ln.skyscanner/crawl/service/ICMP.cs

// /**
//  * File: ICMP.cs
//  * Author: haraldwolff
//  *
//  * This file and it's content is copyrighted by the Author and / or copyright holder.
//  * Any use wihtout proper permission is illegal and may lead to legal actions.
//  *
//  *
//  **/
using System;
using System.Net.NetworkInformation;
using ln.skyscanner.crawl.service;
namespace ln.skyscanner.crawl.tests
{
    public class ICMP : CrawlService
    {
        public static Ping Ping { get; private set; } = new Ping();

        public ICMP()
            :base("ping")
        {}

        public override bool Check(Crawl crawl)
        {
                int nSuccess = 0;
                long roundTripTime = 0;

                for (int n = 0; n < 10; n++)
                {
                    //HostCrawl.setState("ICMP check [{0}/10]", n);

                    PingReply pingReply = Ping.Send(crawl.Host.PrimaryIP, 500);
                    if (pingReply.Status == IPStatus.Success)
                    {
                        nSuccess++;
                        roundTripTime += pingReply.RoundtripTime;
                    }
                    else if ((n > 3) && (nSuccess == 0))
                    {
                        break;
                    }
                }

                if (nSuccess > 0)
                {
                    roundTripTime /= nSuccess;

                    crawl.Host.SetHint("ping.success", true);
                    crawl.Host.SetHint("ping.rta", (int)roundTripTime);
                    crawl.Host.SetHint("ping.out_of_ten", nSuccess);

                    crawl.Host.LastSeen = DateTime.Now;
                    if (crawl.Host.FirstSeen < new DateTime(1970, 1, 2))
                        crawl.Host.FirstSeen = DateTime.Now;
                }
                else
                {
                    crawl.Host.SetHint("ping.success", false);
                    crawl.Host.SetHint("ping.rta", null);
                    crawl.Host.SetHint("ping.out_of_ten", 0);
                }
            return true;
        }

        public override bool HostProvidesOption(Crawl crawl, params object[] parameters)
        {
            return crawl.Host.GetHint("ping.success", false);
        }
    }
}