path: root/lib/ssh/test/ssh_sftpd_SUITE.erl

%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2006-2017. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%%     http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%

%%
-module(ssh_sftpd_SUITE).

%% Note: This directive should only be used in test suites.
-compile(export_all).

-include_lib("common_test/include/ct.hrl").
-include_lib("kernel/include/file.hrl").
-include("ssh_xfer.hrl").
-include("ssh.hrl").
-include("ssh_test_lib.hrl").

-define(USER, "Alladin").
-define(PASSWD, "Sesame").
-define(XFER_PACKET_SIZE, 32768).
-define(XFER_WINDOW_SIZE, 4*?XFER_PACKET_SIZE).
-define(TIMEOUT, 10000).
-define(REG_ATTERS, <<0,0,0,0,1>>).
-define(UNIX_EPOCH,  62167219200).

-define(is_set(F, Bits),
	((F) band (Bits)) == (F)).

%%--------------------------------------------------------------------
%% Common Test interface functions -----------------------------------
%%--------------------------------------------------------------------

suite() ->
    [{timetrap,{seconds,40}}].

all() -> 
    [open_close_file, 
     open_close_dir, 
     read_file, 
     read_dir,
     write_file, 
     rename_file, 
     mk_rm_dir, 
     remove_file,
     real_path, 
     retrieve_attributes, 
     set_attributes, 
     links,
     ver3_rename,
     ver3_open_flags,
     relpath, 
     sshd_read_file,
     ver6_basic,
     access_outside_root,
     root_with_cwd,
     relative_path,
     open_file_dir_v5,
     open_file_dir_v6].

groups() -> 
    [].

%%--------------------------------------------------------------------

init_per_suite(Config) ->
    ?CHECK_CRYPTO(
       begin
	   DataDir = proplists:get_value(data_dir, Config),	    
	   PrivDir = proplists:get_value(priv_dir, Config),
	   ssh_test_lib:setup_dsa(DataDir, PrivDir),
	   %% to make sure we don't use public-key-auth
	   %% this should be tested by other test suites
	   UserDir = filename:join(proplists:get_value(priv_dir, Config), nopubkey), 
	   file:make_dir(UserDir),  
	   Config
       end).

end_per_suite(Config) ->
    SysDir = proplists:get_value(priv_dir, Config),
    ssh_test_lib:clean_dsa(SysDir),
    UserDir = filename:join(proplists:get_value(priv_dir, Config), nopubkey),
    file:del_dir(UserDir),
    ssh:stop().

%%--------------------------------------------------------------------

init_per_group(_GroupName, Config) ->
	Config.

end_per_group(_GroupName, Config) ->
	Config.

%%--------------------------------------------------------------------

init_per_testcase(TestCase, Config) ->
    ssh:start(),
    prep(Config),
    PrivDir = proplists:get_value(priv_dir, Config),
    ClientUserDir = filename:join(PrivDir, nopubkey),
    SystemDir = filename:join(proplists:get_value(priv_dir, Config), system),

    Options = [{system_dir, SystemDir},
	       {user_dir, PrivDir},
	       {user_passwords,[{?USER, ?PASSWD}]},
	       {pwdfun, fun(_,_) -> true end}],
    {ok, Sftpd} = case TestCase of
		      ver6_basic ->
			  SubSystems = [ssh_sftpd:subsystem_spec([{sftpd_vsn, 6}])],
			  ssh:daemon(0, [{subsystems, SubSystems}|Options]);
                      access_outside_root ->
                          %% Build RootDir/access_outside_root/a/b and set Root and CWD
                          BaseDir = filename:join(PrivDir, access_outside_root),
                          RootDir = filename:join(BaseDir, a),
                          CWD     = filename:join(RootDir, b),
                          %% Make the directory chain:
                          ok = filelib:ensure_dir(filename:join(CWD, tmp)),
                          SubSystems = [ssh_sftpd:subsystem_spec([{root, RootDir},
                                                                  {cwd, CWD}])],
                          ssh:daemon(0, [{subsystems, SubSystems}|Options]);
		      root_with_cwd ->
			  RootDir = filename:join(PrivDir, root_with_cwd),
			  CWD     = filename:join(RootDir, home),
			  SubSystems = [ssh_sftpd:subsystem_spec([{root, RootDir}, {cwd, CWD}])],
			  ssh:daemon(0, [{subsystems, SubSystems}|Options]);
		      relative_path ->
			  SubSystems = [ssh_sftpd:subsystem_spec([{cwd, PrivDir}])],
			  ssh:daemon(0, [{subsystems, SubSystems}|Options]);
		      open_file_dir_v5 ->
			  SubSystems = [ssh_sftpd:subsystem_spec([{cwd, PrivDir}])],
			  ssh:daemon(0, [{subsystems, SubSystems}|Options]);
		      open_file_dir_v6 ->
			  SubSystems = [ssh_sftpd:subsystem_spec([{cwd, PrivDir},
								  {sftpd_vsn, 6}])],
			  ssh:daemon(0, [{subsystems, SubSystems}|Options]);
		      _ ->
			  SubSystems = [ssh_sftpd:subsystem_spec([])],
			  ssh:daemon(0, [{subsystems, SubSystems}|Options])
		  end,
    {ok,Dinf} = ssh:daemon_info(Sftpd),
    Port = proplists:get_value(port, Dinf),
    
