1 /* $NetBSD: route.c,v 1.169 2022/04/10 09:50:45 andvar Exp $ */
2
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 #include <sys/cdefs.h>
33 #ifndef lint
34 __COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1991, 1993\
35 The Regents of the University of California. All rights reserved.");
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95";
41 #else
42 __RCSID("$NetBSD: route.c,v 1.169 2022/04/10 09:50:45 andvar Exp $");
43 #endif
44 #endif /* not lint */
45
46 #include <sys/param.h>
47 #include <sys/file.h>
48 #include <sys/socket.h>
49 #include <sys/ioctl.h>
50 #include <sys/sysctl.h>
51
52 #include <net/if.h>
53 #include <net/route.h>
54 #include <net/if_dl.h>
55 #include <net80211/ieee80211_netbsd.h>
56 #include <netinet/in.h>
57 #include <netinet/in_var.h>
58 #include <netatalk/at.h>
59 #include <netmpls/mpls.h>
60 #include <arpa/inet.h>
61 #include <netdb.h>
62
63 #include <errno.h>
64 #include <unistd.h>
65 #include <stdio.h>
66 #include <ctype.h>
67 #include <stdlib.h>
68 #include <string.h>
69 #include <time.h>
70 #include <paths.h>
71 #include <err.h>
72 #include <util.h>
73
74 #include "keywords.h"
75 #include "extern.h"
76 #include "prog_ops.h"
77 #include "rtutil.h"
78
79 union sockunion {
80 struct sockaddr sa;
81 struct sockaddr_in sin;
82 #ifdef INET6
83 struct sockaddr_in6 sin6;
84 #endif
85 struct sockaddr_at sat;
86 struct sockaddr_dl sdl;
87 #ifndef SMALL
88 struct sockaddr_mpls smpls;
89 #endif /* SMALL */
90 struct sockaddr_storage sstorage;
91 };
92
93 typedef union sockunion *sup;
94
95 struct sou {
96 union sockunion *so_dst, *so_gate, *so_mask, *so_genmask, *so_ifa,
97 *so_ifp, *so_mpls;
98 };
99
100 static const char *route_strerror(int);
101 static void set_metric(const char *, int);
102 static int newroute(int, char *const *);
103 static void inet_makenetandmask(u_int32_t, struct sockaddr_in *, struct sou *);
104 #ifdef INET6
105 static int inet6_makenetandmask(const struct sockaddr_in6 *, struct sou *);
106 #endif
107 static int getaddr(int, const char *, struct hostent **, struct sou *);
108 static int flushroutes(int, char *const [], int);
109 static char *netmask_string(const struct sockaddr *, int, int);
110 static int prefixlen(const char *, struct sou *);
111 #ifndef SMALL
112 static void interfaces(void);
113 static void monitor(int, char * const *);
114 static int print_getmsg(struct rt_msghdr *, int, struct sou *);
115 static const char *linkstate(struct if_msghdr *);
116 static sup readtag(sup, const char *);
117 static void addtag(sup, const char *, int);
118 #endif /* SMALL */
119 static int rtmsg(int, int, struct sou *);
120 static void mask_addr(struct sou *);
121 static void print_rtmsg(struct rt_msghdr *, int);
122 static void pmsg_common(struct rt_msghdr *);
123 static void pmsg_addrs(const char *, int);
124 static void bprintf(FILE *, int, const char *);
125 static void sodump(sup, const char *);
126 static void sockaddr(const char *, struct sockaddr *);
127
128 int pid, rtm_addrs;
129 int sock;
130 int forcehost, forcenet, doflush, af;
131 int iflag, Lflag, nflag, qflag, tflag, Sflag, Tflag;
132 int verbose, aflen = sizeof(struct sockaddr_in), rtag;
133 int locking, lockrest, debugonly, shortoutput;
134 struct rt_metrics rt_metrics;
135 int rtm_inits;
136 short ns_nullh[] = {0,0,0};
137 short ns_bh[] = {-1,-1,-1};
138
139 static const char opts[] = "dfLnqSsTtv";
140
141 void
usage(const char * cp)142 usage(const char *cp)
143 {
144
145 if (cp)
146 warnx("botched keyword: %s", cp);
147 (void)fprintf(stderr,
148 "Usage: %s [-%s] cmd [[-<qualifiers>] args]\n", getprogname(), opts);
149 exit(1);
150 /* NOTREACHED */
151 }
152
153 #define PRIETHER "02x:%02x:%02x:%02x:%02x:%02x"
154 #define PRIETHER_ARGS(__enaddr) (__enaddr)[0], (__enaddr)[1], (__enaddr)[2], \
155 (__enaddr)[3], (__enaddr)[4], (__enaddr)[5]
156
157 int
main(int argc,char * const * argv)158 main(int argc, char * const *argv)
159 {
160 int ch;
161
162 if (argc < 2)
163 usage(NULL);
164
165 while ((ch = getopt(argc, argv, opts)) != -1)
166 switch (ch) {
167 case 'd':
168 debugonly = 1;
169 break;
170 case 'f':
171 doflush = 1;
172 break;
173 case 'L':
174 Lflag = RT_LFLAG;
175 break;
176 case 'n':
177 nflag = RT_NFLAG;
178 break;
179 case 'q':
180 qflag = 1;
181 break;
182 case 'S':
183 Sflag = 1;
184 break;
185 case 's':
186 shortoutput = 1;
187 break;
188 case 'T':
189 Tflag = RT_TFLAG;
190 break;
191 case 't':
192 tflag = 1;
193 break;
194 case 'v':
195 verbose = RT_VFLAG;
196 break;
197 case '?':
198 default:
199 usage(NULL);
200 /*NOTREACHED*/
201 }
202 argc -= optind;
203 argv += optind;
204
205 if (prog_init && prog_init() == -1)
206 err(1, "init failed");
207
208 pid = prog_getpid();
209 if (tflag)
210 sock = prog_open("/dev/null", O_WRONLY, 0);
211 else {
212 int on = 1;
213
214 sock = prog_socket(PF_ROUTE, SOCK_RAW, 0);
215 if (prog_setsockopt(sock, SOL_SOCKET, SO_RERROR,
216 &on, sizeof(on)) == -1)
217 warn("SO_RERROR");
218 }
219 if (sock < 0)
220 err(EXIT_FAILURE, "socket");
221
222 if (*argv == NULL) {
223 if (doflush)
224 ch = K_FLUSH;
225 else
226 goto no_cmd;
227 } else
228 ch = keyword(*argv);
229
230 switch (ch) {
231 #ifndef SMALL
232 case K_GET:
233 #endif /* SMALL */
234 case K_CHANGE:
235 case K_ADD:
236 case K_DELETE:
237 if (doflush)
238 (void)flushroutes(1, argv, 0);
239 return newroute(argc, argv);
240
241 case K_SHOW:
242 show(argc, argv, Lflag|nflag|Tflag|verbose);
243 return 0;
244
245 #ifndef SMALL
246 case K_MONITOR:
247 monitor(argc, argv);
248 return 0;
249
250 #endif /* SMALL */
251 case K_FLUSH:
252 return flushroutes(argc, argv, 0);
253
254 case K_FLUSHALL:
255 return flushroutes(argc, argv, 1);
256 no_cmd:
257 default:
258 usage(*argv);
259 /*NOTREACHED*/
260 }
261 }
262
263 static char *
netmask_string(const struct sockaddr * mask,int len,int family)264 netmask_string(const struct sockaddr *mask, int len, int family)
265 {
266 static char smask[INET6_ADDRSTRLEN];
267 struct sockaddr_in nsin;
268 struct sockaddr_in6 nsin6;
269
270 if (len >= 0)
271 snprintf(smask, sizeof(smask), "%d", len);
272 else {
273 switch (family) {
274 case AF_INET:
275 memset(&nsin, 0, sizeof(nsin));
276 memcpy(&nsin, mask, mask->sa_len);
277 snprintf(smask, sizeof(smask), "%s",
278 inet_ntoa(nsin.sin_addr));
279 break;
280 case AF_INET6:
281 memset(&nsin6, 0, sizeof(nsin6));
282 memcpy(&nsin6, mask, mask->sa_len);
283 inet_ntop(family, &nsin6.sin6_addr, smask,
284 sizeof(smask));
285 break;
286 default:
287 snprintf(smask, sizeof(smask), "%s", any_ntoa(mask));
288 }
289 }
290
291 return smask;
292 }
293 /*
294 * Purge all entries in the routing tables not
295 * associated with network interfaces.
