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/* Copyright (C) 2007-2013 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* 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
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Victor Julien <victor@inliniac.net>
*
* Simple queue handler
*/
#include "suricata.h"
#include "packet-queue.h"
#include "decode.h"
#include "threads.h"
#include "threadvars.h"
#include "tm-queuehandlers.h"
Packet *TmqhInputSimple(ThreadVars *t);
void TmqhOutputSimple(ThreadVars *t, Packet *p);
void TmqhInputSimpleShutdownHandler(ThreadVars *);
void TmqhSimpleRegister (void)
{
tmqh_table[TMQH_SIMPLE].name = "simple";
tmqh_table[TMQH_SIMPLE].InHandler = TmqhInputSimple;
tmqh_table[TMQH_SIMPLE].InShutdownHandler = TmqhInputSimpleShutdownHandler;
tmqh_table[TMQH_SIMPLE].OutHandler = TmqhOutputSimple;
}
Packet *TmqhInputSimple(ThreadVars *t)
{
PacketQueue *q = &trans_q[t->inq->id];
StatsSyncCountersIfSignalled(t);
SCMutexLock(&q->mutex_q);
if (q->len == 0) {
/* if we have no packets in queue, wait... */
SCCondWait(&q->cond_q, &q->mutex_q);
}
if (q->len > 0) {
Packet *p = PacketDequeue(q);
SCMutexUnlock(&q->mutex_q);
return p;
} else {
/* return NULL if we have no pkt. Should only happen on signals. */
SCMutexUnlock(&q->mutex_q);
return NULL;
}
}
void TmqhInputSimpleShutdownHandler(ThreadVars *tv)
{
int i;
if (tv == NULL || tv->inq == NULL) {
return;
}
for (i = 0; i < (tv->inq->reader_cnt + tv->inq->writer_cnt); i++)
SCCondSignal(&trans_q[tv->inq->id].cond_q);
}
void TmqhOutputSimple(ThreadVars *t, Packet *p)
{
SCLogDebug("Packet %p, p->root %p, alloced %s", p, p->root, p->flags & PKT_ALLOC ? "true":"false");
PacketQueue *q = &trans_q[t->outq->id];
SCMutexLock(&q->mutex_q);
PacketEnqueue(q, p);
SCCondSignal(&q->cond_q);
SCMutexUnlock(&q->mutex_q);
}
/*******************************Generic-Q-Handlers*****************************/
/**
* \brief Public version of TmqhInputSimple from the tmqh-simple queue
* handler, except that it is a generic version that is directly
* tied to a "SCDQDataQueue" instance(sent as an arg).
*
* Retrieves a data_instance from the queue. If the queue is empty, it
* waits on the queue, till a data_instance is enqueued into the queue
* by some other module.
*
* All references to "data_instance" means a reference to a data structure
* instance that implements the template "struct SCDQGenericQData_".
*
* \param q The SCDQDataQueue instance to wait on.
*
* \retval p The returned packet from the queue.
* \retval data The returned data_instance from the queue.
*/
SCDQGenericQData *TmqhInputSimpleOnQ(SCDQDataQueue *q)
{
SCMutexLock(&q->mutex_q);
if (q->len == 0) {
/* if we have no packets in queue, wait... */
SCCondWait(&q->cond_q, &q->mutex_q);
}
if (q->len > 0) {
SCDQGenericQData *data = SCDQDataDequeue(q);
SCMutexUnlock(&q->mutex_q);
return data;
} else {
/* return NULL if we have no data in the queue. Should only happen
* on signals. */
SCMutexUnlock(&q->mutex_q);
return NULL;
}
}
/**
* \brief Public version of TmqhOutputSimple from the tmqh-simple queue
* handler, except that it is a generic version that is directly
* tied to a SCDQDataQueue instance(sent as an arg).
*
* Pumps out a data_instance into the queue. If the queue is empty, it
* waits on the queue, till a data_instance is enqueued into the queue.
*
* All references to "data_instance" means a reference to a data structure
* instance that implements the template "struct SCDQGenericQData_".
*
* \param q The SCDQDataQueue instance to pump the data into.
* \param data The data instance to be enqueued.
*/
void TmqhOutputSimpleOnQ(SCDQDataQueue *q, SCDQGenericQData *data)
{
SCMutexLock(&q->mutex_q);
SCDQDataEnqueue(q, data);
SCCondSignal(&q->cond_q);
SCMutexUnlock(&q->mutex_q);
return;
}
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