libusb  1.0.25
A cross-platform user library to access USB devices
libusb.h
1 /*
2  * Public libusb header file
3  * Copyright © 2001 Johannes Erdfelt <johannes@erdfelt.com>
4  * Copyright © 2007-2008 Daniel Drake <dsd@gentoo.org>
5  * Copyright © 2012 Pete Batard <pete@akeo.ie>
6  * Copyright © 2012-2018 Nathan Hjelm <hjelmn@cs.unm.edu>
7  * Copyright © 2014-2020 Chris Dickens <christopher.a.dickens@gmail.com>
8  * For more information, please visit: http://libusb.info
9  *
10  * This library is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * This library is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with this library; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 #ifndef LIBUSB_H
26 #define LIBUSB_H
27 
28 #if defined(_MSC_VER)
29 /* on MS environments, the inline keyword is available in C++ only */
30 #if !defined(__cplusplus)
31 #define inline __inline
32 #endif
33 /* ssize_t is also not available */
34 #ifndef _SSIZE_T_DEFINED
35 #define _SSIZE_T_DEFINED
36 #include <basetsd.h>
37 typedef SSIZE_T ssize_t;
38 #endif /* _SSIZE_T_DEFINED */
39 #endif /* _MSC_VER */
40 
41 #include <limits.h>
42 #include <stdint.h>
43 #include <sys/types.h>
44 #if !defined(_MSC_VER)
45 #include <sys/time.h>
46 #endif
47 #include <time.h>
48 
49 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
50 #define ZERO_SIZED_ARRAY /* [] - valid C99 code */
51 #else
52 #define ZERO_SIZED_ARRAY 0 /* [0] - non-standard, but usually working code */
53 #endif /* __STDC_VERSION__ */
54 
55 /* 'interface' might be defined as a macro on Windows, so we need to
56  * undefine it so as not to break the current libusb API, because
57  * libusb_config_descriptor has an 'interface' member
58  * As this can be problematic if you include windows.h after libusb.h
59  * in your sources, we force windows.h to be included first. */
60 #if defined(_WIN32) || defined(__CYGWIN__)
61 #include <windows.h>
62 #if defined(interface)
63 #undef interface
64 #endif
65 #if !defined(__CYGWIN__)
66 #include <winsock.h>
67 #endif
68 #endif /* _WIN32 || __CYGWIN__ */
69 
70 #if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
71 #define LIBUSB_DEPRECATED_FOR(f) __attribute__ ((deprecated ("Use " #f " instead")))
72 #elif defined(__GNUC__) && (__GNUC__ >= 3)
73 #define LIBUSB_DEPRECATED_FOR(f) __attribute__ ((deprecated))
74 #else
75 #define LIBUSB_DEPRECATED_FOR(f)
76 #endif /* __GNUC__ */
77 
78 #if defined(__GNUC__)
79 #define LIBUSB_PACKED __attribute__ ((packed))
80 #else
81 #define LIBUSB_PACKED
82 #endif /* __GNUC__ */
83 
109 /* LIBUSB_CALL must be defined on both definition and declaration of libusb
110  * functions. You'd think that declaration would be enough, but cygwin will
111  * complain about conflicting types unless both are marked this way.
112  * The placement of this macro is important too; it must appear after the
113  * return type, before the function name. See internal documentation for
114  * API_EXPORTED.
115  */
116 #if defined(_WIN32) || defined(__CYGWIN__)
117 #define LIBUSB_CALL WINAPI
118 #else
119 #define LIBUSB_CALL
120 #endif /* _WIN32 || __CYGWIN__ */
121 
142 #define LIBUSB_API_VERSION 0x01000109
143 
144 /* The following is kept for compatibility, but will be deprecated in the future */
145 #define LIBUSBX_API_VERSION LIBUSB_API_VERSION
146 
147 #if defined(__cplusplus)
148 extern "C" {
149 #endif
150 
159 static inline uint16_t libusb_cpu_to_le16(const uint16_t x)
160 {
161  union {
162  uint8_t b8[2];
163  uint16_t b16;
164  } _tmp;
165  _tmp.b8[1] = (uint8_t) (x >> 8);
166  _tmp.b8[0] = (uint8_t) (x & 0xff);
167  return _tmp.b16;
168 }
169 
178 #define libusb_le16_to_cpu libusb_cpu_to_le16
179 
180 /* standard USB stuff */
181 
190 
193 
196 
199 
202 
205  LIBUSB_CLASS_PTP = 0x06, /* legacy name from libusb-0.1 usb.h */
206 
209 
212 
215 
218 
221 
224 
227 
230 
233 
236 
239 
242 
245 };
246 
252 
255 
258 
261 
264 
267 
270 
273 
276 
279 
282 
285 
288 };
289 
290 /* Descriptor sizes per descriptor type */
291 #define LIBUSB_DT_DEVICE_SIZE 18
292 #define LIBUSB_DT_CONFIG_SIZE 9
293 #define LIBUSB_DT_INTERFACE_SIZE 9
294 #define LIBUSB_DT_ENDPOINT_SIZE 7
295 #define LIBUSB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */
296 #define LIBUSB_DT_HUB_NONVAR_SIZE 7
297 #define LIBUSB_DT_SS_ENDPOINT_COMPANION_SIZE 6
298 #define LIBUSB_DT_BOS_SIZE 5
299 #define LIBUSB_DT_DEVICE_CAPABILITY_SIZE 3
300 
301 /* BOS descriptor sizes */
302 #define LIBUSB_BT_USB_2_0_EXTENSION_SIZE 7
303 #define LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE 10
304 #define LIBUSB_BT_CONTAINER_ID_SIZE 20
305 
306 /* We unwrap the BOS => define its max size */
307 #define LIBUSB_DT_BOS_MAX_SIZE \
308  (LIBUSB_DT_BOS_SIZE + \
309  LIBUSB_BT_USB_2_0_EXTENSION_SIZE + \
310  LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE + \
311  LIBUSB_BT_CONTAINER_ID_SIZE)
312 
313 #define LIBUSB_ENDPOINT_ADDRESS_MASK 0x0f /* in bEndpointAddress */
314 #define LIBUSB_ENDPOINT_DIR_MASK 0x80
315 
323 
325  LIBUSB_ENDPOINT_IN = 0x80
326 };
327 
328 #define LIBUSB_TRANSFER_TYPE_MASK 0x03 /* in bmAttributes */
329 
337 
340 
343 
346 };
347 
353 
356 
357  /* 0x02 is reserved */
358 
361 
362  /* 0x04 is reserved */
363 
366 
369 
372 
375 
378 
381 
384 
387 
390 
394 };
395 
403 
406 
409 
411  LIBUSB_REQUEST_TYPE_RESERVED = (0x03 << 5)
412 };
413 
421 
424 
427 
430 };
431 
432 #define LIBUSB_ISO_SYNC_TYPE_MASK 0x0c
433 
442 
445 
448 
451 };
452 
453 #define LIBUSB_ISO_USAGE_TYPE_MASK 0x30
454 
463 
466 
469 };
470 
478 
481 
484 
487 };
488 
496  LIBUSB_BM_LPM_SUPPORT = (1 << 1)
497 };
498 
506  LIBUSB_BM_LTM_SUPPORT = (1 << 1)
507 };
508 
515 
518 
521 
524 };
525 
533  uint8_t bLength;
534 
539 
542  uint16_t bcdUSB;
543 
545  uint8_t bDeviceClass;
546 
550 
554 
557 
559  uint16_t idVendor;
560 
562  uint16_t idProduct;
563 
565  uint16_t bcdDevice;
566 
568  uint8_t iManufacturer;
569 
571  uint8_t iProduct;
572 
574  uint8_t iSerialNumber;
575 
578 };
579 
587  uint8_t bLength;
588 
593 
598 
605  uint8_t bmAttributes;
606 
608  uint16_t wMaxPacketSize;
609 
611  uint8_t bInterval;
612 
615  uint8_t bRefresh;
616 
618  uint8_t bSynchAddress;
619 
622  const unsigned char *extra;
623 
626 };
627 
635  uint8_t bLength;
636 
641 
644 
647 
650  uint8_t bNumEndpoints;
651 
654 
658 
662 
664  uint8_t iInterface;
665 
669 
672  const unsigned char *extra;
673 
676 };
677 
685 
689 };
690 
698  uint8_t bLength;
699 
704 
706  uint16_t wTotalLength;
707 
709  uint8_t bNumInterfaces;
710 
713 
715  uint8_t iConfiguration;
716 
718  uint8_t bmAttributes;
719 
724  uint8_t MaxPower;
725 
729 
732  const unsigned char *extra;
733 
736 };
737 
746  uint8_t bLength;
747 
752 
755  uint8_t bMaxBurst;
756 
761  uint8_t bmAttributes;
762 
766 };
767 
775  uint8_t bLength;
776 
781 
784 
786  uint8_t dev_capability_data[ZERO_SIZED_ARRAY];
787 };
788 
796  uint8_t bLength;
797 
802 
804  uint16_t wTotalLength;
805 
808  uint8_t bNumDeviceCaps;
809 
812 };
813 
821  uint8_t bLength;
822 
827 
832 
837  uint32_t bmAttributes;
838 };
839 
847  uint8_t bLength;
848 
853 
858 
863  uint8_t bmAttributes;
864 
867  uint16_t wSpeedSupported;
868 
874 
876  uint8_t bU1DevExitLat;
877 
879  uint16_t bU2DevExitLat;
880 };
881 
889  uint8_t bLength;
890 
895 
900 
902  uint8_t bReserved;
903 
905  uint8_t ContainerID[16];
906 };
907 
910 #if defined(_MSC_VER) || defined(__WATCOMC__)
911 #pragma pack(push, 1)
912 #endif
919  uint8_t bmRequestType;
920 
926  uint8_t bRequest;
927 
929  uint16_t wValue;
930 
933  uint16_t wIndex;
934 
936  uint16_t wLength;
937 } LIBUSB_PACKED;
938 #if defined(_MSC_VER) || defined(__WATCOMC__)
939 #pragma pack(pop)
940 #endif
941 
942 #define LIBUSB_CONTROL_SETUP_SIZE (sizeof(struct libusb_control_setup))
943 
944 /* libusb */
945 
946 struct libusb_context;
947 struct libusb_device;
948 struct libusb_device_handle;
949 
955  const uint16_t major;
956 
