sbin/ifconfig/ifmedia.c

   1 /*      $NetBSD: ifconfig.c,v 1.34 1997/04/21 01:17:58 lukem Exp $      */
   2 /* $FreeBSD: src/sbin/ifconfig/ifmedia.c,v 1.19.2.1 2006/03/01 22:24:23 glebius Exp $ */
   3
   4 /*
   5  * Copyright (c) 1997 Jason R. Thorpe.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed for the NetBSD Project
  19  *      by Jason R. Thorpe.
  20  * 4. The name of the author may not be used to endorse or promote products
  21  *    derived from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 /*
  37  * Copyright (c) 1983, 1993
  38  *      The Regents of the University of California.  All rights reserved.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  * 1. Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  * 2. Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in the
  47  *    documentation and/or other materials provided with the distribution.
  48  * 3. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  */
  64
  65 #include <sys/param.h>
  66 #include <sys/ioctl.h>
  67 #include <sys/socket.h>
  68 #include <sys/sysctl.h>
  69 #include <sys/time.h>
  70
  71 #include <net/if.h>
  72 #include <net/if_dl.h>
  73 #include <net/if_types.h>
  74 #include <net/if_media.h>
  75 #include <net/route.h>
  76
  77 #include <ctype.h>
  78 #include <err.h>
  79 #include <errno.h>
  80 #include <fcntl.h>
  81 #include <stdio.h>
  82 #include <stdlib.h>
  83 #include <string.h>
  84 #include <unistd.h>
  85
  86 #include "ifconfig.h"
  87
  88 static void     domediaopt(const char *, int, int);
  89 static int      get_media_subtype(int, const char *);
  90 static int      get_media_mode(int, const char *);
  91 static int      get_media_options(int, const char *);
  92 static int      lookup_media_word(struct ifmedia_description *, const char *);
  93 static void     print_media_word(int, int);
  94 static void     print_media_word_ifconfig(int);
  95
  96 static struct ifmedia_description *get_toptype_desc(int);
  97 static struct ifmedia_type_to_subtype *get_toptype_ttos(int);
  98 static struct ifmedia_description *get_subtype_desc(int,
  99     struct ifmedia_type_to_subtype *ttos);
 100
 101 static void
 102 media_status(int s)
 103 {
 104         struct ifmediareq ifmr;
 105         int *media_list, i;
 106         int xmedia = 1;
 107
 108         memset(&ifmr, 0, sizeof(ifmr));
 109         strlcpy(ifmr.ifm_name, IfName, sizeof(ifmr.ifm_name));
 110
 111         /*
 112          * Check if interface supports extended media types.
 113          */
 114         if (ioctl(s, SIOCGIFXMEDIA, &ifmr) < 0)
 115                 xmedia = 0;
 116         if (xmedia == 0 && ioctl(s, SIOCGIFMEDIA, &ifmr) < 0) {
 117                 /*
 118                  * Interface doesn't support SIOC{G,S}IFMEDIA.
