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Diffstat (limited to 'libusb-1.0/include')
| -rw-r--r-- | libusb-1.0/include/libusb.h | 1998 |
1 files changed, 1998 insertions, 0 deletions
diff --git a/libusb-1.0/include/libusb.h b/libusb-1.0/include/libusb.h new file mode 100644 index 0000000..a19ab34 --- /dev/null +++ b/libusb-1.0/include/libusb.h @@ -0,0 +1,1998 @@ +/* + * Public libusb header file + * Copyright © 2001 Johannes Erdfelt <johannes@erdfelt.com> + * Copyright © 2007-2008 Daniel Drake <dsd@gentoo.org> + * Copyright © 2012 Pete Batard <pete@akeo.ie> + * Copyright © 2012 Nathan Hjelm <hjelmn@cs.unm.edu> + * For more information, please visit: http://libusb.info + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef LIBUSB_H +#define LIBUSB_H + +#ifdef _MSC_VER +/* on MS environments, the inline keyword is available in C++ only */ +#if !defined(__cplusplus) +#define inline __inline +#endif +/* ssize_t is also not available (copy/paste from MinGW) */ +#ifndef _SSIZE_T_DEFINED +#define _SSIZE_T_DEFINED +#undef ssize_t +#ifdef _WIN64 + typedef __int64 ssize_t; +#else + typedef int ssize_t; +#endif /* _WIN64 */ +#endif /* _SSIZE_T_DEFINED */ +#endif /* _MSC_VER */ + +/* stdint.h is not available on older MSVC */ +#if defined(_MSC_VER) && (_MSC_VER < 1600) && (!defined(_STDINT)) && (!defined(_STDINT_H)) +typedef unsigned __int8 uint8_t; +typedef unsigned __int16 uint16_t; +typedef unsigned __int32 uint32_t; +#else +#include <stdint.h> +#endif + +#if !defined(_WIN32_WCE) +#include <sys/types.h> +#endif + +#if defined(__linux) || defined(__APPLE__) || defined(__CYGWIN__) +#include <sys/time.h> +#endif + +#include <time.h> +#include <limits.h> + +/* 'interface' might be defined as a macro on Windows, so we need to + * undefine it so as not to break the current libusb API, because + * libusb_config_descriptor has an 'interface' member + * As this can be problematic if you include windows.h after libusb.h + * in your sources, we force windows.h to be included first. */ +#if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE) +#include <windows.h> +#if defined(interface) +#undef interface +#endif +#if !defined(__CYGWIN__) +#include <winsock.h> +#endif +#endif + +#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) +#define LIBUSB_DEPRECATED_FOR(f) \ + __attribute__((deprecated("Use " #f " instead"))) +#else +#define LIBUSB_DEPRECATED_FOR(f) +#endif /* __GNUC__ */ + +/** \def LIBUSB_CALL + * \ingroup misc + * libusb's Windows calling convention. + * + * Under Windows, the selection of available compilers and configurations + * means that, unlike other platforms, there is not <em>one true calling + * convention</em> (calling convention: the manner in which parameters are + * passed to funcions in the generated assembly code). + * + * Matching the Windows API itself, libusb uses the WINAPI convention (which + * translates to the <tt>stdcall</tt> convention) and guarantees that the + * library is compiled in this way. The public header file also includes + * appropriate annotations so that your own software will use the right + * convention, even if another convention is being used by default within + * your codebase. + * + * The one consideration that you must apply in your software is to mark + * all functions which you use as libusb callbacks with this LIBUSB_CALL + * annotation, so that they too get compiled for the correct calling + * convention. + * + * On non-Windows operating systems, this macro is defined as nothing. This + * means that you can apply it to your code without worrying about + * cross-platform compatibility. + */ +/* LIBUSB_CALL must be defined on both definition and declaration of libusb + * functions. You'd think that declaration would be enough, but cygwin will + * complain about conflicting types unless both are marked this way. + * The placement of this macro is important too; it must appear after the + * return type, before the function name. See internal documentation for + * API_EXPORTED. + */ +#if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE) +#define LIBUSB_CALL WINAPI +#else +#define LIBUSB_CALL +#endif + +/** \def LIBUSB_API_VERSION + * \ingroup misc + * libusb's API version. + * + * Since version 1.0.13, to help with feature detection, libusb defines + * a LIBUSB_API_VERSION macro that gets increased every time there is a + * significant change to the API, such as the introduction of a new call, + * the definition of a new macro/enum member, or any other element that + * libusb applications may want to detect at compilation time. + * + * The macro is typically used in an application as follows: + * \code + * #if defined(LIBUSB_API_VERSION) && (LIBUSB_API_VERSION >= 0x01001234) + * // Use one of the newer features from the libusb API + * #endif + * \endcode + * + * Another feature of LIBUSB_API_VERSION is that it can be used to detect + * whether you are compiling against the libusb or the libusb library. + * + * Internally, LIBUSB_API_VERSION is defined as follows: + * (libusb major << 24) | (libusb minor << 16) | (16 bit incremental) + */ +#define LIBUSB_API_VERSION 0x01000103 + +/* The following is kept for compatibility, but will be deprecated in the future */ +#define LIBUSBX_API_VERSION LIBUSB_API_VERSION + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \ingroup misc + * Convert a 16-bit value from host-endian to little-endian format. On + * little endian systems, this function does nothing. On big endian systems, + * the bytes are swapped. + * \param x the host-endian value to convert + * \returns the value in little-endian byte order + */ +static inline uint16_t libusb_cpu_to_le16(const uint16_t x) +{ + union { + uint8_t b8[2]; + uint16_t b16; + } _tmp; + _tmp.b8[1] = (uint8_t) (x >> 8); + _tmp.b8[0] = (uint8_t) (x & 0xff); + return _tmp.b16; +} + +/** \def libusb_le16_to_cpu + * \ingroup misc + * Convert a 16-bit value from little-endian to host-endian format. On + * little endian systems, this function does nothing. On big endian systems, + * the bytes are swapped. + * \param x the little-endian value to convert + * \returns the value in host-endian byte order + */ +#define libusb_le16_to_cpu libusb_cpu_to_le16 + +/* standard USB stuff */ + +/** \ingroup desc + * Device and/or Interface Class codes */ +enum libusb_class_code { + /** In the context of a \ref libusb_device_descriptor "device descriptor", + * this bDeviceClass value indicates that each interface specifies its + * own class information and all interfaces operate independently. + */ + LIBUSB_CLASS_PER_INTERFACE = 0, + + /** Audio class */ + LIBUSB_CLASS_AUDIO = 1, + + /** Communications class */ + LIBUSB_CLASS_COMM = 2, + + /** Human Interface Device class */ + LIBUSB_CLASS_HID = 3, + + /** Physical */ + LIBUSB_CLASS_PHYSICAL = 5, + + /** Printer class */ + LIBUSB_CLASS_PRINTER = 7, + + /** Image class */ + LIBUSB_CLASS_PTP = 6, /* legacy name from libusb-0.1 usb.h */ + LIBUSB_CLASS_IMAGE = 6, + + /** Mass storage class */ + LIBUSB_CLASS_MASS_STORAGE = 8, + + /** Hub class */ + LIBUSB_CLASS_HUB = 9, + + /** Data class */ + LIBUSB_CLASS_DATA = 10, + + /** Smart Card */ + LIBUSB_CLASS_SMART_CARD = 0x0b, + + /** Content Security */ + LIBUSB_CLASS_CONTENT_SECURITY = 0x0d, + + /** Video */ + LIBUSB_CLASS_VIDEO = 0x0e, + + /** Personal Healthcare */ + LIBUSB_CLASS_PERSONAL_HEALTHCARE = 0x0f, + + /** Diagnostic Device */ + LIBUSB_CLASS_DIAGNOSTIC_DEVICE = 0xdc, + + /** Wireless class */ + LIBUSB_CLASS_WIRELESS = 0xe0, + + /** Application class */ + LIBUSB_CLASS_APPLICATION = 0xfe, + + /** Class is vendor-specific */ + LIBUSB_CLASS_VENDOR_SPEC = 0xff +}; + +/** \ingroup desc + * Descriptor types as defined by the USB specification. */ +enum libusb_descriptor_type { + /** Device descriptor. See libusb_device_descriptor. */ + LIBUSB_DT_DEVICE = 0x01, + + /** Configuration descriptor. See libusb_config_descriptor. */ + LIBUSB_DT_CONFIG = 0x02, + + /** String descriptor */ + LIBUSB_DT_STRING = 0x03, + + /** Interface descriptor. See libusb_interface_descriptor. */ + LIBUSB_DT_INTERFACE = 0x04, + + /** Endpoint descriptor. See libusb_endpoint_descriptor. */ + LIBUSB_DT_ENDPOINT = 0x05, + + /** BOS descriptor */ + LIBUSB_DT_BOS = 0x0f, + + /** Device Capability descriptor */ + LIBUSB_DT_DEVICE_CAPABILITY = 0x10, + + /** HID descriptor */ + LIBUSB_DT_HID = 0x21, + + /** HID report descriptor */ + LIBUSB_DT_REPORT = 0x22, + + /** Physical descriptor */ + LIBUSB_DT_PHYSICAL = 0x23, + + /** Hub descriptor */ + LIBUSB_DT_HUB = 0x29, + + /** SuperSpeed Hub descriptor */ + LIBUSB_DT_SUPERSPEED_HUB = 0x2a, + + /** SuperSpeed Endpoint Companion