Added implementation for RegisterAgent and UnregisterAgent in
NetworkMonitor interface and added netmonagent source file for agent
implemention.
---
 Makefile.am       |   3 +-
 src/netmon.c      | 126 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
 src/netmonagent.c | 122 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/netmonagent.h |  23 ++++++++++
 src/ofono.conf    |   1 +
 5 files changed, 270 insertions(+), 5 deletions(-)
 create mode 100644 src/netmonagent.c
 create mode 100644 src/netmonagent.h

diff --git a/Makefile.am b/Makefile.am
index 658e152..fbc4d6d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -626,7 +626,8 @@ src_ofonod_SOURCES = $(builtin_sources) $(gatchat_sources) 
src/ofono.ver \
                        src/cdma-provision.c src/handsfree.c \
                        src/handsfree-audio.c src/bluetooth.h \
                        src/hfp.h src/siri.c \
-                       src/netmon.c src/lte.c
+                       src/netmon.c src/lte.c \
+                       src/netmonagent.c src/netmonagent.h
 
 src_ofonod_LDADD = gdbus/libgdbus-internal.la $(builtin_libadd) \
                        @GLIB_LIBS@ @DBUS_LIBS@ -ldl
diff --git a/src/netmon.c b/src/netmon.c
index 6476783..3a49587 100644
--- a/src/netmon.c
+++ b/src/netmon.c
@@ -34,6 +34,7 @@
 #include <gdbus.h>
 
 #include "ofono.h"
+#include "netmonagent.h"
 
 #define CELL_INFO_DICT_APPEND(p_dict, key, info, type, dbus_type)      do { \
        type value; \
@@ -51,6 +52,7 @@ struct ofono_netmon {
        DBusMessage *reply;
        void *driver_data;
        struct ofono_atom *atom;
+       struct netmon_agent *agent;
 };
 
 static const char *cell_type_to_tech_name(enum ofono_netmon_cell_type type)
@@ -72,6 +74,7 @@ void ofono_netmon_serving_cell_notify(struct ofono_netmon 
*netmon,
                                        int info_type, ...)
 {
        va_list arglist;
+       DBusMessage *agent_notify = NULL;
        DBusMessageIter iter;
        DBusMessageIter dict;
        enum ofono_netmon_info next_info_type = info_type;
@@ -79,12 +82,17 @@ void ofono_netmon_serving_cell_notify(struct ofono_netmon 
*netmon,
        char *mcc;
        char *mnc;
        int intval;
-       netmon->reply = dbus_message_new_method_return(netmon->pending);
 
-       if (netmon->reply == NULL)
-               return;
+       if (netmon->pending != NULL) {
+               netmon->reply = dbus_message_new_method_return(netmon->pending);
+               dbus_message_iter_init_append(netmon->reply, &iter);
+       } else if (netmon->agent != NULL) {
+               agent_notify = netmon_agent_new_method_call(netmon->agent,
+                                       "ServingCellInformationChanged");
 
-       dbus_message_iter_init_append(netmon->reply, &iter);
+               dbus_message_iter_init_append(agent_notify, &iter);
+       } else
+               return;
 
        dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
                                        OFONO_PROPERTIES_ARRAY_SIGNATURE,
@@ -243,6 +251,9 @@ done:
        va_end(arglist);
 
        dbus_message_iter_close_container(&iter, &dict);
+
+       if (agent_notify)
+               netmon_agent_send_no_reply(netmon->agent, agent_notify);
 }
 
 static void serving_cell_info_callback(const struct ofono_error *error,
@@ -291,10 +302,117 @@ static DBusMessage 
*netmon_get_serving_cell_info(DBusConnection *conn,
        return NULL;
 }
 
