func (this *ClientSession) DecodeResponseHeader(reader io.Reader) (*protocol.ResponseHeader, error) {
aesStream := crypto.NewAesDecryptionStream(this.responseBodyKey, this.responseBodyIV)
this.responseReader = crypto.NewCryptionReader(aesStream, reader)
buffer := make([]byte, 256)
_, err := io.ReadFull(this.responseReader, buffer[:4])
if err != nil {
log.Info("Raw: Failed to read response header: ", err)
return nil, err
}
if buffer[0] != this.responseHeader {
log.Info("Raw: Unexpected response header. Expecting ", this.responseHeader, " but actually ", buffer[0])
return nil, transport.ErrCorruptedPacket
}
header := &protocol.ResponseHeader{
Option: protocol.ResponseOption(buffer[1]),
}
if buffer[2] != 0 {
cmdId := buffer[2]
dataLen := int(buffer[3])
_, err := io.ReadFull(this.responseReader, buffer[:dataLen])
if err != nil {
log.Info("Raw: Failed to read response command: ", err)
return nil, err
}
data := buffer[:dataLen]
command, err := UnmarshalCommand(cmdId, data)
if err == nil {
header.Command = command
}
}
return header, nil
}
func (v *ClientSession) DecodeResponseHeader(reader io.Reader) (*protocol.ResponseHeader, error) {
aesStream := crypto.NewAesDecryptionStream(v.responseBodyKey, v.responseBodyIV)
v.responseReader = crypto.NewCryptionReader(aesStream, reader)
buffer := make([]byte, 256)
_, err := io.ReadFull(v.responseReader, buffer[:4])
if err != nil {
log.Info("VMess|Client: Failed to read response header: ", err)
return nil, err
}
if buffer[0] != v.responseHeader {
return nil, errors.Format("VMess|Client: Unexpected response header. Expecting %d but actually %d", v.responseHeader, buffer[0])
}
header := &protocol.ResponseHeader{
Option: protocol.ResponseOption(buffer[1]),
}
if buffer[2] != 0 {
cmdID := buffer[2]
dataLen := int(buffer[3])
_, err := io.ReadFull(v.responseReader, buffer[:dataLen])
if err != nil {
log.Info("VMess|Client: Failed to read response command: ", err)
return nil, err
}
data := buffer[:dataLen]
command, err := UnmarshalCommand(cmdID, data)
if err == nil {
header.Command = command
}
}
return header, nil
}