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dolphin/Externals/libusb/libusb/os/windows_winusb.c
Léo Lam 054b1172e3 Externals/libusb: Set policy ISO_ALWAYS_START_ASAP for libusbK 
In some cases, this is required to avoid eventually getting a
USBD_STATUS_BAD_START_FRAME error back from the Windows USB stack.

This makes the libusbK code match the behaviour of the Linux backend.

It appears that the libusbK backend tried to get this behaviour by
setting StartFrame to 0. However, libusbK docs state that:

"Specifing 0 for KISO_CONTEXT::StartFrame (start transfer ASAP) is
restricted to the first transaction on a newly opened or reset pipe."
2019-05-27 20:09:55 +02:00

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/*
* windows backend for libusb 1.0
* Copyright © 2009-2012 Pete Batard <pete@akeo.ie>
* Copyright © 2016-2018 Chris Dickens <christopher.a.dickens@gmail.com>
* With contributions from Michael Plante, Orin Eman et al.
* Parts of this code adapted from libusb-win32-v1 by Stephan Meyer
* HID Reports IOCTLs inspired from HIDAPI by Alan Ott, Signal 11 Software
* Hash table functions adapted from glibc, by Ulrich Drepper et al.
* Major code testing contribution by Xiaofan Chen
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <windows.h>
#include <setupapi.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <process.h>
#include <stdio.h>
#include <inttypes.h>
#include <objbase.h>
#include <winioctl.h>
#include "libusbi.h"
#include "windows_common.h"
#include "windows_nt_common.h"
#include "windows_winusb.h"
#define HANDLE_VALID(h) (((h) != NULL) && ((h) != INVALID_HANDLE_VALUE))
// The 2 macros below are used in conjunction with safe loops.
#define LOOP_CHECK(fcall) \
{ \
r = fcall; \
if (r != LIBUSB_SUCCESS) \
continue; \
}
#define LOOP_BREAK(err) \
{ \
r = err; \
continue; \
}
// WinUSB-like API prototypes
static int winusbx_init(struct libusb_context *ctx);
static void winusbx_exit(void);
static int winusbx_open(int sub_api, struct libusb_device_handle *dev_handle);
static void winusbx_close(int sub_api, struct libusb_device_handle *dev_handle);
static int winusbx_configure_endpoints(int sub_api, struct libusb_device_handle *dev_handle, int iface);
static int winusbx_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface);
static int winusbx_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface);
static int winusbx_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer);
static int winusbx_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting);
static int winusbx_submit_iso_transfer(int sub_api, struct usbi_transfer *itransfer);
static int winusbx_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer);
static int winusbx_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint);
static int winusbx_abort_transfers(int sub_api, struct usbi_transfer *itransfer);
static int winusbx_abort_control(int sub_api, struct usbi_transfer *itransfer);
static int winusbx_reset_device(int sub_api, struct libusb_device_handle *dev_handle);
static int winusbx_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size);
// HID API prototypes
static int hid_init(struct libusb_context *ctx);
static void hid_exit(void);
static int hid_open(int sub_api, struct libusb_device_handle *dev_handle);
static void hid_close(int sub_api, struct libusb_device_handle *dev_handle);
static int hid_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface);
static int hid_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface);
static int hid_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting);
static int hid_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer);
static int hid_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer);
static int hid_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint);
static int hid_abort_transfers(int sub_api, struct usbi_transfer *itransfer);
static int hid_reset_device(int sub_api, struct libusb_device_handle *dev_handle);
static int hid_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size);
// Composite API prototypes
static int composite_open(int sub_api, struct libusb_device_handle *dev_handle);
static void composite_close(int sub_api, struct libusb_device_handle *dev_handle);
static int composite_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface);
static int composite_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting);
static int composite_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface);
static int composite_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer);
static int composite_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer);
static int composite_submit_iso_transfer(int sub_api, struct usbi_transfer *itransfer);
static int composite_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint);
static int composite_abort_transfers(int sub_api, struct usbi_transfer *itransfer);
static int composite_abort_control(int sub_api, struct usbi_transfer *itransfer);
static int composite_reset_device(int sub_api, struct libusb_device_handle *dev_handle);
static int composite_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size);
static usbi_mutex_t autoclaim_lock;
// API globals
static HMODULE WinUSBX_handle = NULL;
static struct winusb_interface WinUSBX[SUB_API_MAX];
#define CHECK_WINUSBX_AVAILABLE(sub_api) \
do { \
if (sub_api == SUB_API_NOTSET) \
sub_api = priv->sub_api; \
if (!WinUSBX[sub_api].initialized) \
return LIBUSB_ERROR_ACCESS; \
} while (0)
static bool api_hid_available = false;
#define CHECK_HID_AVAILABLE \
do { \
if (!api_hid_available) \
return LIBUSB_ERROR_ACCESS; \
} while (0)
#if defined(ENABLE_LOGGING)
static const char *guid_to_string(const GUID *guid)
{
static char guid_string[MAX_GUID_STRING_LENGTH];
if (guid == NULL)
return "";
sprintf(guid_string, "{%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X}",
(unsigned int)guid->Data1, guid->Data2, guid->Data3,
guid->Data4[0], guid->Data4[1], guid->Data4[2], guid->Data4[3],
guid->Data4[4], guid->Data4[5], guid->Data4[6], guid->Data4[7]);
return guid_string;
}
#endif
/*
* Sanitize Microsoft's paths: convert to uppercase, add prefix and fix backslashes.
* Return an allocated sanitized string or NULL on error.
*/
static char *sanitize_path(const char *path)
{
const char root_prefix[] = {'\\', '\\', '.', '\\'};
size_t j, size;
char *ret_path;
size_t add_root = 0;
if (path == NULL)
return NULL;
size = strlen(path) + 1;
// Microsoft indiscriminately uses '\\?\', '\\.\', '##?#" or "##.#" for root prefixes.
if (!((size > 3) && (((path[0] == '\\') && (path[1] == '\\') && (path[3] == '\\'))
|| ((path[0] == '#') && (path[1] == '#') && (path[3] == '#'))))) {
add_root = sizeof(root_prefix);
size += add_root;
}
ret_path = malloc(size);
if (ret_path == NULL)
return NULL;
strcpy(&ret_path[add_root], path);
// Ensure consistency with root prefix
memcpy(ret_path, root_prefix, sizeof(root_prefix));
// Same goes for '\' and '#' after the root prefix. Ensure '#' is used
for (j = sizeof(root_prefix); j < size; j++) {
ret_path[j] = (char)toupper((int)ret_path[j]); // Fix case too
if (ret_path[j] == '\\')
ret_path[j] = '#';
}
return ret_path;
}
/*
* Cfgmgr32, AdvAPI32, OLE32 and SetupAPI DLL functions
*/
static BOOL init_dlls(void)
{
DLL_GET_HANDLE(Cfgmgr32);
DLL_LOAD_FUNC(Cfgmgr32, CM_Get_Parent, TRUE);
DLL_LOAD_FUNC(Cfgmgr32, CM_Get_Child, TRUE);
// Prefixed to avoid conflict with header files
DLL_GET_HANDLE(AdvAPI32);
DLL_LOAD_FUNC_PREFIXED(AdvAPI32, p, RegQueryValueExW, TRUE);
DLL_LOAD_FUNC_PREFIXED(AdvAPI32, p, RegCloseKey, TRUE);
DLL_GET_HANDLE(OLE32);
DLL_LOAD_FUNC_PREFIXED(OLE32, p, IIDFromString, TRUE);
DLL_GET_HANDLE(SetupAPI);
DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiGetClassDevsA, TRUE);
DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiEnumDeviceInfo, TRUE);
DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiEnumDeviceInterfaces, TRUE);
DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiGetDeviceInstanceIdA, TRUE);
DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiGetDeviceInterfaceDetailA, TRUE);
DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiGetDeviceRegistryPropertyA, TRUE);
DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiDestroyDeviceInfoList, TRUE);
DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiOpenDevRegKey, TRUE);
DLL_LOAD_FUNC_PREFIXED(SetupAPI, p, SetupDiOpenDeviceInterfaceRegKey, TRUE);
return TRUE;
}
static void exit_dlls(void)
{
DLL_FREE_HANDLE(Cfgmgr32);
DLL_FREE_HANDLE(AdvAPI32);
DLL_FREE_HANDLE(OLE32);
DLL_FREE_HANDLE(SetupAPI);
}
/*
* enumerate interfaces for the whole USB class
*
* Parameters:
* dev_info: a pointer to a dev_info list
* dev_info_data: a pointer to an SP_DEVINFO_DATA to be filled (or NULL if not needed)
* enumerator: the generic USB class for which to retrieve interface details
* index: zero based index of the interface in the device info list
*
* Note: it is the responsibility of the caller to free the DEVICE_INTERFACE_DETAIL_DATA
* structure returned and call this function repeatedly using the same guid (with an
* incremented index starting at zero) until all interfaces have been returned.
*/
static bool get_devinfo_data(struct libusb_context *ctx,
HDEVINFO *dev_info, SP_DEVINFO_DATA *dev_info_data, const char *enumerator, unsigned _index)
{
if (_index == 0) {
*dev_info = pSetupDiGetClassDevsA(NULL, enumerator, NULL, DIGCF_PRESENT|DIGCF_ALLCLASSES);
if (*dev_info == INVALID_HANDLE_VALUE) {
usbi_err(ctx, "could not obtain device info set for PnP enumerator '%s': %s",
enumerator, windows_error_str(0));
return false;
}
}
dev_info_data->cbSize = sizeof(SP_DEVINFO_DATA);
if (!pSetupDiEnumDeviceInfo(*dev_info, _index, dev_info_data)) {
if (GetLastError() != ERROR_NO_MORE_ITEMS)
usbi_err(ctx, "could not obtain device info data for PnP enumerator '%s' index %u: %s",
enumerator, _index, windows_error_str(0));
pSetupDiDestroyDeviceInfoList(*dev_info);
*dev_info = INVALID_HANDLE_VALUE;
return false;
}
return true;
}
/*
* enumerate interfaces for a specific GUID
*
* Parameters:
* dev_info: a pointer to a dev_info list
* dev_info_data: a pointer to an SP_DEVINFO_DATA to be filled (or NULL if not needed)
* guid: the GUID for which to retrieve interface details
* index: zero based index of the interface in the device info list
*
* Note: it is the responsibility of the caller to free the DEVICE_INTERFACE_DETAIL_DATA
* structure returned and call this function repeatedly using the same guid (with an
* incremented index starting at zero) until all interfaces have been returned.
*/
static int get_interface_details(struct libusb_context *ctx, HDEVINFO dev_info,
PSP_DEVINFO_DATA dev_info_data, LPCGUID guid, DWORD *_index, char **dev_interface_path)
{
SP_DEVICE_INTERFACE_DATA dev_interface_data;
PSP_DEVICE_INTERFACE_DETAIL_DATA_A dev_interface_details;
DWORD size;
dev_info_data->cbSize = sizeof(SP_DEVINFO_DATA);
dev_interface_data.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
for (;;) {
if (!pSetupDiEnumDeviceInfo(dev_info, *_index, dev_info_data)) {
if (GetLastError() != ERROR_NO_MORE_ITEMS) {
usbi_err(ctx, "Could not obtain device info data for %s index %u: %s",
guid_to_string(guid), *_index, windows_error_str(0));
return LIBUSB_ERROR_OTHER;
}
// No more devices
return LIBUSB_SUCCESS;
}
// Always advance the index for the next iteration
(*_index)++;
if (pSetupDiEnumDeviceInterfaces(dev_info, dev_info_data, guid, 0, &dev_interface_data))
break;
if (GetLastError() != ERROR_NO_MORE_ITEMS) {
usbi_err(ctx, "Could not obtain interface data for %s devInst %X: %s",
guid_to_string(guid), dev_info_data->DevInst, windows_error_str(0));
return LIBUSB_ERROR_OTHER;
}
// Device does not have an interface matching this GUID, skip
}
// Read interface data (dummy + actual) to access the device path
if (!pSetupDiGetDeviceInterfaceDetailA(dev_info, &dev_interface_data, NULL, 0, &size, NULL)) {
// The dummy call should fail with ERROR_INSUFFICIENT_BUFFER
if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
usbi_err(ctx, "could not access interface data (dummy) for %s devInst %X: %s",
guid_to_string(guid), dev_info_data->DevInst, windows_error_str(0));
return LIBUSB_ERROR_OTHER;
}
} else {
usbi_err(ctx, "program assertion failed - http://msdn.microsoft.com/en-us/library/ms792901.aspx is wrong");
return LIBUSB_ERROR_OTHER;
}
dev_interface_details = malloc(size);
if (dev_interface_details == NULL) {
usbi_err(ctx, "could not allocate interface data for %s devInst %X",
guid_to_string(guid), dev_info_data->DevInst);
return LIBUSB_ERROR_NO_MEM;
}
dev_interface_details->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA_A);
if (!pSetupDiGetDeviceInterfaceDetailA(dev_info, &dev_interface_data,
dev_interface_details, size, NULL, NULL)) {
usbi_err(ctx, "could not access interface data (actual) for %s devInst %X: %s",
guid_to_string(guid), dev_info_data->DevInst, windows_error_str(0));
free(dev_interface_details);
return LIBUSB_ERROR_OTHER;
}
*dev_interface_path = sanitize_path(dev_interface_details->DevicePath);
free(dev_interface_details);
if (*dev_interface_path == NULL) {
usbi_err(ctx, "could not allocate interface path for %s devInst %X",
guid_to_string(guid), dev_info_data->DevInst);
return LIBUSB_ERROR_NO_MEM;
}
return LIBUSB_SUCCESS;
}
/* For libusb0 filter */
static SP_DEVICE_INTERFACE_DETAIL_DATA_A *get_interface_details_filter(struct libusb_context *ctx,
HDEVINFO *dev_info, SP_DEVINFO_DATA *dev_info_data, const GUID *guid, unsigned _index, char *filter_path)
{
SP_DEVICE_INTERFACE_DATA dev_interface_data;
SP_DEVICE_INTERFACE_DETAIL_DATA_A *dev_interface_details;
DWORD size;
if (_index == 0)
*dev_info = pSetupDiGetClassDevsA(guid, NULL, NULL, DIGCF_PRESENT|DIGCF_DEVICEINTERFACE);
if (dev_info_data != NULL) {
dev_info_data->cbSize = sizeof(SP_DEVINFO_DATA);
if (!pSetupDiEnumDeviceInfo(*dev_info, _index, dev_info_data)) {
if (GetLastError() != ERROR_NO_MORE_ITEMS)
usbi_err(ctx, "Could not obtain device info data for index %u: %s",
_index, windows_error_str(0));
pSetupDiDestroyDeviceInfoList(*dev_info);
*dev_info = INVALID_HANDLE_VALUE;
return NULL;
}
}
dev_interface_data.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
if (!pSetupDiEnumDeviceInterfaces(*dev_info, NULL, guid, _index, &dev_interface_data)) {
if (GetLastError() != ERROR_NO_MORE_ITEMS)
usbi_err(ctx, "Could not obtain interface data for index %u: %s",
_index, windows_error_str(0));
pSetupDiDestroyDeviceInfoList(*dev_info);
*dev_info = INVALID_HANDLE_VALUE;
return NULL;
}
// Read interface data (dummy + actual) to access the device path
if (!pSetupDiGetDeviceInterfaceDetailA(*dev_info, &dev_interface_data, NULL, 0, &size, NULL)) {
// The dummy call should fail with ERROR_INSUFFICIENT_BUFFER
if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
usbi_err(ctx, "could not access interface data (dummy) for index %u: %s",
_index, windows_error_str(0));
goto err_exit;
}
} else {
usbi_err(ctx, "program assertion failed - http://msdn.microsoft.com/en-us/library/ms792901.aspx is wrong.");
goto err_exit;
}
dev_interface_details = calloc(1, size);
if (dev_interface_details == NULL) {
usbi_err(ctx, "could not allocate interface data for index %u.", _index);
goto err_exit;
}
dev_interface_details->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA_A);
if (!pSetupDiGetDeviceInterfaceDetailA(*dev_info, &dev_interface_data, dev_interface_details, size, &size, NULL))
usbi_err(ctx, "could not access interface data (actual) for index %u: %s",
_index, windows_error_str(0));
// [trobinso] lookup the libusb0 symbolic index.
if (dev_interface_details) {
HKEY hkey_device_interface = pSetupDiOpenDeviceInterfaceRegKey(*dev_info, &dev_interface_data, 0, KEY_READ);
if (hkey_device_interface != INVALID_HANDLE_VALUE) {
DWORD libusb0_symboliclink_index = 0;
DWORD value_length = sizeof(DWORD);
DWORD value_type = 0;
LONG status;
status = pRegQueryValueExW(hkey_device_interface, L"LUsb0", NULL, &value_type,
(LPBYTE)&libusb0_symboliclink_index, &value_length);
if (status == ERROR_SUCCESS) {
if (libusb0_symboliclink_index < 256) {
// libusb0.sys is connected to this device instance.
// If the the device interface guid is {F9F3FF14-AE21-48A0-8A25-8011A7A931D9} then it's a filter.
sprintf(filter_path, "\\\\.\\libusb0-%04u", (unsigned int)libusb0_symboliclink_index);
usbi_dbg("assigned libusb0 symbolic link %s", filter_path);
} else {
// libusb0.sys was connected to this device instance at one time; but not anymore.
}
}
pRegCloseKey(hkey_device_interface);
}
}
return dev_interface_details;
err_exit:
pSetupDiDestroyDeviceInfoList(*dev_info);
*dev_info = INVALID_HANDLE_VALUE;
return NULL;
}
/*
* Returns the first known ancestor of a device
*/
static struct libusb_device *get_ancestor(struct libusb_context *ctx,
DEVINST devinst, PDEVINST _parent_devinst)
{
struct libusb_device *dev = NULL;
DEVINST parent_devinst;
while (dev == NULL) {
if (CM_Get_Parent(&parent_devinst, devinst, 0) != CR_SUCCESS)
break;
devinst = parent_devinst;
dev = usbi_get_device_by_session_id(ctx, (unsigned long)devinst);
}
if ((dev != NULL) && (_parent_devinst != NULL))
*_parent_devinst = devinst;
return dev;
}
/*
* Determine which interface the given endpoint address belongs to
*/
static int get_interface_by_endpoint(struct libusb_config_descriptor *conf_desc, uint8_t ep)
{
const struct libusb_interface *intf;
const struct libusb_interface_descriptor *intf_desc;
int i, j, k;
for (i = 0; i < conf_desc->bNumInterfaces; i++) {
intf = &conf_desc->interface[i];
for (j = 0; j < intf->num_altsetting; j++) {
intf_desc = &intf->altsetting[j];
for (k = 0; k < intf_desc->bNumEndpoints; k++) {
if (intf_desc->endpoint[k].bEndpointAddress == ep) {
usbi_dbg("found endpoint %02X on interface %d", intf_desc->bInterfaceNumber, i);
return intf_desc->bInterfaceNumber;
}
}
}
}
usbi_dbg("endpoint %02X not found on any interface", ep);
return LIBUSB_ERROR_NOT_FOUND;
}
/*
* Populate the endpoints addresses of the device_priv interface helper structs
*/
static int windows_assign_endpoints(struct libusb_device_handle *dev_handle, int iface, int altsetting)
{
int i, r;
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
struct libusb_config_descriptor *conf_desc;
const struct libusb_interface_descriptor *if_desc;
struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev);
r = libusb_get_active_config_descriptor(dev_handle->dev, &conf_desc);
if (r != LIBUSB_SUCCESS) {
usbi_warn(ctx, "could not read config descriptor: error %d", r);
return r;
}
if_desc = &conf_desc->interface[iface].altsetting[altsetting];
safe_free(priv->usb_interface[iface].endpoint);
if (if_desc->bNumEndpoints == 0) {
usbi_dbg("no endpoints found for interface %d", iface);
libusb_free_config_descriptor(conf_desc);
priv->usb_interface[iface].current_altsetting = altsetting;
return LIBUSB_SUCCESS;
}
priv->usb_interface[iface].endpoint = malloc(if_desc->bNumEndpoints);
if (priv->usb_interface[iface].endpoint == NULL) {
libusb_free_config_descriptor(conf_desc);
return LIBUSB_ERROR_NO_MEM;
}
priv->usb_interface[iface].nb_endpoints = if_desc->bNumEndpoints;
for (i = 0; i < if_desc->bNumEndpoints; i++) {
priv->usb_interface[iface].endpoint[i] = if_desc->endpoint[i].bEndpointAddress;
usbi_dbg("(re)assigned endpoint %02X to interface %d", priv->usb_interface[iface].endpoint[i], iface);
}
libusb_free_config_descriptor(conf_desc);
// Extra init may be required to configure endpoints
if (priv->apib->configure_endpoints)
r = priv->apib->configure_endpoints(SUB_API_NOTSET, dev_handle, iface);
if (r == LIBUSB_SUCCESS)
priv->usb_interface[iface].current_altsetting = altsetting;
return r;
}
// Lookup for a match in the list of API driver names
// return -1 if not found, driver match number otherwise
static int get_sub_api(char *driver, int api)
{
int i;
const char sep_str[2] = {LIST_SEPARATOR, 0};
char *tok, *tmp_str;
size_t len = strlen(driver);
if (len == 0)
return SUB_API_NOTSET;
tmp_str = _strdup(driver);
if (tmp_str == NULL)
return SUB_API_NOTSET;
tok = strtok(tmp_str, sep_str);
while (tok != NULL) {
for (i = 0; i < usb_api_backend[api].nb_driver_names; i++) {
if (_stricmp(tok, usb_api_backend[api].driver_name_list[i]) == 0) {
free(tmp_str);
return i;
}
}
tok = strtok(NULL, sep_str);
}
free(tmp_str);
return SUB_API_NOTSET;
}
/*
* auto-claiming and auto-release helper functions
*/
static int auto_claim(struct libusb_transfer *transfer, int *interface_number, int api_type)
{
struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(
transfer->dev_handle);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
int current_interface = *interface_number;
int r = LIBUSB_SUCCESS;
switch (api_type) {
case USB_API_WINUSBX:
case USB_API_HID:
break;
default:
return LIBUSB_ERROR_INVALID_PARAM;
}
usbi_mutex_lock(&autoclaim_lock);
if (current_interface < 0) { // No serviceable interface was found
for (current_interface = 0; current_interface < USB_MAXINTERFACES; current_interface++) {
// Must claim an interface of the same API type
if ((priv->usb_interface[current_interface].apib->id == api_type)
&& (libusb_claim_interface(transfer->dev_handle, current_interface) == LIBUSB_SUCCESS)) {
usbi_dbg("auto-claimed interface %d for control request", current_interface);
if (handle_priv->autoclaim_count[current_interface] != 0)
usbi_warn(ctx, "program assertion failed - autoclaim_count was nonzero");
handle_priv->autoclaim_count[current_interface]++;
break;
}
}
if (current_interface == USB_MAXINTERFACES) {
usbi_err(ctx, "could not auto-claim any interface");
r = LIBUSB_ERROR_NOT_FOUND;
}
} else {
// If we have a valid interface that was autoclaimed, we must increment
// its autoclaim count so that we can prevent an early release.
