[ltp] R40 + ipw2100 + WEP 256

[Claudio Ferronato]

Hi
I'm an owner of a beautiful (?!?) Thinkpad R40 (2722 BDG).
The wifi device is a centrino, which uses the driver ipw2100, found on 
ipw2100.sf.net . The kernel is 2.6.10 without any patch, and i compiled 
the driver as external, whith CONFIG_IPW2100_LEGACY_FW_LOAD set to "Y".
The firmware is in /etc/firmware, and all is good without encryption.
But when i try to use WEP, there is no connection.
The AP is an US-Robotics, with just a key of 256 bit, and the other wifi 
device (on a windows 98) works well.

This is my script to load the device:

rmmod ipw2100 arc4 ieee80211_crypt_wep ieee80211 ieee80211_crypt
/sbin/modprobe ipw2100 channel=6 mode=1
/usr/sbin/iwpriv eth1 set_power 5
/usr/sbin/iwconfig eth1 key restricted s:fa(see_something_else_ok_?)5d
ifconfig eth1 192.168.137.12 netmask 255.255.255.0 up
ping -c 1 -I eth1 192.168.137.1

Obliusvly, the key is obfuscated :)

iwconfig shows me this:

eth1      unassociated  ESSID:off/any  Nickname:"ipw2100"
           Mode:Ad-Hoc  Channel:6  Cell: 00:00:00:00:00:00
           Bit Rate=0kb/s   Tx-Power:off
           Retry:on   RTS thr:off   Fragment thr:off
           Encryption key:6634-BUT_-DO_Y-OU_P-ERSI-ST_?-30   Security 
mode:restricted
           Power Management:on
           Link Quality:0  Signal level:0  Noise level:0
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:0  Invalid misc:0   Missed beacon:0


But when I try to ping 192.168.137.1, i have just this message:

PING 192.168.137.1 (192.168.137.1) from 192.168.137.12 eth1: 56(84) 
bytes of data.
 From 192.168.137.12 icmp_seq=1 Destination Host Unreachable

--- 192.168.137.1 ping statistics ---
1 packets transmitted, 0 received, +1 errors, 100% packet loss, time 0ms


The routing table shouldn't have mistake

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
192.168.137.0   *               255.255.255.0   U     0      0        0 eth0
192.168.137.0   *               255.255.255.0   U     0      0        0 eth1
loopback        *               255.0.0.0       U     0      0        0 lo
default         usrobotics.wifi 0.0.0.0         UG    1      0        0 eth0

The WEP key is right, and eth0 has 192.168.137.11.

Should I downsize the key to 128 or 64 bit?

Claudio Ferronato