route.tproj/route.c

   1 /*
   2  * Copyright (c) 2008-2013 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1983, 1989, 1991, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  */
  60
  61 #include <sys/cdefs.h>
  62
  63 #ifndef lint
  64 __unused static const char copyright[] =
  65 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\
  66         The Regents of the University of California.  All rights reserved.\n";
  67 #endif /* not lint */
  68
  69 #include <sys/param.h>
  70 #include <sys/file.h>
  71 #include <sys/socket.h>
  72 #include <sys/ioctl.h>
  73 #include <sys/sysctl.h>
  74 #include <sys/types.h>
  75
  76 #include <net/if.h>
  77 #include <net/route.h>
  78 #include <net/if_dl.h>
  79 #include <netinet/in.h>
  80 #include <arpa/inet.h>
  81 #include <netdb.h>
  82
  83 #include <ctype.h>
  84 #include <err.h>
  85 #include <errno.h>
  86 #include <paths.h>
  87 #include <stdio.h>
  88 #include <stdlib.h>
  89 #include <string.h>
  90 #include <sysexits.h>
  91 #include <unistd.h>
  92 #include <ifaddrs.h>
  93
  94 struct keytab {
  95         char    *kt_cp;
  96         int     kt_i;
  97 } keywords[] = {
  98 #include "keywords.h"
  99         {0, 0}
 100 };
 101
 102 union   sockunion {
 103         struct  sockaddr sa;
 104         struct  sockaddr_in sin;
 105 #ifdef INET6
 106         struct  sockaddr_in6 sin6;
 107 #endif
 108         struct  sockaddr_dl sdl;
 109         struct  sockaddr_storage ss; /* added to avoid memory overrun */
 110 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
 111
 112 typedef union sockunion *sup;
 113 int     pid, rtm_addrs, uid;
 114 int     s;
 115 int     forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword();
 116 int     iflag, verbose, aflen = sizeof (struct sockaddr_in);
 117 int     locking, lockrest, debugonly;
 118 struct  rt_metrics rt_metrics;
 119 u_long  rtm_inits;
 120 unsigned int ifscope;
 121
 122 static const char *route_strerror(int);
 123 const char      *routename(), *netname();
 124 void    flushroutes(), newroute(), monitor(), sockaddr(), sodump(), bprintf();
 125 void    print_getmsg(), print_rtmsg(), pmsg_common(), pmsg_addrs(), mask_addr();
 126 int     getaddr(), rtmsg(), x25_makemask();
 127 int     prefixlen();
 128 extern  char *iso_ntoa();
 129
 130 static void
 131 inet_makenetandmask(in_addr_t net, struct sockaddr_in *sin,
 132     struct sockaddr_in *sin_mask, in_addr_t bits);
 133
 134 void usage __P((const char *)) __dead2;
 135
 136 void
 137 usage(cp)
 138         const char *cp;
 139 {
 140         if (cp)
 141                 warnx("bad keyword: %s", cp);
 142         (void) fprintf(stderr,
 143             "usage: route [-dnqtv] command [[modifiers] args]\n");
 144         exit(EX_USAGE);
 145         /* NOTREACHED */
 146 }
 147
 148 #define ROUNDUP(a) \
 149         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(uint32_t) - 1))) : sizeof(uint32_t))
 150 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 151
 152 int
 153 main(argc, argv)
 154         int argc;
 155         char **argv;
 156 {
 157         int ch;
 158
 159         if (argc < 2)
 160                 usage((char *)NULL);
 161
 162         while ((ch = getopt(argc, argv, "nqdtv")) != -1)
 163                 switch(ch) {
 164                 case 'n':
 165                         nflag = 1;
 166                         break;
 167                 case 'q':
 168                         qflag = 1;
 169                         break;
 170                 case 'v':
 171                         verbose = 1;
 172                         break;
 173                 case 't':
 174                         tflag = 1;
 175                         break;
 176                 case 'd':
 177                         debugonly = 1;
 178                         break;
 179                 case '?':
 180                 default:
 181                         usage((char *)NULL);
 182                 }
 183         argc -= optind;
 184         argv += optind;
 185
 186         pid = getpid();
 187         uid = geteuid();
 188         if (tflag)
 189                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 190         else
 191                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 192         if (s < 0)
 193                 err(EX_OSERR, "socket");
 194         setuid(uid);
 195         if (*argv)
 196                 switch (keyword(*argv)) {
 197                 case K_GET:
 198                         uid = 0;
 199                         /* FALLTHROUGH */
 200
 201                 case K_CHANGE:
 202                 case K_ADD:
 203                 case K_DELETE:
 204                         newroute(argc, argv);
 205                         exit(0);
 206                         /* NOTREACHED */
 207
 208                 case K_MONITOR:
 209                         monitor();
 210                         /* NOTREACHED */
 211
 212                 case K_FLUSH:
 213                         flushroutes(argc, argv);
 214                         exit(0);
 215                         /* NOTREACHED */
 216                 }
 217         usage(*argv);
 218         /* NOTREACHED */
 219 }
 220
 221 /*
 222  * Purge all entries in the routing tables not
 223  * associated with network interfaces.
