sbin/route/route.c

   1 /*
   2  * Copyright (c) 1983, 1989, 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef lint
  31 static const char copyright[] =
  32 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\
  33         The Regents of the University of California.  All rights reserved.\n";
  34 #endif /* not lint */
  35
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)route.c     8.6 (Berkeley) 4/28/95";
  39 #endif
  40 #endif /* not lint */
  41
  42 #include <sys/cdefs.h>
  43 __FBSDID("$FreeBSD$");
  44
  45 #include <sys/param.h>
  46 #include <sys/file.h>
  47 #include <sys/socket.h>
  48 #include <sys/ioctl.h>
  49 #include <sys/sysctl.h>
  50 #include <sys/types.h>
  51
  52 #include <net/if.h>
  53 #include <net/route.h>
  54 #include <net/if_dl.h>
  55 #include <netinet/in.h>
  56 #include <netinet/if_ether.h>
  57 #include <netatalk/at.h>
  58 #include <arpa/inet.h>
  59 #include <netdb.h>
  60
  61 #include <ctype.h>
  62 #include <err.h>
  63 #include <errno.h>
  64 #include <paths.h>
  65 #include <stdio.h>
  66 #include <stdlib.h>
  67 #include <string.h>
  68 #include <sysexits.h>
  69 #include <unistd.h>
  70 #include <ifaddrs.h>
  71
  72 struct keytab {
  73         const char      *kt_cp;
  74         int     kt_i;
  75 } keywords[] = {
  76 #include "keywords.h"
  77         {0, 0}
  78 };
  79
  80 struct  ortentry route;
  81 union   sockunion {
  82         struct  sockaddr sa;
  83         struct  sockaddr_in sin;
  84 #ifdef INET6
  85         struct  sockaddr_in6 sin6;
  86 #endif
  87         struct  sockaddr_at sat;
  88         struct  sockaddr_dl sdl;
  89         struct  sockaddr_inarp sinarp;
  90         struct  sockaddr_storage ss; /* added to avoid memory overrun */
  91 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
  92
  93 typedef union sockunion *sup;
  94 int     pid, rtm_addrs;
  95 int     s;
  96 int     forcehost, forcenet, doflush, nflag, af, qflag, tflag;
  97 int     iflag, verbose, aflen = sizeof (struct sockaddr_in);
  98 int     locking, lockrest, debugonly;
  99 struct  rt_metrics rt_metrics;
 100 u_long  rtm_inits;
 101 uid_t   uid;
 102
 103 static int      atalk_aton(const char *, struct at_addr *);
 104 static char     *atalk_ntoa(struct at_addr);
 105 static void     bprintf(FILE *, int, u_char *);
 106 static void     flushroutes(int argc, char *argv[]);
 107 static int      getaddr(int, char *, struct hostent **);
 108 static int      keyword(const char *);
 109 static void     inet_makenetandmask(u_long, struct sockaddr_in *, u_long);
 110 #ifdef INET6
 111 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *);
 112 #endif
 113 static void     interfaces(void);
 114 static void     mask_addr(void);
 115 static void     monitor(void);
 116 static const char       *netname(struct sockaddr *);
 117 static void     newroute(int, char **);
 118 static void     pmsg_addrs(char *, int, size_t);
 119 static void     pmsg_common(struct rt_msghdr *, size_t);
 120 static int      prefixlen(const char *);
 121 static void     print_getmsg(struct rt_msghdr *, int);
 122 static void     print_rtmsg(struct rt_msghdr *, size_t);
 123 static const char       *routename(struct sockaddr *);
 124 static int      rtmsg(int, int);
 125 static void     set_metric(char *, int);
 126 static void     sockaddr(char *, struct sockaddr *);
 127 static void     sodump(sup, const char *);
 128 extern  char *iso_ntoa(void);
 129
 130 static void usage(const char *) __dead2;
 131
 132 void
 133 usage(const char *cp)
 134 {
 135         if (cp != NULL)
 136                 warnx("bad keyword: %s", cp);
 137         (void) fprintf(stderr,
 138             "usage: route [-dnqtv] command [[modifiers] args]\n");
 139         exit(EX_USAGE);
 140         /* NOTREACHED */
 141 }
 142
 143 int
 144 main(int argc, char **argv)
 145 {
 146         int ch;
 147
 148         if (argc < 2)
 149                 usage(NULL);
 150
 151         while ((ch = getopt(argc, argv, "nqdtv")) != -1)
 152                 switch(ch) {
 153                 case 'n':
 154                         nflag = 1;
 155                         break;
 156                 case 'q':
 157                         qflag = 1;
 158                         break;
 159                 case 'v':
 160                         verbose = 1;
 161                         break;
 162                 case 't':
 163                         tflag = 1;
 164                         break;
 165                 case 'd':
 166                         debugonly = 1;
 167                         break;
 168                 case '?':
 169                 default:
 170                         usage(NULL);
 171                 }
 172         argc -= optind;
 173         argv += optind;
 174
 175         pid = getpid();
 176         uid = geteuid();
 177         if (tflag)
 178                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 179         else
 180                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 181         if (s < 0)
 182                 err(EX_OSERR, "socket");
 183         if (*argv != NULL)
 184                 switch (keyword(*argv)) {
 185                 case K_GET:
 186                 case K_SHOW:
 187                         uid = 0;
 188                         /* FALLTHROUGH */
 189
 190                 case K_CHANGE:
 191                 case K_ADD:
 192                 case K_DEL:
 193                 case K_DELETE:
 194                         newroute(argc, argv);
 195                         /* NOTREACHED */
 196
 197                 case K_MONITOR:
 198                         monitor();
 199                         /* NOTREACHED */
 200
 201                 case K_FLUSH:
 202                         flushroutes(argc, argv);
 203                         exit(0);
 204                         /* NOTREACHED */
 205                 }
 206         usage(*argv);
 207         /* NOTREACHED */
 208 }
 209
 210 /*
 211  * Purge all entries in the routing tables not
 212  * associated with network interfaces.
