Support fast_pattern modifier keyword for content

remotes/origin/master-1.0.x
Anoop Saldanha 17 years ago committed by Victor Julien
parent 07bcc8cc9a
commit 6ca5dbc9e9

@ -51,6 +51,7 @@ detect-pktvar.c detect-pktvar.h \
detect-pcre.c detect-pcre.h \
detect-depth.c detect-depth.h \
detect-nocase.c detect-nocase.h \
detect-fast-pattern.c detect-fast-pattern.h \
detect-recursive.c detect-recursive.h \
detect-rawbytes.c detect-rawbytes.h \
detect-bytetest.c detect-bytetest.h \

@ -5,6 +5,7 @@
#define DETECT_CONTENT_DISTANCE 0x02
#define DETECT_CONTENT_WITHIN 0x04
#define DETECT_CONTENT_FAST_PATTERN 0x08
#define DETECT_CONTENT_DISTANCE_NEXT 0x08
#define DETECT_CONTENT_WITHIN_NEXT 0x10
#define DETECT_CONTENT_ISDATAAT_RELATIVE 0x20

@ -249,6 +249,7 @@ uint32_t PatternStrength(uint8_t *pat, uint16_t patlen, uint16_t len) {
/** \brief Setup the content portion of the sig group head */
static int PatternMatchPreprarePopulateMpm(DetectEngineCtx *de_ctx, SigGroupHead *sgh) {
uint32_t sig;
int fast_pattern = 0;
HashTable *ht = HashTableInit(4096, ContentHashFunc, ContentHashCompareFunc, ContentHashFree);
if (ht == NULL)
@ -264,6 +265,7 @@ static int PatternMatchPreprarePopulateMpm(DetectEngineCtx *de_ctx, SigGroupHead
int cnt = 0;
SigMatch *sm;
/* get the total no of patterns in this Signature */
for (sm = s->match; sm != NULL; sm = sm->next) {
if (sm->type == DETECT_CONTENT) {
DetectContentData *co = (DetectContentData *)sm->ctx;
@ -273,14 +275,33 @@ static int PatternMatchPreprarePopulateMpm(DetectEngineCtx *de_ctx, SigGroupHead
cnt++;
}
}
/* Find out if we have a fast pattern set in this Signature */
for (sm = s->match; sm != NULL; sm = sm->next) {
if (sm->type == DETECT_CONTENT) {
DetectContentData *co = (DetectContentData *)sm->ctx;
if (co == NULL)
continue;
if (co->content_len < sgh->mpm_content_maxlen)
if (co->flags & DETECT_CONTENT_FAST_PATTERN) {
fast_pattern = 1;
break;
}
}
}
for (sm = s->match; sm != NULL; sm = sm->next) {
if (sm->type == DETECT_CONTENT) {
DetectContentData *co = (DetectContentData *)sm->ctx;
if (co == NULL)
continue;
if (fast_pattern == 1) {
if (!(co->flags & DETECT_CONTENT_FAST_PATTERN))
continue;
} else if (co->content_len < sgh->mpm_content_maxlen) {
continue;
}
ContentHash *ch = ContentHashAlloc(co);
if (ch == NULL)
@ -331,8 +352,12 @@ static int PatternMatchPreprarePopulateMpm(DetectEngineCtx *de_ctx, SigGroupHead
if (co == NULL)
continue;
if (co->content_len < sgh->mpm_content_maxlen)
if (fast_pattern == 1) {
if (!(co->flags & DETECT_CONTENT_FAST_PATTERN))
continue;
} else if (co->content_len < sgh->mpm_content_maxlen) {
continue;
}
ContentHash *ch = ContentHashAlloc(co);
if (ch == NULL)

@ -0,0 +1,744 @@
/** Copyright (c) 2009 Open Information Security Foundation.
