author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Sat, 16 Jun 2007 17:15:58 +0200 | |
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
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/* |
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* Copyright (c) 2005 INRIA |
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* All rights reserved. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation; |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
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*/ |
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#ifndef HEADER_H |
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#define HEADER_H |
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#include "chunk.h" |
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namespace ns3 { |
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/** |
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* \brief Protocol header serialization and deserialization. |
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* |
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* Every Protocol header which needs to be inserted or removed |
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* from a Packet instance must derive from this abstract base class |
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* and implement the private pure virtual methods listed below: |
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* - ns3::Header::SerializeTo |
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* - ns3::Header::DeserializeFrom |
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* - ns3::Header::GetSerializedSize |
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* - ns3::Header::PrintTo |
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*/ |
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class Header : public Chunk { |
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public: |
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virtual ~Header (); |
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private: |
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/** |
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* \param os the std output stream in which this |
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* protocol header must print itself. |
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*/ |
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virtual void PrintTo (std::ostream &os) const = 0; |
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/** |
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* \returns the size of the serialized Header. |
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* |
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* This method is used by Packet::AddHeader to reserve |
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* enough room in the packet byte buffer prior to calling |
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* Header::Serialize. |
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*/ |
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virtual uint32_t GetSerializedSize (void) const = 0; |
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/** |
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* \param start the buffer iterator in which the protocol header |
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* must serialize itself. This iterator identifies |
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* the start of the buffer. |
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*/ |
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virtual void SerializeTo (Buffer::Iterator start) const = 0; |
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/** |
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* \param start the buffer iterator from which the protocol header must |
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* deserialize itself. This iterator identifies |
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* the start of the buffer. |
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* \returns the number of bytes read from the buffer |
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* |
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* The value returned is used to trim the packet byte buffer of the |
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* corresponding amount when this method is invoked from |
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* Packet::RemoveHeader |
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*/ |
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virtual uint32_t DeserializeFrom (Buffer::Iterator start) = 0; |
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}; |
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}; // namespace ns3 |
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#endif /* HEADER_H */ |