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  */
  37
  38 #include <sys/param.h>
  39 #include <sys/file.h>
  40 #include <sys/socket.h>
  41 #include <sys/ioctl.h>
  42 #include <sys/sysctl.h>
  43 #include <sys/types.h>
  44
  45 #include <net/if.h>
  46 #include <net/route.h>
  47 #include <net/if_dl.h>
  48 #include <netinet/in.h>
  49 #include <netinet/if_ether.h>
  50 #include <arpa/inet.h>
  51 #include <netdb.h>
  52
  53 #include <netproto/mpls/mpls.h>
  54
  55 #include <ctype.h>
  56 #include <err.h>
  57 #include <errno.h>
  58 #include <paths.h>
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62 #include <sysexits.h>
  63 #include <unistd.h>
  64 #include <ifaddrs.h>
  65
  66 #include "extern.h"
  67 #include "keywords.h"
  68
  69 union   sockunion {
  70         struct  sockaddr sa;
  71         struct  sockaddr_in sin;
  72 #ifdef INET6
  73         struct  sockaddr_in6 sin6;
  74 #endif
  75         struct  sockaddr_mpls smpls;
  76         struct  sockaddr_dl sdl;
  77         struct  sockaddr_inarp sinarp;
  78         struct  sockaddr_storage ss; /* added to avoid memory overrun */
  79 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp, so_mpls1,
  80         so_mpls2, so_mpls3;
  81
  82 typedef union sockunion *sup;
  83
  84 int     nflag, wflag;
  85 int     cpuflag = -1;
  86
  87 static struct ortentry route;
  88 static struct rt_metrics rt_metrics;
  89 static int      pid, rtm_addrs;
  90 static int      s;
  91 static int      forcehost, forcenet, af, qflag, tflag;
  92 static int      iflag, verbose, aflen = sizeof(struct sockaddr_in);
  93 static int      locking, lockrest, debugonly;
  94 static int      mplsop, popcount, pushcount, swapcount;
  95 static u_long   rtm_inits;
  96 static uid_t    uid;
  97
  98 static void      flushroutes(int, char **);
  99 static void      set_metric(char *, int);
 100 static void      newroute(int, char **);
 101 static void      inet_makenetandmask(u_long, struct sockaddr_in *, u_long);
 102 static void      interfaces(void);
 103 static void      monitor(void);
 104 static void      sockaddr(const char *, struct sockaddr *);
 105 static void      sodump(sup, const char *);
 106 static void      bprintf(FILE *, int, u_char *);
 107 static void      print_getmsg(struct rt_msghdr *, int);
 108 static void      print_rtmsg(struct rt_msghdr *, int);
 109 static void      pmsg_common(struct rt_msghdr *);
 110 static void      pmsg_addrs(char *, int);
 111 static void      mask_addr(void);
 112 static int       getaddr(int, const char *, struct hostent **);
 113 static int       rtmsg(int, int);
 114 static int       prefixlen(const char *);
 115 #ifdef INET6
 116 static int       inet6_makenetandmask(struct sockaddr_in6 *, const char *);
 117 #endif
 118
 119 void
 120 usage(const char *cp)
 121 {
 122         if (cp != NULL)
 123                 warnx("bad keyword: %s", cp);
 124         fprintf(stderr, "usage: route [-dnqtv] command [[modifiers] args]\n");
 125         exit(EX_USAGE);
 126         /* NOTREACHED */
 127 }
 128
 129 #define ROUNDUP(a) \
 130         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
 131 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
 132
 133 int
 134 main(int argc, char **argv)
 135 {
 136         int ch;
 137
 138         if (argc < 2)
 139                 usage(NULL);
 140
 141         while ((ch = getopt(argc, argv, "c:wnqdtv")) != -1)
 142                 switch(ch) {
 143                 case 'c':
 144                         cpuflag = strtol(optarg, NULL, 0);
 145                         break;
 146                 case 'w':
 147                         wflag = 1;
 148                         break;
 149                 case 'n':
 150                         nflag = 1;
 151                         break;
 152                 case 'q':
 153                         qflag = 1;
 154                         break;
 155                 case 'v':
 156                         verbose = 1;
 157                         break;
 158                 case 't':
 159                         tflag = 1;
 160                         break;
 161                 case 'd':
 162                         debugonly = 1;
 163                         break;
 164                 case '?':
 165                 default:
 166                         usage(NULL);
 167                 }
 168         argc -= optind;
 169         argv += optind;
 170
 171         pid = getpid();
 172         uid = geteuid();
 173         if (tflag)
 174                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 175         else
 176                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 177         if (s < 0)
 178                 err(EX_OSERR, "socket");
 179         if (*argv != NULL)
 180                 switch (keyword(*argv)) {
 181                 case K_GET:
 182                         uid = 0;
 183                         /* FALLTHROUGH */
 184
 185                 case K_CHANGE:
 186                 case K_ADD:
 187                 case K_DELETE:
 188                         newroute(argc, argv);
 189                         /* NOTREACHED */
 190
 191                 case K_SHOW:
 192                         show(argc, argv);
 193                         return(0);
 194
 195                 case K_MONITOR:
 196                         monitor();
 197                         /* NOTREACHED */
 198
 199                 case K_FLUSH:
 200                         flushroutes(argc, argv);
 201                         exit(0);
 202                         /* NOTREACHED */
 203                 }
 204         usage(*argv);
 205         /* NOTREACHED */
 206 }
 207
 208 /*
 209  * Purge all entries in the routing tables not
 210  * associated with network interfaces.
