internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < ConstantPartLength)
{
return(null);
}
DnsType typeCovered = (DnsType)dns.ReadUShort(offsetInDns + Offset.TypeCovered, Endianity.Big);
DnsAlgorithm algorithm = (DnsAlgorithm)dns[offsetInDns + Offset.Algorithm];
byte labels = dns[offsetInDns + Offset.Labels];
uint originalTtl = dns.ReadUInt(offsetInDns + Offset.OriginalTtl, Endianity.Big);
uint signatureExpiration = dns.ReadUInt(offsetInDns + Offset.SignatureExpiration, Endianity.Big);
uint signatureInception = dns.ReadUInt(offsetInDns + Offset.SignatureInception, Endianity.Big);
ushort keyTag = dns.ReadUShort(offsetInDns + Offset.KeyTag, Endianity.Big);
offsetInDns += ConstantPartLength;
length -= ConstantPartLength;
DnsDomainName signersName;
int signersNameLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out signersName, out signersNameLength))
{
return(null);
}
offsetInDns += signersNameLength;
length -= signersNameLength;
DataSegment signature = dns.Subsegment(offsetInDns, length);
return(new DnsResourceDataSignature(typeCovered, algorithm, labels, originalTtl, signatureExpiration, signatureInception, keyTag, signersName, signature));
}
internal static bool TryRead(out ushort value, out DnsDomainName domainName,
DnsDatagram dns, int offsetInDns, int length)
{
if (length < ConstantPartLength)
{
value = 0;
domainName = null;
return(false);
}
value = dns.ReadUShort(offsetInDns + Offset.Value, Endianity.Big);
length -= ConstantPartLength;
int domainNameLength;
if (!DnsDomainName.TryParse(dns, offsetInDns + Offset.DomainName, length, out domainName, out domainNameLength))
{
return(false);
}
length -= domainNameLength;
if (length != 0)
{
return(false);
}
return(true);
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
DnsDomainName mainNameServer;
int domainNameLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out mainNameServer, out domainNameLength))
{
return(null);
}
offsetInDns += domainNameLength;
length -= domainNameLength;
DnsDomainName responsibleMailbox;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out responsibleMailbox, out domainNameLength))
{
return(null);
}
offsetInDns += domainNameLength;
length -= domainNameLength;
if (length != ConstantPartLength)
{
return(null);
}
uint serial = dns.ReadUInt(offsetInDns + Offset.Serial, Endianity.Big);;
uint refresh = dns.ReadUInt(offsetInDns + Offset.Refresh, Endianity.Big);;
uint retry = dns.ReadUInt(offsetInDns + Offset.Retry, Endianity.Big);;
uint expire = dns.ReadUInt(offsetInDns + Offset.Expire, Endianity.Big);;
uint minimumTtl = dns.ReadUInt(offsetInDns + Offset.MinimumTtl, Endianity.Big);;
return(new DnsResourceDataStartOfAuthority(mainNameServer, responsibleMailbox, serial, refresh, retry, expire, minimumTtl));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < ConstantPartLength)
{
return(null);
}
ushort priortiy = dns.ReadUShort(offsetInDns + Offset.Priority, Endianity.Big);
ushort weight = dns.ReadUShort(offsetInDns + Offset.Weight, Endianity.Big);
ushort port = dns.ReadUShort(offsetInDns + Offset.Port, Endianity.Big);
DnsDomainName target;
int targetLength;
if (!DnsDomainName.TryParse(dns, offsetInDns + Offset.Target, length - ConstantPartLength, out target, out targetLength))
{
return(null);
}
if (ConstantPartLength + targetLength != length)
{
return(null);
}
return(new DnsResourceDataServerSelection(priortiy, weight, port, target));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < 2)
{
return((DnsResourceData)null);
}
DnsDomainName domainName1;
int numBytesRead1;
if (!DnsDomainName.TryParse(dns, offsetInDns, length - 1, out domainName1, out numBytesRead1))
{
return((DnsResourceData)null);
}
offsetInDns += numBytesRead1;
length -= numBytesRead1;
DnsDomainName domainName2;
int numBytesRead2;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName2, out numBytesRead2))
{
return((DnsResourceData)null);
}
if (length != numBytesRead2)
{
return((DnsResourceData)null);
}
return((DnsResourceData) new DnsResourceDataTrustAnchorLink(domainName1, domainName2));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < 18)
{
return((DnsResourceData)null);
