ifconfig.tproj/ifconfig.c

   1 /*
   2  * Copyright (c) 2009 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 /*
  30  * Copyright (c) 1983, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 #ifndef lint
  59 static const char copyright[] =
  60 "@(#) Copyright (c) 1983, 1993\n\
  61         The Regents of the University of California.  All rights reserved.\n";
  62 #endif /* not lint */
  63
  64 #ifndef lint
  65 #if 0
  66 static char sccsid[] = "@(#)ifconfig.c  8.2 (Berkeley) 2/16/94";
  67 #endif
  68 static const char rcsid[] =
  69   "$FreeBSD: src/sbin/ifconfig/ifconfig.c,v 1.134.2.2.2.1 2008/11/25 02:59:29 kensmith Exp $";
  70 #endif /* not lint */
  71
  72 #include <sys/param.h>
  73 #include <sys/ioctl.h>
  74 #include <sys/socket.h>
  75 #include <sys/sysctl.h>
  76 #include <sys/time.h>
  77 #ifndef __APPLE__
  78 #include <sys/module.h>
  79 #include <sys/linker.h>
  80 #endif
  81
  82 #include <net/ethernet.h>
  83 #include <net/if.h>
  84 #include <net/if_var.h>
  85 #include <net/if_dl.h>
  86 #include <net/if_types.h>
  87 #include <net/route.h>
  88
  89 /* IP */
  90 #include <netinet/in.h>
  91 #include <netinet/in_var.h>
  92 #include <arpa/inet.h>
  93 #include <netdb.h>
  94
  95 #include <ifaddrs.h>
  96 #include <ctype.h>
  97 #include <err.h>
  98 #include <errno.h>
  99 #include <fcntl.h>
 100 #include <stdio.h>
 101 #include <stdlib.h>
 102 #include <string.h>
 103 #include <unistd.h>
 104
 105 #include "ifconfig.h"
 106
 107 /*
 108  * Since "struct ifreq" is composed of various union members, callers
 109  * should pay special attention to interprete the value.
 110  * (.e.g. little/big endian difference in the structure.)
 111  */
 112 struct  ifreq ifr;
 113
 114 char    name[IFNAMSIZ];
 115 int     setaddr;
 116 int     setmask;
 117 int     doalias;
 118 int     clearaddr;
 119 int     newaddr = 1;
 120 int     verbose;
 121 int     noload;
 122 int all;
 123
 124 int bond_details = 0;
 125 int     supmedia = 0;
 126 int     showrtref = 0;
 127 int     printkeys = 0;          /* Print keying material for interfaces. */
 128
 129 static  int ifconfig(int argc, char *const *argv, int iscreate,
 130                 const struct afswtch *afp);
 131 static  void status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
 132                 struct ifaddrs *ifa);
 133 static  void tunnel_status(int s);
 134 static  void usage(void);
 135
 136 static struct afswtch *af_getbyname(const char *name);
 137 static struct afswtch *af_getbyfamily(int af);
 138 static void af_other_status(int);
 139
 140 static struct option *opts = NULL;
 141
 142 void
 143 opt_register(struct option *p)
 144 {
 145         p->next = opts;
 146         opts = p;
 147 }
 148
 149 static void
 150 usage(void)
 151 {
 152         char options[1024];
 153         struct option *p;
 154
 155         /* XXX not right but close enough for now */
 156         options[0] = '\0';
 157         for (p = opts; p != NULL; p = p->next) {
 158                 strlcat(options, p->opt_usage, sizeof(options));
 159                 strlcat(options, " ", sizeof(options));
 160         }
 161
 162         fprintf(stderr,
 163         "usage: ifconfig %sinterface address_family [address [dest_address]]\n"
 164         "                [parameters]\n"
 165         "       ifconfig interface create\n"
 166         "       ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n"
 167         "       ifconfig -l [-d] [-u] [address_family]\n"
 168         "       ifconfig %s[-d] [-m] [-u] [-v]\n",
 169                 options, options, options);
 170         exit(1);
 171 }
 172
 173 int
 174 main(int argc, char *argv[])
 175 {
 176         int c, namesonly, downonly, uponly;
 177         const struct afswtch *afp = NULL;
 178         int ifindex;
 179         struct ifaddrs *ifap, *ifa;
 180         struct ifreq paifr;
 181         const struct sockaddr_dl *sdl;
 182         char options[1024], *cp;
 183         const char *ifname;
 184         struct option *p;
 185         size_t iflen;
 186
 187         all = downonly = uponly = namesonly = noload = verbose = 0;
 188
 189         /* Parse leading line options */
 190 #ifndef __APPLE__
 191         strlcpy(options, "adklmnuv", sizeof(options));
 192 #else
 193         strlcpy(options, "abdlmruv", sizeof(options));
 194 #endif
 195         for (p = opts; p != NULL; p = p->next)
 196                 strlcat(options, p->opt, sizeof(options));
 197         while ((c = getopt(argc, argv, options)) != -1) {
 198                 switch (c) {
 199                 case 'a':       /* scan all interfaces */
 200                         all++;
 201                         break;
 202                 case 'b':       /* bond detailed output */
 203                         bond_details++;
 204                         break;
 205                 case 'd':       /* restrict scan to "down" interfaces */
 206                         downonly++;
 207                         break;
 208 #ifndef __APPLE__
 209                 case 'k':
 210                         printkeys++;
 211                         break;
 212 #endif
 213                 case 'l':       /* scan interface names only */
 214                         namesonly++;
 215                         break;
 216                 case 'm':       /* show media choices in status */
 217                         supmedia = 1;
 218                         break;
 219 #ifndef __APPLE__
