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 #define IFM_OPMODE(x) \
 106         ((x) & (IFM_IEEE80211_ADHOC | IFM_IEEE80211_HOSTAP | \
 107          IFM_IEEE80211_IBSS | IFM_IEEE80211_WDS | IFM_IEEE80211_MONITOR))
 108 #define IFM_IEEE80211_STA       0
 109
 110 static void
 111 media_status(int s)
 112 {
 113         struct ifmediareq ifmr;
 114         int *media_list, i;
 115
 116         (void) memset(&ifmr, 0, sizeof(ifmr));
 117         (void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 118
 119         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
 120                 /*
 121                  * Interface doesn't support SIOC{G,S}IFMEDIA.
 122                  */
 123                 return;
 124         }
 125
 126         if (ifmr.ifm_count == 0) {
 127                 warnx("%s: no media types?", name);
 128                 return;
 129         }
 130
 131         media_list = (int *)malloc(ifmr.ifm_count * sizeof(int));
 132         if (media_list == NULL)
 133                 err(1, "malloc");
 134         ifmr.ifm_ulist = media_list;
 135
 136         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
 137                 err(1, "SIOCGIFMEDIA");
 138
 139         printf("\tmedia: ");
 140         print_media_word(ifmr.ifm_current, 1);
 141         if (ifmr.ifm_active != ifmr.ifm_current) {
 142                 putchar(' ');
 143                 putchar('(');
 144                 print_media_word(ifmr.ifm_active, 0);
 145                 putchar(')');
 146         }
 147
 148         putchar('\n');
 149
 150         if (ifmr.ifm_status & IFM_AVALID) {
 151                 printf("\tstatus: ");
 152                 switch (IFM_TYPE(ifmr.ifm_active)) {
 153                 case IFM_ETHER:
 154                 case IFM_ATM:
 155                         if (ifmr.ifm_status & IFM_ACTIVE)
 156                                 printf("active");
 157                         else
 158                                 printf("no carrier");
 159                         break;
 160
 161                 case IFM_FDDI:
 162                 case IFM_TOKEN:
 163                         if (ifmr.ifm_status & IFM_ACTIVE)
 164                                 printf("inserted");
 165                         else
 166                                 printf("no ring");
 167                         break;
 168
 169                 case IFM_IEEE80211:
 170                         if (ifmr.ifm_status & IFM_ACTIVE) {
 171                                 /* NB: only sta mode associates */
 172                                 if (IFM_OPMODE(ifmr.ifm_active) == IFM_IEEE80211_STA)
 173                                         printf("associated");
 174                                 else
 175                                         printf("running");
 176                         } else
 177                                 printf("no carrier");
 178                         break;
 179                 }
 180                 putchar('\n');
 181         }
 182
 183         if (ifmr.ifm_count > 0 && supmedia) {
 184                 printf("\tsupported media:\n");
 185                 for (i = 0; i < ifmr.ifm_count; i++) {
 186                         printf("\t\t");
 187                         print_media_word_ifconfig(media_list[i]);
 188                         putchar('\n');
 189                 }
 190         }
 191
 192         free(media_list);
 193 }
 194
 195 struct ifmediareq *
 196 ifmedia_getstate(int s)
 197 {
 198         static struct ifmediareq *ifmr = NULL;
 199         int *mwords;
 200
 201         if (ifmr == NULL) {
 202                 ifmr = (struct ifmediareq *)malloc(sizeof(struct ifmediareq));
 203                 if (ifmr == NULL)
 204                         err(1, "malloc");
 205
 206                 (void) memset(ifmr, 0, sizeof(struct ifmediareq));
 207                 (void) strncpy(ifmr->ifm_name, name,
 208                     sizeof(ifmr->ifm_name));
 209
 210                 ifmr->ifm_count = 0;
 211                 ifmr->ifm_ulist = NULL;
 212
 213                 /*
 214                  * We must go through the motions of reading all
 215                  * supported media because we need to know both
 216                  * the current media type and the top-level type.
