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
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"
84 static int ipv6cp_LayerUp(struct fsm *);
85 static void ipv6cp_LayerDown(struct fsm *);
86 static void ipv6cp_LayerStart(struct fsm *);
87 static void ipv6cp_LayerFinish(struct fsm *);
88 static void ipv6cp_InitRestartCounter(struct fsm *, int);
89 static void ipv6cp_SendConfigReq(struct fsm *);
90 static void ipv6cp_SentTerminateReq(struct fsm *);
91 static void ipv6cp_SendTerminateAck(struct fsm *, u_char);
92 static void ipv6cp_DecodeConfig(struct fsm *, u_char *, u_char *, int,
95 static struct fsm_callbacks ipv6cp_Callbacks = {
100 ipv6cp_InitRestartCounter,
101 ipv6cp_SendConfigReq,
102 ipv6cp_SentTerminateReq,
103 ipv6cp_SendTerminateAck,
105 fsm_NullRecvResetReq,
110 SetInterfaceID(u_char *ifid, int userandom)
112 struct ifaddrs *ifa, *ifap = NULL;
113 struct sockaddr_dl *sdl;
114 const u_long i32_max = 0xffffffff;
117 /* configure an interface ID based on Section 4.1 of RFC 2472 */
118 memset(ifid, 0, IPV6CP_IFIDLEN);
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
128 if (getifaddrs(&ifap) < 0)
131 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
134 if (ifa->ifa_addr->sa_family != AF_LINK)
137 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
138 if (sdl->sdl_alen < 6)
140 /* we're only interested in IEEE hardware addresses */
141 switch(sdl->sdl_type) {
144 /* XXX need more cases? */
150 cp = (char *)(sdl->sdl_data + sdl->sdl_nlen);
152 ifid[0] ^= 0x02; /* reverse the u/l bit*/
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.
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).
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));
189 ipcp_SetIPv6address(struct ipv6cp *ipv6cp, u_char *myifid, u_char *hisifid)
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;
197 sadst = (struct sockaddr *)&ssdst;
198 sagw = (struct sockaddr *)&ssgw;
199 samask = (struct sockaddr *)&ssmask;
201 memset(&myaddr, '\0', sizeof myaddr);
202 memset(&hisaddr, '\0', sizeof hisaddr);
204 myaddr.s6_addr[0] = 0xfe;
205 myaddr.s6_addr[1] = 0x80;
206 memcpy(&myaddr.s6_addr[8], myifid, IPV6CP_IFIDLEN);
208 myaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */
211 hisaddr.s6_addr[0] = 0xfe;
212 hisaddr.s6_addr[1] = 0x80;
213 memcpy(&hisaddr.s6_addr[8], hisifid, IPV6CP_IFIDLEN);
215 hisaddr.s6_addr[8] |= 0x02; /* set 'universal' bit */
218 ncpaddr_setip6(&ipv6cp->myaddr, &myaddr);
219 ncpaddr_setip6(&ipv6cp->hisaddr, &hisaddr);
220 ncprange_sethost(&myrange, &ipv6cp->myaddr);
222 if (!iface_Add(bundle->iface, &bundle->ncp, &myrange, &ipv6cp->hisaddr,
223 IFACE_ADD_FIRST|IFACE_FORCE_ADD|IFACE_SYSTEM))
226 if (!Enabled(bundle, OPT_IFACEALIAS))
227 iface_Clear(bundle->iface, &bundle->ncp, AF_INET6,
228 IFACE_CLEAR_ALIASES|IFACE_SYSTEM);
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);
236 rt_Update(bundle, sadst, sagw, samask);
239 if (Enabled(bundle, OPT_SROUTES))
