1 | #!/usr/bin/env python2.7 |
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2 | # |
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3 | # skyped.py |
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4 | # |
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5 | # Copyright (c) 2007-2013 by Miklos Vajna <vmiklos@vmiklos.hu> |
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6 | # |
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7 | # This program is free software; you can redistribute it and/or modify |
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8 | # it under the terms of the GNU General Public License as published by |
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9 | # the Free Software Foundation; either version 2 of the License, or |
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10 | # (at your option) any later version. |
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11 | # |
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12 | # This program is distributed in the hope that it will be useful, |
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13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | # GNU General Public License for more details. |
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16 | # |
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17 | # You should have received a copy of the GNU General Public License |
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18 | # along with this program; if not, write to the Free Software |
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19 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
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20 | # USA. |
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21 | # |
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22 | |
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23 | import sys |
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24 | import os |
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25 | import signal |
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26 | import time |
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27 | import socket |
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28 | import Skype4Py |
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29 | import hashlib |
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30 | from ConfigParser import ConfigParser, NoOptionError |
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31 | from traceback import print_exception |
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32 | from fcntl import fcntl, F_SETFD, FD_CLOEXEC |
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33 | import ssl |
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34 | |
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35 | __version__ = "0.1.1" |
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36 | |
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37 | try: |
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38 | import gobject |
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39 | hasgobject = True |
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40 | except ImportError: |
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41 | import select |
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42 | import threading |
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43 | hasgobject = False |
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44 | |
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45 | def eh(type, value, tb): |
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46 | global options |
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47 | |
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48 | if type != KeyboardInterrupt: |
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49 | print_exception(type, value, tb) |
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50 | if hasgobject: |
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51 | gobject.MainLoop().quit() |
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52 | if options.conn: |
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53 | options.conn.close() |
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54 | if not options.dont_start_skype: |
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55 | # shut down client if it's running |
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56 | try: |
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57 | skype.skype.Client.Shutdown() |
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58 | except NameError: |
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59 | pass |
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60 | sys.exit("Exiting.") |
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61 | |
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62 | sys.excepthook = eh |
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63 | |
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64 | def wait_for_lock(lock, timeout_to_print, timeout, msg): |
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65 | start = time.time() |
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66 | locked = lock.acquire(0) |
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67 | while not(locked): |
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68 | time.sleep(0.5) |
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69 | if timeout_to_print and (time.time() - timeout_to_print > start): |
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70 | dprint("%s: Waited %f seconds" % \ |
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71 | (msg, time.time() - start)) |
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72 | timeout_to_print = False |
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73 | if timeout and (time.time() - timeout > start): |
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74 | dprint("%s: Waited %f seconds, giving up" % \ |
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75 | (msg, time.time() - start)) |
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76 | return False |
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77 | locked = lock.acquire(0) |
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78 | return True |
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79 | |
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80 | def input_handler(fd, io_condition = None): |
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81 | global options |
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82 | global skype |
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83 | if options.buf: |
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84 | for i in options.buf: |
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85 | skype.send(i.strip()) |
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86 | options.buf = None |
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87 | if not hasgobject: |
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88 | return True |
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89 | else: |
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90 | if not hasgobject: |
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91 | close_socket = False |
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92 | if wait_for_lock(options.lock, 3, 10, "input_handler"): |
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93 | try: |
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94 | input = fd.recv(1024) |
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95 | options.lock.release() |
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96 | except Exception, s: |
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97 | dprint("Warning, receiving 1024 bytes failed (%s)." % s) |
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98 | fd.close() |
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99 | options.conn = False |
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100 | options.lock.release() |
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101 | return False |
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102 | for i in input.split("\n"): |
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103 | if i.strip() == "SET USERSTATUS OFFLINE": |
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104 | close_socket = True |
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105 | skype.send(i.strip()) |
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106 | return not(close_socket) |
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107 | try: |
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108 | input = fd.recv(1024) |
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109 | except Exception, s: |
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110 | dprint("Warning, receiving 1024 bytes failed (%s)." % s) |
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111 | fd.close() |
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112 | return False |
