sbin/route/route.c

   1 /*
   2  * Copyright (c) 1983, 1989, 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1983, 1989, 1991, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)route.c  8.6 (Berkeley) 4/28/95
  35  * $FreeBSD: src/sbin/route/route.c,v 1.40.2.11 2003/02/27 23:10:10 ru Exp $
  36  * $DragonFly: src/sbin/route/route.c,v 1.3 2003/09/28 14:39:22 hmp Exp $
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/file.h>
  41 #include <sys/socket.h>
  42 #include <sys/ioctl.h>
  43 #include <sys/sysctl.h>
  44 #include <sys/types.h>
  45
  46 #include <net/if.h>
  47 #include <net/route.h>
  48 #include <net/if_dl.h>
  49 #include <netinet/in.h>
  50 #include <netinet/if_ether.h>
  51 #include <netatalk/at.h>
  52 #ifdef NS
  53 #include <netns/ns.h>
  54 #endif
  55 #include <arpa/inet.h>
  56 #include <netdb.h>
  57
  58 #include <ctype.h>
  59 #include <err.h>
  60 #include <errno.h>
  61 #include <paths.h>
  62 #include <stdio.h>
  63 #include <stdlib.h>
  64 #include <string.h>
  65 #include <sysexits.h>
  66 #include <unistd.h>
  67 #include <ifaddrs.h>
  68
  69 struct keytab {
  70         char    *kt_cp;
  71         int     kt_i;
  72 } keywords[] = {
  73 #include "keywords.h"
  74         {0, 0}
  75 };
  76
  77 struct  ortentry route;
  78 union   sockunion {
  79         struct  sockaddr sa;
  80         struct  sockaddr_in sin;
  81 #ifdef INET6
  82         struct  sockaddr_in6 sin6;
  83 #endif
  84         struct  sockaddr_at sat;
  85 #ifdef NS
  86         struct  sockaddr_ns sns;
  87 #endif
  88         struct  sockaddr_dl sdl;
  89         struct  sockaddr_inarp sinarp;
  90         struct  sockaddr_storage ss; /* added to avoid memory overrun */
  91 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
  92
  93 typedef union sockunion *sup;
  94 int     pid, rtm_addrs;
  95 int     s;
  96 int     forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword();
  97 int     iflag, verbose, aflen = sizeof (struct sockaddr_in);
  98 int     locking, lockrest, debugonly;
  99 struct  rt_metrics rt_metrics;
 100 u_long  rtm_inits;
 101 uid_t   uid;
 102 int     atalk_aton __P((const char *, struct at_addr *));
 103 char    *atalk_ntoa __P((struct at_addr));
 104 const char      *routename(), *netname();
 105 void    flushroutes(), newroute(), monitor(), sockaddr(), sodump(), bprintf();
 106 void    print_getmsg(), print_rtmsg(), pmsg_common(), pmsg_addrs(), mask_addr();
 107 #ifdef INET6
 108 static int inet6_makenetandmask __P((struct sockaddr_in6 *, char *));
 109 #endif
 110 int     getaddr(), rtmsg(), x25_makemask();
 111 int     prefixlen();
 112 extern  char *iso_ntoa();
 113
 114 void usage __P((const char *)) __dead2;
 115
 116 void
 117 usage(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 #define ROUNDUP(a) \
 128         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 129 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 130
 131 int
 132 main(int argc, char **argv)
 133 {
 134         int ch;
 135
 136         if (argc < 2)
 137                 usage((char *)NULL);
 138
 139         while ((ch = getopt(argc, argv, "nqdtv")) != -1)
 140                 switch(ch) {
 141                 case 'n':
 142                         nflag = 1;
 143                         break;
 144                 case 'q':
 145                         qflag = 1;
 146                         break;
 147                 case 'v':
 148                         verbose = 1;
 149                         break;
 150                 case 't':
 151                         tflag = 1;
 152                         break;
 153                 case 'd':
 154                         debugonly = 1;
 155                         break;
 156                 case '?':
 157                 default:
 158                         usage((char *)NULL);
 159                 }
 160         argc -= optind;
 161         argv += optind;
 162
 163         pid = getpid();
 164         uid = geteuid();
 165         if (tflag)
 166                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 167         else
 168                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 169         if (s < 0)
 170                 err(EX_OSERR, "socket");
 171         if (*argv)
 172                 switch (keyword(*argv)) {
 173                 case K_GET:
 174                         uid = 0;
 175                         /* FALLTHROUGH */
 176
 177                 case K_CHANGE:
 178                 case K_ADD:
 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(int argc, char **argv)
 202 {
 203         size_t needed;
 204         int mib[6], rlen, seqno;
 205         char *buf, *next, *lim;
 206         register struct rt_msghdr *rtm;
 207
 208         if (uid) {
 209                 errx(EX_NOPERM, "must be root to alter routing table");
 210         }
 211         shutdown(s, 0); /* Don't want to read back our messages */
 212         if (argc > 1) {
 213                 argv++;
 214                 if (argc == 2 && **argv == '-')
 215                     switch (keyword(*argv + 1)) {
 216                         case K_INET:
 217                                 af = AF_INET;
 218                                 break;
 219 #ifdef INET6
 220                         case K_INET6:
 221                                 af = AF_INET6;
 222                                 break;
 223 #endif
 224                         case K_ATALK:
 225                                 af = AF_APPLETALK;
 226                                 break;
 227 #ifdef NS
 228                         case K_XNS:
 229                                 af = AF_NS;
 230                                 break;
 231 #endif
 232                         case K_LINK:
 233                                 af = AF_LINK;
 234                                 break;
 235                         default:
 236                                 goto bad;
 237                 } else
 238 bad:                    usage(*argv);
 239         }
 240         mib[0] = CTL_NET;
 241         mib[1] = PF_ROUTE;
 242         mib[2] = 0;             /* protocol */
 243         mib[3] = 0;             /* wildcard address family */
 244         mib[4] = NET_RT_DUMP;
 245         mib[5] = 0;             /* no flags */
 246         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 247                 err(EX_OSERR, "route-sysctl-estimate");
 248         if ((buf = malloc(needed)) == NULL)
 249                 errx(EX_OSERR, "malloc failed");