* \author Anoop Saldanha <poonaatsoc@gmail.com>
*/
#include "eidps-common.h"
#include "detect.h"
#include "detect-content.h"
#include "detect-parse.h"
#include "detect-engine.h"
#include "detect-engine-mpm.h"
#include "detect-fast-pattern.h"
#include "util-error.h"
#include "util-debug.h"
#include "util-unittest.h"
int DetectFastPatternSetup(DetectEngineCtx *, Signature *, SigMatch *, char *);
void DetectFastPatternRegisterTests(void);
/**
* \brief Registration function for fast_pattern keyword
*/
void DetectFastPatternRegister(void) {
sigmatch_table[DETECT_FAST_PATTERN].name = "fast_pattern";
sigmatch_table[DETECT_FAST_PATTERN].Match = NULL;
sigmatch_table[DETECT_FAST_PATTERN].Setup = DetectFastPatternSetup;
sigmatch_table[DETECT_FAST_PATTERN].Free = NULL;
sigmatch_table[DETECT_FAST_PATTERN].RegisterTests = DetectFastPatternRegisterTests;
sigmatch_table[DETECT_FAST_PATTERN].flags |= SIGMATCH_PAYLOAD;
}
/**
* \brief Configures the previous content context for a fast_pattern modifier
* keyword used in the rule
*
* \param de_ctx Pointer to the Detection Engine Context
* \param s Pointer to the Signature to which the current keyword belongs
* \param m Pointer to the SigMatch
* \param null_str Should hold an empty string always
*
* \retval 0 On success
* \retval -1 On failure
*/
int DetectFastPatternSetup(DetectEngineCtx *de_ctx, Signature *s, SigMatch *m,
char *null_str)
{
if (null_str != NULL && strcmp(null_str, "") != 0) {
SCLogError(SC_INVALID_ARGUMENT, "DetectFastPatternSetup: fast_pattern "
"shouldn't be supplied with a value");
return -1;
}
if (m == NULL) {
SCLogWarning(SC_ERR_INVALID_SIGNATURE, "fast_pattern found inside the "
"rule, without any preceding keywords");
return -1;
}
if (m->type != DETECT_CONTENT) {
SCLogWarning(SC_ERR_INVALID_SIGNATURE, "fast_pattern found inside the "
"rule, with content not being its preceding keyword");
return -1;
}
((DetectContentData *)m->ctx)->flags |= DETECT_CONTENT_FAST_PATTERN;
return 0;
}
/*----------------------------------Unittests---------------------------------*/
#ifdef UNITTESTS
inline SigGroupHead *SigMatchSignaturesGetSgh(ThreadVars *,
DetectEngineCtx *,
DetectEngineThreadCtx *,
Packet *);
int DetectFastPatternTest01(void)
{
SigMatch *sm = NULL;
DetectEngineCtx *de_ctx = NULL;
int result = 1;
if ( (de_ctx = DetectEngineCtxInit()) == NULL) {
result = 0;
goto end;
}
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any "
"(content:\"/one/\"; fast_pattern; "
"msg:\"Testing fast_pattern\"; sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 0;
goto end;
}
result = 0;
sm = de_ctx->sig_list->match;
while (sm != NULL) {
if (sm->type == DETECT_CONTENT) {
if ( ((DetectContentData *)sm->ctx)->flags &
DETECT_CONTENT_FAST_PATTERN) {
result |= 1;
break;
} else {
result = 0;
break;
}
}
sm = sm->next;
}
end:
SigCleanSignatures(de_ctx);
DetectEngineCtxFree(de_ctx);
return result;
}
int DetectFastPatternTest02(void)
{
SigMatch *sm = NULL;
DetectEngineCtx *de_ctx = NULL;
int result = 1;
if ( (de_ctx = DetectEngineCtxInit()) == NULL) {
result = 0;
goto end;
}
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any "
"(content:\"/one/\"; fast_pattern; "
"content:boo; fast_pattern; "
"msg:\"Testing fast_pattern\"; sid:1;)");
if (de_ctx->sig_list == NULL)
result = 0;
result = 0;
sm = de_ctx->sig_list->match;
while (sm != NULL) {
if (sm->type == DETECT_CONTENT) {
if (((DetectContentData *)sm->ctx)->flags &
DETECT_CONTENT_FAST_PATTERN) {
result |= 1;
} else {
result = 0;
break;
}
}
sm = sm->next;
}
end:
SigCleanSignatures(de_ctx);
DetectEngineCtxFree(de_ctx);
return result;
}
int DetectFastPatternTest03(void)
{
SigMatch *sm = NULL;
DetectEngineCtx *de_ctx = NULL;
