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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. #include <errno.h>
  40.  
  41. #include <ipc/ipc.h>
  42. #include <sys/mman.h>
  43.  
  44. #include "../../err.h"
  45. #include "../../messages.h"
  46.  
  47. #include "packet.h"
  48. #include "packet_client.h"
  49. #include "packet_header.h"
  50. #include "packet_messages.h"
  51.  
  52. /** Obtains the packet from the packet server as the shared memory block.
  53.  *  Creates the local packet mapping as well.
  54.  *  @param[in] phone The packet server module phone.
  55.  *  @param[out] packet The packet reference pointer to store the received packet reference.
  56.  *  @param[in] packet_id The packet identifier.
  57.  *  @param[in] size The packet total size in bytes.
  58.  *  @returns EOK on success.
  59.  *  @returns Other error codes as defined for the pm_add() function.
  60.  *  @returns Other error codes as defined for the ipc_share_in_start() function.
  61.  */
  62. int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size );
  63.  
  64. int packet_translate( int phone, packet_ref packet, packet_id_t packet_id ){
  65.     ERROR_DECLARE;
  66.  
  67.     unsigned int        size;
  68.     packet_t            next;
  69.  
  70.     if( ! packet ) return EINVAL;
  71.     * packet = pm_find( packet_id );
  72.     if( !( * packet )){
  73.         ERROR_PROPAGATE( async_req_1_1( phone, NET_PACKET_GET_SIZE, packet_id, & size ));
  74.         ERROR_PROPAGATE( packet_return( phone, packet, packet_id, size ));
  75.     }
  76.     if(( ** packet ).next ){
  77.         return packet_translate( phone, & next, ( ** packet ).next );
  78.     }else return EOK;
  79. }
  80.  
  81. int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size ){
  82.     ERROR_DECLARE;
  83.  
  84.     aid_t       message;
  85.     ipc_call_t  answer;
  86.     ipcarg_t    result;
  87.  
  88.     message = async_send_1( phone, NET_PACKET_GET, packet_id, & answer );
  89.     * packet = ( packet_t ) as_get_mappable_page( size );
  90.     if( ERROR_OCCURRED( ipc_share_in_start_0_0( phone, * packet, size ))
  91.     || ERROR_OCCURRED( pm_add( * packet ))){
  92.         munmap( * packet, size );
  93.         async_wait_for( message, NULL );
  94.         return ERROR_CODE;
  95.     }
  96.     async_wait_for( message, & result );
  97.     return result;
  98. }
  99.  
  100. packet_t packet_get_4( int phone, size_t max_content, size_t addr_len, size_t max_prefix, size_t max_suffix ){
  101.     ERROR_DECLARE;
  102.  
  103.     packet_id_t packet_id;
  104.     unsigned int size;
  105.     packet_t packet;
  106.  
  107.     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 ))){
  108.         return NULL;
  109.     }
  110.     packet = pm_find( packet_id );
  111.     if( ! packet ){
  112.         if( ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){
  113.             return NULL;
  114.         }
  115.     }
  116.     return packet;
  117. }
  118.  
  119. packet_t packet_get_1( int phone, size_t content ){
  120.     ERROR_DECLARE;
  121.  
  122.     packet_id_t packet_id;
  123.     unsigned int    size;
  124.     packet_t    packet;
  125.  
  126.     if( ERROR_OCCURRED( async_req_1_2( phone, NET_PACKET_CREATE_1, content, ( ipcarg_t * ) & packet_id, & size ))){
  127.         return NULL;
  128.     }
  129.     packet = pm_find( packet_id );
  130.     if( ! packet ){
  131.         if( ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){
  132.             return NULL;
  133.         }
  134.     }
  135.     return packet;
  136. }
  137.  
  138. void pq_release( int phone, packet_id_t packet_id ){
  139.     async_msg_1( phone, NET_PACKET_RELEASE, packet_id );
  140. }
  141.  
  142. /** @}
  143.  */
  144.