ipv6cp.c revision 102558
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: head/usr.sbin/ppp/ipv6cp.c 102558 2002-08-29 02:44:58Z brian $ 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 82 83#ifndef NOINET6 84static int ipv6cp_LayerUp(struct fsm *); 85static void ipv6cp_LayerDown(struct fsm *); 86static void ipv6cp_LayerStart(struct fsm *); 87static void ipv6cp_LayerFinish(struct fsm *); 88static void ipv6cp_InitRestartCounter(struct fsm *, int); 89static void ipv6cp_SendConfigReq(struct fsm *); 90static void ipv6cp_SentTerminateReq(struct fsm *); 91static void ipv6cp_SendTerminateAck(struct fsm *, u_char); 92static void ipv6cp_DecodeConfig(struct fsm *, u_char *, u_char *, int, 93 struct fsm_decode *); 94 95static struct fsm_callbacks ipv6cp_Callbacks = { 96 ipv6cp_LayerUp, 97 ipv6cp_LayerDown, 98 ipv6cp_LayerStart, 99 ipv6cp_LayerFinish, 100 ipv6cp_InitRestartCounter, 101 ipv6cp_SendConfigReq, 102 ipv6cp_SentTerminateReq, 103 ipv6cp_SendTerminateAck, 104 ipv6cp_DecodeConfig, 105 fsm_NullRecvResetReq, 106 fsm_NullRecvResetAck 107}; 108 109static void 110SetInterfaceID(u_char *ifid, int userandom) 111{ 112 struct ifaddrs *ifa, *ifap = NULL; 113 struct sockaddr_dl *sdl; 114 const u_long i32_max = 0xffffffff; 115 u_long r1, r2; 116 117 /* configure an interface ID based on Section 4.1 of RFC 2472 */ 118 memset(ifid, 0, IPV6CP_IFIDLEN); 119 120 /* 121 * 1) If an IEEE global identifier (EUI-48 or EUI-64) is 122 * available anywhere on the node, it should be used to construct 123 * the tentative Interface-Identifier due to its uniqueness 124 * properties. 125 */ 126 if (userandom) 127 goto randomid; 128 if (getifaddrs(&ifap) < 0) 129 goto randomid; 130 131 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 132 char *cp; 133 134 if (ifa->ifa_addr->sa_family != AF_LINK) 135 continue; 136 137 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 138 if (sdl->sdl_alen < 6) 139 continue; 140 /* we're only interested in IEEE hardware addresses */ 141 switch(sdl->sdl_type) { 142 case IFT_ETHER: 143 case IFT_FDDI: 144 /* XXX need more cases? */ 145 break; 146 default: 147 continue; 148 } 149 150 cp = (char *)(sdl->sdl_data + sdl->sdl_nlen); 151 ifid[0] = cp[0]; 152 ifid[0] ^= 0x02; /* reverse the u/l bit*/ 153 ifid[1] = cp[1]; 154 ifid[2] = cp[2]; 155 ifid[3] = 0xff; 156 ifid[4] = 0xfe; 157 ifid[5] = cp[3]; 158 ifid[6] = cp[4]; 159 ifid[7] = cp[5]; 160 161 freeifaddrs(ifap); 162 return; 163 } 164 165 freeifaddrs(ifap); 166 167 /* 168 * 2) If an IEEE global identifier is not available a different source 169 * of uniqueness should be used. 170 * XXX: we skip this case. 171 */ 172 173 /* 174 * 3) If a good source of uniqueness cannot be found, it is 175 * recommended that a random number be generated. In this case the 176 * "u" bit of the interface identifier MUST be set to zero (0). 