1 /*- 2 * Copyright (c) 2001 Brian Somers <brian (at) 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: src/usr.sbin/ppp/ipv6cp.c,v 1.17.10.1.2.1 2010/12/21 17:10:29 kensmith Exp $ 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 case IFT_L2VLAN: 152 /* XXX need more cases? */ 153 break; 154 default: 155 continue; 156 } 157 158 cp = (char *)(sdl->sdl_data + sdl->sdl_nlen); 159 ifid[0] = cp[0]; 160 ifid[0] ^= 0x02; /* reverse the u/l bit*/ 161 ifid[1] = cp[1]; 162 ifid[2] = cp[2]; 163 ifid[3] = 0xff; 164 ifid[4] = 0xfe; 165 ifid[5] = cp[3]; 166 ifid[6] = cp[4]; 167 ifid[7] = cp[5]; 168 169 freeifaddrs(ifap); 170 return; 171 } 172 173 freeifaddrs(ifap); 174 175 /* 176 * 2) If an IEEE global identifier is not available a different source 177 * of uniqueness should be used. 178 * XXX: we skip this case. 179 */ 180 181 /* 182 * 3) If a good source of uniqueness cannot be found, it is 183 * recommended that a random number be generated. In this case the 184 * "u" bit of the interface identifier MUST be set to zero (0). 185 */ 186 randomid: 187 randinit(); 188 r1 = (((u_long)random()) % i32_max) + 1; 189 r2 = (((u_long)random()) % i32_max) + 1; 190 memcpy(ifid, &r1, sizeof(r1)); 191 memcpy(ifid + 4, &r2, sizeof(r2)); 192 ifid[0] &= 0xfd; 193 return; 194 } 195 196 static int 197 ipcp_SetIPv6address(struct ipv6cp *ipv6cp, u_char *myifid, u_char *hisifid) 198 { 199 struct bundle *bundle = ipv6cp->fsm.bundle; 200 struct in6_addr myaddr, hisaddr; 201 struct ncprange myrange, range; 202 struct ncpaddr addr; 203 struct sockaddr_storage ssdst, ssgw, ssmask; 204 struct sockaddr *sadst, *sagw, *samask; 205 206 sadst = (struct sockaddr *)&ssdst; 207 sagw = (struct sockaddr *)&ssgw; 208 samask = (struct sockaddr *)&ssmask; 209 210 memset(&myaddr, '\0', sizeof myaddr); 211 memset(&hisaddr, '\0', sizeof hisaddr); 212 213 myaddr.s6_addr[0] = 0xfe; 214 myaddr.s6_addr[1] = 0x80; 215 memcpy(&myaddr.s6_addr[8], myifid, IPV6CP_IFIDLEN); 216 #if 0 217 myaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */ 218 #endif 219 220 hisaddr.s6_addr[0] = 0xfe; 221 hisaddr.s6_addr[1] = 0x80; 222 memcpy(&hisaddr.s6_addr[8], hisifid, IPV6CP_IFIDLEN); 223 #if 0 224 hisaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */ 225 #endif 226 227 ncpaddr_setip6(&ipv6cp->myaddr, &myaddr); 228 ncpaddr_setip6(&ipv6cp->hisaddr, &hisaddr); 229 ncprange_set(&myrange, &ipv6cp->myaddr, 64); 230 231 if (!iface_Add(bundle->iface, &bundle->ncp, &myrange, &ipv6cp->hisaddr, 232 IFACE_ADD_FIRST|IFACE_FORCE_ADD|IFACE_SYSTEM)) 233 return 0; 234 235 if (!Enabled(bundle, OPT_IFACEALIAS)) 236 iface_Clear(bundle->iface, &bundle->ncp, AF_INET6, 237 IFACE_CLEAR_ALIASES|IFACE_SYSTEM); 238 239 ncpaddr_setip6(&addr, &in6addr_linklocal_mcast); 240 ncprange_set(&range, &addr, 32); 241 rt_Set(bundle, RTM_ADD, &range, &ipv6cp->myaddr, 1, 0); 242 243 if (bundle->ncp.cfg.sendpipe > 0 || bundle->ncp.cfg.recvpipe > 0) { 244 ncprange_getsa(&myrange, &ssgw, &ssmask); 245 if (ncpaddr_isset(&ipv6cp->hisaddr)) 246 ncpaddr_getsa(&ipv6cp->hisaddr, &ssdst); 247 else 248 sadst = NULL; 249 rt_Update(bundle, sadst, sagw, samask); 250 } 251 252 if (Enabled(bundle, OPT_SROUTES)) 253 route_Change(bundle, bundle->ncp.route, &ipv6cp->myaddr, &ipv6cp->hisaddr); 254 255 #ifndef NORADIUS 256 if (bundle->radius.valid) 257 route_Change(bundle, bundle->radius.ipv6routes, &ipv6cp->myaddr, 258 &ipv6cp->hisaddr); 259 #endif 260 261 return 1; /* Ok */ 262 } 263 264 void 265 ipv6cp_Init(struct ipv6cp *ipv6cp, struct bundle *bundle, struct link *l, 266 const struct fsm_parent *parent) 267 { 268 static const char * const timer_names[] = 269 {"IPV6CP restart", "IPV6CP openmode", "IPV6CP stopped"}; 270 int n; 271 272 fsm_Init(&ipv6cp->fsm, "IPV6CP", PROTO_IPV6CP, 1, IPV6CP_MAXCODE, LogIPV6CP, 273 bundle, l, parent, &ipv6cp_Callbacks, timer_names); 274 275 ipv6cp->cfg.fsm.timeout = DEF_FSMRETRY; 276 ipv6cp->cfg.fsm.maxreq = DEF_FSMTRIES; 277 ipv6cp->cfg.fsm.maxtrm = DEF_FSMTRIES; 278 279 SetInterfaceID(ipv6cp->my_ifid, 0); 280 do { 281 SetInterfaceID(ipv6cp->his_ifid, 1); 282 } while (memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0); 283 284 if (probe.ipv6_available) { 285 n = 100; 286 while (n && 287 !ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) { 288 do { 289 n--; 290 SetInterfaceID(ipv6cp->my_ifid, 1); 291 } while (n 292 && memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0); 293 } 294 } 295 296 throughput_init(&ipv6cp->throughput, SAMPLE_PERIOD); 297 memset(ipv6cp->Queue, '\0', sizeof ipv6cp->Queue); 298 ipv6cp_Setup(ipv6cp); 299 } 300 301 void 302 ipv6cp_Destroy(struct ipv6cp *ipv6cp) 303 { 304 throughput_destroy(&ipv6cp->throughput); 305 } 306 307 void 308 ipv6cp_Setup(struct ipv6cp *ipv6cp) 309 { 310 ncpaddr_init(&ipv6cp->myaddr); 311 ncpaddr_init(&ipv6cp->hisaddr); 312 313 ipv6cp->his_reject = 0; 314 ipv6cp->my_reject = 0; 315 } 316 317 void 318 ipv6cp_SetLink(struct ipv6cp *ipv6cp, struct link *l) 319 { 320 ipv6cp->fsm.link = l; 321 } 322 323 int 324 ipv6cp_Show(struct cmdargs const *arg) 325 { 326 struct ipv6cp *ipv6cp = &arg->bundle->ncp.ipv6cp; 327 328 prompt_Printf(arg->prompt, "%s [%s]\n", ipv6cp->fsm.name, 329 State2Nam(ipv6cp->fsm.state)); 330 if (ipv6cp->fsm.state == ST_OPENED) { 331 prompt_Printf(arg->prompt, " His side: %s\n", 332 ncpaddr_ntoa(&ipv6cp->hisaddr)); 333 prompt_Printf(arg->prompt, " My side: %s\n", 334 ncpaddr_ntoa(&ipv6cp->myaddr)); 335 prompt_Printf(arg->prompt, " Queued packets: %lu\n", 336 (unsigned long)ipv6cp_QueueLen(ipv6cp)); 337 } 338 339 prompt_Printf(arg->prompt, "\nDefaults:\n"); 340 prompt_Printf(arg->prompt, " FSM retry = %us, max %u Config" 341 " REQ%s, %u Term REQ%s\n\n", ipv6cp->cfg.fsm.timeout, 342 ipv6cp->cfg.fsm.maxreq, ipv6cp->cfg.fsm.maxreq == 1 ? "" : "s", 343 ipv6cp->cfg.fsm.maxtrm, ipv6cp->cfg.fsm.maxtrm == 1 ? "" : "s"); 344 345 throughput_disp(&ipv6cp->throughput, arg->prompt); 346 347 return 0; 348 } 349 350 struct mbuf * 351 ipv6cp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp) 352 { 353 /* Got PROTO_IPV6CP from link */ 354 m_settype(bp, MB_IPV6CPIN); 355 if (bundle_Phase(bundle) == PHASE_NETWORK) 356 fsm_Input(&bundle->ncp.ipv6cp.fsm, bp); 357 else { 358 if (bundle_Phase(bundle) < PHASE_NETWORK) 359 log_Printf(LogIPV6CP, "%s: Error: Unexpected IPV6CP in phase %s" 360 " (ignored)\n", l->name, bundle_PhaseName(bundle)); 361 m_freem(bp); 362 } 363 return NULL; 364 } 365 366 void 367 ipv6cp_AddInOctets(struct ipv6cp *ipv6cp, int n) 368 { 369 throughput_addin(&ipv6cp->throughput, n); 370 } 371 372 void 373 ipv6cp_AddOutOctets(struct ipv6cp *ipv6cp, int n) 374 { 375 throughput_addout(&ipv6cp->throughput, n); 376 } 377 378 void 379 ipv6cp_IfaceAddrAdded(struct ipv6cp *ipv6cp __unused, 380 const struct iface_addr *addr __unused) 381 { 382 } 383 384 void 385 ipv6cp_IfaceAddrDeleted(struct ipv6cp *ipv6cp __unused, 386 const struct iface_addr *addr __unused) 387 { 388 } 389 390 int 391 ipv6cp_InterfaceUp(struct ipv6cp *ipv6cp) 392 { 393 if (!ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) { 394 log_Printf(LogERROR, "ipv6cp_InterfaceUp: unable to set ipv6 address\n"); 395 return 0; 396 } 397 398 if (!iface_SetFlags(ipv6cp->fsm.bundle->iface->name, IFF_UP)) { 399 log_Printf(LogERROR, "ipv6cp_InterfaceUp: Can't set the IFF_UP" 400 " flag on %s\n", ipv6cp->fsm.bundle->iface->name); 401 return 0; 402 } 403 404 return 1; 405 } 406 407 size_t 408 ipv6cp_QueueLen(struct ipv6cp *ipv6cp) 409 { 410 struct mqueue *q; 411 size_t result; 412 413 result = 0; 414 for (q = ipv6cp->Queue; q < ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp); q++) 415 result += q->len; 416 417 return result; 418 } 419 420 int 421 ipv6cp_PushPacket(struct ipv6cp *ipv6cp, struct link *l) 422 { 423 struct bundle *bundle = ipv6cp->fsm.bundle; 424 struct mqueue *queue; 425 struct mbuf *bp; 426 int m_len; 427 u_int32_t secs = 0; 428 unsigned alivesecs = 0; 429 430 if (ipv6cp->fsm.state != ST_OPENED) 431 return 0; 432 433 /* 434 * If ccp is not open but is required, do nothing. 435 */ 436 if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) { 437 log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name); 438 return 0; 439 } 440 441 queue = ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp) - 1; 442 do { 443 if (queue->top) { 444 bp = m_dequeue(queue); 445 bp = mbuf_Read(bp, &secs, sizeof secs); 446 bp = m_pullup(bp); 447 m_len = m_length(bp); 448 if (!FilterCheck(MBUF_CTOP(bp), AF_INET6, &bundle->filter.alive, 449 &alivesecs)) { 450 if (secs == 0) 451 secs = alivesecs; 452 bundle_StartIdleTimer(bundle, secs); 453 } 454 link_PushPacket(l, bp, bundle, 0, PROTO_IPV6); 455 ipv6cp_AddOutOctets(ipv6cp, m_len); 456 return 1; 457 } 458 } while (queue-- != ipv6cp->Queue); 459 460 return 0; 461 } 462 463 static int 464 ipv6cp_LayerUp(struct fsm *fp) 465 { 466 /* We're now up */ 467 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 468 char tbuff[40]; 469 470 log_Printf(LogIPV6CP, "%s: LayerUp.\n", fp->link->name); 471 if (!ipv6cp_InterfaceUp(ipv6cp)) 472 return 0; 473 474 snprintf(tbuff, sizeof tbuff, "%s", ncpaddr_ntoa(&ipv6cp->myaddr)); 475 log_Printf(LogIPV6CP, "myaddr %s hisaddr = %s\n", 476 tbuff, ncpaddr_ntoa(&ipv6cp->hisaddr)); 477 478 #ifndef NORADIUS 479 radius_Account_Set_Ipv6(&fp->bundle->radacct6, ipv6cp->his_ifid); 480 radius_Account(&fp->bundle->radius, &fp->bundle->radacct6, 481 fp->bundle->links, RAD_START, &ipv6cp->throughput); 482 483 /* 484 * XXX: Avoid duplicate evaluation of filterid between IPCP and 485 * IPV6CP. When IPCP is enabled and rejected, filterid is not 486 * evaluated. 