The MississippiNetworkRepeater is a NetgearWgt634u loaded with OpenWRT. It uses a HawkingHwu54g USB 802.11g radio as a client to any nearby www.personaltelco.net network and operates its native radio as a local coverage access point.

Building

To build one of the devices:

• load OpenWrt Kamikaze (here r6693) in a normal fashion, via serial console:

  • CFE> ifconfig eth0 -auto
    CFE> flash -noheader 192.168.0.5:wgt634u/wipe-1.img flash0.os
    CFE> flash -noheader -offset=3932160 192.168.0.5:wgt634u/wipe-2.img flash0.os
    CFE> flash -noheader 192.168.0.5:wgt634u/openwrt-wgt634u-2.6-jffs2-r6693.bin flash0.os
    CFE> reboot

• log into the AP via serial console
• set root password:

  • passwd                                                          

• configure /etc/ipkg.conf to point at a compatible package archive:

  • src snapshots http://www.personaltelco.net/~russell/openwrt/r6693
    dest root /
    dest ram /tmp

• install zd1211 packages:

  • ipkg install kmod-usb2
    ipkg install kmod-zd1211

• install iproute2 tools because I like them:

  • ipkg install ip

• configure /etc/config/wireless:

  • config wifi-device  wifi0
            option type     atheros
            option channel  11
    
    config wifi-iface
            option device   wifi0
    #       option network  lan
            option mode     ap
            option ssid     www.personaltelco.net/repeater
            option hidden   0
            option encryption none

• disable firewall script:

  • rm /etc/rc.d/S45firewall

• modify the lan stanza in /etc/config/network:

  • #### LAN configuration
    config interface lan
            option type     bridge
            option ifname   "eth0.0 ath0"
            option proto    static
            option ipaddr   192.168.3.1
            option netmask  255.255.255.0

• add a file /etc/init.d/repeater:

  • cat > /etc/init.d/repeater <<EOF
    #!/bin/sh
    
    echo "Initializing Repeater"
    
    /sbin/ifconfig wlan0 up
    /usr/sbin/iwconfig wlan0 essid www.personaltelco.net
    while /usr/sbin/iwconfig wlan0 2>/dev/null | grep Access | awk '{ print $5 }' | grep 00:00:00:00:00:00 ; do sleep 1 ; done
    /sbin/udhcpc -i wlan0
    /usr/sbin/iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
    EOF
    chmod 755 /etc/init.d/repeater

• create a link in /etc/rc.d:

  • cd /etc/rc.d
    ln -s /etc/init.d/repeater S90repeater

• turn of wan stanza's dhcp in /etc/config/network:

  • #### WAN configuration
    config interface        wan
            option ifname   "eth0.1"
            option proto    none

• install snmpd:

  • ipkg install snmpd

• configure /etc/snmp/snmpd.conf:

  • syslocation "<Location> MissNet-?? (repeater)" 
    syscontact "ops@personaltelco.net"
    
    rocommunity public
    
    exec assoc_count /usr/local/bin/assoc_count

• setup the /usr/local/bin/assoc_count script:

  • mkdir -p /usr/local/bin
    cat > /usr/local/bin/assoc_count <<EOF
    #!/bin/sh
    
    echo $(($(wc -l < /proc/net/madwifi/ath0/associated_sta)/3))
    EOF
    chmod 755 /usr/local/bin/assoc_count

• if necessary, patch up slightly broken /etc/init.d/usb permissions:

  • chmod 755 /etc/init.d/usb

• if necessary, create a symlink in /etc/rc.d to /etc/init.d/snmpd

  cd /etc/rc.d
  ln -s /etc/init.d/snmpd S70snmpd