if (handle_priv->autoclaim_count[current_interface] != 0)
handle_priv->autoclaim_count[current_interface]++;
}
usbi_mutex_unlock(&autoclaim_lock);
*interface_number = current_interface;
return r;
}
static void auto_release(struct usbi_transfer *itransfer)
{
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
libusb_device_handle *dev_handle = transfer->dev_handle;
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
int r;
usbi_mutex_lock(&autoclaim_lock);
if (handle_priv->autoclaim_count[transfer_priv->interface_number] > 0) {
handle_priv->autoclaim_count[transfer_priv->interface_number]--;
if (handle_priv->autoclaim_count[transfer_priv->interface_number] == 0) {
r = libusb_release_interface(dev_handle, transfer_priv->interface_number);
if (r == LIBUSB_SUCCESS)
usbi_dbg("auto-released interface %d", transfer_priv->interface_number);
else
usbi_dbg("failed to auto-release interface %d (%s)",
transfer_priv->interface_number, libusb_error_name((enum libusb_error)r));
}
}
usbi_mutex_unlock(&autoclaim_lock);
}
/*
* init: libusb backend init function
*/
static int winusb_init(struct libusb_context *ctx)
{
int i;
// We need a lock for proper auto-release
usbi_mutex_init(&autoclaim_lock);
// Load DLL imports
if (!init_dlls()) {
usbi_err(ctx, "could not resolve DLL functions");
return LIBUSB_ERROR_OTHER;
}
// Initialize the low level APIs (we don't care about errors at this stage)
for (i = 0; i < USB_API_MAX; i++) {
if (usb_api_backend[i].init && usb_api_backend[i].init(ctx))
usbi_warn(ctx, "error initializing %s backend",
usb_api_backend[i].designation);
}
return LIBUSB_SUCCESS;
}
/*
* exit: libusb backend deinitialization function
*/
static void winusb_exit(struct libusb_context *ctx)
{
int i;
for (i = 0; i < USB_API_MAX; i++) {
if (usb_api_backend[i].exit)
usb_api_backend[i].exit();
}
exit_dlls();
usbi_mutex_destroy(&autoclaim_lock);
}
/*
* fetch and cache all the config descriptors through I/O
*/
static void cache_config_descriptors(struct libusb_device *dev, HANDLE hub_handle)
{
struct libusb_context *ctx = DEVICE_CTX(dev);
struct winusb_device_priv *priv = _device_priv(dev);
DWORD size, ret_size;
uint8_t i;
USB_CONFIGURATION_DESCRIPTOR_SHORT cd_buf_short; // dummy request
PUSB_DESCRIPTOR_REQUEST cd_buf_actual = NULL; // actual request
PUSB_CONFIGURATION_DESCRIPTOR cd_data;
if (dev->num_configurations == 0)
return;
priv->config_descriptor = calloc(dev->num_configurations, sizeof(PUSB_CONFIGURATION_DESCRIPTOR));
if (priv->config_descriptor == NULL) {
usbi_err(ctx, "could not allocate configuration descriptor array for '%s'", priv->dev_id);
return;
}
for (i = 0; i <= dev->num_configurations; i++) {
safe_free(cd_buf_actual);
if (i == dev->num_configurations)
break;
size = sizeof(cd_buf_short);
memset(&cd_buf_short, 0, size);
cd_buf_short.req.ConnectionIndex = (ULONG)dev->port_number;
cd_buf_short.req.SetupPacket.bmRequest = LIBUSB_ENDPOINT_IN;
cd_buf_short.req.SetupPacket.bRequest = LIBUSB_REQUEST_GET_DESCRIPTOR;
cd_buf_short.req.SetupPacket.wValue = (LIBUSB_DT_CONFIG << 8) | i;
cd_buf_short.req.SetupPacket.wIndex = 0;
cd_buf_short.req.SetupPacket.wLength = (USHORT)sizeof(USB_CONFIGURATION_DESCRIPTOR);
// Dummy call to get the required data size. Initial failures are reported as info rather
// than error as they can occur for non-penalizing situations, such as with some hubs.
// coverity[tainted_data_argument]
if (!DeviceIoControl(hub_handle, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, &cd_buf_short, size,
&cd_buf_short, size, &ret_size, NULL)) {
usbi_info(ctx, "could not access configuration descriptor %u (dummy) for '%s': %s", i, priv->dev_id, windows_error_str(0));
continue;
}
if ((ret_size != size) || (cd_buf_short.desc.wTotalLength < sizeof(USB_CONFIGURATION_DESCRIPTOR))) {
usbi_info(ctx, "unexpected configuration descriptor %u size (dummy) for '%s'", i, priv->dev_id);
continue;
}
size = sizeof(USB_DESCRIPTOR_REQUEST) + cd_buf_short.desc.wTotalLength;
cd_buf_actual = malloc(size);
if (cd_buf_actual == NULL) {
usbi_err(ctx, "could not allocate configuration descriptor %u buffer for '%s'", i, priv->dev_id);
continue;
}
// Actual call
cd_buf_actual->ConnectionIndex = (ULONG)dev->port_number;
cd_buf_actual->SetupPacket.bmRequest = LIBUSB_ENDPOINT_IN;
cd_buf_actual->SetupPacket.bRequest = LIBUSB_REQUEST_GET_DESCRIPTOR;
cd_buf_actual->SetupPacket.wValue = (LIBUSB_DT_CONFIG << 8) | i;
cd_buf_actual->SetupPacket.wIndex = 0;
cd_buf_actual->SetupPacket.wLength = cd_buf_short.desc.wTotalLength;
if (!DeviceIoControl(hub_handle, IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION, cd_buf_actual, size,
cd_buf_actual, size, &ret_size, NULL)) {
usbi_err(ctx, "could not access configuration descriptor %u (actual) for '%s': %s", i, priv->dev_id, windows_error_str(0));
continue;
}
cd_data = (PUSB_CONFIGURATION_DESCRIPTOR)((UCHAR *)cd_buf_actual + sizeof(USB_DESCRIPTOR_REQUEST));
if ((size != ret_size) || (cd_data->wTotalLength != cd_buf_short.desc.wTotalLength)) {
usbi_err(ctx, "unexpected configuration descriptor %u size (actual) for '%s'", i, priv->dev_id);
continue;
}
if (cd_data->bDescriptorType != LIBUSB_DT_CONFIG) {
usbi_err(ctx, "descriptor %u not a configuration descriptor for '%s'", i, priv->dev_id);
continue;
}
usbi_dbg("cached config descriptor %u (bConfigurationValue=%u, %u bytes)",
i, cd_data->bConfigurationValue, cd_data->wTotalLength);
// Cache the descriptor
priv->config_descriptor[i] = malloc(cd_data->wTotalLength);
if (priv->config_descriptor[i] != NULL) {
memcpy(priv->config_descriptor[i], cd_data, cd_data->wTotalLength);
} else {
usbi_err(ctx, "could not allocate configuration descriptor %u buffer for '%s'", i, priv->dev_id);
}
}
}
/*
* Populate a libusb device structure
*/
static int init_device(struct libusb_device *dev, struct libusb_device *parent_dev,
uint8_t port_number, DEVINST devinst)
{
struct libusb_context *ctx;
struct libusb_device *tmp_dev;
struct winusb_device_priv *priv, *parent_priv;
USB_NODE_CONNECTION_INFORMATION_EX conn_info;
USB_NODE_CONNECTION_INFORMATION_EX_V2 conn_info_v2;
HANDLE hub_handle;
DWORD size;
uint8_t bus_number, depth;
int r;
int ginfotimeout;
priv = _device_priv(dev);
// If the device is already initialized, we can stop here
if (priv->initialized)
return LIBUSB_SUCCESS;
if (parent_dev != NULL) { // Not a HCD root hub
ctx = DEVICE_CTX(dev);
parent_priv = _device_priv(parent_dev);
if (parent_priv->apib->id != USB_API_HUB) {
usbi_warn(ctx, "parent for device '%s' is not a hub", priv->dev_id);
return LIBUSB_ERROR_NOT_FOUND;
}
// Calculate depth and fetch bus number
bus_number = parent_dev->bus_number;
if (bus_number == 0) {
tmp_dev = get_ancestor(ctx, devinst, &devinst);
if (tmp_dev != parent_dev) {
usbi_err(ctx, "program assertion failed - first ancestor is not parent");
return LIBUSB_ERROR_NOT_FOUND;
}
libusb_unref_device(tmp_dev);
for (depth = 1; bus_number == 0; depth++) {
tmp_dev = get_ancestor(ctx, devinst, &devinst);
if (tmp_dev->bus_number != 0) {
bus_number = tmp_dev->bus_number;
depth += _device_priv(tmp_dev)->depth;
}
libusb_unref_device(tmp_dev);
}
} else {
depth = parent_priv->depth + 1;
}
if (bus_number == 0) {
usbi_err(ctx, "program assertion failed - bus number not found for '%s'", priv->dev_id);
return LIBUSB_ERROR_NOT_FOUND;
}
dev->bus_number = bus_number;
dev->port_number = port_number;
dev->parent_dev = parent_dev;
priv->depth = depth;
hub_handle = CreateFileA(parent_priv->path, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
0, NULL);
if (hub_handle == INVALID_HANDLE_VALUE) {
usbi_warn(ctx, "could not open hub %s: %s", parent_priv->path, windows_error_str(0));
return LIBUSB_ERROR_ACCESS;
}
memset(&conn_info, 0, sizeof(conn_info));
conn_info.ConnectionIndex = (ULONG)port_number;
// coverity[tainted_data_argument]
ginfotimeout = 20;
do {
if (!DeviceIoControl(hub_handle, IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX, &conn_info, sizeof(conn_info),
&conn_info, sizeof(conn_info), &size, NULL)) {
usbi_warn(ctx, "could not get node connection information for device '%s': %s",
priv->dev_id, windows_error_str(0));
CloseHandle(hub_handle);
return LIBUSB_ERROR_NO_DEVICE;
}
if (conn_info.ConnectionStatus == NoDeviceConnected) {
usbi_err(ctx, "device '%s' is no longer connected!", priv->dev_id);
CloseHandle(hub_handle);
return LIBUSB_ERROR_NO_DEVICE;
}
memcpy(&priv->dev_descriptor, &(conn_info.DeviceDescriptor), sizeof(USB_DEVICE_DESCRIPTOR));
dev->num_configurations = priv->dev_descriptor.bNumConfigurations;
priv->active_config = conn_info.CurrentConfigurationValue;
if (priv->active_config == 0) {
usbi_dbg("0x%x:0x%x found %u configurations (active conf: %u) \n",
priv->dev_descriptor.idVendor,
priv->dev_descriptor.idProduct,
dev->num_configurations,
priv->active_config);
}
if (priv->active_config == 0)
Sleep(50);
} while (priv->active_config == 0 && --ginfotimeout >= 0);
if (priv->active_config == 0) {
usbi_dbg("after try 0x%x:0x%x found %u configurations (active conf: %u) \n",
priv->dev_descriptor.idVendor,
priv->dev_descriptor.idProduct,
dev->num_configurations,
priv->active_config);
usbi_dbg("Force this device active config to 1 in libusb! \nNOTICE: Should not reach this place!!!!!! \n");
priv->active_config = 1;
}
usbi_dbg("found %u configurations (active conf: %u)", dev->num_configurations, priv->active_config);
// Cache as many config descriptors as we can
cache_config_descriptors(dev, hub_handle);
// In their great wisdom, Microsoft decided to BREAK the USB speed report between Windows 7 and Windows 8
if (windows_version >= WINDOWS_8) {
conn_info_v2.ConnectionIndex = (ULONG)port_number;
conn_info_v2.Length = sizeof(USB_NODE_CONNECTION_INFORMATION_EX_V2);
conn_info_v2.SupportedUsbProtocols.Usb300 = 1;
if (!DeviceIoControl(hub_handle, IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX_V2,
&conn_info_v2, sizeof(conn_info_v2), &conn_info_v2, sizeof(conn_info_v2), &size, NULL)) {
usbi_warn(ctx, "could not get node connection information (V2) for device '%s': %s",
priv->dev_id, windows_error_str(0));
} else if (conn_info_v2.Flags.DeviceIsOperatingAtSuperSpeedOrHigher) {
conn_info.Speed = 3;
}
}
CloseHandle(hub_handle);
if (conn_info.DeviceAddress > UINT8_MAX)
usbi_err(ctx, "program assertion failed - device address overflow");
dev->device_address = (uint8_t)conn_info.DeviceAddress;
switch (conn_info.Speed) {
case 0: dev->speed = LIBUSB_SPEED_LOW; break;
case 1: dev->speed = LIBUSB_SPEED_FULL; break;
case 2: dev->speed = LIBUSB_SPEED_HIGH; break;
case 3: dev->speed = LIBUSB_SPEED_SUPER; break;
default:
usbi_warn(ctx, "unknown device speed %u", conn_info.Speed);
break;
}
}
r = usbi_sanitize_device(dev);
if (r)
return r;
priv->initialized = true;
usbi_dbg("(bus: %u, addr: %u, depth: %u, port: %u): '%s'",
dev->bus_number, dev->device_address, priv->depth, dev->port_number, priv->dev_id);
return LIBUSB_SUCCESS;
}
static int enumerate_hcd_root_hub(struct libusb_context *ctx, const char *dev_id,
uint8_t bus_number, DEVINST devinst)
{
struct libusb_device *dev;
struct winusb_device_priv *priv;
unsigned long session_id;
DEVINST child_devinst;
if (CM_Get_Child(&child_devinst, devinst, 0) != CR_SUCCESS) {
usbi_err(ctx, "could not get child devinst for '%s'", dev_id);
return LIBUSB_ERROR_OTHER;
}
session_id = (unsigned long)child_devinst;
dev = usbi_get_device_by_session_id(ctx, session_id);
if (dev == NULL) {
usbi_err(ctx, "program assertion failed - HCD '%s' child not found", dev_id);
return LIBUSB_ERROR_NO_DEVICE;
}
if (dev->bus_number == 0) {
// Only do this once
usbi_dbg("assigning HCD '%s' bus number %u", dev_id, bus_number);
priv = _device_priv(dev);
dev->bus_number = bus_number;
dev->num_configurations = 1;
priv->dev_descriptor.bLength = LIBUSB_DT_DEVICE_SIZE;
priv->dev_descriptor.bDescriptorType = LIBUSB_DT_DEVICE;
priv->dev_descriptor.bDeviceClass = LIBUSB_CLASS_HUB;
priv->dev_descriptor.bNumConfigurations = 1;
priv->active_config = 1;
priv->root_hub = true;
if (sscanf(dev_id, "PCI\\VEN_%04hx&DEV_%04hx%*s", &priv->dev_descriptor.idVendor, &priv->dev_descriptor.idProduct) != 2) {
usbi_warn(ctx, "could not infer VID/PID of HCD root hub from '%s'", dev_id);
priv->dev_descriptor.idVendor = 0x1d6b; // Linux Foundation root hub
priv->dev_descriptor.idProduct = 1;
}
}
libusb_unref_device(dev);
return LIBUSB_SUCCESS;
}
// Returns the api type, or 0 if not found/unsupported
static void get_api_type(struct libusb_context *ctx, HDEVINFO *dev_info,
SP_DEVINFO_DATA *dev_info_data, int *api, int *sub_api)
{
// Precedence for filter drivers vs driver is in the order of this array
struct driver_lookup lookup[3] = {
{"\0\0", SPDRP_SERVICE, "driver"},
{"\0\0", SPDRP_UPPERFILTERS, "upper filter driver"},
{"\0\0", SPDRP_LOWERFILTERS, "lower filter driver"}
};
DWORD size, reg_type;
unsigned k, l;
int i, j;
// Check the service & filter names to know the API we should use
for (k = 0; k < 3; k++) {
if (pSetupDiGetDeviceRegistryPropertyA(*dev_info, dev_info_data, lookup[k].reg_prop,
&reg_type, (PBYTE)lookup[k].list, MAX_KEY_LENGTH, &size)) {
// Turn the REG_SZ SPDRP_SERVICE into REG_MULTI_SZ
if (lookup[k].reg_prop == SPDRP_SERVICE)
// our buffers are MAX_KEY_LENGTH + 1 so we can overflow if needed
lookup[k].list[strlen(lookup[k].list) + 1] = 0;
// MULTI_SZ is a pain to work with. Turn it into something much more manageable
// NB: none of the driver names we check against contain LIST_SEPARATOR,
// (currently ';'), so even if an unsuported one does, it's not an issue
for (l = 0; (lookup[k].list[l] != 0) || (lookup[k].list[l + 1] != 0); l++) {
if (lookup[k].list[l] == 0)
lookup[k].list[l] = LIST_SEPARATOR;
}
usbi_dbg("%s(s): %s", lookup[k].designation, lookup[k].list);
} else {
if (GetLastError() != ERROR_INVALID_DATA)
usbi_dbg("could not access %s: %s", lookup[k].designation, windows_error_str(0));
lookup[k].list[0] = 0;
}
}
for (i = 2; i < USB_API_MAX; i++) {
for (k = 0; k < 3; k++) {
j = get_sub_api(lookup[k].list, i);
if (j >= 0) {
usbi_dbg("matched %s name against %s", lookup[k].designation,
(i != USB_API_WINUSBX) ? usb_api_backend[i].designation : usb_api_backend[i].driver_name_list[j]);
*api = i;
*sub_api = j;
return;
}
}
}
}
static int set_composite_interface(struct libusb_context *ctx, struct libusb_device *dev,
char *dev_interface_path, char *device_id, int api, int sub_api)
{
struct winusb_device_priv *priv = _device_priv(dev);
int interface_number;
const char *mi_str;
// Because MI_## are not necessarily in sequential order (some composite
// devices will have only MI_00 & MI_03 for instance), we retrieve the actual
// interface number from the path's MI value
mi_str = strstr(device_id, "MI_");
if ((mi_str != NULL) && isdigit(mi_str[3]) && isdigit(mi_str[4])) {
interface_number = ((mi_str[3] - '0') * 10) + (mi_str[4] - '0');
} else {
usbi_warn(ctx, "failure to read interface number for %s, using default value", device_id);
interface_number = 0;
}
if (interface_number >= USB_MAXINTERFACES) {
usbi_warn(ctx, "interface %d too large - ignoring interface path %s", interface_number, dev_interface_path);
return LIBUSB_ERROR_ACCESS;
}
if (priv->usb_interface[interface_number].path != NULL) {
if (api == USB_API_HID) {
// HID devices can have multiple collections (COL##) for each MI_## interface
usbi_dbg("interface[%d] already set - ignoring HID collection: %s",
interface_number, device_id);
return LIBUSB_ERROR_ACCESS;
}
// In other cases, just use the latest data
safe_free(priv->usb_interface[interface_number].path);
}
usbi_dbg("interface[%d] = %s", interface_number, dev_interface_path);
priv->usb_interface[interface_number].path = dev_interface_path;
priv->usb_interface[interface_number].apib = &usb_api_backend[api];
priv->usb_interface[interface_number].sub_api = sub_api;
if ((api == USB_API_HID) && (priv->hid == NULL)) {
priv->hid = calloc(1, sizeof(struct hid_device_priv));
if (priv->hid == NULL)
return LIBUSB_ERROR_NO_MEM;
}
return LIBUSB_SUCCESS;
}
static int set_hid_interface(struct libusb_context *ctx, struct libusb_device *dev,
char *dev_interface_path)
{
int i;
struct winusb_device_priv *priv = _device_priv(dev);
if (priv->hid == NULL) {
usbi_err(ctx, "program assertion failed: parent is not HID");
return LIBUSB_ERROR_NO_DEVICE;
} else if (priv->hid->nb_interfaces == USB_MAXINTERFACES) {
usbi_err(ctx, "program assertion failed: max USB interfaces reached for HID device");
return LIBUSB_ERROR_NO_DEVICE;
}
for (i = 0; i < priv->hid->nb_interfaces; i++) {
if ((priv->usb_interface[i].path != NULL) && strcmp(priv->usb_interface[i].path, dev_interface_path) == 0) {
usbi_dbg("interface[%d] already set to %s", i, dev_interface_path);
return LIBUSB_ERROR_ACCESS;
}
}
priv->usb_interface[priv->hid->nb_interfaces].path = dev_interface_path;
priv->usb_interface[priv->hid->nb_interfaces].apib = &usb_api_backend[USB_API_HID];
usbi_dbg("interface[%u] = %s", priv->hid->nb_interfaces, dev_interface_path);
priv->hid->nb_interfaces++;
return LIBUSB_SUCCESS;
}
/*
* get_device_list: libusb backend device enumeration function
*/
static int winusb_get_device_list(struct libusb_context *ctx, struct discovered_devs **_discdevs)
{
struct discovered_devs *discdevs;
HDEVINFO *dev_info, dev_info_intf, dev_info_enum;
SP_DEVINFO_DATA dev_info_data;
DWORD _index = 0;
GUID hid_guid;
int r = LIBUSB_SUCCESS;
int api, sub_api;
unsigned int pass, i, j;
char enumerator[16];
char dev_id[MAX_PATH_LENGTH];
struct libusb_device *dev, *parent_dev;
struct winusb_device_priv *priv, *parent_priv;
char *dev_interface_path = NULL;
unsigned long session_id;
DWORD size, port_nr, reg_type, install_state;
HKEY key;
WCHAR guid_string_w[MAX_GUID_STRING_LENGTH];
GUID *if_guid;
LONG s;
#define HUB_PASS 0
#define DEV_PASS 1
#define HCD_PASS 2
#define GEN_PASS 3
#define HID_PASS 4
#define EXT_PASS 5
// Keep a list of guids that will be enumerated
#define GUID_SIZE_STEP 8
const GUID **guid_list, **new_guid_list;
unsigned int guid_size = GUID_SIZE_STEP;
unsigned int nb_guids;
// Keep a list of PnP enumerator strings that are found
char *usb_enumerator[8] = { "USB" };
unsigned int nb_usb_enumerators = 1;
unsigned int usb_enum_index = 0;
// Keep a list of newly allocated devs to unref
#define UNREF_SIZE_STEP 16
libusb_device **unref_list, **new_unref_list;
unsigned int unref_size = UNREF_SIZE_STEP;
unsigned int unref_cur = 0;
// PASS 1 : (re)enumerate HCDs (allows for HCD hotplug)
// PASS 2 : (re)enumerate HUBS
// PASS 3 : (re)enumerate generic USB devices (including driverless)
// and list additional USB device interface GUIDs to explore
// PASS 4 : (re)enumerate master USB devices that have a device interface
// PASS 5+: (re)enumerate device interfaced GUIDs (including HID) and
// set the device interfaces.