958  const uint16_t minor;
959 
961  const uint16_t micro;
962 
964  const uint16_t nano;
965 
967  const char *rc;
968 
970  const char *describe;
971 };
972 
991 typedef struct libusb_context libusb_context;
992 
1008 typedef struct libusb_device libusb_device;
1009 
1010 
1020 
1027 
1030 
1033 
1036 
1039 
1042 };
1043 
1054 
1057 
1060 
1063 
1066 
1069 
1072 
1075 
1078 
1081 
1084 
1087 
1090 
1091  /* NB: Remember to update LIBUSB_ERROR_COUNT below as well as the
1092  message strings in strerror.c when adding new error codes here. */
1093 
1095  LIBUSB_ERROR_OTHER = -99
1096 };
1097 
1098 /* Total number of error codes in enum libusb_error */
1099 #define LIBUSB_ERROR_COUNT 14
1100 
1106 
1109 
1112 
1115 
1118 };
1119 
1126 
1129 
1132 
1135 
1139 
1142 
1145 
1146  /* NB! Remember to update libusb_error_name()
1147  when adding new status codes here. */
1148 };
1149 
1155 
1161 
1167 
1192 };
1193 
1198  unsigned int length;
1199 
1201  unsigned int actual_length;
1202 
1205 };
1206 
1207 struct libusb_transfer;
1208 
1218 typedef void (LIBUSB_CALL *libusb_transfer_cb_fn)(struct libusb_transfer *transfer);
1219 
1229 
1231  uint8_t flags;
1232 
1234  unsigned char endpoint;
1235 
1237  unsigned char type;
1238 
1241  unsigned int timeout;
1242 
1251 
1253  int length;
1254 
1259 
1263 
1274  void *user_data;
1275 
1277  unsigned char *buffer;
1278 
1282 
1284  struct libusb_iso_packet_descriptor iso_packet_desc[ZERO_SIZED_ARRAY];
1285 };
1286 
1295 
1298 
1304 
1308 };
1309 
1316 
1319 
1322 
1325 
1328 };
1329 
1340 
1342  LIBUSB_LOG_CB_CONTEXT = (1 << 1)
1343 };
1344 
1357  enum libusb_log_level level, const char *str);
1358 
1361 LIBUSB_DEPRECATED_FOR(libusb_set_option)
1362 void LIBUSB_CALL libusb_set_debug(libusb_context *ctx, int level);
1364 const struct libusb_version * LIBUSB_CALL libusb_get_version(void);
1365 int LIBUSB_CALL libusb_has_capability(uint32_t capability);
1366 const char * LIBUSB_CALL libusb_error_name(int errcode);
1367 int LIBUSB_CALL libusb_setlocale(const char *locale);
1368 const char * LIBUSB_CALL libusb_strerror(int errcode);
1369 
1371  libusb_device ***list);
1373  int unref_devices);
1376 
1378  int *config);
1380  struct libusb_device_descriptor *desc);
1382  struct libusb_config_descriptor **config);
1384  uint8_t config_index, struct libusb_config_descriptor **config);
1386  uint8_t bConfigurationValue, struct libusb_config_descriptor **config);
1388  struct libusb_config_descriptor *config);
1390  libusb_context *ctx,
1391  const struct libusb_endpoint_descriptor *endpoint,
1392  struct libusb_ss_endpoint_companion_descriptor **ep_comp);
1394  struct libusb_ss_endpoint_companion_descriptor *ep_comp);
1396  struct libusb_bos_descriptor **bos);
1399  libusb_context *ctx,
1400  struct libusb_bos_dev_capability_descriptor *dev_cap,
1401  struct libusb_usb_2_0_extension_descriptor **usb_2_0_extension);
1403  struct libusb_usb_2_0_extension_descriptor *usb_2_0_extension);
1405  libusb_context *ctx,
1406  struct libusb_bos_dev_capability_descriptor *dev_cap,
1407  struct libusb_ss_usb_device_capability_descriptor **ss_usb_device_cap);
1409  struct libusb_ss_usb_device_capability_descriptor *ss_usb_device_cap);
1411  struct libusb_bos_dev_capability_descriptor *dev_cap,
1412  struct libusb_container_id_descriptor **container_id);
1414  struct libusb_container_id_descriptor *container_id);
1417 int LIBUSB_CALL libusb_get_port_numbers(libusb_device *dev, uint8_t *port_numbers, int port_numbers_len);
1418 LIBUSB_DEPRECATED_FOR(libusb_get_port_numbers)
1419 int LIBUSB_CALL libusb_get_port_path(libusb_context *ctx, libusb_device *dev, uint8_t *path, uint8_t path_length);
1424  unsigned char endpoint);
1426  unsigned char endpoint);
1427 
1428 int LIBUSB_CALL libusb_wrap_sys_device(libusb_context *ctx, intptr_t sys_dev, libusb_device_handle **dev_handle);
1432 
1434  int configuration);
1436  int interface_number);
1438  int interface_number);
1439 
1441  libusb_context *ctx, uint16_t vendor_id, uint16_t product_id);
1442 
1444  int interface_number, int alternate_setting);
1446  unsigned char endpoint);
1448 
1450  uint32_t num_streams, unsigned char *endpoints, int num_endpoints);
1452  unsigned char *endpoints, int num_endpoints);
1453 
1454 unsigned char * LIBUSB_CALL libusb_dev_mem_alloc(libusb_device_handle *dev_handle,
1455  size_t length);
1457  unsigned char *buffer, size_t length);
1458 
1460  int interface_number);
1462  int interface_number);
1464  int interface_number);
1466  libusb_device_handle *dev_handle, int enable);
1467 
1468 /* async I/O */
1469 
1482 static inline unsigned char *libusb_control_transfer_get_data(
1483  struct libusb_transfer *transfer)
1484 {
1485  return transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE;
1486 }
1487 
1501  struct libusb_transfer *transfer)
1502 {
1503  return (struct libusb_control_setup *)(void *)transfer->buffer;
1504 }
1505 
1529 static inline void libusb_fill_control_setup(unsigned char *buffer,
1530  uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
1531  uint16_t wLength)
1532 {
1533  struct libusb_control_setup *setup = (struct libusb_control_setup *)(void *)buffer;
1534  setup->bmRequestType = bmRequestType;
1535  setup->bRequest = bRequest;
1536  setup->wValue = libusb_cpu_to_le16(wValue);
1537  setup->wIndex = libusb_cpu_to_le16(wIndex);
1539 }
1540 
1541 struct libusb_transfer * LIBUSB_CALL libusb_alloc_transfer(int iso_packets);
1542 int LIBUSB_CALL libusb_submit_transfer(struct libusb_transfer *transfer);
1543 int LIBUSB_CALL libusb_cancel_transfer(struct libusb_transfer *transfer);
1544 void LIBUSB_CALL libusb_free_transfer(struct libusb_transfer *transfer);
1546  struct libusb_transfer *transfer, uint32_t stream_id);
1548  struct libusb_transfer *transfer);
1549 
1578 static inline void libusb_fill_control_transfer(
1579  struct libusb_transfer *transfer, libusb_device_handle *dev_handle,
1580  unsigned char *buffer, libusb_transfer_cb_fn callback, void *user_data,
1581  unsigned int timeout)
1582 {
1583  struct libusb_control_setup *setup = (struct libusb_control_setup *)(void *)buffer;
1584  transfer->dev_handle = dev_handle;
1585  transfer->endpoint = 0;
1586  transfer->type = LIBUSB_TRANSFER_TYPE_CONTROL;
1587  transfer->timeout = timeout;
1588  transfer->buffer = buffer;
1589  if (setup)
1590  transfer->length = (int) (LIBUSB_CONTROL_SETUP_SIZE
1591  + libusb_le16_to_cpu(setup->wLength));
1592  transfer->user_data = user_data;
1593  transfer->callback = callback;
1594 }
1595 
1609 static inline void libusb_fill_bulk_transfer(struct libusb_transfer *transfer,
1610  libusb_device_handle *dev_handle, unsigned char endpoint,
1611  unsigned char *buffer, int length, libusb_transfer_cb_fn callback,
1612  void *user_data, unsigned int timeout)
1613 {
1614  transfer->dev_handle = dev_handle;
1615  transfer->endpoint = endpoint;
1616  transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
1617  transfer->timeout = timeout;
1618  transfer->buffer = buffer;
1619  transfer->length = length;
1620  transfer->user_data = user_data;
1621  transfer->callback = callback;
1622 }
1623 
1641  struct libusb_transfer *transfer, libusb_device_handle *dev_handle,
1642  unsigned char endpoint, uint32_t stream_id,
1643  unsigned char *buffer, int length, libusb_transfer_cb_fn callback,
1644  void *user_data, unsigned int timeout)
1645 {
1646  libusb_fill_bulk_transfer(transfer, dev_handle, endpoint, buffer,
1647  length, callback, user_data, timeout);
1649  libusb_transfer_set_stream_id(transfer, stream_id);
1650 }
1651 
1666  struct libusb_transfer *transfer, libusb_device_handle *dev_handle,
1667  unsigned char endpoint, unsigned char *buffer, int length,
1668  libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout)
1669 {
1670  transfer->dev_handle = dev_handle;
1671  transfer->endpoint = endpoint;
1673  transfer->timeout = timeout;
1674  transfer->buffer = buffer;
