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 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <sys/proc.h> 40 #include <netinet/sctp_var.h> 41 #include <netinet/sctp_sysctl.h> 42 #include <netinet/sctp_pcb.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp.h> 45 #include <netinet/sctp_header.h> 46 #include <netinet/sctp_asconf.h> 47 #include <netinet/sctp_output.h> 48 #include <netinet/sctp_timer.h> 49 #include <netinet/sctp_bsd_addr.h> 50 #if defined(INET) || defined(INET6) 51 #include <netinet/udp.h> 52 #endif 53 #ifdef INET6 54 #include <netinet6/ip6_var.h> 55 #endif 56 #include <sys/sched.h> 57 #include <sys/smp.h> 58 #include <sys/unistd.h> 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 #endif 79 80 void 81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 82 { 83 /* 84 * We really don't need to lock this, but I will just because it 85 * does not hurt. 86 */ 87 SCTP_INP_INFO_RLOCK(); 88 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 89 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 90 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 91 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 92 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 93 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 94 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 95 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 96 SCTP_INP_INFO_RUNLOCK(); 97 } 98 99 /*- 100 * Addresses are added to VRF's (Virtual Router's). For BSD we 101 * have only the default VRF 0. We maintain a hash list of 102 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 103 * these has a list of addresses. When we add a new address 104 * to a VRF we lookup the ifn/ifn_index, if the ifn does 105 * not exist we create it and add it to the list of IFN's 106 * within the VRF. Once we have the sctp_ifn, we add the 107 * address to the list. So we look something like: 108 * 109 * hash-vrf-table 110 * vrf-> ifn-> ifn -> ifn 111 * vrf | 112 * ... +--ifa-> ifa -> ifa 113 * vrf 114 * 115 * We keep these separate lists since the SCTP subsystem will 116 * point to these from its source address selection nets structure. 117 * When an address is deleted it does not happen right away on 118 * the SCTP side, it gets scheduled. What we do when a 119 * delete happens is immediately remove the address from 120 * the master list and decrement the refcount. As our 121 * addip iterator works through and frees the src address 122 * selection pointing to the sctp_ifa, eventually the refcount 123 * will reach 0 and we will delete it. Note that it is assumed 124 * that any locking on system level ifn/ifa is done at the 125 * caller of these functions and these routines will only 126 * lock the SCTP structures as they add or delete things. 127 * 128 * Other notes on VRF concepts. 129 * - An endpoint can be in multiple VRF's 130 * - An association lives within a VRF and only one VRF. 131 * - Any incoming packet we can deduce the VRF for by 132 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 133 * - Any downward send call or connect call must supply the 134 * VRF via ancillary data or via some sort of set default 135 * VRF socket option call (again for BSD no brainer since 136 * the VRF is always 0). 137 * - An endpoint may add multiple VRF's to it. 138 * - Listening sockets can accept associations in any 139 * of the VRF's they are in but the assoc will end up 140 * in only one VRF (gotten from the packet or connect/send). 141 * 142 */ 143 144 struct sctp_vrf * 145 sctp_allocate_vrf(int vrf_id) 146 { 147 struct sctp_vrf *vrf = NULL; 148 struct sctp_vrflist *bucket; 149 150 /* First allocate the VRF structure */ 151 vrf = sctp_find_vrf(vrf_id); 152 if (vrf) { 153 /* Already allocated */ 154 return (vrf); 155 } 156 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 157 SCTP_M_VRF); 158 if (vrf == NULL) { 159 /* No memory */ 160 #ifdef INVARIANTS 161 panic("No memory for VRF:%d", vrf_id); 162 #endif 163 return (NULL); 164 } 165 /* setup the VRF */ 166 memset(vrf, 0, sizeof(struct sctp_vrf)); 167 vrf->vrf_id = vrf_id; 168 LIST_INIT(&vrf->ifnlist); 169 vrf->total_ifa_count = 0; 170 vrf->refcount = 0; 171 /* now also setup table ids */ 172 SCTP_INIT_VRF_TABLEID(vrf); 173 /* Init the HASH of addresses */ 174 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 175 &vrf->vrf_addr_hashmark); 176 if (vrf->vrf_addr_hash == NULL) { 177 /* No memory */ 178 #ifdef INVARIANTS 179 panic("No memory for VRF:%d", vrf_id); 180 #endif 181 SCTP_FREE(vrf, SCTP_M_VRF); 182 return (NULL); 183 } 184 185 /* Add it to the hash table */ 186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 187 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 189 return (vrf); 190 } 191 192 struct sctp_ifn * 193 sctp_find_ifn(void *ifn, uint32_t ifn_index) 194 { 195 struct sctp_ifn *sctp_ifnp; 196 struct sctp_ifnlist *hash_ifn_head; 197 198 /* 199 * We assume the lock is held for the addresses if that's wrong 200 * problems could occur :-) 201 */ 202 SCTP_IPI_ADDR_LOCK_ASSERT(); 203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 205 if (sctp_ifnp->ifn_index == ifn_index) { 206 return (sctp_ifnp); 207 } 208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 209 return (sctp_ifnp); 210 } 211 } 212 return (NULL); 213 } 214 215 struct sctp_vrf * 216 sctp_find_vrf(uint32_t vrf_id) 217 { 218 struct sctp_vrflist *bucket; 219 struct sctp_vrf *liste; 220 221 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 222 LIST_FOREACH(liste, bucket, next_vrf) { 223 if (vrf_id == liste->vrf_id) { 224 return (liste); 225 } 226 } 227 return (NULL); 228 } 229 230 void 231 sctp_free_vrf(struct sctp_vrf *vrf) 232 { 233 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 234 if (vrf->vrf_addr_hash) { 235 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 236 vrf->vrf_addr_hash = NULL; 237 } 238 /* We zero'd the count */ 239 LIST_REMOVE(vrf, next_vrf); 240 SCTP_FREE(vrf, SCTP_M_VRF); 241 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 242 } 243 } 244 245 void 246 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 247 { 248 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 249 /* We zero'd the count */ 250 if (sctp_ifnp->vrf) { 251 sctp_free_vrf(sctp_ifnp->vrf); 252 } 253 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 254 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 255 } 256 } 257 258 void 259 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 260 { 261 struct sctp_ifn *sctp_ifnp; 262 263 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 264 if (sctp_ifnp != NULL) { 265 sctp_ifnp->ifn_mtu = mtu; 266 } 267 } 268 269 void 270 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 271 { 272 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 273 /* We zero'd the count */ 274 if (sctp_ifap->ifn_p) { 275 sctp_free_ifn(sctp_ifap->ifn_p); 276 } 277 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 278 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 279 } 280 } 281 282 static void 283 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 284 { 285 struct sctp_ifn *found; 286 287 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 288 if (found == NULL) { 289 /* Not in the list.. sorry */ 290 return; 291 } 292 if (hold_addr_lock == 0) { 293 SCTP_IPI_ADDR_WLOCK(); 294 } else { 295 SCTP_IPI_ADDR_WLOCK_ASSERT(); 296 } 297 LIST_REMOVE(sctp_ifnp, next_bucket); 298 LIST_REMOVE(sctp_ifnp, next_ifn); 299 if (hold_addr_lock == 0) { 300 SCTP_IPI_ADDR_WUNLOCK(); 301 } 302 /* Take away the reference, and possibly free it */ 303 sctp_free_ifn(sctp_ifnp); 304 } 305 306 void 307 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 308 const char *if_name, uint32_t ifn_index) 309 { 310 struct sctp_vrf *vrf; 311 struct sctp_ifa *sctp_ifap; 312 313 SCTP_IPI_ADDR_RLOCK(); 314 vrf = sctp_find_vrf(vrf_id); 315 if (vrf == NULL) { 316 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 317 goto out; 318 } 319 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 320 if (sctp_ifap == NULL) { 321 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 322 goto out; 323 } 324 if (sctp_ifap->ifn_p == NULL) { 325 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 326 goto out; 327 } 328 if (if_name) { 329 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 331 sctp_ifap->ifn_p->ifn_name, if_name); 332 goto out; 333 } 334 } else { 335 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 337 sctp_ifap->ifn_p->ifn_index, ifn_index); 338 goto out; 339 } 340 } 341 342 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 343 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 344 out: 345 SCTP_IPI_ADDR_RUNLOCK(); 346 } 347 348 void 349 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 350 const char *if_name, uint32_t ifn_index) 351 { 352 struct sctp_vrf *vrf; 353 struct sctp_ifa *sctp_ifap; 354 355 SCTP_IPI_ADDR_RLOCK(); 356 vrf = sctp_find_vrf(vrf_id); 357 if (vrf == NULL) { 358 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 359 goto out; 360 } 361 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 362 if (sctp_ifap == NULL) { 363 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 364 goto out; 365 } 366 if (sctp_ifap->ifn_p == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 368 goto out; 369 } 370 if (if_name) { 371 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 372 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 373 sctp_ifap->ifn_p->ifn_name, if_name); 374 goto out; 375 } 376 } else { 377 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 379 sctp_ifap->ifn_p->ifn_index, ifn_index); 380 goto out; 381 } 382 } 383 384 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 385 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 386 out: 387 SCTP_IPI_ADDR_RUNLOCK(); 388 } 389 390 /*- 391 * Add an ifa to an ifn. 392 * Register the interface as necessary. 393 * NOTE: ADDR write lock MUST be held. 394 */ 395 static void 396 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 397 { 398 int ifa_af; 399 400 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 401 sctp_ifap->ifn_p = sctp_ifnp; 402 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 403 /* update address counts */ 404 sctp_ifnp->ifa_count++; 405 ifa_af = sctp_ifap->address.sa.sa_family; 406 switch (ifa_af) { 407 #ifdef INET 408 case AF_INET: 409 sctp_ifnp->num_v4++; 410 break; 411 #endif 412 #ifdef INET6 413 case AF_INET6: 414 sctp_ifnp->num_v6++; 415 break; 416 #endif 417 default: 418 break; 419 } 420 if (sctp_ifnp->ifa_count == 1) { 421 /* register the new interface */ 422 sctp_ifnp->registered_af = ifa_af; 423 } 424 } 425 426 /*- 427 * Remove an ifa from its ifn. 428 * If no more addresses exist, remove the ifn too. Otherwise, re-register 429 * the interface based on the remaining address families left. 430 * NOTE: ADDR write lock MUST be held. 431 */ 432 static void 433 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 434 { 435 LIST_REMOVE(sctp_ifap, next_ifa); 436 if (sctp_ifap->ifn_p) { 437 /* update address counts */ 438 sctp_ifap->ifn_p->ifa_count--; 439 switch (sctp_ifap->address.sa.sa_family) { 440 #ifdef INET 441 case AF_INET: 442 sctp_ifap->ifn_p->num_v4--; 443 break; 444 #endif 445 #ifdef INET6 446 case AF_INET6: 447 sctp_ifap->ifn_p->num_v6--; 448 break; 449 #endif 450 default: 451 break; 452 } 453 454 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 455 /* remove the ifn, possibly freeing it */ 456 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 457 } else { 458 /* re-register address family type, if needed */ 459 if ((sctp_ifap->ifn_p->num_v6 == 0) && 460 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 461 sctp_ifap->ifn_p->registered_af = AF_INET; 462 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 463 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 464 sctp_ifap->ifn_p->registered_af = AF_INET6; 465 } 466 /* free the ifn refcount */ 467 sctp_free_ifn(sctp_ifap->ifn_p); 468 } 469 sctp_ifap->ifn_p = NULL; 470 } 471 } 472 473 struct sctp_ifa * 474 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 475 uint32_t ifn_type, const char *if_name, void *ifa, 476 struct sockaddr *addr, uint32_t ifa_flags, 477 int dynamic_add) 478 { 479 struct sctp_vrf *vrf; 480 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp; 481 struct sctp_ifa *sctp_ifap, *new_sctp_ifap; 482 struct sctp_ifalist *hash_addr_head; 483 struct sctp_ifnlist *hash_ifn_head; 484 uint32_t hash_of_addr; 485 int new_ifn_af = 0; 486 487 #ifdef SCTP_DEBUG 488 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 489 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 490 #endif 491 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *, 492 sizeof(struct sctp_ifn), SCTP_M_IFN); 493 if (new_sctp_ifnp == NULL) { 494 #ifdef INVARIANTS 495 panic("No memory for IFN"); 496 #endif 497 return (NULL); 498 } 499 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 500 if (new_sctp_ifap == NULL) { 501 #ifdef INVARIANTS 502 panic("No memory for IFA"); 503 #endif 504 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 505 return (NULL); 506 } 507 508 SCTP_IPI_ADDR_WLOCK(); 509 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 510 if (sctp_ifnp) { 511 vrf = sctp_ifnp->vrf; 512 } else { 513 vrf = sctp_find_vrf(vrf_id); 514 if (vrf == NULL) { 515 vrf = sctp_allocate_vrf(vrf_id); 516 if (vrf == NULL) { 517 SCTP_IPI_ADDR_WUNLOCK(); 518 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 519 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 520 return (NULL); 521 } 522 } 523 } 524 if (sctp_ifnp == NULL) { 525 /* 526 * build one and add it, can't hold lock until after malloc 527 * done though. 528 */ 529 sctp_ifnp = new_sctp_ifnp; 530 new_sctp_ifnp = NULL; 531 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 532 sctp_ifnp->ifn_index = ifn_index; 533 sctp_ifnp->ifn_p = ifn; 534 sctp_ifnp->ifn_type = ifn_type; 535 sctp_ifnp->refcount = 0; 536 sctp_ifnp->vrf = vrf; 537 atomic_add_int(&vrf->refcount, 1); 538 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 539 if (if_name != NULL) { 540 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 541 } else { 542 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 543 } 544 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 545 LIST_INIT(&sctp_ifnp->ifalist); 546 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 547 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 548 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 549 new_ifn_af = 1; 550 } 551 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 552 if (sctp_ifap) { 553 /* Hmm, it already exists? */ 554 if ((sctp_ifap->ifn_p) && 555 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 556 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 557 sctp_ifap->ifn_p->ifn_name, ifn_index, 558 (void *)sctp_ifap); 559 if (new_ifn_af) { 560 /* Remove the created one that we don't want */ 561 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 562 } 563 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 564 /* easy to solve, just switch back to active */ 565 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 566 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 567 sctp_ifap->ifn_p = sctp_ifnp; 568 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 569 } 570 exit_stage_left: 571 SCTP_IPI_ADDR_WUNLOCK(); 572 if (new_sctp_ifnp != NULL) { 573 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 574 } 575 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 576 return (sctp_ifap); 577 } else { 578 if (sctp_ifap->ifn_p) { 579 /* 580 * The last IFN gets the address, remove the 581 * old one 582 */ 583 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 584 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 585 sctp_ifap->ifn_p->ifn_index, if_name, 586 ifn_index); 587 /* remove the address from the old ifn */ 588 sctp_remove_ifa_from_ifn(sctp_ifap); 589 /* move the address over to the new ifn */ 590 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 591 goto exit_stage_left; 592 } else { 593 /* repair ifnp which was NULL ? */ 594 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 595 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 596 (void *)sctp_ifnp, (void *)sctp_ifap); 597 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 598 } 599 goto exit_stage_left; 600 } 601 } 602 sctp_ifap = new_sctp_ifap; 603 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 604 sctp_ifap->ifn_p = sctp_ifnp; 605 atomic_add_int(&sctp_ifnp->refcount, 1); 606 sctp_ifap->vrf_id = vrf_id; 607 sctp_ifap->ifa = ifa; 608 memcpy(&sctp_ifap->address, addr, addr->sa_len); 609 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 610 sctp_ifap->flags = ifa_flags; 611 /* Set scope */ 612 switch (sctp_ifap->address.sa.sa_family) { 613 #ifdef INET 614 case AF_INET: 615 { 616 struct sockaddr_in *sin; 617 618 sin = &sctp_ifap->address.sin; 619 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 620 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 621 sctp_ifap->src_is_loop = 1; 622 } 623 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 624 sctp_ifap->src_is_priv = 1; 625 } 626 sctp_ifnp->num_v4++; 627 if (new_ifn_af) 628 new_ifn_af = AF_INET; 629 break; 630 } 631 #endif 632 #ifdef INET6 633 case AF_INET6: 634 { 635 /* ok to use deprecated addresses? */ 636 struct sockaddr_in6 *sin6; 637 638 sin6 = &sctp_ifap->address.sin6; 639 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 640 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 641 sctp_ifap->src_is_loop = 1; 642 } 643 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 644 sctp_ifap->src_is_priv = 1; 645 } 646 sctp_ifnp->num_v6++; 647 if (new_ifn_af) 648 new_ifn_af = AF_INET6; 649 break; 650 } 651 #endif 652 default: 653 new_ifn_af = 0; 654 break; 655 } 656 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 657 658 if ((sctp_ifap->src_is_priv == 0) && 659 (sctp_ifap->src_is_loop == 0)) { 660 sctp_ifap->src_is_glob = 1; 661 } 662 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 663 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 664 sctp_ifap->refcount = 1; 665 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 666 sctp_ifnp->ifa_count++; 667 vrf->total_ifa_count++; 668 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 669 if (new_ifn_af) { 670 sctp_ifnp->registered_af = new_ifn_af; 671 } 672 SCTP_IPI_ADDR_WUNLOCK(); 673 if (new_sctp_ifnp != NULL) { 674 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 675 } 676 677 if (dynamic_add) { 678 /* 679 * Bump up the refcount so that when the timer completes it 680 * will drop back down. 681 */ 682 struct sctp_laddr *wi; 683 684 atomic_add_int(&sctp_ifap->refcount, 1); 685 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 686 if (wi == NULL) { 687 /* 688 * Gak, what can we do? We have lost an address 689 * change can you say HOSED? 690 */ 691 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 692 /* Opps, must decrement the count */ 693 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 694 if_name); 695 return (NULL); 696 } 697 SCTP_INCR_LADDR_COUNT(); 698 memset(wi, 0, sizeof(*wi)); 699 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 700 wi->ifa = sctp_ifap; 701 wi->action = SCTP_ADD_IP_ADDRESS; 702 703 SCTP_WQ_ADDR_LOCK(); 704 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 705 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 706 (struct sctp_inpcb *)NULL, 707 (struct sctp_tcb *)NULL, 708 (struct sctp_nets *)NULL); 709 SCTP_WQ_ADDR_UNLOCK(); 710 } else { 711 /* it's ready for use */ 712 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 713 } 714 return (sctp_ifap); 715 } 716 717 void 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 719 uint32_t ifn_index, const char *if_name) 720 { 721 struct sctp_vrf *vrf; 722 struct sctp_ifa *sctp_ifap = NULL; 723 724 SCTP_IPI_ADDR_WLOCK(); 725 vrf = sctp_find_vrf(vrf_id); 726 if (vrf == NULL) { 727 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 728 goto out_now; 729 } 730 731 #ifdef SCTP_DEBUG 732 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 733 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 734 #endif 735 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 736 if (sctp_ifap) { 737 /* Validate the delete */ 738 if (sctp_ifap->ifn_p) { 739 int valid = 0; 740 741 /*- 742 * The name has priority over the ifn_index 743 * if its given. 744 */ 745 if (if_name) { 746 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 747 /* They match its a correct delete */ 748 valid = 1; 749 } 750 } 751 if (!valid) { 752 /* last ditch check ifn_index */ 753 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 754 valid = 1; 755 } 756 } 757 if (!valid) { 758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 759 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 760 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 761 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 762 SCTP_IPI_ADDR_WUNLOCK(); 763 return; 764 } 765 } 766 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 767 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 768 /* 769 * We don't set the flag. This means that the structure will 770 * hang around in EP's that have bound specific to it until 771 * they close. This gives us TCP like behavior if someone 772 * removes an address (or for that matter adds it right 773 * back). 774 */ 775 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 776 vrf->total_ifa_count--; 777 LIST_REMOVE(sctp_ifap, next_bucket); 778 sctp_remove_ifa_from_ifn(sctp_ifap); 779 } 780 #ifdef SCTP_DEBUG 781 else { 782 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 783 ifn_index); 784 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 785 } 786 #endif 787 788 out_now: 789 SCTP_IPI_ADDR_WUNLOCK(); 790 if (sctp_ifap) { 791 struct sctp_laddr *wi; 792 793 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 794 if (wi == NULL) { 795 /* 796 * Gak, what can we do? We have lost an address 797 * change can you say HOSED? 798 */ 799 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 800 801 /* Oops, must decrement the count */ 802 sctp_free_ifa(sctp_ifap); 803 return; 804 } 805 SCTP_INCR_LADDR_COUNT(); 806 memset(wi, 0, sizeof(*wi)); 807 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 808 wi->ifa = sctp_ifap; 809 wi->action = SCTP_DEL_IP_ADDRESS; 810 SCTP_WQ_ADDR_LOCK(); 811 /* 812 * Should this really be a tailq? As it is we will process 813 * the newest first :-0 814 */ 815 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 816 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 817 (struct sctp_inpcb *)NULL, 818 (struct sctp_tcb *)NULL, 819 (struct sctp_nets *)NULL); 820 SCTP_WQ_ADDR_UNLOCK(); 821 } 822 return; 823 } 824 825 static int 826 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 827 { 828 int loopback_scope; 829 #if defined(INET) 830 int ipv4_local_scope, ipv4_addr_legal; 831 #endif 832 #if defined(INET6) 833 int local_scope, site_scope, ipv6_addr_legal; 834 #endif 835 struct sctp_vrf *vrf; 836 struct sctp_ifn *sctp_ifn; 837 struct sctp_ifa *sctp_ifa; 838 839 loopback_scope = stcb->asoc.scope.loopback_scope; 840 #if defined(INET) 841 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 842 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 843 #endif 844 #if defined(INET6) 845 local_scope = stcb->asoc.scope.local_scope; 846 site_scope = stcb->asoc.scope.site_scope; 847 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 848 #endif 849 850 SCTP_IPI_ADDR_RLOCK(); 851 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 852 if (vrf == NULL) { 853 /* no vrf, no addresses */ 854 SCTP_IPI_ADDR_RUNLOCK(); 855 return (0); 856 } 857 858 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 859 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 860 if ((loopback_scope == 0) && 861 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 862 continue; 863 } 864 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 865 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 866 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 867 /* 868 * We allow pending addresses, where 869 * we have sent an asconf-add to be 870 * considered valid. 871 */ 872 continue; 873 } 874 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 875 continue; 876 } 877 switch (sctp_ifa->address.sa.sa_family) { 878 #ifdef INET 879 case AF_INET: 880 if (ipv4_addr_legal) { 881 struct sockaddr_in *sin, 882 *rsin; 883 884 sin = &sctp_ifa->address.sin; 885 rsin = (struct sockaddr_in *)to; 886 if ((ipv4_local_scope == 0) && 887 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 888 continue; 889 } 890 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 891 &sin->sin_addr) != 0) { 892 continue; 893 } 894 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 895 SCTP_IPI_ADDR_RUNLOCK(); 896 return (1); 897 } 898 } 899 break; 900 #endif 901 #ifdef INET6 902 case AF_INET6: 903 if (ipv6_addr_legal) { 904 struct sockaddr_in6 *sin6, 905 *rsin6; 906 907 sin6 = &sctp_ifa->address.sin6; 908 rsin6 = (struct sockaddr_in6 *)to; 909 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 910 &sin6->sin6_addr) != 0) { 911 continue; 912 } 913 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 914 if (local_scope == 0) 915 continue; 916 if (sin6->sin6_scope_id == 0) { 917 if (sa6_recoverscope(sin6) != 0) 918 continue; 919 } 920 } 921 if ((site_scope == 0) && 922 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 923 continue; 924 } 925 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 926 SCTP_IPI_ADDR_RUNLOCK(); 927 return (1); 928 } 929 } 930 break; 931 #endif 932 default: 933 /* TSNH */ 934 break; 935 } 936 } 937 } 938 } else { 939 struct sctp_laddr *laddr; 940 941 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 942 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 943 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 944 continue; 945 } 946 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 947 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 948 /* 949 * We allow pending addresses, where we have 950 * sent an asconf-add to be considered 951 * valid. 