487 */ 488 if (!Enabled(fp->bundle, OPT_IPCP)) { 489 if (fp->bundle->radius.cfg.file && fp->bundle->radius.filterid) 490 system_Select(fp->bundle, fp->bundle->radius.filterid, LINKUPFILE, 491 NULL, NULL); 492 } 493 #endif 494 495 /* 496 * XXX this stuff should really live in the FSM. Our config should 497 * associate executable sections in files with events. 498 */ 499 if (system_Select(fp->bundle, tbuff, LINKUPFILE, NULL, NULL) < 0) { 500 /* 501 * XXX: Avoid duplicate evaluation of label between IPCP and 502 * IPV6CP. When IPCP is enabled and rejected, label is not 503 * evaluated. 504 */ 505 if (bundle_GetLabel(fp->bundle) && !Enabled(fp->bundle, OPT_IPCP)) { 506 if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle), 507 LINKUPFILE, NULL, NULL) < 0) 508 system_Select(fp->bundle, "MYADDR6", LINKUPFILE, NULL, NULL); 509 } else 510 system_Select(fp->bundle, "MYADDR6", LINKUPFILE, NULL, NULL); 511 } 512 513 fp->more.reqs = fp->more.naks = fp->more.rejs = ipv6cp->cfg.fsm.maxreq * 3; 514 log_DisplayPrompts(); 515 516 return 1; 517 } 518 519 static void 520 ipv6cp_LayerDown(struct fsm *fp) 521 { 522 /* About to come down */ 523 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 524 static int recursing; 525 char addr[40]; 526 527 if (!recursing++) { 528 snprintf(addr, sizeof addr, "%s", ncpaddr_ntoa(&ipv6cp->myaddr)); 529 log_Printf(LogIPV6CP, "%s: LayerDown: %s\n", fp->link->name, addr); 530 531 #ifndef NORADIUS 532 radius_Flush(&fp->bundle->radius); 533 radius_Account(&fp->bundle->radius, &fp->bundle->radacct6, 534 fp->bundle->links, RAD_STOP, &ipv6cp->throughput); 535 536 /* 537 * XXX: Avoid duplicate evaluation of filterid between IPCP and 538 * IPV6CP. When IPCP is enabled and rejected, filterid is not 539 * evaluated. 540 */ 541 if (!Enabled(fp->bundle, OPT_IPCP)) { 542 if (fp->bundle->radius.cfg.file && fp->bundle->radius.filterid) 543 system_Select(fp->bundle, fp->bundle->radius.filterid, LINKDOWNFILE, 544 NULL, NULL); 545 } 546 #endif 547 548 /* 549 * XXX this stuff should really live in the FSM. Our config should 550 * associate executable sections in files with events. 551 */ 552 if (system_Select(fp->bundle, addr, LINKDOWNFILE, NULL, NULL) < 0) { 553 /* 554 * XXX: Avoid duplicate evaluation of label between IPCP and 555 * IPV6CP. When IPCP is enabled and rejected, label is not 556 * evaluated. 557 */ 558 if (bundle_GetLabel(fp->bundle) && !Enabled(fp->bundle, OPT_IPCP)) { 559 if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle), 560 LINKDOWNFILE, NULL, NULL) < 0) 561 system_Select(fp->bundle, "MYADDR6", LINKDOWNFILE, NULL, NULL); 562 } else 563 system_Select(fp->bundle, "MYADDR6", LINKDOWNFILE, NULL, NULL); 564 } 565 566 ipv6cp_Setup(ipv6cp); 567 } 568 recursing--; 569 } 570 571 static void 572 ipv6cp_LayerStart(struct fsm *fp) 573 { 574 /* We're about to start up ! */ 575 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 576 577 log_Printf(LogIPV6CP, "%s: LayerStart.