diff options
Diffstat (limited to 'roms/ipxe/src/include/ipxe/ndp.h')
| -rw-r--r-- | roms/ipxe/src/include/ipxe/ndp.h | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/roms/ipxe/src/include/ipxe/ndp.h b/roms/ipxe/src/include/ipxe/ndp.h new file mode 100644 index 000000000..1815236f5 --- /dev/null +++ b/roms/ipxe/src/include/ipxe/ndp.h @@ -0,0 +1,206 @@ +#ifndef _IPXE_NDP_H +#define _IPXE_NDP_H + +/** @file + * + * Neighbour discovery protocol + * + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +#include <stdint.h> +#include <ipxe/in.h> +#include <ipxe/ipv6.h> +#include <ipxe/icmpv6.h> +#include <ipxe/neighbour.h> + +/** An NDP option header */ +struct ndp_option_header { + /** Type */ + uint8_t type; + /** Length (in blocks of 8 bytes) */ + uint8_t blocks; +} __attribute__ (( packed )); + +/** NDP option block size */ +#define NDP_OPTION_BLKSZ 8U + +/** NDP source link-layer address option */ +#define NDP_OPT_LL_SOURCE 1 + +/** NDP target link-layer address option */ +#define NDP_OPT_LL_TARGET 2 + +/** NDP source or target link-layer address option */ +struct ndp_ll_addr_option { + /** NDP option header */ + struct ndp_option_header header; + /** Link-layer address */ + uint8_t ll_addr[0]; +} __attribute__ (( packed )); + +/** NDP prefix information option */ +#define NDP_OPT_PREFIX 3 + +/** NDP prefix information */ +struct ndp_prefix_information_option { + /** NDP option header */ + struct ndp_option_header header; + /** Prefix length */ + uint8_t prefix_len; + /** Flags */ + uint8_t flags; + /** Valid lifetime */ + uint32_t valid; + /** Preferred lifetime */ + uint32_t preferred; + /** Reserved */ + uint32_t reserved; + /** Prefix */ + struct in6_addr prefix; +} __attribute__ (( packed )); + +/** NDP on-link flag */ +#define NDP_PREFIX_ON_LINK 0x80 + +/** NDP autonomous address configuration flag */ +#define NDP_PREFIX_AUTONOMOUS 0x40 + +/** NDP recursive DNS server option */ +#define NDP_OPT_RDNSS 25 + +/** NDP recursive DNS server */ +struct ndp_rdnss_option { + /** NDP option header */ + struct ndp_option_header header; + /** Reserved */ + uint16_t reserved; + /** Lifetime */ + uint32_t lifetime; + /** Addresses */ + struct in6_addr addresses[0]; +} __attribute__ (( packed )); + +/** NDP DNS search list option */ +#define NDP_OPT_DNSSL 31 + +/** NDP DNS search list */ +struct ndp_dnssl_option { + /** NDP option header */ + struct ndp_option_header header; + /** Reserved */ + uint16_t reserved; + /** Lifetime */ + uint32_t lifetime; + /** Domain names */ + uint8_t names[0]; +} __attribute__ (( packed )); + +/** An NDP option */ +union ndp_option { + /** Option header */ + struct ndp_option_header header; + /** Source or target link-layer address option */ + struct ndp_ll_addr_option ll_addr; + /** Prefix information option */ + struct ndp_prefix_information_option prefix; + /** Recursive DNS server option */ + struct ndp_rdnss_option rdnss; + /** DNS search list option */ + struct ndp_dnssl_option dnssl; +} __attribute__ (( packed )); + +/** An NDP neighbour solicitation or advertisement header */ +struct ndp_neighbour_header { + /** ICMPv6 header */ + struct icmp_header icmp; + /** Flags */ + uint8_t flags; + /** Reserved */ + uint8_t reserved[3]; + /** Target address */ + struct in6_addr target; + /** Options */ + union ndp_option option[0]; +} __attribute__ (( packed )); + +/** NDP router flag */ +#define NDP_NEIGHBOUR_ROUTER 0x80 + +/** NDP solicited flag */ +#define NDP_NEIGHBOUR_SOLICITED 0x40 + +/** NDP override flag */ +#define NDP_NEIGHBOUR_OVERRIDE 0x20 + +/** An NDP router advertisement header */ +struct ndp_router_advertisement_header { + /** ICMPv6 header */ + struct icmp_header icmp; + /** Current hop limit */ + uint8_t hop_limit; + /** Flags */ + uint8_t flags; + /** Router lifetime */ + uint16_t lifetime; + /** Reachable time */ + uint32_t reachable; + /** Retransmission timer */ + uint32_t retransmit; + /** Options */ + union ndp_option option[0]; +} __attribute__ (( packed )); + +/** NDP managed address configuration */ +#define NDP_ROUTER_MANAGED 0x80 + +/** NDP other configuration */ +#define NDP_ROUTER_OTHER 0x40 + +/** An NDP router solicitation header */ +struct ndp_router_solicitation_header { + /** ICMPv6 header */ + struct icmp_header icmp; + /** Reserved */ + uint32_t reserved; + /** Options */ + union ndp_option option[0]; +} __attribute__ (( packed )); + +/** An NDP header */ +union ndp_header { + /** ICMPv6 header */ + struct icmp_header icmp; + /** Neighbour solicitation or advertisement header */ + struct ndp_neighbour_header neigh; + /** Router solicitation header */ + struct ndp_router_solicitation_header rsol; + /** Router advertisement header */ + struct ndp_router_advertisement_header radv; +} __attribute__ (( packed )); + +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 ); +} + +/** NDP settings block name */ +#define NDP_SETTINGS_NAME "ndp" + +#endif /* _IPXE_NDP_H */ |