package/iwinfo/src/iwinfo_wext.c

   1 /*
   2  * iwinfo - Wireless Information Library - Linux Wireless Extension Backend
   3  *
   4  *   Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
   5  *
   6  * The iwinfo library is free software: you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version 2
   8  * as published by the Free Software Foundation.
   9  *
  10  * The iwinfo library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with the iwinfo library. If not, see http://www.gnu.org/licenses/.
  17  *
  18  * Parts of this code are derived from the Linux wireless tools, iwlib.c,
  19  * iwlist.c and iwconfig.c in particular.
  20  */
  21
  22 #include "iwinfo.h"
  23 #include "iwinfo/wext.h"
  24
  25 static double wext_freq2float(const struct iw_freq *in)
  26 {
  27         int             i;
  28         double  res = (double) in->m;
  29         for(i = 0; i < in->e; i++) res *= 10;
  30         return res;
  31 }
  32
  33 static inline int wext_freq2mhz(const struct iw_freq *in)
  34 {
  35         int i;
  36
  37         if( in->e == 6 )
  38         {
  39                 return in->m;
  40         }
  41         else
  42         {
  43                 return (int)(wext_freq2float(in) / 1000000);
  44         }
  45 }
  46
  47 static inline int wext_ioctl(const char *ifname, int cmd, struct iwreq *wrq)
  48 {
  49         if( !strncmp(ifname, "mon.", 4) )
  50                 strncpy(wrq->ifr_name, &ifname[4], IFNAMSIZ);
  51         else
  52                 strncpy(wrq->ifr_name, ifname, IFNAMSIZ);
  53
  54         return iwinfo_ioctl(cmd, wrq);
  55 }
  56
  57
  58 int wext_probe(const char *ifname)
  59 {
  60         struct iwreq wrq;
  61
  62         if(wext_ioctl(ifname, SIOCGIWNAME, &wrq) >= 0)
  63                 return 1;
  64
  65         return 0;
  66 }
  67
  68 void wext_close(void)
  69 {
  70         /* Nop */
  71 }
  72
  73 int wext_get_mode(const char *ifname, char *buf)
  74 {
  75         struct iwreq wrq;
  76
  77         if(wext_ioctl(ifname, SIOCGIWMODE, &wrq) >= 0)
  78         {
  79                 switch(wrq.u.mode)
  80                 {
  81                         case 0:
  82                                 sprintf(buf, "Auto");
  83                                 break;
  84
  85                         case 1:
  86                                 sprintf(buf, "Ad-Hoc");
  87                                 break;
  88
  89                         case 2:
  90                                 sprintf(buf, "Client");
  91                                 break;
  92
  93                         case 3:
  94                                 sprintf(buf, "Master");
  95                                 break;
  96
  97                         case 4:
  98                                 sprintf(buf, "Repeater");
  99                                 break;
 100
 101                         case 5:
 102                                 sprintf(buf, "Secondary");
 103                                 break;
 104
 105                         case 6:
 106                                 sprintf(buf, "Monitor");
 107                                 break;
 108
 109                         default:
 110                                 sprintf(buf, "Unknown");
 111                 }
 112
 113                 return 0;
 114         }
 115
 116         return -1;
 117 }
 118
 119 int wext_get_ssid(const char *ifname, char *buf)
 120 {
 121         struct iwreq wrq;
 122
 123         wrq.u.essid.pointer = (caddr_t) buf;
 124         wrq.u.essid.length  = IW_ESSID_MAX_SIZE + 1;
 125         wrq.u.essid.flags   = 0;
 126
 127         if(wext_ioctl(ifname, SIOCGIWESSID, &wrq) >= 0)
 128                 return 0;
 129
 130         return -1;
 131 }
 132
 133 int wext_get_bssid(const char *ifname, char *buf)
 134 {
 135         struct iwreq wrq;
 136
 137         if(wext_ioctl(ifname, SIOCGIWAP, &wrq) >= 0)
 138         {
 139                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
 140                         (uint8_t)wrq.u.ap_addr.sa_data[0], (uint8_t)wrq.u.ap_addr.sa_data[1],
 141                         (uint8_t)wrq.u.ap_addr.sa_data[2], (uint8_t)wrq.u.ap_addr.sa_data[3],
