package/iwinfo/src/iwinfo_cli.c

   1 /*
   2  * iwinfo - Wireless Information Library - Command line frontend
   3  *
   4  *   Copyright (C) 2011 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
  19 #include <stdio.h>
  20
  21 #include "iwinfo.h"
  22
  23
  24 static char * format_bssid(unsigned char *mac)
  25 {
  26         static char buf[18];
  27
  28         snprintf(buf, sizeof(buf), "%02X:%02X:%02X:%02X:%02X:%02X",
  29                 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
  30
  31         return buf;
  32 }
  33
  34 static char * format_ssid(char *ssid)
  35 {
  36         static char buf[IWINFO_ESSID_MAX_SIZE+3];
  37
  38         if (ssid && ssid[0])
  39                 snprintf(buf, sizeof(buf), "\"%s\"", ssid);
  40         else
  41                 snprintf(buf, sizeof(buf), "unknown");
  42
  43         return buf;
  44 }
  45
  46 static char * format_channel(int ch)
  47 {
  48         static char buf[8];
  49
  50         if (ch <= 0)
  51                 snprintf(buf, sizeof(buf), "unknown");
  52         else
  53                 snprintf(buf, sizeof(buf), "%d", ch);
  54
  55         return buf;
  56 }
  57
  58 static char * format_frequency(int freq)
  59 {
  60         static char buf[10];
  61
  62         if (freq <= 0)
  63                 snprintf(buf, sizeof(buf), "unknown");
  64         else
  65                 snprintf(buf, sizeof(buf), "%.3f GHz", ((float)freq / 1000.0));
  66
  67         return buf;
  68 }
  69
  70 static char * format_txpower(int pwr)
  71 {
  72         static char buf[10];
  73
  74         if (pwr < 0)
  75                 snprintf(buf, sizeof(buf), "unknown");
  76         else
  77                 snprintf(buf, sizeof(buf), "%d dBm", pwr);
  78
  79         return buf;
  80 }
  81
  82 static char * format_quality(int qual)
  83 {
  84         static char buf[8];
  85
  86         if (qual < 0)
  87                 snprintf(buf, sizeof(buf), "unknown");
  88         else
  89                 snprintf(buf, sizeof(buf), "%d", qual);
  90
  91         return buf;
  92 }
  93
  94 static char * format_quality_max(int qmax)
  95 {
  96         static char buf[8];
  97
  98         if (qmax < 0)
  99                 snprintf(buf, sizeof(buf), "unknown");
 100         else
 101                 snprintf(buf, sizeof(buf), "%d", qmax);
 102
 103         return buf;
 104 }
 105
 106 static char * format_signal(int sig)
 107 {
 108         static char buf[10];
 109
 110         if (!sig)
 111                 snprintf(buf, sizeof(buf), "unknown");
 112         else
 113                 snprintf(buf, sizeof(buf), "%d dBm", sig);
 114
 115         return buf;
 116 }
 117
 118 static char * format_noise(int noise)
 119 {
 120         static char buf[10];
 121
 122         if (!noise)
 123                 snprintf(buf, sizeof(buf), "unknown");
 124         else
 125                 snprintf(buf, sizeof(buf), "%d dBm", noise);
 126
 127         return buf;
 128 }
 129
 130 static char * format_rate(int rate)
 131 {
 132         static char buf[14];
 133
 134         if (rate <= 0)
 135                 snprintf(buf, sizeof(buf), "unknown");
 136         else
 137                 snprintf(buf, sizeof(buf), "%.1f MBit/s", ((float)rate / 1000.0));
 138
 139         return buf;
 140 }
 141
 142 static char * format_enc_ciphers(int ciphers)
 143 {
 144         static char str[128] = { 0 };
 145         char *pos = str;
 146
 147         if (ciphers & IWINFO_CIPHER_WEP40)
 148                 pos += sprintf(pos, "WEP-40, ");
 149
 150         if (ciphers & IWINFO_CIPHER_WEP104)
 151                 pos += sprintf(pos, "WEP-104, ");
 152
 153         if (ciphers & IWINFO_CIPHER_TKIP)
 154                 pos += sprintf(pos, "TKIP, ");
 155
 156         if (ciphers & IWINFO_CIPHER_CCMP)
 157                 pos += sprintf(pos, "CCMP, ");
 158
 159         if (ciphers & IWINFO_CIPHER_WRAP)
 160                 pos += sprintf(pos, "WRAP, ");
 161
 162         if (ciphers & IWINFO_CIPHER_AESOCB)
 163                 pos += sprintf(pos, "AES-OCB, ");
 164
 165         if (ciphers & IWINFO_CIPHER_CKIP)
 166                 pos += sprintf(pos, "CKIP, ");
 167
 168         if (!ciphers || (ciphers & IWINFO_CIPHER_NONE))
