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  * 4. 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
  30 #ifndef lint
  31 static const char copyright[] =
  32 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\
  33         The Regents of the University of California.  All rights reserved.\n";
  34 #endif /* not lint */
  35
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)route.c     8.6 (Berkeley) 4/28/95";
  39 #endif
  40 static const char rcsid[] =
  41   "$FreeBSD$";
  42 #endif /* not lint */
  43
  44 #include <sys/param.h>
  45 #include <sys/file.h>
  46 #include <sys/socket.h>
  47 #include <sys/ioctl.h>
  48 #include <sys/sysctl.h>
  49 #include <sys/types.h>
  50
  51 #include <net/if.h>
  52 #include <net/route.h>
  53 #include <net/if_dl.h>
  54 #include <netinet/in.h>
  55 #include <netinet/if_ether.h>
  56 #include <netatalk/at.h>
  57 #include <arpa/inet.h>
  58 #include <netdb.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 struct keytab {
  72         char    *kt_cp;
  73         int     kt_i;
  74 } keywords[] = {
  75 #include "keywords.h"
  76         {0, 0}
  77 };
  78
  79 struct  ortentry route;
  80 union   sockunion {
  81         struct  sockaddr sa;
  82         struct  sockaddr_in sin;
  83 #ifdef INET6
  84         struct  sockaddr_in6 sin6;
  85 #endif
  86         struct  sockaddr_at sat;
  87         struct  sockaddr_dl sdl;
  88         struct  sockaddr_inarp sinarp;
  89         struct  sockaddr_storage ss; /* added to avoid memory overrun */
  90 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
  91
  92 typedef union sockunion *sup;
  93 int     pid, rtm_addrs;
  94 int     s;
  95 int     forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword();
  96 int     iflag, verbose, aflen = sizeof (struct sockaddr_in);
  97 int     locking, lockrest, debugonly;
  98 struct  rt_metrics rt_metrics;
  99 u_long  rtm_inits;
 100 uid_t   uid;
 101 int     atalk_aton(const char *, struct at_addr *);
 102 char    *atalk_ntoa(struct at_addr);
 103 const char      *routename(), *netname();
 104 void    flushroutes(), newroute(), monitor(), sockaddr(), sodump(), bprintf();
 105 void    print_getmsg(), print_rtmsg(), pmsg_common(), pmsg_addrs(), mask_addr();
 106 #ifdef INET6
 107 static int inet6_makenetandmask(struct sockaddr_in6 *, char *);
 108 #endif
 109 int     getaddr(), rtmsg(), x25_makemask();
 110 int     prefixlen();
 111 extern  char *iso_ntoa();
 112
 113 void usage(const char *) __dead2;
 114
 115 void
 116 usage(cp)
 117         const char *cp;
 118 {
 119         if (cp)
 120                 warnx("bad keyword: %s", cp);
 121         (void) fprintf(stderr,
 122             "usage: route [-dnqtv] command [[modifiers] args]\n");
 123         exit(EX_USAGE);
 124         /* NOTREACHED */
 125 }
 126
 127 int
 128 main(argc, argv)
 129         int argc;
 130         char **argv;
 131 {
 132         int ch;
 133
 134         if (argc < 2)
 135                 usage((char *)NULL);
 136
 137         while ((ch = getopt(argc, argv, "nqdtv")) != -1)
 138                 switch(ch) {
 139                 case 'n':
 140                         nflag = 1;
 141                         break;
 142                 case 'q':
 143                         qflag = 1;
 144                         break;
 145                 case 'v':
 146                         verbose = 1;
 147                         break;
 148                 case 't':
 149                         tflag = 1;
 150                         break;
 151                 case 'd':
 152                         debugonly = 1;
 153                         break;
 154                 case '?':
 155                 default:
 156                         usage((char *)NULL);
 157                 }
 158         argc -= optind;
 159         argv += optind;
 160
 161         pid = getpid();
 162         uid = geteuid();
 163         if (tflag)
 164                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 165         else
 166                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 167         if (s < 0)
 168                 err(EX_OSERR, "socket");
 169         if (*argv)
 170                 switch (keyword(*argv)) {
 171                 case K_GET:
 172                         uid = 0;
 173                         /* FALLTHROUGH */
 174
 175                 case K_CHANGE:
 176                 case K_ADD:
 177                 case K_DELETE:
 178                         newroute(argc, argv);
 179                         /* NOTREACHED */
 180
 181                 case K_MONITOR:
 182                         monitor();
 183                         /* NOTREACHED */
 184
 185                 case K_FLUSH:
 186                         flushroutes(argc, argv);
 187                         exit(0);
 188                         /* NOTREACHED */
 189                 }
 190         usage(*argv);
 191         /* NOTREACHED */
 192 }
 193
 194 /*
 195  * Purge all entries in the routing tables not
 196  * associated with network interfaces.
