route.tproj/route.c

   1 /*
   2  * Copyright (c) 2008-2013 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1983, 1989, 1991, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  */
  60
  61 #include <sys/cdefs.h>
  62
  63 #ifndef lint
  64 __unused static const char copyright[] =
  65 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\
  66         The Regents of the University of California.  All rights reserved.\n";
  67 #endif /* not lint */
  68
  69 #include <sys/param.h>
  70 #include <sys/file.h>
  71 #include <sys/socket.h>
  72 #include <sys/ioctl.h>
  73 #include <sys/sysctl.h>
  74 #include <sys/types.h>
  75
  76 #include <net/if.h>
  77 #include <net/route.h>
  78 #include <net/if_dl.h>
  79 #include <netinet/in.h>
  80 #include <arpa/inet.h>
  81 #include <netdb.h>
  82
  83 #include <ctype.h>
  84 #include <err.h>
  85 #include <errno.h>
  86 #include <paths.h>
  87 #include <stdio.h>
  88 #include <stdlib.h>
  89 #include <string.h>
  90 #include <sysexits.h>
  91 #include <unistd.h>
  92 #include <ifaddrs.h>
  93
  94 struct keytab {
  95         char    *kt_cp;
  96         int     kt_i;
  97 } keywords[] = {
  98 #include "keywords.h"
  99         {0, 0}
 100 };
 101
 102 union   sockunion {
 103         struct  sockaddr sa;
 104         struct  sockaddr_in sin;
 105 #ifdef INET6
 106         struct  sockaddr_in6 sin6;
 107 #endif
 108         struct  sockaddr_dl sdl;
 109         struct  sockaddr_storage ss; /* added to avoid memory overrun */
 110 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
 111
 112 typedef union sockunion *sup;
 113 int     pid, rtm_addrs, uid;
 114 int     s;
 115 int     forcehost, forcenet, doflush, nflag, af, qflag, tflag, keyword();
 116 int     iflag, verbose, aflen = sizeof (struct sockaddr_in);
 117 int     locking, lockrest, debugonly;
 118 struct  rt_metrics rt_metrics;
 119 u_long  rtm_inits;
 120 unsigned int ifscope;
 121
 122 static const char *route_strerror(int);
 123 const char      *routename(), *netname();
 124 void    flushroutes(), newroute(), monitor(), sockaddr(), sodump(), bprintf();
 125 void    print_getmsg(), print_rtmsg(), pmsg_common(), pmsg_addrs(), mask_addr();
 126 int     getaddr(), rtmsg(), x25_makemask();
 127 int     prefixlen();
 128 extern  char *iso_ntoa();
 129
 130 void usage __P((const char *)) __dead2;
 131
 132 void
 133 usage(cp)
 134         const char *cp;
 135 {
 136         if (cp)
 137                 warnx("bad keyword: %s", cp);
 138         (void) fprintf(stderr,
 139             "usage: route [-dnqtv] command [[modifiers] args]\n");
 140         exit(EX_USAGE);
 141         /* NOTREACHED */
 142 }
 143
 144 #define ROUNDUP(a) \
 145         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(uint32_t) - 1))) : sizeof(uint32_t))
 146 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 147
 148 int
 149 main(argc, argv)
 150         int argc;
 151         char **argv;
 152 {
 153         int ch;
 154
 155         if (argc < 2)
 156                 usage((char *)NULL);
 157
 158         while ((ch = getopt(argc, argv, "nqdtv")) != -1)
 159                 switch(ch) {
 160                 case 'n':
 161                         nflag = 1;
 162                         break;
 163                 case 'q':
 164                         qflag = 1;
 165                         break;
 166                 case 'v':
 167                         verbose = 1;
 168                         break;
 169                 case 't':
 170                         tflag = 1;
 171                         break;
 172                 case 'd':
 173                         debugonly = 1;
 174                         break;
 175                 case '?':
 176                 default:
 177                         usage((char *)NULL);
 178                 }
 179         argc -= optind;
 180         argv += optind;
 181
 182         pid = getpid();
 183         uid = geteuid();
 184         if (tflag)
 185                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 186         else
 187                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 188         if (s < 0)
 189                 err(EX_OSERR, "socket");
 190         setuid(uid);
 191         if (*argv)
 192                 switch (keyword(*argv)) {
 193                 case K_GET:
 194                         uid = 0;
 195                         /* FALLTHROUGH */
 196
 197                 case K_CHANGE:
 198                 case K_ADD:
 199                 case K_DELETE:
 200                         newroute(argc, argv);
 201                         exit(0);
 202                         /* NOTREACHED */
 203
 204                 case K_MONITOR:
 205                         monitor();
 206                         /* NOTREACHED */
 207
 208                 case K_FLUSH:
 209                         flushroutes(argc, argv);
 210                         exit(0);
 211                         /* NOTREACHED */
 212                 }
 213         usage(*argv);
 214         /* NOTREACHED */
 215 }
 216
 217 /*
 218  * Purge all entries in the routing tables not
 219  * associated with network interfaces.