 169                 pos += sprintf(pos, "NONE, ");
 170
 171         *(pos - 2) = 0;
 172
 173         return str;
 174 }
 175
 176 static char * format_enc_suites(int suites)
 177 {
 178         static char str[64] = { 0 };
 179         char *pos = str;
 180
 181         if (suites & IWINFO_KMGMT_PSK)
 182                 pos += sprintf(pos, "PSK/");
 183
 184         if (suites & IWINFO_KMGMT_8021x)
 185                 pos += sprintf(pos, "802.1X/");
 186
 187         if (!suites || (suites & IWINFO_KMGMT_NONE))
 188                 pos += sprintf(pos, "NONE/");
 189
 190         *(pos - 1) = 0;
 191
 192         return str;
 193 }
 194
 195 static char * format_encryption(struct iwinfo_crypto_entry *c)
 196 {
 197         static char buf[512];
 198
 199         if (!c)
 200         {
 201                 snprintf(buf, sizeof(buf), "unknown");
 202         }
 203         else if (c->enabled)
 204         {
 205                 /* WEP */
 206                 if (c->auth_algs && !c->wpa_version)
 207                 {
 208                         if ((c->auth_algs & IWINFO_AUTH_OPEN) &&
 209                                 (c->auth_algs & IWINFO_AUTH_SHARED))
 210                         {
 211                                 snprintf(buf, sizeof(buf), "WEP Open/Shared (%s)",
 212                                         format_enc_ciphers(c->pair_ciphers));
 213                         }
 214                         else if (c->auth_algs & IWINFO_AUTH_OPEN)
 215                         {
 216                                 snprintf(buf, sizeof(buf), "WEP Open System (%s)",
 217                                         format_enc_ciphers(c->pair_ciphers));
 218                         }
 219                         else if (c->auth_algs & IWINFO_AUTH_SHARED)
 220                         {
 221                                 snprintf(buf, sizeof(buf), "WEP Shared Auth (%s)",
 222                                         format_enc_ciphers(c->pair_ciphers));
 223                         }
 224                 }
 225
 226                 /* WPA */
 227                 else if (c->wpa_version)
 228                 {
 229                         switch (c->wpa_version) {
 230                                 case 3:
 231                                         snprintf(buf, sizeof(buf), "mixed WPA/WPA2 %s (%s)",
 232                                                 format_enc_suites(c->auth_suites),
 233                                                 format_enc_ciphers(c->pair_ciphers & c->group_ciphers));
 234                                         break;
 235
 236                                 case 2:
 237                                         snprintf(buf, sizeof(buf), "WPA2 %s (%s)",
 238                                                 format_enc_suites(c->auth_suites),
 239                                                 format_enc_ciphers(c->pair_ciphers & c->group_ciphers));
 240                                         break;
 241
 242                                 case 1:
 243                                         snprintf(buf, sizeof(buf), "WPA %s (%s)",
 244                                                 format_enc_suites(c->auth_suites),
 245                                                 format_enc_ciphers(c->pair_ciphers & c->group_ciphers));
 246                                         break;
 247                         }
 248                 }
 249                 else
 250                 {
 251                         snprintf(buf, sizeof(buf), "none");
 252                 }
 253         }
 254         else
 255         {
 256                 snprintf(buf, sizeof(buf), "none");
 257         }
 258
 259         return buf;
 260 }
 261
 262 static char * format_hwmodes(int modes)
 263 {
 264         static char buf[12];
 265
 266         if (modes <= 0)
 267                 snprintf(buf, sizeof(buf), "unknown");
 268         else
 269                 snprintf(buf, sizeof(buf), "802.11%s%s%s%s",
 270                         (modes & IWINFO_80211_A) ? "a" : "",
 271                         (modes & IWINFO_80211_B) ? "b" : "",
 272                         (modes & IWINFO_80211_G) ? "g" : "",
 273                         (modes & IWINFO_80211_N) ? "n" : "");
 274
 275         return buf;
 276 }
 277
