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          IFM_IEEE80211_MBSS))
 109 #define IFM_IEEE80211_STA       0
 110
 111 static void
 112 media_status(int s)
 113 {
 114         struct ifmediareq ifmr;
 115         int *media_list, i;
 116
 117         (void) memset(&ifmr, 0, sizeof(ifmr));
 118         (void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 119
 120         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
 121                 /*
 122                  * Interface doesn't support SIOC{G,S}IFMEDIA.
 123                  */
 124                 return;
 125         }
 126
 127         if (ifmr.ifm_count == 0) {
 128                 warnx("%s: no media types?", name);
 129                 return;
 130         }
 131
 132         media_list = (int *)malloc(ifmr.ifm_count * sizeof(int));
 133         if (media_list == NULL)
 134                 err(1, "malloc");
 135         ifmr.ifm_ulist = media_list;
 136
 137         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
 138                 err(1, "SIOCGIFMEDIA");
 139
 140         printf("\tmedia: ");
 141         print_media_word(ifmr.ifm_current, 1);
 142         if (ifmr.ifm_active != ifmr.ifm_current) {
 143                 putchar(' ');
 144                 putchar('(');
 145                 print_media_word(ifmr.ifm_active, 0);
 146                 putchar(')');
 147         }
 148
 149         putchar('\n');
 150
 151         if (ifmr.ifm_status & IFM_AVALID) {
 152                 printf("\tstatus: ");
 153                 switch (IFM_TYPE(ifmr.ifm_active)) {
 154                 case IFM_ETHER:
 155                 case IFM_ATM:
 156                         if (ifmr.ifm_status & IFM_ACTIVE)
 157                                 printf("active");
 158                         else
 159                                 printf("no carrier");
 160                         break;
 161
 162                 case IFM_FDDI:
 163                 case IFM_TOKEN:
 164                         if (ifmr.ifm_status & IFM_ACTIVE)
 165                                 printf("inserted");
 166                         else
 167                                 printf("no ring");
 168                         break;
 169
 170                 case IFM_IEEE80211:
 171                         if (ifmr.ifm_status & IFM_ACTIVE) {
 172                                 /* NB: only sta mode associates */
 173                                 if (IFM_OPMODE(ifmr.ifm_active) == IFM_IEEE80211_STA)
 174                                         printf("associated");
 175                                 else
 176                                         printf("running");
 177                         } else
 178                                 printf("no carrier");
 179                         break;
 180                 }
 181                 putchar('\n');
 182         }
 183
 184         if (ifmr.ifm_count > 0 && supmedia) {
 185                 printf("\tsupported media:\n");
 186                 for (i = 0; i < ifmr.ifm_count; i++) {
 187                         printf("\t\t");
 188                         print_media_word_ifconfig(media_list[i]);
 189                         putchar('\n');
 190                 }
 191         }
 192
 193         free(media_list);
 194 }
 195
 196 struct ifmediareq *
 197 ifmedia_getstate(int s)
 198 {
 199         static struct ifmediareq *ifmr = NULL;
 200         int *mwords;
 201
 202         if (ifmr == NULL) {
 203                 ifmr = (struct ifmediareq *)malloc(sizeof(struct ifmediareq));
 204                 if (ifmr == NULL)
 205                         err(1, "malloc");
 206
 207                 (void) memset(ifmr, 0, sizeof(struct ifmediareq));
 208                 (void) strncpy(ifmr->ifm_name, name,
 209                     sizeof(ifmr->ifm_name));
 210
 211                 ifmr->ifm_count = 0;
 212                 ifmr->ifm_ulist = NULL;
 213
 214                 /*
 215                  * We must go through the motions of reading all
 216                  * supported media because we need to know both
 217                  * the current media type and the top-level type.