 217                  */
 218
 219                 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0) {
 220                         err(1, "SIOCGIFMEDIA");
 221                 }
 222
 223                 if (ifmr->ifm_count == 0)
 224                         errx(1, "%s: no media types?", name);
 225
 226                 mwords = (int *)malloc(ifmr->ifm_count * sizeof(int));
 227                 if (mwords == NULL)
 228                         err(1, "malloc");
 229
 230                 ifmr->ifm_ulist = mwords;
 231                 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0)
 232                         err(1, "SIOCGIFMEDIA");
 233         }
 234
 235         return ifmr;
 236 }
 237
 238 static void
 239 setifmediacallback(int s, void *arg)
 240 {
 241         struct ifmediareq *ifmr = (struct ifmediareq *)arg;
 242         static int did_it = 0;
 243
 244         if (!did_it) {
 245                 ifr.ifr_media = ifmr->ifm_current;
 246                 if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
 247                         err(1, "SIOCSIFMEDIA (media)");
 248                 free(ifmr->ifm_ulist);
 249                 free(ifmr);
 250                 did_it = 1;
 251         }
 252 }
 253
 254 static void
 255 setmedia(const char *val, int d, int s, const struct afswtch *afp)
 256 {
 257         struct ifmediareq *ifmr;
 258         int subtype;
 259
 260         ifmr = ifmedia_getstate(s);
 261
 262         /*
 263          * We are primarily concerned with the top-level type.
 264          * However, "current" may be only IFM_NONE, so we just look
 265          * for the top-level type in the first "supported type"
 266          * entry.
 267          *
 268          * (I'm assuming that all supported media types for a given
 269          * interface will be the same top-level type..)
 270          */
 271         subtype = get_media_subtype(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 272
 273         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 274         ifr.ifr_media = (ifmr->ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
 275             IFM_TYPE(ifmr->ifm_ulist[0]) | subtype;
 276
 277         if ((ifr.ifr_media & IFM_TMASK) == 0) {
 278                 ifr.ifr_media &= ~IFM_GMASK;
 279         }
 280
 281         ifmr->ifm_current = ifr.ifr_media;
 282         callback_register(setifmediacallback, (void *)ifmr);
 283 }
 284
 285 static void
 286 setmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 287 {
 288
 289         domediaopt(val, 0, s);
 290 }
 291
 292 static void
 293 unsetmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 294 {
 295
 296         domediaopt(val, 1, s);
 297 }
 298
 299 static void
 300 domediaopt(const char *val, int clear, int s)
 301 {
 302         struct ifmediareq *ifmr;
 303         int options;
 304
 305         ifmr = ifmedia_getstate(s);
 306
 307         options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 308
 309         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 310         ifr.ifr_media = ifmr->ifm_current;
 311         if (clear)
 312                 ifr.ifr_media &= ~options;
 313         else {
 314                 if (options & IFM_HDX) {
 315                         ifr.ifr_media &= ~IFM_FDX;
 316                         options &= ~IFM_HDX;
 317                 }
 318                 ifr.ifr_media |= options;
 319         }
 320         ifmr->ifm_current = ifr.ifr_media;
 321         callback_register(setifmediacallback, (void *)ifmr);
 322 }
 323
 324 static void
 325 setmediainst(const char *val, int d, int s, const struct afswtch *afp)
 326 {
 327         struct ifmediareq *ifmr;
 328         int inst;
 329
 330         ifmr = ifmedia_getstate(s);
 331
 332         inst = atoi(val);
 333         if (inst < 0 || inst > IFM_INST_MAX)
 334                 errx(1, "invalid media instance: %s", val);
 335
 336         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 337         ifr.ifr_media = (ifmr->ifm_current & ~IFM_IMASK) | inst << IFM_ISHIFT;
 338
 339         ifmr->ifm_current = ifr.ifr_media;
 340         callback_register(setifmediacallback, (void *)ifmr);
 341 }
 342
 343 static void
 344 setmediamode(const char *val, int d, int s, const struct afswtch *afp)
 345 {
 346         struct ifmediareq *ifmr;
 347         int mode;
 348
 349         ifmr = ifmedia_getstate(s);
 350
 351         mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 352
 353         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 354         ifr.ifr_media = (ifmr->ifm_current & ~IFM_MMASK) | mode;
 355
 356         ifmr->ifm_current = ifr.ifr_media;
 357         callback_register(setifmediacallback, (void *)ifmr);
 358 }
 359