    Cm = ssh_test_lib:connect(Port,
			      [{user_dir, ClientUserDir},
			       {user, ?USER}, {password, ?PASSWD},
			       {user_interaction, false},
			       {silently_accept_hosts, true},
			       {pwdfun, fun(_,_) -> true end}]),
    {ok, Channel} =
	ssh_connection:session_channel(Cm, ?XFER_WINDOW_SIZE,
				       ?XFER_PACKET_SIZE, ?TIMEOUT),
    
    success = ssh_connection:subsystem(Cm, Channel, "sftp", ?TIMEOUT),

    ProtocolVer = case atom_to_list(TestCase) of
		      "ver3_" ++ _ ->
			  3;
		      _ ->
			  ?SSH_SFTP_PROTOCOL_VERSION
		  end,

    Data = <<?UINT32(ProtocolVer)>> ,

    Size = 1 + size(Data),

    ssh_connection:send(Cm, Channel, << ?UINT32(Size),
				      ?SSH_FXP_INIT, Data/binary >>),

    {ok, <<?SSH_FXP_VERSION, ?UINT32(Version), _Ext/binary>>, _}
	= reply(Cm, Channel),

    ct:log("Client: ~p Server ~p~n", [ProtocolVer, Version]),

    [{sftp, {Cm, Channel}}, {sftpd, Sftpd }| Config].

end_per_testcase(_TestCase, Config) ->
    ssh_sftpd:stop(proplists:get_value(sftpd, Config)),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    ssh_connection:close(Cm, Channel),
    ssh:close(Cm),
    ssh:stop().

%%--------------------------------------------------------------------
%% Test Cases --------------------------------------------------------
%%--------------------------------------------------------------------
open_close_file() ->
    [{doc, "Test SSH_FXP_OPEN and SSH_FXP_CLOSE commands"}].
open_close_file(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = filename:join(PrivDir, "test.txt"),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    ReqId = 0,

    {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId), Handle/binary>>, _} =
	open_file(FileName, Cm, Channel, ReqId,
		  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
		  ?SSH_FXF_OPEN_EXISTING),

    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
	  ?UINT32(?SSH_FX_OK), _/binary>>, _} = close(Handle, ReqId,
						      Cm, Channel),
    NewReqId = ReqId + 1,
    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
	  ?UINT32(?SSH_FX_INVALID_HANDLE), _/binary>>, _} =
	close(Handle, ReqId, Cm, Channel),

    NewReqId1 = NewReqId + 1,
    %%  {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId),  % Ver 6 we have 5
    %% 	   ?UINT32(?SSH_FX_FILE_IS_A_DIRECTORY), _/binary>>, _} =
    {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId1),
	  ?UINT32(?SSH_FX_FAILURE), _/binary>>, _} =
	open_file(PrivDir, Cm, Channel, NewReqId1,
		  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
		  ?SSH_FXF_OPEN_EXISTING).

ver3_open_flags() ->
    [{doc, "Test open flags"}].
ver3_open_flags(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = filename:join(PrivDir, "not_exist.txt"),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    ReqId = 0,
    
    {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId), Handle/binary>>, _} =
	open_file_v3(FileName, Cm, Channel, ReqId,
		     ?SSH_FXF_CREAT bor ?SSH_FXF_TRUNC),
    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
	   ?UINT32(?SSH_FX_OK), _/binary>>, _} = close(Handle, ReqId,
						       Cm, Channel),
   
    NewFileName = filename:join(PrivDir, "not_exist2.txt"),
    NewReqId = ReqId + 1, 
    {ok, <<?SSH_FXP_HANDLE, ?UINT32(NewReqId), NewHandle/binary>>, _} =
     	open_file_v3(NewFileName, Cm, Channel, NewReqId,
    		     ?SSH_FXF_CREAT bor ?SSH_FXF_EXCL),
    {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId),
    	   ?UINT32(?SSH_FX_OK), _/binary>>, _} = close(NewHandle, NewReqId,
    						       Cm, Channel),
    
    NewFileName1 = filename:join(PrivDir, "test.txt"),
    NewReqId1 = NewReqId + 1,
    {ok, <<?SSH_FXP_HANDLE, ?UINT32(NewReqId1), NewHandle1/binary>>, _} =
	open_file_v3(NewFileName1, Cm, Channel, NewReqId1,
		     ?SSH_FXF_READ bor ?SSH_FXF_WRITE bor ?SSH_FXF_APPEND),
     {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId1),
	   ?UINT32(?SSH_FX_OK), _/binary>>, _} = close(NewHandle1, NewReqId1,
						       Cm, Channel).
    
%%--------------------------------------------------------------------
open_close_dir() ->
    [{doc,"Test SSH_FXP_OPENDIR and SSH_FXP_CLOSE commands"}].
open_close_dir(Config) when is_list(Config) ->
    PrivDir = proplists:get_value(priv_dir, Config),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    FileName = filename:join(PrivDir, "test.txt"),
    ReqId = 0,

    {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId), Handle/binary>>, _} =
	open_dir(PrivDir, Cm, Channel, ReqId),

    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
	  ?UINT32(?SSH_FX_OK), _/binary>>, _} = close(Handle, ReqId,
						      Cm, Channel),

    NewReqId = 1,
    case open_dir(FileName, Cm, Channel, NewReqId) of
	{ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId),
	      ?UINT32(?SSH_FX_NOT_A_DIRECTORY), _/binary>>, _} ->
	    %% Only if server is using vsn > 5.
	    ok;
	{ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId),
	      ?UINT32(?SSH_FX_FAILURE), _/binary>>, _} ->
	    ok
    end.

