sbin/route/route.c

   1 /*
   2  * Copyright (c) 1983, 1989, 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef lint
  31 static const char copyright[] =
  32 "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\
  33         The Regents of the University of California.  All rights reserved.\n";
  34 #endif /* not lint */
  35
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)route.c     8.6 (Berkeley) 4/28/95";
  39 #endif
  40 #endif /* not lint */
  41
  42 #include <sys/cdefs.h>
  43 __FBSDID("$FreeBSD$");
  44
  45 #include <sys/param.h>
  46 #include <sys/file.h>
  47 #include <sys/socket.h>
  48 #include <sys/ioctl.h>
  49 #include <sys/sysctl.h>
  50 #include <sys/types.h>
  51 #include <sys/queue.h>
  52
  53 #include <net/if.h>
  54 #include <net/route.h>
  55 #include <net/if_dl.h>
  56 #include <netinet/in.h>
  57 #include <netinet/if_ether.h>
  58 #include <netatalk/at.h>
  59 #include <arpa/inet.h>
  60 #include <netdb.h>
  61
  62 #include <ctype.h>
  63 #include <err.h>
  64 #include <errno.h>
  65 #include <paths.h>
  66 #include <stdio.h>
  67 #include <stdlib.h>
  68 #include <string.h>
  69 #include <sysexits.h>
  70 #include <unistd.h>
  71 #include <ifaddrs.h>
  72
  73 struct keytab {
  74         const char      *kt_cp;
  75         int     kt_i;
  76 } keywords[] = {
  77 #include "keywords.h"
  78         {0, 0}
  79 };
  80
  81 union   sockunion {
  82         struct  sockaddr sa;
  83         struct  sockaddr_in sin;
  84 #ifdef INET6
  85         struct  sockaddr_in6 sin6;
  86 #endif
  87         struct  sockaddr_at sat;
  88         struct  sockaddr_dl sdl;
  89         struct  sockaddr_inarp sinarp;
  90         struct  sockaddr_storage ss; /* added to avoid memory overrun */
  91 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp;
  92
  93 typedef union sockunion *sup;
  94 int     pid, rtm_addrs;
  95 int     s;
  96 int     forcehost, forcenet, doflush, nflag, af, qflag, tflag;
  97 int     iflag, verbose, aflen = sizeof (struct sockaddr_in);
  98 int     locking, lockrest, debugonly;
  99 struct  rt_metrics rt_metrics;
 100 u_long  rtm_inits;
 101 uid_t   uid;
 102 static int      defaultfib;
 103 static int      numfibs;
 104
 105 static int      atalk_aton(const char *, struct at_addr *);
 106 static char     *atalk_ntoa(struct at_addr);
 107 static void     bprintf(FILE *, int, u_char *);
 108 static void     flushroutes(int argc, char *argv[]);
 109 static int      flushroutes_fib(int);
 110 static int      getaddr(int, char *, struct hostent **);
 111 static int      keyword(const char *);
 112 static void     inet_makenetandmask(u_long, struct sockaddr_in *, u_long);
 113 #ifdef INET6
 114 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *);
 115 #endif
 116 static void     interfaces(void);
 117 static void     mask_addr(void);
 118 static void     monitor(int, char*[]);
 119 static const char       *netname(struct sockaddr *);
 120 static void     newroute(int, char **);
 121 static int      newroute_fib(int, char *, int);
 122 static void     pmsg_addrs(char *, int, size_t);
 123 static void     pmsg_common(struct rt_msghdr *, size_t);
 124 static int      prefixlen(const char *);
 125 static void     print_getmsg(struct rt_msghdr *, int, int);
 126 static void     print_rtmsg(struct rt_msghdr *, size_t);
 127 static const char       *routename(struct sockaddr *);
 128 static int      rtmsg(int, int, int);
 129 static void     set_metric(char *, int);
 130 static int      set_sofib(int);
 131 static int      set_procfib(int);
 132 static void     sockaddr(char *, struct sockaddr *);
 133 static void     sodump(sup, const char *);
 134 extern  char *iso_ntoa(void);
 135
 136 struct fibl {
 137         TAILQ_ENTRY(fibl)       fl_next;
 138
 139         int     fl_num;
 140         int     fl_error;
 141         int     fl_errno;
 142 };
 143 TAILQ_HEAD(fibl_head_t, fibl) fibl_head;
 144
 145 static int      fiboptlist_csv(const char *, struct fibl_head_t *);
 146 static int      fiboptlist_range(const char *, struct fibl_head_t *);
 147
 148 static void usage(const char *) __dead2;
 149
 150 void
 151 usage(const char *cp)
 152 {
 153         if (cp != NULL)
 154                 warnx("bad keyword: %s", cp);
 155         (void) fprintf(stderr,
 156             "usage: route [-dnqtv] command [[modifiers] args]\n");
 157         exit(EX_USAGE);
 158         /* NOTREACHED */
 159 }
 160
 161 int
 162 main(int argc, char **argv)
 163 {
 164         int ch;
 165         size_t len;
 166
 167         if (argc < 2)
 168                 usage(NULL);
 169
 170         while ((ch = getopt(argc, argv, "nqdtv")) != -1)
 171                 switch(ch) {
 172                 case 'n':
 173                         nflag = 1;
 174                         break;
 175                 case 'q':
 176                         qflag = 1;
 177                         break;
 178                 case 'v':
 179                         verbose = 1;
 180                         break;
 181                 case 't':
 182                         tflag = 1;
 183                         break;
 184                 case 'd':
 185                         debugonly = 1;
 186                         break;
 187                 case '?':
 188                 default:
 189                         usage(NULL);
 190                 }
 191         argc -= optind;
 192         argv += optind;
 193
 194         pid = getpid();
 195         uid = geteuid();
 196         if (tflag)
 197                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 198         else
 199                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 200         if (s < 0)
 201                 err(EX_OSERR, "socket");
 202
 203         len = sizeof(numfibs);
 204         if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1)
 205                 numfibs = -1;
 206
 207         len = sizeof(defaultfib);
 208         if (numfibs != -1 &&
 209             sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL,
 210                 0) == -1)
 211                 defaultfib = -1;
 212
 213         if (*argv != NULL)
 214                 switch (keyword(*argv)) {
 215                 case K_GET:
 216                 case K_SHOW:
 217                         uid = 0;
 218                         /* FALLTHROUGH */
 219
 220                 case K_CHANGE:
 221                 case K_ADD:
 222                 case K_DEL:
 223                 case K_DELETE:
 224                         newroute(argc, argv);
 225                         /* NOTREACHED */
 226
 227                 case K_MONITOR:
 228                         monitor(argc, argv);
 229                         /* NOTREACHED */
 230
 231                 case K_FLUSH:
 232                         flushroutes(argc, argv);
 233                         exit(0);
 234                         /* NOTREACHED */
 235                 }
 236         usage(*argv);
 237         /* NOTREACHED */
 238 }
 239
 240 static int
 241 set_sofib(int fib)
 242 {
 243
 244         if (fib < 0)
 245                 return (0);
 246         return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib,
 247             sizeof(fib)));
 248 }
 249
 250 static int
 251 set_procfib(int fib)
 252 {
 253
 254         if (fib < 0)
 255                 return (0);
 256         return (setfib(fib));
 257 }
 258
 259 static int
 260 fiboptlist_range(const char *arg, struct fibl_head_t *flh)
 261 {
 262         struct fibl *fl;
 263         char *str, *token, *endptr;
 264         int fib[2], i, error;
 265
 266         str = strdup(arg);
 267         error = 0;
 268         i = 0;
 269         while ((token = strsep(&str, "-")) != NULL) {
 270                 switch (i) {
 271                 case 0:
 272                 case 1:
 273                         fib[i] = strtol(token, &endptr, 0);
 274                         if (*endptr != '\0' || (fib[i] == 0 &&
 275                             (errno == EINVAL || errno == ERANGE)))
 276                                 error = 1;
 277                         break;
 278                 default:
 279                         error = 1;
 280                 }
 281                 if (error)
 282                         goto fiboptlist_range_ret;
 283                 i++;
 284         }
 285         if (fib[0] >= fib[1]) {
 286                 error = 1;
 287                 goto fiboptlist_range_ret;
 288         }
 289         for (i = fib[0]; i <= fib[1]; i++) {
 290                 fl = calloc(1, sizeof(*fl));
 291                 if (fl == NULL) {
 292                         error = 1;
 293                         goto fiboptlist_range_ret;
 294                 }
 295                 fl->fl_num = i;
 296                 TAILQ_INSERT_TAIL(flh, fl, fl_next);
 297         }
 298 fiboptlist_range_ret:
 299         free(str);
 300         return (error);
 301 }
 302
 303 #define ALLSTRLEN       64
 304 static int
 305 fiboptlist_csv(const char *arg, struct fibl_head_t *flh)
 306 {
 307         struct fibl *fl;
 308         char *str, *token, *endptr;
 309         int fib, error;
 310
 311         if (strcmp("all", arg) == 0) {
 312                 str = calloc(1, ALLSTRLEN);
 313                 if (str == NULL) {
 314                         error = 1;
 315                         goto fiboptlist_csv_ret;