+static void periodic_updates_enabled_cb(const struct ofono_error *error,
+                                       void *data)
+{
+       struct ofono_netmon *netmon = data;
+
+       if (error->type != OFONO_ERROR_TYPE_NO_ERROR) {
+               ofono_error("Error enabling periodic updates");
+
+               netmon_agent_free(netmon->agent);
+               return;
+       }
+}
+
+static void periodic_updates_disabled_cb(const struct ofono_error *error,
+                                       void *data)
+{
+       if (error->type != OFONO_ERROR_TYPE_NO_ERROR)
+               ofono_error("Error disabling periodic updates");
+}
+
+static void agent_removed_cb(gpointer user_data)
+{
+       struct ofono_netmon *netmon = user_data;
+
+       netmon->agent = NULL;
+
+       netmon->driver->enable_periodic_update(netmon, 0, 0,
+                                               periodic_updates_disabled_cb,
+                                               NULL);
+}
+
+static DBusMessage *netmon_register_agent(DBusConnection *conn,
+                               DBusMessage *msg, void *data)
+{
+       struct ofono_netmon *netmon = data;
+       const char *agent_path;
+       const unsigned int enable = 1;
+       unsigned int period;
+
+       if (netmon->agent)
+               return __ofono_error_busy(msg);
+
+       if (!netmon->driver->enable_periodic_update)
+               return __ofono_error_not_implemented(msg);
+
+       if (dbus_message_get_args(msg, NULL,
+                               DBUS_TYPE_OBJECT_PATH, &agent_path,
+                               DBUS_TYPE_UINT32, &period,
+                               DBUS_TYPE_INVALID) == FALSE)
+               return __ofono_error_invalid_args(msg);
+
+       if (!__ofono_dbus_valid_object_path(agent_path))
+               return __ofono_error_invalid_format(msg);
+
+       if (!period)
+               return __ofono_error_invalid_args(msg);
+
+       /* minimum period is 5 seconds, to avoid frequent updates*/
+       if (period < 5)
+               period = 5;
+
+       netmon->agent = netmon_agent_new(agent_path,
+                                       dbus_message_get_sender(msg));
+
+       if (netmon->agent == NULL)
+               return __ofono_error_failed(msg);
+
+       netmon_agent_set_removed_notify(netmon->agent, agent_removed_cb, 
netmon);
+
+       netmon->driver->enable_periodic_update(netmon, enable, period,
+                                       periodic_updates_enabled_cb, netmon);
+
+       return dbus_message_new_method_return(msg);
+}
+
+static DBusMessage *netmon_unregister_agent(DBusConnection *conn,
+                                       DBusMessage *msg, void *data)
+{
+       struct ofono_netmon *netmon = data;
+       const char *agent_path;
+       const char *agent_bus = dbus_message_get_sender(msg);
+
+       if (!netmon->driver->enable_periodic_update)
+               return __ofono_error_not_implemented(msg);
+
+       if (dbus_message_get_args(msg, NULL,
+                                       DBUS_TYPE_OBJECT_PATH, &agent_path,
+                                       DBUS_TYPE_INVALID) == FALSE)
+               return __ofono_error_invalid_args(msg);
+
+       if (netmon->agent == NULL)
+               return __ofono_error_failed(msg);
+
+       if (!netmon_agent_matches(netmon->agent, agent_path, agent_bus))
+               return __ofono_error_access_denied(msg);
+
+       netmon_agent_free(netmon->agent);
+
+       return dbus_message_new_method_return(msg);
+}
+
 static const GDBusMethodTable netmon_methods[] = {
        { GDBUS_ASYNC_METHOD("GetServingCellInformation",
                        NULL, GDBUS_ARGS({ "cellinfo", "a{sv}" }),
                        netmon_get_serving_cell_info) },
+       { GDBUS_METHOD("RegisterAgent",
+                       GDBUS_ARGS({ "path", "o"}, { "period", "u"}), NULL,
+                       netmon_register_agent) },
+       { GDBUS_METHOD("UnregisterAgent",
+                       GDBUS_ARGS({ "agent", "o" }), NULL,
+                       netmon_unregister_agent) },
        { }
 };
 
