summaryrefslogtreecommitdiffstats
path: root/adb/usb_windows.c
blob: 7ddaa0c185da56473b2ea451bf03f5ad5599729e (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
/*
 * Copyright (C) 2007 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.
 */

#include <windows.h>
#include <winerror.h>
#include <errno.h>
#include <usb100.h>
#include <adb_api.h>
#include <stdio.h>

#include "sysdeps.h"

#define   TRACE_TAG  TRACE_USB
#include "adb.h"

/** Structure usb_handle describes our connection to the usb device via
  AdbWinApi.dll. This structure is returned from usb_open() routine and
  is expected in each subsequent call that is accessing the device.
*/
struct usb_handle {
  /// Previous entry in the list of opened usb handles
  usb_handle *prev;

  /// Next entry in the list of opened usb handles
  usb_handle *next;

  /// Handle to USB interface
  ADBAPIHANDLE  adb_interface;

  /// Handle to USB read pipe (endpoint)
  ADBAPIHANDLE  adb_read_pipe;

  /// Handle to USB write pipe (endpoint)
  ADBAPIHANDLE  adb_write_pipe;

  /// Interface name
  char*         interface_name;

  /// Mask for determining when to use zero length packets
  unsigned zero_mask;
};

/// Class ID assigned to the device by androidusb.sys
static const GUID usb_class_id = ANDROID_USB_CLASS_ID;

/// List of opened usb handles
static usb_handle handle_list = {
  .prev = &handle_list,
  .next = &handle_list,
};

/// Locker for the list of opened usb handles
ADB_MUTEX_DEFINE( usb_lock );

/// Checks if there is opened usb handle in handle_list for this device.
int known_device(const char* dev_name);

/// Checks if there is opened usb handle in handle_list for this device.
/// usb_lock mutex must be held before calling this routine.
int known_device_locked(const char* dev_name);

/// Registers opened usb handle (adds it to handle_list).
int register_new_device(usb_handle* handle);

/// Checks if interface (device) matches certain criteria
int recognized_device(usb_handle* handle);

/// Enumerates present and available interfaces (devices), opens new ones and
/// registers usb transport for them.
void find_devices();

/// Entry point for thread that polls (every second) for new usb interfaces.
/// This routine calls find_devices in infinite loop.
void* device_poll_thread(void* unused);

/// Initializes this module
void usb_init();

/// Cleans up this module
void usb_cleanup();

/// Opens usb interface (device) by interface (device) name.
usb_handle* do_usb_open(const wchar_t* interface_name);

/// Writes data to the opened usb handle
int usb_write(usb_handle* handle, const void* data, int len);

/// Reads data using the opened usb handle
int usb_read(usb_handle *handle, void* data, int len);

/// Cleans up opened usb handle
void usb_cleanup_handle(usb_handle* handle);

/// Cleans up (but don't close) opened usb handle
void usb_kick(usb_handle* handle);

/// Closes opened usb handle
int usb_close(usb_handle* handle);

/// Gets interface (device) name for an opened usb handle
const char *usb_name(usb_handle* handle);

int known_device_locked(const char* dev_name) {
  usb_handle* usb;

  if (NULL != dev_name) {
    // Iterate through the list looking for the name match.
    for(usb = handle_list.next; usb != &handle_list; usb = usb->next) {
      // In Windows names are not case sensetive!
      if((NULL != usb->interface_name) &&
         (0 == stricmp(usb->interface_name, dev_name))) {
        return 1;
      }
    }
  }

  return 0;
}

int known_device(const char* dev_name) {
  int ret = 0;

  if (NULL != dev_name) {
    adb_mutex_lock(&usb_lock);
    ret = known_device_locked(dev_name);
    adb_mutex_unlock(&usb_lock);
  }

  return ret;
}

int register_new_device(usb_handle* handle) {
  if (NULL == handle)
    return 0;

  adb_mutex_lock(&usb_lock);

  // Check if device is already in the list
  if (known_device_locked(handle->interface_name)) {
    adb_mutex_unlock(&usb_lock);
    return 0;
  }

  // Not in the list. Add this handle to the list.
  handle->next = &handle_list;
  handle->prev = handle_list.prev;
  handle->prev->next = handle;
  handle->next->prev = handle;

  adb_mutex_unlock(&usb_lock);

  return 1;
}

void* device_poll_thread(void* unused) {
  D("Created device thread\n");

  while(1) {
    find_devices();
    adb_sleep_ms(1000);
  }

  return NULL;
}

void usb_init() {
  adb_thread_t tid;

  if(adb_thread_create(&tid, device_poll_thread, NULL)) {
    fatal_errno("cannot create input thread");
  }
}

void usb_cleanup() {
}

usb_handle* do_usb_open(const wchar_t* interface_name) {
  // Allocate our handle
  usb_handle* ret = (usb_handle*)malloc(sizeof(usb_handle));
  if (NULL == ret)
    return NULL;

  // Set linkers back to the handle
  ret->next = ret;
  ret->prev = ret;

  // Create interface.
  ret->adb_interface = AdbCreateInterfaceByName(interface_name);

  if (NULL == ret->adb_interface) {
    free(ret);
    errno = GetLastError();
    return NULL;
  }

  // Open read pipe (endpoint)
  ret->adb_read_pipe =
    AdbOpenDefaultBulkReadEndpoint(ret->adb_interface,
                                   AdbOpenAccessTypeReadWrite,
                                   AdbOpenSharingModeReadWrite);
  if (NULL != ret->adb_read_pipe) {
    // Open write pipe (endpoint)
    ret->adb_write_pipe =
      AdbOpenDefaultBulkWriteEndpoint(ret->adb_interface,
                                      AdbOpenAccessTypeReadWrite,
                                      AdbOpenSharingModeReadWrite);
    if (NULL != ret->adb_write_pipe) {
      // Save interface name
      unsigned long name_len = 0;

      // First get expected name length
      AdbGetInterfaceName(ret->adb_interface,
                          NULL,
                          &name_len,
                          true);
      if (0 != name_len) {
        ret->interface_name = (char*)malloc(name_len);

        if (NULL != ret->interface_name) {
          // Now save the name
          if (AdbGetInterfaceName(ret->adb_interface,
                                  ret->interface_name,
                                  &name_len,
                                  true)) {
            // We're done at this point
            return ret;
          }
        } else {
          SetLastError(ERROR_OUTOFMEMORY);
        }
      }
    }
  }

  // Something went wrong.
  errno = GetLastError();
  usb_cleanup_handle(ret);
  free(ret);
  SetLastError(errno);

  return NULL;
}

int usb_write(usb_handle* handle, const void* data, int len) {
  unsigned long time_out = 500 + len * 8;
  unsigned long written = 0;
  int ret;

  D("usb_write %d\n", len);
  if (NULL != handle) {
    // Perform write
    ret = AdbWriteEndpointSync(handle->adb_write_pipe,
                               (void*)data,
                               (unsigned long)len,
                               &written,
                               time_out);
    errno = GetLastError();

    if (ret) {
      // Make sure that we've written what we were asked to write
      D("usb_write got: %ld, expected: %d\n", written, len);
      if (written == (unsigned long)len) {
        if(handle->zero_mask && (len & handle->zero_mask) == 0) {
          // Send a zero length packet
          AdbWriteEndpointSync(handle->adb_write_pipe,
                               (void*)data,
                               0,
                               &written,
                               time_out);
        }
        return 0;
      }
    } else {
      // assume ERROR_INVALID_HANDLE indicates we are disconnected
      if (errno == ERROR_INVALID_HANDLE)
        usb_kick(handle);
    }
  } else {
    D("usb_write NULL handle\n");
    SetLastError(ERROR_INVALID_HANDLE);
  }

  D("usb_write failed: %d\n", errno);

  return -1;
}

int usb_read(usb_handle *handle, void* data, int len) {
  unsigned long time_out = 500 + len * 8;
  unsigned long read = 0;
  int ret;

  D("usb_read %d\n", len);
  if (NULL != handle) {
    while (len > 0) {
      int xfer = (len > 4096) ? 4096 : len;

      ret = AdbReadEndpointSync(handle->adb_read_pipe,
                                  (void*)data,
                                  (unsigned long)xfer,
                                  &read,
                                  time_out);
      errno = GetLastError();
      D("usb_write got: %ld, expected: %d, errno: %d\n", read, xfer, errno);
      if (ret) {
        data += read;
        len -= read;

        if (len == 0)
          return 0;
      } else if (errno != ERROR_SEM_TIMEOUT) {
        // assume ERROR_INVALID_HANDLE indicates we are disconnected
        if (errno == ERROR_INVALID_HANDLE)
          usb_kick(handle);
        break;
      }
    }
  } else {
    D("usb_read NULL handle\n");
    SetLastError(ERROR_INVALID_HANDLE);
  }