 220                 case 'n':       /* suppress module loading */
 221                         noload++;
 222                         break;
 223 #endif
 224                 case 'r':
 225                         showrtref++;
 226                         break;
 227                 case 'u':       /* restrict scan to "up" interfaces */
 228                         uponly++;
 229                         break;
 230                 case 'v':
 231                         verbose++;
 232                         break;
 233                 default:
 234                         for (p = opts; p != NULL; p = p->next)
 235                                 if (p->opt[0] == c) {
 236                                         p->cb(optarg);
 237                                         break;
 238                                 }
 239                         if (p == NULL)
 240                                 usage();
 241                         break;
 242                 }
 243         }
 244         argc -= optind;
 245         argv += optind;
 246
 247         /* -l cannot be used with -a or -r or -m or -b */
 248         if (namesonly && (all || supmedia || showrtref || bond_details))
 249                 usage();
 250
 251         /* nonsense.. */
 252         if (uponly && downonly)
 253                 usage();
 254
 255         /* no arguments is equivalent to '-a' */
 256         if (!namesonly && argc < 1)
 257                 all = 1;
 258
 259         /* -a and -l allow an address family arg to limit the output */
 260         if (all || namesonly) {
 261                 if (argc > 1)
 262                         usage();
 263
 264                 ifname = NULL;
 265                 ifindex = 0;
 266                 if (argc == 1) {
 267                         afp = af_getbyname(*argv);
 268                         if (afp == NULL)
 269                                 usage();
 270                         if (afp->af_name != NULL)
 271                                 argc--, argv++;
 272                         /* leave with afp non-zero */
 273                 }
 274         } else {
 275                 /* not listing, need an argument */
 276                 if (argc < 1)
 277                         usage();
 278
 279                 ifname = *argv;
 280                 argc--, argv++;
 281
 282 #ifdef notdef
 283                 /* check and maybe load support for this interface */
 284                 ifmaybeload(ifname);
 285 #endif
 286                 ifindex = if_nametoindex(ifname);
 287                 if (ifindex == 0) {
 288                         /*
 289                          * NOTE:  We must special-case the `create' command
 290                          * right here as we would otherwise fail when trying
 291                          * to find the interface.
 292                          */
 293                         if (argc > 0 && (strcmp(argv[0], "create") == 0 ||
 294                             strcmp(argv[0], "plumb") == 0)) {
 295                                 iflen = strlcpy(name, ifname, sizeof(name));
 296                                 if (iflen >= sizeof(name))
 297                                         errx(1, "%s: cloning name too long",
 298                                             ifname);
 299                                 ifconfig(argc, argv, 1, NULL);
 300                                 exit(0);
 301                         }
 302                         errx(1, "interface %s does not exist", ifname);
 303                 }
 304         }
 305
 306         /* Check for address family */
 307         if (argc > 0) {
 308                 afp = af_getbyname(*argv);
 309                 if (afp != NULL)
 310                         argc--, argv++;
 311         }
 312
 313         if (getifaddrs(&ifap) != 0)
 314                 err(EXIT_FAILURE, "getifaddrs");
 315         cp = NULL;
 316         ifindex = 0;
 317         for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
 318                 memset(&paifr, 0, sizeof(paifr));
 319                 strncpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name));
 320                 if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) {
 321                         memcpy(&paifr.ifr_addr, ifa->ifa_addr,
 322                             ifa->ifa_addr->sa_len);
 323                 }
 324
 325                 if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0)
 326                         continue;
 327                 if (ifa->ifa_addr->sa_family == AF_LINK)
 328                         sdl = (const struct sockaddr_dl *) ifa->ifa_addr;
 329                 else
 330                         sdl = NULL;
 331                 if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0)
 332                         continue;
 333                 iflen = strlcpy(name, ifa->ifa_name, sizeof(name));
 334                 if (iflen >= sizeof(name)) {
 335                         warnx("%s: interface name too long, skipping",
 336                             ifa->ifa_name);
 337                         continue;
 338                 }
 339                 cp = ifa->ifa_name;
 340
 341                 if (downonly && (ifa->ifa_flags & IFF_UP) != 0)
 342                         continue;
 343                 if (uponly && (ifa->ifa_flags & IFF_UP) == 0)
 344                         continue;
 345                 ifindex++;
 346                 /*
 347                  * Are we just listing the interfaces?
