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f7f3087cc5
Replace the existing partially-implemented IPv6 stack with a fresh implementation. This implementation is not yet complete. The IPv6 transmit and receive datapaths are functional (including fragment reassembly and parsing of arbitrary extension headers). NDP neighbour solicitations and advertisements are supported. ICMPv6 echo is supported. At present, only link-local addresses may be used, and there is no way to specify an IPv6 address as part of a URI (either directly or via a DNS lookup). Signed-off-by: Michael Brown <mcb30@ipxe.org>
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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