1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1983, 1989, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
18 *
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
29 * SUCH DAMAGE.
30 */
31
32 #ifndef lint
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";
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95";
41 #endif
42 #endif /* not lint */
43
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
46
47 #include <sys/param.h>
48 #include <sys/file.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>
54
55 #include <net/if.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>
61 #include <netdb.h>
62
63 #include <ctype.h>
64 #include <err.h>
65 #include <errno.h>
66 #include <paths.h>
67 #include <signal.h>
68 #include <stdbool.h>
69 #include <stdio.h>
70 #include <stdlib.h>
71 #include <string.h>
72 #include <sysexits.h>
73 #include <time.h>
74 #include <unistd.h>
75 #include <ifaddrs.h>
76
77 struct fibl {
78 TAILQ_ENTRY(fibl) fl_next;
79
80 int fl_num;
81 int fl_error;
82 int fl_errno;
83 };
84
85 static struct keytab {
86 const char *kt_cp;
87 int kt_i;
88 } const keywords[] = {
89 #include "keywords.h"
90 {0, 0}
91 };
92
93 static struct sockaddr_storage so[RTAX_MAX];
94 static int pid, rtm_addrs;
95 static int s;
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;
101 static uid_t uid;
102 static int defaultfib;
103 static int numfibs;
104 static char domain[MAXHOSTNAMELEN + 1];
105 static bool domain_initialized;
106 static int rtm_seq;
107 static char rt_line[NI_MAXHOST];
108 static char net_line[MAXHOSTNAMELEN + 1];
109
110 static struct {
111 struct rt_msghdr m_rtm;
112 char m_space[512];
113 } m_rtmsg;
114
115 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head;
116
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 *, int);
121 static int keyword(const char *);
122 #ifdef INET
123 static void inet_makemask(struct sockaddr_in *, u_long);
124 #endif
125 #ifdef INET6
126 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *);
127 #endif
128 static void interfaces(void);
129 static void monitor(int, char*[]);
130 static const char *netname(struct sockaddr *);
131 static void newroute(int, char **);
132 static int newroute_fib(int, char *, int);
133 static void pmsg_addrs(char *, int, size_t);
134 static void pmsg_common(struct rt_msghdr *, size_t);
135 static int prefixlen(const char *);
136 static void print_getmsg(struct rt_msghdr *, int, int);
137 static void print_rtmsg(struct rt_msghdr *, size_t);
138 static const char *routename(struct sockaddr *);
139 static int rtmsg(int, int, int);
140 static void set_metric(char *, int);
141 static int set_sofib(int);
142 static void sockaddr(char *, struct sockaddr *, size_t);
143 static void sodump(struct sockaddr *, const char *);
144 static int fiboptlist_csv(const char *, struct fibl_head_t *);
145 static int fiboptlist_range(const char *, struct fibl_head_t *);
146
147 static void usage(const char *) __dead2;
148
149 #define READ_TIMEOUT 10
150 static volatile sig_atomic_t stop_read;
151
152 static void
stopit(int sig __unused)153 stopit(int sig __unused)
154 {
155
156 stop_read = 1;
157 }
158
159 static void
usage(const char * cp)160 usage(const char *cp)
161 {
162 if (cp != NULL)
163 warnx("bad keyword: %s", cp);
164 errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]");
165 /* NOTREACHED */
166 }
167
168 int
main(int argc,char ** argv)169 main(int argc, char **argv)
170 {
171 int ch;
172 size_t len;
173
174 if (argc < 2)
175 usage(NULL);
176
177 while ((ch = getopt(argc, argv, "46nqdtv")) != -1)
178 switch(ch) {
179 case '4':
180 #ifdef INET
181 af = AF_INET;
182 aflen = sizeof(struct sockaddr_in);
183 #else
184 errx(1, "IPv4 support is not compiled in");
185 #endif
186 break;
187 case '6':
188 #ifdef INET6
189 af = AF_INET6;
190 aflen = sizeof(struct sockaddr_in6);
191 #else
192 errx(1, "IPv6 support is not compiled in");
193 #endif
194 break;
195 case 'n':
196 nflag = 1;
197 break;
198 case 'q':
199 qflag = 1;
200 break;
201 case 'v':
202 verbose = 1;
203 break;
204 case 't':
205 tflag = 1;
206 break;
207 case 'd':
208 debugonly = 1;
209 break;
210 case '?':
211 default:
212 usage(NULL);
213 }
214 argc -= optind;
215 argv += optind;
216
217 pid = getpid();
218 uid = geteuid();
219 if (tflag)
220 s = open(_PATH_DEVNULL, O_WRONLY, 0);
221 else
222 s = socket(PF_ROUTE, SOCK_RAW, 0);
223 if (s < 0)
224 err(EX_OSERR, "socket");
225
226 len = sizeof(numfibs);
227 if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1)
228 numfibs = -1;
229
230 len = sizeof(defaultfib);
231 if (numfibs != -1 &&
232 sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL,
233 0) == -1)
234 defaultfib = -1;
235
236 if (*argv != NULL)
237 switch (keyword(*argv)) {
238 case K_GET:
239 case K_SHOW:
240 uid = 0;
241 /* FALLTHROUGH */
242
243 case K_CHANGE:
244 case K_ADD:
245 case K_DEL:
246 case K_DELETE:
247 newroute(argc, argv);
248 /* NOTREACHED */
249
250 case K_MONITOR:
251 monitor(argc, argv);
252 /* NOTREACHED */
253
254 case K_FLUSH:
255 flushroutes(argc, argv);
256 exit(0);
257 /* NOTREACHED */
258 }
259 usage(*argv);
260 /* NOTREACHED */
261 }
262
263 static int
set_sofib(int fib)264 set_sofib(int fib)
265 {
266
267 if (fib < 0)
268 return (0);
269 return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib,
270 sizeof(fib)));
271 }
272
273 static int
fiboptlist_range(const char * arg,struct fibl_head_t * flh)274 fiboptlist_range(const char *arg, struct fibl_head_t *flh)
275 {
276 struct fibl *fl;
277 char *str0, *str, *token, *endptr;
278 int fib[2], i, error;
279
280 str0 = str = strdup(arg);
281 error = 0;
282 i = 0;
283 while ((token = strsep(&str, "-")) != NULL) {
284 switch (i) {
285 case 0:
286 case 1:
287 errno = 0;
288 fib[i] = strtol(token, &endptr, 0);
289 if (errno == 0) {
290 if (*endptr != '\0' ||
291 fib[i] < 0 ||
292 (numfibs != -1 && fib[i] > numfibs - 1))
293 errno = EINVAL;
294 }
295 if (errno)
296 error = 1;
297 break;
298 default:
299 error = 1;
300 }
301 if (error)
302 goto fiboptlist_range_ret;
303 i++;
304 }
305 if (fib[0] >= fib[1]) {
306 error = 1;
307 goto fiboptlist_range_ret;
308 }
309 for (i = fib[0]; i <= fib[1]; i++) {
310 fl = calloc(1, sizeof(*fl));
311 if (fl == NULL) {
312 error = 1;
313 goto fiboptlist_range_ret;
314 }
315 fl->fl_num = i;
316 TAILQ_INSERT_TAIL(flh, fl, fl_next);
317 }
318 fiboptlist_range_ret:
319 free(str0);
320 return (error);
321 }
322
323 #define ALLSTRLEN 64
324 static int
fiboptlist_csv(const char * arg,struct fibl_head_t * flh)325 fiboptlist_csv(const char *arg, struct fibl_head_t *flh)
326 {
327 struct fibl *fl;
328 char *str0, *str, *token, *endptr;
329 int fib, error;
330
331 str0 = str = NULL;
332 if (strcmp("all", arg) == 0) {
333 str = calloc(1, ALLSTRLEN);
334 if (str == NULL) {
335 error = 1;
336 goto fiboptlist_csv_ret;
337 }
338 if (numfibs > 1)
339 snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1);
340 else
341 snprintf(str, ALLSTRLEN - 1, "%d", 0);
342 } else if (strcmp("default", arg) == 0) {
343 str0 = str = calloc(1, ALLSTRLEN);
344 if (str == NULL) {
345 error = 1;
346 goto fiboptlist_csv_ret;
347 }
348 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib);
349 } else
350 str0 = str = strdup(arg);
351
352 error = 0;
353 while ((token = strsep(&str, ",")) != NULL) {
354 if (*token != '-' && strchr(token, '-') != NULL) {
355 error = fiboptlist_range(token, flh);
356 if (error)
357 goto fiboptlist_csv_ret;
358 } else {
359 errno = 0;
360 fib = strtol(token, &endptr, 0);
361 if (errno == 0) {
362 if (*endptr != '\0' ||
363 fib < 0 ||
364 (numfibs != -1 && fib > numfibs - 1))
365 errno = EINVAL;
366 }
367 if (errno) {
368 error = 1;
369 goto fiboptlist_csv_ret;
370 }
371 fl = calloc(1, sizeof(*fl));
372 if (fl == NULL) {
373 error = 1;
374 goto fiboptlist_csv_ret;
375 }
376 fl->fl_num = fib;
377 TAILQ_INSERT_TAIL(flh, fl, fl_next);
378 }
379 }
380 fiboptlist_csv_ret:
381 if (str0 != NULL)
382 free(str0);
383 return (error);
384 }
385
386 /*
387 * Purge all entries in the routing tables not
388 * associated with network interfaces.