int result = 1;
if ( (de_ctx = DetectEngineCtxInit()) == NULL) {
result = 0;
goto end;
}
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any "
"(content:\"/one/\"; "
"msg:\"Testing fast_pattern\"; sid:1;)");
if (de_ctx->sig_list == NULL)
result = 0;
result = 0;
sm = de_ctx->sig_list->match;
while (sm != NULL) {
if (sm->type == DETECT_CONTENT) {
if ( !(((DetectContentData *)sm->ctx)->flags &
DETECT_CONTENT_FAST_PATTERN)) {
result |= 1;
} else {
result = 0;
break;
}
}
sm = sm->next;
}
end:
SigCleanSignatures(de_ctx);
DetectEngineCtxFree(de_ctx);
return result;
}
int DetectFastPatternTest04(void)
{
DetectEngineCtx *de_ctx = NULL;
int result = 1;
if ( (de_ctx = DetectEngineCtxInit()) == NULL) {
result = 0;
goto end;
}
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any "
"(content:\"/one/\"; fast_pattern:boo; "
"msg:\"Testing fast_pattern\"; sid:1;)");
if (de_ctx->sig_list == NULL)
result = 1;
end:
SigCleanSignatures(de_ctx);
DetectEngineCtxFree(de_ctx);
return result;
}
int DetectFastPatternTest05(void)
{
uint8_t *buf = (uint8_t *) "Oh strin1. But what "
"strin2. This is strings3. We strins_str4. we "
"have strins_string5";
uint16_t buflen = strlen((char *)buf);
Packet p;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx;
int result = 0;
memset(&th_v, 0, sizeof(th_v));
memset(&p, 0, sizeof(p));
p.src.family = AF_INET;
p.dst.family = AF_INET;
p.payload = buf;
p.payload_len = buflen;
p.proto = IPPROTO_TCP;
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL) {
goto end;
}
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(msg:\"fast_pattern test\"; content:string1; "
"content:string2; content:strings3; fast_pattern; "
"content:strings_str4; content:strings_string5; "
"sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 0;
goto end;
}
SigGroupBuild(de_ctx);
PatternMatchPrepare(mpm_ctx, MPM_B2G);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
/* start the scan phase */
det_ctx->sgh = SigMatchSignaturesGetSgh(&th_v, de_ctx, det_ctx, &p);
if (PacketPatternScan(&th_v, det_ctx, &p) != 0)
result = 1;
SigGroupCleanup(de_ctx);
SigCleanSignatures(de_ctx);
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
PatternMatchDestroy(mpm_ctx);
DetectEngineCtxFree(de_ctx);
end:
return result;
}
int DetectFastPatternTest06(void)
{
uint8_t *buf = (uint8_t *) "Oh this is a string1. But what is this with "
"string2. This is strings3. We have strings_str4. We also have "
"strings_string5";
uint16_t buflen = strlen((char *)buf);
Packet p;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx;
int result = 0;
memset(&th_v, 0, sizeof(th_v));
memset(&p, 0, sizeof(p));
p.src.family = AF_INET;
p.dst.family = AF_INET;
p.payload = buf;
p.payload_len = buflen;
p.proto = IPPROTO_TCP;
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL) {
goto end;
}
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(msg:\"fast_pattern test\"; content:string1; "
"content:string2; content:strings3; fast_pattern; "
"content:strings_str4; content:strings_string5; "
"sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 0;
goto end;
}
SigGroupBuild(de_ctx);
PatternMatchPrepare(mpm_ctx, MPM_B2G);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
/* start the scan phase */
det_ctx->sgh = SigMatchSignaturesGetSgh(&th_v, de_ctx, det_ctx, &p);
if (PacketPatternScan(&th_v, det_ctx, &p) != 0)
result = 1;
SigGroupCleanup(de_ctx);
SigCleanSignatures(de_ctx);
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
PatternMatchDestroy(mpm_ctx);
DetectEngineCtxFree(de_ctx);
end:
return result;
}
int DetectFastPatternTest07(void)
{
uint8_t *buf = (uint8_t *) "Dummy is our name. Oh yes. From right here "
"right now, all the way to hangover. right. now here comes our "
