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source: protocols/skype/skyped.py @ 486ddb5

Last change on this file since 486ddb5 was 6ba00ac, checked in by Miklos Vajna <vmiklos@…>, at 2011-12-11T23:25:40Z
skyped: give reasonable error message when cert is missing
Property mode set to `100644`
File size: 14.4 KB

Rev	Line
[47c590c]	1	#!/usr/bin/env python2.7
[cd3022c]	2	#
	3	# skyped.py
	4	#
[d5a66f8]	5	# Copyright (c) 2007, 2008, 2009, 2010, 2011 by Miklos Vajna <vmiklos@frugalware.org>
[cd3022c]	6	#
	7	# This program is free software; you can redistribute it and/or modify
	8	# it under the terms of the GNU General Public License as published by
	9	# the Free Software Foundation; either version 2 of the License, or
	10	# (at your option) any later version.
	11	#
	12	# This program is distributed in the hope that it will be useful,
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	# GNU General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with this program; if not, write to the Free Software
	19	# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
	20	# USA.
	21	#
	22
[4ddda13]	23	import sys
[8237df5]	24	import os
[4ddda13]	25	import signal
	26	import locale
	27	import time
	28	import socket
[8237df5]	29	import getopt
[c15f71a]	30	import Skype4Py
[8edfc90]	31	import hashlib
[d891915]	32	from ConfigParser import ConfigParser, NoOptionError
[eeeb30e]	33	from traceback import print_exception
[c7000bb]	34	import ssl
[4ddda13]	35
[8237df5]	36	__version__ = "0.1.1"
[4ddda13]	37
[d5a66f8]	38	try:
	39	import gobject
	40	hasgobject = True
	41	except ImportError:
	42	import select
	43	import threading
	44	hasgobject = False
	45
[eeeb30e]	46	def eh(type, value, tb):
[a618ea6]	47	global options
	48
[3a2a0b2]	49	if type != KeyboardInterrupt:
	50	print_exception(type, value, tb)
[d5a66f8]	51	if hasgobject:
	52	gobject.MainLoop().quit()
[53eb75c]	53	if options.conn:
	54	options.conn.close()
[7415989]	55	# shut down client if it's running
	56	try:
	57	skype.skype.Client.Shutdown()
	58	except NameError:
	59	pass
[3a2a0b2]	60	sys.exit("Exiting.")
[eeeb30e]	61
	62	sys.excepthook = eh
	63
[d45adcf]	64	def wait_for_lock(lock, timeout_to_print, timeout, msg):
	65	start = time.time()
	66	locked = lock.acquire(0)
	67	while not(locked):
	68	time.sleep(0.5)
	69	if timeout_to_print and (time.time() - timeout_to_print > start):
	70	dprint("%s: Waited %f seconds" % \
	71	(msg, time.time() - start))
	72	timeout_to_print = False
	73	if timeout and (time.time() - timeout > start):
	74	dprint("%s: Waited %f seconds, giving up" % \
	75	(msg, time.time() - start))
	76	return False
	77	locked = lock.acquire(0)
	78	return True
	79
[d5a66f8]	80	def input_handler(fd, io_condition = None):
[5245e9d]	81	global options
[e530abd]	82	global skype
[5245e9d]	83	if options.buf:
	84	for i in options.buf:
	85	skype.send(i.strip())
	86	options.buf = None
[d5a66f8]	87	if not hasgobject:
	88	return True
[5245e9d]	89	else:
[d5a66f8]	90	if not hasgobject:
	91	close_socket = False
	92	if wait_for_lock(options.lock, 3, 10, "input_handler"):
	93	try:
	94	input = fd.recv(1024)
	95	options.lock.release()
	96	except Exception, s:
	97	dprint("Warning, receiving 1024 bytes failed (%s)." % s)
	98	fd.close()
	99	options.conn = False
[d45adcf]	100	options.lock.release()
[d5a66f8]	101	return False
	102	for i in input.split("\n"):
	103	if i.strip() == "SET USERSTATUS OFFLINE":
	104	close_socket = True
	105	skype.send(i.strip())
	106	return not(close_socket)
	107	try:
	108	input = fd.recv(1024)
	109	except Exception, s:
	110	dprint("Warning, receiving 1024 bytes failed (%s)." % s)
	111	fd.close()
	112	return False
	113	for i in input.split("\n"):
	114	skype.send(i.strip())
	115	return True
[c15f71a]	116
[4b0092e]	117	def skype_idle_handler(skype):
