2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2012 Shawn Smith <ShawnSmith0828@gmail.com>
5 * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
6 * Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
7 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
8 * Copyright (C) 2004, 2006 Craig Edwards <craigedwards@brainbox.cc>
9 * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
11 * This file is part of InspIRCd. InspIRCd is free software: you can
12 * redistribute it and/or modify it under the terms of the GNU General Public
13 * License as published by the Free Software Foundation, version 2.
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
20 * You should have received a copy of the GNU General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
27 /* $ModDesc: Provides channel mode +L (limit redirection) and usermode +L (no forced redirection) */
29 /** Handle channel mode +L
31 class Redirect : public ModeHandler
34 Redirect(Module* Creator) : ModeHandler(Creator, "redirect", 'L', PARAM_SETONLY, MODETYPE_CHANNEL) { }
36 ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
42 if (!ServerInstance->IsChannel(parameter))
44 source->WriteNumeric(403, "%s %s :Invalid channel name", source->nick.c_str(), parameter.c_str());
46 return MODEACTION_DENY;
50 if (IS_LOCAL(source) && !source->IsOper())
52 Channel* c = ServerInstance->FindChan(parameter);
55 source->WriteNumeric(690, "%s :Target channel %s must exist to be set as a redirect.",source->nick.c_str(),parameter.c_str());
57 return MODEACTION_DENY;
59 else if (c->GetPrefixValue(source) < OP_VALUE)
61 source->WriteNumeric(690, "%s :You must be opped on %s to set it as a redirect.",source->nick.c_str(),parameter.c_str());
63 return MODEACTION_DENY;
67 if (channel->GetModeParameter('L') == parameter)
68 return MODEACTION_DENY;
70 * We used to do some checking for circular +L here, but there is no real need for this any more especially as we
71 * now catch +L looping in PreJoin. Remove it, since O(n) logic makes me sad, and we catch it anyway. :) -- w00t
73 return MODEACTION_ALLOW;
77 if (channel->IsModeSet('L'))
79 return MODEACTION_ALLOW;
83 return MODEACTION_DENY;
88 /** Handles usermode +L to stop forced redirection and print an error.
90 class AntiRedirect : public SimpleUserModeHandler
93 AntiRedirect(Module* Creator) : SimpleUserModeHandler(Creator, "antiredirect", 'L') {}
96 class ModuleRedirect : public Module
106 : re(this), re_u(this)
110 void init() CXX11_OVERRIDE
112 /* Setting this here so it isn't changable by rehasing the config later. */
113 UseUsermode = ServerInstance->Config->ConfValue("redirect")->getBool("antiredirect");
116 ServerInstance->Modules->AddService(re);
118 /* Check to see if the usermode is enabled in the config */
121 /* Log noting that this breaks compatability. */
122 ServerInstance->Logs->Log("m_redirect", LOG_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.");
124 /* Try to add the usermode */
125 ServerInstance->Modules->AddService(re_u);
128 Implementation eventlist[] = { I_OnUserPreJoin };
129 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
132 ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE
136 if (chan->IsModeSet('L') && chan->IsModeSet('l'))
138 if (chan->GetUserCounter() >= ConvToInt(chan->GetModeParameter('l')))
140 std::string channel = chan->GetModeParameter('L');
142 /* sometimes broken ulines can make circular or chained +L, avoid this */
143 Channel* destchan = ServerInstance->FindChan(channel);
144 if (destchan && destchan->IsModeSet('L'))
146 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.c_str());
149 /* We check the bool value here to make sure we have it enabled, if we don't then
150 usermode +L might be assigned to something else. */
151 if (UseUsermode && user->IsModeSet('L'))
153 user->WriteNumeric(470, "%s %s %s :Force redirection stopped.", user->nick.c_str(), cname.c_str(), channel.c_str());
158 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.c_str(), channel.c_str());
159 Channel::JoinUser(user, channel);
165 return MOD_RES_PASSTHRU;
168 Version GetVersion() CXX11_OVERRIDE
170 return Version("Provides channel mode +L (limit redirection) and user mode +L (no forced redirection)", VF_VENDOR);
174 MODULE_INIT(ModuleRedirect)