177 */ 178 randomid: 179 randinit(); 180 r1 = (((u_long)random()) % i32_max) + 1; 181 r2 = (((u_long)random()) % i32_max) + 1; 182 memcpy(ifid, &r1, sizeof(r1)); 183 memcpy(ifid + 4, &r2, sizeof(r2)); 184 ifid[0] &= 0xfd; 185 return; 186} 187 188static int 189ipcp_SetIPv6address(struct ipv6cp *ipv6cp, u_char *myifid, u_char *hisifid) 190{ 191 struct bundle *bundle = ipv6cp->fsm.bundle; 192 struct in6_addr myaddr, hisaddr; 193 struct ncprange myrange; 194 struct sockaddr_storage ssdst, ssgw, ssmask; 195 struct sockaddr *sadst, *sagw, *samask; 196 197 sadst = (struct sockaddr *)&ssdst; 198 sagw = (struct sockaddr *)&ssgw; 199 samask = (struct sockaddr *)&ssmask; 200 201 memset(&myaddr, '\0', sizeof myaddr); 202 memset(&hisaddr, '\0', sizeof hisaddr); 203 204 myaddr.s6_addr[0] = 0xfe; 205 myaddr.s6_addr[1] = 0x80; 206 memcpy(&myaddr.s6_addr[8], myifid, IPV6CP_IFIDLEN); 207#if 0 208 myaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */ 209#endif 210 211 hisaddr.s6_addr[0] = 0xfe; 212 hisaddr.s6_addr[1] = 0x80; 213 memcpy(&hisaddr.s6_addr[8], hisifid, IPV6CP_IFIDLEN); 214#if 0 215 hisaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */ 216#endif 217 218 ncpaddr_setip6(&ipv6cp->myaddr, &myaddr); 219 ncpaddr_setip6(&ipv6cp->hisaddr, &hisaddr); 220 ncprange_sethost(&myrange, &ipv6cp->myaddr); 221 222 if (!iface_Add(bundle->iface, &bundle->ncp, &myrange, &ipv6cp->hisaddr, 223 IFACE_ADD_FIRST|IFACE_FORCE_ADD|IFACE_SYSTEM)) 224 return 0; 225 226 if (!Enabled(bundle, OPT_IFACEALIAS)) 227 iface_Clear(bundle->iface, &bundle->ncp, AF_INET6, 228 IFACE_CLEAR_ALIASES|IFACE_SYSTEM); 229 230 if (bundle->ncp.cfg.sendpipe > 0 || bundle->ncp.cfg.recvpipe > 0) { 231 ncprange_getsa(&myrange, &ssgw, &ssmask); 232 if (ncpaddr_isset(&ipv6cp->hisaddr)) 233 ncpaddr_getsa(&ipv6cp->hisaddr, &ssdst); 234 else 235 sadst = NULL; 236 rt_Update(bundle, sadst, sagw, samask); 237 } 238 239 if (Enabled(bundle, OPT_SROUTES)) 240 route_Change(bundle, bundle->ncp.route, &ipv6cp->myaddr, &ipv6cp->hisaddr); 241 242#ifndef NORADIUS 243 if (bundle->radius.valid) 244 route_Change(bundle, bundle->radius.routes, &ipv6cp->myaddr, 245 &ipv6cp->hisaddr); 246#endif 247 248 return 1; /* Ok */ 249} 250 251void 252ipv6cp_Init(struct ipv6cp *ipv6cp, struct bundle *bundle, struct link *l, 253 const struct fsm_parent *parent) 254{ 255 static const char * const timer_names[] = 256 {"IPV6CP restart", "IPV6CP openmode", "IPV6CP stopped"}; 257 int n; 258 259 fsm_Init(&ipv6cp->fsm, "IPV6CP", PROTO_IPV6CP, 1, IPV6CP_MAXCODE, LogIPV6CP, 260 bundle, l, parent, &ipv6cp_Callbacks, timer_names); 261 262 ipv6cp->cfg.fsm.timeout = DEF_FSMRETRY; 263 ipv6cp->cfg.fsm.maxreq = DEF_FSMTRIES; 264 ipv6cp->cfg.fsm.maxtrm = DEF_FSMTRIES; 265 266 SetInterfaceID(ipv6cp->my_ifid, 0); 267 do { 268 SetInterfaceID(ipv6cp->his_ifid, 1); 269 } while (memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0); 270 271 if (probe.ipv6_available) { 272 n = 100; 273 while (n && 274 !ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) { 275 do { 276 n--; 277 SetInterfaceID(ipv6cp->my_ifid, 1); 278 } while (n 279 && memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0); 280 } 281 } 282 283 throughput_init(&ipv6cp->throughput, SAMPLE_PERIOD); 284 memset(ipv6cp->Queue, '\0', sizeof ipv6cp->Queue); 285 ipv6cp_Setup(ipv6cp); 286} 287 288void 289ipv6cp_Destroy(struct ipv6cp *ipv6cp) 290{ 291 throughput_destroy(&ipv6cp->throughput); 292} 293 294void 295ipv6cp_Setup(struct ipv6cp *ipv6cp) 296{ 297 ncpaddr_init(&ipv6cp->myaddr); 298 ncpaddr_init(&ipv6cp->hisaddr); 299 300 ipv6cp->his_reject = 0; 301 ipv6cp->my_reject = 0; 302} 303 304void 305ipv6cp_SetLink(struct ipv6cp *ipv6cp, struct link *l) 306{ 307 ipv6cp->fsm.link = l; 308} 309 310int 311ipv6cp_Show(struct cmdargs const *arg) 312{ 313 struct ipv6cp *ipv6cp = &arg->bundle->ncp.ipv6cp; 314 315 prompt_Printf(arg->prompt, "%s [%s]\n", ipv6cp->fsm.name, 316 State2Nam(ipv6cp->fsm.state)); 317 if (ipv6cp->fsm.state == ST_OPENED) { 318 prompt_Printf(arg->prompt, " His side: %s\n", 319 ncpaddr_ntoa(&ipv6cp->hisaddr)); 320 prompt_Printf(arg->prompt, " My side: %s\n", 321 ncpaddr_ntoa(&ipv6cp->myaddr)); 322 prompt_Printf(arg->prompt, " Queued packets: %lu\n", 323 (unsigned long)ipv6cp_QueueLen(ipv6cp)); 324 } 325 326 prompt_Printf(arg->prompt, "\nDefaults:\n"); 327 prompt_Printf(arg->prompt, " FSM retry = %us, max %u Config" 328 " REQ%s, %u Term REQ%s\n\n", ipv6cp->cfg.fsm.timeout, 329 ipv6cp->cfg.fsm.maxreq, ipv6cp->cfg.fsm.maxreq == 1 ? "" : "s", 330 ipv6cp->cfg.fsm.maxtrm, ipv6cp->cfg.fsm.maxtrm == 1 ? "" : "s"); 331 332 throughput_disp(&ipv6cp->throughput, arg->prompt); 333 334 return 0; 335} 336 337struct mbuf * 338ipv6cp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp) 339{ 340 /* Got PROTO_IPV6CP from link */ 341 m_settype(bp, MB_IPV6CPIN); 342 if (bundle_Phase(bundle) == PHASE_NETWORK) 343 fsm_Input(&bundle->ncp.ipv6cp.fsm, bp); 344 else { 345 if (bundle_Phase(bundle) < PHASE_NETWORK) 346 log_Printf(LogIPV6CP, "%s: Error: Unexpected IPV6CP in phase %s" 347 " (ignored)\n", l->name, bundle_PhaseName(bundle)); 348 m_freem(bp); 349 } 350 return NULL; 351} 352 353void 354ipv6cp_AddInOctets(struct ipv6cp *ipv6cp, int n) 355{ 356 throughput_addin(&ipv6cp->throughput, n); 357} 358 359void 360ipv6cp_AddOutOctets(struct ipv6cp *ipv6cp, int n) 361{ 362 throughput_addout(&ipv6cp->throughput, n); 363} 364 365void 366ipv6cp_IfaceAddrAdded(struct ipv6cp *ipv6cp, const struct iface_addr *addr) 367{ 368} 369 370void 371ipv6cp_IfaceAddrDeleted(struct ipv6cp *ipv6cp, const struct iface_addr *addr) 372{ 373} 374 375int 376ipv6cp_InterfaceUp(struct ipv6cp *ipv6cp) 377{ 378 if (!ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) { 379 log_Printf(LogERROR, "ipv6cp_InterfaceUp: unable to set ipv6 address\n"); 380 return 0; 381 } 382 383 if (!iface_SetFlags(ipv6cp->fsm.bundle->iface->name, IFF_UP)) { 384 log_Printf(LogERROR, "ipv6cp_InterfaceUp: Can't set the IFF_UP" 385 " flag on %s\n", ipv6cp->fsm.bundle->iface->name); 386 return 0; 387 } 388 389 return 1; 390} 391 392size_t 393ipv6cp_QueueLen(struct ipv6cp *ipv6cp) 394{ 395 struct mqueue *q; 396 size_t result; 397 398 result = 0; 399 for (q = ipv6cp->Queue; q < ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp); q++) 400 result += q->len; 401 402 return result; 403} 404 405int 406ipv6cp_PushPacket(struct ipv6cp *ipv6cp, struct link *l) 407{ 408 struct bundle *bundle = ipv6cp->fsm.bundle; 409 struct mqueue *queue; 410 struct mbuf *bp; 411 int m_len; 412 u_int32_t secs = 0; 413 unsigned alivesecs = 0; 414 415 if (ipv6cp->fsm.state != ST_OPENED) 416 return 0; 417 418 /* 419 * If ccp is not open but is required, do nothing. 420 */ 421 if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) { 422 log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name); 423 return 0; 424 } 425 426 queue = ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp) - 1; 427 do { 428 if (queue->top) { 429 bp = m_dequeue(queue); 430 bp = mbuf_Read(bp, &secs, sizeof secs); 431 bp = m_pullup(bp); 432 m_len = m_length(bp); 433 if (!FilterCheck(MBUF_CTOP(bp), AF_INET6, &bundle->filter.alive, 434 &alivesecs)) { 435 if (secs == 0) 436 secs = alivesecs; 437 bundle_StartIdleTimer(bundle, secs); 438 } 439 link_PushPacket(l, bp, bundle, 0, PROTO_IPV6); 440 ipv6cp_AddOutOctets(ipv6cp, m_len); 441 return 1; 442 } 443 } while (queue-- != ipv6cp->Queue); 444 445 return 0; 446} 447 448static int 449ipv6cp_LayerUp(struct fsm *fp) 450{ 451 /* We're now up */ 452 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 453 char tbuff[40]; 454 455 log_Printf(LogIPV6CP, "%s: LayerUp.\n", fp->link->name); 456 if (!ipv6cp_InterfaceUp(ipv6cp)) 457 return 0; 458 459 snprintf(tbuff, sizeof tbuff, "%s", ncpaddr_ntoa(&ipv6cp->myaddr)); 460 log_Printf(LogIPV6CP, "myaddr %s hisaddr = %s\n", 461 tbuff, ncpaddr_ntoa(&ipv6cp->hisaddr)); 462 463 /* XXX: Call radius_Account() and system_Select() */ 464 465 fp->more.reqs = fp->more.naks = fp->more.rejs = ipv6cp->cfg.fsm.maxreq * 3; 466 log_DisplayPrompts(); 467 468 return 1; 469} 470 471static void 472ipv6cp_LayerDown(struct fsm *fp) 473{ 474 /* About to come down */ 475 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 476 static int recursing; 477 char addr[40]; 478 479 if (!recursing++) { 480 snprintf(addr, sizeof addr, "%s", ncpaddr_ntoa(&ipv6cp->myaddr)); 481 log_Printf(LogIPV6CP, "%s: LayerDown: %s\n", fp->link->name, addr); 482 483 /* XXX: Call radius_Account() and system_Select() */ 484 485 ipv6cp_Setup(ipv6cp); 486 } 487 recursing--; 488} 489 490static void 491ipv6cp_LayerStart(struct fsm *fp) 492{ 493 /* We're about to start up ! */ 494 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 495 496 log_Printf(LogIPV6CP, "%s: LayerStart.\n", fp->link->name); 497 throughput_start(&ipv6cp->throughput, "IPV6CP throughput", 498 Enabled(fp->bundle, OPT_THROUGHPUT)); 499 fp->more.reqs = fp->more.naks = fp->more.rejs = ipv6cp->cfg.fsm.maxreq * 3; 500 ipv6cp->peer_tokenreq = 0; 501} 502 503static void 504ipv6cp_LayerFinish(struct fsm *fp) 505{ 506 /* We're now down */ 507 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 508 509 log_Printf(LogIPV6CP, "%s: LayerFinish.