bot.py

   1 #!/usr/bin/python
   2 # vim: fileencoding=utf-8
   3
   4 # Erebus IRC bot - Author: John Runyon
   5 # "Bot" and "BotConnection" classes (handling a specific "arm")
   6
   7 import socket, sys, time, threading, os, random
   8 from collections import deque
   9
  10 MAXLEN = 400 # arbitrary max length of a command generated by Bot.msg functions
  11
  12 if sys.version_info.major < 3:
  13         timerbase = threading._Timer
  14         stringbase = basestring
  15 else:
  16         timerbase = threading.Timer
  17         stringbase = str
  18 class MyTimer(timerbase):
  19         def __init__(self, *args, **kwargs):
  20                 timerbase.__init__(self, *args, **kwargs)
  21                 self.daemon = True
  22
  23 if sys.version_info.major < 3:
  24         stringbase = basestring
  25 else:
  26         stringbase = str
  27
  28 #bots = {'erebus': bot.Bot(nick='Erebus', user='erebus', bind='', server='irc.quakenet.org', port=6667, realname='Erebus')}
  29 class Bot(object):
  30         def __init__(self, parent, nick, user, bind, authname, authpass, server, port, realname):
  31                 self.parent = parent
  32                 self.nick = nick
  33                 self.permnick = nick
  34                 self.user = user
  35                 self.realname = realname
  36
  37                 self.authname = authname
  38                 self.authpass = authpass
  39
  40                 curs = self.parent.query("SELECT chname FROM chans WHERE bot = %s AND active = 1", (self.nick,))
  41                 if curs:
  42                         chansres = curs.fetchall()
  43                         curs.close()
  44                         self.chans = [self.parent.newchannel(self, row['chname']) for row in chansres]
  45                 else:
  46                         self.chans = []
  47
  48                 self.conn = BotConnection(self, bind, server, port)
  49
  50                 self.lastreceived = time.time() #time we last received a line from the server
  51                 self.watchdog()
  52
  53                 self.msgqueue = deque()
  54                 self.slowmsgqueue = deque()
  55                 self.makemsgtimer()
  56                 self.msgtimer.start()
  57
  58         def __del__(self):
  59                 try:
  60                         curs = self.parent.query("UPDATE bots SET connected = 0 WHERE nick = %s", (self.nick,))
  61                         curs.close()
  62                 except: pass
  63
  64         def watchdog(self):
  65                 if time.time() > int(self.parent.cfg.get('watchdog', 'maxtime', default=300))+self.lastreceived:
  66                         self.parse("ERROR :Fake-error from watchdog timer.")
  67                 self.watchdogtimer = MyTimer(int(self.parent.cfg.get('watchdog', 'interval', default=30)), self.watchdog)
  68
  69         def log(self, *args, **kwargs):
  70                 self.parent.log(self.nick, *args, **kwargs)
  71
  72         def connect(self):
  73                 if self.conn.connect():
  74                         self.parent.newfd(self, self.conn.socket.fileno())
  75
  76         def getdata(self):
  77                 self.lastreceived = time.time()
  78                 return self.conn.read()
  79
  80         def _checknick(self): # check if we're using the right nick, try changing
  81                 if self.nick != self.permnick and self.conn.registered():
  82                         self.conn.send("NICK %s" % (self.permnick))
  83
  84         def parse(self, line):
  85                 if self.parent.cfg.getboolean('debug', 'io'):
  86                         self.log('I', line)
  87                 pieces = line.split()
  88
  89                 # dispatch dict
  90                 zero = { #things to look for without source
  91                         'NOTICE': self._gotconnected,
  92                         'PING': self._gotping,
  93                         'ERROR': self._goterror,
  94                 }
  95                 one = { #things to look for after source
  96                         'NOTICE': self._gotconnected,
  97                         '001': self._got001,
  98                         '376': self._gotRegistered,
  99                         '422': self._gotRegistered,
 100                         'PRIVMSG': self._gotprivmsg,
 101                         '353': self._got353, #NAMES
 102                         '354': self._got354, #WHO
 103                         '433': self._got433, #nick in use