 316                 }
 317                 if (numfibs > 1)
 318                         snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1);
 319                 else
 320                         snprintf(str, ALLSTRLEN - 1, "%d", 0);
 321         } else if (strcmp("default", arg) == 0) {
 322                 str = calloc(1, ALLSTRLEN);
 323                 if (str == NULL) {
 324                         error = 1;
 325                         goto fiboptlist_csv_ret;
 326                 }
 327                 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib);
 328         } else
 329                 str = strdup(arg);
 330
 331         error = 0;
 332         while ((token = strsep(&str, ",")) != NULL) {
 333                 if (*token != '-' && strchr(token, '-') != NULL) {
 334                         error = fiboptlist_range(token, flh);
 335                         if (error)
 336                                 goto fiboptlist_csv_ret;
 337                 } else {
 338                         fib = strtol(token, &endptr, 0);
 339                         if (*endptr != '\0' || (fib == 0 &&
 340                             (errno == EINVAL || errno == ERANGE))) {
 341                                 error = 1;
 342                                 goto fiboptlist_csv_ret;
 343                         }
 344                         fl = calloc(1, sizeof(*fl));
 345                         if (fl == NULL) {
 346                                 error = 1;
 347                                 goto fiboptlist_csv_ret;
 348                         }
 349                         fl->fl_num = fib;
 350                         TAILQ_INSERT_TAIL(flh, fl, fl_next);
 351                 }
 352         }
 353 fiboptlist_csv_ret:
 354         free(str);
 355         return (error);
 356 }
 357
 358 /*
 359  * Purge all entries in the routing tables not
 360  * associated with network interfaces.
 361  */
 362 static void
 363 flushroutes(int argc, char *argv[])
 364 {
 365         struct fibl *fl;
 366         int error;
 367
 368         if (uid != 0 && !debugonly) {
 369                 errx(EX_NOPERM, "must be root to alter routing table");
 370         }
 371         shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 372
 373         TAILQ_INIT(&fibl_head);
 374         while (argc > 1) {
 375                 argc--;
 376                 argv++;
 377                 if (**argv != '-')
 378                         usage(*argv);
 379                 switch (keyword(*argv + 1)) {
 380                 case K_INET:
 381                         af = AF_INET;
 382                         break;
 383 #ifdef INET6
 384                 case K_INET6:
 385                         af = AF_INET6;
 386                         break;
 387 #endif
 388                 case K_ATALK:
 389                         af = AF_APPLETALK;
 390                         break;
 391                 case K_LINK:
 392                         af = AF_LINK;
 393                         break;
 394                 case K_FIB:
 395                         if (!--argc)
 396                                 usage(*argv);
 397                         error = fiboptlist_csv(*++argv, &fibl_head);
 398                         if (error)
 399                                 usage(*argv);
 400                         break;
 401                 default:
 402                         usage(*argv);
 403                 }
 404         }
 405         if (TAILQ_EMPTY(&fibl_head)) {
 406                 error = fiboptlist_csv("default", &fibl_head);
 407                 if (error)
 408                         errx(EX_OSERR, "fiboptlist_csv failed.");
 409         }
 410         TAILQ_FOREACH(fl, &fibl_head, fl_next)
 411                 flushroutes_fib(fl->fl_num);
 412 }
 413
 414 static int
 415 flushroutes_fib(int fib)
 416 {
 417         struct rt_msghdr *rtm;
 418         size_t needed;
 419         char *buf, *next, *lim;
 420         int mib[6], rlen, seqno, count = 0;
 421         int error;
 422
 423         error = set_sofib(fib);
 424         error += set_procfib(fib);
 425         if (error) {
 426                 warn("fib number %d is ignored", fib);
 427                 return (error);
 428         }
 429
 430 retry:
 431         mib[0] = CTL_NET;
 432         mib[1] = PF_ROUTE;
 433         mib[2] = 0;             /* protocol */
 434         mib[3] = 0;             /* wildcard address family */
 435         mib[4] = NET_RT_DUMP;
 436         mib[5] = 0;             /* no flags */
 437         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 438                 err(EX_OSERR, "route-sysctl-estimate");
 439         if ((buf = malloc(needed)) == NULL)
 440                 errx(EX_OSERR, "malloc failed");
 441         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
 442                 if (errno == ENOMEM && count++ < 10) {
 443                         warnx("Routing table grew, retrying");
 444                         sleep(1);
 445                         free(buf);
 446                         goto retry;
 447                 }
 448                 err(EX_OSERR, "route-sysctl-get");
 449         }
 450         lim = buf + needed;
 451         if (verbose)
 452                 (void) printf("Examining routing table from sysctl\n");
 453         seqno = 0;              /* ??? */
 454         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 455                 rtm = (struct rt_msghdr *)next;
 456                 if (verbose)
 457                         print_rtmsg(rtm, rtm->rtm_msglen);
 458                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 459                         continue;
 460                 if (af != 0) {
 461                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 462
 463                         if (sa->sa_family != af)
 464                                 continue;
 465                 }
 466                 if (debugonly)
 467                         continue;
 468                 rtm->rtm_type = RTM_DELETE;
 469                 rtm->rtm_seq = seqno;
 470                 rlen = write(s, next, rtm->rtm_msglen);
 471                 if (rlen < 0 && errno == EPERM)
 472                         err(1, "write to routing socket");
 473                 if (rlen < (int)rtm->rtm_msglen) {
 474                         warn("write to routing socket");
 475                         (void) printf("got only %d for rlen\n", rlen);
 476                         free(buf);
 477                         goto retry;
 478                         break;
 479                 }
 480                 seqno++;
 481                 if (qflag)
 482                         continue;
 483                 if (verbose)
 484                         print_rtmsg(rtm, rlen);
 485                 else {
 486                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 487
 488                         printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 489                             routename(sa) : netname(sa));
 490                         sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
 491                         printf("%-20.20s ", routename(sa));
 492                         if (fib >= 0)
 493                                 printf("-fib %-3d ", fib);
 494                         printf("done\n");
 495                 }
 496         }
 497         return (error);
 498 }
 499
 500 const char *
 501 routename(struct sockaddr *sa)
 502 {
 503         const char *cp;
 504         static char line[MAXHOSTNAMELEN + 1];
 505         struct hostent *hp;
 506         static char domain[MAXHOSTNAMELEN + 1];
 507         static int first = 1, n;
 508
 509         if (first) {
 510                 first = 0;
 511                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 512                     (cp = strchr(domain, '.'))) {
 513                         domain[MAXHOSTNAMELEN] = '\0';
 514                         (void) strcpy(domain, cp + 1);
 515                 } else
 516                         domain[0] = 0;
 517         }
 518
 519         if (sa->sa_len == 0)
 520                 strcpy(line, "default");
 521         else switch (sa->sa_family) {
 522
 523         case AF_INET:
 524             {   struct in_addr in;
 525                 in = ((struct sockaddr_in *)sa)->sin_addr;
 526
 527                 cp = NULL;
 528                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 529                         cp = "default";
 530                 if (cp == NULL && !nflag) {
 531                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 532                                 AF_INET);
 533                         if (hp != NULL) {
 534                                 char *cptr;
 535                                 cptr = strchr(hp->h_name, '.');
 536                                 if (cptr != NULL &&
 537                                     strcmp(cptr + 1, domain) == 0)
 538                                         *cptr = '\0';
 539                                 cp = hp->h_name;
 540                         }
 541                 }
 542                 if (cp != NULL) {
 543                         strncpy(line, cp, sizeof(line) - 1);
 544                         line[sizeof(line) - 1] = '\0';
 545                 } else