 197  */
 198 void
 199 flushroutes(argc, argv)
 200         int argc;
 201         char *argv[];
 202 {
 203         size_t needed;
 204         int mib[6], rlen, seqno, count = 0;
 205         char *buf, *next, *lim;
 206         struct rt_msghdr *rtm;
 207
 208         if (uid && !debugonly) {
 209                 errx(EX_NOPERM, "must be root to alter routing table");
 210         }
 211         shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 212         if (argc > 1) {
 213                 argv++;
 214                 if (argc == 2 && **argv == '-')
 215                     switch (keyword(*argv + 1)) {
 216                         case K_INET:
 217                                 af = AF_INET;
 218                                 break;
 219 #ifdef INET6
 220                         case K_INET6:
 221                                 af = AF_INET6;
 222                                 break;
 223 #endif
 224                         case K_ATALK:
 225                                 af = AF_APPLETALK;
 226                                 break;
 227                         case K_LINK:
 228                                 af = AF_LINK;
 229                                 break;
 230                         default:
 231                                 goto bad;
 232                 } else
 233 bad:                    usage(*argv);
 234         }
 235 retry:
 236         mib[0] = CTL_NET;
 237         mib[1] = PF_ROUTE;
 238         mib[2] = 0;             /* protocol */
 239         mib[3] = 0;             /* wildcard address family */
 240         mib[4] = NET_RT_DUMP;
 241         mib[5] = 0;             /* no flags */
 242         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 243                 err(EX_OSERR, "route-sysctl-estimate");
 244         if ((buf = malloc(needed)) == NULL)
 245                 errx(EX_OSERR, "malloc failed");
 246         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
 247                 if (errno == ENOMEM && count++ < 10) {
 248                         warnx("Routing table grew, retrying");
 249                         sleep(1);
 250                         free(buf);
 251                         goto retry;
 252                 }
 253                 err(EX_OSERR, "route-sysctl-get");
 254         }
 255         lim = buf + needed;
 256         if (verbose)
 257                 (void) printf("Examining routing table from sysctl\n");
 258         seqno = 0;              /* ??? */
 259         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 260                 rtm = (struct rt_msghdr *)next;
 261                 if (verbose)
 262                         print_rtmsg(rtm, rtm->rtm_msglen);
 263                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 264                         continue;
 265                 if (af) {
 266                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 267
 268                         if (sa->sa_family != af)
 269                                 continue;
 270                 }
 271                 if (debugonly)
 272                         continue;
 273                 rtm->rtm_type = RTM_DELETE;
 274                 rtm->rtm_seq = seqno;
 275                 rlen = write(s, next, rtm->rtm_msglen);
 276                 if (rlen < 0 && errno == EPERM)
 277                         err(1, "write to routing socket");
 278                 if (rlen < (int)rtm->rtm_msglen) {
 279                         warn("write to routing socket");
 280                         (void) printf("got only %d for rlen\n", rlen);
 281                         free(buf);
 282                         goto retry;
 283                         break;
 284                 }
 285                 seqno++;
 286                 if (qflag)
 287                         continue;
 288                 if (verbose)
 289                         print_rtmsg(rtm, rlen);
 290                 else {
 291                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 292                         (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 293                             routename(sa) : netname(sa));
 294                         sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
 295                         (void) printf("%-20.20s ", routename(sa));
 296                         (void) printf("done\n");
 297                 }
 298         }
 299 }
 300
 301 const char *
 302 routename(sa)
 303         struct sockaddr *sa;
 304 {
 305         char *cp;
 306         static char line[MAXHOSTNAMELEN + 1];
 307         struct hostent *hp;
 308         static char domain[MAXHOSTNAMELEN + 1];
 309         static int first = 1, n;
 310
 311         if (first) {
 312                 first = 0;
 313                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 314                     (cp = strchr(domain, '.'))) {
 315                         domain[MAXHOSTNAMELEN] = '\0';
 316                         (void) strcpy(domain, cp + 1);
 317                 } else
 318                         domain[0] = 0;
 319         }
 320
 321         if (sa->sa_len == 0)
 322                 strcpy(line, "default");
 323         else switch (sa->sa_family) {
 324
 325         case AF_INET:
 326             {   struct in_addr in;
 327                 in = ((struct sockaddr_in *)sa)->sin_addr;
 328
 329                 cp = 0;
 330                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 331                         cp = "default";
 332                 if (cp == 0 && !nflag) {
 333                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 334                                 AF_INET);
 335                         if (hp) {
 336                                 if ((cp = strchr(hp->h_name, '.')) &&
 337                                     !strcmp(cp + 1, domain))
 338                                         *cp = 0;
 339                                 cp = hp->h_name;
 340                         }
 341                 }
 342                 if (cp) {
 343                         strncpy(line, cp, sizeof(line) - 1);
 344                         line[sizeof(line) - 1] = '\0';
 345                 } else
 346                         (void) sprintf(line, "%s", inet_ntoa(in));
 347                 break;
 348             }
 349
 350 #ifdef INET6
 351         case AF_INET6:
 352         {
 353                 struct sockaddr_in6 sin6; /* use static var for safety */
 354                 int niflags = 0;
 355
 356                 memset(&sin6, 0, sizeof(sin6));
 357                 memcpy(&sin6, sa, sa->sa_len);
 358                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 359                 sin6.sin6_family = AF_INET6;
 360 #ifdef __KAME__
 361                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 362                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 363                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 364                     sin6.sin6_scope_id == 0) {
 365                         sin6.sin6_scope_id =
 366                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 367                         sin6.sin6_addr.s6_addr[2] = 0;
 368                         sin6.sin6_addr.s6_addr[3] = 0;
 369                 }
 370 #endif
 371                 if (nflag)
 372                         niflags |= NI_NUMERICHOST;
 373                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 374                     line, sizeof(line), NULL, 0, niflags) != 0)
 375                         strncpy(line, "invalid", sizeof(line));
 376
 377                 return(line);
 378         }
 379 #endif
 380
 381         case AF_APPLETALK:
 382                 (void) snprintf(line, sizeof(line), "atalk %s",
 383                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 384                 break;
 385
 386         case AF_LINK:
 387                 return (link_ntoa((struct sockaddr_dl *)sa));
 388
 389         default:
 390             {   u_short *s = (u_short *)sa;
 391                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 392                 char *cp = line + sprintf(line, "(%d)", sa->sa_family);
 393                 char *cpe = line + sizeof(line);
 394
 395                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 396                         if ((n = snprintf(cp, cpe - cp, " %x", *s)) > 0)
 397                                 cp += n;
 398                         else
 399                                 *cp = '\0';
 400                 break;
 401             }
 402         }
 403         return (line);
 404 }
 405
 406 /*
 407  * Return the name of the network whose address is given.
 408  * The address is assumed to be that of a net or subnet, not a host.
 409  */
 410 const char *
 411 netname(sa)
 412         struct sockaddr *sa;
 413 {
 414         char *cp = 0;
 415         static char line[MAXHOSTNAMELEN + 1];
 416         struct netent *np = 0;
 417         u_long net, mask;
 418         u_long i;
 419         int n, subnetshift;
 420
 421         switch (sa->sa_family) {
 422
 423         case AF_INET:
 424             {   struct in_addr in;
 425                 in = ((struct sockaddr_in *)sa)->sin_addr;
 426
 427                 i = in.s_addr = ntohl(in.s_addr);
 428                 if (in.s_addr == 0)
 429                         cp = "default";
 430                 else if (!nflag) {
 431                         if (IN_CLASSA(i)) {
 432                                 mask = IN_CLASSA_NET;
 433                                 subnetshift = 8;
 434                         } else if (IN_CLASSB(i)) {
 435                                 mask = IN_CLASSB_NET;
 436                                 subnetshift = 8;
 437                         } else {
 438                                 mask = IN_CLASSC_NET;
 439                                 subnetshift = 4;
 440                         }
 441                         /*
 442                          * If there are more bits than the standard mask
 443                          * would suggest, subnets must be in use.
 444                          * Guess at the subnet mask, assuming reasonable
 445                          * width subnet fields.
