141 lines
4.4 KiB
C
141 lines
4.4 KiB
C
/****************************************************************************
|
|
* net/icmpv6/icmpv6_solicit.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/net/net.h>
|
|
#include <nuttx/net/netdev.h>
|
|
#include <nuttx/net/netstats.h>
|
|
|
|
#include "devif/devif.h"
|
|
#include "netdev/netdev.h"
|
|
#include "utils/utils.h"
|
|
#include "icmpv6/icmpv6.h"
|
|
#include "inet/inet.h"
|
|
|
|
#ifdef CONFIG_NET_ICMPv6
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/* First 6 hwords of the multi-cast address in network byte order */
|
|
|
|
static const uint16_t g_icmpv_mcastaddr[6] =
|
|
{
|
|
HTONS(0xff02), HTONS(0x0000), HTONS(0x0000), HTONS(0x0000),
|
|
HTONS(0x0000), HTONS(0x0001)
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_solicit
|
|
*
|
|
* Description:
|
|
* Set up to send an ICMPv6 Neighbor Solicitation message. This version
|
|
* is for a standalone solicitation. If formats:
|
|
*
|
|
* - The IPv6 header
|
|
* - The ICMPv6 Neighbor Solicitation Message
|
|
*
|
|
* Input Parameters:
|
|
* dev - Reference to a device driver structure
|
|
* ipaddr - IP address of Neighbor to be solicited
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void icmpv6_solicit(FAR struct net_driver_s *dev,
|
|
FAR const net_ipv6addr_t ipaddr)
|
|
{
|
|
FAR struct icmpv6_neighbor_solicit_s *sol;
|
|
net_ipv6addr_t dstaddr;
|
|
uint16_t lladdrsize;
|
|
uint16_t l3size;
|
|
|
|
/* Length excludes the IPv6 header */
|
|
|
|
lladdrsize = netdev_lladdrsize(dev);
|
|
l3size = SIZEOF_ICMPV6_NEIGHBOR_SOLICIT_S(lladdrsize);
|
|
|
|
/* Set the multicast destination IP address */
|
|
|
|
memcpy(dstaddr, g_icmpv_mcastaddr, sizeof(g_icmpv_mcastaddr));
|
|
dstaddr[6] = ipaddr[6] | HTONS(0xff00);
|
|
dstaddr[7] = ipaddr[7];
|
|
|
|
ipv6_build_header(IPv6BUF, l3size, IP_PROTO_ICMP6,
|
|
dev->d_ipv6addr, dstaddr, 255);
|
|
|
|
/* Set up the ICMPv6 Neighbor Solicitation message */
|
|
|
|
sol = IPBUF(IPv6_HDRLEN);
|
|
sol->type = ICMPv6_NEIGHBOR_SOLICIT; /* Message type */
|
|
sol->code = 0; /* Message qualifier */
|
|
sol->flags[0] = 0; /* flags */
|
|
sol->flags[1] = 0;
|
|
sol->flags[2] = 0;
|
|
sol->flags[3] = 0;
|
|
|
|
/* Copy the target address into the Neighbor Solicitation message */
|
|
|
|
net_ipv6addr_copy(sol->tgtaddr, ipaddr);
|
|
|
|
/* Set up the options */
|
|
|
|
sol->opttype = ICMPv6_OPT_SRCLLADDR; /* Option type */
|
|
sol->optlen = ICMPv6_OPT_OCTECTS(lladdrsize); /* Option length in octets */
|
|
|
|
/* Copy our link layer address into the message */
|
|
|
|
memcpy(sol->srclladdr, &dev->d_mac, lladdrsize);
|
|
|
|
/* Calculate the checksum over both the ICMP header and payload */
|
|
|
|
sol->chksum = 0;
|
|
sol->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 Solicitation length: %d\n", dev->d_len);
|
|
|
|
#ifdef CONFIG_NET_STATISTICS
|
|
g_netstats.icmpv6.sent++;
|
|
g_netstats.ipv6.sent++;
|
|
#endif
|
|
}
|
|
|
|
#endif /* CONFIG_NET_ICMPv6 */
|