2 * Copyright (c) 1983, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
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.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 static const char copyright[] =
32 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95";
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
45 #include <sys/param.h>
47 #include <sys/socket.h>
48 #include <sys/ioctl.h>
49 #include <sys/sysctl.h>
50 #include <sys/types.h>
51 #include <sys/queue.h>
54 #include <net/route.h>
55 #include <net/if_dl.h>
56 #include <netinet/in.h>
57 #include <netinet/if_ether.h>
58 #include <arpa/inet.h>
75 TAILQ_ENTRY(fibl) fl_next;
82 static struct keytab {
85 } const keywords[] = {
90 static struct sockaddr_storage so[RTAX_MAX];
91 static int pid, rtm_addrs;
93 static int nflag, af, qflag, tflag;
94 static int verbose, aflen;
95 static int locking, lockrest, debugonly;
96 static struct rt_metrics rt_metrics;
97 static u_long rtm_inits;
99 static int defaultfib;
101 static char domain[MAXHOSTNAMELEN + 1];
102 static bool domain_initialized;
104 static char rt_line[NI_MAXHOST];
105 static char net_line[MAXHOSTNAMELEN + 1];
108 struct rt_msghdr m_rtm;
112 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head;
114 static void printb(int, const char *);
115 static void flushroutes(int argc, char *argv[]);
116 static int flushroutes_fib(int);
117 static int getaddr(int, char *, struct hostent **, int);
118 static int keyword(const char *);
120 static void inet_makenetandmask(u_long, struct sockaddr_in *,
121 struct sockaddr_in *, u_long);
124 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *);
126 static void interfaces(void);
127 static void monitor(int, char*[]);
128 static const char *netname(struct sockaddr *);
129 static void newroute(int, char **);
130 static int newroute_fib(int, char *, int);
131 static void pmsg_addrs(char *, int, size_t);
132 static void pmsg_common(struct rt_msghdr *, size_t);
133 static int prefixlen(const char *);
134 static void print_getmsg(struct rt_msghdr *, int, int);
135 static void print_rtmsg(struct rt_msghdr *, size_t);
136 static const char *routename(struct sockaddr *);
137 static int rtmsg(int, int, int);
138 static void set_metric(char *, int);
139 static int set_sofib(int);
140 static void sockaddr(char *, struct sockaddr *, size_t);
141 static void sodump(struct sockaddr *, const char *);
142 static int fiboptlist_csv(const char *, struct fibl_head_t *);
143 static int fiboptlist_range(const char *, struct fibl_head_t *);
145 static void usage(const char *) __dead2;
148 usage(const char *cp)
151 warnx("bad keyword: %s", cp);
152 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]");
157 main(int argc, char **argv)
165 while ((ch = getopt(argc, argv, "46nqdtv")) != -1)
170 aflen = sizeof(struct sockaddr_in);
172 errx(1, "IPv4 support is not compiled in");
178 aflen = sizeof(struct sockaddr_in6);
180 errx(1, "IPv6 support is not compiled in");
208 s = open(_PATH_DEVNULL, O_WRONLY, 0);
210 s = socket(PF_ROUTE, SOCK_RAW, 0);
212 err(EX_OSERR, "socket");
214 len = sizeof(numfibs);
215 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1)
218 len = sizeof(defaultfib);
220 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL,
225 switch (keyword(*argv)) {
235 newroute(argc, argv);
243 flushroutes(argc, argv);
257 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib,
262 fiboptlist_range(const char *arg, struct fibl_head_t *flh)
265 char *str0, *str, *token, *endptr;
266 int fib[2], i, error;
268 str0 = str = strdup(arg);
271 while ((token = strsep(&str, "-")) != NULL) {
276 fib[i] = strtol(token, &endptr, 0);
278 if (*endptr != '\0' ||
280 (numfibs != -1 && fib[i] > numfibs - 1))
290 goto fiboptlist_range_ret;
293 if (fib[0] >= fib[1]) {
295 goto fiboptlist_range_ret;
297 for (i = fib[0]; i <= fib[1]; i++) {
298 fl = calloc(1, sizeof(*fl));
301 goto fiboptlist_range_ret;
304 TAILQ_INSERT_TAIL(flh, fl, fl_next);
306 fiboptlist_range_ret:
313 fiboptlist_csv(const char *arg, struct fibl_head_t *flh)
316 char *str0, *str, *token, *endptr;
320 if (strcmp("all", arg) == 0) {
321 str = calloc(1, ALLSTRLEN);
324 goto fiboptlist_csv_ret;
327 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1);
329 snprintf(str, ALLSTRLEN - 1, "%d", 0);
330 } else if (strcmp("default", arg) == 0) {
331 str0 = str = calloc(1, ALLSTRLEN);
334 goto fiboptlist_csv_ret;
336 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib);
338 str0 = str = strdup(arg);
341 while ((token = strsep(&str, ",")) != NULL) {
342 if (*token != '-' && strchr(token, '-') != NULL) {
343 error = fiboptlist_range(token, flh);
345 goto fiboptlist_csv_ret;
348 fib = strtol(token, &endptr, 0);
350 if (*endptr != '\0' ||
352 (numfibs != -1 && fib > numfibs - 1))
357 goto fiboptlist_csv_ret;
359 fl = calloc(1, sizeof(*fl));
362 goto fiboptlist_csv_ret;
365 TAILQ_INSERT_TAIL(flh, fl, fl_next);
375 * Purge all entries in the routing tables not
376 * associated with network interfaces.
