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[dragonfly.git] / sbin / route / route.c
blob9c908e7f81c526edb777f43d276f6b0c7a207eb5
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 /*
919 * XXX: This approach unable to handle 0.0.0.1/32 correctly
920 * as inet_network() converts 0.0.0.1 and 1 equally.
921 */
922 if (net <= 0xff)
923 addr = net << IN_CLASSA_NSHIFT;
924 else if (net <= 0xffff)
925 addr = net << IN_CLASSB_NSHIFT;
926 else if (net <= 0xffffff)
927 addr = net << IN_CLASSC_NSHIFT;
928 else
929 addr = net;
930
931 if (bits != 0)
932 mask = 0xffffffff << (32 - bits);
933 else if (net == 0)
934 mask = 0;
935 else if (IN_CLASSA(addr))
936 mask = IN_CLASSA_NET;
937 else if (IN_CLASSB(addr))
938 mask = IN_CLASSB_NET;
939 else if (IN_CLASSC(addr))
940 mask = IN_CLASSC_NET;
941 else if (IN_MULTICAST(addr))
942 mask = IN_CLASSD_NET;
943 else
944 mask = 0xffffffff;
945
946 in->sin_addr.s_addr = htonl(addr);
947 in = &so_mask.sin;
948 in->sin_addr.s_addr = htonl(mask);
949 in->sin_len = 0;
950 in->sin_family = 0;
951 cp = (char *)(&in->sin_addr + 1);
952 while (*--cp == 0 && cp > (char *)in)
953 ;
954 in->sin_len = 1 + cp - (char *)in;
955 }
956
957 #ifdef INET6
958 /*
959 * XXX the function may need more improvement...
960 */
961 static int
962 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
963 {
964 struct in6_addr in6;
965
966 if (plen == NULL) {
967 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
968 sin6->sin6_scope_id == 0) {
969 plen = "0";
970 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
971 /* aggregatable global unicast - RFC2374 */
972 memset(&in6, 0, sizeof(in6));
973 if (memcmp(&sin6->sin6_addr.s6_addr[8],
974 &in6.s6_addr[8], 8) == 0)
975 plen = "64";
976 }
977 }
978
979 if (plen == NULL || strcmp(plen, "128") == 0)
980 return(1);
981 rtm_addrs |= RTA_NETMASK;
982 prefixlen(plen);
983 return(0);
984 }
985 #endif
986
987 /*
988 * Interpret an argument as a network address of some kind,
989 * returning 1 if a host address, 0 if a network address.
990 */
991 static int
992 getaddr(int which, char *str, struct hostent **hpp)
993 {
994 sup su;
995 struct hostent *hp;
996 struct netent *np;
997 u_long val;
998 char *q;
999 int afamily; /* local copy of af so we can change it */
1000
1001 if (af == 0) {
1002 af = AF_INET;
1003 aflen = sizeof(struct sockaddr_in);
1004 }
1005 afamily = af;
1006 rtm_addrs |= which;
1007 switch (which) {
1008 case RTA_DST:
1009 su = &so_dst;
1010 break;
1011 case RTA_GATEWAY:
1012 su = &so_gate;
1013 if (iflag) {
1014 struct ifaddrs *ifap, *ifa;
1015 struct sockaddr_dl *sdl = NULL;
1016
1017 if (getifaddrs(&ifap))
1018 err(1, "getifaddrs");
1019
1020 for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
1021 if (ifa->ifa_addr->sa_family != AF_LINK)
1022 continue;
1023
1024 if (strcmp(str, ifa->ifa_name) != 0)
1025 continue;
1026
1027 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1028 }
1029 /* If we found it, then use it */
1030 if (sdl != NULL) {
1031 /*
1032 * Copy is safe since we have a
1033 * sockaddr_storage member in sockunion{}.
1034 * Note that we need to copy before calling
1035 * freeifaddrs().
1036 *
1037 * Interface routes are routed only by their
1038 * sdl_index or interface name (we provide
1039 * both here), not by the ARP address of the
1040 * local interface (alen, slen = 0).
