ifconfig.tproj/ifconfig.c

   1 /*
   2  * Copyright (c) 1983, 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, 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[] = "@(#)ifconfig.c  8.2 (Berkeley) 2/16/94";
  39 #endif
  40 static const char rcsid[] =
  41   "$FreeBSD: src/sbin/ifconfig/ifconfig.c,v 1.134.2.2.2.1 2008/11/25 02:59:29 kensmith Exp $";
  42 #endif /* not lint */
  43
  44 #include <sys/param.h>
  45 #include <sys/ioctl.h>
  46 #include <sys/socket.h>
  47 #include <sys/sysctl.h>
  48 #include <sys/time.h>
  49 #ifndef __APPLE__
  50 #include <sys/module.h>
  51 #include <sys/linker.h>
  52 #endif
  53
  54 #include <net/ethernet.h>
  55 #include <net/if.h>
  56 #include <net/if_var.h>
  57 #include <net/if_dl.h>
  58 #include <net/if_types.h>
  59 #include <net/route.h>
  60
  61 /* IP */
  62 #include <netinet/in.h>
  63 #include <netinet/in_var.h>
  64 #include <arpa/inet.h>
  65 #include <netdb.h>
  66
  67 #include <ifaddrs.h>
  68 #include <ctype.h>
  69 #include <err.h>
  70 #include <errno.h>
  71 #include <fcntl.h>
  72 #include <stdio.h>
  73 #include <stdlib.h>
  74 #include <string.h>
  75 #include <unistd.h>
  76
  77 #include "ifconfig.h"
  78
  79 /*
  80  * Since "struct ifreq" is composed of various union members, callers
  81  * should pay special attention to interprete the value.
  82  * (.e.g. little/big endian difference in the structure.)
  83  */
  84 struct  ifreq ifr;
  85
  86 char    name[IFNAMSIZ];
  87 int     setaddr;
  88 int     setmask;
  89 int     doalias;
  90 int     clearaddr;
  91 int     newaddr = 1;
  92 int     verbose;
  93 int     noload;
  94 int all;
  95
  96 int bond_details = 0;
  97 int     supmedia = 0;
  98 int     showrtref = 0;
  99 int     printkeys = 0;          /* Print keying material for interfaces. */
 100
 101 static  int ifconfig(int argc, char *const *argv, int iscreate,
 102                 const struct afswtch *afp);
 103 static  void status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
 104                 struct ifaddrs *ifa);
 105 static  void tunnel_status(int s);
 106 static  void usage(void);
 107
 108 static struct afswtch *af_getbyname(const char *name);
 109 static struct afswtch *af_getbyfamily(int af);
 110 static void af_other_status(int);
 111
 112 static struct option *opts = NULL;
 113
 114 void
 115 opt_register(struct option *p)
 116 {
 117         p->next = opts;
 118         opts = p;
 119 }
 120
 121 static void
 122 usage(void)
 123 {
 124         char options[1024];
 125         struct option *p;
 126
 127         /* XXX not right but close enough for now */
 128         options[0] = '\0';
 129         for (p = opts; p != NULL; p = p->next) {
 130                 strlcat(options, p->opt_usage, sizeof(options));
 131                 strlcat(options, " ", sizeof(options));
 132         }
 133
 134         fprintf(stderr,
 135         "usage: ifconfig %sinterface address_family [address [dest_address]]\n"
 136         "                [parameters]\n"
 137         "       ifconfig interface create\n"
 138         "       ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n"
 139         "       ifconfig -l [-d] [-u] [address_family]\n"
 140         "       ifconfig %s[-d] [-m] [-u] [-v]\n",
 141                 options, options, options);
 142         exit(1);
 143 }
 144
 145 int
 146 main(int argc, char *argv[])
 147 {
 148         int c, namesonly, downonly, uponly;
 149         const struct afswtch *afp = NULL;
 150         int ifindex;
 151         struct ifaddrs *ifap, *ifa;
 152         struct ifreq paifr;
 153         const struct sockaddr_dl *sdl;
 154         char options[1024], *cp;
 155         const char *ifname;
 156         struct option *p;
 157         size_t iflen;
 158
 159         all = downonly = uponly = namesonly = noload = verbose = 0;
 160
 161         /* Parse leading line options */
 162 #ifndef __APPLE__
 163         strlcpy(options, "adklmnuv", sizeof(options));
 164 #else
 165         strlcpy(options, "adlmruv", sizeof(options));
 166 #endif
 167         for (p = opts; p != NULL; p = p->next)
 168                 strlcat(options, p->opt, sizeof(options));
 169         while ((c = getopt(argc, argv, options)) != -1) {
 170                 switch (c) {
 171                 case 'a':       /* scan all interfaces */
 172                         all++;
 173                         break;
 174                 case 'b':       /* bond detailed output */
 175                         bond_details++;
 176                         break;
 177                 case 'd':       /* restrict scan to "down" interfaces */
 178                         downonly++;
 179                         break;
 180 #ifndef __APPLE__
 181                 case 'k':
 182                         printkeys++;
 183                         break;
 184 #endif
 185                 case 'l':       /* scan interface names only */
 186                         namesonly++;
 187                         break;
 188                 case 'm':       /* show media choices in status */
 189                         supmedia = 1;
 190                         break;
 191 #ifndef __APPLE__
 192                 case 'n':       /* suppress module loading */
 193                         noload++;
 194                         break;
 195 #endif
 196                 case 'r':
 197                         showrtref++;
 198                         break;
 199                 case 'u':       /* restrict scan to "up" interfaces */
 200                         uponly++;
 201                         break;
 202                 case 'v':
 203                         verbose++;
 204                         break;
 205                 default:
 206                         for (p = opts; p != NULL; p = p->next)
 207                                 if (p->opt[0] == c) {
 208                                         p->cb(optarg);
 209                                         break;
 210                                 }
 211                         if (p == NULL)
 212                                 usage();
 213                         break;
 214                 }
 215         }
 216         argc -= optind;
 217         argv += optind;
 218
 219         /* -l cannot be used with -a or -r or -m or -b */
 220         if (namesonly && (all || supmedia || showrtref || bond_details))
 221                 usage();
 222
 223         /* nonsense.. */
 224         if (uponly && downonly)
 225                 usage();
 226
 227         /* no arguments is equivalent to '-a' */
 228         if (!namesonly && argc < 1)
 229                 all = 1;
 230
 231         /* -a and -l allow an address family arg to limit the output */
 232         if (all || namesonly) {
 233                 if (argc > 1)
 234                         usage();
 235
 236                 ifname = NULL;
 237                 ifindex = 0;
 238                 if (argc == 1) {
 239                         afp = af_getbyname(*argv);
 240                         if (afp == NULL)
 241                                 usage();
 242                         if (afp->af_name != NULL)
 243                                 argc--, argv++;
 244                         /* leave with afp non-zero */
 245                 }
 246         } else {
 247                 /* not listing, need an argument */
 248                 if (argc < 1)
 249                         usage();
 250
 251                 ifname = *argv;
 252                 argc--, argv++;
 253
 254 #ifdef notdef
 255                 /* check and maybe load support for this interface */
 256                 ifmaybeload(ifname);
 257 #endif
 258                 ifindex = if_nametoindex(ifname);
 259                 if (ifindex == 0) {
 260                         /*
 261                          * NOTE:  We must special-case the `create' command
 262                          * right here as we would otherwise fail when trying
 263                          * to find the interface.
 264                          */
 265                         if (argc > 0 && (strcmp(argv[0], "create") == 0 ||
 266                             strcmp(argv[0], "plumb") == 0)) {
 267                                 iflen = strlcpy(name, ifname, sizeof(name));
 268                                 if (iflen >= sizeof(name))
 269                                         errx(1, "%s: cloning name too long",
 270                                             ifname);
 271                                 ifconfig(argc, argv, 1, NULL);
 272                                 exit(0);
 273                         }
 274                         errx(1, "interface %s does not exist", ifname);
 275                 }
 276         }
 277
 278         /* Check for address family */
 279         if (argc > 0) {
 280                 afp = af_getbyname(*argv);
 281                 if (afp != NULL)
 282                         argc--, argv++;
 283         }
 284
 285         if (getifaddrs(&ifap) != 0)
 286                 err(EXIT_FAILURE, "getifaddrs");
 287         cp = NULL;
 288         ifindex = 0;
 289         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 290                 memset(&paifr, 0, sizeof(paifr));
 291                 strncpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name));
 292                 if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) {
 293                         memcpy(&paifr.ifr_addr, ifa->ifa_addr,
 294                             ifa->ifa_addr->sa_len);
 295                 }
 296
 297                 if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0)
 298                         continue;
 299                 if (ifa->ifa_addr->sa_family == AF_LINK)
 300                         sdl = (const struct sockaddr_dl *) ifa->ifa_addr;
 301                 else
 302                         sdl = NULL;
 303                 if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0)
 304                         continue;
 305                 iflen = strlcpy(name, ifa->ifa_name, sizeof(name));
 306                 if (iflen >= sizeof(name)) {
 307                         warnx("%s: interface name too long, skipping",
 308                             ifa->ifa_name);
 309                         continue;
 310                 }
 311                 cp = ifa->ifa_name;
 312
 313                 if (downonly && (ifa->ifa_flags & IFF_UP) != 0)
 314                         continue;
 315                 if (uponly && (ifa->ifa_flags & IFF_UP) == 0)
 316                         continue;
 317                 ifindex++;
 318                 /*
 319                  * Are we just listing the interfaces?
