sbin/route/route.c

   1 /*
   2  * Copyright (c) 1983, 1989, 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1983, 1989, 1991, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)route.c  8.6 (Berkeley) 4/28/95
  35  * $FreeBSD: src/sbin/route/route.c,v 1.40.2.11 2003/02/27 23:10:10 ru Exp $
  36  * $DragonFly: src/sbin/route/route.c,v 1.7 2004/03/23 18:25:51 dillon Exp $
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/file.h>
  41 #include <sys/socket.h>
  42 #include <sys/ioctl.h>
  43 #include <sys/sysctl.h>
  44 #include <sys/types.h>
  45
  46 #include <net/if.h>
  47 #include <net/route.h>
  48 #include <net/if_dl.h>
  49 #include <netinet/in.h>
  50 #include <netinet/if_ether.h>
  51 #include <netatalk/at.h>
  52 #ifdef NS
  53 #include <netns/ns.h>
  54 #endif
  55 #include <arpa/inet.h>
  56 #include <netdb.h>
  57
  58 #include <ctype.h>
  59 #include <err.h>
  60 #include <errno.h>
  61 #include <paths.h>
  62 #include <stdio.h>
  63 #include <stdlib.h>
  64 #include <string.h>
  65 #include <sysexits.h>
  66 #include <unistd.h>
  67 #include <ifaddrs.h>
  68
  69 #include "extern.h"
  70 #include "keywords.h"
  71
  72 struct  ortentry route;
  73 union   sockunion {
  74         struct  sockaddr sa;
  75         struct  sockaddr_in sin;
  76 #ifdef INET6
  77         struct  sockaddr_in6 sin6;
  78 #endif
  79         struct  sockaddr_at sat;
  80 #ifdef NS
  81         struct  sockaddr_ns sns;
  82 #endif
  83         struct  sockaddr_dl sdl;
  84         struct  sockaddr_inarp sinarp;
  85         struct  sockaddr_storage ss; /* added to avoid memory overrun */
  86 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
  87
  88 typedef union sockunion *sup;
  89
  90 int     pid, rtm_addrs;
  91 int     s;
  92 int     forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword();
  93 int     iflag, verbose, aflen = sizeof(struct sockaddr_in);
  94 int     wflag;
  95 int     locking, lockrest, debugonly;
  96 struct  rt_metrics rt_metrics;
  97 u_long  rtm_inits;
  98 uid_t   uid;
  99
 100 int      atalk_aton(const char *, struct at_addr *);
 101 char    *atalk_ntoa(struct at_addr);
 102 char    *netname(struct sockaddr *);
 103 void     flushroutes(int, char **);
 104 void     newroute(int, char **);
 105 void     monitor(void);
 106 void     sockaddr(char *, struct sockaddr *);
 107 void     sodump(sup, char *);
 108 void     bprintf(FILE *, int, u_char *);
 109 void     print_getmsg(struct rt_msghdr *, int);
 110 void     print_rtmsg(struct rt_msghdr *, int);
 111 void     pmsg_common(struct rt_msghdr *);
 112 void     pmsg_addrs(char *, int);
 113 void     mask_addr(void);
 114 #ifdef INET6
 115 static int inet6_makenetandmask(struct sockaddr_in6 *, char *);
 116 #endif
 117 int      getaddr(int, char *, struct hostent **);
 118 int      rtmsg(int, int);
 119 int      x25_makemask();
 120 int      prefixlen(char *);
 121 extern  char *iso_ntoa();
 122
 123 void usage(const char *) __dead2;
 124
 125 void
 126 usage(const char *cp)
 127 {
 128         if (cp)
 129                 warnx("bad keyword: %s", cp);
 130         fprintf(stderr, "usage: route [-dnqtv] command [[modifiers] args]\n");
 131         exit(EX_USAGE);
 132         /* NOTREACHED */
 133 }
 134
 135 #define ROUNDUP(a) \
 136         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 137 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 138
 139 int
 140 main(int argc, char **argv)
 141 {
 142         int ch;
 143
 144         if (argc < 2)
 145                 usage((char *)NULL);
 146
 147         while ((ch = getopt(argc, argv, "wnqdtv")) != -1)
 148                 switch(ch) {
 149                 case 'w':
 150                         wflag = 1;
 151                         break;
 152                 case 'n':
 153                         nflag = 1;
 154                         break;
 155                 case 'q':
 156                         qflag = 1;
 157                         break;
 158                 case 'v':
 159                         verbose = 1;
 160                         break;
 161                 case 't':
 162                         tflag = 1;
 163                         break;
 164                 case 'd':
 165                         debugonly = 1;
 166                         break;
 167                 case '?':
 168                 default:
 169                         usage((char *)NULL);
 170                 }
 171         argc -= optind;
 172         argv += optind;
 173
 174         pid = getpid();
 175         uid = geteuid();
 176         if (tflag)
 177                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 178         else
 179                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 180         if (s < 0)
 181                 err(EX_OSERR, "socket");
 182         if (*argv)
 183                 switch (keyword(*argv)) {
 184                 case K_GET:
 185                         uid = 0;
 186                         /* FALLTHROUGH */
 187
 188                 case K_CHANGE:
 189                 case K_ADD:
 190                 case K_DELETE:
 191                         newroute(argc, argv);
 192                         /* NOTREACHED */
 193
 194                 case K_SHOW:
 195                         show(argc, argv);
 196                         return(0);
 197
 198                 case K_MONITOR:
 199                         monitor();
 200                         /* NOTREACHED */
 201
 202                 case K_FLUSH:
 203                         flushroutes(argc, argv);
 204                         exit(0);
 205                         /* NOTREACHED */
 206                 }
 207         usage(*argv);
 208         /* NOTREACHED */
 209 }
 210
 211 /*
 212  * Purge all entries in the routing tables not
 213  * associated with network interfaces.
