2 * Copyright (c) 2001 Brian Somers <brian@Awfulhak.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * $FreeBSD: src/usr.sbin/ppp/ipv6cp.c,v 1.8.2.4 2003/04/29 16:04:41 ume Exp $
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>
36 #include <net/if_types.h>
37 #include <net/if_dl.h>
53 #include "throughput.h"
54 #include "slcompress.h"
63 #include "descriptor.h"
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;
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 *);
102 static struct fsm_callbacks ipv6cp_Callbacks = {
107 ipv6cp_InitRestartCounter,
108 ipv6cp_SendConfigReq,
109 ipv6cp_SentTerminateReq,
110 ipv6cp_SendTerminateAck,
112 fsm_NullRecvResetReq,
117 SetInterfaceID(u_char *ifid, int userandom)
119 struct ifaddrs *ifa, *ifap = NULL;
120 struct sockaddr_dl *sdl;
121 const u_long i32_max = 0xffffffff;
124 /* configure an interface ID based on Section 4.1 of RFC 2472 */
125 memset(ifid, 0, IPV6CP_IFIDLEN);
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
135 if (getifaddrs(&ifap) < 0)
138 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
141 if (ifa->ifa_addr->sa_family != AF_LINK)
144 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
145 if (sdl->sdl_alen < 6)
147 /* we're only interested in IEEE hardware addresses */
148 switch(sdl->sdl_type) {
151 /* XXX need more cases? */
157 cp = (char *)(sdl->sdl_data + sdl->sdl_nlen);
159 ifid[0] ^= 0x02; /* reverse the u/l bit*/
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.
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).
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));
196 ipcp_SetIPv6address(struct ipv6cp *ipv6cp, u_char *myifid, u_char *hisifid)
198 struct bundle *bundle = ipv6cp->fsm.bundle;
199 struct in6_addr myaddr, hisaddr;
200 struct ncprange myrange, range;
202 struct sockaddr_storage ssdst, ssgw, ssmask;
203 struct sockaddr *sadst, *sagw, *samask;
205 sadst = (struct sockaddr *)&ssdst;
206 sagw = (struct sockaddr *)&ssgw;
207 samask = (struct sockaddr *)&ssmask;
209 memset(&myaddr, '\0', sizeof myaddr);
210 memset(&hisaddr, '\0', sizeof hisaddr);
212 myaddr.s6_addr[0] = 0xfe;
213 myaddr.s6_addr[1] = 0x80;
214 memcpy(&myaddr.s6_addr[8], myifid, IPV6CP_IFIDLEN);
216 myaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */
219 hisaddr.s6_addr[0] = 0xfe;
220 hisaddr.s6_addr[1] = 0x80;
221 memcpy(&hisaddr.s6_addr[8], hisifid, IPV6CP_IFIDLEN);
223 hisaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */
226 ncpaddr_setip6(&ipv6cp->myaddr, &myaddr);
227 ncpaddr_setip6(&ipv6cp->hisaddr, &hisaddr);
228 ncprange_set(&myrange, &ipv6cp->myaddr, 64);
230 if (!iface_Add(bundle->iface, &bundle->ncp, &myrange, &ipv6cp->hisaddr,
231 IFACE_ADD_FIRST|IFACE_FORCE_ADD|IFACE_SYSTEM))
234 if (!Enabled(bundle, OPT_IFACEALIAS))
235 iface_Clear(bundle->iface, &bundle->ncp, AF_INET6,
236 IFACE_CLEAR_ALIASES|IFACE_SYSTEM);
238 ncpaddr_setip6(&addr, &in6addr_linklocal_mcast);
239 ncprange_set(&range, &addr, 32);
240 rt_Set(bundle, RTM_ADD, &range, &ipv6cp->myaddr, 1, 0);
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);
248 rt_Update(bundle, sadst, sagw, samask);
251 if (Enabled(bundle, OPT_SROUTES))
252 route_Change(bundle, bundle->ncp.route, &ipv6cp->myaddr, &ipv6cp->hisaddr);
255 if (bundle->radius.valid)
256 route_Change(bundle, bundle->radius.routes, &ipv6cp->myaddr,
264 ipv6cp_Init(struct ipv6cp *ipv6cp, struct bundle *bundle, struct link *l,
265 const struct fsm_parent *parent)
267 static const char * const timer_names[] =
268 {"IPV6CP restart", "IPV6CP openmode", "IPV6CP stopped"};