 119                  */
 120                 return;
 121         }
 122
 123         if (ifmr.ifm_count == 0) {
 124                 warnx("%s: no media types?", IfName);
 125                 return;
 126         }
 127
 128         media_list = malloc(ifmr.ifm_count * sizeof(int));
 129         if (media_list == NULL)
 130                 err(1, "malloc");
 131         ifmr.ifm_ulist = media_list;
 132
 133         if (xmedia) {
 134                 if (ioctl(s, SIOCGIFXMEDIA, &ifmr) < 0)
 135                         err(1, "SIOCGIFXMEDIA");
 136         } else {
 137                 if (ioctl(s, SIOCGIFMEDIA, &ifmr) < 0)
 138                         err(1, "SIOCGIFMEDIA");
 139         }
 140
 141         printf("\tmedia: ");
 142         print_media_word(ifmr.ifm_current, 1);
 143         if (ifmr.ifm_active != ifmr.ifm_current) {
 144                 putchar(' ');
 145                 putchar('(');
 146                 print_media_word(ifmr.ifm_active, 0);
 147                 putchar(')');
 148         }
 149
 150         putchar('\n');
 151
 152         if (ifmr.ifm_status & IFM_AVALID) {
 153                 printf("\tstatus: ");
 154                 switch (IFM_TYPE(ifmr.ifm_active)) {
 155                 case IFM_ETHER:
 156                         if (ifmr.ifm_status & IFM_ACTIVE)
 157                                 printf("active");
 158                         else
 159                                 printf("no carrier");
 160                         break;
 161
 162                 case IFM_ATM:
 163                         if (ifmr.ifm_status & IFM_ACTIVE)
 164                                 printf("active");
 165                         else
 166                                 printf("no carrier");
 167                         break;
 168
 169                 case IFM_IEEE80211:
 170                         /* XXX: Different value for adhoc? */
 171                         if (ifmr.ifm_status & IFM_ACTIVE)
 172                                 printf("associated");
 173                         else
 174                                 printf("no carrier");
 175                         break;
 176                 case IFM_CARP:
 177                         if (ifmr.ifm_status & IFM_ACTIVE)
 178                                 printf("master");
 179                         else
 180                                 printf("backup");
 181                         break;
 182                 }
 183                 putchar('\n');
 184         }
 185
 186         if (ifmr.ifm_count > 0 && supmedia) {
 187                 printf("\tsupported media:\n");
 188                 for (i = 0; i < ifmr.ifm_count; i++) {
 189                         printf("\t\t");
 190                         print_media_word_ifconfig(media_list[i]);
 191                         putchar('\n');
 192                 }
 193         }
 194
 195         free(media_list);
 196 }
 197
 198 struct ifmediareq *
 199 ifmedia_getstate(int s)
 200 {
 201         static struct ifmediareq *ifmr = NULL;
 202         int *mwords;
 203         int xmedia = 1;
 204
 205         if (ifmr == NULL) {
 206                 ifmr = malloc(sizeof(struct ifmediareq));
 207                 if (ifmr == NULL)
 208                         err(1, "malloc");
 209
 210                 memset(ifmr, 0, sizeof(struct ifmediareq));
 211                 strlcpy(ifmr->ifm_name, IfName, sizeof(ifmr->ifm_name));
 212
 213                 ifmr->ifm_count = 0;
 214                 ifmr->ifm_ulist = NULL;
 215
 216                 /*
 217                  * We must go through the motions of reading all
 218                  * supported media because we need to know both
 219                  * the current media type and the top-level type.
 220                  */
 221
 222                 if (ioctl(s, SIOCGIFXMEDIA, ifmr) < 0)
 223                         xmedia = 0;
 224                 if (xmedia == 0 && ioctl(s, SIOCGIFMEDIA, ifmr) < 0)
 225                         err(1, "SIOCGIFMEDIA");
 226
 227                 if (ifmr->ifm_count == 0)
 228                         errx(1, "%s: no media types?", IfName);
 229
 230                 mwords = malloc(ifmr->ifm_count * sizeof(int));
 231                 if (mwords == NULL)
 232                         err(1, "malloc");
 233
 234                 ifmr->ifm_ulist = mwords;
 235                 if (xmedia) {
 236                         if (ioctl(s, SIOCGIFXMEDIA, ifmr) < 0)
 237                                 err(1, "SIOCGIFXMEDIA");
 238                 } else {
 239                         if (ioctl(s, SIOCGIFMEDIA, ifmr) < 0)
 240                                 err(1, "SIOCGIFMEDIA");
 241                 }
 242         }
 243
 244         return ifmr;
 245 }
 246
 247 static void
 248 setifmediacallback(int s, void *arg)
 249 {
 250         static int did_it = 0;
 251         struct ifmediareq *ifmr = arg;
 252         struct ifreq ifr;
 253
 254         if (!did_it) {
 255                 memset(&ifr, 0, sizeof(ifr));
 256                 strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
 257                 ifr.ifr_media = ifmr->ifm_current;
 258                 if (ioctl(s, SIOCSIFMEDIA, &ifr) < 0)
 259                         err(1, "SIOCSIFMEDIA (media)");
 260                 free(ifmr->ifm_ulist);
 261                 free(ifmr);
 262                 did_it = 1;
 263         }
 264 }
 265
 266 static void
 267 setmedia(const char *val, int d __unused, int s,
 268          const struct afswtch *afp __unused)
 269 {
 270         struct ifmediareq *ifmr;
 271         int subtype;
 272
 273         ifmr = ifmedia_getstate(s);
 274
 275         /*
 276          * We are primarily concerned with the top-level type.