1675  transfer->length = length;
1676  transfer->user_data = user_data;
1677  transfer->callback = callback;
1678 }
1679 
1694 static inline void libusb_fill_iso_transfer(struct libusb_transfer *transfer,
1695  libusb_device_handle *dev_handle, unsigned char endpoint,
1696  unsigned char *buffer, int length, int num_iso_packets,
1697  libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout)
1698 {
1699  transfer->dev_handle = dev_handle;
1700  transfer->endpoint = endpoint;
1702  transfer->timeout = timeout;
1703  transfer->buffer = buffer;
1704  transfer->length = length;
1705  transfer->num_iso_packets = num_iso_packets;
1706  transfer->user_data = user_data;
1707  transfer->callback = callback;
1708 }
1709 
1719  struct libusb_transfer *transfer, unsigned int length)
1720 {
1721  int i;
1722 
1723  for (i = 0; i < transfer->num_iso_packets; i++)
1724  transfer->iso_packet_desc[i].length = length;
1725 }
1726 
1743 static inline unsigned char *libusb_get_iso_packet_buffer(
1744  struct libusb_transfer *transfer, unsigned int packet)
1745 {
1746  int i;
1747  size_t offset = 0;
1748  int _packet;
1749 
1750  /* oops..slight bug in the API. packet is an unsigned int, but we use
1751  * signed integers almost everywhere else. range-check and convert to
1752  * signed to avoid compiler warnings. FIXME for libusb-2. */
1753  if (packet > INT_MAX)
1754  return NULL;
1755  _packet = (int) packet;
1756 
1757  if (_packet >= transfer->num_iso_packets)
1758  return NULL;
1759 
1760  for (i = 0; i < _packet; i++)
1761  offset += transfer->iso_packet_desc[i].length;
1762 
1763  return transfer->buffer + offset;
1764 }
1765 
1785 static inline unsigned char *libusb_get_iso_packet_buffer_simple(
1786  struct libusb_transfer *transfer, unsigned int packet)
1787 {
1788  int _packet;
1789 
1790  /* oops..slight bug in the API. packet is an unsigned int, but we use
1791  * signed integers almost everywhere else. range-check and convert to
1792  * signed to avoid compiler warnings. FIXME for libusb-2. */
1793  if (packet > INT_MAX)
1794  return NULL;
1795  _packet = (int) packet;
1796 
1797  if (_packet >= transfer->num_iso_packets)
1798  return NULL;
1799 
1800  return transfer->buffer + ((int) transfer->iso_packet_desc[0].length * _packet);
1801 }
1802 
1803 /* sync I/O */
1804 
1806  uint8_t request_type, uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
1807  unsigned char *data, uint16_t wLength, unsigned int timeout);
1808 
1810  unsigned char endpoint, unsigned char *data, int length,
1811  int *actual_length, unsigned int timeout);
1812 
1814  unsigned char endpoint, unsigned char *data, int length,
1815  int *actual_length, unsigned int timeout);
1816 
1829 static inline int libusb_get_descriptor(libusb_device_handle *dev_handle,
1830  uint8_t desc_type, uint8_t desc_index, unsigned char *data, int length)
1831 {
1832  return libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_IN,
1833  LIBUSB_REQUEST_GET_DESCRIPTOR, (uint16_t) ((desc_type << 8) | desc_index),
1834  0, data, (uint16_t) length, 1000);
1835 }
1836 
1852  uint8_t desc_index, uint16_t langid, unsigned char *data, int length)
1853 {
1854  return libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_IN,
1855  LIBUSB_REQUEST_GET_DESCRIPTOR, (uint16_t)((LIBUSB_DT_STRING << 8) | desc_index),
1856  langid, data, (uint16_t) length, 1000);
1857 }
1858 
1860  uint8_t desc_index, unsigned char *data, int length);
1861 
1862 /* polling and timeouts */
1863 
1872 int LIBUSB_CALL libusb_wait_for_event(libusb_context *ctx, struct timeval *tv);
1873 
1875  struct timeval *tv);
1877  struct timeval *tv, int *completed);
1881  struct timeval *tv);
1884  struct timeval *tv);
1885 
1891  int fd;
1892 
1897  short events;
1898 };
1899 
1910 typedef void (LIBUSB_CALL *libusb_pollfd_added_cb)(int fd, short events,
1911  void *user_data);
1912 
1922 typedef void (LIBUSB_CALL *libusb_pollfd_removed_cb)(int fd, void *user_data);
1923 
1925  libusb_context *ctx);
1926 void LIBUSB_CALL libusb_free_pollfds(const struct libusb_pollfd **pollfds);
1928  libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb,
1929  void *user_data);
1930 
1944 
1950 typedef enum {
1953 
1959 
1965 typedef enum {
1967  LIBUSB_HOTPLUG_ENUMERATE = (1 << 0)
1969 
1972 #define LIBUSB_HOTPLUG_NO_FLAGS 0
1973 
1976 #define LIBUSB_HOTPLUG_MATCH_ANY -1
1977 
2001  libusb_device *device, libusb_hotplug_event event, void *user_data);
2002 
2039  int events, int flags,
2040  int vendor_id, int product_id, int dev_class,
2041  libusb_hotplug_callback_fn cb_fn, void *user_data,
2042  libusb_hotplug_callback_handle *callback_handle);
2043 
2056  libusb_hotplug_callback_handle callback_handle);
2057 
2067  libusb_hotplug_callback_handle callback_handle);
2068 
2095 
2104 
2123 
2124 #define LIBUSB_OPTION_WEAK_AUTHORITY LIBUSB_OPTION_NO_DEVICE_DISCOVERY
2125 
2126  LIBUSB_OPTION_MAX = 3
2127 };
2128 
2129 int LIBUSB_CALL libusb_set_option(libusb_context *ctx, enum libusb_option option, ...);
2130 
2131 #if defined(__cplusplus)
2132 }
2133 #endif
2134 
2135 #endif
struct libusb_transfer * libusb_alloc_transfer(int iso_packets)
Allocate a libusb transfer with a specified number of isochronous packet descriptors.
Definition: io.c:1285
libusb_transfer_flags
libusb_transfer.flags values
Definition: libusb.h:1152
static void libusb_fill_iso_transfer(struct libusb_transfer *transfer, libusb_device_handle *dev_handle, unsigned char endpoint, unsigned char *buffer, int length, int num_iso_packets, libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout)
Helper function to populate the required libusb_transfer fields for an isochronous transfer.
Definition: libusb.h:1694
static void libusb_fill_control_transfer(struct libusb_transfer *transfer, libusb_device_handle *dev_handle, unsigned char *buffer, libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout)
Helper function to populate the required libusb_transfer fields for a control transfer.
Definition: libusb.h:1578
static unsigned char * libusb_get_iso_packet_buffer_simple(struct libusb_transfer *transfer, unsigned int packet)
Convenience function to locate the position of an isochronous packet within the buffer of an isochron...
Definition: libusb.h:1785
unsigned char * libusb_dev_mem_alloc(libusb_device_handle *dev_handle, size_t length)
Attempts to allocate a block of persistent DMA memory suitable for transfers against the given device...
Definition: core.c:1929
static void libusb_fill_control_setup(unsigned char *buffer, uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, uint16_t wLength)
Helper function to populate the setup packet (first 8 bytes of the data buffer) for a control transfe...
Definition: libusb.h:1529
uint32_t libusb_transfer_get_stream_id(struct libusb_transfer *transfer)
Get a transfers bulk stream id.
Definition: io.c:1646
int libusb_cancel_transfer(struct libusb_transfer *transfer)
Asynchronously cancel a previously submitted transfer.
Definition: io.c:1585
static struct libusb_control_setup * libusb_control_transfer_get_setup(struct libusb_transfer *transfer)
Get the control setup packet of a control transfer.
Definition: libusb.h:1500
void libusb_free_transfer(struct libusb_transfer *transfer)
Free a transfer structure.
Definition: io.c:1332
static unsigned char * libusb_get_iso_packet_buffer(struct libusb_transfer *transfer, unsigned int packet)
Convenience function to locate the position of an isochronous packet within the buffer of an isochron...
Definition: libusb.h:1743
static void libusb_fill_interrupt_transfer(struct libusb_transfer *transfer, libusb_device_handle *dev_handle, unsigned char endpoint, unsigned char *buffer, int length, libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout)
Helper function to populate the required libusb_transfer fields for an interrupt transfer.
Definition: libusb.h:1665
libusb_transfer_status
Transfer status codes.
