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_clear_halt(struct libusb_device_handle *dev_handle, unsigned char endpoint);
85 static int darwin_reset_device(struct libusb_device_handle *dev_handle);
86 static void darwin_async_io_callback (void *refcon, IOReturn result, void *arg0);
88 static enum libusb_error darwin_scan_devices(struct libusb_context *ctx);
89 static enum libusb_error process_new_device (struct libusb_context *ctx, struct darwin_cached_device *cached_device,
90 UInt64 old_session_id);
92 static enum libusb_error darwin_get_cached_device(io_service_t service, struct darwin_cached_device **cached_out,
93 UInt64 *old_session_id);
95 #if defined(ENABLE_LOGGING)
96 static const char *darwin_error_str (IOReturn result) {
97 static char string_buffer[50];
99 case kIOReturnSuccess:
101 case kIOReturnNotOpen:
102 return "device not opened for exclusive access";
103 case kIOReturnNoDevice:
104 return "no connection to an IOService";
105 case kIOUSBNoAsyncPortErr:
106 return "no async port has been opened for interface";
107 case kIOReturnExclusiveAccess:
108 return "another process has device opened for exclusive access";
109 case kIOUSBPipeStalled:
110 return "pipe is stalled";
112 return "could not establish a connection to the Darwin kernel";
113 case kIOUSBTransactionTimeout:
114 return "transaction timed out";
115 case kIOReturnBadArgument:
116 return "invalid argument";
117 case kIOReturnAborted:
118 return "transaction aborted";
119 case kIOReturnNotResponding:
120 return "device not responding";
121 case kIOReturnOverrun:
122 return "data overrun";
123 case kIOReturnCannotWire:
124 return "physical memory can not be wired down";
125 case kIOReturnNoResources:
126 return "out of resources";
127 case kIOUSBHighSpeedSplitError:
128 return "high speed split error";
129 case kIOUSBUnknownPipeErr:
130 return "pipe ref not recognized";
132 snprintf(string_buffer, sizeof(string_buffer), "unknown error (0x%x)", result);
133 return string_buffer;
138 static enum libusb_error darwin_to_libusb (IOReturn result) {
140 case kIOReturnUnderrun:
141 case kIOReturnSuccess:
142 return LIBUSB_SUCCESS;
143 case kIOReturnNotOpen:
144 case kIOReturnNoDevice:
145 return LIBUSB_ERROR_NO_DEVICE;
146 case kIOReturnExclusiveAccess:
147 return LIBUSB_ERROR_ACCESS;
148 case kIOUSBPipeStalled:
149 return LIBUSB_ERROR_PIPE;
150 case kIOReturnBadArgument:
151 return LIBUSB_ERROR_INVALID_PARAM;
152 case kIOUSBTransactionTimeout:
153 return LIBUSB_ERROR_TIMEOUT;
154 case kIOReturnNotResponding:
155 case kIOReturnAborted:
157 case kIOUSBNoAsyncPortErr:
158 case kIOUSBUnknownPipeErr:
160 return LIBUSB_ERROR_OTHER;
164 /* this function must be called with the darwin_cached_devices_lock held */
165 static void darwin_deref_cached_device(struct darwin_cached_device *cached_dev) {
166 cached_dev->refcount--;
167 /* free the device and remove it from the cache */
168 if (0 == cached_dev->refcount) {
169 list_del(&cached_dev->list);
171 if (cached_dev->device) {
172 (*(cached_dev->device))->Release(cached_dev->device);
173 cached_dev->device = NULL;
175 IOObjectRelease (cached_dev->service);
180 static void darwin_ref_cached_device(struct darwin_cached_device *cached_dev) {
181 cached_dev->refcount++;
184 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) {
185 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
187 /* current interface */
188 struct darwin_interface *cInterface;
192 usbi_dbg ("converting ep address 0x%02x to pipeRef and interface", ep);
194 for (iface = 0 ; iface < USB_MAXINTERFACES ; iface++) {
195 cInterface = &priv->interfaces[iface];
197 if (dev_handle->claimed_interfaces & (1U << iface)) {
198 for (i = 0 ; i < cInterface->num_endpoints ; i++) {
199 if (cInterface->endpoint_addrs[i] == ep) {
206 *interface_out = cInterface;
208 usbi_dbg ("pipe %d on interface %d matches", *pipep, iface);
209 return LIBUSB_SUCCESS;
215 /* No pipe found with the correct endpoint address */
216 usbi_warn (HANDLE_CTX(dev_handle), "no pipeRef found with endpoint address 0x%02x.", ep);
218 return LIBUSB_ERROR_NOT_FOUND;
221 static IOReturn usb_setup_device_iterator (io_iterator_t *deviceIterator, UInt32 location) {
222 CFMutableDictionaryRef matchingDict = IOServiceMatching(darwin_device_class);
225 return kIOReturnError;
228 CFMutableDictionaryRef propertyMatchDict = CFDictionaryCreateMutable(kCFAllocatorDefault, 0,
229 &kCFTypeDictionaryKeyCallBacks,
230 &kCFTypeDictionaryValueCallBacks);
232 /* there are no unsigned CFNumber types so treat the value as signed. the OS seems to do this
233 internally (CFNumberType of locationID is kCFNumberSInt32Type) */
234 CFTypeRef locationCF = CFNumberCreate (NULL, kCFNumberSInt32Type, &location);
236 if (propertyMatchDict && locationCF) {
237 CFDictionarySetValue (propertyMatchDict, CFSTR(kUSBDevicePropertyLocationID), locationCF);
238 CFDictionarySetValue (matchingDict, CFSTR(kIOPropertyMatchKey), propertyMatchDict);
240 /* else we can still proceed as long as the caller accounts for the possibility of other devices in the iterator */
242 /* release our references as per the Create Rule */
243 if (propertyMatchDict)
244 CFRelease (propertyMatchDict);
246 CFRelease (locationCF);
249 return IOServiceGetMatchingServices(kIOMasterPortDefault, matchingDict, deviceIterator);
252 /* Returns 1 on success, 0 on failure. */
253 static bool get_ioregistry_value_number (io_service_t service, CFStringRef property, CFNumberType type, void *p) {
254 CFTypeRef cfNumber = IORegistryEntryCreateCFProperty (service, property, kCFAllocatorDefault, 0);
258 if (CFGetTypeID(cfNumber) == CFNumberGetTypeID()) {
259 success = CFNumberGetValue(cfNumber, type, p);
262 CFRelease (cfNumber);
265 return (success != 0);
268 /* Returns 1 on success, 0 on failure. */
