detect.h File Reference

#include "suricata-common.h"
#include "flow.h"
#include "detect-engine-proto.h"
#include "detect-reference.h"
#include "detect-metadata.h"
#include "detect-engine-register.h"
#include "util-prefilter.h"
#include "util-mpm.h"
#include "util-spm.h"
#include "util-hash.h"
#include "util-hashlist.h"
#include "util-radix-tree.h"
#include "util-file.h"
#include "reputation.h"

Include dependency graph for detect.h:

Go to the source code of this file.

Data Structures
struct	SignatureProperties
struct	DetectAddress_
	address structure for use in the detection engine. More...
struct	DetectAddressHead_
struct	DetectMatchAddressIPv4_
struct	DetectMatchAddressIPv6_
struct	DetectPort_
	Port structure for detection engine. More...
struct	IPOnlyCIDRItem_
struct	SigMatchCtx_
	Used to start a pointer to SigMatch context Should never be dereferenced without casting to something else. More...
struct	SigMatch_
	a single match condition for a signature More...
struct	SigMatchData_
	Data needed for Match() More...
struct	InspectionBuffer
struct	InspectionBufferMultipleForList
struct	TransformData_
struct	DetectEngineTransforms
struct	DetectEngineAppInspectionEngine_
struct	DetectBufferType_
struct	DetectEnginePktInspectionEngine
struct	DetectEngineFrameInspectionEngine
struct	SignatureInitDataBuffer_
struct	SignatureInitData_
struct	Signature_
	Signature container. More...
struct	DetectBufferMpmRegistry_
	one time registration of keywords at start up More...
struct	DetectPatternTracker
struct	DetectReplaceList_
struct	DetectVarList_
struct	SCFPSupportSMList_
struct	DetectEngineIPOnlyCtx_
	IP only rules matching ctx. More...
struct	DetectEngineLookupFlow_
struct	SigString_
struct	SigFileLoaderStat_
	Signature loader statistics. More...
struct	DetectEngineThreadKeywordCtxItem_
struct	DetectFileDataCfg
struct	DetectEngineCtx_
	main detection engine ctx More...
struct	SignatureNonPrefilterStore_
struct	RuleMatchCandidateTx
struct	DetectEngineThreadCtx_
struct	SigTableElmt_
	element in sigmatch type table. More...
struct	MpmStore_
struct	PrefilterEngineList_
struct	PrefilterEngine_
struct	SigGroupHeadInitData_
struct	SigGroupHead_
	Container for matching data for a signature group. More...
struct	DetectEngineTenantMapping_
struct	DetectEngineMasterCtx_

Macros
#define	DETECT_MAX_RULE_SIZE   8192
#define	DETECT_TRANSFORMS_MAX   16
#define	DETECT_DEFAULT_PRIO   3
#define	PACKET_ALERT_NOTX   UINT64_MAX
#define	DETECT_SM_LIST_NOTSET   INT_MAX
#define	ADDRESS_FLAG_NOT   0x01
#define	PORT_FLAG_ANY   0x01
#define	PORT_FLAG_NOT   0x02
#define	PORT_SIGGROUPHEAD_COPY   0x04
#define	SIG_FLAG_SRC_ANY   BIT_U32(0)
#define	SIG_FLAG_DST_ANY   BIT_U32(1)
#define	SIG_FLAG_SP_ANY   BIT_U32(2)
#define	SIG_FLAG_DP_ANY   BIT_U32(3)
#define	SIG_FLAG_DSIZE   BIT_U32(5)
#define	SIG_FLAG_APPLAYER   BIT_U32(6)
#define	SIG_FLAG_REQUIRE_PACKET   BIT_U32(9)
#define	SIG_FLAG_REQUIRE_STREAM   BIT_U32(10)
#define	SIG_FLAG_MPM_NEG   BIT_U32(11)
#define	SIG_FLAG_FLUSH   BIT_U32(12)
#define	SIG_FLAG_REQUIRE_STREAM_ONLY   BIT_U32(13)
#define	SIG_FLAG_REQUIRE_FLOWVAR   BIT_U32(17)
#define	SIG_FLAG_FILESTORE   BIT_U32(18)
#define	SIG_FLAG_TOSERVER   BIT_U32(19)
#define	SIG_FLAG_TOCLIENT   BIT_U32(20)
#define	SIG_FLAG_TLSSTORE   BIT_U32(21)
#define	SIG_FLAG_BYPASS   BIT_U32(22)
#define	SIG_FLAG_PREFILTER   BIT_U32(23)
#define	SIG_FLAG_SRC_IS_TARGET   BIT_U32(25)
#define	SIG_FLAG_DEST_IS_TARGET   BIT_U32(26)
#define	SIG_FLAG_HAS_TARGET   (SIG_FLAG_DEST_IS_TARGET|SIG_FLAG_SRC_IS_TARGET)
#define	SIG_FLAG_INIT_PACKET   BIT_U32(1)
#define	SIG_FLAG_INIT_FLOW   BIT_U32(2)
#define	SIG_FLAG_INIT_BIDIREC   BIT_U32(3)
#define	SIG_FLAG_INIT_FIRST_IPPROTO_SEEN   BIT_U32(4) /** < signature has seen the first ip_proto keyword */
#define	SIG_FLAG_INIT_STATE_MATCH   BIT_U32(6)
#define	SIG_FLAG_INIT_NEED_FLUSH   BIT_U32(7)
#define	SIG_FLAG_INIT_PRIO_EXPLICIT   BIT_U32(8)
#define	SIG_FLAG_INIT_FILEDATA   BIT_U32(9)
#define	SIG_FLAG_INIT_JA   BIT_U32(10)
#define	SIG_MASK_REQUIRE_PAYLOAD   BIT_U8(0)
#define	SIG_MASK_REQUIRE_FLOW   BIT_U8(1)
#define	SIG_MASK_REQUIRE_FLAGS_INITDEINIT   BIT_U8(2) /* SYN, FIN, RST */
#define	SIG_MASK_REQUIRE_FLAGS_UNUSUAL   BIT_U8(3) /* URG, ECN, CWR */
#define	SIG_MASK_REQUIRE_NO_PAYLOAD   BIT_U8(4)
#define	SIG_MASK_REQUIRE_REAL_PKT   BIT_U8(5)
#define	SIG_MASK_REQUIRE_ENGINE_EVENT   BIT_U8(7)
#define	SignatureMask   uint8_t
#define	FILE_SIG_NEED_FILE   0x01
#define	FILE_SIG_NEED_FILENAME   0x02
#define	FILE_SIG_NEED_MAGIC   0x04
#define	FILE_SIG_NEED_FILECONTENT   0x08
#define	FILE_SIG_NEED_MD5   0x10
#define	FILE_SIG_NEED_SHA1   0x20
#define	FILE_SIG_NEED_SHA256   0x40
#define	FILE_SIG_NEED_SIZE   0x80
#define	DE_QUIET   0x01
#define	DETECT_VAR_TYPE_FLOW_POSTMATCH   1
#define	DETECT_VAR_TYPE_PKT_POSTMATCH   2
#define	FLOW_STATES   2
#define	ENGINE_SGH_MPM_FACTORY_CONTEXT_START_ID_RANGE   (ENGINE_SGH_MPM_FACTORY_CONTEXT_AUTO + 1)
#define	DETECT_FILESTORE_MAX   15
#define	SIG_GROUP_HEAD_HAVERAWSTREAM   BIT_U16(0)
#define	SIG_GROUP_HEAD_HAVEFILEMD5   BIT_U16(2)
#define	SIG_GROUP_HEAD_HAVEFILESIZE   BIT_U16(3)
#define	SIG_GROUP_HEAD_HAVEFILESHA1   BIT_U16(4)
#define	SIG_GROUP_HEAD_HAVEFILESHA256   BIT_U16(5)
#define	SIGMATCH_NOOPT   BIT_U16(0)
#define	SIGMATCH_IPONLY_COMPAT   BIT_U16(1)
#define	SIGMATCH_DEONLY_COMPAT   BIT_U16(2)
#define	SIGMATCH_NOT_BUILT   BIT_U16(3)
#define	SIGMATCH_OPTIONAL_OPT   BIT_U16(4)
#define	SIGMATCH_QUOTES_OPTIONAL   BIT_U16(5)
#define	SIGMATCH_QUOTES_MANDATORY   BIT_U16(6)
#define	SIGMATCH_HANDLE_NEGATION   BIT_U16(7)
#define	SIGMATCH_INFO_CONTENT_MODIFIER   BIT_U16(8)
#define	SIGMATCH_INFO_STICKY_BUFFER   BIT_U16(9)
#define	SIGMATCH_INFO_DEPRECATED   BIT_U16(10)
#define	SIGMATCH_STRICT_PARSING   BIT_U16(11)

