#! /bin/sh

# this script has three usages:
# 1. start udhcpc client, rent an ip address and other info from a DHCP server.
# 2. a call back script of udhcpc, set DHCP information to /etc/config/network
# 3. restart lan swtich port to trigger client DHCP resending.

usage () {
    echo "$0 start [interface]"
    echo -e "\t default interface is apcli0"
    echo "$0 restart lan"
    echo "$0 help"
    exit 1
}


router_config_backup()
{
    local backup_file="/etc/config/.network.mode.router"
    [ -f $backup_file ] || cp /etc/config/network $backup_file
}

setup_interface () {
    [ -z "$ip" ] && exit 1
    netmask="${subnet:-255.255.255.0}"
    mtu="${mtu:-1500}"
    dns="${dns:-$router}"

uci -q batch <<EOF >/dev/null
set xiaoqiang.common.ap_hostname=$hostname
set xiaoqiang.common.vendorinfo=$vendorinfo
commit xiaoqiang
set network.lan=interface
set network.lan.type=bridge
set network.lan.proto=static
set network.lan.ipaddr=$ip
set network.lan.netmask=$netmask
set network.lan.gateway=$router
set network.lan.mtu=$mtu
del network.lan.dns
del network.vpn
EOF
    for d in $dns
    do
	uci -q add_list network.lan.dns=$d
    done
    uci commit network
    exit 0
}

start_dhcp () {
    model=$(uci -q get misc.hardware.model)
    [ -z "$model" ] && model=$(cat /proc/xiaoqiang/model)
    hostname="MiWiFi-$model"
    mypath=`dirname $0`
    cd $mypath >/dev/null
    abspath=`pwd`
    cd - >/dev/null
    ifname="$1"
    udhcpc -q -s $abspath/`basename $0` -t 3 -T 2 -i "$ifname" -H "$hostname" >/dev/null 2>&1
    exit $?
}

restart_lan () {
    exec /usr/sbin/phyhelper restart
    return $?
}

case "$1" in
    start)	
	start_dhcp "$2"
    ;;
    restart)
	restart_lan
        exit $?
    ;;
    renew|bound)
        #if xq already in ap mode,it don't need to backup route config file
	local ap_mode=`uci get network.ap_mode 2>/dev/null`
	[ "$ap_mode" != "bridgeap" ] && router_config_backup

	setup_interface
    ;;
    *)
	usage
    ;;
esac