GET_CLIENT_FUNCTION
GET_CLIENT_FUNCTION(client_handle));
GET_CLIENT_FUNCTION(client_handle));
GET_CLIENT_FUNCTION(client_handle));
GET_CLIENT_FUNCTION(client_handle));
GET_CLIENT_FUNCTION(client_handle));
if (GET_CLIENT_FUNCTION(client->client_handle) == fn) {
fn = GET_CLIENT_FUNCTION(client_handle);