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-rw-r--r--lib/ssl/test/ssl_basic_SUITE.erl91
-rw-r--r--lib/ssl/test/ssl_certificate_verify_SUITE.erl92
-rw-r--r--lib/ssl/test/ssl_test_lib.erl111
-rw-r--r--lib/ssl/test/ssl_to_openssl_SUITE.erl8
4 files changed, 249 insertions, 53 deletions
diff --git a/lib/ssl/test/ssl_basic_SUITE.erl b/lib/ssl/test/ssl_basic_SUITE.erl
index ed1763b92a..fe4f02f100 100644
--- a/lib/ssl/test/ssl_basic_SUITE.erl
+++ b/lib/ssl/test/ssl_basic_SUITE.erl
@@ -164,7 +164,10 @@ api_tests() ->
accept_pool,
prf,
socket_options,
- cipher_suites
+ cipher_suites,
+ handshake_continue,
+ hello_client_cancel,
+ hello_server_cancel
].
api_tests_tls() ->
@@ -630,6 +633,84 @@ new_options_in_accept(Config) when is_list(Config) ->
ssl_test_lib:close(Server),
ssl_test_lib:close(Client).
+
+%%--------------------------------------------------------------------
+handshake_continue() ->
+ [{doc, "Test API function ssl:handshake_continue/3"}].
+handshake_continue(Config) when is_list(Config) ->
+ ClientOpts = ssl_test_lib:ssl_options(client_verification_opts, Config),
+ ServerOpts = ssl_test_lib:ssl_options(server_verification_opts, Config),
+ {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+
+ Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+ {from, self()},
+ {mfa, {ssl_test_lib, send_recv_result_active, []}},
+ {options, ssl_test_lib:ssl_options([{reuseaddr, true}, {handshake, hello}],
+ Config)},
+ {continue_options, proplists:delete(reuseaddr, ServerOpts)}
+ ]),
+
+ Port = ssl_test_lib:inet_port(Server),
+
+ Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
+ {host, Hostname},
+ {from, self()},
+ {mfa, {ssl_test_lib, send_recv_result_active, []}},
+ {options, ssl_test_lib:ssl_options([{handshake, hello}],
+ Config)},
+ {continue_options, proplists:delete(reuseaddr, ClientOpts)}]),
+
+ ssl_test_lib:check_result(Server, ok, Client, ok),
+
+ ssl_test_lib:close(Server),
+ ssl_test_lib:close(Client).
+
+%%--------------------------------------------------------------------
+hello_client_cancel() ->
+ [{doc, "Test API function ssl:handshake_cancel/1 on the client side"}].
+hello_client_cancel(Config) when is_list(Config) ->
+ ServerOpts = ssl_test_lib:ssl_options(server_verification_opts, Config),
+ ServerOpts = ssl_test_lib:ssl_options(server_verification_opts, Config),
+ {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+
+ Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+ {from, self()},
+ {options, ssl_test_lib:ssl_options([{handshake, hello}], Config)},
+ {continue_options, proplists:delete(reuseaddr, ServerOpts)}]),
+
+ Port = ssl_test_lib:inet_port(Server),
+
+ %% That is ssl:handshake_cancel returns ok
+ {connect_failed, ok} = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
+ {host, Hostname},
+ {from, self()},
+ {options, ssl_test_lib:ssl_options([{handshake, hello}], Config)},
+ {continue_options, cancel}]),
+
+ ssl_test_lib:check_result(Server, {error, {tls_alert, "user canceled"}}).
+%%--------------------------------------------------------------------
+
+hello_server_cancel() ->
+ [{doc, "Test API function ssl:handshake_cancel/1 on the server side"}].
+hello_server_cancel(Config) when is_list(Config) ->
+ ClientOpts = ssl_test_lib:ssl_options(client_verification_opts, Config),
+ {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+
+ Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+ {from, self()},
+ {options, ssl_test_lib:ssl_options([{handshake, hello}], Config)},
+ {continue_options, cancel}]),
+
+ Port = ssl_test_lib:inet_port(Server),
+
+ {connect_failed, _} = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
+ {host, Hostname},
+ {from, self()},
+ {options, ssl_test_lib:ssl_options([{handshake, hello}], Config)},
+ {continue_options, proplists:delete(reuseaddr, ClientOpts)}]),
+
+ ssl_test_lib:check_result(Server, ok).