379 flushroutes(int argc, char *argv[])
384 if (uid != 0 && !debugonly && !tflag)
385 errx(EX_NOPERM, "must be root to alter routing table");
386 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
388 TAILQ_INIT(&fibl_head);
394 switch (keyword(*argv + 1)) {
413 error = fiboptlist_csv(*++argv, &fibl_head);
415 errx(EX_USAGE, "invalid fib number: %s", *argv);
421 if (TAILQ_EMPTY(&fibl_head)) {
422 error = fiboptlist_csv("default", &fibl_head);
424 errx(EX_OSERR, "fiboptlist_csv failed.");
426 TAILQ_FOREACH(fl, &fibl_head, fl_next)
427 flushroutes_fib(fl->fl_num);
431 flushroutes_fib(int fib)
433 struct rt_msghdr *rtm;
435 char *buf, *next, *lim;
436 int mib[7], rlen, seqno, count = 0;
439 error = set_sofib(fib);
441 warn("fib number %d is ignored", fib);
448 mib[2] = 0; /* protocol */
450 mib[4] = NET_RT_DUMP;
451 mib[5] = 0; /* no flags */
453 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
454 err(EX_OSERR, "route-sysctl-estimate");
455 if ((buf = malloc(needed)) == NULL)
456 errx(EX_OSERR, "malloc failed");
457 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) {
458 if (errno == ENOMEM && count++ < 10) {
459 warnx("Routing table grew, retrying");
464 err(EX_OSERR, "route-sysctl-get");
468 (void)printf("Examining routing table from sysctl\n");
470 for (next = buf; next < lim; next += rtm->rtm_msglen) {
471 rtm = (struct rt_msghdr *)(void *)next;
473 print_rtmsg(rtm, rtm->rtm_msglen);
474 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
477 struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
479 if (sa->sa_family != af)
484 rtm->rtm_type = RTM_DELETE;
485 rtm->rtm_seq = seqno;
486 rlen = write(s, next, rtm->rtm_msglen);
487 if (rlen < 0 && errno == EPERM)
488 err(1, "write to routing socket");
489 if (rlen < (int)rtm->rtm_msglen) {
490 warn("write to routing socket");
491 (void)printf("got only %d for rlen\n", rlen);
500 print_rtmsg(rtm, rlen);
502 struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
504 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
505 routename(sa) : netname(sa));
506 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
507 printf("%-20.20s ", routename(sa));
509 printf("-fib %-3d ", fib);
517 routename(struct sockaddr *sa)
519 struct sockaddr_dl *sdl;
523 if (!domain_initialized) {
524 domain_initialized = true;
525 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
526 (cp = strchr(domain, '.'))) {
527 domain[MAXHOSTNAMELEN] = '\0';
528 (void)strcpy(domain, cp + 1);
533 /* If the address is zero-filled, use "default". */
534 if (sa->sa_len == 0 && nflag == 0)
536 #if defined(INET) || defined(INET6)
537 switch (sa->sa_family) {
540 /* If the address is zero-filled, use "default". */
542 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr ==
549 /* If the address is zero-filled, use "default". */
551 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr))
558 switch (sa->sa_family) {
559 #if defined(INET) || defined(INET6)
567 struct sockaddr_storage ss;
571 memset(&ss, 0, sizeof(ss));
573 ss.ss_family = sa->sa_family;
575 memcpy(&ss, sa, sa->sa_len);
576 /* Expand sa->sa_len because it could be shortened. */
577 if (sa->sa_family == AF_INET)
578 ss.ss_len = sizeof(struct sockaddr_in);
579 else if (sa->sa_family == AF_INET6)
580 ss.ss_len = sizeof(struct sockaddr_in6);
581 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len,
582 rt_line, sizeof(rt_line), NULL, 0,
583 (nflag == 0) ? 0 : NI_NUMERICHOST);
585 warnx("getnameinfo(): %s", gai_strerror(error));
586 strncpy(rt_line, "invalid", sizeof(rt_line));
589 /* Remove the domain part if any. */
590 p = strchr(rt_line, '.');
591 if (p != NULL && strcmp(p + 1, domain) == 0)
599 sdl = (struct sockaddr_dl *)(void *)sa;
601 if (sdl->sdl_nlen == 0 &&
602 sdl->sdl_alen == 0 &&
603 sdl->sdl_slen == 0) {
604 n = snprintf(rt_line, sizeof(rt_line), "link#%d",
606 if (n > (int)sizeof(rt_line))
610 return (link_ntoa(sdl));
615 u_short *sp = (u_short *)(void *)sa;
616 u_short *splim = sp + ((sa->sa_len + 1) >> 1);
617 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family);
618 char *cpe = rt_line + sizeof(rt_line);
620 while (++sp < splim && cps < cpe) /* start with sa->sa_data */
621 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0)
632 * Return the name of the network whose address is given.
