| 1 | BEGIN {
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| 2 | print ". /etc/config/network"
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| 3 | print "proto=\"$wan_proto\""
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| 4 | print "[ -z \"$proto\" -o \"$proto\" = \"none\" ] && exit"
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| 5 | print "ifname=\"$wan_ifname\""
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| 6 | print "[ -z \"$ifname\" ] && exit"
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| 7 | print ""
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| 8 | print "iptables -X input_$ifname 2>&- >&-"
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| 9 | print "iptables -N input_$ifname"
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| 10 | print "iptables -X forward_$ifname 2>&- >&-"
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| 11 | print "iptables -N forward_$ifname"
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| 12 | print "iptables -t nat -X prerouting_$ifname 2>&- >&-"
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| 13 | print "iptables -t nat -N prerouting_$ifname"
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| 14 | print ""
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| 15 | print "iptables -A input_rule -i \"$ifname\" -j input_$ifname"
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| 16 | print "iptables -A forwarding_rule -i \"$ifname\" -j forward_$ifname"
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| 17 | print "iptables -t nat -A prerouting_rule -i \"$ifname\" -j prerouting_$ifname"
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| 18 | print ""
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| 19 | FS=":"
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| 20 | }
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| 21 |
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| 22 | ($1 == "accept") || ($1 == "drop") || ($1 == "forward") {
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| 23 | delete _opt
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| 24 | str2data($2)
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| 25 | if ((_l["proto"] == "") && (_l["sport"] _l["dport"] != "")) {
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| 26 | _opt[0] = " -p tcp"
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| 27 | _opt[1] = " -p udp"
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| 28 | } else {
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| 29 | _opt[0] = ""
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| 30 | }
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| 31 | }
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| 32 |
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| 33 | ($1 == "accept") {
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| 34 | target = " -j ACCEPT"
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| 35 | for (o in _opt) {
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| 36 | print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) target
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| 37 | print "iptables -A input_$ifname " _opt[o] str2ipt($2) target
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| 38 | print ""
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| 39 | }
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| 40 | }
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| 41 |
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| 42 | ($1 == "drop") {
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| 43 | for (o in _opt) {
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| 44 | print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) " -j DROP"
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| 45 | print ""
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| 46 | }
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| 47 | }
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| 48 |
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| 49 | ($1 == "forward") {
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| 50 | target = " -j DNAT --to " $3
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| 51 | fwopts = ""
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| 52 | if ($4 != "") {
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| 53 | if ((_l["proto"] == "tcp") || (_l["proto"] == "udp") || (_l["proto"] == "")) {
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| 54 | if (_l["proto"] != "") fwopts = " -p " _l["proto"]
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| 55 | fwopts = fwopts " --dport " $4
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| 56 | target = target ":" $4
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| 57 | }
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| 58 | else fwopts = ""
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| 59 | }
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| 60 | for (o in _opt) {
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| 61 | print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) target
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| 62 | print "iptables -A forward_$ifname " _opt[o] " -d " $3 fwopts " -j ACCEPT"
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| 63 | print ""
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| 64 | }
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| 65 | }
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