 218                  */
 219
 220                 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0) {
 221                         err(1, "SIOCGIFMEDIA");
 222                 }
 223
 224                 if (ifmr->ifm_count == 0)
 225                         errx(1, "%s: no media types?", name);
 226
 227                 mwords = (int *)malloc(ifmr->ifm_count * sizeof(int));
 228                 if (mwords == NULL)
 229                         err(1, "malloc");
 230
 231                 ifmr->ifm_ulist = mwords;
 232                 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0)
 233                         err(1, "SIOCGIFMEDIA");
 234         }
 235
 236         return ifmr;
 237 }
 238
 239 static void
 240 setifmediacallback(int s, void *arg)
 241 {
 242         struct ifmediareq *ifmr = (struct ifmediareq *)arg;
 243         static int did_it = 0;
 244
 245         if (!did_it) {
 246                 ifr.ifr_media = ifmr->ifm_current;
 247                 if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
 248                         err(1, "SIOCSIFMEDIA (media)");
 249                 free(ifmr->ifm_ulist);
 250                 free(ifmr);
 251                 did_it = 1;
 252         }
 253 }
 254
 255 static void
 256 setmedia(const char *val, int d, int s, const struct afswtch *afp)
 257 {
 258         struct ifmediareq *ifmr;
 259         int subtype;
 260
 261         ifmr = ifmedia_getstate(s);
 262
 263         /*
 264          * We are primarily concerned with the top-level type.
 265          * However, "current" may be only IFM_NONE, so we just look
 266          * for the top-level type in the first "supported type"
 267          * entry.
 268          *
 269          * (I'm assuming that all supported media types for a given
 270          * interface will be the same top-level type..)
 271          */
 272         subtype = get_media_subtype(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 273
 274         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 275         ifr.ifr_media = (ifmr->ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
 276             IFM_TYPE(ifmr->ifm_ulist[0]) | subtype;
 277
 278         if ((ifr.ifr_media & IFM_TMASK) == 0) {
 279                 ifr.ifr_media &= ~(IFM_GMASK | IFM_OMASK);
 280         }
 281
 282         ifmr->ifm_current = ifr.ifr_media;
 283         callback_register(setifmediacallback, (void *)ifmr);
 284 }
 285
 286 static void
 287 setmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 288 {
 289
 290         domediaopt(val, 0, s);
 291 }
 292
 293 static void
 294 unsetmediaopt(const char *val, int d, int s, const struct afswtch *afp)
 295 {
 296
 297         domediaopt(val, 1, s);
 298 }
 299
 300 static void
 301 domediaopt(const char *val, int clear, int s)
 302 {
 303         struct ifmediareq *ifmr;
 304         int options;
 305
 306         ifmr = ifmedia_getstate(s);
 307
 308         options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 309
 310         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 311         ifr.ifr_media = ifmr->ifm_current;
 312         if (clear)
 313                 ifr.ifr_media &= ~options;
 314         else {
 315                 if (options & IFM_HDX) {
 316                         ifr.ifr_media &= ~IFM_FDX;
 317                         options &= ~IFM_HDX;
 318                 }
 319                 ifr.ifr_media |= options;
 320         }
 321         ifmr->ifm_current = ifr.ifr_media;
 322         callback_register(setifmediacallback, (void *)ifmr);
 323 }
 324
 325 static void
 326 setmediainst(const char *val, int d, int s, const struct afswtch *afp)
 327 {
 328         struct ifmediareq *ifmr;
 329         int inst;
 330
 331         ifmr = ifmedia_getstate(s);
 332
 333         inst = atoi(val);
 334         if (inst < 0 || inst > (int)IFM_INST_MAX)
 335                 errx(1, "invalid media instance: %s", val);
 336
 337         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 338         ifr.ifr_media = (ifmr->ifm_current & ~IFM_IMASK) | inst << IFM_ISHIFT;
 339
 340         ifmr->ifm_current = ifr.ifr_media;
 341         callback_register(setifmediacallback, (void *)ifmr);
 342 }
 343
 344 static void
 345 setmediamode(const char *val, int d, int s, const struct afswtch *afp)
 346 {
 347         struct ifmediareq *ifmr;
 348         int mode;
 349
 350         ifmr = ifmedia_getstate(s);
 351
 352         mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 353
 354         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 355         ifr.ifr_media = (ifmr->ifm_current & ~IFM_MMASK) | mode;
 356
 357         ifmr->ifm_current = ifr.ifr_media;
 358         callback_register(setifmediacallback, (void *)ifmr);
 359 }
 360
 361 /**********************************************************************
 362  * A good chunk of this is duplicated from sys/net/ifmedia.c