389 */
390 static void
flushroutes(int argc,char * argv[])391 flushroutes(int argc, char *argv[])
392 {
393 struct fibl *fl;
394 int error;
395
396 if (uid != 0 && !debugonly && !tflag)
397 errx(EX_NOPERM, "must be root to alter routing table");
398 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
399
400 TAILQ_INIT(&fibl_head);
401 while (argc > 1) {
402 argc--;
403 argv++;
404 if (**argv != '-')
405 usage(*argv);
406 switch (keyword(*argv + 1)) {
407 #ifdef INET
408 case K_4:
409 case K_INET:
410 af = AF_INET;
411 break;
412 #endif
413 #ifdef INET6
414 case K_6:
415 case K_INET6:
416 af = AF_INET6;
417 break;
418 #endif
419 case K_LINK:
420 af = AF_LINK;
421 break;
422 case K_FIB:
423 if (!--argc)
424 usage(*argv);
425 error = fiboptlist_csv(*++argv, &fibl_head);
426 if (error)
427 errx(EX_USAGE, "invalid fib number: %s", *argv);
428 break;
429 default:
430 usage(*argv);
431 }
432 }
433 if (TAILQ_EMPTY(&fibl_head)) {
434 error = fiboptlist_csv("default", &fibl_head);
435 if (error)
436 errx(EX_OSERR, "fiboptlist_csv failed.");
437 }
438 TAILQ_FOREACH(fl, &fibl_head, fl_next)
439 flushroutes_fib(fl->fl_num);
440 }
441
442 static int
flushroutes_fib(int fib)443 flushroutes_fib(int fib)
444 {
445 struct rt_msghdr *rtm;
446 size_t needed;
447 char *buf, *next, *lim;
448 int mib[7], rlen, seqno, count = 0;
449 int error;
450
451 error = set_sofib(fib);
452 if (error) {
453 warn("fib number %d is ignored", fib);
454 return (error);
455 }
456
457 retry:
458 mib[0] = CTL_NET;
459 mib[1] = PF_ROUTE;
460 mib[2] = 0; /* protocol */
461 mib[3] = AF_UNSPEC;
462 mib[4] = NET_RT_DUMP;
463 mib[5] = 0; /* no flags */
464 mib[6] = fib;
465 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
466 err(EX_OSERR, "route-sysctl-estimate");
467 if ((buf = malloc(needed)) == NULL)
468 errx(EX_OSERR, "malloc failed");
469 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) {
470 if (errno == ENOMEM && count++ < 10) {
471 warnx("Routing table grew, retrying");
472 sleep(1);
473 free(buf);
474 goto retry;
475 }
476 err(EX_OSERR, "route-sysctl-get");
477 }
478 lim = buf + needed;
479 if (verbose)
480 (void)printf("Examining routing table from sysctl\n");
481 seqno = 0; /* ??? */
482 for (next = buf; next < lim; next += rtm->rtm_msglen) {
483 rtm = (struct rt_msghdr *)(void *)next;
484 if (verbose)
485 print_rtmsg(rtm, rtm->rtm_msglen);
486 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
487 continue;
488 if (af != 0) {
489 struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
490
491 if (sa->sa_family != af)
492 continue;
493 }
494 if (debugonly)
495 continue;
496 rtm->rtm_type = RTM_DELETE;
497 rtm->rtm_seq = seqno;
498 rlen = write(s, next, rtm->rtm_msglen);
499 if (rlen < 0 && errno == EPERM)
500 err(1, "write to routing socket");
501 if (rlen < (int)rtm->rtm_msglen) {
502 warn("write to routing socket");
503 (void)printf("got only %d for rlen\n", rlen);
504 free(buf);
505 goto retry;
506 break;
507 }
508 seqno++;
509 if (qflag)
510 continue;
511 if (verbose)
512 print_rtmsg(rtm, rlen);
513 else {
514 struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
515
516 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
517 routename(sa) : netname(sa));
518 sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
519 printf("%-20.20s ", routename(sa));
520 if (fib >= 0)
521 printf("-fib %-3d ", fib);
522 printf("done\n");
523 }
524 }
525 free(buf);
526 return (error);
527 }
528
529 static const char *
routename(struct sockaddr * sa)530 routename(struct sockaddr *sa)
531 {
532 struct sockaddr_dl *sdl;
533 const char *cp;
534 int n;
535
536 if (!domain_initialized) {
537 domain_initialized = true;
538 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
539 (cp = strchr(domain, '.'))) {
540 domain[MAXHOSTNAMELEN] = '\0';
541 (void)strcpy(domain, cp + 1);
542 } else
543 domain[0] = '\0';
544 }
545
546 /* If the address is zero-filled, use "default". */
547 if (sa->sa_len == 0 && nflag == 0)
548 return ("default");
549 #if defined(INET) || defined(INET6)
550 switch (sa->sa_family) {
551 #ifdef INET
552 case AF_INET:
553 /* If the address is zero-filled, use "default". */
554 if (nflag == 0 &&
555 ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr ==
556 INADDR_ANY)
557 return("default");
558 break;
559 #endif
560 #ifdef INET6
561 case AF_INET6:
562 /* If the address is zero-filled, use "default". */
563 if (nflag == 0 &&
564 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr))
565 return("default");
566 break;
567 #endif
568 }
569 #endif
570
571 switch (sa->sa_family) {
572 #if defined(INET) || defined(INET6)
573 #ifdef INET
574 case AF_INET:
575 #endif
576 #ifdef INET6
577 case AF_INET6:
578 #endif
579 {
580 struct sockaddr_storage ss;
581 int error;
582 char *p;
583
584 memset(&ss, 0, sizeof(ss));
585 if (sa->sa_len == 0)
586 ss.ss_family = sa->sa_family;
587 else
588 memcpy(&ss, sa, sa->sa_len);
589 /* Expand sa->sa_len because it could be shortened. */
590 if (sa->sa_family == AF_INET)
591 ss.ss_len = sizeof(struct sockaddr_in);
592 else if (sa->sa_family == AF_INET6)
593 ss.ss_len = sizeof(struct sockaddr_in6);
594 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len,
595 rt_line, sizeof(rt_line), NULL, 0,
596 (nflag == 0) ? 0 : NI_NUMERICHOST);
597 if (error) {
598 warnx("getnameinfo(): %s", gai_strerror(error));
599 strncpy(rt_line, "invalid", sizeof(rt_line));
600 }
601
602 /* Remove the domain part if any. */
603 p = strchr(rt_line, '.');
604 if (p != NULL && strcmp(p + 1, domain) == 0)
605 *p = '\0';
606
607 return (rt_line);
608 break;
609 }
610 #endif
611 case AF_LINK:
612 sdl = (struct sockaddr_dl *)(void *)sa;
613
614 if (sdl->sdl_nlen == 0 &&
615 sdl->sdl_alen == 0 &&
616 sdl->sdl_slen == 0) {