 211  */
 212 static void
 213 flushroutes(int argc, char **argv)
 214 {
 215         size_t needed;
 216         int mib[7], rlen, seqno;
 217         int miblen;
 218         char *buf, *next, *lim;
 219         struct rt_msghdr *rtm;
 220
 221         if (uid != 0) {
 222                 errx(EX_NOPERM, "must be root to alter routing table");
 223         }
 224         shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 225         if (argc > 1) {
 226                 argv++;
 227                 if (argc == 2 && **argv == '-')
 228                     switch (keyword(*argv + 1)) {
 229                         case K_INET:
 230                                 af = AF_INET;
 231                                 break;
 232 #ifdef INET6
 233                         case K_INET6:
 234                                 af = AF_INET6;
 235                                 break;
 236 #endif
 237                         case K_LINK:
 238                                 af = AF_LINK;
 239                                 break;
 240                         case K_MPLS:
 241                                 af = AF_MPLS;
 242                                 break;
 243                         default:
 244                                 goto bad;
 245                 } else
 246 bad:                    usage(*argv);
 247         }
 248         mib[0] = CTL_NET;
 249         mib[1] = PF_ROUTE;
 250         mib[2] = 0;             /* protocol */
 251         mib[3] = 0;             /* wildcard address family */
 252         mib[4] = NET_RT_DUMP;
 253         mib[5] = 0;             /* no flags */
 254         if (cpuflag >= 0) {
 255                 mib[6] = cpuflag;
 256                 miblen = 7;
 257         } else {
 258                 miblen = 6;
 259         }
 260         if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0)
 261                 err(EX_OSERR, "route-sysctl-estimate");
 262         if ((buf = malloc(needed)) == NULL)
 263                 errx(EX_OSERR, "malloc failed");
 264         if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0)
 265                 err(EX_OSERR, "route-sysctl-get");
 266         lim = buf + needed;
 267         if (verbose)
 268                 printf("Examining routing table from sysctl\n");
 269         seqno = 0;              /* ??? */
 270         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 271                 rtm = (struct rt_msghdr *)next;
 272                 if (verbose)
 273                         print_rtmsg(rtm, rtm->rtm_msglen);
 274                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 275                         continue;
 276                 if (af != 0) {
 277                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 278
 279                         if (sa->sa_family != af)
 280                                 continue;
 281                 }
 282                 if (debugonly)
 283                         continue;
 284                 rtm->rtm_type = RTM_DELETE;
 285                 rtm->rtm_seq = seqno;
 286                 rlen = write(s, next, rtm->rtm_msglen);
 287                 if (rlen < (int)rtm->rtm_msglen) {
 288                         warn("write to routing socket");
 289                         printf("got only %d for rlen\n", rlen);
 290                         break;
 291                 }
 292                 seqno++;
 293                 if (qflag)
 294                         continue;
 295                 if (verbose) {
 296                         print_rtmsg(rtm, rlen);
 297                 } else {
 298                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 299                         if (wflag) {
 300                             printf("%-20s ", rtm->rtm_flags & RTF_HOST ?
 301                                 routename(sa) : netname(sa));
 302                         } else {
 303                             printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 304                                 routename(sa) : netname(sa));
 305                         }
 306                         sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) +
 307                             (char *)sa);
 308                         if (wflag) {
 309                             printf("%-20s ", routename(sa));
 310                         } else {
 311                             printf("%-20.20s ", routename(sa));
 312                         }
 313                         printf("done\n");
 314                 }
 315         }
 316 }
 317
 318 char *
 319 routename(struct sockaddr *sa)
 320 {
 321         const char *cp;
 322         static char line[MAXHOSTNAMELEN + 1];
 323         struct hostent *hp;
 324         static char domain[MAXHOSTNAMELEN + 1];
 325         static int first = 1;
 326
 327         if (first) {
 328                 first = 0;
 329                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 330                     (cp = strchr(domain, '.'))) {
 331                         domain[MAXHOSTNAMELEN] = '\0';
 332                         strcpy(domain, cp + 1);
 333                 } else
 334                         domain[0] = 0;
 335         }
 336
 337         if (sa->sa_len == 0)
 338                 strcpy(line, "default");
 339         else switch (sa->sa_family) {
 340
 341         case AF_INET:
 342             {   struct in_addr in;
 343                 in = ((struct sockaddr_in *)sa)->sin_addr;
 344
 345                 cp = NULL;
 346                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 347                         cp = "default";
 348                 if (cp == NULL && !nflag) {
 349                         hp = gethostbyaddr(&in, sizeof(struct in_addr),
 350                                 AF_INET);
 351                         if (hp != NULL) {
 352                                 char *cptr;
 353                                 cptr = strchr(hp->h_name, '.');
 354                                 if (cptr != NULL && !wflag &&
 355                                     strcmp(cptr + 1, domain) == 0)
 356                                         *cptr = '\0';
 357                                 cp = hp->h_name;
 358                         }
 359                 }
 360                 if (cp != NULL) {
 361                         strncpy(line, cp, sizeof(line) - 1);
 362                         line[sizeof(line) - 1] = '\0';
 363                 } else
 364                         sprintf(line, "%s", inet_ntoa(in));
 365                 break;
 366             }
 367
 368 #ifdef INET6
 369         case AF_INET6:
 370         {
 371                 struct sockaddr_in6 sin6; /* use static var for safety */
 372                 int niflags = 0;
 373 #ifdef NI_WITHSCOPEID
 374                 niflags = NI_WITHSCOPEID;
 375 #endif
 376
 377                 memset(&sin6, 0, sizeof(sin6));
 378                 memcpy(&sin6, sa, sa->sa_len);
 379                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 380                 sin6.sin6_family = AF_INET6;
 381 #ifdef __KAME__
 382                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 383                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 384                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 385                     sin6.sin6_scope_id == 0) {
 386                         sin6.sin6_scope_id =
 387                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 388                         sin6.sin6_addr.s6_addr[2] = 0;
 389                         sin6.sin6_addr.s6_addr[3] = 0;
 390                 }
 391 #endif
 392                 if (nflag)
 393                         niflags |= NI_NUMERICHOST;
 394                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 395                     line, sizeof(line), NULL, 0, niflags) != 0)
 396                         strncpy(line, "invalid", sizeof(line));
 397
 398                 return(line);
 399         }
 400 #endif
 401
 402         case AF_LINK:
 403                 return(link_ntoa((struct sockaddr_dl *)sa));
 404
 405         default:
 406             {
 407                 /*
 408                  * Unknown address family; just render the raw
 409                  * data in sa->sa_data as hex values.
 410                  */
 411                 uint8_t *sp = (uint8_t *)sa->sa_data;
 412                 uint8_t *splim = (uint8_t *)sa + sa->sa_len;
 413                 char *cps = line + sprintf(line, "(%d)", sa->sa_family);
 414                 char *cpe = line + sizeof(line);
 415
 416                 while (sp < splim && cps < cpe)
 417                         cps += snprintf(cps, cpe - cps, " %02x", *sp++);
 418                 break;
 419             }
 420         }
 421         return(line);
 422 }
 423
 424 /*
 425  * Return the name of the network whose address is given.
 426  * The address is assumed to be that of a net or subnet, not a host.
 427  */
 428 char *
 429 netname(struct sockaddr *sa)
 430 {
 431         const char *cp = 0;
 432         static char line[MAXHOSTNAMELEN + 1];
 433         struct netent *np = 0;
 434         u_long net, mask;
 435         u_long i;
 436         int subnetshift;
 437
 438         switch (sa->sa_family) {
 439
 440         case AF_INET:
 441             {   struct in_addr in;
 442                 in = ((struct sockaddr_in *)sa)->sin_addr;
 443
 444                 i = in.s_addr = ntohl(in.s_addr);
 445                 if (in.s_addr == 0)
 446                         cp = "default";
 447                 else if (!nflag) {
 448                         if (IN_CLASSA(i)) {
 449                                 mask = IN_CLASSA_NET;
 450                                 subnetshift = 8;
 451                         } else if (IN_CLASSB(i)) {
 452                                 mask = IN_CLASSB_NET;
 453                                 subnetshift = 8;
 454                         } else {
 455                                 mask = IN_CLASSC_NET;
 456                                 subnetshift = 4;
 457                         }
 458                         /*
 459                          * If there are more bits than the standard mask
 460                          * would suggest, subnets must be in use.
