[Bug 1125] New: Setting bit mark according to result of lookup

[bugzilla-daemon at netfilter.org]

https://bugzilla.netfilter.org/show_bug.cgi?id=1125

            Bug ID: 1125
           Summary: Setting bit mark according to result of lookup
           Product: nftables
           Version: unspecified
          Hardware: x86_64
                OS: Gentoo
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: nft
          Assignee: pablo at netfilter.org
          Reporter: uzytkownik2 at gmail.com

I tried to set a mark according to interface it come through. My first attempt
was:

table bridge filter {
    map iface_to_mark {
        type iface_index: mark
        elements = {
            iface0: 0x1,
            iface1: 0x2,
            ...
        }
    }
    chain input {
        type filter hook input priority 0
        mark set mark or iif map @iface_to_mark
    }
}

However as RHS of | is not constant it is not allowed. I WAR by vmap jump
depending on interface and inlining constants but it is much less clearer (and
probably much less performant) then simple lookup and or.

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