summaryrefslogtreecommitdiffstats
path: root/src/installation_proxy.c
blob: a32fc503b3cfaec51848cd01a219ab33fb18a98f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
/*
 * installation_proxy.c
 * com.apple.mobile.installation_proxy service implementation.
 *
 * Copyright (c) 2009 Nikias Bassen, All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA 
 */

#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <plist/plist.h>

#include "installation_proxy.h"
#include "property_list_service.h"
#include "debug.h"

struct instproxy_status_data {
	instproxy_client_t client;
	instproxy_status_cb_t cbfunc;
	char *operation;
	void *user_data;
};

/**
 * Locks an installation_proxy client, used for thread safety.
 *
 * @param client The installation_proxy client to lock
 */
static void instproxy_lock(instproxy_client_t client)
{
	debug_info("InstallationProxy: Locked");
#ifdef WIN32
	EnterCriticalSection(&client->mutex);
#else
	pthread_mutex_lock(&client->mutex);
#endif
}

/**
 * Unlocks an installation_proxy client, used for thread safety.
 * 
 * @param client The installation_proxy client to lock
 */
static void instproxy_unlock(instproxy_client_t client)
{
	debug_info("InstallationProxy: Unlocked");
#ifdef WIN32
	LeaveCriticalSection(&client->mutex);
#else
	pthread_mutex_unlock(&client->mutex);
#endif
}

/**
 * Convert a property_list_service_error_t value to an instproxy_error_t value.
 * Used internally to get correct error codes.
 *
 * @param err A property_list_service_error_t error code
 *
 * @return A matching instproxy_error_t error code,
 *     INSTPROXY_E_UNKNOWN_ERROR otherwise.
 */
static instproxy_error_t instproxy_error(property_list_service_error_t err)
{
	switch (err) {
		case PROPERTY_LIST_SERVICE_E_SUCCESS:
			return INSTPROXY_E_SUCCESS;
		case PROPERTY_LIST_SERVICE_E_INVALID_ARG:
			return INSTPROXY_E_INVALID_ARG;
		case PROPERTY_LIST_SERVICE_E_PLIST_ERROR:
			return INSTPROXY_E_PLIST_ERROR;
		case PROPERTY_LIST_SERVICE_E_MUX_ERROR:
			return INSTPROXY_E_CONN_FAILED;
		default:
			break;
	}
	return INSTPROXY_E_UNKNOWN_ERROR;
}

/**
 * Connects to the installation_proxy service on the specified device.
 *
 * @param device The device to connect to
 * @param port Destination port (usually given by lockdownd_start_service).
 * @param client Pointer that will be set to a newly allocated
 *     instproxy_client_t upon successful return.
 *
 * @return INSTPROXY_E_SUCCESS on success, or an INSTPROXY_E_* error value
 *     when an error occured.
 */
instproxy_error_t instproxy_client_new(idevice_t device, uint16_t port, instproxy_client_t *client)
{
	if (!device)
		return INSTPROXY_E_INVALID_ARG;

	property_list_service_client_t plistclient = NULL;
	if (property_list_service_client_new(device, port, &plistclient) != PROPERTY_LIST_SERVICE_E_SUCCESS) {
		return INSTPROXY_E_CONN_FAILED;
	}

	instproxy_client_t client_loc = (instproxy_client_t) malloc(sizeof(struct instproxy_client_private));
	client_loc->parent = plistclient;
#ifdef WIN32
	InitializeCriticalSection(&client_loc->mutex);
	client_loc->status_updater = NULL;
#else
	pthread_mutex_init(&client_loc->mutex, NULL);
	client_loc->status_updater = (pthread_t)NULL;
#endif

