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third_party_cups/ohos-usb-manager.patch
b30052170 fb947b6234 usbmanager patch Signed-off-by:baozewei@huawei.com 
Signed-off-by: b30052170 <baozewei@huawei.com>
2024-08-16 09:14:47 +08:00

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diff --git a/backend/usb_manager.cxx b/backend/usb_manager.cxx
new file mode 100644
index 0000000..d75d035
--- /dev/null
+++ b/backend/usb_manager.cxx
@@ -0,0 +1,643 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * OH USB interface code for CUPS.
+ */
+
+/*
+ * Include necessary headers.
+ */
+
+#include "usb_manager.h"
+#include "usb_srv_client.h"
+#include "v1_0/iusb_interface.h"
+
+#include <map>
+#include <regex>
+#include <string>
+#include <thread>
+#include <securec.h>
+
+using namespace std;
+using namespace OHOS;
+using namespace OHOS::USB;
+
+#define SAFE_DELETE(ptr) \
+ if ((ptr) != nullptr) { \
+ delete (ptr); \
+ (ptr) = nullptr; \
+ }
+
+#define SAFE_DELETE_ARRAY(ptr) \
+ if ((ptr) != nullptr) { \
+ delete[] (ptr); \
+ (ptr) = nullptr; \
+ }
+
+int32_t BulkTransferWriteData(
+ USBDevicePipe &usbDevicePipe, USBEndpoint &endpoint, const std::string &sendDataStr, int32_t timeout);
+int32_t ParseDeviceDescriptor(UsbDevice &usbDevice, ohusb_device_descriptor *devDesc);
+int32_t ParseConfigDescriptor(USBConfig &usbConfig, ohusb_config_descriptor *confDesc);
+int32_t ParseInterfaceDescriptor(UsbInterface &usbInterface, ohusb_interface_descriptor *ifaceDesc);
+int32_t ParseEndpointDescriptor(USBEndpoint &usbEndpoint, ohusb_endpoint_descriptor *epDesc);
+void ReleaseDeviceDescriptor(ohusb_device_descriptor *devDesc);
+void ReleaseConfigDescriptor(ohusb_config_descriptor *confDesc);
+void ReleaseInterface(ohusb_interface *iface);
+void ReleaseInterfaceDescriptor(ohusb_interface_descriptor *ifaceDesc);
+void DumpDeviceDescriptor(ohusb_device_descriptor *devdesc);
+void DumpConfigDescriptor(ohusb_config_descriptor *confDesc);
+void DumpInterfaceDescriptor(ohusb_interface_descriptor *ifaceDesc);
+void DumpEndpointDescriptor(ohusb_endpoint_descriptor *eptDesc);
+char *CopyString(const std::string &source);
+
+int32_t OH_GetDevices(ohusb_device_descriptor** list, ssize_t *numdevs)
+{
+ fprintf(stderr, "DEBUG: OH_GetDevices enter\n");
+ vector<UsbDevice> devlist;
+ auto &usbSrvClient = OHOS::USB::UsbSrvClient::GetInstance();
+ auto getDevRet = usbSrvClient.GetDevices(devlist);
+ fprintf(stderr, "DEBUG: OH_GetDevices getDevRet = %d\n", getDevRet);
+ if (getDevRet != OHOS::ERR_OK) {
+ return OHUSB_ERROR_IO;
+ }
+ if (devlist.empty()) {
+ return OHUSB_SUCCESS;
+ }
+ ssize_t devCount = devlist.size();
+ *numdevs = 0;
+ fprintf(stderr, "DEBUG: OH_GetDevices device nums = %zd\n", devCount);
+
+ *list = (ohusb_device_descriptor *)calloc((size_t)devCount, sizeof(ohusb_device_descriptor));
+ if (*list == nullptr) {
+ fprintf(stderr, "DEBUG: OH_GetDevices list is nullptr\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+ for (ssize_t i = 0; i < devCount; i++) {
+ fprintf(stderr, "DEBUG: OH_GetDevices devlist[%zd] devAddr = %d, busNum = %d\n",
+ i, devlist[i].GetDevAddr(), devlist[i].GetBusNum());
+ if (ParseDeviceDescriptor(devlist[i], *list + i) != OHUSB_SUCCESS) {
+ return OHUSB_ERROR_IO;
+ }
+ (*numdevs)++;
+ }
+ return OHUSB_SUCCESS;
+}
+
+int32_t OH_OpenDevice(ohusb_device_descriptor *devDesc, ohusb_pipe **pipe)
+{
+ fprintf(stderr, "DEBUG: OH_OpenDevice enter\n");
+ auto &usbSrvClient = OHOS::USB::UsbSrvClient::GetInstance();
+ UsbDevice usbDevice;
+ usbDevice.SetBusNum(devDesc->busNum);
+ usbDevice.SetDevAddr(devDesc->devAddr);
+ USBDevicePipe usbDevicePipe;
+ auto openDevRet = usbSrvClient.OpenDevice(usbDevice, usbDevicePipe);
+ fprintf(stderr, "DEBUG: OH_OpenDevice getDevRet = %d\n", openDevRet);
+ if (openDevRet != OHOS::ERR_OK) {
+ return OHUSB_ERROR_IO;
+ }
+ *pipe = (ohusb_pipe *)calloc(1, sizeof(ohusb_pipe));
+ if (*pipe == nullptr) {
+ fprintf(stderr, "DEBUG: OH_OpenDevice pipe is nullptr\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+ (*pipe)->busNum = usbDevicePipe.GetBusNum();
+ (*pipe)->devAddr = usbDevicePipe.GetDevAddr();
+ fprintf(stderr, "DEBUG: OH_OpenDevice busNum=%d, devAddr=%d\n", (*pipe)->busNum, (*pipe)->devAddr);
+ fprintf(stderr, "DEBUG: OH_OpenDevice out\n");
+ return OHUSB_SUCCESS;
+}
+
+int32_t OH_CloseDevice(ohusb_pipe *pipe)
+{
+ fprintf(stderr, "DEBUG: OH_CloseDevice enter\n");
+ auto &usbSrvClient = OHOS::USB::UsbSrvClient::GetInstance();
+ USBDevicePipe usbDevicePipe = {pipe->busNum, pipe->devAddr};
+ int32_t ret = usbSrvClient.Close(usbDevicePipe);