Definition: libusb.h:1122
int libusb_free_streams(libusb_device_handle *dev_handle, unsigned char *endpoints, int num_endpoints)
Free usb bulk streams allocated with libusb_alloc_streams().
Definition: core.c:1886
int libusb_submit_transfer(struct libusb_transfer *transfer)
Submit a transfer.
Definition: io.c:1490
static void libusb_fill_bulk_stream_transfer(struct libusb_transfer *transfer, libusb_device_handle *dev_handle, unsigned char endpoint, uint32_t stream_id, unsigned char *buffer, int length, libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout)
Helper function to populate the required libusb_transfer fields for a bulk transfer using bulk stream...
Definition: libusb.h:1640
void(* libusb_transfer_cb_fn)(struct libusb_transfer *transfer)
Asynchronous transfer callback function type.
Definition: libusb.h:1218
libusb_transfer_type
Transfer type.
Definition: libusb.h:1103
static void libusb_set_iso_packet_lengths(struct libusb_transfer *transfer, unsigned int length)
Convenience function to set the length of all packets in an isochronous transfer, based on the num_is...
Definition: libusb.h:1718
static void libusb_fill_bulk_transfer(struct libusb_transfer *transfer, libusb_device_handle *dev_handle, unsigned char endpoint, unsigned char *buffer, int length, libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout)
Helper function to populate the required libusb_transfer fields for a bulk transfer.
Definition: libusb.h:1609
int libusb_dev_mem_free(libusb_device_handle *dev_handle, unsigned char *buffer, size_t length)
Free device memory allocated with libusb_dev_mem_alloc().
Definition: core.c:1949
int libusb_alloc_streams(libusb_device_handle *dev_handle, uint32_t num_streams, unsigned char *endpoints, int num_endpoints)
Allocate up to num_streams usb bulk streams on the specified endpoints.
Definition: core.c:1856
static unsigned char * libusb_control_transfer_get_data(struct libusb_transfer *transfer)
Get the data section of a control transfer.
Definition: libusb.h:1482
void libusb_transfer_set_stream_id(struct libusb_transfer *transfer, uint32_t stream_id)
Set a transfers bulk stream id.
Definition: io.c:1629
@ LIBUSB_TRANSFER_ADD_ZERO_PACKET
Terminate transfers that are a multiple of the endpoint's wMaxPacketSize with an extra zero length pa...
Definition: libusb.h:1191
@ LIBUSB_TRANSFER_FREE_TRANSFER
Automatically call libusb_free_transfer() after callback returns.
Definition: libusb.h:1166
@ LIBUSB_TRANSFER_SHORT_NOT_OK
Report short frames as errors.
Definition: libusb.h:1154
@ LIBUSB_TRANSFER_FREE_BUFFER
Automatically free() transfer buffer during libusb_free_transfer().
Definition: libusb.h:1160
@ LIBUSB_TRANSFER_STALL
For bulk/interrupt endpoints: halt condition detected (endpoint stalled).
Definition: libusb.h:1138
@ LIBUSB_TRANSFER_COMPLETED
Transfer completed without error.
Definition: libusb.h:1125
@ LIBUSB_TRANSFER_CANCELLED
Transfer was cancelled.
Definition: libusb.h:1134
@ LIBUSB_TRANSFER_ERROR
Transfer failed.
Definition: libusb.h:1128
@ LIBUSB_TRANSFER_OVERFLOW
Device sent more data than requested.
Definition: libusb.h:1144
@ LIBUSB_TRANSFER_NO_DEVICE
Device was disconnected.
Definition: libusb.h:1141
@ LIBUSB_TRANSFER_TIMED_OUT
Transfer timed out.
Definition: libusb.h:1131
@ LIBUSB_TRANSFER_TYPE_BULK_STREAM
Bulk stream transfer.
Definition: libusb.h:1117
@ LIBUSB_TRANSFER_TYPE_ISOCHRONOUS
Isochronous transfer.
Definition: libusb.h:1108
@ LIBUSB_TRANSFER_TYPE_CONTROL
Control transfer.
Definition: libusb.h:1105
@ LIBUSB_TRANSFER_TYPE_BULK
Bulk transfer.
Definition: libusb.h:1111
@ LIBUSB_TRANSFER_TYPE_INTERRUPT
Interrupt transfer.
Definition: libusb.h:1114
static int libusb_get_string_descriptor(libusb_device_handle *dev_handle, uint8_t desc_index, uint16_t langid, unsigned char *data, int length)
Retrieve a descriptor from a device.
Definition: libusb.h:1851
libusb_descriptor_type
Descriptor types as defined by the USB specification.
Definition: libusb.h:249
libusb_supported_speed
Supported speeds (wSpeedSupported) bitfield.
Definition: libusb.h:475
void libusb_free_config_descriptor(struct libusb_config_descriptor *config)
Free a configuration descriptor obtained from libusb_get_active_config_descriptor() or libusb_get_con...
Definition: descriptor.c:682
int libusb_get_string_descriptor_ascii(libusb_device_handle *dev_handle, uint8_t desc_index, unsigned char *data, int length)
Retrieve a string descriptor in C style ASCII.
Definition: descriptor.c:1085
int libusb_get_config_descriptor_by_value(libusb_device *dev, uint8_t bConfigurationValue, struct libusb_config_descriptor **config)
Get a USB configuration descriptor with a specific bConfigurationValue.
Definition: descriptor.c:642
int libusb_get_active_config_descriptor(libusb_device *dev, struct libusb_config_descriptor **config)
Get the USB configuration descriptor for the currently active configuration.
Definition: descriptor.c:555
void libusb_free_ss_endpoint_companion_descriptor(struct libusb_ss_endpoint_companion_descriptor *ep_comp)
Free a superspeed endpoint companion descriptor obtained from libusb_get_ss_endpoint_companion_descri...
Definition: descriptor.c:754
int libusb_get_device_descriptor(libusb_device *dev, struct libusb_device_descriptor *desc)
Get the USB device descriptor for a given device.
Definition: descriptor.c:531
void libusb_free_usb_2_0_extension_descriptor(struct libusb_usb_2_0_extension_descriptor *usb_2_0_extension)
Free a USB 2.0 Extension descriptor obtained from libusb_get_usb_2_0_extension_descriptor().
Definition: descriptor.c:957
int libusb_get_bos_descriptor(libusb_device_handle *dev_handle, struct libusb_bos_descriptor **bos)
Get a Binary Object Store (BOS) descriptor This is a BLOCKING function, which will send requests to t...
Definition: descriptor.c:846
libusb_bos_type
USB capability types.
Definition: libusb.h:512
int libusb_get_container_id_descriptor(libusb_context *ctx, struct libusb_bos_dev_capability_descriptor *dev_cap, struct libusb_container_id_descriptor **container_id)
Get a Container ID descriptor.
Definition: descriptor.c:1032
libusb_endpoint_direction
Endpoint direction.
Definition: libusb.h:320
libusb_endpoint_transfer_type
Endpoint transfer type.
Definition: libusb.h:334
void libusb_free_ss_usb_device_capability_descriptor(struct libusb_ss_usb_device_capability_descriptor *ss_usb_device_cap)
Free a SuperSpeed USB Device Capability descriptor obtained from libusb_get_ss_usb_device_capability_...
Definition: descriptor.c:1013
static int libusb_get_descriptor(libusb_device_handle *dev_handle, uint8_t desc_type, uint8_t desc_index, unsigned char *data, int length)
Retrieve a descriptor from the default control pipe.
Definition: libusb.h:1829
libusb_iso_sync_type
Synchronization type for isochronous endpoints.
Definition: libusb.h:439
int libusb_get_config_descriptor(libusb_device *dev, uint8_t config_index, struct libusb_config_descriptor **config)
Get a USB configuration descriptor based on its index.
Definition: descriptor.c:596
libusb_ss_usb_device_capability_attributes
Masks for the bits of the bmAttributes field field of the SuperSpeed USB Device Capability descriptor...
Definition: libusb.h:504
int libusb_get_ss_endpoint_companion_descriptor(libusb_context *ctx, const struct libusb_endpoint_descriptor *endpoint, struct libusb_ss_endpoint_companion_descriptor **ep_comp)
Get an endpoints superspeed endpoint companion descriptor (if any)
Definition: descriptor.c:705
libusb_iso_usage_type
Usage type for isochronous endpoints.
Definition: libusb.h:460
libusb_class_code
Device and/or Interface Class codes.
Definition: libusb.h:184
int libusb_get_ss_usb_device_capability_descriptor(libusb_context *ctx, struct libusb_bos_dev_capability_descriptor *dev_cap, struct libusb_ss_usb_device_capability_descriptor **ss_usb_device_cap)
Get a SuperSpeed USB Device Capability descriptor.
Definition: descriptor.c:976
void libusb_free_bos_descriptor(struct libusb_bos_descriptor *bos)
Free a BOS descriptor obtained from libusb_get_bos_descriptor().
Definition: descriptor.c:896
libusb_usb_2_0_extension_attributes
Masks for the bits of the bmAttributes field of the USB 2.0 Extension descriptor.
Definition: libusb.h:494
int libusb_get_usb_2_0_extension_descriptor(libusb_context *ctx, struct libusb_bos_dev_capability_descriptor *dev_cap, struct libusb_usb_2_0_extension_descriptor **usb_2_0_extension)
Get an USB 2.0 Extension descriptor.