 213  */
 214 static void
 215 flushroutes(int argc, char *argv[])
 216 {
 217         size_t needed;
 218         int mib[6], rlen, seqno, count = 0;
 219         char *buf, *next, *lim;
 220         struct rt_msghdr *rtm;
 221
 222         if (uid != 0 && !debugonly) {
 223                 errx(EX_NOPERM, "must be root to alter routing table");
 224         }
 225         shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 226         if (argc > 1) {
 227                 argv++;
 228                 if (argc == 2 && **argv == '-')
 229                     switch (keyword(*argv + 1)) {
 230                         case K_INET:
 231                                 af = AF_INET;
 232                                 break;
 233 #ifdef INET6
 234                         case K_INET6:
 235                                 af = AF_INET6;
 236                                 break;
 237 #endif
 238                         case K_ATALK:
 239                                 af = AF_APPLETALK;
 240                                 break;
 241                         case K_LINK:
 242                                 af = AF_LINK;
 243                                 break;
 244                         default:
 245                                 goto bad;
 246                 } else
 247 bad:                    usage(*argv);
 248         }
 249 retry:
 250         mib[0] = CTL_NET;
 251         mib[1] = PF_ROUTE;
 252         mib[2] = 0;             /* protocol */
 253         mib[3] = 0;             /* wildcard address family */
 254         mib[4] = NET_RT_DUMP;
 255         mib[5] = 0;             /* no flags */
 256         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 257                 err(EX_OSERR, "route-sysctl-estimate");
 258         if ((buf = malloc(needed)) == NULL)
 259                 errx(EX_OSERR, "malloc failed");
 260         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
 261                 if (errno == ENOMEM && count++ < 10) {
 262                         warnx("Routing table grew, retrying");
 263                         sleep(1);
 264                         free(buf);
 265                         goto retry;
 266                 }
 267                 err(EX_OSERR, "route-sysctl-get");
 268         }
 269         lim = buf + needed;
 270         if (verbose)
 271                 (void) printf("Examining routing table from sysctl\n");
 272         seqno = 0;              /* ??? */
 273         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 274                 rtm = (struct rt_msghdr *)next;
 275                 if (verbose)
 276                         print_rtmsg(rtm, rtm->rtm_msglen);
 277                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 278                         continue;
 279                 if (af != 0) {
 280                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 281
 282                         if (sa->sa_family != af)
 283                                 continue;
 284                 }
 285                 if (debugonly)
 286                         continue;
 287                 rtm->rtm_type = RTM_DELETE;
 288                 rtm->rtm_seq = seqno;
 289                 rlen = write(s, next, rtm->rtm_msglen);
 290                 if (rlen < 0 && errno == EPERM)
 291                         err(1, "write to routing socket");
 292                 if (rlen < (int)rtm->rtm_msglen) {
 293                         warn("write to routing socket");
 294                         (void) printf("got only %d for rlen\n", rlen);
 295                         free(buf);
 296                         goto retry;
 297                         break;
 298                 }
 299                 seqno++;
 300                 if (qflag)
 301                         continue;
 302                 if (verbose)
 303                         print_rtmsg(rtm, rlen);
 304                 else {
 305                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 306                         (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 307                             routename(sa) : netname(sa));
 308                         sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
 309                         (void) printf("%-20.20s ", routename(sa));
 310                         (void) printf("done\n");
 311                 }
 312         }
 313 }
 314
 315 const char *
 316 routename(struct sockaddr *sa)
 317 {
 318         const char *cp;
 319         static char line[MAXHOSTNAMELEN + 1];
 320         struct hostent *hp;
 321         static char domain[MAXHOSTNAMELEN + 1];
 322         static int first = 1, n;
 323
 324         if (first) {
 325                 first = 0;
 326                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 327                     (cp = strchr(domain, '.'))) {
 328                         domain[MAXHOSTNAMELEN] = '\0';
 329                         (void) strcpy(domain, cp + 1);
 330                 } else
 331                         domain[0] = 0;
 332         }
 333
 334         if (sa->sa_len == 0)
 335                 strcpy(line, "default");
 336         else switch (sa->sa_family) {
 337
 338         case AF_INET:
 339             {   struct in_addr in;
 340                 in = ((struct sockaddr_in *)sa)->sin_addr;
 341
 342                 cp = NULL;
 343                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 344                         cp = "default";
 345                 if (cp == NULL && !nflag) {
 346                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 347                                 AF_INET);
 348                         if (hp != NULL) {
 349                                 char *cptr;
 350                                 cptr = strchr(hp->h_name, '.');
 351                                 if (cptr != NULL &&
 352                                     strcmp(cptr + 1, domain) == 0)
 353                                         *cptr = '\0';
 354                                 cp = hp->h_name;
 355                         }
 356                 }
 357                 if (cp != NULL) {
 358                         strncpy(line, cp, sizeof(line) - 1);
 359                         line[sizeof(line) - 1] = '\0';
 360                 } else
 361                         (void) sprintf(line, "%s", inet_ntoa(in));
 362                 break;
 363             }
 364
 365 #ifdef INET6
 366         case AF_INET6:
 367         {
 368                 struct sockaddr_in6 sin6; /* use static var for safety */
 369                 int niflags = 0;
 370
 371                 memset(&sin6, 0, sizeof(sin6));
 372                 memcpy(&sin6, sa, sa->sa_len);
 373                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 374                 sin6.sin6_family = AF_INET6;
 375 #ifdef __KAME__
 376                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 377                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 378                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 379                     sin6.sin6_scope_id == 0) {
 380                         sin6.sin6_scope_id =
 381                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 382                         sin6.sin6_addr.s6_addr[2] = 0;
 383                         sin6.sin6_addr.s6_addr[3] = 0;
 384                 }
 385 #endif
 386                 if (nflag)
 387                         niflags |= NI_NUMERICHOST;
 388                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 389                     line, sizeof(line), NULL, 0, niflags) != 0)
 390                         strncpy(line, "invalid", sizeof(line));
 391
 392                 return(line);
 393         }
 394 #endif
 395
 396         case AF_APPLETALK:
 397                 (void) snprintf(line, sizeof(line), "atalk %s",
 398                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 399                 break;
 400
 401         case AF_LINK:
 402                 return (link_ntoa((struct sockaddr_dl *)sa));
 403
 404         default:
 405             {
 406                 u_short *sp = (u_short *)sa;
 407                 u_short *splim = sp + ((sa->sa_len + 1) >> 1);
 408                 char *cps = line + sprintf(line, "(%d)", sa->sa_family);
 409                 char *cpe = line + sizeof(line);
 410
 411                 while (++sp < splim && cps < cpe) /* start with sa->sa_data */
 412                         if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0)
 413                                 cps += n;
 414                         else
 415                                 *cps = '\0';
 416                 break;
 417             }
 418         }
 419         return (line);
 420 }
 421
 422 /*
 423  * Return the name of the network whose address is given.
 424  * The address is assumed to be that of a net or subnet, not a host.
 425  */
 426 const char *
 427 netname(struct sockaddr *sa)
 428 {
 429         const char *cp = NULL;
 430         static char line[MAXHOSTNAMELEN + 1];
 431         struct netent *np = NULL;
 432         u_long net, mask;
 433         u_long i;
 434         int n, subnetshift;
 435
 436         switch (sa->sa_family) {
 437
 438         case AF_INET:
 439             {   struct in_addr in;
 440                 in = ((struct sockaddr_in *)sa)->sin_addr;
 441
 442                 i = in.s_addr = ntohl(in.s_addr);
 443                 if (in.s_addr == 0)
 444                         cp = "default";
 445                 else if (!nflag) {
 446                         if (IN_CLASSA(i)) {
 447                                 mask = IN_CLASSA_NET;
 448                                 subnetshift = 8;
 449                         } else if (IN_CLASSB(i)) {
 450                                 mask = IN_CLASSB_NET;
 451                                 subnetshift = 8;
 452                         } else {
 453                                 mask = IN_CLASSC_NET;
 454                                 subnetshift = 4;
 455                         }
 456                         /*
 457                          * If there are more bits than the standard mask
 458                          * would suggest, subnets must be in use.