// Init the GUID table
guid_list = malloc(guid_size * sizeof(void *));
if (guid_list == NULL) {
usbi_err(ctx, "failed to alloc guid list");
return LIBUSB_ERROR_NO_MEM;
}
guid_list[HUB_PASS] = &GUID_DEVINTERFACE_USB_HUB;
guid_list[DEV_PASS] = &GUID_DEVINTERFACE_USB_DEVICE;
guid_list[HCD_PASS] = &GUID_DEVINTERFACE_USB_HOST_CONTROLLER;
guid_list[GEN_PASS] = NULL;
if (api_hid_available) {
HidD_GetHidGuid(&hid_guid);
guid_list[HID_PASS] = &hid_guid;
} else {
guid_list[HID_PASS] = NULL;
}
nb_guids = EXT_PASS;
unref_list = malloc(unref_size * sizeof(void *));
if (unref_list == NULL) {
usbi_err(ctx, "failed to alloc unref list");
free((void *)guid_list);
return LIBUSB_ERROR_NO_MEM;
}
dev_info_intf = pSetupDiGetClassDevsA(NULL, NULL, NULL, DIGCF_ALLCLASSES | DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
if (dev_info_intf == INVALID_HANDLE_VALUE) {
usbi_err(ctx, "failed to obtain device info list: %s", windows_error_str(0));
free(unref_list);
free((void *)guid_list);
return LIBUSB_ERROR_OTHER;
}
for (pass = 0; ((pass < nb_guids) && (r == LIBUSB_SUCCESS)); pass++) {
//#define ENUM_DEBUG
#if defined(ENABLE_LOGGING) && defined(ENUM_DEBUG)
const char * const passname[] = {"HUB", "DEV", "HCD", "GEN", "HID", "EXT"};
usbi_dbg("#### PROCESSING %ss %s", passname[MIN(pass, EXT_PASS)], guid_to_string(guid_list[pass]));
#endif
if ((pass == HID_PASS) && (guid_list[HID_PASS] == NULL))
continue;
dev_info = (pass != GEN_PASS) ? &dev_info_intf : &dev_info_enum;
for (i = 0; ; i++) {
// safe loop: free up any (unprotected) dynamic resource
// NB: this is always executed before breaking the loop
safe_free(dev_interface_path);
priv = parent_priv = NULL;
dev = parent_dev = NULL;
// Safe loop: end of loop conditions
if (r != LIBUSB_SUCCESS)
break;
if ((pass == HCD_PASS) && (i == UINT8_MAX)) {
usbi_warn(ctx, "program assertion failed - found more than %u buses, skipping the rest.", UINT8_MAX);
break;
}
if (pass != GEN_PASS) {
// Except for GEN, all passes deal with device interfaces
r = get_interface_details(ctx, *dev_info, &dev_info_data, guid_list[pass], &_index, &dev_interface_path);
if ((r != LIBUSB_SUCCESS) || (dev_interface_path == NULL)) {
_index = 0;
break;
}
} else {
// Workaround for a Nec/Renesas USB 3.0 driver bug where root hubs are
// being listed under the "NUSB3" PnP Symbolic Name rather than "USB".
// The Intel USB 3.0 driver behaves similar, but uses "IUSB3"
// The Intel Alpine Ridge USB 3.1 driver uses "IARUSB3"
for (; usb_enum_index < nb_usb_enumerators; usb_enum_index++) {
if (get_devinfo_data(ctx, dev_info, &dev_info_data, usb_enumerator[usb_enum_index], i))
break;
i = 0;
}
if (usb_enum_index == nb_usb_enumerators)
break;
}
// Read the Device ID path
if (!pSetupDiGetDeviceInstanceIdA(*dev_info, &dev_info_data, dev_id, sizeof(dev_id), NULL)) {
usbi_warn(ctx, "could not read the device instance ID for devInst %X, skipping",
dev_info_data.DevInst);
continue;
}
#ifdef ENUM_DEBUG
usbi_dbg("PRO: %s", dev_id);
#endif
// Set API to use or get additional data from generic pass
api = USB_API_UNSUPPORTED;
sub_api = SUB_API_NOTSET;
switch (pass) {
case HCD_PASS:
break;
case HUB_PASS:
api = USB_API_HUB;
// Fetch the PnP enumerator class for this hub
// This will allow us to enumerate all classes during the GEN pass
if (!pSetupDiGetDeviceRegistryPropertyA(*dev_info, &dev_info_data, SPDRP_ENUMERATOR_NAME,
NULL, (PBYTE)enumerator, sizeof(enumerator), NULL)) {
usbi_err(ctx, "could not read enumerator string for device '%s': %s", dev_id, windows_error_str(0));
LOOP_BREAK(LIBUSB_ERROR_OTHER);
}
for (j = 0; j < nb_usb_enumerators; j++) {
if (strcmp(usb_enumerator[j], enumerator) == 0)
break;
}
if (j == nb_usb_enumerators) {
usbi_dbg("found new PnP enumerator string '%s'", enumerator);
if (nb_usb_enumerators < ARRAYSIZE(usb_enumerator)) {
usb_enumerator[nb_usb_enumerators] = _strdup(enumerator);
if (usb_enumerator[nb_usb_enumerators] != NULL) {
nb_usb_enumerators++;
} else {
usbi_err(ctx, "could not allocate enumerator string '%s'", enumerator);
LOOP_BREAK(LIBUSB_ERROR_NO_MEM);
}
} else {
usbi_warn(ctx, "too many enumerator strings, some devices may not be accessible");
}
}
break;
case GEN_PASS:
// We use the GEN pass to detect driverless devices...
if (!pSetupDiGetDeviceRegistryPropertyA(*dev_info, &dev_info_data, SPDRP_DRIVER,
NULL, NULL, 0, NULL) && (GetLastError() != ERROR_INSUFFICIENT_BUFFER)) {
usbi_info(ctx, "The following device has no driver: '%s'", dev_id);
usbi_info(ctx, "libusb will not be able to access it");
}
// ...and to add the additional device interface GUIDs
key = pSetupDiOpenDevRegKey(*dev_info, &dev_info_data, DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_READ);
if (key == INVALID_HANDLE_VALUE)
break;
// Look for both DeviceInterfaceGUIDs *and* DeviceInterfaceGUID, in that order
size = sizeof(guid_string_w);
s = pRegQueryValueExW(key, L"DeviceInterfaceGUIDs", NULL, &reg_type,
(LPBYTE)guid_string_w, &size);
if (s == ERROR_FILE_NOT_FOUND)
s = pRegQueryValueExW(key, L"DeviceInterfaceGUID", NULL, &reg_type,
(LPBYTE)guid_string_w, &size);
pRegCloseKey(key);
if ((s == ERROR_SUCCESS) &&
(((reg_type == REG_SZ) && (size == (sizeof(guid_string_w) - sizeof(WCHAR)))) ||
((reg_type == REG_MULTI_SZ) && (size == sizeof(guid_string_w))))) {
if (nb_guids == guid_size) {
new_guid_list = realloc((void *)guid_list, (guid_size + GUID_SIZE_STEP) * sizeof(void *));
if (new_guid_list == NULL) {
usbi_err(ctx, "failed to realloc guid list");
LOOP_BREAK(LIBUSB_ERROR_NO_MEM);
}
guid_list = new_guid_list;
guid_size += GUID_SIZE_STEP;
}
if_guid = malloc(sizeof(*if_guid));
if (if_guid == NULL) {
usbi_err(ctx, "failed to alloc if_guid");
LOOP_BREAK(LIBUSB_ERROR_NO_MEM);
}
if (pIIDFromString(guid_string_w, if_guid) != 0) {
usbi_warn(ctx, "device '%s' has malformed DeviceInterfaceGUID string, skipping", dev_id);
free(if_guid);
} else {
// Check if we've already seen this GUID
for (j = EXT_PASS; j < nb_guids; j++) {
if (memcmp(guid_list[j], if_guid, sizeof(*if_guid)) == 0)
break;
}
if (j == nb_guids) {
usbi_dbg("extra GUID: %s", guid_to_string(if_guid));
guid_list[nb_guids++] = if_guid;
} else {
// Duplicate, ignore
free(if_guid);
}
}
} else if (s == ERROR_SUCCESS) {
usbi_warn(ctx, "unexpected type/size of DeviceInterfaceGUID for '%s'", dev_id);
}
break;
case HID_PASS:
api = USB_API_HID;
break;
default:
// Get the API type (after checking that the driver installation is OK)
if ((!pSetupDiGetDeviceRegistryPropertyA(*dev_info, &dev_info_data, SPDRP_INSTALL_STATE,
NULL, (PBYTE)&install_state, sizeof(install_state), &size)) || (size != sizeof(install_state))) {
usbi_warn(ctx, "could not detect installation state of driver for '%s': %s",
dev_id, windows_error_str(0));
} else if (install_state != 0) {
usbi_warn(ctx, "driver for device '%s' is reporting an issue (code: %u) - skipping",
dev_id, (unsigned int)install_state);
continue;
}
get_api_type(ctx, dev_info, &dev_info_data, &api, &sub_api);
break;
}
// Find parent device (for the passes that need it)
if (pass >= GEN_PASS) {
parent_dev = get_ancestor(ctx, dev_info_data.DevInst, NULL);
if (parent_dev == NULL) {
// Root hubs will not have a parent
dev = usbi_get_device_by_session_id(ctx, (unsigned long)dev_info_data.DevInst);
if (dev != NULL) {
priv = _device_priv(dev);
if (priv->root_hub)
goto track_unref;
libusb_unref_device(dev);
}
usbi_dbg("unlisted ancestor for '%s' (non USB HID, newly connected, etc.) - ignoring", dev_id);
continue;
}
parent_priv = _device_priv(parent_dev);
// virtual USB devices are also listed during GEN - don't process these yet
if ((pass == GEN_PASS) && (parent_priv->apib->id != USB_API_HUB)) {
libusb_unref_device(parent_dev);
continue;
}
}
// Create new or match existing device, using the devInst as session id
if ((pass <= GEN_PASS) && (pass != HCD_PASS)) { // For subsequent passes, we'll lookup the parent
// These are the passes that create "new" devices
session_id = (unsigned long)dev_info_data.DevInst;
dev = usbi_get_device_by_session_id(ctx, session_id);
if (dev == NULL) {
alloc_device:
usbi_dbg("allocating new device for session [%lX]", session_id);
dev = usbi_alloc_device(ctx, session_id);
if (dev == NULL)
LOOP_BREAK(LIBUSB_ERROR_NO_MEM);
priv = winusb_device_priv_init(dev);
priv->dev_id = _strdup(dev_id);
if (priv->dev_id == NULL) {
libusb_unref_device(dev);
LOOP_BREAK(LIBUSB_ERROR_NO_MEM);
}
} else {
usbi_dbg("found existing device for session [%lX]", session_id);
priv = _device_priv(dev);
if (strcmp(priv->dev_id, dev_id) != 0) {
usbi_dbg("device instance ID for session [%lX] changed", session_id);
usbi_disconnect_device(dev);
libusb_unref_device(dev);
goto alloc_device;
}
}
track_unref:
// Keep track of devices that need unref
if (unref_cur == unref_size) {
new_unref_list = realloc(unref_list, (unref_size + UNREF_SIZE_STEP) * sizeof(void *));
if (new_unref_list == NULL) {
usbi_err(ctx, "could not realloc list for unref - aborting");
LOOP_BREAK(LIBUSB_ERROR_NO_MEM);
}
unref_list = new_unref_list;
unref_size += UNREF_SIZE_STEP;
}
unref_list[unref_cur++] = dev;
}
// Setup device
switch (pass) {
case HUB_PASS:
case DEV_PASS:
// If the device has already been setup, don't do it again
if (priv->path != NULL)
break;
// Take care of API initialization
priv->path = dev_interface_path;
dev_interface_path = NULL;
priv->apib = &usb_api_backend[api];
priv->sub_api = sub_api;
switch (api) {
case USB_API_COMPOSITE:
case USB_API_HUB:
break;
case USB_API_HID:
priv->hid = calloc(1, sizeof(struct hid_device_priv));
if (priv->hid == NULL)
LOOP_BREAK(LIBUSB_ERROR_NO_MEM);
break;
default:
// For other devices, the first interface is the same as the device
priv->usb_interface[0].path = _strdup(priv->path);
if (priv->usb_interface[0].path == NULL)
LOOP_BREAK(LIBUSB_ERROR_NO_MEM);
// The following is needed if we want API calls to work for both simple
// and composite devices.
for (j = 0; j < USB_MAXINTERFACES; j++)
priv->usb_interface[j].apib = &usb_api_backend[api];
break;
}
break;
case HCD_PASS:
r = enumerate_hcd_root_hub(ctx, dev_id, (uint8_t)(i + 1), dev_info_data.DevInst);
break;
case GEN_PASS:
// The SPDRP_ADDRESS for USB devices is the device port number on the hub
port_nr = 0;
if (!pSetupDiGetDeviceRegistryPropertyA(*dev_info, &dev_info_data, SPDRP_ADDRESS,
NULL, (PBYTE)&port_nr, sizeof(port_nr), &size) || (size != sizeof(port_nr)))
usbi_warn(ctx, "could not retrieve port number for device '%s': %s", dev_id, windows_error_str(0));
r = init_device(dev, parent_dev, (uint8_t)port_nr, dev_info_data.DevInst);
if (r == LIBUSB_SUCCESS) {
// Append device to the list of discovered devices
discdevs = discovered_devs_append(*_discdevs, dev);
if (!discdevs)
LOOP_BREAK(LIBUSB_ERROR_NO_MEM);
*_discdevs = discdevs;
} else if (r == LIBUSB_ERROR_NO_DEVICE) {
// This can occur if the device was disconnected but Windows hasn't
// refreshed its enumeration yet - in that case, we ignore the device
r = LIBUSB_SUCCESS;
}
break;
default: // HID_PASS and later
if (parent_priv->apib->id == USB_API_HID || parent_priv->apib->id == USB_API_COMPOSITE) {
if (parent_priv->apib->id == USB_API_HID) {
usbi_dbg("setting HID interface for [%lX]:", parent_dev->session_data);
r = set_hid_interface(ctx, parent_dev, dev_interface_path);
} else {
usbi_dbg("setting composite interface for [%lX]:", parent_dev->session_data);
r = set_composite_interface(ctx, parent_dev, dev_interface_path, dev_id, api, sub_api);
}
switch (r) {
case LIBUSB_SUCCESS:
dev_interface_path = NULL;
break;
case LIBUSB_ERROR_ACCESS:
// interface has already been set => make sure dev_interface_path is freed then
r = LIBUSB_SUCCESS;
break;
default:
LOOP_BREAK(r);
break;
}
}
libusb_unref_device(parent_dev);
break;
}
}
}
pSetupDiDestroyDeviceInfoList(dev_info_intf);
// Free any additional GUIDs
for (pass = EXT_PASS; pass < nb_guids; pass++)
free((void *)guid_list[pass]);
free((void *)guid_list);
// Free any PnP enumerator strings
for (i = 1; i < nb_usb_enumerators; i++)
free(usb_enumerator[i]);
// Unref newly allocated devs
for (i = 0; i < unref_cur; i++)
libusb_unref_device(unref_list[i]);
free(unref_list);
return r;
}
static int winusb_get_device_descriptor(struct libusb_device *dev, unsigned char *buffer)
{
struct winusb_device_priv *priv = _device_priv(dev);
memcpy(buffer, &priv->dev_descriptor, DEVICE_DESC_LENGTH);
return LIBUSB_SUCCESS;
}
static int winusb_get_config_descriptor(struct libusb_device *dev, uint8_t config_index, unsigned char *buffer, size_t len)
{
struct winusb_device_priv *priv = _device_priv(dev);
PUSB_CONFIGURATION_DESCRIPTOR config_header;
size_t size;
// config index is zero based
if (config_index >= dev->num_configurations)
return LIBUSB_ERROR_INVALID_PARAM;
if ((priv->config_descriptor == NULL) || (priv->config_descriptor[config_index] == NULL))
return LIBUSB_ERROR_NOT_FOUND;
config_header = priv->config_descriptor[config_index];
size = MIN(config_header->wTotalLength, len);
memcpy(buffer, priv->config_descriptor[config_index], size);
return (int)size;
}
static int winusb_get_config_descriptor_by_value(struct libusb_device *dev, uint8_t bConfigurationValue,
unsigned char **buffer)
{
struct winusb_device_priv *priv = _device_priv(dev);
PUSB_CONFIGURATION_DESCRIPTOR config_header;
uint8_t index;
if (priv->config_descriptor == NULL)
return LIBUSB_ERROR_NOT_FOUND;
for (index = 0; index < dev->num_configurations; index++) {
config_header = priv->config_descriptor[index];
if (config_header == NULL)
continue;
if (config_header->bConfigurationValue == bConfigurationValue) {
*buffer = (unsigned char *)priv->config_descriptor[index];
return (int)config_header->wTotalLength;
}
}
return LIBUSB_ERROR_NOT_FOUND;
}
/*
* return the cached copy of the active config descriptor
*/
static int winusb_get_active_config_descriptor(struct libusb_device *dev, unsigned char *buffer, size_t len)
{
struct winusb_device_priv *priv = _device_priv(dev);
unsigned char *config_desc;
int r;
if (priv->active_config == 0)
return LIBUSB_ERROR_NOT_FOUND;
r = winusb_get_config_descriptor_by_value(dev, priv->active_config, &config_desc);
if (r < 0)
return r;
len = MIN((size_t)r, len);
memcpy(buffer, config_desc, len);
return (int)len;
}
static int winusb_open(struct libusb_device_handle *dev_handle)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
CHECK_SUPPORTED_API(priv->apib, open);
return priv->apib->open(SUB_API_NOTSET, dev_handle);
}
static void winusb_close(struct libusb_device_handle *dev_handle)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
if (priv->apib->close)
priv->apib->close(SUB_API_NOTSET, dev_handle);
}
static int winusb_get_configuration(struct libusb_device_handle *dev_handle, int *config)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
if (priv->active_config == 0) {
*config = 0;
return LIBUSB_ERROR_NOT_FOUND;
}
*config = priv->active_config;
return LIBUSB_SUCCESS;
}
/*
* from http://msdn.microsoft.com/en-us/library/ms793522.aspx: "The port driver
* does not currently expose a service that allows higher-level drivers to set
* the configuration."
