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Zone: added GetReverseZone() methods.

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This commit is contained in:
Shreyas Zare
2020-06-13 13:31:57 +05:30
parent 68d52e4f65
commit 866f30047d
1 changed files with 42 additions and 0 deletions
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42
DnsServerCore/Dns/Zones/Zone.cs
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@@ -17,8 +17,12 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using TechnitiumLibrary.Net;
using TechnitiumLibrary.Net.Dns;
namespace DnsServerCore.Dns.Zones
@@ -41,6 +45,44 @@ namespace DnsServerCore.Dns.Zones
#endregion
#region static
public static string GetReverseZone(IPAddress address, IPAddress subnetMask)
{
return GetReverseZone(address, subnetMask.GetSubnetMaskWidth());
}
public static string GetReverseZone(IPAddress address, int subnetMaskWidth)
{
int addressByteCount = Convert.ToInt32(Math.Ceiling(Convert.ToDecimal(subnetMaskWidth) / 8));
byte[] addressBytes = address.GetAddressBytes();
string reverseZone = "";
switch (address.AddressFamily)
{
case AddressFamily.InterNetwork:
for (int i = 0; i < addressByteCount; i++)
reverseZone = addressBytes[i] + "." + reverseZone;
reverseZone += "in-addr.arpa";
break;
case AddressFamily.InterNetworkV6:
for (int i = 0; i < addressByteCount; i++)
reverseZone = (addressBytes[i] & 0x0F).ToString("X") + "." + (addressBytes[i] >> 4).ToString("X") + "." + reverseZone;
reverseZone += "ip6.arpa";
break;
default:
throw new NotSupportedException("AddressFamily not supported.");
}
return reverseZone;
}
#endregion
#region public
public List<DnsResourceRecord> ListAllRecords()