 446                          */
 447                         while (in.s_addr &~ mask)
 448                                 mask = (long)mask >> subnetshift;
 449                         net = in.s_addr & mask;
 450                         while ((mask & 1) == 0)
 451                                 mask >>= 1, net >>= 1;
 452                         np = getnetbyaddr(net, AF_INET);
 453                         if (np)
 454                                 cp = np->n_name;
 455                 }
 456 #define C(x)    (unsigned)((x) & 0xff)
 457                 if (cp)
 458                         strncpy(line, cp, sizeof(line));
 459                 else if ((in.s_addr & 0xffffff) == 0)
 460                         (void) sprintf(line, "%u", C(in.s_addr >> 24));
 461                 else if ((in.s_addr & 0xffff) == 0)
 462                         (void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
 463                             C(in.s_addr >> 16));
 464                 else if ((in.s_addr & 0xff) == 0)
 465                         (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 466                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 467                 else
 468                         (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 469                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 470                             C(in.s_addr));
 471 #undef C
 472                 break;
 473             }
 474
 475 #ifdef INET6
 476         case AF_INET6:
 477         {
 478                 struct sockaddr_in6 sin6; /* use static var for safety */
 479                 int niflags = 0;
 480
 481                 memset(&sin6, 0, sizeof(sin6));
 482                 memcpy(&sin6, sa, sa->sa_len);
 483                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 484                 sin6.sin6_family = AF_INET6;
 485 #ifdef __KAME__
 486                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 487                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 488                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 489                     sin6.sin6_scope_id == 0) {
 490                         sin6.sin6_scope_id =
 491                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 492                         sin6.sin6_addr.s6_addr[2] = 0;
 493                         sin6.sin6_addr.s6_addr[3] = 0;
 494                 }
 495 #endif
 496                 if (nflag)
 497                         niflags |= NI_NUMERICHOST;
 498                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 499                     line, sizeof(line), NULL, 0, niflags) != 0)
 500                         strncpy(line, "invalid", sizeof(line));
 501
 502                 return(line);
 503         }
 504 #endif
 505
 506         case AF_APPLETALK:
 507                 (void) snprintf(line, sizeof(line), "atalk %s",
 508                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 509                 break;
 510
 511         case AF_LINK:
 512                 return (link_ntoa((struct sockaddr_dl *)sa));
 513
 514
 515         default:
 516             {   u_short *s = (u_short *)sa->sa_data;
 517                 u_short *slim = s + ((sa->sa_len + 1)>>1);
 518                 char *cp = line + sprintf(line, "af %d:", sa->sa_family);
 519                 char *cpe = line + sizeof(line);
 520
 521                 while (s < slim && cp < cpe)
 522                         if ((n = snprintf(cp, cpe - cp, " %x", *s++)) > 0)
 523                                 cp += n;
 524                         else
 525                                 *cp = '\0';
 526                 break;
 527             }
 528         }
 529         return (line);
 530 }
 531
 532 void
 533 set_metric(value, key)
 534         char *value;
 535         int key;
 536 {
 537         int flag = 0;
 538         u_long noval, *valp = &noval;
 539
 540         switch (key) {
 541 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 542         caseof(K_MTU, RTV_MTU, rmx_mtu);
 543         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 544         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 545         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 546         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 547         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 548         caseof(K_RTT, RTV_RTT, rmx_rtt);
 549         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 550         }
 551         rtm_inits |= flag;
 552         if (lockrest || locking)
 553                 rt_metrics.rmx_locks |= flag;
 554         if (locking)
 555                 locking = 0;
 556         *valp = atoi(value);
 557 }
 558
 559 void
 560 newroute(argc, argv)
 561         int argc;
 562         char **argv;
 563 {
 564         char *cmd, *dest = "", *gateway = "", *err;
 565         int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 566         int key;
 567         struct hostent *hp = 0;
 568
 569         if (uid) {
 570                 errx(EX_NOPERM, "must be root to alter routing table");
 571         }
 572         cmd = argv[0];
 573         if (*cmd != 'g')
 574                 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 575         while (--argc > 0) {
 576                 if (**(++argv)== '-') {
 577                         switch (key = keyword(1 + *argv)) {
 578                         case K_LINK:
 579                                 af = AF_LINK;
 580                                 aflen = sizeof(struct sockaddr_dl);
 581                                 break;
 582                         case K_INET:
 583                                 af = AF_INET;
 584                                 aflen = sizeof(struct sockaddr_in);
 585                                 break;
 586 #ifdef INET6
 587                         case K_INET6:
 588                                 af = AF_INET6;
 589                                 aflen = sizeof(struct sockaddr_in6);
 590                                 break;
 591 #endif
 592                         case K_ATALK:
 593                                 af = AF_APPLETALK;
 594                                 aflen = sizeof(struct sockaddr_at);
 595                                 break;
 596                         case K_SA:
 597                                 af = PF_ROUTE;
 598                                 aflen = sizeof(union sockunion);
 599                                 break;
 600                         case K_IFACE:
 601                         case K_INTERFACE:
 602                                 iflag++;
 603                                 break;
 604                         case K_NOSTATIC:
 605                                 flags &= ~RTF_STATIC;
 606                                 break;
 607                         case K_LLINFO:
 608                                 flags |= RTF_LLINFO;
 609                                 break;
 610                         case K_LOCK:
 611                                 locking = 1;
 612                                 break;
 613                         case K_LOCKREST:
 614                                 lockrest = 1;
 615                                 break;
 616                         case K_HOST:
 617                                 forcehost++;
 618                                 break;
 619                         case K_REJECT:
 620                                 flags |= RTF_REJECT;
 621                                 break;
 622                         case K_BLACKHOLE:
 623                                 flags |= RTF_BLACKHOLE;
 624                                 break;
 625                         case K_PROTO1:
 626                                 flags |= RTF_PROTO1;
 627                                 break;
 628                         case K_PROTO2:
 629                                 flags |= RTF_PROTO2;
 630                                 break;
 631                         case K_PROXY:
 632                                 proxy = 1;
 633                                 break;
 634                         case K_CLONING:
 635                                 flags |= RTF_CLONING;
 636                                 break;
 637                         case K_XRESOLVE:
 638                                 flags |= RTF_XRESOLVE;
 639                                 break;
 640                         case K_STATIC:
 641                                 flags |= RTF_STATIC;
