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 os, random, socket, struct, sys, threading, time, traceback, fcntl
   8 from collections import deque
   9
  10 if sys.version_info.major < 3:
  11         timerbase = threading._Timer
  12         stringbase = basestring
  13 else:
  14         timerbase = threading.Timer
  15         stringbase = str
  16
  17 class MyTimer(timerbase):
  18         def __init__(self, *args, **kwargs):
  19                 timerbase.__init__(self, *args, **kwargs)
  20                 self.daemon = True
  21
  22 if sys.version_info.major < 3:
  23         stringbase = basestring
  24 else:
  25         stringbase = str
  26
  27 #bots = {'erebus': bot.Bot(nick='Erebus', user='erebus', bind='', server='irc.quakenet.org', port=6667, realname='Erebus')}
  28 class Bot(object):
  29         def __init__(self, parent, nick, user, bind, authname, authpass, server, port, realname):
  30                 self.maxlen = 510
  31
  32                 self.parent = parent
  33                 self.nick = nick
  34                 self.permnick = nick
  35                 self.user = user
  36                 self.realname = realname
  37
  38                 self.authname = authname
  39                 self.authpass = authpass
  40
  41                 self.connecttime = 0 # time at which we received numeric 001
  42                 self.server = server # the address we try to (re-)connect to
  43                 self.port = port
  44                 self.servername = server # the name of the server we got connected to
  45
  46                 curs = self.parent.query("SELECT chname FROM chans WHERE bot = %s AND active = 1", (self.permnick,))
  47                 if curs:
  48                         chansres = curs.fetchall()
  49                         curs.close()
  50                         self.chans = [self.parent.newchannel(self, row['chname']) for row in chansres]
  51                 else:
  52                         self.chans = []
  53
  54                 self.conn = BotConnection(self, bind, server, port)
  55
  56                 self.lastreceived = time.time() #time we last received a line from the server
  57                 self.watchdog()
  58
  59                 self.msgqueue = deque()
  60                 self.slowmsgqueue = deque()
  61                 self._makemsgtimer()
  62                 self._msgtimer.start()
  63                 self.joined_chans = False
  64
  65         def __del__(self):
  66                 try:
  67                         curs = self.parent.query("UPDATE bots SET connected = 0 WHERE nick = %s", (self.permnick,))
  68                         curs.close()
  69                 except: pass
  70
  71         def watchdog(self):
  72                 if time.time() > int(self.parent.cfg.get('watchdog', 'maxtime', default=300))+self.lastreceived:
  73                         self.parse("ERROR :Fake-error from watchdog timer.")
  74                         return
  75                 if self.conn.registered():
  76                         self.conn.send("PING :%s" % (time.time()))
  77                         self._checknick()
  78                 watchdogtimer = MyTimer(int(self.parent.cfg.get('watchdog', 'interval', default=30)), self.watchdog)
  79                 watchdogtimer.start()
  80
  81         def log(self, *args, **kwargs):
  82                 self.parent.log(self.nick, *args, **kwargs)
  83
  84         def connect(self):
  85                 self.log('!', "Connecting")
  86                 if self.conn.connect():
  87                         self.log('!', "Connected")
  88                         self.parent.newfd(self, self.conn.socket.fileno())
  89
  90         def getdata(self):
  91                 try:
  92                         recvd = self.conn.read()
  93                         self.lastreceived = time.time()
  94                         return recvd
  95                 except EOFError as e:
  96                         return [":%s ERROR :%s%r" % (self.nick, e.__class__.__name__, e.args)]
  97
  98         def _checknick(self): # check if we're using the right nick, try changing
  99                 if self.nick != self.permnick and self.conn.registered():
 100                         self.conn.send("NICK %s" % (self.permnick))
 101
 102         def parse(self, line):
 103                 pieces = line.split()
 104
 105                 if pieces[0][0] == ":":
 106                         numeric = pieces[1]
 107                 else:
 108                         numeric = pieces[0]
 109
 110                 # dispatch dict
 111                 dispatch = {
 112                         'NOTICE': self._gotconnected,
 113                         '001': self._got001,
 114                         '004': self._got004,
 115                         '376': self._gotRegistered,
 116                         '422': self._gotRegistered,
 117                         'PRIVMSG': self._gotprivmsg,
 118                         '353': self._got353, #NAMES
 119                         '354': self._got354, #WHO
 120                         '396': self._gotHiddenHost, # hidden host has been set
 121                         '433': self._got433, #nick in use
 122                         '437': self._got433, #nick protected
 123                         'JOIN': self._gotjoin,
 124                         'PART': self._gotpart,
