sbin/ifconfig/ifmedia.c

   1 /*      $NetBSD: ifconfig.c,v 1.34 1997/04/21 01:17:58 lukem Exp $      */
   2 /* $FreeBSD: src/sbin/ifconfig/ifmedia.c,v 1.19.2.1 2006/03/01 22:24:23 glebius Exp $ */
   3 /* $DragonFly: src/sbin/ifconfig/ifmedia.c,v 1.11 2007/08/16 20:03:55 dillon Exp $ */
   4
   5 /*
   6  * Copyright (c) 1997 Jason R. Thorpe.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project
  20  *      by Jason R. Thorpe.
  21  * 4. The name of the author may not be used to endorse or promote products
  22  *    derived from this software without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  25  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  27  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  29  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  30  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  31  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  32  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 /*
  38  * Copyright (c) 1983, 1993
  39  *      The Regents of the University of California.  All rights reserved.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *      This product includes software developed by the University of
  52  *      California, Berkeley and its contributors.
  53  * 4. Neither the name of the University nor the names of its contributors
  54  *    may be used to endorse or promote products derived from this software
  55  *    without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  58  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  59  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  60  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  61  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  62  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  63  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  64  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  65  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  66  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  67  * SUCH DAMAGE.
  68  */
  69
  70 #include <sys/param.h>
  71 #include <sys/ioctl.h>
  72 #include <sys/socket.h>
  73 #include <sys/sysctl.h>
  74 #include <sys/time.h>
  75
  76 #include <net/if.h>
  77 #include <net/if_dl.h>
  78 #include <net/if_types.h>
  79 #include <net/if_media.h>
  80 #include <net/route.h>
  81
  82 #include <ctype.h>
  83 #include <err.h>
  84 #include <errno.h>
  85 #include <fcntl.h>
  86 #include <stdio.h>
  87 #include <stdlib.h>
  88 #include <string.h>
  89 #include <unistd.h>
  90
  91 #include "ifconfig.h"
  92
  93 static void     domediaopt(const char *, int, int);
  94 static int      get_media_subtype(int, const char *);
  95 static int      get_media_mode(int, const char *);
  96 static int      get_media_options(int, const char *);
  97 static int      lookup_media_word(struct ifmedia_description *, const char *);
  98 static void     print_media_word(int, int);
  99 static void     print_media_word_ifconfig(int);
 100
 101 static struct ifmedia_description *get_toptype_desc(int);
 102 static struct ifmedia_type_to_subtype *get_toptype_ttos(int);
 103 static struct ifmedia_description *get_subtype_desc(int,
 104     struct ifmedia_type_to_subtype *ttos);
 105
 106 static void
 107 media_status(int s)
 108 {
 109         struct ifmediareq ifmr;
 110         int *media_list, i;
 111
 112         memset(&ifmr, 0, sizeof(ifmr));
 113         strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 114
 115         if (ioctl(s, SIOCGIFMEDIA, &ifmr) < 0) {
 116                 /*
 117                  * Interface doesn't support SIOC{G,S}IFMEDIA.