[3922d44]	118	try:
[6af541d]	119	c = skype.skype.Command("PING", Block=True)
	120	skype.skype.SendCommand(c)
[3922d44]	121	except Skype4Py.SkypeAPIError, s:
	122	dprint("Warning, pinging Skype failed (%s)." % (s))
[94bd28f]	123	return True
[4ddda13]	124
[a618ea6]	125	def send(sock, txt):
[1130561]	126	global options
[d5a66f8]	127	from time import sleep
[a618ea6]	128	count = 1
	129	done = False
[d5a66f8]	130	if hasgobject:
	131	while (not done) and (count < 10):
[d45adcf]	132	try:
[d5a66f8]	133	sock.send(txt)
[d45adcf]	134	done = True
	135	except Exception, s:
	136	count += 1
	137	dprint("Warning, sending '%s' failed (%s). count=%d" % (txt, s, count))
[d5a66f8]	138	sleep(1)
	139	if not done:
[53eb75c]	140	options.conn.close()
[d5a66f8]	141	else:
	142	while (not done) and (count < 10) and options.conn:
	143	if wait_for_lock(options.lock, 3, 10, "socket send"):
	144	try:
	145	if options.conn: sock.send(txt)
	146	options.lock.release()
	147	done = True
	148	except Exception, s:
	149	options.lock.release()
	150	count += 1
	151	dprint("Warning, sending '%s' failed (%s). count=%d" % (txt, s, count))
	152	sleep(1)
	153	if not done:
	154	if options.conn:
	155	options.conn.close()
	156	options.conn = False
	157	return done
[a618ea6]	158
[4b0092e]	159	def bitlbee_idle_handler(skype):
[eeab8bc]	160	global options
[e530abd]	161	done = False
[4b0092e]	162	if options.conn:
	163	try:
	164	e = "PING"
[e530abd]	165	done = send(options.conn, "%s\n" % e)
[4b0092e]	166	except Exception, s:
	167	dprint("Warning, sending '%s' failed (%s)." % (e, s))
[d5a66f8]	168	if hasgobject:
	169	options.conn.close()
	170	else:
	171	if options.conn: options.conn.close()
	172	options.conn = False
	173	done = False
	174	if hasgobject:
	175	return True
	176	else:
	177	return done
	178	return True
[4b0092e]	179
[d5a66f8]	180	def server(host, port, skype = None):
[c7304b2]	181	global options
[05d964c]	182	if ":" in host:
	183	sock = socket.socket(socket.AF_INET6)
	184	else:
	185	sock = socket.socket()
[a316c4e]	186	sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
	187	sock.bind((host, port))
	188	sock.listen(1)
[d5a66f8]	189	if hasgobject:
	190	gobject.io_add_watch(sock, gobject.IO_IN, listener)
	191	else:
	192	dprint("Waiting for connection...")
	193	listener(sock, skype)
[a316c4e]	194
[eeab8bc]	195	def listener(sock, skype):
[5245e9d]	196	global options
[d5a66f8]	197	if not hasgobject:
	198	if not(wait_for_lock(options.lock, 3, 10, "listener")): return False
[c7000bb]	199	rawsock, addr = sock.accept()
[6ba00ac]	200	try:
	201	options.conn = ssl.wrap_socket(rawsock,
	202	server_side=True,
	203	certfile=options.config.sslcert,
	204	keyfile=options.config.sslkey,
	205	ssl_version=ssl.PROTOCOL_TLSv1)
	206	except ssl.SSLError:
	207	dprint("Warning, SSL init failed, did you create your certificate?")
	208	return False
[b0d40f5]	209	if hasattr(options.conn, 'handshake'):
[5588f7c4]	210	try:
	211	options.conn.handshake()
	212	except Exception:
[d5a66f8]	213	if not hasgobject:
	214	options.lock.release()
[5588f7c4]	215	dprint("Warning, handshake failed, closing connection.")
	216	return False
[5245e9d]	217	ret = 0
[6b9cab1]	218	try:
	219	line = options.conn.recv(1024)
	220	if line.startswith("USERNAME") and line.split(' ')[1].strip() == options.config.username:
	221	ret += 1
	222	line = options.conn.recv(1024)
[8edfc90]	223	if line.startswith("PASSWORD") and hashlib.sha1(line.split(' ')[1].strip()).hexdigest() == options.config.password:
[6b9cab1]	224	ret += 1
	225	except Exception, s:
	226	dprint("Warning, receiving 1024 bytes failed (%s)." % s)
	227	options.conn.close()
[d5a66f8]	228	if not hasgobject:
	229	options.conn = False
	230	options.lock.release()
[6b9cab1]	231	return False
[5245e9d]	232	if ret == 2:
	233	dprint("Username and password OK.")
