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61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/**HEADER********************************************************************
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*
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* Copyright (c) 2011 Freescale Semiconductor;
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* All Rights Reserved
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*
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***************************************************************************
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*
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* THIS SOFTWARE IS PROVIDED BY FREESCALE "AS IS" AND ANY EXPRESSED 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 FREESCALE OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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**************************************************************************
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*
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* $FileName: checksum6.c$
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* $Version : 3.8.1.0$
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* $Date : Jun-14-2012$
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*
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* Comments:
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*
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* This file contains the implementation for a one's
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* complement checksum (IPv6 version).
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*
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*END************************************************************************/
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#include <rtcs.h>
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#if RTCSCFG_ENABLE_IP6
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#include "rtcs_prv.h"
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#include "tcpip.h"
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#include "ip_prv.h"
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/************************************************************************
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* NAME: IP6_Sum_pseudo
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*
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* DESCRIPTION: Returns a one's complement checksum of the IP pseudo header
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*
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* Note: This function returns 0 iff all summands are 0..
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*************************************************************************/
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uint_16 IP6_Sum_pseudo( uint_16 sum /* [IN] initial sum */, RTCSPCB_PTR pcb /* [IN] the PCB */)
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{
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IP6_HEADER_PTR iphead = (IP6_HEADER_PTR)RTCSPCB_DATA_NETWORK(pcb);
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uint_16 protocol;
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protocol = RTCSPCB_TRANSPORT_PROTL(pcb);
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sum = _mem_sum_ip(sum, 32, iphead->SOURCE); /* source and dest */
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sum = IP_Sum_immediate(sum, protocol); /* protocol */
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return sum;
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}
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#endif /* RTCSCFG_ENABLE_IP6 */
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