 348                  */
 349                 if (namesonly) {
 350                         if (ifindex > 1)
 351                                 printf(" ");
 352                         fputs(name, stdout);
 353                         continue;
 354                 }
 355
 356                 if (argc > 0)
 357                         ifconfig(argc, argv, 0, afp);
 358                 else
 359                         status(afp, sdl, ifa);
 360         }
 361         if (namesonly)
 362                 printf("\n");
 363         freeifaddrs(ifap);
 364
 365         exit(0);
 366 }
 367
 368 static struct afswtch *afs = NULL;
 369
 370 void
 371 af_register(struct afswtch *p)
 372 {
 373         p->af_next = afs;
 374         afs = p;
 375 }
 376
 377 static struct afswtch *
 378 af_getbyname(const char *name)
 379 {
 380         struct afswtch *afp;
 381
 382         for (afp = afs; afp !=  NULL; afp = afp->af_next)
 383                 if (strcmp(afp->af_name, name) == 0)
 384                         return afp;
 385         return NULL;
 386 }
 387
 388 static struct afswtch *
 389 af_getbyfamily(int af)
 390 {
 391         struct afswtch *afp;
 392
 393         for (afp = afs; afp != NULL; afp = afp->af_next)
 394                 if (afp->af_af == af)
 395                         return afp;
 396         return NULL;
 397 }
 398
 399 static void
 400 af_other_status(int s)
 401 {
 402         struct afswtch *afp;
 403         uint8_t afmask[howmany(AF_MAX, NBBY)];
 404
 405         memset(afmask, 0, sizeof(afmask));
 406         for (afp = afs; afp != NULL; afp = afp->af_next) {
 407                 if (afp->af_other_status == NULL)
 408                         continue;
 409                 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
 410                         continue;
 411                 afp->af_other_status(s);
 412                 setbit(afmask, afp->af_af);
 413         }
 414 }
 415
 416 static void
 417 af_all_tunnel_status(int s)
 418 {
 419         struct afswtch *afp;
 420         uint8_t afmask[howmany(AF_MAX, NBBY)];
 421
 422         memset(afmask, 0, sizeof(afmask));
 423         for (afp = afs; afp != NULL; afp = afp->af_next) {
 424                 if (afp->af_status_tunnel == NULL)
 425                         continue;
 426                 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
 427                         continue;
 428                 afp->af_status_tunnel(s);
 429                 setbit(afmask, afp->af_af);
 430         }
 431 }
 432
 433 static struct cmd *cmds = NULL;
 434
 435 void
 436 cmd_register(struct cmd *p)
 437 {
 438         p->c_next = cmds;
 439         cmds = p;
 440 }
 441
 442 static const struct cmd *
 443 cmd_lookup(const char *name)
 444 {
 445 #define N(a)    (sizeof(a)/sizeof(a[0]))
 446         const struct cmd *p;
 447
 448         for (p = cmds; p != NULL; p = p->c_next)
 449                 if (strcmp(name, p->c_name) == 0)
 450                         return p;
 451         return NULL;
 452 #undef N
 453 }
 454
 455 struct callback {
 456         callback_func *cb_func;
 457         void    *cb_arg;
 458         struct callback *cb_next;
 459 };
 460 static struct callback *callbacks = NULL;
 461
 462 void
 463 callback_register(callback_func *func, void *arg)
 464 {
 465         struct callback *cb;
 466
 467         cb = malloc(sizeof(struct callback));
 468         if (cb == NULL)
 469                 errx(1, "unable to allocate memory for callback");
 470         cb->cb_func = func;
 471         cb->cb_arg = arg;
 472         cb->cb_next = callbacks;
 473         callbacks = cb;
 474 }
 475
 476 /* specially-handled commands */
 477 static void setifaddr(const char *, int, int, const struct afswtch *);
 478 static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr);
 479
 480 static void setifdstaddr(const char *, int, int, const struct afswtch *);
 481 static const struct cmd setifdstaddr_cmd =
 482         DEF_CMD("ifdstaddr", 0, setifdstaddr);
 483
 484 static int
 485 ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *afp)
 486 {
 487         const struct afswtch *nafp;
 488         struct callback *cb;
 489         int s;
 490
 491         strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
 492 top:
 493         if (afp == NULL)
 494                 afp = af_getbyname("inet");
 495         ifr.ifr_addr.sa_family =
 496                 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ?
 497                 AF_INET : afp->af_af;
 498
 499         if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0)
 500                 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family);
 501
 502         while (argc > 0) {
 503                 const struct cmd *p;
 504
 505                 p = cmd_lookup(*argv);
 506                 if (p == NULL) {
 507                         /*
 508                          * Not a recognized command, choose between setting
 509                          * the interface address and the dst address.
