// Copyright 2018 The go-ethereum Authors // This file is part of the go-ethereum library. // // The go-ethereum library is free software: you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // The go-ethereum library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public License // along with the go-ethereum library. If not, see . package pipes import ( "net" ) // NetPipe wraps net.Pipe in a signature returning an error func NetPipe() (net.Conn, net.Conn, error) { p1, p2 := net.Pipe() return p1, p2, nil } // TCPPipe creates an in process full duplex pipe based on a localhost TCP socket func TCPPipe() (net.Conn, net.Conn, error) { l, err := net.Listen("tcp", "127.0.0.1:0") if err != nil { return nil, nil, err } defer l.Close() var aconn net.Conn aerr := make(chan error, 1) go func() { var err error aconn, err = l.Accept() aerr <- err }() dconn, err := net.Dial("tcp", l.Addr().String()) if err != nil { <-aerr return nil, nil, err } if err := <-aerr; err != nil { dconn.Close() return nil, nil, err } return aconn, dconn, nil }