PF_RT_TAGNAME
snl_add_msg_attr_string(nw, PF_RT_TAGNAME, r->tagname);
{ .type = PF_RT_TAGNAME, .off = _OUT(r.tagname), .arg = (void *)PF_TAG_NAME_SIZE, .cb = snl_attr_copy_string },
{ .type = PF_RT_TAGNAME, .off = _OUT(tagname), .arg = (void *)PF_TAG_NAME_SIZE, .cb = nlattr_get_chara },
nlattr_add_string(nw, PF_RT_TAGNAME, rule->tagname);