 214  */
 215 void
 216 flushroutes(int argc, char **argv)
 217 {
 218         size_t needed;
 219         int mib[6], rlen, seqno;
 220         char *buf, *next, *lim;
 221         struct rt_msghdr *rtm;
 222
 223         if (uid) {
 224                 errx(EX_NOPERM, "must be root to alter routing table");
 225         }
 226         shutdown(s, 0); /* Don't want to read back our messages */
 227         if (argc > 1) {
 228                 argv++;
 229                 if (argc == 2 && **argv == '-')
 230                     switch (keyword(*argv + 1)) {
 231                         case K_INET:
 232                                 af = AF_INET;
 233                                 break;
 234 #ifdef INET6
 235                         case K_INET6:
 236                                 af = AF_INET6;
 237                                 break;
 238 #endif
 239                         case K_ATALK:
 240                                 af = AF_APPLETALK;
 241                                 break;
 242 #ifdef NS
 243                         case K_XNS:
 244                                 af = AF_NS;
 245                                 break;
 246 #endif
 247                         case K_LINK:
 248                                 af = AF_LINK;
 249                                 break;
 250                         default:
 251                                 goto bad;
 252                 } else
 253 bad:                    usage(*argv);
 254         }
 255         mib[0] = CTL_NET;
 256         mib[1] = PF_ROUTE;
 257         mib[2] = 0;             /* protocol */
 258         mib[3] = 0;             /* wildcard address family */
 259         mib[4] = NET_RT_DUMP;
 260         mib[5] = 0;             /* no flags */
 261         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 262                 err(EX_OSERR, "route-sysctl-estimate");
 263         if ((buf = malloc(needed)) == NULL)
 264                 errx(EX_OSERR, "malloc failed");
 265         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 266                 err(EX_OSERR, "route-sysctl-get");
 267         lim = buf + needed;
 268         if (verbose)
 269                 printf("Examining routing table from sysctl\n");
 270         seqno = 0;              /* ??? */
 271         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 272                 rtm = (struct rt_msghdr *)next;
 273                 if (verbose)
 274                         print_rtmsg(rtm, rtm->rtm_msglen);
 275                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 276                         continue;
 277                 if (af) {
 278                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 279
 280                         if (sa->sa_family != af)
 281                                 continue;
 282                 }
 283                 if (debugonly)
 284                         continue;
 285                 rtm->rtm_type = RTM_DELETE;
 286                 rtm->rtm_seq = seqno;
 287                 rlen = write(s, next, rtm->rtm_msglen);
 288                 if (rlen < (int)rtm->rtm_msglen) {
 289                         warn("write to routing socket");
 290                         printf("got only %d for rlen\n", rlen);
 291                         break;
 292                 }
 293                 seqno++;
 294                 if (qflag)
 295                         continue;
 296                 if (verbose) {
 297                         print_rtmsg(rtm, rlen);
 298                 } else {
 299                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 300                         if (wflag) {
 301                             printf("%-20s ", rtm->rtm_flags & RTF_HOST ?
 302                                 routename(sa) : netname(sa));
 303                         } else {
 304                             printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 305                                 routename(sa) : netname(sa));
 306                         }
 307                         sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) +
 308                             (char *)sa);
 309                         if (wflag) {
 310                             printf("%-20s ", routename(sa));
 311                         } else {
 312                             printf("%-20.20s ", routename(sa));
 313                         }
 314                         printf("done\n");
 315                 }
 316         }
 317 }
 318
 319 char *
 320 routename(struct sockaddr *sa)
 321 {
 322         char *cp;
 323         static char line[MAXHOSTNAMELEN + 1];
 324         struct hostent *hp;
 325         static char domain[MAXHOSTNAMELEN + 1];
 326         static int first = 1;
 327 #ifdef NS
 328         char *ns_print();
 329 #endif
 330
 331         if (first) {
 332                 first = 0;
 333                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 334                     (cp = strchr(domain, '.'))) {
 335                         domain[MAXHOSTNAMELEN] = '\0';
 336                         strcpy(domain, cp + 1);
 337                 } else
 338                         domain[0] = 0;
 339         }
 340
 341         if (sa->sa_len == 0)
 342                 strcpy(line, "default");
 343         else switch (sa->sa_family) {
 344
 345         case AF_INET:
 346             {   struct in_addr in;
 347                 in = ((struct sockaddr_in *)sa)->sin_addr;
 348
 349                 cp = 0;
 350                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 351                         cp = "default";
 352                 if (cp == 0 && !nflag) {
 353                         hp = gethostbyaddr((char *)&in, sizeof(struct in_addr),
 354                                 AF_INET);
 355                         if (hp) {
 356                                 if ((cp = strchr(hp->h_name, '.')) && !wflag &&
 357                                     !strcmp(cp + 1, domain))
 358                                         *cp = 0;
 359                                 cp = hp->h_name;
 360                         }
 361                 }
 362                 if (cp) {
 363                         strncpy(line, cp, sizeof(line) - 1);
 364                         line[sizeof(line) - 1] = '\0';
 365                 } else
 366                         sprintf(line, "%s", inet_ntoa(in));
 367                 break;
 368             }
 369
 370 #ifdef INET6
 371         case AF_INET6:
 372         {
 373                 struct sockaddr_in6 sin6; /* use static var for safety */
 374                 int niflags = 0;
 375 #ifdef NI_WITHSCOPEID
 376                 niflags = NI_WITHSCOPEID;
 377 #endif
 378
 379                 memset(&sin6, 0, sizeof(sin6));
 380                 memcpy(&sin6, sa, sa->sa_len);
 381                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 382                 sin6.sin6_family = AF_INET6;
 383 #ifdef __KAME__
 384                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 385                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 386                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 387                     sin6.sin6_scope_id == 0) {
 388                         sin6.sin6_scope_id =
 389                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 390                         sin6.sin6_addr.s6_addr[2] = 0;
 391                         sin6.sin6_addr.s6_addr[3] = 0;
 392                 }
 393 #endif
 394                 if (nflag)
 395                         niflags |= NI_NUMERICHOST;
 396                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 397                     line, sizeof(line), NULL, 0, niflags) != 0)
 398                         strncpy(line, "invalid", sizeof(line));
 399
 400                 return(line);
 401         }
 402 #endif
 403
 404         case AF_APPLETALK:
 405                 snprintf(line, sizeof(line), "atalk %s",
 406                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 407                 break;
 408
 409 #ifdef NS
 410         case AF_NS:
 411                 return(ns_print((struct sockaddr_ns *)sa));
 412 #endif
 413
 414         case AF_LINK:
 415                 return(link_ntoa((struct sockaddr_dl *)sa));
 416
 417         default:
 418             {   u_short *s = (u_short *)sa;
 419                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 420                 char *cp = line + sprintf(line, "(%d)", sa->sa_family);
 421                 char *cpe = line + sizeof(line);
 422
 423                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 424                         cp += snprintf(cp, cpe - cp, " %x", *s);
 425                 break;
 426             }
 427         }
 428         return(line);
 429 }
 430
 431 /*
 432  * Return the name of the network whose address is given.
 433  * The address is assumed to be that of a net or subnet, not a host.
 434  */
 435 char *
 436 netname(struct sockaddr *sa)
 437 {
 438         char *cp = 0;
 439         static char line[MAXHOSTNAMELEN + 1];
 440         struct netent *np = 0;
 441         u_long net, mask;
 442         u_long i;
 443         int subnetshift;
 444 #ifdef NS
 445         char *ns_print();
 446 #endif
 447
 448         switch (sa->sa_family) {
 449
 450         case AF_INET:
 451             {   struct in_addr in;
 452                 in = ((struct sockaddr_in *)sa)->sin_addr;
 453
 454                 i = in.s_addr = ntohl(in.s_addr);
 455                 if (in.s_addr == 0)
 456                         cp = "default";
 457                 else if (!nflag) {
 458                         if (IN_CLASSA(i)) {
 459                                 mask = IN_CLASSA_NET;
 460                                 subnetshift = 8;
 461                         } else if (IN_CLASSB(i)) {
 462                                 mask = IN_CLASSB_NET;
 463                                 subnetshift = 8;
 464                         } else {
 465                                 mask = IN_CLASSC_NET;
 466                                 subnetshift = 4;
 467                         }
 468                         /*
 469                          * If there are more bits than the standard mask
 470                          * would suggest, subnets must be in use.