 104                         'JOIN': self._gotjoin,
 105                         'PART': self._gotpart,
 106                         'KICK': self._gotkick,
 107                         'QUIT': self._gotquit,
 108                         'NICK': self._gotnick,
 109                         'MODE': self._gotmode,
 110                 }
 111
 112                 if self.parent.hasnumhook(pieces[1]):
 113                         hooks = self.parent.getnumhook(pieces[1])
 114                         for callback in hooks:
 115                                 try:
 116                                         callback(self, line)
 117                                 except Exception:
 118                                         self.__debug_cbexception("numhook", line)
 119
 120                 if pieces[0] in zero:
 121                         zero[pieces[0]](pieces)
 122                 elif pieces[1] in one:
 123                         one[pieces[1]](pieces)
 124
 125         def _gotconnected(self, pieces):
 126                 if not self.conn.registered():
 127                         self.conn.register()
 128         def _gotping(self, pieces):
 129                 self.conn.send("PONG %s" % (pieces[1]))
 130                 self._checknick()
 131         def _goterror(self, pieces):
 132                 # TODO: better handling, just reconnect that single bot
 133                 try:
 134                         self.quit("Error detected: %s" % ' '.join(pieces))
 135                 except: pass
 136                 try:
 137                         curs = self.parent.query("UPDATE bots SET connected = 0")
 138                         curs.close()
 139                 except: pass
 140                 sys.exit(2)
 141                 os._exit(2)
 142         def _got001(self, pieces):
 143                 pass # wait until the end of MOTD instead
 144         def _gotRegistered(self, pieces):
 145                 self.conn.registered(True)
 146
 147                 curs = self.parent.query("UPDATE bots SET connected = 1 WHERE nick = %s", (self.nick,))
 148                 if curs: curs.close()
 149
 150                 self.conn.send("MODE %s +x" % (pieces[2]))
 151                 if self.authname is not None and self.authpass is not None:
 152                         self.conn.send("AUTH %s %s" % (self.authname, self.authpass))
 153                 for c in self.chans:
 154                         self.join(c.name)
 155         def _gotprivmsg(self, pieces):
 156                 nick = pieces[0].split('!')[0][1:]
 157                 user = self.parent.user(nick)
 158                 target = pieces[2]
 159                 msg = ' '.join(pieces[3:])[1:]
 160                 self.parsemsg(user, target, msg)
 161         def _got353(self, pieces):
 162                 prefixes = {'@': 'op', '+': 'voice'}
 163                 chan = self.parent.channel(pieces[4])
 164                 names = pieces[5:]
 165                 names[0] = names[0][1:] #remove colon
 166                 for n in names:
 167                         if n[0] in prefixes:
 168                                 user = self.parent.user(n[1:])
 169                                 chan.userjoin(user, prefixes[n[0]])
 170                         else:
 171                                 user = self.parent.user(n)
 172                                 chan.userjoin(user)
 173                         user.join(chan)
 174         def _got354(self, pieces):
 175                 qt = int(pieces[3])
 176                 if qt < 3:
 177                         nick, auth = pieces[4:6]
 178                         chan = None
 179                 else:
 180                         chan, nick, auth = pieces[4:7]
 181                         chan = self.parent.channel(chan)
 182                 user = self.parent.user(nick)
 183                 user.authed(auth)
 184
 185                 if chan is not None:
 186                         user.join(chan)
 187                         chan.userjoin(user)
 188
 189                 if qt == 2: # triggered by !auth
 190                         if user.isauthed():
 191                                 if user.glevel > 0:
 192                                         self.msg(nick, "You are now known as #%s (access level: %s)" % (auth, user.glevel))
 193                                 else:
 194                                         self.msg(nick, "You are now known as #%s (not staff)" % (auth))
 195                         else:
 196                                 self.msg(nick, "I tried, but you're not authed!")
