1 /*- 2 * Copyright (c) 2001 Brian Somers <brian@Awfulhak.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/param.h> 30 #include <netinet/in_systm.h> 31 #include <netinet/in.h> 32 #include <netinet/ip.h> 33 #include <sys/socket.h> 34 #include <net/route.h> 35 #include <net/if.h> 36 #include <net/if_types.h> 37 #include <net/if_dl.h> 38 #include <sys/un.h> 39 40 #include <stdarg.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <termios.h> 45 #include <ifaddrs.h> 46 47 #include "layer.h" 48 #include "defs.h" 49 #include "mbuf.h" 50 #include "timer.h" 51 #include "fsm.h" 52 #include "iplist.h" 53 #include "throughput.h" 54 #include "slcompress.h" 55 #include "lqr.h" 56 #include "hdlc.h" 57 #include "lcp.h" 58 #include "ncpaddr.h" 59 #include "ip.h" 60 #include "ipcp.h" 61 #include "ipv6cp.h" 62 #include "filter.h" 63 #include "descriptor.h" 64 #include "ccp.h" 65 #include "link.h" 66 #include "mp.h" 67 #ifndef NORADIUS 68 #include "radius.h" 69 #endif 70 #include "ncp.h" 71 #include "bundle.h" 72 #include "route.h" 73 #include "iface.h" 74 #include "log.h" 75 #include "proto.h" 76 #include "command.h" 77 #include "prompt.h" 78 #include "async.h" 79 #include "physical.h" 80 #include "probe.h" 81 #include "systems.h" 82 83 84 #ifndef NOINET6 85 #define IN6ADDR_LINKLOCAL_MCAST_INIT \ 86 {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 87 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}} 88 static const struct in6_addr in6addr_linklocal_mcast = 89 IN6ADDR_LINKLOCAL_MCAST_INIT; 90 91 static int ipv6cp_LayerUp(struct fsm *); 92 static void ipv6cp_LayerDown(struct fsm *); 93 static void ipv6cp_LayerStart(struct fsm *); 94 static void ipv6cp_LayerFinish(struct fsm *); 95 static void ipv6cp_InitRestartCounter(struct fsm *, int); 96 static void ipv6cp_SendConfigReq(struct fsm *); 97 static void ipv6cp_SentTerminateReq(struct fsm *); 98 static void ipv6cp_SendTerminateAck(struct fsm *, u_char); 99 static void ipv6cp_DecodeConfig(struct fsm *, u_char *, u_char *, int, 100 struct fsm_decode *); 101 102 static struct fsm_callbacks ipv6cp_Callbacks = { 103 ipv6cp_LayerUp, 104 ipv6cp_LayerDown, 105 ipv6cp_LayerStart, 106 ipv6cp_LayerFinish, 107 ipv6cp_InitRestartCounter, 108 ipv6cp_SendConfigReq, 109 ipv6cp_SentTerminateReq, 110 ipv6cp_SendTerminateAck, 111 ipv6cp_DecodeConfig, 112 fsm_NullRecvResetReq, 113 fsm_NullRecvResetAck 114 }; 115 116 static void 117 SetInterfaceID(u_char *ifid, int userandom) 118 { 119 struct ifaddrs *ifa, *ifap = NULL; 120 struct sockaddr_dl *sdl; 121 const u_long i32_max = 0xffffffff; 122 u_long r1, r2; 123 124 /* configure an interface ID based on Section 4.1 of RFC 2472 */ 125 memset(ifid, 0, IPV6CP_IFIDLEN); 126 127 /* 128 * 1) If an IEEE global identifier (EUI-48 or EUI-64) is 129 * available anywhere on the node, it should be used to construct 130 * the tentative Interface-Identifier due to its uniqueness 131 * properties. 