Mirror of the official iwinfo project repository by OpenWrt https://git.openwrt.org/project/iwinfo
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/*
* 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"
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 inline int wext_freq2mhz(const struct iw_freq *in)
{
if( in->e == 6 )
{
return in->m;
}
else
{
return (int)(wext_freq2float(in) / 1000000);
}
}
static inline int wext_ioctl(const char *ifname, int cmd, struct iwreq *wrq)
{
if( !strncmp(ifname, "mon.", 4) )
strncpy(wrq->ifr_name, &ifname[4], IFNAMSIZ);
else
strncpy(wrq->ifr_name, ifname, IFNAMSIZ);
return iwinfo_ioctl(cmd, wrq);
}
static int wext_probe(const char *ifname)
{
struct iwreq wrq;
if(wext_ioctl(ifname, SIOCGIWNAME, &wrq) >= 0)
return 1;
return 0;
}
static void wext_close(void)
{
/* Nop */
}
static int wext_get_mode(const char *ifname, int *buf)
{
struct iwreq wrq;
if(wext_ioctl(ifname, SIOCGIWMODE, &wrq) >= 0)
{
switch(wrq.u.mode)
{
case 1:
*buf = IWINFO_OPMODE_ADHOC;
break;
case 2:
*buf = IWINFO_OPMODE_CLIENT;
break;
case 3:
*buf = IWINFO_OPMODE_MASTER;
break;
case 6:
*buf = IWINFO_OPMODE_MONITOR;
break;
default:
*buf = IWINFO_OPMODE_UNKNOWN;
break;
}
return 0;
}
return -1;
}
static 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;
}
static 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;
}
static 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;
}
static 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) &range;
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;
}
static int wext_get_center_chan1(const char *ifname, int *buf)
{
/* Not Supported */
return -1;
}
static int wext_get_center_chan2(const char *ifname, int *buf)
{
/* Not Supported */
return -1;
}
static 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) &range;
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;
}
static 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 = iwinfo_mw2dbm(wrq.u.txpower.value);
else
*buf = wrq.u.txpower.value;
return 0;
}
return -1;
}
static 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;
}
static 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;
}
static 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;
}
static int wext_get_quality_max(const char *ifname, int *buf)
{
struct iwreq wrq;
struct iw_range range;
wrq.u.data.pointer = (caddr_t) &range;
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;
}
static int wext_get_assoclist(const char *ifname, char *buf, int *len)
{
/* Stub */
return -1;
}
static 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) &range;
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_MWATT )
{
entry.dbm = iwinfo_mw2dbm(range.txpower[i]);
entry.mw = range.txpower[i];
}
/* Madwifi does neither set mW not dBm caps, also iwlist assumes
* dBm if mW is not set, so don't check here... */
else /* if( range.txpower_capa & IW_TXPOW_DBM ) */
{
entry.dbm = range.txpower[i];
entry.mw = iwinfo_dbm2mw(range.txpower[i]);
}
memcpy(&buf[i*sizeof(entry)], &entry, sizeof(entry));
}
*len = i * sizeof(entry);
return 0;
}
return -1;
}
static 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) &range;
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;
entry.restricted = 0;
memcpy(&buf[bl], &entry, sizeof(struct iwinfo_freqlist_entry));
bl += sizeof(struct iwinfo_freqlist_entry);
}
*len = bl;
return 0;
}
return -1;
}
static int wext_get_country(const char *ifname, char *buf)
