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     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 **, int);
 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 *str0, *str, *token, *endptr;
 264         int fib[2], i, error;
 265
 266         str0 = 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                         errno = 0;
 274                         fib[i] = strtol(token, &endptr, 0);
 275                         if (errno == 0) {
 276                                 if (*endptr != '\0' ||
 277                                     fib[i] < 0 ||
 278                                     (numfibs != -1 && fib[i] > numfibs - 1))
 279                                         errno = EINVAL;
 280                         }
 281                         if (errno)
 282                                 error = 1;
 283                         break;
 284                 default:
 285                         error = 1;
 286                 }
 287                 if (error)
 288                         goto fiboptlist_range_ret;
 289                 i++;
 290         }
 291         if (fib[0] >= fib[1]) {
 292                 error = 1;
 293                 goto fiboptlist_range_ret;
 294         }
 295         for (i = fib[0]; i <= fib[1]; i++) {
 296                 fl = calloc(1, sizeof(*fl));
 297                 if (fl == NULL) {
 298                         error = 1;
 299                         goto fiboptlist_range_ret;
 300                 }
 301                 fl->fl_num = i;
 302                 TAILQ_INSERT_TAIL(flh, fl, fl_next);
 303         }
 304 fiboptlist_range_ret:
 305         free(str0);
 306         return (error);
 307 }
 308
 309 #define ALLSTRLEN       64
 310 static int
 311 fiboptlist_csv(const char *arg, struct fibl_head_t *flh)
 312 {
 313         struct fibl *fl;
 314         char *str0, *str, *token, *endptr;
 315         int fib, error;
 316
 317         if (strcmp("all", arg) == 0) {
 318                 str = calloc(1, ALLSTRLEN);
 319                 if (str == NULL) {
 320                         error = 1;
 321                         goto fiboptlist_csv_ret;
 322                 }
 323                 if (numfibs > 1)
 324                         snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1);
 325                 else
 326                         snprintf(str, ALLSTRLEN - 1, "%d", 0);
 327         } else if (strcmp("default", arg) == 0) {
 328                 str0 = str = calloc(1, ALLSTRLEN);
 329                 if (str == NULL) {
 330                         error = 1;
 331                         goto fiboptlist_csv_ret;
 332                 }
 333                 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib);
 334         } else
 335                 str0 = str = strdup(arg);
 336
 337         error = 0;
 338         while ((token = strsep(&str, ",")) != NULL) {
 339                 if (*token != '-' && strchr(token, '-') != NULL) {
 340                         error = fiboptlist_range(token, flh);
 341                         if (error)
 342                                 goto fiboptlist_csv_ret;
 343                 } else {
 344                         errno = 0;
 345                         fib = strtol(token, &endptr, 0);
 346                         if (errno == 0) {
 347                                 if (*endptr != '\0' ||
 348                                     fib < 0 ||
 349                                     (numfibs != -1 && fib > numfibs - 1))
 350                                         errno = EINVAL;
 351                         }
 352                         if (errno) {
 353                                 error = 1;
 354                                 goto fiboptlist_csv_ret;
 355                         }
 356                         fl = calloc(1, sizeof(*fl));
 357                         if (fl == NULL) {
 358                                 error = 1;
 359                                 goto fiboptlist_csv_ret;
 360                         }
 361                         fl->fl_num = fib;
 362                         TAILQ_INSERT_TAIL(flh, fl, fl_next);
 363                 }
 364         }
 365 fiboptlist_csv_ret:
 366         free(str0);
 367         return (error);
 368 }
 369
 370 /*
 371  * Purge all entries in the routing tables not
 372  * associated with network interfaces.
 373  */
 374 static void
 375 flushroutes(int argc, char *argv[])
 376 {
 377         struct fibl *fl;
 378         int error;
 379
 380         if (uid != 0 && !debugonly) {
 381                 errx(EX_NOPERM, "must be root to alter routing table");
 382         }
 383         shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 384
 385         TAILQ_INIT(&fibl_head);
 386         while (argc > 1) {
 387                 argc--;
 388                 argv++;
 389                 if (**argv != '-')
 390                         usage(*argv);
 391                 switch (keyword(*argv + 1)) {
 392                 case K_INET:
 393                         af = AF_INET;
 394                         break;
 395 #ifdef INET6
 396                 case K_INET6:
 397                         af = AF_INET6;
 398                         break;
 399 #endif
 400                 case K_ATALK:
 401                         af = AF_APPLETALK;
 402                         break;
 403                 case K_LINK:
 404                         af = AF_LINK;
 405                         break;
 406                 case K_FIB:
 407                         if (!--argc)
 408                                 usage(*argv);
 409                         error = fiboptlist_csv(*++argv, &fibl_head);
 410                         if (error)
 411                                 errx(EX_USAGE, "invalid fib number: %s", *argv);
 412                         break;
 413                 default:
 414                         usage(*argv);
 415                 }
 416         }
 417         if (TAILQ_EMPTY(&fibl_head)) {
 418                 error = fiboptlist_csv("default", &fibl_head);
 419                 if (error)
 420                         errx(EX_OSERR, "fiboptlist_csv failed.");
 421         }
 422         TAILQ_FOREACH(fl, &fibl_head, fl_next)
 423                 flushroutes_fib(fl->fl_num);
 424 }
 425
 426 static int
 427 flushroutes_fib(int fib)
 428 {
 429         struct rt_msghdr *rtm;
 430         size_t needed;
 431         char *buf, *next, *lim;
 432         int mib[6], rlen, seqno, count = 0;
 433         int error;
 434
 435         error = set_sofib(fib);
 436         error += set_procfib(fib);
 437         if (error) {
 438                 warn("fib number %d is ignored", fib);
 439                 return (error);
 440         }
 441
 442 retry:
 443         mib[0] = CTL_NET;
 444         mib[1] = PF_ROUTE;
 445         mib[2] = 0;             /* protocol */
 446         mib[3] = 0;             /* wildcard address family */
 447         mib[4] = NET_RT_DUMP;
 448         mib[5] = 0;             /* no flags */
 449         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
 450                 err(EX_OSERR, "route-sysctl-estimate");
 451         if ((buf = malloc(needed)) == NULL)
 452                 errx(EX_OSERR, "malloc failed");
 453         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
 454                 if (errno == ENOMEM && count++ < 10) {
 455                         warnx("Routing table grew, retrying");
 456                         sleep(1);
 457                         free(buf);
 458                         goto retry;
 459                 }
 460                 err(EX_OSERR, "route-sysctl-get");
 461         }
 462         lim = buf + needed;
 463         if (verbose)
 464                 (void) printf("Examining routing table from sysctl\n");
 465         seqno = 0;              /* ??? */
 466         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 467                 rtm = (struct rt_msghdr *)next;
 468                 if (verbose)