 461                          * Guess at the subnet mask, assuming reasonable
 462                          * width subnet fields.
 463                          */
 464                         while (in.s_addr &~ mask)
 465                                 mask = (long)mask >> subnetshift;
 466                         net = in.s_addr & mask;
 467                         while ((mask & 1) == 0)
 468                                 mask >>= 1, net >>= 1;
 469                         np = getnetbyaddr(net, AF_INET);
 470                         if (np != NULL)
 471                                 cp = np->n_name;
 472                 }
 473 #define C(x)    (unsigned)((x) & 0xff)
 474                 if (cp != NULL)
 475                         strncpy(line, cp, sizeof(line));
 476                 else if ((in.s_addr & 0xffffff) == 0)
 477                         sprintf(line, "%u", C(in.s_addr >> 24));
 478                 else if ((in.s_addr & 0xffff) == 0)
 479                         sprintf(line, "%u.%u", C(in.s_addr >> 24),
 480                             C(in.s_addr >> 16));
 481                 else if ((in.s_addr & 0xff) == 0)
 482                         sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 483                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 484                 else
 485                         sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 486                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 487                             C(in.s_addr));
 488 #undef C
 489                 break;
 490             }
 491
 492 #ifdef INET6
 493         case AF_INET6:
 494         {
 495                 struct sockaddr_in6 sin6; /* use static var for safety */
 496                 int niflags = 0;
 497 #ifdef NI_WITHSCOPEID
 498                 niflags = NI_WITHSCOPEID;
 499 #endif
 500
 501                 memset(&sin6, 0, sizeof(sin6));
 502                 memcpy(&sin6, sa, sa->sa_len);
 503                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 504                 sin6.sin6_family = AF_INET6;
 505 #ifdef __KAME__
 506                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 507                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 508                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 509                     sin6.sin6_scope_id == 0) {
 510                         sin6.sin6_scope_id =
 511                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 512                         sin6.sin6_addr.s6_addr[2] = 0;
 513                         sin6.sin6_addr.s6_addr[3] = 0;
 514                 }
 515 #endif
 516                 if (nflag)
 517                         niflags |= NI_NUMERICHOST;
 518                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 519                     line, sizeof(line), NULL, 0, niflags) != 0)
 520                         strncpy(line, "invalid", sizeof(line));
 521
 522                 return(line);
 523         }
 524 #endif
 525
 526         case AF_LINK:
 527                 return(link_ntoa((struct sockaddr_dl *)sa));
 528
 529
 530         default:
 531             {
 532                 /*
 533                  * Unknown address family; just render the raw
 534                  * data in sa->sa_data as hex values.
 535                  */
 536                 uint8_t *sp = (uint8_t *)sa->sa_data;
 537                 uint8_t *splim = (uint8_t *)sa + sa->sa_len;
 538                 char *cps = line + sprintf(line, "af %d:", sa->sa_family);
 539                 char *cpe = line + sizeof(line);
 540
 541                 while (sp < splim && cps < cpe)
 542                         cps += snprintf(cps, cpe - cps, " %02x", *sp++);
 543                 break;
 544             }
 545         }
 546         return(line);
 547 }
 548
 549 static void
 550 set_metric(char *value, int key)
 551 {
 552         int flag = 0;
 553         u_long noval, *valp = &noval;
 554
 555         switch (key) {
 556 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 557         caseof(K_MTU, RTV_MTU, rmx_mtu);
 558         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 559         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 560         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 561         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 562         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 563         caseof(K_RTT, RTV_RTT, rmx_rtt);
 564         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 565         }
 566         rtm_inits |= flag;
 567         if (lockrest || locking)
 568                 rt_metrics.rmx_locks |= flag;
 569         if (locking)
 570                 locking = 0;
 571         *valp = atoi(value);
 572 }
 573
 574 static void
 575 newroute(int argc, char **argv)
 576 {
 577         char *cmd;
 578         const char *err_str, *dest = "", *gateway = "";
 579         int ishost = 0, proxy = 0, ret, attempts, oerrno, flags = RTF_STATIC;
 580         int key;
 581         struct hostent *hp = 0;
 582
 583         if (uid != 0) {
 584                 errx(EX_NOPERM, "must be root to alter routing table");
 585         }
 586         cmd = argv[0];
 587         if (*cmd != 'g')
 588                 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 589         while (--argc > 0) {
 590                 if (**(++argv)== '-') {
 591                         switch (key = keyword(1 + *argv)) {
 592                         case K_LINK:
 593                                 af = AF_LINK;
 594                                 aflen = sizeof(struct sockaddr_dl);
 595                                 break;
 596                         case K_INET:
 597                                 af = AF_INET;
 598                                 aflen = sizeof(struct sockaddr_in);
 599                                 break;
 600 #ifdef INET6
 601                         case K_INET6:
 602                                 af = AF_INET6;
 603                                 aflen = sizeof(struct sockaddr_in6);
 604                                 break;
 605 #endif
 606                         case K_SA:
 607                                 af = PF_ROUTE;
 608                                 aflen = sizeof(union sockunion);
 609                                 break;
 610                         case K_IFACE:
 611                         case K_INTERFACE:
 612                                 iflag++;
 613                                 break;
 614                         case K_NOSTATIC:
 615                                 flags &= ~RTF_STATIC;
 616                                 break;
 617                         case K_LLINFO:
 618                                 flags |= RTF_LLINFO;
 619                                 break;
 620                         case K_LOCK:
 621                                 locking = 1;
 622                                 break;
 623                         case K_LOCKREST:
 624                                 lockrest = 1;
 625                                 break;
 626                         case K_HOST:
 627                                 forcehost++;
 628                                 break;
 629                         case K_REJECT:
 630                                 flags |= RTF_REJECT;
 631                                 break;
 632                         case K_BLACKHOLE:
 633                                 flags |= RTF_BLACKHOLE;
 634                                 break;
 635                         case K_PROTO1:
 636                                 flags |= RTF_PROTO1;
 637                                 break;
 638                         case K_PROTO2:
 639                                 flags |= RTF_PROTO2;
 640                                 break;
 641                         case K_PROXY:
 642                                 proxy = 1;
 643                                 break;
 644                         case K_CLONING:
 645                                 flags |= RTF_CLONING;
 646                                 break;
 647                         case K_XRESOLVE:
 648                                 flags |= RTF_XRESOLVE;
 649                                 break;
 650                         case K_STATIC:
 651                                 flags |= RTF_STATIC;
 652                                 break;
 653                         case K_IFA:
 654                                 if (--argc == 0)
 655                                         usage(NULL);
 656                                 getaddr(RTA_IFA, *++argv, 0);
 657                                 break;
 658                         case K_IFP:
 659                                 if (--argc == 0)
 660                                         usage(NULL);
 661                                 getaddr(RTA_IFP, *++argv, 0);
 662                                 break;
 663                         case K_GENMASK:
 664                                 if (--argc == 0)
 665                                         usage(NULL);
 666                                 getaddr(RTA_GENMASK, *++argv, 0);
 667                                 break;
 668                         case K_GATEWAY:
 669                                 if (--argc == 0)
 670                                         usage(NULL);
 671                                 getaddr(RTA_GATEWAY, *++argv, 0);
 672                                 break;
 673                         case K_DST:
 674                                 if (--argc == 0)