132 */ 133 if (userandom) 134 goto randomid; 135 if (getifaddrs(&ifap) < 0) 136 goto randomid; 137 138 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 139 char *cp; 140 141 if (ifa->ifa_addr->sa_family != AF_LINK) 142 continue; 143 144 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 145 if (sdl->sdl_alen < 6) 146 continue; 147 /* we're only interested in IEEE hardware addresses */ 148 switch(sdl->sdl_type) { 149 case IFT_ETHER: 150 case IFT_FDDI: 151 /* XXX need more cases? */ 152 break; 153 default: 154 continue; 155 } 156 157 cp = (char *)(sdl->sdl_data + sdl->sdl_nlen); 158 ifid[0] = cp[0]; 159 ifid[0] ^= 0x02; /* reverse the u/l bit*/ 160 ifid[1] = cp[1]; 161 ifid[2] = cp[2]; 162 ifid[3] = 0xff; 163 ifid[4] = 0xfe; 164 ifid[5] = cp[3]; 165 ifid[6] = cp[4]; 166 ifid[7] = cp[5]; 167 168 freeifaddrs(ifap); 169 return; 170 } 171 172 freeifaddrs(ifap); 173 174 /* 175 * 2) If an IEEE global identifier is not available a different source 176 * of uniqueness should be used. 177 * XXX: we skip this case. 178 */ 179 180 /* 181 * 3) If a good source of uniqueness cannot be found, it is 182 * recommended that a random number be generated. In this case the 183 * "u" bit of the interface identifier MUST be set to zero (0). 184 */ 185 randomid: 186 randinit(); 187 r1 = (((u_long)random()) % i32_max) + 1; 188 r2 = (((u_long)random()) % i32_max) + 1; 189 memcpy(ifid, &r1, sizeof(r1)); 190 memcpy(ifid + 4, &r2, sizeof(r2)); 191 ifid[0] &= 0xfd; 192 return; 193 } 194 195 static int 196 ipcp_SetIPv6address(struct ipv6cp *ipv6cp, u_char *myifid, u_char *hisifid) 197 { 198 struct bundle *bundle = ipv6cp->fsm.bundle; 199 struct in6_addr myaddr, hisaddr; 200 struct ncprange myrange, range; 201 struct ncpaddr addr; 202 struct sockaddr_storage ssdst, ssgw, ssmask; 203 struct sockaddr *sadst, *sagw, *samask; 204 205 sadst = (struct sockaddr *)&ssdst; 206 sagw = (struct sockaddr *)&ssgw; 207 samask = (struct sockaddr *)&ssmask; 208 209 memset(&myaddr, '\0', sizeof myaddr); 210 memset(&hisaddr, '\0', sizeof hisaddr); 211 212 myaddr.s6_addr[0] = 0xfe; 213 myaddr.s6_addr[1] = 0x80; 214 memcpy(&myaddr.s6_addr[8], myifid, IPV6CP_IFIDLEN); 215 #if 0 216 myaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */ 217 #endif 218 219 hisaddr.s6_addr[0] = 0xfe; 220 hisaddr.s6_addr[1] = 0x80; 221 memcpy(&hisaddr.s6_addr[8], hisifid, IPV6CP_IFIDLEN); 222 #if 0 223 hisaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */ 224 #endif 225 226 ncpaddr_setip6(&ipv6cp->myaddr, &myaddr); 227 ncpaddr_setip6(&ipv6cp->hisaddr, &hisaddr); 228 ncprange_set(&myrange, &ipv6cp->myaddr, 64); 229 230 if (!iface_Add(bundle->iface, &bundle->ncp, &myrange, &ipv6cp->hisaddr, 231 IFACE_ADD_FIRST|IFACE_FORCE_ADD|IFACE_SYSTEM)) 232 return 0; 233 234 if (!Enabled(bundle, OPT_IFACEALIAS)) 235 iface_Clear(bundle->iface, &bundle->ncp, AF_INET6, 236 IFACE_CLEAR_ALIASES|IFACE_SYSTEM); 237 238 ncpaddr_setip6(&addr, &in6addr_linklocal_mcast); 239 ncprange_set(&range, &addr, 32); 240 rt_Set(bundle, RTM_ADD, &range, &ipv6cp->myaddr, 1, 0); 241 242 if (bundle->ncp.cfg.sendpipe > 0 || bundle->ncp.cfg.recvpipe > 0) { 243 ncprange_getsa(&myrange, &ssgw, &ssmask); 244 if (ncpaddr_isset(&ipv6cp->hisaddr)) 245 ncpaddr_getsa(&ipv6cp->hisaddr, &ssdst); 246 else 247 sadst = NULL; 248 rt_Update(bundle, sadst, sagw, samask); 249 } 250 251 if (Enabled(bundle, OPT_SROUTES)) 252 route_Change(bundle, bundle->ncp.route, &ipv6cp->myaddr, &ipv6cp->hisaddr); 253 254 #ifndef NORADIUS 255 if (bundle->radius.valid) 256 route_Change(bundle, bundle->radius.ipv6routes, &ipv6cp->myaddr, 257 &ipv6cp->hisaddr); 258 #endif 259 260 return 1; /* Ok */ 261 } 262 263 void 264 ipv6cp_Init(struct ipv6cp *ipv6cp, struct bundle *bundle, struct link *l, 265 const struct fsm_parent *parent) 266 { 267 static const char * const timer_names[] = 268 {"IPV6CP restart", "IPV6CP openmode", "IPV6CP stopped"}; 269 int n; 270 271 fsm_Init(&ipv6cp->fsm, "IPV6CP", PROTO_IPV6CP, 1, IPV6CP_MAXCODE, LogIPV6CP, 272 bundle, l, parent, &ipv6cp_Callbacks, timer_names); 273 274 ipv6cp->cfg.fsm.timeout = DEF_FSMRETRY; 275 ipv6cp->cfg.fsm.maxreq = DEF_FSMTRIES; 276 ipv6cp->cfg.fsm.maxtrm = DEF_FSMTRIES; 277 278 SetInterfaceID(ipv6cp->my_ifid, 0); 279 do { 280 SetInterfaceID(ipv6cp->his_ifid, 1); 281 } while (memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0); 282 283 if (probe.ipv6_available) { 284 n = 100; 285 while (n && 286 !ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) { 287 do { 288 n--; 289 SetInterfaceID(ipv6cp->my_ifid, 1); 290 } while (n 291 && memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0); 292 } 293 } 294 295 throughput_init(&ipv6cp->throughput, SAMPLE_PERIOD); 296 memset(ipv6cp->Queue, '\0', sizeof ipv6cp->Queue); 297 ipv6cp_Setup(ipv6cp); 298 } 299 300 void 301 ipv6cp_Destroy(struct ipv6cp *ipv6cp) 302 { 303 throughput_destroy(&ipv6cp->throughput); 304 } 305 306 void 307 ipv6cp_Setup(struct ipv6cp *ipv6cp) 308 { 309 ncpaddr_init(&ipv6cp->myaddr); 310 ncpaddr_init(&ipv6cp->hisaddr); 311 312 ipv6cp->his_reject = 0; 313 ipv6cp->my_reject = 0; 314 } 315 316 void 317 ipv6cp_SetLink(struct ipv6cp *ipv6cp, struct link *l) 318 { 319 ipv6cp->fsm.link = l; 320 } 321 322 int 323 ipv6cp_Show(struct cmdargs const *arg) 324 { 325 struct ipv6cp *ipv6cp = &arg->bundle->ncp.ipv6cp; 326 327 prompt_Printf(arg->prompt, "%s [%s]\n", ipv6cp->fsm.name, 328 State2Nam(ipv6cp->fsm.state)); 329 if (ipv6cp->fsm.state == ST_OPENED) { 330 prompt_Printf(arg->prompt, " His side: %s\n", 331 ncpaddr_ntoa(&ipv6cp->hisaddr)); 332 prompt_Printf(arg->prompt, " My side: %s\n", 333 ncpaddr_ntoa(&ipv6cp->myaddr)); 334 prompt_Printf(arg->prompt, " Queued packets: %lu\n", 335 (unsigned long)ipv6cp_QueueLen(ipv6cp)); 336 } 337 338 prompt_Printf(arg->prompt, "\nDefaults:\n"); 339 prompt_Printf(arg->prompt, " FSM retry = %us, max %u Config" 340 " REQ%s, %u Term REQ%s\n\n", ipv6cp->cfg.fsm.timeout, 341 ipv6cp->cfg.fsm.maxreq, ipv6cp->cfg.fsm.maxreq == 1 ? "" : "s", 342 ipv6cp->cfg.fsm.maxtrm, ipv6cp->cfg.fsm.maxtrm == 1 ? "" : "s"); 343 344 throughput_disp(&ipv6cp->throughput, arg->prompt); 345 346 return 0; 347 } 348 349 struct mbuf * 350 ipv6cp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp) 351 { 352 /* Got PROTO_IPV6CP from link */ 353 m_settype(bp, MB_IPV6CPIN); 354 if (bundle_Phase(bundle) == PHASE_NETWORK) 355 fsm_Input(&bundle->ncp.ipv6cp.fsm, bp); 356 else { 357 if (bundle_Phase(bundle) < PHASE_NETWORK) 358 log_Printf(LogIPV6CP, "%s: Error: Unexpected