adb设备，根据serial获取vid pid

使用adb devices命令，可以轻松获取到所有连接到PC的adb设备的serial值。

但是adb命令无法获取adb usb设备的vendor id和product id。

本程序根据adb协议，遍历usb设备，使用ioctrl获取serial和vid，pid，这样可以将serial和vid pid匹配起来。

Windows版本的实现可以根据adb_api.h实现，但是有一个问题，adb的服务会独占adb设备，如果adb服务正在运行，那么，这个实现是无法兑现功能的。

谁有好的办法，欢迎共享。Linux平台则无此限制。

下面提供Linux平台的实现，Windows的实现，因为受限于adb服务独占设备，就不贴出来了，谁有兴趣的，可以问我要代码。

具体Linux实现参见代码：

 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
 
 #include <unistd.h>
 #include <sys/ioctl.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <dirent.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <ctype.h>
 
 #include <linux/usbdevice_fs.h>
 #include <linux/version.h>
 #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 20)
 #include <linux/usb/ch9.h>
 #else
 #include <linux/usb_ch9.h>
 #endif
 #include <asm/byteorder.h>
 
 #define ADB_CLASS              0xff
 #define ADB_SUBCLASS           0x42
 #define ADB_PROTOCOL           0x1
 
 #include <string>
 #include <vector>
 
 typedef struct tag_devpath {
     int serial_index;
     std::string adb_dev_path;
 }ADB_DEV;
 
 std::vector<ADB_DEV> va;
 
 inline int badname(const char *name)
 {
     while(*name) {
         if(!isdigit(*name++)) return ;
     }
     return ;
 }
 
 int is_adb_interface(int usb_class, int usb_subclass, int usb_protocol)
 {
     if (usb_class == ADB_CLASS && usb_subclass == ADB_SUBCLASS &&
             usb_protocol == ADB_PROTOCOL) {
         return ;
     }   
 
     return ;
 }
 
 int get_serial()
 {
     for(int i = ; i < va.size(); ++i)
     {
         int fd = open(va[i].adb_dev_path.c_str(), O_RDWR);
         if(fd > )
         {
             char serial[];
             int n = ;
             int serial_index = va[i].serial_index;
             serial[] = ;
             memset(serial, , n);
             if (serial_index) {
                 struct usbdevfs_ctrltransfer  ctrl;
                 __u16 buffer[];
                 __u16 languages[];
                 int i, result;
                 int languageCount = ;
 
                 memset(languages, , sizeof(languages));
                 memset(&ctrl, , sizeof(ctrl));
 
                 // read list of supported languages
                 ctrl.bRequestType = USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE;
                 ctrl.bRequest = USB_REQ_GET_DESCRIPTOR;
                 ctrl.wValue = (USB_DT_STRING << ) | ;
                 ctrl.wIndex = ;
                 ctrl.wLength = sizeof(languages);
                 ctrl.data = languages;
                 ctrl.timeout = ;
 
                 result = ioctl(fd, USBDEVFS_CONTROL, &ctrl);
                 if (result > )
                     languageCount = (result - ) / ;
                 else if(result < )
                     printf("ioctl failed: %s\n", strerror(errno));
 
                 printf("languageCount = %d\n", languageCount);
                 for (i = ; i <= languageCount; i++) {
                     memset(buffer, , sizeof(buffer));
                     memset(&ctrl, , sizeof(ctrl));
 
                     ctrl.bRequestType = USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE;
                     ctrl.bRequest = USB_REQ_GET_DESCRIPTOR;
                     ctrl.wValue = (USB_DT_STRING << ) | serial_index;
                     ctrl.wIndex = __le16_to_cpu(languages[i]);
                     ctrl.wLength = sizeof(buffer);
                     ctrl.data = buffer;
                     ctrl.timeout = ;
 
