2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1989, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 static const char copyright[] =
34 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\
35 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95";
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
47 #include <sys/param.h>
49 #include <sys/socket.h>
50 #include <sys/ioctl.h>
51 #include <sys/sysctl.h>
52 #include <sys/types.h>
53 #include <sys/queue.h>
56 #include <net/route.h>
57 #include <net/if_dl.h>
58 #include <netinet/in.h>
59 #include <netinet/if_ether.h>
60 #include <arpa/inet.h>
78 TAILQ_ENTRY(fibl) fl_next;
85 static struct keytab {
88 } const keywords[] = {
93 static struct sockaddr_storage so[RTAX_MAX];
94 static int pid, rtm_addrs;
96 static int nflag, af, qflag, tflag;
97 static int verbose, aflen;
98 static int locking, lockrest, debugonly;
99 static struct rt_metrics rt_metrics;
100 static u_long rtm_inits;
102 static int defaultfib;
104 static char domain[MAXHOSTNAMELEN + 1];
105 static bool domain_initialized;
107 static char rt_line[NI_MAXHOST];
108 static char net_line[MAXHOSTNAMELEN + 1];
111 struct rt_msghdr m_rtm;
115 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head;
117 static void printb(int, const char *);
118 static void flushroutes(int argc, char *argv[]);
119 static int flushroutes_fib(int);
120 static int getaddr(int, char *, struct hostent **, int);
121 static int keyword(const char *);
123 static void inet_makenetandmask(u_long, struct sockaddr_in *,
124 struct sockaddr_in *, u_long);
127 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *);
129 static void interfaces(void);
130 static void monitor(int, char*[]);
131 static const char *netname(struct sockaddr *);
132 static void newroute(int, char **);
133 static int newroute_fib(int, char *, int);
134 static void pmsg_addrs(char *, int, size_t);
135 static void pmsg_common(struct rt_msghdr *, size_t);
136 static int prefixlen(const char *);
137 static void print_getmsg(struct rt_msghdr *, int, int);
138 static void print_rtmsg(struct rt_msghdr *, size_t);
139 static const char *routename(struct sockaddr *);
140 static int rtmsg(int, int, int);
141 static void set_metric(char *, int);
142 static int set_sofib(int);
143 static void sockaddr(char *, struct sockaddr *, size_t);
144 static void sodump(struct sockaddr *, const char *);
145 static int fiboptlist_csv(const char *, struct fibl_head_t *);
146 static int fiboptlist_range(const char *, struct fibl_head_t *);
148 static void usage(const char *) __dead2;
150 #define READ_TIMEOUT 10
151 static volatile sig_atomic_t stop_read;
154 stopit(int sig __unused)
161 usage(const char *cp)
164 warnx("bad keyword: %s", cp);
165 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]");
170 main(int argc, char **argv)
178 while ((ch = getopt(argc, argv, "46nqdtv")) != -1)
183 aflen = sizeof(struct sockaddr_in);
185 errx(1, "IPv4 support is not compiled in");
191 aflen = sizeof(struct sockaddr_in6);
193 errx(1, "IPv6 support is not compiled in");
221 s = open(_PATH_DEVNULL, O_WRONLY, 0);
223 s = socket(PF_ROUTE, SOCK_RAW, 0);
225 err(EX_OSERR, "socket");
227 len = sizeof(numfibs);
228 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1)
231 len = sizeof(defaultfib);
233 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL,
238 switch (keyword(*argv)) {
248 newroute(argc, argv);
256 flushroutes(argc, argv);
270 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib,
275 fiboptlist_range(const char *arg, struct fibl_head_t *flh)
278 char *str0, *str, *token, *endptr;
279 int fib[2], i, error;
281 str0 = str = strdup(arg);
284 while ((token = strsep(&str, "-")) != NULL) {
289 fib[i] = strtol(token, &endptr, 0);
291 if (*endptr != '\0' ||
293 (numfibs != -1 && fib[i] > numfibs - 1))
303 goto fiboptlist_range_ret;
306 if (fib[0] >= fib[1]) {
308 goto fiboptlist_range_ret;
310 for (i = fib[0]; i <= fib[1]; i++) {
311 fl = calloc(1, sizeof(*fl));
314 goto fiboptlist_range_ret;
317 TAILQ_INSERT_TAIL(flh, fl, fl_next);
319 fiboptlist_range_ret:
326 fiboptlist_csv(const char *arg, struct fibl_head_t *flh)
329 char *str0, *str, *token, *endptr;
333 if (strcmp("all", arg) == 0) {
334 str = calloc(1, ALLSTRLEN);
337 goto fiboptlist_csv_ret;
340 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1);
342 snprintf(str, ALLSTRLEN - 1, "%d", 0);
343 } else if (strcmp("default", arg) == 0) {
344 str0 = str = calloc(1, ALLSTRLEN);
347 goto fiboptlist_csv_ret;
349 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib);
351 str0 = str = strdup(arg);
354 while ((token = strsep(&str, ",")) != NULL) {
355 if (*token != '-' && strchr(token, '-') != NULL) {
356 error = fiboptlist_range(token, flh);
358 goto fiboptlist_csv_ret;
361 fib = strtol(token, &endptr, 0);
363 if (*endptr != '\0' ||
365 (numfibs != -1 && fib > numfibs - 1))
370 goto fiboptlist_csv_ret;
372 fl = calloc(1, sizeof(*fl));
375 goto fiboptlist_csv_ret;
378 TAILQ_INSERT_TAIL(flh, fl, fl_next);
388 * Purge all entries in the routing tables not
389 * associated with network interfaces.
