sbin/ifconfig/ifmedia.c

   1 /*      $NetBSD: ifconfig.c,v 1.34 1997/04/21 01:17:58 lukem Exp $      */
   2 /* $FreeBSD$ */
   3
   4 /*
   5  * Copyright (c) 1997 Jason R. Thorpe.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed for the NetBSD Project
  19  *      by Jason R. Thorpe.
  20  * 4. The name of the author may not be used to endorse or promote products
  21  *    derived from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 /*
  37  * Copyright (c) 1983, 1993
  38  *      The Regents of the University of California.  All rights reserved.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  * 1. Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  * 2. Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in the
  47  *    documentation and/or other materials provided with the distribution.
  48  * 3. All advertising materials mentioning features or use of this software
  49  *    must display the following acknowledgement:
  50  *      This product includes software developed by the University of
  51  *      California, Berkeley and its contributors.
  52  * 4. Neither the name of the University nor the names of its contributors
  53  *    may be used to endorse or promote products derived from this software
  54  *    without specific prior written permission.
  55  *
  56  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  57  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  58  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  59  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  60  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  61  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  62  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  63  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  64  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  65  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  66  * SUCH DAMAGE.
  67  */
  68
  69 #include <sys/param.h>
  70 #include <sys/ioctl.h>
  71 #include <sys/socket.h>
  72 #include <sys/sysctl.h>
  73 #include <sys/time.h>
  74
  75 #include <net/if.h>
  76 #include <net/if_dl.h>
  77 #include <net/if_types.h>
  78 #include <net/if_media.h>
  79 #include <net/route.h>
  80
  81 #include <ctype.h>
  82 #include <err.h>
  83 #include <errno.h>
  84 #include <fcntl.h>
  85 #include <stdio.h>
  86 #include <stdlib.h>
  87 #include <string.h>
  88 #include <unistd.h>
  89
  90 #include "ifconfig.h"
  91
  92 static void     domediaopt(const char *, int, int);
  93 static int      get_media_subtype(int, const char *);
  94 static int      get_media_mode(int, const char *);
  95 static int      get_media_options(int, const char *);
  96 static int      lookup_media_word(struct ifmedia_description *, const char *);
  97 static void     print_media_word(int, int);
  98 static void     print_media_word_ifconfig(int);
  99
 100 static struct ifmedia_description *get_toptype_desc(int);
 101 static struct ifmedia_type_to_subtype *get_toptype_ttos(int);
 102 static struct ifmedia_description *get_subtype_desc(int,
 103     struct ifmedia_type_to_subtype *ttos);
 104
 105 static void
 106 media_status(int s)
 107 {
 108         struct ifmediareq ifmr;
 109         int *media_list, i;
 110
 111         (void) memset(&ifmr, 0, sizeof(ifmr));
 112         (void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 113
 114         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
 115                 /*
 116                  * Interface doesn't support SIOC{G,S}IFMEDIA.
 117                  */
 118                 return;
 119         }
 120
 121         if (ifmr.ifm_count == 0) {
 122                 warnx("%s: no media types?", name);
 123                 return;
 124         }
 125
 126         media_list = (int *)malloc(ifmr.ifm_count * sizeof(int));
 127         if (media_list == NULL)
 128                 err(1, "malloc");
 129         ifmr.ifm_ulist = media_list;
 130
 131         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
 132                 err(1, "SIOCGIFMEDIA");
 133
 134         printf("\tmedia: ");