IPV6CP in phase %s" 359 " (ignored)\n", l->name, bundle_PhaseName(bundle)); 360 m_freem(bp); 361 } 362 return NULL; 363 } 364 365 void 366 ipv6cp_AddInOctets(struct ipv6cp *ipv6cp, int n) 367 { 368 throughput_addin(&ipv6cp->throughput, n); 369 } 370 371 void 372 ipv6cp_AddOutOctets(struct ipv6cp *ipv6cp, int n) 373 { 374 throughput_addout(&ipv6cp->throughput, n); 375 } 376 377 void 378 ipv6cp_IfaceAddrAdded(struct ipv6cp *ipv6cp __unused, 379 const struct iface_addr *addr __unused) 380 { 381 } 382 383 void 384 ipv6cp_IfaceAddrDeleted(struct ipv6cp *ipv6cp __unused, 385 const struct iface_addr *addr __unused) 386 { 387 } 388 389 int 390 ipv6cp_InterfaceUp(struct ipv6cp *ipv6cp) 391 { 392 if (!ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) { 393 log_Printf(LogERROR, "ipv6cp_InterfaceUp: unable to set ipv6 address\n"); 394 return 0; 395 } 396 397 if (!iface_SetFlags(ipv6cp->fsm.bundle->iface->name, IFF_UP)) { 398 log_Printf(LogERROR, "ipv6cp_InterfaceUp: Can't set the IFF_UP" 399 " flag on %s\n", ipv6cp->fsm.bundle->iface->name); 400 return 0; 401 } 402 403 return 1; 404 } 405 406 size_t 407 ipv6cp_QueueLen(struct ipv6cp *ipv6cp) 408 { 409 struct mqueue *q; 410 size_t result; 411 412 result = 0; 413 for (q = ipv6cp->Queue; q < ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp); q++) 414 result += q->len; 415 416 return result; 417 } 418 419 int 420 ipv6cp_PushPacket(struct ipv6cp *ipv6cp, struct link *l) 421 { 422 struct bundle *bundle = ipv6cp->fsm.bundle; 423 struct mqueue *queue; 424 struct mbuf *bp; 425 int m_len; 426 u_int32_t secs = 0; 427 unsigned alivesecs = 0; 428 429 if (ipv6cp->fsm.state != ST_OPENED) 430 return 0; 431 432 /* 433 * If ccp is not open but is required, do nothing. 434 */ 435 if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) { 436 log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name); 437 return 0; 438 } 439 440 queue = ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp) - 1; 441 do { 442 if (queue->top) { 443 bp = m_dequeue(queue); 444 bp = mbuf_Read(bp, &secs, sizeof secs); 445 bp = m_pullup(bp); 446 m_len = m_length(bp); 447 if (!FilterCheck(MBUF_CTOP(bp), AF_INET6, &bundle->filter.alive, 448 &alivesecs)) { 449 if (secs == 0) 450 secs = alivesecs; 451 bundle_StartIdleTimer(bundle, secs); 452 } 453 link_PushPacket(l, bp, bundle, 0, PROTO_IPV6); 454 ipv6cp_AddOutOctets(ipv6cp, m_len); 455 return 1; 456 } 457 } while (queue-- != ipv6cp->Queue); 458 459 return 0; 460 } 461 462 static int 463 ipv6cp_LayerUp(struct fsm *fp) 464 { 465 /* We're now up */ 466 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 467 char tbuff[40]; 468 469 log_Printf(LogIPV6CP, "%s: LayerUp.\n", fp->link->name); 470 if (!ipv6cp_InterfaceUp(ipv6cp)) 471 return 0; 472 473 snprintf(tbuff, sizeof tbuff, "%s", ncpaddr_ntoa(&ipv6cp->myaddr)); 474 log_Printf(LogIPV6CP, "myaddr %s hisaddr = %s\n", 475 tbuff, ncpaddr_ntoa(&ipv6cp->hisaddr)); 476 477 #ifndef NORADIUS 478 radius_Account_Set_Ipv6(&fp->bundle->radacct6, ipv6cp->his_ifid); 479 radius_Account(&fp->bundle->radius, &fp->bundle->radacct6, 480 fp->bundle->links, RAD_START, &ipv6cp->throughput); 481 482 /* 483 * XXX: Avoid duplicate evaluation of filterid between IPCP and 484 * IPV6CP. When IPCP is enabled and rejected, filterid is not 485 * evaluated. 