *p4, p4_buf; 6127 6128 /* ok get the v4 address and check/add */ 6129 phdr = sctp_get_next_param(m, offset, 6130 (struct sctp_paramhdr *)&p4_buf, 6131 sizeof(p4_buf)); 6132 if (plen != sizeof(struct sctp_ipv4addr_param) || 6133 phdr == NULL) { 6134 return (-5); 6135 } 6136 p4 = (struct sctp_ipv4addr_param *)phdr; 6137 sin.sin_addr.s_addr = p4->addr; 6138 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6139 /* Skip multi-cast addresses */ 6140 goto next_param; 6141 } 6142 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6143 (sin.sin_addr.s_addr == INADDR_ANY)) { 6144 goto next_param; 6145 } 6146 sa = (struct sockaddr *)&sin; 6147 inp = stcb->sctp_ep; 6148 atomic_add_int(&stcb->asoc.refcnt, 1); 6149 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6150 dst, stcb); 6151 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6152 6153 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6154 inp == NULL) { 6155 /* we must add the source address */ 6156 /* 6157 * no scope set since we have a tcb 6158 * already 6159 */ 6160 6161 /* 6162 * we must validate the state again 6163 * here 6164 */ 6165 add_it_now: 6166 if (stcb->asoc.state == 0) { 6167 /* the assoc was freed? */ 6168 return (-7); 6169 } 6170 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6171 return (-8); 6172 } 6173 } else if (stcb_tmp == stcb) { 6174 if (stcb->asoc.state == 0) { 6175 /* the assoc was freed? */ 6176 return (-10); 6177 } 6178 if (net != NULL) { 6179 /* clear flag */ 6180 net->dest_state &= 6181 ~SCTP_ADDR_NOT_IN_ASSOC; 6182 } 6183 } else { 6184 /* 6185 * strange, address is in another 6186 * assoc? straighten out locks. 6187 */ 6188 if (stcb_tmp) { 6189 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6190 struct mbuf *op_err; 6191 char msg[SCTP_DIAG_INFO_LEN]; 6192 6193 /* 6194 * in setup state we 6195 * abort this guy 6196 */ 6197 SCTP_SNPRINTF(msg, sizeof(msg), 6198 "%s:%d at %s", __FILE__, __LINE__, __func__); 6199 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6200 msg); 6201 sctp_abort_an_association(stcb_tmp->sctp_ep, 6202 stcb_tmp, op_err, false, 6203 SCTP_SO_NOT_LOCKED); 6204 goto add_it_now; 6205 } 6206 SCTP_TCB_UNLOCK(stcb_tmp); 6207 } 6208 6209 if (stcb->asoc.state == 0) { 6210 /* the assoc was freed? */ 6211 return (-12); 6212 } 6213 return (-13); 6214 } 6215 } 6216 } else 6217 #endif 6218 #ifdef INET6 6219 if (ptype == SCTP_IPV6_ADDRESS) { 6220 if (stcb->asoc.scope.ipv6_addr_legal) { 6221 /* ok get the v6 address and check/add */ 6222 struct sctp_ipv6addr_param *p6, p6_buf; 6223 6224 phdr = sctp_get_next_param(m, offset, 6225 (struct sctp_paramhdr *)&p6_buf, 6226 sizeof(p6_buf)); 6227 if (plen != sizeof(struct sctp_ipv6addr_param) || 6228 phdr == NULL) { 6229 return (-14); 6230 } 6231 p6 = (struct sctp_ipv6addr_param *)phdr; 6232 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6233 sizeof(p6->addr)); 6234 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6235 /* Skip multi-cast addresses */ 6236 goto next_param; 6237 } 6238 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6239 /* 6240 * Link local make no sense without 6241 * scope 6242 */ 6243 goto next_param; 6244 } 6245 sa = (struct sockaddr *)&sin6; 6246 inp = stcb->sctp_ep; 6247 atomic_add_int(&stcb->asoc.refcnt, 1); 6248 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6249 dst, stcb); 6250 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6251 if (stcb_tmp == NULL && 6252 (inp == stcb->sctp_ep || inp == NULL)) { 6253 /* 6254 * we must validate the state again 6255 * here 6256 */ 6257 add_it_now6: 6258 if (stcb->asoc.state == 0) { 6259 /* the assoc was freed? */ 6260 return (-16); 6261 } 6262 /* 6263 * we must add the address, no scope 6264 * set 6265 */ 6266 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6267 return (-17); 6268 } 6269 } else if (stcb_tmp == stcb) { 6270 /* 6271 * we must validate the state again 6272 * here 6273 */ 6274 if (stcb->asoc.state == 0) { 6275 /* the assoc was freed? */ 6276 return (-19); 6277 } 6278 if (net != NULL) { 6279 /* clear flag */ 6280 net->dest_state &= 6281 ~SCTP_ADDR_NOT_IN_ASSOC; 6282 } 6283 } else { 6284 /* 6285 * strange, address is in another 6286 * assoc? straighten out locks. 