\n", fp->link->name); 578 throughput_start(&ipv6cp->throughput, "IPV6CP throughput", 579 Enabled(fp->bundle, OPT_THROUGHPUT)); 580 fp->more.reqs = fp->more.naks = fp->more.rejs = ipv6cp->cfg.fsm.maxreq * 3; 581 ipv6cp->peer_tokenreq = 0; 582 } 583 584 static void 585 ipv6cp_LayerFinish(struct fsm *fp) 586 { 587 /* We're now down */ 588 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 589 590 log_Printf(LogIPV6CP, "%s: LayerFinish.\n", fp->link->name); 591 throughput_stop(&ipv6cp->throughput); 592 throughput_log(&ipv6cp->throughput, LogIPV6CP, NULL); 593 } 594 595 static void 596 ipv6cp_InitRestartCounter(struct fsm *fp, int what) 597 { 598 /* Set fsm timer load */ 599 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 600 601 fp->FsmTimer.load = ipv6cp->cfg.fsm.timeout * SECTICKS; 602 switch (what) { 603 case FSM_REQ_TIMER: 604 fp->restart = ipv6cp->cfg.fsm.maxreq; 605 break; 606 case FSM_TRM_TIMER: 607 fp->restart = ipv6cp->cfg.fsm.maxtrm; 608 break; 609 default: 610 fp->restart = 1; 611 break; 612 } 613 } 614 615 static void 616 ipv6cp_SendConfigReq(struct fsm *fp) 617 { 618 /* Send config REQ please */ 619 struct physical *p = link2physical(fp->link); 620 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 621 u_char buff[IPV6CP_IFIDLEN+2]; 622 struct fsm_opt *o; 623 624 o = (struct fsm_opt *)buff; 625 626 if ((p && !physical_IsSync(p)) || !REJECTED(ipv6cp, TY_TOKEN)) { 627 memcpy(o->data, ipv6cp->my_ifid, IPV6CP_IFIDLEN); 628 INC_FSM_OPT(TY_TOKEN, IPV6CP_IFIDLEN + 2, o); 629 } 630 631 fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff, 632 MB_IPV6CPOUT); 633 } 634 635 static void 636 ipv6cp_SentTerminateReq(struct fsm *fp __unused) 637 { 638 /* Term REQ just sent by FSM */ 639 } 640 641 static void 642 ipv6cp_SendTerminateAck(struct fsm *fp, u_char id) 643 { 644 /* Send Term ACK please */ 645 fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_IPV6CPOUT); 646 } 647 648 static const char * 649 protoname(unsigned proto) 650 { 651 static const char *cftypes[] = { "IFACEID", "COMPPROTO" }; 652 653 if (proto > 0 && proto <= sizeof cftypes / sizeof *cftypes) 654 return cftypes[proto - 1]; 655 656 return NumStr(proto, NULL, 0); 657 } 658 659 static void 660 ipv6cp_ValidateInterfaceID(struct ipv6cp *ipv6cp, u_char *ifid, 661 struct fsm_decode *dec) 662 { 663 struct fsm_opt opt; 664 u_char zero[IPV6CP_IFIDLEN]; 665 666 memset(zero, 0, IPV6CP_IFIDLEN); 667 668 if (memcmp(ifid, zero, IPV6CP_IFIDLEN) != 0 669 && memcmp(ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) != 0) 670 memcpy(ipv6cp->his_ifid, ifid, IPV6CP_IFIDLEN); 671 672 opt.hdr.id = TY_TOKEN; 673 opt.hdr.len = IPV6CP_IFIDLEN + 2; 674 memcpy(opt.data, &ipv6cp->his_ifid, IPV6CP_IFIDLEN); 675 if (memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0) 676 fsm_ack(dec, &opt); 677 else 678 fsm_nak(dec, &opt); 679 } 680 681 static void 682 ipv6cp_DecodeConfig(struct fsm *fp, u_char *cp, u_char *end, int mode_type, 683 struct fsm_decode *dec) 684 { 685 /* Deal with incoming PROTO_IPV6CP */ 686 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 687 int n; 688 char tbuff[100]; 689 u_char ifid[IPV6CP_IFIDLEN], zero[IPV6CP_IFIDLEN]; 