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/*
* 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 <optional>
#include <string>
#include <utility>
#include <vector>
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "api/scoped_refptr.h"
#include "api/sequence_checker.h"
#include "api/task_queue/pending_task_safety_flag.h"
#include "rtc_base/ip_address.h"
#include "rtc_base/mdns_responder_interface.h"
#include "rtc_base/net_helpers.h"
#include "rtc_base/network.h"
#include "rtc_base/network_constants.h"
#include "rtc_base/socket_address.h"
#include "rtc_base/thread.h"
namespace webrtc {
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:
explicit FakeNetworkManager(Thread* network_thread)
: network_thread_(network_thread) {}
~FakeNetworkManager() override {
if (network_thread_) {
network_thread_->BlockingCall([this]() {
if (safety_flag_) {
safety_flag_->SetNotAlive();
safety_flag_ = nullptr;
}
});
}
}
struct Iface {
SocketAddress socket_address;
AdapterType adapter_type;
std::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" + absl::StrCat(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,
std::optional<AdapterType> underlying_vpn_adapter_type = std::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 {
RTC_DCHECK_RUN_ON(network_thread_);
if (!safety_flag_) {
safety_flag_ = PendingTaskSafetyFlag::Create();
}
++start_count_;
if (start_count_ == 1) {
sent_first_update_ = false;
network_thread_->PostTask(
SafeTask(safety_flag_, [this] { DoUpdateNetworks(); }));
} else if (sent_first_update_) {
network_thread_->PostTask(
SafeTask(safety_flag_, [this] { SignalNetworksChanged(); }));
}
}
void StopUpdating() override { --start_count_; }
using NetworkManagerBase::set_default_local_addresses;
using NetworkManagerBase::set_enumeration_permission;
// NetworkManager override.
MdnsResponderInterface* GetMdnsResponder() const override {
return mdns_responder_.get();
}
void set_mdns_responder(
std::unique_ptr<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);
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;
}
}
Thread* const network_thread_;
scoped_refptr<PendingTaskSafetyFlag> safety_flag_;
IfaceList ifaces_;
int next_index_ = 0;
int start_count_ = 0;
bool sent_first_update_ = false;
std::unique_ptr<MdnsResponderInterface> mdns_responder_;
};
} // namespace webrtc
// Re-export symbols from the webrtc namespace for backwards compatibility.
// TODO(bugs.webrtc.org/4222596): Remove once all references are updated.
#ifdef WEBRTC_ALLOW_DEPRECATED_NAMESPACES
namespace rtc {
using ::webrtc::FakeNetworkManager;
using ::webrtc::kFakeIPv4NetworkPrefixLength;
using ::webrtc::kFakeIPv6NetworkPrefixLength;
} // namespace rtc
#endif // WEBRTC_ALLOW_DEPRECATED_NAMESPACES
#endif // RTC_BASE_FAKE_NETWORK_H_
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