WifiInterfaceImpl.cpp

/*
 *
 *    Copyright (c) 2023 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.
 */

#if (SL_MATTER_GN_BUILD == 0)
#include "sl_matter_wifi_config.h"
#endif // SL_MATTER_GN_BUILD

#include "ble_config.h"
#include "sl_status.h"
#include "sl_wifi_device.h"
#include <app/icd/server/ICDServerConfig.h>
#include <cmsis_os2.h>
#include <inet/IPAddress.h>
#include <lib/support/CHIPMem.h>
#include <lib/support/CHIPMemString.h>
#include <lib/support/logging/CHIPLogging.h>
#include <platform/silabs/wifi/SiWx/WifiInterfaceImpl.h>
#include <sl_cmsis_os2_common.h>

extern "C" {
#include "sl_si91x_driver.h"
#include "sl_si91x_host_interface.h"
#include "sl_si91x_types.h"
#include "sl_wifi.h"
#include "sl_wifi_callback_framework.h"
#include "sl_wifi_constants.h"
#include "sl_wifi_types.h"
#if SL_MBEDTLS_USE_TINYCRYPT
#include "sl_si91x_constants.h"
#include "sl_si91x_trng.h"
#else
#include <psa/crypto.h>
#endif // SL_MBEDTLS_USE_TINYCRYPT

#include <sl_net.h>
#include <sl_net_constants.h>
#include <sl_net_for_lwip.h>
#include <sl_net_wifi_types.h>
}

#if SLI_SI91X_MCU_INTERFACE
#include "rsi_wisemcu_hardware_setup.h"
#endif // SLI_SI91X_MCU_INTERFACE

#if (EXP_BOARD)
#include "rsi_bt_common_apis.h"
#include "sl_board_configuration.h"
#endif

#if CHIP_CONFIG_ENABLE_ICD_SERVER
#include <app/icd/server/ICDConfigurationData.h>       // nogncheck
#include <platform/silabs/wifi/icd/WifiSleepManager.h> // nogncheck

#if SLI_SI91X_MCU_INTERFACE // SoC Only
#include "rsi_rom_power_save.h"
#include "sl_gpio_board.h"
#include "sl_si91x_driver_gpio.h"
#include "sl_si91x_power_manager.h"
#endif // SLI_SI91X_MCU_INTERFACE
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER

using namespace chip::DeviceLayer::Silabs;
using namespace chip::app::Clusters::NetworkCommissioning;

// The REGION_CODE macro defines the regulatory region for the Wi-Fi device.
// The default value is 'US'. Users can override this macro to specify a different region code.
// The region code must match one of the values defined in the 'sl_wifi_region_code_t' enum,
// which is located in 'wifi-sdk/inc/sl_wifi_constants.h'. Example values include US, EU, JP, etc.
#ifndef REGION_CODE
#define REGION_CODE US
#endif // !REGION_CODE

// TODO: This needs to be refactored so we don't need the global object
WfxRsi_t wfx_rsi;

namespace {
osThreadId_t sWlanThread;
constexpr uint32_t kWlanTaskSize = 2048;
uint8_t wlanStack[kWlanTaskSize];
osThread_t sWlanTaskControlBlock;
constexpr osThreadAttr_t kWlanTaskAttr = { .name       = "wlan_rsi",
                                           .attr_bits  = osThreadDetached,
                                           .cb_mem     = &sWlanTaskControlBlock,
                                           .cb_size    = osThreadCbSize,
                                           .stack_mem  = wlanStack,
                                           .stack_size = kWlanTaskSize,
                                           .priority   = osPriorityHigh };

#if CHIP_CONFIG_ENABLE_ICD_SERVER
constexpr uint32_t kTimeToFullBeaconReception = 5000; // 5 seconds
#endif                                                // CHIP_CONFIG_ENABLE_ICD_SERVER

wfx_wifi_scan_ext_t temp_reset;

osSemaphoreId_t sScanCompleteSemaphore;
osMutexId_t sScanInProgressSemaphore;

osMessageQueueId_t sWifiEventQueue = nullptr;

sl_net_wifi_lwip_context_t wifi_client_context;
sl_wifi_security_t security = SL_WIFI_SECURITY_UNKNOWN;

const sl_wifi_device_configuration_t config = {
    .boot_option = LOAD_NWP_FW,
    .mac_address = NULL,
    .band        = SL_SI91X_WIFI_BAND_2_4GHZ,
    .region_code =
#ifndef SL_SI91X_ACX_MODULE
        REGION_CODE,
#else
        IGNORE_REGION,
#endif
    .boot_config = { .oper_mode = SL_SI91X_CLIENT_MODE,
                     .coex_mode = SL_SI91X_WLAN_BLE_MODE,
                     .feature_bit_map =
#ifdef SLI_SI91X_MCU_INTERFACE
                         (SL_SI91X_FEAT_SECURITY_OPEN | SL_SI91X_FEAT_WPS_DISABLE),
#else
                         (SL_SI91X_FEAT_SECURITY_OPEN | SL_SI91X_FEAT_AGGREGATION | SL_SI91X_FEAT_ULP_GPIO_BASED_HANDSHAKE |
                          SL_SI91X_FEAT_DEV_TO_HOST_ULP_GPIO_1),
#endif
                     .tcp_ip_feature_bit_map = (SL_SI91X_TCP_IP_FEAT_DHCPV4_CLIENT | SL_SI91X_TCP_IP_FEAT_DNS_CLIENT |
                                                SL_SI91X_TCP_IP_FEAT_SSL | SL_SI91X_TCP_IP_FEAT_BYPASS
#ifdef ipv6_FEATURE_REQUIRED
                                                | SL_SI91X_TCP_IP_FEAT_DHCPV6_CLIENT | SL_SI91X_TCP_IP_FEAT_IPV6
#endif
                                                | SL_SI91X_TCP_IP_FEAT_ICMP | SL_SI91X_TCP_IP_FEAT_EXTENSION_VALID),
                     .custom_feature_bit_map     = (SL_SI91X_CUSTOM_FEAT_EXTENTION_VALID | RSI_CUSTOM_FEATURE_BIT_MAP),
                     .ext_custom_feature_bit_map = (RSI_EXT_CUSTOM_FEATURE_BIT_MAP | (SL_SI91X_EXT_FEAT_BT_CUSTOM_FEAT_ENABLE)
#if (defined A2DP_POWER_SAVE_ENABLE)
                                                    | SL_SI91X_EXT_FEAT_XTAL_CLK_ENABLE(2)
#endif
                                                        ),
                     .bt_feature_bit_map = (RSI_BT_FEATURE_BITMAP
#if (RSI_BT_GATT_ON_CLASSIC)
                                            | SL_SI91X_BT_ATT_OVER_CLASSIC_ACL /* to support att over classic acl link */
#endif
                                            ),
#ifdef RSI_PROCESS_MAX_RX_DATA
                     .ext_tcp_ip_feature_bit_map =
                         (RSI_EXT_TCPIP_FEATURE_BITMAP | SL_SI91X_CONFIG_FEAT_EXTENTION_VALID | SL_SI91X_EXT_TCP_MAX_RECV_LENGTH),
#else
                     .ext_tcp_ip_feature_bit_map = (RSI_EXT_TCPIP_FEATURE_BITMAP | SL_SI91X_CONFIG_FEAT_EXTENTION_VALID),
#endif
                     //! ENABLE_BLE_PROTOCOL in bt_feature_bit_map
                     .ble_feature_bit_map =
                         ((SL_SI91X_BLE_MAX_NBR_PERIPHERALS(RSI_BLE_MAX_NBR_PERIPHERALS) |
                           SL_SI91X_BLE_MAX_NBR_CENTRALS(RSI_BLE_MAX_NBR_CENTRALS) |
                           SL_SI91X_BLE_MAX_NBR_ATT_SERV(RSI_BLE_MAX_NBR_ATT_SERV) |
                           SL_SI91X_BLE_MAX_NBR_ATT_REC(RSI_BLE_MAX_NBR_ATT_REC)) |
                          SL_SI91X_FEAT_BLE_CUSTOM_FEAT_EXTENTION_VALID | SL_SI91X_BLE_PWR_INX(RSI_BLE_PWR_INX) |
                          SL_SI91X_BLE_PWR_SAVE_OPTIONS(RSI_BLE_PWR_SAVE_OPTIONS) | SL_SI91X_916_BLE_COMPATIBLE_FEAT_ENABLE
#if RSI_BLE_GATT_ASYNC_ENABLE
                          | SL_SI91X_BLE_GATT_ASYNC_ENABLE
#endif
                          ),