1041 */
1042 memcpy(&su->sdl, sdl, sdl->sdl_len);
1043 su->sdl.sdl_alen = 0;
1044 su->sdl.sdl_slen = 0;
1045 }
1046 freeifaddrs(ifap);
1047 if (sdl != NULL)
1048 return(1);
1049 }
1050 break;
1051 case RTA_NETMASK:
1052 su = &so_mask;
1053 break;
1054 case RTA_GENMASK:
1055 su = &so_genmask;
1056 break;
1057 case RTA_IFP:
1058 su = &so_ifp;
1059 afamily = AF_LINK;
1060 break;
1061 case RTA_IFA:
1062 su = &so_ifa;
1063 break;
1064 case RTA_MPLS1:
1065 su = &so_mpls1;
1066 break;
1067 case RTA_MPLS2:
1068 su = &so_mpls2;
1069 break;
1070 case RTA_MPLS3:
1071 su = &so_mpls3;
1072 break;
1073 default:
1074 usage("internal error");
1075 /*NOTREACHED*/
1076 }
1077 su->sa.sa_len = aflen;
1078 su->sa.sa_family = afamily; /* cases that don't want it have left
1079 already */
1080 if (strcmp(str, "default") == 0) {
1081 /*
1082 * Default is net 0.0.0.0/0
1083 */
1084 switch (which) {
1085 case RTA_DST:
1086 forcenet++;
1087 /* bzero(su, sizeof(*su)); *//* for readability */
1088 getaddr(RTA_NETMASK, str, 0);
1089 break;
1090 case RTA_NETMASK:
1091 case RTA_GENMASK:
1092 /* bzero(su, sizeof(*su)); *//* for readability */
1093 break;
1094 }
1095 return(0);
1096 }
1097 switch (afamily) {
1098 #ifdef INET6
1099 case AF_INET6:
1100 {
1101 struct addrinfo hints, *res;
1102
1103 q = NULL;
1104 if (which == RTA_DST && (q = strchr(str, '/')) != NULL)
1105 *q = '\0';
1106 memset(&hints, 0, sizeof(hints));
1107 hints.ai_family = afamily; /*AF_INET6*/
1108 hints.ai_flags = AI_NUMERICHOST;
1109 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1110 if (getaddrinfo(str, "0", &hints, &res) != 0 ||
1111 res->ai_family != AF_INET6 ||
1112 res->ai_addrlen != sizeof(su->sin6)) {
1113 fprintf(stderr, "%s: bad value\n", str);
1114 exit(1);
1115 }
1116 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
1117 #ifdef __KAME__
1118 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
1119 IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) &&
1120 su->sin6.sin6_scope_id) {
1121 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1122 htons(su->sin6.sin6_scope_id);
1123 su->sin6.sin6_scope_id = 0;
1124 }
1125 #endif
1126 freeaddrinfo(res);
1127 if (q != NULL)
1128 *q++ = '/';
1129 if (which == RTA_DST)
1130 return(inet6_makenetandmask(&su->sin6, q));
1131 return(0);
1132 }
1133 #endif /* INET6 */
1134
1135 #ifdef NS
1136 case AF_NS:
1137 if (which == RTA_DST) {
1138 struct sockaddr_ns *sms = &(so_mask.sns);
1139 memset(sms, 0, sizeof(*sms));
1140 sms->sns_family = 0;
1141 sms->sns_len = 6;
1142 sms->sns_addr.x_net = *(union ns_net *)ns_bh;
1143 rtm_addrs |= RTA_NETMASK;
1144 }
1145 su->sns.sns_addr = ns_addr(str);
1146 return(!ns_nullhost(su->sns.sns_addr));
1147 #endif
1148
1149 case AF_APPLETALK:
1150 if (!atalk_aton(str, &su->sat.sat_addr))
1151 errx(EX_NOHOST, "bad address: %s", str);
1152 rtm_addrs |= RTA_NETMASK;
1153 return(forcehost || su->sat.sat_addr.s_node != 0);
1154
1155 case AF_LINK:
1156 link_addr(str, &su->sdl);
1157 return(1);
1158
1159 case PF_ROUTE:
1160 su->sa.sa_len = sizeof(*su);
1161 sockaddr(str, &su->sa);
1162 return(1);
1163
1164 case AF_MPLS:
1165 {
1166 mpls_label_t label;
1167
1168 bzero(su, sizeof(*su));
1169 su->sa.sa_len = sizeof(*su);
1170 su->sa.sa_family = AF_MPLS;
1171 su->smpls.smpls_op = mplsop;
1172 if (mplsop != MPLSLOP_POP && mplsop != MPLSLOP_POPALL &&
1173 *str != '\0') {
1174 if (sscanf(str, "%u", &label) != 1)
1175 errx(EX_NOHOST, "bad address: %s", str);
1176 su->smpls.smpls_label = htonl(label);
1177 }
1178 return(1);
1179 }
1180
1181 case AF_INET:
1182 default:
1183 break;
1184 }
1185
1186 if (hpp == NULL)
1187 hpp = &hp;
1188 *hpp = NULL;
1189
1190 q = strchr(str,'/');
1191 if (q != NULL && which == RTA_DST) {
1192 *q = '\0';
1193 if ((val = inet_network(str)) != INADDR_NONE) {
1194 inet_makenetandmask(
1195 val, &su->sin, strtoul(q+1, 0, 0));
1196 return(0);
1197 }
1198 *q = '/';
1199 }
1200 if ((which != RTA_DST || forcenet == 0) &&
1201 inet_aton(str, &su->sin.sin_addr)) {
1202 val = su->sin.sin_addr.s_addr;
1203 if (which != RTA_DST ||
1204 inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1205 return(1);
1206 else {
1207 val = ntohl(val);
1208 goto netdone;
1209 }
1210 }
1211 if (which == RTA_DST && forcehost == 0 &&
1212 ((val = inet_network(str)) != INADDR_NONE ||
1213 ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) {
1214 netdone:
1215 inet_makenetandmask(val, &su->sin, 0);
1216 return(0);
1217 }
1218 hp = gethostbyname(str);
1219 if (hp != NULL) {
1220 *hpp = hp;
1221 su->sin.sin_family = hp->h_addrtype;
1222 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1223 MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr)));
1224 return(1);
1225 }
1226 errx(EX_NOHOST, "bad address: %s", str);
1227 }
1228
1229 static int
1230 prefixlen(const char *len_str)
1231 {
1232 int len = atoi(len_str), q, r;
1233 int max;
1234 char *p;
1235
1236 rtm_addrs |= RTA_NETMASK;
1237 switch (af) {
1238 #ifdef INET6
1239 case AF_INET6:
1240 max = 128;
1241 p = (char *)&so_mask.sin6.sin6_addr;
1242 break;
1243 #endif
1244 case AF_INET:
1245 max = 32;
1246 p = (char *)&so_mask.sin.sin_addr;
1247 break;
1248 default:
1249 fprintf(stderr, "prefixlen not supported in this af\n");
1250 exit(1);
1251 /*NOTREACHED*/
1252 }
1253
1254 if (len < 0 || max < len) {
1255 fprintf(stderr, "%s: bad value\n", len_str);
1256 exit(1);
1257 }
1258
1259 q = len >> 3;
1260 r = len & 7;
1261 so_mask.sa.sa_family = af;
1262 so_mask.sa.sa_len = aflen;
1263 memset((void *)p, 0, max / 8);
1264 if (q > 0)
1265 memset((void *)p, 0xff, q);
1266 if (r > 0)
1267 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1268 if (len == max)
1269 return(-1);
1270 else
1271 return(len);
1272 }
1273
1274 #ifdef NS
1275 short ns_nullh[] = {0,0,0};
1276
1277 char *
1278 ns_print(struct sockaddr_ns *sns)
1279 {
1280 struct ns_addr work;
1281 union { union ns_net net_e; u_long long_e; } net;
1282 u_short port;
1283 static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25];
1284 const char *host = "";
1285 char *p;
1286 u_char *q;
1287
1288 work = sns->sns_addr;
1289 port = ntohs(work.x_port);
1290 work.x_port = 0;
1291 net.net_e = work.x_net;
1292 if (ns_nullhost(work) && net.long_e == 0) {
1293 if (port == 0)
1294 strncpy(mybuf, "*.*", sizeof(mybuf));
1295 else
1296 sprintf(mybuf, "*.%XH", port);
1297 return(mybuf);
1298 }
1299
1300 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0)
1301 host = "any";
1302 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0)
1303 host = "*";
1304 else {
1305 q = work.x_host.c_host;
1306 sprintf(chost, "%02X%02X%02X%02X%02X%02XH",
1307 q[0], q[1], q[2], q[3], q[4], q[5]);
1308 for (p = chost; *p == '0' && p < chost + 12; p++)
1309 /* void */;
1310 host = p;
1311 }
1312 if (port != 0)
1313 sprintf(cport, ".%XH", htons(port));
1314 else
1315 *cport = 0;
1316
1317 snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s",
1318 (unsigned long)ntohl(net.long_e),
1319 host, cport);
1320 return(mybuf);
1321 }
1322 #endif
1323
1324 static void
1325 interfaces(void)
