route.tproj/route.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1983, 1989, 1991, 1993
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57 #ifndef lint
  58 static const char copyright[] =
  59 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\
  60         The Regents of the University of California.  All rights reserved.\n";
  61 #endif /* not lint */
  62
  63 #ifndef lint
  64 #if 0
  65 static char sccsid[] = "@(#)route.c     8.3 (Berkeley) 3/19/94";
  66 #endif
  67 static const char rcsid[] =
  68         "$Id: route.c,v 1.3 2003/01/07 21:03:05 bbraun Exp $";
  69 #endif /* not lint */
  70
  71 #include <sys/param.h>
  72 #include <sys/file.h>
  73 #include <sys/socket.h>
  74 #include <sys/ioctl.h>
  75 #include <sys/sysctl.h>
  76 #include <sys/types.h>
  77
  78 #include <net/if.h>
  79 #include <net/route.h>
  80 #include <net/if_dl.h>
  81 #include <netinet/in.h>
  82 #ifndef __APPLE__
  83 #include <netatalk/at.h>
  84 #endif
  85 #ifdef NS
  86 #include <netns/ns.h>
  87 #endif
  88 #include <arpa/inet.h>
  89 #include <netdb.h>
  90
  91 #include <ctype.h>
  92 #include <err.h>
  93 #include <errno.h>
  94 #include <paths.h>
  95 #include <stdio.h>
  96 #include <stdlib.h>
  97 #include <string.h>
  98 #include <sysexits.h>
  99 #include <unistd.h>
 100 #include <ifaddrs.h>
 101
 102 struct keytab {
 103         char    *kt_cp;
 104         int     kt_i;
 105 } keywords[] = {
 106 #include "keywords.h"
 107         {0, 0}
 108 };
 109
 110 struct  ortentry route;
 111 union   sockunion {
 112         struct  sockaddr sa;
 113         struct  sockaddr_in sin;
 114 #ifdef INET6
 115         struct  sockaddr_in6 sin6;
 116 #endif
 117 #ifndef __APPLE__
 118         struct  sockaddr_at sat;
 119 #endif
 120 #ifdef NS
 121         struct  sockaddr_ns sns;
 122 #endif
 123         struct  sockaddr_dl sdl;
 124         struct  sockaddr_storage ss; /* added to avoid memory overrun */
 125 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
 126
 127 typedef union sockunion *sup;
 128 int     pid, rtm_addrs, uid;
 129 int     s;
 130 int     forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword();
 131 int     iflag, verbose, aflen = sizeof (struct sockaddr_in);
 132 int     locking, lockrest, debugonly;
 133 struct  rt_metrics rt_metrics;
 134 u_long  rtm_inits;
 135 #ifndef __APPLE__
 136 int     atalk_aton __P((const char *, struct at_addr *));
 137 char    *atalk_ntoa __P((struct at_addr));
 138 #endif
 139 const char      *routename(), *netname();
 140 void    flushroutes(), newroute(), monitor(), sockaddr(), sodump(), bprintf();
 141 void    print_getmsg(), print_rtmsg(), pmsg_common(), pmsg_addrs(), mask_addr();
 142 int     getaddr(), rtmsg(), x25_makemask();
 143 int     prefixlen();
 144 extern  char *iso_ntoa();
 145
 146 void usage __P((const char *));
 147
 148 void
 149 usage(cp)
 150         const char *cp;
 151 {
 152         if (cp)
 153                 warnx("bad keyword: %s", cp);
 154         (void) fprintf(stderr,
 155             "usage: route [-dnqtv] command [[modifiers] args]\n");
 156         exit(EX_USAGE);
 157         /* NOTREACHED */
 158 }
 159
 160 #define ROUNDUP(a) \
 161         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 162 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 163
 164 int
 165 main(argc, argv)
 166         int argc;
 167         char **argv;
 168 {
 169         int ch;
 170
 171         if (argc < 2)
 172                 usage((char *)NULL);
 173
 174         while ((ch = getopt(argc, argv, "nqdtv")) != -1)
 175                 switch(ch) {
 176                 case 'n':
 177                         nflag = 1;
 178                         break;
 179                 case 'q':
 180                         qflag = 1;
 181                         break;
 182                 case 'v':
 183                         verbose = 1;
 184                         break;
 185                 case 't':
 186                         tflag = 1;
 187                         break;
 188                 case 'd':
 189                         debugonly = 1;
 190                         break;
 191                 case '?':
 192                 default:
 193                         usage((char *)NULL);
 194                 }
 195         argc -= optind;
 196         argv += optind;
 197
 198         pid = getpid();
 199         uid = getuid();
 200         if (tflag)
 201                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 202         else
 203                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 204         if (s < 0)
 205                 err(EX_OSERR, "socket");
 206         setuid(uid);
 207         if (*argv)
 208                 switch (keyword(*argv)) {
 209                 case K_GET:
 210                         uid = 0;
 211                         /* FALLTHROUGH */
 212
 213                 case K_CHANGE:
 214                 case K_ADD:
 215                 case K_DELETE:
 216                         newroute(argc, argv);
 217                         exit(0);
 218                         /* NOTREACHED */
 219
 220                 case K_MONITOR:
 221                         monitor();
 222                         /* NOTREACHED */
 223
 224                 case K_FLUSH:
 225                         flushroutes(argc, argv);
 226                         exit(0);
 227                         /* NOTREACHED */
 228                 }
 229         usage(*argv);
 230         /* NOTREACHED */
 231 }
 232
 233 /*
 234  * Purge all entries in the routing tables not
 235  * associated with network interfaces.
