xnu-2782.40.9.tar.gz

[apple/xnu.git] / osfmk / mach / port.h

diff --git a/osfmk/mach/port.h b/osfmk/mach/port.h
index 42c182000b04b48f107d8cf0a3b3378444551a10..55735bc8a7a13958172df54c9d2117bff556a880 100644 (file)
--- a/osfmk/mach/port.h
+++ b/osfmk/mach/port.h
@@ -1,23 +1,29 @@
 /*
 /*

- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  * 
  * 

- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.

  * 
  * 

- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER

  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.

  * 
  * 

- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 /*
  * @OSF_COPYRIGHT@
  */
 /*
  * @OSF_COPYRIGHT@


@@ -47,77 +53,141 @@
  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */
  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */

+/*
+ * NOTICE: This file was modified by McAfee Research in 2004 to introduce
+ * support for mandatory and extensible security protections.  This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */

 /*
  */
 /*
  *     File:   mach/port.h
  *
 /*
  */
 /*
  *     File:   mach/port.h
  *

- *     Definition of a port
+ *     Definition of a Mach port
+ *
+ *     Mach ports are the endpoints to Mach-implemented communications
+ *     channels (usually uni-directional message queues, but other types
+ *     also exist).
+ *
+ *     Unique collections of these endpoints are maintained for each
+ *     Mach task.  Each Mach port in the task's collection is given a 
+ *     [task-local] name to identify it - and the the various "rights"
+ *     held by the task for that specific endpoint.
+ *
+ *     This header defines the types used to identify these Mach ports
+ *     and the various rights associated with them.  For more info see:
+ *
+ *     <mach/mach_port.h> - manipulation of port rights in a given space
+ *     <mach/message.h> - message queue [and port right passing] mechanism

  *
  *

- *     [The basic 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_
 
  */
 
 #ifndef        _MACH_PORT_H_
 #define _MACH_PORT_H_
 

+#include <sys/cdefs.h>
+#include <stdint.h>

 #include <mach/boolean.h>
 #include <mach/machine/vm_types.h>
 
 /*
 #include <mach/boolean.h>
 #include <mach/machine/vm_types.h>
 
 /*

- * A port_name_t is a 32 bit value which represents a name of a
- * port right within some ipc space.  This is a constant definition
- * everywhere.
+ *     mach_port_name_t - the local identity for a Mach port

  *
  *

- * The type port_t represents a reference added or deleted to a
- * port right.
+ *     The name is Mach port namespace specific.  It is used to
+ *     identify the rights held for that port by the task whose
+ *     namespace is implied [or specifically provided].

  *
  *

- *     At user space, this is represented by returning the name of
- *     the right(s) that got altered within the user's ipc space.
- *     So a port_t is the same type as a port_name_t there.
+ *     Use of this type usually implies just a name - no rights.
+ *     See mach_port_t for a type that implies a "named right."

  *
  *

- *     Since there is no right space for the kernel proper (all rights
- *     are naked rights) these rights are represented by passing a
- *     pointer to the specific ipc_object_t subclass (typically
- *     ipc_port_t) that got altered/is to be altered.

  */
  */

-typedef natural_t port_name_t;
-typedef port_name_t *port_name_array_t;
+ 
+typedef natural_t mach_port_name_t;
+typedef mach_port_name_t *mach_port_name_array_t;

 
 

-#ifdef KERNEL_PRIVATE
+#ifdef KERNEL
+
+/* 
+ *     mach_port_t - a named port right
+ *
+ *     In the kernel, "rights" are represented [named] by pointers to
+ *     the ipc port object in question. There is no port namespace for the
+ *     rights to be collected.
+ *
+ *     Actually, there is namespace for the kernel task.  But most kernel
+ *     code - including, but not limited to, Mach IPC code - lives in the
+ *     limbo between the current user-level task and the "next" task. Very
+ *     little of the kernel code runs in full kernel task context.  So very
+ *     little of it gets to use the kernel task's port name space.  
+ *
+ *     Because of this implementation approach, all in-kernel rights for
+ *     a given port coalesce [have the same name/pointer].  The actual
+ *     references are counted in the port itself.  It is up to the kernel
+ *     code in question to "just remember" how many [and what type of]
+ *     rights it holds and handle them appropriately.
+ *
+ */
+
+#ifndef        MACH_KERNEL_PRIVATE
+/*
+ *     For kernel code that resides outside of Mach proper, we opaque the
+ *     port structure definition.
+ */
+struct ipc_port ;

 
 

-#include <ipc/ipc_types.h>
-typedef ipc_port_t port_t;
+#endif /* MACH_KERNEL_PRIVATE */

