func (handler *VMessOutboundHandler) startCommunicate(request *vmessio.VMessRequest, dest v2net.Address, ray core.OutboundRay) error {
conn, err := net.DialTCP("tcp", nil, &net.TCPAddr{dest.IP, int(dest.Port), ""})
log.Debug("VMessOutbound dialing tcp: %s", dest.String())
if err != nil {
log.Error("Failed to open tcp (%s): %v", dest.String(), err)
return err
}
defer conn.Close()
input := ray.OutboundInput()
output := ray.OutboundOutput()
requestWriter := vmessio.NewVMessRequestWriter()
err = requestWriter.Write(conn, request)
if err != nil {
log.Error("Failed to write VMess request: %v", err)
close(output)
return err
}
requestKey := request.RequestKey[:]
requestIV := request.RequestIV[:]
responseKey := md5.Sum(requestKey)
responseIV := md5.Sum(requestIV)
response := vmessio.VMessResponse{}
nBytes, err := conn.Read(response[:])
if err != nil {
close(output)
log.Error("Failed to read VMess response (%d bytes): %v", nBytes, err)
return err
}
log.Debug("Got response %v", response)
// TODO: check response
encryptRequestWriter, err := v2io.NewAesEncryptWriter(requestKey, requestIV, conn)
if err != nil {
close(output)
log.Error("Failed to create encrypt writer: %v", err)
return err
}
decryptResponseReader, err := v2io.NewAesDecryptReader(responseKey[:], responseIV[:], conn)
if err != nil {
close(output)
log.Error("Failed to create decrypt reader: %v", err)
return err
}
readFinish := make(chan bool)
writeFinish := make(chan bool)
go handler.dumpInput(encryptRequestWriter, input, readFinish)
go handler.dumpOutput(decryptResponseReader, output, writeFinish)
<-readFinish
conn.CloseWrite()
log.Debug("VMessOut closing write")
<-writeFinish
return nil
}
func handleResponse(conn *net.TCPConn, request *vmessio.VMessRequest, output chan<- []byte, finish chan<- bool) {
defer close(finish)
defer close(output)
responseKey := md5.Sum(request.RequestKey[:])
responseIV := md5.Sum(request.RequestIV[:])
decryptResponseReader, err := v2io.NewAesDecryptReader(responseKey[:], responseIV[:], conn)
if err != nil {
log.Error("VMessOut: Failed to create decrypt reader: %v", err)
return
}
response := vmessio.VMessResponse{}
nBytes, err := decryptResponseReader.Read(response[:])
if err != nil {
log.Error("VMessOut: Failed to read VMess response (%d bytes): %v", nBytes, err)
return
}
if !bytes.Equal(response[:], request.ResponseHeader[:]) {
log.Warning("VMessOut: unexepcted response header. The connection is probably hijacked.")
return
}
v2net.ReaderToChan(output, decryptResponseReader)
return
}
func handleInput(request *vmessio.VMessRequest, reader io.Reader, input chan<- []byte, finish chan<- bool) {
defer close(input)
defer close(finish)
requestReader, err := v2io.NewAesDecryptReader(request.RequestKey[:], request.RequestIV[:], reader)
if err != nil {
log.Error("Failed to create decrypt reader: %v", err)
return
}
v2net.ReaderToChan(input, requestReader)
}
func (handler *VMessInboundHandler) HandleConnection(connection net.Conn) error {
defer connection.Close()
reader := vmessio.NewVMessRequestReader(handler.clients)
request, err := reader.Read(connection)
if err != nil {
log.Debug("Failed to parse VMess request: %v", err)
return err
}
log.Debug("Received request for %s", request.Address.String())
response := vmessio.NewVMessResponse(request)
nBytes, err := connection.Write(response[:])
if err != nil {
return log.Error("Failed to write VMess response (%d bytes): %v", nBytes, err)
}
requestKey := request.RequestKey[:]
requestIV := request.RequestIV[:]
responseKey := md5.Sum(requestKey)
responseIV := md5.Sum(requestIV)
requestReader, err := v2io.NewAesDecryptReader(requestKey, requestIV, connection)
if err != nil {
return log.Error("Failed to create decrypt reader: %v", err)
}
responseWriter, err := v2io.NewAesEncryptWriter(responseKey[:], responseIV[:], connection)
if err != nil {
return log.Error("Failed to create encrypt writer: %v", err)
}
ray := handler.vPoint.NewInboundConnectionAccepted(request.Address)
input := ray.InboundInput()
output := ray.InboundOutput()
readFinish := make(chan bool)
writeFinish := make(chan bool)
go handler.dumpInput(requestReader, input, readFinish)
go handler.dumpOutput(responseWriter, output, writeFinish)
<-writeFinish
if tcpConn, ok := connection.(*net.TCPConn); ok {
