NimBLEServer.h

/*
 * Copyright 2020-2025 Ryan Powell <ryan@nable-embedded.io> and
 * esp-nimble-cpp, NimBLE-Arduino contributors.
 *
 * 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
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef NIMBLE_CPP_SERVER_H_
#define NIMBLE_CPP_SERVER_H_
 
#include "nimconfig.h"
#if CONFIG_BT_ENABLED && CONFIG_BT_NIMBLE_ROLE_PERIPHERAL
 
# if defined(CONFIG_NIMBLE_CPP_IDF)
#  include "host/ble_gap.h"
# else
#  include "nimble/nimble/host/include/host/ble_gap.h"
# endif
 
/****  FIX COMPILATION ****/
# undef min
# undef max
/**************************/
 
# include <vector>
# include <array>
 
# define NIMBLE_ATT_REMOVE_HIDE   1
# define NIMBLE_ATT_REMOVE_DELETE 2
 
class NimBLEService;
class NimBLEServerCallbacks;
class NimBLEUUID;
class NimBLEConnInfo;
class NimBLEAddress;
class NimBLEService;
class NimBLECharacteristic;
# if CONFIG_BT_NIMBLE_ROLE_BROADCASTER
#  if CONFIG_BT_NIMBLE_EXT_ADV
class NimBLEExtAdvertising;
#  else
class NimBLEAdvertising;
#  endif
# endif
# if CONFIG_BT_NIMBLE_ROLE_CENTRAL
class NimBLEClient;
# endif
 
class NimBLEServer {
  public:
    void    start();
    uint8_t getConnectedCount() const;
    bool    disconnect(uint16_t connHandle, uint8_t reason = BLE_ERR_REM_USER_CONN_TERM) const;
    bool    disconnect(const NimBLEConnInfo& connInfo, uint8_t reason = BLE_ERR_REM_USER_CONN_TERM) const;
    void    setCallbacks(NimBLEServerCallbacks* pCallbacks, bool deleteCallbacks = true);
    void updateConnParams(uint16_t connHandle, uint16_t minInterval, uint16_t maxInterval, uint16_t latency, uint16_t timeout) const;
    NimBLEService*        createService(const char* uuid);
    NimBLEService*        createService(const NimBLEUUID& uuid);
    NimBLEService*        getServiceByUUID(const char* uuid, uint16_t instanceId = 0) const;
    NimBLEService*        getServiceByUUID(const NimBLEUUID& uuid, uint16_t instanceId = 0) const;
    NimBLEService*        getServiceByHandle(uint16_t handle) const;
    void                  removeService(NimBLEService* service, bool deleteSvc = false);
    void                  addService(NimBLEService* service);
    uint16_t              getPeerMTU(uint16_t connHandle) const;
    std::vector<uint16_t> getPeerDevices() const;
    NimBLEConnInfo        getPeerInfo(uint8_t index) const;
    NimBLEConnInfo        getPeerInfo(const NimBLEAddress& address) const;
    NimBLEConnInfo        getPeerInfoByHandle(uint16_t connHandle) const;
    void                  advertiseOnDisconnect(bool enable);
    void                  setDataLen(uint16_t connHandle, uint16_t tx_octets) const;
    bool                  updatePhy(uint16_t connHandle, uint8_t txPhysMask, uint8_t rxPhysMask, uint16_t phyOptions);
    bool                  getPhy(uint16_t connHandle, uint8_t* txPhy, uint8_t* rxPhy);
 
# if CONFIG_BT_NIMBLE_ROLE_CENTRAL
    NimBLEClient* getClient(uint16_t connHandle);
    NimBLEClient* getClient(const NimBLEConnInfo& connInfo);
    void          deleteClient();
# endif
 
# if CONFIG_BT_NIMBLE_ROLE_BROADCASTER
#  if CONFIG_BT_NIMBLE_EXT_ADV
    NimBLEExtAdvertising* getAdvertising() const;
    bool                  startAdvertising(uint8_t instanceId, int duration = 0, int maxEvents = 0) const;
    bool                  stopAdvertising(uint8_t instanceId) const;
#  endif
 
#  if !CONFIG_BT_NIMBLE_EXT_ADV || defined(_DOXYGEN_)
    NimBLEAdvertising* getAdvertising() const;
    bool               startAdvertising(uint32_t duration = 0) const;
    bool               stopAdvertising() const;
#  endif
# endif
 
  private:
    friend class NimBLEDevice;
    friend class NimBLEService;
    friend class NimBLECharacteristic;
# if CONFIG_BT_NIMBLE_ROLE_BROADCASTER
#  if CONFIG_BT_NIMBLE_EXT_ADV
    friend class NimBLEExtAdvertising;
#  else
    friend class NimBLEAdvertising;
#  endif
# endif
 
    NimBLEServer();
    ~NimBLEServer();
 
    bool m_gattsStarted : 1;
    bool m_svcChanged : 1;
    bool m_deleteCallbacks : 1;
# if !CONFIG_BT_NIMBLE_EXT_ADV
    bool m_advertiseOnDisconnect : 1;
# endif
    NimBLEServerCallbacks*                                 m_pServerCallbacks;
    std::vector<NimBLEService*>                            m_svcVec;
    std::array<uint16_t, CONFIG_BT_NIMBLE_MAX_CONNECTIONS> m_connectedPeers;
 
# if CONFIG_BT_NIMBLE_ROLE_CENTRAL
    NimBLEClient* m_pClient{nullptr};
# endif
 
    static int handleGapEvent(struct ble_gap_event* event, void* arg);
    static int handleGattEvent(uint16_t connHandle, uint16_t attrHandle, ble_gatt_access_ctxt* ctxt, void* arg);
    void       serviceChanged();
    void       resetGATT();
 
}; // NimBLEServer
 
class NimBLEServerCallbacks {
  public:
    virtual ~NimBLEServerCallbacks() {};
 
    virtual void onConnect(NimBLEServer* pServer, NimBLEConnInfo& connInfo);
 
    virtual void onDisconnect(NimBLEServer* pServer, NimBLEConnInfo& connInfo, int reason);
 
    virtual void onMTUChange(uint16_t MTU, NimBLEConnInfo& connInfo);
 
    virtual uint32_t onPassKeyDisplay();
 
    virtual void onConfirmPassKey(NimBLEConnInfo& connInfo, uint32_t pin);
 
    virtual void onAuthenticationComplete(NimBLEConnInfo& connInfo);
 
    virtual void onIdentity(NimBLEConnInfo& connInfo);
 
    virtual void onConnParamsUpdate(NimBLEConnInfo& connInfo);
 
    virtual void onPhyUpdate(NimBLEConnInfo& connInfo, uint8_t txPhy, uint8_t rxPhy);
}; // NimBLEServerCallbacks
 
#endif // CONFIG_BT_ENABLED && CONFIG_BT_NIMBLE_ROLE_PERIPHERAL
#endif // NIMBLE_CPP_SERVER_H_