/*
* Copyright (c) 2008, 2009 Nicira Networks.
*
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
+ * 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:
*
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ * 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.
*/
#ifndef MAC_LEARNING_H
#define MAC_LEARNING_H 1
+#include <time.h>
+#include "list.h"
#include "packets.h"
#include "tag.h"
+#define MAC_HASH_BITS 10
+#define MAC_HASH_MASK (MAC_HASH_SIZE - 1)
+#define MAC_HASH_SIZE (1u << MAC_HASH_BITS)
+
+#define MAC_MAX 1024
+
+/* A MAC learning table entry. */
+struct mac_entry {
+ struct list hash_node; /* Element in a mac_learning 'table' list. */
+ struct list lru_node; /* Element in 'lrus' or 'free' list. */
+ time_t expires; /* Expiration time. */
+ uint8_t mac[ETH_ADDR_LEN]; /* Known MAC address. */
+ uint16_t vlan; /* VLAN tag. */
+ int port; /* Port on which MAC was most recently seen. */
+ tag_type tag; /* Tag for this learning entry. */
+};
+
+/* MAC learning table. */
+struct mac_learning {
+ struct list free; /* Not-in-use entries. */
+ struct list lrus; /* In-use entries, least recently used at the
+ front, most recently used at the back. */
+ struct list table[MAC_HASH_SIZE]; /* Hash table. */
+ struct mac_entry entries[MAC_MAX]; /* All entries. */
+ uint32_t secret; /* Secret for */
+};
+
struct mac_learning *mac_learning_create(void);
void mac_learning_destroy(struct mac_learning *);
tag_type mac_learning_learn(struct mac_learning *,