Creating a set with Type: nftables.TypeIFName seems to work, but the set acts strangely.

Sample code for set:

        conn.AddSet(&nftables.Set{
                Table:   table,
                Name:    "test_set",
                KeyType: nftables.TypeIFName,
        }, nil)

I also created a set called "manual_set" manually, and they both list:

nftables pkg set and nft cli set

% nft 'add set test_table manual_set { type ifname; }'
% nft list table test_table
table ip test_table {
        set test_set {
                type ifname
        }

        set manual_set {
                type ifname
        }
}

I then added an element into each set using nft cli and they both seem to succeed, however the set created by this package shows empty elements.

Added Elements

% nft 'add element test_table test_set { "wg0" }'
% nft 'add element test_table manual_set { "wg0" }'
% nft list table test_table                                                                      ☸ kubernetes-admin@50w_k8s:argocd 
table ip test_table {
        set test_set {
                type ifname
                elements = { "" }
        }

        set manual_set {
                type ifname
                elements = { "wg0" }
        }
}

Additionally, trying to add an element through this package fails for either table, though I do wonder if I've missed something in my code:

Attempt to add set element to both tables

        // github.com/google/nftables set and manual set
        testSet, _ := c.GetSetByName(table, "test_set")
        manualSet, _ := c.GetSetByName(table, "manual_set")

        // Second Element
        elements := []nftables.SetElement{{Key: []byte("wg1")}}

        c.SetAddElements(manualSet, elements)
        c.SetAddElements(testSet, elements)

        if err := c.Flush(); err != nil {
                log.Panicf("Error: %s", err)
        }

Running returns error: "conn.Receive: netlink receive: invalid argument"

I've tried a few different key types and have only had success with TypeFamilyIPv4.