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 1.2 2003/06/17 04:27:34 dillon 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(cp)
 118         const char *cp;
 119 {
 120         if (cp)
 121                 warnx("bad keyword: %s", cp);
 122         (void) fprintf(stderr,
 123             "usage: route [-dnqtv] command [[modifiers] args]\n");
 124         exit(EX_USAGE);
 125         /* NOTREACHED */
 126 }
 127
 128 #define ROUNDUP(a) \
 129         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 130 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 131
 132 int
 133 main(argc, argv)
 134         int argc;
 135         char **argv;
 136 {
 137         int ch;
 138
 139         if (argc < 2)
 140                 usage((char *)NULL);
 141
 142         while ((ch = getopt(argc, argv, "nqdtv")) != -1)
 143                 switch(ch) {
 144                 case 'n':
 145                         nflag = 1;
 146                         break;
 147                 case 'q':
 148                         qflag = 1;
 149                         break;
 150                 case 'v':
 151                         verbose = 1;
 152                         break;
 153                 case 't':
 154                         tflag = 1;
 155                         break;
 156                 case 'd':
 157                         debugonly = 1;
 158                         break;
 159                 case '?':
 160                 default:
 161                         usage((char *)NULL);
 162                 }
 163         argc -= optind;
 164         argv += optind;
 165
 166         pid = getpid();
 167         uid = geteuid();
 168         if (tflag)
 169                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 170         else
 171                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 172         if (s < 0)
 173                 err(EX_OSERR, "socket");
 174         if (*argv)
 175                 switch (keyword(*argv)) {
 176                 case K_GET:
 177                         uid = 0;
 178                         /* FALLTHROUGH */
 179
 180                 case K_CHANGE:
 181                 case K_ADD:
 182                 case K_DELETE:
 183                         newroute(argc, argv);
 184                         /* NOTREACHED */
 185
 186                 case K_MONITOR:
 187                         monitor();
 188                         /* NOTREACHED */
 189
 190                 case K_FLUSH:
 191                         flushroutes(argc, argv);
 192                         exit(0);
 193                         /* NOTREACHED */
 194                 }
 195         usage(*argv);
 196         /* NOTREACHED */
 197 }
 198
 199 /*
 200  * Purge all entries in the routing tables not
 201  * associated with network interfaces.
 202  */
 203 void
 204 flushroutes(argc, argv)
 205         int argc;
 206         char *argv[];
 207 {
 208         size_t needed;
 209         int mib[6], rlen, seqno;
 210         char *buf, *next, *lim;
 211         register struct rt_msghdr *rtm;
 212
 213         if (uid) {
 214                 errx(EX_NOPERM, "must be root to alter routing table");
 215         }
 216         shutdown(s, 0); /* Don't want to read back our messages */
 217         if (argc > 1) {
 218                 argv++;
 219                 if (argc == 2 && **argv == '-')
 220                     switch (keyword(*argv + 1)) {
 221                         case K_INET:
 222                                 af = AF_INET;
 223                                 break;
 224 #ifdef INET6
 225                         case K_INET6:
 226                                 af = AF_INET6;
 227                                 break;
 228 #endif
 229                         case K_ATALK:
 230                                 af = AF_APPLETALK;
 231                                 break;
 232 #ifdef NS
 233                         case K_XNS:
 234                                 af = AF_NS;
 235                                 break;
 236 #endif
 237                         case K_LINK:
 238                                 af = AF_LINK;
 239                                 break;
 240                         default:
 241                                 goto bad;
 242                 } else
 243 bad:                    usage(*argv);
 244         }
 245         mib[0] = CTL_NET;
 246         mib[1] = PF_ROUTE;
 247         mib[2] = 0;             /* protocol */
 248         mib[3] = 0;             /* wildcard address family */
 249         mib[4] = NET_RT_DUMP;
 250         mib[5] = 0;             /* no flags */
 251         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 252                 err(EX_OSERR, "route-sysctl-estimate");
 253         if ((buf = malloc(needed)) == NULL)
 254                 errx(EX_OSERR, "malloc failed");
 255         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 256                 err(EX_OSERR, "route-sysctl-get");
 257         lim = buf + needed;
 258         if (verbose)
 259                 (void) printf("Examining routing table from sysctl\n");
 260         seqno = 0;              /* ??? */
 261         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 262                 rtm = (struct rt_msghdr *)next;
 263                 if (verbose)
 264                         print_rtmsg(rtm, rtm->rtm_msglen);
 265                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 266                         continue;
 267                 if (af) {
 268                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 269
 270                         if (sa->sa_family != af)
 271                                 continue;
 272                 }
 273                 if (debugonly)
 274                         continue;
 275                 rtm->rtm_type = RTM_DELETE;
 276                 rtm->rtm_seq = seqno;
 277                 rlen = write(s, next, rtm->rtm_msglen);
 278                 if (rlen < (int)rtm->rtm_msglen) {
 279                         warn("write to routing socket");
 280                         (void) printf("got only %d for rlen\n", rlen);
 281                         break;
 282                 }
 283                 seqno++;
 284                 if (qflag)
 285                         continue;
 286                 if (verbose)
 287                         print_rtmsg(rtm, rlen);
 288                 else {
 289                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 290                         (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 291                             routename(sa) : netname(sa));
 292                         sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
 293                         (void) printf("%-20.20s ", routename(sa));
 294                         (void) printf("done\n");
 295                 }
 296         }
 297 }
 298
 299 const char *
 300 routename(sa)
 301         struct sockaddr *sa;
 302 {
 303         register char *cp;
 304         static char line[MAXHOSTNAMELEN + 1];
 305         struct hostent *hp;
 306         static char domain[MAXHOSTNAMELEN + 1];
 307         static int first = 1;
 308 #ifdef NS
 309         char *ns_print();
 310 #endif
 311
 312         if (first) {
 313                 first = 0;
 314                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 315                     (cp = strchr(domain, '.'))) {
 316                         domain[MAXHOSTNAMELEN] = '\0';
 317                         (void) strcpy(domain, cp + 1);
 318                 } else
 319                         domain[0] = 0;
 320         }
 321
 322         if (sa->sa_len == 0)
 323                 strcpy(line, "default");
 324         else switch (sa->sa_family) {
 325
 326         case AF_INET:
 327             {   struct in_addr in;
 328                 in = ((struct sockaddr_in *)sa)->sin_addr;
 329
 330                 cp = 0;
 331                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 332                         cp = "default";
 333                 if (cp == 0 && !nflag) {
 334                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 335                                 AF_INET);
 336                         if (hp) {
 337                                 if ((cp = strchr(hp->h_name, '.')) &&