 236  */
 237 void
 238 flushroutes(argc, argv)
 239         int argc;
 240         char *argv[];
 241 {
 242         size_t needed;
 243         int mib[6], rlen, seqno;
 244         char *buf, *next, *lim;
 245         register struct rt_msghdr *rtm;
 246
 247         if (uid) {
 248                 errx(EX_NOPERM, "must be root to alter routing table");
 249         }
 250         shutdown(s, 0); /* Don't want to read back our messages */
 251         if (argc > 1) {
 252                 argv++;
 253                 if (argc == 2 && **argv == '-')
 254                     switch (keyword(*argv + 1)) {
 255                         case K_INET:
 256                                 af = AF_INET;
 257                                 break;
 258 #ifdef INET6
 259                         case K_INET6:
 260                                 af = AF_INET6;
 261                                 break;
 262 #endif
 263 #ifndef __APPLE__
 264                         case K_ATALK:
 265                                 af = AF_APPLETALK;
 266                                 break;
 267 #endif
 268 #ifdef NS
 269                         case K_XNS:
 270                                 af = AF_NS;
 271                                 break;
 272 #endif
 273                         case K_LINK:
 274                                 af = AF_LINK;
 275                                 break;
 276                         default:
 277                                 goto bad;
 278                 } else
 279 bad:                    usage(*argv);
 280         }
 281         mib[0] = CTL_NET;
 282         mib[1] = PF_ROUTE;
 283         mib[2] = 0;             /* protocol */
 284         mib[3] = 0;             /* wildcard address family */
 285         mib[4] = NET_RT_DUMP;
 286         mib[5] = 0;             /* no flags */
 287         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 288                 err(EX_OSERR, "route-sysctl-estimate");
 289         if ((buf = malloc(needed)) == NULL)
 290                 errx(EX_OSERR, "malloc failed");
 291         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 292                 err(EX_OSERR, "route-sysctl-get");
 293         lim = buf + needed;
 294         if (verbose)
 295                 (void) printf("Examining routing table from sysctl\n");
 296         seqno = 0;              /* ??? */
 297         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 298                 rtm = (struct rt_msghdr *)next;
 299                 if (verbose)
 300                         print_rtmsg(rtm, rtm->rtm_msglen);
 301                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 302                         continue;
 303                 if (af) {
 304                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 305
 306                         if (sa->sa_family != af)
 307                                 continue;
 308                 }
 309                 if (debugonly)
 310                         continue;
 311                 rtm->rtm_type = RTM_DELETE;
 312                 rtm->rtm_seq = seqno;
 313                 rlen = write(s, next, rtm->rtm_msglen);
 314                 if (rlen < (int)rtm->rtm_msglen) {
 315                         warn("write to routing socket");
 316                         (void) printf("got only %d for rlen\n", rlen);
 317                         break;
 318                 }
 319                 seqno++;
 320                 if (qflag)
 321                         continue;
 322                 if (verbose)
 323                         print_rtmsg(rtm, rlen);
 324                 else {
 325                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 326                         (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 327                             routename(sa) : netname(sa));
 328                         sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
 329                         (void) printf("%-20.20s ", routename(sa));
 330                         (void) printf("done\n");
 331                 }
 332         }
 333 }
 334
 335 const char *
 336 routename(sa)
 337         struct sockaddr *sa;
 338 {
 339         register char *cp;
 340         static char line[MAXHOSTNAMELEN + 1];
 341         struct hostent *hp;
 342         static char domain[MAXHOSTNAMELEN + 1];
 343         static int first = 1;
 344 #ifdef NS
 345         char *ns_print();
 346 #endif
 347
 348         if (first) {
 349                 first = 0;
 350                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 351                     (cp = index(domain, '.'))) {
 352                         domain[MAXHOSTNAMELEN] = '\0';
 353                         (void) strcpy(domain, cp + 1);
 354                 } else
 355                         domain[0] = 0;
 356         }
 357
 358         if (sa->sa_len == 0)
 359                 strcpy(line, "default");
 360         else switch (sa->sa_family) {
 361
 362         case AF_INET:
 363             {   struct in_addr in;
 364                 in = ((struct sockaddr_in *)sa)->sin_addr;
 365
 366                 cp = 0;
 367                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 368                         cp = "default";
 369                 if (cp == 0 && !nflag) {
 370                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 371                                 AF_INET);
 372                         if (hp) {
 373                                 if ((cp = index(hp->h_name, '.')) &&
 374                                     !strcmp(cp + 1, domain))
 375                                         *cp = 0;
 376                                 cp = hp->h_name;
 377                         }
 378                 }
 379                 if (cp) {
 380                         strncpy(line, cp, sizeof(line) - 1);
 381                         line[sizeof(line) - 1] = '\0';
 382                 } else {
 383                         /* XXX - why not inet_ntoa()? */
 384 #define C(x)    (unsigned)((x) & 0xff)
 385                         in.s_addr = ntohl(in.s_addr);
 386                         (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 387                            C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
 388                 }
 389                 break;
 390             }
 391
 392 #ifdef INET6
 393         case AF_INET6:
 394         {
 395                 struct sockaddr_in6 sin6; /* use static var for safety */
 396                 int niflags = 0;
 397 #ifdef NI_WITHSCOPEID
 398                 niflags = NI_WITHSCOPEID;
 399 #endif
 400
 401                 memset(&sin6, 0, sizeof(sin6));
 402                 memcpy(&sin6, sa, sa->sa_len);
 403                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 404                 sin6.sin6_family = AF_INET6;
 405 #ifdef __KAME__
 406                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 407                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 408                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 409                     sin6.sin6_scope_id == 0) {
 410                         sin6.sin6_scope_id =
 411                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 412                         sin6.sin6_addr.s6_addr[2] = 0;
 413                         sin6.sin6_addr.s6_addr[3] = 0;
 414                 }
 415 #endif
 416                 if (nflag)
 417                         niflags |= NI_NUMERICHOST;
 418                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 419                     line, sizeof(line), NULL, 0, niflags) != 0)
 420                         strncpy(line, "invalid", sizeof(line));
 421
 422                 return(line);
 423         }
 424 #endif
 425 #ifndef __APPLE__
 426         case AF_APPLETALK:
 427                 (void) snprintf(line, sizeof(line), "atalk %s",
 428                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 429                 break;
 430 #endif
 431
 432 #ifdef NS
 433         case AF_NS:
 434                 return (ns_print((struct sockaddr_ns *)sa));
 435 #endif
 436
 437         case AF_LINK:
 438                 return (link_ntoa((struct sockaddr_dl *)sa));
 439
 440         default:
 441             {   u_short *s = (u_short *)sa;
 442                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 443                 char *cp = line + sprintf(line, "(%d)", sa->sa_family);
 444                 char *cpe = line + sizeof(line);
 445
 446                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 447                         cp += snprintf(cp, cpe - cp, " %x", *s);
 448                 break;
 449             }
 450         }
 451         return (line);
 452 }
 453
 454 /*
 455  * Return the name of the network whose address is given.
 456  * The address is assumed to be that of a net or subnet, not a host.
