diff options
Diffstat (limited to 'src/leap/eip')
| -rw-r--r-- | src/leap/eip/config.py | 2 | ||||
| -rw-r--r-- | src/leap/eip/eipconnection.py | 238 | ||||
| -rw-r--r-- | src/leap/eip/openvpnconnection.py | 472 | ||||
| -rw-r--r-- | src/leap/eip/tests/test_eipconnection.py | 9 |
4 files changed, 355 insertions, 366 deletions
diff --git a/src/leap/eip/config.py b/src/leap/eip/config.py index 42c00380..8e687bda 100644 --- a/src/leap/eip/config.py +++ b/src/leap/eip/config.py @@ -53,7 +53,7 @@ def get_socket_path(): socket_path = os.path.join( tempfile.mkdtemp(prefix="leap-tmp"), 'openvpn.socket') - logger.debug('socket path: %s', socket_path) + #logger.debug('socket path: %s', socket_path) return socket_path diff --git a/src/leap/eip/eipconnection.py b/src/leap/eip/eipconnection.py index 7828c864..8751f643 100644 --- a/src/leap/eip/eipconnection.py +++ b/src/leap/eip/eipconnection.py @@ -5,6 +5,7 @@ from __future__ import (absolute_import,) import logging import Queue import sys +import time from leap.eip.checks import ProviderCertChecker from leap.eip.checks import EIPConfigChecker @@ -15,20 +16,143 @@ from leap.eip.openvpnconnection import OpenVPNConnection logger = logging.getLogger(name=__name__) -class EIPConnection(OpenVPNConnection): +class StatusMixIn(object): + + # a bunch of methods related with querying the connection + # state/status and displaying useful info. + # Needs to get clear on what is what, and + # separate functions. + # Should separate EIPConnectionStatus (self.status) + # from the OpenVPN state/status command and parsing. + + def connection_state(self): + """ + returns the current connection state + """ + return self.status.current + + def get_icon_name(self): + """ + get icon name from status object + """ + return self.status.get_state_icon() + + def get_leap_status(self): + return self.status.get_leap_status() + + def poll_connection_state(self): + """ + """ + try: + state = self.get_connection_state() + except eip_exceptions.ConnectionRefusedError: + # connection refused. might be not ready yet. + logger.warning('connection refused') + return + if not state: + logger.debug('no state') + return + (ts, status_step, + ok, ip, remote) = state + self.status.set_vpn_state(status_step) + status_step = self.status.get_readable_status() + return (ts, status_step, ok, ip, remote) + + def make_error(self): + """ + capture error and wrap it in an + understandable format + """ + # mostly a hack to display errors in the debug UI + # w/o breaking the polling. + #XXX get helpful error codes + self.with_errors = True + now = int(time.time()) + return '%s,LAUNCHER ERROR,ERROR,-,-' % now + + def state(self): + """ + Sends OpenVPN command: state + """ + state = self._send_command("state") + if not state: + return None + if isinstance(state, str): + return state + if isinstance(state, list): + if len(state) == 1: + return state[0] + else: + return state[-1] + + def vpn_status(self): + """ + OpenVPN command: status + """ + status = self._send_command("status") + return status + + def vpn_status2(self): + """ + OpenVPN command: last 2 statuses + """ + return self._send_command("status 2") + + # + # parse info as the UI expects + # + + def get_status_io(self): + status = self.vpn_status() + if isinstance(status, str): + lines = status.split('\n') + if isinstance(status, list): + lines = status + try: + (header, when, tun_read, tun_write, + tcp_read, tcp_write, auth_read) = tuple(lines) + except ValueError: + return None + + # XXX this will break with different locales I assume... + when_ts = time.strptime(when.split(',')[1], "%a %b %d %H:%M:%S %Y") + sep = ',' + # XXX clean up this! + tun_read = tun_read.split(sep)[1] + tun_write = tun_write.split(sep)[1] + tcp_read = tcp_read.split(sep)[1] + tcp_write = tcp_write.split(sep)[1] + auth_read = auth_read.split(sep)[1] + + # XXX this could be a named tuple. prettier. + return when_ts, (tun_read, tun_write, tcp_read, tcp_write, auth_read) + + def get_connection_state(self): + state = self.state() + if state is not None: + ts, status_step, ok, ip, remote = state.split(',') + ts = time.gmtime(float(ts)) + # XXX this could be a named tuple. prettier. + return ts, status_step, ok, ip, remote + + +class EIPConnection(OpenVPNConnection, StatusMixIn): """ + Aka conductor. Manages the execution of the OpenVPN process, auto starts, monitors the network connection, handles configuration, fixes leaky hosts, handles errors, etc. Status updates (connected, bandwidth, etc) are signaled to the GUI. """ + # XXX change name to EIPConductor ?? + def __init__(self, provider_cert_checker=ProviderCertChecker, config_checker=EIPConfigChecker, *args, **kwargs): - self.settingsfile = kwargs.get('settingsfile', None) - self.logfile = kwargs.get('logfile', None) + #self.settingsfile = kwargs.get('settingsfile', None) + #self.logfile = kwargs.get('logfile', None) self.provider = kwargs.pop('provider', None) self._providercertchecker = provider_cert_checker self._configchecker = config_checker @@ -48,11 +172,27 @@ class EIPConnection(OpenVPNConnection): super(EIPConnection, self).__init__(*args, **kwargs) + def connect(self): + """ + entry point for connection process + """ + # in OpenVPNConnection + self.try_openvpn_connection() + + def disconnect(self, shutdown=False): + """ + disconnects client + """ + self.terminate_openvpn_connection(shutdown=shutdown) + self.status.change_to(self.status.DISCONNECTED) + def has_errors(self): return True if self.error_queue.qsize() != 0 else False def init_checkers(self): - # initialize checkers + """ + initialize checkers + """ self.provider_cert_checker = self._providercertchecker( domain=self.provider) self.config_checker = self._configchecker(domain=self.provider) @@ -101,96 +241,6 @@ class EIPConnection(OpenVPNConnection): except Exception as exc: push_err(exc) - def connect(self): - """ - entry point for connection process - """ - #self.forget_errors() - self._try_connection() - - def disconnect(self): - """ - disconnects client - """ - self.cleanup() - logger.debug("disconnect: clicked.") - self.status.change_to(self.status.DISCONNECTED) - - #def shutdown(self): - #""" - #shutdown and quit - #""" - #self.desired_con_state = self.status.DISCONNECTED - - def connection_state(self): - """ - returns the current connection state - """ - return self.status.current - - def poll_connection_state(self): - """ - """ - try: - state = self.get_connection_state() - except eip_exceptions.ConnectionRefusedError: - # connection refused. might be not ready yet. - logger.warning('connection refused') - return - if not state: - logger.debug('no state') - return - (ts, status_step, - ok, ip, remote) = state - self.status.set_vpn_state(status_step) - status_step = self.status.get_readable_status() - return (ts, status_step, ok, ip, remote) - - def get_icon_name(self): - """ - get icon name from status object - """ - return self.status.get_state_icon() - - def get_leap_status(self): - return self.status.get_leap_status() - - # - # private methods - # - - #def _disconnect(self): - # """ - # private method for disconnecting - # """ - # if self.subp is not None: - # logger.debug('disconnecting...') - # self.subp.terminate() - # self.subp = None - - #def _is_alive(self): - #""" - #don't know yet - #""" - #pass - - def _connect(self): - """ - entry point for connection cascade methods. - """ - try: - conn_result = self._try_connection() - except eip_exceptions.UnrecoverableError as except_msg: - logger.error("FATAL: %s" % unicode(except_msg)) - conn_result = self.status.UNRECOVERABLE - - # XXX enqueue exceptions themselves instead? - except Exception as except_msg: - self.error_queue.append(except_msg) - logger.error("Failed Connection: %s" % - unicode(except_msg)) - return conn_result - class EIPConnectionStatus(object): """ diff --git a/src/leap/eip/openvpnconnection.py b/src/leap/eip/openvpnconnection.py index 07bc628a..253f5056 100644 --- a/src/leap/eip/openvpnconnection.py +++ b/src/leap/eip/openvpnconnection.py @@ -7,7 +7,6 @@ import os import psutil import shutil import socket -import time from functools import partial logger = logging.getLogger(name=__name__) @@ -20,12 +19,123 @@ from leap.eip import config as eip_config from leap.eip import exceptions as eip_exceptions -class OpenVPNConnection(Connection): +class OpenVPNManagement(object): + + # TODO explain a little bit how management interface works + # and our telnet interface with support for unix sockets. + + """ + for more information, read openvpn management notes. + zcat `dpkg -L openvpn | grep management` + """ + + def _connect_to_management(self): + """ + Connect to openvpn management interface + """ + if hasattr(self, 'tn'): + self._close_management_socket() + self.tn = UDSTelnet(self.host, self.port) + + # XXX make password optional + # specially for win. we should generate + # the pass on the fly when invoking manager + # from conductor + + #self.tn.read_until('ENTER PASSWORD:', 2) + #self.tn.write(self.password + '\n') + #self.tn.read_until('SUCCESS:', 2) + if self.tn: + self._seek_to_eof() + return True + + def _close_management_socket(self, announce=True): + """ + Close connection to openvpn management interface + """ + logger.debug('closing socket') + if announce: + self.tn.write("quit\n") + self.tn.read_all() + self.tn.get_socket().close() + del self.tn + + def _seek_to_eof(self): + """ + Read as much as available. Position seek pointer to end of stream + """ + try: + b = self.tn.read_eager() + except EOFError: + logger.debug("Could not read from socket. Assuming it died.") + return + while b: + try: + b = self.tn.read_eager() + except EOFError: + logger.debug("Could not read from socket. Assuming it died.") + + def _send_command(self, cmd): + """ + Send a command to openvpn and return response as list + """ + if not self.connected(): + try: + self._connect_to_management() + except eip_exceptions.MissingSocketError: + logger.warning('missing management socket') + return [] + try: + if hasattr(self, 'tn'): + self.tn.write(cmd + "\n") + except socket.error: + logger.error('socket error') + self._close_management_socket(announce=False) + return [] + buf = self.tn.read_until(b"END", 2) + self._seek_to_eof() + blist = buf.split('\r\n') + if blist[-1].startswith('END'): + del blist[-1] + return blist + else: + return [] + + def _send_short_command(self, cmd): + """ + parse output from commands that are + delimited by "success" instead + """ + if not self.connected(): + self.connect() + self.tn.write(cmd + "\n") + # XXX not working? + buf = self.tn.read_until(b"SUCCESS", 2) + self._seek_to_eof() + blist = buf.split('\r\n') + return blist + + # + # random maybe useful vpn commands + # + + def pid(self): + #XXX broken + return self._send_short_command("pid") + + +class OpenVPNConnection(Connection, OpenVPNManagement): """ All related to invocation - of the openvpn binary + of the openvpn binary. + It's extended by EIPConnection. """ + # XXX Inheriting from Connection was an early design idea + # but currently that's an empty class. + # We can get rid of that if we don't use it for sharing + # state with other leap modules. + def __init__(self, watcher_cb=None, debug=False, @@ -34,24 +144,21 @@ class OpenVPNConnection(Connection): password=None, *args, **kwargs): """ - :param config_file: configuration file to read from :param watcher_cb: callback to be \ called for each line in watched stdout :param signal_map: dictionary of signal names and callables \ to be triggered for each one of them. - :type config_file: str :type watcher_cb: function :type signal_map: dict """ #XXX FIXME #change watcher_cb to line_observer + # XXX if not host: raise ImproperlyConfigured logger.debug('init openvpn connection') self.debug = debug - # XXX if not host: raise ImproperlyConfigured self.ovpn_verbosity = kwargs.get('ovpn_verbosity', None) - #self.config_file = config_file self.watcher_cb = watcher_cb #self.signal_maps = signal_maps @@ -62,21 +169,13 @@ to be triggered for each one of them. self.port = None self.proto = None - #XXX workaround for signaling - #the ui that we don't know how to - #manage a connection error - #self.with_errors = False - self.command = None self.args = None # XXX get autostart from config self.autostart = True - # - # management init methods - # - + # management interface init self.host = host if isinstance(port, str) and port.isdigit(): port = int(port) @@ -88,101 +187,47 @@ to be triggered for each one of them. self.password = password def run_openvpn_checks(self): + """ + runs check needed before launching + openvpn subprocess. will raise if errors found. + """ logger.debug('running openvpn checks') + # XXX I think that "check_if_running" should be called + # from try openvpn connection instead. -- kali. + # let's prepare tests for that before changing it... self._check_if_running_instance() self._set_ovpn_command() self._check_vpn_keys() - def _set_ovpn_command(self): - # XXX check also for command-line --command flag - try: - command, args = eip_config.build_ovpn_command( - provider=self.provider, - debug=self.debug, - socket_path=self.host, - ovpn_verbosity=self.ovpn_verbosity) - except eip_exceptions.EIPNoPolkitAuthAgentAvailable: - command = args = None - raise - except eip_exceptions.EIPNoPkexecAvailable: - command = args = None - raise - - # XXX if not command, signal error. - self.command = command - self.args = args - - def _check_vpn_keys(self): - """ - checks for correct permissions on vpn keys - """ - try: - eip_config.check_vpn_keys(provider=self.provider) - except eip_exceptions.EIPInitBadKeyFilePermError: - logger.error('Bad VPN Keys permission!') - # do nothing now - # and raise the rest ... - - def _launch_openvpn(self): - """ - invocation of openvpn binaries in a subprocess. - """ - #XXX TODO: - #deprecate watcher_cb, - #use _only_ signal_maps instead - - logger.debug('_launch_openvpn called') - if self.watcher_cb is not None: - linewrite_callback = self.watcher_cb - else: - #XXX get logger instead - linewrite_callback = lambda line: print('watcher: %s' % line) - - # the partial is not - # being applied now because we're not observing the process - # stdout like we did in the early stages. but I leave it - # here since it will be handy for observing patterns in the - # thru-the-manager updates (with regex) - observers = (linewrite_callback, - partial(lambda con_status, line: None, self.status)) - subp, watcher = spawn_and_watch_process( - self.command, - self.args, - observers=observers) - self.subp = subp - self.watcher = watcher - - def _try_connection(self): + def try_openvpn_connection(self): """ attempts to connect """ + # XXX should make public method if self.command is None: raise eip_exceptions.EIPNoCommandError if self.subp is not None: logger.debug('cowardly refusing to launch subprocess again') + # XXX this is not returning ???!! + # FIXME -- so it's calling it all the same!! self._launch_openvpn() - def _check_if_running_instance(self): + def connected(self): """ - check if openvpn is already running + Returns True if connected + rtype: bool """ - for process in psutil.get_process_list(): - if process.name == "openvpn": - logger.debug('an openvpn instance is already running.') - logger.debug('attempting to stop openvpn instance.') - if not self._stop(): - raise eip_exceptions.OpenVPNAlreadyRunning - - logger.debug('no openvpn instance found.') + # XXX make a property + return hasattr(self, 'tn') - def cleanup(self, shutdown=False): + def terminate_openvpn_connection(self, shutdown=False): """ terminates openvpn child subprocess """ if self.subp: try: - self._stop() + self._stop_openvpn() except eip_exceptions.ConnectionRefusedError: logger.warning( 'unable to send sigterm signal to openvpn: ' @@ -202,9 +247,9 @@ to be triggered for each one of them. '(We might have left openvpn running)' % RETCODE) if shutdown: - self.cleanup_tempfiles() + self._cleanup_tempfiles() - def cleanup_tempfiles(self): + def _cleanup_tempfiles(self): """ remove all