 118                  */
 119                 return;
 120         }
 121
 122         if (ifmr.ifm_count == 0) {
 123                 warnx("%s: no media types?", name);
 124                 return;
 125         }
 126
 127         media_list = malloc(ifmr.ifm_count * sizeof(int));
 128         if (media_list == NULL)
 129                 err(1, "malloc");
 130         ifmr.ifm_ulist = media_list;
 131
 132         if (ioctl(s, SIOCGIFMEDIA, &ifmr) < 0)
 133                 err(1, "SIOCGIFMEDIA");
 134
 135         printf("\tmedia: ");
 136         print_media_word(ifmr.ifm_current, 1);
 137         if (ifmr.ifm_active != ifmr.ifm_current) {
 138                 putchar(' ');
 139                 putchar('(');
 140                 print_media_word(ifmr.ifm_active, 0);
 141                 putchar(')');
 142         }
 143
 144         putchar('\n');
 145
 146         if (ifmr.ifm_status & IFM_AVALID) {
 147                 printf("\tstatus: ");
 148                 switch (IFM_TYPE(ifmr.ifm_active)) {
 149                 case IFM_ETHER:
 150                         if (ifmr.ifm_status & IFM_ACTIVE)
 151                                 printf("active");
 152                         else
 153                                 printf("no carrier");
 154                         break;
 155
 156                 case IFM_FDDI:
 157                 case IFM_TOKEN:
 158                         if (ifmr.ifm_status & IFM_ACTIVE)
 159                                 printf("inserted");
 160                         else
 161                                 printf("no ring");
 162                         break;
 163
 164                 case IFM_ATM:
 165                         if (ifmr.ifm_status & IFM_ACTIVE)
 166                                 printf("active");
 167                         else
 168                                 printf("no carrier");
 169                         break;
 170
 171                 case IFM_IEEE80211:
 172                         /* XXX: Different value for adhoc? */
 173                         if (ifmr.ifm_status & IFM_ACTIVE)
 174                                 printf("associated");
 175                         else
 176                                 printf("no carrier");
 177                         break;
 178                 case IFM_CARP:
 179                         if (ifmr.ifm_status & IFM_ACTIVE)
 180                                 printf("master");
 181                         else
 182                                 printf("backup");
 183                         break;
 184                 }
 185                 putchar('\n');
 186         }
 187
 188         if (ifmr.ifm_count > 0 && supmedia) {
 189                 printf("\tsupported media:\n");
 190                 for (i = 0; i < ifmr.ifm_count; i++) {
 191                         printf("\t\t");
 192                         print_media_word_ifconfig(media_list[i]);
 193                         putchar('\n');
 194                 }
 195         }
 196
 197         free(media_list);
 198 }
 199
 200 static struct ifmediareq *
 201 getifmediastate(int s)
 202 {
 203         static struct ifmediareq *ifmr = NULL;
 204         int *mwords;
 205
 206         if (ifmr == NULL) {
 207                 ifmr = (struct ifmediareq *)malloc(sizeof(struct ifmediareq));
 208                 if (ifmr == NULL)
 209                         err(1, "malloc");
 210
 211                 (void) memset(ifmr, 0, sizeof(struct ifmediareq));
 212                 (void) strncpy(ifmr->ifm_name, name,
 213                     sizeof(ifmr->ifm_name));
 214
 215                 ifmr->ifm_count = 0;
 216                 ifmr->ifm_ulist = NULL;
 217
 218                 /*
 219                  * We must go through the motions of reading all
 220                  * supported media because we need to know both
 221                  * the current media type and the top-level type.
 222                  */
 223
 224                 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0) {
 225                         err(1, "SIOCGIFMEDIA");
 226                 }
 227
 228                 if (ifmr->ifm_count == 0)
 229                         errx(1, "%s: no media types?", name);
 230
 231                 mwords = (int *)malloc(ifmr->ifm_count * sizeof(int));
 232                 if (mwords == NULL)
 233                         err(1, "malloc");
 234
 235                 ifmr->ifm_ulist = mwords;
 236                 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0)
 237                         err(1, "SIOCGIFMEDIA");
 238         }
 239
 240         return ifmr;
 241 }
 242
 243 static void
 244 setifmediacallback(int s, void *arg)
 245 {
 246         struct ifmediareq *ifmr = (struct ifmediareq *)arg;
 247         static int did_it = 0;
 248
 249         if (!did_it) {
 250                 ifr.ifr_media = ifmr->ifm_current;
 251                 if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
 252                         err(1, "SIOCSIFMEDIA (media)");
 253                 free(ifmr->ifm_ulist);
 254                 free(ifmr);
 255                 did_it = 1;
 256         }
 257 }
 258
 259 static void
 260 setmedia(const char *val, int d, int s, const struct afswtch *afp)
 261 {
 262         struct ifmediareq *ifmr;
 263         int subtype;
 264
 265
 266         ifmr = getifmediastate(s);
 267
 268         /*
 269          * We are primarily concerned with the top-level type.
 270          * However, "current" may be only IFM_NONE, so we just look
 271          * for the top-level type in the first "supported type"
 272          * entry.
 273          *
 274          * (I'm assuming that all supported media types for a given
 275          * interface will be the same top-level type..)