+ if (ret != ERR_OK) {
+ fprintf(stderr, "DEBUG: OH_CloseDevice fail with ret = %d\n", ret);
+ return OHUSB_ERROR_BUSY;
+ }
+ fprintf(stderr, "DEBUG: OH_CloseDevice out\n");
+ return OHUSB_SUCCESS;
+}
+
+int32_t OH_ClaimInterface(ohusb_pipe *pipe, int interfaceId, bool force)
+{
+ fprintf(stderr, "DEBUG: OH_ClaimInterface enter\n");
+ auto &usbSrvClient = OHOS::USB::UsbSrvClient::GetInstance();
+ USBDevicePipe usbDevicePipe = {pipe->busNum, pipe->devAddr};
+ UsbInterface usbInterface;
+ usbInterface.SetId(interfaceId);
+ int32_t ret = usbSrvClient.ClaimInterface(usbDevicePipe, usbInterface, force);
+ if (ret != ERR_OK) {
+ fprintf(stderr, "DEBUG: OH_ClaimInterface fail with ret = %d\n", ret);
+ return OHUSB_ERROR_BUSY;
+ }
+ fprintf(stderr, "DEBUG: OH_ClaimInterface out\n");
+ return OHUSB_SUCCESS;
+}
+
+int32_t OH_ReleaseInterface(ohusb_pipe *pipe, int interfaceId)
+{
+ fprintf(stderr, "DEBUG: OH_ReleaseInterface enter\n");
+ auto &usbSrvClient = OHOS::USB::UsbSrvClient::GetInstance();
+ USBDevicePipe usbDevicePipe = {pipe->busNum, pipe->devAddr};
+ UsbInterface usbInterface;
+ usbInterface.SetId(interfaceId);
+ int32_t ret = usbSrvClient.ReleaseInterface(usbDevicePipe, usbInterface);
+ if (ret != ERR_OK) {
+ fprintf(stderr, "DEBUG: OH_ReleaseInterface fail with ret = %d\n", ret);
+ return OHUSB_ERROR_BUSY;
+ }
+ fprintf(stderr, "DEBUG: OH_ReleaseInterface out\n");
+ return OHUSB_SUCCESS;
+}
+
+int32_t OH_BulkTransferRead(
+ ohusb_pipe *pipe, ohusb_transfer_pipe *tpipe, unsigned char *data, int length, int *transferred)
+{
+ fprintf(stderr, "DEBUG: OH_BulkTransferRead enter\n");
+ auto &usbSrvClient = OHOS::USB::UsbSrvClient::GetInstance();
+ USBDevicePipe usbDevicePipe = {pipe->busNum, pipe->devAddr};
+ USBEndpoint endpoint;
+ endpoint.SetInterfaceId(tpipe->bInterfaceId);
+ endpoint.SetAddr(tpipe->bEndpointAddress);
+ std::vector<uint8_t> readTempBuffer;
+ size_t readSize = 0;
+ int32_t ret = usbSrvClient.BulkTransfer(usbDevicePipe, endpoint, readTempBuffer, OHUSB_BULKTRANSFER_READ_TIMEOUT);
+ fprintf(stderr, "DEBUG: OH_BulkTransferRead ret = %d\n", ret);
+ if (ret == HDF_DEV_ERR_NO_DEVICE) {
+ fprintf(stderr, "DEBUG: OH_BulkTransferRead HDF_DEV_ERR_NO_DEVICE, The device module has no device\n");
+ return OHUSB_ERROR_NO_DEVICE;
+ }
+ readSize = readTempBuffer.size();
+ if (ret == OHUSB_SUCCESS) {
+ std::copy(readTempBuffer.begin(), readTempBuffer.begin() + readSize, data);
+ fprintf(stderr, "DEBUG: OH_BulkTransferRead readSize = %zu\n", readSize);
+ *transferred = readSize;
+ return OHUSB_SUCCESS;
+ }
+
+ fprintf(stderr, "DEBUG: OH_BulkTransferRead read data time out\n");
+ return OHUSB_ERROR_TIMEOUT;
+}
+
+int32_t OH_BulkTransferWrite(
+ ohusb_pipe *pipe, ohusb_transfer_pipe *tpipe, unsigned char *data, int length, int *transferred, int32_t timeout)
+{
+ fprintf(stderr, "DEBUG: OH_BulkTransferRead enter\n");
+ USBDevicePipe usbDevicePipe = {pipe->busNum, pipe->devAddr};
+ USBEndpoint endpoint;
+ endpoint.SetInterfaceId(tpipe->bInterfaceId);
+ endpoint.SetAddr(tpipe->bEndpointAddress);
+ int32_t ret = 0;
+ int leftDataLen = length;
+ while (leftDataLen > 0) {
+ fprintf(stderr, "DEBUG: OH_BulkTransferWrite leftDataLen waiting for transfer = %d\n", leftDataLen);
+ size_t len = leftDataLen > OHUSB_ENDPOINT_MAX_LENGTH ? OHUSB_ENDPOINT_MAX_LENGTH : leftDataLen;
+ std::string sendDataStr(reinterpret_cast<char *>(data), len);
+ ret = BulkTransferWriteData(usbDevicePipe, endpoint, sendDataStr, timeout);
+ if (ret != 0) {
+ return ret;
+ }
+ fprintf(stderr, "DEBUG: OH_BulkTransferWrite transferred data len = %zu\n", len);
+ leftDataLen -= len;
+ data += len;
+ }
+ *transferred = length - leftDataLen;
+ fprintf(stderr, "DEBUG: transferred data len = %d\n", *transferred);
+ fprintf(stderr, "DEBUG: OH_BulkTransferWrite out\n");
+ return OHUSB_SUCCESS;
+}
+
+int32_t BulkTransferWriteData(
+ USBDevicePipe &usbDevicePipe, USBEndpoint &endpoint, const std::string &sendDataStr, int32_t timeout)
+{
+ std::vector<uint8_t> vectorRequestBuffer;
+ vectorRequestBuffer.assign(sendDataStr.begin(), sendDataStr.end());
+ auto &usbSrvClient = OHOS::USB::UsbSrvClient::GetInstance();
+ uint32_t retryNum = 0;
+ int32_t ret = 0;
+ do {
+ fprintf(stderr, "DEBUG: BulkTransferWriteData write data retryCout: %d\n", retryNum);
+ ret = usbSrvClient.BulkTransfer(usbDevicePipe, endpoint, vectorRequestBuffer, timeout);
+ fprintf(stderr, "DEBUG: BulkTransferWrite ret: %d\n", ret);
+ if (ret == HDF_DEV_ERR_NO_DEVICE) {
+ fprintf(stderr, "DEBUG: BulkTransferWriteData no device\n");
+ return OHUSB_ERROR_NO_DEVICE;
