1 files changed, 95 insertions, 0 deletions
diff --git a/third_party/libwebrtc/sdk/objc/native/src/objc_network_monitor.mm b/third_party/libwebrtc/sdk/objc/native/src/objc_network_monitor.mm
new file mode 100644
index 0000000000..535548c64c
--- /dev/null
+++ b/third_party/libwebrtc/sdk/objc/native/src/objc_network_monitor.mm
@@ -0,0 +1,95 @@
+/*
+ *  Copyright 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "sdk/objc/native/src/objc_network_monitor.h"
+#include "absl/strings/string_view.h"
+
+#include <algorithm>
+
+#include "rtc_base/logging.h"
+#include "rtc_base/string_utils.h"
+
+namespace webrtc {
+
+rtc::NetworkMonitorInterface* ObjCNetworkMonitorFactory::CreateNetworkMonitor(
+    const FieldTrialsView& field_trials) {
+  return new ObjCNetworkMonitor();
+}
+
+ObjCNetworkMonitor::ObjCNetworkMonitor() {
+  safety_flag_ = PendingTaskSafetyFlag::Create();
+}
+
+ObjCNetworkMonitor::~ObjCNetworkMonitor() {
+  [network_monitor_ stop];
+  network_monitor_ = nil;
+}
+
+void ObjCNetworkMonitor::Start() {
+  if (started_) {
+    return;
+  }
+  thread_ = rtc::Thread::Current();
+  RTC_DCHECK_RUN_ON(thread_);
+  safety_flag_->SetAlive();
+  network_monitor_ = [[RTCNetworkMonitor alloc] initWithObserver:this];
+  if (network_monitor_ == nil) {
+    RTC_LOG(LS_WARNING) << "Failed to create RTCNetworkMonitor; not available on this OS?";
+  }
+  started_ = true;
+}
+
+void ObjCNetworkMonitor::Stop() {
+  RTC_DCHECK_RUN_ON(thread_);
+  if (!started_) {
+    return;
+  }
+  safety_flag_->SetNotAlive();
+  [network_monitor_ stop];
+  network_monitor_ = nil;
+  started_ = false;
+}
+
+rtc::NetworkMonitorInterface::InterfaceInfo ObjCNetworkMonitor::GetInterfaceInfo(
+    absl::string_view interface_name) {
+  RTC_DCHECK_RUN_ON(thread_);
+  if (adapter_type_by_name_.empty()) {
+    // If we have no path update, assume everything's available, because it's
+    // preferable for WebRTC to try all interfaces rather than none at all.
+    return {
+        .adapter_type = rtc::ADAPTER_TYPE_UNKNOWN,
+        .available = true,
+    };
+  }
+  auto iter = adapter_type_by_name_.find(interface_name);
+  if (iter == adapter_type_by_name_.end()) {
+    return {
+        .adapter_type = rtc::ADAPTER_TYPE_UNKNOWN,
+        .available = false,
+    };
+  }
+
+  return {
+      .adapter_type = iter->second,
+      .available = true,
+  };
+}
+
+void ObjCNetworkMonitor::OnPathUpdate(
+    std::map<std::string, rtc::AdapterType, rtc::AbslStringViewCmp> adapter_type_by_name) {
+  RTC_DCHECK(network_monitor_ != nil);
+  thread_->PostTask(SafeTask(safety_flag_, [this, adapter_type_by_name] {
+    RTC_DCHECK_RUN_ON(thread_);
+    adapter_type_by_name_ = adapter_type_by_name;
+    InvokeNetworksChangedCallback();
+  }));
+}
+
+}  // namespace webrtc