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
   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. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  */
  64
  65 #include <sys/param.h>
  66 #include <sys/ioctl.h>
  67 #include <sys/socket.h>
  68 #include <sys/sysctl.h>
  69 #include <sys/time.h>
  70
  71 #include <net/if.h>
  72 #include <net/if_dl.h>
  73 #include <net/if_types.h>
  74 #include <net/if_media.h>
  75 #include <net/route.h>
  76
  77 #include <ctype.h>
  78 #include <err.h>
  79 #include <errno.h>
  80 #include <fcntl.h>
  81 #include <stdio.h>
  82 #include <stdlib.h>
  83 #include <string.h>
  84 #include <unistd.h>
  85
  86 #include "ifconfig.h"
  87
  88 static void     domediaopt(const char *, int, int);
  89 static int      get_media_subtype(int, const char *);
  90 static int      get_media_mode(int, const char *);
  91 static int      get_media_options(int, const char *);
  92 static int      lookup_media_word(struct ifmedia_description *, const char *);
  93 static void     print_media_word(int, int);
  94 static void     print_media_word_ifconfig(int);
  95
  96 static struct ifmedia_description *get_toptype_desc(int);
  97 static struct ifmedia_type_to_subtype *get_toptype_ttos(int);
  98 static struct ifmedia_description *get_subtype_desc(int,
  99     struct ifmedia_type_to_subtype *ttos);
 100
 101 static void
 102 media_status(int s)
 103 {
 104         struct ifmediareq ifmr;
 105         int *media_list, i;
 106
 107         memset(&ifmr, 0, sizeof(ifmr));
 108         strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 109
 110         if (ioctl(s, SIOCGIFMEDIA, &ifmr) < 0) {
 111                 /*
 112                  * Interface doesn't support SIOC{G,S}IFMEDIA.
 113                  */
 114                 return;
 115         }
 116
 117         if (ifmr.ifm_count == 0) {
 118                 warnx("%s: no media types?", name);
 119                 return;
 120         }
 121
 122         media_list = malloc(ifmr.ifm_count * sizeof(int));
 123         if (media_list == NULL)
 124                 err(1, "malloc");
 125         ifmr.ifm_ulist = media_list;
 126
 127         if (ioctl(s, SIOCGIFMEDIA, &ifmr) < 0)
 128                 err(1, "SIOCGIFMEDIA");
 129
 130         printf("\tmedia: ");
 131         print_media_word(ifmr.ifm_current, 1);
 132         if (ifmr.ifm_active != ifmr.ifm_current) {
 133                 putchar(' ');
 134                 putchar('(');
 135                 print_media_word(ifmr.ifm_active, 0);
 136                 putchar(')');
 137         }
 138
 139         putchar('\n');
 140
 141         if (ifmr.ifm_status & IFM_AVALID) {
 142                 printf("\tstatus: ");
 143                 switch (IFM_TYPE(ifmr.ifm_active)) {
 144                 case IFM_ETHER:
 145                         if (ifmr.ifm_status & IFM_ACTIVE)
 146                                 printf("active");
 147                         else
 148                                 printf("no carrier");
 149                         break;
 150
 151                 case IFM_ATM:
 152                         if (ifmr.ifm_status & IFM_ACTIVE)
 153                                 printf("active");
 154                         else
 155                                 printf("no carrier");
 156                         break;
 157
 158                 case IFM_IEEE80211:
 159                         /* XXX: Different value for adhoc? */
 160                         if (ifmr.ifm_status & IFM_ACTIVE)
 161                                 printf("associated");
 162                         else
 163                                 printf("no carrier");
 164                         break;
 165                 case IFM_CARP:
 166                         if (ifmr.ifm_status & IFM_ACTIVE)
 167                                 printf("master");
 168                         else
 169                                 printf("backup");
 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
 253         ifmr = ifmedia_getstate(s);
 254
 255         /*
 256          * We are primarily concerned with the top-level type.
