-/* +------------------------------------+
- * | 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, 2016-2019 Sadie Powell <sadie@witchery.services>
+ * Copyright (C) 2012, 2019 Robby <robby@chatbelgie.be>
+ * Copyright (C) 2012, 2014 Attila Molnar <attilamolnar@hush.com>
+ * Copyright (C) 2010 Craig Edwards <brain@inspircd.org>
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2007-2009 Robin Burchell <robin+git@viroteck.net>
*
- * 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 <http://www.gnu.org/licenses/>.
*/
+
#include "inspircd.h"
+#include "modules/exemption.h"
-/* $ModDesc: Provides channel mode +F (nick flood protection) */
+// The number of seconds nickname changing will be blocked for.
+static unsigned int duration;
/** Holds settings and state associated with channel mode +F
*/
-class nickfloodsettings : public classbase
+class nickfloodsettings
{
public:
- int secs;
- int nicks;
+ unsigned int secs;
+ unsigned int nicks;
time_t reset;
time_t unlocktime;
- int counter;
- bool locked;
+ unsigned int counter;
- nickfloodsettings(int b, int c) : secs(b), nicks(c)
+ nickfloodsettings(unsigned int b, unsigned int c)
+ : secs(b), nicks(c), unlocktime(0), counter(0)
{
reset = ServerInstance->Time() + secs;
- counter = 0;
- locked = false;
- };
+ }
void addnick()
{
- counter++;
if (ServerInstance->Time() > reset)
{
- counter = 0;
+ counter = 1;
reset = ServerInstance->Time() + secs;
}
+ else
+ counter++;
}
bool shouldlock()
{
- /* XXX HACK: using counter + 1 here now to allow the counter to only be incremented
- * on successful nick changes; this will be checked before the counter is
- * incremented.
- */
- return (counter + 1 >= this->nicks);
+ return ((ServerInstance->Time() <= reset) && (counter == this->nicks));
}
void clear()
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;
}
-
};
-/** Handles channel mode +j
+/** Handles channel mode +F
*/
-class NickFlood : public ModeHandler
+class NickFlood : public ParamMode<NickFlood, SimpleExtItem<nickfloodsettings> >
{
public:
- SimpleExtItem<nickfloodsettings> ext;
- NickFlood(Module* Creator) : ModeHandler(Creator, 'F', PARAM_SETONLY, MODETYPE_CHANNEL),
- ext("nickflood", Creator) { }
-
- ModePair ModeSet(User* source, User* dest, Channel* channel, const std::string ¶meter)
+ NickFlood(Module* Creator)
+ : ParamMode<NickFlood, SimpleExtItem<nickfloodsettings> >(Creator, "nickflood", 'F')
{
- nickfloodsettings* x = ext.get(channel);
- if (x)
- return std::make_pair(true, ConvToStr(x->nicks)+":"+ConvToStr(x->secs));
- else
- return std::make_pair(false, parameter);
+ syntax = "<nick-changes>:<seconds>";
}
- ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
+ ModeAction OnSet(User* source, Channel* channel, std::string& parameter) CXX11_OVERRIDE
{
- nickfloodsettings *f = ext.get(channel);
- 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* nicks = 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 nnicks = atoi(nicks);
- int nsecs = atoi(secs);
- if ((nnicks<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 (!f)
- {
- parameter = ConvToStr(nnicks) + ":" +ConvToStr(nsecs);
- f = new nickfloodsettings(nsecs, nnicks);
- ext.set(channel, f);
- channel->SetModeParam('F', parameter);
- return MODEACTION_ALLOW;
- }
- else
- {
- std::string cur_param = channel->GetModeParameter('F');
- parameter = ConvToStr(nnicks) + ":" +ConvToStr(nsecs);
- if (cur_param == parameter)
- {
- // mode params match
- return MODEACTION_DENY;
- }
- else
- {
- // new mode param, replace old with new
- if ((nsecs > 0) && (nnicks > 0))
- {
- f = new nickfloodsettings(nsecs, nnicks);
- ext.set(channel, f);
- channel->SetModeParam('F', 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 nnicks = ConvToNum<unsigned int>(parameter.substr(0, colon));
+ unsigned int nsecs = ConvToNum<unsigned int>(parameter.substr(colon+1));
+
+ if ((nnicks<1) || (nsecs<1))
{
- if (f)
- {
- ext.unset(channel);
- channel->SetModeParam('F', "");
- return MODEACTION_ALLOW;
- }
+ source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