690 struct fsm_opt *opt; 691 692 memset(zero, 0, IPV6CP_IFIDLEN); 693 694 while (end - cp >= (int)sizeof(opt->hdr)) { 695 if ((opt = fsm_readopt(&cp)) == NULL) 696 break; 697 698 snprintf(tbuff, sizeof tbuff, " %s[%d]", protoname(opt->hdr.id), 699 opt->hdr.len); 700 701 switch (opt->hdr.id) { 702 case TY_TOKEN: 703 memcpy(ifid, opt->data, IPV6CP_IFIDLEN); 704 log_Printf(LogIPV6CP, "%s 0x%02x%02x%02x%02x%02x%02x%02x%02x\n", tbuff, 705 ifid[0], ifid[1], ifid[2], ifid[3], ifid[4], ifid[5], ifid[6], ifid[7]); 706 707 switch (mode_type) { 708 case MODE_REQ: 709 ipv6cp->peer_tokenreq = 1; 710 ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec); 711 break; 712 713 case MODE_NAK: 714 if (memcmp(ifid, zero, IPV6CP_IFIDLEN) == 0) { 715 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, 716 "0x0000000000000000: Unacceptable IntefaceID!\n"); 717 fsm_Close(&ipv6cp->fsm); 718 } else if (memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0) { 719 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, 720 "0x%02x%02x%02x%02x%02x%02x%02x%02x: " 721 "Unacceptable IntefaceID!\n", 722 ifid[0], ifid[1], ifid[2], ifid[3], 723 ifid[4], ifid[5], ifid[6], ifid[7]); 724 } else if (memcmp(ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) != 0) { 725 n = 100; 726 while (n && !ipcp_SetIPv6address(ipv6cp, ifid, ipv6cp->his_ifid)) { 727 do { 728 n--; 729 SetInterfaceID(ifid, 1); 730 } while (n && memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0); 731 } 732 733 if (n == 0) { 734 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, 735 "0x0000000000000000: Unacceptable IntefaceID!\n"); 736 fsm_Close(&ipv6cp->fsm); 737 } else { 738 log_Printf(LogIPV6CP, "%s changing IntefaceID: " 739 "0x%02x%02x%02x%02x%02x%02x%02x%02x " 740 "--> 0x%02x%02x%02x%02x%02x%02x%02x%02x\n", tbuff, 741 ipv6cp->my_ifid[0], ipv6cp->my_ifid[1], 742 ipv6cp->my_ifid[2], ipv6cp->my_ifid[3], 743 ipv6cp->my_ifid[4], ipv6cp->my_ifid[5], 744 ipv6cp->my_ifid[6], ipv6cp->my_ifid[7], 745 ifid[0], ifid[1], ifid[2], ifid[3], 746 ifid[4], ifid[5], ifid[6], ifid[7]); 747 memcpy(ipv6cp->my_ifid, ifid, IPV6CP_IFIDLEN); 748 bundle_AdjustFilters(fp->bundle, &ipv6cp->myaddr, NULL); 749 } 750 } 751 break; 752 753 case MODE_REJ: 754 ipv6cp->his_reject |= (1 << opt->hdr.id); 755 break; 756 } 757 break; 758 759 default: 760 if (mode_type != MODE_NOP) { 761 ipv6cp->my_reject |= (1 << opt->hdr.id); 762 fsm_rej(dec, opt); 763 } 764 break; 765 } 766 } 767 768 if (mode_type != MODE_NOP) { 769 if (mode_type == MODE_REQ && !ipv6cp->peer_tokenreq) { 770 if (dec->rejend == dec->rej && dec->nakend == dec->nak) { 771 /* 772 * Pretend the peer has requested a TOKEN. 773 * We do this to ensure that we only send one NAK if the only 774 * reason for the NAK is because the peer isn't sending a 775 * TY_TOKEN REQ. This stops us from repeatedly trying to tell 776 * the peer that we have to have an IP address on their end. 777 */ 778 ipv6cp->peer_tokenreq = 1; 779 } 780 memset(ifid, 0, IPV6CP_IFIDLEN); 781 ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec); 782 } 783 fsm_opt_normalise(dec); 784 } 785 } 786 #endif 787