 363  **********************************************************************/
 364
 365 static struct ifmedia_description ifm_type_descriptions[] =
 366     IFM_TYPE_DESCRIPTIONS;
 367
 368 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
 369     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
 370
 371 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
 372     IFM_SUBTYPE_ETHERNET_ALIASES;
 373
 374 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
 375     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
 376
 377 static struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
 378     IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
 379
 380 static struct ifmedia_description ifm_subtype_tokenring_aliases[] =
 381     IFM_SUBTYPE_TOKENRING_ALIASES;
 382
 383 static struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
 384     IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
 385
 386 static struct ifmedia_description ifm_subtype_fddi_descriptions[] =
 387     IFM_SUBTYPE_FDDI_DESCRIPTIONS;
 388
 389 static struct ifmedia_description ifm_subtype_fddi_aliases[] =
 390     IFM_SUBTYPE_FDDI_ALIASES;
 391
 392 static struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
 393     IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
 394
 395 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
 396     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
 397
 398 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
 399     IFM_SUBTYPE_IEEE80211_ALIASES;
 400
 401 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
 402     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
 403
 404 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
 405     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
 406
 407 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
 408     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
 409
 410 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
 411     IFM_SUBTYPE_ATM_DESCRIPTIONS;
 412
 413 static struct ifmedia_description ifm_subtype_atm_aliases[] =
 414     IFM_SUBTYPE_ATM_ALIASES;
 415
 416 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
 417     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
 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 static struct ifmedia_description ifm_shared_option_aliases[] =
 429     IFM_SHARED_OPTION_ALIASES;
 430
 431 struct ifmedia_type_to_subtype {
 432         struct {
 433                 struct ifmedia_description *desc;
 434                 int alias;
 435         } subtypes[5];
 436         struct {
 437                 struct ifmedia_description *desc;
 438                 int alias;
 439         } options[4];
 440         struct {
 441                 struct ifmedia_description *desc;
 442                 int alias;
 443         } modes[3];
 444 };
 445
 446 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
 447 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
 448         {
 449                 {
 450                         { &ifm_subtype_shared_descriptions[0], 0 },
 451                         { &ifm_subtype_shared_aliases[0], 1 },
 452                         { &ifm_subtype_ethernet_descriptions[0], 0 },
 453                         { &ifm_subtype_ethernet_aliases[0], 1 },
 454                         { NULL, 0 },
 455                 },
 456                 {
 457                         { &ifm_shared_option_descriptions[0], 0 },
 458                         { &ifm_shared_option_aliases[0], 1 },
 459                         { &ifm_subtype_ethernet_option_descriptions[0], 0 },
 460                         { NULL, 0 },
 461                 },
 462                 {
 463                         { NULL, 0 },
 464                 },
 465         },
 466         {
 467                 {
 468                         { &ifm_subtype_shared_descriptions[0], 0 },
 469                         { &ifm_subtype_shared_aliases[0], 1 },
 470                         { &ifm_subtype_tokenring_descriptions[0], 0 },
 471                         { &ifm_subtype_tokenring_aliases[0], 1 },
 472                         { NULL, 0 },
 473                 },
 474                 {
 475                         { &ifm_shared_option_descriptions[0], 0 },
 476                         { &ifm_shared_option_aliases[0], 1 },
 477                         { &ifm_subtype_tokenring_option_descriptions[0], 0 },
 478                         { NULL, 0 },
 479                 },
 480                 {
 481                         { NULL, 0 },
 482                 },
 483         },
 484         {
 485                 {
 486                         { &ifm_subtype_shared_descriptions[0], 0 },
 487                         { &ifm_subtype_shared_aliases[0], 1 },
 488                         { &ifm_subtype_fddi_descriptions[0], 0 },
 489                         { &ifm_subtype_fddi_aliases[0], 1 },