 250         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 251                 err(EX_OSERR, "route-sysctl-get");
 252         lim = buf + needed;
 253         if (verbose)
 254                 (void) printf("Examining routing table from sysctl\n");
 255         seqno = 0;              /* ??? */
 256         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 257                 rtm = (struct rt_msghdr *)next;
 258                 if (verbose)
 259                         print_rtmsg(rtm, rtm->rtm_msglen);
 260                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 261                         continue;
 262                 if (af) {
 263                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 264
 265                         if (sa->sa_family != af)
 266                                 continue;
 267                 }
 268                 if (debugonly)
 269                         continue;
 270                 rtm->rtm_type = RTM_DELETE;
 271                 rtm->rtm_seq = seqno;
 272                 rlen = write(s, next, rtm->rtm_msglen);
 273                 if (rlen < (int)rtm->rtm_msglen) {
 274                         warn("write to routing socket");
 275                         (void) printf("got only %d for rlen\n", rlen);
 276                         break;
 277                 }
 278                 seqno++;
 279                 if (qflag)
 280                         continue;
 281                 if (verbose)
 282                         print_rtmsg(rtm, rlen);
 283                 else {
 284                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 285                         (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 286                             routename(sa) : netname(sa));
 287                         sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
 288                         (void) printf("%-20.20s ", routename(sa));
 289                         (void) printf("done\n");
 290                 }
 291         }
 292 }
 293
 294 const char *
 295 routename(struct sockaddr *sa)
 296 {
 297         register char *cp;
 298         static char line[MAXHOSTNAMELEN + 1];
 299         struct hostent *hp;
 300         static char domain[MAXHOSTNAMELEN + 1];
 301         static int first = 1;
 302 #ifdef NS
 303         char *ns_print();
 304 #endif
 305
 306         if (first) {
 307                 first = 0;
 308                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 309                     (cp = strchr(domain, '.'))) {
 310                         domain[MAXHOSTNAMELEN] = '\0';
 311                         (void) strcpy(domain, cp + 1);
 312                 } else
 313                         domain[0] = 0;
 314         }
 315
 316         if (sa->sa_len == 0)
 317                 strcpy(line, "default");
 318         else switch (sa->sa_family) {
 319
 320         case AF_INET:
 321             {   struct in_addr in;
 322                 in = ((struct sockaddr_in *)sa)->sin_addr;
 323
 324                 cp = 0;
 325                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 326                         cp = "default";
 327                 if (cp == 0 && !nflag) {
 328                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 329                                 AF_INET);
 330                         if (hp) {
 331                                 if ((cp = strchr(hp->h_name, '.')) &&
 332                                     !strcmp(cp + 1, domain))
 333                                         *cp = 0;
 334                                 cp = hp->h_name;
 335                         }
 336                 }
 337                 if (cp) {
 338                         strncpy(line, cp, sizeof(line) - 1);
 339                         line[sizeof(line) - 1] = '\0';
 340                 } else
 341                         (void) sprintf(line, "%s", inet_ntoa(in));
 342                 break;
 343             }
 344
 345 #ifdef INET6
 346         case AF_INET6:
 347         {
 348                 struct sockaddr_in6 sin6; /* use static var for safety */
 349                 int niflags = 0;
 350 #ifdef NI_WITHSCOPEID
 351                 niflags = NI_WITHSCOPEID;
 352 #endif
 353
 354                 memset(&sin6, 0, sizeof(sin6));
 355                 memcpy(&sin6, sa, sa->sa_len);
 356                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 357                 sin6.sin6_family = AF_INET6;
 358 #ifdef __KAME__
 359                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 360                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 361                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 362                     sin6.sin6_scope_id == 0) {
 363                         sin6.sin6_scope_id =
 364                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 365                         sin6.sin6_addr.s6_addr[2] = 0;
 366                         sin6.sin6_addr.s6_addr[3] = 0;
 367                 }
 368 #endif
 369                 if (nflag)
 370                         niflags |= NI_NUMERICHOST;
 371                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 372                     line, sizeof(line), NULL, 0, niflags) != 0)
 373                         strncpy(line, "invalid", sizeof(line));
 374
 375                 return(line);
 376         }
 377 #endif
 378
 379         case AF_APPLETALK:
 380                 (void) snprintf(line, sizeof(line), "atalk %s",
 381                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 382                 break;
 383
 384 #ifdef NS
 385         case AF_NS:
 386                 return (ns_print((struct sockaddr_ns *)sa));
 387 #endif
 388
 389         case AF_LINK:
 390                 return (link_ntoa((struct sockaddr_dl *)sa));
 391
 392         default:
 393             {   u_short *s = (u_short *)sa;
 394                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 395                 char *cp = line + sprintf(line, "(%d)", sa->sa_family);
 396                 char *cpe = line + sizeof(line);
 397
 398                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 399                         cp += snprintf(cp, cpe - cp, " %x", *s);
 400                 break;
 401             }
 402         }
 403         return (line);
 404 }
 405
 406 /*
 407  * Return the name of the network whose address is given.
 408  * The address is assumed to be that of a net or subnet, not a host.
