mirror of https://github.com/v2fly/v2ray-core.git
95 lines
2.1 KiB
Go
95 lines
2.1 KiB
Go
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/app/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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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(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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RecvOrigDest bool
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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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options := ListenOptions{
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Stream: settings,
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}
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protocol := settings.GetEffectiveProtocol()
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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(address, port, options)
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if err != nil {
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return nil, errors.Base(err).Message("Interent|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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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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