 220  */
 221 void
 222 flushroutes(argc, argv)
 223         int argc;
 224         char *argv[];
 225 {
 226         size_t needed;
 227         int mib[6], rlen, seqno;
 228         char *buf, *next, *lim;
 229         register struct rt_msghdr *rtm;
 230
 231         if (uid) {
 232                 errx(EX_NOPERM, "must be root to alter routing table");
 233         }
 234         shutdown(s, 0); /* Don't want to read back our messages */
 235         if (argc > 1) {
 236                 argv++;
 237                 if (argc == 2 && **argv == '-')
 238                     switch (keyword(*argv + 1)) {
 239                         case K_INET:
 240                                 af = AF_INET;
 241                                 break;
 242 #ifdef INET6
 243                         case K_INET6:
 244                                 af = AF_INET6;
 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                 (void) 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                         (void) 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                         (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 301                             routename(sa) : netname(sa));
 302                         sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
 303                         (void) printf("%-20.20s ", routename(sa));
 304                         (void) printf("done\n");
 305                 }
 306         }
 307 }
 308
 309 const char *
 310 routename(sa)
 311         struct sockaddr *sa;
 312 {
 313         register char *cp;
 314         static char line[MAXHOSTNAMELEN + 1];
 315         struct hostent *hp;
 316         static char domain[MAXHOSTNAMELEN + 1];
 317         static int first = 1;
 318
 319         if (first) {
 320                 first = 0;
 321                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 322                     (cp = index(domain, '.'))) {
 323                         domain[MAXHOSTNAMELEN] = '\0';
 324                         (void) memmove(domain, cp + 1, strlen(cp + 1) + 1);
 325                 } else
 326                         domain[0] = 0;
 327         }
 328
 329         if (sa->sa_len == 0)
 330                 strlcpy(line, "default", sizeof(line));
 331         else switch (sa->sa_family) {
 332
 333         case AF_INET:
 334             {   struct in_addr in;
 335                 in = ((struct sockaddr_in *)sa)->sin_addr;
 336
 337                 cp = 0;
 338                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 339                         cp = "default";
 340                 if (cp == 0 && !nflag) {
 341                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 342                                 AF_INET);
 343                         if (hp) {
 344                                 if ((cp = index(hp->h_name, '.')) &&
 345                                     !strcmp(cp + 1, domain))
 346                                         *cp = 0;
 347                                 cp = hp->h_name;
 348                         }
 349                 }
 350                 if (cp) {
 351                         strncpy(line, cp, sizeof(line) - 1);
 352                         line[sizeof(line) - 1] = '\0';
 353                 } else {
 354                         /* XXX - why not inet_ntoa()? */
 355 #define C(x)    (unsigned)((x) & 0xff)
 356                         in.s_addr = ntohl(in.s_addr);
 357                         (void) snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
 358                            C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
 359                 }
 360                 break;
 361             }
 362
 363 #ifdef INET6
 364         case AF_INET6:
 365         {
 366                 struct sockaddr_in6 sin6; /* use static var for safety */
 367                 int niflags = 0;
 368 #ifdef NI_WITHSCOPEID
 369                 niflags = NI_WITHSCOPEID;
 370 #endif
 371
 372                 memset(&sin6, 0, sizeof(sin6));
 373                 memcpy(&sin6, sa, sa->sa_len);
 374                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 375                 sin6.sin6_family = AF_INET6;
 376 #ifdef __KAME__
 377                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 378                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 379                      IN6_IS_ADDR_MC_NODELOCAL(&sin6.sin6_addr) ||
 380                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 381                     sin6.sin6_scope_id == 0) {
 382                         sin6.sin6_scope_id =
 383                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 384                         sin6.sin6_addr.s6_addr[2] = 0;
 385                         sin6.sin6_addr.s6_addr[3] = 0;
 386                 }
 387 #endif
 388                 if (nflag)
 389                         niflags |= NI_NUMERICHOST;
 390                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 391                     line, sizeof(line), NULL, 0, niflags) != 0)
 392                         strncpy(line, "invalid", sizeof(line));
 393
 394                 return(line);
 395         }
 396 #endif
 397
 398         case AF_LINK:
 399                 return (link_ntoa((struct sockaddr_dl *)sa));
 400
 401         default:
 402             {   u_short *s = (u_short *)sa;
 403                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 404                 char *cp = line + snprintf(line, sizeof(line), "(%d)", sa->sa_family);
 405                 char *cpe = line + sizeof(line);
 406
 407                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 408                         cp += snprintf(cp, cpe - cp, " %x", *s);
 409                 break;
 410             }
 411         }
 412         return (line);
 413 }
 414
 415 /*
 416  * Return the name of the network whose address is given.
 417  * The address is assumed to be that of a net or subnet, not a host.
 418  */
 419 const char *
 420 netname(sa)
 421         struct sockaddr *sa;
 422 {
 423         char *cp = 0;
 424         static char line[MAXHOSTNAMELEN + 1];
 425         struct netent *np = 0;
 426         in_addr_t net, mask;
 427         register in_addr_t i;
 428         int subnetshift;
 429
 430         switch (sa->sa_family) {
 431
 432         case AF_INET:
 433             {   struct in_addr in;
 434                 in = ((struct sockaddr_in *)sa)->sin_addr;
 435
 436                 i = in.s_addr = ntohl(in.s_addr);
 437                 if (in.s_addr == 0)
 438                         cp = "default";
 439                 else if (!nflag) {
 440                         if (IN_CLASSA(i)) {
 441                                 mask = IN_CLASSA_NET;
 442                                 subnetshift = 8;
 443                         } else if (IN_CLASSB(i)) {
 444                                 mask = IN_CLASSB_NET;
 445                                 subnetshift = 8;
 446                         } else {
 447                                 mask = IN_CLASSC_NET;
 448                                 subnetshift = 4;
 449                         }
 450                         /*
 451                          * If there are more bits than the standard mask
 452                          * would suggest, subnets must be in use.
 453                          * Guess at the subnet mask, assuming reasonable
 454                          * width subnet fields.
 455                          */
 456                         while (in.s_addr &~ mask)
 457                                 mask = mask >> subnetshift;
 458                         net = in.s_addr & mask;
 459                         while ((mask & 1) == 0)
 460                                 mask >>= 1, net >>= 1;
 461                         np = getnetbyaddr(net, AF_INET);
 462                         if (np)
 463                                 cp = np->n_name;
 464                 }
 465                 if (cp)
 466                         strncpy(line, cp, sizeof(line));
 467                 else if ((in.s_addr & 0xffffff) == 0)
 468                         (void) snprintf(line, sizeof(line), "%u", C(in.s_addr >> 24));
 469                 else if ((in.s_addr & 0xffff) == 0)
 470                         (void) snprintf(line, sizeof(line), "%u.%u", C(in.s_addr >> 24),
 471                             C(in.s_addr >> 16));
 472                 else if ((in.s_addr & 0xff) == 0)
 473                         (void) snprintf(line, sizeof(line), "%u.%u.%u", C(in.s_addr >> 24),
 474                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 475                 else
 476                         (void) snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
 477                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 478                             C(in.s_addr));
 479                 break;
 480             }
 481
 482 #ifdef INET6
 483         case AF_INET6:
 484         {
 485                 struct sockaddr_in6 sin6; /* use static var for safety */
 486                 int niflags = 0;
 487 #ifdef NI_WITHSCOPEID
 488                 niflags = NI_WITHSCOPEID;
 489 #endif
 490
 491                 memset(&sin6, 0, sizeof(sin6));
 492                 memcpy(&sin6, sa, sa->sa_len);
 493                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 494                 sin6.sin6_family = AF_INET6;
 495 #ifdef __KAME__
 496                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 497                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 498                      IN6_IS_ADDR_MC_NODELOCAL(&sin6.sin6_addr) ||
 499                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 500                     sin6.sin6_scope_id == 0) {
 501                         sin6.sin6_scope_id =
 502                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 503                         sin6.sin6_addr.s6_addr[2] = 0;
 504                         sin6.sin6_addr.s6_addr[3] = 0;
 505                 }
 506 #endif
 507                 if (nflag)
 508                         niflags |= NI_NUMERICHOST;
 509                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 510                     line, sizeof(line), NULL, 0, niflags) != 0)
 511                         strncpy(line, "invalid", sizeof(line));
 512
 513                 return(line);
 514         }
 515 #endif
 516
 517         case AF_LINK:
 518                 return (link_ntoa((struct sockaddr_dl *)sa));
 519
 520
 521         default:
 522             {   u_short *s = (u_short *)sa->sa_data;
 523                 u_short *slim = s + ((sa->sa_len + 1)>>1);
 524                 char *cp = line + snprintf(line, sizeof(line), "af %d:", sa->sa_family);
 525                 char *cpe = line + sizeof(line);
 526
 527                 while (s < slim && cp < cpe)
 528                         cp += snprintf(cp, cpe - cp, " %x", *s++);
 529                 break;
 530             }
 531         }
 532         return (line);
 533 }
 534
 535 static const char *
 536 route_strerror(int error)
 537 {
 538
 539         switch (error) {
 540         case ESRCH:
 541                 return "not in table";
 542         case EBUSY:
 543                 return "entry in use";
 544         case ENOBUFS:
 545                 return "routing table overflow";
 546         default:
 547                 return (strerror(error));
 548         }
 549 }
 550
 551 void
 552 set_metric(value, key)
 553         char *value;
 554         int key;
 555 {
 556         int flag = 0;
 557         u_int noval, *valp = &noval;
 558
 559         switch (key) {
 560 #define caseof(x, y, z) case x: valp = (u_int *)&rt_metrics.z; flag = y; break
 561         caseof(K_MTU, RTV_MTU, rmx_mtu);
 562         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 563         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 564         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 565         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 566         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 567         caseof(K_RTT, RTV_RTT, rmx_rtt);
 568         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 569         }
 570         rtm_inits |= flag;
 571         if (lockrest || locking)
 572                 rt_metrics.rmx_locks |= flag;
 573         if (locking)
 574                 locking = 0;
 575         *valp = atoi(value);
 576 }
 577
 578 void
 579 newroute(argc, argv)
 580         int argc;
 581         register char **argv;
 582 {
 583         char *cmd, *dest = "", *gateway = "";
 584         int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 585         int key;
 586         struct hostent *hp = 0;
 587
 588         if (uid) {
 589                 errx(EX_NOPERM, "must be root to alter routing table");
 590         }
 591         cmd = argv[0];
 592         if (*cmd != 'g')
 593                 shutdown(s, 0); /* Don't want to read back our messages */
 594         while (--argc > 0) {
 595                 if (**(++argv)== '-') {
 596                         switch (key = keyword(1 + *argv)) {
 597                         case K_LINK:
 598                                 af = AF_LINK;
 599                                 aflen = sizeof(struct sockaddr_dl);
 600                                 break;
 601                         case K_INET:
 602                                 af = AF_INET;
 603                                 aflen = sizeof(struct sockaddr_in);
 604                                 break;
 605 #ifdef INET6
 606                         case K_INET6:
 607                                 af = AF_INET6;
 608                                 aflen = sizeof(struct sockaddr_in6);
 609                                 break;
 610 #endif
 611                         case K_SA:
 612                                 af = PF_ROUTE;
 613                                 aflen = sizeof(union sockunion);
 614                                 break;
 615                         case K_IFACE:
 616                         case K_INTERFACE:
 617                                 iflag++;
 618                                 break;
 619                         case K_NOSTATIC:
 620                                 flags &= ~RTF_STATIC;
 621                                 break;
 622                         case K_LLINFO:
 623                                 flags |= RTF_LLINFO;
 624                                 break;
 625                         case K_LOCK:
 626                                 locking = 1;
 627                                 break;
 628                         case K_LOCKREST:
 629                                 lockrest = 1;
 630                                 break;
 631                         case K_HOST:
 632                                 forcehost++;
 633                                 break;
 634                         case K_REJECT:
 635                                 flags |= RTF_REJECT;
 636                                 break;
 637                         case K_BLACKHOLE:
 638                                 flags |= RTF_BLACKHOLE;
 639                                 break;
 640                         case K_PROTO1:
 641                                 flags |= RTF_PROTO1;
 642                                 break;
 643                         case K_PROTO2:
 644                                 flags |= RTF_PROTO2;
 645                                 break;
 646                         case K_CLONING:
 647                                 flags |= RTF_CLONING;
 648                                 break;
 649                         case K_XRESOLVE:
 650                                 flags |= RTF_XRESOLVE;
 651                                 break;
 652                         case K_STATIC:
 653                                 flags |= RTF_STATIC;