 409  */
 410 const char *
 411 netname(struct sockaddr *sa)
 412 {
 413         char *cp = 0;
 414         static char line[MAXHOSTNAMELEN + 1];
 415         struct netent *np = 0;
 416         u_long net, mask;
 417         register u_long i;
 418         int subnetshift;
 419 #ifdef NS
 420         char *ns_print();
 421 #endif
 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 #ifdef NI_WITHSCOPEID
 483                 niflags = NI_WITHSCOPEID;
 484 #endif
 485
 486                 memset(&sin6, 0, sizeof(sin6));
 487                 memcpy(&sin6, sa, sa->sa_len);
 488                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 489                 sin6.sin6_family = AF_INET6;
 490 #ifdef __KAME__
 491                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 492                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 493                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 494                     sin6.sin6_scope_id == 0) {
 495                         sin6.sin6_scope_id =
 496                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 497                         sin6.sin6_addr.s6_addr[2] = 0;
 498                         sin6.sin6_addr.s6_addr[3] = 0;
 499                 }
 500 #endif
 501                 if (nflag)
 502                         niflags |= NI_NUMERICHOST;
 503                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 504                     line, sizeof(line), NULL, 0, niflags) != 0)
 505                         strncpy(line, "invalid", sizeof(line));
 506
 507                 return(line);
 508         }
 509 #endif
 510
 511         case AF_APPLETALK:
 512                 (void) snprintf(line, sizeof(line), "atalk %s",
 513                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 514                 break;
 515
 516 #ifdef NS
 517         case AF_NS:
 518                 return (ns_print((struct sockaddr_ns *)sa));
 519                 break;
 520 #endif
 521
 522         case AF_LINK:
 523                 return (link_ntoa((struct sockaddr_dl *)sa));
 524
 525
 526         default:
 527             {   u_short *s = (u_short *)sa->sa_data;
 528                 u_short *slim = s + ((sa->sa_len + 1)>>1);
 529                 char *cp = line + sprintf(line, "af %d:", sa->sa_family);
 530                 char *cpe = line + sizeof(line);
 531
 532                 while (s < slim && cp < cpe)
 533                         cp += snprintf(cp, cpe - cp, " %x", *s++);
 534                 break;
 535             }
 536         }
 537         return (line);
 538 }
 539
 540 void
 541 set_metric(char *value, int key)
 542 {
 543         int flag = 0;
 544         u_long noval, *valp = &noval;
 545
 546         switch (key) {
 547 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 548         caseof(K_MTU, RTV_MTU, rmx_mtu);
 549         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 550         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 551         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 552         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 553         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 554         caseof(K_RTT, RTV_RTT, rmx_rtt);
 555         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 556         }
 557         rtm_inits |= flag;
 558         if (lockrest || locking)
 559                 rt_metrics.rmx_locks |= flag;
 560         if (locking)
 561                 locking = 0;
 562         *valp = atoi(value);
 563 }
 564
 565 void
 566 newroute(int argc, char **argv)
 567 {
 568         char *cmd, *dest = "", *gateway = "", *err;
 569         int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 570         int key;
 571         struct hostent *hp = 0;
 572
 573         if (uid) {
 574                 errx(EX_NOPERM, "must be root to alter routing table");
 575         }
 576         cmd = argv[0];
 577         if (*cmd != 'g')
 578                 shutdown(s, 0); /* Don't want to read back our messages */
 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 #ifdef NS
 605                         case K_XNS:
 606                                 af = AF_NS;
 607                                 aflen = sizeof(struct sockaddr_ns);
 608                                 break;
 609 #endif
 610                         case K_IFACE:
 611                         case K_INTERFACE:
 612                                 iflag++;
 613                                 break;
 614                         case K_NOSTATIC:
 615                                 flags &= ~RTF_STATIC;
 616                                 break;
 617                         case K_LLINFO:
 618                                 flags |= RTF_LLINFO;
 619                                 break;
 620                         case K_LOCK:
 621                                 locking = 1;
 622                                 break;
 623                         case K_LOCKREST:
 624                                 lockrest = 1;
 625                                 break;
 626                         case K_HOST:
 627                                 forcehost++;
 628                                 break;
 629                         case K_REJECT:
 630                                 flags |= RTF_REJECT;
 631                                 break;
 632                         case K_BLACKHOLE:
 633                                 flags |= RTF_BLACKHOLE;
 634                                 break;
 635                         case K_PROTO1:
 636                                 flags |= RTF_PROTO1;
 637                                 break;
 638                         case K_PROTO2:
 639                                 flags |= RTF_PROTO2;
 640                                 break;
 641                         case K_PROXY:
 642                                 proxy = 1;
 643                                 break;
 644                         case K_CLONING:
 645                                 flags |= RTF_CLONING;
 646                                 break;
 647                         case K_XRESOLVE:
 648                                 flags |= RTF_XRESOLVE;
 649                                 break;
 650                         case K_STATIC:
 651                                 flags |= RTF_STATIC;
 652                                 break;
 653                         case K_IFA:
 654                                 if (!--argc)
 655                                         usage((char *)NULL);
 656                                 (void) getaddr(RTA_IFA, *++argv, 0);
 657                                 break;
 658                         case K_IFP:
 659                                 if (!--argc)
 660                                         usage((char *)NULL);
 661                                 (void) getaddr(RTA_IFP, *++argv, 0);
 662                                 break;
 663                         case K_GENMASK:
 664                                 if (!--argc)
 665                                         usage((char *)NULL);
 666                                 (void) getaddr(RTA_GENMASK, *++argv, 0);
 667                                 break;
 668                         case K_GATEWAY:
 669                                 if (!--argc)
 670                                         usage((char *)NULL);
 671                                 (void) getaddr(RTA_GATEWAY, *++argv, 0);
 672                                 break;
 673                         case K_DST:
 674                                 if (!--argc)
 675                                         usage((char *)NULL);
 676                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 677                                 dest = *argv;
 678                                 break;
 679                         case K_NETMASK:
 680                                 if (!--argc)
 681                                         usage((char *)NULL);
 682                                 (void) getaddr(RTA_NETMASK, *++argv, 0);
 683                                 /* FALLTHROUGH */
 684                         case K_NET:
 685                                 forcenet++;
 686                                 break;
 687                         case K_PREFIXLEN:
 688                                 if (!--argc)
 689                                         usage((char *)NULL);
 690                                 if (prefixlen(*++argv) == -1) {
 691                                         forcenet = 0;
 692                                         ishost = 1;
 693                                 } else {
 694                                         forcenet = 1;
 695                                         ishost = 0;
 696                                 }
 697                                 break;
 698                         case K_MTU:
 699                         case K_HOPCOUNT:
 700                         case K_EXPIRE:
 701                         case K_RECVPIPE:
 702                         case K_SENDPIPE:
 703                         case K_SSTHRESH:
 704                         case K_RTT:
 705                         case K_RTTVAR:
 706                                 if (!--argc)
 707                                         usage((char *)NULL);
 708                                 set_metric(*++argv, key);
 709                                 break;
 710                         default:
 711                                 usage(1+*argv);
 712                         }
 713                 } else {
 714                         if ((rtm_addrs & RTA_DST) == 0) {
 715                                 dest = *argv;
 716                                 ishost = getaddr(RTA_DST, *argv, &hp);
 717                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 718                                 gateway = *argv;
 719                                 (void) getaddr(RTA_GATEWAY, *argv, &hp);
 720                         } else {
 721                                 (void) getaddr(RTA_NETMASK, *argv, 0);
 722                                 forcenet = 1;
 723                         }
 724                 }
 725         }
 726         if (forcehost) {
 727                 ishost = 1;
 728 #ifdef INET6
 729                 if (af == AF_INET6) {
 730                         rtm_addrs &= ~RTA_NETMASK;
 731                         memset((void *)&so_mask, 0, sizeof(so_mask));
 732                 }
 733 #endif
 734         }
 735         if (forcenet)
 736                 ishost = 0;
 737         flags |= RTF_UP;
 738         if (ishost)
 739                 flags |= RTF_HOST;
 740         if (iflag == 0)
 741                 flags |= RTF_GATEWAY;
 742         if (proxy) {
 743                 so_dst.sinarp.sin_other = SIN_PROXY;
 744                 flags |= RTF_ANNOUNCE;
 745         }
 746         for (attempts = 1; ; attempts++) {
 747                 errno = 0;
 748                 if ((ret = rtmsg(*cmd, flags)) == 0)
 749                         break;
 750                 if (errno != ENETUNREACH && errno != ESRCH)
 751                         break;
 752                 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 753                         hp->h_addr_list++;
 754                         memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0],
 755                             MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
 756                 } else
 757                         break;
 758         }
 759         if (*cmd == 'g')
 760                 exit(0);
 761         if (!qflag) {
 762                 oerrno = errno;
 763                 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 764                 if (*gateway) {
 765                         (void) printf(": gateway %s", gateway);
 766                         if (attempts > 1 && ret == 0 && af == AF_INET)
 767                             (void) printf(" (%s)",
 768                                 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
 769                 }
 770                 if (ret == 0) {
 771                         (void) printf("\n");
 772                 } else {
 773                         switch (oerrno) {
 774                         case ESRCH:
 775                                 err = "not in table";
 776                                 break;
 777                         case EBUSY:
 778                                 err = "entry in use";
 779                                 break;
 780                         case ENOBUFS:
 781                                 err = "routing table overflow";
 782                                 break;
 783                         case EDQUOT: /* handle recursion avoidance in rt_setgate() */
 784                                 err = "gateway uses the same route";
 785                                 break;
 786                         default:
 787                                 err = strerror(oerrno);
 788                                 break;
 789                         }
 790                         (void) printf(": %s\n", err);
 791                 }
 792         }
 793         exit(ret != 0);
 794 }
 795
 796 void
 797 inet_makenetandmask(u_long net, register struct sockaddr_in *sin, u_long bits)
 798 {
 799         u_long addr, mask = 0;
 800         register char *cp;
 801
 802         rtm_addrs |= RTA_NETMASK;
 803         if (net == 0)
 804                 mask = addr = 0;
 805         else if (net < 128) {
 806                 addr = net << IN_CLASSA_NSHIFT;
 807                 mask = IN_CLASSA_NET;
 808         } else if (net < 65536) {
 809                 addr = net << IN_CLASSB_NSHIFT;
 810                 mask = IN_CLASSB_NET;
 811         } else if (net < 16777216L) {
 812                 addr = net << IN_CLASSC_NSHIFT;
 813                 mask = IN_CLASSC_NET;
 814         } else {
 815                 addr = net;
 816                 if ((addr & IN_CLASSA_HOST) == 0)
 817                         mask =  IN_CLASSA_NET;
 818                 else if ((addr & IN_CLASSB_HOST) == 0)
 819                         mask =  IN_CLASSB_NET;
 820                 else if ((addr & IN_CLASSC_HOST) == 0)
 821                         mask =  IN_CLASSC_NET;
 822                 else
 823                         mask = -1;
 824         }
 825         if (bits)
 826                 mask = 0xffffffff << (32 - bits);
 827         sin->sin_addr.s_addr = htonl(addr);
 828         sin = &so_mask.sin;
 829         sin->sin_addr.s_addr = htonl(mask);
 830         sin->sin_len = 0;
 831         sin->sin_family = 0;
 832         cp = (char *)(&sin->sin_addr + 1);
 833         while (*--cp == 0 && cp > (char *)sin)
 834                 ;
 835         sin->sin_len = 1 + cp - (char *)sin;
 836 }
 837
 838 #ifdef INET6
 839 /*
 840  * XXX the function may need more improvement...
 841  */
 842 static int
 843 inet6_makenetandmask(struct sockaddr_in6 *sin6, char *plen)
 844 {
 845         struct in6_addr in6;
 846
 847         if (!plen) {
 848                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 849                     sin6->sin6_scope_id == 0) {
 850                         plen = "0";
 851                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 852                         /* aggregatable global unicast - RFC2374 */
 853                         memset(&in6, 0, sizeof(in6));
 854                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
 855                                     &in6.s6_addr[8], 8))
 856                                 plen = "64";
 857                 }
 858         }
 859
 860         if (!plen || strcmp(plen, "128") == 0)
 861                 return 1;
 862         rtm_addrs |= RTA_NETMASK;
 863         (void)prefixlen(plen);
 864         return 0;
 865 }
 866 #endif
 867
 868 /*
 869  * Interpret an argument as a network address of some kind,
 870  * returning 1 if a host address, 0 if a network address.
 871  */
 872 int
 873 getaddr(int which, char *s, struct hostent **hpp)
 874 {
 875         register sup su;
 876         struct hostent *hp;
 877         struct netent *np;
 878         u_long val;
 879         char *q;
 880         int afamily;  /* local copy of af so we can change it */
 881
 882         if (af == 0) {
 883                 af = AF_INET;
 884                 aflen = sizeof(struct sockaddr_in);
 885         }
 886         afamily = af;
 887         rtm_addrs |= which;
 888         switch (which) {
 889         case RTA_DST:
 890                 su = &so_dst;
 891                 break;
 892         case RTA_GATEWAY:
 893                 su = &so_gate;
 894                 if (iflag) {
 895                         struct ifaddrs *ifap, *ifa;
 896                         struct sockaddr_dl *sdl = NULL;
 897
 898                         if (getifaddrs(&ifap))
 899                                 err(1, "getifaddrs");
 900
 901                         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 902                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 903                                         continue;
 904
 905                                 if (strcmp(s, ifa->ifa_name))
 906                                         continue;
 907
 908                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 909                         }
 910                         /* If we found it, then use it */
 911                         if (sdl) {
 912                                 /*
 913                                  * Copy is safe since we have a
 914                                  * sockaddr_storage member in sockunion{}.
 915                                  * Note that we need to copy before calling
 916                                  * freeifaddrs().
 917                                  */
 918                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 919                         }
 920                         freeifaddrs(ifap);
 921                         if (sdl)
 922                                 return(1);
 923                 }
 924                 break;
 925         case RTA_NETMASK:
 926                 su = &so_mask;
 927                 break;
 928         case RTA_GENMASK:
 929                 su = &so_genmask;
 930                 break;
 931         case RTA_IFP:
 932                 su = &so_ifp;
 933                 afamily = AF_LINK;
 934                 break;
 935         case RTA_IFA:
 936                 su = &so_ifa;
 937                 break;
 938         default:
 939                 usage("internal error");
 940                 /*NOTREACHED*/
 941         }
 942         su->sa.sa_len = aflen;
 943         su->sa.sa_family = afamily; /* cases that don't want it have left already */
 944         if (strcmp(s, "default") == 0) {
 945                 /*
 946                  * Default is net 0.0.0.0/0
 947                  */
 948                 switch (which) {
 949                 case RTA_DST:
 950                         forcenet++;
 951                         /* bzero(su, sizeof(*su)); *//* for readability */
 952                         (void) getaddr(RTA_NETMASK, s, 0);
 953                         break;
 954                 case RTA_NETMASK:
 955                 case RTA_GENMASK:
 956                         /* bzero(su, sizeof(*su)); *//* for readability */
 957                 }
 958                 return (0);
 959         }
 960         switch (afamily) {
 961 #ifdef INET6
 962         case AF_INET6:
 963         {
 964                 struct addrinfo hints, *res;
 965
 966                 q = NULL;
 967                 if (which == RTA_DST && (q = strchr(s, '/')) != NULL)
 968                         *q = '\0';
 969                 memset(&hints, 0, sizeof(hints));
 970                 hints.ai_family = afamily;      /*AF_INET6*/
 971                 hints.ai_flags = AI_NUMERICHOST;
 972                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
 973                 if (getaddrinfo(s, "0", &hints, &res) != 0 ||
 974                     res->ai_family != AF_INET6 ||
 975                     res->ai_addrlen != sizeof(su->sin6)) {
 976                         (void) fprintf(stderr, "%s: bad value\n", s);
 977                         exit(1);
 978                 }
 979                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
 980 #ifdef __KAME__
 981                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
 982                      IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) &&
 983                     su->sin6.sin6_scope_id) {
 984                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
 985                                 htons(su->sin6.sin6_scope_id);
 986                         su->sin6.sin6_scope_id = 0;
 987                 }
 988 #endif
 989                 freeaddrinfo(res);
 990                 if (q != NULL)
 991                         *q++ = '/';
 992                 if (which == RTA_DST)
 993                         return (inet6_makenetandmask(&su->sin6, q));
 994                 return (0);
 995         }
 996 #endif /* INET6 */
 997
 998 #ifdef NS
 999         case AF_NS:
1000                 if (which == RTA_DST) {
1001                         extern short ns_bh[3];
1002                         struct sockaddr_ns *sms = &(so_mask.sns);
1003                         memset(sms, 0, sizeof(*sms));
1004                         sms->sns_family = 0;
1005                         sms->sns_len = 6;
1006                         sms->sns_addr.x_net = *(union ns_net *)ns_bh;
1007                         rtm_addrs |= RTA_NETMASK;
1008                 }
1009                 su->sns.sns_addr = ns_addr(s);
1010                 return (!ns_nullhost(su->sns.sns_addr));
1011 #endif
1012
1013
1014         case AF_APPLETALK:
1015                 if (!atalk_aton(s, &su->sat.sat_addr))
1016                         errx(EX_NOHOST, "bad address: %s", s);
1017                 rtm_addrs |= RTA_NETMASK;
1018                 return(forcehost || su->sat.sat_addr.s_node != 0);
1019
1020         case AF_LINK:
1021                 link_addr(s, &su->sdl);
1022                 return (1);
1023
1024
1025         case PF_ROUTE:
1026                 su->sa.sa_len = sizeof(*su);
1027                 sockaddr(s, &su->sa);
1028                 return (1);
1029
1030         case AF_INET:
1031         default:
1032                 break;
1033         }
1034
1035         if (hpp == NULL)
1036                 hpp = &hp;
1037         *hpp = NULL;
1038
1039         q = strchr(s,'/');
1040         if (q && which == RTA_DST) {
1041                 *q = '\0';
1042                 if ((val = inet_network(s)) != INADDR_NONE) {
1043                         inet_makenetandmask(
1044                                 val, &su->sin, strtoul(q+1, 0, 0));
1045                         return (0);
1046                 }
1047                 *q = '/';
1048         }
1049         if ((which != RTA_DST || forcenet == 0) &&
1050             inet_aton(s, &su->sin.sin_addr)) {
1051                 val = su->sin.sin_addr.s_addr;
1052                 if (which != RTA_DST ||
1053                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1054                         return (1);
1055                 else {
1056                         val = ntohl(val);
1057                         goto netdone;
1058                 }
1059         }
1060         if (which == RTA_DST && forcehost == 0 &&
1061             ((val = inet_network(s)) != INADDR_NONE ||
1062             ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
1063 netdone:
1064                 inet_makenetandmask(val, &su->sin, 0);
1065                 return (0);
1066         }
1067         hp = gethostbyname(s);
1068         if (hp) {
1069                 *hpp = hp;
1070                 su->sin.sin_family = hp->h_addrtype;
1071                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1072                     MIN(hp->h_length, sizeof(su->sin.sin_addr)));
1073                 return (1);
1074         }
1075         errx(EX_NOHOST, "bad address: %s", s);
1076 }
1077
1078 int
1079 prefixlen(char *s)
1080 {
1081         int len = atoi(s), q, r;
1082         int max;
1083         char *p;
1084
1085         rtm_addrs |= RTA_NETMASK;
1086         switch (af) {
1087 #ifdef INET6
1088         case AF_INET6:
1089                 max = 128;
1090                 p = (char *)&so_mask.sin6.sin6_addr;
1091                 break;
1092 #endif
1093         case AF_INET:
1094                 max = 32;
1095                 p = (char *)&so_mask.sin.sin_addr;
1096                 break;
1097         default:
1098                 (void) fprintf(stderr, "prefixlen not supported in this af\n");
1099                 exit(1);
1100                 /*NOTREACHED*/
1101         }
1102
1103         if (len < 0 || max < len) {
1104                 (void) fprintf(stderr, "%s: bad value\n", s);
1105                 exit(1);
1106         }
1107
