71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
#ifndef _IPXE_VLAN_H
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#define _IPXE_VLAN_H
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/**
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* @file
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*
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* Virtual LANs
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/** A VLAN header */
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struct vlan_header {
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/** Tag control information */
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uint16_t tci;
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/** Encapsulated protocol */
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uint16_t net_proto;
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} __attribute__ (( packed ));
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/**
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* Extract VLAN tag from tag control information
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*
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* @v tci Tag control information
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* @ret tag VLAN tag
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*/
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#define VLAN_TAG( tci ) ( (tci) & 0x0fff )
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/**
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* Extract VLAN priority from tag control information
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*
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* @v tci Tag control information
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* @ret priority Priority
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*/
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#define VLAN_PRIORITY( tci ) ( (tci) >> 13 )
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/**
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* Construct VLAN tag control information
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*
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* @v tag VLAN tag
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* @v priority Priority
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* @ret tci Tag control information
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*/
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#define VLAN_TCI( tag, priority ) ( ( (priority) << 13 ) | (tag) )
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/**
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* Check VLAN tag is valid
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*
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* @v tag VLAN tag
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* @ret is_valid VLAN tag is valid
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*/
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#define VLAN_TAG_IS_VALID( tag ) ( (tag) < 0xfff )
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/**
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* Check VLAN priority is valid
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*
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* @v priority VLAN priority
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* @ret is_valid VLAN priority is valid
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*/
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#define VLAN_PRIORITY_IS_VALID( priority ) ( (priority) <= 7 )
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extern struct net_device * vlan_find ( struct net_device *trunk,
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unsigned int tag );
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extern unsigned int vlan_tag ( struct net_device *netdev );
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extern int vlan_can_be_trunk ( struct net_device *trunk );
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extern int vlan_create ( struct net_device *trunk, unsigned int tag,
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unsigned int priority );
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extern int vlan_destroy ( struct net_device *netdev );
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#endif /* _IPXE_VLAN_H */
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