 
 

-#else  /* ! KERNEL_PRIVATE */
+typedef struct ipc_port                *ipc_port_t;

 
 

-typedef port_name_t port_t;
+#define IPC_PORT_NULL          ((ipc_port_t) 0UL)
+#define IPC_PORT_DEAD          ((ipc_port_t)~0UL)
+#define IPC_PORT_VALID(port) \
+       ((port) != IPC_PORT_NULL && (port) != IPC_PORT_DEAD)

 
 

-#endif /* KERNEL_PRIVATE */
+typedef ipc_port_t             mach_port_t;

 
 /*
 
 /*

- *  PORT_NULL is a legal value that can be carried in messages.
+ * Since the 32-bit and 64-bit representations of ~0 are different,
+ * explicitly handle MACH_PORT_DEAD
+ */
+
+#define CAST_MACH_PORT_TO_NAME(x) ((mach_port_name_t)(uintptr_t)(x))
+#define CAST_MACH_NAME_TO_PORT(x) ((x) == MACH_PORT_DEAD ? (mach_port_t)IPC_PORT_DEAD : (mach_port_t)(uintptr_t)(x))
+
+#else  /* KERNEL */
+
+/* 
+ *     mach_port_t - a named port right
+ *
+ *     In user-space, "rights" are represented by the name of the
+ *     right in the Mach port namespace.  Even so, this type is
+ *     presented as a unique one to more clearly denote the presence
+ *     of a right coming along with the name. 
+ *
+ *     Often, various rights for a port held in a single name space
+ *     will coalesce and are, therefore, be identified by a single name
+ *     [this is the case for send and receive rights].  But not
+ *     always [send-once rights currently get a unique name for
+ *     each right].      
+ *
+ */
+
+#include <sys/_types.h>
+#include <sys/_types/_mach_port_t.h>
+
+#endif /* KERNEL */
+
+typedef mach_port_t                    *mach_port_array_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
  *  It indicates the absence of any port or port rights.  (A port
  *  argument keeps the message from being "simple", even if the

- *  value is PORT_NULL.)  The value PORT_DEAD is also a legal
+ *  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.
  */
  *  value that can be carried in messages.  It indicates
  *  that a port right was present, but it died.
  */

-#define PORT_NULL              ((port_t) 0)
-#define PORT_DEAD              ((port_t) ~0)
-#define        PORT_VALID(name)                                \
-               (((port_t)(name) != PORT_NULL) &&       \
-                 ((port_t)(name) != PORT_DEAD))
-
-/*
- *  Mach 3.0 renamed everything to have mach_ in front of it.
- *  Do that mapping here, so we have the types and macros in
- *  both formats.
- */
-typedef port_t                 mach_port_t;
-typedef port_t                 *mach_port_array_t;
-typedef port_name_t            mach_port_name_t;
-typedef mach_port_name_t       *mach_port_name_array_t;

 
 #define MACH_PORT_NULL         0  /* intentional loose typing */
 #define MACH_PORT_DEAD         ((mach_port_name_t) ~0)
 
 #define MACH_PORT_NULL         0  /* intentional loose typing */
 #define MACH_PORT_DEAD         ((mach_port_name_t) ~0)


@@ -125,35 +195,39 @@ typedef mach_port_name_t  *mach_port_name_array_t;
                (((name) != MACH_PORT_NULL) &&          \
                 ((name) != MACH_PORT_DEAD))
 
                (((name) != MACH_PORT_NULL) &&          \
                 ((name) != MACH_PORT_DEAD))
 

+

 /*
 /*

- *  mach_port_name_t must be an unsigned type.  Port values
- *  have two parts, a generation number and an index.
- *  These macros encapsulate all knowledge of how
- *  a mach_port_name_t is laid out.  They are made visible 
- *  to user tasks so that packages to map from a mach_port_name_t
- *  to associated user data can discount the generation
- *  nuber (if desired) in doing the mapping.
+ *     For kernel-selected [assigned] port names, the name is
+ *     comprised of two parts: a generation number and an index.
+ *     This approach keeps the exact same name from being generated
+ *     and reused too quickly [to catch right/reference counting bugs].
+ *     The dividing line between the constituent parts is exposed so
+ *     that efficient "mach_port_name_t to data structure pointer"
+ *     conversion implementation can be made.  But it is possible
+ *     for user-level code to assign their own names to Mach ports.
+ *     These are not required to participate in this algorithm.  So
+ *     care should be taken before "assuming" this model.

