| // Copyright 2020 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/connectivity/bluetooth/core/bt-host/public/pw_bluetooth_sapphire/internal/host/l2cap/enhanced_retransmission_mode_engines.h" |
| |
| namespace bt::l2cap::internal { |
| |
| // This factory function ensures that their states are properly linked and |
| // allows for unit tests of their linked behaviors without adding dependencies |
| // between the classes nor tie their lifetimes together. If tying their |
| // lifetimes together is desired, one should perhaps hold reference counts on |
| // the other to preserve the independence. |
| std::pair<std::unique_ptr<EnhancedRetransmissionModeRxEngine>, |
| std::unique_ptr<EnhancedRetransmissionModeTxEngine>> |
| MakeLinkedEnhancedRetransmissionModeEngines( |
| ChannelId channel_id, |
| uint16_t max_tx_sdu_size, |
| uint8_t max_transmissions, |
| uint8_t n_frames_in_tx_window, |
| TxEngine::TxChannel& channel, |
| EnhancedRetransmissionModeTxEngine::ConnectionFailureCallback |
| connection_failure_callback, |
| pw::async::Dispatcher& dispatcher) { |
| auto rx_engine = std::make_unique<EnhancedRetransmissionModeRxEngine>( |
| fit::bind_member(&channel, &TxEngine::TxChannel::SendFrame), |
| connection_failure_callback.share()); |
| auto tx_engine = std::make_unique<EnhancedRetransmissionModeTxEngine>( |
| channel_id, |
| max_tx_sdu_size, |
| max_transmissions, |
| n_frames_in_tx_window, |
| channel, |
| std::move(connection_failure_callback), |
| dispatcher); |
| |
| // The direction swap here is because our acknowledgment sequence is based on |
| // the peer's transmit sequence and vice versa. |
| rx_engine->set_receive_seq_num_callback( |
| fit::bind_member<&EnhancedRetransmissionModeTxEngine::UpdateAckSeq>( |
| tx_engine.get())); |
| rx_engine->set_ack_seq_num_callback( |
| fit::bind_member<&EnhancedRetransmissionModeTxEngine::UpdateReqSeq>( |
| tx_engine.get())); |
| rx_engine->set_remote_busy_set_callback( |
| fit::bind_member<&EnhancedRetransmissionModeTxEngine::SetRemoteBusy>( |
| tx_engine.get())); |
| rx_engine->set_remote_busy_cleared_callback( |
| fit::bind_member<&EnhancedRetransmissionModeTxEngine::ClearRemoteBusy>( |
| tx_engine.get())); |
| rx_engine->set_single_retransmit_set_callback( |
| fit::bind_member< |
| &EnhancedRetransmissionModeTxEngine::SetSingleRetransmit>( |
| tx_engine.get())); |
| rx_engine->set_range_retransmit_set_callback( |
| fit::bind_member<&EnhancedRetransmissionModeTxEngine::SetRangeRetransmit>( |
| tx_engine.get())); |
| return {std::move(rx_engine), std::move(tx_engine)}; |
| } |
| |
| } // namespace bt::l2cap::internal |
