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-rw-r--r--lib/ssh/doc/src/ssh.xml4
-rw-r--r--lib/ssh/doc/src/ssh_connection.xml14
-rw-r--r--lib/ssh/doc/src/using_ssh.xml2
-rw-r--r--lib/ssh/src/ssh_connection.erl22
-rw-r--r--lib/ssh/src/ssh_connection_handler.erl17
-rw-r--r--lib/ssh/src/ssh_sftpd.erl122
-rw-r--r--lib/ssh/test/ssh_basic_SUITE.erl7
-rw-r--r--lib/ssh/test/ssh_connection_SUITE.erl29
-rw-r--r--lib/ssh/test/ssh_sftpd_SUITE.erl48
9 files changed, 185 insertions, 80 deletions
diff --git a/lib/ssh/doc/src/ssh.xml b/lib/ssh/doc/src/ssh.xml
index 9f5d1c003d..d481a75c9a 100644
--- a/lib/ssh/doc/src/ssh.xml
+++ b/lib/ssh/doc/src/ssh.xml
@@ -234,11 +234,11 @@
<taglist>
<tag><c><![CDATA[{inet, inet | inet6}]]></c></tag>
<item> IP version to use when the host address is specified as <c>any</c>. </item>
- <tag><c><![CDATA[{subsystems, [subsystem_spec()]]]></c></tag>
+ <tag><c><![CDATA[{subsystems, [subsystem_spec()]}]]></c></tag>
<item>
Provides specifications for handling of subsystems. The
"sftp" subsystem spec can be retrieved by calling
- ssh_sftpd:subsystem_spec/1. If the subsystems option in
+ ssh_sftpd:subsystem_spec/1. If the subsystems option is
not present the value of
<c>[ssh_sftpd:subsystem_spec([])]</c> will be used. It is
of course possible to set the option to the empty list if
diff --git a/lib/ssh/doc/src/ssh_connection.xml b/lib/ssh/doc/src/ssh_connection.xml
index ff72cf7ee0..5e2926dfa6 100644
--- a/lib/ssh/doc/src/ssh_connection.xml
+++ b/lib/ssh/doc/src/ssh_connection.xml
@@ -62,6 +62,7 @@
<p><c>ssh_request_status() = success | failure</c></p>
<p><c>event() = {ssh_cm, ssh_connection_ref(), ssh_event_msg()} </c></p>
<p><c>ssh_event_msg() = data_events() | status_events() | terminal_events() </c></p>
+ <p><c>reason() = timeout | closed </c></p>
<taglist>
<tag><b>data_events()</b></tag>
@@ -218,7 +219,7 @@
</func>
<func>
- <name>exec(ConnectionRef, ChannelId, Command, TimeOut) -> ssh_request_status() </name>
+ <name>exec(ConnectionRef, ChannelId, Command, TimeOut) -> ssh_request_status() | {error, reason()} </name>
<fsummary>Request that the server start the execution of the given command. </fsummary>
<type>
<v> ConnectionRef = ssh_connection_ref() </v>
@@ -274,7 +275,8 @@
</func>
<func>
- <name>ptty_alloc(ConnectionRef, ChannelId, Options, Timeout) -> success | failure</name>
+ <name>ptty_alloc(ConnectionRef, ChannelId, Options) -> </name>
+ <name>ptty_alloc(ConnectionRef, ChannelId, Options, Timeout) -> > ssh_request_status() | {error, reason()} </name>
<fsummary>Send status replies to requests that want such replies. </fsummary>
<type>
<v> ConnectionRef = ssh_connection_ref() </v>
@@ -374,7 +376,7 @@
<func>
<name>session_channel(ConnectionRef, Timeout) -> </name>
<name>session_channel(ConnectionRef, InitialWindowSize,
- MaxPacketSize, Timeout) -> {ok, ssh_channel_id()} | {error, Reason}</name>
+ MaxPacketSize, Timeout) -> {ok, ssh_channel_id()} | {error, reason()}</name>
<fsummary>Opens a channel for a ssh session. </fsummary>
<type>
<v> ConnectionRef = ssh_connection_ref()</v>
@@ -391,7 +393,7 @@
</func>
<func>
- <name>setenv(ConnectionRef, ChannelId, Var, Value, TimeOut) -> ssh_request_status()</name>
+ <name>setenv(ConnectionRef, ChannelId, Var, Value, TimeOut) -> ssh_request_status() | {error, reason()} </name>
<fsummary> Environment variables may be passed to the
shell/command to be started later.</fsummary>
<type>
@@ -409,7 +411,7 @@
</func>
<func>
- <name>shell(ConnectionRef, ChannelId) -> ssh_request_status()
+ <name>shell(ConnectionRef, ChannelId) -> ssh_request_status() | {error, closed}
</name>
