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source: protocols/skype/skyped.py @ e4f5ca8

Last change on this file since e4f5ca8 was 9ec6b36, checked in by Miklos Vajna <vmiklos@…>, at 2013-01-13T11:41:21Z
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[47c590c]	1	#!/usr/bin/env python2.7
[cd3022c]	2	#
	3	# skyped.py
	4	#
[9ec6b36]	5	# Copyright (c) 2007-2013 by Miklos Vajna <vmiklos@vmiklos.hu>
[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
[9ce44dd]	34	from fcntl import fcntl, F_SETFD, FD_CLOEXEC
[c7000bb]	35	import ssl
[4ddda13]	36
[8237df5]	37	__version__ = "0.1.1"
[4ddda13]	38
[d5a66f8]	39	try:
	40	import gobject
	41	hasgobject = True
	42	except ImportError:
	43	import select
	44	import threading
	45	hasgobject = False
	46
[eeeb30e]	47	def eh(type, value, tb):
[a618ea6]	48	global options
	49
[3a2a0b2]	50	if type != KeyboardInterrupt:
	51	print_exception(type, value, tb)
[d5a66f8]	52	if hasgobject:
	53	gobject.MainLoop().quit()
[53eb75c]	54	if options.conn:
	55	options.conn.close()
[7415989]	56	# shut down client if it's running
	57	try:
	58	skype.skype.Client.Shutdown()
	59	except NameError:
	60	pass
[3a2a0b2]	61	sys.exit("Exiting.")
[eeeb30e]	62
	63	sys.excepthook = eh
	64
[d45adcf]	65	def wait_for_lock(lock, timeout_to_print, timeout, msg):
	66	start = time.time()
	67	locked = lock.acquire(0)
	68	while not(locked):
	69	time.sleep(0.5)
	70	if timeout_to_print and (time.time() - timeout_to_print > start):
	71	dprint("%s: Waited %f seconds" % \
	72	(msg, time.time() - start))
	73	timeout_to_print = False
	74	if timeout and (time.time() - timeout > start):
	75	dprint("%s: Waited %f seconds, giving up" % \
	76	(msg, time.time() - start))
	77	return False
	78	locked = lock.acquire(0)
	79	return True
	80
[d5a66f8]	81	def input_handler(fd, io_condition = None):
[5245e9d]	82	global options
[e530abd]	83	global skype
[5245e9d]	84	if options.buf:
	85	for i in options.buf:
	86	skype.send(i.strip())
	87	options.buf = None
[d5a66f8]	88	if not hasgobject:
	89	return True
[5245e9d]	90	else:
[d5a66f8]	91	if not hasgobject:
	92	close_socket = False
	93	if wait_for_lock(options.lock, 3, 10, "input_handler"):
	94	try:
	95	input = fd.recv(1024)
	96	options.lock.release()
	97	except Exception, s:
	98	dprint("Warning, receiving 1024 bytes failed (%s)." % s)
	99	fd.close()
	100	options.conn = False
[d45adcf]	101	options.lock.release()
[d5a66f8]	102	return False
	103	for i in input.split("\n"):
	104	if i.strip() == "SET USERSTATUS OFFLINE":
	105	close_socket = True
	106	skype.send(i.strip())
	107	return not(close_socket)
	108	try:
	109	input = fd.recv(1024)
	110	except Exception, s:
	111	dprint("Warning, receiving 1024 bytes failed (%s)." % s)
	112	fd.close()
	113	return False
	114	for i in input.split("\n"):
	115	skype.send(i.strip())
	116	return True
[c15f71a]	117
[4b0092e]	118	def skype_idle_handler(skype):
[3922d44]	119	try:
[6af541d]	120	c = skype.skype.Command("PING", Block=True)
	121	skype.skype.SendCommand(c)
[1a0b734]	122	except (Skype4Py.SkypeAPIError, AttributeError), s:
[3922d44]	123	dprint("Warning, pinging Skype failed (%s)." % (s))
[1a0b734]	124	time.sleep(1)
[94bd28f]	125	return True
[4ddda13]	126
[a618ea6]	127	def send(sock, txt):
[1130561]	128	global options
[d5a66f8]	129	from time import sleep
[a618ea6]	130	count = 1
	131	done = False
[d5a66f8]	132	if hasgobject:
	133	while (not done) and (count < 10):
[d45adcf]	134	try:
[d5a66f8]	135	sock.send(txt)
[d45adcf]	136	done = True
	137	except Exception, s:
	138	count += 1
