summaryrefslogtreecommitdiffstats
path: root/mtp/MtpServer.cpp
blob: f99554b03698b20bc6377e818d1aafaa5b2405a6 (plain) (blame)
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
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *	  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Copyright (C) 2014 TeamWin - bigbiff and Dees_Troy mtp database conversion to C++
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#include <dirent.h>
#include "../twcommon.h"
#include "../set_metadata.h"
#include <cutils/properties.h>

#include "MtpTypes.h"
#include "MtpDebug.h"
#include "MtpDatabase.h"
#include "MtpObjectInfo.h"
#include "MtpProperty.h"
#include "MtpServer.h"
#include "MtpStorage.h"
#include "MtpStringBuffer.h"

#include <linux/usb/f_mtp.h>

static const MtpOperationCode kSupportedOperationCodes[] = {
	MTP_OPERATION_GET_DEVICE_INFO,
	MTP_OPERATION_OPEN_SESSION,
	MTP_OPERATION_CLOSE_SESSION,
	MTP_OPERATION_GET_STORAGE_IDS,
	MTP_OPERATION_GET_STORAGE_INFO,
	MTP_OPERATION_GET_NUM_OBJECTS,
	MTP_OPERATION_GET_OBJECT_HANDLES,
	MTP_OPERATION_GET_OBJECT_INFO,
	MTP_OPERATION_GET_OBJECT,
	MTP_OPERATION_GET_THUMB,
	MTP_OPERATION_DELETE_OBJECT,
	MTP_OPERATION_SEND_OBJECT_INFO,
	MTP_OPERATION_SEND_OBJECT,
//	MTP_OPERATION_INITIATE_CAPTURE,
//	MTP_OPERATION_FORMAT_STORE,
//	MTP_OPERATION_RESET_DEVICE,
//	MTP_OPERATION_SELF_TEST,
//	MTP_OPERATION_SET_OBJECT_PROTECTION,
//	MTP_OPERATION_POWER_DOWN,
	MTP_OPERATION_GET_DEVICE_PROP_DESC,
	MTP_OPERATION_GET_DEVICE_PROP_VALUE,
	MTP_OPERATION_SET_DEVICE_PROP_VALUE,
	MTP_OPERATION_RESET_DEVICE_PROP_VALUE,
//	MTP_OPERATION_TERMINATE_OPEN_CAPTURE,
//	MTP_OPERATION_MOVE_OBJECT,
//	MTP_OPERATION_COPY_OBJECT,
	MTP_OPERATION_GET_PARTIAL_OBJECT,
//	MTP_OPERATION_INITIATE_OPEN_CAPTURE,
	MTP_OPERATION_GET_OBJECT_PROPS_SUPPORTED,
	MTP_OPERATION_GET_OBJECT_PROP_DESC,
	MTP_OPERATION_GET_OBJECT_PROP_VALUE,
	MTP_OPERATION_SET_OBJECT_PROP_VALUE,
	MTP_OPERATION_GET_OBJECT_PROP_LIST,
//	MTP_OPERATION_SET_OBJECT_PROP_LIST,
//	MTP_OPERATION_GET_INTERDEPENDENT_PROP_DESC,
//	MTP_OPERATION_SEND_OBJECT_PROP_LIST,
	MTP_OPERATION_GET_OBJECT_REFERENCES,
	MTP_OPERATION_SET_OBJECT_REFERENCES,
//	MTP_OPERATION_SKIP,
	// Android extension for direct file IO
	MTP_OPERATION_GET_PARTIAL_OBJECT_64,
	MTP_OPERATION_SEND_PARTIAL_OBJECT,
	MTP_OPERATION_TRUNCATE_OBJECT,
	MTP_OPERATION_BEGIN_EDIT_OBJECT,
	MTP_OPERATION_END_EDIT_OBJECT,
};

static const MtpEventCode kSupportedEventCodes[] = {
	MTP_EVENT_OBJECT_ADDED,
	MTP_EVENT_OBJECT_REMOVED,
	MTP_EVENT_STORE_ADDED,
	MTP_EVENT_STORE_REMOVED,
	MTP_EVENT_OBJECT_PROP_CHANGED,
};

MtpServer::MtpServer(int fd, MtpDatabase* database, bool ptp,
					int fileGroup, int filePerm, int directoryPerm)
	:	mFD(fd),
		mDatabase(database),
		mPtp(ptp),
		mFileGroup(fileGroup),
		mFilePermission(filePerm),
		mDirectoryPermission(directoryPerm),
		mSessionID(0),
		mSessionOpen(false),
		mSendObjectHandle(kInvalidObjectHandle),
		mSendObjectFormat(0),
		mSendObjectFileSize(0)
{
}

MtpServer::~MtpServer() {
}

void MtpServer::addStorage(MtpStorage* storage) {
	android::Mutex::Autolock autoLock(mMutex);
	MTPD("addStorage(): storage: %x\n", storage);
	if (getStorage(storage->getStorageID()) != NULL) {
		MTPE("MtpServer::addStorage Storage for storage ID %i already exists.\n", storage->getStorageID());
		return;
	}
	mDatabase->createDB(storage, storage->getStorageID());
	mStorages.push(storage);
	sendStoreAdded(storage->getStorageID());
}

void MtpServer::removeStorage(MtpStorage* storage) {
	android::Mutex::Autolock autoLock(mMutex);

	for (size_t i = 0; i < mStorages.size(); i++) {
		if (mStorages[i] == storage) {
			MTPD("MtpServer::removeStorage calling sendStoreRemoved\n");
			// First lock the mutex so that the inotify thread and main
			// thread do not do anything while we remove the storage
			// item, and to make sure we don't remove the item while an
			// operation is in progress
			mDatabase->lockMutex();
			// Grab the storage ID before we delete the item from the
			// database
			MtpStorageID storageID = storage->getStorageID();
			// Remove the item from the mStorages from the vector. At
			// this point the main thread will no longer be able to find
			// this storage item anymore.
			mStorages.removeAt(i);
			// Destroy the storage item, free up all the memory, kill
			// the inotify thread.
			mDatabase->destroyDB(storageID);
			// Tell the host OS that the storage item is gone.
			sendStoreRemoved(storageID);
			// Unlock any remaining mutexes on other storage devices.
			// If no storage devices exist anymore this will do nothing.
			mDatabase->unlockMutex();
			break;
		}
	}
	MTPD("MtpServer::removeStorage DONE\n");
}

