fix(coap-server): ignore incoming requests with an invalid source port (#1188)

* fix(coap-server): ignore incoming messages with an invalid source port

* fixup! fix(coap-server): ignore incoming messages with an invalid source port

* fixup! fix(coap-server): ignore incoming messages with an invalid source port

Author: JKRhb

packages/binding-coap/src/coap-server.ts

@@ -435,6 +435,14 @@ export default class CoapServer implements ProtocolServer {
     }
 
     private async handleRequest(req: IncomingMessage, res: OutgoingMessage) {
+        const sourcePort = req.rsinfo.port;
+        const hasInvalidPortRange = sourcePort < 1 || sourcePort > 65535;
+        if (hasInvalidPortRange) {
+            // Ignore requests with an invalid source port
+            // See https://github.com/eclipse-thingweb/node-wot/issues/1182
+            return;
+        }
+
         const origin = this.formatRequestOrigin(req);
 
         debug(