package/iwinfo/src/iwinfo_wl.c

   1 /*
   2  * iwinfo - Wireless Information Library - Broadcom wl.o 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  * This code is based on the wlc.c utility published by OpenWrt.org .
  19  */
  20
  21 #include "iwinfo/wl.h"
  22 #include "iwinfo/wext.h"
  23
  24 static int wl_ioctl(const char *name, int cmd, void *buf, int len)
  25 {
  26         struct ifreq ifr;
  27         wl_ioctl_t ioc;
  28
  29         /* do it */
  30         ioc.cmd = cmd;
  31         ioc.buf = buf;
  32         ioc.len = len;
  33
  34         strncpy(ifr.ifr_name, name, IFNAMSIZ);
  35         ifr.ifr_data = (caddr_t) &ioc;
  36
  37         return iwinfo_ioctl(SIOCDEVPRIVATE, &ifr);
  38 }
  39
  40 static int wl_iovar(const char *name, const char *cmd, const char *arg,
  41                                         int arglen, void *buf, int buflen)
  42 {
  43         int cmdlen = strlen(cmd) + 1;
  44
  45         memcpy(buf, cmd, cmdlen);
  46
  47         if (arg && arglen > 0)
  48                 memcpy(buf + cmdlen, arg, arglen);
  49
  50         return wl_ioctl(name, WLC_GET_VAR, buf, buflen);
  51 }
  52
  53 static struct wl_maclist * wl_read_assoclist(const char *ifname)
  54 {
  55         struct wl_maclist *macs;
  56         int maclen = 4 + WL_MAX_STA_COUNT * 6;
  57
  58         if ((macs = (struct wl_maclist *) malloc(maclen)) != NULL)
  59         {
  60                 memset(macs, 0, maclen);
  61                 macs->count = WL_MAX_STA_COUNT;
  62
  63                 if (!wl_ioctl(ifname, WLC_GET_ASSOCLIST, macs, maclen))
  64                         return macs;
  65
  66                 free(macs);
  67         }
  68
  69         return NULL;
  70 }
  71
  72
  73 int wl_probe(const char *ifname)
  74 {
  75         int magic;
  76         return (!wl_ioctl(ifname, WLC_GET_MAGIC, &magic, sizeof(magic)) &&
  77                         (magic == WLC_IOCTL_MAGIC));
  78 }
  79
  80 void wl_close(void)
  81 {
  82         /* Nop */
  83 }
  84
  85 int wl_get_mode(const char *ifname, int *buf)
  86 {
  87         int ret = -1;
  88         int ap, infra, passive;
  89
  90         if ((ret = wl_ioctl(ifname, WLC_GET_AP, &ap, sizeof(ap))))
  91                 return ret;
  92
  93         if ((ret = wl_ioctl(ifname, WLC_GET_INFRA, &infra, sizeof(infra))))
  94                 return ret;
  95
  96         if ((ret = wl_ioctl(ifname, WLC_GET_PASSIVE, &passive, sizeof(passive))))
  97                 return ret;
  98
  99         if (passive)
 100                 *buf = IWINFO_OPMODE_MONITOR;
 101         else if (!infra)
 102                 *buf = IWINFO_OPMODE_ADHOC;
 103         else if (ap)
 104                 *buf = IWINFO_OPMODE_MASTER;
 105         else
 106                 *buf = IWINFO_OPMODE_CLIENT;
 107
 108         return 0;
 109 }
 110
 111 int wl_get_ssid(const char *ifname, char *buf)
 112 {
 113         int ret = -1;
 114         wlc_ssid_t ssid;
 115
 116         if (!(ret = wl_ioctl(ifname, WLC_GET_SSID, &ssid, sizeof(ssid))))
 117                 memcpy(buf, ssid.ssid, ssid.ssid_len);
 118
 119         return ret;
 120 }
 121
 122 int wl_get_bssid(const char *ifname, char *buf)
 123 {
 124         int ret = -1;
 125         char bssid[6];
 126
 127         if (!(ret = wl_ioctl(ifname, WLC_GET_BSSID, bssid, 6)))
 128                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
 129                         (uint8_t)bssid[0], (uint8_t)bssid[1], (uint8_t)bssid[2],
 130                         (uint8_t)bssid[3], (uint8_t)bssid[4], (uint8_t)bssid[5]
 131                 );
 132
 133         return ret;
 134 }
 135
 136 int wl_get_channel(const char *ifname, int *buf)
 137 {
 138         return wl_ioctl(ifname, WLC_GET_CHANNEL, buf, sizeof(buf));
 139 }
 140
 141 int wl_get_frequency(const char *ifname, int *buf)
 142 {
 143         return wext_get_frequency(ifname, buf);
 144 }
 145
 146 int wl_get_txpower(const char *ifname, int *buf)
 147 {
 148         /* WLC_GET_VAR "qtxpower" */
 149         return wext_get_txpower(ifname, buf);
 150 }
 151
 152 int wl_get_bitrate(const char *ifname, int *buf)
 153 {
 154         int ret = -1;
 155         int rate = 0;
 156