MtpStorage* MtpServer::getStorage(MtpStorageID id) {
	MTPD("getStorage\n");
	if (id == 0) {
		MTPD("mStorages\n");
		return mStorages[0];
	}
	for (size_t i = 0; i < mStorages.size(); i++) {
		MtpStorage* storage = mStorages[i];
		MTPD("id: %d\n", id);
		MTPD("storage: %d\n", storage->getStorageID());
		if (storage->getStorageID() == id) {
			return storage;
		}
	}
	return NULL;
}

bool MtpServer::hasStorage(MtpStorageID id) {
	MTPD("in hasStorage\n");
	if (id == 0 || id == 0xFFFFFFFF)
		return mStorages.size() > 0;
	return (getStorage(id) != NULL);
}

void MtpServer::run() {
	int fd = mFD;

	MTPI("MtpServer::run fd: %d\n", fd);

	while (1) {
		MTPD("About to read device...\n");
		int ret = mRequest.read(fd);
		if (ret < 0) {
			MTPD("request read returned %d, errno: %d", ret, errno);
			if (errno == ECANCELED) {
				// return to top of loop and wait for next command
				continue;
			}
			break;
		}
		MtpOperationCode operation = mRequest.getOperationCode();
		MtpTransactionID transaction = mRequest.getTransactionID();

		MTPD("operation: %s", MtpDebug::getOperationCodeName(operation));
		mRequest.dump();

		// FIXME need to generalize this
		bool dataIn = (operation == MTP_OPERATION_SEND_OBJECT_INFO
					|| operation == MTP_OPERATION_SET_OBJECT_REFERENCES
					|| operation == MTP_OPERATION_SET_OBJECT_PROP_VALUE
					|| operation == MTP_OPERATION_SET_DEVICE_PROP_VALUE);
		if (dataIn) {
			int ret = mData.read(fd);
			if (ret < 0) {
				MTPD("data read returned %d, errno: %d", ret, errno);
				if (errno == ECANCELED) {
					// return to top of loop and wait for next command
					continue;
				}
				break;
			}
			MTPD("received data:");
			mData.dump();
		} else {
			mData.reset();
		}

		if (handleRequest()) {
			if (!dataIn && mData.hasData()) {
				mData.setOperationCode(operation);
				mData.setTransactionID(transaction);
				MTPD("sending data:");
				mData.dump();
				ret = mData.write(fd);
				if (ret < 0) {
					MTPD("request write returned %d, errno: %d", ret, errno);
					if (errno == ECANCELED) {
						// return to top of loop and wait for next command
						continue;
					}
					break;
				}
			}

			mResponse.setTransactionID(transaction);
			MTPD("sending response %04X\n", mResponse.getResponseCode());
			ret = mResponse.write(fd);
			MTPD("ret: %d\n", ret);
			mResponse.dump();
			if (ret < 0) {
				MTPD("request write returned %d, errno: %d", ret, errno);
				if (errno == ECANCELED) {
					// return to top of loop and wait for next command
					continue;
				}
				break;
			}
		} else {
			MTPD("skipping response\n");
		}
	}

	// commit any open edits
	int count = mObjectEditList.size();
	for (int i = 0; i < count; i++) {
		ObjectEdit* edit = mObjectEditList[i];
		commitEdit(edit);
		delete edit;
	}
	mObjectEditList.clear();

	if (mSessionOpen)
		mDatabase->sessionEnded();
	close(fd);
	mFD = -1;
}

void MtpServer::sendObjectAdded(MtpObjectHandle handle) {
	MTPD("sendObjectAdded %d\n", handle);
	sendEvent(MTP_EVENT_OBJECT_ADDED, handle);
}

void MtpServer::sendObjectRemoved(MtpObjectHandle handle) {
	MTPD("sendObjectRemoved %d\n", handle);
	sendEvent(MTP_EVENT_OBJECT_REMOVED, handle);
}

void MtpServer::sendObjectUpdated(MtpObjectHandle handle) {
	MTPD("sendObjectUpdated %d\n", handle);
	sendEvent(MTP_EVENT_OBJECT_PROP_CHANGED, handle);
}

void MtpServer::sendStoreAdded(MtpStorageID id) {
	MTPD("sendStoreAdded %08X\n", id);
	sendEvent(MTP_EVENT_STORE_ADDED, id);
}

void MtpServer::sendStoreRemoved(MtpStorageID id) {
	MTPD("sendStoreRemoved %08X\n", id);
	sendEvent(MTP_EVENT_STORE_REMOVED, id);
	MTPD("MtpServer::sendStoreRemoved done\n");
}

void MtpServer::sendEvent(MtpEventCode code, uint32_t param1) {
	MTPD("MtpServer::sendEvent sending event code: %x\n", code);
	if (mSessionOpen) {
		mEvent.setEventCode(code);
		mEvent.setTransactionID(mRequest.getTransactionID());
		mEvent.setParameter(1, param1);
		int ret = mEvent.write(mFD);
		MTPD("mEvent.write returned %d\n", ret);
	}
}

void MtpServer::addEditObject(MtpObjectHandle handle, MtpString& path,
		uint64_t size, MtpObjectFormat format, int fd) {
	ObjectEdit*  edit = new ObjectEdit(handle, path, size, format, fd);
	mObjectEditList.add(edit);
}

MtpServer::ObjectEdit* MtpServer::getEditObject(MtpObjectHandle handle) {
	int count = mObjectEditList.size();
	for (int i = 0; i < count; i++) {
		ObjectEdit* edit = mObjectEditList[i];
		if (edit->mHandle == handle) return edit;
	}
	return NULL;
}

void MtpServer::removeEditObject(MtpObjectHandle handle) {
	int count = mObjectEditList.size();
	for (int i = 0; i < count; i++) {
		ObjectEdit* edit = mObjectEditList[i];
		if (edit->mHandle == handle) {
			delete edit;
			mObjectEditList.removeAt(i);
			return;
		}
	}
	MTPE("ObjectEdit not found in removeEditObject");
}

void MtpServer::commitEdit(ObjectEdit* edit) {
	mDatabase->endSendObject((const char *)edit->mPath, edit->mHandle, edit->mFormat, true);
}


bool MtpServer::handleRequest() {
	android::Mutex::Autolock autoLock(mMutex);

