489 lines
20 KiB
C
489 lines
20 KiB
C
/*
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* Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* @OSF_COPYRIGHT@
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*/
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/*
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* Mach Operating System
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* Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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/*
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* NOTICE: This file was modified by McAfee Research in 2004 to introduce
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* support for mandatory and extensible security protections. This notice
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* is included in support of clause 2.2 (b) of the Apple Public License,
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* Version 2.0.
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*/
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/*
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*/
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/*
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* File: mach/port.h
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*
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* Definition of a Mach port
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*
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* Mach ports are the endpoints to Mach-implemented communications
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* channels (usually uni-directional message queues, but other types
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* also exist).
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*
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* Unique collections of these endpoints are maintained for each
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* Mach task. Each Mach port in the task's collection is given a
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* [task-local] name to identify it - and the the various "rights"
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* held by the task for that specific endpoint.
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*
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* This header defines the types used to identify these Mach ports
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* and the various rights associated with them. For more info see:
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*
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* <mach/mach_port.h> - manipulation of port rights in a given space
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* <mach/message.h> - message queue [and port right passing] mechanism
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*
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*/
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#ifndef _MACH_PORT_H_
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#define _MACH_PORT_H_
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#include <sys/cdefs.h>
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#include <stdint.h>
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#include <mach/boolean.h>
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#include <mach/machine/vm_types.h>
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/*
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* mach_port_name_t - the local identity for a Mach port
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*
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* The name is Mach port namespace specific. It is used to
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* identify the rights held for that port by the task whose
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* namespace is implied [or specifically provided].
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*
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* Use of this type usually implies just a name - no rights.
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* See mach_port_t for a type that implies a "named right."
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*
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*/
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typedef natural_t mach_port_name_t;
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typedef mach_port_name_t *mach_port_name_array_t;
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/*
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* mach_port_t - a named port right
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*
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* In user-space, "rights" are represented by the name of the
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* right in the Mach port namespace. Even so, this type is
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* presented as a unique one to more clearly denote the presence
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* of a right coming along with the name.
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*
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* Often, various rights for a port held in a single name space
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* will coalesce and are, therefore, be identified by a single name
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* [this is the case for send and receive rights]. But not
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* always [send-once rights currently get a unique name for
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* each right].
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*
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*/
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#include <sys/_types.h>
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#include <sys/_types/_mach_port_t.h>
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typedef mach_port_t *mach_port_array_t;
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/*
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* MACH_PORT_NULL is a legal value that can be carried in messages.
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* It indicates the absence of any port or port rights. (A port
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* argument keeps the message from being "simple", even if the
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* value is MACH_PORT_NULL.) The value MACH_PORT_DEAD is also a legal
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* value that can be carried in messages. It indicates
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* that a port right was present, but it died.
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*/
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#define MACH_PORT_NULL 0 /* intentional loose typing */
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#define MACH_PORT_DEAD ((mach_port_name_t) ~0)
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#define MACH_PORT_VALID(name) \
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(((name) != MACH_PORT_NULL) && \
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((name) != MACH_PORT_DEAD))
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/*
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* For kernel-selected [assigned] port names, the name is
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* comprised of two parts: a generation number and an index.
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* This approach keeps the exact same name from being generated
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* and reused too quickly [to catch right/reference counting bugs].
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* The dividing line between the constituent parts is exposed so
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* that efficient "mach_port_name_t to data structure pointer"
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* conversion implementation can be made. But it is possible
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* for user-level code to assign their own names to Mach ports.
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* These are not required to participate in this algorithm. So
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* care should be taken before "assuming" this model.
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*
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*/
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#ifndef NO_PORT_GEN
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#define MACH_PORT_INDEX(name) ((name) >> 8)
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#define MACH_PORT_GEN(name) (((name) & 0xff) << 24)
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#define MACH_PORT_MAKE(index, gen) \
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(((index) << 8) | (gen) >> 24)
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#else /* NO_PORT_GEN */
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#define MACH_PORT_INDEX(name) (name)
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#define MACH_PORT_GEN(name) (0)
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#define MACH_PORT_MAKE(index, gen) (index)
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#endif /* NO_PORT_GEN */
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/*
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* These are the different rights a task may have for a port.