 135         print_media_word(ifmr.ifm_current, 1);
 136         if (ifmr.ifm_active != ifmr.ifm_current) {
 137                 putchar(' ');
 138                 putchar('(');
 139                 print_media_word(ifmr.ifm_active, 0);
 140                 putchar(')');
 141         }
 142
 143         putchar('\n');
 144
 145         if (ifmr.ifm_status & IFM_AVALID) {
 146                 printf("\tstatus: ");
 147                 switch (IFM_TYPE(ifmr.ifm_active)) {
 148                 case IFM_ETHER:
 149                 case IFM_ATM:
 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_IEEE80211:
 165                         /* XXX: Different value for adhoc? */
 166                         if (ifmr.ifm_status & IFM_ACTIVE)
 167                                 printf("associated");
 168                         else
 169                                 printf("no carrier");
 170                         break;
 171                 }
 172                 putchar('\n');
 173         }
 174
 175         if (ifmr.ifm_count > 0 && supmedia) {
 176                 printf("\tsupported media:\n");
 177                 for (i = 0; i < ifmr.ifm_count; i++) {
 178                         printf("\t\t");
 179                         print_media_word_ifconfig(media_list[i]);
 180                         putchar('\n');
 181                 }
 182         }
 183
 184         free(media_list);
 185 }
 186
 187 struct ifmediareq *
 188 ifmedia_getstate(int s)
 189 {
 190         static struct ifmediareq *ifmr = NULL;
 191         int *mwords;
 192
 193         if (ifmr == NULL) {
 194                 ifmr = (struct ifmediareq *)malloc(sizeof(struct ifmediareq));
 195                 if (ifmr == NULL)
 196                         err(1, "malloc");
 197
 198                 (void) memset(ifmr, 0, sizeof(struct ifmediareq));
 199                 (void) strncpy(ifmr->ifm_name, name,
 200                     sizeof(ifmr->ifm_name));
 201
 202                 ifmr->ifm_count = 0;
 203                 ifmr->ifm_ulist = NULL;
 204
 205                 /*
 206                  * We must go through the motions of reading all
 207                  * supported media because we need to know both
 208                  * the current media type and the top-level type.
 209                  */
 210
 211                 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0) {
 212                         err(1, "SIOCGIFMEDIA");
 213                 }
 214
 215                 if (ifmr->ifm_count == 0)
 216                         errx(1, "%s: no media types?", name);
 217
 218                 mwords = (int *)malloc(ifmr->ifm_count * sizeof(int));
 219                 if (mwords == NULL)
 220                         err(1, "malloc");
 221
 222                 ifmr->ifm_ulist = mwords;
 223                 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0)
 224                         err(1, "SIOCGIFMEDIA");
 225         }
 226
 227         return ifmr;
 228 }
 229
 230 static void
 231 setifmediacallback(int s, void *arg)
 232 {
 233         struct ifmediareq *ifmr = (struct ifmediareq *)arg;
 234         static int did_it = 0;
 235
 236         if (!did_it) {
 237                 ifr.ifr_media = ifmr->ifm_current;
 238                 if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
 239                         err(1, "SIOCSIFMEDIA (media)");
 240                 free(ifmr->ifm_ulist);
 241                 free(ifmr);
 242                 did_it = 1;
 243         }
 244 }
 245
 246 static void
 247 setmedia(const char *val, int d, int s, const struct afswtch *afp)
 248 {
 249         struct ifmediareq *ifmr;
 250         int subtype;
 251
 252         ifmr = ifmedia_getstate(s);
 253
 254         /*
 255          * We are primarily concerned with the top-level type.
 256          * However, "current" may be only IFM_NONE, so we just look
 257          * for the top-level type in the first "supported type"
 258          * entry.
 259          *
 260          * (I'm assuming that all supported media types for a given
 261          * interface will be the same top-level type..)
