sbin/ifconfig/ifmedia.c

   1 /*      $NetBSD: ifconfig.c,v 1.34 1997/04/21 01:17:58 lukem Exp $      */
   2 /* $FreeBSD: src/sbin/ifconfig/ifmedia.c,v 1.6.2.3 2001/11/14 04:35:07 yar Exp $ */
   3 /* $DragonFly: src/sbin/ifconfig/ifmedia.c,v 1.2 2003/06/17 04:27:33 dillon Exp $ */
   4
   5 /*
   6  * Copyright (c) 1997 Jason R. Thorpe.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project
  20  *      by Jason R. Thorpe.
  21  * 4. The name of the author may not be used to endorse or promote products
  22  *    derived from this software without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  25  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  27  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  29  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  30  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  31  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  32  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 /*
  38  * Copyright (c) 1983, 1993
  39  *      The Regents of the University of California.  All rights reserved.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *      This product includes software developed by the University of
  52  *      California, Berkeley and its contributors.
  53  * 4. Neither the name of the University nor the names of its contributors
  54  *    may be used to endorse or promote products derived from this software
  55  *    without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  58  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  59  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  60  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  61  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  62  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  63  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  64  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  65  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  66  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  67  * SUCH DAMAGE.
  68  */
  69
  70 #include <sys/param.h>
  71 #include <sys/ioctl.h>
  72 #include <sys/socket.h>
  73 #include <sys/sysctl.h>
  74 #include <sys/time.h>
  75
  76 #include <net/if.h>
  77 #include <net/if_dl.h>
  78 #include <net/if_types.h>
  79 #include <net/if_media.h>
  80 #include <net/route.h>
  81
  82 #include <ctype.h>
  83 #include <err.h>
  84 #include <errno.h>
  85 #include <fcntl.h>
  86 #include <stdio.h>
  87 #include <stdlib.h>
  88 #include <string.h>
  89 #include <unistd.h>
  90
  91 #include "ifconfig.h"
  92
  93 static void     domediaopt __P((const char *, int, int));
  94 static int      get_media_subtype __P((int, const char *));
  95 static int      get_media_options __P((int, const char *));
  96 static int      lookup_media_word __P((struct ifmedia_description *, const char *));
  97 static void     print_media_word __P((int, int));
  98 static void     print_media_word_ifconfig __P((int));
  99
 100 static struct ifmedia_description *get_toptype_desc __P((int));
 101 static struct ifmedia_type_to_subtype *get_toptype_ttos __P((int));
 102 static struct ifmedia_description *get_subtype_desc __P((int,
 103     struct ifmedia_type_to_subtype *ttos));
 104
 105 void
 106 media_status(s, info)
 107         int s;
 108         struct rt_addrinfo *info __unused;
 109 {
 110         struct ifmediareq ifmr;
 111         int *media_list, i;
 112
 113         (void) memset(&ifmr, 0, sizeof(ifmr));
 114         (void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 115
 116         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&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?", name);
 125                 return;
 126         }
 127
 128         media_list = (int *)malloc(ifmr.ifm_count * sizeof(int));
 129         if (media_list == NULL)
 130                 err(1, "malloc");
 131         ifmr.ifm_ulist = media_list;
 132
 133         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
 134                 err(1, "SIOCGIFMEDIA");
 135
 136         printf("\tmedia: ");
 137         print_media_word(ifmr.ifm_current, 1);
 138         if (ifmr.ifm_active != ifmr.ifm_current) {
 139                 putchar(' ');
 140                 putchar('(');
 141                 print_media_word(ifmr.ifm_active, 0);
 142                 putchar(')');
