OpenWrt – Rev 1

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#!/bin/sh
[ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1

. /lib/functions.sh
. /lib/netifd/netifd-proto.sh

set_classless_routes() {
        local max=128
        while [ -n "$1" -a -n "$2" -a $max -gt 0 ]; do
                proto_add_ipv4_route "${1%%/*}" "${1##*/}" "$2" "$ip"
                max=$(($max-1))
                shift 2
        done
}

setup_interface () {
        proto_init_update "*" 1
        proto_add_ipv4_address "$ip" "${subnet:-255.255.255.0}"
        # TODO: apply $broadcast

        local ip_net
        eval "$(ipcalc.sh "$ip/$mask")";ip_net="$NETWORK"

        local i
        for i in $router; do
                local gw_net
                eval "$(ipcalc.sh "$i/$mask")";gw_net="$NETWORK"

                [ "$ip_net" != "$gw_net" ] && proto_add_ipv4_route "$i" 32 "" "$ip"
                proto_add_ipv4_route 0.0.0.0 0 "$i" "$ip"

                local r
                for r in $CUSTOMROUTES; do
                        proto_add_ipv4_route "${r%%/*}" "${r##*/}" "$i" "$ip"
                done
        done

        # CIDR STATIC ROUTES (rfc3442)
        [ -n "$staticroutes" ] && set_classless_routes $staticroutes
        [ -n "$msstaticroutes" ] && set_classless_routes $msstaticroutes

        for i in $dns; do
                proto_add_dns_server "$i"
        done
        for i in $domain; do
                proto_add_dns_search "$i"
        done

        proto_add_data
        [ -n "$ZONE" ]     && json_add_string zone "$ZONE"
        [ -n "$ntpsrv" ]   && json_add_string ntpserver "$ntpsrv"
        [ -n "$timesvr" ]  && json_add_string timeserver "$timesvr"
        [ -n "$hostname" ] && json_add_string hostname "$hostname"
        [ -n "$message" ]  && json_add_string message "$message"
        [ -n "$timezone" ] && json_add_int timezone "$timezone"
        [ -n "$lease" ]    && json_add_int leasetime "$lease"
        proto_close_data

        proto_send_update "$INTERFACE"


        if [ "$IFACE6RD" != 0 -a -n "$ip6rd" ]; then
                local v4mask="${ip6rd%% *}"
                ip6rd="${ip6rd#* }"
                local ip6rdprefixlen="${ip6rd%% *}"
                ip6rd="${ip6rd#* }"
                local ip6rdprefix="${ip6rd%% *}"
                ip6rd="${ip6rd#* }"
                local ip6rdbr="${ip6rd%% *}"

                [ -n "$ZONE" ] || ZONE=$(fw3 -q network $INTERFACE 2>/dev/null)
                [ -z "$IFACE6RD" -o "$IFACE6RD" = 1 ] && IFACE6RD=${INTERFACE}_6

                json_init
                json_add_string name "$IFACE6RD"
                json_add_string ifname "@$INTERFACE"
                json_add_string proto "6rd"
                json_add_string peeraddr "$ip6rdbr"
                json_add_int ip4prefixlen "$v4mask"
                json_add_string ip6prefix "$ip6rdprefix"
                json_add_int ip6prefixlen "$ip6rdprefixlen"
                json_add_string tunlink "$INTERFACE"
                [ -n "$IFACE6RD_DELEGATE" ] && json_add_boolean delegate "$IFACE6RD_DELEGATE"
                [ -n "$ZONE6RD" ] || ZONE6RD=$ZONE
                [ -n "$ZONE6RD" ] && json_add_string zone "$ZONE6RD"
                [ -n "$MTU6RD" ] && json_add_string mtu "$MTU6RD"
                json_close_object

                ubus call network add_dynamic "$(json_dump)"
        fi
}

deconfig_interface() {
        proto_init_update "*" 0
        proto_send_update "$INTERFACE"
}

case "$1" in
        deconfig)
                deconfig_interface
        ;;
        renew|bound)
                setup_interface
        ;;
esac

# user rules
[ -f /etc/udhcpc.user ] && . /etc/udhcpc.user "$@"

exit 0