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4707 mejdrech 1
/*
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 * Copyright (c) 2009 Lukas Mejdrech
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup icmp
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 *  @{
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 */
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/** @file
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 *  ICMP client interface implementation.
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 *  @see icmp_client.h
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 */
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#include <errno.h>
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//#include <stdio.h>
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#include <sys/types.h>
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#include "../../include/icmp_codes.h"
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#include "../../include/icmp_client.h"
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#include "../../structures/packet/packet.h"
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#include "../../structures/packet/packet_client.h"
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#include "icmp_header.h"
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int icmp_client_process_packet( packet_t packet, icmp_type_t * type, icmp_code_t * code, icmp_param_t * pointer, icmp_param_t * mtu ){
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    icmp_header_ref header;
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    header = ( icmp_header_ref ) packet_get_data( packet );
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    if(( ! header )
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    || ( packet_get_data_length( packet ) < sizeof( icmp_header_t ))){
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        return 0;
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    }
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    if( type ) * type = header->type;
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    if( code ) * code = header->code;
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    if( pointer ) * pointer = header->un.param.pointer;
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    if( mtu ) * mtu = header->un.frag.mtu;
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    // remove debug dump
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//  printf( "ICMP error %d (%d) in packet %d\n", header->type, header->code, packet_get_id( packet ));
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    return sizeof( icmp_header_t );
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}
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size_t icmp_client_header_length( packet_t packet ){
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    if( packet_get_data_length( packet ) < sizeof( icmp_header_t )){
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        return 0;
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    }
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    return sizeof( icmp_header_t );
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}
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/** @}
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 */