 224  */
 225 void
 226 flushroutes(argc, argv)
 227         int argc;
 228         char *argv[];
 229 {
 230         size_t needed;
 231         int mib[6], rlen, seqno;
 232         char *buf, *next, *lim;
 233         register struct rt_msghdr *rtm;
 234
 235         if (uid) {
 236                 errx(EX_NOPERM, "must be root to alter routing table");
 237         }
 238         shutdown(s, 0); /* Don't want to read back our messages */
 239         if (argc > 1) {
 240                 argv++;
 241                 if (argc == 2 && **argv == '-')
 242                     switch (keyword(*argv + 1)) {
 243                         case K_INET:
 244                                 af = AF_INET;
 245                                 break;
 246 #ifdef INET6
 247                         case K_INET6:
 248                                 af = AF_INET6;
 249                                 break;
 250 #endif
 251                         case K_LINK:
 252                                 af = AF_LINK;
 253                                 break;
 254                         default:
 255                                 goto bad;
 256                 } else
 257 bad:                    usage(*argv);
 258         }
 259         mib[0] = CTL_NET;
 260         mib[1] = PF_ROUTE;
 261         mib[2] = 0;             /* protocol */
 262         mib[3] = 0;             /* wildcard address family */
 263         mib[4] = NET_RT_DUMP;
 264         mib[5] = 0;             /* no flags */
 265         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 266                 err(EX_OSERR, "route-sysctl-estimate");
 267         if ((buf = malloc(needed)) == NULL)
 268                 errx(EX_OSERR, "malloc failed");
 269         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 270                 err(EX_OSERR, "route-sysctl-get");
 271         lim = buf + needed;
 272         if (verbose)
 273                 (void) printf("Examining routing table from sysctl\n");
 274         seqno = 0;              /* ??? */
 275         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 276                 rtm = (struct rt_msghdr *)next;
 277                 if (verbose)
 278                         print_rtmsg(rtm, rtm->rtm_msglen);
 279                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 280                         continue;
 281                 if (af) {
 282                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 283
 284                         if (sa->sa_family != af)
 285                                 continue;
 286                 }
 287                 if (debugonly)
 288                         continue;
 289                 rtm->rtm_type = RTM_DELETE;
 290                 rtm->rtm_seq = seqno;
 291                 rlen = write(s, next, rtm->rtm_msglen);
 292                 if (rlen < (int)rtm->rtm_msglen) {
 293                         warn("write to routing socket");
 294                         (void) printf("got only %d for rlen\n", rlen);
 295                         break;
 296                 }
 297                 seqno++;
 298                 if (qflag)
 299                         continue;
 300                 if (verbose)
 301                         print_rtmsg(rtm, rlen);
 302                 else {
 303                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 304                         (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 305                             routename(sa) : netname(sa));
 306                         sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
 307                         (void) printf("%-20.20s ", routename(sa));
 308                         (void) printf("done\n");
 309                 }
 310         }
 311 }
 312
 313 const char *
 314 routename(sa)
 315         struct sockaddr *sa;
 316 {
 317         register char *cp;
 318         static char line[MAXHOSTNAMELEN + 1];
 319         struct hostent *hp;
 320         static char domain[MAXHOSTNAMELEN + 1];
 321         static int first = 1;
 322
 323         if (first) {
 324                 first = 0;
 325                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 326                     (cp = index(domain, '.'))) {
 327                         domain[MAXHOSTNAMELEN] = '\0';
 328                         (void) memmove(domain, cp + 1, strlen(cp + 1) + 1);
 329                 } else
 330                         domain[0] = 0;
 331         }
 332
 333         if (sa->sa_len == 0)
 334                 strlcpy(line, "default", sizeof(line));
 335         else switch (sa->sa_family) {
 336
 337         case AF_INET:
 338             {   struct in_addr in;
 339                 in = ((struct sockaddr_in *)sa)->sin_addr;
 340
 341                 cp = 0;
 342                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 343                         cp = "default";
 344                 if (cp == 0 && !nflag) {
 345                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 346                                 AF_INET);
 347                         if (hp) {
 348                                 if ((cp = index(hp->h_name, '.')) &&
 349                                     !strcmp(cp + 1, domain))
 350                                         *cp = 0;
 351                                 cp = hp->h_name;
 352                         }
 353                 }
 354                 if (cp) {
 355                         strncpy(line, cp, sizeof(line) - 1);
 356                         line[sizeof(line) - 1] = '\0';
 357                 } else {
 358                         /* XXX - why not inet_ntoa()? */
 359 #define C(x)    (unsigned)((x) & 0xff)
 360                         in.s_addr = ntohl(in.s_addr);
 361                         (void) snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
 362                            C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
 363                 }
 364                 break;
 365             }
 366
 367 #ifdef INET6
 368         case AF_INET6:
 369         {
 370                 struct sockaddr_in6 sin6; /* use static var for safety */
 371                 int niflags = 0;
 372 #ifdef NI_WITHSCOPEID
 373                 niflags = NI_WITHSCOPEID;
 374 #endif
 375
 376                 memset(&sin6, 0, sizeof(sin6));
 377                 memcpy(&sin6, sa, sa->sa_len);
 378                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 379                 sin6.sin6_family = AF_INET6;
 380 #ifdef __KAME__
 381                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 382                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 383                      IN6_IS_ADDR_MC_NODELOCAL(&sin6.sin6_addr) ||
 384                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 385                     sin6.sin6_scope_id == 0) {
 386                         sin6.sin6_scope_id =
 387                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 388                         sin6.sin6_addr.s6_addr[2] = 0;
 389                         sin6.sin6_addr.s6_addr[3] = 0;
 390                 }
 391 #endif
 392                 if (nflag)
 393                         niflags |= NI_NUMERICHOST;
 394                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 395                     line, sizeof(line), NULL, 0, niflags) != 0)
 396                         strncpy(line, "invalid", sizeof(line));
 397
 398                 return(line);
 399         }
 400 #endif
 401
 402         case AF_LINK:
 403                 return (link_ntoa((struct sockaddr_dl *)sa));
 404
 405         default:
 406             {   u_short *s = (u_short *)sa;
 407                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 408                 char *cp = line + snprintf(line, sizeof(line), "(%d)", sa->sa_family);
 409                 char *cpe = line + sizeof(line);
 410
 411                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 412                         cp += snprintf(cp, cpe - cp, " %x", *s);
 413                 break;
 414             }
 415         }
 416         return (line);
 417 }
 418
 419 /*
 420  * Return the name of the network whose address is given.
 421  * The address is assumed to be that of a net, not a host.
