bgp/examples/pybgpstream-moas.py

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2023-09-04 03:37:29 +00:00
#!/usr/bin/env python
from collections import defaultdict
import pybgpstream
stream = pybgpstream.BGPStream(
# Consider this time interval:
# Sat, 01 Aug 2015 7:50:00 GMT - 08:10:00 GMT
from_time="2015-08-01 07:50:00", until_time="2015-08-01 08:10:00",
collectors=["rrc00"],
record_type="ribs",
)
# <prefix, origin-ASns-set > dictionary
prefix_origin = defaultdict(set)
for rec in stream.records():
for elem in rec:
# Get the prefix
pfx = elem.fields["prefix"]
# Get the list of ASes in the AS path
ases = elem.fields["as-path"].split(" ")
if len(ases) > 0:
# Get the origin ASn (rightmost)
origin = ases[-1]
# Insert the origin ASn in the set of
# origins for the prefix
prefix_origin[pfx].add(origin)
# Print the list of MOAS prefix and their origin ASns
for pfx in prefix_origin:
if len(prefix_origin[pfx]) > 1:
print((pfx, ",".join(prefix_origin[pfx])))