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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2011 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
/* $ModDesc: Connection throttle */
int conns = 0, throttled = 0;
class ModuleConnFlood : public Module
{
private:
int seconds, maxconns, timeout, boot_wait;
time_t first;
std::string quitmsg;
public:
void init()
{
Implementation eventlist[] = { I_OnUserRegister };
ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
}
virtual ~ModuleConnFlood()
{
}
virtual Version GetVersion()
{
return Version("Connection throttle", VF_VENDOR);
}
void ReadConfig(ConfigReadStatus&)
{
ConfigTag* tag = ServerInstance->Config->GetTag("connflood");
/* read configuration variables */
/* throttle configuration */
seconds = tag->getInt("seconds");
maxconns = tag->getInt("maxconns");
timeout = tag->getInt("timeout");
quitmsg = tag->getString("quitmsg");
/* seconds to wait when the server just booted */
boot_wait = tag->getInt("bootwait");
first = ServerInstance->Time();
}
void OnUserRegister(LocalUser* user)
{
time_t next = ServerInstance->Time();
if ((ServerInstance->startup_time + boot_wait) > next)
return;
/* time difference between first and latest connection */
time_t tdiff = next - first;
/* increase connection count */
conns++;
if (throttled == 1)
{
if (tdiff > seconds + timeout)
{
/* expire throttle */
throttled = 0;
ServerInstance->SNO->WriteGlobalSno('a', "Connection throttle deactivated");
return;
}
ServerInstance->Users->QuitUser(user, quitmsg);
return;
}
if (tdiff <= seconds)
{
if (conns >= maxconns)
{
throttled = 1;
ServerInstance->SNO->WriteGlobalSno('a', "Connection throttle activated");
ServerInstance->Users->QuitUser(user, quitmsg);
}
}
else
{
conns = 1;
first = next;
}
}
};
MODULE_INIT(ModuleConnFlood)
|
