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mirror of https://github.com/v2fly/v2ray-core.git synced 2024-12-22 18:17:52 -05:00
v2fly/transport/internet/tcp_hub.go
2016-12-04 09:10:47 +01:00

101 lines
2.1 KiB
Go

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