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2e5584e0f9
Expand IPV6_TCLASS to also cover IP_TOS. Expand IPV6_HOPLIMIT to also cover IP_TTL. Expand csmg_sender.c to allow setting IPv4 setsockopts. Also rename struct v6 to cmsg to match its expanded scope. Don't bother updating all occurrences of tclass and hoplimit. Rename cmsg_ipv6.sh to cmsg_ip.sh to match the expanded scope. Be careful around the subtle API difference between TCLASS and TOS. IP_TOS includes ECN bits. Add a test to verify that these are masked when making routing decisions. Diff is more concise with --word-diff Signed-off-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250225022431.2083926-3-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>