--- /dev/null
+/*
+ * iwinfo - Wireless Information Library - Linux Wireless Extension 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/.
+ *
+ * Parts of this code are derived from the Linux wireless tools, iwlib.c,
+ * iwlist.c and iwconfig.c in particular.
+ */
+
+#include "iwinfo.h"
+#include "iwinfo_wext.h"
+
+#define LOG10_MAGIC 1.25892541179
+
+static int ioctl_socket = -1;
+
+static double wext_freq2float(const struct iw_freq *in)
+{
+ int i;
+ double res = (double) in->m;
+ for(i = 0; i < in->e; i++) res *= 10;
+ return res;
+}
+
+static int wext_freq2mhz(const struct iw_freq *in)
+{
+ int i, mhz;
+
+ if( in->e == 6 )
+ {
+ return in->m;
+ }
+ else
+ {
+ mhz = in->m;
+ for(i = 0; i < in->e; i++)
+ mhz *= 10;
+
+ return (int)(mhz / 100000);
+ }
+}
+
+int wext_dbm2mw(int in)
+{
+ double res = 1.0;
+ int ip = in / 10;
+ int fp = in % 10;
+ int k;
+
+ for(k = 0; k < ip; k++) res *= 10;
+ for(k = 0; k < fp; k++) res *= LOG10_MAGIC;
+
+ return (int)res;
+}
+
+int wext_mw2dbm(int in)
+{
+ double fin = (double) in;
+ int res = 0;
+
+ while(fin > 10.0)
+ {
+ res += 10;
+ fin /= 10.0;
+ }
+
+ while(fin > 1.000001)
+ {
+ res += 1;
+ fin /= LOG10_MAGIC;
+ }
+
+ return (int)res;
+}
+
+static int wext_ioctl(const char *ifname, int cmd, struct iwreq *wrq)
+{
+ /* prepare socket */
+ if( ioctl_socket == -1 )
+ ioctl_socket = socket(AF_INET, SOCK_DGRAM, 0);
+
+ if( !strncmp(ifname, "mon.", 4) )
+ strncpy(wrq->ifr_name, &ifname[4], IFNAMSIZ);
+ else
+ strncpy(wrq->ifr_name, ifname, IFNAMSIZ);
+
+ return ioctl(ioctl_socket, cmd, wrq);
+}
+
+
+int wext_probe(const char *ifname)
+{
+ struct iwreq wrq;
+
+ if(wext_ioctl(ifname, SIOCGIWNAME, &wrq) >= 0)
+ return 1;
+
+ return 0;
+}
+
+int wext_get_mode(const char *ifname, char *buf)
+{
+ struct iwreq wrq;
+
+ if(wext_ioctl(ifname, SIOCGIWMODE, &wrq) >= 0)
+ {
+ switch(wrq.u.mode)
+ {
+ case 0:
+ sprintf(buf, "Auto");
+ break;
+
+ case 1:
+ sprintf(buf, "Ad-Hoc");
+ break;
+
+ case 2:
+ sprintf(buf, "Client");
+ break;
+
+ case 3:
+ sprintf(buf, "Master");
+ break;
+
+ case 4:
+ sprintf(buf, "Repeater");
+ break;
+
+ case 5:
+ sprintf(buf, "Secondary");
+ break;
+
+ case 6:
+ sprintf(buf, "Monitor");
+ break;
+
+ default:
+ sprintf(buf, "Unknown");
+ }
+
+ return 0;
+ }
+
+ return -1;
+}
+
+int wext_get_ssid(const char *ifname, char *buf)
+{
+ struct iwreq wrq;
+
+ wrq.u.essid.pointer = (caddr_t) buf;
+ wrq.u.essid.length = IW_ESSID_MAX_SIZE + 1;
+ wrq.u.essid.flags = 0;
+
+ if(wext_ioctl(ifname, SIOCGIWESSID, &wrq) >= 0)
+ return 0;
+
+ return -1;
+}
+
+int wext_get_bssid(const char *ifname, char *buf)
+{
+ struct iwreq wrq;
+
+ if(wext_ioctl(ifname, SIOCGIWAP, &wrq) >= 0)
+ {
+ sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
+ (uint8_t)wrq.u.ap_addr.sa_data[0], (uint8_t)wrq.u.ap_addr.sa_data[1],