}
DnsType typeCovered = (DnsType)dns.ReadUShort(offsetInDns, Endianity.Big);
DnsAlgorithm algorithm = (DnsAlgorithm)dns[offsetInDns + 2];
byte labels = dns[offsetInDns + 3];
uint originalTtl = dns.ReadUInt(offsetInDns + 4, Endianity.Big);
uint num1 = dns.ReadUInt(offsetInDns + 8, Endianity.Big);
uint num2 = dns.ReadUInt(offsetInDns + 12, Endianity.Big);
ushort keyTag = dns.ReadUShort(offsetInDns + 16, Endianity.Big);
offsetInDns += 18;
length -= 18;
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName, out numBytesRead))
{
return((DnsResourceData)null);
}
offsetInDns += numBytesRead;
length -= numBytesRead;
DataSegment signature = dns.Subsegment(offsetInDns, length);
return((DnsResourceData) new DnsResourceDataSignature(typeCovered, algorithm, labels, originalTtl, (SerialNumber32)num1, (SerialNumber32)num2, keyTag, domainName, signature));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
DnsDomainName nextDomainName;
int nextDomainNameLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out nextDomainName, out nextDomainNameLength))
{
return(null);
}
offsetInDns += nextDomainNameLength;
length -= nextDomainNameLength;
if (length > MaxTypeBitmapLength)
{
return(null);
}
DataSegment typeBitmap = dns.Subsegment(offsetInDns, length);
if (length != 0 && typeBitmap.Last == 0)
{
return(null);
}
return(new DnsResourceDataNextDomain(nextDomainName, typeBitmap));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < 2)
{
return((DnsResourceData)null);
}
ushort preference = dns.ReadUShort(offsetInDns, Endianity.Big);
offsetInDns += 2;
length -= 2;
DnsDomainName domainName1;
int numBytesRead1;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName1, out numBytesRead1))
{
return((DnsResourceData)null);
}
offsetInDns += numBytesRead1;
length -= numBytesRead1;
DnsDomainName domainName2;
int numBytesRead2;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName2, out numBytesRead2))
{
return((DnsResourceData)null);
}
length -= numBytesRead2;
if (length != 0)
{
return((DnsResourceData)null);
}
return((DnsResourceData) new DnsResourceDataX400Pointer(preference, domainName1, domainName2));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
DnsDomainName domainName1;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName1, out numBytesRead))
{
return((DnsResourceData)null);
}
offsetInDns += numBytesRead;
length -= numBytesRead;
DnsDomainName domainName2;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName2, out numBytesRead))
{
return((DnsResourceData)null);
}
offsetInDns += numBytesRead;
length -= numBytesRead;
if (length != 20)
{
return((DnsResourceData)null);
}
uint num = dns.ReadUInt(offsetInDns, Endianity.Big);
uint refresh = dns.ReadUInt(offsetInDns + 4, Endianity.Big);
uint retry = dns.ReadUInt(offsetInDns + 8, Endianity.Big);
uint expire = dns.ReadUInt(offsetInDns + 12, Endianity.Big);
uint minimumTtl = dns.ReadUInt(offsetInDns + 16, Endianity.Big);
return((DnsResourceData) new DnsResourceDataStartOfAuthority(domainName1, domainName2, (SerialNumber32)num, refresh, retry, expire, minimumTtl));
}
internal static DnsGateway CreateInstance(DnsGatewayType gatewayType, DnsDatagram dns, int offsetInDns, int length)
{
switch (gatewayType)
{
case DnsGatewayType.None:
return(None);
case DnsGatewayType.IpV4:
if (length < IpV4Address.SizeOf)
{
return(null);
}
return(new DnsGatewayIpV4(dns.ReadIpV4Address(offsetInDns, Endianity.Big)));
case DnsGatewayType.IpV6:
if (length < IpV6Address.SizeOf)
{
return(null);
}
return(new DnsGatewayIpV6(dns.ReadIpV6Address(offsetInDns, Endianity.Big)));
case DnsGatewayType.DomainName:
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName, out numBytesRead))
{
return(null);
}
return(new DnsGatewayDomainName(domainName));
default:
return(null);
}
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < MinimumLength)
{
return(null);
}
DnsDomainName previous;
int previousLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length - DnsDomainName.RootLength, out previous, out previousLength))
{
return(null);
}
offsetInDns += previousLength;
length -= previousLength;
DnsDomainName next;
int nextLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out next, out nextLength))
{
return(null);
}
if (length != nextLength)
{
return(null);
}
return(new DnsResourceDataTrustAnchorLink(previous, next));
}
internal static bool TryParseBase(DnsDatagram dns, int offsetInDns, out DnsDomainName domainName, out DnsType type, out DnsClass dnsClass, out int numBytesRead)
{
type = DnsType.Any;
dnsClass = DnsClass.Any;
if (!DnsDomainName.TryParse(dns, offsetInDns, dns.Length - offsetInDns, out domainName, out numBytesRead) || offsetInDns + numBytesRead + 4 > dns.Length)
{
return(false);
}
type = (DnsType)dns.ReadUShort(offsetInDns + numBytesRead, Endianity.Big);
dnsClass = (DnsClass)dns.ReadUShort(offsetInDns + numBytesRead + 2, Endianity.Big);
numBytesRead += 4;
return(true);
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < MinimumLength)
{
return(null);
}
ushort order = dns.ReadUShort(offsetInDns + Offset.Order, Endianity.Big);
ushort preference = dns.ReadUShort(offsetInDns + Offset.Preference, Endianity.Big);
DataSegment data = dns.Subsegment(offsetInDns + ConstantPartLength, length - ConstantPartLength);
int dataOffset = 0;
DataSegment flags = ReadString(data, ref dataOffset);
if (flags == null || !IsLegalFlags(flags))
{
return(null);
}
DataSegment services = ReadString(data, ref dataOffset);
if (services == null)
{
return(null);
}
DataSegment regexp = ReadString(data, ref dataOffset);
if (regexp == null)
{
return(null);
}
DnsDomainName replacement;
int replacementLength;
if (!DnsDomainName.TryParse(dns, offsetInDns + ConstantPartLength + dataOffset, length - ConstantPartLength - dataOffset,
out replacement, out replacementLength))
{
return(null);
}
if (ConstantPartLength + dataOffset + replacementLength != length)
{
return(null);
}
return(new DnsResourceDataNamingAuthorityPointer(order, preference, flags, services, regexp, replacement));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < ConstantPartLength + DnsDomainName.RootLength)
{
return(null);
}
DnsDomainName algorithm;
int algorithmLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length - ConstantPartLength, out algorithm, out algorithmLength))
{
return(null);
}
offsetInDns += algorithmLength;
length -= algorithmLength;
if (length < ConstantPartLength)
{
return(null);
}
uint inception = dns.ReadUInt(offsetInDns + OffsetAfterAlgorithm.Inception, Endianity.Big);
uint expiration = dns.ReadUInt(offsetInDns + OffsetAfterAlgorithm.Expiration, Endianity.Big);
DnsTransactionKeyMode mode = (DnsTransactionKeyMode)dns.ReadUShort(offsetInDns + OffsetAfterAlgorithm.Mode, Endianity.Big);
DnsResponseCode error = (DnsResponseCode)dns.ReadUShort(offsetInDns + OffsetAfterAlgorithm.Error, Endianity.Big);
int keySize = dns.ReadUShort(offsetInDns + OffsetAfterAlgorithm.KeySize, Endianity.Big);
if (length < ConstantPartLength + keySize)
{
return(null);
}
DataSegment key = dns.Subsegment(offsetInDns + OffsetAfterAlgorithm.KeyData, keySize);
int totalReadAfterAlgorithm = OffsetAfterAlgorithm.KeyData + keySize;
offsetInDns += totalReadAfterAlgorithm;
length -= totalReadAfterAlgorithm;
int otherSize = dns.ReadUShort(offsetInDns, Endianity.Big);
if (length != sizeof(ushort) + otherSize)
{
return(null);
}
DataSegment other = dns.Subsegment(offsetInDns + sizeof(ushort), otherSize);
return(new DnsResourceDataTransactionKey(algorithm, inception, expiration, mode, error, key, other));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < ConstantPartLength + DnsDomainName.RootLength)
{
return(null);
}
DnsDomainName algorithm;
int algorithmLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length - ConstantPartLength, out algorithm, out algorithmLength))
{
return(null);
}
offsetInDns += algorithmLength;
length -= algorithmLength;
if (length < ConstantPartLength)
{
return(null);
}
UInt48 timeSigned = dns.ReadUInt48(offsetInDns + OffsetAfterAlgorithm.TimeSigned, Endianity.Big);
ushort fudge = dns.ReadUShort(offsetInDns + OffsetAfterAlgorithm.Fudge, Endianity.Big);
int messageAuthenticationCodeLength = dns.ReadUShort(offsetInDns + OffsetAfterAlgorithm.MessageAuthenticationCodeSize, Endianity.Big);
