Update Atlas probe crawler to fetch all probes

For the planned measurement crawler it is required to have more than
only the connected probes in the graph. Especially long-running
measurements can contain disconnected probes, but we might still want to
model them.

Note that this crawler can now create dangling nodes, e.g., there is a
status "Never Connected" where the probes have no IP/ASN/country. But
instead of arbitrarily deciding what to include and what not, we just
fetch all (public) probes instead, since the number is not very large.

This commit also updates the IPv6 handling to guarantee a canonical
form.

iyp/crawlers/ripe/atlas_probes.py

@@ -1,4 +1,5 @@
 import argparse
+import ipaddress
 import json
 import logging
 import os
@@ -64,7 +65,6 @@ def __add_if_not_none(v, s: set):
 
     def run(self):
         params = {'format': 'json',
-                  'status': 1,  # Connected
                   'is_public': True,
                   'page_size': 500}
         r = self.session.get(URL, params=params)
@@ -73,7 +73,7 @@ def run(self):
             next_url, next_data = self.__execute_query(next_url)
             data += next_data
             logging.info(f'Added {len(next_data)} probes. Total: {len(data)}')
-        print(f'Fetched {len(data)} connected probes.', file=sys.stderr)
+        print(f'Fetched {len(data)} probes.', file=sys.stderr)
 
         # Compute nodes
         probe_ids = set()
@@ -92,14 +92,15 @@ def run(self):
                 logging.warning(f'Duplicate probe ID: {probe_id}. Probably caused by changing probe connectivity while '
                                 'fetching.')
                 continue
+
             ipv4 = probe['address_v4']
-            asv4 = probe['asn_v4']
+            # Ensure proper IP formatting.
             ipv6 = probe['address_v6']
+            if ipv6:
+                ipv6 = ipaddress.ip_address(ipv6).compressed
+                probe['address_v6'] = ipv6
+            asv4 = probe['asn_v4']
             asv6 = probe['asn_v6']
-            # A probe should have at least IP/AS information for IPv4 or IPv6.
-            if not all((ipv4, asv4)) and not all((ipv6, asv6)):
-                logging.warning(f'No IPv4/v6 information for probe {probe}')
-                continue
 
             probe_ids.add(probe_id)
             valid_probes.append(probe)
@@ -115,6 +116,10 @@ def run(self):
                 else:
                     logging.warning(f'Skipping creation of COUNTRY relationship of probe {probe["id"]} due to non-ISO '
                                     f'country code: {country_code}')
+            else:
+                # Our country_code property formatter does not like None objects, so
+                # remove the property instead.
+                probe.pop('country_code')
 
         # push nodes
         logging.info('Fetching/pushing nodes')
@@ -154,8 +159,9 @@ def run(self):
                 as_qid = as_id[asv6]
                 located_in_links.append({'src_id': probe_qid, 'dst_id': as_qid, 'props': [self.reference, {'af': 6}]})
 
-            country_code = probe['country_code']
-            if country_code and country_code in iso3166.countries_by_alpha2:
+            if ('country_code' in probe
+                and (country_code := probe['country_code'])
+                    and country_code in iso3166.countries_by_alpha2):
                 country_qid = country_id[country_code]
                 country_links.append({'src_id': probe_qid, 'dst_id': country_qid,
                                      'props': [self.reference]})