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Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[dragonfly.git] / sbin / route / route.c
blob80552be6f133b5f76c89ced0a8de0fd1af72920c
1 /*
2 * Copyright (c) 1983, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#) Copyright (c) 1983, 1989, 1991, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)route.c 8.6 (Berkeley) 4/28/95
35 * $FreeBSD: src/sbin/route/route.c,v 1.40.2.11 2003/02/27 23:10:10 ru Exp $
36 * $DragonFly: src/sbin/route/route.c,v 1.17 2008/07/07 22:02:09 nant Exp $
37 */
38
39 #include <sys/param.h>
40 #include <sys/file.h>
41 #include <sys/socket.h>
42 #include <sys/ioctl.h>
43 #include <sys/sysctl.h>
44 #include <sys/types.h>
45
46 #include <net/if.h>
47 #include <net/route.h>
48 #include <net/if_dl.h>
49 #include <netinet/in.h>
50 #include <netinet/if_ether.h>
51 #include <netatalk/at.h>
52 #ifdef NS
53 #include <netns/ns.h>
54 #endif
55 #include <arpa/inet.h>
56 #include <netdb.h>
57
58 #include <netproto/mpls/mpls.h>
59
60 #include <ctype.h>
61 #include <err.h>
62 #include <errno.h>
63 #include <paths.h>
64 #include <stdio.h>
65 #include <stdlib.h>
66 #include <string.h>
67 #include <sysexits.h>
68 #include <unistd.h>
69 #include <ifaddrs.h>
70
71 #include "extern.h"
72 #include "keywords.h"
73
74 union sockunion {
75 struct sockaddr sa;
76 struct sockaddr_in sin;
77 #ifdef INET6
78 struct sockaddr_in6 sin6;
79 #endif
80 struct sockaddr_at sat;
81 #ifdef NS
82 struct sockaddr_ns sns;
83 #endif
84 struct sockaddr_mpls smpls;
85 struct sockaddr_dl sdl;
86 struct sockaddr_inarp sinarp;
87 struct sockaddr_storage ss; /* added to avoid memory overrun */
88 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp, so_mpls1,
89 so_mpls2, so_mpls3;
90
91 typedef union sockunion *sup;
92
93 int nflag, wflag;
94 int cpuflag = -1;
95
96 static struct ortentry route;
97 static struct rt_metrics rt_metrics;
98 static int pid, rtm_addrs;
99 static int s;
100 static int forcehost, forcenet, af, qflag, tflag;
101 static int iflag, verbose, aflen = sizeof(struct sockaddr_in);
102 static int locking, lockrest, debugonly;
103 static int mplsop, popcount, pushcount, swapcount;
104 static u_long rtm_inits;
105 static uid_t uid;
106 #ifdef NS
107 static short ns_bh[] = {-1,-1,-1};
108 #endif
109
110 static int atalk_aton(const char *, struct at_addr *);
111 static char *atalk_ntoa(struct at_addr);
112 static void flushroutes(int, char **);
113 static void set_metric(char *, int);
114 static void newroute(int, char **);
115 static void inet_makenetandmask(u_long, struct sockaddr_in *, u_long);
116 static void interfaces(void);
117 static void monitor(void);
118 static void sockaddr(char *, struct sockaddr *);
119 static void sodump(sup, const char *);
120 static void bprintf(FILE *, int, u_char *);
121 static void print_getmsg(struct rt_msghdr *, int);
122 static void print_rtmsg(struct rt_msghdr *, int);
123 static void pmsg_common(struct rt_msghdr *);
124 static void pmsg_addrs(char *, int);
125 static void mask_addr(void);
126 static int getaddr(int, char *, struct hostent **);
127 static int rtmsg(int, int);
128 static int prefixlen(const char *);
129 #ifdef INET6
130 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *);
131 #endif
132
133 void
134 usage(const char *cp)
135 {
136 if (cp != NULL)
137 warnx("bad keyword: %s", cp);
138 fprintf(stderr, "usage: route [-dnqtv] command [[modifiers] args]\n");
139 exit(EX_USAGE);
140 /* NOTREACHED */
141 }
142
143 #define ROUNDUP(a) \
144 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
145 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
146
147 int
148 main(int argc, char **argv)
149 {
150 int ch;
151
152 if (argc < 2)
153 usage((char *)NULL);
154
155 while ((ch = getopt(argc, argv, "c:wnqdtv")) != -1)
156 switch(ch) {
157 case 'c':
158 cpuflag = strtol(optarg, NULL, 0);
159 break;
160 case 'w':
161 wflag = 1;
162 break;
163 case 'n':
164 nflag = 1;
165 break;
166 case 'q':
167 qflag = 1;
168 break;
169 case 'v':
170 verbose = 1;
171 break;
172 case 't':
173 tflag = 1;
174 break;
175 case 'd':
176 debugonly = 1;
177 break;
178 case '?':
179 default:
180 usage((char *)NULL);
181 }
182 argc -= optind;
183 argv += optind;
184
185 pid = getpid();
186 uid = geteuid();
187 if (tflag)
188 s = open(_PATH_DEVNULL, O_WRONLY, 0);
189 else
190 s = socket(PF_ROUTE, SOCK_RAW, 0);
191 if (s < 0)
192 err(EX_OSERR, "socket");
193 if (*argv != NULL)
194 switch (keyword(*argv)) {
195 case K_GET:
196 uid = 0;
197 /* FALLTHROUGH */
198
199 case K_CHANGE:
200 case K_ADD:
201 case K_DELETE:
202 newroute(argc, argv);
203 /* NOTREACHED */
204
205 case K_SHOW:
206 show(argc, argv);
207 return(0);
208
209 case K_MONITOR:
210 monitor();
211 /* NOTREACHED */
212
213 case K_FLUSH:
214 flushroutes(argc, argv);
215 exit(0);
216 /* NOTREACHED */
217 }
218 usage(*argv);
219 /* NOTREACHED */
220 }
221
222 /*
223 * Purge all entries in the routing tables not
224 * associated with network interfaces.