240 route_Change(bundle, bundle->ncp.route, &ipv6cp->myaddr, &ipv6cp->hisaddr);
243 if (bundle->radius.valid)
244 route_Change(bundle, bundle->radius.routes, &ipv6cp->myaddr,
252 ipv6cp_Init(struct ipv6cp *ipv6cp, struct bundle *bundle, struct link *l,
253 const struct fsm_parent *parent)
255 static const char * const timer_names[] =
256 {"IPV6CP restart", "IPV6CP openmode", "IPV6CP stopped"};
259 fsm_Init(&ipv6cp->fsm, "IPV6CP", PROTO_IPV6CP, 1, IPV6CP_MAXCODE, LogIPV6CP,
260 bundle, l, parent, &ipv6cp_Callbacks, timer_names);
262 ipv6cp->cfg.fsm.timeout = DEF_FSMRETRY;
263 ipv6cp->cfg.fsm.maxreq = DEF_FSMTRIES;
264 ipv6cp->cfg.fsm.maxtrm = DEF_FSMTRIES;
266 SetInterfaceID(ipv6cp->my_ifid, 0);
268 SetInterfaceID(ipv6cp->his_ifid, 1);
269 } while (memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0);
271 if (probe.ipv6_available) {
274 !ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) {
277 SetInterfaceID(ipv6cp->my_ifid, 1);
279 && memcmp(ipv6cp->his_ifid, ipv6cp->my_ifid, IPV6CP_IFIDLEN) == 0);
283 throughput_init(&ipv6cp->throughput, SAMPLE_PERIOD);
284 memset(ipv6cp->Queue, '\0', sizeof ipv6cp->Queue);
285 ipv6cp_Setup(ipv6cp);
289 ipv6cp_Destroy(struct ipv6cp *ipv6cp)
291 throughput_destroy(&ipv6cp->throughput);
295 ipv6cp_Setup(struct ipv6cp *ipv6cp)
297 ncpaddr_init(&ipv6cp->myaddr);
298 ncpaddr_init(&ipv6cp->hisaddr);
300 ipv6cp->his_reject = 0;
301 ipv6cp->my_reject = 0;
305 ipv6cp_SetLink(struct ipv6cp *ipv6cp, struct link *l)
307 ipv6cp->fsm.link = l;
311 ipv6cp_Show(struct cmdargs const *arg)
313 struct ipv6cp *ipv6cp = &arg->bundle->ncp.ipv6cp;
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));
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");
332 throughput_disp(&ipv6cp->throughput, arg->prompt);
338 ipv6cp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
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);
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));
354 ipv6cp_AddInOctets(struct ipv6cp *ipv6cp, int n)
356 throughput_addin(&ipv6cp->throughput, n);
360 ipv6cp_AddOutOctets(struct ipv6cp *ipv6cp, int n)
362 throughput_addout(&ipv6cp->throughput, n);
366 ipv6cp_IfaceAddrAdded(struct ipv6cp *ipv6cp, const struct iface_addr *addr)
371 ipv6cp_IfaceAddrDeleted(struct ipv6cp *ipv6cp, const struct iface_addr *addr)
376 ipv6cp_InterfaceUp(struct ipv6cp *ipv6cp)
378 if (!ipcp_SetIPv6address(ipv6cp, ipv6cp->my_ifid, ipv6cp->his_ifid)) {
379 log_Printf(LogERROR, "ipv6cp_InterfaceUp: unable to set ipv6 address\n");
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);
393 ipv6cp_QueueLen(struct ipv6cp *ipv6cp)
399 for (q = ipv6cp->Queue; q < ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp); q++)
406 ipv6cp_PushPacket(struct ipv6cp *ipv6cp, struct link *l)
408 struct bundle *bundle = ipv6cp->fsm.bundle;
409 struct mqueue *queue;
413 unsigned alivesecs = 0;
415 if (ipv6cp->fsm.state != ST_OPENED)
419 * If ccp is not open but is required, do nothing.