if (length < ConstantPartLength + messageAuthenticationCodeLength)
{
return(null);
}
DataSegment messageAuthenticationCode = dns.Subsegment(offsetInDns + OffsetAfterAlgorithm.MessageAuthenticationCode, messageAuthenticationCodeLength);
int totalReadAfterAlgorithm = OffsetAfterAlgorithm.MessageAuthenticationCode + messageAuthenticationCodeLength;
offsetInDns += totalReadAfterAlgorithm;
length -= totalReadAfterAlgorithm;
ushort originalId = dns.ReadUShort(offsetInDns + OffsetAfterMessageAuthenticationCode.OriginalId, Endianity.Big);
DnsResponseCode error = (DnsResponseCode)dns.ReadUShort(offsetInDns + OffsetAfterMessageAuthenticationCode.Error, Endianity.Big);
int otherLength = dns.ReadUShort(offsetInDns + OffsetAfterMessageAuthenticationCode.OtherLength, Endianity.Big);
if (length != OffsetAfterMessageAuthenticationCode.OtherData + otherLength)
{
return(null);
}
DataSegment other = dns.Subsegment(offsetInDns + OffsetAfterMessageAuthenticationCode.OtherData, otherLength);
return(new DnsResourceDataTransactionSignature(algorithm, timeSigned, fudge, messageAuthenticationCode, originalId, error, other));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName, out numBytesRead))
{
return((DnsResourceData)null);
}
length -= numBytesRead;
if (length != 0)
{
return((DnsResourceData)null);
}
return((DnsResourceData) new DnsResourceDataDomainName(domainName));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < MinimumLength)
{
return(null);
}
byte prefixLength = dns[offsetInDns + Offset.PrefixLength];
if (prefixLength > MaxPrefixLength)
{
return(null);
}
offsetInDns += ConstantPartLength;
length -= ConstantPartLength;
int addressSuffixLength = CalculateAddressSuffixLength(prefixLength);
if (length < addressSuffixLength)
{
return(null);
}
IpV6Address addressSuffix = new IpV6Address((UInt128)dns.ReadUnsignedBigInteger(offsetInDns, addressSuffixLength, Endianity.Big));
offsetInDns += addressSuffixLength;
length -= addressSuffixLength;
if (IsAddressSuffixTooSmall(prefixLength, addressSuffix) || IsAddressSuffixTooBig(prefixLength, addressSuffix))
{
return(null);
}
DnsDomainName prefixName;
int prefixNameLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out prefixName, out prefixNameLength))
{
return(null);
}
if (prefixNameLength != length)
{
return(null);
}
return(new DnsResourceDataA6(prefixLength, addressSuffix, prefixName));
}
internal static List <DnsDomainName> ReadDomainNames(DnsDatagram dns, int offsetInDns, int length, int numExpected = 0)
{
List <DnsDomainName> list = new List <DnsDomainName>(numExpected);
while (length != 0)
{
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName, out numBytesRead))
{
return((List <DnsDomainName>)null);
}
offsetInDns += numBytesRead;
length -= numBytesRead;
list.Add(domainName);
}
return(list);
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < 17)
{
return((DnsResourceData)null);
}
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns, length - 16, out domainName, out numBytesRead))
{
return((DnsResourceData)null);
}
offsetInDns += numBytesRead;
length -= numBytesRead;
if (length < 16)
{
return((DnsResourceData)null);
}
UInt48 timeSigned = dns.ReadUInt48(offsetInDns, Endianity.Big);
ushort fudge = dns.ReadUShort(offsetInDns + 6, Endianity.Big);
int length1 = (int)dns.ReadUShort(offsetInDns + 8, Endianity.Big);
if (length < 16 + length1)
{
return((DnsResourceData)null);
}
DataSegment messageAuthenticationCode = dns.Subsegment(offsetInDns + 10, length1);
int num = 10 + length1;
offsetInDns += num;
length -= num;
ushort originalId = dns.ReadUShort(offsetInDns, Endianity.Big);
DnsResponseCode error = (DnsResponseCode)dns.ReadUShort(offsetInDns + 2, Endianity.Big);
int length2 = (int)dns.ReadUShort(offsetInDns + 4, Endianity.Big);
if (length != 6 + length2)
{
return((DnsResourceData)null);
}
DataSegment other = dns.Subsegment(offsetInDns + 6, length2);
return((DnsResourceData) new DnsResourceDataTransactionSignature(domainName, timeSigned, fudge, messageAuthenticationCode, originalId, error, other));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < 17)
{
return((DnsResourceData)null);