<fsummary> Requests that the user's default shell (typically
defined in /etc/passwd in UNIX systems) shall be executed at the server
@@ -426,7 +428,7 @@
</func>
<func>
- <name>subsystem(ConnectionRef, ChannelId, Subsystem, Timeout) -> ssh_request_status()</name>
+ <name>subsystem(ConnectionRef, ChannelId, Subsystem, Timeout) -> ssh_request_status() | {error, reason()} </name>
<fsummary> </fsummary>
<type>
<v> ConnectionRef = ssh_connection_ref() </v>
diff --git a/lib/ssh/doc/src/using_ssh.xml b/lib/ssh/doc/src/using_ssh.xml
index 9ab71260d3..46178d4018 100644
--- a/lib/ssh/doc/src/using_ssh.xml
+++ b/lib/ssh/doc/src/using_ssh.xml
@@ -79,7 +79,7 @@
<p> The option user_dir defaults to the users ~/.ssh directory</p>
<p>In the following example we generate new keys and host keys as
- to be able to run the example without having root privilages</p>
+ to be able to run the example without having root privileges</p>
<code>
$bash> ssh-keygen -t rsa -f /tmp/ssh_daemon/ssh_host_rsa_key
diff --git a/lib/ssh/src/ssh_connection.erl b/lib/ssh/src/ssh_connection.erl
index 01141622d6..c66f810948 100644
--- a/lib/ssh/src/ssh_connection.erl
+++ b/lib/ssh/src/ssh_connection.erl
@@ -56,8 +56,8 @@
%%--------------------------------------------------------------------
%%--------------------------------------------------------------------
--spec session_channel(pid(), timeout()) -> {ok, channel_id()} | {error, term()}.
--spec session_channel(pid(), integer(), integer(), timeout()) -> {ok, channel_id()} | {error, term()}.
+-spec session_channel(pid(), timeout()) -> {ok, channel_id()} | {error, timeout | closed}.
+-spec session_channel(pid(), integer(), integer(), timeout()) -> {ok, channel_id()} | {error, timeout | closed}.
%% Description: Opens a channel for a ssh session. A session is a
%% remote execution of a program. The program may be a shell, an
@@ -81,7 +81,8 @@ session_channel(ConnectionHandler, InitialWindowSize,
end.
%%--------------------------------------------------------------------
--spec exec(pid(), channel_id(), string(), timeout()) -> success | failure.
+-spec exec(pid(), channel_id(), string(), timeout()) ->
+ success | failure | {error, timeout | closed}.
%% Description: Will request that the server start the
%% execution of the given command.
@@ -101,8 +102,8 @@ shell(ConnectionHandler, ChannelId) ->
ssh_connection_handler:request(ConnectionHandler, self(), ChannelId,
"shell", false, <<>>, 0).
%%--------------------------------------------------------------------
--spec subsystem(pid(), channel_id(), string(), timeout()) ->
- success | failure | {error, timeout}.
+-spec subsystem(pid(), channel_id(), string(), timeout()) ->
+ success | failure | {error, timeout | closed}.
%%
%% Description: Executes a predefined subsystem.
%%--------------------------------------------------------------------
@@ -142,7 +143,7 @@ send_eof(ConnectionHandler, Channel) ->
ssh_connection_handler:send_eof(ConnectionHandler, Channel).
%%--------------------------------------------------------------------
--spec adjust_window(pid(), channel_id(), integer()) -> ok.
+-spec adjust_window(pid(), channel_id(), integer()) -> ok | {error, closed}.
%%
%%
%% Description: Adjusts the ssh flowcontrol window.
@@ -151,7 +152,8 @@ adjust_window(ConnectionHandler, Channel, Bytes) ->
ssh_connection_handler:adjust_window(ConnectionHandler, Channel, Bytes).
%%--------------------------------------------------------------------
--spec setenv(pid(), channel_id(), string(), string(), timeout()) -> success | failure.
+-spec setenv(pid(), channel_id(), string(), string(), timeout()) ->
+ success | failure | {error, timeout | closed}.
