1 /* -*- Mode: C; indent-tabs-mode:nil -*- */
3 * darwin backend for libusb 1.0
4 * Copyright © 2008-2020 Nathan Hjelm <hjelmn@cs.unm.edu>
5 * Copyright © 2019-2020 Google LLC. All rights reserved.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 #include <sys/types.h>
33 #include <sys/sysctl.h>
35 #include <mach/clock.h>
36 #include <mach/clock_types.h>
37 #include <mach/mach_host.h>
38 #include <mach/mach_port.h>
40 /* Suppress warnings about the use of the deprecated objc_registerThreadWithCollector
41 * function. Its use is also conditionalized to only older deployment targets. */
42 #define OBJC_SILENCE_GC_DEPRECATIONS 1
44 /* Default timeout to 10s for reenumerate. This is needed because USBDeviceReEnumerate
45 * does not return error status on macOS. */
46 #define DARWIN_REENUMERATE_TIMEOUT_US 10000000
48 #include <AvailabilityMacros.h>
49 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 && MAC_OS_X_VERSION_MIN_REQUIRED < 101200
50 #include <objc/objc-auto.h>
53 #include "darwin_usb.h"
55 static int init_count = 0;
57 /* async event thread */
58 static pthread_mutex_t libusb_darwin_at_mutex = PTHREAD_MUTEX_INITIALIZER;
59 static pthread_cond_t libusb_darwin_at_cond = PTHREAD_COND_INITIALIZER;
61 #if !defined(HAVE_CLOCK_GETTIME)
62 static clock_serv_t clock_realtime;
63 static clock_serv_t clock_monotonic;
66 #define LIBUSB_DARWIN_STARTUP_FAILURE ((CFRunLoopRef) -1)
68 static CFRunLoopRef libusb_darwin_acfl = NULL; /* event cf loop */
69 static CFRunLoopSourceRef libusb_darwin_acfls = NULL; /* shutdown signal for event cf loop */
71 static usbi_mutex_t darwin_cached_devices_lock = PTHREAD_MUTEX_INITIALIZER;
72 static struct list_head darwin_cached_devices;
73 static const char *darwin_device_class = "IOUSBDevice";
75 #define DARWIN_CACHED_DEVICE(a) (((struct darwin_device_priv *)usbi_get_device_priv((a)))->dev)
77 /* async event thread */
78 static pthread_t libusb_darwin_at;
80 static int darwin_get_config_descriptor(struct libusb_device *dev, uint8_t config_index, void *buffer, size_t len);
81 static int darwin_claim_interface(struct libusb_device_handle *dev_handle, uint8_t iface);
82 static int darwin_release_interface(struct libusb_device_handle *dev_handle, uint8_t iface);
83 static int darwin_reenumerate_device(struct libusb_device_handle *dev_handle, bool capture);
84 static int darwin_reset_device(struct libusb_device_handle *dev_handle);
85 static void darwin_async_io_callback (void *refcon, IOReturn result, void *arg0);
87 static enum libusb_error darwin_scan_devices(struct libusb_context *ctx);
88 static enum libusb_error process_new_device (struct libusb_context *ctx, struct darwin_cached_device *cached_device,
89 UInt64 old_session_id);
91 static enum libusb_error darwin_get_cached_device(io_service_t service, struct darwin_cached_device **cached_out,
92 UInt64 *old_session_id);
94 #if defined(ENABLE_LOGGING)
95 static const char *darwin_error_str (IOReturn result) {
96 static char string_buffer[50];
98 case kIOReturnSuccess:
100 case kIOReturnNotOpen:
101 return "device not opened for exclusive access";
102 case kIOReturnNoDevice:
103 return "no connection to an IOService";
104 case kIOUSBNoAsyncPortErr:
105 return "no async port has been opened for interface";
106 case kIOReturnExclusiveAccess:
107 return "another process has device opened for exclusive access";
108 case kIOUSBPipeStalled:
109 return "pipe is stalled";
111 return "could not establish a connection to the Darwin kernel";
112 case kIOUSBTransactionTimeout:
113 return "transaction timed out";
114 case kIOReturnBadArgument:
115 return "invalid argument";
116 case kIOReturnAborted:
117 return "transaction aborted";
118 case kIOReturnNotResponding:
119 return "device not responding";
120 case kIOReturnOverrun:
121 return "data overrun";
122 case kIOReturnCannotWire:
123 return "physical memory can not be wired down";
124 case kIOReturnNoResources:
125 return "out of resources";
126 case kIOUSBHighSpeedSplitError:
127 return "high speed split error";
128 case kIOUSBUnknownPipeErr:
129 return "pipe ref not recognized";
131 snprintf(string_buffer, sizeof(string_buffer), "unknown error (0x%x)", result);
132 return string_buffer;
137 static enum libusb_error darwin_to_libusb (IOReturn result) {
139 case kIOReturnUnderrun:
140 case kIOReturnSuccess:
141 return LIBUSB_SUCCESS;
142 case kIOReturnNotOpen:
143 case kIOReturnNoDevice:
144 return LIBUSB_ERROR_NO_DEVICE;
145 case kIOReturnExclusiveAccess:
146 return LIBUSB_ERROR_ACCESS;
147 case kIOUSBPipeStalled:
148 return LIBUSB_ERROR_PIPE;
149 case kIOReturnBadArgument:
150 return LIBUSB_ERROR_INVALID_PARAM;
151 case kIOUSBTransactionTimeout:
152 return LIBUSB_ERROR_TIMEOUT;
153 case kIOReturnNotResponding:
154 case kIOReturnAborted:
156 case kIOUSBNoAsyncPortErr:
157 case kIOUSBUnknownPipeErr:
159 return LIBUSB_ERROR_OTHER;
163 /* this function must be called with the darwin_cached_devices_lock held */
164 static void darwin_deref_cached_device(struct darwin_cached_device *cached_dev) {
165 cached_dev->refcount--;
166 /* free the device and remove it from the cache */
167 if (0 == cached_dev->refcount) {
168 list_del(&cached_dev->list);
170 if (cached_dev->device) {
171 (*(cached_dev->device))->Release(cached_dev->device);
172 cached_dev->device = NULL;
174 IOObjectRelease (cached_dev->service);
179 static void darwin_ref_cached_device(struct darwin_cached_device *cached_dev) {
180 cached_dev->refcount++;
183 static int ep_to_pipeRef(struct libusb_device_handle *dev_handle, uint8_t ep, uint8_t *pipep, uint8_t *ifcp, struct darwin_interface **interface_out) {
184 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
186 /* current interface */
187 struct darwin_interface *cInterface;
191 usbi_dbg ("converting ep address 0x%02x to pipeRef and interface", ep);
193 for (iface = 0 ; iface < USB_MAXINTERFACES ; iface++) {
194 cInterface = &priv->interfaces[iface];
196 if (dev_handle->claimed_interfaces & (1U << iface)) {
197 for (i = 0 ; i < cInterface->num_endpoints ; i++) {
198 if (cInterface->endpoint_addrs[i] == ep) {
205 *interface_out = cInterface;
207 usbi_dbg ("pipe %d on interface %d matches", *pipep, iface);
208 return LIBUSB_SUCCESS;
214 /* No pipe found with the correct endpoint address */
215 usbi_warn (HANDLE_CTX(dev_handle), "no pipeRef found with endpoint address 0x%02x.", ep);
217 return LIBUSB_ERROR_NOT_FOUND;
220 static IOReturn usb_setup_device_iterator (io_iterator_t *deviceIterator, UInt32 location) {
221 CFMutableDictionaryRef matchingDict = IOServiceMatching(darwin_device_class);
224 return kIOReturnError;
227 CFMutableDictionaryRef propertyMatchDict = CFDictionaryCreateMutable(kCFAllocatorDefault, 0,
228 &kCFTypeDictionaryKeyCallBacks,
229 &kCFTypeDictionaryValueCallBacks);
231 /* there are no unsigned CFNumber types so treat the value as signed. the OS seems to do this
232 internally (CFNumberType of locationID is kCFNumberSInt32Type) */
233 CFTypeRef locationCF = CFNumberCreate (NULL, kCFNumberSInt32Type, &location);
235 if (propertyMatchDict && locationCF) {
236 CFDictionarySetValue (propertyMatchDict, CFSTR(kUSBDevicePropertyLocationID), locationCF);
237 CFDictionarySetValue (matchingDict, CFSTR(kIOPropertyMatchKey), propertyMatchDict);
239 /* else we can still proceed as long as the caller accounts for the possibility of other devices in the iterator */
241 /* release our references as per the Create Rule */
242 if (propertyMatchDict)
243 CFRelease (propertyMatchDict);
245 CFRelease (locationCF);
248 return IOServiceGetMatchingServices(kIOMasterPortDefault, matchingDict, deviceIterator);
251 /* Returns 1 on success, 0 on failure. */
252 static bool get_ioregistry_value_number (io_service_t service, CFStringRef property, CFNumberType type, void *p) {
253 CFTypeRef cfNumber = IORegistryEntryCreateCFProperty (service, property, kCFAllocatorDefault, 0);
257 if (CFGetTypeID(cfNumber) == CFNumberGetTypeID()) {
258 success = CFNumberGetValue(cfNumber, type, p);
261 CFRelease (cfNumber);
264 return (success != 0);
267 /* Returns 1 on success, 0 on failure. */
268 static bool get_ioregistry_value_data (io_service_t service, CFStringRef property, ssize_t size, void *p) {
269 CFTypeRef cfData = IORegistryEntryCreateCFProperty (service, property, kCFAllocatorDefault, 0);
270 bool success = false;
273 if (CFGetTypeID (cfData) == CFDataGetTypeID ()) {
274 CFIndex length = CFDataGetLength (cfData);
279 CFDataGetBytes (cfData, CFRangeMake(0, size), p);
289 static usb_device_t **darwin_device_from_service (io_service_t service)
291 io_cf_plugin_ref_t *plugInInterface = NULL;
292 usb_device_t **device;
295 const int max_retries = 5;
297 /* The IOCreatePlugInInterfaceForService function might consistently return
298 an "out of resources" error with certain USB devices the first time we run
299 it. The reason is still unclear, but retrying fixes the problem */
300 for (int count = 0; count < max_retries; count++) {
301 kresult = IOCreatePlugInInterfaceForService(service, kIOUSBDeviceUserClientTypeID,
302 kIOCFPlugInInterfaceID, &plugInInterface,
304 if (kIOReturnSuccess == kresult && plugInInterface) {
308 usbi_dbg ("set up plugin for service retry: %s", darwin_error_str (kresult));
310 /* sleep for a little while before trying again */
311 nanosleep(&(struct timespec){.tv_sec = 0, .tv_nsec = 1000}, NULL);
314 if (kIOReturnSuccess != kresult || !plugInInterface) {
315 usbi_dbg ("could not set up plugin for service: %s", darwin_error_str (kresult));
319 (void)(*plugInInterface)->QueryInterface(plugInInterface, CFUUIDGetUUIDBytes(DeviceInterfaceID),
321 /* Use release instead of IODestroyPlugInInterface to avoid stopping IOServices associated with this device */
322 (*plugInInterface)->Release (plugInInterface);
327 static void darwin_devices_attached (void *ptr, io_iterator_t add_devices) {
329 struct darwin_cached_device *cached_device;
330 UInt64 old_session_id;
331 struct libusb_context *ctx;
332 io_service_t service;
335 usbi_mutex_lock(&active_contexts_lock);
337 while ((service = IOIteratorNext(add_devices))) {
338 ret = darwin_get_cached_device (service, &cached_device, &old_session_id);
339 if (ret < 0 || !cached_device->can_enumerate) {
343 /* add this device to each active context's device list */
344 for_each_context(ctx) {
345 process_new_device (ctx, cached_device, old_session_id);
348 if (cached_device->in_reenumerate) {
349 usbi_dbg ("cached device in reset state. reset complete...");
350 cached_device->in_reenumerate = false;
353 IOObjectRelease(service);
356 usbi_mutex_unlock(&active_contexts_lock);
359 static void darwin_devices_detached (void *ptr, io_iterator_t rem_devices) {
361 struct libusb_device *dev = NULL;
362 struct libusb_context *ctx;
363 struct darwin_cached_device *old_device;
369 usbi_mutex_lock(&active_contexts_lock);
371 while ((device = IOIteratorNext (rem_devices)) != 0) {
372 bool is_reenumerating = false;
374 /* get the location from the i/o registry */
375 ret = get_ioregistry_value_number (device, CFSTR("sessionID"), kCFNumberSInt64Type, &session);
376 IOObjectRelease (device);
380 /* we need to match darwin_ref_cached_device call made in darwin_get_cached_device function
381 otherwise no cached device will ever get freed */
382 usbi_mutex_lock(&darwin_cached_devices_lock);
383 list_for_each_entry(old_device, &darwin_cached_devices, list, struct darwin_cached_device) {
384 if (old_device->session == session) {
385 if (old_device->in_reenumerate) {
386 /* device is re-enumerating. do not dereference the device at this time. libusb_reset_device()
387 * will deref if needed. */
388 usbi_dbg ("detected device detached due to re-enumeration");
390 /* the device object is no longer usable so go ahead and release it */
391 if (old_device->device) {
392 (*(old_device->device))->Release(old_device->device);
393 old_device->device = NULL;
396 is_reenumerating = true;
398 darwin_deref_cached_device (old_device);
405 usbi_mutex_unlock(&darwin_cached_devices_lock);
406 if (is_reenumerating) {
410 for_each_context(ctx) {
411 usbi_dbg ("notifying context %p of device disconnect", ctx);
413 dev = usbi_get_device_by_session_id(ctx, (unsigned long) session);
415 /* signal the core that this device has been disconnected. the core will tear down this device
416 when the reference count reaches 0 */
417 usbi_disconnect_device(dev);
418 libusb_unref_device(dev);
423 usbi_mutex_unlock(&active_contexts_lock);
426 static void darwin_hotplug_poll (void)
428 /* not sure if 1 ms will be too long/short but it should work ok */
429 mach_timespec_t timeout = {.tv_sec = 0, .tv_nsec = 1000000ul};
431 /* since a kernel thread may notify the IOIterators used for
432 * hotplug notification we can't just clear the iterators.
