4 ### Service for establishing dynamic connections
6 ### (c) 2006 Straylight/Edgeware
9 ###----- Licensing notice ---------------------------------------------------
11 ### This file is part of Trivial IP Encryption (TrIPE).
13 ### TrIPE is free software; you can redistribute it and/or modify
14 ### it under the terms of the GNU General Public License as published by
15 ### the Free Software Foundation; either version 2 of the License, or
16 ### (at your option) any later version.
18 ### TrIPE is distributed in the hope that it will be useful,
19 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ### GNU General Public License for more details.
23 ### You should have received a copy of the GNU General Public License
24 ### along with TrIPE; if not, write to the Free Software Foundation,
25 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 ###--------------------------------------------------------------------------
30 ### External dependencies.
32 from optparse import OptionParser
41 ###--------------------------------------------------------------------------
42 ### Main service machinery.
44 _magic = ['_magic'] # An object distinct from all others
47 """Representation of a peer in the database."""
49 def __init__(me, peer, cdb = None):
51 Create a new peer, named PEER.
53 Information about the peer is read from the database CDB, or the default
54 one given on the command-line.
58 record = (cdb or CDB.init(opts.cdb))['P' + peer]
60 raise T.TripeJobError('unknown-peer', peer)
61 me.__dict__.update(M.URLDecode(record, semip = True))
63 def get(me, key, default = _magic):
65 Get the information stashed under KEY from the peer's database record.
67 If DEFAULT is given, then use it if the database doesn't contain the
68 necessary information. If no DEFAULT is given, then report an error.
70 attr = me.__dict__.get(key, default)
72 raise T.TripeJobError('malformed-peer', me.name, 'missing-key', key)
77 Iterate over the available keys in the peer's database record.
79 return me.__dict__.iterkeys()
81 def addpeer(peer, addr):
83 Process a connect request from a new peer PEER on address ADDR.
85 Any existing peer with this name is disconnected from the server.
87 if peer.name in S.list():
90 booltrue = ['t', 'true', 'y', 'yes', 'on']
92 tunnel = peer.get('tunnel', None),
93 keepalive = peer.get('keepalive', None),
94 key = peer.get('key', None),
95 mobile = peer.get('mobile', 'nil') in booltrue,
96 cork = peer.get('cork', 'nil') in booltrue,
98 except T.TripeError, exc:
99 raise T.TripeJobError(*exc.args)
101 def cmd_active(name):
103 active NAME: Handle an active connection request for the peer called NAME.
105 The appropriate address is read from the database automatically.
108 addr = peer.get('peer')
109 if addr == 'PASSIVE':
110 raise T.TripeJobError('passive-peer', name)
111 addpeer(peer, M.split(addr, quotep = True)[0])
115 list: Report a list of the available active peers.
117 cdb = CDB.init(opts.cdb)
118 for key in cdb.keys():
119 if key.startswith('P') and Peer(key[1:]).get('peer', '') != 'PASSIVE':
124 info NAME: Report the database entries for the named peer.
127 items = list(peer.list())
130 T.svcinfo('%s=%s' % (i, peer.get(i)))
132 ## Dictionary mapping challenges to waiting passive-connection coroutines.
135 def cmd_passive(*args):
137 passive [OPTIONS] USER: Await the arrival of the named USER.
139 Report a challenge; when (and if!) the server receives a greeting quoting
140 this challenge, add the corresponding peer to the server.
143 op = T.OptParse(args, ['-timeout'])
145 if opt == '-timeout':
146 timeout = T.timespec(op.arg())
147 user, = op.rest(1, 1)
149 peer = CDB.init(opts.cdb)['U' + user]
151 raise T.TripeJobError('unknown-user', user)
153 cr = T.Coroutine.getcurrent()
154 timer = M.SelTimer(time() + timeout, lambda: cr.switch(None))
158 addr = cr.parent.switch()
160 raise T.TripeJobError('connect-timeout')
161 addpeer(Peer(peer), addr)
165 def notify(_, code, *rest):
167 Watch for notifications.
169 In particular, if a GREETing appears quoting a challenge in the chalmap
170 then wake up the corresponding coroutine.
177 chalmap[chal].switch(addr)
179 ###--------------------------------------------------------------------------
186 Register the notification-watcher, and add the automatic active peers.
188 S.handler['NOTE'] = notify
191 cdb = CDB.init(opts.cdb)
196 for name in M.split(autos)[0]:
198 peer = Peer(name, cdb)
199 addpeer(peer, M.split(peer.get('peer'), quotep = True)[0])
200 except T.TripeJobError, err:
201 S.warn('connect', 'auto-add-failed', name, *err.args)
205 Parse the command-line options.
207 Automatically changes directory to the requested configdir, and turns on
208 debugging. Returns the options object.
210 op = OptionParser(usage = '%prog [-a FILE] [-d DIR]',
211 version = '%%prog %s' % VERSION)
213 op.add_option('-a', '--admin-socket',
214 metavar = 'FILE', dest = 'tripesock', default = T.tripesock,
215 help = 'Select socket to connect to [default %default]')
216 op.add_option('-d', '--directory',
217 metavar = 'DIR', dest = 'dir', default = T.configdir,
218 help = 'Select current diretory [default %default]')
219 op.add_option('-p', '--peerdb',
220 metavar = 'FILE', dest = 'cdb', default = T.peerdb,
221 help = 'Select peers database [default %default]')
222 op.add_option('--daemon', dest = 'daemon',
223 default = False, action = 'store_true',
224 help = 'Become a daemon after successful initialization')
225 op.add_option('--debug', dest = 'debug',
226 default = False, action = 'store_true',
227 help = 'Emit debugging trace information')
228 op.add_option('--startup', dest = 'startup',
229 default = False, action = 'store_true',
230 help = 'Being called as part of the server startup')
232 opts, args = op.parse_args()
233 if args: op.error('no arguments permitted')
235 T._debug = opts.debug
238 ## Service table, for running manually.
239 service_info = [('connect', VERSION, {
240 'passive': (1, None, '[OPTIONS] USER', cmd_passive),
241 'active': (1, 1, 'PEER', cmd_active),
242 'info': (1, 1, 'PEER', cmd_info),
243 'list': (0, 0, '', cmd_list)
246 if __name__ == '__main__':
247 opts = parse_options()
248 T.runservices(opts.tripesock, service_info,
250 daemon = opts.daemon)
252 ###----- That's all, folks --------------------------------------------------