1108         q = len >> 3;
1109         r = len & 7;
1110         so_mask.sa.sa_family = af;
1111         so_mask.sa.sa_len = aflen;
1112         memset((void *)p, 0, max / 8);
1113         if (q > 0)
1114                 memset((void *)p, 0xff, q);
1115         if (r > 0)
1116                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1117         if (len == max)
1118                 return -1;
1119         else
1120                 return len;
1121 }
1122
1123 #ifdef NS
1124 short ns_nullh[] = {0,0,0};
1125 short ns_bh[] = {-1,-1,-1};
1126
1127 char *
1128 ns_print(struct sockaddr_ns *sns)
1129 {
1130         struct ns_addr work;
1131         union { union ns_net net_e; u_long long_e; } net;
1132         u_short port;
1133         static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25];
1134         char *host = "";
1135         register char *p;
1136         register u_char *q;
1137
1138         work = sns->sns_addr;
1139         port = ntohs(work.x_port);
1140         work.x_port = 0;
1141         net.net_e  = work.x_net;
1142         if (ns_nullhost(work) && net.long_e == 0) {
1143                 if (!port)
1144                         return ("*.*");
1145                 (void) sprintf(mybuf, "*.%XH", port);
1146                 return (mybuf);
1147         }
1148
1149         if (memcmp(ns_bh, work.x_host.c_host, 6) == 0)
1150                 host = "any";
1151         else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0)
1152                 host = "*";
1153         else {
1154                 q = work.x_host.c_host;
1155                 (void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH",
1156                         q[0], q[1], q[2], q[3], q[4], q[5]);
1157                 for (p = chost; *p == '0' && p < chost + 12; p++)
1158                         /* void */;
1159                 host = p;
1160         }
1161         if (port)
1162                 (void) sprintf(cport, ".%XH", htons(port));
1163         else
1164                 *cport = 0;
1165
1166         (void) snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s",
1167                         (unsigned long)ntohl(net.long_e),
1168                         host, cport);
1169         return (mybuf);
1170 }
1171 #endif
1172
1173 void
1174 interfaces(void)
1175 {
1176         size_t needed;
1177         int mib[6];
1178         char *buf, *lim, *next;
1179         register struct rt_msghdr *rtm;
1180
1181         mib[0] = CTL_NET;
1182         mib[1] = PF_ROUTE;
1183         mib[2] = 0;             /* protocol */
1184         mib[3] = 0;             /* wildcard address family */
1185         mib[4] = NET_RT_IFLIST;
1186         mib[5] = 0;             /* no flags */
1187         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1188                 err(EX_OSERR, "route-sysctl-estimate");
1189         if ((buf = malloc(needed)) == NULL)
1190                 errx(EX_OSERR, "malloc failed");
1191         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1192                 err(EX_OSERR, "actual retrieval of interface table");
1193         lim = buf + needed;
1194         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1195                 rtm = (struct rt_msghdr *)next;
1196                 print_rtmsg(rtm, rtm->rtm_msglen);
1197         }
1198 }
1199
1200 void
1201 monitor(void)
1202 {
1203         int n;
1204         char msg[2048];
1205
1206         verbose = 1;
1207         if (debugonly) {
1208                 interfaces();
1209                 exit(0);
1210         }
1211         for(;;) {
1212                 time_t now;
1213                 n = read(s, msg, 2048);
1214                 now = time(NULL);
1215                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1216                 print_rtmsg((struct rt_msghdr *)msg, n);
1217         }
1218 }
1219
1220 struct {
1221         struct  rt_msghdr m_rtm;
1222         char    m_space[512];
1223 } m_rtmsg;
1224
1225 int
1226 rtmsg(int cmd, int flags)
1227 {
1228         static int seq;
1229         int rlen;
1230         register char *cp = m_rtmsg.m_space;
1231         register int l;
1232
1233 #define NEXTADDR(w, u) \
1234         if (rtm_addrs & (w)) {\
1235             l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\
1236             if (verbose) sodump(&(u),"u");\
1237         }
1238
1239         errno = 0;
1240         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1241         if (cmd == 'a')
1242                 cmd = RTM_ADD;
1243         else if (cmd == 'c')
1244                 cmd = RTM_CHANGE;
1245         else if (cmd == 'g') {
1246                 cmd = RTM_GET;
1247                 if (so_ifp.sa.sa_family == 0) {
1248                         so_ifp.sa.sa_family = AF_LINK;
1249                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1250                         rtm_addrs |= RTA_IFP;
1251                 }
1252         } else
1253                 cmd = RTM_DELETE;
1254 #define rtm m_rtmsg.m_rtm
1255         rtm.rtm_type = cmd;
1256         rtm.rtm_flags = flags;
1257         rtm.rtm_version = RTM_VERSION;
1258         rtm.rtm_seq = ++seq;
1259         rtm.rtm_addrs = rtm_addrs;
1260         rtm.rtm_rmx = rt_metrics;
1261         rtm.rtm_inits = rtm_inits;
1262
1263         if (rtm_addrs & RTA_NETMASK)
1264                 mask_addr();
1265         NEXTADDR(RTA_DST, so_dst);
1266         NEXTADDR(RTA_GATEWAY, so_gate);
1267         NEXTADDR(RTA_NETMASK, so_mask);
1268         NEXTADDR(RTA_GENMASK, so_genmask);
1269         NEXTADDR(RTA_IFP, so_ifp);
1270         NEXTADDR(RTA_IFA, so_ifa);
1271         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1272         if (verbose)
1273                 print_rtmsg(&rtm, l);
1274         if (debugonly)
1275                 return (0);
1276         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1277                 warn("writing to routing socket");
1278                 return (-1);
1279         }
1280         if (cmd == RTM_GET) {
1281                 do {
1282                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1283                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1284                 if (l < 0)
1285                         warn("read from routing socket");
1286                 else
1287                         print_getmsg(&rtm, l);
1288         }
1289 #undef rtm
1290         return (0);
1291 }
1292
1293 void
1294 mask_addr(void)
1295 {
1296         int olen = so_mask.sa.sa_len;
1297         register char *cp1 = olen + (char *)&so_mask, *cp2;
1298
1299         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1300                 if (*--cp1 != 0) {
1301                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1302                         break;
1303                 }
1304         if ((rtm_addrs & RTA_DST) == 0)
1305                 return;
1306         switch (so_dst.sa.sa_family) {
1307 #ifdef NS
1308         case AF_NS:
1309 #endif
1310         case AF_INET:
1311 #ifdef INET6
1312         case AF_INET6:
1313 #endif
1314         case AF_APPLETALK:
1315         case 0:
1316                 return;
1317         }
1318         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1319         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1320         while (cp2 > cp1)