temporal files we might have left behind @@ -224,172 +269,89 @@ to be triggered for each one of them. except OSError: logger.error('could not delete tmpfolder %s' % tempfolder) - def _get_openvpn_process(self): - # plist = [p for p in psutil.get_process_list() if p.name == "openvpn"] - # return plist[0] if plist else None + # checks + + def _check_if_running_instance(self): + """ + check if openvpn is already running + """ for process in psutil.get_process_list(): if process.name == "openvpn": - return process - return None - - # management methods - # - # XXX REVIEW-ME - # REFACTOR INFO: (former "manager". - # Can we move to another - # base class to test independently?) - # - - #def forget_errors(self): - #logger.debug('forgetting errors') - #self.with_errors = False - - def connect_to_management(self): - """Connect to openvpn management interface""" - #logger.debug('connecting socket') - if hasattr(self, 'tn'): - self.close() - self.tn = UDSTelnet(self.host, self.port) - - # XXX make password optional - # specially for win. we should generate - # the pass on the fly when invoking manager - # from conductor + logger.debug('an openvpn instance is already running.') + logger.debug('attempting to stop openvpn instance.') + if not self._stop_openvpn(): + raise eip_exceptions.OpenVPNAlreadyRunning - #self.tn.read_until('ENTER PASSWORD:', 2) - #self.tn.write(self.password + '\n') - #self.tn.read_until('SUCCESS:', 2) - if self.tn: - self._seek_to_eof() - return True + logger.debug('no openvpn instance found.') - def _seek_to_eof(self): - """ - Read as much as available. Position seek pointer to end of stream - """ + def _set_ovpn_command(self): try: - b = self.tn.read_eager() - except EOFError: - logger.debug("Could not read from socket. Assuming it died.") - return - while b: - try: - b = self.tn.read_eager() - except EOFError: - logger.debug("Could not read from socket. Assuming it died.") - - def connected(self): - """ - Returns True if connected - rtype: bool - """ - return hasattr(self, 'tn') + command, args = eip_config.build_ovpn_command( + provider=self.provider, + debug=self.debug, + socket_path=self.host, + ovpn_verbosity=self.ovpn_verbosity) + except eip_exceptions.EIPNoPolkitAuthAgentAvailable: + command = args = None + raise + except eip_exceptions.EIPNoPkexecAvailable: + command = args = None + raise - def close(self, announce=True): - """ - Close connection to openvpn management interface - """ - logger.debug('closing socket') - if announce: - self.tn.write("quit\n") - self.tn.read_all() - self.tn.get_socket().close() - del self.tn + # XXX if not command, signal error. + self.command = command + self.args = args - def _send_command(self, cmd): + def _check_vpn_keys(self): """ - Send a command to openvpn and return response as list + checks for correct permissions on vpn keys """ - if not self.connected(): - try: - self.connect_to_management() - except eip_exceptions.MissingSocketError: - logger.warning('missing management socket') - return [] try: - if hasattr(self, 'tn'): - self.tn.write(cmd + "\n") - except socket.error: - logger.error('socket error') - self.close(announce=False) - return [] - buf = self.tn.read_until(b"END", 2) - self._seek_to_eof() - blist = buf.split('\r\n') - if blist[-1].startswith('END'): - del blist[-1] - return blist - else: - return [] - - def _send_short_command(self, cmd): - """ - parse output from commands that are - delimited by "success" instead - """ - if not self.connected(): - self.connect() - self.tn.write(cmd + "\n") - # XXX not working? - buf = self.tn.read_until(b"SUCCESS", 2) - self._seek_to_eof() - blist = buf.split('\r\n') - return blist - - # - # useful vpn commands - # - - def pid(self): - #XXX broken - return self._send_short_command("pid") + eip_config.check_vpn_keys(provider=self.provider) + except eip_exceptions.EIPInitBadKeyFilePermError: + logger.error('Bad VPN Keys permission!') + # do nothing now + # and raise the rest ... - def make_error(self): - """ - capture