633 * The address is assumed to be that of a net, not a host.
636 netname(struct sockaddr *sa)
638 struct sockaddr_dl *sdl;
641 struct netent *np = NULL;
642 const char *cp = NULL;
646 switch (sa->sa_family) {
652 in = ((struct sockaddr_in *)(void *)sa)->sin_addr;
653 i = in.s_addr = ntohl(in.s_addr);
657 np = getnetbyaddr(i, AF_INET);
661 #define C(x) (unsigned)((x) & 0xff)
663 strncpy(net_line, cp, sizeof(net_line));
664 else if ((in.s_addr & 0xffffff) == 0)
665 (void)sprintf(net_line, "%u", C(in.s_addr >> 24));
666 else if ((in.s_addr & 0xffff) == 0)
667 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24),
669 else if ((in.s_addr & 0xff) == 0)
670 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24),
671 C(in.s_addr >> 16), C(in.s_addr >> 8));
673 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24),
674 C(in.s_addr >> 16), C(in.s_addr >> 8),
683 struct sockaddr_in6 sin6;
686 memset(&sin6, 0, sizeof(sin6));
687 memcpy(&sin6, sa, sa->sa_len);
688 sin6.sin6_len = sizeof(sin6);
689 sin6.sin6_family = AF_INET6;
691 niflags |= NI_NUMERICHOST;
692 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
693 net_line, sizeof(net_line), NULL, 0, niflags) != 0)
694 strncpy(net_line, "invalid", sizeof(net_line));
700 sdl = (struct sockaddr_dl *)(void *)sa;
702 if (sdl->sdl_nlen == 0 &&
703 sdl->sdl_alen == 0 &&
704 sdl->sdl_slen == 0) {
705 n = snprintf(net_line, sizeof(net_line), "link#%d",
707 if (n > (int)sizeof(net_line))
711 return (link_ntoa(sdl));
716 u_short *sp = (u_short *)(void *)sa->sa_data;
717 u_short *splim = sp + ((sa->sa_len + 1)>>1);
718 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family);
719 char *cpe = net_line + sizeof(net_line);
721 while (sp < splim && cps < cpe)
722 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0)
733 set_metric(char *value, int key)
737 u_long noval, *valp = &noval;
740 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
741 caseof(K_MTU, RTV_MTU, rmx_mtu);
742 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
743 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
744 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
745 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
746 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
747 caseof(K_RTT, RTV_RTT, rmx_rtt);
748 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
749 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight);
752 if (lockrest || locking)
753 rt_metrics.rmx_locks |= flag;
757 *valp = strtol(value, &endptr, 0);
758 if (errno == 0 && *endptr != '\0')
761 err(EX_USAGE, "%s", value);
762 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) {
765 clock_gettime(CLOCK_REALTIME_FAST, &ts);
770 #define F_ISHOST 0x01
771 #define F_FORCENET 0x02
772 #define F_FORCEHOST 0x04
774 #define F_INTERFACE 0x10
777 newroute(int argc, char **argv)
782 const char *dest, *gateway, *errmsg;
783 int key, error, flags, nrflags, fibnum;
785 if (uid != 0 && !debugonly && !tflag)
786 errx(EX_NOPERM, "must be root to alter routing table");
792 TAILQ_INIT(&fibl_head);
795 if (*cmd != 'g' && *cmd != 's')
796 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
798 if (**(++argv)== '-') {
799 switch (key = keyword(1 + *argv)) {
802 aflen = sizeof(struct sockaddr_dl);
808 aflen = sizeof(struct sockaddr_in);
815 aflen = sizeof(struct sockaddr_in6);
