nanopb.proto: add msgid message-level option

diff --git a/generator/proto/nanopb.proto b/generator/proto/nanopb.proto
index a1b2493..3f2ed8e 100644 (file)
--- a/generator/proto/nanopb.proto
+++ b/generator/proto/nanopb.proto
@@ -56,6 +56,9 @@ message NanoPBOptions {
 
   // Generate oneof fields as normal optional fields instead of union.
   optional bool no_unions = 8 [default = false];
+
+  // integer type tag for a message
+  optional uint32 msgid = 9;
 }
 
 // Extensions to protoc 'Descriptor' type in order to define options