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4307 mejdrech 1 
/*
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 * Copyright (c) 2009 Lukas Mejdrech
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup packet
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 *  @{
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 */
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/** @file
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 *  Packet client interface implementation for standalone remote modules.
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 *  @see packet_client.h
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 */
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#include <async.h>
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#include <errno.h>
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#include <ipc/ipc.h>
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#include <sys/mman.h>
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#include "../../err.h"
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#include "../../messages.h"
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#include "packet.h"
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#include "packet_client.h"
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#include "packet_header.h"
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#include "packet_messages.h"
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/** Obtains the packet from the packet server as the shared memory block.
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 *  Creates the local packet mapping as well.
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 *  @param phone The packet server module phone. Input parameter.
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 *  @param packet The packet reference pointer to store the received packet reference. Output parameter.
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 *  @param packet_id The packet identifier. Input parameter.
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 *  @param size The packet total size in bytes. Input parameter.
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 *  @returns EOK on success.
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 *  @returns Other error codes as defined for the pm_add() function.
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 *  @returns Other error codes as defined for the ipc_share_in_start() function.
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 */
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int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size );
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int packet_translate( int phone, packet_ref packet, packet_id_t packet_id ){
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    ERROR_DECLARE;
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    unsigned int        size;
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    packet_t            next;
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    if( ! packet ) return EINVAL;
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    * packet = pm_find( packet_id );
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    if( !( * packet )){
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        ERROR_PROPAGATE( async_req_1_1( phone, NET_PACKET_GET_SIZE, packet_id, & size ));
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        ERROR_PROPAGATE( packet_return( phone, packet, packet_id, size ));
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    }
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    if(( ** packet ).next ){
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        return packet_translate( phone, & next, ( ** packet ).next );
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    }else return EOK;
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}
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int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size ){
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    ERROR_DECLARE;
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    aid_t       message;
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    ipc_call_t  answer;
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    ipcarg_t    result;
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    message = async_send_1( phone, NET_PACKET_GET, packet_id, & answer );
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    * packet = ( packet_t ) as_get_mappable_page( size );
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    if( ERROR_OCCURRED( ipc_share_in_start_0_0( phone, * packet, size ))
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    || ERROR_OCCURRED( pm_add( * packet ))){
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        munmap( * packet, size );
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        async_wait_for( message, NULL );
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        return ERROR_CODE;
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    }
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    async_wait_for( message, & result );
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    return result;
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}
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packet_t packet_get_4( int phone, size_t max_content, size_t addr_len, size_t max_prefix, size_t max_suffix ){
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    ERROR_DECLARE;
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    packet_id_t packet_id;
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    unsigned int size;
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    packet_t packet;
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    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 ))){
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        return NULL;
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    }
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    packet = pm_find( packet_id );
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    if( ! packet ){
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        if( ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){
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            return NULL;
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        }
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    }
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    return packet;
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}
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packet_t packet_get_1( int phone, size_t content ){
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    ERROR_DECLARE;
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    packet_id_t packet_id;
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    unsigned int    size;
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    packet_t    packet;
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    if( ERROR_OCCURRED( async_req_1_2( phone, NET_PACKET_CREATE_1, content, ( ipcarg_t * ) & packet_id, & size ))){
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        return NULL;
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    }
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    packet = pm_find( packet_id );
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    if( ! packet ){
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        if( ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){
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            return NULL;
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        }
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    }
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    return packet;
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}
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void pq_release( int phone, packet_id_t packet_id ){
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    async_msg_1( phone, NET_PACKET_RELEASE, packet_id );
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}
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/** @}
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 */