-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
*
- * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
- * E-mail:
- * <brain@chatspike.net>
- * <Craig@chatspike.net>
- *
- * Written by Craig Edwards, Craig McLure, and others.
- * This program is free but copyrighted software; see
- * the file COPYING for details.
+ * Copyright (C) 2012 Shawn Smith <ShawnSmith0828@gmail.com>
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2004, 2006 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
*
- * ---------------------------------------------------
+ * This file is part of InspIRCd. InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-using namespace std;
-#include <stdio.h>
-#include "users.h"
-#include "channels.h"
-#include "modules.h"
-#include "helperfuncs.h"
+#include "inspircd.h"
-/* $ModDesc: Provides channel mode +L (limit redirection) */
-
-extern chan_hash chanlist;
+/* $ModDesc: Provides channel mode +L (limit redirection) and usermode +L (no forced redirection) */
+/** Handle channel mode +L
+ */
class Redirect : public ModeHandler
{
- Server* Srv;
public:
- Redirect(Server* s) : ModeHandler('L', 1, 0, false, MODETYPE_CHANNEL, false), Srv(s) { }
+ Redirect(Module* Creator) : ModeHandler(Creator, "redirect", 'L', PARAM_SETONLY, MODETYPE_CHANNEL) { }
- ModePair ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter)
- {
- if (channel->IsModeSet('L'))
- return std::make_pair(true, channel->GetModeParameter('L'));
- else
- return std::make_pair(false, parameter);
- }
-
- bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
- {
- /* When TS is equal, the alphabetically later one wins */
- return (their_param < our_param);
- }
-
- ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding)
+ ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
{
if (adding)
{
- chanrec* c = NULL;
-
- if (!IsValidChannelName(parameter.c_str()))
+ if (IS_LOCAL(source))
{
- WriteServ(source->fd,"403 %s %s :Invalid channel name",source->nick, parameter.c_str());
- parameter = "";
- return MODEACTION_DENY;
+ if (!ServerInstance->IsChannel(parameter.c_str(), ServerInstance->Config->Limits.ChanMax))
+ {
+ source->WriteNumeric(403, "%s %s :Invalid channel name", source->nick.c_str(), parameter.c_str());
+ parameter.clear();
+ return MODEACTION_DENY;
+ }
}
- c = Srv->FindChannel(parameter);
- if (c)
+ if (IS_LOCAL(source) && !IS_OPER(source))
{
- /* Fix by brain: Dont let a channel be linked to *itself* either */
- if (IS_LOCAL(source))
+ Channel* c = ServerInstance->FindChan(parameter);
+ if (!c)
{
- if ((c == channel) || (c->IsModeSet('L')))
- {
- WriteServ(source->fd,"690 %s :Circular or chained +L to %s not allowed (Channel already has +L). Pack of wild dogs has been unleashed.",source->nick,parameter.c_str());
- parameter = "";
- return MODEACTION_DENY;
- }
- else
- {
- for (chan_hash::const_iterator i = chanlist.begin(); i != chanlist.end(); i++)
- {
- if ((i->second != channel) && (i->second->IsModeSet('L')) && (irc::string(i->second->GetModeParameter('L').c_str()) == irc::string(channel->name)))
- {
- WriteServ(source->fd,"690 %s :Circular or chained +L to %s not allowed (Already forwarded here from %s). Angry monkeys dispatched.",source->nick,parameter.c_str(),i->second->name);
- return MODEACTION_DENY;
- }
- }
- }
+ source->WriteNumeric(690, "%s :Target channel %s must exist to be set as a redirect.",source->nick.c_str(),parameter.c_str());
+ parameter.clear();
+ return MODEACTION_DENY;
+ }
+ else if (c->GetPrefixValue(source) < OP_VALUE)
+ {
+ source->WriteNumeric(690, "%s :You must be opped on %s to set it as a redirect.",source->nick.c_str(),parameter.c_str());
+ parameter.clear();
+ return MODEACTION_DENY;
}
}
- channel->SetMode('L', true);
- channel->SetModeParam('L', parameter.c_str(), true);
+ if (channel->GetModeParameter('L') == parameter)
+ return MODEACTION_DENY;
+ /*
+ * We used to do some checking for circular +L here, but there is no real need for this any more especially as we
+ * now catch +L looping in PreJoin. Remove it, since O(n) logic makes me sad, and we catch it anyway. :) -- w00t
+ */
+ channel->SetModeParam('L', parameter);
return MODEACTION_ALLOW;
}
else
{
if (channel->IsModeSet('L'))
{
- channel->SetMode('L', false);
+ channel->SetModeParam('L', "");
return MODEACTION_ALLOW;
}
}
return MODEACTION_DENY;
-
+
}
};
+/** Handles usermode +L to stop forced redirection and print an error.
