diff --git a/include/re_udp.h b/include/re_udp.h
new file mode 100644
index 0000000..f744f2f
--- /dev/null
+++ b/include/re_udp.h
@@ -0,0 +1,59 @@
+/**
+ * @file re_udp.h  Interface to User Datagram Protocol
+ *
+ * Copyright (C) 2010 Creytiv.com
+ */
+
+
+struct sa;
+struct udp_sock;
+
+
+/**
+ * Defines the UDP Receive handler
+ *
+ * @param src Source address
+ * @param mb  Datagram buffer
+ * @param arg Handler argument
+ */
+typedef void (udp_recv_h)(const struct sa *src, struct mbuf *mb, void *arg);
+typedef void (udp_error_h)(int err, void *arg);
+
+
+int  udp_listen(struct udp_sock **usp, const struct sa *local,
+		udp_recv_h *rh, void *arg);
+int  udp_connect(struct udp_sock *us, const struct sa *peer);
+int  udp_send(struct udp_sock *us, const struct sa *dst, struct mbuf *mb);
+int  udp_send_anon(const struct sa *dst, struct mbuf *mb);
+int  udp_local_get(const struct udp_sock *us, struct sa *local);
+int  udp_setsockopt(struct udp_sock *us, int level, int optname,
+		    const void *optval, uint32_t optlen);
+int  udp_sockbuf_set(struct udp_sock *us, int size);
+void udp_rxsz_set(struct udp_sock *us, size_t rxsz);
+void udp_rxbuf_presz_set(struct udp_sock *us, size_t rx_presz);
+void udp_handler_set(struct udp_sock *us, udp_recv_h *rh, void *arg);
+void udp_error_handler_set(struct udp_sock *us, udp_error_h *eh);
+int  udp_thread_attach(struct udp_sock *us);
+void udp_thread_detach(struct udp_sock *us);
+int  udp_sock_fd(const struct udp_sock *us, int af);
+
+int  udp_multicast_join(struct udp_sock *us, const struct sa *group);
+int  udp_multicast_leave(struct udp_sock *us, const struct sa *group);
+
+
+/* Helper API */
+typedef bool (udp_helper_send_h)(int *err, struct sa *dst,
+				 struct mbuf *mb, void *arg);
+typedef bool (udp_helper_recv_h)(struct sa *src,
+				 struct mbuf *mb, void *arg);
+
+struct udp_helper;
+
+
+int udp_register_helper(struct udp_helper **uhp, struct udp_sock *us,
+			int layer,
+			udp_helper_send_h *sh, udp_helper_recv_h *rh,
+			void *arg);
+int udp_send_helper(struct udp_sock *us, const struct sa *dst,
+		    struct mbuf *mb, struct udp_helper *uh);
+struct udp_helper *udp_helper_find(const struct udp_sock *us, int layer);