269 static bool get_ioregistry_value_data (io_service_t service, CFStringRef property, ssize_t size, void *p) {
270 CFTypeRef cfData = IORegistryEntryCreateCFProperty (service, property, kCFAllocatorDefault, 0);
271 bool success = false;
274 if (CFGetTypeID (cfData) == CFDataGetTypeID ()) {
275 CFIndex length = CFDataGetLength (cfData);
280 CFDataGetBytes (cfData, CFRangeMake(0, size), p);
290 static usb_device_t **darwin_device_from_service (io_service_t service)
292 io_cf_plugin_ref_t *plugInInterface = NULL;
293 usb_device_t **device;
296 const int max_retries = 5;
298 /* The IOCreatePlugInInterfaceForService function might consistently return
299 an "out of resources" error with certain USB devices the first time we run
300 it. The reason is still unclear, but retrying fixes the problem */
301 for (int count = 0; count < max_retries; count++) {
302 kresult = IOCreatePlugInInterfaceForService(service, kIOUSBDeviceUserClientTypeID,
303 kIOCFPlugInInterfaceID, &plugInInterface,
305 if (kIOReturnSuccess == kresult && plugInInterface) {
309 usbi_dbg ("set up plugin for service retry: %s", darwin_error_str (kresult));
311 /* sleep for a little while before trying again */
312 nanosleep(&(struct timespec){.tv_sec = 0, .tv_nsec = 1000}, NULL);
315 if (kIOReturnSuccess != kresult || !plugInInterface) {
316 usbi_dbg ("could not set up plugin for service: %s", darwin_error_str (kresult));
320 (void)(*plugInInterface)->QueryInterface(plugInInterface, CFUUIDGetUUIDBytes(DeviceInterfaceID),
322 /* Use release instead of IODestroyPlugInInterface to avoid stopping IOServices associated with this device */
323 (*plugInInterface)->Release (plugInInterface);
328 static void darwin_devices_attached (void *ptr, io_iterator_t add_devices) {
330 struct darwin_cached_device *cached_device;
331 UInt64 old_session_id;
332 struct libusb_context *ctx;
333 io_service_t service;
336 usbi_mutex_lock(&active_contexts_lock);
338 while ((service = IOIteratorNext(add_devices))) {
339 ret = darwin_get_cached_device (service, &cached_device, &old_session_id);
340 if (ret < 0 || !cached_device->can_enumerate) {
344 /* add this device to each active context's device list */
345 for_each_context(ctx) {
346 process_new_device (ctx, cached_device, old_session_id);
349 if (cached_device->in_reenumerate) {
350 usbi_dbg ("cached device in reset state. reset complete...");
351 cached_device->in_reenumerate = false;
354 IOObjectRelease(service);
357 usbi_mutex_unlock(&active_contexts_lock);
360 static void darwin_devices_detached (void *ptr, io_iterator_t rem_devices) {
362 struct libusb_device *dev = NULL;
363 struct libusb_context *ctx;
364 struct darwin_cached_device *old_device;
370 usbi_mutex_lock(&active_contexts_lock);
372 while ((device = IOIteratorNext (rem_devices)) != 0) {
373 bool is_reenumerating = false;
375 /* get the location from the i/o registry */
376 ret = get_ioregistry_value_number (device, CFSTR("sessionID"), kCFNumberSInt64Type, &session);
377 IOObjectRelease (device);
381 /* we need to match darwin_ref_cached_device call made in darwin_get_cached_device function
382 otherwise no cached device will ever get freed */
383 usbi_mutex_lock(&darwin_cached_devices_lock);
384 list_for_each_entry(old_device, &darwin_cached_devices, list, struct darwin_cached_device) {
385 if (old_device->session == session) {
386 if (old_device->in_reenumerate) {
387 /* device is re-enumerating. do not dereference the device at this time. libusb_reset_device()
388 * will deref if needed. */
389 usbi_dbg ("detected device detached due to re-enumeration");
391 /* the device object is no longer usable so go ahead and release it */
392 if (old_device->device) {
393 (*(old_device->device))->Release(old_device->device);
394 old_device->device = NULL;
397 is_reenumerating = true;
399 darwin_deref_cached_device (old_device);
406 usbi_mutex_unlock(&darwin_cached_devices_lock);
407 if (is_reenumerating) {
411 for_each_context(ctx) {
412 usbi_dbg ("notifying context %p of device disconnect", ctx);
414 dev = usbi_get_device_by_session_id(ctx, (unsigned long) session);
416 /* signal the core that this device has been disconnected. the core will tear down this device
417 when the reference count reaches 0 */
418 usbi_disconnect_device(dev);
419 libusb_unref_device(dev);
424 usbi_mutex_unlock(&active_contexts_lock);
427 static void darwin_hotplug_poll (void)
429 /* not sure if 1 ms will be too long/short but it should work ok */
430 mach_timespec_t timeout = {.tv_sec = 0, .tv_nsec = 1000000ul};
432 /* since a kernel thread may notify the IOIterators used for
433 * hotplug notification we can't just clear the iterators.
434 * instead just wait until all IOService providers are quiet */
435 (void) IOKitWaitQuiet (kIOMasterPortDefault, &timeout);
438 static void darwin_clear_iterator (io_iterator_t iter) {
441 while ((device = IOIteratorNext (iter)) != 0)
442 IOObjectRelease (device);
445 static void darwin_fail_startup(void) {
446 pthread_mutex_lock (&libusb_darwin_at_mutex);
447 libusb_darwin_acfl = LIBUSB_DARWIN_STARTUP_FAILURE;
448 pthread_cond_signal (&libusb_darwin_at_cond);
449 pthread_mutex_unlock (&libusb_darwin_at_mutex);
453 static void *darwin_event_thread_main (void *arg0) {
455 struct libusb_context *ctx = (struct libusb_context *)arg0;
456 CFRunLoopRef runloop;
457 CFRunLoopSourceRef libusb_shutdown_cfsource;
458 CFRunLoopSourceContext libusb_shutdown_cfsourcectx;
460 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
461 /* Set this thread's name, so it can be seen in the debugger
462 and crash reports. */
463 pthread_setname_np ("org.libusb.device-hotplug");
466 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 && MAC_OS_X_VERSION_MIN_REQUIRED < 101200
467 /* Tell the Objective-C garbage collector about this thread.
