sctp_bsd_addr.c revision 197288
1/*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * a) Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * b) Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the distribution. 13 * 14 * c) Neither the name of Cisco Systems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31/* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: head/sys/netinet/sctp_bsd_addr.c 197288 2009-09-17 15:11:12Z rrs $"); 35 36#include <netinet/sctp_os.h> 37#include <netinet/sctp_var.h> 38#include <netinet/sctp_pcb.h> 39#include <netinet/sctp_header.h> 40#include <netinet/sctputil.h> 41#include <netinet/sctp_output.h> 42#include <netinet/sctp_bsd_addr.h> 43#include <netinet/sctp_uio.h> 44#include <netinet/sctputil.h> 45#include <netinet/sctp_timer.h> 46#include <netinet/sctp_asconf.h> 47#include <netinet/sctp_sysctl.h> 48#include <netinet/sctp_indata.h> 49#include <sys/unistd.h> 50 51/* Declare all of our malloc named types */ 52 53/* Note to Michael/Peter for mac-os, 54 * I think mac has this too since I 55 * do see the M_PCB type, so I 56 * will also put in the mac file the 57 * MALLOC_DECLARE. If this does not 58 * work for mac uncomment the defines for 59 * the strings that we use in Panda, I put 60 * them in comments in the mac-os file. 61 */ 62MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor"); 63MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array"); 64MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array"); 65MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address"); 66MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator"); 67MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist"); 68MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key"); 69MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list"); 70MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info"); 71MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset"); 72MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer"); 73MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all"); 74MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct"); 75MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct"); 76MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct"); 77MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block"); 78MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list"); 79MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control"); 80MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option"); 81 82#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 83void 84sctp_wakeup_iterator(void) 85{ 86 wakeup(&SCTP_BASE_INFO(iterator_running)); 87} 88 89static void 90sctp_iterator_thread(void *v) 91{ 92 SCTP_IPI_ITERATOR_WQ_LOCK(); 93 SCTP_BASE_INFO(iterator_running) = 0; 94 while (1) { 95 msleep(&SCTP_BASE_INFO(iterator_running), 96 &SCTP_BASE_INFO(ipi_iterator_wq_mtx), 97 0, "waiting_for_work", 0); 98 if (SCTP_BASE_INFO(threads_must_exit)) { 99 kthread_exit(); 100 } 101 sctp_iterator_worker(); 102 } 103} 104 105void 106sctp_startup_iterator(void) 107{ 108 int ret; 109 110 ret = kproc_create(sctp_iterator_thread, 111 (void *)NULL, 112 &SCTP_BASE_INFO(thread_proc), 113 RFPROC, 114 SCTP_KTHREAD_PAGES, 115 SCTP_KTRHEAD_NAME); 116} 117 118#endif 119 120#ifdef INET6 121 122void 123sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa) 124{ 125 struct in6_ifaddr *ifa6; 126 127 ifa6 = (struct in6_ifaddr *)ifa->ifa; 128 ifa->flags = ifa6->ia6_flags; 129 if (!MODULE_GLOBAL(ip6_use_deprecated)) { 130 if (ifa->flags & 131 IN6_IFF_DEPRECATED) { 132 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 133 } else { 134 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE; 135 } 136 } else { 137 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE; 138 } 139 if (ifa->flags & 140 (IN6_IFF_DETACHED | 141 IN6_IFF_ANYCAST | 142 IN6_IFF_NOTREADY)) { 143 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 144 } else { 145 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE; 146 } 147} 148 149#endif /* INET6 */ 150 151 152static uint32_t 153sctp_is_desired_interface_type(struct ifaddr *ifa) 154{ 155 int result; 156 157 /* check the interface type to see if it's one we care about */ 158 switch (ifa->ifa_ifp->if_type) { 159 case IFT_ETHER: 160 case IFT_ISO88023: 161 case IFT_ISO88024: 162 case IFT_ISO88025: 163 case IFT_ISO88026: 164 case IFT_STARLAN: 165 case IFT_P10: 166 case IFT_P80: 167 case IFT_HY: 168 case IFT_FDDI: 169 case IFT_XETHER: 170 case IFT_ISDNBASIC: 171 case IFT_ISDNPRIMARY: 172 case IFT_PTPSERIAL: 173 case IFT_OTHER: 174 case IFT_PPP: 175 case IFT_LOOP: 176 case IFT_SLIP: 177 case IFT_GIF: 178 