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#ifndef _IPXE_NDP_H
#define _IPXE_NDP_H
/** @file
*
* Neighbour discovery protocol
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <ipxe/in.h>
#include <ipxe/ipv6.h>
#include <ipxe/icmpv6.h>
#include <ipxe/neighbour.h>
/** An NDP option */
struct ndp_option {
/** Type */
uint8_t type;
/** Length (in blocks of 8 bytes) */
uint8_t blocks;
/** Value */
uint8_t value[0];
} __attribute__ (( packed ));
/** NDP option block size */
#define NDP_OPTION_BLKSZ 8
/** An NDP header */
struct ndp_header {
/** ICMPv6 header */
struct icmpv6_header icmp;
/** Flags */
uint8_t flags;
/** Reserved */
uint8_t reserved[3];
/** Target address */
struct in6_addr target;
/** Options */
struct ndp_option option[0];
} __attribute__ (( packed ));
/** NDP router flag */
#define NDP_ROUTER 0x80
/** NDP solicited flag */
#define NDP_SOLICITED 0x40
/** NDP override flag */
#define NDP_OVERRIDE 0x20
/** NDP source link-layer address option */
#define NDP_OPT_LL_SOURCE 1
/** NDP target link-layer address option */
#define NDP_OPT_LL_TARGET 2
extern struct neighbour_discovery ndp_discovery;
/**
* Transmit packet, determining link-layer address via NDP
*
* @v iobuf I/O buffer
* @v netdev Network device
* @v net_dest Destination network-layer address
* @v net_source Source network-layer address
* @v ll_source Source link-layer address
* @ret rc Return status code
*/
static inline int ndp_tx ( struct io_buffer *iobuf, struct net_device *netdev,
const void *net_dest, const void *net_source,
const void *ll_source ) {
return neighbour_tx ( iobuf, netdev, &ipv6_protocol, net_dest,
&ndp_discovery, net_source, ll_source );
}
#endif /* _IPXE_NDP_H */
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