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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_ASH_COMPONENTS_DBUS_USB_USBGUARD_OBSERVER_H_
#define CHROMEOS_ASH_COMPONENTS_DBUS_USB_USBGUARD_OBSERVER_H_
#include <unistd.h>
#include <map>
#include <string>
#include "base/component_export.h"
#include "base/observer_list_types.h"
namespace ash {
class COMPONENT_EXPORT(USB_CLIENT) UsbguardObserver
: public base::CheckedObserver {
public:
// Based on usbguard src/Library/public/usbguard/Rule.hpp "enum class Target".
// We should only see either kAllow or kBlock.
enum class Target {
kAllow = 0,
kBlock = 1,
kReject = 2,
kMatch = 3,
kUnknown = 4,
kDevice = 5,
kEmpty = 6,
kInvalid = 7,
};
// A signal fired by usbguard-daemon whenever a USB device has been connected
// after the resulting policy has been determined.
//
// Parameters
// |target_old| represents the state of the device before applying the policy
// rules. Typically, this is kBlock except for signals emitted as part of
// the usbguard-daemon service starting up.
// |target_new| represents the state of the device after applying policy
// rules.
// |device_rule| is a string representation of the usbguard rule that matches
// the device.
// |attributes| has key-value pairs with information about the device. Keys
// that can be expected include:
// "hash" - A hash of the USB device descriptors for example
// "9hMkYEMPjuNegGmzLIKwUp2MPctSL0tCWk7ruWGuOzc="
// "id" - The VID:PID for example "0781:5588"
// "name" - The text name of the device such as "USB Extreme Pro"
// "parent-hash" a hash the parent device's USB descriptors
// "serial" a serial number string that is often blank and doesn't have a
// reliable pattern.
// "via-port" the port number the device is connected to such as "2-1.1.3"
// "with-interface" a list of USB interfaces. Each interface includes the
// class, subclass, and protocol numbers used to bind an interface to a
// driver for example "08:06:50".
virtual void DevicePolicyChanged(
uint32_t id,
Target target_old,
Target target_new,
const std::string& device_rule,
uint32_t rule_id,
const std::map<std::string, std::string>& attributes) = 0;
};
} // namespace ash
#endif // CHROMEOS_ASH_COMPONENTS_DBUS_USB_USBGUARD_OBSERVER_H_
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