 276          */
 277         subtype = get_media_subtype(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 278
 279         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 280         ifr.ifr_media = (ifmr->ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
 281             IFM_TYPE(ifmr->ifm_ulist[0]) | subtype;
 282
 283         if ((ifr.ifr_media & IFM_TMASK) == 0) {
 284                 ifr.ifr_media &= ~IFM_GMASK;
 285         }
 286
 287         ifmr->ifm_current = ifr.ifr_media;
 288         callback_register(setifmediacallback, (void *)ifmr);
 289 }
 290
 291 static void
 292 setmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 293 {
 294
 295         domediaopt(val, 0, s);
 296 }
 297
 298 static void
 299 unsetmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 300 {
 301
 302         domediaopt(val, 1, s);
 303 }
 304
 305 static void
 306 domediaopt(const char *val, int clear, int s)
 307 {
 308         struct ifmediareq *ifmr;
 309         int options;
 310
 311         ifmr = getifmediastate(s);
 312
 313         options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 314
 315         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 316         ifr.ifr_media = ifmr->ifm_current;
 317         if (clear)
 318                 ifr.ifr_media &= ~options;
 319         else
 320                 ifr.ifr_media |= options;
 321
 322         ifmr->ifm_current = ifr.ifr_media;
 323         callback_register(setifmediacallback, (void *)ifmr);
 324 }
 325
 326
 327 static void
 328 setmediamode(const char *val, int d, int s, const struct afswtch *afp)
 329 {
 330         struct ifmediareq *ifmr;
 331         int mode;
 332
 333         ifmr = getifmediastate(s);
 334
 335         mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 336
 337         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 338         ifr.ifr_media = (ifmr->ifm_current & ~IFM_MMASK) | mode;
 339
 340         ifmr->ifm_current = ifr.ifr_media;
 341         callback_register(setifmediacallback, (void *)ifmr);
 342 }
 343
 344 /**********************************************************************
 345  * A good chunk of this is duplicated from sys/net/ifmedia.c
 346  **********************************************************************/
 347
 348 static struct ifmedia_description ifm_type_descriptions[] =
 349     IFM_TYPE_DESCRIPTIONS;
 350
 351 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
 352     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
 353
 354 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
 355     IFM_SUBTYPE_ETHERNET_ALIASES;
 356
 357 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
 358     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
 359
 360 static struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
 361     IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
 362
 363 static struct ifmedia_description ifm_subtype_tokenring_aliases[] =
 364     IFM_SUBTYPE_TOKENRING_ALIASES;
 365
 366 static struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
 367     IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
 368
 369 static struct ifmedia_description ifm_subtype_fddi_descriptions[] =
 370     IFM_SUBTYPE_FDDI_DESCRIPTIONS;
 371
 372 static struct ifmedia_description ifm_subtype_fddi_aliases[] =
 373     IFM_SUBTYPE_FDDI_ALIASES;
 374
 375 static struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
 376     IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
 377
 378 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
 379     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
 380
 381 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
 382     IFM_SUBTYPE_IEEE80211_ALIASES;
 383
 384 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
 385     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
 386
 387 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
 388     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
 389
 390 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
 391     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
 392
 393 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
 394     IFM_SUBTYPE_ATM_DESCRIPTIONS;
 395
 396 static struct ifmedia_description ifm_subtype_atm_aliases[] =
 397     IFM_SUBTYPE_ATM_ALIASES;
 398
 399 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
 400     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
 401
 402 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
 403     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
 404
 405 static struct ifmedia_description ifm_subtype_shared_aliases[] =
 406     IFM_SUBTYPE_SHARED_ALIASES;
 407
 408 static struct ifmedia_description ifm_shared_option_descriptions[] =
 409     IFM_SHARED_OPTION_DESCRIPTIONS;
 410
 411 struct ifmedia_type_to_subtype {
 412         struct {
 413                 struct ifmedia_description *desc;
 414                 int alias;
 415         } subtypes[5];
 416         struct {
 417                 struct ifmedia_description *desc;
 418                 int alias;
 419         } options[3];
 420         struct {
 421                 struct ifmedia_description *desc;
 422                 int alias;
