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 1.6 2004/03/23 17:56:29 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     locking, lockrest, debugonly;
  95 struct  rt_metrics rt_metrics;
  96 u_long  rtm_inits;
  97 uid_t   uid;
  98
  99 int      atalk_aton(const char *, struct at_addr *);
 100 char    *atalk_ntoa(struct at_addr);
 101 char    *netname(struct sockaddr *);
 102 void     flushroutes(int, char **);
 103 void     newroute(int, char **);
 104 void     monitor(void);
 105 void     sockaddr(char *, struct sockaddr *);
 106 void     sodump(sup, char *);
 107 void     bprintf(FILE *, int, u_char *);
 108 void     print_getmsg(struct rt_msghdr *, int);
 109 void     print_rtmsg(struct rt_msghdr *, int);
 110 void     pmsg_common(struct rt_msghdr *);
 111 void     pmsg_addrs(char *, int);
 112 void     mask_addr(void);
 113 #ifdef INET6
 114 static int inet6_makenetandmask(struct sockaddr_in6 *, char *);
 115 #endif
 116 int      getaddr(int, char *, struct hostent **);
 117 int      rtmsg(int, int);
 118 int      x25_makemask();
 119 int      prefixlen(char *);
 120 extern  char *iso_ntoa();
 121
 122 void usage(const char *) __dead2;
 123
 124 void
 125 usage(const char *cp)
 126 {
 127         if (cp)
 128                 warnx("bad keyword: %s", cp);
 129         fprintf(stderr, "usage: route [-dnqtv] command [[modifiers] args]\n");
 130         exit(EX_USAGE);
 131         /* NOTREACHED */
 132 }
 133
 134 #define ROUNDUP(a) \
 135         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 136 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 137
 138 int
 139 main(int argc, char **argv)
 140 {
 141         int ch;
 142
 143         if (argc < 2)
 144                 usage((char *)NULL);
 145
 146         while ((ch = getopt(argc, argv, "nqdtv")) != -1)
 147                 switch(ch) {
 148                 case 'n':
 149                         nflag = 1;
 150                         break;
 151                 case 'q':
 152                         qflag = 1;
 153                         break;
 154                 case 'v':
 155                         verbose = 1;
 156                         break;
 157                 case 't':
 158                         tflag = 1;
 159                         break;
 160                 case 'd':
 161                         debugonly = 1;
 162                         break;
 163                 case '?':
 164                 default:
 165                         usage((char *)NULL);
 166                 }
 167         argc -= optind;
 168         argv += optind;
 169
 170         pid = getpid();
 171         uid = geteuid();
 172         if (tflag)
 173                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 174         else
 175                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 176         if (s < 0)
 177                 err(EX_OSERR, "socket");
 178         if (*argv)
 179                 switch (keyword(*argv)) {
 180                 case K_GET:
 181                         uid = 0;
 182                         /* FALLTHROUGH */
 183
 184                 case K_CHANGE:
 185                 case K_ADD:
 186                 case K_DELETE:
 187                         newroute(argc, argv);
 188                         /* NOTREACHED */
 189
 190                 case K_SHOW:
 191                         show(argc, argv);
 192                         return(0);
 193
 194                 case K_MONITOR:
 195                         monitor();
 196                         /* NOTREACHED */
 197
 198                 case K_FLUSH:
 199                         flushroutes(argc, argv);
 200                         exit(0);
 201                         /* NOTREACHED */
 202                 }
 203         usage(*argv);
 204         /* NOTREACHED */
 205 }
 206
 207 /*
 208  * Purge all entries in the routing tables not
 209  * associated with network interfaces.
 210  */
 211 void
 212 flushroutes(int argc, char **argv)
 213 {
 214         size_t needed;
 215         int mib[6], rlen, seqno;
 216         char *buf, *next, *lim;
 217         struct rt_msghdr *rtm;
 218
 219         if (uid) {
 220                 errx(EX_NOPERM, "must be root to alter routing table");
 221         }
 222         shutdown(s, 0); /* Don't want to read back our messages */
 223         if (argc > 1) {
 224                 argv++;
 225                 if (argc == 2 && **argv == '-')
 226                     switch (keyword(*argv + 1)) {
 227                         case K_INET:
 228                                 af = AF_INET;
 229                                 break;
 230 #ifdef INET6
 231                         case K_INET6:
 232                                 af = AF_INET6;
 233                                 break;
 234 #endif
 235                         case K_ATALK:
 236                                 af = AF_APPLETALK;
 237                                 break;
 238 #ifdef NS
 239                         case K_XNS:
 240                                 af = AF_NS;
 241                                 break;
 242 #endif
 243                         case K_LINK:
 244                                 af = AF_LINK;
 245                                 break;
 246                         default:
 247                                 goto bad;
 248                 } else
 249 bad:                    usage(*argv);
 250         }
 251         mib[0] = CTL_NET;
 252         mib[1] = PF_ROUTE;
 253         mib[2] = 0;             /* protocol */
 254         mib[3] = 0;             /* wildcard address family */
 255         mib[4] = NET_RT_DUMP;
 256         mib[5] = 0;             /* no flags */
 257         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 258                 err(EX_OSERR, "route-sysctl-estimate");
 259         if ((buf = malloc(needed)) == NULL)
 260                 errx(EX_OSERR, "malloc failed");
 261         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
 262                 err(EX_OSERR, "route-sysctl-get");
 263         lim = buf + needed;
 264         if (verbose)
 265                 printf("Examining routing table from sysctl\n");
 266         seqno = 0;              /* ??? */
 267         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 268                 rtm = (struct rt_msghdr *)next;
 269                 if (verbose)
 270                         print_rtmsg(rtm, rtm->rtm_msglen);
 271                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 272                         continue;
 273                 if (af) {
 274                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 275
 276                         if (sa->sa_family != af)
 277                                 continue;
 278                 }
 279                 if (debugonly)
 280                         continue;
 281                 rtm->rtm_type = RTM_DELETE;
 282                 rtm->rtm_seq = seqno;
 283                 rlen = write(s, next, rtm->rtm_msglen);
