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.
201 lines
6.7 KiB
C
201 lines
6.7 KiB
C
/****************************************************************************
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* net/icmpv6/icmpv6_rsolicit.c
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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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* 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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#include <stdint.h>
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#include <string.h>
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#include <debug.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/netstats.h>
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#include "devif/devif.h"
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#include "netdev/netdev.h"
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#include "inet/inet.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_AUTOCONF
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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 ICMPv6RSOLICIT \
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((struct icmpv6_router_solicit_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_rsolicit
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*
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* Description:
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* Set up to send an ICMPv6 Router Solicitation message. This version
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* is for a standalone solicitation. If formats:
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*
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* - The Ethernet header
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* - The IPv6 header
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* - The ICMPv6 Router Solicitation Message
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*
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* The device IP address should have been set to the link local address
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* prior to calling this function.
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*
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* Input Parameters:
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* dev - Reference to an Ethernet device driver structure
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void icmpv6_rsolicit(FAR struct net_driver_s *dev)
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{
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FAR struct ipv6_hdr_s *ipv6;
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FAR struct icmpv6_router_solicit_s *sol;
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FAR struct eth_hdr_s *eth;
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uint16_t lladdrsize;
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uint16_t l3size;
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/* Set up the IPv6 header (most is probably already in place) */
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ipv6 = IPv6BUF;
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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_ROUTER_SOLICIT_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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/* Set the multicast destination IP address to the IPv6 all link-
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* local routers address: ff02::2
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*/
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net_ipv6addr_copy(ipv6->destipaddr, g_ipv6_allrouters);
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/* Add our link local IPv6 address as the source address */
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net_ipv6addr_copy(ipv6->srcipaddr, dev->d_ipv6addr);
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/* Set up the ICMPv6 Router Solicitation message */
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sol = ICMPv6RSOLICIT;
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sol->type = ICMPV6_ROUTER_SOLICIT; /* Message type */
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sol->code = 0; /* Message qualifier */
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sol->flags[0] = 0; /* flags */
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sol->flags[1] = 0;
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sol->flags[2] = 0;
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sol->flags[3] = 0;
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/* Set up the options */
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sol->opttype = ICMPv6_OPT_SRCLLADDR; /* Option type */
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sol->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(sol->srclladdr, &dev->d_mac, lladdrsize);
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/* Calculate the checksum over both the ICMP header and payload */
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sol->chksum = 0;
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sol->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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if (dev->d_lltype == NET_LL_ETHERNET)
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{
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/* Set the destination IPv6 all-routers multicast Ethernet
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* address
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*/
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eth = ETHBUF;
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memcpy(eth->dest, g_ipv6_ethallrouters.ether_addr_octet, ETHER_ADDR_LEN);
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/* Move our source Ethernet addresses into the Ethernet header */
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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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#if 0
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/* No additional neighbor lookup is required on this packet.
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* REVISIT: It is inappropriate to set this bit if we get here
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* via neighbor_out(); It is no necessary to set this bit if we
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* get here via icmpv6_input(). Is it ever necessary?
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*/
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IFF_SET_NOARP(dev->d_flags);
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#endif
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}
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#endif
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/* Add the size of the layer layer header to the total size of the
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* outgoing packet.
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*/
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dev->d_len += netdev_ipv6_hdrlen(dev);
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ninfo("Outgoing ICMPv6 Router Solicitation 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_AUTOCONF */
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