6287 */ 6288 if (stcb_tmp) { 6289 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6290 struct mbuf *op_err; 6291 char msg[SCTP_DIAG_INFO_LEN]; 6292 6293 /* 6294 * in setup state we 6295 * abort this guy 6296 */ 6297 SCTP_SNPRINTF(msg, sizeof(msg), 6298 "%s:%d at %s", __FILE__, __LINE__, __func__); 6299 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6300 msg); 6301 sctp_abort_an_association(stcb_tmp->sctp_ep, 6302 stcb_tmp, op_err, false, 6303 SCTP_SO_NOT_LOCKED); 6304 goto add_it_now6; 6305 } 6306 SCTP_TCB_UNLOCK(stcb_tmp); 6307 } 6308 if (stcb->asoc.state == 0) { 6309 /* the assoc was freed? */ 6310 return (-21); 6311 } 6312 return (-22); 6313 } 6314 } 6315 } else 6316 #endif 6317 if (ptype == SCTP_ECN_CAPABLE) { 6318 peer_supports_ecn = 1; 6319 } else if (ptype == SCTP_ULP_ADAPTATION) { 6320 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6321 struct sctp_adaptation_layer_indication ai, 6322 *aip; 6323 6324 phdr = sctp_get_next_param(m, offset, 6325 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6326 aip = (struct sctp_adaptation_layer_indication *)phdr; 6327 if (aip) { 6328 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6329 stcb->asoc.adaptation_needed = 1; 6330 } 6331 } 6332 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6333 struct sctp_asconf_addr_param lstore, *fee; 6334 int lptype; 6335 struct sockaddr *lsa = NULL; 6336 #ifdef INET 6337 struct sctp_asconf_addrv4_param *fii; 6338 #endif 6339 6340 if (stcb->asoc.asconf_supported == 0) { 6341 return (-100); 6342 } 6343 if (plen > sizeof(lstore)) { 6344 return (-23); 6345 } 6346 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6347 return (-101); 6348 } 6349 phdr = sctp_get_next_param(m, offset, 6350 (struct sctp_paramhdr *)&lstore, 6351 plen); 6352 if (phdr == NULL) { 6353 return (-24); 6354 } 6355 fee = (struct sctp_asconf_addr_param *)phdr; 6356 lptype = ntohs(fee->addrp.ph.param_type); 6357 switch (lptype) { 6358 #ifdef INET 6359 case SCTP_IPV4_ADDRESS: 6360 if (plen != 6361 sizeof(struct sctp_asconf_addrv4_param)) { 6362 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6363 (int)sizeof(struct sctp_asconf_addrv4_param), 6364 plen); 6365 } else { 6366 fii = (struct sctp_asconf_addrv4_param *)fee; 6367 sin.sin_addr.s_addr = fii->addrp.addr; 6368 lsa = (struct sockaddr *)&sin; 6369 } 6370 break; 6371 #endif 6372 #ifdef INET6 6373 case SCTP_IPV6_ADDRESS: 6374 if (plen != 6375 sizeof(struct sctp_asconf_addr_param)) { 6376 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6377 (int)sizeof(struct sctp_asconf_addr_param), 6378 plen); 6379 } else { 6380 memcpy(sin6.sin6_addr.s6_addr, 6381 fee->addrp.addr, 6382 sizeof(fee->addrp.addr)); 6383 lsa = (struct sockaddr *)&sin6; 6384 } 6385 break; 6386 #endif 6387 default: 6388 break; 6389 } 6390 if (lsa) { 6391 (void)sctp_set_primary_addr(stcb, sa, NULL); 6392 } 6393 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6394 stcb->asoc.peer_supports_nat = 1; 6395 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6396 /* Peer supports pr-sctp */ 6397 peer_supports_prsctp = 1; 6398 } else if (ptype == SCTP_ZERO_CHECKSUM_ACCEPTABLE) { 6399 struct sctp_zero_checksum_acceptable zero_chksum, 6400 *zero_chksum_p; 6401 6402 phdr = sctp_get_next_param(m, offset, 6403 (struct sctp_paramhdr *)&zero_chksum, 6404 sizeof(struct sctp_zero_checksum_acceptable)); 6405 if (phdr != NULL) { 6406 /* 6407 * Only send zero checksums if the upper 6408 * layer has enabled the support for the 6409 * same method as allowed by the peer. 6410 */ 6411 zero_chksum_p = (struct sctp_zero_checksum_acceptable *)phdr; 6412 if ((ntohl(zero_chksum_p->edmid) != SCTP_EDMID_NONE) && 6413 (ntohl(zero_chksum_p->edmid) == stcb->asoc.rcv_edmid)) { 6414 stcb->asoc.snd_edmid = stcb->asoc.rcv_edmid; 6415 } 6416 } 6417 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6418 /* A supported extension chunk */ 6419 struct sctp_supported_chunk_types_param *pr_supported; 6420 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6421 int num_ent, i; 6422 6423 if (plen > sizeof(local_store)) { 6424 return (-35); 6425 } 6426 phdr = sctp_get_next_param(m, offset, 6427 (struct sctp_paramhdr *)&local_store, plen); 6428 if (phdr == NULL) { 6429 return (-25); 6430 } 6431 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6432 num_ent = plen - sizeof(struct sctp_paramhdr); 6433 for (i = 0; i < num_ent; i++) { 6434 switch (pr_supported->chunk_types[i]) { 6435 case SCTP_ASCONF: 6436 peer_supports_asconf = 1; 6437 break; 6438 case SCTP_ASCONF_ACK: 6439 peer_supports_asconf_ack = 1; 6440 break; 6441 case SCTP_FORWARD_CUM_TSN: 6442 peer_supports_prsctp = 1; 6443 break; 6444 case SCTP_PACKET_DROPPED: 6445 peer_supports_pktdrop = 1; 6446 break; 6447 case SCTP_NR_SELECTIVE_ACK: 6448 peer_supports_nrsack = 1; 6449 break; 6450 case SCTP_STREAM_RESET: 6451 peer_supports_reconfig = 1; 6452 break; 6453 case SCTP_AUTHENTICATION: 6454 peer_supports_auth = 1; 6455 break; 6456 case SCTP_IDATA: 6457 peer_supports_idata = 1; 6458 break; 6459 default: 6460 /* one I have not learned yet */ 6461 break; 6462 } 6463 } 6464 } else if (ptype == SCTP_RANDOM) { 6465 if (plen > sizeof(random_store)) 6466 break; 6467 if (got_random) { 6468 /* already processed a RANDOM */ 6469 goto next_param; 6470 } 6471 phdr = sctp_get_next_param(m, offset, 6472 (struct sctp_paramhdr *)random_store, 6473 plen); 6474 if (phdr == NULL) 6475 return (-26); 6476 p_random = (struct sctp_auth_random *)phdr; 6477 random_len = plen - sizeof(*p_random); 6478 /* enforce the random length */ 6479 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6480 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6481 return (-27); 6482 } 6483 got_random = 1; 6484 } else if (ptype == SCTP_HMAC_LIST) { 6485 uint16_t num_hmacs; 6486 uint16_t i; 6487 6488 if (plen > sizeof(hmacs_store)) 6489 break; 6490 if (got_hmacs) { 6491 /* already processed a HMAC list */ 6492 goto next_param; 6493 } 6494 phdr = sctp_get_next_param(m, offset, 6495 (struct sctp_paramhdr *)hmacs_store, 6496 plen); 6497 if (phdr == NULL) 6498 return (-28); 6499 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6500 hmacs_len = plen - sizeof(*hmacs); 6501 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6502 /* validate the hmac list */ 6503 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6504 return (-29); 6505 } 6506 if (stcb->asoc.peer_hmacs != NULL) 6507 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6508 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6509 if (stcb->asoc.peer_hmacs != NULL) { 6510 for (i = 0; i < num_hmacs; i++) { 6511 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6512 ntohs(hmacs->hmac_ids[i])); 6513 } 6514 } 6515 got_hmacs = 1; 6516 } else if (ptype == SCTP_CHUNK_LIST) { 6517 int i; 6518 6519 if (plen > sizeof(chunks_store)) 6520 break; 6521 if (got_chklist) { 6522 /* already processed a Chunks list */ 6523 goto next_param; 6524 } 6525 phdr = sctp_get_next_param(m, offset, 6526 (struct sctp_paramhdr *)chunks_store, 6527 plen); 6528 if (phdr == NULL) 6529 return (-30); 6530 chunks = (struct sctp_auth_chunk_list *)phdr; 6531 num_chunks = plen - sizeof(*chunks); 6532 if (stcb->asoc.peer_auth_chunks != NULL) 