def from_bytes(cls, bytes):
self = cls()
d = {}
idx = 0
for kind in ('withdraw', 'pathattr'):
plen, = struct.unpack_from('!H', bytes, idx)
idx += 2
d[kind] = bytes[idx:idx+plen]
idx += plen
self.nlri = nlri.parse(bytes[idx:])
self.withdraw = nlri.parse(d['withdraw'])
self.pathattr = OD()
idx = 0
bytes = d['pathattr']
while idx < len(bytes):
used, pattr = pathattr.decode(bytes, idx)
idx += used
self.pathattr[pattr.type] = pattr
return self
def from_bytes(cls, val):
afi, safi = struct.unpack_from('!HB', val)
w = nlri.parse(val[3:], afi, safi)
v = cls(dict(afi=afi, safi=safi, withdraw=w))
return v
def from_bytes(cls, val):
afi, safi = struct.unpack_from('!HB', val)
w = nlri.parse(val[3:], afi, safi)
v = cls(dict(afi=afi, safi=safi, withdraw=w))
return v
def from_bytes(cls, val):
afi, safi, nhlen = struct.unpack_from('!HBB', val)
fmt = '%dsB' % (nhlen, )
nh, reserved = struct.unpack_from(fmt, val, 4)
if afi == 1 and safi == 128:
# vpnv4
rdlo, rdhi, nhip = struct.unpack('!II4s', nh)
nh = socket.inet_ntoa(nhip)
n = nlri.parse(val[5 + nhlen:], afi, safi)
v = cls(dict(afi=afi, safi=safi, nh=nh, nlri=n))
if reserved:
# probably useless, but pass it through anyway
v.reserved = reserved
return v
def from_bytes(cls, val):
afi, safi, nhlen = struct.unpack_from('!HBB', val)
fmt = '%dsB' % (nhlen,)
nh, reserved = struct.unpack_from(fmt, val, 4)
if afi==1 and safi==128:
# vpnv4
rdlo, rdhi, nhip = struct.unpack('!II4s', nh)
nh = socket.inet_ntoa(nhip)
n = nlri.parse(val[5+nhlen:], afi, safi)
v = cls(dict(afi=afi, safi=safi, nh=nh, nlri=n))
if reserved:
# probably useless, but pass it through anyway
v.reserved = reserved
return v