API for connection type (Ethernet/WIFI/WWAN ...) in NetworkChangeNotifier.

net/base/network_change_notifier_mac.cc

 // Copyright (c) 2012 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 "net/base/network_change_notifier_mac.h"
 
 #include <netinet/in.h>
 #include <resolv.h>
 
 #include "base/basictypes.h"
@@ skipping 28 matching lines @@
     watcher_.CleanUp();
   }
 
  private:
   internal::DnsConfigWatcher watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsWatcherThread);
 };
 
 NetworkChangeNotifierMac::NetworkChangeNotifierMac()
-    : online_state_(UNINITIALIZED),
-      initial_state_cv_(&online_state_lock_),
+    : connection_type_(CONNECTION_UNKNOWN),
+      connection_type_initialized_(false),
+      initial_connection_type_cv_(&connection_type_lock_),
       forwarder_(this),
       dns_watcher_thread_(new DnsWatcherThread()) {
   // Must be initialized after the rest of this object, as it may call back into
-  // SetInitialState().
+  // SetInitialConnectionType().
   config_watcher_.reset(new NetworkConfigWatcherMac(&forwarder_));
   dns_watcher_thread_->StartWithOptions(
       base::Thread::Options(MessageLoop::TYPE_IO, 0));
 }
 
 NetworkChangeNotifierMac::~NetworkChangeNotifierMac() {
   // Delete the ConfigWatcher to join the notifier thread, ensuring that
   // StartReachabilityNotifications() has an opportunity to run to completion.
   config_watcher_.reset();
 
   // Now that StartReachabilityNotifications() has either run to completion or
   // never run at all, unschedule reachability_ if it was previously scheduled.
   if (reachability_.get() && run_loop_.get()) {
     SCNetworkReachabilityUnscheduleFromRunLoop(reachability_.get(),
                                                run_loop_.get(),
                                                kCFRunLoopCommonModes);
   }
 }
 
-bool NetworkChangeNotifierMac::IsCurrentlyOffline() const {
-  base::AutoLock lock(online_state_lock_);
-  // Make sure the initial state is set before returning.
-  while (online_state_ == UNINITIALIZED) {
-    initial_state_cv_.Wait();
+NetworkChangeNotifier::ConnectionType
+NetworkChangeNotifierMac::GetCurrentConnectionType() const {
+  base::AutoLock lock(connection_type_lock_);
+  // Make sure the initial connection type is set before returning.
+  while (!connection_type_initialized_) {
+    initial_connection_type_cv_.Wait();
   }
-  return online_state_ == OFFLINE;
+  return connection_type_;
 }
 
-void NetworkChangeNotifierMac::SetInitialState() {
+void NetworkChangeNotifierMac::SetInitialConnectionType() {
   // Called on notifier thread.
 
   // Try to reach 0.0.0.0. This is the approach taken by Firefox:
   //
   // http://mxr.mozilla.org/mozilla2.0/source/netwerk/system/mac/nsNetworkLinkService.mm
   //
   // From my (adamk) testing on Snow Leopard, 0.0.0.0
   // seems to be reachable if any network connection is available.
   struct sockaddr_in addr = {0};
   addr.sin_len = sizeof(addr);
   addr.sin_family = AF_INET;
   reachability_.reset(SCNetworkReachabilityCreateWithAddress(
       kCFAllocatorDefault, reinterpret_cast<struct sockaddr*>(&addr)));
 
   SCNetworkConnectionFlags flags;
   bool reachable = true;
   if (SCNetworkReachabilityGetFlags(reachability_, &flags))
     reachable = CalculateReachability(flags);
   else
-    LOG(ERROR) << "Could not get initial network state, assuming online.";
+    LOG(ERROR) << "Could not get initial network connection type,"
+               << "assuming online.";
   {
-    base::AutoLock lock(online_state_lock_);
-    online_state_ = reachable ? ONLINE : OFFLINE;
-    initial_state_cv_.Signal();
+    base::AutoLock lock(connection_type_lock_);
+    // TODO(droger): Get something more detailed than CONNECTION_UNKNOWN.
+    connection_type_ = reachable ? CONNECTION_UNKNOWN : CONNECTION_NONE;
+    connection_type_initialized_ = true;
+    initial_connection_type_cv_.Signal();
   }
 }
 
 void NetworkChangeNotifierMac::StartReachabilityNotifications() {
   // Called on notifier thread.
   run_loop_.reset(CFRunLoopGetCurrent());
   CFRetain(run_loop_.get());
 
   DCHECK(reachability_);
   SCNetworkReachabilityContext reachability_context = {
@@ skipping 62 matching lines @@
 // static
 void NetworkChangeNotifierMac::ReachabilityCallback(
     SCNetworkReachabilityRef target,
     SCNetworkConnectionFlags flags,
     void* notifier) {
   NetworkChangeNotifierMac* notifier_mac =
       static_cast<NetworkChangeNotifierMac*>(notifier);
 
   DCHECK_EQ(notifier_mac->run_loop_.get(), CFRunLoopGetCurrent());
 
-  OnlineState new_state = CalculateReachability(flags) ? ONLINE : OFFLINE;
-  OnlineState old_state;
+  // TODO(droger): Get something more detailed than CONNECTION_UNKNOWN.
+  ConnectionType new_type = CalculateReachability(flags) ? CONNECTION_UNKNOWN
+                                                         : CONNECTION_NONE;
+  ConnectionType old_type;
   {
-    base::AutoLock lock(notifier_mac->online_state_lock_);
-    old_state = notifier_mac->online_state_;
-    notifier_mac->online_state_ = new_state;
+    base::AutoLock lock(notifier_mac->connection_type_lock_);
+    old_type = notifier_mac->connection_type_;
+    notifier_mac->connection_type_ = new_type;
   }
-  if (old_state != new_state)
-    NotifyObserversOfOnlineStateChange();
+  if (old_type != new_type)
+    NotifyObserversOfConnectionTypeChange();
 }
 
 }  // namespace net