2015-01-14 23:10:38 +01:00
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/****************************************************************************
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* net/icmpv6/icmpv6_ping.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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2015-02-02 17:49:50 +01:00
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#ifdef CONFIG_NET_ICMPv6_PING
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2015-01-14 23:10:38 +01:00
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdbool.h>
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2015-01-23 21:06:08 +01:00
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#include <string.h>
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2015-01-14 23:10:38 +01:00
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#include <semaphore.h>
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#include <debug.h>
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#include <net/if.h>
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#include <nuttx/clock.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/ip.h>
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#include <nuttx/net/icmpv6.h>
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2015-01-23 21:06:08 +01:00
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#include <nuttx/net/netstats.h>
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2015-01-14 23:10:38 +01:00
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#include "netdev/netdev.h"
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#include "devif/devif.h"
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2015-01-23 21:06:08 +01:00
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#include "utils/utils.h"
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2015-01-14 23:10:38 +01:00
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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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2015-01-23 21:06:08 +01:00
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#define ETHBUF ((struct eth_hdr_s *)&dev->d_buf[0])
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2015-01-14 23:10:38 +01:00
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#define ICMPv6BUF ((struct icmpv6_iphdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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2015-01-23 21:06:08 +01:00
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#define ICMPv6ECHOREQ \
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((struct icmpv6_echo_request_s *)&dev->d_buf[NET_LL_HDRLEN(dev) + IPv6_HDRLEN])
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#define ICMPv6ECHOREPLY \
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((struct icmpv6_echo_reply_s *)&dev->d_buf[NET_LL_HDRLEN(dev) + IPv6_HDRLEN])
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2015-01-14 23:10:38 +01:00
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2015-01-23 21:06:08 +01:00
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/****************************************************************************
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* Private Data
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****************************************************************************/
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2015-01-14 23:10:38 +01:00
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct icmpv6_ping_s
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{
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FAR struct devif_callback_s *png_cb; /* Reference to callback instance */
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2015-01-15 19:19:44 +01:00
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sem_t png_sem; /* Use to manage the wait for the response */
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2016-01-21 18:54:26 +01:00
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systime_t png_time; /* Start time for determining timeouts */
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systime_t png_ticks; /* System clock ticks to wait */
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2015-01-15 19:19:44 +01:00
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int png_result; /* 0: success; <0:negated errno on fail */
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net_ipv6addr_t png_addr; /* The peer to be ping'ed */
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uint16_t png_id; /* Used to match requests with replies */
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2015-05-27 20:49:39 +02:00
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uint16_t png_seqno; /* IN: seqno to send; OUT: seqno received */
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2015-01-15 19:19:44 +01:00
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uint16_t png_datlen; /* The length of data to send in the ECHO request */
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bool png_sent; /* true... the PING request has been sent */
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2015-01-14 23:10:38 +01:00
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};
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/****************************************************************************
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2015-10-03 00:30:35 +02:00
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* Public Data
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2015-01-14 23:10:38 +01:00
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****************************************************************************/
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/****************************************************************************
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2016-02-22 01:08:58 +01:00
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* Private Data
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2015-01-14 23:10:38 +01:00
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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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* Function: ping_timeout
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*
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* Description:
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* Check for send timeout.