271 fsm_Init(&ipv6cp->fsm, "IPV6CP", PROTO_IPV6CP, 1, IPV6CP_MAXCODE, LogIPV6CP,
272 bundle, l, parent, &ipv6cp_Callbacks, timer_names);
274 ipv6cp->cfg.fsm.timeout = DEF_FSMRETRY;
275 ipv6cp->cfg.fsm.maxreq = DEF_FSMTRIES;
276 ipv6cp->cfg.fsm.maxtrm = DEF_FSMTRIES;
278 SetInterfaceID(ipv6cp->my_ifid, 0);
280 SetInterfaceID(ipv6cp->his_ifid, 1);
281 } while (memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0);
283 if (probe.ipv6_available) {
286 !ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) {
289 SetInterfaceID(ipv6cp->my_ifid, 1);
291 && memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0);
295 throughput_init(&ipv6cp->throughput, SAMPLE_PERIOD);
296 memset(ipv6cp->Queue, '\0', sizeof ipv6cp->Queue);
297 ipv6cp_Setup(ipv6cp);
301 ipv6cp_Destroy(struct ipv6cp *ipv6cp)
303 throughput_destroy(&ipv6cp->throughput);
307 ipv6cp_Setup(struct ipv6cp *ipv6cp)
309 ncpaddr_init(&ipv6cp->myaddr);
310 ncpaddr_init(&ipv6cp->hisaddr);
312 ipv6cp->his_reject = 0;
313 ipv6cp->my_reject = 0;
317 ipv6cp_SetLink(struct ipv6cp *ipv6cp, struct link *l)
319 ipv6cp->fsm.link = l;
323 ipv6cp_Show(struct cmdargs const *arg)
325 struct ipv6cp *ipv6cp = &arg->bundle->ncp.ipv6cp;
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));
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");
344 throughput_disp(&ipv6cp->throughput, arg->prompt);
350 ipv6cp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
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);
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));
366 ipv6cp_AddInOctets(struct ipv6cp *ipv6cp, int n)
368 throughput_addin(&ipv6cp->throughput, n);
372 ipv6cp_AddOutOctets(struct ipv6cp *ipv6cp, int n)
374 throughput_addout(&ipv6cp->throughput, n);
378 ipv6cp_IfaceAddrAdded(struct ipv6cp *ipv6cp __unused,
379 const struct iface_addr *addr __unused)
384 ipv6cp_IfaceAddrDeleted(struct ipv6cp *ipv6cp __unused,
385 const struct iface_addr *addr __unused)
390 ipv6cp_InterfaceUp(struct ipv6cp *ipv6cp)
392 if (!ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) {
393 log_Printf(LogERROR, "ipv6cp_InterfaceUp: unable to set ipv6 address\n");
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);
407 ipv6cp_QueueLen(struct ipv6cp *ipv6cp)
413 for (q = ipv6cp->Queue; q < ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp); q++)
420 ipv6cp_PushPacket(struct ipv6cp *ipv6cp, struct link *l)
422 struct bundle *bundle = ipv6cp->fsm.bundle;
423 struct mqueue *queue;
427 unsigned alivesecs = 0;
429 if (ipv6cp->fsm.state != ST_OPENED)
433 * If ccp is not open but is required, do nothing.
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);
440 queue = ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp) - 1;
443 bp = m_dequeue(queue);
444 bp = mbuf_Read(bp, &secs, sizeof secs);
446 m_len = m_length(bp);
447 if (!FilterCheck(MBUF_CTOP(bp), AF_INET6, &bundle->filter.alive,
451 bundle_StartIdleTimer(bundle, secs);
453 link_PushPacket(l, bp, bundle, 0, PROTO_IPV6);
454 ipv6cp_AddOutOctets(ipv6cp, m_len);
457 } while (queue-- != ipv6cp->Queue);
463 ipv6cp_LayerUp(struct fsm *fp)
466 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
469 log_Printf(LogIPV6CP, "%s: LayerUp.\n", fp->link->name);
470 if (!ipv6cp_InterfaceUp(ipv6cp))
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));
477 /* XXX: Call radius_Account() */
479 if (!Enabled(fp->bundle, OPT_IPCP)) {
481 * XXX this stuff should really live in the FSM. Our config should
482 * associate executable sections in files with events.
