func (v *Server) transport(ctx context.Context, reader io.Reader, writer io.Writer) error {
ray := v.packetDispatcher.DispatchToOutbound(ctx)
input := ray.InboundInput()
output := ray.InboundOutput()
requestDone := signal.ExecuteAsync(func() error {
defer input.Close()
v2reader := buf.NewReader(reader)
if err := buf.PipeUntilEOF(v2reader, input); err != nil {
log.Info("Socks|Server: Failed to transport all TCP request: ", err)
return err
}
return nil
})
responseDone := signal.ExecuteAsync(func() error {
v2writer := buf.NewWriter(writer)
if err := buf.PipeUntilEOF(output, v2writer); err != nil {
log.Info("Socks|Server: Failed to transport all TCP response: ", err)
return err
}
return nil
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("Socks|Server: Connection ends with ", err)
input.CloseError()
output.CloseError()
return err
}
return nil
}
func (s *Server) handlePlainHTTP(ctx context.Context, request *http.Request, reader io.Reader, writer io.Writer) error {
if len(request.URL.Host) <= 0 {
response := generateResponse(400, "Bad Request")
return response.Write(writer)
}
request.Host = request.URL.Host
StripHopByHopHeaders(request)
ray := s.packetDispatcher.DispatchToOutbound(ctx)
input := ray.InboundInput()
output := ray.InboundOutput()
requestDone := signal.ExecuteAsync(func() error {
defer input.Close()
requestWriter := bufio.NewWriter(buf.NewBytesWriter(ray.InboundInput()))
err := request.Write(requestWriter)
if err != nil {
return err
}
if err := requestWriter.Flush(); err != nil {
return err
}
return nil
})
responseDone := signal.ExecuteAsync(func() error {
responseReader := bufio.OriginalReader(buf.NewBytesReader(ray.InboundOutput()))
response, err := http.ReadResponse(responseReader, request)
if err != nil {
log.Warning("HTTP: Failed to read response: ", err)
response = generateResponse(503, "Service Unavailable")
}
responseWriter := bufio.NewWriter(writer)
if err := response.Write(responseWriter); err != nil {
return err
}
if err := responseWriter.Flush(); err != nil {
return err
}
return nil
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("HTTP|Server: Connecton ending with ", err)
input.CloseError()
output.CloseError()
return err
}
return nil
}
func (s *Server) handleConnect(ctx context.Context, request *http.Request, reader io.Reader, writer io.Writer) error {
response := &http.Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Header: http.Header(make(map[string][]string)),
Body: nil,
ContentLength: 0,
Close: false,
}
if err := response.Write(writer); err != nil {
log.Warning("HTTP|Server: failed to write back OK response: ", err)
return err
}
ray := s.packetDispatcher.DispatchToOutbound(ctx)
requestDone := signal.ExecuteAsync(func() error {
defer ray.InboundInput().Close()
v2reader := buf.NewReader(reader)
if err := buf.PipeUntilEOF(v2reader, ray.InboundInput()); err != nil {
return err
}
return nil
})
responseDone := signal.ExecuteAsync(func() error {
v2writer := buf.NewWriter(writer)
if err := buf.PipeUntilEOF(ray.InboundOutput(), v2writer); err != nil {
return err
}
return nil
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("HTTP|Server: Connection ends with: ", err)
ray.InboundInput().CloseError()
ray.InboundOutput().CloseError()
return err
}
return nil
}
func (d *DokodemoDoor) Process(ctx context.Context, network net.Network, conn internet.Connection) error {
log.Debug("Dokodemo: processing connection from: ", conn.RemoteAddr())
conn.SetReusable(false)
ctx = proxy.ContextWithDestination(ctx, net.Destination{
Network: network,
Address: d.address,
Port: d.port,
})
inboundRay := d.packetDispatcher.DispatchToOutbound(ctx)
requestDone := signal.ExecuteAsync(func() error {
defer inboundRay.InboundInput().Close()