log.Debug("VMessIn closing write")
tcpConn.CloseWrite()
}
<-readFinish
return nil
}
func (handler *VMessOutboundHandler) Start(ray core.OutboundVRay) error {
vNextAddress, vNextUser := handler.pickVNext()
request := new(vmessio.VMessRequest)
request.Version = vmessio.Version
request.UserId = vNextUser.Id
rand.Read(request.RequestIV[:])
rand.Read(request.RequestKey[:])
rand.Read(request.ResponseHeader[:])
request.Command = byte(0x01)
request.Address = handler.dest
conn, err := net.Dial("tcp", vNextAddress.String())
if err != nil {
return err
}
defer conn.Close()
requestWriter := vmessio.NewVMessRequestWriter()
requestWriter.Write(conn, request)
requestKey := request.RequestKey[:]
requestIV := request.RequestIV[:]
responseKey := md5.Sum(requestKey)
responseIV := md5.Sum(requestIV)
encryptRequestWriter, err := v2io.NewAesEncryptWriter(requestKey, requestIV, conn)
if err != nil {
return err
}
responseReader, err := v2io.NewAesDecryptReader(responseKey[:], responseIV[:], conn)
if err != nil {
return err
}
input := ray.OutboundInput()
output := ray.OutboundOutput()
finish := make(chan bool, 2)
go handler.dumpInput(encryptRequestWriter, input, finish)
go handler.dumpOutput(responseReader, output, finish)
handler.waitForFinish(finish)
return nil
}
func (handler *VMessInboundHandler) HandleConnection(connection net.Conn) error {
defer connection.Close()
reader := vmessio.NewVMessRequestReader(handler.clients)
request, err := reader.Read(connection)
if err != nil {
return err
}
log.Debug("Received request for %s", request.Address.String())
response := vmessio.NewVMessResponse(request)
nBytes, err := connection.Write(response[:])
log.Debug("Writing VMess response %v", response)
if err != nil {
return log.Error("Failed to write VMess response (%d bytes): %v", nBytes, err)
}
requestKey := request.RequestKey[:]
requestIV := request.RequestIV[:]
responseKey := md5.Sum(requestKey)
responseIV := md5.Sum(requestIV)
requestReader, err := v2io.NewAesDecryptReader(requestKey, requestIV, connection)
if err != nil {
return log.Error("Failed to create decrypt reader: %v", err)
}
responseWriter, err := v2io.NewAesEncryptWriter(responseKey[:], responseIV[:], connection)
if err != nil {
return log.Error("Failed to create encrypt writer: %v", err)
}
ray := handler.vPoint.NewInboundConnectionAccepted(request.Address)
input := ray.InboundInput()
output := ray.InboundOutput()
finish := make(chan bool, 2)
go handler.dumpInput(requestReader, input, finish)
go handler.dumpOutput(responseWriter, output, finish)
handler.waitForFinish(finish)
return nil
}
func (handler *VMessInboundHandler) HandleConnection(connection net.Conn) error {
defer connection.Close()
reader := vmessio.NewVMessRequestReader(handler.clients)
request, err := reader.Read(connection)
if err != nil {
return err
}
response := vmessio.NewVMessResponse(request)
connection.Write(response[:])
requestKey := request.RequestKey[:]
requestIV := request.RequestIV[:]
responseKey := md5.Sum(requestKey)
responseIV := md5.Sum(requestIV)
requestReader, err := v2io.NewAesDecryptReader(requestKey, requestIV, connection)
if err != nil {
return err
}
responseWriter, err := v2io.NewAesEncryptWriter(responseKey[:], responseIV[:], connection)
if err != nil {
return err
}
ray := handler.vPoint.NewInboundConnectionAccepted(request.Address)
input := ray.InboundInput()
output := ray.InboundOutput()
finish := make(chan bool, 2)
go handler.dumpInput(requestReader, input, finish)
go handler.dumpOutput(responseWriter, output, finish)
handler.waitForFinish(finish)
return nil
}
func handleResponse(conn *net.TCPConn, request *vmessio.VMessRequest, output chan<- []byte, finish chan<- bool) error {
defer close(finish)
responseKey := md5.Sum(request.RequestKey[:])
responseIV := md5.Sum(request.RequestIV[:])
response := vmessio.VMessResponse{}
nBytes, err := conn.Read(response[:])
if err != nil {
log.Error("Failed to read VMess response (%d bytes): %v", nBytes, err)
return err
}
log.Debug("Got response %v", response)
// TODO: check response
decryptResponseReader, err := v2io.NewAesDecryptReader(responseKey[:], responseIV[:], conn)
if err != nil {
log.Error("Failed to create decrypt reader: %v", err)
return err
}
v2net.ReaderToChan(output, decryptResponseReader)
return nil
}