 284                 if (rlen < (int)rtm->rtm_msglen) {
 285                         warn("write to routing socket");
 286                         printf("got only %d for rlen\n", rlen);
 287                         break;
 288                 }
 289                 seqno++;
 290                 if (qflag)
 291                         continue;
 292                 if (verbose)
 293                         print_rtmsg(rtm, rlen);
 294                 else {
 295                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 296                         printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 297                             routename(sa) : netname(sa));
 298                         sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) +
 299                             (char *)sa);
 300                         printf("%-20.20s ", routename(sa));
 301                         printf("done\n");
 302                 }
 303         }
 304 }
 305
 306 char *
 307 routename(struct sockaddr *sa)
 308 {
 309         char *cp;
 310         static char line[MAXHOSTNAMELEN + 1];
 311         struct hostent *hp;
 312         static char domain[MAXHOSTNAMELEN + 1];
 313         static int first = 1;
 314 #ifdef NS
 315         char *ns_print();
 316 #endif
 317
 318         if (first) {
 319                 first = 0;
 320                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 321                     (cp = strchr(domain, '.'))) {
 322                         domain[MAXHOSTNAMELEN] = '\0';
 323                         strcpy(domain, cp + 1);
 324                 } else
 325                         domain[0] = 0;
 326         }
 327
 328         if (sa->sa_len == 0)
 329                 strcpy(line, "default");
 330         else switch (sa->sa_family) {
 331
 332         case AF_INET:
 333             {   struct in_addr in;
 334                 in = ((struct sockaddr_in *)sa)->sin_addr;
 335
 336                 cp = 0;
 337                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 338                         cp = "default";
 339                 if (cp == 0 && !nflag) {
 340                         hp = gethostbyaddr((char *)&in, sizeof(struct in_addr),
 341                                 AF_INET);
 342                         if (hp) {
 343                                 if ((cp = strchr(hp->h_name, '.')) &&
 344                                     !strcmp(cp + 1, domain))
 345                                         *cp = 0;
 346                                 cp = hp->h_name;
 347                         }
 348                 }
 349                 if (cp) {
 350                         strncpy(line, cp, sizeof(line) - 1);
 351                         line[sizeof(line) - 1] = '\0';
 352                 } else
 353                         sprintf(line, "%s", inet_ntoa(in));
 354                 break;
 355             }
 356
 357 #ifdef INET6
 358         case AF_INET6:
 359         {
 360                 struct sockaddr_in6 sin6; /* use static var for safety */
 361                 int niflags = 0;
 362 #ifdef NI_WITHSCOPEID
 363                 niflags = NI_WITHSCOPEID;
 364 #endif
 365
 366                 memset(&sin6, 0, sizeof(sin6));
 367                 memcpy(&sin6, sa, sa->sa_len);
 368                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 369                 sin6.sin6_family = AF_INET6;
 370 #ifdef __KAME__
 371                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 372                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 373                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 374                     sin6.sin6_scope_id == 0) {
 375                         sin6.sin6_scope_id =
 376                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 377                         sin6.sin6_addr.s6_addr[2] = 0;
 378                         sin6.sin6_addr.s6_addr[3] = 0;
 379                 }
 380 #endif
 381                 if (nflag)
 382                         niflags |= NI_NUMERICHOST;
 383                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 384                     line, sizeof(line), NULL, 0, niflags) != 0)
 385                         strncpy(line, "invalid", sizeof(line));
 386
 387                 return(line);
 388         }
 389 #endif
 390
 391         case AF_APPLETALK:
 392                 snprintf(line, sizeof(line), "atalk %s",
 393                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 394                 break;
 395
 396 #ifdef NS
 397         case AF_NS:
 398                 return(ns_print((struct sockaddr_ns *)sa));
 399 #endif
 400
 401         case AF_LINK:
 402                 return(link_ntoa((struct sockaddr_dl *)sa));
 403
 404         default:
 405             {   u_short *s = (u_short *)sa;
 406                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 407                 char *cp = line + sprintf(line, "(%d)", sa->sa_family);
 408                 char *cpe = line + sizeof(line);
 409
 410                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 411                         cp += snprintf(cp, cpe - cp, " %x", *s);
 412                 break;
 413             }
 414         }
 415         return(line);
 416 }
 417
 418 /*
 419  * Return the name of the network whose address is given.
 420  * The address is assumed to be that of a net or subnet, not a host.
 421  */
 422 char *
 423 netname(struct sockaddr *sa)
 424 {
 425         char *cp = 0;
 426         static char line[MAXHOSTNAMELEN + 1];
 427         struct netent *np = 0;
 428         u_long net, mask;
 429         u_long i;
 430         int subnetshift;
 431 #ifdef NS
 432         char *ns_print();
 433 #endif
 434
 435         switch (sa->sa_family) {
 436
 437         case AF_INET:
 438             {   struct in_addr in;
 439                 in = ((struct sockaddr_in *)sa)->sin_addr;
 440
 441                 i = in.s_addr = ntohl(in.s_addr);
 442                 if (in.s_addr == 0)
 443                         cp = "default";
 444                 else if (!nflag) {
 445                         if (IN_CLASSA(i)) {
 446                                 mask = IN_CLASSA_NET;
 447                                 subnetshift = 8;
 448                         } else if (IN_CLASSB(i)) {
 449                                 mask = IN_CLASSB_NET;
 450                                 subnetshift = 8;
 451                         } else {
 452                                 mask = IN_CLASSC_NET;
 453                                 subnetshift = 4;
 454                         }
 455                         /*
 456                          * If there are more bits than the standard mask
 457                          * would suggest, subnets must be in use.
 458                          * Guess at the subnet mask, assuming reasonable
 459                          * width subnet fields.
