Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/netinet/sctp_pcb.c
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <sys/proc.h> 40 #include <netinet/sctp_var.h> 41 #include <netinet/sctp_sysctl.h> 42 #include <netinet/sctp_pcb.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp.h> 45 #include <netinet/sctp_header.h> 46 #include <netinet/sctp_asconf.h> 47 #include <netinet/sctp_output.h> 48 #include <netinet/sctp_timer.h> 49 #include <netinet/sctp_bsd_addr.h> 50 #if defined(INET) || defined(INET6) 51 #include <netinet/udp.h> 52 #endif 53 #ifdef INET6 54 #include <netinet6/ip6_var.h> 55 #endif 56 #include <sys/sched.h> 57 #include <sys/smp.h> 58 #include <sys/unistd.h> 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 #endif 79 80 void 81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 82 { 83 /* 84 * We really don't need to lock this, but I will just because it 85 * does not hurt. 86 */ 87 SCTP_INP_INFO_RLOCK(); 88 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 89 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 90 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 91 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 92 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 93 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 94 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 95 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 96 SCTP_INP_INFO_RUNLOCK(); 97 } 98 99 /*- 100 * Addresses are added to VRF's (Virtual Router's). For BSD we 101 * have only the default VRF 0. We maintain a hash list of 102 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 103 * these has a list of addresses. When we add a new address 104 * to a VRF we lookup the ifn/ifn_index, if the ifn does 105 * not exist we create it and add it to the list of IFN's 106 * within the VRF. Once we have the sctp_ifn, we add the 107 * address to the list. So we look something like: 108 * 109 * hash-vrf-table 110 * vrf-> ifn-> ifn -> ifn 111 * vrf | 112 * ... +--ifa-> ifa -> ifa 113 * vrf 114 * 115 * We keep these separate lists since the SCTP subsystem will 116 * point to these from its source address selection nets structure. 117 * When an address is deleted it does not happen right away on 118 * the SCTP side, it gets scheduled. What we do when a 119 * delete happens is immediately remove the address from 120 * the master list and decrement the refcount. As our 121 * addip iterator works through and frees the src address 122 * selection pointing to the sctp_ifa, eventually the refcount 123 * will reach 0 and we will delete it. Note that it is assumed 124 * that any locking on system level ifn/ifa is done at the 125 * caller of these functions and these routines will only 126 * lock the SCTP structures as they add or delete things. 127 * 128 * Other notes on VRF concepts. 129 * - An endpoint can be in multiple VRF's 130 * - An association lives within a VRF and only one VRF. 131 * - Any incoming packet we can deduce the VRF for by 132 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 133 * - Any downward send call or connect call must supply the 134 * VRF via ancillary data or via some sort of set default 135 * VRF socket option call (again for BSD no brainer since 136 * the VRF is always 0). 137 * - An endpoint may add multiple VRF's to it. 138 * - Listening sockets can accept associations in any 139 * of the VRF's they are in but the assoc will end up 140 * in only one VRF (gotten from the packet or connect/send). 141 * 142 */ 143 144 struct sctp_vrf * 145 sctp_allocate_vrf(int vrf_id) 146 { 147 struct sctp_vrf *vrf = NULL; 148 struct sctp_vrflist *bucket; 149 150 /* First allocate the VRF structure */ 151 vrf = sctp_find_vrf(vrf_id); 152 if (vrf) { 153 /* Already allocated */ 154 return (vrf); 155 } 156 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 157 SCTP_M_VRF); 158 if (vrf == NULL) { 159 /* No memory */ 160 #ifdef INVARIANTS 161 panic("No memory for VRF:%d", vrf_id); 162 #endif 163 return (NULL); 164 } 165 /* setup the VRF */ 166 memset(vrf, 0, sizeof(struct sctp_vrf)); 167 vrf->vrf_id = vrf_id; 168 LIST_INIT(&vrf->ifnlist); 169 vrf->total_ifa_count = 0; 170 vrf->refcount = 0; 171 /* now also setup table ids */ 172 SCTP_INIT_VRF_TABLEID(vrf); 173 /* Init the HASH of addresses */ 174 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 175 &vrf->vrf_addr_hashmark); 176 if (vrf->vrf_addr_hash == NULL) { 177 /* No memory */ 178 #ifdef INVARIANTS 179 panic("No memory for VRF:%d", vrf_id); 180 #endif 181 SCTP_FREE(vrf, SCTP_M_VRF); 182 return (NULL); 183 } 184 185 /* Add it to the hash table */ 186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 187 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 189 return (vrf); 190 } 191 192 struct sctp_ifn * 193 sctp_find_ifn(void *ifn, uint32_t ifn_index) 194 { 195 struct sctp_ifn *sctp_ifnp; 196 struct sctp_ifnlist *hash_ifn_head; 197 198 /* 199 * We assume the lock is held for the addresses if that's wrong 200 * problems could occur :-) 201 */ 202 SCTP_IPI_ADDR_LOCK_ASSERT(); 203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 205 if (sctp_ifnp->ifn_index == ifn_index) { 206 return (sctp_ifnp); 207 } 208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 209 return (sctp_ifnp); 210 } 211 } 212 return (NULL); 213 } 214 215 struct sctp_vrf * 216 sctp_find_vrf(uint32_t vrf_id) 217 { 218 struct sctp_vrflist *bucket; 219 struct sctp_vrf *liste; 220 221 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 222 LIST_FOREACH(liste, bucket, next_vrf) { 223 if (vrf_id == liste->vrf_id) { 224 return (liste); 225 } 226 } 227 return (NULL); 228 } 229 230 void 231 sctp_free_vrf(struct sctp_vrf *vrf) 232 { 233 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 234 if (vrf->vrf_addr_hash) { 235 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 236 vrf->vrf_addr_hash = NULL; 237 } 238 /* We zero'd the count */ 239 LIST_REMOVE(vrf, next_vrf); 240 SCTP_FREE(vrf, SCTP_M_VRF); 241 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 242 } 243 } 244 245 void 246 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 247 { 248 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 249 /* We zero'd the count */ 250 if (sctp_ifnp->vrf) { 251 sctp_free_vrf(sctp_ifnp->vrf); 252 } 253 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 254 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 255 } 256 } 257 258 void 259 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 260 { 261 struct sctp_ifn *sctp_ifnp; 262 263 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 264 if (sctp_ifnp != NULL) { 265 sctp_ifnp->ifn_mtu = mtu; 266 } 267 } 268 269 void 270 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 271 { 272 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 273 /* We zero'd the count */ 274 if (sctp_ifap->ifn_p) { 275 sctp_free_ifn(sctp_ifap->ifn_p); 276 } 277 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 278 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 279 } 280 } 281 282 static void 283 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 284 { 285 struct sctp_ifn *found; 286 287 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 288 if (found == NULL) { 289 /* Not in the list.. sorry */ 290 return; 291 } 292 if (hold_addr_lock == 0) { 293 SCTP_IPI_ADDR_WLOCK(); 294 } else { 295 SCTP_IPI_ADDR_WLOCK_ASSERT(); 296 } 297 LIST_REMOVE(sctp_ifnp, next_bucket); 298 LIST_REMOVE(sctp_ifnp, next_ifn); 299 if (hold_addr_lock == 0) { 300 SCTP_IPI_ADDR_WUNLOCK(); 301 } 302 /* Take away the reference, and possibly free it */ 303 sctp_free_ifn(sctp_ifnp); 304 } 305 306 void 307 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 308 const char *if_name, uint32_t ifn_index) 309 { 310 struct sctp_vrf *vrf; 311 struct sctp_ifa *sctp_ifap; 312 313 SCTP_IPI_ADDR_RLOCK(); 314 vrf = sctp_find_vrf(vrf_id); 315 if (vrf == NULL) { 316 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 317 goto out; 318 } 319 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 320 if (sctp_ifap == NULL) { 321 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 322 goto out; 323 } 324 if (sctp_ifap->ifn_p == NULL) { 325 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 326 goto out; 327 } 328 if (if_name) { 329 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 331 sctp_ifap->ifn_p->ifn_name, if_name); 332 goto out; 333 } 334 } else { 335 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 337 sctp_ifap->ifn_p->ifn_index, ifn_index); 338 goto out; 339 } 340 } 341 342 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 343 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 344 out: 345 SCTP_IPI_ADDR_RUNLOCK(); 346 } 347 348 void 349 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 350 const char *if_name, uint32_t ifn_index) 351 { 352 struct sctp_vrf *vrf; 353 struct sctp_ifa *sctp_ifap; 354 355 SCTP_IPI_ADDR_RLOCK(); 356 vrf = sctp_find_vrf(vrf_id); 357 if (vrf == NULL) { 358 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 359 goto out; 360 } 361 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 362 if (sctp_ifap == NULL) { 363 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 364 goto out; 365 } 366 if (sctp_ifap->ifn_p == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 368 goto out; 369 } 370 if (if_name) { 371 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 372 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 373 sctp_ifap->ifn_p->ifn_name, if_name); 374 goto out; 375 } 376 } else { 377 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 379 sctp_ifap->ifn_p->ifn_index, ifn_index); 380 goto out; 381 } 382 } 383 384 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 385 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 386 out: 387 SCTP_IPI_ADDR_RUNLOCK(); 388 } 389 390 /*- 391 * Add an ifa to an ifn. 392 * Register the interface as necessary. 393 * NOTE: ADDR write lock MUST be held. 394 */ 395 static void 396 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 397 { 398 int ifa_af; 399 400 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 401 sctp_ifap->ifn_p = sctp_ifnp; 402 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 403 /* update address counts */ 404 sctp_ifnp->ifa_count++; 405 ifa_af = sctp_ifap->address.sa.sa_family; 406 switch (ifa_af) { 407 #ifdef INET 408 case AF_INET: 409 sctp_ifnp->num_v4++; 410 break; 411 #endif 412 #ifdef INET6 413 case AF_INET6: 414 sctp_ifnp->num_v6++; 415 break; 416 #endif 417 default: 418 break; 419 } 420 if (sctp_ifnp->ifa_count == 1) { 421 /* register the new interface */ 422 sctp_ifnp->registered_af = ifa_af; 423 } 424 } 425 426 /*- 427 * Remove an ifa from its ifn. 428 * If no more addresses exist, remove the ifn too. Otherwise, re-register 429 * the interface based on the remaining address families left. 430 * NOTE: ADDR write lock MUST be held. 431 */ 432 static void 433 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 434 { 435 LIST_REMOVE(sctp_ifap, next_ifa); 436 if (sctp_ifap->ifn_p) { 437 /* update address counts */ 438 sctp_ifap->ifn_p->ifa_count--; 439 switch (sctp_ifap->address.sa.sa_family) { 440 #ifdef INET 441 case AF_INET: 442 sctp_ifap->ifn_p->num_v4--; 443 break; 444 #endif 445 #ifdef INET6 446 case AF_INET6: 447 sctp_ifap->ifn_p->num_v6--; 448 break; 449 #endif 450 default: 451 break; 452 } 453 454 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 455 /* remove the ifn, possibly freeing it */ 456 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 457 } else { 458 /* re-register address family type, if needed */ 459 if ((sctp_ifap->ifn_p->num_v6 == 0) && 460 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 461 sctp_ifap->ifn_p->registered_af = AF_INET; 462 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 463 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 464 sctp_ifap->ifn_p->registered_af = AF_INET6; 465 } 466 /* free the ifn refcount */ 467 sctp_free_ifn(sctp_ifap->ifn_p); 468 } 469 sctp_ifap->ifn_p = NULL; 470 } 471 } 472 473 struct sctp_ifa * 474 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 475 uint32_t ifn_type, const char *if_name, void *ifa, 476 struct sockaddr *addr, uint32_t ifa_flags, 477 int dynamic_add) 478 { 479 struct sctp_vrf *vrf; 480 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp; 481 struct sctp_ifa *sctp_ifap, *new_sctp_ifap; 482 struct sctp_ifalist *hash_addr_head; 483 struct sctp_ifnlist *hash_ifn_head; 484 uint32_t hash_of_addr; 485 int new_ifn_af = 0; 486 487 #ifdef SCTP_DEBUG 488 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 489 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 490 #endif 491 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *, 492 sizeof(struct sctp_ifn), SCTP_M_IFN); 493 if (new_sctp_ifnp == NULL) { 494 #ifdef INVARIANTS 495 panic("No memory for IFN"); 496 #endif 497 return (NULL); 498 } 499 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 500 if (new_sctp_ifap == NULL) { 501 #ifdef INVARIANTS 502 panic("No memory for IFA"); 503 #endif 504 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 505 return (NULL); 506 } 507 508 SCTP_IPI_ADDR_WLOCK(); 509 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 510 if (sctp_ifnp) { 511 vrf = sctp_ifnp->vrf; 512 } else { 513 vrf = sctp_find_vrf(vrf_id); 514 if (vrf == NULL) { 515 vrf = sctp_allocate_vrf(vrf_id); 516 if (vrf == NULL) { 517 SCTP_IPI_ADDR_WUNLOCK(); 518 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 519 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 520 return (NULL); 521 } 522 } 523 } 524 if (sctp_ifnp == NULL) { 525 /* 526 * build one and add it, can't hold lock until after malloc 527 * done though. 528 */ 529 sctp_ifnp = new_sctp_ifnp; 530 new_sctp_ifnp = NULL; 531 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 532 sctp_ifnp->ifn_index = ifn_index; 533 sctp_ifnp->ifn_p = ifn; 534 sctp_ifnp->ifn_type = ifn_type; 535 sctp_ifnp->refcount = 0; 536 sctp_ifnp->vrf = vrf; 537 atomic_add_int(&vrf->refcount, 1); 538 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index); 539 if (if_name != NULL) { 540 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 541 } else { 542 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 543 } 544 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 545 LIST_INIT(&sctp_ifnp->ifalist); 546 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 547 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 548 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 549 new_ifn_af = 1; 550 } 551 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 552 if (sctp_ifap) { 553 /* Hmm, it already exists? */ 554 if ((sctp_ifap->ifn_p) && 555 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 556 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 557 sctp_ifap->ifn_p->ifn_name, ifn_index, 558 (void *)sctp_ifap); 559 if (new_ifn_af) { 560 /* Remove the created one that we don't want */ 561 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 562 } 563 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 564 /* easy to solve, just switch back to active */ 565 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 566 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 567 sctp_ifap->ifn_p = sctp_ifnp; 568 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 569 } 570 exit_stage_left: 571 SCTP_IPI_ADDR_WUNLOCK(); 572 if (new_sctp_ifnp != NULL) { 573 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 574 } 575 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); 576 return (sctp_ifap); 577 } else { 578 if (sctp_ifap->ifn_p) { 579 /* 580 * The last IFN gets the address, remove the 581 * old one 582 */ 583 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 584 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 585 sctp_ifap->ifn_p->ifn_index, if_name, 586 ifn_index); 587 /* remove the address from the old ifn */ 588 sctp_remove_ifa_from_ifn(sctp_ifap); 589 /* move the address over to the new ifn */ 590 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 591 goto exit_stage_left; 592 } else { 593 /* repair ifnp which was NULL ? */ 594 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 595 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 596 (void *)sctp_ifnp, (void *)sctp_ifap); 597 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 598 } 599 goto exit_stage_left; 600 } 601 } 602 sctp_ifap = new_sctp_ifap; 603 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 604 sctp_ifap->ifn_p = sctp_ifnp; 605 atomic_add_int(&sctp_ifnp->refcount, 1); 606 sctp_ifap->vrf_id = vrf_id; 607 sctp_ifap->ifa = ifa; 608 memcpy(&sctp_ifap->address, addr, addr->sa_len); 609 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 610 sctp_ifap->flags = ifa_flags; 611 /* Set scope */ 612 switch (sctp_ifap->address.sa.sa_family) { 613 #ifdef INET 614 case AF_INET: 615 { 616 struct sockaddr_in *sin; 617 618 sin = &sctp_ifap->address.sin; 619 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 620 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 621 sctp_ifap->src_is_loop = 1; 622 } 623 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 624 sctp_ifap->src_is_priv = 1; 625 } 626 sctp_ifnp->num_v4++; 627 if (new_ifn_af) 628 new_ifn_af = AF_INET; 629 break; 630 } 631 #endif 632 #ifdef INET6 633 case AF_INET6: 634 { 635 /* ok to use deprecated addresses? */ 636 struct sockaddr_in6 *sin6; 637 638 sin6 = &sctp_ifap->address.sin6; 639 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 640 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 641 sctp_ifap->src_is_loop = 1; 642 } 643 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 644 sctp_ifap->src_is_priv = 1; 645 } 646 sctp_ifnp->num_v6++; 647 if (new_ifn_af) 648 new_ifn_af = AF_INET6; 649 break; 650 } 651 #endif 652 default: 653 new_ifn_af = 0; 654 break; 655 } 656 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 657 658 if ((sctp_ifap->src_is_priv == 0) && 659 (sctp_ifap->src_is_loop == 0)) { 660 sctp_ifap->src_is_glob = 1; 661 } 662 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 663 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 664 sctp_ifap->refcount = 1; 665 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 666 sctp_ifnp->ifa_count++; 667 vrf->total_ifa_count++; 668 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 669 if (new_ifn_af) { 670 sctp_ifnp->registered_af = new_ifn_af; 671 } 672 SCTP_IPI_ADDR_WUNLOCK(); 673 if (new_sctp_ifnp != NULL) { 674 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); 675 } 676 677 if (dynamic_add) { 678 /* 679 * Bump up the refcount so that when the timer completes it 680 * will drop back down. 681 */ 682 struct sctp_laddr *wi; 683 684 atomic_add_int(&sctp_ifap->refcount, 1); 685 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 686 if (wi == NULL) { 687 /* 688 * Gak, what can we do? We have lost an address 689 * change can you say HOSED? 690 */ 691 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 692 /* Opps, must decrement the count */ 693 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 694 if_name); 695 return (NULL); 696 } 697 SCTP_INCR_LADDR_COUNT(); 698 memset(wi, 0, sizeof(*wi)); 699 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 700 wi->ifa = sctp_ifap; 701 wi->action = SCTP_ADD_IP_ADDRESS; 702 703 SCTP_WQ_ADDR_LOCK(); 704 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 705 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 706 (struct sctp_inpcb *)NULL, 707 (struct sctp_tcb *)NULL, 708 (struct sctp_nets *)NULL); 709 SCTP_WQ_ADDR_UNLOCK(); 710 } else { 711 /* it's ready for use */ 712 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 713 } 714 return (sctp_ifap); 715 } 716 717 void 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 719 uint32_t ifn_index, const char *if_name) 720 { 721 struct sctp_vrf *vrf; 722 struct sctp_ifa *sctp_ifap = NULL; 723 724 SCTP_IPI_ADDR_WLOCK(); 725 vrf = sctp_find_vrf(vrf_id); 726 if (vrf == NULL) { 727 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 728 goto out_now; 729 } 730 731 #ifdef SCTP_DEBUG 732 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 733 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 734 #endif 735 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 736 if (sctp_ifap) { 737 /* Validate the delete */ 738 if (sctp_ifap->ifn_p) { 739 int valid = 0; 740 741 /*- 742 * The name has priority over the ifn_index 743 * if its given. 744 */ 745 if (if_name) { 746 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 747 /* They match its a correct delete */ 748 valid = 1; 749 } 750 } 751 if (!valid) { 752 /* last ditch check ifn_index */ 753 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 754 valid = 1; 755 } 756 } 757 if (!valid) { 758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 759 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 760 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 761 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 762 SCTP_IPI_ADDR_WUNLOCK(); 763 return; 764 } 765 } 766 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 767 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 768 /* 769 * We don't set the flag. This means that the structure will 770 * hang around in EP's that have bound specific to it until 771 * they close. This gives us TCP like behavior if someone 772 * removes an address (or for that matter adds it right 773 * back). 774 */ 775 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 776 vrf->total_ifa_count--; 777 LIST_REMOVE(sctp_ifap, next_bucket); 778 sctp_remove_ifa_from_ifn(sctp_ifap); 779 } 780 #ifdef SCTP_DEBUG 781 else { 782 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 783 ifn_index); 784 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 785 } 786 #endif 787 788 out_now: 789 SCTP_IPI_ADDR_WUNLOCK(); 790 if (sctp_ifap) { 791 struct sctp_laddr *wi; 792 793 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 794 if (wi == NULL) { 795 /* 796 * Gak, what can we do? We have lost an address 797 * change can you say HOSED? 798 */ 799 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 800 801 /* Oops, must decrement the count */ 802 sctp_free_ifa(sctp_ifap); 803 return; 804 } 805 SCTP_INCR_LADDR_COUNT(); 806 memset(wi, 0, sizeof(*wi)); 807 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 808 wi->ifa = sctp_ifap; 809 wi->action = SCTP_DEL_IP_ADDRESS; 810 SCTP_WQ_ADDR_LOCK(); 811 /* 812 * Should this really be a tailq? As it is we will process 813 * the newest first :-0 814 */ 815 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 816 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 817 (struct sctp_inpcb *)NULL, 818 (struct sctp_tcb *)NULL, 819 (struct sctp_nets *)NULL); 820 SCTP_WQ_ADDR_UNLOCK(); 821 } 822 return; 823 } 824 825 static int 826 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 827 { 828 int loopback_scope; 829 #if defined(INET) 830 int ipv4_local_scope, ipv4_addr_legal; 831 #endif 832 #if defined(INET6) 833 int local_scope, site_scope, ipv6_addr_legal; 834 #endif 835 struct sctp_vrf *vrf; 836 struct sctp_ifn *sctp_ifn; 837 struct sctp_ifa *sctp_ifa; 838 839 loopback_scope = stcb->asoc.scope.loopback_scope; 840 #if defined(INET) 841 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 842 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 843 #endif 844 #if defined(INET6) 845 local_scope = stcb->asoc.scope.local_scope; 846 site_scope = stcb->asoc.scope.site_scope; 847 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 848 #endif 849 850 SCTP_IPI_ADDR_RLOCK(); 851 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 852 if (vrf == NULL) { 853 /* no vrf, no addresses */ 854 SCTP_IPI_ADDR_RUNLOCK(); 855 return (0); 856 } 857 858 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 859 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 860 if ((loopback_scope == 0) && 861 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 862 continue; 863 } 864 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 865 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 866 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 867 /* 868 * We allow pending addresses, where 869 * we have sent an asconf-add to be 870 * considered valid. 871 */ 872 continue; 873 } 874 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 875 continue; 876 } 877 switch (sctp_ifa->address.sa.sa_family) { 878 #ifdef INET 879 case AF_INET: 880 if (ipv4_addr_legal) { 881 struct sockaddr_in *sin, 882 *rsin; 883 884 sin = &sctp_ifa->address.sin; 885 rsin = (struct sockaddr_in *)to; 886 if ((ipv4_local_scope == 0) && 887 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 888 continue; 889 } 890 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 891 &sin->sin_addr) != 0) { 892 continue; 893 } 894 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 895 SCTP_IPI_ADDR_RUNLOCK(); 896 return (1); 897 } 898 } 899 break; 900 #endif 901 #ifdef INET6 902 case AF_INET6: 903 if (ipv6_addr_legal) { 904 struct sockaddr_in6 *sin6, 905 *rsin6; 906 907 sin6 = &sctp_ifa->address.sin6; 908 rsin6 = (struct sockaddr_in6 *)to; 909 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 910 &sin6->sin6_addr) != 0) { 911 continue; 912 } 913 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 914 if (local_scope == 0) 915 continue; 916 if (sin6->sin6_scope_id == 0) { 917 if (sa6_recoverscope(sin6) != 0) 918 continue; 919 } 920 } 921 if ((site_scope == 0) && 922 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 923 continue; 924 } 925 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 926 SCTP_IPI_ADDR_RUNLOCK(); 927 return (1); 928 } 929 } 930 break; 931 #endif 932 default: 933 /* TSNH */ 934 break; 935 } 936 } 937 } 938 } else { 939 struct sctp_laddr *laddr; 940 941 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 942 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 943 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 944 continue; 945 } 946 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 947 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 948 /* 949 * We allow pending addresses, where we have 950 * sent an asconf-add to be considered 951 * valid. 