diff --git a/src/netmonagent.c b/src/netmonagent.c
new file mode 100644
index 0000000..ab6f050
--- /dev/null
+++ b/src/netmonagent.c
@@ -0,0 +1,122 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#define _GNU_SOURCE
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+
+#include <glib.h>
+#include <gdbus.h>
+
+#include "ofono.h"
+#include "netmonagent.h"
+
+struct netmon_agent {
+       char *path;
+       char *bus;
+       guint disconnect_watch;
+       ofono_destroy_func removed_cb;
+       void *removed_data;
+};
+
+DBusMessage *netmon_agent_new_method_call(struct netmon_agent *agent,
+                               const char *method)
+{
+       DBusMessage *msg = dbus_message_new_method_call(agent->bus,
+                                       agent->path,
+                                       OFONO_NETMON_AGENT_INTERFACE,
+                                       method);
+
+       return msg;
+}
+
+void netmon_agent_send_no_reply(struct netmon_agent *agent,
+                               DBusMessage *message)
+{
+       DBusConnection *conn = ofono_dbus_get_connection();
+
+       dbus_message_set_no_reply(message, TRUE);
+
+       g_dbus_send_message(conn, message);
+}
+
+static inline void netmon_agent_send_release(struct netmon_agent *agent)
+{
+       DBusMessage *msg = netmon_agent_new_method_call(agent, "Release");
+
+       netmon_agent_send_no_reply(agent, msg);
+}
+
+ofono_bool_t netmon_agent_matches(struct netmon_agent *agent,
+                               const char *path, const char *sender)
+{
+       return g_str_equal(agent->path, path) &&
+                       g_str_equal(agent->bus, sender);
+}
+
+ofono_bool_t netmon_agent_sender_matches(struct netmon_agent *agent,
+                                       const char *sender)
+{
+       return g_str_equal(agent->bus, sender);
+}
+
+void netmon_agent_set_removed_notify(struct netmon_agent *agent,
+                                       ofono_destroy_func destroy,
+                                       void *user_data)
+{
+       agent->removed_cb = destroy;
+       agent->removed_data = user_data;
+}
+
+void netmon_agent_free(struct netmon_agent *agent)
+{
+       DBusConnection *conn = ofono_dbus_get_connection();
+
+       if (agent == NULL)
+               return;
+
+       if (agent->disconnect_watch) {
+               netmon_agent_send_release(agent);
+               g_dbus_remove_watch(conn, agent->disconnect_watch);
+               agent->disconnect_watch = 0;
+       }
+
+       if (agent->removed_cb)
+               agent->removed_cb(agent->removed_data);
+
+       g_free(agent->path);
+       g_free(agent->bus);
+       g_free(agent);
+}
+
+static void netmon_agent_disconnect_cb(DBusConnection *conn, void *user_data)
+{
+       struct netmon_agent *agent = user_data;
+
+       ofono_debug("Agent excited without calling UnregisterAgent");
+
+       agent->disconnect_watch = 0;
+
+       netmon_agent_free(agent);
+}
+
+struct netmon_agent *netmon_agent_new(const char *path,
+                                               const char *sender)
+{
+       struct netmon_agent *agent = g_try_new0(struct netmon_agent, 1);
+       DBusConnection *conn = ofono_dbus_get_connection();
+
+       if (agent == NULL)
+               return NULL;
+
+       agent->bus = g_strdup(sender);
+       agent->path = g_strdup(path);
+
+       agent->disconnect_watch = g_dbus_add_disconnect_watch(conn, sender,
+                                               netmon_agent_disconnect_cb,
+                                               agent, NULL);
+
+       return agent;
+}
diff --git a/src/netmonagent.h b/src/netmonagent.h
new file mode 100644
index 0000000..f64a503
--- /dev/null
+++ b/src/netmonagent.h
@@ -0,0 +1,23 @@
+struct netmon_agent;
+
+struct netmon_agent *netmon_agent_new(const char *path, const char *sender);
+
+void netmon_agent_free(struct netmon_agent *agent);
+
+void netmon_agent_set_removed_notify(struct netmon_agent *agent,
+                                       ofono_destroy_func removed_cb,
+                                       void *user_data);
+
+ofono_bool_t netmon_agent_matches(struct netmon_agent *agent,
+                               const char *path, const char *sender);
+
+ofono_bool_t netmon_agent_sender_matches(struct netmon_agent *agent,
+                                       const char *sender);
+
+DBusMessage *netmon_agent_new_method_call(struct netmon_agent *netmon,
+                                       const char *method);
+
+void netmon_agent_send_no_reply(struct netmon_agent *agent,
+                               DBusMessage *message);
+
+void netmon_agent_test(struct netmon_agent *agent);
diff --git a/src/ofono.conf b/src/ofono.conf
index ed56d3b..61e0bde 100644
--- a/src/ofono.conf
+++ b/src/ofono.conf
@@ -15,6 +15,7 @@
     <allow send_interface="org.ofono.SmartMessagingAgent"/>
     <allow send_interface="org.ofono.PositioningRequestAgent"/>
     <allow send_interface="org.ofono.HandsfreeAudioAgent"/>
+    <allow send_interface="org.ofono.NetworkMonitorAgent"/>
   </policy>
 
   <policy at_console="true">
-- 
1.9.1

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