-/*
- * 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_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_enctype(const char *ifname, char *buf)
-{
- struct iwreq wrq;
- struct ieee80211req_key wk;
- int wpa_version = 0, ciphers = 0, key_type = 0;
- char cipher_string[32];
-
- sprintf(buf, "Unknown");
-
- 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;
-
- /* Get wpa protocol version */
- wrq.u.mode = IEEE80211_PARAM_WPA;
- if( madwifi_ioctl(&wrq, ifname, IEEE80211_IOCTL_GETPARAM, NULL, 0) >= 0 )
- wpa_version = 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( wpa_version > 0 )
- {
- memset(cipher_string, 0, sizeof(cipher_string));
-
- /* Looks like mixed wpa/wpa2 ? */
- if( (ciphers & (1<<IEEE80211_CIPHER_TKIP)) && (ciphers & (1<<IEEE80211_CIPHER_AES_CCM)) )
- wpa_version = 3;
-
-
- if( (ciphers & (1<<IEEE80211_CIPHER_TKIP)) )
- strcat(cipher_string, "TKIP, ");
-
- if( (ciphers & (1<<IEEE80211_CIPHER_AES_CCM)) )
- strcat(cipher_string, "CCMP, ");
-
- if( (ciphers & (1<<IEEE80211_CIPHER_AES_OCB)) )
- strcat(cipher_string, "AES-OCB, ");
-
- if( (ciphers & (1<<IEEE80211_CIPHER_CKIP)) )
- strcat(cipher_string, "CKIP, ");
-
- cipher_string[strlen(cipher_string)-2] = 0;
- }
-
- switch(wpa_version)
- {
- case 3:
- sprintf(buf, "mixed WPA/WPA2 (%s)", cipher_string);
- break;
-
- case 2:
- sprintf(buf, "WPA2 (%s)", cipher_string);
- break;
-
- case 1:
- sprintf(buf, "WPA (%s)", cipher_string);
- break;
-
- default:
- sprintf(buf, "%s", (key_type == 0) ? "WEP" : "None");
- }
- }
-
- 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;
-}
-
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