 257          * However, "current" may be only IFM_NONE, so we just look
 258          * for the top-level type in the first "supported type"
 259          * entry.
 260          *
 261          * (I'm assuming that all supported media types for a given
 262          * interface will be the same top-level type..)
 263          */
 264         subtype = get_media_subtype(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 265
 266         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 267         ifr.ifr_media = (ifmr->ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
 268             IFM_TYPE(ifmr->ifm_ulist[0]) | subtype;
 269
 270         if ((ifr.ifr_media & IFM_TMASK) == 0) {
 271                 ifr.ifr_media &= ~IFM_GMASK;
 272         }
 273
 274         ifmr->ifm_current = ifr.ifr_media;
 275         callback_register(setifmediacallback, (void *)ifmr);
 276 }
 277
 278 static void
 279 setmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 280 {
 281
 282         domediaopt(val, 0, s);
 283 }
 284
 285 static void
 286 unsetmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 287 {
 288
 289         domediaopt(val, 1, s);
 290 }
 291
 292 static void
 293 domediaopt(const char *val, int clear, int s)
 294 {
 295         struct ifmediareq *ifmr;
 296         int options;
 297
 298         ifmr = ifmedia_getstate(s);
 299
 300         options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 301
 302         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 303         ifr.ifr_media = ifmr->ifm_current;
 304         if (clear)
 305                 ifr.ifr_media &= ~options;
 306         else
 307                 ifr.ifr_media |= options;
 308
 309         ifmr->ifm_current = ifr.ifr_media;
 310         callback_register(setifmediacallback, (void *)ifmr);
 311 }
 312
 313
 314 static void
 315 setmediamode(const char *val, int d, int s, const struct afswtch *afp)
 316 {
 317         struct ifmediareq *ifmr;
 318         int mode;
 319
 320         ifmr = ifmedia_getstate(s);
 321
 322         mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 323
 324         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 325         ifr.ifr_media = (ifmr->ifm_current & ~IFM_MMASK) | mode;
 326
 327         ifmr->ifm_current = ifr.ifr_media;
 328         callback_register(setifmediacallback, (void *)ifmr);
 329 }
 330
 331 /**********************************************************************
 332  * A good chunk of this is duplicated from sys/net/ifmedia.c
 333  **********************************************************************/
 334
 335 static struct ifmedia_description ifm_type_descriptions[] =
 336     IFM_TYPE_DESCRIPTIONS;
 337
 338 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
 339     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
 340
 341 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
 342     IFM_SUBTYPE_ETHERNET_ALIASES;
 343
 344 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
 345     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
 346
 347 static struct ifmedia_description ifm_subtype_ethernet_option_alias[] =
 348     IFM_SUBTYPE_ETHERNET_OPTION_ALIAS;
 349
 350 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
 351     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
 352
 353 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
 354     IFM_SUBTYPE_IEEE80211_ALIASES;
 355
 356 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
 357     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
 358
 359 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
 360     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
 361
 362 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
 363     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
 364
 365 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
 366     IFM_SUBTYPE_ATM_DESCRIPTIONS;
 367
 368 static struct ifmedia_description ifm_subtype_atm_aliases[] =
 369     IFM_SUBTYPE_ATM_ALIASES;
 370
 371 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
 372     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
 373
 374 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
 375     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
 376
 377 static struct ifmedia_description ifm_subtype_shared_aliases[] =
 378     IFM_SUBTYPE_SHARED_ALIASES;
 379
 380 static struct ifmedia_description ifm_shared_option_descriptions[] =
 381     IFM_SHARED_OPTION_DESCRIPTIONS;
 382
 383 struct ifmedia_type_to_subtype {
 384         struct {
 385                 struct ifmedia_description *desc;
 386                 int alias;
 387         } subtypes[5];
 388         struct {
 389                 struct ifmedia_description *desc;
 390                 int alias;
 391         } options[4];
 392         struct {
 393                 struct ifmedia_description *desc;
 394                 int alias;
 395         } modes[3];
 396 };
 397
 398 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
 399 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
 400         {