 142                         (uint8_t)wrq.u.ap_addr.sa_data[4], (uint8_t)wrq.u.ap_addr.sa_data[5]);
 143
 144                 return 0;
 145         }
 146
 147         return -1;
 148 }
 149
 150 int wext_get_bitrate(const char *ifname, int *buf)
 151 {
 152         struct iwreq wrq;
 153
 154         if(wext_ioctl(ifname, SIOCGIWRATE, &wrq) >= 0)
 155         {
 156                 *buf = (wrq.u.bitrate.value / 1000);
 157                 return 0;
 158         }
 159
 160         return -1;
 161 }
 162
 163 int wext_get_channel(const char *ifname, int *buf)
 164 {
 165         struct iwreq wrq;
 166         struct iw_range range;
 167         double freq;
 168         int i;
 169
 170         if(wext_ioctl(ifname, SIOCGIWFREQ, &wrq) >= 0)
 171         {
 172                 if( wrq.u.freq.m >= 1000 )
 173                 {
 174                         freq = wext_freq2float(&wrq.u.freq);
 175                         wrq.u.data.pointer = (caddr_t) &range;
 176                         wrq.u.data.length  = sizeof(struct iw_range);
 177                         wrq.u.data.flags   = 0;
 178
 179                         if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
 180                         {
 181                                 for(i = 0; i < range.num_frequency; i++)
 182                                 {
 183                                         if( wext_freq2float(&range.freq[i]) == freq )
 184                                         {
 185                                                 *buf = range.freq[i].i;
 186                                                 return 0;
 187                                         }
 188                                 }
 189                         }
 190                 }
 191                 else
 192                 {
 193                         *buf = wrq.u.freq.m;
 194                         return 0;
 195                 }
 196         }
 197
 198         return -1;
 199 }
 200
 201 int wext_get_frequency(const char *ifname, int *buf)
 202 {
 203         struct iwreq wrq;
 204         struct iw_range range;
 205         int i, channel;
 206
 207         if(wext_ioctl(ifname, SIOCGIWFREQ, &wrq) >= 0)
 208         {
 209                 /* We got a channel number instead ... */
 210                 if( wrq.u.freq.m < 1000 )
 211                 {
 212                         channel = wrq.u.freq.m;
 213                         wrq.u.data.pointer = (caddr_t) &range;
 214                         wrq.u.data.length  = sizeof(struct iw_range);
 215                         wrq.u.data.flags   = 0;
 216
 217                         if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
 218                         {
 219                                 for(i = 0; i < range.num_frequency; i++)
 220                                 {
 221                                         if( range.freq[i].i == channel )
 222                                         {
 223                                                 *buf = wext_freq2mhz(&range.freq[i]);
 224                                                 return 0;
 225                                         }
 226                                 }
 227                         }
 228                 }
 229                 else
 230                 {
 231                         *buf = wext_freq2mhz(&wrq.u.freq);
 232                         return 0;
 233                 }
 234         }
 235
 236         return -1;
 237 }
 238
 239 int wext_get_txpower(const char *ifname, int *buf)
 240 {
 241         struct iwreq wrq;
 242
 243         wrq.u.txpower.flags = 0;
 244
 245         if(wext_ioctl(ifname, SIOCGIWTXPOW, &wrq) >= 0)
 246         {
 247                 if(wrq.u.txpower.flags & IW_TXPOW_MWATT)
 248                         *buf = iwinfo_mw2dbm(wrq.u.txpower.value);
 249                 else
 250                         *buf = wrq.u.txpower.value;
 251
 252                 return 0;
 253         }
 254
 255         return -1;
 256 }
 257
 258 int wext_get_signal(const char *ifname, int *buf)
 259 {
 260         struct iwreq wrq;
 261         struct iw_statistics stats;
 262
 263         wrq.u.data.pointer = (caddr_t) &stats;
 264         wrq.u.data.length  = sizeof(struct iw_statistics);
