1 files changed, 20 insertions, 0 deletions
diff --git a/src/components/protocol/src/message_priority.cc b/src/components/protocol/src/message_priority.cc
new file mode 100644
index 0000000000..b33636380f
--- /dev/null
+++ b/src/components/protocol/src/message_priority.cc
@@ -0,0 +1,20 @@
+#include "protocol_handler/service_type.h"
+#include "protocol_handler/message_priority.h"
+
+#include "utils/macro.h"
+
+namespace protocol_handler {
+
+// static
+const MessagePriority MessagePriority::kDefault = MessagePriority(0);
+
+// static
+MessagePriority MessagePriority::FromServiceType(ServiceType service_type) {
+  size_t message_priority_value = size_t(service_type);
+  DCHECK(message_priority_value <= 0xFF);
+  // According to Applink Protocol Specification v5 service with numerically
+  // lower service type identifiers have higher priority
+  return MessagePriority(0xFF - service_type);
+}
+
+} // namespace protocol_handler