1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <sys/proc.h> 40 #include <netinet/sctp_var.h> 41 #include <netinet/sctp_sysctl.h> 42 #include <netinet/sctp_pcb.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp.h> 45 #include <netinet/sctp_header.h> 46 #include <netinet/sctp_asconf.h> 47 #include <netinet/sctp_output.h> 48 #include <netinet/sctp_timer.h> 49 #include <netinet/sctp_bsd_addr.h> 50 #if defined(INET) || defined(INET6) 51 #include <netinet/udp.h> 52 #endif 53 #ifdef INET6 54 #include <netinet6/ip6_var.h> 55 #endif 56 #include <sys/sched.h> 57 #include <sys/smp.h> 58 #include <sys/unistd.h> 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 #endif 79 80 void 81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 82 { 83 /* 84 * We really don't need to lock this, but I will just because it 85 * does not hurt. 86 */ 87 SCTP_INP_INFO_RLOCK(); 88 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 89 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 90 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 91 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 92 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 93 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 94 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 95 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 96 SCTP_INP_INFO_RUNLOCK(); 97 } 98 99 /*- 100 * Addresses are added to VRF's (Virtual Router's). For BSD we 101 * have only the default VRF 0. We maintain a hash list of 102 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 103 * these has a list of addresses. When we add a new address 104 * to a VRF we lookup the ifn/ifn_index, if the ifn does 105 * not exist we create it and add it to the list of IFN's 106 * within the VRF. Once we have the sctp_ifn, we add the 107 * address to the list. So we look something like: 108 * 109 * hash-vrf-table 110 * vrf-> ifn-> ifn -> ifn 111 * vrf | 112 * ... +--ifa-> ifa -> ifa 113 * vrf 114 * 115 * We keep these separate lists since the SCTP subsystem will 116 * point to these from its source address selection nets structure. 117 * When an address is deleted it does not happen right away on 118 * the SCTP side, it gets scheduled. What we do when a 119 * delete happens is immediately remove the address from 120 * the master list and decrement the refcount. As our 121 * addip iterator works through and frees the src address 122 * selection pointing to the sctp_ifa, eventually the refcount 123 * will reach 0 and we will delete it. Note that it is assumed 124 * that any locking on system level ifn/ifa is done at the 125 * caller of these functions and these routines will only 126 * lock the SCTP structures as they add or delete things. 127 * 128 * Other notes on VRF concepts. 129 * - An endpoint can be in multiple VRF's 130 * - An association lives within a VRF and only one VRF. 131 * - Any incoming packet we can deduce the VRF for by 132 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 133 * - Any downward send call or connect call must supply the 134 * VRF via ancillary data or via some sort of set default 135 * VRF socket option call (again for BSD no brainer since 136 * the VRF is always 0). 137 * - An endpoint may add multiple VRF's to it. 138 * - Listening sockets can accept associations in any 139 * of the VRF's they are in but the assoc will end up 140 * in only one VRF (gotten from the packet or connect/send). 141 * 142 */ 143 144 struct sctp_vrf * 145 sctp_allocate_vrf(int vrf_id) 146 { 147 struct sctp_vrf *vrf = NULL; 148 struct sctp_vrflist *bucket; 149 150 /* First allocate the VRF structure */ 151 vrf = sctp_find_vrf(vrf_id); 152 if (vrf) { 153 /* Already allocated */ 154 return (vrf); 155 } 156 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 157 SCTP_M_VRF); 158 if (vrf == NULL) { 159 /* No memory */ 160 #ifdef INVARIANTS 161 panic("No memory for VRF:%d", vrf_id); 162 #endif 163 return (NULL); 164 } 165 /* setup the VRF */ 166 memset(vrf, 0, sizeof(struct sctp_vrf)); 167 vrf->vrf_id = vrf_id; 168 LIST_INIT(&vrf->ifnlist); 169 vrf->total_ifa_count = 0; 170 vrf->refcount = 0; 171 /* now also setup table ids */ 172 SCTP_INIT_VRF_TABLEID(vrf); 173 /* Init the HASH of addresses */ 174 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 175 &vrf->vrf_addr_hashmark); 176 if (vrf->vrf_addr_hash == NULL) { 177 /* No memory */ 178 #ifdef INVARIANTS 179 panic("No memory for VRF:%d", vrf_id); 180 #endif 181 SCTP_FREE(vrf, SCTP_M_VRF); 182 return (NULL); 183 } 184 185 /* Add it to the hash table */ 186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 187 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 189 return (vrf); 190 } 191 192 struct sctp_ifn * 193 sctp_find_ifn(void *ifn, uint32_t ifn_index) 194 { 195 struct sctp_ifn *sctp_ifnp; 196 struct sctp_ifnlist *hash_ifn_head; 197 198 /* 199 * We assume the lock is held for the addresses if that's wrong 200 * problems could occur :-) 201 */ 202 SCTP_IPI_ADDR_LOCK_ASSERT(); 203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 205 if (sctp_ifnp->ifn_index == ifn_index) { 206 return (sctp_ifnp); 207 } 208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 209 return (sctp_ifnp); 210 } 211 } 212 return (NULL); 213 } 214 215 struct sctp_vrf * 216 sctp_find_vrf(uint32_t vrf_id) 217 { 218 struct sctp_vrflist *bucket; 219 struct sctp_vrf *liste; 220 221 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 222 LIST_FOREACH(liste, bucket, next_vrf) { 223 if (vrf_id == liste->vrf_id) { 224 return (liste); 225 } 226 } 227 return (NULL); 228 } 229 230 void 231 sctp_free_vrf(struct sctp_vrf *vrf) 232 { 233 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 234 if (vrf->vrf_addr_hash) { 235 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 236 vrf->vrf_addr_hash = NULL; 237 } 238 /* We zero'd the count */ 239 LIST_REMOVE(vrf, next_vrf); 240 SCTP_FREE(vrf, SCTP_M_VRF); 241 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 242 } 243 } 244 245 void 246 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 247 { 248 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 249 /* We zero'd the count */ 250 if (sctp_ifnp->vrf) { 251 sctp_free_vrf(sctp_ifnp->vrf); 252 } 253 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 254 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 255 } 256 } 257 258 void 259 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 260 { 261 struct sctp_ifn *sctp_ifnp; 262 263 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 264 if (sctp_ifnp != NULL) { 265 sctp_ifnp->ifn_mtu = mtu; 266 } 267 } 268 269 void 270 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 271 { 272 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 273 /* We zero'd the count */ 274 if (sctp_ifap->ifn_p) { 275 sctp_free_ifn(sctp_ifap->ifn_p); 276 } 277 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 278 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 279 } 280 } 281 282 static void 283 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 284 { 285 struct sctp_ifn *found; 286 287 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 288 if (found == NULL) { 289 /* Not in the list.. sorry */ 290 return; 291 } 292 if (hold_addr_lock == 0) { 293 SCTP_IPI_ADDR_WLOCK(); 294 } else { 295 SCTP_IPI_ADDR_WLOCK_ASSERT(); 296 } 297 LIST_REMOVE(sctp_ifnp, next_bucket); 298 LIST_REMOVE(sctp_ifnp, next_ifn); 299 if (hold_addr_lock == 0) { 300 SCTP_IPI_ADDR_WUNLOCK(); 301 } 302 /* Take away the reference, and possibly free it */ 303 sctp_free_ifn(sctp_ifnp); 304 } 305 306 void 307 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 308 const char *if_name, uint32_t ifn_index) 309 { 310 struct sctp_vrf *vrf; 311 struct sctp_ifa *sctp_ifap; 312 313 SCTP_IPI_ADDR_RLOCK(); 314 vrf = sctp_find_vrf(vrf_id); 315 if (vrf == NULL) { 316 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 317 goto out; 318 } 319 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 320 if (sctp_ifap == NULL) { 321 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 322 goto out; 323 } 324 if (sctp_ifap->ifn_p == NULL) { 325 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 326 goto out; 327 } 328 if (if_name) { 329 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 331 sctp_ifap->ifn_p->ifn_name, if_name); 332 goto out; 333 } 334 } else { 335 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 337 sctp_ifap->ifn_p->ifn_index, ifn_index); 338 goto out; 339 } 340 } 341 342 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 343 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 344 out: 345 SCTP_IPI_ADDR_RUNLOCK(); 346 } 347 348 void 349 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 350 const char *if_name, uint32_t ifn_index) 351 { 352 struct sctp_vrf *vrf; 353 struct sctp_ifa *sctp_ifap; 354 355 SCTP_IPI_ADDR_RLOCK(); 356 vrf = sctp_find_vrf(vrf_id); 357 if (vrf == NULL) { 358 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 359 goto out; 360 } 361 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 362 if (sctp_ifap == NULL) { 363 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 364 goto out; 365 } 366 if (sctp_ifap->ifn_p == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 368 goto out; 369 } 370 if (if_name) { 371 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 372 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 373 sctp_ifap->ifn_p->ifn_name, if_name); 374 goto out; 375 } 376 } else { 377 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 379 sctp_ifap->ifn_p->ifn_index, ifn_index); 380 goto out; 381 } 382 } 383 384 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 385 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 386 out: 387 SCTP_IPI_ADDR_RUNLOCK(); 388 } 389 390 /*- 391 * Add an ifa to an ifn. 392 * Register the interface as necessary. 393 * NOTE: ADDR write lock MUST be held. 394 */ 395 static void 396 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 397 { 398 int ifa_af; 399 400 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 401 sctp_ifap->ifn_p = sctp_ifnp; 402 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 403 /* update address counts */ 404 sctp_ifnp->ifa_count++; 405 ifa_af = sctp_ifap->address.sa.sa_family; 406 switch (ifa_af) { 407 #ifdef INET 408 case AF_INET: 409 sctp_ifnp->num_v4++; 410 break; 411 #endif 412 #ifdef INET6 413 case AF_INET6: 414 sctp_ifnp->num_v6++; 415 break; 416 #endif 417 default: 418 break; 419 } 420 if (sctp_ifnp->ifa_count == 1) { 421 /* register the new interface */ 422 sctp_ifnp->registered_af = ifa_af; 423 } 424 } 425 426 /*- 427 * Remove an ifa from its ifn. 428 * If no more addresses exist, remove the ifn too. Otherwise, re-register 429 * the interface based on the remaining address families left. 430 * NOTE: ADDR write lock MUST be held. 431 */ 432 static void 433 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 434 { 435 LIST_REMOVE(sctp_ifap, next_ifa); 436 if (sctp_ifap->ifn_p) { 437 /* update address counts */ 438 sctp_ifap->ifn_p->ifa_count--; 439 switch (sctp_ifap->address.sa.sa_family) { 440 #ifdef INET 441 case AF_INET: 442 sctp_ifap->ifn_p->num_v4--; 443 break; 444 #endif 445 #ifdef INET6 446 case AF_INET6: 447 sctp_ifap->ifn_p->num_v6--; 448 break; 449 #endif 450 default: 451 break; 452 } 453 454 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 455 /* remove the ifn, possibly freeing it */ 456 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 457 } else { 458 /* re-register address family type, if needed */ 459 if ((sctp_ifap->ifn_p->num_v6 == 0) && 460 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 461 sctp_ifap->ifn_p->registered_af = AF_INET; 462 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 463 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 464 sctp_ifap->ifn_p->registered_af = AF_INET6; 465 } 466 /* free the ifn refcount */ 467 sctp_free_ifn(sctp_ifap->ifn_p); 468 } 469 sctp_ifap->ifn_p = NULL; 470 } 471 } 472 473 struct sctp_ifa * 474 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 475 uint32_t ifn_type, const char *if_name, void *ifa, 476 struct sockaddr *addr, uint32_t ifa_flags, 477 int dynamic_add) 478 { 479 struct sctp_vrf *vrf; 480 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp; 481 struct sctp_ifa *sctp_ifap, *new_sctp_ifap; 482 struct sctp_ifalist *hash_addr_head; 483 struct sctp_ifnlist *hash_ifn_head; 484 uint32_t hash_of_addr; 485 int new_ifn_af = 0; 486 487 #ifdef SCTP_DEBUG 488 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 489 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 490 #endif 491 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *, 492 sizeof(struct sctp_ifn), SCTP_M_IFN); 493 if (new_sctp_ifnp == NULL) { 494 #ifdef INVARIANTS 495 panic("No memory for IFN"); 496 #endif 497 return (NULL); 498 } 499 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 500 if (new_sctp_ifap == NULL) { 501 #ifdef INVARIANTS 502 panic("No memory for IFA"); 503 #endif 504 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 505 return (NULL); 506 } 507 508 SCTP_IPI_ADDR_WLOCK(); 509 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 510 if (sctp_ifnp) { 511 vrf = sctp_ifnp->vrf; 512 } else { 513 vrf = sctp_find_vrf(vrf_id); 514 if (vrf == NULL) { 515 vrf = sctp_allocate_vrf(vrf_id); 516 if (vrf == NULL) { 517 SCTP_IPI_ADDR_WUNLOCK(); 518 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 519 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 520 return (NULL); 521 } 522 } 523 } 524 if (sctp_ifnp == NULL) { 525 /* 526 * build one and add it, can't hold lock until after malloc 527 * done though. 528 */ 529 sctp_ifnp = new_sctp_ifnp; 530 new_sctp_ifnp = NULL; 531 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 532 sctp_ifnp->ifn_index = ifn_index; 533 sctp_ifnp->ifn_p = ifn; 534 sctp_ifnp->ifn_type = ifn_type; 535 sctp_ifnp->refcount = 0; 536 sctp_ifnp->vrf = vrf; 537 atomic_add_int(&vrf->refcount, 1); 538 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 539 if (if_name != NULL) { 540 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 541 } else { 542 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 543 } 544 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 545 LIST_INIT(&sctp_ifnp->ifalist); 546 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 547 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 548 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 549 new_ifn_af = 1; 550 } 551 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 552 if (sctp_ifap) { 553 /* Hmm, it already exists? */ 554 if ((sctp_ifap->ifn_p) && 555 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 556 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 557 sctp_ifap->ifn_p->ifn_name, ifn_index, 558 (void *)sctp_ifap); 559 if (new_ifn_af) { 560 /* Remove the created one that we don't want */ 561 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 562 } 563 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 564 /* easy to solve, just switch back to active */ 565 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 566 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 567 sctp_ifap->ifn_p = sctp_ifnp; 568 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 569 } 570 exit_stage_left: 571 SCTP_IPI_ADDR_WUNLOCK(); 572 if (new_sctp_ifnp != NULL) { 573 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 574 } 575 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 576 return (sctp_ifap); 577 } else { 578 if (sctp_ifap->ifn_p) { 579 /* 580 * The last IFN gets the address, remove the 581 * old one 582 */ 583 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 584 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 585 sctp_ifap->ifn_p->ifn_index, if_name, 586 ifn_index); 587 /* remove the address from the old ifn */ 588 sctp_remove_ifa_from_ifn(sctp_ifap); 589 /* move the address over to the new ifn */ 590 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 591 goto exit_stage_left; 592 } else { 593 /* repair ifnp which was NULL ? */ 594 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 595 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 596 (void *)sctp_ifnp, (void *)sctp_ifap); 597 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 598 } 599 goto exit_stage_left; 600 } 601 } 602 sctp_ifap = new_sctp_ifap; 603 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 604 sctp_ifap->ifn_p = sctp_ifnp; 605 atomic_add_int(&sctp_ifnp->refcount, 1); 606 sctp_ifap->vrf_id = vrf_id; 607 sctp_ifap->ifa = ifa; 608 memcpy(&sctp_ifap->address, addr, addr->sa_len); 609 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 610 sctp_ifap->flags = ifa_flags; 611 /* Set scope */ 612 switch (sctp_ifap->address.sa.sa_family) { 613 #ifdef INET 614 case AF_INET: 615 { 616 struct sockaddr_in *sin; 617 618 sin = &sctp_ifap->address.sin; 619 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 620 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 621 sctp_ifap->src_is_loop = 1; 622 } 623 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 624 sctp_ifap->src_is_priv = 1; 625 } 626 sctp_ifnp->num_v4++; 627 if (new_ifn_af) 628 new_ifn_af = AF_INET; 629 break; 630 } 631 #endif 632 #ifdef INET6 633 case AF_INET6: 634 { 635 /* ok to use deprecated addresses? */ 636 struct sockaddr_in6 *sin6; 637 638 sin6 = &sctp_ifap->address.sin6; 639 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 640 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 641 sctp_ifap->src_is_loop = 1; 642 } 643 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 644 sctp_ifap->src_is_priv = 1; 645 } 646 sctp_ifnp->num_v6++; 647 if (new_ifn_af) 648 new_ifn_af = AF_INET6; 649 break; 650 } 651 #endif 652 default: 653 new_ifn_af = 0; 654 break; 655 } 656 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 657 658 if ((sctp_ifap->src_is_priv == 0) && 659 (sctp_ifap->src_is_loop == 0)) { 660 sctp_ifap->src_is_glob = 1; 661 } 662 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 663 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 664 sctp_ifap->refcount = 1; 665 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 666 sctp_ifnp->ifa_count++; 667 vrf->total_ifa_count++; 668 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 669 if (new_ifn_af) { 670 sctp_ifnp->registered_af = new_ifn_af; 671 } 672 SCTP_IPI_ADDR_WUNLOCK(); 673 if (new_sctp_ifnp != NULL) { 674 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 675 } 676 677 if (dynamic_add) { 678 /* 679 * Bump up the refcount so that when the timer completes it 680 * will drop back down. 681 */ 682 struct sctp_laddr *wi; 683 684 atomic_add_int(&sctp_ifap->refcount, 1); 685 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 686 if (wi == NULL) { 687 /* 688 * Gak, what can we do? We have lost an address 689 * change can you say HOSED? 690 */ 691 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 692 /* Opps, must decrement the count */ 693 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 694 if_name); 695 return (NULL); 696 } 697 SCTP_INCR_LADDR_COUNT(); 698 memset(wi, 0, sizeof(*wi)); 699 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 700 wi->ifa = sctp_ifap; 701 wi->action = SCTP_ADD_IP_ADDRESS; 702 703 SCTP_WQ_ADDR_LOCK(); 704 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 705 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 706 (struct sctp_inpcb *)NULL, 707 (struct sctp_tcb *)NULL, 708 (struct sctp_nets *)NULL); 709 SCTP_WQ_ADDR_UNLOCK(); 710 } else { 711 /* it's ready for use */ 712 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 713 } 714 return (sctp_ifap); 715 } 716 717 void 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 719 uint32_t ifn_index, const char *if_name) 720 { 721 struct sctp_vrf *vrf; 722 struct sctp_ifa *sctp_ifap = NULL; 723 724 SCTP_IPI_ADDR_WLOCK(); 725 vrf = sctp_find_vrf(vrf_id); 726 if (vrf == NULL) { 727 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 728 goto out_now; 729 } 730 731 #ifdef SCTP_DEBUG 732 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 733 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 734 #endif 735 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 736 if (sctp_ifap) { 737 /* Validate the delete */ 738 if (sctp_ifap->ifn_p) { 739 int valid = 0; 740 741 /*- 742 * The name has priority over the ifn_index 743 * if its given. 744 */ 745 if (if_name) { 746 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 747 /* They match its a correct delete */ 748 valid = 1; 749 } 750 } 751 if (!valid) { 752 /* last ditch check ifn_index */ 753 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 754 valid = 1; 755 } 756 } 757 if (!valid) { 758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 759 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 760 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 761 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 762 SCTP_IPI_ADDR_WUNLOCK(); 763 return; 764 } 765 } 766 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 767 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 768 /* 769 * We don't set the flag. This means that the structure will 770 * hang around in EP's that have bound specific to it until 771 * they close. This gives us TCP like behavior if someone 772 * removes an address (or for that matter adds it right 773 * back). 774 */ 775 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 776 vrf->total_ifa_count--; 777 LIST_REMOVE(sctp_ifap, next_bucket); 778 sctp_remove_ifa_from_ifn(sctp_ifap); 779 } 780 #ifdef SCTP_DEBUG 781 else { 782 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 783 ifn_index); 784 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 785 } 786 #endif 787 788 out_now: 789 SCTP_IPI_ADDR_WUNLOCK(); 790 if (sctp_ifap) { 791 struct sctp_laddr *wi; 792 793 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 794 if (wi == NULL) { 795 /* 796 * Gak, what can we do? We have lost an address 797 * change can you say HOSED? 798 */ 799 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 800 801 /* Oops, must decrement the count */ 802 sctp_free_ifa(sctp_ifap); 803 return; 804 } 805 SCTP_INCR_LADDR_COUNT(); 806 memset(wi, 0, sizeof(*wi)); 807 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 808 wi->ifa = sctp_ifap; 809 wi->action = SCTP_DEL_IP_ADDRESS; 810 SCTP_WQ_ADDR_LOCK(); 811 /* 812 * Should this really be a tailq? As it is we will process 813 * the newest first :-0 814 */ 815 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 816 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 817 (struct sctp_inpcb *)NULL, 818 (struct sctp_tcb *)NULL, 819 (struct sctp_nets *)NULL); 820 SCTP_WQ_ADDR_UNLOCK(); 821 } 822 return; 823 } 824 825 static int 826 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 827 { 828 int loopback_scope; 829 #if defined(INET) 830 int ipv4_local_scope, ipv4_addr_legal; 831 #endif 832 #if defined(INET6) 833 int local_scope, site_scope, ipv6_addr_legal; 834 #endif 835 struct sctp_vrf *vrf; 836 struct sctp_ifn *sctp_ifn; 837 struct sctp_ifa *sctp_ifa; 838 839 loopback_scope = stcb->asoc.scope.loopback_scope; 840 #if defined(INET) 841 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 842 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 843 #endif 844 #if defined(INET6) 845 local_scope = stcb->asoc.scope.local_scope; 846 site_scope = stcb->asoc.scope.site_scope; 847 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 848 #endif 849 850 SCTP_IPI_ADDR_RLOCK(); 851 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 852 if (vrf == NULL) { 853 /* no vrf, no addresses */ 854 SCTP_IPI_ADDR_RUNLOCK(); 855 return (0); 856 } 857 858 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 859 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 860 if ((loopback_scope == 0) && 861 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 862 continue; 863 } 864 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 865 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 866 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 867 /* 868 * We allow pending addresses, where 869 * we have sent an asconf-add to be 870 * considered valid. 