 157         if( !(ret = wl_ioctl(ifname, WLC_GET_RATE, &rate, sizeof(rate))) && (rate > 0))
 158                 *buf = ((rate / 2) * 1000) + ((rate & 1) ? 500 : 0);
 159
 160         return ret;
 161 }
 162
 163 int wl_get_signal(const char *ifname, int *buf)
 164 {
 165         unsigned int ap, rssi, i, rssi_count;
 166         int ioctl_req_version = 0x2000;
 167         char tmp[WLC_IOCTL_MAXLEN];
 168         struct wl_maclist *macs = NULL;
 169         wl_sta_rssi_t starssi;
 170
 171         memset(tmp, 0, WLC_IOCTL_MAXLEN);
 172         memcpy(tmp, &ioctl_req_version, sizeof(ioctl_req_version));
 173
 174         wl_ioctl(ifname, WLC_GET_BSS_INFO, tmp, WLC_IOCTL_MAXLEN);
 175
 176         if (!wl_ioctl(ifname, WLC_GET_AP, &ap, sizeof(ap)) && !ap)
 177         {
 178                 *buf = tmp[WL_BSS_RSSI_OFFSET];
 179         }
 180         else
 181         {
 182                 rssi = rssi_count = 0;
 183
 184                 /* Calculate average rssi from conntected stations */
 185                 if ((macs = wl_read_assoclist(ifname)) != NULL)
 186                 {
 187                         for (i = 0; i < macs->count; i++)
 188                         {
 189                                 memcpy(starssi.mac, &macs->ea[i], 6);
 190
 191                                 if (!wl_ioctl(ifname, WLC_GET_RSSI, &starssi, 12))
 192                                 {
 193                                         rssi -= starssi.rssi;
 194                                         rssi_count++;
 195                                 }
 196                         }
 197
 198                         free(macs);
 199                 }
 200
 201                 *buf = (rssi == 0 || rssi_count == 0) ? 1 : -(rssi / rssi_count);
 202         }
 203
 204         return 0;
 205 }
 206
 207 int wl_get_noise(const char *ifname, int *buf)
 208 {
 209         unsigned int ap, noise;
 210         int ioctl_req_version = 0x2000;
 211         char tmp[WLC_IOCTL_MAXLEN];
 212
 213         memset(tmp, 0, WLC_IOCTL_MAXLEN);
 214         memcpy(tmp, &ioctl_req_version, sizeof(ioctl_req_version));
 215
 216         wl_ioctl(ifname, WLC_GET_BSS_INFO, tmp, WLC_IOCTL_MAXLEN);
 217
 218         if ((wl_ioctl(ifname, WLC_GET_AP, &ap, sizeof(ap)) < 0) || ap)
 219         {
 220                 if (wl_ioctl(ifname, WLC_GET_PHY_NOISE, &noise, sizeof(noise)) < 0)
 221                         noise = 0;
 222         }
 223         else
 224         {
 225                 noise = tmp[WL_BSS_NOISE_OFFSET];
 226         }
 227
 228         *buf = noise;
 229
 230         return 0;
 231 }
 232
 233 int wl_get_quality(const char *ifname, int *buf)
 234 {
 235         return wext_get_quality(ifname, buf);
 236 }
 237
 238 int wl_get_quality_max(const char *ifname, int *buf)
 239 {
 240         return wext_get_quality_max(ifname, buf);
 241 }
 242
 243 int wl_get_encryption(const char *ifname, char *buf)
 244 {
 245         uint32_t wsec, wauth, wpa;
 246         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
 247
 248         if( wl_ioctl(ifname, WLC_GET_WPA_AUTH, &wpa,   sizeof(uint32_t)) ||
 249             wl_ioctl(ifname, WLC_GET_WSEC,     &wsec,  sizeof(uint32_t)) ||
 250                 wl_ioctl(ifname, WLC_GET_AUTH,     &wauth, sizeof(uint32_t)) )
 251                         return -1;
 252
 253         switch(wsec)
 254         {
 255                 case 2:
 256                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
 257                         break;
 258
 259                 case 4:
 260                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
 261                         break;
 262
 263                 case 6:
 264                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
 265                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
 266                         break;
 267         }
 268
 269         switch(wpa)
 270         {
 271                 case 0:
 272                         if (wsec && !wauth)
 273                                 c->auth_algs |= IWINFO_AUTH_OPEN;
 274
 275                         else if (wsec && wauth)
 276                                 c->auth_algs |= IWINFO_AUTH_SHARED;
 277
 278                         /* ToDo: evaluate WEP key lengths */
