86 lines
3.0 KiB
C
86 lines
3.0 KiB
C
/****************************************************************************
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* net/utils/net_icmpchksum.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <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 IPv4BUF ((FAR struct ipv4_hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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#define ICMPBUF(hl) ((FAR struct icmp_hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev) + (hl)])
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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_SOCKET)
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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 ipv4_hdr_s *ipv4 = IPv4BUF;
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FAR struct icmp_hdr_s *icmp;
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uint16_t iphdrlen;
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/* Get the IP header length (accounting for possible options). */
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iphdrlen = (ipv4->vhl & IPv4_HLMASK) << 2;
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/* The ICMP header immediately follows the IP header */
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icmp = ICMPBUF(iphdrlen);
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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_SOCKET */
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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, unsigned int iplen)
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{
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return ipv6_upperlayer_chksum(dev, IP_PROTO_ICMP6, iplen);
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}
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#endif
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#endif /* CONFIG_NET */
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