6533 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6534 else 6535 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6536 for (i = 0; i < num_chunks; i++) { 6537 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6538 stcb->asoc.peer_auth_chunks); 6539 /* record asconf/asconf-ack if listed */ 6540 if (chunks->chunk_types[i] == SCTP_ASCONF) 6541 saw_asconf = 1; 6542 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6543 saw_asconf_ack = 1; 6544 } 6545 got_chklist = 1; 6546 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6547 (ptype == SCTP_STATE_COOKIE) || 6548 (ptype == SCTP_UNRECOG_PARAM) || 6549 (ptype == SCTP_COOKIE_PRESERVE) || 6550 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6551 (ptype == SCTP_ADD_IP_ADDRESS) || 6552 (ptype == SCTP_DEL_IP_ADDRESS) || 6553 (ptype == SCTP_ERROR_CAUSE_IND) || 6554 (ptype == SCTP_SUCCESS_REPORT)) { 6555 /* don't care */ 6556 } else { 6557 if ((ptype & 0x8000) == 0x0000) { 6558 /* 6559 * must stop processing the rest of the 6560 * param's. Any report bits were handled 6561 * with the call to 6562 * sctp_arethere_unrecognized_parameters() 6563 * when the INIT or INIT-ACK was first seen. 6564 */ 6565 break; 6566 } 6567 } 6568 6569 next_param: 6570 offset += SCTP_SIZE32(plen); 6571 if (offset >= limit) { 6572 break; 6573 } 6574 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6575 sizeof(param_buf)); 6576 } 6577 /* Now check to see if we need to purge any addresses */ 6578 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6579 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6580 SCTP_ADDR_NOT_IN_ASSOC) { 6581 /* This address has been removed from the asoc */ 6582 /* remove and free it */ 6583 stcb->asoc.numnets--; 6584 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6585 if (net == stcb->asoc.alternate) { 6586 sctp_free_remote_addr(stcb->asoc.alternate); 6587 stcb->asoc.alternate = NULL; 6588 } 6589 if (net == stcb->asoc.primary_destination) { 6590 stcb->asoc.primary_destination = NULL; 6591 sctp_select_primary_destination(stcb); 6592 } 6593 sctp_free_remote_addr(net); 6594 } 6595 } 6596 if ((stcb->asoc.ecn_supported == 1) && 6597 (peer_supports_ecn == 0)) { 6598 stcb->asoc.ecn_supported = 0; 6599 } 6600 if ((stcb->asoc.prsctp_supported == 1) && 6601 (peer_supports_prsctp == 0)) { 6602 stcb->asoc.prsctp_supported = 0; 6603 } 6604 if ((stcb->asoc.auth_supported == 1) && 6605 ((peer_supports_auth == 0) || 6606 (got_random == 0) || (got_hmacs == 0))) { 6607 stcb->asoc.auth_supported = 0; 6608 } 6609 if ((stcb->asoc.asconf_supported == 1) && 6610 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6611 (stcb->asoc.auth_supported == 0) || 6612 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6613 stcb->asoc.asconf_supported = 0; 6614 } 6615 if ((stcb->asoc.reconfig_supported == 1) && 6616 (peer_supports_reconfig == 0)) { 6617 stcb->asoc.reconfig_supported = 0; 6618 } 6619 if ((stcb->asoc.idata_supported == 1) && 6620 (peer_supports_idata == 0)) { 6621 stcb->asoc.idata_supported = 0; 6622 } 6623 if ((stcb->asoc.nrsack_supported == 1) && 6624 (peer_supports_nrsack == 0)) { 6625 stcb->asoc.nrsack_supported = 0; 6626 } 6627 if ((stcb->asoc.pktdrop_supported == 1) && 6628 (peer_supports_pktdrop == 0)) { 6629 stcb->asoc.pktdrop_supported = 0; 6630 } 6631 /* validate authentication required parameters */ 6632 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6633 /* peer does not support auth but sent a chunks list? */ 6634 return (-31); 6635 } 6636 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6637 /* peer supports asconf but not auth? */ 6638 return (-32); 6639 } else if ((peer_supports_asconf == 1) && 6640 (peer_supports_auth == 1) && 6641 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6642 return (-33); 6643 } 6644 /* concatenate