952 */ 953 continue; 954 } 955 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 956 continue; 957 } 958 switch (to->sa_family) { 959 #ifdef INET 960 case AF_INET: 961 { 962 struct sockaddr_in *sin, *rsin; 963 964 sin = &laddr->ifa->address.sin; 965 rsin = (struct sockaddr_in *)to; 966 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 967 SCTP_IPI_ADDR_RUNLOCK(); 968 return (1); 969 } 970 break; 971 } 972 #endif 973 #ifdef INET6 974 case AF_INET6: 975 { 976 struct sockaddr_in6 *sin6, *rsin6; 977 978 sin6 = &laddr->ifa->address.sin6; 979 rsin6 = (struct sockaddr_in6 *)to; 980 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 981 SCTP_IPI_ADDR_RUNLOCK(); 982 return (1); 983 } 984 break; 985 } 986 987 #endif 988 default: 989 /* TSNH */ 990 break; 991 } 992 } 993 } 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (0); 996 } 997 998 static struct sctp_tcb * 999 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1000 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1001 { 1002 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1003 /* 1004 * If we support the TCP model, then we must now dig through to see 1005 * if we can find our endpoint in the list of tcp ep's. 1006 */ 1007 uint16_t lport, rport; 1008 struct sctppcbhead *ephead; 1009 struct sctp_inpcb *inp; 1010 struct sctp_laddr *laddr; 1011 struct sctp_tcb *stcb; 1012 struct sctp_nets *net; 1013 1014 if ((to == NULL) || (from == NULL)) { 1015 return (NULL); 1016 } 1017 1018 switch (to->sa_family) { 1019 #ifdef INET 1020 case AF_INET: 1021 if (from->sa_family == AF_INET) { 1022 lport = ((struct sockaddr_in *)to)->sin_port; 1023 rport = ((struct sockaddr_in *)from)->sin_port; 1024 } else { 1025 return (NULL); 1026 } 1027 break; 1028 #endif 1029 #ifdef INET6 1030 case AF_INET6: 1031 if (from->sa_family == AF_INET6) { 1032 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1033 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1034 } else { 1035 return (NULL); 1036 } 1037 break; 1038 #endif 1039 default: 1040 return (NULL); 1041 } 1042 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1043 /* 1044 * Ok now for each of the guys in this bucket we must look and see: 1045 * - Does the remote port match. - Does there single association's 1046 * addresses match this address (to). If so we update p_ep to point 1047 * to this ep and return the tcb from it. 1048 */ 1049 LIST_FOREACH(inp, ephead, sctp_hash) { 1050 SCTP_INP_RLOCK(inp); 1051 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1052 SCTP_INP_RUNLOCK(inp); 1053 continue; 1054 } 1055 if (lport != inp->sctp_lport) { 1056 SCTP_INP_RUNLOCK(inp); 1057 continue; 1058 } 1059 switch (to->sa_family) { 1060 #ifdef INET 1061 case AF_INET: 1062 { 1063 struct sockaddr_in *sin; 1064 1065 sin = (struct sockaddr_in *)to; 1066 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1067 &sin->sin_addr) != 0) { 1068 SCTP_INP_RUNLOCK(inp); 1069 continue; 1070 } 1071 break; 1072 } 1073 #endif 1074 #ifdef INET6 1075 case AF_INET6: 1076 { 1077 struct sockaddr_in6 *sin6; 1078 1079 sin6 = (struct sockaddr_in6 *)to; 1080 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1081 &sin6->sin6_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 default: 1089 SCTP_INP_RUNLOCK(inp); 1090 continue; 1091 } 1092 if (inp->def_vrf_id != vrf_id) { 1093 SCTP_INP_RUNLOCK(inp); 1094 continue; 1095 } 1096 /* check to see if the ep has one of the addresses */ 1097 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1098 /* We are NOT bound all, so look further */ 1099 int match = 0; 1100 1101 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1102 if (laddr->ifa == NULL) { 1103 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1104 continue; 1105 } 1106 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1107 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1108 continue; 1109 } 1110 if (laddr->ifa->address.sa.sa_family == 1111 to->sa_family) { 1112 /* see if it matches */ 1113 #ifdef INET 1114 if (from->sa_family == AF_INET) { 1115 struct sockaddr_in *intf_addr, 1116 *sin; 1117 1118 intf_addr = &laddr->ifa->address.sin; 1119 sin = (struct sockaddr_in *)to; 1120 if (sin->sin_addr.s_addr == 1121 intf_addr->sin_addr.s_addr) { 1122 match = 1; 1123 break; 1124 } 1125 } 1126 #endif 1127 #ifdef INET6 1128 if (from->sa_family == AF_INET6) { 1129 struct sockaddr_in6 *intf_addr6; 1130 struct sockaddr_in6 *sin6; 1131 1132 sin6 = (struct sockaddr_in6 *) 1133 to; 1134 intf_addr6 = &laddr->ifa->address.sin6; 1135 1136 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1137 intf_addr6)) { 1138 match = 1; 1139 break; 1140 } 1141 } 1142 #endif 1143 } 1144 } 1145 if (match == 0) { 1146 /* This endpoint does not have this address */ 1147 SCTP_INP_RUNLOCK(inp); 1148 continue; 1149 } 1150 } 1151 /* 1152 * Ok if we hit here the ep has the address, does it hold 1153 * the tcb? 1154 */ 1155 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1156 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1157 if (stcb == NULL) { 1158 SCTP_INP_RUNLOCK(inp); 1159 continue; 1160 } 1161 SCTP_TCB_LOCK(stcb); 1162 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1163 SCTP_TCB_UNLOCK(stcb); 1164 SCTP_INP_RUNLOCK(inp); 1165 continue; 1166 } 1167 if (stcb->rport != rport) { 1168 /* remote port does not match. */ 1169 SCTP_TCB_UNLOCK(stcb); 1170 SCTP_INP_RUNLOCK(inp); 1171 continue; 1172 } 1173 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1174 SCTP_TCB_UNLOCK(stcb); 1175 SCTP_INP_RUNLOCK(inp); 1176 continue; 1177 } 1178 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1179 SCTP_TCB_UNLOCK(stcb); 1180 SCTP_INP_RUNLOCK(inp); 1181 continue; 1182 } 1183 /* Does this TCB have a matching address? */ 1184 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1185 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1186 /* not the same family, can't be a match */ 1187 continue; 1188 } 1189 switch (from->sa_family) { 1190 #ifdef INET 1191 case AF_INET: 1192 { 1193 struct sockaddr_in *sin, *rsin; 1194 1195 sin = (struct sockaddr_in *)&net->ro._l_addr; 1196 rsin = (struct sockaddr_in *)from; 1197 if (sin->sin_addr.s_addr == 1198 rsin->sin_addr.s_addr) { 1199 /* found it */ 1200 if (netp != NULL) { 1201 *netp = net; 1202 } 1203 /* 1204 * Update the endpoint 1205 * pointer 1206 */ 1207 *inp_p = inp; 1208 SCTP_INP_RUNLOCK(inp); 1209 return (stcb); 1210 } 1211 break; 1212 } 1213 #endif 1214 #ifdef INET6 1215 case AF_INET6: 1216 { 1217 struct sockaddr_in6 *sin6, *rsin6; 1218 1219 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1220 rsin6 = (struct sockaddr_in6 *)from; 1221 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1222 rsin6)) { 1223 /* found it */ 1224 if (netp != NULL) { 1225 *netp = net; 1226 } 1227 /* 1228 * Update the endpoint 1229 * pointer 1230 */ 1231 *inp_p = inp; 1232 SCTP_INP_RUNLOCK(inp); 1233 return (stcb); 1234 } 1235 break; 1236 } 1237 #endif 1238 default: 1239 /* TSNH */ 1240 break; 1241 } 1242 } 1243 SCTP_TCB_UNLOCK(stcb); 1244 SCTP_INP_RUNLOCK(inp); 1245 } 1246 return (NULL); 1247 } 1248 1249 /* 1250 * rules for use 1251 * 1252 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1253 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1254 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1255 * NULL. 1256 */ 1257 1258 struct sctp_tcb * 1259 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1260 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1261 { 1262 struct sctpasochead *head; 1263 struct sctp_inpcb *inp; 1264 struct sctp_tcb *stcb = NULL; 1265 struct sctp_nets *net; 1266 uint16_t rport; 1267 1268 inp = *inp_p; 1269 switch (remote->sa_family) { 1270 #ifdef INET 1271 case AF_INET: 1272 rport = (((struct sockaddr_in *)remote)->sin_port); 1273 break; 1274 #endif 1275 #ifdef INET6 1276 case AF_INET6: 1277 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1278 break; 1279 #endif 1280 default: 1281 return (NULL); 1282 } 1283 if (locked_tcb) { 1284 /* 1285 * UN-lock so we can do proper locking here this occurs when 1286 * called from load_addresses_from_init. 1287 */ 1288 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1289 SCTP_TCB_UNLOCK(locked_tcb); 1290 } 1291 SCTP_INP_INFO_RLOCK(); 1292 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1293 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1294 /*- 1295 * Now either this guy is our listener or it's the 1296 * connector. If it is the one that issued the connect, then 1297 * it's only chance is to be the first TCB in the list. If 1298 * it is the acceptor, then do the special_lookup to hash 1299 * and find the real inp. 1300 */ 1301 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1302 /* to is peer addr, from is my addr */ 1303 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1304 netp, inp->def_vrf_id); 1305 if ((stcb != NULL) && (locked_tcb == NULL)) { 1306 /* we have a locked tcb, lower refcount */ 1307 SCTP_INP_DECR_REF(inp); 1308 } 1309 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1310 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1311 SCTP_TCB_LOCK(locked_tcb); 1312 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1313 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1314 } 1315 SCTP_INP_INFO_RUNLOCK(); 1316 return (stcb); 1317 } else { 1318 SCTP_INP_WLOCK(inp); 1319 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1320 goto null_return; 1321 } 1322 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1323 if (stcb == NULL) { 1324 goto null_return; 1325 } 1326 SCTP_TCB_LOCK(stcb); 1327 1328 if (stcb->rport != rport) { 1329 /* remote port does not match. */ 1330 SCTP_TCB_UNLOCK(stcb); 1331 goto null_return; 1332 } 1333 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1334 SCTP_TCB_UNLOCK(stcb); 1335 goto null_return; 1336 } 1337 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1338 SCTP_TCB_UNLOCK(stcb); 1339 goto null_return; 1340 } 1341 /* now look at the list of remote addresses */ 1342 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1343 #ifdef INVARIANTS 1344 if (net == (TAILQ_NEXT(net, sctp_next))) { 1345 panic("Corrupt net list"); 1346 } 1347 #endif 1348 if (net->ro._l_addr.sa.sa_family != 1349 remote->sa_family) { 1350 /* not the same family */ 1351 continue; 1352 } 1353 switch (remote->sa_family) { 1354 #ifdef INET 1355 case AF_INET: 1356 { 1357 struct sockaddr_in *sin, 1358 *rsin; 1359 1360 sin = (struct sockaddr_in *) 1361 &net->ro._l_addr; 1362 rsin = (struct sockaddr_in *)remote; 1363 if (sin->sin_addr.s_addr == 1364 rsin->sin_addr.s_addr) { 1365 /* found it */ 1366 if (netp != NULL) { 1367 *netp = net; 1368 } 1369 if (locked_tcb == NULL) { 1370 SCTP_INP_DECR_REF(inp); 1371 } else if (locked_tcb != stcb) { 1372 SCTP_TCB_LOCK(locked_tcb); 1373 } 1374 if (locked_tcb) { 1375 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1376 } 1377 1378 SCTP_INP_WUNLOCK(inp); 1379 SCTP_INP_INFO_RUNLOCK(); 1380 return (stcb); 1381 } 1382 break; 1383 } 1384 #endif 1385 #ifdef INET6 1386 case AF_INET6: 1387 { 1388 struct sockaddr_in6 *sin6, 1389 *rsin6; 1390 1391 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1392 rsin6 = (struct sockaddr_in6 *)remote; 1393 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1394 rsin6)) { 1395 /* found it */ 1396 if (netp != NULL) { 1397 *netp = net; 1398 } 1399 if (locked_tcb == NULL) { 1400 SCTP_INP_DECR_REF(inp); 1401 } else if (locked_tcb != stcb) { 1402 SCTP_TCB_LOCK(locked_tcb); 1403 } 1404 if (locked_tcb) { 1405 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1406 } 1407 SCTP_INP_WUNLOCK(inp); 1408 SCTP_INP_INFO_RUNLOCK(); 1409 return (stcb); 1410 } 1411 break; 1412 } 1413 #endif 1414 default: 1415 /* TSNH */ 1416 break; 1417 } 1418 } 1419 SCTP_TCB_UNLOCK(stcb); 1420 } 1421 } else { 1422 SCTP_INP_WLOCK(inp); 1423 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1424 goto null_return; 1425 } 1426 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1427 inp->sctp_hashmark)]; 1428 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1429 if (stcb->rport != rport) { 1430 /* remote port does not match */ 1431 continue; 1432 } 1433 SCTP_TCB_LOCK(stcb); 1434 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1435 SCTP_TCB_UNLOCK(stcb); 1436 continue; 1437 } 1438 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1439 SCTP_TCB_UNLOCK(stcb); 1440 continue; 1441 } 1442 /* now look at the list of remote addresses */ 1443 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1444 #ifdef INVARIANTS 1445 if (net == (TAILQ_NEXT(net, sctp_next))) { 1446 panic("Corrupt net list"); 1447 } 1448 #endif 1449 if (net->ro._l_addr.sa.sa_family != 1450 remote->sa_family) { 1451 /* not the same family */ 1452 continue; 1453 } 1454 switch (remote->sa_family) { 1455 #ifdef INET 1456 case AF_INET: 1457 { 1458 struct sockaddr_in *sin, 1459 *rsin; 1460 1461 sin = (struct sockaddr_in *) 1462 &net->ro._l_addr; 1463 rsin = (struct sockaddr_in *)remote; 1464 if (sin->sin_addr.s_addr == 1465 rsin->sin_addr.s_addr) { 1466 /* found it */ 1467 if (netp != NULL) { 1468 *netp = net; 1469 } 1470 if (locked_tcb == NULL) { 1471 SCTP_INP_DECR_REF(inp); 1472 } else if (locked_tcb != stcb) { 1473 SCTP_TCB_LOCK(locked_tcb); 1474 } 1475 if (locked_tcb) { 1476 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1477 } 1478 SCTP_INP_WUNLOCK(inp); 1479 SCTP_INP_INFO_RUNLOCK(); 1480 return (stcb); 1481 } 1482 break; 1483 } 1484 #endif 1485 #ifdef INET6 1486 case AF_INET6: 1487 { 1488 struct sockaddr_in6 *sin6, 1489 *rsin6; 1490 1491 sin6 = (struct sockaddr_in6 *) 1492 &net->ro._l_addr; 1493 rsin6 = (struct sockaddr_in6 *)remote; 1494 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1495 rsin6)) { 1496 /* found it */ 1497 if (netp != NULL) { 1498 *netp = net; 1499 } 1500 if (locked_tcb == NULL) { 1501 SCTP_INP_DECR_REF(inp); 1502 } else if (locked_tcb != stcb) { 1503 SCTP_TCB_LOCK(locked_tcb); 1504 } 1505 if (locked_tcb) { 1506 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1507 } 1508 SCTP_INP_WUNLOCK(inp); 1509 SCTP_INP_INFO_RUNLOCK(); 1510 return (stcb); 1511 } 1512 break; 1513 } 1514 #endif 1515 default: 1516 /* TSNH */ 1517 break; 1518 } 1519 } 1520 SCTP_TCB_UNLOCK(stcb); 1521 } 1522 } 1523 null_return: 1524 /* clean up for returning null */ 1525 if (locked_tcb) { 1526 SCTP_TCB_LOCK(locked_tcb); 1527 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1528 } 1529 SCTP_INP_WUNLOCK(inp); 1530 SCTP_INP_INFO_RUNLOCK(); 1531 /* not found */ 1532 return (NULL); 1533 } 1534 1535 /* 1536 * Find an association for a specific endpoint using the association id given 1537 * out in the COMM_UP notification 1538 */ 1539 struct sctp_tcb * 1540 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1541 { 1542 /* 1543 * Use my the assoc_id to find a endpoint 1544 */ 1545 struct sctpasochead *head; 1546 struct sctp_tcb *stcb; 1547 uint32_t id; 1548 1549 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1550 SCTP_PRINTF("TSNH ep_associd0\n"); 1551 return (NULL); 1552 } 1553 id = (uint32_t)asoc_id; 1554 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1555 if (head == NULL) { 1556 /* invalid id TSNH */ 1557 SCTP_PRINTF("TSNH ep_associd1\n"); 1558 return (NULL); 1559 } 1560 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1561 if (stcb->asoc.assoc_id == id) { 1562 if (inp != stcb->sctp_ep) { 1563 /* 1564 * some other guy has the same id active (id 1565 * collision ??). 1566 */ 1567 SCTP_PRINTF("TSNH ep_associd2\n"); 1568 continue; 1569 } 1570 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1571 continue; 1572 } 1573 if (want_lock) { 1574 SCTP_TCB_LOCK(stcb); 1575 } 1576 return (stcb); 1577 } 1578 } 1579 return (NULL); 1580 } 1581 1582 struct sctp_tcb * 1583 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1584 { 1585 struct sctp_tcb *stcb; 1586 1587 SCTP_INP_RLOCK(inp); 1588 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1589 SCTP_INP_RUNLOCK(inp); 1590 return (stcb); 1591 } 1592 1593 /* 1594 * Endpoint probe expects that the INP_INFO is locked. 1595 */ 1596 static struct sctp_inpcb * 1597 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1598 uint16_t lport, uint32_t vrf_id) 1599 { 1600 struct sctp_inpcb *inp; 1601 struct sctp_laddr *laddr; 1602 #ifdef INET 1603 struct sockaddr_in *sin; 1604 #endif 1605 #ifdef INET6 1606 struct sockaddr_in6 *sin6; 1607 struct sockaddr_in6 *intf_addr6; 1608 #endif 1609 int fnd; 1610 1611 #ifdef INET 1612 sin = NULL; 1613 #endif 1614 #ifdef INET6 1615 sin6 = NULL; 1616 #endif 1617 switch (nam->sa_family) { 1618 #ifdef INET 1619 case AF_INET: 1620 sin = (struct sockaddr_in *)nam; 1621 break; 1622 #endif 1623 #ifdef INET6 1624 case AF_INET6: 1625 sin6 = (struct sockaddr_in6 *)nam; 1626 break; 1627 #endif 1628 default: 1629 /* unsupported family */ 1630 return (NULL); 1631 } 1632 1633 if (head == NULL) 1634 return (NULL); 1635 1636 LIST_FOREACH(inp, head, sctp_hash) { 1637 SCTP_INP_RLOCK(inp); 1638 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1639 SCTP_INP_RUNLOCK(inp); 1640 continue; 1641 } 1642 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1643 (inp->sctp_lport == lport)) { 1644 /* got it */ 1645 switch (nam->sa_family) { 1646 #ifdef INET 1647 case AF_INET: 1648 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1649 SCTP_IPV6_V6ONLY(inp)) { 1650 /* 1651 * IPv4 on a IPv6 socket with ONLY 1652 * IPv6 set 1653 */ 1654 SCTP_INP_RUNLOCK(inp); 1655 continue; 1656 } 1657 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1658 &sin->sin_addr) != 0) { 1659 SCTP_INP_RUNLOCK(inp); 1660 continue; 1661 } 1662 break; 1663 #endif 1664 #ifdef INET6 1665 case AF_INET6: 1666 /* 1667 * A V6 address and the endpoint is NOT 1668 * bound V6 1669 */ 1670 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1671 SCTP_INP_RUNLOCK(inp); 1672 continue; 1673 } 1674 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1675 &sin6->sin6_addr) != 0) { 1676 SCTP_INP_RUNLOCK(inp); 1677 continue; 1678 } 1679 break; 1680 #endif 1681 default: 1682 break; 1683 } 1684 /* does a VRF id match? */ 1685 fnd = 0; 1686 if (inp->def_vrf_id == vrf_id) 1687 fnd = 1; 1688 1689 SCTP_INP_RUNLOCK(inp); 1690 if (!fnd) 1691 continue; 1692 return (inp); 1693 } 1694 SCTP_INP_RUNLOCK(inp); 1695 } 1696 switch (nam->sa_family) { 1697 #ifdef INET 1698 case AF_INET: 1699 if (sin->sin_addr.s_addr == INADDR_ANY) { 1700 /* Can't hunt for one that has no address specified */ 1701 return (NULL); 1702 } 1703 break; 1704 #endif 1705 #ifdef INET6 1706 case AF_INET6: 1707 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1708 /* Can't hunt for one that has no address specified */ 1709 return (NULL); 1710 } 1711 break; 1712 #endif 1713 default: 1714 break; 1715 } 1716 /* 1717 * ok, not bound to all so see if we can find a EP bound to this 1718 * address. 1719 */ 1720 LIST_FOREACH(inp, head, sctp_hash) { 1721 SCTP_INP_RLOCK(inp); 1722 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1723 SCTP_INP_RUNLOCK(inp); 1724 continue; 1725 } 1726 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1727 SCTP_INP_RUNLOCK(inp); 1728 continue; 1729 } 1730 /* 1731 * Ok this could be a likely candidate, look at all of its 1732 * addresses 1733 */ 1734 if (inp->sctp_lport != lport) { 1735 SCTP_INP_RUNLOCK(inp); 1736 continue; 1737 } 1738 /* does a VRF id match? */ 1739 fnd = 0; 1740 if (inp->def_vrf_id == vrf_id) 1741 fnd = 1; 1742 1743 if (!fnd) { 1744 SCTP_INP_RUNLOCK(inp); 1745 continue; 1746 } 1747 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1748 if (laddr->ifa == NULL) { 1749 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1750 __func__); 1751 continue; 1752 } 1753 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1754 (void *)laddr->ifa); 1755 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1756 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1757 continue; 1758 } 1759 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1760 /* possible, see if it matches */ 1761 switch (nam->sa_family) { 1762 #ifdef INET 1763 case AF_INET: 1764 if (sin->sin_addr.s_addr == 1765 laddr->ifa->address.sin.sin_addr.s_addr) { 1766 SCTP_INP_RUNLOCK(inp); 1767 return (inp); 1768 } 1769 break; 1770 #endif 1771 #ifdef INET6 1772 case AF_INET6: 1773 intf_addr6 = &laddr->ifa->address.sin6; 1774 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1775 intf_addr6)) { 1776 SCTP_INP_RUNLOCK(inp); 1777 return (inp); 1778 } 1779 break; 1780 #endif 1781 } 1782 } 1783 } 1784 SCTP_INP_RUNLOCK(inp); 1785 } 1786 return (NULL); 1787 } 1788 1789 static struct sctp_inpcb * 1790 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1791 { 1792 struct sctppcbhead *head; 1793 struct sctp_inpcb *t_inp; 1794 int fnd; 1795 1796 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1797 SCTP_BASE_INFO(hashmark))]; 1798 LIST_FOREACH(t_inp, head, sctp_hash) { 1799 if (t_inp->sctp_lport != lport) { 1800 continue; 1801 } 1802 /* is it in the VRF in question */ 1803 fnd = 0; 1804 if (t_inp->def_vrf_id == vrf_id) 1805 fnd = 1; 1806 if (!fnd) 1807 continue; 1808 1809 /* This one is in use. */ 1810 /* check the v6/v4 binding issue */ 1811 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1812 SCTP_IPV6_V6ONLY(t_inp)) { 1813 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1814 /* collision in V6 space */ 1815 return (t_inp); 1816 } else { 1817 /* inp is BOUND_V4 no conflict */ 1818 continue; 1819 } 1820 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1821 /* t_inp is bound v4 and v6, conflict always */ 1822 return (t_inp); 1823 } else { 1824 /* t_inp is bound only V4 */ 1825 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1826 SCTP_IPV6_V6ONLY(inp)) { 1827 /* no conflict */ 1828 continue; 1829 } 1830 /* else fall through to conflict */ 1831 } 1832 return (t_inp); 1833 } 1834 return (NULL); 1835 } 1836 1837 int 1838 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1839 { 1840 /* For 1-2-1 with port reuse */ 1841 struct sctppcbhead *head; 1842 struct sctp_inpcb *tinp, *ninp; 1843 1844 SCTP_INP_INFO_WLOCK_ASSERT(); 1845 SCTP_INP_WLOCK_ASSERT(inp); 1846 1847 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1848 /* only works with port reuse on */ 1849 return (-1); 1850 } 1851 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1852 return (0); 1853 } 1854 SCTP_INP_WUNLOCK(inp); 1855 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1856 SCTP_BASE_INFO(hashmark))]; 1857 /* Kick out all non-listeners to the TCP hash */ 1858 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1859 if (tinp->sctp_lport != inp->sctp_lport) { 1860 continue; 1861 } 1862 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1863 continue; 1864 } 1865 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1866 continue; 1867 } 1868 if (SCTP_IS_LISTENING(tinp)) { 1869 continue; 1870 } 1871 SCTP_INP_WLOCK(tinp); 1872 LIST_REMOVE(tinp, sctp_hash); 1873 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1874 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1875 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1876 SCTP_INP_WUNLOCK(tinp); 1877 } 1878 SCTP_INP_WLOCK(inp); 1879 /* Pull from where he was */ 1880 LIST_REMOVE(inp, sctp_hash); 1881 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1882 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1883 LIST_INSERT_HEAD(head, inp, sctp_hash); 1884 return (0); 1885 } 1886 1887 struct sctp_inpcb * 1888 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1889 uint32_t vrf_id) 1890 { 1891 /* 1892 * First we check the hash table to see if someone has this port 1893 * bound with just the port. 1894 */ 1895 struct sctp_inpcb *inp; 1896 struct sctppcbhead *head; 1897 int lport; 1898 unsigned int i; 1899 #ifdef INET 1900 struct sockaddr_in *sin; 1901 #endif 1902 #ifdef INET6 1903 struct sockaddr_in6 *sin6; 1904 #endif 1905 1906 switch (nam->sa_family) { 1907 #ifdef INET 1908 case AF_INET: 1909 sin = (struct sockaddr_in *)nam; 1910 lport = sin->sin_port; 1911 break; 1912 #endif 1913 #ifdef INET6 1914 case AF_INET6: 1915 sin6 = (struct sockaddr_in6 *)nam; 1916 lport = sin6->sin6_port; 1917 break; 1918 #endif 1919 default: 1920 return (NULL); 1921 } 1922 /* 1923 * I could cheat here and just cast to one of the types but we will 1924 * do it right. It also provides the check against an Unsupported 1925 * type too. 1926 */ 1927 /* Find the head of the ALLADDR chain */ 1928 if (have_lock == 0) { 1929 SCTP_INP_INFO_RLOCK(); 1930 } 1931 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1932 SCTP_BASE_INFO(hashmark))]; 1933 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1934 1935 /* 1936 * If the TCP model exists it could be that the main listening 1937 * endpoint is gone but there still exists a connected socket for 1938 * this guy. If so we can return the first one that we find. This 1939 * may NOT be the correct one so the caller should be wary on the 1940 * returned INP. Currently the only caller that sets find_tcp_pool 1941 * is in bindx where we are verifying that a user CAN bind the 1942 * address. He either has bound it already, or someone else has, or 1943 * its open to bind, so this is good enough. 1944 */ 1945 if (inp == NULL && find_tcp_pool) { 1946 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1947 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1948 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1949 if (inp) { 1950 break; 1951 } 1952 } 1953 } 1954 if (inp) { 1955 SCTP_INP_INCR_REF(inp); 1956 } 1957 if (have_lock == 0) { 1958 SCTP_INP_INFO_RUNLOCK(); 1959 } 1960 return (inp); 1961 } 1962 1963 /* 1964 * Find an association for an endpoint with the pointer to whom you want to 1965 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1966 * need to change the *to to some other struct like a mbuf... 1967 */ 1968 struct sctp_tcb * 1969 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1970 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1971 uint32_t vrf_id) 1972 { 1973 struct sctp_inpcb *inp = NULL; 1974 struct sctp_tcb *stcb; 1975 1976 SCTP_INP_INFO_RLOCK(); 1977 if (find_tcp_pool) { 1978 if (inp_p != NULL) { 1979 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1980 vrf_id); 1981 } else { 1982 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1983 vrf_id); 1984 } 1985 if (stcb != NULL) { 1986 SCTP_INP_INFO_RUNLOCK(); 1987 return (stcb); 1988 } 1989 } 1990 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1991 if (inp_p != NULL) { 1992 *inp_p = inp; 1993 } 1994 SCTP_INP_INFO_RUNLOCK(); 1995 if (inp == NULL) { 1996 return (NULL); 1997 } 1998 /* 1999 * ok, we have an endpoint, now lets find the assoc for it (if any) 2000 * we now place the source address or from in the to of the find 2001 * endpoint call. Since in reality this chain is used from the 2002 * inbound packet side. 2003 */ 2004 if (inp_p != NULL) { 2005 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2006 NULL); 2007 } else { 2008 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2009 NULL); 2010 } 2011 return (stcb); 2012 } 2013 2014 /* 2015 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2016 * find all addresses that the sender has specified in any address list. Each 2017 * address will be used to lookup the TCB and see if one exits. 