diff options
Diffstat (limited to 'libtransport/src/protocols/rtc/probe_handler.h')
-rw-r--r-- | libtransport/src/protocols/rtc/probe_handler.h | 40 |
1 files changed, 30 insertions, 10 deletions
diff --git a/libtransport/src/protocols/rtc/probe_handler.h b/libtransport/src/protocols/rtc/probe_handler.h index e34b23df0..d989194d4 100644 --- a/libtransport/src/protocols/rtc/probe_handler.h +++ b/libtransport/src/protocols/rtc/probe_handler.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2017-2021 Cisco and/or its affiliates. + * Copyright (c) 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: @@ -26,6 +26,12 @@ namespace protocol { namespace rtc { +enum class ProbeType { + NOT_PROBE, + INIT, + RTT, +}; + class ProbeHandler : public std::enable_shared_from_this<ProbeHandler> { public: using SendProbeCallback = std::function<void(uint32_t)>; @@ -35,31 +41,45 @@ class ProbeHandler : public std::enable_shared_from_this<ProbeHandler> { ~ProbeHandler(); - // if the function returns 0 the probe is not valaid - uint64_t getRtt(uint32_t seq); + // If the function returns 0 the probe is not valid. + uint64_t getRtt(uint32_t seq, bool is_valid); + + // this function may return a residual loss rate higher than the real one if + // we don't wait enough time for the probes to come back + double getProbeLossRate(); + + // Set the probe suffix range [min, max] + void setSuffixRange(uint32_t min, uint32_t max); - // 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 + // Reset the probes parameters and stops the current probing. + // 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(); + static ProbeType getProbeType(uint32_t seq); + private: + void generateProbe(); + uint32_t probe_interval_; // us uint32_t max_probes_; // packets uint32_t sent_probes_; // packets + uint32_t recv_probes_; // packets + + bool valid_batch_; // if at least one probe in a batch is considered not + // valid (e.g. prod rate == ~0) the full batch is invalid. + // the bool is set to true when sendProbe is called std::unique_ptr<asio::steady_timer> probe_timer_; - // map from seqnumber to timestamp + // Map from packet suffixes to timestamp std::unordered_map<uint32_t, uint64_t> pending_probes_; - // random generator + // Random generator std::default_random_engine rand_eng_; std::uniform_int_distribution<uint32_t> distr_; |