952 */ 953 continue; 954 } 955 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 956 continue; 957 } 958 switch (to->sa_family) { 959 #ifdef INET 960 case AF_INET: 961 { 962 struct sockaddr_in *sin, *rsin; 963 964 sin = &laddr->ifa->address.sin; 965 rsin = (struct sockaddr_in *)to; 966 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 967 SCTP_IPI_ADDR_RUNLOCK(); 968 return (1); 969 } 970 break; 971 } 972 #endif 973 #ifdef INET6 974 case AF_INET6: 975 { 976 struct sockaddr_in6 *sin6, *rsin6; 977 978 sin6 = &laddr->ifa->address.sin6; 979 rsin6 = (struct sockaddr_in6 *)to; 980 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 981 SCTP_IPI_ADDR_RUNLOCK(); 982 return (1); 983 } 984 break; 985 } 986 987 #endif 988 default: 989 /* TSNH */ 990 break; 991 } 992 } 993 } 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (0); 996 } 997 998 static struct sctp_tcb * 999 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1000 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1001 { 1002 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1003 /* 1004 * If we support the TCP model, then we must now dig through to see 1005 * if we can find our endpoint in the list of tcp ep's. 1006 */ 1007 uint16_t lport, rport; 1008 struct sctppcbhead *ephead; 1009 struct sctp_inpcb *inp; 1010 struct sctp_laddr *laddr; 1011 struct sctp_tcb *stcb; 1012 struct sctp_nets *net; 1013 1014 if ((to == NULL) || (from == NULL)) { 1015 return (NULL); 1016 } 1017 1018 switch (to->sa_family) { 1019 #ifdef INET 1020 case AF_INET: 1021 if (from->sa_family == AF_INET) { 1022 lport = ((struct sockaddr_in *)to)->sin_port; 1023 rport = ((struct sockaddr_in *)from)->sin_port; 1024 } else { 1025 return (NULL); 1026 } 1027 break; 1028 #endif 1029 #ifdef INET6 1030 case AF_INET6: 1031 if (from->sa_family == AF_INET6) { 1032 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1033 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1034 } else { 1035 return (NULL); 1036 } 1037 break; 1038 #endif 1039 default: 1040 return (NULL); 1041 } 1042 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1043 /* 1044 * Ok now for each of the guys in this bucket we must look and see: 1045 * - Does the remote port match. - Does there single association's 1046 * addresses match this address (to). If so we update p_ep to point 1047 * to this ep and return the tcb from it. 1048 */ 1049 LIST_FOREACH(inp, ephead, sctp_hash) { 1050 SCTP_INP_RLOCK(inp); 1051 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1052 SCTP_INP_RUNLOCK(inp); 1053 continue; 1054 } 1055 if (lport != inp->sctp_lport) { 1056 SCTP_INP_RUNLOCK(inp); 1057 continue; 1058 } 1059 switch (to->sa_family) { 1060 #ifdef INET 1061 case AF_INET: 1062 { 1063 struct sockaddr_in *sin; 1064 1065 sin = (struct sockaddr_in *)to; 1066 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1067 &sin->sin_addr) != 0) { 1068 SCTP_INP_RUNLOCK(inp); 1069 continue; 1070 } 1071 break; 1072 } 1073 #endif 1074 #ifdef INET6 1075 case AF_INET6: 1076 { 1077 struct sockaddr_in6 *sin6; 1078 1079 sin6 = (struct sockaddr_in6 *)to; 1080 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1081 &sin6->sin6_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 default: 1089 SCTP_INP_RUNLOCK(inp); 1090 continue; 1091 } 1092 if (inp->def_vrf_id != vrf_id) { 1093 SCTP_INP_RUNLOCK(inp); 1094 continue; 1095 } 1096 /* check to see if the ep has one of the addresses */ 1097 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1098 /* We are NOT bound all, so look further */ 1099 int match = 0; 1100 1101 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1102 if (laddr->ifa == NULL) { 1103 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1104 continue; 1105 } 1106 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1107 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1108 continue; 1109 } 1110 if (laddr->ifa->address.sa.sa_family == 1111 to->sa_family) { 1112 /* see if it matches */ 1113 #ifdef INET 1114 if (from->sa_family == AF_INET) { 1115 struct sockaddr_in *intf_addr, 1116 *sin; 1117 1118 intf_addr = &laddr->ifa->address.sin; 1119 sin = (struct sockaddr_in *)to; 1120 if (sin->sin_addr.s_addr == 1121 intf_addr->sin_addr.s_addr) { 1122 match = 1; 1123 break; 1124 } 1125 } 1126 #endif 1127 #ifdef INET6 1128 if (from->sa_family == AF_INET6) { 1129 struct sockaddr_in6 *intf_addr6; 1130 struct sockaddr_in6 *sin6; 1131 1132 sin6 = (struct sockaddr_in6 *) 1133 to; 1134 intf_addr6 = &laddr->ifa->address.sin6; 1135 1136 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1137 intf_addr6)) { 1138 match = 1; 1139 break; 1140 } 1141 } 1142 #endif 1143 } 1144 } 1145 if (match == 0) { 1146 /* This endpoint does not have this address */ 1147 SCTP_INP_RUNLOCK(inp); 1148 continue; 1149 } 1150 } 1151 /* 1152 * Ok if we hit here the ep has the address, does it hold 1153 * the tcb? 1154 */ 1155 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1156 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1157 if (stcb == NULL) { 1158 SCTP_INP_RUNLOCK(inp); 1159 continue; 1160 } 1161 SCTP_TCB_LOCK(stcb); 1162 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1163 SCTP_TCB_UNLOCK(stcb); 1164 SCTP_INP_RUNLOCK(inp); 1165 continue; 1166 } 1167 if (stcb->rport != rport) { 1168 /* remote port does not match. */ 1169 SCTP_TCB_UNLOCK(stcb); 1170 SCTP_INP_RUNLOCK(inp); 1171 continue; 1172 } 1173 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1174 SCTP_TCB_UNLOCK(stcb); 1175 SCTP_INP_RUNLOCK(inp); 1176 continue; 1177 } 1178 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1179 SCTP_TCB_UNLOCK(stcb); 1180 SCTP_INP_RUNLOCK(inp); 1181 continue; 1182 } 1183 /* Does this TCB have a matching address? */ 1184 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1185 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1186 /* not the same family, can't be a match */ 1187 continue; 1188 } 1189 switch (from->sa_family) { 1190 #ifdef INET 1191 case AF_INET: 1192 { 1193 struct sockaddr_in *sin, *rsin; 1194 1195 sin = (struct sockaddr_in *)&net->ro._l_addr; 1196 rsin = (struct sockaddr_in *)from; 1197 if (sin->sin_addr.s_addr == 1198 rsin->sin_addr.s_addr) { 1199 /* found it */ 1200 if (netp != NULL) { 1201 *netp = net; 1202 } 1203 /* 1204 * Update the endpoint 1205 * pointer 1206 */ 1207 *inp_p = inp; 1208 SCTP_INP_RUNLOCK(inp); 1209 return (stcb); 1210 } 1211 break; 1212 } 1213 #endif 1214 #ifdef INET6 1215 case AF_INET6: 1216 { 1217 struct sockaddr_in6 *sin6, *rsin6; 1218 1219 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1220 rsin6 = (struct sockaddr_in6 *)from; 1221 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1222 rsin6)) { 1223 /* found it */ 1224 if (netp != NULL) { 1225 *netp = net; 1226 } 1227 /* 1228 * Update the endpoint 1229 * pointer 1230 */ 1231 *inp_p = inp; 1232 SCTP_INP_RUNLOCK(inp); 1233 return (stcb); 1234 } 1235 break; 1236 } 1237 #endif 1238 default: 1239 /* TSNH */ 1240 break; 1241 } 1242 } 1243 SCTP_TCB_UNLOCK(stcb); 1244 SCTP_INP_RUNLOCK(inp); 1245 } 1246 return (NULL); 1247 } 1248 1249 /* 1250 * rules for use 1251 * 1252 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1253 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1254 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1255 * NULL. 1256 */ 1257 1258 struct sctp_tcb * 1259 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1260 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1261 { 1262 struct sctpasochead *head; 1263 struct sctp_inpcb *inp; 1264 struct sctp_tcb *stcb = NULL; 1265 struct sctp_nets *net; 1266 uint16_t rport; 1267 1268 inp = *inp_p; 1269 switch (remote->sa_family) { 1270 #ifdef INET 1271 case AF_INET: 1272 rport = (((struct sockaddr_in *)remote)->sin_port); 1273 break; 1274 #endif 1275 #ifdef INET6 1276 case AF_INET6: 1277 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1278 break; 1279 #endif 1280 default: 1281 return (NULL); 1282 } 1283 if (locked_tcb) { 1284 /* 1285 * UN-lock so we can do proper locking here this occurs when 1286 * called from load_addresses_from_init. 1287 */ 1288 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1289 SCTP_TCB_UNLOCK(locked_tcb); 1290 } 1291 SCTP_INP_INFO_RLOCK(); 1292 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1293 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1294 /*- 1295 * Now either this guy is our listener or it's the 1296 * connector. If it is the one that issued the connect, then 1297 * it's only chance is to be the first TCB in the list. If 1298 * it is the acceptor, then do the special_lookup to hash 1299 * and find the real inp. 1300 */ 1301 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1302 /* to is peer addr, from is my addr */ 1303 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1304 netp, inp->def_vrf_id); 1305 if ((stcb != NULL) && (locked_tcb == NULL)) { 1306 /* we have a locked tcb, lower refcount */ 1307 SCTP_INP_DECR_REF(inp); 1308 } 1309 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1310 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1311 SCTP_TCB_LOCK(locked_tcb); 1312 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1313 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1314 } 1315 SCTP_INP_INFO_RUNLOCK(); 1316 return (stcb); 1317 } else { 1318 SCTP_INP_WLOCK(inp); 1319 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1320 goto null_return; 1321 } 1322 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1323 if (stcb == NULL) { 1324 goto null_return; 1325 } 1326 SCTP_TCB_LOCK(stcb); 1327 1328 if (stcb->rport != rport) { 1329 /* remote port does not match. */ 1330 SCTP_TCB_UNLOCK(stcb); 1331 goto null_return; 1332 } 1333 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1334 SCTP_TCB_UNLOCK(stcb); 1335 goto null_return; 1336 } 1337 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1338 SCTP_TCB_UNLOCK(stcb); 1339 goto null_return; 1340 } 1341 /* now look at the list of remote addresses */ 1342 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1343 #ifdef INVARIANTS 1344 if (net == (TAILQ_NEXT(net, sctp_next))) { 1345 panic("Corrupt net list"); 1346 } 1347 #endif 1348 if (net->ro._l_addr.sa.sa_family != 1349 remote->sa_family) { 1350 /* not the same family */ 1351 continue; 1352 } 1353 switch (remote->sa_family) { 1354 #ifdef INET 1355 case AF_INET: 1356 { 1357 struct sockaddr_in *sin, 1358 *rsin; 1359 1360 sin = (struct sockaddr_in *) 1361 &net->ro._l_addr; 1362 rsin = (struct sockaddr_in *)remote; 1363 if (sin->sin_addr.s_addr == 1364 rsin->sin_addr.s_addr) { 1365 /* found it */ 1366 if (netp != NULL) { 1367 *netp = net; 1368 } 1369 if (locked_tcb == NULL) { 1370 SCTP_INP_DECR_REF(inp); 1371 } else if (locked_tcb != stcb) { 1372 SCTP_TCB_LOCK(locked_tcb); 1373 } 1374 if (locked_tcb) { 1375 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1376 } 1377 1378 SCTP_INP_WUNLOCK(inp); 1379 SCTP_INP_INFO_RUNLOCK(); 1380 return (stcb); 1381 } 1382 break; 1383 } 1384 #endif 1385 #ifdef INET6 1386 case AF_INET6: 1387 { 1388 struct sockaddr_in6 *sin6, 1389 *rsin6; 1390 1391 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1392 rsin6 = (struct sockaddr_in6 *)remote; 1393 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1394 rsin6)) { 1395 /* found it */ 1396 if (netp != NULL) { 1397 *netp = net; 1398 } 1399 if (locked_tcb == NULL) { 1400 SCTP_INP_DECR_REF(inp); 1401 } else if (locked_tcb != stcb) { 1402 SCTP_TCB_LOCK(locked_tcb); 1403 } 1404 if (locked_tcb) { 1405 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1406 } 1407 SCTP_INP_WUNLOCK(inp); 1408 SCTP_INP_INFO_RUNLOCK(); 1409 return (stcb); 1410 } 1411 break; 1412 } 1413 #endif 1414 default: 1415 /* TSNH */ 1416 break; 1417 } 1418 } 1419 SCTP_TCB_UNLOCK(stcb); 1420 } 1421 } else { 1422 SCTP_INP_WLOCK(inp); 1423 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1424 goto null_return; 1425 } 1426 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1427 inp->sctp_hashmark)]; 1428 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1429 if (stcb->rport != rport) { 1430 /* remote port does not match */ 1431 continue; 1432 } 1433 SCTP_TCB_LOCK(stcb); 1434 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1435 SCTP_TCB_UNLOCK(stcb); 1436 continue; 1437 } 1438 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1439 SCTP_TCB_UNLOCK(stcb); 1440 continue; 1441 } 1442 /* now look at the list of remote addresses */ 1443 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1444 #ifdef INVARIANTS 1445 if (net == (TAILQ_NEXT(net, sctp_next))) { 1446 panic("Corrupt net list"); 1447 } 1448 #endif 1449 if (net->ro._l_addr.sa.sa_family != 1450 remote->sa_family) { 1451 /* not the same family */ 1452 continue; 1453 } 1454 switch (remote->sa_family) { 1455 #ifdef INET 1456 case AF_INET: 1457 { 1458 struct sockaddr_in *sin, 1459 *rsin; 1460 1461 sin = (struct sockaddr_in *) 1462 &net->ro._l_addr; 1463 rsin = (struct sockaddr_in *)remote; 1464 if (sin->sin_addr.s_addr == 1465 rsin->sin_addr.s_addr) { 1466 /* found it */ 1467 if (netp != NULL) { 1468 *netp = net; 1469 } 1470 if (locked_tcb == NULL) { 1471 SCTP_INP_DECR_REF(inp); 1472 } else if (locked_tcb != stcb) { 1473 SCTP_TCB_LOCK(locked_tcb); 1474 } 1475 if (locked_tcb) { 1476 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1477 } 1478 SCTP_INP_WUNLOCK(inp); 1479 SCTP_INP_INFO_RUNLOCK(); 1480 return (stcb); 1481 } 1482 break; 1483 } 1484 #endif 1485 #ifdef INET6 1486 case AF_INET6: 1487 { 1488 struct sockaddr_in6 *sin6, 1489 *rsin6; 1490 1491 sin6 = (struct sockaddr_in6 *) 1492 &net->ro._l_addr; 1493 rsin6 = (struct sockaddr_in6 *)remote; 1494 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1495 rsin6)) { 1496 /* found it */ 1497 if (netp != NULL) { 1498 *netp = net; 1499 } 1500 if (locked_tcb == NULL) { 1501 SCTP_INP_DECR_REF(inp); 1502 } else if (locked_tcb != stcb) { 1503 SCTP_TCB_LOCK(locked_tcb); 1504 } 1505 if (locked_tcb) { 1506 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1507 } 1508 SCTP_INP_WUNLOCK(inp); 1509 SCTP_INP_INFO_RUNLOCK(); 1510 return (stcb); 1511 } 1512 break; 1513 } 1514 #endif 1515 default: 1516 /* TSNH */ 1517 break; 1518 } 1519 } 1520 SCTP_TCB_UNLOCK(stcb); 1521 } 1522 } 1523 null_return: 1524 /* clean up for returning null */ 1525 if (locked_tcb) { 1526 SCTP_TCB_LOCK(locked_tcb); 1527 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1528 } 1529 SCTP_INP_WUNLOCK(inp); 1530 SCTP_INP_INFO_RUNLOCK(); 1531 /* not found */ 1532 return (NULL); 1533 } 1534 1535 /* 1536 * Find an association for a specific endpoint using the association id given 1537 * out in the COMM_UP notification 1538 */ 1539 struct sctp_tcb * 1540 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1541 { 1542 /* 1543 * Use my the assoc_id to find a endpoint 1544 */ 1545 struct sctpasochead *head; 1546 struct sctp_tcb *stcb; 1547 uint32_t id; 1548 1549 if (inp == NULL) { 1550 SCTP_PRINTF("TSNH ep_associd\n"); 1551 return (NULL); 1552 } 1553 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1554 SCTP_PRINTF("TSNH ep_associd0\n"); 1555 return (NULL); 1556 } 1557 id = (uint32_t)asoc_id; 1558 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1559 if (head == NULL) { 1560 /* invalid id TSNH */ 1561 SCTP_PRINTF("TSNH ep_associd1\n"); 1562 return (NULL); 1563 } 1564 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1565 if (stcb->asoc.assoc_id == id) { 1566 if (inp != stcb->sctp_ep) { 1567 /* 1568 * some other guy has the same id active (id 1569 * collision ??). 1570 */ 1571 SCTP_PRINTF("TSNH ep_associd2\n"); 1572 continue; 1573 } 1574 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1575 continue; 1576 } 1577 if (want_lock) { 1578 SCTP_TCB_LOCK(stcb); 1579 } 1580 return (stcb); 1581 } 1582 } 1583 return (NULL); 1584 } 1585 1586 struct sctp_tcb * 1587 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1588 { 1589 struct sctp_tcb *stcb; 1590 1591 SCTP_INP_RLOCK(inp); 1592 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1593 SCTP_INP_RUNLOCK(inp); 1594 return (stcb); 1595 } 1596 1597 /* 1598 * Endpoint probe expects that the INP_INFO is locked. 1599 */ 1600 static struct sctp_inpcb * 1601 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1602 uint16_t lport, uint32_t vrf_id) 1603 { 1604 struct sctp_inpcb *inp; 1605 struct sctp_laddr *laddr; 1606 #ifdef INET 1607 struct sockaddr_in *sin; 1608 #endif 1609 #ifdef INET6 1610 struct sockaddr_in6 *sin6; 1611 struct sockaddr_in6 *intf_addr6; 1612 #endif 1613 int fnd; 1614 1615 #ifdef INET 1616 sin = NULL; 1617 #endif 1618 #ifdef INET6 1619 sin6 = NULL; 1620 #endif 1621 switch (nam->sa_family) { 1622 #ifdef INET 1623 case AF_INET: 1624 sin = (struct sockaddr_in *)nam; 1625 break; 1626 #endif 1627 #ifdef INET6 1628 case AF_INET6: 1629 sin6 = (struct sockaddr_in6 *)nam; 1630 break; 1631 #endif 1632 default: 1633 /* unsupported family */ 1634 return (NULL); 1635 } 1636 1637 if (head == NULL) 1638 return (NULL); 1639 1640 LIST_FOREACH(inp, head, sctp_hash) { 1641 SCTP_INP_RLOCK(inp); 1642 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1643 SCTP_INP_RUNLOCK(inp); 1644 continue; 1645 } 1646 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1647 (inp->sctp_lport == lport)) { 1648 /* got it */ 1649 switch (nam->sa_family) { 1650 #ifdef INET 1651 case AF_INET: 1652 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1653 SCTP_IPV6_V6ONLY(inp)) { 1654 /* 1655 * IPv4 on a IPv6 socket with ONLY 1656 * IPv6 set 1657 */ 1658 SCTP_INP_RUNLOCK(inp); 1659 continue; 1660 } 1661 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1662 &sin->sin_addr) != 0) { 1663 SCTP_INP_RUNLOCK(inp); 1664 continue; 1665 } 1666 break; 1667 #endif 1668 #ifdef INET6 1669 case AF_INET6: 1670 /* 1671 * A V6 address and the endpoint is NOT 1672 * bound V6 1673 */ 1674 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1675 SCTP_INP_RUNLOCK(inp); 1676 continue; 1677 } 1678 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1679 &sin6->sin6_addr) != 0) { 1680 SCTP_INP_RUNLOCK(inp); 1681 continue; 1682 } 1683 break; 1684 #endif 1685 default: 1686 break; 1687 } 1688 /* does a VRF id match? */ 1689 fnd = 0; 1690 if (inp->def_vrf_id == vrf_id) 1691 fnd = 1; 1692 1693 SCTP_INP_RUNLOCK(inp); 1694 if (!fnd) 1695 continue; 1696 return (inp); 1697 } 1698 SCTP_INP_RUNLOCK(inp); 1699 } 1700 switch (nam->sa_family) { 1701 #ifdef INET 1702 case AF_INET: 1703 if (sin->sin_addr.s_addr == INADDR_ANY) { 1704 /* Can't hunt for one that has no address specified */ 1705 return (NULL); 1706 } 1707 break; 1708 #endif 1709 #ifdef INET6 1710 case AF_INET6: 1711 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1712 /* Can't hunt for one that has no address specified */ 1713 return (NULL); 1714 } 1715 break; 1716 #endif 1717 default: 1718 break; 1719 } 1720 /* 1721 * ok, not bound to all so see if we can find a EP bound to this 1722 * address. 1723 */ 1724 LIST_FOREACH(inp, head, sctp_hash) { 1725 SCTP_INP_RLOCK(inp); 1726 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1727 SCTP_INP_RUNLOCK(inp); 1728 continue; 1729 } 1730 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1731 SCTP_INP_RUNLOCK(inp); 1732 continue; 1733 } 1734 /* 1735 * Ok this could be a likely candidate, look at all of its 1736 * addresses 1737 */ 1738 if (inp->sctp_lport != lport) { 1739 SCTP_INP_RUNLOCK(inp); 1740 continue; 1741 } 1742 /* does a VRF id match? */ 1743 fnd = 0; 1744 if (inp->def_vrf_id == vrf_id) 1745 fnd = 1; 1746 1747 if (!fnd) { 1748 SCTP_INP_RUNLOCK(inp); 1749 continue; 1750 } 1751 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1752 if (laddr->ifa == NULL) { 1753 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1754 __func__); 1755 continue; 1756 } 1757 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1758 (void *)laddr->ifa); 1759 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1760 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1761 continue; 1762 } 1763 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1764 /* possible, see if it matches */ 1765 switch (nam->sa_family) { 1766 #ifdef INET 1767 case AF_INET: 1768 if (sin->sin_addr.s_addr == 1769 laddr->ifa->address.sin.sin_addr.s_addr) { 1770 SCTP_INP_RUNLOCK(inp); 1771 return (inp); 1772 } 1773 break; 1774 #endif 1775 #ifdef INET6 1776 case AF_INET6: 1777 intf_addr6 = &laddr->ifa->address.sin6; 1778 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1779 intf_addr6)) { 1780 SCTP_INP_RUNLOCK(inp); 1781 return (inp); 1782 } 1783 break; 1784 #endif 1785 } 1786 } 1787 } 1788 SCTP_INP_RUNLOCK(inp); 1789 } 1790 return (NULL); 1791 } 1792 1793 static struct sctp_inpcb * 1794 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1795 { 1796 struct sctppcbhead *head; 1797 struct sctp_inpcb *t_inp; 1798 int fnd; 1799 1800 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1801 SCTP_BASE_INFO(hashmark))]; 1802 LIST_FOREACH(t_inp, head, sctp_hash) { 1803 if (t_inp->sctp_lport != lport) { 1804 continue; 1805 } 1806 /* is it in the VRF in question */ 1807 fnd = 0; 1808 if (t_inp->def_vrf_id == vrf_id) 1809 fnd = 1; 1810 if (!fnd) 1811 continue; 1812 1813 /* This one is in use. */ 1814 /* check the v6/v4 binding issue */ 1815 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1816 SCTP_IPV6_V6ONLY(t_inp)) { 1817 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1818 /* collision in V6 space */ 1819 return (t_inp); 1820 } else { 1821 /* inp is BOUND_V4 no conflict */ 1822 continue; 1823 } 1824 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1825 /* t_inp is bound v4 and v6, conflict always */ 1826 return (t_inp); 1827 } else { 1828 /* t_inp is bound only V4 */ 1829 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1830 SCTP_IPV6_V6ONLY(inp)) { 1831 /* no conflict */ 1832 continue; 1833 } 1834 /* else fall through to conflict */ 1835 } 1836 return (t_inp); 1837 } 1838 return (NULL); 1839 } 1840 1841 int 1842 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1843 { 1844 /* For 1-2-1 with port reuse */ 1845 struct sctppcbhead *head; 1846 struct sctp_inpcb *tinp, *ninp; 1847 1848 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1849 /* only works with port reuse on */ 1850 return (-1); 1851 } 1852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1853 return (0); 1854 } 1855 SCTP_INP_RUNLOCK(inp); 1856 SCTP_INP_INFO_WLOCK(); 1857 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1858 SCTP_BASE_INFO(hashmark))]; 1859 /* Kick out all non-listeners to the TCP hash */ 1860 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1861 if (tinp->sctp_lport != inp->sctp_lport) { 1862 continue; 1863 } 1864 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1865 continue; 1866 } 1867 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1868 continue; 1869 } 1870 if (SCTP_IS_LISTENING(tinp)) { 1871 continue; 1872 } 1873 SCTP_INP_WLOCK(tinp); 1874 LIST_REMOVE(tinp, sctp_hash); 1875 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1876 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1877 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1878 SCTP_INP_WUNLOCK(tinp); 1879 } 1880 SCTP_INP_WLOCK(inp); 1881 /* Pull from where he was */ 1882 LIST_REMOVE(inp, sctp_hash); 1883 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1884 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1885 LIST_INSERT_HEAD(head, inp, sctp_hash); 1886 SCTP_INP_WUNLOCK(inp); 1887 SCTP_INP_RLOCK(inp); 1888 SCTP_INP_INFO_WUNLOCK(); 1889 return (0); 1890 } 1891 1892 struct sctp_inpcb * 1893 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1894 uint32_t vrf_id) 1895 { 1896 /* 1897 * First we check the hash table to see if someone has this port 1898 * bound with just the port. 1899 */ 1900 struct sctp_inpcb *inp; 1901 struct sctppcbhead *head; 1902 int lport; 1903 unsigned int i; 1904 #ifdef INET 1905 struct sockaddr_in *sin; 1906 #endif 1907 #ifdef INET6 1908 struct sockaddr_in6 *sin6; 1909 #endif 1910 1911 switch (nam->sa_family) { 1912 #ifdef INET 1913 case AF_INET: 1914 sin = (struct sockaddr_in *)nam; 1915 lport = sin->sin_port; 1916 break; 1917 #endif 1918 #ifdef INET6 1919 case AF_INET6: 1920 sin6 = (struct sockaddr_in6 *)nam; 1921 lport = sin6->sin6_port; 1922 break; 1923 #endif 1924 default: 1925 return (NULL); 1926 } 1927 /* 1928 * I could cheat here and just cast to one of the types but we will 1929 * do it right. It also provides the check against an Unsupported 1930 * type too. 1931 */ 1932 /* Find the head of the ALLADDR chain */ 1933 if (have_lock == 0) { 1934 SCTP_INP_INFO_RLOCK(); 1935 } 1936 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1937 SCTP_BASE_INFO(hashmark))]; 1938 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1939 1940 /* 1941 * If the TCP model exists it could be that the main listening 1942 * endpoint is gone but there still exists a connected socket for 1943 * this guy. If so we can return the first one that we find. This 1944 * may NOT be the correct one so the caller should be wary on the 1945 * returned INP. Currently the only caller that sets find_tcp_pool 1946 * is in bindx where we are verifying that a user CAN bind the 1947 * address. He either has bound it already, or someone else has, or 1948 * its open to bind, so this is good enough. 1949 */ 1950 if (inp == NULL && find_tcp_pool) { 1951 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1952 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1953 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1954 if (inp) { 1955 break; 1956 } 1957 } 1958 } 1959 if (inp) { 1960 SCTP_INP_INCR_REF(inp); 1961 } 1962 if (have_lock == 0) { 1963 SCTP_INP_INFO_RUNLOCK(); 1964 } 1965 return (inp); 1966 } 1967 1968 /* 1969 * Find an association for an endpoint with the pointer to whom you want to 1970 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1971 * need to change the *to to some other struct like a mbuf... 1972 */ 1973 struct sctp_tcb * 1974 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1975 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1976 uint32_t vrf_id) 1977 { 1978 struct sctp_inpcb *inp = NULL; 1979 struct sctp_tcb *stcb; 1980 1981 SCTP_INP_INFO_RLOCK(); 1982 if (find_tcp_pool) { 1983 if (inp_p != NULL) { 1984 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1985 vrf_id); 1986 } else { 1987 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1988 vrf_id); 1989 } 1990 if (stcb != NULL) { 1991 SCTP_INP_INFO_RUNLOCK(); 1992 return (stcb); 1993 } 1994 } 1995 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1996 if (inp_p != NULL) { 1997 *inp_p = inp; 1998 } 1999 SCTP_INP_INFO_RUNLOCK(); 2000 if (inp == NULL) { 2001 return (NULL); 2002 } 2003 /* 2004 * ok, we have an endpoint, now lets find the assoc for it (if any) 2005 * we now place the source address or from in the to of the find 2006 * endpoint call. Since in reality this chain is used from the 2007 * inbound packet side. 2008 */ 2009 if (inp_p != NULL) { 2010 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2011 NULL); 2012 } else { 2013 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2014 NULL); 2015 } 2016 return (stcb); 2017 } 2018 2019 /* 2020 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2021 * find all addresses that the sender has specified in any address list. Each 2022 * address will be used to lookup the TCB and see if one exits. 