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
  34 #ifndef lint
  35 static const char copyright[] =
  36 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)route.c     8.6 (Berkeley) 4/28/95";
  43 #endif
  44 static const char rcsid[] =
  45   "$FreeBSD: src/sbin/route/route.c,v 1.40.2.11 2003/02/27 23:10:10 ru Exp $";
  46 #endif /* not lint */
  47
  48 #include <sys/param.h>
  49 #include <sys/file.h>
  50 #include <sys/socket.h>
  51 #include <sys/ioctl.h>
  52 #include <sys/sysctl.h>
  53 #include <sys/types.h>
  54
  55 #include <net/if.h>
  56 #include <net/route.h>
  57 #include <net/if_dl.h>
  58 #include <netinet/in.h>
  59 #include <netinet/if_ether.h>
  60 #include <netatalk/at.h>
  61 #ifdef NS
  62 #include <netns/ns.h>
  63 #endif
  64 #include <arpa/inet.h>
  65 #include <netdb.h>
  66
  67 #include <ctype.h>
  68 #include <err.h>
  69 #include <errno.h>
  70 #include <paths.h>
  71 #include <stdio.h>
  72 #include <stdlib.h>
  73 #include <string.h>
  74 #include <sysexits.h>
  75 #include <unistd.h>
  76 #include <ifaddrs.h>
  77
  78 struct keytab {
  79         char    *kt_cp;
  80         int     kt_i;
  81 } keywords[] = {
  82 #include "keywords.h"
  83         {0, 0}
  84 };
  85
  86 struct  ortentry route;
  87 union   sockunion {
  88         struct  sockaddr sa;
  89         struct  sockaddr_in sin;
  90 #ifdef INET6
  91         struct  sockaddr_in6 sin6;
  92 #endif
  93         struct  sockaddr_at sat;
  94 #ifdef NS
  95         struct  sockaddr_ns sns;
  96 #endif
  97         struct  sockaddr_dl sdl;
  98         struct  sockaddr_inarp sinarp;
  99         struct  sockaddr_storage ss; /* added to avoid memory overrun */
 100 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
 101
 102 typedef union sockunion *sup;
 103 int     pid, rtm_addrs;
 104 int     s;
 105 int     forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword();
 106 int     iflag, verbose, aflen = sizeof (struct sockaddr_in);
 107 int     locking, lockrest, debugonly;
 108 struct  rt_metrics rt_metrics;
 109 u_long  rtm_inits;
 110 uid_t   uid;
 111 int     atalk_aton __P((const char *, struct at_addr *));
 112 char    *atalk_ntoa __P((struct at_addr));
 113 const char      *routename(), *netname();
 114 void    flushroutes(), newroute(), monitor(), sockaddr(), sodump(), bprintf();
 115 void    print_getmsg(), print_rtmsg(), pmsg_common(), pmsg_addrs(), mask_addr();
 116 #ifdef INET6
 117 static int inet6_makenetandmask __P((struct sockaddr_in6 *, char *));
 118 #endif
 119 int     getaddr(), rtmsg(), x25_makemask();
 120 int     prefixlen();
 121 extern  char *iso_ntoa();
 122
 123 void usage __P((const char *)) __dead2;
 124
 125 void
 126 usage(cp)
 127         const char *cp;
 128 {
 129         if (cp)
 130                 warnx("bad keyword: %s", cp);
 131         (void) fprintf(stderr,
 132             "usage: route [-dnqtv] command [[modifiers] args]\n");
 133         exit(EX_USAGE);
 134         /* NOTREACHED */
 135 }
 136
 137 #define ROUNDUP(a) \
 138         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 139 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 140
 141 int
 142 main(argc, argv)
 143         int argc;
 144         char **argv;
 145 {
 146         int ch;
 147
 148         if (argc < 2)
 149                 usage((char *)NULL);
 150
 151         while ((ch = getopt(argc, argv, "nqdtv")) != -1)
 152                 switch(ch) {
 153                 case 'n':
 154                         nflag = 1;
 155                         break;
 156                 case 'q':
 157                         qflag = 1;
 158                         break;
 159                 case 'v':
 160                         verbose = 1;
 161                         break;
 162                 case 't':
 163                         tflag = 1;
 164                         break;
 165                 case 'd':
 166                         debugonly = 1;
 167                         break;
 168                 case '?':
 169                 default:
 170                         usage((char *)NULL);
 171                 }
 172         argc -= optind;
 173         argv += optind;
 174
 175         pid = getpid();
 176         uid = geteuid();
 177         if (tflag)
 178                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 179         else
 180                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 181         if (s < 0)
 182                 err(EX_OSERR, "socket");
 183         if (*argv)
 184                 switch (keyword(*argv)) {
 185                 case K_GET:
 186                         uid = 0;
 187                         /* FALLTHROUGH */
 188
 189                 case K_CHANGE:
 190                 case K_ADD:
 191                 case K_DELETE:
 192                         newroute(argc, argv);
 193                         /* NOTREACHED */
 194
 195                 case K_MONITOR:
 196                         monitor();
 197                         /* NOTREACHED */
 198
 199                 case K_FLUSH:
 200                         flushroutes(argc, argv);
 201                         exit(0);
 202                         /* NOTREACHED */
 203                 }
 204         usage(*argv);
 205         /* NOTREACHED */
 206 }
 207
 208 /*
 209  * Purge all entries in the routing tables not
 210  * associated with network interfaces.