820 aflen = sizeof(struct sockaddr_storage);
824 nrflags |= F_INTERFACE;
827 flags &= ~RTF_STATIC;
836 nrflags |= F_FORCEHOST;
842 flags |= RTF_BLACKHOLE;
854 flags |= RTF_XRESOLVE;
863 flags &= ~RTF_STICKY;
868 error = fiboptlist_csv(*++argv, &fibl_head);
871 "invalid fib number: %s", *argv);
876 getaddr(RTAX_IFA, *++argv, 0, nrflags);
881 getaddr(RTAX_IFP, *++argv, 0, nrflags);
886 getaddr(RTAX_GENMASK, *++argv, 0, nrflags);
891 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags);
897 if (getaddr(RTAX_DST, *++argv, &hp, nrflags))
904 getaddr(RTAX_NETMASK, *++argv, 0, nrflags);
907 nrflags |= F_FORCENET;
912 if (prefixlen(*++argv) == -1) {
913 nrflags &= ~F_FORCENET;
916 nrflags |= F_FORCENET;
917 nrflags &= ~F_ISHOST;
931 set_metric(*++argv, key);
937 if ((rtm_addrs & RTA_DST) == 0) {
939 if (getaddr(RTAX_DST, *argv, &hp, nrflags))
941 } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
943 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags);
945 getaddr(RTAX_NETMASK, *argv, 0, nrflags);
946 nrflags |= F_FORCENET;
951 /* Do some sanity checks on resulting request */
952 if (so[RTAX_DST].ss_len == 0) {
953 warnx("destination parameter required");
957 if (so[RTAX_NETMASK].ss_len != 0 &&
958 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) {
959 warnx("destination and netmask family need to be the same");
963 if (nrflags & F_FORCEHOST) {
966 if (af == AF_INET6) {
967 rtm_addrs &= ~RTA_NETMASK;
968 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK]));
972 if (nrflags & F_FORCENET)
973 nrflags &= ~F_ISHOST;
975 if (nrflags & F_ISHOST)
977 if ((nrflags & F_INTERFACE) == 0)
978 flags |= RTF_GATEWAY;
979 if (nrflags & F_PROXY)
980 flags |= RTF_ANNOUNCE;
986 if (TAILQ_EMPTY(&fibl_head)) {
987 error = fiboptlist_csv("default", &fibl_head);
989 errx(EX_OSERR, "fiboptlist_csv failed.");
992 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
993 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags);
995 fl->fl_errno = errno;
996 error += fl->fl_error;
998 if (*cmd == 'g' || *cmd == 's')
1004 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1005 if (fl->fl_error == 0)
1011 printf("%s %s %s", cmd,
1012 (nrflags & F_ISHOST) ? "host" : "net", dest);
1014 printf(": gateway %s", gateway);
1017 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1018 if (fl->fl_error == 0
1019 && fl->fl_num >= 0) {
1024 printf("%d", fl->fl_num);
1034 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1035 if (fl->fl_error != 0) {
1036 printf("%s %s %s", cmd, (nrflags & F_ISHOST)
1037 ? "host" : "net", dest);
1039 printf(": gateway %s", gateway);
1041 if (fl->fl_num >= 0)
1042 printf(" fib %d", fl->fl_num);
1044 switch (fl->fl_errno) {
1046 errmsg = "not in table";
1049 errmsg = "entry in use";
1052 errmsg = "not enough memory";
1056 * handle recursion avoidance
1059 errmsg = "gateway uses the same route";
1062 errmsg = "route already in table";
1065 errmsg = strerror(fl->fl_errno);
1068 printf(": %s\n", errmsg);
1077 newroute_fib(int fib, char *cmd, int flags)
1081 error = set_sofib(fib);
1083 warn("fib number %d is ignored", fib);
1087 error = rtmsg(*cmd, flags, fib);
1093 inet_makenetandmask(u_long net, struct sockaddr_in *sin,
1094 struct sockaddr_in *sin_mask, u_long bits)
1098 rtm_addrs |= RTA_NETMASK;
1101 * MSB of net should be meaningful. 0/0 is exception.