*/
static int winusb_set_configuration(struct libusb_device_handle *dev_handle, int config)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
int r = LIBUSB_SUCCESS;
if (config >= USB_MAXCONFIG)
return LIBUSB_ERROR_INVALID_PARAM;
r = libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_OUT |
LIBUSB_REQUEST_TYPE_STANDARD | LIBUSB_RECIPIENT_DEVICE,
LIBUSB_REQUEST_SET_CONFIGURATION, (uint16_t)config,
0, NULL, 0, 1000);
if (r == LIBUSB_SUCCESS)
priv->active_config = (uint8_t)config;
return r;
}
static int winusb_claim_interface(struct libusb_device_handle *dev_handle, int iface)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
int r;
CHECK_SUPPORTED_API(priv->apib, claim_interface);
safe_free(priv->usb_interface[iface].endpoint);
priv->usb_interface[iface].nb_endpoints = 0;
r = priv->apib->claim_interface(SUB_API_NOTSET, dev_handle, iface);
if (r == LIBUSB_SUCCESS)
r = windows_assign_endpoints(dev_handle, iface, 0);
return r;
}
static int winusb_set_interface_altsetting(struct libusb_device_handle *dev_handle, int iface, int altsetting)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
int r;
CHECK_SUPPORTED_API(priv->apib, set_interface_altsetting);
safe_free(priv->usb_interface[iface].endpoint);
priv->usb_interface[iface].nb_endpoints = 0;
r = priv->apib->set_interface_altsetting(SUB_API_NOTSET, dev_handle, iface, altsetting);
if (r == LIBUSB_SUCCESS)
r = windows_assign_endpoints(dev_handle, iface, altsetting);
return r;
}
static int winusb_release_interface(struct libusb_device_handle *dev_handle, int iface)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
CHECK_SUPPORTED_API(priv->apib, release_interface);
return priv->apib->release_interface(SUB_API_NOTSET, dev_handle, iface);
}
static int winusb_clear_halt(struct libusb_device_handle *dev_handle, unsigned char endpoint)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
CHECK_SUPPORTED_API(priv->apib, clear_halt);
return priv->apib->clear_halt(SUB_API_NOTSET, dev_handle, endpoint);
}
static int winusb_reset_device(struct libusb_device_handle *dev_handle)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
CHECK_SUPPORTED_API(priv->apib, reset_device);
return priv->apib->reset_device(SUB_API_NOTSET, dev_handle);
}
static void winusb_destroy_device(struct libusb_device *dev)
{
winusb_device_priv_release(dev);
}
static void winusb_clear_transfer_priv(struct usbi_transfer *itransfer)
{
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
int sub_api = priv->sub_api;
usbi_close(transfer_priv->pollable_fd.fd);
transfer_priv->pollable_fd = INVALID_WINFD;
transfer_priv->handle = NULL;
safe_free(transfer_priv->hid_buffer);
if (transfer->type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS && sub_api == SUB_API_WINUSB) {
if (transfer_priv->isoch_buffer_handle != NULL) {
if (WinUSBX[sub_api].UnregisterIsochBuffer(transfer_priv->isoch_buffer_handle)) {
transfer_priv->isoch_buffer_handle = NULL;
} else {
usbi_dbg("Couldn't unregister isoch buffer!");
}
}
}
safe_free(transfer_priv->iso_context);
// When auto claim is in use, attempt to release the auto-claimed interface
auto_release(itransfer);
}
static int do_submit_transfer(struct usbi_transfer *itransfer, short events,
int (*transfer_fn)(int, struct usbi_transfer *))
{
struct libusb_context *ctx = ITRANSFER_CTX(itransfer);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winfd wfd;
int r;
wfd = usbi_create_fd();
if (wfd.fd < 0)
return LIBUSB_ERROR_NO_MEM;
r = usbi_add_pollfd(ctx, wfd.fd, events);
if (r) {
usbi_close(wfd.fd);
return r;
}
// Use transfer_priv to store data needed for async polling
transfer_priv->pollable_fd = wfd;
r = transfer_fn(SUB_API_NOTSET, itransfer);
if ((r != LIBUSB_SUCCESS) && (r != LIBUSB_ERROR_OVERFLOW)) {
usbi_remove_pollfd(ctx, wfd.fd);
usbi_close(wfd.fd);
transfer_priv->pollable_fd = INVALID_WINFD;
}
return r;
}
static int winusb_submit_transfer(struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
int (*transfer_fn)(int, struct usbi_transfer *);
short events;
switch (transfer->type) {
case LIBUSB_TRANSFER_TYPE_CONTROL:
events = (transfer->buffer[0] & LIBUSB_ENDPOINT_IN) ? POLLIN : POLLOUT;
transfer_fn = priv->apib->submit_control_transfer;
break;
case LIBUSB_TRANSFER_TYPE_BULK:
case LIBUSB_TRANSFER_TYPE_INTERRUPT:
if (IS_XFEROUT(transfer) && (transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET))
return LIBUSB_ERROR_NOT_SUPPORTED;
events = IS_XFERIN(transfer) ? POLLIN : POLLOUT;
transfer_fn = priv->apib->submit_bulk_transfer;
break;
case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
events = IS_XFERIN(transfer) ? POLLIN : POLLOUT;
transfer_fn = priv->apib->submit_iso_transfer;
break;
case LIBUSB_TRANSFER_TYPE_BULK_STREAM:
return LIBUSB_ERROR_NOT_SUPPORTED;
default:
usbi_err(TRANSFER_CTX(transfer), "unknown endpoint type %d", transfer->type);
return LIBUSB_ERROR_INVALID_PARAM;
}
if (transfer_fn == NULL) {
usbi_warn(TRANSFER_CTX(transfer),
"unsupported transfer type %d (unrecognized device driver)",
transfer->type);
return LIBUSB_ERROR_NOT_SUPPORTED;
}
return do_submit_transfer(itransfer, events, transfer_fn);
}
static int windows_abort_control(struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
CHECK_SUPPORTED_API(priv->apib, abort_control);
return priv->apib->abort_control(SUB_API_NOTSET, itransfer);
}
static int windows_abort_transfers(struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
CHECK_SUPPORTED_API(priv->apib, abort_transfers);
return priv->apib->abort_transfers(SUB_API_NOTSET, itransfer);
}
static int winusb_cancel_transfer(struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
switch (transfer->type) {
case LIBUSB_TRANSFER_TYPE_CONTROL:
return windows_abort_control(itransfer);
case LIBUSB_TRANSFER_TYPE_BULK:
case LIBUSB_TRANSFER_TYPE_INTERRUPT:
case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
return windows_abort_transfers(itransfer);
case LIBUSB_TRANSFER_TYPE_BULK_STREAM:
return LIBUSB_ERROR_NOT_SUPPORTED;
default:
usbi_err(ITRANSFER_CTX(itransfer), "unknown endpoint type %d", transfer->type);
return LIBUSB_ERROR_INVALID_PARAM;
}
}
static int winusb_copy_transfer_data(struct usbi_transfer *itransfer, uint32_t io_size)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
return priv->apib->copy_transfer_data(SUB_API_NOTSET, itransfer, io_size);
}
static int winusb_get_transfer_fd(struct usbi_transfer *itransfer)
{
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
return transfer_priv->pollable_fd.fd;
}
static void winusb_get_overlapped_result(struct usbi_transfer *itransfer,
DWORD *io_result, DWORD *io_size)
{
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winfd *pollable_fd = &transfer_priv->pollable_fd;
if (HasOverlappedIoCompletedSync(pollable_fd->overlapped)) {
*io_result = NO_ERROR;
*io_size = (DWORD)pollable_fd->overlapped->InternalHigh;
} else if (GetOverlappedResult(transfer_priv->handle, pollable_fd->overlapped, io_size, FALSE)) {
// Regular async overlapped
*io_result = NO_ERROR;
} else {
*io_result = GetLastError();
}
}
// NB: MSVC6 does not support named initializers.
const struct windows_backend winusb_backend = {
winusb_init,
winusb_exit,
winusb_get_device_list,
winusb_open,
winusb_close,
winusb_get_device_descriptor,
winusb_get_active_config_descriptor,
winusb_get_config_descriptor,
winusb_get_config_descriptor_by_value,
winusb_get_configuration,
winusb_set_configuration,
winusb_claim_interface,
winusb_release_interface,
winusb_set_interface_altsetting,
winusb_clear_halt,
winusb_reset_device,
winusb_destroy_device,
winusb_submit_transfer,
winusb_cancel_transfer,
winusb_clear_transfer_priv,
winusb_copy_transfer_data,
winusb_get_transfer_fd,
winusb_get_overlapped_result,
};
/*
* USB API backends
*/
static const char * const composite_driver_names[] = {"USBCCGP"};
static const char * const winusbx_driver_names[] = {"libusbK", "libusb0", "WinUSB"};
static const char * const hid_driver_names[] = {"HIDUSB", "MOUHID", "KBDHID"};
const struct windows_usb_api_backend usb_api_backend[USB_API_MAX] = {
{
USB_API_UNSUPPORTED,
"Unsupported API",
// No supported operations
},
{
USB_API_HUB,
"HUB API",
// No supported operations
},
{
USB_API_COMPOSITE,
"Composite API",
composite_driver_names,
ARRAYSIZE(composite_driver_names),
NULL, /* init */
NULL, /* exit */
composite_open,
composite_close,
NULL, /* configure_endpoints */
composite_claim_interface,
composite_set_interface_altsetting,
composite_release_interface,
composite_clear_halt,
composite_reset_device,
composite_submit_bulk_transfer,
composite_submit_iso_transfer,
composite_submit_control_transfer,
composite_abort_control,
composite_abort_transfers,
composite_copy_transfer_data,
},
{
USB_API_WINUSBX,
"WinUSB-like APIs",
winusbx_driver_names,
ARRAYSIZE(winusbx_driver_names),
winusbx_init,
winusbx_exit,
winusbx_open,
winusbx_close,
winusbx_configure_endpoints,
winusbx_claim_interface,
winusbx_set_interface_altsetting,
winusbx_release_interface,
winusbx_clear_halt,
winusbx_reset_device,
winusbx_submit_bulk_transfer,
winusbx_submit_iso_transfer,
winusbx_submit_control_transfer,
winusbx_abort_control,
winusbx_abort_transfers,
winusbx_copy_transfer_data,
},
{
USB_API_HID,
"HID API",
hid_driver_names,
ARRAYSIZE(hid_driver_names),
hid_init,
hid_exit,
hid_open,
hid_close,
NULL, /* configure_endpoints */
hid_claim_interface,
hid_set_interface_altsetting,
hid_release_interface,
hid_clear_halt,
hid_reset_device,
hid_submit_bulk_transfer,
NULL, /* submit_iso_transfer */
hid_submit_control_transfer,
hid_abort_transfers,
hid_abort_transfers,
hid_copy_transfer_data,
},
};
/*
* WinUSB-like (WinUSB, libusb0/libusbK through libusbk DLL) API functions
*/
#define WinUSBX_Set(fn) \
do { \
if (native_winusb) \
WinUSBX[i].fn = (WinUsb_##fn##_t)GetProcAddress(h, "WinUsb_" #fn); \
else \
pLibK_GetProcAddress((PVOID *)&WinUSBX[i].fn, i, KUSB_FNID_##fn); \
} while (0)
#define NativeWinUSBOnly_Set(fn) \
do { \
if (native_winusb) \
WinUSBX[i].fn = (WinUsb_##fn##_t)GetProcAddress(h, "WinUsb_" #fn); \
else \
WinUSBX[i].fn = NULL; \
} while (0)
static int winusbx_init(struct libusb_context *ctx)
{
HMODULE h;
bool native_winusb;
int i;
KLIB_VERSION LibK_Version;
LibK_GetProcAddress_t pLibK_GetProcAddress = NULL;
LibK_GetVersion_t pLibK_GetVersion;
h = LoadLibraryA("libusbK");
if (h == NULL) {
usbi_info(ctx, "libusbK DLL is not available, will use native WinUSB");
h = LoadLibraryA("WinUSB");
if (h == NULL) {
usbi_warn(ctx, "WinUSB DLL is not available either, "
"you will not be able to access devices outside of enumeration");
return LIBUSB_ERROR_NOT_FOUND;
}
} else {
usbi_dbg("using libusbK DLL for universal access");
pLibK_GetVersion = (LibK_GetVersion_t)GetProcAddress(h, "LibK_GetVersion");
if (pLibK_GetVersion != NULL) {
pLibK_GetVersion(&LibK_Version);
usbi_dbg("libusbK version: %d.%d.%d.%d", LibK_Version.Major, LibK_Version.Minor,
LibK_Version.Micro, LibK_Version.Nano);
}
pLibK_GetProcAddress = (LibK_GetProcAddress_t)GetProcAddress(h, "LibK_GetProcAddress");
if (pLibK_GetProcAddress == NULL) {
usbi_err(ctx, "LibK_GetProcAddress() not found in libusbK DLL");
FreeLibrary(h);
return LIBUSB_ERROR_NOT_FOUND;
}
}
native_winusb = (pLibK_GetProcAddress == NULL);
for (i = 0; i < SUB_API_MAX; i++) {
WinUSBX_Set(AbortPipe);
WinUSBX_Set(ControlTransfer);
WinUSBX_Set(FlushPipe);
WinUSBX_Set(Free);
WinUSBX_Set(GetAssociatedInterface);
WinUSBX_Set(Initialize);
WinUSBX_Set(ReadPipe);
if (!native_winusb)
WinUSBX_Set(ResetDevice);
WinUSBX_Set(ResetPipe);
WinUSBX_Set(SetCurrentAlternateSetting);
WinUSBX_Set(SetPipePolicy);
WinUSBX_Set(WritePipe);
WinUSBX_Set(IsoReadPipe);
WinUSBX_Set(IsoWritePipe);
NativeWinUSBOnly_Set(RegisterIsochBuffer);
NativeWinUSBOnly_Set(UnregisterIsochBuffer);
NativeWinUSBOnly_Set(WriteIsochPipeAsap);
NativeWinUSBOnly_Set(ReadIsochPipeAsap);
NativeWinUSBOnly_Set(QueryPipeEx);
if (WinUSBX[i].Initialize != NULL) {
WinUSBX[i].initialized = true;
// Assume driver supports CancelIoEx() if it is available
WinUSBX[i].CancelIoEx_supported = (pCancelIoEx != NULL);
usbi_dbg("initalized sub API %s", winusbx_driver_names[i]);
} else {
usbi_warn(ctx, "Failed to initalize sub API %s", winusbx_driver_names[i]);
WinUSBX[i].initialized = false;
}
}
WinUSBX_handle = h;
return LIBUSB_SUCCESS;
}
static void winusbx_exit(void)
{
if (WinUSBX_handle != NULL) {
FreeLibrary(WinUSBX_handle);
WinUSBX_handle = NULL;
/* Reset the WinUSBX API structures */
memset(&WinUSBX, 0, sizeof(WinUSBX));
}
}
// NB: open and close must ensure that they only handle interface of
// the right API type, as these functions can be called wholesale from
// composite_open(), with interfaces belonging to different APIs
static int winusbx_open(int sub_api, struct libusb_device_handle *dev_handle)
{
struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
HANDLE file_handle;
int i;
CHECK_WINUSBX_AVAILABLE(sub_api);
// WinUSB requires a separate handle for each interface
for (i = 0; i < USB_MAXINTERFACES; i++) {
if ((priv->usb_interface[i].path != NULL)
&& (priv->usb_interface[i].apib->id == USB_API_WINUSBX)) {
file_handle = CreateFileA(priv->usb_interface[i].path, GENERIC_WRITE | GENERIC_READ, FILE_SHARE_WRITE | FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);
if (file_handle == INVALID_HANDLE_VALUE) {
usbi_err(ctx, "could not open device %s (interface %d): %s", priv->usb_interface[i].path, i, windows_error_str(0));
switch (GetLastError()) {
case ERROR_FILE_NOT_FOUND: // The device was disconnected
return LIBUSB_ERROR_NO_DEVICE;
case ERROR_ACCESS_DENIED:
return LIBUSB_ERROR_ACCESS;
default:
return LIBUSB_ERROR_IO;
}
}
handle_priv->interface_handle[i].dev_handle = file_handle;
}
}
return LIBUSB_SUCCESS;
}
static void winusbx_close(int sub_api, struct libusb_device_handle *dev_handle)
{
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
HANDLE handle;
int i;
if (sub_api == SUB_API_NOTSET)
sub_api = priv->sub_api;
if (!WinUSBX[sub_api].initialized)
return;
if (priv->apib->id == USB_API_COMPOSITE) {
// If this is a composite device, just free and close all WinUSB-like
// interfaces directly (each is independent and not associated with another)
for (i = 0; i < USB_MAXINTERFACES; i++) {
if (priv->usb_interface[i].apib->id == USB_API_WINUSBX) {
handle = handle_priv->interface_handle[i].api_handle;
if (HANDLE_VALID(handle))
WinUSBX[sub_api].Free(handle);
handle = handle_priv->interface_handle[i].dev_handle;
if (HANDLE_VALID(handle))
CloseHandle(handle);
}
}
} else {
// If this is a WinUSB device, free all interfaces above interface 0,
// then free and close interface 0 last
for (i = 1; i < USB_MAXINTERFACES; i++) {
handle = handle_priv->interface_handle[i].api_handle;
if (HANDLE_VALID(handle))
WinUSBX[sub_api].Free(handle);
}
handle = handle_priv->interface_handle[0].api_handle;
if (HANDLE_VALID(handle))
WinUSBX[sub_api].Free(handle);
handle = handle_priv->interface_handle[0].dev_handle;
if (HANDLE_VALID(handle))
CloseHandle(handle);
}
}
static int winusbx_configure_endpoints(int sub_api, struct libusb_device_handle *dev_handle, int iface)
{
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
HANDLE winusb_handle = handle_priv->interface_handle[iface].api_handle;
UCHAR policy;
ULONG timeout = 0;
uint8_t endpoint_address;
int i;
CHECK_WINUSBX_AVAILABLE(sub_api);
// With handle and enpoints set (in parent), we can setup the default pipe properties
// see http://download.microsoft.com/download/D/1/D/D1DD7745-426B-4CC3-A269-ABBBE427C0EF/DVC-T705_DDC08.pptx
for (i = -1; i < priv->usb_interface[iface].nb_endpoints; i++) {
endpoint_address = (i == -1) ? 0 : priv->usb_interface[iface].endpoint[i];
if (!WinUSBX[sub_api].SetPipePolicy(winusb_handle, endpoint_address,
PIPE_TRANSFER_TIMEOUT, sizeof(ULONG), &timeout))
usbi_dbg("failed to set PIPE_TRANSFER_TIMEOUT for control endpoint %02X", endpoint_address);
if ((i == -1) || (sub_api == SUB_API_LIBUSB0))
continue; // Other policies don't apply to control endpoint or libusb0
policy = false;
if (!WinUSBX[sub_api].SetPipePolicy(winusb_handle, endpoint_address,
SHORT_PACKET_TERMINATE, sizeof(UCHAR), &policy))
usbi_dbg("failed to disable SHORT_PACKET_TERMINATE for endpoint %02X", endpoint_address);
if (!WinUSBX[sub_api].SetPipePolicy(winusb_handle, endpoint_address,
IGNORE_SHORT_PACKETS, sizeof(UCHAR), &policy))
usbi_dbg("failed to disable IGNORE_SHORT_PACKETS for endpoint %02X", endpoint_address);
policy = true;
/* ALLOW_PARTIAL_READS must be enabled due to likely libusbK bug. See:
https://sourceforge.net/mailarchive/message.php?msg_id=29736015 */
if (!WinUSBX[sub_api].SetPipePolicy(winusb_handle, endpoint_address,
ALLOW_PARTIAL_READS, sizeof(UCHAR), &policy))
usbi_dbg("failed to enable ALLOW_PARTIAL_READS for endpoint %02X", endpoint_address);
if (!WinUSBX[sub_api].SetPipePolicy(winusb_handle, endpoint_address,
AUTO_CLEAR_STALL, sizeof(UCHAR), &policy))
usbi_dbg("failed to enable AUTO_CLEAR_STALL for endpoint %02X", endpoint_address);
if (sub_api == SUB_API_LIBUSBK) {
if (!WinUSBX[sub_api].SetPipePolicy(winusb_handle, endpoint_address,
ISO_ALWAYS_START_ASAP, sizeof(UCHAR), &policy))
usbi_dbg("failed to enable ISO_ALWAYS_START_ASAP for endpoint %02X", endpoint_address);
}
}
return LIBUSB_SUCCESS;
}
static int winusbx_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface)
{
struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
bool is_using_usbccgp = (priv->apib->id == USB_API_COMPOSITE);
SP_DEVICE_INTERFACE_DETAIL_DATA_A *dev_interface_details = NULL;
HDEVINFO dev_info = INVALID_HANDLE_VALUE;
SP_DEVINFO_DATA dev_info_data;
char *dev_path_no_guid = NULL;
char filter_path[] = "\\\\.\\libusb0-0000";
bool found_filter = false;
HANDLE file_handle, winusb_handle;
DWORD err;
int i;
CHECK_WINUSBX_AVAILABLE(sub_api);
// If the device is composite, but using the default Windows composite parent driver (usbccgp)
// or if it's the first WinUSB-like interface, we get a handle through Initialize().