 125                         'KICK': self._gotkick,
 126                         'QUIT': self._gotquit,
 127                         'NICK': self._gotnick,
 128                         'MODE': self._gotmode,
 129                         'PING': self._gotping,
 130                         'ERROR': self._goterror,
 131                 }
 132
 133                 if self.parent.hasnumhook(numeric):
 134                         hooks = self.parent.getnumhook(numeric)
 135                         for callback in hooks:
 136                                 try:
 137                                         callback(self, line)
 138                                 except Exception:
 139                                         self._cbexception("numhook", line)
 140
 141                 if numeric in dispatch:
 142                         dispatch[numeric](pieces)
 143
 144         def _gotconnected(self, pieces):
 145                 if not self.conn.registered():
 146                         self.conn.register()
 147         def _gotping(self, pieces):
 148                 self.conn.send("PONG %s" % (pieces[1]))
 149                 self._checknick()
 150         def _goterror(self, pieces):
 151                 # TODO: better handling, just reconnect that single bot
 152                 error = ' '.join(pieces)
 153                 try:
 154                         raise Exception(error)
 155                 except Exception as e:
 156                         self.parent.mustquit = e
 157                 try:
 158                         self.quit("Error detected: %s" % (error))
 159                 except: pass
 160                 try:
 161                         curs = self.parent.query("UPDATE bots SET connected = 0")
 162                         curs.close()
 163                 except: pass
 164                 self.log('!', 'Bot exiting due to: %s' % (error))
 165         def _got001(self, pieces):
 166                 # We wait until the end of MOTD instead to consider ourselves registered, but consider uptime as of 001
 167                 self.connecttime = time.time()
 168         def _got004(self, pieces):
 169                 self.servername = pieces[3]
 170         def _gotRegistered(self, pieces):
 171                 self.conn.registered(True)
 172
 173                 curs = self.parent.query("UPDATE bots SET connected = 1 WHERE nick = %s", (self.permnick,))
 174                 if curs: curs.close()
 175
 176                 self.conn.send("MODE %s +x" % (pieces[2]))
 177                 if self.authname is not None and self.authpass is not None:
 178                         self.conn.send(self.parent.cfg.get('erebus', 'auth_command', "AUTH %s %s") % (self.authname, self.authpass))
 179                 if not self.parent.cfg.getboolean('erebus', 'wait_for_hidden_host'):
 180                         for c in self.chans:
 181                                 self.join(c.name)
 182                         self.joined_chans = True
 183         def _gotHiddenHost(self, pieces):
 184                 if not self.joined_chans and self.parent.cfg.getboolean('erebus', 'wait_for_hidden_host'):
 185                         for c in self.chans:
 186                                 self.join(c.name)
 187                         self.joined_chans = True
 188         def _gotprivmsg(self, pieces):
 189                 nick = pieces[0].split('!')[0][1:]
 190                 user = self.parent.user(nick)
 191                 target = pieces[2]
 192                 msg = ' '.join(pieces[3:])[1:]
 193                 self.parsemsg(user, target, msg)
 194         def _got353(self, pieces):
 195                 prefixes = {'@': 'op', '+': 'voice'}
 196                 chan = self.parent.channel(pieces[4])
 197                 names = pieces[5:]
 198                 names[0] = names[0][1:] #remove colon
 199                 for n in names:
 200                         if n[0] in prefixes:
 201                                 user = self.parent.user(n[1:])
 202                                 chan.userjoin(user, prefixes[n[0]])
 203                         else:
 204                                 user = self.parent.user(n)
 205                                 chan.userjoin(user)
 206                         user.join(chan)
 207         def _got354(self, pieces):
 208                 qt = int(pieces[3])
 209                 if qt < 3:
 210                         nick, auth = pieces[4:6]
 211                         chan = None
 212                 else:
 213                         chan, nick, auth = pieces[4:7]
 214                         chan = self.parent.channel(chan)
 215                 user = self.parent.user(nick)
 216                 user.authed(auth)
 217
 218                 if chan is not None:
 219                         user.join(chan)
 220                         chan.userjoin(user)
 221
 222                 if qt == 2: # triggered by !auth
 223                         if user.isauthed():
 224                                 if user.glevel > 0:
 225                                         self.msg(nick, "You are now known as #%s (access level: %s)" % (auth, user.glevel))
 226                                 else:
 227                                         self.msg(nick, "You are now known as #%s (not staff)" % (auth))
 228                         else:
 229                                 self.msg(nick, "I tried, but you're not authed!")