 360 /**********************************************************************
 361  * A good chunk of this is duplicated from sys/net/ifmedia.c
 362  **********************************************************************/
 363
 364 static struct ifmedia_description ifm_type_descriptions[] =
 365     IFM_TYPE_DESCRIPTIONS;
 366
 367 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
 368     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
 369
 370 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
 371     IFM_SUBTYPE_ETHERNET_ALIASES;
 372
 373 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
 374     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
 375
 376 static struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
 377     IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
 378
 379 static struct ifmedia_description ifm_subtype_tokenring_aliases[] =
 380     IFM_SUBTYPE_TOKENRING_ALIASES;
 381
 382 static struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
 383     IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
 384
 385 static struct ifmedia_description ifm_subtype_fddi_descriptions[] =
 386     IFM_SUBTYPE_FDDI_DESCRIPTIONS;
 387
 388 static struct ifmedia_description ifm_subtype_fddi_aliases[] =
 389     IFM_SUBTYPE_FDDI_ALIASES;
 390
 391 static struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
 392     IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
 393
 394 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
 395     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
 396
 397 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
 398     IFM_SUBTYPE_IEEE80211_ALIASES;
 399
 400 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
 401     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
 402
 403 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
 404     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
 405
 406 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
 407     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
 408
 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
 418 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
 419     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
 420
 421 static struct ifmedia_description ifm_subtype_shared_aliases[] =
 422     IFM_SUBTYPE_SHARED_ALIASES;
 423
 424 static struct ifmedia_description ifm_shared_option_descriptions[] =
 425     IFM_SHARED_OPTION_DESCRIPTIONS;
 426
 427 struct ifmedia_type_to_subtype {
 428         struct {
 429                 struct ifmedia_description *desc;
 430                 int alias;
 431         } subtypes[5];
 432         struct {
 433                 struct ifmedia_description *desc;
 434                 int alias;
 435         } options[3];
 436         struct {
 437                 struct ifmedia_description *desc;
 438                 int alias;
 439         } modes[3];
 440 };
 441
 442 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
 443 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
 444         {
 445                 {
 446                         { &ifm_subtype_shared_descriptions[0], 0 },
 447                         { &ifm_subtype_shared_aliases[0], 1 },
 448                         { &ifm_subtype_ethernet_descriptions[0], 0 },
 449                         { &ifm_subtype_ethernet_aliases[0], 1 },
 450                         { NULL, 0 },
 451                 },
 452                 {
 453                         { &ifm_shared_option_descriptions[0], 0 },
 454                         { &ifm_subtype_ethernet_option_descriptions[0], 0 },
 455                         { NULL, 0 },
 456                 },
 457                 {
 458                         { NULL, 0 },
 459                 },
 460         },
 461         {
 462                 {
 463                         { &ifm_subtype_shared_descriptions[0], 0 },
 464                         { &ifm_subtype_shared_aliases[0], 1 },
 465                         { &ifm_subtype_tokenring_descriptions[0], 0 },
 466                         { &ifm_subtype_tokenring_aliases[0], 1 },
 467                         { NULL, 0 },
 468                 },
 469                 {
 470                         { &ifm_shared_option_descriptions[0], 0 },
 471                         { &ifm_subtype_tokenring_option_descriptions[0], 0 },
 472                         { NULL, 0 },
 473                 },
 474                 {
 475                         { NULL, 0 },
 476                 },
 477         },
 478         {
 479                 {
 480                         { &ifm_subtype_shared_descriptions[0], 0 },
 481                         { &ifm_subtype_shared_aliases[0], 1 },
 482                         { &ifm_subtype_fddi_descriptions[0], 0 },
