func (this *OutboundConnectionHandler) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
input := ray.OutboundInput()
output := ray.OutboundOutput()
this.Destination = destination
if !payload.IsEmpty() {
this.ConnOutput.Write(payload.Value)
}
payload.Release()
writeFinish := &sync.Mutex{}
writeFinish.Lock()
go func() {
v2writer := v2io.NewAdaptiveWriter(this.ConnOutput)
defer v2writer.Release()
v2io.Pipe(input, v2writer)
writeFinish.Unlock()
input.Release()
}()
writeFinish.Lock()
v2reader := v2io.NewAdaptiveReader(this.ConnInput)
defer v2reader.Release()
v2io.Pipe(v2reader, output)
output.Close()
return nil
}
func (this *VMessOutboundHandler) handleRequest(session *encoding.ClientSession, conn internet.Connection, request *protocol.RequestHeader, payload *alloc.Buffer, input v2io.Reader, finish *sync.Mutex) {
defer finish.Unlock()
writer := v2io.NewBufferedWriter(conn)
defer writer.Release()
session.EncodeRequestHeader(request, writer)
bodyWriter := session.EncodeRequestBody(writer)
var streamWriter v2io.Writer = v2io.NewAdaptiveWriter(bodyWriter)
if request.Option.Has(protocol.RequestOptionChunkStream) {
streamWriter = vmessio.NewAuthChunkWriter(streamWriter)
}
if !payload.IsEmpty() {
if err := streamWriter.Write(payload); err != nil {
conn.SetReusable(false)
}
}
writer.SetCached(false)
err := v2io.Pipe(input, streamWriter)
if err != io.EOF {
conn.SetReusable(false)
}
if request.Option.Has(protocol.RequestOptionChunkStream) {
err := streamWriter.Write(alloc.NewLocalBuffer(32).Clear())
if err != nil {
conn.SetReusable(false)
}
}
streamWriter.Release()
return
}
func (this *FreedomConnection) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
log.Info("Freedom: Opening connection to ", destination)
defer payload.Release()
defer ray.OutboundInput().Release()
defer ray.OutboundOutput().Close()
var conn internet.Connection
if this.domainStrategy == Config_USE_IP && destination.Address.Family().IsDomain() {
destination = this.ResolveIP(destination)
}
err := retry.ExponentialBackoff(5, 100).On(func() error {
rawConn, err := internet.Dial(this.meta.Address, destination, this.meta.GetDialerOptions())
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
log.Warning("Freedom: Failed to open connection to ", destination, ": ", err)
return err
}
defer conn.Close()
input := ray.OutboundInput()
output := ray.OutboundOutput()
if !payload.IsEmpty() {
conn.Write(payload.Value)
}
go func() {
v2writer := v2io.NewAdaptiveWriter(conn)
defer v2writer.Release()
v2io.Pipe(input, v2writer)
if tcpConn, ok := conn.(*tcp.RawConnection); ok {
tcpConn.CloseWrite()
}
}()
var reader io.Reader = conn
timeout := this.timeout
if destination.Network == v2net.Network_UDP {
timeout = 16
}
if timeout > 0 {
reader = v2net.NewTimeOutReader(timeout /* seconds */, conn)
}
v2reader := v2io.NewAdaptiveReader(reader)
v2io.Pipe(v2reader, output)
v2reader.Release()
ray.OutboundOutput().Close()
return nil
}
// Write implements Writer.Write(). Write() takes ownership of the given buffer.
func (this *AdaptiveWriter) Write(buffer *alloc.Buffer) error {
defer buffer.Release()
for !buffer.IsEmpty() {
nBytes, err := this.writer.Write(buffer.Value)
if err != nil {
return err
}
buffer.SliceFrom(nBytes)
}
return nil
}
func (this *Client) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
defer payload.Release()
defer ray.OutboundInput().Release()
defer ray.OutboundOutput().Close()
network := destination.Network
var server *protocol.ServerSpec
var conn internet.Connection
err := retry.ExponentialBackoff(5, 100).On(func() error {
server = this.serverPicker.PickServer()
dest := server.Destination()
dest.Network = network
rawConn, err := internet.Dial(this.meta.Address, dest, this.meta.GetDialerOptions())
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
return errors.New("Shadowsocks|Client: Failed to find an available destination:" + err.Error())
}
log.Info("Shadowsocks|Client: Tunneling request to ", destination, " via ", server.Destination())
conn.SetReusable(false)
request := &protocol.RequestHeader{
Version: Version,
Address: destination.Address,
Port: destination.Port,
}
if destination.Network == v2net.Network_TCP {
request.Command = protocol.RequestCommandTCP
} else {
request.Command = protocol.RequestCommandUDP
}
user := server.PickUser()
rawAccount, err := user.GetTypedAccount()
if err != nil {
return errors.New("Shadowsocks|Client: Failed to get a valid user account: " + err.Error())
}
account := rawAccount.(*ShadowsocksAccount)
request.User = user
if account.OneTimeAuth == Account_Auto || account.OneTimeAuth == Account_Enabled {
request.Option |= RequestOptionOneTimeAuth
}
if request.Command == protocol.RequestCommandTCP {
bufferedWriter := v2io.NewBufferedWriter(conn)
defer bufferedWriter.Release()
bodyWriter, err := WriteTCPRequest(request, bufferedWriter)
defer bodyWriter.Release()
if err != nil {
return errors.New("Shadowsock|Client: Failed to write request: " + err.Error())
}
if err := bodyWriter.Write(payload); err != nil {
return errors.New("Shadowsocks|Client: Failed to write payload: " + err.Error())
}
var responseMutex sync.Mutex
responseMutex.Lock()
go func() {
defer responseMutex.Unlock()
responseReader, err := ReadTCPResponse(user, conn)
if err != nil {
log.Warning("Shadowsocks|Client: Failed to read response: " + err.Error())
return
}
v2io.Pipe(responseReader, ray.OutboundOutput())
}()
bufferedWriter.SetCached(false)
v2io.Pipe(ray.OutboundInput(), bodyWriter)
responseMutex.Lock()
}
if request.Command == protocol.RequestCommandUDP {
timedReader := v2net.NewTimeOutReader(16, conn)
var responseMutex sync.Mutex
responseMutex.Lock()
go func() {
defer responseMutex.Unlock()
reader := &UDPReader{
Reader: timedReader,
User: user,
}
v2io.Pipe(reader, ray.OutboundOutput())
}()
writer := &UDPWriter{
Writer: conn,
Request: request,
}
if !payload.IsEmpty() {
if err := writer.Write(payload); err != nil {
return errors.New("Shadowsocks|Client: Failed to write payload: " + err.Error())
}
}
v2io.Pipe(ray.OutboundInput(), writer)
responseMutex.Lock()
}
return nil
}