2 * iwinfo - Wireless Information Library - Madwifi 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 * The signal handling code is derived from the official madwifi tools,
19 * wlanconfig.c in particular. The encryption property handling was
20 * inspired by the hostapd madwifi driver.
23 #include "iwinfo_madwifi.h"
24 #include "iwinfo_wext.h"
26 static int ioctl_socket = -1;
28 static int madwifi_ioctl(struct iwreq *wrq, const char *ifname, int cmd, void *data, size_t len)
31 if( ioctl_socket == -1 )
32 ioctl_socket = socket(AF_INET, SOCK_DGRAM, 0);
34 strncpy(wrq->ifr_name, ifname, IFNAMSIZ);
40 memcpy(wrq->u.name, data, len);
44 wrq->u.data.pointer = data;
45 wrq->u.data.length = len;
49 return ioctl(ioctl_socket, cmd, wrq);
52 static int get80211priv(const char *ifname, int op, void *data, size_t len)
56 if( madwifi_ioctl(&iwr, ifname, op, data, len) < 0 )
59 return iwr.u.data.length;
63 int madwifi_probe(const char *ifname)
69 sprintf(path, "/proc/sys/net/%s/%%parent", ifname);
72 if( (fd = open(path, O_RDONLY)) > -1 )
74 if( read(fd, name, 4) == 4 )
75 ret = strncmp(name, "wifi", 4) ? 0 : 1;
83 int madwifi_get_mode(const char *ifname, char *buf)
85 return wext_get_mode(ifname, buf);
88 int madwifi_get_ssid(const char *ifname, char *buf)
90 return wext_get_ssid(ifname, buf);
93 int madwifi_get_bssid(const char *ifname, char *buf)
95 return wext_get_bssid(ifname, buf);
98 int madwifi_get_channel(const char *ifname, int *buf)
103 struct ieee80211req_chaninfo chans;
105 if( madwifi_ioctl(&wrq, ifname, SIOCGIWFREQ, NULL, 0) >= 0 )
107 /* Madwifi returns a Hz frequency, get it's freq list to find channel index */
108 freq = (uint16_t)(wrq.u.freq.m / 100000);
110 if( get80211priv(ifname, IEEE80211_IOCTL_GETCHANINFO, &chans, sizeof(chans)) >= 0 )
114 for( i = 0; i < chans.ic_nchans; i++ )
116 if( freq == chans.ic_chans[i].ic_freq )
118 *buf = chans.ic_chans[i].ic_ieee;
130 int madwifi_get_bitrate(const char *ifname, int *buf)
132 unsigned int mode, len, rate, rate_count;
133 uint8_t tmp[24*1024];
136 struct ieee80211req_sta_info *si;
138 if( madwifi_ioctl(&wrq, ifname, SIOCGIWMODE, NULL, 0) >= 0 )
142 /* Calculate bitrate average from associated stations in ad-hoc mode */
145 rate = rate_count = 0;
147 if( (len = get80211priv(ifname, IEEE80211_IOCTL_STA_INFO, tmp, 24*1024)) > 0 )
152 si = (struct ieee80211req_sta_info *) cp;
154 if( si->isi_rssi > 0 )
157 rate += ((si->isi_rates[si->isi_txrate] & IEEE80211_RATE_VAL) / 2);
162 } while (len >= sizeof(struct ieee80211req_sta_info));
165 *buf = (rate == 0 || rate_count == 0) ? 0 : (rate / rate_count);
169 /* Return whatever wext tells us ... */
170 return wext_get_bitrate(ifname, buf);
176 int madwifi_get_signal(const char *ifname, int *buf)
178 unsigned int mode, len, rssi, rssi_count;
179 uint8_t tmp[24*1024];
182 struct ieee80211req_sta_info *si;
184 if( madwifi_ioctl(&wrq, ifname, SIOCGIWMODE, NULL, 0) >= 0 )
188 /* Calculate signal average from associated stations in ap or ad-hoc mode */
191 rssi = rssi_count = 0;
193 if( (len = get80211priv(ifname, IEEE80211_IOCTL_STA_INFO, tmp, 24*1024)) > 0 )
198 si = (struct ieee80211req_sta_info *) cp;
200 if( si->isi_rssi > 0 )
203 rssi -= (si->isi_rssi - 95);
208 } while (len >= sizeof(struct ieee80211req_sta_info));
211 *buf = (rssi == 0 || rssi_count == 0) ? 1 : -(rssi / rssi_count);
