internal static IpV4Address CalculateDestination(IpV4Address currentDestination, IpV4Options options)
{
if (options == null)
{
return(currentDestination);
}
IpV4OptionRoute ipV4OptionRoute = (IpV4OptionRoute)Enumerable.FirstOrDefault <IpV4Option>((IEnumerable <IpV4Option>)options.OptionsCollection, (Func <IpV4Option, bool>)(option =>
{
if (option.OptionType != IpV4OptionType.LooseSourceRouting)
{
return(option.OptionType == IpV4OptionType.StrictSourceRouting);
}
return(true);
}));
if (ipV4OptionRoute != null)
{
ReadOnlyCollection <IpV4Address> route = ipV4OptionRoute.Route;
if ((int)ipV4OptionRoute.PointedAddressIndex < route.Count)
{
return(route[route.Count - 1]);
}
}
return(currentDestination);
}
Option IOptionComplexFactory.CreateInstance(byte[] buffer, ref int offset, byte valueLength)
{
IpV4Address[] addresses;
byte pointedAddressIndex;
if (!IpV4OptionRoute.TryRead(out addresses, out pointedAddressIndex, buffer, ref offset, valueLength))
{
return((Option)null);
}
return((Option) new IpV4OptionLooseSourceRouting((IList <IpV4Address>)addresses, pointedAddressIndex));
}
Option IOptionComplexFactory.CreateInstance(byte[] buffer, ref int offset, byte valueLength)
{
IpV4Address[] addresses;
byte pointedAddressIndex;
if (!IpV4OptionRoute.TryRead(out addresses, out pointedAddressIndex, buffer, ref offset, valueLength))
{
return((Option)null);
}
return((Option) new IpV4OptionRecordRoute(pointedAddressIndex, addresses));
}
internal static IpV4Address CalculateDestination(IpV4Address currentDestination, IpV4Options options)
{
if (options == null)
{
return(currentDestination);
}
IpV4OptionRoute destinationControllerRouteOption =
(IpV4OptionRoute)options.OptionsCollection.FirstOrDefault(option => option.OptionType == IpV4OptionType.LooseSourceRouting ||
option.OptionType == IpV4OptionType.StrictSourceRouting);
if (destinationControllerRouteOption != null)
{
ReadOnlyCollection <IpV4Address> route = destinationControllerRouteOption.Route;
if (destinationControllerRouteOption.PointedAddressIndex < route.Count)
{
return(route[route.Count - 1]);
}
}
return(currentDestination);
}