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#!/usr/bin/python
#
# Copyright 2011 Nick Mathewson, Michael Stone
#
# You may do anything with this work that copyright law would normally
# restrict, so long as you retain the above notice(s) and this license
# in all redistributed copies and derived works. There is no warranty.
from __future__ import with_statement
import os
import signal
import subprocess
import sys
import re
import errno
import time
import chutney.Templating
def mkdir_p(d):
try:
os.makedirs(d)
except OSError, e:
if e.errno == errno.EEXIST:
return
raise
class Node:
########
# Users are expected to call these:
def __init__(self, parent=None, **kwargs):
self._parent = parent
self._fields = self._createEnviron(parent, kwargs)
def getN(self, N):
return [ Node(self) for i in xrange(N) ]
def specialize(self, **kwargs):
return Node(parent=self, **kwargs)
#######
# Users are NOT expected to call these:
def _getTorrcFname(self):
t = chutney.Templating.Template("${torrc_fname}")
return t.format(self._fields)
def _createTorrcFile(self, checkOnly=False):
template = self._getTorrcTemplate()
env = self._fields
fn_out = self._getTorrcFname()
output = template.format(env)
if checkOnly:
return
with open(fn_out, 'w') as f:
f.write(output)
def _getTorrcTemplate(self):
env = self._fields
template_path = env['torrc_template_path']
t = "$${include:$torrc}"
return chutney.Templating.Template(t, includePath=template_path)
def _getFreeVars(self):
template = self._getTorrcTemplate()
env = self._fields
return template.freevars(env)
def _createEnviron(self, parent, argdict):
if parent:
parentfields = parent._fields
else:
parentfields = self._getDefaultFields()
return TorEnviron(parentfields, **argdict)
def _getDefaultFields(self):
return _BASE_FIELDS
def _checkConfig(self, net):
self._createTorrcFile(checkOnly=True)
def _preConfig(self, net):
self._makeDataDir()
if self._fields['authority']:
self._genAuthorityKey()
if self._fields['relay']:
self._genRouterKey()
def _config(self, net):
self._createTorrcFile()
#self._createScripts()
def _postConfig(self, net):
#self.net.addNode(self)
pass
def _setnodenum(self, num):
self._fields['nodenum'] = num
def _makeDataDir(self):
env = self._fields
datadir = env['dir']
mkdir_p(os.path.join(datadir, 'keys'))
def _genAuthorityKey(self):
env = self._fields
datadir = env['dir']
tor_gencert = env['tor_gencert']
lifetime = env['auth_cert_lifetime']
idfile = os.path.join(datadir,'keys',"authority_identity_key")
skfile = os.path.join(datadir,'keys',"authority_signing_key")
certfile = os.path.join(datadir,'keys',"authority_certificate")
addr = "%s:%s" % (env['ip'], env['dirport'])
passphrase = env['auth_passphrase']
if all(os.path.exists(f) for f in [idfile, skfile, certfile]):
return
cmdline = [
tor_gencert,
'--create-identity-key',
'--passphrase-fd', '0',
'-i', idfile,
'-s', skfile,
'-c', certfile,
'-m', str(lifetime),
'-a', addr]
print "Creating identity key %s for %s with %s"%(idfile,env['nick']," ".join(cmdline))
p = subprocess.Popen(cmdline, stdin=subprocess.PIPE)
p.communicate(passphrase+"\n")
assert p.returncode == 0 #XXXX BAD!
def _genRouterKey(self):
env = self._fields
datadir = env['dir']
tor = env['tor']
idfile = os.path.join(datadir,'keys',"identity_key")
cmdline = [
tor,
"--quiet",
"--list-fingerprint",
"--orport", "1",
"--dirserver",
"xyzzy 127.0.0.1:1 ffffffffffffffffffffffffffffffffffffffff",
"--datadirectory", datadir ]
p = subprocess.Popen(cmdline, stdout=subprocess.PIPE)
stdout, stderr = p.communicate()
fingerprint = "".join(stdout.split()[1:])
assert re.match(r'^[A-F0-9]{40}$', fingerprint)
env['fingerprint'] = fingerprint
def _getDirServerLine(self):
env = self._fields
if not env['authority']:
return ""
datadir = env['dir']
certfile = os.path.join(datadir,'keys',"authority_certificate")
v3id = None
with open(certfile, 'r') as f:
for line in f:
if line.startswith("fingerprint"):
v3id = line.split()[1].strip()
break
assert v3id is not None
return "DirServer %s v3ident=%s orport=%s %s %s:%s %s\n" %(
env['nick'], v3id, env['orport'], env['dirserver_flags'],
env['ip'], env['dirport'], env['fingerprint'])
##### Controlling a node. This should probably get split into its
# own class. XXXX
def getPid(self):
env = self._fields
pidfile = os.path.join(env['dir'], 'pid')
if not os.path.exists(pidfile):
return None
with open(pidfile, 'r') as f:
return int(f.read())
def isRunning(self, pid=None):
env = self._fields
if pid is None:
pid = self.getPid()
if pid is None:
return False
try:
os.kill(pid, 0) # "kill 0" == "are you there?"
