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 <arpa/inet.h>
  59 #include <netdb.h>
  60
  61 #include <ctype.h>
  62 #include <err.h>
  63 #include <errno.h>
  64 #include <paths.h>
  65 #include <signal.h>
  66 #include <stdbool.h>
  67 #include <stdio.h>
  68 #include <stdlib.h>
  69 #include <string.h>
  70 #include <sysexits.h>
  71 #include <time.h>
  72 #include <unistd.h>
  73 #include <ifaddrs.h>
  74
  75 struct fibl {
  76         TAILQ_ENTRY(fibl)       fl_next;
  77
  78         int     fl_num;
  79         int     fl_error;
  80         int     fl_errno;
  81 };
  82
  83 static struct keytab {
  84         const char      *kt_cp;
  85         int     kt_i;
  86 } const keywords[] = {
  87 #include "keywords.h"
  88         {0, 0}
  89 };
  90
  91 static struct sockaddr_storage so[RTAX_MAX];
  92 static int      pid, rtm_addrs;
  93 static int      s;
  94 static int      nflag, af, qflag, tflag;
  95 static int      verbose, aflen;
  96 static int      locking, lockrest, debugonly;
  97 static struct rt_metrics rt_metrics;
  98 static u_long  rtm_inits;
  99 static uid_t    uid;
 100 static int      defaultfib;
 101 static int      numfibs;
 102 static char     domain[MAXHOSTNAMELEN + 1];
 103 static bool     domain_initialized;
 104 static int      rtm_seq;
 105 static char     rt_line[NI_MAXHOST];
 106 static char     net_line[MAXHOSTNAMELEN + 1];
 107
 108 static struct {
 109         struct  rt_msghdr m_rtm;
 110         char    m_space[512];
 111 } m_rtmsg;
 112
 113 static TAILQ_HEAD(fibl_head_t, fibl) fibl_head;
 114
 115 static void     printb(int, const char *);
 116 static void     flushroutes(int argc, char *argv[]);
 117 static int      flushroutes_fib(int);
 118 static int      getaddr(int, char *, struct hostent **, int);
 119 static int      keyword(const char *);
 120 #ifdef INET
 121 static void     inet_makenetandmask(u_long, struct sockaddr_in *,
 122                     struct sockaddr_in *, u_long);
 123 #endif
 124 #ifdef INET6
 125 static int      inet6_makenetandmask(struct sockaddr_in6 *, const char *);
 126 #endif
 127 static void     interfaces(void);
 128 static void     monitor(int, char*[]);
 129 static const char       *netname(struct sockaddr *);
 130 static void     newroute(int, char **);
 131 static int      newroute_fib(int, char *, int);
 132 static void     pmsg_addrs(char *, int, size_t);
 133 static void     pmsg_common(struct rt_msghdr *, size_t);
 134 static int      prefixlen(const char *);
 135 static void     print_getmsg(struct rt_msghdr *, int, int);
 136 static void     print_rtmsg(struct rt_msghdr *, size_t);
 137 static const char       *routename(struct sockaddr *);
 138 static int      rtmsg(int, int, int);
 139 static void     set_metric(char *, int);
 140 static int      set_sofib(int);
 141 static void     sockaddr(char *, struct sockaddr *, size_t);
 142 static void     sodump(struct sockaddr *, const char *);
 143 static int      fiboptlist_csv(const char *, struct fibl_head_t *);
 144 static int      fiboptlist_range(const char *, struct fibl_head_t *);
 145
 146 static void usage(const char *) __dead2;
 147
 148 #define READ_TIMEOUT    10
 149 static volatile sig_atomic_t stop_read;
 150
 151 static void
 152 stopit(int sig __unused)
 153 {
 154
 155         stop_read = 1;
 156 }
 157
 158 static void
 159 usage(const char *cp)
 160 {
 161         if (cp != NULL)
 162                 warnx("bad keyword: %s", cp);
 163         errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]");
 164         /* NOTREACHED */
 165 }
 166
 167 int
 168 main(int argc, char **argv)
 169 {
 170         int ch;
 171         size_t len;
 172
 173         if (argc < 2)
 174                 usage(NULL);
 175
 176         while ((ch = getopt(argc, argv, "46nqdtv")) != -1)
 177                 switch(ch) {
 178                 case '4':
 179 #ifdef INET
 180                         af = AF_INET;
 181                         aflen = sizeof(struct sockaddr_in);
 182 #else
 183                         errx(1, "IPv4 support is not compiled in");
 184 #endif
 185                         break;
 186                 case '6':
 187 #ifdef INET6
 188                         af = AF_INET6;
 189                         aflen = sizeof(struct sockaddr_in6);
 190 #else
 191                         errx(1, "IPv6 support is not compiled in");
 192 #endif
 193                         break;
 194                 case 'n':
 195                         nflag = 1;
 196                         break;
 197                 case 'q':
 198                         qflag = 1;
 199                         break;
 200                 case 'v':
 201                         verbose = 1;
 202                         break;
 203                 case 't':
 204                         tflag = 1;
 205                         break;
 206                 case 'd':
 207                         debugonly = 1;
 208                         break;
 209                 case '?':
 210                 default:
 211                         usage(NULL);
 212                 }
 213         argc -= optind;
 214         argv += optind;
 215
 216         pid = getpid();
 217         uid = geteuid();
 218         if (tflag)
 219                 s = open(_PATH_DEVNULL, O_WRONLY, 0);
 220         else
 221                 s = socket(PF_ROUTE, SOCK_RAW, 0);
 222         if (s < 0)
 223                 err(EX_OSERR, "socket");
 224
 225         len = sizeof(numfibs);
 226         if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1)
 227                 numfibs = -1;
 228
 229         len = sizeof(defaultfib);
 230         if (numfibs != -1 &&
 231             sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL,
 232                 0) == -1)
 233                 defaultfib = -1;
 234
 235         if (*argv != NULL)
 236                 switch (keyword(*argv)) {
 237                 case K_GET:
 238                 case K_SHOW:
 239                         uid = 0;
 240                         /* FALLTHROUGH */
 241
 242                 case K_CHANGE:
 243                 case K_ADD:
 244                 case K_DEL:
 245                 case K_DELETE:
 246                         newroute(argc, argv);
 247                         /* NOTREACHED */
 248
 249                 case K_MONITOR:
 250                         monitor(argc, argv);
 251                         /* NOTREACHED */
 252
 253                 case K_FLUSH:
 254                         flushroutes(argc, argv);
 255                         exit(0);
 256                         /* NOTREACHED */
 257                 }
 258         usage(*argv);
 259         /* NOTREACHED */
 260 }
 261
 262 static int
 263 set_sofib(int fib)
 264 {
 265
 266         if (fib < 0)
 267                 return (0);
 268         return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib,
 269             sizeof(fib)));
 270 }
 271
 272 static int
 273 fiboptlist_range(const char *arg, struct fibl_head_t *flh)
 274 {
 275         struct fibl *fl;
 276         char *str0, *str, *token, *endptr;
 277         int fib[2], i, error;
 278
 279         str0 = str = strdup(arg);
 280         error = 0;
 281         i = 0;
 282         while ((token = strsep(&str, "-")) != NULL) {
 283                 switch (i) {
 284                 case 0:
 285                 case 1:
 286                         errno = 0;
 287                         fib[i] = strtol(token, &endptr, 0);
 288                         if (errno == 0) {
 289                                 if (*endptr != '\0' ||
 290                                     fib[i] < 0 ||
 291                                     (numfibs != -1 && fib[i] > numfibs - 1))
 292                                         errno = EINVAL;
 293                         }
 294                         if (errno)
 295                                 error = 1;
 296                         break;
 297                 default:
 298                         error = 1;
 299                 }
 300                 if (error)
 301                         goto fiboptlist_range_ret;
 302                 i++;
 303         }
 304         if (fib[0] >= fib[1]) {
 305                 error = 1;
 306                 goto fiboptlist_range_ret;
 307         }
 308         for (i = fib[0]; i <= fib[1]; i++) {
 309                 fl = calloc(1, sizeof(*fl));
 310                 if (fl == NULL) {
 311                         error = 1;
 312                         goto fiboptlist_range_ret;
 313                 }
 314                 fl->fl_num = i;
 315                 TAILQ_INSERT_TAIL(flh, fl, fl_next);
 316         }
 317 fiboptlist_range_ret:
 318         free(str0);
 319         return (error);
 320 }
 321
 322 #define ALLSTRLEN       64
 323 static int
 324 fiboptlist_csv(const char *arg, struct fibl_head_t *flh)
 325 {
 326         struct fibl *fl;
 327         char *str0, *str, *token, *endptr;
 328         int fib, error;
 329
 330         str0 = str = NULL;
 331         if (strcmp("all", arg) == 0) {
 332                 str = calloc(1, ALLSTRLEN);
 333                 if (str == NULL) {
 334                         error = 1;
 335                         goto fiboptlist_csv_ret;
 336                 }
 337                 if (numfibs > 1)
 338                         snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1);
 339                 else
 340                         snprintf(str, ALLSTRLEN - 1, "%d", 0);
 341         } else if (strcmp("default", arg) == 0) {
 342                 str0 = str = calloc(1, ALLSTRLEN);
 343                 if (str == NULL) {
 344                         error = 1;
 345                         goto fiboptlist_csv_ret;
 346                 }
 347                 snprintf(str, ALLSTRLEN - 1, "%d", defaultfib);
 348         } else
 349                 str0 = str = strdup(arg);
 350
 351         error = 0;
 352         while ((token = strsep(&str, ",")) != NULL) {
 353                 if (*token != '-' && strchr(token, '-') != NULL) {
 354                         error = fiboptlist_range(token, flh);
 355                         if (error)
 356                                 goto fiboptlist_csv_ret;
 357                 } else {
 358                         errno = 0;
 359                         fib = strtol(token, &endptr, 0);
 360                         if (errno == 0) {
 361                                 if (*endptr != '\0' ||
 362                                     fib < 0 ||
 363                                     (numfibs != -1 && fib > numfibs - 1))
 364                                         errno = EINVAL;
 365                         }
 366                         if (errno) {
 367                                 error = 1;
 368                                 goto fiboptlist_csv_ret;
 369                         }
 370                         fl = calloc(1, sizeof(*fl));
 371                         if (fl == NULL) {
 372                                 error = 1;
 373                                 goto fiboptlist_csv_ret;
 374                         }
 375                         fl->fl_num = fib;
 376                         TAILQ_INSERT_TAIL(flh, fl, fl_next);
 377                 }
 378         }
 379 fiboptlist_csv_ret:
 380         if (str0 != NULL)
 381                 free(str0);
 382         return (error);
 383 }
 384
 385 /*
 386  * Purge all entries in the routing tables not
 387  * associated with network interfaces.
 388  */
 389 static void
 390 flushroutes(int argc, char *argv[])
 391 {
 392         struct fibl *fl;
 393         int error;
 394
 395         if (uid != 0 && !debugonly && !tflag)
 396                 errx(EX_NOPERM, "must be root to alter routing table");
 397         shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 398
 399         TAILQ_INIT(&fibl_head);
 400         while (argc > 1) {
 401                 argc--;
 402                 argv++;
 403                 if (**argv != '-')
 404                         usage(*argv);
 405                 switch (keyword(*argv + 1)) {
 406 #ifdef INET
 407                 case K_4:
 408                 case K_INET:
 409                         af = AF_INET;
 410                         break;
 411 #endif
 412 #ifdef INET6
 413                 case K_6:
 414                 case K_INET6:
 415                         af = AF_INET6;
 416                         break;
 417 #endif
 418                 case K_LINK:
 419                         af = AF_LINK;
 420                         break;
 421                 case K_FIB:
 422                         if (!--argc)
 423                                 usage(*argv);
 424                         error = fiboptlist_csv(*++argv, &fibl_head);
 425                         if (error)
 426                                 errx(EX_USAGE, "invalid fib number: %s", *argv);
 427                         break;
 428                 default:
 429                         usage(*argv);
 430                 }
 431         }
 432         if (TAILQ_EMPTY(&fibl_head)) {
 433                 error = fiboptlist_csv("default", &fibl_head);
 434                 if (error)
 435                         errx(EX_OSERR, "fiboptlist_csv failed.");
 436         }
 437         TAILQ_FOREACH(fl, &fibl_head, fl_next)
 438                 flushroutes_fib(fl->fl_num);
 439 }
 440
 441 static int
 442 flushroutes_fib(int fib)
 443 {
 444         struct rt_msghdr *rtm;
 445         size_t needed;
 446         char *buf, *next, *lim;
 447         int mib[7], rlen, seqno, count = 0;
 448         int error;
 449
 450         error = set_sofib(fib);
 451         if (error) {
 452                 warn("fib number %d is ignored", fib);
 453                 return (error);
 454         }
 455
 456 retry:
 457         mib[0] = CTL_NET;
 458         mib[1] = PF_ROUTE;
 459         mib[2] = 0;             /* protocol */
 460         mib[3] = AF_UNSPEC;
 461         mib[4] = NET_RT_DUMP;
 462         mib[5] = 0;             /* no flags */
 463         mib[6] = fib;
 464         if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
 465                 err(EX_OSERR, "route-sysctl-estimate");
 466         if ((buf = malloc(needed)) == NULL)
 467                 errx(EX_OSERR, "malloc failed");
 468         if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) {
 469                 if (errno == ENOMEM && count++ < 10) {
 470                         warnx("Routing table grew, retrying");
 471                         sleep(1);
 472                         free(buf);
 473                         goto retry;
 474                 }
 475                 err(EX_OSERR, "route-sysctl-get");
 476         }
 477         lim = buf + needed;
 478         if (verbose)
 479                 (void)printf("Examining routing table from sysctl\n");
 480         seqno = 0;              /* ??? */
 481         for (next = buf; next < lim; next += rtm->rtm_msglen) {
 482                 rtm = (struct rt_msghdr *)(void *)next;
 483                 if (verbose)
 484                         print_rtmsg(rtm, rtm->rtm_msglen);
 485                 if ((rtm->rtm_flags & RTF_GATEWAY) == 0)
 486                         continue;
 487                 if (af != 0) {
 488                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 489
 490                         if (sa->sa_family != af)
 491                                 continue;
 492                 }
 493                 if (debugonly)
 494                         continue;
 495                 rtm->rtm_type = RTM_DELETE;
 496                 rtm->rtm_seq = seqno;
 497                 rlen = write(s, next, rtm->rtm_msglen);
 498                 if (rlen < 0 && errno == EPERM)
 499                         err(1, "write to routing socket");
 500                 if (rlen < (int)rtm->rtm_msglen) {
 501                         warn("write to routing socket");
 502                         (void)printf("got only %d for rlen\n", rlen);
 503                         free(buf);
 504                         goto retry;
 505                         break;
 506                 }
 507                 seqno++;
 508                 if (qflag)
 509                         continue;
 510                 if (verbose)
 511                         print_rtmsg(rtm, rlen);
 512                 else {
 513                         struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
 514
 515                         printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ?
