Merge branch 'vendor/BINUTILS224'
[dragonfly.git] / sbin / route / route.c
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. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * @(#) Copyright (c) 1983, 1989, 1991, 1993 The Regents of the University of California.  All rights reserved.
30  * @(#)route.c  8.6 (Berkeley) 4/28/95
31  * $FreeBSD: src/sbin/route/route.c,v 1.40.2.11 2003/02/27 23:10:10 ru Exp $
32  */
33
34 #include <sys/param.h>
35 #include <sys/file.h>
36 #include <sys/socket.h>
37 #include <sys/ioctl.h>
38 #include <sys/sysctl.h>
39 #include <sys/types.h>
40
41 #include <net/if.h>
42 #include <net/route.h>
43 #include <net/if_dl.h>
44 #include <netinet/in.h>
45 #include <netinet/if_ether.h>
46 #include <arpa/inet.h>
47 #include <netdb.h>
48
49 #include <netproto/mpls/mpls.h>
50
51 #include <ctype.h>
52 #include <err.h>
53 #include <errno.h>
54 #include <paths.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <sysexits.h>
59 #include <unistd.h>
60 #include <ifaddrs.h>
61
62 #include "extern.h"
63 #include "keywords.h"
64
65 union   sockunion {
66         struct  sockaddr sa;
67         struct  sockaddr_in sin;
68 #ifdef INET6
69         struct  sockaddr_in6 sin6;
70 #endif
71         struct  sockaddr_mpls smpls;
72         struct  sockaddr_dl sdl;
73         struct  sockaddr_inarp sinarp;
74         struct  sockaddr_storage ss; /* added to avoid memory overrun */
75 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp, so_mpls1,
76         so_mpls2, so_mpls3;
77
78 typedef union sockunion *sup;
79
80 int     nflag, wflag;
81 int     cpuflag = -1;
82
83 static struct ortentry route;
84 static struct rt_metrics rt_metrics;
85 static int      pid, rtm_addrs;
86 static int      s;
87 static int      forcehost, forcenet, af, qflag, tflag;
88 static int      iflag, verbose, aflen = sizeof(struct sockaddr_in);
89 static int      locking, lockrest, debugonly;
90 static int      mplsop, popcount, pushcount, swapcount;
91 static u_long   rtm_inits;
92 static uid_t    uid;
93
94 static void      flushroutes(int, char **);
95 static void      set_metric(char *, int);
96 static void      newroute(int, char **);
97 static void      inet_makenetandmask(u_long, struct sockaddr_in *, u_long);
98 static void      interfaces(void);
99 static void      monitor(void);
100 static void      sockaddr(const char *, struct sockaddr *);
101 static void      sodump(sup, const char *);
102 static void      bprintf(FILE *, int, u_char *);
103 static void      print_getmsg(struct rt_msghdr *, int);
104 static void      print_rtmsg(struct rt_msghdr *, int);
105 static void      pmsg_common(struct rt_msghdr *);
106 static void      pmsg_addrs(char *, int);
107 static void      mask_addr(void);
108 static int       getaddr(int, const char *, struct hostent **);
109 static int       rtmsg(int, int);
110 static int       prefixlen(const char *);
111 #ifdef INET6
112 static int       inet6_makenetandmask(struct sockaddr_in6 *, const char *);
113 #endif
114
115 void
116 usage(const char *cp)
117 {
118         if (cp != NULL)
119                 warnx("bad keyword: %s", cp);
120         fprintf(stderr, "usage: route [-dnqtv] command [[modifiers] args]\n");
121         exit(EX_USAGE);
122         /* NOTREACHED */
123 }
124
125 #define ROUNDUP(a) \
126         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
127 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
128
129 int
130 main(int argc, char **argv)
131 {
132         int ch;
133
134         if (argc < 2)
135                 usage(NULL);
136
137         while ((ch = getopt(argc, argv, "c:wnqdtv")) != -1)
138                 switch(ch) {
139                 case 'c':
140                         cpuflag = strtol(optarg, NULL, 0);
141                         break;
142                 case 'w':
143                         wflag = 1;
144                         break;
145                 case 'n':
146                         nflag = 1;
147                         break;
148                 case 'q':
149                         qflag = 1;
150                         break;
151                 case 'v':
152                         verbose = 1;
153                         break;
154                 case 't':
155                         tflag = 1;
156                         break;
157                 case 'd':
158                         debugonly = 1;
159                         break;
160                 case '?':
161                 default:
162                         usage(NULL);
163                 }
164         argc -= optind;
165         argv += optind;
166
167         pid = getpid();
168         uid = geteuid();
169         if (tflag)
170                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
171         else
172                 s = socket(PF_ROUTE, SOCK_RAW, 0);
173         if (s < 0)
174                 err(EX_OSERR, "socket");
175         if (*argv != NULL)
176                 switch (keyword(*argv)) {
177                 case K_GET:
178                         uid = 0;
179                         /* FALLTHROUGH */
180
181                 case K_CHANGE:
182                 case K_ADD:
183                 case K_DELETE:
184                         newroute(argc, argv);
185                         /* NOTREACHED */
186
187                 case K_SHOW:
188                         show(argc, argv);
189                         return(0);
190
191                 case K_MONITOR:
192                         monitor();
193                         /* NOTREACHED */
194
195                 case K_FLUSH:
196                         flushroutes(argc, argv);
197                         exit(0);
198                         /* NOTREACHED */
199                 }
200         usage(*argv);
201         /* NOTREACHED */
202 }
203
204 /*
205  * Purge all entries in the routing tables not
206  * associated with network interfaces.
