+++ /dev/null
-/*
- * Copyright (c) 2007 Apple 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@
- */
-/*-
- * Copyright (c) 2005-2006 SPARTA, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <ipc/ipc_space.h>
-#include <ipc/ipc_port.h>
-#include <ipc/ipc_labelh.h>
-#include <kern/ipc_kobject.h>
-#include <mach/security.h>
-#include <security/mac_mach_internal.h>
-
-#if CONFIG_MACF_MACH
-zone_t ipc_labelh_zone;
-
-/*
- * Create a new label handle in the task described by the specified space.
- * The specified label is used in the label handle. The associated port
- * name is copied out to namep and the task is granted send and receive rights.
- */
-kern_return_t
-labelh_new_user(ipc_space_t space, struct label *inl, mach_port_name_t *namep)
-{
- kern_return_t kr;
- ipc_labelh_t lh;
- ipc_entry_t entry;
- ipc_port_t port;
-
- if (space == IS_NULL || space->is_task == NULL)
- return (KERN_INVALID_TASK);
-
- /* XXX - perform entrypoint check here? */
-
- /* JMM - redo as port allocation, kobject set, and then copyout */
- assert(!CONFIG_MACF_MACH);
-
- /*
- * Note: the calling task will have a receive right for the port.
- * This is different from label handles that reference tasks
- * where the kernel holds the receive right and the caller only
- * gets a send right.
- */
- kr = ipc_port_alloc(space, namep, &port);
- if (kr != KERN_SUCCESS)
- return (kr);
- ip_reference(port); /* ipc_port_alloc() does not add a reference */
-
- /* Convert right to MACH_PORT_TYPE_SEND_RECEIVE */
- port->ip_mscount++;
- port->ip_srights++;
- is_write_lock(space);
- /* XXX - must validate space is still active and unwind if not */
- entry = ipc_entry_lookup(space, *namep);
- if (entry != IE_NULL)
- entry->ie_bits |= MACH_PORT_TYPE_SEND;
- is_write_unlock(space);
-
- /* Allocate new label handle, insert port and label. */
- lh = (ipc_labelh_t)zalloc(ipc_labelh_zone);
- lh_lock_init(lh);
- lh->lh_port = port;
- lh->lh_label = *inl;
- lh->lh_type = LABELH_TYPE_USER;
- lh->lh_references = 1; /* unused for LABELH_TYPE_USER */
-
- /* Must call ipc_kobject_set() with port unlocked. */
- ip_unlock(lh->lh_port);
- ipc_kobject_set(lh->lh_port, (ipc_kobject_t)lh, IKOT_LABELH);
-
- return (KERN_SUCCESS);
-}
-
-kern_return_t
-mac_label_new(ipc_space_t space, mach_port_name_t *namep, labelstr_t labelstr)
-{
- struct label inl;
- kern_return_t kr;
-
- mac_task_label_init(&inl);
- if (mac_task_label_internalize(&inl, labelstr))
- return (KERN_INVALID_ARGUMENT);
-
- kr = labelh_new_user(space, &inl, namep);
- if (kr != KERN_SUCCESS) {
- mac_task_label_destroy(&inl);
- return (kr);
- }
-
- return (KERN_SUCCESS);
-}
-
-/*
- * This function should be used to allocate label handles
- * that are stored in other kernel objects, such as tasks.
- * They must be released along with that object.
- * The caller gets one reference, which can be applied to either the
- * port or the ipc_label_t structure itself.
- */
-ipc_labelh_t
-labelh_new(int canblock)
-{
- ipc_labelh_t lh;
-
- lh = (ipc_labelh_t)zalloc_canblock(ipc_labelh_zone, canblock);
- lh_lock_init(lh);
- lh->lh_port = ipc_port_alloc_kernel();
- lh->lh_type = LABELH_TYPE_KERN;
- lh->lh_references = 1;
- ipc_kobject_set(lh->lh_port, (ipc_kobject_t)lh, IKOT_LABELH);
-
- return (lh);
-}
-
-/*
- * Call with old label handle locked.
- * Returned label handle is unlocked.
- */
-ipc_labelh_t
-labelh_duplicate(ipc_labelh_t old)
-{
- ipc_labelh_t lh;
-
- lh = labelh_new(0);
- ip_lock(lh->lh_port);
- mac_task_label_init(&lh->lh_label);
- mac_task_label_copy(&old->lh_label, &lh->lh_label);
- ip_unlock(lh->lh_port);
- return (lh);
-}
-
-/*
- * Call with old label handle locked.
- * Returned label handle is locked.
- */
-ipc_labelh_t
-labelh_modify(ipc_labelh_t old)
-{
- ipc_labelh_t lh;
-
- /*
- * A label handle may only have a single reference.
- * If there are no other references this is a no-op.
- * Otherwise, make a copy we can write to and return it.
- */
- if (old->lh_references == 1)
- return (old);
- lh = labelh_duplicate(old);
- lh_release(old);
- lh_check_unlock(old);
- lh_lock(lh);
- return (lh);
-}
-
-/*
- * Add or drop a reference on an (unlocked) label handle.
- */
-ipc_labelh_t
-labelh_reference(ipc_labelh_t lh)
-{
- lh_lock(lh);
- lh_reference(lh);
- lh_unlock(lh);
- return (lh);
-}
-
-/*
- * Release a reference on an (unlocked) label handle.
- */
-void
-labelh_release(ipc_labelh_t lh)
-{
- lh_lock(lh);
- lh_release(lh);
- lh_check_unlock(lh);
-}
-
-/*
- * Deallocate space associated with the label handle backed by the
- * specified port. For kernel-allocated label handles the
- * label handle reference count should be 0. For user-allocated
- * handles the ref count is not used (it was initialized to 1).
- */
-void
-labelh_destroy(ipc_port_t port)
-{
- ipc_labelh_t lh = (ipc_labelh_t) port->ip_kobject;
-
- mac_task_label_destroy(&lh->lh_label);
- lh_lock_destroy(lh);
- zfree(ipc_labelh_zone, (vm_offset_t)lh);
-}
-#else
-kern_return_t
-mac_label_new(__unused ipc_space_t space,
- __unused mach_port_name_t *namep,
- __unused labelstr_t labelstr)
-{
- return KERN_FAILURE;
-}
-#endif /* MAC_MACH */
projects / apple / xnu.git / blobdiff