115 lines
2.3 KiB
Go
115 lines
2.3 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package cluster
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import (
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"crypto/tls"
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"net"
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"sync"
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"time"
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log "github.com/hashicorp/go-hclog"
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"github.com/hashicorp/go-multierror"
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"go.uber.org/atomic"
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)
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// TCPLayer implements the NetworkLayer interface and uses TCP as the underlying
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// network.
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type TCPLayer struct {
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listeners []NetworkListener
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addrs []*net.TCPAddr
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logger log.Logger
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l sync.Mutex
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stopped *atomic.Bool
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}
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// NewTCPLayer returns a TCPLayer.
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func NewTCPLayer(addrs []*net.TCPAddr, logger log.Logger) *TCPLayer {
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return &TCPLayer{
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addrs: addrs,
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logger: logger,
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stopped: atomic.NewBool(false),
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}
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}
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// Addrs implements NetworkLayer.
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func (l *TCPLayer) Addrs() []net.Addr {
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l.l.Lock()
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defer l.l.Unlock()
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if len(l.addrs) == 0 {
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return nil
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}
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ret := make([]net.Addr, len(l.addrs))
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for i, a := range l.addrs {
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ret[i] = a
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}
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return ret
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}
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// Listeners implements NetworkLayer. It starts a new TCP listener for each
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// configured address.
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func (l *TCPLayer) Listeners() []NetworkListener {
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l.l.Lock()
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defer l.l.Unlock()
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if l.listeners != nil {
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return l.listeners
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}
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listeners := []NetworkListener{}
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for i, laddr := range l.addrs {
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if l.logger.IsInfo() {
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l.logger.Info("starting listener", "listener_address", laddr)
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}
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tcpLn, err := net.ListenTCP("tcp", laddr)
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if err != nil {
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l.logger.Error("error starting listener", "error", err)
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continue
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}
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if laddr.String() != tcpLn.Addr().String() {
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// If we listened on port 0, record the port the OS gave us.
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l.addrs[i] = tcpLn.Addr().(*net.TCPAddr)
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}
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listeners = append(listeners, tcpLn)
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}
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l.listeners = listeners
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return listeners
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}
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// Dial implements the NetworkLayer interface.
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func (l *TCPLayer) Dial(address string, timeout time.Duration, tlsConfig *tls.Config) (*tls.Conn, error) {
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dialer := &net.Dialer{
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Timeout: timeout,
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}
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return tls.DialWithDialer(dialer, "tcp", address, tlsConfig)
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}
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// Close implements the NetworkLayer interface.
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func (l *TCPLayer) Close() error {
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if l.stopped.Swap(true) {
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return nil
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}
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l.l.Lock()
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defer l.l.Unlock()
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var retErr *multierror.Error
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for _, ln := range l.listeners {
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if err := ln.Close(); err != nil {
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retErr = multierror.Append(retErr, err)
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}
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}
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l.listeners = nil
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return retErr.ErrorOrNil()
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}
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