 278 static char * format_assocrate(struct iwinfo_rate_entry *r)
 279 {
 280         static char buf[40];
 281         char *p = buf;
 282         int l = sizeof(buf);
 283
 284         if (r->rate <= 0)
 285         {
 286                 snprintf(buf, sizeof(buf), "unknown");
 287         }
 288         else
 289         {
 290                 p += snprintf(p, l, "%s", format_rate(r->rate));
 291                 l = sizeof(buf) - (p - buf);
 292
 293                 if (r->mcs >= 0)
 294                 {
 295                         p += snprintf(p, l, ", MCS %d, %dMHz", r->mcs, 20 + r->is_40mhz*20);
 296                         l = sizeof(buf) - (p - buf);
 297
 298                         if (r->is_short_gi)
 299                                 p += snprintf(p, l, ", short GI");
 300                 }
 301         }
 302
 303         return buf;
 304 }
 305
 306
 307 static const char * print_type(const struct iwinfo_ops *iw, const char *ifname)
 308 {
 309         const char *type = iwinfo_type(ifname);
 310         return type ? type : "unknown";
 311 }
 312
 313 static char * print_hardware_id(const struct iwinfo_ops *iw, const char *ifname)
 314 {
 315         static char buf[20];
 316         struct iwinfo_hardware_id ids;
 317
 318         if (!iw->hardware_id(ifname, (char *)&ids))
 319         {
 320                 snprintf(buf, sizeof(buf), "%04X:%04X %04X:%04X",
 321                         ids.vendor_id, ids.device_id,
 322                         ids.subsystem_vendor_id, ids.subsystem_device_id);
 323         }
 324         else
 325         {
 326                 snprintf(buf, sizeof(buf), "unknown");
 327         }
 328
 329         return buf;
 330 }
 331
 332 static char * print_hardware_name(const struct iwinfo_ops *iw, const char *ifname)
 333 {
 334         static char buf[128];
 335
 336         if (iw->hardware_name(ifname, buf))
 337                 snprintf(buf, sizeof(buf), "unknown");
 338
 339         return buf;
 340 }
 341
 342 static char * print_txpower_offset(const struct iwinfo_ops *iw, const char *ifname)
 343 {
 344         int off;
 345         static char buf[12];
 346
 347         if (iw->txpower_offset(ifname, &off))
 348                 snprintf(buf, sizeof(buf), "unknown");
 349         else if (off != 0)
 350                 snprintf(buf, sizeof(buf), "%d dB", off);
 351         else
 352                 snprintf(buf, sizeof(buf), "none");
 353
 354         return buf;
 355 }
 356
 357 static char * print_frequency_offset(const struct iwinfo_ops *iw, const char *ifname)
 358 {
 359         int off;
 360         static char buf[12];
 361
 362         if (iw->frequency_offset(ifname, &off))
 363                 snprintf(buf, sizeof(buf), "unknown");
 364         else if (off != 0)
 365                 snprintf(buf, sizeof(buf), "%.3f GHz", ((float)off / 1000.0));
 366         else
 367                 snprintf(buf, sizeof(buf), "none");
 368
 369         return buf;
 370 }
 371
 372 static char * print_ssid(const struct iwinfo_ops *iw, const char *ifname)
 373 {
 374         char buf[IWINFO_ESSID_MAX_SIZE+1] = { 0 };
 375
 376         if (iw->ssid(ifname, buf))
 377                 memset(buf, 0, sizeof(buf));
 378
 379         return format_ssid(buf);
 380 }
 381
 382 static char * print_bssid(const struct iwinfo_ops *iw, const char *ifname)
 383 {
 384         static char buf[18] = { 0 };
 385
 386         if (iw->bssid(ifname, buf))
 387                 snprintf(buf, sizeof(buf), "00:00:00:00:00:00");
 388
 389         return buf;
 390 }
 391
 392 static char * print_mode(const struct iwinfo_ops *iw, const char *ifname)
 393 {
 394         static char buf[128];
 395
 396         if (iw->mode(ifname, buf))
 397                 snprintf(buf, sizeof(buf), "unknown");
 398
 399         return buf;
 400 }
 401
 402 static char * print_channel(const struct iwinfo_ops *iw, const char *ifname)
 403 {
 404         int ch;
 405         if (iw->channel(ifname, &ch))
 406                 ch = -1;
 407
 408         return format_channel(ch);
 409 }
 410
 411 static char * print_frequency(const struct iwinfo_ops *iw, const char *ifname)
 412 {
 413         int freq;
 414         if (iw->frequency(ifname, &freq))
 415                 freq = -1;
 416
