X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_joinflood.cpp;h=3241020bfb32aa358b1580c4c749176918c09769;hb=80e81e3b81b779901fd9d67f8ae030ee30c0bcec;hp=52802f168884fd2a1783b2b41b0cae08b984b001;hpb=3a3ff949670c61a4a8856e1391222e156eb1cd17;p=user%2Fhenk%2Fcode%2Finspircd.git

diff --git a/src/modules/m_joinflood.cpp b/src/modules/m_joinflood.cpp
index 52802f168..3241020bf 100644
--- a/src/modules/m_joinflood.cpp
+++ b/src/modules/m_joinflood.cpp
@@ -1,11 +1,13 @@
 /*
  * InspIRCd -- Internet Relay Chat Daemon
  *
+ *   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) 2007 Robin Burchell <robin+git@viroteck.net>
- *   Copyright (C) 2006-2007 Craig Edwards <craigedwards@brainbox.cc>
- *   Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
+ *   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
@@ -22,6 +24,16 @@
 
 
 #include "inspircd.h"
+#include "modules/server.h"
+
+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
  */
@@ -71,7 +83,7 @@ class joinfloodsettings
 
 	void lock()
 	{
-		unlocktime = ServerInstance->Time() + 60;
+		unlocktime = ServerInstance->Time() + duration;
 	}
 
 	bool operator==(const joinfloodsettings& other) const
@@ -88,23 +100,24 @@ class JoinFlood : public ParamMode<JoinFlood, SimpleExtItem<joinfloodsettings> >
 	JoinFlood(Module* Creator)
 		: ParamMode<JoinFlood, SimpleExtItem<joinfloodsettings> >(Creator, "joinflood", 'j')
 	{
+		syntax = "<joins>:<seconds>";
 	}
 
-	ModeAction OnSet(User* source, Channel* channel, std::string& parameter)
+	ModeAction OnSet(User* source, Channel* channel, std::string& parameter) CXX11_OVERRIDE
 	{
 		std::string::size_type colon = parameter.find(':');
 		if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos))
 		{
-			source->WriteNumeric(608, "%s :Invalid flood parameter",channel->name.c_str());
+			source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
 			return MODEACTION_DENY;
 		}
 
 		/* Set up the flood parameters for this channel */
-		unsigned int njoins = ConvToInt(parameter.substr(0, colon));
-		unsigned int nsecs = ConvToInt(parameter.substr(colon+1));
+		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))
 		{
-			source->WriteNumeric(608, "%s :Invalid flood parameter",channel->name.c_str());
+			source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
 			return MODEACTION_DENY;
 		}
 
@@ -119,14 +132,41 @@ class JoinFlood : public ParamMode<JoinFlood, SimpleExtItem<joinfloodsettings> >
 	}
 };
 
-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()
-		: jf(this)
+		: ServerProtocol::LinkEventListener(this)
+		, jf(this)
+		, ignoreuntil(0)
+	{
+	}
+
+	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;
+	}
+
+	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
@@ -136,7 +176,7 @@ class ModuleJoinFlood : public Module
 			joinfloodsettings *f = jf.ext.get(chan);
 			if (f && f->islocked())
 			{
-				user->WriteNumeric(609, "%s :This channel is temporarily unavailable (+j). Please try again later.",chan->name.c_str());
+				user->WriteNumeric(ERR_UNAVAILRESOURCE, chan->name, "This channel is temporarily unavailable (+j is set). Please try again later.");
 				return MOD_RES_DENY;
 			}
 		}
@@ -146,7 +186,7 @@ class ModuleJoinFlood : public Module
 	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)
+		if (sync || ignoreuntil > ServerInstance->Time())
 			return;
 
 		joinfloodsettings *f = jf.ext.get(memb->chan);
@@ -159,14 +199,14 @@ class ModuleJoinFlood : public Module
 			{
 				f->clear();
 				f->lock();
-				memb->chan->WriteChannelWithServ((char*)ServerInstance->Config->ServerName.c_str(), "NOTICE %s :This channel has been closed to new users for 60 seconds because there have been more than %d joins in %d seconds.", memb->chan->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));
 			}
 		}
 	}
 
 	Version GetVersion() CXX11_OVERRIDE
 	{
-		return Version("Provides channel mode +j (join flood protection)", VF_VENDOR);
+		return Version("Adds channel mode j (joinflood) which helps protect against spammers which mass-join channels.", VF_VENDOR);
 	}
 };