github.com/linapex/ethereum-dpos-chinese@v0.0.0-20190316121959-b78b3a4a1ece/p2p/simulations/pipes/pipes.go (about)

     1  
     2  //<developer>
     3  //    <name>linapex 曹一峰</name>
     4  //    <email>linapex@163.com</email>
     5  //    <wx>superexc</wx>
     6  //    <qqgroup>128148617</qqgroup>
     7  //    <url>https://jsq.ink</url>
     8  //    <role>pku engineer</role>
     9  //    <date>2019-03-16 12:09:45</date>
    10  //</624342661779689472>
    11  
    12  
    13  package pipes
    14  
    15  import (
    16  	"net"
    17  )
    18  
    19  //net pipe在返回错误的签名中包装net.pipe
    20  func NetPipe() (net.Conn, net.Conn, error) {
    21  	p1, p2 := net.Pipe()
    22  	return p1, p2, nil
    23  }
    24  
    25  //tcp pipe基于本地主机tcp套接字创建进程内全双工管道
    26  func TCPPipe() (net.Conn, net.Conn, error) {
    27  	l, err := net.Listen("tcp", "127.0.0.1:0")
    28  	if err != nil {
    29  		return nil, nil, err
    30  	}
    31  	defer l.Close()
    32  
    33  	var aconn net.Conn
    34  	aerr := make(chan error, 1)
    35  	go func() {
    36  		var err error
    37  		aconn, err = l.Accept()
    38  		aerr <- err
    39  	}()
    40  
    41  	dconn, err := net.Dial("tcp", l.Addr().String())
    42  	if err != nil {
    43  		<-aerr
    44  		return nil, nil, err
    45  	}
    46  	if err := <-aerr; err != nil {
    47  		dconn.Close()
    48  		return nil, nil, err
    49  	}
    50  	return aconn, dconn, nil
    51  }
    52