225 */
226 static void
227 flushroutes(int argc, char **argv)
228 {
229 size_t needed;
230 int mib[7], rlen, seqno;
231 int miblen;
232 char *buf, *next, *lim;
233 struct rt_msghdr *rtm;
234
235 if (uid != 0) {
236 errx(EX_NOPERM, "must be root to alter routing table");
237 }
238 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
239 if (argc > 1) {
240 argv++;
241 if (argc == 2 && **argv == '-')
242 switch (keyword(*argv + 1)) {
243 case K_INET:
244 af = AF_INET;
245 break;
246 #ifdef INET6
247 case K_INET6:
248 af = AF_INET6;
249 break;
250 #endif
251 case K_ATALK:
252 af = AF_APPLETALK;
253 break;
254 #ifdef NS
255 case K_XNS:
256 af = AF_NS;
257 break;
258 #endif
259 case K_LINK:
260 af = AF_LINK;
261 break;
262 case K_MPLS:
263 af = AF_MPLS;
264 break;
265 default:
266 goto bad;
267 } else
268 bad: usage(*argv);
269 }
270 mib[0] = CTL_NET;
271 mib[1] = PF_ROUTE;
272 mib[2] = 0; /* protocol */
273 mib[3] = 0; /* wildcard address family */
274 mib[4] = NET_RT_DUMP;
275 mib[5] = 0; /* no flags */
276 if (cpuflag >= 0) {
277 mib[6] = cpuflag;
278 miblen = 7;
279 } else {
280 miblen = 6;
281 }
282 if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0)
283 err(EX_OSERR, "route-sysctl-estimate");
284 if ((buf = malloc(needed)) == NULL)
285 errx(EX_OSERR, "malloc failed");
286 if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0)
287 err(EX_OSERR, "route-sysctl-get");
288 lim = buf + needed;
289 if (verbose)
290 printf("Examining routing table from sysctl\n");
291 seqno = 0; /* ??? */
292 for (next = buf; next < lim; next += rtm->rtm_msglen) {
293 rtm = (struct rt_msghdr *)next;
294 if (verbose)
295 print_rtmsg(rtm, rtm->rtm_msglen);
296 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
297 continue;
298 if (af != 0) {
299 struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
300
301 if (sa->sa_family != af)
302 continue;
303 }
304 if (debugonly)
305 continue;
306 rtm->rtm_type = RTM_DELETE;
307 rtm->rtm_seq = seqno;
308 rlen = write(s, next, rtm->rtm_msglen);
309 if (rlen < (int)rtm->rtm_msglen) {
310 warn("write to routing socket");
311 printf("got only %d for rlen\n", rlen);
312 break;
313 }
314 seqno++;
315 if (qflag)
316 continue;
317 if (verbose) {
318 print_rtmsg(rtm, rlen);
319 } else {
320 struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
321 if (wflag) {
322 printf("%-20s ", rtm->rtm_flags & RTF_HOST ?
323 routename(sa) : netname(sa));
324 } else {
325 printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
326 routename(sa) : netname(sa));
327 }
328 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) +
329 (char *)sa);
330 if (wflag) {
331 printf("%-20s ", routename(sa));
332 } else {
333 printf("%-20.20s ", routename(sa));
334 }
335 printf("done\n");
336 }
337 }
338 }
339
340 char *
341 routename(struct sockaddr *sa)
342 {
343 const char *cp;
344 static char line[MAXHOSTNAMELEN + 1];
345 struct hostent *hp;
346 static char domain[MAXHOSTNAMELEN + 1];
347 static int first = 1;
348
349 if (first) {
350 first = 0;
351 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
352 (cp = strchr(domain, '.'))) {
353 domain[MAXHOSTNAMELEN] = '\0';
354 strcpy(domain, cp + 1);
355 } else
356 domain[0] = 0;
357 }
358
359 if (sa->sa_len == 0)
360 strcpy(line, "default");
361 else switch (sa->sa_family) {
362
363 case AF_INET:
364 { struct in_addr in;
365 in = ((struct sockaddr_in *)sa)->sin_addr;
366
367 cp = NULL;
368 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
369 cp = "default";
370 if (cp == NULL && !nflag) {
371 hp = gethostbyaddr(&in, sizeof(struct in_addr),
372 AF_INET);
373 if (hp != NULL) {
374 char *cptr;
375 cptr = strchr(hp->h_name, '.');
376 if (cptr != NULL && !wflag &&
377 strcmp(cptr + 1, domain) == 0)
378 *cptr = '\0';
379 cp = hp->h_name;
380 }
381 }
382 if (cp != NULL) {
383 strncpy(line, cp, sizeof(line) - 1);
384 line[sizeof(line) - 1] = '\0';
385 } else
386 sprintf(line, "%s", inet_ntoa(in));
387 break;
388 }
389
390 #ifdef INET6
391 case AF_INET6:
392 {
393 struct sockaddr_in6 sin6; /* use static var for safety */
394 int niflags = 0;
395 #ifdef NI_WITHSCOPEID
396 niflags = NI_WITHSCOPEID;
397 #endif
398
399 memset(&sin6, 0, sizeof(sin6));
400 memcpy(&sin6, sa, sa->sa_len);
401 sin6.sin6_len = sizeof(struct sockaddr_in6);
402 sin6.sin6_family = AF_INET6;
403 #ifdef __KAME__
404 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
405 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
406 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
407 sin6.sin6_scope_id == 0) {
408 sin6.sin6_scope_id =
409 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
410 sin6.sin6_addr.s6_addr[2] = 0;
411 sin6.sin6_addr.s6_addr[3] = 0;
412 }
413 #endif
414 if (nflag)
415 niflags |= NI_NUMERICHOST;
416 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
417 line, sizeof(line), NULL, 0, niflags) != 0)
418 strncpy(line, "invalid", sizeof(line));
419
420 return(line);
421 }
422 #endif
423
424 case AF_APPLETALK:
425 snprintf(line, sizeof(line), "atalk %s",
426 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
427 break;
428
429 #ifdef NS
430 case AF_NS:
431 return(ns_print((struct sockaddr_ns *)sa));
432 #endif
433
434 case AF_LINK:
435 return(link_ntoa((struct sockaddr_dl *)sa));
436
437 default:
438 {
439 /*
440 * Unknown address family; just render the raw
441 * data in sa->sa_data as hex values.
442 */
443 uint8_t *sp = (uint8_t *)sa->sa_data;
444 uint8_t *splim = (uint8_t *)sa + sa->sa_len;
445 char *cps = line + sprintf(line, "(%d)", sa->sa_family);
446 char *cpe = line + sizeof(line);
447
448 while (sp < splim && cps < cpe)
449 cps += snprintf(cps, cpe - cps, " %02x", *sp++);
450 break;
451 }
452 }
453 return(line);
454 }
455
456 /*
457 * Return the name of the network whose address is given.
458 * The address is assumed to be that of a net or subnet, not a host.
459 */
460 char *
461 netname(struct sockaddr *sa)
462 {
463 const char *cp = 0;
464 static char line[MAXHOSTNAMELEN + 1];
465 struct netent *np = 0;
466 u_long net, mask;
467 u_long i;
468 int subnetshift;
469
470 switch (sa->sa_family) {
471
472 case AF_INET:
473 { struct in_addr in;
474 in = ((struct sockaddr_in *)sa)->sin_addr;
475
476 i = in.s_addr = ntohl(in.s_addr);
477 if (in.s_addr == 0)
478 cp = "default";
479 else if (!nflag) {
480 if (IN_CLASSA(i)) {
481 mask = IN_CLASSA_NET;
482 subnetshift = 8;
483 } else if (IN_CLASSB(i)) {
484 mask = IN_CLASSB_NET;
485 subnetshift = 8;
486 } else {
487 mask = IN_CLASSC_NET;
488 subnetshift = 4;
489 }
490 /*
491 * If there are more bits than the standard mask
492 * would suggest, subnets must be in use.
493 * Guess at the subnet mask, assuming reasonable
494 * width subnet fields.