 417         return format_frequency(freq);
 418 }
 419
 420 static char * print_txpower(const struct iwinfo_ops *iw, const char *ifname)
 421 {
 422         int pwr, off;
 423         if (iw->txpower_offset(ifname, &off))
 424                 off = 0;
 425
 426         if (iw->txpower(ifname, &pwr))
 427                 pwr = -1;
 428         else
 429                 pwr += off;
 430
 431         return format_txpower(pwr);
 432 }
 433
 434 static char * print_quality(const struct iwinfo_ops *iw, const char *ifname)
 435 {
 436         int qual;
 437         if (iw->quality(ifname, &qual))
 438                 qual = -1;
 439
 440         return format_quality(qual);
 441 }
 442
 443 static char * print_quality_max(const struct iwinfo_ops *iw, const char *ifname)
 444 {
 445         int qmax;
 446         if (iw->quality_max(ifname, &qmax))
 447                 qmax = -1;
 448
 449         return format_quality_max(qmax);
 450 }
 451
 452 static char * print_signal(const struct iwinfo_ops *iw, const char *ifname)
 453 {
 454         int sig;
 455         if (iw->signal(ifname, &sig))
 456                 sig = 0;
 457
 458         return format_signal(sig);
 459 }
 460
 461 static char * print_noise(const struct iwinfo_ops *iw, const char *ifname)
 462 {
 463         int noise;
 464         if (iw->noise(ifname, &noise))
 465                 noise = 0;
 466
 467         return format_noise(noise);
 468 }
 469
 470 static char * print_rate(const struct iwinfo_ops *iw, const char *ifname)
 471 {
 472         int rate;
 473         if (iw->bitrate(ifname, &rate))
 474                 rate = -1;
 475
 476         return format_rate(rate);
 477 }
 478
 479 static char * print_encryption(const struct iwinfo_ops *iw, const char *ifname)
 480 {
 481         struct iwinfo_crypto_entry c = { 0 };
 482         if (iw->encryption(ifname, (char *)&c))
 483                 return format_encryption(NULL);
 484
 485         return format_encryption(&c);
 486 }
 487
 488 static char * print_hwmodes(const struct iwinfo_ops *iw, const char *ifname)
 489 {
 490         int modes;
 491         if (iw->hwmodelist(ifname, &modes))
 492                 modes = -1;
 493
 494         return format_hwmodes(modes);
 495 }
 496
 497 static char * print_mbssid_supp(const struct iwinfo_ops *iw, const char *ifname)
 498 {
 499         int supp;
 500         static char buf[4];
 501
 502         if (iw->mbssid_support(ifname, &supp))
 503                 snprintf(buf, sizeof(buf), "no");
 504         else
 505                 snprintf(buf, sizeof(buf), "%s", supp ? "yes" : "no");
 506
 507         return buf;
 508 }
 509
 510
 511 static void print_info(const struct iwinfo_ops *iw, const char *ifname)
 512 {
 513         printf("%-9s ESSID: %s\n",
 514                 ifname,
 515                 print_ssid(iw, ifname));
 516         printf("          Access Point: %s\n",
 517                 print_bssid(iw, ifname));
 518         printf("          Mode: %s  Channel: %s (%s)\n",
 519                 print_mode(iw, ifname),
 520                 print_channel(iw, ifname),
 521                 print_frequency(iw, ifname));
 522         printf("          Tx-Power: %s  Link Quality: %s/%s\n",
 523                 print_txpower(iw, ifname),
 524                 print_quality(iw, ifname),
 525                 print_quality_max(iw, ifname));
 526         printf("          Signal: %s  Noise: %s\n",
 527                 print_signal(iw, ifname),
 528                 print_noise(iw, ifname));
 529         printf("          Bit Rate: %s\n",
 530                 print_rate(iw, ifname));
 531         printf("          Encryption: %s\n",
 532                 print_encryption(iw, ifname));
 533         printf("          Type: %s  HW Mode(s): %s\n",
 534                 print_type(iw, ifname),
 535                 print_hwmodes(iw, ifname));
 536         printf("          Hardware: %s [%s]\n",
 537                 print_hardware_id(iw, ifname),
 538                 print_hardware_name(iw, ifname));
 539         printf("          TX power offset: %s\n",
 540                 print_txpower_offset(iw, ifname));
 541         printf("          Frequency offset: %s\n",
 542                 print_frequency_offset(iw, ifname));
 543         printf("          Supports VAPs: %s\n",