descriptor */ + LIBUSB_DT_SS_ENDPOINT_COMPANION = 0x30 +}; + +/* Descriptor sizes per descriptor type */ +#define LIBUSB_DT_DEVICE_SIZE 18 +#define LIBUSB_DT_CONFIG_SIZE 9 +#define LIBUSB_DT_INTERFACE_SIZE 9 +#define LIBUSB_DT_ENDPOINT_SIZE 7 +#define LIBUSB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */ +#define LIBUSB_DT_HUB_NONVAR_SIZE 7 +#define LIBUSB_DT_SS_ENDPOINT_COMPANION_SIZE 6 +#define LIBUSB_DT_BOS_SIZE 5 +#define LIBUSB_DT_DEVICE_CAPABILITY_SIZE 3 + +/* BOS descriptor sizes */ +#define LIBUSB_BT_USB_2_0_EXTENSION_SIZE 7 +#define LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE 10 +#define LIBUSB_BT_CONTAINER_ID_SIZE 20 + +/* We unwrap the BOS => define its max size */ +#define LIBUSB_DT_BOS_MAX_SIZE ((LIBUSB_DT_BOS_SIZE) +\ + (LIBUSB_BT_USB_2_0_EXTENSION_SIZE) +\ + (LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE) +\ + (LIBUSB_BT_CONTAINER_ID_SIZE)) + +#define LIBUSB_ENDPOINT_ADDRESS_MASK 0x0f /* in bEndpointAddress */ +#define LIBUSB_ENDPOINT_DIR_MASK 0x80 + +/** \ingroup desc + * Endpoint direction. Values for bit 7 of the + * \ref libusb_endpoint_descriptor::bEndpointAddress "endpoint address" scheme. + */ +enum libusb_endpoint_direction { + /** In: device-to-host */ + LIBUSB_ENDPOINT_IN = 0x80, + + /** Out: host-to-device */ + LIBUSB_ENDPOINT_OUT = 0x00 +}; + +#define LIBUSB_TRANSFER_TYPE_MASK 0x03 /* in bmAttributes */ + +/** \ingroup desc + * Endpoint transfer type. Values for bits 0:1 of the + * \ref libusb_endpoint_descriptor::bmAttributes "endpoint attributes" field. + */ +enum libusb_transfer_type { + /** Control endpoint */ + LIBUSB_TRANSFER_TYPE_CONTROL = 0, + + /** Isochronous endpoint */ + LIBUSB_TRANSFER_TYPE_ISOCHRONOUS = 1, + + /** Bulk endpoint */ + LIBUSB_TRANSFER_TYPE_BULK = 2, + + /** Interrupt endpoint */ + LIBUSB_TRANSFER_TYPE_INTERRUPT = 3, + + /** Stream endpoint */ + LIBUSB_TRANSFER_TYPE_BULK_STREAM = 4, +}; + +/** \ingroup misc + * Standard requests, as defined in table 9-5 of the USB 3.0 specifications */ +enum libusb_standard_request { + /** Request status of the specific recipient */ + LIBUSB_REQUEST_GET_STATUS = 0x00, + + /** Clear or disable a specific feature */ + LIBUSB_REQUEST_CLEAR_FEATURE = 0x01, + + /* 0x02 is reserved */ + + /** Set or enable a specific feature */ + LIBUSB_REQUEST_SET_FEATURE = 0x03, + + /* 0x04 is reserved */ + + /** Set device address for all future accesses */ + LIBUSB_REQUEST_SET_ADDRESS = 0x05, + + /** Get the specified descriptor */ + LIBUSB_REQUEST_GET_DESCRIPTOR = 0x06, + + /** Used to update existing descriptors or add new descriptors */ + LIBUSB_REQUEST_SET_DESCRIPTOR = 0x07, + + /** Get the current device configuration value */ + LIBUSB_REQUEST_GET_CONFIGURATION = 0x08, + + /** Set device configuration */ + LIBUSB_REQUEST_SET_CONFIGURATION = 0x09, + + /** Return the selected alternate setting for the specified interface */ + LIBUSB_REQUEST_GET_INTERFACE = 0x0A, + + /** Select an alternate interface for the specified interface */ + LIBUSB_REQUEST_SET_INTERFACE = 0x0B, + + /** Set then report an endpoint's synchronization frame */ + LIBUSB_REQUEST_SYNCH_FRAME = 0x0C, + + /** Sets both the U1 and U2 Exit Latency */ + LIBUSB_REQUEST_SET_SEL = 0x30, + + /** Delay from the time a host transmits a packet to the time it is + * received by the device. */ + LIBUSB_SET_ISOCH_DELAY = 0x31, +}; + +/** \ingroup misc + * Request type bits of the + * \ref libusb_control_setup::bmRequestType "bmRequestType" field in control + * transfers. */ +enum libusb_request_type { + /** Standard */ + LIBUSB_REQUEST_TYPE_STANDARD = (0x00 << 5), + + /** Class */ + LIBUSB_REQUEST_TYPE_CLASS = (0x01 << 5), + + /** Vendor */ + LIBUSB_REQUEST_TYPE_VENDOR = (0x02 << 5), + + /** Reserved */ + LIBUSB_REQUEST_TYPE_RESERVED = (0x03 << 5) +}; + +/** \ingroup misc + * Recipient bits of the + * \ref libusb_control_setup::bmRequestType "bmRequestType" field in control + * transfers. Values 4 through 31 are reserved. */ +enum libusb_request_recipient { + /** Device */ + LIBUSB_RECIPIENT_DEVICE = 0x00, + + /** Interface */ + LIBUSB_RECIPIENT_INTERFACE = 0x01, + + /** Endpoint */ + LIBUSB_RECIPIENT_ENDPOINT = 0x02, + + /** Other */ + LIBUSB_RECIPIENT_OTHER = 0x03, +}; + +#define LIBUSB_ISO_SYNC_TYPE_MASK 0x0C + +/** \ingroup desc + * Synchronization type for isochronous endpoints. Values for bits 2:3 of the + * \ref libusb_endpoint_descriptor::bmAttributes "bmAttributes" field in + * libusb_endpoint_descriptor. + */ +enum libusb_iso_sync_type { + /** No synchronization */ + LIBUSB_ISO_SYNC_TYPE_NONE = 0, + + /** Asynchronous */ + LIBUSB_ISO_SYNC_TYPE_ASYNC = 1, + + /** Adaptive */ + LIBUSB_ISO_SYNC_TYPE_ADAPTIVE = 2, + + /** Synchronous */ + LIBUSB_ISO_SYNC_TYPE_SYNC = 3 +}; + +#define LIBUSB_ISO_USAGE_TYPE_MASK 0x30 + +/** \ingroup desc + * Usage type for isochronous endpoints. Values for bits 4:5 of the + * \ref libusb_endpoint_descriptor::bmAttributes "bmAttributes" field in + * libusb_endpoint_descriptor. + */ +enum libusb_iso_usage_type { + /** Data endpoint */ + LIBUSB_ISO_USAGE_TYPE_DATA = 0, + + /** Feedback endpoint */ + LIBUSB_ISO_USAGE_TYPE_FEEDBACK = 1, + + /** Implicit feedback Data endpoint */ + LIBUSB_ISO_USAGE_TYPE_IMPLICIT = 2, +}; + +/** \ingroup desc + * A structure representing the standard USB device descriptor. This + * descriptor is documented in section 9.6.1 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_device_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_DEVICE LIBUSB_DT_DEVICE in this + * context. */ + uint8_t bDescriptorType; + + /** USB specification release number in binary-coded decimal. A value of + * 0x0200 indicates USB 2.0, 0x0110 indicates USB 1.1, etc. */ + uint16_t bcdUSB; + + /** USB-IF class code for the device. See \ref libusb_class_code. */ + uint8_t bDeviceClass; + + /** USB-IF subclass code for the device, qualified by the bDeviceClass + * value */ + uint8_t bDeviceSubClass; + + /** USB-IF protocol code for the device, qualified by the bDeviceClass and + * bDeviceSubClass values */ + uint8_t bDeviceProtocol; + + /** Maximum packet size for endpoint 0 */ + uint8_t bMaxPacketSize0; + + /** USB-IF vendor ID */ + uint16_t idVendor; + + /** USB-IF product ID */ + uint16_t idProduct; + + /** Device release number in binary-coded decimal */ + uint16_t bcdDevice; + + /** Index of string descriptor describing manufacturer */ + uint8_t iManufacturer; + + /** Index of string descriptor describing product */ + uint8_t iProduct; + + /** Index of string descriptor containing device serial number */ + uint8_t iSerialNumber; + + /** Number of possible configurations */ + uint8_t bNumConfigurations; +}; + +/** \ingroup desc + * A structure representing the standard USB endpoint descriptor. This + * descriptor is documented in section 9.6.6 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_endpoint_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_ENDPOINT LIBUSB_DT_ENDPOINT in + * this context. */ + uint8_t bDescriptorType; + + /** The address of the endpoint described by this descriptor. Bits 0:3 are + * the endpoint number. Bits 4:6 are reserved. Bit 7 indicates direction, + * see \ref libusb_endpoint_direction. + */ + uint8_t bEndpointAddress; + + /** Attributes which apply to the endpoint when it is configured using + * the bConfigurationValue. Bits 0:1 determine the transfer type and + * correspond to \ref libusb_transfer_type. Bits 2:3 are only used for + * isochronous endpoints and correspond to \ref libusb_iso_sync_type. + * Bits 4:5 are also only used for isochronous endpoints and correspond to + * \ref libusb_iso_usage_type. Bits 6:7 are reserved. + */ + uint8_t bmAttributes; + + /** Maximum packet size this endpoint is capable of sending/receiving. */ + uint16_t wMaxPacketSize; + + /** Interval for polling endpoint for data transfers. */ + uint8_t bInterval; + + /** For audio devices only: the rate at which synchronization feedback + * is provided. */ + uint8_t bRefresh; + + /** For audio devices only: the address if the synch endpoint */ + uint8_t bSynchAddress; + + /** Extra descriptors. If libusb encounters unknown endpoint descriptors, + * it will store them here, should you wish to parse them. */ + const unsigned char *extra; + + /** Length of the extra descriptors, in bytes. */ + int extra_length; +}; + +/** \ingroup desc + * A structure representing the standard USB interface descriptor. This + * descriptor is documented in section 9.6.5 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_interface_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_INTERFACE LIBUSB_DT_INTERFACE + * in this context. */ + uint8_t