+ (uint8_t)wrq.u.ap_addr.sa_data[2], (uint8_t)wrq.u.ap_addr.sa_data[3],
+ (uint8_t)wrq.u.ap_addr.sa_data[4], (uint8_t)wrq.u.ap_addr.sa_data[5]);
+
+ return 0;
+ }
+
+ return -1;
+}
+
+int wext_get_bitrate(const char *ifname, int *buf)
+{
+ struct iwreq wrq;
+
+ if(wext_ioctl(ifname, SIOCGIWRATE, &wrq) >= 0)
+ {
+ *buf = (wrq.u.bitrate.value / 1000);
+ return 0;
+ }
+
+ return -1;
+}
+
+int wext_get_channel(const char *ifname, int *buf)
+{
+ struct iwreq wrq;
+ struct iw_range range;
+ double freq;
+ int i;
+
+ if(wext_ioctl(ifname, SIOCGIWFREQ, &wrq) >= 0)
+ {
+ if( wrq.u.freq.m >= 1000 )
+ {
+ freq = wext_freq2float(&wrq.u.freq);
+ wrq.u.data.pointer = (caddr_t) ⦥
+ wrq.u.data.length = sizeof(struct iw_range);
+ wrq.u.data.flags = 0;
+
+ if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
+ {
+ for(i = 0; i < range.num_frequency; i++)
+ {
+ if( wext_freq2float(&range.freq[i]) == freq )
+ {
+ *buf = range.freq[i].i;
+ return 0;
+ }
+ }
+ }
+ }
+ else
+ {
+ *buf = wrq.u.freq.m;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+int wext_get_frequency(const char *ifname, int *buf)
+{
+ struct iwreq wrq;
+ struct iw_range range;
+ int i, channel;
+
+ if(wext_ioctl(ifname, SIOCGIWFREQ, &wrq) >= 0)
+ {
+ /* We got a channel number instead ... */
+ if( wrq.u.freq.m < 1000 )
+ {
+ channel = wrq.u.freq.m;
+ wrq.u.data.pointer = (caddr_t) ⦥
+ wrq.u.data.length = sizeof(struct iw_range);
+ wrq.u.data.flags = 0;
+
+ if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
+ {
+ for(i = 0; i < range.num_frequency; i++)
+ {
+ if( range.freq[i].i == channel )
+ {
+ *buf = wext_freq2mhz(&range.freq[i]);
+ return 0;
+ }
+ }
+ }
+ }
+ else
+ {
+ *buf = wext_freq2mhz(&wrq.u.freq);
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+int wext_get_txpower(const char *ifname, int *buf)
+{
+ struct iwreq wrq;
+
+ wrq.u.txpower.flags = 0;
+
+ if(wext_ioctl(ifname, SIOCGIWTXPOW, &wrq) >= 0)
+ {
+ if(wrq.u.txpower.flags & IW_TXPOW_MWATT)
+ *buf = wext_mw2dbm(wrq.u.txpower.value);
+ else
+ *buf = wrq.u.txpower.value;
+
+ return 0;
+ }
+
+ return -1;
+}
+
+int wext_get_signal(const char *ifname, int *buf)
+{
+ struct iwreq wrq;
+ struct iw_statistics stats;
+
+ wrq.u.data.pointer = (caddr_t) &stats;
+ wrq.u.data.length = sizeof(struct iw_statistics);
+ wrq.u.data.flags = 1;
+
+ if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
+ {
+ *buf = (stats.qual.updated & IW_QUAL_DBM)
+ ? (stats.qual.level - 0x100) : stats.qual.level;
+
+ return 0;
+ }
+
+ return -1;
+}
+
+int wext_get_noise(const char *ifname, int *buf)
+{
+ struct iwreq wrq;
+ struct iw_statistics stats;
+
+ wrq.u.data.pointer = (caddr_t) &stats;
+ wrq.u.data.length = sizeof(struct iw_statistics);
+ wrq.u.data.flags = 1;
+
+ if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
