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