detect-parse.c File Reference

#include "suricata-common.h"
#include "detect.h"
#include "detect-engine.h"
#include "detect-engine-address.h"
#include "detect-engine-port.h"
#include "detect-engine-mpm.h"
#include "detect-engine-state.h"
#include "detect-engine-build.h"
#include "detect-content.h"
#include "detect-bsize.h"
#include "detect-isdataat.h"
#include "detect-pcre.h"
#include "detect-uricontent.h"
#include "detect-reference.h"
#include "detect-ipproto.h"
#include "detect-flow.h"
#include "detect-app-layer-protocol.h"
#include "detect-lua.h"
#include "detect-app-layer-event.h"
#include "detect-http-method.h"
#include "pkt-var.h"
#include "host.h"
#include "util-profiling.h"
#include "decode.h"
#include "flow.h"
#include "util-rule-vars.h"
#include "conf.h"
#include "conf-yaml-loader.h"
#include "app-layer.h"
#include "app-layer-protos.h"
#include "app-layer-parser.h"
#include "app-layer-htp.h"
#include "util-classification-config.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
#include "util-debug.h"
#include "string.h"
#include "detect-parse.h"
#include "detect-engine-iponly.h"
#include "detect-engine-file.h"
#include "app-layer-detect-proto.h"
#include "action-globals.h"
#include "util-validate.h"
#include "detect-engine-alert.h"
#include "packet.h"
#include "tests/detect-parse.c"

Include dependency graph for detect-parse.c:

Go to the source code of this file.

Data Structures
struct	SigDuplWrapper_
	Registration table for file handlers. More...
struct	SignatureParser_
struct	FirewallPolicyChain
	Ordered, most-specific-first list of config paths a single policy can be configured at. More...

Macros
#define	FW_POLICY_YAML_PATH_MAX   320
	max length of a firewall.policies YAML config path More...
#define	FW_POLICY_YAML_PATH_NAME_MAX   64
	max length of a single YAML path leaf segment (a hook or sub state name) More...
#define	FW_POLICY_CHAIN_MAX   6
	max number of config paths consulted to resolve one policy More...
#define	CASE_CODE_STRING(E, S)   case E: return S; break
#define	CASE_CODE(E)   case E: return #E
#define	URL   "https://suricata.io/our-story/deprecation-policy/"

Typedefs
typedef struct SigDuplWrapper_	SigDuplWrapper
	Registration table for file handlers. More...
typedef struct SignatureParser_	SignatureParser
typedef struct FirewallPolicyChain	FirewallPolicyChain
	Ordered, most-specific-first list of config paths a single policy can be configured at. More...

Enumerations
enum	DetectFirewallPolicyClass { DETECT_FIREWALL_POLICY_CLASS_PACKET, DETECT_FIREWALL_POLICY_CLASS_APP }

