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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. #ifndef __NET_PACKET_H__
  37. #define __NET_PACKET_H__
  38.  
  39. #define PACKET_PREPEND( packet, type )      ( type * ) packet_prepend(( packet ), sizeof( type ))
  40. #define PACKET_APPEND( packet, type )       ( type * ) packet_append(( packet ), sizeof( type ))
  41. #define PACKET_TRIM( packet, prefix, sufix )    packet_trim(( packet ), sizeof( prefix ), sizeof( sufix ))
  42.  
  43. typedef struct packet * packet_t;
  44. typedef packet_t *  packet_ref;
  45.  
  46. packet_t    packet_create( size_t max_prefix, size_t max_content, size_t max_sufix );
  47. void *      packet_prepend( packet_t packet, size_t length );
  48. void *      packet_append( packet_t packet, size_t length );
  49. packet_t    packet_copy( packet_t packet );
  50. int     packet_copy_data( packet_t packet, void * data, size_t length );
  51. // TODO protocol identification?
  52. int     packet_send( packet_t packet, int phone );
  53. int     packet_receive( packet_ref packet );
  54. int     packet_trim( packet_t packet, size_t prefix, size_t sufix );
  55. int     packet_destroy( packet_t packet );
  56. size_t      packet_get_data_length( packet_t packet );
  57. void *      packet_get_data( packet_t packet );
  58.  
  59. #endif
  60.  
  61. /** @}
  62.  */
  63.