#!/usr/bin/python # Copyright 2005-2006 Nick Mathewson # See the LICENSE file in the Tor distribution for licensing information. """ exitlist -- Given a Tor directory on stdin, lists the Tor servers that accept connections to given addreses. example usage (Tor 0.1.0.16 and earlier): python2.2 exitlist < ~/.tor/cached-directory example usage (Tor 0.1.1.10-alpha and later): python2.2 exitlist < ~/.tor/cached-routers* """ # Requires Python 2.2 or later. # # Change this to True if you want more verbose output. By default, we # only print the IPs of the servers that accept any the listed # addresses, one per line. # VERBOSE = False # # Change this to True if you want to reverse the output, and list the # servers that accept *none* of the listed addresses. # INVERSE = False # # Change this list to contain all of the target services you are interested # in. It must contain one entry per line, each consisting of an IPv4 address, # a colon, and a port number. # ADDRESSES_OF_INTEREST = """ 192.168.0.1:80 """ # # YOU DO NOT NEED TO EDIT AFTER THIS POINT. # import sys import re import getopt import socket import struct assert sys.version_info >= (2,2) def maskIP(ip,mask): return "".join([chr(ord(a) & ord(b)) for a,b in zip(ip,mask)]) def maskFromLong(lng): return struct.pack("!L", lng) def maskByBits(n): return maskFromLong(0xffffffffl ^ ((1L<<(32-n))-1)) class Pattern: """ >>> import socket >>> ip1 = socket.inet_aton("192.169.64.11") >>> ip2 = socket.inet_aton("192.168.64.11") >>> ip3 = socket.inet_aton("18.244.0.188") >>> print Pattern.parse("18.244.0.188") 18.244.0.188/255.255.255.255:1-65535 >>> print Pattern.parse("18.244.0.188/16:*") 18.244.0.0/255.255.0.0:1-65535 >>> print Pattern.parse("18.244.0.188/2.2.2.2:80") 2.0.0.0/2.2.2.2:80-80 >>> print Pattern.parse("192.168.0.1/255.255.00.0:22-25") 192.168.0.0/255.255.0.0:22-25 >>> p1 = Pattern.parse("192.168.0.1/255.255.00.0:22-25") >>> import socket >>> p1.appliesTo(ip1, 22) False >>> p1.appliesTo(ip2, 22) True >>> p1.appliesTo(ip2, 25) True >>> p1.appliesTo(ip2, 26) False """ def __init__(self, ip, mask, portMin, portMax): self.ip = maskIP(ip,mask) self.mask = mask self.portMin = portMin self.portMax = portMax def __str__(self): return "%s/%s:%s-%s"%(socket.inet_ntoa(self.ip), socket.inet_ntoa(self.mask), self.portMin, self.portMax) def parse(s): if ":" in s: addrspec, portspec = s.split(":",1) else: addrspec, portspec = s, "*" if addrspec == '*': ip,mask = "\x00\x00\x00\x00","\x00\x00\x00\x00" elif '/' not in addrspec: ip = socket.inet_aton(addrspec) mask = "\xff\xff\xff\xff" else: ip,mask = addrspec.split("/",1) ip = socket.inet_aton(ip) if "." in mask: mask = socket.inet_aton(mask) else: mask = maskByBits(int(mask)) if portspec == '*': portMin = 1 portMax = 65535 elif '-' not in portspec: portMin = portMax = int(portspec) else: portMin, portMax = map(int,portspec.split("-",1)) return Pattern(ip,mask,portMin,portMax) parse = staticmethod(parse) def appliesTo(self, ip, port): return ((maskIP(ip,self.mask) == self.ip) and (self.portMin <= port <= self.portMax)) class Policy: """ >>> import socket >>> ip1 = socket.inet_aton("192.169.64.11") >>> ip2 = socket.inet_aton("192.168.64.11") >>> ip3 = socket.inet_aton("18.244.0.188") >>> pol = Policy.parseLines(["reject *:80","accept 18.244.0.188:*"]) >>> print str(pol).strip() reject 0.0.0.0/0.0.0.0:80-80 accept 18.244.0.188/255.255.255.255:1-65535 >>> pol.accepts(ip1,80) False >>> pol.accepts(ip3,80) False >>> pol.accepts(ip3,81) True """ def __init__(self, lst): self.lst = lst def parseLines(lines): r = [] for item in lines: a,p=item.split(" ",1) if a == 'accept': a = True elif a == 'reject': a = False else: raise ValueError("Unrecognized action %r",a) p = Pattern.parse(p) r.append((p,a)) return Policy(r) parseLines = staticmethod(parseLines) def __str__(self): r = [] for pat, accept in self.lst: rule = accept and "accept" or "reject" r.append("%s %s\n"%(rule,pat)) return "".join(r) def accepts(self, ip, port): for pattern,accept in self.lst: if pattern.appliesTo(ip,port): return accept return True class Server: def __init__(self, name, ip, policy): self.name = name self.ip = ip self.policy = policy def run(): servers = [] policy = [] name = ip = None for line in sys.stdin.xreadlines(): if line.startswith('router '): if name: servers.append(Server(name, ip, Policy.parseLines(policy))) _, name, ip, rest = line.split(" ", 3) policy = [] elif line.startswith('accept ') or line.startswith('reject '): policy.append(line.strip()) if name: servers.append(Server(name, ip, Policy.parseLines(policy))) targets = [] for line in ADDRESSES_OF_INTEREST.split("\n"): line = line.strip() if not line: continue p = Pattern.parse(line) targets.append((p.ip, p.portMin)) accepters, rejecters = [], [] for s in servers: for ip,port in targets: if s.policy.accepts(ip,port): accepters.append(s) break else: rejecters.append(s) if INVERSE: printlist = rejecters else: printlist = accepters if VERBOSE: for s in printlist: print "%s\t%s"%(s.ip,s.name) else: for s in printlist: print s.ip def _test(): import doctest, exitparse return doctest.testmod(exitparse) #_test() run()