sctp_pcb.c revision 270359
1/*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: stable/10/sys/netinet/sctp_pcb.c 270359 2014-08-22 20:05:09Z tuexen $"); 35 36#include <netinet/sctp_os.h> 37#include <sys/proc.h> 38#include <netinet/sctp_var.h> 39#include <netinet/sctp_sysctl.h> 40#include <netinet/sctp_pcb.h> 41#include <netinet/sctputil.h> 42#include <netinet/sctp.h> 43#include <netinet/sctp_header.h> 44#include <netinet/sctp_asconf.h> 45#include <netinet/sctp_output.h> 46#include <netinet/sctp_timer.h> 47#include <netinet/sctp_bsd_addr.h> 48#include <netinet/sctp_dtrace_define.h> 49#if defined(INET) || defined(INET6) 50#include <netinet/udp.h> 51#endif 52#ifdef INET6 53#include <netinet6/ip6_var.h> 54#endif 55#include <sys/sched.h> 56#include <sys/smp.h> 57#include <sys/unistd.h> 58 59 60VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62/* FIX: we don't handle multiple link local scopes */ 63/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64#ifdef INET6 65int 66SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67{ 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return (0); 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79} 80 81#endif 82 83void 84sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85{ 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100} 101 102/*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147struct sctp_vrf * 148sctp_allocate_vrf(int vrf_id) 149{ 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163#ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165#endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181#ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183#endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192} 193 194 195struct sctp_ifn * 196sctp_find_ifn(void *ifn, uint32_t ifn_index) 197{ 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215} 216 217 218struct sctp_vrf * 219sctp_find_vrf(uint32_t vrf_id) 220{ 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231} 232 233 234void 235sctp_free_vrf(struct sctp_vrf *vrf) 236{ 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247} 248 249 250void 251sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252{ 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261} 262 263 264void 265sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266{ 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273} 274 275 276void 277sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278{ 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287} 288 289 290static void 291sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292{ 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310} 311 312 313void 314sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316{ 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354} 355 356 357void 358sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360{ 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398} 399 400 401/*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406static void 407sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408{ 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418#ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422#endif 423#ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427#endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 434 sctp_ifnp->registered_af = ifa_af; 435 } 436} 437 438 439/*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445static void 446sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447{ 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453#ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457#endif 458#ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462#endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488} 489 490 491struct sctp_ifa * 492sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496{ 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505#ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508#endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532#ifdef INVARIANTS 533 panic("No memory for IFN"); 534#endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608#ifdef INVARIANTS 609 panic("No memory for IFA"); 610#endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623#ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641#endif 642#ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661#endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 bzero(wi, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 SCTP_WQ_ADDR_UNLOCK(); 714 715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 716 (struct sctp_inpcb *)NULL, 717 (struct sctp_tcb *)NULL, 718 (struct sctp_nets *)NULL); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724} 725 726void 727sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729{ 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739#ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742#endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789#ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795#endif 796 797out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 bzero(wi, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 SCTP_WQ_ADDR_UNLOCK(); 826 827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 828 (struct sctp_inpcb *)NULL, 829 (struct sctp_tcb *)NULL, 830 (struct sctp_nets *)NULL); 831 } 832 return; 833} 834 835 836static int 837sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838{ 839 int loopback_scope; 840 841#if defined(INET) 842 int ipv4_local_scope, ipv4_addr_legal; 843 844#endif 845#if defined(INET6) 846 int local_scope, site_scope, ipv6_addr_legal; 847 848#endif 849 struct sctp_vrf *vrf; 850 struct sctp_ifn *sctp_ifn; 851 struct sctp_ifa *sctp_ifa; 852 853 loopback_scope = stcb->asoc.scope.loopback_scope; 854#if defined(INET) 855 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 856 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 857#endif 858#if defined(INET6) 859 local_scope = stcb->asoc.scope.local_scope; 860 site_scope = stcb->asoc.scope.site_scope; 861 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 862#endif 863 864 SCTP_IPI_ADDR_RLOCK(); 865 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 866 if (vrf == NULL) { 867 /* no vrf, no addresses */ 868 SCTP_IPI_ADDR_RUNLOCK(); 869 return (0); 870 } 871 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 872 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 873 if ((loopback_scope == 0) && 874 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 875 continue; 876 } 877 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 878 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 879 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 880 /* 881 * We allow pending addresses, where 882 * we have sent an asconf-add to be 883 * considered valid. 884 */ 885 continue; 886 } 887 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 888 continue; 889 } 890 switch (sctp_ifa->address.sa.sa_family) { 891#ifdef INET 892 case AF_INET: 893 if (ipv4_addr_legal) { 894 struct sockaddr_in *sin, 895 *rsin; 896 897 sin = &sctp_ifa->address.sin; 898 rsin = (struct sockaddr_in *)to; 899 if ((ipv4_local_scope == 0) && 900 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 901 continue; 902 } 903 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 904 &sin->sin_addr) != 0) { 905 continue; 906 } 907 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 908 SCTP_IPI_ADDR_RUNLOCK(); 909 return (1); 910 } 911 } 912 break; 913#endif 914#ifdef INET6 915 case AF_INET6: 916 if (ipv6_addr_legal) { 917 struct sockaddr_in6 *sin6, 918 *rsin6; 919 920 sin6 = &sctp_ifa->address.sin6; 921 rsin6 = (struct sockaddr_in6 *)to; 922 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 923 &sin6->sin6_addr) != 0) { 924 continue; 925 } 926 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 927 if (local_scope == 0) 928 continue; 929 if (sin6->sin6_scope_id == 0) { 930 if (sa6_recoverscope(sin6) != 0) 931 continue; 932 } 933 } 934 if ((site_scope == 0) && 935 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 936 continue; 937 } 938 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 939 SCTP_IPI_ADDR_RUNLOCK(); 940 return (1); 941 } 942 } 943 break; 944#endif 945 default: 946 /* TSNH */ 947 break; 948 } 949 } 950 } 951 } else { 952 struct sctp_laddr *laddr; 953 954 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 955 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 956 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 957 continue; 958 } 959 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 960 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 961 /* 962 * We allow pending addresses, where we have 963 * sent an asconf-add to be considered 964 * valid. 965 */ 966 continue; 967 } 968 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 969 continue; 970 } 971 switch (to->sa_family) { 972#ifdef INET 973 case AF_INET: 974 { 975 struct sockaddr_in *sin, *rsin; 976 977 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 978 rsin = (struct sockaddr_in *)to; 979 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 980 SCTP_IPI_ADDR_RUNLOCK(); 981 return (1); 982 } 983 break; 984 } 985#endif 986#ifdef INET6 987 case AF_INET6: 988 { 989 struct sockaddr_in6 *sin6, *rsin6; 990 991 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 992 rsin6 = (struct sockaddr_in6 *)to; 993 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (1); 996 } 997 break; 998 } 999 1000#endif 1001 default: 1002 /* TSNH */ 1003 break; 1004 } 1005 1006 } 1007 } 1008 SCTP_IPI_ADDR_RUNLOCK(); 1009 return (0); 1010} 1011 1012 1013static struct sctp_tcb * 1014sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1015 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1016{ 1017 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1018 /* 1019 * If we support the TCP model, then we must now dig through to see 1020 * if we can find our endpoint in the list of tcp ep's. 1021 */ 1022 uint16_t lport, rport; 1023 struct sctppcbhead *ephead; 1024 struct sctp_inpcb *inp; 1025 struct sctp_laddr *laddr; 1026 struct sctp_tcb *stcb; 1027 struct sctp_nets *net; 1028 1029 if ((to == NULL) || (from == NULL)) { 1030 return (NULL); 1031 } 1032 switch (to->sa_family) { 1033#ifdef INET 1034 case AF_INET: 1035 if (from->sa_family == AF_INET) { 1036 lport = ((struct sockaddr_in *)to)->sin_port; 1037 rport = ((struct sockaddr_in *)from)->sin_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042#endif 1043#ifdef INET6 1044 case AF_INET6: 1045 if (from->sa_family == AF_INET6) { 1046 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1047 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1048 } else { 1049 return (NULL); 1050 } 1051 break; 1052#endif 1053 default: 1054 return (NULL); 1055 } 1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1057 /* 1058 * Ok now for each of the guys in this bucket we must look and see: 1059 * - Does the remote port match. - Does there single association's 1060 * addresses match this address (to). If so we update p_ep to point 1061 * to this ep and return the tcb from it. 1062 */ 1063 LIST_FOREACH(inp, ephead, sctp_hash) { 1064 SCTP_INP_RLOCK(inp); 1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 if (lport != inp->sctp_lport) { 1070 SCTP_INP_RUNLOCK(inp); 1071 continue; 1072 } 1073 switch (to->sa_family) { 1074#ifdef INET 1075 case AF_INET: 1076 { 1077 struct sockaddr_in *sin; 1078 1079 sin = (struct sockaddr_in *)to; 1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1081 &sin->sin_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087#endif 1088#ifdef INET6 1089 case AF_INET6: 1090 { 1091 struct sockaddr_in6 *sin6; 1092 1093 sin6 = (struct sockaddr_in6 *)to; 1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1095 &sin6->sin6_addr) != 0) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 break; 1100 } 1101#endif 1102 default: 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 if (inp->def_vrf_id != vrf_id) { 1107 SCTP_INP_RUNLOCK(inp); 1108 continue; 1109 } 1110 /* check to see if the ep has one of the addresses */ 1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1112 /* We are NOT bound all, so look further */ 1113 int match = 0; 1114 1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1116 1117 if (laddr->ifa == NULL) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 1119 continue; 1120 } 1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1123 continue; 1124 } 1125 if (laddr->ifa->address.sa.sa_family == 1126 to->sa_family) { 1127 /* see if it matches */ 1128#ifdef INET 1129 if (from->sa_family == AF_INET) { 1130 struct sockaddr_in *intf_addr, 1131 *sin; 1132 1133 intf_addr = &laddr->ifa->address.sin; 1134 sin = (struct sockaddr_in *)to; 1135 if (sin->sin_addr.s_addr == 1136 intf_addr->sin_addr.s_addr) { 1137 match = 1; 1138 break; 1139 } 1140 } 1141#endif 1142#ifdef INET6 1143 if (from->sa_family == AF_INET6) { 1144 struct sockaddr_in6 *intf_addr6; 1145 struct sockaddr_in6 *sin6; 1146 1147 sin6 = (struct sockaddr_in6 *) 1148 to; 1149 intf_addr6 = &laddr->ifa->address.sin6; 1150 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1152 intf_addr6)) { 1153 match = 1; 1154 break; 1155 } 1156 } 1157#endif 1158 } 1159 } 1160 if (match == 0) { 1161 /* This endpoint does not have this address */ 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 } 1166 /* 1167 * Ok if we hit here the ep has the address, does it hold 1168 * the tcb? 1169 */ 1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1171 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1172 if (stcb == NULL) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 SCTP_TCB_LOCK(stcb); 1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->rport != rport) { 1183 /* remote port does not match. */ 1184 SCTP_TCB_UNLOCK(stcb); 1185 SCTP_INP_RUNLOCK(inp); 1186 continue; 1187 } 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 continue; 1197 } 1198 /* Does this TCB have a matching address? */ 1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200 1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1202 /* not the same family, can't be a match */ 1203 continue; 1204 } 1205 switch (from->sa_family) { 1206#ifdef INET 1207 case AF_INET: 1208 { 1209 struct sockaddr_in *sin, *rsin; 1210 1211 sin = (struct sockaddr_in *)&net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)from; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 /* 1220 * Update the endpoint 1221 * pointer 1222 */ 1223 *inp_p = inp; 1224 SCTP_INP_RUNLOCK(inp); 1225 return (stcb); 1226 } 1227 break; 1228 } 1229#endif 1230#ifdef INET6 1231 case AF_INET6: 1232 { 1233 struct sockaddr_in6 *sin6, *rsin6; 1234 1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1236 rsin6 = (struct sockaddr_in6 *)from; 1237 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1238 rsin6)) { 1239 /* found it */ 1240 if (netp != NULL) { 1241 *netp = net; 1242 } 1243 /* 1244 * Update the endpoint 1245 * pointer 1246 */ 1247 *inp_p = inp; 1248 SCTP_INP_RUNLOCK(inp); 1249 return (stcb); 1250 } 1251 break; 1252 } 1253#endif 1254 default: 1255 /* TSNH */ 1256 break; 1257 } 1258 } 1259 SCTP_TCB_UNLOCK(stcb); 1260 SCTP_INP_RUNLOCK(inp); 1261 } 1262 return (NULL); 1263} 1264 1265 1266/* 1267 * rules for use 1268 * 1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1272 * NULL. 1273 */ 1274 1275struct sctp_tcb * 1276sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1278{ 1279 struct sctpasochead *head; 1280 struct sctp_inpcb *inp; 1281 struct sctp_tcb *stcb = NULL; 1282 struct sctp_nets *net; 1283 uint16_t rport; 1284 1285 inp = *inp_p; 1286 switch (remote->sa_family) { 1287#ifdef INET 1288 case AF_INET: 1289 rport = (((struct sockaddr_in *)remote)->sin_port); 1290 break; 1291#endif 1292#ifdef INET6 1293 case AF_INET6: 1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1295 break; 1296#endif 1297 default: 1298 return (NULL); 1299 } 1300 if (locked_tcb) { 1301 /* 1302 * UN-lock so we can do proper locking here this occurs when 1303 * called from load_addresses_from_init. 1304 */ 1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1306 SCTP_TCB_UNLOCK(locked_tcb); 1307 } 1308 SCTP_INP_INFO_RLOCK(); 1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1311 /*- 1312 * Now either this guy is our listener or it's the 1313 * connector. If it is the one that issued the connect, then 1314 * it's only chance is to be the first TCB in the list. If 1315 * it is the acceptor, then do the special_lookup to hash 1316 * and find the real inp. 1317 */ 1318 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1319 /* to is peer addr, from is my addr */ 1320 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1321 netp, inp->def_vrf_id); 1322 if ((stcb != NULL) && (locked_tcb == NULL)) { 1323 /* we have a locked tcb, lower refcount */ 1324 SCTP_INP_DECR_REF(inp); 1325 } 1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1328 SCTP_TCB_LOCK(locked_tcb); 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1331 } 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } else { 1335 SCTP_INP_WLOCK(inp); 1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1337 goto null_return; 1338 } 1339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1340 if (stcb == NULL) { 1341 goto null_return; 1342 } 1343 SCTP_TCB_LOCK(stcb); 1344 1345 if (stcb->rport != rport) { 1346 /* remote port does not match. */ 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1355 SCTP_TCB_UNLOCK(stcb); 1356 goto null_return; 1357 } 1358 /* now look at the list of remote addresses */ 1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1360#ifdef INVARIANTS 1361 if (net == (TAILQ_NEXT(net, sctp_next))) { 1362 panic("Corrupt net list"); 1363 } 1364#endif 1365 if (net->ro._l_addr.sa.sa_family != 1366 remote->sa_family) { 1367 /* not the same family */ 1368 continue; 1369 } 1370 switch (remote->sa_family) { 1371#ifdef INET 1372 case AF_INET: 1373 { 1374 struct sockaddr_in *sin, 1375 *rsin; 1376 1377 sin = (struct sockaddr_in *) 1378 &net->ro._l_addr; 1379 rsin = (struct sockaddr_in *)remote; 1380 if (sin->sin_addr.s_addr == 1381 rsin->sin_addr.s_addr) { 1382 /* found it */ 1383 if (netp != NULL) { 1384 *netp = net; 1385 } 1386 if (locked_tcb == NULL) { 1387 SCTP_INP_DECR_REF(inp); 1388 } else if (locked_tcb != stcb) { 1389 SCTP_TCB_LOCK(locked_tcb); 1390 } 1391 if (locked_tcb) { 1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1393 } 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400#endif 1401#ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429#endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 if (head == NULL) { 1445 goto null_return; 1446 } 1447 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1448 if (stcb->rport != rport) { 1449 /* remote port does not match */ 1450 continue; 1451 } 1452 SCTP_TCB_LOCK(stcb); 1453 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1454 SCTP_TCB_UNLOCK(stcb); 1455 continue; 1456 } 1457 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1458 SCTP_TCB_UNLOCK(stcb); 1459 continue; 1460 } 1461 /* now look at the list of remote addresses */ 1462 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1463#ifdef INVARIANTS 1464 if (net == (TAILQ_NEXT(net, sctp_next))) { 1465 panic("Corrupt net list"); 1466 } 1467#endif 1468 if (net->ro._l_addr.sa.sa_family != 1469 remote->sa_family) { 1470 /* not the same family */ 1471 continue; 1472 } 1473 switch (remote->sa_family) { 1474#ifdef INET 1475 case AF_INET: 1476 { 1477 struct sockaddr_in *sin, 1478 *rsin; 1479 1480 sin = (struct sockaddr_in *) 1481 &net->ro._l_addr; 1482 rsin = (struct sockaddr_in *)remote; 1483 if (sin->sin_addr.s_addr == 1484 rsin->sin_addr.s_addr) { 1485 /* found it */ 1486 if (netp != NULL) { 1487 *netp = net; 1488 } 1489 if (locked_tcb == NULL) { 1490 SCTP_INP_DECR_REF(inp); 1491 } else if (locked_tcb != stcb) { 1492 SCTP_TCB_LOCK(locked_tcb); 1493 } 1494 if (locked_tcb) { 1495 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1496 } 1497 SCTP_INP_WUNLOCK(inp); 1498 SCTP_INP_INFO_RUNLOCK(); 1499 return (stcb); 1500 } 1501 break; 1502 } 1503#endif 1504#ifdef INET6 1505 case AF_INET6: 1506 { 1507 struct sockaddr_in6 *sin6, 1508 *rsin6; 1509 1510 sin6 = (struct sockaddr_in6 *) 1511 &net->ro._l_addr; 1512 rsin6 = (struct sockaddr_in6 *)remote; 1513 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1514 rsin6)) { 1515 /* found it */ 1516 if (netp != NULL) { 1517 *netp = net; 1518 } 1519 if (locked_tcb == NULL) { 1520 SCTP_INP_DECR_REF(inp); 1521 } else if (locked_tcb != stcb) { 1522 SCTP_TCB_LOCK(locked_tcb); 1523 } 1524 if (locked_tcb) { 1525 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1526 } 1527 SCTP_INP_WUNLOCK(inp); 1528 SCTP_INP_INFO_RUNLOCK(); 1529 return (stcb); 1530 } 1531 break; 1532 } 1533#endif 1534 default: 1535 /* TSNH */ 1536 break; 1537 } 1538 } 1539 SCTP_TCB_UNLOCK(stcb); 1540 } 1541 } 1542null_return: 1543 /* clean up for returning null */ 1544 if (locked_tcb) { 1545 SCTP_TCB_LOCK(locked_tcb); 1546 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1547 } 1548 SCTP_INP_WUNLOCK(inp); 1549 SCTP_INP_INFO_RUNLOCK(); 1550 /* not found */ 1551 return (NULL); 1552} 1553 1554 1555/* 1556 * Find an association for a specific endpoint using the association id given 1557 * out in the COMM_UP notification 1558 */ 1559struct sctp_tcb * 1560sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1561{ 1562 /* 1563 * Use my the assoc_id to find a endpoint 1564 */ 1565 struct sctpasochead *head; 1566 struct sctp_tcb *stcb; 1567 uint32_t id; 1568 1569 if (inp == NULL) { 1570 SCTP_PRINTF("TSNH ep_associd\n"); 1571 return (NULL); 1572 } 1573 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1574 SCTP_PRINTF("TSNH ep_associd0\n"); 1575 return (NULL); 1576 } 1577 id = (uint32_t) asoc_id; 1578 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1579 if (head == NULL) { 1580 /* invalid id TSNH */ 1581 SCTP_PRINTF("TSNH ep_associd1\n"); 1582 return (NULL); 1583 } 1584 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1585 if (stcb->asoc.assoc_id == id) { 1586 if (inp != stcb->sctp_ep) { 1587 /* 1588 * some other guy has the same id active (id 1589 * collision ??). 1590 */ 1591 SCTP_PRINTF("TSNH ep_associd2\n"); 1592 continue; 1593 } 1594 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1595 continue; 1596 } 1597 if (want_lock) { 1598 SCTP_TCB_LOCK(stcb); 1599 } 1600 return (stcb); 1601 } 1602 } 1603 return (NULL); 1604} 1605 1606 1607struct sctp_tcb * 1608sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1609{ 1610 struct sctp_tcb *stcb; 1611 1612 SCTP_INP_RLOCK(inp); 1613 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1614 SCTP_INP_RUNLOCK(inp); 1615 return (stcb); 1616} 1617 1618 1619/* 1620 * Endpoint probe expects that the INP_INFO is locked. 