 675                                         usage(NULL);
 676                                 ishost = getaddr(RTA_DST, *++argv, &hp);
 677                                 dest = *argv;
 678                                 break;
 679                         case K_NETMASK:
 680                                 if (--argc == 0)
 681                                         usage(NULL);
 682                                 getaddr(RTA_NETMASK, *++argv, 0);
 683                                 /* FALLTHROUGH */
 684                         case K_NET:
 685                                 forcenet++;
 686                                 break;
 687                         case K_PREFIXLEN:
 688                                 if (--argc == 0)
 689                                         usage(NULL);
 690                                 if (prefixlen(*++argv) == -1) {
 691                                         forcenet = 0;
 692                                         ishost = 1;
 693                                 } else {
 694                                         forcenet = 1;
 695                                         ishost = 0;
 696                                 }
 697                                 break;
 698                         case K_MPLS:
 699                                 af = AF_MPLS;
 700                                 aflen = sizeof(struct sockaddr_mpls);
 701                                 break;
 702                         case K_POP:
 703                                 flags |= RTF_MPLSOPS;
 704                                 af = AF_MPLS;
 705                                 mplsop = MPLSLOP_POP;
 706                                 switch(++popcount){
 707                                         case 1:
 708                                                 getaddr(RTA_MPLS1, "", 0);
 709                                                 break;
 710                                         case 2:
 711                                                 getaddr(RTA_MPLS2, "", 0);
 712                                                 break;
 713                                         case 3:
 714                                                 getaddr(RTA_MPLS3, "", 0);
 715                                                 break;
 716                                 }
 717                                 break;
 718                         case K_PUSH:
 719                         case K_SWAP:
 720                                 if (popcount > 0) {
 721                                         warnx("Push or swap after pop. Ignoring.");
 722                                         break;
 723                                 }
 724                                 if (key == K_PUSH) {
 725                                         mplsop = MPLSLOP_PUSH;
 726                                         ++pushcount;
 727                                 } else {
 728                                         if (pushcount > 0) {
 729                                                 warnx("Swap after push. Ignoring.");
 730                                                 break;
 731                                         }
 732                                         if (swapcount > 0) {
 733                                                 warnx("Too many swaps. Ignoring.");
 734                                                 break;
 735                                         }
 736                                         mplsop = MPLSLOP_SWAP;
 737                                         ++swapcount;
 738                                 }
 739                                 flags |= RTF_MPLSOPS;
 740                                 af = AF_MPLS;
 741                                 aflen = sizeof(struct sockaddr_mpls);
 742                                 if (--argc == 0)
 743                                         usage(NULL);
 744                                 switch(pushcount + swapcount){
 745                                         case 1:
 746                                                 getaddr(RTA_MPLS1, *++argv, 0);
 747                                                 break;
 748                                         case 2:
 749                                                 getaddr(RTA_MPLS2, *++argv, 0);
 750                                                 break;
 751                                         case 3:
 752                                                 getaddr(RTA_MPLS3, *++argv, 0);
 753                                                 break;
 754                                 }
 755                                 break;
 756                         case K_MTU:
 757                         case K_HOPCOUNT:
 758                         case K_EXPIRE:
 759                         case K_RECVPIPE:
 760                         case K_SENDPIPE:
 761                         case K_SSTHRESH:
 762                         case K_RTT:
 763                         case K_RTTVAR:
 764                                 if (--argc == 0)
 765                                         usage(NULL);
 766                                 set_metric(*++argv, key);
 767                                 break;
 768                         default:
 769                                 usage(1+*argv);
 770                         }
 771                 } else {
 772                         if ((rtm_addrs & RTA_DST) == 0) {
 773                                 dest = *argv;
 774                                 ishost = getaddr(RTA_DST, *argv, &hp);
 775                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 776                                 gateway = *argv;
 777                                 getaddr(RTA_GATEWAY, *argv, &hp);
 778                         } else {
 779                                 getaddr(RTA_NETMASK, *argv, 0);
 780                                 forcenet = 1;
 781                         }
 782                 }
 783         }
 784         if (forcehost) {
 785                 ishost = 1;
 786 #ifdef INET6
 787                 if (af == AF_INET6) {
 788                         rtm_addrs &= ~RTA_NETMASK;
 789                         memset((void *)&so_mask, 0, sizeof(so_mask));
 790                 }
 791 #endif
 792         }
 793         if (forcenet)
 794                 ishost = 0;
 795         flags |= RTF_UP;
 796         if (ishost)
 797                 flags |= RTF_HOST;
 798         if (iflag == 0)
 799                 flags |= RTF_GATEWAY;
 800         if (proxy) {
 801                 so_dst.sinarp.sin_other = SIN_PROXY;
 802                 flags |= RTF_ANNOUNCE;
 803         }
 804         for (attempts = 1; ; attempts++) {
 805                 errno = 0;
 806                 if ((ret = rtmsg(*cmd, flags)) == 0)
 807                         break;
 808                 if (errno != ENETUNREACH && errno != ESRCH)
 809                         break;
 810                 if (af == AF_INET && *gateway != '\0' &&
 811                     hp != NULL && hp->h_addr_list[1] != NULL) {
 812                         hp->h_addr_list++;
 813                         memmove(&so_gate.sin.sin_addr,
 814                                 hp->h_addr_list[0],
 815                                 MIN((size_t)hp->h_length,
 816                                     sizeof(so_gate.sin.sin_addr)));
 817                 } else
 818                         break;
 819         }
 820         if (*cmd == 'g')
 821                 exit(0);
 822         if (!qflag) {
 823                 oerrno = errno;
 824                 printf("%s %s %s", cmd, ishost? "host" : "net", dest);
 825                 if (*gateway != '\0') {
 826                         printf(": gateway %s", gateway);
 827                         if (attempts > 1 && ret == 0 && af == AF_INET)
 828                             printf(" (%s)",
 829                                 inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));
 830                 }
 831                 if (ret == 0) {
 832                         printf("\n");
 833                 } else {
 834                         switch (oerrno) {
 835                         case ESRCH:
 836                                 err_str = "not in table";
 837                                 break;
 838                         case EBUSY:
 839                                 err_str = "entry in use";
 840                                 break;
 841                         case ENOBUFS:
 842                                 err_str = "routing table overflow";
 843                                 break;
 844                         case EDQUOT: /* handle recursion avoidance in
 845                                         rt_setgate() */
 846                                 err_str = "gateway uses the same route";
 847                                 break;
 848                         default:
 849                                 err_str = strerror(oerrno);
 850                                 break;
 851                         }
 852                         printf(": %s\n", err_str);
 853                 }
 854         }
 855         exit(ret != 0);
 856 }
 857
 858 static void
 859 inet_makenetandmask(u_long net, struct sockaddr_in *in, u_long bits)
 860 {
 861         u_long addr, mask = 0;
 862         char *cp;
 863
 864         rtm_addrs |= RTA_NETMASK;
 865         /*
 866          * XXX: This approach unable to handle 0.0.0.1/32 correctly
 867          * as inet_network() converts 0.0.0.1 and 1 equally.