+ }
+ if (ret == OHUSB_ERROR_TIMEOUT) {
+ std::this_thread::sleep_for(std::chrono::milliseconds(OHUSB_BULKTRANSFER_WRITE_SLEEP));
+ retryNum++;
+ }
+ } while (ret == OHUSB_ERROR_TIMEOUT && retryNum < OHUSB_WRITE_RETRY_MAX_TIMES);
+ if (ret != 0) {
+ fprintf(stderr, "DEBUG: Write data fail\n");
+ return ret;
+ }
+ return ret;
+}
+
+int32_t OH_ControlTransferRead(
+ ohusb_pipe *pipe, ohusb_control_transfer_parameter *ctrlParam, unsigned char *data, uint16_t length)
+{
+ fprintf(stderr, "DEBUG: OH_ControlTransferRead enter\n");
+ if (pipe == nullptr || ctrlParam == nullptr) {
+ fprintf(stderr, "DEBUG: pipe or ctrlParam is nullptr\n");
+ return OHUSB_ERROR_IO;
+ }
+ fprintf(stderr, "DEBUG: OH_ControlTransferRead busNum=%d, devAddr=%d\n", pipe->busNum, pipe->devAddr);
+ USBDevicePipe usbDevicePipe = {pipe->busNum, pipe->devAddr};
+ int32_t requestType = ctrlParam->requestType;
+ int32_t request = ctrlParam->request;
+ int32_t value = ctrlParam->value;
+ int32_t index = ctrlParam->index;
+ int32_t timeOut = ctrlParam->timeout;
+ const HDI::Usb::V1_0::UsbCtrlTransfer tctrl = {requestType, request, value, index, timeOut};
+ std::vector<uint8_t> bufferData(length, 0);
+ auto &usbSrvClient = OHOS::USB::UsbSrvClient::GetInstance();
+ int32_t ret = usbSrvClient.ControlTransfer(usbDevicePipe, tctrl, bufferData);
+ if (ret != 0) {
+ fprintf(stderr, "DEBUG: OH_ControlTransferRead fail with ret = %d\n", ret);
+ return OHUSB_ERROR_IO;
+ }
+ fprintf(stderr, "DEBUG: OH_ControlTransferRead bufferData size = %zu\n", bufferData.size());
+
+ if ((value >> 8) == OHUSB_DT_STRING) {
+ int bufferLen = bufferData.size();
+ uint16_t *wbuf = new (std::nothrow) uint16_t[bufferLen + 1]();
+ if (wbuf == nullptr) {
+ fprintf(stderr, "DEBUG: OH_ControlTransferRead wbuf is nullptr.\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+ for (uint32_t i = 0; i < bufferLen - 2; ++i) {
+ wbuf[i] = bufferData[i + 2];
+ }
+ std::wstring wstr(reinterpret_cast<wchar_t *>(wbuf), (bufferLen - 2) / 2);
+ std::string buffer(wstr.begin(), wstr.end());
+ fprintf(stderr, "DEBUG: OH_ControlTransferRead buffer = %s\n", buffer.c_str());
+ if (memcpy_s(data, length, buffer.c_str(), buffer.length()) != 0) {
+ fprintf(stderr, "DEBUG: OH_ControlTransferRead memcpy_s fail.\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+ } else if (memcpy_s(data, length, bufferData.data(), bufferData.size()) != 0) {
+ fprintf(stderr, "DEBUG: OH_ControlTransferRead memcpy_s fail.\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+
+ fprintf(stderr, "DEBUG: OH_ControlTransferRead out\n");
+ return bufferData.size();
+}
+
+int32_t OH_ControlTransferWrite(
+ ohusb_pipe *pipe, ohusb_control_transfer_parameter *ctrlParam, unsigned char *data, uint16_t length)
+{
+ fprintf(stderr, "DEBUG: OH_ControlTransferWrite enter\n");
+ USBDevicePipe usbDevicePipe = {pipe->busNum, pipe->devAddr};
+ int32_t requestType = ctrlParam->requestType;
+ int32_t request = ctrlParam->request;
+ int32_t value = ctrlParam->value;
+ int32_t index = ctrlParam->index;
+ int32_t timeOut = ctrlParam->timeout;
+ const HDI::Usb::V1_0::UsbCtrlTransfer tctrl = {requestType, request, value, index, timeOut};
+ std::vector<uint8_t> bufferData(length, 0);
+ auto &usbSrvClient = OHOS::USB::UsbSrvClient::GetInstance();
+ int32_t ret = usbSrvClient.ControlTransfer(usbDevicePipe, tctrl, bufferData);
+ if (ret != 0) {
+ fprintf(stderr, "DEBUG: OH_ControlTransferWrite fail with ret = %d\n", ret);
+ return OHUSB_ERROR_IO;
+ }
+
+ fprintf(stderr, "DEBUG: OH_ControlTransferRead out\n");
+ return length;
+}
+
+int32_t OH_GetStringDescriptor(ohusb_pipe *pipe, int descId, unsigned char *descriptor, int length)
+{
+ fprintf(stderr, "DEBUG: OH_GetStringDescriptor enter\n");
+ if (descId == 0) {
+ return OHUSB_ERROR_INVALID_PARAM;
+ }
+ ohusb_control_transfer_parameter ctrlParam = {
+ OHUSB_ENDPOINT_IN,
+ OHUSB_REQUEST_GET_DESCRIPTOR,
+ (uint16_t)((OHUSB_DT_STRING << 8) | descId),
+ OHUSB_LANGUAGE_ID_ENGLISH,
+ OHUSB_GET_STRING_DESCRIPTOR_TIMEOUT
+ };
+ auto ret = OH_ControlTransferRead(pipe, &ctrlParam, descriptor, length);
+ if (ret < 0) {
+ fprintf(stderr, "DEBUG: OH_GetStringDescriptor OH_ControlTransferRead failed\n");
+ return ret;
+ }
+
+ fprintf(stderr, "DEBUG: OH_GetStringDescriptor out\n");
+ return ret;
+}
+
+int32_t ParseDeviceDescriptor(UsbDevice &usbDevice, ohusb_device_descriptor *devDesc)
+{
+ fprintf(stderr, "DEBUG: ParseDeviceDescriptor enter\n");
+ if (devDesc == nullptr) {
+ fprintf(stderr, "DEBUG: ParseDeviceDescriptor devDesc is nullptr\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+