495 */
496 while (in.s_addr &~ mask)
497 mask = (long)mask >> subnetshift;
498 net = in.s_addr & mask;
499 while ((mask & 1) == 0)
500 mask >>= 1, net >>= 1;
501 np = getnetbyaddr(net, AF_INET);
502 if (np != NULL)
503 cp = np->n_name;
504 }
505 #define C(x) (unsigned)((x) & 0xff)
506 if (cp != NULL)
507 strncpy(line, cp, sizeof(line));
508 else if ((in.s_addr & 0xffffff) == 0)
509 sprintf(line, "%u", C(in.s_addr >> 24));
510 else if ((in.s_addr & 0xffff) == 0)
511 sprintf(line, "%u.%u", C(in.s_addr >> 24),
512 C(in.s_addr >> 16));
513 else if ((in.s_addr & 0xff) == 0)
514 sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
515 C(in.s_addr >> 16), C(in.s_addr >> 8));
516 else
517 sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
518 C(in.s_addr >> 16), C(in.s_addr >> 8),
519 C(in.s_addr));
520 #undef C
521 break;
522 }
523
524 #ifdef INET6
525 case AF_INET6:
526 {
527 struct sockaddr_in6 sin6; /* use static var for safety */
528 int niflags = 0;
529 #ifdef NI_WITHSCOPEID
530 niflags = NI_WITHSCOPEID;
531 #endif
532
533 memset(&sin6, 0, sizeof(sin6));
534 memcpy(&sin6, sa, sa->sa_len);
535 sin6.sin6_len = sizeof(struct sockaddr_in6);
536 sin6.sin6_family = AF_INET6;
537 #ifdef __KAME__
538 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
539 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
540 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
541 sin6.sin6_scope_id == 0) {
542 sin6.sin6_scope_id =
543 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
544 sin6.sin6_addr.s6_addr[2] = 0;
545 sin6.sin6_addr.s6_addr[3] = 0;
546 }
547 #endif
548 if (nflag)
549 niflags |= NI_NUMERICHOST;
550 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
551 line, sizeof(line), NULL, 0, niflags) != 0)
552 strncpy(line, "invalid", sizeof(line));
553
554 return(line);
555 }
556 #endif
557
558 case AF_APPLETALK:
559 snprintf(line, sizeof(line), "atalk %s",
560 atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
561 break;
562
563 #ifdef NS
564 case AF_NS:
565 return(ns_print((struct sockaddr_ns *)sa));
566 break;
567 #endif
568
569 case AF_LINK:
570 return(link_ntoa((struct sockaddr_dl *)sa));
571
572
573 default:
574 {
575 /*
576 * Unknown address family; just render the raw
577 * data in sa->sa_data as hex values.
578 */
579 uint8_t *sp = (uint8_t *)sa->sa_data;
580 uint8_t *splim = (uint8_t *)sa + sa->sa_len;
581 char *cps = line + sprintf(line, "af %d:", sa->sa_family);
582 char *cpe = line + sizeof(line);
583
584 while (sp < splim && cps < cpe)
585 cps += snprintf(cps, cpe - cps, " %02x", *sp++);
586 break;
587 }
588 }
589 return(line);
590 }
591
592 static void
593 set_metric(char *value, int key)
594 {
595 int flag = 0;
596 u_long noval, *valp = &noval;
597
598 switch (key) {
599 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
600 caseof(K_MTU, RTV_MTU, rmx_mtu);
601 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
602 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
603 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
604 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
605 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
606 caseof(K_RTT, RTV_RTT, rmx_rtt);
607 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
608 }
609 rtm_inits |= flag;
610 if (lockrest || locking)
611 rt_metrics.rmx_locks |= flag;
612 if (locking)
613 locking = 0;
614 *valp = atoi(value);
615 }
616
617 static void
618 newroute(int argc, char **argv)
619 {
620 char *cmd;
621 const char *err_str, *dest = "", *gateway = "";
622 int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
623 int key;
624 struct hostent *hp = 0;
625
626 if (uid != 0) {
627 errx(EX_NOPERM, "must be root to alter routing table");
628 }
629 cmd = argv[0];
630 if (*cmd != 'g')
631 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
632 while (--argc > 0) {
633 if (**(++argv)== '-') {
634 switch (key = keyword(1 + *argv)) {
635 case K_LINK:
636 af = AF_LINK;
637 aflen = sizeof(struct sockaddr_dl);
638 break;
639 case K_INET:
640 af = AF_INET;
641 aflen = sizeof(struct sockaddr_in);
642 break;
643 #ifdef INET6
644 case K_INET6:
645 af = AF_INET6;
646 aflen = sizeof(struct sockaddr_in6);
647 break;
648 #endif
649 case K_ATALK:
650 af = AF_APPLETALK;
651 aflen = sizeof(struct sockaddr_at);
652 break;
653 case K_SA:
654 af = PF_ROUTE;
655 aflen = sizeof(union sockunion);
656 break;
657 #ifdef NS
658 case K_XNS:
659 af = AF_NS;
660 aflen = sizeof(struct sockaddr_ns);
661 break;
662 #endif
663 case K_IFACE:
664 case K_INTERFACE:
665 iflag++;
666 break;
667 case K_NOSTATIC:
668 flags &= ~RTF_STATIC;
669 break;
670 case K_LLINFO:
671 flags |= RTF_LLINFO;
672 break;
673 case K_LOCK:
674 locking = 1;
675 break;
676 case K_LOCKREST:
677 lockrest = 1;
678 break;
679 case K_HOST:
680 forcehost++;
681 break;
682 case K_REJECT:
683 flags |= RTF_REJECT;
684 break;
685 case K_BLACKHOLE:
686 flags |= RTF_BLACKHOLE;
687 break;
688 case K_PROTO1:
689 flags |= RTF_PROTO1;
690 break;
691 case K_PROTO2:
692 flags |= RTF_PROTO2;
693 break;
694 case K_PROXY:
695 proxy = 1;
696 break;
697 case K_CLONING:
698 flags |= RTF_CLONING;
699 break;
700 case K_XRESOLVE:
701 flags |= RTF_XRESOLVE;
702 break;
703 case K_STATIC:
704 flags |= RTF_STATIC;
705 break;
706 case K_IFA:
707 if (--argc == 0)
708 usage((char *)NULL);
