2 * iwinfo - Wireless Information Library - Linux Wireless Extension Backend
4 * Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
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.
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.
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/.
18 * Parts of this code are derived from the Linux wireless tools, iwlib.c,
19 * iwlist.c and iwconfig.c in particular.
23 #include "iwinfo_wext.h"
25 #define LOG10_MAGIC 1.25892541179
27 static int ioctl_socket = -1;
29 static double wext_freq2float(const struct iw_freq *in)
32 double res = (double) in->m;
33 for(i = 0; i < in->e; i++) res *= 10;
37 static int wext_freq2mhz(const struct iw_freq *in)
48 for(i = 0; i < in->e; i++)
51 return (int)(mhz / 100000);
55 int wext_dbm2mw(int in)
62 for(k = 0; k < ip; k++) res *= 10;
63 for(k = 0; k < fp; k++) res *= LOG10_MAGIC;
68 int wext_mw2dbm(int in)
70 double fin = (double) in;
88 static int wext_ioctl(const char *ifname, int cmd, struct iwreq *wrq)
91 if( ioctl_socket == -1 )
93 ioctl_socket = socket(AF_INET, SOCK_DGRAM, 0);
94 fcntl(ioctl_socket, F_SETFD, fcntl(ioctl_socket, F_GETFD) | FD_CLOEXEC);
97 if( !strncmp(ifname, "mon.", 4) )
98 strncpy(wrq->ifr_name, &ifname[4], IFNAMSIZ);
100 strncpy(wrq->ifr_name, ifname, IFNAMSIZ);
102 return ioctl(ioctl_socket, cmd, wrq);
106 int wext_probe(const char *ifname)
110 if(wext_ioctl(ifname, SIOCGIWNAME, &wrq) >= 0)
116 int wext_get_mode(const char *ifname, char *buf)
120 if(wext_ioctl(ifname, SIOCGIWMODE, &wrq) >= 0)
125 sprintf(buf, "Auto");
129 sprintf(buf, "Ad-Hoc");
133 sprintf(buf, "Client");
137 sprintf(buf, "Master");
141 sprintf(buf, "Repeater");
145 sprintf(buf, "Secondary");
149 sprintf(buf, "Monitor");
153 sprintf(buf, "Unknown");
162 int wext_get_ssid(const char *ifname, char *buf)
166 wrq.u.essid.pointer = (caddr_t) buf;
167 wrq.u.essid.length = IW_ESSID_MAX_SIZE + 1;
168 wrq.u.essid.flags = 0;
170 if(wext_ioctl(ifname, SIOCGIWESSID, &wrq) >= 0)
176 int wext_get_bssid(const char *ifname, char *buf)
180 if(wext_ioctl(ifname, SIOCGIWAP, &wrq) >= 0)
182 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
183 (uint8_t)wrq.u.ap_addr.sa_data[0], (uint8_t)wrq.u.ap_addr.sa_data[1],
184 (uint8_t)wrq.u.ap_addr.sa_data[2], (uint8_t)wrq.u.ap_addr.sa_data[3],
185 (uint8_t)wrq.u.ap_addr.sa_data[4], (uint8_t)wrq.u.ap_addr.sa_data[5]);
193 int wext_get_bitrate(const char *ifname, int *buf)
197 if(wext_ioctl(ifname, SIOCGIWRATE, &wrq) >= 0)
199 *buf = (wrq.u.bitrate.value / 1000);
206 int wext_get_channel(const char *ifname, int *buf)
209 struct iw_range range;
213 if(wext_ioctl(ifname, SIOCGIWFREQ, &wrq) >= 0)
215 if( wrq.u.freq.m >= 1000 )
217 freq = wext_freq2float(&wrq.u.freq);
218 wrq.u.data.pointer = (caddr_t) ⦥
219 wrq.u.data.length = sizeof(struct iw_range);
220 wrq.u.data.flags = 0;
222 if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
224 for(i = 0; i < range.num_frequency; i++)
226 if( wext_freq2float(&range.freq[i]) == freq )
228 *buf = range.freq[i].i;
244 int wext_get_frequency(const char *ifname, int *buf)
247 struct iw_range range;
250 if(wext_ioctl(ifname, SIOCGIWFREQ, &wrq) >= 0)
252 /* We got a channel number instead ... */
253 if( wrq.u.freq.m < 1000 )
255 channel = wrq.u.freq.m;
256 wrq.u.data.pointer = (caddr_t) ⦥
257 wrq.u.data.length = sizeof(struct iw_range);
258 wrq.u.data.flags = 0;
260 if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
262 for(i = 0; i < range.num_frequency; i++)
264 if( range.freq[i].i == channel )
266 *buf = wext_freq2mhz(&range.freq[i]);
274 *buf = wext_freq2mhz(&wrq.u.freq);
282 int wext_get_txpower(const char *ifname, int *buf)
286 wrq.u.txpower.flags = 0;
288 if(wext_ioctl(ifname, SIOCGIWTXPOW, &wrq) >= 0)
290 if(wrq.u.txpower.flags & IW_TXPOW_MWATT)
291 *buf = wext_mw2dbm(wrq.u.txpower.value);
293 *buf = wrq.u.txpower.value;
301 int wext_get_signal(const char *ifname, int *buf)
304 struct iw_statistics stats;
306 wrq.u.data.pointer = (caddr_t) &stats;
307 wrq.u.data.length = sizeof(struct iw_statistics);
308 wrq.u.data.flags = 1;
310 if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
312 *buf = (stats.qual.updated & IW_QUAL_DBM)
313 ? (stats.qual.level - 0x100) : stats.qual.level;
321 int wext_get_noise(const char *ifname, int *buf)
324 struct iw_statistics stats;
326 wrq.u.data.pointer = (caddr_t) &stats;
327 wrq.u.data.length = sizeof(struct iw_statistics);
328 wrq.u.data.flags = 1;
330 if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
332 *buf = (stats.qual.updated & IW_QUAL_DBM)
333 ? (stats.qual.noise - 0x100) : stats.qual.noise;
341 int wext_get_quality(const char *ifname, int *buf)
344 struct iw_statistics stats;
346 wrq.u.data.pointer = (caddr_t) &stats;
347 wrq.u.data.length = sizeof(struct iw_statistics);
348 wrq.u.data.flags = 1;
350 if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
352 *buf = stats.qual.qual;
359 int wext_get_quality_max(const char *ifname, int *buf)
362 struct iw_range range;
364 wrq.u.data.pointer = (caddr_t) ⦥
365 wrq.u.data.length = sizeof(struct iw_range);
366 wrq.u.data.flags = 0;
368 if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
370 *buf = range.max_qual.qual;
377 int wext_get_assoclist(const char *ifname, char *buf, int *len)
383 int wext_get_txpwrlist(const char *ifname, char *buf, int *len)
386 struct iw_range range;
387 struct iwinfo_txpwrlist_entry entry;
390 wrq.u.data.pointer = (caddr_t) ⦥
391 wrq.u.data.length = sizeof(struct iw_range);
392 wrq.u.data.flags = 0;
394 if( (wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0) &&
395 (range.num_txpower > 0) && (range.num_txpower <= IW_MAX_TXPOWER) &&
396 !(range.txpower_capa & IW_TXPOW_RELATIVE)
398 for( i = 0; i < range.num_txpower; i++ )
400 if( range.txpower_capa & IW_TXPOW_DBM )
402 entry.dbm = range.txpower[i];
403 entry.mw = wext_dbm2mw(range.txpower[i]);
406 else if( range.txpower_capa & IW_TXPOW_MWATT )
408 entry.dbm = wext_mw2dbm(range.txpower[i]);
409 entry.mw = range.txpower[i];
412 memcpy(&buf[i*sizeof(entry)], &entry, sizeof(entry));
415 *len = i * sizeof(entry);
422 int wext_get_freqlist(const char *ifname, char *buf, int *len)
425 struct iw_range range;
426 struct iwinfo_freqlist_entry entry;
429 wrq.u.data.pointer = (caddr_t) ⦥
430 wrq.u.data.length = sizeof(struct iw_range);
431 wrq.u.data.flags = 0;
433 if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
437 for(i = 0; i < range.num_frequency; i++)
439 entry.mhz = wext_freq2mhz(&range.freq[i]);
440 entry.channel = range.freq[i].i;
442 memcpy(&buf[bl], &entry, sizeof(struct iwinfo_freqlist_entry));
443 bl += sizeof(struct iwinfo_freqlist_entry);
453 int wext_get_country(const char *ifname, char *buf)
459 int wext_get_countrylist(const char *ifname, char *buf, int *len)
465 int wext_get_encryption(const char *ifname, char *buf)
467 /* No reliable crypto info in wext */
471 int wext_get_mbssid_support(const char *ifname, int *buf)
473 /* No multi bssid support atm */