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- #ifndef _IPXE_NEIGHBOUR_H
- #define _IPXE_NEIGHBOUR_H
-
- /** @file
- *
- * Neighbour discovery
- *
- */
-
- FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
- #include <stdint.h>
- #include <ipxe/refcnt.h>
- #include <ipxe/list.h>
- #include <ipxe/netdevice.h>
- #include <ipxe/retry.h>
-
- /** A neighbour discovery protocol */
- struct neighbour_discovery {
- /** Name */
- const char *name;
- /**
- * Transmit neighbour discovery request
- *
- * @v netdev Network device
- * @v net_protocol Network-layer protocol
- * @v net_dest Destination network-layer address
- * @v net_source Source network-layer address
- * @ret rc Return status code
- */
- int ( * tx_request ) ( struct net_device *netdev,
- struct net_protocol *net_protocol,
- const void *net_dest, const void *net_source );
- };
-
- /** A neighbour cache entry */
- struct neighbour {
- /** Reference count */
- struct refcnt refcnt;
- /** List of neighbour cache entries */
- struct list_head list;
-
- /** Network device */
- struct net_device *netdev;
- /** Network-layer protocol */
- struct net_protocol *net_protocol;
- /** Network-layer destination address */
- uint8_t net_dest[MAX_NET_ADDR_LEN];
- /** Link-layer destination address */
- uint8_t ll_dest[MAX_LL_ADDR_LEN];
-
- /** Neighbour discovery protocol (if any) */
- struct neighbour_discovery *discovery;
- /** Network-layer source address (if any) */
- uint8_t net_source[MAX_NET_ADDR_LEN];
- /** Retransmission timer */
- struct retry_timer timer;
-
- /** Pending I/O buffers */
- struct list_head tx_queue;
- };
-
- /**
- * Test if neighbour cache entry has a valid link-layer address
- *
- * @v neighbour Neighbour cache entry
- * @ret has_ll_dest Neighbour cache entry has a valid link-layer address
- */
- static inline __attribute__ (( always_inline )) int
- neighbour_has_ll_dest ( struct neighbour *neighbour ) {
- return ( ! timer_running ( &neighbour->timer ) );
- }
-
- extern struct list_head neighbours;
-
- extern int neighbour_tx ( struct io_buffer *iobuf, struct net_device *netdev,
- struct net_protocol *net_protocol,
- const void *net_dest,
- struct neighbour_discovery *discovery,
- const void *net_source, const void *ll_source );
- extern int neighbour_update ( struct net_device *netdev,
- struct net_protocol *net_protocol,
- const void *net_dest, const void *ll_dest );
- extern int neighbour_define ( struct net_device *netdev,
- struct net_protocol *net_protocol,
- const void *net_dest, const void *ll_dest );
-
- #endif /* _IPXE_NEIGHBOUR_H */
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