1104 while ((net & 0xff000000) == 0)
1108 * If no /xx was specified we must calculate the
1111 if ((bits == 0) && (net != 0)) {
1114 for(i = 0, j = 0xff; i < 4; i++) {
1120 /* i holds the first non zero bit */
1124 mask = 0xffffffff << (32 - bits);
1126 sin->sin_addr.s_addr = htonl(net);
1127 sin_mask->sin_addr.s_addr = htonl(mask);
1128 sin_mask->sin_len = sizeof(struct sockaddr_in);
1129 sin_mask->sin_family = AF_INET;
1135 * XXX the function may need more improvement...
1138 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
1140 struct in6_addr in6;
1143 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
1144 sin6->sin6_scope_id == 0) {
1146 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
1147 /* aggregatable global unicast - RFC2374 */
1148 memset(&in6, 0, sizeof(in6));
1149 if (!memcmp(&sin6->sin6_addr.s6_addr[8],
1150 &in6.s6_addr[8], 8))
1155 if (plen == NULL || strcmp(plen, "128") == 0)
1157 rtm_addrs |= RTA_NETMASK;
1164 * Interpret an argument as a network address of some kind,
1165 * returning 1 if a host address, 0 if a network address.
1168 getaddr(int idx, char *str, struct hostent **hpp, int nrflags)
1170 struct sockaddr *sa;
1172 struct sockaddr_in *sin;
1177 #elif defined(INET6)
1181 if (idx < 0 || idx >= RTAX_MAX)
1182 usage("internal error");
1186 aflen = sizeof(struct sockaddr_in);
1187 #elif defined(INET6)
1189 aflen = sizeof(struct sockaddr_in6);
1192 aflen = sizeof(struct sockaddr_dl);
1198 rtm_addrs |= (1 << idx);
1199 sa = (struct sockaddr *)&so[idx];
1205 if (nrflags & F_INTERFACE) {
1206 struct ifaddrs *ifap, *ifa;
1207 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa;
1208 struct sockaddr_dl *sdl = NULL;
1210 if (getifaddrs(&ifap))
1211 err(EX_OSERR, "getifaddrs");
1213 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
1214 if (ifa->ifa_addr->sa_family != AF_LINK)
1217 if (strcmp(str, ifa->ifa_name) != 0)
1220 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr;
1222 /* If we found it, then use it */
1225 * Note that we need to copy before calling
1228 memcpy(sdl0, sdl, sdl->sdl_len);
1236 sa->sa_family = AF_LINK;
1239 if (strcmp(str, "default") == 0) {
1241 * Default is net 0.0.0.0/0
1245 nrflags |= F_FORCENET;
1246 getaddr(RTAX_NETMASK, str, 0, nrflags);
1251 switch (sa->sa_family) {
1255 struct addrinfo hints, *res;
1259 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL)
1261 memset(&hints, 0, sizeof(hints));
1262 hints.ai_family = sa->sa_family;
1263 hints.ai_socktype = SOCK_DGRAM;
1264 ecode = getaddrinfo(str, NULL, &hints, &res);
1265 if (ecode != 0 || res->ai_family != AF_INET6 ||
1266 res->ai_addrlen != sizeof(struct sockaddr_in6))
1267 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode));
1268 memcpy(sa, res->ai_addr, res->ai_addrlen);
1272 if (idx == RTAX_DST)
1273 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q));
1278 link_addr(str, (struct sockaddr_dl *)(void *)sa);
1282 sockaddr(str, sa, sizeof(struct sockaddr_storage));
1292 sin = (struct sockaddr_in *)(void *)sa;
1297 q = strchr(str,'/');
1298 if (q != NULL && idx == RTAX_DST) {
1300 if ((val = inet_network(str)) != INADDR_NONE) {
1301 inet_makenetandmask(val, sin,
1302 (struct sockaddr_in *)&so[RTAX_NETMASK],
1303 strtoul(q+1, 0, 0));
1308 if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) &&
1309 inet_aton(str, &sin->sin_addr)) {
1310 val = sin->sin_addr.s_addr;
1311 if (idx != RTAX_DST || nrflags & F_FORCEHOST ||
1312 inet_lnaof(sin->sin_addr) != INADDR_ANY)
1319 if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 &&
1320 ((val = inet_network(str)) != INADDR_NONE ||
1321 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) {
1323 inet_makenetandmask(val, sin,
1324 (struct sockaddr_in *)&so[RTAX_NETMASK], 0);
1327 hp = gethostbyname(str);
1330 sin->sin_family = hp->h_addrtype;
1331 memmove((char *)&sin->sin_addr, hp->h_addr,
1332 MIN((size_t)hp->h_length, sizeof(sin->sin_addr)));
1336 errx(EX_NOHOST, "bad address: %s", str);
1340 prefixlen(const char *str)