Functions
const char *	DetectListToHumanString (int list)
const char *	DetectListToString (int list)
int	DetectEngineContentModifierBufferSetup (DetectEngineCtx *de_ctx, Signature *s, const char *arg, int sm_type, int sm_list, AppProto alproto)
SigMatch *	SigMatchAlloc (void)
void	SigMatchFree (DetectEngineCtx *de_ctx, SigMatch *sm)
	free a SigMatch More...
bool	SCSigMatchSilentErrorEnabled (const DetectEngineCtx *de_ctx, uint16_t id)
bool	SigMatchStrictEnabled (const enum DetectKeywordId id)
void	SigTableApplyStrictCommandLineOption (const char *str)
SigMatch *	SCSigMatchAppendSMToList (DetectEngineCtx *de_ctx, Signature *s, uint16_t type, SigMatchCtx *ctx, const int list)
	Append a SigMatch to the list type. More...
void	SigMatchRemoveSMFromList (Signature *s, SigMatch *sm, int sm_list)
SigMatch *	DetectGetLastSMFromMpmLists (const DetectEngineCtx *de_ctx, const Signature *s)
	get the last SigMatch from lists that support MPM. More...
SigMatch *	SCDetectGetLastSMFromLists (const Signature *s,...)
	Returns the sm with the largest index (added latest) from the lists passed to us. More...
SigMatch *	DetectGetLastSMByListPtr (const Signature *s, SigMatch *sm_list,...)
	Returns the sm with the largest index (added last) from the list passed to us as a pointer. More...
SigMatch *	DetectGetLastSMByListId (const Signature *s, int list_id,...)
	Returns the sm with the largest index (added last) from the list passed to us as an id. More...
SigMatch *	DetectGetLastSM (const Signature *s)
	Returns the sm with the largest index (added latest) from this sig. More...
int	SigMatchListSMBelongsTo (const Signature *s, const SigMatch *key_sm)
const char *	DetectFirewallAppGenericHookName (const uint8_t state, const uint8_t complete_state, const int direction)
	Generic start/complete hook alias for an app progress state, in config form (hyphens), or NULL for intermediate states. More...
void	DetectRegisterAppLayerHookLists (void)
	register app hooks as generic lists More...
void	DetectListSupportedProtocols (void)
int	SignatureInitDataBufferCheckExpand (Signature *s)
	check if buffers array still has space left, expand if not More...
Signature *	SigAlloc (void)
void	SigFree (DetectEngineCtx *de_ctx, Signature *s)
int	DetectSignatureSetMultiAppProto (Signature *s, const AppProto *alprotos)
	this function is used to set multiple possible app-layer protos More...
int	SCDetectSignatureSetAppProto (Signature *s, AppProto alproto)
SigMatchData *	SigMatchList2DataArray (SigMatch *head)
	convert SigMatch list to SigMatchData array More...
Signature *	SigInit (DetectEngineCtx *de_ctx, const char *sigstr)
	Parses a signature and adds it to the Detection Engine Context. More...
int	DetectParseDupSigHashInit (DetectEngineCtx *de_ctx)
	Initializes the hash table that is used to cull duplicate sigs. More...
void	DetectParseDupSigHashFree (DetectEngineCtx *de_ctx)
	Frees the hash table that is used to cull duplicate sigs. More...
Signature *	DetectFirewallRuleAppendNew (DetectEngineCtx *de_ctx, const char *sigstr)
	Parse and append a Signature into the Detection Engine Context signature list. More...
Signature *	DetectEngineAppendSig (DetectEngineCtx *de_ctx, const char *sigstr)
	Parse and append a Signature into the Detection Engine Context signature list. More...
int	DetectParsePcreExec (DetectParseRegex *parse_regex, pcre2_match_data **match, const char *str, int start_offset, int options)
void	DetectParseFreeRegex (DetectParseRegex *r)
void	DetectParseFreeRegexes (void)
void	DetectParseRegexAddToFreeList (DetectParseRegex *detect_parse)
	add regex and/or study to at exit free list More...
bool	DetectSetupParseRegexesOpts (const char *parse_str, DetectParseRegex *detect_parse, int opts)
DetectParseRegex *	DetectSetupPCRE2 (const char *parse_str, int opts)
int	SC_Pcre2SubstringCopy (pcre2_match_data *match_data, uint32_t number, PCRE2_UCHAR *buffer, PCRE2_SIZE *bufflen)
int	SC_Pcre2SubstringGet (pcre2_match_data *match_data, uint32_t number, PCRE2_UCHAR **bufferptr, PCRE2_SIZE *bufflen)
void	DetectSetupParseRegexes (const char *parse_str, DetectParseRegex *detect_parse)
const char *	ActionScopeToString (enum ActionScope s)
void	DetectFirewallPolicyToString (const struct DetectFirewallPolicy *p, char *out, size_t out_size)
int	DetectFirewallInitDefaultPolicies (DetectEngineCtx *de_ctx)
	allocate and initialize to default values the policies table More...
int	DetectFirewallLoadDefaultPolicies (DetectEngineCtx *de_ctx)
void	DetectParseRegisterTests (void)
	this function registers unit tests for DetectParse More...
void	SigParseRegisterTests (void)

Variables
SigTableElmt *	sigmatch_table = NULL
bool	sc_set_caps
int	g_skip_prefilter

Detailed Description

Author

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

signature parser

Definition in file detect-parse.c.

Macro Definition Documentation

CASE_CODE

#define CASE_CODE

(

E

)

case E: return #E

Definition at line 163 of file detect-parse.c.

CASE_CODE_STRING

#define CASE_CODE_STRING	(		E,
			S
	)		case E: return S; break

FW_POLICY_CHAIN_MAX

#define FW_POLICY_CHAIN_MAX   6

max number of config paths consulted to resolve one policy

Definition at line 135 of file detect-parse.c.

FW_POLICY_YAML_PATH_MAX

#define FW_POLICY_YAML_PATH_MAX   320

max length of a firewall.policies YAML config path

Definition at line 131 of file detect-parse.c.