2018 */ 2019 static struct sctp_tcb * 2020 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2021 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2022 struct sockaddr *dst) 2023 { 2024 struct sctp_paramhdr *phdr, param_buf; 2025 #if defined(INET) || defined(INET6) 2026 struct sctp_tcb *stcb; 2027 uint16_t ptype; 2028 #endif 2029 uint16_t plen; 2030 #ifdef INET 2031 struct sockaddr_in sin4; 2032 #endif 2033 #ifdef INET6 2034 struct sockaddr_in6 sin6; 2035 #endif 2036 2037 #ifdef INET 2038 memset(&sin4, 0, sizeof(sin4)); 2039 sin4.sin_len = sizeof(sin4); 2040 sin4.sin_family = AF_INET; 2041 sin4.sin_port = sh->src_port; 2042 #endif 2043 #ifdef INET6 2044 memset(&sin6, 0, sizeof(sin6)); 2045 sin6.sin6_len = sizeof(sin6); 2046 sin6.sin6_family = AF_INET6; 2047 sin6.sin6_port = sh->src_port; 2048 #endif 2049 2050 offset += sizeof(struct sctp_init_chunk); 2051 2052 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2053 while (phdr != NULL) { 2054 /* now we must see if we want the parameter */ 2055 #if defined(INET) || defined(INET6) 2056 ptype = ntohs(phdr->param_type); 2057 #endif 2058 plen = ntohs(phdr->param_length); 2059 if (plen == 0) { 2060 break; 2061 } 2062 #ifdef INET 2063 if (ptype == SCTP_IPV4_ADDRESS && 2064 plen == sizeof(struct sctp_ipv4addr_param)) { 2065 /* Get the rest of the address */ 2066 struct sctp_ipv4addr_param ip4_param, *p4; 2067 2068 phdr = sctp_get_next_param(m, offset, 2069 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2070 if (phdr == NULL) { 2071 return (NULL); 2072 } 2073 p4 = (struct sctp_ipv4addr_param *)phdr; 2074 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2075 /* look it up */ 2076 stcb = sctp_findassociation_ep_addr(inp_p, 2077 (struct sockaddr *)&sin4, netp, dst, NULL); 2078 if (stcb != NULL) { 2079 return (stcb); 2080 } 2081 } 2082 #endif 2083 #ifdef INET6 2084 if (ptype == SCTP_IPV6_ADDRESS && 2085 plen == sizeof(struct sctp_ipv6addr_param)) { 2086 /* Get the rest of the address */ 2087 struct sctp_ipv6addr_param ip6_param, *p6; 2088 2089 phdr = sctp_get_next_param(m, offset, 2090 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2091 if (phdr == NULL) { 2092 return (NULL); 2093 } 2094 p6 = (struct sctp_ipv6addr_param *)phdr; 2095 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2096 /* look it up */ 2097 stcb = sctp_findassociation_ep_addr(inp_p, 2098 (struct sockaddr *)&sin6, netp, dst, NULL); 2099 if (stcb != NULL) { 2100 return (stcb); 2101 } 2102 } 2103 #endif 2104 offset += SCTP_SIZE32(plen); 2105 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2106 sizeof(param_buf)); 2107 } 2108 return (NULL); 2109 } 2110 2111 static struct sctp_tcb * 2112 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2113 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2114 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2115 { 2116 /* 2117 * Use my vtag to hash. If we find it we then verify the source addr 2118 * is in the assoc. If all goes well we save a bit on rec of a 2119 * packet. 2120 */ 2121 struct sctpasochead *head; 2122 struct sctp_nets *net; 2123 struct sctp_tcb *stcb; 2124 2125 SCTP_INP_INFO_RLOCK(); 2126 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2127 SCTP_BASE_INFO(hashasocmark))]; 2128 LIST_FOREACH(stcb, head, sctp_asocs) { 2129 SCTP_INP_RLOCK(stcb->sctp_ep); 2130 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2131 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2132 continue; 2133 } 2134 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2135 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2136 continue; 2137 } 2138 SCTP_TCB_LOCK(stcb); 2139 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2140 if (stcb->asoc.my_vtag == vtag) { 2141 /* candidate */ 2142 if (stcb->rport != rport) { 2143 SCTP_TCB_UNLOCK(stcb); 2144 continue; 2145 } 2146 if (stcb->sctp_ep->sctp_lport != lport) { 2147 SCTP_TCB_UNLOCK(stcb); 2148 continue; 2149 } 2150 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2151 SCTP_TCB_UNLOCK(stcb); 2152 continue; 2153 } 2154 /* RRS:Need toaddr check here */ 2155 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2156 /* Endpoint does not own this address */ 2157 SCTP_TCB_UNLOCK(stcb); 2158 continue; 2159 } 2160 if (remote_tag) { 2161 /* 2162 * If we have both vtags that's all we match 2163 * on 2164 */ 2165 if (stcb->asoc.peer_vtag == remote_tag) { 2166 /* 2167 * If both tags match we consider it 2168 * conclusive and check NO 2169 * source/destination addresses 2170 */ 2171 goto conclusive; 2172 } 2173 } 2174 if (skip_src_check) { 2175 conclusive: 2176 if (from) { 2177 *netp = sctp_findnet(stcb, from); 2178 } else { 2179 *netp = NULL; /* unknown */ 2180 } 2181 if (inp_p) 2182 *inp_p = stcb->sctp_ep; 2183 SCTP_INP_INFO_RUNLOCK(); 2184 return (stcb); 2185 } 2186 net = sctp_findnet(stcb, from); 2187 if (net) { 2188 /* yep its him. */ 2189 *netp = net; 2190 SCTP_STAT_INCR(sctps_vtagexpress); 2191 *inp_p = stcb->sctp_ep; 2192 SCTP_INP_INFO_RUNLOCK(); 2193 return (stcb); 2194 } else { 2195 /* 2196 * not him, this should only happen in rare 2197 * cases so I peg it. 2198 */ 2199 SCTP_STAT_INCR(sctps_vtagbogus); 2200 } 2201 } 2202 SCTP_TCB_UNLOCK(stcb); 2203 } 2204 SCTP_INP_INFO_RUNLOCK(); 2205 return (NULL); 2206 } 2207 2208 /* 2209 * Find an association with the pointer to the inbound IP packet. This can be 2210 * a IPv4 or IPv6 packet. 2211 */ 2212 struct sctp_tcb * 2213 sctp_findassociation_addr(struct mbuf *m, int offset, 2214 struct sockaddr *src, struct sockaddr *dst, 2215 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2216 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2217 { 2218 struct sctp_tcb *stcb; 2219 struct sctp_inpcb *inp; 2220 2221 if (sh->v_tag) { 2222 /* we only go down this path if vtag is non-zero */ 2223 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2224 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2225 if (stcb) { 2226 return (stcb); 2227 } 2228 } 2229 2230 if (inp_p) { 2231 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2232 1, vrf_id); 2233 inp = *inp_p; 2234 } else { 2235 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2236 1, vrf_id); 2237 } 2238 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2239 if (stcb == NULL && inp) { 2240 /* Found a EP but not this address */ 2241 if ((ch->chunk_type == SCTP_INITIATION) || 2242 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2243 /*- 2244 * special hook, we do NOT return linp or an 2245 * association that is linked to an existing 2246 * association that is under the TCP pool (i.e. no 2247 * listener exists). The endpoint finding routine 2248 * will always find a listener before examining the 2249 * TCP pool. 2250 */ 2251 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2252 if (inp_p) { 2253 *inp_p = NULL; 2254 } 2255 return (NULL); 2256 } 2257 stcb = sctp_findassociation_special_addr(m, 2258 offset, sh, &inp, netp, dst); 2259 if (inp_p != NULL) { 2260 *inp_p = inp; 2261 } 2262 } 2263 } 2264 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2265 return (stcb); 2266 } 2267 2268 /* 2269 * lookup an association by an ASCONF lookup address. 2270 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2271 */ 2272 struct sctp_tcb * 2273 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2274 struct sockaddr *dst, struct sctphdr *sh, 2275 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2276 { 2277 struct sctp_tcb *stcb; 2278 union sctp_sockstore remote_store; 2279 struct sctp_paramhdr param_buf, *phdr; 2280 int ptype; 2281 int zero_address = 0; 2282 #ifdef INET 2283 struct sockaddr_in *sin; 2284 #endif 2285 #ifdef INET6 2286 struct sockaddr_in6 *sin6; 2287 #endif 2288 2289 memset(&remote_store, 0, sizeof(remote_store)); 2290 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2291 ¶m_buf, sizeof(struct sctp_paramhdr)); 2292 if (phdr == NULL) { 2293 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2294 __func__); 2295 return NULL; 2296 } 2297 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2298 /* get the correlation address */ 2299 switch (ptype) { 2300 #ifdef INET6 2301 case SCTP_IPV6_ADDRESS: 2302 { 2303 /* ipv6 address param */ 2304 struct sctp_ipv6addr_param *p6, p6_buf; 2305 2306 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2307 return NULL; 2308 } 2309 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2310 offset + sizeof(struct sctp_asconf_chunk), 2311 &p6_buf.ph, sizeof(p6_buf)); 2312 if (p6 == NULL) { 2313 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2314 __func__); 2315 return (NULL); 2316 } 2317 sin6 = &remote_store.sin6; 2318 sin6->sin6_family = AF_INET6; 2319 sin6->sin6_len = sizeof(*sin6); 2320 sin6->sin6_port = sh->src_port; 2321 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2322 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2323 zero_address = 1; 2324 break; 2325 } 2326 #endif 2327 #ifdef INET 2328 case SCTP_IPV4_ADDRESS: 2329 { 2330 /* ipv4 address param */ 2331 struct sctp_ipv4addr_param *p4, p4_buf; 2332 2333 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2334 return NULL; 2335 } 2336 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2337 offset + sizeof(struct sctp_asconf_chunk), 2338 &p4_buf.ph, sizeof(p4_buf)); 2339 if (p4 == NULL) { 2340 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2341 __func__); 2342 return (NULL); 2343 } 2344 sin = &remote_store.sin; 2345 sin->sin_family = AF_INET; 2346 sin->sin_len = sizeof(*sin); 2347 sin->sin_port = sh->src_port; 2348 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2349 if (sin->sin_addr.s_addr == INADDR_ANY) 2350 zero_address = 1; 2351 break; 2352 } 2353 #endif 2354 default: 2355 /* invalid address param type */ 2356 return NULL; 2357 } 2358 2359 if (zero_address) { 2360 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2361 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2362 if (stcb != NULL) { 2363 SCTP_INP_DECR_REF(*inp_p); 2364 } 2365 } else { 2366 stcb = sctp_findassociation_ep_addr(inp_p, 2367 &remote_store.sa, netp, 2368 dst, NULL); 2369 } 2370 return (stcb); 2371 } 2372 2373 /* 2374 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2375 * addresses. This way if we don't get a bind we by default pick a ephemeral 2376 * port with all addresses bound. 2377 */ 2378 int 2379 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2380 { 2381 /* 2382 * we get called when a new endpoint starts up. We need to allocate 2383 * the sctp_inpcb structure from the zone and init it. Mark it as 2384 * unbound and find a port that we can use as an ephemeral with 2385 * INADDR_ANY. If the user binds later no problem we can then add in 2386 * the specific addresses. And setup the default parameters for the 2387 * EP. 2388 */ 2389 int i, error; 2390 struct sctp_inpcb *inp; 2391 struct sctp_pcb *m; 2392 struct timeval time; 2393 sctp_sharedkey_t *null_key; 2394 2395 error = 0; 2396 2397 SCTP_INP_INFO_WLOCK(); 2398 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2399 if (inp == NULL) { 2400 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2401 SCTP_INP_INFO_WUNLOCK(); 2402 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2403 return (ENOBUFS); 2404 } 2405 /* zap it */ 2406 memset(inp, 0, sizeof(*inp)); 2407 2408 /* bump generations */ 2409 /* setup socket pointers */ 2410 inp->sctp_socket = so; 2411 inp->ip_inp.inp.inp_socket = so; 2412 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2413 #ifdef INET6 2414 if (INP_SOCKAF(so) == AF_INET6) { 2415 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2416 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2417 } 2418 if (MODULE_GLOBAL(ip6_v6only)) { 2419 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2420 } 2421 } 2422 #endif 2423 inp->sctp_associd_counter = 1; 2424 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2425 inp->sctp_frag_point = 0; 2426 inp->max_cwnd = 0; 2427 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2428 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2429 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2430 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2431 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2432 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2433 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2434 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2435 inp->idata_supported = 0; 2436 2437 inp->fibnum = so->so_fibnum; 2438 /* init the small hash table we use to track asocid <-> tcb */ 2439 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2440 if (inp->sctp_asocidhash == NULL) { 2441 crfree(inp->ip_inp.inp.inp_cred); 2442 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2443 SCTP_INP_INFO_WUNLOCK(); 2444 return (ENOBUFS); 2445 } 2446 SCTP_INCR_EP_COUNT(); 2447 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2448 SCTP_INP_INFO_WUNLOCK(); 2449 2450 so->so_pcb = (caddr_t)inp; 2451 2452 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2453 /* UDP style socket */ 2454 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2455 SCTP_PCB_FLAGS_UNBOUND); 2456 /* Be sure it is NON-BLOCKING IO for UDP */ 2457 /* SCTP_SET_SO_NBIO(so); */ 2458 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2459 /* TCP style socket */ 2460 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2461 SCTP_PCB_FLAGS_UNBOUND); 2462 /* Be sure we have blocking IO by default */ 2463 SOCK_LOCK(so); 2464 SCTP_CLEAR_SO_NBIO(so); 2465 SOCK_UNLOCK(so); 2466 } else { 2467 /* 2468 * unsupported socket type (RAW, etc)- in case we missed it 2469 * in protosw 2470 */ 2471 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2472 so->so_pcb = NULL; 2473 crfree(inp->ip_inp.inp.inp_cred); 2474 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2475 return (EOPNOTSUPP); 2476 } 2477 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2478 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2479 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2480 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2481 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2482 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2483 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2484 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2485 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2486 } 2487 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2488 &inp->sctp_hashmark); 2489 if (inp->sctp_tcbhash == NULL) { 2490 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2491 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2492 so->so_pcb = NULL; 2493 crfree(inp->ip_inp.inp.inp_cred); 2494 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2495 return (ENOBUFS); 2496 } 2497 inp->def_vrf_id = vrf_id; 2498 2499 SCTP_INP_INFO_WLOCK(); 2500 SCTP_INP_LOCK_INIT(inp); 2501 rw_init_flags(&inp->ip_inp.inp.inp_lock, "sctpinp", 2502 RW_RECURSE | RW_DUPOK); 2503 SCTP_INP_READ_INIT(inp); 2504 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2505 /* lock the new ep */ 2506 SCTP_INP_WLOCK(inp); 2507 2508 /* add it to the info area */ 2509 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2510 SCTP_INP_INFO_WUNLOCK(); 2511 2512 TAILQ_INIT(&inp->read_queue); 2513 LIST_INIT(&inp->sctp_addr_list); 2514 2515 LIST_INIT(&inp->sctp_asoc_list); 2516 2517 #ifdef SCTP_TRACK_FREED_ASOCS 2518 /* TEMP CODE */ 2519 LIST_INIT(&inp->sctp_asoc_free_list); 2520 #endif 2521 /* Init the timer structure for signature change */ 2522 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2523 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2524 2525 /* now init the actual endpoint default data */ 2526 m = &inp->sctp_ep; 2527 2528 /* setup the base timeout information */ 2529 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2530 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2531 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2532 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2533 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2534 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2535 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2536 /* all max/min max are in ms */ 2537 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2538 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2539 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2540 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2541 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2542 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2543 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2544 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2545 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2546 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2547 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2548 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2549 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2550 2551 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2552 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2553 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2554 /* number of streams to pre-open on a association */ 2555 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2556 2557 m->default_mtu = 0; 2558 /* Add adaptation cookie */ 2559 m->adaptation_layer_indicator = 0; 2560 m->adaptation_layer_indicator_provided = 0; 2561 2562 /* seed random number generator */ 2563 m->random_counter = 1; 2564 m->store_at = SCTP_SIGNATURE_SIZE; 2565 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2566 sctp_fill_random_store(m); 2567 2568 /* Minimum cookie size */ 2569 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2570 sizeof(struct sctp_state_cookie); 2571 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2572 2573 /* Setup the initial secret */ 2574 (void)SCTP_GETTIME_TIMEVAL(&time); 2575 m->time_of_secret_change = (unsigned int)time.tv_sec; 2576 2577 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2578 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2579 } 2580 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2581 2582 /* How long is a cookie good for ? */ 2583 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2584 /* 2585 * Initialize authentication parameters 2586 */ 2587 m->local_hmacs = sctp_default_supported_hmaclist(); 2588 m->local_auth_chunks = sctp_alloc_chunklist(); 2589 if (inp->asconf_supported) { 2590 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2591 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2592 } 2593 m->default_dscp = 0; 2594 #ifdef INET6 2595 m->default_flowlabel = 0; 2596 #endif 2597 m->port = 0; /* encapsulation disabled by default */ 2598 LIST_INIT(&m->shared_keys); 2599 /* add default NULL key as key id 0 */ 2600 null_key = sctp_alloc_sharedkey(); 2601 sctp_insert_sharedkey(&m->shared_keys, null_key); 2602 SCTP_INP_WUNLOCK(inp); 2603 #ifdef SCTP_LOG_CLOSING 2604 sctp_log_closing(inp, NULL, 12); 2605 #endif 2606 return (error); 2607 } 2608 2609 void 2610 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2611 struct sctp_tcb *stcb) 2612 { 2613 struct sctp_nets *net; 2614 uint16_t lport, rport; 2615 struct sctppcbhead *head; 2616 struct sctp_laddr *laddr, *oladdr; 2617 2618 atomic_add_int(&stcb->asoc.refcnt, 1); 2619 SCTP_TCB_UNLOCK(stcb); 2620 SCTP_INP_INFO_WLOCK(); 2621 SCTP_INP_WLOCK(old_inp); 2622 SCTP_INP_WLOCK(new_inp); 2623 SCTP_TCB_LOCK(stcb); 2624 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2625 2626 #ifdef INET6 2627 if (old_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2628 new_inp->ip_inp.inp.inp_flags |= old_inp->ip_inp.inp.inp_flags & INP_CONTROLOPTS; 2629 if (old_inp->ip_inp.inp.in6p_outputopts) { 2630 new_inp->ip_inp.inp.in6p_outputopts = ip6_copypktopts(old_inp->ip_inp.inp.in6p_outputopts, M_NOWAIT); 2631 } 2632 } 2633 #endif 2634 #if defined(INET) && defined(INET6) 2635 else 2636 #endif 2637 #ifdef INET 2638 { 2639 new_inp->ip_inp.inp.inp_ip_tos = old_inp->ip_inp.inp.inp_ip_tos; 2640 new_inp->ip_inp.inp.inp_ip_ttl = old_inp->ip_inp.inp.inp_ip_ttl; 2641 } 2642 #endif 2643 new_inp->sctp_ep.time_of_secret_change = 2644 old_inp->sctp_ep.time_of_secret_change; 2645 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2646 sizeof(old_inp->sctp_ep.secret_key)); 2647 new_inp->sctp_ep.current_secret_number = 2648 old_inp->sctp_ep.current_secret_number; 2649 new_inp->sctp_ep.last_secret_number = 2650 old_inp->sctp_ep.last_secret_number; 2651 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2652 2653 /* make it so new data pours into the new socket */ 2654 stcb->sctp_socket = new_inp->sctp_socket; 2655 stcb->sctp_ep = new_inp; 2656 2657 /* Copy the port across */ 2658 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2659 rport = stcb->rport; 2660 /* Pull the tcb from the old association */ 2661 LIST_REMOVE(stcb, sctp_tcbhash); 2662 LIST_REMOVE(stcb, sctp_tcblist); 2663 if (stcb->asoc.in_asocid_hash) { 2664 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2665 } 2666 /* Now insert the new_inp into the TCP connected hash */ 2667 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2668 2669 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2670 /* Its safe to access */ 2671 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2672 2673 /* Now move the tcb into the endpoint list */ 2674 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2675 /* 2676 * Question, do we even need to worry about the ep-hash since we 2677 * only have one connection? Probably not :> so lets get rid of it 2678 * and not suck up any kernel memory in that. 2679 */ 2680 if (stcb->asoc.in_asocid_hash) { 2681 struct sctpasochead *lhd; 2682 2683 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2684 new_inp->hashasocidmark)]; 2685 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2686 } 2687 /* Ok. Let's restart timer. */ 2688 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2689 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2690 stcb, net); 2691 } 2692 2693 SCTP_INP_INFO_WUNLOCK(); 2694 if (new_inp->sctp_tcbhash != NULL) { 2695 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2696 new_inp->sctp_tcbhash = NULL; 2697 } 2698 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2699 /* Subset bound, so copy in the laddr list from the old_inp */ 2700 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2701 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2702 if (laddr == NULL) { 2703 /* 2704 * Gak, what can we do? This assoc is really 2705 * HOSED. We probably should send an abort 2706 * here. 2707 */ 2708 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2709 continue; 2710 } 2711 SCTP_INCR_LADDR_COUNT(); 2712 memset(laddr, 0, sizeof(*laddr)); 2713 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2714 laddr->ifa = oladdr->ifa; 2715 atomic_add_int(&laddr->ifa->refcount, 1); 2716 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2717 sctp_nxt_addr); 2718 new_inp->laddr_count++; 2719 if (oladdr == stcb->asoc.last_used_address) { 2720 stcb->asoc.last_used_address = laddr; 2721 } 2722 } 2723 } 2724 /* Now any running timers need to be adjusted. */ 2725 if (stcb->asoc.dack_timer.ep == old_inp) { 2726 SCTP_INP_DECR_REF(old_inp); 2727 stcb->asoc.dack_timer.ep = new_inp; 2728 SCTP_INP_INCR_REF(new_inp); 2729 } 2730 if (stcb->asoc.asconf_timer.ep == old_inp) { 2731 SCTP_INP_DECR_REF(old_inp); 2732 stcb->asoc.asconf_timer.ep = new_inp; 2733 SCTP_INP_INCR_REF(new_inp); 2734 } 2735 if (stcb->asoc.strreset_timer.ep == old_inp) { 2736 SCTP_INP_DECR_REF(old_inp); 2737 stcb->asoc.strreset_timer.ep = new_inp; 2738 SCTP_INP_INCR_REF(new_inp); 2739 } 2740 if (stcb->asoc.shut_guard_timer.ep == old_inp) { 2741 SCTP_INP_DECR_REF(old_inp); 2742 stcb->asoc.shut_guard_timer.ep = new_inp; 2743 SCTP_INP_INCR_REF(new_inp); 2744 } 2745 if (stcb->asoc.autoclose_timer.ep == old_inp) { 2746 SCTP_INP_DECR_REF(old_inp); 2747 stcb->asoc.autoclose_timer.ep = new_inp; 2748 SCTP_INP_INCR_REF(new_inp); 2749 } 2750 if (stcb->asoc.delete_prim_timer.ep == old_inp) { 2751 SCTP_INP_DECR_REF(old_inp); 2752 stcb->asoc.delete_prim_timer.ep = new_inp; 2753 SCTP_INP_INCR_REF(new_inp); 2754 } 2755 /* now what about the nets? */ 2756 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2757 if (net->pmtu_timer.ep == old_inp) { 2758 SCTP_INP_DECR_REF(old_inp); 2759 net->pmtu_timer.ep = new_inp; 2760 SCTP_INP_INCR_REF(new_inp); 2761 } 2762 if (net->hb_timer.ep == old_inp) { 2763 SCTP_INP_DECR_REF(old_inp); 2764 net->hb_timer.ep = new_inp; 2765 SCTP_INP_INCR_REF(new_inp); 2766 } 2767 if (net->rxt_timer.ep == old_inp) { 2768 SCTP_INP_DECR_REF(old_inp); 2769 net->rxt_timer.ep = new_inp; 2770 SCTP_INP_INCR_REF(new_inp); 2771 } 2772 } 2773 SCTP_INP_WUNLOCK(new_inp); 2774 SCTP_INP_WUNLOCK(old_inp); 2775 } 2776 2777 /* 2778 * insert an laddr entry with the given ifa for the desired list 2779 */ 2780 static int 2781 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2782 { 2783 struct sctp_laddr *laddr; 2784 2785 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2786 if (laddr == NULL) { 2787 /* out of memory? */ 2788 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2789 return (EINVAL); 2790 } 2791 SCTP_INCR_LADDR_COUNT(); 2792 memset(laddr, 0, sizeof(*laddr)); 2793 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2794 laddr->ifa = ifa; 2795 laddr->action = act; 2796 atomic_add_int(&ifa->refcount, 1); 2797 /* insert it */ 2798 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2799 2800 return (0); 2801 } 2802 2803 /* 2804 * Remove an laddr entry from the local address list (on an assoc) 2805 */ 2806 static void 2807 sctp_remove_laddr(struct sctp_laddr *laddr) 2808 { 2809 2810 /* remove from the list */ 2811 LIST_REMOVE(laddr, sctp_nxt_addr); 2812 sctp_free_ifa(laddr->ifa); 2813 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2814 SCTP_DECR_LADDR_COUNT(); 2815 } 2816 2817 /* 2818 * Bind the socket, with the PCB and global info locks held. Note, if a 2819 * socket address is specified, the PCB lock may be dropped and re-acquired. 2820 * 2821 * sctp_ifap is used to bypass normal local address validation checks. 