%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2008-2016. 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%
%%
%%
%%----------------------------------------------------------------------
%% Purpose: The ssh subsystem supervisor
%%----------------------------------------------------------------------
-module(ssh_subsystem_sup).
-behaviour(supervisor).
-export([start_link/1,
connection_supervisor/1,
channel_supervisor/1
]).
%% Supervisor callback
-export([init/1]).
%%%=========================================================================
%%% API
%%%=========================================================================
start_link(Opts) ->
supervisor:start_link(?MODULE, [Opts]).
connection_supervisor(SupPid) ->
Children = supervisor:which_children(SupPid),
ssh_connection_sup(Children).
channel_supervisor(SupPid) ->
Children = supervisor:which_children(SupPid),
ssh_channel_sup(Children).
%%%=========================================================================
%%% Supervisor callback
%%%=========================================================================
-spec init( [term()] ) -> {ok,{supervisor:sup_flags(),[supervisor:child_spec()]}} | ignore .
init([Opts]) ->
RestartStrategy = one_for_all,
MaxR = 0,
MaxT = 3600,
Children = child_specs(Opts),
{ok, {{RestartStrategy, MaxR, MaxT}, Children}}.
%%%=========================================================================
%%% Internal functions
%%%=========================================================================
child_specs(Opts) ->
case proplists:get_value(role, Opts) of
client ->
[];
server ->
[ssh_channel_child_spec(Opts), ssh_connectinon_child_spec(Opts)]
end.
ssh_connectinon_child_spec(Opts) ->
Address = proplists:get_value(address, Opts),
Port = proplists:get_value(port, Opts),
Role = proplists:get_value(role, Opts),
Name = id(Role, ssh_connection_sup, Address, Port),
StartFunc = {ssh_connection_sup, start_link, [Opts]},
Restart = temporary,
Shutdown = 5000,
Modules = [ssh_connection_sup],
Type = supervisor,
{Name, StartFunc, Restart, Shutdown, Type, Modules}.
ssh_channel_child_spec(Opts) ->
Address = proplists:get_value(address, Opts),
Port = proplists:get_value(port, Opts),
Role = proplists:get_value(role, Opts),
Name = id(Role, ssh_channel_sup, Address, Port),
StartFunc = {ssh_channel_sup, start_link, [Opts]},
Restart = temporary,
Shutdown = infinity,
Modules = [ssh_channel_sup],
Type = supervisor,
{Name, StartFunc, Restart, Shutdown, Type, Modules}.
id(Role, Sup, Address, Port) ->
{Role, Sup, Address, Port}.
ssh_connection_sup([{_, Child, _, [ssh_connection_sup]} | _]) ->
Child;
ssh_connection_sup([_ | Rest]) ->
ssh_connection_sup(Rest).
ssh_channel_sup([{_, Child, _, [ssh_channel_sup]} | _]) ->
Child;
ssh_channel_sup([_ | Rest]) ->
ssh_channel_sup(Rest).