 642                                 break;
 643                         case K_IFA:
 644                                 if (!--argc)
 645                                         usage((char *)NULL);
 646                                 (void) getaddr(RTA_IFA, *++argv, 0);
 647                                 break;
 648                         case K_IFP:
 649                                 if (!--argc)
 650                                         usage((char *)NULL);
 651                                 (void) getaddr(RTA_IFP, *++argv, 0);
 652                                 break;
 653                         case K_GENMASK:
 654                                 if (!--argc)
 655                                         usage((char *)NULL);
 656                                 (void) getaddr(RTA_GENMASK, *++argv, 0);
 657                                 break;
 658                         case K_GATEWAY:
 659                                 if (!--argc)
 660                                         usage((char *)NULL);
 661                                 (void) getaddr(RTA_GATEWAY, *++argv, 0);
 662                                 break;
 663                         case K_DST:
 664                                 if (!--argc)
 665                                         usage((char *)NULL);
 666                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 667                                 dest = *argv;
 668                                 break;
 669                         case K_NETMASK:
 670                                 if (!--argc)
 671                                         usage((char *)NULL);
 672                                 (void) getaddr(RTA_NETMASK, *++argv, 0);
 673                                 /* FALLTHROUGH */
 674                         case K_NET:
 675                                 forcenet++;
 676                                 break;
 677                         case K_PREFIXLEN:
 678                                 if (!--argc)
 679                                         usage((char *)NULL);
 680                                 if (prefixlen(*++argv) == -1) {
 681                                         forcenet = 0;
 682                                         ishost = 1;
 683                                 } else {
 684                                         forcenet = 1;
 685                                         ishost = 0;
 686                                 }
 687                                 break;
 688                         case K_MTU:
 689                         case K_HOPCOUNT:
 690                         case K_EXPIRE:
 691                         case K_RECVPIPE:
 692                         case K_SENDPIPE:
 693                         case K_SSTHRESH:
 694                         case K_RTT:
 695                         case K_RTTVAR:
 696                                 if (!--argc)
 697                                         usage((char *)NULL);
 698                                 set_metric(*++argv, key);
 699                                 break;
 700                         default:
 701                                 usage(1+*argv);
 702                         }
 703                 } else {
 704                         if ((rtm_addrs & RTA_DST) == 0) {
 705                                 dest = *argv;
 706                                 ishost = getaddr(RTA_DST, *argv, &hp);
 707                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 708                                 gateway = *argv;
 709                                 (void) getaddr(RTA_GATEWAY, *argv, &hp);
 710                         } else {
 711                                 (void) getaddr(RTA_NETMASK, *argv, 0);
 712                                 forcenet = 1;
 713                         }
 714                 }
 715         }
 716         if (forcehost) {
 717                 ishost = 1;
 718 #ifdef INET6
 719                 if (af == AF_INET6) {
 720                         rtm_addrs &= ~RTA_NETMASK;
 721                         memset((void *)&so_mask, 0, sizeof(so_mask));
 722                 }
 723 #endif
 724         }
 725         if (forcenet)
 726                 ishost = 0;
 727         flags |= RTF_UP;
 728         if (ishost)
 729                 flags |= RTF_HOST;
 730         if (iflag == 0)
 731                 flags |= RTF_GATEWAY;
 732         if (proxy) {
 733                 so_dst.sinarp.sin_other = SIN_PROXY;
 734                 flags |= RTF_ANNOUNCE;
 735         }
 736         for (attempts = 1; ; attempts++) {
 737                 errno = 0;
 738                 if ((ret = rtmsg(*cmd, flags)) == 0)
 739                         break;
 740                 if (errno != ENETUNREACH && errno != ESRCH)
 741                         break;
 742                 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 743                         hp->h_addr_list++;
 744                         memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0],
 745                             MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
 746                 } else
 747                         break;
 748         }
 749         if (*cmd == 'g')
 750                 exit(0);
 751         if (!qflag) {
 752                 oerrno = errno;
 753                 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 754                 if (*gateway) {
 755                         (void) printf(": gateway %s", gateway);
 756                         if (attempts > 1 && ret == 0 && af == AF_INET)
 757                             (void) printf(" (%s)",
 758                                 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
 759                 }
 760                 if (ret == 0) {
 761                         (void) printf("\n");
 762                 } else {
 763                         switch (oerrno) {
 764                         case ESRCH:
 765                                 err = "not in table";
 766                                 break;
 767                         case EBUSY:
 768                                 err = "entry in use";
 769                                 break;
 770                         case ENOBUFS:
 771                                 err = "routing table overflow";
 772                                 break;
 773                         case EDQUOT: /* handle recursion avoidance in rt_setgate() */
 774                                 err = "gateway uses the same route";
 775                                 break;
 776                         default:
 777                                 err = strerror(oerrno);
 778                                 break;
 779                         }
 780                         (void) printf(": %s\n", err);
 781                 }
 782         }
 783         exit(ret != 0);
 784 }
 785
 786 void
 787 inet_makenetandmask(net, sin, bits)
 788         u_long net, bits;
 789         struct sockaddr_in *sin;
 790 {
 791         u_long addr, mask = 0;
 792         char *cp;
 793
 794         rtm_addrs |= RTA_NETMASK;
 795         if (net == 0)
 796                 mask = addr = 0;
 797         else if (net < 128) {
 798                 addr = net << IN_CLASSA_NSHIFT;
 799                 mask = IN_CLASSA_NET;
 800         } else if (net < 65536) {
 801                 addr = net << IN_CLASSB_NSHIFT;
 802                 mask = IN_CLASSB_NET;
 803         } else if (net < 16777216L) {
 804                 addr = net << IN_CLASSC_NSHIFT;
 805                 mask = IN_CLASSC_NET;
 806         } else {
 807                 addr = net;
 808                 if ((addr & IN_CLASSA_HOST) == 0)
 809                         mask =  IN_CLASSA_NET;
 810                 else if ((addr & IN_CLASSB_HOST) == 0)
 811                         mask =  IN_CLASSB_NET;
 812                 else if ((addr & IN_CLASSC_HOST) == 0)
 813                         mask =  IN_CLASSC_NET;
 814                 else
 815                         mask = -1;
 816         }
 817         if (bits)
 818                 mask = 0xffffffff << (32 - bits);
 819         sin->sin_addr.s_addr = htonl(addr);
 820         sin = &so_mask.sin;
 821         sin->sin_addr.s_addr = htonl(mask);
 822         sin->sin_len = 0;
 823         sin->sin_family = 0;
 824         cp = (char *)(&sin->sin_addr + 1);
 825         while (*--cp == 0 && cp > (char *)sin)
 826                 ;
 827         sin->sin_len = 1 + cp - (char *)sin;
 828 }
 829
 830 #ifdef INET6
 831 /*
 832  * XXX the function may need more improvement...