 277          * However, "current" may be only IFM_NONE, so we just look
 278          * for the top-level type in the first "supported type"
 279          * entry.
 280          *
 281          * (I'm assuming that all supported media types for a given
 282          * interface will be the same top-level type..)
 283          */
 284         subtype = get_media_subtype(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 285
 286         ifmr->ifm_current = (ifmr->ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
 287                             IFM_TYPE(ifmr->ifm_ulist[0]) |
 288                             subtype;
 289         if ((ifmr->ifm_current & IFM_TMASK) == 0)
 290                 ifmr->ifm_current &= ~IFM_GMASK;
 291
 292         callback_register(setifmediacallback, ifmr);
 293 }
 294
 295 static void
 296 setmediaopt(const char *val, int d __unused, int s,
 297             const struct afswtch *afp __unused)
 298 {
 299         domediaopt(val, 0, s);
 300 }
 301
 302 static void
 303 unsetmediaopt(const char *val, int d __unused, int s,
 304               const struct afswtch *afp __unused)
 305 {
 306         domediaopt(val, 1, s);
 307 }
 308
 309 static void
 310 domediaopt(const char *val, int clear, int s)
 311 {
 312         struct ifmediareq *ifmr;
 313         int options;
 314
 315         ifmr = ifmedia_getstate(s);
 316
 317         options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 318         if (clear)
 319                 ifmr->ifm_current &= ~options;
 320         else
 321                 ifmr->ifm_current |= options;
 322
 323         callback_register(setifmediacallback, ifmr);
 324 }
 325
 326
 327 static void
 328 setmediamode(const char *val, int d __unused, int s,
 329              const struct afswtch *afp __unused)
 330 {
 331         struct ifmediareq *ifmr;
 332         int mode;
 333
 334         ifmr = ifmedia_getstate(s);
 335
 336         mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
 337         ifmr->ifm_current = (ifmr->ifm_current & ~IFM_MMASK) | mode;
 338
 339         callback_register(setifmediacallback, ifmr);
 340 }
 341
 342 /**********************************************************************
 343  * A good chunk of this is duplicated from sys/net/ifmedia.c
 344  **********************************************************************/
 345
 346 static struct ifmedia_description ifm_type_descriptions[] =
 347     IFM_TYPE_DESCRIPTIONS;
 348
 349 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
 350     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
 351
 352 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
 353     IFM_SUBTYPE_ETHERNET_ALIASES;
 354
 355 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
 356     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
 357
 358 static struct ifmedia_description ifm_subtype_ethernet_option_alias[] =
 359     IFM_SUBTYPE_ETHERNET_OPTION_ALIAS;
 360
 361 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
 362     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
 363
 364 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
 365     IFM_SUBTYPE_IEEE80211_ALIASES;
 366
 367 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
 368     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
 369
 370 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
 371     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
 372
 373 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
 374     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
 375
 376 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
 377     IFM_SUBTYPE_ATM_DESCRIPTIONS;
 378
 379 static struct ifmedia_description ifm_subtype_atm_aliases[] =
 380     IFM_SUBTYPE_ATM_ALIASES;
 381
 382 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
 383     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
 384
 385 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
 386     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
 387
 388 static struct ifmedia_description ifm_subtype_shared_aliases[] =
 389     IFM_SUBTYPE_SHARED_ALIASES;
 390
 391 static struct ifmedia_description ifm_shared_option_descriptions[] =
 392     IFM_SHARED_OPTION_DESCRIPTIONS;
 393
 394 struct ifmedia_type_to_subtype {
 395         struct {
 396                 struct ifmedia_description *desc;
 397                 int alias;
 398         } subtypes[5];
 399         struct {
 400                 struct ifmedia_description *desc;
 401                 int alias;
 402         } options[4];
 403         struct {
 404                 struct ifmedia_description *desc;
 405                 int alias;
 406         } modes[3];
 407 };
 408
 409 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
 410 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
 411         {
 412                 {
 413                         { &ifm_subtype_shared_descriptions[0], 0 },
 414                         { &ifm_subtype_shared_aliases[0], 1 },
