#!/bin/sh
#----------------------------------------------------------------------------
# /etc/rc.d/circuits.route - route circuits
#
# Last Update:  $Id$
#----------------------------------------------------------------------------

# $1 = circuit information file
# $2 = variable receiving an error message (if any)
route_circuit_add()
{
    circ_dev=$circ_route_dev

    local route_ipv4_dev
    local route_ipv6_dev

    if [ -z "$circ_dev" ]
    then
        # if no interface is given explicitly, all non-empty gateways must
        # unambiguously map to the same device
        if [ -n "$circ_route_gateway_ipv4" ]
        then
            translate_ipv4_to_dev "$circ_route_gateway_ipv4" route_ipv4_dev || return 1
        fi
        if [ -n "$circ_route_gateway_ipv6" ]
        then
            translate_ipv6_to_dev "$circ_route_gateway_ipv6" route_ipv6_dev || return 1
        fi
        if [ -n "$circ_route_gateway_ipv4" -a -n "$circ_route_gateway_ipv6" -a "$route_ipv4_dev" != "$route_ipv6_dev" ]
        then
            eval $3="\"IPv4 gateway $circ_route_gateway_ipv4 and IPv6 gateway $circ_route_gateway_ipv6 map to different interfaces ($route_ipv4_dev and $route_ipv6_dev, resp.)\""
            return 1
        fi

        if [ -n "$route_ipv4_dev" ]
        then
            circ_dev=$route_ipv4_dev
        else
            circ_dev=$route_ipv6_dev
        fi
    else
        translate_net_if "$circ_dev" circ_dev 1

        # if an interface is given explicitly, gateways may be untranslatable;
        # this is the case for routes as "via <gw> dev <if>" for a gateway <gw>
        # that does not belong to any configured subnet
        if [ -n "$circ_route_gateway_ipv4" ]
        then
            translate_ipv4_to_dev "$circ_route_gateway_ipv4" route_ipv4_dev 1
        fi
        if [ -n "$circ_route_gateway_ipv6" ]
        then
            translate_ipv6_to_dev "$circ_route_gateway_ipv6" route_ipv6_dev 1
        fi

        if [ -n "$route_ipv4_dev" -a -n "$route_ipv6_dev" -a "$route_ipv4_dev" != "$route_ipv6_dev" ]
        then
            eval $3="\"IPv4 gateway $circ_route_gateway_ipv4 and IPv6 gateway $circ_route_gateway_ipv6 map to different interfaces ($route_ipv4_dev and $route_ipv6_dev, resp.)\""
            return 1
        fi
    fi

    if [ -n "$circ_route_gateway_ipv4" ]
    then
        case $circ_route_gateway_ipv4 in
        {*}*)
            local circuit=$(echo "$circ_route_gateway_ipv4" | sed -n 's/^{\([^}]*\)}.*$/\1/p')
            circ_deps="$circ_deps $circuit"
            ;;
        esac
    fi
    if [ -n "$circ_route_gateway_ipv6" ]
    then
        case $circ_route_gateway_ipv6 in
        {*}*)
            local circuit=$(echo "$circ_route_gateway_ipv6" | sed -n 's/^{\([^}]*\)}.*$/\1/p')
            circ_deps="$circ_deps $circuit"
            ;;
        esac
    fi

    circuit_allocate_device route circ_alias

    cat >> $1 <<EOF
circ_route_gateway_ipv4="$circ_route_gateway_ipv4"
circ_route_gateway_ipv6="$circ_route_gateway_ipv6"
EOF

    return 0
}