Typedefs
typedef struct SCDetectRequiresStatus	SCDetectRequiresStatus
typedef struct DetectAddress_	DetectAddress
	address structure for use in the detection engine. More...
typedef struct DetectAddressHead_	DetectAddressHead
typedef struct DetectMatchAddressIPv4_	DetectMatchAddressIPv4
typedef struct DetectMatchAddressIPv6_	DetectMatchAddressIPv6
typedef struct DetectPort_	DetectPort
	Port structure for detection engine. More...
typedef struct IPOnlyCIDRItem_	IPOnlyCIDRItem
typedef struct SigMatchCtx_	SigMatchCtx
	Used to start a pointer to SigMatch context Should never be dereferenced without casting to something else. More...
typedef struct SigMatch_	SigMatch
	a single match condition for a signature More...
typedef struct SigMatchData_	SigMatchData
	Data needed for Match() More...
typedef struct InspectionBuffer	InspectionBuffer
typedef struct InspectionBufferMultipleForList	InspectionBufferMultipleForList
typedef struct TransformData_	TransformData
typedef struct DetectEngineTransforms	DetectEngineTransforms
typedef InspectionBuffer *(*	InspectionBufferGetDataPtr) (struct DetectEngineThreadCtx_ *det_ctx, const DetectEngineTransforms *transforms, Flow *f, const uint8_t flow_flags, void *txv, const int list_id)
typedef InspectionBuffer *(*	InspectionMultiBufferGetDataPtr) (struct DetectEngineThreadCtx_ *det_ctx, const DetectEngineTransforms *transforms, Flow *f, const uint8_t flow_flags, void *txv, const int list_id, const uint32_t local_id)
typedef uint8_t(*	InspectEngineFuncPtr) (struct DetectEngineCtx_ *de_ctx, struct DetectEngineThreadCtx_ *det_ctx, const struct DetectEngineAppInspectionEngine_ *engine, const struct Signature_ *s, Flow *f, uint8_t flags, void *alstate, void *txv, uint64_t tx_id)
typedef struct DetectEngineAppInspectionEngine_	DetectEngineAppInspectionEngine
typedef struct DetectBufferType_	DetectBufferType
typedef int(*	InspectionBufferPktInspectFunc) (struct DetectEngineThreadCtx_ *, const struct DetectEnginePktInspectionEngine *engine, const struct Signature_ *s, Packet *p, uint8_t *alert_flags)
typedef InspectionBuffer *(*	InspectionBufferGetPktDataPtr) (struct DetectEngineThreadCtx_ *det_ctx, const DetectEngineTransforms *transforms, Packet *p, const int list_id)
typedef struct DetectEnginePktInspectionEngine	DetectEnginePktInspectionEngine
typedef int(*	InspectionBufferFrameInspectFunc) (struct DetectEngineThreadCtx_ *, const struct DetectEngineFrameInspectionEngine *engine, const struct Signature_ *s, Packet *p, const struct Frames *frames, const struct Frame *frame)
typedef struct DetectEngineFrameInspectionEngine	DetectEngineFrameInspectionEngine
typedef struct SignatureInitDataBuffer_	SignatureInitDataBuffer
typedef struct SignatureInitData_	SignatureInitData
typedef struct Signature_	Signature
	Signature container. More...
typedef struct DetectBufferMpmRegistry_	DetectBufferMpmRegistry
	one time registration of keywords at start up More...
typedef struct DetectPatternTracker	DetectPatternTracker
typedef struct DetectReplaceList_	DetectReplaceList
typedef struct DetectVarList_	DetectVarList
typedef struct SCFPSupportSMList_	SCFPSupportSMList
typedef struct DetectEngineIPOnlyCtx_	DetectEngineIPOnlyCtx
	IP only rules matching ctx. More...
typedef struct DetectEngineLookupFlow_	DetectEngineLookupFlow
typedef struct SigString_	SigString
typedef struct SigFileLoaderStat_	SigFileLoaderStat
	Signature loader statistics. More...
typedef struct DetectEngineThreadKeywordCtxItem_	DetectEngineThreadKeywordCtxItem
typedef struct DetectEngineCtx_	DetectEngineCtx
	main detection engine ctx More...
typedef struct SignatureNonPrefilterStore_	SignatureNonPrefilterStore
typedef struct RuleMatchCandidateTx	RuleMatchCandidateTx
typedef struct DetectEngineThreadCtx_	DetectEngineThreadCtx
typedef struct SigTableElmt_	SigTableElmt
	element in sigmatch type table. More...
typedef struct MpmStore_	MpmStore
typedef void(*	PrefilterPktFn) (DetectEngineThreadCtx *det_ctx, Packet *p, const void *pectx)
typedef void(*	PrefilterFrameFn) (DetectEngineThreadCtx *det_ctx, const void *pectx, Packet *p, const struct Frames *frames, const struct Frame *frame)
typedef struct AppLayerTxData	AppLayerTxData
typedef void(*	PrefilterTxFn) (DetectEngineThreadCtx *det_ctx, const void *pectx, Packet *p, Flow *f, void *tx, const uint64_t tx_id, const AppLayerTxData *tx_data, const uint8_t flags)
typedef struct PrefilterEngineList_	PrefilterEngineList
typedef struct PrefilterEngine_	PrefilterEngine
typedef struct SigGroupHeadInitData_	SigGroupHeadInitData
typedef struct SigGroupHead_	SigGroupHead
	Container for matching data for a signature group. More...
typedef struct DetectEngineTenantMapping_	DetectEngineTenantMapping
typedef struct DetectEngineMasterCtx_	DetectEngineMasterCtx

Enumerations
enum	SignatureType {   SIG_TYPE_NOT_SET = 0, SIG_TYPE_IPONLY, SIG_TYPE_LIKE_IPONLY, SIG_TYPE_PDONLY,   SIG_TYPE_DEONLY, SIG_TYPE_PKT, SIG_TYPE_PKT_STREAM, SIG_TYPE_STREAM,   SIG_TYPE_APPLAYER, SIG_TYPE_APP_TX, SIG_TYPE_MAX }
enum	SignaturePropertyFlowAction { SIG_PROP_FLOW_ACTION_PACKET, SIG_PROP_FLOW_ACTION_FLOW, SIG_PROP_FLOW_ACTION_FLOW_IF_STATEFUL }
enum	DetectSigmatchListEnum {   DETECT_SM_LIST_MATCH = 0, DETECT_SM_LIST_PMATCH, DETECT_SM_LIST_BASE64_DATA, DETECT_SM_LIST_POSTMATCH,   DETECT_SM_LIST_TMATCH, DETECT_SM_LIST_SUPPRESS, DETECT_SM_LIST_THRESHOLD, DETECT_SM_LIST_MAX,   DETECT_SM_LIST_DYNAMIC_START = DETECT_SM_LIST_MAX }
enum	{   ADDRESS_ER = -1, ADDRESS_LT, ADDRESS_LE, ADDRESS_EQ,   ADDRESS_ES, ADDRESS_EB, ADDRESS_GE, ADDRESS_GT }
enum	{   PORT_ER = -1, PORT_LT, PORT_LE, PORT_EQ,   PORT_ES, PORT_EB, PORT_GE, PORT_GT }
enum	DetectBufferMpmType { DETECT_BUFFER_MPM_TYPE_PKT, DETECT_BUFFER_MPM_TYPE_APP, DETECT_BUFFER_MPM_TYPE_FRAME, DETECT_BUFFER_MPM_TYPE_SIZE }
enum	DetectEnginePrefilterSetting { DETECT_PREFILTER_MPM = 0, DETECT_PREFILTER_AUTO = 1 }
enum	DetectEngineType { DETECT_ENGINE_TYPE_NORMAL = 0, DETECT_ENGINE_TYPE_DD_STUB = 1, DETECT_ENGINE_TYPE_MT_STUB = 2, DETECT_ENGINE_TYPE_TENANT = 3 }
enum	{   ENGINE_PROFILE_UNKNOWN, ENGINE_PROFILE_LOW, ENGINE_PROFILE_MEDIUM, ENGINE_PROFILE_HIGH,   ENGINE_PROFILE_CUSTOM }
enum	{ ENGINE_SGH_MPM_FACTORY_CONTEXT_FULL = 0, ENGINE_SGH_MPM_FACTORY_CONTEXT_SINGLE, ENGINE_SGH_MPM_FACTORY_CONTEXT_AUTO }
enum	{   FILE_DECODER_EVENT_NO_MEM, FILE_DECODER_EVENT_INVALID_SWF_LENGTH, FILE_DECODER_EVENT_INVALID_SWF_VERSION, FILE_DECODER_EVENT_Z_DATA_ERROR,   FILE_DECODER_EVENT_Z_STREAM_ERROR, FILE_DECODER_EVENT_Z_BUF_ERROR, FILE_DECODER_EVENT_Z_UNKNOWN_ERROR, FILE_DECODER_EVENT_LZMA_IO_ERROR,   FILE_DECODER_EVENT_LZMA_HEADER_TOO_SHORT_ERROR, FILE_DECODER_EVENT_LZMA_DECODER_ERROR, FILE_DECODER_EVENT_LZMA_MEMLIMIT_ERROR, FILE_DECODER_EVENT_LZMA_XZ_ERROR,   FILE_DECODER_EVENT_LZMA_UNKNOWN_ERROR, DETECT_EVENT_TOO_MANY_BUFFERS }
enum	MpmBuiltinBuffers {   MPMB_TCP_PKT_TS, MPMB_TCP_PKT_TC, MPMB_TCP_STREAM_TS, MPMB_TCP_STREAM_TC,   MPMB_UDP_TS, MPMB_UDP_TC, MPMB_OTHERIP, MPMB_MAX }
enum	DetectEngineTenantSelectors { TENANT_SELECTOR_UNKNOWN = 0, TENANT_SELECTOR_DIRECT, TENANT_SELECTOR_VLAN, TENANT_SELECTOR_LIVEDEV }

