sctp_bsd_addr.c revision 197326
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 197326 2009-09-19 14:02:16Z tuexen $"); 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 CURVNET_SET((struct vnet *)v); 93 SCTP_IPI_ITERATOR_WQ_LOCK(); 94 SCTP_BASE_INFO(iterator_running) = 0; 95 while (1) { 96 msleep(&SCTP_BASE_INFO(iterator_running), 97 &SCTP_BASE_INFO(ipi_iterator_wq_mtx), 98 0, "waiting_for_work", 0); 99 if (SCTP_BASE_INFO(threads_must_exit)) { 100 kthread_exit(); 101 } 102 sctp_iterator_worker(); 103 } 104 CURVNET_RESTORE(); 105} 106 107void 108sctp_startup_iterator(void) 109{ 110 int ret; 111 112 ret = kproc_create(sctp_iterator_thread, 113 (void *)curvnet, 114 &SCTP_BASE_INFO(thread_proc), 115 RFPROC, 116 SCTP_KTHREAD_PAGES, 117 SCTP_KTRHEAD_NAME); 118} 119 120#endif 121 122#ifdef INET6 123 124void 125sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa) 126{ 127 struct in6_ifaddr *ifa6; 128 129 ifa6 = (struct in6_ifaddr *)ifa->ifa; 130 ifa->flags = ifa6->ia6_flags; 131 if (!MODULE_GLOBAL(ip6_use_deprecated)) { 132 if (ifa->flags & 133 IN6_IFF_DEPRECATED) { 134 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 135 } else { 136 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE; 137 } 138 } else { 139 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE; 140 } 141 if (ifa->flags & 142 (IN6_IFF_DETACHED | 143 IN6_IFF_ANYCAST | 144 IN6_IFF_NOTREADY)) { 145 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 146 } else { 147 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE; 148 } 149} 150 151#endif /* INET6 */ 152 153 154static uint32_t 155sctp_is_desired_interface_type(struct ifaddr *ifa) 156{ 157 int result; 158 159 /* check the interface type to see if it's one we care about */ 160 switch (ifa->ifa_ifp->if_type) { 161 case IFT_ETHER: 162 case IFT_ISO88023: 163 case IFT_ISO88024: 164 case IFT_ISO88025: 165 case IFT_ISO88026: 166 case IFT_STARLAN: 167 case IFT_P10: 168 case IFT_P80: 169 case IFT_HY: 170 case IFT_FDDI: 171 case IFT_XETHER: 172 case IFT_ISDNBASIC: 173 case IFT_ISDNPRIMARY: 174 case IFT_PTPSERIAL: 175 case IFT_OTHER: 176 case IFT_PPP: 177 case IFT_LOOP: 178 case IFT_SLIP: 179 case IFT_GIF: 180 case IFT_L2VLAN: 181 case IFT_IP: 182 case IFT_IPOVERCDLC: 183 case IFT_IPOVERCLAW: 184 case IFT_VIRTUALIPADDRESS: 185 result = 1; 186 break; 187 default: 188 result = 0; 189 } 190 191 return (result); 192} 193 194 195 196 197static void 198sctp_init_ifns_for_vrf(int vrfid) 199{ 200 /* 201 * Here we must apply ANY locks needed by the IFN we access and also 202 * make sure we lock any IFA that exists as we float through the 203 * list of IFA's 204 */ 205 struct ifnet *ifn; 206 struct ifaddr *ifa; 207 struct in6_ifaddr *ifa6; 208 struct sctp_ifa *sctp_ifa; 209 uint32_t ifa_flags; 210 211#if 0 212 IFNET_RLOCK(); 213#endif 214 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) { 215 IF_ADDR_LOCK(ifn); 216 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) { 217 if (ifa->ifa_addr == NULL) { 218 continue; 219 } 220 if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) { 221 /* non inet/inet6 skip */ 222 continue; 223 } 224 if (ifa->ifa_addr->sa_family == AF_INET6) { 225 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) { 226 /* skip unspecifed addresses */ 227 continue; 228 } 229 } else { 230 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) { 231 continue; 232 } 233 } 234 if (sctp_is_desired_interface_type(ifa) == 0) { 235 /* non desired type */ 236 continue; 237 } 238 if (ifa->ifa_addr->sa_family == AF_INET6) { 239 ifa6 = (struct in6_ifaddr *)ifa; 240 ifa_flags = ifa6->ia6_flags; 241 } else { 242 ifa_flags = 0; 243 } 244 sctp_ifa = sctp_add_addr_to_vrf(vrfid, 245 (void *)ifn, 246 ifn->if_index, 247 ifn->if_type, 248 ifn->if_xname, 249 (void *)ifa, 250 