 459                          * Guess at the subnet mask, assuming reasonable
 460                          * width subnet fields.
 461                          */
 462                         while (in.s_addr &~ mask)
 463                                 mask = (long)mask >> subnetshift;
 464                         net = in.s_addr & mask;
 465                         while ((mask & 1) == 0)
 466                                 mask >>= 1, net >>= 1;
 467                         np = getnetbyaddr(net, AF_INET);
 468                         if (np != NULL)
 469                                 cp = np->n_name;
 470                 }
 471 #define C(x)    (unsigned)((x) & 0xff)
 472                 if (cp != NULL)
 473                         strncpy(line, cp, sizeof(line));
 474                 else if ((in.s_addr & 0xffffff) == 0)
 475                         (void) sprintf(line, "%u", C(in.s_addr >> 24));
 476                 else if ((in.s_addr & 0xffff) == 0)
 477                         (void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
 478                             C(in.s_addr >> 16));
 479                 else if ((in.s_addr & 0xff) == 0)
 480                         (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 481                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 482                 else
 483                         (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 484                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 485                             C(in.s_addr));
 486 #undef C
 487                 break;
 488             }
 489
 490 #ifdef INET6
 491         case AF_INET6:
 492         {
 493                 struct sockaddr_in6 sin6; /* use static var for safety */
 494                 int niflags = 0;
 495
 496                 memset(&sin6, 0, sizeof(sin6));
 497                 memcpy(&sin6, sa, sa->sa_len);
 498                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 499                 sin6.sin6_family = AF_INET6;
 500 #ifdef __KAME__
 501                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 502                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 503                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 504                     sin6.sin6_scope_id == 0) {
 505                         sin6.sin6_scope_id =
 506                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 507                         sin6.sin6_addr.s6_addr[2] = 0;
 508                         sin6.sin6_addr.s6_addr[3] = 0;
 509                 }
 510 #endif
 511                 if (nflag)
 512                         niflags |= NI_NUMERICHOST;
 513                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 514                     line, sizeof(line), NULL, 0, niflags) != 0)
 515                         strncpy(line, "invalid", sizeof(line));
 516
 517                 return(line);
 518         }
 519 #endif
 520
 521         case AF_APPLETALK:
 522                 (void) snprintf(line, sizeof(line), "atalk %s",
 523                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 524                 break;
 525
 526         case AF_LINK:
 527                 return (link_ntoa((struct sockaddr_dl *)sa));
 528
 529
 530         default:
 531             {
 532                 u_short *sp = (u_short *)sa->sa_data;
 533                 u_short *splim = sp + ((sa->sa_len + 1)>>1);
 534                 char *cps = line + sprintf(line, "af %d:", sa->sa_family);
 535                 char *cpe = line + sizeof(line);
 536
 537                 while (sp < splim && cps < cpe)
 538                         if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0)
 539                                 cps += n;
 540                         else
 541                                 *cps = '\0';
 542                 break;
 543             }
 544         }
 545         return (line);
 546 }
 547
 548 static void
 549 set_metric(char *value, int key)
 550 {
 551         int flag = 0;
 552         u_long noval, *valp = &noval;
 553
 554         switch (key) {
 555 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 556         caseof(K_MTU, RTV_MTU, rmx_mtu);
 557         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 558         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 559         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 560         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 561         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 562         caseof(K_RTT, RTV_RTT, rmx_rtt);
 563         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 564         caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight);
 565         }
 566         rtm_inits |= flag;
 567         if (lockrest || locking)
 568                 rt_metrics.rmx_locks |= flag;
 569         if (locking)
 570                 locking = 0;
 571         *valp = atoi(value);
 572 }
 573
 574 static void
 575 newroute(int argc, char **argv)
 576 {
 577         char *cmd;
 578         const char *dest = "", *gateway = "", *errmsg;
 579         int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 580         int key;
 581         struct hostent *hp = 0;
 582
 583         if (uid != 0) {
 584                 errx(EX_NOPERM, "must be root to alter routing table");
 585         }
 586         cmd = argv[0];
 587         if (*cmd != 'g' && *cmd != 's')
 588                 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 589
 590         while (--argc > 0) {
 591                 if (**(++argv)== '-') {
 592                         switch (key = keyword(1 + *argv)) {
 593                         case K_LINK:
 594                                 af = AF_LINK;
 595                                 aflen = sizeof(struct sockaddr_dl);
 596                                 break;
 597                         case K_INET:
 598                                 af = AF_INET;
 599                                 aflen = sizeof(struct sockaddr_in);
 600                                 break;
 601 #ifdef INET6
 602                         case K_INET6:
 603                                 af = AF_INET6;
 604                                 aflen = sizeof(struct sockaddr_in6);
 605                                 break;
 606 #endif
 607                         case K_ATALK:
 608                                 af = AF_APPLETALK;
 609                                 aflen = sizeof(struct sockaddr_at);
 610                                 break;
 611                         case K_SA:
 612                                 af = PF_ROUTE;
 613                                 aflen = sizeof(union sockunion);
 614                                 break;
 615                         case K_IFACE:
 616                         case K_INTERFACE:
 617                                 iflag++;
 618                                 break;
 619                         case K_NOSTATIC:
 620                                 flags &= ~RTF_STATIC;
 621                                 break;
 622                         case K_LOCK:
 623                                 locking = 1;
 624                                 break;
 625                         case K_LOCKREST:
 626                                 lockrest = 1;
 627                                 break;
 628                         case K_HOST:
 629                                 forcehost++;
 630                                 break;
 631                         case K_REJECT:
 632                                 flags |= RTF_REJECT;
 633                                 break;
 634                         case K_BLACKHOLE:
 635                                 flags |= RTF_BLACKHOLE;
 636                                 break;
 637                         case K_PROTO1:
 638                                 flags |= RTF_PROTO1;
 639                                 break;
 640                         case K_PROTO2:
 641                                 flags |= RTF_PROTO2;
 642                                 break;
 643                         case K_PROXY:
 644                                 proxy = 1;
 645                                 break;
 646                         case K_XRESOLVE:
 647                                 flags |= RTF_XRESOLVE;
 648                                 break;
 649                         case K_STATIC:
 650                                 flags |= RTF_STATIC;
 651                                 break;
 652                         case K_STICKY:
 653                                 flags |= RTF_STICKY;
 654                                 break;
 655                         case K_NOSTICK:
 656                                 flags &= ~RTF_STICKY;
 657                                 break;
 658                         case K_IFA:
 659                                 if (!--argc)
 660                                         usage(NULL);
 661                                 (void) getaddr(RTA_IFA, *++argv, 0);
 662                                 break;
 663                         case K_IFP:
 664                                 if (!--argc)
 665                                         usage(NULL);
 666                                 (void) getaddr(RTA_IFP, *++argv, 0);
 667                                 break;
 668                         case K_GENMASK:
 669                                 if (!--argc)
 670                                         usage(NULL);
 671                                 (void) getaddr(RTA_GENMASK, *++argv, 0);
 672                                 break;
 673                         case K_GATEWAY:
 674                                 if (!--argc)
 675                                         usage(NULL);
 676                                 (void) getaddr(RTA_GATEWAY, *++argv, 0);
 677                                 break;
 678                         case K_DST:
 679                                 if (!--argc)
 680                                         usage(NULL);
 681                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 682                                 dest = *argv;
 683                                 break;
 684                         case K_NETMASK:
 685                                 if (!--argc)
 686                                         usage(NULL);
 687                                 (void) getaddr(RTA_NETMASK, *++argv, 0);
 688                                 /* FALLTHROUGH */
 689                         case K_NET:
 690                                 forcenet++;
 691                                 break;
 692                         case K_PREFIXLEN:
 693                                 if (!--argc)
 694                                         usage(NULL);
 695                                 if (prefixlen(*++argv) == -1) {
 696                                         forcenet = 0;
 697                                         ishost = 1;
 698                                 } else {
 699                                         forcenet = 1;
 700                                         ishost = 0;
 701                                 }
 702                                 break;
 703                         case K_MTU:
 704                         case K_HOPCOUNT:
 705                         case K_EXPIRE:
 706                         case K_RECVPIPE:
 707                         case K_SENDPIPE:
 708                         case K_SSTHRESH:
 709                         case K_RTT:
 710                         case K_RTTVAR:
 711                         case K_WEIGHT:
 712                                 if (!--argc)
 713                                         usage(NULL);
 714                                 set_metric(*++argv, key);
 715                                 break;
 716                         default:
 717                                 usage(1+*argv);
 718                         }
 719                 } else {
 720                         if ((rtm_addrs & RTA_DST) == 0) {
 721                                 dest = *argv;
 722                                 ishost = getaddr(RTA_DST, *argv, &hp);
 723                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 724                                 gateway = *argv;
 725                                 (void) getaddr(RTA_GATEWAY, *argv, &hp);
 726                         } else {
 727                                 (void) getaddr(RTA_NETMASK, *argv, 0);
 728                                 forcenet = 1;
 729                         }
 730                 }
 731         }
 732         if (forcehost) {
 733                 ishost = 1;
 734 #ifdef INET6
 735                 if (af == AF_INET6) {
 736                         rtm_addrs &= ~RTA_NETMASK;
 737                         memset((void *)&so_mask, 0, sizeof(so_mask));
 738                 }
 739 #endif
 740         }
 741         if (forcenet)
 742                 ishost = 0;
 743         flags |= RTF_UP;
 744         if (ishost)
 745                 flags |= RTF_HOST;
 746         if (iflag == 0)
 747                 flags |= RTF_GATEWAY;
 748         if (proxy) {
 749                 so_dst.sinarp.sin_other = SIN_PROXY;
 750                 flags |= RTF_ANNOUNCE;
 751         }
 752         for (attempts = 1; ; attempts++) {
 753                 errno = 0;
 754                 if ((ret = rtmsg(*cmd, flags)) == 0)
 755                         break;
 756                 if (errno != ENETUNREACH && errno != ESRCH)
 757                         break;
 758                 if (af == AF_INET && *gateway != '\0' &&
 759                     hp != NULL && hp->h_addr_list[1] != NULL) {
 760                         hp->h_addr_list++;
 761                         memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0],
 762                             MIN((size_t)hp->h_length,
 763                             sizeof(so_gate.sin.sin_addr)));
 764                 } else
 765                         break;
 766         }
 767         if (*cmd == 'g' || *cmd == 's')
 768                 exit(ret != 0);
 769         if (!qflag) {
 770                 oerrno = errno;
 771                 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 772                 if (*gateway) {
 773                         (void) printf(": gateway %s", gateway);
 774                         if (attempts > 1 && ret == 0 && af == AF_INET)
 775                             (void) printf(" (%s)",
 776                                 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
 777                 }
 778                 if (ret == 0) {
 779                         (void) printf("\n");
 780                 } else {
 781                         switch (oerrno) {
 782                         case ESRCH:
 783                                 errmsg = "not in table";
 784                                 break;
 785                         case EBUSY:
 786                                 errmsg = "entry in use";
 787                                 break;
 788                         case ENOBUFS:
 789                                 errmsg = "not enough memory";
 790                                 break;
 791                         case EADDRINUSE:
 792                                 /* handle recursion avoidance in rt_setgate() */
 793                                 errmsg = "gateway uses the same route";
 794                                 break;
 795                         case EEXIST:
 796                                 errmsg = "route already in table";
 797                                 break;
 798                         default:
 799                                 errmsg = strerror(oerrno);
 800                                 break;
 801                         }
 802                         (void) printf(": %s\n", errmsg);
 803                 }
 804         }
 805         exit(ret != 0);
 806 }
 807
 808 static void
 809 inet_makenetandmask(u_long net, struct sockaddr_in *sin, u_long bits)
 810 {
 811         u_long addr, mask = 0;
 812         char *cp;
 813
 814         rtm_addrs |= RTA_NETMASK;
 815         /*
 816          * XXX: This approach unable to handle 0.0.0.1/32 correctly
 817          * as inet_network() converts 0.0.0.1 and 1 equally.
 818          */
 819         if (net <= 0xff)
 820                 addr = net << IN_CLASSA_NSHIFT;
 821         else if (net <= 0xffff)
 822                 addr = net << IN_CLASSB_NSHIFT;
 823         else if (net <= 0xffffff)
 824                 addr = net << IN_CLASSC_NSHIFT;
 825         else
 826                 addr = net;
 827         /*
 828          * If no /xx was specified we must calculate the
 829          * CIDR address.
 830          */
 831         if ((bits == 0)  && (addr != 0)) {
 832                 u_long i, j;
 833                 for(i=0,j=0xff; i<4; i++)  {
 834                         if (addr & j) {
 835                                 break;
 836                         }
 837                         j <<= 8;
 838                 }
 839                 /* i holds the first non zero bit */
 840                 bits = 32 - (i*8);
 841         }
 842         if (bits != 0)
 843                 mask = 0xffffffff << (32 - bits);
 844
 845         sin->sin_addr.s_addr = htonl(addr);
 846         sin = &so_mask.sin;
 847         sin->sin_addr.s_addr = htonl(mask);
 848         sin->sin_len = 0;
 849         sin->sin_family = 0;
 850         cp = (char *)(&sin->sin_addr + 1);
 851         while (*--cp == 0 && cp > (char *)sin)
 852                 ;
 853         sin->sin_len = 1 + cp - (char *)sin;
 854 }
 855
 856 #ifdef INET6
 857 /*
 858  * XXX the function may need more improvement...