1621 */ 1622static struct sctp_inpcb * 1623sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1624 uint16_t lport, uint32_t vrf_id) 1625{ 1626 struct sctp_inpcb *inp; 1627 struct sctp_laddr *laddr; 1628 1629#ifdef INET 1630 struct sockaddr_in *sin; 1631 1632#endif 1633#ifdef INET6 1634 struct sockaddr_in6 *sin6; 1635 struct sockaddr_in6 *intf_addr6; 1636 1637#endif 1638 int fnd; 1639 1640#ifdef INET 1641 sin = NULL; 1642#endif 1643#ifdef INET6 1644 sin6 = NULL; 1645#endif 1646 switch (nam->sa_family) { 1647#ifdef INET 1648 case AF_INET: 1649 sin = (struct sockaddr_in *)nam; 1650 break; 1651#endif 1652#ifdef INET6 1653 case AF_INET6: 1654 sin6 = (struct sockaddr_in6 *)nam; 1655 break; 1656#endif 1657 default: 1658 /* unsupported family */ 1659 return (NULL); 1660 } 1661 1662 if (head == NULL) 1663 return (NULL); 1664 1665 LIST_FOREACH(inp, head, sctp_hash) { 1666 SCTP_INP_RLOCK(inp); 1667 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1668 SCTP_INP_RUNLOCK(inp); 1669 continue; 1670 } 1671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1672 (inp->sctp_lport == lport)) { 1673 /* got it */ 1674 switch (nam->sa_family) { 1675#ifdef INET 1676 case AF_INET: 1677 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1678 SCTP_IPV6_V6ONLY(inp)) { 1679 /* 1680 * IPv4 on a IPv6 socket with ONLY 1681 * IPv6 set 1682 */ 1683 SCTP_INP_RUNLOCK(inp); 1684 continue; 1685 } 1686 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1687 &sin->sin_addr) != 0) { 1688 SCTP_INP_RUNLOCK(inp); 1689 continue; 1690 } 1691 break; 1692#endif 1693#ifdef INET6 1694 case AF_INET6: 1695 /* 1696 * A V6 address and the endpoint is NOT 1697 * bound V6 1698 */ 1699 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1700 SCTP_INP_RUNLOCK(inp); 1701 continue; 1702 } 1703 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1704 &sin6->sin6_addr) != 0) { 1705 SCTP_INP_RUNLOCK(inp); 1706 continue; 1707 } 1708 break; 1709#endif 1710 default: 1711 break; 1712 } 1713 /* does a VRF id match? */ 1714 fnd = 0; 1715 if (inp->def_vrf_id == vrf_id) 1716 fnd = 1; 1717 1718 SCTP_INP_RUNLOCK(inp); 1719 if (!fnd) 1720 continue; 1721 return (inp); 1722 } 1723 SCTP_INP_RUNLOCK(inp); 1724 } 1725 switch (nam->sa_family) { 1726#ifdef INET 1727 case AF_INET: 1728 if (sin->sin_addr.s_addr == INADDR_ANY) { 1729 /* Can't hunt for one that has no address specified */ 1730 return (NULL); 1731 } 1732 break; 1733#endif 1734#ifdef INET6 1735 case AF_INET6: 1736 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1737 /* Can't hunt for one that has no address specified */ 1738 return (NULL); 1739 } 1740 break; 1741#endif 1742 default: 1743 break; 1744 } 1745 /* 1746 * ok, not bound to all so see if we can find a EP bound to this 1747 * address. 1748 */ 1749 LIST_FOREACH(inp, head, sctp_hash) { 1750 SCTP_INP_RLOCK(inp); 1751 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1752 SCTP_INP_RUNLOCK(inp); 1753 continue; 1754 } 1755 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1756 SCTP_INP_RUNLOCK(inp); 1757 continue; 1758 } 1759 /* 1760 * Ok this could be a likely candidate, look at all of its 1761 * addresses 1762 */ 1763 if (inp->sctp_lport != lport) { 1764 SCTP_INP_RUNLOCK(inp); 1765 continue; 1766 } 1767 /* does a VRF id match? */ 1768 fnd = 0; 1769 if (inp->def_vrf_id == vrf_id) 1770 fnd = 1; 1771 1772 if (!fnd) { 1773 SCTP_INP_RUNLOCK(inp); 1774 continue; 1775 } 1776 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1777 if (laddr->ifa == NULL) { 1778 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1779 __FUNCTION__); 1780 continue; 1781 } 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1783 (void *)laddr->ifa); 1784 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1785 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1786 continue; 1787 } 1788 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1789 /* possible, see if it matches */ 1790 switch (nam->sa_family) { 1791#ifdef INET 1792 case AF_INET: 1793 if (sin->sin_addr.s_addr == 1794 laddr->ifa->address.sin.sin_addr.s_addr) { 1795 SCTP_INP_RUNLOCK(inp); 1796 return (inp); 1797 } 1798 break; 1799#endif 1800#ifdef INET6 1801 case AF_INET6: 1802 intf_addr6 = &laddr->ifa->address.sin6; 1803 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1804 intf_addr6)) { 1805 SCTP_INP_RUNLOCK(inp); 1806 return (inp); 1807 } 1808 break; 1809#endif 1810 } 1811 } 1812 } 1813 SCTP_INP_RUNLOCK(inp); 1814 } 1815 return (NULL); 1816} 1817 1818 1819static struct sctp_inpcb * 1820sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1821{ 1822 struct sctppcbhead *head; 1823 struct sctp_inpcb *t_inp; 1824 int fnd; 1825 1826 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1827 SCTP_BASE_INFO(hashmark))]; 1828 LIST_FOREACH(t_inp, head, sctp_hash) { 1829 if (t_inp->sctp_lport != lport) { 1830 continue; 1831 } 1832 /* is it in the VRF in question */ 1833 fnd = 0; 1834 if (t_inp->def_vrf_id == vrf_id) 1835 fnd = 1; 1836 if (!fnd) 1837 continue; 1838 1839 /* This one is in use. */ 1840 /* check the v6/v4 binding issue */ 1841 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1842 SCTP_IPV6_V6ONLY(t_inp)) { 1843 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1844 /* collision in V6 space */ 1845 return (t_inp); 1846 } else { 1847 /* inp is BOUND_V4 no conflict */ 1848 continue; 1849 } 1850 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1851 /* t_inp is bound v4 and v6, conflict always */ 1852 return (t_inp); 1853 } else { 1854 /* t_inp is bound only V4 */ 1855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1856 SCTP_IPV6_V6ONLY(inp)) { 1857 /* no conflict */ 1858 continue; 1859 } 1860 /* else fall through to conflict */ 1861 } 1862 return (t_inp); 1863 } 1864 return (NULL); 1865} 1866 1867 1868int 1869sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1870{ 1871 /* For 1-2-1 with port reuse */ 1872 struct sctppcbhead *head; 1873 struct sctp_inpcb *tinp; 1874 1875 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1876 /* only works with port reuse on */ 1877 return (-1); 1878 } 1879 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1880 return (0); 1881 } 1882 SCTP_INP_RUNLOCK(inp); 1883 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1884 SCTP_BASE_INFO(hashmark))]; 1885 /* Kick out all non-listeners to the TCP hash */ 1886 LIST_FOREACH(tinp, head, sctp_hash) { 1887 if (tinp->sctp_lport != inp->sctp_lport) { 1888 continue; 1889 } 1890 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1891 continue; 1892 } 1893 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1894 continue; 1895 } 1896 if (tinp->sctp_socket->so_qlimit) { 1897 continue; 1898 } 1899 SCTP_INP_WLOCK(tinp); 1900 LIST_REMOVE(tinp, sctp_hash); 1901 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1902 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1903 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1904 SCTP_INP_WUNLOCK(tinp); 1905 } 1906 SCTP_INP_WLOCK(inp); 1907 /* Pull from where he was */ 1908 LIST_REMOVE(inp, sctp_hash); 1909 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1910 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1911 LIST_INSERT_HEAD(head, inp, sctp_hash); 1912 SCTP_INP_WUNLOCK(inp); 1913 SCTP_INP_RLOCK(inp); 1914 return (0); 1915} 1916 1917 1918struct sctp_inpcb * 1919sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1920 uint32_t vrf_id) 1921{ 1922 /* 1923 * First we check the hash table to see if someone has this port 1924 * bound with just the port. 1925 */ 1926 struct sctp_inpcb *inp; 1927 struct sctppcbhead *head; 1928 int lport; 1929 unsigned int i; 1930 1931#ifdef INET 1932 struct sockaddr_in *sin; 1933 1934#endif 1935#ifdef INET6 1936 struct sockaddr_in6 *sin6; 1937 1938#endif 1939 1940 switch (nam->sa_family) { 1941#ifdef INET 1942 case AF_INET: 1943 sin = (struct sockaddr_in *)nam; 1944 lport = sin->sin_port; 1945 break; 1946#endif 1947#ifdef INET6 1948 case AF_INET6: 1949 sin6 = (struct sockaddr_in6 *)nam; 1950 lport = sin6->sin6_port; 1951 break; 1952#endif 1953 default: 1954 return (NULL); 1955 } 1956 /* 1957 * I could cheat here and just cast to one of the types but we will 1958 * do it right. It also provides the check against an Unsupported 1959 * type too. 1960 */ 1961 /* Find the head of the ALLADDR chain */ 1962 if (have_lock == 0) { 1963 SCTP_INP_INFO_RLOCK(); 1964 } 1965 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1966 SCTP_BASE_INFO(hashmark))]; 1967 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1968 1969 /* 1970 * If the TCP model exists it could be that the main listening 1971 * endpoint is gone but there still exists a connected socket for 1972 * this guy. If so we can return the first one that we find. This 1973 * may NOT be the correct one so the caller should be wary on the 1974 * returned INP. Currently the only caller that sets find_tcp_pool 1975 * is in bindx where we are verifying that a user CAN bind the 1976 * address. He either has bound it already, or someone else has, or 1977 * its open to bind, so this is good enough. 1978 */ 1979 if (inp == NULL && find_tcp_pool) { 1980 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1981 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1982 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1983 if (inp) { 1984 break; 1985 } 1986 } 1987 } 1988 if (inp) { 1989 SCTP_INP_INCR_REF(inp); 1990 } 1991 if (have_lock == 0) { 1992 SCTP_INP_INFO_RUNLOCK(); 1993 } 1994 return (inp); 1995} 1996 1997 1998/* 1999 * Find an association for an endpoint with the pointer to whom you want to 2000 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2001 * need to change the *to to some other struct like a mbuf... 2002 */ 2003struct sctp_tcb * 2004sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2005 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2006 uint32_t vrf_id) 2007{ 2008 struct sctp_inpcb *inp = NULL; 2009 struct sctp_tcb *stcb; 2010 2011 SCTP_INP_INFO_RLOCK(); 2012 if (find_tcp_pool) { 2013 if (inp_p != NULL) { 2014 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2015 vrf_id); 2016 } else { 2017 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2018 vrf_id); 2019 } 2020 if (stcb != NULL) { 2021 SCTP_INP_INFO_RUNLOCK(); 2022 return (stcb); 2023 } 2024 } 2025 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2026 if (inp_p != NULL) { 2027 *inp_p = inp; 2028 } 2029 SCTP_INP_INFO_RUNLOCK(); 2030 if (inp == NULL) { 2031 return (NULL); 2032 } 2033 /* 2034 * ok, we have an endpoint, now lets find the assoc for it (if any) 2035 * we now place the source address or from in the to of the find 2036 * endpoint call. Since in reality this chain is used from the 2037 * inbound packet side. 2038 */ 2039 if (inp_p != NULL) { 2040 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2041 NULL); 2042 } else { 2043 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2044 NULL); 2045 } 2046 return (stcb); 2047} 2048 2049 2050/* 2051 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2052 * find all addresses that the sender has specified in any address list. Each 2053 * address will be used to lookup the TCB and see if one exits. 2054 */ 2055static struct sctp_tcb * 2056sctp_findassociation_special_addr(struct mbuf *m, int offset, 2057 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2058 struct sockaddr *dst) 2059{ 2060 struct sctp_paramhdr *phdr, parm_buf; 2061 2062#if defined(INET) || defined(INET6) 2063 struct sctp_tcb *stcb; 2064 uint16_t ptype; 2065 2066#endif 2067 uint16_t plen; 2068 2069#ifdef INET 2070 struct sockaddr_in sin4; 2071 2072#endif 2073#ifdef INET6 2074 struct sockaddr_in6 sin6; 2075 2076#endif 2077 2078#ifdef INET 2079 memset(&sin4, 0, sizeof(sin4)); 2080 sin4.sin_len = sizeof(sin4); 2081 sin4.sin_family = AF_INET; 2082 sin4.sin_port = sh->src_port; 2083#endif 2084#ifdef INET6 2085 memset(&sin6, 0, sizeof(sin6)); 2086 sin6.sin6_len = sizeof(sin6); 2087 sin6.sin6_family = AF_INET6; 2088 sin6.sin6_port = sh->src_port; 2089#endif 2090 2091 offset += sizeof(struct sctp_init_chunk); 2092 2093 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2094 while (phdr != NULL) { 2095 /* now we must see if we want the parameter */ 2096#if defined(INET) || defined(INET6) 2097 ptype = ntohs(phdr->param_type); 2098#endif 2099 plen = ntohs(phdr->param_length); 2100 if (plen == 0) { 2101 break; 2102 } 2103#ifdef INET 2104 if (ptype == SCTP_IPV4_ADDRESS && 2105 plen == sizeof(struct sctp_ipv4addr_param)) { 2106 /* Get the rest of the address */ 2107 struct sctp_ipv4addr_param ip4_parm, *p4; 2108 2109 phdr = sctp_get_next_param(m, offset, 2110 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2111 if (phdr == NULL) { 2112 return (NULL); 2113 } 2114 p4 = (struct sctp_ipv4addr_param *)phdr; 2115 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2116 /* look it up */ 2117 stcb = sctp_findassociation_ep_addr(inp_p, 2118 (struct sockaddr *)&sin4, netp, dst, NULL); 2119 if (stcb != NULL) { 2120 return (stcb); 2121 } 2122 } 2123#endif 2124#ifdef INET6 2125 if (ptype == SCTP_IPV6_ADDRESS && 2126 plen == sizeof(struct sctp_ipv6addr_param)) { 2127 /* Get the rest of the address */ 2128 struct sctp_ipv6addr_param ip6_parm, *p6; 2129 2130 phdr = sctp_get_next_param(m, offset, 2131 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2132 if (phdr == NULL) { 2133 return (NULL); 2134 } 2135 p6 = (struct sctp_ipv6addr_param *)phdr; 2136 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2137 /* look it up */ 2138 stcb = sctp_findassociation_ep_addr(inp_p, 2139 (struct sockaddr *)&sin6, netp, dst, NULL); 2140 if (stcb != NULL) { 2141 return (stcb); 2142 } 2143 } 2144#endif 2145 offset += SCTP_SIZE32(plen); 2146 phdr = sctp_get_next_param(m, offset, &parm_buf, 2147 sizeof(parm_buf)); 2148 } 2149 return (NULL); 2150} 2151 2152static struct sctp_tcb * 2153sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2154 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2155 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2156{ 2157 /* 2158 * Use my vtag to hash. If we find it we then verify the source addr 2159 * is in the assoc. If all goes well we save a bit on rec of a 2160 * packet. 2161 */ 2162 struct sctpasochead *head; 2163 struct sctp_nets *net; 2164 struct sctp_tcb *stcb; 2165 2166 SCTP_INP_INFO_RLOCK(); 2167 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2168 SCTP_BASE_INFO(hashasocmark))]; 2169 if (head == NULL) { 2170 /* invalid vtag */ 2171 SCTP_INP_INFO_RUNLOCK(); 2172 return (NULL); 2173 } 2174 LIST_FOREACH(stcb, head, sctp_asocs) { 2175 SCTP_INP_RLOCK(stcb->sctp_ep); 2176 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2177 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2178 continue; 2179 } 2180 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2181 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2182 continue; 2183 } 2184 SCTP_TCB_LOCK(stcb); 2185 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2186 if (stcb->asoc.my_vtag == vtag) { 2187 /* candidate */ 2188 if (stcb->rport != rport) { 2189 SCTP_TCB_UNLOCK(stcb); 2190 continue; 2191 } 2192 if (stcb->sctp_ep->sctp_lport != lport) { 2193 SCTP_TCB_UNLOCK(stcb); 2194 continue; 2195 } 2196 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 /* RRS:Need toaddr check here */ 2201 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2202 /* Endpoint does not own this address */ 2203 SCTP_TCB_UNLOCK(stcb); 2204 continue; 2205 } 2206 if (remote_tag) { 2207 /* 2208 * If we have both vtags that's all we match 2209 * on 2210 */ 2211 if (stcb->asoc.peer_vtag == remote_tag) { 2212 /* 2213 * If both tags match we consider it 2214 * conclusive and check NO 2215 * source/destination addresses 2216 */ 2217 goto conclusive; 2218 } 2219 } 2220 if (skip_src_check) { 2221 conclusive: 2222 if (from) { 2223 *netp = sctp_findnet(stcb, from); 2224 } else { 2225 *netp = NULL; /* unknown */ 2226 } 2227 if (inp_p) 2228 *inp_p = stcb->sctp_ep; 2229 SCTP_INP_INFO_RUNLOCK(); 2230 return (stcb); 2231 } 2232 net = sctp_findnet(stcb, from); 2233 if (net) { 2234 /* yep its him. */ 2235 *netp = net; 2236 SCTP_STAT_INCR(sctps_vtagexpress); 2237 *inp_p = stcb->sctp_ep; 2238 SCTP_INP_INFO_RUNLOCK(); 2239 return (stcb); 2240 } else { 2241 /* 2242 * not him, this should only happen in rare 2243 * cases so I peg it. 2244 */ 2245 SCTP_STAT_INCR(sctps_vtagbogus); 2246 } 2247 } 2248 SCTP_TCB_UNLOCK(stcb); 2249 } 2250 SCTP_INP_INFO_RUNLOCK(); 2251 return (NULL); 2252} 2253 2254 2255/* 2256 * Find an association with the pointer to the inbound IP packet. This can be 2257 * a IPv4 or IPv6 packet. 2258 */ 2259struct sctp_tcb * 2260sctp_findassociation_addr(struct mbuf *m, int offset, 2261 struct sockaddr *src, struct sockaddr *dst, 2262 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2263 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2264{ 2265 int find_tcp_pool; 2266 struct sctp_tcb *stcb; 2267 struct sctp_inpcb *inp; 2268 2269 if (sh->v_tag) { 2270 /* we only go down this path if vtag is non-zero */ 2271 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2272 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2273 if (stcb) { 2274 return (stcb); 2275 } 2276 } 2277 find_tcp_pool = 0; 2278 if ((ch->chunk_type != SCTP_INITIATION) && 2279 (ch->chunk_type != SCTP_INITIATION_ACK) && 2280 (ch->chunk_type != SCTP_COOKIE_ACK) && 2281 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2282 /* Other chunk types go to the tcp pool. */ 2283 find_tcp_pool = 1; 2284 } 2285 if (inp_p) { 2286 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2287 find_tcp_pool, vrf_id); 2288 inp = *inp_p; 2289 } else { 2290 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2291 find_tcp_pool, vrf_id); 2292 } 2293 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2294 if (stcb == NULL && inp) { 2295 /* Found a EP but not this address */ 2296 if ((ch->chunk_type == SCTP_INITIATION) || 2297 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2298 /*- 2299 * special hook, we do NOT return linp or an 2300 * association that is linked to an existing 2301 * association that is under the TCP pool (i.e. no 2302 * listener exists). The endpoint finding routine 2303 * will always find a listener before examining the 2304 * TCP pool. 2305 */ 2306 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2307 if (inp_p) { 2308 *inp_p = NULL; 2309 } 2310 return (NULL); 2311 } 2312 stcb = sctp_findassociation_special_addr(m, 2313 offset, sh, &inp, netp, dst); 2314 if (inp_p != NULL) { 2315 *inp_p = inp; 2316 } 2317 } 2318 } 2319 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2320 return (stcb); 2321} 2322 2323/* 2324 * lookup an association by an ASCONF lookup address. 2325 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2326 */ 2327struct sctp_tcb * 2328sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2329 struct sockaddr *dst, struct sctphdr *sh, 2330 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2331{ 2332 struct sctp_tcb *stcb; 2333 struct sockaddr_storage remote_store; 2334 struct sctp_paramhdr parm_buf, *phdr; 2335 int ptype; 2336 int zero_address = 0; 2337 2338#ifdef INET 2339 struct sockaddr_in *sin; 2340 2341#endif 2342#ifdef INET6 2343 struct sockaddr_in6 *sin6; 2344 2345#endif 2346 2347 memset(&remote_store, 0, sizeof(remote_store)); 2348 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2349 &parm_buf, sizeof(struct sctp_paramhdr)); 2350 if (phdr == NULL) { 2351 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2352 __FUNCTION__); 2353 return NULL; 2354 } 2355 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2356 /* get the correlation address */ 2357 switch (ptype) { 2358#ifdef INET6 2359 case SCTP_IPV6_ADDRESS: 2360 { 2361 /* ipv6 address param */ 2362 struct sctp_ipv6addr_param *p6, p6_buf; 2363 2364 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2365 return NULL; 2366 } 2367 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2368 offset + sizeof(struct sctp_asconf_chunk), 2369 &p6_buf.ph, sizeof(*p6)); 2370 if (p6 == NULL) { 2371 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2372 __FUNCTION__); 2373 return (NULL); 2374 } 2375 sin6 = (struct sockaddr_in6 *)&remote_store; 2376 sin6->sin6_family = AF_INET6; 2377 sin6->sin6_len = sizeof(*sin6); 2378 sin6->sin6_port = sh->src_port; 2379 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2380 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2381 zero_address = 1; 2382 break; 2383 } 2384#endif 2385#ifdef INET 2386 case SCTP_IPV4_ADDRESS: 2387 { 2388 /* ipv4 address param */ 2389 struct sctp_ipv4addr_param *p4, p4_buf; 2390 2391 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2392 return NULL; 2393 } 2394 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2395 offset + sizeof(struct sctp_asconf_chunk), 2396 &p4_buf.ph, sizeof(*p4)); 2397 if (p4 == NULL) { 2398 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2399 __FUNCTION__); 2400 return (NULL); 2401 } 2402 sin = (struct sockaddr_in *)&remote_store; 2403 sin->sin_family = AF_INET; 2404 sin->sin_len = sizeof(*sin); 2405 sin->sin_port = sh->src_port; 2406 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2407 if (sin->sin_addr.s_addr == INADDR_ANY) 2408 zero_address = 1; 2409 break; 2410 } 2411#endif 2412 default: 2413 /* invalid address param type */ 2414 return NULL; 2415 } 2416 2417 if (zero_address) { 2418 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2419 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2420 if (stcb != NULL) { 2421 SCTP_INP_DECR_REF(*inp_p); 2422 } 2423 } else { 2424 stcb = sctp_findassociation_ep_addr(inp_p, 2425 (struct sockaddr *)&remote_store, netp, 2426 dst, NULL); 2427 } 2428 return (stcb); 2429} 2430 2431 2432/* 2433 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2434 * addresses. This way if we don't get a bind we by default pick a ephemeral 2435 * port with all addresses bound. 