871 */ 872 continue; 873 } 874 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 875 continue; 876 } 877 switch (sctp_ifa->address.sa.sa_family) { 878 #ifdef INET 879 case AF_INET: 880 if (ipv4_addr_legal) { 881 struct sockaddr_in *sin, 882 *rsin; 883 884 sin = &sctp_ifa->address.sin; 885 rsin = (struct sockaddr_in *)to; 886 if ((ipv4_local_scope == 0) && 887 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 888 continue; 889 } 890 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 891 &sin->sin_addr) != 0) { 892 continue; 893 } 894 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 895 SCTP_IPI_ADDR_RUNLOCK(); 896 return (1); 897 } 898 } 899 break; 900 #endif 901 #ifdef INET6 902 case AF_INET6: 903 if (ipv6_addr_legal) { 904 struct sockaddr_in6 *sin6, 905 *rsin6; 906 907 sin6 = &sctp_ifa->address.sin6; 908 rsin6 = (struct sockaddr_in6 *)to; 909 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 910 &sin6->sin6_addr) != 0) { 911 continue; 912 } 913 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 914 if (local_scope == 0) 915 continue; 916 if (sin6->sin6_scope_id == 0) { 917 if (sa6_recoverscope(sin6) != 0) 918 continue; 919 } 920 } 921 if ((site_scope == 0) && 922 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 923 continue; 924 } 925 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 926 SCTP_IPI_ADDR_RUNLOCK(); 927 return (1); 928 } 929 } 930 break; 931 #endif 932 default: 933 /* TSNH */ 934 break; 935 } 936 } 937 } 938 } else { 939 struct sctp_laddr *laddr; 940 941 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 942 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 943 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 944 continue; 945 } 946 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 947 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 948 /* 949 * We allow pending addresses, where we have 950 * sent an asconf-add to be considered 951 * valid. 952 */ 953 continue; 954 } 955 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 956 continue; 957 } 958 switch (to->sa_family) { 959 #ifdef INET 960 case AF_INET: 961 { 962 struct sockaddr_in *sin, *rsin; 963 964 sin = &laddr->ifa->address.sin; 965 rsin = (struct sockaddr_in *)to; 966 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 967 SCTP_IPI_ADDR_RUNLOCK(); 968 return (1); 969 } 970 break; 971 } 972 #endif 973 #ifdef INET6 974 case AF_INET6: 975 { 976 struct sockaddr_in6 *sin6, *rsin6; 977 978 sin6 = &laddr->ifa->address.sin6; 979 rsin6 = (struct sockaddr_in6 *)to; 980 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 981 SCTP_IPI_ADDR_RUNLOCK(); 982 return (1); 983 } 984 break; 985 } 986 987 #endif 988 default: 989 /* TSNH */ 990 break; 991 } 992 } 993 } 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (0); 996 } 997 998 static struct sctp_tcb * 999 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1000 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1001 { 1002 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1003 /* 1004 * If we support the TCP model, then we must now dig through to see 1005 * if we can find our endpoint in the list of tcp ep's. 1006 */ 1007 uint16_t lport, rport; 1008 struct sctppcbhead *ephead; 1009 struct sctp_inpcb *inp; 1010 struct sctp_laddr *laddr; 1011 struct sctp_tcb *stcb; 1012 struct sctp_nets *net; 1013 1014 if ((to == NULL) || (from == NULL)) { 1015 return (NULL); 1016 } 1017 1018 switch (to->sa_family) { 1019 #ifdef INET 1020 case AF_INET: 1021 if (from->sa_family == AF_INET) { 1022 lport = ((struct sockaddr_in *)to)->sin_port; 1023 rport = ((struct sockaddr_in *)from)->sin_port; 1024 } else { 1025 return (NULL); 1026 } 1027 break; 1028 #endif 1029 #ifdef INET6 1030 case AF_INET6: 1031 if (from->sa_family == AF_INET6) { 1032 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1033 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1034 } else { 1035 return (NULL); 1036 } 1037 break; 1038 #endif 1039 default: 1040 return (NULL); 1041 } 1042 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1043 /* 1044 * Ok now for each of the guys in this bucket we must look and see: 1045 * - Does the remote port match. - Does there single association's 1046 * addresses match this address (to). If so we update p_ep to point 1047 * to this ep and return the tcb from it. 1048 */ 1049 LIST_FOREACH(inp, ephead, sctp_hash) { 1050 SCTP_INP_RLOCK(inp); 1051 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1052 SCTP_INP_RUNLOCK(inp); 1053 continue; 1054 } 1055 if (lport != inp->sctp_lport) { 1056 SCTP_INP_RUNLOCK(inp); 1057 continue; 1058 } 1059 switch (to->sa_family) { 1060 #ifdef INET 1061 case AF_INET: 1062 { 1063 struct sockaddr_in *sin; 1064 1065 sin = (struct sockaddr_in *)to; 1066 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1067 &sin->sin_addr) != 0) { 1068 SCTP_INP_RUNLOCK(inp); 1069 continue; 1070 } 1071 break; 1072 } 1073 #endif 1074 #ifdef INET6 1075 case AF_INET6: 1076 { 1077 struct sockaddr_in6 *sin6; 1078 1079 sin6 = (struct sockaddr_in6 *)to; 1080 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1081 &sin6->sin6_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 default: 1089 SCTP_INP_RUNLOCK(inp); 1090 continue; 1091 } 1092 if (inp->def_vrf_id != vrf_id) { 1093 SCTP_INP_RUNLOCK(inp); 1094 continue; 1095 } 1096 /* check to see if the ep has one of the addresses */ 1097 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1098 /* We are NOT bound all, so look further */ 1099 int match = 0; 1100 1101 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1102 if (laddr->ifa == NULL) { 1103 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1104 continue; 1105 } 1106 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1107 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1108 continue; 1109 } 1110 if (laddr->ifa->address.sa.sa_family == 1111 to->sa_family) { 1112 /* see if it matches */ 1113 #ifdef INET 1114 if (from->sa_family == AF_INET) { 1115 struct sockaddr_in *intf_addr, 1116 *sin; 1117 1118 intf_addr = &laddr->ifa->address.sin; 1119 sin = (struct sockaddr_in *)to; 1120 if (sin->sin_addr.s_addr == 1121 intf_addr->sin_addr.s_addr) { 1122 match = 1; 1123 break; 1124 } 1125 } 1126 #endif 1127 #ifdef INET6 1128 if (from->sa_family == AF_INET6) { 1129 struct sockaddr_in6 *intf_addr6; 1130 struct sockaddr_in6 *sin6; 1131 1132 sin6 = (struct sockaddr_in6 *) 1133 to; 1134 intf_addr6 = &laddr->ifa->address.sin6; 1135 1136 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1137 intf_addr6)) { 1138 match = 1; 1139 break; 1140 } 1141 } 1142 #endif 1143 } 1144 } 1145 if (match == 0) { 1146 /* This endpoint does not have this address */ 1147 SCTP_INP_RUNLOCK(inp); 1148 continue; 1149 } 1150 } 1151 /* 1152 * Ok if we hit here the ep has the address, does it hold 1153 * the tcb? 1154 */ 1155 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1156 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1157 if (stcb == NULL) { 1158 SCTP_INP_RUNLOCK(inp); 1159 continue; 1160 } 1161 SCTP_TCB_LOCK(stcb); 1162 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1163 SCTP_TCB_UNLOCK(stcb); 1164 SCTP_INP_RUNLOCK(inp); 1165 continue; 1166 } 1167 if (stcb->rport != rport) { 1168 /* remote port does not match. */ 1169 SCTP_TCB_UNLOCK(stcb); 1170 SCTP_INP_RUNLOCK(inp); 1171 continue; 1172 } 1173 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1174 SCTP_TCB_UNLOCK(stcb); 1175 SCTP_INP_RUNLOCK(inp); 1176 continue; 1177 } 1178 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1179 SCTP_TCB_UNLOCK(stcb); 1180 SCTP_INP_RUNLOCK(inp); 1181 continue; 1182 } 1183 /* Does this TCB have a matching address? */ 1184 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1185 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1186 /* not the same family, can't be a match */ 1187 continue; 1188 } 1189 switch (from->sa_family) { 1190 #ifdef INET 1191 case AF_INET: 1192 { 1193 struct sockaddr_in *sin, *rsin; 1194 1195 sin = (struct sockaddr_in *)&net->ro._l_addr; 1196 rsin = (struct sockaddr_in *)from; 1197 if (sin->sin_addr.s_addr == 1198 rsin->sin_addr.s_addr) { 1199 /* found it */ 1200 if (netp != NULL) { 1201 *netp = net; 1202 } 1203 /* 1204 * Update the endpoint 1205 * pointer 1206 */ 1207 *inp_p = inp; 1208 SCTP_INP_RUNLOCK(inp); 1209 return (stcb); 1210 } 1211 break; 1212 } 1213 #endif 1214 #ifdef INET6 1215 case AF_INET6: 1216 { 1217 struct sockaddr_in6 *sin6, *rsin6; 1218 1219 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1220 rsin6 = (struct sockaddr_in6 *)from; 1221 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1222 rsin6)) { 1223 /* found it */ 1224 if (netp != NULL) { 1225 *netp = net; 1226 } 1227 /* 1228 * Update the endpoint 1229 * pointer 1230 */ 1231 *inp_p = inp; 1232 SCTP_INP_RUNLOCK(inp); 1233 return (stcb); 1234 } 1235 break; 1236 } 1237 #endif 1238 default: 1239 /* TSNH */ 1240 break; 1241 } 1242 } 1243 SCTP_TCB_UNLOCK(stcb); 1244 SCTP_INP_RUNLOCK(inp); 1245 } 1246 return (NULL); 1247 } 1248 1249 /* 1250 * rules for use 1251 * 1252 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1253 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1254 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1255 * NULL. 1256 */ 1257 1258 struct sctp_tcb * 1259 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1260 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1261 { 1262 struct sctpasochead *head; 1263 struct sctp_inpcb *inp; 1264 struct sctp_tcb *stcb = NULL; 1265 struct sctp_nets *net; 1266 uint16_t rport; 1267 1268 inp = *inp_p; 1269 switch (remote->sa_family) { 1270 #ifdef INET 1271 case AF_INET: 1272 rport = (((struct sockaddr_in *)remote)->sin_port); 1273 break; 1274 #endif 1275 #ifdef INET6 1276 case AF_INET6: 1277 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1278 break; 1279 #endif 1280 default: 1281 return (NULL); 1282 } 1283 if (locked_tcb) { 1284 /* 1285 * UN-lock so we can do proper locking here this occurs when 1286 * called from load_addresses_from_init. 1287 */ 1288 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1289 SCTP_TCB_UNLOCK(locked_tcb); 1290 } 1291 SCTP_INP_INFO_RLOCK(); 1292 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1293 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1294 /*- 1295 * Now either this guy is our listener or it's the 1296 * connector. If it is the one that issued the connect, then 1297 * it's only chance is to be the first TCB in the list. If 1298 * it is the acceptor, then do the special_lookup to hash 1299 * and find the real inp. 1300 */ 1301 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1302 /* to is peer addr, from is my addr */ 1303 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1304 netp, inp->def_vrf_id); 1305 if ((stcb != NULL) && (locked_tcb == NULL)) { 1306 /* we have a locked tcb, lower refcount */ 1307 SCTP_INP_DECR_REF(inp); 1308 } 1309 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1310 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1311 SCTP_TCB_LOCK(locked_tcb); 1312 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1313 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1314 } 1315 SCTP_INP_INFO_RUNLOCK(); 1316 return (stcb); 1317 } else { 1318 SCTP_INP_WLOCK(inp); 1319 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1320 goto null_return; 1321 } 1322 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1323 if (stcb == NULL) { 1324 goto null_return; 1325 } 1326 SCTP_TCB_LOCK(stcb); 1327 1328 if (stcb->rport != rport) { 1329 /* remote port does not match. */ 1330 SCTP_TCB_UNLOCK(stcb); 1331 goto null_return; 1332 } 1333 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1334 SCTP_TCB_UNLOCK(stcb); 1335 goto null_return; 1336 } 1337 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1338 SCTP_TCB_UNLOCK(stcb); 1339 goto null_return; 1340 } 1341 /* now look at the list of remote addresses */ 1342 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1343 #ifdef INVARIANTS 1344 if (net == (TAILQ_NEXT(net, sctp_next))) { 1345 panic("Corrupt net list"); 1346 } 1347 #endif 1348 if (net->ro._l_addr.sa.sa_family != 1349 remote->sa_family) { 1350 /* not the same family */ 1351 continue; 1352 } 1353 switch (remote->sa_family) { 1354 #ifdef INET 1355 case AF_INET: 1356 { 1357 struct sockaddr_in *sin, 1358 *rsin; 1359 1360 sin = (struct sockaddr_in *) 1361 &net->ro._l_addr; 1362 rsin = (struct sockaddr_in *)remote; 1363 if (sin->sin_addr.s_addr == 1364 rsin->sin_addr.s_addr) { 1365 /* found it */ 1366 if (netp != NULL) { 1367 *netp = net; 1368 } 1369 if (locked_tcb == NULL) { 1370 SCTP_INP_DECR_REF(inp); 1371 } else if (locked_tcb != stcb) { 1372 SCTP_TCB_LOCK(locked_tcb); 1373 } 1374 if (locked_tcb) { 1375 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1376 } 1377 1378 SCTP_INP_WUNLOCK(inp); 1379 SCTP_INP_INFO_RUNLOCK(); 1380 return (stcb); 1381 } 1382 break; 1383 } 1384 #endif 1385 #ifdef INET6 1386 case AF_INET6: 1387 { 1388 struct sockaddr_in6 *sin6, 1389 *rsin6; 1390 1391 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1392 rsin6 = (struct sockaddr_in6 *)remote; 1393 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1394 rsin6)) { 1395 /* found it */ 1396 if (netp != NULL) { 1397 *netp = net; 1398 } 1399 if (locked_tcb == NULL) { 1400 SCTP_INP_DECR_REF(inp); 1401 } else if (locked_tcb != stcb) { 1402 SCTP_TCB_LOCK(locked_tcb); 1403 } 1404 if (locked_tcb) { 1405 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1406 } 1407 SCTP_INP_WUNLOCK(inp); 1408 SCTP_INP_INFO_RUNLOCK(); 1409 return (stcb); 1410 } 1411 break; 1412 } 1413 #endif 1414 default: 1415 /* TSNH */ 1416 break; 1417 } 1418 } 1419 SCTP_TCB_UNLOCK(stcb); 1420 } 1421 } else { 1422 SCTP_INP_WLOCK(inp); 1423 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1424 goto null_return; 1425 } 1426 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1427 inp->sctp_hashmark)]; 1428 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1429 if (stcb->rport != rport) { 1430 /* remote port does not match */ 1431 continue; 1432 } 1433 SCTP_TCB_LOCK(stcb); 1434 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1435 SCTP_TCB_UNLOCK(stcb); 1436 continue; 1437 } 1438 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1439 SCTP_TCB_UNLOCK(stcb); 1440 continue; 1441 } 1442 /* now look at the list of remote addresses */ 1443 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1444 #ifdef INVARIANTS 1445 if (net == (TAILQ_NEXT(net, sctp_next))) { 1446 panic("Corrupt net list"); 1447 } 1448 #endif 1449 if (net->ro._l_addr.sa.sa_family != 1450 remote->sa_family) { 1451 /* not the same family */ 1452 continue; 1453 } 1454 switch (remote->sa_family) { 1455 #ifdef INET 1456 case AF_INET: 1457 { 1458 struct sockaddr_in *sin, 1459 *rsin; 1460 1461 sin = (struct sockaddr_in *) 1462 &net->ro._l_addr; 1463 rsin = (struct sockaddr_in *)remote; 1464 if (sin->sin_addr.s_addr == 1465 rsin->sin_addr.s_addr) { 1466 /* found it */ 1467 if (netp != NULL) { 1468 *netp = net; 1469 } 1470 if (locked_tcb == NULL) { 1471 SCTP_INP_DECR_REF(inp); 1472 } else if (locked_tcb != stcb) { 1473 SCTP_TCB_LOCK(locked_tcb); 1474 } 1475 if (locked_tcb) { 1476 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1477 } 1478 SCTP_INP_WUNLOCK(inp); 1479 SCTP_INP_INFO_RUNLOCK(); 1480 return (stcb); 1481 } 1482 break; 1483 } 1484 #endif 1485 #ifdef INET6 1486 case AF_INET6: 1487 { 1488 struct sockaddr_in6 *sin6, 1489 *rsin6; 1490 1491 sin6 = (struct sockaddr_in6 *) 1492 &net->ro._l_addr; 1493 rsin6 = (struct sockaddr_in6 *)remote; 1494 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1495 rsin6)) { 1496 /* found it */ 1497 if (netp != NULL) { 1498 *netp = net; 1499 } 1500 if (locked_tcb == NULL) { 1501 SCTP_INP_DECR_REF(inp); 1502 } else if (locked_tcb != stcb) { 1503 SCTP_TCB_LOCK(locked_tcb); 1504 } 1505 if (locked_tcb) { 1506 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1507 } 1508 SCTP_INP_WUNLOCK(inp); 1509 SCTP_INP_INFO_RUNLOCK(); 1510 return (stcb); 1511 } 1512 break; 1513 } 1514 #endif 1515 default: 1516 /* TSNH */ 1517 break; 1518 } 1519 } 1520 SCTP_TCB_UNLOCK(stcb); 1521 } 1522 } 1523 null_return: 1524 /* clean up for returning null */ 1525 if (locked_tcb) { 1526 SCTP_TCB_LOCK(locked_tcb); 1527 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1528 } 1529 SCTP_INP_WUNLOCK(inp); 1530 SCTP_INP_INFO_RUNLOCK(); 1531 /* not found */ 1532 return (NULL); 1533 } 1534 1535 /* 1536 * Find an association for a specific endpoint using the association id given 1537 * out in the COMM_UP notification 1538 */ 1539 struct sctp_tcb * 1540 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1541 { 1542 /* 1543 * Use my the assoc_id to find a endpoint 1544 */ 1545 struct sctpasochead *head; 1546 struct sctp_tcb *stcb; 1547 uint32_t id; 1548 1549 if (inp->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 = SCTP_DEFAULT_MAXSEGMENT; 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 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2502 SCTP_INP_READ_INIT(inp); 2503 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2504 /* lock the new ep */ 2505 SCTP_INP_WLOCK(inp); 2506 2507 /* add it to the info area */ 2508 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2509 SCTP_INP_INFO_WUNLOCK(); 2510 2511 TAILQ_INIT(&inp->read_queue); 2512 LIST_INIT(&inp->sctp_addr_list); 2513 2514 LIST_INIT(&inp->sctp_asoc_list); 2515 2516 #ifdef SCTP_TRACK_FREED_ASOCS 2517 /* TEMP CODE */ 2518 LIST_INIT(&inp->sctp_asoc_free_list); 2519 #endif 2520 /* Init the timer structure for signature change */ 2521 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2522 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2523 2524 /* now init the actual endpoint default data */ 2525 m = &inp->sctp_ep; 2526 2527 /* setup the base timeout information */ 2528 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2529 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2530 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2531 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2532 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2533 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2534 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2535 /* all max/min max are in ms */ 2536 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2537 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2538 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2539 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2540 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2541 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2542 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2543 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2544 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2545 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2546 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2547 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2548 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2549 2550 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2551 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2552 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2553 /* number of streams to pre-open on a association */ 2554 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2555 2556 m->default_mtu = 0; 2557 /* Add adaptation cookie */ 2558 m->adaptation_layer_indicator = 0; 2559 m->adaptation_layer_indicator_provided = 0; 2560 2561 /* seed random number generator */ 2562 m->random_counter = 1; 2563 m->store_at = SCTP_SIGNATURE_SIZE; 2564 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2565 sctp_fill_random_store(m); 2566 2567 /* Minimum cookie size */ 2568 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2569 sizeof(struct sctp_state_cookie); 2570 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2571 2572 /* Setup the initial secret */ 2573 (void)SCTP_GETTIME_TIMEVAL(&time); 2574 m->time_of_secret_change = (unsigned int)time.tv_sec; 2575 2576 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2577 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2578 } 2579 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2580 2581 /* How long is a cookie good for ? */ 2582 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2583 /* 2584 * Initialize authentication parameters 2585 */ 2586 m->local_hmacs = sctp_default_supported_hmaclist(); 2587 m->local_auth_chunks = sctp_alloc_chunklist(); 2588 if (inp->asconf_supported) { 2589 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2590 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2591 } 2592 m->default_dscp = 0; 2593 #ifdef INET6 2594 m->default_flowlabel = 0; 2595 #endif 2596 m->port = 0; /* encapsulation disabled by default */ 2597 LIST_INIT(&m->shared_keys); 2598 /* add default NULL key as key id 0 */ 2599 null_key = sctp_alloc_sharedkey(); 2600 sctp_insert_sharedkey(&m->shared_keys, null_key); 2601 SCTP_INP_WUNLOCK(inp); 2602 #ifdef SCTP_LOG_CLOSING 2603 sctp_log_closing(inp, NULL, 12); 2604 #endif 2605 return (error); 2606 } 2607 2608 void 2609 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2610 struct sctp_tcb *stcb) 2611 { 2612 struct sctp_nets *net; 2613 uint16_t lport, rport; 2614 struct sctppcbhead *head; 2615 struct sctp_laddr *laddr, *oladdr; 2616 2617 atomic_add_int(&stcb->asoc.refcnt, 1); 2618 SCTP_TCB_UNLOCK(stcb); 2619 SCTP_INP_INFO_WLOCK(); 2620 SCTP_INP_WLOCK(old_inp); 2621 SCTP_INP_WLOCK(new_inp); 2622 SCTP_TCB_LOCK(stcb); 2623 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2624 2625 new_inp->sctp_ep.time_of_secret_change = 2626 old_inp->sctp_ep.time_of_secret_change; 2627 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2628 sizeof(old_inp->sctp_ep.secret_key)); 2629 new_inp->sctp_ep.current_secret_number = 2630 old_inp->sctp_ep.current_secret_number; 2631 new_inp->sctp_ep.last_secret_number = 2632 old_inp->sctp_ep.last_secret_number; 2633 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2634 2635 /* make it so new data pours into the new socket */ 2636 stcb->sctp_socket = new_inp->sctp_socket; 2637 stcb->sctp_ep = new_inp; 2638 2639 /* Copy the port across */ 2640 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2641 rport = stcb->rport; 2642 /* Pull the tcb from the old association */ 2643 