2023 */ 2024 static struct sctp_tcb * 2025 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2026 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2027 struct sockaddr *dst) 2028 { 2029 struct sctp_paramhdr *phdr, param_buf; 2030 #if defined(INET) || defined(INET6) 2031 struct sctp_tcb *stcb; 2032 uint16_t ptype; 2033 #endif 2034 uint16_t plen; 2035 #ifdef INET 2036 struct sockaddr_in sin4; 2037 #endif 2038 #ifdef INET6 2039 struct sockaddr_in6 sin6; 2040 #endif 2041 2042 #ifdef INET 2043 memset(&sin4, 0, sizeof(sin4)); 2044 sin4.sin_len = sizeof(sin4); 2045 sin4.sin_family = AF_INET; 2046 sin4.sin_port = sh->src_port; 2047 #endif 2048 #ifdef INET6 2049 memset(&sin6, 0, sizeof(sin6)); 2050 sin6.sin6_len = sizeof(sin6); 2051 sin6.sin6_family = AF_INET6; 2052 sin6.sin6_port = sh->src_port; 2053 #endif 2054 2055 offset += sizeof(struct sctp_init_chunk); 2056 2057 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2058 while (phdr != NULL) { 2059 /* now we must see if we want the parameter */ 2060 #if defined(INET) || defined(INET6) 2061 ptype = ntohs(phdr->param_type); 2062 #endif 2063 plen = ntohs(phdr->param_length); 2064 if (plen == 0) { 2065 break; 2066 } 2067 #ifdef INET 2068 if (ptype == SCTP_IPV4_ADDRESS && 2069 plen == sizeof(struct sctp_ipv4addr_param)) { 2070 /* Get the rest of the address */ 2071 struct sctp_ipv4addr_param ip4_param, *p4; 2072 2073 phdr = sctp_get_next_param(m, offset, 2074 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2075 if (phdr == NULL) { 2076 return (NULL); 2077 } 2078 p4 = (struct sctp_ipv4addr_param *)phdr; 2079 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2080 /* look it up */ 2081 stcb = sctp_findassociation_ep_addr(inp_p, 2082 (struct sockaddr *)&sin4, netp, dst, NULL); 2083 if (stcb != NULL) { 2084 return (stcb); 2085 } 2086 } 2087 #endif 2088 #ifdef INET6 2089 if (ptype == SCTP_IPV6_ADDRESS && 2090 plen == sizeof(struct sctp_ipv6addr_param)) { 2091 /* Get the rest of the address */ 2092 struct sctp_ipv6addr_param ip6_param, *p6; 2093 2094 phdr = sctp_get_next_param(m, offset, 2095 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2096 if (phdr == NULL) { 2097 return (NULL); 2098 } 2099 p6 = (struct sctp_ipv6addr_param *)phdr; 2100 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2101 /* look it up */ 2102 stcb = sctp_findassociation_ep_addr(inp_p, 2103 (struct sockaddr *)&sin6, netp, dst, NULL); 2104 if (stcb != NULL) { 2105 return (stcb); 2106 } 2107 } 2108 #endif 2109 offset += SCTP_SIZE32(plen); 2110 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2111 sizeof(param_buf)); 2112 } 2113 return (NULL); 2114 } 2115 2116 static struct sctp_tcb * 2117 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2118 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2119 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2120 { 2121 /* 2122 * Use my vtag to hash. If we find it we then verify the source addr 2123 * is in the assoc. If all goes well we save a bit on rec of a 2124 * packet. 2125 */ 2126 struct sctpasochead *head; 2127 struct sctp_nets *net; 2128 struct sctp_tcb *stcb; 2129 2130 SCTP_INP_INFO_RLOCK(); 2131 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2132 SCTP_BASE_INFO(hashasocmark))]; 2133 LIST_FOREACH(stcb, head, sctp_asocs) { 2134 SCTP_INP_RLOCK(stcb->sctp_ep); 2135 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2136 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2137 continue; 2138 } 2139 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2140 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2141 continue; 2142 } 2143 SCTP_TCB_LOCK(stcb); 2144 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2145 if (stcb->asoc.my_vtag == vtag) { 2146 /* candidate */ 2147 if (stcb->rport != rport) { 2148 SCTP_TCB_UNLOCK(stcb); 2149 continue; 2150 } 2151 if (stcb->sctp_ep->sctp_lport != lport) { 2152 SCTP_TCB_UNLOCK(stcb); 2153 continue; 2154 } 2155 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2156 SCTP_TCB_UNLOCK(stcb); 2157 continue; 2158 } 2159 /* RRS:Need toaddr check here */ 2160 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2161 /* Endpoint does not own this address */ 2162 SCTP_TCB_UNLOCK(stcb); 2163 continue; 2164 } 2165 if (remote_tag) { 2166 /* 2167 * If we have both vtags that's all we match 2168 * on 2169 */ 2170 if (stcb->asoc.peer_vtag == remote_tag) { 2171 /* 2172 * If both tags match we consider it 2173 * conclusive and check NO 2174 * source/destination addresses 2175 */ 2176 goto conclusive; 2177 } 2178 } 2179 if (skip_src_check) { 2180 conclusive: 2181 if (from) { 2182 *netp = sctp_findnet(stcb, from); 2183 } else { 2184 *netp = NULL; /* unknown */ 2185 } 2186 if (inp_p) 2187 *inp_p = stcb->sctp_ep; 2188 SCTP_INP_INFO_RUNLOCK(); 2189 return (stcb); 2190 } 2191 net = sctp_findnet(stcb, from); 2192 if (net) { 2193 /* yep its him. */ 2194 *netp = net; 2195 SCTP_STAT_INCR(sctps_vtagexpress); 2196 *inp_p = stcb->sctp_ep; 2197 SCTP_INP_INFO_RUNLOCK(); 2198 return (stcb); 2199 } else { 2200 /* 2201 * not him, this should only happen in rare 2202 * cases so I peg it. 2203 */ 2204 SCTP_STAT_INCR(sctps_vtagbogus); 2205 } 2206 } 2207 SCTP_TCB_UNLOCK(stcb); 2208 } 2209 SCTP_INP_INFO_RUNLOCK(); 2210 return (NULL); 2211 } 2212 2213 /* 2214 * Find an association with the pointer to the inbound IP packet. This can be 2215 * a IPv4 or IPv6 packet. 2216 */ 2217 struct sctp_tcb * 2218 sctp_findassociation_addr(struct mbuf *m, int offset, 2219 struct sockaddr *src, struct sockaddr *dst, 2220 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2221 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2222 { 2223 struct sctp_tcb *stcb; 2224 struct sctp_inpcb *inp; 2225 2226 if (sh->v_tag) { 2227 /* we only go down this path if vtag is non-zero */ 2228 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2229 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2230 if (stcb) { 2231 return (stcb); 2232 } 2233 } 2234 2235 if (inp_p) { 2236 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2237 1, vrf_id); 2238 inp = *inp_p; 2239 } else { 2240 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2241 1, vrf_id); 2242 } 2243 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2244 if (stcb == NULL && inp) { 2245 /* Found a EP but not this address */ 2246 if ((ch->chunk_type == SCTP_INITIATION) || 2247 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2248 /*- 2249 * special hook, we do NOT return linp or an 2250 * association that is linked to an existing 2251 * association that is under the TCP pool (i.e. no 2252 * listener exists). The endpoint finding routine 2253 * will always find a listener before examining the 2254 * TCP pool. 2255 */ 2256 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2257 if (inp_p) { 2258 *inp_p = NULL; 2259 } 2260 return (NULL); 2261 } 2262 stcb = sctp_findassociation_special_addr(m, 2263 offset, sh, &inp, netp, dst); 2264 if (inp_p != NULL) { 2265 *inp_p = inp; 2266 } 2267 } 2268 } 2269 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2270 return (stcb); 2271 } 2272 2273 /* 2274 * lookup an association by an ASCONF lookup address. 2275 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2276 */ 2277 struct sctp_tcb * 2278 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2279 struct sockaddr *dst, struct sctphdr *sh, 2280 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2281 { 2282 struct sctp_tcb *stcb; 2283 union sctp_sockstore remote_store; 2284 struct sctp_paramhdr param_buf, *phdr; 2285 int ptype; 2286 int zero_address = 0; 2287 #ifdef INET 2288 struct sockaddr_in *sin; 2289 #endif 2290 #ifdef INET6 2291 struct sockaddr_in6 *sin6; 2292 #endif 2293 2294 memset(&remote_store, 0, sizeof(remote_store)); 2295 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2296 ¶m_buf, sizeof(struct sctp_paramhdr)); 2297 if (phdr == NULL) { 2298 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2299 __func__); 2300 return NULL; 2301 } 2302 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2303 /* get the correlation address */ 2304 switch (ptype) { 2305 #ifdef INET6 2306 case SCTP_IPV6_ADDRESS: 2307 { 2308 /* ipv6 address param */ 2309 struct sctp_ipv6addr_param *p6, p6_buf; 2310 2311 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2312 return NULL; 2313 } 2314 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2315 offset + sizeof(struct sctp_asconf_chunk), 2316 &p6_buf.ph, sizeof(p6_buf)); 2317 if (p6 == NULL) { 2318 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2319 __func__); 2320 return (NULL); 2321 } 2322 sin6 = &remote_store.sin6; 2323 sin6->sin6_family = AF_INET6; 2324 sin6->sin6_len = sizeof(*sin6); 2325 sin6->sin6_port = sh->src_port; 2326 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2327 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2328 zero_address = 1; 2329 break; 2330 } 2331 #endif 2332 #ifdef INET 2333 case SCTP_IPV4_ADDRESS: 2334 { 2335 /* ipv4 address param */ 2336 struct sctp_ipv4addr_param *p4, p4_buf; 2337 2338 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2339 return NULL; 2340 } 2341 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2342 offset + sizeof(struct sctp_asconf_chunk), 2343 &p4_buf.ph, sizeof(p4_buf)); 2344 if (p4 == NULL) { 2345 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2346 __func__); 2347 return (NULL); 2348 } 2349 sin = &remote_store.sin; 2350 sin->sin_family = AF_INET; 2351 sin->sin_len = sizeof(*sin); 2352 sin->sin_port = sh->src_port; 2353 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2354 if (sin->sin_addr.s_addr == INADDR_ANY) 2355 zero_address = 1; 2356 break; 2357 } 2358 #endif 2359 default: 2360 /* invalid address param type */ 2361 return NULL; 2362 } 2363 2364 if (zero_address) { 2365 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2366 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2367 if (stcb != NULL) { 2368 SCTP_INP_DECR_REF(*inp_p); 2369 } 2370 } else { 2371 stcb = sctp_findassociation_ep_addr(inp_p, 2372 &remote_store.sa, netp, 2373 dst, NULL); 2374 } 2375 return (stcb); 2376 } 2377 2378 /* 2379 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2380 * addresses. This way if we don't get a bind we by default pick a ephemeral 2381 * port with all addresses bound. 2382 */ 2383 int 2384 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2385 { 2386 /* 2387 * we get called when a new endpoint starts up. We need to allocate 2388 * the sctp_inpcb structure from the zone and init it. Mark it as 2389 * unbound and find a port that we can use as an ephemeral with 2390 * INADDR_ANY. If the user binds later no problem we can then add in 2391 * the specific addresses. And setup the default parameters for the 2392 * EP. 2393 */ 2394 int i, error; 2395 struct sctp_inpcb *inp; 2396 struct sctp_pcb *m; 2397 struct timeval time; 2398 sctp_sharedkey_t *null_key; 2399 2400 error = 0; 2401 2402 SCTP_INP_INFO_WLOCK(); 2403 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2404 if (inp == NULL) { 2405 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2406 SCTP_INP_INFO_WUNLOCK(); 2407 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2408 return (ENOBUFS); 2409 } 2410 /* zap it */ 2411 memset(inp, 0, sizeof(*inp)); 2412 2413 /* bump generations */ 2414 /* setup socket pointers */ 2415 inp->sctp_socket = so; 2416 inp->ip_inp.inp.inp_socket = so; 2417 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2418 #ifdef INET6 2419 if (INP_SOCKAF(so) == AF_INET6) { 2420 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2421 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2422 } 2423 if (MODULE_GLOBAL(ip6_v6only)) { 2424 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2425 } 2426 } 2427 #endif 2428 inp->sctp_associd_counter = 1; 2429 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2430 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2431 inp->max_cwnd = 0; 2432 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2433 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2434 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2435 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2436 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2437 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2438 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2439 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2440 inp->idata_supported = 0; 2441 2442 inp->fibnum = so->so_fibnum; 2443 /* init the small hash table we use to track asocid <-> tcb */ 2444 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2445 if (inp->sctp_asocidhash == NULL) { 2446 crfree(inp->ip_inp.inp.inp_cred); 2447 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2448 SCTP_INP_INFO_WUNLOCK(); 2449 return (ENOBUFS); 2450 } 2451 SCTP_INCR_EP_COUNT(); 2452 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2453 SCTP_INP_INFO_WUNLOCK(); 2454 2455 so->so_pcb = (caddr_t)inp; 2456 2457 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2458 /* UDP style socket */ 2459 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2460 SCTP_PCB_FLAGS_UNBOUND); 2461 /* Be sure it is NON-BLOCKING IO for UDP */ 2462 /* SCTP_SET_SO_NBIO(so); */ 2463 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2464 /* TCP style socket */ 2465 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2466 SCTP_PCB_FLAGS_UNBOUND); 2467 /* Be sure we have blocking IO by default */ 2468 SOCK_LOCK(so); 2469 SCTP_CLEAR_SO_NBIO(so); 2470 SOCK_UNLOCK(so); 2471 } else { 2472 /* 2473 * unsupported socket type (RAW, etc)- in case we missed it 2474 * in protosw 2475 */ 2476 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2477 so->so_pcb = NULL; 2478 crfree(inp->ip_inp.inp.inp_cred); 2479 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2480 return (EOPNOTSUPP); 2481 } 2482 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2483 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2484 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2485 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2486 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2487 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2488 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2489 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2490 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2491 } 2492 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2493 &inp->sctp_hashmark); 2494 if (inp->sctp_tcbhash == NULL) { 2495 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2496 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2497 so->so_pcb = NULL; 2498 crfree(inp->ip_inp.inp.inp_cred); 2499 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2500 return (ENOBUFS); 2501 } 2502 inp->def_vrf_id = vrf_id; 2503 2504 SCTP_INP_INFO_WLOCK(); 2505 SCTP_INP_LOCK_INIT(inp); 2506 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2507 SCTP_INP_READ_INIT(inp); 2508 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2509 /* lock the new ep */ 2510 SCTP_INP_WLOCK(inp); 2511 2512 /* add it to the info area */ 2513 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2514 SCTP_INP_INFO_WUNLOCK(); 2515 2516 TAILQ_INIT(&inp->read_queue); 2517 LIST_INIT(&inp->sctp_addr_list); 2518 2519 LIST_INIT(&inp->sctp_asoc_list); 2520 2521 #ifdef SCTP_TRACK_FREED_ASOCS 2522 /* TEMP CODE */ 2523 LIST_INIT(&inp->sctp_asoc_free_list); 2524 #endif 2525 /* Init the timer structure for signature change */ 2526 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2527 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2528 2529 /* now init the actual endpoint default data */ 2530 m = &inp->sctp_ep; 2531 2532 /* setup the base timeout information */ 2533 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2534 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2535 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2536 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2537 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2538 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2539 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2540 /* all max/min max are in ms */ 2541 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2542 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2543 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2544 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2545 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2546 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2547 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2548 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2549 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2550 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2551 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2552 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2553 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2554 2555 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2556 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2557 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2558 /* number of streams to pre-open on a association */ 2559 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2560 2561 m->default_mtu = 0; 2562 /* Add adaptation cookie */ 2563 m->adaptation_layer_indicator = 0; 2564 m->adaptation_layer_indicator_provided = 0; 2565 2566 /* seed random number generator */ 2567 m->random_counter = 1; 2568 m->store_at = SCTP_SIGNATURE_SIZE; 2569 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2570 sctp_fill_random_store(m); 2571 2572 /* Minimum cookie size */ 2573 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2574 sizeof(struct sctp_state_cookie); 2575 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2576 2577 /* Setup the initial secret */ 2578 (void)SCTP_GETTIME_TIMEVAL(&time); 2579 m->time_of_secret_change = time.tv_sec; 2580 2581 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2582 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2583 } 2584 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2585 2586 /* How long is a cookie good for ? */ 2587 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2588 /* 2589 * Initialize authentication parameters 2590 */ 2591 m->local_hmacs = sctp_default_supported_hmaclist(); 2592 m->local_auth_chunks = sctp_alloc_chunklist(); 2593 if (inp->asconf_supported) { 2594 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2595 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2596 } 2597 m->default_dscp = 0; 2598 #ifdef INET6 2599 m->default_flowlabel = 0; 2600 #endif 2601 m->port = 0; /* encapsulation disabled by default */ 2602 LIST_INIT(&m->shared_keys); 2603 /* add default NULL key as key id 0 */ 2604 null_key = sctp_alloc_sharedkey(); 2605 sctp_insert_sharedkey(&m->shared_keys, null_key); 2606 SCTP_INP_WUNLOCK(inp); 2607 #ifdef SCTP_LOG_CLOSING 2608 sctp_log_closing(inp, NULL, 12); 2609 #endif 2610 return (error); 2611 } 2612 2613 void 2614 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2615 struct sctp_tcb *stcb) 2616 { 2617 struct sctp_nets *net; 2618 uint16_t lport, rport; 2619 struct sctppcbhead *head; 2620 struct sctp_laddr *laddr, *oladdr; 2621 2622 atomic_add_int(&stcb->asoc.refcnt, 1); 2623 SCTP_TCB_UNLOCK(stcb); 2624 SCTP_INP_INFO_WLOCK(); 2625 SCTP_INP_WLOCK(old_inp); 2626 SCTP_INP_WLOCK(new_inp); 2627 SCTP_TCB_LOCK(stcb); 2628 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2629 2630 new_inp->sctp_ep.time_of_secret_change = 2631 old_inp->sctp_ep.time_of_secret_change; 2632 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2633 sizeof(old_inp->sctp_ep.secret_key)); 2634 new_inp->sctp_ep.current_secret_number = 2635 old_inp->sctp_ep.current_secret_number; 2636 new_inp->sctp_ep.last_secret_number = 2637 old_inp->sctp_ep.last_secret_number; 2638 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2639 2640 /* make it so new data pours into the new socket */ 2641 stcb->sctp_socket = new_inp->sctp_socket; 2642 stcb->sctp_ep = new_inp; 2643 2644 /* Copy the port across */ 2645 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2646 rport = stcb->rport; 2647 /* Pull the tcb from the old association */ 2648 LIST_REMOVE(stcb, sctp_tcbhash); 2649 LIST_REMOVE(stcb, sctp_tcblist); 2650 if (stcb->asoc.in_asocid_hash) { 2651 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2652 } 2653 /* Now insert the new_inp into the TCP connected hash */ 2654 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2655 2656 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2657 /* Its safe to access */ 2658 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2659 2660 /* Now move the tcb into the endpoint list */ 2661 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2662 /* 2663 * Question, do we even need to worry about the ep-hash since we 2664 * only have one connection? Probably not :> so lets get rid of it 2665 * and not suck up any kernel memory in that. 2666 */ 2667 if (stcb->asoc.in_asocid_hash) { 2668 struct sctpasochead *lhd; 2669 2670 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2671 new_inp->hashasocidmark)]; 2672 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2673 } 2674 /* Ok. Let's restart timer. */ 2675 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2676 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2677 stcb, net); 2678 } 2679 2680 SCTP_INP_INFO_WUNLOCK(); 2681 if (new_inp->sctp_tcbhash != NULL) { 2682 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2683 new_inp->sctp_tcbhash = NULL; 2684 } 2685 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2686 /* Subset bound, so copy in the laddr list from the old_inp */ 2687 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2688 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2689 if (laddr == NULL) { 2690 /* 2691 * Gak, what can we do? This assoc is really 2692 * HOSED. We probably should send an abort 2693 * here. 2694 */ 2695 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2696 continue; 2697 } 2698 SCTP_INCR_LADDR_COUNT(); 2699 memset(laddr, 0, sizeof(*laddr)); 2700 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2701 laddr->ifa = oladdr->ifa; 2702 atomic_add_int(&laddr->ifa->refcount, 1); 2703 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2704 sctp_nxt_addr); 2705 new_inp->laddr_count++; 2706 if (oladdr == stcb->asoc.last_used_address) { 2707 stcb->asoc.last_used_address = laddr; 2708 } 2709 } 2710 } 2711 /* Now any running timers need to be adjusted. */ 2712 if (stcb->asoc.dack_timer.ep == old_inp) { 2713 SCTP_INP_DECR_REF(old_inp); 2714 stcb->asoc.dack_timer.ep = new_inp; 2715 SCTP_INP_INCR_REF(new_inp); 2716 } 2717 if (stcb->asoc.asconf_timer.ep == old_inp) { 2718 SCTP_INP_DECR_REF(old_inp); 2719 stcb->asoc.asconf_timer.ep = new_inp; 2720 SCTP_INP_INCR_REF(new_inp); 2721 } 2722 if (stcb->asoc.strreset_timer.ep == old_inp) { 2723 SCTP_INP_DECR_REF(old_inp); 2724 stcb->asoc.strreset_timer.ep = new_inp; 2725 SCTP_INP_INCR_REF(new_inp); 2726 } 2727 if (stcb->asoc.shut_guard_timer.ep == old_inp) { 2728 SCTP_INP_DECR_REF(old_inp); 2729 stcb->asoc.shut_guard_timer.ep = new_inp; 2730 SCTP_INP_INCR_REF(new_inp); 2731 } 2732 if (stcb->asoc.autoclose_timer.ep == old_inp) { 2733 SCTP_INP_DECR_REF(old_inp); 2734 stcb->asoc.autoclose_timer.ep = new_inp; 2735 SCTP_INP_INCR_REF(new_inp); 2736 } 2737 if (stcb->asoc.delete_prim_timer.ep == old_inp) { 2738 SCTP_INP_DECR_REF(old_inp); 2739 stcb->asoc.delete_prim_timer.ep = new_inp; 2740 SCTP_INP_INCR_REF(new_inp); 2741 } 2742 /* now what about the nets? */ 2743 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2744 if (net->pmtu_timer.ep == old_inp) { 2745 SCTP_INP_DECR_REF(old_inp); 2746 net->pmtu_timer.ep = new_inp; 2747 SCTP_INP_INCR_REF(new_inp); 2748 } 2749 if (net->hb_timer.ep == old_inp) { 2750 SCTP_INP_DECR_REF(old_inp); 2751 net->hb_timer.ep = new_inp; 2752 SCTP_INP_INCR_REF(new_inp); 2753 } 2754 if (net->rxt_timer.ep == old_inp) { 2755 SCTP_INP_DECR_REF(old_inp); 2756 net->rxt_timer.ep = new_inp; 2757 SCTP_INP_INCR_REF(new_inp); 2758 } 2759 } 2760 SCTP_INP_WUNLOCK(new_inp); 2761 SCTP_INP_WUNLOCK(old_inp); 2762 } 2763 2764 /* 2765 * insert an laddr entry with the given ifa for the desired list 2766 */ 2767 static int 2768 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2769 { 2770 struct sctp_laddr *laddr; 2771 2772 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2773 if (laddr == NULL) { 2774 /* out of memory? */ 2775 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2776 return (EINVAL); 2777 } 2778 SCTP_INCR_LADDR_COUNT(); 2779 memset(laddr, 0, sizeof(*laddr)); 2780 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2781 laddr->ifa = ifa; 2782 laddr->action = act; 2783 atomic_add_int(&ifa->refcount, 1); 2784 /* insert it */ 2785 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2786 2787 return (0); 2788 } 2789 2790 /* 2791 * Remove an laddr entry from the local address list (on an assoc) 2792 */ 2793 static void 2794 sctp_remove_laddr(struct sctp_laddr *laddr) 2795 { 2796 2797 /* remove from the list */ 2798 LIST_REMOVE(laddr, sctp_nxt_addr); 2799 sctp_free_ifa(laddr->ifa); 2800 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2801 SCTP_DECR_LADDR_COUNT(); 2802 } 2803 2804 /* sctp_ifap is used to bypass normal local address validation checks */ 2805 int 2806 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2807 struct sctp_ifa *sctp_ifap, struct thread *p) 2808 { 2809 /* bind a ep to a socket address */ 2810 struct sctppcbhead *head; 2811 struct sctp_inpcb *inp, *inp_tmp; 2812 struct inpcb *ip_inp; 2813 int port_reuse_active = 0; 2814 int bindall; 2815 uint16_t lport; 2816 int error; 2817 uint32_t vrf_id; 2818 2819 lport = 0; 2820 bindall = 1; 2821 inp = (struct sctp_inpcb *)so->so_pcb; 2822 ip_inp = (struct inpcb *)so->so_pcb; 2823 #ifdef SCTP_DEBUG 2824 if (addr) { 2825 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2826 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2827 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2828 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2829 } 2830 #endif 2831 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2832 /* already did a bind, subsequent binds NOT allowed ! */ 2833 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2834 return (EINVAL); 2835 } 2836 #ifdef INVARIANTS 2837 if (p == NULL) 2838 panic("null proc/thread"); 2839 #endif 2840 if (addr != NULL) { 2841 switch (addr->sa_family) { 2842 #ifdef INET 2843 case AF_INET: 2844 { 2845 struct sockaddr_in *sin; 2846 2847 /* IPV6_V6ONLY socket? */ 2848 if (SCTP_IPV6_V6ONLY(inp)) { 2849 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2850 return (EINVAL); 2851 } 2852 if (addr->sa_len != sizeof(*sin)) { 2853 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2854 return (EINVAL); 2855 } 2856 2857 sin = (struct sockaddr_in *)addr; 2858 lport = sin->sin_port; 2859 /* 2860 * For LOOPBACK the prison_local_ip4() call 2861 * will transmute the ip address to the 2862 * proper value. 