Working pull request

echo_client.py

@@ -7,10 +7,10 @@ def client(msg, log_buffer=sys.stderr):
     server_address = ('localhost', 10000)
     # TODO: Replace the following line with your code which will instantiate
     #       a TCP socket with IPv4 Addressing, call the socket you make 'sock'
-    sock = None
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_IP)
     print('connecting to {0} port {1}'.format(*server_address), file=log_buffer)
     # TODO: connect your socket to the server here.
-
+    sock.connect(server_address)
     # you can use this variable to accumulate the entire message received back
     # from the server
     received_message = ''
@@ -20,6 +20,7 @@ def client(msg, log_buffer=sys.stderr):
     try:
         print('sending "{0}"'.format(msg), file=log_buffer)
         # TODO: send your message to the server here.
+        sock.sendall(msg.encode('utf-8'))
 
         # TODO: the server should be sending you back your message as a series
         #       of 16-byte chunks. Accumulate the chunks you get to build the
@@ -29,17 +30,29 @@ def client(msg, log_buffer=sys.stderr):
         #       Log each chunk you receive.  Use the print statement below to
         #       do it. This will help in debugging problems
         chunk = ''
-        print('received "{0}"'.format(chunk.decode('utf8')), file=log_buffer)
+
+        # Check for an empty reception
+        while True:
+            chunk = sock.recv(16)
+            print('received "{0}"'.format(chunk.decode('utf8')), file=log_buffer)
+            received_message += chunk
+            # If under 16 the message is finished
+            if len(chunk) < 16:
+                print("Message complete.")
+                break
+
     except Exception as e:
         traceback.print_exc()
         sys.exit(1)
     finally:
         # TODO: after you break out of the loop receiving echoed chunks from
         #       the server you will want to close your client socket.
         print('closing socket', file=log_buffer)
-
+        print('rcvd message: {}'.format(received_message))
+        sock.close()
         # TODO: when all is said and done, you should return the entire reply
         # you received from the server as the return value of this function.
+        return received_message
 
 
 if __name__ == '__main__':

echo_server.py

@@ -8,7 +8,7 @@ def server(log_buffer=sys.stderr):
     address = ('127.0.0.1', 10000)
     # TODO: Replace the following line with your code which will instantiate
     #       a TCP socket with IPv4 Addressing, call the socket you make 'sock'
-    sock = None
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_IP)
     # TODO: You may find that if you repeatedly run the server script it fails,
     #       claiming that the port is already used.  You can set an option on
     #       your socket that will fix this problem. We DID NOT talk about this
@@ -21,7 +21,8 @@ def server(log_buffer=sys.stderr):
 
     # TODO: bind your new sock 'sock' to the address above and begin to listen
     #       for incoming connections
-
+    sock.bind(address)
+    sock.listen(1)
     try:
         # the outer loop controls the creation of new connection sockets. The
         # server will handle each incoming connection one at a time.
@@ -33,7 +34,7 @@ def server(log_buffer=sys.stderr):
             #       the client so we can report it below.  Replace the
             #       following line with your code. It is only here to prevent
             #       syntax errors
-            conn, addr = ('foo', ('bar', 'baz'))
+            conn, addr = sock.accept()
             try:
                 print('connection - {0}:{1}'.format(*addr), file=log_buffer)
 
@@ -46,22 +47,22 @@ def server(log_buffer=sys.stderr):
                     #       following line with your code.  It's only here as
                     #       a placeholder to prevent an error in string
                     #       formatting
-                    data = b''
+                    data = conn.recv(16)
                     print('received "{0}"'.format(data.decode('utf8')))
 
                     # TODO: Send the data you received back to the client, log
                     # the fact using the print statement here.  It will help in
                     # debugging problems.
+                    sock.sendall(data)
                     print('sent "{0}"'.format(data.decode('utf8')))
 
                     # TODO: Check here to see whether you have received the end
                     # of the message. If you have, then break from the `while True`
                     # loop.
-                    # 
-                    # Figuring out whether or not you have received the end of the
-                    # message is a trick we learned in the lesson: if you don't
-                    # remember then ask your classmates or instructor for a clue.
-                    # :)
+
+                    if len(data) < 16:
+                        break
+
             except Exception as e:
                 traceback.print_exc()
                 sys.exit(1)
@@ -72,15 +73,18 @@ def server(log_buffer=sys.stderr):
                 print(
                     'echo complete, client connection closed', file=log_buffer
                 )
+                conn.close()
 
     except KeyboardInterrupt:
         # TODO: Use the python KeyboardInterrupt exception as a signal to
         #       close the server socket and exit from the server function.
         #       Replace the call to `pass` below, which is only there to
         #       prevent syntax problems
-        pass
+
         print('quitting echo server', file=log_buffer)
-
+        sock.close()
+        print("closing")
+        sys.exit(1)
 
 if __name__ == '__main__':
     server()

port_services.py

@@ -0,0 +1,28 @@
+"""
+Function to list services of all dedicated ports.
+"""
+
+import random
+import socket
+
+def porter(port=0):     
+    service = {}
+    try:
+        info = socket.getservbyport(port)
+        service[port] = info
+        return info
+
+    except OSError as e:
+        return None
+
+
+if __name__ == "__main__":
+    # porter(random.randint(0, 65535))
+    book = {}
+    for x in range(0, 65535+1):
+        received = porter(x)
+        if received:
+            book[x] = received
+
+    for key, val in book.items():
+        print(f"Port: {key} | Service: {val}")