 469                         print_rtmsg(rtm, rtm->rtm_msglen);
 470                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 471                         continue;
 472                 if (af != 0) {
 473                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 474
 475                         if (sa->sa_family != af)
 476                                 continue;
 477                 }
 478                 if (debugonly)
 479                         continue;
 480                 rtm->rtm_type = RTM_DELETE;
 481                 rtm->rtm_seq = seqno;
 482                 rlen = write(s, next, rtm->rtm_msglen);
 483                 if (rlen < 0 && errno == EPERM)
 484                         err(1, "write to routing socket");
 485                 if (rlen < (int)rtm->rtm_msglen) {
 486                         warn("write to routing socket");
 487                         (void) printf("got only %d for rlen\n", rlen);
 488                         free(buf);
 489                         goto retry;
 490                         break;
 491                 }
 492                 seqno++;
 493                 if (qflag)
 494                         continue;
 495                 if (verbose)
 496                         print_rtmsg(rtm, rlen);
 497                 else {
 498                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 499
 500                         printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 501                             routename(sa) : netname(sa));
 502                         sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
 503                         printf("%-20.20s ", routename(sa));
 504                         if (fib >= 0)
 505                                 printf("-fib %-3d ", fib);
 506                         printf("done\n");
 507                 }
 508         }
 509         return (error);
 510 }
 511
 512 const char *
 513 routename(struct sockaddr *sa)
 514 {
 515         const char *cp;
 516         static char line[MAXHOSTNAMELEN + 1];
 517         struct hostent *hp;
 518         static char domain[MAXHOSTNAMELEN + 1];
 519         static int first = 1, n;
 520
 521         if (first) {
 522                 first = 0;
 523                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 524                     (cp = strchr(domain, '.'))) {
 525                         domain[MAXHOSTNAMELEN] = '\0';
 526                         (void) strcpy(domain, cp + 1);
 527                 } else
 528                         domain[0] = 0;
 529         }
 530
 531         if (sa->sa_len == 0)
 532                 strcpy(line, "default");
 533         else switch (sa->sa_family) {
 534
 535         case AF_INET:
 536             {   struct in_addr in;
 537                 in = ((struct sockaddr_in *)sa)->sin_addr;
 538
 539                 cp = NULL;
 540                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 541                         cp = "default";
 542                 if (cp == NULL && !nflag) {
 543                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 544                                 AF_INET);
 545                         if (hp != NULL) {
 546                                 char *cptr;
 547                                 cptr = strchr(hp->h_name, '.');
 548                                 if (cptr != NULL &&
 549                                     strcmp(cptr + 1, domain) == 0)
 550                                         *cptr = '\0';
 551                                 cp = hp->h_name;
 552                         }
 553                 }
 554                 if (cp != NULL) {
 555                         strncpy(line, cp, sizeof(line) - 1);
 556                         line[sizeof(line) - 1] = '\0';
 557                 } else
 558                         (void) sprintf(line, "%s", inet_ntoa(in));
 559                 break;
 560             }
 561
 562 #ifdef INET6
 563         case AF_INET6:
 564         {
 565                 struct sockaddr_in6 sin6; /* use static var for safety */
 566                 int niflags = 0;
 567
 568                 memset(&sin6, 0, sizeof(sin6));
 569                 memcpy(&sin6, sa, sa->sa_len);
 570                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 571                 sin6.sin6_family = AF_INET6;
 572 #ifdef __KAME__
 573                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 574                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 575                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) ||
 576                      IN6_IS_ADDR_MC_NODELOCAL(&sin6.sin6_addr)) &&
 577                     sin6.sin6_scope_id == 0) {
 578                         sin6.sin6_scope_id =
 579                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 580                         sin6.sin6_addr.s6_addr[2] = 0;
 581                         sin6.sin6_addr.s6_addr[3] = 0;
 582                 }
 583 #endif
 584                 if (nflag)
 585                         niflags |= NI_NUMERICHOST;
 586                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 587                     line, sizeof(line), NULL, 0, niflags) != 0)
 588                         strncpy(line, "invalid", sizeof(line));
 589
 590                 return(line);
 591         }
 592 #endif
 593
 594         case AF_APPLETALK:
 595                 (void) snprintf(line, sizeof(line), "atalk %s",
 596                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 597                 break;
 598
 599         case AF_LINK:
 600                 return (link_ntoa((struct sockaddr_dl *)sa));
 601
 602         default:
 603             {
 604                 u_short *sp = (u_short *)sa;
 605                 u_short *splim = sp + ((sa->sa_len + 1) >> 1);
 606                 char *cps = line + sprintf(line, "(%d)", sa->sa_family);
 607                 char *cpe = line + sizeof(line);
 608
 609                 while (++sp < splim && cps < cpe) /* start with sa->sa_data */
 610                         if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0)
 611                                 cps += n;
 612                         else
 613                                 *cps = '\0';
 614                 break;
 615             }
 616         }
 617         return (line);
 618 }
 619
 620 /*
 621  * Return the name of the network whose address is given.
 622  * The address is assumed to be that of a net or subnet, not a host.
 623  */
 624 const char *
 625 netname(struct sockaddr *sa)
 626 {
 627         const char *cp = NULL;
 628         static char line[MAXHOSTNAMELEN + 1];
 629         struct netent *np = NULL;
 630         u_long net, mask;
 631         u_long i;
 632         int n, subnetshift;
 633
 634         switch (sa->sa_family) {
 635
 636         case AF_INET:
 637             {   struct in_addr in;
 638                 in = ((struct sockaddr_in *)sa)->sin_addr;
 639
 640                 i = in.s_addr = ntohl(in.s_addr);
 641                 if (in.s_addr == 0)
 642                         cp = "default";
 643                 else if (!nflag) {
 644                         if (IN_CLASSA(i)) {
 645                                 mask = IN_CLASSA_NET;
 646                                 subnetshift = 8;
 647                         } else if (IN_CLASSB(i)) {
 648                                 mask = IN_CLASSB_NET;
 649                                 subnetshift = 8;
 650                         } else {
 651                                 mask = IN_CLASSC_NET;
 652                                 subnetshift = 4;
 653                         }
 654                         /*
 655                          * If there are more bits than the standard mask
 656                          * would suggest, subnets must be in use.
 657                          * Guess at the subnet mask, assuming reasonable
 658                          * width subnet fields.