709 getaddr(RTA_IFA, *++argv, 0);
710 break;
711 case K_IFP:
712 if (--argc == 0)
713 usage((char *)NULL);
714 getaddr(RTA_IFP, *++argv, 0);
715 break;
716 case K_GENMASK:
717 if (--argc == 0)
718 usage((char *)NULL);
719 getaddr(RTA_GENMASK, *++argv, 0);
720 break;
721 case K_GATEWAY:
722 if (--argc == 0)
723 usage((char *)NULL);
724 getaddr(RTA_GATEWAY, *++argv, 0);
725 break;
726 case K_DST:
727 if (--argc == 0)
728 usage((char *)NULL);
729 ishost = getaddr(RTA_DST, *++argv, &hp);
730 dest = *argv;
731 break;
732 case K_NETMASK:
733 if (--argc == 0)
734 usage((char *)NULL);
735 getaddr(RTA_NETMASK, *++argv, 0);
736 /* FALLTHROUGH */
737 case K_NET:
738 forcenet++;
739 break;
740 case K_PREFIXLEN:
741 if (--argc == 0)
742 usage((char *)NULL);
743 if (prefixlen(*++argv) == -1) {
744 forcenet = 0;
745 ishost = 1;
746 } else {
747 forcenet = 1;
748 ishost = 0;
749 }
750 break;
751 case K_MPLS:
752 af = AF_MPLS;
753 aflen = sizeof(struct sockaddr_mpls);
754 break;
755 case K_POP:
756 flags |= RTF_MPLSOPS;
757 af = AF_MPLS;
758 mplsop = MPLSLOP_POP;
759 switch(++popcount){
760 case 1:
761 getaddr(RTA_MPLS1, "", 0);
762 break;
763 case 2:
764 getaddr(RTA_MPLS2, "", 0);
765 break;
766 case 3:
767 getaddr(RTA_MPLS3, "", 0);
768 break;
769 }
770 break;
771 case K_PUSH:
772 case K_SWAP:
773 if (popcount > 0) {
774 warnx("Push or swap after pop. Ignoring.");
775 break;
776 }
777 if (key == K_PUSH) {
778 mplsop = MPLSLOP_PUSH;
779 ++pushcount;
780 } else {
781 if (pushcount > 0) {
782 warnx("Swap after push. Ignoring.");
783 break;
784 }
785 if (swapcount > 0) {
786 warnx("Too many swaps. Ignoring.");
787 break;
788 }
789 mplsop = MPLSLOP_SWAP;
790 ++swapcount;
791 }
792 flags |= RTF_MPLSOPS;
793 af = AF_MPLS;
794 aflen = sizeof(struct sockaddr_mpls);
795 if (--argc == 0)
796 usage((char *)NULL);
797 switch(pushcount + swapcount){
798 case 1:
799 getaddr(RTA_MPLS1, *++argv, 0);
800 break;
801 case 2:
802 getaddr(RTA_MPLS2, *++argv, 0);
803 break;
804 case 3:
805 getaddr(RTA_MPLS3, *++argv, 0);
806 break;
807 }
808 break;
809 case K_MTU:
810 case K_HOPCOUNT:
811 case K_EXPIRE:
812 case K_RECVPIPE:
813 case K_SENDPIPE:
814 case K_SSTHRESH:
815 case K_RTT:
816 case K_RTTVAR:
817 if (--argc == 0)
818 usage((char *)NULL);
819 set_metric(*++argv, key);
820 break;
821 default:
822 usage(1+*argv);
823 }
824 } else {
825 if ((rtm_addrs & RTA_DST) == 0) {
826 dest = *argv;
827 ishost = getaddr(RTA_DST, *argv, &hp);
828 } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
829 gateway = *argv;
830 getaddr(RTA_GATEWAY, *argv, &hp);
831 } else {
832 getaddr(RTA_NETMASK, *argv, 0);
833 forcenet = 1;
834 }
835 }
836 }
837 if (forcehost) {
838 ishost = 1;
839 #ifdef INET6
840 if (af == AF_INET6) {
841 rtm_addrs &= ~RTA_NETMASK;
842 memset((void *)&so_mask, 0, sizeof(so_mask));
843 }
844 #endif
845 }
846 if (forcenet)
847 ishost = 0;
848 flags |= RTF_UP;
849 if (ishost)
850 flags |= RTF_HOST;
851 if (iflag == 0)
852 flags |= RTF_GATEWAY;
853 if (proxy) {
854 so_dst.sinarp.sin_other = SIN_PROXY;
855 flags |= RTF_ANNOUNCE;
856 }
857 for (attempts = 1; ; attempts++) {
858 errno = 0;
859 if ((ret = rtmsg(*cmd, flags)) == 0)
860 break;
861 if (errno != ENETUNREACH && errno != ESRCH)
862 break;
863 if (af == AF_INET && *gateway != '\0' &&
864 hp != NULL && hp->h_addr_list[1] != NULL) {
865 hp->h_addr_list++;
866 memmove(&so_gate.sin.sin_addr,
867 hp->h_addr_list[0],
868 MIN((size_t)hp->h_length,
869 sizeof(so_gate.sin.sin_addr)));
870 } else
871 break;
872 }
873 if (*cmd == 'g')
874 exit(0);
875 if (!qflag) {
876 oerrno = errno;
877 printf("%s %s %s", cmd, ishost? "host" : "net", dest);
878 if (*gateway != '\0') {
879 printf(": gateway %s", gateway);
880 if (attempts > 1 && ret == 0 && af == AF_INET)
881 printf(" (%s)",
882 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
883 }
884 if (ret == 0) {
885 printf("\n");
886 } else {
887 switch (oerrno) {
888 case ESRCH:
889 err_str = "not in table";
890 break;
891 case EBUSY:
892 err_str = "entry in use";
893 break;
894 case ENOBUFS:
895 err_str = "routing table overflow";
896 break;
897 case EDQUOT: /* handle recursion avoidance in
898 rt_setgate() */
899 err_str = "gateway uses the same route";
900 break;
901 default:
902 err_str = strerror(oerrno);
903 break;
904 }
905 printf(": %s\n", err_str);
906 }
907 }
908 exit(ret != 0);
909 }
910
911 static void
912 inet_makenetandmask(u_long net, struct sockaddr_in *in, u_long bits)
913 {
914 u_long addr, mask = 0;
915 char *cp;
916
917 rtm_addrs |= RTA_NETMASK;
918 if (net <= 0xff)
919 addr = net << 24;
920 else if (net <= 0xffff)
921 addr = net << 16;
922 else if (net <= 0xffffff)
923 addr = net << 8;
924 else
925 addr = net;
926
927 if (bits)
928 mask = 0xffffffff << (32 - bits);
929 else {
930 if (IN_CLASSA(addr)) {
931 mask = IN_CLASSA_NET;
932 } else if (IN_CLASSB(addr)) {
933 mask = IN_CLASSB_NET;
934 } else if (IN_CLASSC(addr)) {
935 mask = IN_CLASSC_NET;
936 } else
937 mask = 0xffffffff;
938 }
939 in->sin_addr.s_addr = htonl(addr);
940 in = &so_mask.sin;
941 in->sin_addr.s_addr = htonl(mask);
942 in->sin_len = 0;
943 in->sin_family = 0;
944 cp = (char *)(&in->sin_addr + 1);
945 while (*--cp == 0 && cp > (char *)in)
946 ;
947 in->sin_len = 1 + cp - (char *)in;
948 }
949
950 #ifdef INET6
951 /*
952 * XXX the function may need more improvement...
