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                 case K_SHOW:
 173                         uid = 0;
 174                         /* FALLTHROUGH */
 175
 176                 case K_CHANGE:
 177                 case K_ADD:
 178                 case K_DEL:
 179                 case K_DELETE:
 180                         newroute(argc, argv);
 181                         /* NOTREACHED */
 182
 183                 case K_MONITOR:
 184                         monitor();
 185                         /* NOTREACHED */
 186
 187                 case K_FLUSH:
 188                         flushroutes(argc, argv);
 189                         exit(0);
 190                         /* NOTREACHED */
 191                 }
 192         usage(*argv);
 193         /* NOTREACHED */
 194 }
 195
 196 /*
 197  * Purge all entries in the routing tables not
 198  * associated with network interfaces.
 199  */
 200 void
 201 flushroutes(argc, argv)
 202         int argc;
 203         char *argv[];
 204 {
 205         size_t needed;
 206         int mib[6], rlen, seqno, count = 0;
 207         char *buf, *next, *lim;
 208         struct rt_msghdr *rtm;
 209
 210         if (uid && !debugonly) {
 211                 errx(EX_NOPERM, "must be root to alter routing table");
 212         }
 213         shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 214         if (argc > 1) {
 215                 argv++;
 216                 if (argc == 2 && **argv == '-')
 217                     switch (keyword(*argv + 1)) {
 218                         case K_INET:
 219                                 af = AF_INET;
 220                                 break;
 221 #ifdef INET6
 222                         case K_INET6:
 223                                 af = AF_INET6;
 224                                 break;
 225 #endif
 226                         case K_ATALK:
 227                                 af = AF_APPLETALK;
 228                                 break;
 229                         case K_LINK:
 230                                 af = AF_LINK;
 231                                 break;
 232                         default:
 233                                 goto bad;
 234                 } else
 235 bad:                    usage(*argv);
 236         }
 237 retry:
 238         mib[0] = CTL_NET;
 239         mib[1] = PF_ROUTE;
 240         mib[2] = 0;             /* protocol */
 241         mib[3] = 0;             /* wildcard address family */
 242         mib[4] = NET_RT_DUMP;
 243         mib[5] = 0;             /* no flags */
 244         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 245                 err(EX_OSERR, "route-sysctl-estimate");
 246         if ((buf = malloc(needed)) == NULL)
 247                 errx(EX_OSERR, "malloc failed");
 248         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
 249                 if (errno == ENOMEM && count++ < 10) {
 250                         warnx("Routing table grew, retrying");
 251                         sleep(1);
 252                         free(buf);
 253                         goto retry;
 254                 }
 255                 err(EX_OSERR, "route-sysctl-get");
 256         }
 257         lim = buf + needed;
 258         if (verbose)
 259                 (void) printf("Examining routing table from sysctl\n");
 260         seqno = 0;              /* ??? */
 261         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 262                 rtm = (struct rt_msghdr *)next;
 263                 if (verbose)
 264                         print_rtmsg(rtm, rtm->rtm_msglen);
 265                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 266                         continue;
 267                 if (af) {
 268                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 269
 270                         if (sa->sa_family != af)
 271                                 continue;
 272                 }
 273                 if (debugonly)
 274                         continue;
 275                 rtm->rtm_type = RTM_DELETE;
 276                 rtm->rtm_seq = seqno;
 277                 rlen = write(s, next, rtm->rtm_msglen);
 278                 if (rlen < 0 && errno == EPERM)
 279                         err(1, "write to routing socket");
 280                 if (rlen < (int)rtm->rtm_msglen) {
 281                         warn("write to routing socket");
 282                         (void) printf("got only %d for rlen\n", rlen);
 283                         free(buf);
 284                         goto retry;
 285                         break;
 286                 }
 287                 seqno++;
 288                 if (qflag)
 289                         continue;
 290                 if (verbose)
 291                         print_rtmsg(rtm, rlen);
 292                 else {
 293                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 294                         (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 295                             routename(sa) : netname(sa));
 296                         sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
 297                         (void) printf("%-20.20s ", routename(sa));
 298                         (void) printf("done\n");
 299                 }
 300         }
 301 }
 302
 303 const char *
 304 routename(sa)
 305         struct sockaddr *sa;
 306 {
 307         char *cp;
 308         static char line[MAXHOSTNAMELEN + 1];
 309         struct hostent *hp;
 310         static char domain[MAXHOSTNAMELEN + 1];
 311         static int first = 1, n;
 312
 313         if (first) {
 314                 first = 0;
 315                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 316                     (cp = strchr(domain, '.'))) {
 317                         domain[MAXHOSTNAMELEN] = '\0';
 318                         (void) strcpy(domain, cp + 1);
 319                 } else
 320                         domain[0] = 0;
 321         }
 322
 323         if (sa->sa_len == 0)
 324                 strcpy(line, "default");
 325         else switch (sa->sa_family) {
 326
 327         case AF_INET:
 328             {   struct in_addr in;
 329                 in = ((struct sockaddr_in *)sa)->sin_addr;
 330
 331                 cp = 0;
 332                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 333                         cp = "default";
 334                 if (cp == 0 && !nflag) {
 335                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 336                                 AF_INET);
 337                         if (hp) {
 338                                 if ((cp = strchr(hp->h_name, '.')) &&
 339                                     !strcmp(cp + 1, domain))
 340                                         *cp = 0;
 341                                 cp = hp->h_name;
 342                         }
 343                 }
 344                 if (cp) {
 345                         strncpy(line, cp, sizeof(line) - 1);
 346                         line[sizeof(line) - 1] = '\0';
 347                 } else
 348                         (void) sprintf(line, "%s", inet_ntoa(in));
 349                 break;
 350             }
 351
 352 #ifdef INET6
 353         case AF_INET6:
 354         {
 355                 struct sockaddr_in6 sin6; /* use static var for safety */
 356                 int niflags = 0;
 357
 358                 memset(&sin6, 0, sizeof(sin6));
 359                 memcpy(&sin6, sa, sa->sa_len);
 360                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 361                 sin6.sin6_family = AF_INET6;
 362 #ifdef __KAME__
 363                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 364                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 365                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 366                     sin6.sin6_scope_id == 0) {
 367                         sin6.sin6_scope_id =
 368                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 369                         sin6.sin6_addr.s6_addr[2] = 0;
 370                         sin6.sin6_addr.s6_addr[3] = 0;
 371                 }
 372 #endif
 373                 if (nflag)
 374                         niflags |= NI_NUMERICHOST;
 375                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 376                     line, sizeof(line), NULL, 0, niflags) != 0)
 377                         strncpy(line, "invalid", sizeof(line));
 378
 379                 return(line);
 380         }
 381 #endif
 382
 383         case AF_APPLETALK:
 384                 (void) snprintf(line, sizeof(line), "atalk %s",
 385                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 386                 break;
 387
 388         case AF_LINK:
 389                 return (link_ntoa((struct sockaddr_dl *)sa));
 390
 391         default:
 392             {   u_short *s = (u_short *)sa;
 393                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 394                 char *cp = line + sprintf(line, "(%d)", sa->sa_family);
 395                 char *cpe = line + sizeof(line);
 396
 397                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 398                         if ((n = snprintf(cp, cpe - cp, " %x", *s)) > 0)
 399                                 cp += n;
 400                         else
 401                                 *cp = '\0';
 402                 break;
 403             }
 404         }
 405         return (line);
 406 }
 407
 408 /*
 409  * Return the name of the network whose address is given.
 410  * The address is assumed to be that of a net or subnet, not a host.
 411  */
 412 const char *
 413 netname(sa)
 414         struct sockaddr *sa;
 415 {
 416         char *cp = 0;
 417         static char line[MAXHOSTNAMELEN + 1];
 418         struct netent *np = 0;
 419         u_long net, mask;
 420         u_long i;
 421         int n, subnetshift;
 422
 423         switch (sa->sa_family) {
 424
 425         case AF_INET:
 426             {   struct in_addr in;
 427                 in = ((struct sockaddr_in *)sa)->sin_addr;
 428
 429                 i = in.s_addr = ntohl(in.s_addr);
 430                 if (in.s_addr == 0)
 431                         cp = "default";
 432                 else if (!nflag) {
 433                         if (IN_CLASSA(i)) {
 434                                 mask = IN_CLASSA_NET;
 435                                 subnetshift = 8;
 436                         } else if (IN_CLASSB(i)) {
 437                                 mask = IN_CLASSB_NET;
 438                                 subnetshift = 8;
 439                         } else {
 440                                 mask = IN_CLASSC_NET;
 441                                 subnetshift = 4;
 442                         }
 443                         /*
 444                          * If there are more bits than the standard mask
 445                          * would suggest, subnets must be in use.
 446                          * Guess at the subnet mask, assuming reasonable
 447                          * width subnet fields.
 448                          */
 449                         while (in.s_addr &~ mask)
 450                                 mask = (long)mask >> subnetshift;
 451                         net = in.s_addr & mask;
 452                         while ((mask & 1) == 0)
 453                                 mask >>= 1, net >>= 1;
 454                         np = getnetbyaddr(net, AF_INET);
 455                         if (np)
 456                                 cp = np->n_name;
 457                 }
 458 #define C(x)    (unsigned)((x) & 0xff)
 459                 if (cp)
 460                         strncpy(line, cp, sizeof(line));
 461                 else if ((in.s_addr & 0xffffff) == 0)
 462                         (void) sprintf(line, "%u", C(in.s_addr >> 24));
 463                 else if ((in.s_addr & 0xffff) == 0)
 464                         (void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
 465                             C(in.s_addr >> 16));
 466                 else if ((in.s_addr & 0xff) == 0)
 467                         (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 468                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 469                 else
 470                         (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 471                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 472                             C(in.s_addr));
 473 #undef C
 474                 break;
 475             }
 476
 477 #ifdef INET6
 478         case AF_INET6:
 479         {
 480                 struct sockaddr_in6 sin6; /* use static var for safety */
 481                 int niflags = 0;
 482
 483                 memset(&sin6, 0, sizeof(sin6));
 484                 memcpy(&sin6, sa, sa->sa_len);
 485                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 486                 sin6.sin6_family = AF_INET6;
 487 #ifdef __KAME__
 488                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 489                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 490                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 491                     sin6.sin6_scope_id == 0) {
 492                         sin6.sin6_scope_id =
 493                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 494                         sin6.sin6_addr.s6_addr[2] = 0;
 495                         sin6.sin6_addr.s6_addr[3] = 0;
 496                 }
 497 #endif
 498                 if (nflag)
 499                         niflags |= NI_NUMERICHOST;
 500                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 501                     line, sizeof(line), NULL, 0, niflags) != 0)
 502                         strncpy(line, "invalid", sizeof(line));
 503
 504                 return(line);
 505         }
 506 #endif
 507
 508         case AF_APPLETALK:
 509                 (void) snprintf(line, sizeof(line), "atalk %s",
 510                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 511                 break;
 512
 513         case AF_LINK:
 514                 return (link_ntoa((struct sockaddr_dl *)sa));
 515
 516
 517         default:
 518             {   u_short *s = (u_short *)sa->sa_data;
 519                 u_short *slim = s + ((sa->sa_len + 1)>>1);
 520                 char *cp = line + sprintf(line, "af %d:", sa->sa_family);
 521                 char *cpe = line + sizeof(line);
 522
 523                 while (s < slim && cp < cpe)
 524                         if ((n = snprintf(cp, cpe - cp, " %x", *s++)) > 0)
 525                                 cp += n;
 526                         else
 527                                 *cp = '\0';
 528                 break;
 529             }
 530         }
 531         return (line);
 532 }
 533
 534 void
 535 set_metric(value, key)
 536         char *value;
 537         int key;
 538 {
 539         int flag = 0;
 540         u_long noval, *valp = &noval;
 541
 542         switch (key) {
 543 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 544         caseof(K_MTU, RTV_MTU, rmx_mtu);
 545         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 546         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 547         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 548         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 549         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 550         caseof(K_RTT, RTV_RTT, rmx_rtt);
 551         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 552         caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight);
 553         }
 554         rtm_inits |= flag;
 555         if (lockrest || locking)
 556                 rt_metrics.rmx_locks |= flag;
 557         if (locking)
 558                 locking = 0;
 559         *valp = atoi(value);
 560 }
 561
 562 void
 563 newroute(argc, argv)
 564         int argc;
 565         char **argv;
 566 {
 567         char *cmd, *dest = "", *gateway = "", *err;
 568         int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 569         int key;
 570         struct hostent *hp = 0;
 571
 572         if (uid) {
 573                 errx(EX_NOPERM, "must be root to alter routing table");
 574         }
 575         cmd = argv[0];
 576         if (*cmd != 'g' && *cmd != 's')
 577                 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 578
 579         while (--argc > 0) {
 580                 if (**(++argv)== '-') {
 581                         switch (key = keyword(1 + *argv)) {
 582                         case K_LINK:
 583                                 af = AF_LINK;
 584                                 aflen = sizeof(struct sockaddr_dl);
 585                                 break;
 586                         case K_INET:
 587                                 af = AF_INET;
 588                                 aflen = sizeof(struct sockaddr_in);
 589                                 break;
 590 #ifdef INET6
 591                         case K_INET6:
 592                                 af = AF_INET6;
 593                                 aflen = sizeof(struct sockaddr_in6);
 594                                 break;
 595 #endif
 596                         case K_ATALK:
 597                                 af = AF_APPLETALK;
 598                                 aflen = sizeof(struct sockaddr_at);
 599                                 break;
 600                         case K_SA:
 601                                 af = PF_ROUTE;
 602                                 aflen = sizeof(union sockunion);
 603                                 break;
 604                         case K_IFACE:
 605                         case K_INTERFACE:
 606                                 iflag++;
 607                                 break;
 608                         case K_NOSTATIC:
 609                                 flags &= ~RTF_STATIC;
 610                                 break;
 611                         case K_LOCK:
 612                                 locking = 1;
 613                                 break;
 614                         case K_LOCKREST:
 615                                 lockrest = 1;
 616                                 break;
 617                         case K_HOST:
 618                                 forcehost++;
 619                                 break;
 620                         case K_REJECT:
 621                                 flags |= RTF_REJECT;
 622                                 break;
 623                         case K_BLACKHOLE:
 624                                 flags |= RTF_BLACKHOLE;
 625                                 break;
 626                         case K_PROTO1:
 627                                 flags |= RTF_PROTO1;
 628                                 break;
 629                         case K_PROTO2:
 630                                 flags |= RTF_PROTO2;
 631                                 break;
 632                         case K_PROXY:
 633                                 proxy = 1;
 634                                 break;
 635                         case K_XRESOLVE:
 636                                 flags |= RTF_XRESOLVE;
 637                                 break;
 638                         case K_STATIC:
 639                                 flags |= RTF_STATIC;
 640                                 break;
 641                         case K_STICKY:
 642                                 flags |= RTF_STICKY;
 643                                 break;
 644                         case K_NOSTICK:
 645                                 flags &= ~RTF_STICKY;
 646                                 break;
 647                         case K_IFA:
 648                                 if (!--argc)
 649                                         usage((char *)NULL);
 650                                 (void) getaddr(RTA_IFA, *++argv, 0);
 651                                 break;
 652                         case K_IFP:
 653                                 if (!--argc)
 654                                         usage((char *)NULL);
 655                                 (void) getaddr(RTA_IFP, *++argv, 0);
 656                                 break;
 657                         case K_GENMASK:
 658                                 if (!--argc)
 659                                         usage((char *)NULL);
 660                                 (void) getaddr(RTA_GENMASK, *++argv, 0);
 661                                 break;
 662                         case K_GATEWAY:
 663                                 if (!--argc)
 664                                         usage((char *)NULL);
 665                                 (void) getaddr(RTA_GATEWAY, *++argv, 0);
 666                                 break;
 667                         case K_DST:
 668                                 if (!--argc)
 669                                         usage((char *)NULL);
 670                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 671                                 dest = *argv;
 672                                 break;
 673                         case K_NETMASK:
 674                                 if (!--argc)
 675                                         usage((char *)NULL);
 676                                 (void) getaddr(RTA_NETMASK, *++argv, 0);
 677                                 /* FALLTHROUGH */
 678                         case K_NET:
 679                                 forcenet++;
 680                                 break;
 681                         case K_PREFIXLEN:
 682                                 if (!--argc)
 683                                         usage((char *)NULL);
 684                                 if (prefixlen(*++argv) == -1) {
 685                                         forcenet = 0;
 686                                         ishost = 1;
 687                                 } else {
 688                                         forcenet = 1;
 689                                         ishost = 0;
 690                                 }
 691                                 break;
 692                         case K_MTU:
 693                         case K_HOPCOUNT:
 694                         case K_EXPIRE:
 695                         case K_RECVPIPE:
 696                         case K_SENDPIPE:
 697                         case K_SSTHRESH:
 698                         case K_RTT:
 699                         case K_RTTVAR:
 700                         case K_WEIGHT:
 701                                 if (!--argc)
 702                                         usage((char *)NULL);
 703                                 set_metric(*++argv, key);
 704                                 break;
 705                         default:
 706                                 usage(1+*argv);
 707                         }
 708                 } else {
 709                         if ((rtm_addrs & RTA_DST) == 0) {
 710                                 dest = *argv;
 711                                 ishost = getaddr(RTA_DST, *argv, &hp);
 712                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 713                                 gateway = *argv;
 714                                 (void) getaddr(RTA_GATEWAY, *argv, &hp);
 715                         } else {
 716                                 (void) getaddr(RTA_NETMASK, *argv, 0);
 717                                 forcenet = 1;
 718                         }
 719                 }
 720         }
 721         if (forcehost) {
 722                 ishost = 1;
 723 #ifdef INET6
 724                 if (af == AF_INET6) {
 725                         rtm_addrs &= ~RTA_NETMASK;
 726                                 memset((void *)&so_mask, 0, sizeof(so_mask));
 727                 }
 728 #endif
 729         }
 730         if (forcenet)
 731                 ishost = 0;
 732         flags |= RTF_UP;
 733         if (ishost)
 734                 flags |= RTF_HOST;
 735         if (iflag == 0)
 736                 flags |= RTF_GATEWAY;
 737         if (proxy) {
 738                 so_dst.sinarp.sin_other = SIN_PROXY;
 739                 flags |= RTF_ANNOUNCE;
 740         }
 741         for (attempts = 1; ; attempts++) {
 742                 errno = 0;
 743                 if ((ret = rtmsg(*cmd, flags)) == 0)
 744                         break;
 745                 if (errno != ENETUNREACH && errno != ESRCH)
 746                         break;
 747                 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 748                         hp->h_addr_list++;
 749                         memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0],
 750                             MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
 751                 } else
 752                         break;
 753         }
 754         if (*cmd == 'g' || *cmd == 's')
 755                 exit(ret != 0);
 756         if (!qflag) {
 757                 oerrno = errno;
 758                 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 759                 if (*gateway) {
 760                         (void) printf(": gateway %s", gateway);
 761                         if (attempts > 1 && ret == 0 && af == AF_INET)
 762                             (void) printf(" (%s)",
 763                                 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
 764                 }
 765                 if (ret == 0) {
 766                         (void) printf("\n");
 767                 } else {
 768                         switch (oerrno) {
 769                         case ESRCH:
 770                                 err = "not in table";
 771                                 break;
 772                         case EBUSY:
 773                                 err = "entry in use";
 774                                 break;
 775                         case ENOBUFS:
 776                                 err = "not enough memory";
 777                                 break;
 778                         case EADDRINUSE:
 779                                 /* handle recursion avoidance in rt_setgate() */
 780                                 err = "gateway uses the same route";
 781                                 break;
 782                         case EEXIST:
 783                                 err = "route already in table";
 784                                 break;
 785                         default:
 786                                 err = strerror(oerrno);
 787                                 break;
 788                         }
 789                         (void) printf(": %s\n", err);
 790                 }
 791         }
 792         exit(ret != 0);
 793 }
 794
 795 void
 796 inet_makenetandmask(net, sin, bits)
 797         u_long net, bits;
 798         struct sockaddr_in *sin;
 799 {
 800         u_long addr, mask = 0;
 801         char *cp;
 802
 803         rtm_addrs |= RTA_NETMASK;
 804         /*
 805          * XXX: This approach unable to handle 0.0.0.1/32 correctly
 806          * as inet_network() converts 0.0.0.1 and 1 equally.
 807          */
 808         if (net <= 0xff)
 809                 addr = net << IN_CLASSA_NSHIFT;
 810         else if (net <= 0xffff)
 811                 addr = net << IN_CLASSB_NSHIFT;
 812         else if (net <= 0xffffff)
 813                 addr = net << IN_CLASSC_NSHIFT;
 814         else
 815                 addr = net;
 816         /*
 817          * If no /xx was specified we must cacluate the
 818          * CIDR address.
 819          */
 820         if ((bits == 0)  && (addr != 0)) {
 821                 u_long i, j;
 822                 for(i=0,j=0xff; i<4; i++)  {
 823                         if (addr & j) {
 824                                 break;
 825                         }
 826                         j <<= 8;
 827                 }
 828                 /* i holds the first non zero bit */
 829                 bits = 32 - (i*8);
 830         }
 831         if (bits != 0)
 832                 mask = 0xffffffff << (32 - bits);
 833
 834         sin->sin_addr.s_addr = htonl(addr);
 835         sin = &so_mask.sin;
 836         sin->sin_addr.s_addr = htonl(mask);
 837         sin->sin_len = 0;
 838         sin->sin_family = 0;
 839         cp = (char *)(&sin->sin_addr + 1);
 840         while (*--cp == 0 && cp > (char *)sin)
 841                 ;
 842         sin->sin_len = 1 + cp - (char *)sin;
 843 }
 844
 845 #ifdef INET6
 846 /*
 847  * XXX the function may need more improvement...
 848  */
 849 static int
 850 inet6_makenetandmask(sin6, plen)
 851         struct sockaddr_in6 *sin6;
 852         char *plen;
 853 {
 854         struct in6_addr in6;
 855
 856         if (!plen) {
 857                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 858                     sin6->sin6_scope_id == 0) {
 859                         plen = "0";
 860                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 861                         /* aggregatable global unicast - RFC2374 */
 862                         memset(&in6, 0, sizeof(in6));
 863                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
 864                                     &in6.s6_addr[8], 8))
 865                                 plen = "64";
 866                 }
 867         }
 868
 869         if (!plen || strcmp(plen, "128") == 0)
 870                 return 1;
 871         rtm_addrs |= RTA_NETMASK;
 872         (void)prefixlen(plen);
 873         return 0;
 874 }
 875 #endif
 876
 877 /*
 878  * Interpret an argument as a network address of some kind,
 879  * returning 1 if a host address, 0 if a network address.
 880  */
 881 int
 882 getaddr(which, s, hpp)
 883         int which;
 884         char *s;
 885         struct hostent **hpp;
 886 {
 887         sup su;
 888         struct hostent *hp;
 889         struct netent *np;
 890         u_long val;
 891         char *q;
 892         int afamily;  /* local copy of af so we can change it */
 893
 894         if (af == 0) {
 895                 af = AF_INET;
 896                 aflen = sizeof(struct sockaddr_in);
 897         }
 898         afamily = af;
 899         rtm_addrs |= which;
 900         switch (which) {
 901         case RTA_DST:
 902                 su = &so_dst;
 903                 break;
 904         case RTA_GATEWAY:
 905                 su = &so_gate;
 906                 if (iflag) {
 907                         struct ifaddrs *ifap, *ifa;
 908                         struct sockaddr_dl *sdl = NULL;
 909
 910                         if (getifaddrs(&ifap))
 911                                 err(1, "getifaddrs");
 912
 913                         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 914                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 915                                         continue;
 916
 917                                 if (strcmp(s, ifa->ifa_name))
 918                                         continue;
 919
 920                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 921                         }
 922                         /* If we found it, then use it */
 923                         if (sdl) {
 924                                 /*
 925                                  * Copy is safe since we have a
 926                                  * sockaddr_storage member in sockunion{}.
 927                                  * Note that we need to copy before calling
 928                                  * freeifaddrs().
 929                                  */
 930                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 931                         }
 932                         freeifaddrs(ifap);
 933                         if (sdl)
 934                                 return(1);
 935                 }
 936                 break;
 937         case RTA_NETMASK:
 938                 su = &so_mask;
 939                 break;
 940         case RTA_GENMASK:
 941                 su = &so_genmask;
 942                 break;
 943         case RTA_IFP:
 944                 su = &so_ifp;
 945                 afamily = AF_LINK;
 946                 break;
 947         case RTA_IFA:
 948                 su = &so_ifa;
 949                 break;
 950         default:
 951                 usage("internal error");
 952                 /*NOTREACHED*/
 953         }
 954         su->sa.sa_len = aflen;
 955         su->sa.sa_family = afamily; /* cases that don't want it have left already */
 956         if (strcmp(s, "default") == 0) {
 957                 /*
 958                  * Default is net 0.0.0.0/0
 959                  */
 960                 switch (which) {
 961                 case RTA_DST:
 962                         forcenet++;
 963 #if 0
 964                         bzero(su, sizeof(*su)); /* for readability */
 965 #endif
 966                         (void) getaddr(RTA_NETMASK, s, 0);
 967                         break;
 968 #if 0
 969                 case RTA_NETMASK:
 970                 case RTA_GENMASK:
 971                         bzero(su, sizeof(*su)); /* for readability */
 972 #endif
 973                 }
 974                 return (0);
 975         }
 976         switch (afamily) {
 977 #ifdef INET6
 978         case AF_INET6:
 979         {
 980                 struct addrinfo hints, *res;
 981                 int ecode;
 982
 983                 q = NULL;
 984                 if (which == RTA_DST && (q = strchr(s, '/')) != NULL)
 985                         *q = '\0';
 986                 memset(&hints, 0, sizeof(hints));
 987                 hints.ai_family = afamily;      /*AF_INET6*/
 988                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
 989                 ecode = getaddrinfo(s, NULL, &hints, &res);
 990                 if (ecode != 0 || res->ai_family != AF_INET6 ||
 991                     res->ai_addrlen != sizeof(su->sin6)) {
 992                         (void) fprintf(stderr, "%s: %s\n", s,
 993                             gai_strerror(ecode));
 994                         exit(1);
 995                 }
 996                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
 997 #ifdef __KAME__
 998                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
 999                      IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) &&
1000                     su->sin6.sin6_scope_id) {
1001                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1002                                 htons(su->sin6.sin6_scope_id);
1003                         su->sin6.sin6_scope_id = 0;
1004                 }
1005 #endif
1006                 freeaddrinfo(res);
1007                 if (q != NULL)
1008                         *q++ = '/';
1009                 if (which == RTA_DST)
1010                         return (inet6_makenetandmask(&su->sin6, q));
1011                 return (0);
1012         }
1013 #endif /* INET6 */
1014
1015         case AF_APPLETALK:
1016                 if (!atalk_aton(s, &su->sat.sat_addr))
1017                         errx(EX_NOHOST, "bad address: %s", s);
1018                 rtm_addrs |= RTA_NETMASK;
1019                 return(forcehost || su->sat.sat_addr.s_node != 0);
1020
1021         case AF_LINK:
1022                 link_addr(s, &su->sdl);
1023                 return (1);
1024
1025
1026         case PF_ROUTE:
1027                 su->sa.sa_len = sizeof(*su);
1028                 sockaddr(s, &su->sa);
1029                 return (1);
1030
1031         case AF_INET:
1032         default:
1033                 break;
1034         }
1035
1036         if (hpp == NULL)
1037                 hpp = &hp;
1038         *hpp = NULL;
1039
1040         q = strchr(s,'/');
1041         if (q && which == RTA_DST) {
1042                 *q = '\0';
1043                 if ((val = inet_network(s)) != INADDR_NONE) {
1044                         inet_makenetandmask(
1045                                 val, &su->sin, strtoul(q+1, 0, 0));
1046                         return (0);
1047                 }
1048                 *q = '/';
1049         }
1050         if ((which != RTA_DST || forcenet == 0) &&
1051             inet_aton(s, &su->sin.sin_addr)) {
1052                 val = su->sin.sin_addr.s_addr;
1053                 if (which != RTA_DST || forcehost ||
1054                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1055                         return (1);
1056                 else {
1057                         val = ntohl(val);
1058                         goto netdone;
1059                 }
1060         }
1061         if (which == RTA_DST && forcehost == 0 &&
1062             ((val = inet_network(s)) != INADDR_NONE ||
1063             ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
1064 netdone:
1065                 inet_makenetandmask(val, &su->sin, 0);
1066                 return (0);
1067         }
1068         hp = gethostbyname(s);
1069         if (hp) {
1070                 *hpp = hp;
1071                 su->sin.sin_family = hp->h_addrtype;
1072                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1073                     MIN(hp->h_length, sizeof(su->sin.sin_addr)));
1074                 return (1);
1075         }
1076         errx(EX_NOHOST, "bad address: %s", s);
1077 }
1078
1079 int
1080 prefixlen(s)
1081         char *s;
1082 {
1083         int len = atoi(s), q, r;
1084         int max;
1085         char *p;
1086
1087         rtm_addrs |= RTA_NETMASK;
1088         switch (af) {
1089 #ifdef INET6
1090         case AF_INET6:
1091                 max = 128;
1092                 p = (char *)&so_mask.sin6.sin6_addr;
1093                 break;
1094 #endif
1095         case AF_INET:
1096                 max = 32;
1097                 p = (char *)&so_mask.sin.sin_addr;
1098                 break;
1099         default:
1100                 (void) fprintf(stderr, "prefixlen not supported in this af\n");
1101                 exit(1);
1102                 /*NOTREACHED*/
1103         }
1104
1105         if (len < 0 || max < len) {
1106                 (void) fprintf(stderr, "%s: bad value\n", s);
1107                 exit(1);
1108         }
1109
1110         q = len >> 3;
1111         r = len & 7;
1112         so_mask.sa.sa_family = af;
1113         so_mask.sa.sa_len = aflen;
1114         memset((void *)p, 0, max / 8);
1115         if (q > 0)
1116                 memset((void *)p, 0xff, q);
1117         if (r > 0)
1118                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1119         if (len == max)
1120                 return -1;
1121         else
1122                 return len;
1123 }
1124
1125 void
1126 interfaces()
1127 {
1128         size_t needed;
1129         int mib[6];
1130         char *buf, *lim, *next, count = 0;
1131         struct rt_msghdr *rtm;
1132
1133 retry2:
1134         mib[0] = CTL_NET;
1135         mib[1] = PF_ROUTE;
1136         mib[2] = 0;             /* protocol */
1137         mib[3] = 0;             /* wildcard address family */
1138         mib[4] = NET_RT_IFLIST;
1139         mib[5] = 0;             /* no flags */
1140         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1141                 err(EX_OSERR, "route-sysctl-estimate");
1142         if ((buf = malloc(needed)) == NULL)
1143                 errx(EX_OSERR, "malloc failed");
1144         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
1145                 if (errno == ENOMEM && count++ < 10) {
1146                         warnx("Routing table grew, retrying");
1147                         sleep(1);
1148                         free(buf);
1149                         goto retry2;
1150                 }
1151                 err(EX_OSERR, "actual retrieval of interface table");
1152         }
1153         lim = buf + needed;
1154         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1155                 rtm = (struct rt_msghdr *)next;
1156                 print_rtmsg(rtm, rtm->rtm_msglen);
1157         }
1158 }
1159
1160 void
1161 monitor()
1162 {
1163         int n;
1164         char msg[2048];
1165
1166         verbose = 1;
1167         if (debugonly) {
1168                 interfaces();
1169                 exit(0);
1170         }
1171         for(;;) {
1172                 time_t now;
1173                 n = read(s, msg, 2048);
1174                 now = time(NULL);
1175                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1176                 print_rtmsg((struct rt_msghdr *)msg, n);
1177         }
1178 }
1179
1180 struct {
1181         struct  rt_msghdr m_rtm;
1182         char    m_space[512];
1183 } m_rtmsg;
1184
1185 int
1186 rtmsg(cmd, flags)
1187         int cmd, flags;
1188 {
1189         static int seq;
1190         int rlen;
1191         char *cp = m_rtmsg.m_space;
1192         int l;
1193
1194 #define NEXTADDR(w, u) \
1195         if (rtm_addrs & (w)) {\
1196             l = SA_SIZE(&(u.sa)); memmove(cp, &(u), l); cp += l;\
1197             if (verbose) sodump(&(u),#u);\
1198         }
1199
1200         errno = 0;
1201         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1202         if (cmd == 'a')
1203                 cmd = RTM_ADD;
1204         else if (cmd == 'c')
1205                 cmd = RTM_CHANGE;
1206         else if (cmd == 'g' || cmd == 's') {
1207                 cmd = RTM_GET;
1208                 if (so_ifp.sa.sa_family == 0) {
1209                         so_ifp.sa.sa_family = AF_LINK;
1210                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1211                         rtm_addrs |= RTA_IFP;
1212                 }
1213         } else
1214                 cmd = RTM_DELETE;
1215 #define rtm m_rtmsg.m_rtm
1216         rtm.rtm_type = cmd;
1217         rtm.rtm_flags = flags;
1218         rtm.rtm_version = RTM_VERSION;
1219         rtm.rtm_seq = ++seq;
1220         rtm.rtm_addrs = rtm_addrs;
1221         rtm.rtm_rmx = rt_metrics;
1222         rtm.rtm_inits = rtm_inits;
1223
1224         if (rtm_addrs & RTA_NETMASK)
1225                 mask_addr();
1226         NEXTADDR(RTA_DST, so_dst);
1227         NEXTADDR(RTA_GATEWAY, so_gate);
1228         NEXTADDR(RTA_NETMASK, so_mask);
1229         NEXTADDR(RTA_GENMASK, so_genmask);
1230         NEXTADDR(RTA_IFP, so_ifp);
1231         NEXTADDR(RTA_IFA, so_ifa);
1232         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1233         if (verbose)
1234                 print_rtmsg(&rtm, l);
1235         if (debugonly)
1236                 return (0);
1237         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1238                 if (errno == EPERM)
1239                         err(1, "writing to routing socket");
1240                 warn("writing to routing socket");
1241                 return (-1);
1242         }
1243         if (cmd == RTM_GET) {
1244                 do {
1245                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1246                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1247                 if (l < 0)
1248                         warn("read from routing socket");
1249                 else
1250                         print_getmsg(&rtm, l);
1251         }
1252 #undef rtm
1253         return (0);
1254 }
1255
1256 void
1257 mask_addr()
1258 {
1259         int olen = so_mask.sa.sa_len;
1260         char *cp1 = olen + (char *)&so_mask, *cp2;
1261
1262         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1263                 if (*--cp1 != 0) {
1264                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1265                         break;
1266                 }
1267         if ((rtm_addrs & RTA_DST) == 0)
1268                 return;
1269         switch (so_dst.sa.sa_family) {
1270         case AF_INET:
1271 #ifdef INET6
1272         case AF_INET6:
1273 #endif
1274         case AF_APPLETALK:
1275         case 0:
1276                 return;
1277         }
1278         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1279         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1280         while (cp2 > cp1)
1281                 *--cp2 = 0;
1282         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1283         while (cp1 > so_dst.sa.sa_data)
1284                 *--cp1 &= *--cp2;
1285 }
1286
1287 char *msgtypes[] = {
1288         "",
1289         "RTM_ADD: Add Route",
1290         "RTM_DELETE: Delete Route",
1291         "RTM_CHANGE: Change Metrics or flags",
1292         "RTM_GET: Report Metrics",
1293         "RTM_LOSING: Kernel Suspects Partitioning",
1294         "RTM_REDIRECT: Told to use different route",
1295         "RTM_MISS: Lookup failed on this address",
1296         "RTM_LOCK: fix specified metrics",
1297         "RTM_OLDADD: caused by SIOCADDRT",
1298         "RTM_OLDDEL: caused by SIOCDELRT",
1299         "RTM_RESOLVE: Route created by cloning",
1300         "RTM_NEWADDR: address being added to iface",
1301         "RTM_DELADDR: address being removed from iface",
1302         "RTM_IFINFO: iface status change",
1303         "RTM_NEWMADDR: new multicast group membership on iface",
1304         "RTM_DELMADDR: multicast group membership removed from iface",
1305         "RTM_IFANNOUNCE: interface arrival/departure",
1306         0,
1307 };
1308
1309 char metricnames[] =
1310 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire"
1311 "\1mtu";
1312 char routeflags[] =
1313 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE"
1314 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE"
1315 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3"
1316 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY";
1317 char ifnetflags[] =
1318 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1319 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1320 "\017LINK2\020MULTICAST";
1321 char addrnames[] =
1322 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1323
1324 void
1325 print_rtmsg(rtm, msglen)
1326         struct rt_msghdr *rtm;
1327         int msglen;
1328 {
1329         struct if_msghdr *ifm;
1330         struct ifa_msghdr *ifam;
1331 #ifdef RTM_NEWMADDR
1332         struct ifma_msghdr *ifmam;
1333 #endif
1334         struct if_announcemsghdr *ifan;
1335         char *state;
1336
1337         if (verbose == 0)
1338                 return;
1339         if (rtm->rtm_version != RTM_VERSION) {
1340                 (void) printf("routing message version %d not understood\n",
1341                     rtm->rtm_version);
1342                 return;
1343         }
1344         if (msgtypes[rtm->rtm_type] != NULL)
1345                 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1346         else
1347                 (void)printf("#%d: ", rtm->rtm_type);
1348         (void)printf("len %d, ", rtm->rtm_msglen);
1349         switch (rtm->rtm_type) {
1350         case RTM_IFINFO:
1351                 ifm = (struct if_msghdr *)rtm;
1352                 (void) printf("if# %d, ", ifm->ifm_index);
1353                 switch (ifm->ifm_data.ifi_link_state) {
1354                 case LINK_STATE_DOWN:
1355                         state = "down";
1356                         break;
1357                 case LINK_STATE_UP:
1358                         state = "up";
1359                         break;
1360                 default:
1361                         state = "unknown";
1362                         break;
1363                 }
1364                 (void) printf("link: %s, flags:", state);
1365                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1366                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1367                 break;
1368         case RTM_NEWADDR:
1369         case RTM_DELADDR:
1370                 ifam = (struct ifa_msghdr *)rtm;
1371                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1372                 bprintf(stdout, ifam->ifam_flags, routeflags);
1373                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1374                 break;
1375 #ifdef RTM_NEWMADDR
1376         case RTM_NEWMADDR:
1377         case RTM_DELMADDR:
1378                 ifmam = (struct ifma_msghdr *)rtm;
1379                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1380                 break;
1381 #endif
1382         case RTM_IFANNOUNCE:
1383                 ifan = (struct if_announcemsghdr *)rtm;
1384                 (void) printf("if# %d, what: ", ifan->ifan_index);
1385                 switch (ifan->ifan_what) {
1386                 case IFAN_ARRIVAL:
1387                         printf("arrival");
1388                         break;
1389                 case IFAN_DEPARTURE:
1390                         printf("departure");
1391                         break;
1392                 default:
1393                         printf("#%d", ifan->ifan_what);
1394                         break;
1395                 }
1396                 printf("\n");
1397                 break;
1398
1399         default:
1400                 (void) printf("pid: %ld, seq %d, errno %d, flags:",
1401                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1402                 bprintf(stdout, rtm->rtm_flags, routeflags);
1403                 pmsg_common(rtm);
1404         }
1405 }
1406
1407 void
1408 print_getmsg(rtm, msglen)
1409         struct rt_msghdr *rtm;
1410         int msglen;
1411 {
1412         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1413         struct sockaddr_dl *ifp = NULL;
1414         struct sockaddr *sa;
1415         char *cp;
1416         int i;
1417
1418         (void) printf("   route to: %s\n", routename(&so_dst));
1419         if (rtm->rtm_version != RTM_VERSION) {
1420                 warnx("routing message version %d not understood",
1421                      rtm->rtm_version);
1422                 return;
1423         }
1424         if (rtm->rtm_msglen > msglen) {
1425                 warnx("message length mismatch, in packet %d, returned %d",
1426                       rtm->rtm_msglen, msglen);
1427         }
1428         if (rtm->rtm_errno)  {
1429                 errno = rtm->rtm_errno;
1430                 warn("message indicates error %d", errno);
1431                 return;
1432         }
1433         cp = ((char *)(rtm + 1));
1434         if (rtm->rtm_addrs)
1435                 for (i = 1; i; i <<= 1)
1436                         if (i & rtm->rtm_addrs) {
1437                                 sa = (struct sockaddr *)cp;
1438                                 switch (i) {
1439                                 case RTA_DST:
1440                                         dst = sa;
1441                                         break;
1442                                 case RTA_GATEWAY:
1443                                         gate = sa;
1444                                         break;
1445                                 case RTA_NETMASK:
1446                                         mask = sa;
1447                                         break;
1448                                 case RTA_IFP:
1449                                         if (sa->sa_family == AF_LINK &&
1450                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1451                                                 ifp = (struct sockaddr_dl *)sa;
1452                                         break;
1453                                 }
1454                                 cp += SA_SIZE(sa);
1455                         }
1456         if (dst && mask)
1457                 mask->sa_family = dst->sa_family;       /* XXX */
1458         if (dst)
1459                 (void)printf("destination: %s\n", routename(dst));
1460         if (mask) {
1461                 int savenflag = nflag;
1462
1463                 nflag = 1;
1464                 (void)printf("       mask: %s\n", routename(mask));
1465                 nflag = savenflag;
1466         }
1467         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1468                 (void)printf("    gateway: %s\n", routename(gate));
1469         if (ifp)