Functions
TmEcode	Detect (ThreadVars *tv, Packet *p, void *data)
	Detection engine thread wrapper. More...
SigMatch *	SigMatchAlloc (void)
Signature *	SigFindSignatureBySidGid (DetectEngineCtx *, uint32_t, uint32_t)
	Find a specific signature by sid and gid. More...
void	SigMatchFree (DetectEngineCtx *, SigMatch *sm)
	free a SigMatch More...
void	SigRegisterTests (void)
void	DisableDetectFlowFileFlags (Flow *f)
	disable file features we don't need Called if we have no detection engine. More...
char *	DetectLoadCompleteSigPath (const DetectEngineCtx *, const char *sig_file)
	Create the path if default-rule-path was specified. More...
int	SigLoadSignatures (DetectEngineCtx *, char *, bool)
	Load signatures. More...
void	SigMatchSignatures (ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, Packet *p)
	wrapper for old tests More...
int	SignatureIsIPOnly (DetectEngineCtx *de_ctx, const Signature *s)
	Test is a initialized signature is IP only. More...
const SigGroupHead *	SigMatchSignaturesGetSgh (const DetectEngineCtx *de_ctx, const Packet *p)
	Get the SigGroupHead for a packet. More...
int	DetectUnregisterThreadCtxFuncs (DetectEngineCtx *, void *data, const char *name)
	Remove Thread keyword context registration. More...
int	DetectRegisterThreadCtxFuncs (DetectEngineCtx *, const char *name, void *(*InitFunc)(void *), void *data, void(*FreeFunc)(void *), int)
	Register Thread keyword context Funcs. More...
void *	DetectThreadCtxGetKeywordThreadCtx (DetectEngineThreadCtx *, int)
	Retrieve thread local keyword ctx by id. More...
void *	DetectGetInnerTx (void *tx_ptr, AppProto alproto, AppProto engine_alproto, uint8_t flow_flags)
void	RuleMatchCandidateTxArrayInit (DetectEngineThreadCtx *det_ctx, uint32_t size)
void	RuleMatchCandidateTxArrayFree (DetectEngineThreadCtx *det_ctx)
int	DetectFlowbitsAnalyze (DetectEngineCtx *de_ctx)
int	DetectMetadataHashInit (DetectEngineCtx *de_ctx)
void	DetectMetadataHashFree (DetectEngineCtx *de_ctx)
void	DetectEngineSetEvent (DetectEngineThreadCtx *det_ctx, uint8_t e)
void	DumpPatterns (DetectEngineCtx *de_ctx)

Variables
const struct SignatureProperties	signature_properties [SIG_TYPE_MAX]
SigTableElmt *	sigmatch_table

Detailed Description

Author

Victor Julien victo.nosp@m.r@in.nosp@m.linia.nosp@m.c.ne.nosp@m.t

Definition in file detect.h.

Macro Definition Documentation

ADDRESS_FLAG_NOT

#define ADDRESS_FLAG_NOT   0x01

address is negated

Definition at line 160 of file detect.h.

DE_QUIET

#define DE_QUIET   0x01

DE is quiet (esp for unittests)

Definition at line 324 of file detect.h.

DETECT_DEFAULT_PRIO

#define DETECT_DEFAULT_PRIO   3

default rule priority if not set through priority keyword or via classtype.

Definition at line 51 of file detect.h.

DETECT_FILESTORE_MAX

#define DETECT_FILESTORE_MAX   15

Definition at line 1068 of file detect.h.

DETECT_MAX_RULE_SIZE

#define DETECT_MAX_RULE_SIZE   8192

Definition at line 45 of file detect.h.

DETECT_SM_LIST_NOTSET

#define DETECT_SM_LIST_NOTSET   INT_MAX

Definition at line 142 of file detect.h.

DETECT_TRANSFORMS_MAX

#define DETECT_TRANSFORMS_MAX   16

Definition at line 47 of file detect.h.

DETECT_VAR_TYPE_FLOW_POSTMATCH

#define DETECT_VAR_TYPE_FLOW_POSTMATCH   1

only execute flowvar storage if rule matched

Definition at line 745 of file detect.h.

DETECT_VAR_TYPE_PKT_POSTMATCH

#define DETECT_VAR_TYPE_PKT_POSTMATCH   2

Definition at line 746 of file detect.h.

ENGINE_SGH_MPM_FACTORY_CONTEXT_START_ID_RANGE

#define ENGINE_SGH_MPM_FACTORY_CONTEXT_START_ID_RANGE   (ENGINE_SGH_MPM_FACTORY_CONTEXT_AUTO + 1)

Definition at line 1065 of file detect.h.

FILE_SIG_NEED_FILE

#define FILE_SIG_NEED_FILE   0x01

Definition at line 314 of file detect.h.

FILE_SIG_NEED_FILECONTENT

#define FILE_SIG_NEED_FILECONTENT   0x08

Definition at line 317 of file detect.h.

FILE_SIG_NEED_FILENAME

#define FILE_SIG_NEED_FILENAME   0x02

Definition at line 315 of file detect.h.

FILE_SIG_NEED_MAGIC

#define FILE_SIG_NEED_MAGIC   0x04

need the start of the file

Definition at line 316 of file detect.h.

FILE_SIG_NEED_MD5

#define FILE_SIG_NEED_MD5   0x10

Definition at line 318 of file detect.h.

FILE_SIG_NEED_SHA1

#define FILE_SIG_NEED_SHA1   0x20

Definition at line 319 of file detect.h.

FILE_SIG_NEED_SHA256

#define FILE_SIG_NEED_SHA256   0x40

Definition at line 320 of file detect.h.

FILE_SIG_NEED_SIZE

#define FILE_SIG_NEED_SIZE   0x80

Definition at line 321 of file detect.h.

FLOW_STATES

#define FLOW_STATES   2

Definition at line 834 of file detect.h.

PACKET_ALERT_NOTX

#define PACKET_ALERT_NOTX   UINT64_MAX

Definition at line 54 of file detect.h.

PORT_FLAG_ANY

#define PORT_FLAG_ANY   0x01

'any' special port

Definition at line 213 of file detect.h.

PORT_FLAG_NOT

#define PORT_FLAG_NOT   0x02

negated port

Definition at line 214 of file detect.h.

PORT_SIGGROUPHEAD_COPY

#define PORT_SIGGROUPHEAD_COPY   0x04

sgh is a ptr copy

Definition at line 215 of file detect.h.

SIG_FLAG_APPLAYER

#define SIG_FLAG_APPLAYER   BIT_U32(6)

signature applies to app layer instead of packets

Definition at line 247 of file detect.h.

SIG_FLAG_BYPASS

#define SIG_FLAG_BYPASS   BIT_U32(22)

Definition at line 273 of file detect.h.

SIG_FLAG_DEST_IS_TARGET

#define SIG_FLAG_DEST_IS_TARGET   BIT_U32(26)

Info for Source and Target identification

Definition at line 282 of file detect.h.

SIG_FLAG_DP_ANY

#define SIG_FLAG_DP_ANY   BIT_U32(3)

destination port is any

Definition at line 242 of file detect.h.

SIG_FLAG_DSIZE

#define SIG_FLAG_DSIZE   BIT_U32(5)

signature has a dsize setting

Definition at line 246 of file detect.h.

SIG_FLAG_DST_ANY

#define SIG_FLAG_DST_ANY   BIT_U32(1)

destination is any

Definition at line 240 of file detect.h.

SIG_FLAG_FILESTORE

#define SIG_FLAG_FILESTORE   BIT_U32(18)

signature has filestore keyword

Definition at line 266 of file detect.h.

SIG_FLAG_FLUSH

#define SIG_FLAG_FLUSH   BIT_U32(12)

detection logic needs stream flush notification

Definition at line 256 of file detect.h.

