1 /* +------------------------------------+
\r * | Inspire Internet Relay Chat Daemon |
\r * +------------------------------------+
\r *
\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team
\r * See: http://www.inspircd.org/wiki/index.php/Credits
\r *
\r * This program is free but copyrighted software; see
\r * the file COPYING for details.
\r *
\r * ---------------------------------------------------
\r */
\r\r#include "inspircd.h"
\r#include "users.h"
\r#include "modules.h"
\r\r/* $ModDesc: Connection throttle */
\r\rint conns = 0, throttled = 0;
\r\rclass ModuleConnFlood : public Module
\r{
\rprivate:
\r int seconds, maxconns, timeout, boot_wait;
\r time_t first;
\r std::string quitmsg;
\r\r ConfigReader* conf;
\r \r\rpublic:
\r ModuleConnFlood(InspIRCd* Me) : Module(Me)
\r {
\r \r InitConf();
\r }
\r\r virtual ~ModuleConnFlood()
\r {
\r }
\r\r virtual Version GetVersion()
\r {
\r return Version(1,1,0,0,VF_VENDOR,API_VERSION);
\r }
\r\r void Implements(char* List)
\r {
\r List[I_OnRehash] = List[I_OnUserRegister] = 1;
\r }
\r \r void InitConf()
\r {
\r /* read configuration variables */
\r conf = new ConfigReader(ServerInstance);
\r /* throttle configuration */
\r seconds = conf->ReadInteger("connflood", "seconds", 0, true);
\r maxconns = conf->ReadInteger("connflood", "maxconns", 0, true);
\r timeout = conf->ReadInteger("connflood", "timeout", 0, true);
\r quitmsg = conf->ReadValue("connflood", "quitmsg", 0);
\r\r /* seconds to wait when the server just booted */
\r boot_wait = conf->ReadInteger("connflood", "bootwait", 0, true);
\r\r first = ServerInstance->Time();
\r }
\r \r virtual int OnUserRegister(userrec* user)
\r {
\r time_t next = ServerInstance->Time();
\r \r if ((ServerInstance->startup_time + boot_wait) > next)
\r return 0;
\r \r /* time difference between first and latest connection */
\r time_t tdiff = next - first;
\r\r /* increase connection count */
\r conns++;
\r\r if (throttled == 1)
\r {
\r if (tdiff > seconds + timeout)
\r {
\r /* expire throttle */
\r throttled = 0;
\r ServerInstance->WriteOpers("*** Connection throttle deactivated");
\r return 0;
\r }
\r userrec::QuitUser(ServerInstance, user, quitmsg);
\r return 1;
\r }
\r\r if (tdiff <= seconds)
\r {
\r if (conns >= maxconns)
\r {
\r throttled = 1;
\r ServerInstance->WriteOpers("*** Connection throttle activated");
\r userrec::QuitUser(ServerInstance, user, quitmsg);
\r return 1;
\r }
\r }
\r else
\r {
\r conns = 1;
\r first = next;
\r }
\r return 0;
\r }
\r\r virtual void OnRehash(userrec* user, const std::string ¶meter)
\r {
\r InitConf();
\r }
\r\r};
\r\rMODULE_INIT(ModuleConnFlood)
\r
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