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 1.6.2.3 2001/11/14 04:35:07 yar Exp $ */
   3 /* $DragonFly: src/sbin/ifconfig/ifmedia.c,v 1.8 2005/03/06 05:01:59 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 #ifndef IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS
  94   #define IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS {                       \
  95         { IFM_AUTO, "autoselect" },                                     \
  96         { IFM_IEEE80211_11A, "11a" },                                   \
  97         { IFM_IEEE80211_11B, "11b" },                                   \
  98         { IFM_IEEE80211_11G, "11g" },                                   \
  99         { IFM_IEEE80211_FH, "fh" },                                     \
 100         { 0, NULL },                                                    \
 101 }
 102 #endif
 103
 104 #ifndef IFM_SUBTYPE_IEEE80211_MODE_ALIASES
 105   #define IFM_SUBTYPE_IEEE80211_MODE_ALIASES {                            \
 106         { IFM_AUTO, "auto" },                                           \
 107         { 0, NULL },                                                    \
 108 }
 109 #endif
 110
 111 static void     domediaopt(const char *, int, int);
 112 static int      get_media_subtype(int, const char *);
 113 static int      get_media_mode(int, const char *);
 114 static int      get_media_options(int, const char *);
 115 static int      lookup_media_word(struct ifmedia_description *, const char *);
 116 static void     print_media_word(int, int);
 117 static void     print_media_word_ifconfig(int);
 118
 119 static struct ifmedia_description *get_toptype_desc(int);
 120 static struct ifmedia_type_to_subtype *get_toptype_ttos(int);
 121 static struct ifmedia_description *get_subtype_desc(int,
 122     struct ifmedia_type_to_subtype *ttos);
 123
 124 void
 125 media_status(int s, struct rt_addrinfo *info __unused)
 126 {
 127         struct ifmediareq ifmr;
 128         int *media_list, i;
 129
 130         (void) memset(&ifmr, 0, sizeof(ifmr));
 131         (void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 132
 133         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
 134                 /*
 135                  * Interface doesn't support SIOC{G,S}IFMEDIA.
 136                  */
 137                 return;
 138         }
 139
 140         if (ifmr.ifm_count == 0) {
 141                 warnx("%s: no media types?", name);
 142                 return;
 143         }
 144
 145         media_list = (int *)malloc(ifmr.ifm_count * sizeof(int));
 146         if (media_list == NULL)
 147                 err(1, "malloc");
 148         ifmr.ifm_ulist = media_list;
 149
 150         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
 151                 err(1, "SIOCGIFMEDIA");
 152
 153         printf("\tmedia: ");
 154         print_media_word(ifmr.ifm_current, 1);
 155         if (ifmr.ifm_active != ifmr.ifm_current) {
 156                 putchar(' ');
 157                 putchar('(');
 158                 print_media_word(ifmr.ifm_active, 0);
 159                 putchar(')');
 160         }
 161
 162         putchar('\n');
 163
 164         if (ifmr.ifm_status & IFM_AVALID) {
 165                 printf("\tstatus: ");
 166                 switch (IFM_TYPE(ifmr.ifm_active)) {
 167                 case IFM_ETHER:
 168                         if (ifmr.ifm_status & IFM_ACTIVE)
 169                                 printf("active");
 170                         else
 171                                 printf("no carrier");
 172                         break;
 173
 174                 case IFM_FDDI:
 175                 case IFM_TOKEN:
 176                         if (ifmr.ifm_status & IFM_ACTIVE)
 177                                 printf("inserted");
 178                         else
 179                                 printf("no ring");
 180                         break;
 181
 182 #if notyet
 183                 case IFM_ATM:
 184                         if (ifmr.ifm_status & IFM_ACTIVE)
 185                                 printf("active");
 186                         else
 187                                 printf("no carrier");
 188                         break;
 189 #endif
 190
 191                 case IFM_IEEE80211:
 192                         /* XXX: Different value for adhoc? */
 193                         if (ifmr.ifm_status & IFM_ACTIVE)
 194                                 printf("associated");
 195                         else
 196                                 printf("no carrier");
 197                         break;
 198                 }
 199                 putchar('\n');
 200         }
 201
 202         if (ifmr.ifm_count > 0 && supmedia) {
 203                 printf("\tsupported media:\n");
 204                 for (i = 0; i < ifmr.ifm_count; i++) {
 205                         printf("\t\t");
 206                         print_media_word_ifconfig(media_list[i]);
 207                         putchar('\n');
 208                 }
 209         }
 210
 211         free(media_list);
 212 }
 213
 214 void
 215 setmedia(const char *val, int d __unused, int s,
 216          const struct afswtch *afp __unused)
 217 {
 218         struct ifmediareq ifmr;
 219         int first_type, subtype;
 220
 221         (void) memset(&ifmr, 0, sizeof(ifmr));
 222         (void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 223
 224         ifmr.ifm_count = 1;
 225         ifmr.ifm_ulist = &first_type;
 226         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
 227                 /*
 228                  * If we get E2BIG, the kernel is telling us
 229                  * that there are more, so we can ignore it.