SIG_FLAG_HAS_TARGET

#define SIG_FLAG_HAS_TARGET   (SIG_FLAG_DEST_IS_TARGET|SIG_FLAG_SRC_IS_TARGET)

Definition at line 284 of file detect.h.

SIG_FLAG_INIT_BIDIREC

#define SIG_FLAG_INIT_BIDIREC   BIT_U32(3)

signature has bidirectional operator

Definition at line 290 of file detect.h.

SIG_FLAG_INIT_FILEDATA

#define SIG_FLAG_INIT_FILEDATA   BIT_U32(9)

signature has filedata keyword

Definition at line 297 of file detect.h.

SIG_FLAG_INIT_FIRST_IPPROTO_SEEN

#define SIG_FLAG_INIT_FIRST_IPPROTO_SEEN   BIT_U32(4) /** < signature has seen the first ip_proto keyword */

Definition at line 291 of file detect.h.

SIG_FLAG_INIT_FLOW

#define SIG_FLAG_INIT_FLOW   BIT_U32(2)

signature has a flow setting

Definition at line 289 of file detect.h.

SIG_FLAG_INIT_JA

#define SIG_FLAG_INIT_JA   BIT_U32(10)

signature has ja3/ja4 keyword

Definition at line 298 of file detect.h.

SIG_FLAG_INIT_NEED_FLUSH

#define SIG_FLAG_INIT_NEED_FLUSH   BIT_U32(7)

Definition at line 294 of file detect.h.

SIG_FLAG_INIT_PACKET

#define SIG_FLAG_INIT_PACKET   BIT_U32(1)

signature has matches against a packet (as opposed to app layer)

Definition at line 288 of file detect.h.

SIG_FLAG_INIT_PRIO_EXPLICIT

#define SIG_FLAG_INIT_PRIO_EXPLICIT   BIT_U32(8)

priority is explicitly set by the priority keyword

Definition at line 296 of file detect.h.

SIG_FLAG_INIT_STATE_MATCH

#define SIG_FLAG_INIT_STATE_MATCH   BIT_U32(6)

signature has matches that require stateful inspection

Definition at line 293 of file detect.h.

SIG_FLAG_MPM_NEG

#define SIG_FLAG_MPM_NEG   BIT_U32(11)

Definition at line 254 of file detect.h.

SIG_FLAG_PREFILTER

#define SIG_FLAG_PREFILTER   BIT_U32(23)

sig is part of a prefilter engine

Definition at line 275 of file detect.h.

SIG_FLAG_REQUIRE_FLOWVAR

#define SIG_FLAG_REQUIRE_FLOWVAR   BIT_U32(17)

signature can only match if a flowbit, flowvar or flowint is available.

Definition at line 264 of file detect.h.

SIG_FLAG_REQUIRE_PACKET

#define SIG_FLAG_REQUIRE_PACKET   BIT_U32(9)

signature is requiring packet match

Definition at line 251 of file detect.h.

SIG_FLAG_REQUIRE_STREAM

#define SIG_FLAG_REQUIRE_STREAM   BIT_U32(10)

signature is requiring stream match

Definition at line 252 of file detect.h.

SIG_FLAG_REQUIRE_STREAM_ONLY

#define SIG_FLAG_REQUIRE_STREAM_ONLY   BIT_U32(13)

signature is requiring stream match. Stream match is not optional, so no \ fallback to packet payload.

Definition at line 260 of file detect.h.

SIG_FLAG_SP_ANY

#define SIG_FLAG_SP_ANY   BIT_U32(2)

source port is any

Definition at line 241 of file detect.h.

SIG_FLAG_SRC_ANY

#define SIG_FLAG_SRC_ANY   BIT_U32(0)

Note

: additions should be added to the rule analyzer as well source is any

Definition at line 239 of file detect.h.

SIG_FLAG_SRC_IS_TARGET

#define SIG_FLAG_SRC_IS_TARGET   BIT_U32(25)

Info for Source and Target identification

Definition at line 280 of file detect.h.

SIG_FLAG_TLSSTORE

#define SIG_FLAG_TLSSTORE   BIT_U32(21)

Definition at line 271 of file detect.h.

SIG_FLAG_TOCLIENT

#define SIG_FLAG_TOCLIENT   BIT_U32(20)

Definition at line 269 of file detect.h.

SIG_FLAG_TOSERVER

#define SIG_FLAG_TOSERVER   BIT_U32(19)

Definition at line 268 of file detect.h.

SIG_GROUP_HEAD_HAVEFILEMD5

#define SIG_GROUP_HEAD_HAVEFILEMD5   BIT_U16(2)

Definition at line 1335 of file detect.h.

SIG_GROUP_HEAD_HAVEFILESHA1

#define SIG_GROUP_HEAD_HAVEFILESHA1   BIT_U16(4)

Definition at line 1337 of file detect.h.

SIG_GROUP_HEAD_HAVEFILESHA256

#define SIG_GROUP_HEAD_HAVEFILESHA256   BIT_U16(5)

Definition at line 1338 of file detect.h.

SIG_GROUP_HEAD_HAVEFILESIZE

#define SIG_GROUP_HEAD_HAVEFILESIZE   BIT_U16(3)

Definition at line 1336 of file detect.h.

SIG_GROUP_HEAD_HAVERAWSTREAM

#define SIG_GROUP_HEAD_HAVERAWSTREAM   BIT_U16(0)

Definition at line 1331 of file detect.h.

SIG_MASK_REQUIRE_ENGINE_EVENT

#define SIG_MASK_REQUIRE_ENGINE_EVENT   BIT_U8(7)

Definition at line 309 of file detect.h.

SIG_MASK_REQUIRE_FLAGS_INITDEINIT

#define SIG_MASK_REQUIRE_FLAGS_INITDEINIT   BIT_U8(2) /* SYN, FIN, RST */

Definition at line 304 of file detect.h.

SIG_MASK_REQUIRE_FLAGS_UNUSUAL

#define SIG_MASK_REQUIRE_FLAGS_UNUSUAL   BIT_U8(3) /* URG, ECN, CWR */

Definition at line 305 of file detect.h.

SIG_MASK_REQUIRE_FLOW

#define SIG_MASK_REQUIRE_FLOW   BIT_U8(1)

Definition at line 303 of file detect.h.

SIG_MASK_REQUIRE_NO_PAYLOAD

#define SIG_MASK_REQUIRE_NO_PAYLOAD   BIT_U8(4)

Definition at line 306 of file detect.h.

SIG_MASK_REQUIRE_PAYLOAD

#define SIG_MASK_REQUIRE_PAYLOAD   BIT_U8(0)

Note

: additions should be added to the rule analyzer as well

Definition at line 302 of file detect.h.

SIG_MASK_REQUIRE_REAL_PKT

#define SIG_MASK_REQUIRE_REAL_PKT   BIT_U8(5)

Definition at line 307 of file detect.h.

SIGMATCH_DEONLY_COMPAT

#define SIGMATCH_DEONLY_COMPAT   BIT_U16(2)

sigmatch is compatible with a decode event only rule Flag to indicate that the signature is not built-in

Definition at line 1494 of file detect.h.

SIGMATCH_HANDLE_NEGATION

#define SIGMATCH_HANDLE_NEGATION   BIT_U16(7)

negation parsing is handled by the rule parser. Signature::init_data::negated will be set to true or false prior to calling the keyword parser. Exclamation mark is stripped from the input to the keyword parser.

Definition at line 1509 of file detect.h.

SIGMATCH_INFO_CONTENT_MODIFIER

#define SIGMATCH_INFO_CONTENT_MODIFIER   BIT_U16(8)

keyword is a content modifier

Definition at line 1511 of file detect.h.

SIGMATCH_INFO_DEPRECATED

#define SIGMATCH_INFO_DEPRECATED   BIT_U16(10)

keyword is deprecated: used to suggest an alternative

Definition at line 1515 of file detect.h.

SIGMATCH_INFO_STICKY_BUFFER

#define SIGMATCH_INFO_STICKY_BUFFER   BIT_U16(9)

keyword is a sticky buffer

Definition at line 1513 of file detect.h.

SIGMATCH_IPONLY_COMPAT

#define SIGMATCH_IPONLY_COMPAT   BIT_U16(1)

sigmatch is compatible with a ip only rule

Definition at line 1491 of file detect.h.

SIGMATCH_NOOPT

#define SIGMATCH_NOOPT   BIT_U16(0)

sigmatch has no options, so the parser shouldn't expect any

Definition at line 1489 of file detect.h.

SIGMATCH_NOT_BUILT

#define SIGMATCH_NOT_BUILT   BIT_U16(3)

Definition at line 1495 of file detect.h.

