mirror of
https://github.com/klzgrad/naiveproxy.git
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276 lines
9.0 KiB
C++
276 lines
9.0 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/base/network_config_watcher_mac.h"
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#include <algorithm>
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#include "base/bind.h"
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#include "base/compiler_specific.h"
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#include "base/macros.h"
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#include "base/memory/weak_ptr.h"
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#include "base/message_loop/message_loop.h"
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#include "base/metrics/histogram_macros.h"
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#include "base/single_thread_task_runner.h"
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#include "base/threading/thread.h"
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#include "base/threading/thread_restrictions.h"
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#include "build/build_config.h"
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namespace net {
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namespace {
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// SCDynamicStore API does not exist on iOS.
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#if !defined(OS_IOS)
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const base::TimeDelta kRetryInterval = base::TimeDelta::FromSeconds(1);
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const int kMaxRetry = 5;
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// Maps SCError to an enum for UMA logging. These values are persisted to logs,
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// and should not be renumbered. Added to investigate https://crbug.com/547877.
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enum class SCStatusCode {
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// Unmapped error codes.
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SC_UNKNOWN = 0,
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// These map to the corresponding SCError.
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SC_OK = 1,
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SC_FAILED = 2,
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SC_INVALID_ARGUMENT = 3,
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SC_ACCESS_ERROR = 4,
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SC_NO_KEY = 5,
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SC_KEY_EXISTS = 6,
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SC_LOCKED = 7,
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SC_NEED_LOCK = 8,
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SC_NO_STORE_SESSION = 9,
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SC_NO_STORE_SERVER = 10,
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SC_NOTIFIER_ACTIVE = 11,
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SC_NO_PREFS_SESSION = 12,
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SC_PREFS_BUSY = 13,
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SC_NO_CONFIG_FILE = 14,
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SC_NO_LINK = 15,
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SC_STALE = 16,
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SC_MAX_LINK = 17,
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SC_REACHABILITY_UNKNOWN = 18,
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SC_CONNECTION_NO_SERVICE = 19,
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SC_CONNECTION_IGNORE = 20,
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// Maximum value for histogram bucket.
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SC_COUNT,
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};
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SCStatusCode ConvertToSCStatusCode(int sc_error) {
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switch (sc_error) {
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case kSCStatusOK:
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return SCStatusCode::SC_OK;
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case kSCStatusFailed:
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return SCStatusCode::SC_FAILED;
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case kSCStatusInvalidArgument:
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return SCStatusCode::SC_INVALID_ARGUMENT;
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case kSCStatusAccessError:
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return SCStatusCode::SC_ACCESS_ERROR;
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case kSCStatusNoKey:
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return SCStatusCode::SC_NO_KEY;
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case kSCStatusKeyExists:
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return SCStatusCode::SC_KEY_EXISTS;
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case kSCStatusLocked:
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return SCStatusCode::SC_LOCKED;
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case kSCStatusNeedLock:
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return SCStatusCode::SC_NEED_LOCK;
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case kSCStatusNoStoreSession:
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return SCStatusCode::SC_NO_STORE_SESSION;
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case kSCStatusNoStoreServer:
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return SCStatusCode::SC_NO_STORE_SERVER;
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case kSCStatusNotifierActive:
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return SCStatusCode::SC_NOTIFIER_ACTIVE;
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case kSCStatusNoPrefsSession:
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return SCStatusCode::SC_NO_PREFS_SESSION;
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case kSCStatusPrefsBusy:
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return SCStatusCode::SC_PREFS_BUSY;
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case kSCStatusNoConfigFile:
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return SCStatusCode::SC_NO_CONFIG_FILE;
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case kSCStatusNoLink:
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return SCStatusCode::SC_NO_LINK;
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case kSCStatusStale:
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return SCStatusCode::SC_STALE;
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case kSCStatusMaxLink:
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return SCStatusCode::SC_MAX_LINK;
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case kSCStatusReachabilityUnknown:
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return SCStatusCode::SC_REACHABILITY_UNKNOWN;
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case kSCStatusConnectionNoService:
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return SCStatusCode::SC_CONNECTION_NO_SERVICE;
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case kSCStatusConnectionIgnore:
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return SCStatusCode::SC_CONNECTION_IGNORE;
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default:
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return SCStatusCode::SC_UNKNOWN;
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}
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}
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// Called back by OS. Calls OnNetworkConfigChange().
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void DynamicStoreCallback(SCDynamicStoreRef /* store */,
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CFArrayRef changed_keys,
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void* config_delegate) {
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NetworkConfigWatcherMac::Delegate* net_config_delegate =
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static_cast<NetworkConfigWatcherMac::Delegate*>(config_delegate);
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net_config_delegate->OnNetworkConfigChange(changed_keys);
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}
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#endif // !defined(OS_IOS)
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class NetworkConfigWatcherMacThread : public base::Thread {
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public:
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NetworkConfigWatcherMacThread(NetworkConfigWatcherMac::Delegate* delegate);
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~NetworkConfigWatcherMacThread() override;
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protected:
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// base::Thread
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void Init() override;
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void CleanUp() override;
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private:
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// The SystemConfiguration calls in this function can lead to contention early
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// on, so we invoke this function later on in startup to keep it fast.
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void InitNotifications();
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// Returns whether initializing notifications has succeeded.
