2 /* $KAME: route6d.c,v 1.104 2003/10/31 00:30:20 itojun Exp $ */
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 static const char _rcsid[] = "$KAME: route6d.c,v 1.104 2003/10/31 00:30:20 itojun Exp $";
58 #include <sys/types.h>
59 #include <sys/param.h>
61 #include <sys/socket.h>
62 #include <sys/ioctl.h>
63 #include <sys/sysctl.h>
66 #include <net/if_var.h>
67 #include <net/route.h>
68 #include <netinet/in.h>
69 #include <netinet/in_var.h>
70 #include <netinet/ip6.h>
71 #include <netinet/udp.h>
75 #include <arpa/inet.h>
80 #define RT_DUMP_MAXRETRY 15
83 #define INIT_INTERVAL6 6
85 #define INIT_INTERVAL6 10 /* Wait to submit an initial riprequest */
88 /* alignment constraint for routing socket */
90 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
91 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
93 struct ifc { /* Configuration of an interface */
94 TAILQ_ENTRY(ifc) ifc_next;
96 char ifc_name[IFNAMSIZ]; /* if name */
97 int ifc_index; /* if index */
98 int ifc_mtu; /* if mtu */
99 int ifc_metric; /* if metric */
100 u_int ifc_flags; /* flags */
101 short ifc_cflags; /* IFC_XXX */
102 struct in6_addr ifc_mylladdr; /* my link-local address */
103 struct sockaddr_in6 ifc_ripsin; /* rip multicast address */
104 TAILQ_HEAD(, ifac) ifc_ifac_head; /* list of AF_INET6 addrs */
105 TAILQ_HEAD(, iff) ifc_iff_head; /* list of filters */
106 int ifc_joined; /* joined to ff02::9 */
108 TAILQ_HEAD(, ifc) ifc_head = TAILQ_HEAD_INITIALIZER(ifc_head);
110 struct ifac { /* Adddress associated to an interface */
111 TAILQ_ENTRY(ifac) ifac_next;
113 struct ifc *ifac_ifc; /* back pointer */
114 struct in6_addr ifac_addr; /* address */
115 struct in6_addr ifac_raddr; /* remote address, valid in p2p */
116 int ifac_scope_id; /* scope id */
117 int ifac_plen; /* prefix length */
120 struct iff { /* Filters for an interface */
121 TAILQ_ENTRY(iff) iff_next;
124 struct in6_addr iff_addr;
128 struct ifc **index2ifc;
129 unsigned int nindex2ifc;
130 struct ifc *loopifcp = NULL; /* pointing to loopback */
132 struct pollfd set[2];
134 fd_set *sockvecp; /* vector to select() for receiving */
137 int maxfd; /* maximum fd for select() */
139 int rtsock; /* the routing socket */
140 int ripsock; /* socket to send/receive RIP datagram */
142 struct rip6 *ripbuf; /* packet buffer for sending */
145 * Maintain the routes in a linked list. When the number of the routes
146 * grows, somebody would like to introduce a hash based or a radix tree
147 * based structure. I believe the number of routes handled by RIP is
148 * limited and I don't have to manage a complex data structure, however.
150 * One of the major drawbacks of the linear linked list is the difficulty
151 * of representing the relationship between a couple of routes. This may
152 * be a significant problem when we have to support route aggregation with
153 * suppressing the specifics covered by the aggregate.
157 TAILQ_ENTRY(riprt) rrt_next; /* next destination */
159 struct riprt *rrt_same; /* same destination - future use */
160 struct netinfo6 rrt_info; /* network info */
161 struct in6_addr rrt_gw; /* gateway */
162 u_long rrt_flags; /* kernel routing table flags */
163 u_long rrt_rflags; /* route6d routing table flags */
164 time_t rrt_t; /* when the route validated */
165 int rrt_index; /* ifindex from which this route got */
167 TAILQ_HEAD(, riprt) riprt_head = TAILQ_HEAD_INITIALIZER(riprt_head);
169 int dflag = 0; /* debug flag */
170 int qflag = 0; /* quiet flag */
171 int nflag = 0; /* don't update kernel routing table */
172 int aflag = 0; /* age out even the statically defined routes */
173 int hflag = 0; /* don't split horizon */
174 int lflag = 0; /* exchange site local routes */
175 int Pflag = 0; /* don't age out routes with RTF_PROTO[123] */
176 int Qflag = RTF_PROTO2; /* set RTF_PROTO[123] flag to routes by RIPng */
177 int sflag = 0; /* announce static routes w/ split horizon */
178 int Sflag = 0; /* announce static routes to every interface */
179 unsigned long routetag = 0; /* route tag attached on originating case */
181 char *filter[MAXFILTER];
182 int filtertype[MAXFILTER];
187 struct sockaddr_storage ripsin;
190 time_t nextalarm = 0;
191 time_t sup_trig_update = 0;
199 volatile sig_atomic_t seenalrm;
200 volatile sig_atomic_t seenquit;
201 volatile sig_atomic_t seenusr1;
203 #define RRTF_AGGREGATE 0x08000000
204 #define RRTF_NOADVERTISE 0x10000000
205 #define RRTF_NH_NOT_LLADDR 0x20000000
206 #define RRTF_SENDANYWAY 0x40000000
207 #define RRTF_CHANGED 0x80000000
209 int main(int, char **);
210 void sighandler(int);
213 void ripsend(struct ifc *, struct sockaddr_in6 *, int);
214 int out_filter(struct riprt *, struct ifc *);
216 void sockopt(struct ifc *);
218 int ifconfig1(const char *, const struct sockaddr *, struct ifc *, int);
220 int rt_del(const struct sockaddr_in6 *, const struct sockaddr_in6 *,
221 const struct sockaddr_in6 *);
222 int rt_deladdr(struct ifc *, const struct sockaddr_in6 *,
223 const struct sockaddr_in6 *);
224 void filterconfig(void);
226 const char *rttypes(struct rt_msghdr *);
227 const char *rtflags(struct rt_msghdr *);
228 const char *ifflags(int);
229 int ifrt(struct ifc *, int);
230 void ifrt_p2p(struct ifc *, int);
231 void applymask(struct in6_addr *, struct in6_addr *);
232 void applyplen(struct in6_addr *, int);
235 void ifdump0(FILE *, const struct ifc *);
238 void rt_entry(struct rt_msghdr *, int);
240 void riprequest(struct ifc *, struct netinfo6 *, int,
241 struct sockaddr_in6 *);
242 void ripflush(struct ifc *, struct sockaddr_in6 *, int, struct netinfo6 *np);
243 void sendrequest(struct ifc *);
244 int sin6mask2len(const struct sockaddr_in6 *);
245 int mask2len(const struct in6_addr *, int);
246 int sendpacket(struct sockaddr_in6 *, int);
247 int addroute(struct riprt *, const struct in6_addr *, struct ifc *);
248 int delroute(struct netinfo6 *, struct in6_addr *);
249 struct in6_addr *getroute(struct netinfo6 *, struct in6_addr *);
251 int tobeadv(struct riprt *, struct ifc *);
252 char *allocopy(char *);
254 const char *inet6_n2p(const struct in6_addr *);
255 struct ifac *ifa_match(const struct ifc *, const struct in6_addr *, int);
256 struct in6_addr *plen2mask(int);
257 struct riprt *rtsearch(struct netinfo6 *);
258 int ripinterval(int);
259 time_t ripsuptrig(void);
260 void fatal(const char *, ...)
261 __attribute__((__format__(__printf__, 1, 2)));
262 void trace(int, const char *, ...)
263 __attribute__((__format__(__printf__, 2, 3)));
264 void tracet(int, const char *, ...)
265 __attribute__((__format__(__printf__, 2, 3)));
266 unsigned int if_maxindex(void);
267 struct ifc *ifc_find(char *);
268 struct iff *iff_find(struct ifc *, int);
269 void setindex2ifc(int, struct ifc *);
271 #define MALLOC(type) ((type *)malloc(sizeof(type)))
273 #define IFIL_TYPE_ANY 0x0
274 #define IFIL_TYPE_A 'A'
275 #define IFIL_TYPE_N 'N'
276 #define IFIL_TYPE_T 'T'
277 #define IFIL_TYPE_O 'O'
278 #define IFIL_TYPE_L 'L'
281 main(int argc, char *argv[])
287 sigset_t mask, omask;
288 const char *pidfile = ROUTE6D_PID;
293 progname = strrchr(*argv, '/');
300 while ((ch = getopt(argc, argv, "A:N:O:R:T:L:t:adDhlnp:P:Q:qsS")) != -1) {
307 if (nfilter >= MAXFILTER) {
308 fatal("Exceeds MAXFILTER");
311 filtertype[nfilter] = ch;
312 filter[nfilter++] = allocopy(optarg);
316 routetag = strtoul(optarg, &ep, 0);
317 if (!ep || *ep != '\0' || (routetag & ~0xffff) != 0) {
318 fatal("invalid route tag");
327 proto = strtoul(optarg, &ep, 0);
328 if (!ep || *ep != '\0' || 3 < proto) {
329 fatal("invalid P flag");
343 proto = strtoul(optarg, &ep, 0);
344 if (!ep || *ep != '\0' || 3 < proto) {
345 fatal("invalid Q flag");
358 if ((rtlog = fopen(optarg, "w")) == NULL) {
359 fatal("Can not write to routelog");
363 #define FLAG(c, flag, n) case c: do { flag = n; break; } while(0)
364 FLAG('a', aflag, 1); break;
365 FLAG('d', dflag, 1); break;
366 FLAG('D', dflag, 2); break;
367 FLAG('h', hflag, 1); break;
368 FLAG('l', lflag, 1); break;
369 FLAG('n', nflag, 1); break;
370 FLAG('q', qflag, 1); break;
371 FLAG('s', sflag, 1); break;
372 FLAG('S', Sflag, 1); break;
375 fatal("Invalid option specified, terminating");
382 fatal("bogus extra arguments");
388 fprintf(stderr, "No kernel update is allowed\n");
392 if (daemon(0, 0) < 0) {
398 openlog(progname, LOG_NDELAY|LOG_PID, LOG_DAEMON);
401 if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL)
403 memset(ripbuf, 0, RIP6_MAXMTU);
404 ripbuf->rip6_cmd = RIP6_RESPONSE;
405 ripbuf->rip6_vers = RIP6_VERSION;
406 ripbuf->rip6_res1[0] = 0;
407 ripbuf->rip6_res1[1] = 0;
411 TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
412 if (ifcp->ifc_index < 0) {
413 fprintf(stderr, "No ifindex found at %s "
414 "(no link-local address?)\n", ifcp->ifc_name);
420 if (loopifcp == NULL) {
421 fatal("No loopback found");
424 TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
433 if ((pidfh = fopen(pidfile, "w")) != NULL) {
434 fprintf(pidfh, "%d\n", pid);
438 if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL) {
442 memset(ripbuf, 0, RIP6_MAXMTU);
443 ripbuf->rip6_cmd = RIP6_RESPONSE;
444 ripbuf->rip6_vers = RIP6_VERSION;
445 ripbuf->rip6_res1[0] = 0;
446 ripbuf->rip6_res1[1] = 0;
448 if (signal(SIGALRM, sighandler) == SIG_ERR ||
449 signal(SIGQUIT, sighandler) == SIG_ERR ||
450 signal(SIGTERM, sighandler) == SIG_ERR ||
451 signal(SIGUSR1, sighandler) == SIG_ERR ||
452 signal(SIGHUP, sighandler) == SIG_ERR ||
453 signal(SIGINT, sighandler) == SIG_ERR) {
458 * To avoid rip packet congestion (not on a cable but in this
459 * process), wait for a moment to send the first RIP6_RESPONSE
462 alarm(ripinterval(INIT_INTERVAL6));
464 TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
465 if (iff_find(ifcp, IFIL_TYPE_N) != NULL)
467 if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP))
471 syslog(LOG_INFO, "**** Started ****");
473 sigaddset(&mask, SIGALRM);
492 switch (poll(set, 2, INFTIM))
494 memcpy(recvecp, sockvecp, fdmasks);
495 switch (select(maxfd + 1, recvecp, 0, 0, 0))
499 if (errno != EINTR) {
508 if (set[0].revents & POLLIN)
510 if (FD_ISSET(ripsock, recvecp))
513 sigprocmask(SIG_BLOCK, &mask, &omask);
515 sigprocmask(SIG_SETMASK, &omask, NULL);
518 if (set[1].revents & POLLIN)
520 if (FD_ISSET(rtsock, recvecp))
523 sigprocmask(SIG_BLOCK, &mask, &omask);
525 sigprocmask(SIG_SETMASK, &omask, NULL);
532 sighandler(int signo)
552 * gracefully exits after resetting sockopts.