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*
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* Parameters:
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* pstate - Ping state structure
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*
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* Returned Value:
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* TRUE:timeout FALSE:no timeout
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*
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* Assumptions:
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* Running at the interrupt level
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*
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****************************************************************************/
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static inline int ping_timeout(FAR struct icmpv6_ping_s *pstate)
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{
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2016-01-21 18:54:26 +01:00
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systime_t elapsed = clock_systimer() - pstate->png_time;
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2015-01-14 23:10:38 +01:00
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if (elapsed >= pstate->png_ticks)
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{
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return TRUE;
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}
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return FALSE;
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}
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2015-01-23 21:06:08 +01:00
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/****************************************************************************
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* Name: icmpv6_echo_request
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*
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* Description:
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* Format an ICMPv6 Echo Request 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 Echo Request Message
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*
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* Parameters:
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* dev - Reference to an Ethernet device driver structure
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* pstate - Ping state structure
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*
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* Return:
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* None
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*
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****************************************************************************/
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static void icmpv6_echo_request(FAR struct net_driver_s *dev,
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FAR struct icmpv6_ping_s *pstate)
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{
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FAR struct icmpv6_iphdr_s *icmp;
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FAR struct icmpv6_echo_request_s *req;
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uint16_t reqlen;
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int i;
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nllvdbg("Send ECHO request: seqno=%d\n", pstate->png_seqno);
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/* Set up the IPv6 header (most is probably already in place) */
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icmp = ICMPv6BUF;
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icmp->vtc = 0x60; /* Version/traffic class (MS) */
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icmp->tcf = 0; /* Traffic class (LS)/Flow label (MS) */
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icmp->flow = 0; /* Flow label (LS) */
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/* Length excludes the IPv6 header */
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reqlen = SIZEOF_ICMPV6_ECHO_REQUEST_S(pstate->png_datlen);
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icmp->len[0] = (reqlen >> 8);
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icmp->len[1] = (reqlen & 0xff);
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icmp->proto = IP_PROTO_ICMP6; /* Next header */
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2015-01-23 21:40:09 +01:00
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icmp->ttl = IP_TTL; /* Hop limit */
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2015-01-23 21:06:08 +01:00
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/* Set the multicast destination IP address */
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net_ipv6addr_copy(icmp->destipaddr, pstate->png_addr);
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/* Add out IPv6 address as the source address */
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net_ipv6addr_copy(icmp->srcipaddr, dev->d_ipv6addr);
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/* Set up the ICMPv6 Echo Request message */
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req = ICMPv6ECHOREQ;
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req->type = ICMPv6_ECHO_REQUEST; /* Message type */
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req->code = 0; /* Message qualifier */
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req->id = htons(pstate->png_id);
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req->seqno = htons(pstate->png_seqno);
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/* Add some easily verifiable data */
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for (i = 0; i < pstate->png_datlen; i++)
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{
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req->data[i] = i;
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}
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/* Calculate the checksum over both the ICMP header and payload */
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icmp->chksum = 0;
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icmp->chksum = ~icmpv6_chksum(dev);
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/* Set the size to the size of the IPv6 header and the payload size */
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IFF_SET_IPv6(dev->d_flags);
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dev->d_sndlen = reqlen;
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dev->d_len = reqlen + IPv6_HDRLEN;
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nllvdbg("Outgoing ICMPv6 Echo Request length: %d (%d)\n",
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dev->d_len, (icmp->len[0] << 8) | icmp->len[1]);
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#ifdef CONFIG_NET_STATISTICS
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g_netstats.icmpv6.sent++;
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2015-01-24 15:26:12 +01:00
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g_netstats.ipv6.sent++;
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2015-01-23 21:06:08 +01:00
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#endif
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}
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2015-01-14 23:10:38 +01:00
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/****************************************************************************
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* Function: ping_interrupt
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*
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* Description:
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* This function is called from the interrupt level to perform the actual
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* ECHO request and/or ECHO reply actions when polled by the lower, device
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* interfacing layer.