 279                         c->pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
 280                         c->auth_suites |= IWINFO_KMGMT_NONE;
 281                         break;
 282
 283                 case 2:
 284                         c->wpa_version = 1;
 285                         c->auth_suites |= IWINFO_KMGMT_8021x;
 286                         break;
 287
 288                 case 4:
 289                         c->wpa_version = 1;
 290                         c->auth_suites |= IWINFO_KMGMT_PSK;
 291                         break;
 292
 293                 case 32:
 294                 case 64:
 295                         c->wpa_version = 2;
 296                         c->auth_suites |= IWINFO_KMGMT_8021x;
 297                         break;
 298
 299                 case 66:
 300                         c->wpa_version = 3;
 301                         c->auth_suites |= IWINFO_KMGMT_8021x;
 302                         break;
 303
 304                 case 128:
 305                         c->wpa_version = 2;
 306                         c->auth_suites |= IWINFO_KMGMT_PSK;
 307                         break;
 308
 309                 case 132:
 310                         c->wpa_version = 3;
 311                         c->auth_suites |= IWINFO_KMGMT_PSK;
 312                         break;
 313
 314                 default:
 315                         break;
 316         }
 317
 318         c->enabled = (c->wpa_version || c->auth_algs) ? 1 : 0;
 319         c->group_ciphers = c->pair_ciphers;
 320
 321         return 0;
 322 }
 323
 324 int wl_get_enctype(const char *ifname, char *buf)
 325 {
 326         uint32_t wsec, wpa;
 327         char algo[11];
 328
 329         if( wl_ioctl(ifname, WLC_GET_WPA_AUTH, &wpa, sizeof(uint32_t)) ||
 330             wl_ioctl(ifname, WLC_GET_WSEC, &wsec, sizeof(uint32_t)) )
 331                         return -1;
 332
 333         switch(wsec)
 334         {
 335                 case 2:
 336                         sprintf(algo, "TKIP");
 337                         break;
 338
 339                 case 4:
 340                         sprintf(algo, "CCMP");
 341                         break;
 342
 343                 case 6:
 344                         sprintf(algo, "TKIP, CCMP");
 345                         break;
 346         }
 347
 348         switch(wpa)
 349         {
 350                 case 0:
 351                         sprintf(buf, "%s", wsec ? "WEP" : "None");
 352                         break;
 353
 354                 case 2:
 355                         sprintf(buf, "WPA 802.1X (%s)", algo);
 356                         break;
 357
 358                 case 4:
 359                         sprintf(buf, "WPA PSK (%s)", algo);
 360                         break;
 361
 362                 case 32:
 363                         sprintf(buf, "802.1X (%s)", algo);
 364                         break;
 365
 366                 case 64:
 367                         sprintf(buf, "WPA2 802.1X (%s)", algo);
 368                         break;
 369
 370                 case 66:
 371                         sprintf(buf, "mixed WPA/WPA2 802.1X (%s)", algo);
 372                         break;
 373
 374                 case 128:
 375                         sprintf(buf, "WPA2 PSK (%s)", algo);
 376                         break;
 377
 378                 case 132:
 379                         sprintf(buf, "mixed WPA/WPA2 PSK (%s)", algo);
 380                         break;
 381
 382                 default:
 383                         sprintf(buf, "Unknown");
 384         }
 385
 386         return 0;
 387 }
 388
 389 static void wl_get_assoclist_cb(const char *ifname,
 390                                                             struct iwinfo_assoclist_entry *e)
 391 {
 392         wl_sta_info_t sta = { 0 };
 393
 394         if (!wl_iovar(ifname, "sta_info", e->mac, 6, &sta, sizeof(sta)) &&
 395                 (sta.ver >= 2))
 396         {
 397                 e->inactive     = sta.idle * 1000;
 398                 e->rx_packets   = sta.rx_ucast_pkts;
 399                 e->tx_packets   = sta.tx_pkts;
 400                 e->rx_rate.rate = sta.rx_rate;
