blob: b8ed84445c40f0330a4ec9017ecc34d3e80aec35 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/*
* Copyright (c) 2017-2021 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <hicn/transport/config.h>
#include <asio.hpp>
#include <asio/steady_timer.hpp>
#include <functional>
#include <random>
#include <unordered_map>
namespace transport {
namespace protocol {
namespace rtc {
class ProbeHandler : public std::enable_shared_from_this<ProbeHandler> {
public:
using SendProbeCallback = std::function<void(uint32_t)>;
public:
ProbeHandler(SendProbeCallback &&send_callback,
asio::io_service &io_service);
~ProbeHandler();
// if the function returns 0 the probe is not valaid
uint64_t getRtt(uint32_t seq);
// reset the probes parameters. it stop the current probing.
// to restar call sendProbes.
// probe_interval = 0 means that no event will be scheduled
// max_probe = 0 means no limit to the number of probe to send
void setProbes(uint32_t probe_interval, uint32_t max_probes);
// stop to schedule probes
void stopProbes();
void sendProbes();
private:
uint32_t probe_interval_; // us
uint32_t max_probes_; // packets
uint32_t sent_probes_; // packets
std::unique_ptr<asio::steady_timer> probe_timer_;
// map from seqnumber to timestamp
std::unordered_map<uint32_t, uint64_t> pending_probes_;
// random generator
std::default_random_engine rand_eng_;
std::uniform_int_distribution<uint32_t> distr_;
SendProbeCallback send_probe_callback_;
};
} // namespace rtc
} // namespace protocol
} // namespace transport
|