1326 {
1327 size_t needed;
1328 int mib[6];
1329 char *buf, *lim, *next;
1330 struct rt_msghdr *rtm;
1331
1332 mib[0] = CTL_NET;
1333 mib[1] = PF_ROUTE;
1334 mib[2] = 0; /* protocol */
1335 mib[3] = 0; /* wildcard address family */
1336 mib[4] = NET_RT_IFLIST;
1337 mib[5] = 0; /* no flags */
1338 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1339 err(EX_OSERR, "route-sysctl-estimate");
1340 if ((buf = malloc(needed)) == NULL)
1341 errx(EX_OSERR, "malloc failed");
1342 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1343 err(EX_OSERR, "actual retrieval of interface table");
1344 lim = buf + needed;
1345 for (next = buf; next < lim; next += rtm->rtm_msglen) {
1346 rtm = (struct rt_msghdr *)next;
1347 print_rtmsg(rtm, rtm->rtm_msglen);
1348 }
1349 }
1350
1351 static void
1352 monitor(void)
1353 {
1354 int n;
1355 char msg[2048];
1356
1357 verbose = 1;
1358 if (debugonly) {
1359 interfaces();
1360 exit(0);
1361 }
1362 for (;;) {
1363 time_t now;
1364 n = read(s, msg, 2048);
1365 now = time(NULL);
1366 printf("\ngot message of size %d on %s", n, ctime(&now));
1367 print_rtmsg((struct rt_msghdr *)msg, n);
1368 }
1369 }
1370
1371 struct {
1372 struct rt_msghdr m_rtm;
1373 char m_space[512];
1374 } m_rtmsg;
1375
1376 static int
1377 rtmsg(int cmd, int flags)
1378 {
1379 static int seq;
1380 int rlen;
1381 char *cp = m_rtmsg.m_space;
1382 int l;
1383
1384 #define NEXTADDR(w, u) \
1385 if (rtm_addrs & (w)) {\
1386 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\
1387 if (verbose) sodump(&(u),"u");\
1388 }
1389
1390 errno = 0;
1391 memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1392 if (cmd == 'a')
1393 cmd = RTM_ADD;
1394 else if (cmd == 'c')
1395 cmd = RTM_CHANGE;
1396 else if (cmd == 'g') {
1397 cmd = RTM_GET;
1398 if (so_ifp.sa.sa_family == 0) {
1399 so_ifp.sa.sa_family = AF_LINK;
1400 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1401 rtm_addrs |= RTA_IFP;
1402 }
1403 } else
1404 cmd = RTM_DELETE;
1405 #define rtm m_rtmsg.m_rtm
1406 rtm.rtm_type = cmd;
1407 rtm.rtm_flags = flags;
1408 rtm.rtm_version = RTM_VERSION;
1409 rtm.rtm_seq = ++seq;
1410 rtm.rtm_addrs = rtm_addrs;
1411 rtm.rtm_rmx = rt_metrics;
1412 rtm.rtm_inits = rtm_inits;
1413
1414 if (rtm_addrs & RTA_NETMASK)
1415 mask_addr();
1416 NEXTADDR(RTA_DST, so_dst);
1417 NEXTADDR(RTA_GATEWAY, so_gate);
1418 NEXTADDR(RTA_NETMASK, so_mask);
1419 NEXTADDR(RTA_GENMASK, so_genmask);
1420 NEXTADDR(RTA_IFP, so_ifp);
1421 NEXTADDR(RTA_IFA, so_ifa);
1422 NEXTADDR(RTA_MPLS1, so_mpls1);
1423 NEXTADDR(RTA_MPLS2, so_mpls2);
1424 NEXTADDR(RTA_MPLS3, so_mpls3);
1425 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1426 if (verbose)
1427 print_rtmsg(&rtm, l);
1428 if (debugonly)
1429 return(0);
1430 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1431 warn("writing to routing socket");
1432 return(-1);
1433 }
1434 if (cmd == RTM_GET) {
1435 do {
1436 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1437 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1438 if (l < 0)
1439 warn("read from routing socket");
1440 else
1441 print_getmsg(&rtm, l);
1442 }
1443 #undef rtm
1444 return(0);
1445 }
1446
1447 static void
1448 mask_addr(void)
1449 {
1450 int olen = so_mask.sa.sa_len;
1451 char *cp1 = olen + (char *)&so_mask, *cp2;
1452
1453 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1454 if (*--cp1 != 0) {
1455 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1456 break;
1457 }
1458 if ((rtm_addrs & RTA_DST) == 0)
1459 return;
1460 switch (so_dst.sa.sa_family) {