%%--------------------------------------------------------------------
read_file() ->
    [{doc, "Test SSH_FXP_READ command"}].
read_file(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = filename:join(PrivDir, "test.txt"),

    ReqId = 0,
    {Cm, Channel} = proplists:get_value(sftp, Config),

    {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId), Handle/binary>>, _} =
	open_file(FileName, Cm, Channel, ReqId,
		  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
		  ?SSH_FXF_OPEN_EXISTING),

    NewReqId = 1,

    {ok, <<?SSH_FXP_DATA, ?UINT32(NewReqId), ?UINT32(_Length),
	  Data/binary>>, _} =
	read_file(Handle, 100, 0, Cm, Channel, NewReqId),

    {ok, Data} = file:read_file(FileName).

%%--------------------------------------------------------------------
read_dir() ->
    [{doc,"Test SSH_FXP_READDIR command"}].
read_dir(Config) when is_list(Config) ->
    PrivDir = proplists:get_value(priv_dir, Config),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    ReqId = 0,
    {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId), Handle/binary>>, _} =
	open_dir(PrivDir, Cm, Channel, ReqId),
    ok = read_dir(Handle, Cm, Channel, ReqId).

%%--------------------------------------------------------------------
write_file() ->
    [{doc, "Test SSH_FXP_WRITE command"}].
write_file(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = filename:join(PrivDir, "test.txt"),

    ReqId = 0,
    {Cm, Channel} = proplists:get_value(sftp, Config),

    {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId), Handle/binary>>, _} =
	open_file(FileName, Cm, Channel, ReqId,
		  ?ACE4_WRITE_DATA  bor ?ACE4_WRITE_ATTRIBUTES,
		  ?SSH_FXF_OPEN_EXISTING),

    NewReqId = 1,
    Data =  list_to_binary("Write file test"),

    {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId), ?UINT32(?SSH_FX_OK),
	  _/binary>>, _}
	= write_file(Handle, Data, 0, Cm, Channel, NewReqId),

    {ok, Data} = file:read_file(FileName).

%%--------------------------------------------------------------------
remove_file() ->
    [{doc, "Test SSH_FXP_REMOVE command"}].
remove_file(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = filename:join(PrivDir, "test.txt"),
    ReqId = 0,
    {Cm, Channel} = proplists:get_value(sftp, Config),

    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
	   ?UINT32(?SSH_FX_OK), _/binary>>, _} =
	remove(FileName, Cm, Channel, ReqId),

    NewReqId = 1,
    %%  {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId), % ver 6 we have 5
    %% 	  ?UINT32(?SSH_FX_FILE_IS_A_DIRECTORY ), _/binary>>, _} =

    {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId),
	  ?UINT32(?SSH_FX_FAILURE), _/binary>>, _} =
	remove(PrivDir, Cm, Channel, NewReqId).

%%--------------------------------------------------------------------
rename_file() ->
    [{doc, "Test SSH_FXP_RENAME command"}].
rename_file(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = filename:join(PrivDir, "test.txt"),
    NewFileName = filename:join(PrivDir, "test1.txt"),
    ReqId = 0,
    {Cm, Channel} = proplists:get_value(sftp, Config),

    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
	  ?UINT32(?SSH_FX_OK), _/binary>>, _} =
	rename(FileName, NewFileName, Cm, Channel, ReqId, 6, 0),

    NewReqId = ReqId + 1,

    {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId),
	  ?UINT32(?SSH_FX_OK), _/binary>>, _} =
	rename(NewFileName, FileName, Cm, Channel, NewReqId, 6,
	       ?SSH_FXP_RENAME_OVERWRITE),

    NewReqId1 = NewReqId + 1,
    file:copy(FileName, NewFileName),

    %% No owerwrite
    {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId1),
	  ?UINT32(?SSH_FX_FILE_ALREADY_EXISTS), _/binary>>, _} =
	rename(FileName, NewFileName, Cm, Channel, NewReqId1, 6,
	       ?SSH_FXP_RENAME_NATIVE),

    NewReqId2 = NewReqId1 + 1,

    {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId2),
	  ?UINT32(?SSH_FX_OP_UNSUPPORTED), _/binary>>, _} =
	rename(FileName, NewFileName, Cm, Channel, NewReqId2, 6,
	       ?SSH_FXP_RENAME_ATOMIC).

