GitHub/netch
1
0
Fork 0
mirror of https://github.com/netchx/netch.git synced 2026-03-28 18:59:46 +08:00
Code Issues Packages Projects Releases Wiki Activity

done

Browse Source
This commit is contained in:
Connection Refused
2019-12-02 19:51:12 +08:00
commit b2ea730984
229 changed files with 86605 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
Netch/3rd/DnsClient.NET/DnsHeaderFlag.cs Normal file
View File

@@ -0,0 +1,48 @@
using System;
namespace DnsClient.Protocol
{
/* Reference: https://tools.ietf.org/html/rfc6895#section-2
* Response header fields
*
1 1 1 1 1 1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ID |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
==> |QR| OpCode |AA|TC|RD|RA| Z|AD|CD| RCODE | <==
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| QDCOUNT/ZOCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ANCOUNT/PRCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| NSCOUNT/UPCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ARCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* */
/// <summary>
/// The flags of the header's second 16bit value
/// </summary>
[Flags]
internal enum DnsHeaderFlag : ushort
{
IsCheckingDisabled = 0x0010,
IsAuthenticData = 0x0020,
FutureUse = 0x0040, // Z bit seems to be ignored now, see https://tools.ietf.org/html/rfc6895#section-2.1
RecursionAvailable = 0x0080,
RecursionDesired = 0x0100,
ResultTruncated = 0x0200,
HasAuthorityAnswer = 0x0400,
HasQuery = 0x8000,
}
internal static class DnsHeader
{
public static readonly ushort OPCodeMask = 0x7800;
public static readonly ushort OPCodeShift = 11;
public static readonly ushort RCodeMask = 0x000F;
}
}