1 /*
2 * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "test/network/traffic_route.h"
12
13 #include <algorithm>
14 #include <memory>
15 #include <utility>
16
17 #include "absl/types/optional.h"
18 #include "rtc_base/logging.h"
19 #include "rtc_base/numerics/safe_minmax.h"
20
21 namespace webrtc {
22 namespace test {
23 namespace {
24
25 class NullReceiver : public EmulatedNetworkReceiverInterface {
26 public:
OnPacketReceived(EmulatedIpPacket packet)27 void OnPacketReceived(EmulatedIpPacket packet) override {}
28 };
29
30 class ActionReceiver : public EmulatedNetworkReceiverInterface {
31 public:
ActionReceiver(std::function<void ()> action)32 explicit ActionReceiver(std::function<void()> action) : action_(action) {}
33 ~ActionReceiver() override = default;
34
OnPacketReceived(EmulatedIpPacket packet)35 void OnPacketReceived(EmulatedIpPacket packet) override {
36 action_();
37 }
38
39 private:
40 std::function<void()> action_;
41 };
42
43 } // namespace
44
CrossTrafficRouteImpl(Clock * clock,EmulatedNetworkReceiverInterface * receiver,EmulatedEndpointImpl * endpoint)45 CrossTrafficRouteImpl::CrossTrafficRouteImpl(
46 Clock* clock,
47 EmulatedNetworkReceiverInterface* receiver,
48 EmulatedEndpointImpl* endpoint)
49 : clock_(clock), receiver_(receiver), endpoint_(endpoint) {
50 null_receiver_ = std::make_unique<NullReceiver>();
51 absl::optional<uint16_t> port =
52 endpoint_->BindReceiver(0, null_receiver_.get());
53 RTC_DCHECK(port);
54 null_receiver_port_ = port.value();
55 }
56 CrossTrafficRouteImpl::~CrossTrafficRouteImpl() = default;
57
TriggerPacketBurst(size_t num_packets,size_t packet_size)58 void CrossTrafficRouteImpl::TriggerPacketBurst(size_t num_packets,
59 size_t packet_size) {
60 for (size_t i = 0; i < num_packets; ++i) {
61 SendPacket(packet_size);
62 }
63 }
64
NetworkDelayedAction(size_t packet_size,std::function<void ()> action)65 void CrossTrafficRouteImpl::NetworkDelayedAction(size_t packet_size,
66 std::function<void()> action) {
67 auto action_receiver = std::make_unique<ActionReceiver>(action);
68 // BindOneShotReceiver arranges to free the port in the endpoint after the
69 // action is done.
70 absl::optional<uint16_t> port =
71 endpoint_->BindOneShotReceiver(0, action_receiver.get());
72 RTC_DCHECK(port);
73 actions_.push_back(std::move(action_receiver));
74 SendPacket(packet_size, port.value());
75 }
76
SendPacket(size_t packet_size)77 void CrossTrafficRouteImpl::SendPacket(size_t packet_size) {
78 SendPacket(packet_size, null_receiver_port_);
79 }
80
SendPacket(size_t packet_size,uint16_t dest_port)81 void CrossTrafficRouteImpl::SendPacket(size_t packet_size, uint16_t dest_port) {
82 rtc::CopyOnWriteBuffer data(packet_size);
83 std::fill_n(data.MutableData(), data.size(), 0);
84 receiver_->OnPacketReceived(EmulatedIpPacket(
85 /*from=*/rtc::SocketAddress(),
86 rtc::SocketAddress(endpoint_->GetPeerLocalAddress(), dest_port), data,
87 clock_->CurrentTime()));
88 }
89
90 } // namespace test
91 } // namespace webrtc
92