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Topic: anyone knows how to scan wireless signal?

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toufu

Group: Members
Posts: 14
Joined: Aug. 2006

Posted: Jan. 07 2008,06:10

the USB adapter works fine at windows 2000. It can scan nearby wireless access points. But scanning dones't work in DSL.

^thehatsrule^ Offline

Group: Members
Posts: 3275
Joined: July 2006

Posted: Jan. 07 2008,15:34

Quote

Function not implemented

would probably imply the driver doesn't support it. You could try seeing if there's updated drivers, (or even use ndiswrapper - if this is absolutely required)?

Juanito

Group: Members
Posts: 1601
Joined: Sep. 2005

Posted: Jan. 08 2008,14:33

Quote

You could try seeing if there's updated drivers, (or even use ndiswrapper - if this is absolutely required)?

- I'm not so sure you can do this with ndiswrapper. I've always had the problem that I need to know the ssid or ssid and wep code before I load ndiswrapper or otherwise it will not load.

If ndiswrapper has not loaded/connected then things will not work:

Code Sample

$ sudo /usr/local/bin/ndiswrapper.sh /mnt/sda1/ndiswrapper/bcmwl5a.inf wlan0 ssid 2>&1 >/dev/null
Operation failed
$ iwlist wlan0 scanning
wlan0 No scan results [even though a network is present]

Juanito

Group: Members
Posts: 1601
Joined: Sep. 2005

Posted: Jan. 10 2008,06:55

...but if ndiswrapper does connect then everything seems to work fine:

Code Sample

$ sudo /opt/myndis.sh
$ iwlist wlan0 scanning
Warning: Driver for device wlan0 recommend version 18 of Wireless Extension,
but has been compiled with version 16, therefore some driver features
may not be available...
wlan0 Scan completed :
Cell 01 - Address: 00:12:17:71:0F:5C
ESSID:"juanito"
Protocol:IEEE 802.11b
Mode:Managed
Frequency:2.437GHz
Quality:0/100 Signal level:-56 dBm Noise level:-256 dBm
Encryption key:on
Bit Rate:1Mb/s
Bit Rate:2Mb/s
Bit Rate:5.5Mb/s
Bit Rate:6Mb/s
Bit Rate:9Mb/s
Bit Rate:11Mb/s
Bit Rate:12Mb/s
Bit Rate:18Mb/s
Bit Rate:24Mb/s
Bit Rate:36Mb/s
Bit Rate:48Mb/s
Bit Rate:54Mb/s
Extra:bcn_int=100
Extra:atim=0

- maybe dsl-3.4.8 could be updated to version 18 of the wireless extensions (I think 28 or 29 is current now)?

lucky13

Group: Members
Posts: 1478
Joined: Feb. 2007

Posted: Jan. 10 2008,16:30

Quote

maybe dsl-3.4.8 could be updated to version 18...

And maybe DSL-4.2.4?

Quote

(I think 28 or 29 is current now)

Current is 29 but no support for 2.4 kernel beyond patches for 17 and 18.
http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html

Patch quick links:
v17: for kernel 2.4.29. Export driver event capacities, allow large scan requests and various minor fixes.
http://www.hpl.hp.com/persona....13.diff

v18: for kernel 2.4.30. WPA support, from Jouni Malinen. You will need WT-27-pre25 or later.
http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/iw240_we18-5.diff

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15 replies since Jan. 01 2008,19:32

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