468 This is required because, unlike NSThreads, pthreads are
469 not automatically registered. Although we don't use
470 Objective-C, we use CoreFoundation, which does.
471 Garbage collection support was entirely removed in 10.12,
472 so don't bother there. */
473 objc_registerThreadWithCollector();
476 /* hotplug (device arrival/removal) sources */
477 CFRunLoopSourceRef libusb_notification_cfsource;
478 io_notification_port_t libusb_notification_port;
479 io_iterator_t libusb_rem_device_iterator;
480 io_iterator_t libusb_add_device_iterator;
482 usbi_dbg ("creating hotplug event source");
484 runloop = CFRunLoopGetCurrent ();
487 /* add the shutdown cfsource to the run loop */
488 memset(&libusb_shutdown_cfsourcectx, 0, sizeof(libusb_shutdown_cfsourcectx));
489 libusb_shutdown_cfsourcectx.info = runloop;
490 libusb_shutdown_cfsourcectx.perform = (void (*)(void *))CFRunLoopStop;
491 libusb_shutdown_cfsource = CFRunLoopSourceCreate(NULL, 0, &libusb_shutdown_cfsourcectx);
492 CFRunLoopAddSource(runloop, libusb_shutdown_cfsource, kCFRunLoopDefaultMode);
494 /* add the notification port to the run loop */
495 libusb_notification_port = IONotificationPortCreate (kIOMasterPortDefault);
496 libusb_notification_cfsource = IONotificationPortGetRunLoopSource (libusb_notification_port);
497 CFRunLoopAddSource(runloop, libusb_notification_cfsource, kCFRunLoopDefaultMode);
499 /* create notifications for removed devices */
500 kresult = IOServiceAddMatchingNotification (libusb_notification_port, kIOTerminatedNotification,
501 IOServiceMatching(darwin_device_class),
502 darwin_devices_detached,
503 ctx, &libusb_rem_device_iterator);
505 if (kresult != kIOReturnSuccess) {
506 usbi_err (ctx, "could not add hotplug event source: %s", darwin_error_str (kresult));
507 CFRelease (libusb_shutdown_cfsource);
509 darwin_fail_startup ();
512 /* create notifications for attached devices */
513 kresult = IOServiceAddMatchingNotification(libusb_notification_port, kIOFirstMatchNotification,
514 IOServiceMatching(darwin_device_class),
515 darwin_devices_attached,
516 ctx, &libusb_add_device_iterator);
518 if (kresult != kIOReturnSuccess) {
519 usbi_err (ctx, "could not add hotplug event source: %s", darwin_error_str (kresult));
520 CFRelease (libusb_shutdown_cfsource);
522 darwin_fail_startup ();
526 darwin_clear_iterator (libusb_rem_device_iterator);
527 darwin_clear_iterator (libusb_add_device_iterator);
529 usbi_dbg ("darwin event thread ready to receive events");
531 /* signal the main thread that the hotplug runloop has been created. */
532 pthread_mutex_lock (&libusb_darwin_at_mutex);
533 libusb_darwin_acfl = runloop;
534 libusb_darwin_acfls = libusb_shutdown_cfsource;
535 pthread_cond_signal (&libusb_darwin_at_cond);
536 pthread_mutex_unlock (&libusb_darwin_at_mutex);
538 /* run the runloop */
541 usbi_dbg ("darwin event thread exiting");
543 /* signal the main thread that the hotplug runloop has finished. */
544 pthread_mutex_lock (&libusb_darwin_at_mutex);
545 libusb_darwin_acfls = NULL;
546 libusb_darwin_acfl = NULL;
547 pthread_cond_signal (&libusb_darwin_at_cond);
548 pthread_mutex_unlock (&libusb_darwin_at_mutex);
550 /* remove the notification cfsource */
551 CFRunLoopRemoveSource(runloop, libusb_notification_cfsource, kCFRunLoopDefaultMode);
553 /* remove the shutdown cfsource */
554 CFRunLoopRemoveSource(runloop, libusb_shutdown_cfsource, kCFRunLoopDefaultMode);
556 /* delete notification port */
557 IONotificationPortDestroy (libusb_notification_port);
559 /* delete iterators */
560 IOObjectRelease (libusb_rem_device_iterator);
561 IOObjectRelease (libusb_add_device_iterator);
563 CFRelease (libusb_shutdown_cfsource);
569 /* cleanup function to destroy cached devices */
570 static void darwin_cleanup_devices(void) {
571 struct darwin_cached_device *dev, *next;
573 list_for_each_entry_safe(dev, next, &darwin_cached_devices, list, struct darwin_cached_device) {
574 darwin_deref_cached_device(dev);
578 static int darwin_init(struct libusb_context *ctx) {
582 first_init = (1 == ++init_count);
586 if (NULL == darwin_cached_devices.next) {
587 list_init (&darwin_cached_devices);
589 assert(list_empty(&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 uint8_t old_alt_setting;
1569 /* current interface */
1570 struct darwin_interface *cInterface = &priv->interfaces[iface];
1572 if (!cInterface->interface)
1573 return LIBUSB_ERROR_NO_DEVICE;
1575 kresult = (*(cInterface->interface))->SetAlternateInterface (cInterface->interface, altsetting);
1576 if (kresult != kIOReturnSuccess)
1577 usbi_warn (HANDLE_CTX (dev_handle), "SetAlternateInterface: %s", darwin_error_str(kresult));
1579 if (kresult != kIOUSBPipeStalled)
1580 return darwin_to_libusb (kresult);
1582 /* If a device only supports a default setting for the specified interface, then a STALL
1583 (kIOUSBPipeStalled) may be returned. Ref: USB 2.0 specs 9.4.10.
