added definitions for sending and receiving messages

src/cli/ClientCLI/ClientCLI.c

@@ -1,8 +1,8 @@
+#include "tlibc/filesystem.h"
+#include "tcp-chat/common_constants.h"
 #include "cli/ClientCLI/ClientCLI.h"
 #include "cli/term.h"
-#include "tcp-chat/common_constants.h"
-#include "tlibc/time.h"
-#include "tlibc/filesystem.h"
+#include "network/tcp-chat-protocol/v1.h"
 
 static const str greeting_art = STR(
     "   ^,,^                           ╱|\n"
@@ -108,11 +108,11 @@ static Result(void) ClientCLI_askUserNameAndPassword(str* username_out, str* pas
         try_void(term_readLine(username_buf.data, username_buf.size));
         username = str_from_cstr(username_buf.data);
         str_trim(&username, true);
-        if(username.size < USERNAME_SIZE_MIN || username.size > USERNAME_SIZE_MAX){
-            printf("ERROR: username length (in bytes) must be >= %i and <= %i\n", 
-                USERNAME_SIZE_MIN, USERNAME_SIZE_MAX);
+        str name_error_str = validateUsername_str(username);
+        if(name_error_str.data){
+            printf("ERROR: "FMT_str"\n", 
+                name_error_str.size, name_error_str.data);
         }
-        //TODO: validate username characters
         else break;
     }