 460                          */
 461                         while (in.s_addr &~ mask)
 462                                 mask = (long)mask >> subnetshift;
 463                         net = in.s_addr & mask;
 464                         while ((mask & 1) == 0)
 465                                 mask >>= 1, net >>= 1;
 466                         np = getnetbyaddr(net, AF_INET);
 467                         if (np)
 468                                 cp = np->n_name;
 469                 }
 470 #define C(x)    (unsigned)((x) & 0xff)
 471                 if (cp)
 472                         strncpy(line, cp, sizeof(line));
 473                 else if ((in.s_addr & 0xffffff) == 0)
 474                         sprintf(line, "%u", C(in.s_addr >> 24));
 475                 else if ((in.s_addr & 0xffff) == 0)
 476                         sprintf(line, "%u.%u", C(in.s_addr >> 24),
 477                             C(in.s_addr >> 16));
 478                 else if ((in.s_addr & 0xff) == 0)
 479                         sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 480                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 481                 else
 482                         sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 483                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 484                             C(in.s_addr));
 485 #undef C
 486                 break;
 487             }
 488
 489 #ifdef INET6
 490         case AF_INET6:
 491         {
 492                 struct sockaddr_in6 sin6; /* use static var for safety */
 493                 int niflags = 0;
 494 #ifdef NI_WITHSCOPEID
 495                 niflags = NI_WITHSCOPEID;
 496 #endif
 497
 498                 memset(&sin6, 0, sizeof(sin6));
 499                 memcpy(&sin6, sa, sa->sa_len);
 500                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 501                 sin6.sin6_family = AF_INET6;
 502 #ifdef __KAME__
 503                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 504                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 505                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 506                     sin6.sin6_scope_id == 0) {
 507                         sin6.sin6_scope_id =
 508                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 509                         sin6.sin6_addr.s6_addr[2] = 0;
 510                         sin6.sin6_addr.s6_addr[3] = 0;
 511                 }
 512 #endif
 513                 if (nflag)
 514                         niflags |= NI_NUMERICHOST;
 515                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 516                     line, sizeof(line), NULL, 0, niflags) != 0)
 517                         strncpy(line, "invalid", sizeof(line));
 518
 519                 return(line);
 520         }
 521 #endif
 522
 523         case AF_APPLETALK:
 524                 snprintf(line, sizeof(line), "atalk %s",
 525                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 526                 break;
 527
 528 #ifdef NS
 529         case AF_NS:
 530                 return(ns_print((struct sockaddr_ns *)sa));
 531                 break;
 532 #endif
 533
 534         case AF_LINK:
 535                 return(link_ntoa((struct sockaddr_dl *)sa));
 536
 537
 538         default:
 539             {   u_short *s = (u_short *)sa->sa_data;
 540                 u_short *slim = s + ((sa->sa_len + 1)>>1);
 541                 char *cp = line + sprintf(line, "af %d:", sa->sa_family);
 542                 char *cpe = line + sizeof(line);
 543
 544                 while (s < slim && cp < cpe)
 545                         cp += snprintf(cp, cpe - cp, " %x", *s++);
 546                 break;
 547             }
 548         }
 549         return(line);
 550 }
 551
 552 void
 553 set_metric(char *value, int key)
 554 {
 555         int flag = 0;
 556         u_long noval, *valp = &noval;
 557
 558         switch (key) {
 559 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 560         caseof(K_MTU, RTV_MTU, rmx_mtu);
 561         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 562         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 563         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 564         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 565         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 566         caseof(K_RTT, RTV_RTT, rmx_rtt);
 567         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 568         }
 569         rtm_inits |= flag;
 570         if (lockrest || locking)
 571                 rt_metrics.rmx_locks |= flag;
 572         if (locking)
 573                 locking = 0;
 574         *valp = atoi(value);
 575 }
 576
 577 void
 578 newroute(int argc, char **argv)
 579 {
 580         char *cmd, *dest = "", *gateway = "", *err;
 581         int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 582         int key;
 583         struct hostent *hp = 0;
 584
 585         if (uid) {
 586                 errx(EX_NOPERM, "must be root to alter routing table");
 587         }
 588         cmd = argv[0];
 589         if (*cmd != 'g')
 590                 shutdown(s, 0); /* Don't want to read back our messages */
 591         while (--argc > 0) {
 592                 if (**(++argv)== '-') {
 593                         switch (key = keyword(1 + *argv)) {
 594                         case K_LINK:
 595                                 af = AF_LINK;
 596                                 aflen = sizeof(struct sockaddr_dl);
 597                                 break;
 598                         case K_INET:
 599                                 af = AF_INET;
 600                                 aflen = sizeof(struct sockaddr_in);
 601                                 break;
 602 #ifdef INET6
 603                         case K_INET6:
 604                                 af = AF_INET6;
 605                                 aflen = sizeof(struct sockaddr_in6);
 606                                 break;
 607 #endif
 608                         case K_ATALK:
 609                                 af = AF_APPLETALK;
 610                                 aflen = sizeof(struct sockaddr_at);
 611                                 break;
 612                         case K_SA:
 613                                 af = PF_ROUTE;
 614                                 aflen = sizeof(union sockunion);
 615                                 break;
 616 #ifdef NS
 617                         case K_XNS:
 618                                 af = AF_NS;
 619                                 aflen = sizeof(struct sockaddr_ns);
 620                                 break;
 621 #endif
 622                         case K_IFACE:
 623                         case K_INTERFACE:
 624                                 iflag++;
 625                                 break;
 626                         case K_NOSTATIC:
 627                                 flags &= ~RTF_STATIC;
 628                                 break;
 629                         case K_LLINFO:
 630                                 flags |= RTF_LLINFO;
 631                                 break;
 632                         case K_LOCK:
 633                                 locking = 1;
 634                                 break;
 635                         case K_LOCKREST:
 636                                 lockrest = 1;
 637                                 break;
 638                         case K_HOST:
 639                                 forcehost++;
 640                                 break;
 641                         case K_REJECT:
 642                                 flags |= RTF_REJECT;
 643                                 break;
 644                         case K_BLACKHOLE:
 645                                 flags |= RTF_BLACKHOLE;
 646                                 break;
 647                         case K_PROTO1:
 648                                 flags |= RTF_PROTO1;
 649                                 break;
 650                         case K_PROTO2:
 651                                 flags |= RTF_PROTO2;
 652                                 break;
 653                         case K_PROXY:
 654                                 proxy = 1;
 655                                 break;
 656                         case K_CLONING:
 657                                 flags |= RTF_CLONING;
 658                                 break;
 659                         case K_XRESOLVE:
 660                                 flags |= RTF_XRESOLVE;
 661                                 break;
 662                         case K_STATIC:
 663                                 flags |= RTF_STATIC;
 664                                 break;
 665                         case K_IFA:
 666                                 if (!--argc)
 667                                         usage((char *)NULL);
 668                                 getaddr(RTA_IFA, *++argv, 0);
 669                                 break;
 670                         case K_IFP:
 671                                 if (!--argc)