 143         }
 144
 145         putchar('\n');
 146
 147         if (ifmr.ifm_status & IFM_AVALID) {
 148                 printf("\tstatus: ");
 149                 switch (IFM_TYPE(ifmr.ifm_active)) {
 150                 case IFM_ETHER:
 151                         if (ifmr.ifm_status & IFM_ACTIVE)
 152                                 printf("active");
 153                         else
 154                                 printf("no carrier");
 155                         break;
 156
 157                 case IFM_FDDI:
 158                 case IFM_TOKEN:
 159                         if (ifmr.ifm_status & IFM_ACTIVE)
 160                                 printf("inserted");
 161                         else
 162                                 printf("no ring");
 163                         break;
 164                 case IFM_IEEE80211:
 165                         /* XXX: Different value for adhoc? */
 166                         if (ifmr.ifm_status & IFM_ACTIVE)
 167                                 printf("associated");
 168                         else
 169                                 printf("no carrier");
 170                         break;
 171                 }
 172                 putchar('\n');
 173         }
 174
 175         if (ifmr.ifm_count > 0 && supmedia) {
 176                 printf("\tsupported media:\n");
 177                 for (i = 0; i < ifmr.ifm_count; i++) {
 178                         printf("\t\t");
 179                         print_media_word_ifconfig(media_list[i]);
 180                         putchar('\n');
 181                 }
 182         }
 183
 184         free(media_list);
 185 }
 186
 187 void
 188 setmedia(val, d, s, afp)
 189         const char *val;
 190         int d;
 191         int s;
 192         const struct afswtch *afp;
 193 {
 194         struct ifmediareq ifmr;
 195         int first_type, subtype;
 196
 197         (void) memset(&ifmr, 0, sizeof(ifmr));
 198         (void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 199
 200         ifmr.ifm_count = 1;
 201         ifmr.ifm_ulist = &first_type;
 202         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
 203                 /*
 204                  * If we get E2BIG, the kernel is telling us
 205                  * that there are more, so we can ignore it.
 206                  */
 207                 if (errno != E2BIG)
 208                         err(1, "SIOCGIFMEDIA");
 209         }
 210
 211         if (ifmr.ifm_count == 0)
 212                 errx(1, "%s: no media types?", name);
 213
 214         /*
 215          * We are primarily concerned with the top-level type.
 216          * However, "current" may be only IFM_NONE, so we just look
 217          * for the top-level type in the first "supported type"
 218          * entry.
 219          *
 220          * (I'm assuming that all supported media types for a given
 221          * interface will be the same top-level type..)
 222          */
 223         subtype = get_media_subtype(IFM_TYPE(first_type), val);
 224
 225         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 226         ifr.ifr_media = (ifmr.ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
 227             IFM_TYPE(first_type) | subtype;
 228
 229         if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
 230                 err(1, "SIOCSIFMEDIA");
 231 }
 232
 233 void
 234 setmediaopt(val, d, s, afp)
 235         const char *val;
 236         int d;
 237         int s;
 238         const struct afswtch *afp;
 239 {
 240
 241         domediaopt(val, 0, s);
 242 }
 243
 244 void
 245 unsetmediaopt(val, d, s, afp)
 246         const char *val;
 247         int d;
 248         int s;
 249         const struct afswtch *afp;
 250 {
 251
 252         domediaopt(val, 1, s);
 253 }
 254
 255 static void
 256 domediaopt(val, clear, s)
 257         const char *val;
 258         int clear;
 259         int s;
 260 {
 261         struct ifmediareq ifmr;
 262         int *mwords, options;
 263
 264         (void) memset(&ifmr, 0, sizeof(ifmr));
 265         (void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
 266
 267         /*
 268          * We must go through the motions of reading all
 269          * supported media because we need to know both
 270          * the current media type and the top-level type.