392 flushroutes(int argc, char *argv[])
397 if (uid != 0 && !debugonly && !tflag)
398 errx(EX_NOPERM, "must be root to alter routing table");
399 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
401 TAILQ_INIT(&fibl_head);
407 switch (keyword(*argv + 1)) {
426 error = fiboptlist_csv(*++argv, &fibl_head);
428 errx(EX_USAGE, "invalid fib number: %s", *argv);
434 if (TAILQ_EMPTY(&fibl_head)) {
435 error = fiboptlist_csv("default", &fibl_head);
437 errx(EX_OSERR, "fiboptlist_csv failed.");
439 TAILQ_FOREACH(fl, &fibl_head, fl_next)
440 flushroutes_fib(fl->fl_num);
444 flushroutes_fib(int fib)
446 struct rt_msghdr *rtm;
448 char *buf, *next, *lim;
449 int mib[7], rlen, seqno, count = 0;
452 error = set_sofib(fib);
454 warn("fib number %d is ignored", fib);
461 mib[2] = 0; /* protocol */
463 mib[4] = NET_RT_DUMP;
464 mib[5] = 0; /* no flags */
466 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
467 err(EX_OSERR, "route-sysctl-estimate");
468 if ((buf = malloc(needed)) == NULL)
469 errx(EX_OSERR, "malloc failed");
470 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) {
471 if (errno == ENOMEM && count++ < 10) {
472 warnx("Routing table grew, retrying");
477 err(EX_OSERR, "route-sysctl-get");
481 (void)printf("Examining routing table from sysctl\n");
483 for (next = buf; next < lim; next += rtm->rtm_msglen) {
484 rtm = (struct rt_msghdr *)(void *)next;
486 print_rtmsg(rtm, rtm->rtm_msglen);
487 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
490 struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
492 if (sa->sa_family != af)
497 rtm->rtm_type = RTM_DELETE;
498 rtm->rtm_seq = seqno;
499 rlen = write(s, next, rtm->rtm_msglen);
500 if (rlen < 0 && errno == EPERM)
501 err(1, "write to routing socket");
502 if (rlen < (int)rtm->rtm_msglen) {
503 warn("write to routing socket");
504 (void)printf("got only %d for rlen\n", rlen);
513 print_rtmsg(rtm, rlen);
515 struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
517 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
518 routename(sa) : netname(sa));
519 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
520 printf("%-20.20s ", routename(sa));
522 printf("-fib %-3d ", fib);
531 routename(struct sockaddr *sa)
533 struct sockaddr_dl *sdl;
537 if (!domain_initialized) {
538 domain_initialized = true;
539 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
540 (cp = strchr(domain, '.'))) {
541 domain[MAXHOSTNAMELEN] = '\0';
542 (void)strcpy(domain, cp + 1);
547 /* If the address is zero-filled, use "default". */
548 if (sa->sa_len == 0 && nflag == 0)
550 #if defined(INET) || defined(INET6)
551 switch (sa->sa_family) {
554 /* If the address is zero-filled, use "default". */
556 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr ==
563 /* If the address is zero-filled, use "default". */
565 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr))
572 switch (sa->sa_family) {
573 #if defined(INET) || defined(INET6)
581 struct sockaddr_storage ss;
585 memset(&ss, 0, sizeof(ss));
587 ss.ss_family = sa->sa_family;
589 memcpy(&ss, sa, sa->sa_len);
590 /* Expand sa->sa_len because it could be shortened. */
591 if (sa->sa_family == AF_INET)
592 ss.ss_len = sizeof(struct sockaddr_in);
593 else if (sa->sa_family == AF_INET6)
594 ss.ss_len = sizeof(struct sockaddr_in6);
595 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len,
596 rt_line, sizeof(rt_line), NULL, 0,
597 (nflag == 0) ? 0 : NI_NUMERICHOST);
599 warnx("getnameinfo(): %s", gai_strerror(error));
600 strncpy(rt_line, "invalid", sizeof(rt_line));
603 /* Remove the domain part if any. */
604 p = strchr(rt_line, '.');
605 if (p != NULL && strcmp(p + 1, domain) == 0)
613 sdl = (struct sockaddr_dl *)(void *)sa;
615 if (sdl->sdl_nlen == 0 &&
616 sdl->sdl_alen == 0 &&
617 sdl->sdl_slen == 0) {
618 n = snprintf(rt_line, sizeof(rt_line), "link#%d",
620 if (n > (int)sizeof(rt_line))
624 return (link_ntoa(sdl));
629 u_short *sp = (u_short *)(void *)sa;
630 u_short *splim = sp + ((sa->sa_len + 1) >> 1);
631 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family);
632 char *cpe = rt_line + sizeof(rt_line);
634 while (++sp < splim && cps < cpe) /* start with sa->sa_data */
635 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0)
646 * Return the name of the network whose address is given.
