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Diffstat (limited to 'third_party/libwebrtc/net/dcsctp/tx/retransmission_error_counter.h')
-rw-r--r-- | third_party/libwebrtc/net/dcsctp/tx/retransmission_error_counter.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/tx/retransmission_error_counter.h b/third_party/libwebrtc/net/dcsctp/tx/retransmission_error_counter.h new file mode 100644 index 0000000000..18af3d3c4f --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/tx/retransmission_error_counter.h @@ -0,0 +1,51 @@ +/* + * Copyright (c) 2021 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 NET_DCSCTP_TX_RETRANSMISSION_ERROR_COUNTER_H_ +#define NET_DCSCTP_TX_RETRANSMISSION_ERROR_COUNTER_H_ + +#include <functional> +#include <string> +#include <utility> + +#include "absl/strings/string_view.h" +#include "net/dcsctp/public/dcsctp_options.h" + +namespace dcsctp { + +// The RetransmissionErrorCounter is a simple counter with a limit, and when +// the limit is exceeded, the counter is exhausted and the connection will +// be closed. It's incremented on retransmission errors, such as the T3-RTX +// timer expiring, but also missing heartbeats and stream reset requests. +class RetransmissionErrorCounter { + public: + RetransmissionErrorCounter(absl::string_view log_prefix, + const DcSctpOptions& options) + : log_prefix_(std::string(log_prefix) + "rtx-errors: "), + limit_(options.max_retransmissions) {} + + // Increments the retransmission timer. If the maximum error count has been + // reached, `false` will be returned. + bool Increment(absl::string_view reason); + bool IsExhausted() const { return limit_.has_value() && counter_ > *limit_; } + + // Clears the retransmission errors. + void Clear(); + + // Returns its current value + int value() const { return counter_; } + + private: + const std::string log_prefix_; + const absl::optional<int> limit_; + int counter_ = 0; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_TX_RETRANSMISSION_ERROR_COUNTER_H_ |