查询IP所在区段
1
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
}
148
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