 422  */
 423 const char *
 424 netname(sa)
 425         struct sockaddr *sa;
 426 {
 427         char *cp = NULL;
 428         static char line[MAXHOSTNAMELEN + 1];
 429         struct netent *np = NULL;
 430         register in_addr_t i;
 431
 432         switch (sa->sa_family) {
 433
 434                 case AF_INET:
 435                    {   struct in_addr in;
 436                        in = ((struct sockaddr_in *)sa)->sin_addr;
 437
 438                        i = in.s_addr = ntohl(in.s_addr);
 439                        if (in.s_addr == 0)
 440                                cp = "default";
 441                        else if (!nflag) {
 442                                np = getnetbyaddr(i, AF_INET);
 443                                if (np != NULL)
 444                                        cp = np->n_name;
 445                        }
 446 #define C(x)    (unsigned)((x) & 0xff)
 447                        if (cp != NULL)
 448                                strncpy(line, cp, sizeof(line));
 449                        else if ((in.s_addr & 0xffffff) == 0)
 450                                (void) sprintf(line, "%u", C(in.s_addr >> 24));
 451                        else if ((in.s_addr & 0xffff) == 0)
 452                                (void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
 453                                                C(in.s_addr >> 16));
 454                        else if ((in.s_addr & 0xff) == 0)
 455                                (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 456                                                C(in.s_addr >> 16), C(in.s_addr >> 8));
 457                        else
 458                                (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 459                                                C(in.s_addr >> 16), C(in.s_addr >> 8),
 460                                                C(in.s_addr));
 461 #undef C
 462                        break;
 463                    }
 464 #ifdef INET6
 465         case AF_INET6:
 466         {
 467                 struct sockaddr_in6 sin6; /* use static var for safety */
 468                 int niflags = 0;
 469 #ifdef NI_WITHSCOPEID
 470                 niflags = NI_WITHSCOPEID;
 471 #endif
 472
 473                 memset(&sin6, 0, sizeof(sin6));
 474                 memcpy(&sin6, sa, sa->sa_len);
 475                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 476                 sin6.sin6_family = AF_INET6;
 477 #ifdef __KAME__
 478                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 479                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 480                      IN6_IS_ADDR_MC_NODELOCAL(&sin6.sin6_addr) ||
 481                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 482                     sin6.sin6_scope_id == 0) {
 483                         sin6.sin6_scope_id =
 484                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 485                         sin6.sin6_addr.s6_addr[2] = 0;
 486                         sin6.sin6_addr.s6_addr[3] = 0;
 487                 }
 488 #endif
 489                 if (nflag)
 490                         niflags |= NI_NUMERICHOST;
 491                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 492                     line, sizeof(line), NULL, 0, niflags) != 0)
 493                         strncpy(line, "invalid", sizeof(line));
 494
 495                 return(line);
 496         }
 497 #endif
 498
 499         case AF_LINK:
 500                 return (link_ntoa((struct sockaddr_dl *)sa));
 501
 502
 503         default:
 504             {   u_short *s = (u_short *)sa->sa_data;
 505                 u_short *slim = s + ((sa->sa_len + 1)>>1);
 506                 char *cp = line + snprintf(line, sizeof(line), "af %d:", sa->sa_family);
 507                 char *cpe = line + sizeof(line);
 508
 509                 while (s < slim && cp < cpe)
 510                         cp += snprintf(cp, cpe - cp, " %x", *s++);
 511                 break;
 512             }
 513         }
 514         return (line);
 515 }
 516
 517 static const char *
 518 route_strerror(int error)
 519 {
 520
 521         switch (error) {
 522         case ESRCH:
 523                 return "not in table";
 524         case EBUSY:
 525                 return "entry in use";
 526         case ENOBUFS:
 527                 return "routing table overflow";
 528         default:
 529                 return (strerror(error));
 530         }
 531 }
 532
 533 void
 534 set_metric(value, key)
 535         char *value;
 536         int key;
 537 {
 538         int flag = 0;
 539         u_int noval, *valp = &noval;
 540
 541         switch (key) {
 542 #define caseof(x, y, z) case x: valp = (u_int *)&rt_metrics.z; flag = y; break
 543         caseof(K_MTU, RTV_MTU, rmx_mtu);
 544         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 545         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 546         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 547         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 548         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 549         caseof(K_RTT, RTV_RTT, rmx_rtt);
 550         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 551         }
 552         rtm_inits |= flag;
 553         if (lockrest || locking)
 554                 rt_metrics.rmx_locks |= flag;
 555         if (locking)
 556                 locking = 0;
 557         *valp = atoi(value);
 558 }
 559
 560 void
 561 newroute(argc, argv)
 562         int argc;
 563         register char **argv;
 564 {
 565         char *cmd, *dest = "", *gateway = "";
 566         int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 567         int key;
 568         struct hostent *hp = 0;
 569
 570         if (uid) {
 571                 errx(EX_NOPERM, "must be root to alter routing table");
 572         }
 573         cmd = argv[0];
 574         if (*cmd != 'g')
 575                 shutdown(s, 0); /* Don't want to read back our messages */
 576         while (--argc > 0) {
 577                 if (**(++argv)== '-') {
 578                         switch (key = keyword(1 + *argv)) {
 579                         case K_LINK:
 580                                 af = AF_LINK;
 581                                 aflen = sizeof(struct sockaddr_dl);
 582                                 break;
 583                         case K_INET:
 584                                 af = AF_INET;
 585                                 aflen = sizeof(struct sockaddr_in);
 586                                 break;
 587 #ifdef INET6
 588                         case K_INET6:
 589                                 af = AF_INET6;
 590                                 aflen = sizeof(struct sockaddr_in6);
 591                                 break;
 592 #endif
 593                         case K_SA:
 594                                 af = PF_ROUTE;
 595                                 aflen = sizeof(union sockunion);
 596                                 break;
 597                         case K_IFACE:
 598                         case K_INTERFACE:
 599                                 iflag++;
 600                                 break;
 601                         case K_NOSTATIC:
 602                                 flags &= ~RTF_STATIC;
 603                                 break;
 604                         case K_LLINFO:
 605                                 flags |= RTF_LLINFO;
 606                                 break;
 607                         case K_LOCK:
 608                                 locking = 1;
 609                                 break;
 610                         case K_LOCKREST:
 611                                 lockrest = 1;
 612                                 break;
 613                         case K_HOST:
 614                                 forcehost++;
 615                                 break;
 616                         case K_REJECT:
 617                                 flags |= RTF_REJECT;
 618                                 break;
 619                         case K_BLACKHOLE:
 620                                 flags |= RTF_BLACKHOLE;
 621                                 break;
 622                         case K_PROTO1:
 623                                 flags |= RTF_PROTO1;
 624                                 break;
 625                         case K_PROTO2:
 626                                 flags |= RTF_PROTO2;
 627                                 break;
 628                         case K_CLONING:
 629                                 flags |= RTF_CLONING;
 630                                 break;
 631                         case K_XRESOLVE:
 632                                 flags |= RTF_XRESOLVE;
 633                                 break;
 634                         case K_STATIC:
 635                                 flags |= RTF_STATIC;
 636                                 break;
 637                         case K_IFA:
 638                                 if (!--argc)
 639                                         usage((char *)NULL);
 640                                 (void) getaddr(RTA_IFA, *++argv, 0);
 641                                 break;
 642                         case K_IFP:
 643                                 if (!--argc)
 644                                         usage((char *)NULL);
 645                                 (void) getaddr(RTA_IFP, *++argv, 0);
 646                                 break;
 647                         case K_GENMASK:
 648                                 if (!--argc)
 649                                         usage((char *)NULL);
 650                                 (void) getaddr(RTA_GENMASK, *++argv, 0);
 651                                 break;
 652                         case K_GATEWAY:
 653                                 if (!--argc)
 654                                         usage((char *)NULL);
 655                                 (void) getaddr(RTA_GATEWAY, *++argv, 0);
 656                                 break;
 657                         case K_DST:
 658                                 if (!--argc)
 659                                         usage((char *)NULL);
 660                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 661                                 dest = *argv;
 662                                 break;
 663                         case K_NETMASK:
 664                                 if (!--argc)
 665                                         usage((char *)NULL);
 666                                 (void) getaddr(RTA_NETMASK, *++argv, 0);
 667                                 /* FALLTHROUGH */
 668                         case K_NET:
 669                                 forcenet++;
 670                                 break;
 671                         case K_PREFIXLEN:
 672                                 if (!--argc)
 673                                         usage((char *)NULL);
 674                                 if (prefixlen(*++argv) == -1) {
 675                                         forcenet = 0;
 676                                         ishost = 1;
 677                                 } else {
 678                                         forcenet = 1;
 679                                         ishost = 0;
 680                                 }
 681                                 break;
 682                         case K_MTU:
 683                         case K_HOPCOUNT:
 684                         case K_EXPIRE:
 685                         case K_RECVPIPE:
 686                         case K_SENDPIPE:
 687                         case K_SSTHRESH:
 688                         case K_RTT:
 689                         case K_RTTVAR:
 690                                 if (!--argc)
 691                                         usage((char *)NULL);
 692                                 set_metric(*++argv, key);
 693                                 break;
 694                         case K_IFSCOPE:
 695                                 if (!--argc)
 696                                         usage((char *)NULL);
 697                                 if ((ifscope = if_nametoindex(*++argv)) != 0)
 698                                         flags |= RTF_IFSCOPE;
 699                                 else
 700                                         errx(1, "bad interface name");
 701                                 break;
 702                         default:
 703                                 usage(1+*argv);
 704                         }
 705                 } else {
 706                         if ((rtm_addrs & RTA_DST) == 0) {
 707                                 dest = *argv;
 708                                 ishost = getaddr(RTA_DST, *argv, &hp);
 709                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 710                                 gateway = *argv;
 711                                 (void) getaddr(RTA_GATEWAY, *argv, &hp);
 712                         } else {
 713                                 (void) getaddr(RTA_NETMASK, *argv, 0);
 714                         }
 715                 }
 716         }
 717         if (forcehost) {
 718                 ishost = 1;
 719 #ifdef INET6
 720                 if (af == AF_INET6) {
 721                         rtm_addrs &= ~RTA_NETMASK;
 722                         memset((void *)&so_mask, 0, sizeof(so_mask));
 723                 }
 724 #endif
 725         }
 726         if (forcenet)
 727                 ishost = 0;
 728         flags |= RTF_UP;
 729         if (ishost)
 730                 flags |= RTF_HOST;
 731         if (iflag == 0)
 732                 flags |= RTF_GATEWAY;
 733         if (so_mask.sin.sin_family == AF_INET) {
 734                 // make sure the mask is contiguous
 735                 long i;
 736                 for (i = 0; i < 32; i++)
 737                         if (((so_mask.sin.sin_addr.s_addr) & ntohl((1 << i))) != 0)
 738                                 break;
 739                 for (; i < 32; i++)
 740                         if (((so_mask.sin.sin_addr.s_addr) & ntohl((1 << i))) == 0)
 741                                 errx(EX_NOHOST, "invalid mask: %s", inet_ntoa(so_mask.sin.sin_addr));
 742         }
 743         for (attempts = 1; ; attempts++) {
 744                 errno = 0;
 745                 if ((ret = rtmsg(*cmd, flags)) == 0)
 746                         break;
 747                 if (errno != ENETUNREACH && errno != ESRCH)
 748                         break;
 749                 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 750                         hp->h_addr_list++;
 751                         bcopy(hp->h_addr_list[0], &so_gate.sin.sin_addr,
 752                             MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
 753                 } else
 754                         break;
 755         }
 756         if (*cmd == 'g')
 757                 exit(0);
 758         oerrno = errno;
 759         (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 760         if (*gateway) {
 761                 (void) printf(": gateway %s", gateway);
 762                 if (attempts > 1 && ret == 0 && af == AF_INET)
 763                     (void) printf(" (%s)", inet_ntoa(so_gate.sin.sin_addr));
 764         }
 765         if (ret == 0)
 766                 (void) printf("\n");
 767         else {
 768                 (void)printf(": %s\n", route_strerror(oerrno));
 769         }
 770 }
 771
 772 static void
 773 inet_makenetandmask(in_addr_t net, struct sockaddr_in *sin,
 774     struct sockaddr_in *sin_mask, in_addr_t bits)
 775 {
 776         in_addr_t mask = 0;
 777
 778         rtm_addrs |= RTA_NETMASK;
 779         /*
 780          * MSB of net should be meaningful. 0/0 is exception.
 781          */
 782         if (net > 0)
 783                 while ((net & 0xff000000) == 0)
 784                         net <<= 8;
 785
 786         /*
 787          * If no /xx was specified we must calculate the
 788          * CIDR address.
 789          */
 790         if ((bits == 0) && (net != 0)) {
 791                 u_long i, j;
 792
 793                 for(i = 0, j = 0xff; i < 4; i++)  {
 794                         if (net & j) {
 795                                 break;
 796                         }
 797                         j <<= 8;
 798                 }
 799                 /* i holds the first non zero bit */
 800                 bits = 32 - (i*8);
 801         }
 802         if (bits != 0)
 803                 mask = 0xffffffff << (32 - bits);
 804
 805         sin->sin_addr.s_addr = htonl(net);
 806         sin_mask->sin_addr.s_addr = htonl(mask);
 807         sin_mask->sin_len = sizeof(struct sockaddr_in);
 808         sin_mask->sin_family = AF_INET;
 809 }
 810
 811 #ifdef INET6
 812 /*
 813  * XXX the function may need more improvement...