 471                          * Guess at the subnet mask, assuming reasonable
 472                          * width subnet fields.
 473                          */
 474                         while (in.s_addr &~ mask)
 475                                 mask = (long)mask >> subnetshift;
 476                         net = in.s_addr & mask;
 477                         while ((mask & 1) == 0)
 478                                 mask >>= 1, net >>= 1;
 479                         np = getnetbyaddr(net, AF_INET);
 480                         if (np)
 481                                 cp = np->n_name;
 482                 }
 483 #define C(x)    (unsigned)((x) & 0xff)
 484                 if (cp)
 485                         strncpy(line, cp, sizeof(line));
 486                 else if ((in.s_addr & 0xffffff) == 0)
 487                         sprintf(line, "%u", C(in.s_addr >> 24));
 488                 else if ((in.s_addr & 0xffff) == 0)
 489                         sprintf(line, "%u.%u", C(in.s_addr >> 24),
 490                             C(in.s_addr >> 16));
 491                 else if ((in.s_addr & 0xff) == 0)
 492                         sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 493                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 494                 else
 495                         sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 496                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 497                             C(in.s_addr));
 498 #undef C
 499                 break;
 500             }
 501
 502 #ifdef INET6
 503         case AF_INET6:
 504         {
 505                 struct sockaddr_in6 sin6; /* use static var for safety */
 506                 int niflags = 0;
 507 #ifdef NI_WITHSCOPEID
 508                 niflags = NI_WITHSCOPEID;
 509 #endif
 510
 511                 memset(&sin6, 0, sizeof(sin6));
 512                 memcpy(&sin6, sa, sa->sa_len);
 513                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 514                 sin6.sin6_family = AF_INET6;
 515 #ifdef __KAME__
 516                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 517                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 518                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 519                     sin6.sin6_scope_id == 0) {
 520                         sin6.sin6_scope_id =
 521                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 522                         sin6.sin6_addr.s6_addr[2] = 0;
 523                         sin6.sin6_addr.s6_addr[3] = 0;
 524                 }
 525 #endif
 526                 if (nflag)
 527                         niflags |= NI_NUMERICHOST;
 528                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 529                     line, sizeof(line), NULL, 0, niflags) != 0)
 530                         strncpy(line, "invalid", sizeof(line));
 531
 532                 return(line);
 533         }
 534 #endif
 535
 536         case AF_APPLETALK:
 537                 snprintf(line, sizeof(line), "atalk %s",
 538                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 539                 break;
 540
 541 #ifdef NS
 542         case AF_NS:
 543                 return(ns_print((struct sockaddr_ns *)sa));
 544                 break;
 545 #endif
 546
 547         case AF_LINK:
 548                 return(link_ntoa((struct sockaddr_dl *)sa));
 549
 550
 551         default:
 552             {   u_short *s = (u_short *)sa->sa_data;
 553                 u_short *slim = s + ((sa->sa_len + 1)>>1);
 554                 char *cp = line + sprintf(line, "af %d:", sa->sa_family);
 555                 char *cpe = line + sizeof(line);
 556
 557                 while (s < slim && cp < cpe)
 558                         cp += snprintf(cp, cpe - cp, " %x", *s++);
 559                 break;
 560             }
 561         }
 562         return(line);
 563 }
 564
 565 void
 566 set_metric(char *value, int key)
 567 {
 568         int flag = 0;
 569         u_long noval, *valp = &noval;
 570
 571         switch (key) {
 572 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 573         caseof(K_MTU, RTV_MTU, rmx_mtu);
 574         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 575         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 576         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 577         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 578         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 579         caseof(K_RTT, RTV_RTT, rmx_rtt);
 580         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 581         }
 582         rtm_inits |= flag;
 583         if (lockrest || locking)
 584                 rt_metrics.rmx_locks |= flag;
 585         if (locking)
 586                 locking = 0;
 587         *valp = atoi(value);
 588 }
 589
 590 void
 591 newroute(int argc, char **argv)
 592 {
 593         char *cmd, *dest = "", *gateway = "", *err;
 594         int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 595         int key;
 596         struct hostent *hp = 0;
 597
 598         if (uid) {
 599                 errx(EX_NOPERM, "must be root to alter routing table");
 600         }
 601         cmd = argv[0];
 602         if (*cmd != 'g')
 603                 shutdown(s, 0); /* Don't want to read back our messages */
 604         while (--argc > 0) {
 605                 if (**(++argv)== '-') {
 606                         switch (key = keyword(1 + *argv)) {
 607                         case K_LINK:
 608                                 af = AF_LINK;
 609                                 aflen = sizeof(struct sockaddr_dl);
 610                                 break;
 611                         case K_INET:
 612                                 af = AF_INET;
 613                                 aflen = sizeof(struct sockaddr_in);
 614                                 break;
 615 #ifdef INET6
 616                         case K_INET6:
 617                                 af = AF_INET6;
 618                                 aflen = sizeof(struct sockaddr_in6);
 619                                 break;
 620 #endif
 621                         case K_ATALK:
 622                                 af = AF_APPLETALK;
 623                                 aflen = sizeof(struct sockaddr_at);
 624                                 break;
 625                         case K_SA:
 626                                 af = PF_ROUTE;
 627                                 aflen = sizeof(union sockunion);
 628                                 break;
 629 #ifdef NS
 630                         case K_XNS:
 631                                 af = AF_NS;
 632                                 aflen = sizeof(struct sockaddr_ns);
 633                                 break;
 634 #endif
 635                         case K_IFACE:
 636                         case K_INTERFACE:
 637                                 iflag++;
 638                                 break;
 639                         case K_NOSTATIC:
 640                                 flags &= ~RTF_STATIC;
 641                                 break;
 642                         case K_LLINFO:
 643                                 flags |= RTF_LLINFO;
 644                                 break;
 645                         case K_LOCK:
 646                                 locking = 1;
 647                                 break;
 648                         case K_LOCKREST:
 649                                 lockrest = 1;
 650                                 break;
 651                         case K_HOST:
 652                                 forcehost++;
 653                                 break;
 654                         case K_REJECT:
 655                                 flags |= RTF_REJECT;
 656                                 break;
 657                         case K_BLACKHOLE:
 658                                 flags |= RTF_BLACKHOLE;
 659                                 break;
 660                         case K_PROTO1:
 661                                 flags |= RTF_PROTO1;
 662                                 break;
 663                         case K_PROTO2:
 664                                 flags |= RTF_PROTO2;
 665                                 break;
 666                         case K_PROXY:
 667                                 proxy = 1;
 668                                 break;
 669                         case K_CLONING:
 670                                 flags |= RTF_CLONING;
 671                                 break;
 672                         case K_XRESOLVE:
 673                                 flags |= RTF_XRESOLVE;
 674                                 break;
 675                         case K_STATIC:
 676                                 flags |= RTF_STATIC;
 677                                 break;
 678                         case K_IFA:
 679                                 if (!--argc)
 680                                         usage((char *)NULL);
 681                                 getaddr(RTA_IFA, *++argv, 0);
 682                                 break;
 683                         case K_IFP:
 684                                 if (!--argc)
 685                                         usage((char *)NULL);
 686                                 getaddr(RTA_IFP, *++argv, 0);
 687                                 break;
 688                         case K_GENMASK:
 689                                 if (!--argc)
 690                                         usage((char *)NULL);
 691                                 getaddr(RTA_GENMASK, *++argv, 0);
 692                                 break;
 693                         case K_GATEWAY:
 694                                 if (!--argc)
 695                                         usage((char *)NULL);
 696                                 getaddr(RTA_GATEWAY, *++argv, 0);
 697                                 break;
 698                         case K_DST:
 699                                 if (!--argc)
 700                                         usage((char *)NULL);
 701                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 702                                 dest = *argv;
 703                                 break;
 704                         case K_NETMASK:
 705                                 if (!--argc)
 706                                         usage((char *)NULL);
 707                                 getaddr(RTA_NETMASK, *++argv, 0);
 708                                 /* FALLTHROUGH */
 709                         case K_NET:
 710                                 forcenet++;
 711                                 break;
 712                         case K_PREFIXLEN:
 713                                 if (!--argc)
 714                                         usage((char *)NULL);
 715                                 if (prefixlen(*++argv) == -1) {
 716                                         forcenet = 0;
 717                                         ishost = 1;
 718                                 } else {
 719                                         forcenet = 1;
 720                                         ishost = 0;
 721                                 }
 722                                 break;
 723                         case K_MTU:
 724                         case K_HOPCOUNT:
 725                         case K_EXPIRE:
 726                         case K_RECVPIPE:
 727                         case K_SENDPIPE:
 728                         case K_SSTHRESH:
 729                         case K_RTT:
 730                         case K_RTTVAR:
 731                                 if (!--argc)
 732                                         usage((char *)NULL);
 733                                 set_metric(*++argv, key);
 734                                 break;
 735                         default:
 736                                 usage(1+*argv);
 737                         }
 738                 } else {
 739                         if ((rtm_addrs & RTA_DST) == 0) {
 740                                 dest = *argv;
 741                                 ishost = getaddr(RTA_DST, *argv, &hp);
 742                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 743                                 gateway = *argv;
 744                                 getaddr(RTA_GATEWAY, *argv, &hp);
 745                         } else {
 746                                 getaddr(RTA_NETMASK, *argv, 0);
 747                                 forcenet = 1;
 748                         }
 749                 }
 750         }
 751         if (forcehost) {
 752                 ishost = 1;
 753 #ifdef INET6
 754                 if (af == AF_INET6) {
 755                         rtm_addrs &= ~RTA_NETMASK;
 756                         memset((void *)&so_mask, 0, sizeof(so_mask));
 757                 }
 758 #endif
 759         }
 760         if (forcenet)
 761                 ishost = 0;
 762         flags |= RTF_UP;
 763         if (ishost)
 764                 flags |= RTF_HOST;
 765         if (iflag == 0)
 766                 flags |= RTF_GATEWAY;
 767         if (proxy) {
 768                 so_dst.sinarp.sin_other = SIN_PROXY;
 769                 flags |= RTF_ANNOUNCE;
 770         }
 771         for (attempts = 1; ; attempts++) {
 772                 errno = 0;
 773                 if ((ret = rtmsg(*cmd, flags)) == 0)
 774                         break;
 775                 if (errno != ENETUNREACH && errno != ESRCH)
 776                         break;
 777                 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 778                         hp->h_addr_list++;
 779                         memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0],
 780                             MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
 781                 } else
 782                         break;
 783         }
 784         if (*cmd == 'g')
 785                 exit(0);
 786         if (!qflag) {
 787                 oerrno = errno;
 788                 printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 789                 if (*gateway) {
 790                         printf(": gateway %s", gateway);
 791                         if (attempts > 1 && ret == 0 && af == AF_INET)
 792                             printf(" (%s)",
 793                                 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
 794                 }
 795                 if (ret == 0) {
 796                         printf("\n");
 797                 } else {
 798                         switch (oerrno) {
 799                         case ESRCH:
 800                                 err = "not in table";
 801                                 break;
 802                         case EBUSY:
 803                                 err = "entry in use";
 804                                 break;
 805                         case ENOBUFS:
 806                                 err = "routing table overflow";
 807                                 break;
 808                         case EDQUOT: /* handle recursion avoidance in
 809                                         rt_setgate() */
 810                                 err = "gateway uses the same route";
 811                                 break;
 812                         default:
 813                                 err = strerror(oerrno);
 814                                 break;
 815                         }
 816                         printf(": %s\n", err);
 817                 }
 818         }
 819         exit(ret != 0);
 820 }
 821
 822 void
 823 inet_makenetandmask(u_long net, struct sockaddr_in *sin, u_long bits)
 824 {
 825         u_long addr, mask = 0;
 826         char *cp;
 827
 828         rtm_addrs |= RTA_NETMASK;
 829         if (net == 0)
 830                 mask = addr = 0;
 831         else if (net < 128) {
 832                 addr = net << IN_CLASSA_NSHIFT;
 833                 mask = IN_CLASSA_NET;
 834         } else if (net < 65536) {
 835                 addr = net << IN_CLASSB_NSHIFT;
 836                 mask = IN_CLASSB_NET;
 837         } else if (net < 16777216L) {
 838                 addr = net << IN_CLASSC_NSHIFT;
 839                 mask = IN_CLASSC_NET;
 840         } else {
 841                 addr = net;
 842                 if ((addr & IN_CLASSA_HOST) == 0)
 843                         mask =  IN_CLASSA_NET;
 844                 else if ((addr & IN_CLASSB_HOST) == 0)
 845                         mask =  IN_CLASSB_NET;
 846                 else if ((addr & IN_CLASSC_HOST) == 0)
 847                         mask =  IN_CLASSC_NET;
 848                 else
 849                         mask = -1;
 850         }
 851         if (bits)
 852                 mask = 0xffffffff << (32 - bits);
 853         sin->sin_addr.s_addr = htonl(addr);
 854         sin = &so_mask.sin;
 855         sin->sin_addr.s_addr = htonl(mask);
 856         sin->sin_len = 0;
 857         sin->sin_family = 0;
 858         cp = (char *)(&sin->sin_addr + 1);
 859         while (*--cp == 0 && cp > (char *)sin)
 860                 ;
 861         sin->sin_len = 1 + cp - (char *)sin;
 862 }
 863
 864 #ifdef INET6
 865 /*
 866  * XXX the function may need more improvement...
