inets,tftp: Break out TFTP from inets

- Create directory structure
- Move code, tests, documentation from inets
- Add inets_tftp_wrapper
- Add tftp app to run-dialyzer script

Change-Id: I6a142ae66cecb9a1821cbf9ea6a45f66a836763d

1 files changed, 111 insertions, 0 deletions

diff --git a/lib/tftp/src/tftp_sup.erl b/lib/tftp/src/tftp_sup.erl
new file mode 100644
index 0000000000..0475e53e42
--- /dev/null
+++ b/lib/tftp/src/tftp_sup.erl
@@ -0,0 +1,111 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2005-2016. 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 top supervisor for tftp
+%%----------------------------------------------------------------------
+
+-module(tftp_sup).
+
+-behaviour(supervisor).
+
+%% API
+-export([start_link/1,
+	 start_child/1,
+	 stop_child/1,
+	 which_children/0]).
+
+%% Supervisor callback
+-export([init/1]).
+
+%%%=========================================================================
+%%%  API
+%%%=========================================================================
+
+start_link(TftpServices) ->
+    supervisor:start_link({local, ?MODULE}, ?MODULE, [TftpServices]).
+
+start_child(Options) ->
+    KillAfter = default_kill_after(),
+    ChildSpec = worker_spec(KillAfter, Options),
+    supervisor:start_child(?MODULE, ChildSpec).
+
+stop_child(Pid) when is_pid(Pid) ->
+    Children = supervisor:which_children(?MODULE),
+    case [Id || {Id, P, _Type, _Modules} <- Children, P =:= Pid] of
+	[] ->
+	    {error, not_found};
+	[Id] ->
+	    case supervisor:terminate_child(?MODULE, Id) of
+		ok ->
+		    supervisor:delete_child(?MODULE, Id);
+		{error, not_found} ->
+		    supervisor:delete_child(?MODULE, Id);
+		{error, Reason} ->
+		    {error, Reason}
+	    end
+    end.
+
+which_children() ->
+    Children = supervisor:which_children(?MODULE),
+    [{tftpd, Pid} || {_Id, Pid, _Type, _Modules} <- Children, Pid =/= undefined].
+    
+%%%=========================================================================
+%%%  Supervisor callback
+%%%=========================================================================
+
+init([Services]) when is_list(Services) ->
+    RestartStrategy = one_for_one,
+    MaxR = 10,
+    MaxT = 3600,
+    KillAfter = default_kill_after(),
+    Children = [worker_spec(KillAfter, Options) || {tftpd, Options} <- Services],
+    {ok, {{RestartStrategy, MaxR, MaxT}, Children}}.
+
+%%%=========================================================================
+%%%  Internal functions
+%%%=========================================================================
+
+worker_spec(KillAfter, Options) ->
+    Modules = [proc_lib, tftp, tftp_engine],
+    KA = supervisor_timeout(KillAfter),
+    Name = unique_name(Options),
+    {Name, {tftp, start, [Options]}, permanent, KA, worker, Modules}.
+
+unique_name(Options) ->
+    case lists:keysearch(port, 1, Options) of
+	{value, {_, Port}} when is_integer(Port), Port > 0 -> 
+	    {tftpd, Port};
+	_ ->
+	    {tftpd, erlang:unique_integer([positive])}
+    end.
+
+default_kill_after() ->
+    timer:seconds(3).
+
+%% supervisor_spec(Name) ->
+%%     {Name, {Name, start, []}, permanent, infinity, supervisor,
+%%      [Name, supervisor]}.
+    
+-ifdef(debug_shutdown).
+supervisor_timeout(_KillAfter) -> timer:hours(24).
+-else.
+supervisor_timeout(KillAfter) -> KillAfter.
+-endif.