FW_POLICY_YAML_PATH_NAME_MAX

#define FW_POLICY_YAML_PATH_NAME_MAX   64

max length of a single YAML path leaf segment (a hook or sub state name)

Definition at line 133 of file detect-parse.c.

URL

#define URL   "https://suricata.io/our-story/deprecation-policy/"

Typedef Documentation

FirewallPolicyChain

typedef struct FirewallPolicyChain FirewallPolicyChain

Ordered, most-specific-first list of config paths a single policy can be configured at.

SigDuplWrapper

typedef struct SigDuplWrapper_ SigDuplWrapper

Registration table for file handlers.

We use this as data to the hash table DetectEngineCtx->dup_sig_hash_table.

SignatureParser

typedef struct SignatureParser_ SignatureParser

helper structure for sig parsing

Enumeration Type Documentation

DetectFirewallPolicyClass

enum DetectFirewallPolicyClass

Valid action scopes per firewall hook class.

Enumerator
DETECT_FIREWALL_POLICY_CLASS_PACKET
DETECT_FIREWALL_POLICY_CLASS_APP

Definition at line 113 of file detect-parse.c.

Function Documentation

ActionScopeToString()

const char* ActionScopeToString

(

enum ActionScope

s

)

Definition at line 4067 of file detect-parse.c.

References ACTION_SCOPE_AUTO, ACTION_SCOPE_FLOW, ACTION_SCOPE_HOOK, ACTION_SCOPE_PACKET, ACTION_SCOPE_TX, and DEBUG_VALIDATE_BUG_ON.

Referenced by DetectFirewallPolicyToString().

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DetectEngineAppendSig()

Signature* DetectEngineAppendSig	(	DetectEngineCtx *	de_ctx,
		const char *	sigstr
	)

Parse and append a Signature into the Detection Engine Context signature list.

If the signature is bidirectional it should append two signatures (with the addresses switched) into the list. Also handle duplicate signatures. In case of duplicate sigs, use the ones that have the latest revision. We use the sid and the msg to identify duplicate sigs. If 2 sigs have the same sid and gid, they are duplicates.

Parameters

de_ctx	Pointer to the Detection Engine Context.
sigstr	Pointer to a character string containing the signature to be parsed.
sig_file	Pointer to a character string containing the filename from which signature is read
lineno	Line number from where signature is read

Return values

Pointer

to the head Signature in the detection engine ctx sig_list on success; NULL on failure.

In DetectEngineAppendSig(), the signatures are prepended and we always return the first one so if the signature is bidirectional, the returned sig will point through "next" ptr to the cloned signatures with the switched addresses

Definition at line 3847 of file detect-parse.c.

References de_ctx, and SigInit().

Referenced by UTHAppendSigs(), UTHPacketMatchSig(), UTHPacketMatchSigMpm(), and UTHParseSignature().

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DetectEngineContentModifierBufferSetup()

int DetectEngineContentModifierBufferSetup	(	DetectEngineCtx *	de_ctx,
		Signature *	s,
		const char *	arg,
		int	sm_type,
		int	sm_list,
		AppProto	alproto
	)

Parameters

arg	NULL or empty string

Definition at line 179 of file detect-parse.c.

References Signature_::alproto, ALPROTO_UNKNOWN, DETECT_SM_LIST_NOTSET, Signature_::init_data, SignatureInitData_::list, name, SCLogError, and sigmatch_table.

Referenced by DetectHttpUriSetup().

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DetectFirewallAppGenericHookName()

const char* DetectFirewallAppGenericHookName	(	const uint8_t	state,
		const uint8_t	complete_state,
		const int	direction
	)

Generic start/complete hook alias for an app progress state, in config form (hyphens), or NULL for intermediate states.

Definition at line 1185 of file detect-parse.c.

DetectFirewallInitDefaultPolicies()

int DetectFirewallInitDefaultPolicies

(

DetectEngineCtx *

de_ctx

)

allocate and initialize to default values the policies table

Definition at line 4423 of file detect-parse.c.

References DetectFirewallPolicies::app_policies, HashTableInit(), and SCCalloc.

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DetectFirewallLoadDefaultPolicies()

int DetectFirewallLoadDefaultPolicies

(

DetectEngineCtx *

de_ctx

)

Definition at line 4492 of file detect-parse.c.