 814  */
 815 static int
 816 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
 817 {
 818         struct in6_addr in6;
 819
 820         if (plen == NULL) {
 821                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 822                     sin6->sin6_scope_id == 0) {
 823                         plen = "0";
 824                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 825                         /* aggregatable global unicast - RFC2374 */
 826                         memset(&in6, 0, sizeof(in6));
 827                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
 828                                     &in6.s6_addr[8], 8))
 829                                 plen = "64";
 830                 }
 831         }
 832
 833         if (plen == NULL || strcmp(plen, "128") == 0)
 834                 return (1);
 835         rtm_addrs |= RTA_NETMASK;
 836         prefixlen(plen);
 837         return (0);
 838 }
 839 #endif
 840
 841 /*
 842  * Interpret an argument as a network address of some kind,
 843  * returning 1 if a host address, 0 if a network address.
 844  */
 845 int
 846 getaddr(which, s, hpp)
 847         int which;
 848         char *s;
 849         struct hostent **hpp;
 850 {
 851         register sup su = NULL;
 852         struct hostent *hp;
 853         struct netent *np;
 854         in_addr_t val;
 855         char *q;
 856         int afamily;  /* local copy of af so we can change it */
 857
 858         if (af == 0) {
 859                 af = AF_INET;
 860                 aflen = sizeof(struct sockaddr_in);
 861         }
 862         afamily = af;
 863         rtm_addrs |= which;
 864         switch (which) {
 865         case RTA_DST:
 866                 su = &so_dst;
 867                 break;
 868         case RTA_GATEWAY:
 869                 su = &so_gate;
 870                 if (iflag) {
 871                         struct ifaddrs *ifap, *ifa;
 872                         struct sockaddr_dl *sdl = NULL;
 873
 874                         if (getifaddrs(&ifap))
 875                                 err(1, "getifaddrs");
 876
 877                         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 878                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 879                                         continue;
 880
 881                                 if (strcmp(s, ifa->ifa_name))
 882                                         continue;
 883
 884                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 885                         }
 886                         /* If we found it, then use it */
 887                         if (sdl) {
 888                                 /*
 889                                  * Copy is safe since we have a
 890                                  * sockaddr_storage member in sockunion{}.
 891                                  * Note that we need to copy before calling
 892                                  * freeifaddrs().
 893                                  */
 894                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 895                         }
 896                         freeifaddrs(ifap);
 897                         if (sdl)
 898                                 return(1);
 899                 }
 900                 break;
 901         case RTA_NETMASK:
 902                 su = &so_mask;
 903                 break;
 904         case RTA_GENMASK:
 905                 su = &so_genmask;
 906                 break;
 907         case RTA_IFP:
 908                 su = &so_ifp;
 909                 afamily = AF_LINK;
 910                 break;
 911         case RTA_IFA:
 912                 su = &so_ifa;
 913                 break;
 914         default:
 915                 usage("internal error");
 916                 /*NOTREACHED*/
 917         }
 918         su->sa.sa_len = aflen;
 919         su->sa.sa_family = afamily; /* cases that don't want it have left already */
 920         if (strcmp(s, "default") == 0) {
 921                 /*
 922                  * Default is net 0.0.0.0/0
 923                  */
 924                 switch (which) {
 925                 case RTA_DST:
 926                         forcenet++;
 927                         /* bzero(su, sizeof(*su)); *//* for readability */
 928                         (void) getaddr(RTA_NETMASK, s, 0);
 929                         break;
 930                 case RTA_NETMASK:
 931                 case RTA_GENMASK:
 932                         /* bzero(su, sizeof(*su)); *//* for readability */
 933                         su->sa.sa_len = 0;
 934                         break;
 935                 }
 936                 return (0);
 937         }
 938         switch (afamily) {
 939 #ifdef INET6
 940         case AF_INET6:
 941         {
 942                 struct addrinfo hints, *res;
 943                 int ecode;
 944
 945                 q = NULL;
 946                 if (which == RTA_DST && (q = strchr(s, '/')) != NULL)
 947                         *q = '\0';
 948                 memset(&hints, 0, sizeof(hints));
 949                 hints.ai_family = afamily;      /*AF_INET6*/
 950                 hints.ai_flags = AI_NUMERICHOST;
 951                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
 952                 ecode = getaddrinfo(s, NULL, &hints, &res);
 953                 if (ecode != 0 || res->ai_family != AF_INET6 ||
 954                     res->ai_addrlen != sizeof(su->sin6)) {
 955                         (void) fprintf(stderr, "%s: %s\n", s,
 956                             gai_strerror(ecode));
 957                         exit(1);
 958                 }
 959                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
 960 #ifdef __KAME__
 961                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
 962                      IN6_IS_ADDR_MC_NODELOCAL(&su->sin6.sin6_addr) ||
 963                      IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) &&
 964                     su->sin6.sin6_scope_id) {
 965                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
 966                                 htons(su->sin6.sin6_scope_id);
 967                         su->sin6.sin6_scope_id = 0;
 968                 }
 969 #endif
 970                 freeaddrinfo(res);
 971                 if (hints.ai_flags == AI_NUMERICHOST) {
 972                         if (q != NULL)
 973                                 *q++ = '/';
 974                         if (which == RTA_DST)
 975                                 return (inet6_makenetandmask(&su->sin6, q));
 976                         return (0);
 977                 } else {
 978                         return (1);
 979                 }
 980         }
 981 #endif /* INET6 */
 982
 983         case AF_LINK:
 984                 link_addr(s, &su->sdl);
 985                 return (1);
 986
 987
 988         case PF_ROUTE:
 989                 su->sa.sa_len = sizeof(*su);
 990                 sockaddr(s, &su->sa);
 991                 return (1);
 992
 993         case AF_INET:
 994         default:
 995                 break;
