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oonibackend.py
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oonibackend.py
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# ooni backend
# ************
#
# This is the backend system responsible for running certain services that are
# useful for censorship detection.
#
# In here we start all the test helpers that are required by ooniprobe and
# start the report collector
from distutils.version import LooseVersion
from oonib.api import ooniBackend, ooniBouncer
from oonib.config import config
from oonib.onion import startTor
from oonib.testhelpers import dns_helpers, ssl_helpers
from oonib.testhelpers import http_helpers, tcp_helpers
import os
from twisted.application import internet, service
from twisted.internet import reactor
from twisted.names import dns
from txtorcon import TCPHiddenServiceEndpoint, TorConfig
from txtorcon import __version__ as txtorcon_version
if config.main.uid and config.main.gid:
application = service.Application('oonibackend', uid=config.main.uid,
gid=config.main.gid)
else:
application = service.Application('oonibackend')
multiService = service.MultiService()
if config.helpers['ssl'].port:
print "Starting SSL helper on %s" % config.helpers['ssl'].port
ssl_helper = internet.SSLServer(int(config.helpers['ssl'].port),
http_helpers.HTTPReturnJSONHeadersHelper(),
ssl_helpers.SSLContext(config))
multiService.addService(ssl_helper)
ssl_helper.startService()
# Start the DNS Server related services
if config.helpers['dns'].tcp_port:
print "Starting TCP DNS Helper on %s" % config.helpers['dns'].tcp_port
tcp_dns_helper = internet.TCPServer(int(config.helpers['dns'].tcp_port),
dns_helpers.DNSTestHelper())
multiService.addService(tcp_dns_helper)
tcp_dns_helper.startService()
if config.helpers['dns'].udp_port:
print "Starting UDP DNS Helper on %s" % config.helpers['dns'].udp_port
udp_dns_factory = dns.DNSDatagramProtocol(dns_helpers.DNSTestHelper())
udp_dns_helper = internet.UDPServer(int(config.helpers['dns'].udp_port),
udp_dns_factory)
multiService.addService(udp_dns_helper)
udp_dns_helper.startService()
if config.helpers['dns_discovery'].udp_port:
print ("Starting UDP DNS Discovery Helper on %s" %
config.helpers['dns_discovery'].udp_port)
udp_dns_discovery = internet.UDPServer(
int(config.helpers['dns_discovery'].udp_port),
dns.DNSDatagramProtocol(dns_helpers.DNSResolverDiscovery())
)
multiService.addService(udp_dns_discovery)
if config.helpers['dns_discovery'].tcp_port:
print ("Starting TCP DNS Discovery Helper on %s" %
config.helpers['dns_discovery'].tcp_port)
tcp_dns_discovery = internet.TCPServer(
int(config.helpers['dns_discovery'].tcp_port),
dns_helpers.DNSResolverDiscovery()
)
multiService.addService(tcp_dns_discovery)
tcp_dns_discovery.startService()
# XXX this needs to be ported
# Start the OONI daphn3 backend
if config.helpers['daphn3'].port:
print "Starting Daphn3 helper on %s" % config.helpers['daphn3'].port
daphn3_helper = internet.TCPServer(int(config.helpers['daphn3'].port),
tcp_helpers.Daphn3Server())
multiService.addService(daphn3_helper)
daphn3_helper.startService()
if config.helpers['tcp-echo'].port:
print "Starting TCP echo helper on %s" % config.helpers['tcp-echo'].port
tcp_echo_helper = internet.TCPServer(int(config.helpers['tcp-echo'].port),
tcp_helpers.TCPEchoHelper())
multiService.addService(tcp_echo_helper)
tcp_echo_helper.startService()
if config.helpers['http-return-json-headers'].port:
print ("Starting HTTP return request helper on %s" %
config.helpers['http-return-json-headers'].port)
http_return_request_helper = internet.TCPServer(
int(config.helpers['http-return-json-headers'].port),
http_helpers.HTTPReturnJSONHeadersHelper())
multiService.addService(http_return_request_helper)
http_return_request_helper.startService()
# add the tor collector service here
if config.main.tor_hidden_service:
torconfig = TorConfig()
d = startTor(torconfig)
def getHSEndpoint(data_dir):
if LooseVersion(txtorcon_version) >= LooseVersion('0.10.0'):
return TCPHiddenServiceEndpoint(reactor,
torconfig,
80,
hidden_service_dir=data_dir)
else:
return TCPHiddenServiceEndpoint(reactor,
torconfig,
80,
data_dir=data_dir)
def printOnionEndpoint(endpointService):
print ("Exposed %s Tor hidden service on httpo://%s" %
(endpointService.name, endpointService.endpoint.onion_uri))
def addCollector(torControlProtocol):
data_dir = os.path.join(torconfig.DataDirectory, 'collector')
collector_service = internet.StreamServerEndpointService(
getHSEndpoint(data_dir), ooniBackend
)
collector_service.setName('collector')
multiService.addService(collector_service)
collector_service.startService()
return collector_service
d.addCallback(addCollector)
d.addCallback(printOnionEndpoint)
if ooniBouncer:
def addBouncer(torControlProtocol):
data_dir = os.path.join(torconfig.DataDirectory, 'bouncer')
bouncer_service = internet.StreamServerEndpointService(
getHSEndpoint(data_dir), ooniBouncer
)
bouncer_service.setName('bouncer')
multiService.addService(bouncer_service)
bouncer_service.startService()
return bouncer_service
d.addCallback(addBouncer)
d.addCallback(printOnionEndpoint)
else:
if ooniBouncer:
bouncer_service = internet.TCPServer(8888, ooniBouncer,
interface="127.0.0.1")
multiService.addService(bouncer_service)
bouncer_service.startService()
collector_service = internet.TCPServer(8889, ooniBackend,
interface="127.0.0.1")
multiService.addService(collector_service)
collector_service.startService()