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* The MACH_PORT_RIGHT_* definitions are used as arguments
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* to mach_port_allocate, mach_port_get_refs, etc, to specify
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* a particular right to act upon. The mach_port_names and
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* mach_port_type calls return bitmasks using the MACH_PORT_TYPE_*
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* definitions. This is because a single name may denote
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* multiple rights.
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*/
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typedef natural_t mach_port_right_t;
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#define MACH_PORT_RIGHT_SEND ((mach_port_right_t) 0)
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#define MACH_PORT_RIGHT_RECEIVE ((mach_port_right_t) 1)
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#define MACH_PORT_RIGHT_SEND_ONCE ((mach_port_right_t) 2)
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#define MACH_PORT_RIGHT_PORT_SET ((mach_port_right_t) 3)
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#define MACH_PORT_RIGHT_DEAD_NAME ((mach_port_right_t) 4)
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#define MACH_PORT_RIGHT_LABELH ((mach_port_right_t) 5) /* obsolete right */
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#define MACH_PORT_RIGHT_NUMBER ((mach_port_right_t) 6) /* right not implemented */
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typedef natural_t mach_port_type_t;
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typedef mach_port_type_t *mach_port_type_array_t;
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#define MACH_PORT_TYPE(right) \
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((mach_port_type_t)(((mach_port_type_t) 1) \
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<< ((right) + ((mach_port_right_t) 16))))
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#define MACH_PORT_TYPE_NONE ((mach_port_type_t) 0L)
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#define MACH_PORT_TYPE_SEND MACH_PORT_TYPE(MACH_PORT_RIGHT_SEND)
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#define MACH_PORT_TYPE_RECEIVE MACH_PORT_TYPE(MACH_PORT_RIGHT_RECEIVE)
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#define MACH_PORT_TYPE_SEND_ONCE MACH_PORT_TYPE(MACH_PORT_RIGHT_SEND_ONCE)
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#define MACH_PORT_TYPE_PORT_SET MACH_PORT_TYPE(MACH_PORT_RIGHT_PORT_SET)
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#define MACH_PORT_TYPE_DEAD_NAME MACH_PORT_TYPE(MACH_PORT_RIGHT_DEAD_NAME)
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#define MACH_PORT_TYPE_LABELH MACH_PORT_TYPE(MACH_PORT_RIGHT_LABELH) /* obsolete */
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/* Convenient combinations. */
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#define MACH_PORT_TYPE_SEND_RECEIVE \
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(MACH_PORT_TYPE_SEND|MACH_PORT_TYPE_RECEIVE)
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#define MACH_PORT_TYPE_SEND_RIGHTS \
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(MACH_PORT_TYPE_SEND|MACH_PORT_TYPE_SEND_ONCE)
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#define MACH_PORT_TYPE_PORT_RIGHTS \
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(MACH_PORT_TYPE_SEND_RIGHTS|MACH_PORT_TYPE_RECEIVE)
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#define MACH_PORT_TYPE_PORT_OR_DEAD \
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(MACH_PORT_TYPE_PORT_RIGHTS|MACH_PORT_TYPE_DEAD_NAME)
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#define MACH_PORT_TYPE_ALL_RIGHTS \
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(MACH_PORT_TYPE_PORT_OR_DEAD|MACH_PORT_TYPE_PORT_SET)
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/* Dummy type bits that mach_port_type/mach_port_names can return. */
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#define MACH_PORT_TYPE_DNREQUEST 0x80000000
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#define MACH_PORT_TYPE_SPREQUEST 0x40000000
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#define MACH_PORT_TYPE_SPREQUEST_DELAYED 0x20000000
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/* User-references for capabilities. */
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typedef natural_t mach_port_urefs_t;
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typedef integer_t mach_port_delta_t; /* change in urefs */
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/* Attributes of ports. (See mach_port_get_receive_status.) */
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typedef natural_t mach_port_seqno_t; /* sequence number */
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typedef natural_t mach_port_mscount_t; /* make-send count */
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typedef natural_t mach_port_msgcount_t; /* number of msgs */
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typedef natural_t mach_port_rights_t; /* number of rights */
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/*
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* Are there outstanding send rights for a given port?
