11. WIFI

11.1 Configurer ma carte wifi bcm4312, broadcom

#commandes utiles 
iwconfig
ifconfig
ifconfig wlan0 up
lspci | grep -i network
lsmod # voir les modules charges
lshw -C network

% wicd
wicd should be configured with the right interface name for the wifi!!! it does find it and activate it otherwise.

#Pour kernel  2.6.32 (what I've done with 2.6.32-4 and 5)
(-install firmware-b43 ... maybe useless?)
- install source from broadcom-b43
- go to /usr/src/modules/broadcom-sta/i380
Puis a partir des sources de broadcom :
make          (cree wl.ko)
make install  (le met dans /lib/modules/2.6.32-XXX/kernel/drivers/net/wireless/)
depmod        (pour que wl soit reconnu)

- Ensuite!!! L'important est la sequence dans laquelle les modules se chargent:
tout deloader : rmmod b43 b44 wl ssb
Puis dans l'ordre :
modprobe wl
modprobe ssb
modprobe b44

Un depmod -a  ne doit pas faire de mal pour generer les dependances entre modules

S'il faut appliquer des blaklists, cela signifie qu'il faut surement refaire un iniramfs
update-initramfs -u

En effet, b44 peut etre chargé dans l'initramfs. Ca se verifie en tappant:
gunzip -c /boot/initrd.img-$(uname -r) | cpio --list | grep b44

#pour kernel superieur a 2.6.30
http://wiki.debian.org/wl#Squeeze
http://forums.debian.net/viewtopic.php?f=16&t=30648&sid=20ba5ccea3f4a09829421b08a694b069&start=120
http://www.archlinux.it/wiki/index.php?title=Broadcom_BCM4312
sudo aptitude install broadcom-sta-sources
puis aller dans le repertoire /usr/share/doc/broadcom-sta-source/
et lire le readme

/etc/modprobe.d/broadcom-sta-common.conf
# original contents was the line immediately below
# install wl /sbin/modprobe -qr b43 ssb; /sbin/modprobe --ignore-install wl $CMDLINE_OPTS
install wl /sbin/modprobe -qr b44 ssb; /sbin/modprobe --ignore-install wl $CMDLINE_OPTS

My best guess, was that the reason my wifi isn't working that it's related to the module ssb. I can not keep the module from being loaded and I can not remove the module. After reading some about blacklisting http://wiki.debian.org/KernelModuleBlacklisting I saw that I was not entering 'blacklist ssb' in the correct file and I followed the instruction the the URL. I had previously noticed that there was some dependency of b44 on ssb and I couldn't remove ssb until b44 was out of the way. I decided to (I don't really know why) look at /etc/modprobe.d/broadcom-sta-common.conf and noticed the removal of b43 module instead of b44 module. So when I changed 'b43' to 'b44' I then had wifi. As noted in a previous post, b44 is my wired ethernet.

The only thing that might be a concern, is that my wireless device is named eth1 instead of wlan0. Not that it really matters but in keeping convention, my wireless should be wlanX not ethX.

ou

sudo aptitude install broadcom-sta-modules-2.6.30-1-686
puis
blacklister (/etc/modprobe.d/blacklist.d ) b43 b44 ssb
les virer
rmmod b43;  rmmod b44;  rmmod ssb; 
Enfin, ajouter wl et peut-etre lib80211_crypt_tkip dans /etc/modules

Sinon, patcer soi meme les fichiers wl_linux.c et wl_linux.h lors de la compilation du driver wl.ko (voir plus bas)
 afin de ne pas utiliser ieee80211 mais lib80211

#Pour kernel < 2.6.30
De la balle !!!!!!! :
Utiliser les drivers broadcom :
http://www.broadcom.com/support/802.11/linux_sta.php
Utiliser le patch si besoin(kernel >2.6.28)
Le module ieee80211_crypt_tkip a change de nom, maintenant c'est lib80211_crypt_tkip
donc, faire : 
modprobe lib80211_crypt_tkip
puis
insmod wl.ko