	MtpOperationCode operation = mRequest.getOperationCode();
	MtpResponseCode response;

	mResponse.reset();

	if (mSendObjectHandle != kInvalidObjectHandle && operation != MTP_OPERATION_SEND_OBJECT) {
		// FIXME - need to delete mSendObjectHandle from the database
		MTPE("expected SendObject after SendObjectInfo");
		mSendObjectHandle = kInvalidObjectHandle;
	}

	switch (operation) {
		case MTP_OPERATION_GET_DEVICE_INFO:
				MTPD("doGetDeviceInfo()\n");
				response = doGetDeviceInfo();
				break;
			case MTP_OPERATION_OPEN_SESSION:
				MTPD("doOpenSesion()\n");
				response = doOpenSession();
				break;
			case MTP_OPERATION_CLOSE_SESSION:
				MTPD("doCloseSession()\n");
				response = doCloseSession();
				break;
			case MTP_OPERATION_GET_STORAGE_IDS:
				MTPD("doGetStorageIDs()\n");
				response = doGetStorageIDs();
				break;
		 	 case MTP_OPERATION_GET_STORAGE_INFO:
				MTPD("about to call doGetStorageInfo()\n");
				response = doGetStorageInfo();
				break;
			case MTP_OPERATION_GET_OBJECT_PROPS_SUPPORTED:
				MTPD("about to call doGetObjectPropsSupported()\n");
				response = doGetObjectPropsSupported();
				break;
			case MTP_OPERATION_GET_OBJECT_HANDLES:
				MTPD("about to call doGetObjectHandles()\n");
				response = doGetObjectHandles();
				break;
			case MTP_OPERATION_GET_NUM_OBJECTS:
				MTPD("about to call doGetNumbObjects()\n");
				response = doGetNumObjects();
				break;
			case MTP_OPERATION_GET_OBJECT_REFERENCES:
				MTPD("about to call doGetObjectReferences()\n");
				response = doGetObjectReferences();
				break;
			case MTP_OPERATION_SET_OBJECT_REFERENCES:
				MTPD("about to call doSetObjectReferences()\n");
				response = doSetObjectReferences();
				break;
			case MTP_OPERATION_GET_OBJECT_PROP_VALUE:
				MTPD("about to call doGetObjectPropValue()\n");
				response = doGetObjectPropValue();
				break;
			case MTP_OPERATION_SET_OBJECT_PROP_VALUE:
				MTPD("about to call doSetObjectPropValue()\n");
				response = doSetObjectPropValue();
				break;
			case MTP_OPERATION_GET_DEVICE_PROP_VALUE:
				MTPD("about to call doGetDevicPropValue()\n");
				response = doGetDevicePropValue();
				break;
			case MTP_OPERATION_SET_DEVICE_PROP_VALUE:
				MTPD("about to call doSetDevicePropVaue()\n");
				response = doSetDevicePropValue();
				break;
			case MTP_OPERATION_RESET_DEVICE_PROP_VALUE:
				MTPD("about to call doResetDevicePropValue()\n");
				response = doResetDevicePropValue();
				break;
			case MTP_OPERATION_GET_OBJECT_PROP_LIST:
				MTPD("calling doGetObjectPropList()\n");
				response = doGetObjectPropList();
				break;
			case MTP_OPERATION_GET_OBJECT_INFO:
				MTPD("calling doGetObjectInfo()\n");
				response = doGetObjectInfo();
				break;
			case MTP_OPERATION_GET_OBJECT:
				MTPD("about to call doGetObject()\n");
				response = doGetObject();
				break;
			case MTP_OPERATION_GET_THUMB:
				response = doGetThumb();
				break;
			case MTP_OPERATION_GET_PARTIAL_OBJECT:
			case MTP_OPERATION_GET_PARTIAL_OBJECT_64:
				response = doGetPartialObject(operation);
				break;
			case MTP_OPERATION_SEND_OBJECT_INFO:
				MTPD("about to call doSendObjectInfo()\n");
				response = doSendObjectInfo();
				break;
			case MTP_OPERATION_SEND_OBJECT:
				MTPD("about to call doSendObject()\n");
				response = doSendObject();
				break;
			case MTP_OPERATION_DELETE_OBJECT:
				response = doDeleteObject();
				break;
			case MTP_OPERATION_GET_OBJECT_PROP_DESC:
				MTPD("about to call doGetObjectPropDesc()\n");
				response = doGetObjectPropDesc();
				break;
			case MTP_OPERATION_GET_DEVICE_PROP_DESC:
				MTPD("about to call doGetDevicePropDesc()\n");
				response = doGetDevicePropDesc();
				break;
			case MTP_OPERATION_SEND_PARTIAL_OBJECT:
				response = doSendPartialObject();
				break;
			case MTP_OPERATION_TRUNCATE_OBJECT:
				response = doTruncateObject();
				break;
			case MTP_OPERATION_BEGIN_EDIT_OBJECT:
				response = doBeginEditObject();
				break;
			case MTP_OPERATION_END_EDIT_OBJECT:
				response = doEndEditObject();
				break;
			default:
				MTPE("got unsupported command %s", MtpDebug::getOperationCodeName(operation));
				response = MTP_RESPONSE_OPERATION_NOT_SUPPORTED;
				break;
		}

		if (response == MTP_RESPONSE_TRANSACTION_CANCELLED)
			return false;
		mResponse.setResponseCode(response);
		return true;
}

MtpResponseCode MtpServer::doGetDeviceInfo() {
	MtpStringBuffer   string;
	char prop_value[PROPERTY_VALUE_MAX];

	MtpObjectFormatList* playbackFormats = mDatabase->getSupportedPlaybackFormats();
	MtpObjectFormatList* captureFormats = mDatabase->getSupportedCaptureFormats();
	MtpDevicePropertyList* deviceProperties = mDatabase->getSupportedDeviceProperties();