 516                             routename(sa) : netname(sa));
 517                         sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa);
 518                         printf("%-20.20s ", routename(sa));
 519                         if (fib >= 0)
 520                                 printf("-fib %-3d ", fib);
 521                         printf("done\n");
 522                 }
 523         }
 524         return (error);
 525 }
 526
 527 static const char *
 528 routename(struct sockaddr *sa)
 529 {
 530         struct sockaddr_dl *sdl;
 531         const char *cp;
 532         int n;
 533
 534         if (!domain_initialized) {
 535                 domain_initialized = true;
 536                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 537                     (cp = strchr(domain, '.'))) {
 538                         domain[MAXHOSTNAMELEN] = '\0';
 539                         (void)strcpy(domain, cp + 1);
 540                 } else
 541                         domain[0] = '\0';
 542         }
 543
 544         /* If the address is zero-filled, use "default". */
 545         if (sa->sa_len == 0 && nflag == 0)
 546                 return ("default");
 547 #if defined(INET) || defined(INET6)
 548         switch (sa->sa_family) {
 549 #ifdef INET
 550         case AF_INET:
 551                 /* If the address is zero-filled, use "default". */
 552                 if (nflag == 0 &&
 553                     ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr ==
 554                     INADDR_ANY)
 555                         return("default");
 556                 break;
 557 #endif
 558 #ifdef INET6
 559         case AF_INET6:
 560                 /* If the address is zero-filled, use "default". */
 561                 if (nflag == 0 &&
 562                     IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr))
 563                         return("default");
 564                 break;
 565 #endif
 566         }
 567 #endif
 568
 569         switch (sa->sa_family) {
 570 #if defined(INET) || defined(INET6)
 571 #ifdef INET
 572         case AF_INET:
 573 #endif
 574 #ifdef INET6
 575         case AF_INET6:
 576 #endif
 577         {
 578                 struct sockaddr_storage ss;
 579                 int error;
 580                 char *p;
 581
 582                 memset(&ss, 0, sizeof(ss));
 583                 if (sa->sa_len == 0)
 584                         ss.ss_family = sa->sa_family;
 585                 else
 586                         memcpy(&ss, sa, sa->sa_len);
 587                 /* Expand sa->sa_len because it could be shortened. */
 588                 if (sa->sa_family == AF_INET)
 589                         ss.ss_len = sizeof(struct sockaddr_in);
 590                 else if (sa->sa_family == AF_INET6)
 591                         ss.ss_len = sizeof(struct sockaddr_in6);
 592                 error = getnameinfo((struct sockaddr *)&ss, ss.ss_len,
 593                     rt_line, sizeof(rt_line), NULL, 0,
 594                     (nflag == 0) ? 0 : NI_NUMERICHOST);
 595                 if (error) {
 596                         warnx("getnameinfo(): %s", gai_strerror(error));
 597                         strncpy(rt_line, "invalid", sizeof(rt_line));
 598                 }
 599
 600                 /* Remove the domain part if any. */
 601                 p = strchr(rt_line, '.');
 602                 if (p != NULL && strcmp(p + 1, domain) == 0)
 603                         *p = '\0';
 604
 605                 return (rt_line);
 606                 break;
 607         }
 608 #endif
 609         case AF_LINK:
 610                 sdl = (struct sockaddr_dl *)(void *)sa;
 611
 612                 if (sdl->sdl_nlen == 0 &&
 613                     sdl->sdl_alen == 0 &&
 614                     sdl->sdl_slen == 0) {
 615                         n = snprintf(rt_line, sizeof(rt_line), "link#%d",
 616                             sdl->sdl_index);
 617                         if (n > (int)sizeof(rt_line))
 618                             rt_line[0] = '\0';
 619                         return (rt_line);
 620                 } else
 621                         return (link_ntoa(sdl));
 622                 break;
 623
 624         default:
 625             {
 626                 u_short *sp = (u_short *)(void *)sa;
 627                 u_short *splim = sp + ((sa->sa_len + 1) >> 1);
 628                 char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family);
 629                 char *cpe = rt_line + sizeof(rt_line);
 630
 631                 while (++sp < splim && cps < cpe) /* start with sa->sa_data */
 632                         if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0)
 633                                 cps += n;
 634                         else
 635                                 *cps = '\0';
 636                 break;
 637             }
 638         }
 639         return (rt_line);
 640 }
 641
 642 /*
 643  * Return the name of the network whose address is given.
 644  * The address is assumed to be that of a net, not a host.
 645  */
 646 static const char *
 647 netname(struct sockaddr *sa)
 648 {
 649         struct sockaddr_dl *sdl;
 650         int n;
 651 #ifdef INET
 652         struct netent *np = NULL;
 653         const char *cp = NULL;
 654         u_long i;
 655 #endif
 656
 657         switch (sa->sa_family) {
 658 #ifdef INET
 659         case AF_INET:
 660         {
 661                 struct in_addr in;
 662
 663                 in = ((struct sockaddr_in *)(void *)sa)->sin_addr;
 664                 i = in.s_addr = ntohl(in.s_addr);
 665                 if (in.s_addr == 0)
 666                         cp = "default";
 667                 else if (!nflag) {
 668                         np = getnetbyaddr(i, AF_INET);
 669                         if (np != NULL)
 670                                 cp = np->n_name;
 671                 }
 672 #define C(x)    (unsigned)((x) & 0xff)
 673                 if (cp != NULL)
 674                         strncpy(net_line, cp, sizeof(net_line));
 675                 else if ((in.s_addr & 0xffffff) == 0)
 676                         (void)sprintf(net_line, "%u", C(in.s_addr >> 24));
 677                 else if ((in.s_addr & 0xffff) == 0)
 678                         (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24),
 679                             C(in.s_addr >> 16));
 680                 else if ((in.s_addr & 0xff) == 0)
 681                         (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24),
 682                             C(in.s_addr >> 16), C(in.s_addr >> 8));
 683                 else
 684                         (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24),
 685                             C(in.s_addr >> 16), C(in.s_addr >> 8),
 686                             C(in.s_addr));
 687 #undef C
 688                 break;
 689         }
 690 #endif
 691 #ifdef INET6
 692         case AF_INET6:
 693         {
 694                 struct sockaddr_in6 sin6;
 695                 int niflags = 0;
 696
 697                 memset(&sin6, 0, sizeof(sin6));
 698                 memcpy(&sin6, sa, sa->sa_len);
 699                 sin6.sin6_len = sizeof(sin6);
 700                 sin6.sin6_family = AF_INET6;
 701                 if (nflag)
 702                         niflags |= NI_NUMERICHOST;
 703                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 704                     net_line, sizeof(net_line), NULL, 0, niflags) != 0)
 705                         strncpy(net_line, "invalid", sizeof(net_line));
 706
 707                 return(net_line);
 708         }
 709 #endif
 710         case AF_LINK:
 711                 sdl = (struct sockaddr_dl *)(void *)sa;
 712
 713                 if (sdl->sdl_nlen == 0 &&
 714                     sdl->sdl_alen == 0 &&
 715                     sdl->sdl_slen == 0) {
 716                         n = snprintf(net_line, sizeof(net_line), "link#%d",
 717                             sdl->sdl_index);
 718                         if (n > (int)sizeof(net_line))
 719                             net_line[0] = '\0';
 720                         return (net_line);
 721                 } else
 722                         return (link_ntoa(sdl));
 723                 break;
 724
 725         default:
 726             {
 727                 u_short *sp = (u_short *)(void *)sa->sa_data;
 728                 u_short *splim = sp + ((sa->sa_len + 1)>>1);
 729                 char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family);
 730                 char *cpe = net_line + sizeof(net_line);
 731
 732                 while (sp < splim && cps < cpe)
 733                         if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0)
 734                                 cps += n;
 735                         else
 736                                 *cps = '\0';
 737                 break;
 738             }
 739         }
 740         return (net_line);
 741 }
 742
 743 static void
 744 set_metric(char *value, int key)
 745 {
 746         int flag = 0;
 747         char *endptr;
 748         u_long noval, *valp = &noval;
 749
 750         switch (key) {