 510                          */
 511                         p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd);
 512                 }
 513                 if (p->c_u.c_func || p->c_u.c_func2) {
 514                         if (iscreate && !p->c_iscloneop) {
 515                                 /*
 516                                  * Push the clone create callback so the new
 517                                  * device is created and can be used for any
 518                                  * remaining arguments.
 519                                  */
 520                                 cb = callbacks;
 521                                 if (cb == NULL)
 522                                         errx(1, "internal error, no callback");
 523                                 callbacks = cb->cb_next;
 524                                 cb->cb_func(s, cb->cb_arg);
 525                                 iscreate = 0;
 526                                 /*
 527                                  * Handle any address family spec that
 528                                  * immediately follows and potentially
 529                                  * recreate the socket.
 530                                  */
 531                                 nafp = af_getbyname(*argv);
 532                                 if (nafp != NULL) {
 533                                         argc--, argv++;
 534                                         if (nafp != afp) {
 535                                                 close(s);
 536                                                 afp = nafp;
 537                                                 goto top;
 538                                         }
 539                                 }
 540                         }
 541                         if (p->c_parameter == NEXTARG) {
 542                                 if (argv[1] == NULL)
 543                                         errx(1, "'%s' requires argument",
 544                                             p->c_name);
 545                                 p->c_u.c_func(argv[1], 0, s, afp);
 546                                 argc--, argv++;
 547                         } else if (p->c_parameter == OPTARG) {
 548                                 p->c_u.c_func(argv[1], 0, s, afp);
 549                                 if (argv[1] != NULL)
 550                                         argc--, argv++;
 551                         } else if (p->c_parameter == NEXTARG2) {
 552                                 if (argc < 3)
 553                                         errx(1, "'%s' requires 2 arguments",
 554                                             p->c_name);
 555                                 p->c_u.c_func2(argv[1], argv[2], s, afp);
 556                                 argc -= 2, argv += 2;
 557                         } else
 558                                 p->c_u.c_func(*argv, p->c_parameter, s, afp);
 559                 }
 560                 argc--, argv++;
 561         }
 562
 563         /*
 564          * Do any post argument processing required by the address family.
 565          */
 566         if (afp->af_postproc != NULL)
 567                 afp->af_postproc(s, afp);
 568         /*
 569          * Do deferred callbacks registered while processing
 570          * command-line arguments.
 571          */
 572         for (cb = callbacks; cb != NULL; cb = cb->cb_next)
 573                 cb->cb_func(s, cb->cb_arg);
 574         /*
 575          * Do deferred operations.
 576          */
 577         if (clearaddr) {
 578                 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) {
 579                         warnx("interface %s cannot change %s addresses!",
 580                               name, afp->af_name);
 581                         clearaddr = 0;
 582                 }
 583         }
 584         if (clearaddr) {
 585                 int ret;
 586                 strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name);
 587                 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq);
 588                 if (ret < 0) {
 589                         if (errno == EADDRNOTAVAIL && (doalias >= 0)) {
 590                                 /* means no previous address for interface */
 591                         } else
 592                                 Perror("ioctl (SIOCDIFADDR)");
 593                 }
 594         }
 595         if (newaddr) {
 596                 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) {
 597                         warnx("interface %s cannot change %s addresses!",
 598                               name, afp->af_name);
 599                         newaddr = 0;
 600                 }
 601         }
 602         if (newaddr && (setaddr || setmask)) {
 603                 strncpy(afp->af_addreq, name, sizeof ifr.ifr_name);
 604                 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0)
 605                         Perror("ioctl (SIOCAIFADDR)");
 606         }
 607
 608         close(s);
 609         return(0);
 610 }
 611
 612 /*ARGSUSED*/
 613 static void
 614 setifaddr(const char *addr, int param, int s, const struct afswtch *afp)
 615 {
 616         if (afp->af_getaddr == NULL)
 617                 return;
 618         /*
 619          * Delay the ioctl to set the interface addr until flags are all set.
 620          * The address interpretation may depend on the flags,
 621          * and the flags may change when the address is set.