207  */
208 static void
209 flushroutes(int argc, char **argv)
210 {
211         size_t needed;
212         int mib[7], rlen, seqno;
213         int miblen;
214         char *buf, *next, *lim;
215         struct rt_msghdr *rtm;
216
217         if (uid != 0) {
218                 errx(EX_NOPERM, "must be root to alter routing table");
219         }
220         shutdown(s, SHUT_RD); /* Don't want to read back our messages */
221         if (argc > 1) {
222                 argv++;
223                 if (argc == 2 && **argv == '-')
224                     switch (keyword(*argv + 1)) {
225                         case K_INET:
226                                 af = AF_INET;
227                                 break;
228 #ifdef INET6
229                         case K_INET6:
230                                 af = AF_INET6;
231                                 break;
232 #endif
233                         case K_LINK:
234                                 af = AF_LINK;
235                                 break;
236                         case K_MPLS:
237                                 af = AF_MPLS;
238                                 break;
239                         default:
240                                 goto bad;
241                 } else
242 bad:                    usage(*argv);
243         }
244         mib[0] = CTL_NET;
245         mib[1] = PF_ROUTE;
246         mib[2] = 0;             /* protocol */
247         mib[3] = 0;             /* wildcard address family */
248         mib[4] = NET_RT_DUMP;
249         mib[5] = 0;             /* no flags */
250         if (cpuflag >= 0) {
251                 mib[6] = cpuflag;
252                 miblen = 7;
253         } else {
254                 miblen = 6;
255         }
256         if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0)
257                 err(EX_OSERR, "route-sysctl-estimate");
258         if ((buf = malloc(needed)) == NULL)
259                 errx(EX_OSERR, "malloc failed");
260         if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0)
261                 err(EX_OSERR, "route-sysctl-get");
262         lim = buf + needed;
263         if (verbose)
264                 printf("Examining routing table from sysctl\n");
265         seqno = 0;              /* ??? */
266         for (next = buf; next < lim; next += rtm->rtm_msglen) {
267                 rtm = (struct rt_msghdr *)next;
268                 if (verbose)
269                         print_rtmsg(rtm, rtm->rtm_msglen);
270                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
271                         continue;
272                 if (af != 0) {
273                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
274
275                         if (sa->sa_family != af)
276                                 continue;
277                 }
278                 if (debugonly)
279                         continue;
280                 rtm->rtm_type = RTM_DELETE;
281                 rtm->rtm_seq = seqno;
282                 rlen = write(s, next, rtm->rtm_msglen);
283                 if (rlen < (int)rtm->rtm_msglen) {
284                         warn("write to routing socket");
285                         printf("got only %d for rlen\n", rlen);
286                         break;
287                 }
288                 seqno++;
289                 if (qflag)
290                         continue;
291                 if (verbose) {
292                         print_rtmsg(rtm, rlen);
293                 } else {
294                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
295                         if (wflag) {
296                             printf("%-20s ", rtm->rtm_flags & RTF_HOST ?
297                                 routename(sa) : netname(sa));
298                         } else {
299                             printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
300                                 routename(sa) : netname(sa));
301                         }
302                         sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) +
303                             (char *)sa);
304                         if (wflag) {
305                             printf("%-20s ", routename(sa));
306                         } else {
307                             printf("%-20.20s ", routename(sa));
308                         }
309                         printf("done\n");
310                 }
311         }
312 }
313
314 char *
315 routename(struct sockaddr *sa)
316 {
317         const char *cp;
318         static char line[MAXHOSTNAMELEN + 1];
319         struct hostent *hp;
320         static char domain[MAXHOSTNAMELEN + 1];
321         static int first = 1;
322
323         if (first) {
324                 first = 0;
325                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
326                     (cp = strchr(domain, '.'))) {
327                         domain[MAXHOSTNAMELEN] = '\0';
328                         strcpy(domain, cp + 1);
329                 } else
330                         domain[0] = 0;
331         }
332
333         if (sa->sa_len == 0)
334                 strcpy(line, "default");
335         else switch (sa->sa_family) {
336
337         case AF_INET:
338             {   struct in_addr in;
339                 in = ((struct sockaddr_in *)sa)->sin_addr;
340
341                 cp = NULL;
342                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
343                         cp = "default";
344                 if (cp == NULL && !nflag) {
345                         hp = gethostbyaddr(&in, sizeof(struct in_addr),
346                                 AF_INET);
347                         if (hp != NULL) {
348                                 char *cptr;
349                                 cptr = strchr(hp->h_name, '.');
350                                 if (cptr != NULL && !wflag &&
351                                     strcmp(cptr + 1, domain) == 0)
352                                         *cptr = '\0';
353                                 cp = hp->h_name;
354                         }
355                 }
356                 if (cp != NULL) {
357                         strncpy(line, cp, sizeof(line) - 1);
358                         line[sizeof(line) - 1] = '\0';
359                 } else
360                         sprintf(line, "%s", inet_ntoa(in));
361                 break;
362             }
363
364 #ifdef INET6
365         case AF_INET6:
366         {
367                 struct sockaddr_in6 sin6; /* use static var for safety */
368                 int niflags = 0;
369 #ifdef NI_WITHSCOPEID
370                 niflags = NI_WITHSCOPEID;
371 #endif
372
373                 memset(&sin6, 0, sizeof(sin6));
374                 memcpy(&sin6, sa, sa->sa_len);
375                 sin6.sin6_len = sizeof(struct sockaddr_in6);
376                 sin6.sin6_family = AF_INET6;
377 #ifdef __KAME__
378                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
379                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
380                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
381                     sin6.sin6_scope_id == 0) {
382                         sin6.sin6_scope_id =
383                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
384                         sin6.sin6_addr.s6_addr[2] = 0;
385                         sin6.sin6_addr.s6_addr[3] = 0;
386                 }
387 #endif
388                 if (nflag)
389                         niflags |= NI_NUMERICHOST;
390                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
391                     line, sizeof(line), NULL, 0, niflags) != 0)
392                         strncpy(line, "invalid", sizeof(line));
393
394                 return(line);
395         }
396 #endif
397
398         case AF_LINK:
399                 return(link_ntoa((struct sockaddr_dl *)sa));
400
401         default:
402             {
403                 /*
404                  * Unknown address family; just render the raw
405                  * data in sa->sa_data as hex values.
406                  */
407                 uint8_t *sp = (uint8_t *)sa->sa_data;
408                 uint8_t *splim = (uint8_t *)sa + sa->sa_len;
409                 char *cps = line + sprintf(line, "(%d)", sa->sa_family);
410                 char *cpe = line + sizeof(line);
411
412                 while (sp < splim && cps < cpe)
413                         cps += snprintf(cps, cpe - cps, " %02x", *sp++);
414                 break;
415             }
416         }
417         return(line);
418 }
419
420 /*
421  * Return the name of the network whose address is given.
422  * The address is assumed to be that of a net or subnet, not a host.
423  */
424 char *
425 netname(struct sockaddr *sa)
426 {
427         const char *cp = NULL;
428         static char line[MAXHOSTNAMELEN + 1];
429         struct netent *np = NULL;
430         u_long net, mask;
431         u_long i;
432         int subnetshift;
433
434         switch (sa->sa_family) {
435
436         case AF_INET:
437             {   struct in_addr in;
438                 in = ((struct sockaddr_in *)sa)->sin_addr;
439
440                 i = in.s_addr = ntohl(in.s_addr);
441                 if (in.s_addr == 0)
442                         cp = "default";
443                 else if (!nflag) {
444                         if (IN_CLASSA(i)) {
445                                 mask = IN_CLASSA_NET;
446                                 subnetshift = 8;
447                         } else if (IN_CLASSB(i)) {
448                                 mask = IN_CLASSB_NET;
449                                 subnetshift = 8;
450                         } else {
451                                 mask = IN_CLASSC_NET;
452                                 subnetshift = 4;
453                         }
454                         /*
455                          * If there are more bits than the standard mask
456                          * would suggest, subnets must be in use.
457                          * Guess at the subnet mask, assuming reasonable
458                          * width subnet fields.