 654                                 break;
 655                         case K_IFA:
 656                                 if (!--argc)
 657                                         usage((char *)NULL);
 658                                 (void) getaddr(RTA_IFA, *++argv, 0);
 659                                 break;
 660                         case K_IFP:
 661                                 if (!--argc)
 662                                         usage((char *)NULL);
 663                                 (void) getaddr(RTA_IFP, *++argv, 0);
 664                                 break;
 665                         case K_GENMASK:
 666                                 if (!--argc)
 667                                         usage((char *)NULL);
 668                                 (void) getaddr(RTA_GENMASK, *++argv, 0);
 669                                 break;
 670                         case K_GATEWAY:
 671                                 if (!--argc)
 672                                         usage((char *)NULL);
 673                                 (void) getaddr(RTA_GATEWAY, *++argv, 0);
 674                                 break;
 675                         case K_DST:
 676                                 if (!--argc)
 677                                         usage((char *)NULL);
 678                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 679                                 dest = *argv;
 680                                 break;
 681                         case K_NETMASK:
 682                                 if (!--argc)
 683                                         usage((char *)NULL);
 684                                 (void) getaddr(RTA_NETMASK, *++argv, 0);
 685                                 /* FALLTHROUGH */
 686                         case K_NET:
 687                                 forcenet++;
 688                                 break;
 689                         case K_PREFIXLEN:
 690                                 if (!--argc)
 691                                         usage((char *)NULL);
 692                                 if (prefixlen(*++argv) == -1) {
 693                                         forcenet = 0;
 694                                         ishost = 1;
 695                                 } else {
 696                                         forcenet = 1;
 697                                         ishost = 0;
 698                                 }
 699                                 break;
 700                         case K_MTU:
 701                         case K_HOPCOUNT:
 702                         case K_EXPIRE:
 703                         case K_RECVPIPE:
 704                         case K_SENDPIPE:
 705                         case K_SSTHRESH:
 706                         case K_RTT:
 707                         case K_RTTVAR:
 708                                 if (!--argc)
 709                                         usage((char *)NULL);
 710                                 set_metric(*++argv, key);
 711                                 break;
 712                         case K_IFSCOPE:
 713                                 if (!--argc)
 714                                         usage((char *)NULL);
 715                                 if ((ifscope = if_nametoindex(*++argv)) != 0)
 716                                         flags |= RTF_IFSCOPE;
 717                                 else
 718                                         errx(1, "bad interface name");
 719                                 break;
 720                         default:
 721                                 usage(1+*argv);
 722                         }
 723                 } else {
 724                         if ((rtm_addrs & RTA_DST) == 0) {
 725                                 dest = *argv;
 726                                 ishost = getaddr(RTA_DST, *argv, &hp);
 727                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 728                                 gateway = *argv;
 729                                 (void) getaddr(RTA_GATEWAY, *argv, &hp);
 730                         } else {
 731                                 (void) getaddr(RTA_NETMASK, *argv, 0);
 732                         }
 733                 }
 734         }
 735         if (forcehost) {
 736                 ishost = 1;
 737 #ifdef INET6
 738                 if (af == AF_INET6) {
 739                         rtm_addrs &= ~RTA_NETMASK;
 740                         memset((void *)&so_mask, 0, sizeof(so_mask));
 741                 }
 742 #endif
 743         }
 744         if (forcenet)
 745                 ishost = 0;
 746         flags |= RTF_UP;
 747         if (ishost)
 748                 flags |= RTF_HOST;
 749         if (iflag == 0)
 750                 flags |= RTF_GATEWAY;
 751         if (so_mask.sin.sin_family == AF_INET) {
 752                 // make sure the mask is contiguous
 753                 long i;
 754                 for (i = 0; i < 32; i++)
 755                         if (((so_mask.sin.sin_addr.s_addr) & ntohl((1 << i))) != 0)
 756                                 break;
 757                 for (; i < 32; i++)
 758                         if (((so_mask.sin.sin_addr.s_addr) & ntohl((1 << i))) == 0)
 759                                 errx(EX_NOHOST, "invalid mask: %s", inet_ntoa(so_mask.sin.sin_addr));
 760         }
 761         for (attempts = 1; ; attempts++) {
 762                 errno = 0;
 763                 if ((ret = rtmsg(*cmd, flags)) == 0)
 764                         break;
 765                 if (errno != ENETUNREACH && errno != ESRCH)
 766                         break;
 767                 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) {
 768                         hp->h_addr_list++;
 769                         bcopy(hp->h_addr_list[0], &so_gate.sin.sin_addr,
 770                             MIN(hp->h_length, sizeof(so_gate.sin.sin_addr)));
 771                 } else
 772                         break;
 773         }
 774         if (*cmd == 'g')
 775                 exit(0);
 776         oerrno = errno;
 777         (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 778         if (*gateway) {
 779                 (void) printf(": gateway %s", gateway);
 780                 if (attempts > 1 && ret == 0 && af == AF_INET)
 781                     (void) printf(" (%s)", inet_ntoa(so_gate.sin.sin_addr));
 782         }
 783         if (ret == 0)
 784                 (void) printf("\n");
 785         else {
 786                 (void)printf(": %s\n", route_strerror(oerrno));
 787         }
 788 }
 789
 790 void
 791 inet_makenetandmask(net, sin, bits)
 792         in_addr_t net, bits;
 793         register struct sockaddr_in *sin;
 794 {
 795         in_addr_t addr, mask = 0;
 796         register char *cp;
 797
 798         rtm_addrs |= RTA_NETMASK;
 799         if (bits) {
 800                 addr = net;
 801                 mask = 0xffffffff << (32 - bits);
 802         } else if (net == 0)
 803                 mask = addr = 0;
 804         else if (net < 128) {
 805                 addr = net << IN_CLASSA_NSHIFT;
 806                 mask = IN_CLASSA_NET;
 807         } else if (net < 65536) {
 808                 addr = net << IN_CLASSB_NSHIFT;
 809                 mask = IN_CLASSB_NET;
 810         } else if (net < 16777216L) {
 811                 addr = net << IN_CLASSC_NSHIFT;
 812                 mask = IN_CLASSC_NET;
 813         } else {
 814                 addr = net;
 815                 if ((addr & IN_CLASSA_HOST) == 0)
 816                         mask =  IN_CLASSA_NET;
 817                 else if ((addr & IN_CLASSB_HOST) == 0)
 818                         mask =  IN_CLASSB_NET;
 819                 else if ((addr & IN_CLASSC_HOST) == 0)
 820                         mask =  IN_CLASSC_NET;
 821                 else
 822                         mask = -1;
 823         }
 824         sin->sin_addr.s_addr = htonl(addr);
 825         sin = &so_mask.sin;
 826         sin->sin_addr.s_addr = htonl(mask);
 827         sin->sin_len = 0;
 828         sin->sin_family = 0;
 829         cp = (char *)(&sin->sin_addr + 1);
 830         while (*--cp == 0 && cp > (char *)sin)
 831                 ;
 832         sin->sin_len = 1 + cp - (char *)sin;
 833 }
 834
 835 #ifdef INET6
 836 /*
 837  * XXX the function may need more improvement...