 230         def _got433(self, pieces):
 231                 if not self.conn.registered(): #we're trying to connect
 232                         newnick = "%s%d" % (self.nick, random.randint(111, 999))
 233                         self.conn.send("NICK %s" % (newnick))
 234                         self.nick = newnick
 235         def _gotjoin(self, pieces):
 236                 nick = pieces[0].split('!')[0][1:]
 237                 chan = self.parent.channel(pieces[2])
 238
 239                 if nick == self.nick:
 240                         self.conn.send("WHO %s c%%cant,3" % (chan))
 241                 else:
 242                         user = self.parent.user(nick, send_who=True)
 243                         chan.userjoin(user)
 244                         user.join(chan)
 245         def _clientLeft(self, nick, chan):
 246                 if nick == self.nick:
 247                         for u in chan.users:
 248                                 if u.nick != self.nick:
 249                                         self._clientLeft(u.nick, chan)
 250                         if chan.deleting:
 251                                 chan.bot.chans.remove(chan)
 252                                 del self.parent.chans[chan.name.lower()]
 253                                 del chan
 254                 else:
 255                         user = self.parent.user(nick)
 256                         gone = user.part(chan)
 257                         chan.userpart(user)
 258                         if gone:
 259                                 user.quit()
 260                                 del self.parent.users[nick.lower()]
 261         def _gotpart(self, pieces):
 262                 nick = pieces[0].split('!')[0][1:]
 263                 chan = self.parent.channel(pieces[2])
 264                 self._clientLeft(nick, chan)
 265         def _gotkick(self, pieces):
 266                 nick = pieces[3]
 267                 chan = self.parent.channel(pieces[2])
 268                 self._clientLeft(nick, chan)
 269         def _gotquit(self, pieces):
 270                 nick = pieces[0].split('!')[0][1:]
 271                 if nick != self.nick:
 272                         for chan in self.parent.user(nick).chans:
 273                                 chan.userpart(self.parent.user(nick))
 274                         self.parent.user(nick).quit()
 275                         del self.parent.users[nick.lower()]
 276         def _gotnick(self, pieces):
 277                 oldnick = pieces[0].split('!')[0][1:]
 278                 newnick = pieces[2][1:]
 279                 if oldnick == self.nick:
 280                         self.nick = newnick
 281                 else:
 282                         if newnick.lower() != oldnick.lower():
 283                                 self.parent.users[newnick.lower()] = self.parent.users[oldnick.lower()]
 284                                 del self.parent.users[oldnick.lower()]
 285                         self.parent.users[newnick.lower()].nickchange(newnick)
 286         def _gotmode(self, pieces):
 287                 source = pieces[0].split('!')[0][1:]
 288                 chan = pieces[2]
 289                 if not chan.startswith("#"): return
 290                 chan = self.parent.channel(pieces[2])
 291                 mode = pieces[3]
 292                 args = pieces[4:]
 293
 294                 adding = True
 295                 for c in mode:
 296                         if c == '+':
 297                                 adding = True
 298                         elif c == '-':
 299                                 adding = False
 300                         elif c == 'o':
 301                                 if adding:
 302                                         chan.userop(self.parent.user(args.pop(0)))
 303                                 else:
 304                                         chan.userdeop(self.parent.user(args.pop(0)))
 305                         elif c == 'v':
 306                                 if adding:
 307                                         chan.uservoice(self.parent.user(args.pop(0)))
 308                                 else:
 309                                         chan.userdevoice(self.parent.user(args.pop(0)))
 310                         else:
 311                                 pass # don't care about other modes
 312
 313         def _cbexception(self, source, *args, chained=False, **kwargs):
 314                 if not chained: # skip hooks if we were caused by a hook
 315                         exc = sys.exception()
 316                         if self.parent.hasexceptionhook(exc):
