2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
5 * Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
6 * Copyright (C) 2006 Craig Edwards <craigedwards@brainbox.cc>
8 * This file is part of InspIRCd. InspIRCd is free software: you can
9 * redistribute it and/or modify it under the terms of the GNU General Public
10 * License as published by the Free Software Foundation, version 2.
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 /* $ModDesc: Connection throttle */
26 class ModuleConnFlood : public Module
28 int seconds, timeout, boot_wait;
30 unsigned int maxconns;
37 : conns(0), throttled(false)
41 void init() CXX11_OVERRIDE
44 Implementation eventlist[] = { I_OnRehash, I_OnUserRegister };
45 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
48 Version GetVersion() CXX11_OVERRIDE
50 return Version("Connection throttle", VF_VENDOR);
55 /* read configuration variables */
56 ConfigTag* tag = ServerInstance->Config->ConfValue("connflood");
57 /* throttle configuration */
58 seconds = tag->getInt("seconds");
59 maxconns = tag->getInt("maxconns");
60 timeout = tag->getInt("timeout");
61 quitmsg = tag->getString("quitmsg");
63 /* seconds to wait when the server just booted */
64 boot_wait = tag->getInt("bootwait");
66 first = ServerInstance->Time();
69 ModResult OnUserRegister(LocalUser* user) CXX11_OVERRIDE
72 return MOD_RES_PASSTHRU;
74 time_t next = ServerInstance->Time();
76 if ((ServerInstance->startup_time + boot_wait) > next)
77 return MOD_RES_PASSTHRU;
79 /* time difference between first and latest connection */
80 time_t tdiff = next - first;
82 /* increase connection count */
87 if (tdiff > seconds + timeout)
91 ServerInstance->SNO->WriteGlobalSno('a', "Connection throttle deactivated");
92 return MOD_RES_PASSTHRU;
95 ServerInstance->Users->QuitUser(user, quitmsg);
101 if (conns >= maxconns)
104 ServerInstance->SNO->WriteGlobalSno('a', "Connection throttle activated");
105 ServerInstance->Users->QuitUser(user, quitmsg);
114 return MOD_RES_PASSTHRU;
117 void OnRehash(User* user) CXX11_OVERRIDE
124 MODULE_INIT(ModuleConnFlood)