2436 */ 2437int 2438sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2439{ 2440 /* 2441 * we get called when a new endpoint starts up. We need to allocate 2442 * the sctp_inpcb structure from the zone and init it. Mark it as 2443 * unbound and find a port that we can use as an ephemeral with 2444 * INADDR_ANY. If the user binds later no problem we can then add in 2445 * the specific addresses. And setup the default parameters for the 2446 * EP. 2447 */ 2448 int i, error; 2449 struct sctp_inpcb *inp; 2450 struct sctp_pcb *m; 2451 struct timeval time; 2452 sctp_sharedkey_t *null_key; 2453 2454 error = 0; 2455 2456 SCTP_INP_INFO_WLOCK(); 2457 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2458 if (inp == NULL) { 2459 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2460 SCTP_INP_INFO_WUNLOCK(); 2461 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2462 return (ENOBUFS); 2463 } 2464 /* zap it */ 2465 bzero(inp, sizeof(*inp)); 2466 2467 /* bump generations */ 2468 /* setup socket pointers */ 2469 inp->sctp_socket = so; 2470 inp->ip_inp.inp.inp_socket = so; 2471 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2472#ifdef INET6 2473 if (INP_SOCKAF(so) == AF_INET6) { 2474 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2475 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2476 } 2477 if (MODULE_GLOBAL(ip6_v6only)) { 2478 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2479 } 2480 } 2481#endif 2482 inp->sctp_associd_counter = 1; 2483 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2484 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2485 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2486 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2487 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2488 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2489 /* init the small hash table we use to track asocid <-> tcb */ 2490 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2491 if (inp->sctp_asocidhash == NULL) { 2492 crfree(inp->ip_inp.inp.inp_cred); 2493 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2494 SCTP_INP_INFO_WUNLOCK(); 2495 return (ENOBUFS); 2496 } 2497#ifdef IPSEC 2498 { 2499 struct inpcbpolicy *pcb_sp = NULL; 2500 2501 error = ipsec_init_policy(so, &pcb_sp); 2502 /* Arrange to share the policy */ 2503 inp->ip_inp.inp.inp_sp = pcb_sp; 2504 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2505 } 2506 if (error != 0) { 2507 crfree(inp->ip_inp.inp.inp_cred); 2508 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2509 SCTP_INP_INFO_WUNLOCK(); 2510 return error; 2511 } 2512#endif /* IPSEC */ 2513 SCTP_INCR_EP_COUNT(); 2514 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2515 SCTP_INP_INFO_WUNLOCK(); 2516 2517 so->so_pcb = (caddr_t)inp; 2518 2519 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2520 /* UDP style socket */ 2521 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2522 SCTP_PCB_FLAGS_UNBOUND); 2523 /* Be sure it is NON-BLOCKING IO for UDP */ 2524 /* SCTP_SET_SO_NBIO(so); */ 2525 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2526 /* TCP style socket */ 2527 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2528 SCTP_PCB_FLAGS_UNBOUND); 2529 /* Be sure we have blocking IO by default */ 2530 SCTP_CLEAR_SO_NBIO(so); 2531 } else { 2532 /* 2533 * unsupported socket type (RAW, etc)- in case we missed it 2534 * in protosw 2535 */ 2536 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2537 so->so_pcb = NULL; 2538 crfree(inp->ip_inp.inp.inp_cred); 2539 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2540 return (EOPNOTSUPP); 2541 } 2542 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2543 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2544 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2545 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2546 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2547 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2548 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2549 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2550 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2551 } 2552 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2553 &inp->sctp_hashmark); 2554 if (inp->sctp_tcbhash == NULL) { 2555 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2556 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2557 so->so_pcb = NULL; 2558 crfree(inp->ip_inp.inp.inp_cred); 2559 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2560 return (ENOBUFS); 2561 } 2562 inp->def_vrf_id = vrf_id; 2563 2564 SCTP_INP_INFO_WLOCK(); 2565 SCTP_INP_LOCK_INIT(inp); 2566 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2567 SCTP_INP_READ_INIT(inp); 2568 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2569 /* lock the new ep */ 2570 SCTP_INP_WLOCK(inp); 2571 2572 /* add it to the info area */ 2573 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2574 SCTP_INP_INFO_WUNLOCK(); 2575 2576 TAILQ_INIT(&inp->read_queue); 2577 LIST_INIT(&inp->sctp_addr_list); 2578 2579 LIST_INIT(&inp->sctp_asoc_list); 2580 2581#ifdef SCTP_TRACK_FREED_ASOCS 2582 /* TEMP CODE */ 2583 LIST_INIT(&inp->sctp_asoc_free_list); 2584#endif 2585 /* Init the timer structure for signature change */ 2586 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2587 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2588 2589 /* now init the actual endpoint default data */ 2590 m = &inp->sctp_ep; 2591 2592 /* setup the base timeout information */ 2593 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2594 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2595 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2596 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2597 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2598 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2599 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2600 /* all max/min max are in ms */ 2601 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2602 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2603 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2604 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2605 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2606 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2607 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2608 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2609 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2610 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2611 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2612 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2613 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2614 2615 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2616 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2617 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2618 /* number of streams to pre-open on a association */ 2619 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2620 2621 /* Add adaptation cookie */ 2622 m->adaptation_layer_indicator = 0; 2623 m->adaptation_layer_indicator_provided = 0; 2624 2625 /* seed random number generator */ 2626 m->random_counter = 1; 2627 m->store_at = SCTP_SIGNATURE_SIZE; 2628 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2629 sctp_fill_random_store(m); 2630 2631 /* Minimum cookie size */ 2632 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2633 sizeof(struct sctp_state_cookie); 2634 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2635 2636 /* Setup the initial secret */ 2637 (void)SCTP_GETTIME_TIMEVAL(&time); 2638 m->time_of_secret_change = time.tv_sec; 2639 2640 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2641 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2642 } 2643 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2644 2645 /* How long is a cookie good for ? */ 2646 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2647 /* 2648 * Initialize authentication parameters 2649 */ 2650 m->local_hmacs = sctp_default_supported_hmaclist(); 2651 m->local_auth_chunks = sctp_alloc_chunklist(); 2652 m->default_dscp = 0; 2653#ifdef INET6 2654 m->default_flowlabel = 0; 2655#endif 2656 m->port = 0; /* encapsulation disabled by default */ 2657 sctp_auth_set_default_chunks(m->local_auth_chunks); 2658 LIST_INIT(&m->shared_keys); 2659 /* add default NULL key as key id 0 */ 2660 null_key = sctp_alloc_sharedkey(); 2661 sctp_insert_sharedkey(&m->shared_keys, null_key); 2662 SCTP_INP_WUNLOCK(inp); 2663#ifdef SCTP_LOG_CLOSING 2664 sctp_log_closing(inp, NULL, 12); 2665#endif 2666 return (error); 2667} 2668 2669 2670void 2671sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2672 struct sctp_tcb *stcb) 2673{ 2674 struct sctp_nets *net; 2675 uint16_t lport, rport; 2676 struct sctppcbhead *head; 2677 struct sctp_laddr *laddr, *oladdr; 2678 2679 atomic_add_int(&stcb->asoc.refcnt, 1); 2680 SCTP_TCB_UNLOCK(stcb); 2681 SCTP_INP_INFO_WLOCK(); 2682 SCTP_INP_WLOCK(old_inp); 2683 SCTP_INP_WLOCK(new_inp); 2684 SCTP_TCB_LOCK(stcb); 2685 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2686 2687 new_inp->sctp_ep.time_of_secret_change = 2688 old_inp->sctp_ep.time_of_secret_change; 2689 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2690 sizeof(old_inp->sctp_ep.secret_key)); 2691 new_inp->sctp_ep.current_secret_number = 2692 old_inp->sctp_ep.current_secret_number; 2693 new_inp->sctp_ep.last_secret_number = 2694 old_inp->sctp_ep.last_secret_number; 2695 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2696 2697 /* make it so new data pours into the new socket */ 2698 stcb->sctp_socket = new_inp->sctp_socket; 2699 stcb->sctp_ep = new_inp; 2700 2701 /* Copy the port across */ 2702 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2703 rport = stcb->rport; 2704 /* Pull the tcb from the old association */ 2705 LIST_REMOVE(stcb, sctp_tcbhash); 2706 LIST_REMOVE(stcb, sctp_tcblist); 2707 if (stcb->asoc.in_asocid_hash) { 2708 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2709 } 2710 /* Now insert the new_inp into the TCP connected hash */ 2711 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2712 2713 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2714 /* Its safe to access */ 2715 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2716 2717 /* Now move the tcb into the endpoint list */ 2718 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2719 /* 2720 * Question, do we even need to worry about the ep-hash since we 2721 * only have one connection? Probably not :> so lets get rid of it 2722 * and not suck up any kernel memory in that. 2723 */ 2724 if (stcb->asoc.in_asocid_hash) { 2725 struct sctpasochead *lhd; 2726 2727 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2728 new_inp->hashasocidmark)]; 2729 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2730 } 2731 /* Ok. Let's restart timer. */ 2732 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2733 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2734 stcb, net); 2735 } 2736 2737 SCTP_INP_INFO_WUNLOCK(); 2738 if (new_inp->sctp_tcbhash != NULL) { 2739 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2740 new_inp->sctp_tcbhash = NULL; 2741 } 2742 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2743 /* Subset bound, so copy in the laddr list from the old_inp */ 2744 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2745 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2746 if (laddr == NULL) { 2747 /* 2748 * Gak, what can we do? This assoc is really 2749 * HOSED. We probably should send an abort 2750 * here. 2751 */ 2752 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2753 continue; 2754 } 2755 SCTP_INCR_LADDR_COUNT(); 2756 bzero(laddr, sizeof(*laddr)); 2757 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2758 laddr->ifa = oladdr->ifa; 2759 atomic_add_int(&laddr->ifa->refcount, 1); 2760 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2761 sctp_nxt_addr); 2762 new_inp->laddr_count++; 2763 if (oladdr == stcb->asoc.last_used_address) { 2764 stcb->asoc.last_used_address = laddr; 2765 } 2766 } 2767 } 2768 /* 2769 * Now any running timers need to be adjusted since we really don't 2770 * care if they are running or not just blast in the new_inp into 2771 * all of them. 2772 */ 2773 2774 stcb->asoc.dack_timer.ep = (void *)new_inp; 2775 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2776 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2777 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2778 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2779 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2780 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2781 /* now what about the nets? */ 2782 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2783 net->pmtu_timer.ep = (void *)new_inp; 2784 net->hb_timer.ep = (void *)new_inp; 2785 net->rxt_timer.ep = (void *)new_inp; 2786 } 2787 SCTP_INP_WUNLOCK(new_inp); 2788 SCTP_INP_WUNLOCK(old_inp); 2789} 2790 2791 2792 2793 2794/* sctp_ifap is used to bypass normal local address validation checks */ 2795int 2796sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2797 struct sctp_ifa *sctp_ifap, struct thread *p) 2798{ 2799 /* bind a ep to a socket address */ 2800 struct sctppcbhead *head; 2801 struct sctp_inpcb *inp, *inp_tmp; 2802 struct inpcb *ip_inp; 2803 int port_reuse_active = 0; 2804 int bindall; 2805 uint16_t lport; 2806 int error; 2807 uint32_t vrf_id; 2808 2809 lport = 0; 2810 bindall = 1; 2811 inp = (struct sctp_inpcb *)so->so_pcb; 2812 ip_inp = (struct inpcb *)so->so_pcb; 2813#ifdef SCTP_DEBUG 2814 if (addr) { 2815 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2816 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2817 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2818 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2819 } 2820#endif 2821 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2822 /* already did a bind, subsequent binds NOT allowed ! */ 2823 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2824 return (EINVAL); 2825 } 2826#ifdef INVARIANTS 2827 if (p == NULL) 2828 panic("null proc/thread"); 2829#endif 2830 if (addr != NULL) { 2831 switch (addr->sa_family) { 2832#ifdef INET 2833 case AF_INET: 2834 { 2835 struct sockaddr_in *sin; 2836 2837 /* IPV6_V6ONLY socket? */ 2838 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2839 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2840 return (EINVAL); 2841 } 2842 if (addr->sa_len != sizeof(*sin)) { 2843 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2844 return (EINVAL); 2845 } 2846 sin = (struct sockaddr_in *)addr; 2847 lport = sin->sin_port; 2848 /* 2849 * For LOOPBACK the prison_local_ip4() call 2850 * will transmute the ip address to the 2851 * proper value. 2852 */ 2853 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2854 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2855 return (error); 2856 } 2857 if (sin->sin_addr.s_addr != INADDR_ANY) { 2858 bindall = 0; 2859 } 2860 break; 2861 } 2862#endif 2863#ifdef INET6 2864 case AF_INET6: 2865 { 2866 /* 2867 * Only for pure IPv6 Address. (No IPv4 2868 * Mapped!) 2869 */ 2870 struct sockaddr_in6 *sin6; 2871 2872 sin6 = (struct sockaddr_in6 *)addr; 2873 2874 if (addr->sa_len != sizeof(*sin6)) { 2875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2876 return (EINVAL); 2877 } 2878 lport = sin6->sin6_port; 2879 /* 2880 * For LOOPBACK the prison_local_ip6() call 2881 * will transmute the ipv6 address to the 2882 * proper value. 2883 */ 2884 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2885 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2887 return (error); 2888 } 2889 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2890 bindall = 0; 2891 /* KAME hack: embed scopeid */ 2892 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2893 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2894 return (EINVAL); 2895 } 2896 } 2897 /* this must be cleared for ifa_ifwithaddr() */ 2898 sin6->sin6_scope_id = 0; 2899 break; 2900 } 2901#endif 2902 default: 2903 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2904 return (EAFNOSUPPORT); 2905 } 2906 } 2907 SCTP_INP_INFO_WLOCK(); 2908 SCTP_INP_WLOCK(inp); 2909 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2910 vrf_id = inp->def_vrf_id; 2911 2912 /* increase our count due to the unlock we do */ 2913 SCTP_INP_INCR_REF(inp); 2914 if (lport) { 2915 /* 2916 * Did the caller specify a port? if so we must see if an ep 2917 * already has this one bound. 2918 */ 2919 /* got to be root to get at low ports */ 2920 if (ntohs(lport) < IPPORT_RESERVED) { 2921 if (p && (error = 2922 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2923 )) { 2924 SCTP_INP_DECR_REF(inp); 2925 SCTP_INP_WUNLOCK(inp); 2926 SCTP_INP_INFO_WUNLOCK(); 2927 return (error); 2928 } 2929 } 2930 SCTP_INP_WUNLOCK(inp); 2931 if (bindall) { 2932 vrf_id = inp->def_vrf_id; 2933 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2934 if (inp_tmp != NULL) { 2935 /* 2936 * lock guy returned and lower count note 2937 * that we are not bound so inp_tmp should 2938 * NEVER be inp. And it is this inp 2939 * (inp_tmp) that gets the reference bump, 2940 * so we must lower it. 2941 */ 2942 SCTP_INP_DECR_REF(inp_tmp); 2943 /* unlock info */ 2944 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2945 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2946 /* 2947 * Ok, must be one-2-one and 2948 * allowing port re-use 2949 */ 2950 port_reuse_active = 1; 2951 goto continue_anyway; 2952 } 2953 SCTP_INP_DECR_REF(inp); 2954 SCTP_INP_INFO_WUNLOCK(); 2955 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2956 return (EADDRINUSE); 2957 } 2958 } else { 2959 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2960 if (inp_tmp != NULL) { 2961 /* 2962 * lock guy returned and lower count note 2963 * that we are not bound so inp_tmp should 2964 * NEVER be inp. And it is this inp 2965 * (inp_tmp) that gets the reference bump, 2966 * so we must lower it. 2967 */ 2968 SCTP_INP_DECR_REF(inp_tmp); 2969 /* unlock info */ 2970 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2971 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2972 /* 2973 * Ok, must be one-2-one and 2974 * allowing port re-use 2975 */ 2976 port_reuse_active = 1; 2977 goto continue_anyway; 2978 } 2979 SCTP_INP_DECR_REF(inp); 2980 SCTP_INP_INFO_WUNLOCK(); 2981 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2982 return (EADDRINUSE); 2983 } 2984 } 2985continue_anyway: 2986 SCTP_INP_WLOCK(inp); 2987 if (bindall) { 2988 /* verify that no lport is not used by a singleton */ 2989 if ((port_reuse_active == 0) && 2990 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2991 /* Sorry someone already has this one bound */ 2992 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2993 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2994 port_reuse_active = 1; 2995 } else { 2996 SCTP_INP_DECR_REF(inp); 2997 SCTP_INP_WUNLOCK(inp); 2998 SCTP_INP_INFO_WUNLOCK(); 2999 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3000 return (EADDRINUSE); 3001 } 3002 } 3003 } 3004 } else { 3005 uint16_t first, last, candidate; 3006 uint16_t count; 3007 int done; 3008 3009 if (ip_inp->inp_flags & INP_HIGHPORT) { 3010 first = MODULE_GLOBAL(ipport_hifirstauto); 3011 last = MODULE_GLOBAL(ipport_hilastauto); 3012 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3013 if (p && (error = 3014 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3015 )) { 3016 SCTP_INP_DECR_REF(inp); 3017 SCTP_INP_WUNLOCK(inp); 3018 SCTP_INP_INFO_WUNLOCK(); 3019 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3020 return (error); 3021 } 3022 first = MODULE_GLOBAL(ipport_lowfirstauto); 3023 last = MODULE_GLOBAL(ipport_lowlastauto); 3024 } else { 3025 first = MODULE_GLOBAL(ipport_firstauto); 3026 last = MODULE_GLOBAL(ipport_lastauto); 3027 } 3028 if (first > last) { 3029 uint16_t temp; 3030 3031 temp = first; 3032 first = last; 3033 last = temp; 3034 } 3035 count = last - first + 1; /* number of candidates */ 3036 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3037 3038 done = 0; 3039 while (!done) { 3040 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3041 done = 1; 3042 } 3043 if (!done) { 3044 if (--count == 0) { 3045 SCTP_INP_DECR_REF(inp); 3046 SCTP_INP_WUNLOCK(inp); 3047 SCTP_INP_INFO_WUNLOCK(); 3048 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3049 return (EADDRINUSE); 3050 } 3051 if (candidate == last) 3052 candidate = first; 3053 else 3054 candidate = candidate + 1; 3055 } 3056 } 3057 lport = htons(candidate); 3058 } 3059 SCTP_INP_DECR_REF(inp); 3060 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3061 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3062 /* 3063 * this really should not happen. The guy did a non-blocking 3064 * bind and then did a close at the same time. 3065 */ 3066 SCTP_INP_WUNLOCK(inp); 3067 SCTP_INP_INFO_WUNLOCK(); 3068 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3069 return (EINVAL); 3070 } 3071 /* ok we look clear to give out this port, so lets setup the binding */ 3072 if (bindall) { 3073 /* binding to all addresses, so just set in the proper flags */ 3074 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3075 /* set the automatic addr changes from kernel flag */ 3076 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3077 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3078 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3079 } else { 3080 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3081 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3082 } 3083 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3084 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3085 } else { 3086 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3087 } 3088 /* 3089 * set the automatic mobility_base from kernel flag (by 3090 * micchie) 3091 */ 3092 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3093 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3094 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3095 } else { 3096 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3097 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3098 } 3099 /* 3100 * set the automatic mobility_fasthandoff from kernel flag 3101 * (by micchie) 3102 */ 3103 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3106 } else { 3107 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3109 } 3110 } else { 3111 /* 3112 * bind specific, make sure flags is off and add a new 3113 * address structure to the sctp_addr_list inside the ep 3114 * structure. 3115 * 3116 * We will need to allocate one and insert it at the head. The 3117 * socketopt call can just insert new addresses in there as 3118 * well. It will also have to do the embed scope kame hack 3119 * too (before adding). 3120 */ 3121 struct sctp_ifa *ifa; 3122 struct sockaddr_storage store_sa; 3123 3124 memset(&store_sa, 0, sizeof(store_sa)); 3125 switch (addr->sa_family) { 3126#ifdef INET 3127 case AF_INET: 3128 { 3129 struct sockaddr_in *sin; 3130 3131 sin = (struct sockaddr_in *)&store_sa; 3132 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3133 sin->sin_port = 0; 3134 break; 3135 } 3136#endif 3137#ifdef INET6 3138 case AF_INET6: 3139 { 3140 struct sockaddr_in6 *sin6; 3141 3142 sin6 = (struct sockaddr_in6 *)&store_sa; 3143 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3144 sin6->sin6_port = 0; 3145 break; 3146 } 3147#endif 3148 default: 3149 break; 3150 } 3151 /* 3152 * first find the interface with the bound address need to 3153 * zero out the port to find the address! yuck! can't do 3154 * this earlier since need port for sctp_pcb_findep() 3155 */ 3156 if (sctp_ifap != NULL) { 3157 ifa = sctp_ifap; 3158 } else { 3159 /* 3160 * Note for BSD we hit here always other O/S's will 3161 * pass things in via the sctp_ifap argument 3162 * (Panda). 3163 */ 3164 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3165 vrf_id, SCTP_ADDR_NOT_LOCKED); 3166 } 3167 if (ifa == NULL) { 3168 /* Can't find an interface with that address */ 3169 SCTP_INP_WUNLOCK(inp); 3170 SCTP_INP_INFO_WUNLOCK(); 3171 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3172 return (EADDRNOTAVAIL); 3173 } 3174#ifdef INET6 3175 if (addr->sa_family == AF_INET6) { 3176 /* GAK, more FIXME IFA lock? */ 3177 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3178 /* Can't bind a non-existent addr. */ 3179 SCTP_INP_WUNLOCK(inp); 3180 SCTP_INP_INFO_WUNLOCK(); 3181 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3182 return (EINVAL); 3183 } 3184 } 3185#endif 3186 /* we're not bound all */ 3187 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3188 /* allow bindx() to send ASCONF's for binding changes */ 3189 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3190 /* clear automatic addr changes from kernel flag */ 3191 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3192 3193 /* add this address to the endpoint list */ 3194 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3195 if (error != 0) { 3196 SCTP_INP_WUNLOCK(inp); 3197 SCTP_INP_INFO_WUNLOCK(); 3198 return (error); 3199 } 3200 inp->laddr_count++; 3201 } 3202 /* find the bucket */ 3203 if (port_reuse_active) { 3204 /* Put it into tcp 1-2-1 hash */ 3205 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3206 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3207 } else { 3208 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3209 } 3210 /* put it in the bucket */ 3211 LIST_INSERT_HEAD(head, inp, sctp_hash); 3212 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3213 (void *)head, ntohs(lport), port_reuse_active); 3214 /* set in the port */ 3215 inp->sctp_lport = lport; 3216 3217 /* turn off just the unbound flag */ 3218 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3219 SCTP_INP_WUNLOCK(inp); 3220 SCTP_INP_INFO_WUNLOCK(); 3221 return (0); 3222} 3223 3224 3225static void 3226sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3227{ 3228 struct sctp_iterator *it, *nit; 3229 3230 /* 3231 * We enter with the only the ITERATOR_LOCK in place and a write 3232 * lock on the inp_info stuff. 