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); 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->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1550 SCTP_PRINTF("TSNH ep_associd0\n"); 1551 return (NULL); 1552 } 1553 id = (uint32_t)asoc_id; 1554 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1555 if (head == NULL) { 1556 /* invalid id TSNH */ 1557 SCTP_PRINTF("TSNH ep_associd1\n"); 1558 return (NULL); 1559 } 1560 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1561 if (stcb->asoc.assoc_id == id) { 1562 if (inp != stcb->sctp_ep) { 1563 /* 1564 * some other guy has the same id active (id 1565 * collision ??). 1566 */ 1567 SCTP_PRINTF("TSNH ep_associd2\n"); 1568 continue; 1569 } 1570 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1571 continue; 1572 } 1573 if (want_lock) { 1574 SCTP_TCB_LOCK(stcb); 1575 } 1576 return (stcb); 1577 } 1578 } 1579 return (NULL); 1580 } 1581 1582 struct sctp_tcb * 1583 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1584 { 1585 struct sctp_tcb *stcb; 1586 1587 SCTP_INP_RLOCK(inp); 1588 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1589 SCTP_INP_RUNLOCK(inp); 1590 return (stcb); 1591 } 1592 1593 /* 1594 * Endpoint probe expects that the INP_INFO is locked. 1595 */ 1596 static struct sctp_inpcb * 1597 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1598 uint16_t lport, uint32_t vrf_id) 1599 { 1600 struct sctp_inpcb *inp; 1601 struct sctp_laddr *laddr; 1602 #ifdef INET 1603 struct sockaddr_in *sin; 1604 #endif 1605 #ifdef INET6 1606 struct sockaddr_in6 *sin6; 1607 struct sockaddr_in6 *intf_addr6; 1608 #endif 1609 int fnd; 1610 1611 #ifdef INET 1612 sin = NULL; 1613 #endif 1614 #ifdef INET6 1615 sin6 = NULL; 1616 #endif 1617 switch (nam->sa_family) { 1618 #ifdef INET 1619 case AF_INET: 1620 sin = (struct sockaddr_in *)nam; 1621 break; 1622 #endif 1623 #ifdef INET6 1624 case AF_INET6: 1625 sin6 = (struct sockaddr_in6 *)nam; 1626 break; 1627 #endif 1628 default: 1629 /* unsupported family */ 1630 return (NULL); 1631 } 1632 1633 if (head == NULL) 1634 return (NULL); 1635 1636 LIST_FOREACH(inp, head, sctp_hash) { 1637 SCTP_INP_RLOCK(inp); 1638 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1639 SCTP_INP_RUNLOCK(inp); 1640 continue; 1641 } 1642 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1643 (inp->sctp_lport == lport)) { 1644 /* got it */ 1645 switch (nam->sa_family) { 1646 #ifdef INET 1647 case AF_INET: 1648 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1649 SCTP_IPV6_V6ONLY(inp)) { 1650 /* 1651 * IPv4 on a IPv6 socket with ONLY 1652 * IPv6 set 1653 */ 1654 SCTP_INP_RUNLOCK(inp); 1655 continue; 1656 } 1657 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1658 &sin->sin_addr) != 0) { 1659 SCTP_INP_RUNLOCK(inp); 1660 continue; 1661 } 1662 break; 1663 #endif 1664 #ifdef INET6 1665 case AF_INET6: 1666 /* 1667 * A V6 address and the endpoint is NOT 1668 * bound V6 1669 */ 1670 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1671 SCTP_INP_RUNLOCK(inp); 1672 continue; 1673 } 1674 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1675 &sin6->sin6_addr) != 0) { 1676 SCTP_INP_RUNLOCK(inp); 1677 continue; 1678 } 1679 break; 1680 #endif 1681 default: 1682 break; 1683 } 1684 /* does a VRF id match? */ 1685 fnd = 0; 1686 if (inp->def_vrf_id == vrf_id) 1687 fnd = 1; 1688 1689 SCTP_INP_RUNLOCK(inp); 1690 if (!fnd) 1691 continue; 1692 return (inp); 1693 } 1694 SCTP_INP_RUNLOCK(inp); 1695 } 1696 switch (nam->sa_family) { 1697 #ifdef INET 1698 case AF_INET: 1699 if (sin->sin_addr.s_addr == INADDR_ANY) { 1700 /* Can't hunt for one that has no address specified */ 1701 return (NULL); 1702 } 1703 break; 1704 #endif 1705 #ifdef INET6 1706 case AF_INET6: 1707 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1708 /* Can't hunt for one that has no address specified */ 1709 return (NULL); 1710 } 1711 break; 1712 #endif 1713 default: 1714 break; 1715 } 1716 /* 1717 * ok, not bound to all so see if we can find a EP bound to this 1718 * address. 1719 */ 1720 LIST_FOREACH(inp, head, sctp_hash) { 1721 SCTP_INP_RLOCK(inp); 1722 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1723 SCTP_INP_RUNLOCK(inp); 1724 continue; 1725 } 1726 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1727 SCTP_INP_RUNLOCK(inp); 1728 continue; 1729 } 1730 /* 1731 * Ok this could be a likely candidate, look at all of its 1732 * addresses 1733 */ 1734 if (inp->sctp_lport != lport) { 1735 SCTP_INP_RUNLOCK(inp); 1736 continue; 1737 } 1738 /* does a VRF id match? */ 1739 fnd = 0; 1740 if (inp->def_vrf_id == vrf_id) 1741 fnd = 1; 1742 1743 if (!fnd) { 1744 SCTP_INP_RUNLOCK(inp); 1745 continue; 1746 } 1747 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1748 if (laddr->ifa == NULL) { 1749 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1750 __func__); 1751 continue; 1752 } 1753 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1754 (void *)laddr->ifa); 1755 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1756 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1757 continue; 1758 } 1759 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1760 /* possible, see if it matches */ 1761 switch (nam->sa_family) { 1762 #ifdef INET 1763 case AF_INET: 1764 if (sin->sin_addr.s_addr == 1765 laddr->ifa->address.sin.sin_addr.s_addr) { 1766 SCTP_INP_RUNLOCK(inp); 1767 return (inp); 1768 } 1769 break; 1770 #endif 1771 #ifdef INET6 1772 case AF_INET6: 1773 intf_addr6 = &laddr->ifa->address.sin6; 1774 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1775 intf_addr6)) { 1776 SCTP_INP_RUNLOCK(inp); 1777 return (inp); 1778 } 1779 break; 1780 #endif 1781 } 1782 } 1783 } 1784 SCTP_INP_RUNLOCK(inp); 1785 } 1786 return (NULL); 1787 } 1788 1789 static struct sctp_inpcb * 1790 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1791 { 1792 struct sctppcbhead *head; 1793 struct sctp_inpcb *t_inp; 1794 int fnd; 1795 1796 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1797 SCTP_BASE_INFO(hashmark))]; 1798 LIST_FOREACH(t_inp, head, sctp_hash) { 1799 if (t_inp->sctp_lport != lport) { 1800 continue; 1801 } 1802 /* is it in the VRF in question */ 1803 fnd = 0; 1804 if (t_inp->def_vrf_id == vrf_id) 1805 fnd = 1; 1806 if (!fnd) 1807 continue; 1808 1809 /* This one is in use. */ 1810 /* check the v6/v4 binding issue */ 1811 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1812 SCTP_IPV6_V6ONLY(t_inp)) { 1813 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1814 /* collision in V6 space */ 1815 return (t_inp); 1816 } else { 1817 /* inp is BOUND_V4 no conflict */ 1818 continue; 1819 } 1820 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1821 /* t_inp is bound v4 and v6, conflict always */ 1822 return (t_inp); 1823 } else { 1824 /* t_inp is bound only V4 */ 1825 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1826 SCTP_IPV6_V6ONLY(inp)) { 1827 /* no conflict */ 1828 continue; 1829 } 1830 /* else fall through to conflict */ 1831 } 1832 return (t_inp); 1833 } 1834 return (NULL); 1835 } 1836 1837 int 1838 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1839 { 1840 /* For 1-2-1 with port reuse */ 1841 struct sctppcbhead *head; 1842 struct sctp_inpcb *tinp, *ninp; 1843 1844 SCTP_INP_INFO_WLOCK_ASSERT(); 1845 SCTP_INP_WLOCK_ASSERT(inp); 1846 1847 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1848 /* only works with port reuse on */ 1849 return (-1); 1850 } 1851 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1852 return (0); 1853 } 1854 SCTP_INP_WUNLOCK(inp); 1855 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1856 SCTP_BASE_INFO(hashmark))]; 1857 /* Kick out all non-listeners to the TCP hash */ 1858 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1859 if (tinp->sctp_lport != inp->sctp_lport) { 1860 continue; 1861 } 1862 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1863 continue; 1864 } 1865 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1866 continue; 1867 } 1868 if (SCTP_IS_LISTENING(tinp)) { 1869 continue; 1870 } 1871 SCTP_INP_WLOCK(tinp); 1872 LIST_REMOVE(tinp, sctp_hash); 1873 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1874 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1875 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1876 SCTP_INP_WUNLOCK(tinp); 1877 } 1878 SCTP_INP_WLOCK(inp); 1879 /* Pull from where he was */ 1880 LIST_REMOVE(inp, sctp_hash); 1881 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1882 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1883 LIST_INSERT_HEAD(head, inp, sctp_hash); 1884 return (0); 1885 } 1886 1887 struct sctp_inpcb * 1888 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1889 uint32_t vrf_id) 1890 { 1891 /* 1892 * First we check the hash table to see if someone has this port 1893 * bound with just the port. 1894 */ 1895 struct sctp_inpcb *inp; 1896 struct sctppcbhead *head; 1897 int lport; 1898 unsigned int i; 1899 #ifdef INET 1900 struct sockaddr_in *sin; 1901 #endif 1902 #ifdef INET6 1903 struct sockaddr_in6 *sin6; 1904 #endif 1905 1906 switch (nam->sa_family) { 1907 #ifdef INET 1908 case AF_INET: 1909 sin = (struct sockaddr_in *)nam; 1910 lport = sin->sin_port; 1911 break; 1912 #endif 1913 #ifdef INET6 1914 case AF_INET6: 1915 sin6 = (struct sockaddr_in6 *)nam; 1916 lport = sin6->sin6_port; 1917 break; 1918 #endif 1919 default: 1920 return (NULL); 1921 } 1922 /* 1923 * I could cheat here and just cast to one of the types but we will 1924 * do it right. It also provides the check against an Unsupported 1925 * type too. 1926 */ 1927 /* Find the head of the ALLADDR chain */ 1928 if (have_lock == 0) { 1929 SCTP_INP_INFO_RLOCK(); 1930 } 1931 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1932 SCTP_BASE_INFO(hashmark))]; 1933 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1934 1935 /* 1936 * If the TCP model exists it could be that the main listening 1937 * endpoint is gone but there still exists a connected socket for 1938 * this guy. If so we can return the first one that we find. This 1939 * may NOT be the correct one so the caller should be wary on the 1940 * returned INP. Currently the only caller that sets find_tcp_pool 1941 * is in bindx where we are verifying that a user CAN bind the 1942 * address. He either has bound it already, or someone else has, or 1943 * its open to bind, so this is good enough. 1944 */ 1945 if (inp == NULL && find_tcp_pool) { 1946 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1947 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1948 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1949 if (inp) { 1950 break; 1951 } 1952 } 1953 } 1954 if (inp) { 1955 SCTP_INP_INCR_REF(inp); 1956 } 1957 if (have_lock == 0) { 1958 SCTP_INP_INFO_RUNLOCK(); 1959 } 1960 return (inp); 1961 } 1962 1963 /* 1964 * Find an association for an endpoint with the pointer to whom you want to 1965 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1966 * need to change the *to to some other struct like a mbuf... 1967 */ 1968 struct sctp_tcb * 1969 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1970 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1971 uint32_t vrf_id) 1972 { 1973 struct sctp_inpcb *inp = NULL; 1974 struct sctp_tcb *stcb; 1975 1976 SCTP_INP_INFO_RLOCK(); 1977 if (find_tcp_pool) { 1978 if (inp_p != NULL) { 1979 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1980 vrf_id); 1981 } else { 1982 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1983 vrf_id); 1984 } 1985 if (stcb != NULL) { 1986 SCTP_INP_INFO_RUNLOCK(); 1987 return (stcb); 1988 } 1989 } 1990 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1991 if (inp_p != NULL) { 1992 *inp_p = inp; 1993 } 1994 SCTP_INP_INFO_RUNLOCK(); 1995 if (inp == NULL) { 1996 return (NULL); 1997 } 1998 /* 1999 * ok, we have an endpoint, now lets find the assoc for it (if any) 2000 * we now place the source address or from in the to of the find 2001 * endpoint call. Since in reality this chain is used from the 2002 * inbound packet side. 2003 */ 2004 if (inp_p != NULL) { 2005 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2006 NULL); 2007 } else { 2008 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2009 NULL); 2010 } 2011 return (stcb); 2012 } 2013 2014 /* 2015 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2016 * find all addresses that the sender has specified in any address list. Each 2017 * address will be used to lookup the TCB and see if one exits. 2018 */ 2019 static struct sctp_tcb * 2020 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2021 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2022 struct sockaddr *dst) 2023 { 2024 struct sctp_paramhdr *phdr, param_buf; 2025 #if defined(INET) || defined(INET6) 2026 struct sctp_tcb *stcb; 2027 uint16_t ptype; 2028 #endif 2029 uint16_t plen; 2030 #ifdef INET 2031 struct sockaddr_in sin4; 2032 #endif 2033 #ifdef INET6 2034 struct sockaddr_in6 sin6; 2035 #endif 2036 2037 #ifdef INET 2038 memset(&sin4, 0, sizeof(sin4)); 2039 sin4.sin_len = sizeof(sin4); 2040 sin4.sin_family = AF_INET; 2041 sin4.sin_port = sh->src_port; 2042 #endif 2043 #ifdef INET6 2044 memset(&sin6, 0, sizeof(sin6)); 2045 sin6.sin6_len = sizeof(sin6); 2046 sin6.sin6_family = AF_INET6; 2047 sin6.sin6_port = sh->src_port; 2048 #endif 2049 2050 offset += sizeof(struct sctp_init_chunk); 2051 2052 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2053 while (phdr != NULL) { 2054 /* now we must see if we want the parameter */ 2055 #if defined(INET) || defined(INET6) 2056 ptype = ntohs(phdr->param_type); 2057 #endif 2058 plen = ntohs(phdr->param_length); 2059 if (plen == 0) { 2060 break; 2061 } 2062 #ifdef INET 2063 if (ptype == SCTP_IPV4_ADDRESS && 2064 plen == sizeof(struct sctp_ipv4addr_param)) { 2065 /* Get the rest of the address */ 2066 struct sctp_ipv4addr_param ip4_param, *p4; 2067 2068 phdr = sctp_get_next_param(m, offset, 2069 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2070 if (phdr == NULL) { 2071 return (NULL); 2072 } 2073 p4 = (struct sctp_ipv4addr_param *)phdr; 2074 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2075 /* look it up */ 2076 stcb = sctp_findassociation_ep_addr(inp_p, 2077 (struct sockaddr *)&sin4, netp, dst, NULL); 2078 if (stcb != NULL) { 2079 return (stcb); 2080 } 2081 } 2082 #endif 2083 #ifdef INET6 2084 if (ptype == SCTP_IPV6_ADDRESS && 2085 plen == sizeof(struct sctp_ipv6addr_param)) { 2086 /* Get the rest of the address */ 2087 struct sctp_ipv6addr_param ip6_param, *p6; 2088 2089 phdr = sctp_get_next_param(m, offset, 2090 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2091 if (phdr == NULL) { 2092 return (NULL); 2093 } 2094 p6 = (struct sctp_ipv6addr_param *)phdr; 2095 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2096 /* look it up */ 2097 stcb = sctp_findassociation_ep_addr(inp_p, 2098 (struct sockaddr *)&sin6, netp, dst, NULL); 2099 if (stcb != NULL) { 2100 return (stcb); 2101 } 2102 } 2103 #endif 2104 offset += SCTP_SIZE32(plen); 2105 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2106 sizeof(param_buf)); 2107 } 2108 return (NULL); 2109 } 2110 2111 static struct sctp_tcb * 2112 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2113 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2114 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2115 { 2116 /* 2117 * Use my vtag to hash. If we find it we then verify the source addr 2118 * is in the assoc. If all goes well we save a bit on rec of a 2119 * packet. 2120 */ 2121 struct sctpasochead *head; 2122 struct sctp_nets *net; 2123 struct sctp_tcb *stcb; 2124 2125 SCTP_INP_INFO_RLOCK(); 2126 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2127 SCTP_BASE_INFO(hashasocmark))]; 2128 LIST_FOREACH(stcb, head, sctp_asocs) { 2129 SCTP_INP_RLOCK(stcb->sctp_ep); 2130 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2131 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2132 continue; 2133 } 2134 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2135 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2136 continue; 2137 } 2138 SCTP_TCB_LOCK(stcb); 2139 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2140 if (stcb->asoc.my_vtag == vtag) { 2141 /* candidate */ 2142 if (stcb->rport != rport) { 2143 SCTP_TCB_UNLOCK(stcb); 2144 continue; 2145 } 2146 if (stcb->sctp_ep->sctp_lport != lport) { 2147 SCTP_TCB_UNLOCK(stcb); 2148 continue; 2149 } 2150 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2151 SCTP_TCB_UNLOCK(stcb); 2152 continue; 2153 } 2154 /* RRS:Need toaddr check here */ 2155 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2156 /* Endpoint does not own this address */ 2157 SCTP_TCB_UNLOCK(stcb); 2158 continue; 2159 } 2160 if (remote_tag) { 2161 /* 2162 * If we have both vtags that's all we match 2163 * on 2164 */ 2165 if (stcb->asoc.peer_vtag == remote_tag) { 2166 /* 2167 * If both tags match we consider it 2168 * conclusive and check NO 2169 * source/destination addresses 2170 */ 2171 goto conclusive; 2172 } 2173 } 2174 if (skip_src_check) { 2175 conclusive: 2176 if (from) { 2177 *netp = sctp_findnet(stcb, from); 2178 } else { 2179 *netp = NULL; /* unknown */ 2180 } 2181 if (inp_p) 2182 *inp_p = stcb->sctp_ep; 2183 SCTP_INP_INFO_RUNLOCK(); 2184 return (stcb); 2185 } 2186 net = sctp_findnet(stcb, from); 2187 if (net) { 2188 /* yep its him. */ 2189 *netp = net; 2190 SCTP_STAT_INCR(sctps_vtagexpress); 2191 *inp_p = stcb->sctp_ep; 2192 SCTP_INP_INFO_RUNLOCK(); 2193 return (stcb); 2194 } else { 2195 /* 2196 * not him, this should only happen in rare 2197 * cases so I peg it. 2198 */ 2199 SCTP_STAT_INCR(sctps_vtagbogus); 2200 } 2201 } 2202 SCTP_TCB_UNLOCK(stcb); 2203 } 2204 SCTP_INP_INFO_RUNLOCK(); 2205 return (NULL); 2206 } 2207 2208 /* 2209 * Find an association with the pointer to the inbound IP packet. This can be 2210 * a IPv4 or IPv6 packet. 2211 */ 2212 struct sctp_tcb * 2213 sctp_findassociation_addr(struct mbuf *m, int offset, 2214 struct sockaddr *src, struct sockaddr *dst, 2215 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2216 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2217 { 2218 struct sctp_tcb *stcb; 2219 struct sctp_inpcb *inp; 2220 2221 if (sh->v_tag) { 2222 /* we only go down this path if vtag is non-zero */ 2223 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2224 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2225 if (stcb) { 2226 return (stcb); 2227 } 2228 } 2229 2230 if (inp_p) { 2231 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2232 1, vrf_id); 2233 inp = *inp_p; 2234 } else { 2235 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2236 1, vrf_id); 2237 } 2238 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2239 if (stcb == NULL && inp) { 2240 /* Found a EP but not this address */ 2241 if ((ch->chunk_type == SCTP_INITIATION) || 2242 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2243 /*- 2244 * special hook, we do NOT return linp or an 2245 * association that is linked to an existing 2246 * association that is under the TCP pool (i.e. no 2247 * listener exists). The endpoint finding routine 2248 * will always find a listener before examining the 2249 * TCP pool. 2250 */ 2251 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2252 if (inp_p) { 2253 *inp_p = NULL; 2254 } 2255 return (NULL); 2256 } 2257 stcb = sctp_findassociation_special_addr(m, 2258 offset, sh, &inp, netp, dst); 2259 if (inp_p != NULL) { 2260 *inp_p = inp; 2261 } 2262 } 2263 } 2264 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2265 return (stcb); 2266 } 2267 2268 /* 2269 * lookup an association by an ASCONF lookup address. 2270 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2271 */ 2272 struct sctp_tcb * 2273 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2274 struct sockaddr *dst, struct sctphdr *sh, 2275 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2276 { 2277 struct sctp_tcb *stcb; 2278 union sctp_sockstore remote_store; 2279 struct sctp_paramhdr param_buf, *phdr; 2280 int ptype; 2281 int zero_address = 0; 2282 #ifdef INET 2283 struct sockaddr_in *sin; 2284 #endif 2285 #ifdef INET6 2286 struct sockaddr_in6 *sin6; 2287 #endif 2288 2289 memset(&remote_store, 0, sizeof(remote_store)); 2290 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2291 ¶m_buf, sizeof(struct sctp_paramhdr)); 2292 if (phdr == NULL) { 2293 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2294 __func__); 2295 return NULL; 2296 } 2297 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2298 /* get the correlation address */ 2299 switch (ptype) { 2300 #ifdef INET6 2301 case SCTP_IPV6_ADDRESS: 2302 { 2303 /* ipv6 address param */ 2304 struct sctp_ipv6addr_param *p6, p6_buf; 2305 2306 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2307 return NULL; 2308 } 2309 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2310 offset + sizeof(struct sctp_asconf_chunk), 2311 &p6_buf.ph, sizeof(p6_buf)); 2312 if (p6 == NULL) { 2313 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2314 __func__); 2315 return (NULL); 2316 } 2317 sin6 = &remote_store.sin6; 2318 sin6->sin6_family = AF_INET6; 2319 sin6->sin6_len = sizeof(*sin6); 2320 sin6->sin6_port = sh->src_port; 2321 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2322 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2323 zero_address = 1; 2324 break; 2325 } 2326 #endif 2327 #ifdef INET 2328 case SCTP_IPV4_ADDRESS: 2329 { 2330 /* ipv4 address param */ 2331 struct sctp_ipv4addr_param *p4, p4_buf; 2332 2333 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2334 return NULL; 2335 } 2336 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2337 offset + sizeof(struct sctp_asconf_chunk), 2338 &p4_buf.ph, sizeof(p4_buf)); 2339 if (p4 == NULL) { 2340 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2341 __func__); 2342 return (NULL); 2343 } 2344 sin = &remote_store.sin; 2345 sin->sin_family = AF_INET; 2346 sin->sin_len = sizeof(*sin); 2347 sin->sin_port = sh->src_port; 2348 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2349 if (sin->sin_addr.s_addr == INADDR_ANY) 2350 zero_address = 1; 2351 break; 2352 } 2353 #endif 2354 default: 2355 /* invalid address param type */ 2356 return NULL; 2357 } 2358 2359 if (zero_address) { 2360 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2361 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2362 if (stcb != NULL) { 2363 SCTP_INP_DECR_REF(*inp_p); 2364 } 2365 } else { 2366 stcb = sctp_findassociation_ep_addr(inp_p, 2367 &remote_store.sa, netp, 2368 dst, NULL); 2369 } 2370 return (stcb); 2371 } 2372 2373 /* 2374 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2375 * addresses. This way if we don't get a bind we by default pick a ephemeral 2376 * port with all addresses bound. 