 546                         (void) sprintf(line, "%s", inet_ntoa(in));
 547                 break;
 548             }
 549
 550 #ifdef INET6
 551         case AF_INET6:
 552         {
 553                 struct sockaddr_in6 sin6; /* use static var for safety */
 554                 int niflags = 0;
 555
 556                 memset(&sin6, 0, sizeof(sin6));
 557                 memcpy(&sin6, sa, sa->sa_len);
 558                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 559                 sin6.sin6_family = AF_INET6;
 560 #ifdef __KAME__
 561                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 562                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 563                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) ||
 564                      IN6_IS_ADDR_MC_NODELOCAL(&sin6.sin6_addr)) &&
 565                     sin6.sin6_scope_id == 0) {
 566                         sin6.sin6_scope_id =
 567                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 568                         sin6.sin6_addr.s6_addr[2] = 0;
 569                         sin6.sin6_addr.s6_addr[3] = 0;
 570                 }
 571 #endif
 572                 if (nflag)
 573                         niflags |= NI_NUMERICHOST;
 574                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 575                     line, sizeof(line), NULL, 0, niflags) != 0)
 576                         strncpy(line, "invalid", sizeof(line));
 577
 578                 return(line);
 579         }
 580 #endif
 581
 582         case AF_APPLETALK:
 583                 (void) snprintf(line, sizeof(line), "atalk %s",
 584                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 585                 break;
 586
 587         case AF_LINK:
 588                 return (link_ntoa((struct sockaddr_dl *)sa));
 589
 590         default:
 591             {
 592                 u_short *sp = (u_short *)sa;
 593                 u_short *splim = sp + ((sa->sa_len + 1) >> 1);
 594                 char *cps = line + sprintf(line, "(%d)", sa->sa_family);
 595                 char *cpe = line + sizeof(line);
 596
 597                 while (++sp < splim && cps < cpe) /* start with sa->sa_data */
 598                         if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0)
 599                                 cps += n;
 600                         else
 601                                 *cps = '\0';
 602                 break;
 603             }
 604         }
 605         return (line);
 606 }
 607
 608 /*
 609  * Return the name of the network whose address is given.
 610  * The address is assumed to be that of a net or subnet, not a host.
 611  */
 612 const char *
 613 netname(struct sockaddr *sa)
 614 {
 615         const char *cp = NULL;
 616         static char line[MAXHOSTNAMELEN + 1];
 617         struct netent *np = NULL;
 618         u_long net, mask;
 619         u_long i;
 620         int n, subnetshift;
 621
 622         switch (sa->sa_family) {
 623
 624         case AF_INET:
 625             {   struct in_addr in;
 626                 in = ((struct sockaddr_in *)sa)->sin_addr;
 627
 628                 i = in.s_addr = ntohl(in.s_addr);
 629                 if (in.s_addr == 0)
 630                         cp = "default";
 631                 else if (!nflag) {
 632                         if (IN_CLASSA(i)) {
 633                                 mask = IN_CLASSA_NET;
 634                                 subnetshift = 8;
 635                         } else if (IN_CLASSB(i)) {
 636                                 mask = IN_CLASSB_NET;
 637                                 subnetshift = 8;
 638                         } else {
 639                                 mask = IN_CLASSC_NET;
 640                                 subnetshift = 4;
 641                         }
 642                         /*
 643                          * If there are more bits than the standard mask
 644                          * would suggest, subnets must be in use.
 645                          * Guess at the subnet mask, assuming reasonable
 646                          * width subnet fields.
 647                          */
 648                         while (in.s_addr &~ mask)
 649                                 mask = (long)mask >> subnetshift;
 650                         net = in.s_addr & mask;
 651                         while ((mask & 1) == 0)
 652                                 mask >>= 1, net >>= 1;
 653                         np = getnetbyaddr(net, AF_INET);
 654                         if (np != NULL)
 655                                 cp = np->n_name;
 656                 }
 657 #define C(x)    (unsigned)((x) & 0xff)
 658                 if (cp != NULL)
 659                         strncpy(line, cp, sizeof(line));
 660                 else if ((in.s_addr & 0xffffff) == 0)
 661                         (void) sprintf(line, "%u", C(in.s_addr >> 24));
 662                 else if ((in.s_addr & 0xffff) == 0)
 663                         (void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
 664                             C(in.s_addr >> 16));
 665                 else if ((in.s_addr & 0xff) == 0)
 666                         (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 667                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 668                 else
 669                         (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 670                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 671                             C(in.s_addr));
 672 #undef C
 673                 break;
 674             }
 675
 676 #ifdef INET6
 677         case AF_INET6:
 678         {
 679                 struct sockaddr_in6 sin6; /* use static var for safety */
 680                 int niflags = 0;
 681
 682                 memset(&sin6, 0, sizeof(sin6));
 683                 memcpy(&sin6, sa, sa->sa_len);
 684                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 685                 sin6.sin6_family = AF_INET6;
 686 #ifdef __KAME__
 687                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 688                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 689                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) ||
 690                      IN6_IS_ADDR_MC_NODELOCAL(&sin6.sin6_addr)) &&
 691                     sin6.sin6_scope_id == 0) {
 692                         sin6.sin6_scope_id =
 693                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 694                         sin6.sin6_addr.s6_addr[2] = 0;
 695                         sin6.sin6_addr.s6_addr[3] = 0;
 696                 }
 697 #endif
 698                 if (nflag)
 699                         niflags |= NI_NUMERICHOST;
 700                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 701                     line, sizeof(line), NULL, 0, niflags) != 0)
 702                         strncpy(line, "invalid", sizeof(line));
 703
 704                 return(line);
 705         }
 706 #endif
 707
 708         case AF_APPLETALK:
 709                 (void) snprintf(line, sizeof(line), "atalk %s",
 710                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 711                 break;
 712
 713         case AF_LINK:
 714                 return (link_ntoa((struct sockaddr_dl *)sa));
 715
 716
 717         default:
 718             {
 719                 u_short *sp = (u_short *)sa->sa_data;
 720                 u_short *splim = sp + ((sa->sa_len + 1)>>1);
 721                 char *cps = line + sprintf(line, "af %d:", sa->sa_family);
 722                 char *cpe = line + sizeof(line);
 723
 724                 while (sp < splim && cps < cpe)
 725                         if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0)
 726                                 cps += n;
 727                         else
 728                                 *cps = '\0';
 729                 break;
 730             }
 731         }
 732         return (line);
 733 }
 734
 735 static void
 736 set_metric(char *value, int key)
 737 {
 738         int flag = 0;
 739         u_long noval, *valp = &noval;
 740
 741         switch (key) {
 742 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 743         caseof(K_MTU, RTV_MTU, rmx_mtu);
 744         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 745         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 746         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 747         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 748         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 749         caseof(K_RTT, RTV_RTT, rmx_rtt);
 750         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 751         caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight);
 752         }
 753         rtm_inits |= flag;
 754         if (lockrest || locking)
 755                 rt_metrics.rmx_locks |= flag;
 756         if (locking)
 757                 locking = 0;
 758         *valp = atoi(value);
 759 }
 760
 761 #define F_ISHOST        0x01
 762 #define F_FORCENET      0x02
 763 #define F_FORCEHOST     0x04
 764 #define F_PROXY         0x08
 765 #define F_INTERFACE     0x10
 766
 767 static void
 768 newroute(int argc, char **argv)
 769 {
 770         struct hostent *hp;