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);
426 queue = ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp) - 1;
429 bp = m_dequeue(queue);
430 bp = mbuf_Read(bp, &secs, sizeof secs);
432 m_len = m_length(bp);
433 if (!FilterCheck(MBUF_CTOP(bp), AF_INET6, &bundle->filter.alive,
437 bundle_StartIdleTimer(bundle, secs);
439 link_PushPacket(l, bp, bundle, 0, PROTO_IPV6);
440 ipv6cp_AddOutOctets(ipv6cp, m_len);
443 } while (queue-- != ipv6cp->Queue);
449 ipv6cp_LayerUp(struct fsm *fp)
452 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
455 log_Printf(LogIPV6CP, "%s: LayerUp.\n", fp->link->name);
456 if (!ipv6cp_InterfaceUp(ipv6cp))
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));
463 /* XXX: Call radius_Account() and system_Select() */
465 fp->more.reqs = fp->more.naks = fp->more.rejs = ipv6cp->cfg.fsm.maxreq * 3;
466 log_DisplayPrompts();
472 ipv6cp_LayerDown(struct fsm *fp)
474 /* About to come down */
475 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
476 static int recursing;
480 snprintf(addr, sizeof addr, "%s", ncpaddr_ntoa(&ipv6cp->myaddr));
481 log_Printf(LogIPV6CP, "%s: LayerDown: %s\n", fp->link->name, addr);
483 /* XXX: Call radius_Account() and system_Select() */
485 ipv6cp_Setup(ipv6cp);
491 ipv6cp_LayerStart(struct fsm *fp)
493 /* We're about to start up ! */
494 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
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;
504 ipv6cp_LayerFinish(struct fsm *fp)
507 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
509 log_Printf(LogIPV6CP, "%s: LayerFinish.\n", fp->link->name);
510 throughput_stop(&ipv6cp->throughput);
511 throughput_log(&ipv6cp->throughput, LogIPV6CP, NULL);
515 ipv6cp_InitRestartCounter(struct fsm *fp, int what)
517 /* Set fsm timer load */
518 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
520 fp->FsmTimer.load = ipv6cp->cfg.fsm.timeout * SECTICKS;
523 fp->restart = ipv6cp->cfg.fsm.maxreq;
526 fp->restart = ipv6cp->cfg.fsm.maxtrm;
535 ipv6cp_SendConfigReq(struct fsm *fp)
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];
543 o = (struct fsm_opt *)buff;
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);
550 fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff,
555 ipv6cp_SentTerminateReq(struct fsm *fp)
557 /* Term REQ just sent by FSM */
561 ipv6cp_SendTerminateAck(struct fsm *fp, u_char id)
563 /* Send Term ACK please */
564 fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_IPV6CPOUT);
570 static const char *cftypes[] = { "IFACEID", "COMPPROTO" };
572 if (proto > 0 && proto <= sizeof cftypes / sizeof *cftypes)
573 return cftypes[proto - 1];
575 return NumStr(proto, NULL, 0);
579 ipv6cp_ValidateInterfaceID(struct ipv6cp *ipv6cp, u_char *ifid,
580 struct fsm_decode *dec)
583 u_char zero[IPV6CP_IFIDLEN];
585 memset(zero, 0, IPV6CP_IFIDLEN);
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);
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)
601 ipv6cp_DecodeConfig(struct fsm *fp, u_char *cp, u_char *end, int mode_type,
602 struct fsm_decode *dec)
604 /* Deal with incoming PROTO_IPV6CP */
605 struct ipv6cp *ipv6cp = fsm2ipv6cp(fp);
608 u_char ifid[IPV6CP_IFIDLEN], zero[IPV6CP_IFIDLEN];
611 memset(zero, 0, IPV6CP_IFIDLEN);
613 while (end - cp >= sizeof(opt->hdr)) {
614 if ((opt = fsm_readopt(&cp)) == NULL)
617 snprintf(tbuff, sizeof tbuff, " %s[%d]", protoname(opt->hdr.id),
620 switch (opt->hdr.id) {
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]);
628 ipv6cp->peer_tokenreq = 1;
629 ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec);
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) {
645 while (n && !ipcp_SetIPv6address(ipv6cp, ifid, ipv6cp->his_ifid)) {
648 SetInterfaceID(ifid, 1);
649 } while (n && memcmp(ifid, ipv6cp->his_ifid, IPV6CP_IFIDLEN) == 0);
653 log_Printf(log_IsKept(LogIPV6CP) ? LogIPV6CP : LogPHASE,
654 "0x0000000000000000: Unacceptable IntefaceID!\n");
655 fsm_Close(&ipv6cp->fsm);
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);
673 ipv6cp->his_reject |= (1 << opt->hdr.id);
679 if (mode_type != MODE_NOP) {
680 ipv6cp->my_reject |= (1 << opt->hdr.id);
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) {
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.
697 ipv6cp->peer_tokenreq = 1;
699 memset(ifid, 0, IPV6CP_IFIDLEN);
700 ipv6cp_ValidateInterfaceID(ipv6cp, ifid, dec);
702 fsm_opt_normalise(dec);