2822 */ 2823 int 2824 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr, 2825 struct sctp_ifa *sctp_ifap, struct thread *td) 2826 { 2827 /* bind a ep to a socket address */ 2828 struct sctppcbhead *head; 2829 struct sctp_inpcb *inp_tmp; 2830 struct inpcb *ip_inp; 2831 int port_reuse_active = 0; 2832 int bindall; 2833 uint16_t lport; 2834 int error; 2835 uint32_t vrf_id; 2836 2837 KASSERT(td != NULL, ("%s: null thread", __func__)); 2838 2839 error = 0; 2840 lport = 0; 2841 bindall = 1; 2842 ip_inp = &inp->ip_inp.inp; 2843 2844 SCTP_INP_INFO_WLOCK_ASSERT(); 2845 SCTP_INP_WLOCK_ASSERT(inp); 2846 2847 #ifdef SCTP_DEBUG 2848 if (addr) { 2849 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2850 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2851 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2852 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2853 } 2854 #endif 2855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2856 error = EINVAL; 2857 /* already did a bind, subsequent binds NOT allowed ! */ 2858 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2859 goto out; 2860 } 2861 if (addr != NULL) { 2862 switch (addr->sa_family) { 2863 #ifdef INET 2864 case AF_INET: 2865 { 2866 struct sockaddr_in *sin; 2867 2868 /* IPV6_V6ONLY socket? */ 2869 if (SCTP_IPV6_V6ONLY(inp)) { 2870 error = EINVAL; 2871 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2872 goto out; 2873 } 2874 if (addr->sa_len != sizeof(*sin)) { 2875 error = EINVAL; 2876 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2877 goto out; 2878 } 2879 2880 sin = (struct sockaddr_in *)addr; 2881 lport = sin->sin_port; 2882 /* 2883 * For LOOPBACK the prison_local_ip4() call 2884 * will transmute the ip address to the 2885 * proper value. 2886 */ 2887 if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) { 2888 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2889 goto out; 2890 } 2891 if (sin->sin_addr.s_addr != INADDR_ANY) { 2892 bindall = 0; 2893 } 2894 break; 2895 } 2896 #endif 2897 #ifdef INET6 2898 case AF_INET6: 2899 { 2900 /* 2901 * Only for pure IPv6 Address. (No IPv4 2902 * Mapped!) 2903 */ 2904 struct sockaddr_in6 *sin6; 2905 2906 sin6 = (struct sockaddr_in6 *)addr; 2907 if (addr->sa_len != sizeof(*sin6)) { 2908 error = EINVAL; 2909 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2910 goto out; 2911 } 2912 lport = sin6->sin6_port; 2913 /* 2914 * For LOOPBACK the prison_local_ip6() call 2915 * will transmute the ipv6 address to the 2916 * proper value. 2917 */ 2918 if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr, 2919 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2920 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2921 goto out; 2922 } 2923 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2924 bindall = 0; 2925 /* KAME hack: embed scopeid */ 2926 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2927 error = EINVAL; 2928 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2929 goto out; 2930 } 2931 } 2932 /* this must be cleared for ifa_ifwithaddr() */ 2933 sin6->sin6_scope_id = 0; 2934 break; 2935 } 2936 #endif 2937 default: 2938 error = EAFNOSUPPORT; 2939 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2940 goto out; 2941 } 2942 } 2943 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2944 vrf_id = inp->def_vrf_id; 2945 2946 if (lport) { 2947 /* 2948 * Did the caller specify a port? if so we must see if an ep 2949 * already has this one bound. 2950 */ 2951 /* got to be root to get at low ports */ 2952 if (ntohs(lport) < IPPORT_RESERVED && 2953 (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 2954 goto out; 2955 } 2956 SCTP_INP_INCR_REF(inp); 2957 SCTP_INP_WUNLOCK(inp); 2958 if (bindall) { 2959 vrf_id = inp->def_vrf_id; 2960 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2961 if (inp_tmp != NULL) { 2962 /* 2963 * lock guy returned and lower count note 2964 * that we are not bound so inp_tmp should 2965 * NEVER be inp. And it is this inp 2966 * (inp_tmp) that gets the reference bump, 2967 * so we must lower it. 2968 */ 2969 SCTP_INP_DECR_REF(inp_tmp); 2970 /* unlock info */ 2971 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2972 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2973 /* 2974 * Ok, must be one-2-one and 2975 * allowing port re-use 2976 */ 2977 port_reuse_active = 1; 2978 goto continue_anyway; 2979 } 2980 SCTP_INP_WLOCK(inp); 2981 SCTP_INP_DECR_REF(inp); 2982 error = EADDRINUSE; 2983 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2984 goto out; 2985 } 2986 } else { 2987 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2988 if (inp_tmp != NULL) { 2989 /* 2990 * lock guy returned and lower count note 2991 * that we are not bound so inp_tmp should 2992 * NEVER be inp. And it is this inp 2993 * (inp_tmp) that gets the reference bump, 2994 * so we must lower it. 2995 */ 2996 SCTP_INP_DECR_REF(inp_tmp); 2997 /* unlock info */ 2998 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2999 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3000 /* 3001 * Ok, must be one-2-one and 3002 * allowing port re-use 3003 */ 3004 port_reuse_active = 1; 3005 goto continue_anyway; 3006 } 3007 SCTP_INP_WLOCK(inp); 3008 SCTP_INP_DECR_REF(inp); 3009 error = EADDRINUSE; 3010 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3011 goto out; 3012 } 3013 } 3014 continue_anyway: 3015 SCTP_INP_WLOCK(inp); 3016 SCTP_INP_DECR_REF(inp); 3017 if (bindall) { 3018 /* verify that no lport is not used by a singleton */ 3019 if ((port_reuse_active == 0) && 3020 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3021 /* Sorry someone already has this one bound */ 3022 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3023 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3024 port_reuse_active = 1; 3025 } else { 3026 error = EADDRINUSE; 3027 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3028 goto out; 3029 } 3030 } 3031 } 3032 } else { 3033 uint16_t first, last, candidate; 3034 uint16_t count; 3035 3036 if (ip_inp->inp_flags & INP_HIGHPORT) { 3037 first = MODULE_GLOBAL(ipport_hifirstauto); 3038 last = MODULE_GLOBAL(ipport_hilastauto); 3039 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3040 if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { 3041 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3042 goto out; 3043 } 3044 first = MODULE_GLOBAL(ipport_lowfirstauto); 3045 last = MODULE_GLOBAL(ipport_lowlastauto); 3046 } else { 3047 first = MODULE_GLOBAL(ipport_firstauto); 3048 last = MODULE_GLOBAL(ipport_lastauto); 3049 } 3050 if (first > last) { 3051 uint16_t temp; 3052 3053 temp = first; 3054 first = last; 3055 last = temp; 3056 } 3057 count = last - first + 1; /* number of candidates */ 3058 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3059 3060 for (;;) { 3061 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3062 lport = htons(candidate); 3063 break; 3064 } 3065 if (--count == 0) { 3066 error = EADDRINUSE; 3067 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3068 goto out; 3069 } 3070 if (candidate == last) 3071 candidate = first; 3072 else 3073 candidate = candidate + 1; 3074 } 3075 } 3076 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3077 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3078 /* 3079 * this really should not happen. The guy did a non-blocking 3080 * bind and then did a close at the same time. 3081 */ 3082 error = EINVAL; 3083 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3084 goto out; 3085 } 3086 /* ok we look clear to give out this port, so lets setup the binding */ 3087 if (bindall) { 3088 /* binding to all addresses, so just set in the proper flags */ 3089 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3090 /* set the automatic addr changes from kernel flag */ 3091 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3092 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3093 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3094 } else { 3095 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3096 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3097 } 3098 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3099 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3100 } else { 3101 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3102 } 3103 /* 3104 * set the automatic mobility_base from kernel flag (by 3105 * micchie) 3106 */ 3107 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3109 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3110 } else { 3111 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3112 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3113 } 3114 /* 3115 * set the automatic mobility_fasthandoff from kernel flag 3116 * (by micchie) 3117 */ 3118 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3119 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3120 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3121 } else { 3122 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3123 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3124 } 3125 } else { 3126 /* 3127 * bind specific, make sure flags is off and add a new 3128 * address structure to the sctp_addr_list inside the ep 3129 * structure. 3130 * 3131 * We will need to allocate one and insert it at the head. 3132 * The socketopt call can just insert new addresses in there 3133 * as well. It will also have to do the embed scope kame 3134 * hack too (before adding). 3135 */ 3136 struct sctp_ifa *ifa; 3137 union sctp_sockstore store; 3138 3139 memset(&store, 0, sizeof(store)); 3140 switch (addr->sa_family) { 3141 #ifdef INET 3142 case AF_INET: 3143 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3144 store.sin.sin_port = 0; 3145 break; 3146 #endif 3147 #ifdef INET6 3148 case AF_INET6: 3149 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3150 store.sin6.sin6_port = 0; 3151 break; 3152 #endif 3153 default: 3154 break; 3155 } 3156 /* 3157 * first find the interface with the bound address need to 3158 * zero out the port to find the address! yuck! can't do 3159 * this earlier since need port for sctp_pcb_findep() 3160 */ 3161 if (sctp_ifap != NULL) { 3162 ifa = sctp_ifap; 3163 } else { 3164 /* 3165 * Note for BSD we hit here always other O/S's will 3166 * pass things in via the sctp_ifap argument. 3167 */ 3168 ifa = sctp_find_ifa_by_addr(&store.sa, 3169 vrf_id, SCTP_ADDR_NOT_LOCKED); 3170 } 3171 if (ifa == NULL) { 3172 error = EADDRNOTAVAIL; 3173 /* Can't find an interface with that address */ 3174 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3175 goto out; 3176 } 3177 #ifdef INET6 3178 if (addr->sa_family == AF_INET6) { 3179 /* GAK, more FIXME IFA lock? */ 3180 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3181 /* Can't bind a non-existent addr. */ 3182 error = EINVAL; 3183 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3184 goto out; 3185 } 3186 } 3187 #endif 3188 /* we're not bound all */ 3189 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3190 /* allow bindx() to send ASCONF's for binding changes */ 3191 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3192 /* clear automatic addr changes from kernel flag */ 3193 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3194 3195 /* add this address to the endpoint list */ 3196 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3197 if (error != 0) 3198 goto out; 3199 inp->laddr_count++; 3200 } 3201 /* find the bucket */ 3202 if (port_reuse_active) { 3203 /* Put it into tcp 1-2-1 hash */ 3204 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3205 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3206 } else { 3207 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3208 } 3209 /* put it in the bucket */ 3210 LIST_INSERT_HEAD(head, inp, sctp_hash); 3211 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3212 (void *)head, ntohs(lport), port_reuse_active); 3213 /* set in the port */ 3214 inp->sctp_lport = lport; 3215 3216 /* turn off just the unbound flag */ 3217 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0, 3218 ("%s: inp %p is already bound", __func__, inp)); 3219 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3220 out: 3221 return (error); 3222 } 3223 3224 int 3225 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 3226 struct sctp_ifa *sctp_ifap, struct thread *td) 3227 { 3228 struct sctp_inpcb *inp; 3229 int error; 3230 3231 inp = so->so_pcb; 3232 SCTP_INP_INFO_WLOCK(); 3233 SCTP_INP_WLOCK(inp); 3234 error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td); 3235 SCTP_INP_WUNLOCK(inp); 3236 SCTP_INP_INFO_WUNLOCK(); 3237 return (error); 3238 } 3239 3240 static void 3241 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3242 { 3243 struct sctp_iterator *it, *nit; 3244 3245 /* 3246 * We enter with the only the ITERATOR_LOCK in place and a write 3247 * lock on the inp_info stuff. 3248 */ 3249 it = sctp_it_ctl.cur_it; 3250 if (it && (it->vn != curvnet)) { 3251 /* Its not looking at our VNET */ 3252 return; 3253 } 3254 if (it && (it->inp == inp)) { 3255 /* 3256 * This is tricky and we hold the iterator lock, but when it 3257 * returns and gets the lock (when we release it) the 3258 * iterator will try to operate on inp. We need to stop that 3259 * from happening. But of course the iterator has a 3260 * reference on the stcb and inp. We can mark it and it will 3261 * stop. 3262 * 3263 * If its a single iterator situation, we set the end 3264 * iterator flag. Otherwise we set the iterator to go to the 3265 * next inp. 3266 * 3267 */ 3268 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3269 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3270 } else { 3271 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3272 } 3273 } 3274 /* 3275 * Now go through and remove any single reference to our inp that 3276 * may be still pending on the list 3277 */ 3278 SCTP_IPI_ITERATOR_WQ_LOCK(); 3279 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3280 if (it->vn != curvnet) { 3281 continue; 3282 } 3283 if (it->inp == inp) { 3284 /* This one points to me is it inp specific? */ 3285 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3286 /* Remove and free this one */ 3287 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3288 it, sctp_nxt_itr); 3289 if (it->function_atend != NULL) { 3290 (*it->function_atend) (it->pointer, it->val); 3291 } 3292 SCTP_FREE(it, SCTP_M_ITER); 3293 } else { 3294 it->inp = LIST_NEXT(it->inp, sctp_list); 3295 if (it->inp) { 3296 SCTP_INP_INCR_REF(it->inp); 3297 } 3298 } 3299 /* 3300 * When its put in the refcnt is incremented so decr 3301 * it 3302 */ 3303 SCTP_INP_DECR_REF(inp); 3304 } 3305 } 3306 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3307 } 3308 3309 /* release sctp_inpcb unbind the port */ 3310 void 3311 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3312 { 3313 /* 3314 * Here we free a endpoint. We must find it (if it is in the Hash 3315 * table) and remove it from there. Then we must also find it in the 3316 * overall list and remove it from there. After all removals are 3317 * complete then any timer has to be stopped. Then start the actual 3318 * freeing. a) Any local lists. b) Any associations. c) The hash of 3319 * all associations. d) finally the ep itself. 3320 */ 3321 struct sctp_tcb *stcb, *nstcb; 3322 struct sctp_laddr *laddr, *nladdr; 3323 struct inpcb *ip_pcb; 3324 struct socket *so; 3325 int being_refed = 0; 3326 struct sctp_queued_to_read *sq, *nsq; 3327 int cnt; 3328 sctp_sharedkey_t *shared_key, *nshared_key; 3329 3330 #ifdef SCTP_LOG_CLOSING 3331 sctp_log_closing(inp, NULL, 0); 3332 #endif 3333 SCTP_ITERATOR_LOCK(); 3334 /* mark any iterators on the list or being processed */ 3335 sctp_iterator_inp_being_freed(inp); 3336 SCTP_ITERATOR_UNLOCK(); 3337 3338 SCTP_ASOC_CREATE_LOCK(inp); 3339 SCTP_INP_INFO_WLOCK(); 3340 SCTP_INP_WLOCK(inp); 3341 so = inp->sctp_socket; 3342 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0, 3343 ("%s: inp %p still has socket", __func__, inp)); 3344 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0, 3345 ("%s: double free of inp %p", __func__, inp)); 3346 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3347 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3348 /* socket is gone, so no more wakeups allowed */ 3349 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3350 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3351 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3352 } 3353 /* First time through we have the socket lock, after that no more. */ 3354 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3355 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3356 3357 if (inp->control) { 3358 sctp_m_freem(inp->control); 3359 inp->control = NULL; 3360 } 3361 if (inp->pkt) { 3362 sctp_m_freem(inp->pkt); 3363 inp->pkt = NULL; 3364 } 3365 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3366 * here but I will be nice :> (i.e. 3367 * ip_pcb = ep;) */ 3368 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3369 int cnt_in_sd; 3370 3371 cnt_in_sd = 0; 3372 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) { 3373 SCTP_TCB_LOCK(stcb); 3374 /* Disconnect the socket please. */ 3375 stcb->sctp_socket = NULL; 3376 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET); 3377 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3378 /* Skip guys being freed */ 3379 cnt_in_sd++; 3380 if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3381 /* 3382 * Special case - we did not start a 3383 * kill timer on the asoc due to it 3384 * was not closed. So go ahead and 3385 * start it now. 3386 */ 3387 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 3388 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3389 } 3390 SCTP_TCB_UNLOCK(stcb); 3391 continue; 3392 } 3393 if (((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) || 3394 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) && 3395 (stcb->asoc.total_output_queue_size == 0)) { 3396 /* 3397 * If we have data in queue, we don't want 3398 * to just free since the app may have done, 3399 * send()/close or connect/send/close. And 3400 * it wants the data to get across first. 3401 */ 3402 /* Just abandon things in the front states */ 3403 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_NOFORCE, 3404 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3405 cnt_in_sd++; 3406 } 3407 continue; 3408 } 3409 if ((stcb->asoc.size_on_reasm_queue > 0) || 3410 (stcb->asoc.control_pdapi) || 3411 (stcb->asoc.size_on_all_streams > 0) || 3412 ((so != NULL) && (SCTP_SBAVAIL(&so->so_rcv) > 0))) { 3413 /* Left with Data unread */ 3414 struct mbuf *op_err; 3415 3416 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3417 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3418 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); 3419 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3420 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3421 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3422 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3423 } 3424 if (sctp_free_assoc(inp, stcb, 3425 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3426 cnt_in_sd++; 3427 } 3428 continue; 3429 } else if (TAILQ_EMPTY(&stcb->asoc.send_queue) && 3430 TAILQ_EMPTY(&stcb->asoc.sent_queue) && 3431 (stcb->asoc.stream_queue_cnt == 0)) { 3432 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) { 3433 goto abort_anyway; 3434 } 3435 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) && 3436 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3437 struct sctp_nets *netp; 3438 3439 /* 3440 * there is nothing queued to send, 3441 * so I send shutdown 3442 */ 3443 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3444 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3445 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3446 } 3447 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT); 3448 sctp_stop_timers_for_shutdown(stcb); 3449 if (stcb->asoc.alternate) { 3450 netp = stcb->asoc.alternate; 3451 } else { 3452 netp = stcb->asoc.primary_destination; 3453 } 3454 sctp_send_shutdown(stcb, netp); 3455 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 3456 netp); 3457 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL); 3458 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3459 } 3460 } else { 3461 /* mark into shutdown pending */ 3462 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING); 3463 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL); 3464 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) { 3465 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT); 3466 } 3467 if (TAILQ_EMPTY(&stcb->asoc.send_queue) && 3468 TAILQ_EMPTY(&stcb->asoc.sent_queue) && 3469 (stcb->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3470 struct mbuf *op_err; 3471 3472 abort_anyway: 3473 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3474 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3475 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); 3476 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3477 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3478 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3479 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3480 } 3481 if (sctp_free_assoc(inp, stcb, 3482 SCTP_PCBFREE_NOFORCE, 3483 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3484 cnt_in_sd++; 3485 } 3486 continue; 3487 } else { 3488 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3489 } 3490 } 3491 cnt_in_sd++; 3492 SCTP_TCB_UNLOCK(stcb); 3493 } 3494 /* now is there some left in our SHUTDOWN state? */ 3495 if (cnt_in_sd) { 3496 #ifdef SCTP_LOG_CLOSING 3497 sctp_log_closing(inp, NULL, 2); 3498 #endif 3499 inp->sctp_socket = NULL; 3500 SCTP_INP_WUNLOCK(inp); 3501 SCTP_ASOC_CREATE_UNLOCK(inp); 3502 SCTP_INP_INFO_WUNLOCK(); 3503 return; 3504 } 3505 } 3506 inp->sctp_socket = NULL; 3507 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 3508 /* 3509 * ok, this guy has been bound. It's port is somewhere in 3510 * the SCTP_BASE_INFO(hash table). Remove it! 3511 */ 3512 LIST_REMOVE(inp, sctp_hash); 3513 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3514 } 3515 3516 /* 3517 * If there is a timer running to kill us, forget it, since it may 3518 * have a contest on the INP lock.. which would cause us to die ... 3519 */ 3520 cnt = 0; 3521 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) { 3522 SCTP_TCB_LOCK(stcb); 3523 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3524 /* Disconnect the socket please */ 3525 stcb->sctp_socket = NULL; 3526 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET); 3527 } 3528 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3529 if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3530 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 3531 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3532 } 3533 cnt++; 3534 SCTP_TCB_UNLOCK(stcb); 3535 continue; 3536 } 3537 /* Free associations that are NOT killing us */ 3538 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) && 3539 ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3540 struct mbuf *op_err; 3541 3542 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3543 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3544 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); 3545 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3546 } else if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3547 cnt++; 3548 SCTP_TCB_UNLOCK(stcb); 3549 continue; 3550 } 3551 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 3552 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3553 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3554 } 3555 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, 3556 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3557 cnt++; 3558 } 3559 } 3560 if (cnt) { 3561 /* Ok we have someone out there that will kill us */ 3562 #ifdef SCTP_LOG_CLOSING 3563 sctp_log_closing(inp, NULL, 3); 3564 #endif 3565 SCTP_INP_WUNLOCK(inp); 3566 SCTP_ASOC_CREATE_UNLOCK(inp); 3567 SCTP_INP_INFO_WUNLOCK(); 3568 return; 3569 } 3570 if (SCTP_INP_LOCK_CONTENDED(inp)) 3571 being_refed++; 3572 if (SCTP_INP_READ_CONTENDED(inp)) 3573 being_refed++; 3574 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3575 being_refed++; 3576 /* NOTE: 0 refcount also means no timers are referencing us. */ 3577 if ((inp->refcount) || 3578 (being_refed) || 3579 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3580 #ifdef SCTP_LOG_CLOSING 3581 sctp_log_closing(inp, NULL, 4); 3582 #endif 3583 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3584 SCTP_INP_WUNLOCK(inp); 3585 SCTP_ASOC_CREATE_UNLOCK(inp); 3586 SCTP_INP_INFO_WUNLOCK(); 3587 return; 3588 } 3589 inp->sctp_ep.signature_change.type = 0; 3590 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3591 /* 3592 * Remove it from the list .. last thing we need a lock for. 3593 */ 3594 LIST_REMOVE(inp, sctp_list); 3595 SCTP_INP_WUNLOCK(inp); 3596 SCTP_ASOC_CREATE_UNLOCK(inp); 3597 SCTP_INP_INFO_WUNLOCK(); 3598 3599 #ifdef SCTP_LOG_CLOSING 3600 sctp_log_closing(inp, NULL, 5); 3601 #endif 3602 if ((inp->sctp_asocidhash) != NULL) { 3603 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3604 inp->sctp_asocidhash = NULL; 3605 } 3606 /* sa_ignore FREED_MEMORY */ 3607 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3608 /* Its only abandoned if it had data left */ 3609 if (sq->length) 3610 SCTP_STAT_INCR(sctps_left_abandon); 3611 3612 TAILQ_REMOVE(&inp->read_queue, sq, next); 3613 sctp_free_remote_addr(sq->whoFrom); 3614 if (so) 3615 so->so_rcv.sb_cc -= sq->length; 3616 if (sq->data) { 3617 sctp_m_freem(sq->data); 3618 sq->data = NULL; 3619 } 3620 /* 3621 * no need to free the net count, since at this point all 3622 * assoc's are gone. 3623 */ 3624 sctp_free_a_readq(NULL, sq); 3625 } 3626 /* Now the sctp_pcb things */ 3627 /* 3628 * free each asoc if it is not already closed/free. we can't use the 3629 * macro here since le_next will get freed as part of the 3630 * sctp_free_assoc() call. 3631 */ 3632 if (ip_pcb->inp_options) { 3633 (void)sctp_m_free(ip_pcb->inp_options); 3634 ip_pcb->inp_options = 0; 3635 } 3636 #ifdef INET6 3637 if (ip_pcb->inp_vflag & INP_IPV6) { 3638 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3639 } 3640 #endif /* INET6 */ 3641 ip_pcb->inp_vflag = 0; 3642 /* free up authentication fields */ 3643 if (inp->sctp_ep.local_auth_chunks != NULL) 3644 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3645 if (inp->sctp_ep.local_hmacs != NULL) 3646 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3647 3648 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3649 LIST_REMOVE(shared_key, next); 3650 sctp_free_sharedkey(shared_key); 3651 /* sa_ignore FREED_MEMORY */ 3652 } 3653 3654 /* 3655 * if we have an address list the following will free the list of 3656 * ifaddr's that are set into this ep. Again macro limitations here, 3657 * since the LIST_FOREACH could be a bad idea. 3658 */ 3659 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3660 sctp_remove_laddr(laddr); 3661 } 3662 3663 #ifdef SCTP_TRACK_FREED_ASOCS 3664 /* TEMP CODE */ 3665 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_free_list, sctp_tcblist, nstcb) { 3666 LIST_REMOVE(stcb, sctp_tcblist); 3667 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 3668 SCTP_DECR_ASOC_COUNT(); 3669 } 3670 /* *** END TEMP CODE *** */ 3671 #endif 3672 /* Now lets see about freeing the EP hash table. */ 3673 if (inp->sctp_tcbhash != NULL) { 3674 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3675 inp->sctp_tcbhash = NULL; 3676 } 3677 /* Now we must put the ep memory back into the zone pool */ 3678 crfree(inp->ip_inp.inp.inp_cred); 3679 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3680 SCTP_INP_LOCK_DESTROY(inp); 3681 SCTP_INP_READ_DESTROY(inp); 3682 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3683 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3684 SCTP_DECR_EP_COUNT(); 3685 } 3686 3687 struct sctp_nets * 3688 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3689 { 3690 struct sctp_nets *net; 3691 3692 /* locate the address */ 3693 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3694 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3695 return (net); 3696 } 3697 return (NULL); 3698 } 3699 3700 int 3701 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3702 { 3703 struct sctp_ifa *sctp_ifa; 3704 3705 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3706 if (sctp_ifa) { 3707 return (1); 3708 } else { 3709 return (0); 3710 } 3711 } 3712 3713 /* 3714 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3715 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3716 * stats of stuff. 