[c7304b2]	234	options.conn.send("PASSWORD OK\n")
[d5a66f8]	235	if hasgobject:
	236	gobject.io_add_watch(options.conn, gobject.IO_IN, input_handler)
	237	else:
	238	options.lock.release()
	239	serverloop(options, skype)
[5245e9d]	240	return True
	241	else:
	242	dprint("Username and/or password WRONG.")
[c7304b2]	243	options.conn.send("PASSWORD KO\n")
[d5a66f8]	244	if not hasgobject:
	245	options.conn.close()
	246	options.conn = False
	247	options.lock.release()
[5245e9d]	248	return False
[a316c4e]	249
	250	def dprint(msg):
[ffd078a]	251	from time import strftime
[8237df5]	252	global options
	253
[ffd078a]	254	now = strftime("%Y-%m-%d %H:%M:%S")
	255
[8237df5]	256	if options.debug:
[f503585]	257	try:
	258	print now + ": " + msg
	259	except Exception, s:
	260	try:
	261	sanitized = msg.encode("ascii", "backslashreplace")
	262	except Error, s:
	263	try:
	264	sanitized = "hex [" + msg.encode("hex") + "]"
	265	except Error, s:
	266	sanitized = "[unable to print debug message]"
	267	print now + "~=" + sanitized
[a618ea6]	268	sys.stdout.flush()
[bcdc24b]	269	if options.log:
	270	sock = open(options.log, "a")
[ea1d796]	271	sock.write("%s: %s\n" % (now, msg))
[bcdc24b]	272	sock.close()
[a316c4e]	273
[944a941]	274	class SkypeApi:
[94bd28f]	275	def __init__(self):
[c15f71a]	276	self.skype = Skype4Py.Skype()
[5268bd7]	277	self.skype.OnNotify = self.recv
[6af541d]	278	self.skype.Client.Start()
[94bd28f]	279
[5268bd7]	280	def recv(self, msg_text):
[5245e9d]	281	global options
[d86dfb1]	282	if msg_text == "PONG":
	283	return
[c15f71a]	284	if "\n" in msg_text:
[7613670]	285	# crappy skype prefixes only the first line for
	286	# multiline messages so we need to do so for the other
	287	# lines, too. this is something like:
	288	# 'CHATMESSAGE id BODY first line\nsecond line' ->
	289	# 'CHATMESSAGE id BODY first line\nCHATMESSAGE id BODY second line'
[c15f71a]	290	prefix = " ".join(msg_text.split(" ")[:3])
	291	msg_text = ["%s %s" % (prefix, i) for i in " ".join(msg_text.split(" ")[3:]).split("\n")]
[7613670]	292	else:
[c15f71a]	293	msg_text = [msg_text]
	294	for i in msg_text:
[3423be0]	295	try:
	296	# Internally, BitlBee always uses UTF-8 and encodes/decodes as
	297	# necessary to communicate with the IRC client; thus send the
	298	# UTF-8 it expects
	299	e = i.encode('UTF-8')
	300	except:
	301	# Should never happen, but it's better to send difficult to
	302	# read data than crash because some message couldn't be encoded
	303	e = i.encode('ascii', 'backslashreplace')
[5245e9d]	304	if options.conn:
[e530abd]	305	dprint('<< ' + e)
[af8675f]	306	try:
[a618ea6]	307	send(options.conn, e + "\n")
[80dfdce]	308	except Exception, s:
[a75f2a7]	309	dprint("Warning, sending '%s' failed (%s)." % (e, s))
[e530abd]	310	if options.conn: options.conn.close()
	311	options.conn = False
	312	else:
[53eb75c]	313	dprint('-- ' + e)
[c15f71a]	314
	315	def send(self, msg_text):
[4b0092e]	316	if not len(msg_text) or msg_text == "PONG":
[53eb75c]	317	if msg_text == "PONG":
	318	options.last_bitlbee_pong = time.time()
[c15f71a]	319	return
[885e563e]	320	try:
[3423be0]	321	# Internally, BitlBee always uses UTF-8 and encodes/decodes as
	322	# necessary to communicate with the IRC client; thus decode the
	323	# UTF-8 it sent us
[885e563e]	324	e = msg_text.decode('UTF-8')
[3423be0]	325	except:
	326	# Should never happen, but it's better to send difficult to read
	327	# data to Skype than to crash
	328	e = msg_text.decode('ascii', 'backslashreplace')
[52d779e]	329	dprint('>> ' + e)
