Help Adding new helpers

[GEverding]

Hi

I'm experimenting with porting the xdp_synproxy_kern.c to aya and a couple of helper functions are missing like bpf_xdp_ct_lookup, bpf_skb_ct_lookup, 'bpf_ct_release'.

How hard is it to add support for new functions?

[alessandrod]

Those are kfuncs, not helpers, so they require BTF support, which is being worked on here https://github.com/aya-rs/bpf-linker/tree/feature/fix-di. Once that branch gets merged, it should be fairly easy to add support for them.

[sanmai-NL]

See also: #432. @alessandrod @GEverding Are you okay with closing this issue in favor of #432?