+ return MODEACTION_DENY;
}
- return MODEACTION_DENY;
+
+ ext.set(channel, new nickfloodsettings(nsecs, nnicks));
+ return MODEACTION_ALLOW;
+ }
+
+ void SerializeParam(Channel* chan, const nickfloodsettings* nfs, std::string& out)
+ {
+ out.append(ConvToStr(nfs->nicks)).push_back(':');
+ out.append(ConvToStr(nfs->secs));
}
};
class ModuleNickFlood : public Module
{
+ CheckExemption::EventProvider exemptionprov;
NickFlood nf;
public:
-
ModuleNickFlood()
- : nf(this)
+ : exemptionprov(this)
+ , nf(this)
{
- if (!ServerInstance->Modes->AddMode(&nf))
- throw ModuleException("Could not add new modes!");
- Extensible::Register(&nf.ext);
- Implementation eventlist[] = { I_OnUserPreNick, I_OnUserPostNick };
- ServerInstance->Modules->Attach(eventlist, this, 2);
}
- ModResult OnUserPreNick(User* user, const std::string &newnick)
+ void ReadConfig(ConfigStatus&) CXX11_OVERRIDE
{
- if (isdigit(newnick[0])) /* allow switches to UID */
- return MOD_RES_PASSTHRU;
+ ConfigTag* tag = ServerInstance->Config->ConfValue("nickflood");
+ duration = tag->getDuration("duration", 60, 10, 600);
+ }
- for (UCListIter i = user->chans.begin(); i != user->chans.end(); i++)
+ ModResult OnUserPreNick(LocalUser* user, const std::string& newnick) CXX11_OVERRIDE
+ {
+ for (User::ChanList::iterator i = user->chans.begin(); i != user->chans.end(); i++)
{
- Channel *channel = *i;
+ Channel* channel = (*i)->chan;
+ ModResult res;
nickfloodsettings *f = nf.ext.get(channel);
if (f)
{
- if (CHANOPS_EXEMPT('F') && channel->GetPrefixValue(user) == OP_VALUE)
+ res = CheckExemption::Call(exemptionprov, user, channel, "nickflood");
+ if (res == MOD_RES_ALLOW)
continue;
if (f->islocked())
{
- user->WriteNumeric(447, "%s :%s has been locked for nickchanges for 60 seconds because there have been more than %d nick changes in %d seconds", user->nick.c_str(), channel->name.c_str(), f->nicks, f->secs);
+ user->WriteNumeric(ERR_CANTCHANGENICK, InspIRCd::Format("%s has been locked for nickchanges for %u seconds because there have been more than %u nick changes in %u seconds", channel->name.c_str(), duration, f->nicks, f->secs));
return MOD_RES_DENY;
}
{
f->clear();
f->lock();
- channel->WriteChannelWithServ((char*)ServerInstance->Config->ServerName.c_str(), "NOTICE %s :No nick changes are allowed for 60 seconds because there have been more than %d nick changes in %d seconds.", channel->name.c_str(), f->nicks, f->secs);
+ channel->WriteNotice(InspIRCd::Format("No nick changes are allowed for %u seconds because there have been more than %u nick changes in %u seconds.", duration, f->nicks, f->secs));
return MOD_RES_DENY;
}
}
/*
* XXX: HACK: We do the increment on the *POST* event here (instead of all together) because we have no way of knowing whether other modules would block a nickchange.
*/
- void OnUserPostNick(User* user, const std::string &oldnick)
+ void OnUserPostNick(User* user, const std::string &oldnick) CXX11_OVERRIDE
{
if (isdigit(user->nick[0])) /* allow switches to UID */
return;
- for (UCListIter i = user->chans.begin(); i != user->chans.end(); ++i)
+ for (User::ChanList::iterator i = user->chans.begin(); i != user->chans.end(); ++i)
{
- Channel *channel = *i;
+ Channel* channel = (*i)->chan;
+ ModResult res;
nickfloodsettings *f = nf.ext.get(channel);
if (f)
{
- if (CHANOPS_EXEMPT('F') && channel->GetPrefixValue(user) == OP_VALUE)
+ res = CheckExemption::Call(exemptionprov, user, channel, "nickflood");
+ if (res == MOD_RES_ALLOW)
return;
-
+
/* moved this here to avoid incrementing the counter for nick
* changes that are denied for some other reason (bans, +N, etc.)
* per bug #874.
f->addnick();
}
}
- return;
- }
-
- ~ModuleNickFlood()
- {
- ServerInstance->Modes->DelMode(&nf);
}
- Version GetVersion()
+ Version GetVersion() CXX11_OVERRIDE
{
- return Version("Channel mode F - nick flood protection", VF_COMMON | VF_VENDOR);
+ return Version("Adds channel mode F (nickflood) which helps protect against spammers which mass-change nicknames.", VF_VENDOR);
}
};
projects / user / henk / code / inspircd.git / blobdiff