func (this *VMessOutboundHandler) handleResponse(session *raw.ClientSession, conn net.Conn, request *proto.RequestHeader, dest v2net.Destination, output chan<- *alloc.Buffer, finish *sync.Mutex) {
defer finish.Unlock()
defer close(output)
reader := v2io.NewBufferedReader(conn)
header, err := session.DecodeResponseHeader(reader)
if err != nil {
log.Warning("VMessOut: Failed to read response: ", err)
return
}
go this.handleCommand(dest, header.Command)
reader.SetCached(false)
decryptReader := session.DecodeResponseBody(conn)
var bodyReader v2io.Reader
if request.Option.IsChunkStream() {
bodyReader = vmessio.NewAuthChunkReader(decryptReader)
} else {
bodyReader = v2io.NewAdaptiveReader(decryptReader)
}
v2io.ReaderToChan(output, bodyReader)
return
}
func (this *Server) transport(reader io.Reader, writer io.Writer, destination v2net.Destination) {
ray := this.packetDispatcher.DispatchToOutbound(destination)
input := ray.InboundInput()
output := ray.InboundOutput()
var inputFinish, outputFinish sync.Mutex
inputFinish.Lock()
outputFinish.Lock()
go func() {
v2reader := v2io.NewAdaptiveReader(reader)
defer v2reader.Release()
v2io.Pipe(v2reader, input)
inputFinish.Unlock()
input.Close()
}()
go func() {
v2writer := v2io.NewAdaptiveWriter(writer)
defer v2writer.Release()
v2io.Pipe(output, v2writer)
outputFinish.Unlock()
output.Release()
}()
outputFinish.Lock()
}
func (this *OutboundConnectionHandler) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
input := ray.OutboundInput()
output := ray.OutboundOutput()
this.Destination = destination
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 *DokodemoDoor) HandleTCPConnection(conn internet.Connection) {
defer conn.Close()
var dest v2net.Destination
if this.config.FollowRedirect {
originalDest := GetOriginalDestination(conn)
if originalDest != nil {
log.Info("Dokodemo: Following redirect to: ", originalDest)
dest = originalDest
}
}
if dest == nil && this.address != nil && this.port > v2net.Port(0) {
dest = v2net.TCPDestination(this.address, this.port)
}
if dest == nil {
log.Info("Dokodemo: Unknown destination, stop forwarding...")
return
}
log.Info("Dokodemo: Handling request to ", dest)
ray := this.packetDispatcher.DispatchToOutbound(dest)
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()
}
func (this *VMessOutboundHandler) handleResponse(conn net.Conn, request *protocol.VMessRequest, dest v2net.Destination, output chan<- *alloc.Buffer, finish *sync.Mutex) {
defer finish.Unlock()
defer close(output)
responseKey := md5.Sum(request.RequestKey[:])
responseIV := md5.Sum(request.RequestIV[:])
aesStream, err := v2crypto.NewAesDecryptionStream(responseKey[:], responseIV[:])
if err != nil {
log.Error("VMessOut: Failed to create AES encryption stream: ", err)
return
}
decryptResponseReader := v2crypto.NewCryptionReader(aesStream, conn)
buffer := alloc.NewSmallBuffer()
defer buffer.Release()
_, err = io.ReadFull(decryptResponseReader, buffer.Value[:4])
if err != nil {
log.Error("VMessOut: Failed to read VMess response (", buffer.Len(), " bytes): ", err)
return
}
if !headerMatch(request, buffer.Value[0]) {
log.Warning("VMessOut: unexepcted response header. The connection is probably hijacked.")