+ devDesc->devAddr = usbDevice.GetDevAddr();
+ devDesc->busNum = usbDevice.GetBusNum();
+ devDesc->bcdUSB = usbDevice.GetbcdUSB();
+ devDesc->bDeviceClass = usbDevice.GetClass();
+ devDesc->bDeviceSubClass = usbDevice.GetSubclass();
+ devDesc->bDeviceProtocol = usbDevice.GetProtocol();
+ devDesc->bMaxPacketSize0 = usbDevice.GetbMaxPacketSize0();
+ devDesc->idVendor = usbDevice.GetVendorId();
+ devDesc->idProduct = usbDevice.GetProductId();
+ devDesc->iManufacturer = usbDevice.GetiManufacturer();
+ devDesc->iProduct = usbDevice.GetiProduct();
+ devDesc->iSerialNumber = usbDevice.GetiSerialNumber();
+ devDesc->bNumConfigurations = 0;
+ ohusb_config_descriptor *config =
+ (ohusb_config_descriptor *)calloc((size_t)usbDevice.GetConfigCount(), sizeof(ohusb_config_descriptor));
+ if (config == nullptr) {
+ fprintf(stderr, "DEBUG: ParseDeviceDescriptor config is null.\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+ devDesc->config = config;
+
+ for (int i = 0; i < usbDevice.GetConfigCount(); i++) {
+ USBConfig usbConfig;
+ usbDevice.GetConfig(i, usbConfig);
+ if (ParseConfigDescriptor(usbConfig, config + i) != OHUSB_SUCCESS) {
+ return OHUSB_ERROR_IO;
+ }
+ (devDesc->bNumConfigurations)++;
+ }
+ DumpDeviceDescriptor(devDesc);
+ fprintf(stderr, "DEBUG: ParseDeviceDescriptor out\n");
+ return OHUSB_SUCCESS;
+}
+
+int32_t ParseConfigDescriptor(USBConfig &usbConfig, ohusb_config_descriptor *confDesc)
+{
+ fprintf(stderr, "DEBUG: ParseConfigDescriptor enter\n");
+ if (confDesc == nullptr) {
+ fprintf(stderr, "DEBUG: ParseConfigDescriptor confDesc is nullptr\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+ confDesc->iConfiguration = usbConfig.GetId();
+ confDesc->bmAttributes = usbConfig.GetAttributes();
+ confDesc->MaxPower = usbConfig.GetMaxPower();
+ uint32_t interfaceCount = usbConfig.GetInterfaceCount();
+ UsbInterface usbIface;
+ usbConfig.GetInterface(interfaceCount - 1, usbIface);
+ int32_t ifaceCount = usbIface.GetId() + 1;
+ confDesc->bNumInterfaces = 0;
+ ohusb_interface *usbInterface =
+ (ohusb_interface *)calloc((size_t)ifaceCount, sizeof(ohusb_interface));
+ if (usbInterface == nullptr) {
+ fprintf(stderr, "DEBUG: ParseConfigDescriptor usbInterface is nullptr\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+ confDesc->interface = usbInterface;
+ int32_t altsettingNum = usbIface.GetAlternateSetting() + 1;
+ uint32_t usbInterfaceIndex = 0;
+ for (int32_t ifaceIndex = 0; ifaceIndex < ifaceCount; ifaceIndex++) {
+ (usbInterface + ifaceIndex)->num_altsetting = 0;
+ ohusb_interface_descriptor *altsetting =
+ (ohusb_interface_descriptor *)calloc(altsettingNum, sizeof(ohusb_interface_descriptor));
+ if (altsetting == nullptr) {
+ fprintf(stderr, "DEBUG: ParseInterfaceDescriptor altsetting is nullptr\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+ (usbInterface + ifaceIndex)->altsetting = altsetting;
+ for (int32_t altIndex = 0; altIndex < altsettingNum; altIndex++) {
+ UsbInterface tempUsbInterface;
+ usbConfig.GetInterface(usbInterfaceIndex++, tempUsbInterface);
+ if (ParseInterfaceDescriptor(tempUsbInterface, altsetting + altIndex) != OHUSB_SUCCESS) {
+ return OHUSB_ERROR_IO;
+ }
+ ((usbInterface + ifaceIndex)->num_altsetting)++;
+ }
+ (confDesc->bNumInterfaces)++;
+ }
+ DumpConfigDescriptor(confDesc);
+ fprintf(stderr, "DEBUG: ParseConfigDescriptor out\n");
+ return OHUSB_SUCCESS;
+}
+
+int32_t ParseInterfaceDescriptor(UsbInterface &usbInterface, ohusb_interface_descriptor *ifaceDesc)
+{
+ fprintf(stderr, "DEBUG: ParseInterfaceDescriptor enter\n");
+ if (ifaceDesc == nullptr) {
+ fprintf(stderr, "DEBUG: ParseInterfaceDescriptor ifaceDesc is nullptr\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+ ifaceDesc->bInterfaceNumber = usbInterface.GetId();
+ ifaceDesc->bAlternateSetting = usbInterface.GetAlternateSetting();
+ ifaceDesc->bInterfaceClass = usbInterface.GetClass();
+ ifaceDesc->bInterfaceSubClass = usbInterface.GetSubClass();
+ ifaceDesc->bInterfaceProtocol = usbInterface.GetProtocol();
+ ifaceDesc->bNumEndpoints = 0;
+ fprintf(stderr, "DEBUG: ParseInterfaceDescriptor class=%x, subclass=%x, protocol=%x.\n",
+ usbInterface.GetClass(), usbInterface.GetSubClass(), usbInterface.GetProtocol());
+ ohusb_endpoint_descriptor *endpoint;
+ endpoint = (ohusb_endpoint_descriptor *)
+ calloc((size_t)usbInterface.GetEndpointCount(), sizeof(ohusb_endpoint_descriptor));
+ if (endpoint == nullptr) {
+ fprintf(stderr, "DEBUG: endpoint is null.\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+ ifaceDesc->endpoint = endpoint;
