+/*
+ * iwinfo - Wireless Information Library - Madwifi Backend
+ *
+ * Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
+ *
+ * The iwinfo library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * The iwinfo library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with the iwinfo library. If not, see http://www.gnu.org/licenses/.
+ *
+ * The signal handling code is derived from the official madwifi tools,
+ * wlanconfig.c in particular. The encryption property handling was
+ * inspired by the hostapd madwifi driver.
+ */
+
+#include "iwinfo_madwifi.h"
+#include "iwinfo_wext.h"
+
+static int ioctl_socket = -1;
+
+static int madwifi_ioctl(struct iwreq *wrq, const char *ifname, int cmd, void *data, size_t len)
+{
+ /* prepare socket */
+ if( ioctl_socket == -1 )
+ ioctl_socket = socket(AF_INET, SOCK_DGRAM, 0);
+
+ strncpy(wrq->ifr_name, ifname, IFNAMSIZ);
+
+ if( data != NULL )
+ {
+ if( len < IFNAMSIZ )
+ {
+ memcpy(wrq->u.name, data, len);
+ }
+ else
+ {
+ wrq->u.data.pointer = data;
+ wrq->u.data.length = len;
+ }
+ }
+
+ return ioctl(ioctl_socket, cmd, wrq);
+}
+
+static int get80211priv(const char *ifname, int op, void *data, size_t len)
+{
+ struct iwreq iwr;
+
+ if( madwifi_ioctl(&iwr, ifname, op, data, len) < 0 )
+ return -1;
+
+ return iwr.u.data.length;
+}
+
+static int madwifi_isvap(const char *ifname, const char *wifiname)
+{
+ int fd, ret;
+ char path[32];
+ char name[IFNAMSIZ];
+
+ ret = 0;
+
+ if( strlen(ifname) <= 9 )
+ {
+ sprintf(path, "/proc/sys/net/%s/%%parent", ifname);
+
+ if( (fd = open(path, O_RDONLY)) > -1 )
+ {
+ if( wifiname != NULL )
+ {
+ if( read(fd, name, strlen(wifiname)) == strlen(wifiname) )
+ ret = strncmp(name, wifiname, strlen(wifiname)) ? 0 : 1;
+ }
+ else if( read(fd, name, 4) == 4 )
+ {
+ ret = strncmp(name, "wifi", 4) ? 0 : 1;
+ }
+
+ (void) close(fd);
+ }
+ }
+
+ return ret;
+}
+
+static int madwifi_iswifi(const char *ifname)
+{
+ int ret;
+ char path[32];
+ struct stat s;
+
+ ret = 0;
+
+ if( strlen(ifname) <= 7 )
+ {
+ sprintf(path, "/proc/sys/dev/%s/diversity", ifname);
+
+ if( ! stat(path, &s) )
+ ret = (s.st_mode & S_IFREG);
+ }
+
+ return ret;
+}
+
+
+int madwifi_probe(const char *ifname)
+{
+ return ( madwifi_isvap(ifname, NULL) || madwifi_iswifi(ifname) );
+}
+
+int madwifi_get_mode(const char *ifname, char *buf)
+{
+ return wext_get_mode(ifname, buf);
+}
+
+int madwifi_get_ssid(const char *ifname, char *buf)
+{
+ return wext_get_ssid(ifname, buf);
+}
+
+int madwifi_get_bssid(const char *ifname, char *buf)
+{
+ return wext_get_bssid(ifname, buf);
+}
+
+int madwifi_get_channel(const char *ifname, int *buf)
+{
+ int i;
+ uint16_t freq;
+ struct iwreq wrq;
+ struct ieee80211req_chaninfo chans;
+
