Make grouping EarlyData and ClientHello a configuration option

configure.ac

@@ -2794,6 +2794,13 @@ AC_ARG_ENABLE([earlydata],
     [ ENABLED_TLS13_EARLY_DATA=$enableval ],
     [ ENABLED_TLS13_EARLY_DATA=no ]
     )
+
+if test "$ENABLED_TLS13_EARLY_DATA" = "group"
+then
+    ENABLED_TLS13_EARLY_DATA="yes"
+    # Group EarlyData with ClientHello
+    AM_CFLAGS="-DWOLFSSL_EARLY_DATA_GROUP $AM_CFLAGS"
+fi
 if test "$ENABLED_TLS13_EARLY_DATA" = "yes"
 then
     if test "x$ENABLED_TLS13" = "xno"
@@ -2812,6 +2819,7 @@ then
     AM_CFLAGS="$AM_CFLAGS -DNO_SESSION_CACHE"
 fi
 
+
 # PKCS7
 AC_ARG_ENABLE([pkcs7],
     [AS_HELP_STRING([--enable-pkcs7],[Enable PKCS7 (default: disabled)])],

src/internal.c

@@ -14764,7 +14764,9 @@ int SendData(WOLFSSL* ssl, const void* data, int sz)
             WOLFSSL_MSG("handshake complete, trying to send early data");
             return BUILD_MSG_ERROR;
         }
+    #ifdef WOLFSSL_EARLY_DATA_GROUP
         groupMsgs = 1;
+    #endif
     }
     else
 #endif

src/tls13.c

@@ -42,6 +42,8 @@
  *    and key generation input and output.
  * WOLFSSL_EARLY_DATA
  *    Allow 0-RTT Handshake using Early Data extensions and handshake message
+ * WOLFSSL_EARLY_DATA_GROUP
+ *    Group EarlyData message with ClientHello when sending
  * WOLFSSL_NO_SERVER_GROUPS_EXT
  *    Do not send the server's groups in an extension when the server's top
  *    preference is not in client's list.
@@ -2670,7 +2672,7 @@ int SendTls13ClientHello(WOLFSSL* ssl)
 
     ssl->buffers.outputBuffer.length += sendSz;
 
-#ifdef WOLFSSL_EARLY_DATA
+#ifdef WOLFSSL_EARLY_DATA_GROUP
     if (ssl->earlyData == no_early_data)
 #endif
         ret = SendBuffered(ssl);