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5d15d97418
Refactor netlib_check_ipconnectivity() to use gateway/router ping instead of DNS server ping for network connectivity checks. Add IPv6 support. Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
425 lines
11 KiB
C
425 lines
11 KiB
C
/****************************************************************************
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* apps/netutils/netlib/netlib_checkipconnectivity.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <sys/socket.h>
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#include <sys/ioctl.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <nuttx/debug.h>
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#include <ifaddrs.h>
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#include <arpa/inet.h>
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#include <nuttx/net/ip.h>
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#include "netutils/netlib.h"
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#include "netutils/icmp_ping.h"
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#include "netutils/icmpv6_ping.h"
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/****************************************************************************
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* Private Data
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****************************************************************************/
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#define PING_IPADDR_DATALEN 56
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#ifdef CONFIG_NETUTILS_PING
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ping_ipaddr_callback
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*
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* Description:
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* ping ipaddr callback
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*
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* Parameters:
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* result The result of ping
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*
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****************************************************************************/
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static void ping_ipaddr_callback(FAR const struct ping_result_s *result)
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{
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FAR int *count = result->info->priv;
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if (result->code == ICMP_I_FINISH)
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{
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*count = result->nreplies;
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}
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}
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#endif /* CONFIG_NETUTILS_PING */
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#ifdef CONFIG_NETUTILS_PING6
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/****************************************************************************
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* Name: ping6_ipaddr_callback
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*
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* Description:
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* ping6 ipaddr callback
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*
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* Parameters:
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* result The result of ping6
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*
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****************************************************************************/
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static void ping6_ipaddr_callback(FAR const struct ping6_result_s *result)
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{
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FAR int *count = result->info->priv;
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if (result->code == ICMPv6_I_FINISH)
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{
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*count = result->nreplies;
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}
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}
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#endif /* CONFIG_NETUTILS_PING6 */
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/****************************************************************************
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* Name: ping_gateway
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*
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* Description:
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* Ping the default gateway of each network interface (IPv4 and IPv6).
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*
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* Parameters:
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* info Pointer to the IPv4 ping info structure
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* info6 Pointer to the IPv6 ping info structure
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*
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****************************************************************************/
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#ifdef CONFIG_NETDEV_IFINDEX
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static void ping_gateway(FAR struct ping_info_s *info,
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FAR struct ping6_info_s *info6)
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{
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FAR int *replies = info->priv;
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FAR struct ifaddrs *ifap;
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FAR struct ifaddrs *ifa;
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if (getifaddrs(&ifap) < 0)
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{
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return;
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}
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for (ifa = ifap; ifa != NULL && *replies == 0; ifa = ifa->ifa_next)
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{
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if (ifa->ifa_addr == NULL)
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{
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continue;
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}
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/* Skip interfaces that are not up and running */
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if ((ifa->ifa_flags & (IFF_UP | IFF_RUNNING)) !=
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(IFF_UP | IFF_RUNNING) || (ifa->ifa_flags & IFF_LOOPBACK) != 0)
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{
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continue;
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}
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if (ifa->ifa_addr->sa_family == AF_INET)
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{
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FAR struct sockaddr_in *sin;
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char destip[INET_ADDRSTRLEN];
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/* Skip interfaces with INADDR_ANY address and loopback flag */
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sin = (FAR struct sockaddr_in *)ifa->ifa_addr;
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if (sin->sin_addr.s_addr == INADDR_ANY)
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{
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continue;
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}
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/* No ARP means point-to-point or tunnel, treat as reachable */
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if ((ifa->ifa_flags & IFF_NOARP) != 0)
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{
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(*replies)++;
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break;
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}
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sin = (FAR struct sockaddr_in *)ifa->ifa_dstaddr;
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if (sin == NULL ||
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sin->sin_family != AF_INET ||
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sin->sin_addr.s_addr == INADDR_ANY)
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{
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continue;
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}
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inet_ntop(AF_INET, &sin->sin_addr, destip, sizeof(destip));
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ninfo("ping gateway %s on %s\n", destip, ifa->ifa_name);
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info->hostname = destip;
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#ifdef CONFIG_NETUTILS_PING
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icmp_ping(info);
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#else
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(*replies)++;
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#endif
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}
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else if (ifa->ifa_addr->sa_family == AF_INET6)
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{
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FAR struct sockaddr_in6 *sin6;
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char destip[INET6_ADDRSTRLEN];
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/* Skip interfaces with unspecified address and loopback flag */
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sin6 = (FAR struct sockaddr_in6 *)ifa->ifa_addr;
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if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
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{
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continue;
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}
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/* No ARP means point-to-point or tunnel, treat as reachable */
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if ((ifa->ifa_flags & IFF_NOARP) != 0)
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{
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(*replies)++;
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break;
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}
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sin6 = (FAR struct sockaddr_in6 *)ifa->ifa_dstaddr;
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if (sin6 == NULL ||
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sin6->sin6_family != AF_INET6 ||
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IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
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{
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continue;
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}
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inet_ntop(AF_INET6, &sin6->sin6_addr, destip, sizeof(destip));
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ninfo("ping6 gateway %s on %s\n", destip, ifa->ifa_name);
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info6->hostname = destip;
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#ifdef CONFIG_NETUTILS_PING6
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icmp6_ping(info6);
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#else
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(*replies)++;
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#endif
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}
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}
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freeifaddrs(ifap);
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}
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#endif /* CONFIG_NETDEV_IFINDEX */
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/****************************************************************************
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* Name: ping_route
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*
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* Description:
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* Ping the router addresses from the IPv4 routing table.