617 n = snprintf(rt_line, sizeof(rt_line), "link#%d",
618 sdl->sdl_index);
619 if (n > (int)sizeof(rt_line))
620 rt_line[0] = '\0';
621 return (rt_line);
622 } else
623 return (link_ntoa(sdl));
624 break;
625
626 default:
627 {
628 u_short *sp = (u_short *)(void *)sa;
629 u_short *splim = sp + ((sa->sa_len + 1) >> 1);
630 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family);
631 char *cpe = rt_line + sizeof(rt_line);
632
633 while (++sp < splim && cps < cpe) /* start with sa->sa_data */
634 if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0)
635 cps += n;
636 else
637 *cps = '\0';
638 break;
639 }
640 }
641 return (rt_line);
642 }
643
644 /*
645 * Return the name of the network whose address is given.
646 * The address is assumed to be that of a net, not a host.
647 */
648 static const char *
netname(struct sockaddr * sa)649 netname(struct sockaddr *sa)
650 {
651 struct sockaddr_dl *sdl;
652 int n;
653 #ifdef INET
654 struct netent *np = NULL;
655 const char *cp = NULL;
656 u_long i;
657 #endif
658
659 switch (sa->sa_family) {
660 #ifdef INET
661 case AF_INET:
662 {
663 struct in_addr in;
664
665 in = ((struct sockaddr_in *)(void *)sa)->sin_addr;
666 i = in.s_addr = ntohl(in.s_addr);
667 if (in.s_addr == 0)
668 cp = "default";
669 else if (!nflag) {
670 np = getnetbyaddr(i, AF_INET);
671 if (np != NULL)
672 cp = np->n_name;
673 }
674 #define C(x) (unsigned)((x) & 0xff)
675 if (cp != NULL)
676 strncpy(net_line, cp, sizeof(net_line));
677 else if ((in.s_addr & 0xffffff) == 0)
678 (void)sprintf(net_line, "%u", C(in.s_addr >> 24));
679 else if ((in.s_addr & 0xffff) == 0)
680 (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24),
681 C(in.s_addr >> 16));
682 else if ((in.s_addr & 0xff) == 0)
683 (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24),
684 C(in.s_addr >> 16), C(in.s_addr >> 8));
685 else
686 (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24),
687 C(in.s_addr >> 16), C(in.s_addr >> 8),
688 C(in.s_addr));
689 #undef C
690 break;
691 }
692 #endif
693 #ifdef INET6
694 case AF_INET6:
695 {
696 struct sockaddr_in6 sin6;
697 int niflags = 0;
698
699 memset(&sin6, 0, sizeof(sin6));
700 memcpy(&sin6, sa, sa->sa_len);
701 sin6.sin6_len = sizeof(sin6);
702 sin6.sin6_family = AF_INET6;
703 if (nflag)
704 niflags |= NI_NUMERICHOST;
705 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
706 net_line, sizeof(net_line), NULL, 0, niflags) != 0)
707 strncpy(net_line, "invalid", sizeof(net_line));
708
709 return(net_line);
710 }
711 #endif
712 case AF_LINK:
713 sdl = (struct sockaddr_dl *)(void *)sa;
714
715 if (sdl->sdl_nlen == 0 &&
716 sdl->sdl_alen == 0 &&
717 sdl->sdl_slen == 0) {
718 n = snprintf(net_line, sizeof(net_line), "link#%d",
719 sdl->sdl_index);
720 if (n > (int)sizeof(net_line))
721 net_line[0] = '\0';
722 return (net_line);
723 } else
724 return (link_ntoa(sdl));
725 break;
726
727 default:
728 {
729 u_short *sp = (u_short *)(void *)sa->sa_data;
730 u_short *splim = sp + ((sa->sa_len + 1)>>1);
731 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family);
732 char *cpe = net_line + sizeof(net_line);
733
734 while (sp < splim && cps < cpe)
735 if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0)
736 cps += n;
737 else
738 *cps = '\0';
739 break;
740 }
741 }
742 return (net_line);
743 }
744
745 static void
set_metric(char * value,int key)746 set_metric(char *value, int key)
747 {
748 int flag = 0;
749 char *endptr;
750 u_long noval, *valp = &noval;
751
752 switch (key) {
753 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
754 caseof(K_MTU, RTV_MTU, rmx_mtu);
755 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
756 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
757 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
758 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
759 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
760 caseof(K_RTT, RTV_RTT, rmx_rtt);
761 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
762 caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight);
763 }
764 rtm_inits |= flag;
765 if (lockrest || locking)
766 rt_metrics.rmx_locks |= flag;
767 if (locking)
768 locking = 0;
769 errno = 0;
770 *valp = strtol(value, &endptr, 0);
771 if (errno == 0 && *endptr != '\0')
772 errno = EINVAL;
773 if (errno)
774 err(EX_USAGE, "%s", value);
775 if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) {
776 struct timespec ts;
777
778 clock_gettime(CLOCK_REALTIME_FAST, &ts);
779 *valp += ts.tv_sec;
780 }
781 }
782
783 #define F_ISHOST 0x01
784 #define F_FORCENET 0x02
785 #define F_FORCEHOST 0x04
786 #define F_PROXY 0x08
787 #define F_INTERFACE 0x10
788
789 static void
newroute(int argc,char ** argv)790 newroute(int argc, char **argv)
791 {
792 struct sigaction sa;
793 struct fibl *fl;
794 char *cmd;
795 const char *dest, *gateway, *errmsg;
796 int key, error, flags, nrflags, fibnum;
797
798 if (uid != 0 && !debugonly && !tflag)
799 errx(EX_NOPERM, "must be root to alter routing table");
800 dest = NULL;
801 gateway = NULL;
802 flags = RTF_STATIC;
803 nrflags = 0;
804 TAILQ_INIT(&fibl_head);
805
806 sigemptyset(&sa.sa_mask);
807 sa.sa_flags = 0;
808 sa.sa_handler = stopit;
809 if (sigaction(SIGALRM, &sa, 0) == -1)
810 warn("sigaction SIGALRM");
811
812 cmd = argv[0];
813 if (*cmd != 'g' && *cmd != 's')
814 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
815 while (--argc > 0) {
816 if (**(++argv)== '-') {
817 switch (key = keyword(1 + *argv)) {
818 case K_LINK:
819 af = AF_LINK;
820 aflen = sizeof(struct sockaddr_dl);
821 break;
822 #ifdef INET
823 case K_4:
824 case K_INET:
825 af = AF_INET;
826 aflen = sizeof(struct sockaddr_in);
827 break;
828 #endif
829 #ifdef INET6
830 case K_6:
831 case K_INET6:
832 af = AF_INET6;
833 aflen = sizeof(struct sockaddr_in6);
834 break;
835 #endif
836 case K_SA:
837 af = PF_ROUTE;
838 aflen = sizeof(struct sockaddr_storage);
839 break;
840 case K_IFACE:
841 case K_INTERFACE:
842 nrflags |= F_INTERFACE;
843 break;
844 case K_NOSTATIC:
845 flags &= ~RTF_STATIC;
846 break;
847 case K_LOCK:
848 locking = 1;
849 break;
850 case K_LOCKREST:
851 lockrest = 1;
852 break;
853 case K_HOST:
854 nrflags |= F_FORCEHOST;
855 break;
856 case K_REJECT:
857 flags |= RTF_REJECT;
858 break;
859 case K_BLACKHOLE:
860 flags |= RTF_BLACKHOLE;
861 break;
862 case K_PROTO1:
863 flags |= RTF_PROTO1;
864 break;
865 case K_PROTO2:
866 flags |= RTF_PROTO2;
867 break;
868 case K_PROXY:
869 nrflags |= F_PROXY;
870 break;
871 case K_XRESOLVE:
872 flags |= RTF_XRESOLVE;
873 break;
874 case K_STATIC:
875 flags |= RTF_STATIC;
876 break;
877 case K_STICKY:
878 flags |= RTF_STICKY;
879 break;
880 case K_NOSTICK:
881 flags &= ~RTF_STICKY;
882 break;
883 case K_FIB:
884 if (!--argc)
885 usage(NULL);
886 error = fiboptlist_csv(*++argv, &fibl_head);
887 if (error)
888 errx(EX_USAGE,
889 "invalid fib number: %s", *argv);
890 break;
891 case K_IFA:
892 if (!--argc)
893 usage(NULL);
894 getaddr(RTAX_IFA, *++argv, nrflags);
895 break;
896 case K_IFP:
897 if (!--argc)
898 usage(NULL);
899 getaddr(RTAX_IFP, *++argv, nrflags);
900 break;
901 case K_GENMASK:
902 if (!--argc)
903 usage(NULL);
904 getaddr(RTAX_GENMASK, *++argv, nrflags);
905 break;
906 case K_GATEWAY:
907 if (!--argc)
908 usage(NULL);
909 getaddr(RTAX_GATEWAY, *++argv, nrflags);
910 gateway = *argv;
911 break;
912 case K_DST:
913 if (!--argc)
914 usage(NULL);
915 if (getaddr(RTAX_DST, *++argv, nrflags))
916 nrflags |= F_ISHOST;
917 dest = *argv;
918 break;
919 case K_NETMASK:
920 if (!--argc)
921 usage(NULL);
922 getaddr(RTAX_NETMASK, *++argv, nrflags);
923 /* FALLTHROUGH */
924 case K_NET:
925 nrflags |= F_FORCENET;
926 break;
927 case K_PREFIXLEN:
928 if (!--argc)
929 usage(NULL);
930 if (prefixlen(*++argv) == -1) {
931 nrflags &= ~F_FORCENET;
932 nrflags |= F_ISHOST;
933 } else {
934 nrflags |= F_FORCENET;
935 nrflags &= ~F_ISHOST;
936 }
937 break;
938 case K_MTU:
939 case K_HOPCOUNT:
940 case K_EXPIRE:
941 case K_RECVPIPE:
942 case K_SENDPIPE:
943 case K_SSTHRESH:
944 case K_RTT:
945 case K_RTTVAR:
946 case K_WEIGHT:
947 if (!--argc)
948 usage(NULL);
949 set_metric(*++argv, key);
950 break;
951 default:
952 usage(1+*argv);
953 }
954 } else {
955 if ((rtm_addrs & RTA_DST) == 0) {
956 dest = *argv;
957 if (getaddr(RTAX_DST, *argv, nrflags))
958 nrflags |= F_ISHOST;
959 } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
960 gateway = *argv;
961 getaddr(RTAX_GATEWAY, *argv, nrflags);
962 } else {
963 getaddr(RTAX_NETMASK, *argv, nrflags);
964 nrflags |= F_FORCENET;
965 }
966 }
967 }
968
969 /* Do some sanity checks on resulting request */
970 if (so[RTAX_DST].ss_len == 0) {
971 warnx("destination parameter required");
972 usage(NULL);
973 }
974
975 if (so[RTAX_NETMASK].ss_len != 0 &&
976 so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) {
977 warnx("destination and netmask family need to be the same");
978 usage(NULL);
979 }
980
981 if (nrflags & F_FORCEHOST) {
982 nrflags |= F_ISHOST;
983 #ifdef INET6
984 if (af == AF_INET6) {
985 rtm_addrs &= ~RTA_NETMASK;
986 memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK]));
987 }
988 #endif
989 }
990 if (nrflags & F_FORCENET)
991 nrflags &= ~F_ISHOST;
992 flags |= RTF_UP;
993 if (nrflags & F_ISHOST)
994 flags |= RTF_HOST;
995 if ((nrflags & F_INTERFACE) == 0)
996 flags |= RTF_GATEWAY;
997 if (nrflags & F_PROXY)
998 flags |= RTF_ANNOUNCE;
999 if (dest == NULL)
1000 dest = "";
1001 if (gateway == NULL)
1002 gateway = "";
1003
1004 if (TAILQ_EMPTY(&fibl_head)) {
1005 error = fiboptlist_csv("default", &fibl_head);
1006 if (error)
1007 errx(EX_OSERR, "fiboptlist_csv failed.");
1008 }
1009 error = 0;
1010 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1011 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags);
1012 if (fl->fl_error)
1013 fl->fl_errno = errno;
1014 error += fl->fl_error;
1015 }
1016 if (*cmd == 'g' || *cmd == 's')
1017 exit(error);
1018
1019 error = 0;
1020 if (!qflag) {
1021 fibnum = 0;
1022 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1023 if (fl->fl_error == 0)
1024 fibnum++;
1025 }
1026 if (fibnum > 0) {
1027 int firstfib = 1;
1028
1029 printf("%s %s %s", cmd,
1030 (nrflags & F_ISHOST) ? "host" : "net", dest);
1031 if (*gateway)
1032 printf(": gateway %s", gateway);
1033
1034 if (numfibs > 1) {
1035 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1036 if (fl->fl_error == 0
1037 && fl->fl_num >= 0) {
1038 if (firstfib) {
1039 printf(" fib ");
1040 firstfib = 0;
1041 }
1042 printf("%d", fl->fl_num);
1043 if (fibnum-- > 1)
1044 printf(",");
1045 }
1046 }
1047 }
1048 printf("\n");
1049 }
1050 }
1051
1052 fibnum = 0;
1053 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1054 if (fl->fl_error != 0) {
1055 error = 1;
1056 if (!qflag) {
1057 printf("%s %s %s", cmd, (nrflags & F_ISHOST)
1058 ? "host" : "net", dest);
1059 if (*gateway)
1060 printf(": gateway %s", gateway);
1061
1062 if (fl->fl_num >= 0)
1063 printf(" fib %d", fl->fl_num);
1064
1065 switch (fl->fl_errno) {
1066 case ESRCH:
1067 errmsg = "not in table";
1068 break;
1069 case EBUSY:
1070 errmsg = "entry in use";
1071 break;
1072 case ENOBUFS:
1073 errmsg = "not enough memory";
1074 break;
1075 case EADDRINUSE:
1076 /*
1077 * handle recursion avoidance
1078 * in rt_setgate()
1079 */
1080 errmsg = "gateway uses the same route";
1081 break;
1082 case EEXIST:
1083 errmsg = "route already in table";
1084 break;
1085 default:
1086 errmsg = strerror(fl->fl_errno);
1087 break;
1088 }
1089 printf(": %s\n", errmsg);
