diff -cr ns-3.24.orig/dce/source/ns-3-dce/helper/linux-stack-helper.h b/dce/source/ns-3-dce/helper/linux-stack-helper.h
*** ns-3.24.orig/dce/source/ns-3-dce/helper/linux-stack-helper.h	2015-09-22 10:00:39.000000000 -0500
--- ns-3.24.patched/dce/source/ns-3-dce/helper/linux-stack-helper.h	2015-09-26 09:25:37.463703026 -0500
***************
*** 112,117 ****
--- 112,130 ----
                           void (*callback)(std::string, std::string));
  
    /**
+    * Obtain Linux kernel state with traditional 'sysctl' interface.
+    * (this method uses the ns3 Callback "closure" mechanism.)
+    *
+    * \param node The node pointer Ptr<Node> that will ask the status.
+    * \param at the delta from the begining of simulation to ask this query.
+    * \param path a string value for sysctl parameter. it starts from '.' following the name of parameter.
+    *             e.g., ".net.ipv4.conf.default.forwarding"
+    * \param a Callback<void,std::string,std::string>
+    */
+   static void SysctlGet (Ptr<Node> node, Time at, std::string path,
+                          Callback<void,std::string,std::string> callback);
+   
+   /**
     * Populate routing information to all the nodes in network from GlobalRoutingTable.
     *
     * Limitation:
***************
*** 137,142 ****
--- 150,157 ----
    static void SysctlGetCallback (Ptr<Node> node, std::string path,
                                   void (*callback)(std::string, std::string));
  
+   static void SysctlGetCallback2 (Ptr<Node> node, std::string path,
+                                   Callback<void,std::string,std::string> callback);
  
  };
  
diff -cr ns-3.24.orig/dce/source/ns-3-dce/helper/linux-stack-helper.cc ns-3.24.patched/dce/source/ns-3-dce/helper/linux-stack-helper.cc
*** ns-3.24.orig/dce/source/ns-3-dce/helper/linux-stack-helper.cc	2015-09-22 10:00:39.000000000 -0500
--- ns-3.24.patched/dce/source/ns-3-dce/helper/linux-stack-helper.cc	2015-09-26 09:23:03.766004465 -0500
***************
*** 172,177 ****
--- 180,227 ----
    return;
  #endif
  }
+ 
+ void
+ LinuxStackHelper::SysctlGetCallback2 (Ptr<Node> node, std::string path,
+                                       Callback<void,std::string,std::string> callback)
+ {
+ #ifdef KERNEL_STACK
+   Ptr<LinuxSocketFdFactory> sock = node->GetObject<LinuxSocketFdFactory> ();
+   if (!sock)
+     {
+       callback ("error", "no socket factory");
+       NS_ASSERT_MSG (0, "No LinuxSocketFdFactory is installed. "
+                      "You may need to do it via DceManagerHelper::Install ()");
+       return;
+     }
+ 
+   std::string value = sock->Get (path);
+   callback (path, value);
+   return;
+ #endif
+ }
+ 
+ void
+ LinuxStackHelper::SysctlGet (Ptr<Node> node, Time at, std::string path,
+                              Callback<void,std::string,std::string> callback)
+ {
+ #ifdef KERNEL_STACK
+   Ptr<LinuxSocketFdFactory> sock = node->GetObject<LinuxSocketFdFactory> ();
+   if (!sock)
+     {
+       callback ("error", "no socket factory");
+       NS_ASSERT_MSG (0, "No LinuxSocketFdFactory is installed. "
+                      "You may need to do it via DceManagerHelper::Install ()");
+       return;
+     }
+   Simulator::ScheduleWithContext (node->GetId (), at,
+                                   &LinuxSocketFdFactory::ScheduleTask, sock,
+                                   MakeEvent (&LinuxStackHelper::SysctlGetCallback2,
+                                              node, path, callback));
+   return;
+ #endif
+ }
+ 
  void
  LinuxStackHelper::SysctlSet (NodeContainer c, std::string path, std::string value)
  {