  D("usb_read failed: %d\n", errno);

  return -1;
}

void usb_cleanup_handle(usb_handle* handle) {
  if (NULL != handle) {
    if (NULL != handle->interface_name)
      free(handle->interface_name);
    if (NULL != handle->adb_write_pipe)
      AdbCloseHandle(handle->adb_write_pipe);
    if (NULL != handle->adb_read_pipe)
      AdbCloseHandle(handle->adb_read_pipe);
    if (NULL != handle->adb_interface)
      AdbCloseHandle(handle->adb_interface);

    handle->interface_name = NULL;
    handle->adb_write_pipe = NULL;
    handle->adb_read_pipe = NULL;
    handle->adb_interface = NULL;
  }
}

void usb_kick(usb_handle* handle) {
  if (NULL != handle) {
    adb_mutex_lock(&usb_lock);

    usb_cleanup_handle(handle);

    adb_mutex_unlock(&usb_lock);
  } else {
    SetLastError(ERROR_INVALID_HANDLE);
    errno = ERROR_INVALID_HANDLE;
  }
}

int usb_close(usb_handle* handle) {
  D("usb_close\n");

  if (NULL != handle) {
    // Remove handle from the list
    adb_mutex_lock(&usb_lock);

    if ((handle->next != handle) && (handle->prev != handle)) {
      handle->next->prev = handle->prev;
      handle->prev->next = handle->next;
      handle->prev = handle;
      handle->next = handle;
    }

    adb_mutex_unlock(&usb_lock);

    // Cleanup handle
    usb_cleanup_handle(handle);
    free(handle);
  }

  return 0;
}

const char *usb_name(usb_handle* handle) {
  if (NULL == handle) {
    SetLastError(ERROR_INVALID_HANDLE);
    errno = ERROR_INVALID_HANDLE;
    return NULL;
  }

  return (const char*)handle->interface_name;
}

int recognized_device(usb_handle* handle) {
  if (NULL == handle)
    return 0;

  // Check vendor and product id first
  USB_DEVICE_DESCRIPTOR device_desc;

  if (!AdbGetUsbDeviceDescriptor(handle->adb_interface,
                                 &device_desc)) {
    return 0;
  }

  // Then check interface properties
  USB_INTERFACE_DESCRIPTOR interf_desc;

  if (!AdbGetUsbInterfaceDescriptor(handle->adb_interface,
                                    &interf_desc)) {
    return 0;
  }

  // Must have two endpoints
  if (2 != interf_desc.bNumEndpoints) {
    return 0;
  }

  if (is_adb_interface(device_desc.idVendor, device_desc.idProduct,
      interf_desc.bInterfaceClass, interf_desc.bInterfaceSubClass, interf_desc.bInterfaceProtocol)) {

    if(interf_desc.bInterfaceProtocol == 0x01) {
      AdbEndpointInformation endpoint_info;
      // assuming zero is a valid bulk endpoint ID
      if (AdbGetEndpointInformation(handle->adb_interface, 0, &endpoint_info)) {
        handle->zero_mask = endpoint_info.max_packet_size - 1;
      }
    }

    return 1;
  }

  return 0;
}

void find_devices() {
	usb_handle* handle = NULL;
  char entry_buffer[2048];
  char interf_name[2048];
  AdbInterfaceInfo* next_interface = (AdbInterfaceInfo*)(&entry_buffer[0]);
  unsigned long entry_buffer_size = sizeof(entry_buffer);
  char* copy_name;

  // Enumerate all present and active interfaces.
  ADBAPIHANDLE enum_handle =
    AdbEnumInterfaces(usb_class_id, true, true, true);

  if (NULL == enum_handle)
    return;

  while (AdbNextInterface(enum_handle, next_interface, &entry_buffer_size)) {
    // TODO: FIXME - temp hack converting wchar_t into char.
    // It would be better to change AdbNextInterface so it will return
    // interface name as single char string.
    const wchar_t* wchar_name = next_interface->device_name;
    for(copy_name = interf_name;
        L'\0' != *wchar_name;
        wchar_name++, copy_name++) {
      *copy_name = (char)(*wchar_name);
    }
    *copy_name = '\0';

    // Lets see if we already have this device in the list
    if (!known_device(interf_name)) {
      // This seems to be a new device. Open it!
        handle = do_usb_open(next_interface->device_name);
        if (NULL != handle) {
        // Lets see if this interface (device) belongs to us
        if (recognized_device(handle)) {
          D("adding a new device %s\n", interf_name);
          char serial_number[512];
          unsigned long serial_number_len = sizeof(serial_number);
          if (AdbGetSerialNumber(handle->adb_interface,
                                serial_number,
                                &serial_number_len,
                                true)) {
            // Lets make sure that we don't duplicate this device
            if (register_new_device(handle)) {
              register_usb_transport(handle, serial_number);
            } else {
              D("register_new_device failed for %s\n", interf_name);
              usb_cleanup_handle(handle);
              free(handle);
            }
          } else {
            D("cannot get serial number\n");
            usb_cleanup_handle(handle);
            free(handle);
          }
        } else {
          usb_cleanup_handle(handle);
          free(handle);
        }
      }
    }

    entry_buffer_size = sizeof(entry_buffer);
  }

  AdbCloseHandle(enum_handle);
}