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Wifi (Linux): detect frequency & channel number

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This commit is contained in:
Carter Li 2024-11-22 10:31:12 +08:00
parent 06055cc6c3
commit 7000317841
1 changed files with 56 additions and 0 deletions
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56
src/detection/wifi/wifi_linux.c
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@ -43,6 +43,18 @@ typedef enum {
continue; \
}
static uint16_t freq2channel(uint16_t frequency)
{
// https://github.com/opetryna/win32wifi/blob/master/win32wifi/Win32Wifi.py#L140
// FIXME: Does it work for 6 GHz?
if (frequency == 2484)
return 14;
else if (frequency < 2484)
return (uint16_t) (frequency - 2407) / 5;
else
return (frequency / 5) - 1000;
}
static const char* detectWifiWithNm(FFWifiResult* item, FFstrbuf* buffer)
{
FFDBusData dbus;
@ -130,6 +142,19 @@ static const char* detectWifiWithNm(FFWifiResult* item, FFstrbuf* buffer)
item->conn.signalQuality = strengthPercent;
}
}
else if (ffStrEquals(key, "Frequency"))
{
if (item->conn.frequency == 0)
{
uint32_t frequency;
if (ffDBusGetUint(&dbus, &dictIterator, &frequency))
{
item->conn.frequency = (uint16_t) frequency;
if (item->conn.channel == 0)
item->conn.channel = freq2channel(item->conn.frequency);
}
}
}
else if ((ffStrEquals(key, "Flags") && ffDBusGetUint(&dbus, &dictIterator, &flags)) ||
(ffStrEquals(key, "WpaFlags") && ffDBusGetUint(&dbus, &dictIterator, &wpaFlags)) ||
(ffStrEquals(key, "RsnFlags") && ffDBusGetUint(&dbus, &dictIterator, &rsnFlags))
@ -224,6 +249,13 @@ static const char* detectWifiWithIw(FFWifiResult* item, FFstrbuf* buffer)
ffStrbufSetStatic(&item->conn.protocol, "802.11n (Wi-Fi 4)");
}
ffStrbufClear(buffer);
if(ffParsePropLines(output.chars, "freq: ", buffer))
{
item->conn.frequency = (uint16_t) ffStrbufToUInt(buffer, 0);
item->conn.channel = freq2channel(item->conn.frequency);
}
return NULL;
}
@ -269,6 +301,30 @@ static const char* detectWifiWithIoctls(FFWifiResult* item)
if(ioctl(sock, SIOCGIWRATE, &iwr) >= 0)
item->conn.txRate = iwr.u.bitrate.value / 1000000.;
if(ioctl(sock, SIOCGIWFREQ, &iwr) >= 0)
{
if (iwr.u.freq.e == 0 && iwr.u.freq.m <= 1000)
{
item->conn.channel = (uint16_t) iwr.u.freq.m;
}
else
{
// convert it to MHz
while (iwr.u.freq.e < 6)
{
iwr.u.freq.m /= 10;
iwr.u.freq.e++;
}
while (iwr.u.freq.e > 6)
{
iwr.u.freq.m *= 10;
iwr.u.freq.e--;
}
item->conn.frequency = (uint16_t) iwr.u.freq.m;
item->conn.channel = freq2channel(item->conn.frequency);
}
}
struct iw_statistics stats;
iwr.u.data.pointer = &stats;
iwr.u.data.length = sizeof(stats);