%%--------------------------------------------------------------------
mk_rm_dir() ->
    [{doc, "Test SSH_FXP_MKDIR and SSH_FXP_RMDIR command"}].
mk_rm_dir(Config) when is_list(Config) ->
    PrivDir = proplists:get_value(priv_dir, Config),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    DirName = filename:join(PrivDir, "test"),
    ReqId = 0,
    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId), ?UINT32(?SSH_FX_OK),
	  _/binary>>, _} = mkdir(DirName, Cm, Channel, ReqId),

    NewReqId = 1,
    {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId), ?UINT32(?SSH_FX_FILE_ALREADY_EXISTS),
	  _/binary>>, _} = mkdir(DirName, Cm, Channel, NewReqId),

    NewReqId1 = 2,
    {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId1), ?UINT32(?SSH_FX_OK),
	    _/binary>>, _} = rmdir(DirName, Cm, Channel, NewReqId1),

    NewReqId2 = 3,
    {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId2), ?UINT32(?SSH_FX_NO_SUCH_FILE),
	    _/binary>>, _} = rmdir(DirName, Cm, Channel, NewReqId2).

%%--------------------------------------------------------------------
real_path() ->
    [{doc, "Test SSH_FXP_REALPATH command"}].
real_path(Config) when is_list(Config) ->
    case os:type() of
	{win32, _} ->
	    {skip,  "Not a relevant test on windows"};
	_ ->
	    ReqId = 0,
	    {Cm, Channel} = proplists:get_value(sftp, Config),
	    PrivDir = proplists:get_value(priv_dir, Config),
	    TestDir = filename:join(PrivDir, "ssh_test"),
	    ok = file:make_dir(TestDir),

	    OrigPath = filename:join(TestDir, ".."),

	    {ok, <<?SSH_FXP_NAME, ?UINT32(ReqId), ?UINT32(_), ?UINT32(Len),
	     Path:Len/binary, _/binary>>, _}
		= real_path(OrigPath, Cm, Channel, ReqId),

	    RealPath = filename:absname(binary_to_list(Path)),
	    AbsPrivDir = filename:absname(PrivDir),

	    ct:log("Path: ~p PrivDir: ~p~n", [RealPath, AbsPrivDir]),

	    true = RealPath == AbsPrivDir
    end.

%%--------------------------------------------------------------------
links(Config) when is_list(Config) ->
    case os:type() of
	{win32, _} ->
	    {skip, "Links are not fully supported by windows"};
	_ ->
	    ReqId = 0,
	    {Cm, Channel} = proplists:get_value(sftp, Config),
	    PrivDir =  proplists:get_value(priv_dir, Config),
	    FileName = filename:join(PrivDir, "test.txt"),
	    LinkFileName = filename:join(PrivDir, "link_test.txt"),

	    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
		  ?UINT32(?SSH_FX_OK), _/binary>>, _} =
		create_link(LinkFileName, FileName, Cm, Channel, ReqId),

	    NewReqId = 1,
	    {ok, <<?SSH_FXP_NAME, ?UINT32(NewReqId), ?UINT32(_), ?UINT32(Len),
		  Path:Len/binary, _/binary>>, _}
		= read_link(LinkFileName, Cm, Channel, NewReqId),


	    true = binary_to_list(Path) == FileName,

	    ct:log("Path: ~p~n", [binary_to_list(Path)])
    end.

%%--------------------------------------------------------------------
retrieve_attributes() ->
    [{"Test SSH_FXP_STAT, SSH_FXP_LSTAT AND SSH_FXP_FSTAT commands"}].
retrieve_attributes(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = filename:join(PrivDir, "test.txt"),
    ReqId = 0,
    {Cm, Channel} = proplists:get_value(sftp, Config),

    {ok, FileInfo} = file:read_file_info(FileName),

    AttrValues =
	retrive_attributes(FileName, Cm, Channel, ReqId),

    Type =  encode_file_type(FileInfo#file_info.type),
    Size = FileInfo#file_info.size,
    Owner = FileInfo#file_info.uid,
    Group =  FileInfo#file_info.gid,
    Permissions = FileInfo#file_info.mode,
    Atime =  calendar:datetime_to_gregorian_seconds(
	       erlang:localtime_to_universaltime(FileInfo#file_info.atime))
	-  ?UNIX_EPOCH,
    Mtime =  calendar:datetime_to_gregorian_seconds(
	       erlang:localtime_to_universaltime(FileInfo#file_info.mtime))
	-  ?UNIX_EPOCH,
    Ctime =  calendar:datetime_to_gregorian_seconds(
	       erlang:localtime_to_universaltime(FileInfo#file_info.ctime))
	-  ?UNIX_EPOCH,

    lists:foreach(fun(Value) ->
			  <<?UINT32(Flags), _/binary>> = Value,
			  true = ?is_set(?SSH_FILEXFER_ATTR_SIZE,
					Flags),
			  true = ?is_set(?SSH_FILEXFER_ATTR_PERMISSIONS,
					Flags),
			  true = ?is_set(?SSH_FILEXFER_ATTR_ACCESSTIME,
					Flags),
			  true = ?is_set(?SSH_FILEXFER_ATTR_CREATETIME,
					Flags),
			  true = ?is_set(?SSH_FILEXFER_ATTR_MODIFYTIME,
					Flags),
			  true = ?is_set(?SSH_FILEXFER_ATTR_OWNERGROUP,
					 Flags),
			  false = ?is_set(?SSH_FILEXFER_ATTR_ACL,
					Flags),
			  false = ?is_set(?SSH_FILEXFER_ATTR_SUBSECOND_TIMES,
					Flags),
			  false = ?is_set(?SSH_FILEXFER_ATTR_BITS,
					Flags),
			  false = ?is_set(?SSH_FILEXFER_ATTR_EXTENDED,
					Flags),

			  <<?UINT32(_Flags), ?BYTE(Type),
			   ?UINT64(Size),
			   ?UINT32(OwnerLen), BinOwner:OwnerLen/binary,
			   ?UINT32(GroupLen), BinGroup:GroupLen/binary,
			   ?UINT32(Permissions),
			   ?UINT64(Atime),
			   ?UINT64(Ctime),
			   ?UINT64(Mtime)>> = Value,

			  Owner = list_to_integer(binary_to_list(BinOwner)),
			  Group =  list_to_integer(binary_to_list(BinGroup))
		  end, AttrValues).