 423         } modes[3];
 424 };
 425
 426 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
 427 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
 428         {
 429                 {
 430                         { &ifm_subtype_shared_descriptions[0], 0 },
 431                         { &ifm_subtype_shared_aliases[0], 1 },
 432                         { &ifm_subtype_ethernet_descriptions[0], 0 },
 433                         { &ifm_subtype_ethernet_aliases[0], 1 },
 434                         { NULL, 0 },
 435                 },
 436                 {
 437                         { &ifm_shared_option_descriptions[0], 0 },
 438                         { &ifm_subtype_ethernet_option_descriptions[0], 0 },
 439                         { NULL, 0 },
 440                 },
 441                 {
 442                         { NULL, 0 },
 443                 },
 444         },
 445         {
 446                 {
 447                         { &ifm_subtype_shared_descriptions[0], 0 },
 448                         { &ifm_subtype_shared_aliases[0], 1 },
 449                         { &ifm_subtype_tokenring_descriptions[0], 0 },
 450                         { &ifm_subtype_tokenring_aliases[0], 1 },
 451                         { NULL, 0 },
 452                 },
 453                 {
 454                         { &ifm_shared_option_descriptions[0], 0 },
 455                         { &ifm_subtype_tokenring_option_descriptions[0], 0 },
 456                         { NULL, 0 },
 457                 },
 458                 {
 459                         { NULL, 0 },
 460                 },
 461         },
 462         {
 463                 {
 464                         { &ifm_subtype_shared_descriptions[0], 0 },
 465                         { &ifm_subtype_shared_aliases[0], 1 },
 466                         { &ifm_subtype_fddi_descriptions[0], 0 },
 467                         { &ifm_subtype_fddi_aliases[0], 1 },
 468                         { NULL, 0 },
 469                 },
 470                 {
 471                         { &ifm_shared_option_descriptions[0], 0 },
 472                         { &ifm_subtype_fddi_option_descriptions[0], 0 },
 473                         { NULL, 0 },
 474                 },
 475                 {
 476                         { NULL, 0 },
 477                 },
 478         },
 479         {
 480                 {
 481                         { &ifm_subtype_shared_descriptions[0], 0 },
 482                         { &ifm_subtype_shared_aliases[0], 1 },
 483                         { &ifm_subtype_ieee80211_descriptions[0], 0 },
 484                         { &ifm_subtype_ieee80211_aliases[0], 1 },
 485                         { NULL, 0 },
 486                 },
 487                 {
 488                         { &ifm_shared_option_descriptions[0], 0 },
 489                         { &ifm_subtype_ieee80211_option_descriptions[0], 0 },
 490                         { NULL, 0 },
 491                 },
 492                 {
 493                         { &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
 494                         { &ifm_subtype_ieee80211_mode_aliases[0], 0 },
 495                         { NULL, 0 },
 496                 },
 497         },
 498         {
 499                 {
 500                         { &ifm_subtype_shared_descriptions[0], 0 },
 501                         { &ifm_subtype_shared_aliases[0], 1 },
 502                         { &ifm_subtype_atm_descriptions[0], 0 },
 503                         { &ifm_subtype_atm_aliases[0], 1 },
 504                         { NULL, 0 },
 505                 },
 506                 {
 507                         { &ifm_shared_option_descriptions[0], 0 },
 508                         { &ifm_subtype_atm_option_descriptions[0], 0 },
 509                         { NULL, 0 },
 510                 },
 511                 {
 512                         { NULL, 0 },
 513                 },
 514         },
 515 };
 516
 517 static int
 518 get_media_subtype(int type, const char *val)
 519 {
 520         struct ifmedia_description *desc;
 521         struct ifmedia_type_to_subtype *ttos;
 522         int rval, i;
 523
 524         /* Find the top-level interface type. */
 525         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 526             desc->ifmt_string != NULL; desc++, ttos++)
 527                 if (type == desc->ifmt_word)
 528                         break;
 529         if (desc->ifmt_string == NULL)
 530                 errx(1, "unknown media type 0x%x", type);
 531
 532         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 533                 rval = lookup_media_word(ttos->subtypes[i].desc, val);
 534                 if (rval != -1)
 535                         return (rval);
 536         }
 537         errx(1, "unknown media subtype: %s", val);
 538         /*NOTREACHED*/
 539 }
 540
 541 static int
 542 get_media_mode(int type, const char *val)
 543 {
 544         struct ifmedia_description *desc;
 545         struct ifmedia_type_to_subtype *ttos;
 546         int rval, i;
 547
 548         /* Find the top-level interface type. */
 549         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 550             desc->ifmt_string != NULL; desc++, ttos++)