 996         }
 997
 998         if (hpp == NULL)
 999                 hpp = &hp;
1000         *hpp = NULL;
1001
1002         q = strchr(s,'/');
1003         if (q && which == RTA_DST) {
1004                 *q = '\0';
1005                 if ((val = inet_network(s)) != INADDR_NONE) {
1006                         inet_makenetandmask(
1007                                 val, &su->sin, (struct sockaddr_in *)&so_mask,
1008                                 strtoul(q+1, 0, 0));
1009                         return (0);
1010                 }
1011                 *q = '/';
1012         }
1013         if ((which != RTA_DST || forcenet == 0) &&
1014             inet_aton(s, &su->sin.sin_addr)) {
1015                 val = su->sin.sin_addr.s_addr;
1016                 if (which != RTA_DST || forcehost ||
1017                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1018                         return (1);
1019                 else {
1020                         val = ntohl(val);
1021                         goto netdone;
1022                 }
1023         }
1024         if (which == RTA_DST && forcehost == 0 &&
1025             ((val = inet_network(s)) != INADDR_NONE ||
1026             ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
1027 netdone:
1028                 inet_makenetandmask(val, &su->sin, (struct sockaddr_in *)&so_mask, 0);
1029                 return (0);
1030         }
1031         hp = gethostbyname(s);
1032         if (hp) {
1033                 *hpp = hp;
1034                 su->sin.sin_family = hp->h_addrtype;
1035                 bcopy(hp->h_addr, (char *)&su->sin.sin_addr,
1036                     MIN(hp->h_length, sizeof(su->sin.sin_addr)));
1037                 return (1);
1038         }
1039         errx(EX_NOHOST, "bad address: %s", s);
1040 }
1041
1042 int
1043 prefixlen(s)
1044         char *s;
1045 {
1046         int len = atoi(s), q, r;
1047         int max;
1048         char *p;
1049
1050         rtm_addrs |= RTA_NETMASK;
1051         switch (af) {
1052 #ifdef INET6
1053         case AF_INET6:
1054                 max = 128;
1055                 p = (char *)&so_mask.sin6.sin6_addr;
1056                 break;
1057 #endif
1058         case AF_INET:
1059                 max = 32;
1060                 p = (char *)&so_mask.sin.sin_addr;
1061                 break;
1062         default:
1063                 (void) fprintf(stderr, "prefixlen not supported in this af\n");
1064                 exit(1);
1065                 /*NOTREACHED*/
1066         }
1067
1068         if (len < 0 || max < len) {
1069                 (void) fprintf(stderr, "%s: bad value\n", s);
1070                 exit(1);
1071         }
1072
1073         q = len >> 3;
1074         r = len & 7;
1075         so_mask.sa.sa_family = af;
1076         so_mask.sa.sa_len = aflen;
1077         memset((void *)p, 0, max / 8);
1078         if (q > 0)
1079                 memset((void *)p, 0xff, q);
1080         if (r > 0)
1081                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1082         if (len == max)
1083                 return -1;
1084         else
1085                 return len;
1086 }
1087
1088 void
1089 interfaces()
1090 {
1091         size_t needed;
1092         int mib[6];
1093         char *buf, *lim, *next;
1094         register struct rt_msghdr *rtm;
1095
1096         mib[0] = CTL_NET;
1097         mib[1] = PF_ROUTE;
1098         mib[2] = 0;             /* protocol */
1099         mib[3] = 0;             /* wildcard address family */
1100         mib[4] = NET_RT_IFLIST;
1101         mib[5] = 0;             /* no flags */
1102         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1103                 err(EX_OSERR, "route-sysctl-estimate");
1104         if ((buf = malloc(needed)) == NULL)
1105                 errx(EX_OSERR, "malloc failed");
1106         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1107                 err(EX_OSERR, "actual retrieval of interface table");
1108         lim = buf + needed;
1109         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1110                 rtm = (struct rt_msghdr *)next;
1111                 print_rtmsg(rtm, rtm->rtm_msglen);
1112         }
1113 }
1114
1115 void
1116 monitor()
1117 {
1118         int n;
1119         char msg[2048];
1120
1121         verbose = 1;
1122         if (debugonly) {
1123                 interfaces();
1124                 exit(0);
1125         }
1126         for(;;) {
1127                 time_t now;
1128                 n = read(s, msg, 2048);
1129                 now = time(NULL);
1130                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1131                 print_rtmsg((struct rt_msghdr *)msg, n);
1132         }
1133 }
1134
1135 struct {
1136         struct  rt_msghdr m_rtm;
1137         char    m_space[512];
1138 } m_rtmsg;
1139
1140 int
1141 rtmsg(cmd, flags)
1142         int cmd, flags;
1143 {
1144         static int seq;
1145         int rlen;
1146         register char *cp = m_rtmsg.m_space;
1147         register int l;
1148
1149 #define NEXTADDR(w, u) \
1150         if (rtm_addrs & (w)) {\
1151             l = ROUNDUP(u.sa.sa_len); bcopy((char *)&(u), cp, l); cp += l;\
1152             if (verbose) sodump(&(u),"u");\
1153         }
1154
1155         errno = 0;
1156         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
1157         if (cmd == 'a')
1158                 cmd = RTM_ADD;
1159         else if (cmd == 'c')
1160                 cmd = RTM_CHANGE;
1161         else if (cmd == 'g') {
1162                 cmd = RTM_GET;
1163                 if (so_ifp.sa.sa_family == 0) {
1164                         so_ifp.sa.sa_family = AF_LINK;
1165                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1166                         rtm_addrs |= RTA_IFP;
1167                 }
1168         } else
1169                 cmd = RTM_DELETE;
1170 #define rtm m_rtmsg.m_rtm
1171         rtm.rtm_type = cmd;
1172         rtm.rtm_flags = flags;
1173         rtm.rtm_version = RTM_VERSION;
1174         rtm.rtm_seq = ++seq;
1175         rtm.rtm_addrs = rtm_addrs;
1176         rtm.rtm_rmx = rt_metrics;
1177         rtm.rtm_inits = rtm_inits;
1178         rtm.rtm_index = ifscope;
1179
1180         if (rtm_addrs & RTA_NETMASK)
1181                 mask_addr();
1182         NEXTADDR(RTA_DST, so_dst);
1183         NEXTADDR(RTA_GATEWAY, so_gate);
1184         NEXTADDR(RTA_NETMASK, so_mask);
1185         NEXTADDR(RTA_GENMASK, so_genmask);
1186         NEXTADDR(RTA_IFP, so_ifp);
1187         NEXTADDR(RTA_IFA, so_ifa);
1188         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1189         if (verbose)
1190                 print_rtmsg(&rtm, l);
1191         if (debugonly)
1192                 return (0);
1193         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1194                 warnx("writing to routing socket: %s", route_strerror(errno));
1195                 return (-1);
1196         }
1197         if (cmd == RTM_GET) {
1198                 do {
1199                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1200                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1201                 if (l < 0)
