1 /*
2  * Copyright (c) 1998-2012 Apple Computer, Inc. All rights reserved.
3  *
4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5  *
6  * This file contains Original Code and/or Modifications of Original Code
7  * as defined in and that are subject to the Apple Public Source License
8  * Version 2.0 (the 'License'). You may not use this file except in
9  * compliance with the License. The rights granted to you under the License
10  * may not be used to create, or enable the creation or redistribution of,
11  * unlawful or unlicensed copies of an Apple operating system, or to
12  * circumvent, violate, or enable the circumvention or violation of, any
13  * terms of an Apple operating system software license agreement.
14  *
15  * Please obtain a copy of the License at
16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
17  *
18  * The Original Code and all software distributed under the License are
19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23  * Please see the License for the specific language governing rights and
24  * limitations under the License.
25  *
26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27  */
28 /*
29  * Copyright (c) 1999 Apple Computer, Inc.  All rights reserved.
30  *
31  */
32 
33 #include <IOKit/assert.h>
34 #include <IOKit/IOLib.h>
35 #include <IOKit/IOKitKeys.h>
36 #include <IOKit/IOBufferMemoryDescriptor.h>
37 #include "RootDomainUserClient.h"
38 #include <IOKit/pwr_mgt/IOPMLibDefs.h>
39 #include <IOKit/pwr_mgt/IOPMPrivate.h>
40 #include <sys/proc.h>
41 
42 #define super IOUserClient
43 
44 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
45 
46 OSDefineMetaClassAndStructors(RootDomainUserClient, IOUserClient)
47 
48 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
49 
50 bool RootDomainUserClient::initWithTask(task_t owningTask, void *security_id,
51                     UInt32 type, OSDictionary * properties)
52 {
53     if (properties)
54     properties->setObject(kIOUserClientCrossEndianCompatibleKey, kOSBooleanTrue);
55 
56     if (!super::initWithTask(owningTask, security_id, type, properties))
57     return false;
58 
59     fOwningTask = owningTask;
60     task_reference (fOwningTask);
61     return true;
62 }
63 
64 
65 bool RootDomainUserClient::start( IOService * provider )
66 {
67     assert(OSDynamicCast(IOPMrootDomain, provider));
68     if(!super::start(provider))
69         return false;
70     fOwner = (IOPMrootDomain *)provider;
71 
72 
73     return true;
74 }
75 
76 IOReturn RootDomainUserClient::secureSleepSystem( uint32_t *return_code )
77 {
78     return secureSleepSystemOptions(NULL, 0, return_code);
79 }
80 
81 IOReturn RootDomainUserClient::secureSleepSystemOptions(
82     const void      *inOptions,
83     IOByteCount     inOptionsSize,
84     uint32_t        *returnCode)
85 {
86 
87     int             local_priv = 0;
88     int             admin_priv = 0;
89     IOReturn        ret = kIOReturnNotPrivileged;
90     OSDictionary    *unserializedOptions =  NULL;
91     OSString        *unserializeErrorString = NULL;
92 
93     ret = clientHasPrivilege(fOwningTask, kIOClientPrivilegeLocalUser);
94     local_priv = (kIOReturnSuccess == ret);
95 
96     ret = clientHasPrivilege(fOwningTask, kIOClientPrivilegeAdministrator);
97     admin_priv = (kIOReturnSuccess == ret);
98 
99 
100     if (inOptions)
101     {
102         unserializedOptions = OSDynamicCast( OSDictionary,
103                                              OSUnserializeXML((const char *)inOptions, inOptionsSize, &unserializeErrorString));
104 
105         if (!unserializedOptions) {
106             IOLog("IOPMRootDomain SleepSystem unserialization failure: %s\n",
107                 unserializeErrorString ? unserializeErrorString->getCStringNoCopy() : "Unknown");
108         }
109     }
110 
111     if ( (local_priv || admin_priv) && fOwner )
112     {
113         proc_t p;
114         p = (proc_t)get_bsdtask_info(fOwningTask);
115         if (p) {
116             fOwner->setProperty("SleepRequestedByPID", proc_pid(p), 32);
117         }
118 
119         if (unserializedOptions)
120         {
121             // Publish Sleep Options in registry under root_domain
122             fOwner->setProperty( kRootDomainSleepOptionsKey, unserializedOptions);
123 
124             *returnCode = fOwner->sleepSystemOptions( unserializedOptions );
125 
126             unserializedOptions->release();
127         } else {
128             // No options
129             // Clear any pre-existing options
130             fOwner->removeProperty( kRootDomainSleepOptionsKey );