bDescriptorType; + + /** Number of this interface */ + uint8_t bInterfaceNumber; + + /** Value used to select this alternate setting for this interface */ + uint8_t bAlternateSetting; + + /** Number of endpoints used by this interface (excluding the control + * endpoint). */ + uint8_t bNumEndpoints; + + /** USB-IF class code for this interface. See \ref libusb_class_code. */ + uint8_t bInterfaceClass; + + /** USB-IF subclass code for this interface, qualified by the + * bInterfaceClass value */ + uint8_t bInterfaceSubClass; + + /** USB-IF protocol code for this interface, qualified by the + * bInterfaceClass and bInterfaceSubClass values */ + uint8_t bInterfaceProtocol; + + /** Index of string descriptor describing this interface */ + uint8_t iInterface; + + /** Array of endpoint descriptors. This length of this array is determined + * by the bNumEndpoints field. */ + const struct libusb_endpoint_descriptor *endpoint; + + /** Extra descriptors. If libusb encounters unknown interface descriptors, + * it will store them here, should you wish to parse them. */ + const unsigned char *extra; + + /** Length of the extra descriptors, in bytes. */ + int extra_length; +}; + +/** \ingroup desc + * A collection of alternate settings for a particular USB interface. + */ +struct libusb_interface { + /** Array of interface descriptors. The length of this array is determined + * by the num_altsetting field. */ + const struct libusb_interface_descriptor *altsetting; + + /** The number of alternate settings that belong to this interface */ + int num_altsetting; +}; + +/** \ingroup desc + * A structure representing the standard USB configuration descriptor. This + * descriptor is documented in section 9.6.3 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_config_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_CONFIG LIBUSB_DT_CONFIG + * in this context. */ + uint8_t bDescriptorType; + + /** Total length of data returned for this configuration */ + uint16_t wTotalLength; + + /** Number of interfaces supported by this configuration */ + uint8_t bNumInterfaces; + + /** Identifier value for this configuration */ + uint8_t bConfigurationValue; + + /** Index of string descriptor describing this configuration */ + uint8_t iConfiguration; + + /** Configuration characteristics */ + uint8_t bmAttributes; + + /** Maximum power consumption of the USB device from this bus in this + * configuration when the device is fully opreation. Expressed in units + * of 2 mA. */ + uint8_t MaxPower; + + /** Array of interfaces supported by this configuration. The length of + * this array is determined by the bNumInterfaces field. */ + const struct libusb_interface *interface; + + /** Extra descriptors. If libusb encounters unknown configuration + * descriptors, it will store them here, should you wish to parse them. */ + const unsigned char *extra; + + /** Length of the extra descriptors, in bytes. */ + int extra_length; +}; + +/** \ingroup desc + * A structure representing the superspeed endpoint companion + * descriptor. This descriptor is documented in section 9.6.7 of + * the USB 3.0 specification. All multiple-byte fields are represented in + * host-endian format. + */ +struct libusb_ss_endpoint_companion_descriptor { + + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_SS_ENDPOINT_COMPANION in + * this context. */ + uint8_t bDescriptorType; + + + /** The maximum number of packets the endpoint can send or + * recieve as part of a burst. */ + uint8_t bMaxBurst; + + /** In bulk EP: bits 4:0 represents the maximum number of + * streams the EP supports. In isochronous EP: bits 1:0 + * represents the Mult - a zero based value that determines + * the maximum number of packets within a service interval */ + uint8_t bmAttributes; + + /** The total number of bytes this EP will transfer every + * service interval. valid only for periodic EPs. */ + uint16_t wBytesPerInterval; +}; + +/** \ingroup desc + * A generic representation of a BOS Device Capability descriptor. It is + * advised to check bDevCapabilityType and call the matching + * libusb_get_*_descriptor function to get a structure fully matching the type. + */ +struct libusb_bos_dev_capability_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY + * LIBUSB_DT_DEVICE_CAPABILITY in this context. */ + uint8_t bDescriptorType; + /** Device Capability type */ + uint8_t bDevCapabilityType; + /** Device Capability data (bLength - 3 bytes) */ + uint8_t dev_capability_data +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) + [] /* valid C99 code */ +#else + [0] /* non-standard, but usually working code */ +#endif + ; +}; + +/** \ingroup desc + * A structure representing the Binary Device Object Store (BOS) descriptor. + * This descriptor is documented in section 9.6.2 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_bos_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_BOS LIBUSB_DT_BOS + * in this context. */ + uint8_t bDescriptorType; + + /** Length of this descriptor and all of its sub descriptors */ + uint16_t wTotalLength; + + /** The number of separate device capability descriptors in + * the BOS */ + uint8_t bNumDeviceCaps; + + /** bNumDeviceCap Device Capability Descriptors */ + struct libusb_bos_dev_capability_descriptor *dev_capability +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) + [] /* valid C99 code */ +#else + [0] /* non-standard, but usually working code */ +#endif + ; +}; + +/** \ingroup desc + * A structure representing the USB 2.0 Extension descriptor + * This descriptor is documented in section 9.6.2.1 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_usb_2_0_extension_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY + * LIBUSB_DT_DEVICE_CAPABILITY in this context. */ + uint8_t bDescriptorType; + + /** Capability type. Will have value + * \ref libusb_capability_type::LIBUSB_BT_USB_2_0_EXTENSION + * LIBUSB_BT_USB_2_0_EXTENSION in this context. */ + uint8_t bDevCapabilityType; + + /** Bitmap encoding of supported device level features. + * A value of one in a bit location indicates a feature is + * supported; a value of zero indicates it is not supported. + * See \ref libusb_usb_2_0_extension_attributes. */ + uint32_t bmAttributes; +}; + +/** \ingroup desc + * A structure representing the SuperSpeed USB Device Capability descriptor + * This descriptor is documented in section 9.6.2.2 of the USB 3.0 specification. + * All multiple-byte fields are represented in host-endian format. + */ +struct libusb_ss_usb_device_capability_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY + * LIBUSB_DT_DEVICE_CAPABILITY in this context. */ + uint8_t bDescriptorType; + + /** Capability type. Will have value + * \ref libusb_capability_type::LIBUSB_BT_SS_USB_DEVICE_CAPABILITY + * LIBUSB_BT_SS_USB_DEVICE_CAPABILITY in this context. */ + uint8_t bDevCapabilityType; + + /** Bitmap encoding of supported device level features. + * A value of one in a bit location indicates a feature is + * supported; a value of zero indicates it is not supported. + * See \ref libusb_ss_usb_device_capability_attributes. */ + uint8_t bmAttributes; + + /** Bitmap encoding of the speed supported by this device when + * operating in SuperSpeed mode. See \ref libusb_supported_speed. */ + uint16_t wSpeedSupported; + + /** The lowest speed at which all the functionality supported + * by the device is available to the user. For example if the + * device supports all its functionality when connected at + * full speed and above then it sets this value to 1. */ + uint8_t bFunctionalitySupport; + + /** U1 Device Exit Latency. */ + uint8_t bU1DevExitLat; + + /** U2 Device Exit Latency. */ + uint16_t bU2DevExitLat; +}; + +/** \ingroup desc + * A structure representing the Container ID descriptor. + * This descriptor is documented in section 9.6.2.3 of the USB 3.0 specification. + * All multiple-byte fields, except UUIDs, are represented in host-endian format. + */ +struct libusb_container_id_descriptor { + /** Size of this descriptor (in bytes) */ + uint8_t bLength; + + /** Descriptor type. Will have value + * \ref libusb_descriptor_type::LIBUSB_DT_DEVICE_CAPABILITY + * LIBUSB_DT_DEVICE_CAPABILITY in this context. */ + uint8_t bDescriptorType; + + /** Capability type. Will have value + * \ref libusb_capability_type::LIBUSB_BT_CONTAINER_ID + * LIBUSB_BT_CONTAINER_ID in this context. */ + uint8_t bDevCapabilityType; + + /** Reserved field */ + uint8_t bReserved; + + /** 128 bit UUID */ + uint8_t ContainerID[16]; +}; + +/** \ingroup asyncio + * Setup packet for control transfers. */ +struct libusb_control_setup { + /** Request type. Bits 0:4 