2377 */ 2378 int 2379 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2380 { 2381 /* 2382 * we get called when a new endpoint starts up. We need to allocate 2383 * the sctp_inpcb structure from the zone and init it. Mark it as 2384 * unbound and find a port that we can use as an ephemeral with 2385 * INADDR_ANY. If the user binds later no problem we can then add in 2386 * the specific addresses. And setup the default parameters for the 2387 * EP. 2388 */ 2389 int i, error; 2390 struct sctp_inpcb *inp; 2391 struct sctp_pcb *m; 2392 struct timeval time; 2393 sctp_sharedkey_t *null_key; 2394 2395 error = 0; 2396 2397 SCTP_INP_INFO_WLOCK(); 2398 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2399 if (inp == NULL) { 2400 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2401 SCTP_INP_INFO_WUNLOCK(); 2402 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2403 return (ENOBUFS); 2404 } 2405 /* zap it */ 2406 memset(inp, 0, sizeof(*inp)); 2407 2408 /* bump generations */ 2409 /* setup socket pointers */ 2410 inp->sctp_socket = so; 2411 inp->ip_inp.inp.inp_socket = so; 2412 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2413 #ifdef INET6 2414 if (INP_SOCKAF(so) == AF_INET6) { 2415 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2416 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2417 } 2418 if (MODULE_GLOBAL(ip6_v6only)) { 2419 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2420 } 2421 } 2422 #endif 2423 inp->sctp_associd_counter = 1; 2424 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2425 inp->sctp_frag_point = 0; 2426 inp->max_cwnd = 0; 2427 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2428 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2429 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2430 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2431 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2432 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2433 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2434 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2435 inp->idata_supported = 0; 2436 2437 inp->fibnum = so->so_fibnum; 2438 /* init the small hash table we use to track asocid <-> tcb */ 2439 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2440 if (inp->sctp_asocidhash == NULL) { 2441 crfree(inp->ip_inp.inp.inp_cred); 2442 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2443 SCTP_INP_INFO_WUNLOCK(); 2444 return (ENOBUFS); 2445 } 2446 SCTP_INCR_EP_COUNT(); 2447 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2448 SCTP_INP_INFO_WUNLOCK(); 2449 2450 so->so_pcb = (caddr_t)inp; 2451 2452 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2453 /* UDP style socket */ 2454 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2455 SCTP_PCB_FLAGS_UNBOUND); 2456 /* Be sure it is NON-BLOCKING IO for UDP */ 2457 /* SCTP_SET_SO_NBIO(so); */ 2458 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2459 /* TCP style socket */ 2460 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2461 SCTP_PCB_FLAGS_UNBOUND); 2462 /* Be sure we have blocking IO by default */ 2463 SOCK_LOCK(so); 2464 SCTP_CLEAR_SO_NBIO(so); 2465 SOCK_UNLOCK(so); 2466 } else { 2467 /* 2468 * unsupported socket type (RAW, etc)- in case we missed it 2469 * in protosw 2470 */ 2471 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2472 so->so_pcb = NULL; 2473 crfree(inp->ip_inp.inp.inp_cred); 2474 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2475 return (EOPNOTSUPP); 2476 } 2477 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2478 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2479 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2480 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2481 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2482 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2483 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2484 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2485 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2486 } 2487 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2488 &inp->sctp_hashmark); 2489 if (inp->sctp_tcbhash == NULL) { 2490 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2491 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2492 so->so_pcb = NULL; 2493 crfree(inp->ip_inp.inp.inp_cred); 2494 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2495 return (ENOBUFS); 2496 } 2497 inp->def_vrf_id = vrf_id; 2498 2499 SCTP_INP_INFO_WLOCK(); 2500 SCTP_INP_LOCK_INIT(inp); 2501 rw_init_flags(&inp->ip_inp.inp.inp_lock, "sctpinp", 2502 RW_RECURSE | RW_DUPOK); 2503 SCTP_INP_READ_INIT(inp); 2504 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2505 /* lock the new ep */ 2506 SCTP_INP_WLOCK(inp); 2507 2508 /* add it to the info area */ 2509 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2510 SCTP_INP_INFO_WUNLOCK(); 2511 2512 TAILQ_INIT(&inp->read_queue); 2513 LIST_INIT(&inp->sctp_addr_list); 2514 2515 LIST_INIT(&inp->sctp_asoc_list); 2516 2517 #ifdef SCTP_TRACK_FREED_ASOCS 2518 /* TEMP CODE */ 2519 LIST_INIT(&inp->sctp_asoc_free_list); 2520 #endif 2521 /* Init the timer structure for signature change */ 2522 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2523 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2524 2525 /* now init the actual endpoint default data */ 2526 m = &inp->sctp_ep; 2527 2528 /* setup the base timeout information */ 2529 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2530 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2531 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2532 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2533 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2534 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2535 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2536 /* all max/min max are in ms */ 2537 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2538 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2539 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2540 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2541 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2542 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2543 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2544 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2545 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2546 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2547 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2548 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2549 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2550 2551 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2552 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2553 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2554 /* number of streams to pre-open on a association */ 2555 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2556 2557 m->default_mtu = 0; 2558 /* Add adaptation cookie */ 2559 m->adaptation_layer_indicator = 0; 2560 m->adaptation_layer_indicator_provided = 0; 2561 2562 /* seed random number generator */ 2563 m->random_counter = 1; 2564 m->store_at = SCTP_SIGNATURE_SIZE; 2565 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2566 sctp_fill_random_store(m); 2567 2568 /* Minimum cookie size */ 2569 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2570 sizeof(struct sctp_state_cookie); 2571 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2572 2573 /* Setup the initial secret */ 2574 (void)SCTP_GETTIME_TIMEVAL(&time); 2575 m->time_of_secret_change = (unsigned int)time.tv_sec; 2576 2577 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2578 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2579 } 2580 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2581 2582 /* How long is a cookie good for ? */ 2583 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2584 /* 2585 * Initialize authentication parameters 2586 */ 2587 m->local_hmacs = sctp_default_supported_hmaclist(); 2588 m->local_auth_chunks = sctp_alloc_chunklist(); 2589 if (inp->asconf_supported) { 2590 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2591 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2592 } 2593 m->default_dscp = 0; 2594 #ifdef INET6 2595 m->default_flowlabel = 0; 2596 #endif 2597 m->port = 0; /* encapsulation disabled by default */ 2598 LIST_INIT(&m->shared_keys); 2599 /* add default NULL key as key id 0 */ 2600 null_key = sctp_alloc_sharedkey(); 2601 sctp_insert_sharedkey(&m->shared_keys, null_key); 2602 SCTP_INP_WUNLOCK(inp); 2603 #ifdef SCTP_LOG_CLOSING 2604 sctp_log_closing(inp, NULL, 12); 2605 #endif 2606 return (error); 2607 } 2608 2609 void 2610 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2611 struct sctp_tcb *stcb) 2612 { 2613 struct sctp_nets *net; 2614 uint16_t lport, rport; 2615 struct sctppcbhead *head; 2616 struct sctp_laddr *laddr, *oladdr; 2617 2618 atomic_add_int(&stcb->asoc.refcnt, 1); 2619 SCTP_TCB_UNLOCK(stcb); 2620 SCTP_INP_INFO_WLOCK(); 2621 SCTP_INP_WLOCK(old_inp); 2622 SCTP_INP_WLOCK(new_inp); 2623 SCTP_TCB_LOCK(stcb); 2624 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2625 2626 #ifdef INET6 2627 if (old_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2628 new_inp->ip_inp.inp.inp_flags |= old_inp->ip_inp.inp.inp_flags & INP_CONTROLOPTS; 2629 if (old_inp->ip_inp.inp.in6p_outputopts) { 2630 new_inp->ip_inp.inp.in6p_outputopts = ip6_copypktopts(old_inp->ip_inp.inp.in6p_outputopts, M_NOWAIT); 2631 } 2632 } 2633 #endif 2634 #if defined(INET) && defined(INET6) 2635 else 2636 #endif 2637 #ifdef INET 2638 { 2639 new_inp->ip_inp.inp.inp_ip_tos = old_inp->ip_inp.inp.inp_ip_tos; 2640 new_inp->ip_inp.inp.inp_ip_ttl = old_inp->ip_inp.inp.inp_ip_ttl; 2641 } 2642 #endif 2643 new_inp->sctp_ep.time_of_secret_change = 2644 old_inp->sctp_ep.time_of_secret_change; 2645 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2646 sizeof(old_inp->sctp_ep.secret_key)); 2647 new_inp->sctp_ep.current_secret_number = 2648 old_inp->sctp_ep.current_secret_number; 2649 new_inp->sctp_ep.last_secret_number = 2650 old_inp->sctp_ep.last_secret_number; 2651 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2652 2653 /* make it so new data pours into the new socket */ 2654 stcb->sctp_socket = new_inp->sctp_socket; 2655 stcb->sctp_ep = new_inp; 2656 2657 /* Copy the port across */ 2658 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2659 rport = stcb->rport; 2660 /* Pull the tcb from the old association */ 2661 LIST_REMOVE(stcb, sctp_tcbhash); 2662 LIST_REMOVE(stcb, sctp_tcblist); 2663 if (stcb->asoc.in_asocid_hash) { 2664 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2665 } 2666 /* Now insert the new_inp into the TCP connected hash */ 2667 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2668 2669 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2670 /* Its safe to access */ 2671 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2672 2673 /* Now move the tcb into the endpoint list */ 2674 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2675 /* 2676 * Question, do we even need to worry about the ep-hash since we 2677 * only have one connection? Probably not :> so lets get rid of it 2678 * and not suck up any kernel memory in that. 2679 */ 2680 if (stcb->asoc.in_asocid_hash) { 2681 struct sctpasochead *lhd; 2682 2683 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2684 new_inp->hashasocidmark)]; 2685 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2686 } 2687 /* Ok. Let's restart timer. */ 2688 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2689 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2690 stcb, net); 2691 } 2692 2693 SCTP_INP_INFO_WUNLOCK(); 2694 if (new_inp->sctp_tcbhash != NULL) { 2695 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2696 new_inp->sctp_tcbhash = NULL; 2697 } 2698 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2699 /* Subset bound, so copy in the laddr list from the old_inp */ 2700 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2701 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2702 if (laddr == NULL) { 2703 /* 2704 * Gak, what can we do? This assoc is really 2705 * HOSED. We probably should send an abort 2706 * here. 2707 */ 2708 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2709 continue; 2710 } 2711 SCTP_INCR_LADDR_COUNT(); 2712 memset(laddr, 0, sizeof(*laddr)); 2713 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2714 laddr->ifa = oladdr->ifa; 2715 atomic_add_int(&laddr->ifa->refcount, 1); 2716 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2717 sctp_nxt_addr); 2718 new_inp->laddr_count++; 2719 if (oladdr == stcb->asoc.last_used_address) { 2720 stcb->asoc.last_used_address = laddr; 2721 } 2722 } 2723 } 2724 /* Now any running timers need to be adjusted. */ 2725 if (stcb->asoc.dack_timer.ep == old_inp) { 2726 SCTP_INP_DECR_REF(old_inp); 2727 stcb->asoc.dack_timer.ep = new_inp; 2728 SCTP_INP_INCR_REF(new_inp); 2729 } 2730 if (stcb->asoc.asconf_timer.ep == old_inp) { 2731 SCTP_INP_DECR_REF(old_inp); 2732 stcb->asoc.asconf_timer.ep = new_inp; 2733 SCTP_INP_INCR_REF(new_inp); 2734 } 2735 if (stcb->asoc.strreset_timer.ep == old_inp) { 2736 SCTP_INP_DECR_REF(old_inp); 2737 stcb->asoc.strreset_timer.ep = new_inp; 2738 SCTP_INP_INCR_REF(new_inp); 2739 } 2740 if (stcb->asoc.shut_guard_timer.ep == old_inp) { 2741 SCTP_INP_DECR_REF(old_inp); 2742 stcb->asoc.shut_guard_timer.ep = new_inp; 2743 SCTP_INP_INCR_REF(new_inp); 2744 } 2745 if (stcb->asoc.autoclose_timer.ep == old_inp) { 2746 SCTP_INP_DECR_REF(old_inp); 2747 stcb->asoc.autoclose_timer.ep = new_inp; 2748 SCTP_INP_INCR_REF(new_inp); 2749 } 2750 if (stcb->asoc.delete_prim_timer.ep == old_inp) { 2751 SCTP_INP_DECR_REF(old_inp); 2752 stcb->asoc.delete_prim_timer.ep = new_inp; 2753 SCTP_INP_INCR_REF(new_inp); 2754 } 2755 /* now what about the nets? */ 2756 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2757 if (net->pmtu_timer.ep == old_inp) { 2758 SCTP_INP_DECR_REF(old_inp); 2759 net->pmtu_timer.ep = new_inp; 2760 SCTP_INP_INCR_REF(new_inp); 2761 } 2762 if (net->hb_timer.ep == old_inp) { 2763 SCTP_INP_DECR_REF(old_inp); 2764 net->hb_timer.ep = new_inp; 2765 SCTP_INP_INCR_REF(new_inp); 2766 } 2767 if (net->rxt_timer.ep == old_inp) { 2768 SCTP_INP_DECR_REF(old_inp); 2769 net->rxt_timer.ep = new_inp; 2770 SCTP_INP_INCR_REF(new_inp); 2771 } 2772 } 2773 SCTP_INP_WUNLOCK(new_inp); 2774 SCTP_INP_WUNLOCK(old_inp); 2775 } 2776 2777 /* 2778 * insert an laddr entry with the given ifa for the desired list 2779 */ 2780 static int 2781 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2782 { 2783 struct sctp_laddr *laddr; 2784 2785 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2786 if (laddr == NULL) { 2787 /* out of memory? */ 2788 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2789 return (EINVAL); 2790 } 2791 SCTP_INCR_LADDR_COUNT(); 2792 memset(laddr, 0, sizeof(*laddr)); 2793 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2794 laddr->ifa = ifa; 2795 laddr->action = act; 2796 atomic_add_int(&ifa->refcount, 1); 2797 /* insert it */ 2798 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2799 2800 return (0); 2801 } 2802 2803 /* 2804 * Remove an laddr entry from the local address list (on an assoc) 2805 */ 2806 static void 2807 sctp_remove_laddr(struct sctp_laddr *laddr) 2808 { 2809 2810 /* remove from the list */ 2811 LIST_REMOVE(laddr, sctp_nxt_addr); 2812 sctp_free_ifa(laddr->ifa); 2813 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2814 SCTP_DECR_LADDR_COUNT(); 2815 } 2816 2817 /* 2818 * Bind the socket, with the PCB and global info locks held. Note, if a 2819 * socket address is specified, the PCB lock may be dropped and re-acquired. 2820 * 2821 * sctp_ifap is used to bypass normal local address validation checks. 2822 */ 2823 int 2824 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr, 2825 struct sctp_ifa *sctp_ifap, struct thread *td) 2826 { 2827 /* bind a ep to a socket address */ 2828 struct sctppcbhead *head; 2829 struct sctp_inpcb *inp_tmp; 2830 struct inpcb *ip_inp; 2831 int port_reuse_active = 0; 2832 int bindall; 2833 uint16_t lport; 2834 int error; 2835 uint32_t vrf_id; 2836 2837 KASSERT(td != NULL, ("%s: null thread", __func__)); 2838 2839 error = 0; 2840 lport = 0; 2841 bindall = 1; 2842 ip_inp = &inp->ip_inp.inp; 2843 2844 SCTP_INP_INFO_WLOCK_ASSERT(); 2845 SCTP_INP_WLOCK_ASSERT(inp); 2846 2847 #ifdef SCTP_DEBUG 2848 if (addr) { 2849 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2850 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2851 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2852 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2853 } 2854 #endif 2855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2856 error = EINVAL; 2857 /* already did a bind, subsequent binds NOT allowed ! */ 2858 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2859 goto out; 2860 } 2861 if (addr != NULL) { 2862 switch (addr->sa_family) { 2863 #ifdef INET 2864 case AF_INET: 2865 { 2866 struct sockaddr_in *sin; 2867 2868 /* IPV6_V6ONLY socket? */ 2869 if (SCTP_IPV6_V6ONLY(inp)) { 2870 error = EINVAL; 2871 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2872 goto out; 2873 } 2874 if (addr->sa_len != sizeof(*sin)) { 2875 error = EINVAL; 2876 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2877 goto out; 2878 } 2879 2880 sin = (struct sockaddr_in *)addr; 2881 lport = sin->sin_port; 2882 /* 2883 * For LOOPBACK the prison_local_ip4() call 2884 * will transmute the ip address to the 2885 * proper value. 2886 */ 2887 if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) { 2888 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2889 goto out; 2890 } 2891 if (sin->sin_addr.s_addr != INADDR_ANY) { 2892 bindall = 0; 2893 } 2894 break; 2895 } 2896 #endif 2897 #ifdef INET6 2898 case AF_INET6: 2899 { 2900 /* 2901 * Only for pure IPv6 Address. (No IPv4 2902 * Mapped!) 2903 */ 2904 struct sockaddr_in6 *sin6; 2905 2906 sin6 = (struct sockaddr_in6 *)addr; 2907 if (addr->sa_len != sizeof(*sin6)) { 2908 error = EINVAL; 2909 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2910 goto out; 2911 } 2912 lport = sin6->sin6_port; 2913 /* 2914 * For LOOPBACK the prison_local_ip6() call 2915 * will transmute the ipv6 address to the 2916 * proper value. 2917 */ 2918 if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr, 2919 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2920 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2921 goto out; 2922 } 2923 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2924 bindall = 0; 2925 /* KAME hack: embed scopeid */ 2926 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2927 error = EINVAL; 2928 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2929 goto out; 2930 } 2931 } 2932 /* this must be cleared for ifa_ifwithaddr() */ 2933 sin6->sin6_scope_id = 0; 2934 break; 2935 } 2936 #endif 2937 default: 2938 error = EAFNOSUPPORT; 2939 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2940 goto out; 2941 } 2942 } 2943 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2944 vrf_id = inp->def_vrf_id; 2945 2946 if (lport) { 2947 /* 2948 * Did the caller specify a port? if so we must see if an ep 2949 * already has this one bound. 