/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2007-2009 Strasbourg University
 *
 * 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: Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
 */

#ifndef IPV6_RAW_SOCKET_IMPL_H
#define IPV6_RAW_SOCKET_IMPL_H

#include <list>

#include "ns3/socket.h"
#include "ns3/ipv6-address.h"
#include "ns3/ipv6-header.h"

namespace ns3
{

class NetDevice;
class Node;

/**
 * \class Ipv6RawSocketImpl
 * \brief IPv6 raw socket.
 */
class Ipv6RawSocketImpl : public Socket
{
  public:
    /**
     * \brief Get the type ID of this class.
     * \return type ID
     */
    static TypeId GetTypeId ();

    /**
     * \brief Constructor.
     */
    Ipv6RawSocketImpl ();
    
    /**
     * \brief Destructor.
     */
    virtual ~Ipv6RawSocketImpl ();

    /**
     * \brief Set the node.
     * \param node node to set
     */
    void SetNode (Ptr<Node> node);

    /**
     * \brief Get last error number.
     * \return error number
     */
    virtual enum Socket::SocketErrno GetErrno () const;

    /**
     * \brief Get node.
     * \return node associated with this raw socket.
     */
    virtual Ptr<Node> GetNode () const;

    /**
     * \brief Bind the socket to address.
     * \param address bind to this address
     * \return 0 if success, -1 otherwise
     */
    virtual int Bind (const Address& address);

    /**
     * \brief Bind socket.
     * \return 0 if success, -1 otherwise
     */
    virtual int Bind ();

    /**
     * \brief Get socket address.
     * \param address socket address if method success
     * \return 0 if success, -1 otherwise
     */
    virtual int GetSockName (Address& address) const;

    /**
     * \brief Close the socket.
     * \return 0 if success, -1 otherwise
     */
    virtual int Close ();

    /**
     * \brief Shutdown send capability.
     * \return 0 if success, -1 otherwise
     */
    virtual int ShutdownSend ();

    /**
     * \brief Shutdown receive capability.
     * \return 0 if success, -1 otherwise
     */
    virtual int ShutdownRecv ();
     
    /**
     * \brief Connect to address.
     * \param address address
     * \return 0 if success, -1 otherwise
     */
    virtual int Connect (const Address& address);

    /**
     * \brief Listen.
     * \return 0 if success, -1 otherwise
     */
    virtual int Listen ();

    /**
     * \brief Get TX size available.
     * \return TX size
     */
    virtual uint32_t GetTxAvailable () const;

    /**
     * \brief Get RX size available.
     * \return RX size
     */
    virtual uint32_t GetRxAvailable () const;

    /**
     * \brief Send a packet.
     * \param p packet to send
     * \param flags additionnal flags
     * \return 0 if success, -1 otherwise
     */
    virtual int Send (Ptr<Packet> p, uint32_t flags);
    
    /**
     * \brief Send a packet.
     * \param p packet to send
     * \param flags additionnal flags
     * \param toAddress destination address
     * \return 0 if success, -1 otherwise
     */
    virtual int SendTo (Ptr<Packet> p, uint32_t flags, const Address& toAddress);

    /**
     * \brief Receive packet.
     * \param maxSize maximum size
     * \param flags additionnal flags
     * \return packet received
     */
    virtual Ptr<Packet> Recv (uint32_t maxSize, uint32_t flags);
    
    /**
     * \brief Receive packet.
     * \param maxSize maximum size
     * \param flags additionnal flags
     * \param fromAddress source address
     * \return packet received
     */
    virtual Ptr<Packet> RecvFrom (uint32_t maxSize, uint32_t flags, Address& fromAddress);
    
    /**
     * \brief Set protocol field.
     * \param protocol protocol to set
     */
    void SetProtocol (uint16_t protocol);
    
    /**
     * \brief Forward up to receive method.
     * \param p packet
     * \param hdr IPv6 header
     * \param device device
     * \return true if forwarded, false otherwise
     */
    bool ForwardUp (Ptr<const Packet> p, Ipv6Header hdr, Ptr<NetDevice> device);

  private:
    /**
     * \struct Data
     * \brief IPv6 raw data and additionnal information.
     */
    struct Data
    {
      Ptr<Packet> packet; /**< Packet data */
      Ipv6Address fromIp; /**< Source address */
      uint16_t fromProtocol; /**< Protocol used */
    };

    /**
     * \brief Dispose object.
     */
    virtual void DoDispose ();

    /**
     * \brief Last error number.
     */
    enum Socket::SocketErrno m_err;
    
    /**
     * \brief Node.
     */
    Ptr<Node> m_node;

    /**
     * \brief Source address.
     */
    Ipv6Address m_src;

    /**
     * \brief Destination address.
     */
    Ipv6Address m_dst;

    /**
     * \brief Protocol.
     */
    uint16_t m_protocol;

    /**
     * \brief Packet waiting to be processed.
     */
    std::list<struct Data> m_data;

    /**
     * \brief Flag to shutdown send capability.
     */
    bool m_shutdownSend;
    
    /**
     * \brief Flag to shutdown receive capability.
     */
    bool m_shutdownRecv;

    /**
     * \brief ICMPv6 filter.
     */
    uint32_t m_icmpFilter;
};

} /* namespace ns3 */

#endif /* IPV6_RAW_SOCKET_IMPL_H */