 230                  */
 231                 if (errno != E2BIG)
 232                         err(1, "SIOCGIFMEDIA");
 233         }
 234
 235         if (ifmr.ifm_count == 0)
 236                 errx(1, "%s: no media types?", name);
 237
 238         /*
 239          * We are primarily concerned with the top-level type.
 240          * However, "current" may be only IFM_NONE, so we just look
 241          * for the top-level type in the first "supported type"
 242          * entry.
 243          *
 244          * (I'm assuming that all supported media types for a given
 245          * interface will be the same top-level type..)
 246          */
 247         subtype = get_media_subtype(IFM_TYPE(first_type), val);
 248
 249         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 250         ifr.ifr_media = (ifmr.ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
 251             IFM_TYPE(first_type) | subtype;
 252
 253         if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
 254                 err(1, "SIOCSIFMEDIA (media)");
 255 }
 256
 257 void
 258 setmediaopt(const char *val, int d __unused, int s,
 259             const struct afswtch *afp __unused)
 260 {
 261
 262         domediaopt(val, 0, s);
 263 }
 264
 265 void
 266 unsetmediaopt(const char *val, int d __unused, int s,
 267               const struct afswtch *afp __unused)
 268 {
 269
 270         domediaopt(val, 1, s);
 271 }
 272
 273 static void
 274 domediaopt(const char *val, int clear, int s)
 275 {
 276         struct ifmediareq ifmr;
 277         int *mwords, options;
 278
 279         (void) memset(&ifmr, 0, sizeof(ifmr));
 280         (void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 281
 282         /*
 283          * We must go through the motions of reading all
 284          * supported media because we need to know both
 285          * the current media type and the top-level type.
 286          */
 287
 288         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
 289                 err(1, "SIOCGIFMEDIA");
 290
 291         if (ifmr.ifm_count == 0)
 292                 errx(1, "%s: no media types?", name);
 293
 294         mwords = (int *)malloc(ifmr.ifm_count * sizeof(int));
 295         if (mwords == NULL)
 296                 err(1, "malloc");
 297
 298         ifmr.ifm_ulist = mwords;
 299         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
 300                 err(1, "SIOCGIFMEDIA");
 301
 302         options = get_media_options(IFM_TYPE(mwords[0]), val);
 303
 304         free(mwords);
 305
 306         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 307         ifr.ifr_media = ifmr.ifm_current;
 308         if (clear)
 309                 ifr.ifr_media &= ~options;
 310         else
 311                 ifr.ifr_media |= options;
 312
 313         if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
 314                 err(1, "SIOCSIFMEDIA (mediaopt)");
 315 }
 316
 317
 318 void
 319 setmediamode(const char *val, int d __unused, int s,
 320         const struct afswtch *afp __unused)
 321 {
 322         struct ifmediareq ifmr;
 323         int *mwords, mode;
 324
 325         (void) memset(&ifmr, 0, sizeof(ifmr));
 326         (void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 327
 328         /*
 329          * We must go through the motions of reading all
 330          * supported media because we need to know both
 331          * the current media type and the top-level type.