433 * instead just wait until all IOService providers are quiet */
434 (void) IOKitWaitQuiet (kIOMasterPortDefault, &timeout);
437 static void darwin_clear_iterator (io_iterator_t iter) {
440 while ((device = IOIteratorNext (iter)) != 0)
441 IOObjectRelease (device);
444 static void darwin_fail_startup(void) {
445 pthread_mutex_lock (&libusb_darwin_at_mutex);
446 libusb_darwin_acfl = LIBUSB_DARWIN_STARTUP_FAILURE;
447 pthread_cond_signal (&libusb_darwin_at_cond);
448 pthread_mutex_unlock (&libusb_darwin_at_mutex);
452 static void *darwin_event_thread_main (void *arg0) {
454 struct libusb_context *ctx = (struct libusb_context *)arg0;
455 CFRunLoopRef runloop;
456 CFRunLoopSourceRef libusb_shutdown_cfsource;
457 CFRunLoopSourceContext libusb_shutdown_cfsourcectx;
459 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
460 /* Set this thread's name, so it can be seen in the debugger
461 and crash reports. */
462 pthread_setname_np ("org.libusb.device-hotplug");
465 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 && MAC_OS_X_VERSION_MIN_REQUIRED < 101200
466 /* Tell the Objective-C garbage collector about this thread.
467 This is required because, unlike NSThreads, pthreads are
468 not automatically registered. Although we don't use
469 Objective-C, we use CoreFoundation, which does.
470 Garbage collection support was entirely removed in 10.12,
471 so don't bother there. */
472 objc_registerThreadWithCollector();
475 /* hotplug (device arrival/removal) sources */
476 CFRunLoopSourceRef libusb_notification_cfsource;
477 io_notification_port_t libusb_notification_port;
478 io_iterator_t libusb_rem_device_iterator;
479 io_iterator_t libusb_add_device_iterator;
481 usbi_dbg ("creating hotplug event source");
483 runloop = CFRunLoopGetCurrent ();
486 /* add the shutdown cfsource to the run loop */
487 memset(&libusb_shutdown_cfsourcectx, 0, sizeof(libusb_shutdown_cfsourcectx));
488 libusb_shutdown_cfsourcectx.info = runloop;
489 libusb_shutdown_cfsourcectx.perform = (void (*)(void *))CFRunLoopStop;
490 libusb_shutdown_cfsource = CFRunLoopSourceCreate(NULL, 0, &libusb_shutdown_cfsourcectx);
491 CFRunLoopAddSource(runloop, libusb_shutdown_cfsource, kCFRunLoopDefaultMode);
493 /* add the notification port to the run loop */
494 libusb_notification_port = IONotificationPortCreate (kIOMasterPortDefault);
495 libusb_notification_cfsource = IONotificationPortGetRunLoopSource (libusb_notification_port);
496 CFRunLoopAddSource(runloop, libusb_notification_cfsource, kCFRunLoopDefaultMode);
498 /* create notifications for removed devices */
499 kresult = IOServiceAddMatchingNotification (libusb_notification_port, kIOTerminatedNotification,
500 IOServiceMatching(darwin_device_class),
501 darwin_devices_detached,
502 ctx, &libusb_rem_device_iterator);
504 if (kresult != kIOReturnSuccess) {
505 usbi_err (ctx, "could not add hotplug event source: %s", darwin_error_str (kresult));
506 CFRelease (libusb_shutdown_cfsource);
508 darwin_fail_startup ();
511 /* create notifications for attached devices */
512 kresult = IOServiceAddMatchingNotification(libusb_notification_port, kIOFirstMatchNotification,
513 IOServiceMatching(darwin_device_class),
514 darwin_devices_attached,
515 ctx, &libusb_add_device_iterator);
517 if (kresult != kIOReturnSuccess) {
518 usbi_err (ctx, "could not add hotplug event source: %s", darwin_error_str (kresult));
519 CFRelease (libusb_shutdown_cfsource);
521 darwin_fail_startup ();
525 darwin_clear_iterator (libusb_rem_device_iterator);
526 darwin_clear_iterator (libusb_add_device_iterator);
528 usbi_dbg ("darwin event thread ready to receive events");
530 /* signal the main thread that the hotplug runloop has been created. */
531 pthread_mutex_lock (&libusb_darwin_at_mutex);
532 libusb_darwin_acfl = runloop;
533 libusb_darwin_acfls = libusb_shutdown_cfsource;
534 pthread_cond_signal (&libusb_darwin_at_cond);
535 pthread_mutex_unlock (&libusb_darwin_at_mutex);
537 /* run the runloop */
540 usbi_dbg ("darwin event thread exiting");
542 /* signal the main thread that the hotplug runloop has finished. */
543 pthread_mutex_lock (&libusb_darwin_at_mutex);
544 libusb_darwin_acfls = NULL;
545 libusb_darwin_acfl = NULL;
546 pthread_cond_signal (&libusb_darwin_at_cond);
547 pthread_mutex_unlock (&libusb_darwin_at_mutex);
549 /* remove the notification cfsource */
550 CFRunLoopRemoveSource(runloop, libusb_notification_cfsource, kCFRunLoopDefaultMode);
552 /* remove the shutdown cfsource */
553 CFRunLoopRemoveSource(runloop, libusb_shutdown_cfsource, kCFRunLoopDefaultMode);
555 /* delete notification port */
556 IONotificationPortDestroy (libusb_notification_port);
558 /* delete iterators */
559 IOObjectRelease (libusb_rem_device_iterator);
560 IOObjectRelease (libusb_add_device_iterator);
562 CFRelease (libusb_shutdown_cfsource);
568 /* cleanup function to destroy cached devices */
569 static void darwin_cleanup_devices(void) {
570 struct darwin_cached_device *dev, *next;
572 list_for_each_entry_safe(dev, next, &darwin_cached_devices, list, struct darwin_cached_device) {
573 darwin_deref_cached_device(dev);
576 darwin_cached_devices.prev = darwin_cached_devices.next = NULL;
579 static int darwin_init(struct libusb_context *ctx) {
583 first_init = (1 == ++init_count);
587 assert (NULL == darwin_cached_devices.next);
588 list_init (&darwin_cached_devices);
590 #if !defined(HAVE_CLOCK_GETTIME)
591 /* create the clocks that will be used if clock_gettime() is not available */
592 host_name_port_t host_self;
594 host_self = mach_host_self();
595 host_get_clock_service(host_self, CALENDAR_CLOCK, &clock_realtime);
596 host_get_clock_service(host_self, SYSTEM_CLOCK, &clock_monotonic);
597 mach_port_deallocate(mach_task_self(), host_self);
601 rc = darwin_scan_devices (ctx);
602 if (LIBUSB_SUCCESS != rc)
606 rc = pthread_create (&libusb_darwin_at, NULL, darwin_event_thread_main, ctx);
608 usbi_err (ctx, "could not create event thread, error %d", rc);
609 rc = LIBUSB_ERROR_OTHER;
613 pthread_mutex_lock (&libusb_darwin_at_mutex);
614 while (!libusb_darwin_acfl)
615 pthread_cond_wait (&libusb_darwin_at_cond, &libusb_darwin_at_mutex);
616 if (libusb_darwin_acfl == LIBUSB_DARWIN_STARTUP_FAILURE) {
617 libusb_darwin_acfl = NULL;
618 rc = LIBUSB_ERROR_OTHER;
620 pthread_mutex_unlock (&libusb_darwin_at_mutex);
623 pthread_join (libusb_darwin_at, NULL);
627 if (LIBUSB_SUCCESS != rc) {
629 darwin_cleanup_devices ();
630 #if !defined(HAVE_CLOCK_GETTIME)
631 mach_port_deallocate(mach_task_self(), clock_realtime);
632 mach_port_deallocate(mach_task_self(), clock_monotonic);
641 static void darwin_exit (struct libusb_context *ctx) {
644 if (0 == --init_count) {
645 /* stop the event runloop and wait for the thread to terminate. */
646 pthread_mutex_lock (&libusb_darwin_at_mutex);
647 CFRunLoopSourceSignal (libusb_darwin_acfls);
648 CFRunLoopWakeUp (libusb_darwin_acfl);
649 while (libusb_darwin_acfl)
650 pthread_cond_wait (&libusb_darwin_at_cond, &libusb_darwin_at_mutex);
651 pthread_mutex_unlock (&libusb_darwin_at_mutex);
652 pthread_join (libusb_darwin_at, NULL);
654 darwin_cleanup_devices ();
656 #if !defined(HAVE_CLOCK_GETTIME)
657 mach_port_deallocate(mach_task_self(), clock_realtime);
658 mach_port_deallocate(mach_task_self(), clock_monotonic);
663 static int get_configuration_index (struct libusb_device *dev, UInt8 config_value) {
664 struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev);
666 IOUSBConfigurationDescriptorPtr desc;
669 /* is there a simpler way to determine the index? */
670 kresult = (*(priv->device))->GetNumberOfConfigurations (priv->device, &numConfig);
671 if (kresult != kIOReturnSuccess)
672 return darwin_to_libusb (kresult);
674 for (i = 0 ; i < numConfig ; i++) {
675 (*(priv->device))->GetConfigurationDescriptorPtr (priv->device, i, &desc);
677 if (desc->bConfigurationValue == config_value)
681 /* configuration not found */
682 return LIBUSB_ERROR_NOT_FOUND;
685 static int darwin_get_active_config_descriptor(struct libusb_device *dev, void *buffer, size_t len) {
686 struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev);
689 if (0 == priv->active_config)
690 return LIBUSB_ERROR_NOT_FOUND;
692 config_index = get_configuration_index (dev, priv->active_config);
693 if (config_index < 0)
696 assert(config_index >= 0 && config_index <= UINT8_MAX);
697 return darwin_get_config_descriptor (dev, (UInt8)config_index, buffer, len);
700 static int darwin_get_config_descriptor(struct libusb_device *dev, uint8_t config_index, void *buffer, size_t len) {
701 struct darwin_cached_device *priv = DARWIN_CACHED_DEVICE(dev);
702 IOUSBConfigurationDescriptorPtr desc;
706 if (!priv || !priv->device)
707 return LIBUSB_ERROR_OTHER;
709 kresult = (*priv->device)->GetConfigurationDescriptorPtr (priv->device, config_index, &desc);
710 if (kresult == kIOReturnSuccess) {
711 /* copy descriptor */
712 if (libusb_le16_to_cpu(desc->wTotalLength) < len)
713 len = libusb_le16_to_cpu(desc->wTotalLength);
715 memmove (buffer, desc, len);
718 ret = darwin_to_libusb (kresult);
719 if (ret != LIBUSB_SUCCESS)
725 /* check whether the os has configured the device */
726 static enum libusb_error darwin_check_configuration (struct libusb_context *ctx, struct darwin_cached_device *dev) {
727 usb_device_t **darwin_device = dev->device;
729 IOUSBConfigurationDescriptorPtr configDesc;
730 IOUSBFindInterfaceRequest request;
732 io_iterator_t interface_iterator;
733 io_service_t firstInterface;
735 if (dev->dev_descriptor.bNumConfigurations < 1) {