 544                 print_mbssid_supp(iw, ifname));
 545 }
 546
 547
 548 static void print_scanlist(const struct iwinfo_ops *iw, const char *ifname)
 549 {
 550         int i, x, len;
 551         char buf[IWINFO_BUFSIZE];
 552         struct iwinfo_scanlist_entry *e;
 553
 554         if (iw->scanlist(ifname, buf, &len))
 555         {
 556                 printf("Scanning not possible\n\n");
 557                 return;
 558         }
 559         else if (len <= 0)
 560         {
 561                 printf("No scan results\n\n");
 562                 return;
 563         }
 564
 565         for (i = 0, x = 1; i < len; i += sizeof(struct iwinfo_scanlist_entry), x++)
 566         {
 567                 e = (struct iwinfo_scanlist_entry *) &buf[i];
 568
 569                 printf("Cell %02d - Address: %s\n",
 570                         x,
 571                         format_bssid(e->mac));
 572                 printf("          ESSID: %s\n",
 573                         format_ssid(e->ssid));
 574                 printf("          Mode: %s  Channel: %s\n",
 575                         e->mode ? (char *)e->mode : "unknown",
 576                         format_channel(e->channel));
 577                 printf("          Signal: %s  Quality: %s/%s\n",
 578                         format_signal(e->signal - 0x100),
 579                         format_quality(e->quality),
 580                         format_quality_max(e->quality_max));
 581                 printf("          Encryption: %s\n\n",
 582                         format_encryption(&e->crypto));
 583         }
 584 }
 585
 586
 587 static void print_txpwrlist(const struct iwinfo_ops *iw, const char *ifname)
 588 {
 589         int len, pwr, off, i;
 590         char buf[IWINFO_BUFSIZE];
 591         struct iwinfo_txpwrlist_entry *e;
 592
 593         if (iw->txpwrlist(ifname, buf, &len) || len <= 0)
 594         {
 595                 printf("No TX power information available\n");
 596                 return;
 597         }
 598
 599         if (iw->txpower(ifname, &pwr))
 600                 pwr = -1;
 601
 602         if (iw->txpower_offset(ifname, &off))
 603                 off = 0;
 604
 605         for (i = 0; i < len; i += sizeof(struct iwinfo_txpwrlist_entry))
 606         {
 607                 e = (struct iwinfo_txpwrlist_entry *) &buf[i];
 608
 609                 printf("%s%3d dBm (%4d mW)\n",
 610                         (pwr == e->dbm) ? "*" : " ",
 611                         e->dbm + off,
 612                         iwinfo_dbm2mw(e->dbm + off));
 613         }
 614 }
 615
 616
 617 static void print_freqlist(const struct iwinfo_ops *iw, const char *ifname)
 618 {
 619         int i, len, ch;
 620         char buf[IWINFO_BUFSIZE];
 621         struct iwinfo_freqlist_entry *e;
 622
 623         if (iw->freqlist(ifname, buf, &len) || len <= 0)
 624         {
 625                 printf("No frequency information available\n");
 626                 return;
 627         }
 628
 629         if (iw->channel(ifname, &ch))
 630                 ch = -1;
 631
 632         for (i = 0; i < len; i += sizeof(struct iwinfo_freqlist_entry))
 633         {
 634                 e = (struct iwinfo_freqlist_entry *) &buf[i];
 635
 636                 printf("%s %s (Channel %s)%s\n",
 637                         (ch == e->channel) ? "*" : " ",
 638                         format_frequency(e->mhz),
 639                         format_channel(e->channel),
 640                         e->restricted ? " [restricted]" : "");
 641         }
 642 }
 643
 644
 645 static void print_assoclist(const struct iwinfo_ops *iw, const char *ifname)
 646 {
 647         int i, len;
 648         char buf[IWINFO_BUFSIZE];
 649         struct iwinfo_assoclist_entry *e;
 650
 651         if (iw->assoclist(ifname, buf, &len))
 652         {
 653                 printf("No information available\n");
 654                 return;
 655         }
 656         else if (len <= 0)
 657         {
 658                 printf("No station connected\n");
 659                 return;
 660         }
 661
 662         for (i = 0; i < len; i += sizeof(struct iwinfo_assoclist_entry))
 663         {
 664                 e = (struct iwinfo_assoclist_entry *) &buf[i];
 665