SIGMATCH_OPTIONAL_OPT

#define SIGMATCH_OPTIONAL_OPT   BIT_U16(4)

sigmatch may have options, so the parser should be ready to deal with both cases

Definition at line 1498 of file detect.h.

SIGMATCH_QUOTES_MANDATORY

#define SIGMATCH_QUOTES_MANDATORY   BIT_U16(6)

input MUST be wrapped in double quotes. They will be stripped before input data is passed to keyword parser. Missing double quotes lead to error and signature invalidation.

Definition at line 1505 of file detect.h.

SIGMATCH_QUOTES_OPTIONAL

#define SIGMATCH_QUOTES_OPTIONAL   BIT_U16(5)

input may be wrapped in double quotes. They will be stripped before input data is passed to keyword parser

Definition at line 1501 of file detect.h.

SIGMATCH_STRICT_PARSING

#define SIGMATCH_STRICT_PARSING   BIT_U16(11)

strict parsing is enabled

Definition at line 1517 of file detect.h.

SignatureMask

#define SignatureMask   uint8_t

Definition at line 312 of file detect.h.

Typedef Documentation

AppLayerTxData

typedef struct AppLayerTxData AppLayerTxData

Definition at line 1364 of file detect.h.

DetectAddress

typedef struct DetectAddress_ DetectAddress

address structure for use in the detection engine.

Contains the address information and matching information.

DetectAddressHead

typedef struct DetectAddressHead_ DetectAddressHead

Address grouping head. IPv4 and IPv6 are split out

DetectBufferMpmRegistry

typedef struct DetectBufferMpmRegistry_ DetectBufferMpmRegistry

one time registration of keywords at start up

DetectBufferType

typedef struct DetectBufferType_ DetectBufferType

DetectEngineAppInspectionEngine

typedef struct DetectEngineAppInspectionEngine_ DetectEngineAppInspectionEngine

DetectEngineCtx

typedef struct DetectEngineCtx_ DetectEngineCtx

main detection engine ctx

DetectEngineFrameInspectionEngine

typedef struct DetectEngineFrameInspectionEngine DetectEngineFrameInspectionEngine

DetectEngineIPOnlyCtx

typedef struct DetectEngineIPOnlyCtx_ DetectEngineIPOnlyCtx

IP only rules matching ctx.

DetectEngineLookupFlow

typedef struct DetectEngineLookupFlow_ DetectEngineLookupFlow

DetectEngineMasterCtx

typedef struct DetectEngineMasterCtx_ DetectEngineMasterCtx

DetectEnginePktInspectionEngine

typedef struct DetectEnginePktInspectionEngine DetectEnginePktInspectionEngine

DetectEngineTenantMapping

typedef struct DetectEngineTenantMapping_ DetectEngineTenantMapping

DetectEngineThreadCtx

typedef struct DetectEngineThreadCtx_ DetectEngineThreadCtx

Detection engine thread data.

DetectEngineThreadKeywordCtxItem

typedef struct DetectEngineThreadKeywordCtxItem_ DetectEngineThreadKeywordCtxItem

DetectEngineTransforms

typedef struct DetectEngineTransforms DetectEngineTransforms

DetectMatchAddressIPv4

typedef struct DetectMatchAddressIPv4_ DetectMatchAddressIPv4

DetectMatchAddressIPv6

typedef struct DetectMatchAddressIPv6_ DetectMatchAddressIPv6

DetectPatternTracker

typedef struct DetectPatternTracker DetectPatternTracker

DetectPort

typedef struct DetectPort_ DetectPort

Port structure for detection engine.

DetectReplaceList

typedef struct DetectReplaceList_ DetectReplaceList

DetectVarList

typedef struct DetectVarList_ DetectVarList

list for flowvar store candidates, to be stored from post-match function

InspectEngineFuncPtr

typedef uint8_t(* InspectEngineFuncPtr) (struct DetectEngineCtx_ *de_ctx, struct DetectEngineThreadCtx_ *det_ctx, const struct DetectEngineAppInspectionEngine_ *engine, const struct Signature_ *s, Flow *f, uint8_t flags, void *alstate, void *txv, uint64_t tx_id)

Definition at line 424 of file detect.h.

InspectionBuffer

typedef struct InspectionBuffer InspectionBuffer

InspectionBufferFrameInspectFunc

typedef int(* InspectionBufferFrameInspectFunc) (struct DetectEngineThreadCtx_ *, const struct DetectEngineFrameInspectionEngine *engine, const struct Signature_ *s, Packet *p, const struct Frames *frames, const struct Frame *frame)

Parameters

alert_flags[out]

for setting PACKET_ALERT_FLAG_*

Definition at line 507 of file detect.h.

InspectionBufferGetDataPtr

typedef InspectionBuffer*(* InspectionBufferGetDataPtr) (struct DetectEngineThreadCtx_ *det_ctx, const DetectEngineTransforms *transforms, Flow *f, const uint8_t flow_flags, void *txv, const int list_id)

callback for getting the buffer we need to prefilter/inspect

Definition at line 414 of file detect.h.

InspectionBufferGetPktDataPtr

typedef InspectionBuffer*(* InspectionBufferGetPktDataPtr) (struct DetectEngineThreadCtx_ *det_ctx, const DetectEngineTransforms *transforms, Packet *p, const int list_id)

callback for getting the buffer we need to prefilter/inspect

Definition at line 481 of file detect.h.

InspectionBufferMultipleForList

typedef struct InspectionBufferMultipleForList InspectionBufferMultipleForList

InspectionBufferPktInspectFunc

typedef int(* InspectionBufferPktInspectFunc) (struct DetectEngineThreadCtx_ *, const struct DetectEnginePktInspectionEngine *engine, const struct Signature_ *s, Packet *p, uint8_t *alert_flags)

Parameters

alert_flags[out]

for setting PACKET_ALERT_FLAG_*

Definition at line 474 of file detect.h.

InspectionMultiBufferGetDataPtr

typedef InspectionBuffer*(* InspectionMultiBufferGetDataPtr) (struct DetectEngineThreadCtx_ *det_ctx, const DetectEngineTransforms *transforms, Flow *f, const uint8_t flow_flags, void *txv, const int list_id, const uint32_t local_id)

Definition at line 419 of file detect.h.

IPOnlyCIDRItem

typedef struct IPOnlyCIDRItem_ IPOnlyCIDRItem

MpmStore

typedef struct MpmStore_ MpmStore

PrefilterEngine

typedef struct PrefilterEngine_ PrefilterEngine

PrefilterEngineList

typedef struct PrefilterEngineList_ PrefilterEngineList

PrefilterFrameFn

typedef void(* PrefilterFrameFn) (DetectEngineThreadCtx *det_ctx, const void *pectx, Packet *p, const struct Frames *frames, const struct Frame *frame)

Definition at line 1364 of file detect.h.

PrefilterPktFn

typedef void(* PrefilterPktFn) (DetectEngineThreadCtx *det_ctx, Packet *p, const void *pectx)

Definition at line 1363 of file detect.h.

PrefilterTxFn

typedef void(* PrefilterTxFn) (DetectEngineThreadCtx *det_ctx, const void *pectx, Packet *p, Flow *f, void *tx, const uint64_t tx_id, const AppLayerTxData *tx_data, const uint8_t flags)

Definition at line 1368 of file detect.h.

RuleMatchCandidateTx

typedef struct RuleMatchCandidateTx RuleMatchCandidateTx

array of TX inspect rule candidates

SCDetectRequiresStatus

typedef struct SCDetectRequiresStatus SCDetectRequiresStatus

Definition at line 1 of file detect.h.

SCFPSupportSMList

typedef struct SCFPSupportSMList_ SCFPSupportSMList

SigFileLoaderStat

typedef struct SigFileLoaderStat_ SigFileLoaderStat

Signature loader statistics.

SigGroupHead

typedef struct SigGroupHead_ SigGroupHead

Container for matching data for a signature group.

SigGroupHeadInitData

typedef struct SigGroupHeadInitData_ SigGroupHeadInitData

SigMatch

typedef struct SigMatch_ SigMatch

a single match condition for a signature

SigMatchCtx

typedef struct SigMatchCtx_ SigMatchCtx

Used to start a pointer to SigMatch context Should never be dereferenced without casting to something else.

SigMatchData

typedef struct SigMatchData_ SigMatchData

Data needed for Match()

Signature

typedef struct Signature_ Signature

Signature container.

SignatureInitData

typedef struct SignatureInitData_ SignatureInitData

SignatureInitDataBuffer

typedef struct SignatureInitDataBuffer_ SignatureInitDataBuffer

SignatureNonPrefilterStore

typedef struct SignatureNonPrefilterStore_ SignatureNonPrefilterStore

SigString

typedef struct SigString_ SigString

SigTableElmt

typedef struct SigTableElmt_ SigTableElmt

element in sigmatch type table.