 868          */
 869         if (net <= 0xff)
 870                 addr = net << IN_CLASSA_NSHIFT;
 871         else if (net <= 0xffff)
 872                 addr = net << IN_CLASSB_NSHIFT;
 873         else if (net <= 0xffffff)
 874                 addr = net << IN_CLASSC_NSHIFT;
 875         else
 876                 addr = net;
 877
 878         if (bits != 0)
 879                 mask = 0xffffffff << (32 - bits);
 880         else if (net == 0)
 881                 mask = 0;
 882         else if (IN_CLASSA(addr))
 883                 mask = IN_CLASSA_NET;
 884         else if (IN_CLASSB(addr))
 885                 mask = IN_CLASSB_NET;
 886         else if (IN_CLASSC(addr))
 887                 mask = IN_CLASSC_NET;
 888         else if (IN_MULTICAST(addr))
 889                 mask = IN_CLASSD_NET;
 890         else
 891                 mask = 0xffffffff;
 892
 893         in->sin_addr.s_addr = htonl(addr);
 894         in = &so_mask.sin;
 895         in->sin_addr.s_addr = htonl(mask);
 896         in->sin_len = 0;
 897         in->sin_family = 0;
 898         cp = (char *)(&in->sin_addr + 1);
 899         while (*--cp == 0 && cp > (char *)in)
 900                 ;
 901         in->sin_len = 1 + cp - (char *)in;
 902 }
 903
 904 #ifdef INET6
 905 /*
 906  * XXX the function may need more improvement...
 907  */
 908 static int
 909 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
 910 {
 911         struct in6_addr in6;
 912
 913         if (plen == NULL) {
 914                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
 915                     sin6->sin6_scope_id == 0) {
 916                         plen = "0";
 917                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
 918                         /* aggregatable global unicast - RFC2374 */
 919                         memset(&in6, 0, sizeof(in6));
 920                         if (memcmp(&sin6->sin6_addr.s6_addr[8],
 921                                    &in6.s6_addr[8], 8) == 0)
 922                                 plen = "64";
 923                 }
 924         }
 925
 926         if (plen == NULL || strcmp(plen, "128") == 0)
 927                 return(1);
 928         rtm_addrs |= RTA_NETMASK;
 929         prefixlen(plen);
 930         return(0);
 931 }
 932 #endif
 933
 934 /*
 935  * Interpret an argument as a network address of some kind,
 936  * returning 1 if a host address, 0 if a network address.
 937  */
 938 static int
 939 getaddr(int which, const char *str, struct hostent **hpp)
 940 {
 941         sup su;
 942         struct hostent *hp;
 943         struct netent *np;
 944         u_long val;
 945         char *q;
 946         int afamily;  /* local copy of af so we can change it */
 947
 948         if (af == 0) {
 949                 af = AF_INET;
 950                 aflen = sizeof(struct sockaddr_in);
 951         }
 952         afamily = af;
 953         rtm_addrs |= which;
 954         switch (which) {
 955         case RTA_DST:
 956                 su = &so_dst;
 957                 break;
 958         case RTA_GATEWAY:
 959                 su = &so_gate;
 960                 if (iflag) {
 961                         struct ifaddrs *ifap, *ifa;
 962                         struct sockaddr_dl *sdl = NULL;
 963
 964                         if (getifaddrs(&ifap))
 965                                 err(1, "getifaddrs");
 966
 967                         for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
 968                                 if (ifa->ifa_addr->sa_family != AF_LINK)
 969                                         continue;
 970
 971                                 if (strcmp(str, ifa->ifa_name) != 0)
 972                                         continue;
 973
 974                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
 975                         }
 976                         /* If we found it, then use it */
 977                         if (sdl != NULL) {
 978                                 /*
 979                                  * Copy is safe since we have a
 980                                  * sockaddr_storage member in sockunion{}.
 981                                  * Note that we need to copy before calling
 982                                  * freeifaddrs().
 983                                  *
 984                                  * Interface routes are routed only by their
 985                                  * sdl_index or interface name (we provide
 986                                  * both here), not by the ARP address of the
 987                                  * local interface (alen, slen = 0).
 988                                  */
 989                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
 990                                 su->sdl.sdl_alen = 0;
 991                                 su->sdl.sdl_slen = 0;
 992                         }
 993                         freeifaddrs(ifap);
 994                         if (sdl != NULL)
 995                                 return(1);
 996                 }
 997                 break;
 998         case RTA_NETMASK:
 999                 su = &so_mask;
1000                 break;
1001         case RTA_GENMASK:
1002                 su = &so_genmask;
1003                 break;
1004         case RTA_IFP:
1005                 su = &so_ifp;
1006                 afamily = AF_LINK;
1007                 break;
1008         case RTA_IFA:
1009                 su = &so_ifa;
1010                 break;
1011         case RTA_MPLS1:
1012                 su = &so_mpls1;
1013                 break;
1014         case RTA_MPLS2:
1015                 su = &so_mpls2;
1016                 break;
1017         case RTA_MPLS3:
1018                 su = &so_mpls3;
1019                 break;
1020         default:
1021                 usage("internal error");
1022                 /*NOTREACHED*/
1023         }
1024         su->sa.sa_len = aflen;
1025         su->sa.sa_family = afamily; /* cases that don't want it have left
1026                                        already */
1027         if (strcmp(str, "default") == 0) {
1028                 /*
1029                  * Default is net 0.0.0.0/0
1030                  */
1031                 switch (which) {
1032                 case RTA_DST:
1033                         forcenet++;
1034                         /* bzero(su, sizeof(*su)); *//* for readability */
1035                         getaddr(RTA_NETMASK, str, 0);
1036                         break;
1037                 case RTA_NETMASK:
1038                 case RTA_GENMASK:
1039                         /* bzero(su, sizeof(*su)); *//* for readability */
1040                         break;
1041                 }
1042                 return(0);
1043         }
1044         switch (afamily) {
1045 #ifdef INET6
1046         case AF_INET6:
1047         {
1048                 struct addrinfo hints, *res;
1049
1050                 q = NULL;
1051                 if (which == RTA_DST && (q = strchr(str, '/')) != NULL)
1052                         *q = '\0';
1053                 memset(&hints, 0, sizeof(hints));
1054                 hints.ai_family = afamily;      /*AF_INET6*/
1055                 hints.ai_flags = AI_NUMERICHOST;
1056                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
1057                 if (getaddrinfo(str, "0", &hints, &res) != 0 ||
1058                     res->ai_family != AF_INET6 ||
1059                     res->ai_addrlen != sizeof(su->sin6)) {
1060                         fprintf(stderr, "%s: bad value\n", str);
1061                         exit(1);
1062                 }
1063                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
1064 #ifdef __KAME__