 659                          */
 660                         while (in.s_addr &~ mask)
 661                                 mask = (long)mask >> subnetshift;
 662                         net = in.s_addr & mask;
 663                         while ((mask & 1) == 0)
 664                                 mask >>= 1, net >>= 1;
 665                         np = getnetbyaddr(net, AF_INET);
 666                         if (np != NULL)
 667                                 cp = np->n_name;
 668                 }
 669 #define C(x)    (unsigned)((x) & 0xff)
 670                 if (cp != NULL)
 671                         strncpy(line, cp, sizeof(line));
 672                 else if ((in.s_addr & 0xffffff) == 0)
 673                         (void) sprintf(line, "%u", C(in.s_addr >> 24));
 674                 else if ((in.s_addr & 0xffff) == 0)
 675                         (void) sprintf(line, "%u.%u", C(in.s_addr >> 24),
 676                             C(in.s_addr >> 16));
 677                 else if ((in.s_addr & 0xff) == 0)
 678                         (void) sprintf(line, "%u.%u.%u", C(in.s_addr >> 24),
 679                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 680                 else
 681                         (void) sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 682                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 683                             C(in.s_addr));
 684 #undef C
 685                 break;
 686             }
 687
 688 #ifdef INET6
 689         case AF_INET6:
 690         {
 691                 struct sockaddr_in6 sin6; /* use static var for safety */
 692                 int niflags = 0;
 693
 694                 memset(&sin6, 0, sizeof(sin6));
 695                 memcpy(&sin6, sa, sa->sa_len);
 696                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 697                 sin6.sin6_family = AF_INET6;
 698 #ifdef __KAME__
 699                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 700                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 701                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) ||
 702                      IN6_IS_ADDR_MC_NODELOCAL(&sin6.sin6_addr)) &&
 703                     sin6.sin6_scope_id == 0) {
 704                         sin6.sin6_scope_id =
 705                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 706                         sin6.sin6_addr.s6_addr[2] = 0;
 707                         sin6.sin6_addr.s6_addr[3] = 0;
 708                 }
 709 #endif
 710                 if (nflag)
 711                         niflags |= NI_NUMERICHOST;
 712                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 713                     line, sizeof(line), NULL, 0, niflags) != 0)
 714                         strncpy(line, "invalid", sizeof(line));
 715
 716                 return(line);
 717         }
 718 #endif
 719
 720         case AF_APPLETALK:
 721                 (void) snprintf(line, sizeof(line), "atalk %s",
 722                         atalk_ntoa(((struct sockaddr_at *)sa)->sat_addr));
 723                 break;
 724
 725         case AF_LINK:
 726                 return (link_ntoa((struct sockaddr_dl *)sa));
 727
 728
 729         default:
 730             {
 731                 u_short *sp = (u_short *)sa->sa_data;
 732                 u_short *splim = sp + ((sa->sa_len + 1)>>1);
 733                 char *cps = line + sprintf(line, "af %d:", sa->sa_family);
 734                 char *cpe = line + sizeof(line);
 735
 736                 while (sp < splim && cps < cpe)
 737                         if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0)
 738                                 cps += n;
 739                         else
 740                                 *cps = '\0';
 741                 break;
 742             }
 743         }
 744         return (line);
 745 }
 746
 747 static void
 748 set_metric(char *value, int key)
 749 {
 750         int flag = 0;
 751         u_long noval, *valp = &noval;
 752
 753         switch (key) {
 754 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 755         caseof(K_MTU, RTV_MTU, rmx_mtu);
 756         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 757         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 758         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 759         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 760         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 761         caseof(K_RTT, RTV_RTT, rmx_rtt);
 762         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 763         caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight);
 764         }
 765         rtm_inits |= flag;
 766         if (lockrest || locking)
 767                 rt_metrics.rmx_locks |= flag;
 768         if (locking)
 769                 locking = 0;
 770         *valp = atoi(value);
 771 }
 772
 773 #define F_ISHOST        0x01
 774 #define F_FORCENET      0x02
 775 #define F_FORCEHOST     0x04
 776 #define F_PROXY         0x08
 777 #define F_INTERFACE     0x10
 778
 779 static void
 780 newroute(int argc, char **argv)
 781 {
 782         struct hostent *hp;
 783         struct fibl *fl;
 784         char *cmd;
 785         const char *dest, *gateway, *errmsg;
 786         int key, error, flags, nrflags, fibnum;
 787
 788         if (uid != 0) {
 789                 errx(EX_NOPERM, "must be root to alter routing table");
 790         }
 791
 792         dest = NULL;
 793         gateway = NULL;
 794         flags = RTF_STATIC;
 795         nrflags = 0;
 796         hp = NULL;
 797         TAILQ_INIT(&fibl_head);
 798
 799         cmd = argv[0];
 800         if (*cmd != 'g' && *cmd != 's')
 801                 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 802
 803         while (--argc > 0) {
 804                 if (**(++argv)== '-') {
 805                         switch (key = keyword(1 + *argv)) {
 806                         case K_LINK:
 807                                 af = AF_LINK;
 808                                 aflen = sizeof(struct sockaddr_dl);
 809                                 break;
 810                         case K_INET:
 811                                 af = AF_INET;
 812                                 aflen = sizeof(struct sockaddr_in);
 813                                 break;
 814 #ifdef INET6
 815                         case K_INET6:
 816                                 af = AF_INET6;
 817                                 aflen = sizeof(struct sockaddr_in6);
 818                                 break;
 819 #endif
 820                         case K_ATALK:
 821                                 af = AF_APPLETALK;
 822                                 aflen = sizeof(struct sockaddr_at);
 823                                 break;
 824                         case K_SA:
 825                                 af = PF_ROUTE;
 826                                 aflen = sizeof(union sockunion);
 827                                 break;
 828                         case K_IFACE:
 829                         case K_INTERFACE:
 830                                 nrflags |= F_INTERFACE;
 831                                 break;
 832                         case K_NOSTATIC:
 833                                 flags &= ~RTF_STATIC;
 834                                 break;
 835                         case K_LOCK:
 836                                 locking = 1;
 837                                 break;
 838                         case K_LOCKREST:
 839                                 lockrest = 1;
 840                                 break;
 841                         case K_HOST:
 842                                 nrflags |= F_FORCEHOST;
 843                                 break;
 844                         case K_REJECT:
 845                                 flags |= RTF_REJECT;
 846                                 break;
 847                         case K_BLACKHOLE:
 848                                 flags |= RTF_BLACKHOLE;
 849                                 break;
 850                         case K_PROTO1:
 851                                 flags |= RTF_PROTO1;
 852                                 break;
 853                         case K_PROTO2:
 854                                 flags |= RTF_PROTO2;
 855                                 break;
 856                         case K_PROXY:
 857                                 nrflags |= F_PROXY;
 858                                 break;
 859                         case K_XRESOLVE:
 860                                 flags |= RTF_XRESOLVE;
 861                                 break;
 862                         case K_STATIC:
 863                                 flags |= RTF_STATIC;
 864                                 break;
 865                         case K_STICKY:
 866                                 flags |= RTF_STICKY;
 867                                 break;
 868                         case K_NOSTICK:
 869                                 flags &= ~RTF_STICKY;
 870                                 break;
 871                         case K_FIB:
 872                                 if (!--argc)
 873                                         usage(NULL);
 874                                 error = fiboptlist_csv(*++argv, &fibl_head);
 875                                 if (error)
 876                                         errx(EX_USAGE,
 877                                             "invalid fib number: %s", *argv);
 878                                 break;
 879                         case K_IFA:
 880                                 if (!--argc)
 881                                         usage(NULL);
 882                                 getaddr(RTA_IFA, *++argv, 0, nrflags);
 883                                 break;
 884                         case K_IFP:
 885                                 if (!--argc)
 886                                         usage(NULL);
 887                                 getaddr(RTA_IFP, *++argv, 0, nrflags);
 888                                 break;
 889                         case K_GENMASK:
 890                                 if (!--argc)
 891                                         usage(NULL);
 892                                 getaddr(RTA_GENMASK, *++argv, 0, nrflags);
 893                                 break;
 894                         case K_GATEWAY:
 895                                 if (!--argc)
 896                                         usage(NULL);