2950 */ 2951 /* got to be root to get at low ports */ 2952 if (ntohs(lport) < IPPORT_RESERVED && 2953 (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 2954 goto out; 2955 } 2956 SCTP_INP_INCR_REF(inp); 2957 SCTP_INP_WUNLOCK(inp); 2958 if (bindall) { 2959 vrf_id = inp->def_vrf_id; 2960 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2961 if (inp_tmp != NULL) { 2962 /* 2963 * lock guy returned and lower count note 2964 * that we are not bound so inp_tmp should 2965 * NEVER be inp. And it is this inp 2966 * (inp_tmp) that gets the reference bump, 2967 * so we must lower it. 2968 */ 2969 SCTP_INP_DECR_REF(inp_tmp); 2970 /* unlock info */ 2971 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2972 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2973 /* 2974 * Ok, must be one-2-one and 2975 * allowing port re-use 2976 */ 2977 port_reuse_active = 1; 2978 goto continue_anyway; 2979 } 2980 SCTP_INP_WLOCK(inp); 2981 SCTP_INP_DECR_REF(inp); 2982 error = EADDRINUSE; 2983 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2984 goto out; 2985 } 2986 } else { 2987 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2988 if (inp_tmp != NULL) { 2989 /* 2990 * lock guy returned and lower count note 2991 * that we are not bound so inp_tmp should 2992 * NEVER be inp. And it is this inp 2993 * (inp_tmp) that gets the reference bump, 2994 * so we must lower it. 2995 */ 2996 SCTP_INP_DECR_REF(inp_tmp); 2997 /* unlock info */ 2998 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2999 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3000 /* 3001 * Ok, must be one-2-one and 3002 * allowing port re-use 3003 */ 3004 port_reuse_active = 1; 3005 goto continue_anyway; 3006 } 3007 SCTP_INP_WLOCK(inp); 3008 SCTP_INP_DECR_REF(inp); 3009 error = EADDRINUSE; 3010 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3011 goto out; 3012 } 3013 } 3014 continue_anyway: 3015 SCTP_INP_WLOCK(inp); 3016 SCTP_INP_DECR_REF(inp); 3017 if (bindall) { 3018 /* verify that no lport is not used by a singleton */ 3019 if ((port_reuse_active == 0) && 3020 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3021 /* Sorry someone already has this one bound */ 3022 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3023 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3024 port_reuse_active = 1; 3025 } else { 3026 error = EADDRINUSE; 3027 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3028 goto out; 3029 } 3030 } 3031 } 3032 } else { 3033 uint16_t first, last, candidate; 3034 uint16_t count; 3035 3036 if (ip_inp->inp_flags & INP_HIGHPORT) { 3037 first = MODULE_GLOBAL(ipport_hifirstauto); 3038 last = MODULE_GLOBAL(ipport_hilastauto); 3039 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3040 if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 3041 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3042 goto out; 3043 } 3044 first = MODULE_GLOBAL(ipport_lowfirstauto); 3045 last = MODULE_GLOBAL(ipport_lowlastauto); 3046 } else { 3047 first = MODULE_GLOBAL(ipport_firstauto); 3048 last = MODULE_GLOBAL(ipport_lastauto); 3049 } 3050 if (first > last) { 3051 uint16_t temp; 3052 3053 temp = first; 3054 first = last; 3055 last = temp; 3056 } 3057 count = last - first + 1; /* number of candidates */ 3058 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3059 3060 for (;;) { 3061 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3062 lport = htons(candidate); 3063 break; 3064 } 3065 if (--count == 0) { 3066 error = EADDRINUSE; 3067 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3068 goto out; 3069 } 3070 if (candidate == last) 3071 candidate = first; 3072 else 3073 candidate = candidate + 1; 3074 } 3075 } 3076 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3077 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3078 /* 3079 * this really should not happen. The guy did a non-blocking 3080 * bind and then did a close at the same time. 3081 */ 3082 error = EINVAL; 3083 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3084 goto out; 3085 } 3086 /* ok we look clear to give out this port, so lets setup the binding */ 3087 if (bindall) { 3088 /* binding to all addresses, so just set in the proper flags */ 3089 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3090 /* set the automatic addr changes from kernel flag */ 3091 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3092 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3093 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3094 } else { 3095 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3096 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3097 } 3098 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3099 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3100 } else { 3101 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3102 } 3103 /* 3104 * set the automatic mobility_base from kernel flag (by 3105 * micchie) 3106 */ 3107 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3109 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3110 } else { 3111 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3112 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3113 } 3114 /* 3115 * set the automatic mobility_fasthandoff from kernel flag 3116 * (by micchie) 3117 */ 3118 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3119 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3120 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3121 } else { 3122 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3123 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3124 } 3125 } else { 3126 /* 3127 * bind specific, make sure flags is off and add a new 3128 * address structure to the sctp_addr_list inside the ep 3129 * structure. 3130 * 3131 * We will need to allocate one and insert it at the head. 3132 * The socketopt call can just insert new addresses in there 3133 * as well. It will also have to do the embed scope kame 3134 * hack too (before adding). 3135 */ 3136 struct sctp_ifa *ifa; 3137 union sctp_sockstore store; 3138 3139 memset(&store, 0, sizeof(store)); 3140 switch (addr->sa_family) { 3141 #ifdef INET 3142 case AF_INET: 3143 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3144 store.sin.sin_port = 0; 3145 break; 3146 #endif 3147 #ifdef INET6 3148 case AF_INET6: 3149 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3150 store.sin6.sin6_port = 0; 3151 break; 3152 #endif 3153 default: 3154 break; 3155 } 3156 /* 3157 * first find the interface with the bound address need to 3158 * zero out the port to find the address! yuck! can't do 3159 * this earlier since need port for sctp_pcb_findep() 3160 */ 3161 if (sctp_ifap != NULL) { 3162 ifa = sctp_ifap; 3163 } else { 3164 /* 3165 * Note for BSD we hit here always other O/S's will 3166 * pass things in via the sctp_ifap argument. 3167 */ 3168 ifa = sctp_find_ifa_by_addr(&store.sa, 3169 vrf_id, SCTP_ADDR_NOT_LOCKED); 3170 } 3171 if (ifa == NULL) { 3172 error = EADDRNOTAVAIL; 3173 /* Can't find an interface with that address */ 3174 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3175 goto out; 3176 } 3177 #ifdef INET6 3178 if (addr->sa_family == AF_INET6) { 3179 /* GAK, more FIXME IFA lock? */ 3180 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3181 /* Can't bind a non-existent addr. */ 3182 error = EINVAL; 3183 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3184 goto out; 3185 } 3186 } 3187 #endif 3188 /* we're not bound all */ 3189 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3190 /* allow bindx() to send ASCONF's for binding changes */ 3191 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3192 /* clear automatic addr changes from kernel flag */ 3193 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3194 3195 /* add this address to the endpoint list */ 3196 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3197 if (error != 0) 3198 goto out; 3199 inp->laddr_count++; 3200 } 3201 /* find the bucket */ 3202 if (port_reuse_active) { 3203 /* Put it into tcp 1-2-1 hash */ 3204 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3205 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3206 } else { 3207 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3208 } 3209 /* put it in the bucket */ 3210 LIST_INSERT_HEAD(head, inp, sctp_hash); 3211 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3212 (void *)head, ntohs(lport), port_reuse_active); 3213 /* set in the port */ 3214 inp->sctp_lport = lport; 3215 3216 /* turn off just the unbound flag */ 3217 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0, 3218 ("%s: inp %p is already bound", __func__, inp)); 3219 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3220 out: 3221 return (error); 3222 } 3223 3224 int 3225 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 3226 struct sctp_ifa *sctp_ifap, struct thread *td) 3227 { 3228 struct sctp_inpcb *inp; 3229 int error; 3230 3231 inp = so->so_pcb; 3232 SCTP_INP_INFO_WLOCK(); 3233 SCTP_INP_WLOCK(inp); 3234 error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td); 3235 SCTP_INP_WUNLOCK(inp); 3236 SCTP_INP_INFO_WUNLOCK(); 3237 return (error); 3238 } 3239 3240 static void 3241 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3242 { 3243 struct sctp_iterator *it, *nit; 3244 3245 /* 3246 * We enter with the only the ITERATOR_LOCK in place and a write 3247 * lock on the inp_info stuff. 3248 */ 3249 it = sctp_it_ctl.cur_it; 3250 if (it && (it->vn != curvnet)) { 3251 /* Its not looking at our VNET */ 3252 return; 3253 } 3254 if (it && (it->inp == inp)) { 3255 /* 3256 * This is tricky and we hold the iterator lock, but when it 3257 * returns and gets the lock (when we release it) the 3258 * iterator will try to operate on inp. We need to stop that 3259 * from happening. But of course the iterator has a 3260 * reference on the stcb and inp. We can mark it and it will 3261 * stop. 3262 * 3263 * If its a single iterator situation, we set the end 3264 * iterator flag. Otherwise we set the iterator to go to the 3265 * next inp. 3266 * 3267 */ 3268 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3269 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3270 } else { 3271 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3272 } 3273 } 3274 /* 3275 * Now go through and remove any single reference to our inp that 3276 * may be still pending on the list 3277 */ 3278 SCTP_IPI_ITERATOR_WQ_LOCK(); 3279 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3280 if (it->vn != curvnet) { 3281 continue; 3282 } 3283 if (it->inp == inp) { 3284 /* This one points to me is it inp specific? */ 3285 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3286 /* Remove and free this one */ 3287 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3288 it, sctp_nxt_itr); 3289 if (it->function_atend != NULL) { 3290 (*it->function_atend) (it->pointer, it->val); 3291 } 3292 SCTP_FREE(it, SCTP_M_ITER); 3293 } else { 3294 it->inp = LIST_NEXT(it->inp, sctp_list); 3295 if (it->inp) { 3296 SCTP_INP_INCR_REF(it->inp); 3297 } 3298 } 3299 /* 3300 * When its put in the refcnt is incremented so decr 3301 * it 3302 */ 3303 SCTP_INP_DECR_REF(inp); 3304 } 3305 } 3306 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3307 } 3308 3309 /* release sctp_inpcb unbind the port */ 3310 void 3311 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3312 { 3313 /* 3314 * Here we free a endpoint. We must find it (if it is in the Hash 3315 * table) and remove it from there. Then we must also find it in the 3316 * overall list and remove it from there. After all removals are 3317 * complete then any timer has to be stopped. Then start the actual 3318 * freeing. a) Any local lists. b) Any associations. c) The hash of 3319 * all associations. d) finally the ep itself. 3320 */ 3321 struct sctp_tcb *asoc, *nasoc; 3322 struct sctp_laddr *laddr, *nladdr; 3323 struct inpcb *ip_pcb; 3324 struct socket *so; 3325 int being_refed = 0; 3326 struct sctp_queued_to_read *sq, *nsq; 3327 int cnt; 3328 sctp_sharedkey_t *shared_key, *nshared_key; 3329 3330 #ifdef SCTP_LOG_CLOSING 3331 sctp_log_closing(inp, NULL, 0); 3332 #endif 3333 SCTP_ITERATOR_LOCK(); 3334 /* mark any iterators on the list or being processed */ 3335 sctp_iterator_inp_being_freed(inp); 3336 SCTP_ITERATOR_UNLOCK(); 3337 3338 SCTP_ASOC_CREATE_LOCK(inp); 3339 SCTP_INP_INFO_WLOCK(); 3340 SCTP_INP_WLOCK(inp); 3341 so = inp->sctp_socket; 3342 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0, 3343 ("%s: inp %p still has socket", __func__, inp)); 3344 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0, 3345 ("%s: double free of inp %p", __func__, inp)); 3346 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3347 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3348 /* socket is gone, so no more wakeups allowed */ 3349 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3350 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3351 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3352 } 3353 /* First time through we have the socket lock, after that no more. */ 3354 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3355 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3356 3357 if (inp->control) { 3358 sctp_m_freem(inp->control); 3359 inp->control = NULL; 3360 } 3361 if (inp->pkt) { 3362 sctp_m_freem(inp->pkt); 3363 inp->pkt = NULL; 3364 } 3365 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3366 * here but I will be nice :> (i.e. 3367 * ip_pcb = ep;) */ 3368 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3369 int cnt_in_sd; 3370 3371 cnt_in_sd = 0; 3372 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3373 SCTP_TCB_LOCK(asoc); 3374 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3375 asoc->sctp_socket = NULL; 3376 /* Skip guys being freed */ 3377 cnt_in_sd++; 3378 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3379 /* 3380 * Special case - we did not start a 3381 * kill timer on the asoc due to it 3382 * was not closed. So go ahead and 3383 * start it now. 3384 */ 3385 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3386 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3387 } 3388 SCTP_TCB_UNLOCK(asoc); 3389 continue; 3390 } 3391 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3392 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3393 (asoc->asoc.total_output_queue_size == 0)) { 3394 /* 3395 * If we have data in queue, we don't want 3396 * to just free since the app may have done, 3397 * send()/close or connect/send/close. And 3398 * it wants the data to get across first. 3399 */ 3400 /* Just abandon things in the front states */ 3401 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3402 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3403 cnt_in_sd++; 3404 } 3405 continue; 3406 } 3407 /* Disconnect the socket please */ 3408 asoc->sctp_socket = NULL; 3409 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3410 if ((asoc->asoc.size_on_reasm_queue > 0) || 3411 (asoc->asoc.control_pdapi) || 3412 (asoc->asoc.size_on_all_streams > 0) || 3413 (so && (so->so_rcv.sb_cc > 0))) { 3414 /* Left with Data unread */ 3415 struct mbuf *op_err; 3416 3417 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3418 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3419 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3420 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3421 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3422 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3423 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3424 } 3425 if (sctp_free_assoc(inp, asoc, 3426 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3427 cnt_in_sd++; 3428 } 3429 continue; 3430 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3431 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3432 (asoc->asoc.stream_queue_cnt == 0)) { 3433 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3434 goto abort_anyway; 3435 } 3436 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3437 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3438 struct sctp_nets *netp; 3439 3440 /* 3441 * there is nothing queued to send, 3442 * so I send shutdown 3443 */ 3444 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3445 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3446 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3447 } 3448 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3449 sctp_stop_timers_for_shutdown(asoc); 3450 if (asoc->asoc.alternate) { 3451 netp = asoc->asoc.alternate; 3452 } else { 3453 netp = asoc->asoc.primary_destination; 3454 } 3455 sctp_send_shutdown(asoc, netp); 3456 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3457 netp); 3458 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3459 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3460 } 3461 } else { 3462 /* mark into shutdown pending */ 3463 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3464 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3465 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3466 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3467 } 3468 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3469 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3470 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3471 struct mbuf *op_err; 3472 3473 abort_anyway: 3474 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3475 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3476 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3477 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3478 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3479 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3480 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3481 } 3482 if (sctp_free_assoc(inp, asoc, 3483 SCTP_PCBFREE_NOFORCE, 3484 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3485 cnt_in_sd++; 3486 } 3487 continue; 3488 } else { 3489 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3490 } 3491 } 3492 cnt_in_sd++; 3493 SCTP_TCB_UNLOCK(asoc); 3494 } 3495 /* now is there some left in our SHUTDOWN state? */ 3496 if (cnt_in_sd) { 3497 #ifdef SCTP_LOG_CLOSING 3498 sctp_log_closing(inp, NULL, 2); 3499 #endif 3500 inp->sctp_socket = NULL; 3501 SCTP_INP_WUNLOCK(inp); 3502 SCTP_ASOC_CREATE_UNLOCK(inp); 3503 SCTP_INP_INFO_WUNLOCK(); 3504 return; 3505 } 3506 } 3507 inp->sctp_socket = NULL; 3508 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3509 SCTP_PCB_FLAGS_UNBOUND) { 3510 /* 3511 * ok, this guy has been bound. It's port is somewhere in 3512 * the SCTP_BASE_INFO(hash table). Remove it! 3513 */ 3514 LIST_REMOVE(inp, sctp_hash); 3515 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3516 } 3517 3518 /* 3519 * If there is a timer running to kill us, forget it, since it may 3520 * have a contest on the INP lock.. which would cause us to die ... 3521 */ 3522 cnt = 0; 3523 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3524 SCTP_TCB_LOCK(asoc); 3525 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3526 /* Disconnect the socket please */ 3527 asoc->sctp_socket = NULL; 3528 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3529 } 3530 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3531 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3532 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3533 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3534 } 3535 cnt++; 3536 SCTP_TCB_UNLOCK(asoc); 3537 continue; 3538 } 3539 /* Free associations that are NOT killing us */ 3540 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3541 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3542 struct mbuf *op_err; 3543 3544 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3545 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3546 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3547 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3548 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3549 cnt++; 3550 SCTP_TCB_UNLOCK(asoc); 3551 continue; 3552 } 3553 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3554 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3555 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3556 } 3557 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3558 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3559 cnt++; 3560 } 3561 } 3562 if (cnt) { 3563 /* Ok we have someone out there that will kill us */ 3564 #ifdef SCTP_LOG_CLOSING 3565 sctp_log_closing(inp, NULL, 3); 3566 #endif 3567 SCTP_INP_WUNLOCK(inp); 3568 SCTP_ASOC_CREATE_UNLOCK(inp); 3569 SCTP_INP_INFO_WUNLOCK(); 3570 return; 3571 } 3572 if (SCTP_INP_LOCK_CONTENDED(inp)) 3573 being_refed++; 3574 if (SCTP_INP_READ_CONTENDED(inp)) 3575 being_refed++; 3576 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3577 being_refed++; 3578 /* NOTE: 0 refcount also means no timers are referencing us. */ 3579 if ((inp->refcount) || 3580 (being_refed) || 3581 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3582 #ifdef SCTP_LOG_CLOSING 3583 sctp_log_closing(inp, NULL, 4); 3584 #endif 3585 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3586 SCTP_INP_WUNLOCK(inp); 3587 SCTP_ASOC_CREATE_UNLOCK(inp); 3588 SCTP_INP_INFO_WUNLOCK(); 3589 return; 3590 } 3591 inp->sctp_ep.signature_change.type = 0; 3592 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3593 /* 3594 * Remove it from the list .. last thing we need a lock for. 3595 */ 3596 LIST_REMOVE(inp, sctp_list); 3597 SCTP_INP_WUNLOCK(inp); 3598 SCTP_ASOC_CREATE_UNLOCK(inp); 3599 SCTP_INP_INFO_WUNLOCK(); 3600 3601 #ifdef SCTP_LOG_CLOSING 3602 sctp_log_closing(inp, NULL, 5); 3603 #endif 3604 if ((inp->sctp_asocidhash) != NULL) { 3605 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3606 inp->sctp_asocidhash = NULL; 3607 } 3608 /* sa_ignore FREED_MEMORY */ 3609 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3610 /* Its only abandoned if it had data left */ 3611 if (sq->length) 3612 SCTP_STAT_INCR(sctps_left_abandon); 3613 3614 TAILQ_REMOVE(&inp->read_queue, sq, next); 3615 sctp_free_remote_addr(sq->whoFrom); 3616 if (so) 3617 so->so_rcv.sb_cc -= sq->length; 3618 if (sq->data) { 3619 sctp_m_freem(sq->data); 3620 sq->data = NULL; 3621 } 3622 /* 3623 * no need to free the net count, since at this point all 3624 * assoc's are gone. 3625 */ 3626 sctp_free_a_readq(NULL, sq); 3627 } 3628 /* Now the sctp_pcb things */ 3629 /* 3630 * free each asoc if it is not already closed/free. we can't use the 3631 * macro here since le_next will get freed as part of the 3632 * sctp_free_assoc() call. 3633 */ 3634 if (ip_pcb->inp_options) { 3635 (void)sctp_m_free(ip_pcb->inp_options); 3636 ip_pcb->inp_options = 0; 3637 } 3638 #ifdef INET6 3639 if (ip_pcb->inp_vflag & INP_IPV6) { 3640 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3641 } 3642 #endif /* INET6 */ 3643 ip_pcb->inp_vflag = 0; 3644 /* free up authentication fields */ 3645 if (inp->sctp_ep.local_auth_chunks != NULL) 3646 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3647 if (inp->sctp_ep.local_hmacs != NULL) 3648 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3649 3650 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3651 LIST_REMOVE(shared_key, next); 3652 sctp_free_sharedkey(shared_key); 3653 /* sa_ignore FREED_MEMORY */ 3654 } 3655 3656 /* 3657 * if we have an address list the following will free the list of 3658 * ifaddr's that are set into this ep. Again macro limitations here, 3659 * since the LIST_FOREACH could be a bad idea. 3660 */ 3661 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3662 sctp_remove_laddr(laddr); 3663 } 3664 3665 #ifdef SCTP_TRACK_FREED_ASOCS 3666 /* TEMP CODE */ 3667 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3668 LIST_REMOVE(asoc, sctp_tcblist); 3669 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3670 SCTP_DECR_ASOC_COUNT(); 3671 } 3672 /* *** END TEMP CODE *** */ 3673 #endif 3674 /* Now lets see about freeing the EP hash table. */ 3675 if (inp->sctp_tcbhash != NULL) { 3676 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3677 inp->sctp_tcbhash = NULL; 3678 } 3679 /* Now we must put the ep memory back into the zone pool */ 3680 crfree(inp->ip_inp.inp.inp_cred); 3681 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3682 SCTP_INP_LOCK_DESTROY(inp); 3683 SCTP_INP_READ_DESTROY(inp); 3684 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3685 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3686 SCTP_DECR_EP_COUNT(); 3687 } 3688 3689 struct sctp_nets * 3690 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3691 { 3692 struct sctp_nets *net; 3693 3694 /* locate the address */ 3695 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3696 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3697 return (net); 3698 } 3699 return (NULL); 3700 } 3701 3702 int 3703 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3704 { 3705 struct sctp_ifa *sctp_ifa; 3706 3707 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3708 if (sctp_ifa) { 3709 return (1); 3710 } else { 3711 return (0); 3712 } 3713 } 3714 3715 /* 3716 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3717 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3718 * stats of stuff. 