 338                                     !strcmp(cp + 1, domain))
 339                                         *cp = 0;
 340                                 cp = hp->h_name;
 341                         }
 342                 }
 343                 if (cp) {
 344                         strncpy(line, cp, sizeof(line) - 1);
 345                         line[sizeof(line) - 1] = '\0';
 346                 } else
 347                         (void) sprintf(line, "%s", inet_ntoa(in));
 348                 break;
 349             }
 350
 351 #ifdef INET6
 352         case AF_INET6:
 353         {
 354                 struct sockaddr_in6 sin6; /* use static var for safety */
 355                 int niflags = 0;
 356 #ifdef NI_WITHSCOPEID
 357                 niflags = NI_WITHSCOPEID;
 358 #endif
 359
 360                 memset(&sin6, 0, sizeof(sin6));
 361                 memcpy(&sin6, sa, sa->sa_len);
 362                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 363                 sin6.sin6_family = AF_INET6;
 364 #ifdef __KAME__
 365                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 366                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 367                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 368                     sin6.sin6_scope_id == 0) {
 369                         sin6.sin6_scope_id =
 370                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 371                         sin6.sin6_addr.s6_addr[2] = 0;
 372                         sin6.sin6_addr.s6_addr[3] = 0;
 373                 }
 374 #endif
 375                 if (nflag)
 376                         niflags |= NI_NUMERICHOST;
 377                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 378                     line, sizeof(line), NULL, 0, niflags) != 0)
 379                         strncpy(line, "invalid", sizeof(line));
 380
 381                 return(line);
 382         }
 383 #endif
 384
 385         case AF_APPLETALK:
 386                 (void) snprintf(line, sizeof(line), "atalk %s",
 387                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 388                 break;
 389
 390 #ifdef NS
 391         case AF_NS:
 392                 return (ns_print((struct sockaddr_ns *)sa));
 393 #endif
 394
 395         case AF_LINK:
 396                 return (link_ntoa((struct sockaddr_dl *)sa));
 397
 398         default:
 399             {   u_short *s = (u_short *)sa;
 400                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 401                 char *cp = line + sprintf(line, "(%d)", sa->sa_family);
 402                 char *cpe = line + sizeof(line);
 403
 404                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 405                         cp += snprintf(cp, cpe - cp, " %x", *s);
 406                 break;
 407             }
 408         }
 409         return (line);
 410 }
 411
 412 /*
 413  * Return the name of the network whose address is given.
 414  * The address is assumed to be that of a net or subnet, not a host.
 415  */
 416 const char *
 417 netname(sa)
 418         struct sockaddr *sa;
 419 {
 420         char *cp = 0;
 421         static char line[MAXHOSTNAMELEN + 1];
 422         struct netent *np = 0;
 423         u_long net, mask;
 424         register u_long i;
 425         int subnetshift;
 426 #ifdef NS
 427         char *ns_print();
 428 #endif
 429
 430         switch (sa->sa_family) {
 431
 432         case AF_INET:
 433             {   struct in_addr in;
 434                 in = ((struct sockaddr_in *)sa)->sin_addr;
 435
 436                 i = in.s_addr = ntohl(in.s_addr);
 437                 if (in.s_addr == 0)
 438                         cp = "default";
 439                 else if (!nflag) {
 440                         if (IN_CLASSA(i)) {
 441                                 mask = IN_CLASSA_NET;
 442                                 subnetshift = 8;
 443                         } else if (IN_CLASSB(i)) {
 444                                 mask = IN_CLASSB_NET;
 445                                 subnetshift = 8;
 446                         } else {
 447                                 mask = IN_CLASSC_NET;
 448                                 subnetshift = 4;
 449                         }
 450                         /*
 451                          * If there are more bits than the standard mask
 452                          * would suggest, subnets must be in use.
 453                          * Guess at the subnet mask, assuming reasonable
 454                          * width subnet fields.
 455                          */
 456                         while (in.s_addr &~ mask)
 457                                 mask = (long)mask >> subnetshift;
 458                         net = in.s_addr & mask;
 459                         while ((mask & 1) == 0)
 460                                 mask >>= 1, net >>= 1;
 461                         np = getnetbyaddr(net, AF_INET);
 462                         if (np)
 463                                 cp = np->n_name;
 464                 }
 465 #define C(x)    (unsigned)((x) & 0xff)
 466                 if (cp)
 467                         strncpy(line, cp, sizeof(line));
 468                 else if ((in.s_addr & 0xffffff) == 0)
 469                         (void) sprintf(line, "%u", C(in.s_addr >> 24));
 470                 else if ((in.s_addr & 0xffff) == 0)
 471                         (void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
 472                             C(in.s_addr >> 16));
 473                 else if ((in.s_addr & 0xff) == 0)
 474                         (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 475                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 476                 else
 477                         (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 478                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 479                             C(in.s_addr));
 480 #undef C
 481                 break;
 482             }
 483
 484 #ifdef INET6
 485         case AF_INET6:
 486         {
 487                 struct sockaddr_in6 sin6; /* use static var for safety */
 488                 int niflags = 0;
 489 #ifdef NI_WITHSCOPEID
 490                 niflags = NI_WITHSCOPEID;
 491 #endif
 492
 493                 memset(&sin6, 0, sizeof(sin6));
 494                 memcpy(&sin6, sa, sa->sa_len);
 495                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 496                 sin6.sin6_family = AF_INET6;
 497 #ifdef __KAME__
 498                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 499                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 500                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 501                     sin6.sin6_scope_id == 0) {
 502                         sin6.sin6_scope_id =
 503                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 504                         sin6.sin6_addr.s6_addr[2] = 0;
 505                         sin6.sin6_addr.s6_addr[3] = 0;
 506                 }
 507 #endif
 508                 if (nflag)
 509                         niflags |= NI_NUMERICHOST;
 510                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 511                     line, sizeof(line), NULL, 0, niflags) != 0)
 512                         strncpy(line, "invalid", sizeof(line));
 513
 514                 return(line);
 515         }
 516 #endif
 517
 518         case AF_APPLETALK:
 519                 (void) snprintf(line, sizeof(line), "atalk %s",
 520                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 521                 break;
 522
 523 #ifdef NS
 524         case AF_NS:
 525                 return (ns_print((struct sockaddr_ns *)sa));
 526                 break;
 527 #endif
 528
 529         case AF_LINK:
 530                 return (link_ntoa((struct sockaddr_dl *)sa));
 531
 532
 533         default:
 534             {   u_short *s = (u_short *)sa->sa_data;
 535                 u_short *slim = s + ((sa->sa_len + 1)>>1);
 536                 char *cp = line + sprintf(line, "af %d:", sa->sa_family);
 537                 char *cpe = line + sizeof(line);
 538
 539                 while (s < slim && cp < cpe)
