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WifiInterfaceImpl.cpp
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/*
*
* Copyright (c) 2022 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.
*/
#include "FreeRTOS.h"
#include "em_bus.h"
#include "em_cmu.h"
#include "em_gpio.h"
#include "em_ldma.h"
#include "em_usart.h"
#include "event_groups.h"
#include "gpiointerrupt.h"
#include "sl_wfx_cmd_api.h"
#include "sl_wfx_constants.h"
#include "task.h"
#include <app/icd/server/ICDServerConfig.h>
#include <lib/support/CHIPMemString.h>
#include <lib/support/CodeUtils.h>
#include <lib/support/logging/CHIPLogging.h>
#include <platform/silabs/wifi/WifiInterface.h>
#include <platform/silabs/wifi/lwip-support/dhcp_client.h>
#include <platform/silabs/wifi/lwip-support/ethernetif.h>
#include <platform/silabs/wifi/wf200/ncp/sl_wfx_board.h>
#include <platform/silabs/wifi/wf200/ncp/sl_wfx_host.h>
#include <platform/silabs/wifi/wf200/ncp/sl_wfx_task.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
using namespace ::chip;
using namespace ::chip::DeviceLayer;
// TODO: This is a workaround because we depend on the platform lib which depends on the platform implementation.
// As such we can't depend on the platform here as well
extern void HandleWFXSystemEvent(sl_wfx_generic_message_t * eventData);
/* wfxRsi Task will use as its stack */
StackType_t wfxEventTaskStack[1024] = { 0 };
/* Structure that will hold the TCB of the wfxRsi Task being created. */
StaticTask_t wfxEventTaskBuffer;
/* Declare a variable to hold the data associated with the created event group. */
StaticEventGroup_t wfxEventGroup;
EventGroupHandle_t sl_wfx_event_group;
TaskHandle_t wfx_events_task_handle;
static MacAddress ap_mac;
static uint32_t sta_ip;
static wfx_wifi_scan_result_t ap_info;
// Set Scan Parameters
#define ACTIVE_CHANNEL_TIME 110
#define PASSIVE_CHANNEL_TIME 0
#define NUM_PROBE_REQUEST 2
/* Wi-Fi bitmask events - for the task */
#define SL_WFX_CONNECT (1 << 1)
#define SL_WFX_DISCONNECT (1 << 2)
#define SL_WFX_START_AP (1 << 3)
#define SL_WFX_STOP_AP (1 << 4)
#define SL_WFX_SCAN_START (1 << 5)
#define SL_WFX_SCAN_COMPLETE (1 << 6)
#define SL_WFX_RETRY_CONNECT (1 << 7)
#define WLAN_TASK_STACK_SIZE (1024)
#define ETH_FRAME (0)
#define AP_START_SUCCESS (0)
#define BITS_TO_WAIT (0)
#define BEACON_1 (0)
#define CHANNEL_LIST ((const uint8_t *) 0)
#define CHANNEL_COUNT (0)
#define IE_DATA ((const uint8_t *) 0)
#define IE_DATA_LENGTH (0)
#define BSSID_SCAN ((const uint8_t *) 0)
#define CHANNEL_0 (0)
#define PREVENT_ROAMING (1)
#define DISABLE_PMF_MODE (0)
#define STA_IP_FAIL (0)
#define WLAN_TASK_PRIORITY (1)
#ifdef SL_WFX_CONFIG_SOFTAP
// Connection parameters
char softap_ssid[32] = SOFTAP_SSID_DEFAULT;
char softap_passkey[64] = SOFTAP_PASSKEY_DEFAULT;
sl_wfx_security_mode_t softap_security = SOFTAP_SECURITY_DEFAULT;
uint8_t softap_channel = SOFTAP_CHANNEL_DEFAULT;
#endif
/* station network interface structures */
struct netif * sta_netif;
wfx_wifi_provision_t wifi_provision;
#define PUT_COUNTER(name) ChipLogDetail(DeviceLayer, "%-24s %lu", #name, (unsigned long) counters->body.count_##name);
bool hasNotifiedWifiConnectivity = false;
static uint8_t retryJoin = 0;
bool retryInProgress = false;
static struct scan_result_holder
{
struct scan_result_holder * next;
wfx_wifi_scan_result scan;
} * scan_save;
static uint8_t scan_count = 0;
static ScanCallback scan_cb; /* user-callback - when scan is done */
static uint8_t * scan_ssid = nullptr; /* Which one are we scanning for */
static size_t scan_ssid_length = 0;
static void sl_wfx_scan_result_callback(sl_wfx_scan_result_ind_body_t * scan_result);
static void sl_wfx_scan_complete_callback(uint32_t status);
static sl_status_t wfx_wifi_hw_start(void);
static void wfx_events_task(void * p_arg);
/* WF200 host callbacks */
static void sl_wfx_connect_callback(sl_wfx_connect_ind_body_t connect_indication_body);
static void sl_wfx_disconnect_callback(uint8_t * mac, uint16_t reason);