}
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns, length - 16, out domainName, out numBytesRead))
{
return((DnsResourceData)null);
}
offsetInDns += numBytesRead;
length -= numBytesRead;
if (length < 16)
{
return((DnsResourceData)null);
}
uint num1 = dns.ReadUInt(offsetInDns, Endianity.Big);
uint num2 = dns.ReadUInt(offsetInDns + 4, Endianity.Big);
DnsTransactionKeyMode mode = (DnsTransactionKeyMode)dns.ReadUShort(offsetInDns + 8, Endianity.Big);
DnsResponseCode error = (DnsResponseCode)dns.ReadUShort(offsetInDns + 10, Endianity.Big);
int length1 = (int)dns.ReadUShort(offsetInDns + 12, Endianity.Big);
if (length < 16 + length1)
{
return((DnsResourceData)null);
}
DataSegment key = dns.Subsegment(offsetInDns + 14, length1);
int num3 = 14 + length1;
offsetInDns += num3;
length -= num3;
int length2 = (int)dns.ReadUShort(offsetInDns, Endianity.Big);
if (length != 2 + length2)
{
return((DnsResourceData)null);
}
DataSegment other = dns.Subsegment(offsetInDns + 2, length2);
return((DnsResourceData) new DnsResourceDataTransactionKey(domainName, (SerialNumber32)num1, (SerialNumber32)num2, mode, error, key, other));
}
internal static bool TryRead(out ushort value, out DnsDomainName domainName, DnsDatagram dns, int offsetInDns, int length)
{
if (length < 2)
{
value = (ushort)0;
domainName = (DnsDomainName)null;
return(false);
}
value = dns.ReadUShort(offsetInDns, Endianity.Big);
length -= 2;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns + 2, length, out domainName, out numBytesRead))
{
return(false);
}
length -= numBytesRead;
return(length == 0);
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName, out numBytesRead))
{
return((DnsResourceData)null);
}
offsetInDns += numBytesRead;
length -= numBytesRead;
DnsTypeBitmaps instance = DnsTypeBitmaps.CreateInstance(dns.Buffer, dns.StartOffset + offsetInDns, length);
if (instance == null)
{
return((DnsResourceData)null);
}
return((DnsResourceData) new DnsResourceDataNextDomainSecure(domainName, instance));
}
internal static List <DnsDomainName> ReadDomainNames(DnsDatagram dns, int offsetInDns, int length, int numExpected = 0)
{
List <DnsDomainName> domainNames = new List <DnsDomainName>(numExpected);
while (length != 0)
{
DnsDomainName domainName;
int domainNameLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName, out domainNameLength))
{
return(null);
}
offsetInDns += domainNameLength;
length -= domainNameLength;
domainNames.Add(domainName);
}
return(domainNames);
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < 8)
{
return((DnsResourceData)null);
}
ushort order = dns.ReadUShort(offsetInDns, Endianity.Big);
ushort preference = dns.ReadUShort(offsetInDns + 2, Endianity.Big);
DataSegment data = dns.Subsegment(offsetInDns + 4, length - 4);
int offset = 0;
DataSegment flags = DnsResourceData.ReadString(data, ref offset);
if (flags == null || !DnsResourceDataNamingAuthorityPointer.IsLegalFlags(flags))
{
return((DnsResourceData)null);
}
DataSegment services = DnsResourceData.ReadString(data, ref offset);
if (services == null)
{
return((DnsResourceData)null);
}
DataSegment regularExpression = DnsResourceData.ReadString(data, ref offset);
if (regularExpression == null)
{
return((DnsResourceData)null);
}
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns + 4 + offset, length - 4 - offset, out domainName, out numBytesRead))
{
return((DnsResourceData)null);
}
if (4 + offset + numBytesRead != length)
{
return((DnsResourceData)null);
}
return((DnsResourceData) new DnsResourceDataNamingAuthorityPointer(order, preference, flags, services, regularExpression, domainName));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < 2)
{
return((DnsResourceData)null);
}
byte prefixLength = dns[offsetInDns];
if ((int)prefixLength > 128)
{
return((DnsResourceData)null);
}
++offsetInDns;
--length;
int length1 = DnsResourceDataA6.CalculateAddressSuffixLength(prefixLength);
if (length < length1)
{
return((DnsResourceData)null);
}
IpV6Address addressSuffix = new IpV6Address((UInt128)dns.ReadUnsignedBigInteger(offsetInDns, length1, Endianity.Big));
offsetInDns += length1;
