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/*
* Copyright (C) 2006 Tobias Brunner, Daniel Roethlisberger
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*
* $Id: socket.h 4355 2008-09-25 07:56:58Z tobias $
*/
/**
* @defgroup socket socket
* @{ @ingroup network
*/
#ifndef SOCKET_H_
#define SOCKET_H_
typedef struct socket_t socket_t;
#include <library.h>
#include <network/packet.h>
#include <utils/host.h>
#include <utils/linked_list.h>
/**
* Maximum size of a packet.
*
* 3000 Bytes should be sufficient, see IKEv2 RFC. However, we currently
* do not support HASH_AND_URL certificates, so we require to transmit
* the full certificates. To run our multi-CA test with 2 intermediate CAs,
* 5000 bytes is sufficient.
*/
#define MAX_PACKET 5000
/**
* Abstraction of all sockets (IPv4/IPv6 send/receive).
*
* All available sockets are bound and the receive function
* reads from them. There are actually two implementations:
* The first uses raw sockets to allow binding of other daemons (pluto) to
* UDP/500. An installed "Linux socket filter" filters out all non-IKEv2
* traffic and handles just IKEv2 messages. An other daemon (pluto) must
* handle all traffic separately, e.g. ignore IKEv2 traffic, since charon
* handles that.
* The other implementation uses normal sockets and is built if
* --disable-pluto is given to the configure script.
*/
struct socket_t {
/**
* Receive a packet.
*
* Reads a packet from the socket and sets source/dest
* appropriately.
*
* @param packet pinter gets address from allocated packet_t
* @return
* - SUCCESS when packet successfully received
* - FAILED when unable to receive
*/
status_t (*receive) (socket_t *this, packet_t **packet);
/**
* Send a packet.
*
* Sends a packet to the net using destination from the packet.
* Packet is sent using default routing mechanisms, thus the
* source address in packet is ignored.
*
* @param packet packet_t to send
* @return
* - SUCCESS when packet successfully sent
* - FAILED when unable to send
*/
status_t (*send) (socket_t *this, packet_t *packet);
/**
* Destroy socket.
*/
void (*destroy) (socket_t *this);
};
/**
* Create a socket_t, which binds multiple sockets.
*
* @return socket_t object
*/
socket_t *socket_create();
#endif /*SOCKET_H_ @} */
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