Module ipv6 

IPv6 protocol implementation

Provides IPv6 packet construction, parsing, address utilities, NDP (Neighbor Discovery Protocol) cache management, and dual-stack configuration for simultaneous IPv4/IPv6 networking.

Structs

DualStackConfig

Dual-stack network configuration

Ipv6Header

IPv6 packet header (40 bytes fixed)

Ipv6InterfaceAddr

IPv6 interface address with prefix length and scope

Ipv6State

Complete IPv6 subsystem state

Ipv6Stats

IPv6 statistics

NdpCache

NDP neighbor cache

NdpEntry

NDP neighbor cache entry

Enums

Ipv6Scope

IPv6 address scope

NdpState

NDP neighbor cache entry state (RFC 4861 Section 7.3.2)

Constants

DEFAULT_HOP_LIMIT

Default hop limit (equivalent to IPv4 TTL)

ETHERTYPE_IPV6

EtherType for IPv6

ICMPV6_NEIGHBOR_ADVERT

ICMPV6_NEIGHBOR_SOLICIT

ICMPV6_REDIRECT

ICMPV6_ROUTER_ADVERT

ICMPV6_ROUTER_SOLICIT

ICMPv6 NDP message types

IPV6_HEADER_SIZE

IPv6 header size in bytes (fixed, unlike IPv4)

IPV6_MIN_MTU

IPv6 minimum MTU (all links must support at least 1280 bytes)

IPV6_VERSION

IPv6 version number

NDP_OPT_MTU

NDP_OPT_PREFIX_INFO

NDP_OPT_SOURCE_LINK_ADDR

NDP option types

NDP_OPT_TARGET_LINK_ADDR

NEXT_HEADER_FRAGMENT

NEXT_HEADER_HOP_BY_HOP

Next header protocol numbers

NEXT_HEADER_ICMPV6

NEXT_HEADER_NO_NEXT

NEXT_HEADER_TCP

NEXT_HEADER_UDP

Functions

build_ipv6

Build an IPv6 packet with the given parameters.

compute_icmpv6_checksum

Compute ICMPv6 checksum using the IPv6 pseudo-header.

flush_ndp_cache

Flush the NDP cache.

format_ipv6

Format an IPv6 address as a human-readable string.

format_ipv6_compressed

Format an IPv6 address with zero-compression (::).

get_config

Get the current dual-stack configuration.

get_hop_limit

Get the current hop limit.

get_ndp_entries

Get NDP cache entries for display.

get_stats

Get IPv6 statistics.

handle_ndp

Handle an incoming NDP message.

init

Initialize the IPv6 subsystem.

is_global_unicast

Check if an IPv6 address is a global unicast address (2000::/3)

is_ipv4_mapped

Check if an IPv6 address is an IPv4-mapped IPv6 address (::ffff:0:0/96)

is_link_local

Check if an IPv6 address is link-local (fe80::/10)

is_loopback

Check if an IPv6 address is the loopback address (::1)

is_multicast

Check if an IPv6 address is multicast (ff00::/8)

is_unique_local

Check if an IPv6 address is a unique local address (fc00::/7)

is_unspecified

Check if an IPv6 address is the unspecified address (::)

link_local_from_mac

Generate a link-local address from a MAC address using EUI-64.

multicast_mac

Convert a multicast IPv6 address to its Ethernet multicast MAC address.

ndp_advertise

Build a Neighbor Advertisement message.

ndp_lookup

Look up a neighbor’s MAC address in the NDP cache.

ndp_router_solicit

Build a Router Solicitation message.

ndp_solicit

Build a Neighbor Solicitation message.

parse_ipv6

Parse an IPv6 packet from raw bytes.

process_packet

Process an incoming IPv6 packet (dispatched from the Ethernet layer).

select_source_address

Get the source address appropriate for a given destination.

send

Send an IPv6 packet.

solicited_node_multicast

Compute the solicited-node multicast address for a given unicast address.

tick

Advance the NDP tick counter (called periodically by timer)