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00014 #include "inspircd.h"
00015
00016
00017
00020 class floodsettings : public classbase
00021 {
00022 private:
00023 InspIRCd *ServerInstance;
00024 public:
00025 bool ban;
00026 int secs;
00027 int lines;
00028 time_t reset;
00029 std::map<User*,int> counters;
00030
00031 floodsettings(InspIRCd *Instance) : ServerInstance(Instance), ban(0), secs(0), lines(0) {};
00032 floodsettings(InspIRCd *Instance, bool a, int b, int c) : ServerInstance(Instance), ban(a), secs(b), lines(c)
00033 {
00034 reset = ServerInstance->Time() + secs;
00035 };
00036
00037 void addmessage(User* who)
00038 {
00039 std::map<User*,int>::iterator iter = counters.find(who);
00040 if (iter != counters.end())
00041 {
00042 iter->second++;
00043 }
00044 else
00045 {
00046 counters[who] = 1;
00047 }
00048 if (ServerInstance->Time() > reset)
00049 {
00050 counters.clear();
00051 reset = ServerInstance->Time() + secs;
00052 }
00053 }
00054
00055 bool shouldkick(User* who)
00056 {
00057 std::map<User*,int>::iterator iter = counters.find(who);
00058 if (iter != counters.end())
00059 {
00060 return (iter->second >= this->lines);
00061 }
00062 else return false;
00063 }
00064
00065 void clear(User* who)
00066 {
00067 std::map<User*,int>::iterator iter = counters.find(who);
00068 if (iter != counters.end())
00069 {
00070 counters.erase(iter);
00071 }
00072 }
00073 };
00074
00077 class MsgFlood : public ModeHandler
00078 {
00079 public:
00080 MsgFlood(InspIRCd* Instance) : ModeHandler(Instance, 'f', 1, 0, false, MODETYPE_CHANNEL, false) { }
00081
00082 ModePair ModeSet(User* source, User* dest, Channel* channel, const std::string ¶meter)
00083 {
00084 floodsettings* x;
00085 if (channel->GetExt("flood",x))
00086 return std::make_pair(true, (x->ban ? "*" : "")+ConvToStr(x->lines)+":"+ConvToStr(x->secs));
00087 else
00088 return std::make_pair(false, parameter);
00089 }
00090
00091 bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, Channel* channel)
00092 {
00093
00094 return (their_param < our_param);
00095 }
00096
00097 ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding, bool)
00098 {
00099 floodsettings *f;
00100
00101 if (adding)
00102 {
00103 char ndata[MAXBUF];
00104 char* data = ndata;
00105 strlcpy(ndata,parameter.c_str(),MAXBUF);
00106 char* lines = data;
00107 char* secs = NULL;
00108 bool ban = false;
00109 if (*data == '*')
00110 {
00111 ban = true;
00112 lines++;
00113 }
00114 else
00115 {
00116 ban = false;
00117 }
00118 while (*data)
00119 {
00120 if (*data == ':')
00121 {
00122 *data = 0;
00123 data++;
00124 secs = data;
00125 break;
00126 }
00127 else data++;
00128 }
00129 if (secs)
00130 {
00131
00132 int nlines = atoi(lines);
00133 int nsecs = atoi(secs);
00134 if ((nlines<1) || (nsecs<1))
00135 {
00136 source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str());
00137 parameter.clear();
00138 return MODEACTION_DENY;
00139 }
00140 else
00141 {
00142 if (!channel->GetExt("flood", f))
00143 {
00144 parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs);
00145 floodsettings *fs = new floodsettings(ServerInstance,ban,nsecs,nlines);
00146 channel->Extend("flood",fs);
00147 channel->SetMode('f', true);
00148 channel->SetModeParam('f', parameter.c_str(), true);
00149 return MODEACTION_ALLOW;
00150 }
00151 else
00152 {
00153 std::string cur_param = channel->GetModeParameter('f');
00154 parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs);
00155 if (cur_param == parameter)
00156 {
00157
00158 return MODEACTION_DENY;
00159 }
00160 else
00161 {
