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  1. /*
  2.  * Copyright (c) 2009 Lukas Mejdrech
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup packet
  30.  *  @{
  31.  */
  32.  
  33. /**
  34.  * @file
  35.  */
  36.  
  37. #include <async.h>
  38.  
  39. #include <ipc/ipc.h>
  40. #include <sys/mman.h>
  41.  
  42. #include "../../err.h"
  43. #include "../../messages.h"
  44.  
  45. #include "packet.h"
  46. #include "packet_client.h"
  47. #include "packet_messages.h"
  48.  
  49. /** Obtains the packet from the packet server as the shared memory block.
  50.  *  Creates the local packet mapping as well.
  51.  *  @param phone The packet server module phone. Input parameter.
  52.  *  @param packet The packet reference pointer to store the received packet reference. Output parameter.
  53.  *  @param packet_id The packet identifier. Input parameter.
  54.  *  @param size The packet total size in bytes. Input parameter.
  55.  *  @returns EOK on success.
  56.  *  \todo ipc_share_in_start() error?
  57.  *  @returns Other error codes as defined for the pm_add() function.
  58.  */
  59. int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size );
  60.  
  61. int packet_translate( int phone, packet_ref packet, packet_id_t packet_id ){
  62.     ERROR_DECLARE;
  63.  
  64.     unsigned int        size;
  65.  
  66.     if( ! packet ) return EINVAL;
  67.     * packet = pm_find( packet_id );
  68.     if( * packet ) return EOK;
  69.     ERROR_PROPAGATE( async_req_1_1( phone, NET_PACKET_GET_SIZE, packet_id, & size ));
  70.     return packet_return( phone, packet, packet_id, size );
  71. }
  72.  
  73. int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size ){
  74.     ERROR_DECLARE;
  75.  
  76.     aid_t       message;
  77.     ipc_call_t  answer;
  78.     ipcarg_t    result;
  79.  
  80.     message = async_send_1( phone, NET_PACKET_GET, packet_id, & answer );
  81.     * packet = ( packet_t ) as_get_mappable_page( size );
  82.     if( ERROR_OCCURRED( ipc_share_in_start_0_0( phone, * packet, size ))
  83.     || ERROR_OCCURRED( pm_add( * packet ))){
  84.         munmap( * packet, size );
  85.         async_wait_for( message, NULL );
  86.         return ERROR_CODE;
  87.     }
  88.     async_wait_for( message, & result );
  89.     return result;
  90. }
  91.  
  92. packet_t packet_get_4( int phone, size_t max_content, size_t addr_len, size_t max_prefix, size_t max_suffix ){
  93.     ERROR_DECLARE;
  94.  
  95.     packet_id_t packet_id;
  96.     unsigned int size;
  97.     packet_t packet;
  98.  
  99.     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 ))
  100.     || ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){
  101.         return NULL;
  102.     }
  103.     return packet;
  104. }
  105.  
  106. packet_t packet_get_1( int phone, size_t content ){
  107.     ERROR_DECLARE;
  108.  
  109.     packet_id_t packet_id;
  110.     unsigned int    size;
  111.     packet_t    packet;
  112.  
  113.     if( ERROR_OCCURRED( async_req_1_2( phone, NET_PACKET_CREATE_1, content, ( ipcarg_t * ) & packet_id, & size ))
  114.     || ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){
  115.         return NULL;
  116.     }
  117.     return packet;
  118. }
  119.  
  120. void pq_release( int phone, packet_id_t packet_id ){
  121.     async_msg_1( phone, NET_PACKET_RELEASE, packet_id );
  122. }
  123.  
  124. /** @}
  125.  */
  126.