Wireless autoconf » Historial » Revisió 12
Revisió 11 (Pau Escrich, 13-06-2011 18:18) → Revisió 12/15 (Pau Escrich, 13-06-2011 18:23)
h1. Wireless autoconf
h3. The UCI configuration
This is the wireless configuration for file: /etc/config/qmp
These are the default parameters sharing all wireless interfaces
<pre>
config 'qmp' 'wireless'
option 'driver' 'mac80211'
option 'country' 'UZ'
option 'bssid' '02:CA:FF:EE:BA:BE'
</pre>
driver can be `mac80211` for athXk, and `madwifi` for madwifi
And these are the config parameters for each wifi interface.
<pre>
config 'wireless'
option 'channel' '44'
option 'mode' 'adhoc'
option 'name' 'qmp'
option 'mac' '00:80:48:6b:25:b5'
config 'wireless'
option 'channel' '10'
option 'mode' 'ap'
option 'name' 'qmp.cat-AP'
option 'mac' '00:80:48:6b:25:b6'
</pre>
h3. qmp_wireless_config
To apply this configuration to device, you must execute this commands:
<pre>
. /etc/qmp/qmp_wireless.sh
qmp_configure_wifi
</pre>
This function takes the parameters from UCI and using the templates from: /etc/qmp/templates creates the openwrt wireless config
Templates are named like that: wireless.mac80211.adhoc wireless.madwifi.ap
Separed by dots, second name is the driver to use and third one is the mode.
These templates looks like this:
<pre>
config wifi-device #QMP_DEVICE
option type mac80211
option macaddr #QMP_MAC
option channel #QMP_CHANNEL
option diversity 0 # 0:off, 1:on
option txantenna 0 # 0:auto, 1:main, 2:aux
option rxantenna 0 # 0:auto, 1:main, 2:aux
option country #QMP_COUNTRY
option outdoor 1
# option txpower 1
config wifi-iface
option device #QMP_DEVICE
option mode adhoc
option ssid #QMP_SSID
option bssid #QMP_BSSID
option encryption none
</pre>
As you can see, the special words starting with witch #QMP will be replaced by UCI parameters.
So you can play a little with templates. For example, there is a template named: `wireless.mac80211.adhoc-n`
But the function qmp_wireless_config requires a complete configuration from UCI. So there is another function to generate the UCI config.
h3. qmp_wireless_config_initial
To execute this function:
<pre>
. /etc/qmp/qmp_wireless.sh
qmp_configure_wifi_initial
</pre>
This generates de UCI qmp configuration, but not allways from zero. You can have some parameters configured and the function will configure the rest for you.
For example, you can have a configuration like this:
<pre>
config 'wireless'
option 'channel' '132'
option 'mode' 'adhoc'
</pre>
And after execute qmp_configure_wifi_initial you will have the rest of needed parameters
<pre>
config 'wireless'
option 'channel' '132'
option 'mode' 'adhoc'
option 'name' 'qmp'
option 'mac' '00:80:48:6b:25:b5'
</pre>
So, if you want to use the first device for meshing and the second one for access point, you can build the openwrt image with this kind of configuration:
<pre>
config 'wireless'
option 'mode' 'adhoc'
config 'wireless'
option 'mode' 'ap'
</pre>
And after the first startup qmp_configure_wifi_initial will be executed putting the rest of parameters.
The default configuration is read from file: /etc/qmp/templates/wireless.default.config looks like that:
<pre>
driver mac80211
country UZ
bssid 02:CA:FF:EE:BA:BE
channel 44
mode adhoc
name qmp.cat
</pre>
Also if the `mac` option is specified, the function will find this device that has this mac-address and use it. If not, it will use the first one free