                     .ble_ext_feature_bit_map = ((SL_SI91X_BLE_NUM_CONN_EVENTS(RSI_BLE_NUM_CONN_EVENTS) |
                                                  SL_SI91X_BLE_NUM_REC_BYTES(RSI_BLE_NUM_REC_BYTES))
#if RSI_BLE_INDICATE_CONFIRMATION_FROM_HOST
                                                 | SL_SI91X_BLE_INDICATE_CONFIRMATION_FROM_HOST // indication response from app
#endif
#if RSI_BLE_MTU_EXCHANGE_FROM_HOST
                                                 | SL_SI91X_BLE_MTU_EXCHANGE_FROM_HOST // MTU Exchange request initiation from app
#endif
#if RSI_BLE_SET_SCAN_RESP_DATA_FROM_HOST
                                                 | (SL_SI91X_BLE_SET_SCAN_RESP_DATA_FROM_HOST) // Set SCAN Resp Data from app
#endif
#if RSI_BLE_DISABLE_CODED_PHY_FROM_HOST
                                                 | (SL_SI91X_BLE_DISABLE_CODED_PHY_FROM_HOST) // Disable Coded PHY from app
#endif
#if BLE_SIMPLE_GATT
                                                 | SL_SI91X_BLE_GATT_INIT
#endif
                                                 ),
                     .config_feature_bit_map = (SL_SI91X_FEAT_SLEEP_GPIO_SEL_BITMAP | RSI_CONFIG_FEATURE_BITMAP) }
};

constexpr int8_t kAdvScanThreshold           = -40;
constexpr uint8_t kAdvRssiToleranceThreshold = 5;
constexpr uint8_t kAdvActiveScanDuration     = 15;
constexpr uint8_t kAdvPassiveScanDuration    = 110;
constexpr uint8_t kAdvMultiProbe             = 1;
constexpr uint8_t kAdvScanPeriodicity        = 10;
constexpr uint8_t kAdvEnableInstantbgScan    = 1;

// TODO: Confirm that this value works for size and timing
constexpr uint8_t kWfxQueueSize = 10;

// TODO: Figure out why we actually need this, we are already handling failure and retries somewhere else.
constexpr uint16_t kWifiScanTimeoutTicks = 10000;

// Convert sl_wifi_security_t to Matter WiFiSecurityBitmap flags
static chip::BitFlags<WiFiSecurityBitmap> ConvertSlWifiSecurityToBitmap(const sl_wifi_security_t security)
{
    chip::BitFlags<WiFiSecurityBitmap> flags;
    switch (security)
    {
    case SL_WIFI_OPEN:
        flags.Set(WiFiSecurityBitmap::kUnencrypted);
        break;
    case SL_WIFI_WEP:
        flags.Set(WiFiSecurityBitmap::kWep);
        break;
    case SL_WIFI_WPA:
    case SL_WIFI_WPA_ENTERPRISE:
        flags.Set(WiFiSecurityBitmap::kWpaPersonal);
        break;
    case SL_WIFI_WPA2:
    case SL_WIFI_WPA2_ENTERPRISE:
        flags.Set(WiFiSecurityBitmap::kWpa2Personal);
        break;
    case SL_WIFI_WPA_WPA2_MIXED:
        flags.Set(WiFiSecurityBitmap::kWpaPersonal).Set(WiFiSecurityBitmap::kWpa2Personal);
        break;
    case SL_WIFI_WPA3_TRANSITION:
    case SL_WIFI_WPA3_TRANSITION_ENTERPRISE:
        flags.Set(WiFiSecurityBitmap::kWpa2Personal).Set(WiFiSecurityBitmap::kWpa3Personal);
        break;
    case SL_WIFI_WPA3:
    case SL_WIFI_WPA3_ENTERPRISE:
        flags.Set(WiFiSecurityBitmap::kWpa3Personal);
        break;
    default:
        break;
    }
    return flags;
}

/**
 * @brief Network Scan callback when the device receive a scan operation from the controller.
 *        This callback is used whe the Network Commission Driver send a ScanNetworks command.
 *
 *        If the scan network was requested for a specific SSID - wfx_rsi.scan_ssid had a valid value,
 *        the callback will only forward that specific networks information.
 *        If no ssid is provided, wfx_rsi.scan_ssid is a nullptr, we return the information of all scanned networks.
 */
sl_status_t BackgroundScanCallback(sl_wifi_event_t event, sl_wifi_scan_result_t * result, uint32_t result_length, void * arg)
{
    VerifyOrReturnError(result != nullptr, SL_STATUS_NULL_POINTER);
    VerifyOrReturnError(wfx_rsi.scan_cb != nullptr, SL_STATUS_INVALID_HANDLE);

    sl_wifi_ssid_t * requestedSsidPtr = nullptr;
    chip::ByteSpan requestedSsidSpan;
    // arg is the requested SSID pointer passed during sl_wifi_set_scan_callback
    if (arg != nullptr)
    {
        requestedSsidPtr  = reinterpret_cast<sl_wifi_ssid_t *>(arg);
        requestedSsidSpan = chip::ByteSpan(requestedSsidPtr->value, requestedSsidPtr->length);
    }

    uint32_t nbreResults = result->scan_count;
    for (uint32_t i = 0; i < nbreResults; i++)
    {
        wfx_wifi_scan_result_t currentScanResult = { 0 };

        // Length excludes null-character
        size_t scannedSsidLength = strnlen(reinterpret_cast<char *>(result->scan_info[i].ssid), WFX_MAX_SSID_LENGTH);
        chip::ByteSpan scannedSsidSpan(result->scan_info[i].ssid, scannedSsidLength);

        // Copy the scanned SSID to the current scan ssid buffer that will be forwarded to the callback
        chip::MutableByteSpan currentScanSsid(currentScanResult.ssid, WFX_MAX_SSID_LENGTH);
        ReturnValueOnFailure(chip::CopySpanToMutableSpan(scannedSsidSpan, currentScanSsid),
                             SL_STATUS_SI91X_MEMORY_IS_NOT_SUFFICIENT);
        currentScanResult.ssid_length = currentScanSsid.size();

        chip::ByteSpan inBssid(result->scan_info[i].bssid, kWifiMacAddressLength);
        chip::MutableByteSpan outBssid(currentScanResult.bssid, kWifiMacAddressLength);
        ReturnValueOnFailure(chip::CopySpanToMutableSpan(inBssid, outBssid), SL_STATUS_SI91X_MEMORY_IS_NOT_SUFFICIENT);

        currentScanResult.security =
            ConvertSlWifiSecurityToBitmap(static_cast<sl_wifi_security_t>(result->scan_info[i].security_mode));
        currentScanResult.rssi = (-1) * result->scan_info[i].rssi_val; // The returned value is positive - we need to flip it
        currentScanResult.chan = result->scan_info[i].rf_channel;
        // TODO: change this when SDK provides values
        currentScanResult.wiFiBand = WiFiBandEnum::k2g4;