 666                 printf("%s  %s / %s (SNR %d)  %d ms ago\n",
 667                         format_bssid(e->mac),
 668                         format_signal(e->signal),
 669                         format_noise(e->noise),
 670                         (e->signal - e->noise),
 671                         e->inactive);
 672
 673                 printf("        RX: %-38s  %8d Pkts.\n",
 674                         format_assocrate(&e->rx_rate),
 675                         e->rx_packets
 676                 );
 677
 678                 printf("        TX: %-38s  %8d Pkts.\n\n",
 679                         format_assocrate(&e->tx_rate),
 680                         e->tx_packets
 681                 );
 682         }
 683 }
 684
 685
 686 static char * lookup_country(char *buf, int len, int iso3166)
 687 {
 688         int i;
 689         struct iwinfo_country_entry *c;
 690
 691         for (i = 0; i < len; i += sizeof(struct iwinfo_country_entry))
 692         {
 693                 c = (struct iwinfo_country_entry *) &buf[i];
 694
 695                 if (c->iso3166 == iso3166)
 696                         return c->ccode;
 697         }
 698
 699         return NULL;
 700 }
 701
 702 static void print_countrylist(const struct iwinfo_ops *iw, const char *ifname)
 703 {
 704         int len;
 705         char buf[IWINFO_BUFSIZE];
 706         char *ccode;
 707         char curcode[3];
 708         const struct iwinfo_iso3166_label *l;
 709
 710         if (iw->countrylist(ifname, buf, &len))
 711         {
 712                 printf("No country code information available\n");
 713                 return;
 714         }
 715
 716         if (iw->country(ifname, curcode))
 717                 memset(curcode, 0, sizeof(curcode));
 718
 719         for (l = IWINFO_ISO3166_NAMES; l->iso3166; l++)
 720         {
 721                 if ((ccode = lookup_country(buf, len, l->iso3166)) != NULL)
 722                 {
 723                         printf("%s %4s  %c%c\n",
 724                                 strncmp(ccode, curcode, 2) ? " " : "*",
 725                                 ccode, (l->iso3166 / 256), (l->iso3166 % 256));
 726                 }
 727         }
 728 }
 729
 730
 731 int main(int argc, char **argv)
 732 {
 733         int i;
 734         const struct iwinfo_ops *iw;
 735
 736         if (argc < 3)
 737         {
 738                 fprintf(stderr,
 739                         "Usage:\n"
 740                         "       iwinfo <device> info\n"
 741                         "       iwinfo <device> scan\n"
 742                         "       iwinfo <device> txpowerlist\n"
 743                         "       iwinfo <device> freqlist\n"
 744                         "       iwinfo <device> assoclist\n"
 745                         "       iwinfo <device> countrylist\n"
 746                 );
 747
 748                 return 1;
 749         }
 750
 751         iw = iwinfo_backend(argv[1]);
 752
 753         if (!iw)
 754         {
 755                 fprintf(stderr, "No such wireless device: %s\n", argv[1]);
 756                 return 1;
 757         }
 758
 759         for (i = 2; i < argc; i++)
 760         {
 761                 switch(argv[i][0])
 762                 {
 763                 case 'i':
 764                         print_info(iw, argv[1]);
 765                         break;
 766
 767                 case 's':
 768                         print_scanlist(iw, argv[1]);
 769                         break;
 770
 771                 case 't':
 772                         print_txpwrlist(iw, argv[1]);
 773                         break;
 774
 775                 case 'f':
 776                         print_freqlist(iw, argv[1]);
 777                         break;
 778
 779                 case 'a':
 780                         print_assoclist(iw, argv[1]);
 781                         break;
 782
 783                 case 'c':
 784                         print_countrylist(iw, argv[1]);
 785                         break;
 786
 787                 default:
 788                         fprintf(stderr, "Unknown command: %s\n", argv[i]);
 789                         return 1;
 790                 }
 791         }
 792
 793         iwinfo_finish();
 794
 795         return 0;
 796 }