LIST_REMOVE(stcb, sctp_tcbhash); 2644 LIST_REMOVE(stcb, sctp_tcblist); 2645 if (stcb->asoc.in_asocid_hash) { 2646 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2647 } 2648 /* Now insert the new_inp into the TCP connected hash */ 2649 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2650 2651 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2652 /* Its safe to access */ 2653 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2654 2655 /* Now move the tcb into the endpoint list */ 2656 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2657 /* 2658 * Question, do we even need to worry about the ep-hash since we 2659 * only have one connection? Probably not :> so lets get rid of it 2660 * and not suck up any kernel memory in that. 2661 */ 2662 if (stcb->asoc.in_asocid_hash) { 2663 struct sctpasochead *lhd; 2664 2665 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2666 new_inp->hashasocidmark)]; 2667 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2668 } 2669 /* Ok. Let's restart timer. */ 2670 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2671 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2672 stcb, net); 2673 } 2674 2675 SCTP_INP_INFO_WUNLOCK(); 2676 if (new_inp->sctp_tcbhash != NULL) { 2677 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2678 new_inp->sctp_tcbhash = NULL; 2679 } 2680 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2681 /* Subset bound, so copy in the laddr list from the old_inp */ 2682 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2683 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2684 if (laddr == NULL) { 2685 /* 2686 * Gak, what can we do? This assoc is really 2687 * HOSED. We probably should send an abort 2688 * here. 2689 */ 2690 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2691 continue; 2692 } 2693 SCTP_INCR_LADDR_COUNT(); 2694 memset(laddr, 0, sizeof(*laddr)); 2695 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2696 laddr->ifa = oladdr->ifa; 2697 atomic_add_int(&laddr->ifa->refcount, 1); 2698 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2699 sctp_nxt_addr); 2700 new_inp->laddr_count++; 2701 if (oladdr == stcb->asoc.last_used_address) { 2702 stcb->asoc.last_used_address = laddr; 2703 } 2704 } 2705 } 2706 /* Now any running timers need to be adjusted. */ 2707 if (stcb->asoc.dack_timer.ep == old_inp) { 2708 SCTP_INP_DECR_REF(old_inp); 2709 stcb->asoc.dack_timer.ep = new_inp; 2710 SCTP_INP_INCR_REF(new_inp); 2711 } 2712 if (stcb->asoc.asconf_timer.ep == old_inp) { 2713 SCTP_INP_DECR_REF(old_inp); 2714 stcb->asoc.asconf_timer.ep = new_inp; 2715 SCTP_INP_INCR_REF(new_inp); 2716 } 2717 if (stcb->asoc.strreset_timer.ep == old_inp) { 2718 SCTP_INP_DECR_REF(old_inp); 2719 stcb->asoc.strreset_timer.ep = new_inp; 2720 SCTP_INP_INCR_REF(new_inp); 2721 } 2722 if (stcb->asoc.shut_guard_timer.ep == old_inp) { 2723 SCTP_INP_DECR_REF(old_inp); 2724 stcb->asoc.shut_guard_timer.ep = new_inp; 2725 SCTP_INP_INCR_REF(new_inp); 2726 } 2727 if (stcb->asoc.autoclose_timer.ep == old_inp) { 2728 SCTP_INP_DECR_REF(old_inp); 2729 stcb->asoc.autoclose_timer.ep = new_inp; 2730 SCTP_INP_INCR_REF(new_inp); 2731 } 2732 if (stcb->asoc.delete_prim_timer.ep == old_inp) { 2733 SCTP_INP_DECR_REF(old_inp); 2734 stcb->asoc.delete_prim_timer.ep = new_inp; 2735 SCTP_INP_INCR_REF(new_inp); 2736 } 2737 /* now what about the nets? */ 2738 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2739 if (net->pmtu_timer.ep == old_inp) { 2740 SCTP_INP_DECR_REF(old_inp); 2741 net->pmtu_timer.ep = new_inp; 2742 SCTP_INP_INCR_REF(new_inp); 2743 } 2744 if (net->hb_timer.ep == old_inp) { 2745 SCTP_INP_DECR_REF(old_inp); 2746 net->hb_timer.ep = new_inp; 2747 SCTP_INP_INCR_REF(new_inp); 2748 } 2749 if (net->rxt_timer.ep == old_inp) { 2750 SCTP_INP_DECR_REF(old_inp); 2751 net->rxt_timer.ep = new_inp; 2752 SCTP_INP_INCR_REF(new_inp); 2753 } 2754 } 2755 SCTP_INP_WUNLOCK(new_inp); 2756 SCTP_INP_WUNLOCK(old_inp); 2757 } 2758 2759 /* 2760 * insert an laddr entry with the given ifa for the desired list 2761 */ 2762 static int 2763 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2764 { 2765 struct sctp_laddr *laddr; 2766 2767 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2768 if (laddr == NULL) { 2769 /* out of memory? */ 2770 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2771 return (EINVAL); 2772 } 2773 SCTP_INCR_LADDR_COUNT(); 2774 memset(laddr, 0, sizeof(*laddr)); 2775 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2776 laddr->ifa = ifa; 2777 laddr->action = act; 2778 atomic_add_int(&ifa->refcount, 1); 2779 /* insert it */ 2780 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2781 2782 return (0); 2783 } 2784 2785 /* 2786 * Remove an laddr entry from the local address list (on an assoc) 2787 */ 2788 static void 2789 sctp_remove_laddr(struct sctp_laddr *laddr) 2790 { 2791 2792 /* remove from the list */ 2793 LIST_REMOVE(laddr, sctp_nxt_addr); 2794 sctp_free_ifa(laddr->ifa); 2795 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2796 SCTP_DECR_LADDR_COUNT(); 2797 } 2798 2799 /* 2800 * Bind the socket, with the PCB and global info locks held. Note, if a 2801 * socket address is specified, the PCB lock may be dropped and re-acquired. 2802 * 2803 * sctp_ifap is used to bypass normal local address validation checks. 2804 */ 2805 int 2806 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr, 2807 struct sctp_ifa *sctp_ifap, struct thread *td) 2808 { 2809 /* bind a ep to a socket address */ 2810 struct sctppcbhead *head; 2811 struct sctp_inpcb *inp_tmp; 2812 struct inpcb *ip_inp; 2813 int port_reuse_active = 0; 2814 int bindall; 2815 uint16_t lport; 2816 int error; 2817 uint32_t vrf_id; 2818 2819 KASSERT(td != NULL, ("%s: null thread", __func__)); 2820 2821 error = 0; 2822 lport = 0; 2823 bindall = 1; 2824 ip_inp = &inp->ip_inp.inp; 2825 2826 SCTP_INP_INFO_WLOCK_ASSERT(); 2827 SCTP_INP_WLOCK_ASSERT(inp); 2828 2829 #ifdef SCTP_DEBUG 2830 if (addr) { 2831 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2832 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2833 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2834 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2835 } 2836 #endif 2837 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2838 error = EINVAL; 2839 /* already did a bind, subsequent binds NOT allowed ! */ 2840 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2841 goto out; 2842 } 2843 if (addr != NULL) { 2844 switch (addr->sa_family) { 2845 #ifdef INET 2846 case AF_INET: 2847 { 2848 struct sockaddr_in *sin; 2849 2850 /* IPV6_V6ONLY socket? */ 2851 if (SCTP_IPV6_V6ONLY(inp)) { 2852 error = EINVAL; 2853 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2854 goto out; 2855 } 2856 if (addr->sa_len != sizeof(*sin)) { 2857 error = EINVAL; 2858 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2859 goto out; 2860 } 2861 2862 sin = (struct sockaddr_in *)addr; 2863 lport = sin->sin_port; 2864 /* 2865 * For LOOPBACK the prison_local_ip4() call 2866 * will transmute the ip address to the 2867 * proper value. 2868 */ 2869 if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) { 2870 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2871 goto out; 2872 } 2873 if (sin->sin_addr.s_addr != INADDR_ANY) { 2874 bindall = 0; 2875 } 2876 break; 2877 } 2878 #endif 2879 #ifdef INET6 2880 case AF_INET6: 2881 { 2882 /* 2883 * Only for pure IPv6 Address. (No IPv4 2884 * Mapped!) 2885 */ 2886 struct sockaddr_in6 *sin6; 2887 2888 sin6 = (struct sockaddr_in6 *)addr; 2889 if (addr->sa_len != sizeof(*sin6)) { 2890 error = EINVAL; 2891 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2892 goto out; 2893 } 2894 lport = sin6->sin6_port; 2895 /* 2896 * For LOOPBACK the prison_local_ip6() call 2897 * will transmute the ipv6 address to the 2898 * proper value. 2899 */ 2900 if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr, 2901 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2902 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2903 goto out; 2904 } 2905 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2906 bindall = 0; 2907 /* KAME hack: embed scopeid */ 2908 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2909 error = EINVAL; 2910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2911 goto out; 2912 } 2913 } 2914 /* this must be cleared for ifa_ifwithaddr() */ 2915 sin6->sin6_scope_id = 0; 2916 break; 2917 } 2918 #endif 2919 default: 2920 error = EAFNOSUPPORT; 2921 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2922 goto out; 2923 } 2924 } 2925 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2926 vrf_id = inp->def_vrf_id; 2927 2928 if (lport) { 2929 /* 2930 * Did the caller specify a port? if so we must see if an ep 2931 * already has this one bound. 2932 */ 2933 /* got to be root to get at low ports */ 2934 if (ntohs(lport) < IPPORT_RESERVED && 2935 (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 2936 goto out; 2937 } 2938 SCTP_INP_INCR_REF(inp); 2939 SCTP_INP_WUNLOCK(inp); 2940 if (bindall) { 2941 vrf_id = inp->def_vrf_id; 2942 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2943 if (inp_tmp != NULL) { 2944 /* 2945 * lock guy returned and lower count note 2946 * that we are not bound so inp_tmp should 2947 * NEVER be inp. And it is this inp 2948 * (inp_tmp) that gets the reference bump, 2949 * so we must lower it. 2950 */ 2951 SCTP_INP_DECR_REF(inp_tmp); 2952 /* unlock info */ 2953 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2954 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2955 /* 2956 * Ok, must be one-2-one and 2957 * allowing port re-use 2958 */ 2959 port_reuse_active = 1; 2960 goto continue_anyway; 2961 } 2962 SCTP_INP_WLOCK(inp); 2963 SCTP_INP_DECR_REF(inp); 2964 error = EADDRINUSE; 2965 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2966 goto out; 2967 } 2968 } else { 2969 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2970 if (inp_tmp != NULL) { 2971 /* 2972 * lock guy returned and lower count note 2973 * that we are not bound so inp_tmp should 2974 * NEVER be inp. And it is this inp 2975 * (inp_tmp) that gets the reference bump, 2976 * so we must lower it. 2977 */ 2978 SCTP_INP_DECR_REF(inp_tmp); 2979 /* unlock info */ 2980 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2981 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2982 /* 2983 * Ok, must be one-2-one and 2984 * allowing port re-use 2985 */ 2986 port_reuse_active = 1; 2987 goto continue_anyway; 2988 } 2989 SCTP_INP_WLOCK(inp); 2990 SCTP_INP_DECR_REF(inp); 2991 error = EADDRINUSE; 2992 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2993 goto out; 2994 } 2995 } 2996 continue_anyway: 2997 SCTP_INP_WLOCK(inp); 2998 SCTP_INP_DECR_REF(inp); 2999 if (bindall) { 3000 /* verify that no lport is not used by a singleton */ 3001 if ((port_reuse_active == 0) && 3002 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3003 /* Sorry someone already has this one bound */ 3004 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3005 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3006 port_reuse_active = 1; 3007 } else { 3008 error = EADDRINUSE; 3009 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3010 goto out; 3011 } 3012 } 3013 } 3014 } else { 3015 uint16_t first, last, candidate; 3016 uint16_t count; 3017 3018 if (ip_inp->inp_flags & INP_HIGHPORT) { 3019 first = MODULE_GLOBAL(ipport_hifirstauto); 3020 last = MODULE_GLOBAL(ipport_hilastauto); 3021 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3022 if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 3023 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3024 goto out; 3025 } 3026 first = MODULE_GLOBAL(ipport_lowfirstauto); 3027 last = MODULE_GLOBAL(ipport_lowlastauto); 3028 } else { 3029 first = MODULE_GLOBAL(ipport_firstauto); 3030 last = MODULE_GLOBAL(ipport_lastauto); 3031 } 3032 if (first > last) { 3033 uint16_t temp; 3034 3035 temp = first; 3036 first = last; 3037 last = temp; 3038 } 3039 count = last - first + 1; /* number of candidates */ 3040 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3041 3042 for (;;) { 3043 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3044 lport = htons(candidate); 3045 break; 3046 } 3047 if (--count == 0) { 3048 error = EADDRINUSE; 3049 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3050 goto out; 3051 } 3052 if (candidate == last) 3053 candidate = first; 3054 else 3055 candidate = candidate + 1; 3056 } 3057 } 3058 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3059 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3060 /* 3061 * this really should not happen. The guy did a non-blocking 3062 * bind and then did a close at the same time. 3063 */ 3064 error = EINVAL; 3065 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3066 goto out; 3067 } 3068 /* ok we look clear to give out this port, so lets setup the binding */ 3069 if (bindall) { 3070 /* binding to all addresses, so just set in the proper flags */ 3071 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3072 /* set the automatic addr changes from kernel flag */ 3073 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3074 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3075 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3076 } else { 3077 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3078 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3079 } 3080 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3081 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3082 } else { 3083 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3084 } 3085 /* 3086 * set the automatic mobility_base from kernel flag (by 3087 * micchie) 3088 */ 3089 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3090 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3091 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3092 } else { 3093 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3094 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3095 } 3096 /* 3097 * set the automatic mobility_fasthandoff from kernel flag 3098 * (by micchie) 3099 */ 3100 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3101 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3102 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3103 } else { 3104 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3106 } 3107 } else { 3108 /* 3109 * bind specific, make sure flags is off and add a new 3110 * address structure to the sctp_addr_list inside the ep 3111 * structure. 3112 * 3113 * We will need to allocate one and insert it at the head. 3114 * The socketopt call can just insert new addresses in there 3115 * as well. It will also have to do the embed scope kame 3116 * hack too (before adding). 3117 */ 3118 struct sctp_ifa *ifa; 3119 union sctp_sockstore store; 3120 3121 memset(&store, 0, sizeof(store)); 3122 switch (addr->sa_family) { 3123 #ifdef INET 3124 case AF_INET: 3125 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3126 store.sin.sin_port = 0; 3127 break; 3128 #endif 3129 #ifdef INET6 3130 case AF_INET6: 3131 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3132 store.sin6.sin6_port = 0; 3133 break; 3134 #endif 3135 default: 3136 break; 3137 } 3138 /* 3139 * first find the interface with the bound address need to 3140 * zero out the port to find the address! yuck! can't do 3141 * this earlier since need port for sctp_pcb_findep() 3142 */ 3143 if (sctp_ifap != NULL) { 3144 ifa = sctp_ifap; 3145 } else { 3146 /* 3147 * Note for BSD we hit here always other O/S's will 3148 * pass things in via the sctp_ifap argument. 3149 */ 3150 ifa = sctp_find_ifa_by_addr(&store.sa, 3151 vrf_id, SCTP_ADDR_NOT_LOCKED); 3152 } 3153 if (ifa == NULL) { 3154 error = EADDRNOTAVAIL; 3155 /* Can't find an interface with that address */ 3156 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3157 goto out; 3158 } 3159 #ifdef INET6 3160 if (addr->sa_family == AF_INET6) { 3161 /* GAK, more FIXME IFA lock? */ 3162 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3163 /* Can't bind a non-existent addr. */ 3164 error = EINVAL; 3165 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3166 goto out; 3167 } 3168 } 3169 #endif 3170 /* we're not bound all */ 3171 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3172 /* allow bindx() to send ASCONF's for binding changes */ 3173 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3174 /* clear automatic addr changes from kernel flag */ 3175 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3176 3177 /* add this address to the endpoint list */ 3178 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3179 if (error != 0) 3180 goto out; 3181 inp->laddr_count++; 3182 } 3183 /* find the bucket */ 3184 if (port_reuse_active) { 3185 /* Put it into tcp 1-2-1 hash */ 3186 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3187 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3188 } else { 3189 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3190 } 3191 /* put it in the bucket */ 3192 LIST_INSERT_HEAD(head, inp, sctp_hash); 3193 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3194 (void *)head, ntohs(lport), port_reuse_active); 3195 /* set in the port */ 3196 inp->sctp_lport = lport; 3197 3198 /* turn off just the unbound flag */ 3199 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0, 3200 ("%s: inp %p is already bound", __func__, inp)); 3201 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3202 out: 3203 return (error); 3204 } 3205 3206 int 3207 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 3208 struct sctp_ifa *sctp_ifap, struct thread *td) 3209 { 3210 struct sctp_inpcb *inp; 3211 int error; 3212 3213 inp = so->so_pcb; 3214 SCTP_INP_INFO_WLOCK(); 3215 SCTP_INP_WLOCK(inp); 3216 error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td); 3217 SCTP_INP_WUNLOCK(inp); 3218 SCTP_INP_INFO_WUNLOCK(); 3219 return (error); 3220 } 3221 3222 static void 3223 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3224 { 3225 struct sctp_iterator *it, *nit; 3226 3227 /* 3228 * We enter with the only the ITERATOR_LOCK in place and a write 3229 * lock on the inp_info stuff. 3230 */ 3231 it = sctp_it_ctl.cur_it; 3232 if (it && (it->vn != curvnet)) { 3233 /* Its not looking at our VNET */ 3234 return; 3235 } 3236 if (it && (it->inp == inp)) { 3237 /* 3238 * This is tricky and we hold the iterator lock, but when it 3239 * returns and gets the lock (when we release it) the 3240 * iterator will try to operate on inp. We need to stop that 3241 * from happening. But of course the iterator has a 3242 * reference on the stcb and inp. We can mark it and it will 3243 * stop. 3244 * 3245 * If its a single iterator situation, we set the end 3246 * iterator flag. Otherwise we set the iterator to go to the 3247 * next inp. 3248 * 3249 */ 3250 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3251 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3252 } else { 3253 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3254 } 3255 } 3256 /* 3257 * Now go through and remove any single reference to our inp that 3258 * may be still pending on the list 3259 */ 3260 SCTP_IPI_ITERATOR_WQ_LOCK(); 3261 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3262 if (it->vn != curvnet) { 3263 continue; 3264 } 3265 if (it->inp == inp) { 3266 /* This one points to me is it inp specific? */ 3267 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3268 /* Remove and free this one */ 3269 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3270 it, sctp_nxt_itr); 3271 if (it->function_atend != NULL) { 3272 (*it->function_atend) (it->pointer, it->val); 3273 } 3274 SCTP_FREE(it, SCTP_M_ITER); 3275 } else { 3276 it->inp = LIST_NEXT(it->inp, sctp_list); 3277 if (it->inp) { 3278 SCTP_INP_INCR_REF(it->inp); 3279 } 3280 } 3281 /* 3282 * When its put in the refcnt is incremented so decr 3283 * it 3284 */ 3285 SCTP_INP_DECR_REF(inp); 3286 } 3287 } 3288 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3289 } 3290 3291 /* release sctp_inpcb unbind the port */ 3292 void 3293 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3294 { 3295 /* 3296 * Here we free a endpoint. We must find it (if it is in the Hash 3297 * table) and remove it from there. Then we must also find it in the 3298 * overall list and remove it from there. After all removals are 3299 * complete then any timer has to be stopped. Then start the actual 3300 * freeing. a) Any local lists. b) Any associations. c) The hash of 3301 * all associations. d) finally the ep itself. 3302 */ 3303 struct sctp_tcb *asoc, *nasoc; 3304 struct sctp_laddr *laddr, *nladdr; 3305 struct inpcb *ip_pcb; 3306 struct socket *so; 3307 int being_refed = 0; 3308 struct sctp_queued_to_read *sq, *nsq; 3309 int cnt; 3310 sctp_sharedkey_t *shared_key, *nshared_key; 3311 3312 #ifdef SCTP_LOG_CLOSING 3313 sctp_log_closing(inp, NULL, 0); 3314 #endif 3315 SCTP_ITERATOR_LOCK(); 3316 /* mark any iterators on the list or being processed */ 3317 sctp_iterator_inp_being_freed(inp); 3318 SCTP_ITERATOR_UNLOCK(); 3319 3320 SCTP_ASOC_CREATE_LOCK(inp); 3321 SCTP_INP_INFO_WLOCK(); 3322 SCTP_INP_WLOCK(inp); 3323 so = inp->sctp_socket; 3324 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0, 3325 ("%s: inp %p still has socket", __func__, inp)); 3326 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0, 3327 ("%s: double free of inp %p", __func__, inp)); 3328 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3329 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3330 /* socket is gone, so no more wakeups allowed */ 3331 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3332 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3333 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3334 } 3335 /* First time through we have the socket lock, after that no more. */ 3336 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3337 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3338 3339 if (inp->control) { 3340 sctp_m_freem(inp->control); 3341 inp->control = NULL; 3342 } 3343 if (inp->pkt) { 3344 sctp_m_freem(inp->pkt); 3345 inp->pkt = NULL; 3346 } 3347 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3348 * here but I will be nice :> (i.e. 3349 * ip_pcb = ep;) */ 3350 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3351 int cnt_in_sd; 3352 3353 cnt_in_sd = 0; 3354 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3355 SCTP_TCB_LOCK(asoc); 3356 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3357 asoc->sctp_socket = NULL; 3358 /* Skip guys being freed */ 3359 cnt_in_sd++; 3360 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3361 /* 3362 * Special case - we did not start a 3363 * kill timer on the asoc due to it 3364 * was not closed. So go ahead and 3365 * start it now. 3366 */ 3367 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3368 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3369 } 3370 SCTP_TCB_UNLOCK(asoc); 3371 continue; 3372 } 3373 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3374 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3375 (asoc->asoc.total_output_queue_size == 0)) { 3376 /* 3377 * If we have data in queue, we don't want 3378 * to just free since the app may have done, 3379 * send()/close or connect/send/close. And 3380 * it wants the data to get across first. 