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  1. /*
  2.  * Copyright (c) 2008 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 net
  30.  *  @{
  31.  */
  32.  
  33. /** @file
  34.  */
  35.  
  36. #include <async.h>
  37. #include <errno.h>
  38. #include <unistd.h>
  39. //#include <stdio.h>
  40. #include <string.h>
  41.  
  42. #include <ipc/ipc.h>
  43. #include <ipc/services.h>
  44. #include <sys/mman.h>
  45.  
  46. #include "../../err.h"
  47. #include "../../messages.h"
  48.  
  49. #include "packet.h"
  50. #include "packet_header.h"
  51. #include "packet_client.h"
  52.  
  53. int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size );
  54.  
  55. packet_t packet_copy( int phone, services_t owner, const packet_t packet ){
  56.     packet_t    new;
  57.  
  58.     if( ! packet_is_valid( packet )) return NULL;
  59. //  new = ( packet_t ) mmap( NULL, packet->length, PROTO_READ | PROTO_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0 );
  60. //  if( new == MAP_FAILED ) return NULL;
  61. //  memcpy( new, packet, packet->length );
  62.     new = packet_get_1( phone, owner, packet_get_data_length( packet ));
  63.     packet_copy_data( new, packet_get_data( packet ), packet_get_data_length( packet ));
  64.     return new;
  65. }
  66.  
  67. int packet_copy_data( packet_t packet, const void * data, size_t length ){
  68.     if( ! packet_is_valid( packet )) return EINVAL;
  69.     if( packet->data_start + length >= packet->length ) return ENOMEM;
  70.     memcpy(( void * ) packet + packet->data_start, data, length );
  71.     if( packet->data_start + length > packet->data_end ){
  72.         packet->data_end = packet->data_start + length;
  73.     }
  74.     return EOK;
  75. }
  76.  
  77. void * packet_prepend( packet_t packet, size_t length ){
  78.     if(( ! packet_is_valid( packet )) || ( packet->data_start - sizeof( struct packet ) - 2 * packet->addr_len < length )) return NULL;
  79.     packet->data_start -= length;
  80.     return ( void * ) packet + packet->data_start;
  81. }
  82.  
  83. void * packet_append( packet_t packet, size_t length ){
  84.     if(( ! packet_is_valid( packet )) || ( packet->data_end + length >= packet->length )) return NULL;
  85.     packet->data_end += length;
  86.     return ( void * ) packet + packet->data_end - length;
  87. }
  88.  
  89. int packet_trim( packet_t packet, size_t prefix, size_t sufix ){
  90.     if(( ! packet_is_valid( packet )) || ( prefix + sufix > packet->data_end - packet->data_start )) return EINVAL;
  91.     packet->data_start += prefix;
  92.     packet->data_end -= sufix;
  93.     return EOK;
  94. }
  95.  
  96. packet_id_t packet_get_id( packet_t packet ){
  97.     return packet_is_valid( packet ) ? packet->packet_id : 0;
  98. }
  99.  
  100. int packet_get_addr( const packet_t packet, uint8_t ** src, uint8_t ** dest ){
  101.     if( !( packet_is_valid( packet ) && src && dest )) return 0;
  102.     * src = ( void * ) packet + packet->src_addr;
  103.     * dest = ( void * ) packet + packet->dest_addr;
  104.     return packet->addr_len;
  105. }
  106.  
  107. size_t packet_get_data_length( const packet_t packet ){
  108.     if( ! packet_is_valid( packet )) return 0;
  109.     return packet->data_end - packet->data_start;
  110. }
  111.  
  112. void * packet_get_data( const packet_t packet ){
  113.     if( ! packet_is_valid( packet )) return NULL;
  114.     return ( void * ) packet + packet->data_start;
  115. }
  116.  
  117. packet_mode_t packet_get_mode( const packet_t packet ){
  118.     if( packet_is_valid( packet )) return packet->mode;
  119.     return PM_ONEWAY;
  120. }
  121.  
  122. int packet_set_addr( packet_t packet, const uint8_t * src, const uint8_t * dest, size_t addr_len ){
  123.     size_t  padding;
  124.  
