def launch_transport_listener(transport,
bindaddr,
role,
remote_addrport,
pt_config,
ext_or_cookie_file=None):
"""
Launch a listener for 'transport' in role 'role' (socks/client/server/ext_server).
If 'bindaddr' is set, then listen on bindaddr. Otherwise, listen
on an ephemeral port on localhost.
'remote_addrport' is the TCP/IP address of the other end of the
circuit. It's not used if we are in 'socks' role.
'pt_config' contains configuration options (such as the state location)
which are of interest to the pluggable transport.
'ext_or_cookie_file' is the filesystem path where the Extended
ORPort Authentication cookie is stored. It's only used in
'ext_server' mode.
Return a tuple (addr, port) representing where we managed to bind.
Throws obfsproxy.transports.transports.TransportNotFound if the
transport could not be found.
Throws twisted.internet.error.CannotListenError if the listener
could not be set up.
"""
transport_class = transports.get_transport_class(transport, role)
listen_host = bindaddr[0] if bindaddr else 'localhost'
listen_port = int(bindaddr[1]) if bindaddr else 0
if role == 'socks':
factory = socks.OBFSSOCKSv5Factory(transport_class, pt_config)
elif role == 'ext_server':
assert (remote_addrport and ext_or_cookie_file)
factory = extended_orport.ExtORPortServerFactory(
remote_addrport, ext_or_cookie_file, transport, transport_class,
pt_config)
else:
assert (remote_addrport)
factory = network.StaticDestinationServerFactory(
remote_addrport, role, transport_class, pt_config)
addrport = reactor.listenTCP(listen_port, factory, interface=listen_host)
return (addrport.getHost().host, addrport.getHost().port)
def launch_transport_listener(transport,
bindaddr,
role,
remote_addrport,
pt_config,
ext_or_cookie_file=None):
"""
Launch a listener for 'transport' in role 'role' (socks/client/server/ext_server).
If 'bindaddr' is set, then listen on bindaddr. Otherwise, listen
on an ephemeral port on localhost.
'remote_addrport' is the TCP/IP address of the other end of the
circuit. It's not used if we are in 'socks' role.
'pt_config' contains configuration options (such as the state location)
which are of interest to the pluggable transport.
'ext_or_cookie_file' is the filesystem path where the Extended
ORPort Authentication cookie is stored. It's only used in
'ext_server' mode.
Return a tuple (addr, port) representing where we managed to bind.
Throws obfsproxy.transports.transports.TransportNotFound if the
transport could not be found.
Throws twisted.internet.error.CannotListenError if the listener
could not be set up.
"""
listen_host = bindaddr[0] if bindaddr else 'localhost'
listen_port = int(bindaddr[1]) if bindaddr else 0
if role == 'socks':
transport_class = FTETransportClient
if hasattr(socks, "OBFSSOCKSv5Factory"):
# obfsproxy >= 0.2.7 provides SOCKS5.
factory = socks.OBFSSOCKSv5Factory(transport_class, pt_config)
pt_config.fte_client_socks_version = 5
elif hasattr(socks, "SOCKSv4Factory"):
# obfsproxy < 0.2.7 provides SOCKS4.
factory = socks.SOCKSv4Factory(transport_class, pt_config)
pt_config.fte_client_socks_version = 4
else:
# This will only happen if the obfsproxy people change the socks
# code again. This really is a dependency issue, so raise an
# ImportError.
raise ImportError(
"Failed to setup an obfsproxy SOCKS server factory")
elif role == 'ext_server':
assert (remote_addrport and ext_or_cookie_file)
transport_class = FTETransportServer
factory = extended_orport.ExtORPortServerFactory(
remote_addrport, ext_or_cookie_file, transport, transport_class,
pt_config)
elif role == 'client':
assert (remote_addrport)
transport_class = FTETransportClient
factory = network.StaticDestinationServerFactory(
remote_addrport, role, transport_class, pt_config)
elif role == 'server':
assert (remote_addrport)
transport_class = FTETransportServer
factory = network.StaticDestinationServerFactory(
remote_addrport, role, transport_class, pt_config)
else:
raise InvalidRoleException()
addrport = twisted.internet.reactor.listenTCP(listen_port,
factory,
interface=listen_host)
return (addrport.getHost().host, addrport.getHost().port)