#!/bin/sh
CONFIG=1
source /usr/sbin/helper.sh

DNSMASQ_CONF=/tmp/etc/dnsmasq.conf


cmd_log () {
    logger "${2}[${1}] - ${3}"
}

cmd_run () {
    CMD=`${2}`
    ERRCODE=$?
    cmd_log ${ERRCODE} "${1}" "${ERR}: ${2}, ${CMD}"
    return ${ERRCODE}
}

iptable () {

    ARG="${1}"
    if [ $# -gt 3 ]; then
        ARG="${ARG} -d ${4}"
    fi

    cmd_run "iptable" "iptables -C ${2} -i ${ARG} -j ${3}"
    if [ $? -eq 1 ]; then
        cmd_run "iptable" "iptables -I ${2} -i ${ARG} -j ${3}"
    else
        cmd_run "iptable" "iptables -D ${2} -i ${ARG} -j ${3}"
        #iptable ${1} ${2} ${3} ${4}
    fi
}

ebtable () {


    CMD="-p ${2} -${4} ${1} -j ${3}"

    if [ `ebtables -t broute -L | grep -ice "${CMD}"` -eq 0 ]; then
        if [ $# -eq 1 ]; then
           cmd_run "ebtable" "ebtables ${1}"
           return $?
        else
            cmd_run "ebtable" "ebtables -t broute -I BROUTING ${CMD}"
        fi
    else
        cmd_run "ebtable" "ebtables -t broute -D BROUTING ${CMD}"
        if [ $# -eq 4 ]; then
            ebtable ${1} ${2} ${3} ${4}
        fi
    fi
    return $?
}

assign_ip () {
    IFACE="${1}"
    IFACE_INET_ADDR="${2}"

    IFACE_NWRK_ADDR="${IFACE_INET_ADDR%.*}.0"
    IFACE_MASK_ADDR="255.255.255.0"
    
    DHCP_START="${IFACE_INET_ADDR%.*}.${3}"
    DHCP_END="${IFACE_INET_ADDR%.*}.${4}"

    LAN=$(ifconfig "br0" | sed -ne's/.*inet addr:\([^ ]*\).*$/\1/p')

    echo "
    IFACE: ${IFACE}
    INET: ${IFACE_INET_ADDR}
    NWRK: ${IFACE_NWRK_ADDR}
    MASK: ${IFACE_MASK_ADDR}
    DCHP
        START:  ${DHCP_START}
        END:    ${DHCP_END}
    LAN: ${LAN}"

    ifconfig "${IFACE}" > /dev/null 2>&1 || continue

    cmd_run "ifconfig" "ifconfig ${IFACE} ${IFACE_INET_ADDR} netmask ${IFACE_MASK_ADDR}"

    ebtable "${IFACE}" "ipv4" "DROP" "i"
    ebtable "${IFACE}" "ipv6" "DROP" "i"
    ebtable "${IFACE}" "arp" "DROP" "i"
    
    iptable "${IFACE}" "FORWARD" "ACCEPT"
    iptable "${IFACE}" "INPUT" "ACCEPT"
    iptable "${IFACE}" "FORWARD" "DROP" "${LAN}/24"
    iptable "${IFACE}" "INPUT" "DROP" "${LAN}/24"

    ebtable "-D FORWARD -i ${IFACE} -j DROP"
    ebtable "-D FORWARD -o ${IFACE} -j DROP"

    if [ `cat ${DNSMASQ_CONF} | grep -c ${IFACE}` -eq 0 ]; then
        logger "dnsmasq-dhcp: Configure ${IFACE} to have special DHCP"
        pc_append "interface=${IFACE}" ${DNSMASQ_CONF}
        pc_append "dhcp-range=${IFACE},${DHCP_START},${DHCP_END},${IFACE_MASK_ADDR},24h" ${DNSMASQ_CONF}
        pc_append "dhcp-option=${IFACE},3,${IFACE_INET_ADDR}" ${DNSMASQ_CONF}
        #pc_append "dhcp-option=${IFACE},6,8.8.8.8,8.8.4.4" ${DNSMASQ_CONF}
        pc_append "dhcp-option=${IFACE},252,\"\n\"" ${DNSMASQ_CONF}
    fi

}


killall dnsmasq

if [ `cat ${DNSMASQ_CONF} | grep -c "log-dhcp"` -eq 0 ]; then
    pc_append "log-dhcp" ${DNSMASQ_CONF}
fi

assign_ip "wl0.1" "192.168.2.1" "128" "191" #/26
assign_ip "wl0.2" "192.168.3.1" "128" "191" #/26

cat ${DNSMASQ_CONF}

dnsmasq --log-async