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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. /** @file
  34.  *  Packet client interface implementation for standalone remote modules.
  35.  *  @see packet_client.h
  36.  */
  37.  
  38. #include <async.h>
  39.  
  40. #include <ipc/ipc.h>
  41. #include <sys/mman.h>
  42.  
  43. #include "../../err.h"
  44. #include "../../messages.h"
  45.  
  46. #include "packet.h"
  47. #include "packet_client.h"
  48. #include "packet_messages.h"
  49.  
  50. /** Obtains the packet from the packet server as the shared memory block.
  51.  *  Creates the local packet mapping as well.
  52.  *  @param phone The packet server module phone. Input parameter.
  53.  *  @param packet The packet reference pointer to store the received packet reference. Output parameter.
  54.  *  @param packet_id The packet identifier. Input parameter.
  55.  *  @param size The packet total size in bytes. Input parameter.
  56.  *  @returns EOK on success.
  57.  *  \todo ipc_share_in_start() error?
  58.  *  @returns Other error codes as defined for the pm_add() function.
  59.  */
  60. int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size );
  61.  
  62. int packet_translate( int phone, packet_ref packet, packet_id_t packet_id ){
  63.     ERROR_DECLARE;
  64.  
  65.     unsigned int        size;
  66.  
  67.     if( ! packet ) return EINVAL;
  68.     * packet = pm_find( packet_id );
  69.     if( * packet ) return EOK;
  70.     ERROR_PROPAGATE( async_req_1_1( phone, NET_PACKET_GET_SIZE, packet_id, & size ));
  71.     return packet_return( phone, packet, packet_id, size );
  72. }
  73.  
  74. int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size ){
  75.     ERROR_DECLARE;
  76.  
  77.     aid_t       message;
  78.     ipc_call_t  answer;
  79.     ipcarg_t    result;
  80.  
  81.     message = async_send_1( phone, NET_PACKET_GET, packet_id, & answer );
  82.     * packet = ( packet_t ) as_get_mappable_page( size );
  83.     if( ERROR_OCCURRED( ipc_share_in_start_0_0( phone, * packet, size ))
  84.     || ERROR_OCCURRED( pm_add( * packet ))){
  85.         munmap( * packet, size );
  86.         async_wait_for( message, NULL );
  87.         return ERROR_CODE;
  88.     }
  89.     async_wait_for( message, & result );
  90.     return result;
  91. }
  92.  
  93. packet_t packet_get_4( int phone, size_t max_content, size_t addr_len, size_t max_prefix, size_t max_suffix ){
  94.     ERROR_DECLARE;
  95.  
  96.     packet_id_t packet_id;
  97.     unsigned int size;
  98.     packet_t packet;
  99.  
  100.     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 ))
  101.     || ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){
  102.         return NULL;
  103.     }
  104.     return packet;
  105. }
  106.  
  107. packet_t packet_get_1( int phone, size_t content ){
  108.     ERROR_DECLARE;
  109.  
  110.     packet_id_t packet_id;
  111.     unsigned int    size;
  112.     packet_t    packet;
  113.  
  114.     if( ERROR_OCCURRED( async_req_1_2( phone, NET_PACKET_CREATE_1, content, ( ipcarg_t * ) & packet_id, & size ))
  115.     || ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){
  116.         return NULL;
  117.     }
  118.     return packet;
  119. }
  120.  
  121. void pq_release( int phone, packet_id_t packet_id ){
  122.     async_msg_1( phone, NET_PACKET_RELEASE, packet_id );
  123. }
  124.  
  125. /** @}
  126.  */
  127.