736 usbi_err (ctx, "device has no configurations");
737 return LIBUSB_ERROR_OTHER; /* no configurations at this speed so we can't use it */
740 /* checking the configuration of a root hub simulation takes ~1 s in 10.11. the device is
742 if (0x05ac == libusb_le16_to_cpu (dev->dev_descriptor.idVendor) &&
743 0x8005 == libusb_le16_to_cpu (dev->dev_descriptor.idProduct)) {
744 usbi_dbg ("ignoring configuration on root hub simulation");
745 dev->active_config = 0;
746 return LIBUSB_SUCCESS;
749 /* find the first configuration */
750 kresult = (*darwin_device)->GetConfigurationDescriptorPtr (darwin_device, 0, &configDesc);
751 dev->first_config = (kIOReturnSuccess == kresult) ? configDesc->bConfigurationValue : 1;
753 /* check if the device is already configured. there is probably a better way than iterating over the
754 to accomplish this (the trick is we need to avoid a call to GetConfigurations since buggy devices
755 might lock up on the device request) */
757 /* Setup the Interface Request */
758 request.bInterfaceClass = kIOUSBFindInterfaceDontCare;
759 request.bInterfaceSubClass = kIOUSBFindInterfaceDontCare;
760 request.bInterfaceProtocol = kIOUSBFindInterfaceDontCare;
761 request.bAlternateSetting = kIOUSBFindInterfaceDontCare;
763 kresult = (*(darwin_device))->CreateInterfaceIterator(darwin_device, &request, &interface_iterator);
764 if (kresult != kIOReturnSuccess)
765 return darwin_to_libusb (kresult);
768 firstInterface = IOIteratorNext(interface_iterator);
770 /* done with the interface iterator */
771 IOObjectRelease(interface_iterator);
773 if (firstInterface) {
774 IOObjectRelease (firstInterface);
776 /* device is configured */
777 if (dev->dev_descriptor.bNumConfigurations == 1)
778 /* to avoid problems with some devices get the configurations value from the configuration descriptor */
779 dev->active_config = dev->first_config;
781 /* devices with more than one configuration should work with GetConfiguration */
782 (*darwin_device)->GetConfiguration (darwin_device, &dev->active_config);
785 dev->active_config = 0;
787 usbi_dbg ("active config: %u, first config: %u", dev->active_config, dev->first_config);
789 return LIBUSB_SUCCESS;
792 static IOReturn darwin_request_descriptor (usb_device_t **device, UInt8 desc, UInt8 desc_index, void *buffer, size_t buffer_size) {
793 IOUSBDevRequestTO req;
795 assert(buffer_size <= UINT16_MAX);
797 memset (buffer, 0, buffer_size);
799 /* Set up request for descriptor/ */
800 req.bmRequestType = USBmakebmRequestType(kUSBIn, kUSBStandard, kUSBDevice);
801 req.bRequest = kUSBRqGetDescriptor;
802 req.wValue = (UInt16)(desc << 8);
803 req.wIndex = desc_index;
804 req.wLength = (UInt16)buffer_size;
806 req.noDataTimeout = 20;
807 req.completionTimeout = 100;
809 return (*device)->DeviceRequestTO (device, &req);
812 static enum libusb_error darwin_cache_device_descriptor (struct darwin_cached_device *dev) {
813 usb_device_t **device = dev->device;
815 long delay = 30000; // microseconds
816 int unsuspended = 0, try_unsuspend = 1, try_reconfigure = 1;
818 IOReturn ret = 0, ret2;
820 UInt16 idProduct, idVendor;
822 dev->can_enumerate = 0;
824 (*device)->GetDeviceClass (device, &bDeviceClass);
825 (*device)->GetDeviceProduct (device, &idProduct);
826 (*device)->GetDeviceVendor (device, &idVendor);
828 /* According to Apple's documentation the device must be open for DeviceRequest but we may not be able to open some
829 * devices and Apple's USB Prober doesn't bother to open the device before issuing a descriptor request. Still,
830 * to follow the spec as closely as possible, try opening the device */
831 is_open = ((*device)->USBDeviceOpenSeize(device) == kIOReturnSuccess);
834 /**** retrieve device descriptor ****/
835 ret = darwin_request_descriptor (device, kUSBDeviceDesc, 0, &dev->dev_descriptor, sizeof(dev->dev_descriptor));
837 if (kIOReturnOverrun == ret && kUSBDeviceDesc == dev->dev_descriptor.bDescriptorType)
838 /* received an overrun error but we still received a device descriptor */
839 ret = kIOReturnSuccess;
841 if (kIOUSBVendorIDAppleComputer == idVendor) {
842 /* NTH: don't bother retrying or unsuspending Apple devices */
846 if (kIOReturnSuccess == ret && (0 == dev->dev_descriptor.bNumConfigurations ||
847 0 == dev->dev_descriptor.bcdUSB)) {
848 /* work around for incorrectly configured devices */
849 if (try_reconfigure && is_open) {
850 usbi_dbg("descriptor appears to be invalid. resetting configuration before trying again...");
852 /* set the first configuration */
853 (*device)->SetConfiguration(device, 1);
855 /* don't try to reconfigure again */
859 ret = kIOUSBPipeStalled;
862 if (kIOReturnSuccess != ret && is_open && try_unsuspend) {
863 /* device may be suspended. unsuspend it and try again */
864 #if DeviceVersion >= 320
867 /* IOUSBFamily 320+ provides a way to detect device suspension but earlier versions do not */
868 (void)(*device)->GetUSBDeviceInformation (device, &info);
870 /* note that the device was suspended */
871 if (info & (1U << kUSBInformationDeviceIsSuspendedBit) || 0 == info)
876 /* try to unsuspend the device */
877 ret2 = (*device)->USBDeviceSuspend (device, 0);
878 if (kIOReturnSuccess != ret2) {
879 /* prevent log spew from poorly behaving devices. this indicates the
880 os actually had trouble communicating with the device */
881 usbi_dbg("could not retrieve device descriptor. failed to unsuspend: %s",darwin_error_str(ret2));
889 if (kIOReturnSuccess != ret) {
890 usbi_dbg("kernel responded with code: 0x%08x. sleeping for %ld ms before trying again", ret, delay/1000);
891 /* sleep for a little while before trying again */
892 nanosleep(&(struct timespec){delay / 1000000, (delay * 1000) % 1000000000}, NULL);
894 } while (kIOReturnSuccess != ret && retries--);
897 /* resuspend the device */
898 (void)(*device)->USBDeviceSuspend (device, 1);
901 (void) (*device)->USBDeviceClose (device);
903 if (ret != kIOReturnSuccess) {
904 /* a debug message was already printed out for this error */
905 if (LIBUSB_CLASS_HUB == bDeviceClass)
906 usbi_dbg ("could not retrieve device descriptor %.4x:%.4x: %s (%x). skipping device",
907 idVendor, idProduct, darwin_error_str (ret), ret);
909 usbi_warn (NULL, "could not retrieve device descriptor %.4x:%.4x: %s (%x). skipping device",
910 idVendor, idProduct, darwin_error_str (ret), ret);
911 return darwin_to_libusb (ret);
914 /* catch buggy hubs (which appear to be virtual). Apple's own USB prober has problems with these devices. */
915 if (libusb_le16_to_cpu (dev->dev_descriptor.idProduct) != idProduct) {
916 /* not a valid device */
917 usbi_warn (NULL, "idProduct from iokit (%04x) does not match idProduct in descriptor (%04x). skipping device",
918 idProduct, libusb_le16_to_cpu (dev->dev_descriptor.idProduct));
919 return LIBUSB_ERROR_NO_DEVICE;
922 usbi_dbg ("cached device descriptor:");
923 usbi_dbg (" bDescriptorType: 0x%02x", dev->dev_descriptor.bDescriptorType);
924 usbi_dbg (" bcdUSB: 0x%04x", libusb_le16_to_cpu (dev->dev_descriptor.bcdUSB));
925 usbi_dbg (" bDeviceClass: 0x%02x", dev->dev_descriptor.bDeviceClass);
926 usbi_dbg (" bDeviceSubClass: 0x%02x", dev->dev_descriptor.bDeviceSubClass);
927 usbi_dbg (" bDeviceProtocol: 0x%02x", dev->dev_descriptor.bDeviceProtocol);
928 usbi_dbg (" bMaxPacketSize0: 0x%02x", dev->dev_descriptor.bMaxPacketSize0);
929 usbi_dbg (" idVendor: 0x%04x", libusb_le16_to_cpu (dev->dev_descriptor.idVendor));
930 usbi_dbg (" idProduct: 0x%04x", libusb_le16_to_cpu (dev->dev_descriptor.idProduct));
931 usbi_dbg (" bcdDevice: 0x%04x", libusb_le16_to_cpu (dev->dev_descriptor.bcdDevice));
932 usbi_dbg (" iManufacturer: 0x%02x", dev->dev_descriptor.iManufacturer);
933 usbi_dbg (" iProduct: 0x%02x", dev->dev_descriptor.iProduct);
934 usbi_dbg (" iSerialNumber: 0x%02x", dev->dev_descriptor.iSerialNumber);
935 usbi_dbg (" bNumConfigurations: 0x%02x", dev->dev_descriptor.bNumConfigurations);
937 dev->can_enumerate = 1;
939 return LIBUSB_SUCCESS;
942 /* Returns 1 on success, 0 on failure. */
943 static bool get_device_port (io_service_t service, UInt8 *port) {
948 if (get_ioregistry_value_number (service, CFSTR("PortNum"), kCFNumberSInt8Type, port)) {
952 kresult = IORegistryEntryGetParentEntry (service, kIOServicePlane, &parent);
953 if (kIOReturnSuccess == kresult) {
954 ret = get_ioregistry_value_data (parent, CFSTR("port"), 1, port);
955 IOObjectRelease (parent);
961 /* Returns 1 on success, 0 on failure. */
962 static bool get_device_parent_sessionID(io_service_t service, UInt64 *parent_sessionID) {
966 /* Walk up the tree in the IOService plane until we find a parent that has a sessionID */
968 while((kresult = IORegistryEntryGetParentEntry (parent, kIOUSBPlane, &parent)) == kIOReturnSuccess) {
969 if (get_ioregistry_value_number (parent, CFSTR("sessionID"), kCFNumberSInt64Type, parent_sessionID)) {
975 /* We ran out of parents */
979 static enum libusb_error darwin_get_cached_device(io_service_t service, struct darwin_cached_device **cached_out,
980 UInt64 *old_session_id) {
981 struct darwin_cached_device *new_device;
982 UInt64 sessionID = 0, parent_sessionID = 0;
983 UInt32 locationID = 0;
984 enum libusb_error ret = LIBUSB_SUCCESS;
985 usb_device_t **device;
988 /* assuming sessionID != 0 normally (never seen it be 0) */
992 /* get some info from the io registry */
993 (void) get_ioregistry_value_number (service, CFSTR("sessionID"), kCFNumberSInt64Type, &sessionID);
994 (void) get_ioregistry_value_number (service, CFSTR("locationID"), kCFNumberSInt32Type, &locationID);