+ if( madwifi_ioctl(&wrq, ifname, SIOCGIWFREQ, NULL, 0) >= 0 )
+ {
+ /* Madwifi returns a Hz frequency, get it's freq list to find channel index */
+ freq = (uint16_t)(wrq.u.freq.m / 100000);
+
+ if( get80211priv(ifname, IEEE80211_IOCTL_GETCHANINFO, &chans, sizeof(chans)) >= 0 )
+ {
+ *buf = 0;
+
+ for( i = 0; i < chans.ic_nchans; i++ )
+ {
+ if( freq == chans.ic_chans[i].ic_freq )
+ {
+ *buf = chans.ic_chans[i].ic_ieee;
+ break;
+ }
+ }
+
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+int madwifi_get_frequency(const char *ifname, int *buf)
+{
+ struct iwreq wrq;
+
+ if( madwifi_ioctl(&wrq, ifname, SIOCGIWFREQ, NULL, 0) >= 0 )
+ {
+ *buf = (uint16_t)(wrq.u.freq.m / 100000);
+ return 0;
+ }
+
+ return -1;
+}
+
+int madwifi_get_txpower(const char *ifname, int *buf)
+{
+ return wext_get_txpower(ifname, buf);
+}
+
+int madwifi_get_bitrate(const char *ifname, int *buf)
+{
+ unsigned int mode, len, rate, rate_count;
+ uint8_t tmp[24*1024];
+ uint8_t *cp;
+ struct iwreq wrq;
+ struct ieee80211req_sta_info *si;
+
+ if( madwifi_ioctl(&wrq, ifname, SIOCGIWMODE, NULL, 0) >= 0 )
+ {
+ mode = wrq.u.mode;
+
+ /* Calculate bitrate average from associated stations in ad-hoc mode */
+ if( mode == 1 )
+ {
+ rate = rate_count = 0;
+
+ if( (len = get80211priv(ifname, IEEE80211_IOCTL_STA_INFO, tmp, 24*1024)) > 0 )
+ {
+ cp = tmp;
+
+ do {
+ si = (struct ieee80211req_sta_info *) cp;
+
+ if( si->isi_rssi > 0 )
+ {
+ rate_count++;
+ rate += ((si->isi_rates[si->isi_txrate] & IEEE80211_RATE_VAL) / 2);
+ }
+
+ cp += si->isi_len;
+ len -= si->isi_len;
+ } while (len >= sizeof(struct ieee80211req_sta_info));
+ }
+
+ *buf = (rate == 0 || rate_count == 0) ? 0 : (rate / rate_count) * 1000;
+ return 0;
+ }
+
+ /* Return whatever wext tells us ... */
+ return wext_get_bitrate(ifname, buf);
+ }
+
+ return -1;
+}
+
+int madwifi_get_signal(const char *ifname, int *buf)
+{
+ unsigned int mode, len, rssi, rssi_count;
+ uint8_t tmp[24*1024];
+ uint8_t *cp;
+ struct iwreq wrq;
+ struct ieee80211req_sta_info *si;
+
+ if( madwifi_ioctl(&wrq, ifname, SIOCGIWMODE, NULL, 0) >= 0 )
+ {
+ mode = wrq.u.mode;
+
+ /* Calculate signal average from associated stations in ap or ad-hoc mode */
+ if( mode == 1 )
+ {
+ rssi = rssi_count = 0;
+
+ if( (len = get80211priv(ifname, IEEE80211_IOCTL_STA_INFO, tmp, 24*1024)) > 0 )
+ {
+ cp = tmp;
+
+ do {
+ si = (struct ieee80211req_sta_info *) cp;
+
+ if( si->isi_rssi > 0 )
+ {
+ rssi_count++;
+ rssi -= (si->isi_rssi - 95);
+ }
+
+ cp += si->isi_len;
+ len -= si->isi_len;
+ } while (len >= sizeof(struct ieee80211req_sta_info));
+ }
+
+ *buf = (rssi == 0 || rssi_count == 0) ? 1 : -(rssi / rssi_count);
+ return 0;
+ }
+
+ /* Return whatever wext tells us ... */
+ return wext_get_signal(ifname, buf);
+ }
+