 457  */
 458 const char *
 459 netname(sa)
 460         struct sockaddr *sa;
 461 {
 462         char *cp = 0;
 463         static char line[MAXHOSTNAMELEN + 1];
 464         struct netent *np = 0;
 465         u_long net, mask;
 466         register u_long i;
 467         int subnetshift;
 468 #ifdef NS
 469         char *ns_print();
 470 #endif
 471
 472         switch (sa->sa_family) {
 473
 474         case AF_INET:
 475             {   struct in_addr in;
 476                 in = ((struct sockaddr_in *)sa)->sin_addr;
 477
 478                 i = in.s_addr = ntohl(in.s_addr);
 479                 if (in.s_addr == 0)
 480                         cp = "default";
 481                 else if (!nflag) {
 482                         if (IN_CLASSA(i)) {
 483                                 mask = IN_CLASSA_NET;
 484                                 subnetshift = 8;
 485                         } else if (IN_CLASSB(i)) {
 486                                 mask = IN_CLASSB_NET;
 487                                 subnetshift = 8;
 488                         } else {
 489                                 mask = IN_CLASSC_NET;
 490                                 subnetshift = 4;
 491                         }
 492                         /*
 493                          * If there are more bits than the standard mask
 494                          * would suggest, subnets must be in use.
 495                          * Guess at the subnet mask, assuming reasonable
 496                          * width subnet fields.
 497                          */
 498                         while (in.s_addr &~ mask)
 499                                 mask = (long)mask >> subnetshift;
 500                         net = in.s_addr & mask;
 501                         while ((mask & 1) == 0)
 502                                 mask >>= 1, net >>= 1;
 503                         np = getnetbyaddr(net, AF_INET);
 504                         if (np)
 505                                 cp = np->n_name;
 506                 }
 507                 if (cp)
 508                         strncpy(line, cp, sizeof(line));
 509                 else if ((in.s_addr & 0xffffff) == 0)
 510                         (void) sprintf(line, "%u", C(in.s_addr >> 24));
 511                 else if ((in.s_addr & 0xffff) == 0)
 512                         (void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
 513                             C(in.s_addr >> 16));
 514                 else if ((in.s_addr & 0xff) == 0)
 515                         (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 516                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 517                 else
 518                         (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 519                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 520                             C(in.s_addr));
 521                 break;
 522             }
 523
 524 #ifdef INET6
 525         case AF_INET6:
 526         {
 527                 struct sockaddr_in6 sin6; /* use static var for safety */
 528                 int niflags = 0;
 529 #ifdef NI_WITHSCOPEID
 530                 niflags = NI_WITHSCOPEID;
 531 #endif
 532
 533                 memset(&sin6, 0, sizeof(sin6));
 534                 memcpy(&sin6, sa, sa->sa_len);
 535                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 536                 sin6.sin6_family = AF_INET6;
 537 #ifdef __KAME__
 538                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 539                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 540                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 541                     sin6.sin6_scope_id == 0) {
 542                         sin6.sin6_scope_id =
 543                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 544                         sin6.sin6_addr.s6_addr[2] = 0;
 545                         sin6.sin6_addr.s6_addr[3] = 0;
 546                 }
 547 #endif
 548                 if (nflag)
 549                         niflags |= NI_NUMERICHOST;
 550                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 551                     line, sizeof(line), NULL, 0, niflags) != 0)
 552                         strncpy(line, "invalid", sizeof(line));
 553
 554                 return(line);
 555         }
 556 #endif
 557
 558 #ifndef __APPLE__
 559         case AF_APPLETALK:
 560                 (void) snprintf(line, sizeof(line), "atalk %s",
 561                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 562                 break;
 563 #endif
 564
 565 #ifdef NS
 566         case AF_NS:
 567                 return (ns_print((struct sockaddr_ns *)sa));
 568                 break;
 569 #endif
 570
 571         case AF_LINK:
 572                 return (link_ntoa((struct sockaddr_dl *)sa));
 573
 574
 575         default:
 576             {   u_short *s = (u_short *)sa->sa_data;
 577                 u_short *slim = s + ((sa->sa_len + 1)>>1);
 578                 char *cp = line + sprintf(line, "af %d:", sa->sa_family);
 579                 char *cpe = line + sizeof(line);
 580
 581                 while (s < slim && cp < cpe)
 582                         cp += snprintf(cp, cpe - cp, " %x", *s++);
 583                 break;
 584             }
 585         }
 586         return (line);
 587 }
 588
 589 void
 590 set_metric(value, key)
 591         char *value;
 592         int key;
 593 {
 594         int flag = 0;
 595         u_long noval, *valp = &noval;
 596
 597         switch (key) {
 598 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 599         caseof(K_MTU, RTV_MTU, rmx_mtu);
 600         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 601         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 602         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 603         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 604         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 605         caseof(K_RTT, RTV_RTT, rmx_rtt);
 606         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 607         }
 608         rtm_inits |= flag;
 609         if (lockrest || locking)
 610                 rt_metrics.rmx_locks |= flag;
 611         if (locking)
 612                 locking = 0;
 613         *valp = atoi(value);
 614 }
 615
 616 void
 617 newroute(argc, argv)
 618         int argc;
 619         register char **argv;
 620 {
 621         char *cmd, *dest = "", *gateway = "", *err;
 622         int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 623         int key;
 624         struct hostent *hp = 0;
 625
 626         if (uid) {
 627                 errx(EX_NOPERM, "must be root to alter routing table");
 628         }
 629         cmd = argv[0];
 630         if (*cmd != 'g')
 631                 shutdown(s, 0); /* Don't want to read back our messages */
 632         while (--argc > 0) {
 633                 if (**(++argv)== '-') {
 634                         switch (key = keyword(1 + *argv)) {
 635                         case K_LINK:
 636                                 af = AF_LINK;
 637                                 aflen = sizeof(struct sockaddr_dl);
 638                                 break;
 639                         case K_INET:
 640                                 af = AF_INET;
 641                                 aflen = sizeof(struct sockaddr_in);
 642                                 break;
 643 #ifdef INET6
 644                         case K_INET6:
 645                                 af = AF_INET6;
 646                                 aflen = sizeof(struct sockaddr_in6);
 647                                 break;
 648 #endif
 649 #ifndef __APPLE__
 650                         case K_ATALK:
 651                                 af = AF_APPLETALK;
 652                                 aflen = sizeof(struct sockaddr_at);
 653                                 break;
 654 #endif
 655                         case K_SA:
 656                                 af = PF_ROUTE;
 657                                 aflen = sizeof(union sockunion);
 658                                 break;
 659 #ifdef NS
 660                         case K_XNS:
 661                                 af = AF_NS;
 662                                 aflen = sizeof(struct sockaddr_ns);
 663                                 break;
 664 #endif
 665                         case K_IFACE:
 666                         case K_INTERFACE:
 667                                 iflag++;
 668                                 break;
 669                         case K_NOSTATIC:
 670                                 flags &= ~RTF_STATIC;
 671                                 break;
 672                         case K_LLINFO:
 673                                 flags |= RTF_LLINFO;
 674                                 break;
 675                         case K_LOCK:
 676                                 locking = 1;
 677                                 break;
 678                         case K_LOCKREST:
 679                                 lockrest = 1;
 680                                 break;
 681                         case K_HOST:
 682                                 forcehost++;
 683                                 break;
 684                         case K_REJECT:
 685                                 flags |= RTF_REJECT;
 686                                 break;
 687                         case K_BLACKHOLE:
 688                                 flags |= RTF_BLACKHOLE;
 689                                 break;
 690                         case K_PROTO1:
 691                                 flags |= RTF_PROTO1;
 692                                 break;
 693                         case K_PROTO2:
 694                                 flags |= RTF_PROTO2;
 695                                 break;
 696                         case K_CLONING:
 697                                 flags |= RTF_CLONING;
 698                                 break;
 699                         case K_XRESOLVE:
 700                                 flags |= RTF_XRESOLVE;
 701                                 break;
 702                         case K_STATIC:
 703                                 flags |= RTF_STATIC;
 704                                 break;
 705                         case K_IFA:
 706                                 if (!--argc)
 707                                         usage((char *)NULL);
 708                                 (void) getaddr(RTA_IFA, *++argv, 0);
 709                                 break;
 710                         case K_IFP:
 711                                 if (!--argc)
 712                                         usage((char *)NULL);
 713                                 (void) getaddr(RTA_IFP, *++argv, 0);
 714                                 break;
 715                         case K_GENMASK:
 716                                 if (!--argc)
 717                                         usage((char *)NULL);
 718                                 (void) getaddr(RTA_GENMASK, *++argv, 0);
 719                                 break;
 720                         case K_GATEWAY:
 721                                 if (!--argc)
 722                                         usage((char *)NULL);
 723                                 (void) getaddr(RTA_GATEWAY, *++argv, 0);
 724                                 break;
 725                         case K_DST:
 726                                 if (!--argc)
 727                                         usage((char *)NULL);
 728                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 729                                 dest = *argv;
 730                                 break;
 731                         case K_NETMASK:
 732                                 if (!--argc)
 733                                         usage((char *)NULL);
 734                                 (void) getaddr(RTA_NETMASK, *++argv, 0);
 735                                 /* FALLTHROUGH */
 736                         case K_NET:
 737                                 forcenet++;
 738                                 break;
 739                         case K_PREFIXLEN:
 740                                 if (!--argc)
 741                                         usage((char *)NULL);
 742                                 if (prefixlen(*++argv) == -1) {
 743                                         forcenet = 0;
 744                                         ishost = 1;
 745                                 } else {
 746                                         forcenet = 1;
 747                                         ishost = 0;
 748                                 }
 749                                 break;
 750                         case K_MTU:
 751                         case K_HOPCOUNT:
 752                         case K_EXPIRE:
 753                         case K_RECVPIPE:
 754                         case K_SENDPIPE:
 755                         case K_SSTHRESH:
 756                         case K_RTT:
 757                         case K_RTTVAR:
 758                                 if (!--argc)
 759                                         usage((char *)NULL);
 760                                 set_metric(*++argv, key);
 761                                 break;
 762                         default:
 763                                 usage(1+*argv);
 764                         }
 765                 } else {
 766                         if ((rtm_addrs & RTA_DST) == 0) {
 767                                 dest = *argv;
 768                                 ishost = getaddr(RTA_DST, *argv, &hp);
 769                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 770                                 gateway = *argv;
 771                                 (void) getaddr(RTA_GATEWAY, *argv, &hp);
 772                         } else {
 773                                 (void) getaddr(RTA_NETMASK, *argv, 0);
 774                         }
 775                 }
 776         }
 777         if (forcehost) {
 778                 ishost = 1;
 779 #ifdef INET6
 780                 if (af == AF_INET6) {
 781                         rtm_addrs &= ~RTA_NETMASK;
 782                         memset((void *)&so_mask, 0, sizeof(so_mask));
 783                 }
 784 #endif
 785         }
 786         if (forcenet)
 787                 ishost = 0;
 788         flags |= RTF_UP;
 789         if (ishost)
 790                 flags |= RTF_HOST;
 791         if (iflag == 0)
 792                 flags |= RTF_GATEWAY;
 793         if (so_mask.sin.sin_family == AF_INET) {
 794                 // make sure the mask is contiguous
 795                 long i;
 796                 for (i = 0; i < 32; i++)
 797                         if (((so_mask.sin.sin_addr.s_addr) & ntohl((1 << i))) != 0)
 798                                 break;
 799                 for (; i < 32; i++)
 800                         if (((so_mask.sin.sin_addr.s_addr) & ntohl((1 << i))) == 0)
