detect-bytetest.h File Reference

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Data Structures
struct	DetectBytetestData_

Macros
#define	DETECT_BYTETEST_OP_LT   1
#define	DETECT_BYTETEST_OP_GT   2
#define	DETECT_BYTETEST_OP_EQ   3
#define	DETECT_BYTETEST_OP_AND   4
#define	DETECT_BYTETEST_OP_OR   5
#define	DETECT_BYTETEST_OP_GE   6
#define	DETECT_BYTETEST_OP_LE   7
#define	DETECT_BYTETEST_BASE_UNSET   0
#define	DETECT_BYTETEST_BASE_OCT   8
#define	DETECT_BYTETEST_BASE_DEC   10
#define	DETECT_BYTETEST_BASE_HEX   16
#define	DETECT_BYTETEST_LITTLE   BIT_U8(0)
#define	DETECT_BYTETEST_BIG   BIT_U8(1)
#define	DETECT_BYTETEST_STRING   BIT_U8(2)
#define	DETECT_BYTETEST_RELATIVE   BIT_U8(3)
#define	DETECT_BYTETEST_DCE   BIT_U8(4)
#define	DETECT_BYTETEST_BITMASK   BIT_U8(5)
#define	DETECT_BYTETEST_VALUE_BE   BIT_U8(6)
#define	DETECT_BYTETEST_OFFSET_BE   BIT_U8(7)

Typedefs
typedef struct DetectBytetestData_	DetectBytetestData

Functions
void	DetectBytetestRegister (void)
int	DetectBytetestDoMatch (DetectEngineThreadCtx *, const Signature *, const SigMatchCtx *ctx, const uint8_t *, uint32_t, uint8_t, int32_t, uint64_t)
	Bytetest detection code. More...

Detailed Description

Author

Brian Rectanus brect.nosp@m.anu@.nosp@m.gmail.nosp@m..com

Definition in file detect-bytetest.h.

Macro Definition Documentation

DETECT_BYTETEST_BASE_DEC

#define DETECT_BYTETEST_BASE_DEC   10

"dec" type value string

Definition at line 40 of file detect-bytetest.h.

DETECT_BYTETEST_BASE_HEX

#define DETECT_BYTETEST_BASE_HEX   16

"hex" type value string

Definition at line 41 of file detect-bytetest.h.

DETECT_BYTETEST_BASE_OCT

#define DETECT_BYTETEST_BASE_OCT   8

"oct" type value string

Definition at line 39 of file detect-bytetest.h.

DETECT_BYTETEST_BASE_UNSET

#define DETECT_BYTETEST_BASE_UNSET   0

Bytetest Base Unset type value string (automatic)

Definition at line 38 of file detect-bytetest.h.

DETECT_BYTETEST_BIG

#define DETECT_BYTETEST_BIG   BIT_U8(1)

"bi" endian value

Definition at line 45 of file detect-bytetest.h.

DETECT_BYTETEST_BITMASK

#define DETECT_BYTETEST_BITMASK   BIT_U8(5)

bitmask supplied

Definition at line 49 of file detect-bytetest.h.

DETECT_BYTETEST_DCE

#define DETECT_BYTETEST_DCE   BIT_U8(4)

dce enabled

Definition at line 48 of file detect-bytetest.h.

DETECT_BYTETEST_LITTLE

#define DETECT_BYTETEST_LITTLE   BIT_U8(0)

Bytetest Flags "little" endian value

Definition at line 44 of file detect-bytetest.h.

DETECT_BYTETEST_OFFSET_BE

#define DETECT_BYTETEST_OFFSET_BE   BIT_U8(7)

byte extract value enabled

Definition at line 51 of file detect-bytetest.h.

DETECT_BYTETEST_OP_AND

#define DETECT_BYTETEST_OP_AND   4

"bitwise and" operator

Definition at line 32 of file detect-bytetest.h.