+
%%--------------------------------------------------------------------
prf() ->
[{doc,"Test that ssl:prf/5 uses the negotiated PRF."}].
@@ -963,7 +1044,7 @@ controller_dies(Config) when is_list(Config) ->
{mfa, {?MODULE,
controller_dies_result, [self(),
ClientMsg]}},
- {options, [{reuseaddr,true}|ClientOpts]}]),
+ {options, ClientOpts}]),
ct:sleep(?SLEEP), %% so that they are connected
exit(Server, killed),
@@ -988,7 +1069,7 @@ tls_client_closes_socket(Config) when is_list(Config) ->
Connect = fun() ->
{ok, _Socket} = rpc:call(ClientNode, gen_tcp, connect,
- [Hostname, Port, TcpOpts]),
+ [Hostname, Port, [binary]]),
%% Make sure that ssl_accept is called before
%% client process ends and closes socket.
ct:sleep(?SLEEP)
@@ -1812,7 +1893,7 @@ tls_send_close(Config) when is_list(Config) ->
{options, [{active, false} | ServerOpts]}]),
Port = ssl_test_lib:inet_port(Server),
{ok, TcpS} = rpc:call(ClientNode, gen_tcp, connect,
- [Hostname,Port,[binary, {active, false}, {reuseaddr, true}]]),
+ [Hostname,Port,[binary, {active, false}]]),
{ok, SslS} = rpc:call(ClientNode, ssl, connect,
[TcpS,[{active, false}|ClientOpts]]),
@@ -1956,7 +2037,7 @@ tls_upgrade(Config) when is_list(Config) ->
{host, Hostname},
{from, self()},
{mfa, {?MODULE, upgrade_result, []}},
- {tcp_options, TcpOpts},
+ {tcp_options, [binary]},
{ssl_options, ClientOpts}]),
ct:log("Testcase ~p, Client ~p Server ~p ~n",
diff --git a/lib/ssl/test/ssl_certificate_verify_SUITE.erl b/lib/ssl/test/ssl_certificate_verify_SUITE.erl
index 0bc265fa10..1de4c89d7f 100644
--- a/lib/ssl/test/ssl_certificate_verify_SUITE.erl
+++ b/lib/ssl/test/ssl_certificate_verify_SUITE.erl
@@ -40,14 +40,22 @@
%%--------------------------------------------------------------------
all() ->
[
- {group, tls},
- {group, dtls}
+ {group, 'tlsv1.2'},
+ {group, 'tlsv1.1'},
+ {group, 'tlsv1'},
+ {group, 'sslv3'},
+ {group, 'dtlsv1.2'},
+ {group, 'dtlsv1'}
].
groups() ->
[
- {tls, [], all_protocol_groups()},
- {dtls, [], all_protocol_groups()},
+ {'tlsv1.2', [], all_protocol_groups()},
+ {'tlsv1.1', [], all_protocol_groups()},
+ {'tlsv1', [], all_protocol_groups()},
+ {'sslv3', [], all_protocol_groups()},
+ {'dtlsv1.2', [], all_protocol_groups()},
+ {'dtlsv1', [], all_protocol_groups()},
{active, [], tests()},
{active_once, [], tests()},
{passive, [], tests()},
@@ -65,6 +73,7 @@ tests() ->
verify_none,
server_require_peer_cert_ok,
server_require_peer_cert_fail,
+ server_require_peer_cert_empty_ok,
server_require_peer_cert_partial_chain,
server_require_peer_cert_allow_partial_chain,
server_require_peer_cert_do_not_allow_partial_chain,
@@ -104,24 +113,6 @@ end_per_suite(_Config) ->
ssl:stop(),
application:stop(crypto).
