class Aggregator (Attribute):
ID = AttributeID.AGGREGATOR
FLAG = Flag.TRANSITIVE|Flag.OPTIONAL
MULTIPLE = False
def __init__ (self,aggregator):
asn = 0
for value in (ord(_) for _ in aggregator[:-4]):
asn = (asn << 8) + value
self.asn=ASN(asn)
self.speaker=Inet(AFI.ipv4,SAFI.unicast,aggregator[-4:])
self._str = '%s:%s' % (self.asn,self.speaker)
def pack (self,asn4,as4agg=False):
if as4agg:
backup = self.ID
self.ID = AttributeID.AS4_AGGREGATOR
packed = self._attribute(self.asn.pack(True)+self.speaker.pack())
self.ID = backup
return packed
elif asn4:
return self._attribute(self.asn.pack(True)+self.speaker.pack())
elif not self.asn.asn4():
return self._attribute(self.asn.pack(False)+self.speaker.pack())
else:
return self._attribute(self.asn.trans()+self.speaker.pack()) + self.pack(True,True)
def __len__ (self):
raise RuntimeError('size can be 6 or 8 - we can not say')
def __str__ (self):
return self._str
def pack (self,asn4=None): return Inet.pack(self)
def __init__ (self,afi,safi,packed): Inet.__init__(self,afi,safi,packed) # This override Inet.pack too. self.packed = self._attribute(Inet.pack(self))
def pack(self, asn4=None):
return Inet.pack(self)
def __init__(self, afi, safi, packed):
Inet.__init__(self, afi, safi, packed)
# This override Inet.pack too.
self.packed = self._attribute(Inet.pack(self))