 211  */
 212 void
 213 flushroutes(argc, argv)
 214         int argc;
 215         char *argv[];
 216 {
 217         size_t needed;
 218         int mib[6], rlen, seqno;
 219         char *buf, *next, *lim;
 220         register struct rt_msghdr *rtm;
 221
 222         if (uid) {
 223                 errx(EX_NOPERM, "must be root to alter routing table");
 224         }
 225         shutdown(s, 0); /* Don't want to read back our messages */
 226         if (argc > 1) {
 227                 argv++;
 228                 if (argc == 2 && **argv == '-')
 229                     switch (keyword(*argv + 1)) {
 230                         case K_INET:
 231                                 af = AF_INET;
 232                                 break;
 233 #ifdef INET6
 234                         case K_INET6:
 235                                 af = AF_INET6;
 236                                 break;
 237 #endif
 238                         case K_ATALK:
 239                                 af = AF_APPLETALK;
 240                                 break;
 241 #ifdef NS
 242                         case K_XNS:
 243                                 af = AF_NS;
 244                                 break;
 245 #endif
 246                         case K_LINK:
 247                                 af = AF_LINK;
 248                                 break;
 249                         default:
 250                                 goto bad;
 251                 } else
 252 bad:                    usage(*argv);
 253         }
 254         mib[0] = CTL_NET;
 255         mib[1] = PF_ROUTE;
 256         mib[2] = 0;             /* protocol */
 257         mib[3] = 0;             /* wildcard address family */
 258         mib[4] = NET_RT_DUMP;
 259         mib[5] = 0;             /* no flags */
 260         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 261                 err(EX_OSERR, "route-sysctl-estimate");
 262         if ((buf = malloc(needed)) == NULL)
 263                 errx(EX_OSERR, "malloc failed");
 264         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 265                 err(EX_OSERR, "route-sysctl-get");
 266         lim = buf + needed;
 267         if (verbose)
 268                 (void) printf("Examining routing table from sysctl\n");
 269         seqno = 0;              /* ??? */
 270         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 271                 rtm = (struct rt_msghdr *)next;
 272                 if (verbose)
 273                         print_rtmsg(rtm, rtm->rtm_msglen);
 274                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 275                         continue;
 276                 if (af) {
 277                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 278
 279                         if (sa->sa_family != af)
 280                                 continue;
 281                 }
 282                 if (debugonly)
 283                         continue;
 284                 rtm->rtm_type = RTM_DELETE;
 285                 rtm->rtm_seq = seqno;
 286                 rlen = write(s, next, rtm->rtm_msglen);
 287                 if (rlen < (int)rtm->rtm_msglen) {
 288                         warn("write to routing socket");
 289                         (void) printf("got only %d for rlen\n", rlen);
 290                         break;
 291                 }
 292                 seqno++;
 293                 if (qflag)
 294                         continue;
 295                 if (verbose)
 296                         print_rtmsg(rtm, rlen);
 297                 else {
 298                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 299                         (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 300                             routename(sa) : netname(sa));
 301                         sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
 302                         (void) printf("%-20.20s ", routename(sa));
 303                         (void) printf("done\n");
 304                 }
 305         }
 306 }
 307
 308 const char *
 309 routename(sa)
 310         struct sockaddr *sa;
 311 {
 312         register char *cp;
 313         static char line[MAXHOSTNAMELEN + 1];
 314         struct hostent *hp;
 315         static char domain[MAXHOSTNAMELEN + 1];
 316         static int first = 1;
 317 #ifdef NS
 318         char *ns_print();
 319 #endif
 320
 321         if (first) {
 322                 first = 0;
 323                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 324                     (cp = strchr(domain, '.'))) {
 325                         domain[MAXHOSTNAMELEN] = '\0';
 326                         (void) strcpy(domain, cp + 1);
 327                 } else
 328                         domain[0] = 0;
 329         }
 330
 331         if (sa->sa_len == 0)
 332                 strcpy(line, "default");
 333         else switch (sa->sa_family) {
 334
 335         case AF_INET:
 336             {   struct in_addr in;
 337                 in = ((struct sockaddr_in *)sa)->sin_addr;
 338
 339                 cp = 0;
 340                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 341                         cp = "default";
 342                 if (cp == 0 && !nflag) {
 343                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 344                                 AF_INET);
 345                         if (hp) {
 346                                 if ((cp = strchr(hp->h_name, '.')) &&
 347                                     !strcmp(cp + 1, domain))
 348                                         *cp = 0;
 349                                 cp = hp->h_name;
 350                         }
 351                 }
 352                 if (cp) {
 353                         strncpy(line, cp, sizeof(line) - 1);
 354                         line[sizeof(line) - 1] = '\0';
 355                 } else
 356                         (void) sprintf(line, "%s", inet_ntoa(in));
 357                 break;
 358             }
 359
 360 #ifdef INET6
 361         case AF_INET6:
 362         {
 363                 struct sockaddr_in6 sin6; /* use static var for safety */
 364                 int niflags = 0;
 365 #ifdef NI_WITHSCOPEID
 366                 niflags = NI_WITHSCOPEID;
 367 #endif
 368
 369                 memset(&sin6, 0, sizeof(sin6));
 370                 memcpy(&sin6, sa, sa->sa_len);
 371                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 372                 sin6.sin6_family = AF_INET6;
 373 #ifdef __KAME__
 374                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 375                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 376                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 377                     sin6.sin6_scope_id == 0) {
 378                         sin6.sin6_scope_id =
 379                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 380                         sin6.sin6_addr.s6_addr[2] = 0;
 381                         sin6.sin6_addr.s6_addr[3] = 0;
 382                 }
 383 #endif
 384                 if (nflag)
 385                         niflags |= NI_NUMERICHOST;
 386                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 387                     line, sizeof(line), NULL, 0, niflags) != 0)
 388                         strncpy(line, "invalid", sizeof(line));
 389
 390                 return(line);
 391         }
 392 #endif
 393
 394         case AF_APPLETALK:
 395                 (void) snprintf(line, sizeof(line), "atalk %s",
 396                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 397                 break;
 398
 399 #ifdef NS
 400         case AF_NS:
 401                 return (ns_print((struct sockaddr_ns *)sa));
 402 #endif
 403
 404         case AF_LINK:
 405                 return (link_ntoa((struct sockaddr_dl *)sa));
 406
 407         default:
 408             {   u_short *s = (u_short *)sa;
 409                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 410                 char *cp = line + sprintf(line, "(%d)", sa->sa_family);
 411                 char *cpe = line + sizeof(line);
 412
 413                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 414                         cp += snprintf(cp, cpe - cp, " %x", *s);
 415                 break;
 416             }
 417         }
 418         return (line);
 419 }
 420
 421 /*
 422  * Return the name of the network whose address is given.
 423  * The address is assumed to be that of a net or subnet, not a host.
 424  */
 425 const char *
 426 netname(sa)
 427         struct sockaddr *sa;
 428 {
 429         char *cp = 0;
 430         static char line[MAXHOSTNAMELEN + 1];
 431         struct netent *np = 0;
 432         u_long net, mask;
 433         register u_long i;
 434         int subnetshift;
 435 #ifdef NS
 436         char *ns_print();
 437 #endif
 438
 439         switch (sa->sa_family) {
 440
 441         case AF_INET:
 442             {   struct in_addr in;
 443                 in = ((struct sockaddr_in *)sa)->sin_addr;
 444
 445                 i = in.s_addr = ntohl(in.s_addr);
 446                 if (in.s_addr == 0)
 447                         cp = "default";
 448                 else if (!nflag) {
 449                         if (IN_CLASSA(i)) {
 450                                 mask = IN_CLASSA_NET;
 451                                 subnetshift = 8;
 452                         } else if (IN_CLASSB(i)) {
 453                                 mask = IN_CLASSB_NET;
 454                                 subnetshift = 8;
 455                         } else {
 456                                 mask = IN_CLASSC_NET;
 457                                 subnetshift = 4;
 458                         }
 459                         /*
 460                          * If there are more bits than the standard mask
 461                          * would suggest, subnets must be in use.
 462                          * Guess at the subnet mask, assuming reasonable
 463                          * width subnet fields.
 464                          */
 465                         while (in.s_addr &~ mask)
 466                                 mask = (long)mask >> subnetshift;
 467                         net = in.s_addr & mask;
 468                         while ((mask & 1) == 0)
 469                                 mask >>= 1, net >>= 1;
 470                         np = getnetbyaddr(net, AF_INET);
 471                         if (np)
 472                                 cp = np->n_name;
 473                 }
 474 #define C(x)    (unsigned)((x) & 0xff)
 475                 if (cp)
 476                         strncpy(line, cp, sizeof(line));
 477                 else if ((in.s_addr & 0xffffff) == 0)
 478                         (void) sprintf(line, "%u", C(in.s_addr >> 24));
 479                 else if ((in.s_addr & 0xffff) == 0)
 480                         (void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
 481                             C(in.s_addr >> 16));
 482                 else if ((in.s_addr & 0xff) == 0)
 483                         (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 484                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 485                 else
 486                         (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 487                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 488                             C(in.s_addr));
 489 #undef C
 490                 break;
 491             }
 492
 493 #ifdef INET6
 494         case AF_INET6:
 495         {
 496                 struct sockaddr_in6 sin6; /* use static var for safety */
 497                 int niflags = 0;
 498 #ifdef NI_WITHSCOPEID
 499                 niflags = NI_WITHSCOPEID;
 500 #endif
 501
 502                 memset(&sin6, 0, sizeof(sin6));
 503                 memcpy(&sin6, sa, sa->sa_len);
 504                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 505                 sin6.sin6_family = AF_INET6;
 506 #ifdef __KAME__
 507                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 508                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 509                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 510                     sin6.sin6_scope_id == 0) {
 511                         sin6.sin6_scope_id =
 512                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 513                         sin6.sin6_addr.s6_addr[2] = 0;
 514                         sin6.sin6_addr.s6_addr[3] = 0;
 515                 }
 516 #endif
 517                 if (nflag)
 518                         niflags |= NI_NUMERICHOST;
 519                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 520                     line, sizeof(line), NULL, 0, niflags) != 0)
 521                         strncpy(line, "invalid", sizeof(line));
 522
 523                 return(line);
 524         }
 525 #endif
 526
 527         case AF_APPLETALK:
 528                 (void) snprintf(line, sizeof(line), "atalk %s",
 529                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 530                 break;
 531
 532 #ifdef NS
 533         case AF_NS:
 534                 return (ns_print((struct sockaddr_ns *)sa));
 535                 break;
 536 #endif
 537
 538         case AF_LINK:
 539                 return (link_ntoa((struct sockaddr_dl *)sa));
 540
 541
 542         default:
 543             {   u_short *s = (u_short *)sa->sa_data;
 544                 u_short *slim = s + ((sa->sa_len + 1)>>1);
 545                 char *cp = line + sprintf(line, "af %d:", sa->sa_family);
 546                 char *cpe = line + sizeof(line);
 547
 548                 while (s < slim && cp < cpe)
 549                         cp += snprintf(cp, cpe - cp, " %x", *s++);
 550                 break;
 551             }
 552         }
 553         return (line);
 554 }
 555
 556 void
 557 set_metric(value, key)
 558         char *value;
 559         int key;
 560 {
 561         int flag = 0;
 562         u_long noval, *valp = &noval;
 563
 564         switch (key) {
 565 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 566         caseof(K_MTU, RTV_MTU, rmx_mtu);
 567         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 568         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 569         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 570         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 571         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 572         caseof(K_RTT, RTV_RTT, rmx_rtt);
 573         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 574         }
 575         rtm_inits |= flag;
 576         if (lockrest || locking)
 577                 rt_metrics.rmx_locks |= flag;
 578         if (locking)
 579                 locking = 0;
 580         *valp = atoi(value);
 581 }
 582
 583 void
 584 newroute(argc, argv)
 585         int argc;
 586         register char **argv;
 587 {
 588         char *cmd, *dest = "", *gateway = "", *err;
 589         int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 590         int key;
 591         struct hostent *hp = 0;
 592
 593         if (uid) {
 594                 errx(EX_NOPERM, "must be root to alter routing table");
 595         }
 596         cmd = argv[0];
 597         if (*cmd != 'g')
 598                 shutdown(s, 0); /* Don't want to read back our messages */
 599         while (--argc > 0) {
 600                 if (**(++argv)== '-') {
 601                         switch (key = keyword(1 + *argv)) {
 602                         case K_LINK:
 603                                 af = AF_LINK;
 604                                 aflen = sizeof(struct sockaddr_dl);
 605                                 break;
 606                         case K_INET:
 607                                 af = AF_INET;
 608                                 aflen = sizeof(struct sockaddr_in);
 609                                 break;
 610 #ifdef INET6
 611                         case K_INET6:
 612                                 af = AF_INET6;
 613                                 aflen = sizeof(struct sockaddr_in6);
 614                                 break;
 615 #endif
 616                         case K_ATALK:
 617                                 af = AF_APPLETALK;
 618                                 aflen = sizeof(struct sockaddr_at);
 619                                 break;
 620                         case K_SA:
 621                                 af = PF_ROUTE;
 622                                 aflen = sizeof(union sockunion);
 623                                 break;
 624 #ifdef NS
 625                         case K_XNS:
 626                                 af = AF_NS;
 627                                 aflen = sizeof(struct sockaddr_ns);
 628                                 break;
 629 #endif
 630                         case K_IFACE:
 631                         case K_INTERFACE:
 632                                 iflag++;
 633                                 break;
 634                         case K_NOSTATIC:
 635                                 flags &= ~RTF_STATIC;
 636                                 break;
 637                         case K_LLINFO:
 638                                 flags |= RTF_LLINFO;
 639                                 break;
 640                         case K_LOCK:
 641                                 locking = 1;
 642                                 break;
 643                         case K_LOCKREST:
 644                                 lockrest = 1;
 645                                 break;
 646                         case K_HOST:
 647                                 forcehost++;
 648                                 break;
 649                         case K_REJECT:
 650                                 flags |= RTF_REJECT;
 651                                 break;
 652                         case K_BLACKHOLE:
 653                                 flags |= RTF_BLACKHOLE;
 654                                 break;
 655                         case K_PROTO1:
 656                                 flags |= RTF_PROTO1;
 657                                 break;
 658                         case K_PROTO2:
 659                                 flags |= RTF_PROTO2;
 660                                 break;
 661                         case K_PROXY:
 662                                 proxy = 1;
 663                                 break;
 664                         case K_CLONING:
 665                                 flags |= RTF_CLONING;
 666                                 break;
 667                         case K_XRESOLVE:
 668                                 flags |= RTF_XRESOLVE;
 669                                 break;
 670                         case K_STATIC:
 671                                 flags |= RTF_STATIC;
 672                                 break;
 673                         case K_IFA:
 674                                 if (!--argc)
 675                                         usage((char *)NULL);
 676                                 (void) getaddr(RTA_IFA, *++argv, 0);
 677                                 break;
 678                         case K_IFP:
 679                                 if (!--argc)
 680                                         usage((char *)NULL);
 681                                 (void) getaddr(RTA_IFP, *++argv, 0);
 682                                 break;
 683                         case K_GENMASK:
 684                                 if (!--argc)
 685                                         usage((char *)NULL);
 686                                 (void) getaddr(RTA_GENMASK, *++argv, 0);
 687                                 break;
 688                         case K_GATEWAY:
 689                                 if (!--argc)
 690                                         usage((char *)NULL);
 691                                 (void) getaddr(RTA_GATEWAY, *++argv, 0);
 692                                 break;
 693                         case K_DST:
 694                                 if (!--argc)
 695                                         usage((char *)NULL);
 696                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 697                                 dest = *argv;
 698                                 break;
 699                         case K_NETMASK:
 700                                 if (!--argc)
 701                                         usage((char *)NULL);
 702                                 (void) getaddr(RTA_NETMASK, *++argv, 0);
 703                                 /* FALLTHROUGH */
 704                         case K_NET:
 705                                 forcenet++;
 706                                 break;
 707                         case K_PREFIXLEN:
 708                                 if (!--argc)
 709                                         usage((char *)NULL);
 710                                 if (prefixlen(*++argv) == -1) {
 711                                         forcenet = 0;
 712                                         ishost = 1;
 713                                 } else {
 714                                         forcenet = 1;
 715                                         ishost = 0;
 716                                 }
 717                                 break;
 718                         case K_MTU:
 719                         case K_HOPCOUNT:
 720                         case K_EXPIRE:
 721                         case K_RECVPIPE:
 722                         case K_SENDPIPE:
 723                         case K_SSTHRESH:
 724                         case K_RTT:
 725                         case K_RTTVAR:
 726                                 if (!--argc)
 727                                         usage((char *)NULL);
 728                                 set_metric(*++argv, key);
 729                                 break;
 730                         default:
 731                                 usage(1+*argv);
 732                         }
 733                 } else {
 734                         if ((rtm_addrs & RTA_DST) == 0) {
 735                                 dest = *argv;
 736                                 ishost = getaddr(RTA_DST, *argv, &hp);
 737                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 738                                 gateway = *argv;
 739                                 (void) getaddr(RTA_GATEWAY, *argv, &hp);
 740                         } else {
 741                                 (void) getaddr(RTA_NETMASK, *argv, 0);
 742                                 forcenet = 1;
 743                         }
 744                 }
 745         }
 746         if (forcehost) {
 747                 ishost = 1;
 748 #ifdef INET6
 749                 if (af == AF_INET6) {
 750                         rtm_addrs &= ~RTA_NETMASK;
 751                         memset((void *)&so_mask, 0, sizeof(so_mask));
 752                 }
 753 #endif
 754         }
 755         if (forcenet)
 756                 ishost = 0;
 757         flags |= RTF_UP;
 758         if (ishost)
 759                 flags |= RTF_HOST;
 760         if (iflag == 0)
 761                 flags |= RTF_GATEWAY;
 762         if (proxy) {
 763                 so_dst.sinarp.sin_other = SIN_PROXY;
 764                 flags |= RTF_ANNOUNCE;
 765         }
 766         for (attempts = 1; ; attempts++) {
 767                 errno = 0;
 768                 if ((ret = rtmsg(*cmd, flags)) == 0)
 769                         break;
 770                 if (errno != ENETUNREACH && errno != ESRCH)
 771                         break;
 772                 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 773                         hp->h_addr_list++;
 774                         memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0],
 775                             MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
 776                 } else
 777                         break;
 778         }
 779         if (*cmd == 'g')
 780                 exit(0);
 781         if (!qflag) {
 782                 oerrno = errno;
 783                 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 784                 if (*gateway) {
 785                         (void) printf(": gateway %s", gateway);
 786                         if (attempts > 1 && ret == 0 && af == AF_INET)
 787                             (void) printf(" (%s)",
 788                                 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
 789                 }
 790                 if (ret == 0) {
 791                         (void) printf("\n");
 792                 } else {
 793                         switch (oerrno) {
 794                         case ESRCH:
 795                                 err = "not in table";
 796                                 break;
 797                         case EBUSY:
 798                                 err = "entry in use";
 799                                 break;
 800                         case ENOBUFS:
 801                                 err = "routing table overflow";
 802                                 break;
 803                         case EDQUOT: /* handle recursion avoidance in rt_setgate() */
 804                                 err = "gateway uses the same route";
 805                                 break;
 806                         default:
 807                                 err = strerror(oerrno);
 808                                 break;
 809                         }
 810                         (void) printf(": %s\n", err);
 811                 }
 812         }
 813         exit(ret != 0);
 814 }
 815
 816 void
 817 inet_makenetandmask(net, sin, bits)
 818         u_long net, bits;
 819         register struct sockaddr_in *sin;
 820 {
 821         u_long addr, mask = 0;
 822         register char *cp;
 823
 824         rtm_addrs |= RTA_NETMASK;
 825         if (net == 0)
 826                 mask = addr = 0;
 827         else if (net < 128) {
 828                 addr = net << IN_CLASSA_NSHIFT;
 829                 mask = IN_CLASSA_NET;
 830         } else if (net < 65536) {
 831                 addr = net << IN_CLASSB_NSHIFT;
 832                 mask = IN_CLASSB_NET;
 833         } else if (net < 16777216L) {
 834                 addr = net << IN_CLASSC_NSHIFT;
 835                 mask = IN_CLASSC_NET;
 836         } else {
 837                 addr = net;
 838                 if ((addr & IN_CLASSA_HOST) == 0)
 839                         mask =  IN_CLASSA_NET;
 840                 else if ((addr & IN_CLASSB_HOST) == 0)
 841                         mask =  IN_CLASSB_NET;
 842                 else if ((addr & IN_CLASSC_HOST) == 0)
 843                         mask =  IN_CLASSC_NET;
 844                 else
 845                         mask = -1;
 846         }
 847         if (bits)
 848                 mask = 0xffffffff << (32 - bits);
 849         sin->sin_addr.s_addr = htonl(addr);
 850         sin = &so_mask.sin;
 851         sin->sin_addr.s_addr = htonl(mask);
 852         sin->sin_len = 0;
 853         sin->sin_family = 0;
 854         cp = (char *)(&sin->sin_addr + 1);
 855         while (*--cp == 0 && cp > (char *)sin)
 856                 ;
 857         sin->sin_len = 1 + cp - (char *)sin;
 858 }
 859
 860 #ifdef INET6
 861 /*
 862  * XXX the function may need more improvement...