return
}
if buffer.Value[2] != 0 {
command := buffer.Value[2]
dataLen := int(buffer.Value[3])
_, err := io.ReadFull(decryptResponseReader, buffer.Value[:dataLen])
if err != nil {
log.Error("VMessOut: Failed to read response command: ", err)
return
}
data := buffer.Value[:dataLen]
go this.handleCommand(dest, command, data)
}
var reader v2io.Reader
if request.IsChunkStream() {
reader = vmessio.NewAuthChunkReader(decryptResponseReader)
} else {
reader = v2io.NewAdaptiveReader(decryptResponseReader)
}
v2io.ReaderToChan(output, reader)
return
}
func handleInput(request *protocol.VMessRequest, reader io.Reader, input chan<- *alloc.Buffer, finish *sync.Mutex) {
defer close(input)
defer finish.Unlock()
aesStream, err := v2crypto.NewAesDecryptionStream(request.RequestKey, request.RequestIV)
if err != nil {
log.Error("VMessIn: Failed to create AES decryption stream: ", err)
return
}
descriptionReader := v2crypto.NewCryptionReader(aesStream, reader)
var requestReader v2io.Reader
if request.IsChunkStream() {
requestReader = vmessio.NewAuthChunkReader(descriptionReader)
} else {
requestReader = v2io.NewAdaptiveReader(descriptionReader)
}
v2io.ReaderToChan(input, requestReader)
}
func (this *Server) transport(input io.Reader, output io.Writer, ray ray.InboundRay) {
var wg sync.WaitGroup
wg.Add(2)
defer wg.Wait()
go func() {
v2reader := v2io.NewAdaptiveReader(input)
defer v2reader.Release()
v2io.Pipe(v2reader, ray.InboundInput())
ray.InboundInput().Close()
wg.Done()
}()
go func() {
v2writer := v2io.NewAdaptiveWriter(output)
defer v2writer.Release()
v2io.Pipe(ray.InboundOutput(), v2writer)
ray.InboundOutput().Release()
wg.Done()
}()
}
func (this *VMessOutboundHandler) handleResponse(session *encoding.ClientSession, conn internet.Connection, request *protocol.RequestHeader, dest v2net.Destination, output v2io.Writer, finish *sync.Mutex) {
defer finish.Unlock()
reader := v2io.NewBufferedReader(conn)
defer reader.Release()
header, err := session.DecodeResponseHeader(reader)
if err != nil {
conn.SetReusable(false)
log.Warning("VMess|Outbound: Failed to read response from ", request.Destination(), ": ", err)
return
}
go this.handleCommand(dest, header.Command)
if !header.Option.Has(protocol.ResponseOptionConnectionReuse) {
conn.SetReusable(false)
}
reader.SetCached(false)
decryptReader := session.DecodeResponseBody(reader)
var bodyReader v2io.Reader
if request.Option.Has(protocol.RequestOptionChunkStream) {
bodyReader = vmessio.NewAuthChunkReader(decryptReader)
} else {
bodyReader = v2io.NewAdaptiveReader(decryptReader)
}
err = v2io.Pipe(bodyReader, output)
if err != io.EOF {
conn.SetReusable(false)
}
bodyReader.Release()
return
}
func (this *Server) handleConnection(conn internet.Connection) {
defer conn.Close()
buffer := alloc.NewSmallBuffer()
defer buffer.Release()
timedReader := v2net.NewTimeOutReader(16, conn)
defer timedReader.Release()
bufferedReader := v2io.NewBufferedReader(timedReader)
defer bufferedReader.Release()
ivLen := this.config.Cipher.IVSize()
_, err := io.ReadFull(bufferedReader, buffer.Value[:ivLen])
if err != nil {
if err != io.EOF {
log.Access(conn.RemoteAddr(), "", log.AccessRejected, err)
log.Warning("Shadowsocks: Failed to read IV: ", err)
}
return
}
iv := buffer.Value[:ivLen]
key := this.config.Key
stream, err := this.config.Cipher.NewDecodingStream(key, iv)
if err != nil {
log.Error("Shadowsocks: Failed to create decoding stream: ", err)
return
}
reader := crypto.NewCryptionReader(stream, bufferedReader)
request, err := ReadRequest(reader, NewAuthenticator(HeaderKeyGenerator(key, iv)), false)
if err != nil {
log.Access(conn.RemoteAddr(), "", log.AccessRejected, err)
log.Warning("Shadowsocks: Invalid request from ", conn.RemoteAddr(), ": ", err)
return
}
defer request.Release()
bufferedReader.SetCached(false)
userSettings := protocol.GetUserSettings(this.config.Level)
timedReader.SetTimeOut(userSettings.PayloadReadTimeout)
dest := v2net.TCPDestination(request.Address, request.Port)
log.Access(conn.RemoteAddr(), dest, log.AccessAccepted, "")
log.Info("Shadowsocks: Tunnelling request to ", dest)
ray := this.packetDispatcher.DispatchToOutbound(dest)
defer ray.InboundOutput().Release()
var writeFinish sync.Mutex
writeFinish.Lock()
go func() {
if payload, err := ray.InboundOutput().Read(); err == nil {
payload.SliceBack(ivLen)
rand.Read(payload.Value[:ivLen])