 867  */
 868 static int
 869 inet6_makenetandmask(struct sockaddr_in6 *sin6, char *plen)
 870 {
 871         struct in6_addr in6;
 872
 873         if (!plen) {
 874                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 875                     sin6->sin6_scope_id == 0) {
 876                         plen = "0";
 877                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 878                         /* aggregatable global unicast - RFC2374 */
 879                         memset(&in6, 0, sizeof(in6));
 880                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
 881                                     &in6.s6_addr[8], 8))
 882                                 plen = "64";
 883                 }
 884         }
 885
 886         if (!plen || strcmp(plen, "128") == 0)
 887                 return(1);
 888         rtm_addrs |= RTA_NETMASK;
 889         prefixlen(plen);
 890         return(0);
 891 }
 892 #endif
 893
 894 /*
 895  * Interpret an argument as a network address of some kind,
 896  * returning 1 if a host address, 0 if a network address.
 897  */
 898 int
 899 getaddr(int which, char *s, struct hostent **hpp)
 900 {
 901         sup su;
 902         struct hostent *hp;
 903         struct netent *np;
 904         u_long val;
 905         char *q;
 906         int afamily;  /* local copy of af so we can change it */
 907
 908         if (af == 0) {
 909                 af = AF_INET;
 910                 aflen = sizeof(struct sockaddr_in);
 911         }
 912         afamily = af;
 913         rtm_addrs |= which;
 914         switch (which) {
 915         case RTA_DST:
 916                 su = &so_dst;
 917                 break;
 918         case RTA_GATEWAY:
 919                 su = &so_gate;
 920                 if (iflag) {
 921                         struct ifaddrs *ifap, *ifa;
 922                         struct sockaddr_dl *sdl = NULL;
 923
 924                         if (getifaddrs(&ifap))
 925                                 err(1, "getifaddrs");
 926
 927                         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 928                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 929                                         continue;
 930
 931                                 if (strcmp(s, ifa->ifa_name))
 932                                         continue;
 933
 934                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 935                         }
 936                         /* If we found it, then use it */
 937                         if (sdl) {
 938                                 /*
 939                                  * Copy is safe since we have a
 940                                  * sockaddr_storage member in sockunion{}.
 941                                  * Note that we need to copy before calling
 942                                  * freeifaddrs().
 943                                  */
 944                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 945                         }
 946                         freeifaddrs(ifap);
 947                         if (sdl)
 948                                 return(1);
 949                 }
 950                 break;
 951         case RTA_NETMASK:
 952                 su = &so_mask;
 953                 break;
 954         case RTA_GENMASK:
 955                 su = &so_genmask;
 956                 break;
 957         case RTA_IFP:
 958                 su = &so_ifp;
 959                 afamily = AF_LINK;
 960                 break;
 961         case RTA_IFA:
 962                 su = &so_ifa;
 963                 break;
 964         default:
 965                 usage("internal error");
 966                 /*NOTREACHED*/
 967         }
 968         su->sa.sa_len = aflen;
 969         su->sa.sa_family = afamily; /* cases that don't want it have left
 970                                        already */
 971         if (strcmp(s, "default") == 0) {
 972                 /*
 973                  * Default is net 0.0.0.0/0
 974                  */
 975                 switch (which) {
 976                 case RTA_DST:
 977                         forcenet++;
 978                         /* bzero(su, sizeof(*su)); *//* for readability */
 979                         getaddr(RTA_NETMASK, s, 0);
 980                         break;
 981                 case RTA_NETMASK:
 982                 case RTA_GENMASK:
 983                         /* bzero(su, sizeof(*su)); *//* for readability */
 984                         break;
 985                 }
 986                 return(0);
 987         }
 988         switch (afamily) {
 989 #ifdef INET6
 990         case AF_INET6:
 991         {
 992                 struct addrinfo hints, *res;
 993
 994                 q = NULL;
 995                 if (which == RTA_DST && (q = strchr(s, '/')) != NULL)
 996                         *q = '\0';
 997                 memset(&hints, 0, sizeof(hints));
 998                 hints.ai_family = afamily;      /*AF_INET6*/
 999                 hints.ai_flags = AI_NUMERICHOST;
1000                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
1001                 if (getaddrinfo(s, "0", &hints, &res) != 0 ||
1002                     res->ai_family != AF_INET6 ||
1003                     res->ai_addrlen != sizeof(su->sin6)) {
1004                         fprintf(stderr, "%s: bad value\n", s);
1005                         exit(1);
1006                 }
1007                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
1008 #ifdef __KAME__
1009                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
1010                      IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) &&
1011                     su->sin6.sin6_scope_id) {
1012                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1013                                 htons(su->sin6.sin6_scope_id);
1014                         su->sin6.sin6_scope_id = 0;
1015                 }
1016 #endif
1017                 freeaddrinfo(res);
1018                 if (q != NULL)
1019                         *q++ = '/';
1020                 if (which == RTA_DST)
1021                         return(inet6_makenetandmask(&su->sin6, q));
1022                 return(0);
1023         }
1024 #endif /* INET6 */
1025
1026 #ifdef NS
1027         case AF_NS:
1028                 if (which == RTA_DST) {
1029                         extern short ns_bh[3];
1030                         struct sockaddr_ns *sms = &(so_mask.sns);
1031                         memset(sms, 0, sizeof(*sms));
1032                         sms->sns_family = 0;
1033                         sms->sns_len = 6;
1034                         sms->sns_addr.x_net = *(union ns_net *)ns_bh;
1035                         rtm_addrs |= RTA_NETMASK;
1036                 }
1037                 su->sns.sns_addr = ns_addr(s);
1038                 return(!ns_nullhost(su->sns.sns_addr));
1039 #endif
1040
1041
1042         case AF_APPLETALK:
1043                 if (!atalk_aton(s, &su->sat.sat_addr))
1044                         errx(EX_NOHOST, "bad address: %s", s);
1045                 rtm_addrs |= RTA_NETMASK;
1046                 return(forcehost || su->sat.sat_addr.s_node != 0);
1047
1048         case AF_LINK:
1049                 link_addr(s, &su->sdl);
1050                 return(1);
1051
1052
1053         case PF_ROUTE:
1054                 su->sa.sa_len = sizeof(*su);
1055                 sockaddr(s, &su->sa);
1056                 return(1);
1057
1058         case AF_INET:
1059         default:
1060                 break;
1061         }
1062
1063         if (hpp == NULL)
1064                 hpp = &hp;
1065         *hpp = NULL;
1066
1067         q = strchr(s,'/');
1068         if (q && which == RTA_DST) {
1069                 *q = '\0';