 833  */
 834 static int
 835 inet6_makenetandmask(sin6, plen)
 836         struct sockaddr_in6 *sin6;
 837         char *plen;
 838 {
 839         struct in6_addr in6;
 840
 841         if (!plen) {
 842                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 843                     sin6->sin6_scope_id == 0) {
 844                         plen = "0";
 845                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 846                         /* aggregatable global unicast - RFC2374 */
 847                         memset(&in6, 0, sizeof(in6));
 848                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
 849                                     &in6.s6_addr[8], 8))
 850                                 plen = "64";
 851                 }
 852         }
 853
 854         if (!plen || strcmp(plen, "128") == 0)
 855                 return 1;
 856         rtm_addrs |= RTA_NETMASK;
 857         (void)prefixlen(plen);
 858         return 0;
 859 }
 860 #endif
 861
 862 /*
 863  * Interpret an argument as a network address of some kind,
 864  * returning 1 if a host address, 0 if a network address.
 865  */
 866 int
 867 getaddr(which, s, hpp)
 868         int which;
 869         char *s;
 870         struct hostent **hpp;
 871 {
 872         sup su;
 873         struct hostent *hp;
 874         struct netent *np;
 875         u_long val;
 876         char *q;
 877         int afamily;  /* local copy of af so we can change it */
 878
 879         if (af == 0) {
 880                 af = AF_INET;
 881                 aflen = sizeof(struct sockaddr_in);
 882         }
 883         afamily = af;
 884         rtm_addrs |= which;
 885         switch (which) {
 886         case RTA_DST:
 887                 su = &so_dst;
 888                 break;
 889         case RTA_GATEWAY:
 890                 su = &so_gate;
 891                 if (iflag) {
 892                         struct ifaddrs *ifap, *ifa;
 893                         struct sockaddr_dl *sdl = NULL;
 894
 895                         if (getifaddrs(&ifap))
 896                                 err(1, "getifaddrs");
 897
 898                         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 899                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 900                                         continue;
 901
 902                                 if (strcmp(s, ifa->ifa_name))
 903                                         continue;
 904
 905                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 906                         }
 907                         /* If we found it, then use it */
 908                         if (sdl) {
 909                                 /*
 910                                  * Copy is safe since we have a
 911                                  * sockaddr_storage member in sockunion{}.
 912                                  * Note that we need to copy before calling
 913                                  * freeifaddrs().
 914                                  */
 915                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 916                         }
 917                         freeifaddrs(ifap);
 918                         if (sdl)
 919                                 return(1);
 920                 }
 921                 break;
 922         case RTA_NETMASK:
 923                 su = &so_mask;
 924                 break;
 925         case RTA_GENMASK:
 926                 su = &so_genmask;
 927                 break;
 928         case RTA_IFP:
 929                 su = &so_ifp;
 930                 afamily = AF_LINK;
 931                 break;
 932         case RTA_IFA:
 933                 su = &so_ifa;
 934                 break;
 935         default:
 936                 usage("internal error");
 937                 /*NOTREACHED*/
 938         }
 939         su->sa.sa_len = aflen;
 940         su->sa.sa_family = afamily; /* cases that don't want it have left already */
 941         if (strcmp(s, "default") == 0) {
 942                 /*
 943                  * Default is net 0.0.0.0/0
 944                  */
 945                 switch (which) {
 946                 case RTA_DST:
 947                         forcenet++;
 948 #if 0
 949                         bzero(su, sizeof(*su)); /* for readability */
 950 #endif
 951                         (void) getaddr(RTA_NETMASK, s, 0);
 952                         break;
 953 #if 0
 954                 case RTA_NETMASK:
 955                 case RTA_GENMASK:
 956                         bzero(su, sizeof(*su)); /* for readability */
 957 #endif
 958                 }
 959                 return (0);
 960         }
 961         switch (afamily) {
 962 #ifdef INET6
 963         case AF_INET6:
 964         {
 965                 struct addrinfo hints, *res;
 966                 int ecode;
 967
 968                 q = NULL;
 969                 if (which == RTA_DST && (q = strchr(s, '/')) != NULL)
 970                         *q = '\0';
 971                 memset(&hints, 0, sizeof(hints));
 972                 hints.ai_family = afamily;      /*AF_INET6*/
 973                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
 974                 ecode = getaddrinfo(s, NULL, &hints, &res);
 975                 if (ecode != 0 || res->ai_family != AF_INET6 ||
 976                     res->ai_addrlen != sizeof(su->sin6)) {
 977                         (void) fprintf(stderr, "%s: %s\n", s,
 978                             gai_strerror(ecode));
 979                         exit(1);
 980                 }
 981                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
 982 #ifdef __KAME__
 983                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
 984                      IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) &&
 985                     su->sin6.sin6_scope_id) {
 986                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
 987                                 htons(su->sin6.sin6_scope_id);
 988                         su->sin6.sin6_scope_id = 0;
 989                 }
 990 #endif
 991                 freeaddrinfo(res);
 992                 if (q != NULL)
 993                         *q++ = '/';
 994                 if (which == RTA_DST)
 995                         return (inet6_makenetandmask(&su->sin6, q));
 996                 return (0);
 997         }
 998 #endif /* INET6 */
 999
1000         case AF_APPLETALK:
1001                 if (!atalk_aton(s, &su->sat.sat_addr))
1002                         errx(EX_NOHOST, "bad address: %s", s);
1003                 rtm_addrs |= RTA_NETMASK;
1004                 return(forcehost || su->sat.sat_addr.s_node != 0);
1005
1006         case AF_LINK:
1007                 link_addr(s, &su->sdl);
1008                 return (1);
1009
1010
1011         case PF_ROUTE:
1012                 su->sa.sa_len = sizeof(*su);
1013                 sockaddr(s, &su->sa);
1014                 return (1);
1015
1016         case AF_INET:
1017         default:
1018                 break;
1019         }
1020
1021         if (hpp == NULL)
1022                 hpp = &hp;
1023         *hpp = NULL;
1024
1025         q = strchr(s,'/');
1026         if (q && which == RTA_DST) {
1027                 *q = '\0';
1028                 if ((val = inet_network(s)) != INADDR_NONE) {
1029                         inet_makenetandmask(
1030                                 val, &su->sin, strtoul(q+1, 0, 0));
1031                         return (0);
1032                 }
1033                 *q = '/';
