diff --git a/bacnet-stack/dlmstp.c b/bacnet-stack/dlmstp.c
new file mode 100644
index 00000000..d9fa490b
--- /dev/null
+++ b/bacnet-stack/dlmstp.c
@@ -0,0 +1,85 @@
+/*####COPYRIGHTBEGIN####
+ -------------------------------------------
+ Copyright (C) 2005 Steve Karg
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ as published by the Free Software Foundation; either version 2
+ of the License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to:
+ The Free Software Foundation, Inc.
+ 59 Temple Place - Suite 330
+ Boston, MA  02111-1307
+ USA.
+
+ As a special exception, if other files instantiate templates or
+ use macros or inline functions from this file, or you compile
+ this file and link it with other works to produce a work based
+ on this file, this file does not by itself cause the resulting
+ work to be covered by the GNU General Public License. However
+ the source code for this file must still be made available in
+ accordance with section (3) of the GNU General Public License.
+
+ This exception does not invalidate any other reasons why a work
+ based on this file might be covered by the GNU General Public
+ License.
+ -------------------------------------------
+####COPYRIGHTEND####*/
+#include <stdbool.h>
+#include <stdint.h>
+#include <stddef.h>
+#include "bacdef.h"
+#include "mstp.h"
+#include "dlmstp.h"
+
+/* returns number of bytes sent on success, negative on failure */
+int dlmstp_send_pdu(
+  BACNET_ADDRESS *dest,  // destination address
+  uint8_t *pdu, // any data to be sent - may be null
+  unsigned pdu_len) // number of bytes of data
+{
+
+  (void)dest;
+  (void)pdu;
+  (void)pdu_len;
+
+  return 0;
+}
+
+// returns the number of octets in the PDU, or zero on failure
+uint16_t dlmstp_receive(
+  BACNET_ADDRESS *src,  // source address
+  uint8_t *pdu, // PDU data
+  uint16_t max_pdu,  // amount of space available in the PDU 
+  unsigned timeout) // milliseconds to wait for a packet
+{
+  (void)src;
+  (void)pdu;
+  (void)max_pdu;
+  (void)timeout;
+  
+  return 0;
+}
+
+void dlmstp_set_my_address(BACNET_ADDRESS *my_address)
+{
+  return;
+}
+
+void dlmstp_get_my_address(BACNET_ADDRESS *my_address)
+{
+  return;
+}
+
+void dlmstp_get_broadcast_address(
+  BACNET_ADDRESS *dest)  // destination address
+{
+  return;
+}
diff --git a/bacnet-stack/dlmstp.h b/bacnet-stack/dlmstp.h
new file mode 100644
index 00000000..9c3ca1ae
--- /dev/null
+++ b/bacnet-stack/dlmstp.h
@@ -0,0 +1,65 @@
+/*####COPYRIGHTBEGIN####
+ -------------------------------------------
+ Copyright (C) 2005 Steve Karg
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ as published by the Free Software Foundation; either version 2
+ of the License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to:
+ The Free Software Foundation, Inc.
+ 59 Temple Place - Suite 330
+ Boston, MA  02111-1307
+ USA.
+
+ As a special exception, if other files instantiate templates or
+ use macros or inline functions from this file, or you compile
+ this file and link it with other works to produce a work based
+ on this file, this file does not by itself cause the resulting
+ work to be covered by the GNU General Public License. However
+ the source code for this file must still be made available in
+ accordance with section (3) of the GNU General Public License.
+
+ This exception does not invalidate any other reasons why a work
+ based on this file might be covered by the GNU General Public
+ License.
+ -------------------------------------------
+####COPYRIGHTEND####*/
+#ifndef DLMSTP_H
+#define DLMSTP_H
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stddef.h>
+#include "bacdef.h"
+
+// defines specific to MS/TP
+#define MAX_HEADER (2+1+1+1+2+1+2+1)
+#define MAX_MPDU (MAX_HEADER+MAX_PDU)
+
+/* returns number of bytes sent on success, negative on failure */
+int dlmstp_send_pdu(
+  BACNET_ADDRESS *dest,  // destination address
+  uint8_t *pdu, // any data to be sent - may be null
+  unsigned pdu_len); // number of bytes of data
+
+// returns the number of octets in the PDU, or zero on failure
+uint16_t dlmstp_receive(
+  BACNET_ADDRESS *src,  // source address
+  uint8_t *pdu, // PDU data
+  uint16_t max_pdu,  // amount of space available in the PDU 
+  unsigned timeout); // milliseconds to wait for a packet
+
+void dlmstp_set_my_address(BACNET_ADDRESS *my_address);
+void dlmstp_get_my_address(BACNET_ADDRESS *my_address);
+void dlmstp_get_broadcast_address(
+  BACNET_ADDRESS *dest);  // destination address
+
+#endif