 622          */
 623         setaddr++;
 624         if (doalias == 0 && afp->af_af != AF_LINK)
 625                 clearaddr = 1;
 626         afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR));
 627 }
 628
 629 static void
 630 settunnel(const char *src, const char *dst, int s, const struct afswtch *afp)
 631 {
 632         struct addrinfo *srcres, *dstres;
 633         int ecode;
 634
 635         if (afp->af_settunnel == NULL) {
 636                 warn("address family %s does not support tunnel setup",
 637                         afp->af_name);
 638                 return;
 639         }
 640
 641         if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0)
 642                 errx(1, "error in parsing address string: %s",
 643                     gai_strerror(ecode));
 644
 645         if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0)
 646                 errx(1, "error in parsing address string: %s",
 647                     gai_strerror(ecode));
 648
 649         if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family)
 650                 errx(1,
 651                     "source and destination address families do not match");
 652
 653         afp->af_settunnel(s, srcres, dstres);
 654
 655         freeaddrinfo(srcres);
 656         freeaddrinfo(dstres);
 657 }
 658
 659 /* ARGSUSED */
 660 static void
 661 deletetunnel(const char *vname, int param, int s, const struct afswtch *afp)
 662 {
 663
 664         if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0)
 665                 err(1, "SIOCDIFPHYADDR");
 666 }
 667
 668 static void
 669 setifnetmask(const char *addr, int dummy __unused, int s,
 670     const struct afswtch *afp)
 671 {
 672         if (afp->af_getaddr != NULL) {
 673                 setmask++;
 674                 afp->af_getaddr(addr, MASK);
 675         }
 676 }
 677
 678 static void
 679 setifbroadaddr(const char *addr, int dummy __unused, int s,
 680     const struct afswtch *afp)
 681 {
 682         if (afp->af_getaddr != NULL)
 683                 afp->af_getaddr(addr, DSTADDR);
 684 }
 685
 686 static void
 687 setifipdst(const char *addr, int dummy __unused, int s,
 688     const struct afswtch *afp)
 689 {
 690         const struct afswtch *inet;
 691
 692         inet = af_getbyname("inet");
 693         if (inet == NULL)
 694                 return;
 695         inet->af_getaddr(addr, DSTADDR);
 696         clearaddr = 0;
 697         newaddr = 0;
 698 }
 699
 700 static void
 701 notealias(const char *addr, int param, int s, const struct afswtch *afp)
 702 {
 703 #define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr))
 704         if (setaddr && doalias == 0 && param < 0)
 705                 if (afp->af_addreq != NULL && afp->af_ridreq != NULL)
 706                         bcopy((caddr_t)rqtosa(af_addreq),
 707                               (caddr_t)rqtosa(af_ridreq),
 708                               rqtosa(af_addreq)->sa_len);
 709         doalias = param;
 710         if (param < 0) {
 711                 clearaddr = 1;
 712                 newaddr = 0;
 713         } else
 714                 clearaddr = 0;
 715 #undef rqtosa
 716 }
 717
 718 /*ARGSUSED*/
 719 static void
 720 setifdstaddr(const char *addr, int param __unused, int s,
 721     const struct afswtch *afp)
 722 {
 723         if (afp->af_getaddr != NULL)
 724                 afp->af_getaddr(addr, DSTADDR);
 725 }
 726
 727 /*
 728  * Note: doing an SIOCIGIFFLAGS scribbles on the union portion
 729  * of the ifreq structure, which may confuse other parts of ifconfig.
 730  * Make a private copy so we can avoid that.
 731  */
 732 static void
 733 setifflags(const char *vname, int value, int s, const struct afswtch *afp)
 734 {
 735         struct ifreq            my_ifr;
 736         int flags;
 737
 738         bcopy((char *)&ifr, (char *)&my_ifr, sizeof(struct ifreq));
 739
 740         if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) {
 741                 Perror("ioctl (SIOCGIFFLAGS)");
 742                 exit(1);
 743         }
 744         strncpy(my_ifr.ifr_name, name, sizeof (my_ifr.ifr_name));
 745         flags = my_ifr.ifr_flags;
 746
 747         if (value < 0) {
 748                 value = -value;
 749                 flags &= ~value;
 750         } else
 751                 flags |= value;
 752         my_ifr.ifr_flags = flags & 0xffff;
 753         if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
 754                 Perror(vname);
 755 }
 756
 757 #ifdef SIOCGIFCAP
 758 void
 759 setifcap(const char *vname, int value, int s, const struct afswtch *afp)
 760 {
 761         int flags;
 762
 763         if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) {
 764                 Perror("ioctl (SIOCGIFCAP)");
 765                 exit(1);
 766         }
 767         flags = ifr.ifr_curcap;
 768         if (value < 0) {
 769                 value = -value;
 770                 flags &= ~value;
 771         } else
 772                 flags |= value;
 773         flags &= ifr.ifr_reqcap;
 774         ifr.ifr_reqcap = flags;
 775         if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0)
 776                 Perror(vname);
 777 }
 778 #endif
 779
 780 static void
 781 setifmetric(const char *val, int dummy __unused, int s,
 782     const struct afswtch *afp)
 783 {
 784         strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
 785         ifr.ifr_metric = atoi(val);
 786         if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0)
 787                 warn("ioctl (set metric)");
 788 }
 789
 790 static void
 791 setifmtu(const char *val, int dummy __unused, int s,
 792     const struct afswtch *afp)
 793 {
 794         strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
 795         ifr.ifr_mtu = atoi(val);
 796         if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0)
 797                 warn("ioctl (set mtu)");
 798 }
 799
 800 #ifndef __APPLE__
 801 static void
 802 setifname(const char *val, int dummy __unused, int s,
 803     const struct afswtch *afp)
 804 {
 805         char *newname;
 806
 807         newname = strdup(val);
 808         if (newname == NULL) {
 809                 warn("no memory to set ifname");
 810                 return;
 811         }
 812         ifr.ifr_data = newname;
 813         if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
 814                 warn("ioctl (set name)");
 815                 free(newname);
 816                 return;
 817         }
 818         strlcpy(name, newname, sizeof(name));
 819         free(newname);
 820 }
 821 #endif
 822
 823 #define IFFBITS \
 824 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \
 825 "\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \
 826 "\20MULTICAST"
 827
 828 #define IFCAPBITS \
 829 "\020\1RXCSUM\2TXCSUM\3VLAN_MTU\4VLAN_HWTAGGING\5JUMBO_MTU" \
 830 "\6TSO4\7TSO6\10LRO\11AV"
 831
 832 /*
 833  * Print the status of the interface.  If an address family was
 834  * specified, show only it; otherwise, show them all.
