mirror of https://github.com/v2ray/v2ray-core
121 lines
2.6 KiB
Go
121 lines
2.6 KiB
Go
package internet
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import (
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"net"
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"context"
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"v2ray.com/core/app/log"
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"v2ray.com/core/common/errors"
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v2net "v2ray.com/core/common/net"
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"v2ray.com/core/common/retry"
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)
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var (
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transportListenerCache = make(map[TransportProtocol]ListenFunc)
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)
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func RegisterTransportListener(protocol TransportProtocol, listener ListenFunc) error {
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if _, found := transportListenerCache[protocol]; found {
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return errors.New("Internet|TCPHub: ", protocol, " listener already registered.")
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}
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transportListenerCache[protocol] = listener
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return nil
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}
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type ListenFunc func(ctx context.Context, address v2net.Address, port v2net.Port) (Listener, error)
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type Listener interface {
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Accept() (Connection, error)
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Close() error
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Addr() net.Addr
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}
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type TCPHub struct {
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listener Listener
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connCallback ConnectionHandler
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closed chan bool
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}
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func ListenTCP(address v2net.Address, port v2net.Port, callback ConnectionHandler, settings *StreamConfig) (*TCPHub, error) {
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ctx := context.Background()
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protocol := settings.GetEffectiveProtocol()
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transportSettings, err := settings.GetEffectiveTransportSettings()
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if err != nil {
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return nil, err
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}
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ctx = ContextWithTransportSettings(ctx, transportSettings)
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if settings != nil && settings.HasSecuritySettings() {
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securitySettings, err := settings.GetEffectiveSecuritySettings()
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if err != nil {
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return nil, err
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}
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ctx = ContextWithSecuritySettings(ctx, securitySettings)
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}
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listenFunc := transportListenerCache[protocol]
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if listenFunc == nil {
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return nil, errors.New("Internet|TCPHub: ", protocol, " listener not registered.")
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}
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listener, err := listenFunc(ctx, address, port)
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if err != nil {
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return nil, errors.Base(err).Message("Internet|TCPHub: Failed to listen on address: ", address, ":", port)
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}
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hub := &TCPHub{
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listener: listener,
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connCallback: callback,
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}
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go hub.start()
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return hub, nil
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}
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func (v *TCPHub) Close() {
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defer func() {
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recover()
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}()
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select {
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case <-v.closed:
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return
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default:
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v.listener.Close()
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close(v.closed)
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}
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}
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func (v *TCPHub) start() {
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for {
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select {
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case <-v.closed:
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return
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default:
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}
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var newConn Connection
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err := retry.ExponentialBackoff(10, 500).On(func() error {
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select {
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case <-v.closed:
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return nil
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default:
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conn, err := v.listener.Accept()
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if err != nil {
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return errors.Base(err).RequireUserAction().Message("Internet|Listener: Failed to accept new TCP connection.")
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}
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newConn = conn
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return nil
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}
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})
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if err != nil {
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if errors.IsActionRequired(err) {
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log.Warning(err)
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} else {
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log.Info(err)
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}
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continue
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}
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if newConn != nil {
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go v.connCallback(newConn)
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}
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}
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}
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