 483                         { &ifm_subtype_fddi_aliases[0], 1 },
 484                         { NULL, 0 },
 485                 },
 486                 {
 487                         { &ifm_shared_option_descriptions[0], 0 },
 488                         { &ifm_subtype_fddi_option_descriptions[0], 0 },
 489                         { NULL, 0 },
 490                 },
 491                 {
 492                         { NULL, 0 },
 493                 },
 494         },
 495         {
 496                 {
 497                         { &ifm_subtype_shared_descriptions[0], 0 },
 498                         { &ifm_subtype_shared_aliases[0], 1 },
 499                         { &ifm_subtype_ieee80211_descriptions[0], 0 },
 500                         { &ifm_subtype_ieee80211_aliases[0], 1 },
 501                         { NULL, 0 },
 502                 },
 503                 {
 504                         { &ifm_shared_option_descriptions[0], 0 },
 505                         { &ifm_subtype_ieee80211_option_descriptions[0], 0 },
 506                         { NULL, 0 },
 507                 },
 508                 {
 509                         { &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
 510                         { &ifm_subtype_ieee80211_mode_aliases[0], 0 },
 511                         { NULL, 0 },
 512                 },
 513         },
 514         {
 515                 {
 516                         { &ifm_subtype_shared_descriptions[0], 0 },
 517                         { &ifm_subtype_shared_aliases[0], 1 },
 518                         { &ifm_subtype_atm_descriptions[0], 0 },
 519                         { &ifm_subtype_atm_aliases[0], 1 },
 520                         { NULL, 0 },
 521                 },
 522                 {
 523                         { &ifm_shared_option_descriptions[0], 0 },
 524                         { &ifm_subtype_atm_option_descriptions[0], 0 },
 525                         { NULL, 0 },
 526                 },
 527                 {
 528                         { NULL, 0 },
 529                 },
 530         },
 531 };
 532
 533 static int
 534 get_media_subtype(int type, const char *val)
 535 {
 536         struct ifmedia_description *desc;
 537         struct ifmedia_type_to_subtype *ttos;
 538         int rval, i;
 539
 540         /* Find the top-level interface type. */
 541         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 542             desc->ifmt_string != NULL; desc++, ttos++)
 543                 if (type == desc->ifmt_word)
 544                         break;
 545         if (desc->ifmt_string == NULL)
 546                 errx(1, "unknown media type 0x%x", type);
 547
 548         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 549                 rval = lookup_media_word(ttos->subtypes[i].desc, val);
 550                 if (rval != -1)
 551                         return (rval);
 552         }
 553         errx(1, "unknown media subtype: %s", val);
 554         /*NOTREACHED*/
 555 }
 556
 557 static int
 558 get_media_mode(int type, const char *val)
 559 {
 560         struct ifmedia_description *desc;
 561         struct ifmedia_type_to_subtype *ttos;
 562         int rval, i;
 563
 564         /* Find the top-level interface type. */
 565         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 566             desc->ifmt_string != NULL; desc++, ttos++)
 567                 if (type == desc->ifmt_word)
 568                         break;
 569         if (desc->ifmt_string == NULL)
 570                 errx(1, "unknown media mode 0x%x", type);
 571
 572         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 573                 rval = lookup_media_word(ttos->modes[i].desc, val);
 574                 if (rval != -1)
 575                         return (rval);
 576         }
 577         return -1;
 578 }
 579
 580 static int
 581 get_media_options(int type, const char *val)
 582 {
 583         struct ifmedia_description *desc;
 584         struct ifmedia_type_to_subtype *ttos;
 585         char *optlist, *optptr;
 586         int option = 0, i, rval = 0;
 587
 588         /* We muck with the string, so copy it. */
 589         optlist = strdup(val);
 590         if (optlist == NULL)
 591                 err(1, "strdup");
 592
 593         /* Find the top-level interface type. */
 594         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 595             desc->ifmt_string != NULL; desc++, ttos++)
 596                 if (type == desc->ifmt_word)
 597                         break;
 598         if (desc->ifmt_string == NULL)
 599                 errx(1, "unknown media type 0x%x", type);
 600
 601         /*
 602          * Look up the options in the user-provided comma-separated
 603          * list.