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*/
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#define MACH_PORT_SRIGHTS_NONE 0 /* no srights */
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#define MACH_PORT_SRIGHTS_PRESENT 1 /* srights */
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typedef unsigned int mach_port_srights_t; /* status of send rights */
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typedef struct mach_port_status {
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mach_port_rights_t mps_pset; /* count of containing port sets */
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mach_port_seqno_t mps_seqno; /* sequence number */
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mach_port_mscount_t mps_mscount; /* make-send count */
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mach_port_msgcount_t mps_qlimit; /* queue limit */
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mach_port_msgcount_t mps_msgcount; /* number in the queue */
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mach_port_rights_t mps_sorights; /* how many send-once rights */
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boolean_t mps_srights; /* do send rights exist? */
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boolean_t mps_pdrequest; /* port-deleted requested? */
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boolean_t mps_nsrequest; /* no-senders requested? */
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natural_t mps_flags; /* port flags */
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} mach_port_status_t;
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/* System-wide values for setting queue limits on a port */
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#define MACH_PORT_QLIMIT_ZERO (0)
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#define MACH_PORT_QLIMIT_BASIC (5)
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#define MACH_PORT_QLIMIT_SMALL (16)
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#define MACH_PORT_QLIMIT_LARGE (1024)
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#define MACH_PORT_QLIMIT_KERNEL (65534)
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#define MACH_PORT_QLIMIT_MIN MACH_PORT_QLIMIT_ZERO
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#define MACH_PORT_QLIMIT_DEFAULT MACH_PORT_QLIMIT_BASIC
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#define MACH_PORT_QLIMIT_MAX MACH_PORT_QLIMIT_LARGE
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typedef struct mach_port_limits {
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mach_port_msgcount_t mpl_qlimit; /* number of msgs */
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} mach_port_limits_t;
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/* Possible values for mps_flags (part of mach_port_status_t) */
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#define MACH_PORT_STATUS_FLAG_TEMPOWNER 0x01
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#define MACH_PORT_STATUS_FLAG_GUARDED 0x02
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#define MACH_PORT_STATUS_FLAG_STRICT_GUARD 0x04
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#define MACH_PORT_STATUS_FLAG_IMP_DONATION 0x08
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#define MACH_PORT_STATUS_FLAG_REVIVE 0x10
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#define MACH_PORT_STATUS_FLAG_TASKPTR 0x20
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#define MACH_PORT_STATUS_FLAG_GUARD_IMMOVABLE_RECEIVE 0x40
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#define MACH_PORT_STATUS_FLAG_NO_GRANT 0x80
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typedef struct mach_port_info_ext {
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mach_port_status_t mpie_status;
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mach_port_msgcount_t mpie_boost_cnt;
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uint32_t reserved[6];
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} mach_port_info_ext_t;
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typedef struct mach_port_guard_info {
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uint64_t mpgi_guard; /* guard value */
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} mach_port_guard_info_t;
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typedef integer_t *mach_port_info_t; /* varying array of natural_t */
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/* Flavors for mach_port_get/set/assert_attributes() */
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typedef int mach_port_flavor_t;
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#define MACH_PORT_LIMITS_INFO 1 /* uses mach_port_limits_t */
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#define MACH_PORT_RECEIVE_STATUS 2 /* uses mach_port_status_t */
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#define MACH_PORT_DNREQUESTS_SIZE 3 /* info is int */
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#define MACH_PORT_TEMPOWNER 4 /* indicates receive right will be reassigned to another task */
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#define MACH_PORT_IMPORTANCE_RECEIVER 5 /* indicates recieve right accepts priority donation */
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#define MACH_PORT_DENAP_RECEIVER 6 /* indicates receive right accepts de-nap donation */
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#define MACH_PORT_INFO_EXT 7 /* uses mach_port_info_ext_t */
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#define MACH_PORT_GUARD_INFO 8 /* asserts if the strict guard value is correct */
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#define MACH_PORT_SERVICE_THROTTLED 9 /* info is an integer that indicates if service port is throttled or not */
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#define MACH_PORT_LIMITS_INFO_COUNT ((natural_t) \
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(sizeof(mach_port_limits_t)/sizeof(natural_t)))
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#define MACH_PORT_RECEIVE_STATUS_COUNT ((natural_t) \
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(sizeof(mach_port_status_t)/sizeof(natural_t)))
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#define MACH_PORT_DNREQUESTS_SIZE_COUNT 1
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#define MACH_PORT_INFO_EXT_COUNT ((natural_t) \
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(sizeof(mach_port_info_ext_t)/sizeof(natural_t)))
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#define MACH_PORT_GUARD_INFO_COUNT ((natural_t) \
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(sizeof(mach_port_guard_info_t)/sizeof(natural_t)))
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#define MACH_PORT_SERVICE_THROTTLED_COUNT 1
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/*
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* Structure used to pass information about port allocation requests.
