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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
* Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
*
* 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/>.
*/
#ifndef BANCACHE_H
#define BANCACHE_H
/** Stores a cached ban entry.
* Each ban has one of these hashed in a hash_map to make for faster removal
* of already-banned users in the case that they try to reconnect. As no wildcard
* matching is done on these IPs, the speed of the system is improved. These cache
* entries expire every few hours, which is a reasonable expiry for any reasonable
* sized network.
*/
class CoreExport BanCacheHit
{
public:
/** Type of cached ban
*/
std::string Type;
/** Reason, shown as quit message
*/
std::string Reason;
/** IP to match against, no wildcards here (of course)
*/
std::string IP;
/** Time that the ban expires at
*/
time_t Expiry;
BanCacheHit(const std::string &ip, const std::string &type, const std::string &reason, time_t seconds)
: Type(type), Reason(reason), IP(ip), Expiry(ServerInstance->Time() + seconds)
{
}
};
/* A container of ban cache items.
* must be defined after class BanCacheHit.
*/
typedef std::tr1::unordered_map<std::string, BanCacheHit*, std::tr1::hash<std::string> > BanCacheHash;
/** A manager for ban cache, which allocates and deallocates and checks cached bans.
*/
class CoreExport BanCacheManager
{
private:
BanCacheHash* BanHash;
public:
/** Creates and adds a Ban Cache item.
* @param ip The IP the item is for.
* @param type The type of ban cache item. std::string. .empty() means it's a negative match (user is allowed freely).
* @param reason The reason for the ban. Left .empty() if it's a negative match.
* @param seconds Number of seconds before nuking the bancache entry, the default is a day. This might seem long, but entries will be removed as glines/etc expire.
*/
BanCacheHit *AddHit(const std::string &ip, const std::string &type, const std::string &reason, time_t seconds = 0);
BanCacheHit *GetHit(const std::string &ip);
bool RemoveHit(BanCacheHit *b);
/** Removes all entries of a given type, either positive or negative. Returns the number of hits removed.
* @param type The type of bancache entries to remove (e.g. 'G')
* @param positive Remove either positive (true) or negative (false) hits.
*/
unsigned int RemoveEntries(const std::string &type, bool positive);
BanCacheManager()
{
this->BanHash = new BanCacheHash();
}
~BanCacheManager();
void RehashCache();
};
#endif
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