77 lines
1.4 KiB
C
77 lines
1.4 KiB
C
#ifndef _IPXE_STP_H
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#define _IPXE_STP_H
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/** @file
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*
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* Spanning Tree Protocol (STP)
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <stdint.h>
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#include <ipxe/if_ether.h>
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/** "Protocol" value for STP
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*
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* This is the concatenated {DSAP,SSAP} value used internally by iPXE
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* as the network-layer protocol for LLC frames.
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*/
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#define ETH_P_STP 0x4242
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/** A switch identifier */
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struct stp_switch {
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/** Priotity */
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uint16_t priority;
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/** MAC address */
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uint8_t mac[ETH_ALEN];
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} __attribute__ (( packed ));
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/** A Spanning Tree bridge protocol data unit */
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struct stp_bpdu {
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/** LLC DSAP */
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uint8_t dsap;
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/** LLC SSAP */
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uint8_t ssap;
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/** LLC control field */
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uint8_t control;
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/** Protocol ID */
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uint16_t protocol;
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/** Protocol version */
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uint8_t version;
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/** Message type */
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uint8_t type;
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/** Flags */
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uint8_t flags;
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/** Root switch */
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struct stp_switch root;
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/** Root path cost */
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uint32_t cost;
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/** Sender switch */
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struct stp_switch sender;
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/** Port */
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uint16_t port;
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/** Message age */
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uint16_t age;
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/** Maximum age */
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uint16_t max;
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/** Hello time */
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uint16_t hello;
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/** Forward delay */
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uint16_t delay;
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} __attribute__ (( packed ));
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/** Spanning Tree protocol ID */
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#define STP_PROTOCOL 0x0000
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/** Rapid Spanning Tree protocol version */
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#define STP_VERSION_RSTP 0x02
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/** Rapid Spanning Tree bridge PDU type */
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#define STP_TYPE_RSTP 0x02
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/** Port is forwarding */
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#define STP_FL_FORWARDING 0x20
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#endif /* _IPXE_STP_H */
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