 859  */
 860 static int
 861 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
 862 {
 863         struct in6_addr in6;
 864
 865         if (plen == NULL) {
 866                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 867                     sin6->sin6_scope_id == 0) {
 868                         plen = "0";
 869                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 870                         /* aggregatable global unicast - RFC2374 */
 871                         memset(&in6, 0, sizeof(in6));
 872                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
 873                                     &in6.s6_addr[8], 8))
 874                                 plen = "64";
 875                 }
 876         }
 877
 878         if (plen == NULL || strcmp(plen, "128") == 0)
 879                 return (1);
 880         rtm_addrs |= RTA_NETMASK;
 881         prefixlen(plen);
 882         return (0);
 883 }
 884 #endif
 885
 886 /*
 887  * Interpret an argument as a network address of some kind,
 888  * returning 1 if a host address, 0 if a network address.
 889  */
 890 static int
 891 getaddr(int which, char *str, struct hostent **hpp)
 892 {
 893         sup su;
 894         struct hostent *hp;
 895         struct netent *np;
 896         u_long val;
 897         char *q;
 898         int afamily;  /* local copy of af so we can change it */
 899
 900         if (af == 0) {
 901                 af = AF_INET;
 902                 aflen = sizeof(struct sockaddr_in);
 903         }
 904         afamily = af;
 905         rtm_addrs |= which;
 906         switch (which) {
 907         case RTA_DST:
 908                 su = &so_dst;
 909                 break;
 910         case RTA_GATEWAY:
 911                 su = &so_gate;
 912                 if (iflag) {
 913                         struct ifaddrs *ifap, *ifa;
 914                         struct sockaddr_dl *sdl = NULL;
 915
 916                         if (getifaddrs(&ifap))
 917                                 err(1, "getifaddrs");
 918
 919                         for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
 920                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 921                                         continue;
 922
 923                                 if (strcmp(str, ifa->ifa_name) != 0)
 924                                         continue;
 925
 926                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 927                         }
 928                         /* If we found it, then use it */
 929                         if (sdl != NULL) {
 930                                 /*
 931                                  * Copy is safe since we have a
 932                                  * sockaddr_storage member in sockunion{}.
 933                                  * Note that we need to copy before calling
 934                                  * freeifaddrs().
 935                                  */
 936                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 937                         }
 938                         freeifaddrs(ifap);
 939                         if (sdl != NULL)
 940                                 return(1);
 941                 }
 942                 break;
 943         case RTA_NETMASK:
 944                 su = &so_mask;
 945                 break;
 946         case RTA_GENMASK:
 947                 su = &so_genmask;
 948                 break;
 949         case RTA_IFP:
 950                 su = &so_ifp;
 951                 afamily = AF_LINK;
 952                 break;
 953         case RTA_IFA:
 954                 su = &so_ifa;
 955                 break;
 956         default:
 957                 usage("internal error");
 958                 /*NOTREACHED*/
 959         }
 960         su->sa.sa_len = aflen;
 961         su->sa.sa_family = afamily; /* cases that don't want it have left already */
 962         if (strcmp(str, "default") == 0) {
 963                 /*
 964                  * Default is net 0.0.0.0/0
 965                  */
 966                 switch (which) {
 967                 case RTA_DST:
 968                         forcenet++;
 969 #if 0
 970                         bzero(su, sizeof(*su)); /* for readability */
 971 #endif
 972                         getaddr(RTA_NETMASK, str, 0);
 973                         break;
 974 #if 0
 975                 case RTA_NETMASK:
 976                 case RTA_GENMASK:
 977                         bzero(su, sizeof(*su)); /* for readability */
 978 #endif
 979                 }
 980                 return (0);
 981         }
 982         switch (afamily) {
 983 #ifdef INET6
 984         case AF_INET6:
 985         {
 986                 struct addrinfo hints, *res;
 987                 int ecode;
 988
 989                 q = NULL;
 990                 if (which == RTA_DST && (q = strchr(str, '/')) != NULL)
 991                         *q = '\0';
 992                 memset(&hints, 0, sizeof(hints));
 993                 hints.ai_family = afamily;      /*AF_INET6*/
 994                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
 995                 ecode = getaddrinfo(str, NULL, &hints, &res);
 996                 if (ecode != 0 || res->ai_family != AF_INET6 ||
 997                     res->ai_addrlen != sizeof(su->sin6)) {
 998                         (void) fprintf(stderr, "%s: %s\n", str,
 999                             gai_strerror(ecode));
1000                         exit(1);
1001                 }
1002                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
1003 #ifdef __KAME__
1004                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
1005                      IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) &&
1006                     su->sin6.sin6_scope_id) {
1007                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1008                                 htons(su->sin6.sin6_scope_id);
1009                         su->sin6.sin6_scope_id = 0;
1010                 }
1011 #endif
1012                 freeaddrinfo(res);
1013                 if (q != NULL)
1014                         *q++ = '/';
1015                 if (which == RTA_DST)
1016                         return (inet6_makenetandmask(&su->sin6, q));
1017                 return (0);
1018         }
1019 #endif /* INET6 */
1020
1021         case AF_APPLETALK:
1022                 if (!atalk_aton(str, &su->sat.sat_addr))
1023                         errx(EX_NOHOST, "bad address: %s", str);
1024                 rtm_addrs |= RTA_NETMASK;
1025                 return(forcehost || su->sat.sat_addr.s_node != 0);
1026
1027         case AF_LINK:
1028                 link_addr(str, &su->sdl);
1029                 return (1);
1030
1031
1032         case PF_ROUTE:
1033                 su->sa.sa_len = sizeof(*su);
1034                 sockaddr(str, &su->sa);
1035                 return (1);
1036
1037         case AF_INET:
1038         default:
1039                 break;
1040         }
1041
1042         if (hpp == NULL)
1043                 hpp = &hp;
1044         *hpp = NULL;
1045
1046         q = strchr(str,'/');
1047         if (q != NULL && which == RTA_DST) {
1048                 *q = '\0';
1049                 if ((val = inet_network(str)) != INADDR_NONE) {
1050                         inet_makenetandmask(
1051                                 val, &su->sin, strtoul(q+1, 0, 0));
1052                         return (0);
1053                 }
1054                 *q = '/';
1055         }
1056         if ((which != RTA_DST || forcenet == 0) &&
1057             inet_aton(str, &su->sin.sin_addr)) {
1058                 val = su->sin.sin_addr.s_addr;
1059                 if (which != RTA_DST || forcehost ||
1060                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1061                         return (1);