determine recipient, see + * \ref libusb_request_recipient. Bits 5:6 determine type, see + * \ref libusb_request_type. Bit 7 determines data transfer direction, see + * \ref libusb_endpoint_direction. + */ + uint8_t bmRequestType; + + /** Request. If the type bits of bmRequestType are equal to + * \ref libusb_request_type::LIBUSB_REQUEST_TYPE_STANDARD + * "LIBUSB_REQUEST_TYPE_STANDARD" then this field refers to + * \ref libusb_standard_request. For other cases, use of this field is + * application-specific. */ + uint8_t bRequest; + + /** Value. Varies according to request */ + uint16_t wValue; + + /** Index. Varies according to request, typically used to pass an index + * or offset */ + uint16_t wIndex; + + /** Number of bytes to transfer */ + uint16_t wLength; +}; + +#define LIBUSB_CONTROL_SETUP_SIZE (sizeof(struct libusb_control_setup)) + +/* libusb */ + +struct libusb_context; +struct libusb_device; +struct libusb_device_handle; +struct libusb_hotplug_callback; + +/** \ingroup lib + * Structure providing the version of the libusb runtime + */ +struct libusb_version { + /** Library major version. */ + const uint16_t major; + + /** Library minor version. */ + const uint16_t minor; + + /** Library micro version. */ + const uint16_t micro; + + /** Library nano version. */ + const uint16_t nano; + + /** Library release candidate suffix string, e.g. "-rc4". */ + const char *rc; + + /** For ABI compatibility only. */ + const char* describe; +}; + +/** \ingroup lib + * Structure representing a libusb session. The concept of individual libusb + * sessions allows for your program to use two libraries (or dynamically + * load two modules) which both independently use libusb. This will prevent + * interference between the individual libusb users - for example + * libusb_set_debug() will not affect the other user of the library, and + * libusb_exit() will not destroy resources that the other user is still + * using. + * + * Sessions are created by libusb_init() and destroyed through libusb_exit(). + * If your application is guaranteed to only ever include a single libusb + * user (i.e. you), you do not have to worry about contexts: pass NULL in + * every function call where a context is required. The default context + * will be used. + * + * For more information, see \ref contexts. + */ +typedef struct libusb_context libusb_context; + +/** \ingroup dev + * Structure representing a USB device detected on the system. This is an + * opaque type for which you are only ever provided with a pointer, usually + * originating from libusb_get_device_list(). + * + * Certain operations can be performed on a device, but in order to do any + * I/O you will have to first obtain a device handle using libusb_open(). + * + * Devices are reference counted with libusb_ref_device() and + * libusb_unref_device(), and are freed when the reference count reaches 0. + * New devices presented by libusb_get_device_list() have a reference count of + * 1, and libusb_free_device_list() can optionally decrease the reference count + * on all devices in the list. libusb_open() adds another reference which is + * later destroyed by libusb_close(). + */ +typedef struct libusb_device libusb_device; + + +/** \ingroup dev + * Structure representing a handle on a USB device. This is an opaque type for + * which you are only ever provided with a pointer, usually originating from + * libusb_open(). + * + * A device handle is used to perform I/O and other operations. When finished + * with a device handle, you should call libusb_close(). + */ +typedef struct libusb_device_handle libusb_device_handle; + +/** \ingroup dev + * Speed codes. Indicates the speed at which the device is operating. + */ +enum libusb_speed { + /** The OS doesn't report or know the device speed. */ + LIBUSB_SPEED_UNKNOWN = 0, + + /** The device is operating at low speed (1.5MBit/s). */ + LIBUSB_SPEED_LOW = 1, + + /** The device is operating at full speed (12MBit/s). */ + LIBUSB_SPEED_FULL = 2, + + /** The device is operating at high speed (480MBit/s). */ + LIBUSB_SPEED_HIGH = 3, + + /** The device is operating at super speed (5000MBit/s). */ + LIBUSB_SPEED_SUPER = 4, +}; + +/** \ingroup dev + * Supported speeds (wSpeedSupported) bitfield. Indicates what + * speeds the device supports. + */ +enum libusb_supported_speed { + /** Low speed operation supported (1.5MBit/s). */ + LIBUSB_LOW_SPEED_OPERATION = 1, + + /** Full speed operation supported (12MBit/s). */ + LIBUSB_FULL_SPEED_OPERATION = 2, + + /** High speed operation supported (480MBit/s). */ + LIBUSB_HIGH_SPEED_OPERATION = 4, + + /** Superspeed operation supported (5000MBit/s). */ + LIBUSB_SUPER_SPEED_OPERATION = 8, +}; + +/** \ingroup dev + * Masks for the bits of the + * \ref libusb_usb_2_0_extension_descriptor::bmAttributes "bmAttributes" field + * of the USB 2.0 Extension descriptor. + */ +enum libusb_usb_2_0_extension_attributes { + /** Supports Link Power Management (LPM) */ + LIBUSB_BM_LPM_SUPPORT = 2, +}; + +/** \ingroup dev + * Masks for the bits of the + * \ref libusb_ss_usb_device_capability_descriptor::bmAttributes "bmAttributes" field + * field of the SuperSpeed USB Device Capability descriptor. + */ +enum libusb_ss_usb_device_capability_attributes { + /** Supports Latency Tolerance Messages (LTM) */ + LIBUSB_BM_LTM_SUPPORT = 2, +}; + +/** \ingroup dev + * USB capability types + */ +enum libusb_bos_type { + /** Wireless USB device capability */ + LIBUSB_BT_WIRELESS_USB_DEVICE_CAPABILITY = 1, + + /** USB 2.0 extensions */ + LIBUSB_BT_USB_2_0_EXTENSION = 2, + + /** SuperSpeed USB device capability */ + LIBUSB_BT_SS_USB_DEVICE_CAPABILITY = 3, + + /** Container ID type */ + LIBUSB_BT_CONTAINER_ID = 4, +}; + +/** \ingroup misc + * Error codes. Most libusb functions return 0 on success or one of these + * codes on failure. + * You can call libusb_error_name() to retrieve a string representation of an + * error code or libusb_strerror() to get an end-user suitable description of + * an error code. + */ +enum libusb_error { + /** Success (no error) */ + LIBUSB_SUCCESS = 0, + + /** Input/output error */ + LIBUSB_ERROR_IO = -1, + + /** Invalid parameter */ + LIBUSB_ERROR_INVALID_PARAM = -2, + + /** Access denied (insufficient permissions) */ + LIBUSB_ERROR_ACCESS = -3, + + /** No such device (it may have been disconnected) */ + LIBUSB_ERROR_NO_DEVICE = -4, + + /** Entity not found */ + LIBUSB_ERROR_NOT_FOUND = -5, + + /** Resource busy */ + LIBUSB_ERROR_BUSY = -6, + + /** Operation timed out */ + LIBUSB_ERROR_TIMEOUT = -7, + + /** Overflow */ + LIBUSB_ERROR_OVERFLOW = -8, + + /** Pipe error */ + LIBUSB_ERROR_PIPE = -9, + + /** System call interrupted (perhaps due to signal) */ + LIBUSB_ERROR_INTERRUPTED = -10, + + /** Insufficient memory */ + LIBUSB_ERROR_NO_MEM = -11, + + /** Operation not supported or unimplemented on this platform */ + LIBUSB_ERROR_NOT_SUPPORTED = -12, + + /* NB: Remember to update LIBUSB_ERROR_COUNT below as well as the + message strings in strerror.c when adding new error codes here. */ + + /** Other error */ + LIBUSB_ERROR_OTHER = -99, +}; + +/* Total number of error codes in enum libusb_error */ +#define LIBUSB_ERROR_COUNT 14 + +/** \ingroup asyncio + * Transfer status codes */ +enum libusb_transfer_status { + /** Transfer completed without error. Note that this does not indicate + * that the entire amount of requested data was transferred. */ + LIBUSB_TRANSFER_COMPLETED, + + /** Transfer failed */ + LIBUSB_TRANSFER_ERROR, + + /** Transfer timed out */ + LIBUSB_TRANSFER_TIMED_OUT, + + /** Transfer was cancelled */ + LIBUSB_TRANSFER_CANCELLED, + + /** For bulk/interrupt endpoints: halt condition detected (endpoint + * stalled). For control endpoints: control request not supported. */ + LIBUSB_TRANSFER_STALL, + + /** Device was disconnected */ + LIBUSB_TRANSFER_NO_DEVICE, + + /** Device sent more data than requested */ + LIBUSB_TRANSFER_OVERFLOW, + + /* NB! Remember to update libusb_error_name() + when adding new status codes here. */ +}; + +/** \ingroup asyncio + * libusb_transfer.flags values */ +enum libusb_transfer_flags { + /** Report short frames as errors */ + LIBUSB_TRANSFER_SHORT_NOT_OK = 1<<0, + + /** Automatically free() transfer buffer during libusb_free_transfer() */ + LIBUSB_TRANSFER_FREE_BUFFER = 1<<1, + + /** Automatically call libusb_free_transfer() after callback returns. + * If this flag is set, it is illegal to call libusb_free_transfer() + * from your transfer callback, as this will result in a double-free + * when this flag is acted upon. */ + LIBUSB_TRANSFER_FREE_TRANSFER = 1<<2, + + /** Terminate transfers that are a multiple of the