if ((is_using_usbccgp) || (iface == 0)) {
// composite device (independent interfaces) or interface 0
file_handle = handle_priv->interface_handle[iface].dev_handle;
if (!HANDLE_VALID(file_handle))
return LIBUSB_ERROR_NOT_FOUND;
if (!WinUSBX[sub_api].Initialize(file_handle, &winusb_handle)) {
handle_priv->interface_handle[iface].api_handle = INVALID_HANDLE_VALUE;
err = GetLastError();
switch (err) {
case ERROR_BAD_COMMAND:
// The device was disconnected
usbi_err(ctx, "could not access interface %d: %s", iface, windows_error_str(0));
return LIBUSB_ERROR_NO_DEVICE;
default:
// it may be that we're using the libusb0 filter driver.
// TODO: can we move this whole business into the K/0 DLL?
for (i = 0; ; i++) {
safe_free(dev_interface_details);
safe_free(dev_path_no_guid);
dev_interface_details = get_interface_details_filter(ctx, &dev_info, &dev_info_data, &GUID_DEVINTERFACE_LIBUSB0_FILTER, i, filter_path);
if ((found_filter) || (dev_interface_details == NULL))
break;
// ignore GUID part
dev_path_no_guid = sanitize_path(strtok(dev_interface_details->DevicePath, "{"));
if (dev_path_no_guid == NULL)
continue;
if (strncmp(dev_path_no_guid, priv->usb_interface[iface].path, strlen(dev_path_no_guid)) == 0) {
file_handle = CreateFileA(filter_path, GENERIC_WRITE | GENERIC_READ, FILE_SHARE_WRITE | FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);
if (file_handle != INVALID_HANDLE_VALUE) {
if (WinUSBX[sub_api].Initialize(file_handle, &winusb_handle)) {
// Replace the existing file handle with the working one
CloseHandle(handle_priv->interface_handle[iface].dev_handle);
handle_priv->interface_handle[iface].dev_handle = file_handle;
found_filter = true;
} else {
usbi_err(ctx, "could not initialize filter driver for %s", filter_path);
CloseHandle(file_handle);
}
} else {
usbi_err(ctx, "could not open device %s: %s", filter_path, windows_error_str(0));
}
}
}
free(dev_interface_details);
if (!found_filter) {
usbi_err(ctx, "could not access interface %d: %s", iface, windows_error_str(err));
return LIBUSB_ERROR_ACCESS;
}
}
}
handle_priv->interface_handle[iface].api_handle = winusb_handle;
} else {
// For all other interfaces, use GetAssociatedInterface()
winusb_handle = handle_priv->interface_handle[0].api_handle;
// It is a requirement for multiple interface devices on Windows that, to you
// must first claim the first interface before you claim the others
if (!HANDLE_VALID(winusb_handle)) {
file_handle = handle_priv->interface_handle[0].dev_handle;
if (WinUSBX[sub_api].Initialize(file_handle, &winusb_handle)) {
handle_priv->interface_handle[0].api_handle = winusb_handle;
usbi_warn(ctx, "auto-claimed interface 0 (required to claim %d with WinUSB)", iface);
} else {
usbi_warn(ctx, "failed to auto-claim interface 0 (required to claim %d with WinUSB): %s", iface, windows_error_str(0));
return LIBUSB_ERROR_ACCESS;
}
}
if (!WinUSBX[sub_api].GetAssociatedInterface(winusb_handle, (UCHAR)(iface - 1),
&handle_priv->interface_handle[iface].api_handle)) {
handle_priv->interface_handle[iface].api_handle = INVALID_HANDLE_VALUE;
switch (GetLastError()) {
case ERROR_NO_MORE_ITEMS: // invalid iface
return LIBUSB_ERROR_NOT_FOUND;
case ERROR_BAD_COMMAND: // The device was disconnected
return LIBUSB_ERROR_NO_DEVICE;
case ERROR_ALREADY_EXISTS: // already claimed
return LIBUSB_ERROR_BUSY;
default:
usbi_err(ctx, "could not claim interface %d: %s", iface, windows_error_str(0));
return LIBUSB_ERROR_ACCESS;
}
}
handle_priv->interface_handle[iface].dev_handle = handle_priv->interface_handle[0].dev_handle;
}
usbi_dbg("claimed interface %d", iface);
handle_priv->active_interface = iface;
return LIBUSB_SUCCESS;
}
static int winusbx_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface)
{
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
HANDLE winusb_handle;
CHECK_WINUSBX_AVAILABLE(sub_api);
winusb_handle = handle_priv->interface_handle[iface].api_handle;
if (!HANDLE_VALID(winusb_handle))
return LIBUSB_ERROR_NOT_FOUND;
WinUSBX[sub_api].Free(winusb_handle);
handle_priv->interface_handle[iface].api_handle = INVALID_HANDLE_VALUE;
return LIBUSB_SUCCESS;
}
/*
* Return the first valid interface (of the same API type), for control transfers
*/
static int get_valid_interface(struct libusb_device_handle *dev_handle, int api_id)
{
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
int i;
if ((api_id < USB_API_WINUSBX) || (api_id > USB_API_HID)) {
usbi_dbg("unsupported API ID");
return -1;
}
for (i = 0; i < USB_MAXINTERFACES; i++) {
if (HANDLE_VALID(handle_priv->interface_handle[i].dev_handle)
&& HANDLE_VALID(handle_priv->interface_handle[i].api_handle)
&& (priv->usb_interface[i].apib->id == api_id))
return i;
}
return -1;
}
/*
* Check a specific interface is valid (of the same API type), for control transfers
*/
static int check_valid_interface(struct libusb_device_handle *dev_handle, unsigned short interface, int api_id)
{
if (interface >= USB_MAXINTERFACES)
return -1;
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
if ((api_id < USB_API_WINUSBX) || (api_id > USB_API_HID)) {
usbi_dbg("unsupported API ID");
return -1;
}
// try the requested interface
if (HANDLE_VALID(handle_priv->interface_handle[interface].dev_handle)
&& HANDLE_VALID(handle_priv->interface_handle[interface].api_handle)
&& (priv->usb_interface[interface].apib->id == api_id))
return interface;
return -1;
}
/*
* Lookup interface by endpoint address. -1 if not found
*/
static int interface_by_endpoint(struct winusb_device_priv *priv,
struct winusb_device_handle_priv *handle_priv, uint8_t endpoint_address)
{
int i, j;
for (i = 0; i < USB_MAXINTERFACES; i++) {
if (!HANDLE_VALID(handle_priv->interface_handle[i].api_handle))
continue;
if (priv->usb_interface[i].endpoint == NULL)
continue;
for (j = 0; j < priv->usb_interface[i].nb_endpoints; j++) {
if (priv->usb_interface[i].endpoint[j] == endpoint_address)
return i;
}
}
return -1;
}
static int winusbx_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle);
PWINUSB_SETUP_PACKET setup = (PWINUSB_SETUP_PACKET)transfer->buffer;
ULONG size;
HANDLE winusb_handle;
OVERLAPPED *overlapped;
int current_interface;
CHECK_WINUSBX_AVAILABLE(sub_api);
size = transfer->length - LIBUSB_CONTROL_SETUP_SIZE;
// Windows places upper limits on the control transfer size
// See: https://msdn.microsoft.com/en-us/library/windows/hardware/ff538112.aspx
if (size > MAX_CTRL_BUFFER_LENGTH)
return LIBUSB_ERROR_INVALID_PARAM;
if ((setup->RequestType & 0x1F) == LIBUSB_RECIPIENT_INTERFACE)
current_interface = check_valid_interface(transfer->dev_handle, setup->Index & 0xff, USB_API_WINUSBX);
else
current_interface = get_valid_interface(transfer->dev_handle, USB_API_WINUSBX);
if (current_interface < 0) {
if (auto_claim(transfer, &current_interface, USB_API_WINUSBX) != LIBUSB_SUCCESS)
return LIBUSB_ERROR_NOT_FOUND;
}
usbi_dbg("will use interface %d", current_interface);
transfer_priv->handle = winusb_handle = handle_priv->interface_handle[current_interface].api_handle;
overlapped = transfer_priv->pollable_fd.overlapped;
// Sending of set configuration control requests from WinUSB creates issues, except when using libusb0.sys
if (sub_api != SUB_API_LIBUSB0
&& (LIBUSB_REQ_TYPE(setup->RequestType) == LIBUSB_REQUEST_TYPE_STANDARD)
&& (setup->Request == LIBUSB_REQUEST_SET_CONFIGURATION)) {
if (setup->Value != priv->active_config) {
usbi_warn(ctx, "cannot set configuration other than the default one");
return LIBUSB_ERROR_INVALID_PARAM;
}
windows_force_sync_completion(overlapped, 0);
} else {
if (!WinUSBX[sub_api].ControlTransfer(winusb_handle, *setup, transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE, size, NULL, overlapped)) {
if (GetLastError() != ERROR_IO_PENDING) {
usbi_warn(ctx, "ControlTransfer failed: %s", windows_error_str(0));
return LIBUSB_ERROR_IO;
}
} else {
windows_force_sync_completion(overlapped, size);
}
}
transfer_priv->interface_number = (uint8_t)current_interface;
return LIBUSB_SUCCESS;
}
static int winusbx_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting)
{
struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
HANDLE winusb_handle;
CHECK_WINUSBX_AVAILABLE(sub_api);
if (altsetting > 255)
return LIBUSB_ERROR_INVALID_PARAM;
winusb_handle = handle_priv->interface_handle[iface].api_handle;
if (!HANDLE_VALID(winusb_handle)) {
usbi_err(ctx, "interface must be claimed first");
return LIBUSB_ERROR_NOT_FOUND;
}
if (!WinUSBX[sub_api].SetCurrentAlternateSetting(winusb_handle, (UCHAR)altsetting)) {
usbi_err(ctx, "SetCurrentAlternateSetting failed: %s", windows_error_str(0));
return LIBUSB_ERROR_IO;
}
return LIBUSB_SUCCESS;
}
static enum libusb_transfer_status usbd_status_to_libusb_transfer_status(USBD_STATUS status)
{
/* Based on https://msdn.microsoft.com/en-us/library/windows/hardware/ff539136(v=vs.85).aspx :
* USBD_STATUS have the most significant 4 bits indicating overall status and the rest gives the details. */
switch (status >> 28) {
case 0x00: /* USBD_STATUS_SUCCESS */
return LIBUSB_TRANSFER_COMPLETED;
case 0x01: /* USBD_STATUS_PENDING */
return LIBUSB_TRANSFER_COMPLETED;
default: /* USBD_STATUS_ERROR */
switch (status & 0x0fffffff) {
case 0xC0006000: /* USBD_STATUS_TIMEOUT */
return LIBUSB_TRANSFER_TIMED_OUT;
case 0xC0010000: /* USBD_STATUS_CANCELED */
return LIBUSB_TRANSFER_CANCELLED;
case 0xC0000030: /* USBD_STATUS_ENDPOINT_HALTED */
return LIBUSB_TRANSFER_STALL;
case 0xC0007000: /* USBD_STATUS_DEVICE_GONE */
return LIBUSB_TRANSFER_NO_DEVICE;
default:
usbi_dbg("USBD_STATUS 0x%08x translated to LIBUSB_TRANSFER_ERROR", status);
return LIBUSB_TRANSFER_ERROR;
}
}
}
static void WINAPI winusbx_native_iso_transfer_continue_stream_callback(struct libusb_transfer *transfer)
{
// If this callback is invoked, this means that we attempted to set ContinueStream
// to TRUE when calling Read/WriteIsochPipeAsap in winusbx_do_iso_transfer.
// The role of this callback is to fallback to ContinueStream = FALSE if the transfer
// did not succeed.
struct winusb_transfer_priv *transfer_priv = (struct winusb_transfer_priv *)
usbi_transfer_get_os_priv(LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer));
BOOL fallback = (transfer->status != LIBUSB_TRANSFER_COMPLETED);
int idx;
// Restore the user callback
transfer->callback = transfer_priv->iso_user_callback;
for (idx = 0; idx < transfer->num_iso_packets && !fallback; ++idx) {
if (transfer->iso_packet_desc[idx].status != LIBUSB_TRANSFER_COMPLETED) {
fallback = TRUE;
}
}
if (!fallback) {
// If the transfer was successful, we restore the user callback and call it.
if (transfer->callback) {
transfer->callback(transfer);
}
}
else {
// If the transfer wasn't successful we reschedule the transfer while forcing it
// not to continue the stream. This might results in a 5-ms delay.
transfer_priv->iso_break_stream = TRUE;
libusb_submit_transfer(transfer);
}
}
static int winusbx_submit_iso_transfer(int sub_api, struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
HANDLE winusb_handle;
OVERLAPPED *overlapped;
bool ret;
int current_interface;
CHECK_WINUSBX_AVAILABLE(sub_api);
current_interface = interface_by_endpoint(priv, handle_priv, transfer->endpoint);
if (current_interface < 0) {
usbi_err(ctx, "unable to match endpoint to an open interface - cancelling transfer");
return LIBUSB_ERROR_NOT_FOUND;
} else {
usbi_dbg("matched endpoint %02X with interface %d", transfer->endpoint, current_interface);
}
transfer_priv->handle = winusb_handle = handle_priv->interface_handle[current_interface].api_handle;
overlapped = transfer_priv->pollable_fd.overlapped;
if ((sub_api == SUB_API_LIBUSBK) || (sub_api == SUB_API_LIBUSB0)) {
int i;
UINT offset;
size_t iso_ctx_size;
PKISO_CONTEXT iso_context;
iso_ctx_size = sizeof(KISO_CONTEXT) + (transfer->num_iso_packets * sizeof(KISO_PACKET));
transfer_priv->iso_context = iso_context = calloc(1, iso_ctx_size);
if (transfer_priv->iso_context == NULL)
return LIBUSB_ERROR_NO_MEM;
// start ASAP
iso_context->StartFrame = 0;
iso_context->NumberOfPackets = (SHORT)transfer->num_iso_packets;
// convert the transfer packet lengths to iso_packet offsets
offset = 0;
for (i = 0; i < transfer->num_iso_packets; i++) {
iso_context->IsoPackets[i].offset = offset;
offset += transfer->iso_packet_desc[i].length;
}
if (IS_XFERIN(transfer)) {
usbi_dbg("reading %d iso packets", transfer->num_iso_packets);
ret = WinUSBX[sub_api].IsoReadPipe(winusb_handle, transfer->endpoint, transfer->buffer, transfer->length, overlapped, iso_context);
} else {
usbi_dbg("writing %d iso packets", transfer->num_iso_packets);
ret = WinUSBX[sub_api].IsoWritePipe(winusb_handle, transfer->endpoint, transfer->buffer, transfer->length, overlapped, iso_context);
}
if (!ret) {
if (GetLastError() != ERROR_IO_PENDING) {
usbi_err(ctx, "IsoReadPipe/IsoWritePipe failed: %s", windows_error_str(0));
return LIBUSB_ERROR_IO;
}
} else {
windows_force_sync_completion(overlapped, (ULONG)transfer->length);
}
transfer_priv->interface_number = (uint8_t)current_interface;
return LIBUSB_SUCCESS;
}
else if (sub_api == SUB_API_WINUSB) {
WINUSB_PIPE_INFORMATION_EX pipe_info_ex = { 0 };
WINUSB_ISOCH_BUFFER_HANDLE buffer_handle;
ULONG iso_transfer_size_multiple;
int out_transfer_length = 0;
int idx;
# define WINUSBX_CHECK_API_SUPPORTED(API) \
if (WinUSBX[sub_api].API == NULL) \
{ \
usbi_dbg(#API " isn't available"); \
return LIBUSB_ERROR_NOT_SUPPORTED; \
}
// Depending on the version of Microsoft WinUSB, isochronous transfers may not be supported.
WINUSBX_CHECK_API_SUPPORTED(RegisterIsochBuffer);
WINUSBX_CHECK_API_SUPPORTED(ReadIsochPipeAsap);
WINUSBX_CHECK_API_SUPPORTED(WriteIsochPipeAsap);
WINUSBX_CHECK_API_SUPPORTED(UnregisterIsochBuffer);
WINUSBX_CHECK_API_SUPPORTED(QueryPipeEx);
if (sizeof(struct libusb_iso_packet_descriptor) != sizeof(USBD_ISO_PACKET_DESCRIPTOR)) {
usbi_dbg("The size of Microsoft WinUsb and libusb isochronous packet descriptor doesn't match.");
return LIBUSB_ERROR_NOT_SUPPORTED;
}
// Query the pipe extended information to find the pipe index corresponding to the endpoint.
for (idx = 0; idx < priv->usb_interface[current_interface].nb_endpoints; ++idx) {
ret = WinUSBX[sub_api].QueryPipeEx(winusb_handle, (UINT8)priv->usb_interface[current_interface].current_altsetting, (UCHAR)idx, &pipe_info_ex);
if (!ret) {
usbi_dbg("Couldn't query interface settings for USB pipe with index %d. Error: %s", idx, windows_error_str(0));
return LIBUSB_ERROR_NOT_FOUND;
}
if (pipe_info_ex.PipeId == transfer->endpoint && pipe_info_ex.PipeType == UsbdPipeTypeIsochronous) {
break;
}
}
// Make sure we found the index.
if (idx >= priv->usb_interface[current_interface].nb_endpoints) {
usbi_dbg("Couldn't find the isochronous endpoint %02x.", transfer->endpoint);
return LIBUSB_ERROR_NOT_FOUND;
}
if (IS_XFERIN(transfer)) {
int interval = pipe_info_ex.Interval;
// For high-speed and SuperSpeed device, the interval is 2**(bInterval-1).
if (libusb_get_device_speed(libusb_get_device(transfer->dev_handle)) >= LIBUSB_SPEED_HIGH) {
interval = (1 << (pipe_info_ex.Interval - 1));
}
// WinUSB only supports isochronous transfers spanning a full USB frames. Later, we might be smarter about this
// and allocate a temporary buffer. However, this is harder than it seems as its destruction would depend on overlapped
// IO...
iso_transfer_size_multiple = (pipe_info_ex.MaximumBytesPerInterval * 8) / interval;
if (transfer->length % iso_transfer_size_multiple != 0) {
usbi_dbg("The length of isochronous buffer must be a multiple of the MaximumBytesPerInterval * 8 / Interval");
return LIBUSB_ERROR_INVALID_PARAM;
}
}
else {
// If this is an OUT transfer, we make sure the isochronous packets are contiguous as this isn't supported otherwise.