 540                         cp += snprintf(cp, cpe - cp, " %x", *s++);
 541                 break;
 542             }
 543         }
 544         return (line);
 545 }
 546
 547 void
 548 set_metric(value, key)
 549         char *value;
 550         int key;
 551 {
 552         int flag = 0;
 553         u_long noval, *valp = &noval;
 554
 555         switch (key) {
 556 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 557         caseof(K_MTU, RTV_MTU, rmx_mtu);
 558         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 559         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 560         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 561         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 562         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 563         caseof(K_RTT, RTV_RTT, rmx_rtt);
 564         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 565         }
 566         rtm_inits |= flag;
 567         if (lockrest || locking)
 568                 rt_metrics.rmx_locks |= flag;
 569         if (locking)
 570                 locking = 0;
 571         *valp = atoi(value);
 572 }
 573
 574 void
 575 newroute(argc, argv)
 576         int argc;
 577         register char **argv;
 578 {
 579         char *cmd, *dest = "", *gateway = "", *err;
 580         int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 581         int key;
 582         struct hostent *hp = 0;
 583
 584         if (uid) {
 585                 errx(EX_NOPERM, "must be root to alter routing table");
 586         }
 587         cmd = argv[0];
 588         if (*cmd != 'g')
 589                 shutdown(s, 0); /* Don't want to read back our messages */
 590         while (--argc > 0) {
 591                 if (**(++argv)== '-') {
 592                         switch (key = keyword(1 + *argv)) {
 593                         case K_LINK:
 594                                 af = AF_LINK;
 595                                 aflen = sizeof(struct sockaddr_dl);
 596                                 break;
 597                         case K_INET:
 598                                 af = AF_INET;
 599                                 aflen = sizeof(struct sockaddr_in);
 600                                 break;
 601 #ifdef INET6
 602                         case K_INET6:
 603                                 af = AF_INET6;
 604                                 aflen = sizeof(struct sockaddr_in6);
 605                                 break;
 606 #endif
 607                         case K_ATALK:
 608                                 af = AF_APPLETALK;
 609                                 aflen = sizeof(struct sockaddr_at);
 610                                 break;
 611                         case K_SA:
 612                                 af = PF_ROUTE;
 613                                 aflen = sizeof(union sockunion);
 614                                 break;
 615 #ifdef NS
 616                         case K_XNS:
 617                                 af = AF_NS;
 618                                 aflen = sizeof(struct sockaddr_ns);
 619                                 break;
 620 #endif
 621                         case K_IFACE:
 622                         case K_INTERFACE:
 623                                 iflag++;
 624                                 break;
 625                         case K_NOSTATIC:
 626                                 flags &= ~RTF_STATIC;
 627                                 break;
 628                         case K_LLINFO:
 629                                 flags |= RTF_LLINFO;
 630                                 break;
 631                         case K_LOCK:
 632                                 locking = 1;
 633                                 break;
 634                         case K_LOCKREST:
 635                                 lockrest = 1;
 636                                 break;
 637                         case K_HOST:
 638                                 forcehost++;
 639                                 break;
 640                         case K_REJECT:
 641                                 flags |= RTF_REJECT;
 642                                 break;
 643                         case K_BLACKHOLE:
 644                                 flags |= RTF_BLACKHOLE;
 645                                 break;
 646                         case K_PROTO1:
 647                                 flags |= RTF_PROTO1;
 648                                 break;
 649                         case K_PROTO2:
 650                                 flags |= RTF_PROTO2;
 651                                 break;
 652                         case K_PROXY:
 653                                 proxy = 1;
 654                                 break;
 655                         case K_CLONING:
 656                                 flags |= RTF_CLONING;
 657                                 break;
 658                         case K_XRESOLVE:
 659                                 flags |= RTF_XRESOLVE;
 660                                 break;
 661                         case K_STATIC:
 662                                 flags |= RTF_STATIC;
 663                                 break;
 664                         case K_IFA:
 665                                 if (!--argc)
 666                                         usage((char *)NULL);
 667                                 (void) getaddr(RTA_IFA, *++argv, 0);
 668                                 break;
 669                         case K_IFP:
 670                                 if (!--argc)
 671                                         usage((char *)NULL);
 672                                 (void) getaddr(RTA_IFP, *++argv, 0);
 673                                 break;
 674                         case K_GENMASK:
 675                                 if (!--argc)
 676                                         usage((char *)NULL);
 677                                 (void) getaddr(RTA_GENMASK, *++argv, 0);
 678                                 break;
 679                         case K_GATEWAY:
 680                                 if (!--argc)
 681                                         usage((char *)NULL);
 682                                 (void) getaddr(RTA_GATEWAY, *++argv, 0);
 683                                 break;
 684                         case K_DST:
 685                                 if (!--argc)
 686                                         usage((char *)NULL);
 687                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 688                                 dest = *argv;
 689                                 break;
 690                         case K_NETMASK:
 691                                 if (!--argc)
 692                                         usage((char *)NULL);
 693                                 (void) getaddr(RTA_NETMASK, *++argv, 0);
 694                                 /* FALLTHROUGH */
 695                         case K_NET:
 696                                 forcenet++;
 697                                 break;
 698                         case K_PREFIXLEN:
 699                                 if (!--argc)
 700                                         usage((char *)NULL);
 701                                 if (prefixlen(*++argv) == -1) {
 702                                         forcenet = 0;
 703                                         ishost = 1;
 704                                 } else {
 705                                         forcenet = 1;
 706                                         ishost = 0;
 707                                 }
 708                                 break;
 709                         case K_MTU:
 710                         case K_HOPCOUNT:
 711                         case K_EXPIRE:
 712                         case K_RECVPIPE:
 713                         case K_SENDPIPE:
 714                         case K_SSTHRESH:
 715                         case K_RTT:
 716                         case K_RTTVAR:
 717                                 if (!--argc)
 718                                         usage((char *)NULL);
 719                                 set_metric(*++argv, key);
 720                                 break;
 721                         default:
 722                                 usage(1+*argv);
