tests: add a test for the dtls{enc,dec} elements

tests/check/Makefile.am

@@ -164,6 +164,12 @@ else
 check_srtp =
 endif
 
+if USE_DTLS
+check_dtls=elements/dtls
+else
+check_dtls=
+endif
+
 if WITH_GST_PLAYER_TESTS
 check_player = libs/player
 else
@@ -234,6 +240,7 @@ check_PROGRAMS = \
 	generic/states \
 	$(check_assrender) \
 	$(check_dash) \
+	$(check_dtls) \
 	$(check_faac)  \
 	$(check_faad)  \
 	$(check_voaacenc) \

tests/check/elements/.gitignore

@@ -17,6 +17,7 @@ curlhttpsink
 curlsmtpsink
 dash_demux
 dash_mpd
+dtls
 faac
 faad
 gdpdepay

tests/check/elements/dtls.c

@@ -0,0 +1,192 @@
+/* GStreamer unit tests for the srtp elements
+ * Copyright (C) 2007 Tim-Philipp Müller <tim centricular net>
+ * Copyright (C) 2008 Sebastian Dröge <slomo@circular-chaos.org>
+ * Copyright (C) 2016 Collabora Ltd <vincent.penquerch@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifdef HAVE_VALGRIND
+# include <valgrind/valgrind.h>
+#endif
+
+#include <gst/check/gstcheck.h>
+
+#include <gst/check/gstharness.h>
+
+GST_START_TEST (test_create_and_unref)
+{
+  GstElement *e;
+
+  e = gst_element_factory_make ("dtlsenc", NULL);
+  fail_unless (e != NULL);
+  gst_element_set_state (e, GST_STATE_NULL);
+  gst_object_unref (e);
+
+  e = gst_element_factory_make ("dtlsdec", NULL);
+  fail_unless (e != NULL);
+  gst_element_set_state (e, GST_STATE_NULL);
+  gst_object_unref (e);
+}
+
+GST_END_TEST;
+
+static GMutex key_lock;
+static GCond key_cond;
+static int key_count;
+
+static void
+_on_key_received (GstElement * element, gpointer user_data)
+{
+  g_mutex_lock (&key_lock);
+  key_count++;
+  g_cond_broadcast (&key_cond);
+  g_mutex_unlock (&key_lock);
+}
+
+static void
+_wait_for_key_count_to_reach (int n)
+{
+  g_mutex_lock (&key_lock);
+  while (key_count < n)
+    g_cond_wait (&key_cond, &key_lock);
+  g_mutex_unlock (&key_lock);
+}
+
+static gchar data[] = {
+  0x00, 0x01, 0x02, 0x03,
+};
+
+GST_START_TEST (test_data_transfer)
+{
+  GstHarness *server, *client;
+  GstElement *s_enc, *s_dec, *c_enc, *c_dec, *s_bin, *c_bin;
+  GstPad *target, *ghost;
+  GstBuffer *buffer, *buf2;
+
+  /* setup a server and client for dtls negotiation */
+  s_bin = gst_bin_new (NULL);
+  c_bin = gst_bin_new (NULL);
+
+  /* XXX: the element set states are needed to avoid a runtime warning:
+   *
+   *   'gst_dtls_connection_process: runtime check failed: (!priv->bio_buffer)'
+   *
+   * where the encoder needs to be started (and SSL initialized) before the
+   * associated decoder receives any data and calls gst_dtls_connection_process().
+   */
+  s_dec = gst_element_factory_make ("dtlsdec", "server_dec");
+  g_object_set (s_dec, "connection-id", "server", NULL);
+  g_signal_connect (s_dec, "on-key-received", G_CALLBACK (_on_key_received),
+      NULL);
+  gst_element_set_state (s_dec, GST_STATE_PAUSED);
+  gst_bin_add (GST_BIN (s_bin), s_dec);
+
+  s_enc = gst_element_factory_make ("dtlsenc", "server_enc");
+  g_object_set (s_enc, "connection-id", "server", NULL);
