Add a start_cb to grpc_udp_listener to be called when listener is

created.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/core/lib/iomgr/udp_server.h b/src/core/lib/iomgr/udp_server.h
index 02e3acb7f5..a469ab9be5 100644
--- a/src/core/lib/iomgr/udp_server.h
+++ b/src/core/lib/iomgr/udp_server.h
@@ -30,9 +30,12 @@ struct grpc_server;
 /* Forward decl of grpc_udp_server */
 typedef struct grpc_udp_server grpc_udp_server;
 
+/* Called when grpc server starts to listening on the grpc_fd. */
+typedef void (*grpc_udp_server_start_cb)(grpc_fd* emfd, void* user_data);
+
 /* Called when data is available to read from the socket.
  * Return true if there is more data to read from fd. */
-typedef bool (*grpc_udp_server_read_cb)(grpc_fd* emfd, void* user_data);
+typedef bool (*grpc_udp_server_read_cb)(grpc_fd* emfd);
 
 /* Called when the socket is writeable. The given closure should be scheduled
  * when the socket becomes blocked next time. */
@@ -65,6 +68,7 @@ int grpc_udp_server_get_fd(grpc_udp_server* s, unsigned port_index);
                   all of the multiple socket port matching logic in one place */
 int grpc_udp_server_add_port(grpc_udp_server* s,
                              const grpc_resolved_address* addr,
+                             grpc_udp_server_start_cb start_cb,
                              grpc_udp_server_read_cb read_cb,
                              grpc_udp_server_write_cb write_cb,
                              grpc_udp_server_orphan_cb orphan_cb);