1065                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
1066                      IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr)) &&
1067                     su->sin6.sin6_scope_id) {
1068                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1069                                 htons(su->sin6.sin6_scope_id);
1070                         su->sin6.sin6_scope_id = 0;
1071                 }
1072 #endif
1073                 freeaddrinfo(res);
1074                 if (q != NULL)
1075                         *q++ = '/';
1076                 if (which == RTA_DST)
1077                         return(inet6_makenetandmask(&su->sin6, q));
1078                 return(0);
1079         }
1080 #endif /* INET6 */
1081
1082         case AF_LINK:
1083                 link_addr(str, &su->sdl);
1084                 return(1);
1085
1086         case PF_ROUTE:
1087                 su->sa.sa_len = sizeof(*su);
1088                 sockaddr(str, &su->sa);
1089                 return(1);
1090
1091         case AF_MPLS:
1092         {
1093                 mpls_label_t label;
1094
1095                 bzero(su, sizeof(*su));
1096                 su->sa.sa_len = sizeof(*su);
1097                 su->sa.sa_family = AF_MPLS;
1098                 su->smpls.smpls_op = mplsop;
1099                 if (mplsop != MPLSLOP_POP && mplsop != MPLSLOP_POPALL &&
1100                     *str != '\0') {
1101                         if (sscanf(str, "%u", &label) != 1)
1102                                 errx(EX_NOHOST, "bad address: %s", str);
1103                         su->smpls.smpls_label = htonl(label);
1104                 }
1105                 return(1);
1106         }
1107
1108         case AF_INET:
1109         default:
1110                 break;
1111         }
1112
1113         if (hpp == NULL)
1114                 hpp = &hp;
1115         *hpp = NULL;
1116
1117         q = strchr(str,'/');
1118         if (q != NULL && which == RTA_DST) {
1119                 *q = '\0';
1120                 if ((val = inet_network(str)) != INADDR_NONE) {
1121                         inet_makenetandmask(
1122                                 val, &su->sin, strtoul(q+1, 0, 0));
1123                         return(0);
1124                 }
1125                 *q = '/';
1126         }
1127         if ((which != RTA_DST || forcenet == 0) &&
1128             inet_aton(str, &su->sin.sin_addr)) {
1129                 val = su->sin.sin_addr.s_addr;
1130                 if (which != RTA_DST ||
1131                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1132                         return(1);
1133                 else {
1134                         val = ntohl(val);
1135                         goto netdone;
1136                 }
1137         }
1138         if (which == RTA_DST && forcehost == 0 &&
1139             ((val = inet_network(str)) != INADDR_NONE ||
1140             ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) {
1141 netdone:
1142                 inet_makenetandmask(val, &su->sin, 0);
1143                 return(0);
1144         }
1145         hp = gethostbyname(str);
1146         if (hp != NULL) {
1147                 *hpp = hp;
1148                 su->sin.sin_family = hp->h_addrtype;
1149                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1150                     MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr)));
1151                 return(1);
1152         }
1153         errx(EX_NOHOST, "bad address: %s", str);
1154 }
1155
1156 static int
1157 prefixlen(const char *len_str)
1158 {
1159         int len = atoi(len_str), q, r;
1160         int max;
1161         char *p;
1162
1163         rtm_addrs |= RTA_NETMASK;
1164         switch (af) {
1165 #ifdef INET6
1166         case AF_INET6:
1167                 max = 128;
1168                 p = (char *)&so_mask.sin6.sin6_addr;
1169                 break;
1170 #endif
1171         case AF_INET:
1172                 max = 32;
1173                 p = (char *)&so_mask.sin.sin_addr;
1174                 break;
1175         default:
1176                 fprintf(stderr, "prefixlen not supported in this af\n");
1177                 exit(1);
1178                 /*NOTREACHED*/
1179         }
1180
1181         if (len < 0 || max < len) {
1182                 fprintf(stderr, "%s: bad value\n", len_str);
1183                 exit(1);
1184         }
1185
1186         q = len >> 3;
1187         r = len & 7;
1188         so_mask.sa.sa_family = af;
1189         so_mask.sa.sa_len = aflen;
1190         memset((void *)p, 0, max / 8);
1191         if (q > 0)
1192                 memset((void *)p, 0xff, q);
1193         if (r > 0)
1194                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1195         if (len == max)
1196                 return(-1);
1197         else
1198                 return(len);
1199 }
1200
1201 static void
1202 interfaces(void)
1203 {
1204         size_t needed;
1205         int mib[6];
1206         char *buf, *lim, *next;
1207         struct rt_msghdr *rtm;
1208
1209         mib[0] = CTL_NET;
1210         mib[1] = PF_ROUTE;
1211         mib[2] = 0;             /* protocol */
1212         mib[3] = 0;             /* wildcard address family */
1213         mib[4] = NET_RT_IFLIST;
1214         mib[5] = 0;             /* no flags */
1215         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1216                 err(EX_OSERR, "route-sysctl-estimate");
1217         if ((buf = malloc(needed)) == NULL)
1218                 errx(EX_OSERR, "malloc failed");
1219         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
1220                 err(EX_OSERR, "actual retrieval of interface table");
1221         lim = buf + needed;
1222         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1223                 rtm = (struct rt_msghdr *)next;
1224                 print_rtmsg(rtm, rtm->rtm_msglen);
1225         }
1226 }
1227
1228 static void
1229 monitor(void)
1230 {
1231         int n;
1232         char msg[2048];
1233
1234         verbose = 1;
1235         if (debugonly) {
1236                 interfaces();
1237                 exit(0);
1238         }
1239         for (;;) {
1240                 time_t now;
1241                 n = read(s, msg, 2048);
1242                 now = time(NULL);
1243                 printf("\ngot message of size %d on %s", n, ctime(&now));
1244                 print_rtmsg((struct rt_msghdr *)msg, n);
1245         }
1246 }
1247
1248 struct {
1249         struct  rt_msghdr m_rtm;
1250         char    m_space[512];
1251 } m_rtmsg;
1252
1253 static int
1254 rtmsg(int cmd, int flags)
1255 {
1256         static int seq;
1257         int rlen;
1258         char *cp = m_rtmsg.m_space;
1259         int l;
1260
1261 #define NEXTADDR(w, u) \
1262         if (rtm_addrs & (w)) {\
1263             l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\
1264             if (verbose) sodump(&(u),"u");\
1265         }
1266
1267         errno = 0;
1268         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1269         if (cmd == 'a')
1270                 cmd = RTM_ADD;
1271         else if (cmd == 'c')
1272                 cmd = RTM_CHANGE;
1273         else if (cmd == 'g') {
1274                 cmd = RTM_GET;
1275                 if (so_ifp.sa.sa_family == 0) {
1276                         so_ifp.sa.sa_family = AF_LINK;
1277                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1278                         rtm_addrs |= RTA_IFP;
1279                 }
1280         } else
1281                 cmd = RTM_DELETE;
1282 #define rtm m_rtmsg.m_rtm
1283         rtm.rtm_type = cmd;
1284         rtm.rtm_flags = flags;
1285         rtm.rtm_version = RTM_VERSION;
1286         rtm.rtm_seq = ++seq;
