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138 lines
4.2 KiB
138 lines
4.2 KiB
#!/usr/bin/env python3 |
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# Copyright (c) 2014-2017 Wladimir J. van der Laan |
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# Distributed under the MIT software license, see the accompanying |
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# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
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''' |
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Script to generate list of seed nodes for chainparams.cpp. |
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This script expects two text files in the directory that is passed as an |
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argument: |
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nodes_main.txt |
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nodes_test.txt |
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These files must consist of lines in the format |
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<ip> |
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<ip>:<port> |
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[<ipv6>] |
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[<ipv6>]:<port> |
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<onion>.onion |
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0xDDBBCCAA (IPv4 little-endian old pnSeeds format) |
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The output will be two data structures with the peers in binary format: |
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static SeedSpec6 pnSeed6_main[]={ |
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... |
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} |
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static SeedSpec6 pnSeed6_test[]={ |
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... |
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} |
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These should be pasted into `src/chainparamsseeds.h`. |
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''' |
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from base64 import b32decode |
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from binascii import a2b_hex |
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import sys, os |
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import re |
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# ipv4 in ipv6 prefix |
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pchIPv4 = bytearray([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff]) |
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# tor-specific ipv6 prefix |
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pchOnionCat = bytearray([0xFD,0x87,0xD8,0x7E,0xEB,0x43]) |
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def name_to_ipv6(addr): |
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if len(addr)>6 and addr.endswith('.onion'): |
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vchAddr = b32decode(addr[0:-6], True) |
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if len(vchAddr) != 16-len(pchOnionCat): |
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raise ValueError('Invalid onion %s' % s) |
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return pchOnionCat + vchAddr |
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elif '.' in addr: # IPv4 |
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return pchIPv4 + bytearray((int(x) for x in addr.split('.'))) |
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elif ':' in addr: # IPv6 |
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sub = [[], []] # prefix, suffix |
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x = 0 |
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addr = addr.split(':') |
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for i,comp in enumerate(addr): |
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if comp == '': |
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if i == 0 or i == (len(addr)-1): # skip empty component at beginning or end |
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continue |
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x += 1 # :: skips to suffix |
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assert(x < 2) |
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else: # two bytes per component |
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val = int(comp, 16) |
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sub[x].append(val >> 8) |
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sub[x].append(val & 0xff) |
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nullbytes = 16 - len(sub[0]) - len(sub[1]) |
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assert((x == 0 and nullbytes == 0) or (x == 1 and nullbytes > 0)) |
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return bytearray(sub[0] + ([0] * nullbytes) + sub[1]) |
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elif addr.startswith('0x'): # IPv4-in-little-endian |
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return pchIPv4 + bytearray(reversed(a2b_hex(addr[2:]))) |
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else: |
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raise ValueError('Could not parse address %s' % addr) |
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def parse_spec(s, defaultport): |
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match = re.match('\[([0-9a-fA-F:]+)\](?::([0-9]+))?$', s) |
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if match: # ipv6 |
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host = match.group(1) |
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port = match.group(2) |
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elif s.count(':') > 1: # ipv6, no port |
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host = s |
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port = '' |
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else: |
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(host,_,port) = s.partition(':') |
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if not port: |
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port = defaultport |
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else: |
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port = int(port) |
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host = name_to_ipv6(host) |
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return (host,port) |
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def process_nodes(g, f, structname, defaultport): |
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g.write('static SeedSpec6 %s[] = {\n' % structname) |
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first = True |
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for line in f: |
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comment = line.find('#') |
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if comment != -1: |
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line = line[0:comment] |
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line = line.strip() |
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if not line: |
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continue |
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if not first: |
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g.write(',\n') |
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first = False |
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(host,port) = parse_spec(line, defaultport) |
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hoststr = ','.join(('0x%02x' % b) for b in host) |
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g.write(' {{%s}, %i}' % (hoststr, port)) |
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g.write('\n};\n') |
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def main(): |
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if len(sys.argv)<2: |
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print(('Usage: %s <path_to_nodes_txt>' % sys.argv[0]), file=sys.stderr) |
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sys.exit(1) |
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g = sys.stdout |
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indir = sys.argv[1] |
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g.write('#ifndef BITCOIN_CHAINPARAMSSEEDS_H\n') |
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g.write('#define BITCOIN_CHAINPARAMSSEEDS_H\n') |
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g.write('/**\n') |
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g.write(' * List of fixed seed nodes for the bitcoin network\n') |
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g.write(' * AUTOGENERATED by contrib/seeds/generate-seeds.py\n') |
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g.write(' *\n') |
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g.write(' * Each line contains a 16-byte IPv6 address and a port.\n') |
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g.write(' * IPv4 as well as onion addresses are wrapped inside a IPv6 address accordingly.\n') |
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g.write(' */\n') |
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with open(os.path.join(indir,'nodes_main.txt'),'r') as f: |
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process_nodes(g, f, 'pnSeed6_main', 8333) |
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g.write('\n') |
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with open(os.path.join(indir,'nodes_test.txt'),'r') as f: |
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process_nodes(g, f, 'pnSeed6_test', 18333) |
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g.write('#endif // BITCOIN_CHAINPARAMSSEEDS_H\n') |
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if __name__ == '__main__': |
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main() |
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