3381 */ 3382 /* Just abandon things in the front states */ 3383 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3384 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3385 cnt_in_sd++; 3386 } 3387 continue; 3388 } 3389 /* Disconnect the socket please */ 3390 asoc->sctp_socket = NULL; 3391 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3392 if ((asoc->asoc.size_on_reasm_queue > 0) || 3393 (asoc->asoc.control_pdapi) || 3394 (asoc->asoc.size_on_all_streams > 0) || 3395 (so && (so->so_rcv.sb_cc > 0))) { 3396 /* Left with Data unread */ 3397 struct mbuf *op_err; 3398 3399 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3400 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3401 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3402 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3403 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3404 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3405 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3406 } 3407 if (sctp_free_assoc(inp, asoc, 3408 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3409 cnt_in_sd++; 3410 } 3411 continue; 3412 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3413 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3414 (asoc->asoc.stream_queue_cnt == 0)) { 3415 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3416 goto abort_anyway; 3417 } 3418 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3419 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3420 struct sctp_nets *netp; 3421 3422 /* 3423 * there is nothing queued to send, 3424 * so I send shutdown 3425 */ 3426 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3427 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3428 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3429 } 3430 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3431 sctp_stop_timers_for_shutdown(asoc); 3432 if (asoc->asoc.alternate) { 3433 netp = asoc->asoc.alternate; 3434 } else { 3435 netp = asoc->asoc.primary_destination; 3436 } 3437 sctp_send_shutdown(asoc, netp); 3438 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3439 netp); 3440 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3441 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3442 } 3443 } else { 3444 /* mark into shutdown pending */ 3445 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3446 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3447 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3448 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3449 } 3450 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3451 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3452 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3453 struct mbuf *op_err; 3454 3455 abort_anyway: 3456 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3457 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3458 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3459 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3460 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3461 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3462 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3463 } 3464 if (sctp_free_assoc(inp, asoc, 3465 SCTP_PCBFREE_NOFORCE, 3466 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3467 cnt_in_sd++; 3468 } 3469 continue; 3470 } else { 3471 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3472 } 3473 } 3474 cnt_in_sd++; 3475 SCTP_TCB_UNLOCK(asoc); 3476 } 3477 /* now is there some left in our SHUTDOWN state? */ 3478 if (cnt_in_sd) { 3479 #ifdef SCTP_LOG_CLOSING 3480 sctp_log_closing(inp, NULL, 2); 3481 #endif 3482 inp->sctp_socket = NULL; 3483 SCTP_INP_WUNLOCK(inp); 3484 SCTP_ASOC_CREATE_UNLOCK(inp); 3485 SCTP_INP_INFO_WUNLOCK(); 3486 return; 3487 } 3488 } 3489 inp->sctp_socket = NULL; 3490 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3491 SCTP_PCB_FLAGS_UNBOUND) { 3492 /* 3493 * ok, this guy has been bound. It's port is somewhere in 3494 * the SCTP_BASE_INFO(hash table). Remove it! 3495 */ 3496 LIST_REMOVE(inp, sctp_hash); 3497 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3498 } 3499 3500 /* 3501 * If there is a timer running to kill us, forget it, since it may 3502 * have a contest on the INP lock.. which would cause us to die ... 3503 */ 3504 cnt = 0; 3505 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3506 SCTP_TCB_LOCK(asoc); 3507 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3508 /* Disconnect the socket please */ 3509 asoc->sctp_socket = NULL; 3510 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3511 } 3512 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3513 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3514 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3515 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3516 } 3517 cnt++; 3518 SCTP_TCB_UNLOCK(asoc); 3519 continue; 3520 } 3521 /* Free associations that are NOT killing us */ 3522 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3523 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3524 struct mbuf *op_err; 3525 3526 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3527 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3528 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3529 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3530 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3531 cnt++; 3532 SCTP_TCB_UNLOCK(asoc); 3533 continue; 3534 } 3535 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3536 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3537 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3538 } 3539 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3540 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3541 cnt++; 3542 } 3543 } 3544 if (cnt) { 3545 /* Ok we have someone out there that will kill us */ 3546 #ifdef SCTP_LOG_CLOSING 3547 sctp_log_closing(inp, NULL, 3); 3548 #endif 3549 SCTP_INP_WUNLOCK(inp); 3550 SCTP_ASOC_CREATE_UNLOCK(inp); 3551 SCTP_INP_INFO_WUNLOCK(); 3552 return; 3553 } 3554 if (SCTP_INP_LOCK_CONTENDED(inp)) 3555 being_refed++; 3556 if (SCTP_INP_READ_CONTENDED(inp)) 3557 being_refed++; 3558 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3559 being_refed++; 3560 /* NOTE: 0 refcount also means no timers are referencing us. */ 3561 if ((inp->refcount) || 3562 (being_refed) || 3563 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3564 #ifdef SCTP_LOG_CLOSING 3565 sctp_log_closing(inp, NULL, 4); 3566 #endif 3567 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3568 SCTP_INP_WUNLOCK(inp); 3569 SCTP_ASOC_CREATE_UNLOCK(inp); 3570 SCTP_INP_INFO_WUNLOCK(); 3571 return; 3572 } 3573 inp->sctp_ep.signature_change.type = 0; 3574 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3575 /* 3576 * Remove it from the list .. last thing we need a lock for. 3577 */ 3578 LIST_REMOVE(inp, sctp_list); 3579 SCTP_INP_WUNLOCK(inp); 3580 SCTP_ASOC_CREATE_UNLOCK(inp); 3581 SCTP_INP_INFO_WUNLOCK(); 3582 3583 #ifdef SCTP_LOG_CLOSING 3584 sctp_log_closing(inp, NULL, 5); 3585 #endif 3586 if ((inp->sctp_asocidhash) != NULL) { 3587 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3588 inp->sctp_asocidhash = NULL; 3589 } 3590 /* sa_ignore FREED_MEMORY */ 3591 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3592 /* Its only abandoned if it had data left */ 3593 if (sq->length) 3594 SCTP_STAT_INCR(sctps_left_abandon); 3595 3596 TAILQ_REMOVE(&inp->read_queue, sq, next); 3597 sctp_free_remote_addr(sq->whoFrom); 3598 if (so) 3599 so->so_rcv.sb_cc -= sq->length; 3600 if (sq->data) { 3601 sctp_m_freem(sq->data); 3602 sq->data = NULL; 3603 } 3604 /* 3605 * no need to free the net count, since at this point all 3606 * assoc's are gone. 3607 */ 3608 sctp_free_a_readq(NULL, sq); 3609 } 3610 /* Now the sctp_pcb things */ 3611 /* 3612 * free each asoc if it is not already closed/free. we can't use the 3613 * macro here since le_next will get freed as part of the 3614 * sctp_free_assoc() call. 3615 */ 3616 if (ip_pcb->inp_options) { 3617 (void)sctp_m_free(ip_pcb->inp_options); 3618 ip_pcb->inp_options = 0; 3619 } 3620 #ifdef INET6 3621 if (ip_pcb->inp_vflag & INP_IPV6) { 3622 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3623 } 3624 #endif /* INET6 */ 3625 ip_pcb->inp_vflag = 0; 3626 /* free up authentication fields */ 3627 if (inp->sctp_ep.local_auth_chunks != NULL) 3628 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3629 if (inp->sctp_ep.local_hmacs != NULL) 3630 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3631 3632 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3633 LIST_REMOVE(shared_key, next); 3634 sctp_free_sharedkey(shared_key); 3635 /* sa_ignore FREED_MEMORY */ 3636 } 3637 3638 /* 3639 * if we have an address list the following will free the list of 3640 * ifaddr's that are set into this ep. Again macro limitations here, 3641 * since the LIST_FOREACH could be a bad idea. 3642 */ 3643 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3644 sctp_remove_laddr(laddr); 3645 } 3646 3647 #ifdef SCTP_TRACK_FREED_ASOCS 3648 /* TEMP CODE */ 3649 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3650 LIST_REMOVE(asoc, sctp_tcblist); 3651 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3652 SCTP_DECR_ASOC_COUNT(); 3653 } 3654 /* *** END TEMP CODE *** */ 3655 #endif 3656 /* Now lets see about freeing the EP hash table. */ 3657 if (inp->sctp_tcbhash != NULL) { 3658 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3659 inp->sctp_tcbhash = NULL; 3660 } 3661 /* Now we must put the ep memory back into the zone pool */ 3662 crfree(inp->ip_inp.inp.inp_cred); 3663 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3664 SCTP_INP_LOCK_DESTROY(inp); 3665 SCTP_INP_READ_DESTROY(inp); 3666 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3667 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3668 SCTP_DECR_EP_COUNT(); 3669 } 3670 3671 struct sctp_nets * 3672 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3673 { 3674 struct sctp_nets *net; 3675 3676 /* locate the address */ 3677 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3678 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3679 return (net); 3680 } 3681 return (NULL); 3682 } 3683 3684 int 3685 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3686 { 3687 struct sctp_ifa *sctp_ifa; 3688 3689 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3690 if (sctp_ifa) { 3691 return (1); 3692 } else { 3693 return (0); 3694 } 3695 } 3696 3697 /* 3698 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3699 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3700 * stats of stuff. 3701 */ 3702 int 3703 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3704 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3705 { 3706 /* 3707 * The following is redundant to the same lines in the 3708 * sctp_aloc_assoc() but is needed since others call the add address 3709 * function 3710 */ 3711 struct sctp_nets *net, *netfirst; 3712 int addr_inscope; 3713 3714 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3715 from); 3716 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3717 3718 netfirst = sctp_findnet(stcb, newaddr); 3719 if (netfirst) { 3720 /* 3721 * Lie and return ok, we don't want to make the association 3722 * go away for this behavior. It will happen in the TCP 3723 * model in a connected socket. It does not reach the hash 3724 * table until after the association is built so it can't be 3725 * found. Mark as reachable, since the initial creation will 3726 * have been cleared and the NOT_IN_ASSOC flag will have 3727 * been added... and we don't want to end up removing it 3728 * back out. 3729 */ 3730 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3731 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3732 SCTP_ADDR_UNCONFIRMED); 3733 } else { 3734 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3735 } 3736 3737 return (0); 3738 } 3739 addr_inscope = 1; 3740 switch (newaddr->sa_family) { 3741 #ifdef INET 3742 case AF_INET: 3743 { 3744 struct sockaddr_in *sin; 3745 3746 sin = (struct sockaddr_in *)newaddr; 3747 if (sin->sin_addr.s_addr == 0) { 3748 /* Invalid address */ 3749 return (-1); 3750 } 3751 /* zero out the zero area */ 3752 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3753 3754 /* assure len is set */ 3755 sin->sin_len = sizeof(struct sockaddr_in); 3756 if (set_scope) { 3757 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3758 stcb->asoc.scope.ipv4_local_scope = 1; 3759 } 3760 } else { 3761 /* Validate the address is in scope */ 3762 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3763 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3764 addr_inscope = 0; 3765 } 3766 } 3767 break; 3768 } 3769 #endif 3770 #ifdef INET6 3771 case AF_INET6: 3772 { 3773 struct sockaddr_in6 *sin6; 3774 3775 sin6 = (struct sockaddr_in6 *)newaddr; 3776 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3777 /* Invalid address */ 3778 return (-1); 3779 } 3780 /* assure len is set */ 3781 sin6->sin6_len = sizeof(struct sockaddr_in6); 3782 if (set_scope) { 3783 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3784 stcb->asoc.scope.loopback_scope = 1; 3785 stcb->asoc.scope.local_scope = 0; 3786 stcb->asoc.scope.ipv4_local_scope = 1; 3787 stcb->asoc.scope.site_scope = 1; 3788 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3789 /* 3790 * If the new destination is a 3791 * LINK_LOCAL we must have common 3792 * site scope. Don't set the local 3793 * scope since we may not share all 3794 * links, only loopback can do this. 3795 * Links on the local network would 3796 * also be on our private network 3797 * for v4 too. 3798 */ 3799 stcb->asoc.scope.ipv4_local_scope = 1; 3800 stcb->asoc.scope.site_scope = 1; 3801 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3802 /* 3803 * If the new destination is 3804 * SITE_LOCAL then we must have site 3805 * scope in common. 3806 */ 3807 stcb->asoc.scope.site_scope = 1; 3808 } 3809 } else { 3810 /* Validate the address is in scope */ 3811 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3812 (stcb->asoc.scope.loopback_scope == 0)) { 3813 addr_inscope = 0; 3814 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3815 (stcb->asoc.scope.local_scope == 0)) { 3816 addr_inscope = 0; 3817 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3818 (stcb->asoc.scope.site_scope == 0)) { 3819 addr_inscope = 0; 3820 } 3821 } 3822 break; 3823 } 3824 #endif 3825 default: 3826 /* not supported family type */ 3827 return (-1); 3828 } 3829 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3830 if (net == NULL) { 3831 return (-1); 3832 } 3833 SCTP_INCR_RADDR_COUNT(); 3834 memset(net, 0, sizeof(struct sctp_nets)); 3835 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3836 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3837 switch (newaddr->sa_family) { 3838 #ifdef INET 3839 case AF_INET: 3840 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3841 break; 3842 #endif 3843 #ifdef INET6 3844 case AF_INET6: 3845 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3846 break; 3847 #endif 3848 default: 3849 break; 3850 } 3851 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3852 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3853 stcb->asoc.scope.loopback_scope = 1; 3854 stcb->asoc.scope.ipv4_local_scope = 1; 3855 stcb->asoc.scope.local_scope = 0; 3856 stcb->asoc.scope.site_scope = 1; 3857 addr_inscope = 1; 3858 } 3859 net->failure_threshold = stcb->asoc.def_net_failure; 3860 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3861 if (addr_inscope == 0) { 3862 net->dest_state = (SCTP_ADDR_REACHABLE | 3863 SCTP_ADDR_OUT_OF_SCOPE); 3864 } else { 3865 if (from == SCTP_ADDR_IS_CONFIRMED) 3866 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3867 net->dest_state = SCTP_ADDR_REACHABLE; 3868 else 3869 net->dest_state = SCTP_ADDR_REACHABLE | 3870 SCTP_ADDR_UNCONFIRMED; 3871 } 3872 /* 3873 * We set this to 0, the timer code knows that this means its an 3874 * initial value 3875 */ 3876 net->rto_needed = 1; 3877 net->RTO = 0; 3878 net->RTO_measured = 0; 3879 stcb->asoc.numnets++; 3880 net->ref_count = 1; 3881 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3882 net->port = port; 3883 net->dscp = stcb->asoc.default_dscp; 3884 #ifdef INET6 3885 net->flowlabel = stcb->asoc.default_flowlabel; 3886 #endif 3887 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3888 net->dest_state |= SCTP_ADDR_NOHB; 3889 } else { 3890 net->dest_state &= ~SCTP_ADDR_NOHB; 3891 } 3892 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3893 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3894 } else { 3895 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3896 } 3897 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3898 /* Init the timer structure */ 3899 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3900 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3901 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3902 3903 /* Now generate a route for this guy */ 3904 #ifdef INET6 3905 /* KAME hack: embed scopeid */ 3906 if (newaddr->sa_family == AF_INET6) { 3907 struct sockaddr_in6 *sin6; 3908 3909 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3910 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3911 sin6->sin6_scope_id = 0; 3912 } 3913 #endif 3914 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3915 stcb->asoc.vrf_id, 3916 stcb->sctp_ep->fibnum); 3917 3918 net->src_addr_selected = 0; 3919 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3920 /* Get source address */ 3921 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3922 stcb, 3923 (sctp_route_t *)&net->ro, 3924 net, 3925 0, 3926 stcb->asoc.vrf_id); 3927 if (stcb->asoc.default_mtu > 0) { 3928 net->mtu = stcb->asoc.default_mtu; 3929 switch (net->ro._l_addr.sa.sa_family) { 3930 #ifdef INET 3931 case AF_INET: 3932 net->mtu += SCTP_MIN_V4_OVERHEAD; 3933 break; 3934 #endif 3935 #ifdef INET6 3936 case AF_INET6: 3937 net->mtu += SCTP_MIN_OVERHEAD; 3938 break; 3939 #endif 3940 default: 3941 break; 3942 } 3943 #if defined(INET) || defined(INET6) 3944 if (net->port) { 3945 net->mtu += (uint32_t)sizeof(struct udphdr); 3946 } 3947 #endif 3948 } else if (net->ro._s_addr != NULL) { 3949 uint32_t imtu, rmtu, hcmtu; 3950 3951 net->src_addr_selected = 1; 3952 /* Now get the interface MTU */ 3953 if (net->ro._s_addr->ifn_p != NULL) { 3954 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3955 } else { 3956 imtu = 0; 3957 } 3958 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 3959 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3960 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3961 } 3962 } 3963 if (net->mtu == 0) { 3964 if (stcb->asoc.default_mtu > 0) { 3965 net->mtu = stcb->asoc.default_mtu; 3966 switch (net->ro._l_addr.sa.sa_family) { 3967 #ifdef INET 3968 case AF_INET: 3969 net->mtu += SCTP_MIN_V4_OVERHEAD; 3970 break; 3971 #endif 3972 #ifdef INET6 3973 case AF_INET6: 3974 net->mtu += SCTP_MIN_OVERHEAD; 3975 break; 3976 #endif 3977 default: 3978 break; 3979 } 3980 #if defined(INET) || defined(INET6) 3981 if (net->port) { 3982 net->mtu += (uint32_t)sizeof(struct udphdr); 3983 } 3984 #endif 3985 } else { 3986 switch (newaddr->sa_family) { 3987 #ifdef INET 3988 case AF_INET: 3989 net->mtu = SCTP_DEFAULT_MTU; 3990 break; 3991 #endif 3992 #ifdef INET6 3993 case AF_INET6: 3994 net->mtu = 1280; 3995 break; 3996 #endif 3997 default: 3998 break; 3999 } 4000 } 4001 } 4002 #if defined(INET) || defined(INET6) 4003 if (net->port) { 4004 net->mtu -= (uint32_t)sizeof(struct udphdr); 4005 } 4006 #endif 4007 if (from == SCTP_ALLOC_ASOC) { 4008 stcb->asoc.smallest_mtu = net->mtu; 4009 } 4010 if (stcb->asoc.smallest_mtu > net->mtu) { 4011 sctp_pathmtu_adjustment(stcb, net->mtu); 4012 } 4013 #ifdef INET6 4014 if (newaddr->sa_family == AF_INET6) { 4015 struct sockaddr_in6 *sin6; 4016 4017 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4018 (void)sa6_recoverscope(sin6); 4019 } 4020 #endif 4021 4022 /* JRS - Use the congestion control given in the CC module */ 4023 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4024 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4025 4026 /* 4027 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4028 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4029 */ 4030 net->find_pseudo_cumack = 1; 4031 net->find_rtx_pseudo_cumack = 1; 4032 /* Choose an initial flowid. */ 4033 net->flowid = stcb->asoc.my_vtag ^ 4034 ntohs(stcb->rport) ^ 4035 ntohs(stcb->sctp_ep->sctp_lport); 4036 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4037 if (netp) { 4038 *netp = net; 4039 } 4040 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4041 if (net->ro.ro_nh == NULL) { 4042 /* Since we have no route put it at the back */ 4043 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4044 } else if (netfirst == NULL) { 4045 /* We are the first one in the pool. */ 4046 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4047 } else if (netfirst->ro.ro_nh == NULL) { 4048 /* 4049 * First one has NO route. Place this one ahead of the first 4050 * one. 4051 */ 4052 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4053 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4054 /* 4055 * This one has a different interface than the one at the 4056 * top of the list. Place it ahead. 4057 */ 4058 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4059 } else { 4060 /* 4061 * Ok we have the same interface as the first one. Move 4062 * forward until we find either a) one with a NULL route... 4063 * insert ahead of that b) one with a different ifp.. insert 4064 * after that. c) end of the list.. insert at the tail. 4065 */ 4066 struct sctp_nets *netlook; 4067 4068 do { 4069 netlook = TAILQ_NEXT(netfirst, sctp_next); 4070 if (netlook == NULL) { 4071 /* End of the list */ 4072 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4073 break; 4074 } else if (netlook->ro.ro_nh == NULL) { 4075 /* next one has NO route */ 4076 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4077 break; 4078 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4079 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4080 net, sctp_next); 4081 break; 4082 } 4083 /* Shift forward */ 4084 netfirst = netlook; 4085 } while (netlook != NULL); 4086 } 4087 4088 /* got to have a primary set */ 4089 if (stcb->asoc.primary_destination == 0) { 4090 stcb->asoc.primary_destination = net; 4091 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4092 (net->ro.ro_nh) && 4093 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4094 /* No route to current primary adopt new primary */ 4095 stcb->asoc.primary_destination = net; 4096 } 4097 /* Validate primary is first */ 4098 net = TAILQ_FIRST(&stcb->asoc.nets); 4099 if ((net != stcb->asoc.primary_destination) && 4100 (stcb->asoc.primary_destination)) { 4101 /* 4102 * first one on the list is NOT the primary sctp_cmpaddr() 4103 * is much more efficient if the primary is the first on the 4104 * list, make it so. 4105 */ 4106 TAILQ_REMOVE(&stcb->asoc.nets, 4107 stcb->asoc.primary_destination, sctp_next); 4108 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4109 stcb->asoc.primary_destination, sctp_next); 4110 } 4111 return (0); 4112 } 4113 4114 static uint32_t 4115 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4116 { 4117 uint32_t id; 4118 struct sctpasochead *head; 4119 struct sctp_tcb *lstcb; 4120 4121 try_again: 4122 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4123 /* TSNH */ 4124 return (0); 4125 } 4126 /* 4127 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4128 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4129 */ 4130 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4131 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4132 } 4133 id = inp->sctp_associd_counter; 4134 inp->sctp_associd_counter++; 4135 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4136 if (lstcb) { 4137 goto try_again; 4138 } 4139 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4140 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4141 stcb->asoc.in_asocid_hash = 1; 4142 return (id); 4143 } 4144 4145 /* 4146 * allocate an association and add it to the endpoint. The caller must be 4147 * careful to add all additional addresses once they are know right away or 4148 * else the assoc will be may experience a blackout scenario. 