"dark knight strings_string5. Yes here is our dark knight";
uint16_t buflen = strlen((char *)buf);
Packet p;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx;
int result = 0;
memset(&th_v, 0, sizeof(th_v));
memset(&p, 0, sizeof(p));
p.src.family = AF_INET;
p.dst.family = AF_INET;
p.payload = buf;
p.payload_len = buflen;
p.proto = IPPROTO_TCP;
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL) {
goto end;
}
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(msg:\"fast_pattern test\"; content:string1; "
"content:string2; content:strings3; fast_pattern; "
"content:strings_str4; content:strings_string5; "
"sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 0;
goto end;
}
SigGroupBuild(de_ctx);
PatternMatchPrepare(mpm_ctx, MPM_B2G);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
/* start the scan phase */
det_ctx->sgh = SigMatchSignaturesGetSgh(&th_v, de_ctx, det_ctx, &p);
if (PacketPatternScan(&th_v, det_ctx, &p) == 0)
result = 1;
SigGroupCleanup(de_ctx);
SigCleanSignatures(de_ctx);
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
PatternMatchDestroy(mpm_ctx);
DetectEngineCtxFree(de_ctx);
end:
return result;
}
int DetectFastPatternTest08(void)
{
uint8_t *buf = (uint8_t *) "Dummy is our name. Oh yes. From right here "
"right now, all the way to hangover. right. now here comes our "
"dark knight strings3. Yes here is our dark knight";
uint16_t buflen = strlen((char *)buf);
Packet p;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx;
int result = 0;
memset(&th_v, 0, sizeof(th_v));
memset(&p, 0, sizeof(p));
p.src.family = AF_INET;
p.dst.family = AF_INET;
p.payload = buf;
p.payload_len = buflen;
p.proto = IPPROTO_TCP;
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(msg:\"fast_pattern test\"; content:string1; "
"content:string2; content:strings3; fast_pattern; "
"content:strings_str4; content:strings_string5; "
"sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 0;
goto end;
}
SigGroupBuild(de_ctx);
PatternMatchPrepare(mpm_ctx, MPM_B2G);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
/* start the scan phase */
det_ctx->sgh = SigMatchSignaturesGetSgh(&th_v, de_ctx, det_ctx, &p);
if (PacketPatternScan(&th_v, det_ctx, &p) == 1)
result = 1;
SigGroupCleanup(de_ctx);
SigCleanSignatures(de_ctx);
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
PatternMatchDestroy(mpm_ctx);
DetectEngineCtxFree(de_ctx);
end:
return result;
}
int DetectFastPatternTest09(void)
{
uint8_t *buf = (uint8_t *) "Dummy is our name. Oh yes. From right here "
"right now, all the way to hangover. right. no_strings4 _imp now here "
"comes our dark knight strings3. Yes here is our dark knight";
uint16_t buflen = strlen((char *)buf);
Packet p;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx;
int result = 0;
memset(&th_v, 0, sizeof(th_v));
memset(&p, 0, sizeof(p));
p.src.family = AF_INET;
p.dst.family = AF_INET;
p.payload = buf;
p.payload_len = buflen;
p.proto = IPPROTO_TCP;
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(msg:\"fast_pattern test\"; content:string1; "
"content:string2; content:strings3; fast_pattern; "
"content:strings4_imp; fast_pattern; "
"content:strings_string5; sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 0;
goto end;
}
SigGroupBuild(de_ctx);
PatternMatchPrepare(mpm_ctx, MPM_B2G);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
/* start the scan phase */
det_ctx->sgh = SigMatchSignaturesGetSgh(&th_v, de_ctx, det_ctx, &p);
if (PacketPatternScan(&th_v, det_ctx, &p) == 0)
result = 1;
SigGroupCleanup(de_ctx);
SigCleanSignatures(de_ctx);
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
PatternMatchDestroy(mpm_ctx);
