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, 2008, 2009, 2010, 2011 by Miklos Vajna <vmiklos@frugalware.org> |
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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 locale |
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27 | import time |
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28 | import socket |
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29 | import getopt |
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30 | import Skype4Py |
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31 | import hashlib |
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32 | from ConfigParser import ConfigParser, NoOptionError |
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33 | from traceback import print_exception |
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34 | import ssl |
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35 | |
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36 | __version__ = "0.1.1" |
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37 | |
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38 | try: |
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39 | import gobject |
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40 | hasgobject = True |
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41 | except ImportError: |
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42 | import select |
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43 | import threading |
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44 | hasgobject = False |
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45 | |
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46 | def eh(type, value, tb): |
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47 | global options |
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48 | |
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49 | if type != KeyboardInterrupt: |
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50 | print_exception(type, value, tb) |
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51 | if hasgobject: |
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52 | gobject.MainLoop().quit() |
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53 | if options.conn: |
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54 | options.conn.close() |
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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, s: |
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122 | dprint("Warning, pinging Skype failed (%s)." % (s)) |
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123 | return True |
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124 | |
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125 | def send(sock, txt): |
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126 | global options |
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127 | from time import sleep |
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128 | count = 1 |
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129 | done = False |
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130 | if hasgobject: |
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131 | while (not done) and (count < 10): |
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132 | try: |
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133 | sock.send(txt) |
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134 | done = True |
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135 | except Exception, s: |
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136 | count += 1 |
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137 | dprint("Warning, sending '%s' failed (%s). count=%d" % (txt, s, count)) |
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138 | sleep(1) |
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139 | if not done: |
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140 | options.conn.close() |
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141 | else: |
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142 | while (not done) and (count < 10) and options.conn: |
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143 | if wait_for_lock(options.lock, 3, 10, "socket send"): |
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144 | try: |
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145 | if options.conn: sock.send(txt) |
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146 | options.lock.release() |
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147 | done = True |
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148 | except Exception, s: |
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149 | options.lock.release() |
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150 | count += 1 |
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151 | dprint("Warning, sending '%s' failed (%s). count=%d" % (txt, s, count)) |
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152 | sleep(1) |
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153 | if not done: |
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154 | if options.conn: |
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155 | options.conn.close() |
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156 | options.conn = False |
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157 | return done |
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158 | |
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159 | def bitlbee_idle_handler(skype): |
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160 | global options |
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161 | done = False |
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162 | if options.conn: |
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163 | try: |
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164 | e = "PING" |
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165 | done = send(options.conn, "%s\n" % e) |
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166 | except Exception, s: |
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167 | dprint("Warning, sending '%s' failed (%s)." % (e, s)) |
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168 | if hasgobject: |
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169 | options.conn.close() |
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170 | else: |
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171 | if options.conn: options.conn.close() |
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172 | options.conn = False |
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173 | done = False |
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174 | if hasgobject: |
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175 | return True |
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176 | else: |
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177 | return done |
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178 | return True |
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179 | |
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180 | def server(host, port, skype = None): |
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181 | global options |
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182 | sock = socket.socket() |
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183 | sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) |
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184 | sock.bind((host, port)) |
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185 | sock.listen(1) |
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186 | if hasgobject: |
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187 | gobject.io_add_watch(sock, gobject.IO_IN, listener) |
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188 | else: |
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189 | dprint("Waiting for connection...") |
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190 | listener(sock, skype) |
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191 | |
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192 | def listener(sock, skype): |
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193 | global options |
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194 | if not hasgobject: |
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195 | if not(wait_for_lock(options.lock, 3, 10, "listener")): return False |
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196 | rawsock, addr = sock.accept() |
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197 | options.conn = ssl.wrap_socket(rawsock, |
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198 | server_side=True, |