the full random key */ 6645 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6646 if (chunks != NULL) { 6647 keylen += sizeof(*chunks) + num_chunks; 6648 } 6649 new_key = sctp_alloc_key(keylen); 6650 if (new_key != NULL) { 6651 /* copy in the RANDOM */ 6652 if (p_random != NULL) { 6653 keylen = sizeof(*p_random) + random_len; 6654 memcpy(new_key->key, p_random, keylen); 6655 } else { 6656 keylen = 0; 6657 } 6658 /* append in the AUTH chunks */ 6659 if (chunks != NULL) { 6660 memcpy(new_key->key + keylen, chunks, 6661 sizeof(*chunks) + num_chunks); 6662 keylen += sizeof(*chunks) + num_chunks; 6663 } 6664 /* append in the HMACs */ 6665 if (hmacs != NULL) { 6666 memcpy(new_key->key + keylen, hmacs, 6667 sizeof(*hmacs) + hmacs_len); 6668 } 6669 } else { 6670 /* failed to get memory for the key */ 6671 return (-34); 6672 } 6673 if (stcb->asoc.authinfo.peer_random != NULL) 6674 sctp_free_key(stcb->asoc.authinfo.peer_random); 6675 stcb->asoc.authinfo.peer_random = new_key; 6676 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6677 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6678 6679 return (0); 6680 } 6681 6682 int 6683 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6684 struct sctp_nets *net) 6685 { 6686 /* make sure the requested primary address exists in the assoc */ 6687 if (net == NULL && sa) 6688 net = sctp_findnet(stcb, sa); 6689 6690 if (net == NULL) { 6691 /* didn't find the requested primary address! */ 6692 return (-1); 6693 } else { 6694 /* set the primary address */ 6695 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6696 /* Must be confirmed, so queue to set */ 6697 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6698 return (0); 6699 } 6700 stcb->asoc.primary_destination = net; 6701 if (((net->dest_state & SCTP_ADDR_PF) == 0) && 6702 (stcb->asoc.alternate != NULL)) { 6703 sctp_free_remote_addr(stcb->asoc.alternate); 6704 stcb->asoc.alternate = NULL; 6705 } 6706 net = TAILQ_FIRST(&stcb->asoc.nets); 6707 if (net != stcb->asoc.primary_destination) { 6708 /* 6709 * first one on the list is NOT the primary 6710 * sctp_cmpaddr() is much more efficient if the 6711 * primary is the first on the list, make it so. 6712 */ 6713 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6714 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6715 } 6716 return (0); 6717 } 6718 } 6719 6720 bool 6721 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6722 { 6723 struct sctpasochead *head; 6724 struct sctp_tcb *stcb; 6725 6726 SCTP_INP_INFO_LOCK_ASSERT(); 6727 6728 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, SCTP_BASE_INFO(hashasocmark))]; 6729 LIST_FOREACH(stcb, head, sctp_asocs) { 6730 /* 6731 * We choose not to lock anything here. TCB's can't be 6732 * removed since we have the read lock, so they can't be 6733 * freed on us, same thing for the INP. I may be wrong with 6734 * this assumption, but we will go with it for now :-) 6735 */ 6736 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6737 continue; 6738 } 6739 if (stcb->asoc.my_vtag == tag) { 6740 /* candidate */ 6741 if (stcb->rport != rport) { 6742 continue; 6743 } 6744 if (stcb->sctp_ep->sctp_lport != lport) { 6745 continue; 6746 } 6747 /* The tag is currently used, so don't use it. */ 6748 return (false); 6749 } 6750 } 6751 return (!sctp_is_in_timewait(tag, lport, rport, (uint32_t)now->tv_sec)); 6752 } 6753 6754 static void 6755 sctp_drain_mbufs(struct sctp_tcb *stcb) 6756 { 6757 /* 6758 * We must hunt this association for MBUF's past the cumack (i.e. 6759 * out of order data that we can renege on). 