647 * The address is assumed to be that of a net, not a host.
650 netname(struct sockaddr *sa)
652 struct sockaddr_dl *sdl;
655 struct netent *np = NULL;
656 const char *cp = NULL;
660 switch (sa->sa_family) {
666 in = ((struct sockaddr_in *)(void *)sa)->sin_addr;
667 i = in.s_addr = ntohl(in.s_addr);
671 np = getnetbyaddr(i, AF_INET);
675 #define C(x) (unsigned)((x) & 0xff)
677 strncpy(net_line, cp, sizeof(net_line));
678 else if ((in.s_addr & 0xffffff) == 0)
679 (void)sprintf(net_line, "%u", C(in.s_addr >> 24));
680 else if ((in.s_addr & 0xffff) == 0)
681 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24),
683 else if ((in.s_addr & 0xff) == 0)
684 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24),
685 C(in.s_addr >> 16), C(in.s_addr >> 8));
687 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24),
688 C(in.s_addr >> 16), C(in.s_addr >> 8),
697 struct sockaddr_in6 sin6;
700 memset(&sin6, 0, sizeof(sin6));
701 memcpy(&sin6, sa, sa->sa_len);
702 sin6.sin6_len = sizeof(sin6);
703 sin6.sin6_family = AF_INET6;
705 niflags |= NI_NUMERICHOST;
706 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
707 net_line, sizeof(net_line), NULL, 0, niflags) != 0)
708 strncpy(net_line, "invalid", sizeof(net_line));
714 sdl = (struct sockaddr_dl *)(void *)sa;
716 if (sdl->sdl_nlen == 0 &&
717 sdl->sdl_alen == 0 &&
718 sdl->sdl_slen == 0) {
719 n = snprintf(net_line, sizeof(net_line), "link#%d",
721 if (n > (int)sizeof(net_line))
725 return (link_ntoa(sdl));
730 u_short *sp = (u_short *)(void *)sa->sa_data;
731 u_short *splim = sp + ((sa->sa_len + 1)>>1);
732 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family);
733 char *cpe = net_line + sizeof(net_line);
735 while (sp < splim && cps < cpe)
736 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0)
747 set_metric(char *value, int key)
751 u_long noval, *valp = &noval;
754 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
755 caseof(K_MTU, RTV_MTU, rmx_mtu);
756 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
757 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
758 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
759 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
760 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
761 caseof(K_RTT, RTV_RTT, rmx_rtt);
762 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
763 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight);
766 if (lockrest || locking)
767 rt_metrics.rmx_locks |= flag;
771 *valp = strtol(value, &endptr, 0);
772 if (errno == 0 && *endptr != '\0')
775 err(EX_USAGE, "%s", value);
776 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) {
779 clock_gettime(CLOCK_REALTIME_FAST, &ts);
784 #define F_ISHOST 0x01
785 #define F_FORCENET 0x02
786 #define F_FORCEHOST 0x04
788 #define F_INTERFACE 0x10
791 newroute(int argc, char **argv)
797 const char *dest, *gateway, *errmsg;
798 int key, error, flags, nrflags, fibnum;
800 if (uid != 0 && !debugonly && !tflag)
801 errx(EX_NOPERM, "must be root to alter routing table");
807 TAILQ_INIT(&fibl_head);
809 sigemptyset(&sa.sa_mask);
811 sa.sa_handler = stopit;
812 if (sigaction(SIGALRM, &sa, 0) == -1)
813 warn("sigaction SIGALRM");
816 if (*cmd != 'g' && *cmd != 's')
817 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
819 if (**(++argv)== '-') {
820 switch (key = keyword(1 + *argv)) {
823 aflen = sizeof(struct sockaddr_dl);
829 aflen = sizeof(struct sockaddr_in);