+ std::vector<USBEndpoint> endpoints = usbInterface.GetEndpoints();
+ for (int i = 0; i < usbInterface.GetEndpointCount(); i++) {
+ if (ParseEndpointDescriptor(endpoints[i], endpoint + i) != OHUSB_SUCCESS) {
+ return OHUSB_ERROR_IO;
+ }
+ (ifaceDesc->bNumEndpoints)++;
+ }
+ DumpInterfaceDescriptor(ifaceDesc);
+ fprintf(stderr, "DEBUG: ParseInterfaceDescriptor out\n");
+ return OHUSB_SUCCESS;
+}
+
+int32_t ParseEndpointDescriptor(USBEndpoint &usbEndpoint, ohusb_endpoint_descriptor *epDesc)
+{
+ fprintf(stderr, "DEBUG: ParseEndpointDescriptor enter\n");
+ if (epDesc == nullptr) {
+ fprintf(stderr, "DEBUG: ParseEndpointDescriptor epDesc is nullptr\n");
+ return OHUSB_ERROR_NO_MEM;
+ }
+ epDesc->bDescriptorType = usbEndpoint.GetType();
+ epDesc->bEndpointAddress = usbEndpoint.GetAddress();
+ epDesc->bmAttributes = usbEndpoint.GetAttributes();
+ epDesc->wMaxPacketSize = usbEndpoint.GetMaxPacketSize();
+ epDesc->bInterval = usbEndpoint.GetInterval();
+ epDesc->bInterfaceId = usbEndpoint.GetInterfaceId();
+ epDesc->direction = usbEndpoint.GetDirection();
+ DumpEndpointDescriptor(epDesc);
+ fprintf(stderr, "DEBUG: ParseEndpointDescriptor out\n");
+ return OHUSB_SUCCESS;
+}
+
+int32_t OH_SetConfiguration(ohusb_pipe *pipe, int configIndex)
+{
+ fprintf(stderr, "DEBUG: OH_SetConfiguration enter\n");
+ auto &usbSrvClient = OHOS::USB::UsbSrvClient::GetInstance();
+ USBDevicePipe usbDevicePipe = {pipe->busNum, pipe->devAddr};
+ USBConfig usbConfig;
+ usbConfig.SetId(configIndex);
+ int32_t ret = usbSrvClient.SetConfiguration(usbDevicePipe, usbConfig);
+ if (ret != ERR_OK) {
+ fprintf(stderr, "DEBUG: OH_SetConfiguration fail with ret = %d\n", ret);
+ return OHUSB_ERROR_BUSY;
+ }
+ fprintf(stderr, "DEBUG: OH_SetConfiguration out\n");
+ return OHUSB_SUCCESS;
+}
+
+int32_t OH_SetInterface(ohusb_pipe *pipe, int interfaceId, int altIndex)
+{
+ fprintf(stderr, "DEBUG: OH_SetInterface enter\n");
+ auto &usbSrvClient = OHOS::USB::UsbSrvClient::GetInstance();
+ USBDevicePipe usbDevicePipe = {pipe->busNum, pipe->devAddr};
+ UsbInterface usbInterface;
+ usbInterface.SetId(interfaceId);
+ usbInterface.SetAlternateSetting(altIndex);
+ int32_t ret = usbSrvClient.SetInterface(usbDevicePipe, usbInterface);
+ if (ret != ERR_OK) {
+ fprintf(stderr, "DEBUG: OH_SetInterface fail with ret = %d\n", ret);
+ return OHUSB_ERROR_BUSY;
+ }
+ fprintf(stderr, "DEBUG: OH_SetInterface out\n");
+ return OHUSB_SUCCESS;
+}
+
+void ReleaseInterfaceDescriptor(ohusb_interface_descriptor *ifaceDesc)
+{
+ if (ifaceDesc != nullptr) {
+ SAFE_DELETE_ARRAY(ifaceDesc->endpoint);
+ ifaceDesc->bNumEndpoints = 0;
+ SAFE_DELETE_ARRAY(ifaceDesc);
+ }
+}
+
+void ReleaseInterface(ohusb_interface *iface)
+{
+ if (iface != nullptr) {
+ for (uint8_t i = 0; i < iface->num_altsetting; i++) {
+ ReleaseInterfaceDescriptor((iface->altsetting) + i);
+ }
+ iface->num_altsetting = 0;
+ SAFE_DELETE_ARRAY(iface);
+ }
+}
+
+void ReleaseConfigDescriptor(ohusb_config_descriptor *confDesc)
+{
+ if (confDesc != nullptr) {
+ for (uint8_t i = 0; i < confDesc->bNumInterfaces; i++) {
+ ReleaseInterface((confDesc->interface) + i);
+ }
+ confDesc->bNumInterfaces = 0;
+ SAFE_DELETE_ARRAY(confDesc);
+ }
+}
+
+void ReleaseDeviceDescriptor(ohusb_device_descriptor *devDesc)
+{
+ if (devDesc != nullptr) {
+ for (uint8_t i = 0; i < devDesc->bNumConfigurations; i++) {
+ ReleaseConfigDescriptor((devDesc->config) + i);
+ }
+ devDesc->bNumConfigurations = 0;
+ SAFE_DELETE_ARRAY(devDesc);
+ }
+}
+
+void DumpDeviceDescriptor(ohusb_device_descriptor *devDesc)
+{
+ fprintf(stderr, "DEBUG: ------------------begin DeviceDescriptor------------------\n");
+ fprintf(stderr, "DEBUG: busNum = %x\n", devDesc->busNum);
+ fprintf(stderr, "DEBUG: devAddr = %x\n", devDesc->devAddr);
+ fprintf(stderr, "DEBUG: bcdUSB = %d\n", devDesc->bcdUSB);
+ fprintf(stderr, "DEBUG: bDeviceClass = %x\n", devDesc->bDeviceClass);
+ fprintf(stderr, "DEBUG: bDeviceSubClass = %x\n", devDesc->bDeviceSubClass);
+ fprintf(stderr, "DEBUG: bDeviceProtocol = %x\n", devDesc->bDeviceProtocol);
+ fprintf(stderr, "DEBUG: bMaxPacketSize0 = %x\n", devDesc->bMaxPacketSize0);
+ fprintf(stderr, "DEBUG: idVendor = %d\n", devDesc->idVendor);
+ fprintf(stderr, "DEBUG: idProduct = %d\n", devDesc->idProduct);
+ fprintf(stderr, "DEBUG: bcdDevice = %d\n", devDesc->bcdDevice);
+ fprintf(stderr, "DEBUG: iManufacturer = %x\n", devDesc->iManufacturer);
+ fprintf(stderr, "DEBUG: iProduct = %x\n", devDesc->iProduct);
+ fprintf(stderr, "DEBUG: iSerialNumber = %x\n", devDesc->iSerialNumber);
+ fprintf(stderr, "DEBUG: bNumConfigurations = %x\n", devDesc->bNumConfigurations);
