protocol.md

Client

1. Send "Hello name" message to the server where "name" is an identifier for the client.
2. Wait for a response (100 or 200) from the Server
3. If the client recieves a 100 message from the server as its first message, the client knows it was the first to connect and then
   • It waits for a second response from the server
   • When the client receives a second response from the server, it knows tha the second client has connected and the first client sends a message to the second client and waits for a message from the second client.
4. If the client receives a 200 message from the server as its first message, the client knows it was the second to connect and then
   • It waits for a message from the first client.
5. When either client receives a message from the other client, it sends one response message and waits for a reply
6. When a client receives a "Goodbye" message, it closes the socket and exits.

Server

1. Wait for "Hello name" message from first client.
   • When message is received, record the name, IP address and port number of the first client
   • Send 100 message to the first client
2. Wait for "Hello name" message from second client.
   • When message is received from second client, record the name, IP address and port nubmer of the second client b* Send 200 message to both clients.
3. Wait for message from a client.
   • if message is not "Goodbye" send it to the other clients
   • If message is "Goodbye" send it to both clients.
   • Close the socket and exit.