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 static 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 static 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 )
92 ioctl_socket = socket(AF_INET, SOCK_DGRAM, 0);
94 strncpy(wrq->ifr_name, ifname, IFNAMSIZ);
95 return ioctl(ioctl_socket, cmd, wrq);
99 int wext_probe(const char *ifname)
103 if(wext_ioctl(ifname, SIOCGIWNAME, &wrq) >= 0)
109 int wext_get_mode(const char *ifname, char *buf)
113 if(wext_ioctl(ifname, SIOCGIWMODE, &wrq) >= 0)
118 sprintf(buf, "Auto");
122 sprintf(buf, "Ad-Hoc");
126 sprintf(buf, "Client");
130 sprintf(buf, "Master");
134 sprintf(buf, "Repeater");
138 sprintf(buf, "Secondary");
142 sprintf(buf, "Monitor");
146 sprintf(buf, "Unknown");
155 int wext_get_ssid(const char *ifname, char *buf)
159 wrq.u.essid.pointer = (caddr_t) buf;
160 wrq.u.essid.length = IW_ESSID_MAX_SIZE + 1;
161 wrq.u.essid.flags = 0;
163 if(wext_ioctl(ifname, SIOCGIWESSID, &wrq) >= 0)
169 int wext_get_bssid(const char *ifname, char *buf)
173 if(wext_ioctl(ifname, SIOCGIWAP, &wrq) >= 0)
175 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
176 (uint8_t)wrq.u.ap_addr.sa_data[0], (uint8_t)wrq.u.ap_addr.sa_data[1],
177 (uint8_t)wrq.u.ap_addr.sa_data[2], (uint8_t)wrq.u.ap_addr.sa_data[3],
178 (uint8_t)wrq.u.ap_addr.sa_data[4], (uint8_t)wrq.u.ap_addr.sa_data[5]);
186 int wext_get_bitrate(const char *ifname, int *buf)
190 if(wext_ioctl(ifname, SIOCGIWRATE, &wrq) >= 0)
192 *buf = (wrq.u.bitrate.value / 1000);
199 int wext_get_channel(const char *ifname, int *buf)
202 struct iw_range range;
206 if(wext_ioctl(ifname, SIOCGIWFREQ, &wrq) >= 0)
208 if( wrq.u.freq.m >= 1000 )
210 freq = wext_freq2float(&wrq.u.freq);
211 wrq.u.data.pointer = (caddr_t) ⦥
212 wrq.u.data.length = sizeof(struct iw_range);
213 wrq.u.data.flags = 0;
215 if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
217 for(i = 0; i < range.num_frequency; i++)
219 if( wext_freq2float(&range.freq[i]) == freq )
221 *buf = range.freq[i].i;
237 int wext_get_frequency(const char *ifname, int *buf)
240 struct iw_range range;
243 if(wext_ioctl(ifname, SIOCGIWFREQ, &wrq) >= 0)
245 /* We got a channel number instead ... */
246 if( wrq.u.freq.m < 1000 )
248 channel = wrq.u.freq.m;
249 wrq.u.data.pointer = (caddr_t) ⦥
250 wrq.u.data.length = sizeof(struct iw_range);
251 wrq.u.data.flags = 0;
253 if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
255 for(i = 0; i < range.num_frequency; i++)
257 if( range.freq[i].i == channel )
259 *buf = wext_freq2mhz(&range.freq[i]);
267 *buf = wext_freq2mhz(&wrq.u.freq);
275 int wext_get_signal(const char *ifname, int *buf)
278 struct iw_statistics stats;
280 wrq.u.data.pointer = (caddr_t) &stats;
281 wrq.u.data.length = sizeof(struct iw_statistics);
282 wrq.u.data.flags = 1;
284 if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
286 *buf = (stats.qual.level - 0x100);
293 int wext_get_noise(const char *ifname, int *buf)
296 struct iw_statistics stats;
298 wrq.u.data.pointer = (caddr_t) &stats;
299 wrq.u.data.length = sizeof(struct iw_statistics);
300 wrq.u.data.flags = 1;
302 if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
304 *buf = (stats.qual.noise - 0x100);
311 int wext_get_quality(const char *ifname, int *buf)
314 struct iw_statistics stats;
316 wrq.u.data.pointer = (caddr_t) &stats;
317 wrq.u.data.length = sizeof(struct iw_statistics);
318 wrq.u.data.flags = 1;
320 if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
322 *buf = stats.qual.qual;
329 int wext_get_quality_max(const char *ifname, int *buf)
332 struct iw_range range;
334 wrq.u.data.pointer = (caddr_t) ⦥
335 wrq.u.data.length = sizeof(struct iw_range);
336 wrq.u.data.flags = 0;
338 if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
340 *buf = range.max_qual.qual;
347 int wext_get_enctype(const char *ifname, char *buf)
353 int wext_get_assoclist(const char *ifname, char *buf, int *len)
359 int wext_get_txpwrlist(const char *ifname, char *buf, int *len)
362 struct iw_range range;
363 struct iwinfo_txpwrlist_entry entry;
366 wrq.u.data.pointer = (caddr_t) ⦥
367 wrq.u.data.length = sizeof(struct iw_range);
368 wrq.u.data.flags = 0;
370 if( (wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0) &&
371 (range.num_txpower > 0) && (range.num_txpower <= IW_MAX_TXPOWER) &&
372 !(range.txpower_capa & IW_TXPOW_RELATIVE)
374 for( i = 0; i < range.num_txpower; i++ )
376 if( range.txpower_capa & IW_TXPOW_DBM )
378 entry.dbm = range.txpower[i];
379 entry.mw = wext_dbm2mw(range.txpower[i]);
382 else if( range.txpower_capa & IW_TXPOW_MWATT )
384 entry.dbm = wext_mw2dbm(range.txpower[i]);
385 entry.mw = range.txpower[i];
388 memcpy(&buf[i*sizeof(entry)], &entry, sizeof(entry));
391 *len = i * sizeof(entry);
398 int wext_get_freqlist(const char *ifname, char *buf, int *len)
401 struct iw_range range;
402 struct iwinfo_freqlist_entry entry;
405 wrq.u.data.pointer = (caddr_t) ⦥
406 wrq.u.data.length = sizeof(struct iw_range);
407 wrq.u.data.flags = 0;
409 if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
413 for(i = 0; i < range.num_frequency; i++)
415 entry.mhz = wext_freq2mhz(&range.freq[i]);
416 entry.channel = range.freq[i].i;
418 memcpy(&buf[bl], &entry, sizeof(struct iwinfo_freqlist_entry));
419 bl += sizeof(struct iwinfo_freqlist_entry);
429 int wext_get_mbssid_support(const char *ifname, int *buf)
431 /* No multi bssid support atm */