 320                  */
 321                 if (namesonly) {
 322                         if (ifindex > 1)
 323                                 printf(" ");
 324                         fputs(name, stdout);
 325                         continue;
 326                 }
 327
 328                 if (argc > 0)
 329                         ifconfig(argc, argv, 0, afp);
 330                 else
 331                         status(afp, sdl, ifa);
 332         }
 333         if (namesonly)
 334                 printf("\n");
 335         freeifaddrs(ifap);
 336
 337         exit(0);
 338 }
 339
 340 static struct afswtch *afs = NULL;
 341
 342 void
 343 af_register(struct afswtch *p)
 344 {
 345         p->af_next = afs;
 346         afs = p;
 347 }
 348
 349 static struct afswtch *
 350 af_getbyname(const char *name)
 351 {
 352         struct afswtch *afp;
 353
 354         for (afp = afs; afp !=  NULL; afp = afp->af_next)
 355                 if (strcmp(afp->af_name, name) == 0)
 356                         return afp;
 357         return NULL;
 358 }
 359
 360 static struct afswtch *
 361 af_getbyfamily(int af)
 362 {
 363         struct afswtch *afp;
 364
 365         for (afp = afs; afp != NULL; afp = afp->af_next)
 366                 if (afp->af_af == af)
 367                         return afp;
 368         return NULL;
 369 }
 370
 371 static void
 372 af_other_status(int s)
 373 {
 374         struct afswtch *afp;
 375         uint8_t afmask[howmany(AF_MAX, NBBY)];
 376
 377         memset(afmask, 0, sizeof(afmask));
 378         for (afp = afs; afp != NULL; afp = afp->af_next) {
 379                 if (afp->af_other_status == NULL)
 380                         continue;
 381                 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
 382                         continue;
 383                 afp->af_other_status(s);
 384                 setbit(afmask, afp->af_af);
 385         }
 386 }
 387
 388 static void
 389 af_all_tunnel_status(int s)
 390 {
 391         struct afswtch *afp;
 392         uint8_t afmask[howmany(AF_MAX, NBBY)];
 393
 394         memset(afmask, 0, sizeof(afmask));
 395         for (afp = afs; afp != NULL; afp = afp->af_next) {
 396                 if (afp->af_status_tunnel == NULL)
 397                         continue;
 398                 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
 399                         continue;
 400                 afp->af_status_tunnel(s);
 401                 setbit(afmask, afp->af_af);
 402         }
 403 }
 404
 405 static struct cmd *cmds = NULL;
 406
 407 void
 408 cmd_register(struct cmd *p)
 409 {
 410         p->c_next = cmds;
 411         cmds = p;
 412 }
 413
 414 static const struct cmd *
 415 cmd_lookup(const char *name)
 416 {
 417 #define N(a)    (sizeof(a)/sizeof(a[0]))
 418         const struct cmd *p;
 419
 420         for (p = cmds; p != NULL; p = p->c_next)
 421                 if (strcmp(name, p->c_name) == 0)
 422                         return p;
 423         return NULL;
 424 #undef N
 425 }
 426
 427 struct callback {
 428         callback_func *cb_func;
 429         void    *cb_arg;
 430         struct callback *cb_next;
 431 };
 432 static struct callback *callbacks = NULL;
 433
 434 void
 435 callback_register(callback_func *func, void *arg)
 436 {
 437         struct callback *cb;
 438
 439         cb = malloc(sizeof(struct callback));
 440         if (cb == NULL)
 441                 errx(1, "unable to allocate memory for callback");
 442         cb->cb_func = func;
 443         cb->cb_arg = arg;
 444         cb->cb_next = callbacks;
 445         callbacks = cb;
 446 }
 447
 448 /* specially-handled commands */
 449 static void setifaddr(const char *, int, int, const struct afswtch *);
 450 static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr);
 451
 452 static void setifdstaddr(const char *, int, int, const struct afswtch *);
 453 static const struct cmd setifdstaddr_cmd =
 454         DEF_CMD("ifdstaddr", 0, setifdstaddr);
 455
 456 static int
 457 ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *afp)
 458 {
 459         const struct afswtch *nafp;
 460         struct callback *cb;
 461         int s;
 462
 463         strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
 464 top:
 465         if (afp == NULL)
 466                 afp = af_getbyname("inet");
 467         ifr.ifr_addr.sa_family =
 468                 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ?