1584 Mimick the behaviour in e.g. the Linux kernel: in such case, reset all endpoints
1585 of the interface (as would have been done per 9.1.1.5) and return success. */
1587 /* For some reason we need to reclaim the interface after the pipe error */
1588 ret = darwin_claim_interface (dev_handle, iface);
1591 darwin_release_interface (dev_handle, iface);
1592 usbi_err (HANDLE_CTX (dev_handle), "could not reclaim interface");
1595 /* Return error if a change to another value was attempted */
1596 kresult = (*(cInterface->interface))->GetAlternateSetting (cInterface->interface, &old_alt_setting);
1597 if (kresult == kIOReturnSuccess && altsetting != old_alt_setting)
1598 return LIBUSB_ERROR_PIPE;
1600 for (i = 0 ; i < cInterface->num_endpoints ; i++)
1601 darwin_clear_halt(dev_handle, cInterface->endpoint_addrs[i]);
1603 return LIBUSB_SUCCESS;
1606 static int darwin_clear_halt(struct libusb_device_handle *dev_handle, unsigned char endpoint) {
1607 /* current interface */
1608 struct darwin_interface *cInterface;
1612 /* determine the interface/endpoint to use */
1613 if (ep_to_pipeRef (dev_handle, endpoint, &pipeRef, NULL, &cInterface) != 0) {
1614 usbi_err (HANDLE_CTX (dev_handle), "endpoint not found on any open interface");
1616 return LIBUSB_ERROR_NOT_FOUND;
1619 /* newer versions of darwin support clearing additional bits on the device's endpoint */
1620 kresult = (*(cInterface->interface))->ClearPipeStallBothEnds(cInterface->interface, pipeRef);
1621 if (kresult != kIOReturnSuccess)
1622 usbi_warn (HANDLE_CTX (dev_handle), "ClearPipeStall: %s", darwin_error_str (kresult));
1624 return darwin_to_libusb (kresult);
1627 static int darwin_restore_state (struct libusb_device_handle *dev_handle, int8_t active_config,
1628 unsigned long claimed_interfaces) {
1629 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1630 struct darwin_device_handle_priv *priv = usbi_get_device_handle_priv(dev_handle);
1631 int open_count = dpriv->open_count;
1634 /* clear claimed interfaces temporarily */
1635 dev_handle->claimed_interfaces = 0;
1637 /* close and re-open the device */
1638 priv->is_open = false;
1639 dpriv->open_count = 1;
1641 /* clean up open interfaces */
1642 (void) darwin_close (dev_handle);
1644 /* re-open the device */
1645 ret = darwin_open (dev_handle);
1646 dpriv->open_count = open_count;
1647 if (LIBUSB_SUCCESS != ret) {
1648 /* could not restore configuration */
1649 return LIBUSB_ERROR_NOT_FOUND;
1652 if (dpriv->active_config != active_config) {
1653 usbi_dbg ("darwin/restore_state: restoring configuration %d...", active_config);
1655 ret = darwin_set_configuration (dev_handle, active_config);
1656 if (LIBUSB_SUCCESS != ret) {
1657 usbi_dbg ("darwin/restore_state: could not restore configuration");
1658 return LIBUSB_ERROR_NOT_FOUND;
1662 usbi_dbg ("darwin/restore_state: reclaiming interfaces");
1664 if (claimed_interfaces) {
1665 for (uint8_t iface = 0 ; iface < USB_MAXINTERFACES ; ++iface) {
1666 if (!(claimed_interfaces & (1U << iface))) {
1670 usbi_dbg ("darwin/restore_state: re-claiming interface %u", iface);
1672 ret = darwin_claim_interface (dev_handle, iface);
1673 if (LIBUSB_SUCCESS != ret) {
1674 usbi_dbg ("darwin/restore_state: could not claim interface %u", iface);
1675 return LIBUSB_ERROR_NOT_FOUND;
1678 dev_handle->claimed_interfaces |= 1U << iface;
1682 usbi_dbg ("darwin/restore_state: device state restored");
1684 return LIBUSB_SUCCESS;
1687 static int darwin_reenumerate_device (struct libusb_device_handle *dev_handle, bool capture) {
1688 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1689 unsigned long claimed_interfaces = dev_handle->claimed_interfaces;
1690 int8_t active_config = dpriv->active_config;
1692 IOUSBDeviceDescriptor descriptor;
1693 IOUSBConfigurationDescriptorPtr cached_configuration;
1694 IOUSBConfigurationDescriptor *cached_configurations;
1699 if (dpriv->in_reenumerate) {
1700 /* ack, two (or more) threads are trying to reset the device! abort! */
1701 return LIBUSB_ERROR_NOT_FOUND;
1704 dpriv->in_reenumerate = true;
1706 /* store copies of descriptors so they can be compared after the reset */
1707 memcpy (&descriptor, &dpriv->dev_descriptor, sizeof (descriptor));
1708 cached_configurations = alloca (sizeof (*cached_configurations) * descriptor.bNumConfigurations);
1710 for (i = 0 ; i < descriptor.bNumConfigurations ; ++i) {
1711 (*(dpriv->device))->GetConfigurationDescriptorPtr (dpriv->device, i, &cached_configuration);
1712 memcpy (cached_configurations + i, cached_configuration, sizeof (cached_configurations[i]));
1715 /* if we need to release capture */
1716 if (HAS_CAPTURE_DEVICE()) {
1718 options |= kUSBReEnumerateCaptureDeviceMask;
1724 /* from macOS 10.11 ResetDevice no longer does anything so just use USBDeviceReEnumerate */
1725 kresult = (*(dpriv->device))->USBDeviceReEnumerate (dpriv->device, options);
1726 if (kresult != kIOReturnSuccess) {
1727 usbi_err (HANDLE_CTX (dev_handle), "USBDeviceReEnumerate: %s", darwin_error_str (kresult));
1728 dpriv->in_reenumerate = false;
1729 return darwin_to_libusb (kresult);
1732 /* capture mode does not re-enumerate but it does require re-open */
1734 usbi_dbg ("darwin/reenumerate_device: restoring state...");
1735 dpriv->in_reenumerate = false;
1736 return darwin_restore_state (dev_handle, active_config, claimed_interfaces);
1739 usbi_dbg ("darwin/reenumerate_device: waiting for re-enumeration to complete...");
1742 while (dpriv->in_reenumerate) {
1743 struct timespec delay = {.tv_sec = 0, .tv_nsec = 1000};
1744 nanosleep (&delay, NULL);
1745 if (time++ >= DARWIN_REENUMERATE_TIMEOUT_US) {
1746 usbi_err (HANDLE_CTX (dev_handle), "darwin/reenumerate_device: timeout waiting for reenumerate");
1747 dpriv->in_reenumerate = false;
1748 return LIBUSB_ERROR_TIMEOUT;
1752 /* compare descriptors */
1753 usbi_dbg ("darwin/reenumerate_device: checking whether descriptors changed");
1755 if (memcmp (&descriptor, &dpriv->dev_descriptor, sizeof (descriptor))) {
1756 /* device descriptor changed. need to return not found. */
1757 usbi_dbg ("darwin/reenumerate_device: device descriptor changed");
1758 return LIBUSB_ERROR_NOT_FOUND;
1761 for (i = 0 ; i < descriptor.bNumConfigurations ; ++i) {