 771         struct fibl *fl;
 772         char *cmd;
 773         const char *dest, *gateway, *errmsg;
 774         int key, error, flags, nrflags, fibnum;
 775
 776         if (uid != 0) {
 777                 errx(EX_NOPERM, "must be root to alter routing table");
 778         }
 779
 780         dest = NULL;
 781         gateway = NULL;
 782         flags = RTF_STATIC;
 783         nrflags = 0;
 784         hp = NULL;
 785         TAILQ_INIT(&fibl_head);
 786
 787         cmd = argv[0];
 788         if (*cmd != 'g' && *cmd != 's')
 789                 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 790
 791         while (--argc > 0) {
 792                 if (**(++argv)== '-') {
 793                         switch (key = keyword(1 + *argv)) {
 794                         case K_LINK:
 795                                 af = AF_LINK;
 796                                 aflen = sizeof(struct sockaddr_dl);
 797                                 break;
 798                         case K_INET:
 799                                 af = AF_INET;
 800                                 aflen = sizeof(struct sockaddr_in);
 801                                 break;
 802 #ifdef INET6
 803                         case K_INET6:
 804                                 af = AF_INET6;
 805                                 aflen = sizeof(struct sockaddr_in6);
 806                                 break;
 807 #endif
 808                         case K_ATALK:
 809                                 af = AF_APPLETALK;
 810                                 aflen = sizeof(struct sockaddr_at);
 811                                 break;
 812                         case K_SA:
 813                                 af = PF_ROUTE;
 814                                 aflen = sizeof(union sockunion);
 815                                 break;
 816                         case K_IFACE:
 817                         case K_INTERFACE:
 818                                 nrflags |= F_INTERFACE;
 819                                 break;
 820                         case K_NOSTATIC:
 821                                 flags &= ~RTF_STATIC;
 822                                 break;
 823                         case K_LOCK:
 824                                 locking = 1;
 825                                 break;
 826                         case K_LOCKREST:
 827                                 lockrest = 1;
 828                                 break;
 829                         case K_HOST:
 830                                 nrflags |= F_FORCEHOST;
 831                                 break;
 832                         case K_REJECT:
 833                                 flags |= RTF_REJECT;
 834                                 break;
 835                         case K_BLACKHOLE:
 836                                 flags |= RTF_BLACKHOLE;
 837                                 break;
 838                         case K_PROTO1:
 839                                 flags |= RTF_PROTO1;
 840                                 break;
 841                         case K_PROTO2:
 842                                 flags |= RTF_PROTO2;
 843                                 break;
 844                         case K_PROXY:
 845                                 nrflags |= F_PROXY;
 846                                 break;
 847                         case K_XRESOLVE:
 848                                 flags |= RTF_XRESOLVE;
 849                                 break;
 850                         case K_STATIC:
 851                                 flags |= RTF_STATIC;
 852                                 break;
 853                         case K_STICKY:
 854                                 flags |= RTF_STICKY;
 855                                 break;
 856                         case K_NOSTICK:
 857                                 flags &= ~RTF_STICKY;
 858                                 break;
 859                         case K_FIB:
 860                                 if (!--argc)
 861                                         usage(NULL);
 862                                 error = fiboptlist_csv(*++argv, &fibl_head);
 863                                 if (error)
 864                                         usage(NULL);
 865                                 break;
 866                         case K_IFA:
 867                                 if (!--argc)
 868                                         usage(NULL);
 869                                 (void) getaddr(RTA_IFA, *++argv, 0);
 870                                 break;
 871                         case K_IFP:
 872                                 if (!--argc)
 873                                         usage(NULL);
 874                                 (void) getaddr(RTA_IFP, *++argv, 0);
 875                                 break;
 876                         case K_GENMASK:
 877                                 if (!--argc)
 878                                         usage(NULL);
 879                                 (void) getaddr(RTA_GENMASK, *++argv, 0);
 880                                 break;
 881                         case K_GATEWAY:
 882                                 if (!--argc)
 883                                         usage(NULL);
 884                                 (void) getaddr(RTA_GATEWAY, *++argv, 0);
 885                                 break;
 886                         case K_DST:
 887                                 if (!--argc)
 888                                         usage(NULL);
 889                                 if (getaddr(RTA_DST, *++argv, &hp))
 890                                         nrflags |= F_ISHOST;
 891                                 dest = *argv;
 892                                 break;
 893                         case K_NETMASK:
 894                                 if (!--argc)
 895                                         usage(NULL);
 896                                 (void) getaddr(RTA_NETMASK, *++argv, 0);
 897                                 /* FALLTHROUGH */
 898                         case K_NET:
 899                                 nrflags |= F_FORCENET;
 900                                 break;
 901                         case K_PREFIXLEN:
 902                                 if (!--argc)
 903                                         usage(NULL);
 904                                 if (prefixlen(*++argv) == -1) {
 905                                         nrflags &= ~F_FORCENET;
 906                                         nrflags |= F_ISHOST;
 907                                 } else {
 908                                         nrflags |= F_FORCENET;
 909                                         nrflags &= ~F_ISHOST;
 910                                 }
 911                                 break;
 912                         case K_MTU:
 913                         case K_HOPCOUNT:
 914                         case K_EXPIRE:
 915                         case K_RECVPIPE:
 916                         case K_SENDPIPE:
 917                         case K_SSTHRESH:
 918                         case K_RTT:
 919                         case K_RTTVAR:
 920                         case K_WEIGHT:
 921                                 if (!--argc)
 922                                         usage(NULL);
 923                                 set_metric(*++argv, key);
 924                                 break;
 925                         default:
 926                                 usage(1+*argv);
 927                         }
 928                 } else {
 929                         if ((rtm_addrs & RTA_DST) == 0) {
 930                                 dest = *argv;
 931                                 if (getaddr(RTA_DST, *argv, &hp))
 932                                         nrflags |= F_ISHOST;
 933                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 934                                 gateway = *argv;
 935                                 (void) getaddr(RTA_GATEWAY, *argv, &hp);
 936                         } else {
 937                                 (void) getaddr(RTA_NETMASK, *argv, 0);
 938                                 nrflags |= F_FORCENET;
 939                         }
 940                 }
 941         }
 942
 943         if (nrflags & F_FORCEHOST) {
 944                 nrflags |= F_ISHOST;
 945 #ifdef INET6
 946                 if (af == AF_INET6) {
 947                         rtm_addrs &= ~RTA_NETMASK;
 948                         memset((void *)&so_mask, 0, sizeof(so_mask));
 949                 }
 950 #endif
 951         }
 952         if (nrflags & F_FORCENET)
 953                 nrflags &= ~F_ISHOST;
 954         flags |= RTF_UP;
 955         if (nrflags & F_ISHOST)
 956                 flags |= RTF_HOST;
 957         if ((nrflags & F_INTERFACE) == 0)
 958                 flags |= RTF_GATEWAY;
 959         if (nrflags & F_PROXY) {
 960                 so_dst.sinarp.sin_other = SIN_PROXY;
 961                 flags |= RTF_ANNOUNCE;
 962         }
 963         if (dest == NULL)
 964                 dest = "";
 965         if (gateway == NULL)
 966                 gateway = "";
 967
 968         if (TAILQ_EMPTY(&fibl_head)) {
 969                 error = fiboptlist_csv("default", &fibl_head);
 970                 if (error)
