148 lines
5.3 KiB
C
148 lines
5.3 KiB
C
/****************************************************************************
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* net/icmpv6/icmpv6_send.c
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*
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* Copyright (C) 2015 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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#if defined(CONFIG_NET) && defined(CONFIG_NET_ICMPv6) && defined(CONFIG_NET_ICMPv6_PING)
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#include <debug.h>
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#include <arpa/inet.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/netstats.h>
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#include <nuttx/net/ip.h>
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#include "devif/devif.h"
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#include "utils/utils.h"
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#include "icmpv6/icmpv6.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define ICMPv6BUF ((struct icmpv6_iphdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: icmpv6_send
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*
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* Description:
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* Setup to send an ICMPv6 packet
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*
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* Parameters:
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* dev - The device driver structure to use in the send operation
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*
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* Return:
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* None
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*
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* Assumptions:
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* Called from the interrupt level or with interrupts disabled.
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*
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****************************************************************************/
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void icmpv6_send(FAR struct net_driver_s *dev, FAR net_ipv6addr_t *destaddr)
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{
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FAR struct icmpv6_iphdr_s *picmpv6 = ICMPv6BUF;
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if (dev->d_sndlen > 0)
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{
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/* The total length to send is the size of the application data plus
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* the IP and ICMPv6 headers (and, eventually, the Ethernet header)
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*/
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dev->d_len = dev->d_sndlen + IPICMPv6_HDRLEN;
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/* The total size of the data (for ICMPv6 checksum calculation) includes
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* the size of the ICMPv6 header
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*/
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dev->d_sndlen += ICMPv6_HDRLEN;
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/* Initialize the IP header. Note that for IPv6, the IP length field
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* does not include the IPv6 IP header length.
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*/
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picmpv6->vtc = 0x60;
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picmpv6->tcf = 0x00;
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picmpv6->flow = 0x00;
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picmpv6->len[0] = (dev->d_sndlen >> 8);
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picmpv6->len[1] = (dev->d_sndlen & 0xff);
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picmpv6->nexthdr = IP_PROTO_ICMPv6;
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picmpv6->hoplimit = IP_TTL;
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net_ipv6addr_copy(picmpv6->srcipaddr, &dev->d_ipaddr);
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net_ipv6addr_copy(picmpv6->destipaddr, destaddr);
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/* Calculate the ICMPv6 checksum. */
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picmpv6->icmpv6chksum = 0;
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picmpv6->icmpv6chksum = ~(icmpv6_chksum(dev, dev->d_sndlen));
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if (picmpv6->icmpv6chksum == 0)
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{
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picmpv6->icmpv6chksum = 0xffff;
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}
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nllvdbg("Outgoing ICMPv6 packet length: %d (%d)\n",
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dev->d_len, (picmpv6->len[0] << 8) | picmpv6->len[1]);
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#ifdef CONFIG_NET_STATISTICS
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g_netstats.icmpv6.sent++;
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g_netstats.ip.sent++;
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#endif
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}
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}
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#endif /* CONFIG_NET && CONFIG_NET_ICMPv6 && CONFIG_NET_ICMPv6_PING */
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