 801                                 errx(EX_NOHOST, "invalid mask: %s", inet_ntoa(so_mask.sin.sin_addr));
 802         }
 803         for (attempts = 1; ; attempts++) {
 804                 errno = 0;
 805                 if ((ret = rtmsg(*cmd, flags)) == 0)
 806                         break;
 807                 if (errno != ENETUNREACH && errno != ESRCH)
 808                         break;
 809                 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 810                         hp->h_addr_list++;
 811                         bcopy(hp->h_addr_list[0], &so_gate.sin.sin_addr,
 812                             MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
 813                 } else
 814                         break;
 815         }
 816         if (*cmd == 'g')
 817                 exit(0);
 818         oerrno = errno;
 819         (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 820         if (*gateway) {
 821                 (void) printf(": gateway %s", gateway);
 822                 if (attempts > 1 && ret == 0 && af == AF_INET)
 823                     (void) printf(" (%s)",
 824                         inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
 825         }
 826         if (ret == 0)
 827                 (void) printf("\n");
 828         else {
 829                 switch (oerrno) {
 830                 case ESRCH:
 831                         err = "not in table";
 832                         break;
 833                 case EBUSY:
 834                         err = "entry in use";
 835                         break;
 836                 case ENOBUFS:
 837                         err = "routing table overflow";
 838                         break;
 839                 default:
 840                         err = strerror(oerrno);
 841                         break;
 842                 }
 843                 (void) printf(": %s\n", err);
 844         }
 845 }
 846
 847 void
 848 inet_makenetandmask(net, sin, bits)
 849         u_long net, bits;
 850         register struct sockaddr_in *sin;
 851 {
 852         u_long addr, mask = 0;
 853         register char *cp;
 854
 855         rtm_addrs |= RTA_NETMASK;
 856         if (bits) {
 857                 addr = net;
 858                 mask = 0xffffffff << (32 - bits);
 859         } else if (net == 0)
 860                 mask = addr = 0;
 861         else if (net < 128) {
 862                 addr = net << IN_CLASSA_NSHIFT;
 863                 mask = IN_CLASSA_NET;
 864         } else if (net < 65536) {
 865                 addr = net << IN_CLASSB_NSHIFT;
 866                 mask = IN_CLASSB_NET;
 867         } else if (net < 16777216L) {
 868                 addr = net << IN_CLASSC_NSHIFT;
 869                 mask = IN_CLASSC_NET;
 870         } else {
 871                 addr = net;
 872                 if ((addr & IN_CLASSA_HOST) == 0)
 873                         mask =  IN_CLASSA_NET;
 874                 else if ((addr & IN_CLASSB_HOST) == 0)
 875                         mask =  IN_CLASSB_NET;
 876                 else if ((addr & IN_CLASSC_HOST) == 0)
 877                         mask =  IN_CLASSC_NET;
 878                 else
 879                         mask = -1;
 880         }
 881         sin->sin_addr.s_addr = htonl(addr);
 882         sin = &so_mask.sin;
 883         sin->sin_addr.s_addr = htonl(mask);
 884         sin->sin_len = 0;
 885         sin->sin_family = 0;
 886         cp = (char *)(&sin->sin_addr + 1);
 887         while (*--cp == 0 && cp > (char *)sin)
 888                 ;
 889         sin->sin_len = 1 + cp - (char *)sin;
 890 }
 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                         break;
 985                 }
 986                 return (0);
 987         }
 988         switch (afamily) {
 989 #ifdef INET6
 990         case AF_INET6:
 991         {
 992                 struct addrinfo hints, *res;
 993
 994                 memset(&hints, 0, sizeof(hints));
 995                 hints.ai_family = afamily;      /*AF_INET6*/
 996                 hints.ai_flags = AI_NUMERICHOST;
 997                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
 998                 if (getaddrinfo(s, "0", &hints, &res) != 0 ||
 999                     res->ai_family != AF_INET6 ||
1000                     res->ai_addrlen != sizeof(su->sin6)) {
1001                         (void) fprintf(stderr, "%s: bad value\n", s);
1002                         exit(1);
1003                 }
1004                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
1005 #ifdef __KAME__
1006                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
1007                      IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) &&
1008                     su->sin6.sin6_scope_id) {
1009                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1010                                 htons(su->sin6.sin6_scope_id);
1011                         su->sin6.sin6_scope_id = 0;
1012                 }
1013 #endif
1014                 freeaddrinfo(res);
1015                 return (0);
1016         }
1017 #endif /* INET6 */
1018
1019 #ifdef NS
1020         case AF_NS:
1021                 if (which == RTA_DST) {
1022                         extern short ns_bh[3];
1023                         struct sockaddr_ns *sms = &(so_mask.sns);
1024                         bzero((char *)sms, sizeof(*sms));
1025                         sms->sns_family = 0;
1026                         sms->sns_len = 6;
1027                         sms->sns_addr.x_net = *(union ns_net *)ns_bh;
1028                         rtm_addrs |= RTA_NETMASK;
1029                 }
1030                 su->sns.sns_addr = ns_addr(s);
1031                 return (!ns_nullhost(su->sns.sns_addr));
1032 #endif
1033
1034
1035 #ifndef __APPLE__
1036         case AF_APPLETALK:
1037                 if (!atalk_aton(s, &su->sat.sat_addr))
1038                         errx(EX_NOHOST, "bad address: %s", s);
1039                 rtm_addrs |= RTA_NETMASK;
1040                 return(forcehost || su->sat.sat_addr.s_node != 0);
1041 #endif
1042
1043         case AF_LINK:
1044                 link_addr(s, &su->sdl);
1045                 return (1);
1046
1047
1048         case PF_ROUTE:
1049                 su->sa.sa_len = sizeof(*su);
1050                 sockaddr(s, &su->sa);
1051                 return (1);
1052
1053         case AF_INET:
1054         default:
1055                 break;
1056         }
1057
1058         if (hpp == NULL)
1059                 hpp = &hp;
1060         *hpp = NULL;
1061
1062         q = strchr(s,'/');
1063         if (q && which == RTA_DST) {
1064                 *q = '\0';
1065                 if ((val = inet_addr(s)) != INADDR_NONE) {
1066                         inet_makenetandmask(
1067                                 ntohl(val), &su->sin, strtoul(q+1, 0, 0));
1068                         return (0);
1069                 }
1070                 *q = '/';
1071         }
1072         if ((which != RTA_DST || forcenet == 0) &&
1073             (val = inet_addr(s)) != INADDR_NONE) {
1074                 su->sin.sin_addr.s_addr = val;
1075                 if (which != RTA_DST ||
1076                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1077                         return (1);
1078                 else {
1079                         val = ntohl(val);
1080                         goto netdone;
1081                 }
1082         }
1083         if (which == RTA_DST && forcehost == 0 &&