1090 }
1091 }
1092 }
1093 exit(error);
1094 }
1095
1096 static int
newroute_fib(int fib,char * cmd,int flags)1097 newroute_fib(int fib, char *cmd, int flags)
1098 {
1099 int error;
1100
1101 error = set_sofib(fib);
1102 if (error) {
1103 warn("fib number %d is ignored", fib);
1104 return (error);
1105 }
1106
1107 error = rtmsg(*cmd, flags, fib);
1108 return (error);
1109 }
1110
1111 #ifdef INET
1112 static void
inet_makemask(struct sockaddr_in * sin_mask,u_long bits)1113 inet_makemask(struct sockaddr_in *sin_mask, u_long bits)
1114 {
1115 u_long mask = 0;
1116
1117 rtm_addrs |= RTA_NETMASK;
1118
1119 if (bits != 0)
1120 mask = 0xffffffff << (32 - bits);
1121
1122 sin_mask->sin_addr.s_addr = htonl(mask);
1123 sin_mask->sin_len = sizeof(struct sockaddr_in);
1124 sin_mask->sin_family = AF_INET;
1125 }
1126 #endif
1127
1128 #ifdef INET6
1129 /*
1130 * XXX the function may need more improvement...
1131 */
1132 static int
inet6_makenetandmask(struct sockaddr_in6 * sin6,const char * plen)1133 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
1134 {
1135
1136 if (plen == NULL) {
1137 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
1138 sin6->sin6_scope_id == 0)
1139 plen = "0";
1140 }
1141
1142 if (plen == NULL || strcmp(plen, "128") == 0)
1143 return (1);
1144 rtm_addrs |= RTA_NETMASK;
1145 prefixlen(plen);
1146 return (0);
1147 }
1148 #endif
1149
1150 /*
1151 * Interpret an argument as a network address of some kind,
1152 * returning 1 if a host address, 0 if a network address.
1153 */
1154 static int
getaddr(int idx,char * str,int nrflags)1155 getaddr(int idx, char *str, int nrflags)
1156 {
1157 struct sockaddr *sa;
1158 #if defined(INET)
1159 struct sockaddr_in *sin;
1160 struct hostent *hp;
1161 char *q;
1162 #elif defined(INET6)
1163 char *q;
1164 #endif
1165
1166 if (idx < 0 || idx >= RTAX_MAX)
1167 usage("internal error");
1168 if (af == 0) {
1169 #if defined(INET)
1170 af = AF_INET;
1171 aflen = sizeof(struct sockaddr_in);
1172 #elif defined(INET6)
1173 af = AF_INET6;
1174 aflen = sizeof(struct sockaddr_in6);
1175 #else
1176 af = AF_LINK;
1177 aflen = sizeof(struct sockaddr_dl);
1178 #endif
1179 }
1180 rtm_addrs |= (1 << idx);
1181 sa = (struct sockaddr *)&so[idx];
1182 sa->sa_family = af;
1183 sa->sa_len = aflen;
1184
1185 switch (idx) {
1186 case RTAX_GATEWAY:
1187 if (nrflags & F_INTERFACE) {
1188 struct ifaddrs *ifap, *ifa;
1189 struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa;
1190 struct sockaddr_dl *sdl = NULL;
1191
1192 if (getifaddrs(&ifap))
1193 err(EX_OSERR, "getifaddrs");
1194
1195 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
1196 if (ifa->ifa_addr->sa_family != AF_LINK)
1197 continue;
1198
1199 if (strcmp(str, ifa->ifa_name) != 0)
1200 continue;
1201
1202 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr;
1203 }
1204 /* If we found it, then use it */
1205 if (sdl != NULL) {
1206 /*
1207 * Note that we need to copy before calling
1208 * freeifaddrs().
1209 */
1210 memcpy(sdl0, sdl, sdl->sdl_len);
1211 }
1212 freeifaddrs(ifap);
1213 if (sdl != NULL)
1214 return(1);
1215 else
1216 errx(EX_DATAERR,
1217 "interface '%s' does not exist", str);
1218 }
1219 break;
1220 case RTAX_IFP:
1221 sa->sa_family = AF_LINK;
1222 break;
1223 }
1224 if (strcmp(str, "default") == 0) {
1225 /*
1226 * Default is net 0.0.0.0/0
1227 */
1228 switch (idx) {
1229 case RTAX_DST:
1230 nrflags |= F_FORCENET;
1231 getaddr(RTAX_NETMASK, str, nrflags);
1232 break;
1233 }
1234 return (0);
1235 }
1236 switch (sa->sa_family) {
1237 #ifdef INET6
1238 case AF_INET6:
1239 {
1240 struct addrinfo hints, *res;
1241 int ecode;
1242
1243 q = NULL;
1244 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL)
1245 *q = '\0';
1246 memset(&hints, 0, sizeof(hints));
1247 hints.ai_family = sa->sa_family;
1248 hints.ai_socktype = SOCK_DGRAM;
1249 ecode = getaddrinfo(str, NULL, &hints, &res);
1250 if (ecode != 0 || res->ai_family != AF_INET6 ||
1251 res->ai_addrlen != sizeof(struct sockaddr_in6))
1252 errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode));
1253 memcpy(sa, res->ai_addr, res->ai_addrlen);
1254 freeaddrinfo(res);
1255 if (q != NULL)
1256 *q++ = '/';
1257 if (idx == RTAX_DST)
1258 return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q));
1259 return (0);
1260 }
1261 #endif /* INET6 */
1262 case AF_LINK:
1263 link_addr(str, (struct sockaddr_dl *)(void *)sa);
1264 return (1);
1265
1266 case PF_ROUTE:
1267 sockaddr(str, sa, sizeof(struct sockaddr_storage));
1268 return (1);
1269 #ifdef INET
1270 case AF_INET:
1271 #endif
1272 default:
1273 break;
1274 }
1275
1276 #ifdef INET
1277 sin = (struct sockaddr_in *)(void *)sa;
1278
1279 q = strchr(str,'/');
1280 if (q != NULL && idx == RTAX_DST) {
1281 /* A.B.C.D/NUM */
1282 *q = '\0';
1283 if (inet_aton(str, &sin->sin_addr) == 0)
1284 errx(EX_NOHOST, "bad address: %s", str);
1285
1286 int masklen = strtol(q + 1, NULL, 10);
1287 if (masklen < 0 || masklen > 32)
1288 errx(EX_NOHOST, "bad mask length: %s", q + 1);
1289
1290 inet_makemask((struct sockaddr_in *)&so[RTAX_NETMASK],masklen);
1291 return (0);
1292 }
1293 if (inet_aton(str, &sin->sin_addr) != 0)
1294 return (1);
1295
1296 hp = gethostbyname(str);
1297 if (hp != NULL) {
1298 sin->sin_family = hp->h_addrtype;
1299 memmove((char *)&sin->sin_addr, hp->h_addr,
1300 MIN((size_t)hp->h_length, sizeof(sin->sin_addr)));
1301 return (1);
1302 }
1303 #endif
1304 errx(EX_NOHOST, "bad address: %s", str);
1305 }
1306
1307 static int
prefixlen(const char * str)1308 prefixlen(const char *str)
1309 {
1310 int len = atoi(str), q, r;
1311 int max;
1312 char *p;
1313
1314 rtm_addrs |= RTA_NETMASK;
1315 switch (af) {
1316 #ifdef INET6
1317 case AF_INET6:
1318 {
1319 struct sockaddr_in6 *sin6 =