486 */ 487 if (!Enabled(fp->bundle, OPT_IPCP)) { 488 if (fp->bundle->radius.cfg.file && fp->bundle->radius.filterid) 489 system_Select(fp->bundle, fp->bundle->radius.filterid, LINKUPFILE, 490 NULL, NULL); 491 } 492 #endif 493 494 /* 495 * XXX this stuff should really live in the FSM. Our config should 496 * associate executable sections in files with events. 497 */ 498 if (system_Select(fp->bundle, tbuff, LINKUPFILE, NULL, NULL) < 0) { 499 /* 500 * XXX: Avoid duplicate evaluation of label between IPCP and 501 * IPV6CP. When IPCP is enabled and rejected, label is not 502 * evaluated. 503 */ 504 if (bundle_GetLabel(fp->bundle) && !Enabled(fp->bundle, OPT_IPCP)) { 505 if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle), 506 LINKUPFILE, NULL, NULL) < 0) 507 system_Select(fp->bundle, "MYADDR6", LINKUPFILE, NULL, NULL); 508 } else 509 system_Select(fp->bundle, "MYADDR6", LINKUPFILE, NULL, NULL); 510 } 511 512 fp->more.reqs = fp->more.naks = fp->more.rejs = ipv6cp->cfg.fsm.maxreq * 3; 513 log_DisplayPrompts(); 514 515 return 1; 516 } 517 518 static void 519 ipv6cp_LayerDown(struct fsm *fp) 520 { 521 /* About to come down */ 522 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 523 static int recursing; 524 char addr[40]; 525 526 if (!recursing++) { 527 snprintf(addr, sizeof addr, "%s", ncpaddr_ntoa(&ipv6cp->myaddr)); 528 log_Printf(LogIPV6CP, "%s: LayerDown: %s\n", fp->link->name, addr); 529 530 #ifndef NORADIUS 531 radius_Flush(&fp->bundle->radius); 532 radius_Account(&fp->bundle->radius, &fp->bundle->radacct6, 533 fp->bundle->links, RAD_STOP, &ipv6cp->throughput); 534 535 /* 536 * XXX: Avoid duplicate evaluation of filterid between IPCP and 537 * IPV6CP. When IPCP is enabled and rejected, filterid is not 538 * evaluated. 539 */ 540 if (!Enabled(fp->bundle, OPT_IPCP)) { 541 if (fp->bundle->radius.cfg.file && fp->bundle->radius.filterid) 542 system_Select(fp->bundle, fp->bundle->radius.filterid, LINKDOWNFILE, 543 NULL, NULL); 544 } 545 #endif 546 547 /* 548 * XXX this stuff should really live in the FSM. Our config should 549 * associate executable sections in files with events. 550 */ 551 if (system_Select(fp->bundle, addr, LINKDOWNFILE, NULL, NULL) < 0) { 552 /* 553 * XXX: Avoid duplicate evaluation of label between IPCP and 554 * IPV6CP. When IPCP is enabled and rejected, label is not 555 * evaluated. 556 */ 557 if (bundle_GetLabel(fp->bundle) && !Enabled(fp->bundle, OPT_IPCP)) { 558 if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle), 559 LINKDOWNFILE, NULL, NULL) < 0) 560 system_Select(fp->bundle, "MYADDR6", LINKDOWNFILE, NULL, NULL); 561 } else 562 system_Select(fp->bundle, "MYADDR6", LINKDOWNFILE, NULL, NULL); 563 } 564 565 ipv6cp_Setup(ipv6cp); 566 } 567 recursing--; 568 } 569 570 static void 571 ipv6cp_LayerStart(struct fsm *fp) 572 { 573 /* We're about to start up ! */ 574 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 575 576 log_Printf(LogIPV6CP, "%s: LayerStart.