Merge in the bridge_construction branch to make the system use the Bridging API.

Breaks many things until they can be reworked.  A partial list:
chan_agent
chan_dahdi, chan_misdn, chan_iax2 native bridging
app_queue
COLP updates
DTMF attended transfers
Protocol attended transfers


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@389378 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 191 insertions, 0 deletions

diff --git a/main/parking.c b/main/parking.c
new file mode 100644
index 000000000..2a5b72e61
--- /dev/null
+++ b/main/parking.c
@@ -0,0 +1,191 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2013, Digium, Inc.
+ *
+ * Jonathan Rose <jrose@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief Parking Core
+ *
+ * \author Jonathan Rose <jrose@digium.com>
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "asterisk/_private.h"
+#include "asterisk/astobj2.h"
+#include "asterisk/pbx.h"
+#include "asterisk/bridging.h"
+#include "asterisk/parking.h"
+#include "asterisk/channel.h"
+
+/*! \brief Message type for parked calls */
+static struct stasis_message_type *parked_call_type;
+
+/*! \brief Topic for parking lots */
+static struct stasis_topic *parking_topic;
+
+/*! \brief Function Callback for handling blind transfers to park applications */
+static ast_park_blind_xfer_fn ast_park_blind_xfer_func = NULL;
+
+/*! \brief Function Callback for handling a bridge channel trying to park itself */
+static ast_bridge_channel_park_fn ast_bridge_channel_park_func = NULL;
+
+void ast_parking_stasis_init(void)
+{
+	parked_call_type = stasis_message_type_create("ast_parked_call");
+	parking_topic = stasis_topic_create("ast_parking");
+}
+
+void ast_parking_stasis_disable(void)
+{
+	ao2_cleanup(parked_call_type);
+	ao2_cleanup(parking_topic);
+	parked_call_type = NULL;
+	parking_topic = NULL;
+}
+
+struct stasis_topic *ast_parking_topic(void)
+{
+	return parking_topic;
+}
+
+struct stasis_message_type *ast_parked_call_type(void)
+{
+	return parked_call_type;
+}
+
+/*! \brief Destructor for parked_call_payload objects */
+static void parked_call_payload_destructor(void *obj)
+{
+	struct ast_parked_call_payload *park_obj = obj;
+
+	ao2_cleanup(park_obj->parkee);
+	ao2_cleanup(park_obj->parker);
+	ast_string_field_free_memory(park_obj);
+}
+
+struct ast_parked_call_payload *ast_parked_call_payload_create(enum ast_parked_call_event_type event_type,
+		struct ast_channel_snapshot *parkee_snapshot, struct ast_channel_snapshot *parker_snapshot,
+		struct ast_channel_snapshot *retriever_snapshot, const char *parkinglot,
+		unsigned int parkingspace, unsigned long int timeout,
+		unsigned long int duration)
+{
+	RAII_VAR(struct ast_parked_call_payload *, payload, NULL, ao2_cleanup);
+
+	payload = ao2_alloc(sizeof(*payload), parked_call_payload_destructor);
+	if (!payload) {
+		return NULL;
+	}
+
+	if (ast_string_field_init(payload, 32)) {
+		return NULL;
+	}
+
+	payload->event_type = event_type;
+
+	ao2_ref(parkee_snapshot, +1);
+	payload->parkee = parkee_snapshot;
+
+	if (parker_snapshot) {
+		ao2_ref(parker_snapshot, +1);
+		payload->parker = parker_snapshot;
+	}
+
+	if (retriever_snapshot) {
+		ao2_ref(retriever_snapshot, +1);
+		payload->retriever = retriever_snapshot;
+	}
+
+	if (parkinglot) {
+		ast_string_field_set(payload, parkinglot, parkinglot);
+	}
+
+	payload->parkingspace = parkingspace;
+	payload->timeout = timeout;
+	payload->duration = duration;
+
+	/* Bump the ref count by one since RAII_VAR is going to eat one when we leave. */
+	ao2_ref(payload, +1);
+	return payload;
+}
+
+void ast_install_park_blind_xfer_func(ast_park_blind_xfer_fn park_blind_xfer_func)
+{
+	ast_park_blind_xfer_func = park_blind_xfer_func;
+}
+
+void ast_install_bridge_channel_park_func(ast_bridge_channel_park_fn bridge_channel_park_func)
+{
+	ast_bridge_channel_park_func = bridge_channel_park_func;
+}
+
+void ast_uninstall_park_blind_xfer_func(void)
+{
+	ast_park_blind_xfer_func = NULL;
+}
+
+void ast_uninstall_bridge_channel_park_func(void)
+{
+	ast_bridge_channel_park_func = NULL;
+}
+
+int ast_park_blind_xfer(struct ast_bridge *bridge, struct ast_bridge_channel *parker,
+		struct ast_exten *park_exten)
+{
+	static int warned = 0;
+	if (ast_park_blind_xfer_func) {
+		return ast_park_blind_xfer_func(bridge, parker, park_exten);
+	}
+
+	if (warned++ % 10 == 0) {
+		ast_verb(3, "%s attempted to blind transfer to a parking extension, but no parking blind transfer function is loaded.\n",
+			ast_channel_name(parker->chan));
+	}
+
+	return -1;
+}
+
+struct ast_exten *ast_get_parking_exten(const char *exten_str, struct ast_channel *chan, const char *context)
+{
+	struct ast_exten *exten;
+	struct pbx_find_info q = { .stacklen = 0 }; /* the rest is reset in pbx_find_extension */
+	const char *app_at_exten;
+
+	ast_debug(4, "Checking if %s@%s is a parking exten\n", exten_str, context);
+	exten = pbx_find_extension(chan, NULL, &q, context, exten_str, 1, NULL, NULL,
+		E_MATCH);
+	if (!exten) {
+		return NULL;
+	}
+
+	app_at_exten = ast_get_extension_app(exten);
+	if (!app_at_exten || strcasecmp(PARK_APPLICATION, app_at_exten)) {
+		return NULL;
+	}
+
+	return exten;
+}
+
+void ast_bridge_channel_park(struct ast_bridge_channel *bridge_channel, const char *parkee_uuid, const char *parker_uuid, const char *app_data)
+{
+	/* Run installable function */
+	if (ast_bridge_channel_park_func) {
+		return ast_bridge_channel_park_func(bridge_channel, parkee_uuid, parker_uuid, app_data);
+	}
+}