 838  */
 839 static int
 840 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
 841 {
 842         struct in6_addr in6;
 843
 844         if (plen == NULL) {
 845                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 846                     sin6->sin6_scope_id == 0) {
 847                         plen = "0";
 848                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 849                         /* aggregatable global unicast - RFC2374 */
 850                         memset(&in6, 0, sizeof(in6));
 851                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
 852                                     &in6.s6_addr[8], 8))
 853                                 plen = "64";
 854                 }
 855         }
 856
 857         if (plen == NULL || strcmp(plen, "128") == 0)
 858                 return (1);
 859         rtm_addrs |= RTA_NETMASK;
 860         prefixlen(plen);
 861         return (0);
 862 }
 863 #endif
 864
 865 /*
 866  * Interpret an argument as a network address of some kind,
 867  * returning 1 if a host address, 0 if a network address.
 868  */
 869 int
 870 getaddr(which, s, hpp)
 871         int which;
 872         char *s;
 873         struct hostent **hpp;
 874 {
 875         register sup su = NULL;
 876         struct hostent *hp;
 877         struct netent *np;
 878         in_addr_t val;
 879         char *q;
 880         int afamily;  /* local copy of af so we can change it */
 881
 882         if (af == 0) {
 883                 af = AF_INET;
 884                 aflen = sizeof(struct sockaddr_in);
 885         }
 886         afamily = af;
 887         rtm_addrs |= which;
 888         switch (which) {
 889         case RTA_DST:
 890                 su = &so_dst;
 891                 break;
 892         case RTA_GATEWAY:
 893                 su = &so_gate;
 894                 if (iflag) {
 895                         struct ifaddrs *ifap, *ifa;
 896                         struct sockaddr_dl *sdl = NULL;
 897
 898                         if (getifaddrs(&ifap))
 899                                 err(1, "getifaddrs");
 900
 901                         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 902                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 903                                         continue;
 904
 905                                 if (strcmp(s, ifa->ifa_name))
 906                                         continue;
 907
 908                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 909                         }
 910                         /* If we found it, then use it */
 911                         if (sdl) {
 912                                 /*
 913                                  * Copy is safe since we have a
 914                                  * sockaddr_storage member in sockunion{}.
 915                                  * Note that we need to copy before calling
 916                                  * freeifaddrs().
 917                                  */
 918                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 919                         }
 920                         freeifaddrs(ifap);
 921                         if (sdl)
 922                                 return(1);
 923                 }
 924                 break;
 925         case RTA_NETMASK:
 926                 su = &so_mask;
 927                 break;
 928         case RTA_GENMASK:
 929                 su = &so_genmask;
 930                 break;
 931         case RTA_IFP:
 932                 su = &so_ifp;
 933                 afamily = AF_LINK;
 934                 break;
 935         case RTA_IFA:
 936                 su = &so_ifa;
 937                 break;
 938         default:
 939                 usage("internal error");
 940                 /*NOTREACHED*/
 941         }
 942         su->sa.sa_len = aflen;
 943         su->sa.sa_family = afamily; /* cases that don't want it have left already */
 944         if (strcmp(s, "default") == 0) {
 945                 /*
 946                  * Default is net 0.0.0.0/0
 947                  */
 948                 switch (which) {
 949                 case RTA_DST:
 950                         forcenet++;
 951                         /* bzero(su, sizeof(*su)); *//* for readability */
 952                         (void) getaddr(RTA_NETMASK, s, 0);
 953                         break;
 954                 case RTA_NETMASK:
 955                 case RTA_GENMASK:
 956                         /* bzero(su, sizeof(*su)); *//* for readability */
 957                         su->sa.sa_len = 0;
 958                         break;
 959                 }
 960                 return (0);
 961         }
 962         switch (afamily) {
 963 #ifdef INET6
 964         case AF_INET6:
 965         {
 966                 struct addrinfo hints, *res;
 967                 int ecode;
 968
 969                 q = NULL;
 970                 if (which == RTA_DST && (q = strchr(s, '/')) != NULL)
 971                         *q = '\0';
 972                 memset(&hints, 0, sizeof(hints));
 973                 hints.ai_family = afamily;      /*AF_INET6*/
 974                 hints.ai_flags = AI_NUMERICHOST;
 975                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
 976                 ecode = getaddrinfo(s, NULL, &hints, &res);
 977                 if (ecode != 0 || res->ai_family != AF_INET6 ||
 978                     res->ai_addrlen != sizeof(su->sin6)) {
 979                         (void) fprintf(stderr, "%s: %s\n", s,
 980                             gai_strerror(ecode));
 981                         exit(1);
 982                 }
 983                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
 984 #ifdef __KAME__
 985                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
 986                      IN6_IS_ADDR_MC_NODELOCAL(&su->sin6.sin6_addr) ||
 987                      IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) &&
 988                     su->sin6.sin6_scope_id) {
 989                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
 990                                 htons(su->sin6.sin6_scope_id);
 991                         su->sin6.sin6_scope_id = 0;
 992                 }
 993 #endif
 994                 freeaddrinfo(res);
 995                 if (hints.ai_flags == AI_NUMERICHOST) {
 996                         if (q != NULL)
 997                                 *q++ = '/';
 998                         if (which == RTA_DST)
 999                                 return (inet6_makenetandmask(&su->sin6, q));
1000                         return (0);
1001                 } else {
1002                         return (1);
1003                 }
1004         }
1005 #endif /* INET6 */
1006
1007         case AF_LINK:
1008                 link_addr(s, &su->sdl);
1009                 return (1);
1010
1011
1012         case PF_ROUTE:
1013                 su->sa.sa_len = sizeof(*su);
1014                 sockaddr(s, &su->sa);
1015                 return (1);
1016
1017         case AF_INET:
1018         default:
1019                 break;
1020         }
1021
1022         if (hpp == NULL)
1023                 hpp = &hp;
1024         *hpp = NULL;
1025
1026         q = strchr(s,'/');
1027         if (q && which == RTA_DST) {
1028                 *q = '\0';
1029                 if ((val = inet_addr(s)) != INADDR_NONE) {
1030                         inet_makenetandmask(
1031                                 ntohl(val), &su->sin, strtoul(q+1, 0, 0));
1032                         return (0);
1033                 }
1034                 *q = '/';
1035         }
1036         if ((which != RTA_DST || forcenet == 0) &&
1037             (val = inet_addr(s)) != INADDR_NONE) {
1038                 su->sin.sin_addr.s_addr = val;
1039                 if (which != RTA_DST ||
1040                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1041                         return (1);
1042                 else {
1043                         val = ntohl(val);
1044                         goto netdone;
1045                 }
1046         }
1047         if (which == RTA_DST && forcehost == 0 &&
1048             ((val = inet_network(s)) != INADDR_NONE ||
1049             ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0))) {
1050 netdone:
1051                 inet_makenetandmask(val, &su->sin, 0);
1052                 return (0);
1053         }
1054         hp = gethostbyname(s);
1055         if (hp) {
1056                 *hpp = hp;
1057                 su->sin.sin_family = hp->h_addrtype;
1058                 bcopy(hp->h_addr, (char *)&su->sin.sin_addr,
1059                     MIN(hp->h_length, sizeof(su->sin.sin_addr)));
1060                 return (1);
1061         }
1062         errx(EX_NOHOST, "bad address: %s", s);
1063 }
1064
1065 int
1066 prefixlen(s)
1067         char *s;
1068 {
1069         int len = atoi(s), q, r;
1070         int max;
1071         char *p;
1072
1073         rtm_addrs |= RTA_NETMASK;
1074         switch (af) {
1075 #ifdef INET6
1076         case AF_INET6:
1077                 max = 128;
1078                 p = (char *)&so_mask.sin6.sin6_addr;
1079                 break;
1080 #endif
1081         case AF_INET:
1082                 max = 32;
1083                 p = (char *)&so_mask.sin.sin_addr;
1084                 break;
1085         default:
1086                 (void) fprintf(stderr, "prefixlen not supported in this af\n");
1087                 exit(1);
1088                 /*NOTREACHED*/
1089         }
1090
1091         if (len < 0 || max < len) {
1092                 (void) fprintf(stderr, "%s: bad value\n", s);
1093                 exit(1);
1094         }
1095
1096         q = len >> 3;
1097         r = len & 7;
1098         so_mask.sa.sa_family = af;
1099         so_mask.sa.sa_len = aflen;
1100         memset((void *)p, 0, max / 8);
1101         if (q > 0)
1102                 memset((void *)p, 0xff, q);
1103         if (r > 0)
1104                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1105         if (len == max)
1106                 return -1;
1107         else
1108                 return len;
1109 }
1110
1111 void
1112 interfaces()
1113 {
1114         size_t needed;
1115         int mib[6];
1116         char *buf, *lim, *next;
1117         register struct rt_msghdr *rtm;
1118
1119         mib[0] = CTL_NET;
1120         mib[1] = PF_ROUTE;
1121         mib[2] = 0;             /* protocol */
1122         mib[3] = 0;             /* wildcard address family */
1123         mib[4] = NET_RT_IFLIST;
1124         mib[5] = 0;             /* no flags */
1125         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1126                 err(EX_OSERR, "route-sysctl-estimate");
1127         if ((buf = malloc(needed)) == NULL)
1128                 errx(EX_OSERR, "malloc failed");
1129         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1130                 err(EX_OSERR, "actual retrieval of interface table");
1131         lim = buf + needed;
1132         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1133                 rtm = (struct rt_msghdr *)next;
1134                 print_rtmsg(rtm, rtm->rtm_msglen);
1135         }
1136 }
1137
1138 void
1139 monitor()
1140 {
1141         int n;
1142         char msg[2048];
1143
1144         verbose = 1;
1145         if (debugonly) {
1146                 interfaces();
1147                 exit(0);
1148         }
1149         for(;;) {
1150                 time_t now;
1151                 n = read(s, msg, 2048);
1152                 now = time(NULL);
1153                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1154                 print_rtmsg((struct rt_msghdr *)msg, n);
1155         }
1156 }
1157
1158 struct {
1159         struct  rt_msghdr m_rtm;
1160         char    m_space[512];
1161 } m_rtmsg;
1162
1163 int
1164 rtmsg(cmd, flags)
1165         int cmd, flags;
1166 {
1167         static int seq;
1168         int rlen;
1169         register char *cp = m_rtmsg.m_space;
1170         register int l;
1171
1172 #define NEXTADDR(w, u) \
1173         if (rtm_addrs & (w)) {\
1174             l = ROUNDUP(u.sa.sa_len); bcopy((char *)&(u), cp, l); cp += l;\
1175             if (verbose) sodump(&(u),"u");\
1176         }
1177
1178         errno = 0;
1179         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
1180         if (cmd == 'a')
1181                 cmd = RTM_ADD;
1182         else if (cmd == 'c')
1183                 cmd = RTM_CHANGE;
1184         else if (cmd == 'g') {
1185                 cmd = RTM_GET;
1186                 if (so_ifp.sa.sa_family == 0) {
1187                         so_ifp.sa.sa_family = AF_LINK;
1188                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1189                         rtm_addrs |= RTA_IFP;
1190                 }
1191         } else
1192                 cmd = RTM_DELETE;
1193 #define rtm m_rtmsg.m_rtm
1194         rtm.rtm_type = cmd;
1195         rtm.rtm_flags = flags;
1196         rtm.rtm_version = RTM_VERSION;
1197         rtm.rtm_seq = ++seq;
1198         rtm.rtm_addrs = rtm_addrs;
1199         rtm.rtm_rmx = rt_metrics;
1200         rtm.rtm_inits = rtm_inits;
1201         rtm.rtm_index = ifscope;
1202
1203         if (rtm_addrs & RTA_NETMASK)
1204                 mask_addr();
1205         NEXTADDR(RTA_DST, so_dst);
1206         NEXTADDR(RTA_GATEWAY, so_gate);
1207         NEXTADDR(RTA_NETMASK, so_mask);
1208         NEXTADDR(RTA_GENMASK, so_genmask);
1209         NEXTADDR(RTA_IFP, so_ifp);
1210         NEXTADDR(RTA_IFA, so_ifa);
1211         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1212         if (verbose)
1213                 print_rtmsg(&rtm, l);
1214         if (debugonly)
1215                 return (0);
1216         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1217                 warnx("writing to routing socket: %s", route_strerror(errno));
1218                 return (-1);
1219         }
1220         if (cmd == RTM_GET) {
1221                 do {
1222                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1223                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1224                 if (l < 0)
