inner/c_adapter/ohos_bt_spp.cpp

/*
 * Copyright (C) 2021-2022 Huawei Device Co., Ltd.
 * 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 LOG_TAG
#define LOG_TAG "bt_c_adapter_spp"
#endif

#include "ohos_bt_spp.h"
#include "ohos_bt_socket.h"

#include <iostream>
#include <cstring>
#include <vector>

#include "ohos_bt_adapter_utils.h"
#include "bluetooth_socket.h"
#include "bluetooth_host.h"
#include "bluetooth_log.h"
#include "bluetooth_utils.h"

#ifdef __cplusplus
extern "C" {
#endif

using namespace std;

namespace OHOS {
namespace Bluetooth {
static mutex g_writeMutex;

/**
 * @brief Creates an server listening socket based on the service record.
 *
 * @param socketPara The parameters to create a server socket.
 * @param name The service's name.
 * @param len The length of the service's name.
 * @return Returns a server ID, if create fail return {@link BT_SPP_INVALID_ID}.
 */
int SppServerCreate(BtCreateSocketPara *socketPara, const char *name, unsigned int len)
{
    HILOGD("start!");
    if (socketPara == nullptr) {
        HILOGI("socketPara is invalid!");
        return BT_SPP_INVALID_ID;
    }
    BluetoothCreateSocketPara btsocketPara;
    btsocketPara.isEncrypt = socketPara->isEncrypt;
    btsocketPara.socketType = BluetoothSocketType(socketPara->socketType);
    btsocketPara.uuid.uuidLen = socketPara->uuid.uuidLen;
    btsocketPara.uuid.uuid = socketPara->uuid.uuid;

    return SocketServerCreate(&btsocketPara, name);
}

/**
 * @brief Waits for a remote device to connect to this server socket.
 *
 * This method return a client ID indicates a client socket
 * can be used to read data from and write data to remote device.
 *
 * @param serverId The relative ID used to identify the current server socket, obtain the value by calling
 * {@link SppServerCreate}.
 * @return Returns a client ID, if accept fail return {@link BT_SPP_INVALID_ID}.
 */
int SppServerAccept(int serverId)
{
    HILOGI("start, serverId: %{public}d", serverId);
    return SocketServerAccept(serverId);
}

/**
 * @brief Disables an spp server socket and releases related resources.
 *
 * @param serverId The relative ID used to identify the current server socket, obtain the value by calling
 * {@link SppServerCreate}.
 * @return Returns the operation result status {@link BtStatus}.
 */
int SppServerClose(int serverId)
{
    HILOGI("serverId: %{public}d", serverId);
    return SocketServerClose(serverId);
}

/**
 * @brief Connects to a remote device over the socket.
 *
 * @param socketPara The param to create a client socket and connect to a remote device.
 * @return Returns a client ID, if connect fail return {@link BT_SPP_INVALID_ID}.
 */
int SppConnect(BtCreateSocketPara *socketPara, const BdAddr *bdAddr)
{
    HILOGI("SppConnect start");
    if (socketPara == nullptr) {
        HILOGI("socketPara is invalid!");
        return BT_SPP_INVALID_ID;
    }
    BluetoothCreateSocketPara btsocketPara;
    btsocketPara.isEncrypt = socketPara->isEncrypt;
    btsocketPara.socketType = BluetoothSocketType(socketPara->socketType);
    btsocketPara.uuid.uuidLen = socketPara->uuid.uuidLen;
    btsocketPara.uuid.uuid = socketPara->uuid.uuid;
    return SocketConnect(&btsocketPara, bdAddr, SPP_SOCKET_PSM_VALUE);
}

/**
 * @brief Disables a connection and releases related resources.
 *
 * @param clientId The relative ID used to identify the current client socket.
 * @return Returns the operation result status {@link BtStatus}.
 */
int SppDisconnect(int clientId)
{
    lock_guard<mutex> lock(g_writeMutex);
    HILOGI("clientId: %{public}d", clientId);
    return SocketDisconnect(clientId);
}

/**
 * @brief Spp get remote device's address.
 *
 * @param clientId The relative ID used to identify the current client socket.
 * @param remoteAddr Remote device's address, memory allocated by caller.
 * @return Returns the operation result status {@link BtStatus}.
 */
int SppGetRemoteAddr(int clientId, BdAddr *remoteAddr)
{
    HILOGI("clientId: %{public}d", clientId);
    return SocketGetRemoteAddr(clientId, remoteAddr);
}

/**
 * @brief Get the connection status of this socket.
 *
 * @param clientId The relative ID used to identify the current client socket.
 * @return Returns true is connected or false is not connected.
 */
bool IsSppConnected(int clientId)
{
    HILOGI("clientId: %{public}d", clientId);
    return IsSocketConnected(clientId);
}

/**
 * @brief Read data from socket.
 *
 * @param clientId The relative ID used to identify the current client socket.
 * @param buf Indicate the buffer which read in, memory allocated by caller.
 * @param bufLen Indicate the buffer length.
 * @return Returns the length greater than 0 as read the actual length.
 * Returns {@link BT_SPP_READ_SOCKET_CLOSED} if the socket is closed.
 * Returns {@link BT_SPP_READ_FAILED} if the operation failed.
 */
int SppRead(int clientId, char *buf, const unsigned int bufLen)
{
    return SocketRead(clientId, reinterpret_cast<uint8_t*>(buf), bufLen);
}

/**
 * @brief Client write data to socket.
 *
 * @param clientId The relative ID used to identify the current client socket.
 * @param data Indicate the data to be written.
 * @return Returns the actual write length.
 * Returns {@link BT_SPP_WRITE_FAILED} if the operation failed.
 */
int SppWrite(int clientId, const char *data, const unsigned int len)
{
    lock_guard<mutex> lock(g_writeMutex);
    HILOGD("start, clientId: %{public}d, len: %{public}d", clientId, len);
    return SocketWrite(clientId, reinterpret_cast<const uint8_t*>(data), len);
}

/**
 * @brief Adjust the socket send and recv buffer size, limit range is 4KB to 50KB
 *
 * @param clientId The relative ID used to identify the current client socket.
 * @param bufferSize The buffer size want to set, unit is byte.
 * @return  Returns the operation result status {@link BtStatus}.
 */
int SppSetSocketBufferSize(int clientId, int bufferSize)
{
    HILOGI("start, clientId: %{public}d, size: %{public}d", clientId, bufferSize);
    if (bufferSize < 0) {
        return OHOS_BT_STATUS_PARM_INVALID;
    }
    return SetSocketBufferSize(clientId, bufferSize);
}
}  // namespace Bluetooth
}  // namespace OHOS
#ifdef __cplusplus
}
#endif