296 */
297 static int
flushroutes(int argc,char * const argv[],int doall)298 flushroutes(int argc, char * const argv[], int doall)
299 {
300 struct sockaddr *sa;
301 size_t needed;
302 int flags, mib[6], rlen, seqno;
303 char *buf, *next, *lim;
304 const char *afname;
305 struct rt_msghdr *rtm;
306
307 flags = 0;
308 af = AF_UNSPEC;
309 /* Don't want to read back our messages */
310 prog_shutdown(sock, SHUT_RD);
311 parse_show_opts(argc, argv, &af, &flags, &afname, false);
312 mib[0] = CTL_NET;
313 mib[1] = PF_ROUTE;
314 mib[2] = 0; /* protocol */
315 mib[3] = 0; /* wildcard address family */
316 mib[4] = NET_RT_DUMP;
317 mib[5] = 0; /* no flags */
318 if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
319 err(EXIT_FAILURE, "route-sysctl-estimate");
320 buf = lim = NULL;
321 if (needed) {
322 if ((buf = malloc(needed)) == NULL)
323 err(EXIT_FAILURE, "malloc");
324 if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
325 err(EXIT_FAILURE, "actual retrieval of routing table");
326 lim = buf + needed;
327 }
328 if (verbose) {
329 (void)printf("Examining routing table from sysctl\n");
330 if (af != AF_UNSPEC)
331 printf("(address family %s)\n", afname);
332 }
333 if (needed == 0)
334 return 0;
335 seqno = 0; /* ??? */
336 for (next = buf; next < lim; next += rtm->rtm_msglen) {
337 rtm = (struct rt_msghdr *)next;
338 sa = (struct sockaddr *)(rtm + 1);
339 if (verbose)
340 print_rtmsg(rtm, rtm->rtm_msglen);
341 if ((rtm->rtm_flags & flags) != flags)
342 continue;
343 if (!(rtm->rtm_flags & (RTF_GATEWAY | RTF_STATIC)) && !doall)
344 continue;
345 if (af != AF_UNSPEC && sa->sa_family != af)
346 continue;
347 if (debugonly)
348 continue;
349 rtm->rtm_type = RTM_DELETE;
350 rtm->rtm_seq = seqno;
351 do {
352 rlen = prog_write(sock, next, rtm->rtm_msglen);
353 } while (rlen == -1 && errno == ENOBUFS);
354 if (rlen == -1) {
355 warnx("writing to routing socket: %s",
356 route_strerror(errno));
357 return 1;
358 }
359 if (rlen < (int)rtm->rtm_msglen) {
360 warnx("write to routing socket, got %d for rlen", rlen);
361 return 1;
362 }
363 seqno++;
364 if (qflag)
365 continue;
366 if (verbose)
367 print_rtmsg(rtm, rlen);
368 else {
369 (void)printf("%-20.20s ", netname(sa, NULL, nflag));
370 sa = (struct sockaddr *)(RT_ROUNDUP(sa->sa_len) +
371 (char *)sa);
372 (void)printf("%-20.20s ", routename(sa, nflag));
373 (void)printf("done\n");
374 }
375 }
376 free(buf);
377 return 0;
378 }
379
380 static const char *
route_strerror(int error)381 route_strerror(int error)
382 {
383
384 switch (error) {
385 case ESRCH:
386 return "not in table";
387 case EBUSY:
388 return "entry in use";
389 case ENOBUFS:
390 return "routing table overflow";
391 default:
392 return strerror(error);
393 }
394 }
395
396 static void
set_metric(const char * value,int key)397 set_metric(const char *value, int key)
398 {
399 int flag = 0;
400 uint64_t noval, *valp = &noval;
401
402 switch (key) {
403 #define caseof(x, y, z) \
404 case x: valp = (uint64_t *)&rt_metrics.z; flag = y; break
405 caseof(K_MTU, RTV_MTU, rmx_mtu);
406 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
407 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
408 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
409 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
410 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
411 caseof(K_RTT, RTV_RTT, rmx_rtt);
412 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
413 }
414 rtm_inits |= flag;
415 if (lockrest || locking)
416 rt_metrics.rmx_locks |= flag;
417 if (locking)
418 locking = 0;
419 *valp = strtoul(value, NULL, 0);
420 }
421
422 static int
newroute(int argc,char * const * argv)423 newroute(int argc, char *const *argv)
424 {
425 const char *cmd, *dest = "", *gateway = "";
426 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC;
427 int key;
428 struct hostent *hp = 0;
429 struct sou sou, *soup = &sou;
430
431 sou.so_dst = calloc(1, sizeof(union sockunion));
432 sou.so_gate = calloc(1, sizeof(union sockunion));
433 sou.so_mask = calloc(1, sizeof(union sockunion));
434 sou.so_genmask = calloc(1, sizeof(union sockunion));
435 sou.so_ifa = calloc(1, sizeof(union sockunion));
436 sou.so_ifp = calloc(1, sizeof(union sockunion));
437 sou.so_mpls = calloc(1, sizeof(union sockunion));
438
439 if (sou.so_dst == NULL || sou.so_gate == NULL || sou.so_mask == NULL ||
440 sou.so_genmask == NULL || sou.so_ifa == NULL || sou.so_ifp == NULL ||
441 sou.so_mpls == NULL)
442 errx(EXIT_FAILURE, "Cannot allocate memory");
443
444 cmd = argv[0];
445 af = AF_UNSPEC;
446 if (*cmd != 'g') {
447 /* Don't want to read back our messages */
448 prog_shutdown(sock, SHUT_RD);
449 }
450 while (--argc > 0) {
451 if (**(++argv)== '-') {
452 switch (key = keyword(1 + *argv)) {
453
454 case K_SA:
455 af = PF_ROUTE;
456 aflen = sizeof(union sockunion);
457 break;
458
459 #ifndef SMALL
460 case K_ATALK:
461 af = AF_APPLETALK;
462 aflen = sizeof(struct sockaddr_at);
463 break;
464 #endif
465
466 case K_INET:
467 af = AF_INET;
468 aflen = sizeof(struct sockaddr_in);
469 break;
470
471 #ifdef INET6
472 case K_INET6:
473 af = AF_INET6;
474 aflen = sizeof(struct sockaddr_in6);
475 break;
476 #endif
477
478 case K_LINK:
479 af = AF_LINK;
480 aflen = sizeof(struct sockaddr_dl);
481 break;
482
483 #ifndef SMALL
484 case K_MPLS:
485 af = AF_MPLS;
486 aflen = sizeof(struct sockaddr_mpls);
487 break;
488 case K_TAG:
489 if (!--argc)
490 usage(1+*argv);
491 af = AF_MPLS;
492 aflen = sizeof(struct sockaddr_mpls);
493 (void)getaddr(RTA_TAG, *++argv, 0, soup);
494 break;
495 #endif /* SMALL */
496
497 case K_IFACE:
498 case K_INTERFACE:
499 iflag++;
500 break;
501 case K_NOSTATIC:
502 flags &= ~RTF_STATIC;
503 break;
504 case K_LOCK:
505 locking = 1;
506 break;
507 case K_LOCKREST:
508 lockrest = 1;
509 break;
510 case K_HOST:
511 forcehost++;
512 break;
513 case K_REJECT:
514 flags |= RTF_REJECT;
515 break;
516 case K_NOREJECT:
517 flags &= ~RTF_REJECT;
518 break;
519 case K_BLACKHOLE:
520 flags |= RTF_BLACKHOLE;
521 break;
522 case K_NOBLACKHOLE:
523 flags &= ~RTF_BLACKHOLE;
524 break;
525 case K_PROTO1:
526 flags |= RTF_PROTO1;
527 break;
528 case K_PROTO2:
529 flags |= RTF_PROTO2;
530 break;
531 case K_PROXY:
532 flags |= RTF_ANNOUNCE;
533 break;
534 case K_CONNECTED:
535 flags |= RTF_CONNECTED;
536 break;
537 case K_NOCONNECTED:
538 flags &= ~RTF_CONNECTED;
539 break;
540 case K_STATIC:
541 flags |= RTF_STATIC;
542 break;
543 case K_IFA:
544 if (!--argc)
545 usage(1+*argv);
546 (void)getaddr(RTA_IFA, *++argv, 0, soup);
547 break;
548 case K_IFP:
549 if (!--argc)
550 usage(1+*argv);
551 (void)getaddr(RTA_IFP, *++argv, 0, soup);
552 break;
553 case K_GENMASK:
554 if (!--argc)
555 usage(1+*argv);
556 (void)getaddr(RTA_GENMASK, *++argv, 0, soup);
557 break;
558 case K_GATEWAY:
559 if (!--argc)
560 usage(1+*argv);
561 (void)getaddr(RTA_GATEWAY, *++argv, 0, soup);
562 break;
563 case K_DST:
564 if (!--argc)
565 usage(1+*argv);
566 ishost = getaddr(RTA_DST, *++argv, &hp, soup);
567 dest = *argv;
568 break;
569 case K_NETMASK:
570 if (!--argc)
571 usage(1+*argv);
572 (void)getaddr(RTA_NETMASK, *++argv, 0, soup);
573 /* FALLTHROUGH */
574 case K_NET:
575 forcenet++;
576 break;
577 case K_PREFIXLEN:
578 if (!--argc)
579 usage(1+*argv);
580 ishost = prefixlen(*++argv, soup);
581 break;
582 case K_MTU:
583 case K_HOPCOUNT:
584 case K_EXPIRE:
585 case K_RECVPIPE:
586 case K_SENDPIPE:
587 case K_SSTHRESH:
588 case K_RTT:
589 case K_RTTVAR:
590 if (!--argc)
591 usage(1+*argv);
592 set_metric(*++argv, key);
593 break;
594 default:
595 usage(1+*argv);
596 }
597 } else {
598 if ((rtm_addrs & RTA_DST) == 0) {
599 dest = *argv;
600 ishost = getaddr(RTA_DST, *argv, &hp, soup);
601 } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
602 gateway = *argv;
603 (void)getaddr(RTA_GATEWAY, *argv, &hp, soup);
604 } else {
605 ret = atoi(*argv);
606
607 if (ret == 0) {
608 if (strcmp(*argv, "0") == 0) {
609 if (!qflag) {
610 warnx("%s, %s",
611 "old usage of trailing 0",
612 "assuming route to if");
613 }
614 } else
615 usage(NULL);
616 iflag = 1;
617 continue;
618 } else if (ret > 0 && ret < 10) {
619 if (!qflag) {
620 warnx("%s, %s",
621 "old usage of trailing digit",
622 "assuming route via gateway");
623 }
624 iflag = 0;
625 continue;
626 }
627 (void)getaddr(RTA_NETMASK, *argv, 0, soup);
628 }
629 }
630 }
631 if ((rtm_addrs & RTA_DST) == 0)
632 errx(EXIT_FAILURE, "missing destination specification");
633 if (*cmd == 'a' && (rtm_addrs & RTA_GATEWAY) == 0)
634 errx(EXIT_FAILURE, "missing gateway specification");
635 if (forcehost && forcenet)
636 errx(EXIT_FAILURE, "-host and -net conflict");
637 else if (forcehost)
638 ishost = 1;
639 else if (forcenet)
640 ishost = 0;
641 flags |= RTF_UP;
642 if (ishost)
643 flags |= RTF_HOST;
644 if (iflag == 0)
645 flags |= RTF_GATEWAY;
646 for (attempts = 1; ; attempts++) {
647 errno = 0;
648 if ((ret = rtmsg(*cmd, flags, soup)) == 0)
649 break;
650 if (errno != ENETUNREACH && errno != ESRCH)
651 break;
652 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
653 hp->h_addr_list++;
654 memmove(&soup->so_gate->sin.sin_addr, hp->h_addr_list[0],
655 hp->h_length);
656 } else
657 break;
658 }
659 if (*cmd == 'g' || qflag)
660 goto out;
661
662 oerrno = errno;
663 (void)printf("%s %s %s", cmd, ishost? "host" : "net", dest);
664 if (*gateway) {
665 (void)printf(": gateway %s", gateway);
666 if (attempts > 1 && ret == 0 && af == AF_INET)
667 (void)printf(" (%s)",
668 inet_ntoa(soup->so_gate->sin.sin_addr));
669 }
670 if (ret == 0)
671 (void)printf("\n");
672 else
673 (void)printf(": %s\n", route_strerror(oerrno));
674 out:
675 free(sou.so_dst);
676 free(sou.so_gate);
677 free(sou.so_mask);
678 free(sou.so_genmask);
679 free(sou.so_ifa);
680 free(sou.so_ifp);
681 free(sou.so_mpls);
682
683 return ret != 0;
684 }
685
686 static void
inet_makenetandmask(const u_int32_t net,struct sockaddr_in * const isin,struct sou * soup)687 inet_makenetandmask(const u_int32_t net, struct sockaddr_in * const isin,
688 struct sou *soup)
689 {
690 struct sockaddr_in *sin;
691 u_int32_t addr, mask = 0;
692 char *cp;
693
694 rtm_addrs |= RTA_NETMASK;
695 if (net == 0)
696 mask = addr = 0;
697 else if (net < 128) {
698 addr = net << IN_CLASSA_NSHIFT;
699 mask = IN_CLASSA_NET;
700 } else if (net < 192) {
701 addr = net << IN_CLASSA_NSHIFT;
702 mask = IN_CLASSB_NET;
703 } else if (net < 224) {
704 addr = net << IN_CLASSA_NSHIFT;
705 mask = IN_CLASSC_NET;
706 } else if (net < 256) {
707 addr = net << IN_CLASSA_NSHIFT;
708 mask = IN_CLASSD_NET;
709 } else if (net < 49152) { /* 192 * 256 */
710 addr = net << IN_CLASSB_NSHIFT;
711 mask = IN_CLASSB_NET;
712 } else if (net < 57344) { /* 224 * 256 */
713 addr = net << IN_CLASSB_NSHIFT;
714 mask = IN_CLASSC_NET;
715 } else if (net < 65536) {
716 addr = net << IN_CLASSB_NSHIFT;
717 mask = IN_CLASSB_NET;
718 } else if (net < 14680064L) { /* 224 * 65536 */
719 addr = net << IN_CLASSC_NSHIFT;
720 mask = IN_CLASSC_NET;
721 } else if (net < 16777216L) {
722 addr = net << IN_CLASSC_NSHIFT;
723 mask = IN_CLASSD_NET;
724 } else {
725 addr = net;
726 if ((addr & IN_CLASSA_HOST) == 0)
727 mask = IN_CLASSA_NET;
728 else if ((addr & IN_CLASSB_HOST) == 0)
729 mask = IN_CLASSB_NET;
730 else if ((addr & IN_CLASSC_HOST) == 0)
731 mask = IN_CLASSC_NET;
732 else
733 mask = -1;
734 }
735 isin->sin_addr.s_addr = htonl(addr);
736 sin = &soup->so_mask->sin;
737 sin->sin_addr.s_addr = htonl(mask);
738 sin->sin_len = 0;
739 sin->sin_family = 0;
740 cp = (char *)(&sin->sin_addr + 1);
741 while (*--cp == 0 && cp > (char *)sin)
742 ;
743 sin->sin_len = 1 + cp - (char *)sin;
744 sin->sin_family = AF_INET;
745 }
746
747 #ifdef INET6
748 /*
749 * XXX the function may need more improvement...
