private void ParseExtensionHeaders()
{
if (_extensionHeaders != null)
{
return;
}
List <IpV6ExtensionHeader> extensionHeaders = new List <IpV6ExtensionHeader>();
if (HeaderLength > RealPayloadLength)
{
_isValid = false;
_extensionHeaders = extensionHeaders.AsReadOnly();
return;
}
int extendedHeaderLength = HeaderLength;
IpV4Protocol?nextHeader = NextHeader;
while (extendedHeaderLength + 8 <= RealPayloadLength && nextHeader.HasValue && IsExtensionHeader(nextHeader.Value))
{
int numBytesRead;
IpV6ExtensionHeader extensionHeader = IpV6ExtensionHeader.CreateInstance(nextHeader.Value,
Subsegment(extendedHeaderLength, Length - extendedHeaderLength),
out numBytesRead);
if (extensionHeader == null)
{
break;
}
nextHeader = extensionHeader.NextHeader;
extendedHeaderLength += numBytesRead;
}
_isValid = (!nextHeader.HasValue || !IsExtensionHeader(nextHeader.Value)) && (HeaderLength + _extensionHeadersLength == PayloadLength);
_extensionHeaders = extensionHeaders.AsReadOnly();
_extensionHeadersLength = extendedHeaderLength - HeaderLength;
}
public static IpV6ExtensionHeaders NextIpV6ExtensionHeaders(this Random random, int count, IpV4Protocol? nextHeader, bool allowEncapsulatingSecurityPayload)
{
if (count == 0)
return IpV6ExtensionHeaders.Empty;
IpV6ExtensionHeader[] headers = new IpV6ExtensionHeader[count];
for (int i = headers.Length - 1; i >= 0; --i)
{
headers[i] = random.NextIpV6ExtensionHeader(nextHeader, allowEncapsulatingSecurityPayload && i == headers.Length - 1);
nextHeader = headers[i].Protocol;
}
return new IpV6ExtensionHeaders(headers);
}
internal sealed override bool EqualsData(IpV6ExtensionHeader other)
{
return EqualsData(other as IpV6ExtensionHeaderMobility);
}
internal sealed override bool EqualsData(IpV6ExtensionHeader other)
{
return(EqualsData(other as IpV6ExtensionHeaderMobility));
}
internal sealed override bool EqualsData(IpV6ExtensionHeader other)
{
return EqualsData(other as IpV6ExtensionHeaderRouting);
}
public void IpV6ExtensionHeadersConstructors()
{
IEnumerable<IpV6ExtensionHeader> extensionHeadersEnumerable = new IpV6ExtensionHeader[0];
IList<IpV6ExtensionHeader> extensionHeadersIList = new IpV6ExtensionHeader[0];
Assert.AreEqual(new IpV6ExtensionHeaders(extensionHeadersEnumerable), new IpV6ExtensionHeaders(extensionHeadersIList));
}
internal abstract bool EqualsData(IpV6ExtensionHeader other);
/// <summary>
/// True iff the given extension header is equal to this extension header.
/// </summary>
public override bool Equals(IpV6ExtensionHeader other)
{
return(Equals(other as IpV6ExtensionHeaderAuthentication));
}
private void ValidateExtensionHeaderUnnamedField(IpV6ExtensionHeader header, XElement headerField, ref int optionsIndex)
{
IpV6ExtensionHeaderOptions headerOptions = header as IpV6ExtensionHeaderOptions;
string[] headerFieldShowParts = headerField.Show().Split(':');
string headerFieldShowName = headerFieldShowParts[0];
string headerFieldShowValue = headerFieldShowParts[1];
switch (headerFieldShowName)
{
case "Next header":
headerField.AssertValue((byte)header.NextHeader.Value);
break;
case "Length":
if (header.IsValid)
Assert.IsTrue(headerFieldShowValue.EndsWith(" (" + header.Length + " bytes)"));
break;
case "Router alert":
IpV6OptionRouterAlert routerAlert = (IpV6OptionRouterAlert)headerOptions.Options[optionsIndex++];
switch (headerFieldShowValue)
{
case " MLD (4 bytes)":
Assert.AreEqual(IpV6RouterAlertType.MulticastListenerDiscovery, routerAlert.RouterAlertType);
break;
case " RSVP (4 bytes)":
Assert.AreEqual(IpV6RouterAlertType.Rsvp, routerAlert.RouterAlertType);
break;
case " Unknown (4 bytes)":
MoreAssert.IsInRange((ushort)IpV6RouterAlertType.ActiveNetwork, (ushort)IpV6RouterAlertType.NextStepsInSignalingNatFirewallLayerProtocol, (ushort)routerAlert.RouterAlertType);
headerField.AssertValueInRange(0x05020002, 0x05020044);
break;
default:
throw new InvalidOperationException("Invalid ipv6 header route Router alert value " + headerFieldShowValue);
}
break;
case "Jumbo payload":
IpV6OptionJumboPayload jumboPayload = (IpV6OptionJumboPayload)headerOptions.Options[optionsIndex++];
Assert.AreEqual(" " + jumboPayload.JumboPayloadLength + " (6 bytes)", headerFieldShowValue);
break;
default:
throw new InvalidOperationException("Invalid ipv6 header unnamed field show name " + headerFieldShowName);
}
}
/// <summary>
/// True iff the given extension header is equal to this extension header.
/// </summary>
public sealed override bool Equals(IpV6ExtensionHeader other)
{
return(other != null &&
Protocol == other.Protocol && NextHeader == other.NextHeader && EqualsData(other));
}
private void ValidateExtensionHeaderUnnamedField(IpV6ExtensionHeader header, XElement headerField)
{
int optionIndex = -1;
ValidateExtensionHeaderUnnamedField(header, headerField, ref optionIndex);
}
internal abstract bool EqualsData(IpV6ExtensionHeader other);
/// <summary>
/// True iff the given extension header is equal to this extension header.
/// </summary>
public sealed override bool Equals(IpV6ExtensionHeader other)
{
return other != null &&
Protocol == other.Protocol && NextHeader == other.NextHeader && EqualsData(other);
}
internal override bool EqualsData(IpV6ExtensionHeader other)
{
return(EqualsData(other as IpV6ExtensionHeaderFragmentData));
}
internal override sealed bool EqualsData(IpV6ExtensionHeader other)
{
return EqualsData(other as IpV6ExtensionHeaderOptions);
}
/// <summary>
/// True iff the given extension header is equal to this extension header.
/// </summary>
public override bool Equals(IpV6ExtensionHeader other)
{
return(Equals(other as IpV6ExtensionHeaderEncapsulatingSecurityPayload));
}
internal override bool EqualsData(IpV6ExtensionHeader other)
{
return EqualsData(other as IpV6ExtensionHeaderFragmentData);
}