References DetectEngineCtx_::config_prefix, de_ctx, and DetectEngineCtx_::fw_policies.

DetectFirewallPolicyToString()

void DetectFirewallPolicyToString	(	const struct DetectFirewallPolicy *	p,
		char *	out,
		size_t	out_size
	)

Definition at line 4085 of file detect-parse.c.

References Packet_::action, ACTION_ACCEPT, ACTION_ALERT, ACTION_DROP, ACTION_PASS, ACTION_REJECT_ANY, ACTION_REJECT_BOTH, ACTION_REJECT_DST, ACTION_SCOPE_FLOW, ActionScopeToString(), DEBUG_VALIDATE_BUG_ON, p, and strlcat().

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DetectFirewallRuleAppendNew()

Signature* DetectFirewallRuleAppendNew	(	DetectEngineCtx *	de_ctx,
		const char *	sigstr
	)

Parse and append a Signature into the Detection Engine Context signature list.

If the signature is bidirectional it should append two signatures (with the addresses switched) into the list. Also handle duplicate signatures. In case of duplicate sigs, use the ones that have the latest revision. We use the sid and the msg to identify duplicate sigs. If 2 sigs have the same sid and gid, they are duplicates.

Parameters

de_ctx	Pointer to the Detection Engine Context.
sigstr	Pointer to a character string containing the signature to be parsed.
sig_file	Pointer to a character string containing the filename from which signature is read
lineno	Line number from where signature is read

Return values

Pointer

to the head Signature in the detection engine ctx sig_list on success; NULL on failure.

In DetectEngineAppendSig(), the signatures are prepended and we always return the first one so if the signature is bidirectional, the returned sig will point through "next" ptr to the cloned signatures with the switched addresses

Definition at line 3775 of file detect-parse.c.

DetectGetLastSM()

SigMatch* DetectGetLastSM

(

const Signature *

s

)

Returns the sm with the largest index (added latest) from this sig.

Return values

sm_last

Pointer to last sm

Definition at line 741 of file detect-parse.c.

References SignatureInitData_::buffer_index, SignatureInitData_::buffers, DETECT_SM_LIST_MAX, SigMatch_::idx, Signature_::init_data, SignatureInitData_::smlists_tail, and SignatureInitDataBuffer_::tail.

DetectGetLastSMByListId()

SigMatch* DetectGetLastSMByListId	(	const Signature *	s,
		int	list_id,
			...
	)

Returns the sm with the largest index (added last) from the list passed to us as an id.

Parameters

list_id	id of the list to be searched
va_args	list of keyword types terminated by -1

Return values

sm_last

to last sm.

Definition at line 690 of file detect-parse.c.

References SignatureInitData_::buffer_index, SignatureInitData_::buffers, DETECT_SM_LIST_MAX, Signature_::init_data, and SignatureInitDataBuffer_::tail.

DetectGetLastSMByListPtr()

SigMatch* DetectGetLastSMByListPtr	(	const Signature *	s,
		SigMatch *	sm_list,
			...
	)

Returns the sm with the largest index (added last) from the list passed to us as a pointer.

Parameters

sm_list	pointer to the SigMatch we should look before
va_args	list of keyword types terminated by -1

Return values

sm_last

to last sm.

Definition at line 658 of file detect-parse.c.

Referenced by DetectGetLastSMFromMpmLists().

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DetectGetLastSMFromMpmLists()

SigMatch* DetectGetLastSMFromMpmLists	(	const DetectEngineCtx *	de_ctx,
		const Signature *	s
	)

get the last SigMatch from lists that support MPM.

Note

only supports the lists that are registered through DetectBufferTypeSupportsMpm().

Definition at line 559 of file detect-parse.c.

References SignatureInitData_::buffer_index, SignatureInitData_::buffers, de_ctx, DETECT_CONTENT, DETECT_SM_LIST_MAX, DetectEngineBufferTypeSupportsMpmGetById(), DetectGetLastSMByListPtr(), SignatureInitDataBuffer_::id, SigMatch_::idx, Signature_::init_data, SignatureInitData_::smlists_tail, and SignatureInitDataBuffer_::tail.

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DetectListSupportedProtocols()

void DetectListSupportedProtocols

(

void

)

Definition at line 1581 of file detect-parse.c.

References AppProtoDetectListNames(), and DetectEngineProtoList().

Referenced by ListRuleProtocols().