750 */
751 static int
inet6_makenetandmask(const struct sockaddr_in6 * const sin6,struct sou * soup)752 inet6_makenetandmask(const struct sockaddr_in6 * const sin6, struct sou *soup)
753 {
754 const char *plen;
755 struct in6_addr in6;
756
757 plen = NULL;
758 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
759 sin6->sin6_scope_id == 0) {
760 plen = "0";
761 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
762 /* aggregatable global unicast - RFC2374 */
763 memset(&in6, 0, sizeof(in6));
764 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8))
765 plen = "64";
766 }
767
768 if (!plen || strcmp(plen, "128") == 0)
769 return 1;
770 else {
771 rtm_addrs |= RTA_NETMASK;
772 (void)prefixlen(plen, soup);
773 return 0;
774 }
775 }
776 #endif
777
778 /*
779 * Interpret an argument as a network address of some kind,
780 * returning 1 if a host address, 0 if a network address.
781 */
782 static int
getaddr(int which,const char * s,struct hostent ** hpp,struct sou * soup)783 getaddr(int which, const char *s, struct hostent **hpp, struct sou *soup)
784 {
785 sup su;
786 struct hostent *hp;
787 struct netent *np;
788 u_int32_t val;
789 char *t;
790 int afamily; /* local copy of af so we can change it */
791
792 if (af == AF_UNSPEC) {
793 af = AF_INET;
794 aflen = sizeof(struct sockaddr_in);
795 }
796 afamily = af;
797 rtm_addrs |= which;
798 switch (which) {
799 case RTA_DST:
800 su = soup->so_dst;
801 break;
802 case RTA_GATEWAY:
803 su = soup->so_gate;
804 break;
805 case RTA_NETMASK:
806 su = soup->so_mask;
807 break;
808 case RTA_GENMASK:
809 su = soup->so_genmask;
810 break;
811 case RTA_IFP:
812 su = soup->so_ifp;
813 afamily = AF_LINK;
814 break;
815 case RTA_IFA:
816 su = soup->so_ifa;
817 su->sa.sa_family = af;
818 break;
819 #ifndef SMALL
820 case RTA_TAG:
821 su = soup->so_mpls;
822 afamily = AF_MPLS;
823 break;
824 #endif
825 default:
826 su = NULL;
827 usage("Internal Error");
828 /*NOTREACHED*/
829 }
830 su->sa.sa_len = aflen;
831 su->sa.sa_family = afamily; /* cases that don't want it have left already */
832 if (strcmp(s, "default") == 0) {
833 switch (which) {
834 case RTA_DST:
835 forcenet++;
836 (void)getaddr(RTA_NETMASK, s, 0, soup);
837 break;
838 case RTA_NETMASK:
839 case RTA_GENMASK:
840 su->sa.sa_len = 0;
841 }
842 return 0;
843 }
844 switch (afamily) {
845 #ifdef INET6
846 case AF_INET6:
847 {
848 struct addrinfo hints, *res;
849 char *slash = 0;
850
851 if (which == RTA_DST && (slash = (strrchr(s, '/'))) != 0)
852 *slash = '\0';
853 memset(&hints, 0, sizeof(hints));
854 hints.ai_family = afamily; /*AF_INET6*/
855 hints.ai_flags = AI_NUMERICHOST;
856 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
857 if (getaddrinfo(s, "0", &hints, &res) != 0) {
858 hints.ai_flags = 0;
859 if (slash) {
860 *slash = '/';
861 slash = 0;
862 }
863 if (getaddrinfo(s, "0", &hints, &res) != 0)
864 errx(EXIT_FAILURE, "%s: bad value", s);
865 }
866 if (slash)
867 *slash = '/';
868 if (sizeof(su->sin6) != res->ai_addrlen)
869 errx(EXIT_FAILURE, "%s: bad value", s);
870 if (res->ai_next) {
871 errx(EXIT_FAILURE,
872 "%s: address resolved to multiple values", s);
873 }
874 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
875 freeaddrinfo(res);
876 inet6_putscopeid(&su->sin6, INET6_IS_ADDR_LINKLOCAL|
877 INET6_IS_ADDR_MC_LINKLOCAL);
878 if (hints.ai_flags == AI_NUMERICHOST) {
879 if (slash)
880 return prefixlen(slash + 1, soup);
881 if (which == RTA_DST)
882 return inet6_makenetandmask(&su->sin6, soup);
883 return 0;
884 } else
885 return 1;
886 }
887 #endif
888
889 case PF_ROUTE:
890 su->sa.sa_len = sizeof(*su);
891 sockaddr(s, &su->sa);
892 return 1;
893
894 #ifndef SMALL
895 case AF_APPLETALK:
896 t = strchr (s, '.');
897 if (!t) {
898 badataddr:
899 errx(EXIT_FAILURE, "bad address: %s", s);
900 }
901 val = atoi (s);
902 if (val > 65535)
903 goto badataddr;
904 su->sat.sat_addr.s_net = val;
905 val = atoi (t);
906 if (val > 256)
907 goto badataddr;
908 su->sat.sat_addr.s_node = val;
909 rtm_addrs |= RTA_NETMASK;
910 return(forcehost || su->sat.sat_addr.s_node != 0);
911 case AF_MPLS:
912 if (which == RTA_DST)
913 soup->so_dst = readtag(su, s);
914 else if (which == RTA_TAG)
915 soup->so_mpls = readtag(su, s);
916 else
917 errx(EXIT_FAILURE, "MPLS can be used only as "
918 "DST or TAG");
919 return 1;
920 #endif
921
922 case AF_LINK:
923 link_addr(s, &su->sdl);
924 return 1;
925
926 case AF_INET:
927 default:
928 break;
929 }
930
931 if (hpp == NULL)
932 hpp = &hp;
933 *hpp = NULL;
934
935 if ((t = strchr(s, '/')) != NULL && which == RTA_DST) {
936 *t = '\0';
937 if (forcenet == 0) {
938 if ((val = inet_addr(s)) != INADDR_NONE) {
939 inet_makenetandmask(htonl(val), &su->sin, soup);
940 return prefixlen(&t[1], soup);
941 }
942 } else {
943 if ((val = inet_network(s)) != INADDR_NONE) {
944 inet_makenetandmask(val, &su->sin, soup);
945 return prefixlen(&t[1], soup);
946 }
947 }
948 *t = '/';
949 }
950 if (inet_aton(s, &su->sin.sin_addr) &&
951 (which != RTA_DST || forcenet == 0)) {
952 val = su->sin.sin_addr.s_addr;
953 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
954 return 1;
955 else {
956 val = ntohl(val);
957 goto netdone;
958 }
959 }
960 if ((val = inet_network(s)) != INADDR_NONE ||
961 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) {
962 netdone:
963 if (which == RTA_DST)
964 inet_makenetandmask(val, &su->sin, soup);
965 return 0;
966 }
967 hp = gethostbyname(s);
968 if (hp) {
969 *hpp = hp;
970 su->sin.sin_family = hp->h_addrtype;
971 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length);
972 return 1;
973 }
974 errx(EXIT_FAILURE, "%s: bad value", s);
975 /*NOTREACHED*/
976 }
977
978 #ifndef SMALL
979 static sup
readtag(sup su,const char * s)980 readtag(sup su, const char *s)
981 {
982 char *p, *n, *norig;