 897                                 getaddr(RTA_GATEWAY, *++argv, 0, nrflags);
 898                                 gateway = *argv;
 899                                 break;
 900                         case K_DST:
 901                                 if (!--argc)
 902                                         usage(NULL);
 903                                 if (getaddr(RTA_DST, *++argv, &hp, nrflags))
 904                                         nrflags |= F_ISHOST;
 905                                 dest = *argv;
 906                                 break;
 907                         case K_NETMASK:
 908                                 if (!--argc)
 909                                         usage(NULL);
 910                                 getaddr(RTA_NETMASK, *++argv, 0, nrflags);
 911                                 /* FALLTHROUGH */
 912                         case K_NET:
 913                                 nrflags |= F_FORCENET;
 914                                 break;
 915                         case K_PREFIXLEN:
 916                                 if (!--argc)
 917                                         usage(NULL);
 918                                 if (prefixlen(*++argv) == -1) {
 919                                         nrflags &= ~F_FORCENET;
 920                                         nrflags |= F_ISHOST;
 921                                 } else {
 922                                         nrflags |= F_FORCENET;
 923                                         nrflags &= ~F_ISHOST;
 924                                 }
 925                                 break;
 926                         case K_MTU:
 927                         case K_HOPCOUNT:
 928                         case K_EXPIRE:
 929                         case K_RECVPIPE:
 930                         case K_SENDPIPE:
 931                         case K_SSTHRESH:
 932                         case K_RTT:
 933                         case K_RTTVAR:
 934                         case K_WEIGHT:
 935                                 if (!--argc)
 936                                         usage(NULL);
 937                                 set_metric(*++argv, key);
 938                                 break;
 939                         default:
 940                                 usage(1+*argv);
 941                         }
 942                 } else {
 943                         if ((rtm_addrs & RTA_DST) == 0) {
 944                                 dest = *argv;
 945                                 if (getaddr(RTA_DST, *argv, &hp, nrflags))
 946                                         nrflags |= F_ISHOST;
 947                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 948                                 gateway = *argv;
 949                                 getaddr(RTA_GATEWAY, *argv, &hp, nrflags);
 950                         } else {
 951                                 getaddr(RTA_NETMASK, *argv, 0, nrflags);
 952                                 nrflags |= F_FORCENET;
 953                         }
 954                 }
 955         }
 956
 957         if (nrflags & F_FORCEHOST) {
 958                 nrflags |= F_ISHOST;
 959 #ifdef INET6
 960                 if (af == AF_INET6) {
 961                         rtm_addrs &= ~RTA_NETMASK;
 962                         memset((void *)&so_mask, 0, sizeof(so_mask));
 963                 }
 964 #endif
 965         }
 966         if (nrflags & F_FORCENET)
 967                 nrflags &= ~F_ISHOST;
 968         flags |= RTF_UP;
 969         if (nrflags & F_ISHOST)
 970                 flags |= RTF_HOST;
 971         if ((nrflags & F_INTERFACE) == 0)
 972                 flags |= RTF_GATEWAY;
 973         if (nrflags & F_PROXY) {
 974                 so_dst.sinarp.sin_other = SIN_PROXY;
 975                 flags |= RTF_ANNOUNCE;
 976         }
 977         if (dest == NULL)
 978                 dest = "";
 979         if (gateway == NULL)
 980                 gateway = "";
 981
 982         if (TAILQ_EMPTY(&fibl_head)) {
 983                 error = fiboptlist_csv("default", &fibl_head);
 984                 if (error)
 985                         errx(EX_OSERR, "fiboptlist_csv failed.");
 986         }
 987         error = 0;
 988         TAILQ_FOREACH(fl, &fibl_head, fl_next) {
 989                 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags);
 990                 if (fl->fl_error)
 991                         fl->fl_errno = errno;
 992                 error += fl->fl_error;
 993         }
 994         if (*cmd == 'g' || *cmd == 's')
 995                 exit(error);
 996
 997         error = 0;
 998         if (!qflag) {
 999                 fibnum = 0;
1000                 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1001                         if (fl->fl_error == 0)
1002                                 fibnum++;
1003                 }
1004                 if (fibnum > 0) {
1005                         int firstfib = 1;
1006
1007                         printf("%s %s %s", cmd,
1008                             (nrflags & F_ISHOST) ? "host" : "net", dest);
1009                         if (*gateway)
1010                                 printf(": gateway %s", gateway);
1011
1012                         if (numfibs > 1) {
1013                                 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1014                                         if (fl->fl_error == 0
1015                                             && fl->fl_num >= 0) {
1016                                                 if (firstfib) {
1017                                                         printf(" fib ");
1018                                                         firstfib = 0;
1019                                                 }
1020                                                 printf("%d", fl->fl_num);
1021                                                 if (fibnum-- > 1)
1022                                                         printf(",");
1023                                         }
1024                                 }
1025                         }
1026                         printf("\n");
1027                 }
1028
1029                 fibnum = 0;
1030                 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1031                         if (fl->fl_error != 0) {
1032                                 printf("%s %s %s", cmd, (nrflags & F_ISHOST)
1033                                     ? "host" : "net", dest);
1034                                 if (*gateway)
1035                                         printf(": gateway %s", gateway);
1036
1037                                 if (fl->fl_num >= 0)
1038                                         printf(" fib %d", fl->fl_num);
1039
1040                                 switch (fl->fl_errno) {
1041                                 case ESRCH:
1042                                         errmsg = "not in table";
1043                                         break;
1044                                 case EBUSY:
1045                                         errmsg = "entry in use";
1046                                         break;
1047                                 case ENOBUFS:
1048                                         errmsg = "not enough memory";
1049                                         break;
1050                                 case EADDRINUSE:
1051                                         /*
1052                                          * handle recursion avoidance
1053                                          * in rt_setgate()
1054                                          */
1055                                         errmsg = "gateway uses the same route";
1056                                         break;
1057                                 case EEXIST:
1058                                         errmsg = "route already in table";
1059                                         break;
1060                                 default:
1061                                         errmsg = strerror(fl->fl_errno);
1062                                         break;
1063                                 }
1064                                 printf(": %s\n", errmsg);
1065                                 error = 1;
1066                         }
1067                 }
1068         }
1069         exit(error);
1070 }
1071
1072 static int
1073 newroute_fib(int fib, char *cmd, int flags)
1074 {
1075         int error;
1076
1077         error = set_sofib(fib);
1078         if (error) {
1079                 warn("fib number %d is ignored", fib);
1080                 return (error);
1081         }
1082
1083         error = rtmsg(*cmd, flags, fib);
1084         return (error);
1085 }
1086
1087 static void
1088 inet_makenetandmask(u_long net, struct sockaddr_in *sin, u_long bits)
1089 {
1090         u_long addr, mask = 0;
1091         char *cp;
1092
1093         rtm_addrs |= RTA_NETMASK;
1094         /*
1095          * XXX: This approach unable to handle 0.0.0.1/32 correctly
1096          * as inet_network() converts 0.0.0.1 and 1 equally.
1097          */
1098         if (net <= 0xff)
1099                 addr = net << IN_CLASSA_NSHIFT;
1100         else if (net <= 0xffff)
1101                 addr = net << IN_CLASSB_NSHIFT;
1102         else if (net <= 0xffffff)
1103                 addr = net << IN_CLASSC_NSHIFT;
1104         else
1105                 addr = net;
1106         /*
1107          * If no /xx was specified we must calculate the
1108          * CIDR address.
1109          */
1110         if ((bits == 0)  && (addr != 0)) {
1111                 u_long i, j;
1112                 for(i=0,j=0xff; i<4; i++)  {
1113                         if (addr & j) {
1114                                 break;
1115                         }
1116                         j <<= 8;
1117                 }
1118                 /* i holds the first non zero bit */
1119                 bits = 32 - (i*8);
1120         }
1121         if (bits != 0)
1122                 mask = 0xffffffff << (32 - bits);
1123
1124         sin->sin_addr.s_addr = htonl(addr);
1125         sin = &so_mask.sin;
1126         sin->sin_addr.s_addr = htonl(mask);
1127         sin->sin_len = 0;
1128         sin->sin_family = 0;
1129         cp = (char *)(&sin->sin_addr + 1);
1130         while (*--cp == 0 && cp > (char *)sin)
1131                 ;
1132         sin->sin_len = 1 + cp - (char *)sin;
1133 }
1134
1135 #ifdef INET6
1136 /*
1137  * XXX the function may need more improvement...