%%
%%
%% Description: Environment variables may be passed to the shell/command to be
@@ -183,7 +185,11 @@ reply_request(_,false, _, _) ->
ok.
%%--------------------------------------------------------------------
--spec ptty_alloc(pid(), channel_id(), proplists:proplist()) -> success | failiure.
+-spec ptty_alloc(pid(), channel_id(), proplists:proplist()) ->
+ success | failiure | {error, closed}.
+-spec ptty_alloc(pid(), channel_id(), proplists:proplist(), timeout()) ->
+ success | failiure | {error, timeout} | {error, closed}.
+
%%
%%
%% Description: Sends a ssh connection protocol pty_req.
diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl
index fdb9d3b3e6..68523aa72b 100644
--- a/lib/ssh/src/ssh_connection_handler.erl
+++ b/lib/ssh/src/ssh_connection_handler.erl
@@ -289,8 +289,13 @@ renegotiate_data(ConnectionHandler) ->
-spec close(pid(), channel_id()) -> ok.
%%--------------------------------------------------------------------
close(ConnectionHandler, ChannelId) ->
- sync_send_all_state_event(ConnectionHandler, {close, ChannelId}).
-
+ case sync_send_all_state_event(ConnectionHandler, {close, ChannelId}) of
+ ok ->
+ ok;
+ {error, closed} ->
+ ok
+ end.
+
%%--------------------------------------------------------------------
-spec stop(pid()) -> ok | {error, term()}.
%%--------------------------------------------------------------------
@@ -1204,7 +1209,11 @@ sync_send_all_state_event(FsmPid, Event) ->
sync_send_all_state_event(FsmPid, Event, infinity).
sync_send_all_state_event(FsmPid, Event, Timeout) ->
- try gen_fsm:sync_send_all_state_event(FsmPid, Event, Timeout)
+ try gen_fsm:sync_send_all_state_event(FsmPid, Event, Timeout) of
+ {closed, _Channel} ->
+ {error, closed};
+ Result ->
+ Result
catch
exit:{noproc, _} ->
{error, closed};
@@ -1702,7 +1711,7 @@ handshake(Pid, Ref, Timeout) ->
{error, Reason}
after Timeout ->
stop(Pid),
- {error, Timeout}
+ {error, timeout}
end.
start_timeout(_,_, infinity) ->
diff --git a/lib/ssh/src/ssh_sftpd.erl b/lib/ssh/src/ssh_sftpd.erl
index 52665635f0..04ae6b11e2 100644
--- a/lib/ssh/src/ssh_sftpd.erl
+++ b/lib/ssh/src/ssh_sftpd.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2005-2013. All Rights Reserved.
+%% Copyright Ericsson AB 2005-2015. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
@@ -559,56 +559,73 @@ stat(ReqId, RelPath, State0=#state{file_handler=FileMod,
send_status({error, E}, ReqId, State1)
end.
-decode_4_open_flag(create_new) ->
- [write];
-decode_4_open_flag(create_truncate) ->
- [write];
-decode_4_open_flag(truncate_existing) ->
- [write];
-decode_4_open_flag(open_existing) ->
- [read].
-
-decode_4_flags([OpenFlag | Flags]) ->
- decode_4_flags(Flags, decode_4_open_flag(OpenFlag)).
-
-decode_4_flags([], Flags) ->
- Flags;
-decode_4_flags([append_data|R], _Flags) ->
- decode_4_flags(R, [append]);
-decode_4_flags([append_data_atomic|R], _Flags) ->
- decode_4_flags(R, [append]);
-decode_4_flags([_|R], Flags) ->
- decode_4_flags(R, Flags).
-
-decode_4_access_flag(read_data) ->
- [read];
-decode_4_access_flag(list_directory) ->
- [read];
-decode_4_access_flag(write_data) ->
- [write];
-decode_4_access_flag(add_file) ->
- [write];
-decode_4_access_flag(add_subdirectory) ->
- [read];
-decode_4_access_flag(append_data) ->
- [append];
-decode_4_access_flag(write_attributes) ->
- [write];
-decode_4_access_flag(_) ->
- [read].
