internal static IpV4OptionTimestampAndAddress Read(IpV4OptionTimestampType timestampType, byte overflow, byte pointedIndex, byte[] buffer, ref int offset, int numValues)
{
if (numValues % 2 != 0)
{
return((IpV4OptionTimestampAndAddress)null);
}
IpV4OptionTimedAddress[] optionTimedAddressArray = new IpV4OptionTimedAddress[numValues / 2];
for (int index = 0; index != numValues / 2; ++index)
{
optionTimedAddressArray[index] = new IpV4OptionTimedAddress(ByteArrayExtensions.ReadIpV4Address(buffer, ref offset, Endianity.Big), ByteArrayExtensions.ReadIpV4TimeOfDay(buffer, ref offset, Endianity.Big));
}
return(new IpV4OptionTimestampAndAddress(timestampType, overflow, pointedIndex, optionTimedAddressArray));
}
private static bool TryReadEntry(byte[] buffer, int payloadOffset, int payloadLength, GreSourceRouteEntryAddressFamily addressFamily, int offsetInPayload, out GreSourceRouteEntry entry)
{
entry = (GreSourceRouteEntry)null;
switch (addressFamily)
{
case GreSourceRouteEntryAddressFamily.IpSourceRoute:
if (offsetInPayload % 4 != 0 || payloadLength % 4 != 0)
{
return(false);
}
int length1 = payloadLength / 4;
IpV4Address[] addresses = new IpV4Address[length1];
for (int index = 0; index != length1; ++index)
{
addresses[index] = ByteArrayExtensions.ReadIpV4Address(buffer, payloadOffset + index * 4, Endianity.Big);
}
entry = (GreSourceRouteEntry) new GreSourceRouteEntryIp(addresses, offsetInPayload / 4);
return(true);
case GreSourceRouteEntryAddressFamily.AsSourceRoute:
if (offsetInPayload % 2 != 0 || payloadLength % 2 != 0)
{
return(false);
}
int length2 = payloadLength / 2;
ushort[] asNumbers = new ushort[length2];
for (int index = 0; index != length2; ++index)
{
asNumbers[index] = ByteArrayExtensions.ReadUShort(buffer, payloadOffset + index * 2, Endianity.Big);
}
entry = (GreSourceRouteEntry) new GreSourceRouteEntryAs(asNumbers, offsetInPayload / 2);
return(true);
default:
Datagram data = new Datagram(buffer, payloadOffset, payloadLength);
entry = (GreSourceRouteEntry) new GreSourceRouteEntryUnknown(addressFamily, data, offsetInPayload);
return(true);
}
}
internal static bool TryRead(out IpV4Address[] addresses, out byte pointedAddressIndex, byte[] buffer, ref int offset, byte valueLength)
{
addresses = (IpV4Address[])null;
pointedAddressIndex = (byte)0;
if ((int)valueLength < 1 || (int)valueLength % 4 != 1)
{
return(false);
}
byte num = buffer[offset++];
if ((int)num % 4 != 0 || (int)num < 4)
{
return(false);
}
pointedAddressIndex = (byte)((int)num / 4 - 1);
int length = (int)valueLength / 4;
addresses = new IpV4Address[length];
for (int index = 0; index != length; ++index)
{
addresses[index] = ByteArrayExtensions.ReadIpV4Address(buffer, ref offset, Endianity.Big);
}
return(true);
}
Option IOptionComplexFactory.CreateInstance(byte[] buffer, ref int offset, byte valueLength)
{
if ((int)valueLength != 10)
{
return((Option)null);
}
return((Option) new IpV4OptionTraceRoute(ByteArrayExtensions.ReadUShort(buffer, ref offset, Endianity.Big), ByteArrayExtensions.ReadUShort(buffer, ref offset, Endianity.Big), ByteArrayExtensions.ReadUShort(buffer, ref offset, Endianity.Big), ByteArrayExtensions.ReadIpV4Address(buffer, ref offset, Endianity.Big)));
}
