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remove populate_mpm_flags from inside PatternMatchPreparePopulateMpm()

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remotes/origin/master-1.1.x
Anoop Saldanha 15 years ago committed by Victor Julien
parent 6eaba8941c
commit a6899218fc
1 changed files with 59 additions and 48 deletions
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83
src/detect-engine-mpm.c
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@ -555,8 +555,7 @@ uint32_t PatternStrength(uint8_t *pat, uint16_t patlen) {
* \retval 0 Always.
*/
static int PatternMatchPreparePopulateMpm(DetectEngineCtx *de_ctx,
SigGroupHead *sgh,
uint8_t populate_mpm_flags)
SigGroupHead *sgh)
{
uint32_t sig;
uint32_t *fast_pattern = NULL;
@ -598,9 +597,8 @@ static int PatternMatchPreparePopulateMpm(DetectEngineCtx *de_ctx,
switch (sm->type) {
case DETECT_CONTENT:
if (sig_has_no_pkt_and_stream_content ||
(populate_mpm_flags & POPULATE_MPM_AVOID_PACKET_MPM_PATTERNS &&
populate_mpm_flags & POPULATE_MPM_AVOID_STREAM_MPM_PATTERNS)) {
break;
(!(sgh->flags & SIG_GROUP_HAVECONTENT && !(sgh->flags & SIG_GROUP_HEAD_MPM_COPY)) &&
!(sgh->flags & SIG_GROUP_HAVESTREAMCONTENT && !(sgh->flags & SIG_GROUP_HEAD_MPM_STREAM_COPY)))) { break;
}
cd = (DetectContentData *)sm->ctx;
/* special handling of fast pattern keyword */
@ -609,9 +607,8 @@ static int PatternMatchPreparePopulateMpm(DetectEngineCtx *de_ctx,
}
break;
case DETECT_URICONTENT:
if (populate_mpm_flags & POPULATE_MPM_AVOID_URI_MPM_PATTERNS) {
if (!(sgh->flags & SIG_GROUP_HAVEURICONTENT && !(sgh->flags & SIG_GROUP_HEAD_MPM_URI_COPY))) {
break;
}
ud = (DetectUricontentData *)sm->ctx;
@ -693,8 +690,8 @@ static int PatternMatchPreparePopulateMpm(DetectEngineCtx *de_ctx,
switch (sm->type) {
case DETECT_CONTENT:
if (sig_has_no_pkt_and_stream_content ||
(populate_mpm_flags & POPULATE_MPM_AVOID_PACKET_MPM_PATTERNS &&
populate_mpm_flags & POPULATE_MPM_AVOID_STREAM_MPM_PATTERNS)) {
(!(sgh->flags & SIG_GROUP_HAVECONTENT && !(sgh->flags & SIG_GROUP_HEAD_MPM_COPY)) &&
!(sgh->flags & SIG_GROUP_HAVESTREAMCONTENT && !(sgh->flags & SIG_GROUP_HEAD_MPM_STREAM_COPY)))) {
continue;
}
cd = (DetectContentData *)sm->ctx;
@ -704,7 +701,8 @@ static int PatternMatchPreparePopulateMpm(DetectEngineCtx *de_ctx,
break;
case DETECT_URICONTENT:
if (populate_mpm_flags & POPULATE_MPM_AVOID_URI_MPM_PATTERNS) {
if (!(sgh->flags & SIG_GROUP_HAVEURICONTENT &&
!(sgh->flags & SIG_GROUP_HEAD_MPM_URI_COPY))) {
continue;
}
ud = (DetectUricontentData *)sm->ctx;
@ -742,32 +740,18 @@ static int PatternMatchPreparePopulateMpm(DetectEngineCtx *de_ctx,
/* now add the mpm_ch to the mpm ctx */
if (mpm_sm != NULL) {
uint8_t flags = 0;
char scan_negated = 0;
DetectContentData *cd = NULL;
DetectUricontentData *ud = NULL;
switch (mpm_sm->type) {
case DETECT_CONTENT:
cd = (DetectContentData *)mpm_sm->ctx;
if (cd->flags & DETECT_CONTENT_NEGATED)
scan_negated = 1;
break;
case DETECT_URICONTENT:
ud = (DetectUricontentData *)mpm_sm->ctx;
if (ud->flags & DETECT_URICONTENT_NEGATED)
scan_negated = 1;
break;
}
switch (mpm_sm->type) {
case DETECT_CONTENT:
{
cd = (DetectContentData *)mpm_sm->ctx;
if (cd->flags & DETECT_CONTENT_FAST_PATTERN_CHOP) {
/* add the content to the "packet" mpm */
if (SignatureHasPacketContent(s) &&
(sgh->flags & SIG_GROUP_HAVECONTENT && !(sgh->flags & SIG_GROUP_HEAD_MPM_COPY))) {
if (cd->flags & DETECT_CONTENT_NOCASE) {
mpm_table[sgh->mpm_ctx->mpm_type].