 604          */
 605         optptr = optlist;
 606         for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
 607                 for (i = 0; ttos->options[i].desc != NULL; i++) {
 608                         option = lookup_media_word(ttos->options[i].desc, optptr);
 609                         if (option != -1)
 610                                 break;
 611                 }
 612                 if (option == 0)
 613                         errx(1, "unknown option: %s", optptr);
 614                 rval |= option;
 615         }
 616
 617         free(optlist);
 618         return (rval);
 619 }
 620
 621 static int
 622 lookup_media_word(struct ifmedia_description *desc, const char *val)
 623 {
 624
 625         for (; desc->ifmt_string != NULL; desc++)
 626                 if (strcasecmp(desc->ifmt_string, val) == 0)
 627                         return (desc->ifmt_word);
 628
 629         return (-1);
 630 }
 631
 632 static struct ifmedia_description *get_toptype_desc(int ifmw)
 633 {
 634         struct ifmedia_description *desc;
 635
 636         for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
 637                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 638                         break;
 639
 640         return desc;
 641 }
 642
 643 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
 644 {
 645         struct ifmedia_description *desc;
 646         struct ifmedia_type_to_subtype *ttos;
 647
 648         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 649             desc->ifmt_string != NULL; desc++, ttos++)
 650                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 651                         break;
 652
 653         return ttos;
 654 }
 655
 656 static struct ifmedia_description *get_subtype_desc(int ifmw,
 657     struct ifmedia_type_to_subtype *ttos)
 658 {
 659         int i;
 660         struct ifmedia_description *desc;
 661
 662         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 663                 if (ttos->subtypes[i].alias)
 664                         continue;
 665                 for (desc = ttos->subtypes[i].desc;
 666                     desc->ifmt_string != NULL; desc++) {
 667                         if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
 668                                 return desc;
 669                 }
 670         }
 671
 672         return NULL;
 673 }
 674
 675 static struct ifmedia_description *get_mode_desc(int ifmw,
 676     struct ifmedia_type_to_subtype *ttos)
 677 {
 678         int i;
 679         struct ifmedia_description *desc;
 680
 681         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 682                 if (ttos->modes[i].alias)
 683                         continue;
 684                 for (desc = ttos->modes[i].desc;
 685                     desc->ifmt_string != NULL; desc++) {
 686                         if (IFM_MODE(ifmw) == desc->ifmt_word)
 687                                 return desc;
 688                 }
 689         }
 690
 691         return NULL;
 692 }
 693
 694 static void
 695 print_media_word(int ifmw, int print_toptype)
 696 {
 697         struct ifmedia_description *desc;
 698         struct ifmedia_type_to_subtype *ttos;
 699         int seen_option = 0, i;
 700
 701         /* Find the top-level interface type. */
 702         desc = get_toptype_desc(ifmw);
 703         ttos = get_toptype_ttos(ifmw);
 704         if (desc->ifmt_string == NULL) {
 705                 printf("<unknown type>");
 706                 return;
 707         } else if (print_toptype) {
 708                 printf("%s", desc->ifmt_string);
 709         }
 710
 711         /*
 712          * Don't print the top-level type; it's not like we can
 713          * change it, or anything.