        // if user has provided ssid, check if the current scan result ssid matches the user provided ssid
        // NOTE: background scan does not filter by ssid, so we need to do it here
        if (!requestedSsidSpan.empty())
        {
            if (requestedSsidSpan.data_equal(currentScanSsid))
            {
                wfx_rsi.scan_cb(&currentScanResult);
            }
        }
        else // No ssid was provide - forward all results
        {
            wfx_rsi.scan_cb(&currentScanResult);
        }
    }

    wfx_rsi.scan_cb(nullptr);
    // cleanup and return
    wfx_rsi.scan_cb = nullptr;

    wfx_rsi.dev_state.Clear(WifiInterface::WifiState::kScanStarted);
    osSemaphoreRelease(sScanCompleteSemaphore);

    return SL_STATUS_OK;
}

sl_status_t SiWxPlatformInit(void)
{
    sl_status_t status = SL_STATUS_OK;

#ifdef SLI_SI91X_MCU_INTERFACE
    // SoC Configurations
    uint8_t xtal_enable = 1;
    status              = sl_si91x_m4_ta_secure_handshake(SL_SI91X_ENABLE_XTAL, 1, &xtal_enable, 0, nullptr);
    VerifyOrReturnError(status == SL_STATUS_OK, status,
                        ChipLogError(DeviceLayer, "sl_si91x_m4_ta_secure_handshake failed: 0x%lx", static_cast<uint32_t>(status)));

#if CHIP_CONFIG_ENABLE_ICD_SERVER
#ifdef ENABLE_CHIP_SHELL
#ifdef RTE_UULP_GPIO_1_PIN
    // While using the matter shell with a Low Power Build, GPIO 1 is used to check the UULP PIN 1 status
    // since UART doesn't act as a wakeup source in the UULP mode.

    // Configuring the NPS GPIO 1
    RSI_NPSSGPIO_SetPinMux(RTE_UULP_GPIO_1_PIN, 0);

    // Configure the NPSS GPIO direction to input
    RSI_NPSSGPIO_SetDir(RTE_UULP_GPIO_1_PIN, 1);

    // Enable the REN
    RSI_NPSSGPIO_InputBufferEn(RTE_UULP_GPIO_1_PIN, 1);
#endif // RTE_UULP_GPIO_1_PIN
#endif // ENABLE_CHIP_SHELL
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER
#endif // SLI_SI91X_MCU_INTERFACE

    sl_wifi_firmware_version_t version = { 0 };
    status                             = sl_wifi_get_firmware_version(&version);
    VerifyOrReturnError(status == SL_STATUS_OK, status,
                        ChipLogError(DeviceLayer, "sl_wifi_get_firmware_version failed: 0x%lx", static_cast<uint32_t>(status)));

    ChipLogDetail(DeviceLayer, "Firmware version is: %x%x.%d.%d.%d.%d.%d.%d", version.chip_id, version.rom_id, version.major,
                  version.minor, version.security_version, version.patch_num, version.customer_id, version.build_num);

    status = sl_wifi_get_mac_address(SL_WIFI_CLIENT_INTERFACE, reinterpret_cast<sl_mac_address_t *>(wfx_rsi.sta_mac.data()));
    VerifyOrReturnError(status == SL_STATUS_OK, status,
                        ChipLogError(DeviceLayer, "sl_wifi_get_mac_address failed: 0x%lx", static_cast<uint32_t>(status)));

#ifdef SL_MBEDTLS_USE_TINYCRYPT
    constexpr uint32_t trngKey[TRNG_KEY_SIZE] = { 0x16157E2B, 0xA6D2AE28, 0x8815F7AB, 0x3C4FCF09 };

    // To check the Entropy of TRNG and verify TRNG functioning.
    status = sl_si91x_trng_entropy();
    VerifyOrReturnError(status == SL_STATUS_OK, status,
                        ChipLogError(DeviceLayer, "sl_si91x_trng_entropy failed: 0x%lx", static_cast<uint32_t>(status)));

    // Initiate and program the key required for TRNG hardware engine
    status = sl_si91x_trng_program_key((uint32_t *) trngKey, TRNG_KEY_SIZE);
    VerifyOrReturnError(status == SL_STATUS_OK, status,
                        ChipLogError(DeviceLayer, "sl_si91x_trng_program_key failed: 0x%lx", static_cast<uint32_t>(status)));
#endif // SL_MBEDTLS_USE_TINYCRYPT

    wfx_rsi.dev_state.Set(WifiInterface::WifiState::kStationInit);
    return status;
}

sl_status_t ScanCallback(sl_wifi_event_t event, sl_wifi_scan_result_t * scan_result, uint32_t result_length, void * arg)
{
    sl_status_t status = SL_STATUS_OK;
    if (SL_WIFI_CHECK_IF_EVENT_FAILED(event))
    {
        if (scan_result != nullptr)
        {
            status = *reinterpret_cast<sl_status_t *>(scan_result);
            ChipLogError(DeviceLayer, "ScanCallback: failed: 0x%lx", status);
        }
        // SET FALLBACK VALUES FOR THE SCAN
        wfx_rsi.ap_chan = SL_WIFI_AUTO_CHANNEL;
#if WIFI_ENABLE_SECURITY_WPA3_TRANSITION
        security = SL_WIFI_WPA3_TRANSITION;
#else
        security = SL_WIFI_WPA_WPA2_MIXED;
#endif /* WIFI_ENABLE_SECURITY_WPA3_TRANSITION */
    }
    else
    {
        security                     = static_cast<sl_wifi_security_t>(scan_result->scan_info[0].security_mode);
        wfx_rsi.ap_chan              = scan_result->scan_info[0].rf_channel;
        wfx_rsi.credentials.security = ConvertSlWifiSecurityToBitmap(security);

        chip::MutableByteSpan bssidSpan(wfx_rsi.ap_bssid.data(), kWifiMacAddressLength);
        chip::ByteSpan inBssid(scan_result->scan_info[0].bssid, kWifiMacAddressLength);
        TEMPORARY_RETURN_IGNORED chip::CopySpanToMutableSpan(inBssid, bssidSpan);
    }

    osSemaphoreRelease(sScanCompleteSemaphore);
    return status;
}

sl_status_t InitiateScan()
{
    sl_status_t status                                   = SL_STATUS_OK;
    sl_wifi_ssid_t ssid                                  = { 0 };
    sl_wifi_scan_configuration_t wifi_scan_configuration = default_wifi_scan_configuration;

    ssid.length = wfx_rsi.credentials.ssidLength;

    chip::ByteSpan requestedSsidSpan(wfx_rsi.credentials.ssid, wfx_rsi.credentials.ssidLength);
    chip::MutableByteSpan ssidSpan(ssid.value, ssid.length);
    TEMPORARY_RETURN_IGNORED chip::CopySpanToMutableSpan(requestedSsidSpan, ssidSpan);

    sl_wifi_set_scan_callback(ScanCallback, NULL);

    osMutexAcquire(sScanInProgressSemaphore, osWaitForever);