\n", fp->link->name); 510 throughput_stop(&ipv6cp->throughput); 511 throughput_log(&ipv6cp->throughput, LogIPV6CP, NULL); 512} 513 514static void 515ipv6cp_InitRestartCounter(struct fsm *fp, int what) 516{ 517 /* Set fsm timer load */ 518 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 519 520 fp->FsmTimer.load = ipv6cp->cfg.fsm.timeout * SECTICKS; 521 switch (what) { 522 case FSM_REQ_TIMER: 523 fp->restart = ipv6cp->cfg.fsm.maxreq; 524 break; 525 case FSM_TRM_TIMER: 526 fp->restart = ipv6cp->cfg.fsm.maxtrm; 527 break; 528 default: 529 fp->restart = 1; 530 break; 531 } 532} 533 534static void 535ipv6cp_SendConfigReq(struct fsm *fp) 536{ 537 /* Send config REQ please */ 538 struct physical *p = link2physical(fp->link); 539 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 540 u_char buff[IPV6CP_IFIDLEN+2]; 541 struct fsm_opt *o; 542 543 o = (struct fsm_opt *)buff; 544 545 if ((p && !physical_IsSync(p)) || !REJECTED(ipv6cp, TY_TOKEN)) { 546 memcpy(o->data, ipv6cp->my_ifid, IPV6CP_IFIDLEN); 547 INC_FSM_OPT(TY_TOKEN, IPV6CP_IFIDLEN + 2, o); 548 } 549 550 fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff, 551 MB_IPV6CPOUT); 552} 553 554static void 555ipv6cp_SentTerminateReq(struct fsm *fp) 556{ 557 /* Term REQ just sent by FSM */ 558} 559 560static void 561ipv6cp_SendTerminateAck(struct fsm *fp, u_char id) 562{ 563 /* Send Term ACK please */ 564 fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_IPV6CPOUT); 565} 566 567static const char * 568protoname(int proto) 569{ 570 static const char *cftypes[] = { "IFACEID", "COMPPROTO" }; 571 572 if (proto > 0 && proto <= sizeof cftypes / sizeof *cftypes) 573 return cftypes[proto - 1]; 574 575 return NumStr(proto, NULL, 0); 576} 577 578static void 579ipv6cp_ValidateInterfaceID(struct ipv6cp *ipv6cp, u_char *ifid, 580 struct fsm_decode *dec) 581{ 582 struct fsm_opt opt; 583 u_char zero[IPV6CP_IFIDLEN]; 584 585 memset(zero, 0, IPV6CP_IFIDLEN); 586 587 if (memcmp(ifid, zero, IPV6CP_IFIDLEN) != 0 588 && memcmp(ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) != 0) 589 memcpy(ipv6cp->his_ifid, ifid, IPV6CP_IFIDLEN); 590 591 opt.hdr.id = TY_TOKEN; 592 opt.hdr.len = IPV6CP_IFIDLEN + 2; 593 memcpy(opt.data, &ipv6cp->his_ifid, IPV6CP_IFIDLEN); 594 if (memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0) 595 fsm_ack(dec, &opt); 596 else 597 fsm_nak(dec, &opt); 598} 599 600static void 601ipv6cp_DecodeConfig(struct fsm *fp, u_char *cp, u_char *end, int mode_type, 602 struct fsm_decode *dec) 603{ 604 /* Deal with incoming PROTO_IPV6CP */ 605 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); 606 int n; 607 char tbuff[100]; 608 u_char ifid[IPV6CP_IFIDLEN], zero[IPV6CP_IFIDLEN]; 609 struct fsm_opt *opt; 610 611 memset(zero, 0, IPV6CP_IFIDLEN); 612 613 while (end - cp >= sizeof(opt->hdr)) { 614 if ((opt = fsm_readopt(&cp)) == NULL) 615 break; 616 617 snprintf(tbuff, sizeof tbuff, " %s[%d]", protoname(opt->hdr.id), 618 opt->hdr.len); 619 620 switch (opt->hdr.id) { 621 case TY_TOKEN: 622 memcpy(ifid, opt->data, IPV6CP_IFIDLEN); 623 log_Printf(LogIPV6CP, "%s 0x%02x%02x%02x%02x%02x%02x%02x%02x\n", tbuff, 624 ifid[0], ifid[1], ifid[2], ifid[3], ifid[4], ifid[5], ifid[6], ifid[7]); 625 626 switch (mode_type) { 627 case MODE_REQ: 628 ipv6cp->peer_tokenreq = 1; 629 ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec); 630 break; 631 632 case MODE_NAK: 633 if (memcmp(ifid, zero, IPV6CP_IFIDLEN) == 0) { 634 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, 635 "0x0000000000000000: Unacceptable IntefaceID!\n"); 636 fsm_Close(&ipv6cp->fsm); 637 } else if (memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0) { 638 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, 639 "0x%02x%02x%02x%02x%02x%02x%02x%02x: " 640 "Unacceptable IntefaceID!\n", 641 ifid[0], ifid[1], ifid[2], ifid[3], 642 ifid[4], ifid[5], ifid[6], ifid[7]); 643 } else if (memcmp(ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) != 0) { 644 n = 100; 645 while (n && !ipcp_SetIPv6address(ipv6cp, ifid, ipv6cp->his_ifid)) { 646 do { 647 n--; 648 SetInterfaceID(ifid, 1); 649 } while (n && memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0); 650 } 651 652 if (n == 0) { 653 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, 654 "0x0000000000000000: Unacceptable IntefaceID!\n"); 655 fsm_Close(&ipv6cp->fsm); 656 } else { 657 log_Printf(LogIPV6CP, "%s changing IntefaceID: " 658 "0x%02x%02x%02x%02x%02x%02x%02x%02x " 659 "--> 0x%02x%02x%02x%02x%02x%02x%02x%02x\n", tbuff, 660 ipv6cp->my_ifid[0], ipv6cp->my_ifid[1], 661 ipv6cp->my_ifid[2], ipv6cp->my_ifid[3], 662 ipv6cp->my_ifid[4], ipv6cp->my_ifid[5], 663 ipv6cp->my_ifid[6], ipv6cp->my_ifid[7], 664 ifid[0], ifid[1], ifid[2], ifid[3], 665 ifid[4], ifid[5], ifid[6], ifid[7]); 666 memcpy(ipv6cp->my_ifid, ifid, IPV6CP_IFIDLEN); 667 bundle_AdjustFilters(fp->bundle, &ipv6cp->myaddr, NULL); 668 } 669 } 670 break; 671 672 case MODE_REJ: 673 ipv6cp->his_reject |= (1 << opt->hdr.id); 674 break; 675 } 676 break; 677 678 default: 679 if (mode_type != MODE_NOP) { 680 ipv6cp->my_reject |= (1 << opt->hdr.id); 681 fsm_rej(dec, opt); 682 } 683 break; 684 } 685 } 686 687 if (mode_type != MODE_NOP) { 688 if (mode_type == MODE_REQ && !ipv6cp->peer_tokenreq) { 689 if (dec->rejend == dec->rej && dec->nakend == dec->nak) { 690 /* 691 * Pretend the peer has requested a TOKEN. 692 * We do this to ensure that we only send one NAK if the only 693 * reason for the NAK is because the peer isn't sending a 694 * TY_TOKEN REQ. This stops us from repeatedly trying to tell 695 * the peer that we have to have an IP address on their end. 696 */ 697 ipv6cp->peer_tokenreq = 1; 698 } 699 memset(ifid, 0, IPV6CP_IFIDLEN); 700 ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec); 701 } 702 fsm_opt_normalise(dec); 703 } 704} 705#endif 706