BOOL size_should_be_zero = FALSE;
out_transfer_length = 0;
for (idx = 0; idx < transfer->num_iso_packets; ++idx) {
if ((size_should_be_zero && transfer->iso_packet_desc[idx].length != 0) ||
(transfer->iso_packet_desc[idx].length != pipe_info_ex.MaximumBytesPerInterval && idx + 1 < transfer->num_iso_packets && transfer->iso_packet_desc[idx + 1].length > 0)) {
usbi_dbg("Isochronous packets for OUT transfer with Microsoft WinUSB must be contiguous in memory.");
return LIBUSB_ERROR_INVALID_PARAM;
}
size_should_be_zero = (transfer->iso_packet_desc[idx].length == 0);
out_transfer_length += transfer->iso_packet_desc[idx].length;
}
}
if (transfer_priv->isoch_buffer_handle != NULL) {
if (WinUSBX[sub_api].UnregisterIsochBuffer(transfer_priv->isoch_buffer_handle)) {
transfer_priv->isoch_buffer_handle = NULL;
} else {
usbi_dbg("Couldn't unregister the Microsoft WinUSB isochronous buffer: %s", windows_error_str(0));
return LIBUSB_ERROR_OTHER;
}
}
// Register the isochronous buffer to the operating system.
ret = WinUSBX[sub_api].RegisterIsochBuffer(winusb_handle, transfer->endpoint, transfer->buffer, transfer->length, &buffer_handle);
if (!ret) {
usbi_dbg("Microsoft WinUSB refused to allocate an isochronous buffer.");
return LIBUSB_ERROR_NO_MEM;
}
// Important note: the WinUSB_Read/WriteIsochPipeAsap API requires a ContinueStream parameter that tells whether the isochronous
// stream must be continued or if the WinUSB driver can schedule the transfer at its conveniance. Profiling subsequent transfers
// with ContinueStream = FALSE showed that 5 frames, i.e. about 5 milliseconds, were left empty between each transfer. This
// is critical as this greatly diminish the achievable isochronous bandwidth. We solved the problem using the following strategy:
// - Transfers are first scheduled with ContinueStream = TRUE and with winusbx_iso_transfer_continue_stream_callback as user callback.
// - If the transfer succeeds, winusbx_iso_transfer_continue_stream_callback restore the user callback and calls its.
// - If the transfer fails, winusbx_iso_transfer_continue_stream_callback reschedule the transfer and force ContinueStream = FALSE.
if (!transfer_priv->iso_break_stream) {
transfer_priv->iso_user_callback = transfer->callback;
transfer->callback = winusbx_native_iso_transfer_continue_stream_callback;
}
// Initiate the transfers.
if (IS_XFERIN(transfer)) {
ret = WinUSBX[sub_api].ReadIsochPipeAsap(buffer_handle, 0, transfer->length, !transfer_priv->iso_break_stream, transfer->num_iso_packets, (PUSBD_ISO_PACKET_DESCRIPTOR)transfer->iso_packet_desc, overlapped);
}
else {
ret = WinUSBX[sub_api].WriteIsochPipeAsap(buffer_handle, 0, out_transfer_length, !transfer_priv->iso_break_stream, overlapped);
}
// Restore the ContinueStream parameter to TRUE.
transfer_priv->iso_break_stream = FALSE;
if (!ret) {
if (GetLastError() == ERROR_IO_PENDING) {
transfer_priv->isoch_buffer_handle = buffer_handle;
} else {
usbi_err(ctx, "ReadIsochPipeAsap/WriteIsochPipeAsap failed: %s", windows_error_str(0));
if (WinUSBX[sub_api].UnregisterIsochBuffer(buffer_handle)) {
transfer_priv->isoch_buffer_handle = NULL;
return LIBUSB_ERROR_IO;
} else {
usbi_dbg("Couldn't unregister the Microsoft WinUSB isochronous buffer: %s", windows_error_str(0));
return LIBUSB_ERROR_OTHER;
}
}
} else {
windows_force_sync_completion(overlapped, (ULONG)transfer->length);
if (!WinUSBX[sub_api].UnregisterIsochBuffer(buffer_handle)) {
usbi_dbg("Couldn't unregister the Microsoft WinUSB isochronous buffer: %s", windows_error_str(0));
return LIBUSB_ERROR_OTHER;
}
}
transfer_priv->interface_number = (uint8_t)current_interface;
return LIBUSB_SUCCESS;
} else {
PRINT_UNSUPPORTED_API(winusbx_submit_iso_transfer);
return LIBUSB_ERROR_NOT_SUPPORTED;
}
}
static int winusbx_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
HANDLE winusb_handle;
OVERLAPPED *overlapped;
bool ret;
int current_interface;
CHECK_WINUSBX_AVAILABLE(sub_api);
current_interface = interface_by_endpoint(priv, handle_priv, transfer->endpoint);
if (current_interface < 0) {
usbi_err(ctx, "unable to match endpoint to an open interface - cancelling transfer");
return LIBUSB_ERROR_NOT_FOUND;
}
usbi_dbg("matched endpoint %02X with interface %d", transfer->endpoint, current_interface);
transfer_priv->handle = winusb_handle = handle_priv->interface_handle[current_interface].api_handle;
overlapped = transfer_priv->pollable_fd.overlapped;
if (IS_XFERIN(transfer)) {
usbi_dbg("reading %d bytes", transfer->length);
ret = WinUSBX[sub_api].ReadPipe(winusb_handle, transfer->endpoint, transfer->buffer, transfer->length, NULL, overlapped);
} else {
usbi_dbg("writing %d bytes", transfer->length);
ret = WinUSBX[sub_api].WritePipe(winusb_handle, transfer->endpoint, transfer->buffer, transfer->length, NULL, overlapped);
}
if (!ret) {
if (GetLastError() != ERROR_IO_PENDING) {
usbi_err(ctx, "ReadPipe/WritePipe failed: %s", windows_error_str(0));
return LIBUSB_ERROR_IO;
}
} else {
windows_force_sync_completion(overlapped, (ULONG)transfer->length);
}
transfer_priv->interface_number = (uint8_t)current_interface;
return LIBUSB_SUCCESS;
}
static int winusbx_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint)
{
struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
HANDLE winusb_handle;
int current_interface;
CHECK_WINUSBX_AVAILABLE(sub_api);
current_interface = interface_by_endpoint(priv, handle_priv, endpoint);
if (current_interface < 0) {
usbi_err(ctx, "unable to match endpoint to an open interface - cannot clear");
return LIBUSB_ERROR_NOT_FOUND;
}
usbi_dbg("matched endpoint %02X with interface %d", endpoint, current_interface);
winusb_handle = handle_priv->interface_handle[current_interface].api_handle;
if (!WinUSBX[sub_api].ResetPipe(winusb_handle, endpoint)) {
usbi_err(ctx, "ResetPipe failed: %s", windows_error_str(0));
return LIBUSB_ERROR_NO_DEVICE;
}
return LIBUSB_SUCCESS;
}
/*
* from http://www.winvistatips.com/winusb-bugchecks-t335323.html (confirmed
* through testing as well):
* "You can not call WinUsb_AbortPipe on control pipe. You can possibly cancel
* the control transfer using CancelIo"
*/
static int winusbx_abort_control(int sub_api, struct usbi_transfer *itransfer)
{
// Cancelling of the I/O is done in the parent
return LIBUSB_SUCCESS;
}
static int winusbx_abort_transfers(int sub_api, struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
HANDLE handle;
int current_interface;
CHECK_WINUSBX_AVAILABLE(sub_api);
current_interface = transfer_priv->interface_number;
if ((current_interface < 0) || (current_interface >= USB_MAXINTERFACES)) {
usbi_err(ctx, "program assertion failed: invalid interface_number");
return LIBUSB_ERROR_NOT_FOUND;
}
usbi_dbg("will use interface %d", current_interface);
if (WinUSBX[sub_api].CancelIoEx_supported) {
// Try to use CancelIoEx if available to cancel just a single transfer
handle = handle_priv->interface_handle[current_interface].dev_handle;
if (pCancelIoEx(handle, transfer_priv->pollable_fd.overlapped))
return LIBUSB_SUCCESS;
else if (GetLastError() == ERROR_NOT_FOUND)
return LIBUSB_ERROR_NOT_FOUND;
// Not every driver implements the necessary functionality for CancelIoEx
usbi_warn(ctx, "CancelIoEx not supported for sub API %s", winusbx_driver_names[sub_api]);
WinUSBX[sub_api].CancelIoEx_supported = false;
}
handle = handle_priv->interface_handle[current_interface].api_handle;
if (!WinUSBX[sub_api].AbortPipe(handle, transfer->endpoint)) {
usbi_err(ctx, "AbortPipe failed: %s", windows_error_str(0));
return LIBUSB_ERROR_NO_DEVICE;
}
return LIBUSB_SUCCESS;
}
/*
* from the "How to Use WinUSB to Communicate with a USB Device" Microsoft white paper
* (http://www.microsoft.com/whdc/connect/usb/winusb_howto.mspx):
* "WinUSB does not support host-initiated reset port and cycle port operations" and
* IOCTL_INTERNAL_USB_CYCLE_PORT is only available in kernel mode and the
* IOCTL_USB_HUB_CYCLE_PORT ioctl was removed from Vista => the best we can do is
* cycle the pipes (and even then, the control pipe can not be reset using WinUSB)
*/
// TODO: (post hotplug): see if we can force eject the device and redetect it (reuse hotplug?)
static int winusbx_reset_device(int sub_api, struct libusb_device_handle *dev_handle)
{
struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
HANDLE winusb_handle;
int i, j;
CHECK_WINUSBX_AVAILABLE(sub_api);
// Reset any available pipe (except control)
for (i = 0; i < USB_MAXINTERFACES; i++) {
winusb_handle = handle_priv->interface_handle[i].api_handle;
if (HANDLE_VALID(winusb_handle)) {
for (j = 0; j < priv->usb_interface[i].nb_endpoints; j++) {
usbi_dbg("resetting ep %02X", priv->usb_interface[i].endpoint[j]);
if (!WinUSBX[sub_api].AbortPipe(winusb_handle, priv->usb_interface[i].endpoint[j]))
usbi_err(ctx, "AbortPipe (pipe address %02X) failed: %s",
priv->usb_interface[i].endpoint[j], windows_error_str(0));
// FlushPipe seems to fail on OUT pipes
if (IS_EPIN(priv->usb_interface[i].endpoint[j])
&& (!WinUSBX[sub_api].FlushPipe(winusb_handle, priv->usb_interface[i].endpoint[j])))
usbi_err(ctx, "FlushPipe (pipe address %02X) failed: %s",
priv->usb_interface[i].endpoint[j], windows_error_str(0));
if (!WinUSBX[sub_api].ResetPipe(winusb_handle, priv->usb_interface[i].endpoint[j]))
usbi_err(ctx, "ResetPipe (pipe address %02X) failed: %s",
priv->usb_interface[i].endpoint[j], windows_error_str(0));
}
}
}
// libusbK & libusb0 have the ability to issue an actual device reset
if (WinUSBX[sub_api].ResetDevice != NULL) {
winusb_handle = handle_priv->interface_handle[0].api_handle;
if (HANDLE_VALID(winusb_handle))
WinUSBX[sub_api].ResetDevice(winusb_handle);
}
return LIBUSB_SUCCESS;
}
static int winusbx_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
PKISO_CONTEXT iso_context;
int i;
if (transfer->type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS) {
CHECK_WINUSBX_AVAILABLE(sub_api);
// for isochronous, need to copy the individual iso packet actual_lengths and statuses
if ((sub_api == SUB_API_LIBUSBK) || (sub_api == SUB_API_LIBUSB0)) {
// iso only supported on libusbk-based backends for now
iso_context = transfer_priv->iso_context;
for (i = 0; i < transfer->num_iso_packets; i++) {
transfer->iso_packet_desc[i].actual_length = iso_context->IsoPackets[i].actual_length;
// TODO translate USDB_STATUS codes http://msdn.microsoft.com/en-us/library/ff539136(VS.85).aspx to libusb_transfer_status
//transfer->iso_packet_desc[i].status = transfer_priv->iso_context->IsoPackets[i].status;
}
} else if (sub_api == SUB_API_WINUSB) {
if (IS_XFERIN(transfer)) {
/* Convert isochronous packet descriptor between Windows and libusb representation.
* Both representation are guaranteed to have the same length in bytes.*/
PUSBD_ISO_PACKET_DESCRIPTOR usbd_iso_packet_desc = (PUSBD_ISO_PACKET_DESCRIPTOR)transfer->iso_packet_desc;
for (i = 0; i < transfer->num_iso_packets; ++i)
{
int length = (i < transfer->num_iso_packets - 1) ? (usbd_iso_packet_desc[i + 1].Offset - usbd_iso_packet_desc[i].Offset) : usbd_iso_packet_desc[i].Length;
int actual_length = usbd_iso_packet_desc[i].Length;
USBD_STATUS status = usbd_iso_packet_desc[i].Status;
transfer->iso_packet_desc[i].length = length;
transfer->iso_packet_desc[i].actual_length = actual_length;
transfer->iso_packet_desc[i].status = usbd_status_to_libusb_transfer_status(status);
}
}
else {
for (i = 0; i < transfer->num_iso_packets; ++i)
{
transfer->iso_packet_desc[i].status = LIBUSB_TRANSFER_COMPLETED;
}
}
} else {
// This should only occur if backend is not set correctly or other backend isoc is partially implemented
PRINT_UNSUPPORTED_API(copy_transfer_data);
return LIBUSB_ERROR_NOT_SUPPORTED;
}
}
itransfer->transferred += io_size;
return LIBUSB_TRANSFER_COMPLETED;
}
/*
* Internal HID Support functions (from libusb-win32)
* Note that functions that complete data transfer synchronously must return
* LIBUSB_COMPLETED instead of LIBUSB_SUCCESS
*/
static int _hid_get_hid_descriptor(struct hid_device_priv *dev, void *data, size_t *size);
static int _hid_get_report_descriptor(struct hid_device_priv *dev, void *data, size_t *size);
static int _hid_wcslen(WCHAR *str)
{
int i = 0;
while (str[i] && (str[i] != 0x409))
i++;
return i;
}
static int _hid_get_device_descriptor(struct hid_device_priv *dev, void *data, size_t *size)
{
struct libusb_device_descriptor d;
d.bLength = LIBUSB_DT_DEVICE_SIZE;
d.bDescriptorType = LIBUSB_DT_DEVICE;
d.bcdUSB = 0x0200; /* 2.00 */
d.bDeviceClass = 0;
d.bDeviceSubClass = 0;
d.bDeviceProtocol = 0;
d.bMaxPacketSize0 = 64; /* fix this! */
d.idVendor = (uint16_t)dev->vid;
d.idProduct = (uint16_t)dev->pid;
d.bcdDevice = 0x0100;
d.iManufacturer = dev->string_index[0];
d.iProduct = dev->string_index[1];
d.iSerialNumber = dev->string_index[2];
d.bNumConfigurations = 1;
if (*size > LIBUSB_DT_DEVICE_SIZE)
*size = LIBUSB_DT_DEVICE_SIZE;
memcpy(data, &d, *size);
return LIBUSB_COMPLETED;
}
static int _hid_get_config_descriptor(struct hid_device_priv *dev, void *data, size_t *size)
{
char num_endpoints = 0;
size_t config_total_len = 0;
char tmp[HID_MAX_CONFIG_DESC_SIZE];
struct libusb_config_descriptor *cd;
struct libusb_interface_descriptor *id;
struct libusb_hid_descriptor *hd;
struct libusb_endpoint_descriptor *ed;
size_t tmp_size;
if (dev->input_report_size)
num_endpoints++;
if (dev->output_report_size)
num_endpoints++;
config_total_len = LIBUSB_DT_CONFIG_SIZE + LIBUSB_DT_INTERFACE_SIZE
+ LIBUSB_DT_HID_SIZE + num_endpoints * LIBUSB_DT_ENDPOINT_SIZE;
cd = (struct libusb_config_descriptor *)tmp;
id = (struct libusb_interface_descriptor *)(tmp + LIBUSB_DT_CONFIG_SIZE);
hd = (struct libusb_hid_descriptor *)(tmp + LIBUSB_DT_CONFIG_SIZE
+ LIBUSB_DT_INTERFACE_SIZE);
ed = (struct libusb_endpoint_descriptor *)(tmp + LIBUSB_DT_CONFIG_SIZE
+ LIBUSB_DT_INTERFACE_SIZE
+ LIBUSB_DT_HID_SIZE);
cd->bLength = LIBUSB_DT_CONFIG_SIZE;
cd->bDescriptorType = LIBUSB_DT_CONFIG;
cd->wTotalLength = (uint16_t)config_total_len;
cd->bNumInterfaces = 1;
cd->bConfigurationValue = 1;
cd->iConfiguration = 0;
cd->bmAttributes = 1 << 7; /* bus powered */
cd->MaxPower = 50;
id->bLength = LIBUSB_DT_INTERFACE_SIZE;
id->bDescriptorType = LIBUSB_DT_INTERFACE;
id->bInterfaceNumber = 0;
id->bAlternateSetting = 0;
id->bNumEndpoints = num_endpoints;
id->bInterfaceClass = 3;
id->bInterfaceSubClass = 0;
id->bInterfaceProtocol = 0;
id->iInterface = 0;
tmp_size = LIBUSB_DT_HID_SIZE;
_hid_get_hid_descriptor(dev, hd, &tmp_size);
if (dev->input_report_size) {
ed->bLength = LIBUSB_DT_ENDPOINT_SIZE;
ed->bDescriptorType = LIBUSB_DT_ENDPOINT;
ed->bEndpointAddress = HID_IN_EP;
ed->bmAttributes = 3;
ed->wMaxPacketSize = dev->input_report_size - 1;
ed->bInterval = 10;
ed = (struct libusb_endpoint_descriptor *)((char *)ed + LIBUSB_DT_ENDPOINT_SIZE);
}
if (dev->output_report_size) {
ed->bLength = LIBUSB_DT_ENDPOINT_SIZE;
ed->bDescriptorType = LIBUSB_DT_ENDPOINT;
ed->bEndpointAddress = HID_OUT_EP;
ed->bmAttributes = 3;
ed->wMaxPacketSize = dev->output_report_size - 1;
ed->bInterval = 10;
}
if (*size > config_total_len)
*size = config_total_len;
memcpy(data, tmp, *size);
return LIBUSB_COMPLETED;
}
static int _hid_get_string_descriptor(struct hid_device_priv *dev, int _index,
void *data, size_t *size, HANDLE hid_handle)
{
void *tmp = NULL;
WCHAR string[MAX_USB_STRING_LENGTH];
size_t tmp_size = 0;
int i;
/* language ID, EN-US */
char string_langid[] = {0x09, 0x04};
if ((*size < 2) || (*size > 255))
return LIBUSB_ERROR_OVERFLOW;
if (_index == 0) {
tmp = string_langid;
tmp_size = sizeof(string_langid) + 2;
} else {
for (i = 0; i < 3; i++) {
if (_index == (dev->string_index[i])) {
tmp = dev->string[i];
tmp_size = (_hid_wcslen(dev->string[i]) + 1) * sizeof(WCHAR);
break;
}
}
if (i == 3) {
if (!HidD_GetIndexedString(hid_handle, _index, string, sizeof(string)))
return LIBUSB_ERROR_INVALID_PARAM;
tmp = string;
tmp_size = (_hid_wcslen(string) + 1) * sizeof(WCHAR);
}
}
if (!tmp_size)
return LIBUSB_ERROR_INVALID_PARAM;
if (tmp_size < *size)
*size = tmp_size;
// 2 byte header
((uint8_t *)data)[0] = (uint8_t)*size;
((uint8_t *)data)[1] = LIBUSB_DT_STRING;
memcpy((uint8_t *)data + 2, tmp, *size - 2);
return LIBUSB_COMPLETED;
}
static int _hid_get_hid_descriptor(struct hid_device_priv *dev, void *data, size_t *size)
{
struct libusb_hid_descriptor d;
uint8_t tmp[MAX_HID_DESCRIPTOR_SIZE];
size_t report_len = MAX_HID_DESCRIPTOR_SIZE;
_hid_get_report_descriptor(dev, tmp, &report_len);
d.bLength = LIBUSB_DT_HID_SIZE;
d.bDescriptorType = LIBUSB_DT_HID;
d.bcdHID = 0x0110; /* 1.10 */
d.bCountryCode = 0;
d.bNumDescriptors = 1;
d.bClassDescriptorType = LIBUSB_DT_REPORT;
d.wClassDescriptorLength = (uint16_t)report_len;
if (*size > LIBUSB_DT_HID_SIZE)
*size = LIBUSB_DT_HID_SIZE;
memcpy(data, &d, *size);
return LIBUSB_COMPLETED;
}
static int _hid_get_report_descriptor(struct hid_device_priv *dev, void *data, size_t *size)
{
uint8_t d[MAX_HID_DESCRIPTOR_SIZE];
size_t i = 0;
/* usage page */
d[i++] = 0x06; d[i++] = dev->usagePage & 0xFF; d[i++] = dev->usagePage >> 8;
/* usage */
d[i++] = 0x09; d[i++] = (uint8_t)dev->usage;
/* start collection (application) */
d[i++] = 0xA1; d[i++] = 0x01;