+  g_signal_connect (s_enc, "on-key-received", G_CALLBACK (_on_key_received),
+      NULL);
+  gst_element_set_state (s_enc, GST_STATE_PAUSED);
+  gst_bin_add (GST_BIN (c_bin), s_enc);
+
+  c_dec = gst_element_factory_make ("dtlsdec", "client_dec");
+  g_object_set (c_dec, "connection-id", "client", NULL);
+  g_signal_connect (c_dec, "on-key-received", G_CALLBACK (_on_key_received),
+      NULL);
+  gst_element_set_state (c_dec, GST_STATE_PAUSED);
+  gst_bin_add (GST_BIN (c_bin), c_dec);
+
+  c_enc = gst_element_factory_make ("dtlsenc", "client_enc");
+  g_object_set (c_enc, "connection-id", "client", "is-client", TRUE, NULL);
+  g_signal_connect (c_enc, "on-key-received", G_CALLBACK (_on_key_received),
+      NULL);
+  gst_element_set_state (c_enc, GST_STATE_PAUSED);
+  gst_bin_add (GST_BIN (s_bin), c_enc);
+
+  gst_element_link_pads (s_enc, "src", c_dec, "sink");
+  gst_element_link_pads (c_enc, "src", s_dec, "sink");
+
+  target = gst_element_get_request_pad (c_dec, "src");
+  ghost = gst_ghost_pad_new ("src", target);
+  gst_element_add_pad (s_bin, ghost);
+  gst_object_unref (target);
+
+  target = gst_element_get_request_pad (s_enc, "sink");
+  ghost = gst_ghost_pad_new ("sink", target);
+  gst_element_add_pad (s_bin, ghost);
+  gst_object_unref (target);
+
+  target = gst_element_get_request_pad (s_dec, "src");
+  ghost = gst_ghost_pad_new ("src", target);
+  gst_element_add_pad (c_bin, ghost);
+  gst_object_unref (target);
+
+  target = gst_element_get_request_pad (c_enc, "sink");
+  ghost = gst_ghost_pad_new ("sink", target);
+  gst_element_add_pad (c_bin, ghost);
+  gst_object_unref (target);
+
+  server = gst_harness_new_with_element (s_bin, "sink", "src");
+  client = gst_harness_new_with_element (c_bin, "sink", "src");
+
+  gst_harness_set_src_caps_str (server, "application/data");
+  gst_harness_set_src_caps_str (client, "application/data");
+
+  _wait_for_key_count_to_reach (4);
+
+  buffer = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY, data,
+      G_N_ELEMENTS (data), 0, G_N_ELEMENTS (data), NULL, NULL);
+  gst_harness_push (server, gst_buffer_ref (buffer));
+  buf2 = gst_harness_pull (server);
+  fail_unless_equals_int (0, gst_buffer_memcmp (buf2, 0, data,
+          G_N_ELEMENTS (data)));
+  gst_buffer_unref (buf2);
+
+  gst_harness_play (client);
+  gst_harness_push (client, gst_buffer_ref (buffer));
+  buf2 = gst_harness_pull (client);
+  fail_unless_equals_int (0, gst_buffer_memcmp (buf2, 0, data,
+          G_N_ELEMENTS (data)));
+  gst_buffer_unref (buf2);
+
+  gst_object_unref (s_bin);
+  gst_object_unref (c_bin);
+
+  gst_buffer_unref (buffer);
+  gst_harness_teardown (server);
+  gst_harness_teardown (client);
+}
+
+GST_END_TEST;
+
+static Suite *
+dtls_suite (void)
+{
+  Suite *s = suite_create ("dtls");
+  TCase *tc_chain = tcase_create ("general");
+
+  suite_add_tcase (s, tc_chain);
+  tcase_add_test (tc_chain, test_create_and_unref);
+  tcase_add_test (tc_chain, test_data_transfer);
+
+  return s;
+}
+
+GST_CHECK_MAIN (dtls);