 317                                 for callback in self.parent.getexceptionhook(exc):
 318                                         try:
 319                                                 callback(self, exc, source, *args, **kwargs)
 320                                         except Exception:
 321                                                 self._cbexception('exceptionhook', chained=True, module=callback.__module__, function=callback.__name__, underlying=(source, args, kwargs))
 322                 if self.parent.cfg.getboolean('debug', 'cbexc'):
 323                         self.conn.send("PRIVMSG %s :%09.3f \ 34\1f!!! CBEXC\1f\ 3 %s" % (self.parent.cfg.get('debug', 'owner'), time.time() % 100000, source))
 324                         traceback.print_exc(chain=not chained)
 325                         self.log('!', "CBEXC %s %r %r" % (source, args, kwargs))
 326
 327
 328         def parsemsg(self, user, target, msg):
 329                 if user.glevel <= -2: return # short circuit if user is IGNORED
 330                 chan = None
 331                 chanparam = None # was the channel specified as part of the command?
 332                 if len(msg) == 0:
 333                         return
 334
 335                 if target == self.nick and msg.startswith("\001"): #ctcp
 336                         msg = msg.strip("\001")
 337                         if msg:
 338                                 pieces = msg.split()
 339                                 if pieces[0] == "CLIENTINFO":
 340                                         self.msg(user, "\001CLIENTINFO VERSION PING\001")
 341                                 elif pieces[0] == "VERSION":
 342                                         self.msg(user, "\001VERSION Erebus v%d.%d - http://jfr.im/git/erebus.git\001" % (self.parent.APIVERSION, self.parent.RELEASE))
 343                                 elif pieces[0] == "PING":
 344                                         if len(pieces) > 1:
 345                                                 self.msg(user, "\001PING %s\001" % (' '.join(pieces[1:])))
 346                                         else:
 347                                                 self.msg(user, "\001PING\001")
 348                         return
 349
 350                 triggerused = msg.startswith(self.parent.trigger)
 351                 if triggerused: msg = msg[len(self.parent.trigger):]
 352                 pieces = msg.split()
 353
 354                 if len(pieces) == 0:
 355                         return
 356
 357                 if target != self.nick: # message was sent to a channel
 358                         try:
 359                                 if pieces[0][:-1].lower() == self.nick.lower() and (pieces[0][-1] == ":" or pieces[0][-1] == ","):
 360                                         pieces.pop(0) # command actually starts with next word
 361                                         if len(pieces) == 0: # is there still anything left?
 362                                                 return
 363                                         msg = ' '.join(pieces)
 364                                         triggerused = True
 365                         except IndexError:
 366                                 return # "message" is empty
 367
 368                 if len(pieces) > 1:
 369                         chanword = pieces[1]
 370                         if chanword.startswith('#'):
 371                                 chanparam = self.parent.channel(chanword)
 372
 373                 if target != self.nick: # message was sent to a channel
 374                         chan = self.parent.channel(target)
 375                         if not triggerused:
 376                                 if self.parent.haschanhook(target.lower()):
 377                                         for callback in self.parent.getchanhook(target.lower()):
 378                                                 try:
 379                                                         cbret = callback(self, user, chan, *pieces)
 380                                                         if isinstance(cbret, stringbase):
 381                                                                 self.reply(target, user, cbret)
 382                                                 except:
 383                                                         self.msg(user, "Command failed. Code: CBEXC%09.3f" % (time.time() % 100000))
 384                                                         self._cbexception("chanhook", user=user, target=target, msg=msg)
 385                                 return # not to bot, don't process!
