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#ifndef _IPXE_VLAN_H
#define _IPXE_VLAN_H
/**
* @file
*
* Virtual LANs
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
/** A VLAN header */
struct vlan_header {
/** Tag control information */
uint16_t tci;
/** Encapsulated protocol */
uint16_t net_proto;
} __attribute__ (( packed ));
/**
* Extract VLAN tag from tag control information
*
* @v tci Tag control information
* @ret tag VLAN tag
*/
#define VLAN_TAG( tci ) ( (tci) & 0x0fff )
/**
* Extract VLAN priority from tag control information
*
* @v tci Tag control information
* @ret priority Priority
*/
#define VLAN_PRIORITY( tci ) ( (tci) >> 13 )
/**
* Construct VLAN tag control information
*
* @v tag VLAN tag
* @v priority Priority
* @ret tci Tag control information
*/
#define VLAN_TCI( tag, priority ) ( ( (priority) << 13 ) | (tag) )
/**
* Check VLAN tag is valid
*
* @v tag VLAN tag
* @ret is_valid VLAN tag is valid
*/
#define VLAN_TAG_IS_VALID( tag ) ( (tag) < 0xfff )
/**
* Check VLAN priority is valid
*
* @v priority VLAN priority
* @ret is_valid VLAN priority is valid
*/
#define VLAN_PRIORITY_IS_VALID( priority ) ( (priority) <= 7 )
extern struct net_device * vlan_find ( struct net_device *trunk,
unsigned int tag );
extern int vlan_can_be_trunk ( struct net_device *trunk );
extern int vlan_create ( struct net_device *trunk, unsigned int tag,
unsigned int priority );
extern int vlan_destroy ( struct net_device *netdev );
#endif /* _IPXE_VLAN_H */
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