timedReader := net.NewTimeOutReader(d.config.Timeout, conn)
chunkReader := buf.NewReader(timedReader)
if err := buf.PipeUntilEOF(chunkReader, inboundRay.InboundInput()); err != nil {
log.Info("Dokodemo: Failed to transport request: ", err)
return err
}
return nil
})
responseDone := signal.ExecuteAsync(func() error {
v2writer := buf.NewWriter(conn)
if err := buf.PipeUntilEOF(inboundRay.InboundOutput(), v2writer); err != nil {
log.Info("Dokodemo: Failed to transport response: ", err)
return err
}
return nil
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
inboundRay.InboundInput().CloseError()
inboundRay.InboundOutput().CloseError()
log.Info("Dokodemo: Connection ends with ", err)
return err
}
return nil
}
func (v *VMessInboundHandler) Process(ctx context.Context, network net.Network, connection internet.Connection) error {
connReader := net.NewTimeOutReader(8, connection)
reader := bufio.NewReader(connReader)
session := encoding.NewServerSession(v.clients)
request, err := session.DecodeRequestHeader(reader)
if err != nil {
if errors.Cause(err) != io.EOF {
log.Access(connection.RemoteAddr(), "", log.AccessRejected, err)
log.Info("VMess|Inbound: Invalid request from ", connection.RemoteAddr(), ": ", err)
}
connection.SetReusable(false)
return err
}
log.Access(connection.RemoteAddr(), request.Destination(), log.AccessAccepted, "")
log.Info("VMess|Inbound: Received request for ", request.Destination())
connection.SetReusable(request.Option.Has(protocol.RequestOptionConnectionReuse))
ctx = proxy.ContextWithDestination(ctx, request.Destination())
ctx = protocol.ContextWithUser(ctx, request.User)
ray := v.packetDispatcher.DispatchToOutbound(ctx)
input := ray.InboundInput()
output := ray.InboundOutput()
userSettings := request.User.GetSettings()
connReader.SetTimeOut(userSettings.PayloadReadTimeout)
reader.SetBuffered(false)
requestDone := signal.ExecuteAsync(func() error {
return transferRequest(session, request, reader, input)
})
writer := bufio.NewWriter(connection)
response := &protocol.ResponseHeader{
Command: v.generateCommand(ctx, request),
}
if connection.Reusable() {
response.Option.Set(protocol.ResponseOptionConnectionReuse)
}
responseDone := signal.ExecuteAsync(func() error {
return transferResponse(session, request, response, output, writer)
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("VMess|Inbound: Connection ending with ", err)
connection.SetReusable(false)
input.CloseError()
output.CloseError()
return err
}
if err := writer.Flush(); err != nil {
log.Info("VMess|Inbound: Failed to flush remain data: ", err)
connection.SetReusable(false)
return err
}
return nil
}
func (s *Server) handleConnection(ctx context.Context, conn internet.Connection) error {
conn.SetReusable(false)
timedReader := net.NewTimeOutReader(16, conn)
bufferedReader := bufio.NewReader(timedReader)
request, bodyReader, err := ReadTCPSession(s.user, bufferedReader)
if err != nil {
log.Access(conn.RemoteAddr(), "", log.AccessRejected, err)
log.Info("Shadowsocks|Server: Failed to create request from: ", conn.RemoteAddr(), ": ", err)
return err
}
bufferedReader.SetBuffered(false)
userSettings := s.user.GetSettings()
timedReader.SetTimeOut(userSettings.PayloadReadTimeout)
dest := request.Destination()
log.Access(conn.RemoteAddr(), dest, log.AccessAccepted, "")
log.Info("Shadowsocks|Server: Tunnelling request to ", dest)
ctx = proxy.ContextWithDestination(ctx, dest)
ctx = protocol.ContextWithUser(ctx, request.User)
ray := s.packetDispatcher.DispatchToOutbound(ctx)
requestDone := signal.ExecuteAsync(func() error {
bufferedWriter := bufio.NewWriter(conn)
responseWriter, err := WriteTCPResponse(request, bufferedWriter)
if err != nil {
log.Warning("Shadowsocks|Server: Failed to write response: ", err)
return err
}
payload, err := ray.InboundOutput().Read()
if err != nil {
return err
}
if err := responseWriter.Write(payload); err != nil {
return err
}
payload.Release()
if err := bufferedWriter.SetBuffered(false); err != nil {
return err
}
if err := buf.PipeUntilEOF(ray.InboundOutput(), responseWriter); err != nil {
log.Info("Shadowsocks|Server: Failed to transport all TCP response: ", err)
return err
}
return nil
})
responseDone := signal.ExecuteAsync(func() error {
defer ray.InboundInput().Close()
if err := buf.PipeUntilEOF(bodyReader, ray.InboundInput()); err != nil {
log.Info("Shadowsocks|Server: Failed to transport all TCP request: ", err)
return err
}
return nil
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("Shadowsocks|Server: Connection ends with ", err)
ray.InboundInput().CloseError()
ray.InboundOutput().CloseError()
return err
}
return nil
}
// Process implements OutboundHandler.Process().
func (v *Client) Process(ctx context.Context, outboundRay ray.OutboundRay) error {
destination := proxy.DestinationFromContext(ctx)
network := destination.Network
var server *protocol.ServerSpec
var conn internet.Connection
dialer := proxy.DialerFromContext(ctx)
err := retry.ExponentialBackoff(5, 100).On(func() error {
server = v.serverPicker.PickServer()
dest := server.Destination()
dest.Network = network
rawConn, err := dialer.Dial(ctx, dest)
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
log.Warning("Shadowsocks|Client: Failed to find an available destination:", err)
return err
}
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 == net.Network_TCP {
request.Command = protocol.RequestCommandTCP
} else {
request.Command = protocol.RequestCommandUDP
}
user := server.PickUser()
rawAccount, err := user.GetTypedAccount()
if err != nil {
log.Warning("Shadowsocks|Client: Failed to get a valid user account: ", err)
return err
}
account := rawAccount.(*ShadowsocksAccount)
request.User = user
if account.OneTimeAuth == Account_Auto || account.OneTimeAuth == Account_Enabled {
request.Option |= RequestOptionOneTimeAuth
}
if request.Command == protocol.RequestCommandTCP {
bufferedWriter := bufio.NewWriter(conn)
bodyWriter, err := WriteTCPRequest(request, bufferedWriter)
if err != nil {
log.Info("Shadowsocks|Client: Failed to write request: ", err)
return err
}
bufferedWriter.SetBuffered(false)
requestDone := signal.ExecuteAsync(func() error {
if err := buf.PipeUntilEOF(outboundRay.OutboundInput(), bodyWriter); err != nil {
return err
}
return nil
})
responseDone := signal.ExecuteAsync(func() error {
defer outboundRay.OutboundOutput().Close()
responseReader, err := ReadTCPResponse(user, conn)
if err != nil {
return err
}
if err := buf.PipeUntilEOF(responseReader, outboundRay.OutboundOutput()); err != nil {
return err
}
return nil
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("Shadowsocks|Client: Connection ends with ", err)
outboundRay.OutboundInput().CloseError()
outboundRay.OutboundOutput().CloseError()
return err
}
return nil
}
if request.Command == protocol.RequestCommandUDP {
writer := &UDPWriter{
Writer: conn,
Request: request,
}
requestDone := signal.ExecuteAsync(func() error {
if err := buf.PipeUntilEOF(outboundRay.OutboundInput(), writer); err != nil {
log.Info("Shadowsocks|Client: Failed to transport all UDP request: ", err)
return err
}
return nil
})
timedReader := net.NewTimeOutReader(16, conn)
responseDone := signal.ExecuteAsync(func() error {
defer outboundRay.OutboundOutput().Close()
reader := &UDPReader{
Reader: timedReader,
User: user,
}
if err := buf.PipeUntilEOF(reader, outboundRay.OutboundOutput()); err != nil {
log.Info("Shadowsocks|Client: Failed to transport all UDP response: ", err)