  *
  *

- *  Within the kernel, ipc/ipc_entry.c implicitly assumes
- *  when it uses the splay tree functions that the generation
- *  number is in the low bits, so that names are ordered first
- *  by index and then by generation.  If the size of generation
- *  numbers changes, be sure to update IE_BITS_GEN_MASK and
- *  friends in ipc/ipc_entry.h.

  */
  */

-#ifndef NO_PORT_GEN
+
+#ifndef        NO_PORT_GEN
+

 #define        MACH_PORT_INDEX(name)           ((name) >> 8)
 #define        MACH_PORT_GEN(name)             (((name) & 0xff) << 24)
 #define        MACH_PORT_MAKE(index, gen)      \
                (((index) << 8) | (gen) >> 24)
 #define        MACH_PORT_INDEX(name)           ((name) >> 8)
 #define        MACH_PORT_GEN(name)             (((name) & 0xff) << 24)
 #define        MACH_PORT_MAKE(index, gen)      \
                (((index) << 8) | (gen) >> 24)

-#else
+
+#else  /* NO_PORT_GEN */
+

 #define        MACH_PORT_INDEX(name)           (name)
 #define        MACH_PORT_GEN(name)             (0)
 #define        MACH_PORT_MAKE(index, gen)      (index)
 #define        MACH_PORT_INDEX(name)           (name)
 #define        MACH_PORT_GEN(name)             (0)
 #define        MACH_PORT_MAKE(index, gen)      (index)

-#endif /* !NO_PORT_GEN */
+
+#endif /* NO_PORT_GEN */
+

 
 /*
 
 /*

- *  These are the different rights a task may have.
+ *  These are the different rights a task may have for a port.

  *  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
  *  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


@@ -169,7 +243,8 @@ typedef natural_t mach_port_right_t;
 #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_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)
+#define MACH_PORT_RIGHT_LABELH         ((mach_port_right_t) 5)
+#define MACH_PORT_RIGHT_NUMBER         ((mach_port_right_t) 6)

 
 typedef natural_t mach_port_type_t;
 typedef mach_port_type_t *mach_port_type_array_t;
 
 typedef natural_t mach_port_type_t;
 typedef mach_port_type_t *mach_port_type_array_t;


@@ -183,6 +258,7 @@ typedef mach_port_type_t *mach_port_type_array_t;
 #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)
 #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)

+#define MACH_PORT_TYPE_LABELH       MACH_PORT_TYPE(MACH_PORT_RIGHT_LABELH)

 
 /* Convenient combinations. */
 
 
 /* Convenient combinations. */
 


@@ -199,7 +275,9 @@ typedef mach_port_type_t *mach_port_type_array_t;
 
 /* Dummy type bits that mach_port_type/mach_port_names can return. */
 
 
 /* Dummy type bits that mach_port_type/mach_port_names can return. */
 

-#define MACH_PORT_TYPE_DNREQUEST       0x80000000
+#define MACH_PORT_TYPE_DNREQUEST               0x80000000
+#define MACH_PORT_TYPE_SPREQUEST               0x40000000
+#define MACH_PORT_TYPE_SPREQUEST_DELAYED       0x20000000

 
 /* User-references for capabilities. */
 
 
 /* User-references for capabilities. */
 


@@ -214,20 +292,14 @@ typedef natural_t mach_port_msgcount_t;           /* number of msgs */
 typedef natural_t mach_port_rights_t;          /* number of rights */
 
 /*
 typedef natural_t mach_port_rights_t;          /* number of rights */
 
 /*

- *     A port may have NMS detection enabled, in which case
- *     it tracks outstanding send rights.  Otherwise, there
- *     is no information available about outstanding srights.
- *     The return values are deliberately chosen to match
- *     the old boolean (0=FALSE=no srights, 1=TRUE=srights,
- *     2=xxx=no information available).
+ *     Are there outstanding send rights for a given port?

  */
  */

-#define        MACH_PORT_SRIGHTS_NONE          0               /* NMS:  no srights */
-#define        MACH_PORT_SRIGHTS_PRESENT       1               /* NMS:  srights */
-#define        MACH_PORT_SRIGHTS_NO_INFO       2               /* no NMS */
+#define        MACH_PORT_SRIGHTS_NONE          0               /* no srights */
+#define        MACH_PORT_SRIGHTS_PRESENT       1               /* srights */

 typedef unsigned int mach_port_srights_t;      /* status of send rights */
 
 typedef struct mach_port_status {
 typedef unsigned int mach_port_srights_t;      /* status of send rights */
 
 typedef struct mach_port_status {

-       mach_port_name_t        mps_pset;       /* containing port set */
+       mach_port_rights_t      mps_pset;       /* count of containing port sets */

        mach_port_seqno_t       mps_seqno;      /* sequence number */
        mach_port_mscount_t     mps_mscount;    /* make-send count */
        mach_port_msgcount_t    mps_qlimit;     /* queue limit */
        mach_port_seqno_t       mps_seqno;      /* sequence number */
        mach_port_mscount_t     mps_mscount;    /* make-send count */
        mach_port_msgcount_t    mps_qlimit;     /* queue limit */