DETECT_BYTETEST_OP_EQ

#define DETECT_BYTETEST_OP_EQ   3

"equals" operator

Definition at line 31 of file detect-bytetest.h.

DETECT_BYTETEST_OP_GE

#define DETECT_BYTETEST_OP_GE   6

greater than equal operator

Definition at line 34 of file detect-bytetest.h.

DETECT_BYTETEST_OP_GT

#define DETECT_BYTETEST_OP_GT   2

"greater than" operator

Definition at line 30 of file detect-bytetest.h.

DETECT_BYTETEST_OP_LE

#define DETECT_BYTETEST_OP_LE   7

less than equal operator

Definition at line 35 of file detect-bytetest.h.

DETECT_BYTETEST_OP_LT

#define DETECT_BYTETEST_OP_LT   1

Bytetest Operators "less than" operator

Definition at line 29 of file detect-bytetest.h.

DETECT_BYTETEST_OP_OR

#define DETECT_BYTETEST_OP_OR   5

"bitwise or" operator

Definition at line 33 of file detect-bytetest.h.

DETECT_BYTETEST_RELATIVE

#define DETECT_BYTETEST_RELATIVE   BIT_U8(3)

"relative" offset

Definition at line 47 of file detect-bytetest.h.

DETECT_BYTETEST_STRING

#define DETECT_BYTETEST_STRING   BIT_U8(2)

"string" value

Definition at line 46 of file detect-bytetest.h.

DETECT_BYTETEST_VALUE_BE

#define DETECT_BYTETEST_VALUE_BE   BIT_U8(6)

byte extract value enabled

Definition at line 50 of file detect-bytetest.h.

Typedef Documentation

DetectBytetestData

typedef struct DetectBytetestData_ DetectBytetestData

Function Documentation

DetectBytetestDoMatch()

int DetectBytetestDoMatch	(	DetectEngineThreadCtx *	det_ctx,
		const Signature *	s,
		const SigMatchCtx *	ctx,
		const uint8_t *	payload,
		uint32_t	payload_len,
		uint8_t	flags,
		int32_t	offset,
		uint64_t	value
	)

Bytetest detection code.

Byte test works on the packet payload.

Parameters

det_ctx	thread de ctx
s	signature
m	sigmatch for this bytettest
payload	ptr to the start of the buffer to inspect
payload_len	length of the payload

Return values

1	match
0	no match

Definition at line 101 of file detect-bytetest.c.

References DetectBytetestData_::base, DetectBytetestData_::bitmask, DetectBytetestData_::bitmask_shift_count, DetectEngineThreadCtx_::buffer_offset, BYTE_BIG_ENDIAN, BYTE_LITTLE_ENDIAN, ByteExtractStringUint64(), ByteExtractUint64(), DETECT_BYTETEST_BITMASK, DETECT_BYTETEST_LITTLE, DETECT_BYTETEST_OP_AND, DETECT_BYTETEST_OP_EQ, DETECT_BYTETEST_OP_GE, DETECT_BYTETEST_OP_GT, DETECT_BYTETEST_OP_LE, DETECT_BYTETEST_OP_LT, DETECT_BYTETEST_OP_OR, DETECT_BYTETEST_RELATIVE, DETECT_BYTETEST_STRING, flags, len, DetectBytetestData_::nbytes, DetectBytetestData_::neg_op, offset, DetectBytetestData_::offset, DetectBytetestData_::op, payload_len, SCEnter, SCLogDebug, SCReturnInt, and DetectBytetestData_::value.

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DetectBytetestRegister()

void DetectBytetestRegister

(

void

)

Registration function for byte_test.

Todo:

add support for no_stream and stream_only

Definition at line 76 of file detect-bytetest.c.

References SigTableElmt_::desc, DETECT_BYTETEST, SigTableElmt_::Match, SigTableElmt_::name, sigmatch_table, and SigTableElmt_::url.

Referenced by SigTableSetup().

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