983 int mplssize = 0;
984 sup retsu = su;
985
986 n = strdup(s);
987 if (n == NULL)
988 errx(EXIT_FAILURE, "%s: Cannot allocate memory", s);
989 norig = n;
990 for (uint i = 0; i < strlen(n); i++)
991 if(n[i] == ',')
992 mplssize++;
993
994 #define MPLS_NEW_SIZE (sizeof(struct sockaddr_mpls) + \
995 mplssize * sizeof(union mpls_shim))
996
997 if (mplssize != 0 && sizeof(union sockunion) < MPLS_NEW_SIZE) {
998 free(su);
999 retsu = malloc(MPLS_NEW_SIZE);
1000 retsu->smpls.smpls_family = AF_MPLS;
1001 }
1002 retsu->smpls.smpls_len = MPLS_NEW_SIZE;
1003 mplssize = 0;
1004 while ((p = strchr(n, ',')) != NULL) {
1005 p[0] = '\0';
1006 addtag(retsu, n, mplssize);
1007 n = p + 1;
1008 mplssize++;
1009 }
1010 addtag(retsu, n, mplssize);
1011
1012 free(norig);
1013 return retsu;
1014 }
1015
1016 static void
addtag(sup su,const char * s,int where)1017 addtag(sup su, const char *s, int where)
1018 {
1019 union mpls_shim *ms = &su->smpls.smpls_addr;
1020
1021 if (atoi(s) < 0 || atoi(s) >= (1 << 20))
1022 errx(EXIT_FAILURE, "%s: Bad tag", s);
1023 ms[where].s_addr = 0;
1024 ms[where].shim.label = atoi(s);
1025 ms[where].s_addr = htonl(ms[where].s_addr);
1026 }
1027 #endif /* SMALL */
1028
1029 int
prefixlen(const char * s,struct sou * soup)1030 prefixlen(const char *s, struct sou *soup)
1031 {
1032 int max, len = atoi(s);
1033 #ifdef INET6
1034 int q, r;
1035 #endif
1036
1037 switch (af) {
1038 case AF_INET:
1039 max = sizeof(struct in_addr) * 8;
1040 break;
1041 #ifdef INET6
1042 case AF_INET6:
1043 max = sizeof(struct in6_addr) * 8;
1044 break;
1045 #endif
1046 default:
1047 errx(EXIT_FAILURE, "prefixlen is not supported with af %d", af);
1048 /*NOTREACHED*/
1049 }
1050
1051 rtm_addrs |= RTA_NETMASK;
1052 if (len < -1 || len > max)
1053 errx(EXIT_FAILURE, "%s: bad value", s);
1054
1055 #ifdef INET6
1056 q = len >> 3;
1057 r = len & 7;
1058 #endif
1059 switch (af) {
1060 case AF_INET:
1061 memset(soup->so_mask, 0, sizeof(*soup->so_mask));
1062 soup->so_mask->sin.sin_family = AF_INET;
1063 soup->so_mask->sin.sin_len = sizeof(struct sockaddr_in);
1064 soup->so_mask->sin.sin_addr.s_addr = (len == 0 ? 0
1065 : htonl(0xffffffff << (32 - len)));
1066 break;
1067 #ifdef INET6
1068 case AF_INET6:
1069 soup->so_mask->sin6.sin6_family = AF_INET6;
1070 soup->so_mask->sin6.sin6_len = sizeof(struct sockaddr_in6);
1071 memset(&soup->so_mask->sin6.sin6_addr, 0,
1072 sizeof(soup->so_mask->sin6.sin6_addr));
1073 if (q > 0)
1074 memset(&soup->so_mask->sin6.sin6_addr, 0xff, q);
1075 if (r > 0)
1076 *((u_char *)&soup->so_mask->sin6.sin6_addr + q) =
1077 (0xff00 >> r) & 0xff;
1078 break;
1079 #endif
1080 }
1081 return len == max;
1082 }
1083
1084 #ifndef SMALL
1085 static void
interfaces(void)1086 interfaces(void)
1087 {
1088 size_t needed;
1089 int mib[6];
1090 char *buf, *lim, *next;
1091 struct rt_msghdr *rtm;
1092
1093 mib[0] = CTL_NET;
1094 mib[1] = PF_ROUTE;
1095 mib[2] = 0; /* protocol */
1096 mib[3] = 0; /* wildcard address family */
1097 mib[4] = NET_RT_IFLIST;
1098 mib[5] = 0; /* no flags */
1099 if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1100 err(EXIT_FAILURE, "route-sysctl-estimate");
1101 if (needed) {
1102 if ((buf = malloc(needed)) == NULL)
1103 err(EXIT_FAILURE, "malloc");
1104 if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
1105 err(EXIT_FAILURE,
1106 "actual retrieval of interface table");
1107 }
1108 lim = buf + needed;
1109 for (next = buf; next < lim; next += rtm->rtm_msglen) {
1110 rtm = (struct rt_msghdr *)next;
1111 print_rtmsg(rtm, rtm->rtm_msglen);
1112 }
1113 free(buf);
1114 }
1115 }
1116
1117 static void
monitor(int argc,char * const * argv)1118 monitor(int argc, char * const *argv)
1119 {
1120 int i, n;
1121 union {
1122 char msg[2048];
1123 struct rt_msghdr hdr;
1124 } u;
1125 int count = 0;
1126
1127 /* usage: route monitor [-c <count>] */
1128
1129 /* eat "monitor" */
1130 argc -= 1;
1131 argv += 1;
1132
1133 /* parse [-c <count>] */
1134 if (argc > 0) {
1135 if (argc != 2)
1136 usage(argv[0]);
1137 if (strcmp(argv[0], "-c") != 0)
1138 usage(argv[0]);
1139
1140 count = atoi(argv[1]);
1141 }
1142
1143 verbose = 1;
1144 if (debugonly) {
1145 interfaces();
1146 exit(0);
1147 }
1148 for(i = 0; count == 0 || i < count; i++) {
1149 time_t now;
1150 n = prog_read(sock, &u, sizeof(u));
1151 if (n == -1) {
1152 warn("read");
1153 continue;
1154 }
1155 now = time(NULL);
1156 (void)printf("got message of size %d on %s", n, ctime(&now));
1157 print_rtmsg(&u.hdr, n);
1158 }
1159 }
1160
1161 #endif /* SMALL */
1162
1163
1164 struct {
1165 struct rt_msghdr m_rtm;
1166 char m_space[512];
1167 } m_rtmsg;
1168
1169 static int
rtmsg(int cmd,int flags,struct sou * soup)1170 rtmsg(int cmd, int flags, struct sou *soup)
1171 {
1172 static int seq;
1173 int rlen;
1174 char *cp = m_rtmsg.m_space;
1175 int l;
1176
1177 #define NEXTADDR(w, u) \
1178 if (rtm_addrs & (w)) {\
1179 l = RT_ROUNDUP(u->sa.sa_len); memmove(cp, u, l); cp += l;\
1180 if (verbose && ! shortoutput) sodump(u,#u);\
1181 }
1182
1183 errno = 0;
1184 memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1185 if (cmd == 'a')
1186 cmd = RTM_ADD;
1187 else if (cmd == 'c')
1188 cmd = RTM_CHANGE;
1189 else if (cmd == 'g') {
1190 #ifdef SMALL
1191 return -1;
1192 #else /* SMALL */
1193 cmd = RTM_GET;
1194 if (soup->so_ifp->sa.sa_family == AF_UNSPEC) {
1195 soup->so_ifp->sa.sa_family = AF_LINK;
1196 soup->so_ifp->sa.sa_len = sizeof(struct sockaddr_dl);
1197 rtm_addrs |= RTA_IFP;
1198 }
1199 #endif /* SMALL */
1200 } else
1201 cmd = RTM_DELETE;
1202 #define rtm m_rtmsg.m_rtm
1203 rtm.rtm_type = cmd;
1204 rtm.rtm_flags = flags;
1205 rtm.rtm_version = RTM_VERSION;
1206 rtm.rtm_seq = ++seq;
1207 rtm.rtm_addrs = rtm_addrs;
1208 rtm.rtm_rmx = rt_metrics;
1209 rtm.rtm_inits = rtm_inits;
1210
1211 if (rtm_addrs & RTA_NETMASK)