3717 */ 3718 int 3719 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3720 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3721 { 3722 /* 3723 * The following is redundant to the same lines in the 3724 * sctp_aloc_assoc() but is needed since others call the add address 3725 * function 3726 */ 3727 struct sctp_nets *net, *netfirst; 3728 int addr_inscope; 3729 3730 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3731 from); 3732 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3733 3734 netfirst = sctp_findnet(stcb, newaddr); 3735 if (netfirst) { 3736 /* 3737 * Lie and return ok, we don't want to make the association 3738 * go away for this behavior. It will happen in the TCP 3739 * model in a connected socket. It does not reach the hash 3740 * table until after the association is built so it can't be 3741 * found. Mark as reachable, since the initial creation will 3742 * have been cleared and the NOT_IN_ASSOC flag will have 3743 * been added... and we don't want to end up removing it 3744 * back out. 3745 */ 3746 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3747 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3748 SCTP_ADDR_UNCONFIRMED); 3749 } else { 3750 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3751 } 3752 3753 return (0); 3754 } 3755 addr_inscope = 1; 3756 switch (newaddr->sa_family) { 3757 #ifdef INET 3758 case AF_INET: 3759 { 3760 struct sockaddr_in *sin; 3761 3762 sin = (struct sockaddr_in *)newaddr; 3763 if (sin->sin_addr.s_addr == 0) { 3764 /* Invalid address */ 3765 return (-1); 3766 } 3767 /* zero out the zero area */ 3768 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3769 3770 /* assure len is set */ 3771 sin->sin_len = sizeof(struct sockaddr_in); 3772 if (set_scope) { 3773 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3774 stcb->asoc.scope.ipv4_local_scope = 1; 3775 } 3776 } else { 3777 /* Validate the address is in scope */ 3778 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3779 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3780 addr_inscope = 0; 3781 } 3782 } 3783 break; 3784 } 3785 #endif 3786 #ifdef INET6 3787 case AF_INET6: 3788 { 3789 struct sockaddr_in6 *sin6; 3790 3791 sin6 = (struct sockaddr_in6 *)newaddr; 3792 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3793 /* Invalid address */ 3794 return (-1); 3795 } 3796 /* assure len is set */ 3797 sin6->sin6_len = sizeof(struct sockaddr_in6); 3798 if (set_scope) { 3799 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3800 stcb->asoc.scope.loopback_scope = 1; 3801 stcb->asoc.scope.local_scope = 0; 3802 stcb->asoc.scope.ipv4_local_scope = 1; 3803 stcb->asoc.scope.site_scope = 1; 3804 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3805 /* 3806 * If the new destination is a 3807 * LINK_LOCAL we must have common 3808 * site scope. Don't set the local 3809 * scope since we may not share all 3810 * links, only loopback can do this. 3811 * Links on the local network would 3812 * also be on our private network 3813 * for v4 too. 3814 */ 3815 stcb->asoc.scope.ipv4_local_scope = 1; 3816 stcb->asoc.scope.site_scope = 1; 3817 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3818 /* 3819 * If the new destination is 3820 * SITE_LOCAL then we must have site 3821 * scope in common. 3822 */ 3823 stcb->asoc.scope.site_scope = 1; 3824 } 3825 } else { 3826 /* Validate the address is in scope */ 3827 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3828 (stcb->asoc.scope.loopback_scope == 0)) { 3829 addr_inscope = 0; 3830 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3831 (stcb->asoc.scope.local_scope == 0)) { 3832 addr_inscope = 0; 3833 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3834 (stcb->asoc.scope.site_scope == 0)) { 3835 addr_inscope = 0; 3836 } 3837 } 3838 break; 3839 } 3840 #endif 3841 default: 3842 /* not supported family type */ 3843 return (-1); 3844 } 3845 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3846 if (net == NULL) { 3847 return (-1); 3848 } 3849 SCTP_INCR_RADDR_COUNT(); 3850 memset(net, 0, sizeof(struct sctp_nets)); 3851 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3852 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3853 switch (newaddr->sa_family) { 3854 #ifdef INET 3855 case AF_INET: 3856 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3857 break; 3858 #endif 3859 #ifdef INET6 3860 case AF_INET6: 3861 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3862 break; 3863 #endif 3864 default: 3865 break; 3866 } 3867 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3868 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3869 stcb->asoc.scope.loopback_scope = 1; 3870 stcb->asoc.scope.ipv4_local_scope = 1; 3871 stcb->asoc.scope.local_scope = 0; 3872 stcb->asoc.scope.site_scope = 1; 3873 addr_inscope = 1; 3874 } 3875 net->failure_threshold = stcb->asoc.def_net_failure; 3876 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3877 if (addr_inscope == 0) { 3878 net->dest_state = (SCTP_ADDR_REACHABLE | 3879 SCTP_ADDR_OUT_OF_SCOPE); 3880 } else { 3881 if (from == SCTP_ADDR_IS_CONFIRMED) 3882 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3883 net->dest_state = SCTP_ADDR_REACHABLE; 3884 else 3885 net->dest_state = SCTP_ADDR_REACHABLE | 3886 SCTP_ADDR_UNCONFIRMED; 3887 } 3888 /* 3889 * We set this to 0, the timer code knows that this means its an 3890 * initial value 3891 */ 3892 net->rto_needed = 1; 3893 net->RTO = 0; 3894 net->RTO_measured = 0; 3895 stcb->asoc.numnets++; 3896 net->ref_count = 1; 3897 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3898 net->port = port; 3899 net->dscp = stcb->asoc.default_dscp; 3900 #ifdef INET6 3901 net->flowlabel = stcb->asoc.default_flowlabel; 3902 #endif 3903 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3904 net->dest_state |= SCTP_ADDR_NOHB; 3905 } else { 3906 net->dest_state &= ~SCTP_ADDR_NOHB; 3907 } 3908 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3909 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3910 } else { 3911 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3912 } 3913 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3914 /* Init the timer structure */ 3915 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3916 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3917 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3918 3919 /* Now generate a route for this guy */ 3920 #ifdef INET6 3921 /* KAME hack: embed scopeid */ 3922 if (newaddr->sa_family == AF_INET6) { 3923 struct sockaddr_in6 *sin6; 3924 3925 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3926 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3927 sin6->sin6_scope_id = 0; 3928 } 3929 #endif 3930 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3931 stcb->asoc.vrf_id, 3932 stcb->sctp_ep->fibnum); 3933 3934 net->src_addr_selected = 0; 3935 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3936 /* Get source address */ 3937 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3938 stcb, 3939 (sctp_route_t *)&net->ro, 3940 net, 3941 0, 3942 stcb->asoc.vrf_id); 3943 if (stcb->asoc.default_mtu > 0) { 3944 net->mtu = stcb->asoc.default_mtu; 3945 switch (net->ro._l_addr.sa.sa_family) { 3946 #ifdef INET 3947 case AF_INET: 3948 net->mtu += SCTP_MIN_V4_OVERHEAD; 3949 break; 3950 #endif 3951 #ifdef INET6 3952 case AF_INET6: 3953 net->mtu += SCTP_MIN_OVERHEAD; 3954 break; 3955 #endif 3956 default: 3957 break; 3958 } 3959 #if defined(INET) || defined(INET6) 3960 if (net->port) { 3961 net->mtu += (uint32_t)sizeof(struct udphdr); 3962 } 3963 #endif 3964 } else if (net->ro._s_addr != NULL) { 3965 uint32_t imtu, rmtu, hcmtu; 3966 3967 net->src_addr_selected = 1; 3968 /* Now get the interface MTU */ 3969 if (net->ro._s_addr->ifn_p != NULL) { 3970 /* 3971 * XXX: Should we here just use 3972 * net->ro._s_addr->ifn_p->ifn_mtu 3973 */ 3974 imtu = SCTP_GATHER_MTU_FROM_IFN_INFO(net->ro._s_addr->ifn_p->ifn_p, 3975 net->ro._s_addr->ifn_p->ifn_index); 3976 } else { 3977 imtu = 0; 3978 } 3979 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 3980 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3981 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3982 } 3983 } 3984 if (net->mtu == 0) { 3985 if (stcb->asoc.default_mtu > 0) { 3986 net->mtu = stcb->asoc.default_mtu; 3987 switch (net->ro._l_addr.sa.sa_family) { 3988 #ifdef INET 3989 case AF_INET: 3990 net->mtu += SCTP_MIN_V4_OVERHEAD; 3991 break; 3992 #endif 3993 #ifdef INET6 3994 case AF_INET6: 3995 net->mtu += SCTP_MIN_OVERHEAD; 3996 break; 3997 #endif 3998 default: 3999 break; 4000 } 4001 #if defined(INET) || defined(INET6) 4002 if (net->port) { 4003 net->mtu += (uint32_t)sizeof(struct udphdr); 4004 } 4005 #endif 4006 } else { 4007 switch (newaddr->sa_family) { 4008 #ifdef INET 4009 case AF_INET: 4010 net->mtu = SCTP_DEFAULT_MTU; 4011 break; 4012 #endif 4013 #ifdef INET6 4014 case AF_INET6: 4015 net->mtu = 1280; 4016 break; 4017 #endif 4018 default: 4019 break; 4020 } 4021 } 4022 } 4023 #if defined(INET) || defined(INET6) 4024 if (net->port) { 4025 net->mtu -= (uint32_t)sizeof(struct udphdr); 4026 } 4027 #endif 4028 if (from == SCTP_ALLOC_ASOC) { 4029 stcb->asoc.smallest_mtu = net->mtu; 4030 } 4031 if (stcb->asoc.smallest_mtu > net->mtu) { 4032 sctp_pathmtu_adjustment(stcb, net->mtu, true); 4033 } 4034 #ifdef INET6 4035 if (newaddr->sa_family == AF_INET6) { 4036 struct sockaddr_in6 *sin6; 4037 4038 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4039 (void)sa6_recoverscope(sin6); 4040 } 4041 #endif 4042 4043 /* JRS - Use the congestion control given in the CC module */ 4044 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4045 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4046 4047 /* 4048 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4049 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4050 */ 4051 net->find_pseudo_cumack = 1; 4052 net->find_rtx_pseudo_cumack = 1; 4053 /* Choose an initial flowid. */ 4054 net->flowid = stcb->asoc.my_vtag ^ 4055 ntohs(stcb->rport) ^ 4056 ntohs(stcb->sctp_ep->sctp_lport); 4057 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4058 if (netp) { 4059 *netp = net; 4060 } 4061 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4062 if (net->ro.ro_nh == NULL) { 4063 /* Since we have no route put it at the back */ 4064 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4065 } else if (netfirst == NULL) { 4066 /* We are the first one in the pool. */ 4067 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4068 } else if (netfirst->ro.ro_nh == NULL) { 4069 /* 4070 * First one has NO route. Place this one ahead of the first 4071 * one. 4072 */ 4073 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4074 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4075 /* 4076 * This one has a different interface than the one at the 4077 * top of the list. Place it ahead. 4078 */ 4079 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4080 } else { 4081 /* 4082 * Ok we have the same interface as the first one. Move 4083 * forward until we find either a) one with a NULL route... 4084 * insert ahead of that b) one with a different ifp.. insert 4085 * after that. c) end of the list.. insert at the tail. 4086 */ 4087 struct sctp_nets *netlook; 4088 4089 do { 4090 netlook = TAILQ_NEXT(netfirst, sctp_next); 4091 if (netlook == NULL) { 4092 /* End of the list */ 4093 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4094 break; 4095 } else if (netlook->ro.ro_nh == NULL) { 4096 /* next one has NO route */ 4097 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4098 break; 4099 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4100 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4101 net, sctp_next); 4102 break; 4103 } 4104 /* Shift forward */ 4105 netfirst = netlook; 4106 } while (netlook != NULL); 4107 } 4108 4109 /* got to have a primary set */ 4110 if (stcb->asoc.primary_destination == 0) { 4111 stcb->asoc.primary_destination = net; 4112 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4113 (net->ro.ro_nh) && 4114 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4115 /* No route to current primary adopt new primary */ 4116 stcb->asoc.primary_destination = net; 4117 } 4118 /* Validate primary is first */ 4119 net = TAILQ_FIRST(&stcb->asoc.nets); 4120 if ((net != stcb->asoc.primary_destination) && 4121 (stcb->asoc.primary_destination)) { 4122 /* 4123 * first one on the list is NOT the primary sctp_cmpaddr() 4124 * is much more efficient if the primary is the first on the 4125 * list, make it so. 4126 */ 4127 TAILQ_REMOVE(&stcb->asoc.nets, 4128 stcb->asoc.primary_destination, sctp_next); 4129 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4130 stcb->asoc.primary_destination, sctp_next); 4131 } 4132 return (0); 4133 } 4134 4135 static uint32_t 4136 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4137 { 4138 uint32_t id; 4139 struct sctpasochead *head; 4140 struct sctp_tcb *lstcb; 4141 4142 try_again: 4143 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4144 /* TSNH */ 4145 return (0); 4146 } 4147 /* 4148 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4149 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4150 */ 4151 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4152 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4153 } 4154 id = inp->sctp_associd_counter; 4155 inp->sctp_associd_counter++; 4156 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4157 if (lstcb) { 4158 goto try_again; 4159 } 4160 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4161 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4162 stcb->asoc.in_asocid_hash = 1; 4163 return (id); 4164 } 4165 4166 /* 4167 * allocate an association and add it to the endpoint. The caller must be 4168 * careful to add all additional addresses once they are know right away or 4169 * else the assoc will be may experience a blackout scenario. 4170 */ 4171 static struct sctp_tcb * 4172 sctp_aloc_assoc_locked(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4173 int *error, uint32_t override_tag, uint32_t initial_tsn, 4174 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4175 struct thread *p, 4176 int initialize_auth_params) 4177 { 4178 /* note the p argument is only valid in unbound sockets */ 4179 4180 struct sctp_tcb *stcb; 4181 struct sctp_association *asoc; 4182 struct sctpasochead *head; 4183 uint16_t rport; 4184 int err; 4185 4186 SCTP_INP_INFO_WLOCK_ASSERT(); 4187 SCTP_INP_WLOCK_ASSERT(inp); 4188 4189 /* 4190 * Assumption made here: Caller has done a 4191 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4192 * address does not exist already. 4193 */ 4194 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4195 /* Hit max assoc, sorry no more */ 4196 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4197 *error = ENOBUFS; 4198 return (NULL); 4199 } 4200 if (firstaddr == NULL) { 4201 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4202 *error = EINVAL; 4203 return (NULL); 4204 } 4205 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4206 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4207 *error = EINVAL; 4208 return (NULL); 4209 } 4210 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4211 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4212 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4213 /* 4214 * If its in the TCP pool, its NOT allowed to create an 4215 * association. The parent listener needs to call 4216 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4217 * off, or connected one does this.. its an error. 4218 */ 4219 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4220 *error = EINVAL; 4221 return (NULL); 4222 } 4223 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4224 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4225 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4226 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4227 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4228 *error = EINVAL; 4229 return (NULL); 4230 } 4231 } 4232 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4233 #ifdef SCTP_DEBUG 4234 if (firstaddr) { 4235 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4236 switch (firstaddr->sa_family) { 4237 #ifdef INET 4238 case AF_INET: 4239 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4240 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4241 break; 4242 #endif 4243 #ifdef INET6 4244 case AF_INET6: 4245 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4246 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4247 break; 4248 #endif 4249 default: 4250 break; 4251 } 4252 } else { 4253 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4254 } 4255 #endif /* SCTP_DEBUG */ 4256 switch (firstaddr->sa_family) { 4257 #ifdef INET 4258 case AF_INET: 4259 { 4260 struct sockaddr_in *sin; 4261 4262 sin = (struct sockaddr_in *)firstaddr; 4263 if ((ntohs(sin->sin_port) == 0) || 4264 (sin->sin_addr.s_addr == INADDR_ANY) || 4265 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4266 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) || 4267 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 4268 (SCTP_IPV6_V6ONLY(inp) != 0))) { 4269 /* Invalid address */ 4270 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4271 *error = EINVAL; 4272 return (NULL); 4273 } 4274 rport = sin->sin_port; 4275 break; 4276 } 4277 #endif 4278 #ifdef INET6 4279 case AF_INET6: 4280 { 4281 struct sockaddr_in6 *sin6; 4282 4283 sin6 = (struct sockaddr_in6 *)firstaddr; 4284 if ((ntohs(sin6->sin6_port) == 0) || 4285 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4286 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) || 4287 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) { 4288 /* Invalid address */ 4289 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4290 *error = EINVAL; 4291 return (NULL); 4292 } 4293 rport = sin6->sin6_port; 4294 break; 4295 } 4296 #endif 4297 default: 4298 /* not supported family type */ 4299 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4300 *error = EINVAL; 4301 return (NULL); 4302 } 4303 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4304 /* 4305 * If you have not performed a bind, then we need to do the 4306 * ephemeral bind for you. 4307 */ 4308 if ((err = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) { 4309 /* bind error, probably perm */ 4310 *error = err; 4311 return (NULL); 4312 } 4313 } 4314 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4315 if (stcb == NULL) { 4316 /* out of memory? */ 4317 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4318 *error = ENOMEM; 4319 return (NULL); 4320 } 4321 SCTP_INCR_ASOC_COUNT(); 4322 4323 memset(stcb, 0, sizeof(*stcb)); 4324 asoc = &stcb->asoc; 4325 4326 SCTP_TCB_LOCK_INIT(stcb); 4327 stcb->rport = rport; 4328 /* setup back pointer's */ 4329 stcb->sctp_ep = inp; 4330 stcb->sctp_socket = inp->sctp_socket; 4331 if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) { 4332 /* failed */ 4333 SCTP_TCB_LOCK_DESTROY(stcb); 4334 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4335 SCTP_DECR_ASOC_COUNT(); 4336 *error = err; 4337 return (NULL); 4338 } 4339 SCTP_TCB_LOCK(stcb); 4340 4341 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4342 /* now that my_vtag is set, add it to the hash */ 4343 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4344 /* put it in the bucket in the vtag hash of assoc's for the system */ 4345 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4346 4347 if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) { 4348 /* failure.. memory error? */ 4349 if (asoc->strmout) { 4350 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4351 asoc->strmout = NULL; 4352 } 4353 if (asoc->mapping_array) { 4354 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4355 asoc->mapping_array = NULL; 4356 } 4357 if (asoc->nr_mapping_array) { 4358 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4359 asoc->nr_mapping_array = NULL; 4360 } 4361 SCTP_DECR_ASOC_COUNT(); 4362 SCTP_TCB_UNLOCK(stcb); 4363 SCTP_TCB_LOCK_DESTROY(stcb); 4364 LIST_REMOVE(stcb, sctp_asocs); 4365 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4366 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4367 SCTP_INP_WUNLOCK(inp); 4368 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4369 *error = ENOBUFS; 4370 return (NULL); 4371 } 4372 /* Init all the timers */ 4373 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4374 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4375 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4376 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4377 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4378 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4379 4380 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4381 /* now file the port under the hash as well */ 4382 if (inp->sctp_tcbhash != NULL) { 4383 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4384 inp->sctp_hashmark)]; 4385 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4386 } 4387 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4388 sctp_initialize_auth_params(inp, stcb); 4389 } 4390 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4391 return (stcb); 4392 } 4393 4394 struct sctp_tcb * 4395 sctp_aloc_assoc(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 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4406 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4407 SCTP_INP_INFO_WUNLOCK(); 4408 SCTP_INP_WUNLOCK(inp); 4409 return (stcb); 4410 } 4411 4412 struct sctp_tcb * 4413 sctp_aloc_assoc_connected(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4414 int *error, uint32_t override_tag, uint32_t initial_tsn, 4415 uint32_t vrf_id, uint16_t o_streams, uint16_t port, 4416 struct thread *p, 4417 int initialize_auth_params) 4418 { 4419 struct sctp_tcb *stcb; 4420 4421 SCTP_INP_INFO_WLOCK(); 4422 SCTP_INP_WLOCK(inp); 4423 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 4424 SCTP_IS_LISTENING(inp)) { 4425 SCTP_INP_INFO_WUNLOCK(); 4426 SCTP_INP_WUNLOCK(inp); 4427 *error = EINVAL; 4428 return (NULL); 4429 } 4430 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, 4431 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); 4432 SCTP_INP_INFO_WUNLOCK(); 4433 if (stcb != NULL && (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4434 inp->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 4435 soisconnecting(inp->sctp_socket); 4436 } 4437 SCTP_INP_WUNLOCK(inp); 4438 return (stcb); 4439 } 4440 4441 void 4442 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4443 { 4444 struct sctp_inpcb *inp; 4445 struct sctp_association *asoc; 4446 4447 inp = stcb->sctp_ep; 4448 asoc = &stcb->asoc; 4449 asoc->numnets--; 4450 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4451 if (net == asoc->primary_destination) { 4452 /* Reset primary */ 4453 struct sctp_nets *lnet; 4454 4455 lnet = TAILQ_FIRST(&asoc->nets); 4456 /* 4457 * Mobility adaptation Ideally, if deleted destination is 4458 * the primary, it becomes a fast retransmission trigger by 4459 * the subsequent SET PRIMARY. (by micchie) 4460 */ 4461 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4462 SCTP_MOBILITY_BASE) || 4463 sctp_is_mobility_feature_on(stcb->sctp_ep, 4464 SCTP_MOBILITY_FASTHANDOFF)) { 4465 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4466 if (asoc->deleted_primary != NULL) { 4467 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4468 goto out; 4469 } 4470 asoc->deleted_primary = net; 4471 atomic_add_int(&net->ref_count, 1); 4472 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4473 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4474 sctp_mobility_feature_on(stcb->sctp_ep, 4475 SCTP_MOBILITY_PRIM_DELETED); 4476 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4477 stcb->sctp_ep, stcb, NULL); 4478 } 4479 out: 4480 /* Try to find a confirmed primary */ 4481 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4482 } 4483 if (net == asoc->last_data_chunk_from) { 4484 /* Reset primary */ 4485 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4486 } 4487 if (net == asoc->last_control_chunk_from) { 4488 /* Clear net */ 4489 asoc->last_control_chunk_from = NULL; 4490 } 4491 if (net == asoc->last_net_cmt_send_started) { 4492 /* Clear net */ 4493 asoc->last_net_cmt_send_started = NULL; 4494 } 4495 if (net == stcb->asoc.alternate) { 4496 sctp_free_remote_addr(stcb->asoc.alternate); 4497 stcb->asoc.alternate = NULL; 4498 } 4499 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4500 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4501 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4502 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4503 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4504 sctp_free_remote_addr(net); 4505 } 4506 4507 /* 4508 * remove a remote endpoint address from an association, it will fail if the 4509 * address does not exist. 4510 */ 4511 int 4512 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4513 { 4514 /* 4515 * Here we need to remove a remote address. This is quite simple, we 4516 * first find it in the list of address for the association 4517 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4518 * on that item. Note we do not allow it to be removed if there are 4519 * no other addresses. 