mirror of
https://github.com/fergalmoran/DnsServer.git
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69 lines
1.6 KiB
C#
69 lines
1.6 KiB
C#
/*
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Technitium DNS Server
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Copyright (C) 2019 Shreyas Zare (shreyas@technitium.com)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System.IO;
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using System.Net;
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using TechnitiumLibrary.IO;
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namespace DnsServerCore.Dhcp
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{
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class SubnetMaskOption : DhcpOption
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{
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#region variables
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readonly IPAddress _subnetMask;
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#endregion
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#region constructor
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public SubnetMaskOption(Stream s)
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: base(DhcpOptionCode.SubnetMask)
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{
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int len = s.ReadByte();
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if (len < 0)
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throw new EndOfStreamException();
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if (len != 4)
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throw new InvalidDataException();
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_subnetMask = new IPAddress(s.ReadBytes(4));
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}
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#endregion
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#region protected
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protected override void WriteOptionTo(Stream s)
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{
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s.WriteByte(4);
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s.Write(_subnetMask.GetAddressBytes());
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}
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#endregion
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#region properties
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public IPAddress SubnetMask
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{ get { return _subnetMask; } }
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#endregion
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}
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}
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