+ @property
+ def nat_list(self):
+ """ Support a list of ports in the format "protocol:port, protocol:port, ..."
+ examples:
+ tcp 123
+ tcp 123:133
+ tcp 123, tcp 124, tcp 125, udp 201, udp 202
+
+ User can put either a "/" or a " " between protocol and ports
+ Port ranges can be specified with "-" or ":"
+ """
+ nats = []
+ if self.ports:
+ parts = self.ports.split(",")
+ for part in parts:
+ part = part.strip()
+ if "/" in part:
+ (protocol, ports) = part.split("/",1)
+ elif " " in part:
+ (protocol, ports) = part.split(None,1)
+ else:
+ raise TypeError('malformed port specifier %s, format example: "tcp 123, tcp 201:206, udp 333"' % part)
+
+ protocol = protocol.strip()
+ ports = ports.strip()
+
+ if not (protocol in ["udp", "tcp"]):
+ raise TypeError('unknown protocol %s' % protocol)
+
+ if "-" in ports:
+ (first, last) = ports.split("-")
+ first = int(first.strip())
+ last = int(last.strip())
+ portStr = "%d:%d" % (first, last)
+ elif ":" in ports:
+ (first, last) = ports.split(":")
+ first = int(first.strip())
+ last = int(last.strip())
+ portStr = "%d:%d" % (first, last)
+ else:
+ portStr = "%d" % int(ports)
+
+ nats.append( {"l4_protocol": protocol, "l4_port": portStr} )
+
+ return nats
+