 401                 e->tx_rate.rate = sta.tx_rate;
 402
 403                 /* ToDo: 11n */
 404                 e->rx_rate.mcs = -1;
 405                 e->tx_rate.mcs = -1;
 406         }
 407 }
 408
 409 int wl_get_assoclist(const char *ifname, char *buf, int *len)
 410 {
 411         int i, j, noise;
 412         int ap, infra, passive;
 413         char line[128];
 414         char macstr[18];
 415         char devstr[IFNAMSIZ];
 416         struct wl_maclist *macs;
 417         struct wl_sta_rssi rssi;
 418         struct iwinfo_assoclist_entry entry;
 419         FILE *arp;
 420
 421         ap = infra = passive = 0;
 422
 423         wl_ioctl(ifname, WLC_GET_AP, &ap, sizeof(ap));
 424         wl_ioctl(ifname, WLC_GET_INFRA, &infra, sizeof(infra));
 425         wl_ioctl(ifname, WLC_GET_PASSIVE, &passive, sizeof(passive));
 426
 427         if (wl_get_noise(ifname, &noise))
 428                 noise = 0;
 429
 430         if ((ap || infra || passive) && ((macs = wl_read_assoclist(ifname)) != NULL))
 431         {
 432                 for (i = 0, j = 0; i < macs->count; i++, j += sizeof(struct iwinfo_assoclist_entry))
 433                 {
 434                         memset(&entry, 0, sizeof(entry));
 435                         memcpy(rssi.mac, &macs->ea[i], 6);
 436
 437                         if (!wl_ioctl(ifname, WLC_GET_RSSI, &rssi, sizeof(struct wl_sta_rssi)))
 438                                 entry.signal = (rssi.rssi - 0x100);
 439                         else
 440                                 entry.signal = 0;
 441
 442                         entry.noise = noise;
 443                         memcpy(entry.mac, &macs->ea[i], 6);
 444                         wl_get_assoclist_cb(ifname, &entry);
 445
 446                         memcpy(&buf[j], &entry, sizeof(entry));
 447                 }
 448
 449                 *len = j;
 450                 free(macs);
 451                 return 0;
 452         }
 453         else if ((arp = fopen("/proc/net/arp", "r")) != NULL)
 454         {
 455                 j = 0;
 456
 457                 while (fgets(line, sizeof(line), arp) != NULL)
 458                 {
 459                         if (sscanf(line, "%*s 0x%*d 0x%*d %17s %*s %s", macstr, devstr) && !strcmp(devstr, ifname))
 460                         {
 461                                 rssi.mac[0] = strtol(&macstr[0],  NULL, 16);
 462                                 rssi.mac[1] = strtol(&macstr[3],  NULL, 16);
 463                                 rssi.mac[2] = strtol(&macstr[6],  NULL, 16);
 464                                 rssi.mac[3] = strtol(&macstr[9],  NULL, 16);
 465                                 rssi.mac[4] = strtol(&macstr[12], NULL, 16);
 466                                 rssi.mac[5] = strtol(&macstr[15], NULL, 16);
 467
 468                                 if (!wl_ioctl(ifname, WLC_GET_RSSI, &rssi, sizeof(struct wl_sta_rssi)))
 469                                         entry.signal = (rssi.rssi - 0x100);
 470                                 else
 471                                         entry.signal = 0;
 472
 473                                 entry.noise = noise;
 474                                 memcpy(entry.mac, rssi.mac, 6);
 475                                 memcpy(&buf[j], &entry, sizeof(entry));
 476
 477                                 j += sizeof(entry);
 478                         }
 479                 }
 480
 481                 *len = j;
 482                 (void) fclose(arp);
 483                 return 0;
 484         }
 485
 486         return -1;
 487 }
 488
 489 int wl_get_txpwrlist(const char *ifname, char *buf, int *len)
 490 {
 491         struct iwinfo_txpwrlist_entry entry;
 492         uint8_t dbm[11] = { 0, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24 };
 493         uint8_t mw[11]  = { 1, 3, 6, 10, 15, 25, 39, 63, 100, 158, 251 };
 494         int i;
 495
 496         for (i = 0; i < 11; i++)
 497         {
 498                 entry.dbm = dbm[i];
 499                 entry.mw  = mw[i];
 500                 memcpy(&buf[i*sizeof(entry)], &entry, sizeof(entry));
 501         }
 502
 503         *len = 11 * sizeof(entry);
 504         return 0;
 505 }
 506