1212 mask_addr(soup);
1213 NEXTADDR(RTA_DST, soup->so_dst);
1214 NEXTADDR(RTA_GATEWAY, soup->so_gate);
1215 NEXTADDR(RTA_NETMASK, soup->so_mask);
1216 NEXTADDR(RTA_GENMASK, soup->so_genmask);
1217 NEXTADDR(RTA_IFP, soup->so_ifp);
1218 NEXTADDR(RTA_IFA, soup->so_ifa);
1219 #ifndef SMALL
1220 NEXTADDR(RTA_TAG, soup->so_mpls);
1221 #endif
1222 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1223 if (verbose && ! shortoutput) {
1224 if (rtm_addrs)
1225 putchar('\n');
1226 print_rtmsg(&rtm, l);
1227 }
1228 if (debugonly)
1229 return 0;
1230 do {
1231 rlen = prog_write(sock, (char *)&m_rtmsg, l);
1232 } while (rlen == -1 && errno == ENOBUFS);
1233 if (rlen == -1) {
1234 warnx("writing to routing socket: %s", route_strerror(errno));
1235 return -1;
1236 }
1237 if (rlen < l) {
1238 warnx("write to routing socket, got %d for rlen", rlen);
1239 return 1;
1240 }
1241 #ifndef SMALL
1242 if (cmd == RTM_GET) {
1243 do {
1244 l = prog_read(sock,
1245 (char *)&m_rtmsg, sizeof(m_rtmsg));
1246 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1247 if (l < 0)
1248 err(EXIT_FAILURE, "read from routing socket");
1249 else
1250 return print_getmsg(&rtm, l, soup);
1251 }
1252 #endif /* SMALL */
1253 #undef rtm
1254 return 0;
1255 }
1256
1257 static void
mask_addr(struct sou * soup)1258 mask_addr(struct sou *soup)
1259 {
1260 int olen = soup->so_mask->sa.sa_len;
1261 char *cp1 = olen + (char *)soup->so_mask, *cp2;
1262
1263 for (soup->so_mask->sa.sa_len = 0; cp1 > (char *)soup->so_mask; )
1264 if (*--cp1 != 0) {
1265 soup->so_mask->sa.sa_len = 1 + cp1 - (char *)soup->so_mask;
1266 break;
1267 }
1268 if ((rtm_addrs & RTA_DST) == 0)
1269 return;
1270 switch (soup->so_dst->sa.sa_family) {
1271 case AF_INET:
1272 #ifdef INET6
1273 case AF_INET6:
1274 #endif
1275 #ifndef SMALL
1276 case AF_APPLETALK:
1277 #endif /* SMALL */
1278 case 0:
1279 return;
1280 }
1281 cp1 = soup->so_mask->sa.sa_len + 1 + (char *)soup->so_dst;
1282 cp2 = soup->so_dst->sa.sa_len + 1 + (char *)soup->so_dst;
1283 while (cp2 > cp1)
1284 *--cp2 = 0;
1285 cp2 = soup->so_mask->sa.sa_len + 1 + (char *)soup->so_mask;
1286 while (cp1 > soup->so_dst->sa.sa_data)
1287 *--cp1 &= *--cp2;
1288 }
1289
1290 const char * const msgtypes[] = {
1291 [RTM_ADD] = "RTM_ADD: Add Route",
1292 [RTM_DELETE] = "RTM_DELETE: Delete Route",
1293 [RTM_CHANGE] = "RTM_CHANGE: Change Metrics, Flags or Gateway",
1294 [RTM_GET] = "RTM_GET: Report Metrics",
1295 [RTM_LOSING] = "RTM_LOSING: Kernel Suspects Partitioning",
1296 [RTM_REDIRECT] = "RTM_REDIRECT: Told to use different route",
1297 [RTM_MISS] = "RTM_MISS: Lookup failed on this address",
1298 [RTM_LOCK] = "RTM_LOCK: fix specified metrics",
1299 [RTM_OLDADD] = "RTM_OLDADD: caused by SIOCADDRT",
1300 [RTM_OLDDEL] = "RTM_OLDDEL: caused by SIOCDELRT",
1301 [RTM_NEWADDR] = "RTM_NEWADDR: address being added to iface",
1302 [RTM_DELADDR] = "RTM_DELADDR: address being removed from iface",
1303 [RTM_OOIFINFO] = "RTM_OOIFINFO: iface status change (pre-1.5)",
1304 [RTM_OIFINFO] = "RTM_OIFINFO: iface status change (pre-64bit time)",
1305 [RTM_IFANNOUNCE] = "RTM_IFANNOUNCE: iface arrival/departure",
1306 [RTM_IEEE80211] = "RTM_IEEE80211: IEEE80211 wireless event",
1307 [RTM_IFINFO] = "RTM_IFINFO: iface status change",
1308 [RTM_CHGADDR] = "RTM_CHGADDR: address being changed on iface",
1309 };
1310
1311 const char unknownflags[] = "\020";
1312 const char metricnames[] = RTVBITS;
1313 const char routeflags[] = RTFBITS;
1314 const char ifnetflags[] = IFFBITS;
1315 const char in_ifflags[] = IN_IFFBITS;
1316 const char in6_ifflags[] = IN6_IFFBITS;
1317 const char addrnames[] = RTABITS;
1318
1319
1320 #ifndef SMALL
1321 static const char *
linkstate(struct if_msghdr * ifm)1322 linkstate(struct if_msghdr *ifm)
1323 {
1324 static char buf[64];
1325
1326 switch (ifm->ifm_data.ifi_link_state) {
1327 case LINK_STATE_UNKNOWN:
1328 return "carrier: unknown";
1329 case LINK_STATE_DOWN:
1330 return "carrier: no carrier";
1331 case LINK_STATE_UP:
1332 return "carrier: active";
1333 default:
1334 (void)snprintf(buf, sizeof(buf), "carrier: 0x%x",
1335 ifm->ifm_data.ifi_link_state);
1336 return buf;
1337 }
1338 }
1339 #endif /* SMALL */
1340
1341 static void
print_rtmsg(struct rt_msghdr * rtm,int msglen)1342 print_rtmsg(struct rt_msghdr *rtm, int msglen)
1343 {
1344 struct if_msghdr *ifm;
1345 struct ifa_msghdr *ifam;
1346 struct if_announcemsghdr *ifan;
1347 union {
1348 struct ieee80211_join_event join;
1349 struct ieee80211_leave_event leave;
1350 struct ieee80211_replay_event replay;
1351 struct ieee80211_michael_event michael;
1352 } ev;
1353 size_t evlen = 0;
1354
1355 if (verbose == 0)
1356 return;
1357 if (rtm->rtm_version != RTM_VERSION) {
1358 (void)printf("routing message version %d not understood\n",
1359 rtm->rtm_version);
1360 return;
1361 }
1362 if (msgtypes[rtm->rtm_type])
1363 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1364 else
1365 (void)printf("#%d: ", rtm->rtm_type);
1366 (void)printf("len %d, ", rtm->rtm_msglen);
1367 switch (rtm->rtm_type) {
1368 case RTM_IFINFO:
1369 ifm = (struct if_msghdr *)rtm;
1370 (void)printf("if# %d, %s, flags: ", ifm->ifm_index,
1371 #ifdef SMALL
1372 ""
1373 #else
1374 linkstate(ifm)
1375 #endif /* SMALL */
1376 );
1377 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1378 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1379 break;
1380 case RTM_NEWADDR:
1381 case RTM_DELADDR:
1382 case RTM_CHGADDR:
1383 ifam = (struct ifa_msghdr *)rtm;
1384 (void)printf("pid %d, metric %d, addrflags: ",
1385 ifam->ifam_pid, ifam->ifam_metric);
1386 struct sockaddr *sa = (struct sockaddr *)(ifam + 1);
1387 const char *bits;
1388 switch (sa->sa_family) {
1389 case AF_INET:
1390 bits = in_ifflags;
1391 break;
1392 case AF_INET6:
1393 bits = in6_ifflags;