-
-decode_4_acess([_ | _] = Flags) ->
+sftp_to_erlang_flag(read, Vsn) when Vsn == 3;
+ Vsn == 4 ->
+ read;
+sftp_to_erlang_flag(write, Vsn) when Vsn == 3;
+ Vsn == 4 ->
+ write;
+sftp_to_erlang_flag(append, Vsn) when Vsn == 3;
+ Vsn == 4 ->
+ append;
+sftp_to_erlang_flag(creat, Vsn) when Vsn == 3;
+ Vsn == 4 ->
+ write;
+sftp_to_erlang_flag(trunc, Vsn) when Vsn == 3;
+ Vsn == 4 ->
+ write;
+sftp_to_erlang_flag(excl, Vsn) when Vsn == 3;
+ Vsn == 4 ->
+ read;
+sftp_to_erlang_flag(create_new, Vsn) when Vsn > 4 ->
+ write;
+sftp_to_erlang_flag(create_truncate, Vsn) when Vsn > 4 ->
+ write;
+sftp_to_erlang_flag(open_existing, Vsn) when Vsn > 4 ->
+ read;
+sftp_to_erlang_flag(open_or_create, Vsn) when Vsn > 4 ->
+ write;
+sftp_to_erlang_flag(truncate_existing, Vsn) when Vsn > 4 ->
+ write;
+sftp_to_erlang_flag(append_data, Vsn) when Vsn > 4 ->
+ append;
+sftp_to_erlang_flag(append_data_atomic, Vsn) when Vsn > 4 ->
+ append;
+sftp_to_erlang_flag(_, _) ->
+ read.
+
+sftp_to_erlang_flags(Flags, Vsn) ->
lists:map(fun(Flag) ->
- [decode_4_access_flag(Flag)]
- end, Flags);
-decode_4_acess([]) ->
- [].
+ sftp_to_erlang_flag(Flag, Vsn)
+ end, Flags).
+
+sftp_to_erlang_access_flag(read_data, _) ->
+ read;
+sftp_to_erlang_access_flag(list_directory, _) ->
+ read;
+sftp_to_erlang_access_flag(write_data, _) ->
+ write;
+sftp_to_erlang_access_flag(append_data, _) ->
+ append;
+sftp_to_erlang_access_flag(add_subdirectory, _) ->
+ read;
+sftp_to_erlang_access_flag(add_file, _) ->
+ write;
+sftp_to_erlang_access_flag(write_attributes, _) ->
+ write;
+sftp_to_erlang_access_flag(_, _) ->
+ read.
+sftp_to_erlang_access_flags(Flags, Vsn) ->
+ lists:map(fun(Flag) ->
+ sftp_to_erlang_access_flag(Flag, Vsn)
+ end, Flags).
open(Vsn, ReqId, Data, State) when Vsn =< 3 ->
<<?UINT32(BLen), BPath:BLen/binary, ?UINT32(PFlags),
_Attrs/binary>> = Data,
Path = unicode:characters_to_list(BPath),
- Flags = ssh_xfer:decode_open_flags(Vsn, PFlags),
+ FlagBits = ssh_xfer:decode_open_flags(Vsn, PFlags),
+ Flags = lists:usort(sftp_to_erlang_flags(FlagBits, Vsn)),
do_open(ReqId, State, Path, Flags);
open(Vsn, ReqId, Data, State) when Vsn >= 4 ->
<<?UINT32(BLen), BPath:BLen/binary, ?UINT32(Access),
@@ -616,15 +633,12 @@ open(Vsn, ReqId, Data, State) when Vsn >= 4 ->
Path = unicode:characters_to_list(BPath),
FlagBits = ssh_xfer:decode_open_flags(Vsn, PFlags),
AcessBits = ssh_xfer:decode_ace_mask(Access),
- %% TODO: This is to make sure the Access flags are not ignored
- %% but this should be thought through better. This solution should
- %% be considered a hack in order to buy some time. At least
- %% it works better than when the Access flags where totally ignored.
- %% A better solution may need some code refactoring that we do
- %% not have time for right now.
- AcessFlags = decode_4_acess(AcessBits),
- Flags = lists:append(lists:umerge(
- [[decode_4_flags(FlagBits)] | AcessFlags])),
+ %% TODO: There are still flags that are not
+ %% fully handled as SSH_FXF_ACCESS_TEXT_MODE and
+ %% a lot a ACE flags, the later we may not need
+ %% to understand as they are NFS flags
+ AcessFlags = sftp_to_erlang_access_flags(AcessBits, Vsn),
+ Flags = lists:usort(sftp_to_erlang_flags(FlagBits, Vsn) ++ AcessFlags),
do_open(ReqId, State, Path, Flags).
