location-reporting: add atom implementation

1 files changed, 393 insertions, 0 deletions

diff --git a/src/location-reporting.c b/src/location-reporting.c
new file mode 100644
index 00000000..6ab09147
--- /dev/null
+++ b/src/location-reporting.c
@@ -0,0 +1,393 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2010  Nokia Corporation and/or its subsidiary(-ies).
+ *  Copyright (C) 2010  Intel Corporation. All rights reserved.
+ *  Copyright (C) 2011  ProFUSION embedded systems.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  This program 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 this program; 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
+
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include <glib.h>
+#include <gdbus.h>
+
+#include "ofono.h"
+#include "common.h"
+
+#ifndef DBUS_TYPE_UNIX_FD
+#define DBUS_TYPE_UNIX_FD -1
+#endif
+
+static GSList *g_drivers = NULL;
+
+struct ofono_location_reporting {
+	DBusMessage *pending;
+	const struct ofono_location_reporting_driver *driver;
+	void *driver_data;
+	struct ofono_atom *atom;
+	ofono_bool_t enabled;
+	char *client_owner;
+	guint disconnect_watch;
+};
+
+static const char *location_reporting_type_to_string(
+					enum ofono_location_reporting_type type)
+{
+	switch (type) {
+	case OFONO_LOCATION_REPORTING_TYPE_NMEA:
+		return "nmea";
+	};
+
+	return NULL;
+}
+
+static DBusMessage *location_reporting_get_properties(DBusConnection *conn,
+						DBusMessage *msg, void *data)
+
+{
+	struct ofono_location_reporting *lr = data;
+	DBusMessage *reply;
+	DBusMessageIter iter;
+	DBusMessageIter dict;
+	const char *type;
+	int value;
+
+	reply = dbus_message_new_method_return(msg);
+	if (reply == NULL)
+		return NULL;
+
+	dbus_message_iter_init_append(reply, &iter);
+	dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
+					OFONO_PROPERTIES_ARRAY_SIGNATURE,
+					&dict);
+
+	value = lr->enabled;
+	ofono_dbus_dict_append(&dict, "Enabled", DBUS_TYPE_BOOLEAN, &value);
+
+	type = location_reporting_type_to_string(lr->driver->type);
+	ofono_dbus_dict_append(&dict, "Type", DBUS_TYPE_STRING, &type);
+
+	dbus_message_iter_close_container(&iter, &dict);
+
+	return reply;
+}
+
+static void client_remove(struct ofono_location_reporting *lr)
+{
+	DBusConnection *conn = ofono_dbus_get_connection();
+
+	if (lr->disconnect_watch) {
+		g_dbus_remove_watch(conn, lr->disconnect_watch);
+		lr->disconnect_watch = 0;
+	}
+
+	g_free(lr->client_owner);
+}
+
+static void signal_enabled(const struct ofono_location_reporting *lr)
+{
+	DBusConnection *conn = ofono_dbus_get_connection();
+	const char *path = __ofono_atom_get_path(lr->atom);
+	int value = lr->enabled;
+
+	ofono_dbus_signal_property_changed(conn, path,
+					OFONO_LOCATION_REPORTING_INTERFACE,
+					"Enabled", DBUS_TYPE_BOOLEAN, &value);
+}
+
+static void client_exited_disable_cb(const struct ofono_error *error,
+								void *data)
+{
+	struct ofono_location_reporting *lr = data;
+
+	if (error->type != OFONO_ERROR_TYPE_NO_ERROR) {
+		ofono_error("Disabling location-reporting failed");
+
+		return;
+	}
+
+	client_remove(lr);
+	lr->enabled = FALSE;
+
+	signal_enabled(lr);
+}
+
+static void client_exited(DBusConnection *conn, void *data)
+{
+	struct ofono_location_reporting *lr = data;
+
+	lr->disconnect_watch = 0;
