diff --git a/dbus.h b/dbus.h
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+++ b/dbus.h
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+/*
+ * Copyright 2016 IBM
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef MBOX_DBUS_H
+#define MBOX_DBUS_H
+
+#define DBUS_NAME		"org.openbmc.mboxd"
+#define DOBJ_NAME		"/org/openbmc/mboxd"
+
+/* Commands */
+#define DBUS_C_PING		0x00
+#define	DBUS_C_DAEMON_STATE	0x01
+#define DBUS_C_RESET		0x02
+#define DBUS_C_SUSPEND		0x03
+#define DBUS_C_RESUME		0x04
+#define DBUS_C_MODIFIED		0x05
+#define DBUS_C_KILL		0x06
+#define DBUS_C_LPC_STATE	0x07
+#define NUM_DBUS_CMDS		(DBUS_C_LPC_STATE + 1)
+
+/* Command Args */
+/* Resume */
+#define RESUME_NUM_ARGS		1
+#define RESUME_NOT_MODIFIED	0x00
+#define RESUME_FLASH_MODIFIED	0x01
+
+/* Return Values */
+#define DBUS_SUCCESS		0x00 /* Command Succeded */
+#define E_DBUS_INTERNAL		0x01 /* Internal DBUS Error */
+#define E_DBUS_INVAL		0x02 /* Invalid Command */
+#define E_DBUS_REJECTED		0x03 /* Daemon Rejected Request */
+#define E_DBUS_HARDWARE		0x04 /* BMC Hardware Error */
+
+/* Response Args */
+/* Status */
+#define DAEMON_STATE_NUM_ARGS	1
+#define DAEMON_STATE_ACTIVE	0x00 /* Daemon Active */
+#define DAEMON_STATE_SUSPENDED	0x01 /* Daemon Suspended */
+/* LPC State */
+#define LPC_STATE_NUM_ARGS	1
+#define LPC_STATE_INVALID	0x00 /* Invalid State */
+#define LPC_STATE_FLASH		0x01 /* LPC Maps Flash Directly */
+#define LPC_STATE_MEM		0x02 /* LPC Maps Memory */
+
+struct mbox_dbus_msg {
+	uint8_t cmd;
+	size_t num_args;
+	uint8_t *args;
+};
+
+#endif /* MBOX_DBUS_H */