1287         rtm.rtm_addrs = rtm_addrs;
1288         rtm.rtm_rmx = rt_metrics;
1289         rtm.rtm_inits = rtm_inits;
1290
1291         if (rtm_addrs & RTA_NETMASK)
1292                 mask_addr();
1293         NEXTADDR(RTA_DST, so_dst);
1294         NEXTADDR(RTA_GATEWAY, so_gate);
1295         NEXTADDR(RTA_NETMASK, so_mask);
1296         NEXTADDR(RTA_GENMASK, so_genmask);
1297         NEXTADDR(RTA_IFP, so_ifp);
1298         NEXTADDR(RTA_IFA, so_ifa);
1299         NEXTADDR(RTA_MPLS1, so_mpls1);
1300         NEXTADDR(RTA_MPLS2, so_mpls2);
1301         NEXTADDR(RTA_MPLS3, so_mpls3);
1302         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1303         if (verbose)
1304                 print_rtmsg(&rtm, l);
1305         if (debugonly)
1306                 return(0);
1307         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1308                 warn("writing to routing socket");
1309                 return(-1);
1310         }
1311         if (cmd == RTM_GET) {
1312                 do {
1313                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1314                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1315                 if (l < 0)
1316                         warn("read from routing socket");
1317                 else
1318                         print_getmsg(&rtm, l);
1319         }
1320 #undef rtm
1321         return(0);
1322 }
1323
1324 static void
1325 mask_addr(void)
1326 {
1327         int olen = so_mask.sa.sa_len;
1328         char *cp1 = olen + (char *)&so_mask, *cp2;
1329
1330         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1331                 if (*--cp1 != 0) {
1332                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1333                         break;
1334                 }
1335         if ((rtm_addrs & RTA_DST) == 0)
1336                 return;
1337         switch (so_dst.sa.sa_family) {
1338         case AF_INET:
1339 #ifdef INET6
1340         case AF_INET6:
1341 #endif
1342         case 0:
1343                 return;
1344         }
1345         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1346         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1347         while (cp2 > cp1)
1348                 *--cp2 = 0;
1349         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1350         while (cp1 > so_dst.sa.sa_data)
1351                 *--cp1 &= *--cp2;
1352 }
1353
1354 const char *msgtypes[] = {
1355         "",
1356         "RTM_ADD: Add Route",
1357         "RTM_DELETE: Delete Route",
1358         "RTM_CHANGE: Change Metrics or flags",
1359         "RTM_GET: Report Metrics",
1360         "RTM_LOSING: Kernel Suspects Partitioning",
1361         "RTM_REDIRECT: Told to use different route",
1362         "RTM_MISS: Lookup failed on this address",
1363         "RTM_LOCK: fix specified metrics",
1364         "RTM_OLDADD: caused by SIOCADDRT",
1365         "RTM_OLDDEL: caused by SIOCDELRT",
1366         "RTM_RESOLVE: Route created by cloning",
1367         "RTM_NEWADDR: address being added to iface",
1368         "RTM_DELADDR: address being removed from iface",
1369         "RTM_IFINFO: iface status change",
1370         "RTM_NEWMADDR: new multicast group membership on iface",
1371         "RTM_DELMADDR: multicast group membership removed from iface",
1372         "RTM_IFANNOUNCE: interface arrival/departure",
1373         0,
1374 };
1375
1376 char metricnames[] =
1377 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
1378 "\1mtu";
1379 char routeflags[] =
1380 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
1381 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
1382 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
1383 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
1384 char ifnetflags[] =
1385 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1386 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1387 "\017LINK2\020MULTICAST";
1388 char addrnames[] =
1389 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"
1390 "\011MPLS1\012MPLS2\013MPLS3";
1391
1392 static void
1393 print_rtmsg(struct rt_msghdr *rtm, int msglen __unused)
1394 {
1395         struct if_msghdr *ifm;
1396         struct ifa_msghdr *ifam;
1397 #ifdef RTM_NEWMADDR
1398         struct ifma_msghdr *ifmam;
1399 #endif
1400         struct if_announcemsghdr *ifan;
1401
1402         if (verbose == 0)
1403                 return;
1404         if (rtm->rtm_version != RTM_VERSION) {
1405                 printf("routing message version %d not understood\n",
1406                     rtm->rtm_version);
1407                 return;
1408         }
1409         if (msgtypes[rtm->rtm_type] != NULL)
1410                 printf("%s: ", msgtypes[rtm->rtm_type]);
1411         else
1412                 printf("#%d: ", rtm->rtm_type);
1413         printf("len %d, ", rtm->rtm_msglen);
1414         switch (rtm->rtm_type) {
1415         case RTM_IFINFO:
1416                 ifm = (struct if_msghdr *)rtm;
1417                 printf("if# %d, flags:", ifm->ifm_index);
1418                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1419                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
1420                 break;
1421         case RTM_NEWADDR:
1422         case RTM_DELADDR:
1423                 ifam = (struct ifa_msghdr *)rtm;
1424                 printf("metric %d, flags:", ifam->ifam_metric);
1425                 bprintf(stdout, ifam->ifam_flags, routeflags);
1426                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs);
1427                 break;
1428 #ifdef RTM_NEWMADDR
1429         case RTM_NEWMADDR:
1430         case RTM_DELMADDR:
1431                 ifmam = (struct ifma_msghdr *)rtm;
1432                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs);
1433                 break;
1434 #endif
1435         case RTM_IFANNOUNCE:
1436                 ifan = (struct if_announcemsghdr *)rtm;
1437                 printf("if# %d, what: ", ifan->ifan_index);
1438                 switch (ifan->ifan_what) {
1439                 case IFAN_ARRIVAL:
1440                         printf("arrival");
1441                         break;
1442                 case IFAN_DEPARTURE:
1443                         printf("departure");
1444                         break;
1445                 default:
1446                         printf("#%d", ifan->ifan_what);
1447                         break;
1448                 }
1449                 printf("\n");
1450                 break;
1451
1452         default:
1453                 printf("pid: %ld, seq %d, errno %d, flags:",
1454                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1455                 bprintf(stdout, rtm->rtm_flags, routeflags);
1456                 pmsg_common(rtm);
1457         }
1458 }
1459
1460 static void
1461 print_getmsg(struct rt_msghdr *rtm, int msglen)
1462 {
1463         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1464         struct sockaddr_dl *ifp = NULL;
1465         struct sockaddr *sa;
1466         char *cp;
1467         int i;
1468
1469         printf("   route to: %s\n", routename(&so_dst.sa));
1470         if (rtm->rtm_version != RTM_VERSION) {
1471                 warnx("routing message version %d not understood",
1472                      rtm->rtm_version);
1473                 return;
1474         }
1475         if (rtm->rtm_msglen > msglen) {
1476                 warnx("message length mismatch, in packet %d, returned %d",
1477                       rtm->rtm_msglen, msglen);
1478         }
1479         if (rtm->rtm_errno != 0)  {
1480                 errno = rtm->rtm_errno;
1481                 warn("message indicates error %d", errno);
1482                 return;
1483         }
1484         cp = ((char *)(rtm + 1));