                     result = ioctl(fd, USBDEVFS_CONTROL, &ctrl);
                     if (result > ) {
                         int i;
                         // skip first word, and copy the rest to the serial string, changing shorts to bytes.
                         result /= ;
                         for (i = ; i < result; i++)
                             serial[i - ] = __le16_to_cpu(buffer[i]);
                         serial[i - ] = ;
                         printf("serial: %s\n", serial);
                         break;
                     }
                     else if(result < )
                     {
                         printf("ioctl failed: %s\n", strerror(errno));
                     }
                 }
             }
         }
         else
         {
             printf("open %s failed: %s", va[i].adb_dev_path.c_str(), strerror(errno));
         }
     }
 
     return ;
 }
 
 void find_usb_device(void)
 {
     const char* base = "/dev/bus/usb";
     char busname[], devname[];
     DIR *busdir , *devdir ;
     struct dirent *de;
     int fd ;
 
     busdir = opendir(base);
     if(busdir == ) return;
 
     va.clear();
 
     while((de = readdir(busdir)) != ) {
         if(badname(de->d_name)) continue;
 
         snprintf(busname, sizeof busname, "%s/%s", base, de->d_name);
         devdir = opendir(busname);
         if(devdir == ) continue;
 
         while((de = readdir(devdir))) {
             unsigned char devdesc[];
             unsigned char* bufptr = devdesc;
             unsigned char* bufend;
             struct usb_device_descriptor* device;
             struct usb_config_descriptor* config;
             struct usb_interface_descriptor* interface;
             struct usb_endpoint_descriptor *ep1, *ep2;
             unsigned zero_mask = ;
             unsigned vid, pid;
             size_t desclength;
 
             if(badname(de->d_name)) continue;
             snprintf(devname, sizeof devname, "%s/%s", busname, de->d_name);
 
             if((fd = open(devname, O_RDONLY)) < ) {
                 continue;
             }
 
             desclength = read(fd, devdesc, sizeof(devdesc));
             bufend = bufptr + desclength;
 
             // should have device and configuration descriptors, and atleast two endpoints
             if (desclength < USB_DT_DEVICE_SIZE + USB_DT_CONFIG_SIZE) {
                 close(fd);
                 continue;
             }
 
             device = (struct usb_device_descriptor*)bufptr;
             bufptr += USB_DT_DEVICE_SIZE;
 
             if((device->bLength != USB_DT_DEVICE_SIZE) || (device->bDescriptorType != USB_DT_DEVICE)) {
                 close(fd);
                 continue;
             }
 
             vid = device->idVendor;
             pid = device->idProduct;
 
             config = (struct usb_config_descriptor *)bufptr;
             bufptr += USB_DT_CONFIG_SIZE;
             if (config->bLength != USB_DT_CONFIG_SIZE || config->bDescriptorType != USB_DT_CONFIG) {
                 close(fd);
                 continue;
             }
 
                 // loop through all the descriptors and look for the ADB interface
             while (bufptr < bufend) {
                 unsigned char length = bufptr[];
                 unsigned char type = bufptr[];
 
                 if (type == USB_DT_INTERFACE) {
                     interface = (struct usb_interface_descriptor *)bufptr;
                     bufptr += length;
 
                     if (length != USB_DT_INTERFACE_SIZE) {
                         break;
                     }
 
                     if (is_adb_interface(interface->bInterfaceClass,
                             interface->bInterfaceSubClass, interface->bInterfaceProtocol))  {
 
                         ADB_DEV ad;
                         ad.serial_index = device->iSerialNumber;
                         ad.adb_dev_path = devname;
                         va.push_back(ad);
 
                         //get devname vendor_id product_id
                         printf("get:\ndevname = %s\nidVendor=0x%x idProduct=0x%x\n",
                                 devname, vid, pid);
 
                         break;
                     }
                 } else {
                     bufptr += length;
                 }
             } // end of while
 
             close(fd);
         } // end of devdir while
         closedir(devdir);
     } //end of busdir while
     closedir(busdir);
 }
 
 int main(void)
 {
     find_usb_device();
     for(int i = ; i < va.size(); ++i)
     {
         printf("dev:%s ===> serial index: %d\n", va[i].adb_dev_path.c_str(), va[i].serial_index);
     }
 
     get_serial();
 
     return ;
 }