836 aflen = sizeof(struct sockaddr_in6);
841 aflen = sizeof(struct sockaddr_storage);
845 nrflags |= F_INTERFACE;
848 flags &= ~RTF_STATIC;
857 nrflags |= F_FORCEHOST;
863 flags |= RTF_BLACKHOLE;
875 flags |= RTF_XRESOLVE;
884 flags &= ~RTF_STICKY;
889 error = fiboptlist_csv(*++argv, &fibl_head);
892 "invalid fib number: %s", *argv);
897 getaddr(RTAX_IFA, *++argv, 0, nrflags);
902 getaddr(RTAX_IFP, *++argv, 0, nrflags);
907 getaddr(RTAX_GENMASK, *++argv, 0, nrflags);
912 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags);
918 if (getaddr(RTAX_DST, *++argv, &hp, nrflags))
925 getaddr(RTAX_NETMASK, *++argv, 0, nrflags);
928 nrflags |= F_FORCENET;
933 if (prefixlen(*++argv) == -1) {
934 nrflags &= ~F_FORCENET;
937 nrflags |= F_FORCENET;
938 nrflags &= ~F_ISHOST;
952 set_metric(*++argv, key);
958 if ((rtm_addrs & RTA_DST) == 0) {
960 if (getaddr(RTAX_DST, *argv, &hp, nrflags))
962 } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
964 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags);
966 getaddr(RTAX_NETMASK, *argv, 0, nrflags);
967 nrflags |= F_FORCENET;
972 /* Do some sanity checks on resulting request */
973 if (so[RTAX_DST].ss_len == 0) {
974 warnx("destination parameter required");
978 if (so[RTAX_NETMASK].ss_len != 0 &&
979 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) {
980 warnx("destination and netmask family need to be the same");
984 if (nrflags & F_FORCEHOST) {
987 if (af == AF_INET6) {
988 rtm_addrs &= ~RTA_NETMASK;
989 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK]));
993 if (nrflags & F_FORCENET)
994 nrflags &= ~F_ISHOST;
996 if (nrflags & F_ISHOST)
998 if ((nrflags & F_INTERFACE) == 0)
999 flags |= RTF_GATEWAY;
1000 if (nrflags & F_PROXY)
1001 flags |= RTF_ANNOUNCE;
1004 if (gateway == NULL)
1007 if (TAILQ_EMPTY(&fibl_head)) {
1008 error = fiboptlist_csv("default", &fibl_head);
1010 errx(EX_OSERR, "fiboptlist_csv failed.");
1013 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1014 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags);
1016 fl->fl_errno = errno;
1017 error += fl->fl_error;
1019 if (*cmd == 'g' || *cmd == 's')
1025 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1026 if (fl->fl_error == 0)
1032 printf("%s %s %s", cmd,
1033 (nrflags & F_ISHOST) ? "host" : "net", dest);
1035 printf(": gateway %s", gateway);
1038 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1039 if (fl->fl_error == 0
1040 && fl->fl_num >= 0) {
1045 printf("%d", fl->fl_num);
1056 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1057 if (fl->fl_error != 0) {
1060 printf("%s %s %s", cmd, (nrflags & F_ISHOST)
1061 ? "host" : "net", dest);
1063 printf(": gateway %s", gateway);
1065 if (fl->fl_num >= 0)
1066 printf(" fib %d", fl->fl_num);
1068 switch (fl->fl_errno) {
1070 errmsg = "not in table";
1073 errmsg = "entry in use";
1076 errmsg = "not enough memory";
1080 * handle recursion avoidance
1083 errmsg = "gateway uses the same route";
1086 errmsg = "route already in table";
1089 errmsg = strerror(fl->fl_errno);
1092 printf(": %s\n", errmsg);
1100 newroute_fib(int fib, char *cmd, int flags)
1104 error = set_sofib(fib);
1106 warn("fib number %d is ignored", fib);
1110 error = rtmsg(*cmd, flags, fib);
1116 inet_makenetandmask(u_long net, struct sockaddr_in *sin,
1117 struct sockaddr_in *sin_mask, u_long bits)
1121 rtm_addrs |= RTA_NETMASK;
1124 * MSB of net should be meaningful. 0/0 is exception.