1461 #ifdef NS
1462 case AF_NS:
1463 #endif
1464 case AF_INET:
1465 #ifdef INET6
1466 case AF_INET6:
1467 #endif
1468 case AF_APPLETALK:
1469 case 0:
1470 return;
1471 }
1472 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1473 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1474 while (cp2 > cp1)
1475 *--cp2 = 0;
1476 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1477 while (cp1 > so_dst.sa.sa_data)
1478 *--cp1 &= *--cp2;
1479 }
1480
1481 const char *msgtypes[] = {
1482 "",
1483 "RTM_ADD: Add Route",
1484 "RTM_DELETE: Delete Route",
1485 "RTM_CHANGE: Change Metrics or flags",
1486 "RTM_GET: Report Metrics",
1487 "RTM_LOSING: Kernel Suspects Partitioning",
1488 "RTM_REDIRECT: Told to use different route",
1489 "RTM_MISS: Lookup failed on this address",
1490 "RTM_LOCK: fix specified metrics",
1491 "RTM_OLDADD: caused by SIOCADDRT",
1492 "RTM_OLDDEL: caused by SIOCDELRT",
1493 "RTM_RESOLVE: Route created by cloning",
1494 "RTM_NEWADDR: address being added to iface",
1495 "RTM_DELADDR: address being removed from iface",
1496 "RTM_IFINFO: iface status change",
1497 "RTM_NEWMADDR: new multicast group membership on iface",
1498 "RTM_DELMADDR: multicast group membership removed from iface",
1499 "RTM_IFANNOUNCE: interface arrival/departure",
1500 0,
1501 };
1502
1503 char metricnames[] =
1504 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1505 "\1mtu";
1506 char routeflags[] =
1507 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1508 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1509 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1510 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1511 char ifnetflags[] =
1512 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1513 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1514 "\017LINK2\020MULTICAST";
1515 char addrnames[] =
1516 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"
1517 "\011MPLS1\012MPLS2\013MPLS3";
1518
1519 static void
1520 print_rtmsg(struct rt_msghdr *rtm, int msglen __unused)
1521 {
1522 struct if_msghdr *ifm;
1523 struct ifa_msghdr *ifam;
1524 #ifdef RTM_NEWMADDR
1525 struct ifma_msghdr *ifmam;
1526 #endif
1527 struct if_announcemsghdr *ifan;
1528
1529 if (verbose == 0)
1530 return;
1531 if (rtm->rtm_version != RTM_VERSION) {
1532 printf("routing message version %d not understood\n",
1533 rtm->rtm_version);
1534 return;
1535 }
1536 if (msgtypes[rtm->rtm_type] != NULL)
1537 printf("%s: ", msgtypes[rtm->rtm_type]);
1538 else
1539 printf("#%d: ", rtm->rtm_type);
1540 printf("len %d, ", rtm->rtm_msglen);
1541 switch (rtm->rtm_type) {
1542 case RTM_IFINFO:
1543 ifm = (struct if_msghdr *)rtm;
1544 printf("if# %d, flags:", ifm->ifm_index);
1545 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1546 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1547 break;
1548 case RTM_NEWADDR:
1549 case RTM_DELADDR:
1550 ifam = (struct ifa_msghdr *)rtm;
1551 printf("metric %d, flags:", ifam->ifam_metric);
1552 bprintf(stdout, ifam->ifam_flags, routeflags);
1553 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1554 break;
1555 #ifdef RTM_NEWMADDR
1556 case RTM_NEWMADDR:
1557 case RTM_DELMADDR:
1558 ifmam = (struct ifma_msghdr *)rtm;
1559 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1560 break;
1561 #endif
1562 case RTM_IFANNOUNCE:
1563 ifan = (struct if_announcemsghdr *)rtm;
1564 printf("if# %d, what: ", ifan->ifan_index);
1565 switch (ifan->ifan_what) {
1566 case IFAN_ARRIVAL:
1567 printf("arrival");
1568 break;
