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_DEL:
 178                 case K_DELETE:
 179                         newroute(argc, argv);
 180                         /* NOTREACHED */
 181
 182                 case K_MONITOR:
 183                         monitor();
 184                         /* NOTREACHED */
 185
 186                 case K_FLUSH:
 187                         flushroutes(argc, argv);
 188                         exit(0);
 189                         /* NOTREACHED */
 190                 }
 191         usage(*argv);
 192         /* NOTREACHED */
 193 }
 194
 195 /*
 196  * Purge all entries in the routing tables not
 197  * associated with network interfaces.
 198  */
 199 void
 200 flushroutes(argc, argv)
 201         int argc;
 202         char *argv[];
 203 {
 204         size_t needed;
 205         int mib[6], rlen, seqno, count = 0;
 206         char *buf, *next, *lim;
 207         struct rt_msghdr *rtm;
 208
 209         if (uid && !debugonly) {
 210                 errx(EX_NOPERM, "must be root to alter routing table");
 211         }
 212         shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 213         if (argc > 1) {
 214                 argv++;
 215                 if (argc == 2 && **argv == '-')
 216                     switch (keyword(*argv + 1)) {
 217                         case K_INET:
 218                                 af = AF_INET;
 219                                 break;
 220 #ifdef INET6
 221                         case K_INET6:
 222                                 af = AF_INET6;
 223                                 break;
 224 #endif
 225                         case K_ATALK:
 226                                 af = AF_APPLETALK;
 227                                 break;
 228                         case K_LINK:
 229                                 af = AF_LINK;
 230                                 break;
 231                         default:
 232                                 goto bad;
 233                 } else
 234 bad:                    usage(*argv);
 235         }
 236 retry:
 237         mib[0] = CTL_NET;
 238         mib[1] = PF_ROUTE;
 239         mib[2] = 0;             /* protocol */
 240         mib[3] = 0;             /* wildcard address family */
 241         mib[4] = NET_RT_DUMP;
 242         mib[5] = 0;             /* no flags */
 243         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 244                 err(EX_OSERR, "route-sysctl-estimate");
 245         if ((buf = malloc(needed)) == NULL)
 246                 errx(EX_OSERR, "malloc failed");
 247         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
 248                 if (errno == ENOMEM && count++ < 10) {
 249                         warnx("Routing table grew, retrying");
 250                         sleep(1);
 251                         free(buf);
 252                         goto retry;
 253                 }
 254                 err(EX_OSERR, "route-sysctl-get");
 255         }
 256         lim = buf + needed;
 257         if (verbose)
 258                 (void) printf("Examining routing table from sysctl\n");
 259         seqno = 0;              /* ??? */
 260         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 261                 rtm = (struct rt_msghdr *)next;
 262                 if (verbose)
 263                         print_rtmsg(rtm, rtm->rtm_msglen);
 264                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 265                         continue;
 266                 if (af) {
 267                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 268
 269                         if (sa->sa_family != af)
 270                                 continue;
 271                 }
 272                 if (debugonly)
 273                         continue;
 274                 rtm->rtm_type = RTM_DELETE;
 275                 rtm->rtm_seq = seqno;
 276                 rlen = write(s, next, rtm->rtm_msglen);
 277                 if (rlen < 0 && errno == EPERM)
 278                         err(1, "write to routing socket");
 279                 if (rlen < (int)rtm->rtm_msglen) {
 280                         warn("write to routing socket");
 281                         (void) printf("got only %d for rlen\n", rlen);
 282                         free(buf);
 283                         goto retry;
 284                         break;
 285                 }
 286                 seqno++;
 287                 if (qflag)
 288                         continue;
 289                 if (verbose)
 290                         print_rtmsg(rtm, rlen);
 291                 else {
 292                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 293                         (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 294                             routename(sa) : netname(sa));
 295                         sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
 296                         (void) printf("%-20.20s ", routename(sa));
 297                         (void) printf("done\n");
 298                 }
 299         }
 300 }
 301
 302 const char *
 303 routename(sa)
 304         struct sockaddr *sa;
 305 {
 306         char *cp;
 307         static char line[MAXHOSTNAMELEN + 1];
 308         struct hostent *hp;
 309         static char domain[MAXHOSTNAMELEN + 1];
 310         static int first = 1, n;
 311
 312         if (first) {
 313                 first = 0;
 314                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 315                     (cp = strchr(domain, '.'))) {
 316                         domain[MAXHOSTNAMELEN] = '\0';
 317                         (void) strcpy(domain, cp + 1);
 318                 } else
 319                         domain[0] = 0;
 320         }
 321
 322         if (sa->sa_len == 0)
 323                 strcpy(line, "default");
 324         else switch (sa->sa_family) {
 325
 326         case AF_INET:
 327             {   struct in_addr in;
 328                 in = ((struct sockaddr_in *)sa)->sin_addr;
 329
 330                 cp = 0;
 331                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 332                         cp = "default";
 333                 if (cp == 0 && !nflag) {
 334                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 335                                 AF_INET);
 336                         if (hp) {
 337                                 if ((cp = strchr(hp->h_name, '.')) &&
 338                                     !strcmp(cp + 1, domain))
 339                                         *cp = 0;
 340                                 cp = hp->h_name;
 341                         }
 342                 }
 343                 if (cp) {
 344                         strncpy(line, cp, sizeof(line) - 1);
 345                         line[sizeof(line) - 1] = '\0';
 346                 } else
 347                         (void) sprintf(line, "%s", inet_ntoa(in));
 348                 break;
 349             }
 350
 351 #ifdef INET6
 352         case AF_INET6:
 353         {
 354                 struct sockaddr_in6 sin6; /* use static var for safety */
 355                 int niflags = 0;
 356
 357                 memset(&sin6, 0, sizeof(sin6));
 358                 memcpy(&sin6, sa, sa->sa_len);
 359                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 360                 sin6.sin6_family = AF_INET6;
 361 #ifdef __KAME__
 362                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 363                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 364                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 365                     sin6.sin6_scope_id == 0) {
 366                         sin6.sin6_scope_id =
 367                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 368                         sin6.sin6_addr.s6_addr[2] = 0;
 369                         sin6.sin6_addr.s6_addr[3] = 0;
 370                 }
 371 #endif
 372                 if (nflag)
 373                         niflags |= NI_NUMERICHOST;
 374                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 375                     line, sizeof(line), NULL, 0, niflags) != 0)
 376                         strncpy(line, "invalid", sizeof(line));
 377
 378                 return(line);
 379         }
 380 #endif
 381
 382         case AF_APPLETALK:
 383                 (void) snprintf(line, sizeof(line), "atalk %s",
 384                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 385                 break;
 386
 387         case AF_LINK:
 388                 return (link_ntoa((struct sockaddr_dl *)sa));
 389
 390         default:
 391             {   u_short *s = (u_short *)sa;
 392                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 393                 char *cp = line + sprintf(line, "(%d)", sa->sa_family);
 394                 char *cpe = line + sizeof(line);
 395
 396                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 397                         if ((n = snprintf(cp, cpe - cp, " %x", *s)) > 0)
 398                                 cp += n;
 399                         else
 400                                 *cp = '\0';
 401                 break;
 402             }
 403         }
 404         return (line);
 405 }
 406
 407 /*
 408  * Return the name of the network whose address is given.