	*client = client_loc;
	return INSTPROXY_E_SUCCESS;
}

/**
 * Disconnects an installation_proxy client from the device and frees up the
 * installation_proxy client data.
 *
 * @param client The installation_proxy client to disconnect and free.
 *
 * @return INSTPROXY_E_SUCCESS on success
 *      or INSTPROXY_E_INVALID_ARG if client is NULL.
 */
instproxy_error_t instproxy_client_free(instproxy_client_t client)
{
	if (!client)
		return INSTPROXY_E_INVALID_ARG;

	property_list_service_client_free(client->parent);
	client->parent = NULL;
	if (client->status_updater) {
		debug_info("joining status_updater");
#ifdef WIN32
		WaitForSingleObject(client->status_updater, INFINITE);
#else
		pthread_join(client->status_updater, NULL);
#endif
	}
#ifdef WIN32
	DeleteCriticalSection(&client->mutex);
#else
	pthread_mutex_destroy(&client->mutex);
#endif
	free(client);

	return INSTPROXY_E_SUCCESS;
}

/**
 * Send a command with specified options to the device.
 * Only used internally.
 *
 * @param client The connected installation_proxy client.
 * @param command The command to execute. Required.
 * @param client_options The client options to use, as PLIST_DICT, or NULL.
 * @param appid The ApplicationIdentifier to add or NULL if not required.
 * @param package_path The installation package path or NULL if not required.
 *
 * @return INSTPROXY_E_SUCCESS on success or an INSTPROXY_E_* error value if
 *     an error occured.
 */
static instproxy_error_t instproxy_send_command(instproxy_client_t client, const char *command, plist_t client_options, const char *appid, const char *package_path)
{
	if (!client || !command || (client_options && (plist_get_node_type(client_options) != PLIST_DICT)))
		return INSTPROXY_E_INVALID_ARG;

	plist_t dict = plist_new_dict();
	if (appid) {
		plist_dict_insert_item(dict, "ApplicationIdentifier", plist_new_string(appid));
	}
	if (client_options && (plist_dict_get_size(client_options) > 0)) {
		plist_dict_insert_item(dict, "ClientOptions", plist_copy(client_options));
	}
	plist_dict_insert_item(dict, "Command", plist_new_string(command));
	if (package_path) {
		plist_dict_insert_item(dict, "PackagePath", plist_new_string(package_path));
	}

	instproxy_error_t err = instproxy_error(property_list_service_send_xml_plist(client->parent, dict));
	plist_free(dict);
	return err;
}

/**
 * List installed applications. This function runs synchronously.
 *
 * @param client The connected installation_proxy client
 * @param client_options The client options to use, as PLIST_DICT, or NULL.
 *        Valid client options include:
 *          "ApplicationType" -> "User"
 *          "ApplicationType" -> "System"
 * @param result Pointer that will be set to a plist that will hold an array
 *        of PLIST_DICT holding information about the applications found.
 *
 * @return INSTPROXY_E_SUCCESS on success or an INSTPROXY_E_* error value if
 *     an error occured.
 */
instproxy_error_t instproxy_browse(instproxy_client_t client, plist_t client_options, plist_t *result)
{
	if (!client || !client->parent || !result)
		return INSTPROXY_E_INVALID_ARG;

	instproxy_error_t res = INSTPROXY_E_UNKNOWN_ERROR;

	instproxy_lock(client);
	res = instproxy_send_command(client, "Browse", client_options, NULL, NULL);
	if (res != INSTPROXY_E_SUCCESS) {
		debug_info("could not send plist");
		goto leave_unlock;
	}

	int browsing = 0;
	plist_t apps_array = plist_new_array();
	plist_t dict = NULL;

	do {
		browsing = 0;
		dict = NULL;
		res = instproxy_error(property_list_service_receive_plist(client->parent, &dict));
		if (res != INSTPROXY_E_SUCCESS) {
			break;
		}
		if (dict) {
			uint64_t i;
			uint64_t current_amount = 0;
			char *status = NULL;
			plist_t camount = plist_dict_get_item(dict, "CurrentAmount");
			plist_t pstatus = plist_dict_get_item(dict, "Status");
			if (camount) {
				plist_get_uint_val(camount, &current_amount);
			}
			if (current_amount > 0) {
				plist_t current_list = plist_dict_get_item(dict, "CurrentList");
				for (i = 0; current_list && (i < current_amount); i++) {
					plist_t item = plist_array_get_item(current_list, i);
					plist_array_append_item(apps_array, plist_copy(item));
				}
			}
			if (pstatus) {
				plist_get_string_val(pstatus, &status);
			}
			if (status) {
				if (!strcmp(status, "BrowsingApplications")) {
					browsing = 1;
				} else if (!strcmp(status, "Complete")) {
					debug_info("Browsing applications completed");
					res = INSTPROXY_E_SUCCESS;
				}
				free(status);
			}
			plist_free(dict);
		}
	} while (browsing);

