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/*
This file is part of GNUnet
Copyright (C) 2009, 2011 GNUnet e.V.
GNUnet 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 3 of the License,
or (at your option) any later version.
GNUnet 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
Affero General Public License for more details.
*/
/**
* @file src/fragmentation/fragmentation.h
* @brief library to help fragment messages
* @author Christian Grothoff
*/
#ifndef FRAGMENTATION_H
#define FRAGMENTATION_H
#include "platform.h"
#include "gnunet_fragmentation_lib.h"
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Header for a message fragment. Followed by the
* original message.
*/
struct FragmentHeader
{
/**
* Message header.
*/
struct GNUNET_MessageHeader header;
/**
* Unique fragment ID.
*/
uint32_t fragment_id GNUNET_PACKED;
/**
* Total message size of the original message.
*/
uint16_t total_size GNUNET_PACKED;
/**
* Absolute offset (in bytes) of this fragment in the original
* message. Will be a multiple of the MTU.
*/
uint16_t offset GNUNET_PACKED;
};
/**
* Message fragment acknowledgement.
*/
struct FragmentAcknowledgement
{
/**
* Message header.
*/
struct GNUNET_MessageHeader header;
/**
* Unique fragment ID.
*/
uint32_t fragment_id GNUNET_PACKED;
/**
* Bits that are being acknowledged, in big-endian.
* (bits that are set correspond to fragments that
* have not yet been received).
*/
uint64_t bits GNUNET_PACKED;
};
GNUNET_NETWORK_STRUCT_END
#endif
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