netfilter: conntrack: get rid of tuple in helper definitions

Leftover from the days when the kernel did automatic assignment of helpers
based on a pre-registered / well-known-port.

This helper autoassign was removed from the kernel, so all we really
need are the l3 and l4 protocol numbers.

In the broadcast helper, the only remaining consumer of the port number is
removed.  AFAICS its not needed: The expectation is populated from the
control connection reply tuple, so the src port is the original directions
destination (snmp/161 for example).

LLM complained about silent l3num (u16) -> nfproto (u8) truncation, so
add a netlink policy validation to reject large NFPROTO values upfront.

Assisted-by: Claude:claude-sonnet-4-6
Signed-off-by: Florian Westphal <fw@strlen.de>

0 files changed, 0 insertions, 0 deletions