561 TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
562 if (rrt->rrt_rflags & RRTF_AGGREGATE) {
563 delroute(&rrt->rrt_info, &rrt->rrt_gw);
568 syslog(LOG_INFO, "**** Terminated ****");
574 * Called periodically:
575 * 1. age out the learned route. remove it if necessary.
576 * 2. submit RIP6_RESPONSE packets.
577 * Invoked in every SUPPLY_INTERVAL6 (30) seconds. I believe we don't have
578 * to invoke this function in every 1 or 5 or 10 seconds only to age the
579 * routes more precisely.
586 struct riprt *rrt, *rrt_tmp;
587 time_t t_lifetime, t_holddown;
589 /* age the RIP routes */
590 t_lifetime = time(NULL) - RIP_LIFETIME;
591 t_holddown = t_lifetime - RIP_HOLDDOWN;
592 TAILQ_FOREACH_SAFE(rrt, &riprt_head, rrt_next, rrt_tmp) {
595 else if (rrt->rrt_t < t_holddown) {
596 TAILQ_REMOVE(&riprt_head, rrt, rrt_next);
597 delroute(&rrt->rrt_info, &rrt->rrt_gw);
599 } else if (rrt->rrt_t < t_lifetime)
600 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
603 TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
604 if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP))
605 ripsend(ifcp, &ifcp->ifc_ripsin, 0);
607 alarm(ripinterval(SUPPLY_INTERVAL6));
614 const int int0 = 0, int1 = 1, int255 = 255;
615 struct addrinfo hints, *res;
616 char port[NI_MAXSERV];
618 TAILQ_INIT(&ifc_head);
619 nindex2ifc = 0; /*initial guess*/
621 snprintf(port, sizeof(port), "%u", RIP6_PORT);
623 memset(&hints, 0, sizeof(hints));
624 hints.ai_family = PF_INET6;
625 hints.ai_socktype = SOCK_DGRAM;
626 hints.ai_protocol = IPPROTO_UDP;
627 hints.ai_flags = AI_PASSIVE;
628 error = getaddrinfo(NULL, port, &hints, &res);
630 fatal("%s", gai_strerror(error));
634 fatal(":: resolved to multiple address");
638 ripsock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
644 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_V6ONLY,
645 &int1, sizeof(int1)) < 0) {
646 fatal("rip IPV6_V6ONLY");
650 if (bind(ripsock, res->ai_addr, res->ai_addrlen) < 0) {
654 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
655 &int255, sizeof(int255)) < 0) {
656 fatal("rip IPV6_MULTICAST_HOPS");
659 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
660 &int0, sizeof(int0)) < 0) {
661 fatal("rip IPV6_MULTICAST_LOOP");
665 #ifdef IPV6_RECVPKTINFO
666 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_RECVPKTINFO,
667 &int1, sizeof(int1)) < 0) {
668 fatal("rip IPV6_RECVPKTINFO");
671 #else /* old adv. API */
672 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_PKTINFO,
673 &int1, sizeof(int1)) < 0) {
674 fatal("rip IPV6_PKTINFO");
679 #ifdef IPV6_RECVPKTINFO
680 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
681 &int1, sizeof(int1)) < 0) {
682 fatal("rip IPV6_RECVHOPLIMIT");
685 #else /* old adv. API */
686 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_HOPLIMIT,
687 &int1, sizeof(int1)) < 0) {
688 fatal("rip IPV6_HOPLIMIT");
693 memset(&hints, 0, sizeof(hints));
694 hints.ai_family = PF_INET6;
695 hints.ai_socktype = SOCK_DGRAM;
696 hints.ai_protocol = IPPROTO_UDP;
697 error = getaddrinfo(RIP6_DEST, port, &hints, &res);
699 fatal("%s", gai_strerror(error));
703 fatal("%s resolved to multiple address", RIP6_DEST);
706 memcpy(&ripsin, res->ai_addr, res->ai_addrlen);
710 set[0].events = POLLIN;
716 if ((rtsock = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) {
717 fatal("route socket");
722 set[1].events = POLLIN;
731 rtsock = -1; /*just for safety */
736 fdmasks = howmany(maxfd + 1, NFDBITS) * sizeof(fd_mask);
737 if ((sockvecp = malloc(fdmasks)) == NULL) {
741 if ((recvecp = malloc(fdmasks)) == NULL) {
745 memset(sockvecp, 0, fdmasks);
746 FD_SET(ripsock, sockvecp);
748 FD_SET(rtsock, sockvecp);
753 (sizeof(struct rip6) + ((n)-1) * sizeof(struct netinfo6))
756 * ripflush flushes the rip datagram stored in the rip buffer
759 ripflush(struct ifc *ifcp, struct sockaddr_in6 *sin6, int nrt, struct netinfo6 *np)
765 tracet(1, "Send(%s): info(%d) to %s.%d\n",
767 inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port));
769 tracet(1, "Send: info(%d) to %s.%d\n",
770 nrt, inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port));
772 np = ripbuf->rip6_nets;
773 for (i = 0; i < nrt; i++, np++) {
774 if (np->rip6_metric == NEXTHOP_METRIC) {
775 if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest))
776 trace(2, " NextHop reset");
778 trace(2, " NextHop %s",
779 inet6_n2p(&np->rip6_dest));
782 trace(2, " %s/%d[%d]",
783 inet6_n2p(&np->rip6_dest),
784 np->rip6_plen, np->rip6_metric);
787 trace(2, " tag=0x%04x",
788 ntohs(np->rip6_tag) & 0xffff);
793 error = sendpacket(sin6, RIPSIZE(nrt));
794 if (error == EAFNOSUPPORT) {
795 /* Protocol not supported */
796 tracet(1, "Could not send info to %s (%s): "
798 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr));
799 ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */
804 * Generate RIP6_RESPONSE packets and send them.
807 ripsend(struct ifc *ifcp, struct sockaddr_in6 *sin6, int flag)
810 struct in6_addr *nh; /* next hop */
820 * Request from non-link local address is not
821 * a regular route6d update.
823 maxrte = (IFMINMTU - sizeof(struct ip6_hdr) -
824 sizeof(struct udphdr) -
825 sizeof(struct rip6) + sizeof(struct netinfo6)) /
826 sizeof(struct netinfo6);
829 np = ripbuf->rip6_nets;
830 TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
831 if (rrt->rrt_rflags & RRTF_NOADVERTISE)
833 /* Put the route to the buffer */
837 ripflush(NULL, sin6, nrt, np);
840 np = ripbuf->rip6_nets;
843 if (nrt) /* Send last packet */
844 ripflush(NULL, sin6, nrt, np);
848 if ((flag & RRTF_SENDANYWAY) == 0 &&
849 (qflag || (ifcp->ifc_flags & IFF_LOOPBACK)))
853 if (iff_find(ifcp, IFIL_TYPE_N) != NULL)
856 /* -T: generate default route only */
857 if (iff_find(ifcp, IFIL_TYPE_T) != NULL) {
858 struct netinfo6 rrt_info;
859 memset(&rrt_info, 0, sizeof(struct netinfo6));
860 rrt_info.rip6_dest = in6addr_any;
861 rrt_info.rip6_plen = 0;
862 rrt_info.rip6_metric = 1;
863 rrt_info.rip6_metric += ifcp->ifc_metric;
864 rrt_info.rip6_tag = htons(routetag & 0xffff);
865 np = ripbuf->rip6_nets;
868 ripflush(ifcp, sin6, nrt, np);
872 maxrte = (ifcp->ifc_mtu - sizeof(struct ip6_hdr) -
873 sizeof(struct udphdr) -
874 sizeof(struct rip6) + sizeof(struct netinfo6)) /
875 sizeof(struct netinfo6);
877 nrt = 0; np = ripbuf->rip6_nets; nh = NULL;
878 TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
879 if (rrt->rrt_rflags & RRTF_NOADVERTISE)
882 /* Need to check filter here */
883 if (out_filter(rrt, ifcp) == 0)
886 /* Check split horizon and other conditions */
887 if (tobeadv(rrt, ifcp) == 0)
890 /* Only considers the routes with flag if specified */
891 if ((flag & RRTF_CHANGED) &&
892 (rrt->rrt_rflags & RRTF_CHANGED) == 0)
896 if (rrt->rrt_index == ifcp->ifc_index &&
897 !IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_gw) &&
898 (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR) == 0) {
899 if (nh == NULL || !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)) {
900 if (nrt == maxrte - 2) {
901 ripflush(ifcp, sin6, nrt, np);
904 np = ripbuf->rip6_nets;
907 np->rip6_dest = rrt->rrt_gw;
910 np->rip6_metric = NEXTHOP_METRIC;
914 } else if (nh && (rrt->rrt_index != ifcp->ifc_index ||
915 !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw) ||
916 rrt->rrt_rflags & RRTF_NH_NOT_LLADDR)) {
918 if (nrt == maxrte - 2) {
919 ripflush(ifcp, sin6, nrt, np);
922 np = ripbuf->rip6_nets;
924 memset(np, 0, sizeof(struct netinfo6));
925 np->rip6_metric = NEXTHOP_METRIC;
930 /* Put the route to the buffer */
934 ripflush(ifcp, sin6, nrt, np);
937 np = ripbuf->rip6_nets;
940 if (nrt) /* Send last packet */
941 ripflush(ifcp, sin6, nrt, np);
945 * outbound filter logic, per-route/interface.
948 out_filter(struct riprt *rrt, struct ifc *ifcp)
955 * -A: filter out less specific routes, if we have aggregated
958 TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
959 if (iffp->iff_type != 'A')
961 if (rrt->rrt_info.rip6_plen <= iffp->iff_plen)
963 ia = rrt->rrt_info.rip6_dest;
964 applyplen(&ia, iffp->iff_plen);
965 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr))
970 * if it is an aggregated route, advertise it only to the
971 * interfaces specified on -A.
973 if ((rrt->rrt_rflags & RRTF_AGGREGATE) != 0) {
975 TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
976 if (iffp->iff_type != 'A')
978 if (rrt->rrt_info.rip6_plen == iffp->iff_plen &&
979 IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,
990 * -O: advertise only if prefix matches the configured prefix.
992 if (iff_find(ifcp, IFIL_TYPE_O) != NULL) {
994 TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
995 if (iffp->iff_type != 'O')
997 if (rrt->rrt_info.rip6_plen < iffp->iff_plen)
999 ia = rrt->rrt_info.rip6_dest;
1000 applyplen(&ia, iffp->iff_plen);
1001 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) {
1010 /* the prefix should be advertised */
1015 * Determine if the route is to be advertised on the specified interface.
1016 * It checks options specified in the arguments and the split horizon rule.
1019 tobeadv(struct riprt *rrt, struct ifc *ifcp)
1022 /* Special care for static routes */
1023 if (rrt->rrt_flags & RTF_STATIC) {
1024 /* XXX don't advertise reject/blackhole routes */
1025 if (rrt->rrt_flags & (RTF_REJECT | RTF_BLACKHOLE))
1028 if (Sflag) /* Yes, advertise it anyway */
1030 if (sflag && rrt->rrt_index != ifcp->ifc_index)
1034 /* Regular split horizon */
1035 if (hflag == 0 && rrt->rrt_index == ifcp->ifc_index)
1041 * Send a rip packet actually.
1044 sendpacket(struct sockaddr_in6 *sin6, int len)
1048 struct iovec iov[2];
1049 u_char cmsgbuf[256];
1050 struct in6_pktinfo *pi;
1052 struct sockaddr_in6 sincopy;
1054 /* do not overwrite the given sin */
1058 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) ||
1059 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
1060 idx = sin6->sin6_scope_id;
1064 m.msg_name = (caddr_t)sin6;
1065 m.msg_namelen = sizeof(*sin6);
1066 iov[0].iov_base = (caddr_t)ripbuf;
1067 iov[0].iov_len = len;
1071 m.msg_control = NULL;
1072 m.msg_controllen = 0;
1074 memset(cmsgbuf, 0, sizeof(cmsgbuf));
1075 cm = (struct cmsghdr *)cmsgbuf;
1076 m.msg_control = (caddr_t)cm;
1077 m.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo));
1079 cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
1080 cm->cmsg_level = IPPROTO_IPV6;
1081 cm->cmsg_type = IPV6_PKTINFO;
1082 pi = (struct in6_pktinfo *)CMSG_DATA(cm);
1083 memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*::*/
1084 pi->ipi6_ifindex = idx;
1087 if (sendmsg(ripsock, &m, 0 /*MSG_DONTROUTE*/) < 0) {
1088 trace(1, "sendmsg: %s\n", strerror(errno));
1096 * Receive and process RIP packets. Update the routes/kernel forwarding
1097 * table if necessary.