3719 */ 3720 int 3721 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3722 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3723 { 3724 /* 3725 * The following is redundant to the same lines in the 3726 * sctp_aloc_assoc() but is needed since others call the add address 3727 * function 3728 */ 3729 struct sctp_nets *net, *netfirst; 3730 int addr_inscope; 3731 3732 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3733 from); 3734 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3735 3736 netfirst = sctp_findnet(stcb, newaddr); 3737 if (netfirst) { 3738 /* 3739 * Lie and return ok, we don't want to make the association 3740 * go away for this behavior. It will happen in the TCP 3741 * model in a connected socket. It does not reach the hash 3742 * table until after the association is built so it can't be 3743 * found. Mark as reachable, since the initial creation will 3744 * have been cleared and the NOT_IN_ASSOC flag will have 3745 * been added... and we don't want to end up removing it 3746 * back out. 3747 */ 3748 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3749 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3750 SCTP_ADDR_UNCONFIRMED); 3751 } else { 3752 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3753 } 3754 3755 return (0); 3756 } 3757 addr_inscope = 1; 3758 switch (newaddr->sa_family) { 3759 #ifdef INET 3760 case AF_INET: 3761 { 3762 struct sockaddr_in *sin; 3763 3764 sin = (struct sockaddr_in *)newaddr; 3765 if (sin->sin_addr.s_addr == 0) { 3766 /* Invalid address */ 3767 return (-1); 3768 } 3769 /* zero out the zero area */ 3770 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3771 3772 /* assure len is set */ 3773 sin->sin_len = sizeof(struct sockaddr_in); 3774 if (set_scope) { 3775 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3776 stcb->asoc.scope.ipv4_local_scope = 1; 3777 } 3778 } else { 3779 /* Validate the address is in scope */ 3780 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3781 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3782 addr_inscope = 0; 3783 } 3784 } 3785 break; 3786 } 3787 #endif 3788 #ifdef INET6 3789 case AF_INET6: 3790 { 3791 struct sockaddr_in6 *sin6; 3792 3793 sin6 = (struct sockaddr_in6 *)newaddr; 3794 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3795 /* Invalid address */ 3796 return (-1); 3797 } 3798 /* assure len is set */ 3799 sin6->sin6_len = sizeof(struct sockaddr_in6); 3800 if (set_scope) { 3801 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3802 stcb->asoc.scope.loopback_scope = 1; 3803 stcb->asoc.scope.local_scope = 0; 3804 stcb->asoc.scope.ipv4_local_scope = 1; 3805 stcb->asoc.scope.site_scope = 1; 3806 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3807 /* 3808 * If the new destination is a 3809 * LINK_LOCAL we must have common 3810 * site scope. Don't set the local 3811 * scope since we may not share all 3812 * links, only loopback can do this. 3813 * Links on the local network would 3814 * also be on our private network 3815 * for v4 too. 3816 */ 3817 stcb->asoc.scope.ipv4_local_scope = 1; 3818 stcb->asoc.scope.site_scope = 1; 3819 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3820 /* 3821 * If the new destination is 3822 * SITE_LOCAL then we must have site 3823 * scope in common. 3824 */ 3825 stcb->asoc.scope.site_scope = 1; 3826 } 3827 } else { 3828 /* Validate the address is in scope */ 3829 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3830 (stcb->asoc.scope.loopback_scope == 0)) { 3831 addr_inscope = 0; 3832 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3833 (stcb->asoc.scope.local_scope == 0)) { 3834 addr_inscope = 0; 3835 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3836 (stcb->asoc.scope.site_scope == 0)) { 3837 addr_inscope = 0; 3838 } 3839 } 3840 break; 3841 } 3842 #endif 3843 default: 3844 /* not supported family type */ 3845 return (-1); 3846 } 3847 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3848 if (net == NULL) { 3849 return (-1); 3850 } 3851 SCTP_INCR_RADDR_COUNT(); 3852 memset(net, 0, sizeof(struct sctp_nets)); 3853 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3854 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3855 switch (newaddr->sa_family) { 3856 #ifdef INET 3857 case AF_INET: 3858 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3859 break; 3860 #endif 3861 #ifdef INET6 3862 case AF_INET6: 3863 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3864 break; 3865 #endif 3866 default: 3867 break; 3868 } 3869 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3870 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3871 stcb->asoc.scope.loopback_scope = 1; 3872 stcb->asoc.scope.ipv4_local_scope = 1; 3873 stcb->asoc.scope.local_scope = 0; 3874 stcb->asoc.scope.site_scope = 1; 3875 addr_inscope = 1; 3876 } 3877 net->failure_threshold = stcb->asoc.def_net_failure; 3878 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3879 if (addr_inscope == 0) { 3880 net->dest_state = (SCTP_ADDR_REACHABLE | 3881 SCTP_ADDR_OUT_OF_SCOPE); 3882 } else { 3883 if (from == SCTP_ADDR_IS_CONFIRMED) 3884 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3885 net->dest_state = SCTP_ADDR_REACHABLE; 3886 else 3887 net->dest_state = SCTP_ADDR_REACHABLE | 3888 SCTP_ADDR_UNCONFIRMED; 3889 } 3890 /* 3891 * We set this to 0, the timer code knows that this means its an 3892 * initial value 3893 */ 3894 net->rto_needed = 1; 3895 net->RTO = 0; 3896 net->RTO_measured = 0; 3897 stcb->asoc.numnets++; 3898 net->ref_count = 1; 3899 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3900 net->port = port; 3901 net->dscp = stcb->asoc.default_dscp; 3902 #ifdef INET6 3903 net->flowlabel = stcb->asoc.default_flowlabel; 3904 #endif 3905 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3906 net->dest_state |= SCTP_ADDR_NOHB; 3907 } else { 3908 net->dest_state &= ~SCTP_ADDR_NOHB; 3909 } 3910 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3911 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3912 } else { 3913 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3914 } 3915 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3916 /* Init the timer structure */ 3917 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3918 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3919 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3920 3921 /* Now generate a route for this guy */ 3922 #ifdef INET6 3923 /* KAME hack: embed scopeid */ 3924 if (newaddr->sa_family == AF_INET6) { 3925 struct sockaddr_in6 *sin6; 3926 3927 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3928 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3929 sin6->sin6_scope_id = 0; 3930 } 3931 #endif 3932 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3933 stcb->asoc.vrf_id, 3934 stcb->sctp_ep->fibnum); 3935 3936 net->src_addr_selected = 0; 3937 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3938 /* Get source address */ 3939 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3940 stcb, 3941 (sctp_route_t *)&net->ro, 3942 net, 3943 0, 3944 stcb->asoc.vrf_id); 3945 if (stcb->asoc.default_mtu > 0) { 3946 net->mtu = stcb->asoc.default_mtu; 3947 switch (net->ro._l_addr.sa.sa_family) { 3948 #ifdef INET 3949 case AF_INET: 3950 net->mtu += SCTP_MIN_V4_OVERHEAD; 3951 break; 3952 #endif 3953 #ifdef INET6 3954 case AF_INET6: 3955 net->mtu += SCTP_MIN_OVERHEAD; 3956 break; 3957 #endif 3958 default: 3959 break; 3960 } 3961 #if defined(INET) || defined(INET6) 3962 if (net->port) { 3963 net->mtu += (uint32_t)sizeof(struct udphdr); 3964 } 3965 #endif 3966 } else if (net->ro._s_addr != NULL) { 3967 uint32_t imtu, rmtu, hcmtu; 3968 3969 net->src_addr_selected = 1; 3970 /* Now get the interface MTU */ 3971 if (net->ro._s_addr->ifn_p != NULL) { 3972 /* 3973 * XXX: Should we here just use 3974 * net->ro._s_addr->ifn_p->ifn_mtu 3975 */ 3976 imtu = SCTP_GATHER_MTU_FROM_IFN_INFO(net->ro._s_addr->ifn_p->ifn_p, 3977 net->ro._s_addr->ifn_p->ifn_index); 3978 } else { 3979 imtu = 0; 3980 } 3981 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 3982 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3983 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3984 } 3985 } 3986 if (net->mtu == 0) { 3987 if (stcb->asoc.default_mtu > 0) { 3988 net->mtu = stcb->asoc.default_mtu; 3989 switch (net->ro._l_addr.sa.sa_family) { 3990 #ifdef INET 3991 case AF_INET: 3992 net->mtu += SCTP_MIN_V4_OVERHEAD; 3993 break; 3994 #endif 3995 #ifdef INET6 3996 case AF_INET6: 3997 net->mtu += SCTP_MIN_OVERHEAD; 3998 break; 3999 #endif 4000 default: 4001 break; 4002 } 4003 #if defined(INET) || defined(INET6) 4004 if (net->port) { 4005 net->mtu += (uint32_t)sizeof(struct udphdr); 4006 } 4007 #endif 4008 } else { 4009 switch (newaddr->sa_family) { 4010 #ifdef INET 4011 case AF_INET: 4012 net->mtu = SCTP_DEFAULT_MTU; 4013 break; 4014 #endif 4015 #ifdef INET6 4016 case AF_INET6: 4017 net->mtu = 1280; 4018 break; 4019 #endif 4020 default: 4021 break; 4022 } 4023 } 4024 } 4025 #if defined(INET) || defined(INET6) 4026 if (net->port) { 4027 net->mtu -= (uint32_t)sizeof(struct udphdr); 4028 } 4029 #endif 4030 if (from == SCTP_ALLOC_ASOC) { 4031 stcb->asoc.smallest_mtu = net->mtu; 4032 } 4033 if (stcb->asoc.smallest_mtu > net->mtu) { 4034 sctp_pathmtu_adjustment(stcb, net->mtu, true); 4035 } 4036 #ifdef INET6 4037 if (newaddr->sa_family == AF_INET6) { 4038 struct sockaddr_in6 *sin6; 4039 4040 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4041 (void)sa6_recoverscope(sin6); 4042 } 4043 #endif 4044 4045 /* JRS - Use the congestion control given in the CC module */ 4046 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4047 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4048 4049 /* 4050 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4051 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4052 */ 4053 net->find_pseudo_cumack = 1; 4054 net->find_rtx_pseudo_cumack = 1; 4055 /* Choose an initial flowid. */ 4056 net->flowid = stcb->asoc.my_vtag ^ 4057 ntohs(stcb->rport) ^ 4058 ntohs(stcb->sctp_ep->sctp_lport); 4059 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4060 if (netp) { 4061 *netp = net; 4062 } 4063 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4064 if (net->ro.ro_nh == NULL) { 4065 /* Since we have no route put it at the back */ 4066 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4067 } else if (netfirst == NULL) { 4068 /* We are the first one in the pool. */ 4069 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4070 } else if (netfirst->ro.ro_nh == NULL) { 4071 /* 4072 * First one has NO route. Place this one ahead of the first 4073 * one. 4074 */ 4075 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4076 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4077 /* 4078 * This one has a different interface than the one at the 4079 * top of the list. Place it ahead. 4080 */ 4081 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4082 } else { 4083 /* 4084 * Ok we have the same interface as the first one. Move 4085 * forward until we find either a) one with a NULL route... 4086 * insert ahead of that b) one with a different ifp.. insert 4087 * after that. c) end of the list.. insert at the tail. 4088 */ 4089 struct sctp_nets *netlook; 4090 4091 do { 4092 netlook = TAILQ_NEXT(netfirst, sctp_next); 4093 if (netlook == NULL) { 4094 /* End of the list */ 4095 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4096 break; 4097 } else if (netlook->ro.ro_nh == NULL) { 4098 /* next one has NO route */ 4099 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4100 break; 4101 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4102 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4103 net, sctp_next); 4104 break; 4105 } 4106 /* Shift forward */ 4107 netfirst = netlook; 4108 } while (netlook != NULL); 4109 } 4110 4111 /* got to have a primary set */ 4112 if (stcb->asoc.primary_destination == 0) { 4113 stcb->asoc.primary_destination = net; 4114 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4115 (net->ro.ro_nh) && 4116 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4117 /* No route to current primary adopt new primary */ 4118 stcb->asoc.primary_destination = net; 4119 } 4120 /* Validate primary is first */ 4121 net = TAILQ_FIRST(&stcb->asoc.nets); 4122 if ((net != stcb->asoc.primary_destination) && 4123 (stcb->asoc.primary_destination)) { 4124 /* 4125 * first one on the list is NOT the primary sctp_cmpaddr() 4126 * is much more efficient if the primary is the first on the 4127 * list, make it so. 4128 */ 4129 TAILQ_REMOVE(&stcb->asoc.nets, 4130 stcb->asoc.primary_destination, sctp_next); 4131 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4132 stcb->asoc.primary_destination, sctp_next); 4133 } 4134 return (0); 4135 } 4136 4137 static uint32_t 4138 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4139 { 4140 uint32_t id; 4141 struct sctpasochead *head; 4142 struct sctp_tcb *lstcb; 4143 4144 try_again: 4145 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4146 /* TSNH */ 4147 return (0); 4148 } 4149 /* 4150 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4151 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4152 */ 4153 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4154 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4155 } 4156 id = inp->sctp_associd_counter; 4157 inp->sctp_associd_counter++; 4158 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4159 if (lstcb) { 4160 goto try_again; 4161 } 4162 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4163 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4164 stcb->asoc.in_asocid_hash = 1; 4165 return (id); 4166 } 4167 4168 /* 4169 * allocate an association and add it to the endpoint. The caller must be 4170 * careful to add all additional addresses once they are know right away or 4171 * else the assoc will be may experience a blackout scenario. 4172 */ 4173 static struct sctp_tcb * 4174 sctp_aloc_assoc_locked(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4175 int *error, uint32_t override_tag, uint32_t initial_tsn, 4176 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4177 struct thread *p, 4178 int initialize_auth_params) 4179 { 4180 /* note the p argument is only valid in unbound sockets */ 4181 4182 struct sctp_tcb *stcb; 4183 struct sctp_association *asoc; 4184 struct sctpasochead *head; 4185 uint16_t rport; 4186 int err; 4187 4188 SCTP_INP_INFO_WLOCK_ASSERT(); 4189 SCTP_INP_WLOCK_ASSERT(inp); 4190 4191 /* 4192 * Assumption made here: Caller has done a 4193 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4194 * address does not exist already. 4195 */ 4196 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4197 /* Hit max assoc, sorry no more */ 4198 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4199 *error = ENOBUFS; 4200 return (NULL); 4201 } 4202 if (firstaddr == NULL) { 4203 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4204 *error = EINVAL; 4205 return (NULL); 4206 } 4207 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4208 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4209 *error = EINVAL; 4210 return (NULL); 4211 } 4212 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4213 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4214 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4215 /* 4216 * If its in the TCP pool, its NOT allowed to create an 4217 * association. The parent listener needs to call 4218 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4219 * off, or connected one does this.. its an error. 4220 */ 4221 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4222 *error = EINVAL; 4223 return (NULL); 4224 } 4225 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4226 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4227 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4228 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4229 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4230 *error = EINVAL; 4231 return (NULL); 4232 } 4233 } 4234 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4235 #ifdef SCTP_DEBUG 4236 if (firstaddr) { 4237 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4238 switch (firstaddr->sa_family) { 4239 #ifdef INET 4240 case AF_INET: 4241 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4242 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4243 break; 4244 #endif 4245 #ifdef INET6 4246 case AF_INET6: 4247 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4248 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4249 break; 4250 #endif 4251 default: 4252 break; 4253 } 4254 } else { 4255 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4256 } 4257 #endif /* SCTP_DEBUG */ 4258 switch (firstaddr->sa_family) { 4259 #ifdef INET 4260 case AF_INET: 4261 { 4262 struct sockaddr_in *sin; 4263 4264 sin = (struct sockaddr_in *)firstaddr; 4265 if ((ntohs(sin->sin_port) == 0) || 4266 (sin->sin_addr.s_addr == INADDR_ANY) || 4267 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4268 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) || 4269 (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) != 0) && 4270 (SCTP_IPV6_V6ONLY(inp) != 0))) { 4271 /* Invalid address */ 4272 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4273 *error = EINVAL; 4274 return (NULL); 4275 } 4276 rport = sin->sin_port; 4277 break; 4278 } 4279 #endif 4280 #ifdef INET6 4281 case AF_INET6: 4282 { 4283 struct sockaddr_in6 *sin6; 4284 4285 sin6 = (struct sockaddr_in6 *)firstaddr; 4286 if ((ntohs(sin6->sin6_port) == 0) || 4287 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4288 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) || 4289 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) { 4290 /* Invalid address */ 4291 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4292 *error = EINVAL; 4293 return (NULL); 4294 } 4295 rport = sin6->sin6_port; 4296 break; 4297 } 4298 #endif 4299 default: 4300 /* not supported family type */ 4301 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4302 *error = EINVAL; 4303 return (NULL); 4304 } 4305 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4306 /* 4307 * If you have not performed a bind, then we need to do the 4308 * ephemeral bind for you. 4309 */ 4310 if ((err = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) { 4311 /* bind error, probably perm */ 4312 *error = err; 4313 return (NULL); 4314 } 4315 } 4316 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4317 if (stcb == NULL) { 4318 /* out of memory? */ 4319 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4320 *error = ENOMEM; 4321 return (NULL); 4322 } 4323 SCTP_INCR_ASOC_COUNT(); 4324 4325 memset(stcb, 0, sizeof(*stcb)); 4326 asoc = &stcb->asoc; 4327 4328 SCTP_TCB_LOCK_INIT(stcb); 4329 SCTP_TCB_SEND_LOCK_INIT(stcb); 4330 stcb->rport = rport; 4331 /* setup back pointer's */ 4332 stcb->sctp_ep = inp; 4333 stcb->sctp_socket = inp->sctp_socket; 4334 if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) { 4335 /* failed */ 4336 SCTP_TCB_LOCK_DESTROY(stcb); 4337 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4338 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4339 