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<DIV><FONT face=Arial size=2>I noticed a mismatch on the values of signal and
silence in /proc/net/hostap/<if>/<client_mac> and the values
listed by the iwlist <if> scan when working on master mode. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>This is what i get from
/proc/net/hostap/<if>/<client_mac>:</FONT></DIV>
<DIV><FONT face=Arial size=2>...</FONT></DIV>
<DIV><FONT face=Arial size=2>buffer_count=0<BR>last_rx: silence=165 signal=173
rate=20<BR>tx_rate=110</FONT></DIV>
<DIV><FONT face=Arial size=2>...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>signal and silence are ok. signal = 173 -
256 = -83dBm and silence = 165 - 256 = -91dBm which seem very
normal.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>...and this is what i get from iwlist <if>
scan:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial
size=2> Cell 01 -
Address: XX:XX:XX:XX:XX:XX</FONT></DIV>
<DIV><FONT face=Arial
size=2>
Mode:Managed<BR>
Quality:229/92 Signal level:-32 dBm Noise level:-34 dBm</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Examining the code, i noticed that the values
in the /proc/net/hostap/<if>/<client_mac> are in dBm, previously
converted with HFA384X_RSSI_LEVEL_TO_dBm. But when they are retreived
in order to get passed to wireless tools, they get converted again
with HFA384X_LEVEL_TO_dBm. This is a bug because the values are already in
dBm and they are mistakenly treated as if they were in the range 27-154. The
same exists in quality update procedure so it must affect iwspy too. I
attach a patch i made which fixes the problem with signal and noise levels. I
also rewrote the link quality algorithmn to work with dBm values when
scanning for associated clients. I've tested the patch on 1.7.4 and 1.3.6 F/W. I
don't know if it works for 1.8.x. The card is a Netgear
MA311.</FONT></DIV></BODY></HTML>