void ndr_print_dns_string(struct ndr_print *ndr,
			  const char *name,
			  const char *s);
enum ndr_err_code ndr_pull_dns_string(struct ndr_pull *ndr,
				      int ndr_flags,
				      const char **s);
enum ndr_err_code ndr_push_dns_string(struct ndr_push *ndr,
				      int ndr_flags,
				      const char *s);
enum ndr_err_code ndr_push_dns_res_rec(struct ndr_push *ndr,
				       int ndr_flags,
				       const struct dns_res_rec *r);
enum ndr_err_code ndr_pull_dns_res_rec(struct ndr_pull *ndr,
				       int ndr_flags,
				       struct dns_res_rec *r);