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

     2 //

     3 // Copyright (c) 2006 Georgia Tech Research Corporation

     4 // All rights reserved.

     5 //

     6 // This program is free software; you can redistribute it and/or modify

     7 // it under the terms of the GNU General Public License version 2 as

     8 // published by the Free Software Foundation;

     9 //

    10 // This program is distributed in the hope that it will be useful,

    11 // but WITHOUT ANY WARRANTY; without even the implied warranty of

    12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    13 // GNU General Public License for more details.

    14 //

    15 // You should have received a copy of the GNU General Public License

    16 // along with this program; if not, write to the Free Software

    17 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    18 //

    19 // Author: George F. Riley<riley@ece.gatech.edu>

    20 //

    21 

    22 // NS3 - Layer 3 Protocol base class

    23 // George F. Riley, Georgia Tech, Spring 2007

    24 

    25 #ifndef L3_PROTOCOL_H

    26 #define L3_PROTOCOL_H

    27 

    28 namespace ns3 {

    29 

    30 class Packet;

    31 class NetDevice;

    32 

    33 

    34 /**

    35  * ::Send is always defined in subclasses.

    36  */

    37 class L3Protocol {

    38 public:

    39   L3Protocol(int protocolNumber, int version);

    40   virtual ~L3Protocol ();

    41     

    42   int GetProtocolNumber (void) const;

    43   int GetVersion() const;

    44 

    45   virtual L3Protocol* Copy() const = 0;

    46   /**

    47    * Lower layer calls this method after calling L3Demux::Lookup

    48    * The ARP subclass needs to know from which NetDevice this

    49    * packet is coming to:

    50    *    - implement a per-NetDevice ARP cache

    51    *    - send back arp replies on the right device

    52    */

    53   virtual void Receive(Packet& p, NetDevice &device) = 0;

    54 

    55  private:

    56   int m_protocolNumber;

    57   int m_version;

    58 };

    59 

    60 } // Namespace ns3

    61 

    62 #endif