1762 (void) (*(dpriv->device))->GetConfigurationDescriptorPtr (dpriv->device, i, &cached_configuration);
1763 if (memcmp (cached_configuration, cached_configurations + i, sizeof (cached_configurations[i]))) {
1764 usbi_dbg ("darwin/reenumerate_device: configuration descriptor %d changed", i);
1765 return LIBUSB_ERROR_NOT_FOUND;
1769 usbi_dbg ("darwin/reenumerate_device: device reset complete. restoring state...");
1771 return darwin_restore_state (dev_handle, active_config, claimed_interfaces);
1774 static int darwin_reset_device (struct libusb_device_handle *dev_handle) {
1775 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
1778 if (dpriv->capture_count > 0) {
1779 /* we have to use ResetDevice as USBDeviceReEnumerate() loses the authorization for capture */
1780 kresult = (*(dpriv->device))->ResetDevice (dpriv->device);
1781 return darwin_to_libusb (kresult);
1783 return darwin_reenumerate_device (dev_handle, false);
1787 static int darwin_kernel_driver_active(struct libusb_device_handle *dev_handle, uint8_t interface) {
1788 enum libusb_error ret = darwin_claim_interface (dev_handle, interface);
1789 if (ret == LIBUSB_SUCCESS) {
1790 darwin_release_interface (dev_handle, interface);
1792 return (ret == LIBUSB_ERROR_ACCESS);
1795 static void darwin_destroy_device(struct libusb_device *dev) {
1796 struct darwin_device_priv *dpriv = usbi_get_device_priv(dev);
1799 /* need to hold the lock in case this is the last reference to the device */
1800 usbi_mutex_lock(&darwin_cached_devices_lock);
1801 darwin_deref_cached_device (dpriv->dev);
1803 usbi_mutex_unlock(&darwin_cached_devices_lock);
1807 static int submit_bulk_transfer(struct usbi_transfer *itransfer) {
1808 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1811 uint8_t transferType;
1813 uint16_t maxPacketSize;
1815 struct darwin_interface *cInterface;
1816 #if InterfaceVersion >= 550
1817 IOUSBEndpointProperties pipeProperties = {.bVersion = kUSBEndpointPropertiesVersion3};
1819 /* None of the values below are used in libusb for bulk transfers */
1820 uint8_t direction, number, interval;
1823 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
1824 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
1826 return LIBUSB_ERROR_NOT_FOUND;
1829 #if InterfaceVersion >= 550
1830 ret = (*(cInterface->interface))->GetPipePropertiesV3 (cInterface->interface, pipeRef, &pipeProperties);
1832 transferType = pipeProperties.bTransferType;
1833 maxPacketSize = pipeProperties.wMaxPacketSize;
1835 ret = (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
1836 &transferType, &maxPacketSize, &interval);
1840 usbi_err (TRANSFER_CTX (transfer), "bulk transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
1841 darwin_error_str(ret), ret);
1842 return darwin_to_libusb (ret);
1845 if (0 != (transfer->length % maxPacketSize)) {
1846 /* do not need a zero packet */
1847 transfer->flags &= ~LIBUSB_TRANSFER_ADD_ZERO_PACKET;
1850 /* submit the request */
1851 /* timeouts are unavailable on interrupt endpoints */
1852 if (transferType == kUSBInterrupt) {
1853 if (IS_XFERIN(transfer))
1854 ret = (*(cInterface->interface))->ReadPipeAsync(cInterface->interface, pipeRef, transfer->buffer,
1855 (UInt32)transfer->length, darwin_async_io_callback, itransfer);
1857 ret = (*(cInterface->interface))->WritePipeAsync(cInterface->interface, pipeRef, transfer->buffer,
1858 (UInt32)transfer->length, darwin_async_io_callback, itransfer);
1860 itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
1862 if (IS_XFERIN(transfer))
1863 ret = (*(cInterface->interface))->ReadPipeAsyncTO(cInterface->interface, pipeRef, transfer->buffer,
1864 (UInt32)transfer->length, transfer->timeout, transfer->timeout,
1865 darwin_async_io_callback, itransfer);
1867 ret = (*(cInterface->interface))->WritePipeAsyncTO(cInterface->interface, pipeRef, transfer->buffer,
1868 (UInt32)transfer->length, transfer->timeout, transfer->timeout,
1869 darwin_async_io_callback, itransfer);
1873 usbi_err (TRANSFER_CTX (transfer), "bulk transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
1874 darwin_error_str(ret), ret);
1876 return darwin_to_libusb (ret);
1879 #if InterfaceVersion >= 550
1880 static int submit_stream_transfer(struct usbi_transfer *itransfer) {
1881 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1882 struct darwin_interface *cInterface;
1886 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
1887 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
1889 return LIBUSB_ERROR_NOT_FOUND;
1892 itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
1894 if (IS_XFERIN(transfer))
1895 ret = (*(cInterface->interface))->ReadStreamsPipeAsyncTO(cInterface->interface, pipeRef, itransfer->stream_id,
1896 transfer->buffer, (UInt32)transfer->length, transfer->timeout,
1897 transfer->timeout, darwin_async_io_callback, itransfer);
1899 ret = (*(cInterface->interface))->WriteStreamsPipeAsyncTO(cInterface->interface, pipeRef, itransfer->stream_id,
1900 transfer->buffer, (UInt32)transfer->length, transfer->timeout,
1901 transfer->timeout, darwin_async_io_callback, itransfer);
1904 usbi_err (TRANSFER_CTX (transfer), "bulk stream transfer failed (dir = %s): %s (code = 0x%08x)", IS_XFERIN(transfer) ? "In" : "Out",
1905 darwin_error_str(ret), ret);
1907 return darwin_to_libusb (ret);
1911 static int submit_iso_transfer(struct usbi_transfer *itransfer) {
1912 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
1913 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
1916 uint8_t direction, number, interval, pipeRef, transferType;
1917 uint16_t maxPacketSize;
1919 AbsoluteTime atTime;
1922 struct darwin_interface *cInterface;
1924 /* construct an array of IOUSBIsocFrames, reuse the old one if the sizes are the same */
1925 if (tpriv->num_iso_packets != transfer->num_iso_packets) {
1926 free(tpriv->isoc_framelist);
1927 tpriv->isoc_framelist = NULL;
1930 if (!tpriv->isoc_framelist) {
1931 tpriv->num_iso_packets = transfer->num_iso_packets;
1932 tpriv->isoc_framelist = (IOUSBIsocFrame*) calloc ((size_t)transfer->num_iso_packets, sizeof(IOUSBIsocFrame));
1933 if (!tpriv->isoc_framelist)
1934 return LIBUSB_ERROR_NO_MEM;