 672                                         usage((char *)NULL);
 673                                 getaddr(RTA_IFP, *++argv, 0);
 674                                 break;
 675                         case K_GENMASK:
 676                                 if (!--argc)
 677                                         usage((char *)NULL);
 678                                 getaddr(RTA_GENMASK, *++argv, 0);
 679                                 break;
 680                         case K_GATEWAY:
 681                                 if (!--argc)
 682                                         usage((char *)NULL);
 683                                 getaddr(RTA_GATEWAY, *++argv, 0);
 684                                 break;
 685                         case K_DST:
 686                                 if (!--argc)
 687                                         usage((char *)NULL);
 688                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 689                                 dest = *argv;
 690                                 break;
 691                         case K_NETMASK:
 692                                 if (!--argc)
 693                                         usage((char *)NULL);
 694                                 getaddr(RTA_NETMASK, *++argv, 0);
 695                                 /* FALLTHROUGH */
 696                         case K_NET:
 697                                 forcenet++;
 698                                 break;
 699                         case K_PREFIXLEN:
 700                                 if (!--argc)
 701                                         usage((char *)NULL);
 702                                 if (prefixlen(*++argv) == -1) {
 703                                         forcenet = 0;
 704                                         ishost = 1;
 705                                 } else {
 706                                         forcenet = 1;
 707                                         ishost = 0;
 708                                 }
 709                                 break;
 710                         case K_MTU:
 711                         case K_HOPCOUNT:
 712                         case K_EXPIRE:
 713                         case K_RECVPIPE:
 714                         case K_SENDPIPE:
 715                         case K_SSTHRESH:
 716                         case K_RTT:
 717                         case K_RTTVAR:
 718                                 if (!--argc)
 719                                         usage((char *)NULL);
 720                                 set_metric(*++argv, key);
 721                                 break;
 722                         default:
 723                                 usage(1+*argv);
 724                         }
 725                 } else {
 726                         if ((rtm_addrs & RTA_DST) == 0) {
 727                                 dest = *argv;
 728                                 ishost = getaddr(RTA_DST, *argv, &hp);
 729                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 730                                 gateway = *argv;
 731                                 getaddr(RTA_GATEWAY, *argv, &hp);
 732                         } else {
 733                                 getaddr(RTA_NETMASK, *argv, 0);
 734                                 forcenet = 1;
 735                         }
 736                 }
 737         }
 738         if (forcehost) {
 739                 ishost = 1;
 740 #ifdef INET6
 741                 if (af == AF_INET6) {
 742                         rtm_addrs &= ~RTA_NETMASK;
 743                         memset((void *)&so_mask, 0, sizeof(so_mask));
 744                 }
 745 #endif
 746         }
 747         if (forcenet)
 748                 ishost = 0;
 749         flags |= RTF_UP;
 750         if (ishost)
 751                 flags |= RTF_HOST;
 752         if (iflag == 0)
 753                 flags |= RTF_GATEWAY;
 754         if (proxy) {
 755                 so_dst.sinarp.sin_other = SIN_PROXY;
 756                 flags |= RTF_ANNOUNCE;
 757         }
 758         for (attempts = 1; ; attempts++) {
 759                 errno = 0;
 760                 if ((ret = rtmsg(*cmd, flags)) == 0)
 761                         break;
 762                 if (errno != ENETUNREACH && errno != ESRCH)
 763                         break;
 764                 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 765                         hp->h_addr_list++;
 766                         memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0],
 767                             MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
 768                 } else
 769                         break;
 770         }
 771         if (*cmd == 'g')
 772                 exit(0);
 773         if (!qflag) {
 774                 oerrno = errno;
 775                 printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 776                 if (*gateway) {
 777                         printf(": gateway %s", gateway);
 778                         if (attempts > 1 && ret == 0 && af == AF_INET)
 779                             printf(" (%s)",
 780                                 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
 781                 }
 782                 if (ret == 0) {
 783                         printf("\n");
 784                 } else {
 785                         switch (oerrno) {
 786                         case ESRCH:
 787                                 err = "not in table";
 788                                 break;
 789                         case EBUSY:
 790                                 err = "entry in use";
 791                                 break;
 792                         case ENOBUFS:
 793                                 err = "routing table overflow";
 794                                 break;
 795                         case EDQUOT: /* handle recursion avoidance in
 796                                         rt_setgate() */
 797                                 err = "gateway uses the same route";
 798                                 break;
 799                         default:
 800                                 err = strerror(oerrno);
 801                                 break;
 802                         }
 803                         printf(": %s\n", err);
 804                 }
 805         }
 806         exit(ret != 0);
 807 }
 808
 809 void
 810 inet_makenetandmask(u_long net, struct sockaddr_in *sin, u_long bits)
 811 {
 812         u_long addr, mask = 0;
 813         char *cp;
 814
 815         rtm_addrs |= RTA_NETMASK;
 816         if (net == 0)
 817                 mask = addr = 0;
 818         else if (net < 128) {
 819                 addr = net << IN_CLASSA_NSHIFT;
 820                 mask = IN_CLASSA_NET;
 821         } else if (net < 65536) {
 822                 addr = net << IN_CLASSB_NSHIFT;
 823                 mask = IN_CLASSB_NET;
 824         } else if (net < 16777216L) {
 825                 addr = net << IN_CLASSC_NSHIFT;
 826                 mask = IN_CLASSC_NET;
 827         } else {
 828                 addr = net;
 829                 if ((addr & IN_CLASSA_HOST) == 0)
 830                         mask =  IN_CLASSA_NET;
 831                 else if ((addr & IN_CLASSB_HOST) == 0)
 832                         mask =  IN_CLASSB_NET;
 833                 else if ((addr & IN_CLASSC_HOST) == 0)
 834                         mask =  IN_CLASSC_NET;
 835                 else
 836                         mask = -1;
 837         }
 838         if (bits)
 839                 mask = 0xffffffff << (32 - bits);
 840         sin->sin_addr.s_addr = htonl(addr);
 841         sin = &so_mask.sin;
 842         sin->sin_addr.s_addr = htonl(mask);
 843         sin->sin_len = 0;
 844         sin->sin_family = 0;
 845         cp = (char *)(&sin->sin_addr + 1);
 846         while (*--cp == 0 && cp > (char *)sin)
 847                 ;
 848         sin->sin_len = 1 + cp - (char *)sin;
 849 }
 850
 851 #ifdef INET6
 852 /*
 853  * XXX the function may need more improvement...
 854  */
 855 static int
 856 inet6_makenetandmask(struct sockaddr_in6 *sin6, char *plen)
 857 {
 858         struct in6_addr in6;
 859
 860         if (!plen) {
 861                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 862                     sin6->sin6_scope_id == 0) {
 863                         plen = "0";
 864                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 865                         /* aggregatable global unicast - RFC2374 */
 866                         memset(&in6, 0, sizeof(in6));
 867                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
 868                                     &in6.s6_addr[8], 8))
 869                                 plen = "64";
 870                 }
 871         }
 872
 873         if (!plen || strcmp(plen, "128") == 0)
 874                 return(1);
 875         rtm_addrs |= RTA_NETMASK;
 876         prefixlen(plen);
 877         return(0);
 878 }
 879 #endif
 880
 881 /*
 882  * Interpret an argument as a network address of some kind,
 883  * returning 1 if a host address, 0 if a network address.
