DNS bootstrap over Tor
If proxy type is SOCKS5, it will try to perform DNS bootstrap using the Tor RESOLVE extension.
This commit is contained in:
mailchuck
parent
1e89616c0f
commit
d75533c6b6
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@ -5,6 +5,7 @@ import pickle
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import time
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from debug import logger
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import socks
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def knownNodes():
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try:
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@ -37,20 +38,51 @@ def dns():
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# defaultKnownNodes.py. Hopefully either they are up to date or the user
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# has run Bitmessage recently without SOCKS turned on and received good
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# bootstrap nodes using that method.
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with shared.printLock:
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if shared.config.get('bitmessagesettings', 'socksproxytype') == 'none':
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if shared.config.get('bitmessagesettings', 'socksproxytype') == 'none':
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try:
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for item in socket.getaddrinfo('bootstrap8080.bitmessage.org', 80):
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logger.info('Adding ' + item[4][0] + ' to knownNodes based on DNS bootstrap method')
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shared.knownNodes[1][shared.Peer(item[4][0], 8080)] = int(time.time())
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except:
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logger.error('bootstrap8080.bitmessage.org DNS bootstrapping failed.')
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try:
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for item in socket.getaddrinfo('bootstrap8444.bitmessage.org', 80):
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logger.info ('Adding ' + item[4][0] + ' to knownNodes based on DNS bootstrap method')
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shared.knownNodes[1][shared.Peer(item[4][0], 8444)] = int(time.time())
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except:
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logger.error('bootstrap8444.bitmessage.org DNS bootstrapping failed.')
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elif shared.config.get('bitmessagesettings', 'socksproxytype') == 'SOCKS5':
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for port in [8080, 8444]:
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logger.debug("Resolving %i through SOCKS...", port)
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address_family = socket.AF_INET
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sock = socks.socksocket(address_family, socket.SOCK_STREAM)
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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sock.settimeout(20)
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proxytype = socks.PROXY_TYPE_SOCKS5
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sockshostname = shared.config.get(
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'bitmessagesettings', 'sockshostname')
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socksport = shared.config.getint(
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'bitmessagesettings', 'socksport')
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rdns = True # 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.
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if shared.config.getboolean('bitmessagesettings', 'socksauthentication'):
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socksusername = shared.config.get(
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'bitmessagesettings', 'socksusername')
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sockspassword = shared.config.get(
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'bitmessagesettings', 'sockspassword')
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sock.setproxy(
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proxytype, sockshostname, socksport, rdns, socksusername, sockspassword)
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else:
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sock.setproxy(
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proxytype, sockshostname, socksport, rdns)
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try:
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for item in socket.getaddrinfo('bootstrap8080.bitmessage.org', 80):
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logger.info('Adding ' + item[4][0] + ' to knownNodes based on DNS bootstrap method')
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shared.knownNodes[1][shared.Peer(item[4][0], 8080)] = int(time.time())
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ip = sock.resolve("bootstrap" + str(port) + ".bitmessage.org")
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sock.shutdown(socket.SHUT_RDWR)
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sock.close()
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except:
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logger.error('bootstrap8080.bitmessage.org DNS bootstrapping failed.')
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try:
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for item in socket.getaddrinfo('bootstrap8444.bitmessage.org', 80):
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logger.info ('Adding ' + item[4][0] + ' to knownNodes based on DNS bootstrap method')
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shared.knownNodes[1][shared.Peer(item[4][0], 8444)] = int(time.time())
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except:
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logger.error('bootstrap8444.bitmessage.org DNS bootstrapping failed.')
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else:
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logger.info('DNS bootstrap skipped because SOCKS is used.')
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logger.error("SOCKS DNS resolving failed", exc_info=True)
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if ip is not None:
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logger.info ('Adding ' + ip + ' to knownNodes based on SOCKS DNS bootstrap method')
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shared.knownNodes[1][shared.Peer(ip, port)] = time.time()
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else:
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logger.info('DNS bootstrap skipped because the proxy type does not support DNS resolution.')
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@ -155,7 +155,7 @@ class socksocket(socket.socket):
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"""
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self.__proxy = (proxytype, addr, port, rdns, username, password)
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def __negotiatesocks5(self, destaddr, destport):
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def __negotiatesocks5(self):
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"""__negotiatesocks5(self,destaddr,destport)
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Negotiates a connection through a SOCKS5 server.
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"""
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@ -200,6 +200,8 @@ class socksocket(socket.socket):
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raise Socks5AuthError((2, _socks5autherrors[2]))
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else:
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raise GeneralProxyError((1, _generalerrors[1]))
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def __connectsocks5(self, destaddr, destport):
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# Now we can request the actual connection
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req = struct.pack('BBB', 0x05, 0x01, 0x00)
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# If the given destination address is an IP address, we'll
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@ -247,6 +249,37 @@ class socksocket(socket.socket):
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else:
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self.__proxypeername = (destaddr, destport)
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def __resolvesocks5(self, host):
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# Now we can request the actual connection
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req = struct.pack('BBB', 0x05, 0xF0, 0x00)
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req += chr(0x03).encode() + chr(len(host)).encode() + host
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req = req + struct.pack(">H", 8444)
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self.sendall(req)
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# Get the response
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ip = ""
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resp = self.__recvall(4)
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if resp[0:1] != chr(0x05).encode():
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self.close()
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raise GeneralProxyError((1, _generalerrors[1]))
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elif resp[1:2] != chr(0x00).encode():
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# Connection failed
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self.close()
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if ord(resp[1:2])<=8:
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raise Socks5Error((ord(resp[1:2]), _socks5errors[ord(resp[1:2])]))
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else:
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raise Socks5Error((9, _socks5errors[9]))
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# Get the bound address/port
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elif resp[3:4] == chr(0x01).encode():
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ip = socket.inet_ntoa(self.__recvall(4))
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elif resp[3:4] == chr(0x03).encode():
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resp = resp + self.recv(1)
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ip = self.__recvall(ord(resp[4:5]))
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else:
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self.close()
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raise GeneralProxyError((1,_generalerrors[1]))
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boundport = struct.unpack(">H", self.__recvall(2))[0]
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return ip
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def getproxysockname(self):
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"""getsockname() -> address info
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Returns the bound IP address and port number at the proxy.
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@ -361,7 +394,8 @@ class socksocket(socket.socket):
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else:
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portnum = 1080
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_orgsocket.connect(self, (self.__proxy[1], portnum))
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self.__negotiatesocks5(destpair[0], destpair[1])
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self.__negotiatesocks5()
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self.__connectsocks5(destpair[0], destpair[1])
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elif self.__proxy[0] == PROXY_TYPE_SOCKS4:
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if self.__proxy[2] != None:
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portnum = self.__proxy[2]
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@ -380,3 +414,15 @@ class socksocket(socket.socket):
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_orgsocket.connect(self, (destpair[0], destpair[1]))
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else:
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raise GeneralProxyError((4, _generalerrors[4]))
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def resolve(self, host):
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if self.__proxy[0] == PROXY_TYPE_SOCKS5:
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if self.__proxy[2] != None:
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portnum = self.__proxy[2]
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else:
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portnum = 1080
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_orgsocket.connect(self, (self.__proxy[1], portnum))
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self.__negotiatesocks5()
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return self.__resolvesocks5(host)
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else:
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return None
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