1034         }
1035         if ((which != RTA_DST || forcenet == 0) &&
1036             inet_aton(s, &su->sin.sin_addr)) {
1037                 val = su->sin.sin_addr.s_addr;
1038                 if (which != RTA_DST || forcehost ||
1039                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1040                         return (1);
1041                 else {
1042                         val = ntohl(val);
1043                         goto netdone;
1044                 }
1045         }
1046         if (which == RTA_DST && forcehost == 0 &&
1047             ((val = inet_network(s)) != INADDR_NONE ||
1048             ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
1049 netdone:
1050                 inet_makenetandmask(val, &su->sin, 0);
1051                 return (0);
1052         }
1053         hp = gethostbyname(s);
1054         if (hp) {
1055                 *hpp = hp;
1056                 su->sin.sin_family = hp->h_addrtype;
1057                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1058                     MIN(hp->h_length, sizeof(su->sin.sin_addr)));
1059                 return (1);
1060         }
1061         errx(EX_NOHOST, "bad address: %s", s);
1062 }
1063
1064 int
1065 prefixlen(s)
1066         char *s;
1067 {
1068         int len = atoi(s), q, r;
1069         int max;
1070         char *p;
1071
1072         rtm_addrs |= RTA_NETMASK;
1073         switch (af) {
1074 #ifdef INET6
1075         case AF_INET6:
1076                 max = 128;
1077                 p = (char *)&so_mask.sin6.sin6_addr;
1078                 break;
1079 #endif
1080         case AF_INET:
1081                 max = 32;
1082                 p = (char *)&so_mask.sin.sin_addr;
1083                 break;
1084         default:
1085                 (void) fprintf(stderr, "prefixlen not supported in this af\n");
1086                 exit(1);
1087                 /*NOTREACHED*/
1088         }
1089
1090         if (len < 0 || max < len) {
1091                 (void) fprintf(stderr, "%s: bad value\n", s);
1092                 exit(1);
1093         }
1094
1095         q = len >> 3;
1096         r = len & 7;
1097         so_mask.sa.sa_family = af;
1098         so_mask.sa.sa_len = aflen;
1099         memset((void *)p, 0, max / 8);
1100         if (q > 0)
1101                 memset((void *)p, 0xff, q);
1102         if (r > 0)
1103                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1104         if (len == max)
1105                 return -1;
1106         else
1107                 return len;
1108 }
1109
1110 void
1111 interfaces()
1112 {
1113         size_t needed;
1114         int mib[6];
1115         char *buf, *lim, *next, count = 0;
1116         struct rt_msghdr *rtm;
1117
1118 retry2:
1119         mib[0] = CTL_NET;
1120         mib[1] = PF_ROUTE;
1121         mib[2] = 0;             /* protocol */
1122         mib[3] = 0;             /* wildcard address family */
1123         mib[4] = NET_RT_IFLIST;
1124         mib[5] = 0;             /* no flags */
1125         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1126                 err(EX_OSERR, "route-sysctl-estimate");
1127         if ((buf = malloc(needed)) == NULL)
1128                 errx(EX_OSERR, "malloc failed");
1129         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
1130                 if (errno == ENOMEM && count++ < 10) {
1131                         warnx("Routing table grew, retrying");
1132                         sleep(1);
1133                         free(buf);
1134                         goto retry2;
1135                 }
1136                 err(EX_OSERR, "actual retrieval of interface table");
1137         }
1138         lim = buf + needed;
1139         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1140                 rtm = (struct rt_msghdr *)next;
1141                 print_rtmsg(rtm, rtm->rtm_msglen);
1142         }
1143 }
1144
1145 void
1146 monitor()
1147 {
1148         int n;
1149         char msg[2048];
1150
1151         verbose = 1;
1152         if (debugonly) {
1153                 interfaces();
1154                 exit(0);
1155         }
1156         for(;;) {
1157                 time_t now;
1158                 n = read(s, msg, 2048);
1159                 now = time(NULL);
1160                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1161                 print_rtmsg((struct rt_msghdr *)msg, n);
1162         }
1163 }
1164
1165 struct {
1166         struct  rt_msghdr m_rtm;
1167         char    m_space[512];
1168 } m_rtmsg;
1169
1170 int
1171 rtmsg(cmd, flags)
1172         int cmd, flags;
1173 {
1174         static int seq;
1175         int rlen;
1176         char *cp = m_rtmsg.m_space;
1177         int l;
1178
1179 #define NEXTADDR(w, u) \
1180         if (rtm_addrs & (w)) {\
1181             l = SA_SIZE(&(u.sa)); memmove(cp, &(u), l); cp += l;\
1182             if (verbose) sodump(&(u),"u");\
1183         }
1184
1185         errno = 0;
1186         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1187         if (cmd == 'a')
1188                 cmd = RTM_ADD;
1189         else if (cmd == 'c')
1190                 cmd = RTM_CHANGE;
1191         else if (cmd == 'g') {
1192                 cmd = RTM_GET;
1193                 if (so_ifp.sa.sa_family == 0) {
1194                         so_ifp.sa.sa_family = AF_LINK;
1195                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1196                         rtm_addrs |= RTA_IFP;
1197                 }
1198         } else
1199                 cmd = RTM_DELETE;
1200 #define rtm m_rtmsg.m_rtm
1201         rtm.rtm_type = cmd;
1202         rtm.rtm_flags = flags;
1203         rtm.rtm_version = RTM_VERSION;
1204         rtm.rtm_seq = ++seq;
1205         rtm.rtm_addrs = rtm_addrs;
1206         rtm.rtm_rmx = rt_metrics;
1207         rtm.rtm_inits = rtm_inits;
1208
1209         if (rtm_addrs & RTA_NETMASK)
1210                 mask_addr();
1211         NEXTADDR(RTA_DST, so_dst);
1212         NEXTADDR(RTA_GATEWAY, so_gate);
1213         NEXTADDR(RTA_NETMASK, so_mask);
1214         NEXTADDR(RTA_GENMASK, so_genmask);
1215         NEXTADDR(RTA_IFP, so_ifp);
1216         NEXTADDR(RTA_IFA, so_ifa);
1217         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1218         if (verbose)
1219                 print_rtmsg(&rtm, l);
1220         if (debugonly)
1221                 return (0);
1222         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1223                 if (errno == EPERM)
1224                         err(1, "writing to routing socket");
1225                 warn("writing to routing socket");
1226                 return (-1);
1227         }
1228         if (cmd == RTM_GET) {
1229                 do {
1230                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1231                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1232                 if (l < 0)
1233                         warn("read from routing socket");
1234                 else
1235                         print_getmsg(&rtm, l);
1236         }
1237 #undef rtm
1238         return (0);
1239 }
1240
1241 void
1242 mask_addr()
1243 {
1244         int olen = so_mask.sa.sa_len;
1245         char *cp1 = olen + (char *)&so_mask, *cp2;
1246
1247         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1248                 if (*--cp1 != 0) {
1249                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1250                         break;
1251                 }
1252         if ((rtm_addrs & RTA_DST) == 0)
1253                 return;
1254         switch (so_dst.sa.sa_family) {
