suricata
Data Structures | Macros | Typedefs | Functions | Variables
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.
 
uint64_t DefragTrackerGetMemcap (void)
 Return memcap value.
 
uint64_t DefragTrackerGetMemuse (void)
 Return memuse value.
 
enum ExceptionPolicy DefragGetMemcapExceptionPolicy (void)
 
void DefragTrackerMoveToSpare (DefragTracker *h)
 
void DefragTrackerRelease (DefragTracker *t)
 
void DefragTrackerClearMemory (DefragTracker *dt)
 
void DefragInitConfig (bool quiet)
 initialize the configuration
 
void DefragHashShutdown (void)
 shutdown the flow engine
 
DefragTracker * DefragGetTrackerFromHash (ThreadVars *tv, DecodeThreadVars *dtv, Packet *p)
 
DefragTracker * DefragLookupTrackerFromHash (Packet *p)
 look up a tracker in the hash
 

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])
dst
uint16_t dst
Definition app-layer-dnp3.h:4
src
uint16_t src
Definition app-layer-dnp3.h:5
proto
uint8_t proto
Definition decode-template.h:0
CMP_ADDR
#define CMP_ADDR(a1, a2)
Definition decode.h:222

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

◆ DEFRAG_DEFAULT_HASHSIZE

#define DEFRAG_DEFAULT_HASHSIZE   4096

Definition at line 163 of file defrag-hash.c.

◆ DEFRAG_DEFAULT_MEMCAP

#define DEFRAG_DEFAULT_MEMCAP   16777216

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

◆ DEFRAG_DEFAULT_PREALLOC

#define DEFRAG_DEFAULT_PREALLOC   1000

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

◆ DefragTrackerDecrUsecnt

#define DefragTrackerDecrUsecnt (   dt)     SC_ATOMIC_SUB((dt)->use_cnt, 1)

Definition at line 124 of file defrag-hash.c.

◆ DefragTrackerIncrUsecnt

#define DefragTrackerIncrUsecnt (   dt)     SC_ATOMIC_ADD((dt)->use_cnt, 1)

Definition at line 122 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 80 of file defrag-hash.c.

References defrag_config, and DefragConfig_::memcap_policy.

Referenced by DecodeRegisterPerfCounters(), and ExceptionPolicyTargetPolicy().

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◆ DefragGetTrackerFromHash()

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

Definition at line 525 of file defrag-hash.c.

References BUG_ON, DecodeThreadVars_::counter_defrag_tracker_timeout, defragtracker_hash, DefragTrackerClearMemory(), DefragTrackerIncrUsecnt, DefragTrackerMoveToSpare(), DefragTrackerTimedOut(), DRLOCK_LOCK, DRLOCK_UNLOCK, dtv, DefragTrackerHashRow_::head, DefragTracker_::hnext, DefragTracker_::lock, DefragTracker_::remove, SCMutexLock, SCMutexUnlock, StatsIncr(), Packet_::ts, and tv.

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◆ DefragHashShutdown()

void DefragHashShutdown ( void  )

shutdown the flow engine

Warning
Not thread safe

Definition at line 292 of file defrag-hash.c.

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

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_CHECK_MEMCAP, defrag_config, DEFRAG_DEFAULT_HASHSIZE, DEFRAG_DEFAULT_MEMCAP, DEFRAG_DEFAULT_PREALLOC, defragtracker_hash, DefragTrackerEnqueue(), DefragTrackerStackInit(), DefragTrackerStackSize(), DRLOCK_INIT, ExceptionPolicyParse(), FatalError, DefragConfig_::hash_rand, DefragConfig_::hash_size, DefragConfig_::memcap_policy, ParseSizeStringU64(), DefragConfig_::prealloc, RandomGet(), SC_ATOMIC_ADD, SC_ATOMIC_GET, SC_ATOMIC_INIT, SC_ATOMIC_SET, SCCalloc, SCConfGet(), SCConfValIsTrue(), SCLogConfig, SCLogDebug, SCLogError, StringParseUint32(), unlikely, and WarnInvalidConfEntry.

Referenced by DefragInit().

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◆ DefragLookupTrackerFromHash()

DefragTracker * DefragLookupTrackerFromHash ( Packet *  p)

look up a tracker in the hash

Parameters
aaddress to look up
Return values
hLOCKED tracker or NULL

Definition at line 620 of file defrag-hash.c.

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

◆ DefragTrackerClearMemory()

void DefragTrackerClearMemory ( DefragTracker *  dt)

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

References DefragTrackerFreeFrags().

Referenced by DefragGetTrackerFromHash(), and DefragHashShutdown().

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◆ DefragTrackerGetMemcap()

uint64_t DefragTrackerGetMemcap ( void  )

Return memcap value.

Return values
memcapvalue

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
memusevalue

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(), and SC_ATOMIC_SUB.

Referenced by DefragGetTrackerFromHash().

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◆ DefragTrackerRelease()

void DefragTrackerRelease ( DefragTracker *  t)

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

References DefragTrackerDecrUsecnt, DefragTracker_::lock, and SCMutexUnlock.

Referenced by Defrag().

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◆ DefragTrackerSetMemcap()

int DefragTrackerSetMemcap ( uint64_t  size)

Update memcap value.

Parameters
sizenew 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 DefragGetMemcapExceptionPolicy(), DefragHashShutdown(), 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 DefragGetTrackerFromHash(), DefragHashShutdown(), DefragInitConfig(), DefragLookupTrackerFromHash(), and DefragTimeoutHash().