1321                 *--cp2 = 0;
1322         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1323         while (cp1 > so_dst.sa.sa_data)
1324                 *--cp1 &= *--cp2;
1325 }
1326
1327 char *msgtypes[] = {
1328         "",
1329         "RTM_ADD: Add Route",
1330         "RTM_DELETE: Delete Route",
1331         "RTM_CHANGE: Change Metrics or flags",
1332         "RTM_GET: Report Metrics",
1333         "RTM_LOSING: Kernel Suspects Partitioning",
1334         "RTM_REDIRECT: Told to use different route",
1335         "RTM_MISS: Lookup failed on this address",
1336         "RTM_LOCK: fix specified metrics",
1337         "RTM_OLDADD: caused by SIOCADDRT",
1338         "RTM_OLDDEL: caused by SIOCDELRT",
1339         "RTM_RESOLVE: Route created by cloning",
1340         "RTM_NEWADDR: address being added to iface",
1341         "RTM_DELADDR: address being removed from iface",
1342         "RTM_IFINFO: iface status change",
1343         "RTM_NEWMADDR: new multicast group membership on iface",
1344         "RTM_DELMADDR: multicast group membership removed from iface",
1345         "RTM_IFANNOUNCE: interface arrival/departure",
1346         0,
1347 };
1348
1349 char metricnames[] =
1350 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1351 "\1mtu";
1352 char routeflags[] =
1353 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1354 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1355 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1356 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1357 char ifnetflags[] =
1358 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1359 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1360 "\017LINK2\020MULTICAST";
1361 char addrnames[] =
1362 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1363
1364 void
1365 print_rtmsg(register struct rt_msghdr *rtm, int msglen)
1366 {
1367         struct if_msghdr *ifm;
1368         struct ifa_msghdr *ifam;
1369 #ifdef RTM_NEWMADDR
1370         struct ifma_msghdr *ifmam;
1371 #endif
1372         struct if_announcemsghdr *ifan;
1373
1374         if (verbose == 0)
1375                 return;
1376         if (rtm->rtm_version != RTM_VERSION) {
1377                 (void) printf("routing message version %d not understood\n",
1378                     rtm->rtm_version);
1379                 return;
1380         }
1381         if (msgtypes[rtm->rtm_type] != NULL)
1382                 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1383         else
1384                 (void)printf("#%d: ", rtm->rtm_type);
1385         (void)printf("len %d, ", rtm->rtm_msglen);
1386         switch (rtm->rtm_type) {
1387         case RTM_IFINFO:
1388                 ifm = (struct if_msghdr *)rtm;
1389                 (void) printf("if# %d, flags:", ifm->ifm_index);
1390                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1391                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1392                 break;
1393         case RTM_NEWADDR:
1394         case RTM_DELADDR:
1395                 ifam = (struct ifa_msghdr *)rtm;
1396                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1397                 bprintf(stdout, ifam->ifam_flags, routeflags);
1398                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1399                 break;
1400 #ifdef RTM_NEWMADDR
1401         case RTM_NEWMADDR:
1402         case RTM_DELMADDR:
1403                 ifmam = (struct ifma_msghdr *)rtm;
1404                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1405                 break;
1406 #endif
1407         case RTM_IFANNOUNCE:
1408                 ifan = (struct if_announcemsghdr *)rtm;
1409                 (void) printf("if# %d, what: ", ifan->ifan_index);
1410                 switch (ifan->ifan_what) {
1411                 case IFAN_ARRIVAL:
1412                         printf("arrival");
1413                         break;
1414                 case IFAN_DEPARTURE:
1415                         printf("departure");
1416                         break;
1417                 default:
1418                         printf("#%d", ifan->ifan_what);
1419                         break;
1420                 }
1421                 printf("\n");
1422                 break;
1423
1424         default:
1425                 (void) printf("pid: %ld, seq %d, errno %d, flags:",
1426                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1427                 bprintf(stdout, rtm->rtm_flags, routeflags);
1428                 pmsg_common(rtm);
1429         }
1430 }
1431
1432 void
1433 print_getmsg(register struct rt_msghdr *rtm, int msglen)
1434 {
1435         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1436         struct sockaddr_dl *ifp = NULL;
1437         register struct sockaddr *sa;
1438         register char *cp;
1439         register int i;
1440
1441         (void) printf("   route to: %s\n", routename(&so_dst));
1442         if (rtm->rtm_version != RTM_VERSION) {
1443                 warnx("routing message version %d not understood",
1444                      rtm->rtm_version);
1445                 return;
1446         }
1447         if (rtm->rtm_msglen > msglen) {
1448                 warnx("message length mismatch, in packet %d, returned %d",
1449                       rtm->rtm_msglen, msglen);
1450         }
1451         if (rtm->rtm_errno)  {
1452                 errno = rtm->rtm_errno;
1453                 warn("message indicates error %d", errno);
1454                 return;
1455         }
1456         cp = ((char *)(rtm + 1));
1457         if (rtm->rtm_addrs)
1458                 for (i = 1; i; i <<= 1)
1459                         if (i & rtm->rtm_addrs) {
1460                                 sa = (struct sockaddr *)cp;
1461                                 switch (i) {
1462                                 case RTA_DST:
1463                                         dst = sa;
1464                                         break;
1465                                 case RTA_GATEWAY:
1466                                         gate = sa;
1467                                         break;
1468                                 case RTA_NETMASK:
1469                                         mask = sa;
1470                                         break;
1471                                 case RTA_IFP:
1472                                         if (sa->sa_family == AF_LINK &&
1473                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1474                                                 ifp = (struct sockaddr_dl *)sa;
1475                                         break;
1476                                 }
1477                                 ADVANCE(cp, sa);
1478                         }
1479         if (dst && mask)
1480                 mask->sa_family = dst->sa_family;       /* XXX */
1481         if (dst)
1482                 (void)printf("destination: %s\n", routename(dst));
1483         if (mask) {
1484                 int savenflag = nflag;
1485
1486                 nflag = 1;
1487                 (void)printf("       mask: %s\n", routename(mask));