1138  */
1139 static int
1140 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
1141 {
1142         struct in6_addr in6;
1143
1144         if (plen == NULL) {
1145                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
1146                     sin6->sin6_scope_id == 0) {
1147                         plen = "0";
1148                 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) {
1149                         /* aggregatable global unicast - RFC2374 */
1150                         memset(&in6, 0, sizeof(in6));
1151                         if (!memcmp(&sin6->sin6_addr.s6_addr[8],
1152                                     &in6.s6_addr[8], 8))
1153                                 plen = "64";
1154                 }
1155         }
1156
1157         if (plen == NULL || strcmp(plen, "128") == 0)
1158                 return (1);
1159         rtm_addrs |= RTA_NETMASK;
1160         prefixlen(plen);
1161         return (0);
1162 }
1163 #endif
1164
1165 /*
1166  * Interpret an argument as a network address of some kind,
1167  * returning 1 if a host address, 0 if a network address.
1168  */
1169 static int
1170 getaddr(int which, char *str, struct hostent **hpp, int nrflags)
1171 {
1172         sup su;
1173         struct hostent *hp;
1174         struct netent *np;
1175         u_long val;
1176         char *q;
1177         int afamily;  /* local copy of af so we can change it */
1178
1179         if (af == 0) {
1180                 af = AF_INET;
1181                 aflen = sizeof(struct sockaddr_in);
1182         }
1183         afamily = af;
1184         rtm_addrs |= which;
1185         switch (which) {
1186         case RTA_DST:
1187                 su = &so_dst;
1188                 break;
1189         case RTA_GATEWAY:
1190                 su = &so_gate;
1191                 if (nrflags & F_INTERFACE) {
1192                         struct ifaddrs *ifap, *ifa;
1193                         struct sockaddr_dl *sdl = NULL;
1194
1195                         if (getifaddrs(&ifap))
1196                                 err(1, "getifaddrs");
1197
1198                         for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
1199                                 if (ifa->ifa_addr->sa_family != AF_LINK)
1200                                         continue;
1201
1202                                 if (strcmp(str, ifa->ifa_name) != 0)
1203                                         continue;
1204
1205                                 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1206                         }
1207                         /* If we found it, then use it */
1208                         if (sdl != NULL) {
1209                                 /*
1210                                  * Copy is safe since we have a
1211                                  * sockaddr_storage member in sockunion{}.
1212                                  * Note that we need to copy before calling
1213                                  * freeifaddrs().
1214                                  */
1215                                 memcpy(&su->sdl, sdl, sdl->sdl_len);
1216                         }
1217                         freeifaddrs(ifap);
1218                         if (sdl != NULL)
1219                                 return(1);
1220                 }
1221                 break;
1222         case RTA_NETMASK:
1223                 su = &so_mask;
1224                 break;
1225         case RTA_GENMASK:
1226                 su = &so_genmask;
1227                 break;
1228         case RTA_IFP:
1229                 su = &so_ifp;
1230                 afamily = AF_LINK;
1231                 break;
1232         case RTA_IFA:
1233                 su = &so_ifa;
1234                 break;
1235         default:
1236                 usage("internal error");
1237                 /*NOTREACHED*/
1238         }
1239         su->sa.sa_len = aflen;
1240         su->sa.sa_family = afamily; /* cases that don't want it have left already */
1241         if (strcmp(str, "default") == 0) {
1242                 /*
1243                  * Default is net 0.0.0.0/0
1244                  */
1245                 switch (which) {
1246                 case RTA_DST:
1247                         forcenet++;
1248 #if 0
1249                         bzero(su, sizeof(*su)); /* for readability */
1250 #endif
1251                         getaddr(RTA_NETMASK, str, 0, nrflags);
1252                         break;
1253 #if 0
1254                 case RTA_NETMASK:
1255                 case RTA_GENMASK:
1256                         bzero(su, sizeof(*su)); /* for readability */
1257 #endif
1258                 }
1259                 return (0);
1260         }
1261         switch (afamily) {
1262 #ifdef INET6
1263         case AF_INET6:
1264         {
1265                 struct addrinfo hints, *res;
1266                 int ecode;
1267
1268                 q = NULL;
1269                 if (which == RTA_DST && (q = strchr(str, '/')) != NULL)
1270                         *q = '\0';
1271                 memset(&hints, 0, sizeof(hints));
1272                 hints.ai_family = afamily;      /*AF_INET6*/
1273                 hints.ai_socktype = SOCK_DGRAM;         /*dummy*/
1274                 ecode = getaddrinfo(str, NULL, &hints, &res);
1275                 if (ecode != 0 || res->ai_family != AF_INET6 ||
1276                     res->ai_addrlen != sizeof(su->sin6)) {
1277                         (void) fprintf(stderr, "%s: %s\n", str,
1278                             gai_strerror(ecode));
1279                         exit(1);
1280                 }
1281                 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6));
1282 #ifdef __KAME__
1283                 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) ||
1284                      IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr) ||
1285                      IN6_IS_ADDR_MC_NODELOCAL(&su->sin6.sin6_addr)) &&
1286                     su->sin6.sin6_scope_id) {
1287                         *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] =
1288                                 htons(su->sin6.sin6_scope_id);
1289                         su->sin6.sin6_scope_id = 0;
1290                 }
1291 #endif
1292                 freeaddrinfo(res);
1293                 if (q != NULL)
1294                         *q++ = '/';
1295                 if (which == RTA_DST)
1296                         return (inet6_makenetandmask(&su->sin6, q));
1297                 return (0);
1298         }
1299 #endif /* INET6 */
1300
1301         case AF_APPLETALK:
1302                 if (!atalk_aton(str, &su->sat.sat_addr))
1303                         errx(EX_NOHOST, "bad address: %s", str);
1304                 rtm_addrs |= RTA_NETMASK;
1305                 return(forcehost || su->sat.sat_addr.s_node != 0);
1306
1307         case AF_LINK:
1308                 link_addr(str, &su->sdl);
1309                 return (1);
1310
1311
1312         case PF_ROUTE:
1313                 su->sa.sa_len = sizeof(*su);
1314                 sockaddr(str, &su->sa);
1315                 return (1);
1316
1317         case AF_INET:
1318         default:
1319                 break;
1320         }
1321
1322         if (hpp == NULL)
1323                 hpp = &hp;
1324         *hpp = NULL;
1325
1326         q = strchr(str,'/');
1327         if (q != NULL && which == RTA_DST) {
1328                 *q = '\0';
1329                 if ((val = inet_network(str)) != INADDR_NONE) {
1330                         inet_makenetandmask(
1331                                 val, &su->sin, strtoul(q+1, 0, 0));
1332                         return (0);
1333                 }
1334                 *q = '/';
1335         }
1336         if ((which != RTA_DST || forcenet == 0) &&
1337             inet_aton(str, &su->sin.sin_addr)) {
1338                 val = su->sin.sin_addr.s_addr;
1339                 if (which != RTA_DST || forcehost ||
1340                     inet_lnaof(su->sin.sin_addr) != INADDR_ANY)
1341                         return (1);
1342                 else {
1343                         val = ntohl(val);
1344                         goto netdone;
1345                 }
1346         }
1347         if (which == RTA_DST && forcehost == 0 &&
