[pkg-netfilter-team] Bug#950613: "nft -S list ruleset" should say "udp dport 514" is "syslog" (not "shell")

[Trent W. Buck]

Package: nftables
Version: 0.9.2-1
Severity: wishlist

Port 514 is a rare case where TCP and UDP have different service names.
Right now "nft -S list ruleset" gives the TCP name, which is confusing.
This is a very minor issue, but if it's easy to fix, please do so! :-)

Below is code demonstrating the problem.




Here is getent (libc-bin=2.28-10) resolving /etc/services (netbase=5.6):

    # getent services 514
    shell                 514/tcp cmd
    # getent services 514/tcp
    shell                 514/tcp cmd
    # getent services 514/udp
    syslog                514/udp

Here is nft resolving (I guess just "514", where I think it actually has enough info to resolve "514/udp"):

    # nft -S 'flush ruleset; add table x; add chain x y; add rule x y  udp dport 514; list ruleset'
    table ip x {
            chain y {
            }
    }

    # nft -S list ruleset
    table ip x {
            chain y {
                    udp dport "shell"
            }
    }


I don't know why the first "list ruleset" has the rule entirely missing.
I guess that's a separate bug (which I do not care about here).