 971                         errx(EX_OSERR, "fiboptlist_csv failed.");
 972         }
 973         error = 0;
 974         TAILQ_FOREACH(fl, &fibl_head, fl_next) {
 975                 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags);
 976                 if (fl->fl_error)
 977                         fl->fl_errno = errno;
 978                 error += fl->fl_error;
 979         }
 980         if (*cmd == 'g' || *cmd == 's')
 981                 exit(error);
 982
 983         error = 0;
 984         if (!qflag) {
 985                 fibnum = 0;
 986                 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
 987                         if (fl->fl_error == 0)
 988                                 fibnum++;
 989                 }
 990                 if (fibnum > 0) {
 991                         int firstfib = 1;
 992
 993                         printf("%s %s %s", cmd,
 994                             (nrflags & F_ISHOST) ? "host" : "net", dest);
 995                         if (*gateway)
 996                                 printf(": gateway %s", gateway);
 997
 998                         if (numfibs > 1) {
 999                                 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1000                                         if (fl->fl_error == 0
1001                                             && fl->fl_num >= 0) {
1002                                                 if (firstfib) {
1003                                                         printf(" fib ");
1004                                                         firstfib = 0;
1005                                                 }
1006                                                 printf("%d", fl->fl_num);
1007                                                 if (fibnum-- > 1)
1008                                                         printf(",");
1009                                         }
1010                                 }
1011                         }
1012                         printf("\n");
1013                 }
1014
1015                 fibnum = 0;
1016                 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1017                         if (fl->fl_error != 0) {
1018                                 printf("%s %s %s", cmd, (nrflags & F_ISHOST)
1019                                     ? "host" : "net", dest);
1020                                 if (*gateway)
1021                                         printf(": gateway %s", gateway);
1022
1023                                 if (fl->fl_num >= 0)
1024                                         printf(" fib %d", fl->fl_num);
1025
1026                                 switch (fl->fl_errno) {
1027                                 case ESRCH:
1028                                         errmsg = "not in table";
1029                                         break;
1030                                 case EBUSY:
1031                                         errmsg = "entry in use";
1032                                         break;
1033                                 case ENOBUFS:
1034                                         errmsg = "not enough memory";
1035                                         break;
1036                                 case EADDRINUSE:
1037                                         /*
1038                                          * handle recursion avoidance
1039                                          * in rt_setgate()
1040                                          */
1041                                         errmsg = "gateway uses the same route";
1042                                         break;
1043                                 case EEXIST:
1044                                         errmsg = "route already in table";
1045                                         break;
1046                                 default:
1047                                         errmsg = strerror(fl->fl_errno);
1048                                         break;
1049                                 }
1050                                 printf(": %s\n", errmsg);
1051                                 error = 1;
1052                         }
1053                 }
1054         }
1055         exit(error);
1056 }
1057
1058 static int
1059 newroute_fib(int fib, char *cmd, int flags)
1060 {
1061         int error;
1062
1063         error = set_sofib(fib);
1064         if (error) {
1065                 warn("fib number %d is ignored", fib);
1066                 return (error);
1067         }
1068
1069         error = rtmsg(*cmd, flags, fib);
1070         return (error);
1071 }
1072
1073 static void
1074 inet_makenetandmask(u_long net, struct sockaddr_in *sin, u_long bits)
1075 {
1076         u_long addr, mask = 0;
1077         char *cp;
1078
1079         rtm_addrs |= RTA_NETMASK;
1080         /*
1081          * XXX: This approach unable to handle 0.0.0.1/32 correctly
1082          * as inet_network() converts 0.0.0.1 and 1 equally.
1083          */
1084         if (net <= 0xff)
1085                 addr = net << IN_CLASSA_NSHIFT;
1086         else if (net <= 0xffff)
1087                 addr = net << IN_CLASSB_NSHIFT;
1088         else if (net <= 0xffffff)
1089                 addr = net << IN_CLASSC_NSHIFT;
1090         else
1091                 addr = net;
1092         /*
1093          * If no /xx was specified we must calculate the
1094          * CIDR address.
1095          */
1096         if ((bits == 0)  && (addr != 0)) {
1097                 u_long i, j;
1098                 for(i=0,j=0xff; i<4; i++)  {
1099                         if (addr & j) {
1100                                 break;
1101                         }
1102                         j <<= 8;
1103                 }
1104                 /* i holds the first non zero bit */
1105                 bits = 32 - (i*8);
1106         }
1107         if (bits != 0)
1108                 mask = 0xffffffff << (32 - bits);
1109
1110         sin->sin_addr.s_addr = htonl(addr);
1111         sin = &so_mask.sin;
1112         sin->sin_addr.s_addr = htonl(mask);
1113         sin->sin_len = 0;
1114         sin->sin_family = 0;
1115         cp = (char *)(&sin->sin_addr + 1);
1116         while (*--cp == 0 && cp > (char *)sin)
1117                 ;
1118         sin->sin_len = 1 + cp - (char *)sin;
1119 }
1120
1121 #ifdef INET6
1122 /*
1123  * XXX the function may need more improvement...
1124  */
1125 static int
1126 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
1127 {
1128         struct in6_addr in6;
1129
1130         if (plen == NULL) {
1131                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
1132                     sin6->sin6_scope_id == 0) {
1133                         plen = "0";
1134                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
1135                         /* aggregatable global unicast - RFC2374 */
1136                         memset(&in6, 0, sizeof(in6));
1137                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
1138                                     &in6.s6_addr[8], 8))
1139                                 plen = "64";
1140                 }
1141         }
1142
1143         if (plen == NULL || strcmp(plen, "128") == 0)
1144                 return (1);
1145         rtm_addrs |= RTA_NETMASK;
1146         prefixlen(plen);
1147         return (0);
1148 }
1149 #endif
1150
1151 /*
1152  * Interpret an argument as a network address of some kind,
1153  * returning 1 if a host address, 0 if a network address.
1154  */
1155 static int
1156 getaddr(int which, char *str, struct hostent **hpp)
1157 {
1158         sup su;
1159         struct hostent *hp;
1160         struct netent *np;
1161         u_long val;
1162         char *q;
1163         int afamily;  /* local copy of af so we can change it */
1164
1165         if (af == 0) {
1166                 af = AF_INET;
1167                 aflen = sizeof(struct sockaddr_in);
1168         }
1169         afamily = af;
1170         rtm_addrs |= which;
1171         switch (which) {
1172         case RTA_DST:
1173                 su = &so_dst;
1174                 break;
1175         case RTA_GATEWAY:
1176                 su = &so_gate;
1177                 if (iflag) {
1178                         struct ifaddrs *ifap, *ifa;
1179                         struct sockaddr_dl *sdl = NULL;
1180
1181                         if (getifaddrs(&ifap))
1182                                 err(1, "getifaddrs");
1183
1184                         for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
1185                                 if (ifa->ifa_addr->sa_family != AF_LINK)
1186                                         continue;
1187
1188                                 if (strcmp(str, ifa->ifa_name) != 0)
1189                                         continue;
1190
1191                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1192                         }
1193                         /* If we found it, then use it */
1194                         if (sdl != NULL) {
1195                                 /*
1196                                  * Copy is safe since we have a
1197                                  * sockaddr_storage member in sockunion{}.
1198                                  * Note that we need to copy before calling
1199                                  * freeifaddrs().