953 */
954 static int
955 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
956 {
957 struct in6_addr in6;
958
959 if (plen == NULL) {
960 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
961 sin6->sin6_scope_id == 0) {
962 plen = "0";
963 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
964 /* aggregatable global unicast - RFC2374 */
965 memset(&in6, 0, sizeof(in6));
966 if (memcmp(&sin6->sin6_addr.s6_addr[8],
967 &in6.s6_addr[8], 8) == 0)
968 plen = "64";
969 }
970 }
971
972 if (plen == NULL || strcmp(plen, "128") == 0)
973 return(1);
974 rtm_addrs |= RTA_NETMASK;
975 prefixlen(plen);
976 return(0);
977 }
978 #endif
979
980 /*
981 * Interpret an argument as a network address of some kind,
982 * returning 1 if a host address, 0 if a network address.
983 */
984 static int
985 getaddr(int which, char *str, struct hostent **hpp)
986 {
987 sup su;
988 struct hostent *hp;
989 struct netent *np;
990 u_long val;
991 char *q;
992 int afamily; /* local copy of af so we can change it */
993
994 if (af == 0) {
995 af = AF_INET;
996 aflen = sizeof(struct sockaddr_in);
997 }
998 afamily = af;
999 rtm_addrs |= which;
1000 switch (which) {
1001 case RTA_DST:
1002 su = &so_dst;
1003 break;
1004 case RTA_GATEWAY:
1005 su = &so_gate;
1006 if (iflag) {
1007 struct ifaddrs *ifap, *ifa;
1008 struct sockaddr_dl *sdl = NULL;
1009
1010 if (getifaddrs(&ifap))
1011 err(1, "getifaddrs");
1012
1013 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
1014 if (ifa->ifa_addr->sa_family != AF_LINK)
1015 continue;
1016
1017 if (strcmp(str, ifa->ifa_name) != 0)
1018 continue;
1019
1020 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1021 }
1022 /* If we found it, then use it */
1023 if (sdl != NULL) {
1024 /*
1025 * Copy is safe since we have a
1026 * sockaddr_storage member in sockunion{}.
1027 * Note that we need to copy before calling
1028 * freeifaddrs().
1029 *
1030 * Interface routes are routed only by their
1031 * sdl_index or interface name (we provide
1032 * both here), not by the ARP address of the
1033 * local interface (alen, slen = 0).
1034 */
1035 memcpy(&su->sdl, sdl, sdl->sdl_len);
1036 su->sdl.sdl_alen = 0;
1037 su->sdl.sdl_slen = 0;
1038 }
1039 freeifaddrs(ifap);
1040 if (sdl != NULL)
1041 return(1);
1042 }
1043 break;
1044 case RTA_NETMASK:
1045 su = &so_mask;
1046 break;
1047 case RTA_GENMASK:
1048 su = &so_genmask;
1049 break;
1050 case RTA_IFP:
1051 su = &so_ifp;
1052 afamily = AF_LINK;
1053 break;
1054 case RTA_IFA:
1055 su = &so_ifa;
1056 break;
1057 case RTA_MPLS1:
1058 su = &so_mpls1;
1059 break;
1060 case RTA_MPLS2:
1061 su = &so_mpls2;
1062 break;
1063 case RTA_MPLS3:
1064 su = &so_mpls3;
1065 break;
1066 default:
1067 usage("internal error");
1068 /*NOTREACHED*/
1069 }
1070 su->sa.sa_len = aflen;
1071 su->sa.sa_family = afamily; /* cases that don't want it have left
1072 already */
1073 if (strcmp(str, "default") == 0) {
1074 /*
1075 * Default is net 0.0.0.0/0
1076 */
1077 switch (which) {
1078 case RTA_DST:
1079 forcenet++;
1080 /* bzero(su, sizeof(*su)); *//* for readability */
1081 getaddr(RTA_NETMASK, str, 0);
1082 break;
1083 case RTA_NETMASK:
1084 case RTA_GENMASK:
1085 /* bzero(su, sizeof(*su)); *//* for readability */
1086 break;
1087 }
1088 return(0);
1089 }
1090 switch (afamily) {
1091 #ifdef INET6
1092 case AF_INET6:
1093 {
1094 struct addrinfo hints, *res;
1095
1096 q = NULL;
1097 if (which == RTA_DST && (q = strchr(str, '/')) != NULL)
1098 *q = '\0';
1099 memset(&hints, 0, sizeof(hints));
1100 hints.ai_family = afamily; /*AF_INET6*/
1101 hints.ai_flags = AI_NUMERICHOST;
1102 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1103 if (getaddrinfo(str, "0", &hints, &res) != 0 ||
1104 res->ai_family != AF_INET6 ||
1105 res->ai_addrlen != sizeof(su->sin6)) {
1106 fprintf(stderr, "%s: bad value\n", str);
1107 exit(1);
1108 }
1109 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
1110 #ifdef __KAME__
1111 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
1112 IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) &&
1113 su->sin6.sin6_scope_id) {
1114 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1115 htons(su->sin6.sin6_scope_id);
1116 su->sin6.sin6_scope_id = 0;
1117 }
1118 #endif
1119 freeaddrinfo(res);
1120 if (q != NULL)
1121 *q++ = '/';
1122 if (which == RTA_DST)
1123 return(inet6_makenetandmask(&su->sin6, q));
1124 return(0);
1125 }
1126 #endif /* INET6 */
1127
1128 #ifdef NS
1129 case AF_NS:
1130 if (which == RTA_DST) {
1131 struct sockaddr_ns *sms = &(so_mask.sns);
1132 memset(sms, 0, sizeof(*sms));
1133 sms->sns_family = 0;
1134 sms->sns_len = 6;
1135 sms->sns_addr.x_net = *(union ns_net *)ns_bh;
1136 rtm_addrs |= RTA_NETMASK;
1137 }
1138 su->sns.sns_addr = ns_addr(str);
1139 return(!ns_nullhost(su->sns.sns_addr));
1140 #endif
1141
1142 case AF_APPLETALK:
1143 if (!atalk_aton(str, &su->sat.sat_addr))
1144 errx(EX_NOHOST, "bad address: %s", str);
1145 rtm_addrs |= RTA_NETMASK;
1146 return(forcehost || su->sat.sat_addr.s_node != 0);
1147
1148 case AF_LINK:
1149 link_addr(str, &su->sdl);
1150 return(1);
1151
1152 case PF_ROUTE:
1153 su->sa.sa_len = sizeof(*su);
1154 sockaddr(str, &su->sa);
1155 return(1);
1156
1157 case AF_MPLS:
1158 {
1159 mpls_label_t label;
1160
1161 bzero(su, sizeof(*su));
1162 su->sa.sa_len = sizeof(*su);
1163 su->sa.sa_family = AF_MPLS;
1164 su->smpls.smpls_op = mplsop;
1165 if (mplsop != MPLSLOP_POP && mplsop != MPLSLOP_POPALL &&
1166 *str != '\0') {
1167 if (sscanf(str, "%u", &label) != 1)
1168 errx(EX_NOHOST, "bad address: %s", str);
1169 su->smpls.smpls_label = htonl(label);
1170 }
1171 return(1);
1172 }
1173
1174 case AF_INET:
1175 default:
1176 break;
1177 }
1178
1179 if (hpp == NULL)
1180 hpp = &hp;
1181 *hpp = NULL;
1182
1183 q = strchr(str,'/');
1184 if (q != NULL && which == RTA_DST) {