1342 int len = atoi(str), q, r;
1346 rtm_addrs |= RTA_NETMASK;
1351 struct sockaddr_in6 *sin6 =
1352 (struct sockaddr_in6 *)&so[RTAX_NETMASK];
1355 p = (char *)&sin6->sin6_addr;
1356 sin6->sin6_family = AF_INET6;
1357 sin6->sin6_len = sizeof(*sin6);
1364 struct sockaddr_in *sin =
1365 (struct sockaddr_in *)&so[RTAX_NETMASK];
1368 p = (char *)&sin->sin_addr;
1369 sin->sin_family = AF_INET;
1370 sin->sin_len = sizeof(*sin);
1375 errx(EX_OSERR, "prefixlen not supported in this af");
1378 if (len < 0 || max < len)
1379 errx(EX_USAGE, "%s: invalid prefixlen", str);
1383 memset((void *)p, 0, max / 8);
1385 memset((void *)p, 0xff, q);
1387 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1399 char *buf, *lim, *next, count = 0;
1400 struct rt_msghdr *rtm;
1405 mib[2] = 0; /* protocol */
1407 mib[4] = NET_RT_IFLIST;
1408 mib[5] = 0; /* no flags */
1409 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
1410 err(EX_OSERR, "route-sysctl-estimate");
1411 if ((buf = malloc(needed)) == NULL)
1412 errx(EX_OSERR, "malloc failed");
1413 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) {
1414 if (errno == ENOMEM && count++ < 10) {
1415 warnx("Routing table grew, retrying");
1420 err(EX_OSERR, "actual retrieval of interface table");
1423 for (next = buf; next < lim; next += rtm->rtm_msglen) {
1424 rtm = (struct rt_msghdr *)(void *)next;
1425 print_rtmsg(rtm, rtm->rtm_msglen);
1430 monitor(int argc, char *argv[])
1433 char msg[2048], *endptr;
1441 switch (keyword(*argv + 1)) {
1446 fib = strtol(*++argv, &endptr, 0);
1448 if (*endptr != '\0' ||
1450 (numfibs != -1 && fib > numfibs - 1))
1454 errx(EX_USAGE, "invalid fib number: %s", *argv);
1460 error = set_sofib(fib);
1462 errx(EX_USAGE, "invalid fib number: %d", fib);
1471 n = read(s, msg, 2048);
1473 (void)printf("\ngot message of size %d on %s", n, ctime(&now));
1474 print_rtmsg((struct rt_msghdr *)(void *)msg, n);
1479 rtmsg(int cmd, int flags, int fib)
1482 char *cp = m_rtmsg.m_space;
1485 #define NEXTADDR(w, u) \
1486 if (rtm_addrs & (w)) { \
1487 l = (((struct sockaddr *)&(u))->sa_len == 0) ? \
1489 1 + ((((struct sockaddr *)&(u))->sa_len - 1) \
1490 | (sizeof(long) - 1)); \
1491 memmove(cp, (char *)&(u), l); \
1494 sodump((struct sockaddr *)&(u), #w); \
1498 memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1501 else if (cmd == 'c')
1503 else if (cmd == 'g' || cmd == 's') {
1505 if (so[RTAX_IFP].ss_family == 0) {
1506 so[RTAX_IFP].ss_family = AF_LINK;
1507 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl);
1508 rtm_addrs |= RTA_IFP;
1512 #define rtm m_rtmsg.m_rtm
1514 rtm.rtm_flags = flags;
1515 rtm.rtm_version = RTM_VERSION;
1516 rtm.rtm_seq = ++rtm_seq;
1517 rtm.rtm_addrs = rtm_addrs;
1518 rtm.rtm_rmx = rt_metrics;
1519 rtm.rtm_inits = rtm_inits;
1521 NEXTADDR(RTA_DST, so[RTAX_DST]);
1522 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]);
1523 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]);
1524 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]);
1525 NEXTADDR(RTA_IFP, so[RTAX_IFP]);
1526 NEXTADDR(RTA_IFA, so[RTAX_IFA]);
1527 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1529 print_rtmsg(&rtm, l);
1532 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1535 err(1, "writing to routing socket");
1538 warnx("route has not been found");
1541 /* Handled by newroute() */
1544 warn("writing to routing socket");
1548 if (cmd == RTM_GET) {
1550 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1551 } while (l > 0 && (rtm.rtm_seq != rtm_seq || rtm.rtm_pid != pid));
1553 warn("read from routing socket");
1555 print_getmsg(&rtm, l, fib);
1561 static const char *const msgtypes[] = {
1563 "RTM_ADD: Add Route",
1564 "RTM_DELETE: Delete Route",
1565 "RTM_CHANGE: Change Metrics or flags",
1566 "RTM_GET: Report Metrics",
1567 "RTM_LOSING: Kernel Suspects Partitioning",
1568 "RTM_REDIRECT: Told to use different route",
1569 "RTM_MISS: Lookup failed on this address",
1570 "RTM_LOCK: fix specified metrics",
1571 "RTM_OLDADD: caused by SIOCADDRT",