case IFT_L2VLAN: 179 case IFT_IP: 180 case IFT_IPOVERCDLC: 181 case IFT_IPOVERCLAW: 182 case IFT_VIRTUALIPADDRESS: 183 result = 1; 184 break; 185 default: 186 result = 0; 187 } 188 189 return (result); 190} 191 192 193 194 195static void 196sctp_init_ifns_for_vrf(int vrfid) 197{ 198 /* 199 * Here we must apply ANY locks needed by the IFN we access and also 200 * make sure we lock any IFA that exists as we float through the 201 * list of IFA's 202 */ 203 struct ifnet *ifn; 204 struct ifaddr *ifa; 205 struct in6_ifaddr *ifa6; 206 struct sctp_ifa *sctp_ifa; 207 uint32_t ifa_flags; 208 209 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) { 210 IF_ADDR_LOCK(ifn); 211 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) { 212 if (ifa->ifa_addr == NULL) { 213 continue; 214 } 215 if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) { 216 /* non inet/inet6 skip */ 217 continue; 218 } 219 if (ifa->ifa_addr->sa_family == AF_INET6) { 220 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) { 221 /* skip unspecifed addresses */ 222 continue; 223 } 224 } else { 225 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) { 226 continue; 227 } 228 } 229 if (sctp_is_desired_interface_type(ifa) == 0) { 230 /* non desired type */ 231 continue; 232 } 233 if (ifa->ifa_addr->sa_family == AF_INET6) { 234 ifa6 = (struct in6_ifaddr *)ifa; 235 ifa_flags = ifa6->ia6_flags; 236 } else { 237 ifa_flags = 0; 238 } 239 sctp_ifa = sctp_add_addr_to_vrf(vrfid, 240 (void *)ifn, 241 ifn->if_index, 242 ifn->if_type, 243 ifn->if_xname, 244 (void *)ifa, 245 ifa->ifa_addr, 246 ifa_flags, 247 0); 248 if (sctp_ifa) { 249 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 250 } 251 } 252 IF_ADDR_UNLOCK(ifn); 253 } 254} 255 256void 257sctp_init_vrf_list(int vrfid) 258{ 259 if (vrfid > SCTP_MAX_VRF_ID) 260 /* can't do that */ 261 return; 262 263 /* Don't care about return here */ 264 (void)sctp_allocate_vrf(vrfid); 265 266 /* 267 * Now we need to build all the ifn's for this vrf and there 268 * addresses 269 */ 270 sctp_init_ifns_for_vrf(vrfid); 271} 272 273void 274sctp_addr_change(struct ifaddr *ifa, int cmd) 275{ 276 struct sctp_ifa *ifap = NULL; 277 uint32_t ifa_flags = 0; 278 279 /* 280 * BSD only has one VRF, if this changes we will need to hook in the 281 * right things here to get the id to pass to the address managment 282 * routine. 283 */ 284 if (SCTP_BASE_VAR(first_time) == 0) { 285 /* Special test to see if my ::1 will showup with this */ 286 SCTP_BASE_VAR(first_time) = 1; 287 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID); 288 } 289 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) { 290 /* don't know what to do with this */ 291 return; 292 } 293 if (ifa->ifa_addr == NULL) { 294 return; 295 } 296 if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) { 297 /* non inet/inet6 skip */ 298 return; 299 } 300 if (ifa->ifa_addr->sa_family == AF_INET6) { 301 ifa_flags = ((struct in6_ifaddr *)ifa)->ia6_flags; 302 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) { 303 /* skip unspecifed addresses */ 304 return; 305 } 306 } else { 307 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) { 308 return; 309 } 310 } 311 312 if (sctp_is_desired_interface_type(ifa) == 0) { 313 /* non desired type */ 314 return; 315 } 316 if (cmd == RTM_ADD) { 317 ifap = sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp, 318 ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type, 319 ifa->ifa_ifp->if_xname, 320 (void *)ifa, ifa->ifa_addr, ifa_flags, 1); 321 } else { 322 323 sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr, 324 ifa->ifa_ifp->if_index, 325 ifa->ifa_ifp->if_xname 326 ); 327 /* 328 * We don't bump refcount here so when it completes the 329 * final delete will happen. 330 */ 331 } 332} 333 334void 335 sctp_add_or_del_interfaces(int (*pred) (struct ifnet *), int add){ 336 struct ifnet *ifn; 337 struct ifaddr *ifa; 338 339 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) { 340 if (!