int CleanHashTable(SFXHASH *table, u_int32_t thetime, Session *save_me, int memCheck)
{
Session *idx;
u_int32_t pruned = 0;
u_int32_t timeout = s4data.timeout;
if (thetime != 0)
{
char got_one;
idx = (Session *) sfxhash_lru(table);
if(idx == NULL)
{
return 0;
}
do
{
got_one = 0;
if(idx == save_me)
{
SFXHASH_NODE *lastNode = sfxhash_lru_node(table);
sfxhash_gmovetofront(table, lastNode);
lastNode = sfxhash_lru_node(table);
if ((lastNode) && (lastNode->data != idx))
{
idx = (Session *)lastNode->data;
continue;
}
else
{
return pruned;
}
}
timeout = s4data.timeout;
if(idx->drop_traffic)
{
/* If we're dropping traffic on the session, keep
* it around longer. */
timeout = s4data.timeout * 2;
}
if((idx->last_session_time+timeout) < thetime)
{
Session *savidx = idx;
if(sfxhash_count(table) > 1)
{
DEBUG_WRAP(DebugMessage(DEBUG_STREAM, "pruning stale session\n"););
DeleteSession(savidx, thetime, SESSION_CLOSED_TIMEDOUT);
idx = (Session *) sfxhash_lru(table);
pruned++;
got_one = 1;
}
int PruneLWSessionCache(Stream5SessionCache *sessionCache,
uint32_t thetime,
Stream5LWSession *save_me,
int memCheck)
{
Stream5LWSession *idx;
uint32_t pruned = 0;
if (thetime != 0)
{
/* Pruning, look for sessions that have time'd out */
char got_one;
idx = (Stream5LWSession *) sfxhash_lru(sessionCache->hashTable);
if(idx == NULL)
{
return 0;
}
do
{
got_one = 0;
if(idx == save_me)
{
SFXHASH_NODE *lastNode = sfxhash_lru_node(sessionCache->hashTable);
sfxhash_gmovetofront(sessionCache->hashTable, lastNode);
lastNode = sfxhash_lru_node(sessionCache->hashTable);
if ((lastNode) && (lastNode->data != idx))
{
idx = (Stream5LWSession *)lastNode->data;
continue;
}
else
{
sessionCache->prunes += pruned;
return pruned;
}
}
if((idx->last_data_seen+sessionCache->timeout) < thetime)
{
Stream5LWSession *savidx = idx;
if(sfxhash_count(sessionCache->hashTable) > 1)
{
DEBUG_WRAP(DebugMessage(DEBUG_STREAM, "pruning stale session\n"););
savidx->session_flags |= SSNFLAG_TIMEDOUT;
DeleteLWSession(sessionCache, savidx, "stale/timeout");
idx = (Stream5LWSession *) sfxhash_lru(sessionCache->hashTable);
pruned++;
got_one = 1;
}
/*
* move a node to the front of the row list at row = 'index'
*/
static void movetofront( SFXHASH *t, SFXHASH_NODE * n )
{
/* Modify Hash Node Row List */
if( t->table[n->rindex] != n ) // if not at front of list already...
{
/* Unlink the node */
sfxhash_unlink_node( t, n );
/* Link at front of list */
sfxhash_link_node( t, n );
}
/* Move node in the global hash node list to the front */
sfxhash_gmovetofront( t, n );
}