 863  */
 864 static int
 865 inet6_makenetandmask(sin6, plen)
 866         struct sockaddr_in6 *sin6;
 867         char *plen;
 868 {
 869         struct in6_addr in6;
 870
 871         if (!plen) {
 872                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 873                     sin6->sin6_scope_id == 0) {
 874                         plen = "0";
 875                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 876                         /* aggregatable global unicast - RFC2374 */
 877                         memset(&in6, 0, sizeof(in6));
 878                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
 879                                     &in6.s6_addr[8], 8))
 880                                 plen = "64";
 881                 }
 882         }
 883
 884         if (!plen || strcmp(plen, "128") == 0)
 885                 return 1;
 886         rtm_addrs |= RTA_NETMASK;
 887         (void)prefixlen(plen);
 888         return 0;
 889 }
 890 #endif
 891
 892 /*
 893  * Interpret an argument as a network address of some kind,
 894  * returning 1 if a host address, 0 if a network address.
 895  */
 896 int
 897 getaddr(which, s, hpp)
 898         int which;
 899         char *s;
 900         struct hostent **hpp;
 901 {
 902         register sup su;
 903         struct hostent *hp;
 904         struct netent *np;
 905         u_long val;
 906         char *q;
 907         int afamily;  /* local copy of af so we can change it */
 908
 909         if (af == 0) {
 910                 af = AF_INET;
 911                 aflen = sizeof(struct sockaddr_in);
 912         }
 913         afamily = af;
 914         rtm_addrs |= which;
 915         switch (which) {
 916         case RTA_DST:
 917                 su = &so_dst;
 918                 break;
 919         case RTA_GATEWAY:
 920                 su = &so_gate;
 921                 if (iflag) {
 922                         struct ifaddrs *ifap, *ifa;
 923                         struct sockaddr_dl *sdl = NULL;
 924
 925                         if (getifaddrs(&ifap))
 926                                 err(1, "getifaddrs");
 927
 928                         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 929                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 930                                         continue;
 931
 932                                 if (strcmp(s, ifa->ifa_name))
 933                                         continue;
 934
 935                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 936                         }
 937                         /* If we found it, then use it */
 938                         if (sdl) {
 939                                 /*
 940                                  * Copy is safe since we have a
 941                                  * sockaddr_storage member in sockunion{}.
 942                                  * Note that we need to copy before calling
 943                                  * freeifaddrs().
 944                                  */
 945                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 946                         }
 947                         freeifaddrs(ifap);
 948                         if (sdl)
 949                                 return(1);
 950                 }
 951                 break;
 952         case RTA_NETMASK:
 953                 su = &so_mask;
 954                 break;
 955         case RTA_GENMASK:
 956                 su = &so_genmask;
 957                 break;
 958         case RTA_IFP:
 959                 su = &so_ifp;
 960                 afamily = AF_LINK;
 961                 break;
 962         case RTA_IFA:
 963                 su = &so_ifa;
 964                 break;
 965         default:
 966                 usage("internal error");
 967                 /*NOTREACHED*/
 968         }
 969         su->sa.sa_len = aflen;
 970         su->sa.sa_family = afamily; /* cases that don't want it have left already */
 971         if (strcmp(s, "default") == 0) {
 972                 /*
 973                  * Default is net 0.0.0.0/0
 974                  */
 975                 switch (which) {
 976                 case RTA_DST:
 977                         forcenet++;
 978                         /* bzero(su, sizeof(*su)); *//* for readability */
 979                         (void) getaddr(RTA_NETMASK, s, 0);
 980                         break;
 981                 case RTA_NETMASK:
 982                 case RTA_GENMASK:
 983                         /* bzero(su, sizeof(*su)); *//* for readability */
 984                 }
 985                 return (0);
 986         }
 987         switch (afamily) {
 988 #ifdef INET6
 989         case AF_INET6:
 990         {
 991                 struct addrinfo hints, *res;
 992
 993                 q = NULL;
 994                 if (which == RTA_DST && (q = strchr(s, '/')) != NULL)
 995                         *q = '\0';
 996                 memset(&hints, 0, sizeof(hints));
 997                 hints.ai_family = afamily;      /*AF_INET6*/
 998                 hints.ai_flags = AI_NUMERICHOST;
 999                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
1000                 if (getaddrinfo(s, "0", &hints, &res) != 0 ||
1001                     res->ai_family != AF_INET6 ||
1002                     res->ai_addrlen != sizeof(su->sin6)) {
1003                         (void) fprintf(stderr, "%s: bad value\n", s);
1004                         exit(1);
1005                 }
1006                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
1007 #ifdef __KAME__
1008                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
1009                      IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) &&
1010                     su->sin6.sin6_scope_id) {
1011                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1012                                 htons(su->sin6.sin6_scope_id);
1013                         su->sin6.sin6_scope_id = 0;
1014                 }
1015 #endif
1016                 freeaddrinfo(res);
1017                 if (q != NULL)
1018                         *q++ = '/';
1019                 if (which == RTA_DST)
1020                         return (inet6_makenetandmask(&su->sin6, q));
1021                 return (0);
1022         }
1023 #endif /* INET6 */
1024
1025 #ifdef NS
1026         case AF_NS:
1027                 if (which == RTA_DST) {
1028                         extern short ns_bh[3];
1029                         struct sockaddr_ns *sms = &(so_mask.sns);
1030                         memset(sms, 0, sizeof(*sms));
1031                         sms->sns_family = 0;
1032                         sms->sns_len = 6;
1033                         sms->sns_addr.x_net = *(union ns_net *)ns_bh;
1034                         rtm_addrs |= RTA_NETMASK;
1035                 }
1036                 su->sns.sns_addr = ns_addr(s);
1037                 return (!ns_nullhost(su->sns.sns_addr));
1038 #endif
1039
1040
1041         case AF_APPLETALK:
1042                 if (!atalk_aton(s, &su->sat.sat_addr))
1043                         errx(EX_NOHOST, "bad address: %s", s);
1044                 rtm_addrs |= RTA_NETMASK;
1045                 return(forcehost || su->sat.sat_addr.s_node != 0);
1046
1047         case AF_LINK:
1048                 link_addr(s, &su->sdl);
1049                 return (1);
1050
1051
1052         case PF_ROUTE:
1053                 su->sa.sa_len = sizeof(*su);
1054                 sockaddr(s, &su->sa);
1055                 return (1);
1056
1057         case AF_INET:
1058         default:
1059                 break;
1060         }
1061
1062         if (hpp == NULL)
1063                 hpp = &hp;
1064         *hpp = NULL;
1065
1066         q = strchr(s,'/');
1067         if (q && which == RTA_DST) {
1068                 *q = '\0';
1069                 if ((val = inet_network(s)) != INADDR_NONE) {
1070                         inet_makenetandmask(
1071                                 val, &su->sin, strtoul(q+1, 0, 0));