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199 | certfile=options.config.sslcert, |
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200 | keyfile=options.config.sslkey, |
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201 | ssl_version=ssl.PROTOCOL_TLSv1) |
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202 | if hasattr(options.conn, 'handshake'): |
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203 | try: |
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204 | options.conn.handshake() |
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205 | except Exception: |
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206 | if not hasgobject: |
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207 | options.lock.release() |
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208 | dprint("Warning, handshake failed, closing connection.") |
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209 | return False |
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210 | ret = 0 |
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211 | try: |
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212 | line = options.conn.recv(1024) |
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213 | if line.startswith("USERNAME") and line.split(' ')[1].strip() == options.config.username: |
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214 | ret += 1 |
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215 | line = options.conn.recv(1024) |
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216 | if line.startswith("PASSWORD") and hashlib.sha1(line.split(' ')[1].strip()).hexdigest() == options.config.password: |
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217 | ret += 1 |
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218 | except Exception, s: |
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219 | dprint("Warning, receiving 1024 bytes failed (%s)." % s) |
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220 | options.conn.close() |
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221 | if not hasgobject: |
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222 | options.conn = False |
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223 | options.lock.release() |
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224 | return False |
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225 | if ret == 2: |
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226 | dprint("Username and password OK.") |
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227 | options.conn.send("PASSWORD OK\n") |
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228 | if hasgobject: |
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229 | gobject.io_add_watch(options.conn, gobject.IO_IN, input_handler) |
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230 | else: |
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231 | options.lock.release() |
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232 | serverloop(options, skype) |
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233 | return True |
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234 | else: |
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235 | dprint("Username and/or password WRONG.") |
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236 | options.conn.send("PASSWORD KO\n") |
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237 | if not hasgobject: |
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238 | options.conn.close() |
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239 | options.conn = False |
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240 | options.lock.release() |
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241 | return False |
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242 | |
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243 | def dprint(msg): |
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244 | from time import strftime |
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245 | global options |
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246 | |
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247 | now = strftime("%Y-%m-%d %H:%M:%S") |
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248 | |
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249 | if options.debug: |
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250 | try: |
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251 | print now + ": " + msg |
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252 | except Exception, s: |
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253 | try: |
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254 | sanitized = msg.encode("ascii", "backslashreplace") |
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255 | except Error, s: |
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256 | try: |
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257 | sanitized = "hex [" + msg.encode("hex") + "]" |
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258 | except Error, s: |
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259 | sanitized = "[unable to print debug message]" |
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260 | print now + "~=" + sanitized |
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261 | sys.stdout.flush() |
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262 | if options.log: |
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263 | sock = open(options.log, "a") |
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264 | sock.write("%s: %s\n" % (now, msg)) |
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265 | sock.close() |
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266 | |
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267 | class SkypeApi: |
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268 | def __init__(self): |
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269 | self.skype = Skype4Py.Skype() |
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270 | self.skype.OnNotify = self.recv |
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271 | self.skype.Client.Start() |
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272 | |
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273 | def recv(self, msg_text): |
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274 | global options |
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275 | if msg_text == "PONG": |
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276 | return |
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277 | if "\n" in msg_text: |
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278 | # crappy skype prefixes only the first line for |
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279 | # multiline messages so we need to do so for the other |
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280 | # lines, too. this is something like: |
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281 | # 'CHATMESSAGE id BODY first line\nsecond line' -> |
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282 | # 'CHATMESSAGE id BODY first line\nCHATMESSAGE id BODY second line' |
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283 | prefix = " ".join(msg_text.split(" ")[:3]) |
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284 | msg_text = ["%s %s" % (prefix, i) for i in " ".join(msg_text.split(" ")[3:]).split("\n")] |
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285 | else: |
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286 | msg_text = [msg_text] |
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287 | for i in msg_text: |
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288 | try: |
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289 | # Internally, BitlBee always uses UTF-8 and encodes/decodes as |
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290 | # necessary to communicate with the IRC client; thus send the |
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291 | # UTF-8 it expects |
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292 | e = i.encode('UTF-8') |
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293 | except: |
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294 | # Should never happen, but it's better to send difficult to |
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295 | # read data than crash because some message couldn't be encoded |
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296 | e = i.encode('ascii', 'backslashreplace') |
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297 | if options.conn: |
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298 | dprint('<< ' + e) |