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*
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* Parameters:
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* dev The structure of the network driver that caused the interrupt
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* conn The received packet, cast to void *
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* pvpriv An instance of struct icmpv6_ping_s cast to void*
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* flags Set of events describing why the callback was invoked
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*
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* Returned Value:
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* Modified value of the input flags
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*
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* Assumptions:
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* Running at the interrupt level
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*
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****************************************************************************/
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static uint16_t ping_interrupt(FAR struct net_driver_s *dev, FAR void *conn,
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FAR void *pvpriv, uint16_t flags)
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{
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FAR struct icmpv6_ping_s *pstate = (struct icmpv6_ping_s *)pvpriv;
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nllvdbg("flags: %04x\n", flags);
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2015-01-23 21:40:09 +01:00
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2015-01-14 23:10:38 +01:00
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if (pstate)
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{
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2015-05-27 19:39:44 +02:00
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/* Check if the network is still up */
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if ((flags & NETDEV_DOWN) != 0)
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{
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nlldbg("ERROR: Interface is down\n");
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pstate->png_result = -ENETUNREACH;
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goto end_wait;
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}
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2015-01-14 23:10:38 +01:00
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/* Check if this is a ICMPv6 ECHO reply. If so, return the sequence
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* number to the caller. NOTE: We may not even have sent the
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* requested ECHO request; this could have been the delayed ECHO
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* response from a previous ping.
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*/
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2015-05-27 19:39:44 +02:00
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else if ((flags & ICMPv6_ECHOREPLY) != 0 && conn != NULL)
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2015-01-14 23:10:38 +01:00
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{
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2015-01-23 21:06:08 +01:00
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FAR struct icmpv6_echo_reply_s *reply = ICMPv6ECHOREPLY;
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2015-01-14 23:10:38 +01:00
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2015-01-21 21:23:50 +01:00
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nllvdbg("ECHO reply: id=%d seqno=%d\n",
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2015-01-29 19:31:29 +01:00
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ntohs(reply->id), ntohs(reply->seqno));
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2015-01-14 23:10:38 +01:00
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2015-01-23 21:06:08 +01:00
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if (ntohs(reply->id) == pstate->png_id)
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2015-01-14 23:10:38 +01:00
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{
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/* Consume the ECHOREPLY */
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flags &= ~ICMPv6_ECHOREPLY;
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dev->d_len = 0;
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/* Return the result to the caller */
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pstate->png_result = OK;
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2015-01-23 21:06:08 +01:00
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pstate->png_seqno = ntohs(reply->seqno);
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2015-01-14 23:10:38 +01:00
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goto end_wait;
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}
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}
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/* Check:
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* If the outgoing packet is available (it may have been claimed
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* by a sendto interrupt serving a different thread)
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* -OR-
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* If the output buffer currently contains unprocessed incoming
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* data.
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* -OR-
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* If we have already sent the ECHO request
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*
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* In the first two cases, we will just have to wait for the next
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* polling cycle.
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*/
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if (dev->d_sndlen <= 0 && /* Packet available */
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(flags & ICMPv6_NEWDATA) == 0 && /* No incoming data */
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!pstate->png_sent) /* Request not sent */
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{
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2015-01-23 21:06:08 +01:00
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/* Send the ECHO request now. */
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2015-01-14 23:10:38 +01:00
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2015-01-23 21:06:08 +01:00
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icmpv6_echo_request(dev, pstate);
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2015-01-14 23:10:38 +01:00
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pstate->png_sent = true;
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return flags;
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}
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/* Check if the selected timeout has elapsed */
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if (ping_timeout(pstate))
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{
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int failcode;
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/* Check if this device is on the same network as the destination
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* device.
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*/
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2015-01-23 21:06:08 +01:00
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if (!net_ipv6addr_maskcmp(pstate->png_addr, dev->d_ipv6addr,
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dev->d_ipv6netmask))
|
2015-01-14 23:10:38 +01:00
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{
|
2015-02-06 15:11:09 +01:00
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/* Destination address was not on the local network served by
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* this device. If a timeout occurs, then the most likely
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* reason is that the destination address is not reachable.