1200                                  */
1201                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
1202                         }
1203                         freeifaddrs(ifap);
1204                         if (sdl != NULL)
1205                                 return(1);
1206                 }
1207                 break;
1208         case RTA_NETMASK:
1209                 su = &so_mask;
1210                 break;
1211         case RTA_GENMASK:
1212                 su = &so_genmask;
1213                 break;
1214         case RTA_IFP:
1215                 su = &so_ifp;
1216                 afamily = AF_LINK;
1217                 break;
1218         case RTA_IFA:
1219                 su = &so_ifa;
1220                 break;
1221         default:
1222                 usage("internal error");
1223                 /*NOTREACHED*/
1224         }
1225         su->sa.sa_len = aflen;
1226         su->sa.sa_family = afamily; /* cases that don't want it have left already */
1227         if (strcmp(str, "default") == 0) {
1228                 /*
1229                  * Default is net 0.0.0.0/0
1230                  */
1231                 switch (which) {
1232                 case RTA_DST:
1233                         forcenet++;
1234 #if 0
1235                         bzero(su, sizeof(*su)); /* for readability */
1236 #endif
1237                         getaddr(RTA_NETMASK, str, 0);
1238                         break;
1239 #if 0
1240                 case RTA_NETMASK:
1241                 case RTA_GENMASK:
1242                         bzero(su, sizeof(*su)); /* for readability */
1243 #endif
1244                 }
1245                 return (0);
1246         }
1247         switch (afamily) {
1248 #ifdef INET6
1249         case AF_INET6:
1250         {
1251                 struct addrinfo hints, *res;
1252                 int ecode;
1253
1254                 q = NULL;
1255                 if (which == RTA_DST && (q = strchr(str, '/')) != NULL)
1256                         *q = '\0';
1257                 memset(&hints, 0, sizeof(hints));
1258                 hints.ai_family = afamily;      /*AF_INET6*/
1259                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
1260                 ecode = getaddrinfo(str, NULL, &hints, &res);
1261                 if (ecode != 0 || res->ai_family != AF_INET6 ||
1262                     res->ai_addrlen != sizeof(su->sin6)) {
1263                         (void) fprintf(stderr, "%s: %s\n", str,
1264                             gai_strerror(ecode));
1265                         exit(1);
1266                 }
1267                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
1268 #ifdef __KAME__
1269                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
1270                      IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr) ||
1271                      IN6_IS_ADDR_MC_NODELOCAL(&su->sin6.sin6_addr)) &&
1272                     su->sin6.sin6_scope_id) {
1273                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1274                                 htons(su->sin6.sin6_scope_id);
1275                         su->sin6.sin6_scope_id = 0;
1276                 }
1277 #endif
1278                 freeaddrinfo(res);
1279                 if (q != NULL)
1280                         *q++ = '/';
1281                 if (which == RTA_DST)
1282                         return (inet6_makenetandmask(&su->sin6, q));
1283                 return (0);
1284         }
1285 #endif /* INET6 */
1286
1287         case AF_APPLETALK:
1288                 if (!atalk_aton(str, &su->sat.sat_addr))
1289                         errx(EX_NOHOST, "bad address: %s", str);
1290                 rtm_addrs |= RTA_NETMASK;
1291                 return(forcehost || su->sat.sat_addr.s_node != 0);
1292
1293         case AF_LINK:
1294                 link_addr(str, &su->sdl);
1295                 return (1);
1296
1297
1298         case PF_ROUTE:
1299                 su->sa.sa_len = sizeof(*su);
1300                 sockaddr(str, &su->sa);
1301                 return (1);
1302
1303         case AF_INET:
1304         default:
1305                 break;
1306         }
1307
1308         if (hpp == NULL)
1309                 hpp = &hp;
1310         *hpp = NULL;
1311
1312         q = strchr(str,'/');
1313         if (q != NULL && which == RTA_DST) {
1314                 *q = '\0';
1315                 if ((val = inet_network(str)) != INADDR_NONE) {
1316                         inet_makenetandmask(
1317                                 val, &su->sin, strtoul(q+1, 0, 0));
1318                         return (0);
1319                 }
1320                 *q = '/';
1321         }
1322         if ((which != RTA_DST || forcenet == 0) &&
1323             inet_aton(str, &su->sin.sin_addr)) {
1324                 val = su->sin.sin_addr.s_addr;
1325                 if (which != RTA_DST || forcehost ||
1326                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1327                         return (1);
1328                 else {
1329                         val = ntohl(val);
1330                         goto netdone;
1331                 }
1332         }
1333         if (which == RTA_DST && forcehost == 0 &&
1334             ((val = inet_network(str)) != INADDR_NONE ||
1335             ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) {
1336 netdone:
1337                 inet_makenetandmask(val, &su->sin, 0);
1338                 return (0);
1339         }
1340         hp = gethostbyname(str);
1341         if (hp != NULL) {
1342                 *hpp = hp;
1343                 su->sin.sin_family = hp->h_addrtype;
1344                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1345                     MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr)));
1346                 return (1);
1347         }
1348         errx(EX_NOHOST, "bad address: %s", str);
1349 }
1350
1351 static int
1352 prefixlen(const char *str)
1353 {
1354         int len = atoi(str), q, r;
1355         int max;
1356         char *p;
1357
1358         rtm_addrs |= RTA_NETMASK;
1359         switch (af) {
1360 #ifdef INET6
1361         case AF_INET6:
1362                 max = 128;
1363                 p = (char *)&so_mask.sin6.sin6_addr;
1364                 break;
1365 #endif
1366         case AF_INET:
1367                 max = 32;
1368                 p = (char *)&so_mask.sin.sin_addr;
1369                 break;
1370         default:
1371                 fprintf(stderr, "prefixlen not supported in this af\n");
1372                 exit(1);
1373         }
1374
1375         if (len < 0 || max < len) {
1376                 fprintf(stderr, "%s: bad value\n", str);
1377                 exit(1);
1378         }
1379
1380         q = len >> 3;
1381         r = len & 7;
1382         so_mask.sa.sa_family = af;
1383         so_mask.sa.sa_len = aflen;
1384         memset((void *)p, 0, max / 8);
1385         if (q > 0)
1386                 memset((void *)p, 0xff, q);
1387         if (r > 0)
1388                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1389         if (len == max)
1390                 return (-1);
1391         else
1392                 return (len);
1393 }
1394
1395 static void
1396 interfaces(void)
1397 {
1398         size_t needed;
1399         int mib[6];
1400         char *buf, *lim, *next, count = 0;
1401         struct rt_msghdr *rtm;
1402
1403 retry2:
1404         mib[0] = CTL_NET;
1405         mib[1] = PF_ROUTE;
1406         mib[2] = 0;             /* protocol */
1407         mib[3] = 0;             /* wildcard address family */
1408         mib[4] = NET_RT_IFLIST;
1409         mib[5] = 0;             /* no flags */
1410         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1411                 err(EX_OSERR, "route-sysctl-estimate");
1412         if ((buf = malloc(needed)) == NULL)
1413                 errx(EX_OSERR, "malloc failed");
1414         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
1415                 if (errno == ENOMEM && count++ < 10) {
1416                         warnx("Routing table grew, retrying");
1417                         sleep(1);
1418                         free(buf);
1419                         goto retry2;
1420                 }
1421                 err(EX_OSERR, "actual retrieval of interface table");
1422         }
1423         lim = buf + needed;
1424         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1425                 rtm = (struct rt_msghdr *)next;
1426                 print_rtmsg(rtm, rtm->rtm_msglen);
1427         }
1428 }
1429
1430 static void
1431 monitor(int argc, char *argv[])
1432 {
1433         int n, fib, error;
1434         char msg[2048], *endptr;
1435
1436         fib = defaultfib;
1437         while (argc > 1) {
1438                 argc--;
1439                 argv++;
1440                 if (**argv != '-')
1441                         usage(*argv);
1442                 switch (keyword(*argv + 1)) {
1443                 case K_FIB:
1444                         if (!--argc)
1445                                 usage(*argv);
1446                         fib = strtol(*++argv, &endptr, 0);
1447                         if (*endptr != '\0' || (fib == 0 &&
1448                             (errno == EINVAL || errno == ERANGE)))
1449                                 usage(*argv);
1450                         break;
1451                 default:
1452                         usage(*argv);
1453                 }
1454         }
1455         error = set_sofib(fib);
1456         if (error)
1457                 errx(EX_USAGE, "invalid fib number: %d", fib);
1458
1459         verbose = 1;
1460         if (debugonly) {
1461                 interfaces();
1462                 exit(0);
1463         }
1464         for (;;) {
1465                 time_t now;
1466                 n = read(s, msg, 2048);
1467                 now = time(NULL);