 751 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break
 752         caseof(K_MTU, RTV_MTU, rmx_mtu);
 753         caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount);
 754         caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire);
 755         caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe);
 756         caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe);
 757         caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh);
 758         caseof(K_RTT, RTV_RTT, rmx_rtt);
 759         caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar);
 760         caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight);
 761         }
 762         rtm_inits |= flag;
 763         if (lockrest || locking)
 764                 rt_metrics.rmx_locks |= flag;
 765         if (locking)
 766                 locking = 0;
 767         errno = 0;
 768         *valp = strtol(value, &endptr, 0);
 769         if (errno == 0 && *endptr != '\0')
 770                 errno = EINVAL;
 771         if (errno)
 772                 err(EX_USAGE, "%s", value);
 773         if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) {
 774                 struct timespec ts;
 775
 776                 clock_gettime(CLOCK_REALTIME_FAST, &ts);
 777                 *valp += ts.tv_sec;
 778         }
 779 }
 780
 781 #define F_ISHOST        0x01
 782 #define F_FORCENET      0x02
 783 #define F_FORCEHOST     0x04
 784 #define F_PROXY         0x08
 785 #define F_INTERFACE     0x10
 786
 787 static void
 788 newroute(int argc, char **argv)
 789 {
 790         struct sigaction sa;
 791         struct hostent *hp;
 792         struct fibl *fl;
 793         char *cmd;
 794         const char *dest, *gateway, *errmsg;
 795         int key, error, flags, nrflags, fibnum;
 796
 797         if (uid != 0 && !debugonly && !tflag)
 798                 errx(EX_NOPERM, "must be root to alter routing table");
 799         dest = NULL;
 800         gateway = NULL;
 801         flags = RTF_STATIC;
 802         nrflags = 0;
 803         hp = NULL;
 804         TAILQ_INIT(&fibl_head);
 805
 806         sigemptyset(&sa.sa_mask);
 807         sa.sa_flags = 0;
 808         sa.sa_handler = stopit;
 809         if (sigaction(SIGALRM, &sa, 0) == -1)
 810                 warn("sigaction SIGALRM");
 811
 812         cmd = argv[0];
 813         if (*cmd != 'g' && *cmd != 's')
 814                 shutdown(s, SHUT_RD); /* Don't want to read back our messages */
 815         while (--argc > 0) {
 816                 if (**(++argv)== '-') {
 817                         switch (key = keyword(1 + *argv)) {
 818                         case K_LINK:
 819                                 af = AF_LINK;
 820                                 aflen = sizeof(struct sockaddr_dl);
 821                                 break;
 822 #ifdef INET
 823                         case K_4:
 824                         case K_INET:
 825                                 af = AF_INET;
 826                                 aflen = sizeof(struct sockaddr_in);
 827                                 break;
 828 #endif
 829 #ifdef INET6
 830                         case K_6:
 831                         case K_INET6:
 832                                 af = AF_INET6;
 833                                 aflen = sizeof(struct sockaddr_in6);
 834                                 break;
 835 #endif
 836                         case K_SA:
 837                                 af = PF_ROUTE;
 838                                 aflen = sizeof(struct sockaddr_storage);
 839                                 break;
 840                         case K_IFACE:
 841                         case K_INTERFACE:
 842                                 nrflags |= F_INTERFACE;
 843                                 break;
 844                         case K_NOSTATIC:
 845                                 flags &= ~RTF_STATIC;
 846                                 break;
 847                         case K_LOCK:
 848                                 locking = 1;
 849                                 break;
 850                         case K_LOCKREST:
 851                                 lockrest = 1;
 852                                 break;
 853                         case K_HOST:
 854                                 nrflags |= F_FORCEHOST;
 855                                 break;
 856                         case K_REJECT:
 857                                 flags |= RTF_REJECT;
 858                                 break;
 859                         case K_BLACKHOLE:
 860                                 flags |= RTF_BLACKHOLE;
 861                                 break;
 862                         case K_PROTO1:
 863                                 flags |= RTF_PROTO1;
 864                                 break;
 865                         case K_PROTO2:
 866                                 flags |= RTF_PROTO2;
 867                                 break;
 868                         case K_PROXY:
 869                                 nrflags |= F_PROXY;
 870                                 break;
 871                         case K_XRESOLVE:
 872                                 flags |= RTF_XRESOLVE;
 873                                 break;
 874                         case K_STATIC:
 875                                 flags |= RTF_STATIC;
 876                                 break;
 877                         case K_STICKY:
 878                                 flags |= RTF_STICKY;
 879                                 break;
 880                         case K_NOSTICK:
 881                                 flags &= ~RTF_STICKY;
 882                                 break;
 883                         case K_FIB:
 884                                 if (!--argc)
 885                                         usage(NULL);
 886                                 error = fiboptlist_csv(*++argv, &fibl_head);
 887                                 if (error)
 888                                         errx(EX_USAGE,
 889                                             "invalid fib number: %s", *argv);
 890                                 break;
 891                         case K_IFA:
 892                                 if (!--argc)
 893                                         usage(NULL);
 894                                 getaddr(RTAX_IFA, *++argv, 0, nrflags);
 895                                 break;
 896                         case K_IFP:
 897                                 if (!--argc)
 898                                         usage(NULL);
 899                                 getaddr(RTAX_IFP, *++argv, 0, nrflags);
 900                                 break;
 901                         case K_GENMASK:
 902                                 if (!--argc)
 903                                         usage(NULL);
 904                                 getaddr(RTAX_GENMASK, *++argv, 0, nrflags);
 905                                 break;
 906                         case K_GATEWAY:
 907                                 if (!--argc)
 908                                         usage(NULL);
 909                                 getaddr(RTAX_GATEWAY, *++argv, 0, nrflags);
 910                                 gateway = *argv;
 911                                 break;
 912                         case K_DST:
 913                                 if (!--argc)
 914                                         usage(NULL);
 915                                 if (getaddr(RTAX_DST, *++argv, &hp, nrflags))
 916                                         nrflags |= F_ISHOST;
 917                                 dest = *argv;
 918                                 break;
 919                         case K_NETMASK:
 920                                 if (!--argc)
 921                                         usage(NULL);
 922                                 getaddr(RTAX_NETMASK, *++argv, 0, nrflags);
 923                                 /* FALLTHROUGH */
 924                         case K_NET:
 925                                 nrflags |= F_FORCENET;
 926                                 break;
 927                         case K_PREFIXLEN:
 928                                 if (!--argc)
 929                                         usage(NULL);
 930                                 if (prefixlen(*++argv) == -1) {
 931                                         nrflags &= ~F_FORCENET;
 932                                         nrflags |= F_ISHOST;
 933                                 } else {
 934                                         nrflags |= F_FORCENET;
 935                                         nrflags &= ~F_ISHOST;
 936                                 }
 937                                 break;
 938                         case K_MTU:
 939                         case K_HOPCOUNT:
 940                         case K_EXPIRE:
 941                         case K_RECVPIPE:
 942                         case K_SENDPIPE:
 943                         case K_SSTHRESH:
 944                         case K_RTT:
 945                         case K_RTTVAR:
 946                         case K_WEIGHT:
 947                                 if (!--argc)