	if (res == INSTPROXY_E_SUCCESS) {
		*result = apps_array;
	}

leave_unlock:
	instproxy_unlock(client);
	return res;
}

/**
 * Internally used function that will synchronously receive messages from
 * the specified installation_proxy until it completes or an error occurs.
 *
 * If status_cb is not NULL, the callback function will be called each time
 * a status update or error message is received.
 *
 * @param client The connected installation proxy client
 * @param status_cb Pointer to a callback function or NULL
 * @param operation Operation name. Will be passed to the callback function
 *        in async mode or shown in debug messages in sync mode. 
 * @param user_data Callback data passed to status_cb.
 */
static instproxy_error_t instproxy_perform_operation(instproxy_client_t client, instproxy_status_cb_t status_cb, const char *operation, void *user_data)
{
	instproxy_error_t res = INSTPROXY_E_UNKNOWN_ERROR;
	int ok = 1;
	plist_t dict = NULL;

	do {
		instproxy_lock(client);
		res = instproxy_error(property_list_service_receive_plist_with_timeout(client->parent, &dict, 30000));
		instproxy_unlock(client);
		if (res != INSTPROXY_E_SUCCESS) {
			debug_info("could not receive plist, error %d", res);
			break;
		}
		if (dict) {
			/* invoke callback function */
			if (status_cb) {
				status_cb(operation, dict, user_data);
			}
			/* check for 'Error', so we can abort cleanly */
			plist_t err = plist_dict_get_item(dict, "Error");
			if (err) {
#ifndef STRIP_DEBUG_CODE
				char *err_msg = NULL;
				plist_get_string_val(err, &err_msg);
				if (err_msg) {
					debug_info("(%s): ERROR: %s", operation, err_msg);
					free(err_msg);
				}
#endif
				ok = 0;
				res = INSTPROXY_E_OP_FAILED;
			}
			/* get 'Status' */
			plist_t status = plist_dict_get_item(dict, "Status");
			if (status) {
				char *status_msg = NULL;
				plist_get_string_val(status, &status_msg);
				if (status_msg) {
					if (!strcmp(status_msg, "Complete")) {
						ok = 0;
						res = INSTPROXY_E_SUCCESS;
					}
#ifndef STRIP_DEBUG_CODE
					plist_t npercent = plist_dict_get_item(dict, "PercentComplete");
					if (npercent) {
						uint64_t val = 0;
						int percent;
						plist_get_uint_val(npercent, &val);
						percent = val;
						debug_info("(%s): %s (%d%%)", operation, status_msg, percent);
					} else {
						debug_info("(%s): %s", operation, status_msg);
					}
#endif
					free(status_msg);
				}
			}
			plist_free(dict);
			dict = NULL;
		}
	} while (ok && client->parent);

	return res;
}

/**
 * Internally used status updater thread function that will call the specified
 * callback function when status update messages (or error messages) are
 * received.
 *
 * @param arg Pointer to an allocated struct instproxy_status_data that holds
 *     the required data about the connected client and the callback function.
 *
 * @return Always NULL.
 */
static void* instproxy_status_updater(void* arg)
{	
	struct instproxy_status_data *data = (struct instproxy_status_data*)arg;

	/* run until the operation is complete or an error occurs */
	(void)instproxy_perform_operation(data->client, data->cbfunc, data->operation, data->user_data);

	/* cleanup */
	instproxy_lock(data->client);
	debug_info("done, cleaning up.");
	if (data->operation) {
	    free(data->operation);
	}
#ifdef WIN32
	data->client->status_updater = NULL;
#else
	data->client->status_updater = (pthread_t)NULL;
#endif
	instproxy_unlock(data->client);
	free(data);

	return NULL;
}

/**
 * Internally used helper function that creates a status updater thread which
 * will call the passed callback function when status updates occur.
 * If status_cb is NULL no thread will be created, but the operation will
 * run synchronously until it completes or an error occurs.
 *
 * @param client The connected installation proxy client
 * @param status_cb Pointer to a callback function or NULL
 * @param operation Operation name. Will be passed to the callback function
 *        in async mode or shown in debug messages in sync mode.
 * @param user_data Callback data passed to status_cb.
 *
 * @return INSTPROXY_E_SUCCESS when the thread was created (async mode), or
 *         when the operation completed successfully (sync).
 *         An INSTPROXY_E_* error value is returned if an error occured.
 */
static instproxy_error_t instproxy_create_status_updater(instproxy_client_t client, instproxy_status_cb_t status_cb, const char *operation, void *user_data)
{
	instproxy_error_t res = INSTPROXY_E_UNKNOWN_ERROR;
	if (status_cb) {
		/* async mode */
		struct instproxy_status_data *data = (struct instproxy_status_data*)malloc(sizeof(struct instproxy_status_data));
		if (data) {
			data->client = client;
			data->cbfunc = status_cb;
			data->operation = strdup(operation);
			data->user_data = user_data;

#ifdef WIN32
			client->status_updater = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)instproxy_status_updater, data, 0, NULL);
			if (client->status_updater != INVALID_HANDLE_VALUE) {
				res = INSTPROXY_E_SUCCESS;
			} else {
				client->status_updater = NULL;
			}
#else
			if (pthread_create(&client->status_updater, NULL, instproxy_status_updater, data) == 0) {
				res = INSTPROXY_E_SUCCESS;
			}
#endif
		}
	} else {
		/* sync mode */
		res = instproxy_perform_operation(client, NULL, operation, NULL);
	}
	return res;
}


/**
 * Internal function used by instproxy_install and instproxy_upgrade.
 *
 * @param client The connected installation_proxy client
 * @param pkg_path Path of the installation package (inside the AFC jail)
 * @param client_options The client options to use, as PLIST_DICT, or NULL.
 * @param status_cb Callback function for progress and status information. If
 *        NULL is passed, this function will run synchronously.
 * @param command The command to execute.
 * @param user_data Callback data passed to status_cb.
 *
 * @return INSTPROXY_E_SUCCESS on success or an INSTPROXY_E_* error value if
 *     an error occured. 
 */
static instproxy_error_t instproxy_install_or_upgrade(instproxy_client_t client, const char *pkg_path, plist_t client_options, instproxy_status_cb_t status_cb, const char *command, void *user_data)
{
	if (!client || !client->parent || !pkg_path) {
		return INSTPROXY_E_INVALID_ARG;
	}
	if (client->status_updater) {
		return INSTPROXY_E_OP_IN_PROGRESS;
	}

	instproxy_lock(client);
	instproxy_error_t res = instproxy_send_command(client, command, client_options, NULL, pkg_path);
	instproxy_unlock(client);

	if (res != INSTPROXY_E_SUCCESS) {
		debug_info("could not send plist, error %d", res);
		return res;
	}

	return instproxy_create_status_updater(client, status_cb, command, user_data);
}

/**
 * Install an application on the device.
 *
 * @param client The connected installation_proxy client
 * @param pkg_path Path of the installation package (inside the AFC jail)
 * @param client_options The client options to use, as PLIST_DICT, or NULL.
 *        Valid options include:
 *          "iTunesMetadata" -> PLIST_DATA
 *          "ApplicationSINF" -> PLIST_DATA
 *          "PackageType" -> "Developer"
 *        If PackageType -> Developer is specified, then pkg_path points to
 *        an .app directory instead of an install package.
 * @param status_cb Callback function for progress and status information. If
 *        NULL is passed, this function will run synchronously.
 * @param user_data Callback data passed to status_cb.
 *
 * @return INSTPROXY_E_SUCCESS on success or an INSTPROXY_E_* error value if
 *     an error occured.
 *
 * @note If a callback function is given (async mode), this function returns
 *     INSTPROXY_E_SUCCESS immediately if the status updater thread has been
 *     created successfully; any error occuring during the operation has to be
 *     handled inside the specified callback function.
 */
instproxy_error_t instproxy_install(instproxy_client_t client, const char *pkg_path, plist_t client_options, instproxy_status_cb_t status_cb, void *user_data)
{
	return instproxy_install_or_upgrade(client, pkg_path, client_options, status_cb, "Install", user_data);
}