995 if (!get_device_port (service, &port)) {
996 usbi_dbg("could not get connected port number");
999 usbi_dbg("finding cached device for sessionID 0x%" PRIx64, sessionID);
1001 if (get_device_parent_sessionID(service, &parent_sessionID)) {
1002 usbi_dbg("parent sessionID: 0x%" PRIx64, parent_sessionID);
1005 usbi_mutex_lock(&darwin_cached_devices_lock);
1007 list_for_each_entry(new_device, &darwin_cached_devices, list, struct darwin_cached_device) {
1008 usbi_dbg("matching sessionID/locationID 0x%" PRIx64 "/0x%x against cached device with sessionID/locationID 0x%" PRIx64 "/0x%x",
1009 sessionID, locationID, new_device->session, new_device->location);
1010 if (new_device->location == locationID && new_device->in_reenumerate) {
1011 usbi_dbg ("found cached device with matching location that is being re-enumerated");
1012 *old_session_id = new_device->session;
1016 if (new_device->session == sessionID) {
1017 usbi_dbg("using cached device for device");
1018 *cached_out = new_device;
1026 usbi_dbg("caching new device with sessionID 0x%" PRIx64, sessionID);
1028 device = darwin_device_from_service (service);
1030 ret = LIBUSB_ERROR_NO_DEVICE;
1034 if (!(*old_session_id)) {
1035 new_device = calloc (1, sizeof (*new_device));
1037 ret = LIBUSB_ERROR_NO_MEM;
1041 /* add this device to the cached device list */
1042 list_add(&new_device->list, &darwin_cached_devices);
1044 (*device)->GetDeviceAddress (device, (USBDeviceAddress *)&new_device->address);
1046 /* keep a reference to this device */
1047 darwin_ref_cached_device(new_device);
1049 (*device)->GetLocationID (device, &new_device->location);
1050 new_device->port = port;
1051 new_device->parent_session = parent_sessionID;
1053 /* release the ref to old device's service */
1054 IOObjectRelease (new_device->service);
1057 /* keep track of devices regardless of if we successfully enumerate them to
1058 prevent them from being enumerated multiple times */
1059 *cached_out = new_device;
1061 new_device->session = sessionID;
1062 new_device->device = device;
1063 new_device->service = service;
1065 /* retain the service */
1066 IOObjectRetain (service);
1068 /* cache the device descriptor */
1069 ret = darwin_cache_device_descriptor(new_device);
1073 if (new_device->can_enumerate) {
1074 snprintf(new_device->sys_path, 20, "%03i-%04x-%04x-%02x-%02x", new_device->address,
1075 libusb_le16_to_cpu (new_device->dev_descriptor.idVendor),
1076 libusb_le16_to_cpu (new_device->dev_descriptor.idProduct),
1077 new_device->dev_descriptor.bDeviceClass, new_device->dev_descriptor.bDeviceSubClass);
1081 usbi_mutex_unlock(&darwin_cached_devices_lock);
1086 static enum libusb_error process_new_device (struct libusb_context *ctx, struct darwin_cached_device *cached_device,
1087 UInt64 old_session_id) {
1088 struct darwin_device_priv *priv;
1089 struct libusb_device *dev = NULL;
1091 enum libusb_error ret = LIBUSB_SUCCESS;
1094 /* check current active configuration (and cache the first configuration value--
1095 which may be used by claim_interface) */
1096 ret = darwin_check_configuration (ctx, cached_device);
1100 if (0 != old_session_id) {
1101 usbi_dbg ("re-using existing device from context %p for with session 0x%" PRIx64 " new session 0x%" PRIx64,
1102 ctx, old_session_id, cached_device->session);
1103 /* save the libusb device before the session id is updated */
1104 dev = usbi_get_device_by_session_id (ctx, (unsigned long) old_session_id);
1108 usbi_dbg ("allocating new device in context %p for with session 0x%" PRIx64,
1109 ctx, cached_device->session);
1111 dev = usbi_alloc_device(ctx, (unsigned long) cached_device->session);
1113 return LIBUSB_ERROR_NO_MEM;
1116 priv = usbi_get_device_priv(dev);
1118 priv->dev = cached_device;
1119 darwin_ref_cached_device (priv->dev);
1120 dev->port_number = cached_device->port;
1121 dev->bus_number = cached_device->location >> 24;
1122 assert(cached_device->address <= UINT8_MAX);
1123 dev->device_address = (uint8_t)cached_device->address;
1125 priv = usbi_get_device_priv(dev);
1128 static_assert(sizeof(dev->device_descriptor) == sizeof(cached_device->dev_descriptor),
1129 "mismatch between libusb and IOKit device descriptor sizes");
1130 memcpy(&dev->device_descriptor, &cached_device->dev_descriptor, LIBUSB_DT_DEVICE_SIZE);
1131 usbi_localize_device_descriptor(&dev->device_descriptor);
1132 dev->session_data = cached_device->session;
1134 if (cached_device->parent_session > 0) {
1135 dev->parent_dev = usbi_get_device_by_session_id (ctx, (unsigned long) cached_device->parent_session);
1137 dev->parent_dev = NULL;
1140 (*(priv->dev->device))->GetDeviceSpeed (priv->dev->device, &devSpeed);
1143 case kUSBDeviceSpeedLow: dev->speed = LIBUSB_SPEED_LOW; break;
1144 case kUSBDeviceSpeedFull: dev->speed = LIBUSB_SPEED_FULL; break;
1145 case kUSBDeviceSpeedHigh: dev->speed = LIBUSB_SPEED_HIGH; break;
1146 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
1147 case kUSBDeviceSpeedSuper: dev->speed = LIBUSB_SPEED_SUPER; break;
1149 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 101200
1150 case kUSBDeviceSpeedSuperPlus: dev->speed = LIBUSB_SPEED_SUPER_PLUS; break;
1153 usbi_warn (ctx, "Got unknown device speed %d", devSpeed);
1156 ret = usbi_sanitize_device (dev);
1160 usbi_dbg ("found device with address %d port = %d parent = %p at %p", dev->device_address,
1161 dev->port_number, (void *) dev->parent_dev, priv->dev->sys_path);
1165 if (!cached_device->in_reenumerate && 0 == ret) {
1166 usbi_connect_device (dev);
1168 libusb_unref_device (dev);
1174 static enum libusb_error darwin_scan_devices(struct libusb_context *ctx) {
1175 struct darwin_cached_device *cached_device;
1176 UInt64 old_session_id;
1177 io_iterator_t deviceIterator;
1178 io_service_t service;
1182 kresult = usb_setup_device_iterator (&deviceIterator, 0);
1183 if (kresult != kIOReturnSuccess)
1184 return darwin_to_libusb (kresult);
1186 while ((service = IOIteratorNext (deviceIterator))) {
1187 ret = darwin_get_cached_device (service, &cached_device, &old_session_id);
1188 if (ret < 0 || !cached_device->can_enumerate) {
1192 (void) process_new_device (ctx, cached_device, old_session_id);
1194 IOObjectRelease(service);
1197 IOObjectRelease(deviceIterator);
1199 return LIBUSB_SUCCESS;
1202 static int darwin_open (struct libusb_device_handle *dev_handle) {
1203 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1204 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1207 if (0 == dpriv->open_count) {
1208 /* try to open the device */
1209 kresult = (*(dpriv->device))->USBDeviceOpenSeize (dpriv->device);
1210 if (kresult != kIOReturnSuccess) {
1211 usbi_warn (HANDLE_CTX (dev_handle), "USBDeviceOpen: %s", darwin_error_str(kresult));
1213 if (kIOReturnExclusiveAccess != kresult) {
1214 return darwin_to_libusb (kresult);
1217 /* it is possible to perform some actions on a device that is not open so do not return an error */
1218 priv->is_open = false;
1220 priv->is_open = true;
1223 /* create async event source */
1224 kresult = (*(dpriv->device))->CreateDeviceAsyncEventSource (dpriv->device, &priv->cfSource);
1225 if (kresult != kIOReturnSuccess) {
1226 usbi_err (HANDLE_CTX (dev_handle), "CreateDeviceAsyncEventSource: %s", darwin_error_str(kresult));
1228 if (priv->is_open) {
1229 (*(dpriv->device))->USBDeviceClose (dpriv->device);
1232 priv->is_open = false;
1234 return darwin_to_libusb (kresult);
1237 CFRetain (libusb_darwin_acfl);
1239 /* add the cfSource to the aync run loop */
1240 CFRunLoopAddSource(libusb_darwin_acfl, priv->cfSource, kCFRunLoopCommonModes);
1243 /* device opened successfully */
1244 dpriv->open_count++;
1246 usbi_dbg ("device open for access");
1251 static void darwin_close (struct libusb_device_handle *dev_handle) {
1252 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1253 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1257 if (dpriv->open_count == 0) {
1258 /* something is probably very wrong if this is the case */
1259 usbi_err (HANDLE_CTX (dev_handle), "Close called on a device that was not open!");
1263 dpriv->open_count--;
1265 /* make sure all interfaces are released */
1266 for (i = 0 ; i < USB_MAXINTERFACES ; i++)
1267 if (dev_handle->claimed_interfaces & (1U << i))
1268 libusb_release_interface (dev_handle, i);
1270 if (0 == dpriv->open_count) {
1271 /* delete the device's async event source */
1272 if (priv->cfSource) {
1273 CFRunLoopRemoveSource (libusb_darwin_acfl, priv->cfSource, kCFRunLoopDefaultMode);
1274 CFRelease (priv->cfSource);
1275 priv->cfSource = NULL;
1276 CFRelease (libusb_darwin_acfl);
1279 if (priv->is_open) {
1280 /* close the device */
1281 kresult = (*(dpriv->device))->USBDeviceClose(dpriv->device);
1282 if (kresult != kIOReturnSuccess) {
1283 /* Log the fact that we had a problem closing the file, however failing a
1284 * close isn't really an error, so return success anyway */
1285 usbi_warn (HANDLE_CTX (dev_handle), "USBDeviceClose: %s", darwin_error_str(kresult));
1291 static int darwin_get_configuration(struct libusb_device_handle *dev_handle, uint8_t *config) {
1292 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1294 *config = dpriv->active_config;
1296 return LIBUSB_SUCCESS;
1299 static enum libusb_error darwin_set_configuration(struct libusb_device_handle *dev_handle, int config) {
1300 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1307 /* Setting configuration will invalidate the interface, so we need
1308 to reclaim it. First, dispose of existing interfaces, if any. */