@@ -236,16 +308,37 @@ typedef struct mach_port_status {
        boolean_t               mps_srights;    /* do send rights exist? */
        boolean_t               mps_pdrequest;  /* port-deleted requested? */
        boolean_t               mps_nsrequest;  /* no-senders requested? */
        boolean_t               mps_srights;    /* do send rights exist? */
        boolean_t               mps_pdrequest;  /* port-deleted requested? */
        boolean_t               mps_nsrequest;  /* no-senders requested? */

-       unsigned int            mps_flags;      /* port flags */
+       natural_t               mps_flags;              /* port flags */

 } mach_port_status_t;
 
 } mach_port_status_t;
 

-#define MACH_PORT_QLIMIT_DEFAULT       ((mach_port_msgcount_t) 5)
-#define MACH_PORT_QLIMIT_MAX           ((mach_port_msgcount_t) 16)
+/* System-wide values for setting queue limits on a port */
+#define MACH_PORT_QLIMIT_ZERO          ((mach_port_msgcount_t) 0)
+#define MACH_PORT_QLIMIT_BASIC         ((mach_port_msgcount_t) 5)
+#define MACH_PORT_QLIMIT_SMALL         ((mach_port_msgcount_t) 16)
+#define MACH_PORT_QLIMIT_LARGE         ((mach_port_msgcount_t) 1024)
+#define MACH_PORT_QLIMIT_KERNEL                ((mach_port_msgcount_t) 65536)
+#define MACH_PORT_QLIMIT_MIN           MACH_PORT_QLIMIT_ZERO
+#define MACH_PORT_QLIMIT_DEFAULT       MACH_PORT_QLIMIT_BASIC
+#define MACH_PORT_QLIMIT_MAX           MACH_PORT_QLIMIT_LARGE

 
 typedef struct mach_port_limits {
        mach_port_msgcount_t    mpl_qlimit;     /* number of msgs */
 } mach_port_limits_t;
 
 
 typedef struct mach_port_limits {
        mach_port_msgcount_t    mpl_qlimit;     /* number of msgs */
 } mach_port_limits_t;
 

+/* Possible values for mps_flags (part of mach_port_status_t) */
+#define MACH_PORT_STATUS_FLAG_TEMPOWNER                0x01
+#define MACH_PORT_STATUS_FLAG_GUARDED          0x02
+#define MACH_PORT_STATUS_FLAG_STRICT_GUARD     0x04
+#define MACH_PORT_STATUS_FLAG_IMP_DONATION     0x08
+#define MACH_PORT_STATUS_FLAG_REVIVE           0x10
+#define MACH_PORT_STATUS_FLAG_TASKPTR          0x20
+
+typedef struct mach_port_info_ext {
+       mach_port_status_t      mpie_status;
+       mach_port_msgcount_t    mpie_boost_cnt;
+       uint32_t                reserved[6];
+} mach_port_info_ext_t;
+

 typedef integer_t *mach_port_info_t;           /* varying array of natural_t */
 
 /* Flavors for mach_port_get/set_attributes() */
 typedef integer_t *mach_port_info_t;           /* varying array of natural_t */
 
 /* Flavors for mach_port_get/set_attributes() */


@@ -253,23 +346,87 @@ typedef int       mach_port_flavor_t;
 #define MACH_PORT_LIMITS_INFO          1       /* uses mach_port_status_t */
 #define MACH_PORT_RECEIVE_STATUS       2       /* uses mach_port_limits_t */
 #define MACH_PORT_DNREQUESTS_SIZE      3       /* info is int */
 #define MACH_PORT_LIMITS_INFO          1       /* uses mach_port_status_t */
 #define MACH_PORT_RECEIVE_STATUS       2       /* uses mach_port_limits_t */
 #define MACH_PORT_DNREQUESTS_SIZE      3       /* info is int */