 386
 387                 cmd = pieces[0].lower()
 388                 rancmd = False
 389                 if self.parent.hashook(cmd):
 390                         for callback in self.parent.gethook(cmd):
 391                                 if chanparam is not None and (callback.needchan or callback.wantchan):
 392                                         chan = chanparam
 393                                         pieces.pop(1)
 394                                 if chan is None and callback.needchan:
 395                                         rancmd = True
 396                                         self.msg(user, "You need to specify a channel for that command.")
 397                                 elif user.glevel >= callback.reqglevel and (not callback.needchan or chan.levelof(user.auth) >= callback.reqclevel):
 398                                         rancmd = True
 399                                         try:
 400                                                 cbret = callback(self, user, chan, target, *pieces[1:])
 401                                                 if isinstance(cbret, stringbase):
 402                                                         self.reply(target, user, cbret)
 403                                         except Exception:
 404                                                 self.msg(user, "Command failed. Code: CBEXC%09.3f" % (time.time() % 100000))
 405                                                 self._cbexception("hook", user=user, target=target, msg=msg)
 406                                         except SystemExit as e:
 407                                                 self.parent.mustquit = e
 408                                                 try:
 409                                                         curs = self.parent.query("UPDATE bots SET connected = 0")
 410                                                         curs.close()
 411                                                 except: pass
 412                                                 raise e
 413                 else:
 414                         rancmd = True
 415                         self.msg(user, "I don't know that command.")
 416                 if not rancmd:
 417                         self.msg(user, "You don't have enough access to run that command.")
 418
 419         def __debug_nomsg(self, target, msg):
 420                 if self.parent.cfg.getboolean('debug', 'nomsg'):
 421                         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))
 422                         self.log('!', "!!! NOMSG")
 423 #                       print "%09.3f %s [!] %s" % (time.time() % 100000, self.nick, "!!! NOMSG")
 424                         traceback.print_stack()
 425
 426
 427         def reply(self, chan, user, msg):
 428                 if chan is not None and (isinstance(chan, self.parent.Channel) or (isinstance(chan, stringbase) and chan[0] == "#")):
 429                         self.msg(chan, "%s: %s" % (user, msg))
 430                 else:
 431                         self.msg(user, msg)
 432
 433         """
 434                 Does the work for msg/slowmsg/fastmsg. Uses the append_callback to append to the correct queue.
 435
 436                 In the case of fastmsg, self.conn.exceeded may be True, however, in this case append_callback=self.conn.send, so it will still be sent immediately.
 437         """
 438         def _msg(self, target, msg, truncate, append_callback, msgtype):
 439                 if self.parent.cfg.getboolean('erebus', 'nofakelag'): append_callback = self.conn.send
 440
 441                 cmd = self._formatmsg(target, msg, msgtype)
 442                 # The max length is much shorter than conn.maxlen (510) because of the length the server adds on about the source (us).
 443                 # If you know your hostmask, you can of course figure the exact length, but it's very difficult to reliably know your hostmask.
