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/*
 * Copyright (c) 2009 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 arp
 *  @{
 */

/** @file
 *  ARP module interface.
 *  The same interface is used for standalone remote modules as well as for bundle modules.
 *  The standalone remote modules have to be compiled with the arp_remote.c source file.
 *  The bundle modules with the arp.c source file.
 */

#ifndef __NET_ARP_INTERFACE_H__
#define __NET_ARP_INTERFACE_H__

#include "../structures/measured_strings.h"

#include "device.h"

/** @name ARP module interface
 *  This interface is used by other modules.
 */
/*@{*/

/** Registers the new device and the requesting protocol service.
 *  Connects to the network interface layer service.
 *  Determines the device broadcast address, its address lengths and packet size.
 *  @param[in] arp_phone The ARP module phone used for (semi)remote calls.
 *  @param[in] device_id The new device identifier.
 *  @param[in] protocol The requesting protocol service.
 *  @param[in] netif The underlying device network interface layer service.
 *  @param[in] address The local requesting protocol address of the device.
 *  @returns EOK on success.
 *  @returns EEXIST if the device is already used.
 *  @returns ENOMEM if there is not enough memory left.
 *  @returns ENOENT if the network interface service is not known.
 *  @returns EREFUSED if the network interface service is not responding.
 *  @returns Other error codes as defined for the nil_packet_get_size() function.
 *  @returns Other error codes as defined for the nil_get_addr() function.
 *  @returns Other error codes as defined for the nil_get_broadcast_addr() function.
 */
int arp_device_req( int arp_phone, device_id_t device_id, services_t protocol, services_t netif, measured_string_ref address );

/** Translates the given protocol address to the network interface address.
 *  Broadcasts the ARP request if the mapping is not found.
 *  Allocates and returns the needed memory block as the data parameter.
 *  @param[in] arp_phone The ARP module phone used for (semi)remote calls.
 *  @param[in] device_id The device identifier.
 *  @param[in] protocol The requesting protocol service.
 *  @param[in] address The local requesting protocol address.
 *  @param[out] translation The translation of the local protocol address.
 *  @param[out] data The allocated raw translation data container.
 *  @returns EOK on success.
 *  @returns EINVAL if the address parameter is NULL.
 *  @returns EBADMEM if the translation or the data parameters are NULL.
 *  @returns ENOENT if the mapping is not found.
 */
int arp_translate_req( int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address, measured_string_ref * translation, char ** data );

/** Clears the device cache.
 *  @param[in] arp_phone The ARP module phone used for (semi)remote calls.
 *  @param[in] device_id The device identifier.
 *  @returns EOK on success.
 *  @returns ENOENT if the device is not found.
 */
int arp_clear_device_req( int arp_phone, device_id_t device_id );

/** Clears the given protocol address from the cache.
 *  @param[in] arp_phone The ARP module phone used for (semi)remote calls.
 *  @param[in] device_id The device identifier.
 *  @param[in] protocol The requesting protocol service.
 *  @param[in] address The protocol address to be cleared.
 *  @returns EOK on success.
 *  @returns ENOENT if the mapping is not found.
 */
int arp_clear_address_req( int arp_phone, device_id_t device_id, services_t protocol, measured_string_ref address );

/** Cleans the cache.
 *  @param[in] arp_phone The ARP module phone used for (semi)remote calls.
 *  @returns EOK on success.
 */
int arp_clean_cache_req( int arp_phone );

/** Connects to the ARP module.
 *  @param service The ARP module service. Ignored parameter.
 *  @returns The ARP module phone on success.
 *  @returns 0 if called by the bundle module.
 */
int arp_connect_module( services_t service );

/** Returns the ARP task identifier.
 *  @returns The current task identifier if called by the bundle module.
 *  @returns 0 if called by the remote module.
 */
task_id_t   arp_task_get_id( void );

/*@}*/

#endif

/** @}
 */