    // This is an odd success code?
    status = sl_wifi_start_scan(SL_WIFI_CLIENT_2_4GHZ_INTERFACE, &ssid, &wifi_scan_configuration);
    if (status == SL_STATUS_IN_PROGRESS)
    {
        osSemaphoreAcquire(sScanCompleteSemaphore, kWifiScanTimeoutTicks);
        status = SL_STATUS_OK;
    }

    osMutexRelease(sScanInProgressSemaphore);
    VerifyOrReturnError(status == SL_STATUS_OK, status, ChipLogProgress(DeviceLayer, "sl_wifi_start_scan failed: 0x%lx", status));

    return status;
}

sl_status_t SetWifiConfigurations()
{
    sl_status_t status = SL_STATUS_OK;

    uint8_t join_feature_bitmap = SL_SI91X_JOIN_FEAT_LISTEN_INTERVAL_VALID; // initialize with default value
#if CHIP_CONFIG_ENABLE_ICD_SERVER
    sl_wifi_listen_interval_v2_t sleep_interval = {
        .listen_interval = chip::ICDConfigurationData::GetInstance().GetSlowPollingInterval().count()
    };
    status = sl_wifi_set_listen_interval_v2(SL_WIFI_CLIENT_INTERFACE, sleep_interval);
    VerifyOrReturnError(status == SL_STATUS_OK, status,
                        ChipLogError(DeviceLayer, "sl_wifi_set_listen_interval_v2 failed: 0x%lx", status));

    // This is be triggered on the disconnect use case, providing the amount of TA tries
    // Setting the TA retry to 1 and giving the control to the M4 for improved power efficiency
    // When max_retry_attempts is set to 0, TA will retry indefinitely.
    sl_wifi_advanced_client_configuration_t client_config = { .max_retry_attempts = 1 };
    status = sl_wifi_set_advanced_client_configuration(SL_WIFI_CLIENT_INTERFACE, &client_config);
    VerifyOrReturnError(status == SL_STATUS_OK, status,
                        ChipLogError(DeviceLayer, "sl_wifi_set_advanced_client_configuration failed: 0x%lx", status));
    join_feature_bitmap |= SL_SI91X_JOIN_FEAT_PS_CMD_LISTEN_INTERVAL_VALID;
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER

    if (wfx_rsi.credentials.passkeyLength != 0)
    {
        status = sl_net_set_credential(SL_NET_DEFAULT_WIFI_CLIENT_CREDENTIAL_ID, SL_NET_WIFI_PSK, &wfx_rsi.credentials.passkey[0],
                                       wfx_rsi.credentials.passkeyLength);
        VerifyOrReturnError(status == SL_STATUS_OK, status,
                            ChipLogError(DeviceLayer, "sl_net_set_credential failed: 0x%lx", status));
    }

    sl_net_wifi_client_profile_t profile = {
        .config = {
            .ssid = {
                .value  = { 0 },
                //static cast because the types dont match
                .length = static_cast<uint8_t>(wfx_rsi.credentials.ssidLength),
            },
            .channel = {
                .channel = SL_WIFI_AUTO_CHANNEL,
                .band = SL_WIFI_AUTO_BAND,
                .bandwidth = SL_WIFI_AUTO_BANDWIDTH
            },
            .bssid = {{0}},
            .bss_type = SL_WIFI_BSS_TYPE_INFRASTRUCTURE,
            .security = security,
            .encryption = SL_WIFI_DEFAULT_ENCRYPTION,
            .client_options = SL_WIFI_JOIN_WITH_SCAN,
            .credential_id = SL_NET_DEFAULT_WIFI_CLIENT_CREDENTIAL_ID,
        },
        .ip = {
            .mode = SL_IP_MANAGEMENT_DHCP,
            .type = SL_IPV6,
            .host_name = NULL,
            .ip = {{{0}}},
        }
    };

    chip::MutableByteSpan output(profile.config.ssid.value, WFX_MAX_SSID_LENGTH);
    chip::ByteSpan input(wfx_rsi.credentials.ssid, wfx_rsi.credentials.ssidLength);
    TEMPORARY_RETURN_IGNORED chip::CopySpanToMutableSpan(input, output);

    if (wfx_rsi.ap_chan != SL_WIFI_AUTO_CHANNEL)
    {
        // AP channel is known - This indicates that the network scan was done for a specific SSID.
        // Providing the channel and BSSID in the profile avoids scanning all channels again.
        profile.config.channel.channel = wfx_rsi.ap_chan;

        chip::MutableByteSpan bssidSpan(profile.config.bssid.octet, kWifiMacAddressLength);
        chip::ByteSpan inBssid(wfx_rsi.ap_bssid.data(), kWifiMacAddressLength);
        TEMPORARY_RETURN_IGNORED chip::CopySpanToMutableSpan(inBssid, bssidSpan);
        // Enabling quick-join since we have the channel and BSSID
        join_feature_bitmap |= SL_SI91X_JOIN_FEAT_QUICK_JOIN;
    }

    status = sl_si91x_set_join_configuration(SL_WIFI_CLIENT_INTERFACE, join_feature_bitmap);
    VerifyOrReturnError(status == SL_STATUS_OK, status,
                        ChipLogError(DeviceLayer, "sl_si91x_set_join_configuration failed: 0x%lx", status));

    status = sl_net_set_profile(SL_NET_WIFI_CLIENT_INTERFACE, SL_NET_DEFAULT_WIFI_CLIENT_PROFILE_ID, &profile);
    VerifyOrReturnError(status == SL_STATUS_OK, status, ChipLogError(DeviceLayer, "sl_net_set_profile failed: 0x%lx", status));

    return status;
}

#if CHIP_CONFIG_ENABLE_ICD_SERVER
/**
 * @brief Converts the Matter Power Save Configuration to the SiWx Power Save Configuration
 *
 * @param configuration Matter Power Save Configuration
 *
 * @return sl_si91x_performance_profile_t SiWx Power Save Configuration; Default value is High Performance
 *                                        kHighPerformance: HIGH_PERFORMANCE
 *                                        kConnectedSleep: ASSOCIATED_POWER_SAVE
 *                                        kDeepSleep: DEEP_SLEEP_WITH_RAM_RETENTION
 */
sl_si91x_performance_profile_t ConvertPowerSaveConfiguration(PowerSaveInterface::PowerSaveConfiguration configuration)
{
    sl_si91x_performance_profile_t profile = HIGH_PERFORMANCE;

    switch (configuration)
    {
    case PowerSaveInterface::PowerSaveConfiguration::kHighPerformance:
        profile = HIGH_PERFORMANCE;
        break;
    case PowerSaveInterface::PowerSaveConfiguration::kConnectedSleep:
    case PowerSaveInterface::PowerSaveConfiguration::kLIConnectedSleep:
        profile = ASSOCIATED_POWER_SAVE;
        break;
    case PowerSaveInterface::PowerSaveConfiguration::kDeepSleep:
        profile = DEEP_SLEEP_WITH_RAM_RETENTION;
        break;
    default:
        break;
    }

    return profile;
}
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER

} // namespace

namespace chip {
namespace DeviceLayer {
namespace Silabs {

WifiInterfaceImpl WifiInterfaceImpl::mInstance;