459                          */
460                         while (in.s_addr &~ mask)
461                                 mask |= mask >> subnetshift;
462                         net = in.s_addr & mask;
463                         while ((mask & 1) == 0)
464                                 mask >>= 1, net >>= 1;
465                         np = getnetbyaddr(net, AF_INET);
466                         if (np != NULL)
467                                 cp = np->n_name;
468                 }
469 #define C(x)    (unsigned)((x) & 0xff)
470                 if (cp != NULL)
471                         strncpy(line, cp, sizeof(line));
472                 else if ((in.s_addr & 0xffffff) == 0)
473                         sprintf(line, "%u", C(in.s_addr >> 24));
474                 else if ((in.s_addr & 0xffff) == 0)
475                         sprintf(line, "%u.%u", C(in.s_addr >> 24),
476                             C(in.s_addr >> 16));
477                 else if ((in.s_addr & 0xff) == 0)
478                         sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
479                             C(in.s_addr >> 16), C(in.s_addr >> 8));
480                 else
481                         sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
482                             C(in.s_addr >> 16), C(in.s_addr >> 8),
483                             C(in.s_addr));
484 #undef C
485                 break;
486             }
487
488 #ifdef INET6
489         case AF_INET6:
490         {
491                 struct sockaddr_in6 sin6; /* use static var for safety */
492                 int niflags = 0;
493 #ifdef NI_WITHSCOPEID
494                 niflags = NI_WITHSCOPEID;
495 #endif
496
497                 memset(&sin6, 0, sizeof(sin6));
498                 memcpy(&sin6, sa, sa->sa_len);
499                 sin6.sin6_len = sizeof(struct sockaddr_in6);
500                 sin6.sin6_family = AF_INET6;
501 #ifdef __KAME__
502                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
503                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
504                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
505                     sin6.sin6_scope_id == 0) {
506                         sin6.sin6_scope_id =
507                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
508                         sin6.sin6_addr.s6_addr[2] = 0;
509                         sin6.sin6_addr.s6_addr[3] = 0;
510                 }
511 #endif
512                 if (nflag)
513                         niflags |= NI_NUMERICHOST;
514                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
515                     line, sizeof(line), NULL, 0, niflags) != 0)
516                         strncpy(line, "invalid", sizeof(line));
517
518                 return(line);
519         }
520 #endif
521
522         case AF_LINK:
523                 return(link_ntoa((struct sockaddr_dl *)sa));
524
525
526         default:
527             {
528                 /*
529                  * Unknown address family; just render the raw
530                  * data in sa->sa_data as hex values.
531                  */
532                 uint8_t *sp = (uint8_t *)sa->sa_data;
533                 uint8_t *splim = (uint8_t *)sa + sa->sa_len;
534                 char *cps = line + sprintf(line, "af %d:", sa->sa_family);
535                 char *cpe = line + sizeof(line);
536
537                 while (sp < splim && cps < cpe)
538                         cps += snprintf(cps, cpe - cps, " %02x", *sp++);
539                 break;
540             }
541         }
542         return(line);
543 }
544
545 static void
546 set_metric(char *value, int key)
547 {
548         int flag = 0;
549         u_long noval, *valp = &noval;
550
551         switch (key) {
552 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
553         caseof(K_MTU, RTV_MTU, rmx_mtu);
554         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
555         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
556         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
557         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
558         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
559         caseof(K_RTT, RTV_RTT, rmx_rtt);
560         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
561         caseof(K_MSL, RTV_MSL, rmx_msl);
562         caseof(K_IWMAX, RTV_IWMAXSEGS, rmx_iwmaxsegs);
563         caseof(K_IW, RTV_IWCAPSEGS, rmx_iwcapsegs);
564         }
565         rtm_inits |= flag;
566         if (lockrest || locking)
567                 rt_metrics.rmx_locks |= flag;
568         if (locking)
569                 locking = 0;
570         *valp = atoi(value);
571 }
572
573 static void
574 newroute(int argc, char **argv)
575 {
576         char *cmd;
577         const char *err_str, *dest = "", *gateway = "";
578         int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
579         int key;
580         struct hostent *hp = NULL;
581
582         if (uid != 0) {
583                 errx(EX_NOPERM, "must be root to alter routing table");
584         }
585         cmd = argv[0];
586         if (*cmd != 'g')
587                 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
588         while (--argc > 0) {
589                 if (**(++argv)== '-') {
590                         switch (key = keyword(1 + *argv)) {
591                         case K_LINK:
592                                 af = AF_LINK;
593                                 aflen = sizeof(struct sockaddr_dl);
594                                 break;
595                         case K_INET:
596                                 af = AF_INET;
597                                 aflen = sizeof(struct sockaddr_in);
598                                 break;
599 #ifdef INET6
600                         case K_INET6:
601                                 af = AF_INET6;
602                                 aflen = sizeof(struct sockaddr_in6);
603                                 break;
604 #endif
605                         case K_SA:
606                                 af = PF_ROUTE;
607                                 aflen = sizeof(union sockunion);
608                                 break;
609                         case K_IFACE:
610                         case K_INTERFACE:
611                                 iflag++;
612                                 break;
613                         case K_NOSTATIC:
614                                 flags &= ~RTF_STATIC;
615                                 break;
616                         case K_LLINFO:
617                                 flags |= RTF_LLINFO;
618                                 break;
619                         case K_LOCK:
620                                 locking = 1;
621                                 break;
622                         case K_LOCKREST:
623                                 lockrest = 1;
624                                 break;
625                         case K_HOST:
626                                 forcehost++;
627                                 break;
628                         case K_REJECT:
629                                 flags |= RTF_REJECT;
630                                 break;
631                         case K_BLACKHOLE:
632                                 flags |= RTF_BLACKHOLE;
633                                 break;
634                         case K_PROTO1:
635                                 flags |= RTF_PROTO1;
636                                 break;
637                         case K_PROTO2:
638                                 flags |= RTF_PROTO2;
639                                 break;
640                         case K_PROXY:
641                                 proxy = 1;
642                                 break;
643                         case K_CLONING:
644                                 flags |= RTF_CLONING;
645                                 break;
646                         case K_XRESOLVE:
647                                 flags |= RTF_XRESOLVE;
648                                 break;
649                         case K_STATIC:
650                                 flags |= RTF_STATIC;
651                                 break;
652                         case K_IFA:
653                                 if (--argc == 0)
654                                         usage(NULL);
655                                 getaddr(RTA_IFA, *++argv, 0);
656                                 break;
657                         case K_IFP:
658                                 if (--argc == 0)
659                                         usage(NULL);
660                                 getaddr(RTA_IFP, *++argv, 0);
661                                 break;
662                         case K_GENMASK:
663                                 if (--argc == 0)
664                                         usage(NULL);
665                                 getaddr(RTA_GENMASK, *++argv, 0);
666                                 break;
667                         case K_GATEWAY:
668                                 if (--argc == 0)
669                                         usage(NULL);
670                                 getaddr(RTA_GATEWAY, *++argv, 0);
671                                 break;
672                         case K_DST:
673                                 if (--argc == 0)
674                                         usage(NULL);