1062                 else {
1063                         val = ntohl(val);
1064                         goto netdone;
1065                 }
1066         }
1067         if (which == RTA_DST && forcehost == 0 &&
1068             ((val = inet_network(str)) != INADDR_NONE ||
1069             ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) {
1070 netdone:
1071                 inet_makenetandmask(val, &su->sin, 0);
1072                 return (0);
1073         }
1074         hp = gethostbyname(str);
1075         if (hp != NULL) {
1076                 *hpp = hp;
1077                 su->sin.sin_family = hp->h_addrtype;
1078                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1079                     MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr)));
1080                 return (1);
1081         }
1082         errx(EX_NOHOST, "bad address: %s", str);
1083 }
1084
1085 static int
1086 prefixlen(const char *str)
1087 {
1088         int len = atoi(str), q, r;
1089         int max;
1090         char *p;
1091
1092         rtm_addrs |= RTA_NETMASK;
1093         switch (af) {
1094 #ifdef INET6
1095         case AF_INET6:
1096                 max = 128;
1097                 p = (char *)&so_mask.sin6.sin6_addr;
1098                 break;
1099 #endif
1100         case AF_INET:
1101                 max = 32;
1102                 p = (char *)&so_mask.sin.sin_addr;
1103                 break;
1104         default:
1105                 fprintf(stderr, "prefixlen not supported in this af\n");
1106                 exit(1);
1107         }
1108
1109         if (len < 0 || max < len) {
1110                 fprintf(stderr, "%s: bad value\n", str);
1111                 exit(1);
1112         }
1113
1114         q = len >> 3;
1115         r = len & 7;
1116         so_mask.sa.sa_family = af;
1117         so_mask.sa.sa_len = aflen;
1118         memset((void *)p, 0, max / 8);
1119         if (q > 0)
1120                 memset((void *)p, 0xff, q);
1121         if (r > 0)
1122                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1123         if (len == max)
1124                 return (-1);
1125         else
1126                 return (len);
1127 }
1128
1129 static void
1130 interfaces(void)
1131 {
1132         size_t needed;
1133         int mib[6];
1134         char *buf, *lim, *next, count = 0;
1135         struct rt_msghdr *rtm;
1136
1137 retry2:
1138         mib[0] = CTL_NET;
1139         mib[1] = PF_ROUTE;
1140         mib[2] = 0;             /* protocol */
1141         mib[3] = 0;             /* wildcard address family */
1142         mib[4] = NET_RT_IFLIST;
1143         mib[5] = 0;             /* no flags */
1144         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1145                 err(EX_OSERR, "route-sysctl-estimate");
1146         if ((buf = malloc(needed)) == NULL)
1147                 errx(EX_OSERR, "malloc failed");
1148         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
1149                 if (errno == ENOMEM && count++ < 10) {
1150                         warnx("Routing table grew, retrying");
1151                         sleep(1);
1152                         free(buf);
1153                         goto retry2;
1154                 }
1155                 err(EX_OSERR, "actual retrieval of interface table");
1156         }
1157         lim = buf + needed;
1158         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1159                 rtm = (struct rt_msghdr *)next;
1160                 print_rtmsg(rtm, rtm->rtm_msglen);
1161         }
1162 }
1163
1164 static void
1165 monitor(void)
1166 {
1167         int n;
1168         char msg[2048];
1169
1170         verbose = 1;
1171         if (debugonly) {
1172                 interfaces();
1173                 exit(0);
1174         }
1175         for (;;) {
1176                 time_t now;
1177                 n = read(s, msg, 2048);
1178                 now = time(NULL);
1179                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1180                 print_rtmsg((struct rt_msghdr *)msg, n);
1181         }
1182 }
1183
1184 struct {
1185         struct  rt_msghdr m_rtm;
1186         char    m_space[512];
1187 } m_rtmsg;
1188
1189 static int
1190 rtmsg(int cmd, int flags)
1191 {
1192         static int seq;
1193         int rlen;
1194         char *cp = m_rtmsg.m_space;
1195         int l;
1196
1197 #define NEXTADDR(w, u) \
1198         if (rtm_addrs & (w)) {\
1199             l = SA_SIZE(&(u.sa)); memmove(cp, &(u), l); cp += l;\
1200             if (verbose) sodump(&(u),#u);\
1201         }
1202
1203         errno = 0;
1204         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1205         if (cmd == 'a')
1206                 cmd = RTM_ADD;
1207         else if (cmd == 'c')
1208                 cmd = RTM_CHANGE;
1209         else if (cmd == 'g' || cmd == 's') {
1210                 cmd = RTM_GET;
1211                 if (so_ifp.sa.sa_family == 0) {
1212                         so_ifp.sa.sa_family = AF_LINK;
1213                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1214                         rtm_addrs |= RTA_IFP;
1215                 }
1216         } else
1217                 cmd = RTM_DELETE;
1218 #define rtm m_rtmsg.m_rtm
1219         rtm.rtm_type = cmd;
1220         rtm.rtm_flags = flags;
1221         rtm.rtm_version = RTM_VERSION;
1222         rtm.rtm_seq = ++seq;
1223         rtm.rtm_addrs = rtm_addrs;
1224         rtm.rtm_rmx = rt_metrics;
1225         rtm.rtm_inits = rtm_inits;
1226
1227         if (rtm_addrs & RTA_NETMASK)
1228                 mask_addr();
1229         NEXTADDR(RTA_DST, so_dst);
1230         NEXTADDR(RTA_GATEWAY, so_gate);
1231         NEXTADDR(RTA_NETMASK, so_mask);
1232         NEXTADDR(RTA_GENMASK, so_genmask);
1233         NEXTADDR(RTA_IFP, so_ifp);
1234         NEXTADDR(RTA_IFA, so_ifa);
1235         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1236         if (verbose)
1237                 print_rtmsg(&rtm, l);
1238         if (debugonly)
1239                 return (0);
1240         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1241                 if (errno == EPERM)
1242                         err(1, "writing to routing socket");
1243                 warn("writing to routing socket");
1244                 return (-1);
1245         }
1246         if (cmd == RTM_GET) {
1247                 do {
1248                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1249                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1250                 if (l < 0)
1251                         warn("read from routing socket");
1252                 else
1253                         print_getmsg(&rtm, l);
1254         }
1255 #undef rtm
1256         return (0);
1257 }
1258
1259 static void
1260 mask_addr(void)
1261 {
1262         int olen = so_mask.sa.sa_len;
1263         char *cp1 = olen + (char *)&so_mask, *cp2;
1264
1265         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1266                 if (*--cp1 != 0) {
1267                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1268                         break;
1269                 }
1270         if ((rtm_addrs & RTA_DST) == 0)
1271                 return;
1272         switch (so_dst.sa.sa_family) {
1273         case AF_INET:
1274 #ifdef INET6
1275         case AF_INET6:
1276 #endif
1277         case AF_APPLETALK:
1278         case 0:
1279                 return;
1280         }
1281         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1282         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1283         while (cp2 > cp1)
1284                 *--cp2 = 0;
1285         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1286         while (cp1 > so_dst.sa.sa_data)
1287                 *--cp1 &= *--cp2;
1288 }
1289
1290 const char *msgtypes[] = {