/* input report */
if (dev->input_report_size) {
/* usage (vendor defined) */
d[i++] = 0x09; d[i++] = 0x01;
/* logical minimum (0) */
d[i++] = 0x15; d[i++] = 0x00;
/* logical maximum (255) */
d[i++] = 0x25; d[i++] = 0xFF;
/* report size (8 bits) */
d[i++] = 0x75; d[i++] = 0x08;
/* report count */
d[i++] = 0x95; d[i++] = (uint8_t)dev->input_report_size - 1;
/* input (data, variable, absolute) */
d[i++] = 0x81; d[i++] = 0x00;
}
/* output report */
if (dev->output_report_size) {
/* usage (vendor defined) */
d[i++] = 0x09; d[i++] = 0x02;
/* logical minimum (0) */
d[i++] = 0x15; d[i++] = 0x00;
/* logical maximum (255) */
d[i++] = 0x25; d[i++] = 0xFF;
/* report size (8 bits) */
d[i++] = 0x75; d[i++] = 0x08;
/* report count */
d[i++] = 0x95; d[i++] = (uint8_t)dev->output_report_size - 1;
/* output (data, variable, absolute) */
d[i++] = 0x91; d[i++] = 0x00;
}
/* feature report */
if (dev->feature_report_size) {
/* usage (vendor defined) */
d[i++] = 0x09; d[i++] = 0x03;
/* logical minimum (0) */
d[i++] = 0x15; d[i++] = 0x00;
/* logical maximum (255) */
d[i++] = 0x25; d[i++] = 0xFF;
/* report size (8 bits) */
d[i++] = 0x75; d[i++] = 0x08;
/* report count */
d[i++] = 0x95; d[i++] = (uint8_t)dev->feature_report_size - 1;
/* feature (data, variable, absolute) */
d[i++] = 0xb2; d[i++] = 0x02; d[i++] = 0x01;
}
/* end collection */
d[i++] = 0xC0;
if (*size > i)
*size = i;
memcpy(data, d, *size);
return LIBUSB_COMPLETED;
}
static int _hid_get_descriptor(struct hid_device_priv *dev, HANDLE hid_handle, int recipient,
int type, int _index, void *data, size_t *size)
{
switch (type) {
case LIBUSB_DT_DEVICE:
usbi_dbg("LIBUSB_DT_DEVICE");
return _hid_get_device_descriptor(dev, data, size);
case LIBUSB_DT_CONFIG:
usbi_dbg("LIBUSB_DT_CONFIG");
if (!_index)
return _hid_get_config_descriptor(dev, data, size);
return LIBUSB_ERROR_INVALID_PARAM;
case LIBUSB_DT_STRING:
usbi_dbg("LIBUSB_DT_STRING");
return _hid_get_string_descriptor(dev, _index, data, size, hid_handle);
case LIBUSB_DT_HID:
usbi_dbg("LIBUSB_DT_HID");
if (!_index)
return _hid_get_hid_descriptor(dev, data, size);
return LIBUSB_ERROR_INVALID_PARAM;
case LIBUSB_DT_REPORT:
usbi_dbg("LIBUSB_DT_REPORT");
if (!_index)
return _hid_get_report_descriptor(dev, data, size);
return LIBUSB_ERROR_INVALID_PARAM;
case LIBUSB_DT_PHYSICAL:
usbi_dbg("LIBUSB_DT_PHYSICAL");
if (HidD_GetPhysicalDescriptor(hid_handle, data, (ULONG)*size))
return LIBUSB_COMPLETED;
return LIBUSB_ERROR_OTHER;
}
usbi_dbg("unsupported");
return LIBUSB_ERROR_NOT_SUPPORTED;
}
static int _hid_get_report(struct hid_device_priv *dev, HANDLE hid_handle, int id, void *data,
struct winusb_transfer_priv *tp, size_t *size, OVERLAPPED *overlapped, int report_type)
{
uint8_t *buf;
DWORD ioctl_code, read_size, expected_size = (DWORD)*size;
int r = LIBUSB_SUCCESS;
if (tp->hid_buffer != NULL)
usbi_dbg("program assertion failed: hid_buffer is not NULL");
if ((*size == 0) || (*size > MAX_HID_REPORT_SIZE)) {
usbi_dbg("invalid size (%u)", *size);
return LIBUSB_ERROR_INVALID_PARAM;
}
switch (report_type) {
case HID_REPORT_TYPE_INPUT:
ioctl_code = IOCTL_HID_GET_INPUT_REPORT;
break;
case HID_REPORT_TYPE_FEATURE:
ioctl_code = IOCTL_HID_GET_FEATURE;
break;
default:
usbi_dbg("unknown HID report type %d", report_type);
return LIBUSB_ERROR_INVALID_PARAM;
}
// Add a trailing byte to detect overflows
buf = calloc(1, expected_size + 1);
if (buf == NULL)
return LIBUSB_ERROR_NO_MEM;
buf[0] = (uint8_t)id; // Must be set always
usbi_dbg("report ID: 0x%02X", buf[0]);
tp->hid_expected_size = expected_size;
read_size = expected_size;
// NB: The size returned by DeviceIoControl doesn't include report IDs when not in use (0)
if (!DeviceIoControl(hid_handle, ioctl_code, buf, expected_size + 1,
buf, expected_size + 1, &read_size, overlapped)) {
if (GetLastError() != ERROR_IO_PENDING) {
usbi_dbg("Failed to Read HID Report: %s", windows_error_str(0));
free(buf);
return LIBUSB_ERROR_IO;
}
// Asynchronous wait
tp->hid_buffer = buf;
tp->hid_dest = data; // copy dest, as not necessarily the start of the transfer buffer
return LIBUSB_SUCCESS;
}
// Transfer completed synchronously => copy and discard extra buffer
if (read_size == 0) {
usbi_warn(NULL, "program assertion failed - read completed synchronously, but no data was read");
*size = 0;
} else {
if (buf[0] != id)
usbi_warn(NULL, "mismatched report ID (data is %02X, parameter is %02X)", buf[0], id);
if ((size_t)read_size > expected_size) {
r = LIBUSB_ERROR_OVERFLOW;
usbi_dbg("OVERFLOW!");
} else {
r = LIBUSB_COMPLETED;
}
*size = MIN((size_t)read_size, *size);
if (id == 0)
memcpy(data, buf + 1, *size); // Discard report ID
else
memcpy(data, buf, *size);
}
free(buf);
return r;
}
static int _hid_set_report(struct hid_device_priv *dev, HANDLE hid_handle, int id, void *data,
struct winusb_transfer_priv *tp, size_t *size, OVERLAPPED *overlapped, int report_type)
{
uint8_t *buf = NULL;
DWORD ioctl_code, write_size = (DWORD)*size;
// If an id is reported, we must allow MAX_HID_REPORT_SIZE + 1
size_t max_report_size = MAX_HID_REPORT_SIZE + (id ? 1 : 0);
if (tp->hid_buffer != NULL)
usbi_dbg("program assertion failed: hid_buffer is not NULL");
if ((*size == 0) || (*size > max_report_size)) {
usbi_dbg("invalid size (%u)", *size);
return LIBUSB_ERROR_INVALID_PARAM;
}
switch (report_type) {
case HID_REPORT_TYPE_OUTPUT:
ioctl_code = IOCTL_HID_SET_OUTPUT_REPORT;
break;
case HID_REPORT_TYPE_FEATURE:
ioctl_code = IOCTL_HID_SET_FEATURE;
break;
default:
usbi_dbg("unknown HID report type %d", report_type);
return LIBUSB_ERROR_INVALID_PARAM;
}
usbi_dbg("report ID: 0x%02X", id);
// When report IDs are not used (i.e. when id == 0), we must add
// a null report ID. Otherwise, we just use original data buffer
if (id == 0)
write_size++;
buf = malloc(write_size);
if (buf == NULL)
return LIBUSB_ERROR_NO_MEM;
if (id == 0) {
buf[0] = 0;
memcpy(buf + 1, data, *size);
} else {
// This seems like a waste, but if we don't duplicate the
// data, we'll get issues when freeing hid_buffer
memcpy(buf, data, *size);
if (buf[0] != id)
usbi_warn(NULL, "mismatched report ID (data is %02X, parameter is %02X)", buf[0], id);
}
// NB: The size returned by DeviceIoControl doesn't include report IDs when not in use (0)
if (!DeviceIoControl(hid_handle, ioctl_code, buf, write_size,
buf, write_size, &write_size, overlapped)) {
if (GetLastError() != ERROR_IO_PENDING) {
usbi_dbg("Failed to Write HID Output Report: %s", windows_error_str(0));
free(buf);
return LIBUSB_ERROR_IO;
}
tp->hid_buffer = buf;
tp->hid_dest = NULL;
return LIBUSB_SUCCESS;
}
// Transfer completed synchronously
*size = write_size;
if (write_size == 0)
usbi_dbg("program assertion failed - write completed synchronously, but no data was written");
free(buf);
return LIBUSB_COMPLETED;
}
static int _hid_class_request(struct hid_device_priv *dev, HANDLE hid_handle, int request_type,
int request, int value, int _index, void *data, struct winusb_transfer_priv *tp,
size_t *size, OVERLAPPED *overlapped)
{
int report_type = (value >> 8) & 0xFF;
int report_id = value & 0xFF;
if ((LIBUSB_REQ_RECIPIENT(request_type) != LIBUSB_RECIPIENT_INTERFACE)
&& (LIBUSB_REQ_RECIPIENT(request_type) != LIBUSB_RECIPIENT_DEVICE))
return LIBUSB_ERROR_INVALID_PARAM;
if (LIBUSB_REQ_OUT(request_type) && request == HID_REQ_SET_REPORT)
return _hid_set_report(dev, hid_handle, report_id, data, tp, size, overlapped, report_type);
if (LIBUSB_REQ_IN(request_type) && request == HID_REQ_GET_REPORT)
return _hid_get_report(dev, hid_handle, report_id, data, tp, size, overlapped, report_type);
return LIBUSB_ERROR_INVALID_PARAM;
}
/*
* HID API functions
*/
static int hid_init(struct libusb_context *ctx)
{
DLL_GET_HANDLE(hid);
DLL_LOAD_FUNC(hid, HidD_GetAttributes, TRUE);
DLL_LOAD_FUNC(hid, HidD_GetHidGuid, TRUE);
DLL_LOAD_FUNC(hid, HidD_GetPreparsedData, TRUE);
DLL_LOAD_FUNC(hid, HidD_FreePreparsedData, TRUE);
DLL_LOAD_FUNC(hid, HidD_GetManufacturerString, TRUE);
DLL_LOAD_FUNC(hid, HidD_GetProductString, TRUE);
DLL_LOAD_FUNC(hid, HidD_GetSerialNumberString, TRUE);
DLL_LOAD_FUNC(hid, HidD_GetIndexedString, TRUE);
DLL_LOAD_FUNC(hid, HidP_GetCaps, TRUE);
DLL_LOAD_FUNC(hid, HidD_SetNumInputBuffers, TRUE);
DLL_LOAD_FUNC(hid, HidD_GetPhysicalDescriptor, TRUE);
DLL_LOAD_FUNC(hid, HidD_FlushQueue, TRUE);
DLL_LOAD_FUNC(hid, HidP_GetValueCaps, TRUE);
api_hid_available = true;
return LIBUSB_SUCCESS;
}
static void hid_exit(void)
{
DLL_FREE_HANDLE(hid);
}
// NB: open and close must ensure that they only handle interface of
// the right API type, as these functions can be called wholesale from
// composite_open(), with interfaces belonging to different APIs
static int hid_open(int sub_api, struct libusb_device_handle *dev_handle)
{
struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
HIDD_ATTRIBUTES hid_attributes;
PHIDP_PREPARSED_DATA preparsed_data = NULL;
HIDP_CAPS capabilities;
HIDP_VALUE_CAPS *value_caps;
HANDLE hid_handle = INVALID_HANDLE_VALUE;
int i, j;
// report IDs handling
ULONG size[3];
int nb_ids[2]; // zero and nonzero report IDs
#if defined(ENABLE_LOGGING)
const char * const type[3] = {"input", "output", "feature"};
#endif
CHECK_HID_AVAILABLE;
if (priv->hid == NULL) {
usbi_err(ctx, "program assertion failed - private HID structure is unitialized");
return LIBUSB_ERROR_NOT_FOUND;
}
for (i = 0; i < USB_MAXINTERFACES; i++) {
if ((priv->usb_interface[i].path != NULL)
&& (priv->usb_interface[i].apib->id == USB_API_HID)) {
hid_handle = CreateFileA(priv->usb_interface[i].path, GENERIC_WRITE | GENERIC_READ, FILE_SHARE_WRITE | FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);
/*
* http://www.lvr.com/hidfaq.htm: Why do I receive "Access denied" when attempting to access my HID?
* "Windows 2000 and later have exclusive read/write access to HIDs that are configured as a system
* keyboards or mice. An application can obtain a handle to a system keyboard or mouse by not
* requesting READ or WRITE access with CreateFile. Applications can then use HidD_SetFeature and
* HidD_GetFeature (if the device supports Feature reports)."
*/
if (hid_handle == INVALID_HANDLE_VALUE) {
usbi_warn(ctx, "could not open HID device in R/W mode (keyboard or mouse?) - trying without");
hid_handle = CreateFileA(priv->usb_interface[i].path, 0, FILE_SHARE_WRITE | FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);
if (hid_handle == INVALID_HANDLE_VALUE) {
usbi_err(ctx, "could not open device %s (interface %d): %s", priv->path, i, windows_error_str(0));
switch (GetLastError()) {
case ERROR_FILE_NOT_FOUND: // The device was disconnected
return LIBUSB_ERROR_NO_DEVICE;
case ERROR_ACCESS_DENIED:
return LIBUSB_ERROR_ACCESS;
default:
return LIBUSB_ERROR_IO;
}
}
priv->usb_interface[i].restricted_functionality = true;
}
handle_priv->interface_handle[i].api_handle = hid_handle;
}
}
hid_attributes.Size = sizeof(hid_attributes);
do {
if (!HidD_GetAttributes(hid_handle, &hid_attributes)) {
usbi_err(ctx, "could not gain access to HID top collection (HidD_GetAttributes)");
break;
}
priv->hid->vid = hid_attributes.VendorID;
priv->hid->pid = hid_attributes.ProductID;
// Set the maximum available input buffer size
for (i = 32; HidD_SetNumInputBuffers(hid_handle, i); i *= 2);
usbi_dbg("set maximum input buffer size to %d", i / 2);
// Get the maximum input and output report size
if (!HidD_GetPreparsedData(hid_handle, &preparsed_data) || !preparsed_data) {
usbi_err(ctx, "could not read HID preparsed data (HidD_GetPreparsedData)");
break;
}
if (HidP_GetCaps(preparsed_data, &capabilities) != HIDP_STATUS_SUCCESS) {
usbi_err(ctx, "could not parse HID capabilities (HidP_GetCaps)");
break;
}
// Find out if interrupt will need report IDs
size[0] = capabilities.NumberInputValueCaps;
size[1] = capabilities.NumberOutputValueCaps;
size[2] = capabilities.NumberFeatureValueCaps;
for (j = HidP_Input; j <= HidP_Feature; j++) {
usbi_dbg("%u HID %s report value(s) found", (unsigned int)size[j], type[j]);
priv->hid->uses_report_ids[j] = false;
if (size[j] > 0) {
value_caps = calloc(size[j], sizeof(HIDP_VALUE_CAPS));
if ((value_caps != NULL)
&& (HidP_GetValueCaps((HIDP_REPORT_TYPE)j, value_caps, &size[j], preparsed_data) == HIDP_STATUS_SUCCESS)
&& (size[j] >= 1)) {
nb_ids[0] = 0;
nb_ids[1] = 0;
for (i = 0; i < (int)size[j]; i++) {
usbi_dbg(" Report ID: 0x%02X", value_caps[i].ReportID);
if (value_caps[i].ReportID != 0)
nb_ids[1]++;
else
nb_ids[0]++;
}
if (nb_ids[1] != 0) {
if (nb_ids[0] != 0)
usbi_warn(ctx, "program assertion failed: zero and nonzero report IDs used for %s",
type[j]);
priv->hid->uses_report_ids[j] = true;
}
} else {
usbi_warn(ctx, " could not process %s report IDs", type[j]);
}
free(value_caps);
}
}
// Set the report sizes
priv->hid->input_report_size = capabilities.InputReportByteLength;
priv->hid->output_report_size = capabilities.OutputReportByteLength;
priv->hid->feature_report_size = capabilities.FeatureReportByteLength;
// Store usage and usagePage values
priv->hid->usage = capabilities.Usage;
priv->hid->usagePage = capabilities.UsagePage;
// Fetch string descriptors
priv->hid->string_index[0] = priv->dev_descriptor.iManufacturer;
if (priv->hid->string_index[0] != 0)
HidD_GetManufacturerString(hid_handle, priv->hid->string[0], sizeof(priv->hid->string[0]));
else
priv->hid->string[0][0] = 0;
priv->hid->string_index[1] = priv->dev_descriptor.iProduct;
if (priv->hid->string_index[1] != 0)
HidD_GetProductString(hid_handle, priv->hid->string[1], sizeof(priv->hid->string[1]));
else
priv->hid->string[1][0] = 0;
priv->hid->string_index[2] = priv->dev_descriptor.iSerialNumber;
if (priv->hid->string_index[2] != 0)
HidD_GetSerialNumberString(hid_handle, priv->hid->string[2], sizeof(priv->hid->string[2]));
else
priv->hid->string[2][0] = 0;
} while (0);
if (preparsed_data)
HidD_FreePreparsedData(preparsed_data);
return LIBUSB_SUCCESS;
}
static void hid_close(int sub_api, struct libusb_device_handle *dev_handle)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
HANDLE file_handle;
int i;
if (!api_hid_available)
return;
for (i = 0; i < USB_MAXINTERFACES; i++) {
if (priv->usb_interface[i].apib->id == USB_API_HID) {
file_handle = handle_priv->interface_handle[i].api_handle;
if (HANDLE_VALID(file_handle))
CloseHandle(file_handle);
}
}
}
static int hid_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface)
{
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
CHECK_HID_AVAILABLE;
// NB: Disconnection detection is not possible in this function
if (priv->usb_interface[iface].path == NULL)
return LIBUSB_ERROR_NOT_FOUND; // invalid iface
// We use dev_handle as a flag for interface claimed
if (handle_priv->interface_handle[iface].dev_handle == INTERFACE_CLAIMED)
return LIBUSB_ERROR_BUSY; // already claimed
handle_priv->interface_handle[iface].dev_handle = INTERFACE_CLAIMED;
usbi_dbg("claimed interface %d", iface);
handle_priv->active_interface = iface;
return LIBUSB_SUCCESS;
}
static int hid_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface)
{
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
CHECK_HID_AVAILABLE;
if (priv->usb_interface[iface].path == NULL)
return LIBUSB_ERROR_NOT_FOUND; // invalid iface
if (handle_priv->interface_handle[iface].dev_handle != INTERFACE_CLAIMED)
return LIBUSB_ERROR_NOT_FOUND; // invalid iface
handle_priv->interface_handle[iface].dev_handle = INVALID_HANDLE_VALUE;
return LIBUSB_SUCCESS;
}
static int hid_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting)
{
struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev);
CHECK_HID_AVAILABLE;
if (altsetting > 255)
return LIBUSB_ERROR_INVALID_PARAM;
if (altsetting != 0) {
usbi_err(ctx, "set interface altsetting not supported for altsetting >0");
return LIBUSB_ERROR_NOT_SUPPORTED;
}
return LIBUSB_SUCCESS;
}
static int hid_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev);
WINUSB_SETUP_PACKET *setup = (WINUSB_SETUP_PACKET *)transfer->buffer;
HANDLE hid_handle;
OVERLAPPED *overlapped;
int current_interface, config;
size_t size;
int r = LIBUSB_ERROR_INVALID_PARAM;
CHECK_HID_AVAILABLE;
safe_free(transfer_priv->hid_buffer);
transfer_priv->hid_dest = NULL;
size = transfer->length - LIBUSB_CONTROL_SETUP_SIZE;
if (size > MAX_CTRL_BUFFER_LENGTH)
return LIBUSB_ERROR_INVALID_PARAM;
current_interface = get_valid_interface(transfer->dev_handle, USB_API_HID);
if (current_interface < 0) {
if (auto_claim(transfer, &current_interface, USB_API_HID) != LIBUSB_SUCCESS)
return LIBUSB_ERROR_NOT_FOUND;
}
usbi_dbg("will use interface %d", current_interface);
hid_handle = handle_priv->interface_handle[current_interface].api_handle;
overlapped = transfer_priv->pollable_fd.overlapped;
switch (LIBUSB_REQ_TYPE(setup->RequestType)) {
case LIBUSB_REQUEST_TYPE_STANDARD:
switch (setup->Request) {
case LIBUSB_REQUEST_GET_DESCRIPTOR:
r = _hid_get_descriptor(priv->hid, hid_handle, LIBUSB_REQ_RECIPIENT(setup->RequestType),
(setup->Value >> 8) & 0xFF, setup->Value & 0xFF, transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE, &size);
break;
case LIBUSB_REQUEST_GET_CONFIGURATION:
r = winusb_get_configuration(transfer->dev_handle, &config);
if (r == LIBUSB_SUCCESS) {
size = 1;
