suricata
detect-bytejump.c File Reference
#include "suricata-common.h"
#include "debug.h"
#include "decode.h"
#include "detect.h"
#include "detect-parse.h"
#include "detect-engine.h"
#include "app-layer.h"
#include "detect-bytejump.h"
#include "detect-byte-extract.h"
#include "detect-content.h"
#include "detect-uricontent.h"
#include "util-byte.h"
#include "util-unittest.h"
#include "util-debug.h"
#include "detect-pcre.h"
#include "util-unittest-helper.h"
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Macros

#define PARSE_REGEX
 Regex for parsing our options. More...
 
#define MAX_SUBSTRINGS   30
 

Functions

void DetectBytejumpRegister (void)
 
int DetectBytejumpDoMatch (DetectEngineThreadCtx *det_ctx, const Signature *s, const SigMatchCtx *ctx, uint8_t *payload, uint32_t payload_len, uint8_t flags, int32_t offset)
 Byte jump match function. More...
 

Detailed Description

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

Implements byte_jump keyword.

Definition in file detect-bytejump.c.

Macro Definition Documentation

#define MAX_SUBSTRINGS   30

Referenced by DetectBytejumpDoMatch().

#define PARSE_REGEX
Value:
"^\\s*" \
"([^\\s,]+\\s*,\\s*[^\\s,]+)" \
"(?:\\s*,\\s*((?:multiplier|post_offset)\\s+[^\\s,]+|[^\\s,]+))?" \
"(?:\\s*,\\s*((?:multiplier|post_offset)\\s+[^\\s,]+|[^\\s,]+))?" \
"(?:\\s*,\\s*((?:multiplier|post_offset)\\s+[^\\s,]+|[^\\s,]+))?" \
"(?:\\s*,\\s*((?:multiplier|post_offset)\\s+[^\\s,]+|[^\\s,]+))?" \
"(?:\\s*,\\s*((?:multiplier|post_offset)\\s+[^\\s,]+|[^\\s,]+))?" \
"(?:\\s*,\\s*((?:multiplier|post_offset)\\s+[^\\s,]+|[^\\s,]+))?" \
"(?:\\s*,\\s*((?:multiplier|post_offset)\\s+[^\\s,]+|[^\\s,]+))?" \
"(?:\\s*,\\s*((?:multiplier|post_offset)\\s+[^\\s,]+|[^\\s,]+))?" \
"(?:\\s*,\\s*((?:multiplier|post_offset)\\s+[^\\s,]+|[^\\s,]+))?" \
"\\s*$"

Regex for parsing our options.

Definition at line 47 of file detect-bytejump.c.

Referenced by DetectBytejumpRegister().

Function Documentation

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

Byte jump match function.

Parameters
det_ctxthread detect engine ctx
ssignature
mbyte jump sigmatch
payloadptr to the payload
payload_lenlength of the payload
Return values
1match
0no match

Definition at line 90 of file detect-bytejump.c.

References Signature_::alproto, ALPROTO_DCERPC, DetectBytejumpData_::base, DetectEngineThreadCtx_::buffer_offset, BYTE_BIG_ENDIAN, BYTE_LITTLE_ENDIAN, ByteExtractStringInt32(), ByteExtractStringUint32(), ByteExtractStringUint64(), ByteExtractUint64(), SigMatch_::ctx, DE_QUIET, DETECT_BYTE_EXTRACT, DETECT_BYTEJUMP, DETECT_BYTEJUMP_ALIGN, DETECT_BYTEJUMP_BASE_DEC, DETECT_BYTEJUMP_BASE_HEX, DETECT_BYTEJUMP_BASE_OCT, DETECT_BYTEJUMP_BASE_UNSET, DETECT_BYTEJUMP_BEGIN, DETECT_BYTEJUMP_BIG, DETECT_BYTEJUMP_DCE, DETECT_BYTEJUMP_LITTLE, DETECT_BYTEJUMP_OFFSET_BE, DETECT_BYTEJUMP_RELATIVE, DETECT_BYTEJUMP_STRING, DETECT_BYTETEST, DETECT_CONTENT, DETECT_CONTENT_RELATIVE_NEXT, DETECT_ISDATAAT, DETECT_PCRE, DETECT_PCRE_RELATIVE_NEXT, DETECT_SM_LIST_NOTSET, DETECT_SM_LIST_PMATCH, DetectBufferGetActiveList(), DetectBufferTypeGetByName(), DetectByteExtractRetrieveSMVar(), DetectEngineCtxFree(), DetectEngineCtxInit(), DetectGetLastSMFromLists(), DetectSignatureSetAppProto(), DetectPcreData_::flags, DetectBytejumpData_::flags, DetectContentData_::flags, DetectEngineCtx_::flags, Signature_::init_data, len, SignatureInitData_::list, MAX_SUBSTRINGS, DetectBytejumpData_::multiplier, DetectBytejumpData_::nbytes, Signature_::next, DetectBytejumpData_::offset, offset, Packet_::payload, payload_len, Packet_::payload_len, DetectBytejumpData_::post_offset, res, SC_ERR_CONFLICTING_RULE_KEYWORDS, SC_ERR_INVALID_ARGUMENT, SC_ERR_INVALID_SIGNATURE, SC_ERR_INVALID_VALUE, SC_ERR_PCRE_GET_SUBSTRING, SC_ERR_PCRE_PARSE, SCEnter, SCFree, SCLogDebug, SCLogDebugEnabled(), SCLogError, SCMalloc, SCReturnInt, SCStrdup, DetectEngineCtx_::sig_list, SigAlloc(), SigCleanSignatures(), SigFree(), SigGroupCleanup(), SigInit(), SigMatchAlloc(), SigMatchAppendSMToList(), SigMatchListSMBelongsTo(), str, strlcpy(), SigMatch_::type, unlikely, UTHBuildPacket(), UTHFreePacket(), UTHPacketMatchSig(), and UtRegisterTest().

Referenced by DetectEngineContentInspection().

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void DetectBytejumpRegister ( void  )

Registration function for byte_jump.

Todo:
add support for no_stream and stream_only

Definition at line 70 of file detect-bytejump.c.

References DETECT_BYTEJUMP, DetectSetupParseRegexes(), SigTableElmt_::Free, SigTableElmt_::Match, SigTableElmt_::name, PARSE_REGEX, SigTableElmt_::RegisterTests, SigTableElmt_::Setup, and sigmatch_table.

Referenced by SigTableSetup().

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