1 // Copyright 2024 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 15 #pragma once 16 17 #include "pw_bluetooth_proxy/internal/l2cap_channel.h" 18 #include "pw_bluetooth_proxy/l2cap_channel_common.h" 19 20 namespace pw::bluetooth::proxy { 21 22 class BasicL2capChannel : public L2capChannel { 23 public: 24 // TODO: https://pwbug.dev/360929142 - Take the MTU. Signaling channels would 25 // provide MTU_SIG. 26 static pw::Result<BasicL2capChannel> Create( 27 L2capChannelManager& l2cap_channel_manager, 28 multibuf::MultiBufAllocator* rx_multibuf_allocator, 29 uint16_t connection_handle, 30 AclTransportType transport, 31 uint16_t local_cid, 32 uint16_t remote_cid, 33 OptionalPayloadReceiveCallback&& payload_from_controller_fn, 34 OptionalPayloadReceiveCallback&& payload_from_host_fn, 35 ChannelEventCallback&& event_fn); 36 37 BasicL2capChannel(const BasicL2capChannel& other) = delete; 38 BasicL2capChannel& operator=(const BasicL2capChannel& other) = delete; 39 BasicL2capChannel(BasicL2capChannel&&) = default; 40 // Move assignment operator allows channels to be erased from pw_containers. 41 BasicL2capChannel& operator=(BasicL2capChannel&& other) = default; 42 ~BasicL2capChannel() override; 43 44 // Overridden here to do additional length checks. 45 StatusWithMultiBuf Write(multibuf::MultiBuf&& payload) override; 46 47 protected: 48 explicit BasicL2capChannel( 49 L2capChannelManager& l2cap_channel_manager, 50 multibuf::MultiBufAllocator* rx_multibuf_allocator, 51 uint16_t connection_handle, 52 AclTransportType transport, 53 uint16_t local_cid, 54 uint16_t remote_cid, 55 OptionalPayloadReceiveCallback&& payload_from_controller_fn, 56 OptionalPayloadReceiveCallback&& payload_from_host_fn, 57 ChannelEventCallback&& event_fn); 58 59 bool HandlePduFromHost(pw::span<uint8_t> bframe) override; 60 DoClose()61 void DoClose() override {} 62 63 private: 64 bool DoHandlePduFromController(pw::span<uint8_t> bframe) override; 65 66 // TODO: https://pwbug.dev/379337272 - Delete this once all channels have 67 // transitioned to payload_queue_. UsesPayloadQueue()68 bool UsesPayloadQueue() override { return true; } 69 70 [[nodiscard]] std::optional<H4PacketWithH4> GenerateNextTxPacket() 71 PW_EXCLUSIVE_LOCKS_REQUIRED(send_queue_mutex()) override; 72 }; 73 74 } // namespace pw::bluetooth::proxy 75