1185 *q = '\0';
1186 if ((val = inet_network(str)) != INADDR_NONE) {
1187 inet_makenetandmask(
1188 val, &su->sin, strtoul(q+1, 0, 0));
1189 return(0);
1190 }
1191 *q = '/';
1192 }
1193 if ((which != RTA_DST || forcenet == 0) &&
1194 inet_aton(str, &su->sin.sin_addr)) {
1195 val = su->sin.sin_addr.s_addr;
1196 if (which != RTA_DST ||
1197 inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1198 return(1);
1199 else {
1200 val = ntohl(val);
1201 goto netdone;
1202 }
1203 }
1204 if (which == RTA_DST && forcehost == 0 &&
1205 ((val = inet_network(str)) != INADDR_NONE ||
1206 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) {
1207 netdone:
1208 inet_makenetandmask(val, &su->sin, 0);
1209 return(0);
1210 }
1211 hp = gethostbyname(str);
1212 if (hp != NULL) {
1213 *hpp = hp;
1214 su->sin.sin_family = hp->h_addrtype;
1215 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1216 MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr)));
1217 return(1);
1218 }
1219 errx(EX_NOHOST, "bad address: %s", str);
1220 }
1221
1222 static int
1223 prefixlen(const char *len_str)
1224 {
1225 int len = atoi(len_str), q, r;
1226 int max;
1227 char *p;
1228
1229 rtm_addrs |= RTA_NETMASK;
1230 switch (af) {
1231 #ifdef INET6
1232 case AF_INET6:
1233 max = 128;
1234 p = (char *)&so_mask.sin6.sin6_addr;
1235 break;
1236 #endif
1237 case AF_INET:
1238 max = 32;
1239 p = (char *)&so_mask.sin.sin_addr;
1240 break;
1241 default:
1242 fprintf(stderr, "prefixlen not supported in this af\n");
1243 exit(1);
1244 /*NOTREACHED*/
1245 }
1246
1247 if (len < 0 || max < len) {
1248 fprintf(stderr, "%s: bad value\n", len_str);
1249 exit(1);
1250 }
1251
1252 q = len >> 3;
1253 r = len & 7;
1254 so_mask.sa.sa_family = af;
1255 so_mask.sa.sa_len = aflen;
1256 memset((void *)p, 0, max / 8);
1257 if (q > 0)
1258 memset((void *)p, 0xff, q);
1259 if (r > 0)
1260 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1261 if (len == max)
1262 return(-1);
1263 else
1264 return(len);
1265 }
1266
1267 #ifdef NS
1268 short ns_nullh[] = {0,0,0};
1269
1270 char *
1271 ns_print(struct sockaddr_ns *sns)
1272 {
1273 struct ns_addr work;
1274 union { union ns_net net_e; u_long long_e; } net;
1275 u_short port;
1276 static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25];
1277 const char *host = "";
1278 char *p;
1279 u_char *q;
1280
1281 work = sns->sns_addr;
1282 port = ntohs(work.x_port);
1283 work.x_port = 0;
1284 net.net_e = work.x_net;
1285 if (ns_nullhost(work) && net.long_e == 0) {
1286 if (port == 0)
1287 strncpy(mybuf, "*.*", sizeof(mybuf));
1288 else
1289 sprintf(mybuf, "*.%XH", port);
1290 return(mybuf);
1291 }
1292
1293 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0)
1294 host = "any";
1295 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0)
1296 host = "*";
1297 else {
1298 q = work.x_host.c_host;
1299 sprintf(chost, "%02X%02X%02X%02X%02X%02XH",
1300 q[0], q[1], q[2], q[3], q[4], q[5]);
1301 for (p = chost; *p == '0' && p < chost + 12; p++)
1302 /* void */;
1303 host = p;
1304 }
1305 if (port != 0)
1306 sprintf(cport, ".%XH", htons(port));
1307 else
1308 *cport = 0;
1309
1310 snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s",
1311 (unsigned long)ntohl(net.long_e),
1312 host, cport);
1313 return(mybuf);
1314 }
1315 #endif
1316
1317 static void
1318 interfaces(void)
1319 {
1320 size_t needed;
1321 int mib[6];
1322 char *buf, *lim, *next;
1323 struct rt_msghdr *rtm;
1324
1325 mib[0] = CTL_NET;
1326 mib[1] = PF_ROUTE;
1327 mib[2] = 0; /* protocol */
1328 mib[3] = 0; /* wildcard address family */
1329 mib[4] = NET_RT_IFLIST;
1330 mib[5] = 0; /* no flags */
1331 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1332 err(EX_OSERR, "route-sysctl-estimate");
1333 if ((buf = malloc(needed)) == NULL)
1334 errx(EX_OSERR, "malloc failed");
1335 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1336 err(EX_OSERR, "actual retrieval of interface table");
1337 lim = buf + needed;
1338 for (next = buf; next < lim; next += rtm->rtm_msglen) {
1339 rtm = (struct rt_msghdr *)next;
1340 print_rtmsg(rtm, rtm->rtm_msglen);
1341 }
1342 }
1343
1344 static void
1345 monitor(void)
1346 {
1347 int n;
1348 char msg[2048];
1349
1350 verbose = 1;
1351 if (debugonly) {
1352 interfaces();
1353 exit(0);
1354 }
1355 for (;;) {
1356 time_t now;
1357 n = read(s, msg, 2048);
1358 now = time(NULL);
1359 printf("\ngot message of size %d on %s", n, ctime(&now));
1360 print_rtmsg((struct rt_msghdr *)msg, n);
1361 }
1362 }
1363
1364 struct {
1365 struct rt_msghdr m_rtm;
1366 char m_space[512];
1367 } m_rtmsg;
1368
1369 static int
1370 rtmsg(int cmd, int flags)
1371 {
1372 static int seq;
1373 int rlen;
1374 char *cp = m_rtmsg.m_space;
1375 int l;
1376
1377 #define NEXTADDR(w, u) \
1378 if (rtm_addrs & (w)) {\
1379 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\
1380 if (verbose) sodump(&(u),"u");\
1381 }
1382
1383 errno = 0;
1384 memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1385 if (cmd == 'a')
1386 cmd = RTM_ADD;
1387 else if (cmd == 'c')
1388 cmd = RTM_CHANGE;
1389 else if (cmd == 'g') {
1390 cmd = RTM_GET;
1391 if (so_ifp.sa.sa_family == 0) {
1392 so_ifp.sa.sa_family = AF_LINK;
1393 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1394 rtm_addrs |= RTA_IFP;
1395 }
1396 } else
1397 cmd = RTM_DELETE;
1398 #define rtm m_rtmsg.m_rtm
1399 rtm.rtm_type = cmd;
1400 rtm.rtm_flags = flags;
1401 rtm.rtm_version = RTM_VERSION;
1402 rtm.rtm_seq = ++seq;
1403 rtm.rtm_addrs = rtm_addrs;
1404 rtm.rtm_rmx = rt_metrics;
1405 rtm.rtm_inits = rtm_inits;
1406
1407 if (rtm_addrs & RTA_NETMASK)
1408 mask_addr();
1409 NEXTADDR(RTA_DST, so_dst);
1410 NEXTADDR(RTA_GATEWAY, so_gate);
1411 NEXTADDR(RTA_NETMASK, so_mask);
1412 NEXTADDR(RTA_GENMASK, so_genmask);
1413 NEXTADDR(RTA_IFP, so_ifp);
1414 NEXTADDR(RTA_IFA, so_ifa);