-init_per_group(tls, Config0) ->
- Version = tls_record:protocol_version(tls_record:highest_protocol_version([])),
- ssl:stop(),
- application:load(ssl),
- application:set_env(ssl, protocol_version, Version),
- ssl:start(),
- Config = ssl_test_lib:init_tls_version(Version, Config0),
- [{version, tls_record:protocol_version(Version)} | Config];
-
-init_per_group(dtls, Config0) ->
- Version = dtls_record:protocol_version(dtls_record:highest_protocol_version([])),
- ssl:stop(),
- application:load(ssl),
- application:set_env(ssl, protocol_version, Version),
- ssl:start(),
- Config = ssl_test_lib:init_tls_version(Version, Config0),
- [{version, dtls_record:protocol_version(Version)} | Config];
-
init_per_group(active, Config) ->
[{active, true}, {receive_function, send_recv_result_active} | Config];
init_per_group(active_once, Config) ->
@@ -130,15 +121,24 @@ init_per_group(passive, Config) ->
[{active, false}, {receive_function, send_recv_result} | Config];
init_per_group(error_handling, Config) ->
[{active, false}, {receive_function, send_recv_result} | Config];
+init_per_group(GroupName, Config) ->
+ case ssl_test_lib:is_tls_version(GroupName) of
+ true ->
+ case ssl_test_lib:sufficient_crypto_support(GroupName) of
+ true ->
+ [{version, GroupName} | ssl_test_lib:init_tls_version(GroupName, Config)];
+ false ->
+ {skip, "Missing crypto support"}
+ end
+ end.
-init_per_group(_, Config) ->
- Config.
-
-end_per_group(GroupName, Config) when GroupName == tls;
- GroupName == dtls ->
- ssl_test_lib:clean_tls_version(Config);
-end_per_group(_GroupName, Config) ->
- Config.
+end_per_group(GroupName, Config) ->
+ case ssl_test_lib:is_tls_version(GroupName) of
+ true ->
+ ssl_test_lib:clean_tls_version(Config);
+ false ->
+ Config
+ end.
init_per_testcase(_TestCase, Config) ->
ssl:stop(),
@@ -306,6 +306,35 @@ server_require_peer_cert_fail(Config) when is_list(Config) ->
end.
%%--------------------------------------------------------------------
+server_require_peer_cert_empty_ok() ->
+ [{doc,"Test server option fail_if_no_peer_cert when peer sends cert"}].
+
+server_require_peer_cert_empty_ok(Config) when is_list(Config) ->
+ ServerOpts = [{verify, verify_peer}, {fail_if_no_peer_cert, false}
+ | ssl_test_lib:ssl_options(server_rsa_opts, Config)],
+ ClientOpts0 = ssl_test_lib:ssl_options(client_rsa_opts, Config),
+ Active = proplists:get_value(active, Config),
+ ReceiveFunction = proplists:get_value(receive_function, Config),
+ {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
+
+ ClientOpts = proplists:delete(keyfile, proplists:delete(certfile, ClientOpts0)),
+
+ Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
+ {from, self()},
+ {mfa, {ssl_test_lib, ReceiveFunction, []}},
+ {options, [{active, Active} | ServerOpts]}]),
+ Port = ssl_test_lib:inet_port(Server),
+ Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
+ {host, Hostname},
+ {from, self()},
+ {mfa, {ssl_test_lib, ReceiveFunction, []}},
+ {options, [{active, Active} | ClientOpts]}]),
+
+ ssl_test_lib:check_result(Server, ok, Client, ok),
+ ssl_test_lib:close(Server),
+ ssl_test_lib:close(Client).
+
+%%--------------------------------------------------------------------
server_require_peer_cert_partial_chain() ->
[{doc, "Client sends an incompleate chain, by default not acceptable."}].