1102 struct ifc *ifcp, *ic;
1103 struct sockaddr_in6 fsock;
1104 struct in6_addr nh; /* next hop */
1106 struct netinfo6 *np, *nq;
1109 unsigned int need_trigger, idx;
1110 char buf[4 * RIP6_MAXMTU];
1114 struct iovec iov[2];
1115 u_char cmsgbuf[256];
1116 struct in6_pktinfo *pi = NULL;
1121 time_t t_half_lifetime;
1125 m.msg_name = (caddr_t)&fsock;
1126 m.msg_namelen = sizeof(fsock);
1127 iov[0].iov_base = (caddr_t)buf;
1128 iov[0].iov_len = sizeof(buf);
1131 cm = (struct cmsghdr *)cmsgbuf;
1132 m.msg_control = (caddr_t)cm;
1133 m.msg_controllen = sizeof(cmsgbuf);
1134 if ((len = recvmsg(ripsock, &m, 0)) < 0) {
1139 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&m);
1141 cm = (struct cmsghdr *)CMSG_NXTHDR(&m, cm)) {
1142 if (cm->cmsg_level != IPPROTO_IPV6)
1144 switch (cm->cmsg_type) {
1146 if (cm->cmsg_len != CMSG_LEN(sizeof(*pi))) {
1148 "invalid cmsg length for IPV6_PKTINFO\n");
1151 pi = (struct in6_pktinfo *)(CMSG_DATA(cm));
1152 idx = pi->ipi6_ifindex;
1155 if (cm->cmsg_len != CMSG_LEN(sizeof(int))) {
1157 "invalid cmsg length for IPV6_HOPLIMIT\n");
1160 hlimp = (int *)CMSG_DATA(cm);
1165 if ((size_t)len < sizeof(struct rip6)) {
1166 trace(1, "Packet too short\n");
1170 if (pi == NULL || hlimp == NULL) {
1172 * This can happen when the kernel failed to allocate memory
1173 * for the ancillary data. Although we might be able to handle
1174 * some cases without this info, those are minor and not so
1175 * important, so it's better to discard the packet for safer
1178 trace(1, "IPv6 packet information cannot be retrieved\n");
1182 nh = fsock.sin6_addr;
1183 nn = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
1184 sizeof(struct netinfo6);
1185 rp = (struct rip6 *)buf;
1188 if (rp->rip6_vers != RIP6_VERSION) {
1189 trace(1, "Incorrect RIP version %d\n", rp->rip6_vers);
1192 if (rp->rip6_cmd == RIP6_REQUEST) {
1193 if (idx && idx < nindex2ifc) {
1194 ifcp = index2ifc[idx];
1195 riprequest(ifcp, np, nn, &fsock);
1197 riprequest(NULL, np, nn, &fsock);
1202 if (!IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) {
1203 trace(1, "Response from non-ll addr: %s\n",
1204 inet6_n2p(&fsock.sin6_addr));
1205 return; /* Ignore packets from non-link-local addr */
1207 if (ntohs(fsock.sin6_port) != RIP6_PORT) {
1208 trace(1, "Response from non-rip port from %s\n",
1209 inet6_n2p(&fsock.sin6_addr));
1212 if (IN6_IS_ADDR_MULTICAST(&pi->ipi6_addr) && *hlimp != 255) {
1214 "Response packet with a smaller hop limit (%d) from %s\n",
1215 *hlimp, inet6_n2p(&fsock.sin6_addr));
1219 * Further validation: since this program does not send off-link
1220 * requests, an incoming response must always come from an on-link
1221 * node. Although this is normally ensured by the source address
1222 * check above, it may not 100% be safe because there are router
1223 * implementations that (invalidly) allow a packet with a link-local
1224 * source address to be forwarded to a different link.
1225 * So we also check whether the destination address is a link-local
1226 * address or the hop limit is 255. Note that RFC2080 does not require
1227 * the specific hop limit for a unicast response, so we cannot assume
1230 if (!IN6_IS_ADDR_LINKLOCAL(&pi->ipi6_addr) && *hlimp != 255) {
1232 "Response packet possibly from an off-link node: "
1233 "from %s to %s hlim=%d\n",
1234 inet6_n2p(&fsock.sin6_addr),
1235 inet6_n2p(&pi->ipi6_addr), *hlimp);
1239 idx = fsock.sin6_scope_id;
1240 ifcp = (idx < nindex2ifc) ? index2ifc[idx] : NULL;
1242 trace(1, "Packets to unknown interface index %d\n", idx);
1243 return; /* Ignore it */
1245 if (IN6_ARE_ADDR_EQUAL(&ifcp->ifc_mylladdr, &fsock.sin6_addr))
1246 return; /* The packet is from me; ignore */
1247 if (rp->rip6_cmd != RIP6_RESPONSE) {
1248 trace(1, "Invalid command %d\n", rp->rip6_cmd);
1253 if (iff_find(ifcp, IFIL_TYPE_N) != NULL)
1256 tracet(1, "Recv(%s): from %s.%d info(%zd)\n",
1257 ifcp->ifc_name, inet6_n2p(&nh), ntohs(fsock.sin6_port), nn);
1260 t_half_lifetime = t - (RIP_LIFETIME/2);
1261 for (; nn; nn--, np++) {
1262 if (np->rip6_metric == NEXTHOP_METRIC) {
1263 /* modify neighbor address */
1264 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) {
1266 trace(1, "\tNexthop: %s\n", inet6_n2p(&nh));
1267 } else if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) {
1268 nh = fsock.sin6_addr;
1269 trace(1, "\tNexthop: %s\n", inet6_n2p(&nh));
1271 nh = fsock.sin6_addr;
1272 trace(1, "\tInvalid Nexthop: %s\n",
1273 inet6_n2p(&np->rip6_dest));
1277 if (IN6_IS_ADDR_MULTICAST(&np->rip6_dest)) {
1278 trace(1, "\tMulticast netinfo6: %s/%d [%d]\n",
1279 inet6_n2p(&np->rip6_dest),
1280 np->rip6_plen, np->rip6_metric);
1283 if (IN6_IS_ADDR_LOOPBACK(&np->rip6_dest)) {
1284 trace(1, "\tLoopback netinfo6: %s/%d [%d]\n",
1285 inet6_n2p(&np->rip6_dest),
1286 np->rip6_plen, np->rip6_metric);
1289 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) {
1290 trace(1, "\tLink Local netinfo6: %s/%d [%d]\n",
1291 inet6_n2p(&np->rip6_dest),
1292 np->rip6_plen, np->rip6_metric);
1295 /* may need to pass sitelocal prefix in some case, however*/
1296 if (IN6_IS_ADDR_SITELOCAL(&np->rip6_dest) && !lflag) {
1297 trace(1, "\tSite Local netinfo6: %s/%d [%d]\n",
1298 inet6_n2p(&np->rip6_dest),
1299 np->rip6_plen, np->rip6_metric);
1302 trace(2, "\tnetinfo6: %s/%d [%d]",
1303 inet6_n2p(&np->rip6_dest),
1304 np->rip6_plen, np->rip6_metric);
1306 trace(2, " tag=0x%04x", ntohs(np->rip6_tag) & 0xffff);
1309 applyplen(&ia, np->rip6_plen);
1310 if (!IN6_ARE_ADDR_EQUAL(&ia, &np->rip6_dest))
1311 trace(2, " [junk outside prefix]");
1315 * -L: listen only if the prefix matches the configuration
1317 ok = 1; /* if there's no L filter, it is ok */
1318 TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
1319 if (iffp->iff_type != IFIL_TYPE_L)
1322 if (np->rip6_plen < iffp->iff_plen)
1324 /* special rule: ::/0 means default, not "in /0" */
1325 if (iffp->iff_plen == 0 && np->rip6_plen > 0)
1328 applyplen(&ia, iffp->iff_plen);
1329 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) {
1335 trace(2, " (filtered)\n");
1341 np->rip6_metric += ifcp->ifc_metric;
1342 if (np->rip6_metric > HOPCNT_INFINITY6)
1343 np->rip6_metric = HOPCNT_INFINITY6;
1345 applyplen(&np->rip6_dest, np->rip6_plen);
1346 if ((rrt = rtsearch(np)) != NULL) {
1347 if (rrt->rrt_t == 0)
1348 continue; /* Intf route has priority */
1349 nq = &rrt->rrt_info;
1350 if (nq->rip6_metric > np->rip6_metric) {
1351 if (rrt->rrt_index == ifcp->ifc_index &&
1352 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) {
1353 /* Small metric from the same gateway */
1354 nq->rip6_metric = np->rip6_metric;
1356 /* Better route found */
1357 rrt->rrt_index = ifcp->ifc_index;
1358 /* Update routing table */
1359 delroute(nq, &rrt->rrt_gw);
1362 addroute(rrt, &nh, ifcp);
1364 rrt->rrt_rflags |= RRTF_CHANGED;
1367 } else if (nq->rip6_metric < np->rip6_metric &&
1368 rrt->rrt_index == ifcp->ifc_index &&
1369 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) {
1370 /* Got worse route from same gw */
1371 nq->rip6_metric = np->rip6_metric;
1373 rrt->rrt_rflags |= RRTF_CHANGED;
1375 } else if (nq->rip6_metric == np->rip6_metric &&
1376 np->rip6_metric < HOPCNT_INFINITY6) {
1377 if (rrt->rrt_index == ifcp->ifc_index &&
1378 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) {
1379 /* same metric, same route from same gw */
1381 } else if (rrt->rrt_t < t_half_lifetime) {
1382 /* Better route found */
1383 rrt->rrt_index = ifcp->ifc_index;
1384 /* Update routing table */
1385 delroute(nq, &rrt->rrt_gw);
1388 addroute(rrt, &nh, ifcp);
1389 rrt->rrt_rflags |= RRTF_CHANGED;
1394 * if nq->rip6_metric == HOPCNT_INFINITY6 then
1395 * do not update age value. Do nothing.
1397 } else if (np->rip6_metric < HOPCNT_INFINITY6) {
1398 /* Got a new valid route */
1399 if ((rrt = MALLOC(struct riprt)) == NULL) {
1400 fatal("malloc: struct riprt");
1403 memset(rrt, 0, sizeof(*rrt));
1404 nq = &rrt->rrt_info;
1406 rrt->rrt_same = NULL;
1407 rrt->rrt_index = ifcp->ifc_index;
1408 rrt->rrt_flags = RTF_UP|RTF_GATEWAY;
1411 applyplen(&nq->rip6_dest, nq->rip6_plen);
1412 if (nq->rip6_plen == sizeof(struct in6_addr) * 8)
1413 rrt->rrt_flags |= RTF_HOST;
1415 /* Update routing table */
1416 addroute(rrt, &nh, ifcp);
1417 rrt->rrt_rflags |= RRTF_CHANGED;
1421 /* Put the route to the list */
1422 TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next);
1425 /* XXX need to care the interval between triggered updates */
1427 if (nextalarm > time(NULL) + RIP_TRIG_INT6_MAX) {
1428 TAILQ_FOREACH(ic, &ifc_head, ifc_next) {
1429 if (ifcp->ifc_index == ic->ifc_index)
1431 if (ic->ifc_flags & IFF_UP)
1432 ripsend(ic, &ic->ifc_ripsin,
1436 /* Reset the flag */
1437 TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
1438 rrt->rrt_rflags &= ~RRTF_CHANGED;
1444 * Send all routes request packet to the specified interface.
