public static (Capability capability, int length) DecodeCapability(byte[] data, int offset)
{
Capability capability;
var capabilityType = (CapabilityCode)data[offset];
switch (capabilityType)
{
case CapabilityCode.Multiprotocol:
capability = new CapabilityMultiProtocol();
break;
case CapabilityCode.RouteRefresh:
capability = new CapabilityRouteRefresh();
break;
case CapabilityCode.GracefulRestart:
capability = new CapabilityGracefulRestart();
break;
case CapabilityCode.FourOctetAs:
capability = new CapabilityFourOctetAsNumber();
break;
case CapabilityCode.AddPath:
capability = new CapabilityAddPath();
break;
case CapabilityCode.EnhancedRouteRefresh:
capability = new CapabilityEnhancedRouteRefresh();
break;
case CapabilityCode.CiscoRouteRefresh:
capability = new CapabilityCiscoRouteRefresh();
break;
default:
capability = new CapabilityUnknown();
break;
}
capability.Code = capabilityType;
capability.Length = data[offset + 1];
if (capability.Length > 0)
{
offset += 2;
capability.Decode(data, offset);
}
return(capability, capability.Length + 2);
}