SCTP_DECR_ASOC_COUNT(); 4340 *error = err; 4341 return (NULL); 4342 } 4343 SCTP_TCB_LOCK(stcb); 4344 4345 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4346 /* now that my_vtag is set, add it to the hash */ 4347 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4348 /* put it in the bucket in the vtag hash of assoc's for the system */ 4349 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4350 4351 if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) { 4352 /* failure.. memory error? */ 4353 if (asoc->strmout) { 4354 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4355 asoc->strmout = NULL; 4356 } 4357 if (asoc->mapping_array) { 4358 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4359 asoc->mapping_array = NULL; 4360 } 4361 if (asoc->nr_mapping_array) { 4362 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4363 asoc->nr_mapping_array = NULL; 4364 } 4365 SCTP_DECR_ASOC_COUNT(); 4366 SCTP_TCB_UNLOCK(stcb); 4367 SCTP_TCB_LOCK_DESTROY(stcb); 4368 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4369 LIST_REMOVE(stcb, sctp_asocs); 4370 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4371 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4372 SCTP_INP_WUNLOCK(inp); 4373 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4374 *error = ENOBUFS; 4375 return (NULL); 4376 } 4377 /* Init all the timers */ 4378 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4379 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4380 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4381 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4382 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4383 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4384 4385 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4386 /* now file the port under the hash as well */ 4387 if (inp->sctp_tcbhash != NULL) { 4388 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4389 inp->sctp_hashmark)]; 4390 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4391 } 4392 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4393 sctp_initialize_auth_params(inp, stcb); 4394 } 4395 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4396 return (stcb); 4397 } 4398 4399 struct sctp_tcb * 4400 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4401 int *error, uint32_t override_tag, uint32_t initial_tsn, 4402 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4403 struct thread *p, 4404 int initialize_auth_params) 4405 { 4406 struct sctp_tcb *stcb; 4407 4408 SCTP_INP_INFO_WLOCK(); 4409 SCTP_INP_WLOCK(inp); 4410 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4411 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4412 SCTP_INP_INFO_WUNLOCK(); 4413 SCTP_INP_WUNLOCK(inp); 4414 return (stcb); 4415 } 4416 4417 struct sctp_tcb * 4418 sctp_aloc_assoc_connected(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4419 int *error, uint32_t override_tag, uint32_t initial_tsn, 4420 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4421 struct thread *p, 4422 int initialize_auth_params) 4423 { 4424 struct sctp_tcb *stcb; 4425 4426 SCTP_INP_INFO_WLOCK(); 4427 SCTP_INP_WLOCK(inp); 4428 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 4429 SCTP_IS_LISTENING(inp)) { 4430 SCTP_INP_INFO_WUNLOCK(); 4431 SCTP_INP_WUNLOCK(inp); 4432 *error = EINVAL; 4433 return (NULL); 4434 } 4435 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4436 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4437 SCTP_INP_INFO_WUNLOCK(); 4438 if (stcb != NULL && (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4439 inp->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 4440 soisconnecting(inp->sctp_socket); 4441 } 4442 SCTP_INP_WUNLOCK(inp); 4443 return (stcb); 4444 } 4445 4446 void 4447 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4448 { 4449 struct sctp_inpcb *inp; 4450 struct sctp_association *asoc; 4451 4452 inp = stcb->sctp_ep; 4453 asoc = &stcb->asoc; 4454 asoc->numnets--; 4455 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4456 if (net == asoc->primary_destination) { 4457 /* Reset primary */ 4458 struct sctp_nets *lnet; 4459 4460 lnet = TAILQ_FIRST(&asoc->nets); 4461 /* 4462 * Mobility adaptation Ideally, if deleted destination is 4463 * the primary, it becomes a fast retransmission trigger by 4464 * the subsequent SET PRIMARY. (by micchie) 4465 */ 4466 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4467 SCTP_MOBILITY_BASE) || 4468 sctp_is_mobility_feature_on(stcb->sctp_ep, 4469 SCTP_MOBILITY_FASTHANDOFF)) { 4470 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4471 if (asoc->deleted_primary != NULL) { 4472 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4473 goto out; 4474 } 4475 asoc->deleted_primary = net; 4476 atomic_add_int(&net->ref_count, 1); 4477 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4478 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4479 sctp_mobility_feature_on(stcb->sctp_ep, 4480 SCTP_MOBILITY_PRIM_DELETED); 4481 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4482 stcb->sctp_ep, stcb, NULL); 4483 } 4484 out: 4485 /* Try to find a confirmed primary */ 4486 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4487 } 4488 if (net == asoc->last_data_chunk_from) { 4489 /* Reset primary */ 4490 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4491 } 4492 if (net == asoc->last_control_chunk_from) { 4493 /* Clear net */ 4494 asoc->last_control_chunk_from = NULL; 4495 } 4496 if (net == asoc->last_net_cmt_send_started) { 4497 /* Clear net */ 4498 asoc->last_net_cmt_send_started = NULL; 4499 } 4500 if (net == stcb->asoc.alternate) { 4501 sctp_free_remote_addr(stcb->asoc.alternate); 4502 stcb->asoc.alternate = NULL; 4503 } 4504 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4505 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4506 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4507 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4508 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4509 sctp_free_remote_addr(net); 4510 } 4511 4512 /* 4513 * remove a remote endpoint address from an association, it will fail if the 4514 * address does not exist. 4515 */ 4516 int 4517 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4518 { 4519 /* 4520 * Here we need to remove a remote address. This is quite simple, we 4521 * first find it in the list of address for the association 4522 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4523 * on that item. Note we do not allow it to be removed if there are 4524 * no other addresses. 4525 */ 4526 struct sctp_association *asoc; 4527 struct sctp_nets *net, *nnet; 4528 4529 asoc = &stcb->asoc; 4530 4531 /* locate the address */ 4532 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4533 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4534 continue; 4535 } 4536 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4537 remaddr)) { 4538 /* we found the guy */ 4539 if (asoc->numnets < 2) { 4540 /* Must have at LEAST two remote addresses */ 4541 return (-1); 4542 } else { 4543 sctp_remove_net(stcb, net); 4544 return (0); 4545 } 4546 } 4547 } 4548 /* not found. */ 4549 return (-2); 4550 } 4551 4552 static bool 4553 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport, uint32_t now) 4554 { 4555 struct sctpvtaghead *chain; 4556 struct sctp_tagblock *twait_block; 4557 int i; 4558 4559 SCTP_INP_INFO_LOCK_ASSERT(); 4560 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4561 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4562 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4563 if ((twait_block->vtag_block[i].tv_sec_at_expire >= now) && 4564 (twait_block->vtag_block[i].v_tag == tag) && 4565 (twait_block->vtag_block[i].lport == lport) && 4566 (twait_block->vtag_block[i].rport == rport)) { 4567 return (true); 4568 } 4569 } 4570 } 4571 return (false); 4572 } 4573 4574 static void 4575 sctp_set_vtag_block(struct sctp_timewait *vtag_block, uint32_t time, 4576 uint32_t tag, uint16_t lport, uint16_t rport) 4577 { 4578 vtag_block->tv_sec_at_expire = time; 4579 vtag_block->v_tag = tag; 4580 vtag_block->lport = lport; 4581 vtag_block->rport = rport; 4582 } 4583 4584 static void 4585 sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4586 { 4587 struct sctpvtaghead *chain; 4588 struct sctp_tagblock *twait_block; 4589 struct timeval now; 4590 uint32_t time; 4591 int i; 4592 bool set; 4593 4594 SCTP_INP_INFO_WLOCK_ASSERT(); 4595 (void)SCTP_GETTIME_TIMEVAL(&now); 4596 time = (uint32_t)now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait); 4597 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4598 set = false; 4599 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4600 /* Block(s) present, lets find space, and expire on the fly */ 4601 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4602 if ((twait_block->vtag_block[i].v_tag == 0) && !set) { 4603 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4604 set = true; 4605 continue; 4606 } 4607 if ((twait_block->vtag_block[i].v_tag != 0) && 4608 (twait_block->vtag_block[i].tv_sec_at_expire < (uint32_t)now.tv_sec)) { 4609 if (set) { 4610 /* Audit expires this guy */ 4611 sctp_set_vtag_block(twait_block->vtag_block + i, 0, 0, 0, 0); 4612 } else { 4613 /* Reuse it for the new tag */ 4614 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4615 set = true; 4616 } 4617 } 4618 } 4619 if (set) { 4620 /* 4621 * We only do up to the block where we can place our 4622 * tag for audits 4623 */ 4624 break; 4625 } 4626 } 4627 /* Need to add a new block to chain */ 4628 if (!set) { 4629 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4630 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4631 if (twait_block == NULL) { 4632 return; 4633 } 4634 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4635 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4636 sctp_set_vtag_block(twait_block->vtag_block, time, tag, lport, rport); 4637 } 4638 } 4639 4640 void 4641 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4642 { 4643 struct sctp_tmit_chunk *chk, *nchk; 4644 struct sctp_queued_to_read *control, *ncontrol; 4645 4646 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4647 TAILQ_REMOVE(rh, control, next_instrm); 4648 control->on_strm_q = 0; 4649 if (control->on_read_q == 0) { 4650 sctp_free_remote_addr(control->whoFrom); 4651 if (control->data) { 4652 sctp_m_freem(control->data); 4653 control->data = NULL; 4654 } 4655 } 4656 /* Reassembly free? */ 4657 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4658 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4659 if (chk->data) { 4660 sctp_m_freem(chk->data); 4661 chk->data = NULL; 4662 } 4663 if (chk->holds_key_ref) 4664 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4665 sctp_free_remote_addr(chk->whoTo); 4666 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4667 SCTP_DECR_CHK_COUNT(); 4668 /* sa_ignore FREED_MEMORY */ 4669 } 4670 /* 4671 * We don't free the address here since all the net's were 4672 * freed above. 4673 */ 4674 if (control->on_read_q == 0) { 4675 sctp_free_a_readq(stcb, control); 4676 } 4677 } 4678 } 4679 4680 /*- 4681 * Free the association after un-hashing the remote port. This 4682 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4683 * expect that the input to this function IS a locked TCB. 4684 * It will return 0, if it did NOT destroy the association (instead 4685 * it unlocks it. It will return NON-zero if it either destroyed the 4686 * association OR the association is already destroyed. 4687 */ 4688 int 4689 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4690 { 4691 int i; 4692 struct sctp_association *asoc; 4693 struct sctp_nets *net, *nnet; 4694 struct sctp_laddr *laddr, *naddr; 4695 struct sctp_tmit_chunk *chk, *nchk; 4696 struct sctp_asconf_addr *aparam, *naparam; 4697 struct sctp_asconf_ack *aack, *naack; 4698 struct sctp_stream_reset_list *strrst, *nstrrst; 4699 struct sctp_queued_to_read *sq, *nsq; 4700 struct sctp_stream_queue_pending *sp, *nsp; 4701 sctp_sharedkey_t *shared_key, *nshared_key; 4702 struct socket *so; 4703 4704 /* first, lets purge the entry from the hash table. */ 4705 4706 #ifdef SCTP_LOG_CLOSING 4707 sctp_log_closing(inp, stcb, 6); 4708 #endif 4709 if (stcb->asoc.state == 0) { 4710 #ifdef SCTP_LOG_CLOSING 4711 sctp_log_closing(inp, NULL, 7); 4712 #endif 4713 /* there is no asoc, really TSNH :-0 */ 4714 return (1); 4715 } 4716 SCTP_TCB_SEND_LOCK(stcb); 4717 if (stcb->asoc.alternate) { 4718 sctp_free_remote_addr(stcb->asoc.alternate); 4719 stcb->asoc.alternate = NULL; 4720 } 4721 /* TEMP CODE */ 4722 if (stcb->freed_from_where == 0) { 4723 /* Only record the first place free happened from */ 4724 stcb->freed_from_where = from_location; 4725 } 4726 /* TEMP CODE */ 4727 4728 asoc = &stcb->asoc; 4729 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4730 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4731 /* nothing around */ 4732 so = NULL; 4733 else 4734 so = inp->sctp_socket; 4735 4736 /* 4737 * We used timer based freeing if a reader or writer is in the way. 4738 * So we first check if we are actually being called from a timer, 4739 * if so we abort early if a reader or writer is still in the way. 4740 */ 4741 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4742 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4743 /* 4744 * is it the timer driving us? if so are the reader/writers 4745 * gone? 4746 */ 4747 if (stcb->asoc.refcnt) { 4748 /* nope, reader or writer in the way */ 4749 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4750 /* no asoc destroyed */ 4751 SCTP_TCB_SEND_UNLOCK(stcb); 4752 SCTP_TCB_UNLOCK(stcb); 4753 #ifdef SCTP_LOG_CLOSING 4754 sctp_log_closing(inp, stcb, 8); 4755 #endif 4756 return (0); 4757 } 4758 } 4759 /* Now clean up any other timers */ 4760 sctp_stop_association_timers(stcb, false); 4761 /* Now the read queue needs to be cleaned up (only once) */ 4762 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4763 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4764 SCTP_INP_READ_LOCK(inp); 4765 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4766 if (sq->stcb == stcb) { 4767 sq->do_not_ref_stcb = 1; 4768 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4769 /* 4770 * If there is no end, there never will be 4771 * now. 4772 */ 4773 if (sq->end_added == 0) { 4774 /* Held for PD-API clear that. */ 4775 sq->pdapi_aborted = 1; 4776 sq->held_length = 0; 4777 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4778 /* 4779 * Need to add a PD-API 4780 * aborted indication. 4781 * Setting the control_pdapi 4782 * assures that it will be 4783 * added right after this 4784 * msg. 4785 */ 4786 uint32_t strseq; 4787 4788 stcb->asoc.control_pdapi = sq; 4789 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4790 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4791 stcb, 4792 SCTP_PARTIAL_DELIVERY_ABORTED, 4793 (void *)&strseq, 4794 SCTP_SO_LOCKED); 4795 stcb->asoc.control_pdapi = NULL; 4796 } 4797 } 4798 /* Add an end to wake them */ 4799 sq->end_added = 1; 4800 } 4801 } 4802 SCTP_INP_READ_UNLOCK(inp); 4803 if (stcb->block_entry) { 4804 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4805 stcb->block_entry->error = ECONNRESET; 4806 stcb->block_entry = NULL; 4807 } 4808 } 4809 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4810 /* 4811 * Someone holds a reference OR the socket is unaccepted 4812 * yet. 4813 */ 4814 if ((stcb->asoc.refcnt) || 4815 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4816 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4817 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4818 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4819 } 4820 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4821 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4822 /* nothing around */ 4823 so = NULL; 4824 if (so) { 4825 /* Wake any reader/writers */ 4826 sctp_sorwakeup(inp, so); 4827 sctp_sowwakeup(inp, so); 4828 } 4829 SCTP_TCB_SEND_UNLOCK(stcb); 4830 SCTP_TCB_UNLOCK(stcb); 4831 4832 #ifdef SCTP_LOG_CLOSING 4833 sctp_log_closing(inp, stcb, 9); 4834 #endif 4835 /* no asoc destroyed */ 4836 return (0); 4837 } 4838 #ifdef SCTP_LOG_CLOSING 4839 sctp_log_closing(inp, stcb, 10); 4840 #endif 4841 /* 4842 * When I reach here, no others want to kill the assoc yet.. and I 4843 * own the lock. Now its possible an abort comes in when I do the 4844 * lock exchange below to grab all the locks to do the final take 4845 * out. to prevent this we increment the count, which will start a 4846 * timer and blow out above thus assuring us that we hold exclusive 4847 * killing of the asoc. Note that after getting back the TCB lock we 4848 * will go ahead and increment the counter back up and stop any 4849 * timer a passing stranger may have started :-S 4850 */ 4851 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4852 atomic_add_int(&stcb->asoc.refcnt, 1); 4853 4854 SCTP_TCB_SEND_UNLOCK(stcb); 4855 SCTP_TCB_UNLOCK(stcb); 4856 SCTP_INP_INFO_WLOCK(); 4857 SCTP_INP_WLOCK(inp); 4858 SCTP_TCB_LOCK(stcb); 4859 SCTP_TCB_SEND_LOCK(stcb); 4860 } 4861 /* Double check the GONE flag */ 4862 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4863 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4864 /* nothing around */ 4865 so = NULL; 4866 4867 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4868 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4869 /* 4870 * For TCP type we need special handling when we are 4871 * connected. We also include the peel'ed off ones to. 4872 */ 4873 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4874 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4875 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4876 if (so) { 4877 SOCKBUF_LOCK(&so->so_rcv); 4878 so->so_state &= ~(SS_ISCONNECTING | 4879 SS_ISDISCONNECTING | 4880 SS_ISCONFIRMING | 4881 SS_ISCONNECTED); 4882 so->so_state |= SS_ISDISCONNECTED; 4883 socantrcvmore_locked(so); 4884 socantsendmore(so); 4885 sctp_sowwakeup(inp, so); 4886 sctp_sorwakeup(inp, so); 4887 SCTP_SOWAKEUP(so); 4888 } 4889 } 4890 } 4891 4892 /* 4893 * Make it invalid too, that way if its about to run it will abort 4894 * and return. 4895 */ 4896 /* re-increment the lock */ 4897 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4898 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4899 } 4900 if (stcb->asoc.refcnt) { 4901 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4902 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4903 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4904 SCTP_INP_INFO_WUNLOCK(); 4905 SCTP_INP_WUNLOCK(inp); 4906 } 4907 SCTP_TCB_SEND_UNLOCK(stcb); 4908 SCTP_TCB_UNLOCK(stcb); 4909 return (0); 4910 } 4911 asoc->state = 0; 4912 if (inp->sctp_tcbhash) { 4913 LIST_REMOVE(stcb, sctp_tcbhash); 4914 } 4915 if (stcb->asoc.in_asocid_hash) { 4916 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4917 } 4918 if (inp->sctp_socket == NULL) { 4919 stcb->sctp_socket = NULL; 4920 } 4921 /* Now lets remove it from the list of ALL associations in the EP */ 4922 LIST_REMOVE(stcb, sctp_tcblist); 4923 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4924 SCTP_INP_INCR_REF(inp); 4925 SCTP_INP_WUNLOCK(inp); 4926 } 4927 /* pull from vtag hash */ 4928 LIST_REMOVE(stcb, sctp_asocs); 4929 sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport); 4930 4931 /* 4932 * Now restop the timers to be sure this is paranoia at is finest! 