 415                         { &ifm_subtype_ethernet_descriptions[0], 0 },
 416                         { &ifm_subtype_ethernet_aliases[0], 1 },
 417                         { NULL, 0 },
 418                 },
 419                 {
 420                         { &ifm_shared_option_descriptions[0], 0 },
 421                         { &ifm_subtype_ethernet_option_descriptions[0], 0 },
 422                         { &ifm_subtype_ethernet_option_alias[0], 1 },
 423                         { NULL, 0 },
 424                 },
 425                 {
 426                         { NULL, 0 },
 427                 },
 428         },
 429         {
 430                 {
 431                         { &ifm_subtype_shared_descriptions[0], 0 },
 432                         { &ifm_subtype_shared_aliases[0], 1 },
 433                         { &ifm_subtype_ieee80211_descriptions[0], 0 },
 434                         { &ifm_subtype_ieee80211_aliases[0], 1 },
 435                         { NULL, 0 },
 436                 },
 437                 {
 438                         { &ifm_shared_option_descriptions[0], 0 },
 439                         { &ifm_subtype_ieee80211_option_descriptions[0], 0 },
 440                         { NULL, 0 },
 441                 },
 442                 {
 443                         { &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
 444                         { &ifm_subtype_ieee80211_mode_aliases[0], 0 },
 445                         { NULL, 0 },
 446                 },
 447         },
 448         {
 449                 {
 450                         { &ifm_subtype_shared_descriptions[0], 0 },
 451                         { &ifm_subtype_shared_aliases[0], 1 },
 452                         { &ifm_subtype_atm_descriptions[0], 0 },
 453                         { &ifm_subtype_atm_aliases[0], 1 },
 454                         { NULL, 0 },
 455                 },
 456                 {
 457                         { &ifm_shared_option_descriptions[0], 0 },
 458                         { &ifm_subtype_atm_option_descriptions[0], 0 },
 459                         { NULL, 0 },
 460                 },
 461                 {
 462                         { NULL, 0 },
 463                 },
 464         },
 465 };
 466
 467 static int
 468 get_media_subtype(int type, const char *val)
 469 {
 470         struct ifmedia_description *desc;
 471         struct ifmedia_type_to_subtype *ttos;
 472         int rval, i;
 473
 474         /* Find the top-level interface type. */
 475         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 476             desc->ifmt_string != NULL; desc++, ttos++)
 477                 if (type == desc->ifmt_word)
 478                         break;
 479         if (desc->ifmt_string == NULL)
 480                 errx(1, "unknown media type 0x%x", type);
 481
 482         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 483                 rval = lookup_media_word(ttos->subtypes[i].desc, val);
 484                 if (rval != -1)
 485                         return (rval);
 486         }
 487         errx(1, "unknown media subtype: %s", val);
 488         /*NOTREACHED*/
 489 }
 490
 491 static int
 492 get_media_mode(int type, const char *val)
 493 {
 494         struct ifmedia_description *desc;
 495         struct ifmedia_type_to_subtype *ttos;
 496         int rval, i;
 497
 498         /* Find the top-level interface type. */
 499         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 500             desc->ifmt_string != NULL; desc++, ttos++)
 501                 if (type == desc->ifmt_word)
 502                         break;
 503         if (desc->ifmt_string == NULL)
 504                 errx(1, "unknown media mode 0x%x", type);
 505
 506         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 507                 rval = lookup_media_word(ttos->modes[i].desc, val);
 508                 if (rval != -1)
 509                         return (rval);
 510         }
 511         return -1;
 512 }
 513
 514 static int
 515 get_media_options(int type, const char *val)
 516 {
 517         struct ifmedia_description *desc;
 518         struct ifmedia_type_to_subtype *ttos;
 519         char *optlist, *optptr;
 520         int option = 0, i, rval = 0;
 521
 522         /* We muck with the string, so copy it. */
 523         optlist = strdup(val);
 524         if (optlist == NULL)
 525                 err(1, "strdup");
 526
 527         /* Find the top-level interface type. */
 528         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 529             desc->ifmt_string != NULL; desc++, ttos++)
 530                 if (type == desc->ifmt_word)
 531                         break;
 532         if (desc->ifmt_string == NULL)
 533                 errx(1, "unknown media type 0x%x", type);
 534
 535         /*
 536          * Look up the options in the user-provided comma-separated
 537          * list.