+ return -1;
+}
+
+int madwifi_get_noise(const char *ifname, int *buf)
+{
+ return wext_get_noise(ifname, buf);
+}
+
+int madwifi_get_quality(const char *ifname, int *buf)
+{
+ unsigned int mode, len, quality, quality_count;
+ uint8_t tmp[24*1024];
+ uint8_t *cp;
+ struct iwreq wrq;
+ struct ieee80211req_sta_info *si;
+
+ if( madwifi_ioctl(&wrq, ifname, SIOCGIWMODE, NULL, 0) >= 0 )
+ {
+ mode = wrq.u.mode;
+
+ /* Calculate signal average from associated stations in ad-hoc mode */
+ if( mode == 1 )
+ {
+ quality = quality_count = 0;
+
+ if( (len = get80211priv(ifname, IEEE80211_IOCTL_STA_INFO, tmp, 24*1024)) > 0 )
+ {
+ cp = tmp;
+
+ do {
+ si = (struct ieee80211req_sta_info *) cp;
+
+ if( si->isi_rssi > 0 )
+ {
+ quality_count++;
+ quality += si->isi_rssi;
+ }
+
+ cp += si->isi_len;
+ len -= si->isi_len;
+ } while (len >= sizeof(struct ieee80211req_sta_info));
+ }
+
+ *buf = (quality == 0 || quality_count == 0) ? 0 : (quality / quality_count);
+ return 0;
+ }
+
+ /* Return whatever wext tells us ... */
+ return wext_get_quality(ifname, buf);
+ }
+
+ return -1;
+}
+
+int madwifi_get_quality_max(const char *ifname, int *buf)
+{
+ return wext_get_quality_max(ifname, buf);
+}
+
+int madwifi_get_encryption(const char *ifname, char *buf)
+{
+ int ciphers = 0, key_type = 0, key_len = 0;
+ struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
+ struct iwreq wrq;
+ struct ieee80211req_key wk;
+
+ memset(&wrq, 0, sizeof(wrq));
+ memset(&wk, 0, sizeof(wk));
+ memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
+
+ /* Get key information */
+ if( get80211priv(ifname, IEEE80211_IOCTL_GETKEY, &wk, sizeof(wk)) >= 0 )
+ {
+ key_type = wk.ik_type;
+
+ /* Type 0 == WEP */
+ if( key_type == 0 )
+ c->auth_algs = (IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED);
+ }
+
+ /* Get wpa protocol version */
+ wrq.u.mode = IEEE80211_PARAM_WPA;
+ if( madwifi_ioctl(&wrq, ifname, IEEE80211_IOCTL_GETPARAM, NULL, 0) >= 0 )
+ c->wpa_version = wrq.u.mode;
+
+ /* Get authentication suites */
+ wrq.u.mode = IEEE80211_PARAM_AUTHMODE;
+ if( madwifi_ioctl(&wrq, ifname, IEEE80211_IOCTL_GETPARAM, NULL, 0) >= 0 )
+ {
+ switch(wrq.u.mode) {
+ case IEEE80211_AUTH_8021X:
+ c->auth_suites |= IWINFO_KMGMT_8021x;
+ break;
+
+ case IEEE80211_AUTH_WPA:
+ c->auth_suites |= IWINFO_KMGMT_PSK;
+ break;
+
+ default:
+ c->auth_suites |= IWINFO_KMGMT_NONE;
+ break;
+ }
+ }
+
+ /* Get group key length */
+ wrq.u.mode = IEEE80211_PARAM_MCASTKEYLEN;
+ if( madwifi_ioctl(&wrq, ifname, IEEE80211_IOCTL_GETPARAM, NULL, 0) >= 0 )
+ key_len = wrq.u.mode;
+
+ /* Get used pairwise ciphers */
+ wrq.u.mode = IEEE80211_PARAM_UCASTCIPHERS;
+ if( madwifi_ioctl(&wrq, ifname, IEEE80211_IOCTL_GETPARAM, NULL, 0) >= 0 )
+ {
