Stub detection + no path protection for crawl converter

backend/crawler.py

@@ -196,7 +196,11 @@ def convert_crawl(crawl):
             prefix = "{}/{}".format(ann.ip, ann.prefix)
             path = list(map(int, ann.ASPath.split()))
             net.nodes[asn.number]['routing_table'].add((prefix, tuple(path)))
-            net.nodes[path[-1]]['prefixes'].add(prefix)
+            if path:
+                net.nodes[path[-1]]['prefixes'].add(prefix)
+                for path_asn in path:
+                    if path_asn not in (path[-1], path[0]):
+                        net.nodes[path_asn]['stub'] = False
 
     # add neighbor count
     for node, data in net.nodes(data=True):