1 /* 2 * Copyright (c) 2012 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 #ifndef WEBRTC_TEST_FAKE_NETWORK_PIPE_H_ 12 #define WEBRTC_TEST_FAKE_NETWORK_PIPE_H_ 13 14 #include <queue> 15 16 #include "webrtc/base/constructormagic.h" 17 #include "webrtc/base/criticalsection.h" 18 #include "webrtc/base/scoped_ptr.h" 19 #include "webrtc/typedefs.h" 20 21 namespace webrtc { 22 23 class Clock; 24 class CriticalSectionWrapper; 25 class NetworkPacket; 26 class PacketReceiver; 27 28 // Class faking a network link. This is a simple and naive solution just faking 29 // capacity and adding an extra transport delay in addition to the capacity 30 // introduced delay. 31 32 // TODO(mflodman) Add random and bursty packet loss. 33 class FakeNetworkPipe { 34 public: 35 struct Config { ConfigConfig36 Config() {} 37 // Queue length in number of packets. 38 size_t queue_length_packets = 0; 39 // Delay in addition to capacity induced delay. 40 int queue_delay_ms = 0; 41 // Standard deviation of the extra delay. 42 int delay_standard_deviation_ms = 0; 43 // Link capacity in kbps. 44 int link_capacity_kbps = 0; 45 // Random packet loss. 46 int loss_percent = 0; 47 }; 48 49 FakeNetworkPipe(Clock* clock, const FakeNetworkPipe::Config& config); 50 ~FakeNetworkPipe(); 51 52 // Must not be called in parallel with SendPacket or Process. 53 void SetReceiver(PacketReceiver* receiver); 54 55 // Sets a new configuration. This won't affect packets already in the pipe. 56 void SetConfig(const FakeNetworkPipe::Config& config); 57 58 // Sends a new packet to the link. 59 void SendPacket(const uint8_t* packet, size_t packet_length); 60 61 // Processes the network queues and trigger PacketReceiver::IncomingPacket for 62 // packets ready to be delivered. 63 void Process(); 64 int64_t TimeUntilNextProcess() const; 65 66 // Get statistics. 67 float PercentageLoss(); 68 int AverageDelay(); dropped_packets()69 size_t dropped_packets() { return dropped_packets_; } sent_packets()70 size_t sent_packets() { return sent_packets_; } 71 72 private: 73 Clock* const clock_; 74 mutable rtc::CriticalSection lock_; 75 PacketReceiver* packet_receiver_; 76 std::queue<NetworkPacket*> capacity_link_; 77 std::queue<NetworkPacket*> delay_link_; 78 79 // Link configuration. 80 Config config_; 81 82 // Statistics. 83 size_t dropped_packets_; 84 size_t sent_packets_; 85 int64_t total_packet_delay_; 86 87 int64_t next_process_time_; 88 89 RTC_DISALLOW_COPY_AND_ASSIGN(FakeNetworkPipe); 90 }; 91 92 } // namespace webrtc 93 94 #endif // WEBRTC_TEST_FAKE_NETWORK_PIPE_H_ 95