3233 */ 3234 it = sctp_it_ctl.cur_it; 3235 if (it && (it->vn != curvnet)) { 3236 /* Its not looking at our VNET */ 3237 return; 3238 } 3239 if (it && (it->inp == inp)) { 3240 /* 3241 * This is tricky and we hold the iterator lock, but when it 3242 * returns and gets the lock (when we release it) the 3243 * iterator will try to operate on inp. We need to stop that 3244 * from happening. But of course the iterator has a 3245 * reference on the stcb and inp. We can mark it and it will 3246 * stop. 3247 * 3248 * If its a single iterator situation, we set the end iterator 3249 * flag. Otherwise we set the iterator to go to the next 3250 * inp. 3251 * 3252 */ 3253 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3254 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3255 } else { 3256 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3257 } 3258 } 3259 /* 3260 * Now go through and remove any single reference to our inp that 3261 * may be still pending on the list 3262 */ 3263 SCTP_IPI_ITERATOR_WQ_LOCK(); 3264 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3265 if (it->vn != curvnet) { 3266 continue; 3267 } 3268 if (it->inp == inp) { 3269 /* This one points to me is it inp specific? */ 3270 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3271 /* Remove and free this one */ 3272 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3273 it, sctp_nxt_itr); 3274 if (it->function_atend != NULL) { 3275 (*it->function_atend) (it->pointer, it->val); 3276 } 3277 SCTP_FREE(it, SCTP_M_ITER); 3278 } else { 3279 it->inp = LIST_NEXT(it->inp, sctp_list); 3280 if (it->inp) { 3281 SCTP_INP_INCR_REF(it->inp); 3282 } 3283 } 3284 /* 3285 * When its put in the refcnt is incremented so decr 3286 * it 3287 */ 3288 SCTP_INP_DECR_REF(inp); 3289 } 3290 } 3291 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3292} 3293 3294/* release sctp_inpcb unbind the port */ 3295void 3296sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3297{ 3298 /* 3299 * Here we free a endpoint. We must find it (if it is in the Hash 3300 * table) and remove it from there. Then we must also find it in the 3301 * overall list and remove it from there. After all removals are 3302 * complete then any timer has to be stopped. Then start the actual 3303 * freeing. a) Any local lists. b) Any associations. c) The hash of 3304 * all associations. d) finally the ep itself. 3305 */ 3306 struct sctp_tcb *asoc, *nasoc; 3307 struct sctp_laddr *laddr, *nladdr; 3308 struct inpcb *ip_pcb; 3309 struct socket *so; 3310 int being_refed = 0; 3311 struct sctp_queued_to_read *sq, *nsq; 3312 int cnt; 3313 sctp_sharedkey_t *shared_key, *nshared_key; 3314 3315 3316#ifdef SCTP_LOG_CLOSING 3317 sctp_log_closing(inp, NULL, 0); 3318#endif 3319 SCTP_ITERATOR_LOCK(); 3320 /* mark any iterators on the list or being processed */ 3321 sctp_iterator_inp_being_freed(inp); 3322 SCTP_ITERATOR_UNLOCK(); 3323 so = inp->sctp_socket; 3324 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3325 /* been here before.. eeks.. get out of here */ 3326 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3327#ifdef SCTP_LOG_CLOSING 3328 sctp_log_closing(inp, NULL, 1); 3329#endif 3330 return; 3331 } 3332 SCTP_ASOC_CREATE_LOCK(inp); 3333 SCTP_INP_INFO_WLOCK(); 3334 3335 SCTP_INP_WLOCK(inp); 3336 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3337 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3338 /* socket is gone, so no more wakeups allowed */ 3339 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3340 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3341 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3342 3343 } 3344 /* First time through we have the socket lock, after that no more. */ 3345 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3346 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3347 3348 if (inp->control) { 3349 sctp_m_freem(inp->control); 3350 inp->control = NULL; 3351 } 3352 if (inp->pkt) { 3353 sctp_m_freem(inp->pkt); 3354 inp->pkt = NULL; 3355 } 3356 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3357 * here but I will be nice :> (i.e. 3358 * ip_pcb = ep;) */ 3359 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3360 int cnt_in_sd; 3361 3362 cnt_in_sd = 0; 3363 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3364 SCTP_TCB_LOCK(asoc); 3365 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3366 /* Skip guys being freed */ 3367 cnt_in_sd++; 3368 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3369 /* 3370 * Special case - we did not start a 3371 * kill timer on the asoc due to it 3372 * was not closed. So go ahead and 3373 * start it now. 3374 */ 3375 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3376 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3377 } 3378 SCTP_TCB_UNLOCK(asoc); 3379 continue; 3380 } 3381 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3382 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3383 (asoc->asoc.total_output_queue_size == 0)) { 3384 /* 3385 * If we have data in queue, we don't want 3386 * to just free since the app may have done, 3387 * send()/close or connect/send/close. And 3388 * it wants the data to get across first. 3389 */ 3390 /* Just abandon things in the front states */ 3391 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3392 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3393 cnt_in_sd++; 3394 } 3395 continue; 3396 } 3397 /* Disconnect the socket please */ 3398 asoc->sctp_socket = NULL; 3399 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3400 if ((asoc->asoc.size_on_reasm_queue > 0) || 3401 (asoc->asoc.control_pdapi) || 3402 (asoc->asoc.size_on_all_streams > 0) || 3403 (so && (so->so_rcv.sb_cc > 0))) { 3404 /* Left with Data unread */ 3405 struct mbuf *op_err; 3406 3407 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3408 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3409 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3410 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3411 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3412 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3413 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3414 } 3415 if (sctp_free_assoc(inp, asoc, 3416 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3417 cnt_in_sd++; 3418 } 3419 continue; 3420 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3421 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3422 (asoc->asoc.stream_queue_cnt == 0)) { 3423 if (asoc->asoc.locked_on_sending) { 3424 goto abort_anyway; 3425 } 3426 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3427 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3428 struct sctp_nets *netp; 3429 3430 /* 3431 * there is nothing queued to send, 3432 * so I send shutdown 3433 */ 3434 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3435 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3436 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3437 } 3438 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3439 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3440 sctp_stop_timers_for_shutdown(asoc); 3441 if (asoc->asoc.alternate) { 3442 netp = asoc->asoc.alternate; 3443 } else { 3444 netp = asoc->asoc.primary_destination; 3445 } 3446 sctp_send_shutdown(asoc, netp); 3447 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3448 netp); 3449 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3450 asoc->asoc.primary_destination); 3451 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3452 } 3453 } else { 3454 /* mark into shutdown pending */ 3455 struct sctp_stream_queue_pending *sp; 3456 3457 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3458 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3459 asoc->asoc.primary_destination); 3460 if (asoc->asoc.locked_on_sending) { 3461 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3462 sctp_streamhead); 3463 if (sp == NULL) { 3464 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3465 (void *)asoc->asoc.locked_on_sending, 3466 asoc->asoc.locked_on_sending->stream_no); 3467 } else { 3468 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3469 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3470 } 3471 } 3472 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3473 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3474 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3475 struct mbuf *op_err; 3476 3477 abort_anyway: 3478 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3479 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3480 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3481 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3482 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3483 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3484 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3485 } 3486 if (sctp_free_assoc(inp, asoc, 3487 SCTP_PCBFREE_NOFORCE, 3488 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3489 cnt_in_sd++; 3490 } 3491 continue; 3492 } else { 3493 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3494 } 3495 } 3496 cnt_in_sd++; 3497 SCTP_TCB_UNLOCK(asoc); 3498 } 3499 /* now is there some left in our SHUTDOWN state? */ 3500 if (cnt_in_sd) { 3501#ifdef SCTP_LOG_CLOSING 3502 sctp_log_closing(inp, NULL, 2); 3503#endif 3504 inp->sctp_socket = NULL; 3505 SCTP_INP_WUNLOCK(inp); 3506 SCTP_ASOC_CREATE_UNLOCK(inp); 3507 SCTP_INP_INFO_WUNLOCK(); 3508 return; 3509 } 3510 } 3511 inp->sctp_socket = NULL; 3512 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3513 SCTP_PCB_FLAGS_UNBOUND) { 3514 /* 3515 * ok, this guy has been bound. It's port is somewhere in 3516 * the SCTP_BASE_INFO(hash table). Remove it! 3517 */ 3518 LIST_REMOVE(inp, sctp_hash); 3519 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3520 } 3521 /* 3522 * If there is a timer running to kill us, forget it, since it may 3523 * have a contest on the INP lock.. which would cause us to die ... 3524 */ 3525 cnt = 0; 3526 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3527 SCTP_TCB_LOCK(asoc); 3528 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3529 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3530 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3531 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3532 } 3533 cnt++; 3534 SCTP_TCB_UNLOCK(asoc); 3535 continue; 3536 } 3537 /* Free associations that are NOT killing us */ 3538 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3539 ((asoc->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 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3544 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3545 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3546 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3547 cnt++; 3548 SCTP_TCB_UNLOCK(asoc); 3549 continue; 3550 } 3551 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3552 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3553 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3554 } 3555 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3556 cnt++; 3557 } 3558 } 3559 if (cnt) { 3560 /* Ok we have someone out there that will kill us */ 3561 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 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 3577 if ((inp->refcount) || 3578 (being_refed) || 3579 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3580 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3581#ifdef SCTP_LOG_CLOSING 3582 sctp_log_closing(inp, NULL, 4); 3583#endif 3584 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3585 SCTP_INP_WUNLOCK(inp); 3586 SCTP_ASOC_CREATE_UNLOCK(inp); 3587 SCTP_INP_INFO_WUNLOCK(); 3588 return; 3589 } 3590 inp->sctp_ep.signature_change.type = 0; 3591 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3592 /* 3593 * Remove it from the list .. last thing we need a lock for. 3594 */ 3595 LIST_REMOVE(inp, sctp_list); 3596 SCTP_INP_WUNLOCK(inp); 3597 SCTP_ASOC_CREATE_UNLOCK(inp); 3598 SCTP_INP_INFO_WUNLOCK(); 3599 /* 3600 * Now we release all locks. Since this INP cannot be found anymore 3601 * except possibly by the kill timer that might be running. We call 3602 * the drain function here. It should hit the case were it sees the 3603 * ACTIVE flag cleared and exit out freeing us to proceed and 3604 * destroy everything. 3605 */ 3606 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3607 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3608 } else { 3609 /* Probably un-needed */ 3610 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3611 } 3612 3613#ifdef SCTP_LOG_CLOSING 3614 sctp_log_closing(inp, NULL, 5); 3615#endif 3616 3617 3618 if ((inp->sctp_asocidhash) != NULL) { 3619 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3620 inp->sctp_asocidhash = NULL; 3621 } 3622 /* sa_ignore FREED_MEMORY */ 3623 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3624 /* Its only abandoned if it had data left */ 3625 if (sq->length) 3626 SCTP_STAT_INCR(sctps_left_abandon); 3627 3628 TAILQ_REMOVE(&inp->read_queue, sq, next); 3629 sctp_free_remote_addr(sq->whoFrom); 3630 if (so) 3631 so->so_rcv.sb_cc -= sq->length; 3632 if (sq->data) { 3633 sctp_m_freem(sq->data); 3634 sq->data = NULL; 3635 } 3636 /* 3637 * no need to free the net count, since at this point all 3638 * assoc's are gone. 3639 */ 3640 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3641 SCTP_DECR_READQ_COUNT(); 3642 } 3643 /* Now the sctp_pcb things */ 3644 /* 3645 * free each asoc if it is not already closed/free. we can't use the 3646 * macro here since le_next will get freed as part of the 3647 * sctp_free_assoc() call. 3648 */ 3649 if (so) { 3650#ifdef IPSEC 3651 ipsec_delete_pcbpolicy(ip_pcb); 3652#endif /* IPSEC */ 3653 3654 /* Unlocks not needed since the socket is gone now */ 3655 } 3656 if (ip_pcb->inp_options) { 3657 (void)sctp_m_free(ip_pcb->inp_options); 3658 ip_pcb->inp_options = 0; 3659 } 3660#ifdef INET6 3661 if (ip_pcb->inp_vflag & INP_IPV6) { 3662 struct in6pcb *in6p; 3663 3664 in6p = (struct in6pcb *)inp; 3665 ip6_freepcbopts(in6p->in6p_outputopts); 3666 } 3667#endif /* INET6 */ 3668 ip_pcb->inp_vflag = 0; 3669 /* free up authentication fields */ 3670 if (inp->sctp_ep.local_auth_chunks != NULL) 3671 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3672 if (inp->sctp_ep.local_hmacs != NULL) 3673 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3674 3675 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3676 LIST_REMOVE(shared_key, next); 3677 sctp_free_sharedkey(shared_key); 3678 /* sa_ignore FREED_MEMORY */ 3679 } 3680 3681 /* 3682 * if we have an address list the following will free the list of 3683 * ifaddr's that are set into this ep. Again macro limitations here, 3684 * since the LIST_FOREACH could be a bad idea. 3685 */ 3686 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3687 sctp_remove_laddr(laddr); 3688 } 3689 3690#ifdef SCTP_TRACK_FREED_ASOCS 3691 /* TEMP CODE */ 3692 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3693 LIST_REMOVE(asoc, sctp_tcblist); 3694 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3695 SCTP_DECR_ASOC_COUNT(); 3696 } 3697 /* *** END TEMP CODE *** */ 3698#endif 3699 /* Now lets see about freeing the EP hash table. */ 3700 if (inp->sctp_tcbhash != NULL) { 3701 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3702 inp->sctp_tcbhash = NULL; 3703 } 3704 /* Now we must put the ep memory back into the zone pool */ 3705 crfree(inp->ip_inp.inp.inp_cred); 3706 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3707 SCTP_INP_LOCK_DESTROY(inp); 3708 SCTP_INP_READ_DESTROY(inp); 3709 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3710 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3711 SCTP_DECR_EP_COUNT(); 3712} 3713 3714 3715struct sctp_nets * 3716sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3717{ 3718 struct sctp_nets *net; 3719 3720 /* locate the address */ 3721 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3722 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3723 return (net); 3724 } 3725 return (NULL); 3726} 3727 3728 3729int 3730sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3731{ 3732 struct sctp_ifa *sctp_ifa; 3733 3734 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3735 if (sctp_ifa) { 3736 return (1); 3737 } else { 3738 return (0); 3739 } 3740} 3741 3742/* 3743 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3744 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3745 * stats of stuff. 3746 */ 3747int 3748sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3749 struct sctp_nets **netp, int set_scope, int from) 3750{ 3751 /* 3752 * The following is redundant to the same lines in the 3753 * sctp_aloc_assoc() but is needed since others call the add address 3754 * function 3755 */ 3756 struct sctp_nets *net, *netfirst; 3757 int addr_inscope; 3758 3759 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3760 from); 3761 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3762 3763 netfirst = sctp_findnet(stcb, newaddr); 3764 if (netfirst) { 3765 /* 3766 * Lie and return ok, we don't want to make the association 3767 * go away for this behavior. It will happen in the TCP 3768 * model in a connected socket. It does not reach the hash 3769 * table until after the association is built so it can't be 3770 * found. Mark as reachable, since the initial creation will 3771 * have been cleared and the NOT_IN_ASSOC flag will have 3772 * been added... and we don't want to end up removing it 3773 * back out. 3774 */ 3775 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3776 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3777 SCTP_ADDR_UNCONFIRMED); 3778 } else { 3779 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3780 } 3781 3782 return (0); 3783 } 3784 addr_inscope = 1; 3785 switch (newaddr->sa_family) { 3786#ifdef INET 3787 case AF_INET: 3788 { 3789 struct sockaddr_in *sin; 3790 3791 sin = (struct sockaddr_in *)newaddr; 3792 if (sin->sin_addr.s_addr == 0) { 3793 /* Invalid address */ 3794 return (-1); 3795 } 3796 /* zero out the bzero area */ 3797 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3798 3799 /* assure len is set */ 3800 sin->sin_len = sizeof(struct sockaddr_in); 3801 if (set_scope) { 3802#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3803 stcb->asoc.scope.ipv4_local_scope = 1; 3804#else 3805 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3806 stcb->asoc.scope.ipv4_local_scope = 1; 3807 } 3808#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3809 } else { 3810 /* Validate the address is in scope */ 3811 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3812 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3813 addr_inscope = 0; 3814 } 3815 } 3816 break; 3817 } 3818#endif 3819#ifdef INET6 3820 case AF_INET6: 3821 { 3822 struct sockaddr_in6 *sin6; 3823 3824 sin6 = (struct sockaddr_in6 *)newaddr; 3825 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3826 /* Invalid address */ 3827 return (-1); 3828 } 3829 /* assure len is set */ 3830 sin6->sin6_len = sizeof(struct sockaddr_in6); 3831 if (set_scope) { 3832 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3833 stcb->asoc.scope.loopback_scope = 1; 3834 stcb->asoc.scope.local_scope = 0; 3835 stcb->asoc.scope.ipv4_local_scope = 1; 3836 stcb->asoc.scope.site_scope = 1; 3837 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3838 /* 3839 * If the new destination is a 3840 * LINK_LOCAL we must have common 3841 * site scope. Don't set the local 3842 * scope since we may not share all 3843 * links, only loopback can do this. 3844 * Links on the local network would 3845 * also be on our private network 3846 * for v4 too. 3847 */ 3848 stcb->asoc.scope.ipv4_local_scope = 1; 3849 stcb->asoc.scope.site_scope = 1; 3850 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3851 /* 3852 * If the new destination is 3853 * SITE_LOCAL then we must have site 3854 * scope in common. 3855 */ 3856 stcb->asoc.scope.site_scope = 1; 3857 } 3858 } else { 3859 /* Validate the address is in scope */ 3860 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3861 (stcb->asoc.scope.loopback_scope == 0)) { 3862 addr_inscope = 0; 3863 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3864 (stcb->asoc.scope.local_scope == 0)) { 3865 addr_inscope = 0; 3866 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3867 (stcb->asoc.scope.site_scope == 0)) { 3868 addr_inscope = 0; 3869 } 3870 } 3871 break; 3872 } 3873#endif 3874 default: 3875 /* not supported family type */ 3876 return (-1); 3877 } 3878 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3879 if (net == NULL) { 3880 return (-1); 3881 } 3882 SCTP_INCR_RADDR_COUNT(); 3883 bzero(net, sizeof(struct sctp_nets)); 3884 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3885 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3886 switch (newaddr->sa_family) { 3887#ifdef INET 3888 case AF_INET: 3889 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3890 break; 3891#endif 3892#ifdef INET6 3893 case AF_INET6: 3894 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3895 break; 3896#endif 3897 default: 3898 break; 3899 } 3900 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3901 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3902 stcb->asoc.scope.loopback_scope = 1; 3903 stcb->asoc.scope.ipv4_local_scope = 1; 3904 stcb->asoc.scope.local_scope = 0; 3905 stcb->asoc.scope.site_scope = 1; 3906 addr_inscope = 1; 3907 } 3908 net->failure_threshold = stcb->asoc.def_net_failure; 3909 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3910 if (addr_inscope == 0) { 3911 net->dest_state = (SCTP_ADDR_REACHABLE | 3912 SCTP_ADDR_OUT_OF_SCOPE); 3913 } else { 3914 if (from == SCTP_ADDR_IS_CONFIRMED) 3915 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3916 net->dest_state = SCTP_ADDR_REACHABLE; 3917 else 3918 net->dest_state = SCTP_ADDR_REACHABLE | 3919 SCTP_ADDR_UNCONFIRMED; 3920 } 3921 /* 3922 * We set this to 0, the timer code knows that this means its an 3923 * initial value 3924 */ 3925 net->rto_needed = 1; 3926 net->RTO = 0; 3927 net->RTO_measured = 0; 3928 stcb->asoc.numnets++; 3929 net->ref_count = 1; 3930 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3931 net->port = stcb->asoc.port; 3932 net->dscp = stcb->asoc.default_dscp; 3933#ifdef INET6 3934 net->flowlabel = stcb->asoc.default_flowlabel; 3935#endif 3936 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3937 net->dest_state |= SCTP_ADDR_NOHB; 3938 } else { 3939 net->dest_state &= ~SCTP_ADDR_NOHB; 3940 } 3941 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3942 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3943 } else { 3944 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3945 } 3946 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3947 /* Init the timer structure */ 3948 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3949 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3950 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3951 3952 /* Now generate a route for this guy */ 3953#ifdef INET6 3954 /* KAME hack: embed scopeid */ 3955 if (newaddr->sa_family == AF_INET6) { 3956 struct sockaddr_in6 *sin6; 3957 3958 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3959 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3960 sin6->sin6_scope_id = 0; 3961 } 3962#endif 3963 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3964 3965 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3966 /* Get source address */ 3967 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3968 stcb, 3969 (sctp_route_t *) & net->ro, 3970 net, 3971 0, 3972 stcb->asoc.vrf_id); 3973 if (net->ro._s_addr != NULL) { 3974 net->src_addr_selected = 1; 3975 /* Now get the interface MTU */ 3976 if (net->ro._s_addr->ifn_p != NULL) { 3977 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3978 } 3979 } else { 3980 net->src_addr_selected = 0; 3981 } 3982 if (net->mtu > 0) { 3983 uint32_t rmtu; 3984 3985 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3986 if (rmtu == 0) { 3987 /* 3988 * Start things off to match mtu of 3989 * interface please. 