2863 */ 2864 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2865 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2866 return (error); 2867 } 2868 if (sin->sin_addr.s_addr != INADDR_ANY) { 2869 bindall = 0; 2870 } 2871 break; 2872 } 2873 #endif 2874 #ifdef INET6 2875 case AF_INET6: 2876 { 2877 /* 2878 * Only for pure IPv6 Address. (No IPv4 2879 * Mapped!) 2880 */ 2881 struct sockaddr_in6 *sin6; 2882 2883 sin6 = (struct sockaddr_in6 *)addr; 2884 2885 if (addr->sa_len != sizeof(*sin6)) { 2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2887 return (EINVAL); 2888 } 2889 lport = sin6->sin6_port; 2890 /* 2891 * For LOOPBACK the prison_local_ip6() call 2892 * will transmute the ipv6 address to the 2893 * proper value. 2894 */ 2895 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2896 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2898 return (error); 2899 } 2900 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2901 bindall = 0; 2902 /* KAME hack: embed scopeid */ 2903 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2904 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2905 return (EINVAL); 2906 } 2907 } 2908 /* this must be cleared for ifa_ifwithaddr() */ 2909 sin6->sin6_scope_id = 0; 2910 break; 2911 } 2912 #endif 2913 default: 2914 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2915 return (EAFNOSUPPORT); 2916 } 2917 } 2918 SCTP_INP_INFO_WLOCK(); 2919 SCTP_INP_WLOCK(inp); 2920 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2921 vrf_id = inp->def_vrf_id; 2922 2923 /* increase our count due to the unlock we do */ 2924 SCTP_INP_INCR_REF(inp); 2925 if (lport) { 2926 /* 2927 * Did the caller specify a port? if so we must see if an ep 2928 * already has this one bound. 2929 */ 2930 /* got to be root to get at low ports */ 2931 if (ntohs(lport) < IPPORT_RESERVED) { 2932 if ((p != NULL) && ((error = 2933 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2934 ) != 0)) { 2935 SCTP_INP_DECR_REF(inp); 2936 SCTP_INP_WUNLOCK(inp); 2937 SCTP_INP_INFO_WUNLOCK(); 2938 return (error); 2939 } 2940 } 2941 SCTP_INP_WUNLOCK(inp); 2942 if (bindall) { 2943 vrf_id = inp->def_vrf_id; 2944 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2945 if (inp_tmp != NULL) { 2946 /* 2947 * lock guy returned and lower count note 2948 * that we are not bound so inp_tmp should 2949 * NEVER be inp. And it is this inp 2950 * (inp_tmp) that gets the reference bump, 2951 * so we must lower it. 2952 */ 2953 SCTP_INP_DECR_REF(inp_tmp); 2954 /* unlock info */ 2955 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2956 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2957 /* 2958 * Ok, must be one-2-one and 2959 * allowing port re-use 2960 */ 2961 port_reuse_active = 1; 2962 goto continue_anyway; 2963 } 2964 SCTP_INP_DECR_REF(inp); 2965 SCTP_INP_INFO_WUNLOCK(); 2966 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2967 return (EADDRINUSE); 2968 } 2969 } else { 2970 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2971 if (inp_tmp != NULL) { 2972 /* 2973 * lock guy returned and lower count note 2974 * that we are not bound so inp_tmp should 2975 * NEVER be inp. And it is this inp 2976 * (inp_tmp) that gets the reference bump, 2977 * so we must lower it. 2978 */ 2979 SCTP_INP_DECR_REF(inp_tmp); 2980 /* unlock info */ 2981 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2982 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2983 /* 2984 * Ok, must be one-2-one and 2985 * allowing port re-use 2986 */ 2987 port_reuse_active = 1; 2988 goto continue_anyway; 2989 } 2990 SCTP_INP_DECR_REF(inp); 2991 SCTP_INP_INFO_WUNLOCK(); 2992 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2993 return (EADDRINUSE); 2994 } 2995 } 2996 continue_anyway: 2997 SCTP_INP_WLOCK(inp); 2998 if (bindall) { 2999 /* verify that no lport is not used by a singleton */ 3000 if ((port_reuse_active == 0) && 3001 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3002 /* Sorry someone already has this one bound */ 3003 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3004 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3005 port_reuse_active = 1; 3006 } else { 3007 SCTP_INP_DECR_REF(inp); 3008 SCTP_INP_WUNLOCK(inp); 3009 SCTP_INP_INFO_WUNLOCK(); 3010 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3011 return (EADDRINUSE); 3012 } 3013 } 3014 } 3015 } else { 3016 uint16_t first, last, candidate; 3017 uint16_t count; 3018 int done; 3019 3020 if (ip_inp->inp_flags & INP_HIGHPORT) { 3021 first = MODULE_GLOBAL(ipport_hifirstauto); 3022 last = MODULE_GLOBAL(ipport_hilastauto); 3023 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3024 if (p && (error = 3025 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3026 )) { 3027 SCTP_INP_DECR_REF(inp); 3028 SCTP_INP_WUNLOCK(inp); 3029 SCTP_INP_INFO_WUNLOCK(); 3030 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3031 return (error); 3032 } 3033 first = MODULE_GLOBAL(ipport_lowfirstauto); 3034 last = MODULE_GLOBAL(ipport_lowlastauto); 3035 } else { 3036 first = MODULE_GLOBAL(ipport_firstauto); 3037 last = MODULE_GLOBAL(ipport_lastauto); 3038 } 3039 if (first > last) { 3040 uint16_t temp; 3041 3042 temp = first; 3043 first = last; 3044 last = temp; 3045 } 3046 count = last - first + 1; /* number of candidates */ 3047 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3048 3049 done = 0; 3050 while (!done) { 3051 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3052 done = 1; 3053 } 3054 if (!done) { 3055 if (--count == 0) { 3056 SCTP_INP_DECR_REF(inp); 3057 SCTP_INP_WUNLOCK(inp); 3058 SCTP_INP_INFO_WUNLOCK(); 3059 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3060 return (EADDRINUSE); 3061 } 3062 if (candidate == last) 3063 candidate = first; 3064 else 3065 candidate = candidate + 1; 3066 } 3067 } 3068 lport = htons(candidate); 3069 } 3070 SCTP_INP_DECR_REF(inp); 3071 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3072 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3073 /* 3074 * this really should not happen. The guy did a non-blocking 3075 * bind and then did a close at the same time. 3076 */ 3077 SCTP_INP_WUNLOCK(inp); 3078 SCTP_INP_INFO_WUNLOCK(); 3079 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3080 return (EINVAL); 3081 } 3082 /* ok we look clear to give out this port, so lets setup the binding */ 3083 if (bindall) { 3084 /* binding to all addresses, so just set in the proper flags */ 3085 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3086 /* set the automatic addr changes from kernel flag */ 3087 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3088 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3089 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3090 } else { 3091 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3092 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3093 } 3094 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3095 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3096 } else { 3097 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3098 } 3099 /* 3100 * set the automatic mobility_base from kernel flag (by 3101 * micchie) 3102 */ 3103 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3106 } else { 3107 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3109 } 3110 /* 3111 * set the automatic mobility_fasthandoff from kernel flag 3112 * (by micchie) 3113 */ 3114 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3115 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3116 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3117 } else { 3118 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3119 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3120 } 3121 } else { 3122 /* 3123 * bind specific, make sure flags is off and add a new 3124 * address structure to the sctp_addr_list inside the ep 3125 * structure. 3126 * 3127 * We will need to allocate one and insert it at the head. 3128 * The socketopt call can just insert new addresses in there 3129 * as well. It will also have to do the embed scope kame 3130 * hack too (before adding). 3131 */ 3132 struct sctp_ifa *ifa; 3133 union sctp_sockstore store; 3134 3135 memset(&store, 0, sizeof(store)); 3136 switch (addr->sa_family) { 3137 #ifdef INET 3138 case AF_INET: 3139 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3140 store.sin.sin_port = 0; 3141 break; 3142 #endif 3143 #ifdef INET6 3144 case AF_INET6: 3145 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3146 store.sin6.sin6_port = 0; 3147 break; 3148 #endif 3149 default: 3150 break; 3151 } 3152 /* 3153 * first find the interface with the bound address need to 3154 * zero out the port to find the address! yuck! can't do 3155 * this earlier since need port for sctp_pcb_findep() 3156 */ 3157 if (sctp_ifap != NULL) { 3158 ifa = sctp_ifap; 3159 } else { 3160 /* 3161 * Note for BSD we hit here always other O/S's will 3162 * pass things in via the sctp_ifap argument. 3163 */ 3164 ifa = sctp_find_ifa_by_addr(&store.sa, 3165 vrf_id, SCTP_ADDR_NOT_LOCKED); 3166 } 3167 if (ifa == NULL) { 3168 /* Can't find an interface with that address */ 3169 SCTP_INP_WUNLOCK(inp); 3170 SCTP_INP_INFO_WUNLOCK(); 3171 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3172 return (EADDRNOTAVAIL); 3173 } 3174 #ifdef INET6 3175 if (addr->sa_family == AF_INET6) { 3176 /* GAK, more FIXME IFA lock? */ 3177 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3178 /* Can't bind a non-existent addr. */ 3179 SCTP_INP_WUNLOCK(inp); 3180 SCTP_INP_INFO_WUNLOCK(); 3181 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3182 return (EINVAL); 3183 } 3184 } 3185 #endif 3186 /* we're not bound all */ 3187 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3188 /* allow bindx() to send ASCONF's for binding changes */ 3189 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3190 /* clear automatic addr changes from kernel flag */ 3191 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3192 3193 /* add this address to the endpoint list */ 3194 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3195 if (error != 0) { 3196 SCTP_INP_WUNLOCK(inp); 3197 SCTP_INP_INFO_WUNLOCK(); 3198 return (error); 3199 } 3200 inp->laddr_count++; 3201 } 3202 /* find the bucket */ 3203 if (port_reuse_active) { 3204 /* Put it into tcp 1-2-1 hash */ 3205 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3206 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3207 } else { 3208 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3209 } 3210 /* put it in the bucket */ 3211 LIST_INSERT_HEAD(head, inp, sctp_hash); 3212 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3213 (void *)head, ntohs(lport), port_reuse_active); 3214 /* set in the port */ 3215 inp->sctp_lport = lport; 3216 3217 /* turn off just the unbound flag */ 3218 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3219 SCTP_INP_WUNLOCK(inp); 3220 SCTP_INP_INFO_WUNLOCK(); 3221 return (0); 3222 } 3223 3224 static void 3225 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3226 { 3227 struct sctp_iterator *it, *nit; 3228 3229 /* 3230 * We enter with the only the ITERATOR_LOCK in place and a write 3231 * lock on the inp_info stuff. 3232 */ 3233 it = sctp_it_ctl.cur_it; 3234 if (it && (it->vn != curvnet)) { 3235 /* Its not looking at our VNET */ 3236 return; 3237 } 3238 if (it && (it->inp == inp)) { 3239 /* 3240 * This is tricky and we hold the iterator lock, but when it 3241 * returns and gets the lock (when we release it) the 3242 * iterator will try to operate on inp. We need to stop that 3243 * from happening. But of course the iterator has a 3244 * reference on the stcb and inp. We can mark it and it will 3245 * stop. 3246 * 3247 * If its a single iterator situation, we set the end 3248 * iterator flag. Otherwise we set the iterator to go to the 3249 * next inp. 3250 * 3251 */ 3252 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3253 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3254 } else { 3255 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3256 } 3257 } 3258 /* 3259 * Now go through and remove any single reference to our inp that 3260 * may be still pending on the list 3261 */ 3262 SCTP_IPI_ITERATOR_WQ_LOCK(); 3263 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3264 if (it->vn != curvnet) { 3265 continue; 3266 } 3267 if (it->inp == inp) { 3268 /* This one points to me is it inp specific? */ 3269 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3270 /* Remove and free this one */ 3271 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3272 it, sctp_nxt_itr); 3273 if (it->function_atend != NULL) { 3274 (*it->function_atend) (it->pointer, it->val); 3275 } 3276 SCTP_FREE(it, SCTP_M_ITER); 3277 } else { 3278 it->inp = LIST_NEXT(it->inp, sctp_list); 3279 if (it->inp) { 3280 SCTP_INP_INCR_REF(it->inp); 3281 } 3282 } 3283 /* 3284 * When its put in the refcnt is incremented so decr 3285 * it 3286 */ 3287 SCTP_INP_DECR_REF(inp); 3288 } 3289 } 3290 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3291 } 3292 3293 /* release sctp_inpcb unbind the port */ 3294 void 3295 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3296 { 3297 /* 3298 * Here we free a endpoint. We must find it (if it is in the Hash 3299 * table) and remove it from there. Then we must also find it in the 3300 * overall list and remove it from there. After all removals are 3301 * complete then any timer has to be stopped. Then start the actual 3302 * freeing. a) Any local lists. b) Any associations. c) The hash of 3303 * all associations. d) finally the ep itself. 3304 */ 3305 struct sctp_tcb *asoc, *nasoc; 3306 struct sctp_laddr *laddr, *nladdr; 3307 struct inpcb *ip_pcb; 3308 struct socket *so; 3309 int being_refed = 0; 3310 struct sctp_queued_to_read *sq, *nsq; 3311 int cnt; 3312 sctp_sharedkey_t *shared_key, *nshared_key; 3313 3314 #ifdef SCTP_LOG_CLOSING 3315 sctp_log_closing(inp, NULL, 0); 3316 #endif 3317 SCTP_ITERATOR_LOCK(); 3318 /* mark any iterators on the list or being processed */ 3319 sctp_iterator_inp_being_freed(inp); 3320 SCTP_ITERATOR_UNLOCK(); 3321 so = inp->sctp_socket; 3322 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3323 /* been here before.. eeks.. get out of here */ 3324 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3325 #ifdef SCTP_LOG_CLOSING 3326 sctp_log_closing(inp, NULL, 1); 3327 #endif 3328 return; 3329 } 3330 SCTP_ASOC_CREATE_LOCK(inp); 3331 SCTP_INP_INFO_WLOCK(); 3332 3333 SCTP_INP_WLOCK(inp); 3334 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3335 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3336 /* socket is gone, so no more wakeups allowed */ 3337 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3338 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3339 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3340 } 3341 /* First time through we have the socket lock, after that no more. */ 3342 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3343 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3344 3345 if (inp->control) { 3346 sctp_m_freem(inp->control); 3347 inp->control = NULL; 3348 } 3349 if (inp->pkt) { 3350 sctp_m_freem(inp->pkt); 3351 inp->pkt = NULL; 3352 } 3353 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3354 * here but I will be nice :> (i.e. 3355 * ip_pcb = ep;) */ 3356 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3357 int cnt_in_sd; 3358 3359 cnt_in_sd = 0; 3360 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3361 SCTP_TCB_LOCK(asoc); 3362 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3363 /* Skip guys being freed */ 3364 cnt_in_sd++; 3365 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3366 /* 3367 * Special case - we did not start a 3368 * kill timer on the asoc due to it 3369 * was not closed. So go ahead and 3370 * start it now. 3371 */ 3372 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3373 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3374 } 3375 SCTP_TCB_UNLOCK(asoc); 3376 continue; 3377 } 3378 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3379 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3380 (asoc->asoc.total_output_queue_size == 0)) { 3381 /* 3382 * If we have data in queue, we don't want 3383 * to just free since the app may have done, 3384 * send()/close or connect/send/close. And 3385 * it wants the data to get across first. 3386 */ 3387 /* Just abandon things in the front states */ 3388 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3389 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3390 cnt_in_sd++; 3391 } 3392 continue; 3393 } 3394 /* Disconnect the socket please */ 3395 asoc->sctp_socket = NULL; 3396 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3397 if ((asoc->asoc.size_on_reasm_queue > 0) || 3398 (asoc->asoc.control_pdapi) || 3399 (asoc->asoc.size_on_all_streams > 0) || 3400 (so && (so->so_rcv.sb_cc > 0))) { 3401 /* Left with Data unread */ 3402 struct mbuf *op_err; 3403 3404 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3405 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3406 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3407 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3408 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3409 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3410 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3411 } 3412 if (sctp_free_assoc(inp, asoc, 3413 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3414 cnt_in_sd++; 3415 } 3416 continue; 3417 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3418 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3419 (asoc->asoc.stream_queue_cnt == 0)) { 3420 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3421 goto abort_anyway; 3422 } 3423 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3424 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3425 struct sctp_nets *netp; 3426 3427 /* 3428 * there is nothing queued to send, 3429 * so I send shutdown 3430 */ 3431 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3432 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3433 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3434 } 3435 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3436 sctp_stop_timers_for_shutdown(asoc); 3437 if (asoc->asoc.alternate) { 3438 netp = asoc->asoc.alternate; 3439 } else { 3440 netp = asoc->asoc.primary_destination; 3441 } 3442 sctp_send_shutdown(asoc, netp); 3443 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3444 netp); 3445 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3446 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3447 } 3448 } else { 3449 /* mark into shutdown pending */ 3450 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3451 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3452 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3453 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3454 } 3455 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3456 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3457 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3458 struct mbuf *op_err; 3459 3460 abort_anyway: 3461 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3462 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3463 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3464 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3465 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3466 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3467 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3468 } 3469 if (sctp_free_assoc(inp, asoc, 3470 SCTP_PCBFREE_NOFORCE, 3471 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3472 cnt_in_sd++; 3473 } 3474 continue; 3475 } else { 3476 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3477 } 3478 } 3479 cnt_in_sd++; 3480 SCTP_TCB_UNLOCK(asoc); 3481 } 3482 /* now is there some left in our SHUTDOWN state? */ 3483 if (cnt_in_sd) { 3484 #ifdef SCTP_LOG_CLOSING 3485 sctp_log_closing(inp, NULL, 2); 3486 #endif 3487 inp->sctp_socket = NULL; 3488 SCTP_INP_WUNLOCK(inp); 3489 SCTP_ASOC_CREATE_UNLOCK(inp); 3490 SCTP_INP_INFO_WUNLOCK(); 3491 return; 3492 } 3493 } 3494 inp->sctp_socket = NULL; 3495 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3496 SCTP_PCB_FLAGS_UNBOUND) { 3497 /* 3498 * ok, this guy has been bound. It's port is somewhere in 3499 * the SCTP_BASE_INFO(hash table). Remove it! 3500 */ 3501 LIST_REMOVE(inp, sctp_hash); 3502 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3503 } 3504 3505 /* 3506 * If there is a timer running to kill us, forget it, since it may 3507 * have a contest on the INP lock.. which would cause us to die ... 3508 */ 3509 cnt = 0; 3510 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3511 SCTP_TCB_LOCK(asoc); 3512 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3513 /* Disconnect the socket please */ 3514 asoc->sctp_socket = NULL; 3515 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3516 } 3517 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3518 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3519 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3520 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3521 } 3522 cnt++; 3523 SCTP_TCB_UNLOCK(asoc); 3524 continue; 3525 } 3526 /* Free associations that are NOT killing us */ 3527 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3528 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3529 struct mbuf *op_err; 3530 3531 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3532 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3533 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3534 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3535 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3536 cnt++; 3537 SCTP_TCB_UNLOCK(asoc); 3538 continue; 3539 } 3540 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3541 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3542 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3543 } 3544 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3545 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3546 cnt++; 3547 } 3548 } 3549 if (cnt) { 3550 /* Ok we have someone out there that will kill us */ 3551 #ifdef SCTP_LOG_CLOSING 3552 sctp_log_closing(inp, NULL, 3); 3553 #endif 3554 SCTP_INP_WUNLOCK(inp); 3555 SCTP_ASOC_CREATE_UNLOCK(inp); 3556 SCTP_INP_INFO_WUNLOCK(); 3557 return; 3558 } 3559 if (SCTP_INP_LOCK_CONTENDED(inp)) 3560 being_refed++; 3561 if (SCTP_INP_READ_CONTENDED(inp)) 3562 being_refed++; 3563 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3564 being_refed++; 3565 /* NOTE: 0 refcount also means no timers are referencing us. */ 3566 if ((inp->refcount) || 3567 (being_refed) || 3568 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3569 #ifdef SCTP_LOG_CLOSING 3570 sctp_log_closing(inp, NULL, 4); 3571 #endif 3572 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3573 SCTP_INP_WUNLOCK(inp); 3574 SCTP_ASOC_CREATE_UNLOCK(inp); 3575 SCTP_INP_INFO_WUNLOCK(); 3576 return; 3577 } 3578 inp->sctp_ep.signature_change.type = 0; 3579 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3580 /* 3581 * Remove it from the list .. last thing we need a lock for. 3582 */ 3583 LIST_REMOVE(inp, sctp_list); 3584 SCTP_INP_WUNLOCK(inp); 3585 SCTP_ASOC_CREATE_UNLOCK(inp); 3586 SCTP_INP_INFO_WUNLOCK(); 3587 3588 #ifdef SCTP_LOG_CLOSING 3589 sctp_log_closing(inp, NULL, 5); 3590 #endif 3591 if ((inp->sctp_asocidhash) != NULL) { 3592 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3593 inp->sctp_asocidhash = NULL; 3594 } 3595 /* sa_ignore FREED_MEMORY */ 3596 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3597 /* Its only abandoned if it had data left */ 3598 if (sq->length) 3599 SCTP_STAT_INCR(sctps_left_abandon); 3600 3601 TAILQ_REMOVE(&inp->read_queue, sq, next); 3602 sctp_free_remote_addr(sq->whoFrom); 3603 if (so) 3604 so->so_rcv.sb_cc -= sq->length; 3605 if (sq->data) { 3606 sctp_m_freem(sq->data); 3607 sq->data = NULL; 3608 } 3609 /* 3610 * no need to free the net count, since at this point all 3611 * assoc's are gone. 3612 */ 3613 sctp_free_a_readq(NULL, sq); 3614 } 3615 /* Now the sctp_pcb things */ 3616 /* 3617 * free each asoc if it is not already closed/free. we can't use the 3618 * macro here since le_next will get freed as part of the 3619 * sctp_free_assoc() call. 3620 */ 3621 if (ip_pcb->inp_options) { 3622 (void)sctp_m_free(ip_pcb->inp_options); 3623 ip_pcb->inp_options = 0; 3624 } 3625 #ifdef INET6 3626 if (ip_pcb->inp_vflag & INP_IPV6) { 3627 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3628 } 3629 #endif /* INET6 */ 3630 ip_pcb->inp_vflag = 0; 3631 /* free up authentication fields */ 3632 if (inp->sctp_ep.local_auth_chunks != NULL) 3633 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3634 if (inp->sctp_ep.local_hmacs != NULL) 3635 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3636 3637 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3638 LIST_REMOVE(shared_key, next); 3639 sctp_free_sharedkey(shared_key); 3640 /* sa_ignore FREED_MEMORY */ 3641 } 3642 3643 /* 3644 * if we have an address list the following will free the list of 3645 * ifaddr's that are set into this ep. Again macro limitations here, 3646 * since the LIST_FOREACH could be a bad idea. 3647 */ 3648 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3649 sctp_remove_laddr(laddr); 3650 } 3651 3652 #ifdef SCTP_TRACK_FREED_ASOCS 3653 /* TEMP CODE */ 3654 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3655 LIST_REMOVE(asoc, sctp_tcblist); 3656 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3657 SCTP_DECR_ASOC_COUNT(); 3658 } 3659 /* *** END TEMP CODE *** */ 3660 #endif 3661 /* Now lets see about freeing the EP hash table. */ 3662 if (inp->sctp_tcbhash != NULL) { 3663 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3664 inp->sctp_tcbhash = NULL; 3665 } 3666 /* Now we must put the ep memory back into the zone pool */ 3667 crfree(inp->ip_inp.inp.inp_cred); 3668 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3669 SCTP_INP_LOCK_DESTROY(inp); 3670 SCTP_INP_READ_DESTROY(inp); 3671 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3672 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3673 SCTP_DECR_EP_COUNT(); 3674 } 3675 3676 struct sctp_nets * 3677 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3678 { 3679 struct sctp_nets *net; 3680 3681 /* locate the address */ 3682 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3683 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3684 return (net); 3685 } 3686 return (NULL); 3687 } 3688 3689 int 3690 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3691 { 3692 struct sctp_ifa *sctp_ifa; 3693 3694 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3695 if (sctp_ifa) { 3696 return (1); 3697 } else { 3698 return (0); 3699 } 3700 } 3701 3702 /* 3703 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3704 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3705 * stats of stuff. 