4149 */ 4150 static struct sctp_tcb * 4151 sctp_aloc_assoc_locked(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4152 int *error, uint32_t override_tag, uint32_t initial_tsn, 4153 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4154 struct thread *p, 4155 int initialize_auth_params) 4156 { 4157 /* note the p argument is only valid in unbound sockets */ 4158 4159 struct sctp_tcb *stcb; 4160 struct sctp_association *asoc; 4161 struct sctpasochead *head; 4162 uint16_t rport; 4163 int err; 4164 4165 SCTP_INP_INFO_WLOCK_ASSERT(); 4166 SCTP_INP_WLOCK_ASSERT(inp); 4167 4168 /* 4169 * Assumption made here: Caller has done a 4170 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4171 * address does not exist already. 4172 */ 4173 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4174 /* Hit max assoc, sorry no more */ 4175 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4176 *error = ENOBUFS; 4177 return (NULL); 4178 } 4179 if (firstaddr == NULL) { 4180 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4181 *error = EINVAL; 4182 return (NULL); 4183 } 4184 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4185 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4186 *error = EINVAL; 4187 return (NULL); 4188 } 4189 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4190 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4191 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4192 /* 4193 * If its in the TCP pool, its NOT allowed to create an 4194 * association. The parent listener needs to call 4195 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4196 * off, or connected one does this.. its an error. 4197 */ 4198 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4199 *error = EINVAL; 4200 return (NULL); 4201 } 4202 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4203 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4204 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4205 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4206 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4207 *error = EINVAL; 4208 return (NULL); 4209 } 4210 } 4211 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4212 #ifdef SCTP_DEBUG 4213 if (firstaddr) { 4214 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4215 switch (firstaddr->sa_family) { 4216 #ifdef INET 4217 case AF_INET: 4218 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4219 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4220 break; 4221 #endif 4222 #ifdef INET6 4223 case AF_INET6: 4224 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4225 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4226 break; 4227 #endif 4228 default: 4229 break; 4230 } 4231 } else { 4232 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4233 } 4234 #endif /* SCTP_DEBUG */ 4235 switch (firstaddr->sa_family) { 4236 #ifdef INET 4237 case AF_INET: 4238 { 4239 struct sockaddr_in *sin; 4240 4241 sin = (struct sockaddr_in *)firstaddr; 4242 if ((ntohs(sin->sin_port) == 0) || 4243 (sin->sin_addr.s_addr == INADDR_ANY) || 4244 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4245 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) || 4246 (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) != 0) && 4247 (SCTP_IPV6_V6ONLY(inp) != 0))) { 4248 /* Invalid address */ 4249 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4250 *error = EINVAL; 4251 return (NULL); 4252 } 4253 rport = sin->sin_port; 4254 break; 4255 } 4256 #endif 4257 #ifdef INET6 4258 case AF_INET6: 4259 { 4260 struct sockaddr_in6 *sin6; 4261 4262 sin6 = (struct sockaddr_in6 *)firstaddr; 4263 if ((ntohs(sin6->sin6_port) == 0) || 4264 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4265 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) || 4266 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) { 4267 /* Invalid address */ 4268 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4269 *error = EINVAL; 4270 return (NULL); 4271 } 4272 rport = sin6->sin6_port; 4273 break; 4274 } 4275 #endif 4276 default: 4277 /* not supported family type */ 4278 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4279 *error = EINVAL; 4280 return (NULL); 4281 } 4282 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4283 /* 4284 * If you have not performed a bind, then we need to do the 4285 * ephemeral bind for you. 4286 */ 4287 if ((err = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) { 4288 /* bind error, probably perm */ 4289 *error = err; 4290 return (NULL); 4291 } 4292 } 4293 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4294 if (stcb == NULL) { 4295 /* out of memory? */ 4296 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4297 *error = ENOMEM; 4298 return (NULL); 4299 } 4300 SCTP_INCR_ASOC_COUNT(); 4301 4302 memset(stcb, 0, sizeof(*stcb)); 4303 asoc = &stcb->asoc; 4304 4305 SCTP_TCB_LOCK_INIT(stcb); 4306 SCTP_TCB_SEND_LOCK_INIT(stcb); 4307 stcb->rport = rport; 4308 /* setup back pointer's */ 4309 stcb->sctp_ep = inp; 4310 stcb->sctp_socket = inp->sctp_socket; 4311 if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) { 4312 /* failed */ 4313 SCTP_TCB_LOCK_DESTROY(stcb); 4314 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4315 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4316 SCTP_DECR_ASOC_COUNT(); 4317 *error = err; 4318 return (NULL); 4319 } 4320 SCTP_TCB_LOCK(stcb); 4321 4322 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4323 /* now that my_vtag is set, add it to the hash */ 4324 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4325 /* put it in the bucket in the vtag hash of assoc's for the system */ 4326 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4327 4328 if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) { 4329 /* failure.. memory error? */ 4330 if (asoc->strmout) { 4331 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4332 asoc->strmout = NULL; 4333 } 4334 if (asoc->mapping_array) { 4335 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4336 asoc->mapping_array = NULL; 4337 } 4338 if (asoc->nr_mapping_array) { 4339 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4340 asoc->nr_mapping_array = NULL; 4341 } 4342 SCTP_DECR_ASOC_COUNT(); 4343 SCTP_TCB_UNLOCK(stcb); 4344 SCTP_TCB_LOCK_DESTROY(stcb); 4345 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4346 LIST_REMOVE(stcb, sctp_asocs); 4347 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4348 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4349 SCTP_INP_WUNLOCK(inp); 4350 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4351 *error = ENOBUFS; 4352 return (NULL); 4353 } 4354 /* Init all the timers */ 4355 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4356 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4357 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4358 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4359 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4360 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4361 4362 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4363 /* now file the port under the hash as well */ 4364 if (inp->sctp_tcbhash != NULL) { 4365 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4366 inp->sctp_hashmark)]; 4367 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4368 } 4369 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4370 sctp_initialize_auth_params(inp, stcb); 4371 } 4372 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4373 return (stcb); 4374 } 4375 4376 struct sctp_tcb * 4377 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4378 int *error, uint32_t override_tag, uint32_t initial_tsn, 4379 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4380 struct thread *p, 4381 int initialize_auth_params) 4382 { 4383 struct sctp_tcb *stcb; 4384 4385 SCTP_INP_INFO_WLOCK(); 4386 SCTP_INP_WLOCK(inp); 4387 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4388 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4389 SCTP_INP_INFO_WUNLOCK(); 4390 SCTP_INP_WUNLOCK(inp); 4391 return (stcb); 4392 } 4393 4394 struct sctp_tcb * 4395 sctp_aloc_assoc_connected(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4396 int *error, uint32_t override_tag, uint32_t initial_tsn, 4397 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4398 struct thread *p, 4399 int initialize_auth_params) 4400 { 4401 struct sctp_tcb *stcb; 4402 4403 SCTP_INP_INFO_WLOCK(); 4404 SCTP_INP_WLOCK(inp); 4405 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 4406 SCTP_IS_LISTENING(inp)) { 4407 SCTP_INP_INFO_WUNLOCK(); 4408 SCTP_INP_WUNLOCK(inp); 4409 *error = EINVAL; 4410 return (NULL); 4411 } 4412 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4413 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4414 SCTP_INP_INFO_WUNLOCK(); 4415 if (stcb != NULL && (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4416 inp->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 4417 soisconnecting(inp->sctp_socket); 4418 } 4419 SCTP_INP_WUNLOCK(inp); 4420 return (stcb); 4421 } 4422 4423 void 4424 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4425 { 4426 struct sctp_inpcb *inp; 4427 struct sctp_association *asoc; 4428 4429 inp = stcb->sctp_ep; 4430 asoc = &stcb->asoc; 4431 asoc->numnets--; 4432 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4433 if (net == asoc->primary_destination) { 4434 /* Reset primary */ 4435 struct sctp_nets *lnet; 4436 4437 lnet = TAILQ_FIRST(&asoc->nets); 4438 /* 4439 * Mobility adaptation Ideally, if deleted destination is 4440 * the primary, it becomes a fast retransmission trigger by 4441 * the subsequent SET PRIMARY. (by micchie) 4442 */ 4443 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4444 SCTP_MOBILITY_BASE) || 4445 sctp_is_mobility_feature_on(stcb->sctp_ep, 4446 SCTP_MOBILITY_FASTHANDOFF)) { 4447 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4448 if (asoc->deleted_primary != NULL) { 4449 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4450 goto out; 4451 } 4452 asoc->deleted_primary = net; 4453 atomic_add_int(&net->ref_count, 1); 4454 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4455 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4456 sctp_mobility_feature_on(stcb->sctp_ep, 4457 SCTP_MOBILITY_PRIM_DELETED); 4458 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4459 stcb->sctp_ep, stcb, NULL); 4460 } 4461 out: 4462 /* Try to find a confirmed primary */ 4463 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4464 } 4465 if (net == asoc->last_data_chunk_from) { 4466 /* Reset primary */ 4467 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4468 } 4469 if (net == asoc->last_control_chunk_from) { 4470 /* Clear net */ 4471 asoc->last_control_chunk_from = NULL; 4472 } 4473 if (net == asoc->last_net_cmt_send_started) { 4474 /* Clear net */ 4475 asoc->last_net_cmt_send_started = NULL; 4476 } 4477 if (net == stcb->asoc.alternate) { 4478 sctp_free_remote_addr(stcb->asoc.alternate); 4479 stcb->asoc.alternate = NULL; 4480 } 4481 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4482 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4483 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4484 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4485 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4486 sctp_free_remote_addr(net); 4487 } 4488 4489 /* 4490 * remove a remote endpoint address from an association, it will fail if the 4491 * address does not exist. 4492 */ 4493 int 4494 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4495 { 4496 /* 4497 * Here we need to remove a remote address. This is quite simple, we 4498 * first find it in the list of address for the association 4499 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4500 * on that item. Note we do not allow it to be removed if there are 4501 * no other addresses. 4502 */ 4503 struct sctp_association *asoc; 4504 struct sctp_nets *net, *nnet; 4505 4506 asoc = &stcb->asoc; 4507 4508 /* locate the address */ 4509 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4510 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4511 continue; 4512 } 4513 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4514 remaddr)) { 4515 /* we found the guy */ 4516 if (asoc->numnets < 2) { 4517 /* Must have at LEAST two remote addresses */ 4518 return (-1); 4519 } else { 4520 sctp_remove_net(stcb, net); 4521 return (0); 4522 } 4523 } 4524 } 4525 /* not found. */ 4526 return (-2); 4527 } 4528 4529 static bool 4530 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport, uint32_t now) 4531 { 4532 struct sctpvtaghead *chain; 4533 struct sctp_tagblock *twait_block; 4534 int i; 4535 4536 SCTP_INP_INFO_LOCK_ASSERT(); 4537 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4538 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4539 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4540 if ((twait_block->vtag_block[i].tv_sec_at_expire >= now) && 4541 (twait_block->vtag_block[i].v_tag == tag) && 4542 (twait_block->vtag_block[i].lport == lport) && 4543 (twait_block->vtag_block[i].rport == rport)) { 4544 return (true); 4545 } 4546 } 4547 } 4548 return (false); 4549 } 4550 4551 static void 4552 sctp_set_vtag_block(struct sctp_timewait *vtag_block, uint32_t time, 4553 uint32_t tag, uint16_t lport, uint16_t rport) 4554 { 4555 vtag_block->tv_sec_at_expire = time; 4556 vtag_block->v_tag = tag; 4557 vtag_block->lport = lport; 4558 vtag_block->rport = rport; 4559 } 4560 4561 static void 4562 sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4563 { 4564 struct sctpvtaghead *chain; 4565 struct sctp_tagblock *twait_block; 4566 struct timeval now; 4567 uint32_t time; 4568 int i; 4569 bool set; 4570 4571 SCTP_INP_INFO_WLOCK_ASSERT(); 4572 (void)SCTP_GETTIME_TIMEVAL(&now); 4573 time = (uint32_t)now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait); 4574 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4575 set = false; 4576 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4577 /* Block(s) present, lets find space, and expire on the fly */ 4578 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4579 if ((twait_block->vtag_block[i].v_tag == 0) && !set) { 4580 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4581 set = true; 4582 continue; 4583 } 4584 if ((twait_block->vtag_block[i].v_tag != 0) && 4585 (twait_block->vtag_block[i].tv_sec_at_expire < (uint32_t)now.tv_sec)) { 4586 if (set) { 4587 /* Audit expires this guy */ 4588 sctp_set_vtag_block(twait_block->vtag_block + i, 0, 0, 0, 0); 4589 } else { 4590 /* Reuse it for the new tag */ 4591 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4592 set = true; 4593 } 4594 } 4595 } 4596 if (set) { 4597 /* 4598 * We only do up to the block where we can place our 4599 * tag for audits 4600 */ 4601 break; 4602 } 4603 } 4604 /* Need to add a new block to chain */ 4605 if (!set) { 4606 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4607 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4608 if (twait_block == NULL) { 4609 return; 4610 } 4611 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4612 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4613 sctp_set_vtag_block(twait_block->vtag_block, time, tag, lport, rport); 4614 } 4615 } 4616 4617 void 4618 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4619 { 4620 struct sctp_tmit_chunk *chk, *nchk; 4621 struct sctp_queued_to_read *control, *ncontrol; 4622 4623 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4624 TAILQ_REMOVE(rh, control, next_instrm); 4625 control->on_strm_q = 0; 4626 if (control->on_read_q == 0) { 4627 sctp_free_remote_addr(control->whoFrom); 4628 if (control->data) { 4629 sctp_m_freem(control->data); 4630 control->data = NULL; 4631 } 4632 } 4633 /* Reassembly free? */ 4634 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4635 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4636 if (chk->data) { 4637 sctp_m_freem(chk->data); 4638 chk->data = NULL; 4639 } 4640 if (chk->holds_key_ref) 4641 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4642 sctp_free_remote_addr(chk->whoTo); 4643 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4644 SCTP_DECR_CHK_COUNT(); 4645 /* sa_ignore FREED_MEMORY */ 4646 } 4647 /* 4648 * We don't free the address here since all the net's were 4649 * freed above. 4650 */ 4651 if (control->on_read_q == 0) { 4652 sctp_free_a_readq(stcb, control); 4653 } 4654 } 4655 } 4656 4657 /*- 4658 * Free the association after un-hashing the remote port. This 4659 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4660 * expect that the input to this function IS a locked TCB. 4661 * It will return 0, if it did NOT destroy the association (instead 4662 * it unlocks it. It will return NON-zero if it either destroyed the 4663 * association OR the association is already destroyed. 4664 */ 4665 int 4666 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4667 { 4668 int i; 4669 struct sctp_association *asoc; 4670 struct sctp_nets *net, *nnet; 4671 struct sctp_laddr *laddr, *naddr; 4672 struct sctp_tmit_chunk *chk, *nchk; 4673 struct sctp_asconf_addr *aparam, *naparam; 4674 struct sctp_asconf_ack *aack, *naack; 4675 struct sctp_stream_reset_list *strrst, *nstrrst; 4676 struct sctp_queued_to_read *sq, *nsq; 4677 struct sctp_stream_queue_pending *sp, *nsp; 4678 sctp_sharedkey_t *shared_key, *nshared_key; 4679 struct socket *so; 4680 4681 /* first, lets purge the entry from the hash table. */ 4682 4683 #ifdef SCTP_LOG_CLOSING 4684 sctp_log_closing(inp, stcb, 6); 4685 #endif 4686 if (stcb->asoc.state == 0) { 4687 #ifdef SCTP_LOG_CLOSING 4688 sctp_log_closing(inp, NULL, 7); 4689 #endif 4690 /* there is no asoc, really TSNH :-0 */ 4691 return (1); 4692 } 4693 SCTP_TCB_SEND_LOCK(stcb); 4694 if (stcb->asoc.alternate) { 4695 sctp_free_remote_addr(stcb->asoc.alternate); 4696 stcb->asoc.alternate = NULL; 4697 } 4698 /* TEMP CODE */ 4699 if (stcb->freed_from_where == 0) { 4700 /* Only record the first place free happened from */ 4701 stcb->freed_from_where = from_location; 4702 } 4703 /* TEMP CODE */ 4704 4705 asoc = &stcb->asoc; 4706 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4707 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4708 /* nothing around */ 4709 so = NULL; 4710 else 4711 so = inp->sctp_socket; 4712 4713 /* 4714 * We used timer based freeing if a reader or writer is in the way. 4715 * So we first check if we are actually being called from a timer, 4716 * if so we abort early if a reader or writer is still in the way. 4717 */ 4718 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4719 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4720 /* 4721 * is it the timer driving us? if so are the reader/writers 4722 * gone? 4723 */ 4724 if (stcb->asoc.refcnt) { 4725 /* nope, reader or writer in the way */ 4726 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4727 /* no asoc destroyed */ 4728 SCTP_TCB_SEND_UNLOCK(stcb); 4729 SCTP_TCB_UNLOCK(stcb); 4730 #ifdef SCTP_LOG_CLOSING 4731 sctp_log_closing(inp, stcb, 8); 4732 #endif 4733 return (0); 4734 } 4735 } 4736 /* Now clean up any other timers */ 4737 sctp_stop_association_timers(stcb, false); 4738 /* Now the read queue needs to be cleaned up (only once) */ 4739 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4740 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4741 SCTP_INP_READ_LOCK(inp); 4742 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4743 if (sq->stcb == stcb) { 4744 sq->do_not_ref_stcb = 1; 4745 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4746 /* 4747 * If there is no end, there never will be 4748 * now. 4749 */ 4750 if (sq->end_added == 0) { 4751 /* Held for PD-API clear that. */ 4752 sq->pdapi_aborted = 1; 4753 sq->held_length = 0; 4754 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4755 /* 4756 * Need to add a PD-API 4757 * aborted indication. 4758 * Setting the control_pdapi 4759 * assures that it will be 4760 * added right after this 4761 * msg. 4762 */ 4763 uint32_t strseq; 4764 4765 stcb->asoc.control_pdapi = sq; 4766 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4767 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4768 stcb, 4769 SCTP_PARTIAL_DELIVERY_ABORTED, 4770 (void *)&strseq, 4771 SCTP_SO_LOCKED); 4772 stcb->asoc.control_pdapi = NULL; 4773 } 4774 } 4775 /* Add an end to wake them */ 4776 sq->end_added = 1; 4777 } 4778 } 4779 SCTP_INP_READ_UNLOCK(inp); 4780 if (stcb->block_entry) { 4781 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4782 stcb->block_entry->error = ECONNRESET; 4783 stcb->block_entry = NULL; 4784 } 4785 } 4786 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4787 /* 4788 * Someone holds a reference OR the socket is unaccepted 4789 * yet. 4790 */ 4791 if ((stcb->asoc.refcnt) || 4792 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4793 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4794 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4795 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4796 } 4797 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4798 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4799 /* nothing around */ 4800 so = NULL; 4801 if (so) { 4802 /* Wake any reader/writers */ 4803 sctp_sorwakeup(inp, so); 4804 sctp_sowwakeup(inp, so); 4805 } 4806 SCTP_TCB_SEND_UNLOCK(stcb); 4807 SCTP_TCB_UNLOCK(stcb); 4808 4809 #ifdef SCTP_LOG_CLOSING 4810 sctp_log_closing(inp, stcb, 9); 4811 #endif 4812 /* no asoc destroyed */ 4813 return (0); 4814 } 4815 #ifdef SCTP_LOG_CLOSING 4816 sctp_log_closing(inp, stcb, 10); 4817 #endif 4818 /* 4819 * When I reach here, no others want to kill the assoc yet.. and I 4820 * own the lock. Now its possible an abort comes in when I do the 4821 * lock exchange below to grab all the locks to do the final take 4822 * out. to prevent this we increment the count, which will start a 4823 * timer and blow out above thus assuring us that we hold exclusive 4824 * killing of the asoc. Note that after getting back the TCB lock we 4825 * will go ahead and increment the counter back up and stop any 4826 * timer a passing stranger may have started :-S 4827 */ 4828 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4829 atomic_add_int(&stcb->asoc.refcnt, 1); 4830 4831 SCTP_TCB_SEND_UNLOCK(stcb); 4832 SCTP_TCB_UNLOCK(stcb); 4833 SCTP_INP_INFO_WLOCK(); 4834 SCTP_INP_WLOCK(inp); 4835 SCTP_TCB_LOCK(stcb); 4836 SCTP_TCB_SEND_LOCK(stcb); 4837 } 4838 /* Double check the GONE flag */ 4839 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4840 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4841 /* nothing around */ 4842 so = NULL; 4843 4844 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4845 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4846 /* 4847 * For TCP type we need special handling when we are 4848 * connected. We also include the peel'ed off ones to. 4849 */ 4850 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4851 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4852 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4853 if (so) { 4854 SOCKBUF_LOCK(&so->so_rcv); 4855 so->so_state &= ~(SS_ISCONNECTING | 4856 SS_ISDISCONNECTING | 4857 SS_ISCONFIRMING | 4858 SS_ISCONNECTED); 4859 so->so_state |= SS_ISDISCONNECTED; 4860 socantrcvmore_locked(so); 4861 socantsendmore(so); 4862 sctp_sowwakeup(inp, so); 4863 sctp_sorwakeup(inp, so); 4864 SCTP_SOWAKEUP(so); 4865 } 4866 } 4867 } 4868 4869 /* 4870 * Make it invalid too, that way if its about to run it will abort 4871 * and return. 