flame-protocol.h

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/*
 * Copyright (c) 2009 IITP RAS
 *
 * 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: Kirill Andreev <andreev@iitp.ru>
 */
 
#ifndef FLAME_PROTOCOL_H
#define FLAME_PROTOCOL_H
 
#include "ns3/mesh-l2-routing-protocol.h"
#include "ns3/nstime.h"
#include "ns3/tag.h"
 
#include <map>
 
/**
 * \ingroup mesh
 * \defgroup flame FLAME
 *
 * \brief Forwarding LAyer for MEshing protocol
 *
 * Simple L2.5 mesh routing protocol developed by
 * Herman Elfrink <herman.elfrink@ti-wmc.nl> and presented in
 * "Easy Wireless: broadband ad-hoc networking for emergency services"
 * by Maurits de Graaf et. al. at The Sixth Annual Mediterranean Ad Hoc
 * Networking WorkShop, Corfu, Greece, June 12-15, 2007
 *
 * see also Linux kernel mailing list discussion at
 * http://lkml.org/lkml/2006/5/23/82
 */
namespace ns3
{
namespace flame
{
class FlameProtocolMac;
class FlameHeader;
class FlameRtable;
 
/**
 * \ingroup flame
 * \brief Transmitter and receiver addresses
 */
class FlameTag : public Tag
{
  public:
    /// transmitter for incoming:
    Mac48Address transmitter;
    /// Receiver of the packet:
    Mac48Address receiver;
 
    /**
     * Constructor
     *
     * \param a receiver MAC address
     */
    FlameTag(Mac48Address a = Mac48Address())
        : receiver(a)
    {
    }
 
    /**
     * \brief Get the type ID.
     * \return the object TypeId
     */
    static TypeId GetTypeId();
    // Inherited from Tag
    TypeId GetInstanceTypeId() const override;
    uint32_t GetSerializedSize() const override;
    void Serialize(TagBuffer i) const override;
    void Deserialize(TagBuffer i) override;
    void Print(std::ostream& os) const override;
};
 
/**
 * \ingroup flame
 * \brief FLAME routing protocol
 */
class FlameProtocol : public MeshL2RoutingProtocol
{
  public:
    /**
     * \brief Get the type ID.
     * \return the object TypeId
     */
    static TypeId GetTypeId();
 
    FlameProtocol();
    ~FlameProtocol() override;
 
    // Delete copy constructor and assignment operator to avoid misuse
    FlameProtocol(const FlameProtocol&) = delete;
    FlameProtocol& operator=(const FlameProtocol&) = delete;
 
    void DoDispose() override;
 
    /**
     * Route request, inherited from MeshL2RoutingProtocol
     *
     * \param sourceIface the source interface
     * \param source the source address
     * \param destination the destination address
     * \param packet the packet to route
     * \param protocolType the protocol type
     * \param routeReply the route reply
     * \returns if route exists
     */
    bool RequestRoute(uint32_t sourceIface,
                      const Mac48Address source,
                      const Mac48Address destination,
                      Ptr<const Packet> packet,
                      uint16_t protocolType,
                      RouteReplyCallback routeReply) override;
    /**
     * Cleanup flame headers!
     *
     * \param fromIface the from interface
     * \param source the source address
     * \param destination the destination address
     * \param packet the packet
     * \param protocolType the protocol type
     * \returns if the route removed
     */
    bool RemoveRoutingStuff(uint32_t fromIface,
                            const Mac48Address source,
                            const Mac48Address destination,
                            Ptr<Packet> packet,
                            uint16_t& protocolType) override;
    /**
     * \brief Install FLAME on given mesh point.
     * \param mp the MeshPointDevice
     * \returns true if successful
     *
     * Installing protocol causes installation of its interface MAC plugins.
     *
     * Also MP aggregates all installed protocols, FLAME protocol can be accessed
     * via MeshPointDevice::GetObject<flame::FlameProtocol>();
     */
    bool Install(Ptr<MeshPointDevice> mp);
    /**
     * Get address of this instance
     * \returns the MAC address
     */
    Mac48Address GetAddress();
    /**
     * Statistics
     * \param os the output stream
     */
    void Report(std::ostream& os) const;
    /// Reset statistics function
    void ResetStats();
 
  private:
    /// LLC protocol number reserved by flame
    static const uint16_t FLAME_PROTOCOL = 0x4040;
    /**
     * \brief Handles a packet: adds a routing information and drops packets by TTL or Seqno
     *
     * \param seqno
     * \param source
     * \param flameHdr
     * \param receiver
     * \param fromIface
     * \return true if packet shall be dropped
     */
    bool HandleDataFrame(uint16_t seqno,
                         Mac48Address source,
                         const FlameHeader flameHdr,
                         Mac48Address receiver,
                         uint32_t fromIface);
    /**
     * \name Information about MeshPointDeviceaddress, plugins
     * \{
     */
    typedef std::map<uint32_t, Ptr<FlameProtocolMac>> FlamePluginMap;
    FlamePluginMap m_interfaces; ///< interfaces
    Mac48Address m_address;      ///< address
    //\}
    /**
     * \name Broadcast timers:
     * \{
     */
    Time m_broadcastInterval;
    Time m_lastBroadcast;
    //\}
    /// Max Cost value (or TTL, because cost is actually hopcount)
    uint8_t m_maxCost;
    /// Sequence number:
    uint16_t m_myLastSeqno;
    /// Routing table:
    Ptr<FlameRtable> m_rtable;
 
    /// Statistics structure
    struct Statistics
    {
        uint16_t txUnicast;    ///< transmit unicast
        uint16_t txBroadcast;  ///< transmit broadcast
        uint32_t txBytes;      ///< transmit bytes
        uint16_t droppedTtl;   ///< dropped TTL
        uint16_t totalDropped; ///< total dropped
        /**
         * Print function
         * \param os the output stream to print to
         */
        void Print(std::ostream& os) const;
        /// constructor
        Statistics();
    };
 
    Statistics m_stats; ///< statistics
};
} // namespace flame
} // namespace ns3
#endif /* FLAME_PROTOCOL_H */