summaryrefslogtreecommitdiffstats
path: root/libusbmuxd/libusbmuxd.c
blob: bb5f1f05fc807f4821aad873efc10fd971a57f59 (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
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
/*
	libusbmuxd - client library to talk to usbmuxd

Copyright (C) 2009-2010	Nikias Bassen <nikias@gmx.li>
Copyright (C) 2009	Paul Sladen <libiphone@paul.sladen.org>
Copyright (C) 2009	Martin Szulecki <opensuse@sukimashita.com>

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 General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

*/

#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#ifdef WIN32
#include <windows.h>
#include <winsock2.h>
#define sleep(x) Sleep(x*1000)
#define EPROTO 71
#define EBADMSG 77
#else
#include <sys/socket.h>
#include <arpa/inet.h>
#include <pthread.h>
#endif

#ifdef HAVE_INOTIFY
#include <sys/inotify.h>
#define EVENT_SIZE  (sizeof (struct inotify_event))
#define EVENT_BUF_LEN (1024 * (EVENT_SIZE + 16))
#define USBMUXD_DIRNAME "/var/run"
#define USBMUXD_SOCKET_NAME "usbmuxd"
#endif /* HAVE_INOTIFY */

#include <unistd.h>
#include <signal.h>

#ifdef HAVE_PLIST
#include <plist/plist.h>
#define PLIST_BUNDLE_ID "com.marcansoft.usbmuxd"
#define PLIST_CLIENT_VERSION_STRING "usbmuxd built for freedom"
#define PLIST_PROGNAME "libusbmuxd"
#endif

// usbmuxd public interface
#include "usbmuxd.h"
// usbmuxd protocol 
#include "usbmuxd-proto.h"
// socket utility functions
#include "sock_stuff.h"
// misc utility functions
#include "utils.h"

static struct collection devices;
static usbmuxd_event_cb_t event_cb = NULL;
#ifdef WIN32
HANDLE devmon = NULL;
#else
pthread_t devmon;
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
#endif
static int listenfd = -1;

static int use_tag = 0;
static int proto_version = 0;

/**
 * Finds a device info record by its handle.
 * if the record is not found, NULL is returned.
 */
static usbmuxd_device_info_t *devices_find(int handle)
{
	FOREACH(usbmuxd_device_info_t *dev, &devices) {
		if (dev && dev->handle == handle) {
			return dev;
		}
	} ENDFOREACH
	return NULL;
}

/**
 * Creates a socket connection to usbmuxd.
 * For Mac/Linux it is a unix domain socket,
 * for Windows it is a tcp socket.
 */
static int connect_usbmuxd_socket()
{
#if defined(WIN32) || defined(__CYGWIN__)
	return connect_socket("127.0.0.1", USBMUXD_SOCKET_PORT);
#else
	return connect_unix_socket(USBMUXD_SOCKET_FILE);
#endif
}

static int receive_packet(int sfd, struct usbmuxd_header *header, void **payload, int timeout)
{
	int recv_len;
	struct usbmuxd_header hdr;
	char *payload_loc = NULL;

	header->length = 0;
	header->version = 0;
	header->message = 0;
	header->tag = 0;

	recv_len = recv_buf_timeout(sfd, &hdr, sizeof(hdr), 0, timeout);
	if (recv_len < 0) {
		return recv_len;
	} else if (recv_len < sizeof(hdr)) {
		return recv_len;
	}

	uint32_t payload_size = hdr.length - sizeof(hdr);
	if (payload_size > 0) {
		payload_loc = (char*)malloc(payload_size);
		if (recv_buf_timeout(sfd, payload_loc, payload_size, 0, 5000) != payload_size) {
			fprintf(stderr, "%s: Error receiving payload of size %d\n", __func__, payload_size);
			free(payload_loc);
			return -EBADMSG;
		}
	}

