X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_messageflood.cpp;h=329d77aac69ffc594c81a038faac2188ae294ff1;hb=d38595e7e14e7509e744d33df657d50d00cc201f;hp=b3d1090e14757b3c4dab3d1cf119c7f811504623;hpb=2e44459aa65ddc93fe6e6ae83ee9120ab4c9cec1;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_messageflood.cpp b/src/modules/m_messageflood.cpp index b3d1090e1..329d77aac 100644 --- a/src/modules/m_messageflood.cpp +++ b/src/modules/m_messageflood.cpp @@ -1,304 +1,200 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2007 InspIRCd Development Team - * See: http://www.inspircd.org/wiki/index.php/Credits + * Copyright (C) 2013, 2017-2019 Sadie Powell + * Copyright (C) 2012-2014, 2016 Attila Molnar + * Copyright (C) 2012, 2019 Robby + * Copyright (C) 2009 Daniel De Graaf + * Copyright (C) 2007-2008 Robin Burchell + * Copyright (C) 2007 John Brooks + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2006, 2008, 2010 Craig Edwards * - * This program is free but copyrighted software; see - * the file COPYING for details. + * 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" -#include "users.h" -#include "channels.h" -#include "modules.h" -/* $ModDesc: Provides channel mode +f (message flood protection) */ +#include "inspircd.h" +#include "modules/ctctags.h" +#include "modules/exemption.h" /** Holds flood settings and state for mode +f */ -class floodsettings : public classbase +class floodsettings { public: bool ban; - int secs; - int lines; + unsigned int secs; + unsigned int lines; time_t reset; - std::map counters; + insp::flat_map counters; - floodsettings() : ban(0), secs(0), lines(0) {}; - floodsettings(bool a, int b, int c) : ban(a), secs(b), lines(c) + floodsettings(bool a, unsigned int b, unsigned int c) + : ban(a) + , secs(b) + , lines(c) { - reset = time(NULL) + secs; - }; + reset = ServerInstance->Time() + secs; + } - void addmessage(userrec* who) + bool addmessage(User* who, double weight) { - std::map::iterator iter = counters.find(who); - if (iter != counters.end()) - { - iter->second++; - } - else - { - counters[who] = 1; - } - if (time(NULL) > reset) + if (ServerInstance->Time() > reset) { counters.clear(); - reset = time(NULL) + secs; + reset = ServerInstance->Time() + secs; } - } - bool shouldkick(userrec* who) - { - std::map::iterator iter = counters.find(who); - if (iter != counters.end()) - { - return (iter->second >= this->lines); - } - else return false; + counters[who] += weight; + return (counters[who] >= this->lines); } - void clear(userrec* who) + void clear(User* who) { - std::map::iterator iter = counters.find(who); - if (iter != counters.end()) - { - counters.erase(iter); - } + counters.erase(who); } }; /** Handles channel mode +f */ -class MsgFlood : public ModeHandler +class MsgFlood : public ParamMode > { 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) + MsgFlood(Module* Creator) + : ParamMode >(Creator, "flood", 'f') { - 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); + syntax = "[*]:"; } - bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel) + ModeAction OnSet(User* source, Channel* channel, std::string& parameter) CXX11_OVERRIDE { - /* 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) + std::string::size_type colon = parameter.find(':'); + if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos)) { - 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; - } + source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter)); + return MODEACTION_DENY; } - else + + /* Set up the flood parameters for this channel */ + bool ban = (parameter[0] == '*'); + unsigned int nlines = ConvToNum(parameter.substr(ban ? 1 : 0, ban ? colon-1 : colon)); + unsigned int nsecs = ConvToNum(parameter.substr(colon+1)); + + if ((nlines<2) || (nsecs<1)) { - if (channel->GetExt("flood", f)) - { - DELETE(f); - channel->Shrink("flood"); - channel->SetMode('f', false); - return MODEACTION_ALLOW; - } + source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter)); + return MODEACTION_DENY; } - - return MODEACTION_DENY; + + ext.set(channel, new floodsettings(ban, nsecs, nlines)); + return MODEACTION_ALLOW; + } + + void SerializeParam(Channel* chan, const floodsettings* fs, std::string& out) + { + if (fs->ban) + out.push_back('*'); + out.append(ConvToStr(fs->lines)).push_back(':'); + out.append(ConvToStr(fs->secs)); } }; -class ModuleMsgFlood : public Module +class ModuleMsgFlood + : public Module + , public CTCTags::EventListener { - - MsgFlood* mf; - +private: + CheckExemption::EventProvider exemptionprov; + MsgFlood mf; + double notice; + double privmsg; + double tagmsg; + public: - - ModuleMsgFlood(InspIRCd* Me) - : Module(Me) + ModuleMsgFlood() + : CTCTags::EventListener(this) + , exemptionprov(this) + , mf(this) { - - 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) + + void ReadConfig(ConfigStatus&) CXX11_OVERRIDE { - if (!IS_LOCAL(user) || CHANOPS_EXEMPT(ServerInstance, 'f') && dest->GetStatus(user) == STATUS_OP) - { - return; - } + ConfigTag* tag = ServerInstance->Config->ConfValue("messageflood"); + notice = tag->getFloat("notice", 1.0); + privmsg = tag->getFloat("privmsg", 1.0); + tagmsg = tag->getFloat("tagmsg", 0.2); + } + + ModResult HandleMessage(User* user, const MessageTarget& target, double weight) + { + if (target.type != MessageTarget::TYPE_CHANNEL) + return MOD_RES_PASSTHRU; + + Channel* dest = target.Get(); + if ((!IS_LOCAL(user)) || !dest->IsModeSet(mf)) + return MOD_RES_PASSTHRU; - floodsettings *f; - if (dest->GetExt("flood", f)) + ModResult res = CheckExemption::Call(exemptionprov, user, dest, "flood"); + if (res == MOD_RES_ALLOW) + return MOD_RES_PASSTHRU; + + floodsettings *f = mf.ext.get(dest); + if (f) { - f->addmessage(user); - if (f->shouldkick(user)) + if (f->addmessage(user, weight)) { /* 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); + Modes::ChangeList changelist; + changelist.push_add(ServerInstance->Modes->FindMode('b', MODETYPE_CHANNEL), "*!*@" + user->GetDisplayedHost()); + ServerInstance->Modes->Process(ServerInstance->FakeClient, dest, NULL, changelist); } - 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); + + const std::string kickMessage = "Channel flood triggered (trigger is " + ConvToStr(f->lines) + + " lines in " + ConvToStr(f->secs) + " secs)"; + + dest->KickUser(ServerInstance->FakeClient, user, kickMessage); + + return MOD_RES_DENY; } } - } - 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); - } + return MOD_RES_PASSTHRU; } - virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list) + ModResult OnUserPreMessage(User* user, const MessageTarget& target, MessageDetails& details) CXX11_OVERRIDE { - if (target_type == TYPE_CHANNEL) - { - ProcessMessages(user,(chanrec*)dest,text); - } + return HandleMessage(user, target, (details.type == MSG_PRIVMSG ? privmsg : notice)); } - void OnChannelDelete(chanrec* chan) + ModResult OnUserPreTagMessage(User* user, const MessageTarget& target, CTCTags::TagMessageDetails& details) CXX11_OVERRIDE { - floodsettings* f; - if (chan->GetExt("flood", f)) - { - DELETE(f); - chan->Shrink("flood"); - } + return HandleMessage(user, target, tagmsg); } - void Implements(char* List) + void Prioritize() CXX11_OVERRIDE { - List[I_OnChannelDelete] = List[I_OnUserNotice] = List[I_OnUserMessage] = 1; + // 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); } - virtual ~ModuleMsgFlood() - { - ServerInstance->Modes->DelMode(mf); - DELETE(mf); - } - - virtual Version GetVersion() + Version GetVersion() CXX11_OVERRIDE { - return Version(1, 1, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION); + return Version("Adds channel mode f (flood) which helps protect against spammers which mass-message channels.", VF_VENDOR); } }; -MODULE_INIT(ModuleMsgFlood); +MODULE_INIT(ModuleMsgFlood)