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# Copyright (C) 2009-2010 OpenWrt.org
fw_config_get_redirect() {
[ "${redirect_NAME}" != "$1" ] || return
fw_config_get_section "$1" redirect { \
string _name "$1" \
string name "" \
string src "" \
ipaddr src_ip "" \
ipaddr src_dip "" \
string src_mac "" \
string src_port "" \
string src_dport "" \
string dest "" \
ipaddr dest_ip "" \
string dest_mac "" \
string dest_port "" \
string proto "tcpudp" \
string family "" \
string target "DNAT" \
} || return
[ -n "$redirect_name" ] || redirect_name=$redirect__name
}
fw_load_redirect() {
fw_config_get_redirect "$1"
fw_callback pre redirect
[ -n "$redirect_src" -a -n "$redirect_dest_ip$redirect_dest_port" ] || {
fw_die "redirect ${redirect_name}: needs src and dest_ip or dest_port"
}
local chain destopt destaddr
if [ "$redirect_target" == "DNAT" ]; then
chain="zone_${redirect_src}_prerouting"
destopt="--to-destination"
destaddr="$redirect_dest_ip"
elif [ "$redirect_target" == "SNAT" ]; then
chain="zone_${redirect_src}_nat"
destopt="--to-source"
destaddr="$redirect_src_dip"
else
fw_die "redirect ${redirect_name}: target must be either DNAT or SNAT"
fi
list_contains FW_CONNTRACK_ZONES $redirect_src || \
append FW_CONNTRACK_ZONES $redirect_src
local mode=$(fw_get_family_mode ${redirect_family:-x} $redirect_src I)
local nat_dest_port=$redirect_dest_port
redirect_dest_port=$(fw_get_port_range $redirect_dest_port)
redirect_src_port=$(fw_get_port_range $redirect_src_port)
redirect_src_dport=$(fw_get_port_range $redirect_src_dport)
local fwd_dest_port=${redirect_dest_port:-$redirect_src_dport}
[ "$redirect_proto" == "tcpudp" ] && redirect_proto="tcp udp"
for redirect_proto in $redirect_proto; do
fw add $mode n $chain $redirect_target $ { $redirect_src_ip $redirect_dest_ip } { \
${redirect_proto:+-p $redirect_proto} \
${redirect_src_ip:+-s $redirect_src_ip/$redirect_src_ip_prefixlen} \
${redirect_src_dip:+-d $redirect_src_dip/$redirect_src_dip_prefixlen} \
${redirect_src_port:+--sport $redirect_src_port} \
${redirect_src_dport:+--dport $redirect_src_dport} \
${redirect_src_mac:+-m mac --mac-source $redirect_src_mac} \
$destopt ${redirect_dest_ip}${redirect_dest_port:+:$nat_dest_port} \
}
[ -n "$destaddr" ] && \
fw add $mode f zone_${redirect_src}_forward ACCEPT ^ { $redirect_src_ip $redirect_dest_ip } { \
-d $destaddr \
${redirect_proto:+-p $redirect_proto} \
${redirect_src_ip:+-s $redirect_src_ip/$redirect_src_ip_prefixlen} \
${redirect_src_port:+--sport $redirect_src_port} \
${fwd_dest_port:+--dport $fwd_dest_port} \
${redirect_src_mac:+-m mac --mac-source $redirect_src_mac} \
}
done
fw_callback post redirect
}
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