1070                 if ((val = inet_network(s)) != INADDR_NONE) {
1071                         inet_makenetandmask(
1072                                 val, &su->sin, strtoul(q+1, 0, 0));
1073                         return(0);
1074                 }
1075                 *q = '/';
1076         }
1077         if ((which != RTA_DST || forcenet == 0) &&
1078             inet_aton(s, &su->sin.sin_addr)) {
1079                 val = su->sin.sin_addr.s_addr;
1080                 if (which != RTA_DST ||
1081                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1082                         return(1);
1083                 else {
1084                         val = ntohl(val);
1085                         goto netdone;
1086                 }
1087         }
1088         if (which == RTA_DST && forcehost == 0 &&
1089             ((val = inet_network(s)) != INADDR_NONE ||
1090             ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
1091 netdone:
1092                 inet_makenetandmask(val, &su->sin, 0);
1093                 return(0);
1094         }
1095         hp = gethostbyname(s);
1096         if (hp) {
1097                 *hpp = hp;
1098                 su->sin.sin_family = hp->h_addrtype;
1099                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1100                     MIN(hp->h_length, sizeof(su->sin.sin_addr)));
1101                 return(1);
1102         }
1103         errx(EX_NOHOST, "bad address: %s", s);
1104 }
1105
1106 int
1107 prefixlen(char *s)
1108 {
1109         int len = atoi(s), q, r;
1110         int max;
1111         char *p;
1112
1113         rtm_addrs |= RTA_NETMASK;
1114         switch (af) {
1115 #ifdef INET6
1116         case AF_INET6:
1117                 max = 128;
1118                 p = (char *)&so_mask.sin6.sin6_addr;
1119                 break;
1120 #endif
1121         case AF_INET:
1122                 max = 32;
1123                 p = (char *)&so_mask.sin.sin_addr;
1124                 break;
1125         default:
1126                 fprintf(stderr, "prefixlen not supported in this af\n");
1127                 exit(1);
1128                 /*NOTREACHED*/
1129         }
1130
1131         if (len < 0 || max < len) {
1132                 fprintf(stderr, "%s: bad value\n", s);
1133                 exit(1);
1134         }
1135
1136         q = len >> 3;
1137         r = len & 7;
1138         so_mask.sa.sa_family = af;
1139         so_mask.sa.sa_len = aflen;
1140         memset((void *)p, 0, max / 8);
1141         if (q > 0)
1142                 memset((void *)p, 0xff, q);
1143         if (r > 0)
1144                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1145         if (len == max)
1146                 return(-1);
1147         else
1148                 return(len);
1149 }
1150
1151 #ifdef NS
1152 short ns_nullh[] = {0,0,0};
1153 short ns_bh[] = {-1,-1,-1};
1154
1155 char *
1156 ns_print(struct sockaddr_ns *sns)
1157 {
1158         struct ns_addr work;
1159         union { union ns_net net_e; u_long long_e; } net;
1160         u_short port;
1161         static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25];
1162         char *host = "";
1163         char *p;
1164         u_char *q;
1165
1166         work = sns->sns_addr;
1167         port = ntohs(work.x_port);
1168         work.x_port = 0;
1169         net.net_e  = work.x_net;
1170         if (ns_nullhost(work) && net.long_e == 0) {
1171                 if (!port)
1172                         return("*.*");
1173                 sprintf(mybuf, "*.%XH", port);
1174                 return(mybuf);
1175         }
1176
1177         if (memcmp(ns_bh, work.x_host.c_host, 6) == 0)
1178                 host = "any";
1179         else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0)
1180                 host = "*";
1181         else {
1182                 q = work.x_host.c_host;
1183                 sprintf(chost, "%02X%02X%02X%02X%02X%02XH",
1184                         q[0], q[1], q[2], q[3], q[4], q[5]);
1185                 for (p = chost; *p == '0' && p < chost + 12; p++)
1186                         /* void */;
1187                 host = p;
1188         }
1189         if (port)
1190                 sprintf(cport, ".%XH", htons(port));
1191         else
1192                 *cport = 0;
1193
1194         snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s",
1195                         (unsigned long)ntohl(net.long_e),
1196                         host, cport);
1197         return(mybuf);
1198 }
1199 #endif
1200
1201 void
1202 interfaces(void)
1203 {
1204         size_t needed;
1205         int mib[6];
1206         char *buf, *lim, *next;
1207         struct rt_msghdr *rtm;
1208
1209         mib[0] = CTL_NET;
1210         mib[1] = PF_ROUTE;
1211         mib[2] = 0;             /* protocol */
1212         mib[3] = 0;             /* wildcard address family */
1213         mib[4] = NET_RT_IFLIST;
1214         mib[5] = 0;             /* no flags */
1215         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1216                 err(EX_OSERR, "route-sysctl-estimate");
1217         if ((buf = malloc(needed)) == NULL)
1218                 errx(EX_OSERR, "malloc failed");
1219         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1220                 err(EX_OSERR, "actual retrieval of interface table");
1221         lim = buf + needed;
1222         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1223                 rtm = (struct rt_msghdr *)next;
1224                 print_rtmsg(rtm, rtm->rtm_msglen);
1225         }
1226 }
1227
1228 void
1229 monitor(void)
1230 {
1231         int n;
1232         char msg[2048];
1233
1234         verbose = 1;
1235         if (debugonly) {
1236                 interfaces();
1237                 exit(0);
1238         }
1239         for (;;) {
1240                 time_t now;
1241                 n = read(s, msg, 2048);
1242                 now = time(NULL);
1243                 printf("\ngot message of size %d on %s", n, ctime(&now));
1244                 print_rtmsg((struct rt_msghdr *)msg, n);
1245         }
1246 }
1247
1248 struct {
1249         struct  rt_msghdr m_rtm;
1250         char    m_space[512];
1251 } m_rtmsg;
1252
1253 int
1254 rtmsg(int cmd, int flags)
1255 {
1256         static int seq;
1257         int rlen;
1258         char *cp = m_rtmsg.m_space;
1259         int l;
1260
1261 #define NEXTADDR(w, u) \
1262         if (rtm_addrs & (w)) {\
1263             l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\
1264             if (verbose) sodump(&(u),"u");\
1265         }
1266
1267         errno = 0;
1268         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1269         if (cmd == 'a')
1270                 cmd = RTM_ADD;
1271         else if (cmd == 'c')
1272                 cmd = RTM_CHANGE;
1273         else if (cmd == 'g') {
1274                 cmd = RTM_GET;
1275                 if (so_ifp.sa.sa_family == 0) {
1276                         so_ifp.sa.sa_family = AF_LINK;
1277                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1278                         rtm_addrs |= RTA_IFP;
1279                 }
1280         } else
1281                 cmd = RTM_DELETE;
1282 #define rtm m_rtmsg.m_rtm
1283         rtm.rtm_type = cmd;
1284         rtm.rtm_flags = flags;
1285         rtm.rtm_version = RTM_VERSION;
1286         rtm.rtm_seq = ++seq;
1287         rtm.rtm_addrs = rtm_addrs;
1288         rtm.rtm_rmx = rt_metrics;
1289         rtm.rtm_inits = rtm_inits;
1290
1291         if (rtm_addrs & RTA_NETMASK)
1292                 mask_addr();
1293         NEXTADDR(RTA_DST, so_dst);
1294         NEXTADDR(RTA_GATEWAY, so_gate);
1295         NEXTADDR(RTA_NETMASK, so_mask);
1296         NEXTADDR(RTA_GENMASK, so_genmask);
1297         NEXTADDR(RTA_IFP, so_ifp);
1298         NEXTADDR(RTA_IFA, so_ifa);