 835  */
 836 static void
 837 status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
 838         struct ifaddrs *ifa)
 839 {
 840         struct ifaddrs *ift;
 841         int allfamilies, s;
 842         struct ifstat ifs;
 843
 844         if (afp == NULL) {
 845                 allfamilies = 1;
 846                 afp = af_getbyname("inet");
 847         } else
 848                 allfamilies = 0;
 849
 850         ifr.ifr_addr.sa_family = afp->af_af == AF_LINK ? AF_INET : afp->af_af;
 851         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 852
 853         s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0);
 854         if (s < 0)
 855                 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family);
 856
 857         printf("%s: ", name);
 858         printb("flags", ifa->ifa_flags, IFFBITS);
 859         if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1)
 860                 if (ifr.ifr_metric)
 861                         printf(" metric %d", ifr.ifr_metric);
 862         if (ioctl(s, SIOCGIFMTU, &ifr) != -1)
 863                 printf(" mtu %d", ifr.ifr_mtu);
 864 #ifdef SIOCGIFGETRTREFCNT
 865         if (showrtref && ioctl(s, SIOCGIFGETRTREFCNT, &ifr) != -1)
 866                 printf(" rtref %d", ifr.ifr_route_refcnt);
 867 #endif
 868         putchar('\n');
 869
 870 #ifdef SIOCGIFCAP
 871         if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) {
 872                 if (ifr.ifr_curcap != 0) {
 873                         printb("\toptions", ifr.ifr_curcap, IFCAPBITS);
 874                         putchar('\n');
 875                 }
 876                 if (supmedia && ifr.ifr_reqcap != 0) {
 877                         printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS);
 878                         putchar('\n');
 879                 }
 880         }
 881 #endif
 882
 883         tunnel_status(s);
 884
 885         for (ift = ifa; ift != NULL; ift = ift->ifa_next) {
 886                 if (ift->ifa_addr == NULL)
 887                         continue;
 888                 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0)
 889                         continue;
 890                 if (allfamilies) {
 891                         const struct afswtch *p;
 892                         p = af_getbyfamily(ift->ifa_addr->sa_family);
 893                         if (p != NULL && p->af_status != NULL)
 894                                 p->af_status(s, ift);
 895                 } else if (afp->af_af == ift->ifa_addr->sa_family)
 896                         afp->af_status(s, ift);
 897         }
 898 #if 0
 899         if (allfamilies || afp->af_af == AF_LINK) {
 900                 const struct afswtch *lafp;
 901
 902                 /*
 903                  * Hack; the link level address is received separately
 904                  * from the routing information so any address is not
 905                  * handled above.  Cobble together an entry and invoke
 906                  * the status method specially.