 714          */
 715
 716         /* Find subtype. */
 717         desc = get_subtype_desc(ifmw, ttos);
 718         if (desc == NULL) {
 719                 printf("<unknown subtype>");
 720                 return;
 721         }
 722
 723         if (print_toptype)
 724                 putchar(' ');
 725
 726         printf("%s", desc->ifmt_string);
 727
 728         if (print_toptype) {
 729                 desc = get_mode_desc(ifmw, ttos);
 730                 if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
 731                         printf(" mode %s", desc->ifmt_string);
 732         }
 733
 734         /* Find options. */
 735         for (i = 0; ttos->options[i].desc != NULL; i++) {
 736                 if (ttos->options[i].alias)
 737                         continue;
 738                 for (desc = ttos->options[i].desc;
 739                     desc->ifmt_string != NULL; desc++) {
 740                         if (ifmw & desc->ifmt_word) {
 741                                 if (seen_option == 0)
 742                                         printf(" <");
 743                                 printf("%s%s", seen_option++ ? "," : "",
 744                                     desc->ifmt_string);
 745                         }
 746                 }
 747         }
 748         printf("%s", seen_option ? ">" : "");
 749
 750         if (print_toptype && IFM_INST(ifmw) != 0)
 751                 printf(" instance %d", IFM_INST(ifmw));
 752 }
 753
 754 static void
 755 print_media_word_ifconfig(int ifmw)
 756 {
 757         struct ifmedia_description *desc;
 758         struct ifmedia_type_to_subtype *ttos;
 759         int i;
 760
 761         /* Find the top-level interface type. */
 762         desc = get_toptype_desc(ifmw);
 763         ttos = get_toptype_ttos(ifmw);
 764         if (desc->ifmt_string == NULL) {
 765                 printf("<unknown type>");
 766                 return;
 767         }
 768
 769         /*
 770          * Don't print the top-level type; it's not like we can
 771          * change it, or anything.
 772          */
 773
 774         /* Find subtype. */
 775         desc = get_subtype_desc(ifmw, ttos);
 776         if (desc == NULL) {
 777                 printf("<unknown subtype>");
 778                 return;
 779         }
 780
 781         printf("media %s", desc->ifmt_string);
 782
 783         desc = get_mode_desc(ifmw, ttos);
 784         if (desc != NULL)
 785                 printf(" mode %s", desc->ifmt_string);
 786
 787         /* Find options. */
 788         for (i = 0; ttos->options[i].desc != NULL; i++) {
 789                 if (ttos->options[i].alias)
 790                         continue;
 791                 for (desc = ttos->options[i].desc;
 792                     desc->ifmt_string != NULL; desc++) {
 793                         if (ifmw & desc->ifmt_word) {
 794                                 printf(" mediaopt %s", desc->ifmt_string);
 795                         }
 796                 }
 797         }
 798
 799         if (IFM_INST(ifmw) != 0)
 800                 printf(" instance %d", IFM_INST(ifmw));
 801 }
 802
 803 /**********************************************************************
 804  * ...until here.
 805  **********************************************************************/
 806
 807 static struct cmd media_cmds[] = {
 808         DEF_CMD_ARG("media",    setmedia),
 809         DEF_CMD_ARG("mode",     setmediamode),
 810         DEF_CMD_ARG("mediaopt", setmediaopt),
 811         DEF_CMD_ARG("-mediaopt",unsetmediaopt),
 812         DEF_CMD_ARG("inst",     setmediainst),
 813         DEF_CMD_ARG("instance", setmediainst),
 814 };
 815 static struct afswtch af_media = {
 816         .af_name        = "af_media",
 817         .af_af          = AF_UNSPEC,
 818         .af_other_status = media_status,
 819 };
 820
 821 static __constructor void
 822 ifmedia_ctor(void)
 823 {
 824 #define N(a)    (sizeof(a) / sizeof(a[0]))
 825         int i;
 826
 827         for (i = 0; i < N(media_cmds);  i++)
 828                 cmd_register(&media_cmds[i]);
 829         af_register(&af_media);
 830 #undef N
 831 }