/**
 * Upgrade an application on the device. This function is nearly the same as
 * instproxy_install; the difference is that the installation progress on the
 * device is faster if the application is already installed.
 *
 * @param client The connected installation_proxy client
 * @param pkg_path Path of the installation package (inside the AFC jail)
 * @param client_options The client options to use, as PLIST_DICT, or NULL.
 *        Valid options include:
 *          "iTunesMetadata" -> PLIST_DATA
 *          "ApplicationSINF" -> PLIST_DATA
 *          "PackageType" -> "Developer"
 *        If PackageType -> Developer is specified, then pkg_path points to
 *        an .app directory instead of an install package.
 * @param status_cb Callback function for progress and status information. If
 *        NULL is passed, this function will run synchronously.
 * @param user_data Callback data passed to status_cb.
 *
 * @return INSTPROXY_E_SUCCESS on success or an INSTPROXY_E_* error value if
 *     an error occured.
 *
 * @note If a callback function is given (async mode), this function returns
 *     INSTPROXY_E_SUCCESS immediately if the status updater thread has been
 *     created successfully; any error occuring during the operation has to be
 *     handled inside the specified callback function.
 */
instproxy_error_t instproxy_upgrade(instproxy_client_t client, const char *pkg_path, plist_t client_options, instproxy_status_cb_t status_cb, void *user_data)
{
	return instproxy_install_or_upgrade(client, pkg_path, client_options, status_cb, "Upgrade", user_data);
}

/**
 * Uninstall an application from the device.
 *
 * @param client The connected installation proxy client
 * @param appid ApplicationIdentifier of the app to uninstall
 * @param client_options The client options to use, as PLIST_DICT, or NULL.
 *        Currently there are no known client options, so pass NULL here.
 * @param status_cb Callback function for progress and status information. If
 *        NULL is passed, this function will run synchronously.
 * @param user_data Callback data passed to status_cb.
 *
 * @return INSTPROXY_E_SUCCESS on success or an INSTPROXY_E_* error value if
 *     an error occured.
 *
 * @note If a callback function is given (async mode), this function returns
 *     INSTPROXY_E_SUCCESS immediately if the status updater thread has been
 *     created successfully; any error occuring during the operation has to be
 *     handled inside the specified callback function.
 */
instproxy_error_t instproxy_uninstall(instproxy_client_t client, const char *appid, plist_t client_options, instproxy_status_cb_t status_cb, void *user_data)
{
	if (!client || !client->parent || !appid) {
		return INSTPROXY_E_INVALID_ARG;
	}

	if (client->status_updater) {
		return INSTPROXY_E_OP_IN_PROGRESS;
	}

	instproxy_error_t res = INSTPROXY_E_UNKNOWN_ERROR;
	plist_t dict = plist_new_dict();
	plist_dict_insert_item(dict, "ApplicationIdentifier", plist_new_string(appid));
	plist_dict_insert_item(dict, "Command", plist_new_string("Uninstall"));

	instproxy_lock(client);
	res = instproxy_send_command(client, "Uninstall", client_options, appid, NULL);
	instproxy_unlock(client);

	plist_free(dict);

	if (res != INSTPROXY_E_SUCCESS) {
		debug_info("could not send plist, error %d", res);
		return res;
	}

	return instproxy_create_status_updater(client, status_cb, "Uninstall", user_data);
}