	139	dprint("Warning, sending '%s' failed (%s). count=%d" % (txt, s, count))
[d5a66f8]	140	sleep(1)
	141	if not done:
[53eb75c]	142	options.conn.close()
[d5a66f8]	143	else:
	144	while (not done) and (count < 10) and options.conn:
	145	if wait_for_lock(options.lock, 3, 10, "socket send"):
	146	try:
	147	if options.conn: sock.send(txt)
	148	options.lock.release()
	149	done = True
	150	except Exception, s:
	151	options.lock.release()
	152	count += 1
	153	dprint("Warning, sending '%s' failed (%s). count=%d" % (txt, s, count))
	154	sleep(1)
	155	if not done:
	156	if options.conn:
	157	options.conn.close()
	158	options.conn = False
	159	return done
[a618ea6]	160
[4b0092e]	161	def bitlbee_idle_handler(skype):
[eeab8bc]	162	global options
[e530abd]	163	done = False
[4b0092e]	164	if options.conn:
	165	try:
	166	e = "PING"
[e530abd]	167	done = send(options.conn, "%s\n" % e)
[4b0092e]	168	except Exception, s:
	169	dprint("Warning, sending '%s' failed (%s)." % (e, s))
[d5a66f8]	170	if hasgobject:
	171	options.conn.close()
	172	else:
	173	if options.conn: options.conn.close()
	174	options.conn = False
	175	done = False
	176	if hasgobject:
	177	return True
	178	else:
	179	return done
	180	return True
[4b0092e]	181
[d5a66f8]	182	def server(host, port, skype = None):
[c7304b2]	183	global options
[05d964c]	184	if ":" in host:
	185	sock = socket.socket(socket.AF_INET6)
	186	else:
	187	sock = socket.socket()
[a316c4e]	188	sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
[9ce44dd]	189	fcntl(sock, F_SETFD, FD_CLOEXEC);
[a316c4e]	190	sock.bind((host, port))
	191	sock.listen(1)
[9ce44dd]	192
[d5a66f8]	193	if hasgobject:
	194	gobject.io_add_watch(sock, gobject.IO_IN, listener)
	195	else:
	196	dprint("Waiting for connection...")
	197	listener(sock, skype)
[a316c4e]	198
[eeab8bc]	199	def listener(sock, skype):
[5245e9d]	200	global options
[d5a66f8]	201	if not hasgobject:
	202	if not(wait_for_lock(options.lock, 3, 10, "listener")): return False
[c7000bb]	203	rawsock, addr = sock.accept()
[6ba00ac]	204	try:
	205	options.conn = ssl.wrap_socket(rawsock,
	206	server_side=True,
	207	certfile=options.config.sslcert,
	208	keyfile=options.config.sslkey,
	209	ssl_version=ssl.PROTOCOL_TLSv1)
	210	except ssl.SSLError:
	211	dprint("Warning, SSL init failed, did you create your certificate?")
	212	return False
[b0d40f5]	213	if hasattr(options.conn, 'handshake'):
[5588f7c4]	214	try:
	215	options.conn.handshake()
	216	except Exception:
[d5a66f8]	217	if not hasgobject:
	218	options.lock.release()
[5588f7c4]	219	dprint("Warning, handshake failed, closing connection.")
	220	return False
[5245e9d]	221	ret = 0
[6b9cab1]	222	try:
	223	line = options.conn.recv(1024)
	224	if line.startswith("USERNAME") and line.split(' ')[1].strip() == options.config.username:
	225	ret += 1
	226	line = options.conn.recv(1024)
[8edfc90]	227	if line.startswith("PASSWORD") and hashlib.sha1(line.split(' ')[1].strip()).hexdigest() == options.config.password:
[6b9cab1]	228	ret += 1
	229	except Exception, s:
	230	dprint("Warning, receiving 1024 bytes failed (%s)." % s)
	231	options.conn.close()
[d5a66f8]	232	if not hasgobject:
	233	options.conn = False
	234	options.lock.release()
[6b9cab1]	235	return False
[5245e9d]	236	if ret == 2:
	237	dprint("Username and password OK.")
[c7304b2]	238	options.conn.send("PASSWORD OK\n")
[d5a66f8]	239	if hasgobject:
	240	gobject.io_add_watch(options.conn, gobject.IO_IN, input_handler)
	241	else:
	242	options.lock.release()
	243	serverloop(options, skype)
[5245e9d]	244	return True
	245	else:
	246	dprint("Username and/or password WRONG.")