static void sl_wfx_generic_status_callback(sl_wfx_generic_ind_t * frame);
#ifdef SL_WFX_CONFIG_SOFTAP
static void sl_wfx_start_ap_callback(uint32_t status);
static void sl_wfx_stop_ap_callback(void);
static void sl_wfx_client_connected_callback(uint8_t * mac);
static void sl_wfx_ap_client_disconnected_callback(uint32_t status, uint8_t * mac);
static void sl_wfx_ap_client_rejected_callback(uint32_t status, uint8_t * mac);
#endif
extern uint32_t gOverrunCount;
namespace {
// wfx_fmac_driver context
sl_wfx_context_t wifiContext;
chip::BitFlags<WifiState> wifi_extra;
typedef struct __attribute__((__packed__)) sl_wfx_get_counters_cnf_body_s
{
uint32_t status;
uint16_t mib_id;
uint16_t length;
uint32_t rcpi;
uint32_t count_plcp_errors;
uint32_t count_fcs_errors;
uint32_t count_tx_packets;
uint32_t count_rx_packets;
uint32_t count_rx_packet_errors;
uint32_t count_rx_decryption_failures;
uint32_t count_rx_mic_failures;
uint32_t count_rx_no_key_failures;
uint32_t count_tx_multicast_frames;
uint32_t count_tx_frames_success;
uint32_t count_tx_frame_failures;
uint32_t count_tx_frames_retried;
uint32_t count_tx_frames_multi_retried;
uint32_t count_rx_frame_duplicates;
uint32_t count_rts_success;
uint32_t count_rts_failures;
uint32_t count_ack_failures;
uint32_t count_rx_multicast_frames;
uint32_t count_rx_frames_success;
uint32_t count_rx_cmacicv_errors;
uint32_t count_rx_cmac_replays;
uint32_t count_rx_mgmt_ccmp_replays;
uint32_t count_rx_bipmic_errors;
uint32_t count_rx_beacon;
uint32_t count_miss_beacon;
uint32_t reserved[15];
} sl_wfx_get_counters_cnf_body_t;
typedef struct __attribute__((__packed__)) sl_wfx_get_counters_cnf_s
{
/** Common message header. */
sl_wfx_header_t header;
/** Confirmation message body. */
sl_wfx_get_counters_cnf_body_t body;
} sl_wfx_get_counters_cnf_t;
typedef struct __attribute__((__packed__)) sl_wfx_mib_req_body_s
{
uint16_t mib_id; ///< ID of the MIB to be read.
uint16_t reserved;
} sl_wfx_mib_req_body_t;
typedef struct __attribute__((__packed__)) sl_wfx_header_mib_s
{
uint16_t length; ///< Message length in bytes including this uint16_t.
///< Maximum value is 8188 but maximum Request size is FW dependent and reported in the
///< ::sl_wfx_startup_ind_body_t::size_inp_ch_buf.
uint8_t id; ///< Contains the message Id indexed by sl_wfx_general_commands_ids_t or sl_wfx_message_ids_t.
uint8_t reserved : 1;
uint8_t interface : 2;
uint8_t seqnum : 3;
uint8_t encrypted : 2;
} sl_wfx_header_mib_t;
typedef struct __attribute__((__packed__)) sl_wfx_mib_req_s
{
/** Common message header. */
sl_wfx_header_mib_t header;
/** Request message body. */
sl_wfx_mib_req_body_t body;
} sl_wfx_mib_req_t;
sl_wfx_get_counters_cnf_t * counters;
sl_status_t get_all_counters(void)
{
sl_status_t result;
uint8_t command_id = 0x05;
uint16_t mib_id = 0x2035;
sl_wfx_mib_req_t * request = nullptr;
uint32_t request_length = SL_WFX_ROUND_UP_EVEN(sizeof(sl_wfx_header_mib_t) + sizeof(sl_wfx_mib_req_body_t));
result =
sl_wfx_allocate_command_buffer((sl_wfx_generic_message_t **) &request, command_id, SL_WFX_CONTROL_BUFFER, request_length);
VerifyOrReturnError(request != nullptr, SL_STATUS_NULL_POINTER);
request->body.mib_id = mib_id;
request->header.interface = 0x2;
request->header.encrypted = 0x0;
result = sl_wfx_send_request(command_id, (sl_wfx_generic_message_t *) request, request_length);
SL_WFX_ERROR_CHECK(result);
result = sl_wfx_host_wait_for_confirmation(command_id, SL_WFX_DEFAULT_REQUEST_TIMEOUT_MS, (void **) &counters);
SL_WFX_ERROR_CHECK(result);
ChipLogDetail(DeviceLayer, "%-24s %12s ", "", "Debug Counters Content");
ChipLogDetail(DeviceLayer, "%-24s %lu", "rcpi", (unsigned long) counters->body.rcpi);
PUT_COUNTER(plcp_errors);
PUT_COUNTER(fcs_errors);
PUT_COUNTER(tx_packets);
PUT_COUNTER(rx_packets);
PUT_COUNTER(rx_packet_errors);
PUT_COUNTER(rx_decryption_failures);
PUT_COUNTER(rx_mic_failures);
PUT_COUNTER(rx_no_key_failures);
PUT_COUNTER(tx_multicast_frames);
PUT_COUNTER(tx_frames_success);
PUT_COUNTER(tx_frame_failures);
PUT_COUNTER(tx_frames_retried);