 948                                         usage(NULL);
 949                                 set_metric(*++argv, key);
 950                                 break;
 951                         default:
 952                                 usage(1+*argv);
 953                         }
 954                 } else {
 955                         if ((rtm_addrs & RTA_DST) == 0) {
 956                                 dest = *argv;
 957                                 if (getaddr(RTAX_DST, *argv, &hp, nrflags))
 958                                         nrflags |= F_ISHOST;
 959                         } else if ((rtm_addrs & RTA_GATEWAY) == 0) {
 960                                 gateway = *argv;
 961                                 getaddr(RTAX_GATEWAY, *argv, &hp, nrflags);
 962                         } else {
 963                                 getaddr(RTAX_NETMASK, *argv, 0, nrflags);
 964                                 nrflags |= F_FORCENET;
 965                         }
 966                 }
 967         }
 968
 969         /* Do some sanity checks on resulting request */
 970         if (so[RTAX_DST].ss_len == 0) {
 971                 warnx("destination parameter required");
 972                 usage(NULL);
 973         }
 974
 975         if (so[RTAX_NETMASK].ss_len != 0 &&
 976             so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) {
 977                 warnx("destination and netmask family need to be the same");
 978                 usage(NULL);
 979         }
 980
 981         if (nrflags & F_FORCEHOST) {
 982                 nrflags |= F_ISHOST;
 983 #ifdef INET6
 984                 if (af == AF_INET6) {
 985                         rtm_addrs &= ~RTA_NETMASK;
 986                         memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK]));
 987                 }
 988 #endif
 989         }
 990         if (nrflags & F_FORCENET)
 991                 nrflags &= ~F_ISHOST;
 992         flags |= RTF_UP;
 993         if (nrflags & F_ISHOST)
 994                 flags |= RTF_HOST;
 995         if ((nrflags & F_INTERFACE) == 0)
 996                 flags |= RTF_GATEWAY;
 997         if (nrflags & F_PROXY)
 998                 flags |= RTF_ANNOUNCE;
 999         if (dest == NULL)
1000                 dest = "";
1001         if (gateway == NULL)
1002                 gateway = "";
1003
1004         if (TAILQ_EMPTY(&fibl_head)) {
1005                 error = fiboptlist_csv("default", &fibl_head);
1006                 if (error)
1007                         errx(EX_OSERR, "fiboptlist_csv failed.");
1008         }
1009         error = 0;
1010         TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1011                 fl->fl_error = newroute_fib(fl->fl_num, cmd, flags);
1012                 if (fl->fl_error)
1013                         fl->fl_errno = errno;
1014                 error += fl->fl_error;
1015         }
1016         if (*cmd == 'g' || *cmd == 's')
1017                 exit(error);
1018
1019         error = 0;
1020         if (!qflag) {
1021                 fibnum = 0;
1022                 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1023                         if (fl->fl_error == 0)
1024                                 fibnum++;
1025                 }
1026                 if (fibnum > 0) {
1027                         int firstfib = 1;
1028
1029                         printf("%s %s %s", cmd,
1030                             (nrflags & F_ISHOST) ? "host" : "net", dest);
1031                         if (*gateway)
1032                                 printf(": gateway %s", gateway);
1033
1034                         if (numfibs > 1) {
1035                                 TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1036                                         if (fl->fl_error == 0
1037                                             && fl->fl_num >= 0) {
1038                                                 if (firstfib) {
1039                                                         printf(" fib ");
1040                                                         firstfib = 0;
1041                                                 }
1042                                                 printf("%d", fl->fl_num);
1043                                                 if (fibnum-- > 1)
1044                                                         printf(",");
1045                                         }
1046                                 }
1047                         }
1048                         printf("\n");
1049                 }
1050         }
1051
1052         fibnum = 0;
1053         TAILQ_FOREACH(fl, &fibl_head, fl_next) {
1054                 if (fl->fl_error != 0) {
1055                         error = 1;
1056                         if (!qflag) {
1057                                 printf("%s %s %s", cmd, (nrflags & F_ISHOST)
1058                                     ? "host" : "net", dest);
1059                                 if (*gateway)
1060                                         printf(": gateway %s", gateway);
1061
1062                                 if (fl->fl_num >= 0)
1063                                         printf(" fib %d", fl->fl_num);
1064
1065                                 switch (fl->fl_errno) {
1066                                 case ESRCH:
1067                                         errmsg = "not in table";
1068                                         break;
1069                                 case EBUSY:
1070                                         errmsg = "entry in use";
1071                                         break;
1072                                 case ENOBUFS:
1073                                         errmsg = "not enough memory";
1074                                         break;
1075                                 case EADDRINUSE:
1076                                         /*
1077                                          * handle recursion avoidance
1078                                          * in rt_setgate()
1079                                          */
1080                                         errmsg = "gateway uses the same route";
1081                                         break;
1082                                 case EEXIST:
1083                                         errmsg = "route already in table";
1084                                         break;
1085                                 default:
1086                                         errmsg = strerror(fl->fl_errno);
1087                                         break;
1088                                 }
1089                                 printf(": %s\n", errmsg);
1090                         }
1091                 }
1092         }
1093         exit(error);
1094 }
1095
1096 static int
1097 newroute_fib(int fib, char *cmd, int flags)
1098 {
1099         int error;
1100
1101         error = set_sofib(fib);
1102         if (error) {
1103                 warn("fib number %d is ignored", fib);
1104                 return (error);
1105         }
1106
1107         error = rtmsg(*cmd, flags, fib);
1108         return (error);
1109 }
1110
1111 #ifdef INET
1112 static void
1113 inet_makenetandmask(u_long net, struct sockaddr_in *sin,
1114     struct sockaddr_in *sin_mask, u_long bits)
1115 {
1116         u_long mask = 0;
1117
1118         rtm_addrs |= RTA_NETMASK;
1119
1120         /*
1121          * MSB of net should be meaningful. 0/0 is exception.
1122          */
1123         if (net > 0)
1124                 while ((net & 0xff000000) == 0)
1125                         net <<= 8;
1126
1127         /*
1128          * If no /xx was specified we must calculate the
1129          * CIDR address.
1130          */
1131         if ((bits == 0) && (net != 0)) {
1132                 u_long i, j;
1133
1134                 for(i = 0, j = 0xff; i < 4; i++)  {
1135                         if (net & j) {
1136                                 break;
1137                         }
1138                         j <<= 8;
1139                 }
1140                 /* i holds the first non zero bit */
1141                 bits = 32 - (i*8);
1142         }
1143         if (bits != 0)
1144                 mask = 0xffffffff << (32 - bits);
1145
1146         sin->sin_addr.s_addr = htonl(net);
1147         sin_mask->sin_addr.s_addr = htonl(mask);
1148         sin_mask->sin_len = sizeof(struct sockaddr_in);
1149         sin_mask->sin_family = AF_INET;
1150 }
1151 #endif
1152
1153 #ifdef INET6
1154 /*
1155  * XXX the function may need more improvement...
1156  */
1157 static int
1158 inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen)
1159 {
1160
1161         if (plen == NULL) {
1162                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
1163                     sin6->sin6_scope_id == 0)
1164                         plen = "0";
1165         }
1166
1167         if (plen == NULL || strcmp(plen, "128") == 0)
1168                 return (1);
1169         rtm_addrs |= RTA_NETMASK;
1170         prefixlen(plen);
1171         return (0);
1172 }
1173 #endif
1174
1175 /*
1176  * Interpret an argument as a network address of some kind,
1177  * returning 1 if a host address, 0 if a network address.