 262          */
 263         subtype = get_media_subtype(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 264
 265         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 266         ifr.ifr_media = (ifmr->ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
 267             IFM_TYPE(ifmr->ifm_ulist[0]) | subtype;
 268
 269         if ((ifr.ifr_media & IFM_TMASK) == 0) {
 270                 ifr.ifr_media &= ~IFM_GMASK;
 271         }
 272
 273         ifmr->ifm_current = ifr.ifr_media;
 274         callback_register(setifmediacallback, (void *)ifmr);
 275 }
 276
 277 static void
 278 setmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 279 {
 280
 281         domediaopt(val, 0, s);
 282 }
 283
 284 static void
 285 unsetmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 286 {
 287
 288         domediaopt(val, 1, s);
 289 }
 290
 291 static void
 292 domediaopt(const char *val, int clear, int s)
 293 {
 294         struct ifmediareq *ifmr;
 295         int options;
 296
 297         ifmr = ifmedia_getstate(s);
 298
 299         options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 300
 301         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 302         ifr.ifr_media = ifmr->ifm_current;
 303         if (clear)
 304                 ifr.ifr_media &= ~options;
 305         else {
 306                 if (options & IFM_HDX) {
 307                         ifr.ifr_media &= ~IFM_FDX;
 308                         options &= ~IFM_HDX;
 309                 }
 310                 ifr.ifr_media |= options;
 311         }
 312         ifmr->ifm_current = ifr.ifr_media;
 313         callback_register(setifmediacallback, (void *)ifmr);
 314 }
 315
 316 static void
 317 setmediainst(const char *val, int d, int s, const struct afswtch *afp)
 318 {
 319         struct ifmediareq *ifmr;
 320         int inst;
 321
 322         ifmr = ifmedia_getstate(s);
 323
 324         inst = atoi(val);
 325         if (inst < 0 || inst > IFM_INST_MAX)
 326                 errx(1, "invalid media instance: %s", val);
 327
 328         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 329         ifr.ifr_media = (ifmr->ifm_current & ~IFM_IMASK) | inst << IFM_ISHIFT;
 330
 331         ifmr->ifm_current = ifr.ifr_media;
 332         callback_register(setifmediacallback, (void *)ifmr);
 333 }
 334
 335 static void
 336 setmediamode(const char *val, int d, int s, const struct afswtch *afp)
 337 {
 338         struct ifmediareq *ifmr;
 339         int mode;
 340
 341         ifmr = ifmedia_getstate(s);
 342
 343         mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 344
 345         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 346         ifr.ifr_media = (ifmr->ifm_current & ~IFM_MMASK) | mode;
 347
 348         ifmr->ifm_current = ifr.ifr_media;
 349         callback_register(setifmediacallback, (void *)ifmr);
 350 }
 351
 352 /**********************************************************************
 353  * A good chunk of this is duplicated from sys/net/ifmedia.c
 354  **********************************************************************/
 355
 356 static struct ifmedia_description ifm_type_descriptions[] =
 357     IFM_TYPE_DESCRIPTIONS;
 358
 359 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
 360     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
 361
 362 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
 363     IFM_SUBTYPE_ETHERNET_ALIASES;
 364
 365 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
 366     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
 367
 368 static struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
 369     IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
 370
 371 static struct ifmedia_description ifm_subtype_tokenring_aliases[] =
 372     IFM_SUBTYPE_TOKENRING_ALIASES;
 373
 374 static struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
 375     IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
 376
 377 static struct ifmedia_description ifm_subtype_fddi_descriptions[] =
 378     IFM_SUBTYPE_FDDI_DESCRIPTIONS;
 379
 380 static struct ifmedia_description ifm_subtype_fddi_aliases[] =
 381     IFM_SUBTYPE_FDDI_ALIASES;
 382
 383 static struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
 384     IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
 385
 386 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
 387     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
 388
 389 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
 390     IFM_SUBTYPE_IEEE80211_ALIASES;
 391
 392 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
 393     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
 394
 395 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
 396     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
 397
 398 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
 399     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
 400
 401 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
 402     IFM_SUBTYPE_ATM_DESCRIPTIONS;
 403
 404 static struct ifmedia_description ifm_subtype_atm_aliases[] =
 405     IFM_SUBTYPE_ATM_ALIASES;
 406
 407 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
 408     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
 409
 410 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
 411     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
 412
 413 static struct ifmedia_description ifm_subtype_shared_aliases[] =
 414     IFM_SUBTYPE_SHARED_ALIASES;
 415
 416 static struct ifmedia_description ifm_shared_option_descriptions[] =
 417     IFM_SHARED_OPTION_DESCRIPTIONS;
 418
 419 struct ifmedia_type_to_subtype {
 420         struct {
 421                 struct ifmedia_description *desc;
 422                 int alias;
 423         } subtypes[5];
 424         struct {
 425                 struct ifmedia_description *desc;
 426                 int alias;
 427         } options[3];
 428         struct {
 429                 struct ifmedia_description *desc;
 430                 int alias;
 431         } modes[3];
 432 };
 433
 434 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
 435 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
 436         {
 437                 {
 438                         { &ifm_subtype_shared_descriptions[0], 0 },
 439                         { &ifm_subtype_shared_aliases[0], 1 },
