defrag-hash.c File Reference

#include "suricata-common.h"
#include "conf.h"
#include "defrag-hash.h"
#include "defrag-stack.h"
#include "defrag-config.h"
#include "defrag-timeout.h"
#include "util-random.h"
#include "util-byte.h"
#include "util-misc.h"
#include "util-hash-lookup3.h"
#include "util-validate.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
	SC_ATOMIC_DECLARE (uint64_t, defrag_memuse)
	SC_ATOMIC_DECLARE (unsigned int, defragtracker_counter)
	SC_ATOMIC_DECLARE (unsigned int, defragtracker_prune_idx)
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...
enum ExceptionPolicy	DefragGetMemcapExceptionPolicy (void)
void	DefragTrackerMoveToSpare (DefragTracker *h)
void	DefragTrackerRelease (DefragTracker *t)
void	DefragTrackerClearMemory (DefragTracker *dt)
void	DefragInitConfig (bool quiet)
	initialize the configuration More...
void	DefragHashShutdown (void)
	shutdown the flow engine More...
DefragTracker *	DefragGetTrackerFromHash (ThreadVars *tv, DecodeThreadVars *dtv, Packet *p)
DefragTracker *	DefragLookupTrackerFromHash (Packet *p)
	look up a tracker in the hash More...

Variables
DefragTrackerHashRow *	defragtracker_hash
DefragConfig	defrag_config

Macro Definition Documentation

CMP_DEFRAGTRACKER

#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 == PacketGetIPProto(d2) && (d1)->id == (id) &&                             \
            (d1)->vlan_id[0] == (d2)->vlan_id[0] && (d1)->vlan_id[1] == (d2)->vlan_id[1] &&        \
            (d1)->vlan_id[2] == (d2)->vlan_id[2])

Definition at line 432 of file defrag-hash.c.

DEFRAG_DEFAULT_HASHSIZE

#define DEFRAG_DEFAULT_HASHSIZE   4096

Definition at line 164 of file defrag-hash.c.

DEFRAG_DEFAULT_MEMCAP

#define DEFRAG_DEFAULT_MEMCAP   16777216

Definition at line 165 of file defrag-hash.c.

DEFRAG_DEFAULT_PREALLOC

#define DEFRAG_DEFAULT_PREALLOC   1000

Definition at line 166 of file defrag-hash.c.

DefragTrackerDecrUsecnt

#define DefragTrackerDecrUsecnt

(

dt

)

SC_ATOMIC_SUB((dt)->use_cnt, 1)

Definition at line 125 of file defrag-hash.c.

DefragTrackerIncrUsecnt

#define DefragTrackerIncrUsecnt

(

dt

)

SC_ATOMIC_ADD((dt)->use_cnt, 1)

Definition at line 123 of file defrag-hash.c.

Typedef Documentation

DefragHashKey4

typedef struct DefragHashKey4_ DefragHashKey4

DefragHashKey6

typedef struct DefragHashKey6_ DefragHashKey6

Function Documentation

DefragGetMemcapExceptionPolicy()

enum ExceptionPolicy DefragGetMemcapExceptionPolicy

(

void

)

Definition at line 74 of file defrag-hash.c.

DefragGetTrackerFromHash()

DefragTracker* DefragGetTrackerFromHash	(	ThreadVars *	tv,
		DecodeThreadVars *	dtv,
		Packet *	p
	)

Definition at line 524 of file defrag-hash.c.

DefragHashShutdown()

void DefragHashShutdown

(

void

)

shutdown the flow engine

Warning

Not thread safe

Definition at line 291 of file defrag-hash.c.

References DefragTrackerDequeue().

Referenced by DefragDestroy().

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DefragInitConfig()

void DefragInitConfig

(

bool

quiet

)

initialize the configuration

Warning

Not thread safe

set config values for memcap, prealloc and hash_size

Definition at line 169 of file defrag-hash.c.

References defrag_config, DefragTrackerStackInit(), SC_ATOMIC_INIT, and SCLogDebug.

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DefragLookupTrackerFromHash()

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 619 of file defrag-hash.c.

DefragTrackerClearMemory()

void DefragTrackerClearMemory

(

DefragTracker *

dt

)

Definition at line 158 of file defrag-hash.c.

References DefragTrackerFreeFrags().

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DefragTrackerGetMemcap()

uint64_t DefragTrackerGetMemcap

(

void

)

Return memcap value.

Return values

memcap

value

Definition at line 63 of file defrag-hash.c.

References defrag_config, and SC_ATOMIC_GET.

DefragTrackerGetMemuse()

uint64_t DefragTrackerGetMemuse

(

void

)

Return memuse value.

Return values

memuse

value

Definition at line 74 of file defrag-hash.c.

References SC_ATOMIC_GET.

DefragTrackerMoveToSpare()

void DefragTrackerMoveToSpare

(

DefragTracker *

h

)

Definition at line 85 of file defrag-hash.c.

References DefragTrackerEnqueue().

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DefragTrackerRelease()

void DefragTrackerRelease

(

DefragTracker *

t

)

Definition at line 152 of file defrag-hash.c.

References DefragTrackerDecrUsecnt, DefragTracker_::lock, and SCMutexUnlock.

DefragTrackerSetMemcap()

int DefragTrackerSetMemcap

(

uint64_t

size

)

Update memcap value.

Parameters

size	new memcap value

Definition at line 48 of file defrag-hash.c.

References defrag_config, SC_ATOMIC_GET, and SC_ATOMIC_SET.

SC_ATOMIC_DECLARE() [1/3]

SC_ATOMIC_DECLARE	(	uint64_t	,
		defrag_memuse
	)

SC_ATOMIC_DECLARE() [2/3]

SC_ATOMIC_DECLARE	(	unsigned int	,
		defragtracker_counter
	)

SC_ATOMIC_DECLARE() [3/3]

SC_ATOMIC_DECLARE	(	unsigned int	,
		defragtracker_prune_idx
	)

Variable Documentation

defrag_config

DefragConfig defrag_config

Definition at line 32 of file defrag-hash.c.

Referenced by DefragInitConfig(), DefragTimeoutHash(), DefragTrackerGetMemcap(), and DefragTrackerSetMemcap().

defragtracker_hash

DefragTrackerHashRow* defragtracker_hash

defrag tracker hash table

Definition at line 31 of file defrag-hash.c.

Referenced by DefragTimeoutHash().