src/platform/cc32xx/PlatformManagerImpl.cpp

/*
 *
 *    Copyright (c) 2020 Project CHIP Authors
 *
 *    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.
 */

/**
 *    @file
 *          Provides an implementation of the PlatformManager object
 *          for the Texas Instruments CC32XX platform.
 */

/* this file behaves like a config.h, comes first */
#include <platform/internal/CHIPDeviceLayerInternal.h>

#include <crypto/CHIPCryptoPAL.h>
#include <platform/PlatformManager.h>
#include <platform/cc32xx/DiagnosticDataProviderImpl.h>
#include <platform/internal/GenericPlatformManagerImpl_FreeRTOS.ipp>

#include <lwip/tcpip.h>

namespace chip {
namespace DeviceLayer {

PlatformManagerImpl PlatformManagerImpl::sInstance;

static int app_get_random(uint8_t * aOutput, size_t aLen)
{
    size_t i;

    // TBD add implementation
    for (i = 0; i < aLen; i++)
    {
        aOutput[i] = i * 31 + 17;
    }
    return 0;
}

static void app_random_init(void)
{
    return;
}

static int app_entropy_source(void * data, unsigned char * output, size_t len, size_t * olen)
{

    app_get_random(reinterpret_cast<uint8_t *>(output), static_cast<uint16_t>(len));
    *olen = len;

    return 0;
}

CHIP_ERROR PlatformManagerImpl::_InitChipStack(void)
{
    CHIP_ERROR err;

    // Initialize the configuration system.
    err = Internal::CC32XXConfig::Init();
    SuccessOrExit(err);

    // Initialize LwIP.
    tcpip_init(NULL, NULL);

    app_random_init();
    err = chip::Crypto::add_entropy_source(app_entropy_source, NULL, 16);
    SuccessOrExit(err);

    // Call _InitChipStack() on the generic implementation base class
    // to finish the initialization process.
    err = Internal::GenericPlatformManagerImpl_FreeRTOS<PlatformManagerImpl>::_InitChipStack();
    SuccessOrExit(err);

exit:
    return err;
}

} // namespace DeviceLayer
} // namespace chip