 469                 AF_INET : afp->af_af;
 470
 471         if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0)
 472                 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family);
 473
 474         while (argc > 0) {
 475                 const struct cmd *p;
 476
 477                 p = cmd_lookup(*argv);
 478                 if (p == NULL) {
 479                         /*
 480                          * Not a recognized command, choose between setting
 481                          * the interface address and the dst address.
 482                          */
 483                         p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd);
 484                 }
 485                 if (p->c_u.c_func || p->c_u.c_func2) {
 486                         if (iscreate && !p->c_iscloneop) {
 487                                 /*
 488                                  * Push the clone create callback so the new
 489                                  * device is created and can be used for any
 490                                  * remaining arguments.
 491                                  */
 492                                 cb = callbacks;
 493                                 if (cb == NULL)
 494                                         errx(1, "internal error, no callback");
 495                                 callbacks = cb->cb_next;
 496                                 cb->cb_func(s, cb->cb_arg);
 497                                 iscreate = 0;
 498                                 /*
 499                                  * Handle any address family spec that
 500                                  * immediately follows and potentially
 501                                  * recreate the socket.
 502                                  */
 503                                 nafp = af_getbyname(*argv);
 504                                 if (nafp != NULL) {
 505                                         argc--, argv++;
 506                                         if (nafp != afp) {
 507                                                 close(s);
 508                                                 afp = nafp;
 509                                                 goto top;
 510                                         }
 511                                 }
 512                         }
 513                         if (p->c_parameter == NEXTARG) {
 514                                 if (argv[1] == NULL)
 515                                         errx(1, "'%s' requires argument",
 516                                             p->c_name);
 517                                 p->c_u.c_func(argv[1], 0, s, afp);
 518                                 argc--, argv++;
 519                         } else if (p->c_parameter == OPTARG) {
 520                                 p->c_u.c_func(argv[1], 0, s, afp);
 521                                 if (argv[1] != NULL)
 522                                         argc--, argv++;
 523                         } else if (p->c_parameter == NEXTARG2) {
 524                                 if (argc < 3)
 525                                         errx(1, "'%s' requires 2 arguments",
 526                                             p->c_name);
 527                                 p->c_u.c_func2(argv[1], argv[2], s, afp);
 528                                 argc -= 2, argv += 2;
 529                         } else
 530                                 p->c_u.c_func(*argv, p->c_parameter, s, afp);
 531                 }
 532                 argc--, argv++;
 533         }
 534
 535         /*
 536          * Do any post argument processing required by the address family.
 537          */
 538         if (afp->af_postproc != NULL)
 539                 afp->af_postproc(s, afp);
 540         /*
 541          * Do deferred callbacks registered while processing
 542          * command-line arguments.
 543          */
 544         for (cb = callbacks; cb != NULL; cb = cb->cb_next)
 545                 cb->cb_func(s, cb->cb_arg);
 546         /*
 547          * Do deferred operations.
 548          */
 549         if (clearaddr) {
 550                 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) {
 551                         warnx("interface %s cannot change %s addresses!",
 552                               name, afp->af_name);
 553                         clearaddr = 0;
 554                 }
 555         }
 556         if (clearaddr) {
 557                 int ret;
 558                 strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name);
 559                 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq);
 560                 if (ret < 0) {
 561                         if (errno == EADDRNOTAVAIL && (doalias >= 0)) {
 562                                 /* means no previous address for interface */
 563                         } else
 564                                 Perror("ioctl (SIOCDIFADDR)");
 565                 }
 566         }
 567         if (newaddr) {
 568                 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) {
 569                         warnx("interface %s cannot change %s addresses!",
 570                               name, afp->af_name);
 571                         newaddr = 0;
 572                 }
 573         }
 574         if (newaddr && (setaddr || setmask)) {
 575                 strncpy(afp->af_addreq, name, sizeof ifr.ifr_name);
 576                 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0)
 577                         Perror("ioctl (SIOCAIFADDR)");
 578         }
 579
 580         close(s);
 581         return(0);
 582 }
 583
 584 /*ARGSUSED*/
 585 static void
 586 setifaddr(const char *addr, int param, int s, const struct afswtch *afp)
 587 {
 588         if (afp->af_getaddr == NULL)
 589                 return;
 590         /*
 591          * Delay the ioctl to set the interface addr until flags are all set.
 592          * The address interpretation may depend on the flags,
 593          * and the flags may change when the address is set.