 490                         { NULL, 0 },
 491                 },
 492                 {
 493                         { &ifm_shared_option_descriptions[0], 0 },
 494                         { &ifm_shared_option_aliases[0], 1 },
 495                         { &ifm_subtype_fddi_option_descriptions[0], 0 },
 496                         { NULL, 0 },
 497                 },
 498                 {
 499                         { NULL, 0 },
 500                 },
 501         },
 502         {
 503                 {
 504                         { &ifm_subtype_shared_descriptions[0], 0 },
 505                         { &ifm_subtype_shared_aliases[0], 1 },
 506                         { &ifm_subtype_ieee80211_descriptions[0], 0 },
 507                         { &ifm_subtype_ieee80211_aliases[0], 1 },
 508                         { NULL, 0 },
 509                 },
 510                 {
 511                         { &ifm_shared_option_descriptions[0], 0 },
 512                         { &ifm_shared_option_aliases[0], 1 },
 513                         { &ifm_subtype_ieee80211_option_descriptions[0], 0 },
 514                         { NULL, 0 },
 515                 },
 516                 {
 517                         { &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
 518                         { &ifm_subtype_ieee80211_mode_aliases[0], 0 },
 519                         { NULL, 0 },
 520                 },
 521         },
 522         {
 523                 {
 524                         { &ifm_subtype_shared_descriptions[0], 0 },
 525                         { &ifm_subtype_shared_aliases[0], 1 },
 526                         { &ifm_subtype_atm_descriptions[0], 0 },
 527                         { &ifm_subtype_atm_aliases[0], 1 },
 528                         { NULL, 0 },
 529                 },
 530                 {
 531                         { &ifm_shared_option_descriptions[0], 0 },
 532                         { &ifm_shared_option_aliases[0], 1 },
 533                         { &ifm_subtype_atm_option_descriptions[0], 0 },
 534                         { NULL, 0 },
 535                 },
 536                 {
 537                         { NULL, 0 },
 538                 },
 539         },
 540 };
 541
 542 static int
 543 get_media_subtype(int type, const char *val)
 544 {
 545         struct ifmedia_description *desc;
 546         struct ifmedia_type_to_subtype *ttos;
 547         int rval, i;
 548
 549         /* Find the top-level interface type. */
 550         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 551             desc->ifmt_string != NULL; desc++, ttos++)
 552                 if (type == desc->ifmt_word)
 553                         break;
 554         if (desc->ifmt_string == NULL)
 555                 errx(1, "unknown media type 0x%x", type);
 556
 557         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 558                 rval = lookup_media_word(ttos->subtypes[i].desc, val);
 559                 if (rval != -1)
 560                         return (rval);
 561         }
 562         errx(1, "unknown media subtype: %s", val);
 563         /*NOTREACHED*/
 564 }
 565
 566 static int
 567 get_media_mode(int type, const char *val)
 568 {
 569         struct ifmedia_description *desc;
 570         struct ifmedia_type_to_subtype *ttos;
 571         int rval, i;
 572
 573         /* Find the top-level interface type. */
 574         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 575             desc->ifmt_string != NULL; desc++, ttos++)
 576                 if (type == desc->ifmt_word)
 577                         break;
 578         if (desc->ifmt_string == NULL)
 579                 errx(1, "unknown media mode 0x%x", type);
 580
 581         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 582                 rval = lookup_media_word(ttos->modes[i].desc, val);
 583                 if (rval != -1)
 584                         return (rval);
 585         }
 586         return -1;
 587 }
 588
 589 static int
 590 get_media_options(int type, const char *val)
 591 {
 592         struct ifmedia_description *desc;
 593         struct ifmedia_type_to_subtype *ttos;
 594         char *optlist, *optptr;
 595         int option = 0, i, rval = 0;
 596
 597         /* We muck with the string, so copy it. */
 598         optlist = strdup(val);
 599         if (optlist == NULL)
 600                 err(1, "strdup");
 601
 602         /* Find the top-level interface type. */
 603         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 604             desc->ifmt_string != NULL; desc++, ttos++)
 605                 if (type == desc->ifmt_word)
 606                         break;
 607         if (desc->ifmt_string == NULL)
 608                 errx(1, "unknown media type 0x%x", type);
 609
 610         /*
 611          * Look up the options in the user-provided comma-separated
 612          * list.