3706 */ 3707 int 3708 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3709 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3710 { 3711 /* 3712 * The following is redundant to the same lines in the 3713 * sctp_aloc_assoc() but is needed since others call the add address 3714 * function 3715 */ 3716 struct sctp_nets *net, *netfirst; 3717 int addr_inscope; 3718 3719 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3720 from); 3721 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3722 3723 netfirst = sctp_findnet(stcb, newaddr); 3724 if (netfirst) { 3725 /* 3726 * Lie and return ok, we don't want to make the association 3727 * go away for this behavior. It will happen in the TCP 3728 * model in a connected socket. It does not reach the hash 3729 * table until after the association is built so it can't be 3730 * found. Mark as reachable, since the initial creation will 3731 * have been cleared and the NOT_IN_ASSOC flag will have 3732 * been added... and we don't want to end up removing it 3733 * back out. 3734 */ 3735 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3736 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3737 SCTP_ADDR_UNCONFIRMED); 3738 } else { 3739 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3740 } 3741 3742 return (0); 3743 } 3744 addr_inscope = 1; 3745 switch (newaddr->sa_family) { 3746 #ifdef INET 3747 case AF_INET: 3748 { 3749 struct sockaddr_in *sin; 3750 3751 sin = (struct sockaddr_in *)newaddr; 3752 if (sin->sin_addr.s_addr == 0) { 3753 /* Invalid address */ 3754 return (-1); 3755 } 3756 /* zero out the zero area */ 3757 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3758 3759 /* assure len is set */ 3760 sin->sin_len = sizeof(struct sockaddr_in); 3761 if (set_scope) { 3762 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3763 stcb->asoc.scope.ipv4_local_scope = 1; 3764 } 3765 } else { 3766 /* Validate the address is in scope */ 3767 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3768 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3769 addr_inscope = 0; 3770 } 3771 } 3772 break; 3773 } 3774 #endif 3775 #ifdef INET6 3776 case AF_INET6: 3777 { 3778 struct sockaddr_in6 *sin6; 3779 3780 sin6 = (struct sockaddr_in6 *)newaddr; 3781 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3782 /* Invalid address */ 3783 return (-1); 3784 } 3785 /* assure len is set */ 3786 sin6->sin6_len = sizeof(struct sockaddr_in6); 3787 if (set_scope) { 3788 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3789 stcb->asoc.scope.loopback_scope = 1; 3790 stcb->asoc.scope.local_scope = 0; 3791 stcb->asoc.scope.ipv4_local_scope = 1; 3792 stcb->asoc.scope.site_scope = 1; 3793 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3794 /* 3795 * If the new destination is a 3796 * LINK_LOCAL we must have common 3797 * site scope. Don't set the local 3798 * scope since we may not share all 3799 * links, only loopback can do this. 3800 * Links on the local network would 3801 * also be on our private network 3802 * for v4 too. 3803 */ 3804 stcb->asoc.scope.ipv4_local_scope = 1; 3805 stcb->asoc.scope.site_scope = 1; 3806 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3807 /* 3808 * If the new destination is 3809 * SITE_LOCAL then we must have site 3810 * scope in common. 3811 */ 3812 stcb->asoc.scope.site_scope = 1; 3813 } 3814 } else { 3815 /* Validate the address is in scope */ 3816 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3817 (stcb->asoc.scope.loopback_scope == 0)) { 3818 addr_inscope = 0; 3819 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3820 (stcb->asoc.scope.local_scope == 0)) { 3821 addr_inscope = 0; 3822 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3823 (stcb->asoc.scope.site_scope == 0)) { 3824 addr_inscope = 0; 3825 } 3826 } 3827 break; 3828 } 3829 #endif 3830 default: 3831 /* not supported family type */ 3832 return (-1); 3833 } 3834 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3835 if (net == NULL) { 3836 return (-1); 3837 } 3838 SCTP_INCR_RADDR_COUNT(); 3839 memset(net, 0, sizeof(struct sctp_nets)); 3840 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3841 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3842 switch (newaddr->sa_family) { 3843 #ifdef INET 3844 case AF_INET: 3845 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3846 break; 3847 #endif 3848 #ifdef INET6 3849 case AF_INET6: 3850 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3851 break; 3852 #endif 3853 default: 3854 break; 3855 } 3856 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3857 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3858 stcb->asoc.scope.loopback_scope = 1; 3859 stcb->asoc.scope.ipv4_local_scope = 1; 3860 stcb->asoc.scope.local_scope = 0; 3861 stcb->asoc.scope.site_scope = 1; 3862 addr_inscope = 1; 3863 } 3864 net->failure_threshold = stcb->asoc.def_net_failure; 3865 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3866 if (addr_inscope == 0) { 3867 net->dest_state = (SCTP_ADDR_REACHABLE | 3868 SCTP_ADDR_OUT_OF_SCOPE); 3869 } else { 3870 if (from == SCTP_ADDR_IS_CONFIRMED) 3871 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3872 net->dest_state = SCTP_ADDR_REACHABLE; 3873 else 3874 net->dest_state = SCTP_ADDR_REACHABLE | 3875 SCTP_ADDR_UNCONFIRMED; 3876 } 3877 /* 3878 * We set this to 0, the timer code knows that this means its an 3879 * initial value 3880 */ 3881 net->rto_needed = 1; 3882 net->RTO = 0; 3883 net->RTO_measured = 0; 3884 stcb->asoc.numnets++; 3885 net->ref_count = 1; 3886 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3887 net->port = port; 3888 net->dscp = stcb->asoc.default_dscp; 3889 #ifdef INET6 3890 net->flowlabel = stcb->asoc.default_flowlabel; 3891 #endif 3892 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3893 net->dest_state |= SCTP_ADDR_NOHB; 3894 } else { 3895 net->dest_state &= ~SCTP_ADDR_NOHB; 3896 } 3897 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3898 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3899 } else { 3900 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3901 } 3902 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3903 /* Init the timer structure */ 3904 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3905 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3906 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3907 3908 /* Now generate a route for this guy */ 3909 #ifdef INET6 3910 /* KAME hack: embed scopeid */ 3911 if (newaddr->sa_family == AF_INET6) { 3912 struct sockaddr_in6 *sin6; 3913 3914 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3915 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3916 sin6->sin6_scope_id = 0; 3917 } 3918 #endif 3919 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3920 stcb->asoc.vrf_id, 3921 stcb->sctp_ep->fibnum); 3922 3923 net->src_addr_selected = 0; 3924 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3925 /* Get source address */ 3926 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3927 stcb, 3928 (sctp_route_t *)&net->ro, 3929 net, 3930 0, 3931 stcb->asoc.vrf_id); 3932 if (stcb->asoc.default_mtu > 0) { 3933 net->mtu = stcb->asoc.default_mtu; 3934 switch (net->ro._l_addr.sa.sa_family) { 3935 #ifdef INET 3936 case AF_INET: 3937 net->mtu += SCTP_MIN_V4_OVERHEAD; 3938 break; 3939 #endif 3940 #ifdef INET6 3941 case AF_INET6: 3942 net->mtu += SCTP_MIN_OVERHEAD; 3943 break; 3944 #endif 3945 default: 3946 break; 3947 } 3948 #if defined(INET) || defined(INET6) 3949 if (net->port) { 3950 net->mtu += (uint32_t)sizeof(struct udphdr); 3951 } 3952 #endif 3953 } else if (net->ro._s_addr != NULL) { 3954 uint32_t imtu, rmtu, hcmtu; 3955 3956 net->src_addr_selected = 1; 3957 /* Now get the interface MTU */ 3958 if (net->ro._s_addr->ifn_p != NULL) { 3959 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3960 } else { 3961 imtu = 0; 3962 } 3963 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 3964 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3965 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3966 } 3967 } 3968 if (net->mtu == 0) { 3969 if (stcb->asoc.default_mtu > 0) { 3970 net->mtu = stcb->asoc.default_mtu; 3971 switch (net->ro._l_addr.sa.sa_family) { 3972 #ifdef INET 3973 case AF_INET: 3974 net->mtu += SCTP_MIN_V4_OVERHEAD; 3975 break; 3976 #endif 3977 #ifdef INET6 3978 case AF_INET6: 3979 net->mtu += SCTP_MIN_OVERHEAD; 3980 break; 3981 #endif 3982 default: 3983 break; 3984 } 3985 #if defined(INET) || defined(INET6) 3986 if (net->port) { 3987 net->mtu += (uint32_t)sizeof(struct udphdr); 3988 } 3989 #endif 3990 } else { 3991 switch (newaddr->sa_family) { 3992 #ifdef INET 3993 case AF_INET: 3994 net->mtu = SCTP_DEFAULT_MTU; 3995 break; 3996 #endif 3997 #ifdef INET6 3998 case AF_INET6: 3999 net->mtu = 1280; 4000 break; 4001 #endif 4002 default: 4003 break; 4004 } 4005 } 4006 } 4007 #if defined(INET) || defined(INET6) 4008 if (net->port) { 4009 net->mtu -= (uint32_t)sizeof(struct udphdr); 4010 } 4011 #endif 4012 if (from == SCTP_ALLOC_ASOC) { 4013 stcb->asoc.smallest_mtu = net->mtu; 4014 } 4015 if (stcb->asoc.smallest_mtu > net->mtu) { 4016 sctp_pathmtu_adjustment(stcb, net->mtu); 4017 } 4018 #ifdef INET6 4019 if (newaddr->sa_family == AF_INET6) { 4020 struct sockaddr_in6 *sin6; 4021 4022 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4023 (void)sa6_recoverscope(sin6); 4024 } 4025 #endif 4026 4027 /* JRS - Use the congestion control given in the CC module */ 4028 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4029 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4030 4031 /* 4032 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4033 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4034 */ 4035 net->find_pseudo_cumack = 1; 4036 net->find_rtx_pseudo_cumack = 1; 4037 /* Choose an initial flowid. */ 4038 net->flowid = stcb->asoc.my_vtag ^ 4039 ntohs(stcb->rport) ^ 4040 ntohs(stcb->sctp_ep->sctp_lport); 4041 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4042 if (netp) { 4043 *netp = net; 4044 } 4045 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4046 if (net->ro.ro_nh == NULL) { 4047 /* Since we have no route put it at the back */ 4048 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4049 } else if (netfirst == NULL) { 4050 /* We are the first one in the pool. */ 4051 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4052 } else if (netfirst->ro.ro_nh == NULL) { 4053 /* 4054 * First one has NO route. Place this one ahead of the first 4055 * one. 4056 */ 4057 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4058 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4059 /* 4060 * This one has a different interface than the one at the 4061 * top of the list. Place it ahead. 4062 */ 4063 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4064 } else { 4065 /* 4066 * Ok we have the same interface as the first one. Move 4067 * forward until we find either a) one with a NULL route... 4068 * insert ahead of that b) one with a different ifp.. insert 4069 * after that. c) end of the list.. insert at the tail. 4070 */ 4071 struct sctp_nets *netlook; 4072 4073 do { 4074 netlook = TAILQ_NEXT(netfirst, sctp_next); 4075 if (netlook == NULL) { 4076 /* End of the list */ 4077 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4078 break; 4079 } else if (netlook->ro.ro_nh == NULL) { 4080 /* next one has NO route */ 4081 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4082 break; 4083 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4084 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4085 net, sctp_next); 4086 break; 4087 } 4088 /* Shift forward */ 4089 netfirst = netlook; 4090 } while (netlook != NULL); 4091 } 4092 4093 /* got to have a primary set */ 4094 if (stcb->asoc.primary_destination == 0) { 4095 stcb->asoc.primary_destination = net; 4096 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4097 (net->ro.ro_nh) && 4098 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4099 /* No route to current primary adopt new primary */ 4100 stcb->asoc.primary_destination = net; 4101 } 4102 /* Validate primary is first */ 4103 net = TAILQ_FIRST(&stcb->asoc.nets); 4104 if ((net != stcb->asoc.primary_destination) && 4105 (stcb->asoc.primary_destination)) { 4106 /* 4107 * first one on the list is NOT the primary sctp_cmpaddr() 4108 * is much more efficient if the primary is the first on the 4109 * list, make it so. 4110 */ 4111 TAILQ_REMOVE(&stcb->asoc.nets, 4112 stcb->asoc.primary_destination, sctp_next); 4113 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4114 stcb->asoc.primary_destination, sctp_next); 4115 } 4116 return (0); 4117 } 4118 4119 static uint32_t 4120 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4121 { 4122 uint32_t id; 4123 struct sctpasochead *head; 4124 struct sctp_tcb *lstcb; 4125 4126 try_again: 4127 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4128 /* TSNH */ 4129 return (0); 4130 } 4131 /* 4132 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4133 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4134 */ 4135 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4136 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4137 } 4138 id = inp->sctp_associd_counter; 4139 inp->sctp_associd_counter++; 4140 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4141 if (lstcb) { 4142 goto try_again; 4143 } 4144 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4145 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4146 stcb->asoc.in_asocid_hash = 1; 4147 return (id); 4148 } 4149 4150 /* 4151 * allocate an association and add it to the endpoint. The caller must be 4152 * careful to add all additional addresses once they are know right away or 4153 * else the assoc will be may experience a blackout scenario. 4154 */ 4155 struct sctp_tcb * 4156 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4157 int *error, uint32_t override_tag, uint32_t vrf_id, 4158 uint16_t o_streams, uint16_t port, 4159 struct thread *p, 4160 int initialize_auth_params) 4161 { 4162 /* note the p argument is only valid in unbound sockets */ 4163 4164 struct sctp_tcb *stcb; 4165 struct sctp_association *asoc; 4166 struct sctpasochead *head; 4167 uint16_t rport; 4168 int err; 4169 4170 /* 4171 * Assumption made here: Caller has done a 4172 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4173 * address does not exist already. 4174 */ 4175 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4176 /* Hit max assoc, sorry no more */ 4177 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4178 *error = ENOBUFS; 4179 return (NULL); 4180 } 4181 if (firstaddr == NULL) { 4182 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4183 *error = EINVAL; 4184 return (NULL); 4185 } 4186 SCTP_INP_RLOCK(inp); 4187 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4188 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4189 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4190 /* 4191 * If its in the TCP pool, its NOT allowed to create an 4192 * association. The parent listener needs to call 4193 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4194 * off, or connected one does this.. its an error. 4195 */ 4196 SCTP_INP_RUNLOCK(inp); 4197 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4198 *error = EINVAL; 4199 return (NULL); 4200 } 4201 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4202 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4203 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4204 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4205 SCTP_INP_RUNLOCK(inp); 4206 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4207 *error = EINVAL; 4208 return (NULL); 4209 } 4210 } 4211 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4212 #ifdef SCTP_DEBUG 4213 if (firstaddr) { 4214 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4215 switch (firstaddr->sa_family) { 4216 #ifdef INET 4217 case AF_INET: 4218 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4219 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4220 break; 4221 #endif 4222 #ifdef INET6 4223 case AF_INET6: 4224 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4225 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4226 break; 4227 #endif 4228 default: 4229 break; 4230 } 4231 } else { 4232 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4233 } 4234 #endif /* SCTP_DEBUG */ 4235 switch (firstaddr->sa_family) { 4236 #ifdef INET 4237 case AF_INET: 4238 { 4239 struct sockaddr_in *sin; 4240 4241 sin = (struct sockaddr_in *)firstaddr; 4242 if ((ntohs(sin->sin_port) == 0) || 4243 (sin->sin_addr.s_addr == INADDR_ANY) || 4244 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4245 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) || 4246 (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) != 0) && 4247 (SCTP_IPV6_V6ONLY(inp) != 0))) { 4248 /* Invalid address */ 4249 SCTP_INP_RUNLOCK(inp); 4250 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4251 *error = EINVAL; 4252 return (NULL); 4253 } 4254 rport = sin->sin_port; 4255 break; 4256 } 4257 #endif 4258 #ifdef INET6 4259 case AF_INET6: 4260 { 4261 struct sockaddr_in6 *sin6; 4262 4263 sin6 = (struct sockaddr_in6 *)firstaddr; 4264 if ((ntohs(sin6->sin6_port) == 0) || 4265 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4266 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) || 4267 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) { 4268 /* Invalid address */ 4269 SCTP_INP_RUNLOCK(inp); 4270 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4271 *error = EINVAL; 4272 return (NULL); 4273 } 4274 rport = sin6->sin6_port; 4275 break; 4276 } 4277 #endif 4278 default: 4279 /* not supported family type */ 4280 SCTP_INP_RUNLOCK(inp); 4281 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4282 *error = EINVAL; 4283 return (NULL); 4284 } 4285 SCTP_INP_RUNLOCK(inp); 4286 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4287 /* 4288 * If you have not performed a bind, then we need to do the 4289 * ephemeral bind for you. 4290 */ 4291 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) { 4292 /* bind error, probably perm */ 4293 *error = err; 4294 return (NULL); 4295 } 4296 } 4297 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4298 if (stcb == NULL) { 4299 /* out of memory? */ 4300 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4301 *error = ENOMEM; 4302 return (NULL); 4303 } 4304 SCTP_INCR_ASOC_COUNT(); 4305 4306 memset(stcb, 0, sizeof(*stcb)); 4307 asoc = &stcb->asoc; 4308 4309 SCTP_TCB_LOCK_INIT(stcb); 4310 SCTP_TCB_SEND_LOCK_INIT(stcb); 4311 stcb->rport = rport; 4312 /* setup back pointer's */ 4313 stcb->sctp_ep = inp; 4314 stcb->sctp_socket = inp->sctp_socket; 4315 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4316 /* failed */ 4317 SCTP_TCB_LOCK_DESTROY(stcb); 4318 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4319 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4320 SCTP_DECR_ASOC_COUNT(); 4321 *error = err; 4322 return (NULL); 4323 } 4324 /* and the port */ 4325 SCTP_INP_INFO_WLOCK(); 4326 SCTP_INP_WLOCK(inp); 4327 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4328 /* inpcb freed while alloc going on */ 4329 SCTP_TCB_LOCK_DESTROY(stcb); 4330 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4331 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4332 SCTP_INP_WUNLOCK(inp); 4333 SCTP_INP_INFO_WUNLOCK(); 4334 SCTP_DECR_ASOC_COUNT(); 4335 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4336 *error = EINVAL; 4337 return (NULL); 4338 } 4339 SCTP_TCB_LOCK(stcb); 4340 4341 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4342 /* now that my_vtag is set, add it to the hash */ 4343 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4344 /* put it in the bucket in the vtag hash of assoc's for the system */ 4345 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4346 SCTP_INP_INFO_WUNLOCK(); 4347 4348 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4349 /* failure.. memory error? */ 4350 if (asoc->strmout) { 4351 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4352 asoc->strmout = NULL; 4353 } 4354 if (asoc->mapping_array) { 4355 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4356 asoc->mapping_array = NULL; 4357 } 4358 if (asoc->nr_mapping_array) { 4359 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4360 asoc->nr_mapping_array = NULL; 4361 } 4362 SCTP_DECR_ASOC_COUNT(); 4363 SCTP_TCB_UNLOCK(stcb); 4364 SCTP_TCB_LOCK_DESTROY(stcb); 4365 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4366 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4367 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4368 SCTP_INP_WUNLOCK(inp); 4369 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4370 *error = ENOBUFS; 4371 return (NULL); 4372 } 4373 /* Init all the timers */ 4374 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4375 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4376 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4377 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4378 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4379 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4380 4381 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4382 /* now file the port under the hash as well */ 4383 if (inp->sctp_tcbhash != NULL) { 4384 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4385 inp->sctp_hashmark)]; 4386 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4387 } 4388 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4389 sctp_initialize_auth_params(inp, stcb); 4390 } 4391 SCTP_INP_WUNLOCK(inp); 4392 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4393 return (stcb); 4394 } 4395 4396 void 4397 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4398 { 4399 struct sctp_inpcb *inp; 4400 struct sctp_association *asoc; 4401 4402 inp = stcb->sctp_ep; 4403 asoc = &stcb->asoc; 4404 asoc->numnets--; 4405 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4406 if (net == asoc->primary_destination) { 4407 /* Reset primary */ 4408 struct sctp_nets *lnet; 4409 4410 lnet = TAILQ_FIRST(&asoc->nets); 4411 /* 4412 * Mobility adaptation Ideally, if deleted destination is 4413 * the primary, it becomes a fast retransmission trigger by 4414 * the subsequent SET PRIMARY. (by micchie) 4415 */ 4416 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4417 SCTP_MOBILITY_BASE) || 4418 sctp_is_mobility_feature_on(stcb->sctp_ep, 4419 SCTP_MOBILITY_FASTHANDOFF)) { 4420 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4421 if (asoc->deleted_primary != NULL) { 4422 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4423 goto out; 4424 } 4425 asoc->deleted_primary = net; 4426 atomic_add_int(&net->ref_count, 1); 4427 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4428 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4429 sctp_mobility_feature_on(stcb->sctp_ep, 4430 SCTP_MOBILITY_PRIM_DELETED); 4431 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4432 stcb->sctp_ep, stcb, NULL); 4433 } 4434 out: 4435 /* Try to find a confirmed primary */ 4436 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4437 } 4438 if (net == asoc->last_data_chunk_from) { 4439 /* Reset primary */ 4440 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4441 } 4442 if (net == asoc->last_control_chunk_from) { 4443 /* Clear net */ 4444 asoc->last_control_chunk_from = NULL; 4445 } 4446 if (net == stcb->asoc.alternate) { 4447 sctp_free_remote_addr(stcb->asoc.alternate); 4448 stcb->asoc.alternate = NULL; 4449 } 4450 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4451 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4452 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4453 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4454 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4455 sctp_free_remote_addr(net); 4456 } 4457 4458 /* 4459 * remove a remote endpoint address from an association, it will fail if the 4460 * address does not exist. 4461 */ 4462 int 4463 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4464 { 4465 /* 4466 * Here we need to remove a remote address. This is quite simple, we 4467 * first find it in the list of address for the association 4468 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4469 * on that item. Note we do not allow it to be removed if there are 4470 * no other addresses. 