215 /* Return whatever wext tells us ... */
216 return wext_get_signal(ifname, buf);
222 int madwifi_get_noise(const char *ifname, int *buf)
224 return wext_get_noise(ifname, buf);
227 int madwifi_get_quality(const char *ifname, int *buf)
229 unsigned int mode, len, quality, quality_count;
230 uint8_t tmp[24*1024];
233 struct ieee80211req_sta_info *si;
235 if( madwifi_ioctl(&wrq, ifname, SIOCGIWMODE, NULL, 0) >= 0 )
239 /* Calculate signal average from associated stations in ad-hoc mode */
242 quality = quality_count = 0;
244 if( (len = get80211priv(ifname, IEEE80211_IOCTL_STA_INFO, tmp, 24*1024)) > 0 )
249 si = (struct ieee80211req_sta_info *) cp;
251 if( si->isi_rssi > 0 )
254 quality += si->isi_rssi;
259 } while (len >= sizeof(struct ieee80211req_sta_info));
262 *buf = (quality == 0 || quality_count == 0) ? 0 : (quality / quality_count);
266 /* Return whatever wext tells us ... */
267 return wext_get_quality(ifname, buf);
273 int madwifi_get_quality_max(const char *ifname, int *buf)
275 return wext_get_quality_max(ifname, buf);
278 int madwifi_get_enctype(const char *ifname, char *buf)
281 struct ieee80211req_key wk;
282 int wpa_version = 0, ciphers = 0, key_type = 0;
283 char cipher_string[32];
285 sprintf(buf, "Unknown");
287 memset(&wrq, 0, sizeof(wrq));
288 memset(&wk, 0, sizeof(wk));
289 memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
291 /* Get key information */
292 if( get80211priv(ifname, IEEE80211_IOCTL_GETKEY, &wk, sizeof(wk)) >= 0 )
293 key_type = wk.ik_type;
295 /* Get wpa protocol version */
296 wrq.u.mode = IEEE80211_PARAM_WPA;
297 if( madwifi_ioctl(&wrq, ifname, IEEE80211_IOCTL_GETPARAM, NULL, 0) >= 0 )
298 wpa_version = wrq.u.mode;
300 /* Get used pairwise ciphers */
301 wrq.u.mode = IEEE80211_PARAM_UCASTCIPHERS;
302 if( madwifi_ioctl(&wrq, ifname, IEEE80211_IOCTL_GETPARAM, NULL, 0) >= 0 )
304 ciphers = wrq.u.mode;
306 if( wpa_version > 0 )
308 memset(cipher_string, 0, sizeof(cipher_string));
310 /* Looks like mixed wpa/wpa2 ? */
311 if( (ciphers & (1<<IEEE80211_CIPHER_TKIP)) && (ciphers & (1<<IEEE80211_CIPHER_AES_CCM)) )
315 if( (ciphers & (1<<IEEE80211_CIPHER_TKIP)) )
316 strcat(cipher_string, "TKIP, ");
318 if( (ciphers & (1<<IEEE80211_CIPHER_AES_CCM)) )
319 strcat(cipher_string, "CCMP, ");
321 if( (ciphers & (1<<IEEE80211_CIPHER_AES_OCB)) )
322 strcat(cipher_string, "AES-OCB, ");
324 if( (ciphers & (1<<IEEE80211_CIPHER_CKIP)) )
325 strcat(cipher_string, "CKIP, ");
327 cipher_string[strlen(cipher_string)-2] = 0;
333 sprintf(buf, "mixed WPA/WPA2 (%s)", cipher_string);
337 sprintf(buf, "WPA2 (%s)", cipher_string);
341 sprintf(buf, "WPA (%s)", cipher_string);
345 sprintf(buf, "%s", (key_type == 0) ? "WEP" : "None");
352 int madwifi_get_assoclist(const char *ifname, char *buf, int *len)
356 uint8_t tmp[24*1024];
357 struct ieee80211req_sta_info *si;
358 struct iwinfo_assoclist_entry entry;
360 if( (tl = get80211priv(ifname, IEEE80211_IOCTL_STA_INFO, tmp, 24*1024)) > 0 )
365 if( madwifi_get_noise(ifname, &noise) )
369 si = (struct ieee80211req_sta_info *) cp;
371 entry.signal = (si->isi_rssi - 95);
373 memcpy(entry.mac, &si->isi_macaddr, 6);
374 memcpy(&buf[bl], &entry, sizeof(struct iwinfo_assoclist_entry));
376 bl += sizeof(struct iwinfo_assoclist_entry);
379 } while (tl >= sizeof(struct ieee80211req_sta_info));