PUT_COUNTER(tx_frames_multi_retried);
PUT_COUNTER(rx_frame_duplicates);
PUT_COUNTER(rts_success);
PUT_COUNTER(rts_failures);
PUT_COUNTER(ack_failures);
PUT_COUNTER(rx_multicast_frames);
PUT_COUNTER(rx_frames_success);
PUT_COUNTER(rx_cmacicv_errors);
PUT_COUNTER(rx_cmac_replays);
PUT_COUNTER(rx_mgmt_ccmp_replays);
PUT_COUNTER(rx_bipmic_errors);
PUT_COUNTER(rx_beacon);
PUT_COUNTER(miss_beacon);
error_handler:
if (result == SL_STATUS_TIMEOUT)
{
if (sl_wfx_context->used_buffers > 0)
{
sl_wfx_context->used_buffers--;
}
}
if (request != nullptr)
{
sl_wfx_free_command_buffer((sl_wfx_generic_message_t *) request, command_id, SL_WFX_CONTROL_BUFFER);
}
return result;
}
/**
* @brief Convert RCPI to RSSI
* This function converts the Received Channel Power Indicator (RCPI) value to
* the Received Signal Strength Indicator (RSSI) value. If the result of the
* conversion exceeds the range of int16_t, it will be clamped to the maximum
* or minimum value of int16_t.
* @param[in] rcpi: Received Channel Power Indicator value
* @return RSSI value
*/
inline int16_t ConvertRcpiToRssi(uint32_t rcpi)
{
int64_t rssi = (rcpi / 2) - 110;
// Checking for overflows
VerifyOrReturnValue(rssi < std::numeric_limits<int16_t>::max(), std::numeric_limits<int16_t>::max());
VerifyOrReturnValue(rssi > std::numeric_limits<int16_t>::min(), std::numeric_limits<int16_t>::min());
return rssi;
}
} // namespace
CHIP_ERROR GetMacAddress(sl_wfx_interface_t interface, MutableByteSpan & address)
{
VerifyOrReturnError(address.size() >= kWifiMacAddressLength, CHIP_ERROR_BUFFER_TOO_SMALL);
#ifdef SL_WFX_CONFIG_SOFTAP
chip::ByteSpan byteSpan((interface == SL_WFX_SOFTAP_INTERFACE) ? wifiContext.mac_addr_1.octet : wifiContext.mac_addr_0.octet);
#else
chip::ByteSpan byteSpan(wifiContext.mac_addr_0.octet);
#endif
return CopySpanToMutableSpan(byteSpan, address);
}
CHIP_ERROR StartNetworkScan(chip::ByteSpan ssid, ScanCallback callback)
{
VerifyOrReturnError(callback != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
// 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);
// Make sure memory is cleared before starting a new scan
if (scan_ssid)
{
chip::Platform::MemoryFree(scan_ssid);
scan_ssid = nullptr;
}
if (ssid.empty())
{
scan_ssid_length = 0;
scan_ssid = nullptr;
}
else
{
scan_ssid_length = ssid.size();
scan_ssid = reinterpret_cast<uint8_t *>(chip::Platform::MemoryAlloc(scan_ssid_length));
VerifyOrReturnError(scan_ssid != nullptr, CHIP_ERROR_NO_MEMORY);
chip::MutableByteSpan scannedSsidSpan(scan_ssid, WFX_MAX_SSID_LENGTH);
chip::CopySpanToMutableSpan(ssid, scannedSsidSpan);
}
scan_cb = callback;
xEventGroupSetBits(sl_wfx_event_group, SL_WFX_SCAN_START);
return CHIP_NO_ERROR;
}
CHIP_ERROR StartWifiTask()
{
if (wifi_extra.Has(WifiState::kStationInit))
{
ChipLogDetail(DeviceLayer, "WIFI: Already started");
return CHIP_NO_ERROR;
}
wifi_extra.Set(WifiState::kStationInit);
VerifyOrReturnError(wfx_soft_init() == SL_STATUS_OK, CHIP_ERROR_INTERNAL,
ChipLogError(DeviceLayer, "Failed to execute the WFX software init."));
VerifyOrReturnError(wfx_wifi_hw_start() == SL_STATUS_OK, CHIP_ERROR_INTERNAL,
ChipLogError(DeviceLayer, "Failed to execute the WFX HW start."));
return CHIP_NO_ERROR;
}
void ConfigureStationMode()
{
wifi_extra.Set(WifiState::kStationMode);
}
bool IsStationModeEnabled(void)
{
return wifi_extra.Has(WifiState::kStationMode);
}
bool IsStationConnected()
{
return wifi_extra.Has(WifiState::kStationConnected);
}
bool IsStationReady()
{
return wifi_extra.Has(WifiState::kStationInit);
}
CHIP_ERROR TriggerDisconnection(void)
{
ChipLogProgress(DeviceLayer, "STA-Disconnecting");
sl_status_t status = sl_wfx_send_disconnect_command();
VerifyOrReturnError(status == SL_STATUS_OK, CHIP_ERROR_INTERNAL);
wifi_extra.Clear(WifiState::kStationConnected);
xEventGroupSetBits(sl_wfx_event_group, SL_WFX_RETRY_CONNECT);
return CHIP_NO_ERROR;
}
CHIP_ERROR GetAccessPointInfo(wfx_wifi_scan_result_t & info)
{
uint32_t signal_strength = 0;
// TODO: The ap_info.ssid isn't populated anywhere. The returned value is always 0.