 551                 if (type == desc->ifmt_word)
 552                         break;
 553         if (desc->ifmt_string == NULL)
 554                 errx(1, "unknown media mode 0x%x", type);
 555
 556         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 557                 rval = lookup_media_word(ttos->modes[i].desc, val);
 558                 if (rval != -1)
 559                         return (rval);
 560         }
 561         return -1;
 562 }
 563
 564 static int
 565 get_media_options(int type, const char *val)
 566 {
 567         struct ifmedia_description *desc;
 568         struct ifmedia_type_to_subtype *ttos;
 569         char *optlist, *optptr;
 570         int option = 0, i, rval = 0;
 571
 572         /* We muck with the string, so copy it. */
 573         optlist = strdup(val);
 574         if (optlist == NULL)
 575                 err(1, "strdup");
 576
 577         /* Find the top-level interface type. */
 578         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 579             desc->ifmt_string != NULL; desc++, ttos++)
 580                 if (type == desc->ifmt_word)
 581                         break;
 582         if (desc->ifmt_string == NULL)
 583                 errx(1, "unknown media type 0x%x", type);
 584
 585         /*
 586          * Look up the options in the user-provided comma-separated
 587          * list.
 588          */
 589         optptr = optlist;
 590         for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
 591                 for (i = 0; ttos->options[i].desc != NULL; i++) {
 592                         option = lookup_media_word(ttos->options[i].desc, optptr);
 593                         if (option != -1)
 594                                 break;
 595                 }
 596                 if (option == 0)
 597                         errx(1, "unknown option: %s", optptr);
 598                 rval |= option;
 599         }
 600
 601         free(optlist);
 602         return (rval);
 603 }
 604
 605 static int
 606 lookup_media_word(struct ifmedia_description *desc, const char *val)
 607 {
 608
 609         for (; desc->ifmt_string != NULL; desc++)
 610                 if (strcasecmp(desc->ifmt_string, val) == 0)
 611                         return (desc->ifmt_word);
 612
 613         return (-1);
 614 }
 615
 616 static struct ifmedia_description *get_toptype_desc(int ifmw)
 617 {
 618         struct ifmedia_description *desc;
 619
 620         for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
 621                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 622                         break;
 623
 624         return desc;
 625 }
 626
 627 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
 628 {
 629         struct ifmedia_description *desc;
 630         struct ifmedia_type_to_subtype *ttos;
 631
 632         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 633             desc->ifmt_string != NULL; desc++, ttos++)
 634                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 635                         break;
 636
 637         return ttos;
 638 }
 639
 640 static struct ifmedia_description *get_subtype_desc(int ifmw,
 641     struct ifmedia_type_to_subtype *ttos)
 642 {
 643         int i;
 644         struct ifmedia_description *desc;
 645
 646         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 647                 if (ttos->subtypes[i].alias)
 648                         continue;
 649                 for (desc = ttos->subtypes[i].desc;
 650                     desc->ifmt_string != NULL; desc++) {
 651                         if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
 652                                 return desc;
 653                 }
 654         }
 655
 656         return NULL;
 657 }
 658
 659 static struct ifmedia_description *get_mode_desc(int ifmw,
 660     struct ifmedia_type_to_subtype *ttos)
 661 {
 662         int i;
 663         struct ifmedia_description *desc;
 664
 665         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 666                 if (ttos->modes[i].alias)
 667                         continue;
 668                 for (desc = ttos->modes[i].desc;
 669                     desc->ifmt_string != NULL; desc++) {
 670                         if (IFM_MODE(ifmw) == desc->ifmt_word)
 671                                 return desc;
 672                 }
 673         }
 674
 675         return NULL;
 676 }
 677
 678 static void
 679 print_media_word(int ifmw, int print_toptype)
 680 {
 681         struct ifmedia_description *desc;
 682         struct ifmedia_type_to_subtype *ttos;
 683         int seen_option = 0, i;
 684
 685         /* Find the top-level interface type. */
 686         desc = get_toptype_desc(ifmw);
 687         ttos = get_toptype_ttos(ifmw);
 688         if (desc->ifmt_string == NULL) {
 689                 printf("<unknown type>");
 690                 return;
 691         } else if (print_toptype) {
 692                 printf("%s", desc->ifmt_string);
 693         }
 694
 695         /*
 696          * Don't print the top-level type; it's not like we can
 697          * change it, or anything.