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299 | try: |
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300 | send(options.conn, e + "\n") |
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301 | except Exception, s: |
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302 | dprint("Warning, sending '%s' failed (%s)." % (e, s)) |
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303 | if options.conn: options.conn.close() |
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304 | options.conn = False |
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305 | else: |
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306 | dprint('-- ' + e) |
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307 | |
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308 | def send(self, msg_text): |
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309 | if not len(msg_text) or msg_text == "PONG": |
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310 | if msg_text == "PONG": |
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311 | options.last_bitlbee_pong = time.time() |
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312 | return |
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313 | try: |
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314 | # Internally, BitlBee always uses UTF-8 and encodes/decodes as |
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315 | # necessary to communicate with the IRC client; thus decode the |
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316 | # UTF-8 it sent us |
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317 | e = msg_text.decode('UTF-8') |
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318 | except: |
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319 | # Should never happen, but it's better to send difficult to read |
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320 | # data to Skype than to crash |
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321 | e = msg_text.decode('ascii', 'backslashreplace') |
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322 | dprint('>> ' + e) |
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323 | try: |
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324 | c = self.skype.Command(e, Block=True) |
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325 | self.skype.SendCommand(c) |
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326 | self.recv(c.Reply) |
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327 | except Skype4Py.SkypeError: |
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328 | pass |
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329 | except Skype4Py.SkypeAPIError, s: |
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330 | dprint("Warning, sending '%s' failed (%s)." % (e, s)) |
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331 | |
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332 | class Options: |
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333 | def __init__(self): |
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334 | self.cfgpath = os.path.join(os.environ['HOME'], ".skyped", "skyped.conf") |
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335 | # for backwards compatibility |
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336 | self.syscfgpath = "/usr/local/etc/skyped/skyped.conf" |
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337 | if os.path.exists(self.syscfgpath): |
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338 | self.cfgpath = self.syscfgpath |
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339 | self.daemon = True |
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340 | self.debug = False |
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341 | self.help = False |
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342 | self.host = "0.0.0.0" |
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343 | self.log = None |
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344 | self.port = None |
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345 | self.version = False |
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346 | # well, this is a bit hackish. we store the socket of the last connected client |
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347 | # here and notify it. maybe later notify all connected clients? |
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348 | self.conn = None |
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349 | # this will be read first by the input handler |
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350 | self.buf = None |
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351 | |
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352 | |
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353 | def usage(self, ret): |
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354 | print """Usage: skyped [OPTION]... |
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355 | |
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356 | skyped is a daemon that acts as a tcp server on top of a Skype instance. |
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357 | |
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358 | Options: |
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359 | -c --config path to configuration file (default: %s) |
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360 | -d --debug enable debug messages |
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361 | -h --help this help |
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362 | -H --host set the tcp host (default: %s) |
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363 | -l --log set the log file in background mode (default: none) |
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364 | -n --nofork don't run as daemon in the background |
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365 | -p --port set the tcp port (default: %s) |
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366 | -v --version display version information""" % (self.cfgpath, self.host, self.port) |
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367 | sys.exit(ret) |
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368 | |
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369 | def serverloop(options, skype): |
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370 | timeout = 1; # in seconds |
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371 | skype_ping_period = 5 |
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372 | bitlbee_ping_period = 10 |
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373 | bitlbee_pong_timeout = 30 |
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374 | now = time.time() |
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375 | skype_ping_start_time = now |
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376 | bitlbee_ping_start_time = now |
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377 | options.last_bitlbee_pong = now |
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378 | in_error = [] |
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379 | handler_ok = True |
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380 | while (len(in_error) == 0) and handler_ok and options.conn: |
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381 | ready_to_read, ready_to_write, in_error = \ |
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382 | select.select([options.conn], [], [options.conn], \ |
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383 | timeout) |
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384 | now = time.time() |
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385 | handler_ok = len(in_error) == 0 |
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386 | if (len(ready_to_read) == 1) and handler_ok: |
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387 | handler_ok = input_handler(ready_to_read.pop()) |
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388 | # don't ping bitlbee/skype if they already received data |
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389 | now = time.time() # allow for the input_handler to take some time |
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390 | bitlbee_ping_start_time = now |
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391 | skype_ping_start_time = now |
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392 | options.last_bitlbee_pong = now |
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393 | if (now - skype_ping_period > skype_ping_start_time) and handler_ok: |
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394 | handler_ok = skype_idle_handler(skype) |
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395 | skype_ping_start_time = now |