 197         def _got433(self, pieces):
 198                 if not self.conn.registered(): #we're trying to connect
 199                         newnick = "%s%d" % (self.nick, random.randint(111, 999))
 200                         self.conn.send("NICK %s" % (newnick))
 201                         self.nick = newnick
 202         def _gotjoin(self, pieces):
 203                 nick = pieces[0].split('!')[0][1:]
 204                 chan = self.parent.channel(pieces[2])
 205
 206                 if nick == self.nick:
 207                         self.conn.send("WHO %s c%%cant,3" % (chan))
 208                 else:
 209                         user = self.parent.user(nick, justjoined=True)
 210                         chan.userjoin(user)
 211                         user.join(chan)
 212         def _clientLeft(self, nick, chan):
 213                 if nick != self.nick:
 214                         gone = self.parent.user(nick).part(chan)
 215                         chan.userpart(self.parent.user(nick))
 216                         if gone:
 217                                 self.parent.user(nick).quit()
 218                                 del self.parent.users[nick.lower()]
 219         def _gotpart(self, pieces):
 220                 nick = pieces[0].split('!')[0][1:]
 221                 chan = self.parent.channel(pieces[2])
 222                 self._clientLeft(nick, chan)
 223         def _gotkick(self, pieces):
 224                 nick = pieces[3]
 225                 chan = self.parent.channel(pieces[2])
 226                 self._clientLeft(nick, chan)
 227         def _gotquit(self, pieces):
 228                 nick = pieces[0].split('!')[0][1:]
 229                 if nick != self.nick:
 230                         for chan in self.parent.user(nick).chans:
 231                                 chan.userpart(self.parent.user(nick))
 232                         self.parent.user(nick).quit()
 233                         del self.parent.users[nick.lower()]
 234         def _gotnick(self, pieces):
 235                 oldnick = pieces[0].split('!')[0][1:]
 236                 newnick = pieces[2][1:]
 237                 if newnick.lower() != oldnick.lower():
 238                         self.parent.users[newnick.lower()] = self.parent.users[oldnick.lower()]
 239                         del self.parent.users[oldnick.lower()]
 240                 self.parent.users[newnick.lower()].nickchange(newnick)
 241         def _gotmode(self, pieces):
 242                 source = pieces[0].split('!')[0][1:]
 243                 chan = pieces[2]
 244                 if not chan.startswith("#"): return
 245                 chan = self.parent.channel(pieces[2])
 246                 mode = pieces[3]
 247                 args = pieces[4:]
 248
 249                 adding = True
 250                 for c in mode:
 251                         if c == '+':
 252                                 adding = True
 253                         elif c == '-':
 254                                 adding = False
 255                         elif c == 'o':
 256                                 if adding:
 257                                         chan.userop(self.parent.user(args.pop(0)))
 258                                 else:
 259                                         chan.userdeop(self.parent.user(args.pop(0)))
 260                         elif c == 'v':
 261                                 if adding:
 262                                         chan.uservoice(self.parent.user(args.pop(0)))
 263                                 else:
 264                                         chan.userdevoice(self.parent.user(args.pop(0)))
 265                         else:
 266                                 pass # don't care about other modes
 267
 268         def __debug_cbexception(self, source, *args, **kwargs):
 269                 if self.parent.cfg.getboolean('debug', 'cbexc'):
 270                         self.conn.send("PRIVMSG %s :%09.3f \ 34\1f!!! CBEXC\1f\ 3 %s" % (self.parent.cfg.get('debug', 'owner'), time.time() % 100000, source))
 271                         __import__('traceback').print_exc()
 272                         self.log('!', "CBEXC %s %r %r" % (source, args, kwargs))
 273 #                       print "%09.3f %s [!] CBEXC %s %r %r" % (time.time() % 100000, self.nick, source, args, kwargs)
 274
 275
 276         def parsemsg(self, user, target, msg):
 277                 if user.glevel <= -2: return # short circuit if user is IGNORED
 278                 chan = None
 279                 chanparam = None # was the channel specified as part of the command?
 280                 if len(msg) == 0:
 281                         return
 282
 283                 if target == self.nick:
 284                         if msg.startswith("\001"): #ctcp
 285                                 msg = msg.strip("\001")
 286                                 if msg == "VERSION":
 287                                         self.msg(user, "\001VERSION Erebus v%d.%d - http://github.com/zonidjan/erebus" % (self.parent.APIVERSION, self.parent.RELEASE))
 288                                 return
 289
 290                 triggerused = msg.startswith(self.parent.trigger)
 291                 if triggerused: msg = msg[len(self.parent.trigger):]
 292                 pieces = msg.split()
 293
 294                 if len(pieces) == 0:
 295                         return
 296
 297                 if target != self.nick: # message was sent to a channel
 298                         try:
 299                                 if pieces[0][:-1].lower() == self.nick.lower() and (pieces[0][-1] == ":" or pieces[0][-1] == ","):
 300                                         pieces.pop(0) # command actually starts with next word
 301                                         if len(pieces) == 0: # is there still anything left?
