/* * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * 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. * * 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, * 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_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * 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. */ /* * 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 * * 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: * * - manipulation of port rights in a given space * - message queue [and port right passing] mechanism * */ #ifndef _MACH_PORT_H_ #define _MACH_PORT_H_ #include #include #include #include /* * mach_port_name_t - the local identity for a Mach port * * 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]. * * Use of this type usually implies just a name - no rights. * See mach_port_t for a type that implies a "named right." * */ typedef natural_t mach_port_name_t; typedef mach_port_name_t *mach_port_name_array_t; /* * 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]. * */ #ifndef _MACH_PORT_T #define _MACH_PORT_T typedef mach_port_name_t mach_port_t; #endif 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 * 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 0 /* intentional loose typing */ #define MACH_PORT_DEAD ((mach_port_name_t) ~0) #define MACH_PORT_VALID(name) \ (((name) != MACH_PORT_NULL) && \ ((name) != MACH_PORT_DEAD)) /* * 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. * */ #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) #else /* NO_PORT_GEN */ #define MACH_PORT_INDEX(name) (name) #define MACH_PORT_GEN(name) (0) #define MACH_PORT_MAKE(index, gen) (index) #endif /* NO_PORT_GEN */ /* * 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 * 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_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; #define MACH_PORT_TYPE(right) \ ((mach_port_type_t)(((mach_port_type_t) 1) \ << ((right) + ((mach_port_right_t) 16)))) #define MACH_PORT_TYPE_NONE ((mach_port_type_t) 0L) #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) #define MACH_PORT_TYPE_LABELH MACH_PORT_TYPE(MACH_PORT_RIGHT_LABELH) /* 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 0x80000000 /* 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 natural_t mach_port_mscount_t; /* make-send count */ typedef natural_t mach_port_msgcount_t; /* number of msgs */ typedef natural_t mach_port_rights_t; /* number of rights */ /* * Are there outstanding send rights for a given port? */ #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 { 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_msgcount_t mps_msgcount; /* number in the queue */ mach_port_rights_t mps_sorights; /* how many send-once rights */ boolean_t mps_srights; /* do send rights exist? */ boolean_t mps_pdrequest; /* port-deleted requested? */ boolean_t mps_nsrequest; /* no-senders requested? */ natural_t mps_flags; /* port flags */ } mach_port_status_t; /* 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 integer_t *mach_port_info_t; /* varying array of natural_t */ /* Flavors for mach_port_get/set_attributes() */ 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_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 /* * Structure used to pass information about port allocation requests. * Must be padded to 64-bits total length. */ typedef struct mach_port_qos { unsigned int name:1; /* name given */ unsigned int prealloc:1; /* prealloced message */ boolean_t pad1:30; natural_t len; } mach_port_qos_t; #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_ */