/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2008 INRIA

 *

 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#ifndef CSMA_HELPER_H

#define CSMA_HELPER_H

#include <string>

#include <ostream>

#include "ns3/attribute.h"

#include "ns3/object-factory.h"

#include "ns3/net-device-container.h"

#include "ns3/node-container.h"

#include "ns3/csma-channel.h"

#include "ns3/deprecated.h"

namespace ns3 {

class Packet;

class PcapWriter;

/**

 * \brief build a set of CsmaNetDevice objects

 */

class CsmaHelper

{

public:

  CsmaHelper ();

  /**

   * \param type the type of queue

   * \param n1 the name of the attribute to set on the queue

   * \param v1 the value of the attribute to set on the queue

   * \param n2 the name of the attribute to set on the queue

   * \param v2 the value of the attribute to set on the queue

   * \param n3 the name of the attribute to set on the queue

   * \param v3 the value of the attribute to set on the queue

   * \param n4 the name of the attribute to set on the queue

   * \param v4 the value of the attribute to set on the queue

   *

   * Set the type of queue to create and associated to each

   * CsmaNetDevice created through CsmaHelper::Install.

   */

  void SetQueue (std::string type,

                 std::string n1 = "", const AttributeValue &v1 = EmptyAttributeValue (),

                 std::string n2 = "", const AttributeValue &v2 = EmptyAttributeValue (),

                 std::string n3 = "", const AttributeValue &v3 = EmptyAttributeValue (),

                 std::string n4 = "", const AttributeValue &v4 = EmptyAttributeValue ());

  /**

   * \param n1 the name of the attribute to set

   * \param v1 the value of the attribute to set

   *

   * Set these attributes on each ns3::CsmaNetDevice created

   * by CsmaHelper::Install

   */

  void SetDeviceAttribute (std::string n1, const AttributeValue &v1);

  /**

   * \param n1 the name of the attribute to set

   * \param v1 the value of the attribute to set

   *

   * Set these attributes on each ns3::CsmaChannel created

   * by CsmaHelper::Install

   */

  void SetChannelAttribute (std::string n1, const AttributeValue &v1);

  void SetDeviceParameter (std::string n1, const AttributeValue &v1) NS_DEPRECATED;

  void SetChannelParameter (std::string n1, const AttributeValue &v1) NS_DEPRECATED;

  /**

   * \param filename filename prefix to use for pcap files.

   * \param nodeid the id of the node to generate pcap output for.

   * \param deviceid the id of the device to generate pcap output for.

   *

   * Generate a pcap file which contains the link-level data observed

   * by the specified deviceid within the specified nodeid. The pcap

   * data is stored in the file prefix-nodeid-deviceid.pcap.

   *

   * This method should be invoked after the network topology has 

   * been fully constructed.

   */

  static void EnablePcap (std::string filename, uint32_t nodeid, uint32_t deviceid);

  /**

   * \param filename filename prefix to use for pcap files.

   * \param d container of devices of type ns3::CsmaNetDevice

   *

   * Enable pcap output on each input device which is of the

   * ns3::CsmaNetDevice type.

   */

  static void EnablePcap (std::string filename, NetDeviceContainer d);

  /**

   * \param filename filename prefix to use for pcap files.

   * \param n container of nodes.

   *

   * Enable pcap output on each device which is of the

   * ns3::CsmaNetDevice type and which is located in one of the 

   * input nodes.

   */

  static void EnablePcap (std::string filename, NodeContainer n);

  /**

   * \param filename filename prefix to use for pcap files.

   *

   * Enable pcap output on each device which is of the

   * ns3::CsmaNetDevice type

   */

  static void EnablePcapAll (std::string filename);

  /**

   * \param os output stream

   * \param nodeid the id of the node to generate ascii output for.

   * \param deviceid the id of the device to generate ascii output for.

   *

   * Enable ascii output on the specified deviceid within the

   * specified nodeid if it is of type ns3::CsmaNetDevice and dump 

   * that to the specified stdc++ output stream.

   */

  static void EnableAscii (std::ostream &os, uint32_t nodeid, uint32_t deviceid);

  /**

   * \param os output stream

   * \param d device container

   *

   * Enable ascii output on each device which is of the

   * ns3::CsmaNetDevice type and which is located in the input

   * device container and dump that to the specified

   * stdc++ output stream.

   */

  static void EnableAscii (std::ostream &os, NetDeviceContainer d);

  /**

   * \param os output stream

   * \param n node container

   *

   * Enable ascii output on each device which is of the

   * ns3::CsmaNetDevice type and which is located in one

   * of the input node and dump that to the specified

   * stdc++ output stream.