1394 break;
1395 default:
1396 bits = unknownflags;
1397 break;
1398 }
1399 bprintf(stdout, ifam->ifam_addrflags, bits);
1400 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1401 break;
1402 case RTM_IEEE80211:
1403 ifan = (struct if_announcemsghdr *)rtm;
1404 (void)printf("if# %d, what: ", ifan->ifan_index);
1405 switch (ifan->ifan_what) {
1406 case RTM_IEEE80211_ASSOC:
1407 printf("associate");
1408 break;
1409 case RTM_IEEE80211_REASSOC:
1410 printf("re-associate");
1411 break;
1412 case RTM_IEEE80211_DISASSOC:
1413 printf("disassociate");
1414 break;
1415 case RTM_IEEE80211_SCAN:
1416 printf("scan complete");
1417 break;
1418 case RTM_IEEE80211_JOIN:
1419 evlen = sizeof(ev.join);
1420 printf("join");
1421 break;
1422 case RTM_IEEE80211_LEAVE:
1423 evlen = sizeof(ev.leave);
1424 printf("leave");
1425 break;
1426 case RTM_IEEE80211_MICHAEL:
1427 evlen = sizeof(ev.michael);
1428 printf("michael");
1429 break;
1430 case RTM_IEEE80211_REPLAY:
1431 evlen = sizeof(ev.replay);
1432 printf("replay");
1433 break;
1434 default:
1435 evlen = 0;
1436 printf("#%d", ifan->ifan_what);
1437 break;
1438 }
1439 if (sizeof(*ifan) + evlen > ifan->ifan_msglen) {
1440 printf(" (truncated)\n");
1441 break;
1442 }
1443 (void)memcpy(&ev, (ifan + 1), evlen);
1444 switch (ifan->ifan_what) {
1445 case RTM_IEEE80211_JOIN:
1446 case RTM_IEEE80211_LEAVE:
1447 printf(" mac %" PRIETHER,
1448 PRIETHER_ARGS(ev.join.iev_addr));
1449 break;
1450 case RTM_IEEE80211_REPLAY:
1451 case RTM_IEEE80211_MICHAEL:
1452 printf(" src %" PRIETHER " dst %" PRIETHER
1453 " cipher %" PRIu8 " keyix %" PRIu8,
1454 PRIETHER_ARGS(ev.replay.iev_src),
1455 PRIETHER_ARGS(ev.replay.iev_dst),
1456 ev.replay.iev_cipher,
1457 ev.replay.iev_keyix);
1458 if (ifan->ifan_what == RTM_IEEE80211_REPLAY) {
1459 printf(" key rsc %#" PRIx64
1460 " frame rsc %#" PRIx64,
1461 ev.replay.iev_keyrsc, ev.replay.iev_rsc);
1462 }
1463 break;
1464 default:
1465 break;
1466 }
1467 printf("\n");
1468 break;
1469 case RTM_IFANNOUNCE:
1470 ifan = (struct if_announcemsghdr *)rtm;
1471 (void)printf("if# %d, what: ", ifan->ifan_index);
1472 switch (ifan->ifan_what) {
1473 case IFAN_ARRIVAL:
1474 printf("arrival");
1475 break;
1476 case IFAN_DEPARTURE:
1477 printf("departure");
1478 break;
1479 default:
1480 printf("#%d", ifan->ifan_what);
1481 break;
1482 }
1483 printf("\n");
1484 break;
1485 case RTM_ADD: /* FALLTHROUGH */
1486 case RTM_CHANGE: /* FALLTHROUGH */
1487 case RTM_DELETE: /* FALLTHROUGH */
1488 case RTM_GET: /* FALLTHROUGH */
1489 case RTM_LOSING: /* FALLTHROUGH */
1490 case RTM_MISS:
1491 (void)printf("pid %d, seq %d, errno %d, flags: ",
1492 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1493 bprintf(stdout, rtm->rtm_flags, routeflags);
1494 pmsg_common(rtm);
1495 break;
1496 }
1497 }
1498
1499 #ifndef SMALL
1500 static int
print_getmsg(struct rt_msghdr * rtm,int msglen,struct sou * soup)1501 print_getmsg(struct rt_msghdr *rtm, int msglen, struct sou *soup)
1502 {
1503 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL, *mpls = NULL;
1504 struct sockaddr_dl *ifp = NULL;
1505 struct sockaddr *sa;
1506 char *cp;
1507 unsigned int i;
1508
1509 if (! shortoutput) {
1510 (void)printf(" route to: %s\n",
1511 routename(&soup->so_dst->sa, nflag));
1512 }
1513 if (rtm->rtm_version != RTM_VERSION) {
1514 warnx("routing message version %d not understood",
1515 rtm->rtm_version);
1516 return 1;
1517 }
1518 if (rtm->rtm_msglen > msglen) {
1519 warnx("message length mismatch, in packet %d, returned %d",
1520 rtm->rtm_msglen, msglen);
1521 }
1522 if (rtm->rtm_errno) {
1523 warnx("RTM_GET: %s (errno %d)",
1524 strerror(rtm->rtm_errno), rtm->rtm_errno);
1525 return 1;
1526 }
1527 cp = ((char *)(rtm + 1));
1528 if (rtm->rtm_addrs)
1529 for (i = 1; i; i <<= 1)
1530 if (i & rtm->rtm_addrs) {
1531 sa = (struct sockaddr *)cp;
1532 switch (i) {
1533 case RTA_DST:
1534 dst = sa;
1535 break;
1536 case RTA_GATEWAY:
1537 gate = sa;
1538 break;
1539 case RTA_NETMASK:
1540 mask = sa;
1541 break;
1542 case RTA_IFP:
1543 if (sa->sa_family == AF_LINK &&
1544 ((struct sockaddr_dl *)sa)->sdl_nlen)
1545 ifp = (struct sockaddr_dl *)sa;
1546 break;
1547 case RTA_IFA:
1548 ifa = sa;
1549 break;
1550 case RTA_TAG:
1551 mpls = sa;
1552 break;
1553 }
1554 RT_ADVANCE(cp, sa);
1555 }
1556 if (dst && mask)
1557 mask->sa_family = dst->sa_family; /* XXX */
1558 if (dst && ! shortoutput)
1559 (void)printf("destination: %s\n",
1560 routename(dst, nflag));
1561 if (mask && ! shortoutput) {
1562 int savenflag = nflag;
1563
1564 nflag = RT_NFLAG;
1565 (void)printf(" mask: %s\n",
1566 routename(mask, nflag));
1567 nflag = savenflag;
1568 }
1569 if (gate && rtm->rtm_flags & RTF_GATEWAY) {
1570 const char *name;
1571
1572 name = routename(gate, nflag);
1573 if (shortoutput) {
1574 if (*name == '\0')
1575 return 1;
1576 (void)printf("%s\n", name);
1577 } else
1578 (void)printf(" gateway: %s\n", name);
1579 }
1580 if (mpls) {
1581 const char *name;
1582 name = routename(mpls, nflag);
1583 if(shortoutput) {
1584 if (*name == '\0')
1585 return 1;
1586 printf("%s\n", name);
1587 } else
1588 printf(" Tag: %s\n", name);
1589 }
1590
1591 if (ifa && ! shortoutput)
1592 (void)printf(" local addr: %s\n",
1593 routename(ifa, nflag));
1594 if (ifp && ! shortoutput)
1595 (void)printf(" interface: %.*s\n",
1596 ifp->sdl_nlen, ifp->sdl_data);
1597 if (! shortoutput) {
1598 (void)printf(" flags: ");
1599 bprintf(stdout, rtm->rtm_flags, routeflags);
1600 }
1601
1602 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1603 #define msec(u) (((u) + 500) / 1000) /* usec to msec */
1604
1605 if (! shortoutput) {
1606 (void)printf("\n%s\n", "\
1607 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire");
