defrag-hash.c File Reference

#include "suricata-common.h"
#include "conf.h"
#include "defrag-hash.h"
#include "defrag-queue.h"
#include "defrag-config.h"
#include "util-random.h"
#include "util-byte.h"
#include "util-misc.h"
#include "util-hash-lookup3.h"

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Data Structures
struct	DefragHashKey4_
struct	DefragHashKey6_

Macros
#define	DefragTrackerIncrUsecnt(dt)   SC_ATOMIC_ADD((dt)->use_cnt, 1)
#define	DefragTrackerDecrUsecnt(dt)   SC_ATOMIC_SUB((dt)->use_cnt, 1)
#define	DEFRAG_DEFAULT_HASHSIZE   4096
#define	DEFRAG_DEFAULT_MEMCAP   16777216
#define	DEFRAG_DEFAULT_PREALLOC   1000
#define	CMP_DEFRAGTRACKER(d1, d2, id)

Typedefs
typedef struct DefragHashKey4_	DefragHashKey4
typedef struct DefragHashKey6_	DefragHashKey6

Functions
int	DefragTrackerSetMemcap (uint64_t size)
	Update memcap value. More...
uint64_t	DefragTrackerGetMemcap (void)
	Return memcap value. More...
uint64_t	DefragTrackerGetMemuse (void)
	Return memuse value. More...
uint32_t	DefragTrackerSpareQueueGetSize (void)
void	DefragTrackerMoveToSpare (DefragTracker *h)
void	DefragTrackerRelease (DefragTracker *t)
void	DefragTrackerClearMemory (DefragTracker *dt)
void	DefragInitConfig (char quiet)
	initialize the configuration More...
void	DefragHashShutdown (void)
	shutdown the flow engine More...
DefragTracker *	DefragGetTrackerFromHash (Packet *p)
DefragTracker *	DefragLookupTrackerFromHash (Packet *p)
	look up a tracker in the hash More...

Macro Definition Documentation

#define CMP_DEFRAGTRACKER	(		d1,
			d2,
			id
	)

Value:

(((CMP_ADDR(&(d1)->src_addr, &(d2)->src) && \
       CMP_ADDR(&(d1)->dst_addr, &(d2)->dst)) || \
      (CMP_ADDR(&(d1)->src_addr, &(d2)->dst) && \
       CMP_ADDR(&(d1)->dst_addr, &(d2)->src))) && \
     (d1)->proto == IP_GET_IPPROTO(d2) &&   \
     (d1)->id == (id) && \
     (d1)->vlan_id[0] == (d2)->vlan_id[0] && \
     (d1)->vlan_id[1] == (d2)->vlan_id[1])

Definition at line 443 of file defrag-hash.c.

#define DEFRAG_DEFAULT_HASHSIZE   4096

Definition at line 155 of file defrag-hash.c.

Referenced by DefragInitConfig().

#define DEFRAG_DEFAULT_MEMCAP   16777216

Definition at line 156 of file defrag-hash.c.

Referenced by DefragInitConfig().

#define DEFRAG_DEFAULT_PREALLOC   1000

Definition at line 157 of file defrag-hash.c.

Referenced by DefragInitConfig().

#define DefragTrackerDecrUsecnt

(

dt

)

SC_ATOMIC_SUB((dt)->use_cnt, 1)

Definition at line 116 of file defrag-hash.c.

Referenced by DefragTrackerRelease().

#define DefragTrackerIncrUsecnt

(

dt

)

SC_ATOMIC_ADD((dt)->use_cnt, 1)

Definition at line 114 of file defrag-hash.c.

Referenced by DefragGetTrackerFromHash(), and DefragLookupTrackerFromHash().

Typedef Documentation

typedef struct DefragHashKey4_ DefragHashKey4

typedef struct DefragHashKey6_ DefragHashKey6

Function Documentation

DefragTracker* DefragGetTrackerFromHash

(

Packet *

p

)

Definition at line 526 of file defrag-hash.c.

References defragtracker_hash, DefragTrackerIncrUsecnt, DRLOCK_LOCK, DRLOCK_UNLOCK, DefragTrackerHashRow_::head, DefragTracker_::hnext, DefragTracker_::hprev, DefragTracker_::lock, DefragTracker_::remove, SCMutexLock, and DefragTrackerHashRow_::tail.

Referenced by DefragGetOsPolicy().

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void DefragHashShutdown

(

void

)

shutdown the flow engine

Warning

Not thread safe

Definition at line 294 of file defrag-hash.c.