WifiInterface & WifiInterface::GetInstance()
{
    return WifiInterfaceImpl::GetInstance();
}

void WifiInterfaceImpl::MatterWifiTask(void * arg)
{
    (void) arg;
    WifiPlatformEvent event;
    sl_status_t status = SL_STATUS_OK;

    status = SiWxPlatformInit();
    VerifyOrReturn(status == SL_STATUS_OK,
                   ChipLogError(DeviceLayer, "MatterWifiTask: SiWxPlatformInit failed: 0x%lx", static_cast<uint32_t>(status)));

#if CHIP_CONFIG_ENABLE_ICD_SERVER
    // Remove High performance request after the device is initialized
    TEMPORARY_RETURN_IGNORED chip::DeviceLayer::Silabs::WifiSleepManager::GetInstance().RemoveHighPerformanceRequest();
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER

    WifiInterfaceImpl::GetInstance().NotifyWifiTaskInitialized();

    ChipLogDetail(DeviceLayer, "MatterWifiTask: starting event loop");
    for (;;)
    {
        if (osMessageQueueGet(sWifiEventQueue, &event, nullptr, osWaitForever) == osOK)
        {
            WifiInterfaceImpl::GetInstance().ProcessEvent(event);
        }
        else
        {
            ChipLogError(DeviceLayer, "MatterWifiTask: get event failed: 0x%lx", static_cast<uint32_t>(status));
        }
    }
}

CHIP_ERROR WifiInterfaceImpl::InitWiFiStack(void)
{
    sl_status_t status = SL_STATUS_OK;

#if CHIP_CONFIG_ENABLE_ICD_SERVER
    // Force the device to high performance mode during the init sequence.
    TEMPORARY_RETURN_IGNORED chip::DeviceLayer::Silabs::WifiSleepManager::GetInstance().RequestHighPerformanceWithoutTransition();
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER

    status = sl_net_init(SL_NET_WIFI_CLIENT_INTERFACE, &config, &wifi_client_context, nullptr);
    VerifyOrReturnError(status == SL_STATUS_OK, CHIP_ERROR_INTERNAL, ChipLogError(DeviceLayer, "sl_net_init failed: %lx", status));

    // Create Sempaphore for scan completion
    sScanCompleteSemaphore = osSemaphoreNew(1, 0, nullptr);
    VerifyOrReturnError(sScanCompleteSemaphore != nullptr, CHIP_ERROR_NO_MEMORY);

    // Create Semaphore for scan in-progress protection
    sScanInProgressSemaphore = osMutexNew(nullptr);
    VerifyOrReturnError(sScanInProgressSemaphore != nullptr, CHIP_ERROR_NO_MEMORY);

    // Create the message queue
    sWifiEventQueue = osMessageQueueNew(kWfxQueueSize, sizeof(WifiPlatformEvent), nullptr);
    VerifyOrReturnError(sWifiEventQueue != nullptr, CHIP_ERROR_NO_MEMORY);
#ifndef SL_MBEDTLS_USE_TINYCRYPT
    // PSA Crypto initialization
    VerifyOrReturnError(psa_crypto_init() == PSA_SUCCESS, CHIP_ERROR_INTERNAL,
                        ChipLogError(DeviceLayer, "psa_crypto_init failed: %lx", static_cast<uint32_t>(status)));
#endif // SL_MBEDTLS_USE_TINYCRYPT
    return CHIP_NO_ERROR;
}

void WifiInterfaceImpl::ProcessEvent(WifiPlatformEvent event)
{
    switch (event)
    {
    case WifiPlatformEvent::kStationConnect:
        ChipLogDetail(DeviceLayer, "WifiPlatformEvent::kStationConnect");
        wfx_rsi.dev_state.Set(WifiInterface::WifiState::kStationConnected);
        wfx_rsi.dev_state.Clear(WifiInterface::WifiState::kStationConnecting);
        ResetConnectivityNotificationFlags();
        break;

    case WifiPlatformEvent::kStationDisconnect: {
        ChipLogDetail(DeviceLayer, "WifiPlatformEvent::kStationDisconnect");
        TEMPORARY_RETURN_IGNORED TriggerPlatformWifiDisconnection();

        wfx_rsi.dev_state.Clear(WifiInterface::WifiState::kStationReady)
            .Clear(WifiInterface::WifiState::kStationConnecting)
            .Clear(WifiInterface::WifiState::kStationConnected);

        // TODO: Implement disconnect notify
        ResetConnectivityNotificationFlags();
#if (CHIP_DEVICE_CONFIG_ENABLE_IPV4)
        NotifyIPv4Change(false);
#endif /* CHIP_DEVICE_CONFIG_ENABLE_IPV4 */
        NotifyIPv6Change(false);
    }
    break;

    case WifiPlatformEvent::kAPStart:
        // TODO: Currently unimplemented
        break;

    case WifiPlatformEvent::kStationStartScan:
        ChipLogDetail(DeviceLayer, "WifiPlatformEvent::kStationStartScan");
        // To avoid IOP issues, enable high-performance mode before scan/join. TODO: Remove once IOP fix is in Wi-Fi SDK.
#if CHIP_CONFIG_ENABLE_ICD_SERVER
        TEMPORARY_RETURN_IGNORED chip::DeviceLayer::Silabs::WifiSleepManager::GetInstance().RequestHighPerformanceWithTransition();
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER
        InitiateScan();
        PostWifiPlatformEvent(WifiPlatformEvent::kStationStartJoin);
        break;

    case WifiPlatformEvent::kStationStartJoin:
        ChipLogDetail(DeviceLayer, "WifiPlatformEvent::kStationStartJoin");
        JoinWifiNetwork();
        break;

    case WifiPlatformEvent::kConnectionComplete:
        ChipLogDetail(DeviceLayer, "WifiPlatformEvent::kConnectionComplete");
        NotifySuccessfulConnection();

    default:
        break;
    }
}

void WifiInterfaceImpl::NotifySuccessfulConnection(void)
{
    struct netif * sta_netif = &wifi_client_context.netif;
    VerifyOrReturn(sta_netif != nullptr, ChipLogError(DeviceLayer, "NotifySuccessfulConnection: failed to get STA netif"));

#if (CHIP_DEVICE_CONFIG_ENABLE_IPV4)
    GotIPv4Address((uint32_t) sta_netif->ip_addr.u_addr.ip4.addr);
#endif /* CHIP_DEVICE_CONFIG_ENABLE_IPV4 */

    char addrStr[chip::Inet::IPAddress::kMaxStringLength] = { 0 };
    VerifyOrReturn(ip6addr_ntoa_r(netif_ip6_addr(sta_netif, 0), addrStr, sizeof(addrStr)) != nullptr);
    ChipLogProgress(DeviceLayer, "SLAAC OK: linklocal addr: %s", addrStr);
    NotifyIPv6Change(true);
    NotifyConnectivity();
}

sl_status_t WifiInterfaceImpl::JoinWifiNetwork(void)
{
    VerifyOrReturnError(
        !wfx_rsi.dev_state.HasAny(WifiInterface::WifiState::kStationConnecting, WifiInterface::WifiState::kStationConnected),
        SL_STATUS_IN_PROGRESS);
    sl_status_t status = SL_STATUS_OK;

    // Start Join Network
    wfx_rsi.dev_state.Set(WifiInterface::WifiState::kStationConnecting);

    status = SetWifiConfigurations();
    VerifyOrReturnError(status == SL_STATUS_OK, status, ChipLogError(DeviceLayer, "Failure to set the Wifi Configurations!"));

    status = sl_wifi_set_join_callback(JoinCallback, nullptr);
    VerifyOrReturnError(status == SL_STATUS_OK, status);

    status = sl_net_up(SL_NET_WIFI_CLIENT_INTERFACE, SL_NET_DEFAULT_WIFI_CLIENT_PROFILE_ID);

    if (!(wfx_rsi.dev_state.Has(WifiInterface::WifiState::kStationConnecting)))
    {
        // TODO: Remove this check once the sl_net_up is fixed, sl_net_up is not completely synchronous
        // and issue is mostly seen on OPEN access points