Definition: descriptor.c:921
void libusb_free_container_id_descriptor(struct libusb_container_id_descriptor *container_id)
Free a Container ID descriptor obtained from libusb_get_container_id_descriptor().
Definition: descriptor.c:1067
@ LIBUSB_DT_HUB
Hub descriptor.
Definition: libusb.h:281
@ LIBUSB_DT_CONFIG
Configuration descriptor.
Definition: libusb.h:254
@ LIBUSB_DT_STRING
String descriptor.
Definition: libusb.h:257
@ LIBUSB_DT_HID
HID descriptor.
Definition: libusb.h:272
@ LIBUSB_DT_REPORT
HID report descriptor.
Definition: libusb.h:275
@ LIBUSB_DT_DEVICE
Device descriptor.
Definition: libusb.h:251
@ LIBUSB_DT_DEVICE_CAPABILITY
Device Capability descriptor.
Definition: libusb.h:269
@ LIBUSB_DT_SUPERSPEED_HUB
SuperSpeed Hub descriptor.
Definition: libusb.h:284
@ LIBUSB_DT_PHYSICAL
Physical descriptor.
Definition: libusb.h:278
@ LIBUSB_DT_INTERFACE
Interface descriptor.
Definition: libusb.h:260
@ LIBUSB_DT_ENDPOINT
Endpoint descriptor.
Definition: libusb.h:263
@ LIBUSB_DT_SS_ENDPOINT_COMPANION
SuperSpeed Endpoint Companion descriptor.
Definition: libusb.h:287
@ LIBUSB_DT_BOS
BOS descriptor.
Definition: libusb.h:266
@ LIBUSB_HIGH_SPEED_OPERATION
High speed operation supported (480MBit/s).
Definition: libusb.h:483
@ LIBUSB_LOW_SPEED_OPERATION
Low speed operation supported (1.5MBit/s).
Definition: libusb.h:477
@ LIBUSB_SUPER_SPEED_OPERATION
Superspeed operation supported (5000MBit/s).
Definition: libusb.h:486
@ LIBUSB_FULL_SPEED_OPERATION
Full speed operation supported (12MBit/s).
Definition: libusb.h:480
@ LIBUSB_BT_USB_2_0_EXTENSION
USB 2.0 extensions.
Definition: libusb.h:517
@ LIBUSB_BT_SS_USB_DEVICE_CAPABILITY
SuperSpeed USB device capability.
Definition: libusb.h:520
@ LIBUSB_BT_WIRELESS_USB_DEVICE_CAPABILITY
Wireless USB device capability.
Definition: libusb.h:514
@ LIBUSB_BT_CONTAINER_ID
Container ID type.
Definition: libusb.h:523
@ LIBUSB_ENDPOINT_IN
In: device-to-host.
Definition: libusb.h:325
@ LIBUSB_ENDPOINT_OUT
Out: host-to-device.
Definition: libusb.h:322
@ LIBUSB_ENDPOINT_TRANSFER_TYPE_INTERRUPT
Interrupt endpoint.
Definition: libusb.h:345
@ LIBUSB_ENDPOINT_TRANSFER_TYPE_ISOCHRONOUS
Isochronous endpoint.
Definition: libusb.h:339
@ LIBUSB_ENDPOINT_TRANSFER_TYPE_BULK
Bulk endpoint.
Definition: libusb.h:342
@ LIBUSB_ENDPOINT_TRANSFER_TYPE_CONTROL
Control endpoint.
Definition: libusb.h:336
@ LIBUSB_ISO_SYNC_TYPE_SYNC
Synchronous.
Definition: libusb.h:450
@ LIBUSB_ISO_SYNC_TYPE_NONE
No synchronization.
Definition: libusb.h:441
@ LIBUSB_ISO_SYNC_TYPE_ADAPTIVE
Adaptive.
Definition: libusb.h:447
@ LIBUSB_ISO_SYNC_TYPE_ASYNC
Asynchronous.
Definition: libusb.h:444
@ LIBUSB_BM_LTM_SUPPORT
Supports Latency Tolerance Messages (LTM)
Definition: libusb.h:506
@ LIBUSB_ISO_USAGE_TYPE_DATA
Data endpoint.
Definition: libusb.h:462
@ LIBUSB_ISO_USAGE_TYPE_FEEDBACK
Feedback endpoint.
Definition: libusb.h:465
@ LIBUSB_ISO_USAGE_TYPE_IMPLICIT
Implicit feedback Data endpoint.
Definition: libusb.h:468
@ LIBUSB_CLASS_AUDIO
Audio class.
Definition: libusb.h:192
@ LIBUSB_CLASS_HUB
Hub class.
Definition: libusb.h:214
@ LIBUSB_CLASS_MISCELLANEOUS
Miscellaneous class.
Definition: libusb.h:238
@ LIBUSB_CLASS_APPLICATION
Application class.
Definition: libusb.h:241
@ LIBUSB_CLASS_CONTENT_SECURITY
Content Security.
Definition: libusb.h:223
@ LIBUSB_CLASS_DIAGNOSTIC_DEVICE
Diagnostic Device.
Definition: libusb.h:232
@ LIBUSB_CLASS_PHYSICAL
Physical.
Definition: libusb.h:201
@ LIBUSB_CLASS_COMM
Communications class.
Definition: libusb.h:195
@ LIBUSB_CLASS_VIDEO
Video.
Definition: libusb.h:226
@ LIBUSB_CLASS_DATA
Data class.
Definition: libusb.h:217
@ LIBUSB_CLASS_WIRELESS
Wireless class.
Definition: libusb.h:235
@ LIBUSB_CLASS_PRINTER
Printer class.
Definition: libusb.h:208
@ LIBUSB_CLASS_PERSONAL_HEALTHCARE
Personal Healthcare.
Definition: libusb.h:229
@ LIBUSB_CLASS_PER_INTERFACE
In the context of a device descriptor, this bDeviceClass value indicates that each interface specifie...
Definition: libusb.h:189
@ LIBUSB_CLASS_MASS_STORAGE
Mass storage class.
Definition: libusb.h:211
@ LIBUSB_CLASS_HID
Human Interface Device class.
Definition: libusb.h:198
@ LIBUSB_CLASS_VENDOR_SPEC
Class is vendor-specific.
Definition: libusb.h:244
@ LIBUSB_CLASS_IMAGE
Image class.
Definition: libusb.h:204
@ LIBUSB_CLASS_SMART_CARD
Smart Card.
Definition: libusb.h:220
@ LIBUSB_BM_LPM_SUPPORT
Supports Link Power Management (LPM)
Definition: libusb.h:496
libusb_device_handle * libusb_open_device_with_vid_pid(libusb_context *ctx, uint16_t vendor_id, uint16_t product_id)
Convenience function for finding a device with a particular idVendor/idProduct combination.
Definition: core.c:1352
uint8_t libusb_get_port_number(libusb_device *dev)
Get the number of the port that a device is connected to.
Definition: core.c:926
int libusb_kernel_driver_active(libusb_device_handle *dev_handle, int interface_number)
Determine if a kernel driver is active on an interface.
Definition: core.c:1975
libusb_speed
Speed codes.
Definition: libusb.h:1024
void libusb_unref_device(libusb_device *dev)
Decrement the reference count of a device.
Definition: core.c:1180
int libusb_open(libusb_device *dev, libusb_device_handle **dev_handle)
Open a device and obtain a device handle.
Definition: core.c:1297
int libusb_set_interface_alt_setting(libusb_device_handle *dev_handle, int interface_number, int alternate_setting)
Activate an alternate setting for an interface.
Definition: core.c:1752
int libusb_release_interface(libusb_device_handle *dev_handle, int interface_number)
Release an interface previously claimed with libusb_claim_interface().
Definition: core.c:1707
int libusb_get_device_speed(libusb_device *dev)
Get the negotiated connection speed for a device.
Definition: core.c:1009
int libusb_detach_kernel_driver(libusb_device_handle *dev_handle, int interface_number)
Detach a kernel driver from an interface.
Definition: core.c:2013
void libusb_close(libusb_device_handle *dev_handle)
Close a device handle.
Definition: core.c:1452
struct libusb_device libusb_device
Structure representing a USB device detected on the system.
Definition: libusb.h:1008
int libusb_set_configuration(libusb_device_handle *dev_handle, int configuration)
Set the active configuration for a device.
Definition: core.c:1626
struct libusb_device_handle libusb_device_handle
Structure representing a handle on a USB device.
Definition: libusb.h:1019
libusb_device * libusb_get_parent(libusb_device *dev)
Get the the parent from the specified device.
Definition: core.c:988
int libusb_wrap_sys_device(libusb_context *ctx, intptr_t sys_dev, libusb_device_handle **dev_handle)
Wrap a platform-specific system device handle and obtain a libusb device handle for the underlying de...
Definition: core.c:1242
int libusb_get_port_path(libusb_context *ctx, libusb_device *dev, uint8_t *path, uint8_t path_length)
Definition: core.c:968
int libusb_get_port_numbers(libusb_device *dev, uint8_t *port_numbers, int port_numbers_len)
Get the list of all port numbers from root for the specified device.
Definition: core.c:942
libusb_device * libusb_ref_device(libusb_device *dev)
Increment the reference count of a device.
Definition: core.c:1165
uint8_t libusb_get_device_address(libusb_device *dev)
Get the address of the device on the bus it is connected to.
Definition: core.c:998
int libusb_clear_halt(libusb_device_handle *dev_handle, unsigned char endpoint)
Clear the halt/stall condition for an endpoint.