 302                                                 return
 303                                         msg = ' '.join(pieces)
 304                                         triggerused = True
 305                         except IndexError:
 306                                 return # "message" is empty
 307
 308                 if len(pieces) > 1:
 309                         chanword = pieces[1]
 310                         if chanword.startswith('#'):
 311                                 chanparam = self.parent.channel(chanword)
 312
 313                 if target != self.nick: # message was sent to a channel
 314                         chan = self.parent.channel(target)
 315                         if not triggerused:
 316                                 if self.parent.haschanhook(target.lower()):
 317                                         for callback in self.parent.getchanhook(target.lower()):
 318                                                 try:
 319                                                         cbret = callback(self, user, chan, *pieces)
 320                                                 except NotImplementedError:
 321                                                         self.msg(user, "Command not implemented.")
 322                                                 except:
 323                                                         self.msg(user, "Command failed. Code: CBEXC%09.3f" % (time.time() % 100000))
 324                                                         self.__debug_cbexception("chanhook", user=user, target=target, msg=msg)
 325                                 return # not to bot, don't process!
 326
 327                 cmd = pieces[0].lower()
 328                 rancmd = False
 329                 if self.parent.hashook(cmd):
 330                         for callback in self.parent.gethook(cmd):
 331                                 if chanparam is not None and (callback.needchan or callback.wantchan):
 332                                         chan = chanparam
 333                                         pieces.pop(1)
 334                                 if chan is None and callback.needchan:
 335                                         rancmd = True
 336                                         self.msg(user, "You need to specify a channel for that command.")
 337                                 elif user.glevel >= callback.reqglevel and (not callback.needchan or chan.levelof(user.auth) >= callback.reqclevel):
 338                                         rancmd = True
 339                                         try:
 340                                                 cbret = callback(self, user, chan, target, *pieces[1:])
 341                                                 if cbret is NotImplemented:
 342                                                         raise NotImplementedError
 343                                                 elif isinstance(cbret, stringbase):
 344                                                         self.reply(chan, user, cbret)
 345                                         except NotImplementedError:
 346                                                 self.msg(user, "Command not implemented.")
 347                                         except Exception:
 348                                                 self.msg(user, "Command failed. Code: CBEXC%09.3f" % (time.time() % 100000))
 349                                                 self.__debug_cbexception("hook", user=user, target=target, msg=msg)
 350                                         except SystemExit as e:
 351                                                 try:
 352                                                         curs = self.parent.query("UPDATE bots SET connected = 0")
 353                                                         curs.close()
 354                                                 except: pass
 355                                                 raise e
 356                 else:
 357                         rancmd = True
 358                         self.msg(user, "I don't know that command.")
 359                 if not rancmd:
 360                         self.msg(user, "You don't have enough access to run that command.")
 361
 362         def __debug_nomsg(self, target, msg):
 363                 if self.parent.cfg.getboolean('debug', 'nomsg'):
 364                         self.conn.send("PRIVMSG %s :%09.3f \ 34\1f!!! NOMSG\1f\ 3 %r, %r" % (self.parent.cfg.get('debug', 'owner'), time.time() % 100000, target, msg))
 365                         self.log('!', "!!! NOMSG")
 366 #                       print "%09.3f %s [!] %s" % (time.time() % 100000, self.nick, "!!! NOMSG")
 367                         __import__('traceback').print_stack()
 368
 369
 370         def reply(self, chan, user, msg):
 371                 if chan is not None:
 372                         self.msg(chan, "%s: %s" % (user, msg))
 373                 else:
 374                         self.msg(user, msg)
 375
 376         def msg(self, target, msg, truncate=False):
 377                 if self.parent.cfg.getboolean('erebus', 'nofakelag'): return self.fastmsg(target, msg)
 378                 cmd = self._formatmsg(target, msg)
 379                 if len(cmd) > MAXLEN:
 380                         if not truncate:
 381                                 return False
 382                         else:
 383                                 cmd = cmd[:MAXLEN]
 384                 if self.conn.exceeded or self.conn.bytessent+len(cmd) >= self.conn.recvq:
 385                         self.msgqueue.append(cmd)
 386                 else:
 387                         self.conn.send(cmd)
 388                 self.conn.exceeded = True
 389                 return True
 390