675                                 ishost = getaddr(RTA_DST, *++argv, &hp);
676                                 dest = *argv;
677                                 break;
678                         case K_NETMASK:
679                                 if (--argc == 0)
680                                         usage(NULL);
681                                 getaddr(RTA_NETMASK, *++argv, 0);
682                                 /* FALLTHROUGH */
683                         case K_NET:
684                                 forcenet++;
685                                 break;
686                         case K_PREFIXLEN:
687                                 if (--argc == 0)
688                                         usage(NULL);
689                                 if (prefixlen(*++argv) == -1) {
690                                         forcenet = 0;
691                                         ishost = 1;
692                                 } else {
693                                         forcenet = 1;
694                                         ishost = 0;
695                                 }
696                                 break;
697                         case K_MPLS:
698                                 af = AF_MPLS;
699                                 aflen = sizeof(struct sockaddr_mpls);
700                                 break;
701                         case K_POP:
702                                 flags |= RTF_MPLSOPS;
703                                 af = AF_MPLS;
704                                 mplsop = MPLSLOP_POP;
705                                 switch(++popcount){
706                                         case 1:
707                                                 getaddr(RTA_MPLS1, "", 0);
708                                                 break;
709                                         case 2:
710                                                 getaddr(RTA_MPLS2, "", 0);
711                                                 break;
712                                         case 3:
713                                                 getaddr(RTA_MPLS3, "", 0);
714                                                 break;
715                                 }
716                                 break;
717                         case K_PUSH:
718                         case K_SWAP:
719                                 if (popcount > 0) {
720                                         warnx("Push or swap after pop. Ignoring.");
721                                         break;
722                                 }
723                                 if (key == K_PUSH) {
724                                         mplsop = MPLSLOP_PUSH;
725                                         ++pushcount;
726                                 } else {
727                                         if (pushcount > 0) {
728                                                 warnx("Swap after push. Ignoring.");
729                                                 break;
730                                         }
731                                         if (swapcount > 0) {
732                                                 warnx("Too many swaps. Ignoring.");
733                                                 break;
734                                         }
735                                         mplsop = MPLSLOP_SWAP;
736                                         ++swapcount;
737                                 }
738                                 flags |= RTF_MPLSOPS;
739                                 af = AF_MPLS;
740                                 aflen = sizeof(struct sockaddr_mpls);
741                                 if (--argc == 0)
742                                         usage(NULL);
743                                 switch(pushcount + swapcount){
744                                         case 1:
745                                                 getaddr(RTA_MPLS1, *++argv, 0);
746                                                 break;
747                                         case 2:
748                                                 getaddr(RTA_MPLS2, *++argv, 0);
749                                                 break;
750                                         case 3:
751                                                 getaddr(RTA_MPLS3, *++argv, 0);
752                                                 break;
753                                 }
754                                 break;
755                         case K_MTU:
756                         case K_HOPCOUNT:
757                         case K_EXPIRE:
758                         case K_RECVPIPE:
759                         case K_SENDPIPE:
760                         case K_SSTHRESH:
761                         case K_RTT:
762                         case K_RTTVAR:
763                         case K_MSL:
764                         case K_IWMAX:
765                         case K_IW:
766                                 if (--argc == 0)
767                                         usage(NULL);
768                                 set_metric(*++argv, key);
769                                 break;
770                         default:
771                                 usage(1+*argv);
772                         }
773                 } else {
774                         if ((rtm_addrs & RTA_DST) == 0) {
775                                 dest = *argv;
776                                 ishost = getaddr(RTA_DST, *argv, &hp);
777                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
778                                 gateway = *argv;
779                                 getaddr(RTA_GATEWAY, *argv, &hp);
780                         } else {
781                                 getaddr(RTA_NETMASK, *argv, 0);
782                                 forcenet = 1;
783                         }
784                 }
785         }
786         if (forcehost) {
787                 ishost = 1;
788 #ifdef INET6
789                 if (af == AF_INET6) {
790                         rtm_addrs &= ~RTA_NETMASK;
791                         memset((void *)&so_mask, 0, sizeof(so_mask));
792                 }
793 #endif
794         }
795         if (forcenet)
796                 ishost = 0;
797         flags |= RTF_UP;
798         if (ishost)
799                 flags |= RTF_HOST;
800         if (iflag == 0)
801                 flags |= RTF_GATEWAY;
802         if (proxy) {
803                 so_dst.sinarp.sin_other = SIN_PROXY;
804                 flags |= RTF_ANNOUNCE;
805         }
806         for (attempts = 1; ; attempts++) {
807                 errno = 0;
808                 if ((ret = rtmsg(*cmd, flags)) == 0)
809                         break;
810                 if (errno != ENETUNREACH && errno != ESRCH)
811                         break;
812                 if (af == AF_INET && *gateway != '\0' &&
813                     hp != NULL && hp->h_addr_list[1] != NULL) {
814                         hp->h_addr_list++;
815                         memmove(&so_gate.sin.sin_addr,
816                                 hp->h_addr_list[0],
817                                 MIN((size_t)hp->h_length,
818                                     sizeof(so_gate.sin.sin_addr)));
819                 } else
820                         break;
821         }
822         if (*cmd == 'g')
823                 exit(0);
824         if (!qflag) {
825                 oerrno = errno;
826                 printf("%s %s %s", cmd, ishost? "host" : "net", dest);
827                 if (*gateway != '\0') {
828                         printf(": gateway %s", gateway);
829                         if (attempts > 1 && ret == 0 && af == AF_INET)
830                             printf(" (%s)",
831                                 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
832                 }
833                 if (ret == 0) {
834                         printf("\n");
835                 } else {
836                         switch (oerrno) {
837                         case ESRCH:
838                                 err_str = "not in table";
839                                 break;
840                         case EBUSY:
841                                 err_str = "entry in use";
842                                 break;
843                         case ENOBUFS:
844                                 err_str = "routing table overflow";
845                                 break;
846                         case EDQUOT: /* handle recursion avoidance in
847                                         rt_setgate() */
848                                 err_str = "gateway uses the same route";
849                                 break;
850                         default:
851                                 err_str = strerror(oerrno);
852                                 break;
853                         }
854                         printf(": %s\n", err_str);
855                 }
856         }
857         exit(ret != 0);
858 }
859
860 static void
861 inet_makenetandmask(u_long net, struct sockaddr_in *in, u_long bits)
862 {
863         u_long addr, mask = 0;
864         char *cp;
865
866         rtm_addrs |= RTA_NETMASK;
867         /*
868          * XXX: This approach unable to handle 0.0.0.1/32 correctly
869          * as inet_network() converts 0.0.0.1 and 1 equally.
