[ltp] R40 + ipw2100 + WEP 256

[Alejandro Bonilla]

1. 256 is not supported. Yes downgrade to either 128 or 64 bit.
2. the crc32 module is also required. modprobe crc32 arc4

Claudio Ferronato wrote:

> 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