File 4921-ssh-Implement-max_initial_idle_time.patch of Package erlang

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File 4921-ssh-Implement-max_initial_idle_time.patch of Package erlang (Revision a348a67ba66c7a948f8268ea2bae17d0)

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From e8406a80f09f52e6c27d3340487f09430eb23de1 Mon Sep 17 00:00:00 2001
From: Hans Nilsson <hans@erlang.org>
Date: Thu, 18 Aug 2022 16:07:23 +0200
Subject: [PATCH 1/2] ssh: Implement max_initial_idle_time

---
 lib/ssh/src/ssh.hrl                     |  2 ++
 lib/ssh/src/ssh_connection_handler.erl  |  8 +++++++-
 lib/ssh/src/ssh_fsm_userauth_server.erl | 26 +++++++++++++++++++++----
 lib/ssh/src/ssh_options.erl             |  6 ++++++
 lib/ssh/test/ssh_basic_SUITE.erl        | 24 ++++++++++++++++++++++-
 5 files changed, 60 insertions(+), 6 deletions(-)

diff --git a/lib/ssh/src/ssh.hrl b/lib/ssh/src/ssh.hrl
index 796a35bbb8..c6d1d9d086 100644
--- a/lib/ssh/src/ssh.hrl
+++ b/lib/ssh/src/ssh.hrl
@@ -322,6 +322,7 @@
       | tcpip_tunnel_in_daemon_option()
       | authentication_daemon_options()
       | diffie_hellman_group_exchange_daemon_option()
+      | max_initial_idle_time_daemon_option()
       | negotiation_timeout_daemon_option()
       | hello_timeout_daemon_option()
       | hardening_daemon_options()
@@ -392,6 +393,7 @@
 -type explicit_group_file() :: {file,string()} .
 -type ssh_moduli_file() :: {ssh_moduli_file,string()}.
 
+-type max_initial_idle_time_daemon_option() :: {max_initial_idle_time, timeout()} .
 -type negotiation_timeout_daemon_option() :: {negotiation_timeout, timeout()} .
 -type hello_timeout_daemon_option() :: {hello_timeout, timeout()} .
 
diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl
index bd98aaddc0..849f4b46d2 100644
--- a/lib/ssh/src/ssh_connection_handler.erl
+++ b/lib/ssh/src/ssh_connection_handler.erl
@@ -1118,7 +1118,10 @@ handle_event(info, {Proto, Sock, NewData}, StateName, D0 = #data{socket = Sock,
                 #ssh_msg_global_request{}            = Msg -> {keep_state, D1, ?CONNECTION_MSG(Msg)};
                 #ssh_msg_request_success{}           = Msg -> {keep_state, D1, ?CONNECTION_MSG(Msg)};
                 #ssh_msg_request_failure{}           = Msg -> {keep_state, D1, ?CONNECTION_MSG(Msg)};
-                #ssh_msg_channel_open{}              = Msg -> {keep_state, D1, ?CONNECTION_MSG(Msg)};
+                #ssh_msg_channel_open{}              = Msg -> {keep_state, D1,
+                                                               [{{timeout, max_initial_idle_time}, cancel} |
+                                                                ?CONNECTION_MSG(Msg)
+                                                               ]};
                 #ssh_msg_channel_open_confirmation{} = Msg -> {keep_state, D1, ?CONNECTION_MSG(Msg)};
                 #ssh_msg_channel_open_failure{}      = Msg -> {keep_state, D1, ?CONNECTION_MSG(Msg)};
                 #ssh_msg_channel_window_adjust{}     = Msg -> {keep_state, D1, ?CONNECTION_MSG(Msg)};
@@ -1232,6 +1235,9 @@ handle_event({timeout,idle_time}, _Data,  _StateName, D) ->
             keep_state_and_data
     end;
 
+handle_event({timeout,max_initial_idle_time}, _Data,  _StateName, _D) ->
+    {stop, {shutdown, "Timeout"}};
+
 %%% So that terminate will be run when supervisor is shutdown
 handle_event(info, {'EXIT', _Sup, Reason}, StateName, _D) ->
     Role = ?role(StateName),
diff --git a/lib/ssh/src/ssh_fsm_userauth_server.erl b/lib/ssh/src/ssh_fsm_userauth_server.erl
index 0d12cb43ec..9a64df4545 100644
--- a/lib/ssh/src/ssh_fsm_userauth_server.erl
+++ b/lib/ssh/src/ssh_fsm_userauth_server.erl
@@ -71,7 +71,12 @@ handle_event(internal,
                     {keep_state, D};
                 {authorized, User, {Reply, Ssh1}} ->
                     D = connected_state(Reply, Ssh1, User, Method, D0),
-                    {next_state, {connected,server}, D, {change_callback_module,ssh_connection_handler}}
+                    {next_state, {connected,server}, D,
+                     [set_max_initial_idle_timeout(D),
+                      {change_callback_module,ssh_connection_handler}
+                     ]
+                    }
+                     
             end;
 	