4933 */ 4934 sctp_stop_association_timers(stcb, true); 4935 4936 /* 4937 * The chunk lists and such SHOULD be empty but we check them just 4938 * in case. 4939 */ 4940 /* anything on the wheel needs to be removed */ 4941 for (i = 0; i < asoc->streamoutcnt; i++) { 4942 struct sctp_stream_out *outs; 4943 4944 outs = &asoc->strmout[i]; 4945 /* now clean up any chunks here */ 4946 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4947 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4948 TAILQ_REMOVE(&outs->outqueue, sp, next); 4949 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp); 4950 sctp_free_spbufspace(stcb, asoc, sp); 4951 if (sp->data) { 4952 if (so) { 4953 /* Still an open socket - report */ 4954 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4955 0, (void *)sp, SCTP_SO_LOCKED); 4956 } 4957 if (sp->data) { 4958 sctp_m_freem(sp->data); 4959 sp->data = NULL; 4960 sp->tail_mbuf = NULL; 4961 sp->length = 0; 4962 } 4963 } 4964 if (sp->net) { 4965 sctp_free_remote_addr(sp->net); 4966 sp->net = NULL; 4967 } 4968 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4969 } 4970 } 4971 /* sa_ignore FREED_MEMORY */ 4972 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4973 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4974 SCTP_FREE(strrst, SCTP_M_STRESET); 4975 } 4976 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4977 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4978 if (sq->data) { 4979 sctp_m_freem(sq->data); 4980 sq->data = NULL; 4981 } 4982 sctp_free_remote_addr(sq->whoFrom); 4983 sq->whoFrom = NULL; 4984 sq->stcb = NULL; 4985 /* Free the ctl entry */ 4986 sctp_free_a_readq(stcb, sq); 4987 /* sa_ignore FREED_MEMORY */ 4988 } 4989 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4990 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4991 if (chk->data) { 4992 sctp_m_freem(chk->data); 4993 chk->data = NULL; 4994 } 4995 if (chk->holds_key_ref) 4996 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4997 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4998 SCTP_DECR_CHK_COUNT(); 4999 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5000 asoc->free_chunk_cnt--; 5001 /* sa_ignore FREED_MEMORY */ 5002 } 5003 /* pending send queue SHOULD be empty */ 5004 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5005 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5006 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5007 #ifdef INVARIANTS 5008 } else { 5009 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5010 #endif 5011 } 5012 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5013 if (chk->data) { 5014 if (so) { 5015 /* Still a socket? */ 5016 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5017 0, chk, SCTP_SO_LOCKED); 5018 } 5019 if (chk->data) { 5020 sctp_m_freem(chk->data); 5021 chk->data = NULL; 5022 } 5023 } 5024 if (chk->holds_key_ref) 5025 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5026 if (chk->whoTo) { 5027 sctp_free_remote_addr(chk->whoTo); 5028 chk->whoTo = NULL; 5029 } 5030 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5031 SCTP_DECR_CHK_COUNT(); 5032 /* sa_ignore FREED_MEMORY */ 5033 } 5034 /* sent queue SHOULD be empty */ 5035 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5036 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5037 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5038 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5039 #ifdef INVARIANTS 5040 } else { 5041 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5042 #endif 5043 } 5044 } 5045 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5046 if (chk->data) { 5047 if (so) { 5048 /* Still a socket? */ 5049 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5050 0, chk, SCTP_SO_LOCKED); 5051 } 5052 if (chk->data) { 5053 sctp_m_freem(chk->data); 5054 chk->data = NULL; 5055 } 5056 } 5057 if (chk->holds_key_ref) 5058 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5059 sctp_free_remote_addr(chk->whoTo); 5060 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5061 SCTP_DECR_CHK_COUNT(); 5062 /* sa_ignore FREED_MEMORY */ 5063 } 5064 #ifdef INVARIANTS 5065 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5066 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5067 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5068 } 5069 } 5070 #endif 5071 /* control queue MAY not be empty */ 5072 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5073 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5074 if (chk->data) { 5075 sctp_m_freem(chk->data); 5076 chk->data = NULL; 5077 } 5078 if (chk->holds_key_ref) 5079 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5080 sctp_free_remote_addr(chk->whoTo); 5081 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5082 SCTP_DECR_CHK_COUNT(); 5083 /* sa_ignore FREED_MEMORY */ 5084 } 5085 /* ASCONF queue MAY not be empty */ 5086 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5087 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5088 if (chk->data) { 5089 sctp_m_freem(chk->data); 5090 chk->data = NULL; 5091 } 5092 if (chk->holds_key_ref) 5093 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5094 sctp_free_remote_addr(chk->whoTo); 5095 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5096 SCTP_DECR_CHK_COUNT(); 5097 /* sa_ignore FREED_MEMORY */ 5098 } 5099 if (asoc->mapping_array) { 5100 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5101 asoc->mapping_array = NULL; 5102 } 5103 if (asoc->nr_mapping_array) { 5104 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5105 asoc->nr_mapping_array = NULL; 5106 } 5107 /* the stream outs */ 5108 if (asoc->strmout) { 5109 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5110 asoc->strmout = NULL; 5111 } 5112 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5113 if (asoc->strmin) { 5114 for (i = 0; i < asoc->streamincnt; i++) { 5115 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5116 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5117 } 5118 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5119 asoc->strmin = NULL; 5120 } 5121 asoc->streamincnt = 0; 5122 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5123 #ifdef INVARIANTS 5124 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5125 panic("no net's left alloc'ed, or list points to itself"); 5126 } 5127 #endif 5128 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5129 sctp_free_remote_addr(net); 5130 } 5131 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5132 /* sa_ignore FREED_MEMORY */ 5133 sctp_remove_laddr(laddr); 5134 } 5135 5136 /* pending asconf (address) parameters */ 5137 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5138 /* sa_ignore FREED_MEMORY */ 5139 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5140 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5141 } 5142 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5143 /* sa_ignore FREED_MEMORY */ 5144 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5145 if (aack->data != NULL) { 5146 sctp_m_freem(aack->data); 5147 } 5148 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5149 } 5150 /* clean up auth stuff */ 5151 if (asoc->local_hmacs) 5152 sctp_free_hmaclist(asoc->local_hmacs); 5153 if (asoc->peer_hmacs) 5154 sctp_free_hmaclist(asoc->peer_hmacs); 5155 5156 if (asoc->local_auth_chunks) 5157 sctp_free_chunklist(asoc->local_auth_chunks); 5158 if (asoc->peer_auth_chunks) 5159 sctp_free_chunklist(asoc->peer_auth_chunks); 5160 5161 sctp_free_authinfo(&asoc->authinfo); 5162 5163 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5164 LIST_REMOVE(shared_key, next); 5165 sctp_free_sharedkey(shared_key); 5166 /* sa_ignore FREED_MEMORY */ 5167 } 5168 5169 /* Insert new items here :> */ 5170 5171 /* Get rid of LOCK */ 5172 SCTP_TCB_SEND_UNLOCK(stcb); 5173 SCTP_TCB_UNLOCK(stcb); 5174 SCTP_TCB_LOCK_DESTROY(stcb); 5175 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5176 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5177 SCTP_INP_INFO_WUNLOCK(); 5178 SCTP_INP_RLOCK(inp); 5179 } 5180 #ifdef SCTP_TRACK_FREED_ASOCS 5181 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5182 /* now clean up the tasoc itself */ 5183 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5184 SCTP_DECR_ASOC_COUNT(); 5185 } else { 5186 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5187 } 5188 #else 5189 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5190 SCTP_DECR_ASOC_COUNT(); 5191 #endif 5192 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5193 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5194 /* 5195 * If its NOT the inp_free calling us AND sctp_close 5196 * as been called, we call back... 5197 */ 5198 SCTP_INP_RUNLOCK(inp); 5199 /* 5200 * This will start the kill timer (if we are the 5201 * last one) since we hold an increment yet. But 5202 * this is the only safe way to do this since 5203 * otherwise if the socket closes at the same time 5204 * we are here we might collide in the cleanup. 5205 */ 5206 sctp_inpcb_free(inp, 5207 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5208 SCTP_CALLED_DIRECTLY_NOCMPSET); 5209 SCTP_INP_DECR_REF(inp); 5210 } else { 5211 /* The socket is still open. */ 5212 SCTP_INP_DECR_REF(inp); 5213 SCTP_INP_RUNLOCK(inp); 5214 } 5215 } 5216 /* destroyed the asoc */ 5217 #ifdef SCTP_LOG_CLOSING 5218 sctp_log_closing(inp, NULL, 11); 5219 #endif 5220 return (1); 5221 } 5222 5223 /* 5224 * determine if a destination is "reachable" based upon the addresses bound 5225 * to the current endpoint (e.g. only v4 or v6 currently bound) 5226 */ 5227 /* 5228 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5229 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5230 * types bound as its endpoint 5231 */ 5232 int 5233 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5234 { 5235 struct sctp_inpcb *inp; 5236 int answer; 5237 5238 /* 5239 * No locks here, the TCB, in all cases is already locked and an 5240 * assoc is up. There is either a INP lock by the caller applied (in 5241 * asconf case when deleting an address) or NOT in the HB case, 5242 * however if HB then the INP increment is up and the INP will not 5243 * be removed (on top of the fact that we have a TCB lock). So we 5244 * only want to read the sctp_flags, which is either bound-all or 5245 * not.. no protection needed since once an assoc is up you can't be 5246 * changing your binding. 5247 */ 5248 inp = stcb->sctp_ep; 5249 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5250 /* if bound all, destination is not restricted */ 5251 /* 5252 * RRS: Question during lock work: Is this correct? If you 5253 * are bound-all you still might need to obey the V4--V6 5254 * flags??? IMO this bound-all stuff needs to be removed! 5255 */ 5256 return (1); 5257 } 5258 /* NOTE: all "scope" checks are done when local addresses are added */ 5259 switch (destaddr->sa_family) { 5260 #ifdef INET6 5261 case AF_INET6: 5262 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5263 break; 5264 #endif 5265 #ifdef INET 5266 case AF_INET: 5267 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5268 break; 5269 #endif 5270 default: 5271 /* invalid family, so it's unreachable */ 5272 answer = 0; 5273 break; 5274 } 5275 return (answer); 5276 } 5277 5278 /* 5279 * update the inp_vflags on an endpoint 5280 */ 5281 static void 5282 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5283 { 5284 struct sctp_laddr *laddr; 5285 5286 /* first clear the flag */ 5287 inp->ip_inp.inp.inp_vflag = 0; 5288 /* set the flag based on addresses on the ep list */ 5289 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5290 if (laddr->ifa == NULL) { 5291 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5292 __func__); 5293 continue; 5294 } 5295 5296 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5297 continue; 5298 } 5299 switch (laddr->ifa->address.sa.sa_family) { 5300 #ifdef INET6 5301 case AF_INET6: 5302 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5303 break; 5304 #endif 5305 #ifdef INET 5306 case AF_INET: 5307 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5308 break; 5309 #endif 5310 default: 5311 break; 5312 } 5313 } 5314 } 5315 5316 /* 5317 * Add the address to the endpoint local address list There is nothing to be 5318 * done if we are bound to all addresses 5319 */ 5320 void 5321 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5322 { 5323 struct sctp_laddr *laddr; 5324 struct sctp_tcb *stcb; 5325 int fnd, error = 0; 5326 5327 fnd = 0; 5328 5329 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5330 /* You are already bound to all. You have it already */ 5331 return; 5332 } 5333 #ifdef INET6 5334 if (ifa->address.sa.sa_family == AF_INET6) { 5335 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5336 /* Can't bind a non-useable addr. */ 5337 return; 5338 } 5339 } 5340 #endif 5341 /* first, is it already present? */ 5342 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5343 if (laddr->ifa == ifa) { 5344 fnd = 1; 5345 break; 5346 } 5347 } 5348 5349 if (fnd == 0) { 5350 /* Not in the ep list */ 5351 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5352 if (error != 0) 5353 return; 5354 inp->laddr_count++; 5355 /* update inp_vflag flags */ 5356 switch (ifa->address.sa.sa_family) { 5357 #ifdef INET6 5358 case AF_INET6: 5359 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5360 break; 5361 #endif 5362 #ifdef INET 5363 case AF_INET: 5364 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5365 break; 5366 #endif 5367 default: 5368 break; 5369 } 5370 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5371 sctp_add_local_addr_restricted(stcb, ifa); 5372 } 5373 } 5374 return; 5375 } 5376 5377 /* 5378 * select a new (hopefully reachable) destination net (should only be used 5379 * when we deleted an ep addr that is the only usable source address to reach 5380 * the destination net) 5381 */ 5382 static void 5383 sctp_select_primary_destination(struct sctp_tcb *stcb) 5384 { 5385 struct sctp_nets *net; 5386 5387 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5388 /* for now, we'll just pick the first reachable one we find */ 5389 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5390 continue; 5391 if (sctp_destination_is_reachable(stcb, 5392 (struct sockaddr *)&net->ro._l_addr)) { 5393 /* found a reachable destination */ 5394 stcb->asoc.primary_destination = net; 5395 } 5396 } 5397 /* I can't there from here! ...we're gonna die shortly... */ 5398 } 5399 5400 /* 5401 * Delete the address from the endpoint local address list. There is nothing 5402 * to be done if we are bound to all addresses 5403 */ 5404 void 5405 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5406 { 5407 struct sctp_laddr *laddr; 5408 int fnd; 5409 5410 fnd = 0; 5411 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5412 /* You are already bound to all. You have it already */ 5413 return; 5414 } 5415 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5416 if (laddr->ifa == ifa) { 5417 fnd = 1; 5418 break; 5419 } 5420 } 5421 if (fnd && (inp->laddr_count < 2)) { 5422 /* can't delete unless there are at LEAST 2 addresses */ 5423 return; 5424 } 5425 if (fnd) { 5426 /* 5427 * clean up any use of this address go through our 5428 * associations and clear any last_used_address that match 5429 * this one for each assoc, see if a new primary_destination 5430 * is needed 5431 */ 5432 struct sctp_tcb *stcb; 5433 5434 /* clean up "next_addr_touse" */ 5435 if (inp->next_addr_touse == laddr) 5436 /* delete this address */ 5437 inp->next_addr_touse = NULL; 5438 5439 /* clean up "last_used_address" */ 5440 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5441 struct sctp_nets *net; 5442 5443 SCTP_TCB_LOCK(stcb); 5444 if (stcb->asoc.last_used_address == laddr) 5445 /* delete this address */ 5446 stcb->asoc.last_used_address = NULL; 5447 /* 5448 * Now spin through all the nets and purge any ref 5449 * to laddr 5450 */ 5451 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5452 if (net->ro._s_addr == laddr->ifa) { 5453 /* Yep, purge src address selected */ 5454 RO_NHFREE(&net->ro); 5455 sctp_free_ifa(net->ro._s_addr); 5456 net->ro._s_addr = NULL; 5457 net->src_addr_selected = 0; 5458 } 5459 } 5460 SCTP_TCB_UNLOCK(stcb); 5461 } /* for each tcb */ 5462 /* remove it from the ep list */ 5463 sctp_remove_laddr(laddr); 5464 inp->laddr_count--; 5465 /* update inp_vflag flags */ 5466 sctp_update_ep_vflag(inp); 5467 } 5468 return; 5469 } 5470 5471 /* 5472 * Add the address to the TCB local address restricted list. 5473 * This is a "pending" address list (eg. addresses waiting for an 5474 * ASCONF-ACK response) and cannot be used as a valid source address. 5475 */ 5476 void 5477 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5478 { 5479 struct sctp_laddr *laddr; 5480 struct sctpladdr *list; 5481 5482 /* 5483 * Assumes TCB is locked.. and possibly the INP. May need to 5484 * confirm/fix that if we need it and is not the case. 5485 */ 5486 list = &stcb->asoc.sctp_restricted_addrs; 5487 5488 #ifdef INET6 5489 if (ifa->address.sa.sa_family == AF_INET6) { 5490 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5491 /* Can't bind a non-existent addr. */ 5492 return; 5493 } 5494 } 5495 #endif 5496 /* does the address already exist? */ 5497 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5498 if (laddr->ifa == ifa) { 5499 return; 5500 } 5501 } 5502 5503 /* add to the list */ 5504 (void)sctp_insert_laddr(list, ifa, 0); 5505 return; 5506 } 5507 5508 /* 5509 * Remove a local address from the TCB local address restricted list 5510 */ 5511 void 5512 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5513 { 5514 struct sctp_inpcb *inp; 5515 struct sctp_laddr *laddr; 5516 5517 /* 5518 * This is called by asconf work. It is assumed that a) The TCB is 5519 * locked and b) The INP is locked. This is true in as much as I can 5520 * trace through the entry asconf code where I did these locks. 5521 * Again, the ASCONF code is a bit different in that it does lock 5522 * the INP during its work often times. This must be since we don't 5523 * want other proc's looking up things while what they are looking 5524 * up is changing :-D 5525 */ 5526 5527 inp = stcb->sctp_ep; 5528 /* if subset bound and don't allow ASCONF's, can't delete last */ 5529 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5530 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5531 if (stcb->sctp_ep->laddr_count < 2) { 5532 /* can't delete last address */ 5533 return; 5534 } 5535 } 5536 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5537 /* remove the address if it exists */ 5538 if (laddr->ifa == NULL) 5539 continue; 5540 if (laddr->ifa == ifa) { 5541 sctp_remove_laddr(laddr); 5542 return; 5543 } 5544 } 5545 5546 /* address not found! */ 5547 return; 5548 } 5549 5550 /* sysctl */ 5551 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5552 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5553 5554 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5555 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5556 int *sctp_cpuarry = NULL; 5557 5558 void 5559 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5560 { 5561 /* Queue a packet to a processor for the specified core */ 5562 struct sctp_mcore_queue *qent; 5563 struct sctp_mcore_ctrl *wkq; 5564 int need_wake = 0; 5565 5566 if (sctp_mcore_workers == NULL) { 5567 /* Something went way bad during setup */ 5568 sctp_input_with_port(m, off, 0); 5569 return; 5570 } 5571 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5572 (sizeof(struct sctp_mcore_queue)), 5573 SCTP_M_MCORE); 5574 if (qent == NULL) { 5575 /* This is trouble */ 5576 sctp_input_with_port(m, off, 0); 5577 return; 5578 } 5579 qent->vn = curvnet; 5580 qent->m = m; 5581 qent->off = off; 5582 qent->v6 = 0; 5583 wkq = &sctp_mcore_workers[cpu_to_use]; 5584 SCTP_MCORE_QLOCK(wkq); 5585 5586 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5587 if (wkq->running == 0) { 5588 need_wake = 1; 5589 } 5590 SCTP_MCORE_QUNLOCK(wkq); 5591 if (need_wake) { 5592 wakeup(&wkq->running); 5593 } 5594 } 5595 5596 static void 5597 sctp_mcore_thread(void *arg) 5598 { 5599 5600 struct sctp_mcore_ctrl *wkq; 5601 struct sctp_mcore_queue *qent; 5602 5603 wkq = (struct sctp_mcore_ctrl *)arg; 5604 struct mbuf *m; 5605 int off, v6; 5606 5607 /* Wait for first tickle */ 5608 SCTP_MCORE_LOCK(wkq); 5609 wkq->running = 0; 5610 msleep(&wkq->running, 5611 &wkq->core_mtx, 5612 0, "wait for pkt", 0); 5613 SCTP_MCORE_UNLOCK(wkq); 5614 5615 /* Bind to our cpu */ 5616 thread_lock(curthread); 5617 sched_bind(curthread, wkq->cpuid); 5618 thread_unlock(curthread); 5619 5620 /* Now lets start working */ 5621 SCTP_MCORE_LOCK(wkq); 5622 /* Now grab lock and go */ 5623 for (;;) { 5624 SCTP_MCORE_QLOCK(wkq); 5625 skip_sleep: 5626 wkq->running = 1; 5627 qent = TAILQ_FIRST(&wkq->que); 5628 if (qent) { 5629 TAILQ_REMOVE(&wkq->que, qent, next); 5630 SCTP_MCORE_QUNLOCK(wkq); 5631 CURVNET_SET(qent->vn); 5632 m = qent->m; 5633 off = qent->off; 5634 v6 = qent->v6; 5635 SCTP_FREE(qent, SCTP_M_MCORE); 5636 if (v6 == 0) { 5637 sctp_input_with_port(m, off, 0); 5638 } else { 5639 SCTP_PRINTF("V6 not yet supported\n"); 5640 sctp_m_freem(m); 5641 } 5642 CURVNET_RESTORE(); 5643 SCTP_MCORE_QLOCK(wkq); 5644 } 5645 wkq->running = 0; 5646 if (!TAILQ_EMPTY(&wkq->que)) { 5647 goto skip_sleep; 5648 } 5649 SCTP_MCORE_QUNLOCK(wkq); 5650 msleep(&wkq->running, 5651 &wkq->core_mtx, 5652 0, "wait for pkt", 0); 5653 } 5654 } 5655 5656 static void 5657 sctp_startup_mcore_threads(void) 5658 { 5659 int i, cpu; 5660 5661 if (mp_ncpus == 1) 5662 return; 5663 5664 if (sctp_mcore_workers != NULL) { 5665 /* 5666 * Already been here in some previous vnet? 5667 */ 5668 return; 5669 } 5670 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5671 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5672 SCTP_M_MCORE); 5673 if (sctp_mcore_workers == NULL) { 5674 /* TSNH I hope */ 5675 return; 5676 } 5677 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5678 sizeof(struct sctp_mcore_ctrl))); 5679 /* Init the structures */ 5680 for (i = 0; i <= mp_maxid; i++) { 5681 TAILQ_INIT(&sctp_mcore_workers[i].que); 5682 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5683 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5684 sctp_mcore_workers[i].cpuid = i; 5685 } 5686 if (sctp_cpuarry == NULL) { 5687 SCTP_MALLOC(sctp_cpuarry, int *, 5688 (mp_ncpus * sizeof(int)), 5689 SCTP_M_MCORE); 5690 i = 0; 5691 CPU_FOREACH(cpu) { 5692 sctp_cpuarry[i] = cpu; 5693 i++; 5694 } 5695 } 5696 /* Now start them all */ 5697 CPU_FOREACH(cpu) { 5698 (void)kproc_create(sctp_mcore_thread, 5699 (void *)&sctp_mcore_workers[cpu], 5700 &sctp_mcore_workers[cpu].thread_proc, 5701 0, 5702 SCTP_KTHREAD_PAGES, 5703 SCTP_MCORE_NAME); 5704 } 5705 } 5706 #endif 5707 5708 void 5709 sctp_pcb_init(void) 5710 { 5711 /* 5712 * SCTP initialization for the PCB structures should be called by 5713 * the sctp_init() function. 