diff options
Diffstat (limited to 'lib/ssh/src')
| -rw-r--r-- | lib/ssh/src/ssh.erl | 9 | ||||
| -rw-r--r-- | lib/ssh/src/ssh_acceptor.erl | 47 | ||||
| -rw-r--r-- | lib/ssh/src/ssh_connection_handler.erl | 3 |
3 files changed, 44 insertions, 15 deletions
diff --git a/lib/ssh/src/ssh.erl b/lib/ssh/src/ssh.erl index de6e8cc421..240de69eff 100644 --- a/lib/ssh/src/ssh.erl +++ b/lib/ssh/src/ssh.erl @@ -1,7 +1,7 @@ % %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2004-2013. All Rights Reserved. +%% Copyright Ericsson AB 2004-2014. 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 @@ -73,8 +73,9 @@ connect(Host, Port, Options, Timeout) -> {SocketOptions, SshOptions} -> {_, Transport, _} = TransportOpts = proplists:get_value(transport, Options, {tcp, gen_tcp, tcp_closed}), + ConnectionTimeout = proplists:get_value(connect_timeout, Options, infinity), Inet = proplists:get_value(inet, SshOptions, inet), - try Transport:connect(Host, Port, [ {active, false}, Inet | SocketOptions], Timeout) of + try Transport:connect(Host, Port, [ {active, false}, Inet | SocketOptions], ConnectionTimeout) of {ok, Socket} -> Opts = [{user_pid, self()}, {host, Host} | fix_idle_time(SshOptions)], ssh_connection_handler:start_connection(client, Socket, Opts, Timeout); @@ -332,6 +333,8 @@ handle_option([{idle_time, _} = Opt | Rest], SocketOptions, SshOptions) -> handle_option(Rest, SocketOptions, [handle_ssh_option(Opt) | SshOptions]); handle_option([{rekey_limit, _} = Opt|Rest], SocketOptions, SshOptions) -> handle_option(Rest, SocketOptions, [handle_ssh_option(Opt) | SshOptions]); +handle_option([{max_sessions, _} = Opt|Rest], SocketOptions, SshOptions) -> + handle_option(Rest, SocketOptions, [handle_ssh_option(Opt) | SshOptions]); handle_option([{negotiation_timeout, _} = Opt|Rest], SocketOptions, SshOptions) -> handle_option(Rest, SocketOptions, [handle_ssh_option(Opt) | SshOptions]); handle_option([{parallel_login, _} = Opt|Rest], SocketOptions, SshOptions) -> @@ -366,6 +369,8 @@ handle_ssh_option({pref_public_key_algs, Value} = Opt) when is_list(Value), leng end; handle_ssh_option({connect_timeout, Value} = Opt) when is_integer(Value); Value == infinity -> Opt; +handle_ssh_option({max_sessions, Value} = Opt) when is_integer(Value), Value>0 -> + Opt; handle_ssh_option({negotiation_timeout, Value} = Opt) when is_integer(Value); Value == infinity -> Opt; handle_ssh_option({parallel_login, Value} = Opt) when Value==true ; Value==false -> diff --git a/lib/ssh/src/ssh_acceptor.erl b/lib/ssh/src/ssh_acceptor.erl index e57b07cee8..7302196674 100644 --- a/lib/ssh/src/ssh_acceptor.erl +++ b/lib/ssh/src/ssh_acceptor.erl @@ -80,18 +80,36 @@ acceptor_loop(Callback, Port, Address, Opts, ListenSocket, AcceptTimeout) -> ListenSocket, AcceptTimeout) end. -handle_connection(_Callback, Address, Port, Options, Socket) -> +handle_connection(Callback, Address, Port, Options, Socket) -> SystemSup = ssh_system_sup:system_supervisor(Address, Port), - {ok, SubSysSup} = ssh_system_sup:start_subsystem(SystemSup, Options), - ConnectionSup = ssh_subsystem_sup:connection_supervisor(SubSysSup), - Timeout = proplists:get_value(negotiation_timeout, - proplists:get_value(ssh_opts, Options, []), - 2*60*1000), - ssh_connection_handler:start_connection(server, Socket, - [{supervisors, [{system_sup, SystemSup}, - {subsystem_sup, SubSysSup}, - {connection_sup, ConnectionSup}]} - | Options], Timeout). + SSHopts = proplists:get_value(ssh_opts, Options, []), + MaxSessions = proplists:get_value(max_sessions,SSHopts,infinity), + case number_of_connections(SystemSup) < MaxSessions of + true -> + {ok, SubSysSup} = ssh_system_sup:start_subsystem(SystemSup, Options), + ConnectionSup = ssh_subsystem_sup:connection_supervisor(SubSysSup), + Timeout = proplists:get_value(negotiation_timeout, SSHopts, 2*60*1000), + ssh_connection_handler:start_connection(server, Socket, + [{supervisors, [{system_sup, SystemSup}, + {subsystem_sup, SubSysSup}, + {connection_sup, ConnectionSup}]} + | Options], Timeout); + false -> + Callback:close(Socket), + IPstr = if is_tuple(Address) -> inet:ntoa(Address); + true -> Address + end, + Str = try io_lib:format('~s:~p',[IPstr,Port]) + catch _:_ -> "port "++integer_to_list(Port) + end, + error_logger:info_report("Ssh login attempt to "++Str++" denied due to option " + "max_sessions limits to "++ io_lib:write(MaxSessions) ++ + " sessions." + ), + {error,max_sessions} + end. + + handle_error(timeout) -> ok; @@ -117,3 +135,10 @@ handle_error(Reason) -> String = lists:flatten(io_lib:format("Accept error: ~p", [Reason])), error_logger:error_report(String), exit({accept_failed, String}). + + +number_of_connections(SystemSup) -> + length([X || + {R,X,supervisor,[ssh_subsystem_sup]} <- supervisor:which_children(SystemSup), + is_reference(R) + ]). diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl index 322da50f21..06866392da 100644 --- a/lib/ssh/src/ssh_connection_handler.erl +++ b/lib/ssh/src/ssh_connection_handler.erl @@ -1482,8 +1482,7 @@ ssh_channel_info([ _ | Rest], Channel, Acc) -> log_error(Reason) -> Report = io_lib:format("Erlang ssh connection handler failed with reason: " - "~p ~n, Stacktace: ~p ~n" - "please report this to [email protected] \n", + "~p ~n, Stacktrace: ~p ~n", [Reason, erlang:get_stacktrace()]), error_logger:error_report(Report), "Internal error". |