ifa->ifa_addr, 251 ifa_flags, 252 0); 253 if (sctp_ifa) { 254 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 255 } 256 } 257 IF_ADDR_UNLOCK(ifn); 258 } 259#if 0 260 IFNET_RUNLOCK(); 261#endif 262} 263 264void 265sctp_init_vrf_list(int vrfid) 266{ 267 if (vrfid > SCTP_MAX_VRF_ID) 268 /* can't do that */ 269 return; 270 271 /* Don't care about return here */ 272 (void)sctp_allocate_vrf(vrfid); 273 274 /* 275 * Now we need to build all the ifn's for this vrf and there 276 * addresses 277 */ 278 sctp_init_ifns_for_vrf(vrfid); 279} 280 281void 282sctp_addr_change(struct ifaddr *ifa, int cmd) 283{ 284 struct sctp_ifa *ifap = NULL; 285 uint32_t ifa_flags = 0; 286 287 /* 288 * BSD only has one VRF, if this changes we will need to hook in the 289 * right things here to get the id to pass to the address managment 290 * routine. 291 */ 292 if (SCTP_BASE_VAR(first_time) == 0) { 293 /* Special test to see if my ::1 will showup with this */ 294 SCTP_BASE_VAR(first_time) = 1; 295 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID); 296 } 297 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) { 298 /* don't know what to do with this */ 299 return; 300 } 301 if (ifa->ifa_addr == NULL) { 302 return; 303 } 304 if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) { 305 /* non inet/inet6 skip */ 306 return; 307 } 308 if (ifa->ifa_addr->sa_family == AF_INET6) { 309 ifa_flags = ((struct in6_ifaddr *)ifa)->ia6_flags; 310 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) { 311 /* skip unspecifed addresses */ 312 return; 313 } 314 } else { 315 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) { 316 return; 317 } 318 } 319 320 if (sctp_is_desired_interface_type(ifa) == 0) { 321 /* non desired type */ 322 return; 323 } 324 if (cmd == RTM_ADD) { 325 ifap = sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp, 326 ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type, 327 ifa->ifa_ifp->if_xname, 328 (void *)ifa, ifa->ifa_addr, ifa_flags, 1); 329 } else { 330 331 sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr, 332 ifa->ifa_ifp->if_index, 333 ifa->ifa_ifp->if_xname 334 ); 335 /* 336 * We don't bump refcount here so when it completes the 337 * final delete will happen. 338 */ 339 } 340} 341 342void 343 sctp_add_or_del_interfaces(int (*pred) (struct ifnet *), int add){ 344 struct ifnet *ifn; 345 struct ifaddr *ifa; 346 347#if 0 348 IFNET_RLOCK(); 349#endif 350 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) { 351 if (!(*pred) (ifn)) { 352 continue; 353 } 354 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) { 355 sctp_addr_change(ifa, add ? RTM_ADD : RTM_DELETE); 356 } 357 } 358#if 0 359 IFNET_RUNLOCK(); 360#endif 361} 362 363struct mbuf * 364sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header, 365 int how, int allonebuf, int type) 366{ 367 struct mbuf *m = NULL; 368 369 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0); 370 if (m == NULL) { 371 /* bad, no memory */ 372 return (m); 373 } 374 if (allonebuf) { 375 int siz; 376 377 if (SCTP_BUF_IS_EXTENDED(m)) { 378 siz = SCTP_BUF_EXTEND_SIZE(m); 379 } else { 380 if (want_header) 381 siz = MHLEN; 382 else 383 siz = MLEN; 384 } 385 if (siz < space_needed) { 386 m_freem(m); 387 return (NULL); 388 } 389 } 390 if (SCTP_BUF_NEXT(m)) { 391 sctp_m_freem(SCTP_BUF_NEXT(m)); 392 SCTP_BUF_NEXT(m) = NULL; 393 } 394#ifdef SCTP_MBUF_LOGGING 395 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 396 if (SCTP_BUF_IS_EXTENDED(m)) { 397 sctp_log_mb(m, SCTP_MBUF_IALLOC); 398 } 399 } 400#endif 401 return (m); 402} 403 404 405#ifdef SCTP_PACKET_LOGGING 406void 407sctp_packet_log(struct mbuf *m, int length) 408{ 409 int *lenat, thisone; 410 void *copyto; 411 uint32_t *tick_tock; 412 int total_len; 413 int grabbed_lock = 0; 414 int