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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/usb_service/usb_device.h"
#include <algorithm>
#include "base/stl_util.h"
#include "components/usb_service/usb_context.h"
#include "components/usb_service/usb_device_handle.h"
#include "content/public/browser/browser_thread.h"
#include "third_party/libusb/src/libusb/libusb.h"
#if defined(OS_CHROMEOS)
#include "base/sys_info.h"
#include "chromeos/dbus/dbus_thread_manager.h"
#include "chromeos/dbus/permission_broker_client.h"
#endif // defined(OS_CHROMEOS)
using content::BrowserThread;
namespace {
#if defined(OS_CHROMEOS)
void OnRequestUsbAccessReplied(
const base::Callback<void(bool success)>& callback,
bool success) {
BrowserThread::PostTask(
BrowserThread::FILE, FROM_HERE, base::Bind(callback, success));
}
#endif // defined(OS_CHROMEOS)
} // namespace
namespace usb_service {
UsbDevice::UsbDevice(scoped_refptr<UsbContext> context,
PlatformUsbDevice platform_device,
uint16 vendor_id,
uint16 product_id,
uint32 unique_id)
: platform_device_(platform_device),
vendor_id_(vendor_id),
product_id_(product_id),
unique_id_(unique_id),
context_(context) {
CHECK(platform_device) << "platform_device cannot be NULL";
libusb_ref_device(platform_device);
}
UsbDevice::UsbDevice()
: platform_device_(NULL),
vendor_id_(0),
product_id_(0),
unique_id_(0),
context_(NULL) {
}
UsbDevice::~UsbDevice() {
DCHECK(thread_checker_.CalledOnValidThread());
for (HandlesVector::iterator it = handles_.begin(); it != handles_.end();
++it) {
(*it)->InternalClose();
}
STLClearObject(&handles_);
libusb_unref_device(platform_device_);
}
#if defined(OS_CHROMEOS)
void UsbDevice::RequestUsbAcess(
int interface_id,
const base::Callback<void(bool success)>& callback) {
DCHECK(thread_checker_.CalledOnValidThread());
// ChromeOS builds on non-ChromeOS machines (dev) should not attempt to
// use permission broker.
if (base::SysInfo::IsRunningOnChromeOS()) {
chromeos::PermissionBrokerClient* client =
chromeos::DBusThreadManager::Get()->GetPermissionBrokerClient();
DCHECK(client) << "Could not get permission broker client.";
if (!client) {
callback.Run(false);
return;
}
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&chromeos::PermissionBrokerClient::RequestUsbAccess,
base::Unretained(client),
this->vendor_id_,
this->product_id_,
interface_id,
base::Bind(&OnRequestUsbAccessReplied, callback)));
}
}
#endif
scoped_refptr<UsbDeviceHandle> UsbDevice::Open() {
DCHECK(thread_checker_.CalledOnValidThread());
PlatformUsbDeviceHandle handle;
int rv = libusb_open(platform_device_, &handle);
if (LIBUSB_SUCCESS == rv) {
scoped_refptr<UsbConfigDescriptor> interfaces = ListInterfaces();
if (!interfaces)
return NULL;
scoped_refptr<UsbDeviceHandle> device_handle =
new UsbDeviceHandle(context_, this, handle, interfaces);
handles_.push_back(device_handle);
return device_handle;
}
return NULL;
}
bool UsbDevice::Close(scoped_refptr<UsbDeviceHandle> handle) {
DCHECK(thread_checker_.CalledOnValidThread());
for (HandlesVector::iterator it = handles_.begin(); it != handles_.end();
++it) {
if (*it == handle) {
(*it)->InternalClose();
handles_.erase(it);
return true;
}
}
return false;
}
scoped_refptr<UsbConfigDescriptor> UsbDevice::ListInterfaces() {
DCHECK(thread_checker_.CalledOnValidThread());
PlatformUsbConfigDescriptor platform_config;
const int list_result =
libusb_get_active_config_descriptor(platform_device_, &platform_config);
if (list_result == 0)
return new UsbConfigDescriptor(platform_config);
return NULL;
}
void UsbDevice::OnDisconnect() {
DCHECK(thread_checker_.CalledOnValidThread());
HandlesVector handles;
swap(handles, handles_);
for (std::vector<scoped_refptr<UsbDeviceHandle> >::iterator it =
handles.begin();
it != handles.end();
++it) {
(*it)->InternalClose();
}
}
} // namespace usb_service
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