text: /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
  
  #ifndef DSR_APPLICATION_HELPER_H
  #define DSR_APPLICATION_HELPER_H
  
  #include "ns3/object-factory.h"
  #include "ns3/ipv4-address.h"
  #include "ns3/node-container.h"
  #include "ns3/application-container.h"
  
  namespace ns3 {
  
  /**
   * \ingroup packetsink
   * \brief A helper to make it easier to instantiate an ns3::PacketSinkApplication
   * on a set of nodes.
   */
  class DsrApplicationHelper
  {
  public:
    /**
     * Create a PacketSinkHelper to make it easier to work with PacketSinkApplications
     *
     * \param protocol the name of the protocol to use to receive traffic
     *        This string identifies the socket factory type used to create
     *        sockets for the applications.  A typical value would be 
     *        ns3::TcpSocketFactory.
     * \param address the address of the sink,
     *
     */
    DsrApplicationHelper (std::string protocol, Address address);
  
    ~DsrApplicationHelper();
  
    /**
     * Helper function used to set the underlying application attributes.
     *
     * \param name the name of the application attribute to set
     * \param value the value of the application attribute to set
     */
    void SetAttribute (std::string name, const AttributeValue &value);
  
    /**
     * Install an ns3::PacketSinkApplication on each node of the input container
     * configured with all the attributes set with SetAttribute.
     *
     * \param c NodeContainer of the set of nodes on which a PacketSinkApplication 
     * will be installed.
     * \returns Container of Ptr to the applications installed.
     */
    ApplicationContainer Install (NodeContainer c) const;
  
    /**
     * Install an ns3::PacketSinkApplication on each node of the input container
     * configured with all the attributes set with SetAttribute.
     *
     * \param node The node on which a PacketSinkApplication will be installed.
     * \returns Container of Ptr to the applications installed.
     */
    ApplicationContainer Install (Ptr<Node> node) const;
  
    /**
     * Install an ns3::PacketSinkApplication on each node of the input container
     * configured with all the attributes set with SetAttribute.
     *
     * \param nodeName The name of the node on which a PacketSinkApplication will be installed.
     * \returns Container of Ptr to the applications installed.
     */
    ApplicationContainer Install (std::string nodeName) const;
  
  private:
    /**
     * Install an ns3::PacketSink on the node configured with all the
     * attributes set with SetAttribute.
     *
     * \param node The node on which an PacketSink will be installed.
     * \returns Ptr to the application installed.
     */
    Ptr<Application> InstallPriv (Ptr<Node> node) const;
    ObjectFactory m_factory; //!< Object factory.
  };
  
  } // namespace ns3
  
  #endif /* DSR_APPLICATION_HELPER_H */
  