Module icmpv6 

ICMPv6 protocol implementation

Provides ICMPv6 message handling for IPv6, including echo request/reply (ping6), destination unreachable, packet too big, time exceeded, and integration with NDP for neighbor/router discovery.

Structs

Icmpv6Header

ICMPv6 message header (4 bytes minimum)

Icmpv6Stats

ICMPv6 statistics

Constants

ICMPV6_ADDR_UNREACHABLE

Address unreachable

ICMPV6_ADMIN_PROHIBITED

Communication with destination administratively prohibited

ICMPV6_BEYOND_SCOPE

Beyond scope of source address

ICMPV6_DEST_UNREACHABLE

Destination Unreachable

ICMPV6_ECHO_HEADER_SIZE

ICMPv6 echo header size (type + code + checksum + id + seq = 8 bytes)

ICMPV6_ECHO_REPLY

Echo Reply (pong)

ICMPV6_ECHO_REQUEST

Echo Request (ping)

ICMPV6_FRAGMENT_REASSEMBLY_EXCEEDED

Fragment reassembly time exceeded

ICMPV6_HEADER_SIZE

Minimum ICMPv6 header size (type + code + checksum = 4 bytes)

ICMPV6_HOP_LIMIT_EXCEEDED

Hop limit exceeded in transit

ICMPV6_NEIGHBOR_ADVERT

Neighbor Advertisement

ICMPV6_NEIGHBOR_SOLICIT

Neighbor Solicitation

ICMPV6_NO_ROUTE

No route to destination

ICMPV6_PACKET_TOO_BIG

Packet Too Big

ICMPV6_PARAMETER_PROBLEM

Parameter Problem

ICMPV6_PORT_UNREACHABLE

Port unreachable

ICMPV6_ROUTER_ADVERT

Router Advertisement

ICMPV6_ROUTER_SOLICIT

Router Solicitation

ICMPV6_TIME_EXCEEDED

Time Exceeded

Functions

build_dest_unreachable

Build a Destination Unreachable message.

build_echo_reply

Build an ICMPv6 Echo Reply message.

build_echo_request

Build an ICMPv6 Echo Request message.

build_packet_too_big

Build a Packet Too Big message.

build_time_exceeded

Build a Time Exceeded message.

compute_icmpv6_checksum

Compute ICMPv6 checksum (delegates to ipv6 module).

get_last_echo_reply_seq

Get the last received echo reply sequence number.

handle_icmpv6

Handle an incoming ICMPv6 message.

init

Initialize the ICMPv6 subsystem.

reset_echo_reply_tracker

Reset the echo reply tracker.