/// <summary>
/// Creates an instance from flow identifier, priority, status and sub options.
/// </summary>
/// <param name="flowIdentifier">
/// Includes the unique identifier for the flow binding.
/// This field is used to refer to an existing flow binding or to create a new flow binding.
/// The value of this field is set by the mobile node.
/// FID = 0 is reserved and must not be used.
/// </param>
/// <param name="priority">
/// Indicates the priority of a particular option.
/// This field is needed in cases where two different flow descriptions in two different options overlap.
/// The priority field decides which policy should be executed in those cases.
/// A lower number in this field indicates a higher priority.
/// Value '0' is reserved and must not be used.
/// Must be unique to each of the flows pertaining to a given MN.
/// In other words, two FIDs must not be associated with the same priority value.
/// </param>
/// <param name="status">
/// indicates the success or failure of the flow binding operation for the particular flow in the option.
/// This field is not relevant to the binding update message as a whole or to other flow identification options.
/// This field is only relevant when included in the Binding Acknowledgement message and must be ignored in the binding update message.
/// </param>
/// <param name="subOptions">Zero or more sub-options.</param>
public IpV6MobilityOptionFlowIdentification(ushort flowIdentifier, ushort priority, IpV6FlowIdentificationStatus status,
IpV6FlowIdentificationSubOptions subOptions)
: base(IpV6MobilityOptionType.FlowIdentification)
{
if (subOptions == null)
throw new ArgumentNullException("subOptions");
if (Offset.SubOptions + subOptions.BytesLength > byte.MaxValue)
{
throw new ArgumentOutOfRangeException("subOptions", subOptions,
string.Format(CultureInfo.InvariantCulture,
"Sub Options take {0} bytes, which is more than the maximum length of {1} bytes",
subOptions.BytesLength, (byte.MaxValue - Offset.SubOptions)));
}
FlowIdentifier = flowIdentifier;
Priority = priority;
Status = status;
SubOptions = subOptions;
}
internal override IpV6MobilityOption CreateInstance(DataSegment data)
{
if (data.Length < OptionDataMinimumLength)
return null;
ushort flowIdentifier = data.ReadUShort(Offset.FlowIdentifier, Endianity.Big);
ushort priority = data.ReadUShort(Offset.Priority, Endianity.Big);
IpV6FlowIdentificationStatus status = (IpV6FlowIdentificationStatus)data[Offset.Status];
IpV6FlowIdentificationSubOptions subOptions =
new IpV6FlowIdentificationSubOptions(data.Subsegment(Offset.SubOptions, data.Length - Offset.SubOptions));
return new IpV6MobilityOptionFlowIdentification(flowIdentifier, priority, status, subOptions);
}
