136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
/*
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* Copyright (C) 2012 Tobias Brunner
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* Copyright (C) 2005-2006 Martin Willi
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* Copyright (C) 2005 Jan Hutter
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/**
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* @defgroup packet packet
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* @{ @ingroup networking
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*/
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#ifndef PACKET_H_
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#define PACKET_H_
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typedef struct packet_t packet_t;
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#include <library.h>
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#include <networking/host.h>
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/**
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* Abstraction of an IP/UDP-Packet, contains data, sender and receiver.
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*/
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struct packet_t {
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/**
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* Set the source address.
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*
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* @param source address to set as source (gets owned)
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*/
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void (*set_source)(packet_t *packet, host_t *source);
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/**
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* Set the destination address.
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*
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* @param source address to set as destination (gets owned)
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*/
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void (*set_destination)(packet_t *packet, host_t *destination);
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/**
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* Get the source address.
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*
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* @return source address (internal data)
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*/
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host_t *(*get_source)(packet_t *packet);
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/**
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* Get the destination address.
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*
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* @return destination address (internal data)
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*/
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host_t *(*get_destination)(packet_t *packet);
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/**
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* Get the data from the packet.
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*
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* @return chunk containing the data (internal data)
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*/
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chunk_t (*get_data)(packet_t *packet);
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/**
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* Set the data in the packet.
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*
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* @param data chunk with data to set (gets owned)
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*/
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void (*set_data)(packet_t *packet, chunk_t data);
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/**
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* Get the DiffServ Code Point set on this packet.
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*
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* @return DSCP value
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*/
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u_int8_t (*get_dscp)(packet_t *this);
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/**
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* Set the DiffServ Code Point to use on this packet.
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*
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* @param value DSCP value
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*/
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void (*set_dscp)(packet_t *this, u_int8_t value);
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/**
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* Increase the offset where the actual packet data starts.
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*
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* The total offset applies to future calls of get_data() and clone().
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*
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* @note The offset is reset to 0 when set_data() is called.
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*
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* @param bytes the number of additional bytes to skip
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*/
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void (*skip_bytes)(packet_t *packet, size_t bytes);
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/**
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* Clones a packet_t object.
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*
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* @note Data is cloned without skipped bytes.
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*
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* @param clone clone of the packet
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*/
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packet_t* (*clone)(packet_t *packet);
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/**
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* Destroy the packet, freeing contained data.
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*/
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void (*destroy)(packet_t *packet);
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};
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/**
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* Create an empty packet
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*
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* @return packet_t object
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*/
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packet_t *packet_create();
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/**
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* Create a packet from the supplied data
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*
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* @param src source address (gets owned)
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* @param dst destination address (gets owned)
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* @param data packet data (gets owned)
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* @return packet_t object
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*/
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packet_t *packet_create_from_data(host_t *src, host_t *dst, chunk_t data);
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#endif /** PACKET_H_ @}*/
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