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396 | if now - bitlbee_ping_period > bitlbee_ping_start_time: |
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397 | handler_ok = bitlbee_idle_handler(skype) |
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398 | bitlbee_ping_start_time = now |
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399 | if options.last_bitlbee_pong: |
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400 | if (now - options.last_bitlbee_pong) > bitlbee_pong_timeout: |
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401 | dprint("Bitlbee pong timeout") |
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402 | # TODO is following line necessary? Should there be a options.conn.unwrap() somewhere? |
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403 | # options.conn.shutdown() |
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404 | if options.conn: |
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405 | options.conn.close() |
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406 | options.conn = False |
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407 | else: |
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408 | options.last_bitlbee_pong = now |
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409 | |
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410 | if __name__=='__main__': |
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411 | options = Options() |
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412 | try: |
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413 | opts, args = getopt.getopt(sys.argv[1:], "c:dhH:l:np:v", ["config=", "debug", "help", "host=", "log=", "nofork", "port=", "version"]) |
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414 | except getopt.GetoptError: |
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415 | options.usage(1) |
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416 | for opt, arg in opts: |
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417 | if opt in ("-c", "--config"): |
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418 | options.cfgpath = arg |
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419 | elif opt in ("-d", "--debug"): |
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420 | options.debug = True |
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421 | elif opt in ("-h", "--help"): |
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422 | options.help = True |
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423 | elif opt in ("-H", "--host"): |
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424 | options.host = arg |
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425 | elif opt in ("-l", "--log"): |
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426 | options.log = arg |
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427 | elif opt in ("-n", "--nofork"): |
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428 | options.daemon = False |
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429 | elif opt in ("-p", "--port"): |
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430 | options.port = int(arg) |
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431 | elif opt in ("-v", "--version"): |
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432 | options.version = True |
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433 | if options.help: |
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434 | options.usage(0) |
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435 | elif options.version: |
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436 | print "skyped %s" % __version__ |
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437 | sys.exit(0) |
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438 | # parse our config |
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439 | if not os.path.exists(options.cfgpath): |
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440 | print "Can't find configuration file at '%s'." % options.cfgpath |
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441 | print "Use the -c option to specify an alternate one." |
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442 | sys.exit(1) |
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443 | options.config = ConfigParser() |
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444 | options.config.read(options.cfgpath) |
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445 | options.config.username = options.config.get('skyped', 'username').split('#')[0] |
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446 | options.config.password = options.config.get('skyped', 'password').split('#')[0] |
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447 | options.config.sslkey = os.path.expanduser(options.config.get('skyped', 'key').split('#')[0]) |
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448 | options.config.sslcert = os.path.expanduser(options.config.get('skyped', 'cert').split('#')[0]) |
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449 | # hack: we have to parse the parameters first to locate the |
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450 | # config file but the -p option should overwrite the value from |
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451 | # the config file |
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452 | try: |
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453 | options.config.port = int(options.config.get('skyped', 'port').split('#')[0]) |
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454 | if not options.port: |
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455 | options.port = options.config.port |
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456 | except NoOptionError: |
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457 | pass |
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458 | if not options.port: |
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459 | options.port = 2727 |
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460 | dprint("Parsing config file '%s' done, username is '%s'." % (options.cfgpath, options.config.username)) |
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461 | if options.daemon: |
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462 | pid = os.fork() |
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463 | if pid == 0: |
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464 | nullin = file(os.devnull, 'r') |
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465 | nullout = file(os.devnull, 'w') |
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466 | os.dup2(nullin.fileno(), sys.stdin.fileno()) |
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467 | os.dup2(nullout.fileno(), sys.stdout.fileno()) |
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468 | os.dup2(nullout.fileno(), sys.stderr.fileno()) |
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469 | else: |
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470 | print 'skyped is started on port %s, pid: %d' % (options.port, pid) |
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471 | sys.exit(0) |
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472 | else: |
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473 | dprint('skyped is started on port %s' % options.port) |
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474 | if hasgobject: |
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475 | server(options.host, options.port) |
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476 | try: |
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477 | skype = SkypeApi() |
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478 | except Skype4Py.SkypeAPIError, s: |
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479 | sys.exit("%s. Are you sure you have started Skype?" % s) |
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480 | if hasgobject: |
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481 | gobject.timeout_add(2000, skype_idle_handler, skype) |
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482 | gobject.timeout_add(60000, bitlbee_idle_handler, skype) |
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483 | gobject.MainLoop().run() |
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484 | else: |
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485 | while 1: |
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486 | options.conn = False |
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487 | options.lock = threading.Lock() |
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488 | server(options.host, options.port, skype) |
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