/*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#define VLAN_PCP_SHIFT 13
#define VLAN_CFI 0x1000
+#define VLAN_CFI_SHIFT 12
/* Given the vlan_tci field from an 802.1Q header, in network byte order,
* returns the VLAN ID in host byte order. */
return (ntohs(vlan_tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT;
}
+/* Given the vlan_tci field from an 802.1Q header, in network byte order,
+ * returns the Canonical Format Indicator (CFI). */
+static inline int
+vlan_tci_to_cfi(ovs_be16 vlan_tci)
+{
+ return (vlan_tci & htons(VLAN_CFI)) != 0;
+}
+
#define VLAN_HEADER_LEN 4
struct vlan_header {
ovs_be16 vlan_tci; /* Lowest 12 bits are VLAN ID. */