 409  * The address is assumed to be that of a net or subnet, not a host.
 410  */
 411 const char *
 412 netname(sa)
 413         struct sockaddr *sa;
 414 {
 415         char *cp = 0;
 416         static char line[MAXHOSTNAMELEN + 1];
 417         struct netent *np = 0;
 418         u_long net, mask;
 419         u_long i;
 420         int n, subnetshift;
 421
 422         switch (sa->sa_family) {
 423
 424         case AF_INET:
 425             {   struct in_addr in;
 426                 in = ((struct sockaddr_in *)sa)->sin_addr;
 427
 428                 i = in.s_addr = ntohl(in.s_addr);
 429                 if (in.s_addr == 0)
 430                         cp = "default";
 431                 else if (!nflag) {
 432                         if (IN_CLASSA(i)) {
 433                                 mask = IN_CLASSA_NET;
 434                                 subnetshift = 8;
 435                         } else if (IN_CLASSB(i)) {
 436                                 mask = IN_CLASSB_NET;
 437                                 subnetshift = 8;
 438                         } else {
 439                                 mask = IN_CLASSC_NET;
 440                                 subnetshift = 4;
 441                         }
 442                         /*
 443                          * If there are more bits than the standard mask
 444                          * would suggest, subnets must be in use.
 445                          * Guess at the subnet mask, assuming reasonable
 446                          * width subnet fields.
 447                          */
 448                         while (in.s_addr &~ mask)
 449                                 mask = (long)mask >> subnetshift;
 450                         net = in.s_addr & mask;
 451                         while ((mask & 1) == 0)
 452                                 mask >>= 1, net >>= 1;
 453                         np = getnetbyaddr(net, AF_INET);
 454                         if (np)
 455                                 cp = np->n_name;
 456                 }
 457 #define C(x)    (unsigned)((x) & 0xff)
 458                 if (cp)
 459                         strncpy(line, cp, sizeof(line));
 460                 else if ((in.s_addr & 0xffffff) == 0)
 461                         (void) sprintf(line, "%u", C(in.s_addr >> 24));
 462                 else if ((in.s_addr & 0xffff) == 0)
 463                         (void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
 464                             C(in.s_addr >> 16));
 465                 else if ((in.s_addr & 0xff) == 0)
 466                         (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 467                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 468                 else
 469                         (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 470                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 471                             C(in.s_addr));
 472 #undef C
 473                 break;
 474             }
 475
 476 #ifdef INET6
 477         case AF_INET6:
 478         {
 479                 struct sockaddr_in6 sin6; /* use static var for safety */
 480                 int niflags = 0;
 481
 482                 memset(&sin6, 0, sizeof(sin6));
 483                 memcpy(&sin6, sa, sa->sa_len);
 484                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 485                 sin6.sin6_family = AF_INET6;
 486 #ifdef __KAME__
 487                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 488                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 489                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 490                     sin6.sin6_scope_id == 0) {
 491                         sin6.sin6_scope_id =
 492                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 493                         sin6.sin6_addr.s6_addr[2] = 0;
 494                         sin6.sin6_addr.s6_addr[3] = 0;
 495                 }
 496 #endif
 497                 if (nflag)
 498                         niflags |= NI_NUMERICHOST;
 499                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 500                     line, sizeof(line), NULL, 0, niflags) != 0)
 501                         strncpy(line, "invalid", sizeof(line));
 502
 503                 return(line);
 504         }
 505 #endif
 506
 507         case AF_APPLETALK:
 508                 (void) snprintf(line, sizeof(line), "atalk %s",
 509                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 510                 break;
 511
 512         case AF_LINK:
 513                 return (link_ntoa((struct sockaddr_dl *)sa));
 514
 515
 516         default:
 517             {   u_short *s = (u_short *)sa->sa_data;
 518                 u_short *slim = s + ((sa->sa_len + 1)>>1);
 519                 char *cp = line + sprintf(line, "af %d:", sa->sa_family);
 520                 char *cpe = line + sizeof(line);
 521
 522                 while (s < slim && cp < cpe)
 523                         if ((n = snprintf(cp, cpe - cp, " %x", *s++)) > 0)
 524                                 cp += n;
 525                         else
 526                                 *cp = '\0';
 527                 break;
 528             }
 529         }
 530         return (line);
 531 }
 532
 533 void
 534 set_metric(value, key)
 535         char *value;
 536         int key;
 537 {
 538         int flag = 0;
 539         u_long noval, *valp = &noval;
 540
 541         switch (key) {
 542 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 543         caseof(K_MTU, RTV_MTU, rmx_mtu);
 544         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 545         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 546         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 547         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 548         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 549         caseof(K_RTT, RTV_RTT, rmx_rtt);
 550         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 551         }
 552         rtm_inits |= flag;
 553         if (lockrest || locking)
 554                 rt_metrics.rmx_locks |= flag;
 555         if (locking)
 556                 locking = 0;
 557         *valp = atoi(value);
 558 }
 559
 560 void
 561 newroute(argc, argv)
 562         int argc;
 563         char **argv;
 564 {
 565         char *cmd, *dest = "", *gateway = "", *err;
 566         int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 567         int key;
 568         struct hostent *hp = 0;
 569
 570         if (uid) {
 571                 errx(EX_NOPERM, "must be root to alter routing table");
 572         }
 573         cmd = argv[0];
 574         if (*cmd != 'g')
 575                 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 576         while (--argc > 0) {
 577                 if (**(++argv)== '-') {