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113 | for i in input.split("\n"): |
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114 | skype.send(i.strip()) |
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115 | return True |
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116 | |
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117 | def skype_idle_handler(skype): |
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118 | try: |
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119 | c = skype.skype.Command("PING", Block=True) |
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120 | skype.skype.SendCommand(c) |
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121 | except (Skype4Py.SkypeAPIError, AttributeError), s: |
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122 | dprint("Warning, pinging Skype failed (%s)." % (s)) |
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123 | time.sleep(1) |
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124 | return True |
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125 | |
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126 | def send(sock, txt, tries=10): |
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127 | global options |
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128 | if hasgobject: |
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129 | if not options.conn: return |
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130 | try: |
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131 | sock.sendall(txt) |
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132 | except socket.error as s: |
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133 | dprint("Warning, sending '%s' failed (%s)." % (txt, s)) |
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134 | options.conn.close() |
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135 | options.conn = False |
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136 | else: |
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137 | for attempt in xrange(1, tries+1): |
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138 | if not options.conn: break |
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139 | if wait_for_lock(options.lock, 3, 10, "socket send"): |
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140 | try: |
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141 | if options.conn: sock.sendall(txt) |
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142 | options.lock.release() |
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143 | except socket.error as s: |
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144 | options.lock.release() |
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145 | dprint("Warning, sending '%s' failed (%s). count=%d" % (txt, s, count)) |
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146 | time.sleep(1) |
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147 | else: |
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148 | break |
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149 | else: |
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150 | if options.conn: |
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151 | options.conn.close() |
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152 | options.conn = False |
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153 | return done |
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154 | |
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155 | def bitlbee_idle_handler(skype): |
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156 | global options |
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157 | done = False |
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158 | if options.conn: |
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159 | try: |
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160 | e = "PING" |
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161 | done = send(options.conn, "%s\n" % e) |
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162 | except Exception, s: |
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163 | dprint("Warning, sending '%s' failed (%s)." % (e, s)) |
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164 | if hasgobject: |
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165 | options.conn.close() |
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166 | else: |
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167 | if options.conn: options.conn.close() |
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168 | options.conn = False |
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169 | done = False |
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170 | if hasgobject: |
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171 | return True |
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172 | else: |
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173 | return done |
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174 | return True |
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175 | |
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176 | def server(host, port, skype = None): |
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177 | global options |
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178 | if ":" in host: |
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179 | sock = socket.socket(socket.AF_INET6) |
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180 | else: |
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181 | sock = socket.socket() |
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182 | sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) |
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183 | fcntl(sock, F_SETFD, FD_CLOEXEC); |
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184 | sock.bind((host, port)) |
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185 | sock.listen(1) |
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186 | |
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187 | if hasgobject: |
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188 | gobject.io_add_watch(sock, gobject.IO_IN, listener) |
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189 | else: |
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190 | dprint("Waiting for connection...") |
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191 | listener(sock, skype) |
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192 | |
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193 | def listener(sock, skype): |
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194 | global options |
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195 | if not hasgobject: |
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196 | if not(wait_for_lock(options.lock, 3, 10, "listener")): return False |
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197 | rawsock, addr = sock.accept() |
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198 | try: |
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199 | options.conn = ssl.wrap_socket(rawsock, |
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200 | server_side=True, |
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201 | certfile=options.config.sslcert, |
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202 | keyfile=options.config.sslkey, |
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203 | ssl_version=ssl.PROTOCOL_TLSv1) |
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204 | except (ssl.SSLError, socket.error) as err: |
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205 | if isinstance(err, ssl.SSLError): |
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206 | dprint("Warning, SSL init failed, did you create your certificate?") |
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207 | return False |
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208 | else: |
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209 | dprint('Warning, SSL init failed') |
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210 | return True |
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211 | if hasattr(options.conn, 'handshake'): |
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212 | try: |
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213 | options.conn.handshake() |
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214 | except Exception: |
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215 | if not hasgobject: |
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216 | options.lock.release() |
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217 | dprint("Warning, handshake failed, closing connection.") |
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218 | return False |
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219 | ret = 0 |
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220 | try: |
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221 | line = options.conn.recv(1024) |