1937 /* copy the frame list from the libusb descriptor (the structures differ only is member order) */
1938 for (i = 0 ; i < transfer->num_iso_packets ; i++) {
1939 unsigned int length = transfer->iso_packet_desc[i].length;
1940 assert(length <= UINT16_MAX);
1941 tpriv->isoc_framelist[i].frReqCount = (UInt16)length;
1944 /* determine the interface/endpoint to use */
1945 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
1946 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
1948 return LIBUSB_ERROR_NOT_FOUND;
1951 /* determine the properties of this endpoint and the speed of the device */
1952 (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
1953 &transferType, &maxPacketSize, &interval);
1955 /* Last but not least we need the bus frame number */
1956 kresult = (*(cInterface->interface))->GetBusFrameNumber(cInterface->interface, &frame, &atTime);
1957 if (kresult != kIOReturnSuccess) {
1958 usbi_err (TRANSFER_CTX (transfer), "failed to get bus frame number: %d", kresult);
1959 free(tpriv->isoc_framelist);
1960 tpriv->isoc_framelist = NULL;
1962 return darwin_to_libusb (kresult);
1965 (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
1966 &transferType, &maxPacketSize, &interval);
1968 /* schedule for a frame a little in the future */
1971 if (cInterface->frames[transfer->endpoint] && frame < cInterface->frames[transfer->endpoint])
1972 frame = cInterface->frames[transfer->endpoint];
1974 /* submit the request */
1975 if (IS_XFERIN(transfer))
1976 kresult = (*(cInterface->interface))->ReadIsochPipeAsync(cInterface->interface, pipeRef, transfer->buffer, frame,
1977 (UInt32)transfer->num_iso_packets, tpriv->isoc_framelist, darwin_async_io_callback,
1980 kresult = (*(cInterface->interface))->WriteIsochPipeAsync(cInterface->interface, pipeRef, transfer->buffer, frame,
1981 (UInt32)transfer->num_iso_packets, tpriv->isoc_framelist, darwin_async_io_callback,
1984 if (LIBUSB_SPEED_FULL == transfer->dev_handle->dev->speed)
1986 cInterface->frames[transfer->endpoint] = frame + (UInt32)transfer->num_iso_packets * (1U << (interval - 1));
1988 /* High/super speed */
1989 cInterface->frames[transfer->endpoint] = frame + (UInt32)transfer->num_iso_packets * (1U << (interval - 1)) / 8;
1991 if (kresult != kIOReturnSuccess) {
1992 usbi_err (TRANSFER_CTX (transfer), "isochronous transfer failed (dir: %s): %s", IS_XFERIN(transfer) ? "In" : "Out",
1993 darwin_error_str(kresult));
1994 free (tpriv->isoc_framelist);
1995 tpriv->isoc_framelist = NULL;
1998 return darwin_to_libusb (kresult);
2001 static int submit_control_transfer(struct usbi_transfer *itransfer) {
2002 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2003 struct libusb_control_setup *setup = (struct libusb_control_setup *) transfer->buffer;
2004 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
2005 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
2009 memset(&tpriv->req, 0, sizeof(tpriv->req));
2011 /* IOUSBDeviceInterface expects the request in cpu endianness */
2012 tpriv->req.bmRequestType = setup->bmRequestType;
2013 tpriv->req.bRequest = setup->bRequest;
2014 /* these values should be in bus order from libusb_fill_control_setup */
2015 tpriv->req.wValue = OSSwapLittleToHostInt16 (setup->wValue);
2016 tpriv->req.wIndex = OSSwapLittleToHostInt16 (setup->wIndex);
2017 tpriv->req.wLength = OSSwapLittleToHostInt16 (setup->wLength);
2018 /* data is stored after the libusb control block */
2019 tpriv->req.pData = transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE;
2020 tpriv->req.completionTimeout = transfer->timeout;
2021 tpriv->req.noDataTimeout = transfer->timeout;
2023 itransfer->timeout_flags |= USBI_TRANSFER_OS_HANDLES_TIMEOUT;
2025 /* all transfers in libusb-1.0 are async */
2027 if (transfer->endpoint) {
2028 struct darwin_interface *cInterface;
2031 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface) != 0) {
2032 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
2034 return LIBUSB_ERROR_NOT_FOUND;
2037 kresult = (*(cInterface->interface))->ControlRequestAsyncTO (cInterface->interface, pipeRef, &(tpriv->req), darwin_async_io_callback, itransfer);
2039 /* control request on endpoint 0 */
2040 kresult = (*(dpriv->device))->DeviceRequestAsyncTO(dpriv->device, &(tpriv->req), darwin_async_io_callback, itransfer);
2042 if (kresult != kIOReturnSuccess)
2043 usbi_err (TRANSFER_CTX (transfer), "control request failed: %s", darwin_error_str(kresult));
2045 return darwin_to_libusb (kresult);
2048 static int darwin_submit_transfer(struct usbi_transfer *itransfer) {
2049 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2051 switch (transfer->type) {
2052 case LIBUSB_TRANSFER_TYPE_CONTROL:
2053 return submit_control_transfer(itransfer);
2054 case LIBUSB_TRANSFER_TYPE_BULK:
2055 case LIBUSB_TRANSFER_TYPE_INTERRUPT:
2056 return submit_bulk_transfer(itransfer);
2057 case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
2058 return submit_iso_transfer(itransfer);
2059 case LIBUSB_TRANSFER_TYPE_BULK_STREAM:
2060 #if InterfaceVersion >= 550
2061 return submit_stream_transfer(itransfer);
2063 usbi_err (TRANSFER_CTX(transfer), "IOUSBFamily version does not support bulk stream transfers");
2064 return LIBUSB_ERROR_NOT_SUPPORTED;
2067 usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
2068 return LIBUSB_ERROR_INVALID_PARAM;
2072 static int cancel_control_transfer(struct usbi_transfer *itransfer) {
2073 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2074 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
2077 usbi_warn (ITRANSFER_CTX (itransfer), "aborting all transactions control pipe");
2080 return LIBUSB_ERROR_NO_DEVICE;
2082 kresult = (*(dpriv->device))->USBDeviceAbortPipeZero (dpriv->device);
2084 return darwin_to_libusb (kresult);
2087 static int darwin_abort_transfers (struct usbi_transfer *itransfer) {
2088 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2089 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(transfer->dev_handle->dev);
2090 struct darwin_interface *cInterface;
2091 uint8_t pipeRef, iface;
2094 if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, &iface, &cInterface) != 0) {
2095 usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
2097 return LIBUSB_ERROR_NOT_FOUND;