#ifdef HAVE_PLIST
	if (hdr.message == MESSAGE_PLIST) {
		char *message = NULL;
		plist_t plist = NULL;
		plist_from_xml(payload_loc, payload_size, &plist);
		free(payload_loc);

		if (!plist) {
			fprintf(stderr, "%s: Error getting plist from payload!\n", __func__);
			return -EBADMSG;
		}

		plist_t node = plist_dict_get_item(plist, "MessageType");
		if (plist_get_node_type(node) != PLIST_STRING) {
			fprintf(stderr, "%s: Error getting message type from plist!\n", __func__);
			free(plist);
			return -EBADMSG;
		}
		
		plist_get_string_val(node, &message);
		if (message) {
			uint64_t val = 0;
			if (strcmp(message, "Result") == 0) {
				/* result message */
				uint32_t dwval = 0;
				plist_t n = plist_dict_get_item(plist, "Number");
				plist_get_uint_val(n, &val);
				*payload = malloc(sizeof(uint32_t));
				dwval = val;
				memcpy(*payload, &dwval, sizeof(dwval));
				hdr.length = sizeof(hdr) + sizeof(dwval);
				hdr.message = MESSAGE_RESULT;
			} else if (strcmp(message, "Attached") == 0) {
				/* device add message */
				struct usbmuxd_device_record *dev = NULL;
				plist_t props = plist_dict_get_item(plist, "Properties");
				if (!props) {
					fprintf(stderr, "%s: Could not get properties for message '%s' from plist!\n", __func__, message);
					plist_free(plist);
					return -EBADMSG;
				}
				dev = (struct usbmuxd_device_record*)malloc(sizeof(struct usbmuxd_device_record));
				memset(dev, 0, sizeof(struct usbmuxd_device_record));

				plist_t n = plist_dict_get_item(props, "DeviceID");
				plist_get_uint_val(n, &val);
				dev->device_id = (uint32_t)val;

				n = plist_dict_get_item(props, "ProductID");
				plist_get_uint_val(n, &val);
				dev->product_id = (uint32_t)val;

				n = plist_dict_get_item(props, "SerialNumber");
				char *strval = NULL;
				plist_get_string_val(n, &strval);
				if (strval) {
					strncpy(dev->serial_number, strval, 255);
					free(strval);
				}
				n = plist_dict_get_item(props, "LocationID");
				plist_get_uint_val(n, &val);
				dev->location = (uint32_t)val;
				*payload = (void*)dev;
				hdr.length = sizeof(hdr) + sizeof(struct usbmuxd_device_record);
				hdr.message = MESSAGE_DEVICE_ADD;
			} else if (strcmp(message, "Detached") == 0) {
				/* device remove message */
				uint32_t dwval = 0;
				plist_t n = plist_dict_get_item(plist, "DeviceID");
				if (n) {
					plist_get_uint_val(n, &val);
					*payload = malloc(sizeof(uint32_t));
					dwval = val;
					memcpy(*payload, &dwval, sizeof(dwval));
					hdr.length = sizeof(hdr) + sizeof(dwval);
					hdr.message = MESSAGE_DEVICE_REMOVE;
				}
			} else {
				fprintf(stderr, "%s: Unexpected message '%s' in plist!\n", __func__, message);
				plist_free(plist);
				return -EBADMSG;
			}
		}
		plist_free(plist);
	} else
#endif
	{
		*payload = payload_loc;
	}

	memcpy(header, &hdr, sizeof(hdr));

	return hdr.length;
}

/**
 * Retrieves the result code to a previously sent request.
 */
static int usbmuxd_get_result(int sfd, uint32_t tag, uint32_t * result)
{
	struct usbmuxd_header hdr;
	int recv_len;
	uint32_t *res = NULL;

	if (!result) {
		return -EINVAL;
	}
	*result = -1;

	if ((recv_len = receive_packet(sfd, &hdr, (void**)&res, 5000)) < 0) {
		fprintf(stderr, "%s: Error receiving packet: %d\n", __func__, errno);
		if (res)
			free(res);
		return -errno;
	}
	if (recv_len < sizeof(hdr)) {
		fprintf(stderr, "%s: Received packet is too small!\n", __func__);
		if (res)
			free(res);
		return -EPROTO;
	}

