diff --git a/contrib/seeds/makeseeds.py b/contrib/seeds/makeseeds.py
index 89fa4e215..2e9de4081 100755
--- a/contrib/seeds/makeseeds.py
+++ b/contrib/seeds/makeseeds.py
@@ -1,214 +1,214 @@
#!/usr/bin/env python3
# Copyright (c) 2013-2017 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
#
# Generate seeds.txt from Pieter's DNS seeder
#
import collections
import dns.resolver
import re
import sys
NSEEDS = 512
MAX_SEEDS_PER_ASN = 2
MIN_BLOCKS = 540000
# These are hosts that have been observed to be behaving strangely (e.g.
# aggressively connecting to every node).
SUSPICIOUS_HOSTS = {
"23.92.36.9", "72.36.89.11", "130.211.129.106", "178.63.107.226",
"83.81.130.26", "88.198.17.7", "148.251.238.178", "176.9.46.6",
"54.173.72.127", "54.174.10.182", "54.183.64.54", "54.194.231.211",
"54.66.214.167", "54.66.220.137", "54.67.33.14", "54.77.251.214",
"54.94.195.96", "54.94.200.247"
}
PATTERN_IPV4 = re.compile(
r"^((\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})):(\d+)$")
PATTERN_IPV6 = re.compile(r"^\[([0-9a-z:]+)\]:(\d+)$")
PATTERN_ONION = re.compile(
r"^([abcdefghijklmnopqrstuvwxyz234567]{16}\.onion):(\d+)$")
# Used to only select nodes with a user agent string compatible with the
# BCH/UAHF specification.
-PATTERN_AGENT = re.compile(r"^(/Bitcoin ABC:0.(22|23).(\d+)\(.+\)/)")
+PATTERN_AGENT = re.compile(r"^(/Bitcoin ABC:0.(23|24).(\d+)\(.+\)/)")
def parseline(line):
sline = line.split()
if len(sline) < 11:
return None
# The user agent is at the end of the line. It may contain space, so we
# concatenate.
for i in range(12, len(sline)):
sline[11] += ' ' + sline[i]
# Remove leftovers
del sline[12:]
m = PATTERN_IPV4.match(sline[0])
sortkey = None
ip = None
if m is None:
m = PATTERN_IPV6.match(sline[0])
if m is None:
m = PATTERN_ONION.match(sline[0])
if m is None:
return None
else:
net = 'onion'
ipstr = sortkey = m.group(1)
port = int(m.group(2))
else:
net = 'ipv6'
# Not interested in localhost
if m.group(1) in ['::']:
return None
ipstr = m.group(1)
# XXX parse IPv6 into number, could use name_to_ipv6 from
# generate-seeds
sortkey = ipstr
port = int(m.group(2))
else:
# Do IPv4 sanity check
ip = 0
for i in range(0, 4):
if int(m.group(i + 2)) < 0 or int(m.group(i + 2)) > 255:
return None
ip = ip + (int(m.group(i + 2)) << (8 * (3 - i)))
if ip == 0:
return None
net = 'ipv4'
sortkey = ip
ipstr = m.group(1)
port = int(m.group(6))
# Skip bad results.
if sline[1] == 0:
return None
# Extract uptime %.
uptime30 = float(sline[7][:-1])
# Extract Unix timestamp of last success.
lastsuccess = int(sline[2])
# Extract protocol version.
version = int(sline[10])
# Extract user agent.
agent = sline[11][1:-1]
# Extract service flags.
service = int(sline[9], 16)
# Extract blocks.
blocks = int(sline[8])
# Construct result.
return {
'net': net,
'ip': ipstr,
'port': port,
'ipnum': ip,
'uptime': uptime30,
'lastsuccess': lastsuccess,
'version': version,
'agent': agent,
'service': service,
'blocks': blocks,
'sortkey': sortkey,
}
def filtermultiport(ips):
'''Filter out hosts with more nodes per IP'''
hist = collections.defaultdict(list)
for ip in ips:
hist[ip['sortkey']].append(ip)
return [value[0] for (key, value) in list(hist.items()) if len(value) == 1]
# Based on Greg Maxwell's seed_filter.py
def filterbyasn(ips, max_per_asn, max_total):
# Sift out ips by type
ips_ipv46 = [ip for ip in ips if ip['net'] in ['ipv4', 'ipv6']]
ips_onion = [ip for ip in ips if ip['net'] == 'onion']
# Filter IPv46 by ASN
result = []
asn_count = {}
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
# 2001:4860:b002:23::68
res = str()
# pick the first 4 nibbles
for nb in ip['ip'].split(':')[:4]:
# right padded with '0'
for c in nb.zfill(4):
# 2001 4860 b002 0023
res += c + '.'
# 2.0.0.1.4.8.6.0.b.0.0.2.0.0.2.3
ipaddr = res.rstrip('.')
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 Exception:
sys.stderr.write(
'ERR: Could not resolve ASN for "' + ip['ip'] + '"\n')
# Add back Onions
result.extend(ips_onion)
return result
def main():
lines = sys.stdin.readlines()
ips = [parseline(line) for line in lines]
# Skip entries with valid address.
ips = [ip for ip in ips if ip is not None]
# Skip entries from suspicious hosts.
ips = [ip for ip in ips if ip['ip'] not in SUSPICIOUS_HOSTS]
# Enforce minimal number of blocks.
ips = [ip for ip in ips if ip['blocks'] >= MIN_BLOCKS]
# Require service bit 1.
ips = [ip for ip in ips if (ip['service'] & 1) == 1]
# Require at least 50% 30-day uptime.
ips = [ip for ip in ips if ip['uptime'] > 50]
# Require a known and recent user agent.
ips = [ip for ip in ips if PATTERN_AGENT.match(ip['agent'])]
# Sort by availability (and use last success as tie breaker)
ips.sort(key=lambda x:
(x['uptime'], x['lastsuccess'], x['ip']), reverse=True)
# Filter out hosts with multiple bitcoin ports, these are likely abusive
ips = filtermultiport(ips)
# Look up ASNs and limit results, both per ASN and globally.
ips = filterbyasn(ips, MAX_SEEDS_PER_ASN, NSEEDS)
# Sort the results by IP address (for deterministic output).
ips.sort(key=lambda x: (x['net'], x['sortkey']))
for ip in ips:
if ip['net'] == 'ipv6':
print('[{}]:{}'.format(ip['ip'], ip['port']))
else:
print('{}:{}'.format(ip['ip'], ip['port']))
if __name__ == '__main__':
main()