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/* Copyright (C) 2007-2012 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>
*/
#ifndef __FLOW_UTIL_H__
#define __FLOW_UTIL_H__
#include "detect-engine-state.h"
#include "tmqh-flow.h"
#define COPY_TIMESTAMP(src,dst) ((dst)->tv_sec = (src)->tv_sec, (dst)->tv_usec = (src)->tv_usec)
#define RESET_COUNTERS(f) do { \
(f)->todstpktcnt = 0; \
(f)->tosrcpktcnt = 0; \
(f)->todstbytecnt = 0; \
(f)->tosrcbytecnt = 0; \
} while (0)
#define FLOW_INITIALIZE(f) do { \
(f)->sp = 0; \
(f)->dp = 0; \
(f)->proto = 0; \
SC_ATOMIC_INIT((f)->flow_state); \
SC_ATOMIC_INIT((f)->use_cnt); \
(f)->tenant_id = 0; \
(f)->probing_parser_toserver_alproto_masks = 0; \
(f)->probing_parser_toclient_alproto_masks = 0; \
(f)->flags = 0; \
(f)->lastts.tv_sec = 0; \
(f)->lastts.tv_usec = 0; \
FLOWLOCK_INIT((f)); \
(f)->protoctx = NULL; \
(f)->flow_end_flags = 0; \
(f)->alproto = 0; \
(f)->alproto_ts = 0; \
(f)->alproto_tc = 0; \
(f)->data_al_so_far[0] = 0; \
(f)->data_al_so_far[1] = 0; \
(f)->de_ctx_id = 0; \
(f)->thread_id = 0; \
(f)->detect_alversion[0] = 0; \
(f)->detect_alversion[1] = 0; \
(f)->alparser = NULL; \
(f)->alstate = NULL; \
(f)->de_state = NULL; \
(f)->sgh_toserver = NULL; \
(f)->sgh_toclient = NULL; \
(f)->flowvar = NULL; \
(f)->hnext = NULL; \
(f)->hprev = NULL; \
(f)->lnext = NULL; \
(f)->lprev = NULL; \
SC_ATOMIC_INIT((f)->autofp_tmqh_flow_qid); \
(void) SC_ATOMIC_SET((f)->autofp_tmqh_flow_qid, -1); \
RESET_COUNTERS((f)); \
} while (0)
/** \brief macro to recycle a flow before it goes into the spare queue for reuse.
*
* Note that the lnext, lprev, hnext, hprev fields are untouched, those are
* managed by the queueing code. Same goes for fb (FlowBucket ptr) field.
*/
#define FLOW_RECYCLE(f) do { \
FlowCleanupAppLayer((f)); \
(f)->sp = 0; \
(f)->dp = 0; \
(f)->proto = 0; \
SC_ATOMIC_RESET((f)->flow_state); \
SC_ATOMIC_RESET((f)->use_cnt); \
(f)->tenant_id = 0; \
(f)->probing_parser_toserver_alproto_masks = 0; \
(f)->probing_parser_toclient_alproto_masks = 0; \
(f)->flags = 0; \
(f)->lastts.tv_sec = 0; \
(f)->lastts.tv_usec = 0; \
(f)->protoctx = NULL; \
(f)->flow_end_flags = 0; \
(f)->alparser = NULL; \
(f)->alstate = NULL; \
(f)->alproto = 0; \
(f)->alproto_ts = 0; \
(f)->alproto_tc = 0; \
(f)->data_al_so_far[0] = 0; \
(f)->data_al_so_far[1] = 0; \
(f)->de_ctx_id = 0; \
(f)->thread_id = 0; \
(f)->detect_alversion[0] = 0; \
(f)->detect_alversion[1] = 0; \
if ((f)->de_state != NULL) { \
DetectEngineStateReset((f)->de_state, (STREAM_TOSERVER | STREAM_TOCLIENT)); \
} \
(f)->sgh_toserver = NULL; \
(f)->sgh_toclient = NULL; \
GenericVarFree((f)->flowvar); \
(f)->flowvar = NULL; \
if (SC_ATOMIC_GET((f)->autofp_tmqh_flow_qid) != -1) { \
(void) SC_ATOMIC_SET((f)->autofp_tmqh_flow_qid, -1); \
} \
RESET_COUNTERS((f)); \
} while(0)
#define FLOW_DESTROY(f) do { \
FlowCleanupAppLayer((f)); \
SC_ATOMIC_DESTROY((f)->flow_state); \
SC_ATOMIC_DESTROY((f)->use_cnt); \
\
FLOWLOCK_DESTROY((f)); \
if ((f)->de_state != NULL) { \
DetectEngineStateFlowFree((f)->de_state); \
} \
GenericVarFree((f)->flowvar); \
SC_ATOMIC_DESTROY((f)->autofp_tmqh_flow_qid); \
} while(0)
/** \brief check if a memory alloc would fit in the memcap
*
* \param size memory allocation size to check
*
* \retval 1 it fits
* \retval 0 no fit
*/
#define FLOW_CHECK_MEMCAP(size) \
((((uint64_t)SC_ATOMIC_GET(flow_memuse) + (uint64_t)(size)) <= flow_config.memcap))
Flow *FlowAlloc(void);
Flow *FlowAllocDirect(void);
void FlowFree(Flow *);
uint8_t FlowGetProtoMapping(uint8_t);
void FlowInit(Flow *, const Packet *);
uint8_t FlowGetReverseProtoMapping(uint8_t rproto);
#endif /* __FLOW_UTIL_H__ */
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