sc.goAway(http2ErrCodeNo)
				case http2shutdownTimerMsg:
					sc.vlogf("GOAWAY close timer fired; closing conn from %v", sc.conn.RemoteAddr())
					return
				case http2gracefulShutdownMsg:
					sc.startGracefulShutdownInternal()
				case http2handlerDoneMsg:
					sc.handlerDone()
				default:
					panic("unknown timer")
				}
			case *http2startPushRequest:
				sc.startPush(v)
			case func(*http2serverConn):