@@ -930,6 +959,7 @@ client_with_cert_cipher_suites_handshake(Config) when is_list(Config) ->
Config, "_sign_only_extensions"),
ClientOpts = ssl_test_lib:ssl_options(ClientOpts0, Config),
ServerOpts = ssl_test_lib:ssl_options(ServerOpts0, Config),
+ TLSVersion = ssl_test_lib:protocol_version(Config, tuple),
{ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
@@ -938,7 +968,7 @@ client_with_cert_cipher_suites_handshake(Config) when is_list(Config) ->
send_recv_result_active, []}},
{options, [{active, true},
{ciphers,
- ssl_test_lib:rsa_non_signed_suites(proplists:get_value(version, Config))}
+ ssl_test_lib:rsa_non_signed_suites(TLSVersion)}
| ServerOpts]}]),
Port = ssl_test_lib:inet_port(Server),
Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
diff --git a/lib/ssl/test/ssl_test_lib.erl b/lib/ssl/test/ssl_test_lib.erl
index 23b2f3cab5..3a7e844cf8 100644
--- a/lib/ssl/test/ssl_test_lib.erl
+++ b/lib/ssl/test/ssl_test_lib.erl
@@ -79,17 +79,21 @@ run_server(ListenSocket, Opts, N) ->
Pid ! {accepter, N, Server},
run_server(ListenSocket, Opts, N-1).
-do_run_server(_, {error, timeout} = Result, Opts) ->
+do_run_server(_, {error, _} = Result, Opts) ->
+ ct:log("Server error result ~p~n", [Result]),
+ Pid = proplists:get_value(from, Opts),
+ Pid ! {self(), Result};
+do_run_server(_, ok = Result, Opts) ->
+ ct:log("Server cancel result ~p~n", [Result]),
Pid = proplists:get_value(from, Opts),
Pid ! {self(), Result};
-
do_run_server(ListenSocket, AcceptSocket, Opts) ->
Node = proplists:get_value(node, Opts),
Pid = proplists:get_value(from, Opts),
Transport = proplists:get_value(transport, Opts, ssl),
{Module, Function, Args} = proplists:get_value(mfa, Opts),
ct:log("~p:~p~nServer: apply(~p,~p,~p)~n",
- [?MODULE,?LINE, Module, Function, [AcceptSocket | Args]]),
+ [?MODULE,?LINE, Module, Function, [AcceptSocket | Args]]),
case rpc:call(Node, Module, Function, [AcceptSocket | Args]) of
no_result_msg ->
ok;
@@ -117,7 +121,8 @@ connect(#sslsocket{} = ListenSocket, Opts) ->
ReconnectTimes = proplists:get_value(reconnect_times, Opts, 0),
Timeout = proplists:get_value(timeout, Opts, infinity),
SslOpts = proplists:get_value(ssl_extra_opts, Opts, []),
- AcceptSocket = connect(ListenSocket, Node, 1 + ReconnectTimes, dummy, Timeout, SslOpts),
+ ContOpts = proplists:get_value(continue_options, Opts, []),
+ AcceptSocket = connect(ListenSocket, Node, 1 + ReconnectTimes, dummy, Timeout, SslOpts, ContOpts),
case ReconnectTimes of
0 ->
AcceptSocket;
@@ -132,10 +137,45 @@ connect(ListenSocket, Opts) ->
[ListenSocket]),
AcceptSocket.
-connect(_, _, 0, AcceptSocket, _, _) ->
+connect(_, _, 0, AcceptSocket, _, _, _) ->
AcceptSocket;
-
-connect(ListenSocket, Node, N, _, Timeout, []) ->
+connect(ListenSocket, Node, _N, _, Timeout, SslOpts, cancel) ->
+ ct:log("ssl:transport_accept(~p)~n", [ListenSocket]),
+ {ok, AcceptSocket} = rpc:call(Node, ssl, transport_accept,
+ [ListenSocket]),