 613          */
 614         optptr = optlist;
 615         for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
 616                 for (i = 0; ttos->options[i].desc != NULL; i++) {
 617                         option = lookup_media_word(ttos->options[i].desc, optptr);
 618                         if (option != -1)
 619                                 break;
 620                 }
 621                 if (option == 0)
 622                         errx(1, "unknown option: %s", optptr);
 623                 rval |= option;
 624         }
 625
 626         free(optlist);
 627         return (rval);
 628 }
 629
 630 static int
 631 lookup_media_word(struct ifmedia_description *desc, const char *val)
 632 {
 633
 634         for (; desc->ifmt_string != NULL; desc++)
 635                 if (strcasecmp(desc->ifmt_string, val) == 0)
 636                         return (desc->ifmt_word);
 637
 638         return (-1);
 639 }
 640
 641 static struct ifmedia_description *get_toptype_desc(int ifmw)
 642 {
 643         struct ifmedia_description *desc;
 644
 645         for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
 646                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 647                         break;
 648
 649         return desc;
 650 }
 651
 652 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
 653 {
 654         struct ifmedia_description *desc;
 655         struct ifmedia_type_to_subtype *ttos;
 656
 657         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 658             desc->ifmt_string != NULL; desc++, ttos++)
 659                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 660                         break;
 661
 662         return ttos;
 663 }
 664
 665 static struct ifmedia_description *get_subtype_desc(int ifmw,
 666     struct ifmedia_type_to_subtype *ttos)
 667 {
 668         int i;
 669         struct ifmedia_description *desc;
 670
 671         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 672                 if (ttos->subtypes[i].alias)
 673                         continue;
 674                 for (desc = ttos->subtypes[i].desc;
 675                     desc->ifmt_string != NULL; desc++) {
 676                         if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
 677                                 return desc;
 678                 }
 679         }
 680
 681         return NULL;
 682 }
 683
 684 static struct ifmedia_description *get_mode_desc(int ifmw,
 685     struct ifmedia_type_to_subtype *ttos)
 686 {
 687         int i;
 688         struct ifmedia_description *desc;
 689
 690         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 691                 if (ttos->modes[i].alias)
 692                         continue;
 693                 for (desc = ttos->modes[i].desc;
 694                     desc->ifmt_string != NULL; desc++) {
 695                         if (IFM_MODE(ifmw) == desc->ifmt_word)
 696                                 return desc;
 697                 }
 698         }
 699
 700         return NULL;
 701 }
 702
 703 static void
 704 print_media_word(int ifmw, int print_toptype)
 705 {
 706         struct ifmedia_description *desc;
 707         struct ifmedia_type_to_subtype *ttos;
 708         int seen_option = 0, i;
 709
 710         /* Find the top-level interface type. */
 711         desc = get_toptype_desc(ifmw);
 712         ttos = get_toptype_ttos(ifmw);
 713         if (desc->ifmt_string == NULL) {
 714                 printf("<unknown type>");
 715                 return;
 716         } else if (print_toptype) {
 717                 printf("%s", desc->ifmt_string);
 718         }
 719
 720         /*
 721          * Don't print the top-level type; it's not like we can
 722          * change it, or anything.