Definition: core.c:1794
ssize_t libusb_get_device_list(libusb_context *ctx, libusb_device ***list)
Returns a list of USB devices currently attached to the system.
Definition: core.c:816
int libusb_set_auto_detach_kernel_driver(libusb_device_handle *dev_handle, int enable)
Enable/disable libusb's automatic kernel driver detachment.
Definition: core.c:2088
int libusb_get_max_packet_size(libusb_device *dev, unsigned char endpoint)
Convenience function to retrieve the wMaxPacketSize value for a particular endpoint in the active dev...
Definition: core.c:1055
void libusb_free_device_list(libusb_device **list, int unref_devices)
Frees a list of devices previously discovered using libusb_get_device_list().
Definition: core.c:886
int libusb_attach_kernel_driver(libusb_device_handle *dev_handle, int interface_number)
Re-attach an interface's kernel driver, which was previously detached using libusb_detach_kernel_driv...
Definition: core.c:2049
int libusb_get_configuration(libusb_device_handle *dev, int *config)
Determine the bConfigurationValue of the currently active configuration.
Definition: core.c:1539
int libusb_get_max_iso_packet_size(libusb_device *dev, unsigned char endpoint)
Calculate the maximum packet size which a specific endpoint is capable is sending or receiving in the...
Definition: core.c:1110
int libusb_claim_interface(libusb_device_handle *dev_handle, int interface_number)
Claim an interface on a given device handle.
Definition: core.c:1663
uint8_t libusb_get_bus_number(libusb_device *dev)
Get the number of the bus that a device is connected to.
Definition: core.c:907
libusb_device * libusb_get_device(libusb_device_handle *dev_handle)
Get the underlying device for a device handle.
Definition: core.c:1514
int libusb_reset_device(libusb_device_handle *dev_handle)
Perform a USB port reset to reinitialize a device.
Definition: core.c:1823
@ LIBUSB_SPEED_FULL
The device is operating at full speed (12MBit/s).
Definition: libusb.h:1032
@ LIBUSB_SPEED_HIGH
The device is operating at high speed (480MBit/s).
Definition: libusb.h:1035
@ LIBUSB_SPEED_LOW
The device is operating at low speed (1.5MBit/s).
Definition: libusb.h:1029
@ LIBUSB_SPEED_SUPER_PLUS
The device is operating at super speed plus (10000MBit/s).
Definition: libusb.h:1041
@ LIBUSB_SPEED_SUPER
The device is operating at super speed (5000MBit/s).
Definition: libusb.h:1038
@ LIBUSB_SPEED_UNKNOWN
The OS doesn't report or know the device speed.
Definition: libusb.h:1026
int(* libusb_hotplug_callback_fn)(libusb_context *ctx, libusb_device *device, libusb_hotplug_event event, void *user_data)
Hotplug callback function type.
Definition: libusb.h:2000
int libusb_hotplug_callback_handle
Callback handle.
Definition: libusb.h:1943
libusb_hotplug_event
Since version 1.0.16, LIBUSB_API_VERSION >= 0x01000102.
Definition: libusb.h:1950
int libusb_hotplug_register_callback(libusb_context *ctx, int events, int flags, int vendor_id, int product_id, int dev_class, libusb_hotplug_callback_fn cb_fn, void *user_data, libusb_hotplug_callback_handle *callback_handle)
Register a hotplug callback function.
Definition: hotplug.c:323
void libusb_hotplug_deregister_callback(libusb_context *ctx, libusb_hotplug_callback_handle callback_handle)
Deregisters a hotplug callback.
Definition: hotplug.c:407
libusb_hotplug_flag
Since version 1.0.16, LIBUSB_API_VERSION >= 0x01000102.
Definition: libusb.h:1965
void * libusb_hotplug_get_user_data(libusb_context *ctx, libusb_hotplug_callback_handle callback_handle)
Gets the user_data associated with a hotplug callback.
Definition: hotplug.c:445
@ LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED
A device has been plugged in and is ready to use.
Definition: libusb.h:1952
@ LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT
A device has left and is no longer available.
Definition: libusb.h:1957
@ LIBUSB_HOTPLUG_ENUMERATE
Arm the callback and fire it for all matching currently attached devices.
Definition: libusb.h:1967
libusb_option
Available option values for libusb_set_option().
Definition: libusb.h:2072
libusb_log_cb_mode
Log callback mode.
Definition: libusb.h:1337
libusb_log_level
Log message levels.
Definition: libusb.h:1313
void libusb_set_log_cb(libusb_context *ctx, libusb_log_cb cb, int mode)
Set log handler.
Definition: core.c:2139
struct libusb_context libusb_context
Structure representing a libusb session.
Definition: libusb.h:991
void libusb_set_debug(libusb_context *ctx, int level)
Definition: core.c:2102
int libusb_init(libusb_context **ctx)
Initialize libusb.
Definition: core.c:2280
void(* libusb_log_cb)(libusb_context *ctx, enum libusb_log_level level, const char *str)
Callback function for handling log messages.
Definition: libusb.h:1356
void libusb_exit(libusb_context *ctx)
Deinitialize libusb.
Definition: core.c:2402
int libusb_set_option(libusb_context *ctx, enum libusb_option option,...)
Set an option in the library.
Definition: core.c:2185
@ LIBUSB_OPTION_NO_DEVICE_DISCOVERY
Do not scan for devices.
Definition: libusb.h:2122
@ LIBUSB_OPTION_LOG_LEVEL
Set the log message verbosity.
Definition: libusb.h:2094
@ LIBUSB_OPTION_USE_USBDK
Use the UsbDk backend for a specific context, if available.
Definition: libusb.h:2103
@ LIBUSB_LOG_CB_GLOBAL
Callback function handling all log messages.
Definition: libusb.h:1339
@ LIBUSB_LOG_CB_CONTEXT
Callback function handling context related log messages.
Definition: libusb.h:1342
@ LIBUSB_LOG_LEVEL_WARNING
(2) : Warning and error messages are emitted
Definition: libusb.h:1321
@ LIBUSB_LOG_LEVEL_INFO
(3) : Informational, warning and error messages are emitted
Definition: libusb.h:1324
@ LIBUSB_LOG_LEVEL_ERROR
(1) : Error messages are emitted
Definition: libusb.h:1318
@ LIBUSB_LOG_LEVEL_NONE
(0) : No messages ever emitted by the library (default)
Definition: libusb.h:1315
@ LIBUSB_LOG_LEVEL_DEBUG
(4) : All messages are emitted
Definition: libusb.h:1327
libusb_request_type
Request type bits of the bmRequestType field in control transfers.
Definition: libusb.h:400
int libusb_setlocale(const char *locale)
Set the language, and only the language, not the encoding! used for translatable libusb messages.
Definition: strerror.c:178
libusb_request_recipient
Recipient bits of the bmRequestType field in control transfers.
Definition: libusb.h:418
#define libusb_le16_to_cpu
Convert a 16-bit value from little-endian to host-endian format.
Definition: libusb.h:178
libusb_standard_request
Standard requests, as defined in table 9-5 of the USB 3.0 specifications.
Definition: libusb.h:350
const struct libusb_version * libusb_get_version(void)
Returns a pointer to const struct libusb_version with the version (major, minor, micro,...
Definition: core.c:2746
int libusb_has_capability(uint32_t capability)
Check at runtime if the loaded library has a given capability.
Definition: core.c:2474
#define LIBUSB_CALL
libusb's Windows calling convention.
Definition: libusb.h:119
libusb_capability
Capabilities supported by an instance of libusb on the current running platform.
Definition: libusb.h:1292
libusb_error
Error codes.
Definition: libusb.h:1051
const char * libusb_error_name(int errcode)
Returns a constant NULL-terminated string with the ASCII name of a libusb error or transfer status co...
Definition: core.c:2691
const char * libusb_strerror(int errcode)
Returns a constant string with a short description of the given error code, this description is inten...
Definition: strerror.c:213
static uint16_t libusb_cpu_to_le16(const uint16_t x)
Convert a 16-bit value from host-endian to little-endian format.
Definition: libusb.h:159
@ LIBUSB_REQUEST_TYPE_VENDOR
Vendor.
Definition: libusb.h:408
@ LIBUSB_REQUEST_TYPE_STANDARD
Standard.
Definition: libusb.h:402
@ LIBUSB_REQUEST_TYPE_CLASS
Class.
Definition: libusb.h:405
@ LIBUSB_REQUEST_TYPE_RESERVED
Reserved.
Definition: libusb.h:411
@ LIBUSB_RECIPIENT_ENDPOINT
Endpoint.
Definition: libusb.h:426
@ LIBUSB_RECIPIENT_INTERFACE
Interface.
Definition: libusb.h:423
@ LIBUSB_RECIPIENT_OTHER
Other.
Definition: libusb.h:429
@ LIBUSB_RECIPIENT_DEVICE
Device.
Definition: libusb.h:420
@ LIBUSB_REQUEST_CLEAR_FEATURE
Clear or disable a specific feature.
Definition: libusb.h:355
@ LIBUSB_REQUEST_GET_INTERFACE
Return the selected alternate setting for the specified interface.
Definition: libusb.h:380
@ LIBUSB_REQUEST_GET_DESCRIPTOR
Get the specified descriptor.
Definition: libusb.h:368
@ LIBUSB_REQUEST_SET_DESCRIPTOR
Used to update existing descriptors or add new descriptors.