1569 case IFAN_DEPARTURE:
1570 printf("departure");
1571 break;
1572 default:
1573 printf("#%d", ifan->ifan_what);
1574 break;
1575 }
1576 printf("\n");
1577 break;
1578
1579 default:
1580 printf("pid: %ld, seq %d, errno %d, flags:",
1581 (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1582 bprintf(stdout, rtm->rtm_flags, routeflags);
1583 pmsg_common(rtm);
1584 }
1585 }
1586
1587 static void
1588 print_getmsg(struct rt_msghdr *rtm, int msglen)
1589 {
1590 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1591 struct sockaddr_dl *ifp = NULL;
1592 struct sockaddr *sa;
1593 char *cp;
1594 int i;
1595
1596 printf(" route to: %s\n", routename(&so_dst.sa));
1597 if (rtm->rtm_version != RTM_VERSION) {
1598 warnx("routing message version %d not understood",
1599 rtm->rtm_version);
1600 return;
1601 }
1602 if (rtm->rtm_msglen > msglen) {
1603 warnx("message length mismatch, in packet %d, returned %d",
1604 rtm->rtm_msglen, msglen);
1605 }
1606 if (rtm->rtm_errno != 0) {
1607 errno = rtm->rtm_errno;
1608 warn("message indicates error %d", errno);
1609 return;
1610 }
1611 cp = ((char *)(rtm + 1));
1612 if (rtm->rtm_addrs)
1613 for (i = 1; i != 0; i <<= 1)
1614 if (i & rtm->rtm_addrs) {
1615 sa = (struct sockaddr *)cp;
1616 switch (i) {
1617 case RTA_DST:
1618 dst = sa;
1619 break;
1620 case RTA_GATEWAY:
1621 gate = sa;
1622 break;
1623 case RTA_NETMASK:
1624 mask = sa;
1625 break;
1626 case RTA_IFP:
1627 if (sa->sa_family == AF_LINK &&
1628 ((struct sockaddr_dl *)sa)->sdl_nlen)
1629 ifp = (struct sockaddr_dl *)sa;
1630 break;
1631 }
1632 ADVANCE(cp, sa);
1633 }
1634 if (dst != NULL && mask != NULL)
1635 mask->sa_family = dst->sa_family; /* XXX */
1636 if (dst != NULL)
1637 printf("destination: %s\n", routename(dst));
1638 if (mask != NULL) {
1639 int savenflag = nflag;
1640
1641 nflag = 1;
1642 printf(" mask: %s\n", routename(mask));
1643 nflag = savenflag;
1644 }
1645 if (gate != NULL && rtm->rtm_flags & RTF_GATEWAY)
1646 printf(" gateway: %s\n", routename(gate));
1647 if (ifp != NULL)
1648 printf(" interface: %.*s\n",
1649 ifp->sdl_nlen, ifp->sdl_data);
1650 printf(" flags: ");
1651 bprintf(stdout, rtm->rtm_flags, routeflags);
1652
1653 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1654 #define msec(u) (((u) + 500) / 1000) /* usec to msec */
1655
1656 printf("\n%s\n", "\
1657 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire");
1658 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1659 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1660 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1661 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1662 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1663 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1664 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1665 if (rtm->rtm_rmx.rmx_expire != 0)
1666 rtm->rtm_rmx.rmx_expire -= time(0);
1667 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1668 #undef lock
1669 #undef msec
1670 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1671 if (verbose)
1672 pmsg_common(rtm);
1673 else if (rtm->rtm_addrs &~ RTA_IGN) {
1674 printf("sockaddrs: ");
1675 bprintf(stdout, rtm->rtm_addrs, addrnames);
1676 putchar('\n');
1677 }
1678 #undef RTA_IGN
1679 }
1680
1681 static void
1682 pmsg_common(struct rt_msghdr *rtm)
1683 {
1684 printf("\nlocks: ");
1685 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1686 printf(" inits: ");
1687 bprintf(stdout, rtm->rtm_inits, metricnames);
1688 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1689 }