1468                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1469                 print_rtmsg((struct rt_msghdr *)msg, n);
1470         }
1471 }
1472
1473 struct {
1474         struct  rt_msghdr m_rtm;
1475         char    m_space[512];
1476 } m_rtmsg;
1477
1478 static int
1479 rtmsg(int cmd, int flags, int fib)
1480 {
1481         static int seq;
1482         int rlen;
1483         char *cp = m_rtmsg.m_space;
1484         int l;
1485
1486 #define NEXTADDR(w, u) \
1487         if (rtm_addrs & (w)) {\
1488             l = SA_SIZE(&(u.sa)); memmove(cp, &(u), l); cp += l;\
1489             if (verbose) sodump(&(u),#u);\
1490         }
1491
1492         errno = 0;
1493         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1494         if (cmd == 'a')
1495                 cmd = RTM_ADD;
1496         else if (cmd == 'c')
1497                 cmd = RTM_CHANGE;
1498         else if (cmd == 'g' || cmd == 's') {
1499                 cmd = RTM_GET;
1500                 if (so_ifp.sa.sa_family == 0) {
1501                         so_ifp.sa.sa_family = AF_LINK;
1502                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1503                         rtm_addrs |= RTA_IFP;
1504                 }
1505         } else
1506                 cmd = RTM_DELETE;
1507 #define rtm m_rtmsg.m_rtm
1508         rtm.rtm_type = cmd;
1509         rtm.rtm_flags = flags;
1510         rtm.rtm_version = RTM_VERSION;
1511         rtm.rtm_seq = ++seq;
1512         rtm.rtm_addrs = rtm_addrs;
1513         rtm.rtm_rmx = rt_metrics;
1514         rtm.rtm_inits = rtm_inits;
1515
1516         if (rtm_addrs & RTA_NETMASK)
1517                 mask_addr();
1518         NEXTADDR(RTA_DST, so_dst);
1519         NEXTADDR(RTA_GATEWAY, so_gate);
1520         NEXTADDR(RTA_NETMASK, so_mask);
1521         NEXTADDR(RTA_GENMASK, so_genmask);
1522         NEXTADDR(RTA_IFP, so_ifp);
1523         NEXTADDR(RTA_IFA, so_ifa);
1524         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1525         if (verbose)
1526                 print_rtmsg(&rtm, l);
1527         if (debugonly)
1528                 return (0);
1529         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1530                 if (errno == EPERM)
1531                         err(1, "writing to routing socket");
1532                 warn("writing to routing socket");
1533                 return (-1);
1534         }
1535         if (cmd == RTM_GET) {
1536                 do {
1537                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1538                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1539                 if (l < 0)
1540                         warn("read from routing socket");
1541                 else
1542                         print_getmsg(&rtm, l, fib);
1543         }
1544 #undef rtm
1545         return (0);
1546 }
1547
1548 static void
1549 mask_addr(void)
1550 {
1551         int olen = so_mask.sa.sa_len;
1552         char *cp1 = olen + (char *)&so_mask, *cp2;
1553
1554         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1555                 if (*--cp1 != 0) {
1556                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1557                         break;
1558                 }
1559         if ((rtm_addrs & RTA_DST) == 0)
1560                 return;
1561         switch (so_dst.sa.sa_family) {
1562         case AF_INET:
1563 #ifdef INET6
1564         case AF_INET6:
1565 #endif
1566         case AF_APPLETALK:
1567         case 0:
1568                 return;
1569         }
1570         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1571         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1572         while (cp2 > cp1)
1573                 *--cp2 = 0;
1574         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1575         while (cp1 > so_dst.sa.sa_data)
1576                 *--cp1 &= *--cp2;
1577 }
1578
1579 const char *msgtypes[] = {
1580         "",
1581         "RTM_ADD: Add Route",
1582         "RTM_DELETE: Delete Route",
1583         "RTM_CHANGE: Change Metrics or flags",
1584         "RTM_GET: Report Metrics",
1585         "RTM_LOSING: Kernel Suspects Partitioning",
1586         "RTM_REDIRECT: Told to use different route",
1587         "RTM_MISS: Lookup failed on this address",
1588         "RTM_LOCK: fix specified metrics",
1589         "RTM_OLDADD: caused by SIOCADDRT",
1590         "RTM_OLDDEL: caused by SIOCDELRT",
1591         "RTM_RESOLVE: Route created by cloning",
1592         "RTM_NEWADDR: address being added to iface",
1593         "RTM_DELADDR: address being removed from iface",
1594         "RTM_IFINFO: iface status change",
1595         "RTM_NEWMADDR: new multicast group membership on iface",
1596         "RTM_DELMADDR: multicast group membership removed from iface",
1597         "RTM_IFANNOUNCE: interface arrival/departure",
1598         "RTM_IEEE80211: IEEE 802.11 wireless event",
1599 };
1600
1601 char metricnames[] =
1602 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire"
1603 "\1mtu";
1604 char routeflags[] =
1605 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE"
1606 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE"
1607 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3"
1608 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY";
1609 char ifnetflags[] =
1610 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1611 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1612 "\017LINK2\020MULTICAST";
1613 char addrnames[] =
1614 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1615
1616 static const char errfmt[] =
1617 "\n%s: truncated route message, only %zu bytes left\n";
1618
1619 static void
1620 print_rtmsg(struct rt_msghdr *rtm, size_t msglen)
1621 {
1622         struct if_msghdr *ifm;
1623         struct ifa_msghdr *ifam;
1624 #ifdef RTM_NEWMADDR
1625         struct ifma_msghdr *ifmam;
1626 #endif
1627         struct if_announcemsghdr *ifan;
1628         const char *state;
1629
1630         if (verbose == 0)
1631                 return;
1632         if (rtm->rtm_version != RTM_VERSION) {
1633                 (void) printf("routing message version %d not understood\n",
1634                     rtm->rtm_version);
1635                 return;
1636         }
1637         if (rtm->rtm_type < sizeof(msgtypes) / sizeof(msgtypes[0]))
1638                 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1639         else
1640                 (void)printf("unknown type %d: ", rtm->rtm_type);
1641         (void)printf("len %d, ", rtm->rtm_msglen);
1642
1643 #define REQUIRE(x)      do {            \
1644         if (msglen < sizeof(x))         \
1645                 goto badlen;            \
1646         else                            \
1647                 msglen -= sizeof(x);    \
1648         } while (0)
1649
1650         switch (rtm->rtm_type) {
1651         case RTM_IFINFO:
1652                 REQUIRE(struct if_msghdr);
1653                 ifm = (struct if_msghdr *)rtm;
1654                 (void) printf("if# %d, ", ifm->ifm_index);
1655                 switch (ifm->ifm_data.ifi_link_state) {
1656                 case LINK_STATE_DOWN:
1657                         state = "down";
1658                         break;
1659                 case LINK_STATE_UP:
1660                         state = "up";
1661                         break;
1662                 default:
1663                         state = "unknown";
1664                         break;
1665                 }
1666                 (void) printf("link: %s, flags:", state);
1667                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1668                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen);
1669                 break;
1670         case RTM_NEWADDR:
1671         case RTM_DELADDR:
1672                 REQUIRE(struct ifa_msghdr);
1673                 ifam = (struct ifa_msghdr *)rtm;
1674                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1675                 bprintf(stdout, ifam->ifam_flags, routeflags);
1676                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen);
1677                 break;
1678 #ifdef RTM_NEWMADDR
1679         case RTM_NEWMADDR:
1680         case RTM_DELMADDR:
1681                 REQUIRE(struct ifma_msghdr);
1682                 ifmam = (struct ifma_msghdr *)rtm;
1683                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen);
1684                 break;
1685 #endif
1686         case RTM_IFANNOUNCE:
1687                 REQUIRE(struct if_announcemsghdr);
1688                 ifan = (struct if_announcemsghdr *)rtm;
1689                 (void) printf("if# %d, what: ", ifan->ifan_index);
1690                 switch (ifan->ifan_what) {
1691                 case IFAN_ARRIVAL:
1692                         printf("arrival");
1693                         break;
1694                 case IFAN_DEPARTURE:
1695                         printf("departure");
1696                         break;
1697                 default:
1698                         printf("#%d", ifan->ifan_what);
1699                         break;
1700                 }
1701                 printf("\n");
1702                 fflush(stdout);
1703                 break;
1704
1705         default:
1706                 (void) printf("pid: %ld, seq %d, errno %d, flags:",
1707                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1708                 bprintf(stdout, rtm->rtm_flags, routeflags);
1709                 pmsg_common(rtm, msglen);
1710         }
1711
1712         return;
1713
1714 badlen:
1715         (void)printf(errfmt, __func__, msglen);
1716 #undef  REQUIRE
1717 }
1718
1719 static void
1720 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib)
1721 {
1722         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1723         struct sockaddr_dl *ifp = NULL;
1724         struct sockaddr *sa;
1725         char *cp;
