1 files changed, 60 insertions, 0 deletions
diff --git a/VNFs/DPPD-PROX/toeplitz.c b/VNFs/DPPD-PROX/toeplitz.c
new file mode 100644
index 00000000..62424579
--- /dev/null
+++ b/VNFs/DPPD-PROX/toeplitz.c
@@ -0,0 +1,60 @@
+/*
+// Copyright (c) 2010-2017 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#include <stdio.h>
+#include <stdint.h>
+#include "toeplitz.h"
+
+/* From XL710 Datasheet, 7.1.10 */
+
+uint8_t toeplitz_init_key[TOEPLITZ_KEY_LEN] =
+	{0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x8f, 0xb0,
+	 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
+	 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
+	 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
+	 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa,
+	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	 0x00, 0x00, 0x00, 0x00
+};
+
+uint32_t toeplitz_hash(uint8_t *buf_p, int buflen)
+{
+	uint32_t result = 0;
+	uint8_t *key_p = toeplitz_init_key;
+	uint8_t byte, *byte4_p = key_p+4;
+	int i, pos = 0;
+	int bit = 0;
+	uint32_t key_word = __builtin_bswap32(*(uint32_t *)key_p);
+
+	for (i = 0; i < buflen; ++i) {
+		byte = buf_p[i];
+		for (bit = 0; bit <= 7; ++bit) {
+			if (byte & (1 << (7 - bit))) {
+				result ^= key_word;
+			}
+			key_word = (key_word << 1) | ((*byte4_p >> (7 - bit)) & 1);
+		}
+		if (pos >= TOEPLITZ_KEY_LEN - 4) {
+			pos = 0;
+			byte4_p = key_p;
+		}
+		else {
+			pos++;
+			byte4_p++;
+		}
+	}
+	return result;
+}