IP段查询管理-优快云博客

本文链接：https://blog.youkuaiyun.com/hebiaccpguo/article/details/6104617

using System;
2using System.Collections.Generic;
3using System.Text;
4using System.Net;
5
6namespace IPUtility
7{
8    class Program
9    {
10        static void Main(string[] args)
11        {
12            IPRangeManage irm = new IPRangeManage();
13            irm.Add(new IPRange("石家庄", "219.148.24.0", "219.148.63.255"));
14            irm.Add(new IPRange("石家庄", "222.222.0.0", "222.222.63.255"));
15            irm.Add(new IPRange("唐山", "219.148.64.0", "219.148.79.255"));
16            irm.Add(new IPRange("保定", "219.148.20.0", "219.148.23.255"));
17
18            Console.WriteLine(irm.Search("219.148.56.3").Name);
19
20            Console.ReadLine();
21
22        }
23
24
25    }
26
27    public class IPRange
28    {
29        private string _Name = string.Empty;
30
31        private ulong _BeginIP = 0;
32
33        private ulong _EndIP = Int32.MaxValue;
34
35        /**//**//** <summary>
36        /// IP段名称
37        /// </summary>
38        public string Name
39        {
40            get { return _Name; }
41            set { _Name = value; }
42        }
43
44        /**//**//** <summary>
45        /// 开始IP
46        /// </summary>
47        public ulong BeginIP
48        {
49            get { return _BeginIP; }
50            set { _BeginIP = value; }
51        }
52
53        /**//**//** <summary>
54        /// 结束IP
55        /// </summary>
56        public ulong EndIP
57        {
58            get { return _EndIP; }
59            set { _EndIP = value; }
60        }
61
62
63        /**//**//** <summary>
64        /// 此IP段的范围
65        /// </summary>
66        public ulong Range
67        {
68            get
69            {
70                return EndIP - BeginIP;
71            }
72        }
73
74        public IPRange(string name, string ipBegin, string ipEnd)
75        {
76            this.Name = name;
77            this.BeginIP = IP2A(ipBegin);
78            this.EndIP = IP2A(ipEnd);
79        }
80
81
82        public static ulong IP2A(string ip)
83        {
84            byte[] bytes = IPAddress.Parse(ip).GetAddressBytes();
85            ulong ret = 0;
86
87            foreach (byte b in bytes)
88            {
89                ret <<= 8;
90                ret |= b;
91            }
92
93            return ret;
94
95        }
96
97
98        public static int Compare(IPRange x, IPRange y)
99        {
100            if(x.Range == y.Range)
101                return 0;
102            else if(x.Range > y.Range)
103                return 1;
104            else return -1;
105        }
106
107    }
108
109    public class IPRangeManage
110    {
111        public IPRangeManage()
112        { }
113
114        private List< IPRange> _IPRangeList = new List< IPRange>();
115        private bool _NeedSort = true;
116
117        public void Add(IPRange ipRange)
118        {
119            _IPRangeList.Add(ipRange);
120            _NeedSort = true;
121        }
122
123        private void Sort()
124        {
125            if (_NeedSort)
126            {
127                _IPRangeList.Sort(new Comparison<IPRange>(IPRange.Compare));
128            }
129        }
130
131        public IPRange Search(string ipString)
132        {
133            ulong ip = IPRange.IP2A(ipString);
134
135            this.Sort();
136
137            foreach (IPRange ir in _IPRangeList)
138            {
139                if (ir.BeginIP <= ip && ir.EndIP >= ip)
140                {
141                    return ir;
142                }
143            }
144            return null;
145        }
146    }
147}