5714 */ 5715 int i; 5716 struct timeval tv; 5717 5718 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5719 /* error I was called twice */ 5720 return; 5721 } 5722 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5723 5724 #if defined(SCTP_LOCAL_TRACE_BUF) 5725 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5726 #endif 5727 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5728 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5729 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5730 SCTP_M_MCORE); 5731 #endif 5732 (void)SCTP_GETTIME_TIMEVAL(&tv); 5733 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5734 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5735 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5736 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5737 #else 5738 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5739 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5740 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5741 #endif 5742 /* init the empty list of (All) Endpoints */ 5743 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5744 5745 /* init the hash table of endpoints */ 5746 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5747 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5748 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5749 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5750 &SCTP_BASE_INFO(hashasocmark)); 5751 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5752 &SCTP_BASE_INFO(hashmark)); 5753 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5754 &SCTP_BASE_INFO(hashtcpmark)); 5755 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5756 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5757 &SCTP_BASE_INFO(hashvrfmark)); 5758 5759 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5760 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5761 /* init the zones */ 5762 /* 5763 * FIX ME: Should check for NULL returns, but if it does fail we are 5764 * doomed to panic anyways... add later maybe. 5765 */ 5766 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5767 sizeof(struct sctp_inpcb), maxsockets); 5768 5769 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5770 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5771 5772 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5773 sizeof(struct sctp_laddr), 5774 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5775 5776 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5777 sizeof(struct sctp_nets), 5778 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5779 5780 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5781 sizeof(struct sctp_tmit_chunk), 5782 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5783 5784 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5785 sizeof(struct sctp_queued_to_read), 5786 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5787 5788 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5789 sizeof(struct sctp_stream_queue_pending), 5790 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5791 5792 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5793 sizeof(struct sctp_asconf), 5794 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5795 5796 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5797 sizeof(struct sctp_asconf_ack), 5798 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5799 5800 /* Master Lock INIT for info structure */ 5801 SCTP_INP_INFO_LOCK_INIT(); 5802 SCTP_STATLOG_INIT_LOCK(); 5803 5804 SCTP_IPI_COUNT_INIT(); 5805 SCTP_IPI_ADDR_INIT(); 5806 #ifdef SCTP_PACKET_LOGGING 5807 SCTP_IP_PKTLOG_INIT(); 5808 #endif 5809 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5810 5811 SCTP_WQ_ADDR_INIT(); 5812 /* not sure if we need all the counts */ 5813 SCTP_BASE_INFO(ipi_count_ep) = 0; 5814 /* assoc/tcb zone info */ 5815 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5816 /* local addrlist zone info */ 5817 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5818 /* remote addrlist zone info */ 5819 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5820 /* chunk info */ 5821 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5822 5823 /* socket queue zone info */ 5824 SCTP_BASE_INFO(ipi_count_readq) = 0; 5825 5826 /* stream out queue cont */ 5827 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5828 5829 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5830 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5831 5832 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5833 5834 /* Init the TIMEWAIT list */ 5835 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5836 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5837 } 5838 sctp_startup_iterator(); 5839 5840 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5841 sctp_startup_mcore_threads(); 5842 #endif 5843 5844 /* 5845 * INIT the default VRF which for BSD is the only one, other O/S's 5846 * may have more. But initially they must start with one and then 5847 * add the VRF's as addresses are added. 5848 */ 5849 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5850 } 5851 5852 /* 5853 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5854 */ 5855 void 5856 sctp_pcb_finish(void) 5857 { 5858 struct sctp_vrflist *vrf_bucket; 5859 struct sctp_vrf *vrf, *nvrf; 5860 struct sctp_ifn *ifn, *nifn; 5861 struct sctp_ifa *ifa, *nifa; 5862 struct sctpvtaghead *chain; 5863 struct sctp_tagblock *twait_block, *prev_twait_block; 5864 struct sctp_laddr *wi, *nwi; 5865 int i; 5866 struct sctp_iterator *it, *nit; 5867 5868 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5869 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5870 return; 5871 } 5872 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5873 /* 5874 * In FreeBSD the iterator thread never exits but we do clean up. 5875 * The only way FreeBSD reaches here is if we have VRF's but we 5876 * still add the ifdef to make it compile on old versions. 5877 */ 5878 retry: 5879 SCTP_IPI_ITERATOR_WQ_LOCK(); 5880 /* 5881 * sctp_iterator_worker() might be working on an it entry without 5882 * holding the lock. We won't find it on the list either and 5883 * continue and free/destroy it. While holding the lock, spin, to 5884 * avoid the race condition as sctp_iterator_worker() will have to 5885 * wait to re-acquire the lock. 5886 */ 5887 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5888 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5889 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5890 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5891 DELAY(10); 5892 goto retry; 5893 } 5894 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5895 if (it->vn != curvnet) { 5896 continue; 5897 } 5898 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5899 if (it->function_atend != NULL) { 5900 (*it->function_atend) (it->pointer, it->val); 5901 } 5902 SCTP_FREE(it, SCTP_M_ITER); 5903 } 5904 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5905 SCTP_ITERATOR_LOCK(); 5906 if ((sctp_it_ctl.cur_it) && 5907 (sctp_it_ctl.cur_it->vn == curvnet)) { 5908 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5909 } 5910 SCTP_ITERATOR_UNLOCK(); 5911 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5912 SCTP_WQ_ADDR_LOCK(); 5913 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5914 LIST_REMOVE(wi, sctp_nxt_addr); 5915 SCTP_DECR_LADDR_COUNT(); 5916 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5917 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5918 } 5919 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5920 } 5921 SCTP_WQ_ADDR_UNLOCK(); 5922 5923 /* 5924 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5925 * destroyed first). 5926 */ 5927 SCTP_IPI_ADDR_WLOCK(); 5928 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5929 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5930 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5931 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5932 /* free the ifa */ 5933 LIST_REMOVE(ifa, next_bucket); 5934 LIST_REMOVE(ifa, next_ifa); 5935 SCTP_FREE(ifa, SCTP_M_IFA); 5936 } 5937 /* free the ifn */ 5938 LIST_REMOVE(ifn, next_bucket); 5939 LIST_REMOVE(ifn, next_ifn); 5940 SCTP_FREE(ifn, SCTP_M_IFN); 5941 } 5942 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5943 /* free the vrf */ 5944 LIST_REMOVE(vrf, next_vrf); 5945 SCTP_FREE(vrf, SCTP_M_VRF); 5946 } 5947 SCTP_IPI_ADDR_WUNLOCK(); 5948 /* free the vrf hashes */ 5949 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5950 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5951 5952 /* 5953 * free the TIMEWAIT list elements malloc'd in the function 5954 * sctp_add_vtag_to_timewait()... 5955 */ 5956 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5957 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5958 if (!LIST_EMPTY(chain)) { 5959 prev_twait_block = NULL; 5960 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5961 if (prev_twait_block) { 5962 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5963 } 5964 prev_twait_block = twait_block; 5965 } 5966 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5967 } 5968 } 5969 5970 /* free the locks and mutexes */ 5971 #ifdef SCTP_PACKET_LOGGING 5972 SCTP_IP_PKTLOG_DESTROY(); 5973 #endif 5974 SCTP_IPI_ADDR_DESTROY(); 5975 SCTP_STATLOG_DESTROY(); 5976 SCTP_INP_INFO_LOCK_DESTROY(); 5977 5978 SCTP_WQ_ADDR_DESTROY(); 5979 5980 /* Get rid of other stuff too. */ 5981 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5982 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5983 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5984 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5985 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5986 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5987 5988 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5989 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5990 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5991 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5992 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5993 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5994 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5995 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5996 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5997 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5998 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5999 #endif 6000 } 6001 6002 int 6003 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6004 int offset, int limit, 6005 struct sockaddr *src, struct sockaddr *dst, 6006 struct sockaddr *altsa, uint16_t port) 6007 { 6008 /* 6009 * grub through the INIT pulling addresses and loading them to the 6010 * nets structure in the asoc. The from address in the mbuf should 6011 * also be loaded (if it is not already). This routine can be called 6012 * with either INIT or INIT-ACK's as long as the m points to the IP 6013 * packet and the offset points to the beginning of the parameters. 6014 */ 6015 struct sctp_inpcb *inp; 6016 struct sctp_nets *net, *nnet, *net_tmp; 6017 struct sctp_paramhdr *phdr, param_buf; 6018 struct sctp_tcb *stcb_tmp; 6019 uint16_t ptype, plen; 6020 struct sockaddr *sa; 6021 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6022 struct sctp_auth_random *p_random = NULL; 6023 uint16_t random_len = 0; 6024 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6025 struct sctp_auth_hmac_algo *hmacs = NULL; 6026 uint16_t hmacs_len = 0; 6027 uint8_t saw_asconf = 0; 6028 uint8_t saw_asconf_ack = 0; 6029 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6030 struct sctp_auth_chunk_list *chunks = NULL; 6031 uint16_t num_chunks = 0; 6032 sctp_key_t *new_key; 6033 uint32_t keylen; 6034 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6035 uint8_t peer_supports_ecn; 6036 uint8_t peer_supports_prsctp; 6037 uint8_t peer_supports_auth; 6038 uint8_t peer_supports_asconf; 6039 uint8_t peer_supports_asconf_ack; 6040 uint8_t peer_supports_reconfig; 6041 uint8_t peer_supports_nrsack; 6042 uint8_t peer_supports_pktdrop; 6043 uint8_t peer_supports_idata; 6044 #ifdef INET 6045 struct sockaddr_in sin; 6046 #endif 6047 #ifdef INET6 6048 struct sockaddr_in6 sin6; 6049 #endif 6050 6051 /* First get the destination address setup too. */ 6052 #ifdef INET 6053 memset(&sin, 0, sizeof(sin)); 6054 sin.sin_family = AF_INET; 6055 sin.sin_len = sizeof(sin); 6056 sin.sin_port = stcb->rport; 6057 #endif 6058 #ifdef INET6 6059 memset(&sin6, 0, sizeof(sin6)); 6060 sin6.sin6_family = AF_INET6; 6061 sin6.sin6_len = sizeof(struct sockaddr_in6); 6062 sin6.sin6_port = stcb->rport; 6063 #endif 6064 if (altsa) { 6065 sa = altsa; 6066 } else { 6067 sa = src; 6068 } 6069 peer_supports_idata = 0; 6070 peer_supports_ecn = 0; 6071 peer_supports_prsctp = 0; 6072 peer_supports_auth = 0; 6073 peer_supports_asconf = 0; 6074 peer_supports_asconf_ack = 0; 6075 peer_supports_reconfig = 0; 6076 peer_supports_nrsack = 0; 6077 peer_supports_pktdrop = 0; 6078 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6079 /* mark all addresses that we have currently on the list */ 6080 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6081 } 6082 /* does the source address already exist? if so skip it */ 6083 inp = stcb->sctp_ep; 6084 atomic_add_int(&stcb->asoc.refcnt, 1); 6085 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6086 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6087 6088 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6089 /* we must add the source address */ 6090 /* no scope set here since we have a tcb already. */ 6091 switch (sa->sa_family) { 6092 #ifdef INET 6093 case AF_INET: 6094 if (stcb->asoc.scope.ipv4_addr_legal) { 6095 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6096 return (-1); 6097 } 6098 } 6099 break; 6100 #endif 6101 #ifdef INET6 6102 case AF_INET6: 6103 if (stcb->asoc.scope.ipv6_addr_legal) { 6104 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6105 return (-2); 6106 } 6107 } 6108 break; 6109 #endif 6110 default: 6111 break; 6112 } 6113 } else { 6114 if (net_tmp != NULL && stcb_tmp == stcb) { 6115 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6116 } else if (stcb_tmp != stcb) { 6117 /* It belongs to another association? */ 6118 if (stcb_tmp) 6119 SCTP_TCB_UNLOCK(stcb_tmp); 6120 return (-3); 6121 } 6122 } 6123 if (stcb->asoc.state == 0) { 6124 /* the assoc was freed? */ 6125 return (-4); 6126 } 6127 /* now we must go through each of the params. */ 6128 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6129 while (phdr) { 6130 ptype = ntohs(phdr->param_type); 6131 plen = ntohs(phdr->param_length); 6132 /* 6133 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6134 * (uint32_t)ptype, (int)plen); 6135 */ 6136 if (offset + plen > limit) { 6137 break; 6138 } 6139 if (plen < sizeof(struct sctp_paramhdr)) { 6140 break; 6141 } 6142 #ifdef INET 6143 if (ptype == SCTP_IPV4_ADDRESS) { 6144 if (stcb->asoc.scope.ipv4_addr_legal) { 6145 struct sctp_ipv4addr_param *p4, p4_buf; 6146 6147 /* ok get the v4 address and check/add */ 6148 phdr = sctp_get_next_param(m, offset, 6149 (struct sctp_paramhdr *)&p4_buf, 6150 sizeof(p4_buf)); 6151 if (plen != sizeof(struct sctp_ipv4addr_param) || 6152 phdr == NULL) { 6153 return (-5); 6154 } 6155 p4 = (struct sctp_ipv4addr_param *)phdr; 6156 sin.sin_addr.s_addr = p4->addr; 6157 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6158 /* Skip multi-cast addresses */ 6159 goto next_param; 6160 } 6161 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6162 (sin.sin_addr.s_addr == INADDR_ANY)) { 6163 goto next_param; 6164 } 6165 sa = (struct sockaddr *)&sin; 6166 inp = stcb->sctp_ep; 6167 atomic_add_int(&stcb->asoc.refcnt, 1); 6168 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6169 dst, stcb); 6170 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6171 6172 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6173 inp == NULL) { 6174 /* we must add the source address */ 6175 /* 6176 * no scope set since we have a tcb 6177 * already 6178 */ 6179 6180 /* 6181 * we must validate the state again 6182 * here 6183 */ 6184 add_it_now: 6185 if (stcb->asoc.state == 0) { 6186 /* the assoc was freed? */ 6187 return (-7); 6188 } 6189 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6190 return (-8); 6191 } 6192 } else if (stcb_tmp == stcb) { 6193 if (stcb->asoc.state == 0) { 6194 /* the assoc was freed? */ 6195 return (-10); 6196 } 6197 if (net != NULL) { 6198 /* clear flag */ 6199 net->dest_state &= 6200 ~SCTP_ADDR_NOT_IN_ASSOC; 6201 } 6202 } else { 6203 /* 6204 * strange, address is in another 6205 * assoc? straighten out locks. 6206 */ 6207 if (stcb_tmp) { 6208 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6209 struct mbuf *op_err; 6210 char msg[SCTP_DIAG_INFO_LEN]; 6211 6212 /* 6213 * in setup state we 6214 * abort this guy 6215 */ 6216 SCTP_SNPRINTF(msg, sizeof(msg), 6217 "%s:%d at %s", __FILE__, __LINE__, __func__); 6218 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6219 msg); 6220 sctp_abort_an_association(stcb_tmp->sctp_ep, 6221 stcb_tmp, op_err, false, 6222 SCTP_SO_NOT_LOCKED); 6223 goto add_it_now; 6224 } 6225 SCTP_TCB_UNLOCK(stcb_tmp); 6226 } 6227 6228 if (stcb->asoc.state == 0) { 6229 /* the assoc was freed? */ 6230 return (-12); 6231 } 6232 return (-13); 6233 } 6234 } 6235 } else 6236 #endif 6237 #ifdef INET6 6238 if (ptype == SCTP_IPV6_ADDRESS) { 6239 if (stcb->asoc.scope.ipv6_addr_legal) { 6240 /* ok get the v6 address and check/add */ 6241 struct sctp_ipv6addr_param *p6, p6_buf; 6242 6243 phdr = sctp_get_next_param(m, offset, 6244 (struct sctp_paramhdr *)&p6_buf, 6245 sizeof(p6_buf)); 6246 if (plen != sizeof(struct sctp_ipv6addr_param) || 6247 phdr == NULL) { 6248 return (-14); 6249 } 6250 p6 = (struct sctp_ipv6addr_param *)phdr; 6251 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6252 sizeof(p6->addr)); 6253 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6254 /* Skip multi-cast addresses */ 6255 goto next_param; 6256 } 6257 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6258 /* 6259 * Link local make no sense without 6260 * scope 6261 */ 6262 goto next_param; 6263 } 6264 sa = (struct sockaddr *)&sin6; 6265 inp = stcb->sctp_ep; 6266 atomic_add_int(&stcb->asoc.refcnt, 1); 6267 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6268 dst, stcb); 6269 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6270 if (stcb_tmp == NULL && 6271 (inp == stcb->sctp_ep || inp == NULL)) { 6272 /* 6273 * we must validate the state again 6274 * here 6275 */ 6276 add_it_now6: 6277 if (stcb->asoc.state == 0) { 6278 /* the assoc was freed? */ 6279 return (-16); 6280 } 6281 /* 6282 * we must add the address, no scope 6283 * set 6284 */ 6285 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6286 return (-17); 6287 } 6288 } else if (stcb_tmp == stcb) { 6289 /* 6290 * we must validate the state again 6291 * here 6292 */ 6293 if (stcb->asoc.state == 0) { 6294 /* the assoc was freed? */ 6295 return (-19); 6296 } 6297 if (net != NULL) { 6298 /* clear flag */ 6299 net->dest_state &= 6300 ~SCTP_ADDR_NOT_IN_ASSOC; 6301 } 6302 } else { 6303 /* 6304 * strange, address is in another 6305 * assoc? straighten out locks. 