1447 sendrequest(struct ifc *ifcp)
1449 struct netinfo6 *np;
1452 if (ifcp->ifc_flags & IFF_LOOPBACK)
1454 ripbuf->rip6_cmd = RIP6_REQUEST;
1455 np = ripbuf->rip6_nets;
1456 memset(np, 0, sizeof(struct netinfo6));
1457 np->rip6_metric = HOPCNT_INFINITY6;
1458 tracet(1, "Send rtdump Request to %s (%s)\n",
1459 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr));
1460 error = sendpacket(&ifcp->ifc_ripsin, RIPSIZE(1));
1461 if (error == EAFNOSUPPORT) {
1462 /* Protocol not supported */
1463 tracet(1, "Could not send rtdump Request to %s (%s): "
1464 "set IFF_UP to 0\n",
1465 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr));
1466 ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */
1468 ripbuf->rip6_cmd = RIP6_RESPONSE;
1472 * Process a RIP6_REQUEST packet.
1475 riprequest(struct ifc *ifcp,
1476 struct netinfo6 *np,
1478 struct sockaddr_in6 *sin6)
1483 if (!(nn == 1 && IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest) &&
1484 np->rip6_plen == 0 && np->rip6_metric == HOPCNT_INFINITY6)) {
1485 /* Specific response, don't split-horizon */
1486 trace(1, "\tRIP Request\n");
1487 for (i = 0; i < nn; i++, np++) {
1490 np->rip6_metric = rrt->rrt_info.rip6_metric;
1492 np->rip6_metric = HOPCNT_INFINITY6;
1494 (void)sendpacket(sin6, RIPSIZE(nn));
1497 /* Whole routing table dump */
1498 trace(1, "\tRIP Request -- whole routing table\n");
1499 ripsend(ifcp, sin6, RRTF_SENDANYWAY);
1503 * Get information of each interface.
1508 struct ifaddrs *ifap, *ifa;
1510 struct ipv6_mreq mreq;
1513 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1518 if (getifaddrs(&ifap) != 0) {
1519 fatal("getifaddrs");
1523 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1524 if (ifa->ifa_addr->sa_family != AF_INET6)
1526 ifcp = ifc_find(ifa->ifa_name);
1527 /* we are interested in multicast-capable interfaces */
1528 if ((ifa->ifa_flags & IFF_MULTICAST) == 0)
1532 if ((ifcp = MALLOC(struct ifc)) == NULL) {
1533 fatal("malloc: struct ifc");
1536 memset(ifcp, 0, sizeof(*ifcp));
1538 ifcp->ifc_index = -1;
1539 strlcpy(ifcp->ifc_name, ifa->ifa_name,
1540 sizeof(ifcp->ifc_name));
1541 TAILQ_INIT(&ifcp->ifc_ifac_head);
1542 TAILQ_INIT(&ifcp->ifc_iff_head);
1543 ifcp->ifc_flags = ifa->ifa_flags;
1544 TAILQ_INSERT_HEAD(&ifc_head, ifcp, ifc_next);
1545 trace(1, "newif %s <%s>\n", ifcp->ifc_name,
1546 ifflags(ifcp->ifc_flags));
1547 if (!strcmp(ifcp->ifc_name, LOOPBACK_IF))
1550 /* update flag, this may be up again */
1551 if (ifcp->ifc_flags != ifa->ifa_flags) {
1552 trace(1, "%s: <%s> -> ", ifcp->ifc_name,
1553 ifflags(ifcp->ifc_flags));
1554 trace(1, "<%s>\n", ifflags(ifa->ifa_flags));
1555 ifcp->ifc_cflags |= IFC_CHANGED;
1557 ifcp->ifc_flags = ifa->ifa_flags;
1559 if (ifconfig1(ifa->ifa_name, ifa->ifa_addr, ifcp, s) < 0) {
1560 /* maybe temporary failure */
1563 if ((ifcp->ifc_flags & (IFF_LOOPBACK | IFF_UP)) == IFF_UP
1564 && 0 < ifcp->ifc_index && !ifcp->ifc_joined) {
1565 mreq.ipv6mr_multiaddr = ifcp->ifc_ripsin.sin6_addr;
1566 mreq.ipv6mr_interface = ifcp->ifc_index;
1567 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_JOIN_GROUP,
1568 &mreq, sizeof(mreq)) < 0) {
1569 fatal("IPV6_JOIN_GROUP");
1572 trace(1, "join %s %s\n", ifcp->ifc_name, RIP6_DEST);
1581 ifconfig1(const char *name,
1582 const struct sockaddr *sa,
1586 struct in6_ifreq ifr;
1587 const struct sockaddr_in6 *sin6;
1592 sin6 = (const struct sockaddr_in6 *)sa;
1593 if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && !lflag)
1595 ifr.ifr_addr = *sin6;
1596 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
1597 if (ioctl(s, SIOCGIFNETMASK_IN6, (char *)&ifr) < 0) {
1598 syslog(LOG_INFO, "ioctl: SIOCGIFNETMASK_IN6");
1601 plen = sin6mask2len(&ifr.ifr_addr);
1602 if ((ifac = ifa_match(ifcp, &sin6->sin6_addr, plen)) != NULL) {
1603 /* same interface found */
1604 /* need check if something changed */
1605 /* XXX not yet implemented */
1609 * New address is found
1611 if ((ifac = MALLOC(struct ifac)) == NULL) {
1612 fatal("malloc: struct ifac");
1615 memset(ifac, 0, sizeof(*ifac));
1617 ifac->ifac_ifc = ifcp;
1618 ifac->ifac_addr = sin6->sin6_addr;
1619 ifac->ifac_plen = plen;
1620 ifac->ifac_scope_id = sin6->sin6_scope_id;
1621 if (ifcp->ifc_flags & IFF_POINTOPOINT) {
1622 ifr.ifr_addr = *sin6;
1623 if (ioctl(s, SIOCGIFDSTADDR_IN6, (char *)&ifr) < 0) {
1624 fatal("ioctl: SIOCGIFDSTADDR_IN6");
1627 ifac->ifac_raddr = ifr.ifr_dstaddr.sin6_addr;
1628 inet_ntop(AF_INET6, (void *)&ifac->ifac_raddr, buf,
1630 trace(1, "found address %s/%d -- %s\n",
1631 inet6_n2p(&ifac->ifac_addr), ifac->ifac_plen, buf);
1633 trace(1, "found address %s/%d\n",
1634 inet6_n2p(&ifac->ifac_addr), ifac->ifac_plen);
1636 if (ifcp->ifc_index < 0 && IN6_IS_ADDR_LINKLOCAL(&ifac->ifac_addr)) {
1637 ifcp->ifc_mylladdr = ifac->ifac_addr;
1638 ifcp->ifc_index = ifac->ifac_scope_id;
1639 memcpy(&ifcp->ifc_ripsin, &ripsin, ripsin.ss_len);
1640 ifcp->ifc_ripsin.sin6_scope_id = ifcp->ifc_index;
1641 setindex2ifc(ifcp->ifc_index, ifcp);
1642 ifcp->ifc_mtu = getifmtu(ifcp->ifc_index);
1643 if (ifcp->ifc_mtu > RIP6_MAXMTU)
1644 ifcp->ifc_mtu = RIP6_MAXMTU;
1645 if (ioctl(s, SIOCGIFMETRIC, (char *)&ifr) < 0) {
1646 fatal("ioctl: SIOCGIFMETRIC");
1649 ifcp->ifc_metric = ifr.ifr_metric;
1650 trace(1, "\tindex: %d, mtu: %d, metric: %d\n",
1651 ifcp->ifc_index, ifcp->ifc_mtu, ifcp->ifc_metric);
1653 ifcp->ifc_cflags |= IFC_CHANGED;
1655 TAILQ_INSERT_HEAD(&ifcp->ifc_ifac_head, ifac, ifac_next);
1661 ifremove(int ifindex)
1666 TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
1667 if (ifcp->ifc_index == ifindex)
1673 tracet(1, "ifremove: %s is departed.\n", ifcp->ifc_name);
1674 TAILQ_REMOVE(&ifc_head, ifcp, ifc_next);
1676 TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
1677 if (rrt->rrt_index == ifcp->ifc_index &&
1678 rrt->rrt_rflags & RRTF_AGGREGATE)
1679 delroute(&rrt->rrt_info, &rrt->rrt_gw);
1685 * Receive and process routing messages.
1686 * Update interface information as necesssary.
1693 struct rt_msghdr *rtm;
1694 struct ifa_msghdr *ifam;
1695 struct if_msghdr *ifm;
1696 struct if_announcemsghdr *ifan;
1698 struct ifc *ifcp, *ic;
1699 int iface = 0, rtable = 0;
1700 struct sockaddr_in6 *rta[RTAX_MAX];
1701 struct sockaddr_in6 mask;
1705 if ((len = read(rtsock, buf, sizeof(buf))) < 0) {
1706 perror("read from rtsock");
1712 if (len < sizeof(*rtm)) {
1713 trace(1, "short read from rtsock: %d (should be > %lu)\n",
1714 len, (u_long)sizeof(*rtm));
1719 fprintf(stderr, "rtmsg:\n");
1720 for (i = 0; i < len; i++) {
1721 fprintf(stderr, "%02x ", buf[i] & 0xff);
1722 if (i % 16 == 15) fprintf(stderr, "\n");
1724 fprintf(stderr, "\n");
1727 for (p = buf; p - buf < len; p += ((struct rt_msghdr *)p)->rtm_msglen) {
1728 if (((struct rt_msghdr *)p)->rtm_version != RTM_VERSION)
1731 /* safety against bogus message */
1732 if (((struct rt_msghdr *)p)->rtm_msglen <= 0) {
1733 trace(1, "bogus rtmsg: length=%d\n",
1734 ((struct rt_msghdr *)p)->rtm_msglen);
1740 switch (((struct rt_msghdr *)p)->rtm_type) {
1743 ifam = (struct ifa_msghdr *)p;
1744 addrs = ifam->ifam_addrs;
1745 q = (char *)(ifam + 1);
1748 ifm = (struct if_msghdr *)p;
1749 addrs = ifm->ifm_addrs;
1750 q = (char *)(ifm + 1);
1752 case RTM_IFANNOUNCE:
1753 ifan = (struct if_announcemsghdr *)p;
1754 switch (ifan->ifan_what) {
1758 case IFAN_DEPARTURE:
1759 ifremove(ifan->ifan_index);
1765 rtm = (struct rt_msghdr *)p;
1766 addrs = rtm->rtm_addrs;
1767 q = (char *)(rtm + 1);
1768 if (rtm->rtm_version != RTM_VERSION) {
1769 trace(1, "unexpected rtmsg version %d "
1771 rtm->rtm_version, RTM_VERSION);
1774 if (rtm->rtm_pid == pid) {
1776 trace(1, "rtmsg looped back to me, ignored\n");
1782 memset(&rta, 0, sizeof(rta));
1783 for (i = 0; i < RTAX_MAX; i++) {
1784 if (addrs & (1 << i)) {
1785 rta[i] = (struct sockaddr_in6 *)q;
1786 q += ROUNDUP(rta[i]->sin6_len);
1790 trace(1, "rtsock: %s (addrs=%x)\n",
1791 rttypes((struct rt_msghdr *)p), addrs);
1794 i < ((struct rt_msghdr *)p)->rtm_msglen;
1796 fprintf(stderr, "%02x ", p[i] & 0xff);
1797 if (i % 16 == 15) fprintf(stderr, "\n");
1799 fprintf(stderr, "\n");
1805 * We may be able to optimize by using ifm->ifm_index or
1806 * ifam->ifam_index. For simplicity we don't do that here.