1202                         warn("read from routing socket");
1203                 else
1204                         print_getmsg(&rtm, l);
1205         }
1206 #undef rtm
1207         return (0);
1208 }
1209
1210 void
1211 mask_addr()
1212 {
1213         int olen = so_mask.sa.sa_len;
1214         register char *cp1 = olen + (char *)&so_mask, *cp2;
1215
1216         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1217                 if (*--cp1 != 0) {
1218                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1219                         break;
1220                 }
1221         if ((rtm_addrs & RTA_DST) == 0)
1222                 return;
1223         switch (so_dst.sa.sa_family) {
1224         case AF_INET:
1225 #ifdef INET6
1226         case AF_INET6:
1227 #endif
1228         case AF_APPLETALK:
1229         case 0:
1230                 return;
1231         }
1232         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1233         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1234         while (cp2 > cp1)
1235                 *--cp2 = 0;
1236         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1237         while (cp1 > so_dst.sa.sa_data)
1238                 *--cp1 &= *--cp2;
1239 }
1240
1241 char *msgtypes[] = {
1242         "",
1243         "RTM_ADD: Add Route",
1244         "RTM_DELETE: Delete Route",
1245         "RTM_CHANGE: Change Metrics or flags",
1246         "RTM_GET: Report Metrics",
1247         "RTM_LOSING: Kernel Suspects Partitioning",
1248         "RTM_REDIRECT: Told to use different route",
1249         "RTM_MISS: Lookup failed on this address",
1250         "RTM_LOCK: fix specified metrics",
1251         "RTM_OLDADD: caused by SIOCADDRT",
1252         "RTM_OLDDEL: caused by SIOCDELRT",
1253         "RTM_RESOLVE: Route created by cloning",
1254         "RTM_NEWADDR: address being added to iface",
1255         "RTM_DELADDR: address being removed from iface",
1256         "RTM_IFINFO: iface status change",
1257         "RTM_NEWMADDR: new multicast group membership on iface",
1258         "RTM_DELMADDR: multicast group membership removed from iface",
1259         0,
1260 };
1261
1262 char metricnames[] =
1263 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1264 "\1mtu";
1265 char routeflags[] =
1266 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010DELCLONE"
1267 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1268 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024b024"
1269 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\031IFSCOPE\032CONDEMNED"
1270 "\033IFREF\034PROXY\035ROUTER";
1271 char ifnetflags[] =
1272 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1273 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1274 "\017LINK2\020MULTICAST";
1275 char addrnames[] =
1276 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1277
1278 void
1279 print_rtmsg(rtm, msglen)
1280         register struct rt_msghdr *rtm;
1281         int msglen;
1282 {
1283         struct if_msghdr *ifm;
1284         struct ifa_msghdr *ifam;
1285 #ifdef RTM_NEWMADDR
1286         struct ifma_msghdr *ifmam;
1287 #endif
1288
1289         if (verbose == 0)
1290                 return;
1291         if (rtm->rtm_version != RTM_VERSION) {
1292                 (void) printf("routing message version %d not understood\n",
1293                     rtm->rtm_version);
1294                 return;
1295         }
1296         (void)printf("%s: len %d, ", msgtypes[rtm->rtm_type], rtm->rtm_msglen);
1297         switch (rtm->rtm_type) {
1298         case RTM_IFINFO:
1299                 ifm = (struct if_msghdr *)rtm;
1300                 (void) printf("if# %d, flags:", ifm->ifm_index);
1301                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1302                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1303                 break;
1304         case RTM_NEWADDR:
1305         case RTM_DELADDR:
1306                 ifam = (struct ifa_msghdr *)rtm;
1307                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1308                 bprintf(stdout, ifam->ifam_flags, routeflags);
1309                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1310                 break;
1311 #ifdef RTM_NEWMADDR
1312         case RTM_NEWMADDR:
1313         case RTM_DELMADDR:
1314                 ifmam = (struct ifma_msghdr *)rtm;
1315                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1316                 break;
1317 #endif
1318         default:
1319                 (void) printf("pid: %ld, seq %d, errno %d, ",
1320                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1321                 if (rtm->rtm_flags & RTF_IFSCOPE)
1322                         (void) printf("ifscope %d, ", rtm->rtm_index);
1323                         if (rtm->rtm_flags & RTF_IFREF)
1324                         (void) printf("ifref, ");
1325                         (void) printf("flags:");
1326                 bprintf(stdout, rtm->rtm_flags, routeflags);
1327                 pmsg_common(rtm);
1328         }
1329 }
1330
1331 void
1332 print_getmsg(rtm, msglen)
1333         register struct rt_msghdr *rtm;
1334         int msglen;
1335 {
1336         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1337         struct sockaddr_dl *ifp = NULL;
1338         register struct sockaddr *sa;
1339         register char *cp;
1340         register int i;
1341
1342         (void) printf("   route to: %s\n", routename(&so_dst.sa));
1343         if (rtm->rtm_version != RTM_VERSION) {
1344                 warnx("routing message version %d not understood",
1345                      rtm->rtm_version);
1346                 return;
1347         }
1348         if (rtm->rtm_msglen > msglen) {
1349                 warnx("message length mismatch, in packet %d, returned %d",
1350                       rtm->rtm_msglen, msglen);
1351         }
1352         if (rtm->rtm_errno)  {
1353                 errno = rtm->rtm_errno;
1354                 warn("message indicates error %d", errno);
1355                 return;
1356         }
1357         cp = ((char *)(rtm + 1));
1358         if (rtm->rtm_addrs)
1359                 for (i = 1; i; i <<= 1)
1360                         if (i & rtm->rtm_addrs) {
1361                                 sa = (struct sockaddr *)cp;
1362                                 switch (i) {
1363                                 case RTA_DST:
1364                                         dst = sa;
1365                                         break;
1366                                 case RTA_GATEWAY:
1367                                         gate = sa;
1368                                         break;
1369                                 case RTA_NETMASK:
1370                                         mask = sa;
1371                                         break;
1372                                 case RTA_IFP:
1373                                         if (sa->sa_family == AF_LINK &&
1374                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1375                                                 ifp = (struct sockaddr_dl *)sa;