484 if (system_Select(fp->bundle, tbuff, LINKUPFILE, NULL, NULL) < 0) {
485 if (bundle_GetLabel(fp->bundle)) {
486 if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle),
487 LINKUPFILE, NULL, NULL) < 0)
488 system_Select(fp->bundle, "MYADDR6", LINKUPFILE, NULL, NULL);
490 system_Select(fp->bundle, "MYADDR6", LINKUPFILE, NULL, NULL);
494 fp->more.reqs = fp->more.naks = fp->more.rejs = ipv6cp->cfg.fsm.maxreq * 3;
495 log_DisplayPrompts();
501 ipv6cp_LayerDown(struct fsm *fp)
503 /* About to come down */
504 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
505 static int recursing;
509 snprintf(addr, sizeof addr, "%s", ncpaddr_ntoa(&ipv6cp->myaddr));
510 log_Printf(LogIPV6CP, "%s: LayerDown: %s\n", fp->link->name, addr);
512 /* XXX: Call radius_Account() */
514 if (!Enabled(fp->bundle, OPT_IPCP)) {
516 * XXX this stuff should really live in the FSM. Our config should
517 * associate executable sections in files with events.
519 if (system_Select(fp->bundle, addr, LINKDOWNFILE, NULL, NULL) < 0) {
520 if (bundle_GetLabel(fp->bundle)) {
521 if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle),
522 LINKDOWNFILE, NULL, NULL) < 0)
523 system_Select(fp->bundle, "MYADDR6", LINKDOWNFILE, NULL, NULL);
525 system_Select(fp->bundle, "MYADDR6", LINKDOWNFILE, NULL, NULL);
529 ipv6cp_Setup(ipv6cp);
535 ipv6cp_LayerStart(struct fsm *fp)
537 /* We're about to start up ! */
538 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
540 log_Printf(LogIPV6CP, "%s: LayerStart.\n", fp->link->name);
541 throughput_start(&ipv6cp->throughput, "IPV6CP throughput",
542 Enabled(fp->bundle, OPT_THROUGHPUT));
543 fp->more.reqs = fp->more.naks = fp->more.rejs = ipv6cp->cfg.fsm.maxreq * 3;
544 ipv6cp->peer_tokenreq = 0;
548 ipv6cp_LayerFinish(struct fsm *fp)
551 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
553 log_Printf(LogIPV6CP, "%s: LayerFinish.\n", fp->link->name);
554 throughput_stop(&ipv6cp->throughput);
555 throughput_log(&ipv6cp->throughput, LogIPV6CP, NULL);
559 ipv6cp_InitRestartCounter(struct fsm *fp, int what)
561 /* Set fsm timer load */
562 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
564 fp->FsmTimer.load = ipv6cp->cfg.fsm.timeout * SECTICKS;
567 fp->restart = ipv6cp->cfg.fsm.maxreq;
570 fp->restart = ipv6cp->cfg.fsm.maxtrm;
579 ipv6cp_SendConfigReq(struct fsm *fp)
581 /* Send config REQ please */
582 struct physical *p = link2physical(fp->link);
583 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
584 u_char buff[IPV6CP_IFIDLEN+2];
587 o = (struct fsm_opt *)buff;
589 if ((p && !physical_IsSync(p)) || !REJECTED(ipv6cp, TY_TOKEN)) {
590 memcpy(o->data, ipv6cp->my_ifid, IPV6CP_IFIDLEN);
591 INC_FSM_OPT(TY_TOKEN, IPV6CP_IFIDLEN + 2, o);
594 fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff,
599 ipv6cp_SentTerminateReq(struct fsm *fp __unused)
601 /* Term REQ just sent by FSM */
605 ipv6cp_SendTerminateAck(struct fsm *fp, u_char id)
607 /* Send Term ACK please */
608 fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_IPV6CPOUT);
612 protoname(unsigned proto)
614 static const char *cftypes[] = { "IFACEID", "COMPPROTO" };
616 if (proto > 0 && proto <= NELEM(cftypes))
617 return cftypes[proto - 1];
619 return NumStr(proto, NULL, 0);
623 ipv6cp_ValidateInterfaceID(struct ipv6cp *ipv6cp, u_char *ifid,
624 struct fsm_decode *dec)
627 u_char zero[IPV6CP_IFIDLEN];
