X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fmac-learning.h;h=e2ee74ba4c7afff681347fe2af7ba94f6f6888eb;hb=3f355f47f8e7343e909ccfa854454d667baf3c38;hp=fc1d6204050fc695530f97981bbf5039196f6515;hpb=064af42167bf4fc9aaea2702d80ce08074b889c0;p=openvswitch

diff --git a/lib/mac-learning.h b/lib/mac-learning.h
index fc1d6204..e2ee74ba 100644
--- a/lib/mac-learning.h
+++ b/lib/mac-learning.h
@@ -1,25 +1,59 @@
 /*
  * 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 2048
+
+/* Time, in seconds, before expiring a mac_entry due to inactivity. */
+#define MAC_ENTRY_IDLE_TIME 60
+
+/* 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. */
+};
+
+int mac_entry_age(const struct mac_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 *,