 578                         switch (key = keyword(1 + *argv)) {
 579                         case K_LINK:
 580                                 af = AF_LINK;
 581                                 aflen = sizeof(struct sockaddr_dl);
 582                                 break;
 583                         case K_INET:
 584                                 af = AF_INET;
 585                                 aflen = sizeof(struct sockaddr_in);
 586                                 break;
 587 #ifdef INET6
 588                         case K_INET6:
 589                                 af = AF_INET6;
 590                                 aflen = sizeof(struct sockaddr_in6);
 591                                 break;
 592 #endif
 593                         case K_ATALK:
 594                                 af = AF_APPLETALK;
 595                                 aflen = sizeof(struct sockaddr_at);
 596                                 break;
 597                         case K_SA:
 598                                 af = PF_ROUTE;
 599                                 aflen = sizeof(union sockunion);
 600                                 break;
 601                         case K_IFACE:
 602                         case K_INTERFACE:
 603                                 iflag++;
 604                                 break;
 605                         case K_NOSTATIC:
 606                                 flags &= ~RTF_STATIC;
 607                                 break;
 608                         case K_LLINFO:
 609                                 flags |= RTF_LLINFO;
 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_CLONING:
 636                                 flags |= RTF_CLONING;
 637                                 break;
 638                         case K_XRESOLVE:
 639                                 flags |= RTF_XRESOLVE;
 640                                 break;
 641                         case K_STATIC:
 642                                 flags |= RTF_STATIC;
 643                                 break;
 644                         case K_IFA:
 645                                 if (!--argc)
 646                                         usage((char *)NULL);
 647                                 (void) getaddr(RTA_IFA, *++argv, 0);
 648                                 break;
 649                         case K_IFP:
 650                                 if (!--argc)
 651                                         usage((char *)NULL);
 652                                 (void) getaddr(RTA_IFP, *++argv, 0);
 653                                 break;
 654                         case K_GENMASK:
 655                                 if (!--argc)
 656                                         usage((char *)NULL);
 657                                 (void) getaddr(RTA_GENMASK, *++argv, 0);
 658                                 break;
 659                         case K_GATEWAY:
 660                                 if (!--argc)
 661                                         usage((char *)NULL);
 662                                 (void) getaddr(RTA_GATEWAY, *++argv, 0);
 663                                 break;
 664                         case K_DST:
 665                                 if (!--argc)
 666                                         usage((char *)NULL);
 667                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 668                                 dest = *argv;
 669                                 break;
 670                         case K_NETMASK:
 671                                 if (!--argc)
 672                                         usage((char *)NULL);
 673                                 (void) getaddr(RTA_NETMASK, *++argv, 0);
 674                                 /* FALLTHROUGH */
 675                         case K_NET:
 676                                 forcenet++;
 677                                 break;
 678                         case K_PREFIXLEN:
 679                                 if (!--argc)
 680                                         usage((char *)NULL);
 681                                 if (prefixlen(*++argv) == -1) {
 682                                         forcenet = 0;
 683                                         ishost = 1;
 684                                 } else {
 685                                         forcenet = 1;
 686                                         ishost = 0;
 687                                 }
 688                                 break;
 689                         case K_MTU:
 690                         case K_HOPCOUNT:
 691                         case K_EXPIRE:
 692                         case K_RECVPIPE:
 693                         case K_SENDPIPE:
 694                         case K_SSTHRESH:
 695                         case K_RTT:
 696                         case K_RTTVAR:
 697                                 if (!--argc)
 698                                         usage((char *)NULL);
 699                                 set_metric(*++argv, key);
 700                                 break;
 701                         default:
 702                                 usage(1+*argv);
 703                         }
 704                 } else {
 705                         if ((rtm_addrs & RTA_DST) == 0) {
 706                                 dest = *argv;
 707                                 ishost = getaddr(RTA_DST, *argv, &hp);
 708                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 709                                 gateway = *argv;
 710                                 (void) getaddr(RTA_GATEWAY, *argv, &hp);
 711                         } else {
 712                                 (void) getaddr(RTA_NETMASK, *argv, 0);
 713                                 forcenet = 1;
 714                         }
 715                 }
 716         }
 717         if (forcehost) {
 718                 ishost = 1;
 719 #ifdef INET6
 720                 if (af == AF_INET6) {
 721                         rtm_addrs &= ~RTA_NETMASK;
 722                         memset((void *)&so_mask, 0, sizeof(so_mask));
 723                 }
 724 #endif
 725         }
 726         if (forcenet)
 727                 ishost = 0;
 728         flags |= RTF_UP;
 729         if (ishost)
 730                 flags |= RTF_HOST;
 731         if (iflag == 0)
 732                 flags |= RTF_GATEWAY;
 733         if (proxy) {
 734                 so_dst.sinarp.sin_other = SIN_PROXY;
 735                 flags |= RTF_ANNOUNCE;
 736         }
 737         for (attempts = 1; ; attempts++) {
 738                 errno = 0;
 739                 if ((ret = rtmsg(*cmd, flags)) == 0)
 740                         break;
 741                 if (errno != ENETUNREACH && errno != ESRCH)
 742                         break;
 743                 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 744                         hp->h_addr_list++;
