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