 594          */
 595         setaddr++;
 596         if (doalias == 0 && afp->af_af != AF_LINK)
 597                 clearaddr = 1;
 598         afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR));
 599 }
 600
 601 static void
 602 settunnel(const char *src, const char *dst, int s, const struct afswtch *afp)
 603 {
 604         struct addrinfo *srcres, *dstres;
 605         int ecode;
 606
 607         if (afp->af_settunnel == NULL) {
 608                 warn("address family %s does not support tunnel setup",
 609                         afp->af_name);
 610                 return;
 611         }
 612
 613         if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0)
 614                 errx(1, "error in parsing address string: %s",
 615                     gai_strerror(ecode));
 616
 617         if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0)
 618                 errx(1, "error in parsing address string: %s",
 619                     gai_strerror(ecode));
 620
 621         if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family)
 622                 errx(1,
 623                     "source and destination address families do not match");
 624
 625         afp->af_settunnel(s, srcres, dstres);
 626
 627         freeaddrinfo(srcres);
 628         freeaddrinfo(dstres);
 629 }
 630
 631 /* ARGSUSED */
 632 static void
 633 deletetunnel(const char *vname, int param, int s, const struct afswtch *afp)
 634 {
 635
 636         if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0)
 637                 err(1, "SIOCDIFPHYADDR");
 638 }
 639
 640 static void
 641 setifnetmask(const char *addr, int dummy __unused, int s,
 642     const struct afswtch *afp)
 643 {
 644         if (afp->af_getaddr != NULL) {
 645                 setmask++;
 646                 afp->af_getaddr(addr, MASK);
 647         }
 648 }
 649
 650 static void
 651 setifbroadaddr(const char *addr, int dummy __unused, int s,
 652     const struct afswtch *afp)
 653 {
 654         if (afp->af_getaddr != NULL)
 655                 afp->af_getaddr(addr, DSTADDR);
 656 }
 657
 658 static void
 659 setifipdst(const char *addr, int dummy __unused, int s,
 660     const struct afswtch *afp)
 661 {
 662         const struct afswtch *inet;
 663
 664         inet = af_getbyname("inet");
 665         if (inet == NULL)
 666                 return;
 667         inet->af_getaddr(addr, DSTADDR);
 668         clearaddr = 0;
 669         newaddr = 0;
 670 }
 671
 672 static void
 673 notealias(const char *addr, int param, int s, const struct afswtch *afp)
 674 {
 675 #define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr))
 676         if (setaddr && doalias == 0 && param < 0)
 677                 if (afp->af_addreq != NULL && afp->af_ridreq != NULL)
 678                         bcopy((caddr_t)rqtosa(af_addreq),
 679                               (caddr_t)rqtosa(af_ridreq),
 680                               rqtosa(af_addreq)->sa_len);
 681         doalias = param;
 682         if (param < 0) {
 683                 clearaddr = 1;
 684                 newaddr = 0;
 685         } else
 686                 clearaddr = 0;
 687 #undef rqtosa
 688 }
 689
 690 /*ARGSUSED*/
 691 static void
 692 setifdstaddr(const char *addr, int param __unused, int s,
 693     const struct afswtch *afp)
 694 {
 695         if (afp->af_getaddr != NULL)
 696                 afp->af_getaddr(addr, DSTADDR);
 697 }
 698
 699 /*
 700  * Note: doing an SIOCIGIFFLAGS scribbles on the union portion
 701  * of the ifreq structure, which may confuse other parts of ifconfig.
 702  * Make a private copy so we can avoid that.