1309 for (i = 0 ; i < USB_MAXINTERFACES ; i++)
1310 if (dev_handle->claimed_interfaces & (1U << i))
1311 darwin_release_interface (dev_handle, i);
1313 kresult = (*(dpriv->device))->SetConfiguration (dpriv->device, (UInt8)config);
1314 if (kresult != kIOReturnSuccess)
1315 return darwin_to_libusb (kresult);
1317 /* Reclaim any interfaces. */
1318 for (i = 0 ; i < USB_MAXINTERFACES ; i++)
1319 if (dev_handle->claimed_interfaces & (1U << i))
1320 darwin_claim_interface (dev_handle, i);
1322 dpriv->active_config = (UInt8)config;
1324 return LIBUSB_SUCCESS;
1327 static IOReturn darwin_get_interface (usb_device_t **darwin_device, uint8_t ifc, io_service_t *usbInterfacep) {
1328 IOUSBFindInterfaceRequest request;
1330 io_iterator_t interface_iterator;
1331 UInt8 bInterfaceNumber;
1334 *usbInterfacep = IO_OBJECT_NULL;
1336 /* Setup the Interface Request */
1337 request.bInterfaceClass = kIOUSBFindInterfaceDontCare;
1338 request.bInterfaceSubClass = kIOUSBFindInterfaceDontCare;
1339 request.bInterfaceProtocol = kIOUSBFindInterfaceDontCare;
1340 request.bAlternateSetting = kIOUSBFindInterfaceDontCare;
1342 kresult = (*(darwin_device))->CreateInterfaceIterator(darwin_device, &request, &interface_iterator);
1343 if (kresult != kIOReturnSuccess)
1346 while ((*usbInterfacep = IOIteratorNext(interface_iterator))) {
1347 /* find the interface number */
1348 ret = get_ioregistry_value_number (*usbInterfacep, CFSTR("bInterfaceNumber"), kCFNumberSInt8Type,
1351 if (ret && bInterfaceNumber == ifc) {
1355 (void) IOObjectRelease (*usbInterfacep);
1358 /* done with the interface iterator */
1359 IOObjectRelease(interface_iterator);
1361 return kIOReturnSuccess;
1364 static enum libusb_error get_endpoints (struct libusb_device_handle *dev_handle, uint8_t iface) {
1365 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1367 /* current interface */
1368 struct darwin_interface *cInterface = &priv->interfaces[iface];
1372 UInt8 numep, direction, number;
1373 UInt8 dont_care1, dont_care3;
1377 usbi_dbg ("building table of endpoints.");
1379 /* retrieve the total number of endpoints on this interface */
1380 kresult = (*(cInterface->interface))->GetNumEndpoints(cInterface->interface, &numep);
1381 if (kresult != kIOReturnSuccess) {
1382 usbi_err (HANDLE_CTX (dev_handle), "can't get number of endpoints for interface: %s", darwin_error_str(kresult));
1383 return darwin_to_libusb (kresult);
1386 /* iterate through pipe references */
1387 for (UInt8 i = 1 ; i <= numep ; i++) {
1388 kresult = (*(cInterface->interface))->GetPipeProperties(cInterface->interface, i, &direction, &number, &dont_care1,
1389 &dont_care2, &dont_care3);
1391 if (kresult != kIOReturnSuccess) {
1392 /* probably a buggy device. try to get the endpoint address from the descriptors */
1393 struct libusb_config_descriptor *config;
1394 const struct libusb_endpoint_descriptor *endpoint_desc;
1397 kresult = (*(cInterface->interface))->GetAlternateSetting (cInterface->interface, &alt_setting);
1398 if (kresult != kIOReturnSuccess) {
1399 usbi_err (HANDLE_CTX (dev_handle), "can't get alternate setting for interface");
1400 return darwin_to_libusb (kresult);
1403 rc = libusb_get_active_config_descriptor (dev_handle->dev, &config);
1404 if (LIBUSB_SUCCESS != rc) {
1408 endpoint_desc = config->interface[iface].altsetting[alt_setting].endpoint + i - 1;
1410 cInterface->endpoint_addrs[i - 1] = endpoint_desc->bEndpointAddress;
1412 cInterface->endpoint_addrs[i - 1] = (UInt8)(((kUSBIn == direction) << kUSBRqDirnShift) | (number & LIBUSB_ENDPOINT_ADDRESS_MASK));
1415 usbi_dbg ("interface: %i pipe %i: dir: %i number: %i", iface, i, cInterface->endpoint_addrs[i - 1] >> kUSBRqDirnShift,
1416 cInterface->endpoint_addrs[i - 1] & LIBUSB_ENDPOINT_ADDRESS_MASK);
1419 cInterface->num_endpoints = numep;
1421 return LIBUSB_SUCCESS;
1424 static int darwin_claim_interface(struct libusb_device_handle *dev_handle, uint8_t iface) {
1425 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1426 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1427 io_service_t usbInterface = IO_OBJECT_NULL;
1429 enum libusb_error ret;
1430 IOCFPlugInInterface **plugInInterface = NULL;
1433 /* current interface */
1434 struct darwin_interface *cInterface = &priv->interfaces[iface];
1436 kresult = darwin_get_interface (dpriv->device, iface, &usbInterface);
1437 if (kresult != kIOReturnSuccess)
1438 return darwin_to_libusb (kresult);
1440 /* make sure we have an interface */
1441 if (!usbInterface && dpriv->first_config != 0) {
1442 usbi_info (HANDLE_CTX (dev_handle), "no interface found; setting configuration: %d", dpriv->first_config);
1444 /* set the configuration */
1445 ret = darwin_set_configuration (dev_handle, (int) dpriv->first_config);
1446 if (ret != LIBUSB_SUCCESS) {
1447 usbi_err (HANDLE_CTX (dev_handle), "could not set configuration");
1451 kresult = darwin_get_interface (dpriv->device, iface, &usbInterface);
1452 if (kresult != kIOReturnSuccess) {
1453 usbi_err (HANDLE_CTX (dev_handle), "darwin_get_interface: %s", darwin_error_str(kresult));
1454 return darwin_to_libusb (kresult);
1458 if (!usbInterface) {
1459 usbi_err (HANDLE_CTX (dev_handle), "interface not found");
1460 return LIBUSB_ERROR_NOT_FOUND;
1463 /* get an interface to the device's interface */
1464 kresult = IOCreatePlugInInterfaceForService (usbInterface, kIOUSBInterfaceUserClientTypeID,
1465 kIOCFPlugInInterfaceID, &plugInInterface, &score);
1467 /* ignore release error */
1468 (void)IOObjectRelease (usbInterface);
1470 if (kresult != kIOReturnSuccess) {
1471 usbi_err (HANDLE_CTX (dev_handle), "IOCreatePlugInInterfaceForService: %s", darwin_error_str(kresult));
1472 return darwin_to_libusb (kresult);
1475 if (!plugInInterface) {
1476 usbi_err (HANDLE_CTX (dev_handle), "plugin interface not found");
1477 return LIBUSB_ERROR_NOT_FOUND;
1480 /* Do the actual claim */
1481 kresult = (*plugInInterface)->QueryInterface(plugInInterface,
1482 CFUUIDGetUUIDBytes(InterfaceInterfaceID),
1483 (LPVOID)&cInterface->interface);
1484 /* We no longer need the intermediate plug-in */
1485 /* Use release instead of IODestroyPlugInInterface to avoid stopping IOServices associated with this device */
1486 (*plugInInterface)->Release (plugInInterface);
1487 if (kresult != kIOReturnSuccess || !cInterface->interface) {
1488 usbi_err (HANDLE_CTX (dev_handle), "QueryInterface: %s", darwin_error_str(kresult));
1489 return darwin_to_libusb (kresult);
1492 /* claim the interface */
1493 kresult = (*(cInterface->interface))->USBInterfaceOpen(cInterface->interface);
1494 if (kresult != kIOReturnSuccess) {
1495 usbi_err (HANDLE_CTX (dev_handle), "USBInterfaceOpen: %s", darwin_error_str(kresult));
1496 return darwin_to_libusb (kresult);
1499 /* update list of endpoints */
1500 ret = get_endpoints (dev_handle, iface);
1502 /* this should not happen */
1503 darwin_release_interface (dev_handle, iface);
1504 usbi_err (HANDLE_CTX (dev_handle), "could not build endpoint table");
1508 cInterface->cfSource = NULL;
1510 /* create async event source */
1511 kresult = (*(cInterface->interface))->CreateInterfaceAsyncEventSource (cInterface->interface, &cInterface->cfSource);
1512 if (kresult != kIOReturnSuccess) {
1513 usbi_err (HANDLE_CTX (dev_handle), "could not create async event source");
1515 /* can't continue without an async event source */
1516 (void)darwin_release_interface (dev_handle, iface);
1518 return darwin_to_libusb (kresult);
1521 /* add the cfSource to the async thread's run loop */
1522 CFRunLoopAddSource(libusb_darwin_acfl, cInterface->cfSource, kCFRunLoopDefaultMode);
1524 usbi_dbg ("interface opened");
1526 return LIBUSB_SUCCESS;
1529 static int darwin_release_interface(struct libusb_device_handle *dev_handle, uint8_t iface) {
1530 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1533 /* current interface */
1534 struct darwin_interface *cInterface = &priv->interfaces[iface];
1536 /* Check to see if an interface is open */
1537 if (!cInterface->interface)
1538 return LIBUSB_SUCCESS;
1540 /* clean up endpoint data */
1541 cInterface->num_endpoints = 0;
1543 /* delete the interface's async event source */
1544 if (cInterface->cfSource) {
1545 CFRunLoopRemoveSource (libusb_darwin_acfl, cInterface->cfSource, kCFRunLoopDefaultMode);
1546 CFRelease (cInterface->cfSource);
1549 kresult = (*(cInterface->interface))->USBInterfaceClose(cInterface->interface);
1550 if (kresult != kIOReturnSuccess)
1551 usbi_warn (HANDLE_CTX (dev_handle), "USBInterfaceClose: %s", darwin_error_str(kresult));
1553 kresult = (*(cInterface->interface))->Release(cInterface->interface);
1554 if (kresult != kIOReturnSuccess)
1555 usbi_warn (HANDLE_CTX (dev_handle), "Release: %s", darwin_error_str(kresult));
1557 cInterface->interface = (usb_interface_t **) IO_OBJECT_NULL;
1559 return darwin_to_libusb (kresult);
1562 static int darwin_set_interface_altsetting(struct libusb_device_handle *dev_handle, uint8_t iface, uint8_t altsetting) {
1563 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1565 enum libusb_error ret;
1567 /* current interface */
1568 struct darwin_interface *cInterface = &priv->interfaces[iface];
1570 if (!cInterface->interface)
1571 return LIBUSB_ERROR_NO_DEVICE;
1573 kresult = (*(cInterface->interface))->SetAlternateInterface (cInterface->interface, altsetting);
1574 /* If a device only supports a default setting for the specified interface, then a STALL
1575 (kIOUSBPipeStalled) may be returned. Ref: USB 2.0 specs 9.4.10.
