Merged revision(s) 3044 from branches/releases/bacnet-stack-0-8-0:

Added BACnet/IPv6 datalink layer and example BACnet/IPv4 to BACnet/IPv6 router.
BVLC6 layer is working on Linux port without BBMD features yet. Win32 is implemented, untested.
Tested during BACnet North American Plugfest 2016.
........

bacnet-stack/include/vmac.h

@@ -0,0 +1,52 @@
+/**
+* @file
+* @author Steve Karg
+* @date 2016
+*/
+#ifndef VMAC_H
+#define VMAC_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/* define the max MAC as big as IPv6 + port number */
+#define VMAC_MAC_MAX 18
+/**
+* VMAC data structure
+*
+* @{
+*/
+struct vmac_data {
+    uint8_t mac[18];
+    uint8_t mac_len;
+};
+/** @} */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+    unsigned int VMAC_Count(void);
+    struct vmac_data *VMAC_Find_By_Key(uint32_t device_id);
+    bool VMAC_Find_By_Data(struct vmac_data *vmac, uint32_t *device_id);
+    bool VMAC_Add(uint32_t device_id, struct vmac_data *pVMAC);
+    bool VMAC_Delete(uint32_t device_id);
+    bool VMAC_Different(
+        struct vmac_data *vmac1,
+        struct vmac_data *vmac2);
+    bool VMAC_Match(
+        struct vmac_data *vmac1,
+        struct vmac_data *vmac2);
+    void VMAC_Cleanup(void);
+    void VMAC_Init(void);
+
+#ifdef TEST
+#include "ctest.h"
+    void testVMAC(
+        Test * pTest);
+#endif
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif