mac-learning: Make data structures public.

[sliver-openvswitch.git] / lib / mac-learning.h

diff --git a/lib/mac-learning.h b/lib/mac-learning.h
index fc1d620..4e844b8 100644 (file)
--- a/lib/mac-learning.h
+++ b/lib/mac-learning.h
@@ -17,9 +17,38 @@
 #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 *,