TransformData

typedef struct TransformData_ TransformData

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
ADDRESS_ER	error e.g. compare ipv4 and ipv6
ADDRESS_LT	smaller [aaa] [bbb]
ADDRESS_LE	smaller with overlap [aa[bab]bb]
ADDRESS_EQ	exactly equal [abababab]
ADDRESS_ES	within [bb[aaa]bb] and [[abab]bbb] and [bbb[abab]]
ADDRESS_EB	completely overlaps [aa[bbb]aa] and [[baba]aaa] and [aaa[baba]]
ADDRESS_GE	bigger with overlap [bb[aba]aa]
ADDRESS_GT	bigger [bbb] [aaa]

Definition at line 148 of file detect.h.

anonymous enum

anonymous enum

Enumerator
PORT_ER
PORT_LT
PORT_LE
PORT_EQ
PORT_ES
PORT_EB
PORT_GE
PORT_GT

Definition at line 201 of file detect.h.

anonymous enum

anonymous enum

Enumerator
ENGINE_PROFILE_UNKNOWN
ENGINE_PROFILE_LOW
ENGINE_PROFILE_MEDIUM
ENGINE_PROFILE_HIGH
ENGINE_PROFILE_CUSTOM

Definition at line 1051 of file detect.h.

anonymous enum

anonymous enum

Enumerator
ENGINE_SGH_MPM_FACTORY_CONTEXT_FULL
ENGINE_SGH_MPM_FACTORY_CONTEXT_SINGLE
ENGINE_SGH_MPM_FACTORY_CONTEXT_AUTO

Definition at line 1060 of file detect.h.

anonymous enum

anonymous enum

Enumerator
FILE_DECODER_EVENT_NO_MEM
FILE_DECODER_EVENT_INVALID_SWF_LENGTH
FILE_DECODER_EVENT_INVALID_SWF_VERSION
FILE_DECODER_EVENT_Z_DATA_ERROR
FILE_DECODER_EVENT_Z_STREAM_ERROR
FILE_DECODER_EVENT_Z_BUF_ERROR
FILE_DECODER_EVENT_Z_UNKNOWN_ERROR
FILE_DECODER_EVENT_LZMA_IO_ERROR
FILE_DECODER_EVENT_LZMA_HEADER_TOO_SHORT_ERROR
FILE_DECODER_EVENT_LZMA_DECODER_ERROR
FILE_DECODER_EVENT_LZMA_MEMLIMIT_ERROR
FILE_DECODER_EVENT_LZMA_XZ_ERROR
FILE_DECODER_EVENT_LZMA_UNKNOWN_ERROR
DETECT_EVENT_TOO_MANY_BUFFERS

Definition at line 1312 of file detect.h.

DetectBufferMpmType

enum DetectBufferMpmType

Enumerator
DETECT_BUFFER_MPM_TYPE_PKT
DETECT_BUFFER_MPM_TYPE_APP
DETECT_BUFFER_MPM_TYPE_FRAME
DETECT_BUFFER_MPM_TYPE_SIZE

Definition at line 676 of file detect.h.

DetectEnginePrefilterSetting

enum DetectEnginePrefilterSetting

Enumerator
DETECT_PREFILTER_MPM	use only mpm / fast_pattern
DETECT_PREFILTER_AUTO	use mpm + keyword prefilters

Definition at line 815 of file detect.h.

DetectEngineTenantSelectors

enum DetectEngineTenantSelectors

Enumerator
TENANT_SELECTOR_UNKNOWN	not set
TENANT_SELECTOR_DIRECT	method provides direct tenant id
TENANT_SELECTOR_VLAN	map vlan to tenant id
TENANT_SELECTOR_LIVEDEV	map livedev to tenant id

Definition at line 1518 of file detect.h.

DetectEngineType

enum DetectEngineType

Enumerator
DETECT_ENGINE_TYPE_NORMAL
DETECT_ENGINE_TYPE_DD_STUB
DETECT_ENGINE_TYPE_MT_STUB
DETECT_ENGINE_TYPE_TENANT

Definition at line 821 of file detect.h.

DetectSigmatchListEnum

enum DetectSigmatchListEnum

Enumerator
DETECT_SM_LIST_MATCH
DETECT_SM_LIST_PMATCH
DETECT_SM_LIST_BASE64_DATA
DETECT_SM_LIST_POSTMATCH
DETECT_SM_LIST_TMATCH	post-detection tagging
DETECT_SM_LIST_SUPPRESS
DETECT_SM_LIST_THRESHOLD
DETECT_SM_LIST_MAX
DETECT_SM_LIST_DYNAMIC_START

Definition at line 112 of file detect.h.

MpmBuiltinBuffers

enum MpmBuiltinBuffers

Enumerator
MPMB_TCP_PKT_TS
MPMB_TCP_PKT_TC
MPMB_TCP_STREAM_TS
MPMB_TCP_STREAM_TC
MPMB_UDP_TS
MPMB_UDP_TC
MPMB_OTHERIP
MPMB_MAX

Definition at line 1339 of file detect.h.

SignaturePropertyFlowAction

enum SignaturePropertyFlowAction

Enumerator
SIG_PROP_FLOW_ACTION_PACKET
SIG_PROP_FLOW_ACTION_FLOW
SIG_PROP_FLOW_ACTION_FLOW_IF_STATEFUL

Definition at line 80 of file detect.h.

SignatureType

enum SignatureType

Enumerator
SIG_TYPE_NOT_SET
SIG_TYPE_IPONLY
SIG_TYPE_LIKE_IPONLY
SIG_TYPE_PDONLY	Proto detect only signature. Inspected once per direction when protocol detection is done.
SIG_TYPE_DEONLY
SIG_TYPE_PKT
SIG_TYPE_PKT_STREAM
SIG_TYPE_STREAM
SIG_TYPE_APPLAYER
SIG_TYPE_APP_TX
SIG_TYPE_MAX

Definition at line 62 of file detect.h.

Function Documentation

Detect()

TmEcode Detect	(	ThreadVars *	tv,
		Packet *	p,
		void *	data
	)

Detection engine thread wrapper.

Remember to add the options in SignatureIsIPOnly() at detect.c otherwise it wont be part of a signature group

Parameters

tv	thread vars
p	packet to inspect
data	thread specific data
pq	packet queue

Return values

TM_ECODE_FAILED	error
TM_ECODE_OK	ok

Definition at line 1859 of file detect.c.

DetectEngineSetEvent()

void DetectEngineSetEvent	(	DetectEngineThreadCtx *	det_ctx,
		uint8_t	e
	)

Definition at line 4973 of file detect-engine.c.

References AppLayerDecoderEventsSetEventRaw(), DetectEngineThreadCtx_::decoder_events, and DetectEngineThreadCtx_::events.

Referenced by FileSwfDecompression(), FileSwfLzmaDecompression(), FileSwfZlibDecompression(), and InspectionBufferMultipleForListGet().

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DetectFlowbitsAnalyze()

int DetectFlowbitsAnalyze

(

DetectEngineCtx *

de_ctx

)

Definition at line 420 of file detect-flowbits.c.

References SignatureInitData_::buffer_index, DetectFlowbitsData_::cmd, FBAnalyze::cnts, de_ctx, DETECT_FLOWBITS, DETECT_FLOWBITS_CMD_ISNOTSET, DETECT_FLOWBITS_CMD_ISSET, DETECT_FLOWBITS_CMD_SET, DETECT_FLOWBITS_CMD_TOGGLE, DETECT_FLOWBITS_CMD_UNSET, DETECT_SM_LIST_MATCH, DETECT_SM_LIST_POSTMATCH, Signature_::id, DetectFlowbitsData_::idx, Signature_::init_data, SignatureInitData_::init_flags, FBAnalyze::isnotset_sids, FBAnalyze::isnotset_sids_idx, FBAnalyze::isnotset_sids_size, FBAnalyze::isset_sids, FBAnalyze::isset_sids_idx, FBAnalyze::isset_sids_size, MAX, DetectEngineCtx_::max_fb_id, MAX_SIDS, SigMatch_::next, Signature_::num, DetectFlowbitsData_::or_list, DetectFlowbitsData_::or_list_size, rule_engine_analysis_set, SCCalloc, SCLogDebug, SCLogError, SCLogWarning, SCRealloc, FBAnalyze::set_sids, FBAnalyze::set_sids_idx, FBAnalyze::set_sids_size, DetectEngineCtx_::sig_array, DetectEngineCtx_::sig_array_len, SIG_FLAG_INIT_STATE_MATCH, SignatureInitData_::smlists, FBAnalyze::state_cnts, FBAnalyze::toggle_sids, FBAnalyze::toggle_sids_idx, FBAnalyze::toggle_sids_size, FBAnalyze::unset_sids, FBAnalyze::unset_sids_idx, FBAnalyze::unset_sids_size, VAR_TYPE_FLOW_BIT, and VarNameStoreSetupLookup().