1576 Mimick the behaviour in e.g. the Linux kernel: in such case, reset all endpoints,
1577 and hide errors.Current implementation resets the entire device, instead of single
1578 interface, due to historic reasons. */
1579 if (kresult != kIOReturnSuccess) {
1580 usbi_warn (HANDLE_CTX (dev_handle), "SetAlternateInterface: %s", darwin_error_str(kresult));
1581 darwin_reset_device (dev_handle);
1584 /* update list of endpoints */
1585 ret = get_endpoints (dev_handle, iface);
1587 /* this should not happen */
1588 darwin_release_interface (dev_handle, iface);
1589 usbi_err (HANDLE_CTX (dev_handle), "could not build endpoint table");
1595 static int darwin_clear_halt(struct libusb_device_handle *dev_handle, unsigned char endpoint) {
1596 /* current interface */
1597 struct darwin_interface *cInterface;
1601 /* determine the interface/endpoint to use */
1602 if (ep_to_pipeRef (dev_handle, endpoint, &pipeRef, NULL, &cInterface) != 0) {
1603 usbi_err (HANDLE_CTX (dev_handle), "endpoint not found on any open interface");
1605 return LIBUSB_ERROR_NOT_FOUND;
1608 /* newer versions of darwin support clearing additional bits on the device's endpoint */
1609 kresult = (*(cInterface->interface))->ClearPipeStallBothEnds(cInterface->interface, pipeRef);
1610 if (kresult != kIOReturnSuccess)
1611 usbi_warn (HANDLE_CTX (dev_handle), "ClearPipeStall: %s", darwin_error_str (kresult));
1613 return darwin_to_libusb (kresult);
1616 static int darwin_restore_state (struct libusb_device_handle *dev_handle, int8_t active_config,
1617 unsigned long claimed_interfaces) {
1618 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1619 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1620 int open_count = dpriv->open_count;
1623 /* clear claimed interfaces temporarily */
1624 dev_handle->claimed_interfaces = 0;
1626 /* close and re-open the device */
1627 priv->is_open = false;
1628 dpriv->open_count = 1;
1630 /* clean up open interfaces */
1631 (void) darwin_close (dev_handle);
1633 /* re-open the device */
1634 ret = darwin_open (dev_handle);
1635 dpriv->open_count = open_count;
1636 if (LIBUSB_SUCCESS != ret) {
1637 /* could not restore configuration */
1638 return LIBUSB_ERROR_NOT_FOUND;
1641 if (dpriv->active_config != active_config) {
1642 usbi_dbg ("darwin/restore_state: restoring configuration %d...", active_config);
1644 ret = darwin_set_configuration (dev_handle, active_config);
1645 if (LIBUSB_SUCCESS != ret) {
1646 usbi_dbg ("darwin/restore_state: could not restore configuration");
1647 return LIBUSB_ERROR_NOT_FOUND;
1651 usbi_dbg ("darwin/restore_state: reclaiming interfaces");
1653 if (claimed_interfaces) {
1654 for (uint8_t iface = 0 ; iface < USB_MAXINTERFACES ; ++iface) {
1655 if (!(claimed_interfaces & (1U << iface))) {
1659 usbi_dbg ("darwin/restore_state: re-claiming interface %u", iface);
1661 ret = darwin_claim_interface (dev_handle, iface);
1662 if (LIBUSB_SUCCESS != ret) {
1663 usbi_dbg ("darwin/restore_state: could not claim interface %u", iface);
1664 return LIBUSB_ERROR_NOT_FOUND;
1667 dev_handle->claimed_interfaces |= 1U << iface;
1671 usbi_dbg ("darwin/restore_state: device state restored");
1673 return LIBUSB_SUCCESS;
1676 static int darwin_reenumerate_device (struct libusb_device_handle *dev_handle, bool capture) {
1677 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1678 unsigned long claimed_interfaces = dev_handle->claimed_interfaces;
1679 int8_t active_config = dpriv->active_config;
1681 IOUSBDeviceDescriptor descriptor;
1682 IOUSBConfigurationDescriptorPtr cached_configuration;
1683 IOUSBConfigurationDescriptor *cached_configurations;
1688 if (dpriv->in_reenumerate) {
1689 /* ack, two (or more) threads are trying to reset the device! abort! */
1690 return LIBUSB_ERROR_NOT_FOUND;
1693 dpriv->in_reenumerate = true;
1695 /* store copies of descriptors so they can be compared after the reset */
1696 memcpy (&descriptor, &dpriv->dev_descriptor, sizeof (descriptor));
1697 cached_configurations = alloca (sizeof (*cached_configurations) * descriptor.bNumConfigurations);
1699 for (i = 0 ; i < descriptor.bNumConfigurations ; ++i) {
1700 (*(dpriv->device))->GetConfigurationDescriptorPtr (dpriv->device, i, &cached_configuration);
1701 memcpy (cached_configurations + i, cached_configuration, sizeof (cached_configurations[i]));
1704 /* if we need to release capture */
1705 if (HAS_CAPTURE_DEVICE()) {
1707 options |= kUSBReEnumerateCaptureDeviceMask;
1713 /* from macOS 10.11 ResetDevice no longer does anything so just use USBDeviceReEnumerate */
1714 kresult = (*(dpriv->device))->USBDeviceReEnumerate (dpriv->device, options);
1715 if (kresult != kIOReturnSuccess) {
1716 usbi_err (HANDLE_CTX (dev_handle), "USBDeviceReEnumerate: %s", darwin_error_str (kresult));
1717 dpriv->in_reenumerate = false;
1718 return darwin_to_libusb (kresult);
1721 /* capture mode does not re-enumerate but it does require re-open */
1723 usbi_dbg ("darwin/reenumerate_device: restoring state...");
1724 dpriv->in_reenumerate = false;
1725 return darwin_restore_state (dev_handle, active_config, claimed_interfaces);
1728 usbi_dbg ("darwin/reenumerate_device: waiting for re-enumeration to complete...");
1731 while (dpriv->in_reenumerate) {
1732 struct timespec delay = {.tv_sec = 0, .tv_nsec = 1000};
1733 nanosleep (&delay, NULL);
1734 if (time++ >= DARWIN_REENUMERATE_TIMEOUT_US) {
1735 usbi_err (HANDLE_CTX (dev_handle), "darwin/reenumerate_device: timeout waiting for reenumerate");
1736 dpriv->in_reenumerate = false;
1737 return LIBUSB_ERROR_TIMEOUT;
1741 /* compare descriptors */
1742 usbi_dbg ("darwin/reenumerate_device: checking whether descriptors changed");
1744 if (memcmp (&descriptor, &dpriv->dev_descriptor, sizeof (descriptor))) {
1745 /* device descriptor changed. need to return not found. */
1746 usbi_dbg ("darwin/reenumerate_device: device descriptor changed");
1747 return LIBUSB_ERROR_NOT_FOUND;
1750 for (i = 0 ; i < descriptor.bNumConfigurations ; ++i) {
1751 (void) (*(dpriv->device))->GetConfigurationDescriptorPtr (dpriv->device, i, &cached_configuration);
1752 if (memcmp (cached_configuration, cached_configurations + i, sizeof (cached_configurations[i]))) {
1753 usbi_dbg ("darwin/reenumerate_device: configuration descriptor %d changed", i);
1754 return LIBUSB_ERROR_NOT_FOUND;
1758 usbi_dbg ("darwin/reenumerate_device: device reset complete. restoring state...");
1760 return darwin_restore_state (dev_handle, active_config, claimed_interfaces);
1763 static int darwin_reset_device (struct libusb_device_handle *dev_handle) {
1764 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1767 if (dpriv->capture_count > 0) {
1768 /* we have to use ResetDevice as USBDeviceReEnumerate() loses the authorization for capture */
1769 kresult = (*(dpriv->device))->ResetDevice (dpriv->device);
1770 return darwin_to_libusb (kresult);
1772 return darwin_reenumerate_device (dev_handle, false);
1776 static int darwin_kernel_driver_active(struct libusb_device_handle *dev_handle, uint8_t interface) {
1777 enum libusb_error ret = darwin_claim_interface (dev_handle, interface);
1778 if (ret == LIBUSB_SUCCESS) {
1779 darwin_release_interface (dev_handle, interface);
1781 return (ret == LIBUSB_ERROR_ACCESS);
1784 static void darwin_destroy_device(struct libusb_device *dev) {
1785 struct darwin_device_priv *dpriv = usbi_get_device_priv(dev);
1788 /* need to hold the lock in case this is the last reference to the device */
1789 usbi_mutex_lock(&darwin_cached_devices_lock);
1790 darwin_deref_cached_device (dpriv->dev);
1792 usbi_mutex_unlock(&darwin_cached_devices_lock);
1796 static int submit_bulk_transfer(struct usbi_transfer *itransfer) {
1797 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1800 uint8_t transferType;
1802 uint16_t maxPacketSize;
1804 struct darwin_interface *cInterface;
1805 #if InterfaceVersion >= 550
1806 IOUSBEndpointProperties pipeProperties = {.bVersion = kUSBEndpointPropertiesVersion3};
1808 /* None of the values below are used in libusb for bulk transfers */
1809 uint8_t direction, number, interval;
1812 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
1813 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
1815 return LIBUSB_ERROR_NOT_FOUND;
1818 #if InterfaceVersion >= 550
1819 ret = (*(cInterface->interface))->GetPipePropertiesV3 (cInterface->interface, pipeRef, &pipeProperties);
1821 transferType = pipeProperties.bTransferType;
1822 maxPacketSize = pipeProperties.wMaxPacketSize;
1824 ret = (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
1825 &transferType, &maxPacketSize, &interval);
1829 usbi_err (TRANSFER_CTX (transfer), "bulk transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
1830 darwin_error_str(ret), ret);
1831 return darwin_to_libusb (ret);
1834 if (0 != (transfer->length % maxPacketSize)) {
1835 /* do not need a zero packet */
1836 transfer->flags &= ~LIBUSB_TRANSFER_ADD_ZERO_PACKET;
1839 /* submit the request */
1840 /* timeouts are unavailable on interrupt endpoints */
1841 if (transferType == kUSBInterrupt) {
1842 if (IS_XFERIN(transfer))
1843 ret = (*(cInterface->interface))->ReadPipeAsync(cInterface->interface, pipeRef, transfer->buffer,
1844 (UInt32)transfer->length, darwin_async_io_callback, itransfer);
1846 ret = (*(cInterface->interface))->WritePipeAsync(cInterface->interface, pipeRef, transfer->buffer,
1847 (UInt32)transfer->length, darwin_async_io_callback, itransfer);
1849 itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
1851 if (IS_XFERIN(transfer))
1852 ret = (*(cInterface->interface))->ReadPipeAsyncTO(cInterface->interface, pipeRef, transfer->buffer,
1853 (UInt32)transfer->length, transfer->timeout, transfer->timeout,
1854 darwin_async_io_callback, itransfer);
1856 ret = (*(cInterface->interface))->WritePipeAsyncTO(cInterface->interface, pipeRef, transfer->buffer,
1857 (UInt32)transfer->length, transfer->timeout, transfer->timeout,
1858 darwin_async_io_callback, itransfer);
1862 usbi_err (TRANSFER_CTX (transfer), "bulk transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
1863 darwin_error_str(ret), ret);
1865 return darwin_to_libusb (ret);
1868 #if InterfaceVersion >= 550
1869 static int submit_stream_transfer(struct usbi_transfer *itransfer) {
