X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_messageflood.cpp;h=9ff17924d1c38bbb154c4a959fa151824894a221;hb=551d687ec6d7ce44be35fae0dd7345fe73c4f63a;hp=e5263719b3c5d106e4e98166316139fbb14972d1;hpb=bab14f0dd2345c9d7dcbc47c918563709e1ac094;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_messageflood.cpp b/src/modules/m_messageflood.cpp index e5263719b..9ff17924d 100644 --- a/src/modules/m_messageflood.cpp +++ b/src/modules/m_messageflood.cpp @@ -1 +1,204 @@ -/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * InspIRCd: (C) 2002-2007 InspIRCd Development Team * See: http://www.inspircd.org/wiki/index.php/Credits * * This program is free but copyrighted software; see * the file COPYING for details. * * --------------------------------------------------- */ #include "inspircd.h" #include "users.h" #include "channels.h" #include "modules.h" /* $ModDesc: Provides channel mode +f (message flood protection) */ /** Holds flood settings and state for mode +f */ class floodsettings : public classbase { public: bool ban; int secs; int lines; time_t reset; std::map counters; floodsettings() : ban(0), secs(0), lines(0) {}; floodsettings(bool a, int b, int c) : ban(a), secs(b), lines(c) { reset = time(NULL) + secs; }; void addmessage(userrec* who) { std::map::iterator iter = counters.find(who); if (iter != counters.end()) { iter->second++; } else { counters[who] = 1; } if (time(NULL) > reset) { counters.clear(); reset = time(NULL) + secs; } } bool shouldkick(userrec* who) { std::map::iterator iter = counters.find(who); if (iter != counters.end()) { return (iter->second >= this->lines); } else return false; } void clear(userrec* who) { std::map::iterator iter = counters.find(who); if (iter != counters.end()) { counters.erase(iter); } } }; /** Handles channel mode +f */ class MsgFlood : public ModeHandler { public: MsgFlood(InspIRCd* Instance) : ModeHandler(Instance, 'f', 1, 0, false, MODETYPE_CHANNEL, false) { } ModePair ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter) { floodsettings* x; if (channel->GetExt("flood",x)) return std::make_pair(true, (x->ban ? "*" : "")+ConvToStr(x->lines)+":"+ConvToStr(x->secs)); else return std::make_pair(false, parameter); } bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel) { /* When TS is equal, the alphabetically later one wins */ return (their_param < our_param); } ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding) { floodsettings *f; if (adding) { char ndata[MAXBUF]; char* data = ndata; strlcpy(ndata,parameter.c_str(),MAXBUF); char* lines = data; char* secs = NULL; bool ban = false; if (*data == '*') { ban = true; lines++; } else { ban = false; } while (*data) { if (*data == ':') { *data = 0; data++; secs = data; break; } else data++; } if (secs) { /* Set up the flood parameters for this channel */ int nlines = atoi(lines); int nsecs = atoi(secs); if ((nlines<1) || (nsecs<1)) { source->WriteServ("608 %s %s :Invalid flood parameter",source->nick,channel->name); parameter.clear(); return MODEACTION_DENY; } else { if (!channel->GetExt("flood", f)) { parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs); floodsettings *f = new floodsettings(ban,nsecs,nlines); channel->Extend("flood",f); channel->SetMode('f', true); channel->SetModeParam('f', parameter.c_str(), true); return MODEACTION_ALLOW; } else { std::string cur_param = channel->GetModeParameter('f'); parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs); if (cur_param == parameter) { // mode params match return MODEACTION_DENY; } else { if (((nlines != f->lines) || (nsecs != f->secs)) && ((nsecs > 0) && (nlines > 0)) || (ban != f->ban)) { delete f; floodsettings *f = new