	if (hdr.message == MESSAGE_RESULT) {
		int ret = 0;
		if (res && (hdr.tag == tag)) {
			memcpy(result, res, sizeof(uint32_t));
			ret = 1;
		}
		if (res)
			free(res);
		return ret;
	}
	fprintf(stderr, "%s: Unexpected message of type %d received!\n", __func__, hdr.message);
	if (res)
		free(res);
	return -EPROTO;
}

static int send_packet(int sfd, uint32_t message, uint32_t tag, void *payload, uint32_t payload_size)
{
	struct usbmuxd_header header;

	header.length = sizeof(struct usbmuxd_header);
	header.version = proto_version;
	header.message = message;
	header.tag = tag;
	if (payload && (payload_size > 0)) {
		header.length += payload_size;
	}
	int sent = send_buf(sfd, &header, sizeof(header));
	if (sent != sizeof(header)) {
		fprintf(stderr, "%s: ERROR: could not send packet header\n", __func__);
		return -1;
	}
	if (payload && (payload_size > 0)) {
		sent += send_buf(sfd, payload, payload_size);
	}
	if (sent != (int)header.length) {
		fprintf(stderr, "%s: ERROR: could not send whole packet\n", __func__);
		close_socket(sfd);
		return -1;
	}
	return sent;
}

static int send_listen_packet(int sfd, uint32_t tag)
{
	int res = 0;
#ifdef HAVE_PLIST
	if (proto_version == 1) {
		/* plist packet */
		char *payload = NULL;
		uint32_t payload_size = 0;
		plist_t plist;

		/* construct message plist */
		plist = plist_new_dict();
		plist_dict_insert_item(plist, "BundleID", plist_new_string(PLIST_BUNDLE_ID));
		plist_dict_insert_item(plist, "ClientVersionString", plist_new_string(PLIST_CLIENT_VERSION_STRING));
		plist_dict_insert_item(plist, "MessageType", plist_new_string("Listen"));
		plist_dict_insert_item(plist, "ProgName", plist_new_string(PLIST_PROGNAME));
		plist_to_xml(plist, &payload, &payload_size);
		plist_free(plist);

		res = send_packet(sfd, MESSAGE_PLIST, tag, payload, payload_size);
		free(payload);
	} else
#endif
	{
		/* binary packet */
		res = send_packet(sfd, MESSAGE_LISTEN, tag, NULL, 0);
	}
	return res;
}

static int send_connect_packet(int sfd, uint32_t tag, uint32_t device_id, uint16_t port)
{
	int res = 0;
#ifdef HAVE_PLIST
	if (proto_version == 1) {
		/* plist packet */
		char *payload = NULL;
		uint32_t payload_size = 0;
		plist_t plist;

		/* construct message plist */
		plist = plist_new_dict();
		plist_dict_insert_item(plist, "BundleID", plist_new_string(PLIST_BUNDLE_ID));
		plist_dict_insert_item(plist, "ClientVersionString", plist_new_string(PLIST_CLIENT_VERSION_STRING));
		plist_dict_insert_item(plist, "MessageType", plist_new_string("Connect"));
		plist_dict_insert_item(plist, "DeviceID", plist_new_uint(device_id));
		plist_dict_insert_item(plist, "PortNumber", plist_new_uint(htons(port)));
		plist_dict_insert_item(plist, "ProgName", plist_new_string(PLIST_PROGNAME));
		plist_to_xml(plist, &payload, &payload_size);
		plist_free(plist);

		res = send_packet(sfd, MESSAGE_PLIST, tag, (void*)payload, payload_size);
		free(payload);
	} else
#endif
	{
		/* binary packet */
		struct {
			uint32_t device_id;
			uint16_t port;
			uint16_t reserved;
		} conninfo;

		conninfo.device_id = device_id;
		conninfo.port = htons(port);
		conninfo.reserved = 0;

		res = send_packet(sfd, MESSAGE_CONNECT, tag, &conninfo, sizeof(conninfo));
	}
	return res;
}