Definition: libusb.h:371
@ LIBUSB_REQUEST_GET_STATUS
Request status of the specific recipient.
Definition: libusb.h:352
@ LIBUSB_REQUEST_SET_FEATURE
Set or enable a specific feature.
Definition: libusb.h:360
@ LIBUSB_REQUEST_SET_INTERFACE
Select an alternate interface for the specified interface.
Definition: libusb.h:383
@ LIBUSB_REQUEST_SET_ADDRESS
Set device address for all future accesses.
Definition: libusb.h:365
@ LIBUSB_REQUEST_GET_CONFIGURATION
Get the current device configuration value.
Definition: libusb.h:374
@ LIBUSB_REQUEST_SET_SEL
Sets both the U1 and U2 Exit Latency.
Definition: libusb.h:389
@ LIBUSB_SET_ISOCH_DELAY
Delay from the time a host transmits a packet to the time it is received by the device.
Definition: libusb.h:393
@ LIBUSB_REQUEST_SYNCH_FRAME
Set then report an endpoint's synchronization frame.
Definition: libusb.h:386
@ LIBUSB_REQUEST_SET_CONFIGURATION
Set device configuration.
Definition: libusb.h:377
@ LIBUSB_CAP_HAS_CAPABILITY
The libusb_has_capability() API is available.
Definition: libusb.h:1294
@ LIBUSB_CAP_HAS_HOTPLUG
Hotplug support is available on this platform.
Definition: libusb.h:1297
@ LIBUSB_CAP_HAS_HID_ACCESS
The library can access HID devices without requiring user intervention.
Definition: libusb.h:1303
@ LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER
The library supports detaching of the default USB driver, using libusb_detach_kernel_driver(),...
Definition: libusb.h:1307
@ LIBUSB_ERROR_NOT_SUPPORTED
Operation not supported or unimplemented on this platform.
Definition: libusb.h:1089
@ LIBUSB_ERROR_ACCESS
Access denied (insufficient permissions)
Definition: libusb.h:1062
@ LIBUSB_ERROR_PIPE
Pipe error.
Definition: libusb.h:1080
@ LIBUSB_ERROR_NOT_FOUND
Entity not found.
Definition: libusb.h:1068
@ LIBUSB_ERROR_BUSY
Resource busy.
Definition: libusb.h:1071
@ LIBUSB_ERROR_INTERRUPTED
System call interrupted (perhaps due to signal)
Definition: libusb.h:1083
@ LIBUSB_SUCCESS
Success (no error)
Definition: libusb.h:1053
@ LIBUSB_ERROR_INVALID_PARAM
Invalid parameter.
Definition: libusb.h:1059
@ LIBUSB_ERROR_IO
Input/output error.
Definition: libusb.h:1056
@ LIBUSB_ERROR_OTHER
Other error.
Definition: libusb.h:1095
@ LIBUSB_ERROR_TIMEOUT
Operation timed out.
Definition: libusb.h:1074
@ LIBUSB_ERROR_OVERFLOW
Overflow.
Definition: libusb.h:1077
@ LIBUSB_ERROR_NO_DEVICE
No such device (it may have been disconnected)
Definition: libusb.h:1065
@ LIBUSB_ERROR_NO_MEM
Insufficient memory.
Definition: libusb.h:1086
int libusb_handle_events_completed(libusb_context *ctx, int *completed)
Handle any pending events in blocking mode.
Definition: io.c:2433
void libusb_lock_event_waiters(libusb_context *ctx)
Acquire the event waiters lock.
Definition: io.c:1956
void libusb_interrupt_event_handler(libusb_context *ctx)
Interrupt any active thread that is handling events.
Definition: io.c:1920
void libusb_set_pollfd_notifiers(libusb_context *ctx, libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb, void *user_data)
Register notification functions for file descriptor additions/removals.
Definition: io.c:2615
void(* libusb_pollfd_added_cb)(int fd, short events, void *user_data)
Callback function, invoked when a new file descriptor should be added to the set of file descriptors ...
Definition: libusb.h:1910
void(* libusb_pollfd_removed_cb)(int fd, void *user_data)
Callback function, invoked when a file descriptor should be removed from the set of file descriptors ...
Definition: libusb.h:1922
int libusb_event_handler_active(libusb_context *ctx)
Determine if an active thread is handling events (i.e.
Definition: io.c:1891
void libusb_unlock_event_waiters(libusb_context *ctx)
Release the event waiters lock.
Definition: io.c:1967
int libusb_handle_events_timeout_completed(libusb_context *ctx, struct timeval *tv, int *completed)
Handle any pending events.
Definition: io.c:2319
int libusb_handle_events(libusb_context *ctx)
Handle any pending events in blocking mode.
Definition: io.c:2411
const struct libusb_pollfd ** libusb_get_pollfds(libusb_context *ctx)
Retrieve a list of file descriptors that should be polled by your main loop as libusb event sources.
Definition: io.c:2723
int libusb_get_next_timeout(libusb_context *ctx, struct timeval *tv)
Determine the next internal timeout that libusb needs to handle.
Definition: io.c:2543
int libusb_event_handling_ok(libusb_context *ctx)
Determine if it is still OK for this thread to be doing event handling.
Definition: io.c:1862
int libusb_handle_events_timeout(libusb_context *ctx, struct timeval *tv)
Handle any pending events.
Definition: io.c:2391
int libusb_try_lock_events(libusb_context *ctx)
Attempt to acquire the event handling lock.
Definition: io.c:1769
int libusb_handle_events_locked(libusb_context *ctx, struct timeval *tv)
Handle any pending events by polling file descriptors, without checking if any other threads are alre...
Definition: io.c:2461
void libusb_lock_events(libusb_context *ctx)
Acquire the event handling lock, blocking until successful acquisition if it is contended.
Definition: io.c:1812
void libusb_unlock_events(libusb_context *ctx)
Release the lock previously acquired with libusb_try_lock_events() or libusb_lock_events().
Definition: io.c:1827
void libusb_free_pollfds(const struct libusb_pollfd **pollfds)
Free a list of libusb_pollfd structures.
Definition: io.c:2771
int libusb_wait_for_event(libusb_context *ctx, struct timeval *tv)
Wait for another thread to signal completion of an event.
Definition: io.c:1999
int libusb_pollfds_handle_timeouts(libusb_context *ctx)
Determines whether your application must apply special timing considerations when monitoring libusb's...
Definition: io.c:2509
int libusb_interrupt_transfer(libusb_device_handle *dev_handle, unsigned char endpoint, unsigned char *data, int length, int *actual_length, unsigned int timeout)
Perform a USB interrupt transfer.
Definition: sync.c:328
int libusb_bulk_transfer(libusb_device_handle *dev_handle, unsigned char endpoint, unsigned char *data, int length, int *actual_length, unsigned int timeout)
Perform a USB bulk transfer.
Definition: sync.c:274
int libusb_control_transfer(libusb_device_handle *dev_handle, uint8_t request_type, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, unsigned char *data, uint16_t wLength, unsigned int timeout)
Perform a USB control transfer.
Definition: sync.c:97
A structure representing the Binary Device Object Store (BOS) descriptor.
Definition: libusb.h:794
uint16_t wTotalLength
Length of this descriptor and all of its sub descriptors.
Definition: libusb.h:804
struct libusb_bos_dev_capability_descriptor * dev_capability[ZERO_SIZED_ARRAY]
bNumDeviceCap Device Capability Descriptors
Definition: libusb.h:811
uint8_t bNumDeviceCaps
The number of separate device capability descriptors in the BOS.
Definition: libusb.h:808
uint8_t bLength
Size of this descriptor (in bytes)
Definition: libusb.h:796
uint8_t bDescriptorType
Descriptor type.
Definition: libusb.h:801
A generic representation of a BOS Device Capability descriptor.
Definition: libusb.h:773
uint8_t bLength
Size of this descriptor (in bytes)
Definition: libusb.h:775
uint8_t bDescriptorType
Descriptor type.
Definition: libusb.h:780
uint8_t dev_capability_data[ZERO_SIZED_ARRAY]
Device Capability data (bLength - 3 bytes)
Definition: libusb.h:786
uint8_t bDevCapabilityType
Device Capability type.
Definition: libusb.h:783
A structure representing the standard USB configuration descriptor.
Definition: libusb.h:696
uint8_t bConfigurationValue
Identifier value for this configuration.
Definition: libusb.h:712
uint8_t iConfiguration
Index of string descriptor describing this configuration.
Definition: libusb.h:715
int extra_length
Length of the extra descriptors, in bytes.
Definition: libusb.h:735
uint8_t bLength
Size of this descriptor (in bytes)
Definition: libusb.h:698
uint8_t bNumInterfaces
Number of interfaces supported by this configuration.
Definition: libusb.h:709
uint8_t MaxPower
Maximum power consumption of the USB device from this bus in this configuration when the device is fu...
Definition: libusb.h:724
uint16_t wTotalLength
Total length of data returned for this configuration.
Definition: libusb.h:706
uint8_t bDescriptorType
Descriptor type.
Definition: libusb.h:703
const unsigned char * extra
Extra descriptors.
Definition: libusb.h:732
uint8_t bmAttributes
Configuration characteristics.
Definition: libusb.h:718
const struct libusb_interface * interface
Array of interfaces supported by this configuration.
Definition: libusb.h:728
A structure representing the Container ID descriptor.
