sip: Add media manager and sipify origin

* pipeline: we should bind the used socket of our udpsink to the socket udpsrc

plugins/sip/calls-sip-util.c

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2021 Purism SPC
+ *
+ * This file is part of Calls.
+ *
+ * Calls is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Calls 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Calls.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: Evangelos Ribeiro Tzaras <evangelos.tzaras@puri.sm>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ */
+
+#include "calls-sip-util.h"
+
+gboolean
+check_sips (const gchar *addr)
+{
+  /* To keep it simple we only check if the URL starts with "sips:" */
+  return g_str_has_prefix (addr, "sips:");
+}
+
+
+const gchar *
+get_protocol_prefix (const gchar *protocol)
+{
+  if (g_strcmp0 (protocol, "UDP") == 0 ||
+      g_strcmp0 (protocol, "TCP") == 0)
+    return "sip";
+
+  if (g_strcmp0 (protocol, "TLS") == 0)
+    return "sips";
+
+  return NULL;
+}
+
+
+gboolean
+protocol_is_valid (const gchar *protocol)
+{
+  return g_strcmp0 (protocol, "UDP") == 0 ||
+    g_strcmp0 (protocol, "TCP") == 0 ||
+    g_strcmp0 (protocol, "TLS") == 0;
+}