### # Copyright (c) 2002-2004, Jeremiah Fincher # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are met: # # * Redistributions of source code must retain the above copyright notice, # this list of conditions, and the following disclaimer. # * Redistributions in binary form must reproduce the above copyright notice, # this list of conditions, and the following disclaimer in the # documentation and/or other materials provided with the distribution. # * Neither the name of the author of this software nor the name of # contributors to this software may be used to endorse or promote products # derived from this software without specific prior written consent. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. ### """ Contains simple socket drivers. Asyncore bugged (haha, pun!) me. """ from __future__ import division import time import select import socket import supybot.log as log import supybot.conf as conf import supybot.utils as utils import supybot.world as world import supybot.drivers as drivers import supybot.schedule as schedule from supybot.utils.iter import imap class SocketDriver(drivers.IrcDriver, drivers.ServersMixin): def __init__(self, irc): self.irc = irc self.__parent = super(SocketDriver, self) self.__parent.__init__(irc) self.conn = None self.servers = () self.eagains = 0 self.inbuffer = '' self.outbuffer = '' self.zombie = False self.scheduled = None self.connected = False self.resetDelay() # Only connect to non-SSL servers if self.networkGroup.get('ssl').value: drivers.log.error('The Socket driver can not connect to SSL ' 'servers. Try the Twisted driver instead.') else: self.connect() def getDelay(self): ret = self.currentDelay self.currentDelay = min(self.currentDelay * 2, conf.supybot.drivers.maxReconnectWait()) return ret def resetDelay(self): self.currentDelay = 10.0 def _getNextServer(self): oldServer = getattr(self, 'currentServer', None) server = self.__parent._getNextServer() if self.currentServer != oldServer: self.resetDelay() return server def _handleSocketError(self, e): # (11, 'Resource temporarily unavailable') raised if connect # hasn't finished yet. We'll keep track of how many we get. if e.args[0] != 11 and self.eagains > 120: drivers.log.disconnect(self.currentServer, e) self.scheduleReconnect() else: log.debug('Got EAGAIN, current count: %s.', self.eagains) self.eagains += 1 def _sendIfMsgs(self): if not self.zombie: msgs = [self.irc.takeMsg()] while msgs[-1] is not None: msgs.append(self.irc.takeMsg()) del msgs[-1] self.outbuffer += ''.join(imap(str, msgs)) if self.outbuffer: try: sent = self.conn.send(self.outbuffer) self.outbuffer = self.outbuffer[sent:] self.eagains = 0 except socket.error, e: self._handleSocketError(e) if self.zombie and not self.outbuffer: self._reallyDie() def run(self): if not self.connected: # We sleep here because otherwise, if we're the only driver, we'll # spin at 100% CPU while we're disconnected. time.sleep(conf.supybot.drivers.poll()) return self._sendIfMsgs() try: self.inbuffer += self.conn.recv(1024) self.eagains = 0 # If we successfully recv'ed, we can reset this. lines = self.inbuffer.split('\n') self.inbuffer = lines.pop() for line in lines: msg = drivers.parseMsg(line) if msg is not None: self.irc.feedMsg(msg) except socket.timeout: pass except socket.error, e: self._handleSocketError(e) return if not self.irc.zombie: self._sendIfMsgs() def connect(self, **kwargs): self.reconnect(reset=False, **kwargs) def reconnect(self, reset=True): self.scheduled = None if self.connected: drivers.log.reconnect(self.irc.network) self.conn.close() self.connected = False if reset: drivers.log.debug('Resetting %s.', self.irc) self.irc.reset() else: drivers.log.debug('Not resetting %s.', self.irc) server = self._getNextServer() drivers.log.connect(self.currentServer) try: self.conn = utils.net.getSocket(server[0]) vhost = conf.supybot.protocols.irc.vhost() self.conn.bind((vhost, 0)) except socket.error, e: drivers.log.connectError(self.currentServer, e) self.scheduleReconnect() return # We allow more time for the connect here, since it might take longer. # At least 10 seconds. self.conn.settimeout(max(10, conf.supybot.drivers.poll()*10)) try: self.conn.connect(server) self.conn.settimeout(conf.supybot.drivers.poll()) self.connected = True self.resetDelay() except socket.error, e: if e.args[0] == 115: now = time.time() when = now + 60 whenS = log.timestamp(when) drivers.log.debug('Connection in progress, scheduling ' 'connectedness check for %s', whenS) schedule.addEvent(self._checkAndWriteOrReconnect, when) else: drivers.log.connectError(self.currentServer, e) self.scheduleReconnect() return def _checkAndWriteOrReconnect(self): drivers.log.debug('Checking whether we are connected.') (_, w, _) = select.select([], [self.conn], [], 0) if w: drivers.log.debug('Socket is writable, it might be connected.') self.connected = True self.resetDelay() else: drivers.log.connectError(self.currentServer, 'Timed out') self.reconnect() def scheduleReconnect(self): when = time.time() + self.getDelay() if not world.dying: drivers.log.reconnect(self.irc.network, when) if self.scheduled: drivers.log.error('Scheduling a second reconnect when one is ' 'already scheduled. This is a bug; please ' 'report it, with an explanation of what caused ' 'this to happen.') schedule.removeEvent(self.scheduled) self.scheduled = schedule.addEvent(self.reconnect, when) def die(self): self.zombie = True if self.scheduled: schedule.removeEvent(self.scheduled) drivers.log.die(self.irc) def _reallyDie(self): if self.conn is not None: self.conn.close() drivers.IrcDriver.die(self) # self.irc.die() Kill off the ircs yourself, jerk! def name(self): return '%s(%s)' % (self.__class__.__name__, self.irc) Driver = SocketDriver # vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79: