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.c_str(), ServerInstance->Config->Limits.ChanMax))
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) && !IS_OPER(source))
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 channel->SetModeParam('L', parameter);
74 return MODEACTION_ALLOW;
78 if (channel->IsModeSet('L'))
80 channel->SetModeParam('L', "");
81 return MODEACTION_ALLOW;
85 return MODEACTION_DENY;
90 /** Handles usermode +L to stop forced redirection and print an error.
92 class AntiRedirect : public SimpleUserModeHandler
95 AntiRedirect(Module* Creator) : SimpleUserModeHandler(Creator, "antiredirect", 'L') {}
98 class ModuleRedirect : public Module
108 : re(this), re_u(this)
114 /* Setting this here so it isn't changable by rehasing the config later. */
115 UseUsermode = ServerInstance->Config->ConfValue("redirect")->getBool("antiredirect");
118 ServerInstance->Modules->AddService(re);
120 /* Check to see if the usermode is enabled in the config */
123 /* Log noting that this breaks compatability. */
124 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.");
126 /* Try to add the usermode */
127 ServerInstance->Modules->AddService(re_u);
130 Implementation eventlist[] = { I_OnUserPreJoin };
131 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
134 ModResult OnUserPreJoin(User* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven)
138 if (chan->IsModeSet('L') && chan->IsModeSet('l'))
140 if (chan->GetUserCounter() >= ConvToInt(chan->GetModeParameter('l')))
142 std::string channel = chan->GetModeParameter('L');
144 /* sometimes broken ulines can make circular or chained +L, avoid this */
145 Channel* destchan = NULL;
146 destchan = ServerInstance->FindChan(channel);
147 if (destchan && destchan->IsModeSet('L'))
149 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());
152 /* We check the bool value here to make sure we have it enabled, if we don't then
153 usermode +L might be assigned to something else. */
154 if (UseUsermode && user->IsModeSet('L'))
156 user->WriteNumeric(470, "%s %s %s :Force redirection stopped.", user->nick.c_str(), cname.c_str(), channel.c_str());
161 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());
162 Channel::JoinUser(user, channel, false, "", false, ServerInstance->Time());
168 return MOD_RES_PASSTHRU;
171 virtual ~ModuleRedirect()
175 virtual Version GetVersion()
177 return Version("Provides channel mode +L (limit redirection) and user mode +L (no forced redirection)", VF_VENDOR);
181 MODULE_INIT(ModuleRedirect)