-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
*
- * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
- * E-mail:
- * <brain@chatspike.net>
- * <Craig@chatspike.net>
- *
- * Written by Craig Edwards, Craig McLure, and others.
- * This program is free but copyrighted software; see
- * the file COPYING for details.
+ * Copyright (C) 2013, 2016-2020 Sadie Powell <sadie@witchery.services>
+ * Copyright (C) 2012-2014 Attila Molnar <attilamolnar@hush.com>
+ * Copyright (C) 2012, 2019 Robby <robby@chatbelgie.be>
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2006-2007, 2010 Craig Edwards <brain@inspircd.org>
*
- * ---------------------------------------------------
+ * 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 <http://www.gnu.org/licenses/>.
*/
-using namespace std;
-#include <stdio.h>
-#include <map>
-#include "users.h"
-#include "channels.h"
-#include "modules.h"
-#include "helperfuncs.h"
+#include "inspircd.h"
+#include "modules/server.h"
+
+enum
+{
+ // From RFC 2182.
+ ERR_UNAVAILRESOURCE = 437
+};
-/* $ModDesc: Provides channel mode +f (message flood protection) */
+// 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:
-
- int secs;
- int joins;
+ unsigned int secs;
+ unsigned int joins;
time_t reset;
time_t unlocktime;
- int counter;
- bool locked;
+ unsigned int counter;
- joinfloodsettings() : secs(0), joins(0) {};
- joinfloodsettings(int b, int c) : secs(b), joins(c)
+ joinfloodsettings(unsigned int b, unsigned int c)
+ : secs(b), joins(c), unlocktime(0), counter(0)
{
- reset = time(NULL) + secs;
- counter = 0;
- locked = false;
- log(DEBUG,"Create new joinfloodsettings: %lu %lu",time(NULL),reset);
- };
+ reset = ServerInstance->Time() + secs;
+ }
void addjoin()
{
- counter++;
- log(DEBUG,"joinflood counter is %d",counter);
- if (time(NULL) > reset)
+ if (ServerInstance->Time() > reset)
{
- log(DEBUG,"joinflood counter reset");
- counter = 0;
- reset = time(NULL) + secs;
+ counter = 1;
+ reset = ServerInstance->Time() + secs;
}
+ else
+ counter++;
}
bool shouldlock()
void clear()
{
- log(DEBUG,"joinflood counter clear");
counter = 0;
}
bool islocked()
{
- if (locked)
- {
- if (time(NULL) > unlocktime)
- {
- locked = false;
- return false;
- }
- else
- {
- return true;
- }
- }
- return false;
+ if (ServerInstance->Time() > unlocktime)
+ unlocktime = 0;
+
+ return (unlocktime != 0);
}
void lock()
{
- log(DEBUG,"joinflood lock");
- locked = true;
- unlocktime = time(NULL) + 60;
+ unlocktime = ServerInstance->Time() + duration;
}
-
+ bool operator==(const joinfloodsettings& other) const
+ {
+ return ((this->secs == other.secs) && (this->joins == other.joins));
+ }
};
-class ModuleJoinFlood : public Module
+/** Handles channel mode +j
+ */
+class JoinFlood : public ParamMode<JoinFlood, SimpleExtItem<joinfloodsettings> >
{
- Server *Srv;
-
public:
-
- ModuleJoinFlood(Server* Me)
- : Module::Module(Me)
+ JoinFlood(Module* Creator)
+ : ParamMode<JoinFlood, SimpleExtItem<joinfloodsettings> >(Creator, "joinflood", 'j')
{
- Srv = Me;
- Srv->AddExtendedMode('j',MT_CHANNEL,false,1,0);
- }
-
- virtual int OnExtendedMode(userrec* user, void* target, char modechar, int type, bool mode_on, string_list ¶ms)
- {
- if ((modechar == 'j') && (type == MT_CHANNEL))
- {
- if (mode_on)
- {
- std::string FloodParams = params[0];
- chanrec* c = (chanrec*)target;
- char ndata[MAXBUF];
- char* data = ndata;
- strlcpy(ndata,FloodParams.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))
- {
- WriteServ(user->fd,"608 %s %s :Invalid flood parameter",user->nick,c->name);
- return 0;
- }
- else
- {
- if (!c->GetExt("joinflood"))
- {
- joinfloodsettings *f = new joinfloodsettings(nsecs,njoins);
- c->Extend("joinflood",(char*)f);
- }
- }
- return 1;
- }
- else
- {
- WriteServ(user->fd,"608 %s %s :Invalid flood parameter",user->nick,c->name);
- return 0;
- }
-
- }
- else
- {
- chanrec* c = (chanrec*)target;
- if (c->GetExt("joinflood"))
- {
- joinfloodsettings *f = (joinfloodsettings*)c->GetExt("joinflood");
- delete f;
- c->Shrink("joinflood");
- }
- }
- return 1;
- }
- return 0;
+ syntax = "<joins>:<seconds>";
}
- virtual int OnUserPreJoin(userrec* user, chanrec* chan, const char* cname)
+ ModeAction OnSet(User* source, Channel* channel, std::string& parameter) CXX11_OVERRIDE
{
- if (chan)
+ std::string::size_type colon = parameter.find(':');
+ if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos))
{
- joinfloodsettings *f = (joinfloodsettings*)chan->GetExt("joinflood");
- if (f)
- {
- if (f->islocked())
- {
- WriteServ(user->fd,"609 %s %s :This channel is temporarily unavailable (+j). Please try again later.",user->nick,chan->name);
- return 1;
- }
- }
+ source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
+ return MODEACTION_DENY;
}
- return 0;
- }
- virtual void OnUserJoin(userrec* user, chanrec* channel)
- {
- joinfloodsettings *f = (joinfloodsettings*)channel->GetExt("joinflood");
- if (f)
+ /* Set up the flood parameters for this channel */
+ unsigned int njoins = ConvToNum<unsigned int>(parameter.substr(0, colon));
+ unsigned int nsecs = ConvToNum<unsigned int>(parameter.substr(colon+1));
+ if ((njoins<1) || (nsecs<1))
{
- f->addjoin();
- if (f->shouldlock())
- {
- f->clear();
- f->lock();
- WriteChannelWithServ((char*)Srv->GetServerName().c_str(), channel, "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,f->joins,f->secs);
- }
+ source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
+ return MODEACTION_DENY;
}
- }
- void OnChannelDelete(chanrec* chan)
- {
- if (chan->GetExt("joinflood"))
- {
- joinfloodsettings *f = (joinfloodsettings*)chan->GetExt("joinflood");
- delete f;
- chan->Shrink("joinflood");
- }
+ ext.set(channel, new joinfloodsettings(nsecs, njoins));
+ return MODEACTION_ALLOW;
}
- void Implements(char* List)
+ void SerializeParam(Channel* chan, const joinfloodsettings* jfs, std::string& out)
{
- List[I_On005Numeric] = List[I_OnExtendedMode] = List[I_OnChannelDelete] = List[I_OnUserPreJoin] = List[I_OnUserJoin] = 1;
+ out.append(ConvToStr(jfs->joins)).push_back(':');
+ out.append(ConvToStr(jfs->secs));
}
+};
+
+class ModuleJoinFlood
+ : public Module
+ , public ServerProtocol::LinkEventListener
+{
+ private:
+ JoinFlood jf;
+ time_t ignoreuntil;
+ unsigned long bootwait;
+ unsigned long splitwait;
- virtual void On005Numeric(std::string &output)
- {
- std::stringstream line(output);
- std::string temp1, temp2;
- while (!line.eof())
- {
- line >> temp1;
- if (temp1.substr(0,10) == "CHANMODES=")
- {
- // By doing this we're *assuming* no other module has fucked up the CHANMODES=
- // section of the 005 numeric. If they have, we're going DOWN in a blaze of glory,
- // with a honking great EXCEPTION :)
- temp1.insert(temp1.find(",")+1,"j");
- }
- temp2 = temp2 + temp1 + " ";
- }
- if (temp2.length())
- output = temp2.substr(0,temp2.length()-1);
- }
+ public:
+ // Stop GCC warnings about the deprecated OnServerSplit event.
+ using ServerProtocol::LinkEventListener::OnServerSplit;
- virtual ~ModuleJoinFlood()
+ ModuleJoinFlood()
+ : ServerProtocol::LinkEventListener(this)
+ , jf(this)
+ , ignoreuntil(0)
{
}
-
- virtual Version GetVersion()
+
+ void ReadConfig(ConfigStatus&) CXX11_OVERRIDE
{
- return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
+ 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;
}
-};
+ void OnServerSplit(const Server* server, bool error) CXX11_OVERRIDE
+ {
+ if (splitwait)
+ ignoreuntil = ServerInstance->Time() + splitwait;
+ }
-class ModuleJoinFloodFactory : public ModuleFactory
-{
- public:
- ModuleJoinFloodFactory()
+ ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE
{
+ if (chan)
+ {
+ joinfloodsettings *f = jf.ext.get(chan);
+ if (f && f->islocked())
+ {
+ user->WriteNumeric(ERR_UNAVAILRESOURCE, chan->name, "This channel is temporarily unavailable (+j is set). Please try again later.");
+ return MOD_RES_DENY;
+ }
+ }
+ return MOD_RES_PASSTHRU;
}
-
- ~ModuleJoinFloodFactory()
+
+ void OnUserJoin(Membership* memb, bool sync, bool created, CUList& excepts) CXX11_OVERRIDE
{
+ /* We arent interested in JOIN events caused by a network burst */
+ if (sync || ignoreuntil > ServerInstance->Time())
+ return;
+
+ joinfloodsettings *f = jf.ext.get(memb->chan);
+
+ /* But all others are OK */
+ if ((f) && (!f->islocked()))
+ {
+ f->addjoin();
+ if (f->shouldlock())
+ {
+ f->clear();
+ f->lock();
+ 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));
+ }
+ }
}
-
- virtual Module * CreateModule(Server* Me)
+
+ Version GetVersion() CXX11_OVERRIDE
{
- return new ModuleJoinFlood(Me);
+ return Version("Adds channel mode j (joinflood) which helps protect against spammers which mass-join channels.", VF_VENDOR);
}
-
};
-
-extern "C" void * init_module( void )
-{
- return new ModuleJoinFloodFactory;
-}
-
+MODULE_INIT(ModuleJoinFlood)
projects / user / henk / code / inspircd.git / blobdiff