 907                  */
 908                 lafp = af_getbyname("lladdr");
 909                 if (lafp != NULL) {
 910                         info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl;
 911                         lafp->af_status(s, &info);
 912                 }
 913         }
 914 #endif
 915         if (allfamilies)
 916                 af_other_status(s);
 917         else if (afp->af_other_status != NULL)
 918                 afp->af_other_status(s);
 919
 920         strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name);
 921         if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0)
 922                 printf("%s", ifs.ascii);
 923
 924         close(s);
 925         return;
 926 }
 927
 928 static void
 929 tunnel_status(int s)
 930 {
 931         af_all_tunnel_status(s);
 932 }
 933
 934 void
 935 Perror(const char *cmd)
 936 {
 937         switch (errno) {
 938
 939         case ENXIO:
 940                 errx(1, "%s: no such interface", cmd);
 941                 break;
 942
 943         case EPERM:
 944                 errx(1, "%s: permission denied", cmd);
 945                 break;
 946
 947         default:
 948                 err(1, "%s", cmd);
 949         }
 950 }
 951
 952 /*
 953  * Print a value a la the %b format of the kernel's printf
 954  */
 955 void
 956 printb(const char *s, unsigned v, const char *bits)
 957 {
 958         int i, any = 0;
 959         char c;
 960
 961         if (bits && *bits == 8)
 962                 printf("%s=%o", s, v);
 963         else
 964                 printf("%s=%x", s, v);
 965         bits++;
 966         if (bits) {
 967                 putchar('<');
 968                 while ((i = *bits++) != '\0') {
 969                         if (v & (1 << (i-1))) {
 970                                 if (any)
 971                                         putchar(',');
 972                                 any = 1;
 973                                 for (; (c = *bits) > 32; bits++)
 974                                         putchar(c);
 975                         } else
 976                                 for (; *bits > 32; bits++)
 977                                         ;
 978                 }
 979                 putchar('>');
 980         }
 981 }
 982
 983 #ifndef __APPLE__
 984 void
 985 ifmaybeload(const char *name)
 986 {
 987 #define MOD_PREFIX_LEN          3       /* "if_" */
 988         struct module_stat mstat;
 989         int fileid, modid;
 990         char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp;
 991         const char *cp;
 992
 993         /* loading suppressed by the user */
 994         if (noload)
 995                 return;
 996
 997         /* trim the interface number off the end */
 998         strlcpy(ifname, name, sizeof(ifname));
 999         for (dp = ifname; *dp != 0; dp++)
1000                 if (isdigit(*dp)) {
1001                         *dp = 0;
1002                         break;
1003                 }
1004
1005         /* turn interface and unit into module name */
1006         strlcpy(ifkind, "if_", sizeof(ifkind));
1007         strlcpy(ifkind + MOD_PREFIX_LEN, ifname,
1008             sizeof(ifkind) - MOD_PREFIX_LEN);
1009
1010         /* scan files in kernel */
1011         mstat.version = sizeof(struct module_stat);
1012         for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) {
1013                 /* scan modules in file */
1014                 for (modid = kldfirstmod(fileid); modid > 0;
1015                      modid = modfnext(modid)) {
1016                         if (modstat(modid, &mstat) < 0)
1017                                 continue;
1018                         /* strip bus name if present */
1019                         if ((cp = strchr(mstat.name, '/')) != NULL) {
1020                                 cp++;
1021                         } else {
1022                                 cp = mstat.name;
1023                         }
1024                         /* already loaded? */
1025                         if (strncmp(ifname, cp, strlen(ifname) + 1) == 0 ||
1026                             strncmp(ifkind, cp, strlen(ifkind) + 1) == 0)
1027                                 return;
1028                 }
1029         }
1030
1031         /* not present, we should try to load it */
1032         kldload(ifkind);
1033 }
1034 #endif
1035
1036 static struct cmd basic_cmds[] = {
1037         DEF_CMD("up",           IFF_UP,         setifflags),
1038         DEF_CMD("down",         -IFF_UP,        setifflags),
1039         DEF_CMD("arp",          -IFF_NOARP,     setifflags),
1040         DEF_CMD("-arp",         IFF_NOARP,      setifflags),
1041         DEF_CMD("debug",        IFF_DEBUG,      setifflags),