1572 "RTM_OLDDEL: caused by SIOCDELRT",
1573 "RTM_RESOLVE: Route created by cloning",
1574 "RTM_NEWADDR: address being added to iface",
1575 "RTM_DELADDR: address being removed from iface",
1576 "RTM_IFINFO: iface status change",
1577 "RTM_NEWMADDR: new multicast group membership on iface",
1578 "RTM_DELMADDR: multicast group membership removed from iface",
1579 "RTM_IFANNOUNCE: interface arrival/departure",
1580 "RTM_IEEE80211: IEEE 802.11 wireless event",
1583 static const char metricnames[] =
1584 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire"
1586 static const char routeflags[] =
1587 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE"
1588 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE"
1589 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3"
1590 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY";
1591 static const char ifnetflags[] =
1592 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1593 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1594 "\017LINK2\020MULTICAST";
1595 static const char addrnames[] =
1596 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1598 static const char errfmt[] =
1599 "\n%s: truncated route message, only %zu bytes left\n";
1602 print_rtmsg(struct rt_msghdr *rtm, size_t msglen)
1604 struct if_msghdr *ifm;
1605 struct ifa_msghdr *ifam;
1607 struct ifma_msghdr *ifmam;
1609 struct if_announcemsghdr *ifan;
1614 if (rtm->rtm_version != RTM_VERSION) {
1615 (void)printf("routing message version %d not understood\n",
1619 if (rtm->rtm_type < nitems(msgtypes))
1620 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1622 (void)printf("unknown type %d: ", rtm->rtm_type);
1623 (void)printf("len %d, ", rtm->rtm_msglen);
1625 #define REQUIRE(x) do { \
1626 if (msglen < sizeof(x)) \
1629 msglen -= sizeof(x); \
1632 switch (rtm->rtm_type) {
1634 REQUIRE(struct if_msghdr);
1635 ifm = (struct if_msghdr *)rtm;
1636 (void)printf("if# %d, ", ifm->ifm_index);
1637 switch (ifm->ifm_data.ifi_link_state) {
1638 case LINK_STATE_DOWN:
1648 (void)printf("link: %s, flags:", state);
1649 printb(ifm->ifm_flags, ifnetflags);
1650 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen);
1654 REQUIRE(struct ifa_msghdr);
1655 ifam = (struct ifa_msghdr *)rtm;
1656 (void)printf("metric %d, flags:", ifam->ifam_metric);
1657 printb(ifam->ifam_flags, routeflags);
1658 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen);
1663 REQUIRE(struct ifma_msghdr);
1664 ifmam = (struct ifma_msghdr *)rtm;
1665 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen);
1668 case RTM_IFANNOUNCE:
1669 REQUIRE(struct if_announcemsghdr);
1670 ifan = (struct if_announcemsghdr *)rtm;
1671 (void)printf("if# %d, what: ", ifan->ifan_index);
1672 switch (ifan->ifan_what) {
1674 (void)printf("arrival");
1676 case IFAN_DEPARTURE:
1677 printf("departure");
1680 printf("#%d", ifan->ifan_what);
1688 printf("pid: %ld, seq %d, errno %d, flags:",
1689 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1690 printb(rtm->rtm_flags, routeflags);
1691 pmsg_common(rtm, msglen);
1697 (void)printf(errfmt, __func__, msglen);
1702 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib)
1704 struct sockaddr *sp[RTAX_MAX];
1709 memset(sp, 0, sizeof(sp));
1710 (void)printf(" route to: %s\n",
1711 routename((struct sockaddr *)&so[RTAX_DST]));
1712 if (rtm->rtm_version != RTM_VERSION) {
1713 warnx("routing message version %d not understood",
1717 if (rtm->rtm_msglen > msglen) {
1718 warnx("message length mismatch, in packet %d, returned %d",
1719 rtm->rtm_msglen, msglen);
1722 if (rtm->rtm_errno) {
1723 errno = rtm->rtm_errno;
1724 warn("message indicates error %d", errno);
1727 cp = ((char *)(rtm + 1));
1728 for (i = 0; i < RTAX_MAX; i++)
1729 if (rtm->rtm_addrs & (1 << i)) {
1730 sp[i] = (struct sockaddr *)cp;
1731 cp += SA_SIZE((struct sockaddr *)cp);
1733 if ((rtm->rtm_addrs & RTA_IFP) &&
1734 (sp[RTAX_IFP]->sa_family != AF_LINK ||
1735 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0))