/**
 * Generates an event, i.e. calls the callback function.
 * A reference to a populated usbmuxd_event_t with information about the event
 * and the corresponding device will be passed to the callback function.
 */
static void generate_event(usbmuxd_event_cb_t callback, const usbmuxd_device_info_t *dev, enum usbmuxd_event_type event, void *user_data)
{
	usbmuxd_event_t ev;

	if (!callback || !dev) {
		return;
	}

	ev.event = event;
	memcpy(&ev.device, dev, sizeof(usbmuxd_device_info_t));

	callback(&ev, user_data);
}

static int usbmuxd_listen_poll()
{
	int sfd;

	sfd = connect_usbmuxd_socket();
	if (sfd < 0) {
		while (event_cb) {
			if ((sfd = connect_usbmuxd_socket()) > 0) {
				break;
			}
			sleep(1);
		}
	}

	return sfd;
}

#ifdef HAVE_INOTIFY
static int usbmuxd_listen_inotify()
{
	int inot_fd;
	int watch_d;
	int sfd;

	sfd = connect_usbmuxd_socket();
	if (sfd >= 0)
		return sfd;

	sfd = -1;
	inot_fd = inotify_init ();
	if (inot_fd < 0) {
		fprintf (stderr, "Failed to setup inotify\n");
		return -2;
	}

	/* inotify is setup, listen for events that concern us */
	watch_d = inotify_add_watch (inot_fd, USBMUXD_DIRNAME, IN_CREATE);
	if (watch_d < 0) {
		fprintf (stderr, "Failed to setup watch descriptor for socket dir\n");
		close (inot_fd);
		return -2;
	}

	while (1) {
		ssize_t len, i;
		char buff[EVENT_BUF_LEN] = {0};

		i = 0;
		len = read (inot_fd, buff, EVENT_BUF_LEN -1);
		if (len < 0)
			goto end;
		while (i < len) {
			struct inotify_event *pevent = (struct inotify_event *) & buff[i];

			/* check that it's ours */
			if (pevent->mask & IN_CREATE &&
			    pevent->len &&
			    pevent->name != NULL &&
			    strcmp(pevent->name, USBMUXD_SOCKET_NAME) == 0) {
				sfd = connect_usbmuxd_socket ();
				goto end;
			}
			i += EVENT_SIZE + pevent->len;
		}
	}

end:
	inotify_rm_watch(inot_fd, watch_d);
	close(inot_fd);

	return sfd;
}
#endif /* HAVE_INOTIFY */

/**
 * Tries to connect to usbmuxd and wait if it is not running.
 */
static int usbmuxd_listen()
{
	int sfd;
	uint32_t res = -1;

#ifdef HAVE_PLIST
retry:
#endif

#ifdef HAVE_INOTIFY
	sfd = usbmuxd_listen_inotify();
	if (sfd == -2)
		sfd = usbmuxd_listen_poll();
#else
	sfd = usbmuxd_listen_poll();
#endif

	if (sfd < 0) {
		fprintf(stderr, "%s: ERROR: usbmuxd was supposed to be running here...\n", __func__);
		return sfd;
	}

	use_tag++;
	if (send_listen_packet(sfd, use_tag) <= 0) {
		fprintf(stderr, "%s: ERROR: could not send listen packet\n", __func__);
		close_socket(sfd);
		return -1;
	}
	if (usbmuxd_get_result(sfd, use_tag, &res) && (res != 0)) {
		close_socket(sfd);
#ifdef HAVE_PLIST
		if ((res == RESULT_BADVERSION) && (proto_version != 1)) {
			proto_version = 1;
			goto retry;
		}
#endif
		fprintf(stderr, "%s: ERROR: did not get OK but %d\n", __func__, res);
		return -1;
	}

	return sfd;
}

/**
 * Waits for an event to occur, i.e. a packet coming from usbmuxd.
 * Calls generate_event to pass the event via callback to the client program.
 */
int get_next_event(int sfd, usbmuxd_event_cb_t callback, void *user_data)
{
	struct usbmuxd_header hdr;
	void *payload = NULL;

