public T GetOption <T>(UInt16 optionType) where T : DHCPv6PacketOption
{
if (HasOption(optionType) == false)
{
return(null);
}
DHCPv6PacketOption option = _options.First(x => x.Code == optionType);
if (option is T == false)
{
return(null);
}
return((T)option);
}
internal static DHCPv6RelayPacket FromByteArray(byte[] rawData, int offset)
{
DHCPv6PacketTypes type = (DHCPv6PacketTypes)rawData[offset];
offset += 1;
Byte hopCount = rawData[offset];
offset += 1;
IPv6Address linkAddress = IPv6Address.FromByteArray(rawData, offset);
offset += 16;
IPv6Address peerAddress = IPv6Address.FromByteArray(rawData, offset);
offset += 16;
List <DHCPv6PacketOption> options = new List <DHCPv6PacketOption>();
Byte[] innerPacketOptionValue = null;
Int32 byteIndex = offset;
while (byteIndex < rawData.Length)
{
UInt16 optionCode = ByteHelper.ConvertToUInt16FromByte(rawData, byteIndex);
UInt16 length = ByteHelper.ConvertToUInt16FromByte(rawData, byteIndex + 2);
Byte[] optionData = ByteHelper.CopyData(rawData, byteIndex, length + 4);
if (optionCode == (Byte)DHCPv6PacketOptionTypes.RelayMessage)
{
innerPacketOptionValue = ByteHelper.CopyData(optionData, 4);
}
else
{
DHCPv6PacketOption suboption = DHCPv6PacketOptionFactory.GetOption(optionCode, optionData);
options.Add(suboption);
}
byteIndex += 4 + length;
}
return(new DHCPv6RelayPacket(
type,
hopCount,
linkAddress, peerAddress,
options,
DHCPv6Packet.FromByteArray(innerPacketOptionValue)));
}
public static IEnumerable <DHCPv6PacketOption> GetOptions(Byte[] subOptionData, Int32 offset)
{
List <DHCPv6PacketOption> options = new List <DHCPv6PacketOption>();
Int32 byteIndex = offset;
while (byteIndex < subOptionData.Length)
{
UInt16 optionCode = ByteHelper.ConvertToUInt16FromByte(subOptionData, byteIndex);
UInt16 length = ByteHelper.ConvertToUInt16FromByte(subOptionData, byteIndex + 2);
Byte[] optionData = ByteHelper.CopyData(subOptionData, byteIndex, length + 4);
DHCPv6PacketOption suboption = GetOption(optionCode, optionData);
options.Add(suboption);
byteIndex += 4 + length;
}
return(options);
}