1808 switch (((struct rt_msghdr *)p)->rtm_type) {
1820 /* nothing to be done here */
1821 trace(1, "\tnothing to be done, ignored\n");
1826 if (rta[RTAX_DST] == NULL) {
1827 trace(1, "\tno destination, ignored\n");
1830 if (rta[RTAX_DST]->sin6_family != AF_INET6) {
1831 trace(1, "\taf mismatch, ignored\n");
1834 if (IN6_IS_ADDR_LINKLOCAL(&rta[RTAX_DST]->sin6_addr)) {
1835 trace(1, "\tlinklocal destination, ignored\n");
1838 if (IN6_ARE_ADDR_EQUAL(&rta[RTAX_DST]->sin6_addr, &in6addr_loopback)) {
1839 trace(1, "\tloopback destination, ignored\n");
1840 continue; /* Loopback */
1842 if (IN6_IS_ADDR_MULTICAST(&rta[RTAX_DST]->sin6_addr)) {
1843 trace(1, "\tmulticast destination, ignored\n");
1849 switch (((struct rt_msghdr *)p)->rtm_type) {
1857 /* should already be handled */
1858 fatal("rtrecv: never reach here");
1861 if (!rta[RTAX_DST] || !rta[RTAX_GATEWAY]) {
1862 trace(1, "\tsome of dst/gw/netamsk are "
1863 "unavailable, ignored\n");
1866 if ((rtm->rtm_flags & RTF_HOST) != 0) {
1867 mask.sin6_len = sizeof(mask);
1868 memset(&mask.sin6_addr, 0xff,
1869 sizeof(mask.sin6_addr));
1870 rta[RTAX_NETMASK] = &mask;
1871 } else if (!rta[RTAX_NETMASK]) {
1872 trace(1, "\tsome of dst/gw/netamsk are "
1873 "unavailable, ignored\n");
1876 if (rt_del(rta[RTAX_DST], rta[RTAX_GATEWAY],
1877 rta[RTAX_NETMASK]) == 0) {
1878 rtable++; /*just to be sure*/
1883 trace(1, "\tnot supported yet, ignored\n");
1886 if (!rta[RTAX_NETMASK] || !rta[RTAX_IFA]) {
1887 trace(1, "\tno netmask or ifa given, ignored\n");
1890 if (ifam->ifam_index < nindex2ifc)
1891 ifcp = index2ifc[ifam->ifam_index];
1895 trace(1, "\tinvalid ifam_index %d, ignored\n",
1899 if (!rt_deladdr(ifcp, rta[RTAX_IFA], rta[RTAX_NETMASK]))
1907 trace(1, "rtsock: reconfigure interfaces, refresh interface routes\n");
1909 TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
1910 if (ifcp->ifc_cflags & IFC_CHANGED) {
1911 if (ifrt(ifcp, 1)) {
1912 TAILQ_FOREACH(ic, &ifc_head, ifc_next) {
1913 if (ifcp->ifc_index == ic->ifc_index)
1915 if (ic->ifc_flags & IFF_UP)
1916 ripsend(ic, &ic->ifc_ripsin,
1919 /* Reset the flag */
1920 TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
1921 rrt->rrt_rflags &= ~RRTF_CHANGED;
1924 ifcp->ifc_cflags &= ~IFC_CHANGED;
1929 trace(1, "rtsock: read routing table again\n");
1935 * remove specified route from the internal routing table.
1938 rt_del(const struct sockaddr_in6 *sdst,
1939 const struct sockaddr_in6 *sgw,
1940 const struct sockaddr_in6 *smask)
1942 const struct in6_addr *dst = NULL;
1943 const struct in6_addr *gw = NULL;
1945 struct netinfo6 ni6;
1946 struct riprt *rrt = NULL;
1949 if (sdst->sin6_family != AF_INET6) {
1950 trace(1, "\tother AF, ignored\n");
1953 if (IN6_IS_ADDR_LINKLOCAL(&sdst->sin6_addr)
1954 || IN6_ARE_ADDR_EQUAL(&sdst->sin6_addr, &in6addr_loopback)
1955 || IN6_IS_ADDR_MULTICAST(&sdst->sin6_addr)) {
1956 trace(1, "\taddress %s not interesting, ignored\n",
1957 inet6_n2p(&sdst->sin6_addr));
1960 dst = &sdst->sin6_addr;
1961 if (sgw->sin6_family == AF_INET6) {
1963 gw = &sgw->sin6_addr;
1964 prefix = sin6mask2len(smask);
1965 } else if (sgw->sin6_family == AF_LINK) {
1967 * Interface route... a hard case. We need to get the prefix
1968 * length from the kernel, but we now are parsing rtmsg.
1969 * We'll purge matching routes from my list, then get the
1972 struct riprt *longest;
1973 trace(1, "\t%s is an interface route, guessing prefixlen\n",
1976 TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
1977 if (IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,
1979 && IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)) {
1981 || longest->rrt_info.rip6_plen <
1982 rrt->rrt_info.rip6_plen) {
1989 trace(1, "\tno matching interface route found\n");
1992 gw = &in6addr_loopback;
1993 prefix = rrt->rrt_info.rip6_plen;
1995 trace(1, "\tunsupported af: (gw=%d)\n", sgw->sin6_family);
1999 trace(1, "\tdeleting %s/%d ", inet6_n2p(dst), prefix);
2000 trace(1, "gw %s\n", inet6_n2p(gw));
2001 t_lifetime = time(NULL) - RIP_LIFETIME;
2002 /* age route for interface address */
2003 memset(&ni6, 0, sizeof(ni6));
2004 ni6.rip6_dest = *dst;
2005 ni6.rip6_plen = prefix;
2006 applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/
2007 trace(1, "\tfind route %s/%d\n", inet6_n2p(&ni6.rip6_dest),
2009 if (!rrt && (rrt = rtsearch(&ni6)) == NULL) {
2010 trace(1, "\tno route found\n");
2014 if ((rrt->rrt_flags & RTF_STATIC) == 0) {
2015 trace(1, "\tyou can delete static routes only\n");
2018 if (!IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, gw)) {
2019 trace(1, "\tgw mismatch: %s <-> ",
2020 inet6_n2p(&rrt->rrt_gw));
2021 trace(1, "%s\n", inet6_n2p(gw));
2023 trace(1, "\troute found, age it\n");
2024 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) {
2025 rrt->rrt_t = t_lifetime;
2026 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
2033 * remove specified address from internal interface/routing table.
2036 rt_deladdr(struct ifc *ifcp,
2037 const struct sockaddr_in6 *sifa,
2038 const struct sockaddr_in6 *smask)
2040 const struct in6_addr *addr = NULL;
2042 struct ifac *ifac = NULL;
2043 struct netinfo6 ni6;
2044 struct riprt *rrt = NULL;
2048 if (sifa->sin6_family != AF_INET6) {
2049 trace(1, "\tother AF, ignored\n");
2052 addr = &sifa->sin6_addr;
2053 prefix = sin6mask2len(smask);
2055 trace(1, "\tdeleting %s/%d from %s\n",
2056 inet6_n2p(addr), prefix, ifcp->ifc_name);
2057 ifac = ifa_match(ifcp, addr, prefix);
2059 trace(1, "\tno matching ifa found for %s/%d on %s\n",
2060 inet6_n2p(addr), prefix, ifcp->ifc_name);
2063 if (ifac->ifac_ifc != ifcp) {
2064 trace(1, "\taddress table corrupt: back pointer does not match "
2066 ifcp->ifc_name, ifac->ifac_ifc->ifc_name);
2069 TAILQ_REMOVE(&ifcp->ifc_ifac_head, ifac, ifac_next);
2070 t_lifetime = time(NULL) - RIP_LIFETIME;
2071 /* age route for interface address */
2072 memset(&ni6, 0, sizeof(ni6));
2073 ni6.rip6_dest = ifac->ifac_addr;
2074 ni6.rip6_plen = ifac->ifac_plen;
2075 applyplen(&ni6.rip6_dest, ni6.rip6_plen);
2076 trace(1, "\tfind interface route %s/%d on %d\n",
2077 inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, ifcp->ifc_index);
2078 if ((rrt = rtsearch(&ni6)) != NULL) {
2079 struct in6_addr none;
2080 memset(&none, 0, sizeof(none));
2081 if (rrt->rrt_index == ifcp->ifc_index &&
2082 (IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, &none) ||
2083 IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw))) {
2084 trace(1, "\troute found, age it\n");
2085 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) {
2086 rrt->rrt_t = t_lifetime;
2087 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
2091 trace(1, "\tnon-interface route found: %s/%d on %d\n",
2092 inet6_n2p(&rrt->rrt_info.rip6_dest),
2093 rrt->rrt_info.rip6_plen,
2097 trace(1, "\tno interface route found\n");
2098 /* age route for p2p destination */
2099 if (ifcp->ifc_flags & IFF_POINTOPOINT) {
2100 memset(&ni6, 0, sizeof(ni6));
2101 ni6.rip6_dest = ifac->ifac_raddr;
2102 ni6.rip6_plen = 128;
2103 applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/
2104 trace(1, "\tfind p2p route %s/%d on %d\n",
2105 inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen,
2107 if ((rrt = rtsearch(&ni6)) != NULL) {
2108 if (rrt->rrt_index == ifcp->ifc_index &&
2109 IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw,
2110 &ifac->ifac_addr)) {
2111 trace(1, "\troute found, age it\n");
2112 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) {
2113 rrt->rrt_t = t_lifetime;
2114 rrt->rrt_info.rip6_metric =
2119 trace(1, "\tnon-p2p route found: %s/%d on %d\n",
2120 inet6_n2p(&rrt->rrt_info.rip6_dest),
2121 rrt->rrt_info.rip6_plen,
2125 trace(1, "\tno p2p route found\n");
2129 return ((updated) ? 0 : -1);
2133 * Get each interface address and put those interface routes to the route
2137 ifrt(struct ifc *ifcp, int again)
2140 struct riprt *rrt = NULL, *search_rrt, *loop_rrt;
2141 struct netinfo6 *np;
2143 int need_trigger = 0;
2146 if (ifcp->ifc_flags & IFF_LOOPBACK)
2147 return 0; /* ignore loopback */
2150 if (ifcp->ifc_flags & IFF_POINTOPOINT) {
2151 ifrt_p2p(ifcp, again);
2155 TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) {
2156 if (IN6_IS_ADDR_LINKLOCAL(&ifac->ifac_addr)) {
2158 trace(1, "route: %s on %s: "
2159 "skip linklocal interface address\n",
2160 inet6_n2p(&ifac->ifac_addr), ifcp->ifc_name);
2164 if (IN6_IS_ADDR_UNSPECIFIED(&ifac->ifac_addr)) {
2166 trace(1, "route: %s: skip unspec interface address\n",
2171 if (IN6_IS_ADDR_LOOPBACK(&ifac->ifac_addr)) {
2173 trace(1, "route: %s: skip loopback address\n",
2178 if (ifcp->ifc_flags & IFF_UP) {
2179 if ((rrt = MALLOC(struct riprt)) == NULL)
2180 fatal("malloc: struct riprt");
2181 memset(rrt, 0, sizeof(*rrt));
2182 rrt->rrt_same = NULL;
2183 rrt->rrt_index = ifcp->ifc_index;
2184 rrt->rrt_t = 0; /* don't age */
2185 rrt->rrt_info.rip6_dest = ifac->ifac_addr;
2186 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff);
2187 rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric;
2188 rrt->rrt_info.rip6_plen = ifac->ifac_plen;
2189 rrt->rrt_flags = RTF_HOST;
2190 rrt->rrt_rflags |= RRTF_CHANGED;
2191 applyplen(&rrt->rrt_info.rip6_dest, ifac->ifac_plen);
2192 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr));
2193 rrt->rrt_gw = ifac->ifac_addr;
2194 np = &rrt->rrt_info;
2195 search_rrt = rtsearch(np);
2196 if (search_rrt != NULL) {
2197 if (search_rrt->rrt_info.rip6_metric <=
2198 rrt->rrt_info.rip6_metric) {
2199 /* Already have better route */
2201 trace(1, "route: %s/%d: "
2202 "already registered (%s)\n",
2203 inet6_n2p(&np->rip6_dest), np->rip6_plen,
2209 TAILQ_REMOVE(&riprt_head, rrt, rrt_next);
2210 delroute(&rrt->rrt_info, &rrt->rrt_gw);
2212 /* Attach the route to the list */
2213 trace(1, "route: %s/%d: register route (%s)\n",
2214 inet6_n2p(&np->rip6_dest), np->rip6_plen,
2216 TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next);
2217 addroute(rrt, &rrt->rrt_gw, ifcp);
2220 ripsend(ifcp, &ifcp->ifc_ripsin, 0);
2223 TAILQ_FOREACH(loop_rrt, &riprt_head, rrt_next) {
2224 if (loop_rrt->rrt_index == ifcp->ifc_index) {
2225 t_lifetime = time(NULL) - RIP_LIFETIME;
2226 if (loop_rrt->rrt_t == 0 || loop_rrt->rrt_t > t_lifetime) {
2227 loop_rrt->rrt_t = t_lifetime;
2228 loop_rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
2229 loop_rrt->rrt_rflags |= RRTF_CHANGED;
2239 return need_trigger;
2243 * there are couple of p2p interface routing models. "behavior" lets
2244 * you pick one. it looks that gated behavior fits best with BSDs,
2245 * since BSD kernels do not look at prefix length on p2p interfaces.
