packages/net/wing/files/lib/network/wing.sh

scan_wing() {
       config_set "$1" device "wing-$1"
}

coldplug_interface_wing() {
        setup_interface_wing "wing-$1" "$1"
}

stop_interface_wing() {
       local config="$1"
       local iface="wing-$config"
       env -i ACTION="ifdown" INTERFACE="$config" DEVICE="$iface" PROTO=wing /sbin/hotplug-call "iface"&
       [ -f "/var/run/$iface.pid" ]&&  {
               kill -9 $(cat /var/run/$iface.pid)
               rm /var/run/$iface.pid
       }
}

setup_interface_wing() {

        local iface="$1"
        local config="$2"

       local hwmodes=""
       local freqs=""
       local ifnames=""
       local hwaddrs=""

       config_load wireless
       config_foreach wing_list_interfaces wifi-iface
       
       # start click router
       if [ "$hwmodes" = "" -o "$freqs" = "" -o "$ifnames" = "" -o "$hwaddrs" = "" ]; then
               logger -t "$config" "No raw interfaces available. Exiting."
               exit 1
       fi

       local profile rc ls prefix debug

       config_get profile $config profile "bulk"
       config_get rc $config rc "static"
       config_get ls $config ls "fcfs"
       config_get metric $config metric "wcett"
       config_get prefix $config prefix "6"
       config_get period $config period "10000"
       config_get tau $config tau "100000"
       config_get_bool debug $config debug "False"

       local hwaddr=$(echo $hwaddrs | sed 's/ .*//');
       local ipaddr=$(printf "$prefix.%d.%d.%d" $(echo $hwaddr | awk -F: '{printf "0x%s 0x%s 0x%s",$4,$5,$6}'))
       local netmask=255.0.0.0

       if ! wing_template_available "profile" "$profile" "bulk"; then
               logger -t "$config" "Unable to configure router. Exiting."
               exit 1
       fi

       if ! wing_template_available "rc" "$rc" "static"; then
               logger -t "$config" "Unable to configure rate control. Exiting."
               exit 1
       fi

       if ! wing_template_available "ls" "$ls" "radiotap"; then
               logger -t "$config" "Unable to configure link scheduler. Exiting."
               exit 1
       fi

       if [ "$profile" = "" -o "$rc" = "" ]; then
               logger -t "$config" "Unable to generate template. Exiting."
               exit 1
       fi

       [ "$debug" == 0 ]&&  dbg="" || dbg="-d"

       /usr/bin/click_config -p $profile -r $rc -s $ls -l $metric \
               -m "$hwmodes" -c "$freqs" -n "$ifnames" -a "$hwaddrs" $dbg \
               | sed -e "s/__XR_IFNAME__/$iface/g" \
               | sed -e "s/__XR_IP__/$ipaddr/g" \
               | sed -e "s/__XR_NM__/$netmask/g" \
               | sed -e "s/__XR_PERIOD__/$period/g" \
               | sed -e "s/__XR_TAU__/$tau/g">  /tmp/$iface.click

       /usr/bin/click-align /tmp/$iface.click>  /tmp/$iface-aligned.click 2>/var/log/$iface.log
       [ ! -c /dev/net/tun ]&&  {
               mkdir -p /dev/net/
               mknod /dev/net/tun c 10 200
               if [ ! -c /dev/net/tun ]; then
                       logger -t "$config" "Device not available (/dev/net/tun). Exiting."
                       exit 1
               fi
       }

       # creating the tun interface below will trigger a net subsystem event
       # prevent it from touching iface by disabling .auto here
       uci_set_state network "$config" auto 0

       (/usr/bin/click /tmp/$iface-aligned.click>>  /var/log/$iface.log 2>&1&)&
       sleep 2
       ps | grep /usr/bin/click | grep -q -v grep || {
               logger -t "$config" "Unable to start click. Exiting."
               exit 1
       }

       ps | grep /usr/bin/click | grep -v grep | awk '{print $1}'>  /var/run/$iface.pid

       ifconfig "$iface" "$ipaddr" netmask "$netmask"
       uci_set_state network $config ipaddr "$ipaddr"
       uci_set_state network $config netmask "$netmask"

       env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=wing /sbin/hotplug-call "iface"&

}

wing_template_available() { # prefix, template, default
       local template="/etc/wing/$1.$2.click"
       [ ! -f $template ]&&  {
               template="/etc/wing/$1.$3.click"
               [ ! -f $template ]&&  {
                       return 1
               }
       }
       return 0
}

wing_list_interfaces() {
       local channel freq hwmode hwaddr ifname mode
       config_get ifname $1 ifname
       config_get mode $1 mode
       config_get device $1 device
       config_get_bool up $1 up
       [ "$up" = "1" -a "$mode" = "monitor" ] || return 0
       config_get hwmode $device hwmode "11b"
       config_get channel $device channel "1"
       freq=$(iwlist $ifname freq | sed -n "s/^.*Channel 0*$channel : \([0-9.]*\).*/\1/p" | awk '{print $1*1000}')
       hwaddr=$(/sbin/ifconfig $ifname 2>&1 | sed -n 's/^.*HWaddr \([0-9A-Za-z\-]*\).*/\1/p' | sed -e 's/\-/:/g' | cut -c1-17)
       freqs=${freqs:+"$freqs "}$freq
       hwmodes=${hwmodes:+"$hwmodes "}$hwmode
       hwaddrs=${hwaddrs:+"$hwaddrs "}$hwaddr
       ifnames=${ifnames:+"$ifnames "}$ifname
       /sbin/ifconfig $ifname mtu 1900
       /sbin/ifconfig $ifname txqueuelen 5
       /sbin/ifconfig $ifname up
}