%%--------------------------------------------------------------------
set_attributes() ->
    [{doc, "Test SSH_FXP_SETSTAT AND SSH_FXP_FSETSTAT commands"}].
set_attributes(Config) when is_list(Config) ->
    case os:type() of
	{win32, _} ->
	    {skip,  "Known error bug in erts file:read_file_info"};
	_ ->
	    PrivDir =  proplists:get_value(priv_dir, Config),
	    FileName = filename:join(PrivDir, "test.txt"),
	    ReqId = 0,
	    {Cm, Channel} = proplists:get_value(sftp, Config),

	    {ok, FileInfo} = file:read_file_info(FileName),

	    OrigPermissions = FileInfo#file_info.mode,
	    Permissions = not_default_permissions(),

	    Flags = ?SSH_FILEXFER_ATTR_PERMISSIONS,

	    Atters = [?uint32(Flags), ?byte(?SSH_FILEXFER_TYPE_REGULAR),
		      ?uint32(Permissions)],

	    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
		   ?UINT32(?SSH_FX_OK), _/binary>>, _} =
		set_attributes_file(FileName, Atters, Cm, Channel, ReqId),

	    {ok, NewFileInfo} = file:read_file_info(FileName),
	    NewPermissions = NewFileInfo#file_info.mode,

	    %% Can not test that NewPermissions = Permissions as
	    %% on Unix platforms, other bits than those listed in the
	    %% API may be set.
	    ct:log("Org: ~p New: ~p~n", [OrigPermissions, NewPermissions]),
	    true = OrigPermissions =/= NewPermissions,

	    ct:log("Try to open the file"),
	    NewReqId = 2,
	    {ok, <<?SSH_FXP_HANDLE, ?UINT32(NewReqId), Handle/binary>>, _} =
		open_file(FileName, Cm, Channel, NewReqId,
			  ?ACE4_READ_DATA bor ?ACE4_WRITE_ATTRIBUTES,
			  ?SSH_FXF_OPEN_EXISTING),

	    NewAtters = [?uint32(Flags), ?byte(?SSH_FILEXFER_TYPE_REGULAR),
			 ?uint32(OrigPermissions)],

	    NewReqId1 = 3,

	    ct:log("Set original permissions on the now open file"),

	    {ok, <<?SSH_FXP_STATUS, ?UINT32(NewReqId1),
		   ?UINT32(?SSH_FX_OK), _/binary>>, _} =
		set_attributes_open_file(Handle, NewAtters, Cm, Channel, NewReqId1),

	    {ok, NewFileInfo1} = file:read_file_info(FileName),
	    OrigPermissions = NewFileInfo1#file_info.mode
    end.

%%--------------------------------------------------------------------
ver3_rename() ->
    [{doc, "Test that ver3 rename message is handled OTP 6352"}].
ver3_rename(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = filename:join(PrivDir, "test.txt"),
    NewFileName = filename:join(PrivDir, "test1.txt"),
    ReqId = 0,
    {Cm, Channel} = proplists:get_value(sftp, Config),

    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
	  ?UINT32(?SSH_FX_OK), _/binary>>, _} =
	rename(FileName, NewFileName, Cm, Channel, ReqId, 3, 0).

%%--------------------------------------------------------------------
relpath() ->
    [{doc, "Check that realpath works ok seq10670"}].
relpath(Config) when is_list(Config) ->
    ReqId = 0,
    {Cm, Channel} = proplists:get_value(sftp, Config),

    case os:type() of
	{win32, _} ->
	    {skip,  "Not a relevant test on windows"};
	_ ->
	    {ok, <<?SSH_FXP_NAME, ?UINT32(ReqId), ?UINT32(_), ?UINT32(Len),
		  Root:Len/binary, _/binary>>, _}
		= real_path("/..", Cm, Channel, ReqId),

	    <<"/">> = Root,

	    {ok, <<?SSH_FXP_NAME, ?UINT32(ReqId), ?UINT32(_), ?UINT32(Len),
		  Path:Len/binary, _/binary>>, _}
		= real_path("/usr/bin/../..", Cm, Channel, ReqId),
	    Root = Path
    end.