1072                         return (0);
1073                 }
1074                 *q = '/';
1075         }
1076         if ((which != RTA_DST || forcenet == 0) &&
1077             inet_aton(s, &su->sin.sin_addr)) {
1078                 val = su->sin.sin_addr.s_addr;
1079                 if (which != RTA_DST ||
1080                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1081                         return (1);
1082                 else {
1083                         val = ntohl(val);
1084                         goto netdone;
1085                 }
1086         }
1087         if (which == RTA_DST && forcehost == 0 &&
1088             ((val = inet_network(s)) != INADDR_NONE ||
1089             ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
1090 netdone:
1091                 inet_makenetandmask(val, &su->sin, 0);
1092                 return (0);
1093         }
1094         hp = gethostbyname(s);
1095         if (hp) {
1096                 *hpp = hp;
1097                 su->sin.sin_family = hp->h_addrtype;
1098                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1099                     MIN(hp->h_length, sizeof(su->sin.sin_addr)));
1100                 return (1);
1101         }
1102         errx(EX_NOHOST, "bad address: %s", s);
1103 }
1104
1105 int
1106 prefixlen(s)
1107         char *s;
1108 {
1109         int len = atoi(s), q, r;
1110         int max;
1111         char *p;
1112
1113         rtm_addrs |= RTA_NETMASK;
1114         switch (af) {
1115 #ifdef INET6
1116         case AF_INET6:
1117                 max = 128;
1118                 p = (char *)&so_mask.sin6.sin6_addr;
1119                 break;
1120 #endif
1121         case AF_INET:
1122                 max = 32;
1123                 p = (char *)&so_mask.sin.sin_addr;
1124                 break;
1125         default:
1126                 (void) fprintf(stderr, "prefixlen not supported in this af\n");
1127                 exit(1);
1128                 /*NOTREACHED*/
1129         }
1130
1131         if (len < 0 || max < len) {
1132                 (void) fprintf(stderr, "%s: bad value\n", s);
1133                 exit(1);
1134         }
1135
1136         q = len >> 3;
1137         r = len & 7;
1138         so_mask.sa.sa_family = af;
1139         so_mask.sa.sa_len = aflen;
1140         memset((void *)p, 0, max / 8);
1141         if (q > 0)
1142                 memset((void *)p, 0xff, q);
1143         if (r > 0)
1144                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1145         if (len == max)
1146                 return -1;
1147         else
1148                 return len;
1149 }
1150
1151 #ifdef NS
1152 short ns_nullh[] = {0,0,0};
1153 short ns_bh[] = {-1,-1,-1};
1154
1155 char *
1156 ns_print(sns)
1157         struct sockaddr_ns *sns;
1158 {
1159         struct ns_addr work;
1160         union { union ns_net net_e; u_long long_e; } net;
1161         u_short port;
1162         static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25];
1163         char *host = "";
1164         register char *p;
1165         register u_char *q;
1166
1167         work = sns->sns_addr;
1168         port = ntohs(work.x_port);
1169         work.x_port = 0;
1170         net.net_e  = work.x_net;
1171         if (ns_nullhost(work) && net.long_e == 0) {
1172                 if (!port)
1173                         return ("*.*");
1174                 (void) sprintf(mybuf, "*.%XH", port);
1175                 return (mybuf);
1176         }
1177
1178         if (memcmp(ns_bh, work.x_host.c_host, 6) == 0)
1179                 host = "any";
1180         else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0)
1181                 host = "*";
1182         else {
1183                 q = work.x_host.c_host;
1184                 (void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH",
1185                         q[0], q[1], q[2], q[3], q[4], q[5]);
1186                 for (p = chost; *p == '0' && p < chost + 12; p++)
1187                         /* void */;
1188                 host = p;
1189         }
1190         if (port)
1191                 (void) sprintf(cport, ".%XH", htons(port));
1192         else
1193                 *cport = 0;
1194
1195         (void) snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s",
1196                         (unsigned long)ntohl(net.long_e),
1197                         host, cport);
1198         return (mybuf);
1199 }
1200 #endif
1201
1202 void
1203 interfaces()
1204 {
1205         size_t needed;
1206         int mib[6];
1207         char *buf, *lim, *next;
1208         register struct rt_msghdr *rtm;
1209
1210         mib[0] = CTL_NET;
1211         mib[1] = PF_ROUTE;
1212         mib[2] = 0;             /* protocol */
1213         mib[3] = 0;             /* wildcard address family */
1214         mib[4] = NET_RT_IFLIST;
1215         mib[5] = 0;             /* no flags */
1216         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1217                 err(EX_OSERR, "route-sysctl-estimate");
1218         if ((buf = malloc(needed)) == NULL)
1219                 errx(EX_OSERR, "malloc failed");
1220         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1221                 err(EX_OSERR, "actual retrieval of interface table");
1222         lim = buf + needed;
1223         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1224                 rtm = (struct rt_msghdr *)next;
1225                 print_rtmsg(rtm, rtm->rtm_msglen);
1226         }
1227 }
1228
1229 void
1230 monitor()
1231 {
1232         int n;
1233         char msg[2048];
1234
1235         verbose = 1;
1236         if (debugonly) {
1237                 interfaces();
1238                 exit(0);
1239         }
1240         for(;;) {
1241                 time_t now;
1242                 n = read(s, msg, 2048);
1243                 now = time(NULL);
1244                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1245                 print_rtmsg((struct rt_msghdr *)msg, n);
1246         }
1247 }
1248
1249 struct {
1250         struct  rt_msghdr m_rtm;
1251         char    m_space[512];
1252 } m_rtmsg;
1253
1254 int
1255 rtmsg(cmd, flags)
1256         int cmd, flags;
1257 {
1258         static int seq;
1259         int rlen;
1260         register char *cp = m_rtmsg.m_space;
1261         register int l;
1262
1263 #define NEXTADDR(w, u) \
1264         if (rtm_addrs & (w)) {\
1265             l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\
1266             if (verbose) sodump(&(u),"u");\
1267         }
1268
1269         errno = 0;
1270         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1271         if (cmd == 'a')
1272                 cmd = RTM_ADD;
1273         else if (cmd == 'c')
1274                 cmd = RTM_CHANGE;
1275         else if (cmd == 'g') {
1276                 cmd = RTM_GET;
1277                 if (so_ifp.sa.sa_family == 0) {
1278                         so_ifp.sa.sa_family = AF_LINK;
1279                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1280                         rtm_addrs |= RTA_IFP;
1281                 }
1282         } else
1283                 cmd = RTM_DELETE;
1284 #define rtm m_rtmsg.m_rtm
1285         rtm.rtm_type = cmd;
1286         rtm.rtm_flags = flags;
1287         rtm.rtm_version = RTM_VERSION;
1288         rtm.rtm_seq = ++seq;
1289         rtm.rtm_addrs = rtm_addrs;
1290         rtm.rtm_rmx = rt_metrics;
1291         rtm.rtm_inits = rtm_inits;
1292
1293         if (rtm_addrs & RTA_NETMASK)
1294                 mask_addr();
1295         NEXTADDR(RTA_DST, so_dst);
1296         NEXTADDR(RTA_GATEWAY, so_gate);
1297         NEXTADDR(RTA_NETMASK, so_mask);
1298         NEXTADDR(RTA_GENMASK, so_genmask);
1299         NEXTADDR(RTA_IFP, so_ifp);
1300         NEXTADDR(RTA_IFA, so_ifa);
1301         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1302         if (verbose)
1303                 print_rtmsg(&rtm, l);
1304         if (debugonly)
1305                 return (0);