1255         case AF_INET:
1256 #ifdef INET6
1257         case AF_INET6:
1258 #endif
1259         case AF_APPLETALK:
1260         case 0:
1261                 return;
1262         }
1263         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1264         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1265         while (cp2 > cp1)
1266                 *--cp2 = 0;
1267         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1268         while (cp1 > so_dst.sa.sa_data)
1269                 *--cp1 &= *--cp2;
1270 }
1271
1272 char *msgtypes[] = {
1273         "",
1274         "RTM_ADD: Add Route",
1275         "RTM_DELETE: Delete Route",
1276         "RTM_CHANGE: Change Metrics or flags",
1277         "RTM_GET: Report Metrics",
1278         "RTM_LOSING: Kernel Suspects Partitioning",
1279         "RTM_REDIRECT: Told to use different route",
1280         "RTM_MISS: Lookup failed on this address",
1281         "RTM_LOCK: fix specified metrics",
1282         "RTM_OLDADD: caused by SIOCADDRT",
1283         "RTM_OLDDEL: caused by SIOCDELRT",
1284         "RTM_RESOLVE: Route created by cloning",
1285         "RTM_NEWADDR: address being added to iface",
1286         "RTM_DELADDR: address being removed from iface",
1287         "RTM_IFINFO: iface status change",
1288         "RTM_NEWMADDR: new multicast group membership on iface",
1289         "RTM_DELMADDR: multicast group membership removed from iface",
1290         "RTM_IFANNOUNCE: interface arrival/departure",
1291         0,
1292 };
1293
1294 char metricnames[] =
1295 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1296 "\1mtu";
1297 char routeflags[] =
1298 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1299 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1300 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1301 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1302 char ifnetflags[] =
1303 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1304 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1305 "\017LINK2\020MULTICAST";
1306 char addrnames[] =
1307 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1308
1309 void
1310 print_rtmsg(rtm, msglen)
1311         struct rt_msghdr *rtm;
1312         int msglen;
1313 {
1314         struct if_msghdr *ifm;
1315         struct ifa_msghdr *ifam;
1316 #ifdef RTM_NEWMADDR
1317         struct ifma_msghdr *ifmam;
1318 #endif
1319         struct if_announcemsghdr *ifan;
1320         char *state;
1321
1322         if (verbose == 0)
1323                 return;
1324         if (rtm->rtm_version != RTM_VERSION) {
1325                 (void) printf("routing message version %d not understood\n",
1326                     rtm->rtm_version);
1327                 return;
1328         }
1329         if (msgtypes[rtm->rtm_type] != NULL)
1330                 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1331         else
1332                 (void)printf("#%d: ", rtm->rtm_type);
1333         (void)printf("len %d, ", rtm->rtm_msglen);
1334         switch (rtm->rtm_type) {
1335         case RTM_IFINFO:
1336                 ifm = (struct if_msghdr *)rtm;
1337                 (void) printf("if# %d, ", ifm->ifm_index);
1338                 switch (ifm->ifm_data.ifi_link_state) {
1339                 case LINK_STATE_DOWN:
1340                         state = "down";
1341                         break;
1342                 case LINK_STATE_UP:
1343                         state = "up";
1344                         break;
1345                 default:
1346                         state = "unknown";
1347                         break;
1348                 }
1349                 (void) printf("link: %s, flags:", state);
1350                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1351                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1352                 break;
1353         case RTM_NEWADDR:
1354         case RTM_DELADDR:
1355                 ifam = (struct ifa_msghdr *)rtm;
1356                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1357                 bprintf(stdout, ifam->ifam_flags, routeflags);
1358                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1359                 break;
1360 #ifdef RTM_NEWMADDR
1361         case RTM_NEWMADDR:
1362         case RTM_DELMADDR:
1363                 ifmam = (struct ifma_msghdr *)rtm;
1364                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1365                 break;
1366 #endif
1367         case RTM_IFANNOUNCE:
1368                 ifan = (struct if_announcemsghdr *)rtm;
1369                 (void) printf("if# %d, what: ", ifan->ifan_index);
1370                 switch (ifan->ifan_what) {
1371                 case IFAN_ARRIVAL:
1372                         printf("arrival");
1373                         break;
1374                 case IFAN_DEPARTURE:
1375                         printf("departure");
1376                         break;
1377                 default:
1378                         printf("#%d", ifan->ifan_what);
1379                         break;
1380                 }
1381                 printf("\n");
1382                 break;
1383
1384         default:
1385                 (void) printf("pid: %ld, seq %d, errno %d, flags:",
1386                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1387                 bprintf(stdout, rtm->rtm_flags, routeflags);
1388                 pmsg_common(rtm);
1389         }
1390 }
1391
1392 void
1393 print_getmsg(rtm, msglen)
1394         struct rt_msghdr *rtm;
1395         int msglen;
1396 {
1397         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1398         struct sockaddr_dl *ifp = NULL;
1399         struct sockaddr *sa;
1400         char *cp;
1401         int i;
1402
1403         (void) printf("   route to: %s\n", routename(&so_dst));
1404         if (rtm->rtm_version != RTM_VERSION) {
1405                 warnx("routing message version %d not understood",
1406                      rtm->rtm_version);
1407                 return;
1408         }
1409         if (rtm->rtm_msglen > msglen) {
1410                 warnx("message length mismatch, in packet %d, returned %d",
1411                       rtm->rtm_msglen, msglen);
1412         }
1413         if (rtm->rtm_errno)  {
1414                 errno = rtm->rtm_errno;
1415                 warn("message indicates error %d", errno);
1416                 return;
1417         }
1418         cp = ((char *)(rtm + 1));
1419         if (rtm->rtm_addrs)
1420                 for (i = 1; i; i <<= 1)
1421                         if (i & rtm->rtm_addrs) {
1422                                 sa = (struct sockaddr *)cp;
1423                                 switch (i) {
1424                                 case RTA_DST:
1425                                         dst = sa;
1426                                         break;
1427                                 case RTA_GATEWAY:
1428                                         gate = sa;
1429                                         break;
1430                                 case RTA_NETMASK:
1431                                         mask = sa;
1432                                         break;
1433                                 case RTA_IFP:
1434                                         if (sa->sa_family == AF_LINK &&
1435                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1436                                                 ifp = (struct sockaddr_dl *)sa;
1437                                         break;
1438                                 }