1415 NEXTADDR(RTA_MPLS1, so_mpls1);
1416 NEXTADDR(RTA_MPLS2, so_mpls2);
1417 NEXTADDR(RTA_MPLS3, so_mpls3);
1418 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1419 if (verbose)
1420 print_rtmsg(&rtm, l);
1421 if (debugonly)
1422 return(0);
1423 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1424 warn("writing to routing socket");
1425 return(-1);
1426 }
1427 if (cmd == RTM_GET) {
1428 do {
1429 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1430 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1431 if (l < 0)
1432 warn("read from routing socket");
1433 else
1434 print_getmsg(&rtm, l);
1435 }
1436 #undef rtm
1437 return(0);
1438 }
1439
1440 static void
1441 mask_addr(void)
1442 {
1443 int olen = so_mask.sa.sa_len;
1444 char *cp1 = olen + (char *)&so_mask, *cp2;
1445
1446 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1447 if (*--cp1 != 0) {
1448 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1449 break;
1450 }
1451 if ((rtm_addrs & RTA_DST) == 0)
1452 return;
1453 switch (so_dst.sa.sa_family) {
1454 #ifdef NS
1455 case AF_NS:
1456 #endif
1457 case AF_INET:
1458 #ifdef INET6
1459 case AF_INET6:
1460 #endif
1461 case AF_APPLETALK:
1462 case 0:
1463 return;
1464 }
1465 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1466 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1467 while (cp2 > cp1)
1468 *--cp2 = 0;
1469 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1470 while (cp1 > so_dst.sa.sa_data)
1471 *--cp1 &= *--cp2;
1472 }
1473
1474 const char *msgtypes[] = {
1475 "",
1476 "RTM_ADD: Add Route",
1477 "RTM_DELETE: Delete Route",
1478 "RTM_CHANGE: Change Metrics or flags",
1479 "RTM_GET: Report Metrics",
1480 "RTM_LOSING: Kernel Suspects Partitioning",
1481 "RTM_REDIRECT: Told to use different route",
1482 "RTM_MISS: Lookup failed on this address",
1483 "RTM_LOCK: fix specified metrics",
1484 "RTM_OLDADD: caused by SIOCADDRT",
1485 "RTM_OLDDEL: caused by SIOCDELRT",
1486 "RTM_RESOLVE: Route created by cloning",
1487 "RTM_NEWADDR: address being added to iface",
1488 "RTM_DELADDR: address being removed from iface",
1489 "RTM_IFINFO: iface status change",
1490 "RTM_NEWMADDR: new multicast group membership on iface",
1491 "RTM_DELMADDR: multicast group membership removed from iface",
1492 "RTM_IFANNOUNCE: interface arrival/departure",
1493 0,
1494 };
1495
1496 char metricnames[] =
1497 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1498 "\1mtu";
1499 char routeflags[] =
1500 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1501 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1502 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1503 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1504 char ifnetflags[] =
1505 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1506 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1507 "\017LINK2\020MULTICAST";
1508 char addrnames[] =
1509 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"
1510 "\011MPLS1\012MPLS2\013MPLS3";
1511
1512 static void
1513 print_rtmsg(struct rt_msghdr *rtm, int msglen __unused)
1514 {
1515 struct if_msghdr *ifm;
1516 struct ifa_msghdr *ifam;
1517 #ifdef RTM_NEWMADDR
1518 struct ifma_msghdr *ifmam;
1519 #endif
1520 struct if_announcemsghdr *ifan;
1521
1522 if (verbose == 0)
1523 return;
1524 if (rtm->rtm_version != RTM_VERSION) {
1525 printf("routing message version %d not understood\n",
1526 rtm->rtm_version);
1527 return;
1528 }
1529 if (msgtypes[rtm->rtm_type] != NULL)
1530 printf("%s: ", msgtypes[rtm->rtm_type]);
1531 else
1532 printf("#%d: ", rtm->rtm_type);
1533 printf("len %d, ", rtm->rtm_msglen);
1534 switch (rtm->rtm_type) {
1535 case RTM_IFINFO:
1536 ifm = (struct if_msghdr *)rtm;
1537 printf("if# %d, flags:", ifm->ifm_index);
1538 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1539 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1540 break;
1541 case RTM_NEWADDR:
1542 case RTM_DELADDR:
1543 ifam = (struct ifa_msghdr *)rtm;
1544 printf("metric %d, flags:", ifam->ifam_metric);
1545 bprintf(stdout, ifam->ifam_flags, routeflags);
1546 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1547 break;
1548 #ifdef RTM_NEWMADDR
1549 case RTM_NEWMADDR:
1550 case RTM_DELMADDR:
1551 ifmam = (struct ifma_msghdr *)rtm;
1552 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1553 break;
1554 #endif
1555 case RTM_IFANNOUNCE:
1556 ifan = (struct if_announcemsghdr *)rtm;
1557 printf("if# %d, what: ", ifan->ifan_index);
1558 switch (ifan->ifan_what) {
1559 case IFAN_ARRIVAL:
1560 printf("arrival");
1561 break;
1562 case IFAN_DEPARTURE:
1563 printf("departure");
1564 break;
1565 default:
1566 printf("#%d", ifan->ifan_what);
1567 break;
1568 }
1569 printf("\n");
1570 break;
1571
1572 default:
1573 printf("pid: %ld, seq %d, errno %d, flags:",
1574 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1575 bprintf(stdout, rtm->rtm_flags, routeflags);
1576 pmsg_common(rtm);
1577 }
1578 }
1579
1580 static void
1581 print_getmsg(struct rt_msghdr *rtm, int msglen)
1582 {
1583 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1584 struct sockaddr_dl *ifp = NULL;
1585 struct sockaddr *sa;
1586 char *cp;
1587 int i;
1588
1589 printf(" route to: %s\n", routename(&so_dst.sa));
1590 if (rtm->rtm_version != RTM_VERSION) {
1591 warnx("routing message version %d not understood",
1592 rtm->rtm_version);
1593 return;
1594 }
1595 if (rtm->rtm_msglen > msglen) {
1596 warnx("message length mismatch, in packet %d, returned %d",
1597 rtm->rtm_msglen, msglen);
1598 }
1599 if (rtm->rtm_errno != 0) {
1600 errno = rtm->rtm_errno;
1601 warn("message indicates error %d", errno);
1602 return;
1603 }
1604 cp = ((char *)(rtm + 1));
1605 if (rtm->rtm_addrs)
1606 for (i = 1; i != 0; i <<= 1)
1607 if (i & rtm->rtm_addrs) {
1608 sa = (struct sockaddr *)cp;
