conntrack: fix protocol number parsing

Before this commit it was possible to successfully create a ct entry
passing -p 256 and -p some_nonsense.
In both cases an entry with the protocol=0 would be created.

Do not allow invalid protocol values to -p option.
Include testcases covering the issue.

Signed-off-by: Mikhail Sennikovsky <mikhail.sennikovskii@ionos.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

0 files changed, 0 insertions, 0 deletions