/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2001 Brian Somers * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "layer.h" #include "defs.h" #include "mbuf.h" #include "timer.h" #include "fsm.h" #include "iplist.h" #include "throughput.h" #include "slcompress.h" #include "lqr.h" #include "hdlc.h" #include "lcp.h" #include "ncpaddr.h" #include "ip.h" #include "ipcp.h" #include "ipv6cp.h" #include "filter.h" #include "descriptor.h" #include "ccp.h" #include "link.h" #include "mp.h" #ifndef NORADIUS #include "radius.h" #endif #include "ncp.h" #include "bundle.h" #include "route.h" #include "iface.h" #include "log.h" #include "proto.h" #include "command.h" #include "prompt.h" #include "async.h" #include "physical.h" #include "probe.h" #include "systems.h" #ifndef NOINET6 #define IN6ADDR_LINKLOCAL_MCAST_INIT \ {{{ 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }}} static const struct in6_addr in6addr_linklocal_mcast = IN6ADDR_LINKLOCAL_MCAST_INIT; static int ipv6cp_LayerUp(struct fsm *); static void ipv6cp_LayerDown(struct fsm *); static void ipv6cp_LayerStart(struct fsm *); static void ipv6cp_LayerFinish(struct fsm *); static void ipv6cp_InitRestartCounter(struct fsm *, int); static void ipv6cp_SendConfigReq(struct fsm *); static void ipv6cp_SentTerminateReq(struct fsm *); static void ipv6cp_SendTerminateAck(struct fsm *, u_char); static void ipv6cp_DecodeConfig(struct fsm *, u_char *, u_char *, int, struct fsm_decode *); static struct fsm_callbacks ipv6cp_Callbacks = { ipv6cp_LayerUp, ipv6cp_LayerDown, ipv6cp_LayerStart, ipv6cp_LayerFinish, ipv6cp_InitRestartCounter, ipv6cp_SendConfigReq, ipv6cp_SentTerminateReq, ipv6cp_SendTerminateAck, ipv6cp_DecodeConfig, fsm_NullRecvResetReq, fsm_NullRecvResetAck }; static void SetInterfaceID(u_char *ifid, int userandom) { struct ifaddrs *ifa, *ifap = NULL; struct sockaddr_dl *sdl; const u_long i32_max = 0xffffffff; u_long r1, r2; /* configure an interface ID based on Section 4.1 of RFC 2472 */ memset(ifid, 0, IPV6CP_IFIDLEN); /* * 1) If an IEEE global identifier (EUI-48 or EUI-64) is * available anywhere on the node, it should be used to construct * the tentative Interface-Identifier due to its uniqueness * properties. */ if (userandom) goto randomid; if (getifaddrs(&ifap) < 0) goto randomid; for (ifa = ifap; ifa; ifa = ifa->ifa_next) { char *cp; if (ifa->ifa_addr->sa_family != AF_LINK) continue; sdl = (struct sockaddr_dl *)ifa->ifa_addr; if (sdl->sdl_alen < 6) continue; /* we're only interested in IEEE hardware addresses */ switch(sdl->sdl_type) { case IFT_ETHER: case IFT_FDDI: case IFT_L2VLAN: /* XXX need more cases? */ break; default: continue; } cp = (char *)(sdl->sdl_data + sdl->sdl_nlen); ifid[0] = cp[0]; ifid[0] ^= 0x02; /* reverse the u/l bit*/ ifid[1] = cp[1]; ifid[2] = cp[2]; ifid[3] = 0xff; ifid[4] = 0xfe; ifid[5] = cp[3]; ifid[6] = cp[4]; ifid[7] = cp[5]; freeifaddrs(ifap); return; } freeifaddrs(ifap); /* * 2) If an IEEE global identifier is not available a different source * of uniqueness should be used. * XXX: we skip this case. */ /* * 3) If a good source of uniqueness cannot be