+*/
+class AntiRedirect : public SimpleUserModeHandler
+{
+ public:
+ AntiRedirect(Module* Creator) : SimpleUserModeHandler(Creator, "antiredirect", 'L') {}
+};
+
class ModuleRedirect : public Module
{
- Server *Srv;
- Redirect* re;
-
+
+ Redirect re;
+ AntiRedirect re_u;
+ bool UseUsermode;
+
public:
-
- ModuleRedirect(Server* Me)
- : Module::Module(Me)
- {
- Srv = Me;
- re = new Redirect(Me);
- Srv->AddMode(re, 'L');
- }
-
- void Implements(char* List)
+
+ ModuleRedirect()
+ : re(this), re_u(this)
{
- List[I_On005Numeric] = List[I_OnUserPreJoin] = 1;
}
- virtual void On005Numeric(std::string &output)
+ void init()
{
- InsertMode(output, "L", 3);
+ /* Setting this here so it isn't changable by rehasing the config later. */
+ UseUsermode = ServerInstance->Config->ConfValue("redirect")->getBool("antiredirect");
+
+ /* Channel mode */
+ ServerInstance->Modules->AddService(re);
+
+ /* Check to see if the usermode is enabled in the config */
+ if (UseUsermode)
+ {
+ /* Log noting that this breaks compatability. */
+ ServerInstance->Logs->Log("m_redirect", DEFAULT, "REDIRECT: Enabled usermode +L. This breaks linking with servers that do not have this enabled. This is disabled by default in the 2.0 branch but will be enabled in the next version.");
+
+ /* Try to add the usermode */
+ ServerInstance->Modules->AddService(re_u);
+ }
+
+ Implementation eventlist[] = { I_OnUserPreJoin };
+ ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
}
-
- virtual int OnUserPreJoin(userrec* user, chanrec* chan, const char* cname)
+
+ virtual ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
{
if (chan)
{
- if (chan->IsModeSet('L'))
+ if (chan->IsModeSet('L') && chan->IsModeSet('l'))
{
- if (Srv->CountUsers(chan) >= chan->limit)
+ if (chan->GetUserCounter() >= ConvToInt(chan->GetModeParameter('l')))
{
std::string channel = chan->GetModeParameter('L');
- WriteServ(user->fd,"470 %s :%s has become full, so you are automatically being transferred to the linked channel %s",user->nick,cname,channel.c_str());
- chanrec::JoinUser(user, channel.c_str(), false);
- return 1;
+
+ /* sometimes broken ulines can make circular or chained +L, avoid this */
+ Channel* destchan = NULL;
+ destchan = ServerInstance->FindChan(channel);
+ if (destchan && destchan->IsModeSet('L'))
+ {
+ user->WriteNumeric(470, "%s %s * :You may not join this channel. A redirect is set, but you may not be redirected as it is a circular loop.", user->nick.c_str(), cname);
+ return MOD_RES_DENY;
+ }
+ /* We check the bool value here to make sure we have it enabled, if we don't then
+ usermode +L might be assigned to something else. */
+ if (UseUsermode && user->IsModeSet('L'))
+ {
+ user->WriteNumeric(470, "%s %s %s :Force redirection stopped.",
+ user->nick.c_str(), cname, channel.c_str());
+ return MOD_RES_DENY;
+ }
+ else
+ {
+ user->WriteNumeric(470, "%s %s %s :You may not join this channel, so you are automatically being transferred to the redirect channel.", user->nick.c_str(), cname, channel.c_str());
+ Channel::JoinUser(user, channel.c_str(), false, "", false, ServerInstance->Time());
+ return MOD_RES_DENY;
+ }
}
}
}
- return 0;
+ return MOD_RES_PASSTHRU;
}
virtual ~ModuleRedirect()
{
- DELETE(re);
- }
-
- virtual Version GetVersion()
- {
- return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
}
-};
-
-class ModuleRedirectFactory : public ModuleFactory
-{
- public:
- ModuleRedirectFactory()
- {
- }
-
- ~ModuleRedirectFactory()
- {
- }
-
- virtual Module * CreateModule(Server* Me)
+ virtual Version GetVersion()
{
- return new ModuleRedirect(Me);
+ return Version("Provides channel mode +L (limit redirection) and user mode +L (no forced redirection)", VF_VENDOR);
}
-
};
-
-extern "C" void * init_module( void )
-{
- return new ModuleRedirectFactory;
-}
-
+MODULE_INIT(ModuleRedirect)