 723                         }
 724                 } else {
 725                         if ((rtm_addrs & RTA_DST) == 0) {
 726                                 dest = *argv;
 727                                 ishost = getaddr(RTA_DST, *argv, &hp);
 728                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 729                                 gateway = *argv;
 730                                 (void) getaddr(RTA_GATEWAY, *argv, &hp);
 731                         } else {
 732                                 (void) getaddr(RTA_NETMASK, *argv, 0);
 733                                 forcenet = 1;
 734                         }
 735                 }
 736         }
 737         if (forcehost) {
 738                 ishost = 1;
 739 #ifdef INET6
 740                 if (af == AF_INET6) {
 741                         rtm_addrs &= ~RTA_NETMASK;
 742                         memset((void *)&so_mask, 0, sizeof(so_mask));
 743                 }
 744 #endif
 745         }
 746         if (forcenet)
 747                 ishost = 0;
 748         flags |= RTF_UP;
 749         if (ishost)
 750                 flags |= RTF_HOST;
 751         if (iflag == 0)
 752                 flags |= RTF_GATEWAY;
 753         if (proxy) {
 754                 so_dst.sinarp.sin_other = SIN_PROXY;
 755                 flags |= RTF_ANNOUNCE;
 756         }
 757         for (attempts = 1; ; attempts++) {
 758                 errno = 0;
 759                 if ((ret = rtmsg(*cmd, flags)) == 0)
 760                         break;
 761                 if (errno != ENETUNREACH && errno != ESRCH)
 762                         break;
 763                 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 764                         hp->h_addr_list++;
 765                         memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0],
 766                             MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
 767                 } else
 768                         break;
 769         }
 770         if (*cmd == 'g')
 771                 exit(0);
 772         if (!qflag) {
 773                 oerrno = errno;
 774                 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 775                 if (*gateway) {
 776                         (void) printf(": gateway %s", gateway);
 777                         if (attempts > 1 && ret == 0 && af == AF_INET)
 778                             (void) printf(" (%s)",
 779                                 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
 780                 }
 781                 if (ret == 0) {
 782                         (void) printf("\n");
 783                 } else {
 784                         switch (oerrno) {
 785                         case ESRCH:
 786                                 err = "not in table";
 787                                 break;
 788                         case EBUSY:
 789                                 err = "entry in use";
 790                                 break;
 791                         case ENOBUFS:
 792                                 err = "routing table overflow";
 793                                 break;
 794                         case EDQUOT: /* handle recursion avoidance in rt_setgate() */
 795                                 err = "gateway uses the same route";
 796                                 break;
 797                         default:
 798                                 err = strerror(oerrno);
 799                                 break;
 800                         }
 801                         (void) printf(": %s\n", err);
 802                 }
 803         }
 804         exit(ret != 0);
 805 }
 806
 807 void
 808 inet_makenetandmask(net, sin, bits)
 809         u_long net, bits;
 810         register struct sockaddr_in *sin;
 811 {
 812         u_long addr, mask = 0;
 813         register char *cp;
 814
 815         rtm_addrs |= RTA_NETMASK;
 816         if (net == 0)
 817                 mask = addr = 0;
 818         else if (net < 128) {
 819                 addr = net << IN_CLASSA_NSHIFT;
 820                 mask = IN_CLASSA_NET;
 821         } else if (net < 65536) {
 822                 addr = net << IN_CLASSB_NSHIFT;
 823                 mask = IN_CLASSB_NET;
 824         } else if (net < 16777216L) {
 825                 addr = net << IN_CLASSC_NSHIFT;
 826                 mask = IN_CLASSC_NET;
 827         } else {
 828                 addr = net;
 829                 if ((addr & IN_CLASSA_HOST) == 0)
 830                         mask =  IN_CLASSA_NET;
 831                 else if ((addr & IN_CLASSB_HOST) == 0)
 832                         mask =  IN_CLASSB_NET;
 833                 else if ((addr & IN_CLASSC_HOST) == 0)
 834                         mask =  IN_CLASSC_NET;
 835                 else
 836                         mask = -1;
 837         }
 838         if (bits)
 839                 mask = 0xffffffff << (32 - bits);
 840         sin->sin_addr.s_addr = htonl(addr);
 841         sin = &so_mask.sin;
 842         sin->sin_addr.s_addr = htonl(mask);
 843         sin->sin_len = 0;
 844         sin->sin_family = 0;
 845         cp = (char *)(&sin->sin_addr + 1);
 846         while (*--cp == 0 && cp > (char *)sin)
 847                 ;
 848         sin->sin_len = 1 + cp - (char *)sin;
 849 }
 850
 851 #ifdef INET6
 852 /*
 853  * XXX the function may need more improvement...
 854  */
 855 static int
 856 inet6_makenetandmask(sin6, plen)
 857         struct sockaddr_in6 *sin6;
 858         char *plen;
 859 {
 860         struct in6_addr in6;
 861
 862         if (!plen) {
 863                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 864                     sin6->sin6_scope_id == 0) {
 865                         plen = "0";
 866                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 867                         /* aggregatable global unicast - RFC2374 */
 868                         memset(&in6, 0, sizeof(in6));
 869                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
 870                                     &in6.s6_addr[8], 8))
 871                                 plen = "64";
 872                 }
 873         }
 874
 875         if (!plen || strcmp(plen, "128") == 0)
 876                 return 1;
 877         rtm_addrs |= RTA_NETMASK;
 878         (void)prefixlen(plen);
 879         return 0;
 880 }
 881 #endif
 882
 883 /*
 884  * Interpret an argument as a network address of some kind,
 885  * returning 1 if a host address, 0 if a network address.
 886  */
 887 int
 888 getaddr(which, s, hpp)
 889         int which;
 890         char *s;
 891         struct hostent **hpp;
 892 {
 893         register sup su;
 894         struct hostent *hp;
 895         struct netent *np;
 896         u_long val;
 897         char *q;
 898         int afamily;  /* local copy of af so we can change it */
 899
 900         if (af == 0) {
 901                 af = AF_INET;
 902                 aflen = sizeof(struct sockaddr_in);
 903         }
 904         afamily = af;
 905         rtm_addrs |= which;
 906         switch (which) {
 907         case RTA_DST:
 908                 su = &so_dst;
 909                 break;
 910         case RTA_GATEWAY:
 911                 su = &so_gate;
 912                 if (iflag) {
 913                         struct ifaddrs *ifap, *ifa;
 914                         struct sockaddr_dl *sdl = NULL;
 915
 916                         if (getifaddrs(&ifap))
 917                                 err(1, "getifaddrs");
 918
 919                         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 920                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 921                                         continue;
 922
 923                                 if (strcmp(s, ifa->ifa_name))
 924                                         continue;
 925
 926                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 927                         }
 928                         /* If we found it, then use it */
 929                         if (sdl) {
 930                                 /*
 931                                  * Copy is safe since we have a
 932                                  * sockaddr_storage member in sockunion{}.
