public static HostnameMemBlockToString ( MemBlock name ) : String | ||
name | MemBlock | The memblock containing the dns formated hostname. |
return | String |
public void TestHostname() { String hostname = "yo-in-f104.google.com"; MemBlock hostnamem = MemBlock.Reference(new byte[] { 0x0a, 0x79, 0x6f, 0x2d, 0x69, 0x6e, 0x2d, 0x66, 0x31, 0x30, 0x34, 0x06, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x03, 0x63, 0x6f, 0x6d, 0x00 }); Assert.AreEqual(hostname, DnsPacket.HostnameMemBlockToString(hostnamem), "HostnameMemBlockToString"); Assert.AreEqual(hostnamem, DnsPacket.HostnameStringToMemBlock(hostname), "HostnameStringToMemBlock"); Assert.AreEqual(hostname, DnsPacket.HostnameMemBlockToString( DnsPacket.HostnameStringToMemBlock(hostname)), "Hostname String dual"); Assert.AreEqual(hostnamem, DnsPacket.HostnameStringToMemBlock( DnsPacket.HostnameMemBlockToString(hostnamem)), "Hostname MemBlock dual"); }
/** * <summary>Creates a response given the entire packet.</summary> * <remarks>The entire packet must be given, because some name servers take * advantage of pointers to reduce their size.</remarks> * <param name="Data">The entire Dns packet.</param> * <param name="Start">The starting position of the Response.</param> */ public Response(MemBlock Data, int Start) { int idx = 0; NameBlob = DnsPacket.RetrieveBlob(Data, Start, out idx); int type = (Data[idx++] << 8) + Data[idx++]; Type = (DnsPacket.Types)type; CacheFlush = ((Data[idx] & 0x80) == 0x80) ? true : false; int rclass = ((Data[idx++] << 8) & 0x7F) + Data[idx++]; Class = (DnsPacket.Classes)rclass; Ttl = (Data[idx++] << 24); Ttl |= (Data[idx++] << 16); Ttl |= (Data[idx++] << 8); Ttl |= (Data[idx++]); RdLength = (short)((Data[idx++] << 8) + Data[idx++]); RDataBlob = Data.Slice(idx, RdLength); if (Type == DnsPacket.Types.Ptr) { try { Name = DnsPacket.PtrMemBlockToString(NameBlob); } catch { Name = DnsPacket.HostnameMemBlockToString(NameBlob); } int End = 0; RDataBlob = DnsPacket.RetrieveBlob(Data, idx, out End); RData = DnsPacket.HostnameMemBlockToString(RDataBlob); } else if (Type == DnsPacket.Types.A) { Name = DnsPacket.HostnameMemBlockToString(NameBlob); RData = DnsPacket.IPMemBlockToString(RDataBlob); } _icpacket = _packet = Data.Slice(Start, idx + RdLength - Start); }
/** * <summary>Constructor when parsing a Dns Query</summary> * <param name="Data"> must pass in the entire packet from where the question * begins, after parsing, can check Data.Length to find where next * container begins.</param> */ public Question(MemBlock Data, int Start) { int idx = 0; QNameBlob = DnsPacket.RetrieveBlob(Data, Start, out idx); int qtype = (Data[idx++] << 8) + Data[idx++]; QType = (DnsPacket.Types)qtype; int qclass = (Data[idx++] << 8) + Data[idx]; QClass = (DnsPacket.Classes)qclass; if (QType == DnsPacket.Types.A || QType == DnsPacket.Types.AAAA) { QName = DnsPacket.HostnameMemBlockToString(QNameBlob); } else if (QType == DnsPacket.Types.Ptr) { QName = DnsPacket.PtrMemBlockToString(QNameBlob); } _icpacket = _packet = Data.Slice(Start, idx + 1 - Start); }