\n", fp->link->name); 577 throughput_start(&ipv6cp->throughput, "IPV6CP throughput", 578 Enabled(fp->bundle, OPT_THROUGHPUT)); 579 fp->more.reqs = fp->more.naks = fp->more.rejs = ipv6cp->cfg.fsm.maxreq * 3; 580 ipv6cp->peer_tokenreq = 0; 581 } 582 583 static void 584 ipv6cp_LayerFinish(struct fsm *fp) 585 { 586 /* We're now down */ 587 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 588 589 log_Printf(LogIPV6CP, "%s: LayerFinish.\n", fp->link->name); 590 throughput_stop(&ipv6cp->throughput); 591 throughput_log(&ipv6cp->throughput, LogIPV6CP, NULL); 592 } 593 594 static void 595 ipv6cp_InitRestartCounter(struct fsm *fp, int what) 596 { 597 /* Set fsm timer load */ 598 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 599 600 fp->FsmTimer.load = ipv6cp->cfg.fsm.timeout * SECTICKS; 601 switch (what) { 602 case FSM_REQ_TIMER: 603 fp->restart = ipv6cp->cfg.fsm.maxreq; 604 break; 605 case FSM_TRM_TIMER: 606 fp->restart = ipv6cp->cfg.fsm.maxtrm; 607 break; 608 default: 609 fp->restart = 1; 610 break; 611 } 612 } 613 614 static void 615 ipv6cp_SendConfigReq(struct fsm *fp) 616 { 617 /* Send config REQ please */ 618 struct physical *p = link2physical(fp->link); 619 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 620 u_char buff[IPV6CP_IFIDLEN+2]; 621 struct fsm_opt *o; 622 623 o = (struct fsm_opt *)buff; 624 625 if ((p && !physical_IsSync(p)) || !REJECTED(ipv6cp, TY_TOKEN)) { 626 memcpy(o->data, ipv6cp->my_ifid, IPV6CP_IFIDLEN); 627 INC_FSM_OPT(TY_TOKEN, IPV6CP_IFIDLEN + 2, o); 628 } 629 630 fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff, 631 MB_IPV6CPOUT); 632 } 633 634 static void 635 ipv6cp_SentTerminateReq(struct fsm *fp __unused) 636 { 637 /* Term REQ just sent by FSM */ 638 } 639 640 static void 641 ipv6cp_SendTerminateAck(struct fsm *fp, u_char id) 642 { 643 /* Send Term ACK please */ 644 fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_IPV6CPOUT); 645 } 646 647 static const char * 648 protoname(unsigned proto) 649 { 650 static const char *cftypes[] = { "IFACEID", "COMPPROTO" }; 651 652 if (proto > 0 && proto <= sizeof cftypes / sizeof *cftypes) 653 return cftypes[proto - 1]; 654 655 return NumStr(proto, NULL, 0); 656 } 657 658 static void 659 ipv6cp_ValidateInterfaceID(struct ipv6cp *ipv6cp, u_char *ifid, 660 struct fsm_decode *dec) 661 { 662 struct fsm_opt opt; 663 u_char zero[IPV6CP_IFIDLEN]; 664 665 memset(zero, 0, IPV6CP_IFIDLEN); 666 667 if (memcmp(ifid, zero, IPV6CP_IFIDLEN) != 0 668 && memcmp(ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) != 0) 669 memcpy(ipv6cp->his_ifid, ifid, IPV6CP_IFIDLEN); 670 671 opt.hdr.id = TY_TOKEN; 672 opt.hdr.len = IPV6CP_IFIDLEN + 2; 673 memcpy(opt.data, &ipv6cp->his_ifid, IPV6CP_IFIDLEN); 674 if (memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0) 675 fsm_ack(dec, &opt); 676 else 677 fsm_nak(dec, &opt); 678 } 679 680 static void 681 ipv6cp_DecodeConfig(struct fsm *fp, u_char *cp, u_char *end, int mode_type, 682 struct fsm_decode *dec) 683 { 684 /* Deal with incoming PROTO_IPV6CP */ 685 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 686 int n; 687 char tbuff[100]; 688 u_char ifid[IPV6CP_IFIDLEN], zero[IPV6CP_IFIDLEN]; 