1320 (struct sockaddr_in6 *)&so[RTAX_NETMASK];
1321
1322 max = 128;
1323 p = (char *)&sin6->sin6_addr;
1324 sin6->sin6_family = AF_INET6;
1325 sin6->sin6_len = sizeof(*sin6);
1326 break;
1327 }
1328 #endif
1329 #ifdef INET
1330 case AF_INET:
1331 {
1332 struct sockaddr_in *sin =
1333 (struct sockaddr_in *)&so[RTAX_NETMASK];
1334
1335 max = 32;
1336 p = (char *)&sin->sin_addr;
1337 sin->sin_family = AF_INET;
1338 sin->sin_len = sizeof(*sin);
1339 break;
1340 }
1341 #endif
1342 default:
1343 errx(EX_OSERR, "prefixlen not supported in this af");
1344 }
1345
1346 if (len < 0 || max < len)
1347 errx(EX_USAGE, "%s: invalid prefixlen", str);
1348
1349 q = len >> 3;
1350 r = len & 7;
1351 memset((void *)p, 0, max / 8);
1352 if (q > 0)
1353 memset((void *)p, 0xff, q);
1354 if (r > 0)
1355 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1356 if (len == max)
1357 return (-1);
1358 else
1359 return (len);
1360 }
1361
1362 static void
interfaces(void)1363 interfaces(void)
1364 {
1365 size_t needed;
1366 int mib[6];
1367 char *buf, *lim, *next, count = 0;
1368 struct rt_msghdr *rtm;
1369
1370 retry2:
1371 mib[0] = CTL_NET;
1372 mib[1] = PF_ROUTE;
1373 mib[2] = 0; /* protocol */
1374 mib[3] = AF_UNSPEC;
1375 mib[4] = NET_RT_IFLIST;
1376 mib[5] = 0; /* no flags */
1377 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
1378 err(EX_OSERR, "route-sysctl-estimate");
1379 if ((buf = malloc(needed)) == NULL)
1380 errx(EX_OSERR, "malloc failed");
1381 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) {
1382 if (errno == ENOMEM && count++ < 10) {
1383 warnx("Routing table grew, retrying");
1384 sleep(1);
1385 free(buf);
1386 goto retry2;
1387 }
1388 err(EX_OSERR, "actual retrieval of interface table");
1389 }
1390 lim = buf + needed;
1391 for (next = buf; next < lim; next += rtm->rtm_msglen) {
1392 rtm = (struct rt_msghdr *)(void *)next;
1393 print_rtmsg(rtm, rtm->rtm_msglen);
1394 }
1395 free(buf);
1396 }
1397
1398 static void
monitor(int argc,char * argv[])1399 monitor(int argc, char *argv[])
1400 {
1401 int n, fib, error;
1402 char msg[2048], *endptr;
1403
1404 fib = defaultfib;
1405 while (argc > 1) {
1406 argc--;
1407 argv++;
1408 if (**argv != '-')
1409 usage(*argv);
1410 switch (keyword(*argv + 1)) {
1411 case K_FIB:
1412 if (!--argc)
1413 usage(*argv);
1414 errno = 0;
1415 fib = strtol(*++argv, &endptr, 0);
1416 if (errno == 0) {
1417 if (*endptr != '\0' ||
1418 fib < 0 ||
1419 (numfibs != -1 && fib > numfibs - 1))
1420 errno = EINVAL;
1421 }
1422 if (errno)
1423 errx(EX_USAGE, "invalid fib number: %s", *argv);
1424 break;
1425 default:
1426 usage(*argv);
1427 }
1428 }
1429 error = set_sofib(fib);
1430 if (error)
1431 errx(EX_USAGE, "invalid fib number: %d", fib);
1432
1433 verbose = 1;
1434 if (debugonly) {
1435 interfaces();
1436 exit(0);
1437 }
1438
1439 #ifdef SO_RERROR
1440 n = 1;
1441 if (setsockopt(s, SOL_SOCKET, SO_RERROR, &n, sizeof(n)) == -1)
1442 warn("SO_RERROR");
1443 #endif
1444
1445 for (;;) {
1446 time_t now;
1447 n = read(s, msg, sizeof(msg));
1448 if (n == -1) {
1449 warn("read");
1450 continue;
1451 }
1452 now = time(NULL);
1453 (void)printf("\ngot message of size %d on %s", n, ctime(&now));
1454 print_rtmsg((struct rt_msghdr *)(void *)msg, n);
1455 }
1456 }
1457
1458 static int
rtmsg(int cmd,int flags,int fib)1459 rtmsg(int cmd, int flags, int fib)
1460 {
1461 int rlen;
1462 char *cp = m_rtmsg.m_space;
1463 int l;
1464
1465 #define NEXTADDR(w, u) \
1466 if (rtm_addrs & (w)) { \
1467 l = SA_SIZE(&(u)); \
1468 memmove(cp, (char *)&(u), l); \
1469 cp += l; \
1470 if (verbose) \
1471 sodump((struct sockaddr *)&(u), #w); \
1472 }
1473
1474 errno = 0;
1475 memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1476 if (cmd == 'a')
1477 cmd = RTM_ADD;
1478 else if (cmd == 'c')
1479 cmd = RTM_CHANGE;
1480 else if (cmd == 'g' || cmd == 's') {
1481 cmd = RTM_GET;
1482 if (so[RTAX_IFP].ss_family == 0) {
1483 so[RTAX_IFP].ss_family = AF_LINK;
1484 so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl);
1485 rtm_addrs |= RTA_IFP;
1486 }
1487 } else {
1488 cmd = RTM_DELETE;
1489 flags |= RTF_PINNED;
1490 }
1491 #define rtm m_rtmsg.m_rtm
1492 rtm.rtm_type = cmd;
1493 rtm.rtm_flags = flags;
1494 rtm.rtm_version = RTM_VERSION;
1495 rtm.rtm_seq = ++rtm_seq;
1496 rtm.rtm_addrs = rtm_addrs;
1497 rtm.rtm_rmx = rt_metrics;
1498 rtm.rtm_inits = rtm_inits;
1499
1500 NEXTADDR(RTA_DST, so[RTAX_DST]);
1501 NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]);
1502 NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]);
1503 NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]);
1504 NEXTADDR(RTA_IFP, so[RTAX_IFP]);
1505 NEXTADDR(RTA_IFA, so[RTAX_IFA]);
1506 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1507 if (verbose)
1508 print_rtmsg(&rtm, l);
1509 if (debugonly)
1510 return (0);
1511 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1512 switch (errno) {
1513 case EPERM:
1514 err(1, "writing to routing socket");
1515 break;
1516 case ESRCH:
1517 warnx("route has not been found");
1518 break;
1519 case EEXIST:
1520 /* Handled by newroute() */
1521 break;
1522 default:
1523 warn("writing to routing socket");
1524 }
1525 return (-1);
1526 }
1527 if (cmd == RTM_GET) {
1528 stop_read = 0;
1529 alarm(READ_TIMEOUT);
1530 do {
1531 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1532 } while (l > 0 && stop_read == 0 &&
1533 (rtm.rtm_type != RTM_GET || rtm.rtm_seq != rtm_seq ||
1534 rtm.rtm_pid != pid));
1535 if (stop_read != 0) {
1536 warnx("read from routing socket timed out");
1537 return (-1);
1538 } else
1539 alarm(0);
1540 if (l < 0)
1541 warn("read from routing socket");
1542 else
1543 print_getmsg(&rtm, l, fib);
1544 }
1545 #undef rtm
1546 return (0);
1547 }
1548