 703  */
 704 static void
 705 setifflags(const char *vname, int value, int s, const struct afswtch *afp)
 706 {
 707         struct ifreq            my_ifr;
 708         int flags;
 709
 710         bcopy((char *)&ifr, (char *)&my_ifr, sizeof(struct ifreq));
 711
 712         if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) {
 713                 Perror("ioctl (SIOCGIFFLAGS)");
 714                 exit(1);
 715         }
 716         strncpy(my_ifr.ifr_name, name, sizeof (my_ifr.ifr_name));
 717         flags = my_ifr.ifr_flags;
 718
 719         if (value < 0) {
 720                 value = -value;
 721                 flags &= ~value;
 722         } else
 723                 flags |= value;
 724         my_ifr.ifr_flags = flags & 0xffff;
 725         if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
 726                 Perror(vname);
 727 }
 728
 729 #ifndef __APPLE__
 730 void
 731 setifcap(const char *vname, int value, int s, const struct afswtch *afp)
 732 {
 733         int flags;
 734
 735         if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) {
 736                 Perror("ioctl (SIOCGIFCAP)");
 737                 exit(1);
 738         }
 739         flags = ifr.ifr_curcap;
 740         if (value < 0) {
 741                 value = -value;
 742                 flags &= ~value;
 743         } else
 744                 flags |= value;
 745         flags &= ifr.ifr_reqcap;
 746         ifr.ifr_reqcap = flags;
 747         if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0)
 748                 Perror(vname);
 749 }
 750 #endif
 751
 752 static void
 753 setifmetric(const char *val, int dummy __unused, int s,
 754     const struct afswtch *afp)
 755 {
 756         strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
 757         ifr.ifr_metric = atoi(val);
 758         if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0)
 759                 warn("ioctl (set metric)");
 760 }
 761
 762 static void
 763 setifmtu(const char *val, int dummy __unused, int s,
 764     const struct afswtch *afp)
 765 {
 766         strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
 767         ifr.ifr_mtu = atoi(val);
 768         if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0)
 769                 warn("ioctl (set mtu)");
 770 }
 771
 772 #ifndef __APPLE__
 773 static void
 774 setifname(const char *val, int dummy __unused, int s,
 775     const struct afswtch *afp)
 776 {
 777         char *newname;
 778
 779         newname = strdup(val);
 780         if (newname == NULL) {
 781                 warn("no memory to set ifname");
 782                 return;
 783         }
 784         ifr.ifr_data = newname;
 785         if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
 786                 warn("ioctl (set name)");
 787                 free(newname);
 788                 return;
 789         }
 790         strlcpy(name, newname, sizeof(name));
 791         free(newname);
 792 }
 793 #endif
 794
 795 #define IFFBITS \
 796 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \
 797 "\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \
 798 "\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP\25NEEDSGIANT"
 799
 800 #define IFCAPBITS \
 801 "\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \
 802 "\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC"
 803
 804 /*
 805  * Print the status of the interface.  If an address family was
 806  * specified, show only it; otherwise, show them all.
 807  */
 808 static void
 809 status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
 810         struct ifaddrs *ifa)
 811 {
 812         struct ifaddrs *ift;
 813         int allfamilies, s;
 814         struct ifstat ifs;
 815
 816         if (afp == NULL) {
 817                 allfamilies = 1;
 818                 afp = af_getbyname("inet");
 819         } else
 820                 allfamilies = 0;
 821
 822         ifr.ifr_addr.sa_family = afp->af_af == AF_LINK ? AF_INET : afp->af_af;
 823         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 824
 825         s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0);
 826         if (s < 0)
 827                 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family);
 828
 829         printf("%s: ", name);
 830         printb("flags", ifa->ifa_flags, IFFBITS);
 831         if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1)
 832                 if (ifr.ifr_metric)
 833                         printf(" metric %d", ifr.ifr_metric);
 834         if (ioctl(s, SIOCGIFMTU, &ifr) != -1)
 835                 printf(" mtu %d", ifr.ifr_mtu);
 836 #ifdef SIOCGIFGETRTREFCNT
 837         if (showrtref && ioctl(s, SIOCGIFGETRTREFCNT, &ifr) != -1)
 838                 printf(" rtref %d", ifr.ifr_route_refcnt);
 839 #endif
 840         putchar('\n');
 841
 842 #ifndef __APPLE__
 843         if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) {
 844                 if (ifr.ifr_curcap != 0) {
 845                         printb("\toptions", ifr.ifr_curcap, IFCAPBITS);
 846                         putchar('\n');
 847                 }
 848                 if (supmedia && ifr.ifr_reqcap != 0) {
 849                         printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS);
 850                         putchar('\n');
 851                 }
 852         }
 853 #endif
 854
 855         tunnel_status(s);
 856
 857         for (ift = ifa; ift != NULL; ift = ift->ifa_next) {
 858                 if (ift->ifa_addr == NULL)
 859                         continue;
 860                 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0)
 861                         continue;
 862                 if (allfamilies) {
 863                         const struct afswtch *p;
 864                         p = af_getbyfamily(ift->ifa_addr->sa_family);
 865                         if (p != NULL && p->af_status != NULL)
 866                                 p->af_status(s, ift);
 867                 } else if (afp->af_af == ift->ifa_addr->sa_family)
 868                         afp->af_status(s, ift);
 869         }
 870 #if 0
 871         if (allfamilies || afp->af_af == AF_LINK) {
 872                 const struct afswtch *lafp;
 873
 874                 /*
 875                  * Hack; the link level address is received separately
 876                  * from the routing information so any address is not
 877                  * handled above.  Cobble together an entry and invoke
 878                  * the status method specially.
 879                  */
 880                 lafp = af_getbyname("lladdr");
 881                 if (lafp != NULL) {
 882                         info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl;
 883                         lafp->af_status(s, &info);
 884                 }
 885         }
 886 #endif
 887         if (allfamilies)
 888                 af_other_status(s);
 889         else if (afp->af_other_status != NULL)
 890                 afp->af_other_status(s);
 891
 892         strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name);
 893         if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0)
 894                 printf("%s", ifs.ascii);
 895
 896         close(s);
 897         return;
 898 }
 899
 900 static void
 901 tunnel_status(int s)
 902 {
 903         af_all_tunnel_status(s);
 904 }
 905
 906 void
 907 Perror(const char *cmd)
 908 {
 909         switch (errno) {
 910
 911         case ENXIO:
 912                 errx(1, "%s: no such interface", cmd);
 913                 break;
 914
 915         case EPERM:
 916                 errx(1, "%s: permission denied", cmd);
 917                 break;
 918
 919         default:
 920                 err(1, "%s", cmd);
 921         }
 922 }
 923
 924 /*
 925  * Print a value a la the %b format of the kernel's printf
 926  */
 927 void
 928 printb(const char *s, unsigned v, const char *bits)
 929 {
 930         int i, any = 0;
 931         char c;
 932
 933         if (bits && *bits == 8)
 934                 printf("%s=%o", s, v);
 935         else
 936                 printf("%s=%x", s, v);
 937         bits++;
 938         if (bits) {
 939                 putchar('<');
 940                 while ((i = *bits++) != '\0') {
 941                         if (v & (1 << (i-1))) {
 942                                 if (any)
 943                                         putchar(',');
 944                                 any = 1;
 945                                 for (; (c = *bits) > 32; bits++)
 946                                         putchar(c);
 947                         } else
 948                                 for (; *bits > 32; bits++)
 949                                         ;
 950                 }
 951                 putchar('>');
 952         }
 953 }
 954
 955 #ifndef __APPLE__
 956 void
 957 ifmaybeload(const char *name)
 958 {
 959 #define MOD_PREFIX_LEN          3       /* "if_" */
 960         struct module_stat mstat;
 961         int fileid, modid;
 962         char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp;
 963         const char *cp;
 964
 965         /* loading suppressed by the user */
 966         if (noload)
 967                 return;
 968
 969         /* trim the interface number off the end */
 970         strlcpy(ifname, name, sizeof(ifname));
 971         for (dp = ifname; *dp != 0; dp++)
 972                 if (isdigit(*dp)) {
 973                         *dp = 0;
 974                         break;
 975                 }
 976
 977         /* turn interface and unit into module name */
 978         strcpy(ifkind, "if_");
 979         strlcpy(ifkind + MOD_PREFIX_LEN, ifname,
 980             sizeof(ifkind) - MOD_PREFIX_LEN);
 981
 982         /* scan files in kernel */
 983         mstat.version = sizeof(struct module_stat);
 984         for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) {
 985                 /* scan modules in file */
 986                 for (modid = kldfirstmod(fileid); modid > 0;
 987                      modid = modfnext(modid)) {
 988                         if (modstat(modid, &mstat) < 0)
 989                                 continue;
 990                         /* strip bus name if present */
 991                         if ((cp = strchr(mstat.name, '/')) != NULL) {
 992                                 cp++;
 993                         } else {
 994                                 cp = mstat.name;
 995                         }
 996                         /* already loaded? */
 997                         if (strncmp(ifname, cp, strlen(ifname) + 1) == 0 ||
 998                             strncmp(ifkind, cp, strlen(ifkind) + 1) == 0)
 999                                 return;
1000                 }
1001         }
1002
1003         /* not present, we should try to load it */