+
+	lr->driver->disable(lr, client_exited_disable_cb , lr);
+}
+
+static void location_reporting_disable_cb(const struct ofono_error *error,
+								void *data)
+{
+	struct ofono_location_reporting *lr = data;
+	DBusMessage *reply;
+
+	if (error->type != OFONO_ERROR_TYPE_NO_ERROR) {
+		ofono_error("Disabling location-reporting failed");
+
+		reply = __ofono_error_failed(lr->pending);
+		__ofono_dbus_pending_reply(&lr->pending, reply);
+
+		return;
+	}
+
+	client_remove(lr);
+	lr->enabled = FALSE;
+
+	reply = dbus_message_new_method_return(lr->pending);
+	__ofono_dbus_pending_reply(&lr->pending, reply);
+
+	signal_enabled(lr);
+}
+
+static void location_reporting_enable_cb(const struct ofono_error *error,
+							int fd,	void *data)
+{
+	struct ofono_location_reporting *lr = data;
+	DBusMessage *reply;
+
+	if (error->type != OFONO_ERROR_TYPE_NO_ERROR) {
+		ofono_error("Enabling location-reporting failed");
+
+		client_remove(lr);
+
+		reply = __ofono_error_failed(lr->pending);
+		__ofono_dbus_pending_reply(&lr->pending, reply);
+
+		return;
+	}
+
+	lr->enabled = TRUE;
+
+	reply = dbus_message_new_method_return(lr->pending);
+	dbus_message_append_args(reply, DBUS_TYPE_UNIX_FD, &fd,
+							DBUS_TYPE_INVALID);
+
+	__ofono_dbus_pending_reply(&lr->pending, reply);
+
+	signal_enabled(lr);
+}
+
+static DBusMessage *location_reporting_request(DBusConnection *conn,
+						DBusMessage *msg, void *data)
+{
+	struct ofono_location_reporting *lr = data;
+	const char *caller = dbus_message_get_sender(msg);
+
+	if (lr->pending != NULL)
+		return __ofono_error_busy(msg);
+
+	if (lr->enabled)
+		return __ofono_error_in_use(msg);
+
+	lr->client_owner = g_strdup(caller);
+	lr->disconnect_watch = g_dbus_add_disconnect_watch(conn,
+				lr->client_owner, client_exited, lr, NULL);
+	lr->pending = dbus_message_ref(msg);
+
+	lr->driver->enable(lr, location_reporting_enable_cb, lr);
+
+	return NULL;
+}
+
+static DBusMessage *location_reporting_release(DBusConnection *conn,
+						DBusMessage *msg, void *data)
+{
+	struct ofono_location_reporting *lr = data;
+	const char *caller = dbus_message_get_sender(msg);
+
+
+	/*
+	 * Avoid a race by not trying to release the device if there is a
+	 * pending message or client already signaled it's exiting. In the
+	 * later case, the device will eventually be released in
+	 * client_exited_disable_cb().
+	 */
+	if (lr->pending != NULL || (lr->enabled && !lr->disconnect_watch))
+		return __ofono_error_busy(msg);
+
+	if (lr->enabled == FALSE)
+		return __ofono_error_not_available(msg);
+
+	if (g_strcmp0(caller, lr->client_owner))
+		return __ofono_error_access_denied(msg);
+
+	lr->pending = dbus_message_ref(msg);
+
+	lr->driver->disable(lr, location_reporting_disable_cb, lr);
+
+	return NULL;
+}
+
+static GDBusMethodTable location_reporting_methods[] = {
+	{ "GetProperties",  "",    "a{sv}", location_reporting_get_properties },
+	{ "Request",        "",    "h",     location_reporting_request,
+						G_DBUS_METHOD_FLAG_ASYNC },
+	{ "Release",        "",    "",      location_reporting_release,
+						G_DBUS_METHOD_FLAG_ASYNC },
+	{ }
+};
+
+static GDBusSignalTable location_reporting_signals[] = {
+	{ "PropertyChanged",	"sv" },
+	{ }
+};
+
+int ofono_location_reporting_driver_register(