1178  */
1179 static int
1180 getaddr(int idx, char *str, struct hostent **hpp, int nrflags)
1181 {
1182         struct sockaddr *sa;
1183 #if defined(INET)
1184         struct sockaddr_in *sin;
1185         struct hostent *hp;
1186         struct netent *np;
1187         u_long val;
1188         char *q;
1189 #elif defined(INET6)
1190         char *q;
1191 #endif
1192
1193         if (idx < 0 || idx >= RTAX_MAX)
1194                 usage("internal error");
1195         if (af == 0) {
1196 #if defined(INET)
1197                 af = AF_INET;
1198                 aflen = sizeof(struct sockaddr_in);
1199 #elif defined(INET6)
1200                 af = AF_INET6;
1201                 aflen = sizeof(struct sockaddr_in6);
1202 #else
1203                 af = AF_LINK;
1204                 aflen = sizeof(struct sockaddr_dl);
1205 #endif
1206         }
1207 #ifndef INET
1208         hpp = NULL;
1209 #endif
1210         rtm_addrs |= (1 << idx);
1211         sa = (struct sockaddr *)&so[idx];
1212         sa->sa_family = af;
1213         sa->sa_len = aflen;
1214
1215         switch (idx) {
1216         case RTAX_GATEWAY:
1217                 if (nrflags & F_INTERFACE) {
1218                         struct ifaddrs *ifap, *ifa;
1219                         struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa;
1220                         struct sockaddr_dl *sdl = NULL;
1221
1222                         if (getifaddrs(&ifap))
1223                                 err(EX_OSERR, "getifaddrs");
1224
1225                         for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
1226                                 if (ifa->ifa_addr->sa_family != AF_LINK)
1227                                         continue;
1228
1229                                 if (strcmp(str, ifa->ifa_name) != 0)
1230                                         continue;
1231
1232                                 sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr;
1233                         }
1234                         /* If we found it, then use it */
1235                         if (sdl != NULL) {
1236                                 /*
1237                                  * Note that we need to copy before calling
1238                                  * freeifaddrs().
1239                                  */
1240                                 memcpy(sdl0, sdl, sdl->sdl_len);
1241                         }
1242                         freeifaddrs(ifap);
1243                         if (sdl != NULL)
1244                                 return(1);
1245                         else
1246                                 errx(EX_DATAERR,
1247                                     "interface '%s' does not exist", str);
1248                 }
1249                 break;
1250         case RTAX_IFP:
1251                 sa->sa_family = AF_LINK;
1252                 break;
1253         }
1254         if (strcmp(str, "default") == 0) {
1255                 /*
1256                  * Default is net 0.0.0.0/0
1257                  */
1258                 switch (idx) {
1259                 case RTAX_DST:
1260                         nrflags |= F_FORCENET;
1261                         getaddr(RTAX_NETMASK, str, 0, nrflags);
1262                         break;
1263                 }
1264                 return (0);
1265         }
1266         switch (sa->sa_family) {
1267 #ifdef INET6
1268         case AF_INET6:
1269         {
1270                 struct addrinfo hints, *res;
1271                 int ecode;
1272
1273                 q = NULL;
1274                 if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL)
1275                         *q = '\0';
1276                 memset(&hints, 0, sizeof(hints));
1277                 hints.ai_family = sa->sa_family;
1278                 hints.ai_socktype = SOCK_DGRAM;
1279                 ecode = getaddrinfo(str, NULL, &hints, &res);
1280                 if (ecode != 0 || res->ai_family != AF_INET6 ||
1281                     res->ai_addrlen != sizeof(struct sockaddr_in6))
1282                         errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode));
1283                 memcpy(sa, res->ai_addr, res->ai_addrlen);
1284                 freeaddrinfo(res);
1285                 if (q != NULL)
1286                         *q++ = '/';
1287                 if (idx == RTAX_DST)
1288                         return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q));
1289                 return (0);
1290         }
1291 #endif /* INET6 */
1292         case AF_LINK:
1293                 link_addr(str, (struct sockaddr_dl *)(void *)sa);
1294                 return (1);
1295
1296         case PF_ROUTE:
1297                 sockaddr(str, sa, sizeof(struct sockaddr_storage));
1298                 return (1);
1299 #ifdef INET
1300         case AF_INET:
1301 #endif
1302         default:
1303                 break;
1304         }
1305
1306 #ifdef INET
1307         sin = (struct sockaddr_in *)(void *)sa;
1308         if (hpp == NULL)
1309                 hpp = &hp;
1310         *hpp = NULL;
1311
1312         q = strchr(str,'/');
1313         if (q != NULL && idx == RTAX_DST) {
1314                 *q = '\0';
1315                 if ((val = inet_network(str)) != INADDR_NONE) {
1316                         inet_makenetandmask(val, sin,
1317                             (struct sockaddr_in *)&so[RTAX_NETMASK],
1318                             strtoul(q+1, 0, 0));
1319                         return (0);
1320                 }
1321                 *q = '/';
1322         }
1323         if ((idx != RTAX_DST || (nrflags & F_FORCENET) == 0) &&
1324             inet_aton(str, &sin->sin_addr)) {
1325                 val = sin->sin_addr.s_addr;
1326                 if (idx != RTAX_DST || nrflags & F_FORCEHOST ||
1327                     inet_lnaof(sin->sin_addr) != INADDR_ANY)
1328                         return (1);
1329                 else {
1330                         val = ntohl(val);
1331                         goto netdone;
1332                 }
1333         }
1334         if (idx == RTAX_DST && (nrflags & F_FORCEHOST) == 0 &&
1335             ((val = inet_network(str)) != INADDR_NONE ||
1336             ((np = getnetbyname(str)) != NULL && (val = np->n_net) != 0))) {
1337 netdone:
1338                 inet_makenetandmask(val, sin,
1339                     (struct sockaddr_in *)&so[RTAX_NETMASK], 0);
1340                 return (0);
1341         }
1342         hp = gethostbyname(str);
1343         if (hp != NULL) {
1344                 *hpp = hp;
1345                 sin->sin_family = hp->h_addrtype;
1346                 memmove((char *)&sin->sin_addr, hp->h_addr,
1347                     MIN((size_t)hp->h_length, sizeof(sin->sin_addr)));
1348                 return (1);
1349         }
1350 #endif
1351         errx(EX_NOHOST, "bad address: %s", str);
1352 }
1353
1354 static int
1355 prefixlen(const char *str)
1356 {
1357         int len = atoi(str), q, r;
1358         int max;
1359         char *p;
1360
1361         rtm_addrs |= RTA_NETMASK;
1362         switch (af) {
1363 #ifdef INET6
1364         case AF_INET6:
1365         {
1366                 struct sockaddr_in6 *sin6 =
1367                     (struct sockaddr_in6 *)&so[RTAX_NETMASK];
1368
1369                 max = 128;
1370                 p = (char *)&sin6->sin6_addr;
1371                 sin6->sin6_family = AF_INET6;
1372                 sin6->sin6_len = sizeof(*sin6);
1373                 break;
1374         }
1375 #endif
1376 #ifdef INET
1377         case AF_INET:
1378         {
1379                 struct sockaddr_in *sin =
1380                     (struct sockaddr_in *)&so[RTAX_NETMASK];
1381
1382                 max = 32;
1383                 p = (char *)&sin->sin_addr;
1384                 sin->sin_family = AF_INET;
1385                 sin->sin_len = sizeof(*sin);
1386                 break;
1387         }
1388 #endif
1389         default:
1390                 errx(EX_OSERR, "prefixlen not supported in this af");
1391         }
1392
1393         if (len < 0 || max < len)
1394                 errx(EX_USAGE, "%s: invalid prefixlen", str);
1395
1396         q = len >> 3;
1397         r = len & 7;
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] = AF_UNSPEC;
1422         mib[4] = NET_RT_IFLIST;
1423         mib[5] = 0;             /* no flags */
1424         if (sysctl(mib, nitems(mib), 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, nitems(mib), 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 *)(void *)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 *)(void *)msg, n);