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DetectListToHumanString()

const char* DetectListToHumanString

(

int

list

)

Definition at line 145 of file detect-parse.c.

Referenced by DumpPatterns().

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DetectListToString()

const char* DetectListToString

(

int

list

)

Definition at line 163 of file detect-parse.c.

DetectParseDupSigHashFree()

void DetectParseDupSigHashFree

(

DetectEngineCtx *

de_ctx

)

Frees the hash table that is used to cull duplicate sigs.

Parameters

de_ctx

Pointer to the detection engine context that holds this table.

Definition at line 3592 of file detect-parse.c.

References de_ctx, DetectEngineCtx_::dup_sig_hash_table, and HashListTableFree().

Referenced by DetectEngineCtxFree().

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DetectParseDupSigHashInit()

int DetectParseDupSigHashInit

(

DetectEngineCtx *

de_ctx

)

Initializes the hash table that is used to cull duplicate sigs.

Parameters

de_ctx

Pointer to the detection engine context.

Return values

0	On success.
-1	On failure.

Definition at line 3575 of file detect-parse.c.

References de_ctx, DetectEngineCtx_::dup_sig_hash_table, and HashListTableInit().

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DetectParseFreeRegex()

void DetectParseFreeRegex

(

DetectParseRegex *

r

)

Definition at line 3911 of file detect-parse.c.

References DetectParseRegex::context, and DetectParseRegex::regex.

DetectParseFreeRegexes()

void DetectParseFreeRegexes

(

void

)

Definition at line 3921 of file detect-parse.c.

Referenced by GlobalsDestroy().

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DetectParsePcreExec()

int DetectParsePcreExec	(	DetectParseRegex *	parse_regex,
		pcre2_match_data **	match,
		const char *	str,
		int	start_offset,
		int	options
	)

Definition at line 3901 of file detect-parse.c.

DetectParseRegexAddToFreeList()

void DetectParseRegexAddToFreeList

(

DetectParseRegex *

detect_parse

)

add regex and/or study to at exit free list

Definition at line 3937 of file detect-parse.c.

References FatalError, DetectParseRegex::next, DetectParseRegex::regex, and SCCalloc.

Referenced by DetectSetupParseRegexesOpts().

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DetectParseRegisterTests()

void DetectParseRegisterTests

(

void

)

this function registers unit tests for DetectParse

Definition at line 146 of file detect-parse.c.

References UtRegisterTest().

Referenced by SigParseRegisterTests().

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DetectRegisterAppLayerHookLists()

void DetectRegisterAppLayerHookLists

(

void

)

register app hooks as generic lists

Register each hook in each app protocol as: <alproto>:<hook name>:generic These lists can be used by lua scripts to hook into.

Todo:

move elsewhere? maybe a detect-engine-hook.c?

Definition at line 1203 of file detect-parse.c.

References ALPROTO_FAILED, AppLayerParserGetMaxSubState(), AppLayerParserGetSubStateCompletion(), AppLayerParserGetSubStateName(), AppLayerParserGetSubStateProgressName(), AppLayerParserSupportsSubStates(), AppProtoToStringRaw(), BUG_ON, DetectAppLayerInspectEngineRegisterSubState(), DetectEngineInspectGenericList(), g_alproto_max, SCLogDebug, SIG_FLAG_TOCLIENT, and SIG_FLAG_TOSERVER.

Referenced by SigTableSetup().

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DetectSetupParseRegexes()

void DetectSetupParseRegexes	(	const char *	parse_str,
		DetectParseRegex *	detect_parse
	)

Definition at line 4027 of file detect-parse.c.

References DetectSetupParseRegexesOpts(), and FatalError.

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DetectSetupParseRegexesOpts()

bool DetectSetupParseRegexesOpts	(	const char *	parse_str,
		DetectParseRegex *	detect_parse,
		int	opts
	)

Definition at line 3948 of file detect-parse.c.

References DetectParseRegex::context, DetectParseRegexAddToFreeList(), DetectParseRegex::regex, SC_MATCH_LIMIT_DEFAULT, SC_MATCH_LIMIT_RECURSION_DEFAULT, and SCLogError.

Referenced by DetectSetupParseRegexes().

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DetectSetupPCRE2()

DetectParseRegex* DetectSetupPCRE2	(	const char *	parse_str,
		int	opts
	)

Definition at line 3977 of file detect-parse.c.