        // sl_net_up can return SL_STATUS_SUCCESS, even if the join callback has been called
        // If the state has changed, it means that the join callback has already been called
        // rejoin already started, so we should not proceed with further processing
        ChipLogDetail(DeviceLayer, "JoinCallback already called, skipping further processing");

        status = SL_STATUS_FAIL;
    }

    if (status == SL_STATUS_OK)
    {
#if CHIP_CONFIG_ENABLE_ICD_SERVER
        // Remove High performance request that might have been added during the connect/retry process
        TEMPORARY_RETURN_IGNORED chip::DeviceLayer::Silabs::WifiSleepManager::GetInstance().RemoveHighPerformanceRequest();
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER

        WifiPlatformEvent event = WifiPlatformEvent::kStationConnect;
        PostWifiPlatformEvent(event);
        return status;
    }

    // failure only happens when the firmware returns an error
    ChipLogError(DeviceLayer, "sl_net_up failed: 0x%lx", static_cast<uint32_t>(status));

    wfx_rsi.dev_state.Clear(WifiInterface::WifiState::kStationConnecting).Clear(WifiInterface::WifiState::kStationConnected);
    if (status == SL_STATUS_SI91X_NO_AP_FOUND)
    {
        ScheduleConnectionAttempt(false); // Scan and join
    }
    else
    {
        ScheduleConnectionAttempt(true); // Quick join
    }

    return status;
}

sl_status_t WifiInterfaceImpl::JoinCallback(sl_wifi_event_t event, char * result, uint32_t resultLenght, void * arg)
{
    sl_status_t status = SL_STATUS_OK;
    // If the failed event is encountered when sl_net_up is in-progress,
    // we ignore it and wait for the sl_net_up to complete.
    if (wfx_rsi.dev_state.Has(WifiInterface::WifiState::kStationConnecting))
    {
        wfx_rsi.dev_state.Clear(WifiState::kStationConnecting);
        if (SL_WIFI_CHECK_IF_EVENT_FAILED(event))
        {
            // Returning SL_STATUS_IN_PROGRESS here is intentional: if a failed event is encountered while sl_net_up is still in
            // progress, we do not want to report a final failure yet, as the connection process may still be ongoing and the final
            // outcome will be determined once sl_net_up completes. This prevents premature error handling by higher layers.
            return SL_STATUS_IN_PROGRESS;
        }
    }

    if (SL_WIFI_CHECK_IF_EVENT_FAILED(event))
    {
        status = *reinterpret_cast<sl_status_t *>(result);
        ChipLogError(DeviceLayer, "JoinCallback: failed: 0x%lx", status);
        wfx_rsi.dev_state.Clear(WifiInterface::WifiState::kStationConnected);

        if (status == SL_STATUS_SI91X_NO_AP_FOUND)
        {
            mInstance.ScheduleConnectionAttempt(false); // Scan and join
        }
        else
        {
            mInstance.ScheduleConnectionAttempt(true); // Quick join
        }
    }

    return status;
}

CHIP_ERROR WifiInterfaceImpl::GetAccessPointInfo(wfx_wifi_scan_result_t & info)
{
    // TODO: Convert this to a int8
    int32_t rssi = 0;

    // TODO: sl_wifi_get_wireless_info API is being deprecated with WiseConnect v4.0.x, we need to use the new API
    // sl_wifi_get_interface_info after upgrading to WiseConnect v4.0.x
    sl_si91x_rsp_wireless_info_t wireless_info = { 0 };
    if (sl_wifi_get_wireless_info(&wireless_info) == SL_STATUS_OK)
    {
        size_t ssid_len = strnlen(reinterpret_cast<const char *>(wireless_info.ssid), WFX_MAX_SSID_LENGTH);
        VerifyOrReturnError(ssid_len <= WFX_MAX_SSID_LENGTH, CHIP_ERROR_INVALID_STRING_LENGTH);

        // Update wfx_rsi with values from sl_wifi_get_wireless_info
        wfx_rsi.ap_chan = static_cast<uint16_t>(wireless_info.channel_number & 0xFF);
        chip::ByteSpan bssidSrc(wireless_info.bssid, kWifiMacAddressLength);
        chip::MutableByteSpan bssidDst(wfx_rsi.ap_bssid.data(), kWifiMacAddressLength);
        ReturnErrorOnFailure(chip::CopySpanToMutableSpan(bssidSrc, bssidDst));
        chip::ByteSpan ssidSrc(wireless_info.ssid, ssid_len);
        chip::MutableByteSpan ssidDst(wfx_rsi.credentials.ssid, WFX_MAX_SSID_LENGTH);
        ReturnErrorOnFailure(chip::CopySpanToMutableSpan(ssidSrc, ssidDst));
        wfx_rsi.credentials.ssidLength = static_cast<uint8_t>(ssid_len);
        wfx_rsi.credentials.security   = ConvertSlWifiSecurityToBitmap(static_cast<sl_wifi_security_t>(wireless_info.sec_type));
    }

    info.security = wfx_rsi.credentials.security;
    info.chan     = wfx_rsi.ap_chan;
    chip::MutableByteSpan output(info.ssid, WFX_MAX_SSID_LENGTH);
    chip::ByteSpan ssid(wfx_rsi.credentials.ssid, wfx_rsi.credentials.ssidLength);
    ReturnErrorOnFailure(chip::CopySpanToMutableSpan(ssid, output));
    info.ssid_length = output.size();
    chip::ByteSpan apBssidSpan(wfx_rsi.ap_bssid.data(), wfx_rsi.ap_bssid.size());
    chip::MutableByteSpan bssidSpan(info.bssid, kWifiMacAddressLength);
    ReturnErrorOnFailure(chip::CopySpanToMutableSpan(apBssidSpan, bssidSpan));

    // TODO: add error processing
    sl_wifi_get_signal_strength(SL_WIFI_CLIENT_INTERFACE, &(rssi));
    info.rssi = rssi;
    return CHIP_NO_ERROR;
}

CHIP_ERROR WifiInterfaceImpl::GetAccessPointExtendedInfo(wfx_wifi_scan_ext_t & info)
{
    sl_wifi_statistics_t test = { 0 };

    sl_status_t status = sl_wifi_get_statistics(SL_WIFI_CLIENT_INTERFACE, &test);
    VerifyOrReturnError(status == SL_STATUS_OK, CHIP_ERROR_INTERNAL);

    info.beacon_lost_count = test.beacon_lost_count - temp_reset.beacon_lost_count;
    info.beacon_rx_count   = test.beacon_rx_count - temp_reset.beacon_rx_count;
    info.mcast_rx_count    = test.mcast_rx_count - temp_reset.mcast_rx_count;
    info.mcast_tx_count    = test.mcast_tx_count - temp_reset.mcast_tx_count;
    info.ucast_rx_count    = test.ucast_rx_count - temp_reset.ucast_rx_count;
    info.ucast_tx_count    = test.ucast_tx_count - temp_reset.ucast_tx_count;
    info.overrun_count     = test.overrun_count - temp_reset.overrun_count;

    return CHIP_NO_ERROR;
}

CHIP_ERROR WifiInterfaceImpl::ResetCounters()
{
    sl_wifi_statistics_t test = { 0 };

