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incubator-nuttx/net/utils/net_icmpchksum.c

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/****************************************************************************
* net/utils/net_icmpchksum.c
*
* Copyright (C) 2007-2010, 2012, 2014-2015 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#ifdef CONFIG_NET
#include <nuttx/net/netdev.h>
#include <nuttx/net/icmp.h>
#include "utils/utils.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
net/: Now handles reception of IPv4 packets with larger IPv4 headers containing options.
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#define IPv4BUF ((FAR struct ipv4_hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
#define ICMPBUF(hl) ((FAR struct icmp_hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev) + (hl)])
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/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: icmp_chksum
*
* Description:
* Calculate the checksum of the ICMP message
*
****************************************************************************/
This change adds support for semi-standard IPPROTO_ICMP AF_INET datagram sockets. This replaces the old ad hoc, nonstandard way of implementing ping with a more standard, socket interface. Squashed commit of the following: net/icmp: Finishes off icmp_recvfrom(). net/icmp: Add readahead support for IPPROTO_ICMP sockets. net/icmp: Add poll() support for IPPROTO_ICMP sockets. net/icmp: Add a connection structure for IPPROTO_ICMP sockets. net/icmp: Implements sendto for the IPPROTO_ICMP socket. net/icmp: Move icmp_sendto() and icmp_recvfrom() to separate files. They are likely to be complex (when they are implemented). net/icmp: Hook IPPROTO_ICMP sockets into network. Fix some naming collisions. Still missing basic ICMP send/receive logic. configs: apps/system/ping current need poll() enabled. configs: All defconfig files that use to enable low-level support must now enabled CONFIG_SYSTEM_PING. net/icmp: Adds basic build framework to support IPPROTO_ICMP sockets.
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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)
{
net/: Now handles reception of IPv4 packets with larger IPv4 headers containing options.
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FAR struct ipv4_hdr_s *ipv4 = IPv4BUF;
FAR struct icmp_hdr_s *icmp;
uint16_t iphdrlen;
/* Get the IP header length (accounting for possible options). */
iphdrlen = (ipv4->vhl & IPv4_HLMASK) << 2;
/* The ICMP header immediately follows the IP header */
icmp = ICMPBUF(iphdrlen);
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return net_chksum((FAR uint16_t *)&icmp->type, len);
}
This change adds support for semi-standard IPPROTO_ICMP AF_INET datagram sockets. This replaces the old ad hoc, nonstandard way of implementing ping with a more standard, socket interface. Squashed commit of the following: net/icmp: Finishes off icmp_recvfrom(). net/icmp: Add readahead support for IPPROTO_ICMP sockets. net/icmp: Add poll() support for IPPROTO_ICMP sockets. net/icmp: Add a connection structure for IPPROTO_ICMP sockets. net/icmp: Implements sendto for the IPPROTO_ICMP socket. net/icmp: Move icmp_sendto() and icmp_recvfrom() to separate files. They are likely to be complex (when they are implemented). net/icmp: Hook IPPROTO_ICMP sockets into network. Fix some naming collisions. Still missing basic ICMP send/receive logic. configs: apps/system/ping current need poll() enabled. configs: All defconfig files that use to enable low-level support must now enabled CONFIG_SYSTEM_PING. net/icmp: Adds basic build framework to support IPPROTO_ICMP sockets.
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#endif /* CONFIG_NET_ICMP && CONFIG_NET_ICMP_SOCKET */
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/****************************************************************************
* Name: icmpv6_chksum
*
* Description:
* Calculate the checksum of the ICMPv6 message
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6
Squashed commit of the following: net/mld: Checksum calculation needs to know the full size of the IPv6 header, including the size of the extension headers. The payload size in the IPv64 header must include the extension headers (not considered part of the header in this case). Fixes a few additional errors in size, endian-ness and checksum calculations. Wireshark now reports the the outgoing Report has a good checksum. net/mld/mld_query.c: Add a cast to assure that the left shift does not overflow.
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uint16_t icmpv6_chksum(FAR struct net_driver_s *dev, unsigned int iplen)
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{
Squashed commit of the following: net/mld: Checksum calculation needs to know the full size of the IPv6 header, including the size of the extension headers. The payload size in the IPv64 header must include the extension headers (not considered part of the header in this case). Fixes a few additional errors in size, endian-ness and checksum calculations. Wireshark now reports the the outgoing Report has a good checksum. net/mld/mld_query.c: Add a cast to assure that the left shift does not overflow.
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return ipv6_upperlayer_chksum(dev, IP_PROTO_ICMP6, iplen);
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}
#endif
#endif /* CONFIG_NET */