6760 */ 6761 struct sctp_association *asoc; 6762 struct sctp_tmit_chunk *chk, *nchk; 6763 uint32_t cumulative_tsn_p1; 6764 struct sctp_queued_to_read *control, *ncontrol; 6765 int cnt, strmat; 6766 uint32_t gap, i; 6767 int fnd = 0; 6768 6769 /* We look for anything larger than the cum-ack + 1 */ 6770 6771 asoc = &stcb->asoc; 6772 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6773 /* none we can reneg on. */ 6774 return; 6775 } 6776 SCTP_STAT_INCR(sctps_protocol_drains_done); 6777 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6778 cnt = 0; 6779 /* Ok that was fun, now we will drain all the inbound streams? */ 6780 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6781 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6782 #ifdef INVARIANTS 6783 if (control->on_strm_q != SCTP_ON_ORDERED) { 6784 panic("Huh control: %p on_q: %d -- not ordered?", 6785 control, control->on_strm_q); 6786 } 6787 #endif 6788 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6789 /* Yep it is above cum-ack */ 6790 cnt++; 6791 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6792 KASSERT(control->length > 0, ("control has zero length")); 6793 if (asoc->size_on_all_streams >= control->length) { 6794 asoc->size_on_all_streams -= control->length; 6795 } else { 6796 #ifdef INVARIANTS 6797 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6798 #else 6799 asoc->size_on_all_streams = 0; 6800 #endif 6801 } 6802 sctp_ucount_decr(asoc->cnt_on_all_streams); 6803 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6804 if (control->on_read_q) { 6805 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6806 control->on_read_q = 0; 6807 } 6808 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6809 control->on_strm_q = 0; 6810 if (control->data) { 6811 sctp_m_freem(control->data); 6812 control->data = NULL; 6813 } 6814 sctp_free_remote_addr(control->whoFrom); 6815 /* Now its reasm? */ 6816 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6817 cnt++; 6818 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6819 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6820 if (asoc->size_on_reasm_queue >= chk->send_size) { 6821 asoc->size_on_reasm_queue -= chk->send_size; 6822 } else { 6823 #ifdef INVARIANTS 6824 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6825 #else 6826 asoc->size_on_reasm_queue = 0; 6827 #endif 6828 } 6829 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6830 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6831 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6832 if (chk->data) { 6833 sctp_m_freem(chk->data); 6834 chk->data = NULL; 6835 } 6836 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6837 } 6838 sctp_free_a_readq(stcb, control); 6839 } 6840 } 6841 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6842 #ifdef INVARIANTS 6843 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6844 panic("Huh control: %p on_q: %d -- not unordered?", 6845 control, control->on_strm_q); 6846 } 6847 #endif 6848 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6849 /* Yep it is above cum-ack */ 6850 cnt++; 6851 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6852 KASSERT(control->length > 0, ("control has zero length")); 6853 if (asoc->size_on_all_streams >= control->length) { 6854 asoc->size_on_all_streams -= control->length; 6855 } else { 6856 #ifdef INVARIANTS 6857 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6858 #else 6859 asoc->size_on_all_streams = 0; 6860 #endif 6861 } 6862 sctp_ucount_decr(asoc->cnt_on_all_streams); 6863 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6864 if (control->on_read_q) { 6865 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6866 control->on_read_q = 0; 6867 } 6868 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6869 control->on_strm_q = 0; 6870 if (control->data) { 6871 sctp_m_freem(control->data); 6872 control->data = NULL; 6873 } 6874 sctp_free_remote_addr(control->whoFrom); 6875 /* Now its reasm? */ 6876 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6877 