	// fill in device info
	mData.putUInt16(MTP_STANDARD_VERSION);
	if (mPtp) {
		MTPD("doGetDeviceInfo putting 0\n");
		mData.putUInt32(0);
	} else {
		// MTP Vendor Extension ID
		MTPD("doGetDeviceInfo putting 6\n");
		mData.putUInt32(6);
	}
	mData.putUInt16(MTP_STANDARD_VERSION);
	if (mPtp) {
		// no extensions
		MTPD("doGetDeviceInfo no extensions\n");
		string.set("");
	} else {
		// MTP extensions
		MTPD("doGetDeviceInfo microsoft.com: 1.0; android.com: 1.0;\n");
		string.set("microsoft.com: 1.0; android.com: 1.0;");
	}
	mData.putString(string); // MTP Extensions
	mData.putUInt16(0); //Functional Mode
	MTPD("doGetDeviceInfo opcodes, %i\n", sizeof(kSupportedOperationCodes) / sizeof(uint16_t));
	MTPD("doGetDeviceInfo eventcodes, %i\n", sizeof(kSupportedEventCodes) / sizeof(uint16_t));
	mData.putAUInt16(kSupportedOperationCodes,
			sizeof(kSupportedOperationCodes) / sizeof(uint16_t)); // Operations Supported
	mData.putAUInt16(kSupportedEventCodes,
			sizeof(kSupportedEventCodes) / sizeof(uint16_t)); // Events Supported
	mData.putAUInt16(deviceProperties); // Device Properties Supported
	mData.putAUInt16(captureFormats); // Capture Formats
	mData.putAUInt16(playbackFormats);  // Playback Formats

	property_get("ro.product.manufacturer", prop_value, "unknown manufacturer");
	MTPD("prop: %s\n", prop_value);
	string.set(prop_value);
	mData.putString(string);   // Manufacturer

	property_get("ro.product.model", prop_value, "MTP Device");
	string.set(prop_value);
	mData.putString(string);   // Model
	string.set("1.0");
	mData.putString(string);   // Device Version

	property_get("ro.serialno", prop_value, "????????");
	MTPD("sn: %s\n", prop_value);
	string.set(prop_value);
	mData.putString(string);   // Serial Number

	delete playbackFormats;
	delete captureFormats;
	delete deviceProperties;

	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doOpenSession() {
	if (mSessionOpen) {
		mResponse.setParameter(1, mSessionID);
		return MTP_RESPONSE_SESSION_ALREADY_OPEN;
	}
	mSessionID = mRequest.getParameter(1);
	mSessionOpen = true;

	mDatabase->sessionStarted();

	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doCloseSession() {
	if (!mSessionOpen)
		return MTP_RESPONSE_SESSION_NOT_OPEN;
	mSessionID = 0;
	mSessionOpen = false;
	mDatabase->sessionEnded();
	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doGetStorageIDs() {
	MTPD("doGetStorageIDs()\n");
	if (!mSessionOpen)
		return MTP_RESPONSE_SESSION_NOT_OPEN;
	int count = mStorages.size();
	mData.putUInt32(count);
	for (int i = 0; i < count; i++) {
		MTPD("getting storageid %d\n", mStorages[i]->getStorageID());
		mData.putUInt32(mStorages[i]->getStorageID());
	}

	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doGetStorageInfo() {
	MtpStringBuffer   string;
	MTPD("doGetStorageInfo()\n");
	if (!mSessionOpen)
		return MTP_RESPONSE_SESSION_NOT_OPEN;
	MtpStorageID id = mRequest.getParameter(1);
	MtpStorage* storage = getStorage(id);
	if (!storage) {
		MTPE("invalid storage id\n");
		return MTP_RESPONSE_INVALID_STORAGE_ID;
	}

	mData.putUInt16(storage->getType());
	mData.putUInt16(storage->getFileSystemType());
	mData.putUInt16(storage->getAccessCapability());
	mData.putUInt64(storage->getMaxCapacity());
	mData.putUInt64(storage->getFreeSpace());
	mData.putUInt32(1024*1024*1024); // Free Space in Objects
	string.set(storage->getDescription());
	mData.putString(string);
	mData.putEmptyString();   // Volume Identifier

	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doGetObjectPropsSupported() {
	MTPD("doGetObjectPropsSupported()\n");
	if (!mSessionOpen)
		return MTP_RESPONSE_SESSION_NOT_OPEN;
	MtpObjectFormat format = mRequest.getParameter(1);
	mDatabase->lockMutex();
	MtpObjectPropertyList* properties = mDatabase->getSupportedObjectProperties(format);
	mData.putAUInt16(properties);
	delete properties;
	mDatabase->unlockMutex();
	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doGetObjectHandles() {
	if (!mSessionOpen)
		return MTP_RESPONSE_SESSION_NOT_OPEN;
	MtpStorageID storageID = mRequest.getParameter(1);	  // 0xFFFFFFFF for all storage
	MtpObjectFormat format = mRequest.getParameter(2);	  // 0 for all formats
	MtpObjectHandle parent = mRequest.getParameter(3);	  // 0xFFFFFFFF for objects with no parent
															// 0x00000000 for all objects

	if (!hasStorage(storageID))
		return MTP_RESPONSE_INVALID_STORAGE_ID;

	MTPD("calling MtpDatabase->getObjectList()\n");
	mDatabase->lockMutex();
	MtpObjectHandleList* handles = mDatabase->getObjectList(storageID, format, parent);
	mData.putAUInt32(handles);
	delete handles;
	mDatabase->unlockMutex();
	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doGetNumObjects() {
	if (!mSessionOpen)
		return MTP_RESPONSE_SESSION_NOT_OPEN;
	MtpStorageID storageID = mRequest.getParameter(1);	  // 0xFFFFFFFF for all storage
	MtpObjectFormat format = mRequest.getParameter(2);	  // 0 for all formats
	MtpObjectHandle parent = mRequest.getParameter(3);	  // 0xFFFFFFFF for objects with no parent
															// 0x00000000 for all objects
	if (!hasStorage(storageID))
		return MTP_RESPONSE_INVALID_STORAGE_ID;

	mDatabase->lockMutex();
	int count = mDatabase->getNumObjects(storageID, format, parent);
	mDatabase->unlockMutex();
	if (count >= 0) {
		mResponse.setParameter(1, count);
		return MTP_RESPONSE_OK;
	} else {
		mResponse.setParameter(1, 0);
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
	}
}

MtpResponseCode MtpServer::doGetObjectReferences() {
	if (!mSessionOpen)
		return MTP_RESPONSE_SESSION_NOT_OPEN;
	if (!hasStorage())
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
	MtpObjectHandle handle = mRequest.getParameter(1);

	// FIXME - check for invalid object handle
	mDatabase->lockMutex();
	MtpObjectHandleList* handles = mDatabase->getObjectReferences(handle);
	if (handles) {
		mData.putAUInt32(handles);
		delete handles;
	} else {
		MTPD("MtpServer::doGetObjectReferences putEmptyArray\n");
		mData.putEmptyArray();
	}
	mDatabase->unlockMutex();
	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doSetObjectReferences() {
	if (!mSessionOpen)
		return MTP_RESPONSE_SESSION_NOT_OPEN;
	if (!hasStorage())
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
	MtpStorageID handle = mRequest.getParameter(1);