4872 */ 4873 /* re-increment the lock */ 4874 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4875 atomic_add_int(&stcb->asoc.refcnt, -1); 4876 } 4877 if (stcb->asoc.refcnt) { 4878 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4879 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4880 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4881 SCTP_INP_INFO_WUNLOCK(); 4882 SCTP_INP_WUNLOCK(inp); 4883 } 4884 SCTP_TCB_SEND_UNLOCK(stcb); 4885 SCTP_TCB_UNLOCK(stcb); 4886 return (0); 4887 } 4888 asoc->state = 0; 4889 if (inp->sctp_tcbhash) { 4890 LIST_REMOVE(stcb, sctp_tcbhash); 4891 } 4892 if (stcb->asoc.in_asocid_hash) { 4893 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4894 } 4895 if (inp->sctp_socket == NULL) { 4896 stcb->sctp_socket = NULL; 4897 } 4898 /* Now lets remove it from the list of ALL associations in the EP */ 4899 LIST_REMOVE(stcb, sctp_tcblist); 4900 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4901 SCTP_INP_INCR_REF(inp); 4902 SCTP_INP_WUNLOCK(inp); 4903 } 4904 /* pull from vtag hash */ 4905 LIST_REMOVE(stcb, sctp_asocs); 4906 sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport); 4907 4908 /* 4909 * Now restop the timers to be sure this is paranoia at is finest! 4910 */ 4911 sctp_stop_association_timers(stcb, true); 4912 4913 /* 4914 * The chunk lists and such SHOULD be empty but we check them just 4915 * in case. 4916 */ 4917 /* anything on the wheel needs to be removed */ 4918 for (i = 0; i < asoc->streamoutcnt; i++) { 4919 struct sctp_stream_out *outs; 4920 4921 outs = &asoc->strmout[i]; 4922 /* now clean up any chunks here */ 4923 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4924 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4925 TAILQ_REMOVE(&outs->outqueue, sp, next); 4926 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1); 4927 sctp_free_spbufspace(stcb, asoc, sp); 4928 if (sp->data) { 4929 if (so) { 4930 /* Still an open socket - report */ 4931 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4932 0, (void *)sp, SCTP_SO_LOCKED); 4933 } 4934 if (sp->data) { 4935 sctp_m_freem(sp->data); 4936 sp->data = NULL; 4937 sp->tail_mbuf = NULL; 4938 sp->length = 0; 4939 } 4940 } 4941 if (sp->net) { 4942 sctp_free_remote_addr(sp->net); 4943 sp->net = NULL; 4944 } 4945 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4946 } 4947 } 4948 /* sa_ignore FREED_MEMORY */ 4949 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4950 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4951 SCTP_FREE(strrst, SCTP_M_STRESET); 4952 } 4953 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4954 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4955 if (sq->data) { 4956 sctp_m_freem(sq->data); 4957 sq->data = NULL; 4958 } 4959 sctp_free_remote_addr(sq->whoFrom); 4960 sq->whoFrom = NULL; 4961 sq->stcb = NULL; 4962 /* Free the ctl entry */ 4963 sctp_free_a_readq(stcb, sq); 4964 /* sa_ignore FREED_MEMORY */ 4965 } 4966 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4967 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4968 if (chk->data) { 4969 sctp_m_freem(chk->data); 4970 chk->data = NULL; 4971 } 4972 if (chk->holds_key_ref) 4973 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4974 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4975 SCTP_DECR_CHK_COUNT(); 4976 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4977 asoc->free_chunk_cnt--; 4978 /* sa_ignore FREED_MEMORY */ 4979 } 4980 /* pending send queue SHOULD be empty */ 4981 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4982 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 4983 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 4984 #ifdef INVARIANTS 4985 } else { 4986 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 4987 #endif 4988 } 4989 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4990 if (chk->data) { 4991 if (so) { 4992 /* Still a socket? */ 4993 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4994 0, chk, SCTP_SO_LOCKED); 4995 } 4996 if (chk->data) { 4997 sctp_m_freem(chk->data); 4998 chk->data = NULL; 4999 } 5000 } 5001 if (chk->holds_key_ref) 5002 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5003 if (chk->whoTo) { 5004 sctp_free_remote_addr(chk->whoTo); 5005 chk->whoTo = NULL; 5006 } 5007 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5008 SCTP_DECR_CHK_COUNT(); 5009 /* sa_ignore FREED_MEMORY */ 5010 } 5011 /* sent queue SHOULD be empty */ 5012 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5013 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5014 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5015 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5016 #ifdef INVARIANTS 5017 } else { 5018 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5019 #endif 5020 } 5021 } 5022 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5023 if (chk->data) { 5024 if (so) { 5025 /* Still a socket? */ 5026 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5027 0, chk, SCTP_SO_LOCKED); 5028 } 5029 if (chk->data) { 5030 sctp_m_freem(chk->data); 5031 chk->data = NULL; 5032 } 5033 } 5034 if (chk->holds_key_ref) 5035 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5036 sctp_free_remote_addr(chk->whoTo); 5037 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5038 SCTP_DECR_CHK_COUNT(); 5039 /* sa_ignore FREED_MEMORY */ 5040 } 5041 #ifdef INVARIANTS 5042 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5043 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5044 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5045 } 5046 } 5047 #endif 5048 /* control queue MAY not be empty */ 5049 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5050 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5051 if (chk->data) { 5052 sctp_m_freem(chk->data); 5053 chk->data = NULL; 5054 } 5055 if (chk->holds_key_ref) 5056 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5057 sctp_free_remote_addr(chk->whoTo); 5058 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5059 SCTP_DECR_CHK_COUNT(); 5060 /* sa_ignore FREED_MEMORY */ 5061 } 5062 /* ASCONF queue MAY not be empty */ 5063 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5064 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5065 if (chk->data) { 5066 sctp_m_freem(chk->data); 5067 chk->data = NULL; 5068 } 5069 if (chk->holds_key_ref) 5070 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5071 sctp_free_remote_addr(chk->whoTo); 5072 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5073 SCTP_DECR_CHK_COUNT(); 5074 /* sa_ignore FREED_MEMORY */ 5075 } 5076 if (asoc->mapping_array) { 5077 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5078 asoc->mapping_array = NULL; 5079 } 5080 if (asoc->nr_mapping_array) { 5081 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5082 asoc->nr_mapping_array = NULL; 5083 } 5084 /* the stream outs */ 5085 if (asoc->strmout) { 5086 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5087 asoc->strmout = NULL; 5088 } 5089 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5090 if (asoc->strmin) { 5091 for (i = 0; i < asoc->streamincnt; i++) { 5092 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5093 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5094 } 5095 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5096 asoc->strmin = NULL; 5097 } 5098 asoc->streamincnt = 0; 5099 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5100 #ifdef INVARIANTS 5101 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5102 panic("no net's left alloc'ed, or list points to itself"); 5103 } 5104 #endif 5105 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5106 sctp_free_remote_addr(net); 5107 } 5108 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5109 /* sa_ignore FREED_MEMORY */ 5110 sctp_remove_laddr(laddr); 5111 } 5112 5113 /* pending asconf (address) parameters */ 5114 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5115 /* sa_ignore FREED_MEMORY */ 5116 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5117 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5118 } 5119 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5120 /* sa_ignore FREED_MEMORY */ 5121 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5122 if (aack->data != NULL) { 5123 sctp_m_freem(aack->data); 5124 } 5125 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5126 } 5127 /* clean up auth stuff */ 5128 if (asoc->local_hmacs) 5129 sctp_free_hmaclist(asoc->local_hmacs); 5130 if (asoc->peer_hmacs) 5131 sctp_free_hmaclist(asoc->peer_hmacs); 5132 5133 if (asoc->local_auth_chunks) 5134 sctp_free_chunklist(asoc->local_auth_chunks); 5135 if (asoc->peer_auth_chunks) 5136 sctp_free_chunklist(asoc->peer_auth_chunks); 5137 5138 sctp_free_authinfo(&asoc->authinfo); 5139 5140 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5141 LIST_REMOVE(shared_key, next); 5142 sctp_free_sharedkey(shared_key); 5143 /* sa_ignore FREED_MEMORY */ 5144 } 5145 5146 /* Insert new items here :> */ 5147 5148 /* Get rid of LOCK */ 5149 SCTP_TCB_SEND_UNLOCK(stcb); 5150 SCTP_TCB_UNLOCK(stcb); 5151 SCTP_TCB_LOCK_DESTROY(stcb); 5152 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5153 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5154 SCTP_INP_INFO_WUNLOCK(); 5155 SCTP_INP_RLOCK(inp); 5156 } 5157 #ifdef SCTP_TRACK_FREED_ASOCS 5158 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5159 /* now clean up the tasoc itself */ 5160 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5161 SCTP_DECR_ASOC_COUNT(); 5162 } else { 5163 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5164 } 5165 #else 5166 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5167 SCTP_DECR_ASOC_COUNT(); 5168 #endif 5169 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5170 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5171 /* 5172 * If its NOT the inp_free calling us AND sctp_close 5173 * as been called, we call back... 5174 */ 5175 SCTP_INP_RUNLOCK(inp); 5176 /* 5177 * This will start the kill timer (if we are the 5178 * last one) since we hold an increment yet. But 5179 * this is the only safe way to do this since 5180 * otherwise if the socket closes at the same time 5181 * we are here we might collide in the cleanup. 5182 */ 5183 sctp_inpcb_free(inp, 5184 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5185 SCTP_CALLED_DIRECTLY_NOCMPSET); 5186 SCTP_INP_DECR_REF(inp); 5187 } else { 5188 /* The socket is still open. */ 5189 SCTP_INP_DECR_REF(inp); 5190 SCTP_INP_RUNLOCK(inp); 5191 } 5192 } 5193 /* destroyed the asoc */ 5194 #ifdef SCTP_LOG_CLOSING 5195 sctp_log_closing(inp, NULL, 11); 5196 #endif 5197 return (1); 5198 } 5199 5200 /* 5201 * determine if a destination is "reachable" based upon the addresses bound 5202 * to the current endpoint (e.g. only v4 or v6 currently bound) 5203 */ 5204 /* 5205 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5206 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5207 * types bound as its endpoint 5208 */ 5209 int 5210 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5211 { 5212 struct sctp_inpcb *inp; 5213 int answer; 5214 5215 /* 5216 * No locks here, the TCB, in all cases is already locked and an 5217 * assoc is up. There is either a INP lock by the caller applied (in 5218 * asconf case when deleting an address) or NOT in the HB case, 5219 * however if HB then the INP increment is up and the INP will not 5220 * be removed (on top of the fact that we have a TCB lock). So we 5221 * only want to read the sctp_flags, which is either bound-all or 5222 * not.. no protection needed since once an assoc is up you can't be 5223 * changing your binding. 5224 */ 5225 inp = stcb->sctp_ep; 5226 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5227 /* if bound all, destination is not restricted */ 5228 /* 5229 * RRS: Question during lock work: Is this correct? If you 5230 * are bound-all you still might need to obey the V4--V6 5231 * flags??? IMO this bound-all stuff needs to be removed! 5232 */ 5233 return (1); 5234 } 5235 /* NOTE: all "scope" checks are done when local addresses are added */ 5236 switch (destaddr->sa_family) { 5237 #ifdef INET6 5238 case AF_INET6: 5239 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5240 break; 5241 #endif 5242 #ifdef INET 5243 case AF_INET: 5244 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5245 break; 5246 #endif 5247 default: 5248 /* invalid family, so it's unreachable */ 5249 answer = 0; 5250 break; 5251 } 5252 return (answer); 5253 } 5254 5255 /* 5256 * update the inp_vflags on an endpoint 5257 */ 5258 static void 5259 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5260 { 5261 struct sctp_laddr *laddr; 5262 5263 /* first clear the flag */ 5264 inp->ip_inp.inp.inp_vflag = 0; 5265 /* set the flag based on addresses on the ep list */ 5266 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5267 if (laddr->ifa == NULL) { 5268 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5269 __func__); 5270 continue; 5271 } 5272 5273 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5274 continue; 5275 } 5276 switch (laddr->ifa->address.sa.sa_family) { 5277 #ifdef INET6 5278 case AF_INET6: 5279 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5280 break; 5281 #endif 5282 #ifdef INET 5283 case AF_INET: 5284 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5285 break; 5286 #endif 5287 default: 5288 break; 5289 } 5290 } 5291 } 5292 5293 /* 5294 * Add the address to the endpoint local address list There is nothing to be 5295 * done if we are bound to all addresses 5296 */ 5297 void 5298 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5299 { 5300 struct sctp_laddr *laddr; 5301 struct sctp_tcb *stcb; 5302 int fnd, error = 0; 5303 5304 fnd = 0; 5305 5306 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5307 /* You are already bound to all. You have it already */ 5308 return; 5309 } 5310 #ifdef INET6 5311 if (ifa->address.sa.sa_family == AF_INET6) { 5312 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5313 /* Can't bind a non-useable addr. */ 5314 return; 5315 } 5316 } 5317 #endif 5318 /* first, is it already present? */ 5319 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5320 if (laddr->ifa == ifa) { 5321 fnd = 1; 5322 break; 5323 } 5324 } 5325 5326 if (fnd == 0) { 5327 /* Not in the ep list */ 5328 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5329 if (error != 0) 5330 return; 5331 inp->laddr_count++; 5332 /* update inp_vflag flags */ 5333 switch (ifa->address.sa.sa_family) { 5334 #ifdef INET6 5335 case AF_INET6: 5336 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5337 break; 5338 #endif 5339 #ifdef INET 5340 case AF_INET: 5341 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5342 break; 5343 #endif 5344 default: 5345 break; 5346 } 5347 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5348 sctp_add_local_addr_restricted(stcb, ifa); 5349 } 5350 } 5351 return; 5352 } 5353 5354 /* 5355 * select a new (hopefully reachable) destination net (should only be used 5356 * when we deleted an ep addr that is the only usable source address to reach 5357 * the destination net) 5358 */ 5359 static void 5360 sctp_select_primary_destination(struct sctp_tcb *stcb) 5361 { 5362 struct sctp_nets *net; 5363 5364 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5365 /* for now, we'll just pick the first reachable one we find */ 5366 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5367 continue; 5368 if (sctp_destination_is_reachable(stcb, 5369 (struct sockaddr *)&net->ro._l_addr)) { 5370 /* found a reachable destination */ 5371 stcb->asoc.primary_destination = net; 5372 } 5373 } 5374 /* I can't there from here! ...we're gonna die shortly... */ 5375 } 5376 5377 /* 5378 * Delete the address from the endpoint local address list. There is nothing 5379 * to be done if we are bound to all addresses 5380 */ 5381 void 5382 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5383 { 5384 struct sctp_laddr *laddr; 5385 int fnd; 5386 5387 fnd = 0; 5388 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5389 /* You are already bound to all. You have it already */ 5390 return; 5391 } 5392 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5393 if (laddr->ifa == ifa) { 5394 fnd = 1; 5395 break; 5396 } 5397 } 5398 if (fnd && (inp->laddr_count < 2)) { 5399 /* can't delete unless there are at LEAST 2 addresses */ 5400 return; 5401 } 5402 if (fnd) { 5403 /* 5404 * clean up any use of this address go through our 5405 * associations and clear any last_used_address that match 5406 * this one for each assoc, see if a new primary_destination 5407 * is needed 5408 */ 5409 struct sctp_tcb *stcb; 5410 5411 /* clean up "next_addr_touse" */ 5412 if (inp->next_addr_touse == laddr) 5413 /* delete this address */ 5414 inp->next_addr_touse = NULL; 5415 5416 /* clean up "last_used_address" */ 5417 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5418 struct sctp_nets *net; 5419 5420 SCTP_TCB_LOCK(stcb); 5421 if (stcb->asoc.last_used_address == laddr) 5422 /* delete this address */ 5423 stcb->asoc.last_used_address = NULL; 5424 /* 5425 * Now spin through all the nets and purge any ref 5426 * to laddr 5427 */ 5428 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5429 if (net->ro._s_addr == laddr->ifa) { 5430 /* Yep, purge src address selected */ 5431 RO_NHFREE(&net->ro); 5432 sctp_free_ifa(net->ro._s_addr); 5433 net->ro._s_addr = NULL; 5434 net->src_addr_selected = 0; 5435 } 5436 } 5437 SCTP_TCB_UNLOCK(stcb); 5438 } /* for each tcb */ 5439 /* remove it from the ep list */ 5440 sctp_remove_laddr(laddr); 5441 inp->laddr_count--; 5442 /* update inp_vflag flags */ 5443 sctp_update_ep_vflag(inp); 5444 } 5445 return; 5446 } 5447 5448 /* 5449 * Add the address to the TCB local address restricted list. 5450 * This is a "pending" address list (eg. addresses waiting for an 5451 * ASCONF-ACK response) and cannot be used as a valid source address. 5452 */ 5453 void 5454 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5455 { 5456 struct sctp_laddr *laddr; 5457 struct sctpladdr *list; 5458 5459 /* 5460 * Assumes TCB is locked.. and possibly the INP. May need to 5461 * confirm/fix that if we need it and is not the case. 5462 */ 5463 list = &stcb->asoc.sctp_restricted_addrs; 5464 5465 #ifdef INET6 5466 if (ifa->address.sa.sa_family == AF_INET6) { 5467 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5468 /* Can't bind a non-existent addr. */ 5469 return; 5470 } 5471 } 5472 #endif 5473 /* does the address already exist? */ 5474 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5475 if (laddr->ifa == ifa) { 5476 return; 5477 } 5478 } 5479 5480 /* add to the list */ 5481 (void)sctp_insert_laddr(list, ifa, 0); 5482 return; 5483 } 5484 5485 /* 5486 * Remove a local address from the TCB local address restricted list 5487 */ 5488 void 5489 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5490 { 5491 struct sctp_inpcb *inp; 5492 struct sctp_laddr *laddr; 5493 5494 /* 5495 * This is called by asconf work. It is assumed that a) The TCB is 5496 * locked and b) The INP is locked. This is true in as much as I can 5497 * trace through the entry asconf code where I did these locks. 