 401                 {
 402                         { &ifm_subtype_shared_descriptions[0], 0 },
 403                         { &ifm_subtype_shared_aliases[0], 1 },
 404                         { &ifm_subtype_ethernet_descriptions[0], 0 },
 405                         { &ifm_subtype_ethernet_aliases[0], 1 },
 406                         { NULL, 0 },
 407                 },
 408                 {
 409                         { &ifm_shared_option_descriptions[0], 0 },
 410                         { &ifm_subtype_ethernet_option_descriptions[0], 0 },
 411                         { &ifm_subtype_ethernet_option_alias[0], 1 },
 412                         { NULL, 0 },
 413                 },
 414                 {
 415                         { NULL, 0 },
 416                 },
 417         },
 418         {
 419                 {
 420                         { &ifm_subtype_shared_descriptions[0], 0 },
 421                         { &ifm_subtype_shared_aliases[0], 1 },
 422                         { &ifm_subtype_ieee80211_descriptions[0], 0 },
 423                         { &ifm_subtype_ieee80211_aliases[0], 1 },
 424                         { NULL, 0 },
 425                 },
 426                 {
 427                         { &ifm_shared_option_descriptions[0], 0 },
 428                         { &ifm_subtype_ieee80211_option_descriptions[0], 0 },
 429                         { NULL, 0 },
 430                 },
 431                 {
 432                         { &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
 433                         { &ifm_subtype_ieee80211_mode_aliases[0], 0 },
 434                         { NULL, 0 },
 435                 },
 436         },
 437         {
 438                 {
 439                         { &ifm_subtype_shared_descriptions[0], 0 },
 440                         { &ifm_subtype_shared_aliases[0], 1 },
 441                         { &ifm_subtype_atm_descriptions[0], 0 },
 442                         { &ifm_subtype_atm_aliases[0], 1 },
 443                         { NULL, 0 },
 444                 },
 445                 {
 446                         { &ifm_shared_option_descriptions[0], 0 },
 447                         { &ifm_subtype_atm_option_descriptions[0], 0 },
 448                         { NULL, 0 },
 449                 },
 450                 {
 451                         { NULL, 0 },
 452                 },
 453         },
 454 };
 455
 456 static int
 457 get_media_subtype(int type, const char *val)
 458 {
 459         struct ifmedia_description *desc;
 460         struct ifmedia_type_to_subtype *ttos;
 461         int rval, i;
 462
 463         /* Find the top-level interface type. */
 464         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 465             desc->ifmt_string != NULL; desc++, ttos++)
 466                 if (type == desc->ifmt_word)
 467                         break;
 468         if (desc->ifmt_string == NULL)
 469                 errx(1, "unknown media type 0x%x", type);
 470
 471         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 472                 rval = lookup_media_word(ttos->subtypes[i].desc, val);
 473                 if (rval != -1)
 474                         return (rval);
 475         }
 476         errx(1, "unknown media subtype: %s", val);
 477         /*NOTREACHED*/
 478 }
 479
 480 static int
 481 get_media_mode(int type, const char *val)
 482 {
 483         struct ifmedia_description *desc;
 484         struct ifmedia_type_to_subtype *ttos;
 485         int rval, i;
 486
 487         /* Find the top-level interface type. */
 488         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 489             desc->ifmt_string != NULL; desc++, ttos++)
 490                 if (type == desc->ifmt_word)
 491                         break;
 492         if (desc->ifmt_string == NULL)
 493                 errx(1, "unknown media mode 0x%x", type);
 494
 495         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 496                 rval = lookup_media_word(ttos->modes[i].desc, val);
 497                 if (rval != -1)
 498                         return (rval);
 499         }
 500         return -1;
 501 }
 502
 503 static int
 504 get_media_options(int type, const char *val)
 505 {
 506         struct ifmedia_description *desc;
 507         struct ifmedia_type_to_subtype *ttos;
 508         char *optlist, *optptr;
 509         int option = 0, i, rval = 0;
 510
 511         /* We muck with the string, so copy it. */
 512         optlist = strdup(val);
 513         if (optlist == NULL)
 514                 err(1, "strdup");
 515
 516         /* Find the top-level interface type. */
 517         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 518             desc->ifmt_string != NULL; desc++, ttos++)
 519                 if (type == desc->ifmt_word)
 520                         break;
 521         if (desc->ifmt_string == NULL)
 522                 errx(1, "unknown media type 0x%x", type);
 523
 524         /*
 525          * Look up the options in the user-provided comma-separated
 526          * list.