 332          */
 333
 334         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
 335                 err(1, "SIOCGIFMEDIA");
 336
 337         if (ifmr.ifm_count == 0)
 338                 errx(1, "%s: no media types?", name);
 339
 340         mwords = (int *)malloc(ifmr.ifm_count * sizeof(int));
 341         if (mwords == NULL)
 342                 err(1, "malloc");
 343
 344         ifmr.ifm_ulist = mwords;
 345         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
 346                 err(1, "SIOCGIFMEDIA");
 347
 348         mode = get_media_mode(IFM_TYPE(mwords[0]), val);
 349
 350         free(mwords);
 351
 352         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 353         ifr.ifr_media = (ifmr.ifm_current & ~IFM_MMASK) | mode;
 354
 355         if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
 356                 err(1, "SIOCSIFMEDIA (mode)");
 357 }
 358
 359 /**********************************************************************
 360  * A good chunk of this is duplicated from sys/net/ifmedia.c
 361  **********************************************************************/
 362
 363 static struct ifmedia_description ifm_type_descriptions[] =
 364     IFM_TYPE_DESCRIPTIONS;
 365
 366 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
 367     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
 368
 369 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
 370     IFM_SUBTYPE_ETHERNET_ALIASES;
 371
 372 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
 373     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
 374
 375 static struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
 376     IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
 377
 378 static struct ifmedia_description ifm_subtype_tokenring_aliases[] =
 379     IFM_SUBTYPE_TOKENRING_ALIASES;
 380
 381 static struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
 382     IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
 383
 384 static struct ifmedia_description ifm_subtype_fddi_descriptions[] =
 385     IFM_SUBTYPE_FDDI_DESCRIPTIONS;
 386
 387 static struct ifmedia_description ifm_subtype_fddi_aliases[] =
 388     IFM_SUBTYPE_FDDI_ALIASES;
 389
 390 static struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
 391     IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
 392
 393 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
 394     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
 395
 396 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
 397     IFM_SUBTYPE_IEEE80211_ALIASES;
 398
 399 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
 400     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
 401
 402 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
 403     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
 404
 405 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
 406     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
 407
 408 #if notyet
 409 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
 410     IFM_SUBTYPE_ATM_DESCRIPTIONS;
 411
 412 static struct ifmedia_description ifm_subtype_atm_aliases[] =
 413     IFM_SUBTYPE_ATM_ALIASES;
 414
 415 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
 416     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
 417 #endif
 418
 419 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
 420     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
 421
 422 static struct ifmedia_description ifm_subtype_shared_aliases[] =
 423     IFM_SUBTYPE_SHARED_ALIASES;
 424
 425 static struct ifmedia_description ifm_shared_option_descriptions[] =
 426     IFM_SHARED_OPTION_DESCRIPTIONS;
 427
 428 struct ifmedia_type_to_subtype {
 429         struct {
 430                 struct ifmedia_description *desc;
 431                 int alias;
 432         } subtypes[5];
 433         struct {
 434                 struct ifmedia_description *desc;
 435                 int alias;
 436         } options[3];
 437         struct {
 438                 struct ifmedia_description *desc;
 439                 int alias;
 440         } modes[3];
 441 };
 442
 443 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
 444 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
 445         {
 446                 {
 447                         { &ifm_subtype_shared_descriptions[0], 0 },
 448                         { &ifm_subtype_shared_aliases[0], 1 },
 449                         { &ifm_subtype_ethernet_descriptions[0], 0 },
 450                         { &ifm_subtype_ethernet_aliases[0], 1 },
 451                         { NULL, 0 },
 452                 },
 453                 {
 454                         { &ifm_shared_option_descriptions[0], 0 },
 455                         { &ifm_subtype_ethernet_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_tokenring_descriptions[0], 0 },
 467                         { &ifm_subtype_tokenring_aliases[0], 1 },
 468                         { NULL, 0 },
 469                 },
 470                 {
 471                         { &ifm_shared_option_descriptions[0], 0 },
 472                         { &ifm_subtype_tokenring_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_fddi_descriptions[0], 0 },
 484                         { &ifm_subtype_fddi_aliases[0], 1 },
 485                         { NULL, 0 },
 486                 },
 487                 {
 488                         { &ifm_shared_option_descriptions[0], 0 },
 489                         { &ifm_subtype_fddi_option_descriptions[0], 0 },
 490                         { NULL, 0 },
 491                 },
 492                 {
 493                         { NULL, 0 },
 494                 },