  125.     if( !( packet_is_valid( packet ) && ( packet->addr_len >= addr_len ))) return EINVAL;
  126.     padding = packet->addr_len - addr_len;
  127.     if( src ){
  128.         memcpy(( void * ) packet + packet->src_addr, src, addr_len );
  129.         memset(( void * ) packet + packet->src_addr + addr_len, 0, padding );
  130.     }else{
  131.         memset(( void * ) packet + packet->src_addr + addr_len, 0, packet->addr_len );
  132.     }
  133.     if( dest ){
  134.         memcpy(( void * ) packet + packet->dest_addr, dest, addr_len );
  135.         memset(( void * ) packet + packet->dest_addr + addr_len, 0, padding );
  136.     }else{
  137.         memset(( void * ) packet + packet->dest_addr + addr_len, 0, packet->addr_len );
  138.     }
  139.     return EOK;
  140. }
  141.  
  142. int packet_set_mode( packet_t packet, packet_mode_t mode ){
  143.     if( ! packet_is_valid( packet )) return EINVAL;
  144.     packet->mode = mode;
  145.     return EOK;
  146. }
  147.  
  148. int packet_set_owner( packet_t packet, services_t owner ){
  149.     if( ! packet_is_valid( packet )) return EINVAL;
  150.     packet->owner = owner;
  151.     return EOK;
  152. }
  153.  
  154. int packet_translate( int phone, packet_ref packet, packet_id_t packet_id ){
  155.     ERROR_DECLARE;
  156.  
  157.     unsigned int        size;
  158.  
  159.     if( ! packet ) return EINVAL;
  160.     * packet = pm_find( packet_id );
  161.     if( * packet ) return EOK;
  162.     ERROR_PROPAGATE( async_req_1_1( phone, NET_PACKET_GET_SIZE, packet_id, & size ));
  163.     return packet_return( phone, packet, packet_id, size );
  164. }
  165.  
  166. int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size ){
  167.     ERROR_DECLARE;
  168.  
  169.     aid_t       message;
  170.     ipc_call_t  answer;
  171.  
  172.     message = async_send_1( phone, NET_PACKET_GET, packet_id, & answer );
  173.     * packet = ( packet_t ) as_get_mappable_page( size );
  174.     if( ERROR_OCCURED( ipc_share_in_start_0_0( phone, * packet, size ))
  175.     || ERROR_OCCURED( pm_add( * packet ))){
  176.         munmap( * packet, size );
  177.         async_wait_for( message, NULL );
  178.         return ERROR_CODE;
  179.     }
  180.     async_wait_for( message, NULL );
  181.     return EOK;
  182. }
  183.  
  184. packet_t packet_get_5( int phone, services_t owner, size_t max_content, size_t addr_len, size_t max_prefix, size_t max_sufix ){
  185.     ERROR_DECLARE;
  186.  
  187.     packet_id_t packet_id;
  188.     unsigned int size;
  189.     packet_t packet;
  190.  
  191.     if( ERROR_OCCURED( async_req_5_2( phone, NET_PACKET_CREATE_5, owner, max_content, addr_len, max_prefix, max_sufix, & packet_id, & size ))
  192.     || ERROR_OCCURED( packet_return( phone, & packet, packet_id, size ))){
  193.         return NULL;
  194.     }
  195.     return packet;
  196. }
  197.  
  198. packet_t packet_get_1( int phone, services_t owner, size_t content ){
  199.     ERROR_DECLARE;
  200.  
  201.     packet_id_t packet_id;
  202.     unsigned int    size;
  203.     packet_t    packet;
  204.  
  205.     if( ERROR_OCCURED( async_req_2_2( phone, NET_PACKET_CREATE_1, owner, content, & packet_id, & size ))
  206.     || ERROR_OCCURED( packet_return( phone, & packet, packet_id, size ))){
  207.         return NULL;
  208.     }
  209.     return packet;
  210. }
  211.  
  212. void packet_release( int phone, packet_id_t packet_id ){
  213.     async_msg_1( phone, NET_PACKET_RELEASE, packet_id );
  214. }
  215.  
  216. /** @}
  217.  */
  218.