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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 icmp
  30.  *  @{
  31.  */
  32.  
  33. /** @file
  34.  *  ICMP client interface implementation.
  35.  *  @see icmp_client.h
  36.  */
  37.  
  38. #include <errno.h>
  39. //#include <stdio.h>
  40.  
  41. #include <sys/types.h>
  42.  
  43. #include "../../include/icmp_codes.h"
  44. #include "../../include/icmp_client.h"
  45.  
  46. #include "../../structures/packet/packet.h"
  47. #include "../../structures/packet/packet_client.h"
  48.  
  49. #include "icmp_header.h"
  50.  
  51. int icmp_client_process_packet( packet_t packet, icmp_type_t * type, icmp_code_t * code, icmp_param_t * pointer, icmp_param_t * mtu ){
  52.     icmp_header_ref header;
  53.  
  54.     header = ( icmp_header_ref ) packet_get_data( packet );
  55.     if(( ! header )
  56.     || ( packet_get_data_length( packet ) < sizeof( icmp_header_t ))){
  57.         return 0;
  58.     }
  59.     if( type ) * type = header->type;
  60.     if( code ) * code = header->code;
  61.     if( pointer ) * pointer = header->un.param.pointer;
  62.     if( mtu ) * mtu = header->un.frag.mtu;
  63.     // remove debug dump
  64. //  printf( "ICMP error %d (%d) in packet %d\n", header->type, header->code, packet_get_id( packet ));
  65.     return sizeof( icmp_header_t );
  66. }
  67.  
  68. size_t icmp_client_header_length( packet_t packet ){
  69.     if( packet_get_data_length( packet ) < sizeof( icmp_header_t )){
  70.         return 0;
  71.     }
  72.     return sizeof( icmp_header_t );
  73. }
  74.  
  75. /** @}
  76.  */
  77.