PF_AA_NR
snl_add_msg_attr_u32(&nw, PF_AA_NR, pa->nr);
{ .type = PF_AA_NR, .off = 0, .cb = snl_attr_get_uint32 },
{ .type = PF_AA_NR, .off = _OUT(nr), .cb = snl_attr_get_uint32 },
snl_add_msg_attr_u32(&nw, PF_AA_NR, nr);
{ .type = PF_AA_NR, .off = _OUT(nr), .cb = nlattr_get_uint32 },
nlattr_add_u32(nw, PF_AA_NR, attrs.nr);
nlattr_add_u32(nw, PF_AA_NR, attrs.nr);