1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2009 InspIRCd Development Team
6 * See: http://wiki.inspircd.org/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
16 /* $ModDesc: Provides channel mode +f (message flood protection) */
18 /** Holds flood settings and state for mode +f
20 class floodsettings : public classbase
23 InspIRCd *ServerInstance;
29 std::map<User*,int> counters;
31 floodsettings(InspIRCd *Instance, bool a, int b, int c) : ServerInstance(Instance), ban(a), secs(b), lines(c)
33 reset = ServerInstance->Time() + secs;
36 void addmessage(User* who)
38 std::map<User*,int>::iterator iter = counters.find(who);
39 if (iter != counters.end())
47 if (ServerInstance->Time() > reset)
50 reset = ServerInstance->Time() + secs;
54 bool shouldkick(User* who)
56 std::map<User*,int>::iterator iter = counters.find(who);
57 if (iter != counters.end())
59 return (iter->second >= this->lines);
66 std::map<User*,int>::iterator iter = counters.find(who);
67 if (iter != counters.end())
74 /** Handles channel mode +f
76 class MsgFlood : public ModeHandler
79 SimpleExtItem<floodsettings> ext;
80 MsgFlood(InspIRCd* Instance, Module* Creator) : ModeHandler(Creator, 'f', PARAM_SETONLY, MODETYPE_CHANNEL),
81 ext("messageflood", Creator) { }
83 ModePair ModeSet(User* source, User* dest, Channel* channel, const std::string ¶meter)
85 floodsettings* x = ext.get(channel);
87 return std::make_pair(true, (x->ban ? "*" : "")+ConvToStr(x->lines)+":"+ConvToStr(x->secs));
89 return std::make_pair(false, parameter);
92 ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
94 floodsettings *f = ext.get(channel);
100 strlcpy(ndata,parameter.c_str(),MAXBUF);
126 /* Set up the flood parameters for this channel */
127 int nlines = atoi(lines);
128 int nsecs = atoi(secs);
129 if ((nlines<2) || (nsecs<1))
131 source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str());
133 return MODEACTION_DENY;
139 parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs);
140 f = new floodsettings(ServerInstance,ban,nsecs,nlines);
142 channel->SetModeParam('f', parameter);
143 return MODEACTION_ALLOW;
147 std::string cur_param = channel->GetModeParameter('f');
148 parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs);
149 if (cur_param == parameter)
152 return MODEACTION_DENY;
156 if ((((nlines != f->lines) || (nsecs != f->secs) || (ban != f->ban))) && (((nsecs > 0) && (nlines > 0))))
158 floodsettings *fs = new floodsettings(ServerInstance,ban,nsecs,nlines);
159 ext.set(channel, fs);
160 channel->SetModeParam('f', parameter);
161 return MODEACTION_ALLOW;
165 return MODEACTION_DENY;
173 source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str());
175 return MODEACTION_DENY;
183 channel->SetModeParam('f', "");
184 return MODEACTION_ALLOW;
188 return MODEACTION_DENY;
192 class ModuleMsgFlood : public Module
198 ModuleMsgFlood(InspIRCd* Me)
199 : Module(Me), mf(Me, this)
201 if (!ServerInstance->Modes->AddMode(&mf))
202 throw ModuleException("Could not add new modes!");
203 Extensible::Register(&mf.ext);
204 Implementation eventlist[] = { I_OnUserPreNotice, I_OnUserPreMessage };
205 ServerInstance->Modules->Attach(eventlist, this, 2);
208 ModResult ProcessMessages(User* user,Channel* dest, const std::string &text)
210 if (!IS_LOCAL(user) || (CHANOPS_EXEMPT(ServerInstance, 'f') && dest->GetPrefixValue(user) == OP_VALUE))
212 return MOD_RES_PASSTHRU;
215 floodsettings *f = mf.ext.get(dest);
219 if (f->shouldkick(user))
221 /* Youre outttta here! */
225 std::vector<std::string> parameters;
226 parameters.push_back(dest->name);
227 parameters.push_back("+b");
228 parameters.push_back(user->MakeWildHost());
229 ServerInstance->SendMode(parameters, ServerInstance->FakeClient);
231 ServerInstance->PI->SendModeStr(dest->name, std::string("+b ") + user->MakeWildHost());
234 char kickmessage[MAXBUF];
235 snprintf(kickmessage, MAXBUF, "Channel flood triggered (limit is %d lines in %d secs)", f->lines, f->secs);
237 if (!dest->ServerKickUser(user, kickmessage))
246 return MOD_RES_PASSTHRU;
249 ModResult OnUserPreMessage(User *user, void *dest, int target_type, std::string &text, char status, CUList &exempt_list)
251 if (target_type == TYPE_CHANNEL)
252 return ProcessMessages(user,(Channel*)dest,text);
254 return MOD_RES_PASSTHRU;
257 ModResult OnUserPreNotice(User *user, void *dest, int target_type, std::string &text, char status, CUList &exempt_list)
259 if (target_type == TYPE_CHANNEL)
260 return ProcessMessages(user,(Channel*)dest,text);
262 return MOD_RES_PASSTHRU;
267 ServerInstance->Modes->DelMode(&mf);
272 return Version("$Id$", VF_COMMON | VF_VENDOR, API_VERSION);
276 MODULE_INIT(ModuleMsgFlood)