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DetectGetInnerTx()

void* DetectGetInnerTx	(	void *	tx_ptr,
		AppProto	alproto,
		AppProto	engine_alproto,
		uint8_t	flow_flags
	)

Definition at line 1067 of file detect.c.

References ALPROTO_DNS, ALPROTO_DOH2, ALPROTO_HTTP2, and unlikely.

Referenced by AlertJsonDoh2(), and DetectRunPrefilterTx().

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DetectLoadCompleteSigPath()

char* DetectLoadCompleteSigPath	(	const DetectEngineCtx *	de_ctx,
		const char *	sig_file
	)

Create the path if default-rule-path was specified.

Parameters

sig_file

The name of the file

Return values

str	Pointer to the string path + sig_file

Definition at line 62 of file detect-engine-loader.c.

References ConfGetNode(), DetectEngineCtx_::config_prefix, de_ctx, ConfNode_::final, PathIsRelative(), PathMergeAlloc(), SCLogError, SCStrdup, unlikely, and ConfNode_::val.

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DetectMetadataHashFree()

void DetectMetadataHashFree

(

DetectEngineCtx *

de_ctx

)

Definition at line 80 of file detect-metadata.c.

References de_ctx, HashTableFree(), and DetectEngineCtx_::metadata_table.

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DetectMetadataHashInit()

int DetectMetadataHashInit

(

DetectEngineCtx *

de_ctx

)

Definition at line 69 of file detect-metadata.c.

References de_ctx, DetectEngineMustParseMetadata(), HashTableInit(), DetectEngineCtx_::metadata_table, StringHashCompareFunc(), StringHashFreeFunc(), and StringHashFunc().

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DetectRegisterThreadCtxFuncs()

int DetectRegisterThreadCtxFuncs	(	DetectEngineCtx *	de_ctx,
		const char *	name,
		void *(*)(void *)	InitFunc,
		void *	data,
		void(*)(void *)	FreeFunc,
		int	mode
	)

Register Thread keyword context Funcs.

Parameters

de_ctx	detection engine to register in
name	keyword name for error printing
InitFunc	function ptr
data	keyword init data to pass to Func. Can be NULL.
FreeFunc	function ptr
mode	0 normal (ctx per keyword instance) 1 shared (one ctx per det_ct)

Return values

id	for retrieval of ctx at runtime
-1	on error

Note

make sure "data" remains valid and it free'd elsewhere. It's recommended to store it in the keywords global ctx so that it's freed when the de_ctx is freed.

Definition at line 3631 of file detect-engine.c.

References BUG_ON, de_ctx, HashListTableInit(), and DetectEngineCtx_::keyword_hash.

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DetectThreadCtxGetKeywordThreadCtx()

void* DetectThreadCtxGetKeywordThreadCtx	(	DetectEngineThreadCtx *	det_ctx,
		int	id
	)

Retrieve thread local keyword ctx by id.

Parameters

det_ctx	detection engine thread ctx to retrieve the ctx from
id	id of the ctx returned by DetectRegisterThreadCtxInitFunc at keyword init.

Return values

ctx	or NULL on error

Definition at line 3701 of file detect-engine.c.

References DetectEngineThreadCtx_::keyword_ctxs_array, and DetectEngineThreadCtx_::keyword_ctxs_size.

Referenced by DetectLuaMatchBuffer(), and DetectPcrePayloadMatch().

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DetectUnregisterThreadCtxFuncs()

int DetectUnregisterThreadCtxFuncs	(	DetectEngineCtx *	de_ctx,
		void *	data,
		const char *	name
	)

Remove Thread keyword context registration.

Parameters

de_ctx	detection engine to deregister from
det_ctx	detection engine thread context to deregister from
data	keyword init data to pass to Func. Can be NULL.
name	keyword name for error printing

Return values

1	Item unregistered
0	otherwise

Note

make sure "data" remains valid and it free'd elsewhere. It's recommended to store it in the keywords global ctx so that it's freed when the de_ctx is freed.

Definition at line 3683 of file detect-engine.c.

References DetectEngineThreadKeywordCtxItem_::data, de_ctx, HashListTableRemove(), and DetectEngineCtx_::keyword_hash.

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DisableDetectFlowFileFlags()

void DisableDetectFlowFileFlags

(

Flow *

f

)

disable file features we don't need Called if we have no detection engine.

Definition at line 1928 of file detect.c.

DumpPatterns()

void DumpPatterns

(

DetectEngineCtx *

de_ctx

)

Definition at line 1313 of file detect-engine-analyzer.c.

References DetectEngineCtx_::buffer_type_id, DetectPatternTracker::cd, DetectPatternTracker::cnt, ConfigGetLogDirectory(), DetectContentData_::content_len, de_ctx, DETECT_CONTENT_DEPTH, DETECT_CONTENT_ENDS_WITH, DETECT_CONTENT_NEGATED, DETECT_CONTENT_NOCASE, DETECT_CONTENT_OFFSET, DETECT_SM_LIST_DYNAMIC_START, DetectContentPatternPrettyPrint(), DetectEngineBufferTypeGetNameById(), DetectListToHumanString(), DetectEngineCtx_::ea, EngineAnalysisCtx_::file_prefix, DetectContentData_::flags, g_rules_analyzer_write_m, HashListTableFree(), HashListTableGetListData, HashListTableGetListHead(), HashListTableGetListNext, DetectPatternTracker::mpm, DetectEngineCtx_::pattern_hash_table, SCMutexLock, SCMutexUnlock, DetectPatternTracker::sm_list, and str.

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RuleMatchCandidateTxArrayFree()

void RuleMatchCandidateTxArrayFree

(

DetectEngineThreadCtx *

det_ctx

)

Definition at line 1000 of file detect.c.

References SCFree, DetectEngineThreadCtx_::tx_candidates, and DetectEngineThreadCtx_::tx_candidates_size.

RuleMatchCandidateTxArrayInit()

void RuleMatchCandidateTxArrayInit	(	DetectEngineThreadCtx *	det_ctx,
		uint32_t	size
	)

Definition at line 987 of file detect.c.

References DEBUG_VALIDATE_BUG_ON, FatalError, SCCalloc, SCLogDebug, DetectEngineThreadCtx_::tx_candidates, and DetectEngineThreadCtx_::tx_candidates_size.

SigFindSignatureBySidGid()

Signature* SigFindSignatureBySidGid	(	DetectEngineCtx *	de_ctx,
		uint32_t	sid,
		uint32_t	gid
	)

Find a specific signature by sid and gid.

Parameters

de_ctx	detection engine ctx
sid	the signature id
gid	the signature group id

Return values

s	sig found
NULL	sig not found

Definition at line 79 of file detect-engine-build.c.

References de_ctx, Signature_::next, and DetectEngineCtx_::sig_list.

SigLoadSignatures()

int SigLoadSignatures	(	DetectEngineCtx *	de_ctx,
		char *	sig_file,
		bool	sig_file_exclusive
	)

Load signatures.

Parameters

de_ctx	Pointer to the detection engine context
sig_file	Filename (or pattern) holding signatures
sig_file_exclusive	File passed in 'sig_file' should be loaded exclusively.

Return values

-1

on error

Definition at line 287 of file detect-engine-loader.c.

References DetectEngineCtx_::config_prefix, de_ctx, RUNMODE_ENGINE_ANALYSIS, SCEnter, SCRunmodeGet(), SetupEngineAnalysis(), and DetectEngineCtx_::sig_stat.

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SigMatchAlloc()

SigMatch* SigMatchAlloc

(

void

)

Definition at line 322 of file detect-parse.c.

References SigMatch_::next, SigMatch_::prev, SCCalloc, and unlikely.

SigMatchFree()

void SigMatchFree	(	DetectEngineCtx *	de_ctx,
		SigMatch *	sm
	)

free a SigMatch

Parameters

sm	SigMatch to free.

free the ctx, for that we call the Free func

Definition at line 336 of file detect-parse.c.

References SigMatch_::ctx, de_ctx, SigTableElmt_::Free, SCFree, sigmatch_table, and SigMatch_::type.

Referenced by DetectIPProtoRemoveAllSMs(), and SigFree().

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SigMatchSignatures()

void SigMatchSignatures	(	ThreadVars *	th_v,
		DetectEngineCtx *	de_ctx,
		DetectEngineThreadCtx *	det_ctx,
		Packet *	p
	)

wrapper for old tests

Definition at line 1938 of file detect.c.

References Packet_::flow.

Referenced by UTHMatchPackets(), UTHMatchPacketsWithResults(), UTHPacketMatchSig(), and UTHPacketMatchSigMpm().

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SigMatchSignaturesGetSgh()

const SigGroupHead* SigMatchSignaturesGetSgh	(	const DetectEngineCtx *	de_ctx,
		const Packet *	p
	)

Get the SigGroupHead for a packet.

