diff options
Diffstat (limited to 'qemu/roms/ipxe/src/include/ipxe/neighbour.h')
-rw-r--r-- | qemu/roms/ipxe/src/include/ipxe/neighbour.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/include/ipxe/neighbour.h b/qemu/roms/ipxe/src/include/ipxe/neighbour.h new file mode 100644 index 000000000..f2a3946f1 --- /dev/null +++ b/qemu/roms/ipxe/src/include/ipxe/neighbour.h @@ -0,0 +1,88 @@ +#ifndef _IPXE_NEIGHBOUR_H +#define _IPXE_NEIGHBOUR_H + +/** @file + * + * Neighbour discovery + * + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#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 */ |