Update level 2 of intercepting communication

dojo.yml

@@ -25,8 +25,7 @@ modules:
   - id: level-1
     name: Connect
   - id: level-2
-    name: level2
-    description: Listen for a connection from a remote host
+    name: Listen
   - id: level-3
     name: level3
     description: Find and connect to a remote host

intercepting-communication/level-1/DESCRIPTION.md

@@ -1 +1 @@
-From your host at 10.0.0.1, connect to the target server at 10.0.0.2 on port 31337.
+From your host at 10.0.0.1, connect to the remote host at 10.0.0.2 on port 31337.

intercepting-communication/level-2/.init

@@ -0,0 +1 @@
+../.init

intercepting-communication/level-2/DESCRIPTION.md

@@ -0,0 +1 @@
+From your host at 10.0.0.1, listen on port 31337 for a connection from the remote host at 10.0.0.2.

intercepting-communication/level-2/run

@@ -0,0 +1,26 @@
+#!/usr/bin/exec-suid --real -- /usr/bin/python -I
+
+import socket
+from dojjail import Host, Network
+import time
+
+flag = open("/flag").read()
+
+class ClientHost(Host):
+    def entrypoint(self):
+        while True:
+            try:
+                client_socket = socket.socket()
+                client_socket.connect(("10.0.0.1", 31337))
+                client_socket.sendall(flag.encode())
+                client_socket.close()
+                time.sleep(1)
+            except (ConnectionError, TimeoutError):
+                continue
+
+user_host = Host("ip-10-0-0-1")
+server_host = ClientHost("ip-10-0-0-2")
+network = Network(hosts=[user_host, server_host])
+network.run()
+
+user_host.interact()