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% 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.
-module(couch_dist).
-export([
childspecs/0,
listen/2,
accept/1,
accept_connection/5,
setup/5,
close/1,
select/1,
is_node_name/1
]).
% Just for tests
-export([no_tls/1, get_init_args/0]).
childspecs() ->
{ok, [
{ssl_dist_sup, {ssl_dist_sup, start_link, []}, permanent, infinity, supervisor, [
ssl_dist_sup
]}
]}.
listen(Name, Host) ->
NodeName =
case is_atom(Name) of
true -> atom_to_list(Name);
false -> Name
end,
Mod = inet_dist(NodeName ++ "@" ++ Host),
Mod:listen(NodeName, Host).
accept(Listen) ->
Mod = inet_dist(node()),
Mod:accept(Listen).
accept_connection(AcceptPid, DistCtrl, MyNode, Allowed, SetupTime) ->
Mod = inet_dist(MyNode),
Mod:accept_connection(AcceptPid, DistCtrl, MyNode, Allowed, SetupTime).
setup(Node, Type, MyNode, LongOrShortNames, SetupTime) ->
Mod = inet_dist(Node),
Mod:setup(Node, Type, MyNode, LongOrShortNames, SetupTime).
close(Socket) ->
inet_tls_dist:close(Socket).
select(Node) ->
inet_tls_dist:select(Node).
is_node_name(Node) ->
inet_tls_dist:is_node_name(Node).
get_init_args() ->
init:get_argument(couch_dist).
inet_dist(Node) ->
case no_tls(Node) of
true -> inet_tcp_dist;
false -> inet_tls_dist
end.
no_tls(NodeName) when is_atom(NodeName) ->
no_tls(atom_to_list(NodeName));
no_tls(NodeName) when is_list(NodeName) ->
case ?MODULE:get_init_args() of
{ok, Args} ->
GlobPatterns = [V || [K, V] <- Args, K == "no_tls"],
lists:any(fun(P) -> match(NodeName, P) end, GlobPatterns);
error ->
false
end.
match(_NodeName, "true") ->
true;
match(_NodeName, "false") ->
false;
match(NodeName, Pattern) ->
{ok, RE} =
case string:split(Pattern, [$"], all) of
["", GlobPattern, ""] -> to_re(GlobPattern);
_ -> to_re(Pattern)
end,
re:run(NodeName, RE) /= nomatch.
to_re(GlobPattern) ->
re:compile([$^, lists:flatmap(fun glob_re/1, GlobPattern), $$]).
glob_re($*) ->
".*";
glob_re($?) ->
".";
glob_re(C) ->
[C].
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