/* -*- 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 INTERNET_STACK_HELPER_H

#define INTERNET_STACK_HELPER_H

#include "node-container.h"

#include "net-device-container.h"

#include "ns3/packet.h"

#include "ns3/ptr.h"

#include "ns3/object-factory.h"

#include "ns3/ipv4-l3-protocol.h"

#include "ns3/ipv6-l3-protocol.h"

namespace ns3 {

class Node;

class Ipv4RoutingHelper;

class Ipv6RoutingHelper;

/**

 * \brief aggregate IP/TCP/UDP functionality to existing Nodes.

 */

{

public:

  /**

   * Create a new InternetStackHelper which uses a mix of static routing

   * and global routing by default. The static routing protocol 

   * (ns3::Ipv4StaticRouting) and the global routing protocol are

   * stored in an ns3::Ipv4ListRouting protocol with priorities 0, and -10

   * by default. If you wish to use different priorites and different

   * routing protocols, you need to use an adhoc ns3::Ipv4RoutingHelper, 

   * such as ns3::OlsrHelper

   */

  InternetStackHelper(void);

  /**

   * Destroy the InternetStackHelper

   */

  virtual ~InternetStackHelper(void);

  InternetStackHelper (const InternetStackHelper &);

  InternetStackHelper &operator = (const InternetStackHelper &o);

  /**

   * Return helper internal state to that of a newly constructed one

   */

  void Reset (void);

  /**

   * \param routing a new routing helper

   *

   * Set the routing helper to use during Install. The routing

   * helper is really an object factory which is used to create 

   * an object of type ns3::Ipv4RoutingProtocol per node. This routing

   * object is then associated to a single ns3::Ipv4 object through its 

   * ns3::Ipv4::SetRoutingProtocol.

   */

  void SetRoutingHelper (const Ipv4RoutingHelper &routing);

  /**

   * \brief Set IPv6 routing helper.

   * \param routing IPv6 routing helper

   */

  void SetRoutingHelper (const Ipv6RoutingHelper &routing);

  /**

   * Aggregate implementations of the ns3::Ipv4, ns3::Ipv6, ns3::Udp, and ns3::Tcp classes

   * onto the provided node.  This method will assert if called on a node that 

   * already has an Ipv4 object aggregated to it.

   * 

   * \param nodeName The name of the node on which to install the stack.

   */

  void Install (std::string nodeName) const;

  /**

   * Aggregate implementations of the ns3::Ipv4, ns3::Ipv6, ns3::Udp, and ns3::Tcp classes

   * onto the provided node.  This method will assert if called on a node that 

   * already has an Ipv4 object aggregated to it.

   * 

   * \param node The node on which to install the stack.

   */

  void Install (Ptr<Node> node) const;

  /**

   * For each node in the input container, aggregate implementations of the 

   * ns3::Ipv4, ns3::Ipv6, ns3::Udp, and, ns3::Tcp classes.  The program will assert 

   * if this method is called on a container with a node that already has

   * an Ipv4 object aggregated to it.

   * 

   * \param c NodeContainer that holds the set of nodes on which to install the

   * new stacks.

   */

  void Install (NodeContainer c) const;

  /**

   * Aggregate IPv4, IPv6, UDP, and TCP stacks to all nodes in the simulation

   */

  void InstallAll (void) const;

  /**

   * \brief set the Tcp stack which will not need any other parameter.  

   *

   * This function sets up the tcp stack to the given TypeId. It should not be 

   * used for NSC stack setup because the nsc stack needs the Library attribute

   * to be setup, please use instead the version that requires an attribute

   * and a value. If you choose to use this function anyways to set nsc stack

   * the default value for the linux library will be used: "liblinux2.6.26.so".

   *

   * \param tid the type id, typically it is set to  "ns3::TcpL4Protocol"

   */

  void SetTcp(std::string tid);

  /**

   * \brief This function is used to setup the Network Simulation Cradle stack with library value.

   * 

   * Give the NSC stack a shared library file name to use when creating the 

   * stack implementation.  The attr string is actually the attribute name to 

   * be setup and val is its value. The attribute is the stack implementation 

   * to be used and the value is the shared library name.

   * 

   * \param tid The type id, for the case of nsc it would be "ns3::NscTcpL4Protocol" 

   * \param attr The attribute name that must be setup, for example "Library"

   * \param val The attribute value, which will be in fact the shared library name (example:"liblinux2.6.26.so")

   */

  void SetTcp (std::string tid, std::string attr, const AttributeValue &val); 

  /**

   * \brief Enable/disable IPv4 stack install.

   * \param enable enable state

   */

  void SetIpv4StackInstall (bool enable);

  /**

   * \brief Enable/disable IPv6 stack install.

   * \param enable enable state

   */

  void SetIpv6StackInstall (bool enable);

private:

  void Initialize (void);

  ObjectFactory m_tcpFactory;

  const Ipv4RoutingHelper *m_routing;

  /**

   * \internal

   * \brief IPv6 routing helper.

   */

  const Ipv6RoutingHelper *m_routingv6;

  /**

   * \internal

   */

  static void CreateAndAggregateObjectFromTypeId (Ptr<Node> node, const std::string typeId);

  /**

   * \internal

   */

  static void Cleanup (void);

  /**

   * \internal

   */

  static void LogRxIp (std::string context, Ptr<const Packet> packet, uint32_t deviceId);

  /**

   * \internal

   */

  static void LogTxIp (std::string context, Ptr<const Packet> packet, uint32_t deviceId);

  /**

   * \internal

   */

  static Ptr<PcapWriter> GetStream (uint32_t nodeId, uint32_t interfaceId);

  struct Trace {

    uint32_t nodeId;

    uint32_t interfaceId;

    Ptr<PcapWriter> writer;

  };

  /**

   * \internal

   */

  static void AsciiDropEventIpv4 (Ptr<AsciiWriter> writer, std::string path,

                                  Ipv4Header const &header, Ptr<const Packet> packet,

                                  Ipv4L3Protocol::DropReason reason, uint32_t interface);

  /**

   * \internal

   */

  static void AsciiDropEventArp (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);

  /**

   * \internal

   */

  static void AsciiDropEventIpv6 (Ptr<AsciiWriter> writer, std::string path,

                                  Ipv6Header const &header, Ptr<const Packet> packet,

                                  Ipv6L3Protocol::DropReason reason, uint32_t interface);

  static std::string m_pcapBaseFilename;

  /**

   * \internal

   */

  static uint32_t GetNodeIndex (std::string context);

  static std::vector<Trace> m_traces;

  /**

   * \brief IPv4 install state (enabled/disabled) ?

   */

  bool m_ipv4Enabled;

  /**

   * \brief IPv6 install state (enabled/disabled) ?

   */

  bool m_ipv6Enabled;

};

} // namespace ns3

#endif /* INTERNET_STACK_HELPER_H */