1470                 (void)printf("  interface: %.*s\n",
1471                     ifp->sdl_nlen, ifp->sdl_data);
1472         (void)printf("      flags: ");
1473         bprintf(stdout, rtm->rtm_flags, routeflags);
1474
1475 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1476 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1477
1478         (void) printf("\n%s\n", "\
1479  recvpipe  sendpipe  ssthresh  rtt,msec    mtu        weight    expire");
1480         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1481         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1482         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1483         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1484         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1485         printf("%8ld%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT));
1486         if (rtm->rtm_rmx.rmx_expire)
1487                 rtm->rtm_rmx.rmx_expire -= time(0);
1488         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1489 #undef lock
1490 #undef msec
1491 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1492         if (verbose)
1493                 pmsg_common(rtm);
1494         else if (rtm->rtm_addrs &~ RTA_IGN) {
1495                 (void) printf("sockaddrs: ");
1496                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1497                 putchar('\n');
1498         }
1499 #undef  RTA_IGN
1500 }
1501
1502 void
1503 pmsg_common(rtm)
1504         struct rt_msghdr *rtm;
1505 {
1506         (void) printf("\nlocks: ");
1507         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1508         (void) printf(" inits: ");
1509         bprintf(stdout, rtm->rtm_inits, metricnames);
1510         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1511 }
1512
1513 void
1514 pmsg_addrs(cp, addrs)
1515         char    *cp;
1516         int     addrs;
1517 {
1518         struct sockaddr *sa;
1519         int i;
1520
1521         if (addrs == 0) {
1522                 (void) putchar('\n');
1523                 return;
1524         }
1525         (void) printf("\nsockaddrs: ");
1526         bprintf(stdout, addrs, addrnames);
1527         (void) putchar('\n');
1528         for (i = 1; i; i <<= 1)
1529                 if (i & addrs) {
1530                         sa = (struct sockaddr *)cp;
1531                         (void) printf(" %s", routename(sa));
1532                         cp += SA_SIZE(sa);
1533                 }
1534         (void) putchar('\n');
1535         (void) fflush(stdout);
1536 }
1537
1538 void
1539 bprintf(fp, b, s)
1540         FILE *fp;
1541         int b;
1542         u_char *s;
1543 {
1544         int i;
1545         int gotsome = 0;
1546
1547         if (b == 0)
1548                 return;
1549         while ((i = *s++) != 0) {
1550                 if (b & (1 << (i-1))) {
1551                         if (gotsome == 0)
1552                                 i = '<';
1553                         else
1554                                 i = ',';
1555                         (void) putc(i, fp);
1556                         gotsome = 1;
1557                         for (; (i = *s) > 32; s++)
1558                                 (void) putc(i, fp);
1559                 } else
1560                         while (*s > 32)
1561                                 s++;
1562         }
1563         if (gotsome)
1564                 (void) putc('>', fp);
1565 }
1566
1567 int
1568 keyword(cp)
1569         char *cp;
1570 {
1571         struct keytab *kt = keywords;
1572
1573         while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1574                 kt++;
1575         return kt->kt_i;
1576 }
1577
1578 void
1579 sodump(su, which)
1580         sup su;
1581         char *which;
1582 {
1583         switch (su->sa.sa_family) {
1584         case AF_LINK:
1585                 (void) printf("%s: link %s; ",
1586                     which, link_ntoa(&su->sdl));
1587                 break;
1588         case AF_INET:
1589                 (void) printf("%s: inet %s; ",
1590                     which, inet_ntoa(su->sin.sin_addr));
1591                 break;
1592         case AF_APPLETALK:
1593                 (void) printf("%s: atalk %s; ",
1594                     which, atalk_ntoa(su->sat.sat_addr));
1595                 break;
1596         }
1597         (void) fflush(stdout);
1598 }
1599
1600 /* States*/
1601 #define VIRGIN  0
1602 #define GOTONE  1
1603 #define GOTTWO  2
1604 /* Inputs */
1605 #define DIGIT   (4*0)
1606 #define END     (4*1)
1607 #define DELIM   (4*2)
1608
1609 void
1610 sockaddr(addr, sa)
1611         char *addr;
1612         struct sockaddr *sa;
1613 {
1614         char *cp = (char *)sa;
1615         int size = sa->sa_len;
1616         char *cplim = cp + size;
1617         int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1618
1619         memset(cp, 0, size);
1620         cp++;
1621         do {
1622                 if ((*addr >= '0') && (*addr <= '9')) {
1623                         new = *addr - '0';
1624                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1625                         new = *addr - 'a' + 10;
1626                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1627                         new = *addr - 'A' + 10;
1628                 } else if (*addr == 0)
1629                         state |= END;
1630                 else
1631                         state |= DELIM;
1632                 addr++;
1633                 switch (state /* | INPUT */) {
1634                 case GOTTWO | DIGIT:
1635                         *cp++ = byte; /*FALLTHROUGH*/
1636                 case VIRGIN | DIGIT:
1637                         state = GOTONE; byte = new; continue;
1638                 case GOTONE | DIGIT:
1639                         state = GOTTWO; byte = new + (byte << 4); continue;
1640                 default: /* | DELIM */
1641                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1642                 case GOTONE | END:
1643                 case GOTTWO | END:
1644                         *cp++ = byte; /* FALLTHROUGH */
1645                 case VIRGIN | END:
1646                         break;
1647                 }
1648                 break;
1649         } while (cp < cplim);
1650         sa->sa_len = cp - (char *)sa;
1651 }
1652
1653 int
1654 atalk_aton(const char *text, struct at_addr *addr)
1655 {
1656         u_int net, node;
1657
1658         if (sscanf(text, "%u.%u", &net, &node) != 2
1659             || net > 0xffff || node > 0xff)
1660                 return(0);
1661         addr->s_net = htons(net);
1662         addr->s_node = node;
1663         return(1);
1664 }
1665
1666 char *
1667 atalk_ntoa(struct at_addr at)
1668 {
1669         static char buf[20];
1670
1671         (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1672         return(buf);
1673 }