870          */
871         if (net <= 0xff)
872                 addr = net << IN_CLASSA_NSHIFT;
873         else if (net <= 0xffff)
874                 addr = net << IN_CLASSB_NSHIFT;
875         else if (net <= 0xffffff)
876                 addr = net << IN_CLASSC_NSHIFT;
877         else
878                 addr = net;
879
880         if (bits != 0)
881                 mask = 0xffffffff << (32 - bits);
882         else if (net == 0)
883                 mask = 0;
884         else if (IN_CLASSA(addr))
885                 mask = IN_CLASSA_NET;
886         else if (IN_CLASSB(addr))
887                 mask = IN_CLASSB_NET;
888         else if (IN_CLASSC(addr))
889                 mask = IN_CLASSC_NET;
890         else if (IN_MULTICAST(addr))
891                 mask = IN_CLASSD_NET;
892         else
893                 mask = 0xffffffff;
894
895         in->sin_addr.s_addr = htonl(addr);
896         in = &so_mask.sin;
897         in->sin_addr.s_addr = htonl(mask);
898         in->sin_len = 0;
899         in->sin_family = 0;
900         cp = (char *)(&in->sin_addr + 1);
901         while (*--cp == 0 && cp > (char *)in)
902                 ;
903         in->sin_len = 1 + cp - (char *)in;
904 }
905
906 #ifdef INET6
907 /*
908  * XXX the function may need more improvement...
909  */
910 static int
911 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
912 {
913         struct in6_addr in6;
914
915         if (plen == NULL) {
916                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
917                     sin6->sin6_scope_id == 0) {
918                         plen = "0";
919                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
920                         /* aggregatable global unicast - RFC2374 */
921                         memset(&in6, 0, sizeof(in6));
922                         if (memcmp(&sin6->sin6_addr.s6_addr[8],
923                                    &in6.s6_addr[8], 8) == 0)
924                                 plen = "64";
925                 }
926         }
927
928         if (plen == NULL || strcmp(plen, "128") == 0)
929                 return(1);
930         rtm_addrs |= RTA_NETMASK;
931         prefixlen(plen);
932         return(0);
933 }
934 #endif
935
936 /*
937  * Interpret an argument as a network address of some kind,
938  * returning 1 if a host address, 0 if a network address.
939  */
940 static int
941 getaddr(int which, const char *str, struct hostent **hpp)
942 {
943         sup su;
944         struct hostent *hp;
945         struct netent *np;
946         u_long val;
947         char *q;
948         int afamily;  /* local copy of af so we can change it */
949
950         if (af == 0) {
951                 af = AF_INET;
952                 aflen = sizeof(struct sockaddr_in);
953         }
954         afamily = af;
955         rtm_addrs |= which;
956         switch (which) {
957         case RTA_DST:
958                 su = &so_dst;
959                 break;
960         case RTA_GATEWAY:
961                 su = &so_gate;
962                 if (iflag) {
963                         struct ifaddrs *ifap, *ifa;
964                         struct sockaddr_dl *sdl = NULL;
965
966                         if (getifaddrs(&ifap))
967                                 err(1, "getifaddrs");
968
969                         for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
970                                 if (ifa->ifa_addr->sa_family != AF_LINK)
971                                         continue;
972
973                                 if (strcmp(str, ifa->ifa_name) != 0)
974                                         continue;
975
976                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
977                         }
978                         /* If we found it, then use it */
979                         if (sdl != NULL) {
980                                 /*
981                                  * Copy is safe since we have a
982                                  * sockaddr_storage member in sockunion{}.
983                                  * Note that we need to copy before calling
984                                  * freeifaddrs().
985                                  *
986                                  * Interface routes are routed only by their
987                                  * sdl_index or interface name (we provide
988                                  * both here), not by the ARP address of the
989                                  * local interface (alen, slen = 0).
990                                  */
991                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
992                                 su->sdl.sdl_alen = 0;
993                                 su->sdl.sdl_slen = 0;
994                         }
995                         freeifaddrs(ifap);
996                         if (sdl != NULL)
997                                 return(1);
998                 }
999                 break;
1000         case RTA_NETMASK:
1001                 su = &so_mask;
1002                 break;
1003         case RTA_GENMASK:
1004                 su = &so_genmask;
1005                 break;
1006         case RTA_IFP:
1007                 su = &so_ifp;
1008                 afamily = AF_LINK;
1009                 break;
1010         case RTA_IFA:
1011                 su = &so_ifa;
1012                 break;
1013         case RTA_MPLS1:
1014                 su = &so_mpls1;
1015                 break;
1016         case RTA_MPLS2:
1017                 su = &so_mpls2;
1018                 break;
1019         case RTA_MPLS3:
1020                 su = &so_mpls3;
1021                 break;
1022         default:
1023                 usage("internal error");
1024                 /*NOTREACHED*/
1025         }
1026         su->sa.sa_len = aflen;
1027         su->sa.sa_family = afamily; /* cases that don't want it have left
1028                                        already */
1029         if (strcmp(str, "default") == 0) {
1030                 /*
1031                  * Default is net 0.0.0.0/0
1032                  */
1033                 switch (which) {
1034                 case RTA_DST:
1035                         forcenet++;
1036                         /* bzero(su, sizeof(*su)); *//* for readability */
1037                         getaddr(RTA_NETMASK, str, 0);
1038                         break;
1039                 case RTA_NETMASK:
1040                 case RTA_GENMASK:
1041                         /* bzero(su, sizeof(*su)); *//* for readability */
1042                         break;
1043                 }
1044                 return(0);
1045         }
1046         switch (afamily) {
1047 #ifdef INET6
1048         case AF_INET6:
1049         {
1050                 struct addrinfo hints, *res;
1051
1052                 q = NULL;
1053                 if (which == RTA_DST && (q = strchr(str, '/')) != NULL)
1054                         *q = '\0';
1055                 memset(&hints, 0, sizeof(hints));
1056                 hints.ai_family = afamily;      /*AF_INET6*/
1057                 hints.ai_flags = AI_NUMERICHOST;
1058                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
1059                 if (getaddrinfo(str, "0", &hints, &res) != 0 ||
1060                     res->ai_family != AF_INET6 ||
1061                     res->ai_addrlen != sizeof(su->sin6)) {
1062                         fprintf(stderr, "%s: bad value\n", str);
1063                         exit(1);
1064                 }
1065                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
1066 #ifdef __KAME__
1067                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
1068                      IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) &&
1069                     su->sin6.sin6_scope_id) {