	/* block until we receive something */
	if (receive_packet(sfd, &hdr, &payload, 0) < 0) {
		// when then usbmuxd connection fails,
		// generate remove events for every device that
		// is still present so applications know about it
		FOREACH(usbmuxd_device_info_t *dev, &devices) {
			generate_event(callback, dev, UE_DEVICE_REMOVE, user_data);
			collection_remove(&devices, dev);
			free(dev);
		} ENDFOREACH
		return -EIO;
	}

	if ((hdr.length > sizeof(hdr)) && !payload) {
		fprintf(stderr, "%s: Invalid packet received, payload is missing!\n", __func__);
		return -EBADMSG;
	}

	if (hdr.message == MESSAGE_DEVICE_ADD) {
		struct usbmuxd_device_record *dev = payload;
		usbmuxd_device_info_t *devinfo = (usbmuxd_device_info_t*)malloc(sizeof(usbmuxd_device_info_t));
		if (!devinfo) {
			fprintf(stderr, "%s: Out of memory!\n", __func__);
			free(payload);
			return -1;
		}

		devinfo->handle = dev->device_id;
		devinfo->product_id = dev->product_id;
		memset(devinfo->udid, '\0', sizeof(devinfo->udid));
		memcpy(devinfo->udid, dev->serial_number, sizeof(devinfo->udid));

		if (strcasecmp(devinfo->udid, "ffffffffffffffffffffffffffffffffffffffff") == 0) {
			sprintf(devinfo->udid + 32, "%08x", devinfo->handle);
		}

		collection_add(&devices, devinfo);
		generate_event(callback, devinfo, UE_DEVICE_ADD, user_data);
	} else if (hdr.message == MESSAGE_DEVICE_REMOVE) {
		uint32_t handle;
		usbmuxd_device_info_t *devinfo;

		memcpy(&handle, payload, sizeof(uint32_t));

		devinfo = devices_find(handle);
		if (!devinfo) {
			fprintf(stderr, "%s: WARNING: got device remove message for handle %d, but couldn't find the corresponding handle in the device list. This event will be ignored.\n", __func__, handle);
		} else {
			generate_event(callback, devinfo, UE_DEVICE_REMOVE, user_data);
			collection_remove(&devices, devinfo);
			free(devinfo);
		}
	} else if (hdr.length > 0) {
		fprintf(stderr, "%s: Unexpected message type %d length %d received!\n", __func__, hdr.message, hdr.length);
	}
	if (payload) {
		free(payload);
	}
	return 0;
}

static void device_monitor_cleanup(void* data)
{
	collection_free(&devices);

	close_socket(listenfd);
	listenfd = -1;
}

/**
 * Device Monitor thread function.
 *
 * This function sets up a connection to usbmuxd
 */
static void *device_monitor(void *data)
{
	collection_init(&devices);

#ifndef WIN32
	pthread_cleanup_push(device_monitor_cleanup, NULL);
#endif
	while (event_cb) {

		listenfd = usbmuxd_listen();
		if (listenfd < 0) {
			continue;
		}

		while (event_cb) {
			int res = get_next_event(listenfd, event_cb, data);
			if (res < 0) {
			    break;
			}
		}
	}

#ifndef WIN32
	pthread_cleanup_pop(1);
#else
	device_monitor_cleanup(NULL);
#endif
	return NULL;
}

int usbmuxd_subscribe(usbmuxd_event_cb_t callback, void *user_data)
{
	int res;

	if (!callback) {
		return -EINVAL;
	}
	event_cb = callback;

#ifdef WIN32
	res = 0;
	devmon = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)device_monitor, user_data, 0, NULL);
	if (devmon == NULL) {
		res = GetLastError();
	}
#else
	res = pthread_create(&devmon, NULL, device_monitor, user_data);
#endif
	if (res != 0) {
		fprintf(stderr, "%s: ERROR: Could not start device watcher thread!\n", __func__);
		return res;
	}
	return 0;
}

int usbmuxd_unsubscribe()
{
	event_cb = NULL;

	shutdown_socket(listenfd, SHUT_RDWR);

