/**
* \brief Inits the context to be used by the Reference Config parsing API.
*
* This function initializes the hash table to be used by the Detection
* Engine Context to hold the data from reference.config file,
* obtains the file descriptor to parse the reference.config file, and
* inits the regex used to parse the lines from reference.config file.
*
* \param de_ctx Pointer to the Detection Engine Context.
*
* \retval 0 On success.
* \retval -1 On failure.
*/
static int SCRConfInitContext(DetectEngineCtx *de_ctx)
{
char *filename = NULL;
const char *eb = NULL;
int eo;
int opts = 0;
/* init the hash table to be used by the reference config references */
de_ctx->reference_conf_ht = HashTableInit(128, SCRConfReferenceHashFunc,
SCRConfReferenceHashCompareFunc,
SCRConfReferenceHashFree);
if (de_ctx->reference_conf_ht == NULL) {
SCLogError(SC_ERR_HASH_TABLE_INIT, "Error initializing the hash "
"table");
return -1;
}
/* if it is not NULL, use the file descriptor. The hack so that we can
* avoid using a dummy reference file for testing purposes and
* instead use an input stream against a buffer containing the
* reference strings */
if (fd == NULL) {
filename = SCRConfGetConfFilename();
if ((fd = fopen(filename, "r")) == NULL) {
SCLogError(SC_ERR_FOPEN, "Error opening file: \"%s\": %s", filename,
strerror(errno));
goto error;
}
}
regex = pcre_compile(SC_RCONF_REGEX, opts, &eb, &eo, NULL);
if (regex == NULL) {
SCLogDebug("Compile of \"%s\" failed at offset %" PRId32 ": %s",
SC_RCONF_REGEX, eo, eb);
goto error;
}
regex_study = pcre_study(regex, 0, &eb);
if (eb != NULL) {
SCLogDebug("pcre study failed: %s", eb);
goto error;
}
return 0;
error:
if (de_ctx->reference_conf_ht != NULL) {
HashTableFree(de_ctx->reference_conf_ht);
de_ctx->reference_conf_ht = NULL;
}
if (fd != NULL) {
fclose(fd);
fd = NULL;
}
return -1;
}
/**
* \brief Inits the context to be used by the Reference Config parsing API.
*
* This function initializes the hash table to be used by the Detection
* Engine Context to hold the data from reference.config file,
* obtains the file descriptor to parse the reference.config file, and
* inits the regex used to parse the lines from reference.config file.
*
* \param de_ctx Pointer to the Detection Engine Context.
*
* \retval 0 On success.
* \retval -1 On failure.
*/
static FILE *SCRConfInitContextAndLocalResources(DetectEngineCtx *de_ctx, FILE *fd)
{
char *filename = NULL;
/* init the hash table to be used by the reference config references */
de_ctx->reference_conf_ht = HashTableInit(128, SCRConfReferenceHashFunc,
SCRConfReferenceHashCompareFunc,
SCRConfReferenceHashFree);
if (de_ctx->reference_conf_ht == NULL) {
SCLogError(SC_ERR_HASH_TABLE_INIT, "Error initializing the hash "
"table");
goto error;
}
/* if it is not NULL, use the file descriptor. The hack so that we can
* avoid using a dummy reference file for testing purposes and
* instead use an input stream against a buffer containing the
* reference strings */
if (fd == NULL) {
filename = SCRConfGetConfFilename();
if ((fd = fopen(filename, "r")) == NULL) {
#ifdef UNITTESTS
if (RunmodeIsUnittests())
goto error; // silently fail
#endif
SCLogError(SC_ERR_FOPEN, "Error opening file: \"%s\": %s", filename,
strerror(errno));
goto error;
}
}
return fd;
error:
if (de_ctx->reference_conf_ht != NULL) {
HashTableFree(de_ctx->reference_conf_ht);
de_ctx->reference_conf_ht = NULL;
}
if (fd != NULL) {
fclose(fd);
fd = NULL;
}
return NULL;
}