1376                                         break;
1377                                 }
1378                                 ADVANCE(cp, sa);
1379                         }
1380         if (dst && mask)
1381                 mask->sa_family = dst->sa_family;       /* XXX */
1382         if (dst)
1383                 (void)printf("destination: %s\n", routename(dst));
1384         if (mask) {
1385                 int savenflag = nflag;
1386
1387                 nflag = 1;
1388                 (void)printf("       mask: %s\n", routename(mask));
1389                 nflag = savenflag;
1390         }
1391         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1392                 (void)printf("    gateway: %s\n", routename(gate));
1393         if (ifp)
1394                 (void)printf("  interface: %.*s\n",
1395                     ifp->sdl_nlen, ifp->sdl_data);
1396         (void)printf("      flags: ");
1397         bprintf(stdout, rtm->rtm_flags, routeflags);
1398
1399 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1400 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1401
1402         (void) printf("\n%s\n", "\
1403  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
1404         printf("%8u%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1405         printf("%8u%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1406         printf("%8u%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1407         printf("%8u%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1408         printf("%8u%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1409         printf("%8u%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1410         printf("%8u%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1411         if (rtm->rtm_rmx.rmx_expire)
1412                 rtm->rtm_rmx.rmx_expire -= time(0);
1413         printf("%8d%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1414 #undef lock
1415 #undef msec
1416 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1417         if (verbose)
1418                 pmsg_common(rtm);
1419         else if (rtm->rtm_addrs &~ RTA_IGN) {
1420                 (void) printf("sockaddrs: ");
1421                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1422                 putchar('\n');
1423         }
1424 #undef  RTA_IGN
1425 }
1426
1427 void
1428 pmsg_common(rtm)
1429         register struct rt_msghdr *rtm;
1430 {
1431         (void) printf("\nlocks: ");
1432         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1433         (void) printf(" inits: ");
1434         bprintf(stdout, rtm->rtm_inits, metricnames);
1435         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1436 }
1437
1438 void
1439 pmsg_addrs(cp, addrs)
1440         char    *cp;
1441         int     addrs;
1442 {
1443         register struct sockaddr *sa;
1444         int i;
1445
1446         if (addrs == 0) {
1447                 (void) putchar('\n');
1448                 return;
1449         }
1450         (void) printf("\nsockaddrs: ");
1451         bprintf(stdout, addrs, addrnames);
1452         (void) putchar('\n');
1453         for (i = 1; i; i <<= 1)
1454                 if (i & addrs) {
1455                         sa = (struct sockaddr *)cp;
1456                         (void) printf(" %s", routename(sa));
1457                         ADVANCE(cp, sa);
1458                 }
1459         (void) putchar('\n');
1460         (void) fflush(stdout);
1461 }
1462
1463 void
1464 bprintf(fp, b, s)
1465         register FILE *fp;
1466         register int b;
1467         register u_char *s;
1468 {
1469         register int i;
1470         int gotsome = 0;
1471
1472         if (b == 0)
1473                 return;
1474         while ((i = *s++) != 0) {
1475                 if (b & (1 << (i-1))) {
1476                         if (gotsome == 0)
1477                                 i = '<';
1478                         else
1479                                 i = ',';
1480                         (void) putc(i, fp);
1481                         gotsome = 1;
1482                         for (; (i = *s) > 32; s++)
1483                                 (void) putc(i, fp);
1484                 } else
1485                         while (*s > 32)
1486                                 s++;
1487         }
1488         if (gotsome)
1489                 (void) putc('>', fp);
1490 }
1491
1492 int
1493 keyword(cp)
1494         char *cp;
1495 {
1496         register struct keytab *kt = keywords;
1497
1498         while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1499                 kt++;
1500         return kt->kt_i;
1501 }
1502
1503 void
1504 sodump(su, which)
1505         register sup su;
1506         char *which;
1507 {
1508         switch (su->sa.sa_family) {
1509         case AF_LINK:
1510                 (void) printf("%s: link %s; ",
1511                     which, link_ntoa(&su->sdl));
1512                 break;
1513         case AF_INET:
1514                 (void) printf("%s: inet %s; ",
1515                     which, inet_ntoa(su->sin.sin_addr));
1516                 break;
1517         }
1518         (void) fflush(stdout);
1519 }
1520
1521 /* States*/
1522 #define VIRGIN  0
1523 #define GOTONE  1
1524 #define GOTTWO  2
1525 /* Inputs */
1526 #define DIGIT   (4*0)
1527 #define END     (4*1)
1528 #define DELIM   (4*2)
1529
1530 void
1531 sockaddr(addr, sa)
1532         register char *addr;
1533         register struct sockaddr *sa;
1534 {
1535         register char *cp = (char *)sa;
1536         int size = sa->sa_len;
1537         char *cplim = cp + size;
1538         register int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1539
1540         bzero(cp, size);
1541         cp++;
1542         do {
1543                 if ((*addr >= '0') && (*addr <= '9')) {
1544                         new = *addr - '0';
1545                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1546                         new = *addr - 'a' + 10;
1547                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1548                         new = *addr - 'A' + 10;
1549                 } else if (*addr == 0)
1550                         state |= END;
1551                 else
1552                         state |= DELIM;
1553                 addr++;
1554                 switch (state /* | INPUT */) {
1555                 case GOTTWO | DIGIT:
1556                         *cp++ = byte; /*FALLTHROUGH*/
1557                 case VIRGIN | DIGIT:
1558                         state = GOTONE; byte = new; continue;
1559                 case GOTONE | DIGIT:
1560                         state = GOTTWO; byte = new + (byte << 4); continue;
1561                 default: /* | DELIM */
1562                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1563                 case GOTONE | END:
1564                 case GOTTWO | END:
1565                         *cp++ = byte; /* FALLTHROUGH */
1566                 case VIRGIN | END:
1567                         break;
1568                 }
1569                 break;
1570         } while (cp < cplim);
1571         sa->sa_len = cp - (char *)sa;
1572 }