 440                         { &ifm_subtype_ethernet_descriptions[0], 0 },
 441                         { &ifm_subtype_ethernet_aliases[0], 1 },
 442                         { NULL, 0 },
 443                 },
 444                 {
 445                         { &ifm_shared_option_descriptions[0], 0 },
 446                         { &ifm_subtype_ethernet_option_descriptions[0], 0 },
 447                         { NULL, 0 },
 448                 },
 449                 {
 450                         { NULL, 0 },
 451                 },
 452         },
 453         {
 454                 {
 455                         { &ifm_subtype_shared_descriptions[0], 0 },
 456                         { &ifm_subtype_shared_aliases[0], 1 },
 457                         { &ifm_subtype_tokenring_descriptions[0], 0 },
 458                         { &ifm_subtype_tokenring_aliases[0], 1 },
 459                         { NULL, 0 },
 460                 },
 461                 {
 462                         { &ifm_shared_option_descriptions[0], 0 },
 463                         { &ifm_subtype_tokenring_option_descriptions[0], 0 },
 464                         { NULL, 0 },
 465                 },
 466                 {
 467                         { NULL, 0 },
 468                 },
 469         },
 470         {
 471                 {
 472                         { &ifm_subtype_shared_descriptions[0], 0 },
 473                         { &ifm_subtype_shared_aliases[0], 1 },
 474                         { &ifm_subtype_fddi_descriptions[0], 0 },
 475                         { &ifm_subtype_fddi_aliases[0], 1 },
 476                         { NULL, 0 },
 477                 },
 478                 {
 479                         { &ifm_shared_option_descriptions[0], 0 },
 480                         { &ifm_subtype_fddi_option_descriptions[0], 0 },
 481                         { NULL, 0 },
 482                 },
 483                 {
 484                         { NULL, 0 },
 485                 },
 486         },
 487         {
 488                 {
 489                         { &ifm_subtype_shared_descriptions[0], 0 },
 490                         { &ifm_subtype_shared_aliases[0], 1 },
 491                         { &ifm_subtype_ieee80211_descriptions[0], 0 },
 492                         { &ifm_subtype_ieee80211_aliases[0], 1 },
 493                         { NULL, 0 },
 494                 },
 495                 {
 496                         { &ifm_shared_option_descriptions[0], 0 },
 497                         { &ifm_subtype_ieee80211_option_descriptions[0], 0 },
 498                         { NULL, 0 },
 499                 },
 500                 {
 501                         { &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
 502                         { &ifm_subtype_ieee80211_mode_aliases[0], 0 },
 503                         { NULL, 0 },
 504                 },
 505         },
 506         {
 507                 {
 508                         { &ifm_subtype_shared_descriptions[0], 0 },
 509                         { &ifm_subtype_shared_aliases[0], 1 },
 510                         { &ifm_subtype_atm_descriptions[0], 0 },
 511                         { &ifm_subtype_atm_aliases[0], 1 },
 512                         { NULL, 0 },
 513                 },
 514                 {
 515                         { &ifm_shared_option_descriptions[0], 0 },
 516                         { &ifm_subtype_atm_option_descriptions[0], 0 },
 517                         { NULL, 0 },
 518                 },
 519                 {
 520                         { NULL, 0 },
 521                 },
 522         },
 523 };
 524
 525 static int
 526 get_media_subtype(int type, const char *val)
 527 {
 528         struct ifmedia_description *desc;
 529         struct ifmedia_type_to_subtype *ttos;
 530         int rval, i;
 531
 532         /* Find the top-level interface type. */
 533         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 534             desc->ifmt_string != NULL; desc++, ttos++)
 535                 if (type == desc->ifmt_word)
 536                         break;
 537         if (desc->ifmt_string == NULL)
 538                 errx(1, "unknown media type 0x%x", type);
 539
 540         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 541                 rval = lookup_media_word(ttos->subtypes[i].desc, val);
 542                 if (rval != -1)
 543                         return (rval);
 544         }
 545         errx(1, "unknown media subtype: %s", val);
 546         /*NOTREACHED*/
 547 }
 548
 549 static int
 550 get_media_mode(int type, const char *val)
 551 {
 552         struct ifmedia_description *desc;
 553         struct ifmedia_type_to_subtype *ttos;
 554         int rval, i;
 555
 556         /* Find the top-level interface type. */
 557         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 558             desc->ifmt_string != NULL; desc++, ttos++)
 559                 if (type == desc->ifmt_word)
 560                         break;
 561         if (desc->ifmt_string == NULL)
 562                 errx(1, "unknown media mode 0x%x", type);
 563
 564         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 565                 rval = lookup_media_word(ttos->modes[i].desc, val);
 566                 if (rval != -1)
 567                         return (rval);
 568         }
 569         return -1;
 570 }
 571
 572 static int
 573 get_media_options(int type, const char *val)
 574 {
 575         struct ifmedia_description *desc;
 576         struct ifmedia_type_to_subtype *ttos;
 577         char *optlist, *optptr;
 578         int option = 0, i, rval = 0;
 579
 580         /* We muck with the string, so copy it. */
 581         optlist = strdup(val);
 582         if (optlist == NULL)
 583                 err(1, "strdup");
 584
 585         /* Find the top-level interface type. */
 586         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 587             desc->ifmt_string != NULL; desc++, ttos++)
 588                 if (type == desc->ifmt_word)
 589                         break;
 590         if (desc->ifmt_string == NULL)
 591                 errx(1, "unknown media type 0x%x", type);
 592
 593         /*
 594          * Look up the options in the user-provided comma-separated
 595          * list.
