wasSharpNET – Blame information for rev 11
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5 | office | 1 | /////////////////////////////////////////////////////////////////////////// |
2 | // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 // |
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3 | // Please see: http://www.gnu.org/licenses/gpl.html for legal details, // |
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4 | // rights of fair usage, the disclaimer and warranty conditions. // |
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5 | /////////////////////////////////////////////////////////////////////////// |
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6 | |||
7 | using System; |
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8 | using System.Net; |
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9 | |||
10 | namespace wasSharpNET.Network |
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11 | { |
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12 | /// <summary> |
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13 | /// IPAddress extensions. |
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14 | /// </summary> |
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15 | /// <remarks>https://blogs.msdn.microsoft.com/knom/2008/12/31/ip-address-calculations-with-c-subnetmasks-networks/</remarks> |
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16 | public static class IPAddressExtensions |
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17 | { |
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18 | public static IPAddress GetBroadcastAddress(this IPAddress address, IPAddress subnetMask) |
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19 | { |
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20 | var ipAdressBytes = address.GetAddressBytes(); |
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21 | var subnetMaskBytes = subnetMask.GetAddressBytes(); |
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22 | |||
23 | if (ipAdressBytes.Length != subnetMaskBytes.Length) |
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24 | throw new ArgumentException("Lengths of IP address and subnet mask do not match."); |
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25 | |||
26 | var broadcastAddress = new byte[ipAdressBytes.Length]; |
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27 | for (var i = 0; i < broadcastAddress.Length; i++) |
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28 | { |
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11 | office | 29 | broadcastAddress[i] = (byte)(ipAdressBytes[i] | (subnetMaskBytes[i] ^ 255)); |
5 | office | 30 | } |
31 | return new IPAddress(broadcastAddress); |
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32 | } |
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33 | |||
34 | public static IPAddress GetNetworkAddress(this IPAddress address, IPAddress subnetMask) |
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35 | { |
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36 | var ipAdressBytes = address.GetAddressBytes(); |
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37 | var subnetMaskBytes = subnetMask.GetAddressBytes(); |
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38 | |||
39 | if (ipAdressBytes.Length != subnetMaskBytes.Length) |
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40 | throw new ArgumentException("Lengths of IP address and subnet mask do not match."); |
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41 | |||
42 | var broadcastAddress = new byte[ipAdressBytes.Length]; |
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43 | for (var i = 0; i < broadcastAddress.Length; i++) |
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44 | { |
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11 | office | 45 | broadcastAddress[i] = (byte)(ipAdressBytes[i] & subnetMaskBytes[i]); |
5 | office | 46 | } |
47 | return new IPAddress(broadcastAddress); |
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48 | } |
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49 | |||
50 | public static bool IsInSameSubnet(this IPAddress address2, IPAddress address, IPAddress subnetMask) |
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51 | { |
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52 | var network1 = address.GetNetworkAddress(subnetMask); |
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53 | var network2 = address2.GetNetworkAddress(subnetMask); |
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54 | |||
55 | return network1.Equals(network2); |
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56 | } |
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57 | } |
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11 | office | 58 | } |