1084             ((val = inet_network(s)) != INADDR_NONE ||
1085             ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
1086 netdone:
1087                 inet_makenetandmask(val, &su->sin, 0);
1088                 return (0);
1089         }
1090         hp = gethostbyname(s);
1091         if (hp) {
1092                 *hpp = hp;
1093                 su->sin.sin_family = hp->h_addrtype;
1094                 bcopy(hp->h_addr, (char *)&su->sin.sin_addr,
1095                     MIN(hp->h_length, sizeof(su->sin.sin_addr)));
1096                 return (1);
1097         }
1098         errx(EX_NOHOST, "bad address: %s", s);
1099 }
1100
1101 int
1102 prefixlen(s)
1103         char *s;
1104 {
1105         int len = atoi(s), q, r;
1106         int max;
1107         char *p;
1108
1109         rtm_addrs |= RTA_NETMASK;
1110         switch (af) {
1111 #ifdef INET6
1112         case AF_INET6:
1113                 max = 128;
1114                 p = (char *)&so_mask.sin6.sin6_addr;
1115                 break;
1116 #endif
1117         case AF_INET:
1118                 max = 32;
1119                 p = (char *)&so_mask.sin.sin_addr;
1120                 break;
1121         default:
1122                 (void) fprintf(stderr, "prefixlen not supported in this af\n");
1123                 exit(1);
1124                 /*NOTREACHED*/
1125         }
1126
1127         if (len < 0 || max < len) {
1128                 (void) fprintf(stderr, "%s: bad value\n", s);
1129                 exit(1);
1130         }
1131
1132         q = len >> 3;
1133         r = len & 7;
1134         so_mask.sa.sa_family = af;
1135         so_mask.sa.sa_len = aflen;
1136         memset((void *)p, 0, max / 8);
1137         if (q > 0)
1138                 memset((void *)p, 0xff, q);
1139         if (r > 0)
1140                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1141         if (len == max)
1142                 return -1;
1143         else
1144                 return len;
1145 }
1146
1147 #ifdef NS
1148 short ns_nullh[] = {0,0,0};
1149 short ns_bh[] = {-1,-1,-1};
1150
1151 char *
1152 ns_print(sns)
1153         struct sockaddr_ns *sns;
1154 {
1155         struct ns_addr work;
1156         union { union ns_net net_e; u_long long_e; } net;
1157         u_short port;
1158         static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25];
1159         char *host = "";
1160         register char *p;
1161         register u_char *q;
1162
1163         work = sns->sns_addr;
1164         port = ntohs(work.x_port);
1165         work.x_port = 0;
1166         net.net_e  = work.x_net;
1167         if (ns_nullhost(work) && net.long_e == 0) {
1168                 if (!port)
1169                         return ("*.*");
1170                 (void) sprintf(mybuf, "*.%XH", port);
1171                 return (mybuf);
1172         }
1173
1174         if (bcmp((char *)ns_bh, (char *)work.x_host.c_host, 6) == 0)
1175                 host = "any";
1176         else if (bcmp((char *)ns_nullh, (char *)work.x_host.c_host, 6) == 0)
1177                 host = "*";
1178         else {
1179                 q = work.x_host.c_host;
1180                 (void) sprintf(chost, "%02X%02X%02X%02X%02X%02XH",
1181                         q[0], q[1], q[2], q[3], q[4], q[5]);
1182                 for (p = chost; *p == '0' && p < chost + 12; p++)
1183                         /* void */;
1184                 host = p;
1185         }
1186         if (port)
1187                 (void) sprintf(cport, ".%XH", htons(port));
1188         else
1189                 *cport = 0;
1190
1191         (void) snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s",
1192                         (unsigned long)ntohl(net.long_e),
1193                         host, cport);
1194         return (mybuf);
1195 }
1196 #endif
1197
1198 void
1199 interfaces()
1200 {
1201         size_t needed;
1202         int mib[6];
1203         char *buf, *lim, *next;
1204         register struct rt_msghdr *rtm;
1205
1206         mib[0] = CTL_NET;
1207         mib[1] = PF_ROUTE;
1208         mib[2] = 0;             /* protocol */
1209         mib[3] = 0;             /* wildcard address family */
1210         mib[4] = NET_RT_IFLIST;
1211         mib[5] = 0;             /* no flags */
1212         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1213                 err(EX_OSERR, "route-sysctl-estimate");
1214         if ((buf = malloc(needed)) == NULL)
1215                 errx(EX_OSERR, "malloc failed");
1216         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1217                 err(EX_OSERR, "actual retrieval of interface table");
1218         lim = buf + needed;
1219         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1220                 rtm = (struct rt_msghdr *)next;
1221                 print_rtmsg(rtm, rtm->rtm_msglen);
1222         }
1223 }
1224
1225 void
1226 monitor()
1227 {
1228         int n;
1229         char msg[2048];
1230
1231         verbose = 1;
1232         if (debugonly) {
1233                 interfaces();
1234                 exit(0);
1235         }
1236         for(;;) {
1237                 time_t now;
1238                 n = read(s, msg, 2048);
1239                 now = time(NULL);
1240                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1241                 print_rtmsg((struct rt_msghdr *)msg, n);
1242         }
1243 }
1244
1245 struct {
1246         struct  rt_msghdr m_rtm;
1247         char    m_space[512];
1248 } m_rtmsg;
1249
1250 int
1251 rtmsg(cmd, flags)
1252         int cmd, flags;
1253 {
1254         static int seq;
1255         int rlen;
1256         register char *cp = m_rtmsg.m_space;
1257         register int l;
1258
1259 #define NEXTADDR(w, u) \
1260         if (rtm_addrs & (w)) {\
1261             l = ROUNDUP(u.sa.sa_len); bcopy((char *)&(u), cp, l); cp += l;\
1262             if (verbose) sodump(&(u),"u");\
1263         }
1264
1265         errno = 0;
1266         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
1267         if (cmd == 'a')
1268                 cmd = RTM_ADD;
1269         else if (cmd == 'c')
1270                 cmd = RTM_CHANGE;
1271         else if (cmd == 'g') {
1272                 cmd = RTM_GET;
1273                 if (so_ifp.sa.sa_family == 0) {
1274                         so_ifp.sa.sa_family = AF_LINK;
1275                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1276                         rtm_addrs |= RTA_IFP;
1277                 }
1278         } else
1279                 cmd = RTM_DELETE;
1280 #define rtm m_rtmsg.m_rtm
1281         rtm.rtm_type = cmd;
1282         rtm.rtm_flags = flags;
1283         rtm.rtm_version = RTM_VERSION;
1284         rtm.rtm_seq = ++seq;
1285         rtm.rtm_addrs = rtm_addrs;
1286         rtm.rtm_rmx = rt_metrics;
1287         rtm.rtm_inits = rtm_inits;
1288
1289         if (rtm_addrs & RTA_NETMASK)
1290                 mask_addr();
1291         NEXTADDR(RTA_DST, so_dst);
1292         NEXTADDR(RTA_GATEWAY, so_gate);
1293         NEXTADDR(RTA_NETMASK, so_mask);
1294         NEXTADDR(RTA_GENMASK, so_genmask);
1295         NEXTADDR(RTA_IFP, so_ifp);
1296         NEXTADDR(RTA_IFA, so_ifa);
1297         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1298         if (verbose)
1299                 print_rtmsg(&rtm, l);
1300         if (debugonly)
1301                 return (0);
1302         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1303                 warn("writing to routing socket");
1304                 return (-1);
1305         }
