Struct dialConn

controller/direct.go:11–14

dialConn 在原始连接基础上附带拨号延迟，供自适应复制逻辑使用。

const dialTimeout = 3 * time.Second

// configureTCP applies the transport settings used by every outbound TCP
// connection. DialFastContext deliberately returns the real *net.TCPConn so
// callers do not lose access to TCP-specific operations behind a wrapper.
func configureTCP(conn net.Conn) {
	tcpConn, ok := conn.(*net.TCPConn)
	if !ok {
		return