2248 ifrt_p2p(struct ifc *ifcp, int again)
2251 struct riprt *rrt, *orrt;
2252 struct netinfo6 *np;
2253 struct in6_addr addr, dest;
2254 int advert, ignore, i;
2255 #define P2PADVERT_NETWORK 1
2256 #define P2PADVERT_ADDR 2
2257 #define P2PADVERT_DEST 4
2258 #define P2PADVERT_MAX 4
2259 const enum { CISCO, GATED, ROUTE6D } behavior = GATED;
2260 const char *category = "";
2263 TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) {
2264 addr = ifac->ifac_addr;
2265 dest = ifac->ifac_raddr;
2266 applyplen(&addr, ifac->ifac_plen);
2267 applyplen(&dest, ifac->ifac_plen);
2268 advert = ignore = 0;
2272 * honor addr/plen, just like normal shared medium
2273 * interface. this may cause trouble if you reuse
2274 * addr/plen on other interfaces.
2276 * advertise addr/plen.
2278 advert |= P2PADVERT_NETWORK;
2282 * prefixlen on p2p interface is meaningless.
2283 * advertise addr/128 and dest/128.
2285 * do not install network route to route6d routing
2286 * table (if we do, it would prevent route installation
2287 * for other p2p interface that shares addr/plen).
2289 * XXX what should we do if dest is ::? it will not
2290 * get announced anyways (see following filter),
2291 * but we need to think.
2293 advert |= P2PADVERT_ADDR;
2294 advert |= P2PADVERT_DEST;
2295 ignore |= P2PADVERT_NETWORK;
2299 * just for testing. actually the code is redundant
2300 * given the current p2p interface address assignment
2301 * rule for kame kernel.
2304 * A/n -> announce A/n
2305 * A B/n, A and B share prefix -> A/n (= B/n)
2306 * A B/n, do not share prefix -> A/128 and B/128
2307 * actually, A/64 and A B/128 are the only cases
2308 * permitted by the kernel:
2310 * A B/128 -> A/128 and B/128
2312 if (!IN6_IS_ADDR_UNSPECIFIED(&ifac->ifac_raddr)) {
2313 if (IN6_ARE_ADDR_EQUAL(&addr, &dest))
2314 advert |= P2PADVERT_NETWORK;
2316 advert |= P2PADVERT_ADDR;
2317 advert |= P2PADVERT_DEST;
2318 ignore |= P2PADVERT_NETWORK;
2321 advert |= P2PADVERT_NETWORK;
2325 for (i = 1; i <= P2PADVERT_MAX; i *= 2) {
2326 if ((ignore & i) != 0)
2328 if ((rrt = MALLOC(struct riprt)) == NULL) {
2329 fatal("malloc: struct riprt");
2332 memset(rrt, 0, sizeof(*rrt));
2333 rrt->rrt_same = NULL;
2334 rrt->rrt_index = ifcp->ifc_index;
2335 rrt->rrt_t = 0; /* don't age */
2337 case P2PADVERT_NETWORK:
2338 rrt->rrt_info.rip6_dest = ifac->ifac_addr;
2339 rrt->rrt_info.rip6_plen = ifac->ifac_plen;
2340 applyplen(&rrt->rrt_info.rip6_dest,
2342 category = "network";
2344 case P2PADVERT_ADDR:
2345 rrt->rrt_info.rip6_dest = ifac->ifac_addr;
2346 rrt->rrt_info.rip6_plen = 128;
2347 rrt->rrt_gw = in6addr_loopback;
2350 case P2PADVERT_DEST:
2351 rrt->rrt_info.rip6_dest = ifac->ifac_raddr;
2352 rrt->rrt_info.rip6_plen = 128;
2353 rrt->rrt_gw = ifac->ifac_addr;
2357 if (IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_info.rip6_dest) ||
2358 IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_info.rip6_dest)) {
2360 trace(1, "route: %s: skip unspec/linklocal "
2361 "(%s on %s)\n", category, ifcp->ifc_name);
2366 if ((advert & i) == 0) {
2367 rrt->rrt_rflags |= RRTF_NOADVERTISE;
2371 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff);
2372 rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric;
2373 np = &rrt->rrt_info;
2374 orrt = rtsearch(np);
2376 /* Attach the route to the list */
2377 trace(1, "route: %s/%d: register route "
2379 inet6_n2p(&np->rip6_dest), np->rip6_plen,
2380 category, ifcp->ifc_name, noadv);
2381 TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next);
2382 } else if (rrt->rrt_index != orrt->rrt_index ||
2383 rrt->rrt_info.rip6_metric != orrt->rrt_info.rip6_metric) {
2385 TAILQ_INSERT_BEFORE(orrt, rrt, rrt_next);
2386 TAILQ_REMOVE(&riprt_head, orrt, rrt_next);
2389 trace(1, "route: %s/%d: update (%s on %s%s)\n",
2390 inet6_n2p(&np->rip6_dest), np->rip6_plen,
2391 category, ifcp->ifc_name, noadv);
2395 trace(1, "route: %s/%d: "
2396 "already registered (%s on %s%s)\n",
2397 inet6_n2p(&np->rip6_dest),
2398 np->rip6_plen, category,
2399 ifcp->ifc_name, noadv);
2405 #undef P2PADVERT_NETWORK
2406 #undef P2PADVERT_ADDR
2407 #undef P2PADVERT_DEST
2408 #undef P2PADVERT_MAX
2412 getifmtu(int ifindex)
2417 struct if_msghdr *ifm;
2424 mib[4] = NET_RT_IFLIST;
2426 if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) {
2427 fatal("sysctl estimate NET_RT_IFLIST");
2430 if ((buf = malloc(msize)) == NULL) {
2434 if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) {
2435 fatal("sysctl NET_RT_IFLIST");
2438 ifm = (struct if_msghdr *)buf;
2439 mtu = ifm->ifm_data.ifi_mtu;
2440 if (ifindex != ifm->ifm_index) {
2441 fatal("ifindex does not match with ifm_index");
2449 rttypes(struct rt_msghdr *rtm)
2451 #define RTTYPE(s, f) \
2453 if (rtm->rtm_type == (f)) \
2456 RTTYPE("ADD", RTM_ADD);
2457 RTTYPE("DELETE", RTM_DELETE);
2458 RTTYPE("CHANGE", RTM_CHANGE);
2459 RTTYPE("GET", RTM_GET);
2460 RTTYPE("LOSING", RTM_LOSING);
2461 RTTYPE("REDIRECT", RTM_REDIRECT);
2462 RTTYPE("MISS", RTM_MISS);
2463 RTTYPE("LOCK", RTM_LOCK);
2464 RTTYPE("NEWADDR", RTM_NEWADDR);
2465 RTTYPE("DELADDR", RTM_DELADDR);
2466 RTTYPE("IFINFO", RTM_IFINFO);
2468 RTTYPE("OIFINFO", RTM_OIFINFO);
2470 #ifdef RTM_IFANNOUNCE
2471 RTTYPE("IFANNOUNCE", RTM_IFANNOUNCE);
2474 RTTYPE("NEWMADDR", RTM_NEWMADDR);
2477 RTTYPE("DELMADDR", RTM_DELMADDR);
2484 rtflags(struct rt_msghdr *rtm)
2486 static char buf[BUFSIZ];
2489 * letter conflict should be okay. painful when *BSD diverges...
2491 strlcpy(buf, "", sizeof(buf));
2492 #define RTFLAG(s, f) \
2494 if (rtm->rtm_flags & (f)) \
2495 strlcat(buf, (s), sizeof(buf)); \
2497 RTFLAG("U", RTF_UP);
2498 RTFLAG("G", RTF_GATEWAY);
2499 RTFLAG("H", RTF_HOST);
2500 RTFLAG("R", RTF_REJECT);
2501 RTFLAG("D", RTF_DYNAMIC);
2502 RTFLAG("M", RTF_MODIFIED);
2503 RTFLAG("d", RTF_DONE);
2505 RTFLAG("m", RTF_MASK);
2508 RTFLAG("c", RTF_CLONED);
2510 RTFLAG("X", RTF_XRESOLVE);
2512 RTFLAG("L", RTF_LLINFO);
2514 RTFLAG("S", RTF_STATIC);
2515 RTFLAG("B", RTF_BLACKHOLE);
2517 RTFLAG("3", RTF_PROTO3);
2519 RTFLAG("2", RTF_PROTO2);
2520 RTFLAG("1", RTF_PROTO1);
2521 #ifdef RTF_BROADCAST
2522 RTFLAG("b", RTF_BROADCAST);
2525 RTFLAG("d", RTF_DEFAULT);
2527 #ifdef RTF_ISAROUTER
2528 RTFLAG("r", RTF_ISAROUTER);
2531 RTFLAG("T", RTF_TUNNEL);
2534 RTFLAG("A", RTF_AUTH);
2537 RTFLAG("E", RTF_CRYPT);
2546 static char buf[BUFSIZ];
2548 strlcpy(buf, "", sizeof(buf));
2549 #define IFFLAG(s, f) \
2551 if (flags & (f)) { \
2553 strlcat(buf, ",", sizeof(buf)); \
2554 strlcat(buf, (s), sizeof(buf)); \
2557 IFFLAG("UP", IFF_UP);
2558 IFFLAG("BROADCAST", IFF_BROADCAST);
2559 IFFLAG("DEBUG", IFF_DEBUG);
2560 IFFLAG("LOOPBACK", IFF_LOOPBACK);
2561 IFFLAG("POINTOPOINT", IFF_POINTOPOINT);
2562 #ifdef IFF_NOTRAILERS
2563 IFFLAG("NOTRAILERS", IFF_NOTRAILERS);
2566 IFFLAG("SMART", IFF_SMART);
2568 IFFLAG("RUNNING", IFF_RUNNING);
2569 IFFLAG("NOARP", IFF_NOARP);
2570 IFFLAG("PROMISC", IFF_PROMISC);
2571 IFFLAG("ALLMULTI", IFF_ALLMULTI);
2572 IFFLAG("OACTIVE", IFF_OACTIVE);
2573 IFFLAG("SIMPLEX", IFF_SIMPLEX);
2574 IFFLAG("LINK0", IFF_LINK0);
2575 IFFLAG("LINK1", IFF_LINK1);
2576 IFFLAG("LINK2", IFF_LINK2);
2577 IFFLAG("MULTICAST", IFF_MULTICAST);
2587 char *buf, *p, *lim;
2588 struct rt_msghdr *rtm;
2597 mib[3] = AF_INET6; /* Address family */
2598 mib[4] = NET_RT_DUMP; /* Dump the kernel routing table */
2599 mib[5] = 0; /* No flags */
2609 if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) {
2610 errmsg = "sysctl estimate";
2613 if ((buf = malloc(msize)) == NULL) {
2617 if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) {
2618 errmsg = "sysctl NET_RT_DUMP";
2621 } while (retry < RT_DUMP_MAXRETRY && errmsg != NULL);
2623 fatal("%s (with %d retries, msize=%lu)", errmsg, retry,
2626 } else if (1 < retry)
2627 syslog(LOG_INFO, "NET_RT_DUMP %d retires", retry);
2630 for (p = buf; p < lim; p += rtm->rtm_msglen) {
2631 rtm = (struct rt_msghdr *)p;
2632 rt_entry(rtm, again);
2638 rt_entry(struct rt_msghdr *rtm, int again)
2640 struct sockaddr_in6 *sin6_dst, *sin6_gw, *sin6_mask;
2641 struct sockaddr_in6 *sin6_genmask, *sin6_ifp;
2642 char *rtmp, *ifname = NULL;
2643 struct riprt *rrt, *orrt;
2644 struct netinfo6 *np;
2647 sin6_dst = sin6_gw = sin6_mask = sin6_genmask = sin6_ifp = 0;
2648 if ((rtm->rtm_flags & RTF_UP) == 0 || rtm->rtm_flags &
2649 (RTF_XRESOLVE|RTF_BLACKHOLE)) {
2650 return; /* not interested in the link route */
2652 /* do not look at cloned routes */
2653 #ifdef RTF_WASCLONED
2654 if (rtm->rtm_flags & RTF_WASCLONED)
2658 if (rtm->rtm_flags & RTF_CLONED)
2661 /* XXX: Ignore connected routes. */
2662 if (!(rtm->rtm_flags & (RTF_GATEWAY|RTF_HOST|RTF_STATIC)))
2665 * do not look at dynamic routes.