	MtpObjectHandleList* references = mData.getAUInt32();
	mDatabase->lockMutex();
	MtpResponseCode result = mDatabase->setObjectReferences(handle, references);
	mDatabase->unlockMutex();
	delete references;
	return result;
}

MtpResponseCode MtpServer::doGetObjectPropValue() {
	if (!hasStorage())
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
	MtpObjectHandle handle = mRequest.getParameter(1);
	MtpObjectProperty property = mRequest.getParameter(2);
	MTPD("GetObjectPropValue %d %s\n", handle,
			MtpDebug::getObjectPropCodeName(property));

	mDatabase->lockMutex();
	MtpResponseCode res = mDatabase->getObjectPropertyValue(handle, property, mData);
	mDatabase->unlockMutex();
	return res;
}

MtpResponseCode MtpServer::doSetObjectPropValue() {
	if (!hasStorage())
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
	MtpObjectHandle handle = mRequest.getParameter(1);
	MtpObjectProperty property = mRequest.getParameter(2);
	MTPD("SetObjectPropValue %d %s\n", handle,
			MtpDebug::getObjectPropCodeName(property));

	mDatabase->lockMutex();
	MtpResponseCode res = mDatabase->setObjectPropertyValue(handle, property, mData);
	mDatabase->unlockMutex();
	return res;
}

MtpResponseCode MtpServer::doGetDevicePropValue() {
	MtpDeviceProperty property = mRequest.getParameter(1);
	MTPD("GetDevicePropValue %s\n",
			MtpDebug::getDevicePropCodeName(property));

	mDatabase->lockMutex();
	MtpResponseCode res = mDatabase->getDevicePropertyValue(property, mData);
	mDatabase->unlockMutex();
	return res;
}

MtpResponseCode MtpServer::doSetDevicePropValue() {
	MtpDeviceProperty property = mRequest.getParameter(1);
	MTPD("SetDevicePropValue %s\n",
			MtpDebug::getDevicePropCodeName(property));

	mDatabase->lockMutex();
	MtpResponseCode res = mDatabase->setDevicePropertyValue(property, mData);
	mDatabase->unlockMutex();
	return res;
}

MtpResponseCode MtpServer::doResetDevicePropValue() {
	MtpDeviceProperty property = mRequest.getParameter(1);
	MTPD("ResetDevicePropValue %s\n",
			MtpDebug::getDevicePropCodeName(property));

	mDatabase->lockMutex();
	MtpResponseCode res = mDatabase->resetDeviceProperty(property);
	mDatabase->unlockMutex();
	return res;
}

MtpResponseCode MtpServer::doGetObjectPropList() {
	if (!hasStorage())
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;

	MtpObjectHandle handle = mRequest.getParameter(1);
	// use uint32_t so we can support 0xFFFFFFFF
	uint32_t format = mRequest.getParameter(2);
	uint32_t property = mRequest.getParameter(3);
	int groupCode = mRequest.getParameter(4);
	int depth = mRequest.getParameter(5);
	MTPD("GetObjectPropList %d format: %s property: %x group: %d depth: %d\n",
			handle, MtpDebug::getFormatCodeName(format),
			property, groupCode, depth);

	mDatabase->lockMutex();
	MtpResponseCode res = mDatabase->getObjectPropertyList(handle, format, property, groupCode, depth, mData);
	mDatabase->unlockMutex();
	return res;
}

MtpResponseCode MtpServer::doGetObjectInfo() {
	MTPD("inside doGetObjectInfo()\n");
	if (!hasStorage())
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
	MtpObjectHandle handle = mRequest.getParameter(1);
	MtpObjectInfo info(handle);
	MTPD("calling mtpdatabase getObjectInfo()\n");
	mDatabase->lockMutex();
	MtpResponseCode result = mDatabase->getObjectInfo(handle, info);
	mDatabase->unlockMutex();
	if (result == MTP_RESPONSE_OK) {
		char	date[20];

		mData.putUInt32(info.mStorageID);
		mData.putUInt16(info.mFormat);
		mData.putUInt16(info.mProtectionStatus);

		// if object is being edited the database size may be out of date
		uint32_t size = info.mCompressedSize;
		ObjectEdit* edit = getEditObject(handle);
		if (edit)
			size = (edit->mSize > 0xFFFFFFFFLL ? 0xFFFFFFFF : (uint32_t)edit->mSize);
		mData.putUInt32(size);

		mData.putUInt16(info.mThumbFormat);
		mData.putUInt32(info.mThumbCompressedSize);
		mData.putUInt32(info.mThumbPixWidth);
		mData.putUInt32(info.mThumbPixHeight);
		mData.putUInt32(info.mImagePixWidth);
		mData.putUInt32(info.mImagePixHeight);
		mData.putUInt32(info.mImagePixDepth);
		mData.putUInt32(info.mParent);
		mData.putUInt16(info.mAssociationType);
		mData.putUInt32(info.mAssociationDesc);
		mData.putUInt32(info.mSequenceNumber);
		MTPD("info.mName: %s\n", info.mName);
		mData.putString(info.mName);
		mData.putEmptyString();	// date created
		formatDateTime(info.mDateModified, date, sizeof(date));
		mData.putString(date);   // date modified
		mData.putEmptyString();   // keywords
	}
	return result;
}

MtpResponseCode MtpServer::doGetObject() {
	if (!hasStorage())
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
	MtpObjectHandle handle = mRequest.getParameter(1);
	MtpString pathBuf;
	int64_t fileLength;
	MtpObjectFormat format;
	MTPD("MtpServer::doGetObject calling getObjectFilePath\n");
	mDatabase->lockMutex();
	int result = mDatabase->getObjectFilePath(handle, pathBuf, fileLength, format);
	mDatabase->unlockMutex();
	if (result != MTP_RESPONSE_OK)
		return result;

	const char* filePath = (const char *)pathBuf;
	MTPD("filePath: %s\n", filePath);
	mtp_file_range  mfr;
	mfr.fd = open(filePath, O_RDONLY);
	if (mfr.fd < 0) {
		return MTP_RESPONSE_GENERAL_ERROR;
	}
	mfr.offset = 0;
	mfr.length = fileLength;
	MTPD("mfr.length: %lld\n", mfr.length);
	mfr.command = mRequest.getOperationCode();
	mfr.transaction_id = mRequest.getTransactionID();

