github.com/m3db/m3@v1.5.0/src/x/tcp/tcp.go (about)

     1  // Copyright (c) 2017 Uber Technologies, Inc.
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    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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    19  // THE SOFTWARE.
    20  
    21  // Package tcp implements a tcp listener.
    22  package tcp
    23  
    24  import (
    25  	"net"
    26  	"time"
    27  )
    28  
    29  // NewTCPListener is Listener specifically for TCP
    30  //
    31  // TODO(jeromefroe): Move this into the net package which covers network I/O.
    32  func NewTCPListener(listenAddress string, keepAlivePeriod time.Duration) (net.Listener, error) {
    33  	l, err := net.Listen("tcp", listenAddress)
    34  	if err != nil {
    35  		return nil, err
    36  	}
    37  	return tcpKeepAliveListener{l.(*net.TCPListener), keepAlivePeriod}, err
    38  }
    39  
    40  // tcpKeepAliveListener sets TCP keep-alive timeouts on accepted
    41  // connections. It's used by ListenAndServe and ListenAndServeTLS so
    42  // dead TCP connections (e.g. closing laptop mid-download) eventually
    43  // go away. This is cargo culted from http/server.go
    44  type tcpKeepAliveListener struct {
    45  	*net.TCPListener
    46  	keepAlivePeriod time.Duration
    47  }
    48  
    49  func (ln tcpKeepAliveListener) Accept() (c net.Conn, err error) {
    50  	tc, err := ln.AcceptTCP()
    51  	if err != nil {
    52  		return
    53  	}
    54  	tc.SetKeepAlive(true)
    55  	tc.SetKeepAlivePeriod(ln.keepAlivePeriod)
    56  	return tc, nil
    57  }