found, it is * recommended that a random number be generated. In this case the * "u" bit of the interface identifier MUST be set to zero (0). */ randomid: randinit(); r1 = (((u_long)random()) % i32_max) + 1; r2 = (((u_long)random()) % i32_max) + 1; memcpy(ifid, &r1, sizeof(r1)); memcpy(ifid + 4, &r2, sizeof(r2)); ifid[0] &= 0xfd; return; } static int ipcp_SetIPv6address(struct ipv6cp *ipv6cp, u_char *myifid, u_char *hisifid) { struct bundle *bundle = ipv6cp->fsm.bundle; struct in6_addr myaddr, hisaddr; struct ncprange myrange, range; struct ncpaddr addr; struct sockaddr_storage ssdst, ssgw, ssmask; struct sockaddr *sadst, *sagw, *samask; sadst = (struct sockaddr *)&ssdst; sagw = (struct sockaddr *)&ssgw; samask = (struct sockaddr *)&ssmask; memset(&myaddr, '\0', sizeof myaddr); memset(&hisaddr, '\0', sizeof hisaddr); myaddr.s6_addr[0] = 0xfe; myaddr.s6_addr[1] = 0x80; memcpy(&myaddr.s6_addr[8], myifid, IPV6CP_IFIDLEN); #if 0 myaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */ #endif hisaddr.s6_addr[0] = 0xfe; hisaddr.s6_addr[1] = 0x80; memcpy(&hisaddr.s6_addr[8], hisifid, IPV6CP_IFIDLEN); #if 0 hisaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */ #endif ncpaddr_setip6(&ipv6cp->myaddr, &myaddr); ncpaddr_setip6(&ipv6cp->hisaddr, &hisaddr); ncprange_set(&myrange, &ipv6cp->myaddr, 64); if (!iface_Add(bundle->iface, &bundle->ncp, &myrange, &ipv6cp->hisaddr, IFACE_ADD_FIRST|IFACE_FORCE_ADD|IFACE_SYSTEM)) return 0; if (!Enabled(bundle, OPT_IFACEALIAS)) iface_Clear(bundle->iface, &bundle->ncp, AF_INET6, IFACE_CLEAR_ALIASES|IFACE_SYSTEM); ncpaddr_setip6(&addr, &in6addr_linklocal_mcast); ncprange_set(&range, &addr, 32); rt_Set(bundle, RTM_ADD, &range, &ipv6cp->myaddr, 1, 0); if (bundle->ncp.cfg.sendpipe > 0 || bundle->ncp.cfg.recvpipe > 0) { ncprange_getsa(&myrange, &ssgw, &ssmask); if (ncpaddr_isset(&ipv6cp->hisaddr)) ncpaddr_getsa(&ipv6cp->hisaddr, &ssdst); else sadst = NULL; rt_Update(bundle, sadst, sagw, samask, NULL, NULL); } if (Enabled(bundle, OPT_SROUTES)) route_Change(bundle, bundle->ncp.route, &ipv6cp->myaddr, &ipv6cp->hisaddr); #ifndef NORADIUS if (bundle->radius.valid) route_Change(bundle, bundle->radius.ipv6routes, &ipv6cp->myaddr, &ipv6cp->hisaddr); #endif return 1; /* Ok */ } void ipv6cp_Init(struct ipv6cp *ipv6cp, struct bundle *bundle, struct link *l, const struct fsm_parent *parent) { static const char * const timer_names[] = {"IPV6CP restart", "IPV6CP openmode", "IPV6CP stopped"}; int n; fsm_Init(&ipv6cp->fsm, "IPV6CP", PROTO_IPV6CP, 1, IPV6CP_MAXCODE, LogIPV6CP, bundle, l, parent, &ipv6cp_Callbacks, timer_names); ipv6cp->cfg.fsm.timeout = DEF_FSMRETRY; ipv6cp->cfg.fsm.maxreq = DEF_FSMTRIES; ipv6cp->cfg.fsm.maxtrm = DEF_FSMTRIES; SetInterfaceID(ipv6cp->my_ifid, 0); do { SetInterfaceID(ipv6cp->his_ifid, 1); } while (memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0); if (probe.ipv6_available) { n = 100; while (n && !ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) { do { n--; SetInterfaceID(ipv6cp->my_ifid, 1); } while (n && memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0); } } throughput_init(&ipv6cp->throughput, SAMPLE_PERIOD); memset(ipv6cp->Queue, '\0', sizeof ipv6cp->Queue); ipv6cp_Setup(ipv6cp); } void ipv6cp_Destroy(struct ipv6cp *ipv6cp) { throughput_destroy(&ipv6cp->throughput); } void ipv6cp_Setup(struct ipv6cp *ipv6cp) { ncpaddr_init(&ipv6cp->myaddr); ncpaddr_init(&ipv6cp->hisaddr); ipv6cp->his_reject = 0; ipv6cp->my_reject = 0; } void ipv6cp_SetLink(struct ipv6cp *ipv6cp, struct link *l) { ipv6cp->fsm.link = l; } int ipv6cp_Show(struct cmdargs const *arg) { struct ipv6cp *ipv6cp = &arg->bundle->ncp.ipv6cp; prompt_Printf(arg->prompt, "%s [%s]\n", ipv6cp->fsm.name, State2Nam(ipv6cp->fsm.state)); if (ipv6cp->fsm.state == ST_OPENED) { prompt_Printf(arg->prompt, " His side: %s\n", ncpaddr_ntoa(&ipv6cp->hisaddr)); prompt_Printf(arg->prompt, " My side: %s\n", ncpaddr_ntoa(&ipv6cp->myaddr)); prompt_Printf(arg->prompt, " Queued packets: %lu\n", (unsigned long)ipv6cp_QueueLen(ipv6cp)); } prompt_Printf(arg->prompt, "\nDefaults:\n"); prompt_Printf(arg->prompt, " FSM retry = %us, max %u Config" " REQ%s, %u Term REQ%s\n\n", ipv6cp->cfg.fsm.timeout, ipv6cp->cfg.fsm.maxreq, ipv6cp->cfg.fsm.maxreq == 1 ? "" : "s", ipv6cp->cfg.fsm.maxtrm, ipv6cp->cfg.fsm.maxtrm == 1 ? "" : "s"); throughput_disp(&ipv6cp->throughput, arg->prompt); return 0; } struct mbuf * ipv6cp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp) { /* Got PROTO_IPV6CP from link */ m_settype(bp, MB_IPV6CPIN); if (bundle_Phase(bundle) == PHASE_NETWORK) fsm_Input(&bundle->ncp.ipv6cp.fsm, bp); else { if (bundle_Phase(bundle) < PHASE_NETWORK) log_Printf(LogIPV6CP, "%s: Error: Unexpected IPV6CP in phase %s" " (ignored)\n", l->name, bundle_PhaseName(bundle)); m_freem(bp); } return NULL; } void ipv6cp_AddInOctets(struct ipv6cp *ipv6cp, int n) { throughput_addin(&ipv6cp->throughput, n); } void ipv6cp_AddOutOctets(struct ipv6cp *ipv6cp, int n) { throughput_addout(&ipv6cp->throughput, n); } void ipv6cp_IfaceAddrAdded(struct ipv6cp *ipv6cp __unused, const struct iface_addr *addr __unused) { } void ipv6cp_IfaceAddrDeleted(struct ipv6cp *ipv6cp __unused, const struct iface_addr *addr __unused) { } int ipv6cp_InterfaceUp(struct ipv6cp *ipv6cp) { if (!ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) { log_Printf(LogERROR, "ipv6cp_InterfaceUp: unable to set ipv6 address\n"); return 0; } if (!iface_SetFlags(ipv6cp->fsm.bundle->iface->name, IFF_UP)) { log_Printf(LogERROR, "ipv6cp_InterfaceUp: Can't set the IFF_UP" " flag on %s\n", ipv6cp->fsm.bundle->iface->name); return 0; } return 1; } size_t ipv6cp_QueueLen(struct ipv6cp *ipv6cp) { struct mqueue *q; size_t result; result = 0; for (q = ipv6cp->Queue; q < ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp); q++) result += q->len; return result; } int ipv6cp_PushPacket(struct ipv6cp *ipv6cp, struct link *l) { struct bundle *bundle = ipv6cp->fsm.bundle; struct mqueue *queue; struct mbuf *bp; int m_len; u_int32_t secs = 0; unsigned alivesecs = 0; if (ipv6cp->fsm.state != ST_OPENED) return 0; /* * If ccp is not open but is required, do nothing. */ if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) { log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name); return 