1225                         warn("read from routing socket");
1226                 else
1227                         print_getmsg(&rtm, l);
1228         }
1229 #undef rtm
1230         return (0);
1231 }
1232
1233 void
1234 mask_addr()
1235 {
1236         int olen = so_mask.sa.sa_len;
1237         register char *cp1 = olen + (char *)&so_mask, *cp2;
1238
1239         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1240                 if (*--cp1 != 0) {
1241                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1242                         break;
1243                 }
1244         if ((rtm_addrs & RTA_DST) == 0)
1245                 return;
1246         switch (so_dst.sa.sa_family) {
1247         case AF_INET:
1248 #ifdef INET6
1249         case AF_INET6:
1250 #endif
1251         case AF_APPLETALK:
1252         case 0:
1253                 return;
1254         }
1255         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1256         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1257         while (cp2 > cp1)
1258                 *--cp2 = 0;
1259         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1260         while (cp1 > so_dst.sa.sa_data)
1261                 *--cp1 &= *--cp2;
1262 }
1263
1264 char *msgtypes[] = {
1265         "",
1266         "RTM_ADD: Add Route",
1267         "RTM_DELETE: Delete Route",
1268         "RTM_CHANGE: Change Metrics or flags",
1269         "RTM_GET: Report Metrics",
1270         "RTM_LOSING: Kernel Suspects Partitioning",
1271         "RTM_REDIRECT: Told to use different route",
1272         "RTM_MISS: Lookup failed on this address",
1273         "RTM_LOCK: fix specified metrics",
1274         "RTM_OLDADD: caused by SIOCADDRT",
1275         "RTM_OLDDEL: caused by SIOCDELRT",
1276         "RTM_RESOLVE: Route created by cloning",
1277         "RTM_NEWADDR: address being added to iface",
1278         "RTM_DELADDR: address being removed from iface",
1279         "RTM_IFINFO: iface status change",
1280         "RTM_NEWMADDR: new multicast group membership on iface",
1281         "RTM_DELMADDR: multicast group membership removed from iface",
1282         0,
1283 };
1284
1285 char metricnames[] =
1286 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1287 "\1mtu";
1288 char routeflags[] =
1289 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010DELCLONE"
1290 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1291 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024b024"
1292 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\031IFSCOPE\032CONDEMNED"
1293 "\033IFREF\034PROXY\035ROUTER";
1294 char ifnetflags[] =
1295 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1296 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1297 "\017LINK2\020MULTICAST";
1298 char addrnames[] =
1299 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1300
1301 void
1302 print_rtmsg(rtm, msglen)
1303         register struct rt_msghdr *rtm;
1304         int msglen;
1305 {
1306         struct if_msghdr *ifm;
1307         struct ifa_msghdr *ifam;
1308 #ifdef RTM_NEWMADDR
1309         struct ifma_msghdr *ifmam;
1310 #endif
1311
1312         if (verbose == 0)
1313                 return;
1314         if (rtm->rtm_version != RTM_VERSION) {
1315                 (void) printf("routing message version %d not understood\n",
1316                     rtm->rtm_version);
1317                 return;
1318         }
1319         (void)printf("%s: len %d, ", msgtypes[rtm->rtm_type], rtm->rtm_msglen);
1320         switch (rtm->rtm_type) {
1321         case RTM_IFINFO:
1322                 ifm = (struct if_msghdr *)rtm;
1323                 (void) printf("if# %d, flags:", ifm->ifm_index);
1324                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1325                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1326                 break;
1327         case RTM_NEWADDR:
1328         case RTM_DELADDR:
1329                 ifam = (struct ifa_msghdr *)rtm;
1330                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1331                 bprintf(stdout, ifam->ifam_flags, routeflags);
1332                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1333                 break;
1334 #ifdef RTM_NEWMADDR
1335         case RTM_NEWMADDR:
1336         case RTM_DELMADDR:
1337                 ifmam = (struct ifma_msghdr *)rtm;
1338                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1339                 break;
1340 #endif
1341         default:
1342                 (void) printf("pid: %ld, seq %d, errno %d, ",
1343                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1344                 if (rtm->rtm_flags & RTF_IFSCOPE)
1345                         (void) printf("ifscope %d, ", rtm->rtm_index);
1346                         if (rtm->rtm_flags & RTF_IFREF)
1347                         (void) printf("ifref, ");
1348                         (void) printf("flags:");
1349                 bprintf(stdout, rtm->rtm_flags, routeflags);
1350                 pmsg_common(rtm);
1351         }
1352 }
1353
1354 void
1355 print_getmsg(rtm, msglen)
1356         register struct rt_msghdr *rtm;
1357         int msglen;
1358 {
1359         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1360         struct sockaddr_dl *ifp = NULL;
1361         register struct sockaddr *sa;
1362         register char *cp;
1363         register int i;
1364
1365         (void) printf("   route to: %s\n", routename(&so_dst.sa));
1366         if (rtm->rtm_version != RTM_VERSION) {
1367                 warnx("routing message version %d not understood",
1368                      rtm->rtm_version);
1369                 return;
1370         }
1371         if (rtm->rtm_msglen > msglen) {
1372                 warnx("message length mismatch, in packet %d, returned %d",
1373                       rtm->rtm_msglen, msglen);
1374         }
1375         if (rtm->rtm_errno)  {
1376                 errno = rtm->rtm_errno;
1377                 warn("message indicates error %d", errno);
1378                 return;
1379         }
1380         cp = ((char *)(rtm + 1));
1381         if (rtm->rtm_addrs)
1382                 for (i = 1; i; i <<= 1)
1383                         if (i & rtm->rtm_addrs) {
1384                                 sa = (struct sockaddr *)cp;
1385                                 switch (i) {
1386                                 case RTA_DST:
1387                                         dst = sa;
1388                                         break;
1389                                 case RTA_GATEWAY:
1390                                         gate = sa;
1391                                         break;
1392                                 case RTA_NETMASK:
1393                                         mask = sa;
1394                                         break;
1395                                 case RTA_IFP:
1396                                         if (sa->sa_family == AF_LINK &&
1397                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1398                                                 ifp = (struct sockaddr_dl *)sa;