 933                                  * Note that we need to copy before calling
 934                                  * freeifaddrs().
 935                                  */
 936                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 937                         }
 938                         freeifaddrs(ifap);
 939                         if (sdl)
 940                                 return(1);
 941                 }
 942                 break;
 943         case RTA_NETMASK:
 944                 su = &so_mask;
 945                 break;
 946         case RTA_GENMASK:
 947                 su = &so_genmask;
 948                 break;
 949         case RTA_IFP:
 950                 su = &so_ifp;
 951                 afamily = AF_LINK;
 952                 break;
 953         case RTA_IFA:
 954                 su = &so_ifa;
 955                 break;
 956         default:
 957                 usage("internal error");
 958                 /*NOTREACHED*/
 959         }
 960         su->sa.sa_len = aflen;
 961         su->sa.sa_family = afamily; /* cases that don't want it have left already */
 962         if (strcmp(s, "default") == 0) {
 963                 /*
 964                  * Default is net 0.0.0.0/0
 965                  */
 966                 switch (which) {
 967                 case RTA_DST:
 968                         forcenet++;
 969                         /* bzero(su, sizeof(*su)); *//* for readability */
 970                         (void) getaddr(RTA_NETMASK, s, 0);
 971                         break;
 972                 case RTA_NETMASK:
 973                 case RTA_GENMASK:
 974                         /* bzero(su, sizeof(*su)); *//* for readability */
 975                 }
 976                 return (0);
 977         }
 978         switch (afamily) {
 979 #ifdef INET6
 980         case AF_INET6:
 981         {
 982                 struct addrinfo hints, *res;
 983
 984                 q = NULL;
 985                 if (which == RTA_DST && (q = strchr(s, '/')) != NULL)
 986                         *q = '\0';
 987                 memset(&hints, 0, sizeof(hints));
 988                 hints.ai_family = afamily;      /*AF_INET6*/
 989                 hints.ai_flags = AI_NUMERICHOST;
 990                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
 991                 if (getaddrinfo(s, "0", &hints, &res) != 0 ||
 992                     res->ai_family != AF_INET6 ||
 993                     res->ai_addrlen != sizeof(su->sin6)) {
 994                         (void) fprintf(stderr, "%s: bad value\n", s);
 995                         exit(1);
 996                 }
 997                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
 998 #ifdef __KAME__
 999                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
1000                      IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) &&
1001                     su->sin6.sin6_scope_id) {
1002                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1003                                 htons(su->sin6.sin6_scope_id);
1004                         su->sin6.sin6_scope_id = 0;
1005                 }
1006 #endif
1007                 freeaddrinfo(res);
1008                 if (q != NULL)
1009                         *q++ = '/';
1010                 if (which == RTA_DST)
1011                         return (inet6_makenetandmask(&su->sin6, q));
1012                 return (0);
1013         }
1014 #endif /* INET6 */
1015
1016 #ifdef NS
1017         case AF_NS:
1018                 if (which == RTA_DST) {
1019                         extern short ns_bh[3];
1020                         struct sockaddr_ns *sms = &(so_mask.sns);
1021                         memset(sms, 0, sizeof(*sms));
1022                         sms->sns_family = 0;
1023                         sms->sns_len = 6;
1024                         sms->sns_addr.x_net = *(union ns_net *)ns_bh;
1025                         rtm_addrs |= RTA_NETMASK;
1026                 }
1027                 su->sns.sns_addr = ns_addr(s);
1028                 return (!ns_nullhost(su->sns.sns_addr));
1029 #endif
1030
1031
1032         case AF_APPLETALK:
1033                 if (!atalk_aton(s, &su->sat.sat_addr))
1034                         errx(EX_NOHOST, "bad address: %s", s);
1035                 rtm_addrs |= RTA_NETMASK;
1036                 return(forcehost || su->sat.sat_addr.s_node != 0);
1037
1038         case AF_LINK:
1039                 link_addr(s, &su->sdl);
1040                 return (1);
1041
1042
1043         case PF_ROUTE:
1044                 su->sa.sa_len = sizeof(*su);
1045                 sockaddr(s, &su->sa);
1046                 return (1);
1047
1048         case AF_INET:
1049         default:
1050                 break;
1051         }
1052
1053         if (hpp == NULL)
1054                 hpp = &hp;
1055         *hpp = NULL;
1056
1057         q = strchr(s,'/');
1058         if (q && which == RTA_DST) {
1059                 *q = '\0';
1060                 if ((val = inet_network(s)) != INADDR_NONE) {
1061                         inet_makenetandmask(
1062                                 val, &su->sin, strtoul(q+1, 0, 0));
1063                         return (0);
1064                 }
1065                 *q = '/';
1066         }
1067         if ((which != RTA_DST || forcenet == 0) &&
1068             inet_aton(s, &su->sin.sin_addr)) {
1069                 val = su->sin.sin_addr.s_addr;
1070                 if (which != RTA_DST ||
1071                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1072                         return (1);
1073                 else {
1074                         val = ntohl(val);
1075                         goto netdone;
1076                 }
1077         }
1078         if (which == RTA_DST && forcehost == 0 &&
1079             ((val = inet_network(s)) != INADDR_NONE ||
1080             ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
1081 netdone:
1082                 inet_makenetandmask(val, &su->sin, 0);
1083                 return (0);
1084         }
1085         hp = gethostbyname(s);
1086         if (hp) {
1087                 *hpp = hp;
1088                 su->sin.sin_family = hp->h_addrtype;
1089                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1090                     MIN(hp->h_length, sizeof(su->sin.sin_addr)));
1091                 return (1);
1092         }
1093         errx(EX_NOHOST, "bad address: %s", s);
1094 }
1095
1096 int
1097 prefixlen(s)
1098         char *s;
1099 {
1100         int len = atoi(s), q, r;
1101         int max;
1102         char *p;
1103
1104         rtm_addrs |= RTA_NETMASK;
1105         switch (af) {
1106 #ifdef INET6
1107         case AF_INET6:
1108                 max = 128;
1109                 p = (char *)&so_mask.sin6.sin6_addr;
1110                 break;
1111 #endif
1112         case AF_INET:
1113                 max = 32;
1114                 p = (char *)&so_mask.sin.sin_addr;
1115                 break;
1116         default:
1117                 (void) fprintf(stderr, "prefixlen not supported in this af\n");
1118                 exit(1);
1119                 /*NOTREACHED*/
1120         }
1121
1122         if (len < 0 || max < len) {
1123                 (void) fprintf(stderr, "%s: bad value\n", s);
1124                 exit(1);