floodsettings(ban,nsecs,nlines); channel->Shrink("flood"); channel->Extend("flood",f); channel->SetModeParam('f', cur_param.c_str(), false); channel->SetModeParam('f', parameter.c_str(), true); return MODEACTION_ALLOW; } else { return MODEACTION_DENY; } } } } } else { source->WriteServ("608 %s %s :Invalid flood parameter",source->nick,channel->name); parameter.clear(); return MODEACTION_DENY; } } else { if (channel->GetExt("flood", f)) { DELETE(f); channel->Shrink("flood"); channel->SetMode('f', false); return MODEACTION_ALLOW; } } return MODEACTION_DENY; } }; class ModuleMsgFlood : public Module { MsgFlood* mf; public: ModuleMsgFlood(InspIRCd* Me) : Module(Me) { mf = new MsgFlood(ServerInstance); if (!ServerInstance->AddMode(mf, 'f')) throw ModuleException("Could not add new modes!"); } void ProcessMessages(userrec* user,chanrec* dest, const std::string &text) { if (!IS_LOCAL(user) || CHANOPS_EXEMPT(ServerInstance, 'f') && dest->GetStatus(user) == STATUS_OP) { return; } floodsettings *f; if (dest->GetExt("flood", f)) { f->addmessage(user); if (f->shouldkick(user)) { /* Youre outttta here! */ f->clear(user); if (f->ban) { const char* parameters[3]; parameters[0] = dest->name; parameters[1] = "+b"; parameters[2] = user->MakeWildHost(); ServerInstance->SendMode(parameters,3,user); std::deque n; /* Propogate the ban to other servers. * We dont know what protocol we may be using, * so this event is picked up by our protocol * module and formed into a ban command that * suits the protocol in use. */ n.push_back(dest->name); n.push_back("+b"); n.push_back(user->MakeWildHost()); Event rmode((char *)&n, NULL, "send_mode"); rmode.Send(ServerInstance); } char kickmessage[MAXBUF]; snprintf(kickmessage, MAXBUF, "Channel flood triggered (limit is %d lines in %d secs)", f->lines, f->secs); dest->ServerKickUser(user, kickmessage, true); } } } virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list) { if (target_type == TYPE_CHANNEL) { ProcessMessages(user,(chanrec*)dest,text); } } virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list) { if (target_type == TYPE_CHANNEL) { ProcessMessages(user,(chanrec*)dest,text); } } void OnChannelDelete(chanrec* chan) { floodsettings* f; if (chan->GetExt("flood", f)) { DELETE(f); chan->Shrink("flood"); } } void Implements(char* List) { List[I_OnChannelDelete] = List[I_OnUserNotice] = List[I_OnUserMessage] = 1; } virtual ~ModuleMsgFlood() { ServerInstance->Modes->DelMode(mf); DELETE(mf); } virtual Version GetVersion() { return Version(1, 1, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION); } }; MODULE_INIT(ModuleMsgFlood) \ No newline at end of file +/* + * InspIRCd -- Internet Relay Chat Daemon + * + * Copyright (C) 2009 Daniel De Graaf + * Copyright (C) 2008 Pippijn van Steenhoven + * Copyright (C) 2007 Robin Burchell + * Copyright (C) 2007 John Brooks + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2006 Craig Edwards + * Copyright (C) 2006 Oliver Lupton + * + * This file is part of InspIRCd. InspIRCd is free software: you can + * redistribute it and/or modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + + +#include "inspircd.h" + +/* $ModDesc: Provides channel mode +f (message flood protection) */ + +/** Holds flood settings and state for mode +f + */ +class floodsettings +{ + public: + bool ban; + unsigned int secs; + unsigned int lines; + time_t reset; + std::map counters; + + floodsettings(bool a, int b, int c) : ban(a), secs(b), lines(c) + { + reset = ServerInstance->Time() + secs; + } + + bool addmessage(User* who) + { + if (ServerInstance->Time() > reset) + { + counters.clear(); + reset = ServerInstance->Time() + secs; + } + + return (++counters[who] >= this->lines); + } + + void clear(User* who) + { + std::map::iterator iter = counters.find(who); + if (iter != counters.end()) + { + counters.erase(iter); + } + } +}; + +/** Handles channel mode +f + */ +class MsgFlood : public ModeHandler +{ + public: + SimpleExtItem ext; + MsgFlood(Module* Creator) : ModeHandler(Creator, "flood", 'f', PARAM_SETONLY, MODETYPE_CHANNEL), + ext("messageflood", Creator) { } + + ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding) + { + if (adding) + { + std::string::size_type colon = parameter.find(':'); + if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos)) + { + source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str()); + return MODEACTION_DENY; + } + + /* Set up the flood parameters for this channel */ + bool ban = (parameter[0] == '*'); + unsigned int nlines = ConvToInt(parameter.substr(ban ? 1 : 0, ban ? colon-1 : colon)); + unsigned int nsecs = ConvToInt(parameter.substr(colon+1)); + + if ((nlines<2) || (nsecs<1)) + { + source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str()); + return MODEACTION_DENY; + } + + floodsettings* f = ext.get(channel); + if ((f) && (nlines == f->lines) && (nsecs == f->secs) && (ban == f->ban)) + // mode params match + return MODEACTION_DENY; + + ext.set(channel, new floodsettings(ban, nsecs, nlines)); + parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" + ConvToStr(nsecs); + channel->SetModeParam('f', parameter); + return MODEACTION_ALLOW; + } + else + { + if (!channel->IsModeSet('f')) + return MODEACTION_DENY; + + ext.unset(channel); + channel->SetModeParam('f', ""); + return MODEACTION_ALLOW; + } + } +}; + +class ModuleMsgFlood : public Module +{ + MsgFlood mf; + + public: + + ModuleMsgFlood() + : mf(this) + { + } + + void init() + { + ServerInstance->Modules->AddService(mf); + ServerInstance->Modules->AddService(mf.ext); + Implementation eventlist[] = { I_OnUserPreNotice, I_OnUserPreMessage }; + ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation)); + } + + ModResult ProcessMessages(User* user,Channel* dest, const std::string &text) + { + if ((!IS_LOCAL(user)) || !dest->IsModeSet('f')) + return MOD_RES_PASSTHRU; + + if (ServerInstance->OnCheckExemption(user,dest,"flood") == MOD_RES_ALLOW) + return MOD_RES_PASSTHRU; + + floodsettings *f = mf.ext.get(dest); + if (f) + { + if (f->addmessage(user)) + { + /* Youre outttta here! */ + f->clear(user); + if (f->ban) + { + std::vector parameters; + parameters.push_back(dest->name); + parameters.push_back("+b"); + parameters.push_back(user->MakeWildHost()); + ServerInstance->SendGlobalMode(parameters, ServerInstance->FakeClient); + } + + char kickmessage[MAXBUF]; + snprintf(kickmessage, MAXBUF, "Channel flood triggered (limit is %u lines in %u secs)", f->lines, f->secs); + + dest->KickUser(ServerInstance->FakeClient, user, kickmessage); + + return MOD_RES_DENY; + } + } + + return MOD_RES_PASSTHRU; + } + + ModResult OnUserPreMessage(User *user, void *dest, int target_type, std::string &text, char status, CUList &exempt_list) + { + if (target_type == TYPE_CHANNEL) + return ProcessMessages(user,(Channel*)dest,text); + + return MOD_RES_PASSTHRU; + } + + ModResult OnUserPreNotice(User *user, void *dest, int target_type, std::string &text, char status, CUList &exempt_list) + { + if (target_type == TYPE_CHANNEL) + return ProcessMessages(user,(Channel*)dest,text); + + return MOD_RES_PASSTHRU; + } + + void Prioritize() + { + // we want to be after all modules that might deny the message (e.g. m_muteban, m_noctcp, m_blockcolor, etc.) + ServerInstance->Modules->SetPriority(this, I_OnUserPreMessage, PRIORITY_LAST); + ServerInstance->Modules->SetPriority(this, I_OnUserPreNotice, PRIORITY_LAST); + } + + Version GetVersion() + { + return Version("Provides channel mode +f (message flood protection)", VF_VENDOR); + } +}; + +MODULE_INIT(ModuleMsgFlood)