 538          */
 539         optptr = optlist;
 540         for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
 541                 for (i = 0; ttos->options[i].desc != NULL; i++) {
 542                         option = lookup_media_word(ttos->options[i].desc, optptr);
 543                         if (option != -1)
 544                                 break;
 545                 }
 546                 if (option == 0)
 547                         errx(1, "unknown option: %s", optptr);
 548                 rval |= option;
 549         }
 550
 551         free(optlist);
 552         return (rval);
 553 }
 554
 555 static int
 556 lookup_media_word(struct ifmedia_description *desc, const char *val)
 557 {
 558
 559         for (; desc->ifmt_string != NULL; desc++)
 560                 if (strcasecmp(desc->ifmt_string, val) == 0)
 561                         return (desc->ifmt_word);
 562
 563         return (-1);
 564 }
 565
 566 static struct ifmedia_description *get_toptype_desc(int ifmw)
 567 {
 568         struct ifmedia_description *desc;
 569
 570         for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
 571                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 572                         break;
 573
 574         return desc;
 575 }
 576
 577 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
 578 {
 579         struct ifmedia_description *desc;
 580         struct ifmedia_type_to_subtype *ttos;
 581
 582         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 583             desc->ifmt_string != NULL; desc++, ttos++)
 584                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 585                         break;
 586
 587         return ttos;
 588 }
 589
 590 static struct ifmedia_description *get_subtype_desc(int ifmw,
 591     struct ifmedia_type_to_subtype *ttos)
 592 {
 593         int i;
 594         struct ifmedia_description *desc;
 595
 596         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 597                 if (ttos->subtypes[i].alias)
 598                         continue;
 599                 for (desc = ttos->subtypes[i].desc;
 600                     desc->ifmt_string != NULL; desc++) {
 601                         if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
 602                                 return desc;
 603                 }
 604         }
 605
 606         return NULL;
 607 }
 608
 609 static struct ifmedia_description *get_mode_desc(int ifmw,
 610     struct ifmedia_type_to_subtype *ttos)
 611 {
 612         int i;
 613         struct ifmedia_description *desc;
 614
 615         for (i = 0; ttos->modes[i].desc != NULL; i++) {
 616                 if (ttos->modes[i].alias)
 617                         continue;
 618                 for (desc = ttos->modes[i].desc;
 619                     desc->ifmt_string != NULL; desc++) {
 620                         if (IFM_MODE(ifmw) == desc->ifmt_word)
 621                                 return desc;
 622                 }
 623         }
 624
 625         return NULL;
 626 }
 627
 628 static void
 629 print_media_word(int ifmw, int print_toptype)
 630 {
 631         struct ifmedia_description *desc;
 632         struct ifmedia_type_to_subtype *ttos;
 633         int seen_option = 0, i;
 634
 635         /* Find the top-level interface type. */
 636         desc = get_toptype_desc(ifmw);
 637         ttos = get_toptype_ttos(ifmw);
 638         if (desc->ifmt_string == NULL) {
 639                 printf("<unknown type>");
 640                 return;
 641         } else if (print_toptype) {
 642                 printf("%s", desc->ifmt_string);
 643         }
 644
 645         /*
 646          * Don't print the top-level type; it's not like we can
 647          * change it, or anything.
 648          */
 649
 650         /* Find subtype. */
 651         desc = get_subtype_desc(ifmw, ttos);
 652         if (desc != NULL)
 653                 goto got_subtype;
 654
 655         /* Falling to here means unknown subtype. */
 656         printf("<unknown subtype>");
 657         return;
 658
 659  got_subtype:
 660         if (print_toptype)
 661                 putchar(' ');
 662
 663         printf("%s", desc->ifmt_string);
 664
 665         if (print_toptype) {
 666                 desc = get_mode_desc(ifmw, ttos);
 667                 if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
 668                         printf(" mode %s", desc->ifmt_string);
 669         }
 670
 671         /* Find options. */
 672         for (i = 0; ttos->options[i].desc != NULL; i++) {
 673                 if (ttos->options[i].alias)
 674                         continue;
 675                 for (desc = ttos->options[i].desc;
 676                     desc->ifmt_string != NULL; desc++) {
 677                         if (ifmw & desc->ifmt_word) {
 678                                 if (seen_option == 0)
 679                                         printf(" <");
 680                                 printf("%s%s", seen_option++ ? "," : "",
 681                                     desc->ifmt_string);
 682                         }
 683                 }
 684         }
 685         printf("%s", seen_option ? ">" : "");
 686 }
 687
 688 static void
 689 print_media_word_ifconfig(int ifmw)
 690 {
 691         struct ifmedia_description *desc;
 692         struct ifmedia_type_to_subtype *ttos;
 693         int i;
 694
 695         /* Find the top-level interface type. */
 696         desc = get_toptype_desc(ifmw);
 697         ttos = get_toptype_ttos(ifmw);
 698         if (desc->ifmt_string == NULL) {
 699                 printf("<unknown type>");
 700                 return;
 701         }
 702
 703         /*
 704          * Don't print the top-level type; it's not like we can
 705          * change it, or anything.
 706          */
 707
 708         /* Find subtype. */
 709         desc = get_subtype_desc(ifmw, ttos);
 710         if (desc != NULL)
 711                 goto got_subtype;
 712
 713         /* Falling to here means unknown subtype. */
 714         printf("<unknown subtype>");
 715         return;
 716
 717  got_subtype:
 718         printf("media %s", desc->ifmt_string);
 719
 720         desc = get_mode_desc(ifmw, ttos);
 721         if (desc != NULL)
 722                 printf(" mode %s", desc->ifmt_string);
 723
 724         /* Find options. */
 725         for (i = 0; ttos->options[i].desc != NULL; i++) {
 726                 if (ttos->options[i].alias)
 727                         continue;
 728                 for (desc = ttos->options[i].desc;
 729                     desc->ifmt_string != NULL; desc++) {
 730                         if (ifmw & desc->ifmt_word) {
 731                                 printf(" mediaopt %s", desc->ifmt_string);
 732                         }
 733                 }
 734         }
 735 }
 736
 737 /**********************************************************************
 738  * ...until here.
 739  **********************************************************************/
 740
 741 static struct cmd media_cmds[] = {
 742         DEF_CMD_ARG("media",    setmedia),
 743         DEF_CMD_ARG("mode",     setmediamode),
 744         DEF_CMD_ARG("mediaopt", setmediaopt),
 745         DEF_CMD_ARG("-mediaopt",unsetmediaopt),
 746 };
 747 static struct afswtch af_media = {
 748         .af_name        = "af_media",
 749         .af_af          = AF_UNSPEC,
 750         .af_other_status = media_status,
 751 };
 752
 753 __constructor(123)
 754 static void
 755 ifmedia_ctor(void)
 756 {
 757         size_t i;
 758
 759         for (i = 0; i < nitems(media_cmds);  i++)
 760                 cmd_register(&media_cmds[i]);
 761
 762         af_register(&af_media);
 763 }