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 1.13 2007/08/27 16:15:41 hasso 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_ATM:
 157                         if (ifmr.ifm_status & IFM_ACTIVE)
 158                                 printf("active");
 159                         else
 160                                 printf("no carrier");
 161                         break;
 162
 163                 case IFM_IEEE80211:
 164                         /* XXX: Different value for adhoc? */
 165                         if (ifmr.ifm_status & IFM_ACTIVE)
 166                                 printf("associated");
 167                         else
 168                                 printf("no carrier");
 169                         break;
 170                 case IFM_CARP:
 171                         if (ifmr.ifm_status & IFM_ACTIVE)
 172                                 printf("master");
 173                         else
 174                                 printf("backup");
 175                         break;
 176                 }
 177                 putchar('\n');
 178         }
 179
 180         if (ifmr.ifm_count > 0 && supmedia) {
 181                 printf("\tsupported media:\n");
 182                 for (i = 0; i < ifmr.ifm_count; i++) {
 183                         printf("\t\t");
 184                         print_media_word_ifconfig(media_list[i]);
 185                         putchar('\n');
 186                 }
 187         }
 188
 189         free(media_list);
 190 }
 191
 192 struct ifmediareq *
 193 ifmedia_getstate(int s)
 194 {
 195         static struct ifmediareq *ifmr = NULL;
 196         int *mwords;
 197
 198         if (ifmr == NULL) {
 199                 ifmr = (struct ifmediareq *)malloc(sizeof(struct ifmediareq));
 200                 if (ifmr == NULL)
 201                         err(1, "malloc");
 202
 203                 (void) memset(ifmr, 0, sizeof(struct ifmediareq));
 204                 (void) strncpy(ifmr->ifm_name, name,
 205                     sizeof(ifmr->ifm_name));
 206
 207                 ifmr->ifm_count = 0;
 208                 ifmr->ifm_ulist = NULL;
 209
 210                 /*
 211                  * We must go through the motions of reading all
 212                  * supported media because we need to know both
 213                  * the current media type and the top-level type.
 214                  */
 215
 216                 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0) {
 217                         err(1, "SIOCGIFMEDIA");
 218                 }
 219
 220                 if (ifmr->ifm_count == 0)
 221                         errx(1, "%s: no media types?", name);
 222
 223                 mwords = (int *)malloc(ifmr->ifm_count * sizeof(int));
 224                 if (mwords == NULL)
 225                         err(1, "malloc");
 226
 227                 ifmr->ifm_ulist = mwords;
 228                 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0)
 229                         err(1, "SIOCGIFMEDIA");
 230         }
 231
 232         return ifmr;
 233 }
 234
 235 static void
 236 setifmediacallback(int s, void *arg)
 237 {
 238         struct ifmediareq *ifmr = (struct ifmediareq *)arg;
 239         static int did_it = 0;
 240
 241         if (!did_it) {
 242                 ifr.ifr_media = ifmr->ifm_current;
 243                 if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
 244                         err(1, "SIOCSIFMEDIA (media)");
 245                 free(ifmr->ifm_ulist);
 246                 free(ifmr);
 247                 did_it = 1;
 248         }
 249 }
 250
 251 static void
 252 setmedia(const char *val, int d, int s, const struct afswtch *afp)
 253 {
 254         struct ifmediareq *ifmr;
 255         int subtype;
 256
 257
 258         ifmr = ifmedia_getstate(s);
 259
 260         /*
 261          * We are primarily concerned with the top-level type.
 262          * However, "current" may be only IFM_NONE, so we just look
 263          * for the top-level type in the first "supported type"
 264          * entry.
 265          *
 266          * (I'm assuming that all supported media types for a given
 267          * interface will be the same top-level type..)
 268          */
 269         subtype = get_media_subtype(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 270
 271         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 272         ifr.ifr_media = (ifmr->ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
 273             IFM_TYPE(ifmr->ifm_ulist[0]) | subtype;
 274
 275         if ((ifr.ifr_media & IFM_TMASK) == 0) {
 276                 ifr.ifr_media &= ~IFM_GMASK;
 277         }
 278
 279         ifmr->ifm_current = ifr.ifr_media;
 280         callback_register(setifmediacallback, (void *)ifmr);
 281 }
 282
 283 static void
 284 setmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 285 {
 286
 287         domediaopt(val, 0, s);
 288 }
 289
 290 static void
 291 unsetmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 292 {
 293
 294         domediaopt(val, 1, s);
 295 }
 296
 297 static void
 298 domediaopt(const char *val, int clear, int s)
 299 {
 300         struct ifmediareq *ifmr;
 301         int options;
 302
 303         ifmr = ifmedia_getstate(s);
 304
 305         options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 306
 307         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 308         ifr.ifr_media = ifmr->ifm_current;
 309         if (clear)
 310                 ifr.ifr_media &= ~options;
 311         else
 312                 ifr.ifr_media |= options;
 313
 314         ifmr->ifm_current = ifr.ifr_media;
 315         callback_register(setifmediacallback, (void *)ifmr);
 316 }
 317
 318
 319 static void
 320 setmediamode(const char *val, int d, int s, const struct afswtch *afp)
 321 {
 322         struct ifmediareq *ifmr;
 323         int mode;
 324
 325         ifmr = ifmedia_getstate(s);
 326
 327         mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 328
 329         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 330         ifr.ifr_media = (ifmr->ifm_current & ~IFM_MMASK) | mode;
 331
 332         ifmr->ifm_current = ifr.ifr_media;
 333         callback_register(setifmediacallback, (void *)ifmr);
 334 }
 335
 336 /**********************************************************************
 337  * A good chunk of this is duplicated from sys/net/ifmedia.c
 338  **********************************************************************/
 339
 340 static struct ifmedia_description ifm_type_descriptions[] =
 341     IFM_TYPE_DESCRIPTIONS;
 342
 343 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
 344     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
 345
 346 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
 347     IFM_SUBTYPE_ETHERNET_ALIASES;
 348
 349 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
 350     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
 351
 352 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
 353     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
 354
 355 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
 356     IFM_SUBTYPE_IEEE80211_ALIASES;
 357
 358 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
 359     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
 360
 361 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
 362     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
 363
 364 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
 365     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
 366
 367 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
 368     IFM_SUBTYPE_ATM_DESCRIPTIONS;
 369
 370 static struct ifmedia_description ifm_subtype_atm_aliases[] =
 371     IFM_SUBTYPE_ATM_ALIASES;
 372
 373 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
 374     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
 375
 376 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
 377     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
 378
 379 static struct ifmedia_description ifm_subtype_shared_aliases[] =
 380     IFM_SUBTYPE_SHARED_ALIASES;
 381
 382 static struct ifmedia_description ifm_shared_option_descriptions[] =
 383     IFM_SHARED_OPTION_DESCRIPTIONS;
 384
 385 struct ifmedia_type_to_subtype {
 386         struct {
 387                 struct ifmedia_description *desc;
 388                 int alias;
 389         } subtypes[5];
 390         struct {
 391                 struct ifmedia_description *desc;
 392                 int alias;
 393         } options[3];
 394         struct {
 395                 struct ifmedia_description *desc;
 396                 int alias;
 397         } modes[3];
 398 };
 399
 400 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
 401 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
 402         {
 403                 {
 404                         { &ifm_subtype_shared_descriptions[0], 0 },
 405                         { &ifm_subtype_shared_aliases[0], 1 },
 406                         { &ifm_subtype_ethernet_descriptions[0], 0 },
 407                         { &ifm_subtype_ethernet_aliases[0], 1 },
 408                         { NULL, 0 },
 409                 },
 410                 {
 411                         { &ifm_shared_option_descriptions[0], 0 },
 412                         { &ifm_subtype_ethernet_option_descriptions[0], 0 },
 413                         { NULL, 0 },
 414                 },
 415                 {
 416                         { NULL, 0 },
 417                 },
 418         },
 419         {
 420                 {
 421                         { &ifm_subtype_shared_descriptions[0], 0 },
 422                         { &ifm_subtype_shared_aliases[0], 1 },
 423                         { &ifm_subtype_ieee80211_descriptions[0], 0 },
 424                         { &ifm_subtype_ieee80211_aliases[0], 1 },
 425                         { NULL, 0 },
 426                 },
 427                 {
 428                         { &ifm_shared_option_descriptions[0], 0 },
 429                         { &ifm_subtype_ieee80211_option_descriptions[0], 0 },
 430                         { NULL, 0 },
 431                 },
 432                 {
 433                         { &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
 434                         { &ifm_subtype_ieee80211_mode_aliases[0], 0 },
 435                         { NULL, 0 },
 436                 },
 437         },
 438         {
 439                 {
 440                         { &ifm_subtype_shared_descriptions[0], 0 },
 441                         { &ifm_subtype_shared_aliases[0], 1 },
 442                         { &ifm_subtype_atm_descriptions[0], 0 },
 443                         { &ifm_subtype_atm_aliases[0], 1 },
 444                         { NULL, 0 },
 445                 },
 446                 {
 447                         { &ifm_shared_option_descriptions[0], 0 },
 448                         { &ifm_subtype_atm_option_descriptions[0], 0 },
 449                         { NULL, 0 },
 450                 },
 451                 {
 452                         { NULL, 0 },
 453                 },
 454         },
 455 };
 456
 457 static int
 458 get_media_subtype(int type, const char *val)
 459 {
 460         struct ifmedia_description *desc;
 461         struct ifmedia_type_to_subtype *ttos;
 462         int rval, i;
 463
 464         /* Find the top-level interface type. */
 465         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 466             desc->ifmt_string != NULL; desc++, ttos++)
 467                 if (type == desc->ifmt_word)
 468                         break;
 469         if (desc->ifmt_string == NULL)
 470                 errx(1, "unknown media type 0x%x", type);
 471
 472         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 473                 rval = lookup_media_word(ttos->subtypes[i].desc, val);
 474                 if (rval != -1)
 475                         return (rval);
 476         }
 477         errx(1, "unknown media subtype: %s", val);
 478         /*NOTREACHED*/
 479 }
 480
 481 static int
 482 get_media_mode(int type, const char *val)
 483 {
 484         struct ifmedia_description *desc;
 485         struct ifmedia_type_to_subtype *ttos;
 486         int rval, i;
 487
 488         /* Find the top-level interface type. */
 489         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 490             desc->ifmt_string != NULL; desc++, ttos++)
 491                 if (type == desc->ifmt_word)
 492                         break;
 493         if (desc->ifmt_string == NULL)
 494                 errx(1, "unknown media mode 0x%x", type);
 495
 496         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 497                 rval = lookup_media_word(ttos->modes[i].desc, val);
 498                 if (rval != -1)
 499                         return (rval);
 500         }
 501         return -1;
 502 }
 503
 504 static int
 505 get_media_options(int type, const char *val)
 506 {
 507         struct ifmedia_description *desc;
 508         struct ifmedia_type_to_subtype *ttos;
 509         char *optlist, *optptr;
 510         int option = 0, i, rval = 0;
 511
 512         /* We muck with the string, so copy it. */
 513         optlist = strdup(val);
 514         if (optlist == NULL)
 515                 err(1, "strdup");
 516
 517         /* Find the top-level interface type. */
 518         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 519             desc->ifmt_string != NULL; desc++, ttos++)
 520                 if (type == desc->ifmt_word)
 521                         break;
 522         if (desc->ifmt_string == NULL)
 523                 errx(1, "unknown media type 0x%x", type);
 524
 525         /*
 526          * Look up the options in the user-provided comma-separated
 527          * list.
 528          */
 529         optptr = optlist;
 530         for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
 531                 for (i = 0; ttos->options[i].desc != NULL; i++) {
 532                         option = lookup_media_word(ttos->options[i].desc, optptr);
 533                         if (option != -1)
 534                                 break;
 535                 }
 536                 if (option == 0)
 537                         errx(1, "unknown option: %s", optptr);
 538                 rval |= option;
 539         }
 540
 541         free(optlist);
 542         return (rval);
 543 }
 544
 545 static int
 546 lookup_media_word(struct ifmedia_description *desc, const char *val)
 547 {
 548
 549         for (; desc->ifmt_string != NULL; desc++)
 550                 if (strcasecmp(desc->ifmt_string, val) == 0)
 551                         return (desc->ifmt_word);
 552
 553         return (-1);
 554 }
 555
 556 static struct ifmedia_description *get_toptype_desc(int ifmw)
 557 {
 558         struct ifmedia_description *desc;
 559
 560         for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
 561                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 562                         break;
 563
 564         return desc;
 565 }
 566
 567 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
 568 {
 569         struct ifmedia_description *desc;
 570         struct ifmedia_type_to_subtype *ttos;
 571
 572         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 573             desc->ifmt_string != NULL; desc++, ttos++)
 574                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 575                         break;
 576
 577         return ttos;
 578 }
 579
 580 static struct ifmedia_description *get_subtype_desc(int ifmw,
 581     struct ifmedia_type_to_subtype *ttos)
 582 {
 583         int i;
 584         struct ifmedia_description *desc;
 585
 586         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 587                 if (ttos->subtypes[i].alias)
 588                         continue;
 589                 for (desc = ttos->subtypes[i].desc;
 590                     desc->ifmt_string != NULL; desc++) {
 591                         if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
 592                                 return desc;
 593                 }
 594         }
 595
 596         return NULL;
 597 }
 598
 599 static struct ifmedia_description *get_mode_desc(int ifmw,
 600     struct ifmedia_type_to_subtype *ttos)
 601 {
 602         int i;
 603         struct ifmedia_description *desc;
 604
 605         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 606                 if (ttos->modes[i].alias)
 607                         continue;
 608                 for (desc = ttos->modes[i].desc;
 609                     desc->ifmt_string != NULL; desc++) {
 610                         if (IFM_MODE(ifmw) == desc->ifmt_word)
 611                                 return desc;
 612                 }
 613         }
 614
 615         return NULL;
 616 }
 617
 618 static void
 619 print_media_word(int ifmw, int print_toptype)
 620 {
 621         struct ifmedia_description *desc;
 622         struct ifmedia_type_to_subtype *ttos;
 623         int seen_option = 0, i;
 624
 625         /* Find the top-level interface type. */
 626         desc = get_toptype_desc(ifmw);
 627         ttos = get_toptype_ttos(ifmw);
 628         if (desc->ifmt_string == NULL) {
 629                 printf("<unknown type>");
 630                 return;
 631         } else if (print_toptype) {
 632                 printf("%s", desc->ifmt_string);
 633         }
 634
 635         /*
 636          * Don't print the top-level type; it's not like we can
 637          * change it, or anything.
 638          */
 639
 640         /* Find subtype. */
 641         desc = get_subtype_desc(ifmw, ttos);
 642         if (desc != NULL)
 643                 goto got_subtype;
 644
 645         /* Falling to here means unknown subtype. */
 646         printf("<unknown subtype>");
 647         return;
 648
 649  got_subtype:
 650         if (print_toptype)
 651                 putchar(' ');
 652
 653         printf("%s", desc->ifmt_string);
 654
 655         if (print_toptype) {
 656                 desc = get_mode_desc(ifmw, ttos);
 657                 if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
 658                         printf(" mode %s", desc->ifmt_string);
 659         }
 660
 661         /* Find options. */
 662         for (i = 0; ttos->options[i].desc != NULL; i++) {
 663                 if (ttos->options[i].alias)
 664                         continue;
 665                 for (desc = ttos->options[i].desc;
 666                     desc->ifmt_string != NULL; desc++) {
 667                         if (ifmw & desc->ifmt_word) {
 668                                 if (seen_option == 0)
 669                                         printf(" <");
 670                                 printf("%s%s", seen_option++ ? "," : "",
 671                                     desc->ifmt_string);
 672                         }
 673                 }
 674         }
 675         printf("%s", seen_option ? ">" : "");
 676 }
 677
 678 static void
 679 print_media_word_ifconfig(int ifmw)
 680 {
 681         struct ifmedia_description *desc;
 682         struct ifmedia_type_to_subtype *ttos;
 683         int 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         }
 692
 693         /*
 694          * Don't print the top-level type; it's not like we can
 695          * change it, or anything.
 696          */
 697
 698         /* Find subtype. */
 699         desc = get_subtype_desc(ifmw, ttos);
 700         if (desc != NULL)
 701                 goto got_subtype;
 702
 703         /* Falling to here means unknown subtype. */
 704         printf("<unknown subtype>");
 705         return;
 706
 707  got_subtype:
 708         printf("media %s", desc->ifmt_string);
 709
 710         desc = get_mode_desc(ifmw, ttos);
 711         if (desc != NULL)
 712                 printf(" mode %s", desc->ifmt_string);
 713
 714         /* Find options. */
 715         for (i = 0; ttos->options[i].desc != NULL; i++) {
 716                 if (ttos->options[i].alias)
 717                         continue;
 718                 for (desc = ttos->options[i].desc;
 719                     desc->ifmt_string != NULL; desc++) {
 720                         if (ifmw & desc->ifmt_word) {
 721                                 printf(" mediaopt %s", desc->ifmt_string);
 722                         }
 723                 }
 724         }
 725 }
 726
 727 /**********************************************************************
 728  * ...until here.
 729  **********************************************************************/
 730
 731 static struct cmd media_cmds[] = {
 732         DEF_CMD_ARG("media",    setmedia),
 733         DEF_CMD_ARG("mode",     setmediamode),
 734         DEF_CMD_ARG("mediaopt", setmediaopt),
 735         DEF_CMD_ARG("-mediaopt",unsetmediaopt),
 736 };
 737 static struct afswtch af_media = {
 738         .af_name        = "af_media",
 739         .af_af          = AF_UNSPEC,
 740         .af_other_status = media_status,
 741 };
 742
 743 static __constructor void
 744 ifmedia_ctor(void)
 745 {
 746 #define N(a)    (sizeof(a) / sizeof(a[0]))
 747         int i;
 748
 749         for (i = 0; i < N(media_cmds);  i++)
 750                 cmd_register(&media_cmds[i]);
 751         af_register(&af_media);
 752 #undef N
 753 }