629 memset(zero, 0, IPV6CP_IFIDLEN);
631 if (memcmp(ifid, zero, IPV6CP_IFIDLEN) != 0
632 && memcmp(ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) != 0)
633 memcpy(ipv6cp->his_ifid, ifid, IPV6CP_IFIDLEN);
635 opt.hdr.id = TY_TOKEN;
636 opt.hdr.len = IPV6CP_IFIDLEN + 2;
637 memcpy(opt.data, &ipv6cp->his_ifid, IPV6CP_IFIDLEN);
638 if (memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0)
645 ipv6cp_DecodeConfig(struct fsm *fp, u_char *cp, u_char *end, int mode_type,
646 struct fsm_decode *dec)
648 /* Deal with incoming PROTO_IPV6CP */
649 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
652 u_char ifid[IPV6CP_IFIDLEN], zero[IPV6CP_IFIDLEN];
655 memset(zero, 0, IPV6CP_IFIDLEN);
657 while (end - cp >= (int)sizeof(opt->hdr)) {
658 if ((opt = fsm_readopt(&cp)) == NULL)
661 snprintf(tbuff, sizeof tbuff, " %s[%d]", protoname(opt->hdr.id),
664 switch (opt->hdr.id) {
666 memcpy(ifid, opt->data, IPV6CP_IFIDLEN);
667 log_Printf(LogIPV6CP, "%s 0x%02x%02x%02x%02x%02x%02x%02x%02x\n", tbuff,
668 ifid[0], ifid[1], ifid[2], ifid[3], ifid[4], ifid[5], ifid[6], ifid[7]);
672 ipv6cp->peer_tokenreq = 1;
673 ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec);
677 if (memcmp(ifid, zero, IPV6CP_IFIDLEN) == 0) {
678 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE,
679 "0x0000000000000000: Unacceptable IntefaceID!\n");
680 fsm_Close(&ipv6cp->fsm);
681 } else if (memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0) {
682 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE,
683 "0x%02x%02x%02x%02x%02x%02x%02x%02x: "
684 "Unacceptable IntefaceID!\n",
685 ifid[0], ifid[1], ifid[2], ifid[3],
686 ifid[4], ifid[5], ifid[6], ifid[7]);
687 } else if (memcmp(ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) != 0) {
689 while (n && !ipcp_SetIPv6address(ipv6cp, ifid, ipv6cp->his_ifid)) {
692 SetInterfaceID(ifid, 1);
693 } while (n && memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0);
697 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE,
698 "0x0000000000000000: Unacceptable IntefaceID!\n");
699 fsm_Close(&ipv6cp->fsm);
701 log_Printf(LogIPV6CP, "%s changing IntefaceID: "
702 "0x%02x%02x%02x%02x%02x%02x%02x%02x "
703 "--> 0x%02x%02x%02x%02x%02x%02x%02x%02x\n", tbuff,
704 ipv6cp->my_ifid[0], ipv6cp->my_ifid[1],
705 ipv6cp->my_ifid[2], ipv6cp->my_ifid[3],
706 ipv6cp->my_ifid[4], ipv6cp->my_ifid[5],
707 ipv6cp->my_ifid[6], ipv6cp->my_ifid[7],
708 ifid[0], ifid[1], ifid[2], ifid[3],
709 ifid[4], ifid[5], ifid[6], ifid[7]);
710 memcpy(ipv6cp->my_ifid, ifid, IPV6CP_IFIDLEN);
711 bundle_AdjustFilters(fp->bundle, &ipv6cp->myaddr, NULL);
717 ipv6cp->his_reject |= (1 << opt->hdr.id);
723 if (mode_type != MODE_NOP) {
724 ipv6cp->my_reject |= (1 << opt->hdr.id);
731 if (mode_type != MODE_NOP) {
732 if (mode_type == MODE_REQ && !ipv6cp->peer_tokenreq) {
733 if (dec->rejend == dec->rej && dec->nakend == dec->nak) {
735 * Pretend the peer has requested a TOKEN.
736 * We do this to ensure that we only send one NAK if the only
737 * reason for the NAK is because the peer isn't sending a
738 * TY_TOKEN REQ. This stops us from repeatedly trying to tell
739 * the peer that we have to have an IP address on their end.
741 ipv6cp->peer_tokenreq = 1;
743 memset(ifid, 0, IPV6CP_IFIDLEN);
744 ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec);
746 fsm_opt_normalise(dec);