cnt++; 6878 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6879 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6880 if (asoc->size_on_reasm_queue >= chk->send_size) { 6881 asoc->size_on_reasm_queue -= chk->send_size; 6882 } else { 6883 #ifdef INVARIANTS 6884 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6885 #else 6886 asoc->size_on_reasm_queue = 0; 6887 #endif 6888 } 6889 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6890 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6891 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6892 if (chk->data) { 6893 sctp_m_freem(chk->data); 6894 chk->data = NULL; 6895 } 6896 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6897 } 6898 sctp_free_a_readq(stcb, control); 6899 } 6900 } 6901 } 6902 if (cnt) { 6903 /* We must back down to see what the new highest is */ 6904 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6905 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6906 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6907 asoc->highest_tsn_inside_map = i; 6908 fnd = 1; 6909 break; 6910 } 6911 } 6912 if (!fnd) { 6913 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6914 } 6915 6916 /* 6917 * Question, should we go through the delivery queue? The 6918 * only reason things are on here is the app not reading OR 6919 * a p-d-api up. An attacker COULD send enough in to 6920 * initiate the PD-API and then send a bunch of stuff to 6921 * other streams... these would wind up on the delivery 6922 * queue.. and then we would not get to them. But in order 6923 * to do this I then have to back-track and un-deliver 6924 * sequence numbers in streams.. el-yucko. I think for now 6925 * we will NOT look at the delivery queue and leave it to be 6926 * something to consider later. An alternative would be to 6927 * abort the P-D-API with a notification and then deliver 6928 * the data.... Or another method might be to keep track of 6929 * how many times the situation occurs and if we see a 6930 * possible attack underway just abort the association. 6931 */ 6932 #ifdef SCTP_DEBUG 6933 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6934 #endif 6935 /* 6936 * Now do we need to find a new 6937 * asoc->highest_tsn_inside_map? 6938 */ 6939 asoc->last_revoke_count = cnt; 6940 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6941 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6942 /* sa_ignore NO_NULL_CHK */ 6943 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6944 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6945 } 6946 /* 6947 * Another issue, in un-setting the TSN's in the mapping array we 6948 * DID NOT adjust the highest_tsn marker. This will cause one of 6949 * two things to occur. It may cause us to do extra work in checking 6950 * for our mapping array movement. More importantly it may cause us 6951 * to SACK every datagram. This may not be a bad thing though since 6952 * we will recover once we get our cum-ack above and all this stuff 6953 * we dumped recovered. 6954 */ 6955 } 6956 6957 static void 6958 sctp_drain(void) 6959 { 6960 struct epoch_tracker et; 6961 6962 VNET_ITERATOR_DECL(vnet_iter); 6963 6964 NET_EPOCH_ENTER(et); 6965 /* 6966 * We must walk the PCB lists for ALL associations here. The system 6967 * is LOW on MBUF's and needs help. This is where reneging will 6968 * occur. We really hope this does NOT happen! 