stream, err := this.config.Cipher.NewEncodingStream(key, payload.Value[:ivLen])
if err != nil {
log.Error("Shadowsocks: Failed to create encoding stream: ", err)
return
}
stream.XORKeyStream(payload.Value[ivLen:], payload.Value[ivLen:])
conn.Write(payload.Value)
payload.Release()
writer := crypto.NewCryptionWriter(stream, conn)
v2writer := v2io.NewAdaptiveWriter(writer)
v2io.Pipe(ray.InboundOutput(), v2writer)
writer.Release()
v2writer.Release()
}
writeFinish.Unlock()
}()
var payloadReader v2io.Reader
if request.OTA {
payloadAuth := NewAuthenticator(ChunkKeyGenerator(iv))
payloadReader = NewChunkReader(reader, payloadAuth)
} else {
payloadReader = v2io.NewAdaptiveReader(reader)
}
v2io.Pipe(payloadReader, ray.InboundInput())
ray.InboundInput().Close()
payloadReader.Release()
writeFinish.Lock()
}
func (this *Shadowsocks) handleConnection(conn *hub.TCPConn) {
defer conn.Close()
buffer := alloc.NewSmallBuffer()
defer buffer.Release()
_, err := io.ReadFull(conn, buffer.Value[:this.config.Cipher.IVSize()])
if err != nil {
log.Access(conn.RemoteAddr(), serial.StringLiteral(""), log.AccessRejected, serial.StringLiteral(err.Error()))
log.Error("Shadowsocks: Failed to read IV: ", err)
return
}
iv := buffer.Value[:this.config.Cipher.IVSize()]
key := this.config.Key
reader, err := this.config.Cipher.NewDecodingStream(key, iv, conn)
if err != nil {
log.Error("Shadowsocks: Failed to create decoding stream: ", err)
return
}
request, err := ReadRequest(reader, NewAuthenticator(HeaderKeyGenerator(iv, key)), false)
if err != nil {
log.Access(conn.RemoteAddr(), serial.StringLiteral(""), log.AccessRejected, serial.StringLiteral(err.Error()))
log.Warning("Shadowsocks: Invalid request from ", conn.RemoteAddr(), ": ", err)
return
}
dest := v2net.TCPDestination(request.Address, request.Port)
log.Access(conn.RemoteAddr(), dest, log.AccessAccepted, serial.StringLiteral(""))
log.Info("Shadowsocks: Tunnelling request to ", dest)
packet := v2net.NewPacket(dest, nil, true)
ray := this.packetDispatcher.DispatchToOutbound(packet)
var writeFinish sync.Mutex
writeFinish.Lock()
go func() {
if payload, ok := <-ray.InboundOutput(); ok {
payload.SliceBack(16)
rand.Read(payload.Value[:16])
writer, err := this.config.Cipher.NewEncodingStream(key, payload.Value[:16], conn)
if err != nil {
log.Error("Shadowsocks: Failed to create encoding stream: ", err)
return
}
writer.Write(payload.Value)
payload.Release()
v2io.ChanToRawWriter(writer, ray.InboundOutput())
}
writeFinish.Unlock()
}()
var payloadReader v2io.Reader
if request.OTA {
payloadAuth := NewAuthenticator(ChunkKeyGenerator(iv))
payloadReader = NewChunkReader(reader, payloadAuth)
} else {
payloadReader = v2io.NewAdaptiveReader(reader)
}
v2io.ReaderToChan(ray.InboundInput(), payloadReader)
close(ray.InboundInput())
writeFinish.Lock()
}
func (this *VMessInboundHandler) HandleConnection(connection internet.Connection) {
defer connection.Close()
if !this.accepting {
return
}
connReader := v2net.NewTimeOutReader(8, connection)
defer connReader.Release()
reader := v2io.NewBufferedReader(connReader)
defer reader.Release()
this.RLock()
if !this.accepting {
this.RUnlock()
return
}
session := raw.NewServerSession(this.clients)
defer session.Release()
request, err := session.DecodeRequestHeader(reader)
this.RUnlock()
if err != nil {
if err != io.EOF {
log.Access(connection.RemoteAddr(), "", log.AccessRejected, err)
log.Warning("VMessIn: Invalid request from ", connection.RemoteAddr(), ": ", err)
}
connection.SetReusable(false)
return
}
log.Access(connection.RemoteAddr(), request.Destination(), log.AccessAccepted, "")
log.Info("VMessIn: Received request for ", request.Destination())
connection.SetReusable(request.Option.Has(protocol.RequestOptionConnectionReuse))
ray := this.packetDispatcher.DispatchToOutbound(request.Destination())
input := ray.InboundInput()
output := ray.InboundOutput()
defer input.Close()
defer output.Release()
var readFinish sync.Mutex
readFinish.Lock()
userSettings := protocol.GetUserSettings(request.User.Level)
connReader.SetTimeOut(userSettings.PayloadReadTimeout)
reader.SetCached(false)
go func() {
bodyReader := session.DecodeRequestBody(reader)
var requestReader v2io.Reader
if request.Option.Has(protocol.RequestOptionChunkStream) {
requestReader = vmessio.NewAuthChunkReader(bodyReader)
} else {