 265         wrq.u.data.flags   = 1;
 266
 267         if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
 268         {
 269                 *buf = (stats.qual.updated & IW_QUAL_DBM)
 270                         ? (stats.qual.level - 0x100) : stats.qual.level;
 271
 272                 return 0;
 273         }
 274
 275         return -1;
 276 }
 277
 278 int wext_get_noise(const char *ifname, int *buf)
 279 {
 280         struct iwreq wrq;
 281         struct iw_statistics stats;
 282
 283         wrq.u.data.pointer = (caddr_t) &stats;
 284         wrq.u.data.length  = sizeof(struct iw_statistics);
 285         wrq.u.data.flags   = 1;
 286
 287         if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
 288         {
 289                 *buf = (stats.qual.updated & IW_QUAL_DBM)
 290                         ? (stats.qual.noise - 0x100) : stats.qual.noise;
 291
 292                 return 0;
 293         }
 294
 295         return -1;
 296 }
 297
 298 int wext_get_quality(const char *ifname, int *buf)
 299 {
 300         struct iwreq wrq;
 301         struct iw_statistics stats;
 302
 303         wrq.u.data.pointer = (caddr_t) &stats;
 304         wrq.u.data.length  = sizeof(struct iw_statistics);
 305         wrq.u.data.flags   = 1;
 306
 307         if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
 308         {
 309                 *buf = stats.qual.qual;
 310                 return 0;
 311         }
 312
 313         return -1;
 314 }
 315
 316 int wext_get_quality_max(const char *ifname, int *buf)
 317 {
 318         struct iwreq wrq;
 319         struct iw_range range;
 320
 321         wrq.u.data.pointer = (caddr_t) &range;
 322         wrq.u.data.length  = sizeof(struct iw_range);
 323         wrq.u.data.flags   = 0;
 324
 325         if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
 326         {
 327                 *buf = range.max_qual.qual;
 328                 return 0;
 329         }
 330
 331         return -1;
 332 }
 333
 334 int wext_get_assoclist(const char *ifname, char *buf, int *len)
 335 {
 336         /* Stub */
 337         return -1;
 338 }
 339
 340 int wext_get_txpwrlist(const char *ifname, char *buf, int *len)
 341 {
 342         struct iwreq wrq;
 343         struct iw_range range;
 344         struct iwinfo_txpwrlist_entry entry;
 345         int i;
 346
 347         wrq.u.data.pointer = (caddr_t) &range;
 348         wrq.u.data.length  = sizeof(struct iw_range);
 349         wrq.u.data.flags   = 0;
 350
 351         if( (wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0) &&
 352             (range.num_txpower > 0) && (range.num_txpower <= IW_MAX_TXPOWER) &&
 353             !(range.txpower_capa & IW_TXPOW_RELATIVE)
 354         ) {
 355                 for( i = 0; i < range.num_txpower; i++ )
 356                 {
 357                         if( range.txpower_capa & IW_TXPOW_MWATT )
 358                         {
 359                                 entry.dbm = iwinfo_mw2dbm(range.txpower[i]);
 360                                 entry.mw  = range.txpower[i];
 361                         }
 362
 363                         /* Madwifi does neither set mW not dBm caps, also iwlist assumes
 364                          * dBm if mW is not set, so don't check here... */
 365                         else /* if( range.txpower_capa & IW_TXPOW_DBM ) */
 366                         {
 367                                 entry.dbm = range.txpower[i];
 368                                 entry.mw  = iwinfo_dbm2mw(range.txpower[i]);
 369                         }
 370
 371                         memcpy(&buf[i*sizeof(entry)], &entry, sizeof(entry));
 372                 }
 373
 374                 *len = i * sizeof(entry);
 375                 return 0;
 376         }
 377
 378         return -1;
 379 }
 380
 381 int wext_get_freqlist(const char *ifname, char *buf, int *len)
 382 {
 383         struct iwreq wrq;
 384         struct iw_range range;
 385         struct iwinfo_freqlist_entry entry;
 386         int i, bl;
 387
 388         wrq.u.data.pointer = (caddr_t) &range;
 389         wrq.u.data.length  = sizeof(struct iw_range);
 390         wrq.u.data.flags   = 0;
 391