do_open(ReqId, State0, Path, Flags) ->
diff --git a/lib/ssh/test/ssh_basic_SUITE.erl b/lib/ssh/test/ssh_basic_SUITE.erl
index 415cb9fc9c..cb1b4ae945 100644
--- a/lib/ssh/test/ssh_basic_SUITE.erl
+++ b/lib/ssh/test/ssh_basic_SUITE.erl
@@ -723,7 +723,7 @@ ssh_connect_arg4_timeout(_Config) ->
%% Wait for client reaction on the connection try:
receive
- {done, Client, {error,_E}, T0} ->
+ {done, Client, {error,timeout}, T0} ->
Msp = ms_passed(T0, now()),
exit(Server,hasta_la_vista___baby),
Low = 0.9*Timeout,
@@ -733,6 +733,11 @@ ssh_connect_arg4_timeout(_Config) ->
Low<Msp, Msp<High -> ok;
true -> {fail, "timeout not within limits"}
end;
+
+ {done, Client, {error,Other}, _T0} ->
+ ct:log("Error message \"~p\" from the client is unexpected.",[{error,Other}]),
+ {fail, "Unexpected error message"};
+
{done, Client, {ok,_Ref}, _T0} ->
{fail,"ssh-connected ???"}
after
diff --git a/lib/ssh/test/ssh_connection_SUITE.erl b/lib/ssh/test/ssh_connection_SUITE.erl
index 85bd2c75d4..e3871b3feb 100644
--- a/lib/ssh/test/ssh_connection_SUITE.erl
+++ b/lib/ssh/test/ssh_connection_SUITE.erl
@@ -37,7 +37,6 @@
all() ->
[
{group, openssh},
- {group, openssh_payload},
interrupted_send,
start_shell,
start_shell_exec,
@@ -46,7 +45,8 @@ all() ->
gracefull_invalid_start,
gracefull_invalid_long_start,
gracefull_invalid_long_start_no_nl,
- stop_listener
+ stop_listener,
+ start_subsystem_on_closed_channel
].
groups() ->
[{openssh, [], payload() ++ ptty()}].
@@ -576,6 +576,31 @@ stop_listener(Config) when is_list(Config) ->
ct:fail({unexpected, Error})
end.
+start_subsystem_on_closed_channel(Config) ->
+ PrivDir = ?config(priv_dir, Config),
+ UserDir = filename:join(PrivDir, nopubkey), % to make sure we don't use public-key-auth
+ file:make_dir(UserDir),
+ SysDir = ?config(data_dir, Config),
+ {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SysDir},
+ {user_dir, UserDir},
+ {password, "morot"},
+ {subsystems, [{"echo_n", {ssh_echo_server, [4000000]}}]}]),
+
+ ConnectionRef = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
+ {user, "foo"},
+ {password, "morot"},
+ {user_interaction, false},
+ {user_dir, UserDir}]),
+
+ {ok, ChannelId} = ssh_connection:session_channel(ConnectionRef, infinity),
+
+ ok = ssh_connection:close(ConnectionRef, ChannelId),
+
+ {error, closed} = ssh_connection:subsystem(ConnectionRef, ChannelId, "echo_n", infinity),
+
+ ssh:close(ConnectionRef),
+ ssh:stop_daemon(Pid).
+
%%--------------------------------------------------------------------
%% Internal functions ------------------------------------------------
%%--------------------------------------------------------------------
diff --git a/lib/ssh/test/ssh_sftpd_SUITE.erl b/lib/ssh/test/ssh_sftpd_SUITE.erl
index 7b22e45d5e..0ce8eec906 100644
--- a/lib/ssh/test/ssh_sftpd_SUITE.erl
+++ b/lib/ssh/test/ssh_sftpd_SUITE.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2006-2013. All Rights Reserved.
+%% Copyright Ericsson AB 2006-2015. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
@@ -56,7 +56,8 @@ all() ->
retrieve_attributes,
set_attributes,
links,
- ver3_rename,
+ ver3_rename,
+ ver3_open_flags,
relpath,
sshd_read_file,
ver6_basic].
@@ -193,6 +194,39 @@ open_close_file(Config) when is_list(Config) ->
?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 = ?config(priv_dir, Config),
+ FileName = filename:join(PrivDir, "not_exist.txt"),
+ {Cm, Channel} = ?config(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"}].
@@ -662,6 +696,16 @@ open_file(File, Cm, Channel, ReqId, Access, Flags) ->
?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) ->