+ fprintf(stderr, "DEBUG: ------------------end DeviceDescriptor------------------\n");
+ return;
+}
+
+void DumpConfigDescriptor(ohusb_config_descriptor *confDesc)
+{
+ fprintf(stderr, "DEBUG: ------------------begin ConfigDescriptor------------------\n");
+ fprintf(stderr, "DEBUG: iConfiguration = %x\n", confDesc->iConfiguration);
+ fprintf(stderr, "DEBUG: bmAttributes = %x\n", confDesc->bmAttributes);
+ fprintf(stderr, "DEBUG: MaxPower = %x\n", confDesc->MaxPower);
+ fprintf(stderr, "DEBUG: bNumInterfaces = %x\n", confDesc->bNumInterfaces);
+ fprintf(stderr, "DEBUG: ------------------end ConfigDescriptor------------------\n");
+ return;
+}
+
+void DumpInterfaceDescriptor(ohusb_interface_descriptor *ifaceDesc)
+{
+ fprintf(stderr, "DEBUG: ------------------begin InterfaceDescriptor------------------\n");
+ fprintf(stderr, "DEBUG: bInterfaceNumber = %x\n", ifaceDesc->bInterfaceNumber);
+ fprintf(stderr, "DEBUG: bAlternateSetting = %x\n", ifaceDesc->bAlternateSetting);
+ fprintf(stderr, "DEBUG: bInterfaceClass = %x\n", ifaceDesc->bInterfaceClass);
+ fprintf(stderr, "DEBUG: bInterfaceSubClass = %x\n", ifaceDesc->bInterfaceSubClass);
+ fprintf(stderr, "DEBUG: bInterfaceProtocol = %x\n", ifaceDesc->bInterfaceProtocol);
+ fprintf(stderr, "DEBUG: bNumEndpoints = %x\n", ifaceDesc->bNumEndpoints);
+ fprintf(stderr, "DEBUG: ------------------end InterfaceDescriptor------------------\n");
+ return;
+}
+
+void DumpEndpointDescriptor(ohusb_endpoint_descriptor *eptDesc)
+{
+ fprintf(stderr, "DEBUG: ------------------begin EndpointDescriptor------------------\n");
+ fprintf(stderr, "DEBUG: bDescriptorType = %x\n", eptDesc->bDescriptorType);
+ fprintf(stderr, "DEBUG: bEndpointAddress = %x\n", eptDesc->bEndpointAddress);
+ fprintf(stderr, "DEBUG: bmAttributes = %x\n", eptDesc->bmAttributes);
+ fprintf(stderr, "DEBUG: wMaxPacketSize = %d\n", eptDesc->wMaxPacketSize);
+ fprintf(stderr, "DEBUG: bInterval = %x\n", eptDesc->bInterval);
+ fprintf(stderr, "DEBUG: bInterfaceId = %x\n", eptDesc->bInterfaceId);
+ fprintf(stderr, "DEBUG: direction = %d\n", eptDesc->direction);
+ fprintf(stderr, "DEBUG: ------------------end EndpointDescriptor------------------\n");
+ return;
+}
+
+char *CopyString(const std::string &source)
+{
+ auto len = source.length();
+ char *dest = new (std::nothrow) char[len + 1];
+ if (dest == nullptr) {
+ fprintf(stderr, "DEBUG: CopyString allocate failed\n");
+ return nullptr;
+ }
+ if (strcpy_s(dest, len + 1, source.c_str()) != 0) {
+ fprintf(stderr, "DEBUG: CopyString strcpy_s failed\n");
+ }
+ dest[len] = '\0';
+ return dest;
+}
\ No newline at end of file
diff --git a/backend/usb_manager.h b/backend/usb_manager.h
new file mode 100644
index 0000000..cb29f74
--- /dev/null
+++ b/backend/usb_manager.h
@@ -0,0 +1,465 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef USB_MANAGER_H
+#define USB_MANAGER_H
+
+#include <cups/string-private.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdbool.h>
+
+#define OHUSB_TRANSFER_TYPE_MASK 0x03 /* in bmAttributes */
+#define OHUSB_ENDPOINT_DIR_MASK 0x80
+
+const int OHUSB_CLASS_PRINTER = 7;
+const uint16_t OHUSB_LANGUAGE_ID_ENGLISH = 0x409;
+const int32_t OHUSB_GET_STRING_DESCRIPTOR_TIMEOUT = 1000;
+const int32_t OHUSB_STRING_DESCRIPTOR_LENGTH_INDEX = 0;
+
+const int32_t OHUSB_READ_RETRY_MAX_TIMES = 200;
+const int32_t OHUSB_READ_INTERVAL = 50;
+const int32_t OHUSB_ENDPOINT_MAX_LENGTH = 512;
+const int32_t OHUSB_BULKTRANSFER_WRITE_SLEEP = 1000;
+const int32_t OHUSB_WRITE_RETRY_MAX_TIMES = 20;
+const int32_t OHUSB_BULKTRANSFER_READ_TIMEOUT = 5000;
+
+/*
+ * Transfer type
+ */
+typedef enum {
+ /** Control transfer */
+ OHUSB_TRANSFER_TYPE_CONTROL = 0U,
+
+ /** Isochronous transfer */
+ OHUSB_TRANSFER_TYPE_ISOCHRONOUS = 1U,
+
+ /** Bulk transfer */
+ OHUSB_TRANSFER_TYPE_BULK = 2U,
+
+ /** Interrupt transfer */
+ OHUSB_TRANSFER_TYPE_INTERRUPT = 3U,
+
+ /** Bulk stream transfer */
+ OHUSB_TRANSFER_TYPE_BULK_STREAM = 4U
+} ohusb_transfer_type;
+
+/*
+ * Request type bits.
+ */
+typedef enum {
+ /** Standard */
+ OHUSB_REQUEST_TYPE_STANDARD = (0x00 << 5),
+
+ /** Class */
+ OHUSB_REQUEST_TYPE_CLASS = (0x01 << 5),
+
+ /** Vendor */
+ OHUSB_REQUEST_TYPE_VENDOR = (0x02 << 5),
+
+ /** Reserved */
+ OHUSB_REQUEST_TYPE_RESERVED = (0x03 << 5)
+} ohusb_request_type;
+
+/*
+ * Endpoint direction.
+ */
+typedef enum {
+ /** Out: host-to-device */
+ OHUSB_ENDPOINT_OUT = 0x00,
+
+ /** In: device-to-host */
+ OHUSB_ENDPOINT_IN = 0x80
+} ohusb_endpoint_direction;
+
+/*
+ * Recipient bits of the requestType.