 884  */
 885 int
 886 getaddr(int which, char *s, struct hostent **hpp)
 887 {
 888         sup su;
 889         struct hostent *hp;
 890         struct netent *np;
 891         u_long val;
 892         char *q;
 893         int afamily;  /* local copy of af so we can change it */
 894
 895         if (af == 0) {
 896                 af = AF_INET;
 897                 aflen = sizeof(struct sockaddr_in);
 898         }
 899         afamily = af;
 900         rtm_addrs |= which;
 901         switch (which) {
 902         case RTA_DST:
 903                 su = &so_dst;
 904                 break;
 905         case RTA_GATEWAY:
 906                 su = &so_gate;
 907                 if (iflag) {
 908                         struct ifaddrs *ifap, *ifa;
 909                         struct sockaddr_dl *sdl = NULL;
 910
 911                         if (getifaddrs(&ifap))
 912                                 err(1, "getifaddrs");
 913
 914                         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 915                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 916                                         continue;
 917
 918                                 if (strcmp(s, ifa->ifa_name))
 919                                         continue;
 920
 921                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 922                         }
 923                         /* If we found it, then use it */
 924                         if (sdl) {
 925                                 /*
 926                                  * Copy is safe since we have a
 927                                  * sockaddr_storage member in sockunion{}.
 928                                  * Note that we need to copy before calling
 929                                  * freeifaddrs().
 930                                  */
 931                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 932                         }
 933                         freeifaddrs(ifap);
 934                         if (sdl)
 935                                 return(1);
 936                 }
 937                 break;
 938         case RTA_NETMASK:
 939                 su = &so_mask;
 940                 break;
 941         case RTA_GENMASK:
 942                 su = &so_genmask;
 943                 break;
 944         case RTA_IFP:
 945                 su = &so_ifp;
 946                 afamily = AF_LINK;
 947                 break;
 948         case RTA_IFA:
 949                 su = &so_ifa;
 950                 break;
 951         default:
 952                 usage("internal error");
 953                 /*NOTREACHED*/
 954         }
 955         su->sa.sa_len = aflen;
 956         su->sa.sa_family = afamily; /* cases that don't want it have left
 957                                        already */
 958         if (strcmp(s, "default") == 0) {
 959                 /*
 960                  * Default is net 0.0.0.0/0
 961                  */
 962                 switch (which) {
 963                 case RTA_DST:
 964                         forcenet++;
 965                         /* bzero(su, sizeof(*su)); *//* for readability */
 966                         getaddr(RTA_NETMASK, s, 0);
 967                         break;
 968                 case RTA_NETMASK:
 969                 case RTA_GENMASK:
 970                         /* bzero(su, sizeof(*su)); *//* for readability */
 971                         break;
 972                 }
 973                 return(0);
 974         }
 975         switch (afamily) {
 976 #ifdef INET6
 977         case AF_INET6:
 978         {
 979                 struct addrinfo hints, *res;
 980
 981                 q = NULL;
 982                 if (which == RTA_DST && (q = strchr(s, '/')) != NULL)
 983                         *q = '\0';
 984                 memset(&hints, 0, sizeof(hints));
 985                 hints.ai_family = afamily;      /*AF_INET6*/
 986                 hints.ai_flags = AI_NUMERICHOST;
 987                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
 988                 if (getaddrinfo(s, "0", &hints, &res) != 0 ||
 989                     res->ai_family != AF_INET6 ||
 990                     res->ai_addrlen != sizeof(su->sin6)) {
 991                         fprintf(stderr, "%s: bad value\n", s);
 992                         exit(1);
 993                 }
 994                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
 995 #ifdef __KAME__
 996                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
 997                      IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) &&
 998                     su->sin6.sin6_scope_id) {
 999                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1000                                 htons(su->sin6.sin6_scope_id);
1001                         su->sin6.sin6_scope_id = 0;
1002                 }
1003 #endif
1004                 freeaddrinfo(res);
1005                 if (q != NULL)
1006                         *q++ = '/';
1007                 if (which == RTA_DST)
1008                         return(inet6_makenetandmask(&su->sin6, q));
1009                 return(0);
1010         }
1011 #endif /* INET6 */
1012
1013 #ifdef NS
1014         case AF_NS:
1015                 if (which == RTA_DST) {
1016                         extern short ns_bh[3];
1017                         struct sockaddr_ns *sms = &(so_mask.sns);
1018                         memset(sms, 0, sizeof(*sms));
1019                         sms->sns_family = 0;
1020                         sms->sns_len = 6;
1021                         sms->sns_addr.x_net = *(union ns_net *)ns_bh;
1022                         rtm_addrs |= RTA_NETMASK;
1023                 }
1024                 su->sns.sns_addr = ns_addr(s);
1025                 return(!ns_nullhost(su->sns.sns_addr));
1026 #endif
1027
1028
1029         case AF_APPLETALK:
1030                 if (!atalk_aton(s, &su->sat.sat_addr))
1031                         errx(EX_NOHOST, "bad address: %s", s);
1032                 rtm_addrs |= RTA_NETMASK;
1033                 return(forcehost || su->sat.sat_addr.s_node != 0);
1034
1035         case AF_LINK:
1036                 link_addr(s, &su->sdl);
1037                 return(1);
1038
1039
1040         case PF_ROUTE:
1041                 su->sa.sa_len = sizeof(*su);
1042                 sockaddr(s, &su->sa);
1043                 return(1);
1044
1045         case AF_INET:
1046         default:
1047                 break;
1048         }
1049
1050         if (hpp == NULL)
1051                 hpp = &hp;
1052         *hpp = NULL;
1053
1054         q = strchr(s,'/');
1055         if (q && which == RTA_DST) {
1056                 *q = '\0';
1057                 if ((val = inet_network(s)) != INADDR_NONE) {
1058                         inet_makenetandmask(
1059                                 val, &su->sin, strtoul(q+1, 0, 0));
1060                         return(0);
1061                 }
1062                 *q = '/';
1063         }
1064         if ((which != RTA_DST || forcenet == 0) &&
1065             inet_aton(s, &su->sin.sin_addr)) {
1066                 val = su->sin.sin_addr.s_addr;
1067                 if (which != RTA_DST ||
1068                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1069                         return(1);
1070                 else {
1071                         val = ntohl(val);
1072                         goto netdone;
1073                 }
1074         }
1075         if (which == RTA_DST && forcehost == 0 &&