1127 while ((net & 0xff000000) == 0)
1131 * If no /xx was specified we must calculate the
1134 if ((bits == 0) && (net != 0)) {
1137 for(i = 0, j = 0xff; i < 4; i++) {
1143 /* i holds the first non zero bit */
1147 mask = 0xffffffff << (32 - bits);
1149 sin->sin_addr.s_addr = htonl(net);
1150 sin_mask->sin_addr.s_addr = htonl(mask);
1151 sin_mask->sin_len = sizeof(struct sockaddr_in);
1152 sin_mask->sin_family = AF_INET;
1158 * XXX the function may need more improvement...
1161 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
1165 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
1166 sin6->sin6_scope_id == 0)
1170 if (plen == NULL || strcmp(plen, "128") == 0)
1172 rtm_addrs |= RTA_NETMASK;
1179 * Interpret an argument as a network address of some kind,
1180 * returning 1 if a host address, 0 if a network address.
1183 getaddr(int idx, char *str, struct hostent **hpp, int nrflags)
1185 struct sockaddr *sa;
1187 struct sockaddr_in *sin;
1192 #elif defined(INET6)
1196 if (idx < 0 || idx >= RTAX_MAX)
1197 usage("internal error");
1201 aflen = sizeof(struct sockaddr_in);
1202 #elif defined(INET6)
1204 aflen = sizeof(struct sockaddr_in6);
1207 aflen = sizeof(struct sockaddr_dl);
1213 rtm_addrs |= (1 << idx);
1214 sa = (struct sockaddr *)&so[idx];
1220 if (nrflags & F_INTERFACE) {
1221 struct ifaddrs *ifap, *ifa;
1222 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa;
1223 struct sockaddr_dl *sdl = NULL;
1225 if (getifaddrs(&ifap))
1226 err(EX_OSERR, "getifaddrs");
1228 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
1229 if (ifa->ifa_addr->sa_family != AF_LINK)
1232 if (strcmp(str, ifa->ifa_name) != 0)
1235 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr;
1237 /* If we found it, then use it */
1240 * Note that we need to copy before calling
1243 memcpy(sdl0, sdl, sdl->sdl_len);
1250 "interface '%s' does not exist", str);
1254 sa->sa_family = AF_LINK;
1257 if (strcmp(str, "default") == 0) {
1259 * Default is net 0.0.0.0/0
1263 nrflags |= F_FORCENET;
1264 getaddr(RTAX_NETMASK, str, 0, nrflags);
1269 switch (sa->sa_family) {
1273 struct addrinfo hints, *res;
1277 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL)
1279 memset(&hints, 0, sizeof(hints));
1280 hints.ai_family = sa->sa_family;
1281 hints.ai_socktype = SOCK_DGRAM;
1282 ecode = getaddrinfo(str, NULL, &hints, &res);
1283 if (ecode != 0 || res->ai_family != AF_INET6 ||
1284 res->ai_addrlen != sizeof(struct sockaddr_in6))
1285 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode));
1286 memcpy(sa, res->ai_addr, res->ai_addrlen);
1290 if (idx == RTAX_DST)
1291 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q));
1296 link_addr(str, (struct sockaddr_dl *)(void *)sa);
1300 sockaddr(str, sa, sizeof(struct sockaddr_storage));
1310 sin = (struct sockaddr_in *)(void *)sa;
1315 q = strchr(str,'/');
1316 if (q != NULL && idx == RTAX_DST) {
1318 if ((val = inet_network(str)) != INADDR_NONE) {
1319 inet_makenetandmask(val, sin,
1320 (struct sockaddr_in *)&so[RTAX_NETMASK],
1321 strtoul(q+1, 0, 0));
1326 if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) &&
1327 inet_aton(str, &sin->sin_addr)) {
1328 val = sin->sin_addr.s_addr;
1329 if (idx != RTAX_DST || nrflags & F_FORCEHOST ||
1330 inet_lnaof(sin->sin_addr) != INADDR_ANY)
1337 if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 &&
1338 ((val = inet_network(str)) != INADDR_NONE ||
1339 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) {
1341 inet_makenetandmask(val, sin,
1342 (struct sockaddr_in *)&so[RTAX_NETMASK], 0);
1345 hp = gethostbyname(str);
1348 sin->sin_family = hp->h_addrtype;
1349 memmove((char *)&sin->sin_addr, hp->h_addr,
1350 MIN((size_t)hp->h_length, sizeof(sin->sin_addr)));
1354 errx(EX_NOHOST, "bad address: %s", str);
1358 prefixlen(const char *str)
1360 int len = atoi(str), q, r;
1364 rtm_addrs |= RTA_NETMASK;
1369 struct sockaddr_in6 *sin6 =
1370 (struct sockaddr_in6 *)&so[RTAX_NETMASK];
1373 p = (char *)&sin6->sin6_addr;
1374 sin6->sin6_family = AF_INET6;