value, newval, thisend, thisbegin; 415 416 /* 417 * Buffer layout. -sizeof this entry (total_len) -previous end 418 * (value) -ticks of log (ticks) o -ip packet o -as logged - 419 * where this started (thisbegin) x <--end points here 420 */ 421 total_len = SCTP_SIZE32((length + (4 * sizeof(int)))); 422 /* Log a packet to the buffer. */ 423 if (total_len > SCTP_PACKET_LOG_SIZE) { 424 /* Can't log this packet I have not a buffer big enough */ 425 return; 426 } 427 if (length < (int)(SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) { 428 return; 429 } 430 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), 1); 431try_again: 432 if (SCTP_BASE_VAR(packet_log_writers) > SCTP_PKTLOG_WRITERS_NEED_LOCK) { 433 SCTP_IP_PKTLOG_LOCK(); 434 grabbed_lock = 1; 435again_locked: 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 again_locked; 448 } 449 } else { 450 value = SCTP_BASE_VAR(packet_log_end); 451 newval = SCTP_BASE_VAR(packet_log_end) + total_len; 452 if (newval >= SCTP_PACKET_LOG_SIZE) { 453 /* we wrapped */ 454 thisbegin = 0; 455 thisend = total_len; 456 } else { 457 thisbegin = SCTP_BASE_VAR(packet_log_end); 458 thisend = newval; 459 } 460 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) { 461 goto try_again; 462 } 463 } 464 /* Sanity check */ 465 if (thisend >= SCTP_PACKET_LOG_SIZE) { 466 printf("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n", 467 thisbegin, 468 thisend, 469 SCTP_BASE_VAR(packet_log_writers), 470 grabbed_lock, 471 SCTP_BASE_VAR(packet_log_end)); 472 SCTP_BASE_VAR(packet_log_end) = 0; 473 goto no_log; 474 475 } 476 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisbegin]; 477 *lenat = total_len; 478 lenat++; 479 *lenat = value; 480 lenat++; 481 tick_tock = (uint32_t *) lenat; 482 lenat++; 483 *tick_tock = sctp_get_tick_count(); 484 copyto = (void *)lenat; 485 thisone = thisend - sizeof(int); 486 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisone]; 487 *lenat = thisbegin; 488 if (grabbed_lock) { 489 SCTP_IP_PKTLOG_UNLOCK(); 490 grabbed_lock = 0; 491 } 492 m_copydata(m, 0, length, (caddr_t)copyto); 493no_log: 494 if (grabbed_lock) { 495 SCTP_IP_PKTLOG_UNLOCK(); 496 } 497 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 1); 498} 499 500 501int 502sctp_copy_out_packet_log(uint8_t * target, int length) 503{ 504 /* 505 * We wind through the packet log starting at start copying up to 506 * length bytes out. We return the number of bytes copied. 507 */ 508 int tocopy, this_copy; 509 int *lenat; 510 int did_delay = 0; 511 512 tocopy = length; 513 if (length < (int)(2 * sizeof(int))) { 514 /* not enough room */ 515 return (0); 516 } 517 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) { 518 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), SCTP_PKTLOG_WRITERS_NEED_LOCK); 519again: 520 if ((did_delay == 0) && (SCTP_BASE_VAR(packet_log_writers) != SCTP_PKTLOG_WRITERS_NEED_LOCK)) { 521 /* 522 * we delay here for just a moment hoping the 523 * writer(s) that were present when we entered will 524 * have left and we only have locking ones that will 525 * contend with us for the lock. This does not 526 * assure 100% access, but its good enough for a 527 * logging facility like this. 528 */ 529 did_delay = 1; 530 DELAY(10); 531 goto again; 532 } 533 } 534 SCTP_IP_PKTLOG_LOCK(); 535 lenat = (int *)target; 536 *lenat = SCTP_BASE_VAR(packet_log_end); 537 lenat++; 538 this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE); 539 memcpy((void *)lenat, (void *)SCTP_BASE_VAR(packet_log_buffer), this_copy); 540 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) { 541 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 542 SCTP_PKTLOG_WRITERS_NEED_LOCK); 543 } 544 SCTP_IP_PKTLOG_UNLOCK(); 545 return (this_copy + sizeof(int)); 546} 547 548#endif 549