%%--------------------------------------------------------------------
sshd_read_file() ->
    [{doc,"Test SSH_FXP_READ command, using sshd-server"}].
sshd_read_file(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = filename:join(PrivDir, "test.txt"),

    ReqId = 0,
    {Cm, Channel} = proplists:get_value(sftp, Config),

    {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId), Handle/binary>>, _} =
	open_file(FileName, Cm, Channel, ReqId,
		  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
		  ?SSH_FXF_OPEN_EXISTING),

    NewReqId = 1,

    {ok, <<?SSH_FXP_DATA, ?UINT32(NewReqId), ?UINT32(_Length),
	  Data/binary>>, _} =
	read_file(Handle, 100, 0, Cm, Channel, NewReqId),

    {ok, Data} = file:read_file(FileName).
%%--------------------------------------------------------------------
ver6_basic() ->
    [{doc, "Test SFTP Version 6"}].
ver6_basic(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    %FileName = filename:join(PrivDir, "test.txt"),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    ReqId = 0,
    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),  % Ver 6 we have 5
	   ?UINT32(?SSH_FX_FILE_IS_A_DIRECTORY), _/binary>>, _} =
	open_file(PrivDir, Cm, Channel, ReqId,
		  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
		  ?SSH_FXF_OPEN_EXISTING).

%%--------------------------------------------------------------------
access_outside_root() ->
    [{doc, "Try access files outside the tree below RootDir"}].
access_outside_root(Config) when is_list(Config) ->
    PrivDir  =  proplists:get_value(priv_dir, Config),
    BaseDir  = filename:join(PrivDir, access_outside_root),
    %% A file outside the tree below RootDir which is BaseDir/a
    %% Make the file  BaseDir/bad :
    BadFilePath = filename:join([BaseDir, bad]),
    ok = file:write_file(BadFilePath, <<>>),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    %% Try to access a file parallell to the RootDir:
    try_access("/../bad",   Cm, Channel, 0),
    %% Try to access the same file via the CWD which is /b relative to the RootDir:
    try_access("../../bad", Cm, Channel, 1).


try_access(Path, Cm, Channel, ReqId) ->
    Return = 
        open_file(Path, Cm, Channel, ReqId, 
                  ?ACE4_READ_DATA bor ?ACE4_READ_ATTRIBUTES,
                  ?SSH_FXF_OPEN_EXISTING),
    ct:log("Try open ~p -> ~p",[Path,Return]),
    case Return of
        {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId), _Handle0/binary>>, _} ->
            ct:fail("Could open a file outside the root tree!");
        {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId), ?UINT32(Code), Rest/binary>>, <<>>} ->
            case Code of
                ?SSH_FX_FILE_IS_A_DIRECTORY ->
                    ct:pal("Got the expected SSH_FX_FILE_IS_A_DIRECTORY status",[]),
                    ok;
                ?SSH_FX_FAILURE ->
                    ct:pal("Got the expected SSH_FX_FAILURE status",[]),
                    ok;
                _ ->
                    case Rest of
                        <<?UINT32(Len), Txt:Len/binary, _/binary>> ->
                            ct:fail("Got unexpected SSH_FX_code: ~p (~p)",[Code,Txt]);
                        _ ->
                            ct:fail("Got unexpected SSH_FX_code: ~p",[Code])
                    end
            end;
        _ ->
            ct:fail("Completly unexpected return: ~p", [Return])
    end.

%%--------------------------------------------------------------------
root_with_cwd() ->
    [{doc, "Check if files are found, if the CWD and Root are specified"}].
root_with_cwd(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    RootDir = filename:join(PrivDir, root_with_cwd),
    CWD     = filename:join(RootDir, home),
    FileName = "root_with_cwd.txt",
    FilePath = filename:join(CWD, FileName),
    ok = filelib:ensure_dir(FilePath),
    ok = file:write_file(FilePath ++ "0", <<>>),
    ok = file:write_file(FilePath ++ "1", <<>>),
    ok = file:write_file(FilePath ++ "2", <<>>),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    ReqId0 = 0,
    {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId0), _Handle0/binary>>, _} =
	open_file(FileName ++ "0", Cm, Channel, ReqId0,
		  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
		  ?SSH_FXF_OPEN_EXISTING),
    ReqId1 = 1,
    {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId1), _Handle1/binary>>, _} =
	open_file("./" ++ FileName ++ "1", Cm, Channel, ReqId1,
		  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
		  ?SSH_FXF_OPEN_EXISTING),
    ReqId2 = 2,
    {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId2), _Handle2/binary>>, _} =
	open_file("/home/" ++ FileName ++ "2", Cm, Channel, ReqId2,
		  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
		  ?SSH_FXF_OPEN_EXISTING).

%%--------------------------------------------------------------------
relative_path() ->
    [{doc, "Test paths relative to CWD when opening a file handle."}].
relative_path(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = "test_relative_path.txt",
    FilePath = filename:join(PrivDir, FileName),
    ok = filelib:ensure_dir(FilePath),
    ok = file:write_file(FilePath, <<>>),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    ReqId = 0,
    {ok, <<?SSH_FXP_HANDLE, ?UINT32(ReqId), _Handle/binary>>, _} =
        open_file(FileName, Cm, Channel, ReqId,
                  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
                  ?SSH_FXF_OPEN_EXISTING).

