ln.skyscanner/crawl/CrawledHost.cs

// /**
//  * File: CrawledHost.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.Collections.Generic;
using System.Linq;
using ln.types.net;

namespace ln.skyscanner.crawl
{
    public class CrawledHost
    {
        public readonly Guid ID = Guid.NewGuid();

        public String Name { get; set; }
        public IPv4 PrimaryIP { get; set; }

        public String[] HWAddresses = new string[0];
        public String PrimaryHWAddr => HWAddresses.Where((hwa) => hwa != null && !String.Empty.Equals(hwa)).FirstOrDefault();

        public IPv4[] IPAddresses { get; set; } = new IPv4[0];
        public Network4[] Networks { get; set; } = new Network4[0];

        Dictionary<string, object> hints = new Dictionary<string, object>();

        public DateTime FirstSeen { get; set; }
        public DateTime LastSeen { get; set; }
        public DateTime LastCheck { get; set; }
        public DateTime NextCheck { get; set; }
        public TimeSpan LastCheckTime { get; set; }

        public bool SnmpDetected => GetHint<int>("snmp.version", -1) != -1;
        public bool SSHDetected => GetHint<int>("ssh.port", -1) != -1;
        public bool RFC1213Detected => GetHint<bool>("rfc1213", false);

        public CrawledHost()
        {
            Name = "noname";
            PrimaryIP = IPv4.ANY;
        }

        public bool HasIP(IPv4 ip)
        {
            foreach (IPv4 _ip in IPAddresses)
                if (_ip.Equals(ip))
                    return true;
            return false;
        }

        public KeyValuePair<string, object>[] Hints
        {
            get => hints.ToArray();
            private set
            {
                hints = new Dictionary<string, object>();
                foreach (KeyValuePair<string, object> kv in value)
                    hints.Add(kv.Key, kv.Value);
            }
        }

        public void SetHint(string name,object value)
        {
            hints[name] = value;
        }
        public object GetHint(String name)
        {
            return hints[name];
        }
        public T GetHint<T>(string name)
        {
            return (T)GetHint(name);
        }

        public object GetHint(string name,object def)
        {
            if (HasHint(name))
                return hints[name];

            return def;
        }
        public T GetHint<T>(string name,T def)
        {
            if (HasHint(name))
                return (T)hints[name];

            return def;
        }

        public bool HasHint(string name)
        {
            return hints.ContainsKey(name) && (hints[name] != null);
        }

        public override string ToString()
        {
            return String.Format("[CrawledHost PrimaryIP={0} Name={1}]",PrimaryIP,Name);
        }

        public override int GetHashCode()
        {
            return ID.GetHashCode();
        }
        public override bool Equals(object obj)
        {
            if (obj is CrawledHost)
            {
                CrawledHost you = obj as CrawledHost;
                return ID.Equals(you.ID);
            }
            return false;
        }
    }
}