   */

  static void EnableAscii (std::ostream &os, NodeContainer n);

  /**

   * \param os output stream

   *

   * Enable ascii output on each device which is of the

   * ns3::CsmaNetDevice type and dump that to the specified

   * stdc++ output stream.

   */

  static void EnableAsciiAll (std::ostream &os);

  /**

   * This method creates an ns3::CsmaChannel with the attributes configured by

   * CsmaHelper::SetChannelAttribute, an ns3::CsmaNetDevice with the attributes

   * configured by CsmaHelper::SetDeviceAttribute and then adds the device

   * to the node and attaches the channel to the device.

   *

   * \param node The node to install the device in

   * \returns A containter holding the added net device.

   */

  NetDeviceContainer Install (Ptr<Node> node) const;

  /**

   * This method creates an ns3::CsmaNetDevice with the attributes configured by

   * CsmaHelper::SetDeviceAttribute and then adds the device to the node and 

   * attaches the provided channel to the device.

   *

   * \param node The node to install the device in

   * \param channel The chanel to attach to the device.

   * \returns A containter holding the added net device.

   */

  /**

   * This method creates an ns3::CsmaChannel with the attributes configured by

   * CsmaHelper::SetChannelAttribute.  For each Ptr<node> in the provided

   * container: it creates an ns3::CsmaNetDevice (with the attributes 

   * configured by CsmaHelper::SetDeviceAttribute); adds the device to the 

   * node; and attaches the channel to the device.

   *

   * \param c The NodeContainer holding the nodes to be changed.

   * \returns A containter holding the added net devices.

   */

  NetDeviceContainer Install (const NodeContainer &c) const;

  /**

   * For each Ptr<node> in the provided container, this method creates an 

   * ns3::CsmaNetDevice (with the attributes configured by 

   * CsmaHelper::SetDeviceAttribute); adds the device to the node; and attaches 

   * the provided channel to the device.

   *

   * \param c The NodeContainer holding the nodes to be changed.

   * \param channel The channel to attach to the devices.

   * \returns A containter holding the added net devices.

   */

  NetDeviceContainer Install (const NodeContainer &c, Ptr<CsmaChannel> channel) const;

  /**

   * \brief Make a star network topology.

   *

   * Given a pointer to a node that  will become the hub of the star, and a 

   * NodeContainer containing pointers to the nodes that will become the 

   * spokes; we construct CSMA net devices on the hub (corresponding to the 

   * spokes) and store them in the hubDevices NetDeviceContainer.  We add a 

   * net device to each spoke node and store them in the spokeDevices 

   * NetDeviceContainer.  A CSMA is created for each spoke.

   *

   * Usually when one thinks of a star network, one thinks of point-to-point

   * links.  We're just using a single pair of devices on a multi-point-to-point

   * network "drops" as the link.  You are free to add any number of other 

   * devices on the link if you want.

   *

   * The ordering of the devices in the hubDevices container is according to

   * the order of the spokes container -- that is, hubDevices[0] will be the

   * net device used on the hub that talks to spokes[0].  the container entry

   * spokeDevices[0] will have the device that hubDevices[0] talks to -- those

   * two devices are the ones that connect hub to spokes[0].

   *

   * \param hub The central node of the star network

   * \param spokes A NodeContainer of the nodes that will be the spoke (leaf)

   *               nodes

   * \param hubDevices A NetDeviceContainer that will be filled with pointers

   *                   to the point-to-point net devices created on the hub.

   * \param spokeDevices A NetDeviceContainer that will be filled with pointers

   *                    to the point-to-point net devices created on each of 

   *                    the spokes.

   */

  void InstallStar (Ptr<Node> hub, NodeContainer spokes, 

                    NetDeviceContainer& hubDevices, NetDeviceContainer& spokeDevices);

private:

  Ptr<NetDevice> InstallPriv (Ptr<Node> node, Ptr<CsmaChannel> channel) const;

  static void RxEvent (Ptr<PcapWriter> writer, Ptr<const Packet> packet);

  static void EnqueueEvent (Ptr<PcapWriter> writer, Ptr<const Packet> packet);

  static void AsciiEnqueueEvent (std::ostream *os, std::string path, Ptr<const Packet> packet);

  static void AsciiDequeueEvent (std::ostream *os, std::string path, Ptr<const Packet> packet);

  static void AsciiDropEvent (std::ostream *os, std::string path, Ptr<const Packet> packet);

  static void AsciiRxEvent (std::ostream *os, std::string path, Ptr<const Packet> packet);

  ObjectFactory m_queueFactory;

  ObjectFactory m_deviceFactory;

  ObjectFactory m_channelFactory;

};

} // namespace ns3

#endif /* CSMA_HELPER_H */