3990 */ 3991 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3992 net->ro.ro_rt, net->mtu); 3993 } else { 3994 /* 3995 * we take the route mtu over the interface, 3996 * since the route may be leading out the 3997 * loopback, or a different interface. 3998 */ 3999 net->mtu = rmtu; 4000 } 4001 } 4002 } else { 4003 net->src_addr_selected = 0; 4004 } 4005 if (net->mtu == 0) { 4006 switch (newaddr->sa_family) { 4007#ifdef INET 4008 case AF_INET: 4009 net->mtu = SCTP_DEFAULT_MTU; 4010 break; 4011#endif 4012#ifdef INET6 4013 case AF_INET6: 4014 net->mtu = 1280; 4015 break; 4016#endif 4017 default: 4018 break; 4019 } 4020 } 4021#if defined(INET) || defined(INET6) 4022 if (net->port) { 4023 net->mtu -= (uint32_t) sizeof(struct udphdr); 4024 } 4025#endif 4026 if (from == SCTP_ALLOC_ASOC) { 4027 stcb->asoc.smallest_mtu = net->mtu; 4028 } 4029 if (stcb->asoc.smallest_mtu > net->mtu) { 4030 stcb->asoc.smallest_mtu = net->mtu; 4031 } 4032#ifdef INET6 4033 if (newaddr->sa_family == AF_INET6) { 4034 struct sockaddr_in6 *sin6; 4035 4036 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4037 (void)sa6_recoverscope(sin6); 4038 } 4039#endif 4040 4041 /* JRS - Use the congestion control given in the CC module */ 4042 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4043 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4044 4045 /* 4046 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4047 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4048 */ 4049 net->find_pseudo_cumack = 1; 4050 net->find_rtx_pseudo_cumack = 1; 4051 /* Choose an initial flowid. */ 4052 net->flowid = stcb->asoc.my_vtag ^ 4053 ntohs(stcb->rport) ^ 4054 ntohs(stcb->sctp_ep->sctp_lport); 4055#ifdef INVARIANTS 4056 net->flowidset = 1; 4057#endif 4058 if (netp) { 4059 *netp = net; 4060 } 4061 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4062 if (net->ro.ro_rt == 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_rt == 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_rt->rt_ifp != netfirst->ro.ro_rt->rt_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_rt == NULL) { 4096 /* next one has NO route */ 4097 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4098 break; 4099 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_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_rt == NULL) && 4113 (net->ro.ro_rt) && 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 4136static uint32_t 4137sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4138{ 4139 uint32_t id; 4140 struct sctpasochead *head; 4141 struct sctp_tcb *lstcb; 4142 4143 SCTP_INP_WLOCK(inp); 4144try_again: 4145 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4146 /* TSNH */ 4147 SCTP_INP_WUNLOCK(inp); 4148 return (0); 4149 } 4150 /* 4151 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4152 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4153 */ 4154 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4155 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4156 } 4157 id = inp->sctp_associd_counter; 4158 inp->sctp_associd_counter++; 4159 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4160 if (lstcb) { 4161 goto try_again; 4162 } 4163 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4164 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4165 stcb->asoc.in_asocid_hash = 1; 4166 SCTP_INP_WUNLOCK(inp); 4167 return id; 4168} 4169 4170/* 4171 * allocate an association and add it to the endpoint. The caller must be 4172 * careful to add all additional addresses once they are know right away or 4173 * else the assoc will be may experience a blackout scenario. 4174 */ 4175struct sctp_tcb * 4176sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4177 int *error, uint32_t override_tag, uint32_t vrf_id, 4178 struct thread *p 4179) 4180{ 4181 /* note the p argument is only valid in unbound sockets */ 4182 4183 struct sctp_tcb *stcb; 4184 struct sctp_association *asoc; 4185 struct sctpasochead *head; 4186 uint16_t rport; 4187 int err; 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 SCTP_INP_RLOCK(inp); 4206 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4207 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4208 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4209 /* 4210 * If its in the TCP pool, its NOT allowed to create an 4211 * association. The parent listener needs to call 4212 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4213 * off, or connected one does this.. its an error. 4214 */ 4215 SCTP_INP_RUNLOCK(inp); 4216 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4217 *error = EINVAL; 4218 return (NULL); 4219 } 4220 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4221 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4222 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4223 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4224 SCTP_INP_RUNLOCK(inp); 4225 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4226 *error = EINVAL; 4227 return (NULL); 4228 } 4229 } 4230 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4231#ifdef SCTP_DEBUG 4232 if (firstaddr) { 4233 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4234 switch (firstaddr->sa_family) { 4235#ifdef INET 4236 case AF_INET: 4237 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4238 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4239 break; 4240#endif 4241#ifdef INET6 4242 case AF_INET6: 4243 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4244 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4245 break; 4246#endif 4247 default: 4248 break; 4249 } 4250 } else { 4251 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4252 } 4253#endif /* SCTP_DEBUG */ 4254 switch (firstaddr->sa_family) { 4255#ifdef INET 4256 case AF_INET: 4257 { 4258 struct sockaddr_in *sin; 4259 4260 sin = (struct sockaddr_in *)firstaddr; 4261 if ((ntohs(sin->sin_port) == 0) || 4262 (sin->sin_addr.s_addr == INADDR_ANY) || 4263 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4264 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4265 /* Invalid address */ 4266 SCTP_INP_RUNLOCK(inp); 4267 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4268 *error = EINVAL; 4269 return (NULL); 4270 } 4271 rport = sin->sin_port; 4272 break; 4273 } 4274#endif 4275#ifdef INET6 4276 case AF_INET6: 4277 { 4278 struct sockaddr_in6 *sin6; 4279 4280 sin6 = (struct sockaddr_in6 *)firstaddr; 4281 if ((ntohs(sin6->sin6_port) == 0) || 4282 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4283 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4284 /* Invalid address */ 4285 SCTP_INP_RUNLOCK(inp); 4286 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4287 *error = EINVAL; 4288 return (NULL); 4289 } 4290 rport = sin6->sin6_port; 4291 break; 4292 } 4293#endif 4294 default: 4295 /* not supported family type */ 4296 SCTP_INP_RUNLOCK(inp); 4297 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4298 *error = EINVAL; 4299 return (NULL); 4300 } 4301 SCTP_INP_RUNLOCK(inp); 4302 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4303 /* 4304 * If you have not performed a bind, then we need to do the 4305 * ephemeral bind for you. 4306 */ 4307 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4308 (struct sockaddr *)NULL, 4309 (struct sctp_ifa *)NULL, 4310 p 4311 ))) { 4312 /* bind error, probably perm */ 4313 *error = err; 4314 return (NULL); 4315 } 4316 } 4317 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4318 if (stcb == NULL) { 4319 /* out of memory? */ 4320 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4321 *error = ENOMEM; 4322 return (NULL); 4323 } 4324 SCTP_INCR_ASOC_COUNT(); 4325 4326 bzero(stcb, sizeof(*stcb)); 4327 asoc = &stcb->asoc; 4328 4329 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4330 SCTP_TCB_LOCK_INIT(stcb); 4331 SCTP_TCB_SEND_LOCK_INIT(stcb); 4332 stcb->rport = rport; 4333 /* setup back pointer's */ 4334 stcb->sctp_ep = inp; 4335 stcb->sctp_socket = inp->sctp_socket; 4336 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4337 /* failed */ 4338 SCTP_TCB_LOCK_DESTROY(stcb); 4339 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4340 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4341 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4342 SCTP_DECR_ASOC_COUNT(); 4343 *error = err; 4344 return (NULL); 4345 } 4346 /* and the port */ 4347 SCTP_INP_INFO_WLOCK(); 4348 SCTP_INP_WLOCK(inp); 4349 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4350 /* inpcb freed while alloc going on */ 4351 SCTP_TCB_LOCK_DESTROY(stcb); 4352 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4353 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4354 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4355 SCTP_INP_WUNLOCK(inp); 4356 SCTP_INP_INFO_WUNLOCK(); 4357 SCTP_DECR_ASOC_COUNT(); 4358 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4359 *error = EINVAL; 4360 return (NULL); 4361 } 4362 SCTP_TCB_LOCK(stcb); 4363 4364 /* now that my_vtag is set, add it to the hash */ 4365 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4366 /* put it in the bucket in the vtag hash of assoc's for the system */ 4367 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4368 SCTP_INP_INFO_WUNLOCK(); 4369 4370 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4371 /* failure.. memory error? */ 4372 if (asoc->strmout) { 4373 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4374 asoc->strmout = NULL; 4375 } 4376 if (asoc->mapping_array) { 4377 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4378 asoc->mapping_array = NULL; 4379 } 4380 if (asoc->nr_mapping_array) { 4381 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4382 asoc->nr_mapping_array = NULL; 4383 } 4384 SCTP_DECR_ASOC_COUNT(); 4385 SCTP_TCB_UNLOCK(stcb); 4386 SCTP_TCB_LOCK_DESTROY(stcb); 4387 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4388 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4389 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4390 SCTP_INP_WUNLOCK(inp); 4391 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4392 *error = ENOBUFS; 4393 return (NULL); 4394 } 4395 /* Init all the timers */ 4396 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4397 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4398 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4399 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4400 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4401 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4402 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4403 4404 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4405 /* now file the port under the hash as well */ 4406 if (inp->sctp_tcbhash != NULL) { 4407 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4408 inp->sctp_hashmark)]; 4409 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4410 } 4411 SCTP_INP_WUNLOCK(inp); 4412 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4413 return (stcb); 4414} 4415 4416 4417void 4418sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4419{ 4420 struct sctp_association *asoc; 4421 4422 asoc = &stcb->asoc; 4423 asoc->numnets--; 4424 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4425 if (net == asoc->primary_destination) { 4426 /* Reset primary */ 4427 struct sctp_nets *lnet; 4428 4429 lnet = TAILQ_FIRST(&asoc->nets); 4430 /* 4431 * Mobility adaptation Ideally, if deleted destination is 4432 * the primary, it becomes a fast retransmission trigger by 4433 * the subsequent SET PRIMARY. (by micchie) 4434 */ 4435 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4436 SCTP_MOBILITY_BASE) || 4437 sctp_is_mobility_feature_on(stcb->sctp_ep, 4438 SCTP_MOBILITY_FASTHANDOFF)) { 4439 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4440 if (asoc->deleted_primary != NULL) { 4441 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4442 goto out; 4443 } 4444 asoc->deleted_primary = net; 4445 atomic_add_int(&net->ref_count, 1); 4446 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4447 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4448 sctp_mobility_feature_on(stcb->sctp_ep, 4449 SCTP_MOBILITY_PRIM_DELETED); 4450 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4451 stcb->sctp_ep, stcb, NULL); 4452 } 4453out: 4454 /* Try to find a confirmed primary */ 4455 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4456 } 4457 if (net == asoc->last_data_chunk_from) { 4458 /* Reset primary */ 4459 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4460 } 4461 if (net == asoc->last_control_chunk_from) { 4462 /* Clear net */ 4463 asoc->last_control_chunk_from = NULL; 4464 } 4465 if (net == stcb->asoc.alternate) { 4466 sctp_free_remote_addr(stcb->asoc.alternate); 4467 stcb->asoc.alternate = NULL; 4468 } 4469 sctp_free_remote_addr(net); 4470} 4471 4472/* 4473 * remove a remote endpoint address from an association, it will fail if the 4474 * address does not exist. 4475 */ 4476int 4477sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4478{ 4479 /* 4480 * Here we need to remove a remote address. This is quite simple, we 4481 * first find it in the list of address for the association 4482 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4483 * on that item. Note we do not allow it to be removed if there are 4484 * no other addresses. 4485 */ 4486 struct sctp_association *asoc; 4487 struct sctp_nets *net, *nnet; 4488 4489 asoc = &stcb->asoc; 4490 4491 /* locate the address */ 4492 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4493 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4494 continue; 4495 } 4496 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4497 remaddr)) { 4498 /* we found the guy */ 4499 if (asoc->numnets < 2) { 4500 /* Must have at LEAST two remote addresses */ 4501 return (-1); 4502 } else { 4503 sctp_remove_net(stcb, net); 4504 return (0); 4505 } 4506 } 4507 } 4508 /* not found. */ 4509 return (-2); 4510} 4511 4512void 4513sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4514{ 4515 struct sctpvtaghead *chain; 4516 struct sctp_tagblock *twait_block; 4517 int found = 0; 4518 int i; 4519 4520 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4521 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4522 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4523 if ((twait_block->vtag_block[i].v_tag == tag) && 4524 (twait_block->vtag_block[i].lport == lport) && 4525 (twait_block->vtag_block[i].rport == rport)) { 4526 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4527 twait_block->vtag_block[i].v_tag = 0; 4528 twait_block->vtag_block[i].lport = 0; 4529 twait_block->vtag_block[i].rport = 0; 4530 found = 1; 4531 break; 4532 } 4533 } 4534 if (found) 4535 break; 4536 } 4537} 4538 4539int 4540sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4541{ 4542 struct sctpvtaghead *chain; 4543 struct sctp_tagblock *twait_block; 4544 int found = 0; 4545 int i; 4546 4547 SCTP_INP_INFO_WLOCK(); 4548 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4549 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4550 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4551 if ((twait_block->vtag_block[i].v_tag == tag) && 4552 (twait_block->vtag_block[i].lport == lport) && 4553 (twait_block->vtag_block[i].rport == rport)) { 4554 found = 1; 4555 break; 4556 } 4557 } 4558 if (found) 4559 break; 4560 } 4561 SCTP_INP_INFO_WUNLOCK(); 4562 return (found); 4563} 4564 4565 4566void 4567sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4568{ 4569 struct sctpvtaghead *chain; 4570 struct sctp_tagblock *twait_block; 4571 struct timeval now; 4572 int set, i; 4573 4574 if (time == 0) { 4575 /* Its disabled */ 4576 return; 4577 } 4578 (void)SCTP_GETTIME_TIMEVAL(&now); 4579 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4580 set = 0; 4581 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4582 /* Block(s) present, lets find space, and expire on the fly */ 4583 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4584 if ((twait_block->vtag_block[i].v_tag == 0) && 4585 !set) { 4586 twait_block->vtag_block[i].tv_sec_at_expire = 4587 now.tv_sec + time; 4588 twait_block->vtag_block[i].v_tag = tag; 4589 twait_block->vtag_block[i].lport = lport; 4590 twait_block->vtag_block[i].rport = rport; 4591 set = 1; 4592 } else if ((twait_block->vtag_block[i].v_tag) && 4593 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4594 /* Audit expires this guy */ 4595 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4596 twait_block->vtag_block[i].v_tag = 0; 4597 twait_block->vtag_block[i].lport = 0; 4598 twait_block->vtag_block[i].rport = 0; 4599 if (set == 0) { 4600 /* Reuse it for my new tag */ 4601 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4602 twait_block->vtag_block[i].v_tag = tag; 4603 twait_block->vtag_block[i].lport = lport; 4604 twait_block->vtag_block[i].rport = rport; 4605 set = 1; 4606 } 4607 } 4608 } 4609 if (set) { 4610 /* 4611 * We only do up to the block where we can place our 4612 * tag for audits 4613 */ 4614 break; 4615 } 4616 } 4617 /* Need to add a new block to chain */ 4618 if (!set) { 4619 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4620 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4621 if (twait_block == NULL) { 4622#ifdef INVARIANTS 4623 panic("Can not alloc tagblock"); 4624#endif 4625 return; 4626 } 4627 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4628 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4629 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4630 twait_block->vtag_block[0].v_tag = tag; 4631 twait_block->vtag_block[0].lport = lport; 4632 twait_block->vtag_block[0].rport = rport; 4633 } 4634} 4635 4636 4637 4638/*- 4639 * Free the association after un-hashing the remote port. This 4640 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4641 * expect that the input to this function IS a locked TCB. 4642 * It will return 0, if it did NOT destroy the association (instead 4643 * it unlocks it. It will return NON-zero if it either destroyed the 4644 * association OR the association is already destroyed. 4645 */ 4646int 4647sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4648{ 4649 int i; 4650 struct sctp_association *asoc; 4651 struct sctp_nets *net, *nnet; 4652 struct sctp_laddr *laddr, *naddr; 4653 struct sctp_tmit_chunk *chk, *nchk; 4654 struct sctp_asconf_addr *aparam, *naparam; 4655 struct sctp_asconf_ack *aack, *naack; 4656 struct sctp_stream_reset_list *strrst, *nstrrst; 4657 struct sctp_queued_to_read *sq, *nsq; 4658 struct sctp_stream_queue_pending *sp, *nsp; 4659 sctp_sharedkey_t *shared_key, *nshared_key; 4660 struct socket *so; 4661 4662 /* first, lets purge the entry from the hash table. */ 4663 4664#ifdef SCTP_LOG_CLOSING 4665 sctp_log_closing(inp, stcb, 6); 4666#endif 4667 if (stcb->asoc.state == 0) { 4668#ifdef SCTP_LOG_CLOSING 4669 sctp_log_closing(inp, NULL, 7); 4670#endif 4671 /* there is no asoc, really TSNH :-0 */ 4672 return (1); 4673 } 4674 if (stcb->asoc.alternate) { 4675 sctp_free_remote_addr(stcb->asoc.alternate); 4676 stcb->asoc.alternate = NULL; 4677 } 4678 /* TEMP CODE */ 4679 if (stcb->freed_from_where == 0) { 4680 /* Only record the first place free happened from */ 4681 stcb->freed_from_where = from_location; 4682 } 4683 /* TEMP CODE */ 4684 4685 asoc = &stcb->asoc; 4686 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4687 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4688 /* nothing around */ 4689 so = NULL; 4690 else 4691 so = inp->sctp_socket; 4692 4693 /* 4694 * We used timer based freeing if a reader or writer is in the way. 4695 * So we first check if we are actually being called from a timer, 4696 * if so we abort early if a reader or writer is still in the way. 4697 */ 4698 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4699 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4700 /* 4701 * is it the timer driving us? if so are the reader/writers 4702 * gone? 4703 */ 4704 if (stcb->asoc.refcnt) { 4705 /* nope, reader or writer in the way */ 4706 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4707 /* no asoc destroyed */ 4708 SCTP_TCB_UNLOCK(stcb); 4709#ifdef SCTP_LOG_CLOSING 4710 sctp_log_closing(inp, stcb, 8); 4711#endif 4712 return (0); 4713 } 4714 } 4715 /* now clean up any other timers */ 4716 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4717 asoc->dack_timer.self = NULL; 4718 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4719 /*- 4720 * For stream reset we don't blast this unless 4721 * it is a str-reset timer, it might be the 4722 * free-asoc timer which we DON'T want to 4723 * disturb. 4724 */ 4725 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4726 asoc->strreset_timer.self = NULL; 4727 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4728 asoc->asconf_timer.self = NULL; 4729 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4730 asoc->autoclose_timer.self = NULL; 4731 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4732 asoc->shut_guard_timer.self = NULL; 4733 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4734 asoc->delayed_event_timer.self = NULL; 4735 /* Mobility adaptation */ 4736 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4737 asoc->delete_prim_timer.self = NULL; 4738 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4739 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4740 net->rxt_timer.self = NULL; 4741 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4742 net->pmtu_timer.self = NULL; 4743 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4744 net->hb_timer.self = NULL; 4745 } 4746 /* Now the read queue needs to be cleaned up (only once) */ 4747 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4748 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4749 SCTP_INP_READ_LOCK(inp); 4750 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4751 if (sq->stcb == stcb) { 4752 sq->do_not_ref_stcb = 1; 4753 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4754 /* 4755 * If there is no end, there never will be 4756 * now. 4757 */ 4758 if (sq->end_added == 0) { 4759 /* Held for PD-API clear that. */ 4760 sq->pdapi_aborted = 1; 4761 sq->held_length = 0; 4762 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4763 /* 4764 * Need to add a PD-API 4765 * aborted indication. 