1375 sin6->sin6_len = sizeof(*sin6);
1382 struct sockaddr_in *sin =
1383 (struct sockaddr_in *)&so[RTAX_NETMASK];
1386 p = (char *)&sin->sin_addr;
1387 sin->sin_family = AF_INET;
1388 sin->sin_len = sizeof(*sin);
1393 errx(EX_OSERR, "prefixlen not supported in this af");
1396 if (len < 0 || max < len)
1397 errx(EX_USAGE, "%s: invalid prefixlen", str);
1401 memset((void *)p, 0, max / 8);
1403 memset((void *)p, 0xff, q);
1405 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1417 char *buf, *lim, *next, count = 0;
1418 struct rt_msghdr *rtm;
1423 mib[2] = 0; /* protocol */
1425 mib[4] = NET_RT_IFLIST;
1426 mib[5] = 0; /* no flags */
1427 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
1428 err(EX_OSERR, "route-sysctl-estimate");
1429 if ((buf = malloc(needed)) == NULL)
1430 errx(EX_OSERR, "malloc failed");
1431 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) {
1432 if (errno == ENOMEM && count++ < 10) {
1433 warnx("Routing table grew, retrying");
1438 err(EX_OSERR, "actual retrieval of interface table");
1441 for (next = buf; next < lim; next += rtm->rtm_msglen) {
1442 rtm = (struct rt_msghdr *)(void *)next;
1443 print_rtmsg(rtm, rtm->rtm_msglen);
1449 monitor(int argc, char *argv[])
1452 char msg[2048], *endptr;
1460 switch (keyword(*argv + 1)) {
1465 fib = strtol(*++argv, &endptr, 0);
1467 if (*endptr != '\0' ||
1469 (numfibs != -1 && fib > numfibs - 1))
1473 errx(EX_USAGE, "invalid fib number: %s", *argv);
1479 error = set_sofib(fib);
1481 errx(EX_USAGE, "invalid fib number: %d", fib);
1490 n = read(s, msg, 2048);
1492 (void)printf("\ngot message of size %d on %s", n, ctime(&now));
1493 print_rtmsg((struct rt_msghdr *)(void *)msg, n);
1498 rtmsg(int cmd, int flags, int fib)
1501 char *cp = m_rtmsg.m_space;
1504 #define NEXTADDR(w, u) \
1505 if (rtm_addrs & (w)) { \
1506 l = SA_SIZE(&(u)); \
1507 memmove(cp, (char *)&(u), l); \
1510 sodump((struct sockaddr *)&(u), #w); \
1514 memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1517 else if (cmd == 'c')
1519 else if (cmd == 'g' || cmd == 's') {
1521 if (so[RTAX_IFP].ss_family == 0) {
1522 so[RTAX_IFP].ss_family = AF_LINK;
1523 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl);
1524 rtm_addrs |= RTA_IFP;
1528 flags |= RTF_PINNED;
1530 #define rtm m_rtmsg.m_rtm
1532 rtm.rtm_flags = flags;
1533 rtm.rtm_version = RTM_VERSION;
1534 rtm.rtm_seq = ++rtm_seq;
1535 rtm.rtm_addrs = rtm_addrs;
1536 rtm.rtm_rmx = rt_metrics;
1537 rtm.rtm_inits = rtm_inits;
1539 NEXTADDR(RTA_DST, so[RTAX_DST]);
1540 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]);
1541 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]);
1542 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]);
1543 NEXTADDR(RTA_IFP, so[RTAX_IFP]);
1544 NEXTADDR(RTA_IFA, so[RTAX_IFA]);
1545 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1547 print_rtmsg(&rtm, l);
1550 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1553 err(1, "writing to routing socket");
1556 warnx("route has not been found");
1559 /* Handled by newroute() */
1562 warn("writing to routing socket");
1566 if (cmd == RTM_GET) {
1568 alarm(READ_TIMEOUT);
1570 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1571 } while (l > 0 && stop_read == 0 &&
1572 (rtm.rtm_type != RTM_GET || rtm.rtm_seq != rtm_seq ||
1573 rtm.rtm_pid != pid));
1574 if (stop_read != 0) {
1575 warnx("read from routing socket timed out");
1580 warn("read from routing socket");
1582 print_getmsg(&rtm, l, fib);
1588 static const char *const msgtypes[] = {
1590 "RTM_ADD: Add Route",
1591 "RTM_DELETE: Delete Route",
1592 "RTM_CHANGE: Change Metrics or flags",
1593 "RTM_GET: Report Metrics",
1594 "RTM_LOSING: Kernel Suspects Partitioning",
1595 "RTM_REDIRECT: Told to use different route",
1596 "RTM_MISS: Lookup failed on this address",
1597 "RTM_LOCK: fix specified metrics",
1598 "RTM_OLDADD: caused by SIOCADDRT",
1599 "RTM_OLDDEL: caused by SIOCDELRT",
1600 "RTM_RESOLVE: Route created by cloning",
