/*
 * Copyright (c) 2008 Lukas Mejdrech
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup icmp
 * @{
 */

/** @file
 * ICMP module.
 */

#ifndef NET_ICMP_H_
#define NET_ICMP_H_

#include <fibril_synch.h>

#include <net/icmp_codes.h>
#include <net/packet.h>
#include <adt/int_map.h>
#include <icmp_header.h>

/** Type definition of the ICMP reply data.
 * @see icmp_reply
 */
typedef struct icmp_reply icmp_reply_t;

/** Type definition of the ICMP global data.
 * @see icmp_globals
 */
typedef struct icmp_globals icmp_globals_t;

/** Pending replies map.
 *
 * Maps message identifiers to the pending replies.
 * Sending fibril waits for its associated reply event.
 * Receiving fibril sets the associated reply with the return value and signals
 * the event.
 */
INT_MAP_DECLARE(icmp_replies, icmp_reply_t);

/** Echo specific data map.
 *
 * The identifier is used in the future semi-remote calls instead of the ICMP
 * phone.
 */
INT_MAP_DECLARE(icmp_echo_data, icmp_echo_t);

/** ICMP reply data. */
struct icmp_reply {
	/** Reply result. */
	int result;
	/** Safety lock. */
	fibril_mutex_t mutex;
	/** Received or timeouted reply signaling. */
	fibril_condvar_t condvar;
};

/** ICMP global data. */
struct icmp_globals {
	/** IP module phone. */
	int ip_phone;
	/** Packet dimension. */
	packet_dimension_t packet_dimension;
	/** Networking module phone. */
	int net_phone;
	/** Indicates whether ICMP error reporting is enabled. */
	int error_reporting;
	/** Indicates whether ICMP echo replying (ping) is enabled. */
	int echo_replying;
	/** The last used identifier number. */
	icmp_param_t last_used_id;
	/** The budled modules assigned echo specific data. */
	icmp_echo_data_t echo_data;
	/** Echo timeout locks. */
	icmp_replies_t replies;
	/** Safety lock. */
	fibril_rwlock_t lock;
};

#endif

/** @}
 */