	// then transfer the file
	int ret = ioctl(mFD, MTP_SEND_FILE_WITH_HEADER, (unsigned long)&mfr);
	MTPD("MTP_SEND_FILE_WITH_HEADER returned %d\n", ret);
	close(mfr.fd);
	if (ret < 0) {
		if (errno == ECANCELED)
			return MTP_RESPONSE_TRANSACTION_CANCELLED;
		else
			return MTP_RESPONSE_GENERAL_ERROR;
	}
	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doGetThumb() {
	MtpObjectHandle handle = mRequest.getParameter(1);
	size_t thumbSize;
	mDatabase->lockMutex();
	void* thumb = mDatabase->getThumbnail(handle, thumbSize);
	mDatabase->unlockMutex();
	if (thumb) {
		// send data
		mData.setOperationCode(mRequest.getOperationCode());
		mData.setTransactionID(mRequest.getTransactionID());
		mData.writeData(mFD, thumb, thumbSize);
		free(thumb);
		return MTP_RESPONSE_OK;
	} else {
		return MTP_RESPONSE_GENERAL_ERROR;
	}
}

MtpResponseCode MtpServer::doGetPartialObject(MtpOperationCode operation) {
	if (!hasStorage())
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
	MtpObjectHandle handle = mRequest.getParameter(1);
	uint64_t offset;
	uint32_t length;
	offset = mRequest.getParameter(2);
	if (operation == MTP_OPERATION_GET_PARTIAL_OBJECT_64) {
		// android extension with 64 bit offset
		uint64_t offset2 = mRequest.getParameter(3);
		offset = offset | (offset2 << 32);
		length = mRequest.getParameter(4);
	} else {
		// standard GetPartialObject
		length = mRequest.getParameter(3);
	}
	MtpString pathBuf;
	int64_t fileLength;
	MtpObjectFormat format;
	MTPD("MtpServer::doGetPartialObject calling getObjectFilePath\n");
	mDatabase->lockMutex();
	int result = mDatabase->getObjectFilePath(handle, pathBuf, fileLength, format);
	mDatabase->unlockMutex();
	if (result != MTP_RESPONSE_OK) {
		return result;
	}
	if (offset + length > (uint64_t)fileLength)
		length = fileLength - offset;

	const char* filePath = (const char *)pathBuf;
	mtp_file_range  mfr;
	mfr.fd = open(filePath, O_RDONLY);
	if (mfr.fd < 0) {
		return MTP_RESPONSE_GENERAL_ERROR;
	}
	mfr.offset = offset;
	mfr.length = length;
	mfr.command = mRequest.getOperationCode();
	mfr.transaction_id = mRequest.getTransactionID();
	mResponse.setParameter(1, length);

	// transfer the file
	int ret = ioctl(mFD, MTP_SEND_FILE_WITH_HEADER, (unsigned long)&mfr);
	MTPD("MTP_SEND_FILE_WITH_HEADER returned %d\n", ret);
	close(mfr.fd);
	if (ret < 0) {
		if (errno == ECANCELED)
			return MTP_RESPONSE_TRANSACTION_CANCELLED;
		else
			return MTP_RESPONSE_GENERAL_ERROR;
	}
	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doSendObjectInfo() {
	MTPD("MtpServer::doSendObjectInfo starting\n");
	MtpString path;
	MtpStorageID storageID = mRequest.getParameter(1);
	MtpStorage* storage = getStorage(storageID);
	MtpObjectHandle parent = mRequest.getParameter(2);
	if (!storage)
		return MTP_RESPONSE_INVALID_STORAGE_ID;

	// special case the root
	if (parent == MTP_PARENT_ROOT) {
		MTPD("MtpServer::doSendObjectInfo special case root\n");
		path = storage->getPath();
		parent = 0;
	} else {
		int64_t length;
		MtpObjectFormat format;
		MTPD("MtpServer::doSendObjectInfo calling getObjectFilePath\n");
		mDatabase->lockMutex();
		int result = mDatabase->getObjectFilePath(parent, path, length, format);
		mDatabase->unlockMutex();
		if (result != MTP_RESPONSE_OK) {
			return result;
		}
		if (format != MTP_FORMAT_ASSOCIATION)
			return MTP_RESPONSE_INVALID_PARENT_OBJECT;
	}

	// read only the fields we need
	mData.getUInt32();  // storage ID
	MtpObjectFormat format = mData.getUInt16();
	mData.getUInt16();  // protection status
	mSendObjectFileSize = mData.getUInt32();
	mData.getUInt16();  // thumb format
	mData.getUInt32();  // thumb compressed size
	mData.getUInt32();  // thumb pix width
	mData.getUInt32();  // thumb pix height
	mData.getUInt32();  // image pix width
	mData.getUInt32();  // image pix height
	mData.getUInt32();  // image bit depth
	mData.getUInt32();  // parent
	uint16_t associationType = mData.getUInt16();
	uint32_t associationDesc = mData.getUInt32();   // association desc
	mData.getUInt32();  // sequence number
	MtpStringBuffer name, created, modified;
	mData.getString(name);	// file name
	mData.getString(created);	  // date created
	mData.getString(modified);	 // date modified
	// keywords follow

	MTPD("name: %s format: %04X\n", (const char *)name, format);
	time_t modifiedTime;
	if (!parseDateTime(modified, modifiedTime)) {
		modifiedTime = 0;
	}
	if (path[path.size() - 1] != '/') {
		path += "/";
	}
	path += (const char *)name;

	// check space first
	if (mSendObjectFileSize > storage->getFreeSpace())
		return MTP_RESPONSE_STORAGE_FULL;
	uint64_t maxFileSize = storage->getMaxFileSize();
	// check storage max file size
	if (maxFileSize != 0) {
		// if mSendObjectFileSize is 0xFFFFFFFF, then all we know is the file size
		// is >= 0xFFFFFFFF
		if (mSendObjectFileSize > maxFileSize || mSendObjectFileSize == 0xFFFFFFFF)
			return MTP_RESPONSE_OBJECT_TOO_LARGE;
	}