1870 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1871 struct darwin_interface *cInterface;
1875 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
1876 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
1878 return LIBUSB_ERROR_NOT_FOUND;
1881 itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
1883 if (IS_XFERIN(transfer))
1884 ret = (*(cInterface->interface))->ReadStreamsPipeAsyncTO(cInterface->interface, pipeRef, itransfer->stream_id,
1885 transfer->buffer, (UInt32)transfer->length, transfer->timeout,
1886 transfer->timeout, darwin_async_io_callback, itransfer);
1888 ret = (*(cInterface->interface))->WriteStreamsPipeAsyncTO(cInterface->interface, pipeRef, itransfer->stream_id,
1889 transfer->buffer, (UInt32)transfer->length, transfer->timeout,
1890 transfer->timeout, darwin_async_io_callback, itransfer);
1893 usbi_err (TRANSFER_CTX (transfer), "bulk stream transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
1894 darwin_error_str(ret), ret);
1896 return darwin_to_libusb (ret);
1900 static int submit_iso_transfer(struct usbi_transfer *itransfer) {
1901 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1902 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
1905 uint8_t direction, number, interval, pipeRef, transferType;
1906 uint16_t maxPacketSize;
1908 AbsoluteTime atTime;
1911 struct darwin_interface *cInterface;
1913 /* construct an array of IOUSBIsocFrames, reuse the old one if the sizes are the same */
1914 if (tpriv->num_iso_packets != transfer->num_iso_packets) {
1915 free(tpriv->isoc_framelist);
1916 tpriv->isoc_framelist = NULL;
1919 if (!tpriv->isoc_framelist) {
1920 tpriv->num_iso_packets = transfer->num_iso_packets;
1921 tpriv->isoc_framelist = (IOUSBIsocFrame*) calloc ((size_t)transfer->num_iso_packets, sizeof(IOUSBIsocFrame));
1922 if (!tpriv->isoc_framelist)
1923 return LIBUSB_ERROR_NO_MEM;
1926 /* copy the frame list from the libusb descriptor (the structures differ only is member order) */
1927 for (i = 0 ; i < transfer->num_iso_packets ; i++) {
1928 unsigned int length = transfer->iso_packet_desc[i].length;
1929 assert(length <= UINT16_MAX);
1930 tpriv->isoc_framelist[i].frReqCount = (UInt16)length;
1933 /* determine the interface/endpoint to use */
1934 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
1935 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
1937 return LIBUSB_ERROR_NOT_FOUND;
1940 /* determine the properties of this endpoint and the speed of the device */
1941 (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
1942 &transferType, &maxPacketSize, &interval);
1944 /* Last but not least we need the bus frame number */
1945 kresult = (*(cInterface->interface))->GetBusFrameNumber(cInterface->interface, &frame, &atTime);
1946 if (kresult != kIOReturnSuccess) {
1947 usbi_err (TRANSFER_CTX (transfer), "failed to get bus frame number: %d", kresult);
1948 free(tpriv->isoc_framelist);
1949 tpriv->isoc_framelist = NULL;
1951 return darwin_to_libusb (kresult);
1954 (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
1955 &transferType, &maxPacketSize, &interval);
1957 /* schedule for a frame a little in the future */
1960 if (cInterface->frames[transfer->endpoint] && frame < cInterface->frames[transfer->endpoint])
1961 frame = cInterface->frames[transfer->endpoint];
1963 /* submit the request */
1964 if (IS_XFERIN(transfer))
1965 kresult = (*(cInterface->interface))->ReadIsochPipeAsync(cInterface->interface, pipeRef, transfer->buffer, frame,
1966 (UInt32)transfer->num_iso_packets, tpriv->isoc_framelist, darwin_async_io_callback,
1969 kresult = (*(cInterface->interface))->WriteIsochPipeAsync(cInterface->interface, pipeRef, transfer->buffer, frame,
1970 (UInt32)transfer->num_iso_packets, tpriv->isoc_framelist, darwin_async_io_callback,
1973 if (LIBUSB_SPEED_FULL == transfer->dev_handle->dev->speed)
1975 cInterface->frames[transfer->endpoint] = frame + (UInt32)transfer->num_iso_packets * (1U << (interval - 1));
1977 /* High/super speed */
1978 cInterface->frames[transfer->endpoint] = frame + (UInt32)transfer->num_iso_packets * (1U << (interval - 1)) / 8;
1980 if (kresult != kIOReturnSuccess) {
1981 usbi_err (TRANSFER_CTX (transfer), "isochronous transfer failed (dir: %s): %s", IS_XFERIN(transfer) ? "In" : "Out",
1982 darwin_error_str(kresult));
1983 free (tpriv->isoc_framelist);
1984 tpriv->isoc_framelist = NULL;
1987 return darwin_to_libusb (kresult);
1990 static int submit_control_transfer(struct usbi_transfer *itransfer) {
1991 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1992 struct libusb_control_setup *setup = (struct libusb_control_setup *) transfer->buffer;
1993 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
1994 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
1998 memset(&tpriv->req, 0, sizeof(tpriv->req));
2000 /* IOUSBDeviceInterface expects the request in cpu endianness */
2001 tpriv->req.bmRequestType = setup->bmRequestType;
2002 tpriv->req.bRequest = setup->bRequest;
2003 /* these values should be in bus order from libusb_fill_control_setup */
2004 tpriv->req.wValue = OSSwapLittleToHostInt16 (setup->wValue);
2005 tpriv->req.wIndex = OSSwapLittleToHostInt16 (setup->wIndex);
2006 tpriv->req.wLength = OSSwapLittleToHostInt16 (setup->wLength);
2007 /* data is stored after the libusb control block */
2008 tpriv->req.pData = transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE;
2009 tpriv->req.completionTimeout = transfer->timeout;
2010 tpriv->req.noDataTimeout = transfer->timeout;
2012 itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
2014 /* all transfers in libusb-1.0 are async */
2016 if (transfer->endpoint) {
2017 struct darwin_interface *cInterface;
2020 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
2021 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
2023 return LIBUSB_ERROR_NOT_FOUND;
2026 kresult = (*(cInterface->interface))->ControlRequestAsyncTO (cInterface->interface, pipeRef, &(tpriv->req), darwin_async_io_callback, itransfer);
2028 /* control request on endpoint 0 */
2029 kresult = (*(dpriv->device))->DeviceRequestAsyncTO(dpriv->device, &(tpriv->req), darwin_async_io_callback, itransfer);
2031 if (kresult != kIOReturnSuccess)
2032 usbi_err (TRANSFER_CTX (transfer), "control request failed: %s", darwin_error_str(kresult));
2034 return darwin_to_libusb (kresult);
2037 static int darwin_submit_transfer(struct usbi_transfer *itransfer) {
2038 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2040 switch (transfer->type) {
2041 case LIBUSB_TRANSFER_TYPE_CONTROL:
2042 return submit_control_transfer(itransfer);
2043 case LIBUSB_TRANSFER_TYPE_BULK:
2044 case LIBUSB_TRANSFER_TYPE_INTERRUPT:
2045 return submit_bulk_transfer(itransfer);
2046 case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
2047 return submit_iso_transfer(itransfer);
2048 case LIBUSB_TRANSFER_TYPE_BULK_STREAM:
2049 #if InterfaceVersion >= 550
2050 return submit_stream_transfer(itransfer);
2052 usbi_err (TRANSFER_CTX(transfer), "IOUSBFamily version does not support bulk stream transfers");
2053 return LIBUSB_ERROR_NOT_SUPPORTED;
2056 usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
2057 return LIBUSB_ERROR_INVALID_PARAM;
2061 static int cancel_control_transfer(struct usbi_transfer *itransfer) {
2062 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2063 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
2066 usbi_warn (ITRANSFER_CTX (itransfer), "aborting all transactions control pipe");
2069 return LIBUSB_ERROR_NO_DEVICE;
2071 kresult = (*(dpriv->device))->USBDeviceAbortPipeZero (dpriv->device);
2073 return darwin_to_libusb (kresult);
2076 static int darwin_abort_transfers (struct usbi_transfer *itransfer) {
2077 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2078 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
2079 struct darwin_interface *cInterface;
2080 uint8_t pipeRef, iface;
2083 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, &iface, &cInterface) != 0) {
2084 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
2086 return LIBUSB_ERROR_NOT_FOUND;
2090 return LIBUSB_ERROR_NO_DEVICE;
2092 usbi_warn (ITRANSFER_CTX (itransfer), "aborting all transactions on interface %d pipe %d", iface, pipeRef);
2094 /* abort transactions */
2095 #if InterfaceVersion >= 550
2096 if (LIBUSB_TRANSFER_TYPE_BULK_STREAM == transfer->type)
2097 (*(cInterface->interface))->AbortStreamsPipe (cInterface->interface, pipeRef, itransfer->stream_id);
2100 (*(cInterface->interface))->AbortPipe (cInterface->interface, pipeRef);
2102 usbi_dbg ("calling clear pipe stall to clear the data toggle bit");
2104 /* newer versions of darwin support clearing additional bits on the device's endpoint */
2105 kresult = (*(cInterface->interface))->ClearPipeStallBothEnds(cInterface->interface, pipeRef);
2107 return darwin_to_libusb (kresult);
2110 static int darwin_cancel_transfer(struct usbi_transfer *itransfer) {
2111 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2113 switch (transfer->type) {
2114 case LIBUSB_TRANSFER_TYPE_CONTROL:
2115 return cancel_control_transfer(itransfer);
2116 case LIBUSB_TRANSFER_TYPE_BULK:
2117 case LIBUSB_TRANSFER_TYPE_INTERRUPT:
2118 case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
2119 return darwin_abort_transfers (itransfer);
2121 usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
2122 return LIBUSB_ERROR_INVALID_PARAM;
2126 static void darwin_async_io_callback (void *refcon, IOReturn result, void *arg0) {
2127 struct usbi_transfer *itransfer = (struct usbi_transfer *)refcon;
2128 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2129 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
2131 usbi_dbg ("an async io operation has completed");
2133 /* if requested write a zero packet */
2134 if (kIOReturnSuccess == result && IS_XFEROUT(transfer) && transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) {
2135 struct darwin_interface *cInterface;
2138 (void) ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface);
2140 (*(cInterface->interface))->WritePipe (cInterface->interface, pipeRef, transfer->buffer, 0);
2143 tpriv->result = result;
2144 tpriv->size = (UInt32) (uintptr_t) arg0;
2146 /* signal the core that this transfer is complete */