1490         }
1491 }
1492
1493 static int
1494 rtmsg(int cmd, int flags, int fib)
1495 {
1496         int rlen;
1497         char *cp = m_rtmsg.m_space;
1498         int l;
1499
1500 #define NEXTADDR(w, u)                                                  \
1501         if (rtm_addrs & (w)) {                                          \
1502                 l = (((struct sockaddr *)&(u))->sa_len == 0) ?          \
1503                     sizeof(long) :                                      \
1504                     1 + ((((struct sockaddr *)&(u))->sa_len - 1)        \
1505                         | (sizeof(long) - 1));                          \
1506                 memmove(cp, (char *)&(u), l);                           \
1507                 cp += l;                                                \
1508                 if (verbose)                                            \
1509                         sodump((struct sockaddr *)&(u), #w);            \
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[RTAX_IFP].ss_family == 0) {
1521                         so[RTAX_IFP].ss_family = AF_LINK;
1522                         so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl);
1523                         rtm_addrs |= RTA_IFP;
1524                 }
1525         } else {
1526                 cmd = RTM_DELETE;
1527                 flags |= RTF_PINNED;
1528         }
1529 #define rtm m_rtmsg.m_rtm
1530         rtm.rtm_type = cmd;
1531         rtm.rtm_flags = flags;
1532         rtm.rtm_version = RTM_VERSION;
1533         rtm.rtm_seq = ++rtm_seq;
1534         rtm.rtm_addrs = rtm_addrs;
1535         rtm.rtm_rmx = rt_metrics;
1536         rtm.rtm_inits = rtm_inits;
1537
1538         NEXTADDR(RTA_DST, so[RTAX_DST]);
1539         NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]);
1540         NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]);
1541         NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]);
1542         NEXTADDR(RTA_IFP, so[RTAX_IFP]);
1543         NEXTADDR(RTA_IFA, so[RTAX_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                 switch (errno) {
1551                 case EPERM:
1552                         err(1, "writing to routing socket");
1553                         break;
1554                 case ESRCH:
1555                         warnx("route has not been found");
1556                         break;
1557                 case EEXIST:
1558                         /* Handled by newroute() */
1559                         break;
1560                 default:
1561                         warn("writing to routing socket");
1562                 }
1563                 return (-1);
1564         }
1565         if (cmd == RTM_GET) {
1566                 stop_read = 0;
1567                 alarm(READ_TIMEOUT);
1568                 do {
1569                         l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1570                 } while (l > 0 && stop_read == 0 &&
1571                     (rtm.rtm_seq != rtm_seq || rtm.rtm_pid != pid));
1572                 if (stop_read != 0) {
1573                         warnx("read from routing socket timed out");
1574                         return (-1);
1575                 } else
1576                         alarm(0);
1577                 if (l < 0)
1578                         warn("read from routing socket");
1579                 else
1580                         print_getmsg(&rtm, l, fib);
1581         }
1582 #undef rtm
1583         return (0);
1584 }
1585
1586 static const char *const msgtypes[] = {
1587         "",
1588         "RTM_ADD: Add Route",
1589         "RTM_DELETE: Delete Route",
1590         "RTM_CHANGE: Change Metrics or flags",
1591         "RTM_GET: Report Metrics",
1592         "RTM_LOSING: Kernel Suspects Partitioning",
1593         "RTM_REDIRECT: Told to use different route",
1594         "RTM_MISS: Lookup failed on this address",
1595         "RTM_LOCK: fix specified metrics",
1596         "RTM_OLDADD: caused by SIOCADDRT",
1597         "RTM_OLDDEL: caused by SIOCDELRT",
1598         "RTM_RESOLVE: Route created by cloning",
1599         "RTM_NEWADDR: address being added to iface",
1600         "RTM_DELADDR: address being removed from iface",
1601         "RTM_IFINFO: iface status change",
1602         "RTM_NEWMADDR: new multicast group membership on iface",
1603         "RTM_DELMADDR: multicast group membership removed from iface",
1604         "RTM_IFANNOUNCE: interface arrival/departure",
1605         "RTM_IEEE80211: IEEE 802.11 wireless event",
1606 };
1607
1608 static const char metricnames[] =
1609     "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire"
1610     "\1mtu";
1611 static const char routeflags[] =
1612     "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE"
1613     "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE"
1614     "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3"
1615     "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY";
1616 static const char ifnetflags[] =
1617     "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
1618     "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
1619     "\017LINK2\020MULTICAST";
1620 static const char addrnames[] =
1621     "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
1622
1623 static const char errfmt[] =
1624     "\n%s: truncated route message, only %zu bytes left\n";
1625
1626 static void
1627 print_rtmsg(struct rt_msghdr *rtm, size_t msglen)
1628 {
1629         struct if_msghdr *ifm;
1630         struct ifa_msghdr *ifam;
1631 #ifdef RTM_NEWMADDR
1632         struct ifma_msghdr *ifmam;
1633 #endif
1634         struct if_announcemsghdr *ifan;
1635         const char *state;
1636
1637         if (verbose == 0)
1638                 return;
1639         if (rtm->rtm_version != RTM_VERSION) {
1640                 (void)printf("routing message version %d not understood\n",
1641                     rtm->rtm_version);
1642                 return;
1643         }
1644         if (rtm->rtm_type < nitems(msgtypes))
1645                 (void)printf("%s: ", msgtypes[rtm->rtm_type]);
1646         else
1647                 (void)printf("unknown type %d: ", rtm->rtm_type);
1648         (void)printf("len %d, ", rtm->rtm_msglen);
1649
1650 #define REQUIRE(x)      do {            \
1651         if (msglen < sizeof(x))         \
1652                 goto badlen;            \
1653         else                            \
1654                 msglen -= sizeof(x);    \
1655         } while (0)
1656
1657         switch (rtm->rtm_type) {
1658         case RTM_IFINFO:
1659                 REQUIRE(struct if_msghdr);
1660                 ifm = (struct if_msghdr *)rtm;
1661                 (void)printf("if# %d, ", ifm->ifm_index);
1662                 switch (ifm->ifm_data.ifi_link_state) {
1663                 case LINK_STATE_DOWN:
1664                         state = "down";
1665                         break;
1666                 case LINK_STATE_UP:
1667                         state = "up";
1668                         break;
1669                 default:
1670                         state = "unknown";
1671                         break;
1672                 }
1673                 (void)printf("link: %s, flags:", state);
1674                 printb(ifm->ifm_flags, ifnetflags);
1675                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen);
1676                 break;
1677         case RTM_NEWADDR:
1678         case RTM_DELADDR:
1679                 REQUIRE(struct ifa_msghdr);
1680                 ifam = (struct ifa_msghdr *)rtm;
1681                 (void)printf("metric %d, flags:", ifam->ifam_metric);
1682                 printb(ifam->ifam_flags, routeflags);
1683                 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen);
1684                 break;
1685 #ifdef RTM_NEWMADDR
1686         case RTM_NEWMADDR:
1687         case RTM_DELMADDR:
1688                 REQUIRE(struct ifma_msghdr);
1689                 ifmam = (struct ifma_msghdr *)rtm;
1690                 pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen);
1691                 break;
1692 #endif
1693         case RTM_IFANNOUNCE:
1694                 REQUIRE(struct if_announcemsghdr);
1695                 ifan = (struct if_announcemsghdr *)rtm;
1696                 (void)printf("if# %d, what: ", ifan->ifan_index);
1697                 switch (ifan->ifan_what) {
1698                 case IFAN_ARRIVAL:
1699                         (void)printf("arrival");