 444                 maxlen = self.maxmsglen()
 445                 if len(cmd) > maxlen:
 446                         if not truncate:
 447                                 return False
 448                         else:
 449                                 cmd = cmd[:maxlen]
 450
 451                 if self.conn.exceeded or self.conn.bytessent+len(cmd) >= self.conn.recvq:
 452                         append_callback(cmd)
 453                 else:
 454                         self.conn.send(cmd)
 455
 456                 self.conn.exceeded = True
 457                 return True
 458
 459         def msg(self, target, msg, truncate=False, *, msgtype=None):
 460                 """msgtype must be a valid IRC command, i.e. NOTICE or PRIVMSG; or leave as None to use default"""
 461                 return self._msg(target, msg, truncate, self.msgqueue.append, msgtype)
 462
 463         def slowmsg(self, target, msg, truncate=False, *, msgtype=None):
 464                 return self._msg(target, msg, truncate, self.slowmsgqueue.append, msgtype)
 465
 466         def fastmsg(self, target, msg, truncate=False, *, msgtype=None):
 467                 return self._msg(target, msg, truncate, self.conn.send, msgtype)
 468
 469         def _formatmsg(self, target, msg, msgtype):
 470                 if target is None or msg is None:
 471                         return self.__debug_nomsg(target, msg)
 472
 473                 target = str(target)
 474
 475                 if msgtype is not None: command = "%s %s :%s" % (msgtype, target, msg)
 476                 elif target.startswith('#'): command = "PRIVMSG %s :%s" % (target, msg)
 477                 else: command = "NOTICE %s :%s" % (target, msg)
 478
 479                 return command
 480
 481         def _popmsg(self):
 482                 self._makemsgtimer()
 483                 self.conn.bytessent -= self.conn.recvq/3
 484                 if self.conn.bytessent < 0: self.conn.bytessent = 0
 485                 self.conn.exceeded = True
 486
 487                 cmd = None
 488                 try:
 489                         cmd = self.msgqueue.popleft()
 490                 except IndexError:
 491                         try:
 492                                 cmd = self.slowmsgqueue.popleft()
 493                         except IndexError:
 494                                 pass
 495
 496                 if cmd is not None:
 497                         if self.conn.bytessent+len(cmd) > self.conn.recvq: # If it's too long
 498                                 if len(cmd) > self.conn.recvq: # Is the command itself somehow over max length???
 499                                         self._msgtimer.start()
 500                                         raise ValueError('Somehow a command that was too long made it into the message queue. Uhoh!', cmd)
 501                                         # Discard the message.
 502                                 self.msgqueue.appendleft(cmd) # Phew, we've just sent too much recently. Put it (back) on the (primary) queue.
 503                         else:
 504                                 self.conn.send(cmd)
 505
 506                 self._msgtimer.start()
 507
 508         def _makemsgtimer(self):
 509                 self._msgtimer = MyTimer(3, self._popmsg)
 510
 511         def join(self, chan):
 512                 self.conn.send("JOIN %s" % (chan))
 513
 514         def part(self, chan):
 515                 self.conn.send("PART %s" % (chan))
 516
 517         def quit(self, reason="Shutdown"):
 518                 self.conn.send("QUIT :%s" % (reason))
 519
 520         def maxmsglen(self):
 521                 return (
 522                         self.maxlen
 523                         - 63 # max hostname len
 524                         - 11 # max ident len
 525                         - 3  # the symbols in :nick!user@host
 526                         - len(self.nick)
 527                 )
 528
 529         def __str__(self): return self.nick
 530         def __repr__(self): return "<Bot %r>" % (self.nick)
 531
 532 class BotConnection(object):
 533         def __init__(self, parent, bind, server, port):
 534                 self.parent = parent
 535                 self.buffer = bytearray()
 536                 self.socket = None
 537
 538                 self.bind = bind
 539                 self.server = server
 540                 self.port = int(port)
 541
 542                 self.state = 0 # 0=disconnected, 1=registering, 2=connected
 543
 544                 self.bytessent = 0
 545                 self.recvq = 510 # How much we can send per period
 546                 self.exceeded = False
 547                 self._nowrite = False
 548
 549         def connect(self):
 550                 if self.parent.parent.cfg.getboolean('erebus', 'tls'):
 551                         import ssl
 552                         undersocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 553                         context = ssl.create_default_context()
 554                         self.socket = context.wrap_socket(undersocket, server_hostname=self.server)
 555                 else:
 556                         self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 557                 self.socket.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1) # Does Python make SOL_TCP portable? Who knows, it's not documented, and it appears to come from the _socket C lib.
