Update api

doc/api.org

@@ -4,14 +4,10 @@
 #+LATEX_HEADER: \usepackage{fullpage}
 
 * General Description
-  - All transmissions will be based on TCP since:
-    - Packet length are not fixed (large variance depending on the snake size and food)
-    - Packet ordering is important (inverted request can compromise gameplay)
-  - All TCP streams from *client to server* will:
-    - Contain _plain json data_
-    - Be terminated by an "#EOF" line (in order for the server to detect the end of the client request)
-  - All TCP stream from *server to client* will contains _plain json data_ (connection will be closed by the server
-    so, there is no need of "#EOF").
+  - All transmissions will be based on UDP since latency is important
+  - All UDP datagrams between *client and server* will contain _plain json data_
+  - All data should be sent in *one* datagram
+  - All utf-8 characters in UDP datagram are in lower case
 * Communications 
 ** Initialisation
    1. Client sent:
@@ -19,7 +15,6 @@
         {
             "type": "new-game"
         }
-        #EOF
       #+END_SRC
    2. Server can reply:
       #+BEGIN_SRC json
@@ -40,7 +35,6 @@
              "game-id": 1,
              "direction": "left",
          }
-         #EOF
        #+END_SRC
     2. Then, server can reply:
        #+BEGIN_SRC json
@@ -60,7 +54,6 @@
              "game-id": 1,
              "direction": null
          }
-         #EOF
        #+END_SRC
     2. Server can reply:
        #+BEGIN_SRC json