return err
}
return nil
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("Shadowsocks|Client: Connection ends with ", err)
outboundRay.OutboundInput().CloseError()
outboundRay.OutboundOutput().CloseError()
return err
}
return nil
}
return nil
}
func (v *Handler) Process(ctx context.Context, outboundRay ray.OutboundRay) error {
destination := proxy.DestinationFromContext(ctx)
if v.destOverride != nil {
server := v.destOverride.Server
destination = net.Destination{
Network: destination.Network,
Address: server.Address.AsAddress(),
Port: net.Port(server.Port),
}
}
log.Info("Freedom: Opening connection to ", destination)
input := outboundRay.OutboundInput()
output := outboundRay.OutboundOutput()
var conn internet.Connection
if v.domainStrategy == Config_USE_IP && destination.Address.Family().IsDomain() {
destination = v.ResolveIP(destination)
}
dialer := proxy.DialerFromContext(ctx)
err := retry.ExponentialBackoff(5, 100).On(func() error {
rawConn, err := dialer.Dial(ctx, destination)
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()
conn.SetReusable(false)
requestDone := signal.ExecuteAsync(func() error {
v2writer := buf.NewWriter(conn)
if err := buf.PipeUntilEOF(input, v2writer); err != nil {
return err
}
return nil
})
var reader io.Reader = conn
timeout := v.timeout
if destination.Network == net.Network_UDP {
timeout = 16
}
if timeout > 0 {
reader = net.NewTimeOutReader(timeout /* seconds */, conn)
}
responseDone := signal.ExecuteAsync(func() error {
defer output.Close()
v2reader := buf.NewReader(reader)
if err := buf.PipeUntilEOF(v2reader, output); err != nil {
return err
}
return nil
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("Freedom: Connection ending with ", err)
input.CloseError()
output.CloseError()
return err
}
return nil
}
// Dispatch implements OutboundHandler.Dispatch().
func (v *VMessOutboundHandler) Process(ctx context.Context, outboundRay ray.OutboundRay) error {
var rec *protocol.ServerSpec
var conn internet.Connection
dialer := proxy.DialerFromContext(ctx)
err := retry.ExponentialBackoff(5, 100).On(func() error {
rec = v.serverPicker.PickServer()
rawConn, err := dialer.Dial(ctx, rec.Destination())
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
log.Warning("VMess|Outbound: Failed to find an available destination:", err)
return err
}
defer conn.Close()
target := proxy.DestinationFromContext(ctx)
log.Info("VMess|Outbound: Tunneling request to ", target, " via ", rec.Destination())
command := protocol.RequestCommandTCP
if target.Network == net.Network_UDP {
command = protocol.RequestCommandUDP
}
request := &protocol.RequestHeader{
Version: encoding.Version,
User: rec.PickUser(),
Command: command,
Address: target.Address,
Port: target.Port,
Option: protocol.RequestOptionChunkStream,
}
rawAccount, err := request.User.GetTypedAccount()
if err != nil {
log.Warning("VMess|Outbound: Failed to get user account: ", err)
return err
}
account := rawAccount.(*vmess.InternalAccount)
request.Security = account.Security
conn.SetReusable(true)
if conn.Reusable() { // Conn reuse may be disabled on transportation layer
request.Option.Set(protocol.RequestOptionConnectionReuse)
}
input := outboundRay.OutboundInput()
output := outboundRay.OutboundOutput()
session := encoding.NewClientSession(protocol.DefaultIDHash)
requestDone := signal.ExecuteAsync(func() error {
writer := bufio.NewWriter(conn)
session.EncodeRequestHeader(request, writer)
bodyWriter := session.EncodeRequestBody(request, writer)
firstPayload, err := input.ReadTimeout(time.Millisecond * 500)
if err != nil && err != ray.ErrReadTimeout {
return errors.Base(err).Message("VMess|Outbound: Failed to get first payload.")
}
if !firstPayload.IsEmpty() {
if err := bodyWriter.Write(firstPayload); err != nil {
return errors.Base(err).Message("VMess|Outbound: Failed to write first payload.")
}
firstPayload.Release()
}
writer.SetBuffered(false)
if err := buf.PipeUntilEOF(input, bodyWriter); err != nil {
return err
}
if request.Option.Has(protocol.RequestOptionChunkStream) {
if err := bodyWriter.Write(buf.NewLocal(8)); err != nil {
return err
}
}
return nil
})
responseDone := signal.ExecuteAsync(func() error {
defer output.Close()
reader := bufio.NewReader(conn)
header, err := session.DecodeResponseHeader(reader)
if err != nil {
return err
}
v.handleCommand(rec.Destination(), header.Command)
conn.SetReusable(header.Option.Has(protocol.ResponseOptionConnectionReuse))
reader.SetBuffered(false)
bodyReader := session.DecodeResponseBody(request, reader)
if err := buf.PipeUntilEOF(bodyReader, output); err != nil {
return err
}
return nil
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("VMess|Outbound: Connection ending with ", err)
conn.SetReusable(false)
input.CloseError()
output.CloseError()
return err
}
return nil
}
func (c *Client) Process(ctx context.Context, ray ray.OutboundRay) error {
destination := proxy.DestinationFromContext(ctx)
var server *protocol.ServerSpec
var conn internet.Connection
dialer := proxy.DialerFromContext(ctx)
err := retry.ExponentialBackoff(5, 100).On(func() error {
server = c.serverPicker.PickServer()
dest := server.Destination()
rawConn, err := dialer.Dial(ctx, dest)
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
log.Warning("Socks|Client: Failed to find an available destination.")
return err
}
defer conn.Close()
conn.SetReusable(false)
request := &protocol.RequestHeader{
Version: socks5Version,
Command: protocol.RequestCommandTCP,
Address: destination.Address,
Port: destination.Port,
}
if destination.Network == net.Network_UDP {
request.Command = protocol.RequestCommandUDP
}
user := server.PickUser()
if user != nil {
request.User = user
}
udpRequest, err := ClientHandshake(request, conn, conn)
if err != nil {
log.Warning("Socks|Client: Failed to establish connection to server: ", err)
return err
}
var requestFunc func() error
var responseFunc func() error
if request.Command == protocol.RequestCommandTCP {
requestFunc = func() error {
return buf.PipeUntilEOF(ray.OutboundInput(), buf.NewWriter(conn))
}
responseFunc = func() error {
defer ray.OutboundOutput().Close()
return buf.PipeUntilEOF(buf.NewReader(conn), ray.OutboundOutput())
}
} else if request.Command == protocol.RequestCommandUDP {
udpConn, err := dialer.Dial(ctx, udpRequest.Destination())
if err != nil {
log.Info("Socks|Client: Failed to create UDP connection: ", err)
return err
}
defer udpConn.Close()
requestFunc = func() error {
return buf.PipeUntilEOF(ray.OutboundInput(), &UDPWriter{request: request, writer: udpConn})
}
responseFunc = func() error {
defer ray.OutboundOutput().Close()
reader := &UDPReader{reader: net.NewTimeOutReader(16, udpConn)}
return buf.PipeUntilEOF(reader, ray.OutboundOutput())
}
}
requestDone := signal.ExecuteAsync(requestFunc)
responseDone := signal.ExecuteAsync(responseFunc)
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("Socks|Client: Connection ends with ", err)
ray.OutboundInput().CloseError()
ray.OutboundOutput().CloseError()
return err
}
return nil
}