/**
* returns entry in hashtable for the given connection
* if it was not found, a new entry is created and returned
*/
TRWPortscanDetector::TRWEntry* TRWPortscanDetector::getEntry(Connection* conn)
{
time_t curtime = time(0);
uint32_t hash = crc32(0, 2, &reinterpret_cast<char*>(&conn->srcIP)[2]) & (hashSize-1);
// regularly cleanup expired entries in hashtable
if (lastCleanup+timeCleanupInterval < (uint32_t)curtime) {
cleanupEntries();
lastCleanup = curtime;
}
list<TRWEntry*>::iterator iter = trwEntries[hash].begin();
while (iter != trwEntries[hash].end()) {
if ((*iter)->srcIP == conn->srcIP) {
// found the entry
return *iter;
}
iter++;
}
// no entry found, create a new one
TRWEntry* trw = createEntry(conn);
trwEntries[hash].push_back(trw);
return trw;
}
/**
* returns entry in hashtable for the given connection
* if it was not found, a new entry is created and returned
*/
RBSWormDetector::RBSEntry* RBSWormDetector::getEntry(Connection* conn)
{
time_t curtime = time(0);
uint32_t hash = crc32(0, 4, reinterpret_cast<char*>(&conn->srcIP)) & (hashSize-1);
//regularly adapt new values
if (lastAdaption+timeAdaptInterval < (uint32_t) curtime)
{
lastAdaption = curtime;
adaptFrequencies();
}
// regularly cleanup expired entries in hashtable
if (lastCleanup+timeCleanupInterval < (uint32_t)curtime) {
lastCleanup = curtime;
cleanupEntries();
}
list<RBSEntry*>::iterator iter = rbsEntries[hash].begin();
while (iter != rbsEntries[hash].end()) {
if ((*iter)->srcIP == conn->srcIP) {
// found the entry
return *iter;
}
iter++;
}
// no entry found, create a new one
RBSEntry* rbs = createEntry(conn);
rbsEntries[hash].push_back(rbs);
return rbs;
}