Parameters

de_ctx	detection engine context
p	packet

Return values

sgh	the SigGroupHead or NULL if non applies to the packet

Definition at line 220 of file detect.c.

References PacketEngineEvents_::cnt, de_ctx, DetectEngineCtx_::decoder_event_sgh, Packet_::events, Packet_::proto, SCEnter, and SCReturnPtr.

SignatureIsIPOnly()

int SignatureIsIPOnly	(	DetectEngineCtx *	de_ctx,
		const Signature *	s
	)

Test is a initialized signature is IP only.

Parameters

de_ctx	detection engine ctx
s	the signature

Return values

1	sig is ip only
2	sig is like ip only
0	sig is not ip only

Definition at line 209 of file detect-engine-build.c.

References Signature_::alproto, ALPROTO_UNKNOWN, DETECT_SM_LIST_PMATCH, Signature_::flags, Signature_::init_data, SIG_FLAG_APPLAYER, SIG_FLAG_TOCLIENT, SIG_FLAG_TOSERVER, and SignatureInitData_::smlists.

SigRegisterTests()

void SigRegisterTests

(

void

)

Definition at line 4961 of file detect.c.

References IPOnlyRegisterTests(), SigParseRegisterTests(), and UtRegisterTest().

Here is the call graph for this function:

Variable Documentation

sigmatch_table

SigTableElmt* sigmatch_table

Definition at line 127 of file detect-parse.c.

Referenced by DetectAckRegister(), DetectAppLayerEventRegister(), DetectAppLayerMpmRegisterByParentId(), DetectAppLayerProtocolRegister(), DetectAsn1Register(), DetectBase64DataRegister(), DetectBase64DecodeRegister(), DetectBsizeRegister(), DetectBypassRegister(), DetectByteExtractRegister(), DetectBytejumpRegister(), DetectBytemathRegister(), DetectBytetestRegister(), DetectClasstypeRegister(), DetectConfigRegister(), DetectContentRegister(), DetectCsumRegister(), DetectDatarepRegister(), DetectDatasetRegister(), DetectDceIfaceRegister(), DetectDceOpnumRegister(), DetectDceStubDataRegister(), DetectDepthRegister(), DetectDetectionFilterRegister(), DetectDistanceRegister(), DetectDnsAnswerNameRegister(), DetectDnsOpcodeRegister(), DetectDnsQueryNameRegister(), DetectDnsQueryRegister(), DetectDnsRcodeRegister(), DetectDnsRrtypeRegister(), DetectDsizeRegister(), DetectEngineAppInspectionEngineSignatureFree(), DetectEngineBufferTypeValidateTransform(), DetectEngineContentModifierBufferSetup(), DetectEngineEventRegister(), DetectEngineInspectGenericList(), DetectFastPatternRegister(), DetectFiledataRegister(), DetectFilemagicRegister(), DetectFileMd5Register(), DetectFilenameRegister(), DetectFileSha1Register(), DetectFileSha256Register(), DetectFilesizeRegister(), DetectFilestoreRegister(), DetectFlagsRegister(), DetectFlowAgeRegister(), DetectFlowbitsRegister(), DetectFlowBytesToClientRegister(), DetectFlowBytesToServerRegister(), DetectFlowintRegister(), DetectFlowPktsToClientRegister(), DetectFlowPktsToServerRegister(), DetectFlowRegister(), DetectFlowvarRegister(), DetectFragBitsRegister(), DetectFragOffsetRegister(), DetectFrameRegister(), DetectFtpbounceRegister(), DetectFtpdataRegister(), DetectGeoipRegister(), DetectGidRegister(), DetectHelperKeywordRegister(), DetectHelperTransformRegister(), DetectHostbitsRegister(), DetectHttp2Register(), DetectHttpClientBodyRegister(), DetectHttpCookieRegister(), DetectHttpHeaderNamesRegister(), DetectHttpHeaderRegister(), DetectHttpHHRegister(), DetectHttpMethodRegister(), DetectHttpProtocolRegister(), DetectHttpRawHeaderRegister(), DetectHttpRequestHeaderRegister(), DetectHttpRequestLineRegister(), DetectHttpResponseHeaderRegister(), DetectHttpResponseLineRegister(), DetectHttpServerBodyRegister(), DetectHttpStartRegister(), DetectHttpStatCodeRegister(), DetectHttpStatMsgRegister(), DetectHttpUARegister(), DetectHttpUriRegister(), DetectIcmpIdRegister(), DetectIcmpSeqRegister(), DetectIcmpv4HdrRegister(), DetectICMPv6hdrRegister(), DetectICMPv6mtuRegister(), DetectICodeRegister(), DetectIdRegister(), DetectIkeChosenSaRegister(), DetectIkeExchTypeRegister(), DetectIkeKeyExchangePayloadLengthRegister(), DetectIkeKeyExchangeRegister(), DetectIkeNoncePayloadLengthRegister(), DetectIkeNonceRegister(), DetectIkeSpiRegister(), DetectIkeVendorRegister(), DetectIPAddrBufferRegister(), DetectIpOptsRegister(), DetectIPProtoRegister(), DetectIPRepRegister(), DetectIpv4hdrRegister(), DetectIpv6hdrRegister(), DetectIsdataatRegister(), DetectITypeRegister(), DetectJa4HashRegister(), DetectKrb5CNameRegister(), DetectKrb5ErrCodeRegister(), DetectKrb5MsgTypeRegister(), DetectKrb5SNameRegister(), DetectKrb5TicketEncryptionRegister(), DetectL3ProtoRegister(), DetectLuaRegister(), DetectMarkRegister(), DetectMetadataRegister(), DetectModbusRegister(), DetectMsgRegister(), DetectNfsProcedureRegister(), DetectNfsVersionRegister(), DetectNoalertRegister(), DetectNocaseRegister(), DetectOffsetRegister(), DetectPcreRegister(), DetectPktDataRegister(), DetectPktvarRegister(), DetectPrefilterRegister(), DetectPriorityRegister(), DetectQuicCyuHashRegister(), DetectQuicCyuStringRegister(), DetectQuicSniRegister(), DetectQuicUaRegister(), DetectQuicVersionRegister(), DetectRawbytesRegister(), DetectReferenceRegister(), DetectReplaceRegister(), DetectRequiresRegister(), DetectRevRegister(), DetectRpcRegister(), DetectSameipRegister(), DetectSeqRegister(), DetectSidRegister(), DetectSipMethodRegister(), DetectSipUriRegister(), DetectSmbNamedPipeRegister(), DetectSmbNtlmsspDomainRegister(), DetectSmbNtlmsspUserRegister(), DetectSmbShareRegister(), DetectSmbVersionRegister(), DetectSshHasshRegister(), DetectSshHasshServerRegister(), DetectSshHasshServerStringRegister(), DetectSshHasshStringRegister(), DetectSshProtocolRegister(), DetectSshSoftwareRegister(), DetectSshSoftwareVersionRegister(), DetectSshVersionRegister(), DetectSslStateRegister(), DetectSslVersionRegister(), DetectStreamSizeRegister(), DetectTagRegister(), DetectTargetRegister(), DetectTcphdrRegister(), DetectTcpmssRegister(), DetectTemplate2Register(), DetectTemplateRegister(), DetectThresholdRegister(), DetectTlsAlpnRegister(), DetectTlsCertChainLenRegister(), DetectTlsCertsRegister(), DetectTlsFingerprintRegister(), DetectTlsIssuerRegister(), DetectTlsJa3HashRegister(), DetectTlsJa3SHashRegister(), DetectTlsJa3SStringRegister(), DetectTlsJa3StringRegister(), DetectTlsRandomBytesRegister(), DetectTlsRandomRegister(), DetectTlsRandomTimeRegister(), DetectTlsRegister(), DetectTlsSerialRegister(), DetectTlsSniRegister(), DetectTlsSubjectAltNameRegister(), DetectTlsSubjectRegister(), DetectTlsValidityRegister(), DetectTlsVersionRegister(), DetectTosRegister(), DetectTransformFromBase64DecodeRegister(), DetectTransformPcrexformRegister(), DetectTtlRegister(), DetectUdphdrRegister(), DetectUricontentRegister(), DetectUrilenRegister(), DetectWindowRegister(), DetectWithinRegister(), DetectXbitsRegister(), EngineAnalysisFP(), EngineAnalysisRules2(), InspectionBufferApplyTransforms(), PrefilterSetupRuleGroup(), SigFree(), SigMatchFree(), SigMatchStrictEnabled(), SigTableApplyStrictCommandLineOption(), SigTableCleanup(), SigTableInit(), SigTableList(), and SigTableRegisterTests().

signature_properties

const struct SignatureProperties signature_properties[SIG_TYPE_MAX]

Definition at line 110 of file detect-engine.c.