package ftpd import ( "crypto/tls" "errors" "github.com/seaweedfs/seaweedfs/weed/util" "net" ftpserver "github.com/fclairamb/ftpserverlib" "google.golang.org/grpc" ) type FtpServerOption struct { Filer string IP string IpBind string Port int FilerGrpcAddress string FtpRoot string GrpcDialOption grpc.DialOption PassivePortStart int PassivePortStop int } type SftpServer struct { option *FtpServerOption ftpListener net.Listener } var _ = ftpserver.MainDriver(&SftpServer{}) // NewFtpServer returns a new FTP server driver func NewFtpServer(ftpListener net.Listener, option *FtpServerOption) (*SftpServer, error) { var err error server := &SftpServer{ option: option, ftpListener: ftpListener, } return server, err } // GetSettings returns some general settings around the server setup func (s *SftpServer) GetSettings() (*ftpserver.Settings, error) { var portRange *ftpserver.PortRange if s.option.PassivePortStart > 0 && s.option.PassivePortStop > s.option.PassivePortStart { portRange = &ftpserver.PortRange{ Start: s.option.PassivePortStart, End: s.option.PassivePortStop, } } return &ftpserver.Settings{ Listener: s.ftpListener, ListenAddr: util.JoinHostPort(s.option.IpBind, s.option.Port), PublicHost: s.option.IP, PassiveTransferPortRange: portRange, ActiveTransferPortNon20: true, IdleTimeout: -1, ConnectionTimeout: 20, }, nil } // ClientConnected is called to send the very first welcome message func (s *SftpServer) ClientConnected(cc ftpserver.ClientContext) (string, error) { return "Welcome to SeaweedFS FTP Server", nil } // ClientDisconnected is called when the user disconnects, even if he never authenticated func (s *SftpServer) ClientDisconnected(cc ftpserver.ClientContext) { } // AuthUser authenticates the user and selects an handling driver func (s *SftpServer) AuthUser(cc ftpserver.ClientContext, username, password string) (ftpserver.ClientDriver, error) { return nil, nil } // GetTLSConfig returns a TLS Certificate to use // The certificate could frequently change if we use something like "let's encrypt" func (s *SftpServer) GetTLSConfig() (*tls.Config, error) { return nil, errors.New("no TLS certificate configured") }