4520 */ 4521 struct sctp_association *asoc; 4522 struct sctp_nets *net, *nnet; 4523 4524 asoc = &stcb->asoc; 4525 4526 /* locate the address */ 4527 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4528 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4529 continue; 4530 } 4531 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4532 remaddr)) { 4533 /* we found the guy */ 4534 if (asoc->numnets < 2) { 4535 /* Must have at LEAST two remote addresses */ 4536 return (-1); 4537 } else { 4538 sctp_remove_net(stcb, net); 4539 return (0); 4540 } 4541 } 4542 } 4543 /* not found. */ 4544 return (-2); 4545 } 4546 4547 static bool 4548 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport, uint32_t now) 4549 { 4550 struct sctpvtaghead *chain; 4551 struct sctp_tagblock *twait_block; 4552 int i; 4553 4554 SCTP_INP_INFO_LOCK_ASSERT(); 4555 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4556 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4557 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4558 if ((twait_block->vtag_block[i].tv_sec_at_expire >= now) && 4559 (twait_block->vtag_block[i].v_tag == tag) && 4560 (twait_block->vtag_block[i].lport == lport) && 4561 (twait_block->vtag_block[i].rport == rport)) { 4562 return (true); 4563 } 4564 } 4565 } 4566 return (false); 4567 } 4568 4569 static void 4570 sctp_set_vtag_block(struct sctp_timewait *vtag_block, uint32_t time, 4571 uint32_t tag, uint16_t lport, uint16_t rport) 4572 { 4573 vtag_block->tv_sec_at_expire = time; 4574 vtag_block->v_tag = tag; 4575 vtag_block->lport = lport; 4576 vtag_block->rport = rport; 4577 } 4578 4579 static void 4580 sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4581 { 4582 struct sctpvtaghead *chain; 4583 struct sctp_tagblock *twait_block; 4584 struct timeval now; 4585 uint32_t time; 4586 int i; 4587 bool set; 4588 4589 SCTP_INP_INFO_WLOCK_ASSERT(); 4590 (void)SCTP_GETTIME_TIMEVAL(&now); 4591 time = (uint32_t)now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait); 4592 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4593 set = false; 4594 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4595 /* Block(s) present, lets find space, and expire on the fly */ 4596 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4597 if ((twait_block->vtag_block[i].v_tag == 0) && !set) { 4598 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4599 set = true; 4600 continue; 4601 } 4602 if ((twait_block->vtag_block[i].v_tag != 0) && 4603 (twait_block->vtag_block[i].tv_sec_at_expire < (uint32_t)now.tv_sec)) { 4604 if (set) { 4605 /* Audit expires this guy */ 4606 sctp_set_vtag_block(twait_block->vtag_block + i, 0, 0, 0, 0); 4607 } else { 4608 /* Reuse it for the new tag */ 4609 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); 4610 set = true; 4611 } 4612 } 4613 } 4614 if (set) { 4615 /* 4616 * We only do up to the block where we can place our 4617 * tag for audits 4618 */ 4619 break; 4620 } 4621 } 4622 /* Need to add a new block to chain */ 4623 if (!set) { 4624 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4625 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4626 if (twait_block == NULL) { 4627 return; 4628 } 4629 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4630 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4631 sctp_set_vtag_block(twait_block->vtag_block, time, tag, lport, rport); 4632 } 4633 } 4634 4635 void 4636 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4637 { 4638 struct sctp_tmit_chunk *chk, *nchk; 4639 struct sctp_queued_to_read *control, *ncontrol; 4640 4641 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4642 TAILQ_REMOVE(rh, control, next_instrm); 4643 control->on_strm_q = 0; 4644 if (control->on_read_q == 0) { 4645 sctp_free_remote_addr(control->whoFrom); 4646 if (control->data) { 4647 sctp_m_freem(control->data); 4648 control->data = NULL; 4649 } 4650 } 4651 /* Reassembly free? */ 4652 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4653 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4654 if (chk->data) { 4655 sctp_m_freem(chk->data); 4656 chk->data = NULL; 4657 } 4658 if (chk->holds_key_ref) 4659 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4660 sctp_free_remote_addr(chk->whoTo); 4661 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4662 SCTP_DECR_CHK_COUNT(); 4663 /* sa_ignore FREED_MEMORY */ 4664 } 4665 /* 4666 * We don't free the address here since all the net's were 4667 * freed above. 4668 */ 4669 if (control->on_read_q == 0) { 4670 sctp_free_a_readq(stcb, control); 4671 } 4672 } 4673 } 4674 4675 /*- 4676 * Free the association after un-hashing the remote port. This 4677 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4678 * expect that the input to this function IS a locked TCB. 4679 * It will return 0, if it did NOT destroy the association (instead 4680 * it unlocks it. It will return NON-zero if it either destroyed the 4681 * association OR the association is already destroyed. 4682 */ 4683 int 4684 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4685 { 4686 int i; 4687 struct sctp_association *asoc; 4688 struct sctp_nets *net, *nnet; 4689 struct sctp_laddr *laddr, *naddr; 4690 struct sctp_tmit_chunk *chk, *nchk; 4691 struct sctp_asconf_addr *aparam, *naparam; 4692 struct sctp_asconf_ack *aack, *naack; 4693 struct sctp_stream_reset_list *strrst, *nstrrst; 4694 struct sctp_queued_to_read *sq, *nsq; 4695 struct sctp_stream_queue_pending *sp, *nsp; 4696 sctp_sharedkey_t *shared_key, *nshared_key; 4697 struct socket *so; 4698 4699 /* first, lets purge the entry from the hash table. */ 4700 SCTP_TCB_LOCK_ASSERT(stcb); 4701 4702 #ifdef SCTP_LOG_CLOSING 4703 sctp_log_closing(inp, stcb, 6); 4704 #endif 4705 if (stcb->asoc.state == 0) { 4706 #ifdef SCTP_LOG_CLOSING 4707 sctp_log_closing(inp, NULL, 7); 4708 #endif 4709 /* there is no asoc, really TSNH :-0 */ 4710 return (1); 4711 } 4712 if (stcb->asoc.alternate) { 4713 sctp_free_remote_addr(stcb->asoc.alternate); 4714 stcb->asoc.alternate = NULL; 4715 } 4716 /* TEMP CODE */ 4717 if (stcb->freed_from_where == 0) { 4718 /* Only record the first place free happened from */ 4719 stcb->freed_from_where = from_location; 4720 } 4721 /* TEMP CODE */ 4722 4723 asoc = &stcb->asoc; 4724 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4725 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4726 /* nothing around */ 4727 so = NULL; 4728 else 4729 so = inp->sctp_socket; 4730 4731 /* 4732 * We used timer based freeing if a reader or writer is in the way. 4733 * So we first check if we are actually being called from a timer, 4734 * if so we abort early if a reader or writer is still in the way. 4735 */ 4736 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4737 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4738 /* 4739 * is it the timer driving us? if so are the reader/writers 4740 * gone? 4741 */ 4742 if (stcb->asoc.refcnt) { 4743 /* nope, reader or writer in the way */ 4744 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4745 /* no asoc destroyed */ 4746 SCTP_TCB_UNLOCK(stcb); 4747 #ifdef SCTP_LOG_CLOSING 4748 sctp_log_closing(inp, stcb, 8); 4749 #endif 4750 return (0); 4751 } 4752 } 4753 /* Now clean up any other timers */ 4754 sctp_stop_association_timers(stcb, false); 4755 /* Now the read queue needs to be cleaned up (only once) */ 4756 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4757 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4758 SCTP_INP_READ_LOCK(inp); 4759 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4760 if (sq->stcb == stcb) { 4761 sq->do_not_ref_stcb = 1; 4762 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4763 /* 4764 * If there is no end, there never will be 4765 * now. 4766 */ 4767 if (sq->end_added == 0) { 4768 /* Held for PD-API clear that. */ 4769 sq->pdapi_aborted = 1; 4770 sq->held_length = 0; 4771 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4772 /* 4773 * Need to add a PD-API 4774 * aborted indication. 4775 * Setting the control_pdapi 4776 * assures that it will be 4777 * added right after this 4778 * msg. 4779 */ 4780 uint32_t strseq; 4781 4782 stcb->asoc.control_pdapi = sq; 4783 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4784 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4785 stcb, 4786 SCTP_PARTIAL_DELIVERY_ABORTED, 4787 (void *)&strseq, 4788 SCTP_SO_LOCKED); 4789 stcb->asoc.control_pdapi = NULL; 4790 } 4791 } 4792 /* Add an end to wake them */ 4793 sq->end_added = 1; 4794 } 4795 } 4796 SCTP_INP_READ_UNLOCK(inp); 4797 if (stcb->block_entry) { 4798 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4799 stcb->block_entry->error = ECONNRESET; 4800 stcb->block_entry = NULL; 4801 } 4802 } 4803 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4804 /* 4805 * Someone holds a reference OR the socket is unaccepted 4806 * yet. 4807 */ 4808 if ((stcb->asoc.refcnt) || 4809 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4810 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4811 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4812 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4813 } 4814 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4815 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4816 /* nothing around */ 4817 so = NULL; 4818 if (so) { 4819 /* Wake any reader/writers */ 4820 sctp_sorwakeup(inp, so); 4821 sctp_sowwakeup(inp, so); 4822 } 4823 SCTP_TCB_UNLOCK(stcb); 4824 4825 #ifdef SCTP_LOG_CLOSING 4826 sctp_log_closing(inp, stcb, 9); 4827 #endif 4828 /* no asoc destroyed */ 4829 return (0); 4830 } 4831 #ifdef SCTP_LOG_CLOSING 4832 sctp_log_closing(inp, stcb, 10); 4833 #endif 4834 /* 4835 * When I reach here, no others want to kill the assoc yet.. and I 4836 * own the lock. Now its possible an abort comes in when I do the 4837 * lock exchange below to grab all the locks to do the final take 4838 * out. to prevent this we increment the count, which will start a 4839 * timer and blow out above thus assuring us that we hold exclusive 4840 * killing of the asoc. Note that after getting back the TCB lock we 4841 * will go ahead and increment the counter back up and stop any 4842 * timer a passing stranger may have started :-S 4843 */ 4844 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4845 atomic_add_int(&stcb->asoc.refcnt, 1); 4846 4847 SCTP_TCB_UNLOCK(stcb); 4848 SCTP_INP_INFO_WLOCK(); 4849 SCTP_INP_WLOCK(inp); 4850 SCTP_TCB_LOCK(stcb); 4851 } 4852 /* Double check the GONE flag */ 4853 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4854 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4855 /* nothing around */ 4856 so = NULL; 4857 4858 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4859 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4860 /* 4861 * For TCP type we need special handling when we are 4862 * connected. We also include the peel'ed off ones to. 4863 */ 4864 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4865 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4866 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4867 if (so) { 4868 SOCKBUF_LOCK(&so->so_rcv); 4869 so->so_state &= ~(SS_ISCONNECTING | 4870 SS_ISDISCONNECTING | 4871 SS_ISCONFIRMING | 4872 SS_ISCONNECTED); 4873 so->so_state |= SS_ISDISCONNECTED; 4874 socantrcvmore_locked(so); 4875 socantsendmore(so); 4876 sctp_sowwakeup(inp, so); 4877 sctp_sorwakeup(inp, so); 4878 SCTP_SOWAKEUP(so); 4879 } 4880 } 4881 } 4882 4883 /* 4884 * Make it invalid too, that way if its about to run it will abort 4885 * and return. 4886 */ 4887 /* re-increment the lock */ 4888 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4889 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4890 } 4891 if (stcb->asoc.refcnt) { 4892 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4893 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4894 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4895 SCTP_INP_INFO_WUNLOCK(); 4896 SCTP_INP_WUNLOCK(inp); 4897 } 4898 SCTP_TCB_UNLOCK(stcb); 4899 return (0); 4900 } 4901 asoc->state = 0; 4902 if (inp->sctp_tcbhash) { 4903 LIST_REMOVE(stcb, sctp_tcbhash); 4904 } 4905 if (stcb->asoc.in_asocid_hash) { 4906 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4907 } 4908 if (inp->sctp_socket == NULL) { 4909 stcb->sctp_socket = NULL; 4910 } 4911 /* Now lets remove it from the list of ALL associations in the EP */ 4912 LIST_REMOVE(stcb, sctp_tcblist); 4913 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4914 SCTP_INP_INCR_REF(inp); 4915 SCTP_INP_WUNLOCK(inp); 4916 } 4917 /* pull from vtag hash */ 4918 LIST_REMOVE(stcb, sctp_asocs); 4919 sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport); 4920 4921 /* 4922 * Now restop the timers to be sure this is paranoia at is finest! 4923 */ 4924 sctp_stop_association_timers(stcb, true); 4925 4926 /* 4927 * The chunk lists and such SHOULD be empty but we check them just 4928 * in case. 4929 */ 4930 /* anything on the wheel needs to be removed */ 4931 for (i = 0; i < asoc->streamoutcnt; i++) { 4932 struct sctp_stream_out *outs; 4933 4934 outs = &asoc->strmout[i]; 4935 /* now clean up any chunks here */ 4936 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4937 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4938 TAILQ_REMOVE(&outs->outqueue, sp, next); 4939 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp); 4940 sctp_free_spbufspace(stcb, asoc, sp); 4941 if (sp->data) { 4942 if (so) { 4943 /* Still an open socket - report */ 4944 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4945 0, (void *)sp, SCTP_SO_LOCKED); 4946 } 4947 if (sp->data) { 4948 sctp_m_freem(sp->data); 4949 sp->data = NULL; 4950 sp->tail_mbuf = NULL; 4951 sp->length = 0; 4952 } 4953 } 4954 if (sp->net) { 4955 sctp_free_remote_addr(sp->net); 4956 sp->net = NULL; 4957 } 4958 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4959 } 4960 } 4961 /* sa_ignore FREED_MEMORY */ 4962 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4963 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4964 SCTP_FREE(strrst, SCTP_M_STRESET); 4965 } 4966 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4967 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4968 if (sq->data) { 4969 sctp_m_freem(sq->data); 4970 sq->data = NULL; 4971 } 4972 sctp_free_remote_addr(sq->whoFrom); 4973 sq->whoFrom = NULL; 4974 sq->stcb = NULL; 4975 /* Free the ctl entry */ 4976 sctp_free_a_readq(stcb, sq); 4977 /* sa_ignore FREED_MEMORY */ 4978 } 4979 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4980 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4981 if (chk->data) { 4982 sctp_m_freem(chk->data); 4983 chk->data = NULL; 4984 } 4985 if (chk->holds_key_ref) 4986 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4987 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4988 SCTP_DECR_CHK_COUNT(); 4989 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4990 asoc->free_chunk_cnt--; 4991 /* sa_ignore FREED_MEMORY */ 4992 } 4993 /* pending send queue SHOULD be empty */ 4994 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4995 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 4996 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 4997 #ifdef INVARIANTS 4998 } else { 4999 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5000 #endif 5001 } 5002 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5003 if (chk->data) { 5004 if (so) { 5005 /* Still a socket? */ 5006 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5007 0, chk, SCTP_SO_LOCKED); 5008 } 5009 if (chk->data) { 5010 sctp_m_freem(chk->data); 5011 chk->data = NULL; 5012 } 5013 } 5014 if (chk->holds_key_ref) 5015 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5016 if (chk->whoTo) { 5017 sctp_free_remote_addr(chk->whoTo); 5018 chk->whoTo = NULL; 5019 } 5020 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5021 SCTP_DECR_CHK_COUNT(); 5022 /* sa_ignore FREED_MEMORY */ 5023 } 5024 /* sent queue SHOULD be empty */ 5025 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5026 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5027 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5028 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5029 #ifdef INVARIANTS 5030 } else { 5031 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5032 #endif 5033 } 5034 } 5035 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5036 if (chk->data) { 5037 if (so) { 5038 /* Still a socket? */ 5039 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5040 0, chk, SCTP_SO_LOCKED); 5041 } 5042 if (chk->data) { 5043 sctp_m_freem(chk->data); 5044 chk->data = NULL; 5045 } 5046 } 5047 if (chk->holds_key_ref) 5048 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5049 sctp_free_remote_addr(chk->whoTo); 5050 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5051 SCTP_DECR_CHK_COUNT(); 5052 /* sa_ignore FREED_MEMORY */ 5053 } 5054 #ifdef INVARIANTS 5055 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5056 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5057 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5058 } 5059 } 5060 #endif 5061 /* control queue MAY not be empty */ 5062 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5063 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5064 if (chk->data) { 5065 sctp_m_freem(chk->data); 5066 chk->data = NULL; 5067 } 5068 if (chk->holds_key_ref) 5069 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5070 sctp_free_remote_addr(chk->whoTo); 5071 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5072 SCTP_DECR_CHK_COUNT(); 5073 /* sa_ignore FREED_MEMORY */ 5074 } 5075 /* ASCONF queue MAY not be empty */ 5076 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5077 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5078 if (chk->data) { 5079 sctp_m_freem(chk->data); 5080 chk->data = NULL; 5081 } 5082 if (chk->holds_key_ref) 5083 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5084 sctp_free_remote_addr(chk->whoTo); 5085 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5086 SCTP_DECR_CHK_COUNT(); 5087 /* sa_ignore FREED_MEMORY */ 5088 } 5089 if (asoc->mapping_array) { 5090 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5091 asoc->mapping_array = NULL; 5092 } 5093 if (asoc->nr_mapping_array) { 5094 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5095 asoc->nr_mapping_array = NULL; 5096 } 5097 /* the stream outs */ 5098 if (asoc->strmout) { 5099 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5100 asoc->strmout = NULL; 5101 } 5102 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5103 if (asoc->strmin) { 5104 for (i = 0; i < asoc->streamincnt; i++) { 5105 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5106 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5107 } 5108 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5109 asoc->strmin = NULL; 5110 } 5111 asoc->streamincnt = 0; 5112 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5113 #ifdef INVARIANTS 5114 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5115 panic("no net's left alloc'ed, or list points to itself"); 5116 } 5117 #endif 5118 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5119 sctp_free_remote_addr(net); 5120 } 5121 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5122 /* sa_ignore FREED_MEMORY */ 5123 sctp_remove_laddr(laddr); 5124 } 5125 5126 /* pending asconf (address) parameters */ 5127 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5128 /* sa_ignore FREED_MEMORY */ 5129 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5130 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5131 } 5132 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5133 /* sa_ignore FREED_MEMORY */ 5134 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5135 if (aack->data != NULL) { 5136 sctp_m_freem(aack->data); 5137 } 5138 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5139 } 5140 /* clean up auth stuff */ 5141 if (asoc->local_hmacs) 5142 sctp_free_hmaclist(asoc->local_hmacs); 5143 if (asoc->peer_hmacs) 5144 sctp_free_hmaclist(asoc->peer_hmacs); 5145 5146 if (asoc->local_auth_chunks) 5147 sctp_free_chunklist(asoc->local_auth_chunks); 5148 if (asoc->peer_auth_chunks) 5149 sctp_free_chunklist(asoc->peer_auth_chunks); 5150 5151 sctp_free_authinfo(&asoc->authinfo); 5152 5153 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5154 LIST_REMOVE(shared_key, next); 5155 sctp_free_sharedkey(shared_key); 5156 /* sa_ignore FREED_MEMORY */ 5157 } 5158 5159 /* Insert new items here :> */ 5160 5161 /* Get rid of LOCK */ 5162 SCTP_TCB_UNLOCK(stcb); 5163 SCTP_TCB_LOCK_DESTROY(stcb); 5164 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5165 SCTP_INP_INFO_WUNLOCK(); 5166 SCTP_INP_RLOCK(inp); 5167 } 5168 #ifdef SCTP_TRACK_FREED_ASOCS 5169 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5170 /* now clean up the tasoc itself */ 5171 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5172 SCTP_DECR_ASOC_COUNT(); 5173 } else { 5174 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5175 } 5176 #else 5177 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5178 SCTP_DECR_ASOC_COUNT(); 5179 #endif 5180 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5181 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5182 /* 5183 * If its NOT the inp_free calling us AND sctp_close 5184 * as been called, we call back... 5185 */ 5186 SCTP_INP_RUNLOCK(inp); 5187 /* 5188 * This will start the kill timer (if we are the 5189 * last one) since we hold an increment yet. But 5190 * this is the only safe way to do this since 5191 * otherwise if the socket closes at the same time 5192 * we are here we might collide in the cleanup. 5193 */ 5194 sctp_inpcb_free(inp, 5195 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5196 SCTP_CALLED_DIRECTLY_NOCMPSET); 5197 SCTP_INP_DECR_REF(inp); 5198 } else { 5199 /* The socket is still open. */ 5200 SCTP_INP_DECR_REF(inp); 5201 SCTP_INP_RUNLOCK(inp); 5202 } 5203 } 5204 /* destroyed the asoc */ 5205 #ifdef SCTP_LOG_CLOSING 5206 sctp_log_closing(inp, NULL, 11); 5207 #endif 5208 return (1); 5209 } 5210 5211 /* 5212 * determine if a destination is "reachable" based upon the addresses bound 5213 * to the current endpoint (e.g. only v4 or v6 currently bound) 5214 */ 5215 /* 5216 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5217 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5218 * types bound as its endpoint 5219 */ 5220 int 5221 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5222 { 5223 struct sctp_inpcb *inp; 5224 int answer; 5225 5226 /* 5227 * No locks here, the TCB, in all cases is already locked and an 5228 * assoc is up. There is either a INP lock by the caller applied (in 5229 * asconf case when deleting an address) or NOT in the HB case, 5230 * however if HB then the INP increment is up and the INP will not 5231 * be removed (on top of the fact that we have a TCB lock). So we 5232 * only want to read the sctp_flags, which is either bound-all or 5233 * not.. no protection needed since once an assoc is up you can't be 5234 * changing your binding. 5235 */ 5236 inp = stcb->sctp_ep; 5237 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5238 /* if bound all, destination is not restricted */ 5239 /* 5240 * RRS: Question during lock work: Is this correct? If you 5241 * are bound-all you still might need to obey the V4--V6 5242 * flags??? IMO this bound-all stuff needs to be removed! 5243 */ 5244 return (1); 5245 } 5246 /* NOTE: all "scope" checks are done when local addresses are added */ 5247 switch (destaddr->sa_family) { 5248 #ifdef INET6 5249 case AF_INET6: 5250 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5251 break; 5252 #endif 5253 #ifdef INET 5254 case AF_INET: 5255 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5256 break; 5257 #endif 5258 default: 5259 /* invalid family, so it's unreachable */ 5260 answer = 0; 5261 break; 5262 } 5263 return (answer); 5264 } 5265 5266 /* 5267 * update the inp_vflags on an endpoint 5268 */ 5269 static void 5270 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5271 { 5272 struct sctp_laddr *laddr; 5273 5274 /* first clear the flag */ 5275 inp->ip_inp.inp.inp_vflag = 0; 5276 /* set the flag based on addresses on the ep list */ 5277 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5278 if (laddr->ifa == NULL) { 5279 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5280 __func__); 5281 continue; 5282 } 5283 5284 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5285 continue; 5286 } 5287 switch (laddr->ifa->address.sa.sa_family) { 5288 #ifdef INET6 5289 case AF_INET6: 5290 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5291 break; 5292 #endif 5293 #ifdef INET 5294 case AF_INET: 5295 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5296 break; 5297 #endif 5298 default: 5299 break; 5300 } 5301 } 5302 } 5303 5304 /* 5305 * Add the address to the endpoint local address list There is nothing to be 5306 * done if we are bound to all addresses 5307 */ 5308 void 5309 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5310 { 5311 struct sctp_laddr *laddr; 5312 struct sctp_tcb *stcb; 5313 int fnd, error = 0; 5314 5315 fnd = 0; 5316 5317 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5318 /* You are already bound to all. You have it already */ 5319 return; 5320 } 5321 #ifdef INET6 5322 if (ifa->address.sa.sa_family == AF_INET6) { 5323 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5324 /* Can't bind a non-useable addr. */ 5325 return; 5326 } 5327 } 5328 #endif 5329 /* first, is it already present? */ 5330 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5331 if (laddr->ifa == ifa) { 5332 fnd = 1; 5333 break; 5334 } 5335 } 5336 5337 if (fnd == 0) { 5338 /* Not in the ep list */ 5339 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5340 if (error != 0) 5341 return; 5342 inp->laddr_count++; 5343 /* update inp_vflag flags */ 5344 switch (ifa->address.sa.sa_family) { 5345 #ifdef INET6 5346 case AF_INET6: 5347 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5348 break; 5349 #endif 5350 #ifdef INET 5351 case AF_INET: 5352 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5353 break; 5354 #endif 5355 default: 5356 break; 5357 } 5358 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5359 sctp_add_local_addr_restricted(stcb, ifa); 5360 } 5361 } 5362 return; 5363 } 5364 5365 /* 5366 * select a new (hopefully reachable) destination net (should only be used 5367 * when we deleted an ep addr that is the only usable source address to reach 5368 * the destination net) 5369 */ 5370 static void 5371 sctp_select_primary_destination(struct sctp_tcb *stcb) 5372 { 5373 struct sctp_nets *net; 5374 5375 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5376 /* for now, we'll just pick the first reachable one we find */ 5377 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5378 continue; 5379 if (sctp_destination_is_reachable(stcb, 5380 (struct sockaddr *)&net->ro._l_addr)) { 5381 /* found a reachable destination */ 5382 stcb->asoc.primary_destination = net; 5383 } 5384 } 5385 /* I can't there from here! ...we're gonna die shortly... */ 5386 } 5387 5388 /* 5389 * Delete the address from the endpoint local address list. There is nothing 5390 * to be done if we are bound to all addresses 5391 */ 5392 void 5393 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5394 { 5395 struct sctp_laddr *laddr; 5396 int fnd; 5397 5398 fnd = 0; 5399 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5400 /* You are already bound to all. You have it already */ 5401 return; 5402 } 5403 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5404 if (laddr->ifa == ifa) { 5405 fnd = 1; 5406 break; 5407 } 5408 } 5409 if (fnd && (inp->laddr_count < 2)) { 5410 /* can't delete unless there are at LEAST 2 addresses */ 5411 return; 5412 } 5413 if (fnd) { 5414 /* 5415 * clean up any use of this address go through our 5416 * associations and clear any last_used_address that match 5417 * this one for each assoc, see if a new primary_destination 5418 * is needed 5419 */ 5420 struct sctp_tcb *stcb; 5421 5422 /* clean up "next_addr_touse" */ 5423 if (inp->next_addr_touse == laddr) 5424 /* delete this address */ 5425 inp->next_addr_touse = NULL; 5426 5427 /* clean up "last_used_address" */ 5428 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5429 struct sctp_nets *net; 5430 5431 SCTP_TCB_LOCK(stcb); 5432 if (stcb->asoc.last_used_address == laddr) 5433 /* delete this address */ 5434 stcb->asoc.last_used_address = NULL; 5435 /* 5436 * Now spin through all the nets and purge any ref 5437 * to laddr 5438 */ 5439 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5440 if (net->ro._s_addr == laddr->ifa) { 5441 /* Yep, purge src address selected */ 5442 RO_NHFREE(&net->ro); 5443 sctp_free_ifa(net->ro._s_addr); 5444 net->ro._s_addr = NULL; 5445 net->src_addr_selected = 0; 5446 } 5447 } 5448 SCTP_TCB_UNLOCK(stcb); 5449 } /* for each tcb */ 5450 /* remove it from the ep list */ 5451 sctp_remove_laddr(laddr); 5452 inp->laddr_count--; 5453 /* update inp_vflag flags */ 5454 sctp_update_ep_vflag(inp); 5455 } 5456 return; 5457 } 5458 5459 /* 5460 * Add the address to the TCB local address restricted list. 5461 * This is a "pending" address list (eg. addresses waiting for an 5462 * ASCONF-ACK response) and cannot be used as a valid source address. 