1726         int i;
1727
1728         (void) printf("   route to: %s\n",
1729             routename((struct sockaddr *)&so_dst));
1730         if (rtm->rtm_version != RTM_VERSION) {
1731                 warnx("routing message version %d not understood",
1732                      rtm->rtm_version);
1733                 return;
1734         }
1735         if (rtm->rtm_msglen > msglen) {
1736                 warnx("message length mismatch, in packet %d, returned %d",
1737                       rtm->rtm_msglen, msglen);
1738         }
1739         if (rtm->rtm_errno)  {
1740                 errno = rtm->rtm_errno;
1741                 warn("message indicates error %d", errno);
1742                 return;
1743         }
1744         cp = ((char *)(rtm + 1));
1745         if (rtm->rtm_addrs)
1746                 for (i = 1; i; i <<= 1)
1747                         if (i & rtm->rtm_addrs) {
1748                                 sa = (struct sockaddr *)cp;
1749                                 switch (i) {
1750                                 case RTA_DST:
1751                                         dst = sa;
1752                                         break;
1753                                 case RTA_GATEWAY:
1754                                         gate = sa;
1755                                         break;
1756                                 case RTA_NETMASK:
1757                                         mask = sa;
1758                                         break;
1759                                 case RTA_IFP:
1760                                         if (sa->sa_family == AF_LINK &&
1761                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1762                                                 ifp = (struct sockaddr_dl *)sa;
1763                                         break;
1764                                 }
1765                                 cp += SA_SIZE(sa);
1766                         }
1767         if (dst && mask)
1768                 mask->sa_family = dst->sa_family;       /* XXX */
1769         if (dst)
1770                 (void)printf("destination: %s\n", routename(dst));
1771         if (mask) {
1772                 int savenflag = nflag;
1773
1774                 nflag = 1;
1775                 (void)printf("       mask: %s\n", routename(mask));
1776                 nflag = savenflag;
1777         }
1778         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1779                 (void)printf("    gateway: %s\n", routename(gate));
1780         if (fib >= 0)
1781                 (void)printf("        fib: %u\n", (unsigned int)fib);
1782         if (ifp)
1783                 (void)printf("  interface: %.*s\n",
1784                     ifp->sdl_nlen, ifp->sdl_data);
1785         (void)printf("      flags: ");
1786         bprintf(stdout, rtm->rtm_flags, routeflags);
1787
1788 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1789 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1790
1791         (void) printf("\n%s\n", "\
1792  recvpipe  sendpipe  ssthresh  rtt,msec    mtu        weight    expire");
1793         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1794         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1795         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1796         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1797         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1798         printf("%8ld%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT));
1799         if (rtm->rtm_rmx.rmx_expire)
1800                 rtm->rtm_rmx.rmx_expire -= time(0);
1801         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1802 #undef lock
1803 #undef msec
1804 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1805         if (verbose)
1806                 pmsg_common(rtm, msglen);
1807         else if (rtm->rtm_addrs &~ RTA_IGN) {
1808                 (void) printf("sockaddrs: ");
1809                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1810                 putchar('\n');
1811         }
1812 #undef  RTA_IGN
1813 }
1814
1815 static void
1816 pmsg_common(struct rt_msghdr *rtm, size_t msglen)
1817 {
1818         (void) printf("\nlocks: ");
1819         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1820         (void) printf(" inits: ");
1821         bprintf(stdout, rtm->rtm_inits, metricnames);
1822         if (msglen > sizeof(struct rt_msghdr))
1823                 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs,
1824                     msglen - sizeof(struct rt_msghdr));
1825         else
1826                 (void) fflush(stdout);
1827 }
1828
1829 static void
1830 pmsg_addrs(char *cp, int addrs, size_t len)
1831 {
1832         struct sockaddr *sa;
1833         int i;
1834
1835         if (addrs == 0) {
1836                 (void) putchar('\n');
1837                 return;
1838         }
1839         (void) printf("\nsockaddrs: ");
1840         bprintf(stdout, addrs, addrnames);
1841         (void) putchar('\n');
1842         for (i = 1; i != 0; i <<= 1)
1843                 if (i & addrs) {
1844                         sa = (struct sockaddr *)cp;
1845                         if (len == 0 || len < SA_SIZE(sa)) {
1846                                 (void) printf(errfmt, __func__, len);
1847                                 break;
1848                         }
1849                         (void) printf(" %s", routename(sa));
1850                         len -= SA_SIZE(sa);
1851                         cp += SA_SIZE(sa);
1852                 }
1853         (void) putchar('\n');
1854         (void) fflush(stdout);
1855 }
1856
1857 static void
1858 bprintf(FILE *fp, int b, u_char *str)
1859 {
1860         int i;
1861         int gotsome = 0;
1862
1863         if (b == 0)
1864                 return;
1865         while ((i = *str++) != 0) {
1866                 if (b & (1 << (i-1))) {
1867                         if (gotsome == 0)
1868                                 i = '<';
1869                         else
1870                                 i = ',';
1871                         (void) putc(i, fp);
1872                         gotsome = 1;
1873                         for (; (i = *str) > 32; str++)
1874                                 (void) putc(i, fp);
1875                 } else
1876                         while (*str > 32)
1877                                 str++;
1878         }
1879         if (gotsome)
1880                 (void) putc('>', fp);
1881 }
1882
1883 int
1884 keyword(const char *cp)
1885 {
1886         struct keytab *kt = keywords;
1887
1888         while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
1889                 kt++;
1890         return (kt->kt_i);
1891 }
1892
1893 static void
1894 sodump(sup su, const char *which)
1895 {
1896         switch (su->sa.sa_family) {
1897         case AF_LINK:
1898                 (void) printf("%s: link %s; ",
1899                     which, link_ntoa(&su->sdl));
1900                 break;
1901         case AF_INET:
1902                 (void) printf("%s: inet %s; ",
1903                     which, inet_ntoa(su->sin.sin_addr));
1904                 break;
1905         case AF_APPLETALK:
1906                 (void) printf("%s: atalk %s; ",
1907                     which, atalk_ntoa(su->sat.sat_addr));
1908                 break;
1909         }
1910         (void) fflush(stdout);
1911 }
1912
1913 /* States*/
1914 #define VIRGIN  0
1915 #define GOTONE  1
1916 #define GOTTWO  2
1917 /* Inputs */
1918 #define DIGIT   (4*0)
1919 #define END     (4*1)
1920 #define DELIM   (4*2)
1921
1922 static void
1923 sockaddr(char *addr, struct sockaddr *sa)
1924 {
1925         char *cp = (char *)sa;
1926         int size = sa->sa_len;
1927         char *cplim = cp + size;
1928         int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1929
1930         memset(cp, 0, size);
1931         cp++;
1932         do {
1933                 if ((*addr >= '0') && (*addr <= '9')) {
1934                         new = *addr - '0';
1935                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1936                         new = *addr - 'a' + 10;
1937                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1938                         new = *addr - 'A' + 10;
1939                 } else if (*addr == '\0')
1940                         state |= END;
1941                 else
1942                         state |= DELIM;
1943                 addr++;
1944                 switch (state /* | INPUT */) {
1945                 case GOTTWO | DIGIT:
1946                         *cp++ = byte; /*FALLTHROUGH*/
1947                 case VIRGIN | DIGIT:
1948                         state = GOTONE; byte = new; continue;
1949                 case GOTONE | DIGIT:
1950                         state = GOTTWO; byte = new + (byte << 4); continue;
1951                 default: /* | DELIM */
1952                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1953                 case GOTONE | END:
1954                 case GOTTWO | END:
1955                         *cp++ = byte; /* FALLTHROUGH */
1956                 case VIRGIN | END:
1957                         break;
1958                 }
1959                 break;
1960         } while (cp < cplim);
1961         sa->sa_len = cp - (char *)sa;
1962 }
1963
1964 static int
1965 atalk_aton(const char *text, struct at_addr *addr)
1966 {
1967         u_int net, node;
1968
1969         if (sscanf(text, "%u.%u", &net, &node) != 2
1970             || net > 0xffff || node > 0xff)
1971                 return(0);
1972         addr->s_net = htons(net);
1973         addr->s_node = node;
1974         return(1);
1975 }
1976
1977 static char *
1978 atalk_ntoa(struct at_addr at)
1979 {
1980         static char buf[20];
1981
1982         (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
1983         return(buf);
1984 }