AddPatternNocase(sgh->mpm_ctx,
@ -781,6 +765,33 @@ static int PatternMatchPreparePopulateMpm(DetectEngineCtx *de_ctx,
cd->fp_chop_len,
0, 0, cd->id, s->num, flags);
}
/* tell matcher we are inspecting packet */
s->flags |= SIG_FLAG_MPM_PACKET;
s->mpm_pattern_id_div_8 = cd->id / 8;
s->mpm_pattern_id_mod_8 = 1 << (cd->id % 8);
}
if (SignatureHasStreamContent(s) &&
(sgh->flags & SIG_GROUP_HAVESTREAMCONTENT && !(sgh->flags & SIG_GROUP_HEAD_MPM_STREAM_COPY))) {
if (cd->flags & DETECT_CONTENT_NOCASE) {
mpm_table[sgh->mpm_ctx->mpm_type].
AddPatternNocase(sgh->mpm_ctx,
cd->content + cd->fp_chop_offset,
cd->fp_chop_len,
0, 0, cd->id, s->num, flags);
} else {
mpm_table[sgh->mpm_ctx->mpm_type].
AddPattern(sgh->mpm_ctx,
cd->content + cd->fp_chop_offset,
cd->fp_chop_len,
0, 0, cd->id, s->num, flags);
}
/* tell matcher we are inspecting stream */
s->flags |= SIG_FLAG_MPM_STREAM;
s->mpm_stream_pattern_id_div_8 = cd->id / 8;
s->mpm_stream_pattern_id_mod_8 = 1 << (cd->id % 8);
}
} else {
if (cd->flags & DETECT_CONTENT_FAST_PATTERN_ONLY) {
cd->avoid_double_check = 1;
@ -802,7 +813,7 @@ static int PatternMatchPreparePopulateMpm(DetectEngineCtx *de_ctx,
} /* else - if (co->flags & DETECT_CONTENT_FAST_PATTERN_CHOP) */
if (SignatureHasPacketContent(s) &&
!(populate_mpm_flags & POPULATE_MPM_AVOID_PACKET_MPM_PATTERNS)) {
(sgh->flags & SIG_GROUP_HAVECONTENT && !(sgh->flags & SIG_GROUP_HEAD_MPM_COPY))) {
/* add the content to the "packet" mpm */
if (cd->flags & DETECT_CONTENT_NOCASE) {
mpm_table[sgh->mpm_ctx->mpm_type].
