fergalmoran/DnsServer
1
0
Fork 0
mirror of https://github.com/fergalmoran/DnsServer.git synced 2026-01-07 17:24:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

Lease: added parsing and helper methods.

Browse Source
This commit is contained in:
Shreyas Zare
2019-06-15 13:24:18 +05:30
parent e88bb8d251
commit 36da0c8cb8
1 changed files with 79 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

80
DnsServerCore/Dhcp/Lease.cs
View File

@@ -19,7 +19,11 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
using DnsServerCore.Dhcp.Options;
using System;
using System.Globalization;
using System.IO;
using System.Net;
using TechnitiumLibrary.IO;
using TechnitiumLibrary.Net;
namespace DnsServerCore.Dhcp
{
@@ -28,7 +32,7 @@ namespace DnsServerCore.Dhcp
#region variables
readonly ClientIdentifierOption _clientIdentifier;
readonly string _hostName;
string _hostName;
readonly byte[] _hardwareAddress;
readonly IPAddress _address;
DateTime _leaseObtained;
@@ -52,6 +56,53 @@ namespace DnsServerCore.Dhcp
: this(new ClientIdentifierOption(1, hardwareAddress), null, hardwareAddress, address, leaseTime)
{ }
internal Lease(string hardwareAddress, IPAddress address)
: this(ParseHardwareAddress(hardwareAddress), address, 0)
{ }
internal Lease(BinaryReader bR)
{
switch (bR.ReadByte())
{
case 1:
_clientIdentifier = DhcpOption.Parse(bR.BaseStream) as ClientIdentifierOption;
_clientIdentifier.ParseOptionValue();
_hostName = bR.ReadShortString();
if (_hostName == "")
_hostName = null;
_hardwareAddress = bR.ReadBuffer();
_address = IPAddressExtension.Parse(bR);
_leaseObtained = bR.ReadDate();
_leaseExpires = bR.ReadDate();
break;
default:
throw new InvalidDataException("Lease data format version not supported.");
}
}
#endregion
#region private
private static byte[] ParseHardwareAddress(string hardwareAddress)
{
string[] parts = hardwareAddress.Split('-');
byte[] address = new byte[parts.Length];
for (int i = 0; i < parts.Length; i++)
address[i] = byte.Parse(parts[i], NumberStyles.HexNumber, CultureInfo.InvariantCulture);
return address;
}
internal void SetHostName(string hostName)
{
_hostName = hostName;
}
#endregion
#region public
@@ -62,6 +113,33 @@ namespace DnsServerCore.Dhcp
_leaseExpires = DateTime.UtcNow.AddSeconds(leaseTime);
}
public void WriteTo(BinaryWriter bW)
{
bW.Write((byte)1); //version
_clientIdentifier.WriteTo(bW.BaseStream);
if (string.IsNullOrEmpty(_hostName))
bW.Write((byte)0);
else
bW.WriteShortString(_hostName);
bW.WriteBuffer(_hardwareAddress);
_address.WriteTo(bW);
bW.Write(_leaseObtained);
bW.Write(_leaseExpires);
}
public string GetClientFullIdentifier()
{
string hardwareAddress = BitConverter.ToString(_hardwareAddress);
if (string.IsNullOrEmpty(_hostName))
return "[" + hardwareAddress + "]";
return _hostName + " [" + hardwareAddress + "]";
}
#endregion
#region properties