	MTPD("MtpServer::doSendObjectInfo path: %s parent: %d storageID: %08X\n", (const char*)path, parent, storageID);
	mDatabase->lockMutex();
	MtpObjectHandle handle = mDatabase->beginSendObject((const char*)path,
			format, parent, storageID, mSendObjectFileSize, modifiedTime);
	mDatabase->unlockMutex();
	if (handle == kInvalidObjectHandle) {
		MTPE("MtpServer::doSendObjectInfo returning MTP_RESPONSE_GENERAL_ERROR, handle == kInvalidObjectHandle\n");
		return MTP_RESPONSE_GENERAL_ERROR;
	}

  if (format == MTP_FORMAT_ASSOCIATION) {
		mode_t mask = umask(0);
		MTPD("MtpServer::doSendObjectInfo mkdir '%s'\n", (const char *)path);
		int ret = mkdir((const char *)path, mDirectoryPermission);
		umask(mask);
		if (ret && ret != -EEXIST) {
			MTPE("MtpServer::doSendObjectInfo returning MTP_RESPONSE_GENERAL_ERROR, ret && ret != -EEXIST\n");
			return MTP_RESPONSE_GENERAL_ERROR;
		}
		chown((const char *)path, getuid(), mFileGroup);
		tw_set_default_metadata((const char *)path);

		// SendObject does not get sent for directories, so call endSendObject here instead
		mDatabase->lockMutex();
		mDatabase->endSendObject(path, handle, MTP_FORMAT_ASSOCIATION, MTP_RESPONSE_OK);
		mDatabase->unlockMutex();
	} else {
		mSendObjectFilePath = path;
		// save the handle for the SendObject call, which should follow
		mSendObjectHandle = handle;
		mSendObjectFormat = format;
	}

	mResponse.setParameter(1, storageID);
	mResponse.setParameter(2, parent);
	mResponse.setParameter(3, handle);
	MTPD("MtpServer::doSendObjectInfo returning MTP_RESPONSE_OK\n");
	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doSendObject() {
	if (!hasStorage())
		return MTP_RESPONSE_GENERAL_ERROR;
	MtpResponseCode result = MTP_RESPONSE_OK;
	mode_t mask;
	int ret = 0, initialData;

	if (mSendObjectHandle == kInvalidObjectHandle) {
		MTPE("Expected SendObjectInfo before SendObject");
		result = MTP_RESPONSE_NO_VALID_OBJECT_INFO;
		goto done;
	}

	// read the header, and possibly some data
	ret = mData.read(mFD);
	if (ret < MTP_CONTAINER_HEADER_SIZE) {
		MTPE("MTP_RESPONSE_GENERAL_ERROR\n");
		result = MTP_RESPONSE_GENERAL_ERROR;
		goto done;
	}
	initialData = ret - MTP_CONTAINER_HEADER_SIZE;

	mtp_file_range  mfr;
	mfr.fd = open(mSendObjectFilePath, O_RDWR | O_CREAT | O_TRUNC, 0640);
	if (mfr.fd < 0) {
		result = MTP_RESPONSE_GENERAL_ERROR;
		MTPE("fd error\n");
		goto done;
	}
	fchown(mfr.fd, getuid(), mFileGroup);
	// set permissions
	mask = umask(0);
	fchmod(mfr.fd, mFilePermission);
	umask(mask);

	if (initialData > 0)
		ret = write(mfr.fd, mData.getData(), initialData);

	if (mSendObjectFileSize - initialData > 0) {
		mfr.offset = initialData;
		if (mSendObjectFileSize == 0xFFFFFFFF) {
			// tell driver to read until it receives a short packet
			mfr.length = 0xFFFFFFFF;
		} else {
			mfr.length = mSendObjectFileSize - initialData;
		}

		MTPD("receiving %s\n", (const char *)mSendObjectFilePath);
		// transfer the file
		ret = ioctl(mFD, MTP_RECEIVE_FILE, (unsigned long)&mfr);
	}
	close(mfr.fd);
	tw_set_default_metadata((const char *)mSendObjectFilePath);

	if (ret < 0) {
		unlink(mSendObjectFilePath);
		if (errno == ECANCELED)
			result = MTP_RESPONSE_TRANSACTION_CANCELLED;
		else {
		    	MTPD("errno: %d\n", errno);
			result = MTP_RESPONSE_GENERAL_ERROR;
		}
	}

done:
	// reset so we don't attempt to send the data back
	MTPD("MTP_RECEIVE_FILE returned %d\n", ret);
	mData.reset();
	mDatabase->lockMutex();
	mDatabase->endSendObject(mSendObjectFilePath, mSendObjectHandle, mSendObjectFormat,
			result == MTP_RESPONSE_OK);
	mDatabase->unlockMutex();
	mSendObjectHandle = kInvalidObjectHandle;
	MTPD("result: %d\n", result);
	mSendObjectFormat = 0;
	return result;
}

static void deleteRecursive(const char* path) {
	char pathbuf[PATH_MAX];
	size_t pathLength = strlen(path);
	if (pathLength >= sizeof(pathbuf) - 1) {
		MTPE("path too long: %s\n", path);
	}
	strcpy(pathbuf, path);
	if (pathbuf[pathLength - 1] != '/') {
		pathbuf[pathLength++] = '/';
	}
	char* fileSpot = pathbuf + pathLength;
	int pathRemaining = sizeof(pathbuf) - pathLength - 1;

	DIR* dir = opendir(path);
	if (!dir) {
		MTPE("opendir %s failed: %s", path, strerror(errno));
		return;
	}

	struct dirent* entry;
	while ((entry = readdir(dir))) {
		const char* name = entry->d_name;

		// ignore "." and ".."
		if (name[0] == '.' && (name[1] == 0 || (name[1] == '.' && name[2] == 0))) {
			continue;
		}

		int nameLength = strlen(name);
		if (nameLength > pathRemaining) {
			MTPE("path %s/%s too long\n", path, name);
			continue;
		}
		strcpy(fileSpot, name);

		int type = entry->d_type;
		struct stat st;
		if (lstat(pathbuf, &st)) {
			MTPE("Failed to lstat '%s'\n", pathbuf);
			continue;
		}
		if (st.st_mode & S_IFDIR) {
			deleteRecursive(pathbuf);
			rmdir(pathbuf);
		} else {
			unlink(pathbuf);
		}
	}
	closedir(dir);
}

static void deletePath(const char* path) {
	struct stat statbuf;
	if (stat(path, &statbuf) == 0) {
		if (S_ISDIR(statbuf.st_mode)) {
			deleteRecursive(path);
			rmdir(path);
		} else {
			unlink(path);
		}
	} else {
		MTPE("deletePath stat failed for %s: %s", path, strerror(errno));
	}
}

MtpResponseCode MtpServer::doDeleteObject() {
	if (!hasStorage())
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
	MtpObjectHandle handle = mRequest.getParameter(1);
	MtpObjectFormat format = mRequest.getParameter(2);
	// FIXME - support deleting all objects if handle is 0xFFFFFFFF
	// FIXME - implement deleting objects by format

