src/bancache.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *          the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $Core: libIRCDbancache */
  15
  16 #include "inspircd.h"
  17 #include "bancache.h"
  18
  19 BanCacheHit *BanCacheManager::AddHit(const std::string &ip, const std::string &type, const std::string &reason)
  20 {
  21         BanCacheHit *b;
  22
  23         if (this->BanHash->find(ip) != this->BanHash->end()) // can't have two cache entries on the same IP, sorry..
  24                 return NULL;
  25
  26         b = new BanCacheHit(ServerInstance, ip, type, reason);
  27
  28         this->BanHash->insert(std::make_pair(ip, b));
  29         return b;
  30 }
  31
  32 BanCacheHit *BanCacheManager::AddHit(const std::string &ip, const std::string &type, const std::string &reason, time_t seconds)
  33 {
  34         BanCacheHit *b;
  35
  36         if (this->BanHash->find(ip) != this->BanHash->end()) // can't have two cache entries on the same IP, sorry..
  37                 return NULL;
  38
  39         b = new BanCacheHit(ServerInstance, ip, type, reason, seconds);
  40
  41         this->BanHash->insert(std::make_pair(ip, b));
  42         return b;
  43 }
  44
  45 BanCacheHit *BanCacheManager::GetHit(const std::string &ip)
  46 {
  47         BanCacheHash::iterator i = this->BanHash->find(ip);
  48
  49         if (i == this->BanHash->end())
  50                 return NULL; // free and safe
  51         else
  52         {
  53                 if (time(NULL) > i->second->Expiry)
  54                 {
  55                         ServerInstance->Logs->Log("BANCACHE", DEBUG, "Hit on " + ip + " is out of date, removing!");
  56                         RemoveHit(i->second);
  57                         return NULL; // out of date
  58                 }
  59
  60                 return i->second; // hit.
  61         }
  62 }
  63
  64 bool BanCacheManager::RemoveHit(BanCacheHit *b)
  65 {
  66         BanCacheHash::iterator i;
  67
  68         if (!b)
  69                 return false; // I don't think so.
  70
  71         i = this->BanHash->find(b->IP);
  72
  73         if (i == this->BanHash->end())
  74         {
  75                 // err..
  76                 ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCacheManager::RemoveHit(): I got asked to remove a hit that wasn't in the hash(?)");
  77         }
  78         else
  79         {
  80                 this->BanHash->erase(i);
  81         }
  82
  83         delete b;
  84         return true;
  85 }
  86
  87 unsigned int BanCacheManager::RemoveEntries(const std::string &type, bool positive)
  88 {
  89         int removed = 0;
  90
  91         BanCacheHash::iterator safei;
  92
  93         if (positive)
  94                 ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCacheManager::RemoveEntries(): Removing positive hits for " + type);
  95         else
  96                 ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCacheManager::RemoveEntries(): Removing negative hits for " + type);
  97
  98         for (BanCacheHash::iterator n = BanHash->begin(); n != BanHash->end(); )
  99         {
 100                 safei = n;
 101                 safei++;
 102
 103                 BanCacheHit *b = n->second;
 104
 105                 /* Safe to delete items here through iterator 'n' */
 106                 if (b->Type == type || !positive) // if removing negative hits, ignore type..
 107                 {
 108                         if ((positive && !b->Reason.empty()) || b->Reason.empty())
 109                         {
 110                                 /* we need to remove this one. */
 111                                 ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCacheManager::RemoveEntries(): Removing a hit on " + b->IP);
 112                                 delete b;
 113                                 b = NULL;
 114                                 BanHash->erase(n); // WORD TO THE WISE: don't use RemoveHit here, because we MUST remove the iterator in a safe way.
 115                                 removed++;
 116                         }
 117                 }
 118
 119                 /* End of safe section */
 120                 n = safei;
 121         }
 122
 123
 124         return removed;
 125 }
 126
 127 void BanCacheManager::RehashCache()
 128 {
 129         BanCacheHash* NewHash = new BanCacheHash();
 130
 131         BanCacheHash::iterator safei;
 132         for (BanCacheHash::iterator n = BanHash->begin(); n != BanHash->end(); )
 133         {
 134                 safei = n;
 135                 safei++;
 136
 137                 /* Safe to delete items here through iterator 'n' */
 138                 BanCacheHit *b = n->second;
 139
 140                 if (time(NULL) > b->Expiry)
 141                 {
 142                         /* we need to remove this one. */
 143                         delete b;
 144                         b = NULL;
 145                         BanHash->erase(n); // WORD TO THE WISE: don't use RemoveHit here, because we MUST remove the iterator in a safe way.
 146                 }
 147                 else
 148                 {
 149                         /* Actually inserts a std::pair */
 150                         NewHash->insert(*n);
 151                 }
 152
 153                 /* End of safe section */
 154
 155                 n = safei;
 156         }
 157
 158         delete BanHash;
 159         BanHash = NewHash;
 160 }