[c15f71a]	330	try:
[05cf927]	331	c = self.skype.Command(e, Block=True)
	332	self.skype.SendCommand(c)
	333	self.recv(c.Reply)
	334	except Skype4Py.SkypeError:
[c15f71a]	335	pass
[8b3beef]	336	except Skype4Py.SkypeAPIError, s:
[a75f2a7]	337	dprint("Warning, sending '%s' failed (%s)." % (e, s))
[4ddda13]	338
[8237df5]	339	class Options:
	340	def __init__(self):
[1b48afb]	341	self.cfgpath = os.path.join(os.environ['HOME'], ".skyped", "skyped.conf")
[2ff0f37]	342	# fall back to system-wide settings
[1a575f69]	343	self.syscfgpath = "/usr/local/etc/skyped/skyped.conf"
[2ff0f37]	344	if os.path.exists(self.syscfgpath) and not os.path.exists(self.cfgpath):
[1a575f69]	345	self.cfgpath = self.syscfgpath
[8237df5]	346	self.daemon = True
	347	self.debug = False
	348	self.help = False
[7e450c3]	349	self.host = "0.0.0.0"
[bcdc24b]	350	self.log = None
[d891915]	351	self.port = None
[8237df5]	352	self.version = False
[5245e9d]	353	# well, this is a bit hackish. we store the socket of the last connected client
	354	# here and notify it. maybe later notify all connected clients?
	355	self.conn = None
	356	# this will be read first by the input handler
	357	self.buf = None
	358
[8237df5]	359
	360	def usage(self, ret):
	361	print """Usage: skyped [OPTION]...
	362
	363	skyped is a daemon that acts as a tcp server on top of a Skype instance.
	364
	365	Options:
[5245e9d]	366	-c --config path to configuration file (default: %s)
[8237df5]	367	-d --debug enable debug messages
	368	-h --help this help
[05d964c]	369	-H --host set the tcp host, supports IPv4 and IPv6 (default: %s)
[bcdc24b]	370	-l --log set the log file in background mode (default: none)
[8237df5]	371	-n --nofork don't run as daemon in the background
[a349932]	372	-p --port set the tcp port (default: %s)
[5245e9d]	373	-v --version display version information""" % (self.cfgpath, self.host, self.port)
[8237df5]	374	sys.exit(ret)
	375
[eeab8bc]	376	def serverloop(options, skype):
	377	timeout = 1; # in seconds
	378	skype_ping_period = 5
[e530abd]	379	bitlbee_ping_period = 10
	380	bitlbee_pong_timeout = 30
	381	now = time.time()
	382	skype_ping_start_time = now
	383	bitlbee_ping_start_time = now
	384	options.last_bitlbee_pong = now
	385	in_error = []
	386	handler_ok = True
	387	while (len(in_error) == 0) and handler_ok and options.conn:
[eeab8bc]	388	ready_to_read, ready_to_write, in_error = \
[9c51166]	389	select.select([options.conn], [], [options.conn], \
	390	timeout)
[eeab8bc]	391	now = time.time()
[9c51166]	392	handler_ok = len(in_error) == 0
	393	if (len(ready_to_read) == 1) and handler_ok:
[e530abd]	394	handler_ok = input_handler(ready_to_read.pop())
[eeab8bc]	395	# don't ping bitlbee/skype if they already received data
[9c51166]	396	now = time.time() # allow for the input_handler to take some time
[eeab8bc]	397	bitlbee_ping_start_time = now
	398	skype_ping_start_time = now
[9c51166]	399	options.last_bitlbee_pong = now
[e530abd]	400	if (now - skype_ping_period > skype_ping_start_time) and handler_ok:
	401	handler_ok = skype_idle_handler(skype)
[eeab8bc]	402	skype_ping_start_time = now
	403	if now - bitlbee_ping_period > bitlbee_ping_start_time:
[e530abd]	404	handler_ok = bitlbee_idle_handler(skype)
[eeab8bc]	405	bitlbee_ping_start_time = now
[e530abd]	406	if options.last_bitlbee_pong:
	407	if (now - options.last_bitlbee_pong) > bitlbee_pong_timeout:
	408	dprint("Bitlbee pong timeout")
	409	# TODO is following line necessary? Should there be a options.conn.unwrap() somewhere?
