#!/bin/sh
#------------------------------------------------------------------------------
# /usr/share/circuits/proto/ipv4 - generic circuits (IPv4 specific)
#
# Last Update:  $Id$
#------------------------------------------------------------------------------

circuit_protocols="$circuit_protocols ipv4"

# Handles the IPv4-specific parts when adding a circuit.
# Input:
#   $1 = circuit information file
#   $2 = variable receiving an error message (if any)
# Side effects:
#   - circ_default_route is set to 'yes' if a default IPv4 route is associated
#     with this circuit.
# Exit code:
#   0 if network has been successfully handled by this function
#   1 if an error occurred (in this case, $2 is set to an error message)
circuit_add_ipv4()
{
    local circ_nets_ipv4_n=${circ_nets_ipv4_n:-0}
    circuit_write_field $circ_id circ_nets_ipv4_n $circ_nets_ipv4_n

    local i
    for i in $(seq 1 $circ_nets_ipv4_n)
    do
        eval local net=\$circ_nets_ipv4_$i gateway=\$circ_nets_ipv4_${i}_gateway
        local canon_net=$(circuit_resolve_address "$net" ipv4)
        local canon_gw=$(circuit_resolve_address "$gateway" ipv4 addr)
        if [ -z "$canon_net" ]
        then
            eval $2=\"invalid IPv4 network \'\$net\'\"
            return 2
        elif [ -z "$canon_gw" -a -n "$gateway" ]
        then
            eval $2=\"invalid IPv4 gateway \'\$gateway\'\"
            return 2
        else
            eval circ_nets_ipv4_$i=\$canon_net
            circuit_write_field $circ_id circ_nets_ipv4_$i $canon_net
            circuit_write_field $circ_id circ_nets_ipv4_${i}_gateway $canon_gw
            [ "$canon_net" = "0.0.0.0/0" ] && circ_default_route=yes
        fi
    done

    [ $circ_nets_ipv4_n -gt 0 ]
}