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diff --git a/include/mach/port.h b/include/mach/port.h
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	File:	mach/port.h
+ *
+ *	Definition of a port
+ *
+ *	[The basic mach_port_t type should probably be machine-dependent,
+ *	as it must be represented by a 32-bit integer.]
+ */
+
+#ifndef	_MACH_PORT_H_
+#define _MACH_PORT_H_
+
+#ifdef	MACH_KERNEL
+#include <mach_ipc_compat.h>
+#endif	/* MACH_KERNEL */
+
+#include <mach/boolean.h>
+#include <mach/machine/vm_types.h>
+
+
+typedef natural_t mach_port_t;
+typedef mach_port_t *mach_port_array_t;
+typedef int *rpc_signature_info_t;
+
+/*
+ *  MACH_PORT_NULL is a legal value that can be carried in messages.
+ *  It indicates the absence of any port or port rights.  (A port
+ *  argument keeps the message from being "simple", even if the
+ *  value is MACH_PORT_NULL.)  The value MACH_PORT_DEAD is also
+ *  a legal value that can be carried in messages.  It indicates
+ *  that a port right was present, but it died.
+ */
+
+#define MACH_PORT_NULL		((mach_port_t) 0)
+#define MACH_PORT_DEAD		((mach_port_t) ~0)
+
+#define	MACH_PORT_VALID(name)	\
+		(((name) != MACH_PORT_NULL) && ((name) != MACH_PORT_DEAD))
+
+/*
+ *  These are the different rights a task may have.
+ *  The MACH_PORT_RIGHT_* definitions are used as arguments
+ *  to mach_port_allocate, mach_port_get_refs, etc, to specify
+ *  a particular right to act upon.  The mach_port_names and
+ *  mach_port_type calls return bitmasks using the MACH_PORT_TYPE_*
+ *  definitions.  This is because a single name may denote
+ *  multiple rights.
+ */
+
+typedef natural_t mach_port_right_t;
+
+#define MACH_PORT_RIGHT_SEND		((mach_port_right_t) 0)
+#define MACH_PORT_RIGHT_RECEIVE		((mach_port_right_t) 1)
+#define MACH_PORT_RIGHT_SEND_ONCE	((mach_port_right_t) 2)
+#define MACH_PORT_RIGHT_PORT_SET	((mach_port_right_t) 3)
+#define MACH_PORT_RIGHT_DEAD_NAME	((mach_port_right_t) 4)
+#define MACH_PORT_RIGHT_NUMBER		((mach_port_right_t) 5)
+
+typedef natural_t mach_port_type_t;
+typedef mach_port_type_t *mach_port_type_array_t;
+
+#define MACH_PORT_TYPE(right)	    ((mach_port_type_t)(1 << ((right)+16)))
+#define MACH_PORT_TYPE_NONE	    ((mach_port_type_t) 0)
+#define MACH_PORT_TYPE_SEND	    MACH_PORT_TYPE(MACH_PORT_RIGHT_SEND)
+#define MACH_PORT_TYPE_RECEIVE	    MACH_PORT_TYPE(MACH_PORT_RIGHT_RECEIVE)
+#define MACH_PORT_TYPE_SEND_ONCE    MACH_PORT_TYPE(MACH_PORT_RIGHT_SEND_ONCE)
+#define MACH_PORT_TYPE_PORT_SET	    MACH_PORT_TYPE(MACH_PORT_RIGHT_PORT_SET)
+#define MACH_PORT_TYPE_DEAD_NAME    MACH_PORT_TYPE(MACH_PORT_RIGHT_DEAD_NAME)
+
+/* Convenient combinations. */
+
+#define MACH_PORT_TYPE_SEND_RECEIVE					\
+		(MACH_PORT_TYPE_SEND|MACH_PORT_TYPE_RECEIVE)
+#define	MACH_PORT_TYPE_SEND_RIGHTS					\
+		(MACH_PORT_TYPE_SEND|MACH_PORT_TYPE_SEND_ONCE)
+#define	MACH_PORT_TYPE_PORT_RIGHTS					\
+		(MACH_PORT_TYPE_SEND_RIGHTS|MACH_PORT_TYPE_RECEIVE)
+#define	MACH_PORT_TYPE_PORT_OR_DEAD					\
+		(MACH_PORT_TYPE_PORT_RIGHTS|MACH_PORT_TYPE_DEAD_NAME)
+#define MACH_PORT_TYPE_ALL_RIGHTS					\
+		(MACH_PORT_TYPE_PORT_OR_DEAD|MACH_PORT_TYPE_PORT_SET)
+
+/* Dummy type bits that mach_port_type/mach_port_names can return. */
+