1601 "RTM_NEWADDR: address being added to iface",
1602 "RTM_DELADDR: address being removed from iface",
1603 "RTM_IFINFO: iface status change",
1604 "RTM_NEWMADDR: new multicast group membership on iface",
1605 "RTM_DELMADDR: multicast group membership removed from iface",
1606 "RTM_IFANNOUNCE: interface arrival/departure",
1607 "RTM_IEEE80211: IEEE 802.11 wireless event",
1610 static const char metricnames[] =
1611 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire"
1613 static const char routeflags[] =
1614 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE"
1615 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE"
1616 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3"
1617 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY";
1618 static const char ifnetflags[] =
1619 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1620 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1621 "\017LINK2\020MULTICAST";
1622 static const char addrnames[] =
1623 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1625 static const char errfmt[] =
1626 "\n%s: truncated route message, only %zu bytes left\n";
1629 print_rtmsg(struct rt_msghdr *rtm, size_t msglen)
1631 struct if_msghdr *ifm;
1632 struct ifa_msghdr *ifam;
1634 struct ifma_msghdr *ifmam;
1636 struct if_announcemsghdr *ifan;
1641 if (rtm->rtm_version != RTM_VERSION) {
1642 (void)printf("routing message version %d not understood\n",
1646 if (rtm->rtm_type < nitems(msgtypes))
1647 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1649 (void)printf("unknown type %d: ", rtm->rtm_type);
1650 (void)printf("len %d, ", rtm->rtm_msglen);
1652 #define REQUIRE(x) do { \
1653 if (msglen < sizeof(x)) \
1656 msglen -= sizeof(x); \
1659 switch (rtm->rtm_type) {
1661 REQUIRE(struct if_msghdr);
1662 ifm = (struct if_msghdr *)rtm;
1663 (void)printf("if# %d, ", ifm->ifm_index);
1664 switch (ifm->ifm_data.ifi_link_state) {
1665 case LINK_STATE_DOWN:
1675 (void)printf("link: %s, flags:", state);
1676 printb(ifm->ifm_flags, ifnetflags);
1677 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen);
1681 REQUIRE(struct ifa_msghdr);
1682 ifam = (struct ifa_msghdr *)rtm;
1683 (void)printf("metric %d, flags:", ifam->ifam_metric);
1684 printb(ifam->ifam_flags, routeflags);
1685 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen);
1690 REQUIRE(struct ifma_msghdr);
1691 ifmam = (struct ifma_msghdr *)rtm;
1692 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen);
1695 case RTM_IFANNOUNCE:
1696 REQUIRE(struct if_announcemsghdr);
1697 ifan = (struct if_announcemsghdr *)rtm;
1698 (void)printf("if# %d, what: ", ifan->ifan_index);
1699 switch (ifan->ifan_what) {
1701 (void)printf("arrival");
1703 case IFAN_DEPARTURE:
1704 printf("departure");
1707 printf("#%d", ifan->ifan_what);
1715 if (rtm->rtm_type <= RTM_RESOLVE) {
1716 printf("pid: %ld, seq %d, errno %d, flags:",
1717 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1718 printb(rtm->rtm_flags, routeflags);
1719 pmsg_common(rtm, msglen);
1721 printf("type: %u, len: %zu\n", rtm->rtm_type, msglen);
1727 (void)printf(errfmt, __func__, msglen);
1732 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib)
1734 struct sockaddr *sp[RTAX_MAX];
1739 memset(sp, 0, sizeof(sp));
1740 (void)printf(" route to: %s\n",
1741 routename((struct sockaddr *)&so[RTAX_DST]));
1742 if (rtm->rtm_version != RTM_VERSION) {
1743 warnx("routing message version %d not understood",
1747 if (rtm->rtm_msglen > msglen) {
1748 warnx("message length mismatch, in packet %d, returned %d",
1749 rtm->rtm_msglen, msglen);
1752 if (rtm->rtm_errno) {
1753 errno = rtm->rtm_errno;
1754 warn("message indicates error %d", errno);
1757 cp = ((char *)(rtm + 1));
1758 for (i = 0; i < RTAX_MAX; i++)
1759 if (rtm->rtm_addrs & (1 << i)) {
1760 sp[i] = (struct sockaddr *)cp;
1761 cp += SA_SIZE((struct sockaddr *)cp);
1763 if ((rtm->rtm_addrs & RTA_IFP) &&
1764 (sp[RTAX_IFP]->sa_family != AF_LINK ||
1765 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0))
1766 sp[RTAX_IFP] = NULL;
1768 (void)printf("destination: %s\n", routename(sp[RTAX_DST]));
1769 if (sp[RTAX_NETMASK])
1770 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK]));
1771 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY))
1772 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY]));
1774 (void)printf(" fib: %u\n", (unsigned int)fib);
1776 (void)printf(" interface: %.*s\n",
1777 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen,
1778 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data);
1779 (void)printf(" flags: ");
1780 printb(rtm->rtm_flags, routeflags);
1782 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1783 #define msec(u) (((u) + 500) / 1000) /* usec to msec */
1784 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe",
1785 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire");
1786 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1787 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1788 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1789 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1790 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1791 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT));
1792 if (rtm->rtm_rmx.rmx_expire > 0)
1793 clock_gettime(CLOCK_REALTIME_FAST, &ts);
1796 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec),
1800 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1802 pmsg_common(rtm, msglen);
1803 else if (rtm->rtm_addrs &~ RTA_IGN) {
1804 (void)printf("sockaddrs: ");
1805 printb(rtm->rtm_addrs, addrnames);
1812 pmsg_common(struct rt_msghdr *rtm, size_t msglen)
1815 (void)printf("\nlocks: ");
1816 printb(rtm->rtm_rmx.rmx_locks, metricnames);
1817 (void)printf(" inits: ");
1818 printb(rtm->rtm_inits, metricnames);
1819 if (msglen > sizeof(struct rt_msghdr))
1820 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs,
1821 msglen - sizeof(struct rt_msghdr));
1823 (void)fflush(stdout);
1827 pmsg_addrs(char *cp, int addrs, size_t len)
1829 struct sockaddr *sa;
1833 (void)putchar('\n');
1836 (void)printf("\nsockaddrs: ");
1837 printb(addrs, addrnames);
1839 for (i = 0; i < RTAX_MAX; i++)
1840 if (addrs & (1 << i)) {
1841 sa = (struct sockaddr *)cp;
1842 if (len == 0 || len < SA_SIZE(sa)) {
1843 (void)printf(errfmt, __func__, len);
1846 (void)printf(" %s", routename(sa));
1850 (void)putchar('\n');
1851 (void)fflush(stdout);
1855 printb(int b, const char *str)
1862 while ((i = *str++) != 0) {
1863 if (b & (1 << (i-1))) {
1870 for (; (i = *str) > 32; str++)
1881 keyword(const char *cp)
1883 const struct keytab *kt = keywords;
1885 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
1891 sodump(struct sockaddr *sa, const char *which)
1894 char nbuf[INET6_ADDRSTRLEN];
1897 switch (sa->sa_family) {
1899 (void)printf("%s: link %s; ", which,
1900 link_ntoa((struct sockaddr_dl *)(void *)sa));
1904 (void)printf("%s: inet %s; ", which,
1905 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr));
1910 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family,
1911 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf,
1916 (void)fflush(stdout);
1929 sockaddr(char *addr, struct sockaddr *sa, size_t size)
1931 char *cp = (char *)sa;
1932 char *cplim = cp + size;
1933 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1935 memset(cp, 0, size);
1938 if ((*addr >= '0') && (*addr <= '9')) {
1940 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1941 new = *addr - 'a' + 10;
1942 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1943 new = *addr - 'A' + 10;
1944 } else if (*addr == '\0')
1949 switch (state /* | INPUT */) {
1950 case GOTTWO | DIGIT:
1951 *cp++ = byte; /*FALLTHROUGH*/
1952 case VIRGIN | DIGIT:
1953 state = GOTONE; byte = new; continue;
1954 case GOTONE | DIGIT:
1955 state = GOTTWO; byte = new + (byte << 4); continue;
1956 default: /* | DELIM */
1957 state = VIRGIN; *cp++ = byte; byte = 0; continue;
1960 *cp++ = byte; /* FALLTHROUGH */
1965 } while (cp < cplim);
1966 sa->sa_len = cp - (char *)sa;