1306         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1307                 warn("writing to routing socket");
1308                 return (-1);
1309         }
1310         if (cmd == RTM_GET) {
1311                 do {
1312                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1313                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1314                 if (l < 0)
1315                         warn("read from routing socket");
1316                 else
1317                         print_getmsg(&rtm, l);
1318         }
1319 #undef rtm
1320         return (0);
1321 }
1322
1323 void
1324 mask_addr()
1325 {
1326         int olen = so_mask.sa.sa_len;
1327         register char *cp1 = olen + (char *)&so_mask, *cp2;
1328
1329         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1330                 if (*--cp1 != 0) {
1331                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1332                         break;
1333                 }
1334         if ((rtm_addrs & RTA_DST) == 0)
1335                 return;
1336         switch (so_dst.sa.sa_family) {
1337 #ifdef NS
1338         case AF_NS:
1339 #endif
1340         case AF_INET:
1341 #ifdef INET6
1342         case AF_INET6:
1343 #endif
1344         case AF_APPLETALK:
1345         case 0:
1346                 return;
1347         }
1348         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1349         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1350         while (cp2 > cp1)
1351                 *--cp2 = 0;
1352         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1353         while (cp1 > so_dst.sa.sa_data)
1354                 *--cp1 &= *--cp2;
1355 }
1356
1357 char *msgtypes[] = {
1358         "",
1359         "RTM_ADD: Add Route",
1360         "RTM_DELETE: Delete Route",
1361         "RTM_CHANGE: Change Metrics or flags",
1362         "RTM_GET: Report Metrics",
1363         "RTM_LOSING: Kernel Suspects Partitioning",
1364         "RTM_REDIRECT: Told to use different route",
1365         "RTM_MISS: Lookup failed on this address",
1366         "RTM_LOCK: fix specified metrics",
1367         "RTM_OLDADD: caused by SIOCADDRT",
1368         "RTM_OLDDEL: caused by SIOCDELRT",
1369         "RTM_RESOLVE: Route created by cloning",
1370         "RTM_NEWADDR: address being added to iface",
1371         "RTM_DELADDR: address being removed from iface",
1372         "RTM_IFINFO: iface status change",
1373         "RTM_NEWMADDR: new multicast group membership on iface",
1374         "RTM_DELMADDR: multicast group membership removed from iface",
1375         "RTM_IFANNOUNCE: interface arrival/departure",
1376         0,
1377 };
1378
1379 char metricnames[] =
1380 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1381 "\1mtu";
1382 char routeflags[] =
1383 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1384 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1385 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1386 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1387 char ifnetflags[] =
1388 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1389 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1390 "\017LINK2\020MULTICAST";
1391 char addrnames[] =
1392 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1393
1394 void
1395 print_rtmsg(rtm, msglen)
1396         register struct rt_msghdr *rtm;
1397         int msglen;
1398 {
1399         struct if_msghdr *ifm;
1400         struct ifa_msghdr *ifam;
1401 #ifdef RTM_NEWMADDR
1402         struct ifma_msghdr *ifmam;
1403 #endif
1404         struct if_announcemsghdr *ifan;
1405
1406         if (verbose == 0)
1407                 return;
1408         if (rtm->rtm_version != RTM_VERSION) {
1409                 (void) printf("routing message version %d not understood\n",
1410                     rtm->rtm_version);
1411                 return;
1412         }
1413         if (msgtypes[rtm->rtm_type] != NULL)
1414                 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1415         else
1416                 (void)printf("#%d: ", rtm->rtm_type);
1417         (void)printf("len %d, ", rtm->rtm_msglen);
1418         switch (rtm->rtm_type) {
1419         case RTM_IFINFO:
1420                 ifm = (struct if_msghdr *)rtm;
1421                 (void) printf("if# %d, flags:", ifm->ifm_index);
1422                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1423                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1424                 break;
1425         case RTM_NEWADDR:
1426         case RTM_DELADDR:
1427                 ifam = (struct ifa_msghdr *)rtm;
1428                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1429                 bprintf(stdout, ifam->ifam_flags, routeflags);
1430                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1431                 break;
1432 #ifdef RTM_NEWMADDR
1433         case RTM_NEWMADDR:
1434         case RTM_DELMADDR:
1435                 ifmam = (struct ifma_msghdr *)rtm;
1436                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1437                 break;
1438 #endif
1439         case RTM_IFANNOUNCE:
1440                 ifan = (struct if_announcemsghdr *)rtm;
1441                 (void) printf("if# %d, what: ", ifan->ifan_index);
1442                 switch (ifan->ifan_what) {
1443                 case IFAN_ARRIVAL:
1444                         printf("arrival");
1445                         break;
1446                 case IFAN_DEPARTURE:
1447                         printf("departure");
1448                         break;
1449                 default:
1450                         printf("#%d", ifan->ifan_what);
1451                         break;
1452                 }
1453                 printf("\n");
1454                 break;
1455
1456         default:
1457                 (void) printf("pid: %ld, seq %d, errno %d, flags:",
1458                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1459                 bprintf(stdout, rtm->rtm_flags, routeflags);
1460                 pmsg_common(rtm);
1461         }
1462 }
1463
1464 void
1465 print_getmsg(rtm, msglen)
1466         register struct rt_msghdr *rtm;
1467         int msglen;
1468 {
1469         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1470         struct sockaddr_dl *ifp = NULL;
1471         register struct sockaddr *sa;
1472         register char *cp;
1473         register int i;
1474
1475         (void) printf("   route to: %s\n", routename(&so_dst));
1476         if (rtm->rtm_version != RTM_VERSION) {
1477                 warnx("routing message version %d not understood",
1478                      rtm->rtm_version);
1479                 return;
1480         }
1481         if (rtm->rtm_msglen > msglen) {
1482                 warnx("message length mismatch, in packet %d, returned %d",
1483                       rtm->rtm_msglen, msglen);
1484         }
1485         if (rtm->rtm_errno)  {
1486                 errno = rtm->rtm_errno;
1487                 warn("message indicates error %d", errno);
1488                 return;
1489         }
1490         cp = ((char *)(rtm + 1));
1491         if (rtm->rtm_addrs)
1492                 for (i = 1; i; i <<= 1)
1493                         if (i & rtm->rtm_addrs) {
1494                                 sa = (struct sockaddr *)cp;
1495                                 switch (i) {
1496                                 case RTA_DST:
1497                                         dst = sa;
1498                                         break;
1499                                 case RTA_GATEWAY:
1500                                         gate = sa;
1501                                         break;
1502                                 case RTA_NETMASK:
1503                                         mask = sa;
1504                                         break;
1505                                 case RTA_IFP:
1506                                         if (sa->sa_family == AF_LINK &&
1507                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1508                                                 ifp = (struct sockaddr_dl *)sa;
