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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>
*/
#ifndef __IPPAIR_H__
#define __IPPAIR_H__
#include "decode.h"
#include "util-storage.h"
/** Spinlocks or Mutex for the flow buckets. */
//#define HRLOCK_SPIN
#define HRLOCK_MUTEX
#ifdef HRLOCK_SPIN
#ifdef HRLOCK_MUTEX
#error Cannot enable both HRLOCK_SPIN and HRLOCK_MUTEX
#endif
#endif
#ifdef HRLOCK_SPIN
#define HRLOCK_TYPE SCSpinlock
#define HRLOCK_INIT(fb) SCSpinInit(&(fb)->lock, 0)
#define HRLOCK_DESTROY(fb) SCSpinDestroy(&(fb)->lock)
#define HRLOCK_LOCK(fb) SCSpinLock(&(fb)->lock)
#define HRLOCK_TRYLOCK(fb) SCSpinTrylock(&(fb)->lock)
#define HRLOCK_UNLOCK(fb) SCSpinUnlock(&(fb)->lock)
#elif defined HRLOCK_MUTEX
#define HRLOCK_TYPE SCMutex
#define HRLOCK_INIT(fb) SCMutexInit(&(fb)->lock, NULL)
#define HRLOCK_DESTROY(fb) SCMutexDestroy(&(fb)->lock)
#define HRLOCK_LOCK(fb) SCMutexLock(&(fb)->lock)
#define HRLOCK_TRYLOCK(fb) SCMutexTrylock(&(fb)->lock)
#define HRLOCK_UNLOCK(fb) SCMutexUnlock(&(fb)->lock)
#else
#error Enable HRLOCK_SPIN or HRLOCK_MUTEX
#endif
typedef struct IPPair_ {
/** ippair mutex */
SCMutex m;
/** ippair addresses -- ipv4 or ipv6 */
Address a[2];
/** use cnt, reference counter */
SC_ATOMIC_DECLARE(unsigned int, use_cnt);
/** storage api handle */
Storage *storage;
/** hash pointers, protected by hash row mutex/spin */
struct IPPair_ *hnext;
struct IPPair_ *hprev;
/** list pointers, protected by ippair-queue mutex/spin */
struct IPPair_ *lnext;
struct IPPair_ *lprev;
} IPPair;
typedef struct IPPairHashRow_ {
HRLOCK_TYPE lock;
IPPair *head;
IPPair *tail;
} __attribute__((aligned(CLS))) IPPairHashRow;
/** ippair hash table */
IPPairHashRow *ippair_hash;
#define IPPAIR_VERBOSE 0
#define IPPAIR_QUIET 1
typedef struct IPPairConfig_ {
uint64_t memcap;
uint32_t hash_rand;
uint32_t hash_size;
uint32_t prealloc;
} IPPairConfig;
/** \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 IPPAIR_CHECK_MEMCAP(size) \
((((uint64_t)SC_ATOMIC_GET(ippair_memuse) + (uint64_t)(size)) <= ippair_config.memcap))
#define IPPairIncrUsecnt(h) \
(void)SC_ATOMIC_ADD((h)->use_cnt, 1)
#define IPPairDecrUsecnt(h) \
(void)SC_ATOMIC_SUB((h)->use_cnt, 1)
#define IPPairReference(dst_h_ptr, h) do { \
if ((h) != NULL) { \
IPPairIncrUsecnt((h)); \
*(dst_h_ptr) = h; \
} \
} while (0)
#define IPPairDeReference(src_h_ptr) do { \
if (*(src_h_ptr) != NULL) { \
IPPairDecrUsecnt(*(src_h_ptr)); \
*(src_h_ptr) = NULL; \
} \
} while (0)
IPPairConfig ippair_config;
SC_ATOMIC_DECLARE(unsigned long long int,ippair_memuse);
SC_ATOMIC_DECLARE(unsigned int,ippair_counter);
SC_ATOMIC_DECLARE(unsigned int,ippair_prune_idx);
void IPPairInitConfig(char quiet);
void IPPairShutdown(void);
void IPPairCleanup(void);
IPPair *IPPairLookupIPPairFromHash (Address *, Address *);
IPPair *IPPairGetIPPairFromHash (Address *, Address *);
void IPPairRelease(IPPair *);
void IPPairLock(IPPair *);
void IPPairClearMemory(IPPair *);
void IPPairMoveToSpare(IPPair *);
uint32_t IPPairSpareQueueGetSize(void);
void IPPairPrintStats (void);
void IPPairRegisterUnittests(void);
IPPair *IPPairAlloc(void);
void IPPairFree(IPPair *);
void IPPairLock(IPPair *);
void IPPairUnlock(IPPair *);
#endif /* __IPPAIR_H__ */
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