6969 */ 6970 VNET_LIST_RLOCK_NOSLEEP(); 6971 VNET_FOREACH(vnet_iter) { 6972 CURVNET_SET(vnet_iter); 6973 struct sctp_inpcb *inp; 6974 struct sctp_tcb *stcb; 6975 6976 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6977 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6978 #ifdef VIMAGE 6979 continue; 6980 #else 6981 NET_EPOCH_EXIT(et); 6982 return; 6983 #endif 6984 } 6985 SCTP_INP_INFO_RLOCK(); 6986 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6987 /* For each endpoint */ 6988 SCTP_INP_RLOCK(inp); 6989 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6990 /* For each association */ 6991 SCTP_TCB_LOCK(stcb); 6992 sctp_drain_mbufs(stcb); 6993 SCTP_TCB_UNLOCK(stcb); 6994 } 6995 SCTP_INP_RUNLOCK(inp); 6996 } 6997 SCTP_INP_INFO_RUNLOCK(); 6998 CURVNET_RESTORE(); 6999 } 7000 VNET_LIST_RUNLOCK_NOSLEEP(); 7001 NET_EPOCH_EXIT(et); 7002 } 7003 7004 EVENTHANDLER_DEFINE(vm_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT); 7005 EVENTHANDLER_DEFINE(mbuf_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT); 7006 7007 /* 7008 * start a new iterator 7009 * iterates through all endpoints and associations based on the pcb_state 7010 * flags and asoc_state. "af" (mandatory) is executed for all matching 7011 * assocs and "ef" (optional) is executed when the iterator completes. 7012 * "inpf" (optional) is executed for each new endpoint as it is being 7013 * iterated through. inpe (optional) is called when the inp completes 7014 * its way through all the stcbs. 7015 */ 7016 int 7017 sctp_initiate_iterator(inp_func inpf, 7018 asoc_func af, 7019 inp_func inpe, 7020 uint32_t pcb_state, 7021 uint32_t pcb_features, 7022 uint32_t asoc_state, 7023 void *argp, 7024 uint32_t argi, 7025 end_func ef, 7026 struct sctp_inpcb *s_inp, 7027 uint8_t chunk_output_off) 7028 { 7029 struct sctp_iterator *it = NULL; 7030 7031 if (af == NULL) { 7032 return (-1); 7033 } 7034 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7035 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7036 SCTP_BASE_VAR(sctp_pcb_initialized)); 7037 return (-1); 7038 } 7039 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7040 SCTP_M_ITER); 7041 if (it == NULL) { 7042 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7043 return (-1); 7044 } 7045 memset(it, 0, sizeof(*it)); 7046 it->function_assoc = af; 7047 it->function_inp = inpf; 7048 if (inpf) 7049 it->done_current_ep = 0; 7050 else 7051 it->done_current_ep = 1; 7052 it->function_atend = ef; 7053 it->pointer = argp; 7054 it->val = argi; 7055 it->pcb_flags = pcb_state; 7056 it->pcb_features = pcb_features; 7057 it->asoc_state = asoc_state; 7058 it->function_inp_end = inpe; 7059 it->no_chunk_output = chunk_output_off; 7060 it->vn = curvnet; 7061 if (s_inp) { 7062 /* Assume lock is held here */ 7063 it->inp = s_inp; 7064 SCTP_INP_INCR_REF(it->inp); 7065 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7066 } else { 7067 SCTP_INP_INFO_RLOCK(); 7068 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7069 if (it->inp) { 7070 SCTP_INP_INCR_REF(it->inp); 7071 } 7072 SCTP_INP_INFO_RUNLOCK(); 7073 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7074 } 7075 SCTP_IPI_ITERATOR_WQ_LOCK(); 7076 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7077 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7078 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7079 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7080 SCTP_FREE(it, SCTP_M_ITER); 7081 return (-1); 7082 } 7083 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7084 if (sctp_it_ctl.iterator_running == 0) { 7085 sctp_wakeup_iterator(); 7086 } 7087 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7088 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7089 return (0); 7090 } 7091 7092 /* 7093 * Atomically add flags to the sctp_flags of an inp. 7094 * To be used when the write lock of the inp is not held. 7095 */ 7096 void 7097 sctp_pcb_add_flags(struct sctp_inpcb *inp, uint32_t flags) 7098 { 7099 uint32_t old_flags, new_flags; 7100 7101 do { 7102 old_flags = inp->sctp_flags; 7103 new_flags = old_flags | flags; 7104 } while (atomic_cmpset_int(&inp->sctp_flags, old_flags, new_flags) == 0); 7105 } 7106