1306         if (cmd == RTM_GET) {
1307                 do {
1308                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1309                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1310                 if (l < 0)
1311                         warn("read from routing socket");
1312                 else
1313                         print_getmsg(&rtm, l);
1314         }
1315 #undef rtm
1316         return (0);
1317 }
1318
1319 void
1320 mask_addr()
1321 {
1322         int olen = so_mask.sa.sa_len;
1323         register char *cp1 = olen + (char *)&so_mask, *cp2;
1324
1325         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1326                 if (*--cp1 != 0) {
1327                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1328                         break;
1329                 }
1330         if ((rtm_addrs & RTA_DST) == 0)
1331                 return;
1332         switch (so_dst.sa.sa_family) {
1333 #ifdef NS
1334         case AF_NS:
1335 #endif
1336         case AF_INET:
1337 #ifdef INET6
1338         case AF_INET6:
1339 #endif
1340         case AF_APPLETALK:
1341         case 0:
1342                 return;
1343         }
1344         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1345         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1346         while (cp2 > cp1)
1347                 *--cp2 = 0;
1348         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1349         while (cp1 > so_dst.sa.sa_data)
1350                 *--cp1 &= *--cp2;
1351 }
1352
1353 char *msgtypes[] = {
1354         "",
1355         "RTM_ADD: Add Route",
1356         "RTM_DELETE: Delete Route",
1357         "RTM_CHANGE: Change Metrics or flags",
1358         "RTM_GET: Report Metrics",
1359         "RTM_LOSING: Kernel Suspects Partitioning",
1360         "RTM_REDIRECT: Told to use different route",
1361         "RTM_MISS: Lookup failed on this address",
1362         "RTM_LOCK: fix specified metrics",
1363         "RTM_OLDADD: caused by SIOCADDRT",
1364         "RTM_OLDDEL: caused by SIOCDELRT",
1365         "RTM_RESOLVE: Route created by cloning",
1366         "RTM_NEWADDR: address being added to iface",
1367         "RTM_DELADDR: address being removed from iface",
1368         "RTM_IFINFO: iface status change",
1369         "RTM_NEWMADDR: new multicast group membership on iface",
1370         "RTM_DELMADDR: multicast group membership removed from iface",
1371         0,
1372 };
1373
1374 char metricnames[] =
1375 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1376 "\1mtu";
1377 char routeflags[] =
1378 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1379 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1380 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1381 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1382 char ifnetflags[] =
1383 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1384 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1385 "\017LINK2\020MULTICAST";
1386 char addrnames[] =
1387 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1388
1389 void
1390 print_rtmsg(rtm, msglen)
1391         register struct rt_msghdr *rtm;
1392         int msglen;
1393 {
1394         struct if_msghdr *ifm;
1395         struct ifa_msghdr *ifam;
1396 #ifdef RTM_NEWMADDR
1397         struct ifma_msghdr *ifmam;
1398 #endif
1399
1400         if (verbose == 0)
1401                 return;
1402         if (rtm->rtm_version != RTM_VERSION) {
1403                 (void) printf("routing message version %d not understood\n",
1404                     rtm->rtm_version);
1405                 return;
1406         }
1407         (void)printf("%s: len %d, ", msgtypes[rtm->rtm_type], rtm->rtm_msglen);
1408         switch (rtm->rtm_type) {
1409         case RTM_IFINFO:
1410                 ifm = (struct if_msghdr *)rtm;
1411                 (void) printf("if# %d, flags:", ifm->ifm_index);
1412                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1413                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1414                 break;
1415         case RTM_NEWADDR:
1416         case RTM_DELADDR:
1417                 ifam = (struct ifa_msghdr *)rtm;
1418                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1419                 bprintf(stdout, ifam->ifam_flags, routeflags);
1420                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1421                 break;
1422 #ifdef RTM_NEWMADDR
1423         case RTM_NEWMADDR:
1424         case RTM_DELMADDR:
1425                 ifmam = (struct ifma_msghdr *)rtm;
1426                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1427                 break;
1428 #endif
1429         default:
1430                 (void) printf("pid: %ld, seq %d, errno %d, flags:",
1431                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1432                 bprintf(stdout, rtm->rtm_flags, routeflags);
1433                 pmsg_common(rtm);
1434         }
1435 }
1436
1437 void
1438 print_getmsg(rtm, msglen)
1439         register struct rt_msghdr *rtm;
1440         int msglen;
1441 {
1442         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1443         struct sockaddr_dl *ifp = NULL;
1444         register struct sockaddr *sa;
1445         register char *cp;
1446         register int i;
1447
1448         (void) printf("   route to: %s\n", routename(&so_dst));
1449         if (rtm->rtm_version != RTM_VERSION) {
1450                 warnx("routing message version %d not understood",
1451                      rtm->rtm_version);
1452                 return;
1453         }
1454         if (rtm->rtm_msglen > msglen) {
1455                 warnx("message length mismatch, in packet %d, returned %d",
1456                       rtm->rtm_msglen, msglen);
1457         }
1458         if (rtm->rtm_errno)  {
1459                 errno = rtm->rtm_errno;
1460                 warn("message indicates error %d", errno);
1461                 return;
1462         }
1463         cp = ((char *)(rtm + 1));
1464         if (rtm->rtm_addrs)
1465                 for (i = 1; i; i <<= 1)
1466                         if (i & rtm->rtm_addrs) {
1467                                 sa = (struct sockaddr *)cp;
1468                                 switch (i) {
1469                                 case RTA_DST:
1470                                         dst = sa;
1471                                         break;
1472                                 case RTA_GATEWAY:
1473                                         gate = sa;
1474                                         break;
1475                                 case RTA_NETMASK:
1476                                         mask = sa;
1477                                         break;
1478                                 case RTA_IFP:
1479                                         if (sa->sa_family == AF_LINK &&
1480                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1481                                                 ifp = (struct sockaddr_dl *)sa;
1482                                         break;
1483                                 }
1484                                 ADVANCE(cp, sa);
1485                         }
1486         if (dst && mask)
1487                 mask->sa_family = dst->sa_family;       /* XXX */
1488         if (dst)
1489                 (void)printf("destination: %s\n", routename(dst));
1490         if (mask) {
1491                 int savenflag = nflag;
1492
1493                 nflag = 1;