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222 | if line.startswith("USERNAME") and line.split(' ')[1].strip() == options.config.username: |
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223 | ret += 1 |
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224 | line = options.conn.recv(1024) |
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225 | if line.startswith("PASSWORD") and hashlib.sha1(line.split(' ')[1].strip()).hexdigest() == options.config.password: |
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226 | ret += 1 |
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227 | except Exception, s: |
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228 | dprint("Warning, receiving 1024 bytes failed (%s)." % s) |
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229 | options.conn.close() |
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230 | if not hasgobject: |
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231 | options.conn = False |
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232 | options.lock.release() |
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233 | return False |
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234 | if ret == 2: |
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235 | dprint("Username and password OK.") |
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236 | options.conn.send("PASSWORD OK\n") |
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237 | if hasgobject: |
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238 | gobject.io_add_watch(options.conn, gobject.IO_IN, input_handler) |
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239 | else: |
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240 | options.lock.release() |
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241 | serverloop(options, skype) |
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242 | return True |
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243 | else: |
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244 | dprint("Username and/or password WRONG.") |
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245 | options.conn.send("PASSWORD KO\n") |
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246 | if not hasgobject: |
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247 | options.conn.close() |
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248 | options.conn = False |
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249 | options.lock.release() |
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250 | return False |
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251 | |
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252 | def dprint(msg): |
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253 | from time import strftime |
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254 | global options |
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255 | |
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256 | now = strftime("%Y-%m-%d %H:%M:%S") |
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257 | |
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258 | if options.debug: |
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259 | try: |
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260 | print now + ": " + msg |
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261 | except Exception, s: |
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262 | try: |
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263 | sanitized = msg.encode("ascii", "backslashreplace") |
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264 | except Error, s: |
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265 | try: |
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266 | sanitized = "hex [" + msg.encode("hex") + "]" |
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267 | except Error, s: |
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268 | sanitized = "[unable to print debug message]" |
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269 | print now + "~=" + sanitized |
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270 | sys.stdout.flush() |
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271 | if options.log: |
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272 | sock = open(options.log, "a") |
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273 | sock.write("%s: %s\n" % (now, msg)) |
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274 | sock.close() |
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275 | |
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276 | class MockedSkype: |
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277 | """Mock class for Skype4Py.Skype(), in case the -m option is used.""" |
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278 | def __init__(self, mock): |
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279 | sock = open(mock) |
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280 | self.lines = sock.readlines() |
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281 | |
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282 | def SendCommand(self, c): |
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283 | pass |
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284 | |
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285 | def Command(self, msg, Block): |
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286 | if msg == "PING": |
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287 | return ["PONG"] |
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288 | line = self.lines[0].strip() |
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289 | if not line.startswith(">> "): |
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290 | raise Exception("Corrupted mock input") |
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291 | line = line[3:] |
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292 | if line != msg: |
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293 | raise Exception("'%s' != '%s'" % (line, msg)) |
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294 | self.lines = self.lines[1:] # drop the expected incoming line |
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295 | ret = [] |
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296 | while True: |
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297 | # and now send back all the following lines, up to the next expected incoming line |
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298 | if len(self.lines) == 0: |
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299 | break |
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300 | if self.lines[0].startswith(">> "): |
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301 | break |
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302 | if not self.lines[0].startswith("<< "): |
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303 | raise Exception("Corrupted mock input") |
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304 | ret.append(self.lines[0][3:].strip()) |
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305 | self.lines = self.lines[1:] |
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306 | return ret |
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307 | |
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308 | class SkypeApi: |
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309 | def __init__(self, mock): |
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310 | global options |
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311 | if not mock: |
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312 | self.skype = Skype4Py.Skype() |
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313 | self.skype.OnNotify = self.recv |
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314 | if not options.dont_start_skype: |
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315 | self.skype.Client.Start() |
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316 | else: |
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317 | self.skype = MockedSkype(mock) |
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318 | |
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319 | def recv(self, msg_text): |
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320 | global options |
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321 | if msg_text == "PONG": |
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322 | return |
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323 | if "\n" in msg_text: |
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324 | # crappy skype prefixes only the first line for |
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325 | # multiline messages so we need to do so for the other |
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326 | # lines, too. this is something like: |
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327 | # 'CHATMESSAGE id BODY first line\nsecond line' -> |
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328 | # 'CHATMESSAGE id BODY first line\nCHATMESSAGE id BODY second line' |
