AP OPENWRT PC

=Hardware=

For target platform we will use standard PC with D-link DWA-520G (Atheros chipset) WiFi board compatible with [http://hostap.epitest.fi/hostapd/ hostapd]. We install 2 NIC (Intel Ethernet 100) to provide WAN and LAN interfaces.

=Build OpenWrt=

==Downloading==

I recommend download latest trunk version. Use subversion repo:<pre>[verem@aipetry ~]$ svn checkout https://svn.openwrt.org/openwrt/trunk kamikaze</pre>

After downloading rename directory - append trunk version suffix. I my case:<pre>mv kamikaze kamikaze-r11772</pre>

==Building prerequisites==

For build OpenWrt images i used FC8 (Fedora Core 8) distro. Make sure you have installed:
* gcc
* g++
* compat-gcc-34 (required due to some news changes in supplied gcc with FC8)
* compat-g++-34
* bison
* flex
* ncurses-devel
* zlib-devel

==Configuration==

Goto to source directory and configure:<pre>[verem@dev-2 src]$ cd kamikaze-r11772
[verem@dev-2 kamikaze-r11772]$ CC=gcc34 make menuconfig</pre>

Select:
* <code>Target system</code> <b>x86 [2.6]</b>
* Check:
** Select all packages by default
** Advanced configuration options (for developers)
** Buildsystem settings
** Build the OpenWrt Image Builder
** Image configuration
* override built-in for <b>Network</b>:
** hostapd
** hostapd-mini
** hostapd-utils
** wpa-supplicant
* override built-in for <b>Kernel modules</b> - <b>Network Devices</b> that will be used in your platform, in my case <i>Intel(R) PRO/100+ cards</i>.
* override built-in for <b>Kernel modules</b> - <b>Wireless Drivers</b> that will be used in your platform, in my case <i>Driver for Atheros wireless chipsets</i>

After this changes made exit and confirm changes saving

==Building==

Start building process:<pre>[verem@dev-2 kamikaze-r11772]$ CC=gcc34 make
++ mkdir -p /home/verem/src/kamikaze-r11772/staging_dir/toolchain-i386_gcc4.1.2
++ cd /home/verem/src/kamikaze-r11772/staging_dir/toolchain-i386_gcc4.1.2
++ mkdir -p bin lib include stamp

............
 make[3] -C target/linux install
 make[3] -C target/sdk install
 make[3] -C target/imagebuilder install
 make[2] package/index
[verem@dev-2 kamikaze-r11772]$

</pre>

=Installation=

Resulting images located in 

=Configure OpenWrt=

After firmware starts goto shell and edit (use vi) some configuration files.

Edit network configuration <code>/etc/config/network</code>:<pre>config interface loopback
        option ifname   lo
        option proto    static
        option ipaddr   127.0.0.1
        option netmask  255.0.0.0

config interface wan
        option ifname   eth0
        option proto    static
        option ipaddr   10.1.5.190
        option netmask  255.255.0.0
        option gateway  10.1.1.1
        option dns      10.1.1.1

config interface lan
        option type     bridge
        option ifname   "eth1 ath0"
        option proto    static
        option ipaddr   192.168.1.1
        option netmask  255.255.255.0</pre>

Edit wireless configuration <code>/etc/config/wireless</code>:<pre>config wifi-device  wifi0
        option type     atheros
        option channel  2

config wifi-iface
        option device   wifi0
        option mode     ap
        option ssid     home-home-openwrt
        option encryption psk2
        option key      0123456789ABCDEF</pre>
Customize channel and key used for your case.

Change root password to enable ssh login: <pre>root@OpenWrt:~# passwd
Changing password for root
New password:
Retype password:
Password for root changed by root
root@OpenWrt:~#</pre>

Allow <b>ssh</b> access to device from WAN port, <code>/etc/firewall.user</code>:<pre>[...]
### Open port to WAN
## -- This allows port 22 to be answered by (dropbear on) the router
iptables -t nat -A prerouting_wan -p tcp --dport 22 -j ACCEPT
iptables        -A input_wan      -p tcp --dport 22 -j ACCEPT
[...]</pre>

Reboot system: <pre>root@OpenWrt:~# reboot</pre>