1494                 (void)printf("       mask: %s\n", routename(mask));
1495                 nflag = savenflag;
1496         }
1497         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1498                 (void)printf("    gateway: %s\n", routename(gate));
1499         if (ifp)
1500                 (void)printf("  interface: %.*s\n",
1501                     ifp->sdl_nlen, ifp->sdl_data);
1502         (void)printf("      flags: ");
1503         bprintf(stdout, rtm->rtm_flags, routeflags);
1504
1505 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1506 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1507
1508         (void) printf("\n%s\n", "\
1509  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
1510         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1511         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1512         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1513         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1514         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1515         printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1516         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1517         if (rtm->rtm_rmx.rmx_expire)
1518                 rtm->rtm_rmx.rmx_expire -= time(0);
1519         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1520 #undef lock
1521 #undef msec
1522 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1523         if (verbose)
1524                 pmsg_common(rtm);
1525         else if (rtm->rtm_addrs &~ RTA_IGN) {
1526                 (void) printf("sockaddrs: ");
1527                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1528                 putchar('\n');
1529         }
1530 #undef  RTA_IGN
1531 }
1532
1533 void
1534 pmsg_common(rtm)
1535         register struct rt_msghdr *rtm;
1536 {
1537         (void) printf("\nlocks: ");
1538         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1539         (void) printf(" inits: ");
1540         bprintf(stdout, rtm->rtm_inits, metricnames);
1541         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1542 }
1543
1544 void
1545 pmsg_addrs(cp, addrs)
1546         char    *cp;
1547         int     addrs;
1548 {
1549         register struct sockaddr *sa;
1550         int i;
1551
1552         if (addrs == 0) {
1553                 (void) putchar('\n');
1554                 return;
1555         }
1556         (void) printf("\nsockaddrs: ");
1557         bprintf(stdout, addrs, addrnames);
1558         (void) putchar('\n');
1559         for (i = 1; i; i <<= 1)
1560                 if (i & addrs) {
1561                         sa = (struct sockaddr *)cp;
1562                         (void) printf(" %s", routename(sa));
1563                         ADVANCE(cp, sa);
1564                 }
1565         (void) putchar('\n');
1566         (void) fflush(stdout);
1567 }
1568
1569 void
1570 bprintf(fp, b, s)
1571         register FILE *fp;
1572         register int b;
1573         register u_char *s;
1574 {
1575         register int i;
1576         int gotsome = 0;
1577
1578         if (b == 0)
1579                 return;
1580         while ((i = *s++) != 0) {
1581                 if (b & (1 << (i-1))) {
1582                         if (gotsome == 0)
1583                                 i = '<';
1584                         else
1585                                 i = ',';
1586                         (void) putc(i, fp);
1587                         gotsome = 1;
1588                         for (; (i = *s) > 32; s++)
1589                                 (void) putc(i, fp);
1590                 } else
1591                         while (*s > 32)
1592                                 s++;
1593         }
1594         if (gotsome)
1595                 (void) putc('>', fp);
1596 }
1597
1598 int
1599 keyword(cp)
1600         char *cp;
1601 {
1602         register struct keytab *kt = keywords;
1603
1604         while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1605                 kt++;
1606         return kt->kt_i;
1607 }
1608
1609 void
1610 sodump(su, which)
1611         register sup su;
1612         char *which;
1613 {
1614         switch (su->sa.sa_family) {
1615         case AF_LINK:
1616                 (void) printf("%s: link %s; ",
1617                     which, link_ntoa(&su->sdl));
1618                 break;
1619         case AF_INET:
1620                 (void) printf("%s: inet %s; ",
1621                     which, inet_ntoa(su->sin.sin_addr));
1622                 break;
1623 #ifndef __APPLE__
1624         case AF_APPLETALK:
1625                 (void) printf("%s: atalk %s; ",
1626                     which, atalk_ntoa(su->sat.sat_addr));
1627                 break;
1628 #endif
1629 #ifdef NS
1630         case AF_NS:
1631                 (void) printf("%s: xns %s; ",
1632                     which, ns_ntoa(su->sns.sns_addr));
1633                 break;
1634 #endif
1635         }
1636         (void) fflush(stdout);
1637 }
1638
1639 /* States*/
1640 #define VIRGIN  0
1641 #define GOTONE  1
1642 #define GOTTWO  2
1643 /* Inputs */
1644 #define DIGIT   (4*0)
1645 #define END     (4*1)
1646 #define DELIM   (4*2)
1647
1648 void
1649 sockaddr(addr, sa)
1650         register char *addr;
1651         register struct sockaddr *sa;
1652 {
1653         register char *cp = (char *)sa;
1654         int size = sa->sa_len;
1655         char *cplim = cp + size;
1656         register int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1657
1658         bzero(cp, size);
1659         cp++;
1660         do {
1661                 if ((*addr >= '0') && (*addr <= '9')) {
1662                         new = *addr - '0';
1663                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1664                         new = *addr - 'a' + 10;
1665                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1666                         new = *addr - 'A' + 10;
1667                 } else if (*addr == 0)
1668                         state |= END;
1669                 else
1670                         state |= DELIM;
1671                 addr++;
1672                 switch (state /* | INPUT */) {
1673                 case GOTTWO | DIGIT:
1674                         *cp++ = byte; /*FALLTHROUGH*/
1675                 case VIRGIN | DIGIT:
1676                         state = GOTONE; byte = new; continue;
1677                 case GOTONE | DIGIT:
1678                         state = GOTTWO; byte = new + (byte << 4); continue;
1679                 default: /* | DELIM */
1680                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1681                 case GOTONE | END:
1682                 case GOTTWO | END:
1683                         *cp++ = byte; /* FALLTHROUGH */
1684                 case VIRGIN | END:
1685                         break;
1686                 }
1687                 break;
1688         } while (cp < cplim);
1689         sa->sa_len = cp - (char *)sa;
1690 }
1691
1692 #ifndef __APPLE__
1693 int
1694 atalk_aton(const char *text, struct at_addr *addr)
1695 {
1696         u_int net, node;
1697
1698         if (sscanf(text, "%u.%u", &net, &node) != 2
1699             || net > 0xffff || node > 0xff)
1700                 return(0);
1701         addr->s_net = htons(net);
1702         addr->s_node = node;
1703         return(1);
1704 }
1705
1706 char *
1707 atalk_ntoa(struct at_addr at)
1708 {
1709         static char buf[20];
1710
1711         (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1712         return(buf);
1713 }
1714 #endif