1348             ((val = inet_network(str)) != INADDR_NONE ||
1349             ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) {
1350 netdone:
1351                 inet_makenetandmask(val, &su->sin, 0);
1352                 return (0);
1353         }
1354         hp = gethostbyname(str);
1355         if (hp != NULL) {
1356                 *hpp = hp;
1357                 su->sin.sin_family = hp->h_addrtype;
1358                 memmove((char *)&su->sin.sin_addr, hp->h_addr,
1359                     MIN((size_t)hp->h_length, sizeof(su->sin.sin_addr)));
1360                 return (1);
1361         }
1362         errx(EX_NOHOST, "bad address: %s", str);
1363 }
1364
1365 static int
1366 prefixlen(const char *str)
1367 {
1368         int len = atoi(str), q, r;
1369         int max;
1370         char *p;
1371
1372         rtm_addrs |= RTA_NETMASK;
1373         switch (af) {
1374 #ifdef INET6
1375         case AF_INET6:
1376                 max = 128;
1377                 p = (char *)&so_mask.sin6.sin6_addr;
1378                 break;
1379 #endif
1380         case AF_INET:
1381                 max = 32;
1382                 p = (char *)&so_mask.sin.sin_addr;
1383                 break;
1384         default:
1385                 fprintf(stderr, "prefixlen not supported in this af\n");
1386                 exit(1);
1387         }
1388
1389         if (len < 0 || max < len) {
1390                 fprintf(stderr, "%s: bad value\n", str);
1391                 exit(1);
1392         }
1393
1394         q = len >> 3;
1395         r = len & 7;
1396         so_mask.sa.sa_family = af;
1397         so_mask.sa.sa_len = aflen;
1398         memset((void *)p, 0, max / 8);
1399         if (q > 0)
1400                 memset((void *)p, 0xff, q);
1401         if (r > 0)
1402                 *((u_char *)p + q) = (0xff00 >> r) & 0xff;
1403         if (len == max)
1404                 return (-1);
1405         else
1406                 return (len);
1407 }
1408
1409 static void
1410 interfaces(void)
1411 {
1412         size_t needed;
1413         int mib[6];
1414         char *buf, *lim, *next, count = 0;
1415         struct rt_msghdr *rtm;
1416
1417 retry2:
1418         mib[0] = CTL_NET;
1419         mib[1] = PF_ROUTE;
1420         mib[2] = 0;             /* protocol */
1421         mib[3] = 0;             /* wildcard address family */
1422         mib[4] = NET_RT_IFLIST;
1423         mib[5] = 0;             /* no flags */
1424         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
1425                 err(EX_OSERR, "route-sysctl-estimate");
1426         if ((buf = malloc(needed)) == NULL)
1427                 errx(EX_OSERR, "malloc failed");
1428         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
1429                 if (errno == ENOMEM && count++ < 10) {
1430                         warnx("Routing table grew, retrying");
1431                         sleep(1);
1432                         free(buf);
1433                         goto retry2;
1434                 }
1435                 err(EX_OSERR, "actual retrieval of interface table");
1436         }
1437         lim = buf + needed;
1438         for (next = buf; next < lim; next += rtm->rtm_msglen) {
1439                 rtm = (struct rt_msghdr *)next;
1440                 print_rtmsg(rtm, rtm->rtm_msglen);
1441         }
1442 }
1443
1444 static void
1445 monitor(int argc, char *argv[])
1446 {
1447         int n, fib, error;
1448         char msg[2048], *endptr;
1449
1450         fib = defaultfib;
1451         while (argc > 1) {
1452                 argc--;
1453                 argv++;
1454                 if (**argv != '-')
1455                         usage(*argv);
1456                 switch (keyword(*argv + 1)) {
1457                 case K_FIB:
1458                         if (!--argc)
1459                                 usage(*argv);
1460                         errno = 0;
1461                         fib = strtol(*++argv, &endptr, 0);
1462                         if (errno == 0) {
1463                                 if (*endptr != '\0' ||
1464                                     fib < 0 ||
1465                                     (numfibs != -1 && fib > numfibs - 1))
1466                                         errno = EINVAL;
1467                         }
1468                         if (errno)
1469                                 errx(EX_USAGE, "invalid fib number: %s", *argv);
1470                         break;
1471                 default:
1472                         usage(*argv);
1473                 }
1474         }
1475         error = set_sofib(fib);
1476         if (error)
1477                 errx(EX_USAGE, "invalid fib number: %d", fib);
1478
1479         verbose = 1;
1480         if (debugonly) {
1481                 interfaces();
1482                 exit(0);
1483         }
1484         for (;;) {
1485                 time_t now;
1486                 n = read(s, msg, 2048);
1487                 now = time(NULL);
1488                 (void) printf("\ngot message of size %d on %s", n, ctime(&now));
1489                 print_rtmsg((struct rt_msghdr *)msg, n);
1490         }
1491 }
1492
1493 struct {
1494         struct  rt_msghdr m_rtm;
1495         char    m_space[512];
1496 } m_rtmsg;
1497
1498 static int
1499 rtmsg(int cmd, int flags, int fib)
1500 {
1501         static int seq;
1502         int rlen;
1503         char *cp = m_rtmsg.m_space;
1504         int l;
1505
1506 #define NEXTADDR(w, u) \
1507         if (rtm_addrs & (w)) {\
1508             l = SA_SIZE(&(u.sa)); memmove(cp, &(u), l); cp += l;\
1509             if (verbose) sodump(&(u),#u);\
1510         }
1511
1512         errno = 0;
1513         memset(&m_rtmsg, 0, sizeof(m_rtmsg));
1514         if (cmd == 'a')
1515                 cmd = RTM_ADD;
1516         else if (cmd == 'c')
1517                 cmd = RTM_CHANGE;
1518         else if (cmd == 'g' || cmd == 's') {
1519                 cmd = RTM_GET;
1520                 if (so_ifp.sa.sa_family == 0) {
1521                         so_ifp.sa.sa_family = AF_LINK;
1522                         so_ifp.sa.sa_len = sizeof(struct sockaddr_dl);
1523                         rtm_addrs |= RTA_IFP;
1524                 }
1525         } else
1526                 cmd = RTM_DELETE;
1527 #define rtm m_rtmsg.m_rtm
1528         rtm.rtm_type = cmd;
1529         rtm.rtm_flags = flags;
1530         rtm.rtm_version = RTM_VERSION;
1531         rtm.rtm_seq = ++seq;
1532         rtm.rtm_addrs = rtm_addrs;
1533         rtm.rtm_rmx = rt_metrics;
1534         rtm.rtm_inits = rtm_inits;
1535
1536         if (rtm_addrs & RTA_NETMASK)
1537                 mask_addr();
1538         NEXTADDR(RTA_DST, so_dst);
1539         NEXTADDR(RTA_GATEWAY, so_gate);
1540         NEXTADDR(RTA_NETMASK, so_mask);
1541         NEXTADDR(RTA_GENMASK, so_genmask);
1542         NEXTADDR(RTA_IFP, so_ifp);
1543         NEXTADDR(RTA_IFA, so_ifa);
1544         rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1545         if (verbose)
1546                 print_rtmsg(&rtm, l);
1547         if (debugonly)
1548                 return (0);
1549         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
1550                 if (errno == EPERM)
1551                         err(1, "writing to routing socket");
1552                 warn("writing to routing socket");
1553                 return (-1);
1554         }
1555         if (cmd == RTM_GET) {
1556                 do {
1557                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1558                 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1559                 if (l < 0)
1560                         warn("read from routing socket");
1561                 else
1562                         print_getmsg(&rtm, l, fib);
1563         }
1564 #undef rtm
1565         return (0);
1566 }
1567
1568 static void
1569 mask_addr(void)
1570 {
1571         int olen = so_mask.sa.sa_len;
1572         char *cp1 = olen + (char *)&so_mask, *cp2;
1573
1574         for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; )
1575                 if (*--cp1 != 0) {
1576                         so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask;
1577                         break;
1578                 }
1579         if ((rtm_addrs & RTA_DST) == 0)
1580                 return;