5498 * Again, the ASCONF code is a bit different in that it does lock 5499 * the INP during its work often times. This must be since we don't 5500 * want other proc's looking up things while what they are looking 5501 * up is changing :-D 5502 */ 5503 5504 inp = stcb->sctp_ep; 5505 /* if subset bound and don't allow ASCONF's, can't delete last */ 5506 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5507 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5508 if (stcb->sctp_ep->laddr_count < 2) { 5509 /* can't delete last address */ 5510 return; 5511 } 5512 } 5513 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5514 /* remove the address if it exists */ 5515 if (laddr->ifa == NULL) 5516 continue; 5517 if (laddr->ifa == ifa) { 5518 sctp_remove_laddr(laddr); 5519 return; 5520 } 5521 } 5522 5523 /* address not found! */ 5524 return; 5525 } 5526 5527 /* sysctl */ 5528 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5529 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5530 5531 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5532 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5533 int *sctp_cpuarry = NULL; 5534 5535 void 5536 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5537 { 5538 /* Queue a packet to a processor for the specified core */ 5539 struct sctp_mcore_queue *qent; 5540 struct sctp_mcore_ctrl *wkq; 5541 int need_wake = 0; 5542 5543 if (sctp_mcore_workers == NULL) { 5544 /* Something went way bad during setup */ 5545 sctp_input_with_port(m, off, 0); 5546 return; 5547 } 5548 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5549 (sizeof(struct sctp_mcore_queue)), 5550 SCTP_M_MCORE); 5551 if (qent == NULL) { 5552 /* This is trouble */ 5553 sctp_input_with_port(m, off, 0); 5554 return; 5555 } 5556 qent->vn = curvnet; 5557 qent->m = m; 5558 qent->off = off; 5559 qent->v6 = 0; 5560 wkq = &sctp_mcore_workers[cpu_to_use]; 5561 SCTP_MCORE_QLOCK(wkq); 5562 5563 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5564 if (wkq->running == 0) { 5565 need_wake = 1; 5566 } 5567 SCTP_MCORE_QUNLOCK(wkq); 5568 if (need_wake) { 5569 wakeup(&wkq->running); 5570 } 5571 } 5572 5573 static void 5574 sctp_mcore_thread(void *arg) 5575 { 5576 5577 struct sctp_mcore_ctrl *wkq; 5578 struct sctp_mcore_queue *qent; 5579 5580 wkq = (struct sctp_mcore_ctrl *)arg; 5581 struct mbuf *m; 5582 int off, v6; 5583 5584 /* Wait for first tickle */ 5585 SCTP_MCORE_LOCK(wkq); 5586 wkq->running = 0; 5587 msleep(&wkq->running, 5588 &wkq->core_mtx, 5589 0, "wait for pkt", 0); 5590 SCTP_MCORE_UNLOCK(wkq); 5591 5592 /* Bind to our cpu */ 5593 thread_lock(curthread); 5594 sched_bind(curthread, wkq->cpuid); 5595 thread_unlock(curthread); 5596 5597 /* Now lets start working */ 5598 SCTP_MCORE_LOCK(wkq); 5599 /* Now grab lock and go */ 5600 for (;;) { 5601 SCTP_MCORE_QLOCK(wkq); 5602 skip_sleep: 5603 wkq->running = 1; 5604 qent = TAILQ_FIRST(&wkq->que); 5605 if (qent) { 5606 TAILQ_REMOVE(&wkq->que, qent, next); 5607 SCTP_MCORE_QUNLOCK(wkq); 5608 CURVNET_SET(qent->vn); 5609 m = qent->m; 5610 off = qent->off; 5611 v6 = qent->v6; 5612 SCTP_FREE(qent, SCTP_M_MCORE); 5613 if (v6 == 0) { 5614 sctp_input_with_port(m, off, 0); 5615 } else { 5616 SCTP_PRINTF("V6 not yet supported\n"); 5617 sctp_m_freem(m); 5618 } 5619 CURVNET_RESTORE(); 5620 SCTP_MCORE_QLOCK(wkq); 5621 } 5622 wkq->running = 0; 5623 if (!TAILQ_EMPTY(&wkq->que)) { 5624 goto skip_sleep; 5625 } 5626 SCTP_MCORE_QUNLOCK(wkq); 5627 msleep(&wkq->running, 5628 &wkq->core_mtx, 5629 0, "wait for pkt", 0); 5630 } 5631 } 5632 5633 static void 5634 sctp_startup_mcore_threads(void) 5635 { 5636 int i, cpu; 5637 5638 if (mp_ncpus == 1) 5639 return; 5640 5641 if (sctp_mcore_workers != NULL) { 5642 /* 5643 * Already been here in some previous vnet? 5644 */ 5645 return; 5646 } 5647 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5648 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5649 SCTP_M_MCORE); 5650 if (sctp_mcore_workers == NULL) { 5651 /* TSNH I hope */ 5652 return; 5653 } 5654 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5655 sizeof(struct sctp_mcore_ctrl))); 5656 /* Init the structures */ 5657 for (i = 0; i <= mp_maxid; i++) { 5658 TAILQ_INIT(&sctp_mcore_workers[i].que); 5659 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5660 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5661 sctp_mcore_workers[i].cpuid = i; 5662 } 5663 if (sctp_cpuarry == NULL) { 5664 SCTP_MALLOC(sctp_cpuarry, int *, 5665 (mp_ncpus * sizeof(int)), 5666 SCTP_M_MCORE); 5667 i = 0; 5668 CPU_FOREACH(cpu) { 5669 sctp_cpuarry[i] = cpu; 5670 i++; 5671 } 5672 } 5673 /* Now start them all */ 5674 CPU_FOREACH(cpu) { 5675 (void)kproc_create(sctp_mcore_thread, 5676 (void *)&sctp_mcore_workers[cpu], 5677 &sctp_mcore_workers[cpu].thread_proc, 5678 0, 5679 SCTP_KTHREAD_PAGES, 5680 SCTP_MCORE_NAME); 5681 } 5682 } 5683 #endif 5684 5685 void 5686 sctp_pcb_init(void) 5687 { 5688 /* 5689 * SCTP initialization for the PCB structures should be called by 5690 * the sctp_init() function. 5691 */ 5692 int i; 5693 struct timeval tv; 5694 5695 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5696 /* error I was called twice */ 5697 return; 5698 } 5699 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5700 5701 #if defined(SCTP_LOCAL_TRACE_BUF) 5702 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5703 #endif 5704 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5705 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5706 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5707 SCTP_M_MCORE); 5708 #endif 5709 (void)SCTP_GETTIME_TIMEVAL(&tv); 5710 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5711 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5712 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5713 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5714 #else 5715 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5716 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5717 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5718 #endif 5719 /* init the empty list of (All) Endpoints */ 5720 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5721 5722 /* init the hash table of endpoints */ 5723 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5724 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5725 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5726 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5727 &SCTP_BASE_INFO(hashasocmark)); 5728 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5729 &SCTP_BASE_INFO(hashmark)); 5730 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5731 &SCTP_BASE_INFO(hashtcpmark)); 5732 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5733 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5734 &SCTP_BASE_INFO(hashvrfmark)); 5735 5736 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5737 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5738 /* init the zones */ 5739 /* 5740 * FIX ME: Should check for NULL returns, but if it does fail we are 5741 * doomed to panic anyways... add later maybe. 5742 */ 5743 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5744 sizeof(struct sctp_inpcb), maxsockets); 5745 5746 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5747 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5748 5749 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5750 sizeof(struct sctp_laddr), 5751 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5752 5753 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5754 sizeof(struct sctp_nets), 5755 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5756 5757 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5758 sizeof(struct sctp_tmit_chunk), 5759 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5760 5761 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5762 sizeof(struct sctp_queued_to_read), 5763 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5764 5765 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5766 sizeof(struct sctp_stream_queue_pending), 5767 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5768 5769 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5770 sizeof(struct sctp_asconf), 5771 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5772 5773 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5774 sizeof(struct sctp_asconf_ack), 5775 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5776 5777 /* Master Lock INIT for info structure */ 5778 SCTP_INP_INFO_LOCK_INIT(); 5779 SCTP_STATLOG_INIT_LOCK(); 5780 5781 SCTP_IPI_COUNT_INIT(); 5782 SCTP_IPI_ADDR_INIT(); 5783 #ifdef SCTP_PACKET_LOGGING 5784 SCTP_IP_PKTLOG_INIT(); 5785 #endif 5786 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5787 5788 SCTP_WQ_ADDR_INIT(); 5789 /* not sure if we need all the counts */ 5790 SCTP_BASE_INFO(ipi_count_ep) = 0; 5791 /* assoc/tcb zone info */ 5792 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5793 /* local addrlist zone info */ 5794 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5795 /* remote addrlist zone info */ 5796 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5797 /* chunk info */ 5798 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5799 5800 /* socket queue zone info */ 5801 SCTP_BASE_INFO(ipi_count_readq) = 0; 5802 5803 /* stream out queue cont */ 5804 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5805 5806 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5807 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5808 5809 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5810 5811 /* Init the TIMEWAIT list */ 5812 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5813 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5814 } 5815 sctp_startup_iterator(); 5816 5817 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5818 sctp_startup_mcore_threads(); 5819 #endif 5820 5821 /* 5822 * INIT the default VRF which for BSD is the only one, other O/S's 5823 * may have more. But initially they must start with one and then 5824 * add the VRF's as addresses are added. 5825 */ 5826 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5827 } 5828 5829 /* 5830 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5831 */ 5832 void 5833 sctp_pcb_finish(void) 5834 { 5835 struct sctp_vrflist *vrf_bucket; 5836 struct sctp_vrf *vrf, *nvrf; 5837 struct sctp_ifn *ifn, *nifn; 5838 struct sctp_ifa *ifa, *nifa; 5839 struct sctpvtaghead *chain; 5840 struct sctp_tagblock *twait_block, *prev_twait_block; 5841 struct sctp_laddr *wi, *nwi; 5842 int i; 5843 struct sctp_iterator *it, *nit; 5844 5845 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5846 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5847 return; 5848 } 5849 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5850 /* 5851 * In FreeBSD the iterator thread never exits but we do clean up. 5852 * The only way FreeBSD reaches here is if we have VRF's but we 5853 * still add the ifdef to make it compile on old versions. 5854 */ 5855 retry: 5856 SCTP_IPI_ITERATOR_WQ_LOCK(); 5857 /* 5858 * sctp_iterator_worker() might be working on an it entry without 5859 * holding the lock. We won't find it on the list either and 5860 * continue and free/destroy it. While holding the lock, spin, to 5861 * avoid the race condition as sctp_iterator_worker() will have to 5862 * wait to re-acquire the lock. 5863 */ 5864 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5865 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5866 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5867 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5868 DELAY(10); 5869 goto retry; 5870 } 5871 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5872 if (it->vn != curvnet) { 5873 continue; 5874 } 5875 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5876 if (it->function_atend != NULL) { 5877 (*it->function_atend) (it->pointer, it->val); 5878 } 5879 SCTP_FREE(it, SCTP_M_ITER); 5880 } 5881 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5882 SCTP_ITERATOR_LOCK(); 5883 if ((sctp_it_ctl.cur_it) && 5884 (sctp_it_ctl.cur_it->vn == curvnet)) { 5885 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5886 } 5887 SCTP_ITERATOR_UNLOCK(); 5888 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5889 SCTP_WQ_ADDR_LOCK(); 5890 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5891 LIST_REMOVE(wi, sctp_nxt_addr); 5892 SCTP_DECR_LADDR_COUNT(); 5893 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5894 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5895 } 5896 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5897 } 5898 SCTP_WQ_ADDR_UNLOCK(); 5899 5900 /* 5901 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5902 * destroyed first). 5903 */ 5904 SCTP_IPI_ADDR_WLOCK(); 5905 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5906 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5907 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5908 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5909 /* free the ifa */ 5910 LIST_REMOVE(ifa, next_bucket); 5911 LIST_REMOVE(ifa, next_ifa); 5912 SCTP_FREE(ifa, SCTP_M_IFA); 5913 } 5914 /* free the ifn */ 5915 LIST_REMOVE(ifn, next_bucket); 5916 LIST_REMOVE(ifn, next_ifn); 5917 SCTP_FREE(ifn, SCTP_M_IFN); 5918 } 5919 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5920 /* free the vrf */ 5921 LIST_REMOVE(vrf, next_vrf); 5922 SCTP_FREE(vrf, SCTP_M_VRF); 5923 } 5924 SCTP_IPI_ADDR_WUNLOCK(); 5925 /* free the vrf hashes */ 5926 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5927 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5928 5929 /* 5930 * free the TIMEWAIT list elements malloc'd in the function 5931 * sctp_add_vtag_to_timewait()... 5932 */ 5933 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5934 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5935 if (!LIST_EMPTY(chain)) { 5936 prev_twait_block = NULL; 5937 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5938 if (prev_twait_block) { 5939 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5940 } 5941 prev_twait_block = twait_block; 5942 } 5943 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5944 } 5945 } 5946 5947 /* free the locks and mutexes */ 5948 #ifdef SCTP_PACKET_LOGGING 5949 SCTP_IP_PKTLOG_DESTROY(); 5950 #endif 5951 SCTP_IPI_ADDR_DESTROY(); 5952 SCTP_STATLOG_DESTROY(); 5953 SCTP_INP_INFO_LOCK_DESTROY(); 5954 5955 SCTP_WQ_ADDR_DESTROY(); 5956 5957 /* Get rid of other stuff too. */ 5958 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5959 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5960 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5961 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5962 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5963 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5964 5965 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5966 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5967 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5968 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5969 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5970 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5971 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5972 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5973 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5974 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5975 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5976 #endif 5977 } 5978 5979 int 5980 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5981 int offset, int limit, 5982 struct sockaddr *src, struct sockaddr *dst, 5983 struct sockaddr *altsa, uint16_t port) 5984 { 5985 /* 5986 * grub through the INIT pulling addresses and loading them to the 5987 * nets structure in the asoc. The from address in the mbuf should 5988 * also be loaded (if it is not already). This routine can be called 5989 * with either INIT or INIT-ACK's as long as the m points to the IP 5990 * packet and the offset points to the beginning of the parameters. 5991 */ 5992 struct sctp_inpcb *inp; 5993 struct sctp_nets *net, *nnet, *net_tmp; 5994 struct sctp_paramhdr *phdr, param_buf; 5995 struct sctp_tcb *stcb_tmp; 5996 uint16_t ptype, plen; 5997 struct sockaddr *sa; 5998 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5999 struct sctp_auth_random *p_random = NULL; 6000 uint16_t random_len = 0; 6001 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6002 struct sctp_auth_hmac_algo *hmacs = NULL; 6003 uint16_t hmacs_len = 0; 6004 uint8_t saw_asconf = 0; 6005 uint8_t saw_asconf_ack = 0; 6006 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6007 struct sctp_auth_chunk_list *chunks = NULL; 6008 uint16_t num_chunks = 0; 6009 sctp_key_t *new_key; 6010 uint32_t keylen; 6011 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6012 uint8_t peer_supports_ecn; 6013 uint8_t peer_supports_prsctp; 6014 uint8_t peer_supports_auth; 6015 uint8_t peer_supports_asconf; 6016 uint8_t peer_supports_asconf_ack; 6017 uint8_t peer_supports_reconfig; 6018 uint8_t peer_supports_nrsack; 6019 uint8_t peer_supports_pktdrop; 6020 uint8_t peer_supports_idata; 6021 #ifdef INET 6022 struct sockaddr_in sin; 6023 #endif 6024 #ifdef INET6 6025 struct sockaddr_in6 sin6; 6026 #endif 6027 6028 /* First get the destination address setup too. */ 6029 #ifdef INET 6030 memset(&sin, 0, sizeof(sin)); 6031 sin.sin_family = AF_INET; 6032 sin.sin_len = sizeof(sin); 6033 sin.sin_port = stcb->rport; 6034 #endif 6035 #ifdef INET6 6036 memset(&sin6, 0, sizeof(sin6)); 6037 sin6.sin6_family = AF_INET6; 6038 sin6.sin6_len = sizeof(struct sockaddr_in6); 6039 sin6.sin6_port = stcb->rport; 6040 #endif 6041 if (altsa) { 6042 sa = altsa; 6043 } else { 6044 sa = src; 6045 } 6046 peer_supports_idata = 0; 6047 peer_supports_ecn = 0; 6048 peer_supports_prsctp = 0; 6049 peer_supports_auth = 0; 6050 peer_supports_asconf = 0; 6051 peer_supports_asconf_ack = 0; 6052 peer_supports_reconfig = 0; 6053 peer_supports_nrsack = 0; 6054 peer_supports_pktdrop = 0; 6055 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6056 /* mark all addresses that we have currently on the list */ 6057 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6058 } 6059 /* does the source address already exist? if so skip it */ 6060 inp = stcb->sctp_ep; 6061 atomic_add_int(&stcb->asoc.refcnt, 1); 6062 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6063 atomic_add_int(&stcb->asoc.refcnt, -1); 6064 6065 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6066 /* we must add the source address */ 6067 /* no scope set here since we have a tcb already. */ 6068 switch (sa->sa_family) { 6069 #ifdef INET 6070 case AF_INET: 6071 if (stcb->asoc.scope.ipv4_addr_legal) { 6072 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6073 return (-1); 6074 } 6075 } 6076 break; 6077 #endif 6078 #ifdef INET6 6079 case AF_INET6: 6080 if (stcb->asoc.scope.ipv6_addr_legal) { 6081 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6082 return (-2); 6083 } 6084 } 6085 break; 6086 #endif 6087 default: 6088 break; 6089 } 6090 } else { 6091 if (net_tmp != NULL && stcb_tmp == stcb) { 6092 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6093 } else if (stcb_tmp != stcb) { 6094 /* It belongs to another association? */ 6095 if (stcb_tmp) 6096 SCTP_TCB_UNLOCK(stcb_tmp); 6097 return (-3); 6098 } 6099 } 6100 if (stcb->asoc.state == 0) { 6101 /* the assoc was freed? */ 6102 return (-4); 6103 } 6104 /* now we must go through each of the params. */ 6105 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6106 while (phdr) { 6107 ptype = ntohs(phdr->param_type); 6108 plen = ntohs(phdr->param_length); 6109 /* 6110 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6111 * (uint32_t)ptype, (int)plen); 6112 */ 6113 if (offset + plen > limit) { 6114 break; 6115 } 6116 if (plen < sizeof(struct sctp_paramhdr)) { 6117 break; 6118 } 6119 #ifdef INET 6120 if (ptype == SCTP_IPV4_ADDRESS) { 6121 if (stcb->asoc.scope.ipv4_addr_legal) { 6122 struct sctp_ipv4addr_param *p4, p4_buf; 6123 6124 /* ok get the v4 address and check/add */ 6125 phdr = sctp_get_next_param(m, offset, 6126 (struct sctp_paramhdr *)&p4_buf, 6127 sizeof(p4_buf)); 6128 if (plen != sizeof(struct sctp_ipv4addr_param) || 6129 phdr == NULL) { 6130 return (-5); 6131 } 6132 p4 = (struct sctp_ipv4addr_param *)phdr; 6133 sin.sin_addr.s_addr = p4->addr; 6134 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6135 /* Skip multi-cast addresses */ 6136 goto next_param; 6137 } 6138 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6139 (sin.sin_addr.s_addr == INADDR_ANY)) { 6140 goto next_param; 6141 } 6142 sa = (struct sockaddr *)&sin; 6143 inp = stcb->sctp_ep; 6144 atomic_add_int(&stcb->asoc.refcnt, 1); 6145 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6146 dst, stcb); 6147 atomic_add_int(&stcb->asoc.refcnt, -1); 6148 6149 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6150 inp == NULL) { 6151 /* we must add the source address */ 6152 /* 6153 * no scope set since we have a tcb 6154 * already 6155 */ 6156 6157 /* 6158 * we must validate the state again 6159 * here 6160 */ 6161 add_it_now: 6162 if (stcb->asoc.state == 0) { 6163 /* the assoc was freed? */ 6164 return (-7); 6165 } 6166 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6167 return (-8); 6168 } 6169 } else if (stcb_tmp == stcb) { 6170 if (stcb->asoc.state == 0) { 6171 /* the assoc was freed? */ 6172 return (-10); 6173 } 6174 if (net != NULL) { 6175 /* clear flag */ 6176 net->dest_state &= 6177 ~SCTP_ADDR_NOT_IN_ASSOC; 6178 } 6179 } else { 6180 /* 6181 * strange, address is in another 6182 * assoc? straighten out locks. 6183 */ 6184 if (stcb_tmp) { 6185 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6186 struct mbuf *op_err; 6187 char msg[SCTP_DIAG_INFO_LEN]; 6188 6189 /* 6190 * in setup state we 6191 * abort this guy 6192 */ 6193 SCTP_SNPRINTF(msg, sizeof(msg), 6194 "%s:%d at %s", __FILE__, __LINE__, __func__); 6195 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6196 msg); 6197 sctp_abort_an_association(stcb_tmp->sctp_ep, 6198 stcb_tmp, op_err, false, 6199 SCTP_SO_NOT_LOCKED); 6200 goto add_it_now; 6201 } 6202 SCTP_TCB_UNLOCK(stcb_tmp); 6203 } 6204 6205 if (stcb->asoc.state == 0) { 6206 /* the assoc was freed? */ 6207 return (-12); 6208 } 6209 return (-13); 6210 } 6211 } 6212 } else 6213 #endif 6214 #ifdef INET6 6215 if (ptype == SCTP_IPV6_ADDRESS) { 6216 if (stcb->asoc.scope.ipv6_addr_legal) { 6217 /* ok get the v6 address and check/add */ 6218 struct sctp_ipv6addr_param *p6, p6_buf; 6219 6220 phdr = sctp_get_next_param(m, offset, 6221 (struct sctp_paramhdr *)&p6_buf, 6222 sizeof(p6_buf)); 6223 if (plen != sizeof(struct sctp_ipv6addr_param) || 6224 phdr == NULL) { 6225 return (-14); 6226 } 6227 p6 = (struct sctp_ipv6addr_param *)phdr; 6228 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6229 sizeof(p6->addr)); 6230 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6231 /* Skip multi-cast addresses */ 6232 goto next_param; 6233 } 6234 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6235 /* 6236 * Link local make no sense without 6237 * scope 6238 */ 6239 goto next_param; 6240 } 6241 sa = (struct sockaddr *)&sin6; 6242 inp = stcb->sctp_ep; 6243 atomic_add_int(&stcb->asoc.refcnt, 1); 6244 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6245 dst, stcb); 6246 atomic_add_int(&stcb->asoc.refcnt, -1); 6247 if (stcb_tmp == NULL && 6248 (inp == stcb->sctp_ep || inp == NULL)) { 6249 /* 6250 * we must validate the state again 6251 * here 6252 */ 6253 add_it_now6: 6254 if (stcb->asoc.state == 0) { 6255 /* the assoc was freed? */ 6256 return (-16); 6257 } 6258 /* 6259 * we must add the address, no scope 6260 * set 6261 */ 6262 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6263 return (-17); 6264 } 6265 } else if (stcb_tmp == stcb) { 6266 /* 6267 * we must validate the state again 6268 * here 6269 */ 6270 if (stcb->asoc.state == 0) { 6271 /* the assoc was freed? */ 6272 return (-19); 6273 } 6274 if (net != NULL) { 6275 /* clear flag */ 6276 net->dest_state &= 6277 ~SCTP_ADDR_NOT_IN_ASSOC; 6278 } 6279 } else { 6280 /* 6281 * strange, address is in another 6282 * assoc? straighten out locks. 