4766 * Setting the control_pdapi 4767 * assures that it will be 4768 * added right after this 4769 * msg. 4770 */ 4771 uint32_t strseq; 4772 4773 stcb->asoc.control_pdapi = sq; 4774 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4775 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4776 stcb, 4777 SCTP_PARTIAL_DELIVERY_ABORTED, 4778 (void *)&strseq, 4779 SCTP_SO_LOCKED); 4780 stcb->asoc.control_pdapi = NULL; 4781 } 4782 } 4783 /* Add an end to wake them */ 4784 sq->end_added = 1; 4785 } 4786 } 4787 SCTP_INP_READ_UNLOCK(inp); 4788 if (stcb->block_entry) { 4789 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4790 stcb->block_entry->error = ECONNRESET; 4791 stcb->block_entry = NULL; 4792 } 4793 } 4794 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4795 /* 4796 * Someone holds a reference OR the socket is unaccepted 4797 * yet. 4798 */ 4799 if ((stcb->asoc.refcnt) || 4800 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4801 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4802 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4803 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4804 } 4805 SCTP_TCB_UNLOCK(stcb); 4806 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4807 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4808 /* nothing around */ 4809 so = NULL; 4810 if (so) { 4811 /* Wake any reader/writers */ 4812 sctp_sorwakeup(inp, so); 4813 sctp_sowwakeup(inp, so); 4814 } 4815#ifdef SCTP_LOG_CLOSING 4816 sctp_log_closing(inp, stcb, 9); 4817#endif 4818 /* no asoc destroyed */ 4819 return (0); 4820 } 4821#ifdef SCTP_LOG_CLOSING 4822 sctp_log_closing(inp, stcb, 10); 4823#endif 4824 /* 4825 * When I reach here, no others want to kill the assoc yet.. and I 4826 * own the lock. Now its possible an abort comes in when I do the 4827 * lock exchange below to grab all the locks to do the final take 4828 * out. to prevent this we increment the count, which will start a 4829 * timer and blow out above thus assuring us that we hold exclusive 4830 * killing of the asoc. Note that after getting back the TCB lock we 4831 * will go ahead and increment the counter back up and stop any 4832 * timer a passing stranger may have started :-S 4833 */ 4834 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4835 atomic_add_int(&stcb->asoc.refcnt, 1); 4836 4837 SCTP_TCB_UNLOCK(stcb); 4838 SCTP_INP_INFO_WLOCK(); 4839 SCTP_INP_WLOCK(inp); 4840 SCTP_TCB_LOCK(stcb); 4841 } 4842 /* Double check the GONE flag */ 4843 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4844 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4845 /* nothing around */ 4846 so = NULL; 4847 4848 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4849 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4850 /* 4851 * For TCP type we need special handling when we are 4852 * connected. We also include the peel'ed off ones to. 4853 */ 4854 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4855 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4856 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4857 if (so) { 4858 SOCK_LOCK(so); 4859 if (so->so_rcv.sb_cc == 0) { 4860 so->so_state &= ~(SS_ISCONNECTING | 4861 SS_ISDISCONNECTING | 4862 SS_ISCONFIRMING | 4863 SS_ISCONNECTED); 4864 } 4865 socantrcvmore_locked(so); 4866 sctp_sowwakeup(inp, so); 4867 sctp_sorwakeup(inp, so); 4868 SCTP_SOWAKEUP(so); 4869 } 4870 } 4871 } 4872 /* 4873 * Make it invalid too, that way if its about to run it will abort 4874 * and return. 4875 */ 4876 /* re-increment the lock */ 4877 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4878 atomic_add_int(&stcb->asoc.refcnt, -1); 4879 } 4880 if (stcb->asoc.refcnt) { 4881 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4882 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4883 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4884 SCTP_INP_INFO_WUNLOCK(); 4885 SCTP_INP_WUNLOCK(inp); 4886 } 4887 SCTP_TCB_UNLOCK(stcb); 4888 return (0); 4889 } 4890 asoc->state = 0; 4891 if (inp->sctp_tcbhash) { 4892 LIST_REMOVE(stcb, sctp_tcbhash); 4893 } 4894 if (stcb->asoc.in_asocid_hash) { 4895 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4896 } 4897 /* Now lets remove it from the list of ALL associations in the EP */ 4898 LIST_REMOVE(stcb, sctp_tcblist); 4899 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4900 SCTP_INP_INCR_REF(inp); 4901 SCTP_INP_WUNLOCK(inp); 4902 } 4903 /* pull from vtag hash */ 4904 LIST_REMOVE(stcb, sctp_asocs); 4905 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4906 inp->sctp_lport, stcb->rport); 4907 4908 /* 4909 * Now restop the timers to be sure this is paranoia at is finest! 4910 */ 4911 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4912 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4913 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4914 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4915 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4916 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4917 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4918 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4919 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4920 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4921 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4922 } 4923 4924 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4925 /* 4926 * The chunk lists and such SHOULD be empty but we check them just 4927 * in case. 4928 */ 4929 /* anything on the wheel needs to be removed */ 4930 for (i = 0; i < asoc->streamoutcnt; i++) { 4931 struct sctp_stream_out *outs; 4932 4933 outs = &asoc->strmout[i]; 4934 /* now clean up any chunks here */ 4935 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4936 TAILQ_REMOVE(&outs->outqueue, sp, next); 4937 sctp_free_spbufspace(stcb, asoc, sp); 4938 if (sp->data) { 4939 if (so) { 4940 /* Still an open socket - report */ 4941 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4942 0, (void *)sp, SCTP_SO_LOCKED); 4943 } 4944 if (sp->data) { 4945 sctp_m_freem(sp->data); 4946 sp->data = NULL; 4947 sp->tail_mbuf = NULL; 4948 sp->length = 0; 4949 } 4950 } 4951 if (sp->net) { 4952 sctp_free_remote_addr(sp->net); 4953 sp->net = NULL; 4954 } 4955 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4956 } 4957 } 4958 /* sa_ignore FREED_MEMORY */ 4959 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4960 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4961 SCTP_FREE(strrst, SCTP_M_STRESET); 4962 } 4963 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4964 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4965 if (sq->data) { 4966 sctp_m_freem(sq->data); 4967 sq->data = NULL; 4968 } 4969 sctp_free_remote_addr(sq->whoFrom); 4970 sq->whoFrom = NULL; 4971 sq->stcb = NULL; 4972 /* Free the ctl entry */ 4973 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4974 SCTP_DECR_READQ_COUNT(); 4975 /* sa_ignore FREED_MEMORY */ 4976 } 4977 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4978 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4979 if (chk->data) { 4980 sctp_m_freem(chk->data); 4981 chk->data = NULL; 4982 } 4983 if (chk->holds_key_ref) 4984 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4985 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4986 SCTP_DECR_CHK_COUNT(); 4987 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4988 asoc->free_chunk_cnt--; 4989 /* sa_ignore FREED_MEMORY */ 4990 } 4991 /* pending send queue SHOULD be empty */ 4992 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4993 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4994 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4995#ifdef INVARIANTS 4996 } else { 4997 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4998#endif 4999 } 5000 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5001 if (chk->data) { 5002 if (so) { 5003 /* Still a socket? */ 5004 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5005 0, chk, SCTP_SO_LOCKED); 5006 } 5007 if (chk->data) { 5008 sctp_m_freem(chk->data); 5009 chk->data = NULL; 5010 } 5011 } 5012 if (chk->holds_key_ref) 5013 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5014 if (chk->whoTo) { 5015 sctp_free_remote_addr(chk->whoTo); 5016 chk->whoTo = NULL; 5017 } 5018 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5019 SCTP_DECR_CHK_COUNT(); 5020 /* sa_ignore FREED_MEMORY */ 5021 } 5022 /* sent queue SHOULD be empty */ 5023 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5024 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5025 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5026 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5027#ifdef INVARIANTS 5028 } else { 5029 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5030#endif 5031 } 5032 } 5033 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5034 if (chk->data) { 5035 if (so) { 5036 /* Still a socket? */ 5037 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5038 0, chk, SCTP_SO_LOCKED); 5039 } 5040 if (chk->data) { 5041 sctp_m_freem(chk->data); 5042 chk->data = NULL; 5043 } 5044 } 5045 if (chk->holds_key_ref) 5046 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5047 sctp_free_remote_addr(chk->whoTo); 5048 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5049 SCTP_DECR_CHK_COUNT(); 5050 /* sa_ignore FREED_MEMORY */ 5051 } 5052#ifdef INVARIANTS 5053 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5054 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5055 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5056 } 5057 } 5058#endif 5059 /* control queue MAY not be empty */ 5060 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5061 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5062 if (chk->data) { 5063 sctp_m_freem(chk->data); 5064 chk->data = NULL; 5065 } 5066 if (chk->holds_key_ref) 5067 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5068 sctp_free_remote_addr(chk->whoTo); 5069 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5070 SCTP_DECR_CHK_COUNT(); 5071 /* sa_ignore FREED_MEMORY */ 5072 } 5073 /* ASCONF queue MAY not be empty */ 5074 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5075 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5076 if (chk->data) { 5077 sctp_m_freem(chk->data); 5078 chk->data = NULL; 5079 } 5080 if (chk->holds_key_ref) 5081 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5082 sctp_free_remote_addr(chk->whoTo); 5083 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5084 SCTP_DECR_CHK_COUNT(); 5085 /* sa_ignore FREED_MEMORY */ 5086 } 5087 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5088 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5089 if (chk->data) { 5090 sctp_m_freem(chk->data); 5091 chk->data = NULL; 5092 } 5093 if (chk->holds_key_ref) 5094 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5095 sctp_free_remote_addr(chk->whoTo); 5096 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5097 SCTP_DECR_CHK_COUNT(); 5098 /* sa_ignore FREED_MEMORY */ 5099 } 5100 5101 if (asoc->mapping_array) { 5102 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5103 asoc->mapping_array = NULL; 5104 } 5105 if (asoc->nr_mapping_array) { 5106 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5107 asoc->nr_mapping_array = NULL; 5108 } 5109 /* the stream outs */ 5110 if (asoc->strmout) { 5111 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5112 asoc->strmout = NULL; 5113 } 5114 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5115 if (asoc->strmin) { 5116 struct sctp_queued_to_read *ctl, *nctl; 5117 5118 for (i = 0; i < asoc->streamincnt; i++) { 5119 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5120 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5121 sctp_free_remote_addr(ctl->whoFrom); 5122 if (ctl->data) { 5123 sctp_m_freem(ctl->data); 5124 ctl->data = NULL; 5125 } 5126 /* 5127 * We don't free the address here since all 5128 * the net's were freed above. 5129 */ 5130 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5131 SCTP_DECR_READQ_COUNT(); 5132 } 5133 } 5134 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5135 asoc->strmin = NULL; 5136 } 5137 asoc->streamincnt = 0; 5138 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5139#ifdef INVARIANTS 5140 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5141 panic("no net's left alloc'ed, or list points to itself"); 5142 } 5143#endif 5144 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5145 sctp_free_remote_addr(net); 5146 } 5147 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5148 /* sa_ignore FREED_MEMORY */ 5149 sctp_remove_laddr(laddr); 5150 } 5151 5152 /* pending asconf (address) parameters */ 5153 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5154 /* sa_ignore FREED_MEMORY */ 5155 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5156 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5157 } 5158 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5159 /* sa_ignore FREED_MEMORY */ 5160 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5161 if (aack->data != NULL) { 5162 sctp_m_freem(aack->data); 5163 } 5164 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5165 } 5166 /* clean up auth stuff */ 5167 if (asoc->local_hmacs) 5168 sctp_free_hmaclist(asoc->local_hmacs); 5169 if (asoc->peer_hmacs) 5170 sctp_free_hmaclist(asoc->peer_hmacs); 5171 5172 if (asoc->local_auth_chunks) 5173 sctp_free_chunklist(asoc->local_auth_chunks); 5174 if (asoc->peer_auth_chunks) 5175 sctp_free_chunklist(asoc->peer_auth_chunks); 5176 5177 sctp_free_authinfo(&asoc->authinfo); 5178 5179 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5180 LIST_REMOVE(shared_key, next); 5181 sctp_free_sharedkey(shared_key); 5182 /* sa_ignore FREED_MEMORY */ 5183 } 5184 5185 /* Insert new items here :> */ 5186 5187 /* Get rid of LOCK */ 5188 SCTP_TCB_UNLOCK(stcb); 5189 SCTP_TCB_LOCK_DESTROY(stcb); 5190 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5191 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5192 SCTP_INP_INFO_WUNLOCK(); 5193 SCTP_INP_RLOCK(inp); 5194 } 5195#ifdef SCTP_TRACK_FREED_ASOCS 5196 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5197 /* now clean up the tasoc itself */ 5198 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5199 SCTP_DECR_ASOC_COUNT(); 5200 } else { 5201 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5202 } 5203#else 5204 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5205 SCTP_DECR_ASOC_COUNT(); 5206#endif 5207 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5208 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5209 /* 5210 * If its NOT the inp_free calling us AND sctp_close 5211 * as been called, we call back... 5212 */ 5213 SCTP_INP_RUNLOCK(inp); 5214 /* 5215 * This will start the kill timer (if we are the 5216 * last one) since we hold an increment yet. But 5217 * this is the only safe way to do this since 5218 * otherwise if the socket closes at the same time 5219 * we are here we might collide in the cleanup. 5220 */ 5221 sctp_inpcb_free(inp, 5222 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5223 SCTP_CALLED_DIRECTLY_NOCMPSET); 5224 SCTP_INP_DECR_REF(inp); 5225 goto out_of; 5226 } else { 5227 /* The socket is still open. */ 5228 SCTP_INP_DECR_REF(inp); 5229 } 5230 } 5231 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5232 SCTP_INP_RUNLOCK(inp); 5233 } 5234out_of: 5235 /* destroyed the asoc */ 5236#ifdef SCTP_LOG_CLOSING 5237 sctp_log_closing(inp, NULL, 11); 5238#endif 5239 return (1); 5240} 5241 5242 5243 5244/* 5245 * determine if a destination is "reachable" based upon the addresses bound 5246 * to the current endpoint (e.g. only v4 or v6 currently bound) 5247 */ 5248/* 5249 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5250 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5251 * types bound as its endpoint 5252 */ 5253int 5254sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5255{ 5256 struct sctp_inpcb *inp; 5257 int answer; 5258 5259 /* 5260 * No locks here, the TCB, in all cases is already locked and an 5261 * assoc is up. There is either a INP lock by the caller applied (in 5262 * asconf case when deleting an address) or NOT in the HB case, 5263 * however if HB then the INP increment is up and the INP will not 5264 * be removed (on top of the fact that we have a TCB lock). So we 5265 * only want to read the sctp_flags, which is either bound-all or 5266 * not.. no protection needed since once an assoc is up you can't be 5267 * changing your binding. 5268 */ 5269 inp = stcb->sctp_ep; 5270 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5271 /* if bound all, destination is not restricted */ 5272 /* 5273 * RRS: Question during lock work: Is this correct? If you 5274 * are bound-all you still might need to obey the V4--V6 5275 * flags??? IMO this bound-all stuff needs to be removed! 5276 */ 5277 return (1); 5278 } 5279 /* NOTE: all "scope" checks are done when local addresses are added */ 5280 switch (destaddr->sa_family) { 5281#ifdef INET6 5282 case AF_INET6: 5283 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5284 break; 5285#endif 5286#ifdef INET 5287 case AF_INET: 5288 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5289 break; 5290#endif 5291 default: 5292 /* invalid family, so it's unreachable */ 5293 answer = 0; 5294 break; 5295 } 5296 return (answer); 5297} 5298 5299/* 5300 * update the inp_vflags on an endpoint 5301 */ 5302static void 5303sctp_update_ep_vflag(struct sctp_inpcb *inp) 5304{ 5305 struct sctp_laddr *laddr; 5306 5307 /* first clear the flag */ 5308 inp->ip_inp.inp.inp_vflag = 0; 5309 /* set the flag based on addresses on the ep list */ 5310 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5311 if (laddr->ifa == NULL) { 5312 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5313 __FUNCTION__); 5314 continue; 5315 } 5316 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5317 continue; 5318 } 5319 switch (laddr->ifa->address.sa.sa_family) { 5320#ifdef INET6 5321 case AF_INET6: 5322 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5323 break; 5324#endif 5325#ifdef INET 5326 case AF_INET: 5327 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5328 break; 5329#endif 5330 default: 5331 break; 5332 } 5333 } 5334} 5335 5336/* 5337 * Add the address to the endpoint local address list There is nothing to be 5338 * done if we are bound to all addresses 5339 */ 5340void 5341sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5342{ 5343 struct sctp_laddr *laddr; 5344 int fnd, error = 0; 5345 5346 fnd = 0; 5347 5348 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5349 /* You are already bound to all. You have it already */ 5350 return; 5351 } 5352#ifdef INET6 5353 if (ifa->address.sa.sa_family == AF_INET6) { 5354 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5355 /* Can't bind a non-useable addr. */ 5356 return; 5357 } 5358 } 5359#endif 5360 /* first, is it already present? */ 5361 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5362 if (laddr->ifa == ifa) { 5363 fnd = 1; 5364 break; 5365 } 5366 } 5367 5368 if (fnd == 0) { 5369 /* Not in the ep list */ 5370 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5371 if (error != 0) 5372 return; 5373 inp->laddr_count++; 5374 /* update inp_vflag flags */ 5375 switch (ifa->address.sa.sa_family) { 5376#ifdef INET6 5377 case AF_INET6: 5378 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5379 break; 5380#endif 5381#ifdef INET 5382 case AF_INET: 5383 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5384 break; 5385#endif 5386 default: 5387 break; 5388 } 5389 } 5390 return; 5391} 5392 5393 5394/* 5395 * select a new (hopefully reachable) destination net (should only be used 5396 * when we deleted an ep addr that is the only usable source address to reach 5397 * the destination net) 5398 */ 5399static void 5400sctp_select_primary_destination(struct sctp_tcb *stcb) 5401{ 5402 struct sctp_nets *net; 5403 5404 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5405 /* for now, we'll just pick the first reachable one we find */ 5406 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5407 continue; 5408 if (sctp_destination_is_reachable(stcb, 5409 (struct sockaddr *)&net->ro._l_addr)) { 5410 /* found a reachable destination */ 5411 stcb->asoc.primary_destination = net; 5412 } 5413 } 5414 /* I can't there from here! ...we're gonna die shortly... */ 5415} 5416 5417 5418/* 5419 * Delete the address from the endpoint local address list There is nothing 5420 * to be done if we are bound to all addresses 5421 */ 5422void 5423sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5424{ 5425 struct sctp_laddr *laddr; 5426 int fnd; 5427 5428 fnd = 0; 5429 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5430 /* You are already bound to all. You have it already */ 5431 return; 5432 } 5433 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5434 if (laddr->ifa == ifa) { 5435 fnd = 1; 5436 break; 5437 } 5438 } 5439 if (fnd && (inp->laddr_count < 2)) { 5440 /* can't delete unless there are at LEAST 2 addresses */ 5441 return; 5442 } 5443 if (fnd) { 5444 /* 5445 * clean up any use of this address go through our 5446 * associations and clear any last_used_address that match 5447 * this one for each assoc, see if a new primary_destination 5448 * is needed 5449 */ 5450 struct sctp_tcb *stcb; 5451 5452 /* clean up "next_addr_touse" */ 5453 if (inp->next_addr_touse == laddr) 5454 /* delete this address */ 5455 inp->next_addr_touse = NULL; 5456 5457 /* clean up "last_used_address" */ 5458 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5459 struct sctp_nets *net; 5460 5461 SCTP_TCB_LOCK(stcb); 5462 if (stcb->asoc.last_used_address == laddr) 5463 /* delete this address */ 5464 stcb->asoc.last_used_address = NULL; 5465 /* 5466 * Now spin through all the nets and purge any ref 5467 * to laddr 5468 */ 5469 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5470 if (net->ro._s_addr && 5471 (net->ro._s_addr->ifa == laddr->ifa)) { 5472 /* Yep, purge src address selected */ 5473 sctp_rtentry_t *rt; 5474 5475 /* delete this address if cached */ 5476 rt = net->ro.ro_rt; 5477 if (rt != NULL) { 5478 RTFREE(rt); 5479 net->ro.ro_rt = NULL; 5480 } 5481 sctp_free_ifa(net->ro._s_addr); 5482 net->ro._s_addr = NULL; 5483 net->src_addr_selected = 0; 5484 } 5485 } 5486 SCTP_TCB_UNLOCK(stcb); 5487 } /* for each tcb */ 5488 /* remove it from the ep list */ 5489 sctp_remove_laddr(laddr); 5490 inp->laddr_count--; 5491 /* update inp_vflag flags */ 5492 sctp_update_ep_vflag(inp); 5493 } 5494 return; 5495} 5496 5497/* 5498 * Add the address to the TCB local address restricted list. 5499 * This is a "pending" address list (eg. addresses waiting for an 5500 * ASCONF-ACK response) and cannot be used as a valid source address. 