/**
 * List archived applications. This function runs synchronously.
 *
 * @see instproxy_archive
 *
 * @param client The connected installation_proxy client
 * @param client_options The client options to use, as PLIST_DICT, or NULL.
 *        Currently there are no known client options, so pass NULL here.
 * @param result Pointer that will be set to a plist containing a PLIST_DICT
 *        holding information about the archived applications found.
 *
 * @return INSTPROXY_E_SUCCESS on success or an INSTPROXY_E_* error value if
 *     an error occured.
 */
instproxy_error_t instproxy_lookup_archives(instproxy_client_t client, plist_t client_options, plist_t *result)
{
	if (!client || !client->parent || !result)
		return INSTPROXY_E_INVALID_ARG;

	instproxy_lock(client);
	instproxy_error_t res = instproxy_send_command(client, "LookupArchives", client_options, NULL, NULL);

	if (res != INSTPROXY_E_SUCCESS) {
		debug_info("could not send plist, error %d", res);
		goto leave_unlock;
	}

	res = instproxy_error(property_list_service_receive_plist(client->parent, result));
	if (res != INSTPROXY_E_SUCCESS) {
		debug_info("could not receive plist, error %d", res);
		goto leave_unlock;
	}

	res = INSTPROXY_E_SUCCESS;

leave_unlock:
	instproxy_unlock(client);
	return res;
}

/**
 * Archive an application on the device.
 * This function tells the device to make an archive of the specified
 * application. This results in the device creating a ZIP archive in the
 * 'ApplicationArchives' directory and uninstalling the application.
 *
 * @param client The connected installation proxy client
 * @param appid ApplicationIdentifier of the app to archive.
 * @param client_options The client options to use, as PLIST_DICT, or NULL.
 *        Valid options include:
 *          "SkipUninstall" -> Boolean
 *          "ArchiveType" -> "ApplicationOnly" 
 * @param status_cb Callback function for progress and status information. If
 *        NULL is passed, this function will run synchronously.
 * @param user_data Callback data passed to status_cb.
 *
 * @return INSTPROXY_E_SUCCESS on success or an INSTPROXY_E_* error value if
 *     an error occured.
 *
 * @note If a callback function is given (async mode), this function returns
 *     INSTPROXY_E_SUCCESS immediately if the status updater thread has been
 *     created successfully; any error occuring during the operation has to be
 *     handled inside the specified callback function.
 */
instproxy_error_t instproxy_archive(instproxy_client_t client, const char *appid, plist_t client_options, instproxy_status_cb_t status_cb, void *user_data)
{
	if (!client || !client->parent || !appid)
		return INSTPROXY_E_INVALID_ARG;

	if (client->status_updater) {
		return INSTPROXY_E_OP_IN_PROGRESS;
	}

	instproxy_lock(client);
	instproxy_error_t res = instproxy_send_command(client, "Archive", client_options, appid, NULL);
	instproxy_unlock(client);

	if (res != INSTPROXY_E_SUCCESS) {
		debug_info("could not send plist, error %d", res);
		return res;
	}
	return instproxy_create_status_updater(client, status_cb, "Archive", user_data);
}

/**
 * Restore a previously archived application on the device.
 * This function is the counterpart to instproxy_archive.
 * @see instproxy_archive
 *
 * @param client The connected installation proxy client
 * @param appid ApplicationIdentifier of the app to restore.
 * @param client_options The client options to use, as PLIST_DICT, or NULL.
 *        Currently there are no known client options, so pass NULL here.
 * @param status_cb Callback function for progress and status information. If
 *        NULL is passed, this function will run synchronously.
 * @param user_data Callback data passed to status_cb.
 *
 * @return INSTPROXY_E_SUCCESS on success or an INSTPROXY_E_* error value if
 *     an error occured.
 *
 * @note If a callback function is given (async mode), this function returns
 *     INSTPROXY_E_SUCCESS immediately if the status updater thread has been
 *     created successfully; any error occuring during the operation has to be
 *     handled inside the specified callback function.
 */
instproxy_error_t instproxy_restore(instproxy_client_t client, const char *appid, plist_t client_options, instproxy_status_cb_t status_cb, void *user_data)
{
	if (!client || !client->parent || !appid)
		return INSTPROXY_E_INVALID_ARG;

	if (client->status_updater) {
		return INSTPROXY_E_OP_IN_PROGRESS;
	}

	instproxy_lock(client);
	instproxy_error_t res = instproxy_send_command(client, "Restore", client_options, appid, NULL);
	instproxy_unlock(client);

	if (res != INSTPROXY_E_SUCCESS) {
		debug_info("could not send plist, error %d", res);
		return res;
	}
	return instproxy_create_status_updater(client, status_cb, "Restore", user_data);
}