 745                         memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0],
 746                             MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
 747                 } else
 748                         break;
 749         }
 750         if (*cmd == 'g')
 751                 exit(ret != 0);
 752         if (!qflag) {
 753                 oerrno = errno;
 754                 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 755                 if (*gateway) {
 756                         (void) printf(": gateway %s", gateway);
 757                         if (attempts > 1 && ret == 0 && af == AF_INET)
 758                             (void) printf(" (%s)",
 759                                 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
 760                 }
 761                 if (ret == 0) {
 762                         (void) printf("\n");
 763                 } else {
 764                         switch (oerrno) {
 765                         case ESRCH:
 766                                 err = "not in table";
 767                                 break;
 768                         case EBUSY:
 769                                 err = "entry in use";
 770                                 break;
 771                         case ENOBUFS:
 772                                 err = "not enough memory";
 773                                 break;
 774                         case EADDRINUSE:
 775                                 /* handle recursion avoidance in rt_setgate() */
 776                                 err = "gateway uses the same route";
 777                                 break;
 778                         case EEXIST:
 779                                 err = "route already in table";
 780                                 break;
 781                         default:
 782                                 err = strerror(oerrno);
 783                                 break;
 784                         }
 785                         (void) printf(": %s\n", err);
 786                 }
 787         }
 788         exit(ret != 0);
 789 }
 790
 791 void
 792 inet_makenetandmask(net, sin, bits)
 793         u_long net, bits;
 794         struct sockaddr_in *sin;
 795 {
 796         u_long addr, mask = 0;
 797         char *cp;
 798
 799         rtm_addrs |= RTA_NETMASK;
 800         /*
 801          * XXX: This approach unable to handle 0.0.0.1/32 correctly
 802          * as inet_network() converts 0.0.0.1 and 1 equally.
 803          */
 804         if (net <= 0xff)
 805                 addr = net << IN_CLASSA_NSHIFT;
 806         else if (net <= 0xffff)
 807                 addr = net << IN_CLASSB_NSHIFT;
 808         else if (net <= 0xffffff)
 809                 addr = net << IN_CLASSC_NSHIFT;
 810         else
 811                 addr = net;
 812
 813         if (bits != 0)
 814                 mask = 0xffffffff << (32 - bits);
 815         else if (net == 0)
 816                 mask = 0;
 817         else if (IN_CLASSA(addr))
 818                 mask = IN_CLASSA_NET;
 819         else if (IN_CLASSB(addr))
 820                 mask = IN_CLASSB_NET;
 821         else if (IN_CLASSC(addr))
 822                 mask = IN_CLASSC_NET;
 823         else if (IN_MULTICAST(addr))
 824                 mask = IN_CLASSD_NET;
 825         else
 826                 mask = 0xffffffff;
 827
 828         sin->sin_addr.s_addr = htonl(addr);
 829         sin = &so_mask.sin;
 830         sin->sin_addr.s_addr = htonl(mask);
 831         sin->sin_len = 0;
 832         sin->sin_family = 0;
 833         cp = (char *)(&sin->sin_addr + 1);
 834         while (*--cp == 0 && cp > (char *)sin)
 835                 ;
 836         sin->sin_len = 1 + cp - (char *)sin;
 837 }
 838
 839 #ifdef INET6
 840 /*
 841  * XXX the function may need more improvement...
 842  */
 843 static int
 844 inet6_makenetandmask(sin6, plen)
 845         struct sockaddr_in6 *sin6;
 846         char *plen;
 847 {
 848         struct in6_addr in6;
 849
 850         if (!plen) {
 851                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 852                     sin6->sin6_scope_id == 0) {
 853                         plen = "0";
 854                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 855                         /* aggregatable global unicast - RFC2374 */
 856                         memset(&in6, 0, sizeof(in6));
 857                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
 858                                     &in6.s6_addr[8], 8))
 859                                 plen = "64";
 860                 }
 861         }
 862
 863         if (!plen || strcmp(plen, "128") == 0)
 864                 return 1;
 865         rtm_addrs |= RTA_NETMASK;
 866         (void)prefixlen(plen);
 867         return 0;
 868 }
 869 #endif
 870
 871 /*
 872  * Interpret an argument as a network address of some kind,
 873  * returning 1 if a host address, 0 if a network address.
 874  */
 875 int
 876 getaddr(which, s, hpp)
 877         int which;
 878         char *s;
 879         struct hostent **hpp;
 880 {
 881         sup su;
 882         struct hostent *hp;
 883         struct netent *np;
 884         u_long val;
 885         char *q;
 886         int afamily;  /* local copy of af so we can change it */
 887
 888         if (af == 0) {
 889                 af = AF_INET;
 890                 aflen = sizeof(struct sockaddr_in);
 891         }
 892         afamily = af;
 893         rtm_addrs |= which;
 894         switch (which) {
 895         case RTA_DST:
 896                 su = &so_dst;
 897                 break;
 898         case RTA_GATEWAY:
 899                 su = &so_gate;
 900                 if (iflag) {
 901                         struct ifaddrs *ifap, *ifa;
 902                         struct sockaddr_dl *sdl = NULL;
 903
 904                         if (getifaddrs(&ifap))
 905                                 err(1, "getifaddrs");
 906
 907                         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 908                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 909                                         continue;
 910
 911                                 if (strcmp(s, ifa->ifa_name))
 912                                         continue;
 913
 914                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 915                         }
 916                         /* If we found it, then use it */
 917                         if (sdl) {
 918                                 /*
 919                                  * Copy is safe since we have a
 920                                  * sockaddr_storage member in sockunion{}.
 921                                  * Note that we need to copy before calling
 922                                  * freeifaddrs().