1299         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1300         if (verbose)
1301                 print_rtmsg(&rtm, l);
1302         if (debugonly)
1303                 return(0);
1304         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1305                 warn("writing to routing socket");
1306                 return(-1);
1307         }
1308         if (cmd == RTM_GET) {
1309                 do {
1310                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1311                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1312                 if (l < 0)
1313                         warn("read from routing socket");
1314                 else
1315                         print_getmsg(&rtm, l);
1316         }
1317 #undef rtm
1318         return(0);
1319 }
1320
1321 void
1322 mask_addr(void)
1323 {
1324         int olen = so_mask.sa.sa_len;
1325         char *cp1 = olen + (char *)&so_mask, *cp2;
1326
1327         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1328                 if (*--cp1 != 0) {
1329                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1330                         break;
1331                 }
1332         if ((rtm_addrs & RTA_DST) == 0)
1333                 return;
1334         switch (so_dst.sa.sa_family) {
1335 #ifdef NS
1336         case AF_NS:
1337 #endif
1338         case AF_INET:
1339 #ifdef INET6
1340         case AF_INET6:
1341 #endif
1342         case AF_APPLETALK:
1343         case 0:
1344                 return;
1345         }
1346         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1347         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1348         while (cp2 > cp1)
1349                 *--cp2 = 0;
1350         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1351         while (cp1 > so_dst.sa.sa_data)
1352                 *--cp1 &= *--cp2;
1353 }
1354
1355 char *msgtypes[] = {
1356         "",
1357         "RTM_ADD: Add Route",
1358         "RTM_DELETE: Delete Route",
1359         "RTM_CHANGE: Change Metrics or flags",
1360         "RTM_GET: Report Metrics",
1361         "RTM_LOSING: Kernel Suspects Partitioning",
1362         "RTM_REDIRECT: Told to use different route",
1363         "RTM_MISS: Lookup failed on this address",
1364         "RTM_LOCK: fix specified metrics",
1365         "RTM_OLDADD: caused by SIOCADDRT",
1366         "RTM_OLDDEL: caused by SIOCDELRT",
1367         "RTM_RESOLVE: Route created by cloning",
1368         "RTM_NEWADDR: address being added to iface",
1369         "RTM_DELADDR: address being removed from iface",
1370         "RTM_IFINFO: iface status change",
1371         "RTM_NEWMADDR: new multicast group membership on iface",
1372         "RTM_DELMADDR: multicast group membership removed from iface",
1373         "RTM_IFANNOUNCE: interface arrival/departure",
1374         0,
1375 };
1376
1377 char metricnames[] =
1378 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1379 "\1mtu";
1380 char routeflags[] =
1381 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1382 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1383 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1384 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1385 char ifnetflags[] =
1386 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1387 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1388 "\017LINK2\020MULTICAST";
1389 char addrnames[] =
1390 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1391
1392 void
1393 print_rtmsg(struct rt_msghdr *rtm, int msglen)
1394 {
1395         struct if_msghdr *ifm;
1396         struct ifa_msghdr *ifam;
1397 #ifdef RTM_NEWMADDR
1398         struct ifma_msghdr *ifmam;
1399 #endif
1400         struct if_announcemsghdr *ifan;
1401
1402         if (verbose == 0)
1403                 return;
1404         if (rtm->rtm_version != RTM_VERSION) {
1405                 printf("routing message version %d not understood\n",
1406                     rtm->rtm_version);
1407                 return;
1408         }
1409         if (msgtypes[rtm->rtm_type] != NULL)
1410                 printf("%s: ", msgtypes[rtm->rtm_type]);
1411         else
1412                 printf("#%d: ", rtm->rtm_type);
1413         printf("len %d, ", rtm->rtm_msglen);
1414         switch (rtm->rtm_type) {
1415         case RTM_IFINFO:
1416                 ifm = (struct if_msghdr *)rtm;
1417                 printf("if# %d, flags:", ifm->ifm_index);
1418                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1419                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1420                 break;
1421         case RTM_NEWADDR:
1422         case RTM_DELADDR:
1423                 ifam = (struct ifa_msghdr *)rtm;
1424                 printf("metric %d, flags:", ifam->ifam_metric);
1425                 bprintf(stdout, ifam->ifam_flags, routeflags);
1426                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1427                 break;
1428 #ifdef RTM_NEWMADDR
1429         case RTM_NEWMADDR:
1430         case RTM_DELMADDR:
1431                 ifmam = (struct ifma_msghdr *)rtm;
1432                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1433                 break;
1434 #endif
1435         case RTM_IFANNOUNCE:
1436                 ifan = (struct if_announcemsghdr *)rtm;
1437                 printf("if# %d, what: ", ifan->ifan_index);
1438                 switch (ifan->ifan_what) {
1439                 case IFAN_ARRIVAL:
1440                         printf("arrival");
1441                         break;
1442                 case IFAN_DEPARTURE:
1443                         printf("departure");
1444                         break;
1445                 default:
1446                         printf("#%d", ifan->ifan_what);
1447                         break;
1448                 }
1449                 printf("\n");
1450                 break;
1451
1452         default:
1453                 printf("pid: %ld, seq %d, errno %d, flags:",
1454                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1455                 bprintf(stdout, rtm->rtm_flags, routeflags);
1456                 pmsg_common(rtm);
1457         }
1458 }
1459
1460 void
1461 print_getmsg(struct rt_msghdr *rtm, int msglen)
1462 {
1463         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1464         struct sockaddr_dl *ifp = NULL;
1465         struct sockaddr *sa;
1466         char *cp;
1467         int i;
1468
1469         printf("   route to: %s\n", routename(&so_dst.sa));
1470         if (rtm->rtm_version != RTM_VERSION) {
1471                 warnx("routing message version %d not understood",
1472                      rtm->rtm_version);
1473                 return;
1474         }
1475         if (rtm->rtm_msglen > msglen) {
1476                 warnx("message length mismatch, in packet %d, returned %d",
1477                       rtm->rtm_msglen, msglen);
1478         }
1479         if (rtm->rtm_errno)  {
1480                 errno = rtm->rtm_errno;
1481                 warn("message indicates error %d", errno);
1482                 return;
1483         }
1484         cp = ((char *)(rtm + 1));
1485         if (rtm->rtm_addrs)
1486                 for (i = 1; i; i <<= 1)
1487                         if (i & rtm->rtm_addrs) {
1488                                 sa = (struct sockaddr *)cp;
1489                                 switch (i) {
1490                                 case RTA_DST:
1491                                         dst = sa;
1492                                         break;
1493                                 case RTA_GATEWAY:
1494                                         gate = sa;
1495                                         break;
1496                                 case RTA_NETMASK:
1497                                         mask = sa;
