/usr/include/libktorrent/utp/packetbuffer.h is in libktorrent-dev 1.3.1-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2011 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef UTP_PACKETBUFFER_H_
#define UTP_PACKETBUFFER_H_
#include <QSharedPointer>
#include <ktorrent_export.h>
#include <util/constants.h>
#include <util/circularbuffer.h>
#include <util/bufferpool.h>
namespace utp
{
class Header;
/**
* Special packet buffer for UTP packets
**/
class KTORRENT_EXPORT PacketBuffer
{
public:
PacketBuffer();
PacketBuffer(const PacketBuffer & buf);
virtual ~PacketBuffer();
/**
* Is the buffer empty
* */
bool isEmpty() const {return size == 0;}
/**
* Set the packet's header.
* @param header Header
* @param extension_length Length of the extension header
* @return False if there is not enough head room, true otherwise
**/
bool setHeader(const Header & hdr, bt::Uint32 extension_length);
/// Get a pointer to the extension data
bt::Uint8* extensionData() {return extension;}
/**
* Fill with data from a circular buffer. This will invalidate already filled in headers.
* @param cbuf The buffer
* @param to_read Amount to read
* @return The amount used as payload
**/
bt::Uint32 fillData(bt::CircularBuffer & cbuf, bt::Uint32 to_read);
/**
* Fill with data from a buffer.
* @param data The data to copy from
* @param data_size The data size
* @return The amount used as payload
**/
bt::Uint32 fillData(const bt::Uint8* data, bt::Uint32 data_size);
/**
* For testing purpoes fill with dummy data.
* @param amount Amount to fill
* */
void fillDummyData(bt::Uint32 amount);
/**
* Clear the PacketBufferDataPool
**/
static void clearPool();
/// Get the data pointer
const bt::Uint8* data() const {return header;}
/// Get the buffer size
bt::Uint32 bufferSize() const {return size;}
/// Get the size of the payload
bt::Uint32 payloadSize() const {return payload ? (buffer->get() + MAX_SIZE) - payload: 0;}
/// Get the amount of headroom (room in front of payload)
bt::Uint32 headRoom() const {return payload ? payload - buffer->get() : MAX_SIZE;}
static const bt::Uint32 MAX_SIZE = 1500;
private:
bt::Buffer::Ptr buffer;
bt::Uint8* header;
bt::Uint8* extension;
bt::Uint8* payload;
bt::Uint32 size;
static bt::BufferPool::Ptr pool;
};
}
#endif /* PACKETBUFFER_H_ */
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