5463 */ 5464 void 5465 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5466 { 5467 struct sctp_laddr *laddr; 5468 struct sctpladdr *list; 5469 5470 /* 5471 * Assumes TCB is locked.. and possibly the INP. May need to 5472 * confirm/fix that if we need it and is not the case. 5473 */ 5474 list = &stcb->asoc.sctp_restricted_addrs; 5475 5476 #ifdef INET6 5477 if (ifa->address.sa.sa_family == AF_INET6) { 5478 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5479 /* Can't bind a non-existent addr. */ 5480 return; 5481 } 5482 } 5483 #endif 5484 /* does the address already exist? */ 5485 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5486 if (laddr->ifa == ifa) { 5487 return; 5488 } 5489 } 5490 5491 /* add to the list */ 5492 (void)sctp_insert_laddr(list, ifa, 0); 5493 return; 5494 } 5495 5496 /* 5497 * Remove a local address from the TCB local address restricted list 5498 */ 5499 void 5500 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5501 { 5502 struct sctp_inpcb *inp; 5503 struct sctp_laddr *laddr; 5504 5505 /* 5506 * This is called by asconf work. It is assumed that a) The TCB is 5507 * locked and b) The INP is locked. This is true in as much as I can 5508 * trace through the entry asconf code where I did these locks. 5509 * Again, the ASCONF code is a bit different in that it does lock 5510 * the INP during its work often times. This must be since we don't 5511 * want other proc's looking up things while what they are looking 5512 * up is changing :-D 5513 */ 5514 5515 inp = stcb->sctp_ep; 5516 /* if subset bound and don't allow ASCONF's, can't delete last */ 5517 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5518 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5519 if (stcb->sctp_ep->laddr_count < 2) { 5520 /* can't delete last address */ 5521 return; 5522 } 5523 } 5524 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5525 /* remove the address if it exists */ 5526 if (laddr->ifa == NULL) 5527 continue; 5528 if (laddr->ifa == ifa) { 5529 sctp_remove_laddr(laddr); 5530 return; 5531 } 5532 } 5533 5534 /* address not found! */ 5535 return; 5536 } 5537 5538 /* sysctl */ 5539 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5540 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5541 5542 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5543 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5544 int *sctp_cpuarry = NULL; 5545 5546 void 5547 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5548 { 5549 /* Queue a packet to a processor for the specified core */ 5550 struct sctp_mcore_queue *qent; 5551 struct sctp_mcore_ctrl *wkq; 5552 int need_wake = 0; 5553 5554 if (sctp_mcore_workers == NULL) { 5555 /* Something went way bad during setup */ 5556 sctp_input_with_port(m, off, 0); 5557 return; 5558 } 5559 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5560 (sizeof(struct sctp_mcore_queue)), 5561 SCTP_M_MCORE); 5562 if (qent == NULL) { 5563 /* This is trouble */ 5564 sctp_input_with_port(m, off, 0); 5565 return; 5566 } 5567 qent->vn = curvnet; 5568 qent->m = m; 5569 qent->off = off; 5570 qent->v6 = 0; 5571 wkq = &sctp_mcore_workers[cpu_to_use]; 5572 SCTP_MCORE_QLOCK(wkq); 5573 5574 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5575 if (wkq->running == 0) { 5576 need_wake = 1; 5577 } 5578 SCTP_MCORE_QUNLOCK(wkq); 5579 if (need_wake) { 5580 wakeup(&wkq->running); 5581 } 5582 } 5583 5584 static void 5585 sctp_mcore_thread(void *arg) 5586 { 5587 5588 struct sctp_mcore_ctrl *wkq; 5589 struct sctp_mcore_queue *qent; 5590 5591 wkq = (struct sctp_mcore_ctrl *)arg; 5592 struct mbuf *m; 5593 int off, v6; 5594 5595 /* Wait for first tickle */ 5596 SCTP_MCORE_LOCK(wkq); 5597 wkq->running = 0; 5598 msleep(&wkq->running, 5599 &wkq->core_mtx, 5600 0, "wait for pkt", 0); 5601 SCTP_MCORE_UNLOCK(wkq); 5602 5603 /* Bind to our cpu */ 5604 thread_lock(curthread); 5605 sched_bind(curthread, wkq->cpuid); 5606 thread_unlock(curthread); 5607 5608 /* Now lets start working */ 5609 SCTP_MCORE_LOCK(wkq); 5610 /* Now grab lock and go */ 5611 for (;;) { 5612 SCTP_MCORE_QLOCK(wkq); 5613 skip_sleep: 5614 wkq->running = 1; 5615 qent = TAILQ_FIRST(&wkq->que); 5616 if (qent) { 5617 TAILQ_REMOVE(&wkq->que, qent, next); 5618 SCTP_MCORE_QUNLOCK(wkq); 5619 CURVNET_SET(qent->vn); 5620 m = qent->m; 5621 off = qent->off; 5622 v6 = qent->v6; 5623 SCTP_FREE(qent, SCTP_M_MCORE); 5624 if (v6 == 0) { 5625 sctp_input_with_port(m, off, 0); 5626 } else { 5627 SCTP_PRINTF("V6 not yet supported\n"); 5628 sctp_m_freem(m); 5629 } 5630 CURVNET_RESTORE(); 5631 SCTP_MCORE_QLOCK(wkq); 5632 } 5633 wkq->running = 0; 5634 if (!TAILQ_EMPTY(&wkq->que)) { 5635 goto skip_sleep; 5636 } 5637 SCTP_MCORE_QUNLOCK(wkq); 5638 msleep(&wkq->running, 5639 &wkq->core_mtx, 5640 0, "wait for pkt", 0); 5641 } 5642 } 5643 5644 static void 5645 sctp_startup_mcore_threads(void) 5646 { 5647 int i, cpu; 5648 5649 if (mp_ncpus == 1) 5650 return; 5651 5652 if (sctp_mcore_workers != NULL) { 5653 /* 5654 * Already been here in some previous vnet? 5655 */ 5656 return; 5657 } 5658 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5659 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5660 SCTP_M_MCORE); 5661 if (sctp_mcore_workers == NULL) { 5662 /* TSNH I hope */ 5663 return; 5664 } 5665 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5666 sizeof(struct sctp_mcore_ctrl))); 5667 /* Init the structures */ 5668 for (i = 0; i <= mp_maxid; i++) { 5669 TAILQ_INIT(&sctp_mcore_workers[i].que); 5670 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5671 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5672 sctp_mcore_workers[i].cpuid = i; 5673 } 5674 if (sctp_cpuarry == NULL) { 5675 SCTP_MALLOC(sctp_cpuarry, int *, 5676 (mp_ncpus * sizeof(int)), 5677 SCTP_M_MCORE); 5678 i = 0; 5679 CPU_FOREACH(cpu) { 5680 sctp_cpuarry[i] = cpu; 5681 i++; 5682 } 5683 } 5684 /* Now start them all */ 5685 CPU_FOREACH(cpu) { 5686 (void)kproc_create(sctp_mcore_thread, 5687 (void *)&sctp_mcore_workers[cpu], 5688 &sctp_mcore_workers[cpu].thread_proc, 5689 0, 5690 SCTP_KTHREAD_PAGES, 5691 SCTP_MCORE_NAME); 5692 } 5693 } 5694 #endif 5695 5696 void 5697 sctp_pcb_init(void) 5698 { 5699 /* 5700 * SCTP initialization for the PCB structures should be called by 5701 * the sctp_init() function. 5702 */ 5703 int i; 5704 struct timeval tv; 5705 5706 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5707 /* error I was called twice */ 5708 return; 5709 } 5710 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5711 5712 #if defined(SCTP_LOCAL_TRACE_BUF) 5713 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5714 #endif 5715 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5716 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5717 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5718 SCTP_M_MCORE); 5719 #endif 5720 (void)SCTP_GETTIME_TIMEVAL(&tv); 5721 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5722 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5723 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5724 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5725 #else 5726 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5727 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5728 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5729 #endif 5730 /* init the empty list of (All) Endpoints */ 5731 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5732 5733 /* init the hash table of endpoints */ 5734 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5735 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5736 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5737 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5738 &SCTP_BASE_INFO(hashasocmark)); 5739 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5740 &SCTP_BASE_INFO(hashmark)); 5741 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5742 &SCTP_BASE_INFO(hashtcpmark)); 5743 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5744 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5745 &SCTP_BASE_INFO(hashvrfmark)); 5746 5747 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5748 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5749 /* init the zones */ 5750 /* 5751 * FIX ME: Should check for NULL returns, but if it does fail we are 5752 * doomed to panic anyways... add later maybe. 5753 */ 5754 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5755 sizeof(struct sctp_inpcb), maxsockets); 5756 5757 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5758 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5759 5760 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5761 sizeof(struct sctp_laddr), 5762 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5763 5764 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5765 sizeof(struct sctp_nets), 5766 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5767 5768 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5769 sizeof(struct sctp_tmit_chunk), 5770 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5771 5772 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5773 sizeof(struct sctp_queued_to_read), 5774 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5775 5776 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5777 sizeof(struct sctp_stream_queue_pending), 5778 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5779 5780 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5781 sizeof(struct sctp_asconf), 5782 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5783 5784 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5785 sizeof(struct sctp_asconf_ack), 5786 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5787 5788 /* Master Lock INIT for info structure */ 5789 SCTP_INP_INFO_LOCK_INIT(); 5790 SCTP_STATLOG_INIT_LOCK(); 5791 5792 SCTP_IPI_COUNT_INIT(); 5793 SCTP_IPI_ADDR_INIT(); 5794 #ifdef SCTP_PACKET_LOGGING 5795 SCTP_IP_PKTLOG_INIT(); 5796 #endif 5797 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5798 5799 SCTP_WQ_ADDR_INIT(); 5800 /* not sure if we need all the counts */ 5801 SCTP_BASE_INFO(ipi_count_ep) = 0; 5802 /* assoc/tcb zone info */ 5803 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5804 /* local addrlist zone info */ 5805 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5806 /* remote addrlist zone info */ 5807 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5808 /* chunk info */ 5809 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5810 5811 /* socket queue zone info */ 5812 SCTP_BASE_INFO(ipi_count_readq) = 0; 5813 5814 /* stream out queue cont */ 5815 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5816 5817 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5818 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5819 5820 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5821 5822 /* Init the TIMEWAIT list */ 5823 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5824 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5825 } 5826 sctp_startup_iterator(); 5827 5828 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 5829 sctp_startup_mcore_threads(); 5830 #endif 5831 5832 /* 5833 * INIT the default VRF which for BSD is the only one, other O/S's 5834 * may have more. But initially they must start with one and then 5835 * add the VRF's as addresses are added. 5836 */ 5837 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5838 } 5839 5840 /* 5841 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5842 */ 5843 void 5844 sctp_pcb_finish(void) 5845 { 5846 struct sctp_vrflist *vrf_bucket; 5847 struct sctp_vrf *vrf, *nvrf; 5848 struct sctp_ifn *ifn, *nifn; 5849 struct sctp_ifa *ifa, *nifa; 5850 struct sctpvtaghead *chain; 5851 struct sctp_tagblock *twait_block, *prev_twait_block; 5852 struct sctp_laddr *wi, *nwi; 5853 int i; 5854 struct sctp_iterator *it, *nit; 5855 5856 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5857 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5858 return; 5859 } 5860 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5861 /* 5862 * In FreeBSD the iterator thread never exits but we do clean up. 5863 * The only way FreeBSD reaches here is if we have VRF's but we 5864 * still add the ifdef to make it compile on old versions. 5865 */ 5866 retry: 5867 SCTP_IPI_ITERATOR_WQ_LOCK(); 5868 /* 5869 * sctp_iterator_worker() might be working on an it entry without 5870 * holding the lock. We won't find it on the list either and 5871 * continue and free/destroy it. While holding the lock, spin, to 5872 * avoid the race condition as sctp_iterator_worker() will have to 5873 * wait to re-acquire the lock. 5874 */ 5875 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5876 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5877 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5878 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5879 DELAY(10); 5880 goto retry; 5881 } 5882 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5883 if (it->vn != curvnet) { 5884 continue; 5885 } 5886 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5887 if (it->function_atend != NULL) { 5888 (*it->function_atend) (it->pointer, it->val); 5889 } 5890 SCTP_FREE(it, SCTP_M_ITER); 5891 } 5892 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5893 SCTP_ITERATOR_LOCK(); 5894 if ((sctp_it_ctl.cur_it) && 5895 (sctp_it_ctl.cur_it->vn == curvnet)) { 5896 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5897 } 5898 SCTP_ITERATOR_UNLOCK(); 5899 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5900 SCTP_WQ_ADDR_LOCK(); 5901 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5902 LIST_REMOVE(wi, sctp_nxt_addr); 5903 SCTP_DECR_LADDR_COUNT(); 5904 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5905 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5906 } 5907 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5908 } 5909 SCTP_WQ_ADDR_UNLOCK(); 5910 5911 /* 5912 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5913 * destroyed first). 5914 */ 5915 SCTP_IPI_ADDR_WLOCK(); 5916 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5917 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5918 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5919 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5920 /* free the ifa */ 5921 LIST_REMOVE(ifa, next_bucket); 5922 LIST_REMOVE(ifa, next_ifa); 5923 SCTP_FREE(ifa, SCTP_M_IFA); 5924 } 5925 /* free the ifn */ 5926 LIST_REMOVE(ifn, next_bucket); 5927 LIST_REMOVE(ifn, next_ifn); 5928 SCTP_FREE(ifn, SCTP_M_IFN); 5929 } 5930 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5931 /* free the vrf */ 5932 LIST_REMOVE(vrf, next_vrf); 5933 SCTP_FREE(vrf, SCTP_M_VRF); 5934 } 5935 SCTP_IPI_ADDR_WUNLOCK(); 5936 /* free the vrf hashes */ 5937 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5938 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5939 5940 /* 5941 * free the TIMEWAIT list elements malloc'd in the function 5942 * sctp_add_vtag_to_timewait()... 5943 */ 5944 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5945 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5946 if (!LIST_EMPTY(chain)) { 5947 prev_twait_block = NULL; 5948 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5949 if (prev_twait_block) { 5950 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5951 } 5952 prev_twait_block = twait_block; 5953 } 5954 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5955 } 5956 } 5957 5958 /* free the locks and mutexes */ 5959 #ifdef SCTP_PACKET_LOGGING 5960 SCTP_IP_PKTLOG_DESTROY(); 5961 #endif 5962 SCTP_IPI_ADDR_DESTROY(); 5963 SCTP_STATLOG_DESTROY(); 5964 SCTP_INP_INFO_LOCK_DESTROY(); 5965 5966 SCTP_WQ_ADDR_DESTROY(); 5967 5968 /* Get rid of other stuff too. */ 5969 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5970 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5971 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5972 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5973 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5974 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5975 5976 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5977 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5978 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5979 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5980 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5981 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5982 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5983 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5984 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5985 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5986 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5987 #endif 5988 } 5989 5990 int 5991 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5992 int offset, int limit, 5993 struct sockaddr *src, struct sockaddr *dst, 5994 struct sockaddr *altsa, uint16_t port) 5995 { 5996 /* 5997 * grub through the INIT pulling addresses and loading them to the 5998 * nets structure in the asoc. The from address in the mbuf should 5999 * also be loaded (if it is not already). This routine can be called 6000 * with either INIT or INIT-ACK's as long as the m points to the IP 6001 * packet and the offset points to the beginning of the parameters. 6002 */ 6003 struct sctp_inpcb *inp; 6004 struct sctp_nets *net, *nnet, *net_tmp; 6005 struct sctp_paramhdr *phdr, param_buf; 6006 struct sctp_tcb *stcb_tmp; 6007 uint16_t ptype, plen; 6008 struct sockaddr *sa; 6009 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6010 struct sctp_auth_random *p_random = NULL; 6011 uint16_t random_len = 0; 6012 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6013 struct sctp_auth_hmac_algo *hmacs = NULL; 6014 uint16_t hmacs_len = 0; 6015 uint8_t saw_asconf = 0; 6016 uint8_t saw_asconf_ack = 0; 6017 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6018 struct sctp_auth_chunk_list *chunks = NULL; 6019 uint16_t num_chunks = 0; 6020 sctp_key_t *new_key; 6021 uint32_t keylen; 6022 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6023 uint8_t peer_supports_ecn; 6024 uint8_t peer_supports_prsctp; 6025 uint8_t peer_supports_auth; 6026 uint8_t peer_supports_asconf; 6027 uint8_t peer_supports_asconf_ack; 6028 uint8_t peer_supports_reconfig; 6029 uint8_t peer_supports_nrsack; 6030 uint8_t peer_supports_pktdrop; 6031 uint8_t peer_supports_idata; 6032 #ifdef INET 6033 struct sockaddr_in sin; 6034 #endif 6035 #ifdef INET6 6036 struct sockaddr_in6 sin6; 6037 #endif 6038 6039 /* First get the destination address setup too. */ 6040 #ifdef INET 6041 memset(&sin, 0, sizeof(sin)); 6042 sin.sin_family = AF_INET; 6043 sin.sin_len = sizeof(sin); 6044 sin.sin_port = stcb->rport; 6045 #endif 6046 #ifdef INET6 6047 memset(&sin6, 0, sizeof(sin6)); 6048 sin6.sin6_family = AF_INET6; 6049 sin6.sin6_len = sizeof(struct sockaddr_in6); 6050 sin6.sin6_port = stcb->rport; 6051 #endif 6052 if (altsa) { 6053 sa = altsa; 6054 } else { 6055 sa = src; 6056 } 6057 peer_supports_idata = 0; 6058 peer_supports_ecn = 0; 6059 peer_supports_prsctp = 0; 6060 peer_supports_auth = 0; 6061 peer_supports_asconf = 0; 6062 peer_supports_asconf_ack = 0; 6063 peer_supports_reconfig = 0; 6064 peer_supports_nrsack = 0; 6065 peer_supports_pktdrop = 0; 6066 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6067 /* mark all addresses that we have currently on the list */ 6068 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6069 } 6070 /* does the source address already exist? if so skip it */ 6071 inp = stcb->sctp_ep; 6072 atomic_add_int(&stcb->asoc.refcnt, 1); 6073 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6074 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6075 6076 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6077 /* we must add the source address */ 6078 /* no scope set here since we have a tcb already. */ 6079 switch (sa->sa_family) { 6080 #ifdef INET 6081 case AF_INET: 6082 if (stcb->asoc.scope.ipv4_addr_legal) { 6083 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6084 return (-1); 6085 } 6086 } 6087 break; 6088 #endif 6089 #ifdef INET6 6090 case AF_INET6: 6091 if (stcb->asoc.scope.ipv6_addr_legal) { 6092 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6093 return (-2); 6094 } 6095 } 6096 break; 6097 #endif 6098 default: 6099 break; 6100 } 6101 } else { 6102 if (net_tmp != NULL && stcb_tmp == stcb) { 6103 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6104 } else if (stcb_tmp != stcb) { 6105 /* It belongs to another association? */ 6106 if (stcb_tmp) 6107 SCTP_TCB_UNLOCK(stcb_tmp); 6108 return (-3); 6109 } 6110 } 6111 if (stcb->asoc.state == 0) { 6112 /* the assoc was freed? */ 6113 return (-4); 6114 } 6115 /* now we must go through each of the params. */ 6116 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6117 while (phdr) { 6118 ptype = ntohs(phdr->param_type); 6119 plen = ntohs(phdr->param_length); 6120 /* 6121 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6122 * (uint32_t)ptype, (int)plen); 6123 */ 6124 if (offset + plen > limit) { 6125 break; 6126 } 6127 if (plen < sizeof(struct sctp_paramhdr)) { 6128 break; 6129 } 6130 #ifdef INET 6131 if (ptype == SCTP_IPV4_ADDRESS) { 6132 if (stcb->asoc.scope.ipv4_addr_legal) { 6133 struct sctp_ipv4addr_param *p4, p4_buf; 6134 6135 /* ok get the v4 address and check/add */ 6136 phdr = sctp_get_next_param(m, offset, 6137 (struct sctp_paramhdr *)&p4_buf, 6138 sizeof(p4_buf)); 6139 if (plen != sizeof(struct sctp_ipv4addr_param) || 6140 phdr == NULL) { 6141 return (-5); 6142 } 6143 p4 = (struct sctp_ipv4addr_param *)phdr; 6144 sin.sin_addr.s_addr = p4->addr; 6145 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6146 /* Skip multi-cast addresses */ 6147 goto next_param; 6148 } 6149 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6150 (sin.sin_addr.s_addr == INADDR_ANY)) { 6151 goto next_param; 6152 } 6153 sa = (struct sockaddr *)&sin; 6154 inp = stcb->sctp_ep; 6155 atomic_add_int(&stcb->asoc.refcnt, 1); 6156 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6157 dst, stcb); 6158 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6159 6160 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6161 inp == NULL) { 6162 /* we must add the source address */ 6163 /* 6164 * no scope set since we have a tcb 6165 * already 6166 */ 6167 6168 /* 6169 * we must validate the state again 6170 * here 6171 */ 6172 add_it_now: 6173 if (stcb->asoc.state == 0) { 6174 /* the assoc was freed? */ 6175 return (-7); 6176 } 6177 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6178 return (-8); 6179 } 6180 } else if (stcb_tmp == stcb) { 6181 if (stcb->asoc.state == 0) { 6182 /* the assoc was freed? */ 6183 return (-10); 6184 } 6185 if (net != NULL) { 6186 /* clear flag */ 6187 net->dest_state &= 6188 ~SCTP_ADDR_NOT_IN_ASSOC; 6189 } 6190 } else { 6191 /* 6192 * strange, address is in another 6193 * assoc? straighten out locks. 6194 */ 6195 if (stcb_tmp) { 6196 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6197 struct mbuf *op_err; 6198 char msg[SCTP_DIAG_INFO_LEN]; 6199 6200 /* 6201 * in setup state we 6202 * abort this guy 6203 */ 6204 SCTP_SNPRINTF(msg, sizeof(msg), 6205 "%s:%d at %s", __FILE__, __LINE__, __func__); 6206 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6207 msg); 6208 sctp_abort_an_association(stcb_tmp->sctp_ep, 6209 stcb_tmp, op_err, false, 6210 SCTP_SO_NOT_LOCKED); 6211 goto add_it_now; 6212 } 6213 SCTP_TCB_UNLOCK(stcb_tmp); 6214 } 6215 6216 if (stcb->asoc.state == 0) { 6217 /* the assoc was freed? */ 6218 return (-12); 6219 } 6220 return (-13); 6221 } 6222 } 6223 } else 6224 #endif 6225 #ifdef INET6 6226 if (ptype == SCTP_IPV6_ADDRESS) { 6227 if (stcb->asoc.scope.ipv6_addr_legal) { 6228 /* ok get the v6 address and check/add */ 6229 struct sctp_ipv6addr_param *p6, p6_buf; 6230 6231 phdr = sctp_get_next_param(m, offset, 6232 (struct sctp_paramhdr *)&p6_buf, 6233 sizeof(p6_buf)); 6234 if (plen != sizeof(struct sctp_ipv6addr_param) || 6235 phdr == NULL) { 6236 return (-14); 6237 } 6238 p6 = (struct sctp_ipv6addr_param *)phdr; 6239 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6240 sizeof(p6->addr)); 6241 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6242 /* Skip multi-cast addresses */ 6243 goto next_param; 6244 } 6245 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6246 /* 6247 * Link local make no sense without 6248 * scope 6249 */ 6250 goto next_param; 6251 } 6252 sa = (struct sockaddr *)&sin6; 6253 inp = stcb->sctp_ep; 6254 atomic_add_int(&stcb->asoc.refcnt, 1); 6255 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6256 dst, stcb); 6257 atomic_subtract_int(&stcb->asoc.refcnt, 1); 6258 if (stcb_tmp == NULL && 6259 (inp == stcb->sctp_ep || inp == NULL)) { 6260 /* 6261 * we must validate the state again 6262 * here 6263 */ 6264 add_it_now6: 6265 if (stcb->asoc.state == 0) { 6266 /* the assoc was freed? */ 6267 return (-16); 6268 } 6269 /* 6270 * we must add the address, no scope 6271 * set 6272 */ 6273 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6274 return (-17); 6275 } 6276 } else if (stcb_tmp == stcb) { 6277 /* 6278 * we must validate the state again 6279 * here 6280 */ 6281 if (stcb->asoc.state == 0) { 6282 /* the assoc was freed? */ 6283 return (-19); 6284 } 6285 if (net != NULL) { 6286 /* clear flag */ 6287 net->dest_state &= 6288 ~SCTP_ADDR_NOT_IN_ASSOC; 6289 } 6290 } else { 6291 /* 6292 * strange, address is in another 6293 * assoc? straighten out locks. 