2666 * netbsd/openbsd cloned routes have UGHD.
2668 if (rtm->rtm_flags & RTF_DYNAMIC)
2670 rtmp = (char *)(rtm + 1);
2672 if ((rtm->rtm_addrs & RTA_DST) == 0)
2673 return; /* ignore routes without destination address */
2674 sin6_dst = (struct sockaddr_in6 *)rtmp;
2675 rtmp += ROUNDUP(sin6_dst->sin6_len);
2676 if (rtm->rtm_addrs & RTA_GATEWAY) {
2677 sin6_gw = (struct sockaddr_in6 *)rtmp;
2678 rtmp += ROUNDUP(sin6_gw->sin6_len);
2680 if (rtm->rtm_addrs & RTA_NETMASK) {
2681 sin6_mask = (struct sockaddr_in6 *)rtmp;
2682 rtmp += ROUNDUP(sin6_mask->sin6_len);
2684 if (rtm->rtm_addrs & RTA_GENMASK) {
2685 sin6_genmask = (struct sockaddr_in6 *)rtmp;
2686 rtmp += ROUNDUP(sin6_genmask->sin6_len);
2688 if (rtm->rtm_addrs & RTA_IFP) {
2689 sin6_ifp = (struct sockaddr_in6 *)rtmp;
2690 rtmp += ROUNDUP(sin6_ifp->sin6_len);
2694 if (sin6_dst->sin6_family != AF_INET6)
2696 if (IN6_IS_ADDR_LINKLOCAL(&sin6_dst->sin6_addr))
2697 return; /* Link-local */
2698 if (IN6_ARE_ADDR_EQUAL(&sin6_dst->sin6_addr, &in6addr_loopback))
2699 return; /* Loopback */
2700 if (IN6_IS_ADDR_MULTICAST(&sin6_dst->sin6_addr))
2703 if ((rrt = MALLOC(struct riprt)) == NULL) {
2704 fatal("malloc: struct riprt");
2707 memset(rrt, 0, sizeof(*rrt));
2708 np = &rrt->rrt_info;
2709 rrt->rrt_same = NULL;
2710 rrt->rrt_t = time(NULL);
2711 if (aflag == 0 && (rtm->rtm_flags & RTF_STATIC))
2712 rrt->rrt_t = 0; /* Don't age static routes */
2713 if (rtm->rtm_flags & Pflag)
2714 rrt->rrt_t = 0; /* Don't age PROTO[123] routes */
2715 if ((rtm->rtm_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST)
2716 rrt->rrt_t = 0; /* Don't age non-gateway host routes */
2718 np->rip6_metric = rtm->rtm_rmx.rmx_hopcount;
2719 if (np->rip6_metric < 1)
2720 np->rip6_metric = 1;
2721 rrt->rrt_flags = rtm->rtm_flags;
2722 np->rip6_dest = sin6_dst->sin6_addr;
2725 if (rtm->rtm_flags & RTF_HOST)
2726 np->rip6_plen = 128; /* Host route */
2728 np->rip6_plen = sin6mask2len(sin6_mask);
2732 orrt = rtsearch(np);
2733 if (orrt && orrt->rrt_info.rip6_metric != HOPCNT_INFINITY6) {
2736 trace(1, "route: %s/%d flags %s: already registered\n",
2737 inet6_n2p(&np->rip6_dest), np->rip6_plen,
2745 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr));
2747 if (sin6_gw->sin6_family == AF_INET6)
2748 rrt->rrt_gw = sin6_gw->sin6_addr;
2749 else if (sin6_gw->sin6_family == AF_LINK) {
2750 /* XXX in case ppp link? */
2751 rrt->rrt_gw = in6addr_loopback;
2753 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr));
2755 trace(1, "route: %s/%d flags %s",
2756 inet6_n2p(&np->rip6_dest), np->rip6_plen, rtflags(rtm));
2757 trace(1, " gw %s", inet6_n2p(&rrt->rrt_gw));
2760 ifindex = rtm->rtm_index;
2761 if ((unsigned int)ifindex < nindex2ifc && index2ifc[ifindex])
2762 ifname = index2ifc[ifindex]->ifc_name;
2764 trace(1, " not configured\n");
2768 trace(1, " if %s sock %d", ifname, ifindex);
2769 rrt->rrt_index = ifindex;
2774 if (!IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_gw) &&
2775 !IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw) &&
2776 (rrt->rrt_flags & RTF_LOCAL) == 0) {
2777 trace(0, "***** Gateway %s is not a link-local address.\n",
2778 inet6_n2p(&rrt->rrt_gw));
2779 trace(0, "***** dest(%s) if(%s) -- Not optimized.\n",
2780 inet6_n2p(&rrt->rrt_info.rip6_dest), ifname);
2781 rrt->rrt_rflags |= RRTF_NH_NOT_LLADDR;
2784 /* Put it to the route list */
2785 if (orrt && orrt->rrt_info.rip6_metric == HOPCNT_INFINITY6) {
2786 /* replace route list */
2787 TAILQ_INSERT_BEFORE(orrt, rrt, rrt_next);
2788 TAILQ_REMOVE(&riprt_head, orrt, rrt_next);
2790 trace(1, "route: %s/%d flags %s: replace new route\n",
2791 inet6_n2p(&np->rip6_dest), np->rip6_plen,
2795 TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next);
2799 addroute(struct riprt *rrt,
2800 const struct in6_addr *gw,
2803 struct netinfo6 *np;
2804 u_char buf[BUFSIZ], buf1[BUFSIZ], buf2[BUFSIZ];
2805 struct rt_msghdr *rtm;
2806 struct sockaddr_in6 *sin6;
2809 np = &rrt->rrt_info;
2810 inet_ntop(AF_INET6, (const void *)gw, (char *)buf1, sizeof(buf1));
2811 inet_ntop(AF_INET6, (void *)&ifcp->ifc_mylladdr, (char *)buf2, sizeof(buf2));
2812 tracet(1, "ADD: %s/%d gw %s [%d] ifa %s\n",
2813 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1,
2814 np->rip6_metric - 1, buf2);
2816 fprintf(rtlog, "%s: ADD: %s/%d gw %s [%d] ifa %s\n", hms(),
2817 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1,
2818 np->rip6_metric - 1, buf2);
2822 memset(buf, 0, sizeof(buf));
2823 rtm = (struct rt_msghdr *)buf;
2824 rtm->rtm_type = RTM_ADD;
2825 rtm->rtm_version = RTM_VERSION;
2826 rtm->rtm_seq = ++seq;
2828 rtm->rtm_flags = rrt->rrt_flags;
2829 rtm->rtm_flags |= Qflag;
2830 rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
2831 rtm->rtm_rmx.rmx_hopcount = np->rip6_metric - 1;
2832 rtm->rtm_inits = RTV_HOPCOUNT;
2833 sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)];
2835 sin6->sin6_len = sizeof(struct sockaddr_in6);
2836 sin6->sin6_family = AF_INET6;
2837 sin6->sin6_addr = np->rip6_dest;
2838 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
2840 sin6->sin6_len = sizeof(struct sockaddr_in6);
2841 sin6->sin6_family = AF_INET6;
2842 sin6->sin6_addr = *gw;
2843 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
2844 sin6->sin6_scope_id = ifcp->ifc_index;
2845 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
2847 sin6->sin6_len = sizeof(struct sockaddr_in6);
2848 sin6->sin6_family = AF_INET6;
2849 sin6->sin6_addr = *(plen2mask(np->rip6_plen));
2850 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
2852 len = (char *)sin6 - (char *)buf;
2853 rtm->rtm_msglen = len;
2854 if (write(rtsock, buf, len) > 0)
2857 if (errno == EEXIST) {
2858 trace(0, "ADD: Route already exists %s/%d gw %s\n",
2859 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1);
2861 fprintf(rtlog, "ADD: Route already exists %s/%d gw %s\n",
2862 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1);
2864 trace(0, "Can not write to rtsock (addroute): %s\n",
2867 fprintf(rtlog, "\tCan not write to rtsock: %s\n",
2874 delroute(struct netinfo6 *np, struct in6_addr *gw)
2876 u_char buf[BUFSIZ], buf2[BUFSIZ];
2877 struct rt_msghdr *rtm;
2878 struct sockaddr_in6 *sin6;
2881 inet_ntop(AF_INET6, (void *)gw, (char *)buf2, sizeof(buf2));
2882 tracet(1, "DEL: %s/%d gw %s\n", inet6_n2p(&np->rip6_dest),
2883 np->rip6_plen, buf2);
2885 fprintf(rtlog, "%s: DEL: %s/%d gw %s\n",
2886 hms(), inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2);
2890 memset(buf, 0, sizeof(buf));
2891 rtm = (struct rt_msghdr *)buf;
2892 rtm->rtm_type = RTM_DELETE;
2893 rtm->rtm_version = RTM_VERSION;
2894 rtm->rtm_seq = ++seq;
2896 rtm->rtm_flags = RTF_UP | RTF_GATEWAY;
2897 rtm->rtm_flags |= Qflag;
2898 if (np->rip6_plen == sizeof(struct in6_addr) * 8)
2899 rtm->rtm_flags |= RTF_HOST;
2900 rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
2901 sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)];
2903 sin6->sin6_len = sizeof(struct sockaddr_in6);
2904 sin6->sin6_family = AF_INET6;
2905 sin6->sin6_addr = np->rip6_dest;
2906 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
2908 sin6->sin6_len = sizeof(struct sockaddr_in6);
2909 sin6->sin6_family = AF_INET6;
2910 sin6->sin6_addr = *gw;
2911 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
2913 sin6->sin6_len = sizeof(struct sockaddr_in6);
2914 sin6->sin6_family = AF_INET6;
2915 sin6->sin6_addr = *(plen2mask(np->rip6_plen));
2916 sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len));
2918 len = (char *)sin6 - (char *)buf;
2919 rtm->rtm_msglen = len;
2920 if (write(rtsock, buf, len) >= 0)
2923 if (errno == ESRCH) {
2924 trace(0, "RTDEL: Route does not exist: %s/%d gw %s\n",
2925 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2);
2927 fprintf(rtlog, "RTDEL: Route does not exist: %s/%d gw %s\n",
2928 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2);
2930 trace(0, "Can not write to rtsock (delroute): %s\n",
2933 fprintf(rtlog, "\tCan not write to rtsock: %s\n",
2940 getroute(struct netinfo6 *np, struct in6_addr *gw)
2945 struct rt_msghdr *rtm;
2946 struct sockaddr_in6 *sin6;
2948 rtm = (struct rt_msghdr *)buf;
2949 len = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in6);
2950 memset(rtm, 0, len);
2951 rtm->rtm_type = RTM_GET;
2952 rtm->rtm_version = RTM_VERSION;
2954 rtm->rtm_seq = myseq;
2955 rtm->rtm_addrs = RTA_DST;
2956 rtm->rtm_msglen = len;
2957 sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)];
2958 sin6->sin6_len = sizeof(struct sockaddr_in6);
2959 sin6->sin6_family = AF_INET6;
2960 sin6->sin6_addr = np->rip6_dest;
2961 if (write(rtsock, buf, len) < 0) {
2962 if (errno == ESRCH) /* No such route found */
2964 perror("write to rtsock");
2968 if ((len = read(rtsock, buf, sizeof(buf))) < 0) {
2969 perror("read from rtsock");
2972 rtm = (struct rt_msghdr *)buf;
2973 } while (rtm->rtm_seq != myseq || rtm->rtm_pid != pid);
2974 sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)];
2975 if (rtm->rtm_addrs & RTA_DST) {
2976 sin6 = (struct sockaddr_in6 *)
2977 ((char *)sin6 + ROUNDUP(sin6->sin6_len));
2979 if (rtm->rtm_addrs & RTA_GATEWAY) {
2980 *gw = sin6->sin6_addr;
2987 inet6_n2p(const struct in6_addr *p)
2989 static char buf[BUFSIZ];
2991 return inet_ntop(AF_INET6, (const void *)p, buf, sizeof(buf));
3012 if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL)
3015 fprintf(dump, "%s: Interface Table Dump\n", hms());
3016 TAILQ_FOREACH(ifcp, &ifc_head, ifc_next)
3018 fprintf(dump, " Number of interfaces: %d\n", nifc);