 596          */
 597         optptr = optlist;
 598         for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
 599                 for (i = 0; ttos->options[i].desc != NULL; i++) {
 600                         option = lookup_media_word(ttos->options[i].desc, optptr);
 601                         if (option != -1)
 602                                 break;
 603                 }
 604                 if (option == 0)
 605                         errx(1, "unknown option: %s", optptr);
 606                 rval |= option;
 607         }
 608
 609         free(optlist);
 610         return (rval);
 611 }
 612
 613 static int
 614 lookup_media_word(struct ifmedia_description *desc, const char *val)
 615 {
 616
 617         for (; desc->ifmt_string != NULL; desc++)
 618                 if (strcasecmp(desc->ifmt_string, val) == 0)
 619                         return (desc->ifmt_word);
 620
 621         return (-1);
 622 }
 623
 624 static struct ifmedia_description *get_toptype_desc(int ifmw)
 625 {
 626         struct ifmedia_description *desc;
 627
 628         for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
 629                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 630                         break;
 631
 632         return desc;
 633 }
 634
 635 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
 636 {
 637         struct ifmedia_description *desc;
 638         struct ifmedia_type_to_subtype *ttos;
 639
 640         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 641             desc->ifmt_string != NULL; desc++, ttos++)
 642                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 643                         break;
 644
 645         return ttos;
 646 }
 647
 648 static struct ifmedia_description *get_subtype_desc(int ifmw,
 649     struct ifmedia_type_to_subtype *ttos)
 650 {
 651         int i;
 652         struct ifmedia_description *desc;
 653
 654         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 655                 if (ttos->subtypes[i].alias)
 656                         continue;
 657                 for (desc = ttos->subtypes[i].desc;
 658                     desc->ifmt_string != NULL; desc++) {
 659                         if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
 660                                 return desc;
 661                 }
 662         }
 663
 664         return NULL;
 665 }
 666
 667 static struct ifmedia_description *get_mode_desc(int ifmw,
 668     struct ifmedia_type_to_subtype *ttos)
 669 {
 670         int i;
 671         struct ifmedia_description *desc;
 672
 673         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 674                 if (ttos->modes[i].alias)
 675                         continue;
 676                 for (desc = ttos->modes[i].desc;
 677                     desc->ifmt_string != NULL; desc++) {
 678                         if (IFM_MODE(ifmw) == desc->ifmt_word)
 679                                 return desc;
 680                 }
 681         }
 682
 683         return NULL;
 684 }
 685
 686 static void
 687 print_media_word(int ifmw, int print_toptype)
 688 {
 689         struct ifmedia_description *desc;
 690         struct ifmedia_type_to_subtype *ttos;
 691         int seen_option = 0, i;
 692
 693         /* Find the top-level interface type. */
 694         desc = get_toptype_desc(ifmw);
 695         ttos = get_toptype_ttos(ifmw);
 696         if (desc->ifmt_string == NULL) {
 697                 printf("<unknown type>");
 698                 return;
 699         } else if (print_toptype) {
 700                 printf("%s", desc->ifmt_string);
 701         }
 702
 703         /*
 704          * Don't print the top-level type; it's not like we can
 705          * change it, or anything.
 706          */
 707
 708         /* Find subtype. */
 709         desc = get_subtype_desc(ifmw, ttos);
 710         if (desc == NULL) {
 711                 printf("<unknown subtype>");
 712                 return;
 713         }
 714
 715         if (print_toptype)
 716                 putchar(' ');
 717
 718         printf("%s", desc->ifmt_string);
 719
 720         if (print_toptype) {
 721                 desc = get_mode_desc(ifmw, ttos);
 722                 if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
 723                         printf(" mode %s", desc->ifmt_string);
 724         }
 725
 726         /* Find options. */
 727         for (i = 0; ttos->options[i].desc != NULL; i++) {
 728                 if (ttos->options[i].alias)
 729                         continue;
 730                 for (desc = ttos->options[i].desc;
 731                     desc->ifmt_string != NULL; desc++) {
 732                         if (ifmw & desc->ifmt_word) {
 733                                 if (seen_option == 0)
 734                                         printf(" <");
 735                                 printf("%s%s", seen_option++ ? "," : "",
 736                                     desc->ifmt_string);
 737                         }
 738                 }
 739         }
 740         printf("%s", seen_option ? ">" : "");
 741
 742         if (print_toptype && IFM_INST(ifmw) != 0)
 743                 printf(" instance %d", IFM_INST(ifmw));
 744 }
 745
 746 static void
 747 print_media_word_ifconfig(int ifmw)
 748 {
 749         struct ifmedia_description *desc;
 750         struct ifmedia_type_to_subtype *ttos;
 751         int i;
 752
 753         /* Find the top-level interface type. */
 754         desc = get_toptype_desc(ifmw);
 755         ttos = get_toptype_ttos(ifmw);
 756         if (desc->ifmt_string == NULL) {
 757                 printf("<unknown type>");
 758                 return;
 759         }
 760
 761         /*
 762          * Don't print the top-level type; it's not like we can
 763          * change it, or anything.
 764          */
 765
 766         /* Find subtype. */
 767         desc = get_subtype_desc(ifmw, ttos);
 768         if (desc == NULL) {
 769                 printf("<unknown subtype>");
 770                 return;
 771         }
 772
 773         printf("media %s", desc->ifmt_string);
 774
 775         desc = get_mode_desc(ifmw, ttos);
 776         if (desc != NULL)
 777                 printf(" mode %s", desc->ifmt_string);
 778
 779         /* Find options. */
 780         for (i = 0; ttos->options[i].desc != NULL; i++) {
 781                 if (ttos->options[i].alias)
 782                         continue;
 783                 for (desc = ttos->options[i].desc;
 784                     desc->ifmt_string != NULL; desc++) {
 785                         if (ifmw & desc->ifmt_word) {
 786                                 printf(" mediaopt %s", desc->ifmt_string);
 787                         }
 788                 }
 789         }
 790
 791         if (IFM_INST(ifmw) != 0)
 792                 printf(" instance %d", IFM_INST(ifmw));
 793 }
 794
 795 /**********************************************************************
 796  * ...until here.
 797  **********************************************************************/
 798
 799 static struct cmd media_cmds[] = {
 800         DEF_CMD_ARG("media",    setmedia),
 801         DEF_CMD_ARG("mode",     setmediamode),
 802         DEF_CMD_ARG("mediaopt", setmediaopt),
 803         DEF_CMD_ARG("-mediaopt",unsetmediaopt),
 804         DEF_CMD_ARG("inst",     setmediainst),
 805         DEF_CMD_ARG("instance", setmediainst),
 806 };
 807 static struct afswtch af_media = {
 808         .af_name        = "af_media",
 809         .af_af          = AF_UNSPEC,
 810         .af_other_status = media_status,
 811 };
 812
 813 static __constructor void
 814 ifmedia_ctor(void)
 815 {
 816 #define N(a)    (sizeof(a) / sizeof(a[0]))
 817         int i;
 818
 819         for (i = 0; i < N(media_cmds);  i++)
 820                 cmd_register(&media_cmds[i]);
 821         af_register(&af_media);
 822 #undef N
 823 }