[c7304b2]	247	options.conn.send("PASSWORD KO\n")
[d5a66f8]	248	if not hasgobject:
	249	options.conn.close()
	250	options.conn = False
	251	options.lock.release()
[5245e9d]	252	return False
[a316c4e]	253
	254	def dprint(msg):
[ffd078a]	255	from time import strftime
[8237df5]	256	global options
	257
[ffd078a]	258	now = strftime("%Y-%m-%d %H:%M:%S")
	259
[8237df5]	260	if options.debug:
[f503585]	261	try:
	262	print now + ": " + msg
	263	except Exception, s:
	264	try:
	265	sanitized = msg.encode("ascii", "backslashreplace")
	266	except Error, s:
	267	try:
	268	sanitized = "hex [" + msg.encode("hex") + "]"
	269	except Error, s:
	270	sanitized = "[unable to print debug message]"
	271	print now + "~=" + sanitized
[a618ea6]	272	sys.stdout.flush()
[bcdc24b]	273	if options.log:
	274	sock = open(options.log, "a")
[ea1d796]	275	sock.write("%s: %s\n" % (now, msg))
[bcdc24b]	276	sock.close()
[a316c4e]	277
[fffabad]	278	class MockedSkype:
	279	"""Mock class for Skype4Py.Skype(), in case the -m option is used."""
	280	def __init__(self, mock):
	281	sock = open(mock)
	282	self.lines = sock.readlines()
	283
	284	def SendCommand(self, c):
	285	pass
	286
	287	def Command(self, msg, Block):
	288	if msg == "PING":
	289	return ["PONG"]
	290	line = self.lines[0].strip()
	291	if not line.startswith(">> "):
	292	raise Exception("Corrupted mock input")
	293	line = line[3:]
	294	if line != msg:
	295	raise Exception("'%s' != '%s'" % (line, msg))
	296	self.lines = self.lines[1:] # drop the expected incoming line
	297	ret = []
	298	while True:
	299	# and now send back all the following lines, up to the next expected incoming line
	300	if len(self.lines) == 0:
	301	break
	302	if self.lines[0].startswith(">> "):
	303	break
	304	if not self.lines[0].startswith("<< "):
	305	raise Exception("Corrupted mock input")
	306	ret.append(self.lines[0][3:].strip())
	307	self.lines = self.lines[1:]
	308	return ret
	309
[944a941]	310	class SkypeApi:
[fffabad]	311	def __init__(self, mock):
	312	if not mock:
	313	self.skype = Skype4Py.Skype()
	314	self.skype.OnNotify = self.recv
	315	self.skype.Client.Start()
	316	else:
	317	self.skype = MockedSkype(mock)
[94bd28f]	318
[5268bd7]	319	def recv(self, msg_text):
[5245e9d]	320	global options
[d86dfb1]	321	if msg_text == "PONG":
	322	return
[c15f71a]	323	if "\n" in msg_text:
[7613670]	324	# crappy skype prefixes only the first line for
	325	# multiline messages so we need to do so for the other
	326	# lines, too. this is something like:
	327	# 'CHATMESSAGE id BODY first line\nsecond line' ->
	328	# 'CHATMESSAGE id BODY first line\nCHATMESSAGE id BODY second line'
[c15f71a]	329	prefix = " ".join(msg_text.split(" ")[:3])
	330	msg_text = ["%s %s" % (prefix, i) for i in " ".join(msg_text.split(" ")[3:]).split("\n")]
[7613670]	331	else:
[c15f71a]	332	msg_text = [msg_text]
	333	for i in msg_text:
[3423be0]	334	try:
	335	# Internally, BitlBee always uses UTF-8 and encodes/decodes as
	336	# necessary to communicate with the IRC client; thus send the
	337	# UTF-8 it expects
	338	e = i.encode('UTF-8')
	339	except:
	340	# Should never happen, but it's better to send difficult to
	341	# read data than crash because some message couldn't be encoded
	342	e = i.encode('ascii', 'backslashreplace')
[5245e9d]	343	if options.conn:
[e530abd]	344	dprint('<< ' + e)
[af8675f]	345	try:
[a618ea6]	346	send(options.conn, e + "\n")
[80dfdce]	347	except Exception, s:
[a75f2a7]	348	dprint("Warning, sending '%s' failed (%s)." % (e, s))
[e530abd]	349	if options.conn: options.conn.close()
	350	options.conn = False
	351	else:
[53eb75c]	352	dprint('-- ' + e)
[c15f71a]	353
	354	def send(self, msg_text):
[4b0092e]	355	if not len(msg_text) or msg_text == "PONG":
[53eb75c]	356	if msg_text == "PONG":
	357	options.last_bitlbee_pong = time.time()
[c15f71a]	358	return
[885e563e]	359	try:
[3423be0]	360	# Internally, BitlBee always uses UTF-8 and encodes/decodes as
	361	# necessary to communicate with the IRC client; thus decode the