5501 */ 5502void 5503sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5504{ 5505 struct sctp_laddr *laddr; 5506 struct sctpladdr *list; 5507 5508 /* 5509 * Assumes TCB is locked.. and possibly the INP. May need to 5510 * confirm/fix that if we need it and is not the case. 5511 */ 5512 list = &stcb->asoc.sctp_restricted_addrs; 5513 5514#ifdef INET6 5515 if (ifa->address.sa.sa_family == AF_INET6) { 5516 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5517 /* Can't bind a non-existent addr. */ 5518 return; 5519 } 5520 } 5521#endif 5522 /* does the address already exist? */ 5523 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5524 if (laddr->ifa == ifa) { 5525 return; 5526 } 5527 } 5528 5529 /* add to the list */ 5530 (void)sctp_insert_laddr(list, ifa, 0); 5531 return; 5532} 5533 5534/* 5535 * insert an laddr entry with the given ifa for the desired list 5536 */ 5537int 5538sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5539{ 5540 struct sctp_laddr *laddr; 5541 5542 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5543 if (laddr == NULL) { 5544 /* out of memory? */ 5545 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5546 return (EINVAL); 5547 } 5548 SCTP_INCR_LADDR_COUNT(); 5549 bzero(laddr, sizeof(*laddr)); 5550 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5551 laddr->ifa = ifa; 5552 laddr->action = act; 5553 atomic_add_int(&ifa->refcount, 1); 5554 /* insert it */ 5555 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5556 5557 return (0); 5558} 5559 5560/* 5561 * Remove an laddr entry from the local address list (on an assoc) 5562 */ 5563void 5564sctp_remove_laddr(struct sctp_laddr *laddr) 5565{ 5566 5567 /* remove from the list */ 5568 LIST_REMOVE(laddr, sctp_nxt_addr); 5569 sctp_free_ifa(laddr->ifa); 5570 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5571 SCTP_DECR_LADDR_COUNT(); 5572} 5573 5574/* 5575 * Remove a local address from the TCB local address restricted list 5576 */ 5577void 5578sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5579{ 5580 struct sctp_inpcb *inp; 5581 struct sctp_laddr *laddr; 5582 5583 /* 5584 * This is called by asconf work. It is assumed that a) The TCB is 5585 * locked and b) The INP is locked. This is true in as much as I can 5586 * trace through the entry asconf code where I did these locks. 5587 * Again, the ASCONF code is a bit different in that it does lock 5588 * the INP during its work often times. This must be since we don't 5589 * want other proc's looking up things while what they are looking 5590 * up is changing :-D 5591 */ 5592 5593 inp = stcb->sctp_ep; 5594 /* if subset bound and don't allow ASCONF's, can't delete last */ 5595 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5596 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5597 if (stcb->sctp_ep->laddr_count < 2) { 5598 /* can't delete last address */ 5599 return; 5600 } 5601 } 5602 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5603 /* remove the address if it exists */ 5604 if (laddr->ifa == NULL) 5605 continue; 5606 if (laddr->ifa == ifa) { 5607 sctp_remove_laddr(laddr); 5608 return; 5609 } 5610 } 5611 5612 /* address not found! */ 5613 return; 5614} 5615 5616/* 5617 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5618 */ 5619/* sysctl */ 5620static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5621static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5622 5623 5624 5625#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5626struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5627int *sctp_cpuarry = NULL; 5628void 5629sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5630{ 5631 /* Queue a packet to a processor for the specified core */ 5632 struct sctp_mcore_queue *qent; 5633 struct sctp_mcore_ctrl *wkq; 5634 int need_wake = 0; 5635 5636 if (sctp_mcore_workers == NULL) { 5637 /* Something went way bad during setup */ 5638 sctp_input_with_port(m, off, 0); 5639 return; 5640 } 5641 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5642 (sizeof(struct sctp_mcore_queue)), 5643 SCTP_M_MCORE); 5644 if (qent == NULL) { 5645 /* This is trouble */ 5646 sctp_input_with_port(m, off, 0); 5647 return; 5648 } 5649 qent->vn = curvnet; 5650 qent->m = m; 5651 qent->off = off; 5652 qent->v6 = 0; 5653 wkq = &sctp_mcore_workers[cpu_to_use]; 5654 SCTP_MCORE_QLOCK(wkq); 5655 5656 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5657 if (wkq->running == 0) { 5658 need_wake = 1; 5659 } 5660 SCTP_MCORE_QUNLOCK(wkq); 5661 if (need_wake) { 5662 wakeup(&wkq->running); 5663 } 5664} 5665 5666static void 5667sctp_mcore_thread(void *arg) 5668{ 5669 5670 struct sctp_mcore_ctrl *wkq; 5671 struct sctp_mcore_queue *qent; 5672 5673 wkq = (struct sctp_mcore_ctrl *)arg; 5674 struct mbuf *m; 5675 int off, v6; 5676 5677 /* Wait for first tickle */ 5678 SCTP_MCORE_LOCK(wkq); 5679 wkq->running = 0; 5680 msleep(&wkq->running, 5681 &wkq->core_mtx, 5682 0, "wait for pkt", 0); 5683 SCTP_MCORE_UNLOCK(wkq); 5684 5685 /* Bind to our cpu */ 5686 thread_lock(curthread); 5687 sched_bind(curthread, wkq->cpuid); 5688 thread_unlock(curthread); 5689 5690 /* Now lets start working */ 5691 SCTP_MCORE_LOCK(wkq); 5692 /* Now grab lock and go */ 5693 for (;;) { 5694 SCTP_MCORE_QLOCK(wkq); 5695skip_sleep: 5696 wkq->running = 1; 5697 qent = TAILQ_FIRST(&wkq->que); 5698 if (qent) { 5699 TAILQ_REMOVE(&wkq->que, qent, next); 5700 SCTP_MCORE_QUNLOCK(wkq); 5701 CURVNET_SET(qent->vn); 5702 m = qent->m; 5703 off = qent->off; 5704 v6 = qent->v6; 5705 SCTP_FREE(qent, SCTP_M_MCORE); 5706 if (v6 == 0) { 5707 sctp_input_with_port(m, off, 0); 5708 } else { 5709 SCTP_PRINTF("V6 not yet supported\n"); 5710 sctp_m_freem(m); 5711 } 5712 CURVNET_RESTORE(); 5713 SCTP_MCORE_QLOCK(wkq); 5714 } 5715 wkq->running = 0; 5716 if (!TAILQ_EMPTY(&wkq->que)) { 5717 goto skip_sleep; 5718 } 5719 SCTP_MCORE_QUNLOCK(wkq); 5720 msleep(&wkq->running, 5721 &wkq->core_mtx, 5722 0, "wait for pkt", 0); 5723 } 5724} 5725 5726static void 5727sctp_startup_mcore_threads(void) 5728{ 5729 int i, cpu; 5730 5731 if (mp_ncpus == 1) 5732 return; 5733 5734 if (sctp_mcore_workers != NULL) { 5735 /* 5736 * Already been here in some previous vnet? 5737 */ 5738 return; 5739 } 5740 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5741 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5742 SCTP_M_MCORE); 5743 if (sctp_mcore_workers == NULL) { 5744 /* TSNH I hope */ 5745 return; 5746 } 5747 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5748 sizeof(struct sctp_mcore_ctrl))); 5749 /* Init the structures */ 5750 for (i = 0; i <= mp_maxid; i++) { 5751 TAILQ_INIT(&sctp_mcore_workers[i].que); 5752 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5753 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5754 sctp_mcore_workers[i].cpuid = i; 5755 } 5756 if (sctp_cpuarry == NULL) { 5757 SCTP_MALLOC(sctp_cpuarry, int *, 5758 (mp_ncpus * sizeof(int)), 5759 SCTP_M_MCORE); 5760 i = 0; 5761 CPU_FOREACH(cpu) { 5762 sctp_cpuarry[i] = cpu; 5763 i++; 5764 } 5765 } 5766 /* Now start them all */ 5767 CPU_FOREACH(cpu) { 5768 (void)kproc_create(sctp_mcore_thread, 5769 (void *)&sctp_mcore_workers[cpu], 5770 &sctp_mcore_workers[cpu].thread_proc, 5771 RFPROC, 5772 SCTP_KTHREAD_PAGES, 5773 SCTP_MCORE_NAME); 5774 5775 } 5776} 5777 5778#endif 5779 5780void 5781sctp_pcb_init() 5782{ 5783 /* 5784 * SCTP initialization for the PCB structures should be called by 5785 * the sctp_init() funciton. 5786 */ 5787 int i; 5788 struct timeval tv; 5789 5790 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5791 /* error I was called twice */ 5792 return; 5793 } 5794 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5795 5796#if defined(SCTP_LOCAL_TRACE_BUF) 5797 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5798#endif 5799#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5800 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5801 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5802 SCTP_M_MCORE); 5803#endif 5804 (void)SCTP_GETTIME_TIMEVAL(&tv); 5805#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5806 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5807 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5808 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5809#else 5810 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5811 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5812 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5813#endif 5814 /* init the empty list of (All) Endpoints */ 5815 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5816 5817 5818 /* init the hash table of endpoints */ 5819 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5820 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5821 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5822 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5823 &SCTP_BASE_INFO(hashasocmark)); 5824 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5825 &SCTP_BASE_INFO(hashmark)); 5826 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5827 &SCTP_BASE_INFO(hashtcpmark)); 5828 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5829 5830 5831 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5832 &SCTP_BASE_INFO(hashvrfmark)); 5833 5834 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5835 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5836 /* init the zones */ 5837 /* 5838 * FIX ME: Should check for NULL returns, but if it does fail we are 5839 * doomed to panic anyways... add later maybe. 5840 */ 5841 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5842 sizeof(struct sctp_inpcb), maxsockets); 5843 5844 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5845 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5846 5847 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5848 sizeof(struct sctp_laddr), 5849 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5850 5851 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5852 sizeof(struct sctp_nets), 5853 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5854 5855 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5856 sizeof(struct sctp_tmit_chunk), 5857 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5858 5859 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5860 sizeof(struct sctp_queued_to_read), 5861 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5862 5863 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5864 sizeof(struct sctp_stream_queue_pending), 5865 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5866 5867 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5868 sizeof(struct sctp_asconf), 5869 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5870 5871 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5872 sizeof(struct sctp_asconf_ack), 5873 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5874 5875 5876 /* Master Lock INIT for info structure */ 5877 SCTP_INP_INFO_LOCK_INIT(); 5878 SCTP_STATLOG_INIT_LOCK(); 5879 5880 SCTP_IPI_COUNT_INIT(); 5881 SCTP_IPI_ADDR_INIT(); 5882#ifdef SCTP_PACKET_LOGGING 5883 SCTP_IP_PKTLOG_INIT(); 5884#endif 5885 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5886 5887 SCTP_WQ_ADDR_INIT(); 5888 /* not sure if we need all the counts */ 5889 SCTP_BASE_INFO(ipi_count_ep) = 0; 5890 /* assoc/tcb zone info */ 5891 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5892 /* local addrlist zone info */ 5893 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5894 /* remote addrlist zone info */ 5895 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5896 /* chunk info */ 5897 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5898 5899 /* socket queue zone info */ 5900 SCTP_BASE_INFO(ipi_count_readq) = 0; 5901 5902 /* stream out queue cont */ 5903 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5904 5905 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5906 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5907 5908 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5909 5910 /* Init the TIMEWAIT list */ 5911 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5912 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5913 } 5914 sctp_startup_iterator(); 5915 5916#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5917 sctp_startup_mcore_threads(); 5918#endif 5919 5920 /* 5921 * INIT the default VRF which for BSD is the only one, other O/S's 5922 * may have more. But initially they must start with one and then 5923 * add the VRF's as addresses are added. 5924 */ 5925 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5926} 5927 5928/* 5929 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5930 */ 5931void 5932sctp_pcb_finish(void) 5933{ 5934 struct sctp_vrflist *vrf_bucket; 5935 struct sctp_vrf *vrf, *nvrf; 5936 struct sctp_ifn *ifn, *nifn; 5937 struct sctp_ifa *ifa, *nifa; 5938 struct sctpvtaghead *chain; 5939 struct sctp_tagblock *twait_block, *prev_twait_block; 5940 struct sctp_laddr *wi, *nwi; 5941 int i; 5942 struct sctp_iterator *it, *nit; 5943 5944 /* 5945 * In FreeBSD the iterator thread never exits but we do clean up. 5946 * The only way FreeBSD reaches here is if we have VRF's but we 5947 * still add the ifdef to make it compile on old versions. 5948 */ 5949 SCTP_IPI_ITERATOR_WQ_LOCK(); 5950 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5951 if (it->vn != curvnet) { 5952 continue; 5953 } 5954 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5955 if (it->function_atend != NULL) { 5956 (*it->function_atend) (it->pointer, it->val); 5957 } 5958 SCTP_FREE(it, SCTP_M_ITER); 5959 } 5960 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5961 SCTP_ITERATOR_LOCK(); 5962 if ((sctp_it_ctl.cur_it) && 5963 (sctp_it_ctl.cur_it->vn == curvnet)) { 5964 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5965 } 5966 SCTP_ITERATOR_UNLOCK(); 5967 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5968 SCTP_WQ_ADDR_LOCK(); 5969 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5970 LIST_REMOVE(wi, sctp_nxt_addr); 5971 SCTP_DECR_LADDR_COUNT(); 5972 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5973 } 5974 SCTP_WQ_ADDR_UNLOCK(); 5975 5976 /* 5977 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5978 * destroyed first). 5979 */ 5980 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5981 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5982 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5983 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5984 /* free the ifa */ 5985 LIST_REMOVE(ifa, next_bucket); 5986 LIST_REMOVE(ifa, next_ifa); 5987 SCTP_FREE(ifa, SCTP_M_IFA); 5988 } 5989 /* free the ifn */ 5990 LIST_REMOVE(ifn, next_bucket); 5991 LIST_REMOVE(ifn, next_ifn); 5992 SCTP_FREE(ifn, SCTP_M_IFN); 5993 } 5994 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5995 /* free the vrf */ 5996 LIST_REMOVE(vrf, next_vrf); 5997 SCTP_FREE(vrf, SCTP_M_VRF); 5998 } 5999 /* free the vrf hashes */ 6000 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6001 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6002 6003 /* 6004 * free the TIMEWAIT list elements malloc'd in the function 6005 * sctp_add_vtag_to_timewait()... 6006 */ 6007 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6008 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6009 if (!LIST_EMPTY(chain)) { 6010 prev_twait_block = NULL; 6011 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6012 if (prev_twait_block) { 6013 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6014 } 6015 prev_twait_block = twait_block; 6016 } 6017 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6018 } 6019 } 6020 6021 /* free the locks and mutexes */ 6022#ifdef SCTP_PACKET_LOGGING 6023 SCTP_IP_PKTLOG_DESTROY(); 6024#endif 6025 SCTP_IPI_ADDR_DESTROY(); 6026 SCTP_STATLOG_DESTROY(); 6027 SCTP_INP_INFO_LOCK_DESTROY(); 6028 6029 SCTP_WQ_ADDR_DESTROY(); 6030 6031 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6032 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6033 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6034 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6035 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6036 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6037 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6038 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6039 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6040 /* Get rid of other stuff to */ 6041 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6042 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6043 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6044 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6045 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6046 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6047#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6048 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6049#endif 6050} 6051 6052 6053int 6054sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6055 int offset, int limit, 6056 struct sockaddr *src, struct sockaddr *dst, 6057 struct sockaddr *altsa) 6058{ 6059 /* 6060 * grub through the INIT pulling addresses and loading them to the 6061 * nets structure in the asoc. The from address in the mbuf should 6062 * also be loaded (if it is not already). This routine can be called 6063 * with either INIT or INIT-ACK's as long as the m points to the IP 6064 * packet and the offset points to the beginning of the parameters. 6065 */ 6066 struct sctp_inpcb *inp; 6067 struct sctp_nets *net, *nnet, *net_tmp; 6068 struct sctp_paramhdr *phdr, parm_buf; 6069 struct sctp_tcb *stcb_tmp; 6070 uint16_t ptype, plen; 6071 struct sockaddr *sa; 6072 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6073 struct sctp_auth_random *p_random = NULL; 6074 uint16_t random_len = 0; 6075 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6076 struct sctp_auth_hmac_algo *hmacs = NULL; 6077 uint16_t hmacs_len = 0; 6078 uint8_t saw_asconf = 0; 6079 uint8_t saw_asconf_ack = 0; 6080 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6081 struct sctp_auth_chunk_list *chunks = NULL; 6082 uint16_t num_chunks = 0; 6083 sctp_key_t *new_key; 6084 uint32_t keylen; 6085 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6086 uint8_t ecn_supported; 6087 uint8_t prsctp_supported; 6088 uint8_t nrsack_supported; 6089 6090#ifdef INET 6091 struct sockaddr_in sin; 6092 6093#endif 6094#ifdef INET6 6095 struct sockaddr_in6 sin6; 6096 6097#endif 6098 6099 /* First get the destination address setup too. */ 6100#ifdef INET 6101 memset(&sin, 0, sizeof(sin)); 6102 sin.sin_family = AF_INET; 6103 sin.sin_len = sizeof(sin); 6104 sin.sin_port = stcb->rport; 6105#endif 6106#ifdef INET6 6107 memset(&sin6, 0, sizeof(sin6)); 6108 sin6.sin6_family = AF_INET6; 6109 sin6.sin6_len = sizeof(struct sockaddr_in6); 6110 sin6.sin6_port = stcb->rport; 6111#endif 6112 if (altsa) { 6113 sa = altsa; 6114 } else { 6115 sa = src; 6116 } 6117 /* Turn off ECN until we get through all params */ 6118 ecn_supported = 0; 6119 prsctp_supported = 0; 6120 nrsack_supported = 0; 6121 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6122 /* mark all addresses that we have currently on the list */ 6123 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6124 } 6125 /* does the source address already exist? if so skip it */ 6126 inp = stcb->sctp_ep; 6127 atomic_add_int(&stcb->asoc.refcnt, 1); 6128 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6129 atomic_add_int(&stcb->asoc.refcnt, -1); 6130 6131 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6132 /* we must add the source address */ 6133 /* no scope set here since we have a tcb already. */ 6134 switch (sa->sa_family) { 6135#ifdef INET 6136 case AF_INET: 6137 if (stcb->asoc.scope.ipv4_addr_legal) { 6138 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6139 return (-1); 6140 } 6141 } 6142 break; 6143#endif 6144#ifdef INET6 6145 case AF_INET6: 6146 if (stcb->asoc.scope.ipv6_addr_legal) { 6147 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6148 return (-2); 6149 } 6150 } 6151 break; 6152#endif 6153 default: 6154 break; 6155 } 6156 } else { 6157 if (net_tmp != NULL && stcb_tmp == stcb) { 6158 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6159 } else if (stcb_tmp != stcb) { 6160 /* It belongs to another association? */ 6161 if (stcb_tmp) 6162 SCTP_TCB_UNLOCK(stcb_tmp); 6163 return (-3); 6164 } 6165 } 6166 if (stcb->asoc.state == 0) { 6167 /* the assoc was freed? */ 6168 return (-4); 6169 } 6170 /* 6171 * peer must explicitly turn this on. This may have been initialized 6172 * to be "on" in order to allow local addr changes while INIT's are 6173 * in flight. 6174 */ 6175 stcb->asoc.peer_supports_asconf = 0; 6176 /* now we must go through each of the params. */ 6177 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6178 while (phdr) { 6179 ptype = ntohs(phdr->param_type); 6180 plen = ntohs(phdr->param_length); 6181 /* 6182 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6183 * (uint32_t)ptype, (int)plen); 6184 */ 6185 if (offset + plen > limit) { 6186 break; 6187 } 6188 if (plen == 0) { 6189 break; 6190 } 6191#ifdef INET 6192 if (ptype == SCTP_IPV4_ADDRESS) { 6193 if (stcb->asoc.scope.ipv4_addr_legal) { 6194 struct sctp_ipv4addr_param *p4, p4_buf; 6195 6196 /* ok get the v4 address and check/add */ 6197 phdr = sctp_get_next_param(m, offset, 6198 (struct sctp_paramhdr *)&p4_buf, 6199 sizeof(p4_buf)); 6200 if (plen != sizeof(struct sctp_ipv4addr_param) || 6201 phdr == NULL) { 6202 return (-5); 6203 } 6204 p4 = (struct sctp_ipv4addr_param *)phdr; 6205 sin.sin_addr.s_addr = p4->addr; 6206 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6207 /* Skip multi-cast addresses */ 6208 goto next_param; 6209 } 6210 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6211 (sin.sin_addr.s_addr == INADDR_ANY)) { 6212 goto next_param; 6213 } 6214 sa = (struct sockaddr *)&sin; 6215 inp = stcb->sctp_ep; 6216 atomic_add_int(&stcb->asoc.refcnt, 1); 6217 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6218 dst, stcb); 6219 atomic_add_int(&stcb->asoc.refcnt, -1); 6220 6221 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6222 inp == NULL) { 6223 /* we must add the source address */ 6224 /* 6225 * no scope set since we have a tcb 6226 * already 6227 */ 6228 6229 /* 6230 * we must validate the state again 6231 * here 6232 */ 6233 add_it_now: 6234 if (stcb->asoc.state == 0) { 6235 /* the assoc was freed? */ 6236 return (-7); 6237 } 6238 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6239 return (-8); 6240 } 6241 } else if (stcb_tmp == stcb) { 6242 if (stcb->asoc.state == 0) { 6243 /* the assoc was freed? */ 6244 return (-10); 6245 } 6246 if (net != NULL) { 6247 /* clear flag */ 6248 net->dest_state &= 6249 ~SCTP_ADDR_NOT_IN_ASSOC; 6250 } 6251 } else { 6252 /* 6253 * strange, address is in another 6254 * assoc? straighten out locks. 