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-rwxr-xr-xcontrib/seeds/makeseeds.py55
1 files changed, 31 insertions, 24 deletions
diff --git a/contrib/seeds/makeseeds.py b/contrib/seeds/makeseeds.py
index f5484ab33e..710881b1ae 100755
--- a/contrib/seeds/makeseeds.py
+++ b/contrib/seeds/makeseeds.py
@@ -121,6 +121,31 @@ def filtermultiport(ips):
hist[ip['sortkey']].append(ip)
return [value[0] for (key,value) in list(hist.items()) if len(value)==1]
+def lookup_asn(net, ip):
+ '''
+ Look up the asn for an IP (4 or 6) address by querying cymry.com, or None
+ if it could not be found.
+ '''
+ try:
+ if net == 'ipv4':
+ ipaddr = ip
+ prefix = '.origin'
+ else: # http://www.team-cymru.com/IP-ASN-mapping.html
+ res = str() # 2001:4860:b002:23::68
+ for nb in ip.split(':')[:4]: # pick the first 4 nibbles
+ for c in nb.zfill(4): # right padded with '0'
+ res += c + '.' # 2001 4860 b002 0023
+ ipaddr = res.rstrip('.') # 2.0.0.1.4.8.6.0.b.0.0.2.0.0.2.3
+ prefix = '.origin6'
+
+ asn = int([x.to_text() for x in dns.resolver.query('.'.join(
+ reversed(ipaddr.split('.'))) + prefix + '.asn.cymru.com',
+ 'TXT').response.answer][0].split('\"')[1].split(' ')[0])
+ return asn
+ except Exception:
+ sys.stderr.write('ERR: Could not resolve ASN for "' + ip + '"\n')
+ return None
+
# Based on Greg Maxwell's seed_filter.py
def filterbyasn(ips, max_per_asn, max_total):
# Sift out ips by type
@@ -129,33 +154,15 @@ def filterbyasn(ips, max_per_asn, max_total):
# Filter IPv46 by ASN
result = []
- asn_count = {}
+ asn_count = collections.defaultdict(int)
for ip in ips_ipv46:
if len(result) == max_total:
break
- try:
- if ip['net'] == 'ipv4':
- ipaddr = ip['ip']
- prefix = '.origin'
- else: # http://www.team-cymru.com/IP-ASN-mapping.html
- res = str() # 2001:4860:b002:23::68
- for nb in ip['ip'].split(':')[:4]: # pick the first 4 nibbles
- for c in nb.zfill(4): # right padded with '0'
- res += c + '.' # 2001 4860 b002 0023
- ipaddr = res.rstrip('.') # 2.0.0.1.4.8.6.0.b.0.0.2.0.0.2.3
- prefix = '.origin6'
-
- asn = int([x.to_text() for x in dns.resolver.query('.'.join(
- reversed(ipaddr.split('.'))) + prefix + '.asn.cymru.com',
- 'TXT').response.answer][0].split('\"')[1].split(' ')[0])
- if asn not in asn_count:
- asn_count[asn] = 0
- if asn_count[asn] == max_per_asn:
- continue
- asn_count[asn] += 1
- result.append(ip)
- except:
- sys.stderr.write('ERR: Could not resolve ASN for "' + ip['ip'] + '"\n')
+ asn = lookup_asn(ip['net'], ip['ip'])
+ if asn is None or asn_count[asn] == max_per_asn:
+ continue
+ asn_count[asn] += 1
+ result.append(ip)
# Add back Onions
result.extend(ips_onion)