1070                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1071                                 htons(su->sin6.sin6_scope_id);
1072                         su->sin6.sin6_scope_id = 0;
1073                 }
1074 #endif
1075                 freeaddrinfo(res);
1076                 if (q != NULL)
1077                         *q++ = '/';
1078                 if (which == RTA_DST)
1079                         return(inet6_makenetandmask(&su->sin6, q));
1080                 return(0);
1081         }
1082 #endif /* INET6 */
1083
1084         case AF_LINK:
1085                 link_addr(str, &su->sdl);
1086                 return(1);
1087
1088         case PF_ROUTE:
1089                 su->sa.sa_len = sizeof(*su);
1090                 sockaddr(str, &su->sa);
1091                 return(1);
1092
1093         case AF_MPLS:
1094         {
1095                 mpls_label_t label;
1096
1097                 bzero(su, sizeof(*su));
1098                 su->sa.sa_len = sizeof(*su);
1099                 su->sa.sa_family = AF_MPLS;
1100                 su->smpls.smpls_op = mplsop;
1101                 if (mplsop != MPLSLOP_POP && mplsop != MPLSLOP_POPALL &&
1102                     *str != '\0') {
1103                         if (sscanf(str, "%u", &label) != 1)
1104                                 errx(EX_NOHOST, "bad address: %s", str);
1105                         su->smpls.smpls_label = htonl(label);
1106                 }
1107                 return(1);
1108         }
1109
1110         case AF_INET:
1111         default:
1112                 break;
1113         }
1114
1115         if (hpp == NULL)
1116                 hpp = &hp;
1117         *hpp = NULL;
1118
1119         q = strchr(str,'/');
1120         if (q != NULL && which == RTA_DST) {
1121                 *q = '\0';
1122                 if ((val = inet_network(str)) != INADDR_NONE) {
1123                         inet_makenetandmask(
1124                                 val, &su->sin, strtoul(q+1, 0, 0));
1125                         return(0);
1126                 }
1127                 *q = '/';
1128         }
1129         if ((which != RTA_DST || forcenet == 0) &&
1130             inet_aton(str, &su->sin.sin_addr)) {
1131                 val = su->sin.sin_addr.s_addr;
1132                 if (which != RTA_DST ||
1133                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1134                         return(1);
1135                 else {
1136                         val = ntohl(val);
1137                         goto netdone;
1138                 }
1139         }
1140         if (which == RTA_DST && forcehost == 0 &&
1141             ((val = inet_network(str)) != INADDR_NONE ||
1142             ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) {
1143 netdone:
1144                 inet_makenetandmask(val, &su->sin, 0);
1145                 return(0);
1146         }
1147         hp = gethostbyname(str);
1148         if (hp != NULL) {
1149                 *hpp = hp;
1150                 su->sin.sin_family = hp->h_addrtype;
1151                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1152                     MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr)));
1153                 return(1);
1154         }
1155         errx(EX_NOHOST, "bad address: %s", str);
1156 }
1157
1158 static int
1159 prefixlen(const char *len_str)
1160 {
1161         int len = atoi(len_str), q, r;
1162         int max;
1163         char *p;
1164
1165         rtm_addrs |= RTA_NETMASK;       
1166         switch (af) {
1167 #ifdef INET6
1168         case AF_INET6:
1169                 max = 128;
1170                 p = (char *)&so_mask.sin6.sin6_addr;
1171                 break;
1172 #endif
1173         case AF_INET:
1174                 max = 32;
1175                 p = (char *)&so_mask.sin.sin_addr;
1176                 break;
1177         default:
1178                 fprintf(stderr, "prefixlen not supported in this af\n");
1179                 exit(1);
1180                 /*NOTREACHED*/
1181         }
1182
1183         if (len < 0 || max < len) {
1184                 fprintf(stderr, "%s: bad value\n", len_str);
1185                 exit(1);
1186         }
1187         
1188         q = len >> 3;
1189         r = len & 7;
1190         so_mask.sa.sa_family = af;
1191         so_mask.sa.sa_len = aflen;
1192         memset((void *)p, 0, max / 8);
1193         if (q > 0)
1194                 memset((void *)p, 0xff, q);
1195         if (r > 0)
1196                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1197         if (len == max)
1198                 return(-1);
1199         else
1200                 return(len);
1201 }
1202
1203 static void
1204 interfaces(void)
1205 {
1206         size_t needed;
1207         int mib[6];
1208         char *buf, *lim, *next;
1209         struct rt_msghdr *rtm;
1210
1211         mib[0] = CTL_NET;
1212         mib[1] = PF_ROUTE;
1213         mib[2] = 0;             /* protocol */
1214         mib[3] = 0;             /* wildcard address family */
1215         mib[4] = NET_RT_IFLIST;
1216         mib[5] = 0;             /* no flags */
1217         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1218                 err(EX_OSERR, "route-sysctl-estimate");
1219         if ((buf = malloc(needed)) == NULL)
1220                 errx(EX_OSERR, "malloc failed");
1221         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1222                 err(EX_OSERR, "actual retrieval of interface table");
1223         lim = buf + needed;
1224         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1225                 rtm = (struct rt_msghdr *)next;
1226                 print_rtmsg(rtm, rtm->rtm_msglen);
1227         }
1228 }
1229
1230 static void
1231 monitor(void)
1232 {
1233         int n;
1234         char msg[2048];
1235
1236         verbose = 1;
1237         if (debugonly) {
1238                 interfaces();
1239                 exit(0);
1240         }
1241         for (;;) {
1242                 time_t now;
1243                 n = read(s, msg, 2048);
1244                 now = time(NULL);
1245                 printf("\ngot message of size %d on %s", n, ctime(&now));
1246                 print_rtmsg((struct rt_msghdr *)msg, n);
1247         }
1248 }
1249
1250 struct {
1251         struct  rt_msghdr m_rtm;
1252         char    m_space[512];
1253 } m_rtmsg;
1254
1255 static int
1256 rtmsg(int cmd, int flags)
1257 {
1258         static int seq;
1259         int rlen;
1260         char *cp = m_rtmsg.m_space;
1261         int l;
1262
1263 #define NEXTADDR(w, u) \
1264         if (rtm_addrs & (w)) {\
1265             l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\
1266             if (verbose) sodump(&(u),"u");\
1267         }
1268
1269         errno = 0;
1270         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1271         if (cmd == 'a')
1272                 cmd = RTM_ADD;
1273         else if (cmd == 'c')
1274                 cmd = RTM_CHANGE;
1275         else if (cmd == 'g') {
1276                 cmd = RTM_GET;
1277                 if (so_ifp.sa.sa_family == 0) {
1278                         so_ifp.sa.sa_family = AF_LINK;
1279                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1280                         rtm_addrs |= RTA_IFP;
1281                 }
1282         } else
1283                 cmd = RTM_DELETE;
1284 #define rtm m_rtmsg.m_rtm
1285         rtm.rtm_type = cmd;
1286         rtm.rtm_flags = flags;
1287         rtm.rtm_version = RTM_VERSION;
1288         rtm.rtm_seq = ++seq;
1289         rtm.rtm_addrs = rtm_addrs;
1290         rtm.rtm_rmx = rt_metrics;
1291         rtm.rtm_inits = rtm_inits;
1292
1293         if (rtm_addrs & RTA_NETMASK)
1294                 mask_addr();
1295         NEXTADDR(RTA_DST, so_dst);