|
2015-01-14 23:10:38 +01:00
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*/
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nlldbg("Not reachable\n");
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failcode = -ENETUNREACH;
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|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
nlldbg("Ping timeout\n");
|
|
|
|
failcode = -ETIMEDOUT;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Report the failure */
|
|
|
|
|
|
|
|
pstate->png_result = failcode;
|
|
|
|
goto end_wait;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Continue waiting */
|
|
|
|
}
|
|
|
|
|
|
|
|
return flags;
|
|
|
|
|
|
|
|
end_wait:
|
|
|
|
nllvdbg("Resuming\n");
|
|
|
|
|
|
|
|
/* Do not allow any further callbacks */
|
|
|
|
|
|
|
|
pstate->png_cb->flags = 0;
|
|
|
|
pstate->png_cb->priv = NULL;
|
|
|
|
pstate->png_cb->event = NULL;
|
|
|
|
|
|
|
|
/* Wake up the waiting thread */
|
|
|
|
|
|
|
|
sem_post(&pstate->png_sem);
|
|
|
|
return flags;
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Public Functions
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
/****************************************************************************
|
2015-01-19 22:51:40 +01:00
|
|
|
* Name: imcpv6_ping
|
2015-01-14 23:10:38 +01:00
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Send a ECHO request and wait for the ECHO response
|
|
|
|
*
|
|
|
|
* Parameters:
|
|
|
|
* addr - The IP address of the peer to send the ICMPv6 ECHO request to
|
|
|
|
* in network order.
|
|
|
|
* id - The ID to use in the ICMPv6 ECHO request. This number should be
|
|
|
|
* unique; only ECHO responses with this matching ID will be
|
|
|
|
* processed (host order)
|
|
|
|
* seqno - The sequence number used in the ICMPv6 ECHO request. NOT used
|
|
|
|
* to match responses (host order)
|
|
|
|
* dsecs - Wait up to this many deci-seconds for the ECHO response to be
|
|
|
|
* returned (host order).
|
|
|
|
*
|
|
|
|
* Return:
|
|
|
|
* seqno of received ICMPv6 ECHO with matching ID (may be different
|
|
|
|
* from the seqno argument (may be a delayed response from an earlier
|
|
|
|
* ping with the same ID). Or a negated errno on any failure.
|
|
|
|
*
|
|
|
|
* Assumptions:
|
|
|
|
* Called from the user level with interrupts enabled.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2015-01-15 19:19:44 +01:00
|
|
|
int icmpv6_ping(net_ipv6addr_t addr, uint16_t id, uint16_t seqno,
|
2015-01-14 23:10:38 +01:00
|
|
|
uint16_t datalen, int dsecs)
|
|
|
|
{
|
2015-05-27 19:39:44 +02:00
|
|
|
FAR struct net_driver_s *dev;
|
2015-01-14 23:10:38 +01:00
|
|
|
struct icmpv6_ping_s state;
|
|
|
|
net_lock_t save;
|
2015-01-23 21:06:08 +01:00
|
|
|
|
2015-02-02 20:44:31 +01:00
|
|
|
#ifdef CONFIG_NET_ICMPv6_NEIGHBOR
|
2015-01-14 23:10:38 +01:00
|
|
|
int ret;
|
|
|
|
|
2015-01-23 21:06:08 +01:00
|
|
|
/* Make sure that the IP address mapping is in the Neighbor Table */
|
2015-01-14 23:10:38 +01:00
|
|
|
|
2015-02-02 20:44:31 +01:00
|
|
|
ret = icmpv6_neighbor(addr);
|
2015-01-14 23:10:38 +01:00
|
|
|
if (ret < 0)
|
|
|
|
{
|
|
|
|
ndbg("ERROR: Not reachable\n");
|
|
|
|
return -ENETUNREACH;
|
|
|
|
}
|
2015-02-02 20:44:31 +01:00
|
|
|