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* Must be padded to 64-bits total length.
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*/
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typedef struct mach_port_qos {
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unsigned int name:1; /* name given */
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unsigned int prealloc:1; /* prealloced message */
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boolean_t pad1:30;
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natural_t len;
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} mach_port_qos_t;
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/*
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* Structure used to pass information about the service port
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*/
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#define MACH_SERVICE_PORT_INFO_STRING_NAME_MAX_BUF_LEN 255 /* Maximum length of the port string name buffer */
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typedef struct mach_service_port_info {
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char mspi_string_name[MACH_SERVICE_PORT_INFO_STRING_NAME_MAX_BUF_LEN]; /* Service port's string name */
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uint8_t mspi_domain_type; /* Service port domain */
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} mach_service_port_info_data_t;
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#define MACH_SERVICE_PORT_INFO_COUNT ((char) \
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(sizeof(mach_service_port_info_data_t)/sizeof(char)))
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typedef struct mach_service_port_info * mach_service_port_info_t;
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/*
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* Flags for mach_port_options (used for
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* invocation of mach_port_construct).
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* Indicates attributes to be set for the newly
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* allocated port.
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*/
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#define MPO_CONTEXT_AS_GUARD 0x01 /* Add guard to the port */
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#define MPO_QLIMIT 0x02 /* Set qlimit for the port msg queue */
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#define MPO_TEMPOWNER 0x04 /* Set the tempowner bit of the port */
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#define MPO_IMPORTANCE_RECEIVER 0x08 /* Mark the port as importance receiver */
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#define MPO_INSERT_SEND_RIGHT 0x10 /* Insert a send right for the port */
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#define MPO_STRICT 0x20 /* Apply strict guarding for port */
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#define MPO_DENAP_RECEIVER 0x40 /* Mark the port as App de-nap receiver */
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#define MPO_IMMOVABLE_RECEIVE 0x80 /* Mark the port as immovable; protected by the guard context */
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#define MPO_FILTER_MSG 0x100 /* Allow message filtering */
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#define MPO_TG_BLOCK_TRACKING 0x200 /* Track blocking relationship for thread group during sync IPC */
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#define MPO_SERVICE_PORT 0x400 /* Create a service port with the given name; should be used only by launchd */
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#define MPO_CONNECTION_PORT 0x800 /* Derive new peer connection port from a given service port */
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#define MPO_REPLY_PORT 0x1000 /* Designate port as a reply port. */
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#define MPO_ENFORCE_REPLY_PORT_SEMANTICS 0x2000 /* When talking to this port, local port of mach msg needs to follow reply port semantics.*/
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#define MPO_PROVISIONAL_REPLY_PORT 0x4000 /* Designate port as a provisional reply port. */
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#define MPO_PROVISIONAL_ID_PROT_OPTOUT 0x8000 /* Opted out of EXCEPTION_IDENTITY_PROTECTED violation for now */
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/*
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* Structure to define optional attributes for a newly
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* constructed port.
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*/
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typedef struct mach_port_options {
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uint32_t flags; /* Flags defining attributes for port */
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mach_port_limits_t mpl; /* Message queue limit for port */
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union {
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uint64_t reserved[2]; /* Reserved */
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mach_port_name_t work_interval_port; /* Work interval port */
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mach_service_port_info_t service_port_info; /* Service port (MPO_SERVICE_PORT) */
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mach_port_name_t service_port_name; /* Service port (MPO_CONNECTION_PORT) */
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};
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}mach_port_options_t;
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typedef mach_port_options_t *mach_port_options_ptr_t;
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/* Mach Port Guarding definitions */
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/*
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* EXC_GUARD represents a guard violation for both
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* mach ports and file descriptors. GUARD_TYPE_ is used
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* to differentiate among them.