1296         NEXTADDR(RTA_GATEWAY, so_gate);
1297         NEXTADDR(RTA_NETMASK, so_mask);
1298         NEXTADDR(RTA_GENMASK, so_genmask);
1299         NEXTADDR(RTA_IFP, so_ifp);
1300         NEXTADDR(RTA_IFA, so_ifa);
1301         NEXTADDR(RTA_MPLS1, so_mpls1);
1302         NEXTADDR(RTA_MPLS2, so_mpls2);
1303         NEXTADDR(RTA_MPLS3, so_mpls3);
1304         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1305         if (verbose)
1306                 print_rtmsg(&rtm, l);
1307         if (debugonly)
1308                 return(0);
1309         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1310                 warn("writing to routing socket");
1311                 return(-1);
1312         }
1313         if (cmd == RTM_GET) {
1314                 do {
1315                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1316                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1317                 if (l < 0)
1318                         warn("read from routing socket");
1319                 else
1320                         print_getmsg(&rtm, l);
1321         }
1322 #undef rtm
1323         return(0);
1324 }
1325
1326 static void
1327 mask_addr(void)
1328 {
1329         int olen = so_mask.sa.sa_len;
1330         char *cp1 = olen + (char *)&so_mask, *cp2;
1331
1332         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1333                 if (*--cp1 != 0) {
1334                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1335                         break;
1336                 }
1337         if ((rtm_addrs & RTA_DST) == 0)
1338                 return;
1339         switch (so_dst.sa.sa_family) {
1340         case AF_INET:
1341 #ifdef INET6
1342         case AF_INET6:
1343 #endif
1344         case 0:
1345                 return;
1346         }
1347         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1348         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1349         while (cp2 > cp1)
1350                 *--cp2 = 0;
1351         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1352         while (cp1 > so_dst.sa.sa_data)
1353                 *--cp1 &= *--cp2;
1354 }
1355
1356 const char *msgtypes[] = {
1357         "",
1358         "RTM_ADD: Add Route",
1359         "RTM_DELETE: Delete Route",
1360         "RTM_CHANGE: Change Metrics or flags",
1361         "RTM_GET: Report Metrics",
1362         "RTM_LOSING: Kernel Suspects Partitioning",
1363         "RTM_REDIRECT: Told to use different route",
1364         "RTM_MISS: Lookup failed on this address",
1365         "RTM_LOCK: fix specified metrics",
1366         "RTM_OLDADD: caused by SIOCADDRT",
1367         "RTM_OLDDEL: caused by SIOCDELRT",
1368         "RTM_RESOLVE: Route created by cloning",
1369         "RTM_NEWADDR: address being added to iface",
1370         "RTM_DELADDR: address being removed from iface",
1371         "RTM_IFINFO: iface status change",
1372         "RTM_NEWMADDR: new multicast group membership on iface",
1373         "RTM_DELMADDR: multicast group membership removed from iface",
1374         "RTM_IFANNOUNCE: interface arrival/departure",
1375         0,
1376 };
1377
1378 char metricnames[] =
1379 "\013iw\012iwmax\011msl\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire"
1380 "\2hopcount\1mtu";
1381 char routeflags[] =
1382 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1383 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1384 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1385 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1386 char ifnetflags[] =
1387 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1388 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1389 "\017LINK2\020MULTICAST";
1390 char addrnames[] =
1391 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"
1392 "\011MPLS1\012MPLS2\013MPLS3";
1393
1394 static void
1395 print_rtmsg(struct rt_msghdr *rtm, int msglen __unused)
1396 {
1397         struct if_msghdr *ifm;
1398         struct ifa_msghdr *ifam;
1399 #ifdef RTM_NEWMADDR
1400         struct ifma_msghdr *ifmam;
1401 #endif
1402         struct if_announcemsghdr *ifan;
1403
1404         if (verbose == 0)
1405                 return;
1406         if (rtm->rtm_version != RTM_VERSION) {
1407                 printf("routing message version %d not understood\n",
1408                     rtm->rtm_version);
1409                 return;
1410         }
1411         if (msgtypes[rtm->rtm_type] != NULL)
1412                 printf("%s: ", msgtypes[rtm->rtm_type]);
1413         else
1414                 printf("#%d: ", rtm->rtm_type);
1415         printf("len %d, ", rtm->rtm_msglen);
1416         switch (rtm->rtm_type) {
1417         case RTM_IFINFO:
1418                 ifm = (struct if_msghdr *)rtm;
1419                 printf("if# %d, flags:", ifm->ifm_index);
1420                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1421                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1422                 break;
1423         case RTM_NEWADDR:
1424         case RTM_DELADDR:
1425                 ifam = (struct ifa_msghdr *)rtm;
1426                 printf("metric %d, flags:", ifam->ifam_metric);
1427                 bprintf(stdout, ifam->ifam_flags, routeflags);
1428                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1429                 break;
1430 #ifdef RTM_NEWMADDR
1431         case RTM_NEWMADDR:
1432         case RTM_DELMADDR:
1433                 ifmam = (struct ifma_msghdr *)rtm;
1434                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1435                 break;
1436 #endif
1437         case RTM_IFANNOUNCE:
1438                 ifan = (struct if_announcemsghdr *)rtm;
1439                 printf("if# %d, what: ", ifan->ifan_index);
1440                 switch (ifan->ifan_what) {
1441                 case IFAN_ARRIVAL:
1442                         printf("arrival");
1443                         break;
1444                 case IFAN_DEPARTURE:
1445                         printf("departure");
1446                         break;
1447                 default:
1448                         printf("#%d", ifan->ifan_what);
1449                         break;
1450                 }
1451                 printf("\n");
1452                 break;
1453
1454         default:
1455                 printf("pid: %ld, seq %d, errno %d, flags:",
1456                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1457                 bprintf(stdout, rtm->rtm_flags, routeflags);
1458                 pmsg_common(rtm);
1459         }
1460 }
1461
1462 static void
1463 print_getmsg(struct rt_msghdr *rtm, int msglen)
1464 {
1465         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1466         struct sockaddr_dl *ifp = NULL;
1467         struct sockaddr *sa;
1468         char *cp;
1469         int i;
1470
1471         printf("   route to: %s\n", routename(&so_dst.sa));
1472         if (rtm->rtm_version != RTM_VERSION) {
1473                 warnx("routing message version %d not understood",
1474                      rtm->rtm_version);
1475                 return;
1476         }
1477         if (rtm->rtm_msglen > msglen) {
1478                 warnx("message length mismatch, in packet %d, returned %d",
1479                       rtm->rtm_msglen, msglen);
1480         }
1481         if (rtm->rtm_errno != 0)  {
1482                 errno = rtm->rtm_errno;
1483                 warn("message indicates error %d", errno);
1484                 return;
1485         }
1486         cp = ((char *)(rtm + 1));
1487         if (rtm->rtm_addrs)
1488                 for (i = 1; i != 0; i <<= 1)
1489                         if (i & rtm->rtm_addrs) {
1490                                 sa = (struct sockaddr *)cp;
1491                                 switch (i) {