1485         if (rtm->rtm_addrs)
1486                 for (i = 1; i != 0; i <<= 1)
1487                         if (i & rtm->rtm_addrs) {
1488                                 sa = (struct sockaddr *)cp;
1489                                 switch (i) {
1490                                 case RTA_DST:
1491                                         dst = sa;
1492                                         break;
1493                                 case RTA_GATEWAY:
1494                                         gate = sa;
1495                                         break;
1496                                 case RTA_NETMASK:
1497                                         mask = sa;
1498                                         break;
1499                                 case RTA_IFP:
1500                                         if (sa->sa_family == AF_LINK &&
1501                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1502                                                 ifp = (struct sockaddr_dl *)sa;
1503                                         break;
1504                                 }
1505                                 ADVANCE(cp, sa);
1506                         }
1507         if (dst != NULL && mask != NULL)
1508                 mask->sa_family = dst->sa_family;       /* XXX */
1509         if (dst != NULL)
1510                 printf("destination: %s\n", routename(dst));
1511         if (mask != NULL) {
1512                 int savenflag = nflag;
1513
1514                 nflag = 1;
1515                 printf("       mask: %s\n", routename(mask));
1516                 nflag = savenflag;
1517         }
1518         if (gate != NULL && rtm->rtm_flags & RTF_GATEWAY)
1519                 printf("    gateway: %s\n", routename(gate));
1520         if (ifp != NULL)
1521                 printf("  interface: %.*s\n",
1522                     ifp->sdl_nlen, ifp->sdl_data);
1523         printf("      flags: ");
1524         bprintf(stdout, rtm->rtm_flags, routeflags);
1525
1526 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1527 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1528
1529         printf("\n%s\n", "\
1530  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire");
1531         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1532         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1533         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1534         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1535         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR));
1536         printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT));
1537         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1538         if (rtm->rtm_rmx.rmx_expire != 0)
1539                 rtm->rtm_rmx.rmx_expire -= time(0);
1540         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1541 #undef lock
1542 #undef msec
1543 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1544         if (verbose)
1545                 pmsg_common(rtm);
1546         else if (rtm->rtm_addrs &~ RTA_IGN) {
1547                 printf("sockaddrs: ");
1548                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1549                 putchar('\n');
1550         }
1551 #undef  RTA_IGN
1552 }
1553
1554 static void
1555 pmsg_common(struct rt_msghdr *rtm)
1556 {
1557         printf("\nlocks: ");
1558         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1559         printf(" inits: ");
1560         bprintf(stdout, rtm->rtm_inits, metricnames);
1561         pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs);
1562 }
1563
1564 static void
1565 pmsg_addrs(char *cp, int addrs)
1566 {
1567         struct sockaddr *sa;
1568         int i;
1569
1570         if (addrs == 0) {
1571                 putchar('\n');
1572                 return;
1573         }
1574         printf("\nsockaddrs: ");
1575         bprintf(stdout, addrs, addrnames);
1576         putchar('\n');
1577         for (i = 1; i != 0; i <<= 1)
1578                 if (i & addrs) {
1579                         sa = (struct sockaddr *)cp;
1580                         printf(" %s", routename(sa));
1581                         ADVANCE(cp, sa);
1582                 }
1583         putchar('\n');
1584         fflush(stdout);
1585 }
1586
1587 static void
1588 bprintf(FILE *fp, int b, u_char *str)
1589 {
1590         int i;
1591         int gotsome = 0;
1592
1593         if (b == 0)
1594                 return;
1595         while ((i = *str++) != 0) {
1596                 if (b & (1 << (i-1))) {
1597                         if (!gotsome)
1598                                 i = '<';
1599                         else
1600                                 i = ',';
1601                         putc(i, fp);
1602                         gotsome = 1;
1603                         for (; (i = *str) > 32; str++)
1604                                 putc(i, fp);
1605                 } else
1606                         while (*str > 32)
1607                                 str++;
1608         }
1609         if (gotsome)
1610                 putc('>', fp);
1611 }
1612
1613 int
1614 keyword(const char *cp)
1615 {
1616         struct keytab *kt = keywords;
1617
1618         while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
1619                 kt++;
1620         return(kt->kt_i);
1621 }
1622
1623 static void
1624 sodump(sup su, const char *which)
1625 {
1626         switch (su->sa.sa_family) {
1627         case AF_LINK:
1628                 printf("%s: link %s; ",
1629                     which, link_ntoa(&su->sdl));
1630                 break;
1631         case AF_INET:
1632                 printf("%s: inet %s; ",
1633                     which, inet_ntoa(su->sin.sin_addr));
1634                 break;
1635         }
1636         fflush(stdout);
1637 }
1638
1639 /* States*/
1640 #define VIRGIN  0
1641 #define GOTONE  1
1642 #define GOTTWO  2
1643 /* Inputs */
1644 #define DIGIT   (4*0)
1645 #define END     (4*1)
1646 #define DELIM   (4*2)
1647
1648 static void
1649 sockaddr(const char *addr, struct sockaddr *sa)
1650 {
1651         char *cp = (char *)sa;
1652         int size = sa->sa_len;
1653         char *cplim = cp + size;
1654         int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1655
1656         memset(cp, 0, size);
1657         cp++;
1658         do {
1659                 if ((*addr >= '0') && (*addr <= '9')) {
1660                         new = *addr - '0';
1661                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1662                         new = *addr - 'a' + 10;
1663                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1664                         new = *addr - 'A' + 10;
1665                 } else if (*addr == '\0')
1666                         state |= END;
1667                 else
1668                         state |= DELIM;
1669                 addr++;
1670                 switch (state /* | INPUT */) {
1671                 case GOTTWO | DIGIT:
1672                         *cp++ = byte; /*FALLTHROUGH*/
1673                 case VIRGIN | DIGIT:
1674                         state = GOTONE; byte = new; continue;
1675                 case GOTONE | DIGIT:
1676                         state = GOTTWO; byte = new + (byte << 4); continue;
1677                 default: /* | DELIM */
1678                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1679                 case GOTONE | END:
1680                 case GOTTWO | END:
1681                         *cp++ = byte; /* FALLTHROUGH */
1682                 case VIRGIN | END:
1683                         break;
1684                 }
1685                 break;
1686         } while (cp < cplim);
1687         sa->sa_len = cp - (char *)sa;
1688 }