def path_information(tokeniser):
try:
pi = tokeniser()
if pi.isdigit():
return PathInfo(integer=int(pi))
return PathInfo(ip=pi)
except ValueError:
raise ValueError('invaluid path-information')
def unpack(cls, afi, safi, data, addpath, nexthop, action):
labels, rd, path_identifier, mask, size, prefix, left = NLRI._nlri(
afi, safi, data, action, addpath)
nlri = cls(afi, safi, prefix, mask, nexthop, action)
if path_identifier:
nlri.path_info = PathInfo(None, None, path_identifier)
return len(data) - len(left), nlri
def unpack(cls, afi, safi, bgp, addpath, nexthop, action):
labels, rd, path_identifier, mask, size, prefix, left = NLRI._nlri(
afi, safi, bgp, action, addpath)
nlri = cls(afi, safi, prefix, mask, nexthop, action)
if labels: nlri.labels = Labels(labels)
if rd: nlri.rd = RouteDistinguisher(rd)
if path_identifier:
nlri.path_info = PathInfo(None, None, path_identifier)
return len(bgp) - len(left), nlri
def unpack(cls, afi, safi, data, addpath, nexthop, action):
if addpath:
path_identifier = PathInfo(None, None, data[:4])
data = data[4:]
length = 4
else:
path_identifier = None
length = 0
labels, rd, mask, size, prefix, left = NLRI._nlri(
afi, safi, data, action)
nlri = cls(afi, safi, prefix, mask, nexthop, action)
if addpath:
nlri.path_info = path_identifier
return length + len(data) - len(left), nlri