1076             ((val = inet_network(s)) != INADDR_NONE ||
1077             ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
1078 netdone:
1079                 inet_makenetandmask(val, &su->sin, 0);
1080                 return(0);
1081         }
1082         hp = gethostbyname(s);
1083         if (hp) {
1084                 *hpp = hp;
1085                 su->sin.sin_family = hp->h_addrtype;
1086                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1087                     MIN(hp->h_length, sizeof(su->sin.sin_addr)));
1088                 return(1);
1089         }
1090         errx(EX_NOHOST, "bad address: %s", s);
1091 }
1092
1093 int
1094 prefixlen(char *s)
1095 {
1096         int len = atoi(s), q, r;
1097         int max;
1098         char *p;
1099
1100         rtm_addrs |= RTA_NETMASK;
1101         switch (af) {
1102 #ifdef INET6
1103         case AF_INET6:
1104                 max = 128;
1105                 p = (char *)&so_mask.sin6.sin6_addr;
1106                 break;
1107 #endif
1108         case AF_INET:
1109                 max = 32;
1110                 p = (char *)&so_mask.sin.sin_addr;
1111                 break;
1112         default:
1113                 fprintf(stderr, "prefixlen not supported in this af\n");
1114                 exit(1);
1115                 /*NOTREACHED*/
1116         }
1117
1118         if (len < 0 || max < len) {
1119                 fprintf(stderr, "%s: bad value\n", s);
1120                 exit(1);
1121         }
1122
1123         q = len >> 3;
1124         r = len & 7;
1125         so_mask.sa.sa_family = af;
1126         so_mask.sa.sa_len = aflen;
1127         memset((void *)p, 0, max / 8);
1128         if (q > 0)
1129                 memset((void *)p, 0xff, q);
1130         if (r > 0)
1131                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1132         if (len == max)
1133                 return(-1);
1134         else
1135                 return(len);
1136 }
1137
1138 #ifdef NS
1139 short ns_nullh[] = {0,0,0};
1140 short ns_bh[] = {-1,-1,-1};
1141
1142 char *
1143 ns_print(struct sockaddr_ns *sns)
1144 {
1145         struct ns_addr work;
1146         union { union ns_net net_e; u_long long_e; } net;
1147         u_short port;
1148         static char mybuf[50+MAXHOSTNAMELEN], cport[10], chost[25];
1149         char *host = "";
1150         char *p;
1151         u_char *q;
1152
1153         work = sns->sns_addr;
1154         port = ntohs(work.x_port);
1155         work.x_port = 0;
1156         net.net_e  = work.x_net;
1157         if (ns_nullhost(work) && net.long_e == 0) {
1158                 if (!port)
1159                         return("*.*");
1160                 sprintf(mybuf, "*.%XH", port);
1161                 return(mybuf);
1162         }
1163
1164         if (memcmp(ns_bh, work.x_host.c_host, 6) == 0)
1165                 host = "any";
1166         else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0)
1167                 host = "*";
1168         else {
1169                 q = work.x_host.c_host;
1170                 sprintf(chost, "%02X%02X%02X%02X%02X%02XH",
1171                         q[0], q[1], q[2], q[3], q[4], q[5]);
1172                 for (p = chost; *p == '0' && p < chost + 12; p++)
1173                         /* void */;
1174                 host = p;
1175         }
1176         if (port)
1177                 sprintf(cport, ".%XH", htons(port));
1178         else
1179                 *cport = 0;
1180
1181         snprintf(mybuf, sizeof(mybuf), "%lxH.%s%s",
1182                         (unsigned long)ntohl(net.long_e),
1183                         host, cport);
1184         return(mybuf);
1185 }
1186 #endif
1187
1188 void
1189 interfaces(void)
1190 {
1191         size_t needed;
1192         int mib[6];
1193         char *buf, *lim, *next;
1194         struct rt_msghdr *rtm;
1195
1196         mib[0] = CTL_NET;
1197         mib[1] = PF_ROUTE;
1198         mib[2] = 0;             /* protocol */
1199         mib[3] = 0;             /* wildcard address family */
1200         mib[4] = NET_RT_IFLIST;
1201         mib[5] = 0;             /* no flags */
1202         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1203                 err(EX_OSERR, "route-sysctl-estimate");
1204         if ((buf = malloc(needed)) == NULL)
1205                 errx(EX_OSERR, "malloc failed");
1206         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1207                 err(EX_OSERR, "actual retrieval of interface table");
1208         lim = buf + needed;
1209         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1210                 rtm = (struct rt_msghdr *)next;
1211                 print_rtmsg(rtm, rtm->rtm_msglen);
1212         }
1213 }
1214
1215 void
1216 monitor(void)
1217 {
1218         int n;
1219         char msg[2048];
1220
1221         verbose = 1;
1222         if (debugonly) {
1223                 interfaces();
1224                 exit(0);
1225         }
1226         for (;;) {
1227                 time_t now;
1228                 n = read(s, msg, 2048);
1229                 now = time(NULL);
1230                 printf("\ngot message of size %d on %s", n, ctime(&now));
1231                 print_rtmsg((struct rt_msghdr *)msg, n);
1232         }
1233 }
1234
1235 struct {
1236         struct  rt_msghdr m_rtm;
1237         char    m_space[512];
1238 } m_rtmsg;
1239
1240 int
1241 rtmsg(int cmd, int flags)
1242 {
1243         static int seq;
1244         int rlen;
1245         char *cp = m_rtmsg.m_space;
1246         int l;
1247
1248 #define NEXTADDR(w, u) \
1249         if (rtm_addrs & (w)) {\
1250             l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\
1251             if (verbose) sodump(&(u),"u");\
1252         }
1253
1254         errno = 0;
1255         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1256         if (cmd == 'a')
1257                 cmd = RTM_ADD;
1258         else if (cmd == 'c')
1259                 cmd = RTM_CHANGE;
1260         else if (cmd == 'g') {
1261                 cmd = RTM_GET;
1262                 if (so_ifp.sa.sa_family == 0) {
1263                         so_ifp.sa.sa_family = AF_LINK;
1264                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1265                         rtm_addrs |= RTA_IFP;
1266                 }
1267         } else
1268                 cmd = RTM_DELETE;
1269 #define rtm m_rtmsg.m_rtm
1270         rtm.rtm_type = cmd;
1271         rtm.rtm_flags = flags;
1272         rtm.rtm_version = RTM_VERSION;
1273         rtm.rtm_seq = ++seq;
1274         rtm.rtm_addrs = rtm_addrs;
1275         rtm.rtm_rmx = rt_metrics;
1276         rtm.rtm_inits = rtm_inits;
1277
1278         if (rtm_addrs & RTA_NETMASK)
1279                 mask_addr();
1280         NEXTADDR(RTA_DST, so_dst);
1281         NEXTADDR(RTA_GATEWAY, so_gate);
1282         NEXTADDR(RTA_NETMASK, so_mask);
1283         NEXTADDR(RTA_GENMASK, so_genmask);
1284         NEXTADDR(RTA_IFP, so_ifp);
1285         NEXTADDR(RTA_IFA, so_ifa);
1286         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1287         if (verbose)
1288                 print_rtmsg(&rtm, l);
1289         if (debugonly)
1290                 return(0);
1291         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1292                 warn("writing to routing socket");
1293                 return(-1);
1294         }
1295         if (cmd == RTM_GET) {
1296                 do {
1297                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1298                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1299                 if (l < 0)