1291         "",
1292         "RTM_ADD: Add Route",
1293         "RTM_DELETE: Delete Route",
1294         "RTM_CHANGE: Change Metrics or flags",
1295         "RTM_GET: Report Metrics",
1296         "RTM_LOSING: Kernel Suspects Partitioning",
1297         "RTM_REDIRECT: Told to use different route",
1298         "RTM_MISS: Lookup failed on this address",
1299         "RTM_LOCK: fix specified metrics",
1300         "RTM_OLDADD: caused by SIOCADDRT",
1301         "RTM_OLDDEL: caused by SIOCDELRT",
1302         "RTM_RESOLVE: Route created by cloning",
1303         "RTM_NEWADDR: address being added to iface",
1304         "RTM_DELADDR: address being removed from iface",
1305         "RTM_IFINFO: iface status change",
1306         "RTM_NEWMADDR: new multicast group membership on iface",
1307         "RTM_DELMADDR: multicast group membership removed from iface",
1308         "RTM_IFANNOUNCE: interface arrival/departure",
1309         "RTM_IEEE80211: IEEE 802.11 wireless event",
1310 };
1311
1312 char metricnames[] =
1313 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire"
1314 "\1mtu";
1315 char routeflags[] =
1316 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE"
1317 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE"
1318 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3"
1319 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY";
1320 char ifnetflags[] =
1321 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1322 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1323 "\017LINK2\020MULTICAST";
1324 char addrnames[] =
1325 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1326
1327 static const char errfmt[] =
1328 "\n%s: truncated route message, only %zu bytes left\n";
1329
1330 static void
1331 print_rtmsg(struct rt_msghdr *rtm, size_t msglen)
1332 {
1333         struct if_msghdr *ifm;
1334         struct ifa_msghdr *ifam;
1335 #ifdef RTM_NEWMADDR
1336         struct ifma_msghdr *ifmam;
1337 #endif
1338         struct if_announcemsghdr *ifan;
1339         const char *state;
1340
1341         if (verbose == 0)
1342                 return;
1343         if (rtm->rtm_version != RTM_VERSION) {
1344                 (void) printf("routing message version %d not understood\n",
1345                     rtm->rtm_version);
1346                 return;
1347         }
1348         if (rtm->rtm_type < sizeof(msgtypes) / sizeof(msgtypes[0]))
1349                 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1350         else
1351                 (void)printf("unknown type %d: ", rtm->rtm_type);
1352         (void)printf("len %d, ", rtm->rtm_msglen);
1353
1354 #define REQUIRE(x)      do {            \
1355         if (msglen < sizeof(x))         \
1356                 goto badlen;            \
1357         else                            \
1358                 msglen -= sizeof(x);    \
1359         } while (0)
1360
1361         switch (rtm->rtm_type) {
1362         case RTM_IFINFO:
1363                 REQUIRE(struct if_msghdr);
1364                 ifm = (struct if_msghdr *)rtm;
1365                 (void) printf("if# %d, ", ifm->ifm_index);
1366                 switch (ifm->ifm_data.ifi_link_state) {
1367                 case LINK_STATE_DOWN:
1368                         state = "down";
1369                         break;
1370                 case LINK_STATE_UP:
1371                         state = "up";
1372                         break;
1373                 default:
1374                         state = "unknown";
1375                         break;
1376                 }
1377                 (void) printf("link: %s, flags:", state);
1378                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1379                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen);
1380                 break;
1381         case RTM_NEWADDR:
1382         case RTM_DELADDR:
1383                 REQUIRE(struct ifa_msghdr);
1384                 ifam = (struct ifa_msghdr *)rtm;
1385                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1386                 bprintf(stdout, ifam->ifam_flags, routeflags);
1387                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen);
1388                 break;
1389 #ifdef RTM_NEWMADDR
1390         case RTM_NEWMADDR:
1391         case RTM_DELMADDR:
1392                 REQUIRE(struct ifma_msghdr);
1393                 ifmam = (struct ifma_msghdr *)rtm;
1394                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen);
1395                 break;
1396 #endif
1397         case RTM_IFANNOUNCE:
1398                 REQUIRE(struct if_announcemsghdr);
1399                 ifan = (struct if_announcemsghdr *)rtm;
1400                 (void) printf("if# %d, what: ", ifan->ifan_index);
1401                 switch (ifan->ifan_what) {
1402                 case IFAN_ARRIVAL:
1403                         printf("arrival");
1404                         break;
1405                 case IFAN_DEPARTURE:
1406                         printf("departure");
1407                         break;
1408                 default:
1409                         printf("#%d", ifan->ifan_what);
1410                         break;
1411                 }
1412                 printf("\n");
1413                 break;
1414
1415         default:
1416                 (void) printf("pid: %ld, seq %d, errno %d, flags:",
1417                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1418                 bprintf(stdout, rtm->rtm_flags, routeflags);
1419                 pmsg_common(rtm, msglen);
1420         }
1421
1422         return;
1423
1424 badlen:
1425         (void)printf(errfmt, __func__, msglen);
1426 #undef  REQUIRE
1427 }
1428
1429 static void
1430 print_getmsg(struct rt_msghdr *rtm, int msglen)
1431 {
1432         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1433         struct sockaddr_dl *ifp = NULL;
1434         struct sockaddr *sa;
1435         char *cp;
1436         int i;
1437
1438         (void) printf("   route to: %s\n",
1439             routename((struct sockaddr *)&so_dst));
1440         if (rtm->rtm_version != RTM_VERSION) {
1441                 warnx("routing message version %d not understood",
1442                      rtm->rtm_version);
1443                 return;
1444         }
1445         if (rtm->rtm_msglen > msglen) {
1446                 warnx("message length mismatch, in packet %d, returned %d",
1447                       rtm->rtm_msglen, msglen);
1448         }
1449         if (rtm->rtm_errno)  {
1450                 errno = rtm->rtm_errno;
1451                 warn("message indicates error %d", errno);
1452                 return;
1453         }
1454         cp = ((char *)(rtm + 1));
1455         if (rtm->rtm_addrs)
1456                 for (i = 1; i; i <<= 1)
1457                         if (i & rtm->rtm_addrs) {
1458                                 sa = (struct sockaddr *)cp;
1459                                 switch (i) {
1460                                 case RTA_DST:
1461                                         dst = sa;
1462                                         break;
1463                                 case RTA_GATEWAY:
1464                                         gate = sa;
1465                                         break;
1466                                 case RTA_NETMASK:
1467                                         mask = sa;
1468                                         break;
1469                                 case RTA_IFP:
1470                                         if (sa->sa_family == AF_LINK &&
1471                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1472                                                 ifp = (struct sockaddr_dl *)sa;
1473                                         break;
1474                                 }
1475                                 cp += SA_SIZE(sa);