0; } queue = ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp) - 1; do { if (queue->top) { bp = m_dequeue(queue); bp = mbuf_Read(bp, &secs, sizeof secs); bp = m_pullup(bp); m_len = m_length(bp); if (!FilterCheck(MBUF_CTOP(bp), AF_INET6, &bundle->filter.alive, &alivesecs)) { if (secs == 0) secs = alivesecs; bundle_StartIdleTimer(bundle, secs); } link_PushPacket(l, bp, bundle, 0, PROTO_IPV6); ipv6cp_AddOutOctets(ipv6cp, m_len); return 1; } } while (queue-- != ipv6cp->Queue); return 0; } static int ipv6cp_LayerUp(struct fsm *fp) { /* We're now up */ struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); char tbuff[NCP_ASCIIBUFFERSIZE]; log_Printf(LogIPV6CP, "%s: LayerUp.\n", fp->link->name); if (!ipv6cp_InterfaceUp(ipv6cp)) return 0; snprintf(tbuff, sizeof tbuff, "%s", ncpaddr_ntoa(&ipv6cp->myaddr)); log_Printf(LogIPV6CP, "myaddr %s hisaddr = %s\n", tbuff, ncpaddr_ntoa(&ipv6cp->hisaddr)); #ifndef NORADIUS radius_Account_Set_Ipv6(&fp->bundle->radacct6, ipv6cp->his_ifid); radius_Account(&fp->bundle->radius, &fp->bundle->radacct6, fp->bundle->links, RAD_START, &ipv6cp->throughput); /* * XXX: Avoid duplicate evaluation of filterid between IPCP and * IPV6CP. When IPCP is enabled and rejected, filterid is not * evaluated. */ if (!Enabled(fp->bundle, OPT_IPCP)) { if (*fp->bundle->radius.cfg.file && fp->bundle->radius.filterid) system_Select(fp->bundle, fp->bundle->radius.filterid, LINKUPFILE, NULL, NULL); } #endif /* * XXX this stuff should really live in the FSM. Our config should * associate executable sections in files with events. */ if (system_Select(fp->bundle, tbuff, LINKUPFILE, NULL, NULL) < 0) { /* * XXX: Avoid duplicate evaluation of label between IPCP and * IPV6CP. When IPCP is enabled and rejected, label is not * evaluated. */ if (bundle_GetLabel(fp->bundle) && !Enabled(fp->bundle, OPT_IPCP)) { if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle), LINKUPFILE, NULL, NULL) < 0) system_Select(fp->bundle, "MYADDR6", LINKUPFILE, NULL, NULL); } else system_Select(fp->bundle, "MYADDR6", LINKUPFILE, NULL, NULL); } fp->more.reqs = fp->more.naks = fp->more.rejs = ipv6cp->cfg.fsm.maxreq * 3; log_DisplayPrompts(); return 1; } static void ipv6cp_LayerDown(struct fsm *fp) { /* About to come down */ struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); static int recursing; char addr[NCP_ASCIIBUFFERSIZE]; if (!recursing++) { snprintf(addr, sizeof addr, "%s", ncpaddr_ntoa(&ipv6cp->myaddr)); log_Printf(LogIPV6CP, "%s: LayerDown: %s\n", fp->link->name, addr); #ifndef NORADIUS radius_Flush(&fp->bundle->radius); radius_Account(&fp->bundle->radius, &fp->bundle->radacct6, fp->bundle->links, RAD_STOP, &ipv6cp->throughput); /* * XXX: Avoid duplicate evaluation of filterid between IPCP and * IPV6CP. When IPCP is enabled and rejected, filterid is not * evaluated. */ if (!Enabled(fp->bundle, OPT_IPCP)) { if (*fp->bundle->radius.cfg.file && fp->bundle->radius.filterid) system_Select(fp->bundle, fp->bundle->radius.filterid, LINKDOWNFILE, NULL, NULL); } #endif /* * XXX this stuff should really live in the FSM. Our config should * associate