X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_joinflood.cpp;h=3241020bfb32aa358b1580c4c749176918c09769;hb=HEAD;hp=b3abeaf61782a7d696e51612fb3b82e1f9daa572;hpb=fbe8169b82cb071dd57b66941093df654aa7b22c;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_joinflood.cpp b/src/modules/m_joinflood.cpp index b3abeaf61..3241020bf 100644 --- a/src/modules/m_joinflood.cpp +++ b/src/modules/m_joinflood.cpp @@ -1,49 +1,66 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2009 InspIRCd Development Team - * See: http://wiki.inspircd.org/Credits + * Copyright (C) 2013, 2016-2020 Sadie Powell + * Copyright (C) 2012-2014 Attila Molnar + * Copyright (C) 2012, 2019 Robby + * Copyright (C) 2009 Daniel De Graaf + * Copyright (C) 2008 Robin Burchell + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2006-2007, 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 "modules/server.h" -/* $ModDesc: Provides channel mode +j (join flood protection) */ +enum +{ + // From RFC 2182. + ERR_UNAVAILRESOURCE = 437 +}; + +// The number of seconds the channel will be closed for. +static unsigned int duration; /** Holds settings and state associated with channel mode +j */ -class joinfloodsettings : public classbase +class joinfloodsettings { - private: - InspIRCd* ServerInstance; public: - int secs; - int joins; + unsigned int secs; + unsigned int joins; time_t reset; time_t unlocktime; - int counter; - bool locked; + unsigned int counter; - joinfloodsettings(InspIRCd *Instance, int b, int c) : ServerInstance(Instance), secs(b), joins(c) + joinfloodsettings(unsigned int b, unsigned int c) + : secs(b), joins(c), unlocktime(0), counter(0) { reset = ServerInstance->Time() + secs; - counter = 0; - locked = false; - }; + } void addjoin() { - counter++; if (ServerInstance->Time() > reset) { - counter = 0; + counter = 1; reset = ServerInstance->Time() + secs; } + else + counter++; } bool shouldlock() @@ -58,216 +75,138 @@ class joinfloodsettings : public classbase bool islocked() { - if (locked) - { - if (ServerInstance->Time() > unlocktime) - { - locked = false; - return false; - } - else - { - return true; - } - } - return false; + if (ServerInstance->Time() > unlocktime) + unlocktime = 0; + + return (unlocktime != 0); } void lock() { - locked = true; - unlocktime = ServerInstance->Time() + 60; + unlocktime = ServerInstance->Time() + duration; } + bool operator==(const joinfloodsettings& other) const + { + return ((this->secs == other.secs) && (this->joins == other.joins)); + } }; /** Handles channel mode +j */ -class JoinFlood : public ModeHandler +class JoinFlood : public ParamMode > { public: - JoinFlood(InspIRCd* Instance) : ModeHandler(Instance, 'j', 1, 0, false, MODETYPE_CHANNEL, false) { } - - ModePair ModeSet(User* source, User* dest, Channel* channel, const std::string ¶meter) + JoinFlood(Module* Creator) + : ParamMode >(Creator, "joinflood", 'j') { - joinfloodsettings* x; - if (channel->GetExt("joinflood",x)) - return std::make_pair(true, ConvToStr(x->joins)+":"+ConvToStr(x->secs)); - else - return std::make_pair(false, parameter); + syntax = ":"; } - ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding, bool) + ModeAction OnSet(User* source, Channel* channel, std::string& parameter) CXX11_OVERRIDE { - joinfloodsettings* dummy; - - 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* joins = data; - char* secs = NULL; - while (*data) - { - if (*data == ':') - { - *data = 0; - data++; - secs = data; - break; - } - else data++; - } - if (secs) - - { - /* Set up the flood parameters for this channel */ - int njoins = atoi(joins); - int nsecs = atoi(secs); - if ((njoins<1) || (nsecs<1)) - { - source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str()); - parameter.clear(); - return MODEACTION_DENY; - } - else - { - if (!channel->GetExt("joinflood", dummy)) - { - parameter = ConvToStr(njoins) + ":" +ConvToStr(nsecs); - joinfloodsettings *f = new joinfloodsettings(ServerInstance, nsecs, njoins); - channel->Extend("joinflood", f); - channel->SetModeParam('j', parameter); - return MODEACTION_ALLOW; - } - else - { - std::string cur_param = channel->GetModeParameter('j'); - parameter = ConvToStr(njoins) + ":" +ConvToStr(nsecs); - if (cur_param == parameter) - { - // mode params match - return MODEACTION_DENY; - } - else - { - // new mode param, replace old with new - if ((nsecs > 0) && (njoins > 0)) - { - joinfloodsettings* f; - channel->GetExt("joinflood", f); - delete f; - f = new joinfloodsettings(ServerInstance, nsecs, njoins); - channel->Shrink("joinflood"); - channel->Extend("joinflood", f); - channel->SetModeParam('j', parameter); - return