 698          */
 699
 700         /* Find subtype. */
 701         desc = get_subtype_desc(ifmw, ttos);
 702         if (desc != NULL)
 703                 goto got_subtype;
 704
 705         /* Falling to here means unknown subtype. */
 706         printf("<unknown subtype>");
 707         return;
 708
 709  got_subtype:
 710         if (print_toptype)
 711                 putchar(' ');
 712
 713         printf("%s", desc->ifmt_string);
 714
 715         if (print_toptype) {
 716                 desc = get_mode_desc(ifmw, ttos);
 717                 if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
 718                         printf(" mode %s", desc->ifmt_string);
 719         }
 720
 721         /* Find options. */
 722         for (i = 0; ttos->options[i].desc != NULL; i++) {
 723                 if (ttos->options[i].alias)
 724                         continue;
 725                 for (desc = ttos->options[i].desc;
 726                     desc->ifmt_string != NULL; desc++) {
 727                         if (ifmw & desc->ifmt_word) {
 728                                 if (seen_option == 0)
 729                                         printf(" <");
 730                                 printf("%s%s", seen_option++ ? "," : "",
 731                                     desc->ifmt_string);
 732                         }
 733                 }
 734         }
 735         printf("%s", seen_option ? ">" : "");
 736 }
 737
 738 static void
 739 print_media_word_ifconfig(int ifmw)
 740 {
 741         struct ifmedia_description *desc;
 742         struct ifmedia_type_to_subtype *ttos;
 743         int i;
 744
 745         /* Find the top-level interface type. */
 746         desc = get_toptype_desc(ifmw);
 747         ttos = get_toptype_ttos(ifmw);
 748         if (desc->ifmt_string == NULL) {
 749                 printf("<unknown type>");
 750                 return;
 751         }
 752
 753         /*
 754          * Don't print the top-level type; it's not like we can
 755          * change it, or anything.
 756          */
 757
 758         /* Find subtype. */
 759         desc = get_subtype_desc(ifmw, ttos);
 760         if (desc != NULL)
 761                 goto got_subtype;
 762
 763         /* Falling to here means unknown subtype. */
 764         printf("<unknown subtype>");
 765         return;
 766
 767  got_subtype:
 768         printf("media %s", desc->ifmt_string);
 769
 770         desc = get_mode_desc(ifmw, ttos);
 771         if (desc != NULL)
 772                 printf(" mode %s", desc->ifmt_string);
 773
 774         /* Find options. */
 775         for (i = 0; ttos->options[i].desc != NULL; i++) {
 776                 if (ttos->options[i].alias)
 777                         continue;
 778                 for (desc = ttos->options[i].desc;
 779                     desc->ifmt_string != NULL; desc++) {
 780                         if (ifmw & desc->ifmt_word) {
 781                                 printf(" mediaopt %s", desc->ifmt_string);
 782                         }
 783                 }
 784         }
 785 }
 786
 787 /**********************************************************************
 788  * ...until here.
 789  **********************************************************************/
 790
 791 static struct cmd media_cmds[] = {
 792         DEF_CMD_ARG("media",    setmedia),
 793         DEF_CMD_ARG("mode",     setmediamode),
 794         DEF_CMD_ARG("mediaopt", setmediaopt),
 795         DEF_CMD_ARG("-mediaopt",unsetmediaopt),
 796 };
 797 static struct afswtch af_media = {
 798         .af_name        = "af_media",
 799         .af_af          = AF_UNSPEC,
 800         .af_other_status = media_status,
 801 };
 802
 803 static __constructor void
 804 ifmedia_ctor(void)
 805 {
 806 #define N(a)    (sizeof(a) / sizeof(a[0]))
 807         int i;
 808
 809         for (i = 0; i < N(media_cmds);  i++)
 810                 cmd_register(&media_cmds[i]);
 811         af_register(&af_media);
 812 #undef N
 813 }