endpoint's + * wMaxPacketSize with an extra zero length packet. This is useful + * when a device protocol mandates that each logical request is + * terminated by an incomplete packet (i.e. the logical requests are + * not separated by other means). + * + * This flag only affects host-to-device transfers to bulk and interrupt + * endpoints. In other situations, it is ignored. + * + * This flag only affects transfers with a length that is a multiple of + * the endpoint's wMaxPacketSize. On transfers of other lengths, this + * flag has no effect. Therefore, if you are working with a device that + * needs a ZLP whenever the end of the logical request falls on a packet + * boundary, then it is sensible to set this flag on <em>every</em> + * transfer (you do not have to worry about only setting it on transfers + * that end on the boundary). + * + * This flag is currently only supported on Linux. + * On other systems, libusb_submit_transfer() will return + * LIBUSB_ERROR_NOT_SUPPORTED for every transfer where this flag is set. + * + * Available since libusb-1.0.9. + */ + LIBUSB_TRANSFER_ADD_ZERO_PACKET = 1 << 3, +}; + +/** \ingroup asyncio + * Isochronous packet descriptor. */ +struct libusb_iso_packet_descriptor { + /** Length of data to request in this packet */ + unsigned int length; + + /** Amount of data that was actually transferred */ + unsigned int actual_length; + + /** Status code for this packet */ + enum libusb_transfer_status status; +}; + +struct libusb_transfer; + +/** \ingroup asyncio + * Asynchronous transfer callback function type. When submitting asynchronous + * transfers, you pass a pointer to a callback function of this type via the + * \ref libusb_transfer::callback "callback" member of the libusb_transfer + * structure. libusb will call this function later, when the transfer has + * completed or failed. See \ref asyncio for more information. + * \param transfer The libusb_transfer struct the callback function is being + * notified about. + */ +typedef void (LIBUSB_CALL *libusb_transfer_cb_fn)(struct libusb_transfer *transfer); + +/** \ingroup asyncio + * The generic USB transfer structure. The user populates this structure and + * then submits it in order to request a transfer. After the transfer has + * completed, the library populates the transfer with the results and passes + * it back to the user. + */ +struct libusb_transfer { + /** Handle of the device that this transfer will be submitted to */ + libusb_device_handle *dev_handle; + + /** A bitwise OR combination of \ref libusb_transfer_flags. */ + uint8_t flags; + + /** Address of the endpoint where this transfer will be sent. */ + unsigned char endpoint; + + /** Type of the endpoint from \ref libusb_transfer_type */ + unsigned char type; + + /** Timeout for this transfer in millseconds. A value of 0 indicates no + * timeout. */ + unsigned int timeout; + + /** The status of the transfer. Read-only, and only for use within + * transfer callback function. + * + * If this is an isochronous transfer, this field may read COMPLETED even + * if there were errors in the frames. Use the + * \ref libusb_iso_packet_descriptor::status "status" field in each packet + * to determine if errors occurred. */ + enum libusb_transfer_status status; + + /** Length of the data buffer */ + int length; + + /** Actual length of data that was transferred. Read-only, and only for + * use within transfer callback function. Not valid for isochronous + * endpoint transfers. */ + int actual_length; + + /** Callback function. This will be invoked when the transfer completes, + * fails, or is cancelled. */ + libusb_transfer_cb_fn callback; + + /** User context data to pass to the callback function. */ + void *user_data; + + /** Data buffer */ + unsigned char *buffer; + + /** Number of isochronous packets. Only used for I/O with isochronous + * endpoints. */ + int num_iso_packets; + + /** Isochronous packet descriptors, for isochronous transfers only. */ + struct libusb_iso_packet_descriptor iso_packet_desc +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) + [] /* valid C99 code */ +#else + [0] /* non-standard, but usually working code */ +#endif + ; +}; + +/** \ingroup misc + * Capabilities supported by an instance of libusb on the current running + * platform. Test if the loaded library supports a given capability by calling + * \ref libusb_has_capability(). + */ +enum libusb_capability { + /** The libusb_has_capability() API is available. */ + LIBUSB_CAP_HAS_CAPABILITY = 0x0000, + /** Hotplug support is available on this platform. */ + LIBUSB_CAP_HAS_HOTPLUG = 0x0001, + /** The library can access HID devices without requiring user intervention. + * Note that before being able to actually access an HID device, you may + * still have to call additional libusb functions such as + * \ref libusb_detach_kernel_driver(). */ + LIBUSB_CAP_HAS_HID_ACCESS = 0x0100, + /** The library supports detaching of the default USB driver, using + * \ref libusb_detach_kernel_driver(), if one is set by the OS kernel */ + LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER = 0x0101 +}; + +/** \ingroup lib + * Log message levels. + * - LIBUSB_LOG_LEVEL_NONE (0) : no messages ever printed by the library (default) + * - LIBUSB_LOG_LEVEL_ERROR (1) : error messages are printed to stderr + * - LIBUSB_LOG_LEVEL_WARNING (2) : warning and error messages are printed to stderr + * - LIBUSB_LOG_LEVEL_INFO (3) : informational messages are printed to stdout, warning + * and error messages are printed to stderr + * - LIBUSB_LOG_LEVEL_DEBUG (4) : debug and informational messages are printed to stdout, + * warnings and errors to stderr + */ +enum libusb_log_level { + LIBUSB_LOG_LEVEL_NONE = 0, + LIBUSB_LOG_LEVEL_ERROR, + LIBUSB_LOG_LEVEL_WARNING, + LIBUSB_LOG_LEVEL_INFO, + LIBUSB_LOG_LEVEL_DEBUG, +}; + +int LIBUSB_CALL libusb_init(libusb_context **ctx); +void LIBUSB_CALL libusb_exit(libusb_context *ctx); +void LIBUSB_CALL libusb_set_debug(libusb_context *ctx, int level); +const struct libusb_version * LIBUSB_CALL libusb_get_version(void); +int LIBUSB_CALL libusb_has_capability(uint32_t capability); +const char * LIBUSB_CALL libusb_error_name(int errcode); +int LIBUSB_CALL libusb_setlocale(const char *locale); +const char * LIBUSB_CALL libusb_strerror(enum libusb_error errcode); + +ssize_t LIBUSB_CALL libusb_get_device_list(libusb_context *ctx, + libusb_device ***list); +void LIBUSB_CALL libusb_free_device_list(libusb_device **list, + int unref_devices); +libusb_device * LIBUSB_CALL libusb_ref_device(libusb_device *dev); +void LIBUSB_CALL libusb_unref_device(libusb_device *dev); + +int LIBUSB_CALL libusb_get_configuration(libusb_device_handle *dev, + int *config); +int LIBUSB_CALL libusb_get_device_descriptor(libusb_device *dev, + struct libusb_device_descriptor *desc); +int LIBUSB_CALL libusb_get_active_config_descriptor(libusb_device *dev, + struct libusb_config_descriptor **config); +int LIBUSB_CALL libusb_get_config_descriptor(libusb_device *dev, + uint8_t config_index, struct libusb_config_descriptor **config); +int LIBUSB_CALL libusb_get_config_descriptor_by_value(libusb_device *dev, + uint8_t bConfigurationValue, struct libusb_config_descriptor **config); +void LIBUSB_CALL libusb_free_config_descriptor( + struct libusb_config_descriptor *config); +int LIBUSB_CALL libusb_get_ss_endpoint_companion_descriptor( + struct libusb_context *ctx, + const struct libusb_endpoint_descriptor *endpoint, + struct libusb_ss_endpoint_companion_descriptor **ep_comp); +void LIBUSB_CALL libusb_free_ss_endpoint_companion_descriptor( + struct libusb_ss_endpoint_companion_descriptor *ep_comp); +int LIBUSB_CALL libusb_get_bos_descriptor(libusb_device_handle *handle, + struct libusb_bos_descriptor **bos); +void LIBUSB_CALL libusb_free_bos_descriptor(struct libusb_bos_descriptor *bos); +int LIBUSB_CALL libusb_get_usb_2_0_extension_descriptor( + struct libusb_context *ctx, + struct libusb_bos_dev_capability_descriptor *dev_cap, + struct libusb_usb_2_0_extension_descriptor **usb_2_0_extension); +void LIBUSB_CALL libusb_free_usb_2_0_extension_descriptor( + struct libusb_usb_2_0_extension_descriptor *usb_2_0_extension); +int LIBUSB_CALL libusb_get_ss_usb_device_capability_descriptor( + struct libusb_context *ctx, + struct libusb_bos_dev_capability_descriptor *dev_cap, + struct libusb_ss_usb_device_capability_descriptor **ss_usb_device_cap); +void LIBUSB_CALL libusb_free_ss_usb_device_capability_descriptor( + struct libusb_ss_usb_device_capability_descriptor *ss_usb_device_cap); +int LIBUSB_CALL libusb_get_container_id_descriptor(struct libusb_context *ctx, + struct