1439                                 cp += SA_SIZE(sa);
1440                         }
1441         if (dst && mask)
1442                 mask->sa_family = dst->sa_family;       /* XXX */
1443         if (dst)
1444                 (void)printf("destination: %s\n", routename(dst));
1445         if (mask) {
1446                 int savenflag = nflag;
1447
1448                 nflag = 1;
1449                 (void)printf("       mask: %s\n", routename(mask));
1450                 nflag = savenflag;
1451         }
1452         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1453                 (void)printf("    gateway: %s\n", routename(gate));
1454         if (ifp)
1455                 (void)printf("  interface: %.*s\n",
1456                     ifp->sdl_nlen, ifp->sdl_data);
1457         (void)printf("      flags: ");
1458         bprintf(stdout, rtm->rtm_flags, routeflags);
1459
1460 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1461 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1462
1463         (void) printf("\n%s\n", "\
1464  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
1465         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1466         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1467         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1468         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1469         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1470         printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1471         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1472         if (rtm->rtm_rmx.rmx_expire)
1473                 rtm->rtm_rmx.rmx_expire -= time(0);
1474         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1475 #undef lock
1476 #undef msec
1477 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1478         if (verbose)
1479                 pmsg_common(rtm);
1480         else if (rtm->rtm_addrs &~ RTA_IGN) {
1481                 (void) printf("sockaddrs: ");
1482                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1483                 putchar('\n');
1484         }
1485 #undef  RTA_IGN
1486 }
1487
1488 void
1489 pmsg_common(rtm)
1490         struct rt_msghdr *rtm;
1491 {
1492         (void) printf("\nlocks: ");
1493         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1494         (void) printf(" inits: ");
1495         bprintf(stdout, rtm->rtm_inits, metricnames);
1496         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1497 }
1498
1499 void
1500 pmsg_addrs(cp, addrs)
1501         char    *cp;
1502         int     addrs;
1503 {
1504         struct sockaddr *sa;
1505         int i;
1506
1507         if (addrs == 0) {
1508                 (void) putchar('\n');
1509                 return;
1510         }
1511         (void) printf("\nsockaddrs: ");
1512         bprintf(stdout, addrs, addrnames);
1513         (void) putchar('\n');
1514         for (i = 1; i; i <<= 1)
1515                 if (i & addrs) {
1516                         sa = (struct sockaddr *)cp;
1517                         (void) printf(" %s", routename(sa));
1518                         cp += SA_SIZE(sa);
1519                 }
1520         (void) putchar('\n');
1521         (void) fflush(stdout);
1522 }
1523
1524 void
1525 bprintf(fp, b, s)
1526         FILE *fp;
1527         int b;
1528         u_char *s;
1529 {
1530         int i;
1531         int gotsome = 0;
1532
1533         if (b == 0)
1534                 return;
1535         while ((i = *s++) != 0) {
1536                 if (b & (1 << (i-1))) {
1537                         if (gotsome == 0)
1538                                 i = '<';
1539                         else
1540                                 i = ',';
1541                         (void) putc(i, fp);
1542                         gotsome = 1;
1543                         for (; (i = *s) > 32; s++)
1544                                 (void) putc(i, fp);
1545                 } else
1546                         while (*s > 32)
1547                                 s++;
1548         }
1549         if (gotsome)
1550                 (void) putc('>', fp);
1551 }
1552
1553 int
1554 keyword(cp)
1555         char *cp;
1556 {
1557         struct keytab *kt = keywords;
1558
1559         while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1560                 kt++;
1561         return kt->kt_i;
1562 }
1563
1564 void
1565 sodump(su, which)
1566         sup su;
1567         char *which;
1568 {
1569         switch (su->sa.sa_family) {
1570         case AF_LINK:
1571                 (void) printf("%s: link %s; ",
1572                     which, link_ntoa(&su->sdl));
1573                 break;
1574         case AF_INET:
1575                 (void) printf("%s: inet %s; ",
1576                     which, inet_ntoa(su->sin.sin_addr));
1577                 break;
1578         case AF_APPLETALK:
1579                 (void) printf("%s: atalk %s; ",
1580                     which, atalk_ntoa(su->sat.sat_addr));
1581                 break;
1582         }
1583         (void) fflush(stdout);
1584 }
1585
1586 /* States*/
1587 #define VIRGIN  0
1588 #define GOTONE  1
1589 #define GOTTWO  2
1590 /* Inputs */
1591 #define DIGIT   (4*0)
1592 #define END     (4*1)
1593 #define DELIM   (4*2)
1594
1595 void
1596 sockaddr(addr, sa)
1597         char *addr;
1598         struct sockaddr *sa;
1599 {
1600         char *cp = (char *)sa;
1601         int size = sa->sa_len;
1602         char *cplim = cp + size;
1603         int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1604
1605         memset(cp, 0, size);
1606         cp++;
1607         do {
1608                 if ((*addr >= '0') && (*addr <= '9')) {
1609                         new = *addr - '0';
1610                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1611                         new = *addr - 'a' + 10;
1612                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1613                         new = *addr - 'A' + 10;
1614                 } else if (*addr == 0)
1615                         state |= END;
1616                 else
1617                         state |= DELIM;
1618                 addr++;
1619                 switch (state /* | INPUT */) {
1620                 case GOTTWO | DIGIT:
1621                         *cp++ = byte; /*FALLTHROUGH*/
1622                 case VIRGIN | DIGIT:
1623                         state = GOTONE; byte = new; continue;
1624                 case GOTONE | DIGIT:
1625                         state = GOTTWO; byte = new + (byte << 4); continue;
1626                 default: /* | DELIM */
1627                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1628                 case GOTONE | END:
1629                 case GOTTWO | END:
1630                         *cp++ = byte; /* FALLTHROUGH */
1631                 case VIRGIN | END:
1632                         break;
1633                 }
1634                 break;
1635         } while (cp < cplim);
1636         sa->sa_len = cp - (char *)sa;
1637 }
1638
1639 int
1640 atalk_aton(const char *text, struct at_addr *addr)
1641 {
1642         u_int net, node;
1643
1644         if (sscanf(text, "%u.%u", &net, &node) != 2
1645             || net > 0xffff || node > 0xff)
1646                 return(0);
1647         addr->s_net = htons(net);
1648         addr->s_node = node;
1649         return(1);
1650 }
1651
1652 char *
1653 atalk_ntoa(struct at_addr at)
1654 {
1655         static char buf[20];
1656
1657         (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1658         return(buf);
1659 }