1004         kldload(ifkind);
1005 }
1006 #endif
1007
1008 static struct cmd basic_cmds[] = {
1009         DEF_CMD("up",           IFF_UP,         setifflags),
1010         DEF_CMD("down",         -IFF_UP,        setifflags),
1011         DEF_CMD("arp",          -IFF_NOARP,     setifflags),
1012         DEF_CMD("-arp",         IFF_NOARP,      setifflags),
1013         DEF_CMD("debug",        IFF_DEBUG,      setifflags),
1014         DEF_CMD("-debug",       -IFF_DEBUG,     setifflags),
1015 #ifdef notdef
1016         DEF_CMD("promisc",      IFF_PPROMISC,   setifflags),
1017         DEF_CMD("-promisc",     -IFF_PPROMISC,  setifflags),
1018 #endif
1019         DEF_CMD("add",          IFF_UP,         notealias),
1020         DEF_CMD("alias",        IFF_UP,         notealias),
1021         DEF_CMD("-alias",       -IFF_UP,        notealias),
1022         DEF_CMD("delete",       -IFF_UP,        notealias),
1023         DEF_CMD("remove",       -IFF_UP,        notealias),
1024 #ifdef notdef
1025 #define EN_SWABIPS      0x1000
1026         DEF_CMD("swabips",      EN_SWABIPS,     setifflags),
1027         DEF_CMD("-swabips",     -EN_SWABIPS,    setifflags),
1028 #endif
1029         DEF_CMD_ARG("netmask",                  setifnetmask),
1030         DEF_CMD_ARG("metric",                   setifmetric),
1031         DEF_CMD_ARG("broadcast",                setifbroadaddr),
1032         DEF_CMD_ARG("ipdst",                    setifipdst),
1033         DEF_CMD_ARG2("tunnel",                  settunnel),
1034         DEF_CMD("-tunnel", 0,                   deletetunnel),
1035         DEF_CMD("deletetunnel", 0,              deletetunnel),
1036         DEF_CMD("link0",        IFF_LINK0,      setifflags),
1037         DEF_CMD("-link0",       -IFF_LINK0,     setifflags),
1038         DEF_CMD("link1",        IFF_LINK1,      setifflags),
1039         DEF_CMD("-link1",       -IFF_LINK1,     setifflags),
1040         DEF_CMD("link2",        IFF_LINK2,      setifflags),
1041         DEF_CMD("-link2",       -IFF_LINK2,     setifflags),
1042 #ifdef notdef
1043         DEF_CMD("monitor",      IFF_MONITOR:,   setifflags),
1044         DEF_CMD("-monitor",     -IFF_MONITOR,   setifflags),
1045         DEF_CMD("staticarp",    IFF_STATICARP,  setifflags),
1046         DEF_CMD("-staticarp",   -IFF_STATICARP, setifflags),
1047         DEF_CMD("rxcsum",       IFCAP_RXCSUM,   setifcap),
1048         DEF_CMD("-rxcsum",      -IFCAP_RXCSUM,  setifcap),
1049         DEF_CMD("txcsum",       IFCAP_TXCSUM,   setifcap),
1050         DEF_CMD("-txcsum",      -IFCAP_TXCSUM,  setifcap),
1051         DEF_CMD("netcons",      IFCAP_NETCONS,  setifcap),
1052         DEF_CMD("-netcons",     -IFCAP_NETCONS, setifcap),
1053         DEF_CMD("polling",      IFCAP_POLLING,  setifcap),
1054         DEF_CMD("-polling",     -IFCAP_POLLING, setifcap),
1055         DEF_CMD("tso",          IFCAP_TSO,      setifcap),
1056         DEF_CMD("-tso",         -IFCAP_TSO,     setifcap),
1057         DEF_CMD("lro",          IFCAP_LRO,      setifcap),
1058         DEF_CMD("-lro",         -IFCAP_LRO,     setifcap),
1059         DEF_CMD("wol",          IFCAP_WOL,      setifcap),
1060         DEF_CMD("-wol",         -IFCAP_WOL,     setifcap),
1061         DEF_CMD("wol_ucast",    IFCAP_WOL_UCAST,        setifcap),
1062         DEF_CMD("-wol_ucast",   -IFCAP_WOL_UCAST,       setifcap),
1063         DEF_CMD("wol_mcast",    IFCAP_WOL_MCAST,        setifcap),
1064         DEF_CMD("-wol_mcast",   -IFCAP_WOL_MCAST,       setifcap),
1065         DEF_CMD("wol_magic",    IFCAP_WOL_MAGIC,        setifcap),
1066         DEF_CMD("-wol_magic",   -IFCAP_WOL_MAGIC,       setifcap),
1067 #endif
1068         DEF_CMD("normal",       -IFF_LINK0,     setifflags),
1069         DEF_CMD("compress",     IFF_LINK0,      setifflags),
1070         DEF_CMD("noicmp",       IFF_LINK1,      setifflags),
1071         DEF_CMD_ARG("mtu",                      setifmtu),
1072 #ifdef notdef
1073         DEF_CMD_ARG("name",                     setifname),
1074 #endif
1075 };
1076
1077 static __constructor void
1078 ifconfig_ctor(void)
1079 {
1080 #define N(a)    (sizeof(a) / sizeof(a[0]))
1081         int i;
1082
1083         for (i = 0; i < N(basic_cmds);  i++)
1084                 cmd_register(&basic_cmds[i]);
1085 #undef N
1086 }