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*
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* Parameters:
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* info Pointer to the ping info structure
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*
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****************************************************************************/
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#if defined(HAVE_ROUTE_PROCFS) && defined(CONFIG_NETUTILS_PING)
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static void ping_route(FAR struct ping_info_s *info)
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{
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FAR int *replies = info->priv;
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FAR FILE *stream;
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struct netlib_ipv4_route_s route;
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stream = netlib_open_ipv4route();
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if (stream == NULL)
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{
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return;
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}
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while (*replies == 0 && netlib_read_ipv4route(stream, &route) > 0)
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{
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char destip[INET_ADDRSTRLEN];
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if (route.router == INADDR_ANY)
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{
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continue;
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}
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inet_ntop(AF_INET, &route.router, destip, sizeof(destip));
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ninfo("ping route gateway %s\n", destip);
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info->hostname = destip;
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icmp_ping(info);
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}
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netlib_close_ipv4route(stream);
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}
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#endif /* HAVE_ROUTE_PROCFS && CONFIG_NETUTILS_PING */
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/****************************************************************************
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* Name: ping6_route
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*
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* Description:
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* Ping the router addresses from the IPv6 routing table.
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*
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* Parameters:
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* info6 Pointer to the ping6 info structure
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*
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****************************************************************************/
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#if defined(HAVE_ROUTE_PROCFS) && defined(CONFIG_NETUTILS_PING6)
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static void ping6_route(FAR struct ping6_info_s *info6)
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{
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FAR int *replies = info6->priv;
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FAR FILE *stream;
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struct netlib_ipv6_route_s route;
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stream = netlib_open_ipv6route();
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if (stream == NULL)
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{
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return;
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}
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while (*replies == 0 && netlib_read_ipv6route(stream, &route) > 0)
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{
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char destip[INET6_ADDRSTRLEN];
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struct in6_addr router;
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memcpy(&router, route.router, sizeof(router));
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if (IN6_IS_ADDR_UNSPECIFIED(&router))
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{
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continue;
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}
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inet_ntop(AF_INET6, &router, destip, sizeof(destip));
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ninfo("ping6 route gateway %s\n", destip);
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info6->hostname = destip;
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icmp6_ping(info6);
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}
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netlib_close_ipv6route(stream);
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}
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#endif /* HAVE_ROUTE_PROCFS && CONFIG_NETUTILS_PING6 */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: netlib_check_ipconnectivity
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*
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* Description:
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* Check network connectivity by pinging a remote IP address.
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* If ip is NULL, ping the gateway of each network interface,
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* and optionally the routers from the routing table. If ping
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* is disabled, just check the status of the IP network card.
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*
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* Parameters:
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* ip The ipv4 address to check, or NULL to ping gateways
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* timeout The max timeout of each ping
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* retry The retry times of ping
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*
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* Return:
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* nums of remote reply of ping; a negative or ZERO on failure
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*
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****************************************************************************/
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int netlib_check_ipconnectivity(FAR const char *ip, int timeout, int retry)
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{
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int replies = 0;
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#if defined(CONFIG_NETDEV_IFINDEX) || defined(CONFIG_NETUTILS_PING)
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struct ping_info_s info;
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#endif
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#if defined(CONFIG_NETDEV_IFINDEX) || defined(CONFIG_NETUTILS_PING6)
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struct ping6_info_s info6;
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#endif
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#ifdef CONFIG_NETUTILS_PING
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info.count = retry;
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info.datalen = PING_IPADDR_DATALEN;
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info.delay = 0;
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info.timeout = timeout;
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info.callback = ping_ipaddr_callback;
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info.hostname = ip;
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# ifdef CONFIG_NET_BINDTODEVICE
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info.devname = NULL;
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# endif
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#endif
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#if defined(CONFIG_NETDEV_IFINDEX) || defined(CONFIG_NETUTILS_PING)
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info.priv = &replies;
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#endif
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#ifdef CONFIG_NETUTILS_PING6
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info6.count = retry;
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info6.datalen = PING_IPADDR_DATALEN;
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info6.delay = 0;
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info6.timeout = timeout;
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info6.hostname = ip;
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info6.callback = ping6_ipaddr_callback;
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# ifdef CONFIG_NET_BINDTODEVICE
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info6.devname = NULL;
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# endif
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#endif
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#if defined(CONFIG_NETDEV_IFINDEX) || defined(CONFIG_NETUTILS_PING6)
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info6.priv = &replies;
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#endif
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if (ip != NULL)
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{
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struct in6_addr addr6;
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ninfo("ping ipaddr test %s\n", ip);
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if (inet_pton(AF_INET6, ip, &addr6) == 1)
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{
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#ifdef CONFIG_NETUTILS_PING6
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icmp6_ping(&info6);
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return replies;
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#else
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/* Fallback to network card status check */
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#endif
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}
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else
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{
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#ifdef CONFIG_NETUTILS_PING
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icmp_ping(&info);
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return replies;
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#else
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/* Fallback to network card status check */
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#endif
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}
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}
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#ifdef CONFIG_NETDEV_IFINDEX
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ping_gateway(&info, &info6);
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#endif
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#if defined(HAVE_ROUTE_PROCFS) && defined(CONFIG_NETUTILS_PING)
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if (replies == 0)
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{
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ping_route(&info);
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}
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#endif
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#if defined(HAVE_ROUTE_PROCFS) && defined(CONFIG_NETUTILS_PING6)
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if (replies == 0)
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{
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ping6_route(&info6);
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}
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#endif
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#if !defined(CONFIG_NETDEV_IFINDEX) && !defined(HAVE_ROUTE_PROCFS)
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replies = 1;
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#endif
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return replies;
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}
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