length -= length1;
if (DnsResourceDataA6.IsAddressSuffixTooSmall(prefixLength, addressSuffix) || DnsResourceDataA6.IsAddressSuffixTooBig(prefixLength, addressSuffix))
{
return((DnsResourceData)null);
}
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName, out numBytesRead))
{
return((DnsResourceData)null);
}
if (numBytesRead != length)
{
return((DnsResourceData)null);
}
return((DnsResourceData) new DnsResourceDataA6(prefixLength, addressSuffix, domainName));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
DnsDomainName nextDomainName;
int nextDomainNameLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out nextDomainName, out nextDomainNameLength))
{
return(null);
}
offsetInDns += nextDomainNameLength;
length -= nextDomainNameLength;
DnsTypeBitmaps typeBitmaps = DnsTypeBitmaps.CreateInstance(dns.Buffer, dns.StartOffset + offsetInDns, length);
if (typeBitmaps == null)
{
return(null);
}
return(new DnsResourceDataNextDomainSecure(nextDomainName, typeBitmaps));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < ConstantPartLength)
{
return(null);
}
int hostIdentityTagLength = dns[offsetInDns + Offset.HostIdentityTagLength];
DnsPublicKeyAlgorithm publicKeyAlgorithm = (DnsPublicKeyAlgorithm)dns[offsetInDns + Offset.PublicKeyAlgorithm];
int publicKeyLength = dns.ReadUShort(offsetInDns + Offset.PublicKeyLength, Endianity.Big);
if (length < ConstantPartLength + hostIdentityTagLength + publicKeyLength)
{
return(null);
}
DataSegment hostIdentityTag = dns.Subsegment(offsetInDns + Offset.HostIdentityTag, hostIdentityTagLength);
int publicKeyOffset = offsetInDns + ConstantPartLength + hostIdentityTagLength;
DataSegment publicKey = dns.Subsegment(publicKeyOffset, publicKeyLength);
offsetInDns += ConstantPartLength + hostIdentityTagLength + publicKeyLength;
length -= ConstantPartLength + hostIdentityTagLength + publicKeyLength;
List <DnsDomainName> rendezvousServers = new List <DnsDomainName>();
while (length != 0)
{
DnsDomainName rendezvousServer;
int rendezvousServerLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out rendezvousServer, out rendezvousServerLength))
{
return(null);
}
rendezvousServers.Add(rendezvousServer);
offsetInDns += rendezvousServerLength;
length -= rendezvousServerLength;
}
return(new DnsResourceDataHostIdentityProtocol(hostIdentityTag, publicKeyAlgorithm, publicKey, rendezvousServers));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < 6)
{
return((DnsResourceData)null);
}
ushort priority = dns.ReadUShort(offsetInDns, Endianity.Big);
ushort weight = dns.ReadUShort(offsetInDns + 2, Endianity.Big);
ushort port = dns.ReadUShort(offsetInDns + 4, Endianity.Big);
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns + 6, length - 6, out domainName, out numBytesRead))
{
return((DnsResourceData)null);
}
if (6 + numBytesRead != length)
{
return((DnsResourceData)null);
}
return((DnsResourceData) new DnsResourceDataServerSelection(priority, weight, port, domainName));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < ConstantPartLength)
{
return(null);
}
ushort preference = dns.ReadUShort(offsetInDns + Offset.Preference, Endianity.Big);
offsetInDns += ConstantPartLength;
length -= ConstantPartLength;
DnsDomainName map822;
int map822Length;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out map822, out map822Length))
{
return(null);
}
offsetInDns += map822Length;
length -= map822Length;
DnsDomainName mapX400;
int mapX400Length;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out mapX400, out mapX400Length))
{
return(null);
}
length -= mapX400Length;
if (length != 0)
{
return(null);
}
return(new DnsResourceDataX400Pointer(preference, map822, mapX400));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out domainName, out numBytesRead))
{
return((DnsResourceData)null);
}
offsetInDns += numBytesRead;
length -= numBytesRead;
if (length > 16)
{
return((DnsResourceData)null);
}
DataSegment typeBitmap = dns.Subsegment(offsetInDns, length);
if (length != 0 && (int)typeBitmap.Last == 0)
{
return((DnsResourceData)null);
}
return((DnsResourceData) new DnsResourceDataNextDomain(domainName, typeBitmap));
}