1549 static const char *const msgtypes[] = {
1550 "",
1551 "RTM_ADD: Add Route",
1552 "RTM_DELETE: Delete Route",
1553 "RTM_CHANGE: Change Metrics or flags",
1554 "RTM_GET: Report Metrics",
1555 "RTM_LOSING: Kernel Suspects Partitioning",
1556 "RTM_REDIRECT: Told to use different route",
1557 "RTM_MISS: Lookup failed on this address",
1558 "RTM_LOCK: fix specified metrics",
1559 "RTM_OLDADD: caused by SIOCADDRT",
1560 "RTM_OLDDEL: caused by SIOCDELRT",
1561 "RTM_RESOLVE: Route created by cloning",
1562 "RTM_NEWADDR: address being added to iface",
1563 "RTM_DELADDR: address being removed from iface",
1564 "RTM_IFINFO: iface status change",
1565 "RTM_NEWMADDR: new multicast group membership on iface",
1566 "RTM_DELMADDR: multicast group membership removed from iface",
1567 "RTM_IFANNOUNCE: interface arrival/departure",
1568 "RTM_IEEE80211: IEEE 802.11 wireless event",
1569 };
1570
1571 static const char metricnames[] =
1572 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire"
1573 "\1mtu";
1574 static const char routeflags[] =
1575 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE"
1576 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE"
1577 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3"
1578 "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY";
1579 static const char ifnetflags[] =
1580 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1581 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1582 "\017LINK2\020MULTICAST";
1583 static const char addrnames[] =
1584 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1585
1586 static const char errfmt[] =
1587 "\n%s: truncated route message, only %zu bytes left\n";
1588
1589 static void
print_rtmsg(struct rt_msghdr * rtm,size_t msglen)1590 print_rtmsg(struct rt_msghdr *rtm, size_t msglen)
1591 {
1592 struct if_msghdr *ifm;
1593 struct ifa_msghdr *ifam;
1594 #ifdef RTM_NEWMADDR
1595 struct ifma_msghdr *ifmam;
1596 #endif
1597 struct if_announcemsghdr *ifan;
1598 const char *state;
1599
1600 if (verbose == 0)
1601 return;
1602 if (rtm->rtm_version != RTM_VERSION) {
1603 (void)printf("routing message version %d not understood\n",
1604 rtm->rtm_version);
1605 return;
1606 }
1607 if (rtm->rtm_type < nitems(msgtypes))
1608 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1609 else
1610 (void)printf("unknown type %d: ", rtm->rtm_type);
1611 (void)printf("len %d, ", rtm->rtm_msglen);
1612
1613 #define REQUIRE(x) do { \
1614 if (msglen < sizeof(x)) \
1615 goto badlen; \
1616 else \
1617 msglen -= sizeof(x); \
1618 } while (0)
1619
1620 switch (rtm->rtm_type) {
1621 case RTM_IFINFO:
1622 REQUIRE(struct if_msghdr);
1623 ifm = (struct if_msghdr *)rtm;
1624 (void)printf("if# %d, ", ifm->ifm_index);
1625 switch (ifm->ifm_data.ifi_link_state) {
1626 case LINK_STATE_DOWN:
1627 state = "down";
1628 break;
1629 case LINK_STATE_UP:
1630 state = "up";
1631 break;
1632 default:
1633 state = "unknown";
1634 break;
1635 }
1636 (void)printf("link: %s, flags:", state);
1637 printb(ifm->ifm_flags, ifnetflags);
1638 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen);
1639 break;
1640 case RTM_NEWADDR:
1641 case RTM_DELADDR:
1642 REQUIRE(struct ifa_msghdr);
1643 ifam = (struct ifa_msghdr *)rtm;
1644 (void)printf("metric %d, flags:", ifam->ifam_metric);
1645 printb(ifam->ifam_flags, routeflags);
1646 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen);
1647 break;
1648 #ifdef RTM_NEWMADDR
1649 case RTM_NEWMADDR:
1650 case RTM_DELMADDR:
1651 REQUIRE(struct ifma_msghdr);
1652 ifmam = (struct ifma_msghdr *)rtm;
1653 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen);
1654 break;
1655 #endif
1656 case RTM_IFANNOUNCE:
1657 REQUIRE(struct if_announcemsghdr);
1658 ifan = (struct if_announcemsghdr *)rtm;
1659 (void)printf("if# %d, what: ", ifan->ifan_index);
1660 switch (ifan->ifan_what) {
1661 case IFAN_ARRIVAL:
1662 (void)printf("arrival");
1663 break;
1664 case IFAN_DEPARTURE:
1665 printf("departure");
1666 break;
1667 default:
1668 printf("#%d", ifan->ifan_what);
1669 break;
1670 }
1671 printf("\n");
1672 fflush(stdout);
1673 break;
1674
1675 default:
1676 if (rtm->rtm_type <= RTM_RESOLVE) {
1677 printf("pid: %ld, seq %d, errno %d, flags:",
1678 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1679 printb(rtm->rtm_flags, routeflags);
1680 pmsg_common(rtm, msglen);
1681 } else
1682 printf("type: %u, len: %zu\n", rtm->rtm_type, msglen);
1683 }
1684
1685 return;
1686
1687 badlen:
1688 (void)printf(errfmt, __func__, msglen);
1689 #undef REQUIRE
1690 }
1691
1692 static void
print_getmsg(struct rt_msghdr * rtm,int msglen,int fib)1693 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib)
1694 {
1695 struct sockaddr *sp[RTAX_MAX];
1696 struct timespec ts;
1697 char *cp;
1698 int i;
1699
1700 memset(sp, 0, sizeof(sp));
1701 (void)printf(" route to: %s\n",
1702 routename((struct sockaddr *)&so[RTAX_DST]));
1703 if (rtm->rtm_version != RTM_VERSION) {
1704 warnx("routing message version %d not understood",
1705 rtm->rtm_version);
1706 return;
1707 }
1708 if (rtm->rtm_msglen > msglen) {
1709 warnx("message length mismatch, in packet %d, returned %d",
1710 rtm->rtm_msglen, msglen);
1711 return;
1712 }
1713 if (rtm->rtm_errno) {
1714 errno = rtm->rtm_errno;
1715 warn("message indicates error %d", errno);
1716 return;
1717 }
1718 cp = ((char *)(rtm + 1));
1719 for (i = 0; i < RTAX_MAX; i++)
1720 if (rtm->rtm_addrs & (1 << i)) {
1721 sp[i] = (struct sockaddr *)cp;
1722 cp += SA_SIZE((struct sockaddr *)cp);
1723 }
1724 if ((rtm->rtm_addrs & RTA_IFP) &&
1725 (sp[RTAX_IFP]->sa_family != AF_LINK ||
1726 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0))
1727 sp[RTAX_IFP] = NULL;
1728 if (sp[RTAX_DST])
1729 (void)printf("destination: %s\n", routename(sp[RTAX_DST]));
