Hi Serguei, On Mon, Feb 17, 2020 at 10:42:48AM -0500, sbezverk wrote: > Thank you for letting me know, I checked golang unix package and I did not find definition for NFTNL_UDATA_RULE_COMMENT. That explains why I did not use it. > Could you please point me where UDATA relate types and subtypes are defined, so I could replicate them in go. Please check libnftnl/udata.h. In general, all NFTNL_* named defines belong to libnftnl. Cheers, Phil