except OSError, e:
if e.errno == errno.ESRCH:
return False
raise
# okay, so the process exists. Say "True" for now.
# XXXX check if this is really tor!
return True
def check(self, listRunning=True, listNonRunning=False):
env = self._fields
pid = self.getPid()
running = self.isRunning(pid)
name = env['nick']
dir = env['dir']
if running:
if listRunning:
print "%s is running with PID %s"%(name,pid)
return True
elif os.path.exists(os.path.join(dir, "core.%s"%pid)):
if listNonRunning:
print "%s seems to have crashed, and left core file core.%s"%(
nick,pid)
return False
else:
if listNonRunning:
print "%s is stopped"%nick
return False
def hup(self):
pid = self.getPid()
running = self.isRunning()
nick = self._fields['nick']
if self.isRunning():
print "Sending sighup to %s"%nick
os.kill(pid, signal.SIGHUP)
return True
else:
print "%s is not running"%nick
return False
def start(self):
if self.isRunning():
print "%s is already running"
return
torrc = self._getTorrcFname()
cmdline = [
self._fields['tor'],
"--quiet",
"-f", torrc,
]
p = subprocess.Popen(cmdline)
# XXXX this requires that RunAsDaemon is set.
p.wait()
if p.returncode != 0:
print "Couldn't launch %s (%s): %s"%(self._fields['nick'],
" ".join(cmdline),
p.returncode)
return False
return True
def stop(self, sig=signal.SIGINT):
env = self._fields
pid = self.getPid()
if not self.isRunning(pid):
print "%s is not running"%env['nick']
return
os.kill(pid, sig)
DEFAULTS = {
'authority' : False,
'relay' : False,
'connlimit' : 60,
'net_base_dir' : 'net',
'tor' : 'tor',
'auth_cert_lifetime' : 12,
'ip' : '127.0.0.1',
'dirserver_flags' : 'no-v2',
'privnet_dir' : '.',
'torrc_fname' : '${dir}/torrc',
'orport_base' : 6000,
'dirport_base' : 7000,
'controlport_base' : 8000,
'socksport_base' : 9000,
'dirservers' : "Dirserver bleargh bad torrc file!",
'core' : True,
}
class TorEnviron(chutney.Templating.Environ):
def __init__(self,parent=None,**kwargs):
chutney.Templating.Environ.__init__(self, parent=parent, **kwargs)
def _get_orport(self, me):
return me['orport_base']+me['nodenum']
def _get_controlport(self, me):
return me['controlport_base']+me['nodenum']
def _get_socksport(self, me):
return me['socksport_base']+me['nodenum']
def _get_dirport(self, me):
return me['dirport_base']+me['nodenum']
def _get_dir(self, me):
return os.path.abspath(os.path.join(me['net_base_dir'],
"nodes",
"%03d%s"%(me['nodenum'], me['tag'])))
def _get_nick(self, me):
return "test%03d%s"%(me['nodenum'], me['tag'])
def _get_tor_gencert(self, me):
return me['tor']+"-gencert"
def _get_auth_passphrase(self, me):
return self['nick'] # OMG TEH SECURE!
def _get_torrc_template_path(self, me):
return [ os.path.join(me['privnet_dir'], 'torrc_templates') ]
class Network:
def __init__(self,defaultEnviron):
self._nodes = []
self._dfltEnv = defaultEnviron
self._nextnodenum = 0
def _addNode(self, n):
n._setnodenum(self._nextnodenum)
self._nextnodenum += 1
self._nodes.append(n)
def _checkConfig(self):
for n in self._nodes:
n._checkConfig(self)
def configure(self):
network = self
dirserverlines = []
self._checkConfig()
# XXX don't change node names or types or count if anything is
# XXX running!
for n in self._nodes:
n._preConfig(network)
dirserverlines.append(n._getDirServerLine())
self._dfltEnv['dirservers'] = "".join(dirserverlines)
for n in self._nodes:
n._config(network)
for n in self._nodes:
n._postConfig(network)
def status(self):
statuses = [n.check() for n in self._nodes]
n_ok = len([x for x in statuses if x])
print "%d/%d nodes are running"%(n_ok,len(self._nodes))
def restart(self):
self.stop()
self.start()
def start(self):
print "Starting nodes"
return all([n.start() for n in self._nodes])
def hup(self):
print "Sending SIGHUP to nodes"
return all([n.hup() for n in self._nodes])
def stop(self):
for sig, desc in [(signal.SIGINT, "SIGINT"),
(signal.SIGINT, "another SIGINT"),
(signal.SIGKILL, "SIGKILL")]:
print "Sending %s to nodes"%desc
for n in self._nodes:
if n.isRunning():
n.stop(sig=sig)
print "Waiting for nodes to finish."
for n in xrange(15):
time.sleep(1)
if all(not n.isRunning() for n in self._nodes):
return
sys.stdout.write(".")
sys.stdout.flush()
for n in self._nodes:
n.check(listNonRunning=False)
def ConfigureNodes(nodelist):
network = _THE_NETWORK
for n in nodelist:
network._addNode(n)
def runConfigFile(verb, f):
global _BASE_FIELDS
global _THE_NETWORK
_BASE_FIELDS = TorEnviron(chutney.Templating.Environ(**DEFAULTS))
_THE_NETWORK = Network(_BASE_FIELDS)
_GLOBALS = dict(_BASE_FIELDS= _BASE_FIELDS,
Node=Node,
ConfigureNodes=ConfigureNodes,
_THE_NETWORK=_THE_NETWORK)
exec f in _GLOBALS
network = _GLOBALS['_THE_NETWORK']
if not hasattr(network, verb):
print "I don't know how to %s. Known commands are: %s" % (
verb, " ".join(x for x in dir(network) if not x.startswith("_")))
return
getattr(network,verb)()
if __name__ == '__main__':
if len(sys.argv) < 3:
print "Syntax: chutney {command} {networkfile}"
sys.exit(1)
f = open(sys.argv[2])
runConfigFile(sys.argv[1], f)
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