%%--------------------------------------------------------------------
open_file_dir_v5() ->
    [{doc, "Test if open_file fails when opening existing directory."}].
open_file_dir_v5(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = "open_file_dir_v5",
    FilePath = filename:join(PrivDir, FileName),
    ok = filelib:ensure_dir(FilePath),
    ok = file:make_dir(FilePath),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    ReqId = 0,
    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
	   ?UINT32(?SSH_FX_FAILURE), _/binary>>, _} =
        open_file(FileName, Cm, Channel, ReqId,
                  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
                  ?SSH_FXF_OPEN_EXISTING).

%%--------------------------------------------------------------------
open_file_dir_v6() ->
    [{doc, "Test if open_file fails when opening existing directory."}].
open_file_dir_v6(Config) when is_list(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    FileName = "open_file_dir_v6",
    FilePath = filename:join(PrivDir, FileName),
    ok = filelib:ensure_dir(FilePath),
    ok = file:make_dir(FilePath),
    {Cm, Channel} = proplists:get_value(sftp, Config),
    ReqId = 0,
    {ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
	   ?UINT32(?SSH_FX_FILE_IS_A_DIRECTORY), _/binary>>, _} =
        open_file(FileName, Cm, Channel, ReqId,
                  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
                  ?SSH_FXF_OPEN_EXISTING).

%%--------------------------------------------------------------------
%% Internal functions ------------------------------------------------
%%--------------------------------------------------------------------
prep(Config) ->
    PrivDir =  proplists:get_value(priv_dir, Config),
    TestFile = filename:join(PrivDir, "test.txt"),
    TestFile1 = filename:join(PrivDir, "test1.txt"),

    file:delete(TestFile),
    file:delete(TestFile1),

    %% Initial config
    DataDir = proplists:get_value(data_dir, Config),
    FileName = filename:join(DataDir, "test.txt"),
    file:copy(FileName, TestFile),
    Mode = 8#00400 bor 8#00200 bor 8#00040, % read & write owner, read group
    {ok, FileInfo} = file:read_file_info(TestFile),
    ok = file:write_file_info(TestFile,
			      FileInfo#file_info{mode = Mode}).

reply(Cm, Channel) ->
    reply(Cm, Channel,<<>>).

reply(Cm, Channel, RBuf) ->
    receive
	{ssh_cm, Cm, {data, Channel, 0, Data}} ->
	    case <<RBuf/binary, Data/binary>> of
		<<?UINT32(Len),Reply:Len/binary,Rest/binary>> ->
		    {ok, Reply, Rest};
		RBuf2 ->
		    reply(Cm, Channel, RBuf2)
	    end;
	{ssh_cm, Cm, {eof, Channel}} ->
	    eof;
	{ssh_cm, Cm, {closed, Channel}} ->
	    closed;
	{ssh_cm, Cm, Msg} ->
	    ct:fail(Msg)
    after 
	30000 -> ct:fail("timeout ~p:~p",[?MODULE,?LINE])
    end.

open_file(File, Cm, Channel, ReqId, Access, Flags) ->
    Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(File)),
			   ?uint32(Access),
			   ?uint32(Flags),
			   ?REG_ATTERS]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
				      ?SSH_FXP_OPEN, Data/binary>>),
    reply(Cm, Channel).

open_file_v3(File, Cm, Channel, ReqId, Flags) ->

    Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(File)),
			   ?uint32(Flags),
			   ?REG_ATTERS]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
				      ?SSH_FXP_OPEN, Data/binary>>),
    reply(Cm, Channel).


close(Handle, ReqId, Cm , Channel) ->
    Data = list_to_binary([?uint32(ReqId), Handle]),

    Size = 1 + size(Data),

    ssh_connection:send(Cm, Channel, <<?UINT32(Size), ?SSH_FXP_CLOSE,
			      Data/binary>>),

    reply(Cm, Channel).



open_dir(Dir, Cm, Channel, ReqId) ->
    Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(Dir))]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
				      ?SSH_FXP_OPENDIR, Data/binary>>),
    reply(Cm, Channel).


rename(OldName, NewName, Cm, Channel, ReqId, Version, Flags) ->
    Data =
	case Version of
	    3 ->
		list_to_binary([?uint32(ReqId),
				?binary(list_to_binary(OldName)),
				?binary(list_to_binary(NewName))]);
	    _ ->
		list_to_binary([?uint32(ReqId),
				?binary(list_to_binary(OldName)),
				?binary(list_to_binary(NewName)),
				?uint32(Flags)])
	end,
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
				      ?SSH_FXP_RENAME, Data/binary>>),
    reply(Cm, Channel).


mkdir(Dir, Cm, Channel, ReqId)->
    Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(Dir)),
			   ?REG_ATTERS]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
				      ?SSH_FXP_MKDIR, Data/binary>>),
    reply(Cm, Channel).


rmdir(Dir, Cm, Channel, ReqId) ->
    Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(Dir))]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_RMDIR, Data/binary>>),
    reply(Cm, Channel).

remove(File, Cm, Channel, ReqId) ->
    Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(File))]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_REMOVE, Data/binary>>),
    reply(Cm, Channel).