 495         },
 496         {
 497                 {
 498                         { &ifm_subtype_shared_descriptions[0], 0 },
 499                         { &ifm_subtype_shared_aliases[0], 1 },
 500                         { &ifm_subtype_ieee80211_descriptions[0], 0 },
 501                         { &ifm_subtype_ieee80211_aliases[0], 1 },
 502                         { NULL, 0 },
 503                 },
 504                 {
 505                         { &ifm_shared_option_descriptions[0], 0 },
 506                         { &ifm_subtype_ieee80211_option_descriptions[0], 0 },
 507                         { NULL, 0 },
 508                 },
 509                 {
 510                         { &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
 511                         { &ifm_subtype_ieee80211_mode_aliases[0], 0 },
 512                         { NULL, 0 },
 513                 },
 514         },
 515         {
 516                 {
 517                         { &ifm_subtype_shared_descriptions[0], 0 },
 518                         { &ifm_subtype_shared_aliases[0], 1 },
 519 #if notyet
 520                         { &ifm_subtype_atm_descriptions[0], 0 },
 521                         { &ifm_subtype_atm_aliases[0], 1 },
 522 #endif
 523                         { NULL, 0 },
 524                 },
 525                 {
 526                         { &ifm_shared_option_descriptions[0], 0 },
 527 #if notyet
 528                         { &ifm_subtype_atm_option_descriptions[0], 0 },
 529 #endif
 530                         { NULL, 0 },
 531                 },
 532                 {
 533                         { NULL, 0 },
 534                 },
 535         },
 536 };
 537
 538 static int
 539 get_media_subtype(int type, const char *val)
 540 {
 541         struct ifmedia_description *desc;
 542         struct ifmedia_type_to_subtype *ttos;
 543         int rval, i;
 544
 545         /* Find the top-level interface type. */
 546         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 547             desc->ifmt_string != NULL; desc++, ttos++)
 548                 if (type == desc->ifmt_word)
 549                         break;
 550         if (desc->ifmt_string == NULL)
 551                 errx(1, "unknown media type 0x%x", type);
 552
 553         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 554                 rval = lookup_media_word(ttos->subtypes[i].desc, val);
 555                 if (rval != -1)
 556                         return (rval);
 557         }
 558         errx(1, "unknown media subtype: %s", val);
 559         /*NOTREACHED*/
 560 }
 561
 562 static int
 563 get_media_mode(int type, const char *val)
 564 {
 565         struct ifmedia_description *desc;
 566         struct ifmedia_type_to_subtype *ttos;
 567         int rval, i;
 568
 569         /* Find the top-level interface type. */
 570         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 571             desc->ifmt_string != NULL; desc++, ttos++)
 572                 if (type == desc->ifmt_word)
 573                         break;
 574         if (desc->ifmt_string == NULL)
 575                 errx(1, "unknown media mode 0x%x", type);
 576
 577         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 578                 rval = lookup_media_word(ttos->modes[i].desc, val);
 579                 if (rval != -1)
 580                         return (rval);
 581         }
 582         return -1;
 583 }
 584
 585 static int
 586 get_media_options(int type, const char *val)
 587 {
 588         struct ifmedia_description *desc;
 589         struct ifmedia_type_to_subtype *ttos;
 590         char *optlist, *optptr;
 591         int option = 0, i, rval = 0;
 592
 593         /* We muck with the string, so copy it. */
 594         optlist = strdup(val);
 595         if (optlist == NULL)
 596                 err(1, "strdup");
 597
 598         /* Find the top-level interface type. */
 599         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 600             desc->ifmt_string != NULL; desc++, ttos++)
 601                 if (type == desc->ifmt_word)
 602                         break;
 603         if (desc->ifmt_string == NULL)
 604                 errx(1, "unknown media type 0x%x", type);
 605
 606         /*
 607          * Look up the options in the user-provided comma-separated
 608          * list.
 609          */
 610         optptr = optlist;
 611         for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
 612                 for (i = 0; ttos->options[i].desc != NULL; i++) {
 613                         option = lookup_media_word(ttos->options[i].desc, optptr);
 614                         if (option != -1)
 615                                 break;
 616                 }
 617                 if (option == 0)
 618                         errx(1, "unknown option: %s", optptr);
 619                 rval |= option;
 620         }
 621
 622         free(optlist);
 623         return (rval);
 624 }
 625
 626 static int
 627 lookup_media_word(struct ifmedia_description *desc, const char *val)
 628 {
 629
 630         for (; desc->ifmt_string != NULL; desc++)
 631                 if (strcasecmp(desc->ifmt_string, val) == 0)
 632                         return (desc->ifmt_word);
 633
 634         return (-1);
 635 }
 636
 637 static struct ifmedia_description *get_toptype_desc(int ifmw)
 638 {
 639         struct ifmedia_description *desc;
 640
 641         for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
 642                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 643                         break;
 644
 645         return desc;
 646 }
 647
 648 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
