blob: cb776359e0093bc1a076dc64b5fdf338e0d2459e [file] [log] [blame]
// Copyright 2015 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 "chromeos/components/proximity_auth/metrics.h"
#include <stdint.h>
#include <algorithm>
#include "base/hash/md5.h"
#include "base/logging.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/stl_util.h"
#include "base/sys_byteorder.h"
namespace proximity_auth {
namespace metrics {
namespace {
// Converts the 4-byte prefix of an MD5 hash into a int32_t value.
int32_t DigestToInt32(const base::MD5Digest& digest) {
// First, copy to a uint32_t, since byte swapping and endianness conversions
// expect unsigned integers.
uint32_t unsigned_value;
DCHECK_GE(base::size(digest.a), sizeof(unsigned_value));
memcpy(&unsigned_value, digest.a, sizeof(unsigned_value));
unsigned_value = base::ByteSwap(base::HostToNet32(unsigned_value));
// Then copy the resulting bit pattern to an int32_t to match the datatype
// that histograms expect.
int32_t value;
memcpy(&value, &unsigned_value, sizeof(value));
return value;
// Returns a hash of the given |name|, encoded as a 32-bit signed integer.
int32_t HashDeviceModelName(const std::string& name) {
base::MD5Digest digest;
base::MD5Sum(name.c_str(), name.size(), &digest);
return DigestToInt32(digest);
} // namespace
const char kUnknownDeviceModel[] = "Unknown";
const int kUnknownProximityValue = 127;
void RecordAuthProximityRollingRssi(int rolling_rssi) {
if (rolling_rssi != kUnknownProximityValue)
rolling_rssi = std::min(50, std::max(-100, rolling_rssi));
void RecordAuthProximityRemoteDeviceModelHash(const std::string& device_model) {
void RecordRemoteSecuritySettingsState(RemoteSecuritySettingsState state) {
DCHECK(state < RemoteSecuritySettingsState::COUNT);
"EasyUnlock.RemoteLockScreenState", static_cast<int>(state),
} // namespace metrics
} // namespace proximity_auth