[package] firewall:

[openwrt.git] / package / firewall / files / lib / core_redirect.sh

diff --git a/package/firewall/files/lib/core_redirect.sh b/package/firewall/files/lib/core_redirect.sh
new file mode 100644 (file)
index 0000000..0f0ccff
--- /dev/null
+++ b/package/firewall/files/lib/core_redirect.sh
@@ -0,0 +1,61 @@
+# Copyright (C) 2009-2010 OpenWrt.org
+
+fw_config_get_redirect() {
+       [ "${redirect_NAME}" != "$1" ] || return
+       fw_config_get_section "$1" redirect { \
+               string _name "$1" \
+               string name "" \
+               string src "" \
+               ipaddr src_ip "" \
+               ipaddr src_dip "" \
+               string src_mac "" \
+               string src_port "" \
+               string src_dport "" \
+               string dest "" \
+               ipaddr dest_ip "" \
+               string dest_mac "" \
+               string dest_port "" \
+               string proto "tcpudp" \
+       } || return
+       [ -n "$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" ] || {
+               fw_die "redirect ${redirect_name}: needs src and dest_ip"
+       }
+
+       local nat_dest_port=$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 $redirect_proto; do
+               fw add I n zone_${redirect_src}_prerouting DNAT $ { $redirect_src_ip $redirect_dest_ip } { \
+                       ${redirect_proto:+-p $redirect_proto} \
+                       ${redirect_src_ip:+-s $redirect_src_ip} \
+                       ${redirect_src_dip:+-d $redirect_src_dip} \
+                       ${redirect_src_port:+--sport $redirect_src_port} \
+                       ${redirect_src_dport:+--dport $redirect_src_dport} \
+                       ${redirect_src_mac:+-m mac --mac-source $redirect_src_mac} \
+                       --to-destination ${redirect_dest_ip}${redirect_dest_port:+:$nat_dest_port} \
+               }
+
+               fw add I f zone_${redirect_src}_forward ACCEPT ^ { $redirect_src_ip $redirect_dest_ip } { \
+                       -d $redirect_dest_ip \
+                       ${redirect_proto:+-p $redirect_proto} \
+                       ${redirect_src_ip:+-s $redirect_src_ip} \
+                       ${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
+}