6283 */ 6284 if (stcb_tmp) { 6285 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6286 struct mbuf *op_err; 6287 char msg[SCTP_DIAG_INFO_LEN]; 6288 6289 /* 6290 * in setup state we 6291 * abort this guy 6292 */ 6293 SCTP_SNPRINTF(msg, sizeof(msg), 6294 "%s:%d at %s", __FILE__, __LINE__, __func__); 6295 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6296 msg); 6297 sctp_abort_an_association(stcb_tmp->sctp_ep, 6298 stcb_tmp, op_err, false, 6299 SCTP_SO_NOT_LOCKED); 6300 goto add_it_now6; 6301 } 6302 SCTP_TCB_UNLOCK(stcb_tmp); 6303 } 6304 if (stcb->asoc.state == 0) { 6305 /* the assoc was freed? */ 6306 return (-21); 6307 } 6308 return (-22); 6309 } 6310 } 6311 } else 6312 #endif 6313 if (ptype == SCTP_ECN_CAPABLE) { 6314 peer_supports_ecn = 1; 6315 } else if (ptype == SCTP_ULP_ADAPTATION) { 6316 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6317 struct sctp_adaptation_layer_indication ai, 6318 *aip; 6319 6320 phdr = sctp_get_next_param(m, offset, 6321 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6322 aip = (struct sctp_adaptation_layer_indication *)phdr; 6323 if (aip) { 6324 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6325 stcb->asoc.adaptation_needed = 1; 6326 } 6327 } 6328 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6329 struct sctp_asconf_addr_param lstore, *fee; 6330 int lptype; 6331 struct sockaddr *lsa = NULL; 6332 #ifdef INET 6333 struct sctp_asconf_addrv4_param *fii; 6334 #endif 6335 6336 if (stcb->asoc.asconf_supported == 0) { 6337 return (-100); 6338 } 6339 if (plen > sizeof(lstore)) { 6340 return (-23); 6341 } 6342 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6343 return (-101); 6344 } 6345 phdr = sctp_get_next_param(m, offset, 6346 (struct sctp_paramhdr *)&lstore, 6347 plen); 6348 if (phdr == NULL) { 6349 return (-24); 6350 } 6351 fee = (struct sctp_asconf_addr_param *)phdr; 6352 lptype = ntohs(fee->addrp.ph.param_type); 6353 switch (lptype) { 6354 #ifdef INET 6355 case SCTP_IPV4_ADDRESS: 6356 if (plen != 6357 sizeof(struct sctp_asconf_addrv4_param)) { 6358 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6359 (int)sizeof(struct sctp_asconf_addrv4_param), 6360 plen); 6361 } else { 6362 fii = (struct sctp_asconf_addrv4_param *)fee; 6363 sin.sin_addr.s_addr = fii->addrp.addr; 6364 lsa = (struct sockaddr *)&sin; 6365 } 6366 break; 6367 #endif 6368 #ifdef INET6 6369 case SCTP_IPV6_ADDRESS: 6370 if (plen != 6371 sizeof(struct sctp_asconf_addr_param)) { 6372 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6373 (int)sizeof(struct sctp_asconf_addr_param), 6374 plen); 6375 } else { 6376 memcpy(sin6.sin6_addr.s6_addr, 6377 fee->addrp.addr, 6378 sizeof(fee->addrp.addr)); 6379 lsa = (struct sockaddr *)&sin6; 6380 } 6381 break; 6382 #endif 6383 default: 6384 break; 6385 } 6386 if (lsa) { 6387 (void)sctp_set_primary_addr(stcb, sa, NULL); 6388 } 6389 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6390 stcb->asoc.peer_supports_nat = 1; 6391 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6392 /* Peer supports pr-sctp */ 6393 peer_supports_prsctp = 1; 6394 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6395 /* A supported extension chunk */ 6396 struct sctp_supported_chunk_types_param *pr_supported; 6397 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6398 int num_ent, i; 6399 6400 if (plen > sizeof(local_store)) { 6401 return (-35); 6402 } 6403 phdr = sctp_get_next_param(m, offset, 6404 (struct sctp_paramhdr *)&local_store, plen); 6405 if (phdr == NULL) { 6406 return (-25); 6407 } 6408 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6409 num_ent = plen - sizeof(struct sctp_paramhdr); 6410 for (i = 0; i < num_ent; i++) { 6411 switch (pr_supported->chunk_types[i]) { 6412 case SCTP_ASCONF: 6413 peer_supports_asconf = 1; 6414 break; 6415 case SCTP_ASCONF_ACK: 6416 peer_supports_asconf_ack = 1; 6417 break; 6418 case SCTP_FORWARD_CUM_TSN: 6419 peer_supports_prsctp = 1; 6420 break; 6421 case SCTP_PACKET_DROPPED: 6422 peer_supports_pktdrop = 1; 6423 break; 6424 case SCTP_NR_SELECTIVE_ACK: 6425 peer_supports_nrsack = 1; 6426 break; 6427 case SCTP_STREAM_RESET: 6428 peer_supports_reconfig = 1; 6429 break; 6430 case SCTP_AUTHENTICATION: 6431 peer_supports_auth = 1; 6432 break; 6433 case SCTP_IDATA: 6434 peer_supports_idata = 1; 6435 break; 6436 default: 6437 /* one I have not learned yet */ 6438 break; 6439 } 6440 } 6441 } else if (ptype == SCTP_RANDOM) { 6442 if (plen > sizeof(random_store)) 6443 break; 6444 if (got_random) { 6445 /* already processed a RANDOM */ 6446 goto next_param; 6447 } 6448 phdr = sctp_get_next_param(m, offset, 6449 (struct sctp_paramhdr *)random_store, 6450 plen); 6451 if (phdr == NULL) 6452 return (-26); 6453 p_random = (struct sctp_auth_random *)phdr; 6454 random_len = plen - sizeof(*p_random); 6455 /* enforce the random length */ 6456 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6457 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6458 return (-27); 6459 } 6460 got_random = 1; 6461 } else if (ptype == SCTP_HMAC_LIST) { 6462 uint16_t num_hmacs; 6463 uint16_t i; 6464 6465 if (plen > sizeof(hmacs_store)) 6466 break; 6467 if (got_hmacs) { 6468 /* already processed a HMAC list */ 6469 goto next_param; 6470 } 6471 phdr = sctp_get_next_param(m, offset, 6472 (struct sctp_paramhdr *)hmacs_store, 6473 plen); 6474 if (phdr == NULL) 6475 return (-28); 6476 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6477 hmacs_len = plen - sizeof(*hmacs); 6478 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6479 /* validate the hmac list */ 6480 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6481 return (-29); 6482 } 6483 if (stcb->asoc.peer_hmacs != NULL) 6484 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6485 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6486 if (stcb->asoc.peer_hmacs != NULL) { 6487 for (i = 0; i < num_hmacs; i++) { 6488 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6489 ntohs(hmacs->hmac_ids[i])); 6490 } 6491 } 6492 got_hmacs = 1; 6493 } else if (ptype == SCTP_CHUNK_LIST) { 6494 int i; 6495 6496 if (plen > sizeof(chunks_store)) 6497 break; 6498 if (got_chklist) { 6499 /* already processed a Chunks list */ 6500 goto next_param; 6501 } 6502 phdr = sctp_get_next_param(m, offset, 6503 (struct sctp_paramhdr *)chunks_store, 6504 plen); 6505 if (phdr == NULL) 6506 return (-30); 6507 chunks = (struct sctp_auth_chunk_list *)phdr; 6508 num_chunks = plen - sizeof(*chunks); 6509 if (stcb->asoc.peer_auth_chunks != NULL) 6510 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6511 else 6512 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6513 for (i = 0; i < num_chunks; i++) { 6514 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6515 stcb->asoc.peer_auth_chunks); 6516 /* record asconf/asconf-ack if listed */ 6517 if (chunks->chunk_types[i] == SCTP_ASCONF) 6518 saw_asconf = 1; 6519 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6520 saw_asconf_ack = 1; 6521 } 6522 got_chklist = 1; 6523 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6524 (ptype == SCTP_STATE_COOKIE) || 6525 (ptype == SCTP_UNRECOG_PARAM) || 6526 (ptype == SCTP_COOKIE_PRESERVE) || 6527 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6528 (ptype == SCTP_ADD_IP_ADDRESS) || 6529 (ptype == SCTP_DEL_IP_ADDRESS) || 6530 (ptype == SCTP_ERROR_CAUSE_IND) || 6531 (ptype == SCTP_SUCCESS_REPORT)) { 6532 /* don't care */ 6533 } else { 6534 if ((ptype & 0x8000) == 0x0000) { 6535 /* 6536 * must stop processing the rest of the 6537 * param's. Any report bits were handled 6538 * with the call to 6539 * sctp_arethere_unrecognized_parameters() 6540 * when the INIT or INIT-ACK was first seen. 6541 */ 6542 break; 6543 } 6544 } 6545 6546 next_param: 6547 offset += SCTP_SIZE32(plen); 6548 if (offset >= limit) { 6549 break; 6550 } 6551 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6552 sizeof(param_buf)); 6553 } 6554 /* Now check to see if we need to purge any addresses */ 6555 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6556 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6557 SCTP_ADDR_NOT_IN_ASSOC) { 6558 /* This address has been removed from the asoc */ 6559 /* remove and free it */ 6560 stcb->asoc.numnets--; 6561 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6562 if (net == stcb->asoc.alternate) { 6563 sctp_free_remote_addr(stcb->asoc.alternate); 6564 stcb->asoc.alternate = NULL; 6565 } 6566 if (net == stcb->asoc.primary_destination) { 6567 stcb->asoc.primary_destination = NULL; 6568 sctp_select_primary_destination(stcb); 6569 } 6570 sctp_free_remote_addr(net); 6571 } 6572 } 6573 if ((stcb->asoc.ecn_supported == 1) && 6574 (peer_supports_ecn == 0)) { 6575 stcb->asoc.ecn_supported = 0; 6576 } 6577 if ((stcb->asoc.prsctp_supported == 1) && 6578 (peer_supports_prsctp == 0)) { 6579 stcb->asoc.prsctp_supported = 0; 6580 } 6581 if ((stcb->asoc.auth_supported == 1) && 6582 ((peer_supports_auth == 0) || 6583 (got_random == 0) || (got_hmacs == 0))) { 6584 stcb->asoc.auth_supported = 0; 6585 } 6586 if ((stcb->asoc.asconf_supported == 1) && 6587 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6588 (stcb->asoc.auth_supported == 0) || 6589 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6590 stcb->asoc.asconf_supported = 0; 6591 } 6592 if ((stcb->asoc.reconfig_supported == 1) && 6593 (peer_supports_reconfig == 0)) { 6594 stcb->asoc.reconfig_supported = 0; 6595 } 6596 if ((stcb->asoc.idata_supported == 1) && 6597 (peer_supports_idata == 0)) { 6598 stcb->asoc.idata_supported = 0; 6599 } 6600 if ((stcb->asoc.nrsack_supported == 1) && 6601 (peer_supports_nrsack == 0)) { 6602 stcb->asoc.nrsack_supported = 0; 6603 } 6604 if ((stcb->asoc.pktdrop_supported == 1) && 6605 (peer_supports_pktdrop == 0)) { 6606 stcb->asoc.pktdrop_supported = 0; 6607 } 6608 /* validate authentication required parameters */ 6609 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6610 /* peer does not support auth but sent a chunks list? */ 6611 return (-31); 6612 } 6613 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6614 /* peer supports asconf but not auth? */ 6615 return (-32); 6616 } else if ((peer_supports_asconf == 1) && 6617 (peer_supports_auth == 1) && 6618 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6619 return (-33); 6620 } 6621 /* concatenate the full random key */ 6622 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6623 if (chunks != NULL) { 6624 keylen += sizeof(*chunks) + num_chunks; 6625 } 6626 new_key = sctp_alloc_key(keylen); 6627 if (new_key != NULL) { 6628 /* copy in the RANDOM */ 6629 if (p_random != NULL) { 6630 keylen = sizeof(*p_random) + random_len; 6631 memcpy(new_key->key, p_random, keylen); 6632 } else { 6633 keylen = 0; 6634 } 6635 /* append in the AUTH chunks */ 6636 if (chunks != NULL) { 6637 memcpy(new_key->key + keylen, chunks, 6638 sizeof(*chunks) + num_chunks); 6639 keylen += sizeof(*chunks) + num_chunks; 6640 } 6641 /* append in the HMACs */ 6642 if (hmacs != NULL) { 6643 memcpy(new_key->key + keylen, hmacs, 6644 sizeof(*hmacs) + hmacs_len); 6645 } 6646 } else { 6647 /* failed to get memory for the key */ 6648 return (-34); 6649 } 6650 if (stcb->asoc.authinfo.peer_random != NULL) 6651 sctp_free_key(stcb->asoc.authinfo.peer_random); 6652 stcb->asoc.authinfo.peer_random = new_key; 6653 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6654 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6655 6656 return (0); 6657 } 6658 6659 int 6660 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6661 struct sctp_nets *net) 6662 { 6663 /* make sure the requested primary address exists in the assoc */ 6664 if (net == NULL && sa) 6665 net = sctp_findnet(stcb, sa); 6666 6667 if (net == NULL) { 6668 /* didn't find the requested primary address! */ 6669 return (-1); 6670 } else { 6671 /* set the primary address */ 6672 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6673 /* Must be confirmed, so queue to set */ 6674 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6675 return (0); 6676 } 6677 stcb->asoc.primary_destination = net; 6678 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6679 sctp_free_remote_addr(stcb->asoc.alternate); 6680 stcb->asoc.alternate = NULL; 6681 } 6682 net = TAILQ_FIRST(&stcb->asoc.nets); 6683 if (net != stcb->asoc.primary_destination) { 6684 /* 6685 * first one on the list is NOT the primary 6686 * sctp_cmpaddr() is much more efficient if the 6687 * primary is the first on the list, make it so. 6688 */ 6689 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6690 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6691 } 6692 return (0); 6693 } 6694 } 6695 6696 bool 6697 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6698 { 6699 struct sctpasochead *head; 6700 struct sctp_tcb *stcb; 6701 6702 SCTP_INP_INFO_LOCK_ASSERT(); 6703 6704 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, SCTP_BASE_INFO(hashasocmark))]; 6705 LIST_FOREACH(stcb, head, sctp_asocs) { 6706 /* 6707 * We choose not to lock anything here. TCB's can't be 6708 * removed since we have the read lock, so they can't be 6709 * freed on us, same thing for the INP. I may be wrong with 6710 * this assumption, but we will go with it for now :-) 6711 */ 6712 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6713 continue; 6714 } 6715 if (stcb->asoc.my_vtag == tag) { 6716 /* candidate */ 6717 if (stcb->rport != rport) { 6718 continue; 6719 } 6720 if (stcb->sctp_ep->sctp_lport != lport) { 6721 continue; 6722 } 6723 /* The tag is currently used, so don't use it. */ 6724 return (false); 6725 } 6726 } 6727 return (!sctp_is_in_timewait(tag, lport, rport, (uint32_t)now->tv_sec)); 6728 } 6729 6730 static void 6731 sctp_drain_mbufs(struct sctp_tcb *stcb) 6732 { 6733 /* 6734 * We must hunt this association for MBUF's past the cumack (i.e. 6735 * out of order data that we can renege on). 6736 */ 6737 struct sctp_association *asoc; 6738 struct sctp_tmit_chunk *chk, *nchk; 6739 uint32_t cumulative_tsn_p1; 6740 struct sctp_queued_to_read *control, *ncontrol; 6741 int cnt, strmat; 6742 uint32_t gap, i; 6743 int fnd = 0; 6744 6745 /* We look for anything larger than the cum-ack + 1 */ 6746 6747 asoc = &stcb->asoc; 6748 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6749 /* none we can reneg on. */ 6750 return; 6751 } 6752 SCTP_STAT_INCR(sctps_protocol_drains_done); 6753 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6754 cnt = 0; 6755 /* Ok that was fun, now we will drain all the inbound streams? */ 6756 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6757 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6758 #ifdef INVARIANTS 6759 if (control->on_strm_q != SCTP_ON_ORDERED) { 6760 panic("Huh control: %p on_q: %d -- not ordered?", 6761 control, control->on_strm_q); 6762 } 6763 #endif 6764 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6765 /* Yep it is above cum-ack */ 6766 cnt++; 6767 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6768 KASSERT(control->length > 0, ("control has zero length")); 6769 if (asoc->size_on_all_streams >= control->length) { 6770 asoc->size_on_all_streams -= control->length; 6771 } else { 6772 #ifdef INVARIANTS 6773 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6774 #else 6775 asoc->size_on_all_streams = 0; 6776 #endif 6777 } 6778 sctp_ucount_decr(asoc->cnt_on_all_streams); 6779 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6780 if (control->on_read_q) { 6781 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6782 control->on_read_q = 0; 6783 } 6784 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6785 control->on_strm_q = 0; 6786 if (control->data) { 6787 sctp_m_freem(control->data); 6788 control->data = NULL; 6789 } 6790 sctp_free_remote_addr(control->whoFrom); 6791 /* Now its reasm? */ 6792 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6793 cnt++; 6794 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6795 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6796 if (asoc->size_on_reasm_queue >= chk->send_size) { 6797 asoc->size_on_reasm_queue -= chk->send_size; 6798 } else { 6799 #ifdef INVARIANTS 6800 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6801 #else 6802 asoc->size_on_reasm_queue = 0; 6803 #endif 6804 } 6805 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6806 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6807 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6808 if (chk->data) { 6809 sctp_m_freem(chk->data); 6810 chk->data = NULL; 6811 } 6812 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6813 } 6814 sctp_free_a_readq(stcb, control); 6815 } 6816 } 6817 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6818 #ifdef INVARIANTS 6819 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6820 panic("Huh control: %p on_q: %d -- not unordered?", 6821 control, control->on_strm_q); 6822 } 6823 #endif 6824 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6825 /* Yep it is above cum-ack */ 6826 cnt++; 6827 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6828 KASSERT(control->length > 0, ("control has zero length")); 6829 if (asoc->size_on_all_streams >= control->length) { 6830 asoc->size_on_all_streams -= control->length; 6831 } else { 6832 #ifdef INVARIANTS 6833 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6834 #else 6835 asoc->size_on_all_streams = 0; 6836 #endif 6837 } 6838 sctp_ucount_decr(asoc->cnt_on_all_streams); 6839 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6840 if (control->on_read_q) { 6841 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6842 control->on_read_q = 0; 6843 } 6844 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6845 control->on_strm_q = 0; 6846 if (control->data) { 6847 sctp_m_freem(control->data); 6848 control->data = NULL; 6849 } 6850 sctp_free_remote_addr(control->whoFrom); 6851 /* Now its reasm? */ 6852 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6853 cnt++; 6854 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6855 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6856 if (asoc->size_on_reasm_queue >= chk->send_size) { 6857 asoc->size_on_reasm_queue -= chk->send_size; 6858 } else { 6859 #ifdef INVARIANTS 6860 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6861 #else 6862 asoc->size_on_reasm_queue = 0; 6863 #endif 6864 } 6865 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6866 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6867 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6868 if (chk->data) { 6869 sctp_m_freem(chk->data); 6870 chk->data = NULL; 6871 } 6872 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6873 } 6874 sctp_free_a_readq(stcb, control); 6875 } 6876 } 6877 } 6878 if (cnt) { 6879 /* We must back down to see what the new highest is */ 6880 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6881 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6882 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6883 asoc->highest_tsn_inside_map = i; 6884 fnd = 1; 6885 break; 6886 } 6887 } 6888 if (!fnd) { 6889 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6890 } 6891 6892 /* 6893 * Question, should we go through the delivery queue? The 6894 * only reason things are on here is the app not reading OR 6895 * a p-d-api up. An attacker COULD send enough in to 6896 * initiate the PD-API and then send a bunch of stuff to 6897 * other streams... these would wind up on the delivery 6898 * queue.. and then we would not get to them. But in order 6899 * to do this I then have to back-track and un-deliver 6900 * sequence numbers in streams.. el-yucko. I think for now 6901 * we will NOT look at the delivery queue and leave it to be 6902 * something to consider later. An alternative would be to 6903 * abort the P-D-API with a notification and then deliver 6904 * the data.... Or another method might be to keep track of 6905 * how many times the situation occurs and if we see a 6906 * possible attack underway just abort the association. 6907 */ 6908 #ifdef SCTP_DEBUG 6909 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6910 #endif 6911 /* 6912 * Now do we need to find a new 6913 * asoc->highest_tsn_inside_map? 6914 */ 6915 asoc->last_revoke_count = cnt; 6916 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6917 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6918 /* sa_ignore NO_NULL_CHK */ 6919 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6920 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6921 } 6922 /* 6923 * Another issue, in un-setting the TSN's in the mapping array we 6924 * DID NOT adjust the highest_tsn marker. This will cause one of 6925 * two things to occur. It may cause us to do extra work in checking 6926 * for our mapping array movement. More importantly it may cause us 6927 * to SACK every datagram. This may not be a bad thing though since 6928 * we will recover once we get our cum-ack above and all this stuff 6929 * we dumped recovered. 6930 */ 6931 } 6932 6933 void 6934 sctp_drain() 6935 { 6936 /* 6937 * We must walk the PCB lists for ALL associations here. The system 6938 * is LOW on MBUF's and needs help. This is where reneging will 6939 * occur. We really hope this does NOT happen! 6940 */ 6941 VNET_ITERATOR_DECL(vnet_iter); 6942 VNET_LIST_RLOCK_NOSLEEP(); 6943 VNET_FOREACH(vnet_iter) { 6944 CURVNET_SET(vnet_iter); 6945 struct sctp_inpcb *inp; 6946 struct sctp_tcb *stcb; 6947 6948 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6949 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6950 #ifdef VIMAGE 6951 continue; 6952 #else 6953 return; 6954 #endif 6955 } 6956 SCTP_INP_INFO_RLOCK(); 6957 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6958 /* For each endpoint */ 6959 SCTP_INP_RLOCK(inp); 6960 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6961 /* For each association */ 6962 SCTP_TCB_LOCK(stcb); 6963 sctp_drain_mbufs(stcb); 6964 SCTP_TCB_UNLOCK(stcb); 6965 } 6966 SCTP_INP_RUNLOCK(inp); 6967 } 6968 SCTP_INP_INFO_RUNLOCK(); 6969 CURVNET_RESTORE(); 6970 } 6971 VNET_LIST_RUNLOCK_NOSLEEP(); 6972 } 6973 6974 /* 6975 * start a new iterator 6976 * iterates through all endpoints and associations based on the pcb_state 6977 * flags and asoc_state. "af" (mandatory) is executed for all matching 6978 * assocs and "ef" (optional) is executed when the iterator completes. 6979 * "inpf" (optional) is executed for each new endpoint as it is being 6980 * iterated through. inpe (optional) is called when the inp completes 6981 * its way through all the stcbs. 6982 */ 6983 int 6984 sctp_initiate_iterator(inp_func inpf, 6985 asoc_func af, 6986 inp_func inpe, 6987 uint32_t pcb_state, 6988 uint32_t pcb_features, 6989 uint32_t asoc_state, 6990 void *argp, 6991 uint32_t argi, 6992 end_func ef, 6993 struct sctp_inpcb *s_inp, 6994 uint8_t chunk_output_off) 6995 { 6996 struct sctp_iterator *it = NULL; 6997 6998 if (af == NULL) { 6999 return (-1); 7000 } 7001 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7002 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7003 SCTP_BASE_VAR(sctp_pcb_initialized)); 7004 return (-1); 7005 } 7006 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7007 SCTP_M_ITER); 7008 if (it == NULL) { 7009 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7010 return (-1); 7011 } 7012 memset(it, 0, sizeof(*it)); 7013 it->function_assoc = af; 7014 it->function_inp = inpf; 7015 if (inpf) 7016 it->done_current_ep = 0; 7017 else 7018 it->done_current_ep = 1; 7019 it->function_atend = ef; 7020 it->pointer = argp; 7021 it->val = argi; 7022 it->pcb_flags = pcb_state; 7023 it->pcb_features = pcb_features; 7024 it->asoc_state = asoc_state; 7025 it->function_inp_end = inpe; 7026 it->no_chunk_output = chunk_output_off; 7027 it->vn = curvnet; 7028 if (s_inp) { 7029 /* Assume lock is held here */ 7030 it->inp = s_inp; 7031 SCTP_INP_INCR_REF(it->inp); 7032 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7033 } else { 7034 SCTP_INP_INFO_RLOCK(); 7035 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7036 if (it->inp) { 7037 SCTP_INP_INCR_REF(it->inp); 7038 } 7039 SCTP_INP_INFO_RUNLOCK(); 7040 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7041 } 7042 SCTP_IPI_ITERATOR_WQ_LOCK(); 7043 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7044 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7045 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7046 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7047 SCTP_FREE(it, SCTP_M_ITER); 7048 return (-1); 7049 } 7050 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7051 if (sctp_it_ctl.iterator_running == 0) { 7052 sctp_wakeup_iterator(); 7053 } 7054 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7055 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7056 return (0); 7057 } 7058