Module icmp 

ICMPv6 message handling for FIPS.

Implements ICMPv6 error message generation per RFC 4443. Currently supports Destination Unreachable (Type 1) for packets that cannot be routed.

Enums

DestUnreachableCode

ICMPv6 Destination Unreachable codes.

Icmpv6Type

ICMPv6 message types.

Constants

FIPS_IPV6_OVERHEAD

FIPS encapsulation overhead for compressed IPv6 shim traffic (port 256).

FIPS_OVERHEAD

FIPS base encapsulation overhead for DataPacket (excluding port payload).

IPPROTO_ICMPV6

IPv6 header next-header value for ICMPv6.

Functions

build_dest_unreachable

Build an ICMPv6 Destination Unreachable response.

build_packet_too_big

Build an ICMPv6 Packet Too Big response.

effective_ipv6_mtu

Calculate the effective IPv6 MTU for FIPS-encapsulated traffic.

should_send_icmp_error

Check if we should send an ICMPv6 error for this packet.