130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/*
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* Copyright (C) 2012-2014 Tobias Brunner
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* HSR 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 ip_packet ip_packet
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* @{ @ingroup libipsec
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*/
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#ifndef IP_PACKET_H_
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#define IP_PACKET_H_
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#include <library.h>
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#include <networking/host.h>
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#include <networking/packet.h>
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typedef struct ip_packet_t ip_packet_t;
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/**
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* IP packet
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*/
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struct ip_packet_t {
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/**
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* IP version of this packet
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*
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* @return ip version
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*/
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uint8_t (*get_version)(ip_packet_t *this);
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/**
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* Get the source address of this packet
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*
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* @return source host
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*/
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host_t *(*get_source)(ip_packet_t *this);
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/**
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* Get the destination address of this packet
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*
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* @return destination host
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*/
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host_t *(*get_destination)(ip_packet_t *this);
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/**
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* Get the protocol (IPv4) or next header (IPv6) field of this packet.
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*
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* @return protocol|next header field
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*/
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uint8_t (*get_next_header)(ip_packet_t *this);
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/**
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* Get the complete IP packet (including the header)
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*
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* @return IP packet (internal data)
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*/
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chunk_t (*get_encoding)(ip_packet_t *this);
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/**
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* Get only the payload
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*
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* @return IP payload (internal data)
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*/
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chunk_t (*get_payload)(ip_packet_t *this);
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/**
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* Clone the IP packet
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*
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* @return clone of the packet
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*/
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ip_packet_t *(*clone)(ip_packet_t *this);
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/**
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* Destroy an ip_packet_t
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*/
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void (*destroy)(ip_packet_t *this);
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};
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/**
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* Create an IP packet out of data from the wire (or decapsulated from another
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* packet).
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*
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* @note The raw IP packet gets either owned by the new object, or destroyed,
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* if the data is invalid.
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*
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* @param packet the IP packet (including header), gets owned
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* @return ip_packet_t instance, or NULL if invalid
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*/
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ip_packet_t *ip_packet_create(chunk_t packet);
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/**
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* Encode an IP packet from the given data.
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*
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* If src and/or dst have ports set they are applied to UDP/TCP headers found
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* in the packet.
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*
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* @param src source address and optional port (cloned)
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* @param dst destination address and optional port (cloned)
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* @param next_header the protocol (IPv4) or next header (IPv6)
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* @param data complete data after basic IP header (cloned)
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* @return ip_packet_t instance, or NULL if invalid
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*/
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ip_packet_t *ip_packet_create_from_data(host_t *src, host_t *dst,
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uint8_t next_header, chunk_t data);
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/**
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* Encode a UDP packet from the given data.
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*
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* @param src source address and port (cloned)
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* @param dst destination address and port (cloned)
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* @param data UDP data (cloned)
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* @return ip_packet_t instance, or NULL if invalid
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*/
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ip_packet_t *ip_packet_create_udp_from_data(host_t *src, host_t *dst,
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chunk_t data);
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#endif /** IP_PACKET_H_ @}*/
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