2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
6 * Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
7 * Copyright (C) 2006-2007 Craig Edwards <craigedwards@brainbox.cc>
8 * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
10 * This file is part of InspIRCd. InspIRCd is free software: you can
11 * redistribute it and/or modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation, version 2.
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
16 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
26 /* $ModDesc: Provides channel mode +j (join flood protection) */
28 /** Holds settings and state associated with channel mode +j
30 class joinfloodsettings
39 joinfloodsettings(unsigned int b, unsigned int c)
40 : secs(b), joins(c), unlocktime(0), counter(0)
42 reset = ServerInstance->Time() + secs;
47 if (ServerInstance->Time() > reset)
50 reset = ServerInstance->Time() + secs;
58 return (counter >= this->joins);
68 if (ServerInstance->Time() > unlocktime)
71 return (unlocktime != 0);
76 unlocktime = ServerInstance->Time() + 60;
79 bool operator==(const joinfloodsettings& other) const
81 return ((this->secs == other.secs) && (this->joins == other.joins));
85 /** Handles channel mode +j
87 class JoinFlood : public ModeHandler
90 SimpleExtItem<joinfloodsettings> ext;
91 JoinFlood(Module* Creator) : ModeHandler(Creator, "joinflood", 'j', PARAM_SETONLY, MODETYPE_CHANNEL),
92 ext("joinflood", Creator) { }
94 ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
98 std::string::size_type colon = parameter.find(':');
99 if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos))
101 source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str());
102 return MODEACTION_DENY;
105 /* Set up the flood parameters for this channel */
106 unsigned int njoins = ConvToInt(parameter.substr(0, colon));
107 unsigned int nsecs = ConvToInt(parameter.substr(colon+1));
108 if ((njoins<1) || (nsecs<1))
110 source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str());
111 return MODEACTION_DENY;
114 joinfloodsettings jfs(nsecs, njoins);
115 joinfloodsettings* f = ext.get(channel);
116 if ((f) && (*f == jfs))
118 return MODEACTION_DENY;
120 ext.set(channel, jfs);
121 parameter = ConvToStr(njoins) + ":" + ConvToStr(nsecs);
122 channel->SetModeParam(this, parameter);
123 return MODEACTION_ALLOW;
127 if (!channel->IsModeSet(this))
128 return MODEACTION_DENY;
130 joinfloodsettings* f = ext.get(channel);
134 channel->SetModeParam(this, "");
135 return MODEACTION_ALLOW;
138 return MODEACTION_DENY;
142 class ModuleJoinFlood : public Module
152 void init() CXX11_OVERRIDE
154 ServerInstance->Modules->AddService(jf);
155 ServerInstance->Modules->AddService(jf.ext);
156 Implementation eventlist[] = { I_OnUserPreJoin, I_OnUserJoin };
157 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
160 ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE
164 joinfloodsettings *f = jf.ext.get(chan);
165 if (f && f->islocked())
167 user->WriteNumeric(609, "%s %s :This channel is temporarily unavailable (+j). Please try again later.",user->nick.c_str(),chan->name.c_str());
171 return MOD_RES_PASSTHRU;
174 void OnUserJoin(Membership* memb, bool sync, bool created, CUList& excepts) CXX11_OVERRIDE
176 /* We arent interested in JOIN events caused by a network burst */
180 joinfloodsettings *f = jf.ext.get(memb->chan);
182 /* But all others are OK */
190 memb->chan->WriteChannelWithServ((char*)ServerInstance->Config->ServerName.c_str(), "NOTICE %s :This channel has been closed to new users for 60 seconds because there have been more than %d joins in %d seconds.", memb->chan->name.c_str(), f->joins, f->secs);
195 Version GetVersion() CXX11_OVERRIDE
197 return Version("Provides channel mode +j (join flood protection)", VF_VENDOR);
201 MODULE_INIT(ModuleJoinFlood)