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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 packet
 *  @{
 */

/** @file
 *  Packet client interface implementation for standalone remote modules.
 *  @see packet_client.h
 */

#include <async.h>
#include <errno.h>

#include <ipc/ipc.h>
#include <sys/mman.h>

#include "../../err.h"
#include "../../messages.h"

#include "packet.h"
#include "packet_client.h"
#include "packet_header.h"
#include "packet_messages.h"

/** Obtains the packet from the packet server as the shared memory block.
 *  Creates the local packet mapping as well.
 *  @param[in] phone The packet server module phone.
 *  @param[out] packet The packet reference pointer to store the received packet reference.
 *  @param[in] packet_id The packet identifier.
 *  @param[in] size The packet total size in bytes.
 *  @returns EOK on success.
 *  @returns Other error codes as defined for the pm_add() function.
 *  @returns Other error codes as defined for the ipc_share_in_start() function.
 */
int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size );

int packet_translate( int phone, packet_ref packet, packet_id_t packet_id ){
    ERROR_DECLARE;

    unsigned int        size;
    packet_t            next;

    if( ! packet ) return EINVAL;
    * packet = pm_find( packet_id );
    if( !( * packet )){
        ERROR_PROPAGATE( async_req_1_1( phone, NET_PACKET_GET_SIZE, packet_id, & size ));
        ERROR_PROPAGATE( packet_return( phone, packet, packet_id, size ));
    }
    if(( ** packet ).next ){
        return packet_translate( phone, & next, ( ** packet ).next );
    }else return EOK;
}

int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size ){
    ERROR_DECLARE;

    aid_t       message;
    ipc_call_t  answer;
    ipcarg_t    result;

    message = async_send_1( phone, NET_PACKET_GET, packet_id, & answer );
    * packet = ( packet_t ) as_get_mappable_page( size );
    if( ERROR_OCCURRED( ipc_share_in_start_0_0( phone, * packet, size ))
    || ERROR_OCCURRED( pm_add( * packet ))){
        munmap( * packet, size );
        async_wait_for( message, NULL );
        return ERROR_CODE;
    }
    async_wait_for( message, & result );
    return result;
}

packet_t packet_get_4( int phone, size_t max_content, size_t addr_len, size_t max_prefix, size_t max_suffix ){
    ERROR_DECLARE;

    packet_id_t packet_id;
    unsigned int size;
    packet_t packet;

    if( ERROR_OCCURRED( async_req_4_2( phone, NET_PACKET_CREATE_4, max_content, addr_len, max_prefix, max_suffix, ( ipcarg_t * ) & packet_id, & size ))){
        return NULL;
    }
    packet = pm_find( packet_id );
    if( ! packet ){
        if( ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){
            return NULL;
        }
    }
    return packet;
}

packet_t packet_get_1( int phone, size_t content ){
    ERROR_DECLARE;

    packet_id_t packet_id;
    unsigned int    size;
    packet_t    packet;

    if( ERROR_OCCURRED( async_req_1_2( phone, NET_PACKET_CREATE_1, content, ( ipcarg_t * ) & packet_id, & size ))){
        return NULL;
    }
    packet = pm_find( packet_id );
    if( ! packet ){
        if( ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){
            return NULL;
        }
    }
    return packet;
}

void pq_release( int phone, packet_id_t packet_id ){
    async_msg_1( phone, NET_PACKET_RELEASE, packet_id );
}

/** @}
 */