Initial commit of Hyperscan

2025-10-10 16:22:22 +03:00 · 2015-10-20 09:13:35 +11:00
commit 904e436f11
610 changed files with 213627 additions and 0 deletions
--- a/src/nfa/accel.h
+++ b/src/nfa/accel.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2015, Intel Corporation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  * Neither the name of Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** \file
+ * \brief Acceleration: data structures and common definitions.
+ */
+
+#ifndef ACCEL_H
+#define ACCEL_H
+
+#include "ue2common.h"
+
+/* run time defs */
+#define BAD_ACCEL_DIST      4
+#define SMALL_ACCEL_PENALTY 8
+#define BIG_ACCEL_PENALTY   32
+
+/// Minimum length of the scan buffer for us to attempt acceleration.
+#define ACCEL_MIN_LEN       16
+
+enum AccelType {
+    ACCEL_NONE,
+    ACCEL_VERM,
+    ACCEL_VERM_NOCASE,
+    ACCEL_DVERM,
+    ACCEL_DVERM_NOCASE,
+    ACCEL_RVERM,
+    ACCEL_RVERM_NOCASE,
+    ACCEL_RDVERM,
+    ACCEL_RDVERM_NOCASE,
+    ACCEL_REOD,
+    ACCEL_REOD_NOCASE,
+    ACCEL_RDEOD,
+    ACCEL_RDEOD_NOCASE,
+    ACCEL_SHUFTI,
+    ACCEL_DSHUFTI,
+    ACCEL_TRUFFLE,
+    ACCEL_RED_TAPE
+};
+
+/** \brief Structure for accel framework. */
+union AccelAux {
+    u8 accel_type;
+    struct {
+        u8 accel_type;
+        u8 offset;
+    } generic;
+    struct {
+        u8 accel_type;
+        u8 offset;
+        u8 c; // uppercase if nocase
+    } verm;
+    struct {
+        u8 accel_type;
+        u8 offset;
+        u8 c1; // uppercase if nocase
+        u8 c2; // uppercase if nocase
+    } dverm;
+    struct {
+        u8 accel_type;
+        u8 offset;
+        m128 lo;
+        m128 hi;
+    } shufti;
+    struct {
+        u8 accel_type;
+        u8 offset;
+        m128 lo1;
+        m128 hi1;
+        m128 lo2;
+        m128 hi2;
+    } dshufti;
+    struct {
+        u8 accel_type;
+        u8 offset;
+        m128 mask1;
+        m128 mask2;
+    } truffle;
+};
+
+/**
+ * Runs the specified acceleration scheme between c and c_end, returns a point
+ * such that the acceleration scheme does not match before.
+ */
+const u8 *run_accel(const union AccelAux *accel, const u8 *c, const u8 *c_end);
+
+#endif