 923                                  */
 924                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 925                         }
 926                         freeifaddrs(ifap);
 927                         if (sdl)
 928                                 return(1);
 929                 }
 930                 break;
 931         case RTA_NETMASK:
 932                 su = &so_mask;
 933                 break;
 934         case RTA_GENMASK:
 935                 su = &so_genmask;
 936                 break;
 937         case RTA_IFP:
 938                 su = &so_ifp;
 939                 afamily = AF_LINK;
 940                 break;
 941         case RTA_IFA:
 942                 su = &so_ifa;
 943                 break;
 944         default:
 945                 usage("internal error");
 946                 /*NOTREACHED*/
 947         }
 948         su->sa.sa_len = aflen;
 949         su->sa.sa_family = afamily; /* cases that don't want it have left already */
 950         if (strcmp(s, "default") == 0) {
 951                 /*
 952                  * Default is net 0.0.0.0/0
 953                  */
 954                 switch (which) {
 955                 case RTA_DST:
 956                         forcenet++;
 957 #if 0
 958                         bzero(su, sizeof(*su)); /* for readability */
 959 #endif
 960                         (void) getaddr(RTA_NETMASK, s, 0);
 961                         break;
 962 #if 0
 963                 case RTA_NETMASK:
 964                 case RTA_GENMASK:
 965                         bzero(su, sizeof(*su)); /* for readability */
 966 #endif
 967                 }
 968                 return (0);
 969         }
 970         switch (afamily) {
 971 #ifdef INET6
 972         case AF_INET6:
 973         {
 974                 struct addrinfo hints, *res;
 975                 int ecode;
 976
 977                 q = NULL;
 978                 if (which == RTA_DST && (q = strchr(s, '/')) != NULL)
 979                         *q = '\0';
 980                 memset(&hints, 0, sizeof(hints));
 981                 hints.ai_family = afamily;      /*AF_INET6*/
 982                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
 983                 ecode = getaddrinfo(s, NULL, &hints, &res);
 984                 if (ecode != 0 || res->ai_family != AF_INET6 ||
 985                     res->ai_addrlen != sizeof(su->sin6)) {
 986                         (void) fprintf(stderr, "%s: %s\n", s,
 987                             gai_strerror(ecode));
 988                         exit(1);
 989                 }
 990                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
 991 #ifdef __KAME__
 992                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
 993                      IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) &&
 994                     su->sin6.sin6_scope_id) {
 995                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
 996                                 htons(su->sin6.sin6_scope_id);
 997                         su->sin6.sin6_scope_id = 0;
 998                 }
 999 #endif
1000                 freeaddrinfo(res);
1001                 if (q != NULL)
1002                         *q++ = '/';
1003                 if (which == RTA_DST)
1004                         return (inet6_makenetandmask(&su->sin6, q));
1005                 return (0);
1006         }
1007 #endif /* INET6 */
1008
1009         case AF_APPLETALK:
1010                 if (!atalk_aton(s, &su->sat.sat_addr))
1011                         errx(EX_NOHOST, "bad address: %s", s);
1012                 rtm_addrs |= RTA_NETMASK;
1013                 return(forcehost || su->sat.sat_addr.s_node != 0);
1014
1015         case AF_LINK:
1016                 link_addr(s, &su->sdl);
1017                 return (1);
1018
1019
1020         case PF_ROUTE:
1021                 su->sa.sa_len = sizeof(*su);
1022                 sockaddr(s, &su->sa);
1023                 return (1);
1024
1025         case AF_INET:
1026         default:
1027                 break;
1028         }
1029
1030         if (hpp == NULL)
1031                 hpp = &hp;
1032         *hpp = NULL;
1033
1034         q = strchr(s,'/');
1035         if (q && which == RTA_DST) {
1036                 *q = '\0';
1037                 if ((val = inet_network(s)) != INADDR_NONE) {
1038                         inet_makenetandmask(
1039                                 val, &su->sin, strtoul(q+1, 0, 0));
1040                         return (0);
1041                 }
1042                 *q = '/';
1043         }
1044         if ((which != RTA_DST || forcenet == 0) &&
1045             inet_aton(s, &su->sin.sin_addr)) {
1046                 val = su->sin.sin_addr.s_addr;
1047                 if (which != RTA_DST || forcehost ||
1048                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1049                         return (1);
1050                 else {
1051                         val = ntohl(val);
1052                         goto netdone;
1053                 }
1054         }
1055         if (which == RTA_DST && forcehost == 0 &&
1056             ((val = inet_network(s)) != INADDR_NONE ||
1057             ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
1058 netdone:
1059                 inet_makenetandmask(val, &su->sin, 0);
1060                 return (0);
1061         }
1062         hp = gethostbyname(s);
1063         if (hp) {
1064                 *hpp = hp;
1065                 su->sin.sin_family = hp->h_addrtype;
1066                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1067                     MIN(hp->h_length, sizeof(su->sin.sin_addr)));
1068                 return (1);
1069         }
1070         errx(EX_NOHOST, "bad address: %s", s);
1071 }
1072
1073 int
1074 prefixlen(s)
1075         char *s;
1076 {
1077         int len = atoi(s), q, r;
1078         int max;
1079         char *p;
1080
1081         rtm_addrs |= RTA_NETMASK;
1082         switch (af) {
1083 #ifdef INET6
1084         case AF_INET6:
1085                 max = 128;
1086                 p = (char *)&so_mask.sin6.sin6_addr;
1087                 break;
1088 #endif
1089         case AF_INET:
1090                 max = 32;
1091                 p = (char *)&so_mask.sin.sin_addr;
1092                 break;
1093         default:
1094                 (void) fprintf(stderr, "prefixlen not supported in this af\n");
1095                 exit(1);
1096                 /*NOTREACHED*/
1097         }
1098
1099         if (len < 0 || max < len) {
1100                 (void) fprintf(stderr, "%s: bad value\n", s);
1101                 exit(1);
1102         }
1103
1104         q = len >> 3;
1105         r = len & 7;
1106         so_mask.sa.sa_family = af;
1107         so_mask.sa.sa_len = aflen;
1108         memset((void *)p, 0, max / 8);