6294 */ 6295 if (stcb_tmp) { 6296 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6297 struct mbuf *op_err; 6298 char msg[SCTP_DIAG_INFO_LEN]; 6299 6300 /* 6301 * in setup state we 6302 * abort this guy 6303 */ 6304 SCTP_SNPRINTF(msg, sizeof(msg), 6305 "%s:%d at %s", __FILE__, __LINE__, __func__); 6306 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6307 msg); 6308 sctp_abort_an_association(stcb_tmp->sctp_ep, 6309 stcb_tmp, op_err, false, 6310 SCTP_SO_NOT_LOCKED); 6311 goto add_it_now6; 6312 } 6313 SCTP_TCB_UNLOCK(stcb_tmp); 6314 } 6315 if (stcb->asoc.state == 0) { 6316 /* the assoc was freed? */ 6317 return (-21); 6318 } 6319 return (-22); 6320 } 6321 } 6322 } else 6323 #endif 6324 if (ptype == SCTP_ECN_CAPABLE) { 6325 peer_supports_ecn = 1; 6326 } else if (ptype == SCTP_ULP_ADAPTATION) { 6327 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6328 struct sctp_adaptation_layer_indication ai, 6329 *aip; 6330 6331 phdr = sctp_get_next_param(m, offset, 6332 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6333 aip = (struct sctp_adaptation_layer_indication *)phdr; 6334 if (aip) { 6335 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6336 stcb->asoc.adaptation_needed = 1; 6337 } 6338 } 6339 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6340 struct sctp_asconf_addr_param lstore, *fee; 6341 int lptype; 6342 struct sockaddr *lsa = NULL; 6343 #ifdef INET 6344 struct sctp_asconf_addrv4_param *fii; 6345 #endif 6346 6347 if (stcb->asoc.asconf_supported == 0) { 6348 return (-100); 6349 } 6350 if (plen > sizeof(lstore)) { 6351 return (-23); 6352 } 6353 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6354 return (-101); 6355 } 6356 phdr = sctp_get_next_param(m, offset, 6357 (struct sctp_paramhdr *)&lstore, 6358 plen); 6359 if (phdr == NULL) { 6360 return (-24); 6361 } 6362 fee = (struct sctp_asconf_addr_param *)phdr; 6363 lptype = ntohs(fee->addrp.ph.param_type); 6364 switch (lptype) { 6365 #ifdef INET 6366 case SCTP_IPV4_ADDRESS: 6367 if (plen != 6368 sizeof(struct sctp_asconf_addrv4_param)) { 6369 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6370 (int)sizeof(struct sctp_asconf_addrv4_param), 6371 plen); 6372 } else { 6373 fii = (struct sctp_asconf_addrv4_param *)fee; 6374 sin.sin_addr.s_addr = fii->addrp.addr; 6375 lsa = (struct sockaddr *)&sin; 6376 } 6377 break; 6378 #endif 6379 #ifdef INET6 6380 case SCTP_IPV6_ADDRESS: 6381 if (plen != 6382 sizeof(struct sctp_asconf_addr_param)) { 6383 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6384 (int)sizeof(struct sctp_asconf_addr_param), 6385 plen); 6386 } else { 6387 memcpy(sin6.sin6_addr.s6_addr, 6388 fee->addrp.addr, 6389 sizeof(fee->addrp.addr)); 6390 lsa = (struct sockaddr *)&sin6; 6391 } 6392 break; 6393 #endif 6394 default: 6395 break; 6396 } 6397 if (lsa) { 6398 (void)sctp_set_primary_addr(stcb, sa, NULL); 6399 } 6400 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6401 stcb->asoc.peer_supports_nat = 1; 6402 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6403 /* Peer supports pr-sctp */ 6404 peer_supports_prsctp = 1; 6405 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6406 /* A supported extension chunk */ 6407 struct sctp_supported_chunk_types_param *pr_supported; 6408 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6409 int num_ent, i; 6410 6411 if (plen > sizeof(local_store)) { 6412 return (-35); 6413 } 6414 phdr = sctp_get_next_param(m, offset, 6415 (struct sctp_paramhdr *)&local_store, plen); 6416 if (phdr == NULL) { 6417 return (-25); 6418 } 6419 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6420 num_ent = plen - sizeof(struct sctp_paramhdr); 6421 for (i = 0; i < num_ent; i++) { 6422 switch (pr_supported->chunk_types[i]) { 6423 case SCTP_ASCONF: 6424 peer_supports_asconf = 1; 6425 break; 6426 case SCTP_ASCONF_ACK: 6427 peer_supports_asconf_ack = 1; 6428 break; 6429 case SCTP_FORWARD_CUM_TSN: 6430 peer_supports_prsctp = 1; 6431 break; 6432 case SCTP_PACKET_DROPPED: 6433 peer_supports_pktdrop = 1; 6434 break; 6435 case SCTP_NR_SELECTIVE_ACK: 6436 peer_supports_nrsack = 1; 6437 break; 6438 case SCTP_STREAM_RESET: 6439 peer_supports_reconfig = 1; 6440 break; 6441 case SCTP_AUTHENTICATION: 6442 peer_supports_auth = 1; 6443 break; 6444 case SCTP_IDATA: 6445 peer_supports_idata = 1; 6446 break; 6447 default: 6448 /* one I have not learned yet */ 6449 break; 6450 } 6451 } 6452 } else if (ptype == SCTP_RANDOM) { 6453 if (plen > sizeof(random_store)) 6454 break; 6455 if (got_random) { 6456 /* already processed a RANDOM */ 6457 goto next_param; 6458 } 6459 phdr = sctp_get_next_param(m, offset, 6460 (struct sctp_paramhdr *)random_store, 6461 plen); 6462 if (phdr == NULL) 6463 return (-26); 6464 p_random = (struct sctp_auth_random *)phdr; 6465 random_len = plen - sizeof(*p_random); 6466 /* enforce the random length */ 6467 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6468 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6469 return (-27); 6470 } 6471 got_random = 1; 6472 } else if (ptype == SCTP_HMAC_LIST) { 6473 uint16_t num_hmacs; 6474 uint16_t i; 6475 6476 if (plen > sizeof(hmacs_store)) 6477 break; 6478 if (got_hmacs) { 6479 /* already processed a HMAC list */ 6480 goto next_param; 6481 } 6482 phdr = sctp_get_next_param(m, offset, 6483 (struct sctp_paramhdr *)hmacs_store, 6484 plen); 6485 if (phdr == NULL) 6486 return (-28); 6487 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6488 hmacs_len = plen - sizeof(*hmacs); 6489 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6490 /* validate the hmac list */ 6491 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6492 return (-29); 6493 } 6494 if (stcb->asoc.peer_hmacs != NULL) 6495 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6496 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6497 if (stcb->asoc.peer_hmacs != NULL) { 6498 for (i = 0; i < num_hmacs; i++) { 6499 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6500 ntohs(hmacs->hmac_ids[i])); 6501 } 6502 } 6503 got_hmacs = 1; 6504 } else if (ptype == SCTP_CHUNK_LIST) { 6505 int i; 6506 6507 if (plen > sizeof(chunks_store)) 6508 break; 6509 if (got_chklist) { 6510 /* already processed a Chunks list */ 6511 goto next_param; 6512 } 6513 phdr = sctp_get_next_param(m, offset, 6514 (struct sctp_paramhdr *)chunks_store, 6515 plen); 6516 if (phdr == NULL) 6517 return (-30); 6518 chunks = (struct sctp_auth_chunk_list *)phdr; 6519 num_chunks = plen - sizeof(*chunks); 6520 if (stcb->asoc.peer_auth_chunks != NULL) 6521 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6522 else 6523 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6524 for (i = 0; i < num_chunks; i++) { 6525 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6526 stcb->asoc.peer_auth_chunks); 6527 /* record asconf/asconf-ack if listed */ 6528 if (chunks->chunk_types[i] == SCTP_ASCONF) 6529 saw_asconf = 1; 6530 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6531 saw_asconf_ack = 1; 6532 } 6533 got_chklist = 1; 6534 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6535 (ptype == SCTP_STATE_COOKIE) || 6536 (ptype == SCTP_UNRECOG_PARAM) || 6537 (ptype == SCTP_COOKIE_PRESERVE) || 6538 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6539 (ptype == SCTP_ADD_IP_ADDRESS) || 6540 (ptype == SCTP_DEL_IP_ADDRESS) || 6541 (ptype == SCTP_ERROR_CAUSE_IND) || 6542 (ptype == SCTP_SUCCESS_REPORT)) { 6543 /* don't care */ 6544 } else { 6545 if ((ptype & 0x8000) == 0x0000) { 6546 /* 6547 * must stop processing the rest of the 6548 * param's. Any report bits were handled 6549 * with the call to 6550 * sctp_arethere_unrecognized_parameters() 6551 * when the INIT or INIT-ACK was first seen. 6552 */ 6553 break; 6554 } 6555 } 6556 6557 next_param: 6558 offset += SCTP_SIZE32(plen); 6559 if (offset >= limit) { 6560 break; 6561 } 6562 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6563 sizeof(param_buf)); 6564 } 6565 /* Now check to see if we need to purge any addresses */ 6566 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6567 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6568 SCTP_ADDR_NOT_IN_ASSOC) { 6569 /* This address has been removed from the asoc */ 6570 /* remove and free it */ 6571 stcb->asoc.numnets--; 6572 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6573 if (net == stcb->asoc.alternate) { 6574 sctp_free_remote_addr(stcb->asoc.alternate); 6575 stcb->asoc.alternate = NULL; 6576 } 6577 if (net == stcb->asoc.primary_destination) { 6578 stcb->asoc.primary_destination = NULL; 6579 sctp_select_primary_destination(stcb); 6580 } 6581 sctp_free_remote_addr(net); 6582 } 6583 } 6584 if ((stcb->asoc.ecn_supported == 1) && 6585 (peer_supports_ecn == 0)) { 6586 stcb->asoc.ecn_supported = 0; 6587 } 6588 if ((stcb->asoc.prsctp_supported == 1) && 6589 (peer_supports_prsctp == 0)) { 6590 stcb->asoc.prsctp_supported = 0; 6591 } 6592 if ((stcb->asoc.auth_supported == 1) && 6593 ((peer_supports_auth == 0) || 6594 (got_random == 0) || (got_hmacs == 0))) { 6595 stcb->asoc.auth_supported = 0; 6596 } 6597 if ((stcb->asoc.asconf_supported == 1) && 6598 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6599 (stcb->asoc.auth_supported == 0) || 6600 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6601 stcb->asoc.asconf_supported = 0; 6602 } 6603 if ((stcb->asoc.reconfig_supported == 1) && 6604 (peer_supports_reconfig == 0)) { 6605 stcb->asoc.reconfig_supported = 0; 6606 } 6607 if ((stcb->asoc.idata_supported == 1) && 6608 (peer_supports_idata == 0)) { 6609 stcb->asoc.idata_supported = 0; 6610 } 6611 if ((stcb->asoc.nrsack_supported == 1) && 6612 (peer_supports_nrsack == 0)) { 6613 stcb->asoc.nrsack_supported = 0; 6614 } 6615 if ((stcb->asoc.pktdrop_supported == 1) && 6616 (peer_supports_pktdrop == 0)) { 6617 stcb->asoc.pktdrop_supported = 0; 6618 } 6619 /* validate authentication required parameters */ 6620 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6621 /* peer does not support auth but sent a chunks list? */ 6622 return (-31); 6623 } 6624 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6625 /* peer supports asconf but not auth? */ 6626 return (-32); 6627 } else if ((peer_supports_asconf == 1) && 6628 (peer_supports_auth == 1) && 6629 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6630 return (-33); 6631 } 6632 /* concatenate the full random key */ 6633 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6634 if (chunks != NULL) { 6635 keylen += sizeof(*chunks) + num_chunks; 6636 } 6637 new_key = sctp_alloc_key(keylen); 6638 if (new_key != NULL) { 6639 /* copy in the RANDOM */ 6640 if (p_random != NULL) { 6641 keylen = sizeof(*p_random) + random_len; 6642 memcpy(new_key->key, p_random, keylen); 6643 } else { 6644 keylen = 0; 6645 } 6646 /* append in the AUTH chunks */ 6647 if (chunks != NULL) { 6648 memcpy(new_key->key + keylen, chunks, 6649 sizeof(*chunks) + num_chunks); 6650 keylen += sizeof(*chunks) + num_chunks; 6651 } 6652 /* append in the HMACs */ 6653 if (hmacs != NULL) { 6654 memcpy(new_key->key + keylen, hmacs, 6655 sizeof(*hmacs) + hmacs_len); 6656 } 6657 } else { 6658 /* failed to get memory for the key */ 6659 return (-34); 6660 } 6661 if (stcb->asoc.authinfo.peer_random != NULL) 6662 sctp_free_key(stcb->asoc.authinfo.peer_random); 6663 stcb->asoc.authinfo.peer_random = new_key; 6664 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6665 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6666 6667 return (0); 6668 } 6669 6670 int 6671 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6672 struct sctp_nets *net) 6673 { 6674 /* make sure the requested primary address exists in the assoc */ 6675 if (net == NULL && sa) 6676 net = sctp_findnet(stcb, sa); 6677 6678 if (net == NULL) { 6679 /* didn't find the requested primary address! */ 6680 return (-1); 6681 } else { 6682 /* set the primary address */ 6683 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6684 /* Must be confirmed, so queue to set */ 6685 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6686 return (0); 6687 } 6688 stcb->asoc.primary_destination = net; 6689 if (((net->dest_state & SCTP_ADDR_PF) == 0) && 6690 (stcb->asoc.alternate != NULL)) { 6691 sctp_free_remote_addr(stcb->asoc.alternate); 6692 stcb->asoc.alternate = NULL; 6693 } 6694 net = TAILQ_FIRST(&stcb->asoc.nets); 6695 if (net != stcb->asoc.primary_destination) { 6696 /* 6697 * first one on the list is NOT the primary 6698 * sctp_cmpaddr() is much more efficient if the 6699 * primary is the first on the list, make it so. 6700 */ 6701 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6702 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6703 } 6704 return (0); 6705 } 6706 } 6707 6708 bool 6709 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6710 { 6711 struct sctpasochead *head; 6712 struct sctp_tcb *stcb; 6713 6714 SCTP_INP_INFO_LOCK_ASSERT(); 6715 6716 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, SCTP_BASE_INFO(hashasocmark))]; 6717 LIST_FOREACH(stcb, head, sctp_asocs) { 6718 /* 6719 * We choose not to lock anything here. TCB's can't be 6720 * removed since we have the read lock, so they can't be 6721 * freed on us, same thing for the INP. I may be wrong with 6722 * this assumption, but we will go with it for now :-) 6723 */ 6724 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6725 continue; 6726 } 6727 if (stcb->asoc.my_vtag == tag) { 6728 /* candidate */ 6729 if (stcb->rport != rport) { 6730 continue; 6731 } 6732 if (stcb->sctp_ep->sctp_lport != lport) { 6733 continue; 6734 } 6735 /* The tag is currently used, so don't use it. */ 6736 return (false); 6737 } 6738 } 6739 return (!sctp_is_in_timewait(tag, lport, rport, (uint32_t)now->tv_sec)); 6740 } 6741 6742 static void 6743 sctp_drain_mbufs(struct sctp_tcb *stcb) 6744 { 6745 /* 6746 * We must hunt this association for MBUF's past the cumack (i.e. 6747 * out of order data that we can renege on). 6748 */ 6749 struct sctp_association *asoc; 6750 struct sctp_tmit_chunk *chk, *nchk; 6751 uint32_t cumulative_tsn_p1; 6752 struct sctp_queued_to_read *control, *ncontrol; 6753 int cnt, strmat; 6754 uint32_t gap, i; 6755 int fnd = 0; 6756 6757 /* We look for anything larger than the cum-ack + 1 */ 6758 6759 asoc = &stcb->asoc; 6760 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6761 /* none we can reneg on. */ 6762 return; 6763 } 6764 SCTP_STAT_INCR(sctps_protocol_drains_done); 6765 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6766 cnt = 0; 6767 /* Ok that was fun, now we will drain all the inbound streams? */ 6768 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6769 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6770 #ifdef INVARIANTS 6771 if (control->on_strm_q != SCTP_ON_ORDERED) { 6772 panic("Huh control: %p on_q: %d -- not ordered?", 6773 control, control->on_strm_q); 6774 } 6775 #endif 6776 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6777 /* Yep it is above cum-ack */ 6778 cnt++; 6779 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6780 KASSERT(control->length > 0, ("control has zero length")); 6781 if (asoc->size_on_all_streams >= control->length) { 6782 asoc->size_on_all_streams -= control->length; 6783 } else { 6784 #ifdef INVARIANTS 6785 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6786 #else 6787 asoc->size_on_all_streams = 0; 6788 #endif 6789 } 6790 sctp_ucount_decr(asoc->cnt_on_all_streams); 6791 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6792 if (control->on_read_q) { 6793 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6794 control->on_read_q = 0; 6795 } 6796 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6797 control->on_strm_q = 0; 6798 if (control->data) { 6799 sctp_m_freem(control->data); 6800 control->data = NULL; 6801 } 6802 sctp_free_remote_addr(control->whoFrom); 6803 /* Now its reasm? */ 6804 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6805 cnt++; 6806 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6807 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6808 if (asoc->size_on_reasm_queue >= chk->send_size) { 6809 asoc->size_on_reasm_queue -= chk->send_size; 6810 } else { 6811 #ifdef INVARIANTS 6812 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6813 #else 6814 asoc->size_on_reasm_queue = 0; 6815 #endif 6816 } 6817 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6818 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6819 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6820 if (chk->data) { 6821 sctp_m_freem(chk->data); 6822 chk->data = NULL; 6823 } 6824 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6825 } 6826 sctp_free_a_readq(stcb, control); 6827 } 6828 } 6829 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6830 #ifdef INVARIANTS 6831 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6832 panic("Huh control: %p on_q: %d -- not unordered?", 6833 control, control->on_strm_q); 6834 } 6835 #endif 6836 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6837 /* Yep it is above cum-ack */ 6838 cnt++; 6839 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6840 KASSERT(control->length > 0, ("control has zero length")); 6841 if (asoc->size_on_all_streams >= control->length) { 6842 asoc->size_on_all_streams -= control->length; 6843 } else { 6844 #ifdef INVARIANTS 6845 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6846 #else 6847 asoc->size_on_all_streams = 0; 6848 #endif 6849 } 6850 sctp_ucount_decr(asoc->cnt_on_all_streams); 6851 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6852 if (control->on_read_q) { 6853 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6854 control->on_read_q = 0; 6855 } 6856 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6857 control->on_strm_q = 0; 6858 if (control->data) { 6859 sctp_m_freem(control->data); 6860 control->data = NULL; 6861 } 6862 sctp_free_remote_addr(control->whoFrom); 6863 /* Now its reasm? */ 6864 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6865 cnt++; 6866 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6867 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6868 if (asoc->size_on_reasm_queue >= chk->send_size) { 6869 asoc->size_on_reasm_queue -= chk->send_size; 6870 } else { 6871 #ifdef INVARIANTS 6872 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6873 #else 6874 asoc->size_on_reasm_queue = 0; 6875 #endif 6876 } 6877 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6878 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6879 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6880 if (chk->data) { 6881 sctp_m_freem(chk->data); 6882 chk->data = NULL; 6883 } 6884 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6885 } 6886 sctp_free_a_readq(stcb, control); 6887 } 6888 } 6889 } 6890 if (cnt) { 6891 /* We must back down to see what the new highest is */ 6892 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6893 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6894 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6895 asoc->highest_tsn_inside_map = i; 6896 fnd = 1; 6897 break; 6898 } 6899 } 6900 if (!fnd) { 6901 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6902 } 6903 6904 /* 6905 * Question, should we go through the delivery queue? The 6906 * only reason things are on here is the app not reading OR 6907 * a p-d-api up. An attacker COULD send enough in to 6908 * initiate the PD-API and then send a bunch of stuff to 6909 * other streams... these would wind up on the delivery 6910 * queue.. and then we would not get to them. But in order 6911 * to do this I then have to back-track and un-deliver 6912 * sequence numbers in streams.. el-yucko. I think for now 6913 * we will NOT look at the delivery queue and leave it to be 6914 * something to consider later. An alternative would be to 6915 * abort the P-D-API with a notification and then deliver 6916 * the data.... Or another method might be to keep track of 6917 * how many times the situation occurs and if we see a 6918 * possible attack underway just abort the association. 6919 */ 6920 #ifdef SCTP_DEBUG 6921 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6922 #endif 6923 /* 6924 * Now do we need to find a new 6925 * asoc->highest_tsn_inside_map? 6926 */ 6927 asoc->last_revoke_count = cnt; 6928 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6929 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6930 /* sa_ignore NO_NULL_CHK */ 6931 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6932 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6933 } 6934 /* 6935 * Another issue, in un-setting the TSN's in the mapping array we 6936 * DID NOT adjust the highest_tsn marker. This will cause one of 6937 * two things to occur. It may cause us to do extra work in checking 6938 * for our mapping array movement. More importantly it may cause us 6939 * to SACK every datagram. This may not be a bad thing though since 6940 * we will recover once we get our cum-ack above and all this stuff 6941 * we dumped recovered. 6942 */ 6943 } 6944 6945 static void 6946 sctp_drain(void) 6947 { 6948 struct epoch_tracker et; 6949 6950 VNET_ITERATOR_DECL(vnet_iter); 6951 6952 NET_EPOCH_ENTER(et); 6953 /* 6954 * We must walk the PCB lists for ALL associations here. The system 6955 * is LOW on MBUF's and needs help. This is where reneging will 6956 * occur. We really hope this does NOT happen! 6957 */ 6958 VNET_LIST_RLOCK_NOSLEEP(); 6959 VNET_FOREACH(vnet_iter) { 6960 CURVNET_SET(vnet_iter); 6961 struct sctp_inpcb *inp; 6962 struct sctp_tcb *stcb; 6963 6964 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6965 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6966 #ifdef VIMAGE 6967 continue; 6968 #else 6969 NET_EPOCH_EXIT(et); 6970 return; 6971 #endif 6972 } 6973 SCTP_INP_INFO_RLOCK(); 6974 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6975 /* For each endpoint */ 6976 SCTP_INP_RLOCK(inp); 6977 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6978 /* For each association */ 6979 SCTP_TCB_LOCK(stcb); 6980 sctp_drain_mbufs(stcb); 6981 SCTP_TCB_UNLOCK(stcb); 6982 } 6983 SCTP_INP_RUNLOCK(inp); 6984 } 6985 SCTP_INP_INFO_RUNLOCK(); 6986 CURVNET_RESTORE(); 6987 } 6988 VNET_LIST_RUNLOCK_NOSLEEP(); 6989 NET_EPOCH_EXIT(et); 6990 } 6991 6992 EVENTHANDLER_DEFINE(vm_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT); 6993 EVENTHANDLER_DEFINE(mbuf_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT); 6994 6995 /* 6996 * start a new iterator 6997 * iterates through all endpoints and associations based on the pcb_state 6998 * flags and asoc_state. "af" (mandatory) is executed for all matching 6999 * assocs and "ef" (optional) is executed when the iterator completes. 7000 * "inpf" (optional) is executed for each new endpoint as it is being 7001 * iterated through. inpe (optional) is called when the inp completes 7002 * its way through all the stcbs. 7003 */ 7004 int 7005 sctp_initiate_iterator(inp_func inpf, 7006 asoc_func af, 7007 inp_func inpe, 7008 uint32_t pcb_state, 7009 uint32_t pcb_features, 7010 uint32_t asoc_state, 7011 void *argp, 7012 uint32_t argi, 7013 end_func ef, 7014 struct sctp_inpcb *s_inp, 7015 uint8_t chunk_output_off) 7016 { 7017 struct sctp_iterator *it = NULL; 7018 7019 if (af == NULL) { 7020 return (-1); 7021 } 7022 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7023 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7024 SCTP_BASE_VAR(sctp_pcb_initialized)); 7025 return (-1); 7026 } 7027 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7028 SCTP_M_ITER); 7029 if (it == NULL) { 7030 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7031 return (-1); 7032 } 7033 memset(it, 0, sizeof(*it)); 7034 it->function_assoc = af; 7035 it->function_inp = inpf; 7036 if (inpf) 7037 it->done_current_ep = 0; 7038 else 7039 it->done_current_ep = 1; 7040 it->function_atend = ef; 7041 it->pointer = argp; 7042 it->val = argi; 7043 it->pcb_flags = pcb_state; 7044 it->pcb_features = pcb_features; 7045 it->asoc_state = asoc_state; 7046 it->function_inp_end = inpe; 7047 it->no_chunk_output = chunk_output_off; 7048 it->vn = curvnet; 7049 if (s_inp) { 7050 /* Assume lock is held here */ 7051 it->inp = s_inp; 7052 SCTP_INP_INCR_REF(it->inp); 7053 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7054 } else { 7055 SCTP_INP_INFO_RLOCK(); 7056 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7057 if (it->inp) { 7058 SCTP_INP_INCR_REF(it->inp); 7059 } 7060 SCTP_INP_INFO_RUNLOCK(); 7061 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7062 } 7063 SCTP_IPI_ITERATOR_WQ_LOCK(); 7064 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7065 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7066 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7067 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7068 SCTP_FREE(it, SCTP_M_ITER); 7069 return (-1); 7070 } 7071 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7072 if (sctp_it_ctl.iterator_running == 0) { 7073 sctp_wakeup_iterator(); 7074 } 7075 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7076 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7077 return (0); 7078 } 7079 7080 /* 7081 * Atomically add flags to the sctp_flags of an inp. 7082 * To be used when the write lock of the inp is not held. 7083 */ 7084 void 7085 sctp_pcb_add_flags(struct sctp_inpcb *inp, uint32_t flags) 7086 { 7087 uint32_t old_flags, new_flags; 7088 7089 do { 7090 old_flags = inp->sctp_flags; 7091 new_flags = old_flags | flags; 7092 } while (atomic_cmpset_int(&inp->sctp_flags, old_flags, new_flags) == 0); 7093 }
Cache object: cb294f500a6ad6f531fbcc0fff237660
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