+ ct:log("~p:~p~nssl:handshake(~p,~p,~p)~n", [?MODULE,?LINE, AcceptSocket, SslOpts,Timeout]),
+
+ case rpc:call(Node, ssl, handshake, [AcceptSocket, SslOpts, Timeout]) of
+ {ok, Socket0, Ext} ->
+ ct:log("Ext ~p:~n", [Ext]),
+ ct:log("~p:~p~nssl:handshake_cancel(~p)~n", [?MODULE,?LINE, Socket0]),
+ rpc:call(Node, ssl, handshake_cancel, [Socket0]);
+ Result ->
+ ct:log("~p:~p~nssl:handshake@~p ret ~p",[?MODULE,?LINE, Node,Result]),
+ Result
+ end;
+connect(ListenSocket, Node, N, _, Timeout, SslOpts, [_|_] =ContOpts) ->
+ ct:log("ssl:transport_accept(~p)~n", [ListenSocket]),
+ {ok, AcceptSocket} = rpc:call(Node, ssl, transport_accept,
+ [ListenSocket]),
+ ct:log("~p:~p~nssl:handshake(~p,~p,~p)~n", [?MODULE,?LINE, AcceptSocket, SslOpts,Timeout]),
+
+ case rpc:call(Node, ssl, handshake, [AcceptSocket, SslOpts, Timeout]) of
+ {ok, Socket0, Ext} ->
+ ct:log("Ext ~p:~n", [Ext]),
+ ct:log("~p:~p~nssl:handshake_continue(~p,~p,~p)~n", [?MODULE,?LINE, Socket0, ContOpts,Timeout]),
+ case rpc:call(Node, ssl, handshake_continue, [Socket0, ContOpts, Timeout]) of
+ {ok, Socket} ->
+ connect(ListenSocket, Node, N-1, Socket, Timeout, SslOpts, ContOpts);
+ Error ->
+ ct:log("~p:~p~nssl:handshake_continue@~p ret ~p",[?MODULE,?LINE, Node,Error]),
+ Error
+ end;
+ Result ->
+ ct:log("~p:~p~nssl:handshake@~p ret ~p",[?MODULE,?LINE, Node,Result]),
+ Result
+ end;
+connect(ListenSocket, Node, N, _, Timeout, [], ContOpts) ->
ct:log("ssl:transport_accept(~p)~n", [ListenSocket]),
{ok, AcceptSocket} = rpc:call(Node, ssl, transport_accept,
[ListenSocket]),
@@ -143,12 +183,12 @@ connect(ListenSocket, Node, N, _, Timeout, []) ->
case rpc:call(Node, ssl, ssl_accept, [AcceptSocket, Timeout]) of
ok ->
- connect(ListenSocket, Node, N-1, AcceptSocket, Timeout, []);
+ connect(ListenSocket, Node, N-1, AcceptSocket, Timeout, [], ContOpts);
Result ->
ct:log("~p:~p~nssl:ssl_accept@~p ret ~p",[?MODULE,?LINE, Node,Result]),
Result
end;
-connect(ListenSocket, Node, _, _, Timeout, Opts) ->
+connect(ListenSocket, Node, _, _, Timeout, Opts, _) ->
ct:log("ssl:transport_accept(~p)~n", [ListenSocket]),
{ok, AcceptSocket} = rpc:call(Node, ssl, transport_accept,
[ListenSocket]),
@@ -187,8 +227,17 @@ run_client(Opts) ->
Pid = proplists:get_value(from, Opts),
Transport = proplists:get_value(transport, Opts, ssl),
Options = proplists:get_value(options, Opts),
+ ContOpts = proplists:get_value(continue_options, Opts, []),
ct:log("~p:~p~n~p:connect(~p, ~p)@~p~n", [?MODULE,?LINE, Transport, Host, Port, Node]),
ct:log("SSLOpts: ~p", [Options]),
+ case ContOpts of
+ [] ->
+ client_loop(Node, Host, Port, Pid, Transport, Options, Opts);
+ _ ->
+ client_cont_loop(Node, Host, Port, Pid, Transport, Options, ContOpts, Opts)
+ end.
+
+client_loop(Node, Host, Port, Pid, Transport, Options, Opts) ->
case rpc:call(Node, Transport, connect, [Host, Port, Options]) of
{ok, Socket} ->
Pid ! {connected, Socket},
@@ -245,6 +294,40 @@ run_client(Opts) ->
Pid ! {connect_failed, {badrpc,BadRPC}}
end.
