1 # Copyright (C) 2009-2010 OpenWrt.org
3 fw_config_get_redirect() {
4 [ "${redirect_NAME}" != "$1" ] || return
5 fw_config_get_section "$1" redirect { \
17 string proto "tcpudp" \
19 string target "DNAT" \
22 [ -n "$redirect_name" ] || redirect_name=$redirect__name
26 fw_config_get_redirect "$1"
28 fw_callback pre redirect
30 local fwdchain natchain natopt nataddr natports srcdaddr srcdports
31 if [ "$redirect_target" == "DNAT" ]; then
32 [ -n "${redirect_src#*}" -a -n "$redirect_dest_ip$redirect_dest_port" ] || {
33 fw_log error "DNAT redirect ${redirect_name}: needs src and dest_ip or dest_port, skipping"
40 # Check whether only ports are given or whether the given dest ip is local,
41 # in this case match only DNATed traffic and allow it on input, not forward
42 if [ -z "$redirect_dest_ip" ] || /sbin/ifconfig | grep -qE "addr:${redirect_dest_ip//./\\.}\b"; then
43 fwdopt="-m conntrack --ctstate DNAT"
44 fwdchain="zone_${redirect_src}_input"
46 fwdchain="zone_${redirect_src}_forward"
49 natopt="--to-destination"
50 natchain="zone_${redirect_src}_prerouting"
51 nataddr="$redirect_dest_ip"
52 fw_get_port_range natports "${redirect_dest_port#!}" "-"
54 fw_get_negation srcdaddr '-d' "${redirect_src_dip:+$redirect_src_dip/$redirect_src_dip_prefixlen}"
55 fw_get_port_range srcdports "$redirect_src_dport" ":"
56 fw_get_negation srcdports '--dport' "$srcdports"
58 list_contains FW_CONNTRACK_ZONES $redirect_src || \
59 append FW_CONNTRACK_ZONES $redirect_src
61 elif [ "$redirect_target" == "SNAT" ]; then
62 [ -n "${redirect_dest#*}" -a -n "$redirect_src_dip" ] || {
63 fw_log error "SNAT redirect ${redirect_name}: needs dest and src_dip, skipping"
67 fwdchain="${redirect_src:+zone_${redirect_src}_forward}"
70 natchain="zone_${redirect_dest}_nat"
71 nataddr="$redirect_src_dip"
72 fw_get_port_range natports "${redirect_src_dport#!}" "-"
74 fw_get_negation srcdaddr '-d' "${redirect_dest_ip:+$redirect_dest_ip/$redirect_dest_ip_prefixlen}"
75 fw_get_port_range srcdports "$redirect_dest_port" ":"
76 fw_get_negation srcdports '--dport' "$srcdports"
78 list_contains FW_CONNTRACK_ZONES $redirect_dest || \
79 append FW_CONNTRACK_ZONES $redirect_dest
82 fw_log error "redirect ${redirect_name}: target must be either DNAT or SNAT, skipping"
87 fw_get_family_mode mode ${redirect_family:-x} ${redirect_src:-$redirect_dest} I
90 fw_get_negation srcaddr '-s' "${redirect_src_ip:+$redirect_src_ip/$redirect_src_ip_prefixlen}"
93 fw_get_port_range srcports "$redirect_src_port" ":"
94 fw_get_negation srcports '--sport' "$srcports"
97 fw_get_negation destaddr '-d' "${redirect_dest_ip:+$redirect_dest_ip/$redirect_dest_ip_prefixlen}"
100 fw_get_port_range destports "${redirect_dest_port:-$redirect_src_dport}" ":"
101 fw_get_negation destports '--dport' "$destports"
103 [ "$redirect_proto" == "tcpudp" ] && redirect_proto="tcp udp"
104 local pr; for pr in $redirect_proto; do
105 fw_get_negation pr '-p' "$pr"
106 local sm; for sm in ${redirect_src_mac:-""}; do
107 fw_get_negation sm '--mac-source' "$sm"
108 fw add $mode n $natchain $redirect_target + \
109 { $redirect_src_ip $redirect_dest_ip } { \
110 $srcaddr $srcdaddr $pr \
111 $srcports $srcdports \
113 $natopt $nataddr${natports:+:$natports} \
117 fw add $mode f ${fwdchain:-delegate_forward} ACCEPT + \
118 { $redirect_src_ip $redirect_dest_ip } { \
121 $srcports $destports \
129 fw_callback post redirect