131 
132             *returnCode = fOwner->sleepSystemOptions( NULL );
133         }
134 
135     } else {
136         *returnCode = kIOReturnNotPrivileged;
137     }
138 
139     return kIOReturnSuccess;
140 }
141 
142 IOReturn RootDomainUserClient::secureSetAggressiveness(
143     unsigned long   type,
144     unsigned long   newLevel,
145     int             *return_code )
146 {
147     int             local_priv = 0;
148     int             admin_priv = 0;
149     IOReturn        ret = kIOReturnNotPrivileged;
150 
151     ret = clientHasPrivilege(fOwningTask, kIOClientPrivilegeLocalUser);
152     local_priv = (kIOReturnSuccess == ret);
153 
154     ret = clientHasPrivilege(fOwningTask, kIOClientPrivilegeAdministrator);
155     admin_priv = (kIOReturnSuccess == ret);
156 
157     if((local_priv || admin_priv) && fOwner) {
158         *return_code = fOwner->setAggressiveness(type, newLevel);
159     } else {
160         *return_code = kIOReturnNotPrivileged;
161     }
162     return kIOReturnSuccess;
163 }
164 
165 IOReturn RootDomainUserClient::secureSetMaintenanceWakeCalendar(
166     IOPMCalendarStruct      *inCalendar,
167     uint32_t                *returnCode)
168 {
169     int                     admin_priv = 0;
170     IOReturn                ret = kIOReturnNotPrivileged;
171 
172     ret = clientHasPrivilege(fOwningTask, kIOClientPrivilegeAdministrator);
173     admin_priv = (kIOReturnSuccess == ret);
174 
175     if (admin_priv && fOwner) {
176         *returnCode = fOwner->setMaintenanceWakeCalendar(inCalendar);
177     } else {
178         *returnCode = kIOReturnNotPrivileged;
179     }
180     return kIOReturnSuccess;
181 }
182 
183 IOReturn RootDomainUserClient::secureSetUserAssertionLevels(
184     uint32_t    assertionBitfield)
185 {
186     int                     admin_priv = 0;
187     IOReturn                ret = kIOReturnNotPrivileged;
188 
189     ret = clientHasPrivilege(fOwningTask, kIOClientPrivilegeAdministrator);
190     admin_priv = (kIOReturnSuccess == ret);
191 
192     if (admin_priv && fOwner) {
193         ret = fOwner->setPMAssertionUserLevels(assertionBitfield);
194     } else {
195         ret = kIOReturnNotPrivileged;
196     }
197     return kIOReturnSuccess;
198 }
199 
200 IOReturn RootDomainUserClient::secureGetSystemSleepType(
201     uint32_t    *outSleepType)
202 {
203     int                     admin_priv = 0;
204     IOReturn                ret;
205 
206     ret = clientHasPrivilege(fOwningTask, kIOClientPrivilegeAdministrator);
207     admin_priv = (kIOReturnSuccess == ret);
208 
209     if (admin_priv && fOwner) {
210         ret = fOwner->getSystemSleepType(outSleepType);
211     } else {
212         ret = kIOReturnNotPrivileged;
213     }
214     return ret;
215 }
216 
217 IOReturn RootDomainUserClient::clientClose( void )
218 {
219     detach(fOwner);
220 
221     if(fOwningTask) {
222         task_deallocate(fOwningTask);
223         fOwningTask = 0;
224     }
225 
226     return kIOReturnSuccess;
227 }
228 
229 IOReturn RootDomainUserClient::externalMethod(
230     uint32_t selector,
231     IOExternalMethodArguments * arguments,
232     IOExternalMethodDispatch * dispatch __unused,
233     OSObject * target __unused,
234     void * reference __unused )
235 {
236     IOReturn    ret = kIOReturnBadArgument;
237 
238     switch (selector)
239     {
240         case kPMSetAggressiveness:
241             if ((2 == arguments->scalarInputCount)
242                 && (1 == arguments->scalarOutputCount))
243             {
244                 ret = this->secureSetAggressiveness(
245                                 (unsigned long)arguments->scalarInput[0],
246                                 (unsigned long)arguments->scalarInput[1],
247                                 (int *)&arguments->scalarOutput[0]);
248             }
249             break;
250 
251         case kPMGetAggressiveness:
252             if ((1 == arguments->scalarInputCount)
253                 && (1 == arguments->scalarOutputCount))
254             {
255                 ret = fOwner->getAggressiveness(
256                                 (unsigned long)arguments->scalarInput[0],
257                                 (unsigned long *)&arguments->scalarOutput[0]);
258             }
259             break;
260 
261         case kPMSleepSystem:
262             if (1 == arguments->scalarOutputCount)
263             {
264                 ret = this->secureSleepSystem(
265                                 (uint32_t *)&arguments->scalarOutput[0]);
266             }
267             break;