1125         }
1126
1127         q = len >> 3;
1128         r = len & 7;
1129         so_mask.sa.sa_family = af;
1130         so_mask.sa.sa_len = aflen;
1131         memset((void *)p, 0, max / 8);
1132         if (q > 0)
1133                 memset((void *)p, 0xff, q);
1134         if (r > 0)
1135                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1136         if (len == max)
1137                 return -1;
1138         else
1139                 return len;
1140 }
1141
1142 #ifdef NS
1143 short ns_nullh[] = {0,0,0};
1144 short ns_bh[] = {-1,-1,-1};
1145
1146 char *
1147 ns_print(sns)
1148         struct sockaddr_ns *sns;
1149 {
1150         struct ns_addr work;
1151         union { union ns_net net_e; u_long long_e; } net;
1152         u_short port;
1153         static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25];
1154         char *host = "";
1155         register char *p;
1156         register u_char *q;
1157
1158         work = sns->sns_addr;
1159         port = ntohs(work.x_port);
1160         work.x_port = 0;
1161         net.net_e  = work.x_net;
1162         if (ns_nullhost(work) && net.long_e == 0) {
1163                 if (!port)
1164                         return ("*.*");
1165                 (void) sprintf(mybuf, "*.%XH", port);
1166                 return (mybuf);
1167         }
1168
1169         if (memcmp(ns_bh, work.x_host.c_host, 6) == 0)
1170                 host = "any";
1171         else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0)
1172                 host = "*";
1173         else {
1174                 q = work.x_host.c_host;
1175                 (void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH",
1176                         q[0], q[1], q[2], q[3], q[4], q[5]);
1177                 for (p = chost; *p == '0' && p < chost + 12; p++)
1178                         /* void */;
1179                 host = p;
1180         }
1181         if (port)
1182                 (void) sprintf(cport, ".%XH", htons(port));
1183         else
1184                 *cport = 0;
1185
1186         (void) snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s",
1187                         (unsigned long)ntohl(net.long_e),
1188                         host, cport);
1189         return (mybuf);
1190 }
1191 #endif
1192
1193 void
1194 interfaces()
1195 {
1196         size_t needed;
1197         int mib[6];
1198         char *buf, *lim, *next;
1199         register struct rt_msghdr *rtm;
1200
1201         mib[0] = CTL_NET;
1202         mib[1] = PF_ROUTE;
1203         mib[2] = 0;             /* protocol */
1204         mib[3] = 0;             /* wildcard address family */
1205         mib[4] = NET_RT_IFLIST;
1206         mib[5] = 0;             /* no flags */
1207         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1208                 err(EX_OSERR, "route-sysctl-estimate");
1209         if ((buf = malloc(needed)) == NULL)
1210                 errx(EX_OSERR, "malloc failed");
1211         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1212                 err(EX_OSERR, "actual retrieval of interface table");
1213         lim = buf + needed;
1214         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1215                 rtm = (struct rt_msghdr *)next;
1216                 print_rtmsg(rtm, rtm->rtm_msglen);
1217         }
1218 }
1219
1220 void
1221 monitor()
1222 {
1223         int n;
1224         char msg[2048];
1225
1226         verbose = 1;
1227         if (debugonly) {
1228                 interfaces();
1229                 exit(0);
1230         }
1231         for(;;) {
1232                 time_t now;
1233                 n = read(s, msg, 2048);
1234                 now = time(NULL);
1235                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1236                 print_rtmsg((struct rt_msghdr *)msg, n);
1237         }
1238 }
1239
1240 struct {
1241         struct  rt_msghdr m_rtm;
1242         char    m_space[512];
1243 } m_rtmsg;
1244
1245 int
1246 rtmsg(cmd, flags)
1247         int cmd, flags;
1248 {
1249         static int seq;
1250         int rlen;
1251         register char *cp = m_rtmsg.m_space;
1252         register int l;
1253
1254 #define NEXTADDR(w, u) \
1255         if (rtm_addrs & (w)) {\
1256             l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\
1257             if (verbose) sodump(&(u),"u");\
1258         }
1259
1260         errno = 0;
1261         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1262         if (cmd == 'a')
1263                 cmd = RTM_ADD;
1264         else if (cmd == 'c')
1265                 cmd = RTM_CHANGE;
1266         else if (cmd == 'g') {
1267                 cmd = RTM_GET;
1268                 if (so_ifp.sa.sa_family == 0) {
1269                         so_ifp.sa.sa_family = AF_LINK;
1270                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1271                         rtm_addrs |= RTA_IFP;
1272                 }
1273         } else
1274                 cmd = RTM_DELETE;
1275 #define rtm m_rtmsg.m_rtm
1276         rtm.rtm_type = cmd;
1277         rtm.rtm_flags = flags;
1278         rtm.rtm_version = RTM_VERSION;
1279         rtm.rtm_seq = ++seq;
1280         rtm.rtm_addrs = rtm_addrs;
1281         rtm.rtm_rmx = rt_metrics;
1282         rtm.rtm_inits = rtm_inits;
1283
1284         if (rtm_addrs & RTA_NETMASK)
1285                 mask_addr();
1286         NEXTADDR(RTA_DST, so_dst);
1287         NEXTADDR(RTA_GATEWAY, so_gate);
1288         NEXTADDR(RTA_NETMASK, so_mask);
1289         NEXTADDR(RTA_GENMASK, so_genmask);
1290         NEXTADDR(RTA_IFP, so_ifp);
1291         NEXTADDR(RTA_IFA, so_ifa);
1292         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1293         if (verbose)
1294                 print_rtmsg(&rtm, l);
1295         if (debugonly)
1296                 return (0);
1297         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1298                 warn("writing to routing socket");
1299                 return (-1);
1300         }
1301         if (cmd == RTM_GET) {
1302                 do {
1303                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1304                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1305                 if (l < 0)
1306                         warn("read from routing socket");
1307                 else
1308                         print_getmsg(&rtm, l);
1309         }
1310 #undef rtm
1311         return (0);
1312 }
1313
1314 void
1315 mask_addr()
1316 {
1317         int olen = so_mask.sa.sa_len;
1318         register char *cp1 = olen + (char *)&so_mask, *cp2;
1319
1320         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1321                 if (*--cp1 != 0) {
1322                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1323                         break;
1324                 }
1325         if ((rtm_addrs & RTA_DST) == 0)
1326                 return;
1327         switch (so_dst.sa.sa_family) {
1328 #ifdef NS
1329         case AF_NS:
1330 #endif
1331         case AF_INET:
1332 #ifdef INET6
1333         case AF_INET6:
1334 #endif
1335         case AF_APPLETALK:
1336         case 0:
1337                 return;
1338         }
1339         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1340         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1341         while (cp2 > cp1)
