Punch through flags for incoming calls
diff --git a/include/grpc/impl/codegen/grpc_types.h b/include/grpc/impl/codegen/grpc_types.h
index b11f6ff..2c39f4b 100644
--- a/include/grpc/impl/codegen/grpc_types.h
+++ b/include/grpc/impl/codegen/grpc_types.h
@@ -250,6 +250,7 @@
   char *host;
   size_t host_capacity;
   gpr_timespec deadline;
+  uint32_t flags;
   void *reserved;
 } grpc_call_details;