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329 | prefix = " ".join(msg_text.split(" ")[:3]) |
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330 | msg_text = ["%s %s" % (prefix, i) for i in " ".join(msg_text.split(" ")[3:]).split("\n")] |
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331 | else: |
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332 | msg_text = [msg_text] |
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333 | for i in msg_text: |
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334 | try: |
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335 | # Internally, BitlBee always uses UTF-8 and encodes/decodes as |
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336 | # necessary to communicate with the IRC client; thus send the |
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337 | # UTF-8 it expects |
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338 | e = i.encode('UTF-8') |
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339 | except: |
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340 | # Should never happen, but it's better to send difficult to |
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341 | # read data than crash because some message couldn't be encoded |
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342 | e = i.encode('ascii', 'backslashreplace') |
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343 | if options.conn: |
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344 | dprint('<< ' + e) |
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345 | try: |
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346 | send(options.conn, e + "\n") |
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347 | except Exception, s: |
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348 | dprint("Warning, sending '%s' failed (%s)." % (e, s)) |
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349 | if options.conn: options.conn.close() |
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350 | options.conn = False |
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351 | else: |
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352 | dprint('-- ' + e) |
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353 | |
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354 | def send(self, msg_text): |
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355 | if not len(msg_text) or msg_text == "PONG": |
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356 | if msg_text == "PONG": |
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357 | options.last_bitlbee_pong = time.time() |
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358 | return |
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359 | try: |
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360 | # Internally, BitlBee always uses UTF-8 and encodes/decodes as |
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361 | # necessary to communicate with the IRC client; thus decode the |
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362 | # UTF-8 it sent us |
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363 | e = msg_text.decode('UTF-8') |
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364 | except: |
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365 | # Should never happen, but it's better to send difficult to read |
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366 | # data to Skype than to crash |
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367 | e = msg_text.decode('ascii', 'backslashreplace') |
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368 | dprint('>> ' + e) |
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369 | try: |
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370 | c = self.skype.Command(e, Block=True) |
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371 | self.skype.SendCommand(c) |
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372 | if hasattr(c, "Reply"): |
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373 | self.recv(c.Reply) # Skype4Py answer |
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374 | else: |
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375 | for i in c: # mock may return multiple iterable answers |
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376 | self.recv(i) |
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377 | except Skype4Py.SkypeError: |
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378 | pass |
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379 | except Skype4Py.SkypeAPIError, s: |
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380 | dprint("Warning, sending '%s' failed (%s)." % (e, s)) |
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381 | |
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382 | |
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383 | def serverloop(options, skype): |
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384 | timeout = 1; # in seconds |
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385 | skype_ping_period = 5 |
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386 | bitlbee_ping_period = 10 |
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387 | bitlbee_pong_timeout = 30 |
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388 | now = time.time() |
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389 | skype_ping_start_time = now |
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390 | bitlbee_ping_start_time = now |
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391 | options.last_bitlbee_pong = now |
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392 | in_error = [] |
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393 | handler_ok = True |
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394 | while (len(in_error) == 0) and handler_ok and options.conn: |
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395 | ready_to_read, ready_to_write, in_error = \ |
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396 | select.select([options.conn], [], [options.conn], \ |
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397 | timeout) |
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398 | now = time.time() |
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399 | handler_ok = len(in_error) == 0 |
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400 | if (len(ready_to_read) == 1) and handler_ok: |
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401 | handler_ok = input_handler(ready_to_read.pop()) |
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402 | # don't ping bitlbee/skype if they already received data |
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403 | now = time.time() # allow for the input_handler to take some time |
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404 | bitlbee_ping_start_time = now |
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405 | skype_ping_start_time = now |
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406 | options.last_bitlbee_pong = now |
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407 | if (now - skype_ping_period > skype_ping_start_time) and handler_ok: |
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408 | handler_ok = skype_idle_handler(skype) |
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409 | skype_ping_start_time = now |
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410 | if now - bitlbee_ping_period > bitlbee_ping_start_time: |
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411 | handler_ok = bitlbee_idle_handler(skype) |
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412 | bitlbee_ping_start_time = now |
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413 | if options.last_bitlbee_pong: |
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414 | if (now - options.last_bitlbee_pong) > bitlbee_pong_timeout: |
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415 | dprint("Bitlbee pong timeout") |
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416 | # TODO is following line necessary? Should there be a options.conn.unwrap() somewhere? |
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417 | # options.conn.shutdown() |
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418 | if options.conn: |
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419 | options.conn.close() |
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420 | options.conn = False |
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421 | else: |
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422 | options.last_bitlbee_pong = now |
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423 | |
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424 | |
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425 | def main(args=None): |
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426 | global options |
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427 | global skype |
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428 | |
