1 files changed, 159 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/fake_network.h b/third_party/libwebrtc/rtc_base/fake_network.h
new file mode 100644
index 0000000000..4501c9a964
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/fake_network.h
@@ -0,0 +1,159 @@
+/*
+ *  Copyright 2009 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.
+ */
+
+#ifndef RTC_BASE_FAKE_NETWORK_H_
+#define RTC_BASE_FAKE_NETWORK_H_
+
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "absl/memory/memory.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/mdns_responder_interface.h"
+#include "rtc_base/message_handler.h"
+#include "rtc_base/network.h"
+#include "rtc_base/socket_address.h"
+#include "rtc_base/string_encode.h"
+#include "rtc_base/thread.h"
+
+namespace rtc {
+
+const int kFakeIPv4NetworkPrefixLength = 24;
+const int kFakeIPv6NetworkPrefixLength = 64;
+
+// Fake network manager that allows us to manually specify the IPs to use.
+class FakeNetworkManager : public NetworkManagerBase,
+                           public MessageHandlerAutoCleanup {
+ public:
+  FakeNetworkManager() {}
+
+  struct Iface {
+    SocketAddress socket_address;
+    AdapterType adapter_type;
+    absl::optional<AdapterType> underlying_vpn_adapter_type;
+  };
+  typedef std::vector<Iface> IfaceList;
+
+  void AddInterface(const SocketAddress& iface) {
+    // Ensure a unique name for the interface if its name is not given.
+    AddInterface(iface, "test" + rtc::ToString(next_index_++));
+  }
+
+  void AddInterface(const SocketAddress& iface, absl::string_view if_name) {
+    AddInterface(iface, if_name, ADAPTER_TYPE_UNKNOWN);
+  }
+
+  void AddInterface(
+      const SocketAddress& iface,
+      absl::string_view if_name,
+      AdapterType type,
+      absl::optional<AdapterType> underlying_vpn_adapter_type = absl::nullopt) {
+    SocketAddress address(if_name, 0);
+    address.SetResolvedIP(iface.ipaddr());
+    ifaces_.push_back({address, type, underlying_vpn_adapter_type});
+    DoUpdateNetworks();
+  }
+
+  void RemoveInterface(const SocketAddress& iface) {
+    for (IfaceList::iterator it = ifaces_.begin(); it != ifaces_.end(); ++it) {
+      if (it->socket_address.EqualIPs(iface)) {
+        ifaces_.erase(it);
+        break;
+      }
+    }
+    DoUpdateNetworks();
+  }
+
+  void StartUpdating() override {
+    ++start_count_;
+    if (start_count_ == 1) {
+      sent_first_update_ = false;
+      rtc::Thread::Current()->Post(RTC_FROM_HERE, this, kUpdateNetworksMessage);
+    } else {
+      if (sent_first_update_) {
+        rtc::Thread::Current()->Post(RTC_FROM_HERE, this,
+                                     kSignalNetworksMessage);
+      }
+    }
+  }
+
+  void StopUpdating() override { --start_count_; }
+
+  // MessageHandler interface.
+  void OnMessage(Message* msg) override {
+    if (msg->message_id == kUpdateNetworksMessage) {
+      DoUpdateNetworks();
+    } else if (msg->message_id == kSignalNetworksMessage) {
+      SignalNetworksChanged();
+    } else {
+      RTC_CHECK(false);
+    }
+  }
+
+  using NetworkManagerBase::set_default_local_addresses;
+  using NetworkManagerBase::set_enumeration_permission;
+
+  // rtc::NetworkManager override.
+  webrtc::MdnsResponderInterface* GetMdnsResponder() const override {
+    return mdns_responder_.get();
+  }
+
+  void set_mdns_responder(
+      std::unique_ptr<webrtc::MdnsResponderInterface> mdns_responder) {
+    mdns_responder_ = std::move(mdns_responder);
+  }
+
+ private:
+  void DoUpdateNetworks() {
+    if (start_count_ == 0)
+      return;
+    std::vector<std::unique_ptr<Network>> networks;
+    for (IfaceList::iterator it = ifaces_.begin(); it != ifaces_.end(); ++it) {
+      int prefix_length = 0;
+      if (it->socket_address.ipaddr().family() == AF_INET) {
+        prefix_length = kFakeIPv4NetworkPrefixLength;
+      } else if (it->socket_address.ipaddr().family() == AF_INET6) {
+        prefix_length = kFakeIPv6NetworkPrefixLength;
+      }
+      IPAddress prefix = TruncateIP(it->socket_address.ipaddr(), prefix_length);
+      auto net = std::make_unique<Network>(
+          it->socket_address.hostname(), it->socket_address.hostname(), prefix,
+          prefix_length, it->adapter_type, /*field_trials=*/nullptr);
+      if (it->underlying_vpn_adapter_type.has_value()) {
+        net->set_underlying_type_for_vpn(*it->underlying_vpn_adapter_type);
+      }
+      net->set_default_local_address_provider(this);
+      net->AddIP(it->socket_address.ipaddr());
+      networks.push_back(std::move(net));
+    }
+    bool changed;
+    MergeNetworkList(std::move(networks), &changed);
+    if (changed || !sent_first_update_) {
+      SignalNetworksChanged();
+      sent_first_update_ = true;
+    }
+  }
+
+  IfaceList ifaces_;
+  int next_index_ = 0;
+  int start_count_ = 0;
+  bool sent_first_update_ = false;
+
+  static constexpr uint32_t kUpdateNetworksMessage = 1;
+  static constexpr uint32_t kSignalNetworksMessage = 2;
+
+  std::unique_ptr<webrtc::MdnsResponderInterface> mdns_responder_;
+};
+
+}  // namespace rtc
+
+#endif  // RTC_BASE_FAKE_NETWORK_H_