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Detect cleanups.

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remotes/origin/master-1.0.x
Victor Julien 16 years ago
parent 8e7b147a23
commit dff6795df5
2 changed files with 25 additions and 60 deletions
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82
src/detect.c
Unescape Escape View File

@ -549,9 +549,6 @@ int SigMatchSignatures(ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineTh
IPOnlyMatchPacket(de_ctx, det_ctx, &de_ctx->io_ctx, &det_ctx->io_ctx, p);
}
/* we assume we have an uri when we start inspection */
det_ctx->de_have_httpuri = TRUE;
det_ctx->sgh = SigMatchSignaturesGetSgh(th_v, de_ctx, det_ctx, p);
/* if we didn't get a sig group head, we
* have nothing to do.... */
@ -623,10 +620,8 @@ int SigMatchSignatures(ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineTh
/* inspect the sigs against the packet */
for (idx = 0; idx < det_ctx->sgh->sig_cnt; idx++) {
//for (idx = 0; idx < det_ctx->pmq.sig_id_array_cnt; idx++) {
PROFILING_START;
sig = det_ctx->sgh->match_array[idx];
//sig = det_ctx->pmq.sig_id_array[idx];
s = de_ctx->sig_array[sig];
SCLogDebug("inspecting signature id %"PRIu32"", s->id);
@ -638,29 +633,29 @@ int SigMatchSignatures(ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineTh
goto next;
}
if (s->flags & SIG_FLAG_MPM) {
if (s->flags & SIG_FLAG_MPM_URI) {
if (det_ctx->pmq.pattern_id_bitarray != NULL) {
/* filter out sigs that want pattern matches, but
* have no matches */
if (!(det_ctx->pmq.pattern_id_bitarray[(s->mpm_pattern_id / 8)] & (1<<(s->mpm_pattern_id % 8))) &&
(s->flags & SIG_FLAG_MPM) && !(s->flags & SIG_FLAG_MPM_NEGCONTENT)) {
SCLogDebug("mpm sig without matches (pat id check in content).");
if (!(det_ctx->pmq.pattern_id_bitarray[(s->mpm_uripattern_id / 8)] & (1<<(s->mpm_uripattern_id % 8))) &&
(s->flags & SIG_FLAG_MPM_URI) && !(s->flags & SIG_FLAG_MPM_URI_NEG)) {
SCLogDebug("mpm sig without matches (pat id %"PRIu32
" check in uri).", s->mpm_uripattern_id);
goto next;
}
}
}
if (s->flags & SIG_FLAG_MPM_URI) {
if (s->flags & SIG_FLAG_MPM) {
if (det_ctx->pmq.pattern_id_bitarray != NULL) {
/* filter out sigs that want pattern matches, but
* have no matches */
if (!(det_ctx->pmq.pattern_id_bitarray[(s->mpm_uripattern_id / 8)] & (1<<(s->mpm_uripattern_id % 8))) &&
(s->flags & SIG_FLAG_MPM_URI) && !(s->flags & SIG_FLAG_MPM_URI_NEG)) {
SCLogDebug("mpm sig without matches (pat id %"PRIu32
" check in uri).", s->mpm_uripattern_id);
if (!(det_ctx->pmq.pattern_id_bitarray[(s->mpm_pattern_id / 8)] & (1<<(s->mpm_pattern_id % 8))) &&
(s->flags & SIG_FLAG_MPM) && !(s->flags & SIG_FLAG_MPM_NEGCONTENT)) {
SCLogDebug("mpm sig without matches (pat id check in content).");
goto next;
}
}
}
@ -689,14 +684,6 @@ int SigMatchSignatures(ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineTh
}
}
/* check the source address */
if (!(s->flags & SIG_FLAG_SRC_ANY)) {
DetectAddress *saddr = DetectAddressLookupInHead(&s->src,&p->src);
if (saddr == NULL) {
SCLogDebug("src addr didn't match.");
goto next;
}
}
/* check the destination address */
if (!(s->flags & SIG_FLAG_DST_ANY)) {
DetectAddress *daddr = DetectAddressLookupInHead(&s->dst,&p->dst);