1608 printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1609 printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1610 printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1611 printf("%8"PRId64"%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1612 printf("%8"PRId64"%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1613 printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1614 printf("%8"PRId64"%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1615 if (rtm->rtm_rmx.rmx_expire)
1616 rtm->rtm_rmx.rmx_expire -= time(0);
1617 printf("%8"PRId64"%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1618 }
1619 #undef lock
1620 #undef msec
1621 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1622
1623 if (shortoutput)
1624 return (rtm->rtm_addrs & RTF_GATEWAY) == 0;
1625 else if (verbose)
1626 pmsg_common(rtm);
1627 else if (rtm->rtm_addrs &~ RTA_IGN) {
1628 (void)printf("sockaddrs: ");
1629 bprintf(stdout, rtm->rtm_addrs, addrnames);
1630 putchar('\n');
1631 }
1632 return 0;
1633 #undef RTA_IGN
1634 }
1635 #endif /* SMALL */
1636
1637 void
pmsg_common(struct rt_msghdr * rtm)1638 pmsg_common(struct rt_msghdr *rtm)
1639 {
1640 (void)printf("\nlocks: ");
1641 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1642 (void)printf(" inits: ");
1643 bprintf(stdout, rtm->rtm_inits, metricnames);
1644 pmsg_addrs((char *)(rtm + 1), rtm->rtm_addrs);
1645 }
1646
1647 static void
extract_addrs(const char * cp,int addrs,const struct sockaddr * sa[],int * nmfp)1648 extract_addrs(const char *cp, int addrs, const struct sockaddr *sa[], int *nmfp)
1649 {
1650 int i, nmf = -1;
1651
1652 for (i = 0; i < RTAX_MAX; i++) {
1653 if ((1 << i) & addrs) {
1654 sa[i] = (const struct sockaddr *)cp;
1655 if ((i == RTAX_DST || i == RTAX_IFA) &&
1656 nmf == -1)
1657 nmf = sa[i]->sa_family;
1658 RT_ADVANCE(cp, sa[i]);
1659 } else
1660 sa[i] = NULL;
1661 }
1662
1663 if (nmfp != NULL)
1664 *nmfp = nmf;
1665 }
1666
1667 static void
pmsg_addrs(const char * cp,int addrs)1668 pmsg_addrs(const char *cp, int addrs)
1669 {
1670 const struct sockaddr *sa[RTAX_MAX];
1671 int i, nmf;
1672
1673 if (addrs != 0) {
1674 (void)printf("\nsockaddrs: ");
1675 bprintf(stdout, addrs, addrnames);
1676 (void)putchar('\n');
1677 extract_addrs(cp, addrs, sa, &nmf);
1678 for (i = 0; i < RTAX_MAX; i++) {
1679 if (sa[i] == NULL)
1680 continue;
1681
1682 if (i == RTAX_NETMASK && sa[i]->sa_len)
1683 (void)printf(" %s",
1684 netmask_string(sa[i], -1, nmf));
1685 else
1686 (void)printf(" %s",
1687 routename(sa[i], nflag));
1688 }
1689 }
1690 (void)putchar('\n');
1691 (void)fflush(stdout);
1692 }
1693
1694 static void
bprintf(FILE * fp,int b,const char * f)1695 bprintf(FILE *fp, int b, const char *f)
1696 {
1697 char buf[1024];
1698
1699 snprintb(buf, sizeof(buf), f, b);
1700 fputs(buf, fp);
1701 }
1702
1703 int
keyword(const char * cp)1704 keyword(const char *cp)
1705 {
1706 struct keytab *kt = keywords;
1707
1708 while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1709 kt++;
1710 return kt->kt_i;
1711 }
1712
1713 static void
sodump(sup su,const char * which)1714 sodump(sup su, const char *which)
1715 {
1716 #ifdef INET6
1717 char ntop_buf[NI_MAXHOST];
1718 #endif
1719
1720 switch (su->sa.sa_family) {
1721 case AF_INET:
1722 (void)printf("%s: inet %s; ",
1723 which, inet_ntoa(su->sin.sin_addr));
1724 break;
1725 #ifndef SMALL
1726 case AF_APPLETALK:
1727 (void)printf("%s: atalk %d.%d; ",
1728 which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node);
1729 break;
1730 #endif
1731 case AF_LINK:
1732 (void)printf("%s: link %s; ",
1733 which, link_ntoa(&su->sdl));
1734 break;
1735 #ifdef INET6
1736 case AF_INET6:
1737 (void)printf("%s: inet6 %s; ",
1738 which, inet_ntop(AF_INET6, &su->sin6.sin6_addr,
1739 ntop_buf, sizeof(ntop_buf)));
1740 break;
1741 #endif
1742 #ifndef SMALL
1743 case AF_MPLS:
1744 {
1745 union mpls_shim ms;
1746 const union mpls_shim *pms;
1747 int psize = sizeof(struct sockaddr_mpls);
1748
1749 ms.s_addr = ntohl(su->smpls.smpls_addr.s_addr);
1750 printf("%s: mpls %u; ",
1751 which, ms.shim.label);
1752
1753 pms = &su->smpls.smpls_addr;
1754 while(psize < su->smpls.smpls_len) {
1755 pms++;
1756 ms.s_addr = ntohl(pms->s_addr);
1757 printf("%u; ", ms.shim.label);
1758 psize += sizeof(ms);
1759 }
1760 break;
1761 }
1762 #endif /* SMALL */
1763 default:
1764 (void)printf("%s: (%d) %s; ",
1765 which, su->sa.sa_family, any_ntoa(&su->sa));
1766 }
1767 (void)fflush(stdout);
1768 }
1769
1770 /* States*/
1771 #define VIRGIN 0
1772 #define GOTONE 1
1773 #define GOTTWO 2
1774 /* Inputs */
1775 #define DIGIT (4*0)
1776 #define END (4*1)
1777 #define DELIM (4*2)
1778
1779 static void
sockaddr(const char * addr,struct sockaddr * sa)1780 sockaddr(const char *addr, struct sockaddr *sa)
1781 {
1782 char *cp = (char *)sa;
1783 int size = sa->sa_len;
1784 char *cplim = cp + size;
1785 int byte = 0, state = VIRGIN, new = 0;
1786
1787 (void)memset(cp, 0, size);
1788 cp++;
1789 do {
1790 if ((*addr >= '0') && (*addr <= '9')) {
1791 new = *addr - '0';
1792 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1793 new = *addr - 'a' + 10;
1794 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1795 new = *addr - 'A' + 10;
1796 } else if (*addr == 0)
1797 state |= END;
1798 else
1799 state |= DELIM;
1800 addr++;
1801 switch (state /* | INPUT */) {
1802 case GOTTWO | DIGIT:
1803 *cp++ = byte; /*FALLTHROUGH*/
1804 case VIRGIN | DIGIT:
1805 state = GOTONE; byte = new; continue;
1806 case GOTONE | DIGIT:
1807 state = GOTTWO; byte = new + (byte << 4); continue;
1808 default: /* | DELIM */
1809 state = VIRGIN; *cp++ = byte; byte = 0; continue;
1810 case GOTONE | END:
1811 case GOTTWO | END:
1812 *cp++ = byte; /* FALLTHROUGH */
1813 case VIRGIN | END:
1814 break;
1815 }
1816 break;
1817 } while (cp < cplim);
1818 sa->sa_len = cp - (char *)sa;
1819 }
1820