1109         if (q > 0)
1110                 memset((void *)p, 0xff, q);
1111         if (r > 0)
1112                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1113         if (len == max)
1114                 return -1;
1115         else
1116                 return len;
1117 }
1118
1119 void
1120 interfaces()
1121 {
1122         size_t needed;
1123         int mib[6];
1124         char *buf, *lim, *next, count = 0;
1125         struct rt_msghdr *rtm;
1126
1127 retry2:
1128         mib[0] = CTL_NET;
1129         mib[1] = PF_ROUTE;
1130         mib[2] = 0;             /* protocol */
1131         mib[3] = 0;             /* wildcard address family */
1132         mib[4] = NET_RT_IFLIST;
1133         mib[5] = 0;             /* no flags */
1134         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1135                 err(EX_OSERR, "route-sysctl-estimate");
1136         if ((buf = malloc(needed)) == NULL)
1137                 errx(EX_OSERR, "malloc failed");
1138         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
1139                 if (errno == ENOMEM && count++ < 10) {
1140                         warnx("Routing table grew, retrying");
1141                         sleep(1);
1142                         free(buf);
1143                         goto retry2;
1144                 }
1145                 err(EX_OSERR, "actual retrieval of interface table");
1146         }
1147         lim = buf + needed;
1148         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1149                 rtm = (struct rt_msghdr *)next;
1150                 print_rtmsg(rtm, rtm->rtm_msglen);
1151         }
1152 }
1153
1154 void
1155 monitor()
1156 {
1157         int n;
1158         char msg[2048];
1159
1160         verbose = 1;
1161         if (debugonly) {
1162                 interfaces();
1163                 exit(0);
1164         }
1165         for(;;) {
1166                 time_t now;
1167                 n = read(s, msg, 2048);
1168                 now = time(NULL);
1169                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1170                 print_rtmsg((struct rt_msghdr *)msg, n);
1171         }
1172 }
1173
1174 struct {
1175         struct  rt_msghdr m_rtm;
1176         char    m_space[512];
1177 } m_rtmsg;
1178
1179 int
1180 rtmsg(cmd, flags)
1181         int cmd, flags;
1182 {
1183         static int seq;
1184         int rlen;
1185         char *cp = m_rtmsg.m_space;
1186         int l;
1187
1188 #define NEXTADDR(w, u) \
1189         if (rtm_addrs & (w)) {\
1190             l = SA_SIZE(&(u.sa)); memmove(cp, &(u), l); cp += l;\
1191             if (verbose) sodump(&(u),#u);\
1192         }
1193
1194         errno = 0;
1195         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1196         if (cmd == 'a')
1197                 cmd = RTM_ADD;
1198         else if (cmd == 'c')
1199                 cmd = RTM_CHANGE;
1200         else if (cmd == 'g') {
1201                 cmd = RTM_GET;
1202                 if (so_ifp.sa.sa_family == 0) {
1203                         so_ifp.sa.sa_family = AF_LINK;
1204                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1205                         rtm_addrs |= RTA_IFP;
1206                 }
1207         } else
1208                 cmd = RTM_DELETE;
1209 #define rtm m_rtmsg.m_rtm
1210         rtm.rtm_type = cmd;
1211         rtm.rtm_flags = flags;
1212         rtm.rtm_version = RTM_VERSION;
1213         rtm.rtm_seq = ++seq;
1214         rtm.rtm_addrs = rtm_addrs;
1215         rtm.rtm_rmx = rt_metrics;
1216         rtm.rtm_inits = rtm_inits;
1217
1218         if (rtm_addrs & RTA_NETMASK)
1219                 mask_addr();
1220         NEXTADDR(RTA_DST, so_dst);
1221         NEXTADDR(RTA_GATEWAY, so_gate);
1222         NEXTADDR(RTA_NETMASK, so_mask);
1223         NEXTADDR(RTA_GENMASK, so_genmask);
1224         NEXTADDR(RTA_IFP, so_ifp);
1225         NEXTADDR(RTA_IFA, so_ifa);
1226         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1227         if (verbose)
1228                 print_rtmsg(&rtm, l);
1229         if (debugonly)
1230                 return (0);
1231         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1232                 if (errno == EPERM)
1233                         err(1, "writing to routing socket");
1234                 warn("writing to routing socket");
1235                 return (-1);
1236         }
1237         if (cmd == RTM_GET) {
1238                 do {
1239                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1240                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1241                 if (l < 0)
1242                         warn("read from routing socket");
1243                 else
1244                         print_getmsg(&rtm, l);
1245         }
1246 #undef rtm
1247         return (0);
1248 }
1249
1250 void
1251 mask_addr()
1252 {
1253         int olen = so_mask.sa.sa_len;
1254         char *cp1 = olen + (char *)&so_mask, *cp2;
1255
1256         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1257                 if (*--cp1 != 0) {
1258                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1259                         break;
1260                 }
1261         if ((rtm_addrs & RTA_DST) == 0)
1262                 return;
1263         switch (so_dst.sa.sa_family) {
1264         case AF_INET:
1265 #ifdef INET6
1266         case AF_INET6:
1267 #endif
1268         case AF_APPLETALK:
1269         case 0:
1270                 return;
1271         }
1272         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1273         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1274         while (cp2 > cp1)
1275                 *--cp2 = 0;
1276         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1277         while (cp1 > so_dst.sa.sa_data)
1278                 *--cp1 &= *--cp2;
1279 }
1280
1281 char *msgtypes[] = {
1282         "",
1283         "RTM_ADD: Add Route",
1284         "RTM_DELETE: Delete Route",
1285         "RTM_CHANGE: Change Metrics or flags",
1286         "RTM_GET: Report Metrics",
1287         "RTM_LOSING: Kernel Suspects Partitioning",
1288         "RTM_REDIRECT: Told to use different route",
1289         "RTM_MISS: Lookup failed on this address",
1290         "RTM_LOCK: fix specified metrics",
1291         "RTM_OLDADD: caused by SIOCADDRT",
1292         "RTM_OLDDEL: caused by SIOCDELRT",
1293         "RTM_RESOLVE: Route created by cloning",
1294         "RTM_NEWADDR: address being added to iface",
1295         "RTM_DELADDR: address being removed from iface",
1296         "RTM_IFINFO: iface status change",
1297         "RTM_NEWMADDR: new multicast group membership on iface",
1298         "RTM_DELMADDR: multicast group membership removed from iface",
1299         "RTM_IFANNOUNCE: interface arrival/departure",
