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101 lines
2.1 KiB
101 lines
2.1 KiB
package internet
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import (
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"net"
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"sync"
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"v2ray.com/core/common/errors"
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"v2ray.com/core/common/log"
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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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ErrClosedConnection = errors.New("Connection already closed.")
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KCPListenFunc ListenFunc
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TCPListenFunc ListenFunc
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RawTCPListenFunc ListenFunc
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WSListenFunc ListenFunc
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)
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type ListenFunc func(address v2net.Address, port v2net.Port, options ListenOptions) (Listener, error)
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type ListenOptions struct {
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Stream *StreamConfig
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}
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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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sync.Mutex
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listener Listener
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connCallback ConnectionHandler
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accepting 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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var listener Listener
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var err error
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options := ListenOptions{
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Stream: settings,
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}
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switch settings.Network {
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case v2net.Network_TCP:
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listener, err = TCPListenFunc(address, port, options)
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case v2net.Network_KCP:
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listener, err = KCPListenFunc(address, port, options)
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case v2net.Network_WebSocket:
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listener, err = WSListenFunc(address, port, options)
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case v2net.Network_RawTCP:
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listener, err = RawTCPListenFunc(address, port, options)
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default:
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log.Error("Internet|Listener: Unknown stream type: ", settings.Network)
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err = ErrUnsupportedStreamType
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}
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if err != nil {
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log.Warning("Internet|Listener: Failed to listen on ", address, ":", port)
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return nil, err
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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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v.accepting = false
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v.listener.Close()
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}
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func (v *TCPHub) start() {
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v.accepting = true
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for v.accepting {
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var newConn Connection
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err := retry.ExponentialBackoff(10, 200).On(func() error {
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if !v.accepting {
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return nil
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}
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conn, err := v.listener.Accept()
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if err != nil {
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if v.accepting {
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log.Warning("Internet|Listener: Failed to accept new TCP connection: ", err)
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}
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return err
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}
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newConn = conn
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return nil
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})
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if err == nil && 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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