4871eea3a1
0) Adjust BIP16 & BIP30 enforcement values 1) Reduce amount that peers can adjust our time to eliminate an attack vector. Thanks to coblee for this fix. 2) Zeitgeist2 patch - thanks to Lolcust and ArtForz. This fixes an issue where a 51% attack can change difficulty at will. Go back the full period unless it's the first retarget after genesis. 3) Avoid overflow in CalculateNextWorkRequired(). Thanks to pooler for the overflow fix. 4) SegWit ContextualCheckBlockHeader adjustment and extra coverage 5) Reject peer proto version below 70002. Thanks to wtogami for this patch. 6) Adjust default settings for Litecoin # Conflicts: # src/rpc/net.cpp # src/validation.cpp # test/functional/nulldummy.py # test/functional/p2p-segwit.py # test/functional/prioritise_transaction.py # test/functional/rawtransactions.py
139 lines
4.2 KiB
Python
Executable File
139 lines
4.2 KiB
Python
Executable File
#!/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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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', 9333)
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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', 19333)
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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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