1300         0,
1301 };
1302
1303 char metricnames[] =
1304 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1305 "\1mtu";
1306 char routeflags[] =
1307 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1308 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1309 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1310 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1311 char ifnetflags[] =
1312 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1313 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1314 "\017LINK2\020MULTICAST";
1315 char addrnames[] =
1316 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1317
1318 void
1319 print_rtmsg(rtm, msglen)
1320         struct rt_msghdr *rtm;
1321         int msglen;
1322 {
1323         struct if_msghdr *ifm;
1324         struct ifa_msghdr *ifam;
1325 #ifdef RTM_NEWMADDR
1326         struct ifma_msghdr *ifmam;
1327 #endif
1328         struct if_announcemsghdr *ifan;
1329         char *state;
1330
1331         if (verbose == 0)
1332                 return;
1333         if (rtm->rtm_version != RTM_VERSION) {
1334                 (void) printf("routing message version %d not understood\n",
1335                     rtm->rtm_version);
1336                 return;
1337         }
1338         if (msgtypes[rtm->rtm_type] != NULL)
1339                 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1340         else
1341                 (void)printf("#%d: ", rtm->rtm_type);
1342         (void)printf("len %d, ", rtm->rtm_msglen);
1343         switch (rtm->rtm_type) {
1344         case RTM_IFINFO:
1345                 ifm = (struct if_msghdr *)rtm;
1346                 (void) printf("if# %d, ", ifm->ifm_index);
1347                 switch (ifm->ifm_data.ifi_link_state) {
1348                 case LINK_STATE_DOWN:
1349                         state = "down";
1350                         break;
1351                 case LINK_STATE_UP:
1352                         state = "up";
1353                         break;
1354                 default:
1355                         state = "unknown";
1356                         break;
1357                 }
1358                 (void) printf("link: %s, flags:", state);
1359                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1360                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1361                 break;
1362         case RTM_NEWADDR:
1363         case RTM_DELADDR:
1364                 ifam = (struct ifa_msghdr *)rtm;
1365                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1366                 bprintf(stdout, ifam->ifam_flags, routeflags);
1367                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1368                 break;
1369 #ifdef RTM_NEWMADDR
1370         case RTM_NEWMADDR:
1371         case RTM_DELMADDR:
1372                 ifmam = (struct ifma_msghdr *)rtm;
1373                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1374                 break;
1375 #endif
1376         case RTM_IFANNOUNCE:
1377                 ifan = (struct if_announcemsghdr *)rtm;
1378                 (void) printf("if# %d, what: ", ifan->ifan_index);
1379                 switch (ifan->ifan_what) {
1380                 case IFAN_ARRIVAL:
1381                         printf("arrival");
1382                         break;
1383                 case IFAN_DEPARTURE:
1384                         printf("departure");
1385                         break;
1386                 default:
1387                         printf("#%d", ifan->ifan_what);
1388                         break;
1389                 }
1390                 printf("\n");
1391                 break;
1392
1393         default:
1394                 (void) printf("pid: %ld, seq %d, errno %d, flags:",
1395                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1396                 bprintf(stdout, rtm->rtm_flags, routeflags);
1397                 pmsg_common(rtm);
1398         }
1399 }
1400
1401 void
1402 print_getmsg(rtm, msglen)
1403         struct rt_msghdr *rtm;
1404         int msglen;
1405 {
1406         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1407         struct sockaddr_dl *ifp = NULL;
1408         struct sockaddr *sa;
1409         char *cp;
1410         int i;
1411
1412         (void) printf("   route to: %s\n", routename(&so_dst));
1413         if (rtm->rtm_version != RTM_VERSION) {
1414                 warnx("routing message version %d not understood",
1415                      rtm->rtm_version);
1416                 return;
1417         }
1418         if (rtm->rtm_msglen > msglen) {
1419                 warnx("message length mismatch, in packet %d, returned %d",
1420                       rtm->rtm_msglen, msglen);
1421         }
1422         if (rtm->rtm_errno)  {
1423                 errno = rtm->rtm_errno;
1424                 warn("message indicates error %d", errno);
1425                 return;
1426         }
1427         cp = ((char *)(rtm + 1));
1428         if (rtm->rtm_addrs)
1429                 for (i = 1; i; i <<= 1)
1430                         if (i & rtm->rtm_addrs) {
1431                                 sa = (struct sockaddr *)cp;
1432                                 switch (i) {
1433                                 case RTA_DST:
1434                                         dst = sa;
1435                                         break;
1436                                 case RTA_GATEWAY:
1437                                         gate = sa;
1438                                         break;
1439                                 case RTA_NETMASK:
1440                                         mask = sa;
1441                                         break;
1442                                 case RTA_IFP:
1443                                         if (sa->sa_family == AF_LINK &&
1444                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1445                                                 ifp = (struct sockaddr_dl *)sa;
1446                                         break;
1447                                 }
1448                                 cp += SA_SIZE(sa);
1449                         }
1450         if (dst && mask)
1451                 mask->sa_family = dst->sa_family;       /* XXX */
1452         if (dst)
1453                 (void)printf("destination: %s\n", routename(dst));
1454         if (mask) {
1455                 int savenflag = nflag;
1456
1457                 nflag = 1;
1458                 (void)printf("       mask: %s\n", routename(mask));
1459                 nflag = savenflag;
1460         }
1461         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1462                 (void)printf("    gateway: %s\n", routename(gate));
1463         if (ifp)
1464                 (void)printf("  interface: %.*s\n",