4471 */ 4472 struct sctp_association *asoc; 4473 struct sctp_nets *net, *nnet; 4474 4475 asoc = &stcb->asoc; 4476 4477 /* locate the address */ 4478 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4479 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4480 continue; 4481 } 4482 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4483 remaddr)) { 4484 /* we found the guy */ 4485 if (asoc->numnets < 2) { 4486 /* Must have at LEAST two remote addresses */ 4487 return (-1); 4488 } else { 4489 sctp_remove_net(stcb, net); 4490 return (0); 4491 } 4492 } 4493 } 4494 /* not found. */ 4495 return (-2); 4496 } 4497 4498 void 4499 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4500 { 4501 struct sctpvtaghead *chain; 4502 struct sctp_tagblock *twait_block; 4503 int found = 0; 4504 int i; 4505 4506 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4507 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4508 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4509 if ((twait_block->vtag_block[i].v_tag == tag) && 4510 (twait_block->vtag_block[i].lport == lport) && 4511 (twait_block->vtag_block[i].rport == rport)) { 4512 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4513 twait_block->vtag_block[i].v_tag = 0; 4514 twait_block->vtag_block[i].lport = 0; 4515 twait_block->vtag_block[i].rport = 0; 4516 found = 1; 4517 break; 4518 } 4519 } 4520 if (found) 4521 break; 4522 } 4523 } 4524 4525 int 4526 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4527 { 4528 struct sctpvtaghead *chain; 4529 struct sctp_tagblock *twait_block; 4530 int found = 0; 4531 int i; 4532 4533 SCTP_INP_INFO_WLOCK(); 4534 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4535 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4536 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4537 if ((twait_block->vtag_block[i].v_tag == tag) && 4538 (twait_block->vtag_block[i].lport == lport) && 4539 (twait_block->vtag_block[i].rport == rport)) { 4540 found = 1; 4541 break; 4542 } 4543 } 4544 if (found) 4545 break; 4546 } 4547 SCTP_INP_INFO_WUNLOCK(); 4548 return (found); 4549 } 4550 4551 void 4552 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4553 { 4554 struct sctpvtaghead *chain; 4555 struct sctp_tagblock *twait_block; 4556 struct timeval now; 4557 int set, i; 4558 4559 if (time == 0) { 4560 /* Its disabled */ 4561 return; 4562 } 4563 (void)SCTP_GETTIME_TIMEVAL(&now); 4564 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4565 set = 0; 4566 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4567 /* Block(s) present, lets find space, and expire on the fly */ 4568 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4569 if ((twait_block->vtag_block[i].v_tag == 0) && 4570 !set) { 4571 twait_block->vtag_block[i].tv_sec_at_expire = 4572 now.tv_sec + time; 4573 twait_block->vtag_block[i].v_tag = tag; 4574 twait_block->vtag_block[i].lport = lport; 4575 twait_block->vtag_block[i].rport = rport; 4576 set = 1; 4577 } else if ((twait_block->vtag_block[i].v_tag) && 4578 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4579 /* Audit expires this guy */ 4580 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4581 twait_block->vtag_block[i].v_tag = 0; 4582 twait_block->vtag_block[i].lport = 0; 4583 twait_block->vtag_block[i].rport = 0; 4584 if (set == 0) { 4585 /* Reuse it for my new tag */ 4586 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4587 twait_block->vtag_block[i].v_tag = tag; 4588 twait_block->vtag_block[i].lport = lport; 4589 twait_block->vtag_block[i].rport = rport; 4590 set = 1; 4591 } 4592 } 4593 } 4594 if (set) { 4595 /* 4596 * We only do up to the block where we can place our 4597 * tag for audits 4598 */ 4599 break; 4600 } 4601 } 4602 /* Need to add a new block to chain */ 4603 if (!set) { 4604 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4605 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4606 if (twait_block == NULL) { 4607 return; 4608 } 4609 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4610 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4611 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4612 twait_block->vtag_block[0].v_tag = tag; 4613 twait_block->vtag_block[0].lport = lport; 4614 twait_block->vtag_block[0].rport = rport; 4615 } 4616 } 4617 4618 void 4619 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4620 { 4621 struct sctp_tmit_chunk *chk, *nchk; 4622 struct sctp_queued_to_read *control, *ncontrol; 4623 4624 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4625 TAILQ_REMOVE(rh, control, next_instrm); 4626 control->on_strm_q = 0; 4627 if (control->on_read_q == 0) { 4628 sctp_free_remote_addr(control->whoFrom); 4629 if (control->data) { 4630 sctp_m_freem(control->data); 4631 control->data = NULL; 4632 } 4633 } 4634 /* Reassembly free? */ 4635 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4636 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4637 if (chk->data) { 4638 sctp_m_freem(chk->data); 4639 chk->data = NULL; 4640 } 4641 if (chk->holds_key_ref) 4642 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4643 sctp_free_remote_addr(chk->whoTo); 4644 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4645 SCTP_DECR_CHK_COUNT(); 4646 /* sa_ignore FREED_MEMORY */ 4647 } 4648 /* 4649 * We don't free the address here since all the net's were 4650 * freed above. 4651 */ 4652 if (control->on_read_q == 0) { 4653 sctp_free_a_readq(stcb, control); 4654 } 4655 } 4656 } 4657 4658 /*- 4659 * Free the association after un-hashing the remote port. This 4660 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4661 * expect that the input to this function IS a locked TCB. 4662 * It will return 0, if it did NOT destroy the association (instead 4663 * it unlocks it. It will return NON-zero if it either destroyed the 4664 * association OR the association is already destroyed. 4665 */ 4666 int 4667 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4668 { 4669 int i; 4670 struct sctp_association *asoc; 4671 struct sctp_nets *net, *nnet; 4672 struct sctp_laddr *laddr, *naddr; 4673 struct sctp_tmit_chunk *chk, *nchk; 4674 struct sctp_asconf_addr *aparam, *naparam; 4675 struct sctp_asconf_ack *aack, *naack; 4676 struct sctp_stream_reset_list *strrst, *nstrrst; 4677 struct sctp_queued_to_read *sq, *nsq; 4678 struct sctp_stream_queue_pending *sp, *nsp; 4679 sctp_sharedkey_t *shared_key, *nshared_key; 4680 struct socket *so; 4681 4682 /* first, lets purge the entry from the hash table. */ 4683 4684 #ifdef SCTP_LOG_CLOSING 4685 sctp_log_closing(inp, stcb, 6); 4686 #endif 4687 if (stcb->asoc.state == 0) { 4688 #ifdef SCTP_LOG_CLOSING 4689 sctp_log_closing(inp, NULL, 7); 4690 #endif 4691 /* there is no asoc, really TSNH :-0 */ 4692 return (1); 4693 } 4694 SCTP_TCB_SEND_LOCK(stcb); 4695 if (stcb->asoc.alternate) { 4696 sctp_free_remote_addr(stcb->asoc.alternate); 4697 stcb->asoc.alternate = NULL; 4698 } 4699 /* TEMP CODE */ 4700 if (stcb->freed_from_where == 0) { 4701 /* Only record the first place free happened from */ 4702 stcb->freed_from_where = from_location; 4703 } 4704 /* TEMP CODE */ 4705 4706 asoc = &stcb->asoc; 4707 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4708 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4709 /* nothing around */ 4710 so = NULL; 4711 else 4712 so = inp->sctp_socket; 4713 4714 /* 4715 * We used timer based freeing if a reader or writer is in the way. 4716 * So we first check if we are actually being called from a timer, 4717 * if so we abort early if a reader or writer is still in the way. 4718 */ 4719 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4720 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4721 /* 4722 * is it the timer driving us? if so are the reader/writers 4723 * gone? 4724 */ 4725 if (stcb->asoc.refcnt) { 4726 /* nope, reader or writer in the way */ 4727 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4728 /* no asoc destroyed */ 4729 SCTP_TCB_SEND_UNLOCK(stcb); 4730 SCTP_TCB_UNLOCK(stcb); 4731 #ifdef SCTP_LOG_CLOSING 4732 sctp_log_closing(inp, stcb, 8); 4733 #endif 4734 return (0); 4735 } 4736 } 4737 /* Now clean up any other timers */ 4738 sctp_stop_association_timers(stcb, false); 4739 /* Now the read queue needs to be cleaned up (only once) */ 4740 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4741 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4742 SCTP_INP_READ_LOCK(inp); 4743 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4744 if (sq->stcb == stcb) { 4745 sq->do_not_ref_stcb = 1; 4746 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4747 /* 4748 * If there is no end, there never will be 4749 * now. 4750 */ 4751 if (sq->end_added == 0) { 4752 /* Held for PD-API clear that. */ 4753 sq->pdapi_aborted = 1; 4754 sq->held_length = 0; 4755 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4756 /* 4757 * Need to add a PD-API 4758 * aborted indication. 4759 * Setting the control_pdapi 4760 * assures that it will be 4761 * added right after this 4762 * msg. 4763 */ 4764 uint32_t strseq; 4765 4766 stcb->asoc.control_pdapi = sq; 4767 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4768 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4769 stcb, 4770 SCTP_PARTIAL_DELIVERY_ABORTED, 4771 (void *)&strseq, 4772 SCTP_SO_LOCKED); 4773 stcb->asoc.control_pdapi = NULL; 4774 } 4775 } 4776 /* Add an end to wake them */ 4777 sq->end_added = 1; 4778 } 4779 } 4780 SCTP_INP_READ_UNLOCK(inp); 4781 if (stcb->block_entry) { 4782 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4783 stcb->block_entry->error = ECONNRESET; 4784 stcb->block_entry = NULL; 4785 } 4786 } 4787 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4788 /* 4789 * Someone holds a reference OR the socket is unaccepted 4790 * yet. 4791 */ 4792 if ((stcb->asoc.refcnt) || 4793 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4794 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4795 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4796 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4797 } 4798 SCTP_TCB_SEND_UNLOCK(stcb); 4799 SCTP_TCB_UNLOCK(stcb); 4800 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4801 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4802 /* nothing around */ 4803 so = NULL; 4804 if (so) { 4805 /* Wake any reader/writers */ 4806 sctp_sorwakeup(inp, so); 4807 sctp_sowwakeup(inp, so); 4808 } 4809 4810 #ifdef SCTP_LOG_CLOSING 4811 sctp_log_closing(inp, stcb, 9); 4812 #endif 4813 /* no asoc destroyed */ 4814 return (0); 4815 } 4816 #ifdef SCTP_LOG_CLOSING 4817 sctp_log_closing(inp, stcb, 10); 4818 #endif 4819 /* 4820 * When I reach here, no others want to kill the assoc yet.. and I 4821 * own the lock. Now its possible an abort comes in when I do the 4822 * lock exchange below to grab all the locks to do the final take 4823 * out. to prevent this we increment the count, which will start a 4824 * timer and blow out above thus assuring us that we hold exclusive 4825 * killing of the asoc. Note that after getting back the TCB lock we 4826 * will go ahead and increment the counter back up and stop any 4827 * timer a passing stranger may have started :-S 4828 */ 4829 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4830 atomic_add_int(&stcb->asoc.refcnt, 1); 4831 4832 SCTP_TCB_SEND_UNLOCK(stcb); 4833 SCTP_TCB_UNLOCK(stcb); 4834 SCTP_INP_INFO_WLOCK(); 4835 SCTP_INP_WLOCK(inp); 4836 SCTP_TCB_LOCK(stcb); 4837 SCTP_TCB_SEND_LOCK(stcb); 4838 } 4839 /* Double check the GONE flag */ 4840 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4841 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4842 /* nothing around */ 4843 so = NULL; 4844 4845 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4846 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4847 /* 4848 * For TCP type we need special handling when we are 4849 * connected. We also include the peel'ed off ones to. 4850 */ 4851 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4852 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4853 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4854 if (so) { 4855 SOCKBUF_LOCK(&so->so_rcv); 4856 so->so_state &= ~(SS_ISCONNECTING | 4857 SS_ISDISCONNECTING | 4858 SS_ISCONFIRMING | 4859 SS_ISCONNECTED); 4860 so->so_state |= SS_ISDISCONNECTED; 4861 socantrcvmore_locked(so); 4862 socantsendmore(so); 4863 sctp_sowwakeup(inp, so); 4864 sctp_sorwakeup(inp, so); 4865 SCTP_SOWAKEUP(so); 4866 } 4867 } 4868 } 4869 4870 /* 4871 * Make it invalid too, that way if its about to run it will abort 4872 * and return. 4873 */ 4874 /* re-increment the lock */ 4875 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4876 atomic_add_int(&stcb->asoc.refcnt, -1); 4877 } 4878 if (stcb->asoc.refcnt) { 4879 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4880 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4881 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4882 SCTP_INP_INFO_WUNLOCK(); 4883 SCTP_INP_WUNLOCK(inp); 4884 } 4885 SCTP_TCB_SEND_UNLOCK(stcb); 4886 SCTP_TCB_UNLOCK(stcb); 4887 return (0); 4888 } 4889 asoc->state = 0; 4890 if (inp->sctp_tcbhash) { 4891 LIST_REMOVE(stcb, sctp_tcbhash); 4892 } 4893 if (stcb->asoc.in_asocid_hash) { 4894 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4895 } 4896 /* Now lets remove it from the list of ALL associations in the EP */ 4897 LIST_REMOVE(stcb, sctp_tcblist); 4898 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4899 SCTP_INP_INCR_REF(inp); 4900 SCTP_INP_WUNLOCK(inp); 4901 } 4902 /* pull from vtag hash */ 4903 LIST_REMOVE(stcb, sctp_asocs); 4904 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4905 inp->sctp_lport, stcb->rport); 4906 4907 /* 4908 * Now restop the timers to be sure this is paranoia at is finest! 4909 */ 4910 sctp_stop_association_timers(stcb, true); 4911 4912 /* 4913 * The chunk lists and such SHOULD be empty but we check them just 4914 * in case. 4915 */ 4916 /* anything on the wheel needs to be removed */ 4917 for (i = 0; i < asoc->streamoutcnt; i++) { 4918 struct sctp_stream_out *outs; 4919 4920 outs = &asoc->strmout[i]; 4921 /* now clean up any chunks here */ 4922 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4923 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4924 TAILQ_REMOVE(&outs->outqueue, sp, next); 4925 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1); 4926 sctp_free_spbufspace(stcb, asoc, sp); 4927 if (sp->data) { 4928 if (so) { 4929 /* Still an open socket - report */ 4930 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4931 0, (void *)sp, SCTP_SO_LOCKED); 4932 } 4933 if (sp->data) { 4934 sctp_m_freem(sp->data); 4935 sp->data = NULL; 4936 sp->tail_mbuf = NULL; 4937 sp->length = 0; 4938 } 4939 } 4940 if (sp->net) { 4941 sctp_free_remote_addr(sp->net); 4942 sp->net = NULL; 4943 } 4944 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4945 } 4946 } 4947 /* sa_ignore FREED_MEMORY */ 4948 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4949 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4950 SCTP_FREE(strrst, SCTP_M_STRESET); 4951 } 4952 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4953 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4954 if (sq->data) { 4955 sctp_m_freem(sq->data); 4956 sq->data = NULL; 4957 } 4958 sctp_free_remote_addr(sq->whoFrom); 4959 sq->whoFrom = NULL; 4960 sq->stcb = NULL; 4961 /* Free the ctl entry */ 4962 sctp_free_a_readq(stcb, sq); 4963 /* sa_ignore FREED_MEMORY */ 4964 } 4965 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4966 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4967 if (chk->data) { 4968 sctp_m_freem(chk->data); 4969 chk->data = NULL; 4970 } 4971 if (chk->holds_key_ref) 4972 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4973 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4974 SCTP_DECR_CHK_COUNT(); 4975 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4976 asoc->free_chunk_cnt--; 4977 /* sa_ignore FREED_MEMORY */ 4978 } 4979 /* pending send queue SHOULD be empty */ 4980 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4981 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 4982 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 4983 #ifdef INVARIANTS 4984 } else { 4985 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 4986 #endif 4987 } 4988 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4989 if (chk->data) { 4990 if (so) { 4991 /* Still a socket? */ 4992 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4993 0, chk, SCTP_SO_LOCKED); 4994 } 4995 if (chk->data) { 4996 sctp_m_freem(chk->data); 4997 chk->data = NULL; 4998 } 4999 } 5000 if (chk->holds_key_ref) 5001 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5002 if (chk->whoTo) { 5003 sctp_free_remote_addr(chk->whoTo); 5004 chk->whoTo = NULL; 5005 } 5006 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5007 SCTP_DECR_CHK_COUNT(); 5008 /* sa_ignore FREED_MEMORY */ 5009 } 5010 /* sent queue SHOULD be empty */ 5011 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5012 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5013 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5014 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5015 #ifdef INVARIANTS 5016 } else { 5017 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5018 #endif 5019 } 5020 } 5021 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5022 if (chk->data) { 5023 if (so) { 5024 /* Still a socket? */ 5025 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5026 0, chk, SCTP_SO_LOCKED); 5027 } 5028 if (chk->data) { 5029 sctp_m_freem(chk->data); 5030 chk->data = NULL; 5031 } 5032 } 5033 if (chk->holds_key_ref) 5034 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5035 sctp_free_remote_addr(chk->whoTo); 5036 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5037 SCTP_DECR_CHK_COUNT(); 5038 /* sa_ignore FREED_MEMORY */ 5039 } 5040 #ifdef INVARIANTS 5041 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5042 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5043 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5044 } 5045 } 5046 #endif 5047 /* control queue MAY not be empty */ 5048 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5049 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5050 if (chk->data) { 5051 sctp_m_freem(chk->data); 5052 chk->data = NULL; 5053 } 5054 if (chk->holds_key_ref) 5055 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5056 sctp_free_remote_addr(chk->whoTo); 5057 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5058 SCTP_DECR_CHK_COUNT(); 5059 /* sa_ignore FREED_MEMORY */ 5060 } 5061 /* ASCONF queue MAY not be empty */ 5062 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5063 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5064 if (chk->data) { 5065 sctp_m_freem(chk->data); 5066 chk->data = NULL; 5067 } 5068 if (chk->holds_key_ref) 5069 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5070 sctp_free_remote_addr(chk->whoTo); 5071 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5072 SCTP_DECR_CHK_COUNT(); 5073 /* sa_ignore FREED_MEMORY */ 5074 } 5075 if (asoc->mapping_array) { 5076 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5077 asoc->mapping_array = NULL; 5078 } 5079 if (asoc->nr_mapping_array) { 5080 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5081 asoc->nr_mapping_array = NULL; 5082 } 5083 /* the stream outs */ 5084 if (asoc->strmout) { 5085 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5086 asoc->strmout = NULL; 5087 } 5088 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5089 if (asoc->strmin) { 5090 for (i = 0; i < asoc->streamincnt; i++) { 5091 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5092 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5093 } 5094 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5095 asoc->strmin = NULL; 5096 } 5097 asoc->streamincnt = 0; 5098 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5099 #ifdef INVARIANTS 5100 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5101 panic("no net's left alloc'ed, or list points to itself"); 5102 } 5103 #endif 5104 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5105 sctp_free_remote_addr(net); 5106 } 5107 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5108 /* sa_ignore FREED_MEMORY */ 5109 sctp_remove_laddr(laddr); 5110 } 5111 5112 /* pending asconf (address) parameters */ 5113 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5114 /* sa_ignore FREED_MEMORY */ 5115 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5116 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5117 } 5118 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5119 /* sa_ignore FREED_MEMORY */ 5120 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5121 if (aack->data != NULL) { 5122 sctp_m_freem(aack->data); 5123 } 5124 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5125 } 5126 /* clean up auth stuff */ 5127 if (asoc->local_hmacs) 5128 sctp_free_hmaclist(asoc->local_hmacs); 5129 if (asoc->peer_hmacs) 5130 sctp_free_hmaclist(asoc->peer_hmacs); 5131 5132 if (asoc->local_auth_chunks) 5133 sctp_free_chunklist(asoc->local_auth_chunks); 5134 if (asoc->peer_auth_chunks) 5135 sctp_free_chunklist(asoc->peer_auth_chunks); 5136 5137 sctp_free_authinfo(&asoc->authinfo); 5138 5139 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5140 LIST_REMOVE(shared_key, next); 5141 sctp_free_sharedkey(shared_key); 5142 /* sa_ignore FREED_MEMORY */ 5143 } 5144 5145 /* Insert new items here :> */ 5146 5147 /* Get rid of LOCK */ 5148 SCTP_TCB_SEND_UNLOCK(stcb); 5149 SCTP_TCB_UNLOCK(stcb); 5150 SCTP_TCB_LOCK_DESTROY(stcb); 5151 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5152 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5153 SCTP_INP_INFO_WUNLOCK(); 5154 SCTP_INP_RLOCK(inp); 5155 } 5156 #ifdef SCTP_TRACK_FREED_ASOCS 5157 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5158 /* now clean up the tasoc itself */ 5159 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5160 SCTP_DECR_ASOC_COUNT(); 5161 } else { 5162 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5163 } 5164 #else 5165 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5166 SCTP_DECR_ASOC_COUNT(); 5167 #endif 5168 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5169 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5170 /* 5171 * If its NOT the inp_free calling us AND sctp_close 5172 * as been called, we call back... 5173 */ 5174 SCTP_INP_RUNLOCK(inp); 5175 /* 5176 * This will start the kill timer (if we are the 5177 * last one) since we hold an increment yet. But 5178 * this is the only safe way to do this since 5179 * otherwise if the socket closes at the same time 5180 * we are here we might collide in the cleanup. 5181 */ 5182 sctp_inpcb_free(inp, 5183 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5184 SCTP_CALLED_DIRECTLY_NOCMPSET); 5185 SCTP_INP_DECR_REF(inp); 5186 } else { 5187 /* The socket is still open. */ 5188 SCTP_INP_DECR_REF(inp); 5189 SCTP_INP_RUNLOCK(inp); 5190 } 5191 } 5192 /* destroyed the asoc */ 5193 #ifdef SCTP_LOG_CLOSING 5194 sctp_log_closing(inp, NULL, 11); 5195 #endif 5196 return (1); 5197 } 5198 5199 /* 5200 * determine if a destination is "reachable" based upon the addresses bound 5201 * to the current endpoint (e.g. only v4 or v6 currently bound) 5202 */ 5203 /* 5204 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5205 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5206 * types bound as its endpoint 5207 */ 5208 int 5209 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5210 { 5211 struct sctp_inpcb *inp; 5212 int answer; 5213 5214 /* 5215 * No locks here, the TCB, in all cases is already locked and an 5216 * assoc is up. There is either a INP lock by the caller applied (in 5217 * asconf case when deleting an address) or NOT in the HB case, 5218 * however if HB then the INP increment is up and the INP will not 5219 * be removed (on top of the fact that we have a TCB lock). So we 5220 * only want to read the sctp_flags, which is either bound-all or 5221 * not.. no protection needed since once an assoc is up you can't be 5222 * changing your binding. 5223 */ 5224 inp = stcb->sctp_ep; 5225 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5226 /* if bound all, destination is not restricted */ 5227 /* 5228 * RRS: Question during lock work: Is this correct? If you 5229 * are bound-all you still might need to obey the V4--V6 5230 * flags??? IMO this bound-all stuff needs to be removed! 5231 */ 5232 return (1); 5233 } 5234 /* NOTE: all "scope" checks are done when local addresses are added */ 5235 switch (destaddr->sa_family) { 5236 #ifdef INET6 5237 case AF_INET6: 5238 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5239 break; 5240 #endif 5241 #ifdef INET 5242 case AF_INET: 5243 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5244 break; 5245 #endif 5246 default: 5247 /* invalid family, so it's unreachable */ 5248 answer = 0; 5249 break; 5250 } 5251 return (answer); 5252 } 5253 5254 /* 5255 * update the inp_vflags on an endpoint 5256 */ 5257 static void 5258 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5259 { 5260 struct sctp_laddr *laddr; 5261 5262 /* first clear the flag */ 5263 inp->ip_inp.inp.inp_vflag = 0; 5264 /* set the flag based on addresses on the ep list */ 5265 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5266 if (laddr->ifa == NULL) { 5267 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5268 __func__); 5269 continue; 5270 } 5271 5272 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5273 continue; 5274 } 5275 switch (laddr->ifa->address.sa.sa_family) { 5276 #ifdef INET6 5277 case AF_INET6: 5278 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5279 break; 5280 #endif 5281 #ifdef INET 5282 case AF_INET: 5283 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5284 break; 5285 #endif 5286 default: 5287 break; 5288 } 5289 } 5290 } 5291 5292 /* 5293 * Add the address to the endpoint local address list There is nothing to be 5294 * done if we are bound to all addresses 5295 */ 5296 void 5297 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5298 { 5299 struct sctp_laddr *laddr; 5300 struct sctp_tcb *stcb; 5301 int fnd, error = 0; 5302 5303 fnd = 0; 5304 5305 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5306 /* You are already bound to all. You have it already */ 5307 return; 5308 } 5309 #ifdef INET6 5310 if (ifa->address.sa.sa_family == AF_INET6) { 5311 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5312 /* Can't bind a non-useable addr. */ 5313 return; 5314 } 5315 } 5316 #endif 5317 /* first, is it already present? */ 5318 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5319 if (laddr->ifa == ifa) { 5320 fnd = 1; 5321 break; 5322 } 5323 } 5324 5325 if (fnd == 0) { 5326 /* Not in the ep list */ 5327 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5328 if (error != 0) 5329 return; 5330 inp->laddr_count++; 5331 /* update inp_vflag flags */ 5332 switch (ifa->address.sa.sa_family) { 5333 #ifdef INET6 5334 case AF_INET6: 5335 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5336 break; 5337 #endif 5338 #ifdef INET 5339 case AF_INET: 5340 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5341 break; 5342 #endif 5343 default: 5344 break; 5345 } 5346 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5347 sctp_add_local_addr_restricted(stcb, ifa); 5348 } 5349 } 5350 return; 5351 } 5352 5353 /* 5354 * select a new (hopefully reachable) destination net (should only be used 5355 * when we deleted an ep addr that is the only usable source address to reach 5356 * the destination net) 5357 */ 5358 static void 5359 sctp_select_primary_destination(struct sctp_tcb *stcb) 5360 { 5361 struct sctp_nets *net; 5362 5363 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5364 /* for now, we'll just pick the first reachable one we find */ 5365 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5366 continue; 5367 if (sctp_destination_is_reachable(stcb, 5368 (struct sockaddr *)&net->ro._l_addr)) { 5369 /* found a reachable destination */ 5370 stcb->asoc.primary_destination = net; 5371 } 5372 } 5373 /* I can't there from here! ...we're gonna die shortly... */ 5374 } 5375 5376 /* 5377 * Delete the address from the endpoint local address list. There is nothing 5378 * to be done if we are bound to all addresses 5379 */ 5380 void 5381 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5382 { 5383 struct sctp_laddr *laddr; 5384 int fnd; 5385 5386 fnd = 0; 5387 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5388 /* You are already bound to all. You have it already */ 5389 return; 5390 } 5391 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5392 if (laddr->ifa == ifa) { 5393 fnd = 1; 5394 break; 5395 } 5396 } 5397 if (fnd && (inp->laddr_count < 2)) { 5398 /* can't delete unless there are at LEAST 2 addresses */ 5399 return; 5400 } 5401 if (fnd) { 5402 /* 5403 * clean up any use of this address go through our 5404 * associations and clear any last_used_address that match 5405 * this one for each assoc, see if a new primary_destination 5406 * is needed 5407 */ 5408 struct sctp_tcb *stcb; 5409 5410 /* clean up "next_addr_touse" */ 5411 if (inp->next_addr_touse == laddr) 5412 /* delete this address */ 5413 inp->next_addr_touse = NULL; 5414 5415 /* clean up "last_used_address" */ 5416 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5417 struct sctp_nets *net; 5418 5419 SCTP_TCB_LOCK(stcb); 5420 if (stcb->asoc.last_used_address == laddr) 5421 /* delete this address */ 5422 stcb->asoc.last_used_address = NULL; 5423 /* 5424 * Now spin through all the nets and purge any ref 5425 * to laddr 5426 */ 5427 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5428 if (net->ro._s_addr == laddr->ifa) { 5429 /* Yep, purge src address selected */ 5430 RO_NHFREE(&net->ro); 5431 sctp_free_ifa(net->ro._s_addr); 5432 net->ro._s_addr = NULL; 5433 net->src_addr_selected = 0; 5434 } 5435 } 5436 SCTP_TCB_UNLOCK(stcb); 5437 } /* for each tcb */ 5438 /* remove it from the ep list */ 5439 sctp_remove_laddr(laddr); 5440 inp->laddr_count--; 5441 /* update inp_vflag flags */ 5442 sctp_update_ep_vflag(inp); 5443 } 5444 return; 5445 } 5446 5447 /* 5448 * Add the address to the TCB local address restricted list. 5449 * This is a "pending" address list (eg. addresses waiting for an 5450 * ASCONF-ACK response) and cannot be used as a valid source address. 