1581         switch (so_dst.sa.sa_family) {
1582         case AF_INET:
1583 #ifdef INET6
1584         case AF_INET6:
1585 #endif
1586         case AF_APPLETALK:
1587         case 0:
1588                 return;
1589         }
1590         cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst;
1591         cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst;
1592         while (cp2 > cp1)
1593                 *--cp2 = 0;
1594         cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask;
1595         while (cp1 > so_dst.sa.sa_data)
1596                 *--cp1 &= *--cp2;
1597 }
1598
1599 const char *msgtypes[] = {
1600         "",
1601         "RTM_ADD: Add Route",
1602         "RTM_DELETE: Delete Route",
1603         "RTM_CHANGE: Change Metrics or flags",
1604         "RTM_GET: Report Metrics",
1605         "RTM_LOSING: Kernel Suspects Partitioning",
1606         "RTM_REDIRECT: Told to use different route",
1607         "RTM_MISS: Lookup failed on this address",
1608         "RTM_LOCK: fix specified metrics",
1609         "RTM_OLDADD: caused by SIOCADDRT",
1610         "RTM_OLDDEL: caused by SIOCDELRT",
1611         "RTM_RESOLVE: Route created by cloning",
1612         "RTM_NEWADDR: address being added to iface",
1613         "RTM_DELADDR: address being removed from iface",
1614         "RTM_IFINFO: iface status change",
1615         "RTM_NEWMADDR: new multicast group membership on iface",
1616         "RTM_DELMADDR: multicast group membership removed from iface",
1617         "RTM_IFANNOUNCE: interface arrival/departure",
1618         "RTM_IEEE80211: IEEE 802.11 wireless event",
1619 };
1620
1621 char metricnames[] =
1622 "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire"
1623 "\1mtu";
1624 char routeflags[] =
1625 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE"
1626 "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE"
1627 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3"
1628 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY";
1629 char ifnetflags[] =
1630 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1631 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1632 "\017LINK2\020MULTICAST";
1633 char addrnames[] =
1634 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1635
1636 static const char errfmt[] =
1637 "\n%s: truncated route message, only %zu bytes left\n";
1638
1639 static void
1640 print_rtmsg(struct rt_msghdr *rtm, size_t msglen)
1641 {
1642         struct if_msghdr *ifm;
1643         struct ifa_msghdr *ifam;
1644 #ifdef RTM_NEWMADDR
1645         struct ifma_msghdr *ifmam;
1646 #endif
1647         struct if_announcemsghdr *ifan;
1648         const char *state;
1649
1650         if (verbose == 0)
1651                 return;
1652         if (rtm->rtm_version != RTM_VERSION) {
1653                 (void) printf("routing message version %d not understood\n",
1654                     rtm->rtm_version);
1655                 return;
1656         }
1657         if (rtm->rtm_type < sizeof(msgtypes) / sizeof(msgtypes[0]))
1658                 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1659         else
1660                 (void)printf("unknown type %d: ", rtm->rtm_type);
1661         (void)printf("len %d, ", rtm->rtm_msglen);
1662
1663 #define REQUIRE(x)      do {            \
1664         if (msglen < sizeof(x))         \
1665                 goto badlen;            \
1666         else                            \
1667                 msglen -= sizeof(x);    \
1668         } while (0)
1669
1670         switch (rtm->rtm_type) {
1671         case RTM_IFINFO:
1672                 REQUIRE(struct if_msghdr);
1673                 ifm = (struct if_msghdr *)rtm;
1674                 (void) printf("if# %d, ", ifm->ifm_index);
1675                 switch (ifm->ifm_data.ifi_link_state) {
1676                 case LINK_STATE_DOWN:
1677                         state = "down";
1678                         break;
1679                 case LINK_STATE_UP:
1680                         state = "up";
1681                         break;
1682                 default:
1683                         state = "unknown";
1684                         break;
1685                 }
1686                 (void) printf("link: %s, flags:", state);
1687                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
1688                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen);
1689                 break;
1690         case RTM_NEWADDR:
1691         case RTM_DELADDR:
1692                 REQUIRE(struct ifa_msghdr);
1693                 ifam = (struct ifa_msghdr *)rtm;
1694                 (void) printf("metric %d, flags:", ifam->ifam_metric);
1695                 bprintf(stdout, ifam->ifam_flags, routeflags);
1696                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen);
1697                 break;
1698 #ifdef RTM_NEWMADDR
1699         case RTM_NEWMADDR:
1700         case RTM_DELMADDR:
1701                 REQUIRE(struct ifma_msghdr);
1702                 ifmam = (struct ifma_msghdr *)rtm;
1703                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen);
1704                 break;
1705 #endif
1706         case RTM_IFANNOUNCE:
1707                 REQUIRE(struct if_announcemsghdr);
1708                 ifan = (struct if_announcemsghdr *)rtm;
1709                 (void) printf("if# %d, what: ", ifan->ifan_index);
1710                 switch (ifan->ifan_what) {
1711                 case IFAN_ARRIVAL:
1712                         printf("arrival");
1713                         break;
1714                 case IFAN_DEPARTURE:
1715                         printf("departure");
1716                         break;
1717                 default:
1718                         printf("#%d", ifan->ifan_what);
1719                         break;
1720                 }
1721                 printf("\n");
1722                 fflush(stdout);
1723                 break;
1724
1725         default:
1726                 (void) printf("pid: %ld, seq %d, errno %d, flags:",
1727                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1728                 bprintf(stdout, rtm->rtm_flags, routeflags);
1729                 pmsg_common(rtm, msglen);
1730         }
1731
1732         return;
1733
1734 badlen:
1735         (void)printf(errfmt, __func__, msglen);
1736 #undef  REQUIRE
1737 }
1738
1739 static void
1740 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib)
1741 {
1742         struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL;
1743         struct sockaddr_dl *ifp = NULL;
1744         struct sockaddr *sa;
1745         char *cp;
1746         int i;
1747
1748         (void) printf("   route to: %s\n",
1749             routename((struct sockaddr *)&so_dst));
1750         if (rtm->rtm_version != RTM_VERSION) {
1751                 warnx("routing message version %d not understood",
1752                      rtm->rtm_version);
1753                 return;
1754         }
1755         if (rtm->rtm_msglen > msglen) {
1756                 warnx("message length mismatch, in packet %d, returned %d",
1757                       rtm->rtm_msglen, msglen);
1758         }
1759         if (rtm->rtm_errno)  {
1760                 errno = rtm->rtm_errno;
1761                 warn("message indicates error %d", errno);
1762                 return;
1763         }
1764         cp = ((char *)(rtm + 1));
1765         if (rtm->rtm_addrs)
1766                 for (i = 1; i; i <<= 1)
1767                         if (i & rtm->rtm_addrs) {
1768                                 sa = (struct sockaddr *)cp;
1769                                 switch (i) {
1770                                 case RTA_DST:
1771                                         dst = sa;
1772                                         break;
1773                                 case RTA_GATEWAY:
1774                                         gate = sa;
1775                                         break;
1776                                 case RTA_NETMASK:
1777                                         mask = sa;
1778                                         break;
1779                                 case RTA_IFP:
1780                                         if (sa->sa_family == AF_LINK &&
1781                                            ((struct sockaddr_dl *)sa)->sdl_nlen)
