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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1194 | dev | 1 | using System; |
| 2 | using System.Net; |
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| 3 | using System.Text; |
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| 4 | using System.Text.RegularExpressions; |
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| 5 | |||
| 6 | namespace TCPproxy |
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| 7 | { |
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| 8 | abstract class HostUtils |
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| 9 | { |
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| 10 | public static IPAddress ResendHostToIp(string host) |
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| 11 | { |
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| 12 | IPAddress ip; |
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| 13 | |||
| 14 | if(host == "") |
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| 15 | { |
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| 16 | throw new Exception("Please enter the resend host"); |
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| 17 | } |
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| 18 | |||
| 19 | Regex ipRegex = new Regex(@"^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$"); |
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| 20 | if(ipRegex.Match(host).Success) |
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| 21 | { |
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| 22 | try |
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| 23 | { |
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| 24 | ip = IPAddress.Parse(host); |
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| 25 | } |
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| 26 | catch(FormatException) |
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| 27 | { |
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| 28 | throw new Exception("Wrong IP address of the resend host"); |
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| 29 | } |
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| 30 | } |
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| 31 | else |
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| 32 | { |
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| 1197 | dev | 33 | IPHostEntry hostInfo = Dns.GetHostByName(host); |
| 1194 | dev | 34 | |
| 35 | if(hostInfo.AddressList.Length > 0) |
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| 36 | { |
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| 37 | ip = hostInfo.AddressList[0]; |
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| 38 | } |
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| 39 | else |
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| 40 | { |
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| 41 | throw new Exception("Cannot find IP address of the resend host"); |
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| 42 | } |
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| 43 | } |
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| 44 | |||
| 45 | return ip; |
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| 46 | } |
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| 47 | } |
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| 48 | } |