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diff --git a/lib/erl_interface/src/epmd/ei_epmd.h b/lib/erl_interface/src/epmd/ei_epmd.h
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+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 1998-2009. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+#ifndef _EI_EPMD_H
+#define _EI_EPMD_H
+
+#ifndef INADDR_LOOPBACK
+#define INADDR_LOOPBACK ((u_long) 0x7F000001)
+#endif
+
+#ifndef EI_DIST_HIGH
+#define EI_DIST_HIGH 5 /* R4 and later */
+#define EI_DIST_LOW 1 /* R3 and earlier */
+#endif
+
+#ifndef EPMD_PORT
+#define EPMD_PORT 4369
+#endif
+
+#ifndef EPMDBUF
+#define EPMDBUF 512
+#endif
+
+#ifndef EI_MYPROTO
+#define EI_MYPROTO 0 /* tcp/ip */
+#endif
+
+/* epmd r3 protocol */
+#ifndef EI_EPMD_ALIVE_REQ
+#define EI_EPMD_ALIVE_REQ 'a'
+#define EI_EPMD_ALIVE_OK_RESP 'Y'
+#define EI_EPMD_PORT_REQ 'p'
+#define EI_EPMD_STOP_REQ 's'
+#endif
+
+/* epmd r4 */
+#ifndef EI_EPMD_ALIVE2_REQ
+#define EI_EPMD_ALIVE2_REQ 120
+#define EI_EPMD_ALIVE2_RESP 121
+#define EI_EPMD_PORT2_REQ 122
+#define EI_EPMD_PORT2_RESP 119
+#endif
+
+/* internal functions */
+int ei_epmd_connect_tmo(struct in_addr *inaddr, unsigned ms);
+int ei_epmd_publish(int port, const char *alive);
+int ei_epmd_publish_tmo(int port, const char *alive, unsigned ms);
+int ei_epmd_port(struct in_addr *inaddr, const char *alive, int *dist);
+int ei_epmd_port_tmo(struct in_addr *inaddr, const char *alive, int *dist, unsigned ms);
+
+#endif /* _EI_EPMD_H */