#ifdef WIN32
	if (devmon != NULL) {
		WaitForSingleObject(devmon, INFINITE);
	}
#else
	if (pthread_kill(devmon, 0) == 0) {
		pthread_cancel(devmon);
		pthread_join(devmon, NULL);
	}
#endif

	return 0;
}

int usbmuxd_get_device_list(usbmuxd_device_info_t **device_list)
{
	int sfd;
	int listen_success = 0;
	uint32_t res;
	struct collection tmpdevs;
	usbmuxd_device_info_t *newlist = NULL;
	struct usbmuxd_header hdr;
	struct usbmuxd_device_record *dev;
	int dev_cnt = 0;
	void *payload = NULL;

	*device_list = NULL;

#ifdef HAVE_PLIST
retry:
#endif
	sfd = connect_usbmuxd_socket();
	if (sfd < 0) {
		fprintf(stderr, "%s: error opening socket!\n", __func__);
		return sfd;
	}

	use_tag++;
	if (send_listen_packet(sfd, use_tag) > 0) {
		res = -1;
		// get response
		if (usbmuxd_get_result(sfd, use_tag, &res) && (res == 0)) {
			listen_success = 1;
		} else {
			close_socket(sfd);
#ifdef HAVE_PLIST
			if ((res == RESULT_BADVERSION) && (proto_version != 1)) {
				proto_version = 1;
				goto retry;
			}
#endif
			fprintf(stderr,
					"%s: Did not get response to scan request (with result=0)...\n",
					__func__);
			return res;
		}
	}

	if (!listen_success) {
		fprintf(stderr, "%s: Could not send listen request!\n", __func__);
		return -1;
	}

	collection_init(&tmpdevs);

	// receive device list
	while (1) {
		if (receive_packet(sfd, &hdr, &payload, 1000) > 0) {
			if (hdr.message == MESSAGE_DEVICE_ADD) {
				dev = payload;
				usbmuxd_device_info_t *devinfo = (usbmuxd_device_info_t*)malloc(sizeof(usbmuxd_device_info_t));
				if (!devinfo) {
					fprintf(stderr, "%s: Out of memory!\n", __func__);
					free(payload);
					return -1;
				}

				devinfo->handle = dev->device_id;
				devinfo->product_id = dev->product_id;
				memset(devinfo->udid, '\0', sizeof(devinfo->udid));
				memcpy(devinfo->udid, dev->serial_number, sizeof(devinfo->udid));

				if (strcasecmp(devinfo->udid, "ffffffffffffffffffffffffffffffffffffffff") == 0) {
					sprintf(devinfo->udid + 32, "%08x", devinfo->handle);
				}

				collection_add(&tmpdevs, devinfo);

			} else if (hdr.message == MESSAGE_DEVICE_REMOVE) {
				uint32_t handle;
				usbmuxd_device_info_t *devinfo = NULL;

				memcpy(&handle, payload, sizeof(uint32_t));

				FOREACH(usbmuxd_device_info_t *di, &tmpdevs) {
					if (di && di->handle == handle) {
						devinfo = di;
						break;
					}
				} ENDFOREACH
				if (devinfo) {
					collection_remove(&tmpdevs, devinfo);
					free(devinfo);
				}
			} else {
				fprintf(stderr, "%s: Unexpected message %d\n", __func__, hdr.message);
			}
			if (payload)
				free(payload);
		} else {
			// we _should_ have all of them now.
			// or perhaps an error occured.
			break;
		}
	}

	// explicitly close connection
	close_socket(sfd);