5451 */ 5452 void 5453 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5454 { 5455 struct sctp_laddr *laddr; 5456 struct sctpladdr *list; 5457 5458 /* 5459 * Assumes TCB is locked.. and possibly the INP. May need to 5460 * confirm/fix that if we need it and is not the case. 5461 */ 5462 list = &stcb->asoc.sctp_restricted_addrs; 5463 5464 #ifdef INET6 5465 if (ifa->address.sa.sa_family == AF_INET6) { 5466 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5467 /* Can't bind a non-existent addr. */ 5468 return; 5469 } 5470 } 5471 #endif 5472 /* does the address already exist? */ 5473 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5474 if (laddr->ifa == ifa) { 5475 return; 5476 } 5477 } 5478 5479 /* add to the list */ 5480 (void)sctp_insert_laddr(list, ifa, 0); 5481 return; 5482 } 5483 5484 /* 5485 * Remove a local address from the TCB local address restricted list 5486 */ 5487 void 5488 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5489 { 5490 struct sctp_inpcb *inp; 5491 struct sctp_laddr *laddr; 5492 5493 /* 5494 * This is called by asconf work. It is assumed that a) The TCB is 5495 * locked and b) The INP is locked. This is true in as much as I can 5496 * trace through the entry asconf code where I did these locks. 5497 * Again, the ASCONF code is a bit different in that it does lock 5498 * the INP during its work often times. This must be since we don't 5499 * want other proc's looking up things while what they are looking 5500 * up is changing :-D 5501 */ 5502 5503 inp = stcb->sctp_ep; 5504 /* if subset bound and don't allow ASCONF's, can't delete last */ 5505 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5506 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5507 if (stcb->sctp_ep->laddr_count < 2) { 5508 /* can't delete last address */ 5509 return; 5510 } 5511 } 5512 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5513 /* remove the address if it exists */ 5514 if (laddr->ifa == NULL) 5515 continue; 5516 if (laddr->ifa == ifa) { 5517 sctp_remove_laddr(laddr); 5518 return; 5519 } 5520 } 5521 5522 /* address not found! */ 5523 return; 5524 } 5525 5526 /* sysctl */ 5527 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5528 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5529 5530 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5531 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5532 int *sctp_cpuarry = NULL; 5533 5534 void 5535 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5536 { 5537 /* Queue a packet to a processor for the specified core */ 5538 struct sctp_mcore_queue *qent; 5539 struct sctp_mcore_ctrl *wkq; 5540 int need_wake = 0; 5541 5542 if (sctp_mcore_workers == NULL) { 5543 /* Something went way bad during setup */ 5544 sctp_input_with_port(m, off, 0); 5545 return; 5546 } 5547 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5548 (sizeof(struct sctp_mcore_queue)), 5549 SCTP_M_MCORE); 5550 if (qent == NULL) { 5551 /* This is trouble */ 5552 sctp_input_with_port(m, off, 0); 5553 return; 5554 } 5555 qent->vn = curvnet; 5556 qent->m = m; 5557 qent->off = off; 5558 qent->v6 = 0; 5559 wkq = &sctp_mcore_workers[cpu_to_use]; 5560 SCTP_MCORE_QLOCK(wkq); 5561 5562 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5563 if (wkq->running == 0) { 5564 need_wake = 1; 5565 } 5566 SCTP_MCORE_QUNLOCK(wkq); 5567 if (need_wake) { 5568 wakeup(&wkq->running); 5569 } 5570 } 5571 5572 static void 5573 sctp_mcore_thread(void *arg) 5574 { 5575 5576 struct sctp_mcore_ctrl *wkq; 5577 struct sctp_mcore_queue *qent; 5578 5579 wkq = (struct sctp_mcore_ctrl *)arg; 5580 struct mbuf *m; 5581 int off, v6; 5582 5583 /* Wait for first tickle */ 5584 SCTP_MCORE_LOCK(wkq); 5585 wkq->running = 0; 5586 msleep(&wkq->running, 5587 &wkq->core_mtx, 5588 0, "wait for pkt", 0); 5589 SCTP_MCORE_UNLOCK(wkq); 5590 5591 /* Bind to our cpu */ 5592 thread_lock(curthread); 5593 sched_bind(curthread, wkq->cpuid); 5594 thread_unlock(curthread); 5595 5596 /* Now lets start working */ 5597 SCTP_MCORE_LOCK(wkq); 5598 /* Now grab lock and go */ 5599 for (;;) { 5600 SCTP_MCORE_QLOCK(wkq); 5601 skip_sleep: 5602 wkq->running = 1; 5603 qent = TAILQ_FIRST(&wkq->que); 5604 if (qent) { 5605 TAILQ_REMOVE(&wkq->que, qent, next); 5606 SCTP_MCORE_QUNLOCK(wkq); 5607 CURVNET_SET(qent->vn); 5608 m = qent->m; 5609 off = qent->off; 5610 v6 = qent->v6; 5611 SCTP_FREE(qent, SCTP_M_MCORE); 5612 if (v6 == 0) { 5613 sctp_input_with_port(m, off, 0); 5614 } else { 5615 SCTP_PRINTF("V6 not yet supported\n"); 5616 sctp_m_freem(m); 5617 } 5618 CURVNET_RESTORE(); 5619 SCTP_MCORE_QLOCK(wkq); 5620 } 5621 wkq->running = 0; 5622 if (!TAILQ_EMPTY(&wkq->que)) { 5623 goto skip_sleep; 5624 } 5625 SCTP_MCORE_QUNLOCK(wkq); 5626 msleep(&wkq->running, 5627 &wkq->core_mtx, 5628 0, "wait for pkt", 0); 5629 } 5630 } 5631 5632 static void 5633 sctp_startup_mcore_threads(void) 5634 { 5635 int i, cpu; 5636 5637 if (mp_ncpus == 1) 5638 return; 5639 5640 if (sctp_mcore_workers != NULL) { 5641 /* 5642 * Already been here in some previous vnet? 5643 */ 5644 return; 5645 } 5646 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5647 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5648 SCTP_M_MCORE); 5649 if (sctp_mcore_workers == NULL) { 5650 /* TSNH I hope */ 5651 return; 5652 } 5653 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5654 sizeof(struct sctp_mcore_ctrl))); 5655 /* Init the structures */ 5656 for (i = 0; i <= mp_maxid; i++) { 5657 TAILQ_INIT(&sctp_mcore_workers[i].que); 5658 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5659 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5660 sctp_mcore_workers[i].cpuid = i; 5661 } 5662 if (sctp_cpuarry == NULL) { 5663 SCTP_MALLOC(sctp_cpuarry, int *, 5664 (mp_ncpus * sizeof(int)), 5665 SCTP_M_MCORE); 5666 i = 0; 5667 CPU_FOREACH(cpu) { 5668 sctp_cpuarry[i] = cpu; 5669 i++; 5670 } 5671 } 5672 /* Now start them all */ 5673 CPU_FOREACH(cpu) { 5674 (void)kproc_create(sctp_mcore_thread, 5675 (void *)&sctp_mcore_workers[cpu], 5676 &sctp_mcore_workers[cpu].thread_proc, 5677 RFPROC, 5678 SCTP_KTHREAD_PAGES, 5679 SCTP_MCORE_NAME); 5680 } 5681 } 5682 #endif 5683 5684 void 5685 sctp_pcb_init(void) 5686 { 5687 /* 5688 * SCTP initialization for the PCB structures should be called by 5689 * the sctp_init() function. 5690 */ 5691 int i; 5692 struct timeval tv; 5693 5694 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5695 /* error I was called twice */ 5696 return; 5697 } 5698 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5699 5700 #if defined(SCTP_LOCAL_TRACE_BUF) 5701 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5702 #endif 5703 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5704 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5705 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5706 SCTP_M_MCORE); 5707 #endif 5708 (void)SCTP_GETTIME_TIMEVAL(&tv); 5709 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5710 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5711 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5712 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5713 #else 5714 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5715 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5716 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5717 #endif 5718 /* init the empty list of (All) Endpoints */ 5719 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5720 5721 /* init the hash table of endpoints */ 5722 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5723 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5724 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5725 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5726 &SCTP_BASE_INFO(hashasocmark)); 5727 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5728 &SCTP_BASE_INFO(hashmark)); 5729 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5730 &SCTP_BASE_INFO(hashtcpmark)); 5731 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5732 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5733 &SCTP_BASE_INFO(hashvrfmark)); 5734 5735 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5736 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5737 /* init the zones */ 5738 /* 5739 * FIX ME: Should check for NULL returns, but if it does fail we are 5740 * doomed to panic anyways... add later maybe. 5741 */ 5742 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5743 sizeof(struct sctp_inpcb), maxsockets); 5744 5745 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5746 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5747 5748 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5749 sizeof(struct sctp_laddr), 5750 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5751 5752 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5753 sizeof(struct sctp_nets), 5754 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5755 5756 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5757 sizeof(struct sctp_tmit_chunk), 5758 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5759 5760 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5761 sizeof(struct sctp_queued_to_read), 5762 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5763 5764 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5765 sizeof(struct sctp_stream_queue_pending), 5766 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5767 5768 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5769 sizeof(struct sctp_asconf), 5770 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5771 5772 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5773 sizeof(struct sctp_asconf_ack), 5774 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5775 5776 /* Master Lock INIT for info structure */ 5777 SCTP_INP_INFO_LOCK_INIT(); 5778 SCTP_STATLOG_INIT_LOCK(); 5779 5780 SCTP_IPI_COUNT_INIT(); 5781 SCTP_IPI_ADDR_INIT(); 5782 #ifdef SCTP_PACKET_LOGGING 5783 SCTP_IP_PKTLOG_INIT(); 5784 #endif 5785 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5786 5787 SCTP_WQ_ADDR_INIT(); 5788 /* not sure if we need all the counts */ 5789 SCTP_BASE_INFO(ipi_count_ep) = 0; 5790 /* assoc/tcb zone info */ 5791 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5792 /* local addrlist zone info */ 5793 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5794 /* remote addrlist zone info */ 5795 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5796 /* chunk info */ 5797 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5798 5799 /* socket queue zone info */ 5800 SCTP_BASE_INFO(ipi_count_readq) = 0; 5801 5802 /* stream out queue cont */ 5803 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5804 5805 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5806 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5807 5808 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5809 5810 /* Init the TIMEWAIT list */ 5811 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5812 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5813 } 5814 sctp_startup_iterator(); 5815 5816 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5817 sctp_startup_mcore_threads(); 5818 #endif 5819 5820 /* 5821 * INIT the default VRF which for BSD is the only one, other O/S's 5822 * may have more. But initially they must start with one and then 5823 * add the VRF's as addresses are added. 5824 */ 5825 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5826 } 5827 5828 /* 5829 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5830 */ 5831 void 5832 sctp_pcb_finish(void) 5833 { 5834 struct sctp_vrflist *vrf_bucket; 5835 struct sctp_vrf *vrf, *nvrf; 5836 struct sctp_ifn *ifn, *nifn; 5837 struct sctp_ifa *ifa, *nifa; 5838 struct sctpvtaghead *chain; 5839 struct sctp_tagblock *twait_block, *prev_twait_block; 5840 struct sctp_laddr *wi, *nwi; 5841 int i; 5842 struct sctp_iterator *it, *nit; 5843 5844 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5845 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5846 return; 5847 } 5848 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5849 /* 5850 * In FreeBSD the iterator thread never exits but we do clean up. 5851 * The only way FreeBSD reaches here is if we have VRF's but we 5852 * still add the ifdef to make it compile on old versions. 5853 */ 5854 retry: 5855 SCTP_IPI_ITERATOR_WQ_LOCK(); 5856 /* 5857 * sctp_iterator_worker() might be working on an it entry without 5858 * holding the lock. We won't find it on the list either and 5859 * continue and free/destroy it. While holding the lock, spin, to 5860 * avoid the race condition as sctp_iterator_worker() will have to 5861 * wait to re-acquire the lock. 5862 */ 5863 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5864 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5865 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5866 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5867 DELAY(10); 5868 goto retry; 5869 } 5870 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5871 if (it->vn != curvnet) { 5872 continue; 5873 } 5874 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5875 if (it->function_atend != NULL) { 5876 (*it->function_atend) (it->pointer, it->val); 5877 } 5878 SCTP_FREE(it, SCTP_M_ITER); 5879 } 5880 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5881 SCTP_ITERATOR_LOCK(); 5882 if ((sctp_it_ctl.cur_it) && 5883 (sctp_it_ctl.cur_it->vn == curvnet)) { 5884 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5885 } 5886 SCTP_ITERATOR_UNLOCK(); 5887 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5888 SCTP_WQ_ADDR_LOCK(); 5889 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5890 LIST_REMOVE(wi, sctp_nxt_addr); 5891 SCTP_DECR_LADDR_COUNT(); 5892 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5893 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5894 } 5895 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5896 } 5897 SCTP_WQ_ADDR_UNLOCK(); 5898 5899 /* 5900 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5901 * destroyed first). 5902 */ 5903 SCTP_IPI_ADDR_WLOCK(); 5904 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5905 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5906 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5907 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5908 /* free the ifa */ 5909 LIST_REMOVE(ifa, next_bucket); 5910 LIST_REMOVE(ifa, next_ifa); 5911 SCTP_FREE(ifa, SCTP_M_IFA); 5912 } 5913 /* free the ifn */ 5914 LIST_REMOVE(ifn, next_bucket); 5915 LIST_REMOVE(ifn, next_ifn); 5916 SCTP_FREE(ifn, SCTP_M_IFN); 5917 } 5918 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5919 /* free the vrf */ 5920 LIST_REMOVE(vrf, next_vrf); 5921 SCTP_FREE(vrf, SCTP_M_VRF); 5922 } 5923 SCTP_IPI_ADDR_WUNLOCK(); 5924 /* free the vrf hashes */ 5925 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5926 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5927 5928 /* 5929 * free the TIMEWAIT list elements malloc'd in the function 5930 * sctp_add_vtag_to_timewait()... 5931 */ 5932 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5933 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5934 if (!LIST_EMPTY(chain)) { 5935 prev_twait_block = NULL; 5936 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5937 if (prev_twait_block) { 5938 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5939 } 5940 prev_twait_block = twait_block; 5941 } 5942 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5943 } 5944 } 5945 5946 /* free the locks and mutexes */ 5947 #ifdef SCTP_PACKET_LOGGING 5948 SCTP_IP_PKTLOG_DESTROY(); 5949 #endif 5950 SCTP_IPI_ADDR_DESTROY(); 5951 SCTP_STATLOG_DESTROY(); 5952 SCTP_INP_INFO_LOCK_DESTROY(); 5953 5954 SCTP_WQ_ADDR_DESTROY(); 5955 5956 /* Get rid of other stuff too. */ 5957 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5958 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5959 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5960 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5961 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5962 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5963 5964 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5965 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5966 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5967 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5968 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5969 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5970 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5971 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5972 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5973 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5974 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5975 #endif 5976 } 5977 5978 int 5979 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5980 int offset, int limit, 5981 struct sockaddr *src, struct sockaddr *dst, 5982 struct sockaddr *altsa, uint16_t port) 5983 { 5984 /* 5985 * grub through the INIT pulling addresses and loading them to the 5986 * nets structure in the asoc. The from address in the mbuf should 5987 * also be loaded (if it is not already). This routine can be called 5988 * with either INIT or INIT-ACK's as long as the m points to the IP 5989 * packet and the offset points to the beginning of the parameters. 5990 */ 5991 struct sctp_inpcb *inp; 5992 struct sctp_nets *net, *nnet, *net_tmp; 5993 struct sctp_paramhdr *phdr, param_buf; 5994 struct sctp_tcb *stcb_tmp; 5995 uint16_t ptype, plen; 5996 struct sockaddr *sa; 5997 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5998 struct sctp_auth_random *p_random = NULL; 5999 uint16_t random_len = 0; 6000 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6001 struct sctp_auth_hmac_algo *hmacs = NULL; 6002 uint16_t hmacs_len = 0; 6003 uint8_t saw_asconf = 0; 6004 uint8_t saw_asconf_ack = 0; 6005 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6006 struct sctp_auth_chunk_list *chunks = NULL; 6007 uint16_t num_chunks = 0; 6008 sctp_key_t *new_key; 6009 uint32_t keylen; 6010 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6011 uint8_t peer_supports_ecn; 6012 uint8_t peer_supports_prsctp; 6013 uint8_t peer_supports_auth; 6014 uint8_t peer_supports_asconf; 6015 uint8_t peer_supports_asconf_ack; 6016 uint8_t peer_supports_reconfig; 6017 uint8_t peer_supports_nrsack; 6018 uint8_t peer_supports_pktdrop; 6019 uint8_t peer_supports_idata; 6020 #ifdef INET 6021 struct sockaddr_in sin; 6022 #endif 6023 #ifdef INET6 6024 struct sockaddr_in6 sin6; 6025 #endif 6026 6027 /* First get the destination address setup too. */ 6028 #ifdef INET 6029 memset(&sin, 0, sizeof(sin)); 6030 sin.sin_family = AF_INET; 6031 sin.sin_len = sizeof(sin); 6032 sin.sin_port = stcb->rport; 6033 #endif 6034 #ifdef INET6 6035 memset(&sin6, 0, sizeof(sin6)); 6036 sin6.sin6_family = AF_INET6; 6037 sin6.sin6_len = sizeof(struct sockaddr_in6); 6038 sin6.sin6_port = stcb->rport; 6039 #endif 6040 if (altsa) { 6041 sa = altsa; 6042 } else { 6043 sa = src; 6044 } 6045 peer_supports_idata = 0; 6046 peer_supports_ecn = 0; 6047 peer_supports_prsctp = 0; 6048 peer_supports_auth = 0; 6049 peer_supports_asconf = 0; 6050 peer_supports_reconfig = 0; 6051 peer_supports_nrsack = 0; 6052 peer_supports_pktdrop = 0; 6053 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6054 /* mark all addresses that we have currently on the list */ 6055 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6056 } 6057 /* does the source address already exist? if so skip it */ 6058 inp = stcb->sctp_ep; 6059 atomic_add_int(&stcb->asoc.refcnt, 1); 6060 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6061 atomic_add_int(&stcb->asoc.refcnt, -1); 6062 6063 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6064 /* we must add the source address */ 6065 /* no scope set here since we have a tcb already. */ 6066 switch (sa->sa_family) { 6067 #ifdef INET 6068 case AF_INET: 6069 if (stcb->asoc.scope.ipv4_addr_legal) { 6070 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6071 return (-1); 6072 } 6073 } 6074 break; 6075 #endif 6076 #ifdef INET6 6077 case AF_INET6: 6078 if (stcb->asoc.scope.ipv6_addr_legal) { 6079 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6080 return (-2); 6081 } 6082 } 6083 break; 6084 #endif 6085 default: 6086 break; 6087 } 6088 } else { 6089 if (net_tmp != NULL && stcb_tmp == stcb) { 6090 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6091 } else if (stcb_tmp != stcb) { 6092 /* It belongs to another association? */ 6093 if (stcb_tmp) 6094 SCTP_TCB_UNLOCK(stcb_tmp); 6095 return (-3); 6096 } 6097 } 6098 if (stcb->asoc.state == 0) { 6099 /* the assoc was freed? */ 6100 return (-4); 6101 } 6102 /* now we must go through each of the params. */ 6103 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6104 while (phdr) { 6105 ptype = ntohs(phdr->param_type); 6106 plen = ntohs(phdr->param_length); 6107 /* 6108 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6109 * (uint32_t)ptype, (int)plen); 6110 */ 6111 if (offset + plen > limit) { 6112 break; 6113 } 6114 if (plen < sizeof(struct sctp_paramhdr)) { 6115 break; 6116 } 6117 #ifdef INET 6118 if (ptype == SCTP_IPV4_ADDRESS) { 6119 if (stcb->asoc.scope.ipv4_addr_legal) { 6120 struct sctp_ipv4addr_param *p4, p4_buf; 6121 6122 /* ok get the v4 address and check/add */ 6123 phdr = sctp_get_next_param(m, offset, 6124 (struct sctp_paramhdr *)&p4_buf, 6125 sizeof(p4_buf)); 6126 if (plen != sizeof(struct sctp_ipv4addr_param) || 6127 phdr == NULL) { 6128 return (-5); 6129 } 6130 p4 = (struct sctp_ipv4addr_param *)phdr; 6131 sin.sin_addr.s_addr = p4->addr; 6132 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6133 /* Skip multi-cast addresses */ 6134 goto next_param; 6135 } 6136 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6137 (sin.sin_addr.s_addr == INADDR_ANY)) { 6138 goto next_param; 6139 } 6140 sa = (struct sockaddr *)&sin; 6141 inp = stcb->sctp_ep; 6142 atomic_add_int(&stcb->asoc.refcnt, 1); 6143 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6144 dst, stcb); 6145 atomic_add_int(&stcb->asoc.refcnt, -1); 6146 6147 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6148 inp == NULL) { 6149 /* we must add the source address */ 6150 /* 6151 * no scope set since we have a tcb 6152 * already 6153 */ 6154 6155 /* 6156 * we must validate the state again 6157 * here 6158 */ 6159 add_it_now: 6160 if (stcb->asoc.state == 0) { 6161 /* the assoc was freed? */ 6162 return (-7); 6163 } 6164 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6165 return (-8); 6166 } 6167 } else if (stcb_tmp == stcb) { 6168 if (stcb->asoc.state == 0) { 6169 /* the assoc was freed? */ 6170 return (-10); 6171 } 6172 if (net != NULL) { 6173 /* clear flag */ 6174 net->dest_state &= 6175 ~SCTP_ADDR_NOT_IN_ASSOC; 6176 } 6177 } else { 6178 /* 6179 * strange, address is in another 6180 * assoc? straighten out locks. 6181 */ 6182 if (stcb_tmp) { 6183 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6184 struct mbuf *op_err; 6185 char msg[SCTP_DIAG_INFO_LEN]; 6186 6187 /* 6188 * in setup state we 6189 * abort this guy 6190 */ 6191 SCTP_SNPRINTF(msg, sizeof(msg), 6192 "%s:%d at %s", __FILE__, __LINE__, __func__); 6193 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6194 msg); 6195 sctp_abort_an_association(stcb_tmp->sctp_ep, 6196 stcb_tmp, op_err, 6197 SCTP_SO_NOT_LOCKED); 6198 goto add_it_now; 6199 } 6200 SCTP_TCB_UNLOCK(stcb_tmp); 6201 } 6202 6203 if (stcb->asoc.state == 0) { 6204 /* the assoc was freed? */ 6205 return (-12); 6206 } 6207 return (-13); 6208 } 6209 } 6210 } else 6211 #endif 6212 #ifdef INET6 6213 if (ptype == SCTP_IPV6_ADDRESS) { 6214 if (stcb->asoc.scope.ipv6_addr_legal) { 6215 /* ok get the v6 address and check/add */ 6216 struct sctp_ipv6addr_param *p6, p6_buf; 6217 6218 phdr = sctp_get_next_param(m, offset, 6219 (struct sctp_paramhdr *)&p6_buf, 6220 sizeof(p6_buf)); 6221 if (plen != sizeof(struct sctp_ipv6addr_param) || 6222 phdr == NULL) { 6223 return (-14); 6224 } 6225 p6 = (struct sctp_ipv6addr_param *)phdr; 6226 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6227 sizeof(p6->addr)); 6228 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6229 /* Skip multi-cast addresses */ 6230 goto next_param; 6231 } 6232 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6233 /* 6234 * Link local make no sense without 6235 * scope 6236 */ 6237 goto next_param; 6238 } 6239 sa = (struct sockaddr *)&sin6; 6240 inp = stcb->sctp_ep; 6241 atomic_add_int(&stcb->asoc.refcnt, 1); 6242 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6243 dst, stcb); 6244 atomic_add_int(&stcb->asoc.refcnt, -1); 6245 if (stcb_tmp == NULL && 6246 (inp == stcb->sctp_ep || inp == NULL)) { 6247 /* 6248 * we must validate the state again 6249 * here 6250 */ 6251 add_it_now6: 6252 if (stcb->asoc.state == 0) { 6253 /* the assoc was freed? */ 6254 return (-16); 6255 } 6256 /* 6257 * we must add the address, no scope 6258 * set 6259 */ 6260 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6261 return (-17); 6262 } 6263 } else if (stcb_tmp == stcb) { 6264 /* 6265 * we must validate the state again 6266 * here 6267 */ 6268 if (stcb->asoc.state == 0) { 6269 /* the assoc was freed? */ 6270 return (-19); 6271 } 6272 if (net != NULL) { 6273 /* clear flag */ 6274 net->dest_state &= 6275 ~SCTP_ADDR_NOT_IN_ASSOC; 6276 } 6277 } else { 6278 /* 6279 * strange, address is in another 6280 * assoc? straighten out locks. 