+ {
+ *buf = (stats.qual.updated & IW_QUAL_DBM)
+ ? (stats.qual.noise - 0x100) : stats.qual.noise;
+
+ return 0;
+ }
+
+ return -1;
+}
+
+int wext_get_quality(const char *ifname, int *buf)
+{
+ struct iwreq wrq;
+ struct iw_statistics stats;
+
+ wrq.u.data.pointer = (caddr_t) &stats;
+ wrq.u.data.length = sizeof(struct iw_statistics);
+ wrq.u.data.flags = 1;
+
+ if(wext_ioctl(ifname, SIOCGIWSTATS, &wrq) >= 0)
+ {
+ *buf = stats.qual.qual;
+ return 0;
+ }
+
+ return -1;
+}
+
+int wext_get_quality_max(const char *ifname, int *buf)
+{
+ struct iwreq wrq;
+ struct iw_range range;
+
+ wrq.u.data.pointer = (caddr_t) ⦥
+ wrq.u.data.length = sizeof(struct iw_range);
+ wrq.u.data.flags = 0;
+
+ if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
+ {
+ *buf = range.max_qual.qual;
+ return 0;
+ }
+
+ return -1;
+}
+
+int wext_get_assoclist(const char *ifname, char *buf, int *len)
+{
+ /* Stub */
+ return -1;
+}
+
+int wext_get_txpwrlist(const char *ifname, char *buf, int *len)
+{
+ struct iwreq wrq;
+ struct iw_range range;
+ struct iwinfo_txpwrlist_entry entry;
+ int i;
+
+ wrq.u.data.pointer = (caddr_t) ⦥
+ wrq.u.data.length = sizeof(struct iw_range);
+ wrq.u.data.flags = 0;
+
+ if( (wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0) &&
+ (range.num_txpower > 0) && (range.num_txpower <= IW_MAX_TXPOWER) &&
+ !(range.txpower_capa & IW_TXPOW_RELATIVE)
+ ) {
+ for( i = 0; i < range.num_txpower; i++ )
+ {
+ if( range.txpower_capa & IW_TXPOW_DBM )
+ {
+ entry.dbm = range.txpower[i];
+ entry.mw = wext_dbm2mw(range.txpower[i]);
+ }
+
+ else if( range.txpower_capa & IW_TXPOW_MWATT )
+ {
+ entry.dbm = wext_mw2dbm(range.txpower[i]);
+ entry.mw = range.txpower[i];
+ }
+
+ memcpy(&buf[i*sizeof(entry)], &entry, sizeof(entry));
+ }
+
+ *len = i * sizeof(entry);
+ return 0;
+ }
+
+ return -1;
+}
+
+int wext_get_freqlist(const char *ifname, char *buf, int *len)
+{
+ struct iwreq wrq;
+ struct iw_range range;
+ struct iwinfo_freqlist_entry entry;
+ int i, bl;
+
+ wrq.u.data.pointer = (caddr_t) ⦥
+ wrq.u.data.length = sizeof(struct iw_range);
+ wrq.u.data.flags = 0;
+
+ if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
+ {
+ bl = 0;
+
+ for(i = 0; i < range.num_frequency; i++)
+ {
+ entry.mhz = wext_freq2mhz(&range.freq[i]);
+ entry.channel = range.freq[i].i;
+
+ memcpy(&buf[bl], &entry, sizeof(struct iwinfo_freqlist_entry));
+ bl += sizeof(struct iwinfo_freqlist_entry);
+ }
+
+ *len = bl;
+ return 0;
+ }
+
+ return -1;
+}
+
+int wext_get_encryption(const char *ifname, char *buf)
+{
+ /* No reliable crypto info in wext */
+ return -1;
+}
+
+int wext_get_mbssid_support(const char *ifname, int *buf)
+{
+ /* No multi bssid support atm */
+ return -1;
+}
+
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