DetectEngineCtxFree(de_ctx);
end:
return result;
}
int DetectFastPatternTest10(void)
{
uint8_t *buf = (uint8_t *) "Dummy is our name. Oh yes. From right here "
"right now, all the way to hangover. right. strings4_imp now here "
"comes our dark knight strings5. Yes here is our dark knight";
uint16_t buflen = strlen((char *)buf);
Packet p;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx;
int result = 0;
memset(&th_v, 0, sizeof(th_v));
memset(&p, 0, sizeof(p));
p.src.family = AF_INET;
p.dst.family = AF_INET;
p.payload = buf;
p.payload_len = buflen;
p.proto = IPPROTO_TCP;
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(msg:\"fast_pattern test\"; content:string1; "
"content:string2; content:strings3; fast_pattern; "
"content:strings4_imp; fast_pattern; "
"content:strings_string5; sid:1;)");
if (de_ctx->sig_list == NULL)
result = 0;
SigGroupBuild(de_ctx);
PatternMatchPrepare(mpm_ctx, MPM_B2G);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
/* start the scan phase */
det_ctx->sgh = SigMatchSignaturesGetSgh(&th_v, de_ctx, det_ctx, &p);
if (PacketPatternScan(&th_v, det_ctx, &p) == 1)
result = 1;
SigGroupCleanup(de_ctx);
SigCleanSignatures(de_ctx);
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
PatternMatchDestroy(mpm_ctx);
DetectEngineCtxFree(de_ctx);
end:
return result;
}
int DetectFastPatternTest11(void)
{
uint8_t *buf = (uint8_t *) "Dummy is our name. Oh yes. From right here "
"right now, all the way to hangover. right. strings5_imp now here "
"comes our dark knight strings5. Yes here is our dark knight";
uint16_t buflen = strlen((char *)buf);
Packet p;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx;
int result = 0;
memset(&th_v, 0, sizeof(th_v));
memset(&p, 0, sizeof(p));
p.src.family = AF_INET;
p.dst.family = AF_INET;
p.payload = buf;
p.payload_len = buflen;
p.proto = IPPROTO_TCP;
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(msg:\"fast_pattern test\"; content:string1; "
"content:string2; content:strings3; fast_pattern; "
"content:strings4_imp; fast_pattern; "
"content:strings_string5; sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 0;
goto end;
}
SigGroupBuild(de_ctx);
PatternMatchPrepare(mpm_ctx, MPM_B2G);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
/* start the scan phase */
det_ctx->sgh = SigMatchSignaturesGetSgh(&th_v, de_ctx, det_ctx, &p);
if (PacketPatternScan(&th_v, det_ctx, &p) == 0)
result = 1;
SigGroupCleanup(de_ctx);
SigCleanSignatures(de_ctx);
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
PatternMatchDestroy(mpm_ctx);
DetectEngineCtxFree(de_ctx);
end:
return result;
}
int DetectFastPatternTest12(void)
{
uint8_t *buf = (uint8_t *) "Dummy is our name. Oh yes. From right here "
"right now, all the way to hangover. right. strings5_imp now here "
"comes our dark knight strings5. Yes here is our dark knight";
uint16_t buflen = strlen((char *)buf);
Packet p;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx;
int result = 0;
memset(&th_v, 0, sizeof(th_v));
memset(&p, 0, sizeof(p));
p.src.family = AF_INET;
p.dst.family = AF_INET;
p.payload = buf;
p.payload_len = buflen;
p.proto = IPPROTO_TCP;
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(msg:\"fast_pattern test\"; content:string1; "
"content:string2; content:strings3; "
"content:strings4_imp; "
"content:strings_string5; sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 0;
goto end;
}
SigGroupBuild(de_ctx);
PatternMatchPrepare(mpm_ctx, MPM_B2G);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
/* start the scan phase */
det_ctx->sgh = SigMatchSignaturesGetSgh(&th_v, de_ctx, det_ctx, &p);
if (PacketPatternScan(&th_v, det_ctx, &p) == 0)
result = 1;
SigGroupCleanup(de_ctx);
