diff options
Diffstat (limited to 'lib/ssh/src/ssh_acceptor.erl')
| -rw-r--r-- | lib/ssh/src/ssh_acceptor.erl | 77 |
1 files changed, 56 insertions, 21 deletions
diff --git a/lib/ssh/src/ssh_acceptor.erl b/lib/ssh/src/ssh_acceptor.erl index 91905b2eaf..c5ad1d7b6c 100644 --- a/lib/ssh/src/ssh_acceptor.erl +++ b/lib/ssh/src/ssh_acceptor.erl @@ -1,18 +1,19 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2008-2013. All Rights Reserved. +%% Copyright Ericsson AB 2008-2015. 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 -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved online at http://www.erlang.org/. +%% 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 %% -%% Software distributed under the License is distributed on an "AS IS" -%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See -%% the License for the specific language governing rights and limitations -%% under the License. +%% 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% %% @@ -21,8 +22,11 @@ -module(ssh_acceptor). +-include("ssh.hrl"). + %% Internal application API --export([start_link/5]). +-export([start_link/5, + number_of_connections/1]). %% spawn export -export([acceptor_init/6, acceptor_loop/6]). @@ -42,7 +46,7 @@ start_link(Port, Address, SockOpts, Opts, AcceptTimeout) -> acceptor_init(Parent, Port, Address, SockOpts, Opts, AcceptTimeout) -> {_, Callback, _} = proplists:get_value(transport, Opts, {tcp, gen_tcp, tcp_closed}), - case (catch do_socket_listen(Callback, Port, SockOpts)) of + case (catch do_socket_listen(Callback, Port, [{active, false} | SockOpts])) of {ok, ListenSocket} -> proc_lib:init_ack(Parent, {ok, self()}), acceptor_loop(Callback, @@ -80,15 +84,38 @@ acceptor_loop(Callback, Port, Address, Opts, ListenSocket, AcceptTimeout) -> ListenSocket, AcceptTimeout) end. -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), - ssh_connection_handler:start_connection(server, Socket, - [{supervisors, [{system_sup, SystemSup}, - {subsystem_sup, SubSysSup}, - {connection_sup, ConnectionSup}]} - | Options], infinity). +handle_connection(Callback, Address, Port, Options, Socket) -> + SSHopts = proplists:get_value(ssh_opts, Options, []), + Profile = proplists:get_value(profile, SSHopts, ?DEFAULT_PROFILE), + SystemSup = ssh_system_sup:system_supervisor(Address, Port, Profile), + + 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; @@ -114,3 +141,11 @@ 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_pid(X), + is_reference(R) + ]). |