1 files changed, 60 insertions, 0 deletions
diff --git a/src/util-hyperscan.c b/src/util-hyperscan.c
new file mode 100644
index 0000000..c5886d6
--- /dev/null
+++ b/src/util-hyperscan.c
@@ -0,0 +1,60 @@
+/* Copyright (C) 2016 Open Information Security Foundation
+ *
+ * You can copy, redistribute or modify this Program under the terms of
+ * the GNU General Public License version 2 as published by the Free
+ * Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/**
+ * \file
+ *
+ * \author Justin Viiret <justin.viiret@intel.com>
+ *
+ * Support functions for Hyperscan library integration.
+ */
+
+#include "suricata-common.h"
+#include "suricata.h"
+
+#ifdef BUILD_HYPERSCAN
+#include "util-hyperscan.h"
+
+/**
+ * \internal
+ * \brief Convert a pattern into a regex string accepted by the Hyperscan
+ * compiler.
+ *
+ * For simplicity, we just take each byte of the original pattern and render it
+ * with a hex escape (i.e. ' ' -> "\x20")/
+ */
+char *HSRenderPattern(const uint8_t *pat, uint16_t pat_len)
+{
+    if (pat == NULL) {
+        return NULL;
+    }
+    const size_t hex_len = (pat_len * 4) + 1;
+    char *str = SCMalloc(hex_len);
+    if (str == NULL) {
+        return NULL;
+    }
+    memset(str, 0, hex_len);
+    char *sp = str;
+    for (uint16_t i = 0; i < pat_len; i++) {
+        snprintf(sp, 5, "\\x%02x", pat[i]);
+        sp += 4;
+    }
+    *sp = '\0';
+    return str;
+}
+
+#endif /* BUILD_HYPERSCAN */