SigCleanSignatures(de_ctx);
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
PatternMatchDestroy(mpm_ctx);
DetectEngineCtxFree(de_ctx);
end:
return result;
}
int DetectFastPatternTest13(void)
{
uint8_t *buf = (uint8_t *) "Dummy is our name. Oh yes. From right here "
"right now, all the way to hangover. right. strings5_imp now here "
"comes our dark knight strings_string5. Yes here is our dark knight";
uint16_t buflen = strlen((char *)buf);
Packet p;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx;
int result = 0;
memset(&th_v, 0, sizeof(th_v));
memset(&p, 0, sizeof(p));
p.src.family = AF_INET;
p.dst.family = AF_INET;
p.payload = buf;
p.payload_len = buflen;
p.proto = IPPROTO_TCP;
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(msg:\"fast_pattern test\"; content:string1; "
"content:string2; content:strings3; "
"content:strings4_imp; "
"content:strings_string5; sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 0;
goto end;
}
SigGroupBuild(de_ctx);
PatternMatchPrepare(mpm_ctx, MPM_B2G);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
/* start the scan phase */
det_ctx->sgh = SigMatchSignaturesGetSgh(&th_v, de_ctx, det_ctx, &p);
if (PacketPatternScan(&th_v, det_ctx, &p) == 1)
result = 1;
SigGroupCleanup(de_ctx);
SigCleanSignatures(de_ctx);
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
PatternMatchDestroy(mpm_ctx);
DetectEngineCtxFree(de_ctx);
end:
return result;
}
#endif
void DetectFastPatternRegisterTests(void)
{
#ifdef UNITTESTS
UtRegisterTest("DetectFastPatternTest01", DetectFastPatternTest01, 1);
UtRegisterTest("DetectFastPatternTest02", DetectFastPatternTest02, 1);
UtRegisterTest("DetectFastPatternTest03", DetectFastPatternTest03, 1);
UtRegisterTest("DetectFastPatternTest04", DetectFastPatternTest04, 1);
UtRegisterTest("DetectFastPatternTest05", DetectFastPatternTest05, 1);
UtRegisterTest("DetectFastPatternTest06", DetectFastPatternTest06, 1);
UtRegisterTest("DetectFastPatternTest07", DetectFastPatternTest07, 1);
UtRegisterTest("DetectFastPatternTest08", DetectFastPatternTest08, 1);
UtRegisterTest("DetectFastPatternTest09", DetectFastPatternTest09, 1);
UtRegisterTest("DetectFastPatternTest10", DetectFastPatternTest10, 1);
UtRegisterTest("DetectFastPatternTest11", DetectFastPatternTest11, 1);
UtRegisterTest("DetectFastPatternTest12", DetectFastPatternTest12, 1);
UtRegisterTest("DetectFastPatternTest13", DetectFastPatternTest13, 1);
#endif
}

@ -0,0 +1,11 @@
/** Copyright (c) 2009 Open Information Security Foundation.
* \author Anoop Saldanha <poonaatsoc@gmail.com>
*/
#ifndef __DETECT_FAST_PATTERN_H__
#define __DETECT_FAST_PATTERN_H__
void DetectFastPatternRegister(void);
#endif /* __DETECT_FAST_PATTERN_H__ */

@ -59,6 +59,7 @@
#include "detect-stream_size.h"
#include "detect-engine-sigorder.h"
#include "detect-ttl.h"
#include "detect-fast-pattern.h"
#include "util-rule-vars.h"
#include "action-globals.h"
@ -299,7 +300,7 @@ int PacketAlertAppend(Packet *p, uint32_t gid, uint32_t sid, uint8_t rev, uint8_
return 0;
}
static inline SigGroupHead *SigMatchSignaturesGetSgh(ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, Packet *p) {
inline SigGroupHead *SigMatchSignaturesGetSgh(ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, Packet *p) {
int ds,f;
SigGroupHead *sgh = NULL;
@ -2620,6 +2621,7 @@ void SigTableSetup(void) {
DetectCsumRegister();
DetectStreamSizeRegister();
DetectTtlRegister();
DetectFastPatternRegister();
uint8_t i = 0;
for (i = 0; i < DETECT_TBLSIZE; i++) {

@ -418,6 +418,7 @@ enum {
DETECT_WITHIN,
DETECT_OFFSET,
DETECT_NOCASE,
DETECT_FAST_PATTERN,
DETECT_RECURSIVE,
DETECT_RAWBYTES,
DETECT_BYTETEST,

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