1042         DEF_CMD("-debug",       -IFF_DEBUG,     setifflags),
1043 #ifdef IFF_PPROMISC
1044         DEF_CMD("promisc",      IFF_PPROMISC,   setifflags),
1045         DEF_CMD("-promisc",     -IFF_PPROMISC,  setifflags),
1046 #endif /* IFF_PPROMISC */
1047         DEF_CMD("add",          IFF_UP,         notealias),
1048         DEF_CMD("alias",        IFF_UP,         notealias),
1049         DEF_CMD("-alias",       -IFF_UP,        notealias),
1050         DEF_CMD("delete",       -IFF_UP,        notealias),
1051         DEF_CMD("remove",       -IFF_UP,        notealias),
1052 #ifdef notdef
1053 #define EN_SWABIPS      0x1000
1054         DEF_CMD("swabips",      EN_SWABIPS,     setifflags),
1055         DEF_CMD("-swabips",     -EN_SWABIPS,    setifflags),
1056 #endif
1057         DEF_CMD_ARG("netmask",                  setifnetmask),
1058         DEF_CMD_ARG("metric",                   setifmetric),
1059         DEF_CMD_ARG("broadcast",                setifbroadaddr),
1060         DEF_CMD_ARG("ipdst",                    setifipdst),
1061         DEF_CMD_ARG2("tunnel",                  settunnel),
1062         DEF_CMD("-tunnel", 0,                   deletetunnel),
1063         DEF_CMD("deletetunnel", 0,              deletetunnel),
1064         DEF_CMD("link0",        IFF_LINK0,      setifflags),
1065         DEF_CMD("-link0",       -IFF_LINK0,     setifflags),
1066         DEF_CMD("link1",        IFF_LINK1,      setifflags),
1067         DEF_CMD("-link1",       -IFF_LINK1,     setifflags),
1068         DEF_CMD("link2",        IFF_LINK2,      setifflags),
1069         DEF_CMD("-link2",       -IFF_LINK2,     setifflags),
1070 #ifdef IFF_MONITOR
1071         DEF_CMD("monitor",      IFF_MONITOR:,   setifflags),
1072         DEF_CMD("-monitor",     -IFF_MONITOR,   setifflags),
1073 #endif /* IFF_MONITOR */
1074 #ifdef IFF_STATICARP
1075         DEF_CMD("staticarp",    IFF_STATICARP,  setifflags),
1076         DEF_CMD("-staticarp",   -IFF_STATICARP, setifflags),
1077 #endif /* IFF_STATICARP */
1078 #ifdef IFCAP_RXCSUM
1079         DEF_CMD("rxcsum",       IFCAP_RXCSUM,   setifcap),
1080         DEF_CMD("-rxcsum",      -IFCAP_RXCSUM,  setifcap),
1081 #endif /* IFCAP_RXCSUM */
1082 #ifdef IFCAP_TXCSUM
1083         DEF_CMD("txcsum",       IFCAP_TXCSUM,   setifcap),
1084         DEF_CMD("-txcsum",      -IFCAP_TXCSUM,  setifcap),
1085 #endif /* IFCAP_TXCSUM */
1086 #ifdef IFCAP_NETCONS
1087         DEF_CMD("netcons",      IFCAP_NETCONS,  setifcap),
1088         DEF_CMD("-netcons",     -IFCAP_NETCONS, setifcap),
1089 #endif /* IFCAP_NETCONS */
1090 #ifdef IFCAP_POLLING
1091         DEF_CMD("polling",      IFCAP_POLLING,  setifcap),
1092         DEF_CMD("-polling",     -IFCAP_POLLING, setifcap),
1093 #endif /* IFCAP_POLLING */
1094 #ifdef IFCAP_TSO
1095         DEF_CMD("tso",          IFCAP_TSO,      setifcap),
1096         DEF_CMD("-tso",         -IFCAP_TSO,     setifcap),
1097 #endif /* IFCAP_TSO */
1098 #ifdef IFCAP_LRO
1099         DEF_CMD("lro",          IFCAP_LRO,      setifcap),
1100         DEF_CMD("-lro",         -IFCAP_LRO,     setifcap),
1101 #endif /* IFCAP_LRO */
1102 #ifdef IFCAP_WOL
1103         DEF_CMD("wol",          IFCAP_WOL,      setifcap),
1104         DEF_CMD("-wol",         -IFCAP_WOL,     setifcap),
1105 #endif /* IFCAP_WOL */
1106 #ifdef IFCAP_WOL_UCAST
1107         DEF_CMD("wol_ucast",    IFCAP_WOL_UCAST,        setifcap),
1108         DEF_CMD("-wol_ucast",   -IFCAP_WOL_UCAST,       setifcap),
1109 #endif /* IFCAP_WOL_UCAST */
1110 #ifdef IFCAP_WOL_MCAST
1111         DEF_CMD("wol_mcast",    IFCAP_WOL_MCAST,        setifcap),
1112         DEF_CMD("-wol_mcast",   -IFCAP_WOL_MCAST,       setifcap),
1113 #endif /* IFCAP_WOL_MCAST */
1114 #ifdef IFCAP_WOL_MAGIC
1115         DEF_CMD("wol_magic",    IFCAP_WOL_MAGIC,        setifcap),
1116         DEF_CMD("-wol_magic",   -IFCAP_WOL_MAGIC,       setifcap),
1117 #endif /* IFCAP_WOL_MAGIC */
1118         DEF_CMD("normal",       -IFF_LINK0,     setifflags),
1119         DEF_CMD("compress",     IFF_LINK0,      setifflags),
1120         DEF_CMD("noicmp",       IFF_LINK1,      setifflags),
1121         DEF_CMD_ARG("mtu",                      setifmtu),
1122 #ifdef notdef
1123         DEF_CMD_ARG("name",                     setifname),
1124 #endif /* notdef */
1125 #ifdef IFCAP_AV
1126         DEF_CMD("av", IFCAP_AV, setifcap),
1127         DEF_CMD("-av", -IFCAP_AV, setifcap),
1128 #endif /* IFCAP_AV */
1129 };
1130
1131 static __constructor void
1132 ifconfig_ctor(void)
1133 {
1134 #define N(a)    (sizeof(a) / sizeof(a[0]))
1135         int i;
1136
1137         for (i = 0; i < N(basic_cmds);  i++)
1138                 cmd_register(&basic_cmds[i]);
1139 #undef N
1140 }