1488                 nflag = savenflag;
1489         }
1490         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1491                 (void)printf("    gateway: %s\n", routename(gate));
1492         if (ifp)
1493                 (void)printf("  interface: %.*s\n",
1494                     ifp->sdl_nlen, ifp->sdl_data);
1495         (void)printf("      flags: ");
1496         bprintf(stdout, rtm->rtm_flags, routeflags);
1497
1498 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1499 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1500
1501         (void) printf("\n%s\n", "\
1502  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
1503         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1504         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1505         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1506         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1507         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1508         printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1509         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1510         if (rtm->rtm_rmx.rmx_expire)
1511                 rtm->rtm_rmx.rmx_expire -= time(0);
1512         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1513 #undef lock
1514 #undef msec
1515 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1516         if (verbose)
1517                 pmsg_common(rtm);
1518         else if (rtm->rtm_addrs &~ RTA_IGN) {
1519                 (void) printf("sockaddrs: ");
1520                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1521                 putchar('\n');
1522         }
1523 #undef  RTA_IGN
1524 }
1525
1526 void
1527 pmsg_common(register struct rt_msghdr *rtm)
1528 {
1529         (void) printf("\nlocks: ");
1530         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1531         (void) printf(" inits: ");
1532         bprintf(stdout, rtm->rtm_inits, metricnames);
1533         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1534 }
1535
1536 void
1537 pmsg_addrs(char *cp, int addrs)
1538 {
1539         register struct sockaddr *sa;
1540         int i;
1541
1542         if (addrs == 0) {
1543                 (void) putchar('\n');
1544                 return;
1545         }
1546         (void) printf("\nsockaddrs: ");
1547         bprintf(stdout, addrs, addrnames);
1548         (void) putchar('\n');
1549         for (i = 1; i; i <<= 1)
1550                 if (i & addrs) {
1551                         sa = (struct sockaddr *)cp;
1552                         (void) printf(" %s", routename(sa));
1553                         ADVANCE(cp, sa);
1554                 }
1555         (void) putchar('\n');
1556         (void) fflush(stdout);
1557 }
1558
1559 void
1560 bprintf(register FILE *fp, register int b, register u_char *s)
1561 {
1562         register int i;
1563         int gotsome = 0;
1564
1565         if (b == 0)
1566                 return;
1567         while ((i = *s++) != 0) {
1568                 if (b & (1 << (i-1))) {
1569                         if (gotsome == 0)
1570                                 i = '<';
1571                         else
1572                                 i = ',';
1573                         (void) putc(i, fp);
1574                         gotsome = 1;
1575                         for (; (i = *s) > 32; s++)
1576                                 (void) putc(i, fp);
1577                 } else
1578                         while (*s > 32)
1579                                 s++;
1580         }
1581         if (gotsome)
1582                 (void) putc('>', fp);
1583 }
1584
1585 int
1586 keyword(char *cp)
1587 {
1588         register struct keytab *kt = keywords;
1589
1590         while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1591                 kt++;
1592         return kt->kt_i;
1593 }
1594
1595 void
1596 sodump(register sup su, char *which)
1597 {
1598         switch (su->sa.sa_family) {
1599         case AF_LINK:
1600                 (void) printf("%s: link %s; ",
1601                     which, link_ntoa(&su->sdl));
1602                 break;
1603         case AF_INET:
1604                 (void) printf("%s: inet %s; ",
1605                     which, inet_ntoa(su->sin.sin_addr));
1606                 break;
1607         case AF_APPLETALK:
1608                 (void) printf("%s: atalk %s; ",
1609                     which, atalk_ntoa(su->sat.sat_addr));
1610                 break;
1611 #ifdef NS
1612         case AF_NS:
1613                 (void) printf("%s: xns %s; ",
1614                     which, ns_ntoa(su->sns.sns_addr));
1615                 break;
1616 #endif
1617         }
1618         (void) fflush(stdout);
1619 }
1620
1621 /* States*/
1622 #define VIRGIN  0
1623 #define GOTONE  1
1624 #define GOTTWO  2
1625 /* Inputs */
1626 #define DIGIT   (4*0)
1627 #define END     (4*1)
1628 #define DELIM   (4*2)
1629
1630 void
1631 sockaddr(register char *addr, register struct sockaddr *sa)
1632 {
1633         register char *cp = (char *)sa;
1634         int size = sa->sa_len;
1635         char *cplim = cp + size;
1636         register int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1637
1638         memset(cp, 0, size);
1639         cp++;
1640         do {
1641                 if ((*addr >= '0') && (*addr <= '9')) {
1642                         new = *addr - '0';
1643                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1644                         new = *addr - 'a' + 10;
1645                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1646                         new = *addr - 'A' + 10;
1647                 } else if (*addr == 0)
1648                         state |= END;
1649                 else
1650                         state |= DELIM;
1651                 addr++;
1652                 switch (state /* | INPUT */) {
1653                 case GOTTWO | DIGIT:
1654                         *cp++ = byte; /*FALLTHROUGH*/
1655                 case VIRGIN | DIGIT:
1656                         state = GOTONE; byte = new; continue;
1657                 case GOTONE | DIGIT:
1658                         state = GOTTWO; byte = new + (byte << 4); continue;
1659                 default: /* | DELIM */
1660                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1661                 case GOTONE | END:
1662                 case GOTTWO | END:
1663                         *cp++ = byte; /* FALLTHROUGH */
1664                 case VIRGIN | END:
1665                         break;
1666                 }
1667                 break;
1668         } while (cp < cplim);
1669         sa->sa_len = cp - (char *)sa;
1670 }
1671
1672 int
1673 atalk_aton(const char *text, struct at_addr *addr)
1674 {
1675         u_int net, node;
1676
1677         if (sscanf(text, "%u.%u", &net, &node) != 2
1678             || net > 0xffff || node > 0xff)
1679                 return(0);
1680         addr->s_net = htons(net);
1681         addr->s_node = node;
1682         return(1);
1683 }
1684
1685 char *
1686 atalk_ntoa(struct at_addr at)
1687 {
1688         static char buf[20];
1689
1690         (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1691         return(buf);
1692 }