	362	# UTF-8 it sent us
[885e563e]	363	e = msg_text.decode('UTF-8')
[3423be0]	364	except:
	365	# Should never happen, but it's better to send difficult to read
	366	# data to Skype than to crash
	367	e = msg_text.decode('ascii', 'backslashreplace')
[52d779e]	368	dprint('>> ' + e)
[c15f71a]	369	try:
[05cf927]	370	c = self.skype.Command(e, Block=True)
	371	self.skype.SendCommand(c)
[fffabad]	372	if hasattr(c, "Reply"):
	373	self.recv(c.Reply) # Skype4Py answer
	374	else:
	375	for i in c: # mock may return multiple iterable answers
	376	self.recv(i)
[05cf927]	377	except Skype4Py.SkypeError:
[c15f71a]	378	pass
[8b3beef]	379	except Skype4Py.SkypeAPIError, s:
[a75f2a7]	380	dprint("Warning, sending '%s' failed (%s)." % (e, s))
[4ddda13]	381
[8237df5]	382	class Options:
	383	def __init__(self):
[1b48afb]	384	self.cfgpath = os.path.join(os.environ['HOME'], ".skyped", "skyped.conf")
[2ff0f37]	385	# fall back to system-wide settings
[1a575f69]	386	self.syscfgpath = "/usr/local/etc/skyped/skyped.conf"
[2ff0f37]	387	if os.path.exists(self.syscfgpath) and not os.path.exists(self.cfgpath):
[1a575f69]	388	self.cfgpath = self.syscfgpath
[8237df5]	389	self.daemon = True
	390	self.debug = False
	391	self.help = False
[7e450c3]	392	self.host = "0.0.0.0"
[bcdc24b]	393	self.log = None
[d891915]	394	self.port = None
[8237df5]	395	self.version = False
[5245e9d]	396	# well, this is a bit hackish. we store the socket of the last connected client
	397	# here and notify it. maybe later notify all connected clients?
	398	self.conn = None
	399	# this will be read first by the input handler
	400	self.buf = None
[fffabad]	401	self.mock = None
[5245e9d]	402
[8237df5]	403
	404	def usage(self, ret):
	405	print """Usage: skyped [OPTION]...
	406
	407	skyped is a daemon that acts as a tcp server on top of a Skype instance.
	408
	409	Options:
[5245e9d]	410	-c --config path to configuration file (default: %s)
[8237df5]	411	-d --debug enable debug messages
	412	-h --help this help
[05d964c]	413	-H --host set the tcp host, supports IPv4 and IPv6 (default: %s)
[bcdc24b]	414	-l --log set the log file in background mode (default: none)
[8237df5]	415	-n --nofork don't run as daemon in the background
[a349932]	416	-p --port set the tcp port (default: %s)
[5245e9d]	417	-v --version display version information""" % (self.cfgpath, self.host, self.port)
[8237df5]	418	sys.exit(ret)
	419
[eeab8bc]	420	def serverloop(options, skype):
	421	timeout = 1; # in seconds
	422	skype_ping_period = 5
[e530abd]	423	bitlbee_ping_period = 10
	424	bitlbee_pong_timeout = 30
	425	now = time.time()
	426	skype_ping_start_time = now
	427	bitlbee_ping_start_time = now
	428	options.last_bitlbee_pong = now
	429	in_error = []
	430	handler_ok = True
	431	while (len(in_error) == 0) and handler_ok and options.conn:
[eeab8bc]	432	ready_to_read, ready_to_write, in_error = \
[9c51166]	433	select.select([options.conn], [], [options.conn], \
	434	timeout)
[eeab8bc]	435	now = time.time()
[9c51166]	436	handler_ok = len(in_error) == 0
	437	if (len(ready_to_read) == 1) and handler_ok:
[e530abd]	438	handler_ok = input_handler(ready_to_read.pop())
[eeab8bc]	439	# don't ping bitlbee/skype if they already received data
[9c51166]	440	now = time.time() # allow for the input_handler to take some time
[eeab8bc]	441	bitlbee_ping_start_time = now
	442	skype_ping_start_time = now
[9c51166]	443	options.last_bitlbee_pong = now
[e530abd]	444	if (now - skype_ping_period > skype_ping_start_time) and handler_ok:
	445	handler_ok = skype_idle_handler(skype)
[eeab8bc]	446	skype_ping_start_time = now
	447	if now - bitlbee_ping_period > bitlbee_ping_start_time:
[e530abd]	448	handler_ok = bitlbee_idle_handler(skype)
[eeab8bc]	449	bitlbee_ping_start_time = now
[e530abd]	450	if options.last_bitlbee_pong:
	451	if (now - options.last_bitlbee_pong) > bitlbee_pong_timeout:
	452	dprint("Bitlbee pong timeout")
	453	# TODO is following line necessary? Should there be a options.conn.unwrap() somewhere?