+#define MACH_PORT_TYPE_DNREQUEST	0x80000000U
+#define MACH_PORT_TYPE_MAREQUEST	0x40000000
+#define	MACH_PORT_TYPE_COMPAT		0x20000000
+
+/* User-references for capabilities. */
+
+typedef natural_t mach_port_urefs_t;
+typedef integer_t mach_port_delta_t;			/* change in urefs */
+
+/* Attributes of ports.  (See mach_port_get_receive_status.) */
+
+typedef natural_t mach_port_seqno_t;		/* sequence number */
+typedef unsigned int mach_port_mscount_t;	/* make-send count */
+typedef unsigned int mach_port_msgcount_t;	/* number of msgs */
+typedef unsigned int mach_port_rights_t;	/* number of rights */
+
+typedef struct mach_port_status {
+	mach_port_t		mps_pset;	/* containing port set */
+	mach_port_seqno_t	mps_seqno;	/* sequence number */
+/*mach_port_mscount_t*/natural_t mps_mscount;	/* make-send count */
+/*mach_port_msgcount_t*/natural_t mps_qlimit;	/* queue limit */
+/*mach_port_msgcount_t*/natural_t mps_msgcount;	/* number in the queue */
+/*mach_port_rights_t*/natural_t	mps_sorights;	/* how many send-once rights */
+/*boolean_t*/natural_t		mps_srights;	/* do send rights exist? */
+/*boolean_t*/natural_t		mps_pdrequest;	/* port-deleted requested? */
+/*boolean_t*/natural_t		mps_nsrequest;	/* no-senders requested? */
+} mach_port_status_t;
+
+#define MACH_PORT_QLIMIT_DEFAULT	((mach_port_msgcount_t) 5)
+#define MACH_PORT_QLIMIT_MAX		((mach_port_msgcount_t) 16)
+
+/*
+ *  Compatibility definitions, for code written
+ *  before there was an mps_seqno field.
+ */
+
+typedef struct old_mach_port_status {
+	mach_port_t		mps_pset;	/* containing port set */
+/*mach_port_mscount_t*/natural_t mps_mscount;	/* make-send count */
+/*mach_port_msgcount_t*/natural_t mps_qlimit;	/* queue limit */
+/*mach_port_msgcount_t*/natural_t mps_msgcount;	/* number in the queue */
+/*mach_port_rights_t*/natural_t	mps_sorights;	/* how many send-once rights */
+/*boolean_t*/natural_t		mps_srights;	/* do send rights exist? */
+/*boolean_t*/natural_t		mps_pdrequest;	/* port-deleted requested? */
+/*boolean_t*/natural_t		mps_nsrequest;	/* no-senders requested? */
+} old_mach_port_status_t;
+
+
+/* Definitions for the old IPC interface. */
+
+#if	MACH_IPC_COMPAT
+
+typedef integer_t	port_name_t;		/* A capability's name */
+typedef port_name_t	port_set_name_t;	/* Descriptive alias */
+typedef port_name_t	*port_name_array_t;
+
+typedef integer_t	port_type_t;		/* What kind of capability? */
+typedef port_type_t	*port_type_array_t;
+
+	/* Values for port_type_t */
+
+#define PORT_TYPE_NONE		0		/* No rights */
+#define PORT_TYPE_SEND		1		/* Send rights */
+#define PORT_TYPE_RECEIVE	3		/* obsolete */
+#define PORT_TYPE_OWN		5		/* obsolete */
+#define PORT_TYPE_RECEIVE_OWN	7		/* Send, receive, ownership */
+#define PORT_TYPE_SET		9		/* Set ownership */
+#define PORT_TYPE_LAST		10		/* Last assigned */
+
+typedef	port_name_t	port_t;			/* Port with send rights */
+typedef	port_t		port_rcv_t;		/* Port with receive rights */
+typedef	port_t		port_own_t;		/* Port with ownership rights */
+typedef	port_t		port_all_t;		/* Port with receive and ownership */
+typedef	port_t		*port_array_t;
+
+#define PORT_NULL	((port_name_t) 0)	/* Used to denote no port; legal value */
+
+#endif	/* MACH_IPC_COMPAT */
+
+#endif	/* _MACH_PORT_H_ */