References DetectParseRegex::next, DetectParseRegex::regex, SCCalloc, SCFree, and SCLogError.

DetectSignatureSetMultiAppProto()

int DetectSignatureSetMultiAppProto	(	Signature *	s,
		const AppProto *	alprotos
	)

this function is used to set multiple possible app-layer protos

into the current signature (for example ja4 for both tls and quic)

Parameters

s	pointer to the Current Signature
alprotos	an array terminated by ALPROTO_UNKNOWN

Return values

0	on Success
-1	on Failure

Definition at line 2428 of file detect-parse.c.

References Signature_::alproto, ALPROTO_UNKNOWN, SignatureInitData_::alprotos, Signature_::init_data, SCDetectSignatureSetAppProto(), and SIG_ALPROTO_MAX.

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SC_Pcre2SubstringCopy()

int SC_Pcre2SubstringCopy	(	pcre2_match_data *	match_data,
		uint32_t	number,
		PCRE2_UCHAR *	buffer,
		PCRE2_SIZE *	bufflen
	)

Definition at line 4003 of file detect-parse.c.

SC_Pcre2SubstringGet()

int SC_Pcre2SubstringGet	(	pcre2_match_data *	match_data,
		uint32_t	number,
		PCRE2_UCHAR **	bufferptr,
		PCRE2_SIZE *	bufflen
	)

Definition at line 4015 of file detect-parse.c.

SCDetectGetLastSMFromLists()

SigMatch* SCDetectGetLastSMFromLists	(	const Signature *	s,
			...
	)

Returns the sm with the largest index (added latest) from the lists passed to us.

Return values

Pointer

to Last sm.

Definition at line 596 of file detect-parse.c.

References SignatureInitData_::buffer_index, SignatureInitData_::buffers, DETECT_SM_LIST_NOTSET, SignatureInitDataBuffer_::id, Signature_::init_data, SignatureInitData_::list, and SCLogDebug.

SCDetectSignatureSetAppProto()

int SCDetectSignatureSetAppProto	(	Signature *	s,
		AppProto	alproto
	)

Definition at line 2506 of file detect-parse.c.

Referenced by DetectSignatureSetMultiAppProto().

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SCSigMatchAppendSMToList()

SigMatch* SCSigMatchAppendSMToList	(	DetectEngineCtx *	de_ctx,
		Signature *	s,
		uint16_t	type,
		SigMatchCtx *	ctx,
		const int	list
	)

Append a SigMatch to the list type.

Parameters

s	Signature.
new	The sig match to append.
list	The list to append to.

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

Referenced by DetectContentSetup(), and DetectFlowvarPostMatchSetup().

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SCSigMatchSilentErrorEnabled()

bool SCSigMatchSilentErrorEnabled	(	const DetectEngineCtx *	de_ctx,
		uint16_t	id
	)

Definition at line 363 of file detect-parse.c.

References de_ctx, and DetectEngineCtx_::sm_types_silent_error.

SigAlloc()

Signature* SigAlloc

(

void

)

Definition at line 2211 of file detect-parse.c.

References SignatureInitData_::buffers, SignatureInitData_::buffers_size, DETECT_SM_LIST_NOTSET, Signature_::init_data, SignatureInitData_::is_rule_state_dependant, SignatureInitData_::list, SignatureInitData_::mpm_sm_list, Signature_::prio, SignatureInitData_::rule_state_dependant_sids_idx, SCCalloc, SCFree, and unlikely.

SigFree()

void SigFree	(	DetectEngineCtx *	de_ctx,
		Signature *	s
	)

Definition at line 2331 of file detect-parse.c.

References SignatureInitData_::buffer_index, SignatureInitData_::buffers, SignatureInitData_::cidr_dst, SignatureInitData_::cidr_src, DetectEngineTransforms::cnt, de_ctx, DETECT_SM_LIST_MAX, SigTableElmt_::Free, SignatureInitDataBuffer_::head, Signature_::init_data, IPOnlyCIDRListFree(), SigMatch_::next, TransformData_::options, SCFree, sigmatch_table, SigMatchFree(), SignatureInitData_::smlists, TransformData_::transform, DetectEngineTransforms::transforms, and SignatureInitData_::transforms.

Referenced by SigCleanSignatures().

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SigInit()

Signature* SigInit	(	DetectEngineCtx *	de_ctx,
		const char *	sigstr
	)

Parses a signature and adds it to the Detection Engine Context.