+ */
+typedef enum {
+ /** Device */
+ OHUSB_RECIPIENT_DEVICE = 0x00,
+
+ /** Interface */
+ OHUSB_RECIPIENT_INTERFACE = 0x01,
+
+ /** Endpoint */
+ OHUSB_RECIPIENT_ENDPOINT = 0x02,
+
+ /** Other */
+ OHUSB_RECIPIENT_OTHER = 0x03
+} ohusb_request_recipient;
+
+/*
+ * Standard requests
+ */
+typedef enum {
+ /** Request status of the specific recipient */
+ OHUSB_REQUEST_GET_STATUS = 0x00,
+
+ /** Clear or disable a specific feature */
+ OHUSB_REQUEST_CLEAR_FEATURE = 0x01,
+
+ /* 0x02 is reserved */
+
+ /** Set or enable a specific feature */
+ OHUSB_REQUEST_SET_FEATURE = 0x03,
+
+ /* 0x04 is reserved */
+
+ /** Set device address for all future accesses */
+ OHUSB_REQUEST_SET_ADDRESS = 0x05,
+
+ /** Get the specified descriptor */
+ OHUSB_REQUEST_GET_DESCRIPTOR = 0x06,
+
+ /** Used to update existing descriptors or add new descriptors */
+ OHUSB_REQUEST_SET_DESCRIPTOR = 0x07,
+
+ /** Get the current device configuration value */
+ OHUSB_REQUEST_GET_CONFIGURATION = 0x08,
+
+ /** Set device configuration */
+ OHUSB_REQUEST_SET_CONFIGURATION = 0x09,
+
+ /** Return the selected alternate setting for the specified interface */
+ OHUSB_REQUEST_GET_INTERFACE = 0x0a,
+
+ /** Select an alternate interface for the specified interface */
+ OHUSB_REQUEST_SET_INTERFACE = 0x0b,
+
+ /** Set then report an endpoint's synchronization frame */
+ OHUSB_REQUEST_SYNCH_FRAME = 0x0c,
+
+ /** Sets both the U1 and U2 Exit Latency */
+ OHUSB_REQUEST_SET_SEL = 0x30,
+
+ /** Delay from the time a host transmits a packet to the time it is
+ * received by the device. */
+ OHUSB_SET_ISOCH_DELAY = 0x31
+} ohusb_standard_request;
+
+/*
+ * Descriptor types as defined by the USB specification.
+ */
+typedef enum {
+ /** Device descriptor */
+ OHUSB_DT_DEVICE = 0x01,
+
+ /** Configuration descriptor */
+ OHUSB_DT_CONFIG = 0x02,
+
+ /** String descriptor */
+ OHUSB_DT_STRING = 0x03,
+
+ /** Interface descriptor */
+ OHUSB_DT_INTERFACE = 0x04,
+
+ /** Endpoint descriptor */
+ OHUSB_DT_ENDPOINT = 0x05,
+
+ /** Interface Association Descriptor */
+ OHUSB_DT_INTERFACE_ASSOCIATION = 0x0b,
+
+ /** BOS descriptor */
+ OHUSB_DT_BOS = 0x0f,
+
+ /** Device Capability descriptor */
+ OHUSB_DT_DEVICE_CAPABILITY = 0x10,
+
+ /** HID descriptor */
+ OHUSB_DT_HID = 0x21,
+
+ /** HID report descriptor */
+ OHUSB_DT_REPORT = 0x22,
+
+ /** Physical descriptor */
+ OHUSB_DT_PHYSICAL = 0x23,
+
+ /** Hub descriptor */
+ OHUSB_DT_HUB = 0x29,
+
+ /** SuperSpeed Hub descriptor */
+ OHUSB_DT_SUPERSPEED_HUB = 0x2a,
+
+ /** SuperSpeed Endpoint Companion descriptor */
+ OHUSB_DT_SS_ENDPOINT_COMPANION = 0x30
+} ohusb_descriptor_type;
+
+/**
+ * Error codes.
+ */
+typedef enum {
+ /** Success (no error) */
+ OHUSB_SUCCESS = 0,
+
+ /** Input/output error */
+ OHUSB_ERROR_IO = -1,
+
+ /** Invalid parameter */
+ OHUSB_ERROR_INVALID_PARAM = -2,
+
+ /** Access denied (insufficient permissions) */
+ OHUSB_ERROR_ACCESS = -3,
+
+ /** No such device (it may have been disconnected) */
+ OHUSB_ERROR_NO_DEVICE = -4,
+
+ /** Entity not found */
+ OHUSB_ERROR_NOT_FOUND = -5,
+
+ /** Resource busy */
+ OHUSB_ERROR_BUSY = -6,
+
+ /** Operation timed out */
+ OHUSB_ERROR_TIMEOUT = -7,
+
+ /** Overflow */
+ OHUSB_ERROR_OVERFLOW = -8,
+
+ /** Pipe error */
+ OHUSB_ERROR_PIPE = -9,
+
+ /** System call interrupted (perhaps due to signal) */
+ OHUSB_ERROR_INTERRUPTED = -10,
+
+ /** Insufficient memory */
+ OHUSB_ERROR_NO_MEM = -11,
+
+ /** Operation not supported or unimplemented on this platform */
+ OHUSB_ERROR_NOT_SUPPORTED = -12,
+
+ /** Other error */
+ OHUSB_ERROR_OTHER = -99
+} ohusb_error;
+
+/**
+ * A structure representing the parameter for usb control transfer.
+ */
+typedef struct {
+ /** Request type */
+ int32_t requestType;
+
+ /** Request */
+ int32_t request;
+
+ /** Value. Varies according to request */
+ int32_t value;
+
+ /** Index. Varies according to request, typically used to pass an index
+ * or offset */
+ int32_t index;
+
+ /** timeout */
+ int32_t timeout;
+} ohusb_control_transfer_parameter;
+
+/**
+ * A structure representing the standard USB endpoint descriptor.
+ */
+typedef struct {
+ /** Descriptor type */
+ uint8_t bDescriptorType;
+
+ /** The address of the endpoint described by this descriptor. Bits 0:3 are
+ * the endpoint number. Bits 4:6 are reserved. Bit 7 indicates direction. */
+ uint8_t bEndpointAddress;
+
+ /** Attributes which apply to the endpoint when it is configured using
+ * the bConfigurationValue. Bits 0:1 determine the transfer type. Bits 2:3 are
+ * only used for isochronous endpoints. Bits 4:5 are also only used for
+ * isochronous endpoints . Bits 6:7 are reserved. */
+ uint8_t bmAttributes;
+
+ /** Maximum packet size this endpoint is capable of sending/receiving. */
+ uint16_t wMaxPacketSize;
+
+ /** Interval for polling endpoint for data transfers. */
+ uint8_t bInterval;
+
+ /** The interface id the endpoint belongs to. */
+ uint8_t bInterfaceId;
+
+ /** The direction of the endpoint. */
+ uint32_t direction;
+} ohusb_endpoint_descriptor;
+
+/**
+ * A structure representing the standard USB interface descriptor.
