large init script cleanup and merge of whiterussian changes, new dnsmasq config handling

[openwrt/svn-archive/archive.git] / openwrt / package / iptables / files / firewall.awk

diff --git a/openwrt/package/iptables/files/firewall.awk b/openwrt/package/iptables/files/firewall.awk
new file mode 100644 (file)
index 0000000..1b63f83
--- /dev/null
+++ b/openwrt/package/iptables/files/firewall.awk
@@ -0,0 +1,64 @@
+BEGIN {
+       print "proto=\"$wan_proto\""
+       print "[ -z \"$proto\" -o \"$proto\" = \"none\" ] && exit"
+       print "ifname=\"$wan_ifname\""
+       print "[ -z \"$ifname\" ] && exit"
+       print ""
+       print "iptables -X input_$ifname 2>&- >&-"
+       print "iptables -N input_$ifname"
+       print "iptables -X forward_$ifname 2>&- >&-"
+       print "iptables -N forward_$ifname"
+       print "iptables -t nat -X prerouting_$ifname 2>&- >&-"
+       print "iptables -t nat -N prerouting_$ifname"
+       print ""
+       print "iptables -A input_rule -i \"$ifname\" -j input_$ifname"
+       print "iptables -A forwarding_rule -i \"$ifname\" -j forward_$ifname"
+       print "iptables -t nat -A prerouting_rule -i \"$ifname\" -j prerouting_$ifname"
+       print ""
+       FS=":"
+}
+
+($1 == "accept") || ($1 == "drop") || ($1 == "forward") {
+       delete _opt
+       str2data($2)
+       if ((_l["proto"] == "") && (_l["sport"] _l["dport"] != "")) {
+               _opt[0] = " -p tcp"
+               _opt[1] = " -p udp"
+       } else {
+               _opt[0] = ""
+       }
+}
+
+($1 == "accept") {
+       target = " -j ACCEPT"
+       for (o in _opt) {
+               print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) target
+               print "iptables        -A input_$ifname     " _opt[o] str2ipt($2) target
+               print ""
+       }
+}
+
+($1 == "drop") {
+       for (o in _opt) {
+               print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) " -j DROP"
+               print ""
+       }
+}
+
+($1 == "forward") {
+       target = " -j DNAT --to " $3
+       fwopts = ""
+       if ($4 != "") {
+               if ((_l["proto"] == "tcp") || (_l["proto"] == "udp") || (_l["proto"] == "")) {
+                       if (_l["proto"] != "") fwopts = " -p " _l["proto"]
+                       fwopts = fwopts " --dport " $4
+                       target = target ":" $4
+               }
+               else fwopts = ""
+       }
+       for (o in _opt) {
+               print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) target
+               print "iptables        -A forward_$ifname   " _opt[o] " -d " $3 fwopts " -j ACCEPT"
+               print ""
+       }
+}