1342                 *--cp2 = 0;
1343         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1344         while (cp1 > so_dst.sa.sa_data)
1345                 *--cp1 &= *--cp2;
1346 }
1347
1348 char *msgtypes[] = {
1349         "",
1350         "RTM_ADD: Add Route",
1351         "RTM_DELETE: Delete Route",
1352         "RTM_CHANGE: Change Metrics or flags",
1353         "RTM_GET: Report Metrics",
1354         "RTM_LOSING: Kernel Suspects Partitioning",
1355         "RTM_REDIRECT: Told to use different route",
1356         "RTM_MISS: Lookup failed on this address",
1357         "RTM_LOCK: fix specified metrics",
1358         "RTM_OLDADD: caused by SIOCADDRT",
1359         "RTM_OLDDEL: caused by SIOCDELRT",
1360         "RTM_RESOLVE: Route created by cloning",
1361         "RTM_NEWADDR: address being added to iface",
1362         "RTM_DELADDR: address being removed from iface",
1363         "RTM_IFINFO: iface status change",
1364         "RTM_NEWMADDR: new multicast group membership on iface",
1365         "RTM_DELMADDR: multicast group membership removed from iface",
1366         "RTM_IFANNOUNCE: interface arrival/departure",
1367         0,
1368 };
1369
1370 char metricnames[] =
1371 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1372 "\1mtu";
1373 char routeflags[] =
1374 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1375 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1376 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1377 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1378 char ifnetflags[] =
1379 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1380 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1381 "\017LINK2\020MULTICAST";
1382 char addrnames[] =
1383 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1384
1385 void
1386 print_rtmsg(rtm, msglen)
1387         register struct rt_msghdr *rtm;
1388         int msglen;
1389 {
1390         struct if_msghdr *ifm;
1391         struct ifa_msghdr *ifam;
1392 #ifdef RTM_NEWMADDR
1393         struct ifma_msghdr *ifmam;
1394 #endif
1395         struct if_announcemsghdr *ifan;
1396
1397         if (verbose == 0)
1398                 return;
1399         if (rtm->rtm_version != RTM_VERSION) {
1400                 (void) printf("routing message version %d not understood\n",
1401                     rtm->rtm_version);
1402                 return;
1403         }
1404         if (msgtypes[rtm->rtm_type] != NULL)
1405                 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1406         else
1407                 (void)printf("#%d: ", rtm->rtm_type);
1408         (void)printf("len %d, ", rtm->rtm_msglen);
1409         switch (rtm->rtm_type) {
1410         case RTM_IFINFO:
1411                 ifm = (struct if_msghdr *)rtm;
1412                 (void) printf("if# %d, flags:", ifm->ifm_index);
1413                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1414                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1415                 break;
1416         case RTM_NEWADDR:
1417         case RTM_DELADDR:
1418                 ifam = (struct ifa_msghdr *)rtm;
1419                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1420                 bprintf(stdout, ifam->ifam_flags, routeflags);
1421                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1422                 break;
1423 #ifdef RTM_NEWMADDR
1424         case RTM_NEWMADDR:
1425         case RTM_DELMADDR:
1426                 ifmam = (struct ifma_msghdr *)rtm;
1427                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1428                 break;
1429 #endif
1430         case RTM_IFANNOUNCE:
1431                 ifan = (struct if_announcemsghdr *)rtm;
1432                 (void) printf("if# %d, what: ", ifan->ifan_index);
1433                 switch (ifan->ifan_what) {
1434                 case IFAN_ARRIVAL:
1435                         printf("arrival");
1436                         break;
1437                 case IFAN_DEPARTURE:
1438                         printf("departure");
1439                         break;
1440                 default:
1441                         printf("#%d", ifan->ifan_what);
1442                         break;
1443                 }
1444                 printf("\n");
1445                 break;
1446
1447         default:
1448                 (void) printf("pid: %ld, seq %d, errno %d, flags:",
1449                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1450                 bprintf(stdout, rtm->rtm_flags, routeflags);
1451                 pmsg_common(rtm);
1452         }
1453 }
1454
1455 void
1456 print_getmsg(rtm, msglen)
1457         register struct rt_msghdr *rtm;
1458         int msglen;
1459 {
1460         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1461         struct sockaddr_dl *ifp = NULL;
1462         register struct sockaddr *sa;
1463         register char *cp;
1464         register int i;
1465
1466         (void) printf("   route to: %s\n", routename(&so_dst));
1467         if (rtm->rtm_version != RTM_VERSION) {
1468                 warnx("routing message version %d not understood",
1469                      rtm->rtm_version);
1470                 return;
1471         }
1472         if (rtm->rtm_msglen > msglen) {
1473                 warnx("message length mismatch, in packet %d, returned %d",
1474                       rtm->rtm_msglen, msglen);
1475         }
1476         if (rtm->rtm_errno)  {
1477                 errno = rtm->rtm_errno;
1478                 warn("message indicates error %d", errno);
1479                 return;
1480         }
1481         cp = ((char *)(rtm + 1));
1482         if (rtm->rtm_addrs)
1483                 for (i = 1; i; i <<= 1)
1484                         if (i & rtm->rtm_addrs) {
1485                                 sa = (struct sockaddr *)cp;
1486                                 switch (i) {
1487                                 case RTA_DST:
1488                                         dst = sa;
1489                                         break;
1490                                 case RTA_GATEWAY:
1491                                         gate = sa;
1492                                         break;
1493                                 case RTA_NETMASK:
1494                                         mask = sa;
1495                                         break;
1496                                 case RTA_IFP:
1497                                         if (sa->sa_family == AF_LINK &&
1498                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1499                                                 ifp = (struct sockaddr_dl *)sa;
1500                                         break;
1501                                 }
1502                                 ADVANCE(cp, sa);
1503                         }
1504         if (dst && mask)
1505                 mask->sa_family = dst->sa_family;       /* XXX */
1506         if (dst)
1507                 (void)printf("destination: %s\n", routename(dst));
1508         if (mask) {
1509                 int savenflag = nflag;
1510
1511                 nflag = 1;
1512                 (void)printf("       mask: %s\n", routename(mask));
1513                 nflag = savenflag;
1514         }