1300                         warn("read from routing socket");
1301                 else
1302                         print_getmsg(&rtm, l);
1303         }
1304 #undef rtm
1305         return(0);
1306 }
1307
1308 void
1309 mask_addr(void)
1310 {
1311         int olen = so_mask.sa.sa_len;
1312         char *cp1 = olen + (char *)&so_mask, *cp2;
1313
1314         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1315                 if (*--cp1 != 0) {
1316                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1317                         break;
1318                 }
1319         if ((rtm_addrs & RTA_DST) == 0)
1320                 return;
1321         switch (so_dst.sa.sa_family) {
1322 #ifdef NS
1323         case AF_NS:
1324 #endif
1325         case AF_INET:
1326 #ifdef INET6
1327         case AF_INET6:
1328 #endif
1329         case AF_APPLETALK:
1330         case 0:
1331                 return;
1332         }
1333         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1334         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1335         while (cp2 > cp1)
1336                 *--cp2 = 0;
1337         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1338         while (cp1 > so_dst.sa.sa_data)
1339                 *--cp1 &= *--cp2;
1340 }
1341
1342 char *msgtypes[] = {
1343         "",
1344         "RTM_ADD: Add Route",
1345         "RTM_DELETE: Delete Route",
1346         "RTM_CHANGE: Change Metrics or flags",
1347         "RTM_GET: Report Metrics",
1348         "RTM_LOSING: Kernel Suspects Partitioning",
1349         "RTM_REDIRECT: Told to use different route",
1350         "RTM_MISS: Lookup failed on this address",
1351         "RTM_LOCK: fix specified metrics",
1352         "RTM_OLDADD: caused by SIOCADDRT",
1353         "RTM_OLDDEL: caused by SIOCDELRT",
1354         "RTM_RESOLVE: Route created by cloning",
1355         "RTM_NEWADDR: address being added to iface",
1356         "RTM_DELADDR: address being removed from iface",
1357         "RTM_IFINFO: iface status change",
1358         "RTM_NEWMADDR: new multicast group membership on iface",
1359         "RTM_DELMADDR: multicast group membership removed from iface",
1360         "RTM_IFANNOUNCE: interface arrival/departure",
1361         0,
1362 };
1363
1364 char metricnames[] =
1365 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1366 "\1mtu";
1367 char routeflags[] =
1368 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1369 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1370 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1371 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1372 char ifnetflags[] =
1373 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1374 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1375 "\017LINK2\020MULTICAST";
1376 char addrnames[] =
1377 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1378
1379 void
1380 print_rtmsg(struct rt_msghdr *rtm, int msglen)
1381 {
1382         struct if_msghdr *ifm;
1383         struct ifa_msghdr *ifam;
1384 #ifdef RTM_NEWMADDR
1385         struct ifma_msghdr *ifmam;
1386 #endif
1387         struct if_announcemsghdr *ifan;
1388
1389         if (verbose == 0)
1390                 return;
1391         if (rtm->rtm_version != RTM_VERSION) {
1392                 printf("routing message version %d not understood\n",
1393                     rtm->rtm_version);
1394                 return;
1395         }
1396         if (msgtypes[rtm->rtm_type] != NULL)
1397                 printf("%s: ", msgtypes[rtm->rtm_type]);
1398         else
1399                 printf("#%d: ", rtm->rtm_type);
1400         printf("len %d, ", rtm->rtm_msglen);
1401         switch (rtm->rtm_type) {
1402         case RTM_IFINFO:
1403                 ifm = (struct if_msghdr *)rtm;
1404                 printf("if# %d, flags:", ifm->ifm_index);
1405                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1406                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1407                 break;
1408         case RTM_NEWADDR:
1409         case RTM_DELADDR:
1410                 ifam = (struct ifa_msghdr *)rtm;
1411                 printf("metric %d, flags:", ifam->ifam_metric);
1412                 bprintf(stdout, ifam->ifam_flags, routeflags);
1413                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1414                 break;
1415 #ifdef RTM_NEWMADDR
1416         case RTM_NEWMADDR:
1417         case RTM_DELMADDR:
1418                 ifmam = (struct ifma_msghdr *)rtm;
1419                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1420                 break;
1421 #endif
1422         case RTM_IFANNOUNCE:
1423                 ifan = (struct if_announcemsghdr *)rtm;
1424                 printf("if# %d, what: ", ifan->ifan_index);
1425                 switch (ifan->ifan_what) {
1426                 case IFAN_ARRIVAL:
1427                         printf("arrival");
1428                         break;
1429                 case IFAN_DEPARTURE:
1430                         printf("departure");
1431                         break;
1432                 default:
1433                         printf("#%d", ifan->ifan_what);
1434                         break;
1435                 }
1436                 printf("\n");
1437                 break;
1438
1439         default:
1440                 printf("pid: %ld, seq %d, errno %d, flags:",
1441                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1442                 bprintf(stdout, rtm->rtm_flags, routeflags);
1443                 pmsg_common(rtm);
1444         }
1445 }
1446
1447 void
1448 print_getmsg(struct rt_msghdr *rtm, int msglen)
1449 {
1450         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1451         struct sockaddr_dl *ifp = NULL;
1452         struct sockaddr *sa;
1453         char *cp;
1454         int i;
1455
1456         printf("   route to: %s\n", routename(&so_dst.sa));
1457         if (rtm->rtm_version != RTM_VERSION) {
1458                 warnx("routing message version %d not understood",
1459                      rtm->rtm_version);
1460                 return;
1461         }
1462         if (rtm->rtm_msglen > msglen) {
1463                 warnx("message length mismatch, in packet %d, returned %d",
1464                       rtm->rtm_msglen, msglen);
1465         }
1466         if (rtm->rtm_errno)  {
1467                 errno = rtm->rtm_errno;
1468                 warn("message indicates error %d", errno);
1469                 return;
1470         }
1471         cp = ((char *)(rtm + 1));
1472         if (rtm->rtm_addrs)
1473                 for (i = 1; i; i <<= 1)
1474                         if (i & rtm->rtm_addrs) {
1475                                 sa = (struct sockaddr *)cp;
1476                                 switch (i) {
1477                                 case RTA_DST:
1478                                         dst = sa;
1479                                         break;
1480                                 case RTA_GATEWAY:
1481                                         gate = sa;
1482                                         break;
1483                                 case RTA_NETMASK:
1484                                         mask = sa;
1485                                         break;
1486                                 case RTA_IFP:
1487                                         if (sa->sa_family == AF_LINK &&
1488                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1489                                                 ifp = (struct sockaddr_dl *)sa;