1609 switch (i) {
1610 case RTA_DST:
1611 dst = sa;
1612 break;
1613 case RTA_GATEWAY:
1614 gate = sa;
1615 break;
1616 case RTA_NETMASK:
1617 mask = sa;
1618 break;
1619 case RTA_IFP:
1620 if (sa->sa_family == AF_LINK &&
1621 ((struct sockaddr_dl *)sa)->sdl_nlen)
1622 ifp = (struct sockaddr_dl *)sa;
1623 break;
1624 }
1625 ADVANCE(cp, sa);
1626 }
1627 if (dst != NULL && mask != NULL)
1628 mask->sa_family = dst->sa_family; /* XXX */
1629 if (dst != NULL)
1630 printf("destination: %s\n", routename(dst));
1631 if (mask != NULL) {
1632 int savenflag = nflag;
1633
1634 nflag = 1;
1635 printf(" mask: %s\n", routename(mask));
1636 nflag = savenflag;
1637 }
1638 if (gate != NULL && rtm->rtm_flags & RTF_GATEWAY)
1639 printf(" gateway: %s\n", routename(gate));
1640 if (ifp != NULL)
1641 printf(" interface: %.*s\n",
1642 ifp->sdl_nlen, ifp->sdl_data);
1643 printf(" flags: ");
1644 bprintf(stdout, rtm->rtm_flags, routeflags);
1645
1646 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1647 #define msec(u) (((u) + 500) / 1000) /* usec to msec */
1648
1649 printf("\n%s\n", "\
1650 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire");
1651 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1652 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1653 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1654 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1655 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1656 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1657 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1658 if (rtm->rtm_rmx.rmx_expire != 0)
1659 rtm->rtm_rmx.rmx_expire -= time(0);
1660 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1661 #undef lock
1662 #undef msec
1663 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1664 if (verbose)
1665 pmsg_common(rtm);
1666 else if (rtm->rtm_addrs &~ RTA_IGN) {
1667 printf("sockaddrs: ");
1668 bprintf(stdout, rtm->rtm_addrs, addrnames);
1669 putchar('\n');
1670 }
1671 #undef RTA_IGN
1672 }
1673
1674 static void
1675 pmsg_common(struct rt_msghdr *rtm)
1676 {
1677 printf("\nlocks: ");
1678 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1679 printf(" inits: ");
1680 bprintf(stdout, rtm->rtm_inits, metricnames);
1681 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1682 }
1683
1684 static void
1685 pmsg_addrs(char *cp, int addrs)
1686 {
1687 struct sockaddr *sa;
1688 int i;
1689
1690 if (addrs == 0) {
1691 putchar('\n');
1692 return;
1693 }
1694 printf("\nsockaddrs: ");
1695 bprintf(stdout, addrs, addrnames);
1696 putchar('\n');
1697 for (i = 1; i != 0; i <<= 1)
1698 if (i & addrs) {
1699 sa = (struct sockaddr *)cp;
1700 printf(" %s", routename(sa));
1701 ADVANCE(cp, sa);
1702 }
1703 putchar('\n');
1704 fflush(stdout);
1705 }
1706
1707 static void
1708 bprintf(FILE *fp, int b, u_char *str)
1709 {
1710 int i;
1711 int gotsome = 0;
1712
1713 if (b == 0)
1714 return;
1715 while ((i = *str++) != 0) {
1716 if (b & (1 << (i-1))) {
1717 if (!gotsome)
1718 i = '<';
1719 else
1720 i = ',';
1721 putc(i, fp);
1722 gotsome = 1;
1723 for (; (i = *str) > 32; str++)
1724 putc(i, fp);
1725 } else
1726 while (*str > 32)
1727 str++;
1728 }
1729 if (gotsome)
1730 putc('>', fp);
1731 }
1732
1733 int
1734 keyword(const char *cp)
1735 {
1736 struct keytab *kt = keywords;
1737
1738 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
1739 kt++;
1740 return(kt->kt_i);
1741 }
1742
1743 static void
1744 sodump(sup su, const char *which)
1745 {
1746 switch (su->sa.sa_family) {
1747 case AF_LINK:
1748 printf("%s: link %s; ",
1749 which, link_ntoa(&su->sdl));
1750 break;
1751 case AF_INET:
1752 printf("%s: inet %s; ",
1753 which, inet_ntoa(su->sin.sin_addr));
1754 break;
1755 case AF_APPLETALK:
1756 printf("%s: atalk %s; ",
1757 which, atalk_ntoa(su->sat.sat_addr));
1758 break;
1759 #ifdef NS
1760 case AF_NS:
1761 printf("%s: xns %s; ",
1762 which, ns_ntoa(su->sns.sns_addr));
1763 break;
1764 #endif
1765 }
1766 fflush(stdout);
1767 }
1768
1769 /* States*/
1770 #define VIRGIN 0
1771 #define GOTONE 1
1772 #define GOTTWO 2
1773 /* Inputs */
1774 #define DIGIT (4*0)
1775 #define END (4*1)
1776 #define DELIM (4*2)
1777
1778 static void
1779 sockaddr(char *addr, struct sockaddr *sa)
1780 {
1781 char *cp = (char *)sa;
1782 int size = sa->sa_len;
1783 char *cplim = cp + size;
1784 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1785
1786 memset(cp, 0, size);
1787 cp++;
1788 do {
1789 if ((*addr >= '0') && (*addr <= '9')) {
1790 new = *addr - '0';
1791 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1792 new = *addr - 'a' + 10;
1793 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1794 new = *addr - 'A' + 10;
1795 } else if (*addr == '\0')
1796 state |= END;
1797 else
1798 state |= DELIM;
1799 addr++;
1800 switch (state /* | INPUT */) {
1801 case GOTTWO | DIGIT:
1802 *cp++ = byte; /*FALLTHROUGH*/
1803 case VIRGIN | DIGIT:
1804 state = GOTONE; byte = new; continue;
1805 case GOTONE | DIGIT:
1806 state = GOTTWO; byte = new + (byte << 4); continue;
1807 default: /* | DELIM */
1808 state = VIRGIN; *cp++ = byte; byte = 0; continue;
1809 case GOTONE | END:
1810 case GOTTWO | END:
1811 *cp++ = byte; /* FALLTHROUGH */
1812 case VIRGIN | END:
1813 break;
1814 }
1815 break;
1816 } while (cp < cplim);
1817 sa->sa_len = cp - (char *)sa;
1818 }
1819
1820 static int
1821 atalk_aton(const char *text, struct at_addr *addr)
1822 {
1823 u_int net, node;
1824
1825 if (sscanf(text, "%u.%u", &net, &node) != 2
1826 || net > 0xffff || node > 0xff)
1827 return(0);
1828 addr->s_net = htons(net);
1829 addr->s_node = node;
1830 return(1);
1831 }
1832
1833 static char *
1834 atalk_ntoa(struct at_addr at)
1835 {
1836 static char buf[20];
1837
1838 snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1839 return(buf);
1840 }
DragonFly BSD