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 handleRequest(conn *net.TCPConn, request *vmessio.VMessRequest, input <-chan []byte, finish chan<- bool) error {
defer close(finish)
requestWriter := vmessio.NewVMessRequestWriter(v2hash.NewTimeHash(v2hash.HMACHash{}), v2math.GenerateRandomInt64InRange)
err := requestWriter.Write(conn, request)
if err != nil {
log.Error("Failed to write VMess request: %v", err)
return err
}
encryptRequestWriter, err := v2io.NewAesEncryptWriter(request.RequestKey[:], request.RequestIV[:], conn)
if err != nil {
log.Error("Failed to create encrypt writer: %v", err)
return err
}
v2net.ChanToWriter(encryptRequestWriter, input)
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
}