1515         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1516                 (void)printf("    gateway: %s\n", routename(gate));
1517         if (ifp)
1518                 (void)printf("  interface: %.*s\n",
1519                     ifp->sdl_nlen, ifp->sdl_data);
1520         (void)printf("      flags: ");
1521         bprintf(stdout, rtm->rtm_flags, routeflags);
1522
1523 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1524 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1525
1526         (void) printf("\n%s\n", "\
1527  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
1528         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1529         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1530         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1531         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1532         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1533         printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1534         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1535         if (rtm->rtm_rmx.rmx_expire)
1536                 rtm->rtm_rmx.rmx_expire -= time(0);
1537         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1538 #undef lock
1539 #undef msec
1540 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1541         if (verbose)
1542                 pmsg_common(rtm);
1543         else if (rtm->rtm_addrs &~ RTA_IGN) {
1544                 (void) printf("sockaddrs: ");
1545                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1546                 putchar('\n');
1547         }
1548 #undef  RTA_IGN
1549 }
1550
1551 void
1552 pmsg_common(rtm)
1553         register struct rt_msghdr *rtm;
1554 {
1555         (void) printf("\nlocks: ");
1556         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1557         (void) printf(" inits: ");
1558         bprintf(stdout, rtm->rtm_inits, metricnames);
1559         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1560 }
1561
1562 void
1563 pmsg_addrs(cp, addrs)
1564         char    *cp;
1565         int     addrs;
1566 {
1567         register struct sockaddr *sa;
1568         int i;
1569
1570         if (addrs == 0) {
1571                 (void) putchar('\n');
1572                 return;
1573         }
1574         (void) printf("\nsockaddrs: ");
1575         bprintf(stdout, addrs, addrnames);
1576         (void) putchar('\n');
1577         for (i = 1; i; i <<= 1)
1578                 if (i & addrs) {
1579                         sa = (struct sockaddr *)cp;
1580                         (void) printf(" %s", routename(sa));
1581                         ADVANCE(cp, sa);
1582                 }
1583         (void) putchar('\n');
1584         (void) fflush(stdout);
1585 }
1586
1587 void
1588 bprintf(fp, b, s)
1589         register FILE *fp;
1590         register int b;
1591         register u_char *s;
1592 {
1593         register int i;
1594         int gotsome = 0;
1595
1596         if (b == 0)
1597                 return;
1598         while ((i = *s++) != 0) {
1599                 if (b & (1 << (i-1))) {
1600                         if (gotsome == 0)
1601                                 i = '<';
1602                         else
1603                                 i = ',';
1604                         (void) putc(i, fp);
1605                         gotsome = 1;
1606                         for (; (i = *s) > 32; s++)
1607                                 (void) putc(i, fp);
1608                 } else
1609                         while (*s > 32)
1610                                 s++;
1611         }
1612         if (gotsome)
1613                 (void) putc('>', fp);
1614 }
1615
1616 int
1617 keyword(cp)
1618         char *cp;
1619 {
1620         register struct keytab *kt = keywords;
1621
1622         while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1623                 kt++;
1624         return kt->kt_i;
1625 }
1626
1627 void
1628 sodump(su, which)
1629         register sup su;
1630         char *which;
1631 {
1632         switch (su->sa.sa_family) {
1633         case AF_LINK:
1634                 (void) printf("%s: link %s; ",
1635                     which, link_ntoa(&su->sdl));
1636                 break;
1637         case AF_INET:
1638                 (void) printf("%s: inet %s; ",
1639                     which, inet_ntoa(su->sin.sin_addr));
1640                 break;
1641         case AF_APPLETALK:
1642                 (void) printf("%s: atalk %s; ",
1643                     which, atalk_ntoa(su->sat.sat_addr));
1644                 break;
1645 #ifdef NS
1646         case AF_NS:
1647                 (void) printf("%s: xns %s; ",
1648                     which, ns_ntoa(su->sns.sns_addr));
1649                 break;
1650 #endif
1651         }
1652         (void) fflush(stdout);
1653 }
1654
1655 /* States*/
1656 #define VIRGIN  0
1657 #define GOTONE  1
1658 #define GOTTWO  2
1659 /* Inputs */
1660 #define DIGIT   (4*0)
1661 #define END     (4*1)
1662 #define DELIM   (4*2)
1663
1664 void
1665 sockaddr(addr, sa)
1666         register char *addr;
1667         register struct sockaddr *sa;
1668 {
1669         register char *cp = (char *)sa;
1670         int size = sa->sa_len;
1671         char *cplim = cp + size;
1672         register int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1673
1674         memset(cp, 0, size);
1675         cp++;
1676         do {
1677                 if ((*addr >= '0') && (*addr <= '9')) {
1678                         new = *addr - '0';
1679                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1680                         new = *addr - 'a' + 10;
1681                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1682                         new = *addr - 'A' + 10;
1683                 } else if (*addr == 0)
1684                         state |= END;
1685                 else
1686                         state |= DELIM;
1687                 addr++;
1688                 switch (state /* | INPUT */) {
1689                 case GOTTWO | DIGIT:
1690                         *cp++ = byte; /*FALLTHROUGH*/
1691                 case VIRGIN | DIGIT:
1692                         state = GOTONE; byte = new; continue;
1693                 case GOTONE | DIGIT:
1694                         state = GOTTWO; byte = new + (byte << 4); continue;
1695                 default: /* | DELIM */
1696                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1697                 case GOTONE | END:
1698                 case GOTTWO | END:
1699                         *cp++ = byte; /* FALLTHROUGH */
1700                 case VIRGIN | END:
1701                         break;
1702                 }
1703                 break;
1704         } while (cp < cplim);
1705         sa->sa_len = cp - (char *)sa;
1706 }
1707
1708 int
1709 atalk_aton(const char *text, struct at_addr *addr)
1710 {
1711         u_int net, node;
1712
1713         if (sscanf(text, "%u.%u", &net, &node) != 2
1714             || net > 0xffff || node > 0xff)
1715                 return(0);
1716         addr->s_net = htons(net);
1717         addr->s_node = node;
1718         return(1);
1719 }
1720
1721 char *
1722 atalk_ntoa(struct at_addr at)
1723 {
1724         static char buf[20];
1725
1726         (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1727         return(buf);
1728 }