Minor fixes against the last set of patches for #564, 565, 581 + fp automation.

Rename struct DetectFigureFPAndId_t_ to DetectFPAndItsId_ and move it's
definition from inside the function where it's used to the global namespace,
as requested on #suricata.

Rename DetectEngineContentModifiedBufferSetup to DetectEngineContentModifierBufferSetup.

Also rename DetectFigureFPAndId() to DetectSetFastPatternAndItsId().

Updated DetectSetFastPatternAndItsId() to not exit on failure and return error.

src/detect-engine-mpm.c

@@ -3346,17 +3346,26 @@ uint32_t DetectPatternGetIdV2(MpmPatternIdStore *ht, void *ctx, Signature *s, ui
     SCReturnUInt(id);
 }
 
-void DetectFigureFPAndId(DetectEngineCtx *de_ctx)
-{
-    typedef struct DetectFigureFPAndId_t_ {
-        PatIntId id;
-        uint16_t content_len;
-        uint32_t flags;
-        int sm_list;
+typedef struct DetectFPAndItsId_ {
+    PatIntId id;
+    uint16_t content_len;
+    uint32_t flags;
+    int sm_list;
 
-        uint8_t *content;
-    } DetectFigureFPAndId_t;
+    uint8_t *content;
+} DetectFPAndItsId;
 
+/**
+ * \brief Figured out the FP and their respective content ids for all the
+ *        sigs in the engine.
+ *
+ * \param de_ctx Detection engine context.
+ *
+ * \retval  0 On success.
+ * \retval -1 On failure.
+ */
+int DetectSetFastPatternAndItsId(DetectEngineCtx *de_ctx)
+{
     uint32_t struct_total_size = 0;
     uint32_t content_total_size = 0;
     Signature *s = NULL;
@@ -3365,7 +3374,7 @@ void DetectFigureFPAndId(DetectEngineCtx *de_ctx)
         s->mpm_sm = RetrieveFPForSigV2(s);
         if (s->mpm_sm != NULL) {
             DetectContentData *cd = (DetectContentData *)s->mpm_sm->ctx;
-            struct_total_size += sizeof(DetectFigureFPAndId_t);
+            struct_total_size += sizeof(DetectFPAndItsId);
             content_total_size += cd->content_len;
         }
     }
@@ -3373,17 +3382,17 @@ void DetectFigureFPAndId(DetectEngineCtx *de_ctx)
     /* array hash buffer - i've run out of ideas to name it */
     uint8_t *ahb = SCMalloc(sizeof(uint8_t) * (struct_total_size + content_total_size));
     if (ahb == NULL)
-        exit(EXIT_FAILURE);
+        return -1;
 
     PatIntId max_id = 0;
-    DetectFigureFPAndId_t *struct_offset = (DetectFigureFPAndId_t *)ahb;
+    DetectFPAndItsId *struct_offset = (DetectFPAndItsId *)ahb;
     uint8_t *content_offset = ahb + struct_total_size;
     for (s = de_ctx->sig_list; s != NULL; s = s->next) {
         if (s->mpm_sm != NULL) {
             int sm_list = SigMatchListSMBelongsTo(s, s->mpm_sm);
             BUG_ON(sm_list == -1);
             DetectContentData *cd = (DetectContentData *)s->mpm_sm->ctx;
-            DetectFigureFPAndId_t *dup = (DetectFigureFPAndId_t *)ahb;
+            DetectFPAndItsId *dup = (DetectFPAndItsId *)ahb;
             for (; dup != struct_offset; dup++) {
                 if (dup->content_len != cd->content_len ||
                     dup->sm_list != sm_list ||
@@ -3413,5 +3422,5 @@ void DetectFigureFPAndId(DetectEngineCtx *de_ctx)
     de_ctx->max_fp_id = max_id;
 
     SCFree(ahb);
-    return;
+    return 0;
 }

src/detect-engine-mpm.h

@@ -85,7 +85,16 @@ int SignatureHasStreamContent(Signature *);
 SigMatch *RetrieveFPForSig(Signature *s);
 SigMatch *RetrieveFPForSigV2(Signature *s);
 
-void DetectFigureFPAndId(DetectEngineCtx *de_ctx);
+/**
+ * \brief Figured out the FP and their respective content ids for all the
+ *        sigs in the engine.
+ *
+ * \param de_ctx Detection engine context.
+ *
+ * \retval  0 On success.
+ * \retval -1 On failure.
+ */
+int DetectSetFastPatternAndItsId(DetectEngineCtx *de_ctx);
 
 #endif /* __DETECT_ENGINE_MPM_H__ */
 

src/detect.c

@@ -473,7 +473,8 @@ int SigLoadSignatures(DetectEngineCtx *de_ctx, char *sig_file, int sig_file_excl
     }
 
     /* Setup the signature group lookup structure and pattern matchers */
-    SigGroupBuild(de_ctx);
+    if (SigGroupBuild(de_ctx) < 0)
+        goto end;
 
     ret = 0;
 
@@ -4379,11 +4380,13 @@ int SigAddressPrepareStage5(DetectEngineCtx *de_ctx) {
  * \param de_ctx Pointer to the Detection Engine Context whose Signatures have
  *               to be processed
  *
- * \retval 0 Always
+ * \retval  0 On Success.
+ * \retval -1 On failure.
  */
 int SigGroupBuild(DetectEngineCtx *de_ctx)
 {
-    DetectFigureFPAndId(de_ctx);
+    if (DetectSetFastPatternAndItsId(de_ctx) < 0)
+        return -1;
 
     /* if we are using single sgh_mpm_context then let us init the standard mpm
      * contexts using the mpm_ctx factory */