-
-#define MACH_PORT_LIMITS_INFO_COUNT \
-       (sizeof(mach_port_limits_t)/sizeof(natural_t))
-#define MACH_PORT_RECEIVE_STATUS_COUNT \
-       (sizeof(mach_port_status_t)/sizeof(natural_t))
+#define MACH_PORT_TEMPOWNER            4       /* indicates receive right will be reassigned to another task */
+#define MACH_PORT_IMPORTANCE_RECEIVER  5       /* indicates recieve right accepts priority donation */
+#define MACH_PORT_DENAP_RECEIVER       6       /* indicates receive right accepts de-nap donation */
+#define MACH_PORT_INFO_EXT             7       /* uses mach_port_info_ext_t */
+
+#define MACH_PORT_LIMITS_INFO_COUNT    ((natural_t) \
+       (sizeof(mach_port_limits_t)/sizeof(natural_t)))
+#define MACH_PORT_RECEIVE_STATUS_COUNT ((natural_t) \
+       (sizeof(mach_port_status_t)/sizeof(natural_t)))

 #define MACH_PORT_DNREQUESTS_SIZE_COUNT 1
 #define MACH_PORT_DNREQUESTS_SIZE_COUNT 1

-
+#define MACH_PORT_INFO_EXT_COUNT       ((natural_t) \
+       (sizeof(mach_port_info_ext_t)/sizeof(natural_t)))

 /*
  * Structure used to pass information about port allocation requests.
  * Must be padded to 64-bits total length.
  */
 /*
  * Structure used to pass information about port allocation requests.
  * Must be padded to 64-bits total length.
  */

-

 typedef struct mach_port_qos {
 typedef struct mach_port_qos {

-       boolean_t               name:1;         /* name given */
-       boolean_t               prealloc:1;     /* prealloced message */
+       unsigned int            name:1;         /* name given */
+       unsigned int            prealloc:1;     /* prealloced message */

        boolean_t               pad1:30;
        natural_t               len;
 } mach_port_qos_t;
 
        boolean_t               pad1:30;
        natural_t               len;
 } mach_port_qos_t;
 

+/* Mach Port Guarding definitions */
+
+/*
+ * Flags for mach_port_options (used for
+ * invocation of mach_port_construct).
+ * Indicates attributes to be set for the newly
+ * allocated port.
+ */
+#define MPO_CONTEXT_AS_GUARD   0x01    /* Add guard to the port */
+#define MPO_QLIMIT             0x02    /* Set qlimit for the port msg queue */
+#define MPO_TEMPOWNER          0x04    /* Set the tempowner bit of the port */
+#define MPO_IMPORTANCE_RECEIVER 0x08   /* Mark the port as importance receiver */
+#define MPO_INSERT_SEND_RIGHT   0x10   /* Insert a send right for the port */
+#define MPO_STRICT             0x20    /* Apply strict guarding for port */
+#define MPO_DENAP_RECEIVER     0x40    /* Mark the port as App de-nap receiver */
+/*
+ * Structure to define optional attributes for a newly
+ * constructed port.
+ */
+typedef struct mach_port_options {
+       uint32_t                flags;          /* Flags defining attributes for port */
+       mach_port_limits_t      mpl;            /* Message queue limit for port */
+       uint64_t                reserved[2];    /* Reserved */
+}mach_port_options_t;
+
+typedef mach_port_options_t *mach_port_options_ptr_t;
+
+/*
+ * EXC_GUARD represents a guard violation for both
+ * mach ports and file descriptors. GUARD_TYPE_ is used
+ * to differentiate among them.
+ */
+#define GUARD_TYPE_MACH_PORT   0x1
+
+/* Reasons for exception for a guarded mach port */
+enum mach_port_guard_exception_codes {
+       kGUARD_EXC_DESTROY              = 1u << 0,
+       kGUARD_EXC_MOD_REFS             = 1u << 1,
+       kGUARD_EXC_SET_CONTEXT          = 1u << 2,
+       kGUARD_EXC_UNGUARDED            = 1u << 3,
+       kGUARD_EXC_INCORRECT_GUARD      = 1u << 4
+};
+
+#if    !__DARWIN_UNIX03 && !defined(_NO_PORT_T_FROM_MACH)
+/*
+ *  Mach 3.0 renamed everything to have mach_ in front of it.
+ *  These types and macros are provided for backward compatibility
+ *     but are deprecated.
+ */
+typedef mach_port_t            port_t;
+typedef mach_port_name_t       port_name_t;
+typedef mach_port_name_t       *port_name_array_t;
+
+#define PORT_NULL              ((port_t) 0)
+#define PORT_DEAD              ((port_t) ~0)
+#define PORT_VALID(name) \
+               ((port_t)(name) != PORT_NULL && (port_t)(name) != PORT_DEAD)
+
+#endif /* !__DARWIN_UNIX03 && !_NO_PORT_T_FROM_MACH */
+

 #endif /* _MACH_PORT_H_ */
 #endif /* _MACH_PORT_H_ */