    sl_status_t status = sl_wifi_get_statistics(SL_WIFI_CLIENT_INTERFACE, &test);
    VerifyOrReturnError(status == SL_STATUS_OK, CHIP_ERROR_INTERNAL);

    temp_reset.beacon_lost_count = test.beacon_lost_count;
    temp_reset.beacon_rx_count   = test.beacon_rx_count;
    temp_reset.mcast_rx_count    = test.mcast_rx_count;
    temp_reset.mcast_tx_count    = test.mcast_tx_count;
    temp_reset.ucast_rx_count    = test.ucast_rx_count;
    temp_reset.ucast_tx_count    = test.ucast_tx_count;
    temp_reset.overrun_count     = test.overrun_count;

    return CHIP_NO_ERROR;
}

void WifiInterfaceImpl::PostWifiPlatformEvent(WifiPlatformEvent event)
{
    sl_status_t status = osMessageQueuePut(sWifiEventQueue, &event, 0, 0);

    if (status != osOK)
    {
        ChipLogError(DeviceLayer, "PostWifiPlatformEvent: failed to post event with status: %ld", status);
        // TODO: Handle error, requeue event depending on queue size or notify relevant task,
        // Chipdie, etc.
    }
}

sl_status_t WifiInterfaceImpl::TriggerPlatformWifiDisconnection()
{
    return sl_net_down(SL_NET_WIFI_CLIENT_INTERFACE);
}

#if CHIP_CONFIG_ENABLE_ICD_SERVER
CHIP_ERROR WifiInterfaceImpl::ConfigurePowerSave(PowerSaveInterface::PowerSaveConfiguration configuration, uint32_t listenInterval)
{
    // Power save configuration is already set, nothing to do
    VerifyOrReturnValue(mCurrentPowerSaveConfiguration != configuration, CHIP_NO_ERROR);

    int32_t error = rsi_bt_power_save_profile(RSI_SLEEP_MODE_2, RSI_MAX_PSP);
    VerifyOrReturnError(error == RSI_SUCCESS, CHIP_ERROR_INTERNAL,
                        ChipLogError(DeviceLayer, "rsi_bt_power_save_profile failed: %ld", error));

    sl_wifi_performance_profile_v2_t wifi_profile = { .profile           = ConvertPowerSaveConfiguration(configuration),
                                                      .dtim_aligned_type = SL_SI91X_ALIGN_WITH_BEACON,
                                                      .listen_interval   = listenInterval };

    sl_status_t status = sl_wifi_set_performance_profile_v2(&wifi_profile);
    VerifyOrReturnError(status == SL_STATUS_OK, CHIP_ERROR_INTERNAL,
                        ChipLogError(DeviceLayer, "sl_wifi_set_performance_profile_v2 failed: 0x%lx", status));

    mCurrentPowerSaveConfiguration = configuration;
    return CHIP_NO_ERROR;
}

CHIP_ERROR WifiInterfaceImpl::ConfigureBroadcastFilter(bool enableBroadcastFilter)
{
    sl_status_t status = SL_STATUS_OK;

    uint16_t beaconDropThreshold = (enableBroadcastFilter) ? kTimeToFullBeaconReception : 0;
    uint8_t filterBcastInTim     = (enableBroadcastFilter) ? 1 : 0;

    status = sl_wifi_filter_broadcast(beaconDropThreshold, filterBcastInTim, 1 /* valid till next update*/);
    VerifyOrReturnError(status == SL_STATUS_OK, CHIP_ERROR_INTERNAL,
                        ChipLogError(DeviceLayer, "sl_wifi_filter_broadcast failed: 0x%lx", static_cast<uint32_t>(status)));

    return CHIP_NO_ERROR;
}
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER

CHIP_ERROR WifiInterfaceImpl::GetMacAddress(sl_wfx_interface_t interface, chip::MutableByteSpan & address)
{
    VerifyOrReturnError(address.size() >= kWifiMacAddressLength, CHIP_ERROR_BUFFER_TOO_SMALL);

#ifdef SL_WFX_CONFIG_SOFTAP
    chip::ByteSpan byteSpan((interface == SL_WFX_SOFTAP_INTERFACE) ? wfx_rsi.softap_mac : wfx_rsi.sta_mac);
#else
    chip::ByteSpan byteSpan(wfx_rsi.sta_mac);
#endif

    return CopySpanToMutableSpan(byteSpan, address);
}

CHIP_ERROR WifiInterfaceImpl::StartNetworkScan(chip::ByteSpan ssid, ::ScanCallback callback)
{
    VerifyOrReturnError(callback != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
    VerifyOrReturnError(!wfx_rsi.dev_state.Has(WifiState::kScanStarted), CHIP_ERROR_IN_PROGRESS);

    // SSID Max Length that is supported by the Wi-Fi SDK is 32
    VerifyOrReturnError(ssid.size() <= WFX_MAX_SSID_LENGTH, CHIP_ERROR_INVALID_STRING_LENGTH);

    wfx_rsi.dev_state.Set(WifiInterface::WifiState::kScanStarted);
    wfx_rsi.scan_cb = callback;

    sl_status_t status = SL_STATUS_OK;

    sl_wifi_scan_configuration_t wifi_scan_configuration = default_wifi_scan_configuration;
    if (wfx_rsi.dev_state.Has(WifiInterface::WifiState::kStationConnected))
    {
        /* Terminate with end of scan which is no ap sent back */
        wifi_scan_configuration.type                   = SL_WIFI_SCAN_TYPE_ADV_SCAN;
        wifi_scan_configuration.periodic_scan_interval = kAdvScanPeriodicity;
    }

    sl_wifi_advanced_scan_configuration_t advanced_scan_configuration = {
        .trigger_level        = kAdvScanThreshold,
        .trigger_level_change = kAdvRssiToleranceThreshold,
        .active_channel_time  = kAdvActiveScanDuration,
        .passive_channel_time = kAdvPassiveScanDuration,
        .enable_instant_scan  = kAdvEnableInstantbgScan,
        .enable_multi_probe   = kAdvMultiProbe,
    };

    status = sl_wifi_set_advanced_scan_configuration(&advanced_scan_configuration);

    if (status != SL_STATUS_OK)
    {
        // Since the log is required for debugging and the error log is present in the invoker itself
        ChipLogDetail(DeviceLayer, "sl_wifi_set_advanced_scan_configuration failed: 0x%lx", static_cast<uint32_t>(status));

        // Reset the scan state in case of failure
        wfx_rsi.dev_state.Clear(WifiInterface::WifiState::kScanStarted);
        wfx_rsi.scan_cb = nullptr;

        return CHIP_ERROR_INTERNAL;
    }

    // If an ssid was not provided, we need to call sl_wifi_start_scan with nullptr to scan all Wi-Fi networks
    sl_wifi_ssid_t requestedSsid      = { 0 };
    sl_wifi_ssid_t * requestedSsidPtr = nullptr;

    if (!ssid.empty())
    {
        // Copy the requested SSID to the sl_wifi_ssid_t structure
        chip::MutableByteSpan requestedSsidSpan(requestedSsid.value, sizeof(requestedSsid.value));
        ReturnErrorOnFailure(chip::CopySpanToMutableSpan(ssid, requestedSsidSpan));
        // Copy the length of the requested SSID to the sl_wifi_ssid_t structure
        requestedSsid.length = static_cast<uint8_t>(ssid.size());
        requestedSsidPtr     = &requestedSsid;
    }

    osMutexAcquire(sScanInProgressSemaphore, osWaitForever);