(*pred) (ifn)) { 341 continue; 342 } 343 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) { 344 sctp_addr_change(ifa, add ? RTM_ADD : RTM_DELETE); 345 } 346 } 347} 348 349struct mbuf * 350sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header, 351 int how, int allonebuf, int type) 352{ 353 struct mbuf *m = NULL; 354 355 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0); 356 if (m == NULL) { 357 /* bad, no memory */ 358 return (m); 359 } 360 if (allonebuf) { 361 int siz; 362 363 if (SCTP_BUF_IS_EXTENDED(m)) { 364 siz = SCTP_BUF_EXTEND_SIZE(m); 365 } else { 366 if (want_header) 367 siz = MHLEN; 368 else 369 siz = MLEN; 370 } 371 if (siz < space_needed) { 372 m_freem(m); 373 return (NULL); 374 } 375 } 376 if (SCTP_BUF_NEXT(m)) { 377 sctp_m_freem(SCTP_BUF_NEXT(m)); 378 SCTP_BUF_NEXT(m) = NULL; 379 } 380#ifdef SCTP_MBUF_LOGGING 381 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 382 if (SCTP_BUF_IS_EXTENDED(m)) { 383 sctp_log_mb(m, SCTP_MBUF_IALLOC); 384 } 385 } 386#endif 387 return (m); 388} 389 390 391#ifdef SCTP_PACKET_LOGGING 392void 393sctp_packet_log(struct mbuf *m, int length) 394{ 395 int *lenat, thisone; 396 void *copyto; 397 uint32_t *tick_tock; 398 int total_len; 399 int grabbed_lock = 0; 400 int value, newval, thisend, thisbegin; 401 402 /* 403 * Buffer layout. -sizeof this entry (total_len) -previous end 404 * (value) -ticks of log (ticks) o -ip packet o -as logged - 405 * where this started (thisbegin) x <--end points here 406 */ 407 total_len = SCTP_SIZE32((length + (4 * sizeof(int)))); 408 /* Log a packet to the buffer. */ 409 if (total_len > SCTP_PACKET_LOG_SIZE) { 410 /* Can't log this packet I have not a buffer big enough */ 411 return; 412 } 413 if (length < (int)(SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) { 414 return; 415 } 416 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), 1); 417try_again: 418 if (SCTP_BASE_VAR(packet_log_writers) > SCTP_PKTLOG_WRITERS_NEED_LOCK) { 419 SCTP_IP_PKTLOG_LOCK(); 420 grabbed_lock = 1; 421again_locked: 422 value = SCTP_BASE_VAR(packet_log_end); 423 newval = SCTP_BASE_VAR(packet_log_end) + total_len; 424 if (newval >= SCTP_PACKET_LOG_SIZE) { 425 /* we wrapped */ 426 thisbegin = 0; 427 thisend = total_len; 428 } else { 429 thisbegin = SCTP_BASE_VAR(packet_log_end); 430 thisend = newval; 431 } 432 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) { 433 goto again_locked; 434 } 435 } else { 436 value = SCTP_BASE_VAR(packet_log_end); 437 newval = SCTP_BASE_VAR(packet_log_end) + total_len; 438 if (newval >= SCTP_PACKET_LOG_SIZE) { 439 /* we wrapped */ 440 thisbegin = 0; 441 thisend = total_len; 442 } else { 443 thisbegin = SCTP_BASE_VAR(packet_log_end); 444 thisend = newval; 445 } 446 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) { 447 goto try_again; 448 } 449 } 450 /* Sanity check */ 451 if (thisend >= SCTP_PACKET_LOG_SIZE) { 452 printf("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n", 453 thisbegin, 454 thisend, 455 SCTP_BASE_VAR(packet_log_writers), 456 grabbed_lock, 457 SCTP_BASE_VAR(packet_log_end)); 458 SCTP_BASE_VAR(packet_log_end) = 0; 459 goto no_log; 460 461 } 462 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisbegin]; 463 *lenat = total_len; 464 lenat++; 465 *lenat = value; 466 lenat++; 467 tick_tock = (uint32_t *) lenat; 468 lenat++; 469 *tick_tock = sctp_get_tick_count(); 470 copyto = (void *)lenat; 471 thisone = thisend - sizeof(int); 472 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisone]; 473 *lenat = thisbegin; 474 if (grabbed_lock) { 475 SCTP_IP_PKTLOG_UNLOCK(); 476 grabbed_lock = 0; 477 } 478 m_copydata(m, 0, length, (caddr_t)copyto); 479no_log: 480 if (grabbed_lock) { 481 SCTP_IP_PKTLOG_UNLOCK(); 482 } 483 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 1); 484} 485 486 487int 488sctp_copy_out_packet_log(uint8_t * target, int length) 489{ 490 /* 491 * We wind through the packet log starting at start copying up to 492 * length bytes out. We return the number of bytes copied. 493 */ 494 int tocopy, this_copy; 495 int *lenat; 496 int did_delay = 0; 497 498 tocopy = length; 499 if (length < (int)(2 * sizeof(int))) { 500 /* not enough room */ 501 return (0); 502 } 503 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) { 504 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), SCTP_PKTLOG_WRITERS_NEED_LOCK); 505again: 506 if ((did_delay == 0) && (SCTP_BASE_VAR(packet_log_writers) != SCTP_PKTLOG_WRITERS_NEED_LOCK)) { 507 /* 508 * we delay here for just a moment hoping the 509 * writer(s) that were present when we entered will 510 * have left and we only have locking ones that will 511 * contend with us for the lock. This does not 512 * assure 100% access, but its good enough for a 513 * logging facility like this. 514 */ 515 did_delay = 1; 516 DELAY(10); 517 goto again; 518 } 519 } 520 SCTP_IP_PKTLOG_LOCK(); 521 lenat = (int *)target; 522 *lenat = SCTP_BASE_VAR(packet_log_end); 523 lenat++; 524 this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE); 525 memcpy((void *)lenat, (void *)SCTP_BASE_VAR(packet_log_buffer), this_copy); 526 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) { 527 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 528 SCTP_PKTLOG_WRITERS_NEED_LOCK); 529 } 530 SCTP_IP_PKTLOG_UNLOCK(); 531 return (this_copy + sizeof(int)); 532} 533 534#endif 535