Switcher manage Sending and Receiving Clients over Network

If Client is the first, they are the sending client.

If Client is the second, they are the receiving client. The final router will send data to this Client stored in the routerCount object.

Author: mangledbottles

Server/src/Switcher.ts

@@ -24,8 +24,11 @@ let FlowTable = new Map<String, String[]>([
   ["R3", ["R2", "E2"]],
 ]);
 
+let receivingClient = { ip: "", port: 0 };
+
 /** Receive Messages from Routers */
-let routerCount = 0;
+let routerCount: number = 0, clientCount: number = 0;
+
 Switcher.on('message', (msg, rinfo) => {
   console.log(`Server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
 
@@ -69,17 +72,29 @@ Switcher.on('message', (msg, rinfo) => {
     case 3:
       // Type 3: Client connecting to Router to get information about Forwarding Table
       console.log("Client connecting to Switcher");
-
-      // Get first Router in Routers list
-      var it = Routers.values();
-      
-      let firstRouter = it.next().value;
-      // TODO: If no Routers are active, save Client details and notify once a Router is connected
-      if(!firstRouter) sendMessage = { message: "No Routers active on Network" };
-      else sendMessage = JSON.parse(firstRouter);
-      
       messageType = 3;
 
+        // Get first Router in Routers list
+        var it = Routers.values();
+        
+        let firstRouter = it.next().value;
+        // TODO: If no Routers are active, save Client details and notify once a Router is connected
+        if(!firstRouter) return sendMessage = { message: "No Routers active on Network" };
+        else if(clientCount == 0) {
+          console.log("Initial Client Connected");
+          sendMessage = JSON.parse(firstRouter);
+        } else if(clientCount == 1) {
+          console.log("Receiving Client Connected");
+          // Store Client details for later use by last router
+          receivingClient.ip = address;
+          receivingClient.port = port;
+          sendMessage = "You are the receiving Client";
+        } else {
+          console.log("Additional Client connected, no space in Flow Table");
+          sendMessage = "You are not connected to the Network, no space.";
+        }
+        clientCount++;
+
   }
 
   // Send message to Client