requestReader = v2io.NewAdaptiveReader(bodyReader)
}
err := v2io.Pipe(requestReader, input)
if err != io.EOF {
connection.SetReusable(false)
}
requestReader.Release()
input.Close()
readFinish.Unlock()
}()
writer := v2io.NewBufferedWriter(connection)
defer writer.Release()
response := &protocol.ResponseHeader{
Command: this.generateCommand(request),
}
if connection.Reusable() {
response.Option.Set(protocol.ResponseOptionConnectionReuse)
}
session.EncodeResponseHeader(response, writer)
bodyWriter := session.EncodeResponseBody(writer)
var v2writer v2io.Writer = v2io.NewAdaptiveWriter(bodyWriter)
if request.Option.Has(protocol.RequestOptionChunkStream) {
v2writer = vmessio.NewAuthChunkWriter(v2writer)
}
// Optimize for small response packet
if data, err := output.Read(); err == nil {
if err := v2writer.Write(data); err != nil {
connection.SetReusable(false)
}
writer.SetCached(false)
err = v2io.Pipe(output, v2writer)
if err != io.EOF {
connection.SetReusable(false)
}
}
output.Release()
if request.Option.Has(protocol.RequestOptionChunkStream) {
if err := v2writer.Write(alloc.NewSmallBuffer().Clear()); err != nil {
connection.SetReusable(false)
}
}
v2writer.Release()
readFinish.Lock()
}
func (this *VMessInboundHandler) HandleConnection(connection *hub.TCPConn) {
defer connection.Close()
connReader := v2net.NewTimeOutReader(16, connection)
reader := v2io.NewBufferedReader(connReader)
session := raw.NewServerSession(this.clients)
request, err := session.DecodeRequestHeader(reader)
if err != nil {
log.Access(connection.RemoteAddr(), serial.StringLiteral(""), log.AccessRejected, serial.StringLiteral(err.Error()))
log.Warning("VMessIn: Invalid request from ", connection.RemoteAddr(), ": ", err)
return
}
log.Access(connection.RemoteAddr(), request.Destination(), log.AccessAccepted, serial.StringLiteral(""))
log.Debug("VMessIn: Received request for ", request.Destination())
ray := this.packetDispatcher.DispatchToOutbound(v2net.NewPacket(request.Destination(), nil, true))
input := ray.InboundInput()
output := ray.InboundOutput()
var readFinish, writeFinish sync.Mutex
readFinish.Lock()
writeFinish.Lock()
userSettings := proto.GetUserSettings(request.User.Level)
connReader.SetTimeOut(userSettings.PayloadReadTimeout)
reader.SetCached(false)
go func() {
defer close(input)
defer readFinish.Unlock()
bodyReader := session.DecodeRequestBody(reader)
var requestReader v2io.Reader
if request.Option.IsChunkStream() {
requestReader = vmessio.NewAuthChunkReader(bodyReader)
} else {
requestReader = v2io.NewAdaptiveReader(bodyReader)
}
v2io.ReaderToChan(input, requestReader)
}()
writer := v2io.NewBufferedWriter(connection)
response := &proto.ResponseHeader{
Command: this.generateCommand(request),
}
session.EncodeResponseHeader(response, writer)
bodyWriter := session.EncodeResponseBody(writer)
// Optimize for small response packet
if data, open := <-output; open {
if request.Option.IsChunkStream() {
vmessio.Authenticate(data)
}
bodyWriter.Write(data.Value)
data.Release()
writer.SetCached(false)
go func(finish *sync.Mutex) {
var writer v2io.Writer = v2io.NewAdaptiveWriter(bodyWriter)
if request.Option.IsChunkStream() {
writer = vmessio.NewAuthChunkWriter(writer)
}
v2io.ChanToWriter(writer, output)
finish.Unlock()
}(&writeFinish)
writeFinish.Lock()
}
connection.CloseWrite()
readFinish.Lock()
}
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 == DomainStrategyUseIP && destination.Address().IsDomain() {
destination = this.ResolveIP(destination)
}
err := retry.Timed(5, 100).On(func() error {
rawConn, err := internet.Dial(this.meta.Address, destination, this.meta.StreamSettings)
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()
var readMutex, writeMutex sync.Mutex
readMutex.Lock()
writeMutex.Lock()
conn.Write(payload.Value)
go func() {
v2writer := v2io.NewAdaptiveWriter(conn)
defer v2writer.Release()
v2io.Pipe(input, v2writer)
writeMutex.Unlock()
}()
go func() {
defer readMutex.Unlock()
var reader io.Reader = conn
timeout := this.timeout
if destination.IsUDP() {
timeout = 16
}
if timeout > 0 {
reader = v2net.NewTimeOutReader(int(timeout) /* seconds */, conn)
}
v2reader := v2io.NewAdaptiveReader(reader)
defer v2reader.Release()
v2io.Pipe(v2reader, output)
ray.OutboundOutput().Close()
}()
writeMutex.Lock()
if tcpConn, ok := conn.(*tcp.RawConnection); ok {
tcpConn.CloseWrite()
}
readMutex.Lock()
return nil
}