read_dir(Handle, Cm, Channel, ReqId) ->

    Data = list_to_binary([?uint32(ReqId), Handle]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_READDIR, Data/binary>>),
    case reply(Cm, Channel) of
	{ok, <<?SSH_FXP_NAME, ?UINT32(ReqId), ?UINT32(Count),
	       ?UINT32(Len), Listing:Len/binary, _/binary>>, _} ->
	    ct:log("Count: ~p Listing: ~p~n",
			       [Count, binary_to_list(Listing)]),
	    read_dir(Handle, Cm, Channel, ReqId);
	{ok, <<?SSH_FXP_STATUS, ?UINT32(ReqId),
	      ?UINT32(?SSH_FX_EOF), _/binary>>, _}  ->
	    ok
    end.

read_file(Handle, MaxLength, OffSet, Cm, Channel, ReqId) ->
    Data = list_to_binary([?uint32(ReqId), Handle,
			   ?uint64(OffSet),
			   ?uint32(MaxLength)]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_READ, Data/binary>>),
    reply(Cm, Channel).


write_file(Handle, FileData, OffSet, Cm, Channel, ReqId) ->
    Data = list_to_binary([?uint32(ReqId), Handle,
			   ?uint64(OffSet),
			   ?binary(FileData)]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_WRITE, Data/binary>>),
    reply(Cm, Channel).


real_path(OrigPath, Cm, Channel, ReqId) ->
    Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(OrigPath))]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_REALPATH, Data/binary>>),
    reply(Cm, Channel).

create_link(LinkPath, Path, Cm, Channel, ReqId) ->
     Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(LinkPath)),
			   ?binary(list_to_binary(Path))]),
     Size = 1 + size(Data),
     ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_SYMLINK, Data/binary>>),
     reply(Cm, Channel).


read_link(Link, Cm, Channel, ReqId) ->
    Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(Link))]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_READLINK, Data/binary>>),
    reply(Cm, Channel).

retrive_attributes_file(FilePath, Flags, Cm, Channel, ReqId) ->
    Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(FilePath)),
			   ?uint32(Flags)]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_STAT, Data/binary>>),
    reply(Cm, Channel).

retrive_attributes_file_or_link(FilePath, Flags, Cm, Channel, ReqId) ->
    Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(FilePath)),
			   ?uint32(Flags)]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_LSTAT, Data/binary>>),
    reply(Cm, Channel).

retrive_attributes_open_file(Handle, Flags, Cm, Channel, ReqId) ->

    Data = list_to_binary([?uint32(ReqId),
			   Handle,
			   ?uint32(Flags)]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_FSTAT, Data/binary>>),
    reply(Cm, Channel).

retrive_attributes(FileName, Cm, Channel, ReqId) ->

    Attr =  ?SSH_FILEXFER_ATTR_SIZE,

    {ok, <<?SSH_FXP_ATTRS, ?UINT32(ReqId), Value/binary>>, _}
	= retrive_attributes_file(FileName, Attr,
				  Cm, Channel, ReqId),

    NewReqId = ReqId + 1,
    {ok, <<?SSH_FXP_ATTRS, ?UINT32(NewReqId), Value1/binary>>, _}
	= retrive_attributes_file_or_link(FileName,
					  Attr, Cm, Channel, NewReqId),

    NewReqId1 = NewReqId + 1,
    {ok, <<?SSH_FXP_HANDLE, ?UINT32(NewReqId1), Handle/binary>>, _} =
	open_file(FileName, Cm, Channel, NewReqId1,
		  ?ACE4_READ_DATA  bor ?ACE4_READ_ATTRIBUTES,
		  ?SSH_FXF_OPEN_EXISTING),

    NewReqId2 = NewReqId1 + 1,
    {ok, <<?SSH_FXP_ATTRS, ?UINT32(NewReqId2), Value2/binary>>, _}
	= retrive_attributes_open_file(Handle, Attr, Cm, Channel, NewReqId2),

    [Value, Value1, Value2].

set_attributes_file(FilePath, Atters, Cm, Channel, ReqId) ->
    Data = list_to_binary([?uint32(ReqId),
			   ?binary(list_to_binary(FilePath)),
			   Atters]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_SETSTAT, Data/binary>>),
    reply(Cm, Channel).


set_attributes_open_file(Handle, Atters, Cm, Channel, ReqId) ->

    Data = list_to_binary([?uint32(ReqId),
			   Handle,
			   Atters]),
    Size = 1 + size(Data),
    ssh_connection:send(Cm, Channel, <<?UINT32(Size),
			      ?SSH_FXP_FSETSTAT, Data/binary>>),
    reply(Cm, Channel).


encode_file_type(Type) ->
    case Type of
	regular -> ?SSH_FILEXFER_TYPE_REGULAR;
	directory -> ?SSH_FILEXFER_TYPE_DIRECTORY;
	symlink -> ?SSH_FILEXFER_TYPE_SYMLINK;
	special -> ?SSH_FILEXFER_TYPE_SPECIAL;
	unknown -> ?SSH_FILEXFER_TYPE_UNKNOWN;
	other -> ?SSH_FILEXFER_TYPE_UNKNOWN;
	socket -> ?SSH_FILEXFER_TYPE_SOCKET;
	char_device -> ?SSH_FILEXFER_TYPE_CHAR_DEVICE;
	block_device -> ?SSH_FILEXFER_TYPE_BLOCK_DEVICE;
	fifo -> ?SSH_FILEXFER_TYPE_FIFO;
	undefined -> ?SSH_FILEXFER_TYPE_UNKNOWN
    end.

not_default_permissions() ->
    8#600. %% User read-write-only