165 lines
5.7 KiB
C
165 lines
5.7 KiB
C
/****************************************************************************
|
|
* net/icmpv6/icmpv6_advertise.c
|
|
* Send an ICMPv6 Neighbor Advertisement
|
|
*
|
|
* Copyright (C) 2015, 2017 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Adapted for NuttX from logic in uIP which also has a BSD-like license:
|
|
*
|
|
* Original author Adam Dunkels <adam@dunkels.com>
|
|
* Copyright () 2001-2003, Adam Dunkels.
|
|
* All rights reserved.
|
|
*
|
|
* 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. The name of the author may not be used to endorse or promote
|
|
* products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <string.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/net/netconfig.h>
|
|
#include <nuttx/net/netstats.h>
|
|
#include <nuttx/net/netdev.h>
|
|
#include <nuttx/net/net.h>
|
|
#include <nuttx/net/icmpv6.h>
|
|
|
|
#include "netdev/netdev.h"
|
|
#include "utils/utils.h"
|
|
#include "icmpv6/icmpv6.h"
|
|
|
|
#ifdef CONFIG_NET_ICMPv6
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#define IPv6BUF ((struct ipv6_hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
|
|
|
|
#define ICMPv6ADVERTISE \
|
|
((struct icmpv6_neighbor_advertise_s *)&dev->d_buf[NET_LL_HDRLEN(dev) + IPv6_HDRLEN])
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_advertise
|
|
*
|
|
* Description:
|
|
* Send an ICMPv6 Neighbor Advertisement
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure containing the outgoing ICMPv6 packet
|
|
* buffer
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* The network is locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
void icmpv6_advertise(FAR struct net_driver_s *dev,
|
|
const net_ipv6addr_t destipaddr)
|
|
{
|
|
FAR struct ipv6_hdr_s *ipv6 = IPv6BUF;
|
|
FAR struct icmpv6_neighbor_advertise_s *adv;
|
|
uint16_t lladdrsize;
|
|
uint16_t l3size;
|
|
|
|
/* Set up the IPv6 header */
|
|
|
|
ipv6->vtc = 0x60; /* Version/traffic class (MS) */
|
|
ipv6->tcf = 0; /* Traffic class (LS)/Flow label (MS) */
|
|
ipv6->flow = 0; /* Flow label (LS) */
|
|
|
|
/* Length excludes the IPv6 header */
|
|
|
|
lladdrsize = netdev_lladdrsize(dev);
|
|
l3size = SIZEOF_ICMPV6_NEIGHBOR_ADVERTISE_S(lladdrsize);
|
|
ipv6->len[0] = (l3size >> 8);
|
|
ipv6->len[1] = (l3size & 0xff);
|
|
|
|
ipv6->proto = IP_PROTO_ICMP6; /* Next header */
|
|
ipv6->ttl = 255; /* Hop limit */
|
|
|
|
/* Swap source for destination IP address, add our source IP address */
|
|
|
|
net_ipv6addr_copy(ipv6->destipaddr, destipaddr);
|
|
net_ipv6addr_copy(ipv6->srcipaddr, dev->d_ipv6addr);
|
|
|
|
/* Set up the ICMPv6 Neighbor Advertise response */
|
|
|
|
adv = ICMPv6ADVERTISE;
|
|
adv->type = ICMPv6_NEIGHBOR_ADVERTISE; /* Message type */
|
|
adv->code = 0; /* Message qualifier */
|
|
adv->flags[0] = ICMPv6_NADV_FLAG_S | ICMPv6_NADV_FLAG_O; /* Solicited+Override flags. */
|
|
adv->flags[1] = 0;
|
|
adv->flags[2] = 0;
|
|
adv->flags[3] = 0;
|
|
|
|
/* Copy the target address into the Neighbor Advertisement message */
|
|
|
|
net_ipv6addr_copy(adv->tgtaddr, dev->d_ipv6addr);
|
|
|
|
/* Set up the options */
|
|
|
|
adv->opttype = ICMPv6_OPT_TGTLLADDR; /* Option type */
|
|
adv->optlen = ICMPv6_OPT_OCTECTS(lladdrsize); /* Option length in octets */
|
|
|
|
/* Copy our link layer address into the message */
|
|
|
|
memcpy(adv->tgtlladdr, &dev->d_mac, lladdrsize);
|
|
|
|
/* Calculate the checksum over both the ICMP header and payload */
|
|
|
|
adv->chksum = 0;
|
|
adv->chksum = ~icmpv6_chksum(dev, IPv6_HDRLEN);
|
|
|
|
/* Set the size to the size of the IPv6 header and the payload size */
|
|
|
|
dev->d_len = IPv6_HDRLEN + l3size;
|
|
|
|
ninfo("Outgoing ICMPv6 Neighbor Advertise length: %d (%d)\n",
|
|
dev->d_len, (ipv6->len[0] << 8) | ipv6->len[1]);
|
|
|
|
#ifdef CONFIG_NET_STATISTICS
|
|
g_netstats.icmpv6.sent++;
|
|
g_netstats.ipv6.sent++;
|
|
#endif
|
|
}
|
|
|
|
#endif /* CONFIG_NET_ICMPv6 */
|