1399                                         break;
1400                                 }
1401                                 ADVANCE(cp, sa);
1402                         }
1403         if (dst && mask)
1404                 mask->sa_family = dst->sa_family;       /* XXX */
1405         if (dst)
1406                 (void)printf("destination: %s\n", routename(dst));
1407         if (mask) {
1408                 int savenflag = nflag;
1409
1410                 nflag = 1;
1411                 (void)printf("       mask: %s\n", routename(mask));
1412                 nflag = savenflag;
1413         }
1414         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1415                 (void)printf("    gateway: %s\n", routename(gate));
1416         if (ifp)
1417                 (void)printf("  interface: %.*s\n",
1418                     ifp->sdl_nlen, ifp->sdl_data);
1419         (void)printf("      flags: ");
1420         bprintf(stdout, rtm->rtm_flags, routeflags);
1421
1422 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1423 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1424
1425         (void) printf("\n%s\n", "\
1426  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
1427         printf("%8u%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1428         printf("%8u%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1429         printf("%8u%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1430         printf("%8u%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1431         printf("%8u%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1432         printf("%8u%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1433         printf("%8u%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1434         if (rtm->rtm_rmx.rmx_expire)
1435                 rtm->rtm_rmx.rmx_expire -= time(0);
1436         printf("%8d%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1437 #undef lock
1438 #undef msec
1439 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1440         if (verbose)
1441                 pmsg_common(rtm);
1442         else if (rtm->rtm_addrs &~ RTA_IGN) {
1443                 (void) printf("sockaddrs: ");
1444                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1445                 putchar('\n');
1446         }
1447 #undef  RTA_IGN
1448 }
1449
1450 void
1451 pmsg_common(rtm)
1452         register struct rt_msghdr *rtm;
1453 {
1454         (void) printf("\nlocks: ");
1455         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1456         (void) printf(" inits: ");
1457         bprintf(stdout, rtm->rtm_inits, metricnames);
1458         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1459 }
1460
1461 void
1462 pmsg_addrs(cp, addrs)
1463         char    *cp;
1464         int     addrs;
1465 {
1466         register struct sockaddr *sa;
1467         int i;
1468
1469         if (addrs == 0) {
1470                 (void) putchar('\n');
1471                 return;
1472         }
1473         (void) printf("\nsockaddrs: ");
1474         bprintf(stdout, addrs, addrnames);
1475         (void) putchar('\n');
1476         for (i = 1; i; i <<= 1)
1477                 if (i & addrs) {
1478                         sa = (struct sockaddr *)cp;
1479                         (void) printf(" %s", routename(sa));
1480                         ADVANCE(cp, sa);
1481                 }
1482         (void) putchar('\n');
1483         (void) fflush(stdout);
1484 }
1485
1486 void
1487 bprintf(fp, b, s)
1488         register FILE *fp;
1489         register int b;
1490         register u_char *s;
1491 {
1492         register int i;
1493         int gotsome = 0;
1494
1495         if (b == 0)
1496                 return;
1497         while ((i = *s++) != 0) {
1498                 if (b & (1 << (i-1))) {
1499                         if (gotsome == 0)
1500                                 i = '<';
1501                         else
1502                                 i = ',';
1503                         (void) putc(i, fp);
1504                         gotsome = 1;
1505                         for (; (i = *s) > 32; s++)
1506                                 (void) putc(i, fp);
1507                 } else
1508                         while (*s > 32)
1509                                 s++;
1510         }
1511         if (gotsome)
1512                 (void) putc('>', fp);
1513 }
1514
1515 int
1516 keyword(cp)
1517         char *cp;
1518 {
1519         register struct keytab *kt = keywords;
1520
1521         while (kt->kt_cp && strcmp(kt->kt_cp, cp))
1522                 kt++;
1523         return kt->kt_i;
1524 }
1525
1526 void
1527 sodump(su, which)
1528         register sup su;
1529         char *which;
1530 {
1531         switch (su->sa.sa_family) {
1532         case AF_LINK:
1533                 (void) printf("%s: link %s; ",
1534                     which, link_ntoa(&su->sdl));
1535                 break;
1536         case AF_INET:
1537                 (void) printf("%s: inet %s; ",
1538                     which, inet_ntoa(su->sin.sin_addr));
1539                 break;
1540         }
1541         (void) fflush(stdout);
1542 }
1543
1544 /* States*/
1545 #define VIRGIN  0
1546 #define GOTONE  1
1547 #define GOTTWO  2
1548 /* Inputs */
1549 #define DIGIT   (4*0)
1550 #define END     (4*1)
1551 #define DELIM   (4*2)
1552
1553 void
1554 sockaddr(addr, sa)
1555         register char *addr;
1556         register struct sockaddr *sa;
1557 {
1558         register char *cp = (char *)sa;
1559         int size = sa->sa_len;
1560         char *cplim = cp + size;
1561         register int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1562
1563         bzero(cp, size);
1564         cp++;
1565         do {
1566                 if ((*addr >= '0') && (*addr <= '9')) {
1567                         new = *addr - '0';
1568                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1569                         new = *addr - 'a' + 10;
1570                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1571                         new = *addr - 'A' + 10;
1572                 } else if (*addr == 0)
1573                         state |= END;
1574                 else
1575                         state |= DELIM;
1576                 addr++;
1577                 switch (state /* | INPUT */) {
1578                 case GOTTWO | DIGIT:
1579                         *cp++ = byte; /*FALLTHROUGH*/
1580                 case VIRGIN | DIGIT:
1581                         state = GOTONE; byte = new; continue;
1582                 case GOTONE | DIGIT:
1583                         state = GOTTWO; byte = new + (byte << 4); continue;
1584                 default: /* | DELIM */
1585                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1586                 case GOTONE | END:
1587                 case GOTTWO | END:
1588                         *cp++ = byte; /* FALLTHROUGH */
1589                 case VIRGIN | END:
1590                         break;
1591                 }
1592                 break;
1593         } while (cp < cplim);
1594         sa->sa_len = cp - (char *)sa;
1595 }