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dokodemo.go
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dokodemo.go
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package dokodemo
import (
"sync"
"github.com/v2ray/v2ray-core/app/dispatcher"
"github.com/v2ray/v2ray-core/common/alloc"
v2io "github.com/v2ray/v2ray-core/common/io"
"github.com/v2ray/v2ray-core/common/log"
v2net "github.com/v2ray/v2ray-core/common/net"
"github.com/v2ray/v2ray-core/proxy"
"github.com/v2ray/v2ray-core/transport/hub"
)
type DokodemoDoor struct {
tcpMutex sync.RWMutex
udpMutex sync.RWMutex
config *Config
accepting bool
address v2net.Address
port v2net.Port
packetDispatcher dispatcher.PacketDispatcher
tcpListener *hub.TCPHub
udpHub *hub.UDPHub
udpServer *hub.UDPServer
listeningPort v2net.Port
}
func NewDokodemoDoor(config *Config, packetDispatcher dispatcher.PacketDispatcher) *DokodemoDoor {
return &DokodemoDoor{
config: config,
packetDispatcher: packetDispatcher,
address: config.Address,
port: config.Port,
}
}
func (this *DokodemoDoor) Port() v2net.Port {
return this.listeningPort
}
func (this *DokodemoDoor) Close() {
this.accepting = false
if this.tcpListener != nil {
this.tcpMutex.Lock()
this.tcpListener.Close()
this.tcpListener = nil
this.tcpMutex.Unlock()
}
if this.udpHub != nil {
this.udpMutex.Lock()
this.udpHub.Close()
this.udpHub = nil
this.udpMutex.Unlock()
}
}
func (this *DokodemoDoor) Listen(port v2net.Port) error {
if this.accepting {
if this.listeningPort == port {
return nil
} else {
return proxy.ErrorAlreadyListening
}
}
this.listeningPort = port
this.accepting = true
if this.config.Network.HasNetwork(v2net.TCPNetwork) {
err := this.ListenTCP(port)
if err != nil {
return err
}
}
if this.config.Network.HasNetwork(v2net.UDPNetwork) {
err := this.ListenUDP(port)
if err != nil {
return err
}
}
return nil
}
func (this *DokodemoDoor) ListenUDP(port v2net.Port) error {
this.udpServer = hub.NewUDPServer(this.packetDispatcher)
udpHub, err := hub.ListenUDP(port, this.handleUDPPackets)
if err != nil {
log.Error("Dokodemo failed to listen on port ", port, ": ", err)
return err
}
this.udpMutex.Lock()
this.udpHub = udpHub
this.udpMutex.Unlock()
return nil
}
func (this *DokodemoDoor) handleUDPPackets(payload *alloc.Buffer, dest v2net.Destination) {
this.udpServer.Dispatch(dest, v2net.UDPDestination(this.address, this.port), payload, func(destination v2net.Destination, payload *alloc.Buffer) {
defer payload.Release()
this.udpMutex.RLock()
defer this.udpMutex.RUnlock()
if !this.accepting {
return
}
this.udpHub.WriteTo(payload.Value, destination)
})
}
func (this *DokodemoDoor) ListenTCP(port v2net.Port) error {
tcpListener, err := hub.ListenTCP(port, this.HandleTCPConnection, nil)
if err != nil {
log.Error("Dokodemo: Failed to listen on port ", port, ": ", err)
return err
}
this.tcpMutex.Lock()
this.tcpListener = tcpListener
this.tcpMutex.Unlock()
return nil
}
func (this *DokodemoDoor) HandleTCPConnection(conn *hub.Connection) {
defer conn.Close()
ray := this.packetDispatcher.DispatchToOutbound(v2net.TCPDestination(this.address, this.port))
defer ray.InboundOutput().Release()
var inputFinish, outputFinish sync.Mutex
inputFinish.Lock()
outputFinish.Lock()
reader := v2net.NewTimeOutReader(this.config.Timeout, conn)
defer reader.Release()
go func() {
v2reader := v2io.NewAdaptiveReader(reader)
defer v2reader.Release()
v2io.Pipe(v2reader, ray.InboundInput())
inputFinish.Unlock()
ray.InboundInput().Close()
}()
go func() {
v2writer := v2io.NewAdaptiveWriter(conn)
defer v2writer.Release()
v2io.Pipe(ray.InboundOutput(), v2writer)
outputFinish.Unlock()
}()
outputFinish.Lock()
inputFinish.Lock()
}