6306 */ 6307 if (stcb_tmp) { 6308 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6309 struct mbuf *op_err; 6310 char msg[SCTP_DIAG_INFO_LEN]; 6311 6312 /* 6313 * in setup state we 6314 * abort this guy 6315 */ 6316 SCTP_SNPRINTF(msg, sizeof(msg), 6317 "%s:%d at %s", __FILE__, __LINE__, __func__); 6318 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6319 msg); 6320 sctp_abort_an_association(stcb_tmp->sctp_ep, 6321 stcb_tmp, op_err, false, 6322 SCTP_SO_NOT_LOCKED); 6323 goto add_it_now6; 6324 } 6325 SCTP_TCB_UNLOCK(stcb_tmp); 6326 } 6327 if (stcb->asoc.state == 0) { 6328 /* the assoc was freed? */ 6329 return (-21); 6330 } 6331 return (-22); 6332 } 6333 } 6334 } else 6335 #endif 6336 if (ptype == SCTP_ECN_CAPABLE) { 6337 peer_supports_ecn = 1; 6338 } else if (ptype == SCTP_ULP_ADAPTATION) { 6339 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6340 struct sctp_adaptation_layer_indication ai, 6341 *aip; 6342 6343 phdr = sctp_get_next_param(m, offset, 6344 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6345 aip = (struct sctp_adaptation_layer_indication *)phdr; 6346 if (aip) { 6347 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6348 stcb->asoc.adaptation_needed = 1; 6349 } 6350 } 6351 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6352 struct sctp_asconf_addr_param lstore, *fee; 6353 int lptype; 6354 struct sockaddr *lsa = NULL; 6355 #ifdef INET 6356 struct sctp_asconf_addrv4_param *fii; 6357 #endif 6358 6359 if (stcb->asoc.asconf_supported == 0) { 6360 return (-100); 6361 } 6362 if (plen > sizeof(lstore)) { 6363 return (-23); 6364 } 6365 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6366 return (-101); 6367 } 6368 phdr = sctp_get_next_param(m, offset, 6369 (struct sctp_paramhdr *)&lstore, 6370 plen); 6371 if (phdr == NULL) { 6372 return (-24); 6373 } 6374 fee = (struct sctp_asconf_addr_param *)phdr; 6375 lptype = ntohs(fee->addrp.ph.param_type); 6376 switch (lptype) { 6377 #ifdef INET 6378 case SCTP_IPV4_ADDRESS: 6379 if (plen != 6380 sizeof(struct sctp_asconf_addrv4_param)) { 6381 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6382 (int)sizeof(struct sctp_asconf_addrv4_param), 6383 plen); 6384 } else { 6385 fii = (struct sctp_asconf_addrv4_param *)fee; 6386 sin.sin_addr.s_addr = fii->addrp.addr; 6387 lsa = (struct sockaddr *)&sin; 6388 } 6389 break; 6390 #endif 6391 #ifdef INET6 6392 case SCTP_IPV6_ADDRESS: 6393 if (plen != 6394 sizeof(struct sctp_asconf_addr_param)) { 6395 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6396 (int)sizeof(struct sctp_asconf_addr_param), 6397 plen); 6398 } else { 6399 memcpy(sin6.sin6_addr.s6_addr, 6400 fee->addrp.addr, 6401 sizeof(fee->addrp.addr)); 6402 lsa = (struct sockaddr *)&sin6; 6403 } 6404 break; 6405 #endif 6406 default: 6407 break; 6408 } 6409 if (lsa) { 6410 (void)sctp_set_primary_addr(stcb, sa, NULL); 6411 } 6412 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6413 stcb->asoc.peer_supports_nat = 1; 6414 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6415 /* Peer supports pr-sctp */ 6416 peer_supports_prsctp = 1; 6417 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6418 /* A supported extension chunk */ 6419 struct sctp_supported_chunk_types_param *pr_supported; 6420 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6421 int num_ent, i; 6422 6423 if (plen > sizeof(local_store)) { 6424 return (-35); 6425 } 6426 phdr = sctp_get_next_param(m, offset, 6427 (struct sctp_paramhdr *)&local_store, plen); 6428 if (phdr == NULL) { 6429 return (-25); 6430 } 6431 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6432 num_ent = plen - sizeof(struct sctp_paramhdr); 6433 for (i = 0; i < num_ent; i++) { 6434 switch (pr_supported->chunk_types[i]) { 6435 case SCTP_ASCONF: 6436 peer_supports_asconf = 1; 6437 break; 6438 case SCTP_ASCONF_ACK: 6439 peer_supports_asconf_ack = 1; 6440 break; 6441 case SCTP_FORWARD_CUM_TSN: 6442 peer_supports_prsctp = 1; 6443 break; 6444 case SCTP_PACKET_DROPPED: 6445 peer_supports_pktdrop = 1; 6446 break; 6447 case SCTP_NR_SELECTIVE_ACK: 6448 peer_supports_nrsack = 1; 6449 break; 6450 case SCTP_STREAM_RESET: 6451 peer_supports_reconfig = 1; 6452 break; 6453 case SCTP_AUTHENTICATION: 6454 peer_supports_auth = 1; 6455 break; 6456 case SCTP_IDATA: 6457 peer_supports_idata = 1; 6458 break; 6459 default: 6460 /* one I have not learned yet */ 6461 break; 6462 } 6463 } 6464 } else if (ptype == SCTP_RANDOM) { 6465 if (plen > sizeof(random_store)) 6466 break; 6467 if (got_random) { 6468 /* already processed a RANDOM */ 6469 goto next_param; 6470 } 6471 phdr = sctp_get_next_param(m, offset, 6472 (struct sctp_paramhdr *)random_store, 6473 plen); 6474 if (phdr == NULL) 6475 return (-26); 6476 p_random = (struct sctp_auth_random *)phdr; 6477 random_len = plen - sizeof(*p_random); 6478 /* enforce the random length */ 6479 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6480 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6481 return (-27); 6482 } 6483 got_random = 1; 6484 } else if (ptype == SCTP_HMAC_LIST) { 6485 uint16_t num_hmacs; 6486 uint16_t i; 6487 6488 if (plen > sizeof(hmacs_store)) 6489 break; 6490 if (got_hmacs) { 6491 /* already processed a HMAC list */ 6492 goto next_param; 6493 } 6494 phdr = sctp_get_next_param(m, offset, 6495 (struct sctp_paramhdr *)hmacs_store, 6496 plen); 6497 if (phdr == NULL) 6498 return (-28); 6499 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6500 hmacs_len = plen - sizeof(*hmacs); 6501 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6502 /* validate the hmac list */ 6503 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6504 return (-29); 6505 } 6506 if (stcb->asoc.peer_hmacs != NULL) 6507 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6508 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6509 if (stcb->asoc.peer_hmacs != NULL) { 6510 for (i = 0; i < num_hmacs; i++) { 6511 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6512 ntohs(hmacs->hmac_ids[i])); 6513 } 6514 } 6515 got_hmacs = 1; 6516 } else if (ptype == SCTP_CHUNK_LIST) { 6517 int i; 6518 6519 if (plen > sizeof(chunks_store)) 6520 break; 6521 if (got_chklist) { 6522 /* already processed a Chunks list */ 6523 goto next_param; 6524 } 6525 phdr = sctp_get_next_param(m, offset, 6526 (struct sctp_paramhdr *)chunks_store, 6527 plen); 6528 if (phdr == NULL) 6529 return (-30); 6530 chunks = (struct sctp_auth_chunk_list *)phdr; 6531 num_chunks = plen - sizeof(*chunks); 6532 if (stcb->asoc.peer_auth_chunks != NULL) 6533 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6534 else 6535 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6536 for (i = 0; i < num_chunks; i++) { 6537 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6538 stcb->asoc.peer_auth_chunks); 6539 /* record asconf/asconf-ack if listed */ 6540 if (chunks->chunk_types[i] == SCTP_ASCONF) 6541 saw_asconf = 1; 6542 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6543 saw_asconf_ack = 1; 6544 } 6545 got_chklist = 1; 6546 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6547 (ptype == SCTP_STATE_COOKIE) || 6548 (ptype == SCTP_UNRECOG_PARAM) || 6549 (ptype == SCTP_COOKIE_PRESERVE) || 6550 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6551 (ptype == SCTP_ADD_IP_ADDRESS) || 6552 (ptype == SCTP_DEL_IP_ADDRESS) || 6553 (ptype == SCTP_ERROR_CAUSE_IND) || 6554 (ptype == SCTP_SUCCESS_REPORT)) { 6555 /* don't care */ 6556 } else { 6557 if ((ptype & 0x8000) == 0x0000) { 6558 /* 6559 * must stop processing the rest of the 6560 * param's. Any report bits were handled 6561 * with the call to 6562 * sctp_arethere_unrecognized_parameters() 6563 * when the INIT or INIT-ACK was first seen. 6564 */ 6565 break; 6566 } 6567 } 6568 6569 next_param: 6570 offset += SCTP_SIZE32(plen); 6571 if (offset >= limit) { 6572 break; 6573 } 6574 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6575 sizeof(param_buf)); 6576 } 6577 /* Now check to see if we need to purge any addresses */ 6578 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6579 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6580 SCTP_ADDR_NOT_IN_ASSOC) { 6581 /* This address has been removed from the asoc */ 6582 /* remove and free it */ 6583 stcb->asoc.numnets--; 6584 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6585 if (net == stcb->asoc.alternate) { 6586 sctp_free_remote_addr(stcb->asoc.alternate); 6587 stcb->asoc.alternate = NULL; 6588 } 6589 if (net == stcb->asoc.primary_destination) { 6590 stcb->asoc.primary_destination = NULL; 6591 sctp_select_primary_destination(stcb); 6592 } 6593 sctp_free_remote_addr(net); 6594 } 6595 } 6596 if ((stcb->asoc.ecn_supported == 1) && 6597 (peer_supports_ecn == 0)) { 6598 stcb->asoc.ecn_supported = 0; 6599 } 6600 if ((stcb->asoc.prsctp_supported == 1) && 6601 (peer_supports_prsctp == 0)) { 6602 stcb->asoc.prsctp_supported = 0; 6603 } 6604 if ((stcb->asoc.auth_supported == 1) && 6605 ((peer_supports_auth == 0) || 6606 (got_random == 0) || (got_hmacs == 0))) { 6607 stcb->asoc.auth_supported = 0; 6608 } 6609 if ((stcb->asoc.asconf_supported == 1) && 6610 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6611 (stcb->asoc.auth_supported == 0) || 6612 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6613 stcb->asoc.asconf_supported = 0; 6614 } 6615 if ((stcb->asoc.reconfig_supported == 1) && 6616 (peer_supports_reconfig == 0)) { 6617 stcb->asoc.reconfig_supported = 0; 6618 } 6619 if ((stcb->asoc.idata_supported == 1) && 6620 (peer_supports_idata == 0)) { 6621 stcb->asoc.idata_supported = 0; 6622 } 6623 if ((stcb->asoc.nrsack_supported == 1) && 6624 (peer_supports_nrsack == 0)) { 6625 stcb->asoc.nrsack_supported = 0; 6626 } 6627 if ((stcb->asoc.pktdrop_supported == 1) && 6628 (peer_supports_pktdrop == 0)) { 6629 stcb->asoc.pktdrop_supported = 0; 6630 } 6631 /* validate authentication required parameters */ 6632 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6633 /* peer does not support auth but sent a chunks list? */ 6634 return (-31); 6635 } 6636 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6637 /* peer supports asconf but not auth? */ 6638 return (-32); 6639 } else if ((peer_supports_asconf == 1) && 6640 (peer_supports_auth == 1) && 6641 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6642 return (-33); 6643 } 6644 /* concatenate the full random key */ 6645 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6646 if (chunks != NULL) { 6647 keylen += sizeof(*chunks) + num_chunks; 6648 } 6649 new_key = sctp_alloc_key(keylen); 6650 if (new_key != NULL) { 6651 /* copy in the RANDOM */ 6652 if (p_random != NULL) { 6653 keylen = sizeof(*p_random) + random_len; 6654 memcpy(new_key->key, p_random, keylen); 6655 } else { 6656 keylen = 0; 6657 } 6658 /* append in the AUTH chunks */ 6659 if (chunks != NULL) { 6660 memcpy(new_key->key + keylen, chunks, 6661 sizeof(*chunks) + num_chunks); 6662 keylen += sizeof(*chunks) + num_chunks; 6663 } 6664 /* append in the HMACs */ 6665 if (hmacs != NULL) { 6666 memcpy(new_key->key + keylen, hmacs, 6667 sizeof(*hmacs) + hmacs_len); 6668 } 6669 } else { 6670 /* failed to get memory for the key */ 6671 return (-34); 6672 } 6673 if (stcb->asoc.authinfo.peer_random != NULL) 6674 sctp_free_key(stcb->asoc.authinfo.peer_random); 6675 stcb->asoc.authinfo.peer_random = new_key; 6676 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6677 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6678 6679 return (0); 6680 } 6681 6682 int 6683 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6684 struct sctp_nets *net) 6685 { 6686 /* make sure the requested primary address exists in the assoc */ 6687 if (net == NULL && sa) 6688 net = sctp_findnet(stcb, sa); 6689 6690 if (net == NULL) { 6691 /* didn't find the requested primary address! */ 6692 return (-1); 6693 } else { 6694 /* set the primary address */ 6695 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6696 /* Must be confirmed, so queue to set */ 6697 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6698 return (0); 6699 } 6700 stcb->asoc.primary_destination = net; 6701 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6702 sctp_free_remote_addr(stcb->asoc.alternate); 6703 stcb->asoc.alternate = NULL; 6704 } 6705 net = TAILQ_FIRST(&stcb->asoc.nets); 6706 if (net != stcb->asoc.primary_destination) { 6707 /* 6708 * first one on the list is NOT the primary 6709 * sctp_cmpaddr() is much more efficient if the 6710 * primary is the first on the list, make it so. 6711 */ 6712 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6713 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6714 } 6715 return (0); 6716 } 6717 } 6718 6719 bool 6720 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6721 { 6722 struct sctpasochead *head; 6723 struct sctp_tcb *stcb; 6724 6725 SCTP_INP_INFO_LOCK_ASSERT(); 6726 6727 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, SCTP_BASE_INFO(hashasocmark))]; 6728 LIST_FOREACH(stcb, head, sctp_asocs) { 6729 /* 6730 * We choose not to lock anything here. TCB's can't be 6731 * removed since we have the read lock, so they can't be 6732 * freed on us, same thing for the INP. I may be wrong with 6733 * this assumption, but we will go with it for now :-) 6734 */ 6735 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6736 continue; 6737 } 6738 if (stcb->asoc.my_vtag == tag) { 6739 /* candidate */ 6740 if (stcb->rport != rport) { 6741 continue; 6742 } 6743 if (stcb->sctp_ep->sctp_lport != lport) { 6744 continue; 6745 } 6746 /* The tag is currently used, so don't use it. */ 6747 return (false); 6748 } 6749 } 6750 return (!sctp_is_in_timewait(tag, lport, rport, (uint32_t)now->tv_sec)); 6751 } 6752 6753 static void 6754 sctp_drain_mbufs(struct sctp_tcb *stcb) 6755 { 6756 /* 6757 * We must hunt this association for MBUF's past the cumack (i.e. 6758 * out of order data that we can renege on). 6759 */ 6760 struct sctp_association *asoc; 6761 struct sctp_tmit_chunk *chk, *nchk; 6762 uint32_t cumulative_tsn_p1; 6763 struct sctp_queued_to_read *control, *ncontrol; 6764 int cnt, strmat; 6765 uint32_t gap, i; 6766 int fnd = 0; 6767 6768 /* We look for anything larger than the cum-ack + 1 */ 6769 6770 asoc = &stcb->asoc; 6771 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6772 /* none we can reneg on. */ 6773 return; 6774 } 6775 SCTP_STAT_INCR(sctps_protocol_drains_done); 6776 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6777 cnt = 0; 6778 /* Ok that was fun, now we will drain all the inbound streams? */ 6779 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6780 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6781 #ifdef INVARIANTS 6782 if (control->on_strm_q != SCTP_ON_ORDERED) { 6783 panic("Huh control: %p on_q: %d -- not ordered?", 6784 control, control->on_strm_q); 6785 } 6786 #endif 6787 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6788 /* Yep it is above cum-ack */ 6789 cnt++; 6790 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6791 KASSERT(control->length > 0, ("control has zero length")); 6792 if (asoc->size_on_all_streams >= control->length) { 6793 asoc->size_on_all_streams -= control->length; 6794 } else { 6795 #ifdef INVARIANTS 6796 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6797 #else 6798 asoc->size_on_all_streams = 0; 6799 #endif 6800 } 6801 sctp_ucount_decr(asoc->cnt_on_all_streams); 6802 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6803 if (control->on_read_q) { 6804 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6805 control->on_read_q = 0; 6806 } 6807 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6808 control->on_strm_q = 0; 6809 if (control->data) { 6810 sctp_m_freem(control->data); 6811 control->data = NULL; 6812 } 6813 sctp_free_remote_addr(control->whoFrom); 6814 /* Now its reasm? */ 6815 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6816 cnt++; 6817 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6818 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6819 if (asoc->size_on_reasm_queue >= chk->send_size) { 6820 asoc->size_on_reasm_queue -= chk->send_size; 6821 } else { 6822 #ifdef INVARIANTS 6823 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6824 #else 6825 asoc->size_on_reasm_queue = 0; 6826 #endif 6827 } 6828 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6829 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6830 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6831 if (chk->data) { 6832 sctp_m_freem(chk->data); 6833 chk->data = NULL; 6834 } 6835 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6836 } 6837 sctp_free_a_readq(stcb, control); 6838 } 6839 } 6840 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6841 #ifdef INVARIANTS 6842 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6843 panic("Huh control: %p on_q: %d -- not unordered?", 6844 control, control->on_strm_q); 6845 } 6846 #endif 6847 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6848 /* Yep it is above cum-ack */ 6849 cnt++; 6850 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6851 KASSERT(control->length > 0, ("control has zero length")); 6852 if (asoc->size_on_all_streams >= control->length) { 6853 asoc->size_on_all_streams -= control->length; 6854 } else { 6855 #ifdef INVARIANTS 6856 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6857 #else 6858 asoc->size_on_all_streams = 0; 6859 #endif 6860 } 6861 sctp_ucount_decr(asoc->cnt_on_all_streams); 6862 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6863 if (control->on_read_q) { 6864 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6865 control->on_read_q = 0; 6866 } 6867 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6868 control->on_strm_q = 0; 6869 if (control->data) { 6870 sctp_m_freem(control->data); 6871 control->data = NULL; 6872 } 6873 sctp_free_remote_addr(control->whoFrom); 6874 /* Now its reasm? */ 6875 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6876 cnt++; 6877 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6878 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6879 if (asoc->size_on_reasm_queue >= chk->send_size) { 6880 asoc->size_on_reasm_queue -= chk->send_size; 6881 } else { 6882 #ifdef INVARIANTS 6883 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6884 #else 6885 asoc->size_on_reasm_queue = 0; 6886 #endif 6887 } 6888 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6889 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6890 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6891 if (chk->data) { 6892 sctp_m_freem(chk->data); 6893 chk->data = NULL; 6894 } 6895 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6896 } 6897 sctp_free_a_readq(stcb, control); 6898 } 6899 } 6900 } 6901 if (cnt) { 6902 /* We must back down to see what the new highest is */ 6903 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6904 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6905 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6906 asoc->highest_tsn_inside_map = i; 6907 fnd = 1; 6908 break; 6909 } 6910 } 6911 if (!fnd) { 6912 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6913 } 6914 6915 /* 6916 * Question, should we go through the delivery queue? The 6917 * only reason things are on here is the app not reading OR 6918 * a p-d-api up. An attacker COULD send enough in to 6919 * initiate the PD-API and then send a bunch of stuff to 6920 * other streams... these would wind up on the delivery 6921 * queue.. and then we would not get to them. But in order 6922 * to do this I then have to back-track and un-deliver 6923 * sequence numbers in streams.. el-yucko. I think for now 6924 * we will NOT look at the delivery queue and leave it to be 6925 * something to consider later. An alternative would be to 6926 * abort the P-D-API with a notification and then deliver 6927 * the data.... Or another method might be to keep track of 6928 * how many times the situation occurs and if we see a 6929 * possible attack underway just abort the association. 6930 */ 6931 #ifdef SCTP_DEBUG 6932 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6933 #endif 6934 /* 6935 * Now do we need to find a new 6936 * asoc->highest_tsn_inside_map? 6937 */ 6938 asoc->last_revoke_count = cnt; 6939 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6940 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6941 /* sa_ignore NO_NULL_CHK */ 6942 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6943 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6944 } 6945 /* 6946 * Another issue, in un-setting the TSN's in the mapping array we 6947 * DID NOT adjust the highest_tsn marker. This will cause one of 6948 * two things to occur. It may cause us to do extra work in checking 6949 * for our mapping array movement. More importantly it may cause us 6950 * to SACK every datagram. This may not be a bad thing though since 6951 * we will recover once we get our cum-ack above and all this stuff 6952 * we dumped recovered. 6953 */ 6954 } 6955 6956 void 6957 sctp_drain() 6958 { 6959 /* 6960 * We must walk the PCB lists for ALL associations here. The system 6961 * is LOW on MBUF's and needs help. This is where reneging will 6962 * occur. We really hope this does NOT happen! 6963 */ 6964 VNET_ITERATOR_DECL(vnet_iter); 6965 VNET_LIST_RLOCK_NOSLEEP(); 6966 VNET_FOREACH(vnet_iter) { 6967 CURVNET_SET(vnet_iter); 6968 struct sctp_inpcb *inp; 6969 struct sctp_tcb *stcb; 6970 6971 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6972 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6973 #ifdef VIMAGE 6974 continue; 6975 #else 6976 return; 6977 #endif 6978 } 6979 SCTP_INP_INFO_RLOCK(); 6980 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6981 /* For each endpoint */ 6982 SCTP_INP_RLOCK(inp); 6983 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6984 /* For each association */ 6985 SCTP_TCB_LOCK(stcb); 6986 sctp_drain_mbufs(stcb); 6987 SCTP_TCB_UNLOCK(stcb); 6988 } 6989 SCTP_INP_RUNLOCK(inp); 6990 } 6991 SCTP_INP_INFO_RUNLOCK(); 6992 CURVNET_RESTORE(); 6993 } 6994 VNET_LIST_RUNLOCK_NOSLEEP(); 6995 } 6996 6997 /* 6998 * start a new iterator 6999 * iterates through all endpoints and associations based on the pcb_state 7000 * flags and asoc_state. "af" (mandatory) is executed for all matching 7001 * assocs and "ef" (optional) is executed when the iterator completes. 7002 * "inpf" (optional) is executed for each new endpoint as it is being 7003 * iterated through. inpe (optional) is called when the inp completes 7004 * its way through all the stcbs. 7005 */ 7006 int 7007 sctp_initiate_iterator(inp_func inpf, 7008 asoc_func af, 7009 inp_func inpe, 7010 uint32_t pcb_state, 7011 uint32_t pcb_features, 7012 uint32_t asoc_state, 7013 void *argp, 7014 uint32_t argi, 7015 end_func ef, 7016 struct sctp_inpcb *s_inp, 7017 uint8_t chunk_output_off) 7018 { 7019 struct sctp_iterator *it = NULL; 7020 7021 if (af == NULL) { 7022 return (-1); 7023 } 7024 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7025 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7026 SCTP_BASE_VAR(sctp_pcb_initialized)); 7027 return (-1); 7028 } 7029 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7030 SCTP_M_ITER); 7031 if (it == NULL) { 7032 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7033 return (-1); 7034 } 7035 memset(it, 0, sizeof(*it)); 7036 it->function_assoc = af; 7037 it->function_inp = inpf; 7038 if (inpf) 7039 it->done_current_ep = 0; 7040 else 7041 it->done_current_ep = 1; 7042 it->function_atend = ef; 7043 it->pointer = argp; 7044 it->val = argi; 7045 it->pcb_flags = pcb_state; 7046 it->pcb_features = pcb_features; 7047 it->asoc_state = asoc_state; 7048 it->function_inp_end = inpe; 7049 it->no_chunk_output = chunk_output_off; 7050 it->vn = curvnet; 7051 if (s_inp) { 7052 /* Assume lock is held here */ 7053 it->inp = s_inp; 7054 SCTP_INP_INCR_REF(it->inp); 7055 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7056 } else { 7057 SCTP_INP_INFO_RLOCK(); 7058 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7059 if (it->inp) { 7060 SCTP_INP_INCR_REF(it->inp); 7061 } 7062 SCTP_INP_INFO_RUNLOCK(); 7063 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7064 } 7065 SCTP_IPI_ITERATOR_WQ_LOCK(); 7066 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7067 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7068 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7069 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7070 SCTP_FREE(it, SCTP_M_ITER); 7071 return (-1); 7072 } 7073 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7074 if (sctp_it_ctl.iterator_running == 0) { 7075 sctp_wakeup_iterator(); 7076 } 7077 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7078 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7079 return (0); 7080 } 7081