 391         def slowmsg(self, target, msg, truncate=False):
 392                 if self.parent.cfg.getboolean('erebus', 'nofakelag'): return self.fastmsg(target, msg)
 393                 cmd = self._formatmsg(target, msg)
 394                 if len(cmd) > MAXLEN:
 395                         if not truncate:
 396                                 return False
 397                         else:
 398                                 cmd = cmd[:MAXLEN]
 399                 if self.conn.exceeded or self.conn.bytessent+len(cmd) >= self.conn.recvq:
 400                         self.slowmsgqueue.append(cmd)
 401                 else:
 402                         self.conn.send(cmd)
 403                 self.conn.exceeded = True
 404                 return True
 405
 406         def fastmsg(self, target, msg, truncate=False):
 407                 cmd = self._formatmsg(target, msg)
 408                 if len(cmd) > MAXLEN:
 409                         if not truncate:
 410                                 return False
 411                         else:
 412                                 cmd = cmd[:MAXLEN]
 413                 self.conn.send(cmd)
 414                 self.conn.exceeded = True
 415                 return True
 416
 417         def _formatmsg(self, target, msg):
 418                 if target is None or msg is None:
 419                         return self.__debug_nomsg(target, msg)
 420
 421                 target = str(target)
 422
 423                 if target.startswith('#'): command = "PRIVMSG %s :%s" % (target, msg)
 424                 else: command = "NOTICE %s :%s" % (target, msg)
 425
 426                 return command
 427
 428         def _popmsg(self):
 429                 self.makemsgtimer()
 430                 self.conn.bytessent -= self.conn.recvq/3
 431                 if self.conn.bytessent < 0: self.conn.bytessent = 0
 432                 self.conn.exceeded = False
 433
 434                 try:
 435                         cmd = self.msgqueue.popleft()
 436                         if not self.conn.exceeded and self.conn.bytessent+len(cmd) < self.conn.recvq:
 437                                 self.conn.send(cmd)
 438                                 self.conn.exceeded = True
 439                         else: raise IndexError
 440                 except IndexError:
 441                         try:
 442                                 cmd = self.slowmsgqueue.popleft()
 443                                 if not self.conn.exceeded and self.conn.bytessent+len(cmd) < self.conn.recvq:
 444                                         self.conn.send(cmd)
 445                                         self.conn.exceeded = True
 446                         except IndexError:
 447                                 pass
 448                 self.msgtimer.start()
 449
 450         def makemsgtimer(self):
 451                 self.msgtimer = threading.Timer(3, self._popmsg)
 452                 self.msgtimer.daemon = True
 453
 454         def join(self, chan):
 455                 self.conn.send("JOIN %s" % (chan))
 456
 457         def part(self, chan):
 458                 self.conn.send("PART %s" % (chan))
 459
 460         def quit(self, reason="Shutdown"):
 461                 self.conn.send("QUIT :%s" % (reason))
 462
 463         def __str__(self): return self.nick
 464         def __repr__(self): return "<Bot %r>" % (self.nick)
 465
 466 class BotConnection(object):
 467         def __init__(self, parent, bind, server, port):
 468                 self.parent = parent
 469                 self.buffer = bytearray(8192)
 470                 self.socket = None
 471
 472                 self.bind = bind
 473                 self.server = server
 474                 self.port = int(port)
 475
 476                 self.state = 0 # 0=disconnected, 1=registering, 2=connected
 477
 478                 self.bytessent = 0
 479                 self.recvq = 500
 480                 self.exceeded = False
 481
 482         def connect(self):
 483                 self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 484                 self.socket.bind((self.bind, 0))
 485                 self.socket.connect((self.server, self.port))
 486                 return True
 487         def register(self):
 488                 if self.state == 0:
 489                         self.send("NICK %s" % (self.parent.nick))
 490                         self.send("USER %s 0 * :%s" % (self.parent.user, self.parent.realname))
 491                         self.state = 1
 492                 return True
 493
 494         def registered(self, done=False):
 495                 if done: self.state = 2
 496                 return self.state == 2
 497
 498         def send(self, line):
 499                 if self.parent.parent.cfg.getboolean('debug', 'io'):
 500                         self.parent.log('O', line)
 501                 self.bytessent += len(line)
 502                 try:
 503                         self._write(line)
 504                 except socket.error as e:
 505                         self.parent._goterror(repr(e))
 506
 507         def _write(self, line):
 508                 self.socket.sendall(line.encode('utf-8', 'backslashreplace')+b"\r\n")
 509
 510         def read(self):
 511                 self.buffer += self.socket.recv(8192)
 512                 lines = []
 513
 514                 while b"\r\n" in self.buffer:
 515                         pieces = self.buffer.split(b"\r\n", 1)
 516                         lines.append(pieces[0].decode('utf-8', 'backslashreplace'))
 517                         self.buffer = pieces[1]
 518
 519                 return lines
 520
 521         def __str__(self): return self.parent.nick
 522         def __repr__(self): return "<BotConnection %r (%r)>" % (self.socket.fileno(), self.parent.nick)