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429 | cfgpath = os.path.join(os.environ['HOME'], ".skyped", "skyped.conf") |
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430 | syscfgpath = "/usr/local/etc/skyped/skyped.conf" |
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431 | if not os.path.exists(cfgpath) and os.path.exists(syscfgpath): |
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432 | cfgpath = syscfgpath # fall back to system-wide settings |
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433 | port = 2727 |
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434 | |
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435 | import argparse |
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436 | parser = argparse.ArgumentParser() |
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437 | parser.add_argument('-c', '--config', |
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438 | metavar='path', default=cfgpath, |
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439 | help='path to configuration file (default: %(default)s)') |
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440 | parser.add_argument('-H', '--host', default='0.0.0.0', |
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441 | help='set the tcp host, supports IPv4 and IPv6 (default: %(default)s)') |
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442 | parser.add_argument('-p', '--port', type=int, |
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443 | help='set the tcp port (default: %(default)s)') |
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444 | parser.add_argument('-l', '--log', metavar='path', |
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445 | help='set the log file in background mode (default: none)') |
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446 | parser.add_argument('-v', '--version', action='store_true', help='display version information') |
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447 | parser.add_argument('-n', '--nofork', |
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448 | action='store_true', help="don't run as daemon in the background") |
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449 | parser.add_argument('-s', '--dont-start-skype', action='store_true', |
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450 | help="assume that skype is running independently, don't try to start/stop it") |
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451 | parser.add_argument('-m', '--mock', help='fake interactions with skype (only useful for tests)') |
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452 | parser.add_argument('-d', '--debug', action='store_true', help='enable debug messages') |
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453 | options = parser.parse_args(sys.argv[1:] if args is None else args) |
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454 | |
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455 | if options.version: |
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456 | print "skyped %s" % __version__ |
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457 | sys.exit(0) |
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458 | |
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459 | # well, this is a bit hackish. we store the socket of the last connected client |
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460 | # here and notify it. maybe later notify all connected clients? |
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461 | options.conn = None |
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462 | # this will be read first by the input handler |
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463 | options.buf = None |
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464 | |
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465 | if not os.path.exists(options.config): |
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466 | parser.error(( "Can't find configuration file at '%s'." |
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467 | "Use the -c option to specify an alternate one." )% options.config) |
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468 | |
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469 | cfgpath = options.config |
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470 | options.config = ConfigParser() |
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471 | options.config.read(cfgpath) |
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472 | options.config.username = options.config.get('skyped', 'username').split('#', 1)[0] |
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473 | options.config.password = options.config.get('skyped', 'password').split('#', 1)[0] |
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474 | options.config.sslkey = os.path.expanduser(options.config.get('skyped', 'key').split('#', 1)[0]) |
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475 | options.config.sslcert = os.path.expanduser(options.config.get('skyped', 'cert').split('#', 1)[0]) |
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476 | |
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477 | # hack: we have to parse the parameters first to locate the |
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478 | # config file but the -p option should overwrite the value from |
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479 | # the config file |
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480 | try: |
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481 | options.config.port = int(options.config.get('skyped', 'port').split('#', 1)[0]) |
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482 | if not options.port: |
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483 | options.port = options.config.port |
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484 | except NoOptionError: |
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485 | pass |
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486 | if not options.port: |
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487 | options.port = port |
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488 | dprint("Parsing config file '%s' done, username is '%s'." % (cfgpath, options.config.username)) |
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489 | if not options.nofork: |
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490 | pid = os.fork() |
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491 | if pid == 0: |
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492 | nullin = file(os.devnull, 'r') |
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493 | nullout = file(os.devnull, 'w') |
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494 | os.dup2(nullin.fileno(), sys.stdin.fileno()) |
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495 | os.dup2(nullout.fileno(), sys.stdout.fileno()) |
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496 | os.dup2(nullout.fileno(), sys.stderr.fileno()) |
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497 | else: |
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498 | print 'skyped is started on port %s, pid: %d' % (options.port, pid) |
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499 | sys.exit(0) |
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500 | else: |
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501 | dprint('skyped is started on port %s' % options.port) |
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502 | if hasgobject: |
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503 | server(options.host, options.port) |
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504 | try: |
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505 | skype = SkypeApi(options.mock) |
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506 | except Skype4Py.SkypeAPIError, s: |
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507 | sys.exit("%s. Are you sure you have started Skype?" % s) |
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508 | if hasgobject: |
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509 | gobject.timeout_add(2000, skype_idle_handler, skype) |
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510 | gobject.timeout_add(60000, bitlbee_idle_handler, skype) |
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511 | gobject.MainLoop().run() |
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512 | else: |
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513 | while 1: |
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514 | options.conn = False |
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515 | options.lock = threading.Lock() |
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516 | server(options.host, options.port, skype) |
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517 | |
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518 | |
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519 | if __name__ == '__main__': main() |
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