00162 if ((((nlines != f->lines) || (nsecs != f->secs) || (ban != f->ban))) && (((nsecs > 0) && (nlines > 0))))
00163 {
00164 delete f;
00165 floodsettings *fs = new floodsettings(ServerInstance,ban,nsecs,nlines);
00166 channel->Shrink("flood");
00167 channel->Extend("flood",fs);
00168 channel->SetModeParam('f', cur_param.c_str(), false);
00169 channel->SetModeParam('f', parameter.c_str(), true);
00170 return MODEACTION_ALLOW;
00171 }
00172 else
00173 {
00174 return MODEACTION_DENY;
00175 }
00176 }
00177 }
00178 }
00179 }
00180 else
00181 {
00182 source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str());
00183 parameter.clear();
00184 return MODEACTION_DENY;
00185 }
00186 }
00187 else
00188 {
00189 if (channel->GetExt("flood", f))
00190 {
00191 delete f;
00192 channel->Shrink("flood");
00193 channel->SetMode('f', false);
00194 return MODEACTION_ALLOW;
00195 }
00196 }
00197
00198 return MODEACTION_DENY;
00199 }
00200 };
00201
00202 class ModuleMsgFlood : public Module
00203 {
00204
00205 MsgFlood* mf;
00206
00207 public:
00208
00209 ModuleMsgFlood(InspIRCd* Me)
00210 : Module(Me)
00211 {
00212
00213 mf = new MsgFlood(ServerInstance);
00214 if (!ServerInstance->Modes->AddMode(mf))
00215 throw ModuleException("Could not add new modes!");
00216 Implementation eventlist[] = { I_OnChannelDelete, I_OnUserPreNotice, I_OnUserPreMessage };
00217 ServerInstance->Modules->Attach(eventlist, this, 3);
00218 }
00219
00220 int ProcessMessages(User* user,Channel* dest, const std::string &text)
00221 {
00222 if (!IS_LOCAL(user) || (CHANOPS_EXEMPT(ServerInstance, 'f') && dest->GetStatus(user) == STATUS_OP))
00223 {
00224 return 0;
00225 }
00226
00227 floodsettings *f;
00228 if (dest->GetExt("flood", f))
00229 {
00230 f->addmessage(user);
00231 if (f->shouldkick(user))
00232 {
00233
00234 f->clear(user);
00235 if (f->ban)
00236 {
00237 std::vector<std::string> parameters;
00238 parameters.push_back(dest->name);
00239 parameters.push_back("+b");
00240 parameters.push_back(user->MakeWildHost());
00241 ServerInstance->SendMode(parameters, ServerInstance->FakeClient);
00242
00243 ServerInstance->PI->SendModeStr(dest->name, std::string("+b ") + user->MakeWildHost());
00244 }
00245
00246 char kickmessage[MAXBUF];
00247 snprintf(kickmessage, MAXBUF, "Channel flood triggered (limit is %d lines in %d secs)", f->lines, f->secs);
00248
00249 if (!dest->ServerKickUser(user, kickmessage, true))
00250 {
00251 delete dest;
00252 }
00253
00254 return 1;
00255 }
00256 }
00257
00258 return 0;
00259 }
00260
00261 virtual int OnUserPreMessage(User *user, void *dest, int target_type, std::string &text, char status, CUList &exempt_list)
00262 {
00263 if (target_type == TYPE_CHANNEL)
00264 return ProcessMessages(user,(Channel*)dest,text);
00265
00266 return 0;
00267 }
00268
00269 virtual int OnUserPreNotice(User *user, void *dest, int target_type, std::string &text, char status, CUList &exempt_list)
00270 {
00271 if (target_type == TYPE_CHANNEL)
00272 return ProcessMessages(user,(Channel*)dest,text);
00273
00274 return 0;
00275 }
00276
00277 void OnChannelDelete(Channel* chan)
00278 {
00279 floodsettings* f;
00280 if (chan->GetExt("flood", f))
00281 {
00282 delete f;
00283 chan->Shrink("flood");
00284 }
00285 }
00286
00287
00288 virtual ~ModuleMsgFlood()
00289 {
00290 ServerInstance->Modes->DelMode(mf);
00291 delete mf;
00292 }
00293
00294 virtual Version GetVersion()
00295 {
00296 return Version("$Id: m_messageflood.cpp 10783 2008-11-01 23:02:23Z w00t $", VF_COMMON | VF_VENDOR, API_VERSION);
00297 }
00298 };
00299
00300 MODULE_INIT(ModuleMsgFlood)