 392         if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
 393         {
 394                 bl = 0;
 395
 396                 for(i = 0; i < range.num_frequency; i++)
 397                 {
 398                         entry.mhz        = wext_freq2mhz(&range.freq[i]);
 399                         entry.channel    = range.freq[i].i;
 400                         entry.restricted = 0;
 401
 402                         memcpy(&buf[bl], &entry, sizeof(struct iwinfo_freqlist_entry));
 403                         bl += sizeof(struct iwinfo_freqlist_entry);
 404                 }
 405
 406                 *len = bl;
 407                 return 0;
 408         }
 409
 410         return -1;
 411 }
 412
 413 int wext_get_country(const char *ifname, char *buf)
 414 {
 415         sprintf(buf, "00");
 416         return 0;
 417 }
 418
 419 int wext_get_countrylist(const char *ifname, char *buf, int *len)
 420 {
 421         /* Stub */
 422         return -1;
 423 }
 424
 425 int wext_get_hwmodelist(const char *ifname, int *buf)
 426 {
 427         char chans[IWINFO_BUFSIZE] = { 0 };
 428         struct iwinfo_freqlist_entry *e = NULL;
 429         int len = 0;
 430
 431         *buf = 0;
 432
 433         if( !wext_get_freqlist(ifname, chans, &len) )
 434         {
 435                 for( e = (struct iwinfo_freqlist_entry *)chans; e->channel; e++ )
 436                 {
 437                         if( e->channel <= 14 )
 438                         {
 439                                 *buf |= IWINFO_80211_B;
 440                                 *buf |= IWINFO_80211_G;
 441                         }
 442                         else
 443                         {
 444                                 *buf |= IWINFO_80211_A;
 445                         }
 446                 }
 447
 448                 return 0;
 449         }
 450
 451         return -1;
 452 }
 453
 454 int wext_get_encryption(const char *ifname, char *buf)
 455 {
 456         /* No reliable crypto info in wext */
 457         return -1;
 458 }
 459
 460 int wext_get_mbssid_support(const char *ifname, int *buf)
 461 {
 462         /* No multi bssid support atm */
 463         return -1;
 464 }
 465
 466 static char * wext_sysfs_ifname_file(const char *ifname, const char *path)
 467 {
 468         FILE *f;
 469         static char buf[128];
 470         char *rv = NULL;
 471
 472         snprintf(buf, sizeof(buf), "/sys/class/net/%s/%s", ifname, path);
 473
 474         if ((f = fopen(buf, "r")) != NULL)
 475         {
 476                 memset(buf, 0, sizeof(buf));
 477
 478                 if (fread(buf, 1, sizeof(buf), f))
 479                         rv = buf;
 480
 481                 fclose(f);
 482         }
 483
 484         return rv;
 485 }
 486
 487 int wext_get_hardware_id(const char *ifname, char *buf)
 488 {
 489         char *data;
 490         struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
 491
 492         memset(id, 0, sizeof(struct iwinfo_hardware_id));
 493
 494         data = wext_sysfs_ifname_file(ifname, "device/vendor");
 495         if (data)
 496                 id->vendor_id = strtoul(data, NULL, 16);
 497
 498         data = wext_sysfs_ifname_file(ifname, "device/device");
 499         if (data)
 500                 id->device_id = strtoul(data, NULL, 16);
 501
 502         data = wext_sysfs_ifname_file(ifname, "device/subsystem_device");
 503         if (data)
 504                 id->subsystem_device_id = strtoul(data, NULL, 16);
 505
 506         data = wext_sysfs_ifname_file(ifname, "device/subsystem_vendor");
 507         if (data)
 508                 id->subsystem_vendor_id = strtoul(data, NULL, 16);
 509
 510         return (id->vendor_id > 0 && id->device_id > 0) ? 0 : -1;
 511 }
 512
 513 int wext_get_hardware_name(const char *ifname, char *buf)
 514 {
 515         sprintf(buf, "Generic WEXT");
 516         return 0;
 517 }
 518
 519 int wext_get_txpower_offset(const char *ifname, int *buf)
 520 {
 521         /* Stub */
 522         *buf = 0;
 523         return -1;
 524 }
 525
 526 int wext_get_frequency_offset(const char *ifname, int *buf)
 527 {
 528         /* Stub */
 529         *buf = 0;
 530         return -1;
 531 }