 558                 self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_LINGER, struct.pack('ii', 0, 0))
 559                 self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
 560                 self.socket.bind((self.bind, 0))
 561                 self._write_oidentd()
 562                 self.socket.connect((self.server, self.port))
 563                 return True
 564         def register(self):
 565                 if self.state == 0:
 566                         pss = self.parent.parent.cfg.get('erebus', 'pass')
 567                         if pss:
 568                                 self.send("PASS %s" % (pss))
 569                         self.send("NICK %s" % (self.parent.nick))
 570                         self.send("USER %s 0 * :%s" % (self.parent.user, self.parent.realname))
 571                         self.state = 1
 572                 return True
 573
 574         def registered(self, done=False):
 575                 if done:
 576                         self.state = 2
 577                         self._unwrite_oidentd()
 578                 return self.state == 2
 579
 580         def send(self, line):
 581                 if not self._nowrite:
 582                         if self.parent.parent.cfg.getboolean('debug', 'io'):
 583                                 self.parent.log('O', line)
 584                         self.bytessent += len(line)
 585                         try:
 586                                 self._write(line)
 587                         except socket.error as e:
 588                                 self._nowrite = True
 589                                 self.parent._goterror(repr(e))
 590                 else:
 591                         if self.parent.parent.cfg.getboolean('debug', 'io'):
 592                                 self.parent.log('X', line)
 593
 594         def _write(self, line):
 595                 self.socket.sendall(line.encode('utf-8', 'surrogateescape')+b"\r\n")
 596
 597         def _getsockerr(self):
 598                 try: # SO_ERROR might not exist on all platforms
 599                         return self.socket.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
 600                 except:
 601                         return None
 602
 603         def read(self):
 604                 recvd = self.socket.recv(8192)
 605                 if recvd == b"":
 606                         raise EOFError("socket.recv returned empty", self.parent.nick, self._getsockerr())
 607                 self.buffer += recvd
 608                 lines = []
 609
 610                 while b"\r\n" in self.buffer:
 611                         pieces = self.buffer.split(b"\r\n", 1)
 612                         lines.append(pieces[0].decode('utf-8', 'backslashreplace'))
 613                         self.buffer = pieces[1]
 614
 615                 return lines
 616
 617         def _format_oidentd(self):
 618                 ident = self.parent.user
 619                 fport = self.parent.port
 620                 from_ = self.bind
 621                 lport = self.socket.getsockname()[1]
 622                 if from_:
 623                         return 'fport %s from %s lport %s { reply "%s" }\n' % (fport, from_, lport, ident)
 624                 else:
 625                         return 'fport %s lport %s { reply "%s" }\n' % (fport, lport, ident)
 626         def _write_oidentd(self):
 627                 path = self.parent.parent.cfg.get('erebus', 'oidentd_path')
 628                 if path is not None:
 629                         with open(path, 'a') as fh:
 630                                 fcntl.lockf(fh, fcntl.LOCK_EX)
 631                                 fh.write(self._format_oidentd())
 632                                 fcntl.lockf(fh, fcntl.LOCK_UN)
 633         def _unwrite_oidentd(self):
 634                 path = self.parent.parent.cfg.get('erebus', 'oidentd_path')
 635                 if path is not None:
 636                         with open(path, 'r+') as fh:
 637                                 fcntl.lockf(fh, fcntl.LOCK_EX)
 638                                 data = fh.read()
 639                                 newdata = data.replace(self._format_oidentd(), '')
 640                                 fh.seek(0)
 641                                 fh.write(newdata)
 642                                 fh.truncate()
 643                                 fcntl.lockf(fh, fcntl.LOCK_UN)
 644
 645         def __str__(self): return self.parent.nick
 646         def __repr__(self): return "<BotConnection %r (%r)>" % (self.socket.fileno(), self.parent.nick)