	// create copy of device info entries from collection
	newlist = (usbmuxd_device_info_t*)malloc(sizeof(usbmuxd_device_info_t) * (collection_count(&tmpdevs) + 1));
	dev_cnt = 0;
	FOREACH(usbmuxd_device_info_t *di, &tmpdevs) {
		if (di) {
			memcpy(&newlist[dev_cnt], di, sizeof(usbmuxd_device_info_t));
			free(di);
			dev_cnt++;
		}
	} ENDFOREACH
	collection_free(&tmpdevs);

	memset(&newlist[dev_cnt], 0, sizeof(usbmuxd_device_info_t));
	*device_list = newlist;

	return dev_cnt;
}

int usbmuxd_device_list_free(usbmuxd_device_info_t **device_list)
{
	if (device_list) {
		free(*device_list);
	}
	return 0;
}

int usbmuxd_get_device_by_udid(const char *udid, usbmuxd_device_info_t *device)
{
	usbmuxd_device_info_t *dev_list = NULL;

	if (!device) {
		return -EINVAL;
	}
	if (usbmuxd_get_device_list(&dev_list) < 0) {
		return -ENODEV;
	}

	int i;
	int result = 0;
	for (i = 0; dev_list[i].handle > 0; i++) {
	 	if (!udid) {
			device->handle = dev_list[i].handle;
			device->product_id = dev_list[i].product_id;
			strcpy(device->udid, dev_list[i].udid);
			result = 1;
			break;
		}
		if (!strcmp(udid, dev_list[i].udid)) {
			device->handle = dev_list[i].handle;
			device->product_id = dev_list[i].product_id;
			strcpy(device->udid, dev_list[i].udid);
			result = 1;
			break;
		}
	}

	free(dev_list);

	return result;
}

int usbmuxd_connect(const int handle, const unsigned short port)
{
	int sfd;
	int connected = 0;
	uint32_t res = -1;

#ifdef HAVE_PLIST
retry:
#endif
	sfd = connect_usbmuxd_socket();
	if (sfd < 0) {
		fprintf(stderr, "%s: Error: Connection to usbmuxd failed: %s\n",
				__func__, strerror(errno));
		return sfd;
	}

	use_tag++;
	if (send_connect_packet(sfd, use_tag, (uint32_t)handle, (uint16_t)port) <= 0) {
		fprintf(stderr, "%s: Error sending connect message!\n", __func__);
	} else {
		// read ACK
		//fprintf(stderr, "%s: Reading connect result...\n", __func__);
		if (usbmuxd_get_result(sfd, use_tag, &res)) {
			if (res == 0) {
				//fprintf(stderr, "%s: Connect success!\n", __func__);
				connected = 1;
			} else {
#ifdef HAVE_PLIST
				if ((res == RESULT_BADVERSION) && (proto_version == 0)) {
					proto_version = 1;
					close_socket(sfd);
					goto retry;
				}
#endif
				fprintf(stderr, "%s: Connect failed, Error code=%d\n",
						__func__, res);
			}
		}
	}

	if (connected) {
		return sfd;
	}

	close_socket(sfd);

	return -1;
}

int usbmuxd_disconnect(int sfd)
{
	return close_socket(sfd);
}

int usbmuxd_send(int sfd, const char *data, uint32_t len, uint32_t *sent_bytes)
{
	int num_sent;

	if (sfd < 0) {
		return -EINVAL;
	}
	
	num_sent = send(sfd, (void*)data, len, 0);
	if (num_sent < 0) {
		*sent_bytes = 0;
		fprintf(stderr, "%s: Error %d when sending: %s\n", __func__, num_sent, strerror(errno));
		return num_sent;
	} else if ((uint32_t)num_sent < len) {
		fprintf(stderr, "%s: Warning: Did not send enough (only %d of %d)\n", __func__, num_sent, len);
	}

	*sent_bytes = num_sent;

	return 0;
}

int usbmuxd_recv_timeout(int sfd, char *data, uint32_t len, uint32_t *recv_bytes, unsigned int timeout)
{
	int num_recv = recv_buf_timeout(sfd, (void*)data, len, 0, timeout);
	if (num_recv < 0) {
		*recv_bytes = 0;
		return num_recv;
	}

	*recv_bytes = num_recv;

	return 0;
}

int usbmuxd_recv(int sfd, char *data, uint32_t len, uint32_t *recv_bytes)
{
	return usbmuxd_recv_timeout(sfd, data, len, recv_bytes, 5000);
}