+client_cont_loop(Node, Host, Port, Pid, Transport, Options, cancel, _Opts) ->
+ case rpc:call(Node, Transport, connect, [Host, Port, Options]) of
+ {ok, Socket, _} ->
+ Result = rpc:call(Node, Transport, handshake_cancel, [Socket]),
+ ct:log("~p:~p~nClient: Cancel: ~p ~n", [?MODULE,?LINE, Result]),
+ Pid ! {connect_failed, Result};
+ {error, Reason} ->
+ ct:log("~p:~p~nClient: connection failed: ~p ~n", [?MODULE,?LINE, Reason]),
+ Pid ! {connect_failed, Reason}
+ end;
+
+client_cont_loop(Node, Host, Port, Pid, Transport, Options, ContOpts, Opts) ->
+ case rpc:call(Node, Transport, connect, [Host, Port, Options]) of
+ {ok, Socket0, _} ->
+ ct:log("~p:~p~nClient: handshake_continue(~p, ~p, infinity) ~n", [?MODULE, ?LINE, Socket0, ContOpts]),
+ case rpc:call(Node, Transport, handshake_continue, [Socket0, ContOpts, infinity]) of
+ {ok, Socket} ->
+ Pid ! {connected, Socket},
+ {Module, Function, Args} = proplists:get_value(mfa, Opts),
+ ct:log("~p:~p~nClient: apply(~p,~p,~p)~n",
+ [?MODULE,?LINE, Module, Function, [Socket | Args]]),
+ case rpc:call(Node, Module, Function, [Socket | Args]) of
+ no_result_msg ->
+ ok;
+ Msg ->
+ ct:log("~p:~p~nClient Msg: ~p ~n", [?MODULE,?LINE, Msg]),
+ Pid ! {self(), Msg}
+ end
+ end;
+ {error, Reason} ->
+ ct:log("~p:~p~nClient: connection failed: ~p ~n", [?MODULE,?LINE, Reason]),
+ Pid ! {connect_failed, Reason}
+ end.
+
close(Pid) ->
ct:log("~p:~p~nClose ~p ~n", [?MODULE,?LINE, Pid]),
Monitor = erlang:monitor(process, Pid),
@@ -1621,7 +1704,9 @@ supports_ssl_tls_version(sslv2 = Version) ->
Exe = "openssl",
Args = ["s_client", VersionFlag],
Port = ssl_test_lib:portable_open_port(Exe, Args),
- do_supports_ssl_tls_version(Port, "")
+ Bool = do_supports_ssl_tls_version(Port, ""),
+ consume_port_exit(Port),
+ Bool
end;
supports_ssl_tls_version(Version) ->
@@ -1739,6 +1824,12 @@ tls_version('dtlsv1.2' = Atom) ->
tls_version(Atom) ->
tls_record:protocol_version(Atom).
+consume_port_exit(OpenSSLPort) ->
+ receive
+ {'EXIT', OpenSSLPort, _} ->
+ ok
+ end.
+
hardcode_rsa_key(1) ->
#'RSAPrivateKey'{
version = 'two-prime',
diff --git a/lib/ssl/test/ssl_to_openssl_SUITE.erl b/lib/ssl/test/ssl_to_openssl_SUITE.erl
index e8cbf857ef..9c60a6315e 100644
--- a/lib/ssl/test/ssl_to_openssl_SUITE.erl
+++ b/lib/ssl/test/ssl_to_openssl_SUITE.erl
@@ -1139,7 +1139,7 @@ ssl2_erlang_server_openssl_client(Config) when is_list(Config) ->
OpenSslPort = ssl_test_lib:portable_open_port(Exe, Args),
ct:log("Ports ~p~n", [[erlang:port_info(P) || P <- erlang:ports()]]),
- consume_port_exit(OpenSslPort),
+ ssl_test_lib:consume_port_exit(OpenSslPort),
ssl_test_lib:check_result(Server, {error, {tls_alert, "bad record mac"}}),
process_flag(trap_exit, false).
@@ -1955,12 +1955,6 @@ openssl_client_args(true, Hostname, Port, ServerName) ->
["s_client", "-no_ssl2", "-connect", Hostname ++ ":" ++
integer_to_list(Port), "-servername", ServerName].
-consume_port_exit(OpenSSLPort) ->
- receive
- {'EXIT', OpenSSLPort, _} ->
- ok
- end.
-
hostname_format(Hostname) ->
case lists:member($., Hostname) of
true ->