Parameters

de_ctx	Pointer to the Detection Engine Context.
sigstr	Pointer to a character string containing the signature to be parsed.

Return values

Pointer

to the Signature instance on success; NULL on failure.

Definition at line 3500 of file detect-parse.c.

Referenced by DetectEngineAppendSig().

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SigMatchAlloc()

SigMatch* SigMatchAlloc

(

void

)

Definition at line 307 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 321 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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SigMatchList2DataArray()

SigMatchData* SigMatchList2DataArray

(

SigMatch *

head

)

convert SigMatch list to SigMatchData array

Note

ownership of sm->ctx is transferred to smd->ctx

Definition at line 2642 of file detect-parse.c.

References len.

SigMatchListSMBelongsTo()

int SigMatchListSMBelongsTo	(	const Signature *	s,
		const SigMatch *	key_sm
	)

Definition at line 795 of file detect-parse.c.

References SignatureInitData_::buffer_index, SignatureInitData_::buffers, SignatureInitDataBuffer_::head, SignatureInitDataBuffer_::id, Signature_::init_data, and SigMatch_::next.

SigMatchRemoveSMFromList()

void SigMatchRemoveSMFromList	(	Signature *	s,
		SigMatch *	sm,
		int	sm_list
	)

Definition at line 519 of file detect-parse.c.

References Signature_::init_data, SigMatch_::next, SigMatch_::prev, SignatureInitData_::smlists, and SignatureInitData_::smlists_tail.

Referenced by DetectIPProtoRemoveAllSMs().

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SigMatchStrictEnabled()

bool SigMatchStrictEnabled

(

const enum DetectKeywordId

id

)

Definition at line 368 of file detect-parse.c.

References DETECT_TBLSIZE, flags, SIGMATCH_STRICT_PARSING, and sigmatch_table.

SignatureInitDataBufferCheckExpand()

int SignatureInitDataBufferCheckExpand

(

Signature *

s

)

check if buffers array still has space left, expand if not

Definition at line 2191 of file detect-parse.c.

References SignatureInitData_::buffer_index, SignatureInitData_::buffers, SignatureInitData_::buffers_size, Signature_::init_data, and SCRealloc.

Referenced by DetectBufferGetActiveList().

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SigParseRegisterTests()

void SigParseRegisterTests

(

void

)

Definition at line 6342 of file detect-parse.c.

References DetectParseRegisterTests(), and UtRegisterTest().

Referenced by SigRegisterTests().

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SigTableApplyStrictCommandLineOption()

void SigTableApplyStrictCommandLineOption

(

const char *

str

)

Definition at line 376 of file detect-parse.c.

References DETECT_TBLSIZE, FatalError, SigTableElmt_::flags, SCStrdup, SIGMATCH_STRICT_PARSING, sigmatch_table, and str.

Variable Documentation

g_skip_prefilter

int g_skip_prefilter

Definition at line 1159 of file detect-engine-mpm.c.

sc_set_caps

bool sc_set_caps

set caps or not

Definition at line 193 of file suricata.c.

sigmatch_table

SigTableElmt* sigmatch_table = NULL

Definition at line 79 of file detect-parse.c.

