2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
6 * Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
7 * Copyright (C) 2007 John Brooks <john.brooks@dereferenced.net>
8 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
9 * Copyright (C) 2006 Craig Edwards <craigedwards@brainbox.cc>
10 * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
12 * This file is part of InspIRCd. InspIRCd is free software: you can
13 * redistribute it and/or modify it under the terms of the GNU General Public
14 * License as published by the Free Software Foundation, version 2.
16 * This program is distributed in the hope that it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
18 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
27 #include "modules/ctctags.h"
28 #include "modules/exemption.h"
30 /** Holds flood settings and state for mode +f
39 insp::flat_map<User*, double> counters;
41 floodsettings(bool a, unsigned int b, unsigned int c)
46 reset = ServerInstance->Time() + secs;
49 bool addmessage(User* who, double weight)
51 if (ServerInstance->Time() > reset)
54 reset = ServerInstance->Time() + secs;
57 counters[who] += weight;
58 return (counters[who] >= this->lines);
67 /** Handles channel mode +f
69 class MsgFlood : public ParamMode<MsgFlood, SimpleExtItem<floodsettings> >
72 MsgFlood(Module* Creator)
73 : ParamMode<MsgFlood, SimpleExtItem<floodsettings> >(Creator, "flood", 'f')
77 ModeAction OnSet(User* source, Channel* channel, std::string& parameter) CXX11_OVERRIDE
79 std::string::size_type colon = parameter.find(':');
80 if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos))
82 source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
83 return MODEACTION_DENY;
86 /* Set up the flood parameters for this channel */
87 bool ban = (parameter[0] == '*');
88 unsigned int nlines = ConvToNum<unsigned int>(parameter.substr(ban ? 1 : 0, ban ? colon-1 : colon));
89 unsigned int nsecs = ConvToNum<unsigned int>(parameter.substr(colon+1));
91 if ((nlines<2) || (nsecs<1))
93 source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
94 return MODEACTION_DENY;
97 ext.set(channel, new floodsettings(ban, nsecs, nlines));
98 return MODEACTION_ALLOW;
101 void SerializeParam(Channel* chan, const floodsettings* fs, std::string& out)
105 out.append(ConvToStr(fs->lines)).push_back(':');
106 out.append(ConvToStr(fs->secs));
112 , public CTCTags::EventListener
115 CheckExemption::EventProvider exemptionprov;
123 : CTCTags::EventListener(this)
124 , exemptionprov(this)
129 void ReadConfig(ConfigStatus&) CXX11_OVERRIDE
131 ConfigTag* tag = ServerInstance->Config->ConfValue("messageflood");
132 notice = tag->getFloat("notice", 1.0);
133 privmsg = tag->getFloat("privmsg", 1.0);
134 tagmsg = tag->getFloat("tagmsg", 0.2);
137 ModResult HandleMessage(User* user, const MessageTarget& target, double weight)
139 if (target.type != MessageTarget::TYPE_CHANNEL)
140 return MOD_RES_PASSTHRU;
142 Channel* dest = target.Get<Channel>();
143 if ((!IS_LOCAL(user)) || !dest->IsModeSet(mf))
144 return MOD_RES_PASSTHRU;
146 ModResult res = CheckExemption::Call(exemptionprov, user, dest, "flood");
147 if (res == MOD_RES_ALLOW)
148 return MOD_RES_PASSTHRU;
150 floodsettings *f = mf.ext.get(dest);
153 if (f->addmessage(user, weight))
155 /* Youre outttta here! */
159 Modes::ChangeList changelist;
160 changelist.push_add(ServerInstance->Modes->FindMode('b', MODETYPE_CHANNEL), "*!*@" + user->GetDisplayedHost());
161 ServerInstance->Modes->Process(ServerInstance->FakeClient, dest, NULL, changelist);
164 const std::string kickMessage = "Channel flood triggered (trigger is " + ConvToStr(f->lines) +
165 " lines in " + ConvToStr(f->secs) + " secs)";
167 dest->KickUser(ServerInstance->FakeClient, user, kickMessage);
173 return MOD_RES_PASSTHRU;
176 ModResult OnUserPreMessage(User* user, const MessageTarget& target, MessageDetails& details) CXX11_OVERRIDE
178 return HandleMessage(user, target, (details.type == MSG_PRIVMSG ? privmsg : notice));
181 ModResult OnUserPreTagMessage(User* user, const MessageTarget& target, CTCTags::TagMessageDetails& details) CXX11_OVERRIDE
183 return HandleMessage(user, target, tagmsg);
186 void Prioritize() CXX11_OVERRIDE
188 // we want to be after all modules that might deny the message (e.g. m_muteban, m_noctcp, m_blockcolor, etc.)
189 ServerInstance->Modules->SetPriority(this, I_OnUserPreMessage, PRIORITY_LAST);
192 Version GetVersion() CXX11_OVERRIDE
194 return Version("Provides channel mode +f, message flood protection", VF_VENDOR);
198 MODULE_INIT(ModuleMsgFlood)