66 lines
1.8 KiB
Awk
66 lines
1.8 KiB
Awk
BEGIN {
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print ". /etc/config/network"
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print "proto=\"$wan_proto\""
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print "[ -z \"$proto\" -o \"$proto\" = \"none\" ] && exit"
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print "ifname=\"$wan_ifname\""
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print "[ -z \"$ifname\" ] && exit"
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print ""
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print "iptables -X input_$ifname 2>&- >&-"
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print "iptables -N input_$ifname"
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print "iptables -X forward_$ifname 2>&- >&-"
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print "iptables -N forward_$ifname"
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print "iptables -t nat -X prerouting_$ifname 2>&- >&-"
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print "iptables -t nat -N prerouting_$ifname"
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print ""
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print "iptables -A input_rule -i \"$ifname\" -j input_$ifname"
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print "iptables -A forwarding_rule -i \"$ifname\" -j forward_$ifname"
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print "iptables -t nat -A prerouting_rule -i \"$ifname\" -j prerouting_$ifname"
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print ""
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FS=":"
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}
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($1 == "accept") || ($1 == "drop") || ($1 == "forward") {
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delete _opt
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str2data($2)
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if ((_l["proto"] == "") && (_l["sport"] _l["dport"] != "")) {
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_opt[0] = " -p tcp"
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_opt[1] = " -p udp"
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} else {
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_opt[0] = ""
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}
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}
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($1 == "accept") {
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target = " -j ACCEPT"
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for (o in _opt) {
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print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) target
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print "iptables -A input_$ifname " _opt[o] str2ipt($2) target
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print ""
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}
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}
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($1 == "drop") {
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for (o in _opt) {
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print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) " -j DROP"
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print ""
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}
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}
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($1 == "forward") {
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target = " -j DNAT --to " $3
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fwopts = ""
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if ($4 != "") {
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if ((_l["proto"] == "tcp") || (_l["proto"] == "udp") || (_l["proto"] == "")) {
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if (_l["proto"] != "") fwopts = " -p " _l["proto"]
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fwopts = fwopts " --dport " $4
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target = target ":" $4
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}
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else fwopts = ""
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}
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for (o in _opt) {
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print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) target
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print "iptables -A forward_$ifname " _opt[o] " -d " $3 fwopts " -j ACCEPT"
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print ""
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}
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}
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