 271          */
 272
 273         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
 274                 err(1, "SIOCGIFMEDIA");
 275
 276         if (ifmr.ifm_count == 0)
 277                 errx(1, "%s: no media types?", name);
 278
 279         mwords = (int *)malloc(ifmr.ifm_count * sizeof(int));
 280         if (mwords == NULL)
 281                 err(1, "malloc");
 282
 283         ifmr.ifm_ulist = mwords;
 284         if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
 285                 err(1, "SIOCGIFMEDIA");
 286
 287         options = get_media_options(IFM_TYPE(mwords[0]), val);
 288
 289         free(mwords);
 290
 291         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
 292         ifr.ifr_media = ifmr.ifm_current;
 293         if (clear)
 294                 ifr.ifr_media &= ~options;
 295         else
 296                 ifr.ifr_media |= options;
 297
 298         if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
 299                 err(1, "SIOCSIFMEDIA");
 300 }
 301
 302 /**********************************************************************
 303  * A good chunk of this is duplicated from sys/net/ifmedia.c
 304  **********************************************************************/
 305
 306 static struct ifmedia_description ifm_type_descriptions[] =
 307     IFM_TYPE_DESCRIPTIONS;
 308
 309 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
 310     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
 311
 312 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
 313     IFM_SUBTYPE_ETHERNET_ALIASES;
 314
 315 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
 316     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
 317
 318 static struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
 319     IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
 320
 321 static struct ifmedia_description ifm_subtype_tokenring_aliases[] =
 322     IFM_SUBTYPE_TOKENRING_ALIASES;
 323
 324 static struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
 325     IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
 326
 327 static struct ifmedia_description ifm_subtype_fddi_descriptions[] =
 328     IFM_SUBTYPE_FDDI_DESCRIPTIONS;
 329
 330 static struct ifmedia_description ifm_subtype_fddi_aliases[] =
 331     IFM_SUBTYPE_FDDI_ALIASES;
 332
 333 static struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
 334     IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
 335
 336 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
 337     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
 338
 339 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
 340     IFM_SUBTYPE_IEEE80211_ALIASES;
 341
 342 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
 343     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
 344
 345 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
 346     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
 347
 348 static struct ifmedia_description ifm_subtype_shared_aliases[] =
 349     IFM_SUBTYPE_SHARED_ALIASES;
 350
 351 static struct ifmedia_description ifm_shared_option_descriptions[] =
 352     IFM_SHARED_OPTION_DESCRIPTIONS;
 353
 354 struct ifmedia_type_to_subtype {
 355         struct {
 356                 struct ifmedia_description *desc;
 357                 int alias;
 358         } subtypes[5];
 359         struct {
 360                 struct ifmedia_description *desc;
 361                 int alias;
 362         } options[3];
 363 };
 364
 365 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
 366 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
 367         {
 368                 {
 369                         { &ifm_subtype_shared_descriptions[0], 0 },
 370                         { &ifm_subtype_shared_aliases[0], 1 },
 371                         { &ifm_subtype_ethernet_descriptions[0], 0 },
 372                         { &ifm_subtype_ethernet_aliases[0], 1 },
 373                         { NULL, 0 },
 374                 },
 375                 {
 376                         { &ifm_shared_option_descriptions[0], 0 },
 377                         { &ifm_subtype_ethernet_option_descriptions[0], 0 },
 378                         { NULL, 0 },
 379                 },
 380         },
 381         {
 382                 {
 383                         { &ifm_subtype_shared_descriptions[0], 0 },
 384                         { &ifm_subtype_shared_aliases[0], 1 },
 385                         { &ifm_subtype_tokenring_descriptions[0], 0 },
 386                         { &ifm_subtype_tokenring_aliases[0], 1 },
 387                         { NULL, 0 },
 388                 },
 389                 {
 390                         { &ifm_shared_option_descriptions[0], 0 },