+				const struct ofono_location_reporting_driver *d)
+{
+	DBG("driver: %p, name: %s", d, d->name);
+
+	if (d == NULL || d->probe == NULL)
+		return -EINVAL;
+
+	g_drivers = g_slist_prepend(g_drivers, (void *) d);
+
+	return 0;
+}
+
+void ofono_location_reporting_driver_unregister(
+				const struct ofono_location_reporting_driver *d)
+{
+	DBG("driver: %p, name: %s", d, d->name);
+
+	if (d == NULL)
+		return;
+
+	g_drivers = g_slist_remove(g_drivers, (void *) d);
+}
+
+struct ofono_modem *ofono_location_reporting_get_modem(
+					struct ofono_location_reporting *lr)
+{
+	return __ofono_atom_get_modem(lr->atom);
+}
+
+static void location_reporting_unregister(struct ofono_atom *atom)
+{
+	struct ofono_location_reporting *lr = __ofono_atom_get_data(atom);
+	const char *path = __ofono_atom_get_path(lr->atom);
+	DBusConnection *conn = ofono_dbus_get_connection();
+	struct ofono_modem *modem = __ofono_atom_get_modem(lr->atom);
+
+	ofono_modem_remove_interface(modem, OFONO_LOCATION_REPORTING_INTERFACE);
+	g_dbus_unregister_interface(conn, path,
+					OFONO_LOCATION_REPORTING_INTERFACE);
+}
+
+static void location_reporting_remove(struct ofono_atom *atom)
+{
+	struct ofono_location_reporting *lr = __ofono_atom_get_data(atom);
+
+	DBG("atom: %p", atom);
+
+	if (lr == NULL)
+		return;
+
+	if (lr->driver && lr->driver->remove)
+		lr->driver->remove(lr);
+
+	g_free(lr);
+}
+
+struct ofono_location_reporting *ofono_location_reporting_create(
+						struct ofono_modem *modem,
+						unsigned int vendor,
+						const char *driver, void *data)
+{
+	struct ofono_location_reporting *lr;
+	GSList *l;
+
+	if (driver == NULL)
+		return NULL;
+
+	/* Only D-Bus >= 1.3 supports fd-passing */
+	if (DBUS_TYPE_UNIX_FD == -1)
+		return NULL;
+
+	lr = g_try_new0(struct ofono_location_reporting, 1);
+	if (lr == NULL)
+		return NULL;
+
+	lr->atom = __ofono_modem_add_atom(modem,
+					OFONO_ATOM_TYPE_LOCATION_REPORTING,
+					location_reporting_remove, lr);
+
+	for (l = g_drivers; l; l = l->next) {
+		const struct ofono_location_reporting_driver *drv = l->data;
+
+		if (g_strcmp0(drv->name, driver) != 0)
+			continue;
+
+		if (drv->probe(lr, vendor, data) < 0)
+			continue;
+
+		lr->driver = drv;
+		break;
+	}
+
+	return lr;
+}
+
+void ofono_location_reporting_register(struct ofono_location_reporting *lr)
+{
+	DBusConnection *conn = ofono_dbus_get_connection();
+	struct ofono_modem *modem = __ofono_atom_get_modem(lr->atom);
+	const char *path = __ofono_atom_get_path(lr->atom);
+
+	if (!g_dbus_register_interface(conn, path,
+					OFONO_LOCATION_REPORTING_INTERFACE,
+					location_reporting_methods,
+					location_reporting_signals,
+					NULL, lr, NULL)) {
+		ofono_error("Could not create %s interface",
+					OFONO_LOCATION_REPORTING_INTERFACE);
+
+		return;
+	}
+
+	ofono_modem_add_interface(modem, OFONO_LOCATION_REPORTING_INTERFACE);
+	__ofono_atom_register(lr->atom, location_reporting_unregister);
+}
+
+void ofono_location_reporting_remove(struct ofono_location_reporting *lr)
+{
+	__ofono_atom_free(lr->atom);
+}
+
+void ofono_location_reporting_set_data(struct ofono_location_reporting *lr,
+								void *data)
+{
+	lr->driver_data = data;
+}
+
+void *ofono_location_reporting_get_data(struct ofono_location_reporting *lr)
+{
+	return lr->driver_data;
+}