detect-events: set SIG_MASK_REQUIRE_*_STATE for events

Set SIG_MASK_REQUIRE_*_STATE for event rules to earlier discard
them.

src/detect.c

@@ -2434,6 +2434,30 @@ static int SignatureCreateMask(Signature *s)
         }
     }
 
+    for (sm = s->sm_lists[DETECT_SM_LIST_APP_EVENT] ; sm != NULL; sm = sm->next) {
+        switch (sm->type) {
+            case DETECT_AL_APP_LAYER_EVENT:
+            {
+                DetectAppLayerEventData *aed = (DetectAppLayerEventData *)sm->ctx;
+                switch (aed->alproto) {
+                    case ALPROTO_HTTP:
+                        s->mask |= SIG_MASK_REQUIRE_HTTP_STATE;
+                        SCLogDebug("sig %u requires http app state (http event)", s->id);
+                        break;
+                    case ALPROTO_SMTP:
+                        s->mask |= SIG_MASK_REQUIRE_SMTP_STATE;
+                        SCLogDebug("sig %u requires smtp app state (smtp event)", s->id);
+                        break;
+                    case ALPROTO_DNS:
+                        s->mask |= SIG_MASK_REQUIRE_DNS_STATE;
+                        SCLogDebug("sig %u requires dns app state (dns event)", s->id);
+                        break;
+                }
+                break;
+            }
+        }
+    }
+
     for (sm = s->sm_lists[DETECT_SM_LIST_MATCH] ; sm != NULL; sm = sm->next) {
         switch(sm->type) {
             case DETECT_FLOWBITS: