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-rwxr-xr-xcontrib/seeds/generate-seeds.py138
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diff --git a/contrib/seeds/generate-seeds.py b/contrib/seeds/generate-seeds.py
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+#!/usr/bin/python
+# Copyright (c) 2014 Wladmir J. van der Laan
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+'''
+Script to generate list of seed nodes for chainparams.cpp.
+
+This script expects two text files in the directory that is passed as an
+argument:
+
+ nodes_main.txt
+ nodes_test.txt
+
+These files must consist of lines in the format
+
+ <ip>
+ <ip>:<port>
+ [<ipv6>]
+ [<ipv6>]:<port>
+ <onion>.onion
+ 0xDDBBCCAA (IPv4 little-endian old pnSeeds format)
+
+The output will be two data structures with the peers in binary format:
+
+ static SeedSpec6 pnSeed6_main[]={
+ ...
+ }
+ static SeedSpec6 pnSeed6_test[]={
+ ...
+ }
+
+These should be pasted into `src/chainparamsseeds.h`.
+'''
+from __future__ import print_function, division
+from base64 import b32decode
+from binascii import a2b_hex
+import sys, os
+import re
+
+# ipv4 in ipv6 prefix
+pchIPv4 = bytearray([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff])
+# tor-specific ipv6 prefix
+pchOnionCat = bytearray([0xFD,0x87,0xD8,0x7E,0xEB,0x43])
+
+def name_to_ipv6(addr):
+ if len(addr)>6 and addr.endswith('.onion'):
+ vchAddr = b32decode(addr[0:-6], True)
+ if len(vchAddr) != 16-len(pchOnionCat):
+ raise ValueError('Invalid onion %s' % s)
+ return pchOnionCat + vchAddr
+ elif '.' in addr: # IPv4
+ return pchIPv4 + bytearray((int(x) for x in addr.split('.')))
+ elif ':' in addr: # IPv6
+ sub = [[], []] # prefix, suffix
+ x = 0
+ addr = addr.split(':')
+ for i,comp in enumerate(addr):
+ if comp == '':
+ if i == 0 or i == (len(addr)-1): # skip empty component at beginning or end
+ continue
+ x += 1 # :: skips to suffix
+ assert(x < 2)
+ else: # two bytes per component
+ val = int(comp, 16)
+ sub[x].append(val >> 8)
+ sub[x].append(val & 0xff)
+ nullbytes = 16 - len(sub[0]) - len(sub[1])
+ assert((x == 0 and nullbytes == 0) or (x == 1 and nullbytes > 0))
+ return bytearray(sub[0] + ([0] * nullbytes) + sub[1])
+ elif addr.startswith('0x'): # IPv4-in-little-endian
+ return pchIPv4 + bytearray(reversed(a2b_hex(addr[2:])))
+ else:
+ raise ValueError('Could not parse address %s' % addr)
+
+def parse_spec(s, defaultport):
+ match = re.match('\[([0-9a-fA-F:]+)\](?::([0-9]+))?$', s)
+ if match: # ipv6
+ host = match.group(1)
+ port = match.group(2)
+ elif s.count(':') > 1: # ipv6, no port
+ host = s
+ port = ''
+ else:
+ (host,_,port) = s.partition(':')
+
+ if not port:
+ port = defaultport
+ else:
+ port = int(port)
+
+ host = name_to_ipv6(host)
+
+ return (host,port)
+
+def process_nodes(g, f, structname, defaultport):
+ g.write('static SeedSpec6 %s[] = {\n' % structname)
+ first = True
+ for line in f:
+ comment = line.find('#')
+ if comment != -1:
+ line = line[0:comment]
+ line = line.strip()
+ if not line:
+ continue
+ if not first:
+ g.write(',\n')
+ first = False
+
+ (host,port) = parse_spec(line, defaultport)
+ hoststr = ','.join(('0x%02x' % b) for b in host)
+ g.write(' {{%s}, %i}' % (hoststr, port))
+ g.write('\n};\n')
+
+def main():
+ if len(sys.argv)<2:
+ print(('Usage: %s <path_to_nodes_txt>' % sys.argv[0]), file=sys.stderr)
+ exit(1)
+ g = sys.stdout
+ indir = sys.argv[1]
+ g.write('#ifndef BITCOIN_CHAINPARAMSSEEDS_H\n')
+ g.write('#define BITCOIN_CHAINPARAMSSEEDS_H\n')
+ g.write('/**\n')
+ g.write(' * List of fixed seed nodes for the bitcoin network\n')
+ g.write(' * AUTOGENERATED by contrib/seeds/generate-seeds.py\n')
+ g.write(' *\n')
+ g.write(' * Each line contains a 16-byte IPv6 address and a port.\n')
+ g.write(' * IPv4 as well as onion addresses are wrapped inside a IPv6 address accordingly.\n')
+ g.write(' */\n')
+ with open(os.path.join(indir,'nodes_main.txt'),'r') as f:
+ process_nodes(g, f, 'pnSeed6_main', 8333)
+ g.write('\n')
+ with open(os.path.join(indir,'nodes_test.txt'),'r') as f:
+ process_nodes(g, f, 'pnSeed6_test', 18333)
+ g.write('#endif // BITCOIN_CHAINPARAMSSEEDS_H\n')
+
+if __name__ == '__main__':
+ main()
+