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git://projects.qi-hardware.com/openwrt-xburst.git
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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29687 3c298f89-4303-0410-b956-a3cf2f4a3e73
131 lines
3.9 KiB
Bash
131 lines
3.9 KiB
Bash
# Copyright (C) 2009-2010 OpenWrt.org
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fw_config_get_redirect() {
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[ "${redirect_NAME}" != "$1" ] || return
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fw_config_get_section "$1" redirect { \
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string _name "$1" \
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string name "" \
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string src "" \
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ipaddr src_ip "" \
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ipaddr src_dip "" \
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string src_mac "" \
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string src_port "" \
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string src_dport "" \
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string dest "" \
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ipaddr dest_ip "" \
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string dest_port "" \
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string proto "tcpudp" \
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string family "" \
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string target "DNAT" \
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string extra "" \
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} || return
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[ -n "$redirect_name" ] || redirect_name=$redirect__name
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}
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fw_load_redirect() {
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fw_config_get_redirect "$1"
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fw_callback pre redirect
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local fwdchain natchain natopt nataddr natports srcdaddr srcdports
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if [ "$redirect_target" == "DNAT" ]; then
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[ -n "${redirect_src#*}" -a -n "$redirect_dest_ip$redirect_dest_port" ] || {
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fw_log error "DNAT redirect ${redirect_name}: needs src and dest_ip or dest_port, skipping"
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return 0
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}
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fwdopt=""
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fwdchain=""
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# Check whether only ports are given or whether the given dest ip is local,
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# in this case match only DNATed traffic and allow it on input, not forward
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if [ -z "$redirect_dest_ip" ] || /sbin/ifconfig | grep -qE "addr:${redirect_dest_ip//./\\.}\b"; then
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fwdopt="-m conntrack --ctstate DNAT"
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fwdchain="zone_${redirect_src}"
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else
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fwdchain="zone_${redirect_src}_forward"
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fi
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natopt="--to-destination"
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natchain="zone_${redirect_src}_prerouting"
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nataddr="$redirect_dest_ip"
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fw_get_port_range natports "${redirect_dest_port#!}" "-"
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fw_get_negation srcdaddr '-d' "${redirect_src_dip:+$redirect_src_dip/$redirect_src_dip_prefixlen}"
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fw_get_port_range srcdports "$redirect_src_dport" ":"
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fw_get_negation srcdports '--dport' "$srcdports"
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list_contains FW_CONNTRACK_ZONES $redirect_src || \
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append FW_CONNTRACK_ZONES $redirect_src
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elif [ "$redirect_target" == "SNAT" ]; then
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[ -n "${redirect_dest#*}" -a -n "$redirect_src_dip" ] || {
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fw_log error "SNAT redirect ${redirect_name}: needs dest and src_dip, skipping"
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return 0
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}
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fwdchain="${redirect_src:+zone_${redirect_src}_forward}"
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natopt="--to-source"
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natchain="zone_${redirect_dest}_nat"
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nataddr="$redirect_src_dip"
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fw_get_port_range natports "${redirect_src_dport#!}" "-"
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fw_get_negation srcdaddr '-d' "${redirect_dest_ip:+$redirect_dest_ip/$redirect_dest_ip_prefixlen}"
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fw_get_port_range srcdports "$redirect_dest_port" ":"
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fw_get_negation srcdports '--dport' "$srcdports"
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list_contains FW_CONNTRACK_ZONES $redirect_dest || \
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append FW_CONNTRACK_ZONES $redirect_dest
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else
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fw_log error "redirect ${redirect_name}: target must be either DNAT or SNAT, skipping"
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return 0
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fi
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local mode
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fw_get_family_mode mode ${redirect_family:-x} ${redirect_src:-$redirect_dest} I
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local srcaddr
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fw_get_negation srcaddr '-s' "${redirect_src_ip:+$redirect_src_ip/$redirect_src_ip_prefixlen}"
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local srcports
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fw_get_port_range srcports "$redirect_src_port" ":"
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fw_get_negation srcports '--sport' "$srcports"
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local destaddr
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fw_get_negation destaddr '-d' "${redirect_dest_ip:+$redirect_dest_ip/$redirect_dest_ip_prefixlen}"
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local destports
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fw_get_port_range destports "${redirect_dest_port:-$redirect_src_dport}" ":"
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fw_get_negation destports '--dport' "$destports"
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[ "$redirect_proto" == "tcpudp" ] && redirect_proto="tcp udp"
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local pr; for pr in $redirect_proto; do
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fw_get_negation pr '-p' "$pr"
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local sm; for sm in ${redirect_src_mac:-""}; do
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fw_get_negation sm '--mac-source' "$sm"
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fw add $mode n $natchain $redirect_target + \
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{ $redirect_src_ip $redirect_dest_ip } { \
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$srcaddr $srcdaddr $pr \
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$srcports $srcdports \
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${sm:+-m mac $sm} \
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$natopt $nataddr${natports:+:$natports} \
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$redirect_options \
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}
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fw add $mode f ${fwdchain:-forward} ACCEPT + \
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{ $redirect_src_ip $redirect_dest_ip } { \
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$srcaddr $destaddr \
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$pr \
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$srcports $destports \
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${sm:+-m mac $sm} \
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$fwdopt \
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$redirect_extra \
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}
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done
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done
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fw_callback post redirect
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}
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