1465                     ifp->sdl_nlen, ifp->sdl_data);
1466         (void)printf("      flags: ");
1467         bprintf(stdout, rtm->rtm_flags, routeflags);
1468
1469 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1470 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1471
1472         (void) printf("\n%s\n", "\
1473  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
1474         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1475         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1476         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1477         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1478         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1479         printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1480         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1481         if (rtm->rtm_rmx.rmx_expire)
1482                 rtm->rtm_rmx.rmx_expire -= time(0);
1483         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1484 #undef lock
1485 #undef msec
1486 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1487         if (verbose)
1488                 pmsg_common(rtm);
1489         else if (rtm->rtm_addrs &~ RTA_IGN) {
1490                 (void) printf("sockaddrs: ");
1491                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1492                 putchar('\n');
1493         }
1494 #undef  RTA_IGN
1495 }
1496
1497 void
1498 pmsg_common(rtm)
1499         struct rt_msghdr *rtm;
1500 {
1501         (void) printf("\nlocks: ");
1502         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1503         (void) printf(" inits: ");
1504         bprintf(stdout, rtm->rtm_inits, metricnames);
1505         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1506 }
1507
1508 void
1509 pmsg_addrs(cp, addrs)
1510         char    *cp;
1511         int     addrs;
1512 {
1513         struct sockaddr *sa;
1514         int i;
1515
1516         if (addrs == 0) {
1517                 (void) putchar('\n');
1518                 return;
1519         }
1520         (void) printf("\nsockaddrs: ");
1521         bprintf(stdout, addrs, addrnames);
1522         (void) putchar('\n');
1523         for (i = 1; i; i <<= 1)
1524                 if (i & addrs) {
1525                         sa = (struct sockaddr *)cp;
1526                         (void) printf(" %s", routename(sa));
1527                         cp += SA_SIZE(sa);
1528                 }
1529         (void) putchar('\n');
1530         (void) fflush(stdout);
1531 }
1532
1533 void
1534 bprintf(fp, b, s)
1535         FILE *fp;
1536         int b;
1537         u_char *s;
1538 {
1539         int i;
1540         int gotsome = 0;
1541
1542         if (b == 0)
1543                 return;
1544         while ((i = *s++) != 0) {
1545                 if (b & (1 << (i-1))) {
1546                         if (gotsome == 0)
1547                                 i = '<';
1548                         else
1549                                 i = ',';
1550                         (void) putc(i, fp);
1551                         gotsome = 1;
1552                         for (; (i = *s) > 32; s++)
1553                                 (void) putc(i, fp);
1554                 } else
1555                         while (*s > 32)
1556                                 s++;
1557         }
1558         if (gotsome)
1559                 (void) putc('>', fp);
1560 }
1561
1562 int
1563 keyword(cp)
1564         char *cp;
1565 {
1566         struct keytab *kt = keywords;
1567
1568         while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1569                 kt++;
1570         return kt->kt_i;
1571 }
1572
1573 void
1574 sodump(su, which)
1575         sup su;
1576         char *which;
1577 {
1578         switch (su->sa.sa_family) {
1579         case AF_LINK:
1580                 (void) printf("%s: link %s; ",
1581                     which, link_ntoa(&su->sdl));
1582                 break;
1583         case AF_INET:
1584                 (void) printf("%s: inet %s; ",
1585                     which, inet_ntoa(su->sin.sin_addr));
1586                 break;
1587         case AF_APPLETALK:
1588                 (void) printf("%s: atalk %s; ",
1589                     which, atalk_ntoa(su->sat.sat_addr));
1590                 break;
1591         }
1592         (void) fflush(stdout);
1593 }
1594
1595 /* States*/
1596 #define VIRGIN  0
1597 #define GOTONE  1
1598 #define GOTTWO  2
1599 /* Inputs */
1600 #define DIGIT   (4*0)
1601 #define END     (4*1)
1602 #define DELIM   (4*2)
1603
1604 void
1605 sockaddr(addr, sa)
1606         char *addr;
1607         struct sockaddr *sa;
1608 {
1609         char *cp = (char *)sa;
1610         int size = sa->sa_len;
1611         char *cplim = cp + size;
1612         int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1613
1614         memset(cp, 0, size);
1615         cp++;
1616         do {
1617                 if ((*addr >= '0') && (*addr <= '9')) {
1618                         new = *addr - '0';
1619                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1620                         new = *addr - 'a' + 10;
1621                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1622                         new = *addr - 'A' + 10;
1623                 } else if (*addr == 0)
1624                         state |= END;
1625                 else
1626                         state |= DELIM;
1627                 addr++;
1628                 switch (state /* | INPUT */) {
1629                 case GOTTWO | DIGIT:
1630                         *cp++ = byte; /*FALLTHROUGH*/
1631                 case VIRGIN | DIGIT:
1632                         state = GOTONE; byte = new; continue;
1633                 case GOTONE | DIGIT:
1634                         state = GOTTWO; byte = new + (byte << 4); continue;
1635                 default: /* | DELIM */
1636                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1637                 case GOTONE | END:
1638                 case GOTTWO | END:
1639                         *cp++ = byte; /* FALLTHROUGH */
1640                 case VIRGIN | END:
1641                         break;
1642                 }
1643                 break;
1644         } while (cp < cplim);
1645         sa->sa_len = cp - (char *)sa;
1646 }
1647
1648 int
1649 atalk_aton(const char *text, struct at_addr *addr)
1650 {
1651         u_int net, node;
1652
1653         if (sscanf(text, "%u.%u", &net, &node) != 2
1654             || net > 0xffff || node > 0xff)
1655                 return(0);
1656         addr->s_net = htons(net);
1657         addr->s_node = node;
1658         return(1);
1659 }
1660
1661 char *
1662 atalk_ntoa(struct at_addr at)
1663 {
1664         static char buf[20];
1665
1666         (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1667         return(buf);
1668 }