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139 lines
3.3 KiB
139 lines
3.3 KiB
package dokodemo
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import (
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"io"
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"net"
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"sync"
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"github.com/v2ray/v2ray-core/app"
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"github.com/v2ray/v2ray-core/common/alloc"
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"github.com/v2ray/v2ray-core/common/log"
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v2net "github.com/v2ray/v2ray-core/common/net"
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"github.com/v2ray/v2ray-core/common/retry"
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)
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type DokodemoDoor struct {
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config Config
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accepting bool
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address v2net.Address
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space *app.Space
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}
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func NewDokodemoDoor(space *app.Space, config Config) *DokodemoDoor {
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return &DokodemoDoor{
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config: config,
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space: space,
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address: config.Address(),
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}
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}
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func (this *DokodemoDoor) Listen(port v2net.Port) error {
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this.accepting = true
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if this.config.Network().HasNetwork(v2net.TCPNetwork) {
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err := this.ListenTCP(port)
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if err != nil {
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return err
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}
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}
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if this.config.Network().HasNetwork(v2net.UDPNetwork) {
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err := this.ListenUDP(port)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func (this *DokodemoDoor) ListenUDP(port v2net.Port) error {
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udpConn, err := net.ListenUDP("udp", &net.UDPAddr{
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IP: []byte{0, 0, 0, 0},
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Port: int(port),
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Zone: "",
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})
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if err != nil {
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log.Error("Dokodemo failed to listen on port %d: %v", port, err)
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return err
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}
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go this.handleUDPPackets(udpConn)
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return nil
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}
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func (this *DokodemoDoor) handleUDPPackets(udpConn *net.UDPConn) {
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defer udpConn.Close()
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for this.accepting {
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buffer := alloc.NewBuffer()
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nBytes, addr, err := udpConn.ReadFromUDP(buffer.Value)
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buffer.Slice(0, nBytes)
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if err != nil {
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buffer.Release()
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log.Error("Dokodemo failed to read from UDP: %v", err)
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return
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}
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packet := v2net.NewPacket(v2net.NewUDPDestination(this.address), buffer, false)
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ray := this.space.PacketDispatcher().DispatchToOutbound(packet)
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close(ray.InboundInput())
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for payload := range ray.InboundOutput() {
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udpConn.WriteToUDP(payload.Value, addr)
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}
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}
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}
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func (this *DokodemoDoor) ListenTCP(port v2net.Port) error {
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tcpListener, err := net.ListenTCP("tcp", &net.TCPAddr{
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IP: []byte{0, 0, 0, 0},
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Port: int(port),
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Zone: "",
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})
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if err != nil {
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log.Error("Dokodemo failed to listen on port %d: %v", port, err)
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return err
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}
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go this.AcceptTCPConnections(tcpListener)
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return nil
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}
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func (this *DokodemoDoor) AcceptTCPConnections(tcpListener *net.TCPListener) {
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for this.accepting {
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retry.Timed(100, 100).On(func() error {
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connection, err := tcpListener.AcceptTCP()
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if err != nil {
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log.Error("Dokodemo failed to accept new connections: %v", err)
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return err
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}
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go this.HandleTCPConnection(connection)
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return nil
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})
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}
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}
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func (this *DokodemoDoor) HandleTCPConnection(conn *net.TCPConn) {
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defer conn.Close()
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packet := v2net.NewPacket(v2net.NewTCPDestination(this.address), nil, true)
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ray := this.space.PacketDispatcher().DispatchToOutbound(packet)
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var inputFinish, outputFinish sync.Mutex
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inputFinish.Lock()
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outputFinish.Lock()
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reader := v2net.NewTimeOutReader(this.config.Timeout(), conn)
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go dumpInput(reader, ray.InboundInput(), &inputFinish)
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go dumpOutput(conn, ray.InboundOutput(), &outputFinish)
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outputFinish.Lock()
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}
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func dumpInput(reader io.Reader, input chan<- *alloc.Buffer, finish *sync.Mutex) {
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v2net.ReaderToChan(input, reader)
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finish.Unlock()
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close(input)
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}
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func dumpOutput(writer io.Writer, output <-chan *alloc.Buffer, finish *sync.Mutex) {
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v2net.ChanToWriter(writer, output)
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finish.Unlock()
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}
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