1509                                         break;
1510                                 }
1511                                 ADVANCE(cp, sa);
1512                         }
1513         if (dst && mask)
1514                 mask->sa_family = dst->sa_family;       /* XXX */
1515         if (dst)
1516                 (void)printf("destination: %s\n", routename(dst));
1517         if (mask) {
1518                 int savenflag = nflag;
1519
1520                 nflag = 1;
1521                 (void)printf("       mask: %s\n", routename(mask));
1522                 nflag = savenflag;
1523         }
1524         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1525                 (void)printf("    gateway: %s\n", routename(gate));
1526         if (ifp)
1527                 (void)printf("  interface: %.*s\n",
1528                     ifp->sdl_nlen, ifp->sdl_data);
1529         (void)printf("      flags: ");
1530         bprintf(stdout, rtm->rtm_flags, routeflags);
1531
1532 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1533 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1534
1535         (void) printf("\n%s\n", "\
1536  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
1537         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1538         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1539         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1540         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1541         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1542         printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1543         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1544         if (rtm->rtm_rmx.rmx_expire)
1545                 rtm->rtm_rmx.rmx_expire -= time(0);
1546         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1547 #undef lock
1548 #undef msec
1549 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1550         if (verbose)
1551                 pmsg_common(rtm);
1552         else if (rtm->rtm_addrs &~ RTA_IGN) {
1553                 (void) printf("sockaddrs: ");
1554                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1555                 putchar('\n');
1556         }
1557 #undef  RTA_IGN
1558 }
1559
1560 void
1561 pmsg_common(rtm)
1562         register struct rt_msghdr *rtm;
1563 {
1564         (void) printf("\nlocks: ");
1565         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1566         (void) printf(" inits: ");
1567         bprintf(stdout, rtm->rtm_inits, metricnames);
1568         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1569 }
1570
1571 void
1572 pmsg_addrs(cp, addrs)
1573         char    *cp;
1574         int     addrs;
1575 {
1576         register struct sockaddr *sa;
1577         int i;
1578
1579         if (addrs == 0) {
1580                 (void) putchar('\n');
1581                 return;
1582         }
1583         (void) printf("\nsockaddrs: ");
1584         bprintf(stdout, addrs, addrnames);
1585         (void) putchar('\n');
1586         for (i = 1; i; i <<= 1)
1587                 if (i & addrs) {
1588                         sa = (struct sockaddr *)cp;
1589                         (void) printf(" %s", routename(sa));
1590                         ADVANCE(cp, sa);
1591                 }
1592         (void) putchar('\n');
1593         (void) fflush(stdout);
1594 }
1595
1596 void
1597 bprintf(fp, b, s)
1598         register FILE *fp;
1599         register int b;
1600         register u_char *s;
1601 {
1602         register int i;
1603         int gotsome = 0;
1604
1605         if (b == 0)
1606                 return;
1607         while ((i = *s++) != 0) {
1608                 if (b & (1 << (i-1))) {
1609                         if (gotsome == 0)
1610                                 i = '<';
1611                         else
1612                                 i = ',';
1613                         (void) putc(i, fp);
1614                         gotsome = 1;
1615                         for (; (i = *s) > 32; s++)
1616                                 (void) putc(i, fp);
1617                 } else
1618                         while (*s > 32)
1619                                 s++;
1620         }
1621         if (gotsome)
1622                 (void) putc('>', fp);
1623 }
1624
1625 int
1626 keyword(cp)
1627         char *cp;
1628 {
1629         register struct keytab *kt = keywords;
1630
1631         while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1632                 kt++;
1633         return kt->kt_i;
1634 }
1635
1636 void
1637 sodump(su, which)
1638         register sup su;
1639         char *which;
1640 {
1641         switch (su->sa.sa_family) {
1642         case AF_LINK:
1643                 (void) printf("%s: link %s; ",
1644                     which, link_ntoa(&su->sdl));
1645                 break;
1646         case AF_INET:
1647                 (void) printf("%s: inet %s; ",
1648                     which, inet_ntoa(su->sin.sin_addr));
1649                 break;
1650         case AF_APPLETALK:
1651                 (void) printf("%s: atalk %s; ",
1652                     which, atalk_ntoa(su->sat.sat_addr));
1653                 break;
1654 #ifdef NS
1655         case AF_NS:
1656                 (void) printf("%s: xns %s; ",
1657                     which, ns_ntoa(su->sns.sns_addr));
1658                 break;
1659 #endif
1660         }
1661         (void) fflush(stdout);
1662 }
1663
1664 /* States*/
1665 #define VIRGIN  0
1666 #define GOTONE  1
1667 #define GOTTWO  2
1668 /* Inputs */
1669 #define DIGIT   (4*0)
1670 #define END     (4*1)
1671 #define DELIM   (4*2)
1672
1673 void
1674 sockaddr(addr, sa)
1675         register char *addr;
1676         register struct sockaddr *sa;
1677 {
1678         register char *cp = (char *)sa;
1679         int size = sa->sa_len;
1680         char *cplim = cp + size;
1681         register int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1682
1683         memset(cp, 0, size);
1684         cp++;
1685         do {
1686                 if ((*addr >= '0') && (*addr <= '9')) {
1687                         new = *addr - '0';
1688                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1689                         new = *addr - 'a' + 10;
1690                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1691                         new = *addr - 'A' + 10;
1692                 } else if (*addr == 0)
1693                         state |= END;
1694                 else
1695                         state |= DELIM;
1696                 addr++;
1697                 switch (state /* | INPUT */) {
1698                 case GOTTWO | DIGIT:
1699                         *cp++ = byte; /*FALLTHROUGH*/
1700                 case VIRGIN | DIGIT:
1701                         state = GOTONE; byte = new; continue;
1702                 case GOTONE | DIGIT:
1703                         state = GOTTWO; byte = new + (byte << 4); continue;
1704                 default: /* | DELIM */
1705                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1706                 case GOTONE | END:
1707                 case GOTTWO | END:
1708                         *cp++ = byte; /* FALLTHROUGH */
1709                 case VIRGIN | END:
1710                         break;
1711                 }
1712                 break;
1713         } while (cp < cplim);
1714         sa->sa_len = cp - (char *)sa;
1715 }
1716
1717 int
1718 atalk_aton(const char *text, struct at_addr *addr)
1719 {
1720         u_int net, node;
1721
1722         if (sscanf(text, "%u.%u", &net, &node) != 2
1723             || net > 0xffff || node > 0xff)
1724                 return(0);
1725         addr->s_net = htons(net);
1726         addr->s_node = node;
1727         return(1);
1728 }
1729
1730 char *
1731 atalk_ntoa(struct at_addr at)
1732 {
1733         static char buf[20];
1734
1735         (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1736         return(buf);
1737 }