 723          */
 724
 725         /* Find subtype. */
 726         desc = get_subtype_desc(ifmw, ttos);
 727         if (desc == NULL) {
 728                 printf("<unknown subtype>");
 729                 return;
 730         }
 731
 732         if (print_toptype)
 733                 putchar(' ');
 734
 735         printf("%s", desc->ifmt_string);
 736
 737         if (print_toptype) {
 738                 desc = get_mode_desc(ifmw, ttos);
 739                 if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
 740                         printf(" mode %s", desc->ifmt_string);
 741         }
 742
 743         /* Find options. */
 744         for (i = 0; ttos->options[i].desc != NULL; i++) {
 745                 if (ttos->options[i].alias)
 746                         continue;
 747                 for (desc = ttos->options[i].desc;
 748                     desc->ifmt_string != NULL; desc++) {
 749                         if (ifmw & desc->ifmt_word) {
 750                                 if (seen_option == 0)
 751                                         printf(" <");
 752                                 printf("%s%s", seen_option++ ? "," : "",
 753                                     desc->ifmt_string);
 754                         }
 755                 }
 756         }
 757         printf("%s", seen_option ? ">" : "");
 758
 759         if (print_toptype && IFM_INST(ifmw) != 0)
 760                 printf(" instance %d", IFM_INST(ifmw));
 761 }
 762
 763 static void
 764 print_media_word_ifconfig(int ifmw)
 765 {
 766         struct ifmedia_description *desc;
 767         struct ifmedia_type_to_subtype *ttos;
 768         int seen_option = 0, i;
 769
 770         /* Find the top-level interface type. */
 771         desc = get_toptype_desc(ifmw);
 772         ttos = get_toptype_ttos(ifmw);
 773         if (desc->ifmt_string == NULL) {
 774                 printf("<unknown type>");
 775                 return;
 776         }
 777
 778         /*
 779          * Don't print the top-level type; it's not like we can
 780          * change it, or anything.
 781          */
 782
 783         /* Find subtype. */
 784         desc = get_subtype_desc(ifmw, ttos);
 785         if (desc == NULL) {
 786                 printf("<unknown subtype>");
 787                 return;
 788         }
 789
 790         printf("media %s", desc->ifmt_string);
 791
 792         desc = get_mode_desc(ifmw, ttos);
 793         if (desc != NULL)
 794                 printf(" mode %s", desc->ifmt_string);
 795
 796         /* Find options. */
 797         for (i = 0; ttos->options[i].desc != NULL; i++) {
 798                 if (ttos->options[i].alias)
 799                         continue;
 800                 for (desc = ttos->options[i].desc;
 801                     desc->ifmt_string != NULL; desc++) {
 802                         if (ifmw & desc->ifmt_word) {
 803                                 if (seen_option == 0)
 804                                         printf(" mediaopt ");
 805                                 printf("%s%s", seen_option++ ? "," : "",
 806                                     desc->ifmt_string);
 807                         }
 808                 }
 809         }
 810
 811         if (IFM_INST(ifmw) != 0)
 812                 printf(" instance %d", IFM_INST(ifmw));
 813 }
 814
 815 /**********************************************************************
 816  * ...until here.
 817  **********************************************************************/
 818
 819 static struct cmd media_cmds[] = {
 820         DEF_CMD_ARG("media",    setmedia),
 821         DEF_CMD_ARG("mode",     setmediamode),
 822         DEF_CMD_ARG("mediaopt", setmediaopt),
 823         DEF_CMD_ARG("-mediaopt",unsetmediaopt),
 824         DEF_CMD_ARG("inst",     setmediainst),
 825         DEF_CMD_ARG("instance", setmediainst),
 826 };
 827 static struct afswtch af_media = {
 828         .af_name        = "af_media",
 829         .af_af          = AF_UNSPEC,
 830         .af_other_status = media_status,
 831 };
 832
 833 static __constructor void
 834 ifmedia_ctor(void)
 835 {
 836 #define N(a)    (sizeof(a) / sizeof(a[0]))
 837         size_t i;
 838
 839         for (i = 0; i < N(media_cmds);  i++)
 840                 cmd_register(&media_cmds[i]);
 841         af_register(&af_media);
 842 #undef N
 843 }