	MtpString filePath;
	int64_t fileLength;
	MTPD("MtpServer::doDeleteObject calling getObjectFilePath\n");
	mDatabase->lockMutex();
	int result = mDatabase->getObjectFilePath(handle, filePath, fileLength, format);
	if (result == MTP_RESPONSE_OK) {
		MTPD("deleting %s", (const char *)filePath);
		result = mDatabase->deleteFile(handle);
		// Don't delete the actual files unless the database deletion is allowed
		if (result == MTP_RESPONSE_OK) {
			deletePath((const char *)filePath);
		}
	}
	mDatabase->unlockMutex();
	return result;
}

MtpResponseCode MtpServer::doGetObjectPropDesc() {
	MtpObjectProperty propCode = mRequest.getParameter(1);
	MtpObjectFormat format = mRequest.getParameter(2);
	MTPD("MtpServer::doGetObjectPropDesc %s %s\n", MtpDebug::getObjectPropCodeName(propCode),
										MtpDebug::getFormatCodeName(format));
	mDatabase->lockMutex();
	MtpProperty* property = mDatabase->getObjectPropertyDesc(propCode, format);
	mDatabase->unlockMutex();
	if (!property) {
		MTPE("MtpServer::doGetObjectPropDesc propery not supported\n");
		return MTP_RESPONSE_OBJECT_PROP_NOT_SUPPORTED;
	}
	property->write(mData);
	delete property;
	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doGetDevicePropDesc() {
	MtpDeviceProperty propCode = mRequest.getParameter(1);
	MTPD("GetDevicePropDesc %s\n", MtpDebug::getDevicePropCodeName(propCode));
	mDatabase->lockMutex();
	MtpProperty* property = mDatabase->getDevicePropertyDesc(propCode);
	mDatabase->unlockMutex();
	if (!property) {
		MTPE("MtpServer::doGetDevicePropDesc property not supported\n");
		return MTP_RESPONSE_DEVICE_PROP_NOT_SUPPORTED;
	}
	property->write(mData);
	delete property;
	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doSendPartialObject() {
	if (!hasStorage())
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
	MtpObjectHandle handle = mRequest.getParameter(1);
	uint64_t offset = mRequest.getParameter(2);
	uint64_t offset2 = mRequest.getParameter(3);
	offset = offset | (offset2 << 32);
	uint32_t length = mRequest.getParameter(4);

	ObjectEdit* edit = getEditObject(handle);
	if (!edit) {
		MTPE("object not open for edit in doSendPartialObject");
		return MTP_RESPONSE_GENERAL_ERROR;
	}

	// can't start writing past the end of the file
	if (offset > edit->mSize) {
		MTPE("writing past end of object, offset: %lld, edit->mSize: %lld", offset, edit->mSize);
		return MTP_RESPONSE_GENERAL_ERROR;
	}

	const char* filePath = (const char *)edit->mPath;
	MTPD("receiving partial %s %lld %lld\n", filePath, offset, length);

	// read the header, and possibly some data
	int ret = mData.read(mFD);
	if (ret < MTP_CONTAINER_HEADER_SIZE)
		return MTP_RESPONSE_GENERAL_ERROR;
	int initialData = ret - MTP_CONTAINER_HEADER_SIZE;

	if (initialData > 0) {
		ret = write(edit->mFD, mData.getData(), initialData);
		offset += initialData;
		length -= initialData;
	}

	if (length > 0) {
		mtp_file_range  mfr;
		mfr.fd = edit->mFD;
		mfr.offset = offset;
		mfr.length = length;

		// transfer the file
		ret = ioctl(mFD, MTP_RECEIVE_FILE, (unsigned long)&mfr);
		MTPD("MTP_RECEIVE_FILE returned %d", ret);
	}
	if (ret < 0) {
		mResponse.setParameter(1, 0);
		if (errno == ECANCELED)
			return MTP_RESPONSE_TRANSACTION_CANCELLED;
		else
			return MTP_RESPONSE_GENERAL_ERROR;
	}

	// reset so we don't attempt to send this back
	mData.reset();
	mResponse.setParameter(1, length);
	uint64_t end = offset + length;
	if (end > edit->mSize) {
		edit->mSize = end;
	}
	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doTruncateObject() {
	MtpObjectHandle handle = mRequest.getParameter(1);
	ObjectEdit* edit = getEditObject(handle);
	if (!edit) {
		MTPE("object not open for edit in doTruncateObject");
		return MTP_RESPONSE_GENERAL_ERROR;
	}

	uint64_t offset = mRequest.getParameter(2);
	uint64_t offset2 = mRequest.getParameter(3);
	offset |= (offset2 << 32);
	if (ftruncate(edit->mFD, offset) != 0) {
		return MTP_RESPONSE_GENERAL_ERROR;
	} else {
		edit->mSize = offset;
		return MTP_RESPONSE_OK;
	}
}

MtpResponseCode MtpServer::doBeginEditObject() {
	MtpObjectHandle handle = mRequest.getParameter(1);
	if (getEditObject(handle)) {
		MTPE("object already open for edit in doBeginEditObject");
		return MTP_RESPONSE_GENERAL_ERROR;
	}

	MtpString path;
	int64_t fileLength;
	MtpObjectFormat format;
	MTPD("MtpServer::doBeginEditObject calling getObjectFilePath\n");
	mDatabase->lockMutex();
	int result = mDatabase->getObjectFilePath(handle, path, fileLength, format);
	mDatabase->unlockMutex();
	if (result != MTP_RESPONSE_OK)
		return result;

	int fd = open((const char *)path, O_RDWR | O_EXCL);
	if (fd < 0) {
		MTPE("open failed for %s in doBeginEditObject (%d)", (const char *)path, errno);
		return MTP_RESPONSE_GENERAL_ERROR;
	}

	addEditObject(handle, path, fileLength, format, fd);
	return MTP_RESPONSE_OK;
}

MtpResponseCode MtpServer::doEndEditObject() {
	MtpObjectHandle handle = mRequest.getParameter(1);
	ObjectEdit* edit = getEditObject(handle);
	if (!edit) {
		MTPE("object not open for edit in doEndEditObject");
		return MTP_RESPONSE_GENERAL_ERROR;
	}

	commitEdit(edit);
	removeEditObject(handle);
	return MTP_RESPONSE_OK;
}