	410	# options.conn.shutdown()
[53eb75c]	411	if options.conn:
	412	options.conn.close()
[e530abd]	413	options.conn = False
	414	else:
	415	options.last_bitlbee_pong = now
[eeab8bc]	416
[4ddda13]	417	if __name__=='__main__':
[8237df5]	418	options = Options()
	419	try:
[a985369]	420	opts, args = getopt.getopt(sys.argv[1:], "c:dhH:l:np:v", ["config=", "debug", "help", "host=", "log=", "nofork", "port=", "version"])
[8237df5]	421	except getopt.GetoptError:
	422	options.usage(1)
	423	for opt, arg in opts:
[5245e9d]	424	if opt in ("-c", "--config"):
	425	options.cfgpath = arg
	426	elif opt in ("-d", "--debug"):
[8237df5]	427	options.debug = True
	428	elif opt in ("-h", "--help"):
	429	options.help = True
[7e450c3]	430	elif opt in ("-H", "--host"):
	431	options.host = arg
[bcdc24b]	432	elif opt in ("-l", "--log"):
	433	options.log = arg
[8237df5]	434	elif opt in ("-n", "--nofork"):
	435	options.daemon = False
	436	elif opt in ("-p", "--port"):
[d891915]	437	options.port = int(arg)
[8237df5]	438	elif opt in ("-v", "--version"):
	439	options.version = True
	440	if options.help:
	441	options.usage(0)
	442	elif options.version:
	443	print "skyped %s" % __version__
	444	sys.exit(0)
[5245e9d]	445	# parse our config
	446	if not os.path.exists(options.cfgpath):
	447	print "Can't find configuration file at '%s'." % options.cfgpath
	448	print "Use the -c option to specify an alternate one."
	449	sys.exit(1)
	450	options.config = ConfigParser()
	451	options.config.read(options.cfgpath)
	452	options.config.username = options.config.get('skyped', 'username').split('#')[0]
	453	options.config.password = options.config.get('skyped', 'password').split('#')[0]
[7cc2c1e]	454	options.config.sslkey = os.path.expanduser(options.config.get('skyped', 'key').split('#')[0])
	455	options.config.sslcert = os.path.expanduser(options.config.get('skyped', 'cert').split('#')[0])
[d891915]	456	# hack: we have to parse the parameters first to locate the
	457	# config file but the -p option should overwrite the value from
	458	# the config file
	459	try:
	460	options.config.port = int(options.config.get('skyped', 'port').split('#')[0])
	461	if not options.port:
	462	options.port = options.config.port
	463	except NoOptionError:
	464	pass
	465	if not options.port:
	466	options.port = 2727
[5245e9d]	467	dprint("Parsing config file '%s' done, username is '%s'." % (options.cfgpath, options.config.username))
	468	if options.daemon:
[8237df5]	469	pid = os.fork()
	470	if pid == 0:
[56ae398]	471	nullin = file(os.devnull, 'r')
	472	nullout = file(os.devnull, 'w')
[8237df5]	473	os.dup2(nullin.fileno(), sys.stdin.fileno())
	474	os.dup2(nullout.fileno(), sys.stdout.fileno())
	475	os.dup2(nullout.fileno(), sys.stderr.fileno())
	476	else:
	477	print 'skyped is started on port %s, pid: %d' % (options.port, pid)
	478	sys.exit(0)
[d891915]	479	else:
	480	dprint('skyped is started on port %s' % options.port)
[d5a66f8]	481	if hasgobject:
	482	server(options.host, options.port)
[c15f71a]	483	try:
[3953172]	484	skype = SkypeApi()
[8b3beef]	485	except Skype4Py.SkypeAPIError, s:
[c15f71a]	486	sys.exit("%s. Are you sure you have started Skype?" % s)
[d5a66f8]	487	if hasgobject:
	488	gobject.timeout_add(2000, skype_idle_handler, skype)
	489	gobject.timeout_add(60000, bitlbee_idle_handler, skype)
	490	gobject.MainLoop().run()
	491	else:
	492	while 1:
	493	options.conn = False
	494	options.lock = threading.Lock()
	495	server(options.host, options.port, skype)

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