33ed27ae65
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.
105 lines
3.7 KiB
C
105 lines
3.7 KiB
C
/****************************************************************************
|
|
* net/utils/net_tcpchksum.c
|
|
*
|
|
* Copyright (C) 2007-2010, 2012, 2014-2015, 2017 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>
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <nuttx/net/netconfig.h>
|
|
#include <nuttx/net/netdev.h>
|
|
|
|
#include "utils/utils.h"
|
|
|
|
#ifdef CONFIG_NET_TCP
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_chksum, tcp_ipv4_chksum, and tcp_ipv6_chksum
|
|
*
|
|
* Description:
|
|
* Calculate the TCP checksum of the packet in d_buf and d_appdata.
|
|
*
|
|
* The TCP checksum is the Internet checksum of data contents of the
|
|
* TCP segment, and a pseudo-header as defined in RFC793.
|
|
*
|
|
* Note: The d_appdata pointer that points to the packet data may
|
|
* point anywhere in memory, so it is not possible to simply calculate
|
|
* the Internet checksum of the contents of the d_buf buffer.
|
|
*
|
|
* Returned Value:
|
|
* The TCP checksum of the TCP segment in d_buf and pointed to by
|
|
* d_appdata.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef CONFIG_NET_ARCH_CHKSUM
|
|
#ifdef CONFIG_NET_IPv4
|
|
uint16_t tcp_ipv4_chksum(FAR struct net_driver_s *dev)
|
|
{
|
|
return ipv4_upperlayer_chksum(dev, IP_PROTO_TCP);
|
|
}
|
|
#endif /* CONFIG_NET_IPv4 */
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
uint16_t tcp_ipv6_chksum(FAR struct net_driver_s *dev)
|
|
{
|
|
return ipv6_upperlayer_chksum(dev, IP_PROTO_TCP, IPv6_HDRLEN);
|
|
}
|
|
#endif /* CONFIG_NET_IPv6 */
|
|
#endif /* !CONFIG_NET_ARCH_CHKSUM */
|
|
|
|
#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
|
|
uint16_t tcp_chksum(FAR struct net_driver_s *dev)
|
|
{
|
|
if (IFF_IS_IPv6(dev->d_flags))
|
|
{
|
|
return tcp_ipv6_chksum(dev);
|
|
}
|
|
else
|
|
{
|
|
return tcp_ipv4_chksum(dev);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#endif /* CONFIG_NET_TCP */
|