libusb_bos_dev_capability_descriptor *dev_cap, + struct libusb_container_id_descriptor **container_id); +void LIBUSB_CALL libusb_free_container_id_descriptor( + struct libusb_container_id_descriptor *container_id); +uint8_t LIBUSB_CALL libusb_get_bus_number(libusb_device *dev); +uint8_t LIBUSB_CALL libusb_get_port_number(libusb_device *dev); +int LIBUSB_CALL libusb_get_port_numbers(libusb_device *dev, uint8_t* port_numbers, int port_numbers_len); +LIBUSB_DEPRECATED_FOR(libusb_get_port_numbers) +int LIBUSB_CALL libusb_get_port_path(libusb_context *ctx, libusb_device *dev, uint8_t* path, uint8_t path_length); +libusb_device * LIBUSB_CALL libusb_get_parent(libusb_device *dev); +uint8_t LIBUSB_CALL libusb_get_device_address(libusb_device *dev); +int LIBUSB_CALL libusb_get_device_speed(libusb_device *dev); +int LIBUSB_CALL libusb_get_max_packet_size(libusb_device *dev, + unsigned char endpoint); +int LIBUSB_CALL libusb_get_max_iso_packet_size(libusb_device *dev, + unsigned char endpoint); + +int LIBUSB_CALL libusb_open(libusb_device *dev, libusb_device_handle **handle); +void LIBUSB_CALL libusb_close(libusb_device_handle *dev_handle); +libusb_device * LIBUSB_CALL libusb_get_device(libusb_device_handle *dev_handle); + +int LIBUSB_CALL libusb_set_configuration(libusb_device_handle *dev, + int configuration); +int LIBUSB_CALL libusb_claim_interface(libusb_device_handle *dev, + int interface_number); +int LIBUSB_CALL libusb_release_interface(libusb_device_handle *dev, + int interface_number); + +libusb_device_handle * LIBUSB_CALL libusb_open_device_with_vid_pid( + libusb_context *ctx, uint16_t vendor_id, uint16_t product_id); + +int LIBUSB_CALL libusb_set_interface_alt_setting(libusb_device_handle *dev, + int interface_number, int alternate_setting); +int LIBUSB_CALL libusb_clear_halt(libusb_device_handle *dev, + unsigned char endpoint); +int LIBUSB_CALL libusb_reset_device(libusb_device_handle *dev); + +int LIBUSB_CALL libusb_alloc_streams(libusb_device_handle *dev, + uint32_t num_streams, unsigned char *endpoints, int num_endpoints); +int LIBUSB_CALL libusb_free_streams(libusb_device_handle *dev, + unsigned char *endpoints, int num_endpoints); + +int LIBUSB_CALL libusb_kernel_driver_active(libusb_device_handle *dev, + int interface_number); +int LIBUSB_CALL libusb_detach_kernel_driver(libusb_device_handle *dev, + int interface_number); +int LIBUSB_CALL libusb_attach_kernel_driver(libusb_device_handle *dev, + int interface_number); +int LIBUSB_CALL libusb_set_auto_detach_kernel_driver( + libusb_device_handle *dev, int enable); + +/* async I/O */ + +/** \ingroup asyncio + * Get the data section of a control transfer. This convenience function is here + * to remind you that the data does not start until 8 bytes into the actual + * buffer, as the setup packet comes first. + * + * Calling this function only makes sense from a transfer callback function, + * or situations where you have already allocated a suitably sized buffer at + * transfer->buffer. + * + * \param transfer a transfer + * \returns pointer to the first byte of the data section + */ +static inline unsigned char *libusb_control_transfer_get_data( + struct libusb_transfer *transfer) +{ + return transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE; +} + +/** \ingroup asyncio + * Get the control setup packet of a control transfer. This convenience + * function is here to remind you that the control setup occupies the first + * 8 bytes of the transfer data buffer. + * + * Calling this function only makes sense from a transfer callback function, + * or situations where you have already allocated a suitably sized buffer at + * transfer->buffer. + * + * \param transfer a transfer + * \returns a casted pointer to the start of the transfer data buffer + */ +static inline struct libusb_control_setup *libusb_control_transfer_get_setup( + struct libusb_transfer *transfer) +{ + return (struct libusb_control_setup *)(void *) transfer->buffer; +} + +/** \ingroup asyncio + * Helper function to populate the setup packet (first 8 bytes of the data + * buffer) for a control transfer. The wIndex, wValue and wLength values should + * be given in host-endian byte order. + * + * \param buffer buffer to output the setup packet into + * This pointer must be aligned to at least 2 bytes boundary. + * \param bmRequestType see the + * \ref libusb_control_setup::bmRequestType "bmRequestType" field of + * \ref libusb_control_setup + * \param bRequest see the + * \ref libusb_control_setup::bRequest "bRequest" field of + * \ref libusb_control_setup + * \param wValue see the + * \ref libusb_control_setup::wValue "wValue" field of + * \ref libusb_control_setup + * \param wIndex see the + * \ref libusb_control_setup::wIndex "wIndex" field of + * \ref libusb_control_setup + * \param wLength see the + * \ref libusb_control_setup::wLength "wLength" field of + * \ref libusb_control_setup + */ +static inline void libusb_fill_control_setup(unsigned char *buffer, + uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, + uint16_t wLength) +{ + struct libusb_control_setup *setup = (struct libusb_control_setup *)(void *) buffer; + setup->bmRequestType = bmRequestType; + setup->bRequest = bRequest; + setup->wValue = libusb_cpu_to_le16(wValue); + setup->wIndex = libusb_cpu_to_le16(wIndex); + setup->wLength = libusb_cpu_to_le16(wLength); +} + +struct libusb_transfer * LIBUSB_CALL libusb_alloc_transfer(int iso_packets); +int LIBUSB_CALL libusb_submit_transfer(struct libusb_transfer *transfer); +int LIBUSB_CALL libusb_cancel_transfer(struct libusb_transfer *transfer); +void LIBUSB_CALL libusb_free_transfer(struct libusb_transfer *transfer); +void LIBUSB_CALL libusb_transfer_set_stream_id( + struct libusb_transfer *transfer, uint32_t stream_id); +uint32_t LIBUSB_CALL libusb_transfer_get_stream_id( + struct libusb_transfer *transfer); + +/** \ingroup asyncio + * Helper function to populate the required \ref libusb_transfer fields + * for a control transfer. + * + * If you pass a transfer buffer to this function, the first 8 bytes will + * be interpreted as a control setup packet, and the wLength field will be + * used to automatically populate the \ref libusb_transfer::length "length" + * field of the transfer. Therefore the recommended approach is: + * -# Allocate a suitably sized data buffer (including space for control setup) + * -# Call libusb_fill_control_setup() + * -# If this is a host-to-device transfer with a data stage, put the data + * in place after the setup packet + * -# Call this function + * -# Call libusb_submit_transfer() + * + * It is also legal to pass a NULL buffer to this function, in which case this + * function will not attempt to populate the length field. Remember that you + * must then populate the buffer and length fields later. + * + * \param transfer the transfer to populate + * \param dev_handle handle of the device that will handle the transfer + * \param buffer data buffer. If provided, this function will interpret the + * first 8 bytes as a setup packet and infer the transfer length from that. + * This pointer must be aligned to at least 2 bytes boundary. + * \param callback callback function to be invoked on transfer completion + * \param user_data user data to pass to callback function + * \param timeout timeout for the transfer in milliseconds + */ +static inline 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) +{ + struct libusb_control_setup *setup = (struct libusb_control_setup *)(void *) buffer; + transfer->dev_handle = dev_handle; + transfer->endpoint = 0; + transfer->type = LIBUSB_TRANSFER_TYPE_CONTROL; + transfer->timeout = timeout; + transfer->buffer = buffer; + if (setup) + transfer->length = (int) (LIBUSB_CONTROL_SETUP_SIZE + + libusb_le16_to_cpu(setup->wLength)); + transfer->user_data = user_data; + transfer->callback = callback; +} + +/** \ingroup asyncio + * Helper function to populate the required \ref libusb_transfer fields + * for a bulk transfer. + * + * \param transfer the transfer to populate + * \param dev_handle handle of the device that will handle the transfer + * \param endpoint address of the endpoint where this transfer will be sent + * \param buffer data buffer + * \param length length of data buffer + * \param callback callback function to be invoked on transfer completion + * \param user_data user data to pass to callback function + * \param timeout timeout for the transfer in milliseconds + */ +static inline 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) +{ + transfer->dev_handle = dev_handle; + transfer->endpoint = endpoint; + transfer->type = LIBUSB_TRANSFER_TYPE_BULK; + transfer->timeout = timeout; + transfer->buffer = buffer; + transfer->length = length; + transfer->user_data = user_data; + transfer->callback = callback; +} + +/** \ingroup asyncio + * Helper function to populate the required \ref libusb_transfer fields + * for a bulk transfer using bulk streams. + * + * Since version 1.0.19, \ref LIBUSB_API_VERSION >= 0x01000103 + * + * \param transfer the transfer to populate + * \param dev_handle handle of the device that will handle the transfer + * \param endpoint address of the endpoint where this transfer will be sent + * \param stream_id bulk stream id for this transfer + * \param buffer data buffer + * \param length length of data buffer + * \param callback callback function to be invoked on transfer completion + * \param user_data user data to pass to callback function + * \param timeout timeout for the transfer in milliseconds + */ +static inline 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) +{ + libusb_fill_bulk_transfer(transfer, dev_handle, endpoint, buffer, + length, callback, user_data, timeout); + transfer->type = LIBUSB_TRANSFER_TYPE_BULK_STREAM; + libusb_transfer_set_stream_id(transfer, stream_id); +} + +/** \ingroup asyncio + * Helper function to populate the required \ref libusb_transfer fields + * for an interrupt transfer. + * + * \param transfer the transfer to populate + * \param dev_handle handle of the device that will handle the transfer + * \param endpoint address of the endpoint where this transfer will be sent + * \param buffer data buffer + * \param length length of data buffer + * \param callback callback function to be invoked on transfer completion + * \param user_data user data to pass to callback function + * \param timeout timeout for the transfer in milliseconds + */ +static inline 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) +{ + transfer->dev_handle = dev_handle; + transfer->endpoint = endpoint; + transfer->type = LIBUSB_TRANSFER_TYPE_INTERRUPT; + transfer->timeout = timeout; + transfer->buffer = buffer; + transfer->length = length; + transfer->user_data = user_data; + transfer->callback = callback; +} + +/** \ingroup asyncio + * Helper function to populate the required \ref libusb_transfer fields + * for an isochronous transfer. + * + * \param transfer the transfer to populate + * \param dev_handle handle of the device that will handle the transfer + * \param endpoint address of the endpoint where this transfer will be sent + * \param buffer data buffer + * \param length length of data buffer + * \param num_iso_packets the number of isochronous packets + * \param callback callback function to be invoked on transfer completion + * \param user_data user data to pass to callback function + * \param timeout timeout for the transfer in milliseconds + */ +static inline 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) +{ + transfer->dev_handle = dev_handle; + transfer->endpoint = endpoint; + transfer->type = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS; + transfer->timeout = timeout; + transfer->buffer = buffer; + transfer->length = length; + transfer->num_iso_packets = num_iso_packets; + transfer->user_data = user_data; + transfer->callback = callback; +} + +/** \ingroup asyncio + * Convenience function to set the length of all packets in an isochronous + * transfer, based on the num_iso_packets field in the transfer structure. + * + * \param transfer a transfer + * \param length the length to set in each isochronous packet descriptor + * \see libusb_get_max_packet_size() + */ +static inline void libusb_set_iso_packet_lengths( + struct libusb_transfer *transfer, unsigned int length) +{ + int i; + for (i = 0; i < transfer->num_iso_packets; i++) + transfer->iso_packet_desc[i].length = length; +} + +/** \ingroup asyncio + * Convenience function to locate the position of an isochronous packet + * within the buffer of an isochronous transfer. + * + * This is a thorough function which loops through all preceding packets, + * accumulating their lengths to find the position of the specified packet. + * Typically you will assign equal lengths to each packet in the transfer, + * and hence the above method is sub-optimal. You may wish to use + * libusb_get_iso_packet_buffer_simple() instead. + * + * \param transfer a transfer + * \param packet the packet to return the address of + * \returns the base address of the packet buffer inside the transfer buffer, + * or NULL if the packet does not exist. + * \see libusb_get_iso_packet_buffer_simple() + */ +static inline unsigned char *libusb_get_iso_packet_buffer( + struct libusb_transfer *transfer, unsigned int packet) +{ + int i; + size_t offset = 0; + int _packet; + + /* oops..slight bug in the API. packet is an unsigned int, but we use + * signed integers almost everywhere else. range-check and convert to + * signed to avoid compiler warnings. FIXME for libusb-2. */ + if (packet > INT_MAX) + return NULL; + _packet = (int) packet; + + if (_packet >= transfer->num_iso_packets) + return NULL; + + for (i = 0; i < _packet; i++) + offset += transfer->iso_packet_desc[i].length; + + return transfer->buffer + offset; +} + +/** \ingroup asyncio + * Convenience function to locate the position of an isochronous packet + * within the buffer of an isochronous transfer, for transfers where each + * packet is of identical size. + * + * This function relies on the assumption that every packet within the transfer + * is of identical size to the first packet. Calculating the location of + * the packet buffer is then just a simple calculation: + * <tt>buffer + (packet_size * packet)</tt> + * + * Do not use this function on transfers other than those that have identical + * packet lengths for each packet. + * + * \param transfer a transfer + * \param packet the packet to return the address of + * \returns the base address of the packet buffer inside the transfer buffer, + * or NULL if the packet does not exist. + * \see libusb_get_iso_packet_buffer() + */ +static inline unsigned char *libusb_get_iso_packet_buffer_simple( + struct libusb_transfer *transfer, unsigned int packet) +{ + int _packet; + + /* oops..slight bug in the API. packet is an unsigned int, but we use + * signed integers almost everywhere else. range-check and convert to + * signed to avoid compiler warnings. FIXME for libusb-2. */ + if (packet > INT_MAX) + return NULL; + _packet = (int) packet; + + if (_packet >= transfer->num_iso_packets) + return NULL; + + return transfer->buffer + ((int) transfer->iso_packet_desc[0].length * _packet); +} + +/* sync I/O */ + +int LIBUSB_CALL 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); + +int LIBUSB_CALL libusb_bulk_transfer(libusb_device_handle *dev_handle, + unsigned char endpoint, unsigned char *data, int length, + int *actual_length, unsigned int timeout); + +int LIBUSB_CALL libusb_interrupt_transfer(libusb_device_handle *dev_handle, + unsigned char endpoint, unsigned char *data, int length, + int *actual_length, unsigned int timeout); + +/** \ingroup desc + * Retrieve a descriptor from the default control pipe. + * This is a convenience function which formulates the appropriate control + * message to retrieve the descriptor. + * + * \param dev a device handle + * \param desc_type the descriptor type, see \ref libusb_descriptor_type + * \param desc_index the index of the descriptor to retrieve + * \param data output buffer for descriptor + * \param length size of data buffer + * \returns number of bytes returned in data, or LIBUSB_ERROR code on failure + */ +static inline int libusb_get_descriptor(libusb_device_handle *dev, + uint8_t desc_type, uint8_t desc_index, unsigned char *data, int length) +{ + return libusb_control_transfer(dev, LIBUSB_ENDPOINT_IN, + LIBUSB_REQUEST_GET_DESCRIPTOR, (uint16_t) ((desc_type << 8) | desc_index), + 0, data, (uint16_t) length, 1000); +} + +/** \ingroup desc + * Retrieve a descriptor from a device. + * This is a convenience function which formulates the appropriate control + * message to retrieve the descriptor. The string returned is Unicode, as + * detailed in the USB specifications. + * + * \param dev a device handle + * \param desc_index the index of the descriptor to retrieve + * \param langid the language ID for the string descriptor + * \param data output buffer for descriptor + * \param length size of data buffer + * \returns number of bytes returned in data, or LIBUSB_ERROR code on failure + * \see libusb_get_string_descriptor_ascii() + */ +static inline int libusb_get_string_descriptor(libusb_device_handle *dev, + uint8_t desc_index, uint16_t langid, unsigned