{{tag>Brouillon Réseau module}}

= 802.11 notes Wifi

Voir aussi :
* mdk3

Connexion à un réseau wifi
<code bash>
iwconfig wlan0 essid Livebox-ABCD key 0123456789ABCD
</code>

<code bash>
cat > /etc/apt/sources.list <<EOF
deb http://ftp.debian.org/debian jessie-backports main contrib non-free
EOF

apt-get update

apt-get install iw wireless-tools rfkill

#apt-get install firmware-ralink
apt-get install firmware-misc-nonfree

apt-get install firmware-atheros

rfkill list all

/etc/init.d/network-manager stop

ifconfig wlan0 up
iwlist wlan0 scan

iwconfig wlan0 essid FreeWifi

dhclient -r wlan0
dhclient wlan0

nmcli r wifi on

w3m https://wifi.free.fr
</code>

Diag
<code bash>
ifconfig
iw event -t -f
</code>

Option module

Source : 
* https://askubuntu.com/questions/440256/how-do-i-create-a-system-file-etc-modprobe-d-ath9k-conf
* https://doc.ubuntu-fr.org/wifi_atheros_ar9285

<code bash>
cat /sys/module/ath9k/parameters/nohwcrypt
sudo modprobe -r ath9k
sudo modprobe ath9k nohwcrypt=1
</code>

<code - /etc/modprobe.d/ath9k.conf>
options ath9k nohwcrypt=1
</code>


wicd pour remplacer le NetWork Manager 

<code bash>
sudo apt-get update && sudo apt-get install wicd
sudo systemctl restart wicd
wicd-client
</code>

== WPA

Voir :
* https://community.spiceworks.com/topic/2072178-wpa2-krack-attack-reviewing-the-basics?source=topic&pos=29

== Diag

<code bash>
rfkill list
#rfkill unblock 1
rfkill unblock all

iwlist scan
</code>


== Pb

=== Pb drivers - rtw_timed out to flush pci tx ring

Voir :
* https://linuxfr.org/forums/linux-embarque/posts/probleme-pour-charger-le-firmware-realtek-rtw88

<code bash>
dmesg -T
</code>

<code ->
[Fri Feb  9 16:16:23 2024] rtw_8821ce 0000:01:00.0: timed out to flush pci tx ring[1]
[Fri Feb  9 16:16:23 2024] rtw_8821ce 0000:01:00.0: timed out to flush pci tx ring[3]
[Fri Feb  9 16:16:23 2024] rtw_8821ce 0000:01:00.0: timed out to flush pci tx ring[5]
[Fri Feb  9 16:16:24 2024] rtw_8821ce 0000:01:00.0: timed out to flush pci tx ring[1]
[Fri Feb  9 16:16:24 2024] rtw_8821ce 0000:01:00.0: timed out to flush pci tx ring[3]
[Fri Feb  9 16:16:24 2024] rtw_8821ce 0000:01:00.0: timed out to flush pci tx ring[5]

...
[Fri Feb  9 16:26:39 2024] wlp1s0: authentication with a4:ce:da:1e:07:97 timed out
[Fri Feb  9 16:26:40 2024] wlp1s0: authenticate with a4:ce:da:1e:07:92
[Fri Feb  9 16:26:40 2024] wlp1s0: send auth to a4:ce:da:1e:07:92 (try 1/3)
[Fri Feb  9 16:26:41 2024] wlp1s0: send auth to a4:ce:da:1e:07:92 (try 2/3)
[Fri Feb  9 16:26:42 2024] wlp1s0: send auth to a4:ce:da:1e:07:92 (try 3/3)
[Fri Feb  9 16:26:43 2024] wlp1s0: authentication with a4:ce:da:1e:07:92 timed out
</code>


Solution provisoire 
<code bash>
modprobe -r rtw88_8821ce
modprobe rtw88_8821ce
</code>

A tester pour diag
<code bash>
rfkill list all
</code>

=== Pb drivers

<code ->
# dmesg
...
[   11.869171] iwlwifi 0000:00:14.3: firmware didn't ACK the reset - continue anyway
[   11.869317] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[   11.869369] iwlwifi 0000:00:14.3: Transport status: 0x0000004A, valid: 6
[   11.869411] iwlwifi 0000:00:14.3: Loaded firmware version: 72.daa05125.0 so-a0-jf-b0-72.ucode
[   11.869452] iwlwifi 0000:00:14.3: 0x00000084 | NMI_INTERRUPT_UNKNOWN       
[   11.869488] iwlwifi 0000:00:14.3: 0x000082F0 | trm_hw_status0
[   11.869517] iwlwifi 0000:00:14.3: 0x00000000 | trm_hw_status1
[   11.869545] iwlwifi 0000:00:14.3: 0x004D2466 | branchlink2
[   11.869576] iwlwifi 0000:00:14.3: 0x004C9122 | interruptlink1
[   11.869603] iwlwifi 0000:00:14.3: 0x004C9122 | interruptlink2
[   11.869632] iwlwifi 0000:00:14.3: 0x0000FF88 | data1
...
</code>

Contournement provisoire
<code bash>
lsmod | grep 802

modprobe -r iwlmvm
modprobe -r libarc4
modprobe -r mac80211

modprobe mac80211
modprobe libarc4
modprobe iwlmvm
</code>