 527          */
 528         optptr = optlist;
 529         for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
 530                 for (i = 0; ttos->options[i].desc != NULL; i++) {
 531                         option = lookup_media_word(ttos->options[i].desc, optptr);
 532                         if (option != -1)
 533                                 break;
 534                 }
 535                 if (option == 0)
 536                         errx(1, "unknown option: %s", optptr);
 537                 rval |= option;
 538         }
 539
 540         free(optlist);
 541         return (rval);
 542 }
 543
 544 static int
 545 lookup_media_word(struct ifmedia_description *desc, const char *val)
 546 {
 547
 548         for (; desc->ifmt_string != NULL; desc++)
 549                 if (strcasecmp(desc->ifmt_string, val) == 0)
 550                         return (desc->ifmt_word);
 551
 552         return (-1);
 553 }
 554
 555 static struct ifmedia_description *get_toptype_desc(int ifmw)
 556 {
 557         struct ifmedia_description *desc;
 558
 559         for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
 560                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 561                         break;
 562
 563         return desc;
 564 }
 565
 566 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
 567 {
 568         struct ifmedia_description *desc;
 569         struct ifmedia_type_to_subtype *ttos;
 570
 571         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 572             desc->ifmt_string != NULL; desc++, ttos++)
 573                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 574                         break;
 575
 576         return ttos;
 577 }
 578
 579 static struct ifmedia_description *get_subtype_desc(int ifmw,
 580     struct ifmedia_type_to_subtype *ttos)
 581 {
 582         int i;
 583         struct ifmedia_description *desc;
 584
 585         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 586                 if (ttos->subtypes[i].alias)
 587                         continue;
 588                 for (desc = ttos->subtypes[i].desc;
 589                     desc->ifmt_string != NULL; desc++) {
 590                         if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
 591                                 return desc;
 592                 }
 593         }
 594
 595         return NULL;
 596 }
 597
 598 static struct ifmedia_description *get_mode_desc(int ifmw,
 599     struct ifmedia_type_to_subtype *ttos)
 600 {
 601         int i;
 602         struct ifmedia_description *desc;
 603
 604         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 605                 if (ttos->modes[i].alias)
 606                         continue;
 607                 for (desc = ttos->modes[i].desc;
 608                     desc->ifmt_string != NULL; desc++) {
 609                         if (IFM_MODE(ifmw) == desc->ifmt_word)
 610                                 return desc;
 611                 }
 612         }
 613
 614         return NULL;
 615 }
 616
 617 static void
 618 print_media_word(int ifmw, int print_toptype)
 619 {
 620         struct ifmedia_description *desc;
 621         struct ifmedia_type_to_subtype *ttos;
 622         int seen_option = 0, i;
 623
 624         /* Find the top-level interface type. */
 625         desc = get_toptype_desc(ifmw);
 626         ttos = get_toptype_ttos(ifmw);
 627         if (desc->ifmt_string == NULL) {
 628                 printf("<unknown type>");
 629                 return;
 630         } else if (print_toptype) {
 631                 printf("%s", desc->ifmt_string);
 632         }
 633
 634         /*
 635          * Don't print the top-level type; it's not like we can
 636          * change it, or anything.