((uint8_t *)transfer->buffer)[LIBUSB_CONTROL_SETUP_SIZE] = (uint8_t)config;
r = LIBUSB_COMPLETED;
}
break;
case LIBUSB_REQUEST_SET_CONFIGURATION:
if (setup->Value == priv->active_config) {
r = LIBUSB_COMPLETED;
} else {
usbi_warn(ctx, "cannot set configuration other than the default one");
r = LIBUSB_ERROR_NOT_SUPPORTED;
}
break;
case LIBUSB_REQUEST_GET_INTERFACE:
size = 1;
((uint8_t *)transfer->buffer)[LIBUSB_CONTROL_SETUP_SIZE] = 0;
r = LIBUSB_COMPLETED;
break;
case LIBUSB_REQUEST_SET_INTERFACE:
r = hid_set_interface_altsetting(0, transfer->dev_handle, setup->Index, setup->Value);
if (r == LIBUSB_SUCCESS)
r = LIBUSB_COMPLETED;
break;
default:
usbi_warn(ctx, "unsupported HID control request");
return LIBUSB_ERROR_NOT_SUPPORTED;
}
break;
case LIBUSB_REQUEST_TYPE_CLASS:
r = _hid_class_request(priv->hid, hid_handle, setup->RequestType, setup->Request, setup->Value,
setup->Index, transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE, transfer_priv,
&size, overlapped);
break;
default:
usbi_warn(ctx, "unsupported HID control request");
return LIBUSB_ERROR_NOT_SUPPORTED;
}
if (r < 0)
return r;
if (r == LIBUSB_COMPLETED) {
// Force request to be completed synchronously. Transferred size has been set by previous call
windows_force_sync_completion(overlapped, (ULONG)size);
r = LIBUSB_SUCCESS;
}
transfer_priv->interface_number = (uint8_t)current_interface;
return LIBUSB_SUCCESS;
}
static int hid_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
HANDLE hid_handle;
OVERLAPPED *overlapped;
bool direction_in, ret;
int current_interface, length;
DWORD size;
int r = LIBUSB_SUCCESS;
CHECK_HID_AVAILABLE;
transfer_priv->hid_dest = NULL;
safe_free(transfer_priv->hid_buffer);
current_interface = interface_by_endpoint(priv, handle_priv, transfer->endpoint);
if (current_interface < 0) {
usbi_err(ctx, "unable to match endpoint to an open interface - cancelling transfer");
return LIBUSB_ERROR_NOT_FOUND;
}
usbi_dbg("matched endpoint %02X with interface %d", transfer->endpoint, current_interface);
transfer_priv->handle = hid_handle = handle_priv->interface_handle[current_interface].api_handle;
overlapped = transfer_priv->pollable_fd.overlapped;
direction_in = IS_XFERIN(transfer);
// If report IDs are not in use, an extra prefix byte must be added
if (((direction_in) && (!priv->hid->uses_report_ids[0]))
|| ((!direction_in) && (!priv->hid->uses_report_ids[1])))
length = transfer->length + 1;
else
length = transfer->length;
// Add a trailing byte to detect overflows on input
transfer_priv->hid_buffer = calloc(1, length + 1);
if (transfer_priv->hid_buffer == NULL)
return LIBUSB_ERROR_NO_MEM;
transfer_priv->hid_expected_size = length;
if (direction_in) {
transfer_priv->hid_dest = transfer->buffer;
usbi_dbg("reading %d bytes (report ID: 0x00)", length);
ret = ReadFile(hid_handle, transfer_priv->hid_buffer, length + 1, &size, overlapped);
} else {
if (!priv->hid->uses_report_ids[1])
memcpy(transfer_priv->hid_buffer + 1, transfer->buffer, transfer->length);
else
// We could actually do without the calloc and memcpy in this case
memcpy(transfer_priv->hid_buffer, transfer->buffer, transfer->length);
usbi_dbg("writing %d bytes (report ID: 0x%02X)", length, transfer_priv->hid_buffer[0]);
ret = WriteFile(hid_handle, transfer_priv->hid_buffer, length, &size, overlapped);
}
if (!ret) {
if (GetLastError() != ERROR_IO_PENDING) {
usbi_err(ctx, "HID transfer failed: %s", windows_error_str(0));
safe_free(transfer_priv->hid_buffer);
return LIBUSB_ERROR_IO;
}
} else {
// Only write operations that completed synchronously need to free up
// hid_buffer. For reads, copy_transfer_data() handles that process.
if (!direction_in)
safe_free(transfer_priv->hid_buffer);
if (size == 0) {
usbi_err(ctx, "program assertion failed - no data was transferred");
size = 1;
}
if (size > (size_t)length) {
usbi_err(ctx, "OVERFLOW!");
r = LIBUSB_ERROR_OVERFLOW;
}
windows_force_sync_completion(overlapped, (ULONG)size);
}
transfer_priv->interface_number = (uint8_t)current_interface;
return r;
}
static int hid_abort_transfers(int sub_api, struct usbi_transfer *itransfer)
{
struct libusb_context *ctx = ITRANSFER_CTX(itransfer);
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle);
HANDLE hid_handle;
int current_interface;
CHECK_HID_AVAILABLE;
current_interface = transfer_priv->interface_number;
if ((current_interface < 0) || (current_interface >= USB_MAXINTERFACES)) {
usbi_err(ctx, "program assertion failed: invalid interface_number");
return LIBUSB_ERROR_NOT_FOUND;
}
usbi_dbg("will use interface %d", current_interface);
hid_handle = handle_priv->interface_handle[current_interface].api_handle;
if (pCancelIoEx != NULL) {
// Use CancelIoEx if available to cancel just a single transfer
if (pCancelIoEx(hid_handle, transfer_priv->pollable_fd.overlapped))
return LIBUSB_SUCCESS;
} else {
if (CancelIo(hid_handle))
return LIBUSB_SUCCESS;
}
usbi_warn(ctx, "cancel failed: %s", windows_error_str(0));
return LIBUSB_ERROR_NOT_FOUND;
}
static int hid_reset_device(int sub_api, struct libusb_device_handle *dev_handle)
{
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
HANDLE hid_handle;
int current_interface;
CHECK_HID_AVAILABLE;
// Flushing the queues on all interfaces is the best we can achieve
for (current_interface = 0; current_interface < USB_MAXINTERFACES; current_interface++) {
hid_handle = handle_priv->interface_handle[current_interface].api_handle;
if (HANDLE_VALID(hid_handle))
HidD_FlushQueue(hid_handle);
}
return LIBUSB_SUCCESS;
}
static int hid_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint)
{
struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
HANDLE hid_handle;
int current_interface;
CHECK_HID_AVAILABLE;
current_interface = interface_by_endpoint(priv, handle_priv, endpoint);
if (current_interface < 0) {
usbi_err(ctx, "unable to match endpoint to an open interface - cannot clear");
return LIBUSB_ERROR_NOT_FOUND;
}
usbi_dbg("matched endpoint %02X with interface %d", endpoint, current_interface);
hid_handle = handle_priv->interface_handle[current_interface].api_handle;
// No endpoint selection with Microsoft's implementation, so we try to flush the
// whole interface. Should be OK for most case scenarios
if (!HidD_FlushQueue(hid_handle)) {
usbi_err(ctx, "Flushing of HID queue failed: %s", windows_error_str(0));
// Device was probably disconnected
return LIBUSB_ERROR_NO_DEVICE;
}
return LIBUSB_SUCCESS;
}
// This extra function is only needed for HID
static int hid_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
int r = LIBUSB_TRANSFER_COMPLETED;
uint32_t corrected_size = io_size;
if (transfer_priv->hid_buffer != NULL) {
// If we have a valid hid_buffer, it means the transfer was async
if (transfer_priv->hid_dest != NULL) { // Data readout
if (corrected_size > 0) {
// First, check for overflow
if (corrected_size > transfer_priv->hid_expected_size) {
usbi_err(ctx, "OVERFLOW!");
corrected_size = (uint32_t)transfer_priv->hid_expected_size;
r = LIBUSB_TRANSFER_OVERFLOW;
}
if (transfer_priv->hid_buffer[0] == 0) {
// Discard the 1 byte report ID prefix
corrected_size--;
memcpy(transfer_priv->hid_dest, transfer_priv->hid_buffer + 1, corrected_size);
} else {
memcpy(transfer_priv->hid_dest, transfer_priv->hid_buffer, corrected_size);
}
}
transfer_priv->hid_dest = NULL;
}
// For write, we just need to free the hid buffer
safe_free(transfer_priv->hid_buffer);
}
itransfer->transferred += corrected_size;
return r;
}
/*
* Composite API functions
*/
static int composite_open(int sub_api, struct libusb_device_handle *dev_handle)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
int r = LIBUSB_ERROR_NOT_FOUND;
uint8_t i;
// SUB_API_MAX + 1 as the SUB_API_MAX pos is used to indicate availability of HID
bool available[SUB_API_MAX + 1] = { 0 };
for (i = 0; i < USB_MAXINTERFACES; i++) {
switch (priv->usb_interface[i].apib->id) {
case USB_API_WINUSBX:
if (priv->usb_interface[i].sub_api != SUB_API_NOTSET)
available[priv->usb_interface[i].sub_api] = true;
break;
case USB_API_HID:
available[SUB_API_MAX] = true;
break;
default:
break;
}
}
for (i = 0; i < SUB_API_MAX; i++) { // WinUSB-like drivers
if (available[i]) {
r = usb_api_backend[USB_API_WINUSBX].open(i, dev_handle);
if (r != LIBUSB_SUCCESS)
return r;
}
}
if (available[SUB_API_MAX]) // HID driver
r = hid_open(SUB_API_NOTSET, dev_handle);
return r;
}
static void composite_close(int sub_api, struct libusb_device_handle *dev_handle)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
uint8_t i;
// SUB_API_MAX + 1 as the SUB_API_MAX pos is used to indicate availability of HID
bool available[SUB_API_MAX + 1] = { 0 };
for (i = 0; i < USB_MAXINTERFACES; i++) {
switch (priv->usb_interface[i].apib->id) {
case USB_API_WINUSBX:
if (priv->usb_interface[i].sub_api != SUB_API_NOTSET)
available[priv->usb_interface[i].sub_api] = true;
break;
case USB_API_HID:
available[SUB_API_MAX] = true;
break;
default:
break;
}
}
for (i = 0; i < SUB_API_MAX; i++) { // WinUSB-like drivers
if (available[i])
usb_api_backend[USB_API_WINUSBX].close(i, dev_handle);
}
if (available[SUB_API_MAX]) // HID driver
hid_close(SUB_API_NOTSET, dev_handle);
}
static int composite_claim_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
CHECK_SUPPORTED_API(priv->usb_interface[iface].apib, claim_interface);
return priv->usb_interface[iface].apib->
claim_interface(priv->usb_interface[iface].sub_api, dev_handle, iface);
}
static int composite_set_interface_altsetting(int sub_api, struct libusb_device_handle *dev_handle, int iface, int altsetting)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
CHECK_SUPPORTED_API(priv->usb_interface[iface].apib, set_interface_altsetting);
return priv->usb_interface[iface].apib->
set_interface_altsetting(priv->usb_interface[iface].sub_api, dev_handle, iface, altsetting);
}
static int composite_release_interface(int sub_api, struct libusb_device_handle *dev_handle, int iface)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
CHECK_SUPPORTED_API(priv->usb_interface[iface].apib, release_interface);
return priv->usb_interface[iface].apib->
release_interface(priv->usb_interface[iface].sub_api, dev_handle, iface);
}
static int composite_submit_control_transfer(int sub_api, struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
struct libusb_config_descriptor *conf_desc;
WINUSB_SETUP_PACKET *setup = (WINUSB_SETUP_PACKET *)transfer->buffer;
int iface, pass, r;
// Interface shouldn't matter for control, but it does in practice, with Windows'
// restrictions with regards to accessing HID keyboards and mice. Try to target
// a specific interface first, if possible.
switch (LIBUSB_REQ_RECIPIENT(setup->RequestType)) {
case LIBUSB_RECIPIENT_INTERFACE:
iface = setup->Index & 0xFF;
break;
case LIBUSB_RECIPIENT_ENDPOINT:
r = libusb_get_active_config_descriptor(transfer->dev_handle->dev, &conf_desc);
if (r == LIBUSB_SUCCESS) {
iface = get_interface_by_endpoint(conf_desc, (setup->Index & 0xFF));
libusb_free_config_descriptor(conf_desc);
break;
}
// Fall through if not able to determine interface
default:
iface = -1;
break;
}
// Try and target a specific interface if the control setup indicates such
if ((iface >= 0) && (iface < USB_MAXINTERFACES)) {
usbi_dbg("attempting control transfer targeted to interface %d", iface);
if ((priv->usb_interface[iface].path != NULL)
&& (priv->usb_interface[iface].apib->submit_control_transfer != NULL)) {
r = priv->usb_interface[iface].apib->submit_control_transfer(priv->usb_interface[iface].sub_api, itransfer);
if (r == LIBUSB_SUCCESS)
return r;
}
}
// Either not targeted to a specific interface or no luck in doing so.
// Try a 2 pass approach with all interfaces.
for (pass = 0; pass < 2; pass++) {
for (iface = 0; iface < USB_MAXINTERFACES; iface++) {
if ((priv->usb_interface[iface].path != NULL)
&& (priv->usb_interface[iface].apib->submit_control_transfer != NULL)) {
if ((pass == 0) && (priv->usb_interface[iface].restricted_functionality)) {
usbi_dbg("trying to skip restricted interface #%d (HID keyboard or mouse?)", iface);
continue;
}
usbi_dbg("using interface %d", iface);
r = priv->usb_interface[iface].apib->submit_control_transfer(priv->usb_interface[iface].sub_api, itransfer);
// If not supported on this API, it may be supported on another, so don't give up yet!!
if (r == LIBUSB_ERROR_NOT_SUPPORTED)
continue;
return r;
}
}
}
usbi_err(ctx, "no libusb supported interfaces to complete request");
return LIBUSB_ERROR_NOT_FOUND;
}
static int composite_submit_bulk_transfer(int sub_api, struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
int current_interface;
current_interface = interface_by_endpoint(priv, handle_priv, transfer->endpoint);
if (current_interface < 0) {
usbi_err(ctx, "unable to match endpoint to an open interface - cancelling transfer");
return LIBUSB_ERROR_NOT_FOUND;
}
CHECK_SUPPORTED_API(priv->usb_interface[current_interface].apib, submit_bulk_transfer);
return priv->usb_interface[current_interface].apib->
submit_bulk_transfer(priv->usb_interface[current_interface].sub_api, itransfer);
}
static int composite_submit_iso_transfer(int sub_api, struct usbi_transfer *itransfer) {
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct libusb_context *ctx = DEVICE_CTX(transfer->dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(transfer->dev_handle);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
int current_interface;
current_interface = interface_by_endpoint(priv, handle_priv, transfer->endpoint);
if (current_interface < 0) {
usbi_err(ctx, "unable to match endpoint to an open interface - cancelling transfer");
return LIBUSB_ERROR_NOT_FOUND;
}
CHECK_SUPPORTED_API(priv->usb_interface[current_interface].apib, submit_iso_transfer);
return priv->usb_interface[current_interface].apib->
submit_iso_transfer(priv->usb_interface[current_interface].sub_api, itransfer);
}
static int composite_clear_halt(int sub_api, struct libusb_device_handle *dev_handle, unsigned char endpoint)
{
struct libusb_context *ctx = DEVICE_CTX(dev_handle->dev);
struct winusb_device_handle_priv *handle_priv = _device_handle_priv(dev_handle);
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
int current_interface;
current_interface = interface_by_endpoint(priv, handle_priv, endpoint);
if (current_interface < 0) {
usbi_err(ctx, "unable to match endpoint to an open interface - cannot clear");
return LIBUSB_ERROR_NOT_FOUND;
}
CHECK_SUPPORTED_API(priv->usb_interface[current_interface].apib, clear_halt);
return priv->usb_interface[current_interface].apib->
clear_halt(priv->usb_interface[current_interface].sub_api, dev_handle, endpoint);
}
static int composite_abort_control(int sub_api, struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
int current_interface = transfer_priv->interface_number;
if ((current_interface < 0) || (current_interface >= USB_MAXINTERFACES)) {
usbi_err(TRANSFER_CTX(transfer), "program assertion failed: invalid interface_number");
return LIBUSB_ERROR_NOT_FOUND;
}
CHECK_SUPPORTED_API(priv->usb_interface[current_interface].apib, abort_control);
return priv->usb_interface[current_interface].apib->
abort_control(priv->usb_interface[current_interface].sub_api, itransfer);
}
static int composite_abort_transfers(int sub_api, struct usbi_transfer *itransfer)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
int current_interface = transfer_priv->interface_number;
if ((current_interface < 0) || (current_interface >= USB_MAXINTERFACES)) {
usbi_err(TRANSFER_CTX(transfer), "program assertion failed: invalid interface_number");
return LIBUSB_ERROR_NOT_FOUND;
}
CHECK_SUPPORTED_API(priv->usb_interface[current_interface].apib, abort_transfers);
return priv->usb_interface[current_interface].apib->
abort_transfers(priv->usb_interface[current_interface].sub_api, itransfer);
}
static int composite_reset_device(int sub_api, struct libusb_device_handle *dev_handle)
{
struct winusb_device_priv *priv = _device_priv(dev_handle->dev);
int r;
uint8_t i;
bool available[SUB_API_MAX];
for (i = 0; i < SUB_API_MAX; i++)
available[i] = false;
for (i = 0; i < USB_MAXINTERFACES; i++) {
if ((priv->usb_interface[i].apib->id == USB_API_WINUSBX)
&& (priv->usb_interface[i].sub_api != SUB_API_NOTSET))
available[priv->usb_interface[i].sub_api] = true;
}
for (i = 0; i < SUB_API_MAX; i++) {
if (available[i]) {
r = usb_api_backend[USB_API_WINUSBX].reset_device(i, dev_handle);
if (r != LIBUSB_SUCCESS)
return r;
}
}
return LIBUSB_SUCCESS;
}
static int composite_copy_transfer_data(int sub_api, struct usbi_transfer *itransfer, uint32_t io_size)
{
struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
struct winusb_transfer_priv *transfer_priv = usbi_transfer_get_os_priv(itransfer);
struct winusb_device_priv *priv = _device_priv(transfer->dev_handle->dev);
int current_interface = transfer_priv->interface_number;
CHECK_SUPPORTED_API(priv->usb_interface[current_interface].apib, copy_transfer_data);
return priv->usb_interface[current_interface].apib->
copy_transfer_data(priv->usb_interface[current_interface].sub_api, itransfer, io_size);
}
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