def unpack (cls,data,length):
if length != 4:
raise Notify(3,5, "Unable to decode attribute. Incorrect Size")
else:
b = BitArray(bytes=data)
colormask = b.unpack('uintbe:32')
return cls(colormask=colormask)
def unpack (cls,data,length):
if len(data) == 2:
# OSPF
igpmetric = unpack('!H',data)[0]
return cls(igpmetric=igpmetric)
elif len(data) == 1:
# ISIS small metrics
igpmetric = unpack('!B',data)[0]
return cls(igpmetric=igpmetric)
elif len(data) == 3:
# ISIS wide metrics
b = BitArray(bytes=data)
igpmetric = b.unpack('uintbe:24')
return cls(igpmetric=igpmetric)
else:
raise Notify(3,5, "Incorrect IGP Metric Size")