+ ciphers = wrq.u.mode;
+
+ if( ciphers & (1 << IEEE80211_CIPHER_TKIP) )
+ c->pair_ciphers |= IWINFO_CIPHER_TKIP;
+
+ if( ciphers & (1 << IEEE80211_CIPHER_AES_CCM) )
+ c->pair_ciphers |= IWINFO_CIPHER_CCMP;
+
+ if( ciphers & (1 << IEEE80211_CIPHER_AES_OCB) )
+ c->pair_ciphers |= IWINFO_CIPHER_AESOCB;
+
+ if( ciphers & (1 << IEEE80211_CIPHER_CKIP) )
+ c->pair_ciphers |= IWINFO_CIPHER_CKIP;
+
+ if( ciphers & (1 << IEEE80211_CIPHER_WEP) )
+ {
+ switch(key_len) {
+ case 13:
+ c->pair_ciphers |= IWINFO_CIPHER_WEP104;
+ break;
+
+ case 5:
+ c->pair_ciphers |= IWINFO_CIPHER_WEP40;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if( ciphers & (1 << IEEE80211_CIPHER_NONE) )
+ c->pair_ciphers |= IWINFO_CIPHER_NONE;
+ }
+
+ /* Get used group cipher */
+ wrq.u.mode = IEEE80211_PARAM_MCASTCIPHER;
+ if( madwifi_ioctl(&wrq, ifname, IEEE80211_IOCTL_GETPARAM, NULL, 0) >= 0 )
+ {
+ ciphers = wrq.u.mode;
+
+ switch(wrq.u.mode) {
+ case IEEE80211_CIPHER_TKIP:
+ c->group_ciphers |= IWINFO_CIPHER_TKIP;
+ break;
+
+ case IEEE80211_CIPHER_AES_CCM:
+ c->group_ciphers |= IWINFO_CIPHER_CCMP;
+ break;
+
+ case IEEE80211_CIPHER_AES_OCB:
+ c->group_ciphers |= IWINFO_CIPHER_AESOCB;
+ break;
+
+ case IEEE80211_CIPHER_CKIP:
+ c->group_ciphers |= IWINFO_CIPHER_CKIP;
+ break;
+
+ case IEEE80211_CIPHER_WEP:
+ switch(key_len) {
+ case 13:
+ c->group_ciphers |= IWINFO_CIPHER_WEP104;
+ break;
+
+ case 5:
+ c->group_ciphers |= IWINFO_CIPHER_WEP40;
+ break;
+
+ default:
+ break;
+ }
+ break;
+
+ case IEEE80211_CIPHER_NONE:
+ c->group_ciphers |= IWINFO_CIPHER_NONE;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ c->enabled = (c->wpa_version || c->auth_algs) ? 1 : 0;
+
+ return 0;
+}
+
+int madwifi_get_assoclist(const char *ifname, char *buf, int *len)
+{
+ int bl, tl, noise;
+ uint8_t *cp;
+ uint8_t tmp[24*1024];
+ struct ieee80211req_sta_info *si;
+ struct iwinfo_assoclist_entry entry;
+
+ if( (tl = get80211priv(ifname, IEEE80211_IOCTL_STA_INFO, tmp, 24*1024)) > 0 )
+ {
+ cp = tmp;
+ bl = 0;
+
+ if( madwifi_get_noise(ifname, &noise) )
+ noise = 0;
+
+ do {
+ si = (struct ieee80211req_sta_info *) cp;
+
+ entry.signal = (si->isi_rssi - 95);
+ entry.noise = noise;
+ memcpy(entry.mac, &si->isi_macaddr, 6);
+ memcpy(&buf[bl], &entry, sizeof(struct iwinfo_assoclist_entry));
+
+ bl += sizeof(struct iwinfo_assoclist_entry);
+ cp += si->isi_len;
+ tl -= si->isi_len;
+ } while (tl >= sizeof(struct ieee80211req_sta_info));
+
+ *len = bl;
+ return 0;
+ }
+
+ return -1;
+}
+
+int madwifi_get_txpwrlist(const char *ifname, char *buf, int *len)
+{
+ int rc = -1;
+ char cmd[256];
+
+ /* A wifiX device? */
+ if( madwifi_iswifi(ifname) )
+ {
+ sprintf(cmd, "wlanconfig ath-txpwr create nounit "
+ "wlandev %s wlanmode ap >/dev/null", ifname);