1782                                                 ifp = (struct sockaddr_dl *)sa;
1783                                         break;
1784                                 }
1785                                 cp += SA_SIZE(sa);
1786                         }
1787         if (dst && mask)
1788                 mask->sa_family = dst->sa_family;       /* XXX */
1789         if (dst)
1790                 (void)printf("destination: %s\n", routename(dst));
1791         if (mask) {
1792                 int savenflag = nflag;
1793
1794                 nflag = 1;
1795                 (void)printf("       mask: %s\n", routename(mask));
1796                 nflag = savenflag;
1797         }
1798         if (gate && rtm->rtm_flags & RTF_GATEWAY)
1799                 (void)printf("    gateway: %s\n", routename(gate));
1800         if (fib >= 0)
1801                 (void)printf("        fib: %u\n", (unsigned int)fib);
1802         if (ifp)
1803                 (void)printf("  interface: %.*s\n",
1804                     ifp->sdl_nlen, ifp->sdl_data);
1805         (void)printf("      flags: ");
1806         bprintf(stdout, rtm->rtm_flags, routeflags);
1807
1808 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1809 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1810
1811         (void) printf("\n%s\n", "\
1812  recvpipe  sendpipe  ssthresh  rtt,msec    mtu        weight    expire");
1813         printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1814         printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1815         printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1816         printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1817         printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1818         printf("%8ld%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT));
1819         if (rtm->rtm_rmx.rmx_expire)
1820                 rtm->rtm_rmx.rmx_expire -= time(0);
1821         printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE));
1822 #undef lock
1823 #undef msec
1824 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1825         if (verbose)
1826                 pmsg_common(rtm, msglen);
1827         else if (rtm->rtm_addrs &~ RTA_IGN) {
1828                 (void) printf("sockaddrs: ");
1829                 bprintf(stdout, rtm->rtm_addrs, addrnames);
1830                 putchar('\n');
1831         }
1832 #undef  RTA_IGN
1833 }
1834
1835 static void
1836 pmsg_common(struct rt_msghdr *rtm, size_t msglen)
1837 {
1838         (void) printf("\nlocks: ");
1839         bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames);
1840         (void) printf(" inits: ");
1841         bprintf(stdout, rtm->rtm_inits, metricnames);
1842         if (msglen > sizeof(struct rt_msghdr))
1843                 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs,
1844                     msglen - sizeof(struct rt_msghdr));
1845         else
1846                 (void) fflush(stdout);
1847 }
1848
1849 static void
1850 pmsg_addrs(char *cp, int addrs, size_t len)
1851 {
1852         struct sockaddr *sa;
1853         int i;
1854
1855         if (addrs == 0) {
1856                 (void) putchar('\n');
1857                 return;
1858         }
1859         (void) printf("\nsockaddrs: ");
1860         bprintf(stdout, addrs, addrnames);
1861         (void) putchar('\n');
1862         for (i = 1; i != 0; i <<= 1)
1863                 if (i & addrs) {
1864                         sa = (struct sockaddr *)cp;
1865                         if (len == 0 || len < SA_SIZE(sa)) {
1866                                 (void) printf(errfmt, __func__, len);
1867                                 break;
1868                         }
1869                         (void) printf(" %s", routename(sa));
1870                         len -= SA_SIZE(sa);
1871                         cp += SA_SIZE(sa);
1872                 }
1873         (void) putchar('\n');
1874         (void) fflush(stdout);
1875 }
1876
1877 static void
1878 bprintf(FILE *fp, int b, u_char *str)
1879 {
1880         int i;
1881         int gotsome = 0;
1882
1883         if (b == 0)
1884                 return;
1885         while ((i = *str++) != 0) {
1886                 if (b & (1 << (i-1))) {
1887                         if (gotsome == 0)
1888                                 i = '<';
1889                         else
1890                                 i = ',';
1891                         (void) putc(i, fp);
1892                         gotsome = 1;
1893                         for (; (i = *str) > 32; str++)
1894                                 (void) putc(i, fp);
1895                 } else
1896                         while (*str > 32)
1897                                 str++;
1898         }
1899         if (gotsome)
1900                 (void) putc('>', fp);
1901 }
1902
1903 int
1904 keyword(const char *cp)
1905 {
1906         struct keytab *kt = keywords;
1907
1908         while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
1909                 kt++;
1910         return (kt->kt_i);
1911 }
1912
1913 static void
1914 sodump(sup su, const char *which)
1915 {
1916         switch (su->sa.sa_family) {
1917         case AF_LINK:
1918                 (void) printf("%s: link %s; ",
1919                     which, link_ntoa(&su->sdl));
1920                 break;
1921         case AF_INET:
1922                 (void) printf("%s: inet %s; ",
1923                     which, inet_ntoa(su->sin.sin_addr));
1924                 break;
1925         case AF_APPLETALK:
1926                 (void) printf("%s: atalk %s; ",
1927                     which, atalk_ntoa(su->sat.sat_addr));
1928                 break;
1929         }
1930         (void) fflush(stdout);
1931 }
1932
1933 /* States*/
1934 #define VIRGIN  0
1935 #define GOTONE  1
1936 #define GOTTWO  2
1937 /* Inputs */
1938 #define DIGIT   (4*0)
1939 #define END     (4*1)
1940 #define DELIM   (4*2)
1941
1942 static void
1943 sockaddr(char *addr, struct sockaddr *sa)
1944 {
1945         char *cp = (char *)sa;
1946         int size = sa->sa_len;
1947         char *cplim = cp + size;
1948         int byte = 0, state = VIRGIN, new = 0 /* foil gcc */;
1949
1950         memset(cp, 0, size);
1951         cp++;
1952         do {
1953                 if ((*addr >= '0') && (*addr <= '9')) {
1954                         new = *addr - '0';
1955                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
1956                         new = *addr - 'a' + 10;
1957                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
1958                         new = *addr - 'A' + 10;
1959                 } else if (*addr == '\0')
1960                         state |= END;
1961                 else
1962                         state |= DELIM;
1963                 addr++;
1964                 switch (state /* | INPUT */) {
1965                 case GOTTWO | DIGIT:
1966                         *cp++ = byte; /*FALLTHROUGH*/
1967                 case VIRGIN | DIGIT:
1968                         state = GOTONE; byte = new; continue;
1969                 case GOTONE | DIGIT:
1970                         state = GOTTWO; byte = new + (byte << 4); continue;
1971                 default: /* | DELIM */
1972                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
1973                 case GOTONE | END:
1974                 case GOTTWO | END:
1975                         *cp++ = byte; /* FALLTHROUGH */
1976                 case VIRGIN | END:
1977                         break;
1978                 }
1979                 break;
1980         } while (cp < cplim);
1981         sa->sa_len = cp - (char *)sa;
1982 }
1983
1984 static int
1985 atalk_aton(const char *text, struct at_addr *addr)
1986 {
1987         u_int net, node;
1988
1989         if (sscanf(text, "%u.%u", &net, &node) != 2
1990             || net > 0xffff || node > 0xff)
1991                 return(0);
1992         addr->s_net = htons(net);
1993         addr->s_node = node;
1994         return(1);
1995 }
1996
1997 static char *
1998 atalk_ntoa(struct at_addr at)
1999 {
2000         static char buf[20];
2001
2002         (void) snprintf(buf, sizeof(buf), "%u.%u", ntohs(at.s_net), at.s_node);
2003         return(buf);
2004 }