1476                         }
1477         if (dst && mask)
1478                 mask->sa_family = dst->sa_family;       /* XXX */
1479         if (dst)
1480                 (void)printf("destination: %s\n", routename(dst));
1481         if (mask) {
1482                 int savenflag = nflag;
1483
1484                 nflag = 1;
1485                 (void)printf("       mask: %s\n", routename(mask));
1486                 nflag = savenflag;
1487         }
1488         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1489                 (void)printf("    gateway: %s\n", routename(gate));
1490         if (ifp)
1491                 (void)printf("  interface: %.*s\n",
1492                     ifp->sdl_nlen, ifp->sdl_data);
1493         (void)printf("      flags: ");
1494         bprintf(stdout, rtm->rtm_flags, routeflags);
1495
1496 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1497 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1498
1499         (void) printf("\n%s\n", "\
1500  recvpipe  sendpipe  ssthresh  rtt,msec    mtu        weight    expire");
1501         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1502         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1503         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1504         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1505         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1506         printf("%8ld%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT));
1507         if (rtm->rtm_rmx.rmx_expire)
1508                 rtm->rtm_rmx.rmx_expire -= time(0);
1509         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1510 #undef lock
1511 #undef msec
1512 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1513         if (verbose)
1514                 pmsg_common(rtm, msglen);
1515         else if (rtm->rtm_addrs &~ RTA_IGN) {
1516                 (void) printf("sockaddrs: ");
1517                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1518                 putchar('\n');
1519         }
1520 #undef  RTA_IGN
1521 }
1522
1523 static void
1524 pmsg_common(struct rt_msghdr *rtm, size_t msglen)
1525 {
1526         (void) printf("\nlocks: ");
1527         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1528         (void) printf(" inits: ");
1529         bprintf(stdout, rtm->rtm_inits, metricnames);
1530         if (msglen > sizeof(struct rt_msghdr))
1531                 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs,
1532                     msglen - sizeof(struct rt_msghdr));
1533         else
1534                 (void) fflush(stdout);
1535 }
1536
1537 static void
1538 pmsg_addrs(char *cp, int addrs, size_t len)
1539 {
1540         struct sockaddr *sa;
1541         int i;
1542
1543         if (addrs == 0) {
1544                 (void) putchar('\n');
1545                 return;
1546         }
1547         (void) printf("\nsockaddrs: ");
1548         bprintf(stdout, addrs, addrnames);
1549         (void) putchar('\n');
1550         for (i = 1; i != 0; i <<= 1)
1551                 if (i & addrs) {
1552                         sa = (struct sockaddr *)cp;
1553                         if (len == 0 || len < SA_SIZE(sa)) {
1554                                 (void) printf(errfmt, __func__, len);
1555                                 break;
1556                         }
1557                         (void) printf(" %s", routename(sa));
1558                         len -= SA_SIZE(sa);
1559                         cp += SA_SIZE(sa);
1560                 }
1561         (void) putchar('\n');
1562         (void) fflush(stdout);
1563 }
1564
1565 static void
1566 bprintf(FILE *fp, int b, u_char *str)
1567 {
1568         int i;
1569         int gotsome = 0;
1570
1571         if (b == 0)
1572                 return;
1573         while ((i = *str++) != 0) {
1574                 if (b & (1 << (i-1))) {
1575                         if (gotsome == 0)
1576                                 i = '<';
1577                         else
1578                                 i = ',';
1579                         (void) putc(i, fp);
1580                         gotsome = 1;
1581                         for (; (i = *str) > 32; str++)
1582                                 (void) putc(i, fp);
1583                 } else
1584                         while (*str > 32)
1585                                 str++;
1586         }
1587         if (gotsome)
1588                 (void) putc('>', fp);
1589 }
1590
1591 int
1592 keyword(const char *cp)
1593 {
1594         struct keytab *kt = keywords;
1595
1596         while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
1597                 kt++;
1598         return (kt->kt_i);
1599 }
1600
1601 static void
1602 sodump(sup su, const char *which)
1603 {
1604         switch (su->sa.sa_family) {
1605         case AF_LINK:
1606                 (void) printf("%s: link %s; ",
1607                     which, link_ntoa(&su->sdl));
1608                 break;
1609         case AF_INET:
1610                 (void) printf("%s: inet %s; ",
1611                     which, inet_ntoa(su->sin.sin_addr));
1612                 break;
1613         case AF_APPLETALK:
1614                 (void) printf("%s: atalk %s; ",
1615                     which, atalk_ntoa(su->sat.sat_addr));
1616                 break;
1617         }
1618         (void) fflush(stdout);
1619 }
1620
1621 /* States*/
1622 #define VIRGIN  0
1623 #define GOTONE  1
1624 #define GOTTWO  2
1625 /* Inputs */
1626 #define DIGIT   (4*0)
1627 #define END     (4*1)
1628 #define DELIM   (4*2)
1629
1630 static void
1631 sockaddr(char *addr, struct sockaddr *sa)
1632 {
1633         char *cp = (char *)sa;
1634         int size = sa->sa_len;
1635         char *cplim = cp + size;
1636         int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1637
1638         memset(cp, 0, size);
1639         cp++;
1640         do {
1641                 if ((*addr >= '0') && (*addr <= '9')) {
1642                         new = *addr - '0';
1643                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1644                         new = *addr - 'a' + 10;
1645                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1646                         new = *addr - 'A' + 10;
1647                 } else if (*addr == '\0')
1648                         state |= END;
1649                 else
1650                         state |= DELIM;
1651                 addr++;
1652                 switch (state /* | INPUT */) {
1653                 case GOTTWO | DIGIT:
1654                         *cp++ = byte; /*FALLTHROUGH*/
1655                 case VIRGIN | DIGIT:
1656                         state = GOTONE; byte = new; continue;
1657                 case GOTONE | DIGIT:
1658                         state = GOTTWO; byte = new + (byte << 4); continue;
1659                 default: /* | DELIM */
1660                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1661                 case GOTONE | END:
1662                 case GOTTWO | END:
1663                         *cp++ = byte; /* FALLTHROUGH */
1664                 case VIRGIN | END:
1665                         break;
1666                 }
1667                 break;
1668         } while (cp < cplim);
1669         sa->sa_len = cp - (char *)sa;
1670 }
1671
1672 static int
1673 atalk_aton(const char *text, struct at_addr *addr)
1674 {
1675         u_int net, node;
1676
1677         if (sscanf(text, "%u.%u", &net, &node) != 2
1678             || net > 0xffff || node > 0xff)
1679                 return(0);
1680         addr->s_net = htons(net);
1681         addr->s_node = node;
1682         return(1);
1683 }
1684
1685 static char *
1686 atalk_ntoa(struct at_addr at)
1687 {
1688         static char buf[20];
1689
1690         (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1691         return(buf);
1692 }