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.
197 lines
6.5 KiB
C
197 lines
6.5 KiB
C
/****************************************************************************
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* net/icmpv6/icmpv6_advertise.c
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* Send an ICMPv6 Neighbor Advertisement
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*
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* Copyright (C) 2015, 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Adapted for NuttX from logic in uIP which also has a BSD-like license:
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*
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* Original author Adam Dunkels <adam@dunkels.com>
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* Copyright () 2001-2003, Adam Dunkels.
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* All rights reserved.
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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 the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE 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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#include <stdint.h>
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#include <string.h>
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#include <debug.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/netstats.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/icmpv6.h>
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#include <nuttx/net/ethernet.h>
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#include "netdev/netdev.h"
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#include "utils/utils.h"
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#include "icmpv6/icmpv6.h"
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#ifdef CONFIG_NET_ICMPv6
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define ETHBUF ((struct eth_hdr_s *)&dev->d_buf[0])
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#define IPv6BUF ((struct ipv6_hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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#define ICMPv6ADVERTISE \
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((struct icmpv6_neighbor_advertise_s *)&dev->d_buf[NET_LL_HDRLEN(dev) + IPv6_HDRLEN])
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: icmpv6_advertise
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*
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* Description:
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* Send an ICMPv6 Neighbor Advertisement
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*
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* Input Parameters:
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* dev - The device driver structure containing the outgoing ICMPv6 packet
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* buffer
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* The network is locked
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*
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****************************************************************************/
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void icmpv6_advertise(FAR struct net_driver_s *dev,
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const net_ipv6addr_t destipaddr)
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{
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FAR struct ipv6_hdr_s *ipv6 = IPv6BUF;
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FAR struct icmpv6_neighbor_advertise_s *adv;
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uint16_t lladdrsize;
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uint16_t l3size;
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/* Set up the IPv6 header */
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ipv6->vtc = 0x60; /* Version/traffic class (MS) */
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ipv6->tcf = 0; /* Traffic class (LS)/Flow label (MS) */
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ipv6->flow = 0; /* Flow label (LS) */
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/* Length excludes the IPv6 header */
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lladdrsize = netdev_dev_lladdrsize(dev);
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l3size = SIZEOF_ICMPV6_NEIGHBOR_ADVERTISE_S(lladdrsize);
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ipv6->len[0] = (l3size >> 8);
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ipv6->len[1] = (l3size & 0xff);
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ipv6->proto = IP_PROTO_ICMP6; /* Next header */
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ipv6->ttl = 255; /* Hop limit */
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/* Swap source for destination IP address, add our source IP address */
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net_ipv6addr_copy(ipv6->destipaddr, destipaddr);
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net_ipv6addr_copy(ipv6->srcipaddr, dev->d_ipv6addr);
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/* Set up the ICMPv6 Neighbor Advertise response */
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adv = ICMPv6ADVERTISE;
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adv->type = ICMPv6_NEIGHBOR_ADVERTISE; /* Message type */
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adv->code = 0; /* Message qualifier */
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adv->flags[0] = ICMPv6_NADV_FLAG_S | ICMPv6_NADV_FLAG_O; /* Solicited+Override flags. */
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adv->flags[1] = 0;
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adv->flags[2] = 0;
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adv->flags[3] = 0;
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/* Copy the target address into the Neighbor Advertisement message */
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net_ipv6addr_copy(adv->tgtaddr, dev->d_ipv6addr);
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/* Set up the options */
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adv->opttype = ICMPv6_OPT_TGTLLADDR; /* Option type */
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adv->optlen = ICMPv6_OPT_OCTECTS(lladdrsize); /* Option length in octets */
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/* Copy our link layer address into the message
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* REVISIT: What if the link layer is not Ethernet?
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*/
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memcpy(adv->tgtlladdr, &dev->d_mac, lladdrsize);
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/* Calculate the checksum over both the ICMP header and payload */
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adv->chksum = 0;
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adv->chksum = ~icmpv6_chksum(dev, IPv6_HDRLEN);
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/* Set the size to the size of the IPv6 header and the payload size */
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dev->d_len = IPv6_HDRLEN + l3size;
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#ifdef CONFIG_NET_ETHERNET
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/* Add the size of the Ethernet header */
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dev->d_len += ETH_HDRLEN;
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/* Move the source and to the destination addresses in the Ethernet header
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* and use our MAC as the new source address
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*/
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if (dev->d_lltype == NET_LL_ETHERNET)
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{
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FAR struct eth_hdr_s *eth = ETHBUF;
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memcpy(eth->dest, eth->src, ETHER_ADDR_LEN);
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memcpy(eth->src, dev->d_mac.ether.ether_addr_octet, ETHER_ADDR_LEN);
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/* Set the IPv6 Ethernet type */
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eth->type = HTONS(ETHTYPE_IP6);
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}
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#endif
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/* No additional neighbor lookup is required on this packet (We are using
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* a multicast address).
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*/
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IFF_SET_NOARP(dev->d_flags);
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ninfo("Outgoing ICMPv6 Neighbor Advertise length: %d (%d)\n",
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dev->d_len, (ipv6->len[0] << 8) | ipv6->len[1]);
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#ifdef CONFIG_NET_STATISTICS
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g_netstats.icmpv6.sent++;
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g_netstats.ipv6.sent++;
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#endif
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}
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#endif /* CONFIG_NET_ICMPv6 */
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