1490                                         break;
1491                                 }
1492                                 ADVANCE(cp, sa);
1493                         }
1494         if (dst && mask)
1495                 mask->sa_family = dst->sa_family;       /* XXX */
1496         if (dst)
1497                 printf("destination: %s\n", routename(dst));
1498         if (mask) {
1499                 int savenflag = nflag;
1500
1501                 nflag = 1;
1502                 printf("       mask: %s\n", routename(mask));
1503                 nflag = savenflag;
1504         }
1505         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1506                 printf("    gateway: %s\n", routename(gate));
1507         if (ifp)
1508                 printf("  interface: %.*s\n",
1509                     ifp->sdl_nlen, ifp->sdl_data);
1510         printf("      flags: ");
1511         bprintf(stdout, rtm->rtm_flags, routeflags);
1512
1513 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1514 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1515
1516         printf("\n%s\n", "\
1517  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
1518         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1519         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1520         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1521         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1522         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1523         printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1524         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1525         if (rtm->rtm_rmx.rmx_expire)
1526                 rtm->rtm_rmx.rmx_expire -= time(0);
1527         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1528 #undef lock
1529 #undef msec
1530 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1531         if (verbose)
1532                 pmsg_common(rtm);
1533         else if (rtm->rtm_addrs &~ RTA_IGN) {
1534                 printf("sockaddrs: ");
1535                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1536                 putchar('\n');
1537         }
1538 #undef  RTA_IGN
1539 }
1540
1541 void
1542 pmsg_common(struct rt_msghdr *rtm)
1543 {
1544         printf("\nlocks: ");
1545         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1546         printf(" inits: ");
1547         bprintf(stdout, rtm->rtm_inits, metricnames);
1548         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1549 }
1550
1551 void
1552 pmsg_addrs(char *cp, int addrs)
1553 {
1554         struct sockaddr *sa;
1555         int i;
1556
1557         if (addrs == 0) {
1558                 putchar('\n');
1559                 return;
1560         }
1561         printf("\nsockaddrs: ");
1562         bprintf(stdout, addrs, addrnames);
1563         putchar('\n');
1564         for (i = 1; i; i <<= 1)
1565                 if (i & addrs) {
1566                         sa = (struct sockaddr *)cp;
1567                         printf(" %s", routename(sa));
1568                         ADVANCE(cp, sa);
1569                 }
1570         putchar('\n');
1571         fflush(stdout);
1572 }
1573
1574 void
1575 bprintf(FILE *fp, int b, u_char *s)
1576 {
1577         int i;
1578         int gotsome = 0;
1579
1580         if (b == 0)
1581                 return;
1582         while ((i = *s++) != 0) {
1583                 if (b & (1 << (i-1))) {
1584                         if (gotsome == 0)
1585                                 i = '<';
1586                         else
1587                                 i = ',';
1588                         putc(i, fp);
1589                         gotsome = 1;
1590                         for (; (i = *s) > 32; s++)
1591                                 putc(i, fp);
1592                 } else
1593                         while (*s > 32)
1594                                 s++;
1595         }
1596         if (gotsome)
1597                 putc('>', fp);
1598 }
1599
1600 int
1601 keyword(char *cp)
1602 {
1603         struct keytab *kt = keywords;
1604
1605         while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1606                 kt++;
1607         return(kt->kt_i);
1608 }
1609
1610 void
1611 sodump(sup su, char *which)
1612 {
1613         switch (su->sa.sa_family) {
1614         case AF_LINK:
1615                 printf("%s: link %s; ",
1616                     which, link_ntoa(&su->sdl));
1617                 break;
1618         case AF_INET:
1619                 printf("%s: inet %s; ",
1620                     which, inet_ntoa(su->sin.sin_addr));
1621                 break;
1622         case AF_APPLETALK:
1623                 printf("%s: atalk %s; ",
1624                     which, atalk_ntoa(su->sat.sat_addr));
1625                 break;
1626 #ifdef NS
1627         case AF_NS:
1628                 printf("%s: xns %s; ",
1629                     which, ns_ntoa(su->sns.sns_addr));
1630                 break;
1631 #endif
1632         }
1633         fflush(stdout);
1634 }
1635
1636 /* States*/
1637 #define VIRGIN  0
1638 #define GOTONE  1
1639 #define GOTTWO  2
1640 /* Inputs */
1641 #define DIGIT   (4*0)
1642 #define END     (4*1)
1643 #define DELIM   (4*2)
1644
1645 void
1646 sockaddr(char *addr, struct sockaddr *sa)
1647 {
1648         char *cp = (char *)sa;
1649         int size = sa->sa_len;
1650         char *cplim = cp + size;
1651         int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1652
1653         memset(cp, 0, size);
1654         cp++;
1655         do {
1656                 if ((*addr >= '0') && (*addr <= '9')) {
1657                         new = *addr - '0';
1658                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1659                         new = *addr - 'a' + 10;
1660                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1661                         new = *addr - 'A' + 10;
1662                 } else if (*addr == 0)
1663                         state |= END;
1664                 else
1665                         state |= DELIM;
1666                 addr++;
1667                 switch (state /* | INPUT */) {
1668                 case GOTTWO | DIGIT:
1669                         *cp++ = byte; /*FALLTHROUGH*/
1670                 case VIRGIN | DIGIT:
1671                         state = GOTONE; byte = new; continue;
1672                 case GOTONE | DIGIT:
1673                         state = GOTTWO; byte = new + (byte << 4); continue;
1674                 default: /* | DELIM */
1675                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1676                 case GOTONE | END:
1677                 case GOTTWO | END:
1678                         *cp++ = byte; /* FALLTHROUGH */
1679                 case VIRGIN | END:
1680                         break;
1681                 }
1682                 break;
1683         } while (cp < cplim);
1684         sa->sa_len = cp - (char *)sa;
1685 }
1686
1687 int
1688 atalk_aton(const char *text, struct at_addr *addr)
1689 {
1690         u_int net, node;
1691
1692         if (sscanf(text, "%u.%u", &net, &node) != 2
1693             || net > 0xffff || node > 0xff)
1694                 return(0);
1695         addr->s_net = htons(net);
1696         addr->s_node = node;
1697         return(1);
1698 }
1699
1700 char *
1701 atalk_ntoa(struct at_addr at)
1702 {
1703         static char buf[20];
1704
1705         snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1706         return(buf);
1707 }