Merge "Add stub code to read MS OS 2.0 descriptors." (c8eadff1) · Commits · e / os / android_system_core

adb/tools/check_ms_os_desc.cpp

+46 −1

Original line number	Original line	Diff line number	Diff line
	@@ -158,6 +158,49 @@ static void check_ms_os_desc_v1(libusb_device_handle* device_handle, const std::
	errx(1, "failed to find v1 MS OS descriptor specifying WinUSB for device %s", serial.c_str());		errx(1, "failed to find v1 MS OS descriptor specifying WinUSB for device %s", serial.c_str());
	}		}

			static void check_ms_os_desc_v2(libusb_device_handle* device_handle, const std::string& serial) {
			libusb_bos_descriptor* bos;
			int rc = libusb_get_bos_descriptor(device_handle, &bos);

			if (rc != 0) {
			fprintf(stderr, "failed to get bos descriptor for device %s\n", serial.c_str());
			return;
			}

			for (size_t i = 0; i < bos->bNumDeviceCaps; ++i) {
			libusb_bos_dev_capability_descriptor* desc = bos->dev_capability[i];
			if (desc->bDescriptorType != LIBUSB_DT_DEVICE_CAPABILITY) {
			errx(1, "invalid BOS descriptor type: %d", desc->bDescriptorType);
			}

			if (desc->bDevCapabilityType != 0x05 /* PLATFORM */) {
			fprintf(stderr, "skipping non-platform dev capability: %#02x\n",
			desc->bDevCapabilityType);
			continue;
			}

			if (desc->bLength < sizeof(*desc) + 16) {
			errx(1, "received device capability descriptor not long enough to contain a UUID?");
			}

			char uuid[16];
			memcpy(uuid, desc->dev_capability_data, 16);

			constexpr uint8_t ms_os_uuid[16] = {0xD8, 0xDD, 0x60, 0xDF, 0x45, 0x89, 0x4C, 0xC7,
			0x9C, 0xD2, 0x65, 0x9D, 0x9E, 0x64, 0x8A, 0x9F};
			if (memcmp(uuid, ms_os_uuid, 16) != 0) {
			fprintf(stderr, "skipping unknown UUID\n");
			continue;
			}

			size_t data_length = desc->bLength - sizeof(*desc) - 16;
			fprintf(stderr, "found MS OS 2.0 descriptor, length = %zu\n", data_length);

			// Linux does not appear to support MS OS 2.0 Descriptors.
			// TODO: If and when it does, verify that we're emitting them properly.
			}
			}

	int main(int argc, char** argv) {		int main(int argc, char** argv) {
	libusb_context* ctx;		libusb_context* ctx;
	if (libusb_init(&ctx) != 0) {		if (libusb_init(&ctx) != 0) {
	@@ -208,8 +251,10 @@ int main(int argc, char** argv) {
	check_ms_os_desc_v1(device_handle, *serial);		check_ms_os_desc_v1(device_handle, *serial);
	fprintf(stderr, "found v1 OS descriptor for device %s\n", serial->c_str());		fprintf(stderr, "found v1 OS descriptor for device %s\n", serial->c_str());

	// TODO: Read BOS for MS OS Descriptor 2.0 descriptors:		// Read BOS for MS OS Descriptor 2.0 descriptors:
	// http://download.microsoft.com/download/3/5/6/3563ED4A-F318-4B66-A181-AB1D8F6FD42D/MS_OS_2_0_desc.docx		// http://download.microsoft.com/download/3/5/6/3563ED4A-F318-4B66-A181-AB1D8F6FD42D/MS_OS_2_0_desc.docx
			fprintf(stderr, "fetching v2 OS descriptor from device %s\n", serial->c_str());
			check_ms_os_desc_v2(device_handle, *serial);

	found = true;		found = true;
	}		}