 391                         { &ifm_subtype_tokenring_option_descriptions[0], 0 },
 392                         { NULL, 0 },
 393                 },
 394         },
 395         {
 396                 {
 397                         { &ifm_subtype_shared_descriptions[0], 0 },
 398                         { &ifm_subtype_shared_aliases[0], 1 },
 399                         { &ifm_subtype_fddi_descriptions[0], 0 },
 400                         { &ifm_subtype_fddi_aliases[0], 1 },
 401                         { NULL, 0 },
 402                 },
 403                 {
 404                         { &ifm_shared_option_descriptions[0], 0 },
 405                         { &ifm_subtype_fddi_option_descriptions[0], 0 },
 406                         { NULL, 0 },
 407                 },
 408         },
 409         {
 410                 {
 411                         { &ifm_subtype_shared_descriptions[0], 0 },
 412                         { &ifm_subtype_shared_aliases[0], 1 },
 413                         { &ifm_subtype_ieee80211_descriptions[0], 0 },
 414                         { &ifm_subtype_ieee80211_aliases[0], 1 },
 415                         { NULL, 0 },
 416                 },
 417                 {
 418                         { &ifm_shared_option_descriptions[0], 0 },
 419                         { &ifm_subtype_ieee80211_option_descriptions[0], 0 },
 420                         { NULL, 0 },
 421                 },
 422         },
 423 };
 424
 425 static int
 426 get_media_subtype(type, val)
 427         int type;
 428         const char *val;
 429 {
 430         struct ifmedia_description *desc;
 431         struct ifmedia_type_to_subtype *ttos;
 432         int rval, i;
 433
 434         /* Find the top-level interface type. */
 435         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 436             desc->ifmt_string != NULL; desc++, ttos++)
 437                 if (type == desc->ifmt_word)
 438                         break;
 439         if (desc->ifmt_string == NULL)
 440                 errx(1, "unknown media type 0x%x", type);
 441
 442         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 443                 rval = lookup_media_word(ttos->subtypes[i].desc, val);
 444                 if (rval != -1)
 445                         return (rval);
 446         }
 447         errx(1, "unknown media subtype: %s", val);
 448         /* NOTREACHED */
 449 }
 450
 451 static int
 452 get_media_options(type, val)
 453         int type;
 454         const char *val;
 455 {
 456         struct ifmedia_description *desc;
 457         struct ifmedia_type_to_subtype *ttos;
 458         char *optlist, *optptr;
 459         int option = 0, i, rval = 0;
 460
 461         /* We muck with the string, so copy it. */
 462         optlist = strdup(val);
 463         if (optlist == NULL)
 464                 err(1, "strdup");
 465
 466         /* Find the top-level interface type. */
 467         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 468             desc->ifmt_string != NULL; desc++, ttos++)
 469                 if (type == desc->ifmt_word)
 470                         break;
 471         if (desc->ifmt_string == NULL)
 472                 errx(1, "unknown media type 0x%x", type);
 473
 474         /*
 475          * Look up the options in the user-provided comma-separated
 476          * list.
 477          */
 478         optptr = optlist;
 479         for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
 480                 for (i = 0; ttos->options[i].desc != NULL; i++) {
 481                         option = lookup_media_word(ttos->options[i].desc, optptr);
 482                         if (option != -1)
 483                                 break;
 484                 }
 485                 if (option == 0)
 486                         errx(1, "unknown option: %s", optptr);
 487                 rval |= option;
 488         }
 489
 490         free(optlist);
 491         return (rval);
 492 }
 493
 494 static int
 495 lookup_media_word(desc, val)
 496         struct ifmedia_description *desc;
 497         const char *val;
 498 {
 499
 500         for (; desc->ifmt_string != NULL; desc++)
 501                 if (strcasecmp(desc->ifmt_string, val) == 0)
 502                         return (desc->ifmt_word);
 503
 504         return (-1);
 505 }
 506
 507 static struct ifmedia_description *get_toptype_desc(ifmw)
 508         int ifmw;
 509 {
 510         struct ifmedia_description *desc;
 511
 512         for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
 513                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 514                         break;
 515
 516         return desc;
 517 }
 518
 519 static struct ifmedia_type_to_subtype *get_toptype_ttos(ifmw)