 649 {
 650         struct ifmedia_description *desc;
 651         struct ifmedia_type_to_subtype *ttos;
 652
 653         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 654             desc->ifmt_string != NULL; desc++, ttos++)
 655                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 656                         break;
 657
 658         return ttos;
 659 }
 660
 661 static struct ifmedia_description *get_subtype_desc(int ifmw,
 662     struct ifmedia_type_to_subtype *ttos)
 663 {
 664         int i;
 665         struct ifmedia_description *desc;
 666
 667         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 668                 if (ttos->subtypes[i].alias)
 669                         continue;
 670                 for (desc = ttos->subtypes[i].desc;
 671                     desc->ifmt_string != NULL; desc++) {
 672                         if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
 673                                 return desc;
 674                 }
 675         }
 676
 677         return NULL;
 678 }
 679
 680 static struct ifmedia_description *get_mode_desc(int ifmw,
 681     struct ifmedia_type_to_subtype *ttos)
 682 {
 683         int i;
 684         struct ifmedia_description *desc;
 685
 686         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 687                 if (ttos->modes[i].alias)
 688                         continue;
 689                 for (desc = ttos->modes[i].desc;
 690                     desc->ifmt_string != NULL; desc++) {
 691                         if (IFM_MODE(ifmw) == desc->ifmt_word)
 692                                 return desc;
 693                 }
 694         }
 695
 696         return NULL;
 697 }
 698
 699 static void
 700 print_media_word(int ifmw, int print_toptype)
 701 {
 702         struct ifmedia_description *desc;
 703         struct ifmedia_type_to_subtype *ttos;
 704         int seen_option = 0, i;
 705
 706         /* Find the top-level interface type. */
 707         desc = get_toptype_desc(ifmw);
 708         ttos = get_toptype_ttos(ifmw);
 709         if (desc->ifmt_string == NULL) {
 710                 printf("<unknown type>");
 711                 return;
 712         } else if (print_toptype) {
 713                 printf("%s", desc->ifmt_string);
 714         }
 715
 716         /*
 717          * Don't print the top-level type; it's not like we can
 718          * change it, or anything.
 719          */
 720
 721         /* Find subtype. */
 722         desc = get_subtype_desc(ifmw, ttos);
 723         if (desc != NULL)
 724                 goto got_subtype;
 725
 726         /* Falling to here means unknown subtype. */
 727         printf("<unknown subtype>");
 728         return;
 729
 730  got_subtype:
 731         if (print_toptype)
 732                 putchar(' ');
 733
 734         printf("%s", desc->ifmt_string);
 735
 736         if (print_toptype) {
 737                 desc = get_mode_desc(ifmw, ttos);
 738                 if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
 739                         printf(" mode %s", desc->ifmt_string);
 740         }
 741
 742         /* Find options. */
 743         for (i = 0; ttos->options[i].desc != NULL; i++) {
 744                 if (ttos->options[i].alias)
 745                         continue;
 746                 for (desc = ttos->options[i].desc;
 747                     desc->ifmt_string != NULL; desc++) {
 748                         if (ifmw & desc->ifmt_word) {
 749                                 if (seen_option == 0)
 750                                         printf(" <");
 751                                 printf("%s%s", seen_option++ ? "," : "",
 752                                     desc->ifmt_string);
 753                         }
 754                 }
 755         }
 756         printf("%s", seen_option ? ">" : "");
 757 }
 758
 759 static void
 760 print_media_word_ifconfig(int ifmw)
 761 {
 762         struct ifmedia_description *desc;
 763         struct ifmedia_type_to_subtype *ttos;
 764         int i;
 765
 766         /* Find the top-level interface type. */
 767         desc = get_toptype_desc(ifmw);
 768         ttos = get_toptype_ttos(ifmw);
 769         if (desc->ifmt_string == NULL) {
 770                 printf("<unknown type>");
 771                 return;
 772         }
 773
 774         /*
 775          * Don't print the top-level type; it's not like we can
 776          * change it, or anything.
 777          */
 778
 779         /* Find subtype. */
 780         desc = get_subtype_desc(ifmw, ttos);
 781         if (desc != NULL)
 782                 goto got_subtype;
 783
 784         /* Falling to here means unknown subtype. */
 785         printf("<unknown subtype>");
 786         return;
 787
 788  got_subtype:
 789         printf("media %s", desc->ifmt_string);
 790
 791         desc = get_mode_desc(ifmw, ttos);
 792         if (desc != NULL)
 793                 printf(" mode %s", desc->ifmt_string);
 794
 795         /* Find options. */
 796         for (i = 0; ttos->options[i].desc != NULL; i++) {
 797                 if (ttos->options[i].alias)
 798                         continue;
 799                 for (desc = ttos->options[i].desc;
 800                     desc->ifmt_string != NULL; desc++) {
 801                         if (ifmw & desc->ifmt_word) {
 802                                 printf(" mediaopt %s", desc->ifmt_string);
 803                         }
 804                 }
 805         }
 806 }
 807
 808 /**********************************************************************
 809  * ...until here.
 810  **********************************************************************/