import socket import knownnodes import socks import state from bmconfigparser import BMConfigParser from debug import logger def dns(): """ DNS bootstrap. This could be programmed to use the SOCKS proxy to do the DNS lookup some day but for now we will just rely on the entries in defaultKnownNodes.py. Hopefully either they are up to date or the user has run Bitmessage recently without SOCKS turned on and received good bootstrap nodes using that method. """ def try_add_known_node(stream, addr, port, method=''): try: socket.inet_aton(addr) except (TypeError, socket.error): return logger.info( 'Adding %s to knownNodes based on %s DNS bootstrap method', addr, method) knownnodes.addKnownNode(stream, state.Peer(addr, port)) proxy_type = BMConfigParser().get('bitmessagesettings', 'socksproxytype') if proxy_type == 'none': for port in [8080, 8444]: try: for item in socket.getaddrinfo( 'bootstrap%s.bitmessage.org' % port, 80): try_add_known_node(1, item[4][0], port) except: logger.error( 'bootstrap%s.bitmessage.org DNS bootstrapping failed.', port, exc_info=True ) elif proxy_type == 'SOCKS5': knownnodes.addKnownNode(1, state.Peer('quzwelsuziwqgpt2.onion', 8444)) logger.debug("Adding quzwelsuziwqgpt2.onion:8444 to knownNodes.") for port in [8080, 8444]: logger.debug("Resolving %i through SOCKS...", port) address_family = socket.AF_INET sock = socks.socksocket(address_family, socket.SOCK_STREAM) sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) sock.settimeout(20) proxytype = socks.PROXY_TYPE_SOCKS5 sockshostname = BMConfigParser().get( 'bitmessagesettings', 'sockshostname') socksport = BMConfigParser().getint( 'bitmessagesettings', 'socksport') # Do domain name lookups through the proxy; # though this setting doesn't really matter since we won't # be doing any domain name lookups anyway. rdns = True if BMConfigParser().getboolean( 'bitmessagesettings', 'socksauthentication'): socksusername = BMConfigParser().get( 'bitmessagesettings', 'socksusername') sockspassword = BMConfigParser().get( 'bitmessagesettings', 'sockspassword') sock.setproxy( proxytype, sockshostname, socksport, rdns, socksusername, sockspassword) else: sock.setproxy( proxytype, sockshostname, socksport, rdns) try: ip = sock.resolve("bootstrap" + str(port) + ".bitmessage.org") sock.shutdown(socket.SHUT_RDWR) sock.close() except: logger.error("SOCKS DNS resolving failed", exc_info=True) else: try_add_known_node(1, ip, port, 'SOCKS') else: logger.info( 'DNS bootstrap skipped because the proxy type does not support' ' DNS resolution.' )