Re: [PATCH net-next v2] selftests: net: Add kernel selftest for RFC 4884

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski [off-list ref]:

On Wed, 21 Jan 2026 13:46:44 +0200 you wrote:

RFC 4884 extended certain ICMP messages with a length attribute that
encodes the length of the "original datagram" field. This is needed so
that new information could be appended to these messages without
applications thinking that it is part of the "original datagram" field.

In version 5.9, the kernel was extended with two new socket options
(SOL_IP/IP_RECVERR_4884 and SOL_IPV6/IPV6_RECVERR_RFC4884) that allow
user space to retrieve this length which is basically the offset to the
ICMP Extension Structure at the end of the ICMP message. This is
required by user space applications that need to parse the information
contained in the ICMP Extension Structure. For example, the RFC 5837
extension for tracepath.

[...]

Here is the summary with links:
  - [net-next,v2] selftests: net: Add kernel selftest for RFC 4884
    https://git.kernel.org/netdev/net-next/c/d07d7c3dd944

You are awesome, thank you!
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