added methods for Client to send and receive messages

src/client/client_internal.h

@@ -3,6 +3,7 @@
 #include "cryptography/AES.h"
 #include "cryptography/RSA.h"
 #include "network/encrypted_sockets.h"
+#include "network/tcp-chat-protocol/v1.h"
 
 typedef struct ServerConnection ServerConnection;
 
@@ -12,7 +13,6 @@ typedef struct Client {
     ServerConnection* conn;
 } Client;
 
-
 typedef struct ServerConnection {
     Client* client;
     EndpointIPv4 server_end;
@@ -23,6 +23,7 @@ typedef struct ServerConnection {
     EncryptedSocketTCP sock;
     i64 session_id;
     i64 user_id;
+    MessageBlock received_message_block;
 } ServerConnection;
 
 /// @param server_addr_cstr