References BUG_ON, defrag_config, defragtracker_hash, DefragTrackerClearMemory(), DefragTrackerDequeue(), DefragTrackerQueueDestroy(), DRLOCK_DESTROY, DefragConfig_::hash_size, DefragTrackerHashRow_::head, DefragTracker_::hnext, SC_ATOMIC_DESTROY, SC_ATOMIC_GET, SC_ATOMIC_SUB, and SCFree.

Referenced by DefragDestroy().

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void DefragInitConfig

(

char

quiet

)

initialize the configuration

Warning

Not thread safe

set config values for memcap, prealloc and hash_size

Definition at line 161 of file defrag-hash.c.

References ByteExtractStringUint32(), ConfGet(), ConfValIsTrue(), DEFRAG_CHECK_MEMCAP, defrag_config, DEFRAG_DEFAULT_HASHSIZE, DEFRAG_DEFAULT_MEMCAP, DEFRAG_DEFAULT_PREALLOC, defragtracker_hash, DefragTrackerEnqueue(), DefragTrackerQueueInit(), DRLOCK_INIT, FALSE, DefragConfig_::hash_rand, DefragConfig_::hash_size, DefragTrackerQueue_::len, ParseSizeStringU64(), DefragConfig_::prealloc, RandomGet(), SC_ATOMIC_ADD, SC_ATOMIC_GET, SC_ATOMIC_INIT, SC_ATOMIC_SET, SC_ERR_DEFRAG_INIT, SC_ERR_FATAL, SC_ERR_SIZE_PARSE, SCCalloc, SCLogDebug, SCLogError, unlikely, and WarnInvalidConfEntry.

Referenced by DefragInit().

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DefragTracker* DefragLookupTrackerFromHash

(

Packet *

p

)

look up a tracker in the hash

Parameters

a	address to look up

Return values

h	LOCKED tracker or NULL

Definition at line 625 of file defrag-hash.c.

References defrag_config, defragtracker_hash, DefragTrackerClearMemory(), DefragTrackerIncrUsecnt, DRLOCK_LOCK, DRLOCK_TRYLOCK, DRLOCK_UNLOCK, DefragConfig_::hash_size, DefragTrackerHashRow_::head, DefragTracker_::hnext, DefragTracker_::hprev, DefragTracker_::lock, SC_ATOMIC_ADD, SC_ATOMIC_GET, SCMutexLock, SCMutexTrylock, SCMutexUnlock, and DefragTrackerHashRow_::tail.

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void DefragTrackerClearMemory

(

DefragTracker *

dt

)

Definition at line 149 of file defrag-hash.c.

References DefragTrackerFreeFrags(), and SC_ATOMIC_DESTROY.

Referenced by DefragHashShutdown(), DefragLookupTrackerFromHash(), and DefragTrackerMoveToSpare().

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uint64_t DefragTrackerGetMemcap

(

void

)

Return memcap value.

Return values

memcap

value

Definition at line 53 of file defrag-hash.c.

References defrag_config, and SC_ATOMIC_GET.

Referenced by RunModeUnixSocketGetDefaultMode().

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uint64_t DefragTrackerGetMemuse

(

void

)

Return memuse value.

Return values

memuse

value

Definition at line 64 of file defrag-hash.c.

References SC_ATOMIC_GET.

Referenced by RunModeUnixSocketGetDefaultMode().

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void DefragTrackerMoveToSpare

(

DefragTracker *

h

)

Definition at line 75 of file defrag-hash.c.

References DEFRAG_CHECK_MEMCAP, DefragTrackerClearMemory(), DefragTrackerEnqueue(), DefragTracker_::lock, SC_ATOMIC_ADD, SC_ATOMIC_INIT, SC_ATOMIC_SUB, SCFree, SCMalloc, SCMutexDestroy, SCMutexInit, and unlikely.

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void DefragTrackerRelease

(

DefragTracker *

t

)

Definition at line 143 of file defrag-hash.c.

References DefragTrackerDecrUsecnt, DefragTracker_::lock, and SCMutexUnlock.

Referenced by Defrag().

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int DefragTrackerSetMemcap

(

uint64_t

size

)

Update memcap value.

Parameters

size	new memcap value

Definition at line 38 of file defrag-hash.c.

References defrag_config, SC_ATOMIC_GET, and SC_ATOMIC_SET.

Referenced by RunModeUnixSocketGetDefaultMode().

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uint32_t DefragTrackerSpareQueueGetSize

(

void

)

Definition at line 70 of file defrag-hash.c.

References DefragTrackerQueueLen().

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