2147 usbi_signal_transfer_completion(itransfer);
2150 static enum libusb_transfer_status darwin_transfer_status (struct usbi_transfer *itransfer, IOReturn result) {
2151 if (itransfer->timeout_flags & USBI_TRANSFER_TIMED_OUT)
2152 result = kIOUSBTransactionTimeout;
2155 case kIOReturnUnderrun:
2156 case kIOReturnSuccess:
2157 return LIBUSB_TRANSFER_COMPLETED;
2158 case kIOReturnAborted:
2159 return LIBUSB_TRANSFER_CANCELLED;
2160 case kIOUSBPipeStalled:
2161 usbi_dbg ("transfer error: pipe is stalled");
2162 return LIBUSB_TRANSFER_STALL;
2163 case kIOReturnOverrun:
2164 usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: data overrun");
2165 return LIBUSB_TRANSFER_OVERFLOW;
2166 case kIOUSBTransactionTimeout:
2167 usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: timed out");
2168 itransfer->timeout_flags |= USBI_TRANSFER_TIMED_OUT;
2169 return LIBUSB_TRANSFER_TIMED_OUT;
2171 usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: %s (value = 0x%08x)", darwin_error_str (result), result);
2172 return LIBUSB_TRANSFER_ERROR;
2176 static int darwin_handle_transfer_completion (struct usbi_transfer *itransfer) {
2177 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2178 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
2179 const unsigned char max_transfer_type = LIBUSB_TRANSFER_TYPE_BULK_STREAM;
2180 const char *transfer_types[] = {"control", "isoc", "bulk", "interrupt", "bulk-stream", NULL};
2181 bool is_isoc = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS == transfer->type;
2183 if (transfer->type > max_transfer_type) {
2184 usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
2185 return LIBUSB_ERROR_INVALID_PARAM;
2188 if (NULL == tpriv) {
2189 usbi_err (TRANSFER_CTX(transfer), "malformed request is missing transfer priv");
2190 return LIBUSB_ERROR_INVALID_PARAM;
2193 usbi_dbg ("handling transfer completion type %s with kernel status %d", transfer_types[transfer->type], tpriv->result);
2195 if (kIOReturnSuccess == tpriv->result || kIOReturnUnderrun == tpriv->result || kIOUSBTransactionTimeout == tpriv->result) {
2196 if (is_isoc && tpriv->isoc_framelist) {
2197 /* copy isochronous results back */
2199 for (int i = 0; i < transfer->num_iso_packets ; i++) {
2200 struct libusb_iso_packet_descriptor *lib_desc = &transfer->iso_packet_desc[i];
2201 lib_desc->status = darwin_transfer_status (itransfer, tpriv->isoc_framelist[i].frStatus);
2202 lib_desc->actual_length = tpriv->isoc_framelist[i].frActCount;
2204 } else if (!is_isoc) {
2205 itransfer->transferred += tpriv->size;
2209 /* it is ok to handle cancelled transfers without calling usbi_handle_transfer_cancellation (we catch timeout transfers) */
2210 return usbi_handle_transfer_completion (itransfer, darwin_transfer_status (itransfer, tpriv->result));
2213 #if !defined(HAVE_CLOCK_GETTIME)
2214 void usbi_get_monotonic_time(struct timespec *tp) {
2215 mach_timespec_t sys_time;
2217 /* use system boot time as reference for the monotonic clock */
2218 clock_get_time (clock_monotonic, &sys_time);
2220 tp->tv_sec = sys_time.tv_sec;
2221 tp->tv_nsec = sys_time.tv_nsec;
2224 void usbi_get_real_time(struct timespec *tp) {
2225 mach_timespec_t sys_time;
2227 /* CLOCK_REALTIME represents time since the epoch */
2228 clock_get_time (clock_realtime, &sys_time);
2230 tp->tv_sec = sys_time.tv_sec;
2231 tp->tv_nsec = sys_time.tv_nsec;
2235 #if InterfaceVersion >= 550
2236 static int darwin_alloc_streams (struct libusb_device_handle *dev_handle, uint32_t num_streams, unsigned char *endpoints,
2237 int num_endpoints) {
2238 struct darwin_interface *cInterface;
2239 UInt32 supportsStreams;
2243 /* find the minimum number of supported streams on the endpoint list */
2244 for (i = 0 ; i < num_endpoints ; ++i) {
2245 if (0 != (rc = ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface))) {
2249 (*(cInterface->interface))->SupportsStreams (cInterface->interface, pipeRef, &supportsStreams);
2250 if (num_streams > supportsStreams)
2251 num_streams = supportsStreams;
2254 /* it is an error if any endpoint in endpoints does not support streams */
2255 if (0 == num_streams)
2256 return LIBUSB_ERROR_INVALID_PARAM;
2258 /* create the streams */
2259 for (i = 0 ; i < num_endpoints ; ++i) {
2260 (void) ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface);
2262 rc = (*(cInterface->interface))->CreateStreams (cInterface->interface, pipeRef, num_streams);
2263 if (kIOReturnSuccess != rc)
2264 return darwin_to_libusb(rc);
2267 assert(num_streams <= INT_MAX);
2268 return (int)num_streams;
2271 static int darwin_free_streams (struct libusb_device_handle *dev_handle, unsigned char *endpoints, int num_endpoints) {
2272 struct darwin_interface *cInterface;
2273 UInt32 supportsStreams;
2277 for (int i = 0 ; i < num_endpoints ; ++i) {
2278 if (0 != (rc = ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface)))
2281 (*(cInterface->interface))->SupportsStreams (cInterface->interface, pipeRef, &supportsStreams);
2282 if (0 == supportsStreams)
2283 return LIBUSB_ERROR_INVALID_PARAM;
2285 rc = (*(cInterface->interface))->CreateStreams (cInterface->interface, pipeRef, 0);
2286 if (kIOReturnSuccess != rc)
2287 return darwin_to_libusb(rc);
2290 return LIBUSB_SUCCESS;
2294 #if InterfaceVersion >= 700
2296 /* macOS APIs for getting entitlement values */
2299 #include <Security/Security.h>
2301 typedef struct __SecTask *SecTaskRef;
2302 extern SecTaskRef SecTaskCreateFromSelf(CFAllocatorRef allocator);
2303 extern CFTypeRef SecTaskCopyValueForEntitlement(SecTaskRef task, CFStringRef entitlement, CFErrorRef *error);
2306 static bool darwin_has_capture_entitlements (void) {
2311 task = SecTaskCreateFromSelf (kCFAllocatorDefault);
2315 value = SecTaskCopyValueForEntitlement(task, CFSTR("com.apple.vm.device-access"), NULL);
2317 entitled = value && (CFGetTypeID (value) == CFBooleanGetTypeID ()) && CFBooleanGetValue (value);
2324 static int darwin_reload_device (struct libusb_device_handle *dev_handle) {
2325 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
2326 enum libusb_error err;
2328 usbi_mutex_lock(&darwin_cached_devices_lock);
2329 (*(dpriv->device))->Release(dpriv->device);
2330 dpriv->device = darwin_device_from_service (dpriv->service);
2331 if (!dpriv->device) {
2332 err = LIBUSB_ERROR_NO_DEVICE;
2334 err = LIBUSB_SUCCESS;
2336 usbi_mutex_unlock(&darwin_cached_devices_lock);
2341 /* On macOS, we capture an entire device at once, not individual interfaces. */
2343 static int darwin_detach_kernel_driver (struct libusb_device_handle *dev_handle, uint8_t interface) {
2345 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
2347 enum libusb_error err;
2349 if (HAS_CAPTURE_DEVICE()) {
2351 return LIBUSB_ERROR_NOT_SUPPORTED;
2354 if (dpriv->capture_count == 0) {
2355 /* request authorization */
2356 if (darwin_has_capture_entitlements ()) {
2357 kresult = IOServiceAuthorize (dpriv->service, kIOServiceInteractionAllowed);
2358 if (kresult != kIOReturnSuccess) {
2359 usbi_err (HANDLE_CTX (dev_handle), "IOServiceAuthorize: %s", darwin_error_str(kresult));
2360 return darwin_to_libusb (kresult);
2362 /* we need start() to be called again for authorization status to refresh */
2363 err = darwin_reload_device (dev_handle);
2364 if (err != LIBUSB_SUCCESS) {
2368 /* reset device to release existing drivers */
2369 err = darwin_reenumerate_device (dev_handle, true);
2370 if (err != LIBUSB_SUCCESS) {
2374 dpriv->capture_count++;
2375 return LIBUSB_SUCCESS;
2379 static int darwin_attach_kernel_driver (struct libusb_device_handle *dev_handle, uint8_t interface) {
2381 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
2383 if (HAS_CAPTURE_DEVICE()) {
2385 return LIBUSB_ERROR_NOT_SUPPORTED;
2388 dpriv->capture_count--;
2389 if (dpriv->capture_count > 0) {
2390 return LIBUSB_SUCCESS;
2392 dpriv->capture_count = 0;
2394 /* reset device to attach kernel drivers */
2395 return darwin_reenumerate_device (dev_handle, false);
2398 static int darwin_capture_claim_interface(struct libusb_device_handle *dev_handle, uint8_t iface) {
2399 enum libusb_error ret;
2400 if (dev_handle->auto_detach_kernel_driver) {
2401 ret = darwin_detach_kernel_driver (dev_handle, iface);
2402 if (ret != LIBUSB_SUCCESS) {
2406 return darwin_claim_interface (dev_handle, iface);
2409 static int darwin_capture_release_interface(struct libusb_device_handle *dev_handle, uint8_t iface) {
2410 enum libusb_error ret;
2412 ret = darwin_release_interface (dev_handle, iface);
2413 if (ret != LIBUSB_SUCCESS) {
2416 if (dev_handle->auto_detach_kernel_driver) {
2417 ret = darwin_attach_kernel_driver (dev_handle, iface);
2424 const struct usbi_os_backend usbi_backend = {
2426 .caps = USBI_CAP_SUPPORTS_DETACH_KERNEL_DRIVER,
2427 .init = darwin_init,
2428 .exit = darwin_exit,
2429 .get_active_config_descriptor = darwin_get_active_config_descriptor,
2430 .get_config_descriptor = darwin_get_config_descriptor,
2431 .hotplug_poll = darwin_hotplug_poll,
2433 .open = darwin_open,
2434 .close = darwin_close,
2435 .get_configuration = darwin_get_configuration,
2436 .set_configuration = darwin_set_configuration,
2438 .set_interface_altsetting = darwin_set_interface_altsetting,
2439 .clear_halt = darwin_clear_halt,
2440 .reset_device = darwin_reset_device,
2442 #if InterfaceVersion >= 550
2443 .alloc_streams = darwin_alloc_streams,
2444 .free_streams = darwin_free_streams,
2447 .kernel_driver_active = darwin_kernel_driver_active,
2449 #if InterfaceVersion >= 700
2450 .detach_kernel_driver = darwin_detach_kernel_driver,
2451 .attach_kernel_driver = darwin_attach_kernel_driver,
2452 .claim_interface = darwin_capture_claim_interface,
2453 .release_interface = darwin_capture_release_interface,
2455 .claim_interface = darwin_claim_interface,
2456 .release_interface = darwin_release_interface,
2459 .destroy_device = darwin_destroy_device,
2461 .submit_transfer = darwin_submit_transfer,
2462 .cancel_transfer = darwin_cancel_transfer,
2464 .handle_transfer_completion = darwin_handle_transfer_completion,
2466 .device_priv_size = sizeof(struct darwin_device_priv),
2467 .device_handle_priv_size = sizeof(struct darwin_device_handle_priv),
2468 .transfer_priv_size = sizeof(struct darwin_transfer_priv),