268 
269         case kPMAllowPowerChange:
270             if (1 == arguments->scalarInputCount)
271             {
272                 ret = fOwner->allowPowerChange(
273                                 arguments->scalarInput[0]);
274             }
275             break;
276 
277         case kPMCancelPowerChange:
278             if (1 == arguments->scalarInputCount)
279             {
280                 ret = fOwner->cancelPowerChange(
281                                 arguments->scalarInput[0]);
282             }
283             break;
284 
285         case kPMShutdownSystem:
286             // deperecated interface
287             ret = kIOReturnUnsupported;
288             break;
289 
290         case kPMRestartSystem:
291             // deperecated interface
292             ret = kIOReturnUnsupported;
293             break;
294 
295         case kPMSleepSystemOptions:
296             ret = this->secureSleepSystemOptions(
297                     arguments->structureInput,
298                     arguments->structureInputSize,
299                     (uint32_t *)&arguments->scalarOutput[0]);
300             break;
301         case kPMSetMaintenanceWakeCalendar:
302             if ((arguments->structureInputSize >= sizeof(IOPMCalendarStruct)) &&
303                 (arguments->structureOutputSize >= sizeof(uint32_t) )) {
304                 ret = this->secureSetMaintenanceWakeCalendar(
305                                                              (IOPMCalendarStruct *)arguments->structureInput,
306                                                              (uint32_t *)&arguments->structureOutput);
307                 arguments->structureOutputSize = sizeof(uint32_t);
308             }
309             break;
310 
311         case kPMSetUserAssertionLevels:
312             ret = this->secureSetUserAssertionLevels(
313                         (uint32_t)arguments->scalarInput[0]);
314             break;
315 
316         case kPMActivityTickle:
317             if ( fOwner->checkSystemCanSustainFullWake() )
318             {
319                fOwner->reportUserInput( );
320                fOwner->setProperty(kIOPMRootDomainWakeTypeKey, "UserActivity Assertion");
321             }
322             ret = kIOReturnSuccess;
323             break;
324 
325         case kPMSetClamshellSleepState:
326             fOwner->setDisableClamShellSleep(arguments->scalarInput[0] ? true : false);
327             ret = kIOReturnSuccess;
328             break;
329 
330         case kPMGetSystemSleepType:
331             if (1 == arguments->scalarOutputCount)
332             {
333                 ret = this->secureGetSystemSleepType(
334                         (uint32_t *) &arguments->scalarOutput[0]);
335             }
336             break;
337 
338 #if defined(__i386__) || defined(__x86_64__)
339         case kPMSleepWakeWatchdogEnable:
340             ret = clientHasPrivilege(fOwningTask, kIOClientPrivilegeAdministrator);
341             if (ret == kIOReturnSuccess)
342                fOwner->sleepWakeDebugEnableWdog();
343             break;
344 
345 
346         case kPMSleepWakeDebugTrig:
347             ret = clientHasPrivilege(fOwningTask, kIOClientPrivilegeAdministrator);
348             if (ret == kIOReturnSuccess)
349                fOwner->sleepWakeDebugTrig(false);
350             break;
351 #endif
352 
353         case kPMSetDisplayPowerOn:
354             if (1 == arguments->scalarInputCount)
355             {
356                 ret = clientHasPrivilege(fOwningTask, kIOClientPrivilegeAdministrator);
357                 if (ret == kIOReturnSuccess)
358                     fOwner->setDisplayPowerOn((uint32_t)arguments->scalarInput[0]);
359             }
360             break;
361 
362         default:
363             // bad selector
364             return kIOReturnBadArgument;
365     }
366 
367     return ret;
368 }
369 
370 /* getTargetAndMethodForIndex
371  * Not used. We prefer to use externalMethod() for user client invocations.
372  * We maintain getTargetAndExternalMethod since it's an exported symbol,
373  * and only for that reason.
374  */
375 IOExternalMethod * RootDomainUserClient::getTargetAndMethodForIndex(
376     IOService ** targetP, UInt32 index )
377 {
378     // DO NOT EDIT
379     return super::getTargetAndMethodForIndex(targetP, index);
380 }
381 
382 /* setPreventative
383  * Does nothing. Exists only for exported symbol compatibility.
384  */
385 void
386 RootDomainUserClient::setPreventative(UInt32 on_off, UInt32 types_of_sleep)
387 { return; } // DO NOT EDIT
388