1492                                 case RTA_DST:
1493                                         dst = sa;
1494                                         break;
1495                                 case RTA_GATEWAY:
1496                                         gate = sa;
1497                                         break;
1498                                 case RTA_NETMASK:
1499                                         mask = sa;
1500                                         break;
1501                                 case RTA_IFP:
1502                                         if (sa->sa_family == AF_LINK &&
1503                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1504                                                 ifp = (struct sockaddr_dl *)sa;
1505                                         break;
1506                                 }
1507                                 ADVANCE(cp, sa);
1508                         }
1509         if (dst != NULL && mask != NULL)
1510                 mask->sa_family = dst->sa_family;       /* XXX */
1511         if (dst != NULL)
1512                 printf("destination: %s\n", routename(dst));
1513         if (mask != NULL) {
1514                 int savenflag = nflag;
1515
1516                 nflag = 1;
1517                 printf("       mask: %s\n", routename(mask));
1518                 nflag = savenflag;
1519         }
1520         if (gate != NULL && rtm->rtm_flags & RTF_GATEWAY)
1521                 printf("    gateway: %s\n", routename(gate));
1522         if (ifp != NULL)
1523                 printf("  interface: %.*s\n",
1524                     ifp->sdl_nlen, ifp->sdl_data);
1525         printf("      flags: ");
1526         bprintf(stdout, rtm->rtm_flags, routeflags);
1527
1528 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1529 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1530
1531         printf("\n%s\n", "\
1532  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire  msl,msec iwmax iw");
1533         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1534         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1535         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1536         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1537         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1538         printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1539         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1540         if (rtm->rtm_rmx.rmx_expire != 0) {
1541                 struct timespec sp;
1542                 clock_gettime(CLOCK_MONOTONIC, &sp);
1543                 rtm->rtm_rmx.rmx_expire -= sp.tv_sec;
1544         }
1545         printf("%8ld%c ", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1546         printf("%8ld ", rtm->rtm_rmx.rmx_msl);
1547         printf("%5ld ", rtm->rtm_rmx.rmx_iwmaxsegs);
1548         printf("%3ld\n", rtm->rtm_rmx.rmx_iwcapsegs);
1549 #undef lock
1550 #undef msec
1551 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1552         if (verbose)
1553                 pmsg_common(rtm);
1554         else if (rtm->rtm_addrs &~ RTA_IGN) {
1555                 printf("sockaddrs: ");
1556                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1557                 putchar('\n');
1558         }
1559 #undef  RTA_IGN
1560 }
1561
1562 static void
1563 pmsg_common(struct rt_msghdr *rtm)
1564 {
1565         printf("\nlocks: ");
1566         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1567         printf(" inits: ");
1568         bprintf(stdout, rtm->rtm_inits, metricnames);
1569         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1570 }
1571
1572 static void
1573 pmsg_addrs(char *cp, int addrs)
1574 {
1575         struct sockaddr *sa;
1576         int i;
1577
1578         if (addrs == 0) {
1579                 putchar('\n');
1580                 return;
1581         }
1582         printf("\nsockaddrs: ");
1583         bprintf(stdout, addrs, addrnames);
1584         putchar('\n');
1585         for (i = 1; i != 0; i <<= 1)
1586                 if (i & addrs) {
1587                         sa = (struct sockaddr *)cp;
1588                         printf(" %s", routename(sa));
1589                         ADVANCE(cp, sa);
1590                 }
1591         putchar('\n');
1592         fflush(stdout);
1593 }
1594
1595 static void
1596 bprintf(FILE *fp, int b, u_char *str)
1597 {
1598         int i;
1599         int gotsome = 0;
1600
1601         if (b == 0)
1602                 return;
1603         while ((i = *str++) != 0) {
1604                 if (b & (1 << (i-1))) {
1605                         if (!gotsome)
1606                                 i = '<';
1607                         else
1608                                 i = ',';
1609                         putc(i, fp);
1610                         gotsome = 1;
1611                         for (; (i = *str) > 32; str++)
1612                                 putc(i, fp);
1613                 } else
1614                         while (*str > 32)
1615                                 str++;
1616         }
1617         if (gotsome)
1618                 putc('>', fp);
1619 }
1620
1621 int
1622 keyword(const char *cp)
1623 {
1624         struct keytab *kt = keywords;
1625
1626         while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
1627                 kt++;
1628         return(kt->kt_i);
1629 }
1630
1631 static void
1632 sodump(sup su, const char *which)
1633 {
1634         switch (su->sa.sa_family) {
1635         case AF_LINK:
1636                 printf("%s: link %s; ",
1637                     which, link_ntoa(&su->sdl));
1638                 break;
1639         case AF_INET:
1640                 printf("%s: inet %s; ",
1641                     which, inet_ntoa(su->sin.sin_addr));
1642                 break;
1643         }
1644         fflush(stdout);
1645 }
1646
1647 /* States*/
1648 #define VIRGIN  0
1649 #define GOTONE  1
1650 #define GOTTWO  2
1651 /* Inputs */
1652 #define DIGIT   (4*0)
1653 #define END     (4*1)
1654 #define DELIM   (4*2)
1655
1656 static void
1657 sockaddr(const char *addr, struct sockaddr *sa)
1658 {
1659         char *cp = (char *)sa;
1660         int size = sa->sa_len;
1661         char *cplim = cp + size;
1662         int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1663
1664         memset(cp, 0, size);
1665         cp++;
1666         do {
1667                 if ((*addr >= '0') && (*addr <= '9')) {
1668                         new = *addr - '0';
1669                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1670                         new = *addr - 'a' + 10;
1671                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1672                         new = *addr - 'A' + 10;
1673                 } else if (*addr == '\0')
1674                         state |= END;
1675                 else
1676                         state |= DELIM;
1677                 addr++;
1678                 switch (state /* | INPUT */) {
1679                 case GOTTWO | DIGIT:
1680                         *cp++ = byte; /*FALLTHROUGH*/
1681                 case VIRGIN | DIGIT:
1682                         state = GOTONE; byte = new; continue;
1683                 case GOTONE | DIGIT:
1684                         state = GOTTWO; byte = new + (byte << 4); continue;
1685                 default: /* | DELIM */
1686                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1687                 case GOTONE | END:
1688                 case GOTTWO | END:
1689                         *cp++ = byte; /* FALLTHROUGH */
1690                 case VIRGIN | END:
1691                         break;
1692                 }
1693                 break;
1694         } while (cp < cplim);
1695         sa->sa_len = cp - (char *)sa;
1696 }