Package flumotion :: Package component :: Package bouncers :: Package algorithms :: Module ipbouncer
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Source Code for Module flumotion.component.bouncers.algorithms.ipbouncer

 1  # -*- Mode: Python; test-case-name: flumotion.test.test_bouncers_ipbouncer -*- 
 2  # vi:si:et:sw=4:sts=4:ts=4 
 3  # 
 4  # Flumotion - a streaming media server 
 5  # Copyright (C) 2004,2005,2006,2007 Fluendo, S.L. (www.fluendo.com). 
 6  # All rights reserved. 
 7   
 8  # This file may be distributed and/or modified under the terms of 
 9  # the GNU General Public License version 2 as published by 
10  # the Free Software Foundation. 
11  # This file is distributed without any warranty; without even the implied 
12  # warranty of merchantability or fitness for a particular purpose. 
13  # See "LICENSE.GPL" in the source distribution for more information. 
14   
15  # Licensees having purchased or holding a valid Flumotion Advanced 
16  # Streaming Server license may use this file in accordance with the 
17  # Flumotion Advanced Streaming Server Commercial License Agreement. 
18  # See "LICENSE.Flumotion" in the source distribution for more information. 
19   
20  # Headers in this file shall remain intact. 
21   
22  """ 
23  A bouncer that authenticates based on the IP address of the remote side, 
24  as seen by the bouncer. 
25  """ 
26   
27  from flumotion.common import keycards, messages, errors, log, netutils 
28  from flumotion.common.i18n import N_, gettexter 
29  from flumotion.component.bouncers.algorithms import base 
30   
31  __all__ = ['IPBouncerAlgorithm'] 
32  __version__ = "$Rev$" 
33  T_ = gettexter() 
34   
35   
36 -class IPBouncerAlgorithm(base.BouncerAlgorithm):
37 38 logCategory = 'ip-bouncer' 39 volatile = False 40
41 - def get_namespace(self):
42 return 'ipbouncer'
43
44 - def start(self, component):
45 self.props = self.args['properties'] 46 self.deny_default = self.props.get('deny-default', True) 47 48 self.allows = netutils.RoutingTable() 49 self.denies = netutils.RoutingTable() 50 for p, t in (('allow', self.allows), ('deny', self.denies)): 51 for s in self.props.get(p, []): 52 try: 53 ip, mask = s.split('/') 54 t.addSubnet(True, ip, int(mask)) 55 except Exception, e: 56 m = messages.Error( 57 T_(N_("Invalid value for property %r: %s"), p, s), 58 log.getExceptionMessage(e), 59 mid='match-type') 60 component.addMessage(m) 61 raise errors.ComponentSetupHandledError()
62
63 - def authenticate(self, keycard):
64 ip = keycard.getData()['address'] 65 self.debug('authenticating keycard from requester %s', ip) 66 67 if ip is None: 68 self.warning('could not get address of remote') 69 allowed = False 70 elif self.deny_default: 71 allowed = (self.allows.route(ip) 72 and not self.denies.route(ip)) 73 else: 74 allowed = (self.allows.route(ip) 75 or not self.denies.route(ip)) 76 77 if not allowed: 78 self.info('denied login from ip address %s', 79 keycard.address) 80 return None 81 else: 82 keycard.state = keycards.AUTHENTICATED 83 self.debug('allowed login from ip address %s', 84 keycard.address) 85 return keycard
86