@ -705,12 +692,13 @@ int SigMatchSignatures(ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineTh
goto next;
}
}
/* Check the payload keywords. If we are a MPM sig and we've made
* to here, we've had at least one of the patterns match */
if (s->pmatch != NULL) {
if (DetectEngineInspectPacketPayload(de_ctx, det_ctx, s, p->flow, flags, alstate, p) != 1)
/* check the source address */
if (!(s->flags & SIG_FLAG_SRC_ANY)) {
DetectAddress *saddr = DetectAddressLookupInHead(&s->src,&p->src);
if (saddr == NULL) {
SCLogDebug("src addr didn't match.");
goto next;
}
}
/* Check the uricontent keywords here. */
@ -734,6 +722,13 @@ int SigMatchSignatures(ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineTh
}
}
/* Check the payload keywords. If we are a MPM sig and we've made
* to here, we've had at least one of the patterns match */
if (s->pmatch != NULL) {
if (DetectEngineInspectPacketPayload(de_ctx, det_ctx, s, p->flow, flags, alstate, p) != 1)
goto next;
}
/* if we get here but have no sigmatches to match against,
* we consider the sig matched. */
if (s->match == NULL) {
@ -744,12 +739,6 @@ int SigMatchSignatures(ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineTh
PacketAlertAppend(det_ctx, s, p);
}
} else {
/* reset offset */
det_ctx->payload_offset = 0;
/* new signature, so reset indicator of checking distance and within */
det_ctx->de_checking_distancewithin = 0;
if (s->flags & SIG_FLAG_RECURSIVE) {
uint8_t rmatch = 0;
det_ctx->pkt_cnt = 0;
@ -757,17 +746,7 @@ int SigMatchSignatures(ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineTh
do {
sm = s->match;
while (sm) {
match = 0;
/* app layer match has preference */
if (sigmatch_table[sm->type].AppLayerMatch != NULL &&
alproto == sigmatch_table[sm->type].alproto &&
alstate != NULL) {
match = sigmatch_table[sm->type].AppLayerMatch(th_v, det_ctx, p->flow, flags, alstate, s, sm);
} else if (sigmatch_table[sm->type].Match != NULL) {
match = sigmatch_table[sm->type].Match(th_v, det_ctx, p, s, sm);
}
match = sigmatch_table[sm->type].Match(th_v, det_ctx, p, s, sm);
if (match > 0) {
/* okay, try the next match */
sm = sm->next;
@ -801,18 +780,7 @@ int SigMatchSignatures(ThreadVars *th_v, DetectEngineCtx *de_ctx, DetectEngineTh
SCLogDebug("running match functions, sm %p", sm);
while (sm) {
match = 0;
/* app layer match has preference */
if (sigmatch_table[sm->type].AppLayerMatch != NULL &&
alproto == sigmatch_table[sm->type].alproto &&
alstate != NULL) {
SCLogDebug("App layer match function has been invoked");
match = sigmatch_table[sm->type].AppLayerMatch(th_v, det_ctx, p->flow, flags, alstate, s, sm);
} else if (sigmatch_table[sm->type].Match != NULL) {
match = sigmatch_table[sm->type].Match(th_v, det_ctx, p, s, sm);
}
match = sigmatch_table[sm->type].Match(th_v, det_ctx, p, s, sm);
if (match > 0) {
/* okay, try the next match */
sm = sm->next;

3
src/detect.h
Unescape Escape View File

@ -477,9 +477,6 @@ typedef struct DetectionEngineThreadCtx_ {
/** recursive counter */
uint8_t pkt_cnt;
char de_checking_distancewithin;
char de_checking_uricontent_distancewithin;
/* http_uri stuff for uricontent */
char de_have_httpuri;

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