1 /* 2 * Copyright 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <chrono> 20 #include <cstdint> 21 22 #include "hci/address_with_type.h" 23 #include "packets/hci_packets.h" 24 #include "phy.h" 25 26 namespace rootcanal { 27 28 using ::bluetooth::hci::AddressWithType; 29 30 enum AclConnectionState { 31 kActiveMode, 32 kHoldMode, 33 kSniffMode, 34 }; 35 36 // Model the connection of a device to the controller. 37 class AclConnection { 38 public: 39 AclConnection(AddressWithType address, AddressWithType own_address, 40 AddressWithType resolved_address, Phy::Type phy_type, bluetooth::hci::Role role); 41 42 virtual ~AclConnection() = default; 43 GetPhyType()44 Phy::Type GetPhyType() const { return type_; } 45 GetAddress()46 AddressWithType GetAddress() const { return address_; } GetOwnAddress()47 AddressWithType GetOwnAddress() const { return own_address_; } GetResolvedAddress()48 AddressWithType GetResolvedAddress() const { return resolved_address_; } 49 50 void Encrypt(); 51 bool IsEncrypted() const; 52 53 void SetLinkPolicySettings(uint16_t settings); GetLinkPolicySettings()54 uint16_t GetLinkPolicySettings() const { return link_policy_settings_; } IsRoleSwitchEnabled()55 bool IsRoleSwitchEnabled() const { return (link_policy_settings_ & 0x1) != 0; } IsHoldModeEnabled()56 bool IsHoldModeEnabled() const { return (link_policy_settings_ & 0x2) != 0; } IsSniffModeEnabled()57 bool IsSniffModeEnabled() const { return (link_policy_settings_ & 0x4) != 0; } 58 GetMode()59 AclConnectionState GetMode() const { return state_; } 60 61 bluetooth::hci::Role GetRole() const; 62 void SetRole(bluetooth::hci::Role role); 63 64 int8_t GetRssi() const; 65 void SetRssi(int8_t rssi); 66 67 std::chrono::steady_clock::duration TimeUntilNearExpiring() const; 68 std::chrono::steady_clock::duration TimeUntilExpired() const; 69 void ResetLinkTimer(); 70 bool IsNearExpiring() const; 71 bool HasExpired() const; 72 73 // LE-ACL state. InitiatePhyUpdate()74 void InitiatePhyUpdate() { initiated_phy_update_ = true; } PhyUpdateComplete()75 void PhyUpdateComplete() { initiated_phy_update_ = false; } InitiatedPhyUpdate()76 bool InitiatedPhyUpdate() const { return initiated_phy_update_; } GetTxPhy()77 bluetooth::hci::PhyType GetTxPhy() const { return tx_phy_; } GetRxPhy()78 bluetooth::hci::PhyType GetRxPhy() const { return rx_phy_; } SetTxPhy(bluetooth::hci::PhyType phy)79 void SetTxPhy(bluetooth::hci::PhyType phy) { tx_phy_ = phy; } SetRxPhy(bluetooth::hci::PhyType phy)80 void SetRxPhy(bluetooth::hci::PhyType phy) { rx_phy_ = phy; } 81 82 private: 83 AddressWithType address_; 84 AddressWithType own_address_; 85 AddressWithType resolved_address_; 86 Phy::Type type_{Phy::Type::BR_EDR}; 87 88 // Reports the RSSI measured for the last packet received on 89 // this connection. 90 int8_t rssi_{0}; 91 92 // State variables 93 bool encrypted_{false}; 94 uint16_t link_policy_settings_{0}; 95 AclConnectionState state_{kActiveMode}; 96 bluetooth::hci::Role role_{bluetooth::hci::Role::CENTRAL}; 97 std::chrono::steady_clock::time_point last_packet_timestamp_; 98 std::chrono::steady_clock::duration timeout_; 99 100 // LE-ACL state. 101 bluetooth::hci::PhyType tx_phy_{bluetooth::hci::PhyType::LE_1M}; 102 bluetooth::hci::PhyType rx_phy_{bluetooth::hci::PhyType::LE_1M}; 103 bool initiated_phy_update_{false}; 104 }; 105 106 } // namespace rootcanal 107