/**
 * Removes a previously archived application from the device.
 * This function removes the ZIP archive from the 'ApplicationArchives'
 * directory.
 *
 * @param client The connected installation proxy client
 * @param appid ApplicationIdentifier of the archived app to remove.
 * @param client_options The client options to use, as PLIST_DICT, or NULL.
 *        Currently there are no known client options, so passing NULL is fine.
 * @param status_cb Callback function for progress and status information. If
 *        NULL is passed, this function will run synchronously.
 * @param user_data Callback data passed to status_cb.
 *
 * @return INSTPROXY_E_SUCCESS on success or an INSTPROXY_E_* error value if
 *     an error occured.
 *
 * @note If a callback function is given (async mode), this function returns
 *     INSTPROXY_E_SUCCESS immediately if the status updater thread has been
 *     created successfully; any error occuring during the operation has to be
 *     handled inside the specified callback function.
 */
instproxy_error_t instproxy_remove_archive(instproxy_client_t client, const char *appid, plist_t client_options, instproxy_status_cb_t status_cb, void *user_data)
{
	if (!client || !client->parent || !appid)
		return INSTPROXY_E_INVALID_ARG;

	if (client->status_updater) {
		return INSTPROXY_E_OP_IN_PROGRESS;
	}

	instproxy_lock(client);
	instproxy_error_t res = instproxy_send_command(client, "RemoveArchive", client_options, appid, NULL);
	instproxy_unlock(client);

	if (res != INSTPROXY_E_SUCCESS) {
		debug_info("could not send plist, error %d", res);
		return res;
	}
	return instproxy_create_status_updater(client, status_cb, "RemoveArchive", user_data);
}

/**
 * Create a new client_options plist.
 *
 * @return A new plist_t of type PLIST_DICT. 
 */
plist_t instproxy_client_options_new()
{
	return plist_new_dict();
}

/**
 * Add one or more new key:value pairs to the given client_options.
 *
 * @param client_options The client options to modify.
 * @param ... KEY, VALUE, [KEY, VALUE], NULL
 *
 * @note The keys and values passed are expected to be strings, except for
 *       "ApplicationSINF" and "iTunesMetadata" expecting a plist node of type
 *       PLIST_DATA as value, or "SkipUninstall" needing int as value.
 */
void instproxy_client_options_add(plist_t client_options, ...)
{
	if (!client_options)
		return;
	va_list args;
	va_start(args, client_options);
	char *arg = va_arg(args, char*);
	while (arg) {
		char *key = strdup(arg);
		if (!strcmp(key, "SkipUninstall")) {
			int intval = va_arg(args, int);
			plist_dict_insert_item(client_options, key, plist_new_bool(intval));
		} else if (!strcmp(key, "ApplicationSINF") || !strcmp(key, "iTunesMetadata")) {
			plist_t plistval = va_arg(args, plist_t);
			if (!plistval) {
				free(key);
				break;
			}
			plist_dict_insert_item(client_options, key, plist_copy(plistval));
		} else {
			char *strval = va_arg(args, char*);
			if (!strval) {
				free(key);
				break;
			}
			plist_dict_insert_item(client_options, key, plist_new_string(strval));
		}
		free(key);
		arg = va_arg(args, char*);
	}
	va_end(args);
}

/**
 * Free client_options plist.
 *
 * @param client_options The client options plist to free. Does nothing if NULL
 *        is passed.
 */
void instproxy_client_options_free(plist_t client_options)
{
	if (client_options) {
		plist_free(client_options);
	}
}