wasSharpNET – Blame information for rev 11

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