1736 sp[RTAX_IFP] = NULL;
1738 (void)printf("destination: %s\n", routename(sp[RTAX_DST]));
1739 if (sp[RTAX_NETMASK])
1740 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK]));
1741 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY))
1742 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY]));
1744 (void)printf(" fib: %u\n", (unsigned int)fib);
1746 (void)printf(" interface: %.*s\n",
1747 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen,
1748 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data);
1749 (void)printf(" flags: ");
1750 printb(rtm->rtm_flags, routeflags);
1752 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1753 #define msec(u) (((u) + 500) / 1000) /* usec to msec */
1754 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe",
1755 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire");
1756 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1757 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1758 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1759 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1760 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1761 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT));
1762 if (rtm->rtm_rmx.rmx_expire > 0)
1763 clock_gettime(CLOCK_REALTIME_FAST, &ts);
1766 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec),
1770 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1772 pmsg_common(rtm, msglen);
1773 else if (rtm->rtm_addrs &~ RTA_IGN) {
1774 (void)printf("sockaddrs: ");
1775 printb(rtm->rtm_addrs, addrnames);
1782 pmsg_common(struct rt_msghdr *rtm, size_t msglen)
1785 (void)printf("\nlocks: ");
1786 printb(rtm->rtm_rmx.rmx_locks, metricnames);
1787 (void)printf(" inits: ");
1788 printb(rtm->rtm_inits, metricnames);
1789 if (msglen > sizeof(struct rt_msghdr))
1790 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs,
1791 msglen - sizeof(struct rt_msghdr));
1793 (void)fflush(stdout);
1797 pmsg_addrs(char *cp, int addrs, size_t len)
1799 struct sockaddr *sa;
1803 (void)putchar('\n');
1806 (void)printf("\nsockaddrs: ");
1807 printb(addrs, addrnames);
1809 for (i = 0; i < RTAX_MAX; i++)
1810 if (addrs & (1 << i)) {
1811 sa = (struct sockaddr *)cp;
1812 if (len == 0 || len < SA_SIZE(sa)) {
1813 (void)printf(errfmt, __func__, len);
1816 (void)printf(" %s", routename(sa));
1820 (void)putchar('\n');
1821 (void)fflush(stdout);
1825 printb(int b, const char *str)
1832 while ((i = *str++) != 0) {
1833 if (b & (1 << (i-1))) {
1840 for (; (i = *str) > 32; str++)
1851 keyword(const char *cp)
1853 const struct keytab *kt = keywords;
1855 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
1861 sodump(struct sockaddr *sa, const char *which)
1864 char nbuf[INET6_ADDRSTRLEN];
1867 switch (sa->sa_family) {
1869 (void)printf("%s: link %s; ", which,
1870 link_ntoa((struct sockaddr_dl *)(void *)sa));
1874 (void)printf("%s: inet %s; ", which,
1875 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr));
1880 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family,
1881 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf,
1886 (void)fflush(stdout);
1899 sockaddr(char *addr, struct sockaddr *sa, size_t size)
1901 char *cp = (char *)sa;
1902 char *cplim = cp + size;
1903 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1905 memset(cp, 0, size);
1908 if ((*addr >= '0') && (*addr <= '9')) {
1910 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1911 new = *addr - 'a' + 10;
1912 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1913 new = *addr - 'A' + 10;
1914 } else if (*addr == '\0')
1919 switch (state /* | INPUT */) {
1920 case GOTTWO | DIGIT:
1921 *cp++ = byte; /*FALLTHROUGH*/
1922 case VIRGIN | DIGIT:
1923 state = GOTONE; byte = new; continue;
1924 case GOTONE | DIGIT:
1925 state = GOTTWO; byte = new + (byte << 4); continue;
1926 default: /* | DELIM */
1927 state = VIRGIN; *cp++ = byte; byte = 0; continue;
1930 *cp++ = byte; /* FALLTHROUGH */
1935 } while (cp < cplim);
1936 sa->sa_len = cp - (char *)sa;