2101 return LIBUSB_ERROR_NO_DEVICE;
2103 usbi_warn (ITRANSFER_CTX (itransfer), "aborting all transactions on interface %d pipe %d", iface, pipeRef);
2105 /* abort transactions */
2106 #if InterfaceVersion >= 550
2107 if (LIBUSB_TRANSFER_TYPE_BULK_STREAM == transfer->type)
2108 (*(cInterface->interface))->AbortStreamsPipe (cInterface->interface, pipeRef, itransfer->stream_id);
2111 (*(cInterface->interface))->AbortPipe (cInterface->interface, pipeRef);
2113 usbi_dbg ("calling clear pipe stall to clear the data toggle bit");
2115 /* newer versions of darwin support clearing additional bits on the device's endpoint */
2116 kresult = (*(cInterface->interface))->ClearPipeStallBothEnds(cInterface->interface, pipeRef);
2118 return darwin_to_libusb (kresult);
2121 static int darwin_cancel_transfer(struct usbi_transfer *itransfer) {
2122 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2124 switch (transfer->type) {
2125 case LIBUSB_TRANSFER_TYPE_CONTROL:
2126 return cancel_control_transfer(itransfer);
2127 case LIBUSB_TRANSFER_TYPE_BULK:
2128 case LIBUSB_TRANSFER_TYPE_INTERRUPT:
2129 case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
2130 return darwin_abort_transfers (itransfer);
2132 usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
2133 return LIBUSB_ERROR_INVALID_PARAM;
2137 static void darwin_async_io_callback (void *refcon, IOReturn result, void *arg0) {
2138 struct usbi_transfer *itransfer = (struct usbi_transfer *)refcon;
2139 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2140 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
2142 usbi_dbg ("an async io operation has completed");
2144 /* if requested write a zero packet */
2145 if (kIOReturnSuccess == result && IS_XFEROUT(transfer) && transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) {
2146 struct darwin_interface *cInterface;
2149 (void) ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, NULL, &cInterface);
2151 (*(cInterface->interface))->WritePipe (cInterface->interface, pipeRef, transfer->buffer, 0);
2154 tpriv->result = result;
2155 tpriv->size = (UInt32) (uintptr_t) arg0;
2157 /* signal the core that this transfer is complete */
2158 usbi_signal_transfer_completion(itransfer);
2161 static enum libusb_transfer_status darwin_transfer_status (struct usbi_transfer *itransfer, IOReturn result) {
2162 if (itransfer->timeout_flags & USBI_TRANSFER_TIMED_OUT)
2163 result = kIOUSBTransactionTimeout;
2166 case kIOReturnUnderrun:
2167 case kIOReturnSuccess:
2168 return LIBUSB_TRANSFER_COMPLETED;
2169 case kIOReturnAborted:
2170 return LIBUSB_TRANSFER_CANCELLED;
2171 case kIOUSBPipeStalled:
2172 usbi_dbg ("transfer error: pipe is stalled");
2173 return LIBUSB_TRANSFER_STALL;
2174 case kIOReturnOverrun:
2175 usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: data overrun");
2176 return LIBUSB_TRANSFER_OVERFLOW;
2177 case kIOUSBTransactionTimeout:
2178 usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: timed out");
2179 itransfer->timeout_flags |= USBI_TRANSFER_TIMED_OUT;
2180 return LIBUSB_TRANSFER_TIMED_OUT;
2182 usbi_warn (ITRANSFER_CTX (itransfer), "transfer error: %s (value = 0x%08x)", darwin_error_str (result), result);
2183 return LIBUSB_TRANSFER_ERROR;
2187 static int darwin_handle_transfer_completion (struct usbi_transfer *itransfer) {
2188 struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
2189 struct darwin_transfer_priv *tpriv = usbi_get_transfer_priv(itransfer);
2190 const unsigned char max_transfer_type = LIBUSB_TRANSFER_TYPE_BULK_STREAM;
2191 const char *transfer_types[] = {"control", "isoc", "bulk", "interrupt", "bulk-stream", NULL};
2192 bool is_isoc = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS == transfer->type;
2194 if (transfer->type > max_transfer_type) {
2195 usbi_err (TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
2196 return LIBUSB_ERROR_INVALID_PARAM;
2199 if (NULL == tpriv) {
2200 usbi_err (TRANSFER_CTX(transfer), "malformed request is missing transfer priv");
2201 return LIBUSB_ERROR_INVALID_PARAM;
2204 usbi_dbg ("handling transfer completion type %s with kernel status %d", transfer_types[transfer->type], tpriv->result);
2206 if (kIOReturnSuccess == tpriv->result || kIOReturnUnderrun == tpriv->result || kIOUSBTransactionTimeout == tpriv->result) {
2207 if (is_isoc && tpriv->isoc_framelist) {
2208 /* copy isochronous results back */
2210 for (int i = 0; i < transfer->num_iso_packets ; i++) {
2211 struct libusb_iso_packet_descriptor *lib_desc = &transfer->iso_packet_desc[i];
2212 lib_desc->status = darwin_transfer_status (itransfer, tpriv->isoc_framelist[i].frStatus);
2213 lib_desc->actual_length = tpriv->isoc_framelist[i].frActCount;
2215 } else if (!is_isoc) {
2216 itransfer->transferred += tpriv->size;
2220 /* it is ok to handle cancelled transfers without calling usbi_handle_transfer_cancellation (we catch timeout transfers) */
2221 return usbi_handle_transfer_completion (itransfer, darwin_transfer_status (itransfer, tpriv->result));
2224 #if !defined(HAVE_CLOCK_GETTIME)
2225 void usbi_get_monotonic_time(struct timespec *tp) {
2226 mach_timespec_t sys_time;
2228 /* use system boot time as reference for the monotonic clock */
2229 clock_get_time (clock_monotonic, &sys_time);
2231 tp->tv_sec = sys_time.tv_sec;
2232 tp->tv_nsec = sys_time.tv_nsec;
2235 void usbi_get_real_time(struct timespec *tp) {
2236 mach_timespec_t sys_time;
2238 /* CLOCK_REALTIME represents time since the epoch */
2239 clock_get_time (clock_realtime, &sys_time);
2241 tp->tv_sec = sys_time.tv_sec;
2242 tp->tv_nsec = sys_time.tv_nsec;
2246 #if InterfaceVersion >= 550
2247 static int darwin_alloc_streams (struct libusb_device_handle *dev_handle, uint32_t num_streams, unsigned char *endpoints,
2248 int num_endpoints) {
2249 struct darwin_interface *cInterface;
2250 UInt32 supportsStreams;
2254 /* find the minimum number of supported streams on the endpoint list */
2255 for (i = 0 ; i < num_endpoints ; ++i) {
2256 if (0 != (rc = ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface))) {
2260 (*(cInterface->interface))->SupportsStreams (cInterface->interface, pipeRef, &supportsStreams);
2261 if (num_streams > supportsStreams)
2262 num_streams = supportsStreams;