 520         int ifmw;
 521 {
 522         struct ifmedia_description *desc;
 523         struct ifmedia_type_to_subtype *ttos;
 524
 525         for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
 526             desc->ifmt_string != NULL; desc++, ttos++)
 527                 if (IFM_TYPE(ifmw) == desc->ifmt_word)
 528                         break;
 529
 530         return ttos;
 531 }
 532
 533 static struct ifmedia_description *get_subtype_desc(ifmw, ttos)
 534         int ifmw;
 535         struct ifmedia_type_to_subtype *ttos;
 536 {
 537         int i;
 538         struct ifmedia_description *desc;
 539
 540         for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
 541                 if (ttos->subtypes[i].alias)
 542                         continue;
 543                 for (desc = ttos->subtypes[i].desc;
 544                     desc->ifmt_string != NULL; desc++) {
 545                         if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
 546                                 return desc;
 547                 }
 548         }
 549
 550         return NULL;
 551 }
 552
 553 static void
 554 print_media_word(ifmw, print_toptype)
 555         int ifmw;
 556         int print_toptype;
 557 {
 558         struct ifmedia_description *desc;
 559         struct ifmedia_type_to_subtype *ttos;
 560         int seen_option = 0, i;
 561
 562         /* Find the top-level interface type. */
 563         desc = get_toptype_desc(ifmw);
 564         ttos = get_toptype_ttos(ifmw);
 565         if (desc->ifmt_string == NULL) {
 566                 printf("<unknown type>");
 567                 return;
 568         } else if (print_toptype) {
 569                 printf("%s", desc->ifmt_string);
 570         }
 571
 572         /*
 573          * Don't print the top-level type; it's not like we can
 574          * change it, or anything.
 575          */
 576
 577         /* Find subtype. */
 578         desc = get_subtype_desc(ifmw, ttos);
 579         if (desc != NULL)
 580                 goto got_subtype;
 581
 582         /* Falling to here means unknown subtype. */
 583         printf("<unknown subtype>");
 584         return;
 585
 586  got_subtype:
 587         if (print_toptype)
 588                 putchar(' ');
 589
 590         printf("%s", desc->ifmt_string);
 591
 592         /* Find options. */
 593         for (i = 0; ttos->options[i].desc != NULL; i++) {
 594                 if (ttos->options[i].alias)
 595                         continue;
 596                 for (desc = ttos->options[i].desc;
 597                     desc->ifmt_string != NULL; desc++) {
 598                         if (ifmw & desc->ifmt_word) {
 599                                 if (seen_option == 0)
 600                                         printf(" <");
 601                                 printf("%s%s", seen_option++ ? "," : "",
 602                                     desc->ifmt_string);
 603                         }
 604                 }
 605         }
 606         printf("%s", seen_option ? ">" : "");
 607 }
 608
 609 static void
 610 print_media_word_ifconfig(ifmw)
 611         int ifmw;
 612 {
 613         struct ifmedia_description *desc;
 614         struct ifmedia_type_to_subtype *ttos;
 615         int i;
 616
 617         /* Find the top-level interface type. */
 618         desc = get_toptype_desc(ifmw);
 619         ttos = get_toptype_ttos(ifmw);
 620         if (desc->ifmt_string == NULL) {
 621                 printf("<unknown type>");
 622                 return;
 623         }
 624
 625         /*
 626          * Don't print the top-level type; it's not like we can
 627          * change it, or anything.
 628          */
 629
 630         /* Find subtype. */
 631         desc = get_subtype_desc(ifmw, ttos);
 632         if (desc != NULL)
 633                 goto got_subtype;
 634
 635         /* Falling to here means unknown subtype. */
 636         printf("<unknown subtype>");
 637         return;
 638
 639  got_subtype:
 640         printf("media %s", desc->ifmt_string);
 641
 642         /* Find options. */
 643         for (i = 0; ttos->options[i].desc != NULL; i++) {
 644                 if (ttos->options[i].alias)
 645                         continue;
 646                 for (desc = ttos->options[i].desc;
 647                     desc->ifmt_string != NULL; desc++) {
 648                         if (ifmw & desc->ifmt_word) {
 649                                 printf(" mediaopt %s", desc->ifmt_string);
 650                         }
 651                 }
 652         }
 653 }
 654
 655 /**********************************************************************
 656  * ...until here.
 657  **********************************************************************/