3020 fprintf(dump, " advertising interfaces:\n");
3021 TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
3022 if ((ifcp->ifc_flags & IFF_UP) == 0)
3024 if (iff_find(ifcp, IFIL_TYPE_N) != NULL)
3026 ifdump0(dump, ifcp);
3028 fprintf(dump, "\n");
3029 fprintf(dump, " non-advertising interfaces:\n");
3030 TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
3031 if ((ifcp->ifc_flags & IFF_UP) &&
3032 (iff_find(ifcp, IFIL_TYPE_N) == NULL))
3034 ifdump0(dump, ifcp);
3036 fprintf(dump, "\n");
3042 ifdump0(FILE *dump, const struct ifc *ifcp)
3050 fprintf(dump, " %s: index(%d) flags(%s) addr(%s) mtu(%d) metric(%d)\n",
3051 ifcp->ifc_name, ifcp->ifc_index, ifflags(ifcp->ifc_flags),
3052 inet6_n2p(&ifcp->ifc_mylladdr),
3053 ifcp->ifc_mtu, ifcp->ifc_metric);
3054 TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) {
3055 if (ifcp->ifc_flags & IFF_POINTOPOINT) {
3056 inet_ntop(AF_INET6, (void *)&ifac->ifac_raddr,
3058 fprintf(dump, "\t%s/%d -- %s\n",
3059 inet6_n2p(&ifac->ifac_addr),
3060 ifac->ifac_plen, buf);
3062 fprintf(dump, "\t%s/%d\n",
3063 inet6_n2p(&ifac->ifac_addr),
3068 fprintf(dump, "\tFilter:\n");
3069 TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
3071 switch (iffp->iff_type) {
3073 ft = "Aggregate"; addr++; break;
3075 ft = "No-use"; break;
3077 ft = "Advertise-only"; addr++; break;
3079 ft = "Default-only"; break;
3081 ft = "Listen-only"; addr++; break;
3083 snprintf(buf, sizeof(buf), "Unknown-%c", iffp->iff_type);
3088 fprintf(dump, "\t\t%s", ft);
3090 fprintf(dump, "(%s/%d)", inet6_n2p(&iffp->iff_addr),
3092 fprintf(dump, "\n");
3094 fprintf(dump, "\n");
3108 if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL)
3112 fprintf(dump, "\n%s: Routing Table Dump\n", hms());
3113 TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
3114 if (rrt->rrt_t == 0)
3117 age = t - rrt->rrt_t;
3118 inet_ntop(AF_INET6, (void *)&rrt->rrt_info.rip6_dest,
3120 fprintf(dump, " %s/%d if(%d:%s) gw(%s) [%d] age(%ld)",
3121 buf, rrt->rrt_info.rip6_plen, rrt->rrt_index,
3122 index2ifc[rrt->rrt_index]->ifc_name,
3123 inet6_n2p(&rrt->rrt_gw),
3124 rrt->rrt_info.rip6_metric, (long)age);
3125 if (rrt->rrt_info.rip6_tag) {
3126 fprintf(dump, " tag(0x%04x)",
3127 ntohs(rrt->rrt_info.rip6_tag) & 0xffff);
3129 if (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR)
3130 fprintf(dump, " NOT-LL");
3131 if (rrt->rrt_rflags & RRTF_NOADVERTISE)
3132 fprintf(dump, " NO-ADV");
3133 fprintf(dump, "\n");
3135 fprintf(dump, "\n");
3141 * Parse the -A (and -O) options and put corresponding filter object to the
3142 * specified interface structures. Each of the -A/O option has the following
3143 * syntax: -A 5f09:c400::/32,ef0,ef1 (aggregate)
3144 * -O 5f09:c400::/32,ef0,ef1 (only when match)
3150 char *p, *ap, *iflp, *ifname, *ep;
3151 struct iff iff, *iffp;
3159 for (i = 0; i < nfilter; i++) {
3163 memset(iffp, 0, sizeof(*iffp));
3164 if (filtertype[i] == 'N' || filtertype[i] == 'T') {
3168 if ((p = strchr(ap, ',')) != NULL) {
3172 if ((p = strchr(ap, '/')) == NULL) {
3173 fatal("no prefixlen specified for '%s'", ap);
3177 if (inet_pton(AF_INET6, ap, &iffp->iff_addr) != 1) {
3178 fatal("invalid prefix specified for '%s'", ap);
3183 plen = strtoul(p, &ep, 10);
3184 if (errno || !*p || *ep || plen > sizeof(iffp->iff_addr) * 8) {
3185 fatal("invalid prefix length specified for '%s'", ap);
3188 iffp->iff_plen = plen;
3189 applyplen(&iffp->iff_addr, iffp->iff_plen);
3191 iffp->iff_type = filtertype[i];
3192 if (iflp == NULL || *iflp == '\0') {
3193 fatal("no interface specified for '%s'", ap);
3196 /* parse the interface listing portion */
3199 if ((iflp = strchr(iflp, ',')) != NULL)
3202 TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
3203 if (fnmatch(ifname, ifcp->ifc_name, 0) != 0)
3206 iffp = malloc(sizeof(*iffp));
3208 fatal("malloc of iff");
3211 memcpy(iffp, &iff, sizeof(*iffp));
3213 syslog(LOG_INFO, "Add filter: type %d, ifname %s.", iffp->iff_type, ifname);
3215 TAILQ_INSERT_HEAD(&ifcp->ifc_iff_head, iffp, iff_next);
3220 * -A: aggregate configuration.
3222 if (filtertype[i] != IFIL_TYPE_A)
3224 /* put the aggregate to the kernel routing table */
3225 rrt = (struct riprt *)malloc(sizeof(struct riprt));
3227 fatal("malloc: rrt");
3230 memset(rrt, 0, sizeof(struct riprt));
3231 rrt->rrt_info.rip6_dest = iff.iff_addr;
3232 rrt->rrt_info.rip6_plen = iff.iff_plen;
3233 rrt->rrt_info.rip6_metric = 1;
3234 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff);
3235 rrt->rrt_gw = in6addr_loopback;
3236 rrt->rrt_flags = RTF_UP | RTF_REJECT;
3237 rrt->rrt_rflags = RRTF_AGGREGATE;
3239 rrt->rrt_index = loopifcp->ifc_index;
3241 if (getroute(&rrt->rrt_info, &gw)) {
3244 * When the address has already been registered in the
3245 * kernel routing table, it should be removed
3247 delroute(&rrt->rrt_info, &gw);
3249 /* it is safer behavior */
3251 fatal("%s/%u already in routing table, "
3253 inet6_n2p(&rrt->rrt_info.rip6_dest),
3254 rrt->rrt_info.rip6_plen);
3259 /* Put the route to the list */
3260 TAILQ_INSERT_HEAD(&riprt_head, rrt, rrt_next);
3261 trace(1, "Aggregate: %s/%d for %s\n",
3262 inet6_n2p(&iff.iff_addr), iff.iff_plen,
3263 loopifcp->ifc_name);
3264 /* Add this route to the kernel */
3265 if (nflag) /* do not modify kernel routing table */
3267 addroute(rrt, &in6addr_loopback, loopifcp);
3271 /***************** utility functions *****************/
3274 * Returns a pointer to ifac whose address and prefix length matches
3275 * with the address and prefix length specified in the arguments.
3278 ifa_match(const struct ifc *ifcp,
3279 const struct in6_addr *ia,
3284 TAILQ_FOREACH(ifac, &ifcp->ifc_ifac_head, ifac_next) {
3285 if (IN6_ARE_ADDR_EQUAL(&ifac->ifac_addr, ia) &&
3286 ifac->ifac_plen == plen)
3294 * Return a pointer to riprt structure whose address and prefix length
3295 * matches with the address and prefix length found in the argument.
3296 * Note: This is not a rtalloc(). Therefore exact match is necessary.
3299 rtsearch(struct netinfo6 *np)
3303 TAILQ_FOREACH(rrt, &riprt_head, rrt_next) {
3304 if (rrt->rrt_info.rip6_plen == np->rip6_plen &&
3305 IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,
3314 sin6mask2len(const struct sockaddr_in6 *sin6)
3317 return mask2len(&sin6->sin6_addr,
3318 sin6->sin6_len - offsetof(struct sockaddr_in6, sin6_addr));
3322 mask2len(const struct in6_addr *addr, int lenlim)
3325 const u_char *p = (const u_char *)addr;
3327 for (j = 0; j < lenlim; j++, p++) {
3334 #define MASKLEN(m, l) case m: do { i += l; break; } while (0)
3335 MASKLEN(0xfe, 7); break;
3336 MASKLEN(0xfc, 6); break;
3337 MASKLEN(0xf8, 5); break;
3338 MASKLEN(0xf0, 4); break;
3339 MASKLEN(0xe0, 3); break;
3340 MASKLEN(0xc0, 2); break;
3341 MASKLEN(0x80, 1); break;
3349 applymask(struct in6_addr *addr, struct in6_addr *mask)
3354 p = (u_long *)addr; q = (u_long *)mask;
3355 for (i = 0; i < 4; i++)
3359 static const u_char plent[8] = {
3360 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe
3364 applyplen(struct in6_addr *ia, int plen)
3370 for (i = 0; i < 16; i++) {
3379 static const int pl2m[9] = {
3380 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff
3386 static struct in6_addr ia;
3390 memset(&ia, 0, sizeof(struct in6_addr));
3392 for (i = 0; i < 16; i++, p++, n -= 8) {
3406 int len = strlen(p) + 1;
3407 char *q = (char *)malloc(len);
3421 static char buf[BUFSIZ];
3426 if ((tm = localtime(&t)) == 0) {
3430 snprintf(buf, sizeof(buf), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min,
3435 #define RIPRANDDEV 1.0 /* 30 +- 15, max - min = 30 */
3438 ripinterval(int timer)
3442 interval = (int)(timer + timer * RIPRANDDEV * (r / RAND_MAX - 0.5));
3443 nextalarm = time(NULL) + interval;
3453 t = (int)(RIP_TRIG_INT6_MIN +
3454 (RIP_TRIG_INT6_MAX - RIP_TRIG_INT6_MIN) * (r / RAND_MAX));
3455 sup_trig_update = time(NULL) + t;
3461 fatal(const char *fmt, ...)
3463 fatal(fmt, va_alist)
3476 vsnprintf(buf, sizeof(buf), fmt, ap);
3480 syslog(LOG_ERR, "%s: %s", buf, strerror(errno));
3482 syslog(LOG_ERR, "%s", buf);
3488 tracet(int level, const char *fmt, ...)
3490 tracet(level, fmt, va_alist)
3498 if (level <= dflag) {
3504 fprintf(stderr, "%s: ", hms());
3505 vfprintf(stderr, fmt, ap);
3515 vsyslog(LOG_DEBUG, fmt, ap);
3517 vsyslog(LOG_WARNING, fmt, ap);
3524 trace(int level, const char *fmt, ...)
3526 trace(level, fmt, va_alist)
3534 if (level <= dflag) {
3540 vfprintf(stderr, fmt, ap);
3550 vsyslog(LOG_DEBUG, fmt, ap);
3552 vsyslog(LOG_WARNING, fmt, ap);
3560 struct if_nameindex *p, *p0;
3561 unsigned int max = 0;
3563 p0 = if_nameindex();
3564 for (p = p0; p && p->if_index && p->if_name; p++) {
3565 if (max < p->if_index)
3568 if_freenameindex(p0);
3573 ifc_find(char *name)
3577 TAILQ_FOREACH(ifcp, &ifc_head, ifc_next) {
3578 if (strcmp(name, ifcp->ifc_name) == 0)
3585 iff_find(struct ifc *ifcp, int type)
3589 TAILQ_FOREACH(iffp, &ifcp->ifc_iff_head, iff_next) {
3590 if (type == IFIL_TYPE_ANY ||
3591 type == iffp->iff_type)
3599 setindex2ifc(int idx, struct ifc *ifcp)
3605 nindex2ifc = 5; /*initial guess*/
3606 index2ifc = (struct ifc **)
3607 malloc(sizeof(*index2ifc) * nindex2ifc);
3608 if (index2ifc == NULL) {
3612 memset(index2ifc, 0, sizeof(*index2ifc) * nindex2ifc);
3615 for (nsize = nindex2ifc; nsize <= idx; nsize *= 2)
3618 p = (struct ifc **)realloc(index2ifc,
3619 sizeof(*index2ifc) * nsize);
3624 memset(p + n, 0, sizeof(*index2ifc) * (nindex2ifc - n));
3628 index2ifc[idx] = ifcp;