Referenced by DetectAckRegister(), DetectAppLayerEventRegister(), DetectAppLayerProtocolRegister(), DetectAppLayerStateRegister(), DetectAsn1Register(), DetectBase64DataRegister(), DetectBase64DecodeRegister(), DetectBsizeRegister(), DetectBypassRegister(), DetectByteExtractRegister(), DetectBytejumpRegister(), DetectBytemathRegister(), DetectBytetestRegister(), DetectClasstypeRegister(), DetectConfigRegister(), DetectContentRegister(), DetectCsumRegister(), DetectDatarepRegister(), DetectDatasetRegister(), DetectDepthRegister(), DetectDetectionFilterRegister(), DetectDistanceRegister(), DetectDnsResponseRegister(), DetectDsizeRegister(), DetectEngineAppInspectionEngineSignatureFree(), DetectEngineBufferTypeValidateTransform(), DetectEngineContentModifierBufferSetup(), DetectEngineEventRegister(), DetectEngineInspectGenericList(), DetectEntropyRegister(), DetectEtherhdrRegister(), DetectFastPatternRegister(), DetectFiledataRegister(), DetectFilemagicRegister(), DetectFileMd5Register(), DetectFilenameRegister(), DetectFileSha1Register(), DetectFileSha256Register(), DetectFilesizeRegister(), DetectFilestoreRegister(), DetectFlagsRegister(), DetectFlowAgeRegister(), DetectFlowbitsRegister(), DetectFlowBytesRegister(), DetectFlowBytesToClientRegister(), DetectFlowBytesToServerRegister(), DetectFlowElephantRegister(), DetectFlowintRegister(), DetectFlowPktsRegister(), DetectFlowPktsToClientRegister(), DetectFlowPktsToServerRegister(), DetectFlowRegister(), DetectFlowvarRegister(), DetectFragBitsRegister(), DetectFragOffsetRegister(), DetectFrameRegister(), DetectFtpbounceRegister(), DetectFtpCommandDataRegister(), DetectFtpCommandRegister(), DetectFtpCompletionCodeRegister(), DetectFtpdataRegister(), DetectFtpDynamicPortRegister(), DetectFtpModeRegister(), DetectFtpReplyReceivedRegister(), DetectFtpReplyRegister(), DetectGeoipRegister(), DetectGidRegister(), 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(), DetectIGMPHdrRegister(), DetectIGMPTypeRegister(), DetectIPAddrBufferRegister(), DetectIpOptsRegister(), DetectIPProtoRegister(), DetectIPRepRegister(), DetectIpv4hdrRegister(), DetectIpv6hdrRegister(), DetectIsdataatRegister(), DetectITypeRegister(), DetectJa4HashRegister(), DetectL3ProtoRegister(), DetectLuaRegister(), DetectMarkRegister(), DetectMetadataRegister(), DetectMsgRegister(), DetectNoalertRegister(), DetectNocaseRegister(), DetectOffsetRegister(), DetectPcreRegister(), DetectPktDataRegister(), DetectPktvarRegister(), DetectPrefilterRegister(), DetectPriorityRegister(), DetectRawbytesRegister(), DetectReferenceRegister(), DetectReplaceRegister(), DetectRequiresRegister(), DetectRevRegister(), DetectRpcRegister(), DetectSameipRegister(), DetectSCTPChunkCntRegister(), DetectSCTPChunkDataRegister(), DetectSCTPChunkTypeRegister(), DetectSCTPHdrRegister(), DetectSCTPVtagRegister(), DetectSeqRegister(), DetectSidRegister(), DetectSipMethodRegister(), DetectSipUriRegister(), DetectSslStateRegister(), DetectSslVersionRegister(), DetectStreamSizeRegister(), DetectTagRegister(), DetectTargetRegister(), DetectTcphdrRegister(), DetectTcpmssRegister(), DetectTcpSessionRegister(), DetectTcpWscaleRegister(), DetectTemplateRegister(), DetectThresholdRegister(), DetectTlsAlpnRegister(), DetectTlsCertChainLenRegister(), DetectTlsCertsRegister(), DetectTlsFingerprintRegister(), DetectTlsIssuerRegister(), DetectTlsJa3HashRegister(), DetectTlsJa3SHashRegister(), DetectTlsJa3SStringRegister(), DetectTlsJa3StringRegister(), DetectTlsRandomBytesRegister(), DetectTlsRandomRegister(), DetectTlsRandomTimeRegister(), DetectTlsRegister(), DetectTlsSerialRegister(), DetectTlsSniRegister(), DetectTlsSubjectAltNameRegister(), DetectTlsSubjectRegister(), DetectTlsValidityRegister(), DetectTlsVersionRegister(), DetectTosRegister(), DetectTransformLuaxformRegister(), DetectTransformPcrexformRegister(), DetectTtlRegister(), DetectUdphdrRegister(), DetectUricontentRegister(), DetectUrilenRegister(), DetectVlanIdRegister(), DetectVlanLayersRegister(), DetectWindowRegister(), DetectWithinRegister(), DetectXbitsRegister(), EngineAnalysisFP(), EngineAnalysisRules2(), PrefilterSetupRuleGroup(), SCDetectHelperKeywordAliasRegister(), SCDetectHelperKeywordRegister(), SCDetectHelperKeywordSetCleanCString(), SCDetectHelperNewKeywordId(), SCDetectHelperTransformRegister(), SCSigTableHasKeyword(), SigFree(), SigMatchFree(), SigMatchStrictEnabled(), SigTableApplyStrictCommandLineOption(), SigTableCleanup(), SigTableInit(), SigTableList(), and SigTableRegisterTests().