MODEACTION_ALLOW; - } - else - { - return MODEACTION_DENY; - } - } - } - } - } - else - { - source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str()); - return MODEACTION_DENY; - } + source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter)); + return MODEACTION_DENY; } - else + + /* Set up the flood parameters for this channel */ + unsigned int njoins = ConvToNum(parameter.substr(0, colon)); + unsigned int nsecs = ConvToNum(parameter.substr(colon+1)); + if ((njoins<1) || (nsecs<1)) { - if (channel->GetExt("joinflood", dummy)) - { - joinfloodsettings *f; - channel->GetExt("joinflood", f); - delete f; - channel->Shrink("joinflood"); - channel->SetModeParam('j', ""); - return MODEACTION_ALLOW; - } + source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter)); + return MODEACTION_DENY; } - return MODEACTION_DENY; + + ext.set(channel, new joinfloodsettings(nsecs, njoins)); + return MODEACTION_ALLOW; + } + + void SerializeParam(Channel* chan, const joinfloodsettings* jfs, std::string& out) + { + out.append(ConvToStr(jfs->joins)).push_back(':'); + out.append(ConvToStr(jfs->secs)); } }; -class ModuleJoinFlood : public Module +class ModuleJoinFlood + : public Module + , public ServerProtocol::LinkEventListener { - + private: JoinFlood jf; + time_t ignoreuntil; + unsigned long bootwait; + unsigned long splitwait; public: + // Stop GCC warnings about the deprecated OnServerSplit event. + using ServerProtocol::LinkEventListener::OnServerSplit; - ModuleJoinFlood(InspIRCd* Me) - : Module(Me), jf(Me) + ModuleJoinFlood() + : ServerProtocol::LinkEventListener(this) + , jf(this) + , ignoreuntil(0) { + } - if (!ServerInstance->Modes->AddMode(&jf)) - throw ModuleException("Could not add new modes!"); - Implementation eventlist[] = { I_OnChannelDelete, I_OnUserPreJoin, I_OnUserJoin }; - ServerInstance->Modules->Attach(eventlist, this, 3); + void ReadConfig(ConfigStatus&) CXX11_OVERRIDE + { + ConfigTag* tag = ServerInstance->Config->ConfValue("joinflood"); + duration = tag->getDuration("duration", 60, 10, 600); + bootwait = tag->getDuration("bootwait", 30); + splitwait = tag->getDuration("splitwait", 30); + + ignoreuntil = ServerInstance->startup_time + bootwait; } - virtual int OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven) + void OnServerSplit(const Server* server, bool error) CXX11_OVERRIDE + { + if (splitwait) + ignoreuntil = ServerInstance->Time() + splitwait; + } + + ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE { if (chan) { - joinfloodsettings *f; - if (chan->GetExt("joinflood", f)) + joinfloodsettings *f = jf.ext.get(chan); + if (f && f->islocked()) { - if (f->islocked()) - { - user->WriteNumeric(609, "%s %s :This channel is temporarily unavailable (+j). Please try again later.",user->nick.c_str(),chan->name.c_str()); - return 1; - } + user->WriteNumeric(ERR_UNAVAILRESOURCE, chan->name, "This channel is temporarily unavailable (+j is set). Please try again later."); + return MOD_RES_DENY; } } - return 0; + return MOD_RES_PASSTHRU; } - virtual void OnUserJoin(User* user, Channel* channel, bool sync, bool &silent) + void OnUserJoin(Membership* memb, bool sync, bool created, CUList& excepts) CXX11_OVERRIDE { - joinfloodsettings *f; - /* We arent interested in JOIN events caused by a network burst */ - if (sync) + if (sync || ignoreuntil > ServerInstance->Time()) return; + joinfloodsettings *f = jf.ext.get(memb->chan); + /* But all others are OK */ - if (channel->GetExt("joinflood",f)) + if ((f) && (!f->islocked())) { f->addjoin(); if (f->shouldlock()) { f->clear(); f->lock(); - channel->WriteChannelWithServ((char*)ServerInstance->Config->ServerName, "NOTICE %s :This channel has been closed to new users for 60 seconds because there have been more than %d joins in %d seconds.", channel->name.c_str(), f->joins, f->secs); + memb->chan->WriteNotice(InspIRCd::Format("This channel has been closed to new users for %u seconds because there have been more than %d joins in %d seconds.", duration, f->joins, f->secs)); } } } - void OnChannelDelete(Channel* chan) - { - joinfloodsettings *f; - if (chan->GetExt("joinflood",f)) - { - delete f; - chan->Shrink("joinflood"); - } - } - - - virtual ~ModuleJoinFlood() - { - ServerInstance->Modes->DelMode(&jf); - } - - virtual Version GetVersion() + Version GetVersion() CXX11_OVERRIDE { - return Version("$Id$", VF_COMMON | VF_VENDOR, API_VERSION); + return Version("Adds channel mode j (joinflood) which helps protect against spammers which mass-join channels.", VF_VENDOR); } };