1730 if (sp[RTAX_NETMASK])
1731 (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK]));
1732 if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY))
1733 (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY]));
1734 if (fib >= 0)
1735 (void)printf(" fib: %u\n", (unsigned int)fib);
1736 if (sp[RTAX_IFP])
1737 (void)printf(" interface: %.*s\n",
1738 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen,
1739 ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data);
1740 (void)printf(" flags: ");
1741 printb(rtm->rtm_flags, routeflags);
1742
1743 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1744 #define msec(u) (((u) + 500) / 1000) /* usec to msec */
1745 printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe",
1746 "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire");
1747 printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1748 printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1749 printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1750 printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1751 printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1752 printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT));
1753 if (rtm->rtm_rmx.rmx_expire > 0)
1754 clock_gettime(CLOCK_REALTIME_FAST, &ts);
1755 else
1756 ts.tv_sec = 0;
1757 printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec),
1758 lock(EXPIRE));
1759 #undef lock
1760 #undef msec
1761 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1762 if (verbose)
1763 pmsg_common(rtm, msglen);
1764 else if (rtm->rtm_addrs &~ RTA_IGN) {
1765 (void)printf("sockaddrs: ");
1766 printb(rtm->rtm_addrs, addrnames);
1767 putchar('\n');
1768 }
1769 #undef RTA_IGN
1770 }
1771
1772 static void
pmsg_common(struct rt_msghdr * rtm,size_t msglen)1773 pmsg_common(struct rt_msghdr *rtm, size_t msglen)
1774 {
1775
1776 (void)printf("\nlocks: ");
1777 printb(rtm->rtm_rmx.rmx_locks, metricnames);
1778 (void)printf(" inits: ");
1779 printb(rtm->rtm_inits, metricnames);
1780 if (msglen > sizeof(struct rt_msghdr))
1781 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs,
1782 msglen - sizeof(struct rt_msghdr));
1783 else
1784 (void)fflush(stdout);
1785 }
1786
1787 static void
pmsg_addrs(char * cp,int addrs,size_t len)1788 pmsg_addrs(char *cp, int addrs, size_t len)
1789 {
1790 struct sockaddr *sa;
1791 int i;
1792
1793 if (addrs == 0) {
1794 (void)putchar('\n');
1795 return;
1796 }
1797 (void)printf("\nsockaddrs: ");
1798 printb(addrs, addrnames);
1799 putchar('\n');
1800 for (i = 0; i < RTAX_MAX; i++)
1801 if (addrs & (1 << i)) {
1802 sa = (struct sockaddr *)cp;
1803 if (len == 0 || len < SA_SIZE(sa)) {
1804 (void)printf(errfmt, __func__, len);
1805 break;
1806 }
1807 (void)printf(" %s", routename(sa));
1808 len -= SA_SIZE(sa);
1809 cp += SA_SIZE(sa);
1810 }
1811 (void)putchar('\n');
1812 (void)fflush(stdout);
1813 }
1814
1815 static void
printb(int b,const char * str)1816 printb(int b, const char *str)
1817 {
1818 int i;
1819 int gotsome = 0;
1820
1821 if (b == 0)
1822 return;
1823 while ((i = *str++) != 0) {
1824 if (b & (1 << (i-1))) {
1825 if (gotsome == 0)
1826 i = '<';
1827 else
1828 i = ',';
1829 putchar(i);
1830 gotsome = 1;
1831 for (; (i = *str) > 32; str++)
1832 putchar(i);
1833 } else
1834 while (*str > 32)
1835 str++;
1836 }
1837 if (gotsome)
1838 putchar('>');
1839 }
1840
1841 int
keyword(const char * cp)1842 keyword(const char *cp)
1843 {
1844 const struct keytab *kt = keywords;
1845
1846 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
1847 kt++;
1848 return (kt->kt_i);
1849 }
1850
1851 static void
sodump(struct sockaddr * sa,const char * which)1852 sodump(struct sockaddr *sa, const char *which)
1853 {
1854 #ifdef INET6
1855 char nbuf[INET6_ADDRSTRLEN];
1856 #endif
1857
1858 switch (sa->sa_family) {
1859 case AF_LINK:
1860 (void)printf("%s: link %s; ", which,
1861 link_ntoa((struct sockaddr_dl *)(void *)sa));
1862 break;
1863 #ifdef INET
1864 case AF_INET:
1865 (void)printf("%s: inet %s; ", which,
1866 inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr));
1867 break;
1868 #endif
1869 #ifdef INET6
1870 case AF_INET6:
1871 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family,
1872 &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf,
1873 sizeof(nbuf)));
1874 break;
1875 #endif
1876 }
1877 (void)fflush(stdout);
1878 }
1879
1880 /* States*/
1881 #define VIRGIN 0
1882 #define GOTONE 1
1883 #define GOTTWO 2
1884 /* Inputs */
1885 #define DIGIT (4*0)
1886 #define END (4*1)
1887 #define DELIM (4*2)
1888
1889 static void
sockaddr(char * addr,struct sockaddr * sa,size_t size)1890 sockaddr(char *addr, struct sockaddr *sa, size_t size)
1891 {
1892 char *cp = (char *)sa;
1893 char *cplim = cp + size;
1894 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1895
1896 memset(cp, 0, size);
1897 cp++;
1898 do {
1899 if ((*addr >= '0') && (*addr <= '9')) {
1900 new = *addr - '0';
1901 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1902 new = *addr - 'a' + 10;
1903 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1904 new = *addr - 'A' + 10;
1905 } else if (*addr == '\0')
1906 state |= END;
1907 else
1908 state |= DELIM;
1909 addr++;
1910 switch (state /* | INPUT */) {
1911 case GOTTWO | DIGIT:
1912 *cp++ = byte; /*FALLTHROUGH*/
1913 case VIRGIN | DIGIT:
1914 state = GOTONE; byte = new; continue;
1915 case GOTONE | DIGIT:
1916 state = GOTTWO; byte = new + (byte << 4); continue;
1917 default: /* | DELIM */
1918 state = VIRGIN; *cp++ = byte; byte = 0; continue;
1919 case GOTONE | END:
1920 case GOTTWO | END:
1921 *cp++ = byte; /* FALLTHROUGH */
1922 case VIRGIN | END:
1923 break;
1924 }
1925 break;
1926 } while (cp < cplim);
1927 sa->sa_len = cp - (char *)sa;
1928 }
1929