{
sprintf(buf, "00");
return 0;
}
static int wext_get_countrylist(const char *ifname, char *buf, int *len)
{
/* Stub */
return -1;
}
static int wext_get_hwmodelist(const char *ifname, int *buf)
{
char chans[IWINFO_BUFSIZE] = { 0 };
struct iwinfo_freqlist_entry *e = NULL;
int len = 0;
*buf = 0;
if( !wext_get_freqlist(ifname, chans, &len) )
{
for( e = (struct iwinfo_freqlist_entry *)chans; e->channel; e++ )
{
if( e->channel <= 14 )
{
*buf |= IWINFO_80211_B;
*buf |= IWINFO_80211_G;
}
else
{
*buf |= IWINFO_80211_A;
}
}
return 0;
}
return -1;
}
static int wext_get_htmodelist(const char *ifname, int *buf)
{
/* Stub */
return -1;
}
static int wext_get_encryption(const char *ifname, char *buf)
{
/* No reliable crypto info in wext */
return -1;
}
static int wext_get_phyname(const char *ifname, char *buf)
{
/* No suitable api in wext */
strcpy(buf, ifname);
return 0;
}
static int wext_get_mbssid_support(const char *ifname, int *buf)
{
/* No multi bssid support atm */
return -1;
}
static char * wext_sysfs_ifname_file(const char *ifname, const char *path)
{
FILE *f;
static char buf[128];
char *rv = NULL;
snprintf(buf, sizeof(buf), "/sys/class/net/%s/%s", ifname, path);
if ((f = fopen(buf, "r")) != NULL)
{
memset(buf, 0, sizeof(buf));
if (fread(buf, 1, sizeof(buf), f))
rv = buf;
fclose(f);
}
return rv;
}
static int wext_get_hardware_id(const char *ifname, char *buf)
{
char *data;
struct iwinfo_hardware_id *id = (struct iwinfo_hardware_id *)buf;
memset(id, 0, sizeof(struct iwinfo_hardware_id));
data = wext_sysfs_ifname_file(ifname, "device/vendor");
if (data)
id->vendor_id = strtoul(data, NULL, 16);
data = wext_sysfs_ifname_file(ifname, "device/device");
if (data)
id->device_id = strtoul(data, NULL, 16);
data = wext_sysfs_ifname_file(ifname, "device/subsystem_device");
if (data)
id->subsystem_device_id = strtoul(data, NULL, 16);
data = wext_sysfs_ifname_file(ifname, "device/subsystem_vendor");
if (data)
id->subsystem_vendor_id = strtoul(data, NULL, 16);
return (id->vendor_id > 0 && id->device_id > 0) ? 0 : -1;
}
static int wext_get_hardware_name(const char *ifname, char *buf)
{
sprintf(buf, "Generic WEXT");
return 0;
}
static int wext_get_txpower_offset(const char *ifname, int *buf)
{
/* Stub */
*buf = 0;
return -1;
}
static int wext_get_frequency_offset(const char *ifname, int *buf)
{
/* Stub */
*buf = 0;
return -1;
}
const struct iwinfo_ops wext_ops = {
.name = "wext",
.probe = wext_probe,
.channel = wext_get_channel,
.center_chan1 = wext_get_center_chan1,
.center_chan2 = wext_get_center_chan2,
.frequency = wext_get_frequency,
.frequency_offset = wext_get_frequency_offset,
.txpower = wext_get_txpower,
.txpower_offset = wext_get_txpower_offset,
.bitrate = wext_get_bitrate,
.signal = wext_get_signal,
.noise = wext_get_noise,
.quality = wext_get_quality,
.quality_max = wext_get_quality_max,
.mbssid_support = wext_get_mbssid_support,
.hwmodelist = wext_get_hwmodelist,
.htmodelist = wext_get_htmodelist,
.mode = wext_get_mode,
.ssid = wext_get_ssid,
.bssid = wext_get_bssid,
.country = wext_get_country,
.hardware_id = wext_get_hardware_id,
.hardware_name = wext_get_hardware_name,
.encryption = wext_get_encryption,
.phyname = wext_get_phyname,
.assoclist = wext_get_assoclist,
.txpwrlist = wext_get_txpwrlist,
.scanlist = wext_get_scanlist,
.freqlist = wext_get_freqlist,
.countrylist = wext_get_countrylist,
.close = wext_close
};