6281 */ 6282 if (stcb_tmp) { 6283 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6284 struct mbuf *op_err; 6285 char msg[SCTP_DIAG_INFO_LEN]; 6286 6287 /* 6288 * in setup state we 6289 * abort this guy 6290 */ 6291 SCTP_SNPRINTF(msg, sizeof(msg), 6292 "%s:%d at %s", __FILE__, __LINE__, __func__); 6293 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6294 msg); 6295 sctp_abort_an_association(stcb_tmp->sctp_ep, 6296 stcb_tmp, op_err, 6297 SCTP_SO_NOT_LOCKED); 6298 goto add_it_now6; 6299 } 6300 SCTP_TCB_UNLOCK(stcb_tmp); 6301 } 6302 if (stcb->asoc.state == 0) { 6303 /* the assoc was freed? */ 6304 return (-21); 6305 } 6306 return (-22); 6307 } 6308 } 6309 } else 6310 #endif 6311 if (ptype == SCTP_ECN_CAPABLE) { 6312 peer_supports_ecn = 1; 6313 } else if (ptype == SCTP_ULP_ADAPTATION) { 6314 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6315 struct sctp_adaptation_layer_indication ai, 6316 *aip; 6317 6318 phdr = sctp_get_next_param(m, offset, 6319 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6320 aip = (struct sctp_adaptation_layer_indication *)phdr; 6321 if (aip) { 6322 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6323 stcb->asoc.adaptation_needed = 1; 6324 } 6325 } 6326 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6327 struct sctp_asconf_addr_param lstore, *fee; 6328 int lptype; 6329 struct sockaddr *lsa = NULL; 6330 #ifdef INET 6331 struct sctp_asconf_addrv4_param *fii; 6332 #endif 6333 6334 if (stcb->asoc.asconf_supported == 0) { 6335 return (-100); 6336 } 6337 if (plen > sizeof(lstore)) { 6338 return (-23); 6339 } 6340 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6341 return (-101); 6342 } 6343 phdr = sctp_get_next_param(m, offset, 6344 (struct sctp_paramhdr *)&lstore, 6345 plen); 6346 if (phdr == NULL) { 6347 return (-24); 6348 } 6349 fee = (struct sctp_asconf_addr_param *)phdr; 6350 lptype = ntohs(fee->addrp.ph.param_type); 6351 switch (lptype) { 6352 #ifdef INET 6353 case SCTP_IPV4_ADDRESS: 6354 if (plen != 6355 sizeof(struct sctp_asconf_addrv4_param)) { 6356 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6357 (int)sizeof(struct sctp_asconf_addrv4_param), 6358 plen); 6359 } else { 6360 fii = (struct sctp_asconf_addrv4_param *)fee; 6361 sin.sin_addr.s_addr = fii->addrp.addr; 6362 lsa = (struct sockaddr *)&sin; 6363 } 6364 break; 6365 #endif 6366 #ifdef INET6 6367 case SCTP_IPV6_ADDRESS: 6368 if (plen != 6369 sizeof(struct sctp_asconf_addr_param)) { 6370 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6371 (int)sizeof(struct sctp_asconf_addr_param), 6372 plen); 6373 } else { 6374 memcpy(sin6.sin6_addr.s6_addr, 6375 fee->addrp.addr, 6376 sizeof(fee->addrp.addr)); 6377 lsa = (struct sockaddr *)&sin6; 6378 } 6379 break; 6380 #endif 6381 default: 6382 break; 6383 } 6384 if (lsa) { 6385 (void)sctp_set_primary_addr(stcb, sa, NULL); 6386 } 6387 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6388 stcb->asoc.peer_supports_nat = 1; 6389 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6390 /* Peer supports pr-sctp */ 6391 peer_supports_prsctp = 1; 6392 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6393 /* A supported extension chunk */ 6394 struct sctp_supported_chunk_types_param *pr_supported; 6395 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6396 int num_ent, i; 6397 6398 if (plen > sizeof(local_store)) { 6399 return (-35); 6400 } 6401 phdr = sctp_get_next_param(m, offset, 6402 (struct sctp_paramhdr *)&local_store, plen); 6403 if (phdr == NULL) { 6404 return (-25); 6405 } 6406 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6407 num_ent = plen - sizeof(struct sctp_paramhdr); 6408 for (i = 0; i < num_ent; i++) { 6409 switch (pr_supported->chunk_types[i]) { 6410 case SCTP_ASCONF: 6411 peer_supports_asconf = 1; 6412 break; 6413 case SCTP_ASCONF_ACK: 6414 peer_supports_asconf_ack = 1; 6415 break; 6416 case SCTP_FORWARD_CUM_TSN: 6417 peer_supports_prsctp = 1; 6418 break; 6419 case SCTP_PACKET_DROPPED: 6420 peer_supports_pktdrop = 1; 6421 break; 6422 case SCTP_NR_SELECTIVE_ACK: 6423 peer_supports_nrsack = 1; 6424 break; 6425 case SCTP_STREAM_RESET: 6426 peer_supports_reconfig = 1; 6427 break; 6428 case SCTP_AUTHENTICATION: 6429 peer_supports_auth = 1; 6430 break; 6431 case SCTP_IDATA: 6432 peer_supports_idata = 1; 6433 break; 6434 default: 6435 /* one I have not learned yet */ 6436 break; 6437 } 6438 } 6439 } else if (ptype == SCTP_RANDOM) { 6440 if (plen > sizeof(random_store)) 6441 break; 6442 if (got_random) { 6443 /* already processed a RANDOM */ 6444 goto next_param; 6445 } 6446 phdr = sctp_get_next_param(m, offset, 6447 (struct sctp_paramhdr *)random_store, 6448 plen); 6449 if (phdr == NULL) 6450 return (-26); 6451 p_random = (struct sctp_auth_random *)phdr; 6452 random_len = plen - sizeof(*p_random); 6453 /* enforce the random length */ 6454 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6455 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6456 return (-27); 6457 } 6458 got_random = 1; 6459 } else if (ptype == SCTP_HMAC_LIST) { 6460 uint16_t num_hmacs; 6461 uint16_t i; 6462 6463 if (plen > sizeof(hmacs_store)) 6464 break; 6465 if (got_hmacs) { 6466 /* already processed a HMAC list */ 6467 goto next_param; 6468 } 6469 phdr = sctp_get_next_param(m, offset, 6470 (struct sctp_paramhdr *)hmacs_store, 6471 plen); 6472 if (phdr == NULL) 6473 return (-28); 6474 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6475 hmacs_len = plen - sizeof(*hmacs); 6476 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6477 /* validate the hmac list */ 6478 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6479 return (-29); 6480 } 6481 if (stcb->asoc.peer_hmacs != NULL) 6482 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6483 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6484 if (stcb->asoc.peer_hmacs != NULL) { 6485 for (i = 0; i < num_hmacs; i++) { 6486 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6487 ntohs(hmacs->hmac_ids[i])); 6488 } 6489 } 6490 got_hmacs = 1; 6491 } else if (ptype == SCTP_CHUNK_LIST) { 6492 int i; 6493 6494 if (plen > sizeof(chunks_store)) 6495 break; 6496 if (got_chklist) { 6497 /* already processed a Chunks list */ 6498 goto next_param; 6499 } 6500 phdr = sctp_get_next_param(m, offset, 6501 (struct sctp_paramhdr *)chunks_store, 6502 plen); 6503 if (phdr == NULL) 6504 return (-30); 6505 chunks = (struct sctp_auth_chunk_list *)phdr; 6506 num_chunks = plen - sizeof(*chunks); 6507 if (stcb->asoc.peer_auth_chunks != NULL) 6508 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6509 else 6510 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6511 for (i = 0; i < num_chunks; i++) { 6512 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6513 stcb->asoc.peer_auth_chunks); 6514 /* record asconf/asconf-ack if listed */ 6515 if (chunks->chunk_types[i] == SCTP_ASCONF) 6516 saw_asconf = 1; 6517 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6518 saw_asconf_ack = 1; 6519 } 6520 got_chklist = 1; 6521 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6522 (ptype == SCTP_STATE_COOKIE) || 6523 (ptype == SCTP_UNRECOG_PARAM) || 6524 (ptype == SCTP_COOKIE_PRESERVE) || 6525 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6526 (ptype == SCTP_ADD_IP_ADDRESS) || 6527 (ptype == SCTP_DEL_IP_ADDRESS) || 6528 (ptype == SCTP_ERROR_CAUSE_IND) || 6529 (ptype == SCTP_SUCCESS_REPORT)) { 6530 /* don't care */ 6531 } else { 6532 if ((ptype & 0x8000) == 0x0000) { 6533 /* 6534 * must stop processing the rest of the 6535 * param's. Any report bits were handled 6536 * with the call to 6537 * sctp_arethere_unrecognized_parameters() 6538 * when the INIT or INIT-ACK was first seen. 6539 */ 6540 break; 6541 } 6542 } 6543 6544 next_param: 6545 offset += SCTP_SIZE32(plen); 6546 if (offset >= limit) { 6547 break; 6548 } 6549 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6550 sizeof(param_buf)); 6551 } 6552 /* Now check to see if we need to purge any addresses */ 6553 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6554 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6555 SCTP_ADDR_NOT_IN_ASSOC) { 6556 /* This address has been removed from the asoc */ 6557 /* remove and free it */ 6558 stcb->asoc.numnets--; 6559 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6560 sctp_free_remote_addr(net); 6561 if (net == stcb->asoc.primary_destination) { 6562 stcb->asoc.primary_destination = NULL; 6563 sctp_select_primary_destination(stcb); 6564 } 6565 } 6566 } 6567 if ((stcb->asoc.ecn_supported == 1) && 6568 (peer_supports_ecn == 0)) { 6569 stcb->asoc.ecn_supported = 0; 6570 } 6571 if ((stcb->asoc.prsctp_supported == 1) && 6572 (peer_supports_prsctp == 0)) { 6573 stcb->asoc.prsctp_supported = 0; 6574 } 6575 if ((stcb->asoc.auth_supported == 1) && 6576 ((peer_supports_auth == 0) || 6577 (got_random == 0) || (got_hmacs == 0))) { 6578 stcb->asoc.auth_supported = 0; 6579 } 6580 if ((stcb->asoc.asconf_supported == 1) && 6581 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6582 (stcb->asoc.auth_supported == 0) || 6583 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6584 stcb->asoc.asconf_supported = 0; 6585 } 6586 if ((stcb->asoc.reconfig_supported == 1) && 6587 (peer_supports_reconfig == 0)) { 6588 stcb->asoc.reconfig_supported = 0; 6589 } 6590 if ((stcb->asoc.idata_supported == 1) && 6591 (peer_supports_idata == 0)) { 6592 stcb->asoc.idata_supported = 0; 6593 } 6594 if ((stcb->asoc.nrsack_supported == 1) && 6595 (peer_supports_nrsack == 0)) { 6596 stcb->asoc.nrsack_supported = 0; 6597 } 6598 if ((stcb->asoc.pktdrop_supported == 1) && 6599 (peer_supports_pktdrop == 0)) { 6600 stcb->asoc.pktdrop_supported = 0; 6601 } 6602 /* validate authentication required parameters */ 6603 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6604 /* peer does not support auth but sent a chunks list? */ 6605 return (-31); 6606 } 6607 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6608 /* peer supports asconf but not auth? */ 6609 return (-32); 6610 } else if ((peer_supports_asconf == 1) && 6611 (peer_supports_auth == 1) && 6612 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6613 return (-33); 6614 } 6615 /* concatenate the full random key */ 6616 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6617 if (chunks != NULL) { 6618 keylen += sizeof(*chunks) + num_chunks; 6619 } 6620 new_key = sctp_alloc_key(keylen); 6621 if (new_key != NULL) { 6622 /* copy in the RANDOM */ 6623 if (p_random != NULL) { 6624 keylen = sizeof(*p_random) + random_len; 6625 memcpy(new_key->key, p_random, keylen); 6626 } else { 6627 keylen = 0; 6628 } 6629 /* append in the AUTH chunks */ 6630 if (chunks != NULL) { 6631 memcpy(new_key->key + keylen, chunks, 6632 sizeof(*chunks) + num_chunks); 6633 keylen += sizeof(*chunks) + num_chunks; 6634 } 6635 /* append in the HMACs */ 6636 if (hmacs != NULL) { 6637 memcpy(new_key->key + keylen, hmacs, 6638 sizeof(*hmacs) + hmacs_len); 6639 } 6640 } else { 6641 /* failed to get memory for the key */ 6642 return (-34); 6643 } 6644 if (stcb->asoc.authinfo.peer_random != NULL) 6645 sctp_free_key(stcb->asoc.authinfo.peer_random); 6646 stcb->asoc.authinfo.peer_random = new_key; 6647 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6648 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6649 6650 return (0); 6651 } 6652 6653 int 6654 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6655 struct sctp_nets *net) 6656 { 6657 /* make sure the requested primary address exists in the assoc */ 6658 if (net == NULL && sa) 6659 net = sctp_findnet(stcb, sa); 6660 6661 if (net == NULL) { 6662 /* didn't find the requested primary address! */ 6663 return (-1); 6664 } else { 6665 /* set the primary address */ 6666 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6667 /* Must be confirmed, so queue to set */ 6668 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6669 return (0); 6670 } 6671 stcb->asoc.primary_destination = net; 6672 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6673 sctp_free_remote_addr(stcb->asoc.alternate); 6674 stcb->asoc.alternate = NULL; 6675 } 6676 net = TAILQ_FIRST(&stcb->asoc.nets); 6677 if (net != stcb->asoc.primary_destination) { 6678 /* 6679 * first one on the list is NOT the primary 6680 * sctp_cmpaddr() is much more efficient if the 6681 * primary is the first on the list, make it so. 6682 */ 6683 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6684 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6685 } 6686 return (0); 6687 } 6688 } 6689 6690 int 6691 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6692 { 6693 /* 6694 * This function serves two purposes. It will see if a TAG can be 6695 * re-used and return 1 for yes it is ok and 0 for don't use that 6696 * tag. A secondary function it will do is purge out old tags that 6697 * can be removed. 6698 */ 6699 struct sctpvtaghead *chain; 6700 struct sctp_tagblock *twait_block; 6701 struct sctpasochead *head; 6702 struct sctp_tcb *stcb; 6703 int i; 6704 6705 SCTP_INP_INFO_RLOCK(); 6706 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6707 SCTP_BASE_INFO(hashasocmark))]; 6708 LIST_FOREACH(stcb, head, sctp_asocs) { 6709 /* 6710 * We choose not to lock anything here. TCB's can't be 6711 * removed since we have the read lock, so they can't be 6712 * freed on us, same thing for the INP. I may be wrong with 6713 * this assumption, but we will go with it for now :-) 6714 */ 6715 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6716 continue; 6717 } 6718 if (stcb->asoc.my_vtag == tag) { 6719 /* candidate */ 6720 if (stcb->rport != rport) { 6721 continue; 6722 } 6723 if (stcb->sctp_ep->sctp_lport != lport) { 6724 continue; 6725 } 6726 /* Its a used tag set */ 6727 SCTP_INP_INFO_RUNLOCK(); 6728 return (0); 6729 } 6730 } 6731 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6732 /* Now what about timed wait ? */ 6733 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6734 /* 6735 * Block(s) are present, lets see if we have this tag in the 6736 * list 6737 */ 6738 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6739 if (twait_block->vtag_block[i].v_tag == 0) { 6740 /* not used */ 6741 continue; 6742 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6743 now->tv_sec) { 6744 /* Audit expires this guy */ 6745 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6746 twait_block->vtag_block[i].v_tag = 0; 6747 twait_block->vtag_block[i].lport = 0; 6748 twait_block->vtag_block[i].rport = 0; 6749 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6750 (twait_block->vtag_block[i].lport == lport) && 6751 (twait_block->vtag_block[i].rport == rport)) { 6752 /* Bad tag, sorry :< */ 6753 SCTP_INP_INFO_RUNLOCK(); 6754 return (0); 6755 } 6756 } 6757 } 6758 SCTP_INP_INFO_RUNLOCK(); 6759 return (1); 6760 } 6761 6762 static void 6763 sctp_drain_mbufs(struct sctp_tcb *stcb) 6764 { 6765 /* 6766 * We must hunt this association for MBUF's past the cumack (i.e. 6767 * out of order data that we can renege on). 6768 */ 6769 struct sctp_association *asoc; 6770 struct sctp_tmit_chunk *chk, *nchk; 6771 uint32_t cumulative_tsn_p1; 6772 struct sctp_queued_to_read *control, *ncontrol; 6773 int cnt, strmat; 6774 uint32_t gap, i; 6775 int fnd = 0; 6776 6777 /* We look for anything larger than the cum-ack + 1 */ 6778 6779 asoc = &stcb->asoc; 6780 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6781 /* none we can reneg on. */ 6782 return; 6783 } 6784 SCTP_STAT_INCR(sctps_protocol_drains_done); 6785 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6786 cnt = 0; 6787 /* Ok that was fun, now we will drain all the inbound streams? */ 6788 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6789 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6790 #ifdef INVARIANTS 6791 if (control->on_strm_q != SCTP_ON_ORDERED) { 6792 panic("Huh control: %p on_q: %d -- not ordered?", 6793 control, control->on_strm_q); 6794 } 6795 #endif 6796 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6797 /* Yep it is above cum-ack */ 6798 cnt++; 6799 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6800 KASSERT(control->length > 0, ("control has zero length")); 6801 if (asoc->size_on_all_streams >= control->length) { 6802 asoc->size_on_all_streams -= control->length; 6803 } else { 6804 #ifdef INVARIANTS 6805 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6806 #else 6807 asoc->size_on_all_streams = 0; 6808 #endif 6809 } 6810 sctp_ucount_decr(asoc->cnt_on_all_streams); 6811 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6812 if (control->on_read_q) { 6813 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6814 control->on_read_q = 0; 6815 } 6816 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6817 control->on_strm_q = 0; 6818 if (control->data) { 6819 sctp_m_freem(control->data); 6820 control->data = NULL; 6821 } 6822 sctp_free_remote_addr(control->whoFrom); 6823 /* Now its reasm? */ 6824 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6825 cnt++; 6826 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6827 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6828 if (asoc->size_on_reasm_queue >= chk->send_size) { 6829 asoc->size_on_reasm_queue -= chk->send_size; 6830 } else { 6831 #ifdef INVARIANTS 6832 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6833 #else 6834 asoc->size_on_reasm_queue = 0; 6835 #endif 6836 } 6837 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6838 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6839 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6840 if (chk->data) { 6841 sctp_m_freem(chk->data); 6842 chk->data = NULL; 6843 } 6844 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6845 } 6846 sctp_free_a_readq(stcb, control); 6847 } 6848 } 6849 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6850 #ifdef INVARIANTS 6851 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6852 panic("Huh control: %p on_q: %d -- not unordered?", 6853 control, control->on_strm_q); 6854 } 6855 #endif 6856 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6857 /* Yep it is above cum-ack */ 6858 cnt++; 6859 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6860 KASSERT(control->length > 0, ("control has zero length")); 6861 if (asoc->size_on_all_streams >= control->length) { 6862 asoc->size_on_all_streams -= control->length; 6863 } else { 6864 #ifdef INVARIANTS 6865 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6866 #else 6867 asoc->size_on_all_streams = 0; 6868 #endif 6869 } 6870 sctp_ucount_decr(asoc->cnt_on_all_streams); 6871 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6872 if (control->on_read_q) { 6873 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6874 control->on_read_q = 0; 6875 } 6876 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6877 control->on_strm_q = 0; 6878 if (control->data) { 6879 sctp_m_freem(control->data); 6880 control->data = NULL; 6881 } 6882 sctp_free_remote_addr(control->whoFrom); 6883 /* Now its reasm? */ 6884 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6885 cnt++; 6886 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6887 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6888 if (asoc->size_on_reasm_queue >= chk->send_size) { 6889 asoc->size_on_reasm_queue -= chk->send_size; 6890 } else { 6891 #ifdef INVARIANTS 6892 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6893 #else 6894 asoc->size_on_reasm_queue = 0; 6895 #endif 6896 } 6897 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6898 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6899 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6900 if (chk->data) { 6901 sctp_m_freem(chk->data); 6902 chk->data = NULL; 6903 } 6904 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6905 } 6906 sctp_free_a_readq(stcb, control); 6907 } 6908 } 6909 } 6910 if (cnt) { 6911 /* We must back down to see what the new highest is */ 6912 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6913 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6914 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6915 asoc->highest_tsn_inside_map = i; 6916 fnd = 1; 6917 break; 6918 } 6919 } 6920 if (!fnd) { 6921 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6922 } 6923 6924 /* 6925 * Question, should we go through the delivery queue? The 6926 * only reason things are on here is the app not reading OR 6927 * a p-d-api up. An attacker COULD send enough in to 6928 * initiate the PD-API and then send a bunch of stuff to 6929 * other streams... these would wind up on the delivery 6930 * queue.. and then we would not get to them. But in order 6931 * to do this I then have to back-track and un-deliver 6932 * sequence numbers in streams.. el-yucko. I think for now 6933 * we will NOT look at the delivery queue and leave it to be 6934 * something to consider later. An alternative would be to 6935 * abort the P-D-API with a notification and then deliver 6936 * the data.... Or another method might be to keep track of 6937 * how many times the situation occurs and if we see a 6938 * possible attack underway just abort the association. 6939 */ 6940 #ifdef SCTP_DEBUG 6941 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6942 #endif 6943 /* 6944 * Now do we need to find a new 6945 * asoc->highest_tsn_inside_map? 6946 */ 6947 asoc->last_revoke_count = cnt; 6948 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6949 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6950 /* sa_ignore NO_NULL_CHK */ 6951 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6952 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6953 } 6954 /* 6955 * Another issue, in un-setting the TSN's in the mapping array we 6956 * DID NOT adjust the highest_tsn marker. This will cause one of 6957 * two things to occur. It may cause us to do extra work in checking 6958 * for our mapping array movement. More importantly it may cause us 6959 * to SACK every datagram. This may not be a bad thing though since 6960 * we will recover once we get our cum-ack above and all this stuff 6961 * we dumped recovered. 6962 */ 6963 } 6964 6965 void 6966 sctp_drain() 6967 { 6968 /* 6969 * We must walk the PCB lists for ALL associations here. The system 6970 * is LOW on MBUF's and needs help. This is where reneging will 6971 * occur. We really hope this does NOT happen! 6972 */ 6973 VNET_ITERATOR_DECL(vnet_iter); 6974 VNET_LIST_RLOCK_NOSLEEP(); 6975 VNET_FOREACH(vnet_iter) { 6976 CURVNET_SET(vnet_iter); 6977 struct sctp_inpcb *inp; 6978 struct sctp_tcb *stcb; 6979 6980 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6981 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6982 #ifdef VIMAGE 6983 continue; 6984 #else 6985 return; 6986 #endif 6987 } 6988 SCTP_INP_INFO_RLOCK(); 6989 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6990 /* For each endpoint */ 6991 SCTP_INP_RLOCK(inp); 6992 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6993 /* For each association */ 6994 SCTP_TCB_LOCK(stcb); 6995 sctp_drain_mbufs(stcb); 6996 SCTP_TCB_UNLOCK(stcb); 6997 } 6998 SCTP_INP_RUNLOCK(inp); 6999 } 7000 SCTP_INP_INFO_RUNLOCK(); 7001 CURVNET_RESTORE(); 7002 } 7003 VNET_LIST_RUNLOCK_NOSLEEP(); 7004 } 7005 7006 /* 7007 * start a new iterator 7008 * iterates through all endpoints and associations based on the pcb_state 7009 * flags and asoc_state. "af" (mandatory) is executed for all matching 7010 * assocs and "ef" (optional) is executed when the iterator completes. 7011 * "inpf" (optional) is executed for each new endpoint as it is being 7012 * iterated through. inpe (optional) is called when the inp completes 7013 * its way through all the stcbs. 7014 */ 7015 int 7016 sctp_initiate_iterator(inp_func inpf, 7017 asoc_func af, 7018 inp_func inpe, 7019 uint32_t pcb_state, 7020 uint32_t pcb_features, 7021 uint32_t asoc_state, 7022 void *argp, 7023 uint32_t argi, 7024 end_func ef, 7025 struct sctp_inpcb *s_inp, 7026 uint8_t chunk_output_off) 7027 { 7028 struct sctp_iterator *it = NULL; 7029 7030 if (af == NULL) { 7031 return (-1); 7032 } 7033 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7034 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7035 SCTP_BASE_VAR(sctp_pcb_initialized)); 7036 return (-1); 7037 } 7038 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7039 SCTP_M_ITER); 7040 if (it == NULL) { 7041 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7042 return (-1); 7043 } 7044 memset(it, 0, sizeof(*it)); 7045 it->function_assoc = af; 7046 it->function_inp = inpf; 7047 if (inpf) 7048 it->done_current_ep = 0; 7049 else 7050 it->done_current_ep = 1; 7051 it->function_atend = ef; 7052 it->pointer = argp; 7053 it->val = argi; 7054 it->pcb_flags = pcb_state; 7055 it->pcb_features = pcb_features; 7056 it->asoc_state = asoc_state; 7057 it->function_inp_end = inpe; 7058 it->no_chunk_output = chunk_output_off; 7059 it->vn = curvnet; 7060 if (s_inp) { 7061 /* Assume lock is held here */ 7062 it->inp = s_inp; 7063 SCTP_INP_INCR_REF(it->inp); 7064 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7065 } else { 7066 SCTP_INP_INFO_RLOCK(); 7067 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7068 if (it->inp) { 7069 SCTP_INP_INCR_REF(it->inp); 7070 } 7071 SCTP_INP_INFO_RUNLOCK(); 7072 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7073 } 7074 SCTP_IPI_ITERATOR_WQ_LOCK(); 7075 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7076 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7077 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7078 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7079 SCTP_FREE(it, SCTP_M_ITER); 7080 return (-1); 7081 } 7082 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7083 if (sctp_it_ctl.iterator_running == 0) { 7084 sctp_wakeup_iterator(); 7085 } 7086 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7087 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7088 return (0); 7089 } 7090