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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2009 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"
#include "xline.h"
/* $ModDesc: Throttles the connections of any users who try connect flood */
class ModuleConnectBan : public Module
{
private:
clonemap connects;
unsigned int threshold;
unsigned int banduration;
unsigned int ipv4_cidr;
unsigned int ipv6_cidr;
public:
ModuleConnectBan(InspIRCd* Me) : Module(Me)
{
Implementation eventlist[] = { I_OnUserConnect, I_OnGarbageCollect, I_OnRehash };
ServerInstance->Modules->Attach(eventlist, this, 3);
OnRehash(NULL);
}
virtual ~ModuleConnectBan()
{
}
virtual Version GetVersion()
{
return Version("$Id$", VF_VENDOR,API_VERSION);
}
virtual void OnRehash(User* user)
{
ConfigReader Conf(ServerInstance);
std::string duration;
ipv4_cidr = Conf.ReadInteger("connectban", "ipv4cidr", 0, true);
if (ipv4_cidr == 0)
ipv4_cidr = 32;
ipv6_cidr = Conf.ReadInteger("connectban", "ipv6cidr", 0, true);
if (ipv6_cidr == 0)
ipv6_cidr = 128;
threshold = Conf.ReadInteger("connectban", "threshold", 0, true);
if (threshold == 0)
threshold = 10;
duration = Conf.ReadValue("connectban", "duration", 0, true);
if (duration.empty())
duration = "10m";
banduration = ServerInstance->Duration(duration);
}
virtual void OnUserConnect(User *u)
{
int range = 32;
clonemap::iterator i;
switch (u->client_sa.sa.sa_family)
{
case AF_INET6:
range = ipv6_cidr;
break;
case AF_INET:
range = ipv4_cidr;
break;
}
i = connects.find(u->GetCIDRMask(range));
if (i != connects.end())
{
i->second++;
if (i->second >= threshold)
{
// Create zline for set duration.
ZLine* zl = new ZLine(ServerInstance, ServerInstance->Time(), banduration, ServerInstance->Config->ServerName, "Connect flooding", u->GetCIDRMask(range));
if (ServerInstance->XLines->AddLine(zl,NULL))
ServerInstance->XLines->ApplyLines();
else
delete zl;
ServerInstance->SNO->WriteToSnoMask('x', "Connect flooding from IP range %s (%d)", u->GetCIDRMask(range), threshold);
connects.erase(i);
}
}
else
{
connects[u->GetCIDRMask(range)] = 1;
}
}
virtual void OnGarbageCollect()
{
ServerInstance->Logs->Log("m_connectban",DEBUG, "Clearing map.");
connects.clear();
}
};
MODULE_INIT(ModuleConnectBan)
|