char *data, int length) +{ + return libusb_control_transfer(dev, LIBUSB_ENDPOINT_IN, + LIBUSB_REQUEST_GET_DESCRIPTOR, (uint16_t)((LIBUSB_DT_STRING << 8) | desc_index), + langid, data, (uint16_t) length, 1000); +} + +int LIBUSB_CALL libusb_get_string_descriptor_ascii(libusb_device_handle *dev, + uint8_t desc_index, unsigned char *data, int length); + +/* polling and timeouts */ + +int LIBUSB_CALL libusb_try_lock_events(libusb_context *ctx); +void LIBUSB_CALL libusb_lock_events(libusb_context *ctx); +void LIBUSB_CALL libusb_unlock_events(libusb_context *ctx); +int LIBUSB_CALL libusb_event_handling_ok(libusb_context *ctx); +int LIBUSB_CALL libusb_event_handler_active(libusb_context *ctx); +void LIBUSB_CALL libusb_lock_event_waiters(libusb_context *ctx); +void LIBUSB_CALL libusb_unlock_event_waiters(libusb_context *ctx); +int LIBUSB_CALL libusb_wait_for_event(libusb_context *ctx, struct timeval *tv); + +int LIBUSB_CALL libusb_handle_events_timeout(libusb_context *ctx, + struct timeval *tv); +int LIBUSB_CALL libusb_handle_events_timeout_completed(libusb_context *ctx, + struct timeval *tv, int *completed); +int LIBUSB_CALL libusb_handle_events(libusb_context *ctx); +int LIBUSB_CALL libusb_handle_events_completed(libusb_context *ctx, int *completed); +int LIBUSB_CALL libusb_handle_events_locked(libusb_context *ctx, + struct timeval *tv); +int LIBUSB_CALL libusb_pollfds_handle_timeouts(libusb_context *ctx); +int LIBUSB_CALL libusb_get_next_timeout(libusb_context *ctx, + struct timeval *tv); + +/** \ingroup poll + * File descriptor for polling + */ +struct libusb_pollfd { + /** Numeric file descriptor */ + int fd; + + /** Event flags to poll for from <poll.h>. POLLIN indicates that you + * should monitor this file descriptor for becoming ready to read from, + * and POLLOUT indicates that you should monitor this file descriptor for + * nonblocking write readiness. */ + short events; +}; + +/** \ingroup poll + * Callback function, invoked when a new file descriptor should be added + * to the set of file descriptors monitored for events. + * \param fd the new file descriptor + * \param events events to monitor for, see \ref libusb_pollfd for a + * description + * \param user_data User data pointer specified in + * libusb_set_pollfd_notifiers() call + * \see libusb_set_pollfd_notifiers() + */ +typedef void (LIBUSB_CALL *libusb_pollfd_added_cb)(int fd, short events, + void *user_data); + +/** \ingroup poll + * Callback function, invoked when a file descriptor should be removed from + * the set of file descriptors being monitored for events. After returning + * from this callback, do not use that file descriptor again. + * \param fd the file descriptor to stop monitoring + * \param user_data User data pointer specified in + * libusb_set_pollfd_notifiers() call + * \see libusb_set_pollfd_notifiers() + */ +typedef void (LIBUSB_CALL *libusb_pollfd_removed_cb)(int fd, void *user_data); + +const struct libusb_pollfd ** LIBUSB_CALL libusb_get_pollfds( + libusb_context *ctx); +void LIBUSB_CALL libusb_set_pollfd_notifiers(libusb_context *ctx, + libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb, + void *user_data); + +/** \ingroup hotplug + * Callback handle. + * + * Callbacks handles are generated by libusb_hotplug_register_callback() + * and can be used to deregister callbacks. Callback handles are unique + * per libusb_context and it is safe to call libusb_hotplug_deregister_callback() + * on an already deregisted callback. + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * For more information, see \ref hotplug. + */ +typedef int libusb_hotplug_callback_handle; + +/** \ingroup hotplug + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * Flags for hotplug events */ +typedef enum { + /** Arm the callback and fire it for all matching currently attached devices. */ + LIBUSB_HOTPLUG_ENUMERATE = 1, +} libusb_hotplug_flag; + +/** \ingroup hotplug + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * Hotplug events */ +typedef enum { + /** A device has been plugged in and is ready to use */ + LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED = 0x01, + + /** A device has left and is no longer available. + * It is the user's responsibility to call libusb_close on any handle associated with a disconnected device. + * It is safe to call libusb_get_device_descriptor on a device that has left */ + LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT = 0x02, +} libusb_hotplug_event; + +/** \ingroup hotplug + * Wildcard matching for hotplug events */ +#define LIBUSB_HOTPLUG_MATCH_ANY -1 + +/** \ingroup hotplug + * Hotplug callback function type. When requesting hotplug event notifications, + * you pass a pointer to a callback function of this type. + * + * This callback may be called by an internal event thread and as such it is + * recommended the callback do minimal processing before returning. + * + * libusb will call this function later, when a matching event had happened on + * a matching device. See \ref hotplug for more information. + * + * It is safe to call either libusb_hotplug_register_callback() or + * libusb_hotplug_deregister_callback() from within a callback function. + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * \param ctx context of this notification + * \param device libusb_device this event occurred on + * \param event event that occurred + * \param user_data user data provided when this callback was registered + * \returns bool whether this callback is finished processing events. + * returning 1 will cause this callback to be deregistered + */ +typedef int (LIBUSB_CALL *libusb_hotplug_callback_fn)(libusb_context *ctx, + libusb_device *device, + libusb_hotplug_event event, + void *user_data); + +/** \ingroup hotplug + * Register a hotplug callback function + * + * Register a callback with the libusb_context. The callback will fire + * when a matching event occurs on a matching device. The callback is + * armed until either it is deregistered with libusb_hotplug_deregister_callback() + * or the supplied callback returns 1 to indicate it is finished processing events. + * + * If the \ref LIBUSB_HOTPLUG_ENUMERATE is passed the callback will be + * called with a \ref LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED for all devices + * already plugged into the machine. Note that libusb modifies its internal + * device list from a separate thread, while calling hotplug callbacks from + * libusb_handle_events(), so it is possible for a device to already be present + * on, or removed from, its internal device list, while the hotplug callbacks + * still need to be dispatched. This means that when using \ref + * LIBUSB_HOTPLUG_ENUMERATE, your callback may be called twice for the arrival + * of the same device, once from libusb_hotplug_register_callback() and once + * from libusb_handle_events(); and/or your callback may be called for the + * removal of a device for which an arrived call was never made. + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * \param[in] ctx context to register this callback with + * \param[in] events bitwise or of events that will trigger this callback. See \ref + * libusb_hotplug_event + * \param[in] flags hotplug callback flags. See \ref libusb_hotplug_flag + * \param[in] vendor_id the vendor id to match or \ref LIBUSB_HOTPLUG_MATCH_ANY + * \param[in] product_id the product id to match or \ref LIBUSB_HOTPLUG_MATCH_ANY + * \param[in] dev_class the device class to match or \ref LIBUSB_HOTPLUG_MATCH_ANY + * \param[in] cb_fn the function to be invoked on a matching event/device + * \param[in] user_data user data to pass to the callback function + * \param[out] handle pointer to store the handle of the allocated callback (can be NULL) + * \returns LIBUSB_SUCCESS on success LIBUSB_ERROR code on failure + */ +int LIBUSB_CALL libusb_hotplug_register_callback(libusb_context *ctx, + libusb_hotplug_event events, + libusb_hotplug_flag flags, + int vendor_id, int product_id, + int dev_class, + libusb_hotplug_callback_fn cb_fn, + void *user_data, + libusb_hotplug_callback_handle *handle); + +/** \ingroup hotplug + * Deregisters a hotplug callback. + * + * Deregister a callback from a libusb_context. This function is safe to call from within + * a hotplug callback. + * + * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 + * + * \param[in] ctx context this callback is registered with + * \param[in] handle the handle of the callback to deregister + */ +void LIBUSB_CALL libusb_hotplug_deregister_callback(libusb_context *ctx, + libusb_hotplug_callback_handle handle); + +#ifdef __cplusplus +} +#endif + +#endif |