1498                                         break;
1499                                 case RTA_IFP:
1500                                         if (sa->sa_family == AF_LINK &&
1501                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1502                                                 ifp = (struct sockaddr_dl *)sa;
1503                                         break;
1504                                 }
1505                                 ADVANCE(cp, sa);
1506                         }
1507         if (dst && mask)
1508                 mask->sa_family = dst->sa_family;       /* XXX */
1509         if (dst)
1510                 printf("destination: %s\n", routename(dst));
1511         if (mask) {
1512                 int savenflag = nflag;
1513
1514                 nflag = 1;
1515                 printf("       mask: %s\n", routename(mask));
1516                 nflag = savenflag;
1517         }
1518         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1519                 printf("    gateway: %s\n", routename(gate));
1520         if (ifp)
1521                 printf("  interface: %.*s\n",
1522                     ifp->sdl_nlen, ifp->sdl_data);
1523         printf("      flags: ");
1524         bprintf(stdout, rtm->rtm_flags, routeflags);
1525
1526 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1527 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1528
1529         printf("\n%s\n", "\
1530  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
1531         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1532         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1533         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1534         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1535         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1536         printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1537         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1538         if (rtm->rtm_rmx.rmx_expire)
1539                 rtm->rtm_rmx.rmx_expire -= time(0);
1540         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1541 #undef lock
1542 #undef msec
1543 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1544         if (verbose)
1545                 pmsg_common(rtm);
1546         else if (rtm->rtm_addrs &~ RTA_IGN) {
1547                 printf("sockaddrs: ");
1548                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1549                 putchar('\n');
1550         }
1551 #undef  RTA_IGN
1552 }
1553
1554 void
1555 pmsg_common(struct rt_msghdr *rtm)
1556 {
1557         printf("\nlocks: ");
1558         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1559         printf(" inits: ");
1560         bprintf(stdout, rtm->rtm_inits, metricnames);
1561         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1562 }
1563
1564 void
1565 pmsg_addrs(char *cp, int addrs)
1566 {
1567         struct sockaddr *sa;
1568         int i;
1569
1570         if (addrs == 0) {
1571                 putchar('\n');
1572                 return;
1573         }
1574         printf("\nsockaddrs: ");
1575         bprintf(stdout, addrs, addrnames);
1576         putchar('\n');
1577         for (i = 1; i; i <<= 1)
1578                 if (i & addrs) {
1579                         sa = (struct sockaddr *)cp;
1580                         printf(" %s", routename(sa));
1581                         ADVANCE(cp, sa);
1582                 }
1583         putchar('\n');
1584         fflush(stdout);
1585 }
1586
1587 void
1588 bprintf(FILE *fp, int b, u_char *s)
1589 {
1590         int i;
1591         int gotsome = 0;
1592
1593         if (b == 0)
1594                 return;
1595         while ((i = *s++) != 0) {
1596                 if (b & (1 << (i-1))) {
1597                         if (gotsome == 0)
1598                                 i = '<';
1599                         else
1600                                 i = ',';
1601                         putc(i, fp);
1602                         gotsome = 1;
1603                         for (; (i = *s) > 32; s++)
1604                                 putc(i, fp);
1605                 } else
1606                         while (*s > 32)
1607                                 s++;
1608         }
1609         if (gotsome)
1610                 putc('>', fp);
1611 }
1612
1613 int
1614 keyword(char *cp)
1615 {
1616         struct keytab *kt = keywords;
1617
1618         while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1619                 kt++;
1620         return(kt->kt_i);
1621 }
1622
1623 void
1624 sodump(sup su, char *which)
1625 {
1626         switch (su->sa.sa_family) {
1627         case AF_LINK:
1628                 printf("%s: link %s; ",
1629                     which, link_ntoa(&su->sdl));
1630                 break;
1631         case AF_INET:
1632                 printf("%s: inet %s; ",
1633                     which, inet_ntoa(su->sin.sin_addr));
1634                 break;
1635         case AF_APPLETALK:
1636                 printf("%s: atalk %s; ",
1637                     which, atalk_ntoa(su->sat.sat_addr));
1638                 break;
1639 #ifdef NS
1640         case AF_NS:
1641                 printf("%s: xns %s; ",
1642                     which, ns_ntoa(su->sns.sns_addr));
1643                 break;
1644 #endif
1645         }
1646         fflush(stdout);
1647 }
1648
1649 /* States*/
1650 #define VIRGIN  0
1651 #define GOTONE  1
1652 #define GOTTWO  2
1653 /* Inputs */
1654 #define DIGIT   (4*0)
1655 #define END     (4*1)
1656 #define DELIM   (4*2)
1657
1658 void
1659 sockaddr(char *addr, struct sockaddr *sa)
1660 {
1661         char *cp = (char *)sa;
1662         int size = sa->sa_len;
1663         char *cplim = cp + size;
1664         int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1665
1666         memset(cp, 0, size);
1667         cp++;
1668         do {
1669                 if ((*addr >= '0') && (*addr <= '9')) {
1670                         new = *addr - '0';
1671                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1672                         new = *addr - 'a' + 10;
1673                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1674                         new = *addr - 'A' + 10;
1675                 } else if (*addr == 0)
1676                         state |= END;
1677                 else
1678                         state |= DELIM;
1679                 addr++;
1680                 switch (state /* | INPUT */) {
1681                 case GOTTWO | DIGIT:
1682                         *cp++ = byte; /*FALLTHROUGH*/
1683                 case VIRGIN | DIGIT:
1684                         state = GOTONE; byte = new; continue;
1685                 case GOTONE | DIGIT:
1686                         state = GOTTWO; byte = new + (byte << 4); continue;
1687                 default: /* | DELIM */
1688                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1689                 case GOTONE | END:
1690                 case GOTTWO | END:
1691                         *cp++ = byte; /* FALLTHROUGH */
1692                 case VIRGIN | END:
1693                         break;
1694                 }
1695                 break;
1696         } while (cp < cplim);
1697         sa->sa_len = cp - (char *)sa;
1698 }
1699
1700 int
1701 atalk_aton(const char *text, struct at_addr *addr)
1702 {
1703         u_int net, node;
1704
1705         if (sscanf(text, "%u.%u", &net, &node) != 2
1706             || net > 0xffff || node > 0xff)
1707                 return(0);
1708         addr->s_net = htons(net);
1709         addr->s_node = node;
1710         return(1);
1711 }
1712
1713 char *
1714 atalk_ntoa(struct at_addr at)
1715 {
1716         static char buf[20];
1717
1718         snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1719         return(buf);
1720 }