2265 /* it is an error if any endpoint in endpoints does not support streams */
2266 if (0 == num_streams)
2267 return LIBUSB_ERROR_INVALID_PARAM;
2269 /* create the streams */
2270 for (i = 0 ; i < num_endpoints ; ++i) {
2271 (void) ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface);
2273 rc = (*(cInterface->interface))->CreateStreams (cInterface->interface, pipeRef, num_streams);
2274 if (kIOReturnSuccess != rc)
2275 return darwin_to_libusb(rc);
2278 assert(num_streams <= INT_MAX);
2279 return (int)num_streams;
2282 static int darwin_free_streams (struct libusb_device_handle *dev_handle, unsigned char *endpoints, int num_endpoints) {
2283 struct darwin_interface *cInterface;
2284 UInt32 supportsStreams;
2288 for (int i = 0 ; i < num_endpoints ; ++i) {
2289 if (0 != (rc = ep_to_pipeRef (dev_handle, endpoints[i], &pipeRef, NULL, &cInterface)))
2292 (*(cInterface->interface))->SupportsStreams (cInterface->interface, pipeRef, &supportsStreams);
2293 if (0 == supportsStreams)
2294 return LIBUSB_ERROR_INVALID_PARAM;
2296 rc = (*(cInterface->interface))->CreateStreams (cInterface->interface, pipeRef, 0);
2297 if (kIOReturnSuccess != rc)
2298 return darwin_to_libusb(rc);
2301 return LIBUSB_SUCCESS;
2305 #if InterfaceVersion >= 700
2307 /* macOS APIs for getting entitlement values */
2310 #include <Security/Security.h>
2312 typedef struct __SecTask *SecTaskRef;
2313 extern SecTaskRef SecTaskCreateFromSelf(CFAllocatorRef allocator);
2314 extern CFTypeRef SecTaskCopyValueForEntitlement(SecTaskRef task, CFStringRef entitlement, CFErrorRef *error);
2317 static bool darwin_has_capture_entitlements (void) {
2322 task = SecTaskCreateFromSelf (kCFAllocatorDefault);
2326 value = SecTaskCopyValueForEntitlement(task, CFSTR("com.apple.vm.device-access"), NULL);
2328 entitled = value && (CFGetTypeID (value) == CFBooleanGetTypeID ()) && CFBooleanGetValue (value);
2335 static int darwin_reload_device (struct libusb_device_handle *dev_handle) {
2336 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
2337 enum libusb_error err;
2339 usbi_mutex_lock(&darwin_cached_devices_lock);
2340 (*(dpriv->device))->Release(dpriv->device);
2341 dpriv->device = darwin_device_from_service (dpriv->service);
2342 if (!dpriv->device) {
2343 err = LIBUSB_ERROR_NO_DEVICE;
2345 err = LIBUSB_SUCCESS;
2347 usbi_mutex_unlock(&darwin_cached_devices_lock);
2352 /* On macOS, we capture an entire device at once, not individual interfaces. */
2354 static int darwin_detach_kernel_driver (struct libusb_device_handle *dev_handle, uint8_t interface) {
2356 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
2358 enum libusb_error err;
2360 if (HAS_CAPTURE_DEVICE()) {
2362 return LIBUSB_ERROR_NOT_SUPPORTED;
2365 if (dpriv->capture_count == 0) {
2366 /* request authorization */
2367 if (darwin_has_capture_entitlements ()) {
2368 kresult = IOServiceAuthorize (dpriv->service, kIOServiceInteractionAllowed);
2369 if (kresult != kIOReturnSuccess) {
2370 usbi_err (HANDLE_CTX (dev_handle), "IOServiceAuthorize: %s", darwin_error_str(kresult));
2371 return darwin_to_libusb (kresult);
2373 /* we need start() to be called again for authorization status to refresh */
2374 err = darwin_reload_device (dev_handle);
2375 if (err != LIBUSB_SUCCESS) {
2379 /* reset device to release existing drivers */
2380 err = darwin_reenumerate_device (dev_handle, true);
2381 if (err != LIBUSB_SUCCESS) {
2385 dpriv->capture_count++;
2386 return LIBUSB_SUCCESS;
2390 static int darwin_attach_kernel_driver (struct libusb_device_handle *dev_handle, uint8_t interface) {
2392 struct darwin_cached_device *dpriv = DARWIN_CACHED_DEVICE(dev_handle->dev);
2394 if (HAS_CAPTURE_DEVICE()) {
2396 return LIBUSB_ERROR_NOT_SUPPORTED;
2399 dpriv->capture_count--;
2400 if (dpriv->capture_count > 0) {
2401 return LIBUSB_SUCCESS;
2403 dpriv->capture_count = 0;
2405 /* reset device to attach kernel drivers */
2406 return darwin_reenumerate_device (dev_handle, false);
2409 static int darwin_capture_claim_interface(struct libusb_device_handle *dev_handle, uint8_t iface) {
2410 enum libusb_error ret;
2411 if (dev_handle->auto_detach_kernel_driver) {
2412 ret = darwin_detach_kernel_driver (dev_handle, iface);
2413 if (ret != LIBUSB_SUCCESS) {
2417 return darwin_claim_interface (dev_handle, iface);
2420 static int darwin_capture_release_interface(struct libusb_device_handle *dev_handle, uint8_t iface) {
2421 enum libusb_error ret;
2423 ret = darwin_release_interface (dev_handle, iface);
2424 if (ret != LIBUSB_SUCCESS) {
2427 if (dev_handle->auto_detach_kernel_driver) {
2428 ret = darwin_attach_kernel_driver (dev_handle, iface);
2435 const struct usbi_os_backend usbi_backend = {
2437 .caps = USBI_CAP_SUPPORTS_DETACH_KERNEL_DRIVER,
2438 .init = darwin_init,
2439 .exit = darwin_exit,
2440 .get_active_config_descriptor = darwin_get_active_config_descriptor,
2441 .get_config_descriptor = darwin_get_config_descriptor,
2442 .hotplug_poll = darwin_hotplug_poll,
2444 .open = darwin_open,
2445 .close = darwin_close,
2446 .get_configuration = darwin_get_configuration,
2447 .set_configuration = darwin_set_configuration,
2449 .set_interface_altsetting = darwin_set_interface_altsetting,
2450 .clear_halt = darwin_clear_halt,
2451 .reset_device = darwin_reset_device,
2453 #if InterfaceVersion >= 550
2454 .alloc_streams = darwin_alloc_streams,
2455 .free_streams = darwin_free_streams,
2458 .kernel_driver_active = darwin_kernel_driver_active,
2460 #if InterfaceVersion >= 700
2461 .detach_kernel_driver = darwin_detach_kernel_driver,
2462 .attach_kernel_driver = darwin_attach_kernel_driver,
2463 .claim_interface = darwin_capture_claim_interface,
2464 .release_interface = darwin_capture_release_interface,
2466 .claim_interface = darwin_claim_interface,
2467 .release_interface = darwin_release_interface,
2470 .destroy_device = darwin_destroy_device,
2472 .submit_transfer = darwin_submit_transfer,
2473 .cancel_transfer = darwin_cancel_transfer,
2475 .handle_transfer_completion = darwin_handle_transfer_completion,
2477 .device_priv_size = sizeof(struct darwin_device_priv),
2478 .device_handle_priv_size = sizeof(struct darwin_device_handle_priv),
2479 .transfer_priv_size = sizeof(struct darwin_transfer_priv),