 507 int wl_get_scanlist(const char *ifname, char *buf, int *len)
 508 {
 509         return wext_get_scanlist(ifname, buf, len);
 510 }
 511
 512 int wl_get_freqlist(const char *ifname, char *buf, int *len)
 513 {
 514         return wext_get_freqlist(ifname, buf, len);
 515 }
 516
 517 int wl_get_country(const char *ifname, char *buf)
 518 {
 519         char ccode[WLC_CNTRY_BUF_SZ];
 520
 521         if (!wl_ioctl(ifname, WLC_GET_COUNTRY, ccode, WLC_CNTRY_BUF_SZ))
 522         {
 523                 /* IL0 -> World */
 524                 if (!strcmp(ccode, "IL0"))
 525                         sprintf(buf, "00");
 526
 527                 /* YU -> RS */
 528                 else if (!strcmp(ccode, "YU"))
 529                         sprintf(buf, "RS");
 530
 531                 else
 532                         memcpy(buf, ccode, 2);
 533
 534                 return 0;
 535         }
 536
 537         return -1;
 538 }
 539
 540 int wl_get_countrylist(const char *ifname, char *buf, int *len)
 541 {
 542         int i, count;
 543         char cdata[WLC_IOCTL_MAXLEN];
 544         struct iwinfo_country_entry *c = (struct iwinfo_country_entry *)buf;
 545         wl_country_list_t *cl = (wl_country_list_t *)cdata;
 546
 547         cl->buflen = sizeof(cdata);
 548
 549         if (!wl_ioctl(ifname, WLC_GET_COUNTRY_LIST, cl, cl->buflen))
 550         {
 551                 for (i = 0, count = 0; i < cl->count; i++, c++)
 552                 {
 553                         sprintf(c->ccode, &cl->country_abbrev[i * WLC_CNTRY_BUF_SZ]);
 554                         c->iso3166 = c->ccode[0] * 256 + c->ccode[1];
 555
 556                         /* IL0 -> World */
 557                         if (!strcmp(c->ccode, "IL0"))
 558                                 c->iso3166 = 0x3030;
 559
 560                         /* YU -> RS */
 561                         else if (!strcmp(c->ccode, "YU"))
 562                                 c->iso3166 = 0x5253;
 563                 }
 564
 565                 *len = (i * sizeof(struct iwinfo_country_entry));
 566                 return 0;
 567         }
 568
 569         return -1;
 570 }
 571
 572 int wl_get_hwmodelist(const char *ifname, int *buf)
 573 {
 574         return wext_get_hwmodelist(ifname, buf);
 575 }
 576
 577 int wl_get_mbssid_support(const char *ifname, int *buf)
 578 {
 579         wlc_rev_info_t revinfo;
 580
 581         /* Multi bssid support only works on corerev >= 9 */
 582         if (!wl_ioctl(ifname, WLC_GET_REVINFO, &revinfo, sizeof(revinfo)))
 583         {
 584                 if (revinfo.corerev >= 9)
 585                 {
 586                         *buf = 1;
 587                         return 0;
 588                 }
 589         }
 590
 591         return -1;
 592 }
 593
 594 int wl_get_hardware_id(const char *ifname, char *buf)
 595 {
 596         wlc_rev_info_t revinfo;
 597         struct iwinfo_hardware_id *ids = (struct iwinfo_hardware_id *)buf;
 598
 599         if (wl_ioctl(ifname, WLC_GET_REVINFO, &revinfo, sizeof(revinfo)))
 600                 return -1;
 601
 602         ids->vendor_id = revinfo.vendorid;
 603         ids->device_id = revinfo.deviceid;
 604         ids->subsystem_vendor_id = revinfo.boardvendor;
 605         ids->subsystem_device_id = revinfo.boardid;
 606
 607         return 0;
 608 }
 609
 610 int wl_get_hardware_name(const char *ifname, char *buf)
 611 {
 612         struct iwinfo_hardware_id ids;
 613
 614         if (wl_get_hardware_id(ifname, (char *)&ids))
 615                 return -1;
 616
 617         sprintf(buf, "Broadcom BCM%04X", ids.device_id);
 618
 619         return 0;
 620 }
 621
 622 int wl_get_txpower_offset(const char *ifname, int *buf)
 623 {
 624         FILE *p;
 625         char off[8];
 626
 627         *buf = 0;
 628
 629         if ((p = popen("/usr/sbin/nvram get opo", "r")) != NULL)
 630         {
 631                 if (fread(off, 1, sizeof(off), p))
 632                         *buf = strtoul(off, NULL, 16);
 633
 634                 pclose(p);
 635         }
 636
 637         return 0;
 638 }
 639
 640 int wl_get_frequency_offset(const char *ifname, int *buf)
 641 {
 642         /* Stub */
 643         *buf = 0;
 644         return -1;
 645 }