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*/
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#define GUARD_TYPE_MACH_PORT 0x1
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/* Reasons for exception for a guarded mach port */
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enum mach_port_guard_exception_codes {
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kGUARD_EXC_DESTROY = 1,
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kGUARD_EXC_MOD_REFS = 2,
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kGUARD_EXC_INVALID_OPTIONS = 3,
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kGUARD_EXC_SET_CONTEXT = 4,
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kGUARD_EXC_THREAD_SET_STATE = 5,
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kGUARD_EXC_UNGUARDED = 1u << 3,
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kGUARD_EXC_INCORRECT_GUARD = 1u << 4,
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kGUARD_EXC_IMMOVABLE = 1u << 5,
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kGUARD_EXC_STRICT_REPLY = 1u << 6,
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kGUARD_EXC_MSG_FILTERED = 1u << 7,
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/* start of [optionally] non-fatal guards */
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kGUARD_EXC_INVALID_RIGHT = 1u << 8,
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kGUARD_EXC_INVALID_NAME = 1u << 9,
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kGUARD_EXC_INVALID_VALUE = 1u << 10,
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kGUARD_EXC_INVALID_ARGUMENT = 1u << 11,
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kGUARD_EXC_RIGHT_EXISTS = 1u << 12,
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kGUARD_EXC_KERN_NO_SPACE = 1u << 13,
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|
kGUARD_EXC_KERN_FAILURE = 1u << 14,
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|
kGUARD_EXC_KERN_RESOURCE = 1u << 15,
|
|
kGUARD_EXC_SEND_INVALID_REPLY = 1u << 16,
|
|
kGUARD_EXC_SEND_INVALID_VOUCHER = 1u << 17,
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|
kGUARD_EXC_SEND_INVALID_RIGHT = 1u << 18,
|
|
kGUARD_EXC_RCV_INVALID_NAME = 1u << 19,
|
|
/* start of always non-fatal guards */
|
|
kGUARD_EXC_RCV_GUARDED_DESC = 1u << 20, /* for development only */
|
|
kGUARD_EXC_MOD_REFS_NON_FATAL = 1u << 21,
|
|
kGUARD_EXC_IMMOVABLE_NON_FATAL = 1u << 22,
|
|
kGUARD_EXC_REQUIRE_REPLY_PORT_SEMANTICS = 1u << 23,
|
|
kGUARD_EXC_EXCEPTION_BEHAVIOR_ENFORCE = 1u << 24,
|
|
};
|
|
|
|
#define MAX_FATAL_kGUARD_EXC_CODE (1u << 7)
|
|
|
|
/*
|
|
* Mach port guard flags.
|
|
*/
|
|
#define MPG_FLAGS_NONE (0x00ull)
|
|
|
|
#define MAX_OPTIONAL_kGUARD_EXC_CODE (1u << 19)
|
|
|
|
/*
|
|
* These flags are used as bits in the subcode of kGUARD_EXC_STRICT_REPLY exceptions.
|
|
*/
|
|
#define MPG_FLAGS_STRICT_REPLY_INVALID_REPLY_DISP (0x01ull << 56)
|
|
#define MPG_FLAGS_STRICT_REPLY_INVALID_REPLY_PORT (0x02ull << 56)
|
|
#define MPG_FLAGS_STRICT_REPLY_INVALID_VOUCHER (0x04ull << 56)
|
|
#define MPG_FLAGS_STRICT_REPLY_NO_BANK_ATTR (0x08ull << 56)
|
|
#define MPG_FLAGS_STRICT_REPLY_MISMATCHED_PERSONA (0x10ull << 56)
|
|
#define MPG_FLAGS_STRICT_REPLY_MASK (0xffull << 56)
|
|
|
|
/*
|
|
* These flags are used as bits in the subcode of kGUARD_EXC_MOD_REFS exceptions.
|
|
*/
|
|
#define MPG_FLAGS_MOD_REFS_PINNED_DEALLOC (0x01ull << 56)
|
|
#define MPG_FLAGS_MOD_REFS_PINNED_DESTROY (0x02ull << 56)
|
|
#define MPG_FLAGS_MOD_REFS_PINNED_COPYIN (0x04ull << 56)
|
|
|
|
/*
|
|
* These flags are used as bits in the subcode of kGUARD_EXC_IMMOVABLE exceptions.
|
|
*/
|
|
#define MPG_FLAGS_IMMOVABLE_PINNED (0x01ull << 56)
|
|
|
|
/*
|
|
* Flags for mach_port_guard_with_flags. These flags extend
|
|
* the attributes associated with a guarded port.
|
|
*/
|
|
#define MPG_STRICT 0x01 /* Apply strict guarding for a port */
|
|
#define MPG_IMMOVABLE_RECEIVE 0x02 /* Receive right cannot be moved out of the space */
|
|
|
|
#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_ */
|