Add sender verification of D-Bus signals.

dbus/object_proxy.h

Index: dbus/object_proxy.h
diff --git a/dbus/object_proxy.h b/dbus/object_proxy.h
index 9642262be56e909cf099211108e6bae54cc3f09c..57ad660c43312de56c7749c70cc26be0a875dc7e 100644
--- a/dbus/object_proxy.h
+++ b/dbus/object_proxy.h
@@ -214,6 +214,10 @@ class ObjectProxy : public base::RefCountedThreadSafe<ObjectProxy> {
   DBusHandlerResult HandleMessage(DBusConnection* connection,
                                   DBusMessage* raw_message);
 
+  // Verifies the sender, checks if we know about the signal, and invokes the
+  // callback if any.
+  DBusHandlerResult VerifySenderAndDispatch(scoped_ptr<dbus::Signal> signal);
+
   // Runs the method. Helper function for HandleMessage().
   void RunMethod(base::TimeTicks start_time,
                  SignalCallback signal_callback,
@@ -236,6 +240,34 @@ class ObjectProxy : public base::RefCountedThreadSafe<ObjectProxy> {
                          ResponseCallback response_callback,
                          ErrorResponse* error_response);
 
+  // Adds the match rule to the bus and associate the callback with the signal.
+  bool AddMatchRuleWithCallback(const std::string& match_rule,
+                                const std::string& absolute_signal_name,
+                                SignalCallback signal_callback);
+
+  // Adds the match rule to the bus so that HandleMessage can see the signal.
+  bool AddMatchRuleWithoutCallback(const std::string& match_rule,
+                                   const std::string& absolute_signal_name);
+
+  // Calls D-Bus's GetNameOwner method asynchronously to update the owner of
+  // |service_name_|.
+  DBusHandlerResult UpdateNameOwnerAsync(scoped_ptr<Signal> pending_signal);
+
+  // Handles NameOwnerChanged signal from D-Bus's special message bus.
+  DBusHandlerResult HandleNameOwnerChanged(dbus::Signal* signal);
+
+  // Helper Processes the response of GetNameOwner method call.
+  void OnGetNameOwner(Signal* signal, Response* callback);
+
+  // Helper function for OnGetNameOwner.
+  void OnGetNameOwnerOnDbusThread(Signal* signal, Response* callback);
+
+  // Processes the error response of GetNameOwner method call.
+  void OnGetNameOwnerError(Signal* signal, ErrorResponse* callback);
+
+  // Helper function for OnGetNameOwnerError.
+  void OnGetNameOwnerErrorOnDbusThread(Signal* signal, ErrorResponse* callback);
+
   scoped_refptr<Bus> bus_;
   std::string service_name_;
   ObjectPath object_path_;
@@ -252,6 +284,9 @@ class ObjectProxy : public base::RefCountedThreadSafe<ObjectProxy> {
 
   const bool ignore_service_unknown_errors_;
 
+  // Known name owner of the well-known bus name represnted by |service_name_|.
+  std::string service_name_owner_;
+
   DISALLOW_COPY_AND_ASSIGN(ObjectProxy);
 };