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/>.
28 /** Holds flood settings and state for mode +f
37 insp::flat_map<User*, unsigned int> counters;
39 floodsettings(bool a, int b, int c) : ban(a), secs(b), lines(c)
41 reset = ServerInstance->Time() + secs;
44 bool addmessage(User* who)
46 if (ServerInstance->Time() > reset)
49 reset = ServerInstance->Time() + secs;
52 return (++counters[who] >= this->lines);
61 /** Handles channel mode +f
63 class MsgFlood : public ParamMode<MsgFlood, SimpleExtItem<floodsettings> >
66 MsgFlood(Module* Creator)
67 : ParamMode<MsgFlood, SimpleExtItem<floodsettings> >(Creator, "flood", 'f')
71 ModeAction OnSet(User* source, Channel* channel, std::string& parameter)
73 std::string::size_type colon = parameter.find(':');
74 if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos))
76 source->WriteNumeric(608, channel->name, "Invalid flood parameter");
77 return MODEACTION_DENY;
80 /* Set up the flood parameters for this channel */
81 bool ban = (parameter[0] == '*');
82 unsigned int nlines = ConvToInt(parameter.substr(ban ? 1 : 0, ban ? colon-1 : colon));
83 unsigned int nsecs = ConvToInt(parameter.substr(colon+1));
85 if ((nlines<2) || (nsecs<1))
87 source->WriteNumeric(608, channel->name, "Invalid flood parameter");
88 return MODEACTION_DENY;
91 ext.set(channel, new floodsettings(ban, nsecs, nlines));
92 return MODEACTION_ALLOW;
95 void SerializeParam(Channel* chan, const floodsettings* fs, std::string& out)
99 out.append(ConvToStr(fs->lines)).push_back(':');
100 out.append(ConvToStr(fs->secs));
104 class ModuleMsgFlood : public Module
115 ModResult OnUserPreMessage(User* user, void* voiddest, int target_type, std::string& text, char status, CUList& exempt_list, MessageType msgtype) CXX11_OVERRIDE
117 if (target_type != TYPE_CHANNEL)
118 return MOD_RES_PASSTHRU;
120 Channel* dest = static_cast<Channel*>(voiddest);
121 if ((!IS_LOCAL(user)) || !dest->IsModeSet(mf))
122 return MOD_RES_PASSTHRU;
124 if (ServerInstance->OnCheckExemption(user,dest,"flood") == MOD_RES_ALLOW)
125 return MOD_RES_PASSTHRU;
127 floodsettings *f = mf.ext.get(dest);
130 if (f->addmessage(user))
132 /* Youre outttta here! */
136 Modes::ChangeList changelist;
137 changelist.push_add(ServerInstance->Modes->FindMode('b', MODETYPE_CHANNEL), "*!*@" + user->dhost);
138 ServerInstance->Modes->Process(ServerInstance->FakeClient, dest, NULL, changelist);
141 const std::string kickMessage = "Channel flood triggered (limit is " + ConvToStr(f->lines) +
142 " in " + ConvToStr(f->secs) + " secs)";
144 dest->KickUser(ServerInstance->FakeClient, user, kickMessage);
150 return MOD_RES_PASSTHRU;
155 // we want to be after all modules that might deny the message (e.g. m_muteban, m_noctcp, m_blockcolor, etc.)
156 ServerInstance->Modules->SetPriority(this, I_OnUserPreMessage, PRIORITY_LAST);
159 Version GetVersion() CXX11_OVERRIDE
161 return Version("Provides channel mode +f (message flood protection)", VF_VENDOR);
165 MODULE_INIT(ModuleMsgFlood)