+
+ if( ! WEXITSTATUS(system(cmd)) )
+ {
+ rc = wext_get_txpwrlist("ath-txpwr", buf, len);
+ (void) WEXITSTATUS(system("wlanconfig ath-txpwr destroy"));
+ }
+ }
+
+ /* Its an athX ... */
+ else if( madwifi_isvap(ifname, NULL) )
+ {
+ rc = wext_get_txpwrlist(ifname, buf, len);
+ }
+
+ return rc;
+}
+
+int madwifi_get_scanlist(const char *ifname, char *buf, int *len)
+{
+ int ret;
+ char cmd[256];
+ DIR *proc;
+ struct dirent *e;
+
+ ret = -1;
+
+ /* We got a wifiX device passed, try to lookup a vap on it */
+ if( madwifi_iswifi(ifname) )
+ {
+ if( (proc = opendir("/proc/sys/net/")) != NULL )
+ {
+ while( (e = readdir(proc)) != NULL )
+ {
+ if( madwifi_isvap(e->d_name, ifname) )
+ {
+ sprintf(cmd, "ifconfig %s up", e->d_name);
+
+ if( ! WEXITSTATUS(system(cmd)) )
+ {
+ ret = wext_get_scanlist(e->d_name, buf, len);
+ break;
+ }
+ }
+ }
+
+ closedir(proc);
+ }
+
+ /* Still nothing found, try to create a vap */
+ if( ret == -1 )
+ {
+ sprintf(cmd, "wlanconfig ath-scan create nounit "
+ "wlandev %s wlanmode sta >/dev/null", ifname);
+
+ if( ! WEXITSTATUS(system(cmd)) && ! WEXITSTATUS(system("ifconfig ath-scan up")) )
+ {
+ ret = wext_get_scanlist("ath-scan", buf, len);
+
+ (void) WEXITSTATUS(system("ifconfig ath-scan down"));
+ (void) WEXITSTATUS(system("wlanconfig ath-scan destroy"));
+ }
+ }
+ }
+
+ /* Got athX device? */
+ else if( madwifi_isvap(ifname, NULL) )
+ {
+ ret = wext_get_scanlist(ifname, buf, len);
+ }
+
+ return ret;
+}
+
+int madwifi_get_freqlist(const char *ifname, char *buf, int *len)
+{
+ int i, bl;
+ int rc = -1;
+ char cmd[256];
+ struct ieee80211req_chaninfo chans;
+ struct iwinfo_freqlist_entry entry;
+
+ /* A wifiX device? */
+ if( madwifi_iswifi(ifname) )
+ {
+ sprintf(cmd, "wlanconfig ath-channels create nounit "
+ "wlandev %s wlanmode ap >/dev/null", ifname);
+
+ if( ! WEXITSTATUS(system(cmd)) )
+ {
+ rc = get80211priv("ath-channels", IEEE80211_IOCTL_GETCHANINFO, &chans, sizeof(chans));
+ (void) WEXITSTATUS(system("wlanconfig ath-channels destroy"));
+ }
+ }
+
+ /* Its an athX ... */
+ else if( madwifi_isvap(ifname, NULL) )
+ {
+ rc = get80211priv(ifname, IEEE80211_IOCTL_GETCHANINFO, &chans, sizeof(chans));
+ }
+
+
+ /* Got chaninfo? */
+ if( rc >= 0 )
+ {
+ bl = 0;
+
+ for( i = 0; i < chans.ic_nchans; i++ )
+ {
+ entry.mhz = chans.ic_chans[i].ic_freq;
+ entry.channel = chans.ic_chans[i].ic_ieee;
+
+ memcpy(&buf[bl], &entry, sizeof(struct iwinfo_freqlist_entry));
+ bl += sizeof(struct iwinfo_freqlist_entry);
+ }
+
+ *len = bl;
+ return 0;
+ }
+
+ return -1;
+}
+
+int madwifi_get_mbssid_support(const char *ifname, int *buf)
+{
+ /* We assume that multi bssid is always possible */
+ *buf = 1;
+ return 0;
+}
+
projects / project / luci.git / blobdiff