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/exemption.h"
29 /** Holds flood settings and state for mode +f
38 insp::flat_map<User*, unsigned int> counters;
40 floodsettings(bool a, unsigned int b, unsigned int c)
45 reset = ServerInstance->Time() + secs;
48 bool addmessage(User* who)
50 if (ServerInstance->Time() > reset)
53 reset = ServerInstance->Time() + secs;
56 return (++counters[who] >= this->lines);
65 /** Handles channel mode +f
67 class MsgFlood : public ParamMode<MsgFlood, SimpleExtItem<floodsettings> >
70 MsgFlood(Module* Creator)
71 : ParamMode<MsgFlood, SimpleExtItem<floodsettings> >(Creator, "flood", 'f')
75 ModeAction OnSet(User* source, Channel* channel, std::string& parameter) CXX11_OVERRIDE
77 std::string::size_type colon = parameter.find(':');
78 if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos))
80 source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
81 return MODEACTION_DENY;
84 /* Set up the flood parameters for this channel */
85 bool ban = (parameter[0] == '*');
86 unsigned int nlines = ConvToNum<unsigned int>(parameter.substr(ban ? 1 : 0, ban ? colon-1 : colon));
87 unsigned int nsecs = ConvToNum<unsigned int>(parameter.substr(colon+1));
89 if ((nlines<2) || (nsecs<1))
91 source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
92 return MODEACTION_DENY;
95 ext.set(channel, new floodsettings(ban, nsecs, nlines));
96 return MODEACTION_ALLOW;
99 void SerializeParam(Channel* chan, const floodsettings* fs, std::string& out)
103 out.append(ConvToStr(fs->lines)).push_back(':');
104 out.append(ConvToStr(fs->secs));
108 class ModuleMsgFlood : public Module
110 CheckExemption::EventProvider exemptionprov;
116 : exemptionprov(this)
121 ModResult OnUserPreMessage(User* user, const MessageTarget& target, MessageDetails& details) CXX11_OVERRIDE
123 if (target.type != MessageTarget::TYPE_CHANNEL)
124 return MOD_RES_PASSTHRU;
126 Channel* dest = target.Get<Channel>();
127 if ((!IS_LOCAL(user)) || !dest->IsModeSet(mf))
128 return MOD_RES_PASSTHRU;
130 ModResult res = CheckExemption::Call(exemptionprov, user, dest, "flood");
131 if (res == MOD_RES_ALLOW)
132 return MOD_RES_PASSTHRU;
134 floodsettings *f = mf.ext.get(dest);
137 if (f->addmessage(user))
139 /* Youre outttta here! */
143 Modes::ChangeList changelist;
144 changelist.push_add(ServerInstance->Modes->FindMode('b', MODETYPE_CHANNEL), "*!*@" + user->GetDisplayedHost());
145 ServerInstance->Modes->Process(ServerInstance->FakeClient, dest, NULL, changelist);
148 const std::string kickMessage = "Channel flood triggered (trigger is " + ConvToStr(f->lines) +
149 " lines in " + ConvToStr(f->secs) + " secs)";
151 dest->KickUser(ServerInstance->FakeClient, user, kickMessage);
157 return MOD_RES_PASSTHRU;
160 void Prioritize() CXX11_OVERRIDE
162 // we want to be after all modules that might deny the message (e.g. m_muteban, m_noctcp, m_blockcolor, etc.)
163 ServerInstance->Modules->SetPriority(this, I_OnUserPreMessage, PRIORITY_LAST);
166 Version GetVersion() CXX11_OVERRIDE
168 return Version("Provides channel mode +f (message flood protection)", VF_VENDOR);
172 MODULE_INIT(ModuleMsgFlood)