Restrict IMCs and IMVs to call SendMessage()

src/libcharon/tnc/tnccs/tnccs.h

@@ -72,8 +72,9 @@ typedef tnccs_t* (*tnccs_constructor_t)(bool is_server);
  * @param msg			message to be added
  * @param msg_len		message length
  * @param msg_type		message type
+ * @return			result code
  */
-typedef void (*tnccs_send_message_t)(tnccs_t* tncss, TNC_IMCID imc_id,
+typedef TNC_Result (*tnccs_send_message_t)(tnccs_t* tncss, TNC_IMCID imc_id,
 													 TNC_IMVID imv_id,
 									 				 TNC_BufferReference msg,
 													 TNC_UInt32 msg_len,

src/libcharon/tnc/tnccs/tnccs_manager.c

@@ -330,9 +330,8 @@ METHOD(tnccs_manager_t, send_message, TNC_Result,
 
 	if (tnccs && send_message)
 	{
-		send_message(tnccs, imc_id, imv_id, msg, msg_len, msg_type);
-		return TNC_RESULT_SUCCESS;
-	 }
+		return send_message(tnccs, imc_id, imv_id, msg, msg_len, msg_type);
+	}
 	return TNC_RESULT_FATAL;
 }