 637          */
 638
 639         /* Find subtype. */
 640         desc = get_subtype_desc(ifmw, ttos);
 641         if (desc != NULL)
 642                 goto got_subtype;
 643
 644         /* Falling to here means unknown subtype. */
 645         printf("<unknown subtype>");
 646         return;
 647
 648  got_subtype:
 649         if (print_toptype)
 650                 putchar(' ');
 651
 652         printf("%s", desc->ifmt_string);
 653
 654         if (print_toptype) {
 655                 desc = get_mode_desc(ifmw, ttos);
 656                 if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
 657                         printf(" mode %s", desc->ifmt_string);
 658         }
 659
 660         /* Find options. */
 661         for (i = 0; ttos->options[i].desc != NULL; i++) {
 662                 if (ttos->options[i].alias)
 663                         continue;
 664                 for (desc = ttos->options[i].desc;
 665                     desc->ifmt_string != NULL; desc++) {
 666                         if (ifmw & desc->ifmt_word) {
 667                                 if (seen_option == 0)
 668                                         printf(" <");
 669                                 printf("%s%s", seen_option++ ? "," : "",
 670                                     desc->ifmt_string);
 671                         }
 672                 }
 673         }
 674         printf("%s", seen_option ? ">" : "");
 675 }
 676
 677 static void
 678 print_media_word_ifconfig(int ifmw)
 679 {
 680         struct ifmedia_description *desc;
 681         struct ifmedia_type_to_subtype *ttos;
 682         int i;
 683
 684         /* Find the top-level interface type. */
 685         desc = get_toptype_desc(ifmw);
 686         ttos = get_toptype_ttos(ifmw);
 687         if (desc->ifmt_string == NULL) {
 688                 printf("<unknown type>");
 689                 return;
 690         }
 691
 692         /*
 693          * Don't print the top-level type; it's not like we can
 694          * change it, or anything.
 695          */
 696
 697         /* Find subtype. */
 698         desc = get_subtype_desc(ifmw, ttos);
 699         if (desc != NULL)
 700                 goto got_subtype;
 701
 702         /* Falling to here means unknown subtype. */
 703         printf("<unknown subtype>");
 704         return;
 705
 706  got_subtype:
 707         printf("media %s", desc->ifmt_string);
 708
 709         desc = get_mode_desc(ifmw, ttos);
 710         if (desc != NULL)
 711                 printf(" mode %s", desc->ifmt_string);
 712
 713         /* Find options. */
 714         for (i = 0; ttos->options[i].desc != NULL; i++) {
 715                 if (ttos->options[i].alias)
 716                         continue;
 717                 for (desc = ttos->options[i].desc;
 718                     desc->ifmt_string != NULL; desc++) {
 719                         if (ifmw & desc->ifmt_word) {
 720                                 printf(" mediaopt %s", desc->ifmt_string);
 721                         }
 722                 }
 723         }
 724 }
 725
 726 /**********************************************************************
 727  * ...until here.
 728  **********************************************************************/
 729
 730 static struct cmd media_cmds[] = {
 731         DEF_CMD_ARG("media",    setmedia),
 732         DEF_CMD_ARG("mode",     setmediamode),
 733         DEF_CMD_ARG("mediaopt", setmediaopt),
 734         DEF_CMD_ARG("-mediaopt",unsetmediaopt),
 735 };
 736 static struct afswtch af_media = {
 737         .af_name        = "af_media",
 738         .af_af          = AF_UNSPEC,
 739         .af_other_status = media_status,
 740 };
 741
 742 static __constructor(101) void
 743 ifmedia_ctor(void)
 744 {
 745 #define N(a)    (sizeof(a) / sizeof(a[0]))
 746         int i;
 747
 748         for (i = 0; i < N(media_cmds);  i++)
 749                 cmd_register(&media_cmds[i]);
 750         af_register(&af_media);
 751 #undef N
 752 }