@ -821,7 +832,7 @@ static int PatternMatchPreparePopulateMpm(DetectEngineCtx *de_ctx,
s->mpm_pattern_id_mod_8 = 1 << (cd->id % 8);
}
if (SignatureHasStreamContent(s) &&
!(populate_mpm_flags & POPULATE_MPM_AVOID_STREAM_MPM_PATTERNS)) {
(sgh->flags & SIG_GROUP_HAVESTREAMCONTENT && !(sgh->flags & SIG_GROUP_HEAD_MPM_STREAM_COPY))) {
/* add the content to the "packet" mpm */
if (cd->flags & DETECT_CONTENT_NOCASE) {
mpm_table[sgh->mpm_stream_ctx->mpm_type].
@ -1909,18 +1920,18 @@ int PatternMatchPrepareGroup(DetectEngineCtx *de_ctx, SigGroupHead *sh)
}
}
if (!((populate_mpm_flags & POPULATE_MPM_AVOID_PACKET_MPM_PATTERNS) &&
(populate_mpm_flags & POPULATE_MPM_AVOID_STREAM_MPM_PATTERNS) &&
(populate_mpm_flags & POPULATE_MPM_AVOID_URI_MPM_PATTERNS))) {
if ( (sh->flags & SIG_GROUP_HAVECONTENT && !(sh->flags & SIG_GROUP_HEAD_MPM_COPY)) ||
(sh->flags & SIG_GROUP_HAVESTREAMCONTENT && !(sh->flags & SIG_GROUP_HEAD_MPM_STREAM_COPY)) ||
(sh->flags & SIG_GROUP_HAVEURICONTENT && !(sh->flags & SIG_GROUP_HEAD_MPM_URI_COPY)) ) {
PatternMatchPreparePopulateMpm(de_ctx, sh, populate_mpm_flags);
PatternMatchPreparePopulateMpm(de_ctx, sh);
if (de_ctx->sgh_mpm_context == ENGINE_SGH_MPM_FACTORY_CONTEXT_FULL) {
if (sh->mpm_ctx != NULL) {
if (sh->mpm_ctx->pattern_cnt == 0) {
sh->mpm_ctx = NULL;
} else {
if (!(populate_mpm_flags & POPULATE_MPM_AVOID_PACKET_MPM_PATTERNS)) {
if (sh->flags & SIG_GROUP_HAVECONTENT && !(sh->flags & SIG_GROUP_HEAD_MPM_COPY)) {
if (mpm_table[sh->mpm_ctx->mpm_type].Prepare != NULL)
mpm_table[sh->mpm_ctx->mpm_type].Prepare(sh->mpm_ctx);
}
@ -1930,7 +1941,7 @@ int PatternMatchPrepareGroup(DetectEngineCtx *de_ctx, SigGroupHead *sh)
if (sh->mpm_stream_ctx->pattern_cnt == 0) {
sh->mpm_stream_ctx = NULL;
} else {
if (!(populate_mpm_flags & POPULATE_MPM_AVOID_STREAM_MPM_PATTERNS)) {
if (sh->flags & SIG_GROUP_HAVESTREAMCONTENT && !(sh->flags & SIG_GROUP_HEAD_MPM_STREAM_COPY)) {
if (mpm_table[sh->mpm_stream_ctx->mpm_type].Prepare != NULL)
mpm_table[sh->mpm_stream_ctx->mpm_type].Prepare(sh->mpm_stream_ctx);
}
@ -1940,7 +1951,7 @@ int PatternMatchPrepareGroup(DetectEngineCtx *de_ctx, SigGroupHead *sh)
if (sh->mpm_uri_ctx->pattern_cnt == 0) {
sh->mpm_uri_ctx = NULL;
} else {
if (!(populate_mpm_flags & POPULATE_MPM_AVOID_URI_MPM_PATTERNS)) {
if (sh->flags & SIG_GROUP_HAVEURICONTENT && !(sh->flags & SIG_GROUP_HEAD_MPM_URI_COPY)) {
if (mpm_table[sh->mpm_uri_ctx->mpm_type].Prepare != NULL)
mpm_table[sh->mpm_uri_ctx->mpm_type].Prepare(sh->mpm_uri_ctx);
}

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