689 struct fsm_opt *opt; 690 691 memset(zero, 0, IPV6CP_IFIDLEN); 692 693 while (end - cp >= (int)sizeof(opt->hdr)) { 694 if ((opt = fsm_readopt(&cp)) == NULL) 695 break; 696 697 snprintf(tbuff, sizeof tbuff, " %s[%d]", protoname(opt->hdr.id), 698 opt->hdr.len); 699 700 switch (opt->hdr.id) { 701 case TY_TOKEN: 702 memcpy(ifid, opt->data, IPV6CP_IFIDLEN); 703 log_Printf(LogIPV6CP, "%s 0x%02x%02x%02x%02x%02x%02x%02x%02x\n", tbuff, 704 ifid[0], ifid[1], ifid[2], ifid[3], ifid[4], ifid[5], ifid[6], ifid[7]); 705 706 switch (mode_type) { 707 case MODE_REQ: 708 ipv6cp->peer_tokenreq = 1; 709 ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec); 710 break; 711 712 case MODE_NAK: 713 if (memcmp(ifid, zero, IPV6CP_IFIDLEN) == 0) { 714 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, 715 "0x0000000000000000: Unacceptable IntefaceID!\n"); 716 fsm_Close(&ipv6cp->fsm); 717 } else if (memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0) { 718 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, 719 "0x%02x%02x%02x%02x%02x%02x%02x%02x: " 720 "Unacceptable IntefaceID!\n", 721 ifid[0], ifid[1], ifid[2], ifid[3], 722 ifid[4], ifid[5], ifid[6], ifid[7]); 723 } else if (memcmp(ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) != 0) { 724 n = 100; 725 while (n && !ipcp_SetIPv6address(ipv6cp, ifid, ipv6cp->his_ifid)) { 726 do { 727 n--; 728 SetInterfaceID(ifid, 1); 729 } while (n && memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0); 730 } 731 732 if (n == 0) { 733 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, 734 "0x0000000000000000: Unacceptable IntefaceID!\n"); 735 fsm_Close(&ipv6cp->fsm); 736 } else { 737 log_Printf(LogIPV6CP, "%s changing IntefaceID: " 738 "0x%02x%02x%02x%02x%02x%02x%02x%02x " 739 "--> 0x%02x%02x%02x%02x%02x%02x%02x%02x\n", tbuff, 740 ipv6cp->my_ifid[0], ipv6cp->my_ifid[1], 741 ipv6cp->my_ifid[2], ipv6cp->my_ifid[3], 742 ipv6cp->my_ifid[4], ipv6cp->my_ifid[5], 743 ipv6cp->my_ifid[6], ipv6cp->my_ifid[7], 744 ifid[0], ifid[1], ifid[2], ifid[3], 745 ifid[4], ifid[5], ifid[6], ifid[7]); 746 memcpy(ipv6cp->my_ifid, ifid, IPV6CP_IFIDLEN); 747 bundle_AdjustFilters(fp->bundle, &ipv6cp->myaddr, NULL); 748 } 749 } 750 break; 751 752 case MODE_REJ: 753 ipv6cp->his_reject |= (1 << opt->hdr.id); 754 break; 755 } 756 break; 757 758 default: 759 if (mode_type != MODE_NOP) { 760 ipv6cp->my_reject |= (1 << opt->hdr.id); 761 fsm_rej(dec, opt); 762 } 763 break; 764 } 765 } 766 767 if (mode_type != MODE_NOP) { 768 if (mode_type == MODE_REQ && !ipv6cp->peer_tokenreq) { 769 if (dec->rejend == dec->rej && dec->nakend == dec->nak) { 770 /* 771 * Pretend the peer has requested a TOKEN. 772 * We do this to ensure that we only send one NAK if the only 773 * reason for the NAK is because the peer isn't sending a 774 * TY_TOKEN REQ. This stops us from repeatedly trying to tell 775 * the peer that we have to have an IP address on their end. 776 */ 777 ipv6cp->peer_tokenreq = 1; 778 } 779 memset(ifid, 0, IPV6CP_IFIDLEN); 780 ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec); 781 } 782 fsm_opt_normalise(dec); 783 } 784 } 785 #endif 786