#!/bin/sh

. /lib/functions.sh

help()
{
    cat <<_HELP_
Setup WAN port on DHCP mode.
Usage: $0 {wan|wan1|wan2} [-d DNS[,DNS]] [-m MTU] [-rRS]
        -d DNS[,DNS] # Manually add dns list
        -m MTU # Set MTU on this interface
        -r # Add default route on this WAN port, It's default behavior.
        -R # Don't add default route on this WAN port
        -S # don't restart service
Example:
    $0 wan # Set port 'wan' as dhcp mode.
    $0 wan1 -d 8.8.8.8,9.9.9.9 # Set port 'wan' as dhcp mode with manual DNS settings.
    $0 wan -R # Set port 'wan' as dhcp mode, but don't set default route on it.
_HELP_
}


if [ $# -lt 1 ]; then
    help
    exit 1
fi

board=$(board_name)

case "$board" in
    WOOLINK-MT7621-512M-256M)
        ifx="$1";ifname="eth0.4094"
        ;;
    WOOLINK-MT7628-128M-32M)
        ifx="$1";ifname="eth0.4090"
        ;;
    *)
        case $1 in
            wan) ifx="$1";ifname="eth0";;
            wan1) ifx="$1";ifname="eth3";;
            wan2) ifx="$1";ifname="eth2";;
            *) help; exit 1;;
        esac
        ;;
esac
shift 1

defaultroute='1'
while [ -n "$1" ]; do
    case $1 in
        -d) dnss="$2";shift 2;;
        -R) defaultroute='0';shift 1;;
        -r) defaultroute='1';shift 1;;
        -m) mtu="$2";shift 2;;
        -S) no_restart='1';shift 1;;
        --) shift;break;;
        -*) help;exit 1;;
        *) break;;
    esac
done

uci set network.${ifx}='interface'
uci set network.${ifx}.ifname=$ifname
uci set network.${ifx}.proto='dhcp'
uci set network.${ifx}.defaultroute=$defaultroute
if [ "$board" != "WOOLINK-MT7621-512M-256M" -a "$board" != "WOOLINK-MT7628-128M-32M" ]
then
    uci set network.lan.ifname="eth1"
    uci set system.system.netmodel="0"
fi

if [ -n "$mtu" ]; then
    uci set network.${ifx}.mtu=$mtu
fi

uci delete network.${ifx}.dns
if [ -n "$dnss" ]; then
    for dns in ${dnss/,/ }; do
        uci add_list network.${ifx}.dns=$dns
    done
fi

uci commit network
uci commit system

if [ -z "$no_restart" ]; then
    /etc/init.d/network reload
fi

#if [ $defaultroute = '1' ]; then
#    ip r add default dev $ifname metric 1
#fi

echo "Set WAN port $ifx on DHCP client mode"

exit 0