	454	# options.conn.shutdown()
[53eb75c]	455	if options.conn:
	456	options.conn.close()
[e530abd]	457	options.conn = False
	458	else:
	459	options.last_bitlbee_pong = now
[eeab8bc]	460
[4ddda13]	461	if __name__=='__main__':
[8237df5]	462	options = Options()
	463	try:
[fffabad]	464	opts, args = getopt.getopt(sys.argv[1:], "c:dhH:l:m:np:v", ["config=", "debug", "help", "host=", "log=", "mock=", "nofork", "port=", "version"])
[8237df5]	465	except getopt.GetoptError:
	466	options.usage(1)
	467	for opt, arg in opts:
[5245e9d]	468	if opt in ("-c", "--config"):
	469	options.cfgpath = arg
	470	elif opt in ("-d", "--debug"):
[8237df5]	471	options.debug = True
	472	elif opt in ("-h", "--help"):
	473	options.help = True
[7e450c3]	474	elif opt in ("-H", "--host"):
	475	options.host = arg
[bcdc24b]	476	elif opt in ("-l", "--log"):
	477	options.log = arg
[fffabad]	478	elif opt in ("-m", "--mock"):
	479	options.mock = arg
[8237df5]	480	elif opt in ("-n", "--nofork"):
	481	options.daemon = False
	482	elif opt in ("-p", "--port"):
[d891915]	483	options.port = int(arg)
[8237df5]	484	elif opt in ("-v", "--version"):
	485	options.version = True
	486	if options.help:
	487	options.usage(0)
	488	elif options.version:
	489	print "skyped %s" % __version__
	490	sys.exit(0)
[5245e9d]	491	# parse our config
	492	if not os.path.exists(options.cfgpath):
	493	print "Can't find configuration file at '%s'." % options.cfgpath
	494	print "Use the -c option to specify an alternate one."
	495	sys.exit(1)
	496	options.config = ConfigParser()
	497	options.config.read(options.cfgpath)
	498	options.config.username = options.config.get('skyped', 'username').split('#')[0]
	499	options.config.password = options.config.get('skyped', 'password').split('#')[0]
[7cc2c1e]	500	options.config.sslkey = os.path.expanduser(options.config.get('skyped', 'key').split('#')[0])
	501	options.config.sslcert = os.path.expanduser(options.config.get('skyped', 'cert').split('#')[0])
[d891915]	502	# hack: we have to parse the parameters first to locate the
	503	# config file but the -p option should overwrite the value from
	504	# the config file
	505	try:
	506	options.config.port = int(options.config.get('skyped', 'port').split('#')[0])
	507	if not options.port:
	508	options.port = options.config.port
	509	except NoOptionError:
	510	pass
	511	if not options.port:
	512	options.port = 2727
[5245e9d]	513	dprint("Parsing config file '%s' done, username is '%s'." % (options.cfgpath, options.config.username))
	514	if options.daemon:
[8237df5]	515	pid = os.fork()
	516	if pid == 0:
[56ae398]	517	nullin = file(os.devnull, 'r')
	518	nullout = file(os.devnull, 'w')
[8237df5]	519	os.dup2(nullin.fileno(), sys.stdin.fileno())
	520	os.dup2(nullout.fileno(), sys.stdout.fileno())
	521	os.dup2(nullout.fileno(), sys.stderr.fileno())
	522	else:
	523	print 'skyped is started on port %s, pid: %d' % (options.port, pid)
	524	sys.exit(0)
[d891915]	525	else:
	526	dprint('skyped is started on port %s' % options.port)
[d5a66f8]	527	if hasgobject:
	528	server(options.host, options.port)
[c15f71a]	529	try:
[fffabad]	530	skype = SkypeApi(options.mock)
[8b3beef]	531	except Skype4Py.SkypeAPIError, s:
[c15f71a]	532	sys.exit("%s. Are you sure you have started Skype?" % s)
[d5a66f8]	533	if hasgobject:
	534	gobject.timeout_add(2000, skype_idle_handler, skype)
	535	gobject.timeout_add(60000, bitlbee_idle_handler, skype)
	536	gobject.MainLoop().run()
	537	else:
	538	while 1:
	539	options.conn = False
	540	options.lock = threading.Lock()
	541	server(options.host, options.port, skype)

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