#endif /* CONFIG_NET_ICMPv6_NEIGHBOR */
|
2015-01-14 23:10:38 +01:00
|
|
|
|
2015-05-27 19:39:44 +02:00
|
|
|
/* Get the device that will be used to route this ICMP ECHO request */
|
|
|
|
|
|
|
|
#ifdef CONFIG_NETDEV_MULTINIC
|
|
|
|
dev = netdev_findby_ipv6addr(g_ipv6_allzeroaddr, addr);
|
|
|
|
#else
|
|
|
|
dev = netdev_findby_ipv6addr(addr);
|
|
|
|
#endif
|
|
|
|
if (dev == 0)
|
|
|
|
{
|
|
|
|
ndbg("ERROR: Not reachable\n");
|
|
|
|
return -ENETUNREACH;
|
|
|
|
}
|
|
|
|
|
2015-01-14 23:10:38 +01:00
|
|
|
/* Initialize the state structure */
|
|
|
|
|
|
|
|
sem_init(&state.png_sem, 0, 0);
|
2015-01-23 21:06:08 +01:00
|
|
|
state.png_ticks = DSEC2TICK(dsecs); /* System ticks to wait */
|
|
|
|
state.png_result = -ENOMEM; /* Assume allocation failure */
|
|
|
|
state.png_id = id; /* The ID to use in the ECHO request */
|
|
|
|
state.png_seqno = seqno; /* The seqno to use in the ECHO request */
|
|
|
|
state.png_datlen = datalen; /* The length of data to send in the ECHO request */
|
|
|
|
state.png_sent = false; /* ECHO request not yet sent */
|
|
|
|
|
|
|
|
net_ipv6addr_copy(state.png_addr, addr); /* Address of the peer to be ping'ed */
|
2015-01-14 23:10:38 +01:00
|
|
|
|
|
|
|
save = net_lock();
|
|
|
|
state.png_time = clock_systimer();
|
|
|
|
|
|
|
|
/* Set up the callback */
|
|
|
|
|
2015-05-27 19:39:44 +02:00
|
|
|
state.png_cb = icmpv6_callback_alloc(dev);
|
2015-01-14 23:10:38 +01:00
|
|
|
if (state.png_cb)
|
|
|
|
{
|
|
|
|
state.png_cb->flags = (ICMPv6_POLL | ICMPv6_ECHOREPLY);
|
2015-10-08 23:10:04 +02:00
|
|
|
state.png_cb->priv = (FAR void *)&state;
|
2015-01-14 23:10:38 +01:00
|
|
|
state.png_cb->event = ping_interrupt;
|
|
|
|
state.png_result = -EINTR; /* Assume sem-wait interrupted by signal */
|
|
|
|
|
|
|
|
/* Notify the device driver of the availability of TX data */
|
|
|
|
|
2015-05-27 19:39:44 +02:00
|
|
|
netdev_txnotify_dev(dev);
|
2015-01-14 23:10:38 +01:00
|
|
|
|
|
|
|
/* Wait for either the full round trip transfer to complete or
|
|
|
|
* for timeout to occur. (1) net_lockedwait will also terminate if a
|
|
|
|
* signal is received, (2) interrupts may be disabled! They will
|
|
|
|
* be re-enabled while the task sleeps and automatically
|
|
|
|
* re-enabled when the task restarts.
|
|
|
|
*/
|
|
|
|
|
2015-01-21 21:23:50 +01:00
|
|
|
nllvdbg("Start time: 0x%08x seqno: %d\n", state.png_time, seqno);
|
2015-01-14 23:10:38 +01:00
|
|
|
net_lockedwait(&state.png_sem);
|
|
|
|
|
2015-05-27 19:39:44 +02:00
|
|
|
icmpv6_callback_free(dev, state.png_cb);
|
2015-01-14 23:10:38 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
net_unlock(save);
|
|
|
|
|
|
|
|
/* Return the negated error number in the event of a failure, or the
|
|
|
|
* sequence number of the ECHO reply on success.
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (!state.png_result)
|
|
|
|
{
|
2015-01-21 21:23:50 +01:00
|
|
|
nllvdbg("Return seqno=%d\n", state.png_seqno);
|
2015-01-14 23:10:38 +01:00
|
|
|
return (int)state.png_seqno;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
nlldbg("Return error=%d\n", -state.png_result);
|
|
|
|
return state.png_result;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-02-02 17:49:50 +01:00
|
|
|
#endif /* CONFIG_NET_ICMPv6_PING */
|