error and wrap it in an - understandable format - """ - #XXX get helpful error codes - self.with_errors = True - now = int(time.time()) - return '%s,LAUNCHER ERROR,ERROR,-,-' % now + # starting and stopping openvpn subprocess - def state(self): + def _launch_openvpn(self): """ - OpenVPN command: state + invocation of openvpn binaries in a subprocess. """ - state = self._send_command("state") - if not state: - return None - if isinstance(state, str): - return state - if isinstance(state, list): - if len(state) == 1: - return state[0] - else: - return state[-1] + #XXX TODO: + #deprecate watcher_cb, + #use _only_ signal_maps instead - def vpn_status(self): - """ - OpenVPN command: status - """ - #logger.debug('status called') - status = self._send_command("status") - return status + logger.debug('_launch_openvpn called') + if self.watcher_cb is not None: + linewrite_callback = self.watcher_cb + else: + #XXX get logger instead + linewrite_callback = lambda line: print('watcher: %s' % line) - def vpn_status2(self): - """ - OpenVPN command: last 2 statuses - """ - return self._send_command("status 2") + # the partial is not + # being applied now because we're not observing the process + # stdout like we did in the early stages. but I leave it + # here since it will be handy for observing patterns in the + # thru-the-manager updates (with regex) + observers = (linewrite_callback, + partial(lambda con_status, line: None, self.status)) + subp, watcher = spawn_and_watch_process( + self.command, + self.args, + observers=observers) + self.subp = subp + self.watcher = watcher - def _stop(self): + def _stop_openvpn(self): """ stop openvpn process by sending SIGTERM to the management interface """ - logger.debug("disconnecting...") + # XXX method a bit too long, split + logger.debug("terminating openvpn process...") if self.connected(): try: self._send_command("signal SIGTERM\n") @@ -424,38 +386,10 @@ to be triggered for each one of them. return True - # - # parse info - # - - def get_status_io(self): - status = self.vpn_status() - if isinstance(status, str): - lines = status.split('\n') - if isinstance(status, list): - lines = status - try: - (header, when, tun_read, tun_write, - tcp_read, tcp_write, auth_read) = tuple(lines) - except ValueError: - return None - - when_ts = time.strptime(when.split(',')[1], "%a %b %d %H:%M:%S %Y") - sep = ',' - # XXX cleanup! - tun_read = tun_read.split(sep)[1] - tun_write = tun_write.split(sep)[1] - tcp_read = tcp_read.split(sep)[1] - tcp_write = tcp_write.split(sep)[1] - auth_read = auth_read.split(sep)[1] - - # XXX this could be a named tuple. prettier. - return when_ts, (tun_read, tun_write, tcp_read, tcp_write, auth_read) - - def get_connection_state(self): - state = self.state() - if state is not None: - ts, status_step, ok, ip, remote = state.split(',') - ts = time.gmtime(float(ts)) - # XXX this could be a named tuple. prettier. - return ts, status_step, ok, ip, remote + def _get_openvpn_process(self): + # plist = [p for p in psutil.get_process_list() if p.name == "openvpn"] + # return plist[0] if plist else None + for process in psutil.get_process_list(): + if process.name == "openvpn": + return process + return None diff --git a/src/leap/eip/tests/test_eipconnection.py b/src/leap/eip/tests/test_eipconnection.py index aefca36f..4ee5ae30 100644 --- a/src/leap/eip/tests/test_eipconnection.py +++ b/src/leap/eip/tests/test_eipconnection.py @@ -123,9 +123,14 @@ class EIPConductorTest(BaseLeapTest): self.con.status.CONNECTED) # disconnect - self.con.cleanup = Mock() + self.con.terminate_openvpn_connection = Mock() self.con.disconnect() - self.con.cleanup.assert_called_once_with() + self.con.terminate_openvpn_connection.assert_called_once_with( + shutdown=False) + self.con.terminate_openvpn_connection = Mock() + self.con.disconnect(shutdown=True) + self.con.terminate_openvpn_connection.assert_called_once_with( + shutdown=True) # new status should be disconnected # XXX this should evolve and check no errors |