71 lines
2.8 KiB
C#
71 lines
2.8 KiB
C#
/*
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*
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* (c) Copyright Ascensio System Limited 2010-2018
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*
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* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
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* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
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* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
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*
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* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
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*
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* You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*
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* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
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* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
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*
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* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
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* relevant author attributions when distributing the software. If the display of the logo in its graphic
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* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
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* in every copy of the program you distribute.
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* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
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*
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*/
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using System.Net;
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using System.Net.Sockets;
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namespace ASC.IPSecurity
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{
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class IPAddressRange
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{
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private readonly AddressFamily addressFamily;
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private readonly byte[] lowerBytes;
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private readonly byte[] upperBytes;
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public IPAddressRange(IPAddress lower, IPAddress upper)
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{
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addressFamily = lower.AddressFamily;
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lowerBytes = lower.GetAddressBytes();
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upperBytes = upper.GetAddressBytes();
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}
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public bool IsInRange(IPAddress address)
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{
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if (address.AddressFamily != addressFamily)
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{
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return false;
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}
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var addressBytes = address.GetAddressBytes();
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bool lowerBoundary = true, upperBoundary = true;
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for (var i = 0; i < lowerBytes.Length &&
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(lowerBoundary || upperBoundary); i++)
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{
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if ((lowerBoundary && addressBytes[i] < lowerBytes[i]) || (upperBoundary && addressBytes[i] > upperBytes[i]))
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{
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return false;
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}
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lowerBoundary &= (addressBytes[i] == lowerBytes[i]);
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upperBoundary &= (addressBytes[i] == upperBytes[i]);
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}
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return true;
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}
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}
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} |