Allows a WLAN driver to signal current noise level:
# iw eth1 link
Connected to 00:13:19:80:da:30 (on eth1)
SSID: SSID
freq: 2437
RX: 424 bytes (5 packets)
TX: 0 bytes (0 packets)
signal: -49 dBm
noise: -93 dBm
tx bitrate: 11.0 MBit/s
Signed-off-by: Holger Schurig <hs4233@xxxxxxxxxxxxxxxxxxxx>
---
NOTE: I didn't find out how to modify wext-compat.c so
that "iwconfig" would also display the noise.
--- linux-wl.orig/include/linux/nl80211.h
+++ linux-wl/include/linux/nl80211.h
@@ -871,6 +871,8 @@
* @NL80211_STA_INFO_RX_PACKETS: total received packet (u32, from this station)
* @NL80211_STA_INFO_TX_PACKETS: total transmitted packets (u32, to this
* station)
+ * @NL80211_STA_INFO_NOISE: noise level (u8, dBm) (used in station mode for
+ * "iw link")
*/
enum nl80211_sta_info {
__NL80211_STA_INFO_INVALID,
@@ -884,6 +886,7 @@
NL80211_STA_INFO_TX_BITRATE,
NL80211_STA_INFO_RX_PACKETS,
NL80211_STA_INFO_TX_PACKETS,
+ NL80211_STA_INFO_NOISE,
/* keep last */
__NL80211_STA_INFO_AFTER_LAST,
--- linux-wl.orig/include/net/cfg80211.h
+++ linux-wl/include/net/cfg80211.h
@@ -309,6 +309,7 @@
* (tx_bitrate, tx_bitrate_flags and tx_bitrate_mcs)
* @STATION_INFO_RX_PACKETS: @rx_packets filled
* @STATION_INFO_TX_PACKETS: @tx_packets filled
+ * @STATION_INFO_NOISE: @noise filled
*/
enum station_info_flags {
STATION_INFO_INACTIVE_TIME = 1<<0,
@@ -321,6 +322,7 @@
STATION_INFO_TX_BITRATE = 1<<7,
STATION_INFO_RX_PACKETS = 1<<8,
STATION_INFO_TX_PACKETS = 1<<9,
+ STATION_INFO_NOISE = 1<<10,
};
/**
@@ -367,6 +369,7 @@
* @plid: mesh peer link id
* @plink_state: mesh peer link state
* @signal: signal strength of last received packet in dBm
+ * @noise: noise level in dBm
* @txrate: current unicast bitrate to this station
* @rx_packets: packets received from this station
* @tx_packets: packets transmitted to this station
@@ -384,6 +387,7 @@
u16 plid;
u8 plink_state;
s8 signal;
+ s8 noise;
struct rate_info txrate;
u32 rx_packets;
u32 tx_packets;
--- linux-wl.orig/net/wireless/nl80211.c
+++ linux-wl/net/wireless/nl80211.c
@@ -1636,6 +1636,9 @@
if (sinfo->filled & STATION_INFO_SIGNAL)
NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
sinfo->signal);
+ if (sinfo->filled & STATION_INFO_NOISE)
+ NLA_PUT_U8(msg, NL80211_STA_INFO_NOISE,
+ sinfo->noise);
if (sinfo->filled & STATION_INFO_TX_BITRATE) {
txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
if (!txrate)
--
http://www.holgerschurig.de
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