executable sections in files with events. */ if (system_Select(fp->bundle, addr, LINKDOWNFILE, NULL, NULL) < 0) { /* * XXX: Avoid duplicate evaluation of label between IPCP and * IPV6CP. When IPCP is enabled and rejected, label is not * evaluated. */ if (bundle_GetLabel(fp->bundle) && !Enabled(fp->bundle, OPT_IPCP)) { if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle), LINKDOWNFILE, NULL, NULL) < 0) system_Select(fp->bundle, "MYADDR6", LINKDOWNFILE, NULL, NULL); } else system_Select(fp->bundle, "MYADDR6", LINKDOWNFILE, NULL, NULL); } ipv6cp_Setup(ipv6cp); } recursing--; } static void ipv6cp_LayerStart(struct fsm *fp) { /* We're about to start up ! */ struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); log_Printf(LogIPV6CP, "%s: LayerStart.\n", fp->link->name); throughput_start(&ipv6cp->throughput, "IPV6CP throughput", Enabled(fp->bundle, OPT_THROUGHPUT)); fp->more.reqs = fp->more.naks = fp->more.rejs = ipv6cp->cfg.fsm.maxreq * 3; ipv6cp->peer_tokenreq = 0; } static void ipv6cp_LayerFinish(struct fsm *fp) { /* We're now down */ struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); log_Printf(LogIPV6CP, "%s: LayerFinish.\n", fp->link->name); throughput_stop(&ipv6cp->throughput); throughput_log(&ipv6cp->throughput, LogIPV6CP, NULL); } static void ipv6cp_InitRestartCounter(struct fsm *fp, int what) { /* Set fsm timer load */ struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); fp->FsmTimer.load = ipv6cp->cfg.fsm.timeout * SECTICKS; switch (what) { case FSM_REQ_TIMER: fp->restart = ipv6cp->cfg.fsm.maxreq; break; case FSM_TRM_TIMER: fp->restart = ipv6cp->cfg.fsm.maxtrm; break; default: fp->restart = 1; break; } } static void ipv6cp_SendConfigReq(struct fsm *fp) { /* Send config REQ please */ struct physical *p = link2physical(fp->link); struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); u_char buff[IPV6CP_IFIDLEN+2]; struct fsm_opt *o; o = (struct fsm_opt *)buff; if ((p && !physical_IsSync(p)) || !REJECTED(ipv6cp, TY_TOKEN)) { memcpy(o->data, ipv6cp->my_ifid, IPV6CP_IFIDLEN); INC_FSM_OPT(TY_TOKEN, IPV6CP_IFIDLEN + 2, o); } fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff, MB_IPV6CPOUT); } static void ipv6cp_SentTerminateReq(struct fsm *fp __unused) { /* Term REQ just sent by FSM */ } static void ipv6cp_SendTerminateAck(struct fsm *fp, u_char id) { /* Send Term ACK please */ fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_IPV6CPOUT); } static const char * protoname(unsigned proto) { static const char *cftypes[] = { "IFACEID", "COMPPROTO" }; if (proto > 0 && proto <= sizeof cftypes / sizeof *cftypes) return cftypes[proto - 1]; return NumStr(proto, NULL, 0); } static void ipv6cp_ValidateInterfaceID(struct ipv6cp *ipv6cp, u_char *ifid, struct fsm_decode *dec) { struct fsm_opt opt; u_char zero[IPV6CP_IFIDLEN]; memset(zero, 0, IPV6CP_IFIDLEN); if (memcmp(ifid, zero, IPV6CP_IFIDLEN) != 0 && memcmp(ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) != 0) memcpy(ipv6cp->his_ifid, ifid, IPV6CP_IFIDLEN); opt.hdr.id = TY_TOKEN; opt.hdr.len = IPV6CP_IFIDLEN + 2; memcpy(opt.data, &ipv6cp->his_ifid, IPV6CP_IFIDLEN); if (memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0) fsm_ack(dec, &opt); else fsm_nak(dec, &opt); } static void ipv6cp_DecodeConfig(struct fsm *fp, u_char *cp, u_char *end, int mode_type, struct fsm_decode *dec) { /* Deal with incoming PROTO_IPV6CP */ struct ipv6cp *ipv6cp = fsm2ipv6cp(fp); int n; char tbuff[100]; u_char ifid[IPV6CP_IFIDLEN], zero[IPV6CP_IFIDLEN]; struct fsm_opt *opt; memset(zero, 0, IPV6CP_IFIDLEN); while (end - cp >= (int)sizeof(opt->hdr)) { if ((opt = fsm_readopt(&cp)) == NULL) break; snprintf(tbuff, sizeof tbuff, " %s[%d]", protoname(opt->hdr.id), opt->hdr.len); switch (opt->hdr.id) { case TY_TOKEN: memcpy(ifid, opt->data, IPV6CP_IFIDLEN); log_Printf(LogIPV6CP, "%s 0x%02x%02x%02x%02x%02x%02x%02x%02x\n", tbuff, ifid[0], ifid[1], ifid[2], ifid[3], ifid[4], ifid[5], ifid[6], ifid[7]); switch (mode_type) { case MODE_REQ: ipv6cp->peer_tokenreq = 1; ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec); break; case MODE_NAK: if (memcmp(ifid, zero, IPV6CP_IFIDLEN) == 0) { log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, "0x0000000000000000: Unacceptable IntefaceID!\n"); fsm_Close(&ipv6cp->fsm); } else if (memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0) { log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, "0x%02x%02x%02x%02x%02x%02x%02x%02x: " "Unacceptable IntefaceID!\n", ifid[0], ifid[1], ifid[2], ifid[3], ifid[4], ifid[5], ifid[6], ifid[7]); } else if (memcmp(ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) != 0) { n = 100; while (n && !ipcp_SetIPv6address(ipv6cp, ifid, ipv6cp->his_ifid)) { do { n--; SetInterfaceID(ifid, 1); } while (n && memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0); } if (n == 0) { log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE, "0x0000000000000000: Unacceptable IntefaceID!\n"); fsm_Close(&ipv6cp->fsm); } else { log_Printf(LogIPV6CP, "%s changing IntefaceID: " "0x%02x%02x%02x%02x%02x%02x%02x%02x " "--> 0x%02x%02x%02x%02x%02x%02x%02x%02x\n", tbuff, ipv6cp->my_ifid[0], ipv6cp->my_ifid[1], ipv6cp->my_ifid[2], ipv6cp->my_ifid[3], ipv6cp->my_ifid[4], ipv6cp->my_ifid[5], ipv6cp->my_ifid[6], ipv6cp->my_ifid[7], ifid[0], ifid[1], ifid[2], ifid[3], ifid[4], ifid[5], ifid[6], ifid[7]); memcpy(ipv6cp->my_ifid, ifid, IPV6CP_IFIDLEN); bundle_AdjustFilters(fp->bundle, &ipv6cp->myaddr, NULL); } } break; case MODE_REJ: ipv6cp->his_reject |= (1 << opt->hdr.id); break; } break; default: if (mode_type != MODE_NOP) { ipv6cp->my_reject |= (1 << opt->hdr.id); fsm_rej(dec, opt); } break; } } if (mode_type != MODE_NOP) { if (mode_type == MODE_REQ && !ipv6cp->peer_tokenreq) { if (dec->rejend == dec->rej && dec->nakend == dec->nak) { /* * Pretend the peer has requested a TOKEN. * We do this to ensure that we only send one NAK if the only * reason for the NAK is because the peer isn't sending a * TY_TOKEN REQ. This stops us from repeatedly trying to tell * the peer that we have to have an IP address on their end. */ ipv6cp->peer_tokenreq = 1; } memset(ifid, 0, IPV6CP_IFIDLEN); ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec); } fsm_opt_normalise(dec); } } #endif