forked from TrueCloudLab/neoneo-go
d3bb8ddf8f
This makes writer side handle errors properly and fixes communication between reader and writer goroutine to always correctly unregister the peer. This is especially important for the case where error occurs before handshake completes as in this case we don't even have goroutine in startProtocol() running.
101 lines
1.9 KiB
Go
101 lines
1.9 KiB
Go
package network
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import (
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"net"
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"regexp"
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"time"
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log "github.com/sirupsen/logrus"
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)
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// TCPTransport allows network communication over TCP.
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type TCPTransport struct {
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server *Server
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listener net.Listener
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bindAddr string
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}
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var reClosedNetwork = regexp.MustCompile(".* use of closed network connection")
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// NewTCPTransport return a new TCPTransport that will listen for
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// new incoming peer connections.
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func NewTCPTransport(s *Server, bindAddr string) *TCPTransport {
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return &TCPTransport{
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server: s,
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bindAddr: bindAddr,
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}
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}
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// Dial implements the Transporter interface.
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func (t *TCPTransport) Dial(addr string, timeout time.Duration) error {
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conn, err := net.DialTimeout("tcp", addr, timeout)
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if err != nil {
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return err
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}
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go t.handleConn(conn)
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return nil
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}
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// Accept implements the Transporter interface.
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func (t *TCPTransport) Accept() {
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l, err := net.Listen("tcp", t.bindAddr)
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if err != nil {
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log.Fatalf("TCP listen error %s", err)
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return
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}
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t.listener = l
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for {
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conn, err := l.Accept()
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if err != nil {
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log.Warnf("TCP accept error: %s", err)
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if t.isCloseError(err) {
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break
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}
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continue
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}
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go t.handleConn(conn)
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}
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}
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func (t *TCPTransport) isCloseError(err error) bool {
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if opErr, ok := err.(*net.OpError); ok {
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if reClosedNetwork.Match([]byte(opErr.Error())) {
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return true
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}
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}
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return false
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}
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func (t *TCPTransport) handleConn(conn net.Conn) {
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var (
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p = NewTCPPeer(conn)
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err error
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)
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t.server.register <- p
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for {
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msg := &Message{}
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if err = msg.Decode(p.conn); err != nil {
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break
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}
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if err = t.server.handleMessage(p, msg); err != nil {
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break
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}
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}
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t.server.unregister <- peerDrop{p, err}
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p.Disconnect(err)
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}
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// Close implements the Transporter interface.
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func (t *TCPTransport) Close() {
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t.listener.Close()
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}
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// Proto implements the Transporter interface.
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func (t *TCPTransport) Proto() string {
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return "tcp"
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}
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