95 lines
3.6 KiB
C
95 lines
3.6 KiB
C
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/****************************************************************************
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* net/utils/net_icmpchksum.c
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*
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* Copyright (C) 2007-2010, 2012, 2014-2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#ifdef CONFIG_NET
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#include <stdint.h>
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#include <debug.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/icmp.h>
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#include "utils/utils.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define ICMPBUF ((struct icmp_iphdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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#define ICMPv6BUF ((struct icmp_ipv6hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: icmp_chksum
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*
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* Description:
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* Calculate the checksum of the ICMP message
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*
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****************************************************************************/
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#if defined(CONFIG_NET_ICMP) && defined(CONFIG_NET_ICMP_PING)
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uint16_t icmp_chksum(FAR struct net_driver_s *dev, int len)
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{
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FAR struct icmp_iphdr_s *icmp = ICMPBUF;
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return net_chksum((FAR uint16_t *)&icmp->type, len);
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}
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#endif /* CONFIG_NET_ICMP && CONFIG_NET_ICMP_PING */
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/****************************************************************************
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* Name: icmpv6_chksum
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*
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* Description:
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* Calculate the checksum of the ICMPv6 message
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*
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****************************************************************************/
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#ifdef CONFIG_NET_ICMPv6
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uint16_t icmpv6_chksum(FAR struct net_driver_s *dev)
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{
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return ipv6_upperlayer_chksum(dev, IP_PROTO_ICMP6);
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}
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#endif
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#endif /* CONFIG_NET */
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