1690
1691 static void
1692 pmsg_addrs(char *cp, int addrs)
1693 {
1694 struct sockaddr *sa;
1695 int i;
1696
1697 if (addrs == 0) {
1698 putchar('\n');
1699 return;
1700 }
1701 printf("\nsockaddrs: ");
1702 bprintf(stdout, addrs, addrnames);
1703 putchar('\n');
1704 for (i = 1; i != 0; i <<= 1)
1705 if (i & addrs) {
1706 sa = (struct sockaddr *)cp;
1707 printf(" %s", routename(sa));
1708 ADVANCE(cp, sa);
1709 }
1710 putchar('\n');
1711 fflush(stdout);
1712 }
1713
1714 static void
1715 bprintf(FILE *fp, int b, u_char *str)
1716 {
1717 int i;
1718 int gotsome = 0;
1719
1720 if (b == 0)
1721 return;
1722 while ((i = *str++) != 0) {
1723 if (b & (1 << (i-1))) {
1724 if (!gotsome)
1725 i = '<';
1726 else
1727 i = ',';
1728 putc(i, fp);
1729 gotsome = 1;
1730 for (; (i = *str) > 32; str++)
1731 putc(i, fp);
1732 } else
1733 while (*str > 32)
1734 str++;
1735 }
1736 if (gotsome)
1737 putc('>', fp);
1738 }
1739
1740 int
1741 keyword(const char *cp)
1742 {
1743 struct keytab *kt = keywords;
1744
1745 while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
1746 kt++;
1747 return(kt->kt_i);
1748 }
1749
1750 static void
1751 sodump(sup su, const char *which)
1752 {
1753 switch (su->sa.sa_family) {
1754 case AF_LINK:
1755 printf("%s: link %s; ",
1756 which, link_ntoa(&su->sdl));
1757 break;
1758 case AF_INET:
1759 printf("%s: inet %s; ",
1760 which, inet_ntoa(su->sin.sin_addr));
1761 break;
1762 case AF_APPLETALK:
1763 printf("%s: atalk %s; ",
1764 which, atalk_ntoa(su->sat.sat_addr));
1765 break;
1766 #ifdef NS
1767 case AF_NS:
1768 printf("%s: xns %s; ",
1769 which, ns_ntoa(su->sns.sns_addr));
1770 break;
1771 #endif
1772 }
1773 fflush(stdout);
1774 }
1775
1776 /* States*/
1777 #define VIRGIN 0
1778 #define GOTONE 1
1779 #define GOTTWO 2
1780 /* Inputs */
1781 #define DIGIT (4*0)
1782 #define END (4*1)
1783 #define DELIM (4*2)
1784
1785 static void
1786 sockaddr(char *addr, struct sockaddr *sa)
1787 {
1788 char *cp = (char *)sa;
1789 int size = sa->sa_len;
1790 char *cplim = cp + size;
1791 int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1792
1793 memset(cp, 0, size);
1794 cp++;
1795 do {
1796 if ((*addr >= '0') && (*addr <= '9')) {
1797 new = *addr - '0';
1798 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1799 new = *addr - 'a' + 10;
1800 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1801 new = *addr - 'A' + 10;
1802 } else if (*addr == '\0')
1803 state |= END;
1804 else
1805 state |= DELIM;
1806 addr++;
1807 switch (state /* | INPUT */) {
1808 case GOTTWO | DIGIT:
1809 *cp++ = byte; /*FALLTHROUGH*/
1810 case VIRGIN | DIGIT:
1811 state = GOTONE; byte = new; continue;
1812 case GOTONE | DIGIT:
1813 state = GOTTWO; byte = new + (byte << 4); continue;
1814 default: /* | DELIM */
1815 state = VIRGIN; *cp++ = byte; byte = 0; continue;
1816 case GOTONE | END:
1817 case GOTTWO | END:
1818 *cp++ = byte; /* FALLTHROUGH */
1819 case VIRGIN | END:
1820 break;
1821 }
1822 break;
1823 } while (cp < cplim);
1824 sa->sa_len = cp - (char *)sa;
1825 }
1826
1827 static int
1828 atalk_aton(const char *text, struct at_addr *addr)
1829 {
1830 u_int net, node;
1831
1832 if (sscanf(text, "%u.%u", &net, &node) != 2
1833 || net > 0xffff || node > 0xff)
1834 return(0);
1835 addr->s_net = htons(net);
1836 addr->s_node = node;
1837 return(1);
1838 }
1839
1840 static char *
1841 atalk_ntoa(struct at_addr at)
1842 {
1843 static char buf[20];
1844
1845 snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1846 return(buf);
1847 }
DragonFly BSD