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bool InitNotificationsHelper();
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base::ScopedCFTypeRef<CFRunLoopSourceRef> run_loop_source_;
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NetworkConfigWatcherMac::Delegate* const delegate_;
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#if !defined(OS_IOS)
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int num_retry_;
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#endif // !defined(OS_IOS)
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base::WeakPtrFactory<NetworkConfigWatcherMacThread> weak_factory_;
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DISALLOW_COPY_AND_ASSIGN(NetworkConfigWatcherMacThread);
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};
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NetworkConfigWatcherMacThread::NetworkConfigWatcherMacThread(
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NetworkConfigWatcherMac::Delegate* delegate)
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: base::Thread("NetworkConfigWatcher"),
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delegate_(delegate),
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#if !defined(OS_IOS)
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num_retry_(0),
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#endif // !defined(OS_IOS)
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weak_factory_(this) {
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}
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NetworkConfigWatcherMacThread::~NetworkConfigWatcherMacThread() {
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// Allow IO because Stop() calls PlatformThread::Join(), which is a blocking
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// operation. This is expected during shutdown.
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base::ThreadRestrictions::ScopedAllowIO allow_io;
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Stop();
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}
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void NetworkConfigWatcherMacThread::Init() {
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base::ThreadRestrictions::SetIOAllowed(true);
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delegate_->Init();
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// TODO(willchan): Look to see if there's a better signal for when it's ok to
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// initialize this, rather than just delaying it by a fixed time.
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const base::TimeDelta kInitializationDelay = base::TimeDelta::FromSeconds(1);
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task_runner()->PostDelayedTask(
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FROM_HERE, base::Bind(&NetworkConfigWatcherMacThread::InitNotifications,
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weak_factory_.GetWeakPtr()),
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kInitializationDelay);
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}
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void NetworkConfigWatcherMacThread::CleanUp() {
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if (!run_loop_source_.get())
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return;
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CFRunLoopRemoveSource(CFRunLoopGetCurrent(), run_loop_source_.get(),
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kCFRunLoopCommonModes);
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run_loop_source_.reset();
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}
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void NetworkConfigWatcherMacThread::InitNotifications() {
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// If initialization fails, retry after a 1s delay.
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bool success = InitNotificationsHelper();
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#if !defined(OS_IOS)
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if (!success && num_retry_ < kMaxRetry) {
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LOG(ERROR) << "Retrying SystemConfiguration registration in 1 second.";
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task_runner()->PostDelayedTask(
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FROM_HERE,
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base::BindOnce(&NetworkConfigWatcherMacThread::InitNotifications,
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weak_factory_.GetWeakPtr()),
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kRetryInterval);
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num_retry_++;
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return;
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}
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// There are kMaxRetry + 2 buckets. The 0 bucket is where no retry is
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// performed. The kMaxRetry + 1 bucket is where all retries have failed.
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int histogram_bucket = num_retry_;
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if (!success) {
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DCHECK_EQ(kMaxRetry, num_retry_);
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histogram_bucket = kMaxRetry + 1;
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}
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UMA_HISTOGRAM_EXACT_LINEAR(
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"Net.NetworkConfigWatcherMac.SCDynamicStore.NumRetry", histogram_bucket,
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kMaxRetry + 2);
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#else
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DCHECK(success);
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#endif // !defined(OS_IOS)
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}
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bool NetworkConfigWatcherMacThread::InitNotificationsHelper() {
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#if !defined(OS_IOS)
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// SCDynamicStore API does not exist on iOS.
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// Add a run loop source for a dynamic store to the current run loop.
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SCDynamicStoreContext context = {
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0, // Version 0.
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delegate_, // User data.
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NULL, // This is not reference counted. No retain function.
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NULL, // This is not reference counted. No release function.
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NULL, // No description for this.
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};
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base::ScopedCFTypeRef<SCDynamicStoreRef> store(SCDynamicStoreCreate(
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NULL, CFSTR("org.chromium"), DynamicStoreCallback, &context));
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if (!store) {
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int error = SCError();
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LOG(ERROR) << "SCDynamicStoreCreate failed with Error: " << error << " - "
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<< SCErrorString(error);
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UMA_HISTOGRAM_ENUMERATION(
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"Net.NetworkConfigWatcherMac.SCDynamicStore.Create",
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ConvertToSCStatusCode(error), SCStatusCode::SC_COUNT);
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return false;
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}
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run_loop_source_.reset(SCDynamicStoreCreateRunLoopSource(
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NULL, store.get(), 0));
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if (!run_loop_source_) {
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int error = SCError();
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LOG(ERROR) << "SCDynamicStoreCreateRunLoopSource failed with Error: "
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<< error << " - " << SCErrorString(error);
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UMA_HISTOGRAM_ENUMERATION(
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"Net.NetworkConfigWatcherMac.SCDynamicStore.Create.RunLoopSource",
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ConvertToSCStatusCode(error), SCStatusCode::SC_COUNT);
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return false;
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}
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CFRunLoopAddSource(CFRunLoopGetCurrent(), run_loop_source_.get(),
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kCFRunLoopCommonModes);
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#endif // !defined(OS_IOS)
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// Set up notifications for interface and IP address changes.
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delegate_->StartReachabilityNotifications();
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#if !defined(OS_IOS)
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delegate_->SetDynamicStoreNotificationKeys(store.get());
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#endif // !defined(OS_IOS)
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return true;
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}
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} // namespace
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NetworkConfigWatcherMac::NetworkConfigWatcherMac(Delegate* delegate)
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: notifier_thread_(new NetworkConfigWatcherMacThread(delegate)) {
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// We create this notifier thread because the notification implementation
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// needs a thread with a CFRunLoop, and there's no guarantee that
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// MessageLoopCurrent::Get() meets that criterion.
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base::Thread::Options thread_options(base::MessageLoop::TYPE_UI, 0);
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notifier_thread_->StartWithOptions(thread_options);
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}
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NetworkConfigWatcherMac::~NetworkConfigWatcherMac() {}
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} // namespace net
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