Definition: libusb.h:887
uint8_t ContainerID[16]
128 bit UUID
Definition: libusb.h:905
uint8_t bDescriptorType
Descriptor type.
Definition: libusb.h:894
uint8_t bDevCapabilityType
Capability type.
Definition: libusb.h:899
uint8_t bLength
Size of this descriptor (in bytes)
Definition: libusb.h:889
uint8_t bReserved
Reserved field.
Definition: libusb.h:902
Setup packet for control transfers.
Definition: libusb.h:913
uint8_t bRequest
Request.
Definition: libusb.h:926
uint8_t bmRequestType
Request type.
Definition: libusb.h:919
uint16_t wLength
Number of bytes to transfer.
Definition: libusb.h:936
uint16_t wIndex
Index.
Definition: libusb.h:933
uint16_t wValue
Value.
Definition: libusb.h:929
A structure representing the standard USB device descriptor.
Definition: libusb.h:531
uint8_t bNumConfigurations
Number of possible configurations.
Definition: libusb.h:577
uint8_t iProduct
Index of string descriptor describing product.
Definition: libusb.h:571
uint8_t iSerialNumber
Index of string descriptor containing device serial number.
Definition: libusb.h:574
uint8_t bMaxPacketSize0
Maximum packet size for endpoint 0.
Definition: libusb.h:556
uint8_t bDeviceProtocol
USB-IF protocol code for the device, qualified by the bDeviceClass and bDeviceSubClass values.
Definition: libusb.h:553
uint16_t idProduct
USB-IF product ID.
Definition: libusb.h:562
uint8_t bDescriptorType
Descriptor type.
Definition: libusb.h:538
uint8_t bDeviceSubClass
USB-IF subclass code for the device, qualified by the bDeviceClass value.
Definition: libusb.h:549
uint8_t bDeviceClass
USB-IF class code for the device.
Definition: libusb.h:545
uint8_t iManufacturer
Index of string descriptor describing manufacturer.
Definition: libusb.h:568
uint16_t idVendor
USB-IF vendor ID.
Definition: libusb.h:559
uint16_t bcdUSB
USB specification release number in binary-coded decimal.
Definition: libusb.h:542
uint16_t bcdDevice
Device release number in binary-coded decimal.
Definition: libusb.h:565
uint8_t bLength
Size of this descriptor (in bytes)
Definition: libusb.h:533
A structure representing the standard USB endpoint descriptor.
Definition: libusb.h:585
int extra_length
Length of the extra descriptors, in bytes.
Definition: libusb.h:625
uint8_t bEndpointAddress
The address of the endpoint described by this descriptor.
Definition: libusb.h:597
const unsigned char * extra
Extra descriptors.
Definition: libusb.h:622
uint8_t bInterval
Interval for polling endpoint for data transfers.
Definition: libusb.h:611
uint8_t bDescriptorType
Descriptor type.
Definition: libusb.h:592
uint8_t bRefresh
For audio devices only: the rate at which synchronization feedback is provided.
Definition: libusb.h:615
uint8_t bmAttributes
Attributes which apply to the endpoint when it is configured using the bConfigurationValue.
Definition: libusb.h:605
uint8_t bLength
Size of this descriptor (in bytes)
Definition: libusb.h:587
uint8_t bSynchAddress
For audio devices only: the address if the synch endpoint.
Definition: libusb.h:618
uint16_t wMaxPacketSize
Maximum packet size this endpoint is capable of sending/receiving.
Definition: libusb.h:608
A structure representing the standard USB interface descriptor.
Definition: libusb.h:633
uint8_t bInterfaceSubClass
USB-IF subclass code for this interface, qualified by the bInterfaceClass value.
Definition: libusb.h:657
uint8_t iInterface
Index of string descriptor describing this interface.
Definition: libusb.h:664
uint8_t bInterfaceClass
USB-IF class code for this interface.
Definition: libusb.h:653
uint8_t bAlternateSetting
Value used to select this alternate setting for this interface.
Definition: libusb.h:646
const struct libusb_endpoint_descriptor * endpoint
Array of endpoint descriptors.
Definition: libusb.h:668
uint8_t bNumEndpoints
Number of endpoints used by this interface (excluding the control endpoint).
Definition: libusb.h:650
uint8_t bInterfaceProtocol
USB-IF protocol code for this interface, qualified by the bInterfaceClass and bInterfaceSubClass valu...
Definition: libusb.h:661
uint8_t bLength
Size of this descriptor (in bytes)
Definition: libusb.h:635
uint8_t bInterfaceNumber
Number of this interface.
Definition: libusb.h:643
const unsigned char * extra
Extra descriptors.
Definition: libusb.h:672
int extra_length
Length of the extra descriptors, in bytes.
Definition: libusb.h:675
uint8_t bDescriptorType
Descriptor type.
Definition: libusb.h:640
A collection of alternate settings for a particular USB interface.
Definition: libusb.h:681
const struct libusb_interface_descriptor * altsetting
Array of interface descriptors.
Definition: libusb.h:684
int num_altsetting
The number of alternate settings that belong to this interface.
Definition: libusb.h:688
Isochronous packet descriptor.
Definition: libusb.h:1196
unsigned int actual_length
Amount of data that was actually transferred.
Definition: libusb.h:1201
unsigned int length
Length of data to request in this packet.
Definition: libusb.h:1198
enum libusb_transfer_status status
Status code for this packet.
Definition: libusb.h:1204
File descriptor for polling.
Definition: libusb.h:1889
short events
Event flags to poll for from <poll.h>.
Definition: libusb.h:1897
int fd
Numeric file descriptor.
Definition: libusb.h:1891
A structure representing the superspeed endpoint companion descriptor.
Definition: libusb.h:744
uint16_t wBytesPerInterval
The total number of bytes this EP will transfer every service interval.
Definition: libusb.h:765
uint8_t bLength
Size of this descriptor (in bytes)
Definition: libusb.h:746
uint8_t bDescriptorType
Descriptor type.
Definition: libusb.h:751
uint8_t bMaxBurst
The maximum number of packets the endpoint can send or receive as part of a burst.
Definition: libusb.h:755
uint8_t bmAttributes
In bulk EP: bits 4:0 represents the maximum number of streams the EP supports.
Definition: libusb.h:761
A structure representing the SuperSpeed USB Device Capability descriptor This descriptor is documente...
Definition: libusb.h:845
uint8_t bDevCapabilityType
Capability type.
Definition: libusb.h:857
uint16_t wSpeedSupported
Bitmap encoding of the speed supported by this device when operating in SuperSpeed mode.
Definition: libusb.h:867
uint8_t bFunctionalitySupport
The lowest speed at which all the functionality supported by the device is available to the user.
Definition: libusb.h:873
uint16_t bU2DevExitLat
U2 Device Exit Latency.
Definition: libusb.h:879
uint8_t bLength
Size of this descriptor (in bytes)
Definition: libusb.h:847
uint8_t bmAttributes
Bitmap encoding of supported device level features.
Definition: libusb.h:863
uint8_t bU1DevExitLat
U1 Device Exit Latency.
Definition: libusb.h:876
uint8_t bDescriptorType
Descriptor type.
Definition: libusb.h:852
The generic USB transfer structure.
Definition: libusb.h:1226
unsigned char endpoint
Address of the endpoint where this transfer will be sent.
Definition: libusb.h:1234
struct libusb_iso_packet_descriptor iso_packet_desc[ZERO_SIZED_ARRAY]
Isochronous packet descriptors, for isochronous transfers only.
Definition: libusb.h:1284
enum libusb_transfer_status status
The status of the transfer.
Definition: libusb.h:1250
int length
Length of the data buffer.
Definition: libusb.h:1253
libusb_transfer_cb_fn callback
Callback function.
Definition: libusb.h:1262
unsigned char type
Type of the transfer from libusb_transfer_type.
Definition: libusb.h:1237
int actual_length
Actual length of data that was transferred.
Definition: libusb.h:1258
unsigned char * buffer
Data buffer.
Definition: libusb.h:1277
int num_iso_packets
Number of isochronous packets.
Definition: libusb.h:1281
unsigned int timeout
Timeout for this transfer in milliseconds.
Definition: libusb.h:1241
void * user_data
User context data.
Definition: libusb.h:1274
libusb_device_handle * dev_handle
Handle of the device that this transfer will be submitted to.
Definition: libusb.h:1228
uint8_t flags
A bitwise OR combination of libusb_transfer_flags.
Definition: libusb.h:1231
A structure representing the USB 2.0 Extension descriptor This descriptor is documented in section 9....
Definition: libusb.h:819
uint8_t bLength
Size of this descriptor (in bytes)
Definition: libusb.h:821
uint8_t bDevCapabilityType
Capability type.
Definition: libusb.h:831
uint32_t bmAttributes
Bitmap encoding of supported device level features.
Definition: libusb.h:837
uint8_t bDescriptorType
Descriptor type.
Definition: libusb.h:826
Structure providing the version of the libusb runtime.
Definition: libusb.h:953
const uint16_t micro
Library micro version.
Definition: libusb.h:961
const uint16_t major
Library major version.
Definition: libusb.h:955
const char * rc
Library release candidate suffix string, e.g.
Definition: libusb.h:967
const uint16_t minor
Library minor version.
Definition: libusb.h:958
const char * describe
For ABI compatibility only.
Definition: libusb.h:970
const uint16_t nano
Library nano version.
Definition: libusb.h:964