    // NOTE: sending requestedSsidPtr as background scan does not filter for SSID
    sl_wifi_set_scan_callback(BackgroundScanCallback, requestedSsidPtr);
    status = sl_wifi_start_scan(SL_WIFI_CLIENT_2_4GHZ_INTERFACE, requestedSsidPtr, &wifi_scan_configuration);

    if (SL_STATUS_IN_PROGRESS == status)
    {
        // NOTE: Intentional to wait for timeout here as the scan completion is indicated by the callback
        osSemaphoreAcquire(sScanCompleteSemaphore, kWifiScanTimeoutTicks);
    }

    osMutexRelease(sScanInProgressSemaphore);

    // Check for errors other than in-progress, since the sl_wifi_start_scan can return in-progress as a success code
    if (status != SL_STATUS_OK && status != SL_STATUS_IN_PROGRESS)
    {
        // Since the log is required for debugging and the error log is present in the invoker itself
        ChipLogDetail(DeviceLayer, "sl_wifi_start_scan failed: 0x%04lx", static_cast<uint32_t>(status));

        // Reset the scan state in case of failure
        wfx_rsi.dev_state.Clear(WifiInterface::WifiState::kScanStarted);
        wfx_rsi.scan_cb = nullptr;

        return CHIP_ERROR_INTERNAL;
    }
    return CHIP_NO_ERROR;
}

CHIP_ERROR WifiInterfaceImpl::StartWifiTask()
{
    // Verify that the Wifi task has not already been started.
    VerifyOrReturnError(!(wfx_rsi.dev_state.Has(WifiState::kStationStarted)), CHIP_NO_ERROR);
    wfx_rsi.dev_state.Set(WifiState::kStationStarted);

    // Creating a Wi-Fi task thread
    sWlanThread = osThreadNew(MatterWifiTask, NULL, &kWlanTaskAttr);
    VerifyOrReturnError(sWlanThread != NULL, CHIP_ERROR_NO_MEMORY, ChipLogError(DeviceLayer, "Unable to create the WifiTask."););

    return CHIP_NO_ERROR;
}

void WifiInterfaceImpl::ConfigureStationMode()
{
    wfx_rsi.dev_state.Set(WifiState::kStationMode);
}

bool WifiInterfaceImpl::IsStationModeEnabled()
{
    return wfx_rsi.dev_state.Has(WifiState::kStationMode);
}

bool WifiInterfaceImpl::IsStationConnected()
{
    return wfx_rsi.dev_state.Has(WifiState::kStationConnected);
}

bool WifiInterfaceImpl::IsStationReady()
{
    return wfx_rsi.dev_state.Has(WifiState::kStationInit);
}

CHIP_ERROR WifiInterfaceImpl::TriggerDisconnection()
{
    PostWifiPlatformEvent(WifiPlatformEvent::kStationDisconnect);
    return CHIP_NO_ERROR;
}

void WifiInterfaceImpl::NotifyConnectivity(void)
{
    VerifyOrReturn(!mHasNotifiedWifiConnectivity);

    NotifyConnection(wfx_rsi.ap_mac);
    mHasNotifiedWifiConnectivity = true;
}

void WifiInterfaceImpl::ResetConnectivityNotificationFlags(void)
{
    ResetIPNotificationStates();
    mHasNotifiedWifiConnectivity = false;

    WifiPlatformEvent event = WifiPlatformEvent::kConnectionComplete;
    PostWifiPlatformEvent(event);
}

#if CHIP_DEVICE_CONFIG_ENABLE_IPV4
void WifiInterface::GotIPv4Address(uint32_t ip)
{
    // Acquire the new IP address
    for (int i = 0; i < 4; ++i)
    {
        wfx_rsi.ip4_addr[i] = (ip >> (i * 8)) & 0xFF;
    }

    ChipLogDetail(DeviceLayer, "DHCP OK: IP=%d.%d.%d.%d", wfx_rsi.ip4_addr[0], wfx_rsi.ip4_addr[1], wfx_rsi.ip4_addr[2],
                  wfx_rsi.ip4_addr[3]);

    // Notify the Connectivity Manager - via the app
    wfx_rsi.dev_state.Set(WifiState::kStationDhcpDone).Set(WifiState::kStationReady);
    NotifyIPv4Change(true);
}
#endif /* CHIP_DEVICE_CONFIG_ENABLE_IPV4 */

void WifiInterfaceImpl::ClearWifiCredentials()
{
    ChipLogProgress(DeviceLayer, "Clear WiFi Provision");

    wfx_rsi.credentials.Clear();
    wfx_rsi.dev_state.Clear(WifiState::kStationProvisioned);
}

CHIP_ERROR WifiInterfaceImpl::GetWifiCredentials(WifiCredentials & credentials)
{
    VerifyOrReturnError(wfx_rsi.dev_state.Has(WifiState::kStationProvisioned), CHIP_ERROR_INCORRECT_STATE);
    credentials = wfx_rsi.credentials;

    return CHIP_NO_ERROR;
}

bool WifiInterfaceImpl::IsWifiProvisioned()
{
    return wfx_rsi.dev_state.Has(WifiState::kStationProvisioned);
}

CHIP_ERROR WifiInterfaceImpl::SetWifiCredentials(const WifiCredentials & credentials)
{
    VerifyOrReturnError(credentials.ssidLength, CHIP_ERROR_INVALID_ARGUMENT);
    VerifyOrReturnError(credentials.ssidLength <= WFX_MAX_SSID_LENGTH, CHIP_ERROR_INVALID_ARGUMENT);
    wfx_rsi.credentials = credentials;
    wfx_rsi.dev_state.Set(WifiState::kStationProvisioned);
    return CHIP_NO_ERROR;
}

CHIP_ERROR WifiInterfaceImpl::ConnectToAccessPoint()
{
    VerifyOrReturnError(IsWifiProvisioned(), CHIP_ERROR_INCORRECT_STATE);

    ChipLogProgress(DeviceLayer, "connect to access point: %s", wfx_rsi.credentials.ssid);

    PostWifiPlatformEvent(WifiPlatformEvent::kStationStartScan);
    return CHIP_NO_ERROR;
}

CHIP_ERROR WifiInterfaceImpl::QuickJoinToAccessPoint()
{
    VerifyOrReturnError(IsWifiProvisioned(), CHIP_ERROR_INCORRECT_STATE);

    ChipLogProgress(DeviceLayer, "quick join to access point: %s", wfx_rsi.credentials.ssid);

    PostWifiPlatformEvent(WifiPlatformEvent::kStationStartJoin);
    return CHIP_NO_ERROR;
}

bool WifiInterfaceImpl::HasAnIPv4Address()
{
    bool hasIPv4 = false;

#if CHIP_DEVICE_CONFIG_ENABLE_IPV4
    hasIPv4 = wfx_rsi.dev_state.Has(WifiState::kStationDhcpDone);
#endif // CHIP_DEVICE_CONFIG_ENABLE_IPV4

    return hasIPv4;
}

bool WifiInterfaceImpl::HasAnIPv6Address()
{
    // TODO: WifiState::kStationConnected does not guarantee SLAAC IPv6 LLA, maybe use a different FLAG
    // Once connect is sync instead of async, this should be fine
    return wfx_rsi.dev_state.Has(WifiState::kStationConnected);
}

void WifiInterfaceImpl::CancelScanNetworks()
{
    // TODO: Implement cancel scan
}

} // namespace Silabs
} // namespace DeviceLayer
} // namespace chip