6255 */ 6256 if (stcb_tmp) { 6257 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6258 /* 6259 * in setup state we 6260 * abort this guy 6261 */ 6262 sctp_abort_an_association(stcb_tmp->sctp_ep, 6263 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6264 goto add_it_now; 6265 } 6266 SCTP_TCB_UNLOCK(stcb_tmp); 6267 } 6268 if (stcb->asoc.state == 0) { 6269 /* the assoc was freed? */ 6270 return (-12); 6271 } 6272 return (-13); 6273 } 6274 } 6275 } else 6276#endif 6277#ifdef INET6 6278 if (ptype == SCTP_IPV6_ADDRESS) { 6279 if (stcb->asoc.scope.ipv6_addr_legal) { 6280 /* ok get the v6 address and check/add */ 6281 struct sctp_ipv6addr_param *p6, p6_buf; 6282 6283 phdr = sctp_get_next_param(m, offset, 6284 (struct sctp_paramhdr *)&p6_buf, 6285 sizeof(p6_buf)); 6286 if (plen != sizeof(struct sctp_ipv6addr_param) || 6287 phdr == NULL) { 6288 return (-14); 6289 } 6290 p6 = (struct sctp_ipv6addr_param *)phdr; 6291 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6292 sizeof(p6->addr)); 6293 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6294 /* Skip multi-cast addresses */ 6295 goto next_param; 6296 } 6297 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6298 /* 6299 * Link local make no sense without 6300 * scope 6301 */ 6302 goto next_param; 6303 } 6304 sa = (struct sockaddr *)&sin6; 6305 inp = stcb->sctp_ep; 6306 atomic_add_int(&stcb->asoc.refcnt, 1); 6307 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6308 dst, stcb); 6309 atomic_add_int(&stcb->asoc.refcnt, -1); 6310 if (stcb_tmp == NULL && 6311 (inp == stcb->sctp_ep || inp == NULL)) { 6312 /* 6313 * we must validate the state again 6314 * here 6315 */ 6316 add_it_now6: 6317 if (stcb->asoc.state == 0) { 6318 /* the assoc was freed? */ 6319 return (-16); 6320 } 6321 /* 6322 * we must add the address, no scope 6323 * set 6324 */ 6325 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6326 return (-17); 6327 } 6328 } else if (stcb_tmp == stcb) { 6329 /* 6330 * we must validate the state again 6331 * here 6332 */ 6333 if (stcb->asoc.state == 0) { 6334 /* the assoc was freed? */ 6335 return (-19); 6336 } 6337 if (net != NULL) { 6338 /* clear flag */ 6339 net->dest_state &= 6340 ~SCTP_ADDR_NOT_IN_ASSOC; 6341 } 6342 } else { 6343 /* 6344 * strange, address is in another 6345 * assoc? straighten out locks. 6346 */ 6347 if (stcb_tmp) 6348 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6349 /* 6350 * in setup state we 6351 * abort this guy 6352 */ 6353 sctp_abort_an_association(stcb_tmp->sctp_ep, 6354 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6355 goto add_it_now6; 6356 } 6357 SCTP_TCB_UNLOCK(stcb_tmp); 6358 6359 if (stcb->asoc.state == 0) { 6360 /* the assoc was freed? */ 6361 return (-21); 6362 } 6363 return (-22); 6364 } 6365 } 6366 } else 6367#endif 6368 if (ptype == SCTP_ECN_CAPABLE) { 6369 ecn_supported = 1; 6370 } else if (ptype == SCTP_ULP_ADAPTATION) { 6371 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6372 struct sctp_adaptation_layer_indication ai, 6373 *aip; 6374 6375 phdr = sctp_get_next_param(m, offset, 6376 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6377 aip = (struct sctp_adaptation_layer_indication *)phdr; 6378 if (aip) { 6379 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6380 stcb->asoc.adaptation_needed = 1; 6381 } 6382 } 6383 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6384 struct sctp_asconf_addr_param lstore, *fee; 6385 int lptype; 6386 struct sockaddr *lsa = NULL; 6387 6388#ifdef INET 6389 struct sctp_asconf_addrv4_param *fii; 6390 6391#endif 6392 6393 stcb->asoc.peer_supports_asconf = 1; 6394 if (plen > sizeof(lstore)) { 6395 return (-23); 6396 } 6397 phdr = sctp_get_next_param(m, offset, 6398 (struct sctp_paramhdr *)&lstore, 6399 min(plen, sizeof(lstore))); 6400 if (phdr == NULL) { 6401 return (-24); 6402 } 6403 fee = (struct sctp_asconf_addr_param *)phdr; 6404 lptype = ntohs(fee->addrp.ph.param_type); 6405 switch (lptype) { 6406#ifdef INET 6407 case SCTP_IPV4_ADDRESS: 6408 if (plen != 6409 sizeof(struct sctp_asconf_addrv4_param)) { 6410 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6411 (int)sizeof(struct sctp_asconf_addrv4_param), 6412 plen); 6413 } else { 6414 fii = (struct sctp_asconf_addrv4_param *)fee; 6415 sin.sin_addr.s_addr = fii->addrp.addr; 6416 lsa = (struct sockaddr *)&sin; 6417 } 6418 break; 6419#endif 6420#ifdef INET6 6421 case SCTP_IPV6_ADDRESS: 6422 if (plen != 6423 sizeof(struct sctp_asconf_addr_param)) { 6424 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6425 (int)sizeof(struct sctp_asconf_addr_param), 6426 plen); 6427 } else { 6428 memcpy(sin6.sin6_addr.s6_addr, 6429 fee->addrp.addr, 6430 sizeof(fee->addrp.addr)); 6431 lsa = (struct sockaddr *)&sin6; 6432 } 6433 break; 6434#endif 6435 default: 6436 break; 6437 } 6438 if (lsa) { 6439 (void)sctp_set_primary_addr(stcb, sa, NULL); 6440 } 6441 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6442 stcb->asoc.peer_supports_nat = 1; 6443 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6444 /* Peer supports pr-sctp */ 6445 prsctp_supported = 1; 6446 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6447 /* A supported extension chunk */ 6448 struct sctp_supported_chunk_types_param *pr_supported; 6449 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6450 int num_ent, i; 6451 6452 phdr = sctp_get_next_param(m, offset, 6453 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6454 if (phdr == NULL) { 6455 return (-25); 6456 } 6457 stcb->asoc.peer_supports_asconf = 0; 6458 stcb->asoc.peer_supports_pktdrop = 0; 6459 stcb->asoc.peer_supports_strreset = 0; 6460 stcb->asoc.peer_supports_auth = 0; 6461 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6462 num_ent = plen - sizeof(struct sctp_paramhdr); 6463 for (i = 0; i < num_ent; i++) { 6464 switch (pr_supported->chunk_types[i]) { 6465 case SCTP_ASCONF: 6466 case SCTP_ASCONF_ACK: 6467 stcb->asoc.peer_supports_asconf = 1; 6468 break; 6469 case SCTP_FORWARD_CUM_TSN: 6470 prsctp_supported = 1; 6471 break; 6472 case SCTP_PACKET_DROPPED: 6473 stcb->asoc.peer_supports_pktdrop = 1; 6474 break; 6475 case SCTP_NR_SELECTIVE_ACK: 6476 nrsack_supported = 1; 6477 break; 6478 case SCTP_STREAM_RESET: 6479 stcb->asoc.peer_supports_strreset = 1; 6480 break; 6481 case SCTP_AUTHENTICATION: 6482 stcb->asoc.peer_supports_auth = 1; 6483 break; 6484 default: 6485 /* one I have not learned yet */ 6486 break; 6487 6488 } 6489 } 6490 } else if (ptype == SCTP_RANDOM) { 6491 if (plen > sizeof(random_store)) 6492 break; 6493 if (got_random) { 6494 /* already processed a RANDOM */ 6495 goto next_param; 6496 } 6497 phdr = sctp_get_next_param(m, offset, 6498 (struct sctp_paramhdr *)random_store, 6499 min(sizeof(random_store), plen)); 6500 if (phdr == NULL) 6501 return (-26); 6502 p_random = (struct sctp_auth_random *)phdr; 6503 random_len = plen - sizeof(*p_random); 6504 /* enforce the random length */ 6505 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6506 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6507 return (-27); 6508 } 6509 got_random = 1; 6510 } else if (ptype == SCTP_HMAC_LIST) { 6511 int num_hmacs; 6512 int i; 6513 6514 if (plen > sizeof(hmacs_store)) 6515 break; 6516 if (got_hmacs) { 6517 /* already processed a HMAC list */ 6518 goto next_param; 6519 } 6520 phdr = sctp_get_next_param(m, offset, 6521 (struct sctp_paramhdr *)hmacs_store, 6522 min(plen, sizeof(hmacs_store))); 6523 if (phdr == NULL) 6524 return (-28); 6525 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6526 hmacs_len = plen - sizeof(*hmacs); 6527 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6528 /* validate the hmac list */ 6529 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6530 return (-29); 6531 } 6532 if (stcb->asoc.peer_hmacs != NULL) 6533 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6534 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6535 if (stcb->asoc.peer_hmacs != NULL) { 6536 for (i = 0; i < num_hmacs; i++) { 6537 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6538 ntohs(hmacs->hmac_ids[i])); 6539 } 6540 } 6541 got_hmacs = 1; 6542 } else if (ptype == SCTP_CHUNK_LIST) { 6543 int i; 6544 6545 if (plen > sizeof(chunks_store)) 6546 break; 6547 if (got_chklist) { 6548 /* already processed a Chunks list */ 6549 goto next_param; 6550 } 6551 phdr = sctp_get_next_param(m, offset, 6552 (struct sctp_paramhdr *)chunks_store, 6553 min(plen, sizeof(chunks_store))); 6554 if (phdr == NULL) 6555 return (-30); 6556 chunks = (struct sctp_auth_chunk_list *)phdr; 6557 num_chunks = plen - sizeof(*chunks); 6558 if (stcb->asoc.peer_auth_chunks != NULL) 6559 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6560 else 6561 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6562 for (i = 0; i < num_chunks; i++) { 6563 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6564 stcb->asoc.peer_auth_chunks); 6565 /* record asconf/asconf-ack if listed */ 6566 if (chunks->chunk_types[i] == SCTP_ASCONF) 6567 saw_asconf = 1; 6568 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6569 saw_asconf_ack = 1; 6570 6571 } 6572 got_chklist = 1; 6573 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6574 (ptype == SCTP_STATE_COOKIE) || 6575 (ptype == SCTP_UNRECOG_PARAM) || 6576 (ptype == SCTP_COOKIE_PRESERVE) || 6577 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6578 (ptype == SCTP_ADD_IP_ADDRESS) || 6579 (ptype == SCTP_DEL_IP_ADDRESS) || 6580 (ptype == SCTP_ERROR_CAUSE_IND) || 6581 (ptype == SCTP_SUCCESS_REPORT)) { 6582 /* don't care */ ; 6583 } else { 6584 if ((ptype & 0x8000) == 0x0000) { 6585 /* 6586 * must stop processing the rest of the 6587 * param's. Any report bits were handled 6588 * with the call to 6589 * sctp_arethere_unrecognized_parameters() 6590 * when the INIT or INIT-ACK was first seen. 6591 */ 6592 break; 6593 } 6594 } 6595 6596next_param: 6597 offset += SCTP_SIZE32(plen); 6598 if (offset >= limit) { 6599 break; 6600 } 6601 phdr = sctp_get_next_param(m, offset, &parm_buf, 6602 sizeof(parm_buf)); 6603 } 6604 /* Now check to see if we need to purge any addresses */ 6605 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6606 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6607 SCTP_ADDR_NOT_IN_ASSOC) { 6608 /* This address has been removed from the asoc */ 6609 /* remove and free it */ 6610 stcb->asoc.numnets--; 6611 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6612 sctp_free_remote_addr(net); 6613 if (net == stcb->asoc.primary_destination) { 6614 stcb->asoc.primary_destination = NULL; 6615 sctp_select_primary_destination(stcb); 6616 } 6617 } 6618 } 6619 stcb->asoc.ecn_supported &= ecn_supported; 6620 stcb->asoc.prsctp_supported &= prsctp_supported; 6621 stcb->asoc.nrsack_supported &= nrsack_supported; 6622 /* validate authentication required parameters */ 6623 if (got_random && got_hmacs) { 6624 stcb->asoc.peer_supports_auth = 1; 6625 } else { 6626 stcb->asoc.peer_supports_auth = 0; 6627 } 6628 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6629 /* peer does not support auth but sent a chunks list? */ 6630 return (-31); 6631 } 6632 if (stcb->asoc.peer_supports_asconf && !stcb->asoc.peer_supports_auth) { 6633 /* peer supports asconf but not auth? */ 6634 return (-32); 6635 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6636 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6637 return (-33); 6638 } 6639 /* concatenate the full random key */ 6640 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6641 if (chunks != NULL) { 6642 keylen += sizeof(*chunks) + num_chunks; 6643 } 6644 new_key = sctp_alloc_key(keylen); 6645 if (new_key != NULL) { 6646 /* copy in the RANDOM */ 6647 if (p_random != NULL) { 6648 keylen = sizeof(*p_random) + random_len; 6649 bcopy(p_random, new_key->key, keylen); 6650 } 6651 /* append in the AUTH chunks */ 6652 if (chunks != NULL) { 6653 bcopy(chunks, new_key->key + keylen, 6654 sizeof(*chunks) + num_chunks); 6655 keylen += sizeof(*chunks) + num_chunks; 6656 } 6657 /* append in the HMACs */ 6658 if (hmacs != NULL) { 6659 bcopy(hmacs, new_key->key + keylen, 6660 sizeof(*hmacs) + hmacs_len); 6661 } 6662 } else { 6663 /* failed to get memory for the key */ 6664 return (-34); 6665 } 6666 if (stcb->asoc.authinfo.peer_random != NULL) 6667 sctp_free_key(stcb->asoc.authinfo.peer_random); 6668 stcb->asoc.authinfo.peer_random = new_key; 6669 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6670 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6671 6672 return (0); 6673} 6674 6675int 6676sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6677 struct sctp_nets *net) 6678{ 6679 /* make sure the requested primary address exists in the assoc */ 6680 if (net == NULL && sa) 6681 net = sctp_findnet(stcb, sa); 6682 6683 if (net == NULL) { 6684 /* didn't find the requested primary address! */ 6685 return (-1); 6686 } else { 6687 /* set the primary address */ 6688 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6689 /* Must be confirmed, so queue to set */ 6690 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6691 return (0); 6692 } 6693 stcb->asoc.primary_destination = net; 6694 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6695 sctp_free_remote_addr(stcb->asoc.alternate); 6696 stcb->asoc.alternate = NULL; 6697 } 6698 net = TAILQ_FIRST(&stcb->asoc.nets); 6699 if (net != stcb->asoc.primary_destination) { 6700 /* 6701 * first one on the list is NOT the primary 6702 * sctp_cmpaddr() is much more efficient if the 6703 * primary is the first on the list, make it so. 6704 */ 6705 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6706 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6707 } 6708 return (0); 6709 } 6710} 6711 6712int 6713sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6714{ 6715 /* 6716 * This function serves two purposes. It will see if a TAG can be 6717 * re-used and return 1 for yes it is ok and 0 for don't use that 6718 * tag. A secondary function it will do is purge out old tags that 6719 * can be removed. 6720 */ 6721 struct sctpvtaghead *chain; 6722 struct sctp_tagblock *twait_block; 6723 struct sctpasochead *head; 6724 struct sctp_tcb *stcb; 6725 int i; 6726 6727 SCTP_INP_INFO_RLOCK(); 6728 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6729 SCTP_BASE_INFO(hashasocmark))]; 6730 if (head == NULL) { 6731 /* invalid vtag */ 6732 goto skip_vtag_check; 6733 } 6734 LIST_FOREACH(stcb, head, sctp_asocs) { 6735 /* 6736 * We choose not to lock anything here. TCB's can't be 6737 * removed since we have the read lock, so they can't be 6738 * freed on us, same thing for the INP. I may be wrong with 6739 * this assumption, but we will go with it for now :-) 6740 */ 6741 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6742 continue; 6743 } 6744 if (stcb->asoc.my_vtag == tag) { 6745 /* candidate */ 6746 if (stcb->rport != rport) { 6747 continue; 6748 } 6749 if (stcb->sctp_ep->sctp_lport != lport) { 6750 continue; 6751 } 6752 /* Its a used tag set */ 6753 SCTP_INP_INFO_RUNLOCK(); 6754 return (0); 6755 } 6756 } 6757skip_vtag_check: 6758 6759 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6760 /* Now what about timed wait ? */ 6761 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6762 /* 6763 * Block(s) are present, lets see if we have this tag in the 6764 * list 6765 */ 6766 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6767 if (twait_block->vtag_block[i].v_tag == 0) { 6768 /* not used */ 6769 continue; 6770 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6771 now->tv_sec) { 6772 /* Audit expires this guy */ 6773 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6774 twait_block->vtag_block[i].v_tag = 0; 6775 twait_block->vtag_block[i].lport = 0; 6776 twait_block->vtag_block[i].rport = 0; 6777 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6778 (twait_block->vtag_block[i].lport == lport) && 6779 (twait_block->vtag_block[i].rport == rport)) { 6780 /* Bad tag, sorry :< */ 6781 SCTP_INP_INFO_RUNLOCK(); 6782 return (0); 6783 } 6784 } 6785 } 6786 SCTP_INP_INFO_RUNLOCK(); 6787 return (1); 6788} 6789 6790static void 6791sctp_drain_mbufs(struct sctp_tcb *stcb) 6792{ 6793 /* 6794 * We must hunt this association for MBUF's past the cumack (i.e. 6795 * out of order data that we can renege on). 6796 */ 6797 struct sctp_association *asoc; 6798 struct sctp_tmit_chunk *chk, *nchk; 6799 uint32_t cumulative_tsn_p1; 6800 struct sctp_queued_to_read *ctl, *nctl; 6801 int cnt, strmat; 6802 uint32_t gap, i; 6803 int fnd = 0; 6804 6805 /* We look for anything larger than the cum-ack + 1 */ 6806 6807 asoc = &stcb->asoc; 6808 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6809 /* none we can reneg on. */ 6810 return; 6811 } 6812 SCTP_STAT_INCR(sctps_protocol_drains_done); 6813 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6814 cnt = 0; 6815 /* First look in the re-assembly queue */ 6816 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6817 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6818 /* Yep it is above cum-ack */ 6819 cnt++; 6820 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6821 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6822 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6823 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6824 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6825 if (chk->data) { 6826 sctp_m_freem(chk->data); 6827 chk->data = NULL; 6828 } 6829 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6830 } 6831 } 6832 /* Ok that was fun, now we will drain all the inbound streams? */ 6833 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6834 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6835 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6836 /* Yep it is above cum-ack */ 6837 cnt++; 6838 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6839 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6840 sctp_ucount_decr(asoc->cnt_on_all_streams); 6841 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6842 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6843 if (ctl->data) { 6844 sctp_m_freem(ctl->data); 6845 ctl->data = NULL; 6846 } 6847 sctp_free_remote_addr(ctl->whoFrom); 6848 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6849 SCTP_DECR_READQ_COUNT(); 6850 } 6851 } 6852 } 6853 if (cnt) { 6854 /* We must back down to see what the new highest is */ 6855 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6856 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6857 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6858 asoc->highest_tsn_inside_map = i; 6859 fnd = 1; 6860 break; 6861 } 6862 } 6863 if (!fnd) { 6864 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6865 } 6866 /* 6867 * Question, should we go through the delivery queue? The 6868 * only reason things are on here is the app not reading OR 6869 * a p-d-api up. An attacker COULD send enough in to 6870 * initiate the PD-API and then send a bunch of stuff to 6871 * other streams... these would wind up on the delivery 6872 * queue.. and then we would not get to them. But in order 6873 * to do this I then have to back-track and un-deliver 6874 * sequence numbers in streams.. el-yucko. I think for now 6875 * we will NOT look at the delivery queue and leave it to be 6876 * something to consider later. An alternative would be to 6877 * abort the P-D-API with a notification and then deliver 6878 * the data.... Or another method might be to keep track of 6879 * how many times the situation occurs and if we see a 6880 * possible attack underway just abort the association. 6881 */ 6882#ifdef SCTP_DEBUG 6883 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6884#endif 6885 /* 6886 * Now do we need to find a new 6887 * asoc->highest_tsn_inside_map? 6888 */ 6889 asoc->last_revoke_count = cnt; 6890 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6891 /* sa_ignore NO_NULL_CHK */ 6892 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6893 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6894 } 6895 /* 6896 * Another issue, in un-setting the TSN's in the mapping array we 6897 * DID NOT adjust the highest_tsn marker. This will cause one of 6898 * two things to occur. It may cause us to do extra work in checking 6899 * for our mapping array movement. More importantly it may cause us 6900 * to SACK every datagram. This may not be a bad thing though since 6901 * we will recover once we get our cum-ack above and all this stuff 6902 * we dumped recovered. 6903 */ 6904} 6905 6906void 6907sctp_drain() 6908{ 6909 /* 6910 * We must walk the PCB lists for ALL associations here. The system 6911 * is LOW on MBUF's and needs help. This is where reneging will 6912 * occur. We really hope this does NOT happen! 6913 */ 6914 VNET_ITERATOR_DECL(vnet_iter); 6915 VNET_LIST_RLOCK_NOSLEEP(); 6916 VNET_FOREACH(vnet_iter) { 6917 CURVNET_SET(vnet_iter); 6918 struct sctp_inpcb *inp; 6919 struct sctp_tcb *stcb; 6920 6921 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6922 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6923#ifdef VIMAGE 6924 continue; 6925#else 6926 return; 6927#endif 6928 } 6929 SCTP_INP_INFO_RLOCK(); 6930 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6931 /* For each endpoint */ 6932 SCTP_INP_RLOCK(inp); 6933 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6934 /* For each association */ 6935 SCTP_TCB_LOCK(stcb); 6936 sctp_drain_mbufs(stcb); 6937 SCTP_TCB_UNLOCK(stcb); 6938 } 6939 SCTP_INP_RUNLOCK(inp); 6940 } 6941 SCTP_INP_INFO_RUNLOCK(); 6942 CURVNET_RESTORE(); 6943 } 6944 VNET_LIST_RUNLOCK_NOSLEEP(); 6945} 6946 6947/* 6948 * start a new iterator 6949 * iterates through all endpoints and associations based on the pcb_state 6950 * flags and asoc_state. "af" (mandatory) is executed for all matching 6951 * assocs and "ef" (optional) is executed when the iterator completes. 6952 * "inpf" (optional) is executed for each new endpoint as it is being 6953 * iterated through. inpe (optional) is called when the inp completes 6954 * its way through all the stcbs. 6955 */ 6956int 6957sctp_initiate_iterator(inp_func inpf, 6958 asoc_func af, 6959 inp_func inpe, 6960 uint32_t pcb_state, 6961 uint32_t pcb_features, 6962 uint32_t asoc_state, 6963 void *argp, 6964 uint32_t argi, 6965 end_func ef, 6966 struct sctp_inpcb *s_inp, 6967 uint8_t chunk_output_off) 6968{ 6969 struct sctp_iterator *it = NULL; 6970 6971 if (af == NULL) { 6972 return (-1); 6973 } 6974 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6975 SCTP_M_ITER); 6976 if (it == NULL) { 6977 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6978 return (ENOMEM); 6979 } 6980 memset(it, 0, sizeof(*it)); 6981 it->function_assoc = af; 6982 it->function_inp = inpf; 6983 if (inpf) 6984 it->done_current_ep = 0; 6985 else 6986 it->done_current_ep = 1; 6987 it->function_atend = ef; 6988 it->pointer = argp; 6989 it->val = argi; 6990 it->pcb_flags = pcb_state; 6991 it->pcb_features = pcb_features; 6992 it->asoc_state = asoc_state; 6993 it->function_inp_end = inpe; 6994 it->no_chunk_output = chunk_output_off; 6995 it->vn = curvnet; 6996 if (s_inp) { 6997 /* Assume lock is held here */ 6998 it->inp = s_inp; 6999 SCTP_INP_INCR_REF(it->inp); 7000 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7001 } else { 7002 SCTP_INP_INFO_RLOCK(); 7003 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7004 if (it->inp) { 7005 SCTP_INP_INCR_REF(it->inp); 7006 } 7007 SCTP_INP_INFO_RUNLOCK(); 7008 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7009 7010 } 7011 SCTP_IPI_ITERATOR_WQ_LOCK(); 7012 7013 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7014 if (sctp_it_ctl.iterator_running == 0) { 7015 sctp_wakeup_iterator(); 7016 } 7017 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7018 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7019 return (0); 7020} 7021