1700                         break;
1701                 case IFAN_DEPARTURE:
1702                         printf("departure");
1703                         break;
1704                 default:
1705                         printf("#%d", ifan->ifan_what);
1706                         break;
1707                 }
1708                 printf("\n");
1709                 fflush(stdout);
1710                 break;
1711
1712         default:
1713                 printf("pid: %ld, seq %d, errno %d, flags:",
1714                         (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno);
1715                 printb(rtm->rtm_flags, routeflags);
1716                 pmsg_common(rtm, msglen);
1717         }
1718
1719         return;
1720
1721 badlen:
1722         (void)printf(errfmt, __func__, msglen);
1723 #undef  REQUIRE
1724 }
1725
1726 static void
1727 print_getmsg(struct rt_msghdr *rtm, int msglen, int fib)
1728 {
1729         struct sockaddr *sp[RTAX_MAX];
1730         struct timespec ts;
1731         char *cp;
1732         int i;
1733
1734         memset(sp, 0, sizeof(sp));
1735         (void)printf("   route to: %s\n",
1736             routename((struct sockaddr *)&so[RTAX_DST]));
1737         if (rtm->rtm_version != RTM_VERSION) {
1738                 warnx("routing message version %d not understood",
1739                      rtm->rtm_version);
1740                 return;
1741         }
1742         if (rtm->rtm_msglen > msglen) {
1743                 warnx("message length mismatch, in packet %d, returned %d",
1744                       rtm->rtm_msglen, msglen);
1745                 return;
1746         }
1747         if (rtm->rtm_errno)  {
1748                 errno = rtm->rtm_errno;
1749                 warn("message indicates error %d", errno);
1750                 return;
1751         }
1752         cp = ((char *)(rtm + 1));
1753         for (i = 0; i < RTAX_MAX; i++)
1754                 if (rtm->rtm_addrs & (1 << i)) {
1755                         sp[i] = (struct sockaddr *)cp;
1756                         cp += SA_SIZE((struct sockaddr *)cp);
1757                 }
1758         if ((rtm->rtm_addrs & RTA_IFP) &&
1759             (sp[RTAX_IFP]->sa_family != AF_LINK ||
1760              ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0))
1761                         sp[RTAX_IFP] = NULL;
1762         if (sp[RTAX_DST])
1763                 (void)printf("destination: %s\n", routename(sp[RTAX_DST]));
1764         if (sp[RTAX_NETMASK])
1765                 (void)printf("       mask: %s\n", routename(sp[RTAX_NETMASK]));
1766         if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY))
1767                 (void)printf("    gateway: %s\n", routename(sp[RTAX_GATEWAY]));
1768         if (fib >= 0)
1769                 (void)printf("        fib: %u\n", (unsigned int)fib);
1770         if (sp[RTAX_IFP])
1771                 (void)printf("  interface: %.*s\n",
1772                     ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen,
1773                     ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data);
1774         (void)printf("      flags: ");
1775         printb(rtm->rtm_flags, routeflags);
1776
1777 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ')
1778 #define msec(u) (((u) + 500) / 1000)            /* usec to msec */
1779         printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe",
1780             "sendpipe", "ssthresh", "rtt,msec", "mtu   ", "weight", "expire");
1781         printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE));
1782         printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE));
1783         printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH));
1784         printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT));
1785         printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU));
1786         printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT));
1787         if (rtm->rtm_rmx.rmx_expire > 0)
1788                 clock_gettime(CLOCK_REALTIME_FAST, &ts);
1789         else
1790                 ts.tv_sec = 0;
1791         printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec),
1792             lock(EXPIRE));
1793 #undef lock
1794 #undef msec
1795 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD)
1796         if (verbose)
1797                 pmsg_common(rtm, msglen);
1798         else if (rtm->rtm_addrs &~ RTA_IGN) {
1799                 (void)printf("sockaddrs: ");
1800                 printb(rtm->rtm_addrs, addrnames);
1801                 putchar('\n');
1802         }
1803 #undef  RTA_IGN
1804 }
1805
1806 static void
1807 pmsg_common(struct rt_msghdr *rtm, size_t msglen)
1808 {
1809
1810         (void)printf("\nlocks: ");
1811         printb(rtm->rtm_rmx.rmx_locks, metricnames);
1812         (void)printf(" inits: ");
1813         printb(rtm->rtm_inits, metricnames);
1814         if (msglen > sizeof(struct rt_msghdr))
1815                 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs,
1816                     msglen - sizeof(struct rt_msghdr));
1817         else
1818                 (void)fflush(stdout);
1819 }
1820
1821 static void
1822 pmsg_addrs(char *cp, int addrs, size_t len)
1823 {
1824         struct sockaddr *sa;
1825         int i;
1826
1827         if (addrs == 0) {
1828                 (void)putchar('\n');
1829                 return;
1830         }
1831         (void)printf("\nsockaddrs: ");
1832         printb(addrs, addrnames);
1833         putchar('\n');
1834         for (i = 0; i < RTAX_MAX; i++)
1835                 if (addrs & (1 << i)) {
1836                         sa = (struct sockaddr *)cp;
1837                         if (len == 0 || len < SA_SIZE(sa)) {
1838                                 (void)printf(errfmt, __func__, len);
1839                                 break;
1840                         }
1841                         (void)printf(" %s", routename(sa));
1842                         len -= SA_SIZE(sa);
1843                         cp += SA_SIZE(sa);
1844                 }
1845         (void)putchar('\n');
1846         (void)fflush(stdout);
1847 }
1848
1849 static void
1850 printb(int b, const char *str)
1851 {
1852         int i;
1853         int gotsome = 0;
1854
1855         if (b == 0)
1856                 return;
1857         while ((i = *str++) != 0) {
1858                 if (b & (1 << (i-1))) {
1859                         if (gotsome == 0)
1860                                 i = '<';
1861                         else
1862                                 i = ',';
1863                         putchar(i);
1864                         gotsome = 1;
1865                         for (; (i = *str) > 32; str++)
1866                                 putchar(i);
1867                 } else
1868                         while (*str > 32)
1869                                 str++;
1870         }
1871         if (gotsome)
1872                 putchar('>');
1873 }
1874
1875 int
1876 keyword(const char *cp)
1877 {
1878         const struct keytab *kt = keywords;
1879
1880         while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0)
1881                 kt++;
1882         return (kt->kt_i);
1883 }
1884
1885 static void
1886 sodump(struct sockaddr *sa, const char *which)
1887 {
1888 #ifdef INET6
1889         char nbuf[INET6_ADDRSTRLEN];
1890 #endif
1891
1892         switch (sa->sa_family) {
1893         case AF_LINK:
1894                 (void)printf("%s: link %s; ", which,
1895                     link_ntoa((struct sockaddr_dl *)(void *)sa));
1896                 break;
1897 #ifdef INET
1898         case AF_INET:
1899                 (void)printf("%s: inet %s; ", which,
1900                     inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr));
1901                 break;
1902 #endif
1903 #ifdef INET6
1904         case AF_INET6:
1905                 (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family,
1906                     &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf,
1907                     sizeof(nbuf)));
1908                 break;
1909 #endif
1910         }
1911         (void)fflush(stdout);
1912 }
1913
1914 /* States*/
1915 #define VIRGIN  0
1916 #define GOTONE  1
1917 #define GOTTWO  2
1918 /* Inputs */
1919 #define DIGIT   (4*0)
1920 #define END     (4*1)
1921 #define DELIM   (4*2)
1922
1923 static void
1924 sockaddr(char *addr, struct sockaddr *sa, size_t size)
1925 {
1926         char *cp = (char *)sa;
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 }