diff --git a/include/re_tls.h b/include/re_tls.h
index 05b3c93..09ad028 100644
--- a/include/re_tls.h
+++ b/include/re_tls.h
@@ -54,6 +54,8 @@
 		     uint8_t *srv_key, size_t srv_key_size);
 const char *tls_cipher_name(const struct tls_conn *tc);
 int tls_set_ciphers(struct tls *tls, const char *cipherv[], size_t count);
+int tls_set_dh_params_pem(struct tls *tls, const char *pem, size_t len);
+int tls_set_dh_params_der(struct tls *tls, const uint8_t *der, size_t len);
 int tls_set_servername(struct tls_conn *tc, const char *servername);
 
 
@@ -66,6 +68,9 @@
 /* UDP (DTLS) */
 
 typedef void (dtls_conn_h)(const struct sa *peer, void *arg);
+typedef int (dtls_send_h)(struct tls_conn *tc, const struct sa *dst,
+		struct mbuf *mb, void *arg);
+typedef size_t (dtls_mtu_h)(struct tls_conn *tc, void *arg);
 typedef void (dtls_estab_h)(void *arg);
 typedef void (dtls_recv_h)(struct mbuf *mb, void *arg);
 typedef void (dtls_close_h)(int err, void *arg);
@@ -75,8 +80,13 @@
 int dtls_listen(struct dtls_sock **sockp, const struct sa *laddr,
 		struct udp_sock *us, uint32_t htsize, int layer,
 		dtls_conn_h *connh, void *arg);
+int dtls_socketless(struct dtls_sock **sockp, uint32_t htsize,
+		dtls_conn_h *connh, dtls_send_h *sendh, dtls_mtu_h *mtuh,
+		void *arg);
 struct udp_sock *dtls_udp_sock(struct dtls_sock *sock);
 void dtls_set_mtu(struct dtls_sock *sock, size_t mtu);
+size_t dtls_headroom(struct dtls_sock *sock);
+void dtls_set_headroom(struct dtls_sock *sock, size_t headroom);
 int dtls_connect(struct tls_conn **ptc, struct tls *tls,
 		 struct dtls_sock *sock, const struct sa *peer,
 		 dtls_estab_h *estabh, dtls_recv_h *recvh,
@@ -86,6 +96,7 @@
 		dtls_estab_h *estabh, dtls_recv_h *recvh,
 		dtls_close_h *closeh, void *arg);
 int dtls_send(struct tls_conn *tc, struct mbuf *mb);
+bool dtls_receive(struct dtls_sock *sock, struct sa *src, struct mbuf *mb);
 void dtls_set_handlers(struct tls_conn *tc, dtls_estab_h *estabh,
 		       dtls_recv_h *recvh, dtls_close_h *closeh, void *arg);
 const struct sa *dtls_peer(const struct tls_conn *tc);