 	{"ssh-connection", "ssh-connection", Method} ->
@@ -82,7 +87,10 @@ handle_event(internal,
 		    case ssh_auth:handle_userauth_request(Msg, Ssh0#ssh.session_id, Ssh0) of
 			{authorized, User, {Reply, Ssh1}} ->
                             D = connected_state(Reply, Ssh1, User, Method, D0),
-                            {next_state, {connected,server}, D, {change_callback_module,ssh_connection_handler}};
+                            {next_state, {connected,server}, D,
+                             [set_max_initial_idle_timeout(D),
+                              {change_callback_module,ssh_connection_handler}
+                             ]};
 			{not_authorized, {User, Reason}, {Reply, Ssh}} when Method == "keyboard-interactive" ->
 			    retry_fun(User, Reason, D0),
                             D = ssh_connection_handler:send_msg(Reply, D0#data{ssh_params = Ssh}),
@@ -115,7 +123,10 @@ handle_event(internal, #ssh_msg_userauth_info_response{} = Msg, {userauth_keyboa
     case ssh_auth:handle_userauth_info_response(Msg, D0#data.ssh_params) of
 	{authorized, User, {Reply, Ssh1}} ->
             D = connected_state(Reply, Ssh1, User, "keyboard-interactive", D0),
-            {next_state, {connected,server}, D, {change_callback_module,ssh_connection_handler}};
+            {next_state, {connected,server}, D,
+             [set_max_initial_idle_timeout(D),
+              {change_callback_module,ssh_connection_handler}
+             ]};
 	{not_authorized, {User, Reason}, {Reply, Ssh}} ->
 	    retry_fun(User, Reason, D0),
             D = ssh_connection_handler:send_msg(Reply, D0#data{ssh_params = Ssh}),
@@ -130,7 +141,11 @@ handle_event(internal, #ssh_msg_userauth_info_response{} = Msg, {userauth_keyboa
     {authorized, User, {Reply, Ssh1}} =
         ssh_auth:handle_userauth_info_response({extra,Msg}, D0#data.ssh_params),
     D = connected_state(Reply, Ssh1, User, "keyboard-interactive", D0),
-    {next_state, {connected,server}, D, {change_callback_module,ssh_connection_handler}};
+    {next_state, {connected,server}, D,
+     [set_max_initial_idle_timeout(D),
+      {change_callback_module,ssh_connection_handler}
+     ]
+    };
 
 
 %%% ######## UNHANDLED EVENT!
@@ -164,6 +179,9 @@ connected_state(Reply, Ssh1, User, Method, D0) ->
             ssh_params = Ssh#ssh{authenticated = true}}.
 
 
+set_max_initial_idle_timeout(#data{ssh_params = #ssh{opts=Opts}}) ->
+    {{timeout,max_initial_idle_time}, ?GET_OPT(max_initial_idle_time,Opts), none}.
+
 connected_fun(User, Method, #data{ssh_params = #ssh{peer = {_,Peer}}} = D) ->
     ?CALL_FUN(connectfun,D)(User, Peer, Method).
 
diff --git a/lib/ssh/src/ssh_options.erl b/lib/ssh/src/ssh_options.erl
index 9e06ddb7de..2acc46807b 100644
--- a/lib/ssh/src/ssh_options.erl
+++ b/lib/ssh/src/ssh_options.erl
@@ -533,6 +533,12 @@ default(server) ->
             class => user_option
            },
 
+      max_initial_idle_time =>
+          #{default => infinity, %% To not break compatibility
+            chk => fun(V) -> check_timeout(V) end,
+            class => user_option
+           },
+
       negotiation_timeout =>
           #{default => 2*60*1000,
             chk => fun(V) -> check_timeout(V) end,
diff --git a/lib/ssh/test/ssh_basic_SUITE.erl b/lib/ssh/test/ssh_basic_SUITE.erl
index cc74d5e725..a508d08613 100644
--- a/lib/ssh/test/ssh_basic_SUITE.erl
+++ b/lib/ssh/test/ssh_basic_SUITE.erl
@@ -74,6 +74,7 @@
          login_bad_pwd_no_retry3/1,
          login_bad_pwd_no_retry4/1,
          login_bad_pwd_no_retry5/1,
+         max_initial_idle_time/1,
          misc_ssh_options/1,
          multi_daemon_opt_fd/1,
          openssh_zlib_basic_test/1,
@@ -155,7 +156,9 @@ groups() ->
                              exec, exec_compressed, 
                              exec_with_io_out, exec_with_io_in,
                              cli, cli_exit_normal, cli_exit_status,
-                             idle_time_client, idle_time_server, openssh_zlib_basic_test, 
+                             idle_time_client, idle_time_server,
+                             max_initial_idle_time,
+                             openssh_zlib_basic_test,
                              misc_ssh_options, inet_option, inet6_option,
                              shell, shell_socket, shell_ssh_conn, shell_no_unicode, shell_unicode_string,
                              close
@@ -471,6 +474,25 @@ idle_time_common(DaemonExtraOpts, ClientExtraOpts, Config) ->
     end,
     ssh:stop_daemon(Pid).
 
+%%--------------------------------------------------------------------
+max_initial_idle_time(Config) ->
+    SystemDir = filename:join(proplists:get_value(priv_dir, Config), system),
+    UserDir = proplists:get_value(priv_dir, Config),
+
+    {Pid, Host, Port} = ssh_test_lib:daemon([{system_dir, SystemDir},
+					     {user_dir, UserDir},
+					     {failfun, fun ssh_test_lib:failfun/2},
+                                             {max_initial_idle_time, 2000}
+                                            ]),
+    ConnectionRef =
+	ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
+					  {user_dir, UserDir},
+					  {user_interaction, false}
+                                         ]),
+    timer:sleep(8000),
+    {error, closed} = ssh_connection:session_channel(ConnectionRef, 1000),
+    ssh:stop_daemon(Pid).
+
 %%--------------------------------------------------------------------
 %%% Test that ssh:shell/2 works
 shell(Config) when is_list(Config) ->
-- 
2.35.3

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File 4921-ssh-Implement-max_initial_idle_time.patch of Package erlang (Revision a348a67ba66c7a948f8268ea2bae17d0)

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