+ */
+typedef struct {
+ /** Number of this interface */
+ uint8_t bInterfaceNumber;
+
+ /** Value used to select this alternate setting for this interface */
+ uint8_t bAlternateSetting;
+
+ /** USB-IF class code for this interface. */
+ uint8_t bInterfaceClass;
+
+ /** USB-IF subclass code for this interface, qualified by the
+ * bInterfaceClass value */
+ uint8_t bInterfaceSubClass;
+
+ /** USB-IF protocol code for this interface, qualified by the
+ * bInterfaceClass and bInterfaceSubClass values */
+ uint8_t bInterfaceProtocol;
+
+ /** Array of endpoint descriptors. This length of this array is determined
+ * by the bNumEndpoints field. */
+ ohusb_endpoint_descriptor *endpoint;
+
+ /** Number of endpoints used by this interface (excluding the control
+ * endpoint). */
+ uint8_t bNumEndpoints;
+} ohusb_interface_descriptor;
+
+/**
+ * A collection of alternate settings for a particular USB interface.
+ */
+typedef struct {
+ /** Array of interface descriptors. The length of this array is determined
+ * by the num_altsetting field. */
+ ohusb_interface_descriptor *altsetting;
+
+ /** The number of alternate settings that belong to this interface.
+ * Must be non-negative. */
+ int num_altsetting;
+} ohusb_interface;
+
+/**
+ * A structure representing the standard USB configuration descriptor.
+ */
+typedef struct {
+ /** Identifier value for this configuration */
+ uint8_t iConfiguration;
+
+ /** Configuration characteristics */
+ uint8_t bmAttributes;
+
+ /** Maximum power consumption of the USB device from this bus in this
+ * configuration when the device is fully operation. Expressed in units
+ * of 2 mA when the device is operating in high-speed mode and in units
+ * of 8 mA when the device is operating in super-speed mode. */
+ uint8_t MaxPower;
+
+ /** Array of interfaces supported by this configuration. The length of
+ * this array is determined by the bNumInterfaces field. */
+ ohusb_interface *interface;
+
+ /** Number of interfaces supported by this configuration */
+ uint8_t bNumInterfaces;
+} ohusb_config_descriptor;
+
+/**
+ * A structure representing the standard USB device descriptor.
+ */
+typedef struct {
+ /** The bus num of the usb device. */
+ uint8_t busNum;
+
+ /** The device address of the usb device. */
+ uint8_t devAddr;
+
+ /** USB specification release number in binary-coded decimal. A value of
+ * 0x0200 indicates USB 2.0, 0x0110 indicates USB 1.1, etc. */
+ uint16_t bcdUSB;
+
+ /** USB-IF class code for the device. */
+ uint8_t bDeviceClass;
+
+ /** USB-IF subclass code for the device, qualified by the bDeviceClass
+ * value */
+ uint8_t bDeviceSubClass;
+
+ /** USB-IF protocol code for the device, qualified by the bDeviceClass and
+ * bDeviceSubClass values */
+ uint8_t bDeviceProtocol;
+
+ /** Maximum packet size for endpoint 0 */
+ uint8_t bMaxPacketSize0;
+
+ /** USB-IF vendor ID */
+ uint16_t idVendor;
+
+ /** USB-IF product ID */
+ uint16_t idProduct;
+
+ /** Device release number in binary-coded decimal */
+ uint16_t bcdDevice;
+
+ /** Index of string descriptor describing manufacturer */
+ uint8_t iManufacturer;
+
+ /** Index of string descriptor describing product */
+ uint8_t iProduct;
+
+ /** Index of string descriptor containing device serial number */
+ uint8_t iSerialNumber;
+
+ /** Array of configs supported by this device. The length of
+ * this array is determined by the bNumConfigurations field. */
+ ohusb_config_descriptor *config;
+
+ /** Number of configs supported by this device */
+ uint8_t bNumConfigurations;
+} ohusb_device_descriptor;
+
+/**
+ * A structure representing the pipe information to transfer data.
+ */
+typedef struct {
+ /** The bus num of the usb device. */
+ uint8_t busNum;
+
+ /** The device address of the usb device. */
+ uint8_t devAddr;
+} ohusb_pipe;
+
+/**
+ * A structure representing the endpoint information to transfer data.
+ */
+typedef struct {
+ /** The interface id to which the endpoint to transmit data belongs. */
+ uint8_t bInterfaceId;
+
+ /** The endpoint address to transfer data. */
+ uint8_t bEndpointAddress;
+} ohusb_transfer_pipe;
+
+extern int32_t OH_GetDevices(ohusb_device_descriptor** list, ssize_t *numdevs);
+extern int32_t OH_OpenDevice(ohusb_device_descriptor *devDesc, ohusb_pipe **pipe);
+extern int32_t OH_CloseDevice(ohusb_pipe *pipe);
+extern int32_t OH_ClaimInterface(ohusb_pipe *pipe, int interfaceId, bool force);
+extern int32_t OH_ReleaseInterface(ohusb_pipe *pipe, int interfaceId);
+extern int32_t OH_BulkTransferRead(
+ ohusb_pipe *pipe, ohusb_transfer_pipe *tpipe, unsigned char *data, int length, int *transferred);
+extern int32_t OH_BulkTransferWrite(
+ ohusb_pipe *pipe, ohusb_transfer_pipe *tpipe, unsigned char *data, int length, int *transferred, int32_t timeout);
+extern int32_t OH_ControlTransferRead(
+ ohusb_pipe *pipe, ohusb_control_transfer_parameter *ctrlParam, unsigned char *data, uint16_t length);
+extern int32_t OH_ControlTransferWrite(
+ ohusb_pipe *pipe, ohusb_control_transfer_parameter *ctrlParam, unsigned char *data, uint16_t length);
+extern int32_t OH_GetStringDescriptor(ohusb_pipe *pipe, int descId, unsigned char *descriptor, int length);
+extern int32_t OH_SetConfiguration(ohusb_pipe *pipe, int configIndex);
+extern int32_t OH_SetInterface(ohusb_pipe *pipe, int interfaceId, int altIndex);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif /* USB_MANAGER_H */
\ No newline at end of file
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