Article explicatif :
http://jomcode.com/fadhil/?p=59
J'ai sauve le fichier tar dans mon Config

    tar -xvzf hybrid-portsrc-x86_32_5_10_27_6.tar.gz
    
    make -C /lib/modules/`uname -r`/build M=`pwd`

Of course, you need to make sure you have all the required kernel headers before building it.
Once that's done, your directory listing should look like this:

    built-in.o
    hybrid-portsrc-x86_32_5_10_27_6.tar.gz
    lib
    Makefile
    modules.order
    Module.symvers
    src
    wl.ko
    wl.mod.c
    wl.mod.o
    wl.o

The magic file we need is wl.ko. Make sure you don't have b43, b43legacy or b43xx loaded by running this:

    rmmod bcm43xx; rmmod b43; rmmod b43legacy

And for good measure remove ndiswrapper modules:

    rmmod ndiswrapper

Now load the module ieee80211_crypt_tkip:

    modprobe ieee80211_crypt_tkip

And finally load the wl.ko module:

    insmod wl.ko

Now if you do an ifconfig, you should see wlan0 right after your eth0 and lo devices. Y
ippee-kay-yay! Test it out by scanning and connecting to a network.
If it works, then you might want your module to load upon boot, which is something the Broadcom readme doesn't touch on.
Let me school you how.

Copy the wl.ko file to /lib/modules/2.6.26-1-686/kernel/net/wireless/

    cp wl.ko /lib/modules/2.6.26-1-686/kernel/net/wireless/

Create the module dependencies:

    depmod -a

Try loading your new module!:

    modprobe wl

If you get no error on modprobe, then it worked perfectly! Next you have to tell your system to load the module at startup.
On my debian system, I do this by editing the file /etc/modules to include the following:

    ieee80211_crypt_tkip
    wl

Now, reboot and you've got official Broadcom wifi goodness!

11.2 Cracker wifi WEP

% 
% La suite aircrack-ng comprend plusieurs programmes dont les 3 principaux sont
% * airodump-ng, le logiciel de capture de paquets, c'est lui qui scan les réseaux et conserve les paquets qui serviront à décrypter la clef.
% * aireplay-ng, un logiciel dont la principale fonction est l'envois de paquets dans le but de stimuler le reseau et capturer plus de paquets.
% * aircrack-ng, le logiciel de crack de clef, c'est un logiciel qui à partir des informations capturées à l'aide d'airodump va nous donner la clef (si biensur on en a un nombre suffisant).
% 
% 
% 
% 
% 
% http://www.cdc.informatik.tu-darmstadt.de/aircrack-ptw/
% 
% Aircrack-ptw
% Our tool is quite similar to aircrack-ng.
% Tutotrial aircrack-ng : http://www.aircrack-ng.org/doku.php?id=simple_wep_crack
% For ptw :
%     * In Step 3, you MUST NOT use the parameter -ivs. Just skip this parameter, the other command line arguments still apply.
%     * In Step 5, you should use aircrack-ptw instead of aircrack-ng. ls -la output*.cap will give you a list of capture files airodump-ng has created. Usually, if you did not interrupt airodump-ng, there should be only one file named output-01.cap. Just start aircrack-ptw output-01.cap to get the key. If aircrack-ptw was not successfull, wait a few seconds and start it again.
% 
% 
% Aircrack-ng :
% sudo aptitude install build-essential
% sudo aptitude install libssl-dev libsqlite3-dev
% ?sqlite
% 
% apt-get install libpcap0.8-dev.
% 
%

11.3 Monitor mode for wifi usb key : TL-WN321G chipset Ralink rt73

http://aircrack-ng.org/doku.php?id=rt73

wget http://homepages.tu-darmstadt.de/~p_larbig/wlan/rt73-k2wrlz-3.0.3.tar.bz2
tar -xjf rt73-k2wrlz-3.0.3.tar.bz2
cd rt73-k2wrlz-3.0.3/Module
make

then, as root, type

make install
modprobe rt73

Conseil perso :
rechercher dans /lib/modules/2.6.30/ les fichiers rt73*
Deplacer les modules rt2x00 (rt73usb,rt2500 etc) dans un dossier (/root/rt-old par exemple)
Recreer les dependances module :
depmod -ae
et redemarrer

Activer le mode monitor a la main :

iwconfig rausb0 mode monitor

Ou avec airmon-ng

 ifconfig rausb0 up
 airmon-ng start rausb0
 

La commande iwpriv donne acces ou "fonctions" de l'interface
iwpriv raus0

Emmanuel Branlard
http://emmanuel.branlard.free.fr/