chip::ByteSpan apSsidSpan(ap_info.ssid, ap_info.ssid_length);
chip::MutableByteSpan apSsidMutableSpan(info.ssid, WFX_MAX_SSID_LENGTH);
chip::CopySpanToMutableSpan(apSsidSpan, apSsidMutableSpan);
info.ssid_length = apSsidMutableSpan.size();
// TODO: The ap_info.bssid isn't populated anywhere. The returned value is always 0.
chip::ByteSpan apBssidSpan(ap_info.bssid, kWifiMacAddressLength);
chip::MutableByteSpan apBssidMutableSpan(info.bssid, kWifiMacAddressLength);
chip::CopySpanToMutableSpan(apBssidSpan, apBssidMutableSpan);
info.security = ap_info.security;
info.chan = ap_info.chan;
sl_status_t status = sl_wfx_get_signal_strength(&signal_strength);
VerifyOrReturnError(status == SL_STATUS_OK, CHIP_ERROR_INTERNAL);
info.rssi = ConvertRcpiToRssi(signal_strength);
ChipLogDetail(DeviceLayer, "WIFI:SSID : %s", ap_info.ssid);
ChipLogDetail(DeviceLayer, "WIFI:BSSID : %02x:%02x:%02x:%02x:%02x:%02x", ap_info.bssid[0], ap_info.bssid[1],
ap_info.bssid[2], ap_info.bssid[3], ap_info.bssid[4], ap_info.bssid[5]);
ChipLogDetail(DeviceLayer, "WIFI:security : %d", info.security);
ChipLogDetail(DeviceLayer, "WIFI:channel : %d", info.chan);
ChipLogDetail(DeviceLayer, "signal_strength: %ld", signal_strength);
return CHIP_NO_ERROR;
}
CHIP_ERROR GetAccessPointExtendedInfo(wfx_wifi_scan_ext_t & info)
{
sl_status_t status = get_all_counters();
VerifyOrReturnError(status == SL_STATUS_OK, CHIP_ERROR_INTERNAL, ChipLogError(DeviceLayer, "Failed to get the couters"));
info.beacon_lost_count = counters->body.count_miss_beacon;
info.beacon_rx_count = counters->body.count_rx_beacon;
info.mcast_rx_count = counters->body.count_rx_multicast_frames;
info.mcast_tx_count = counters->body.count_tx_multicast_frames;
info.ucast_rx_count = counters->body.count_rx_packets;
info.ucast_tx_count = counters->body.count_tx_packets;
info.overrun_count = gOverrunCount;
return CHIP_NO_ERROR;
}
/***************************************************************************
* @brief
* Creates WFX events processing task.
******************************************************************************/
static void wfx_events_task_start(void)
{
/* create an event group to track Wi-Fi events */
sl_wfx_event_group = xEventGroupCreateStatic(&wfxEventGroup);
wfx_events_task_handle = xTaskCreateStatic(wfx_events_task, "wfx_events", WLAN_TASK_STACK_SIZE, NULL, WLAN_TASK_PRIORITY,
wfxEventTaskStack, &wfxEventTaskBuffer);
if (NULL == wfx_events_task_handle)
{
ChipLogError(DeviceLayer, "Failed to create WFX wfx_events");
}
}
/****************************************************************************
* @brief
* Called when the driver needs to post an event
* @param[in] event_payload:
* @returns Returns SL_STATUS_OK if successful,
*SL_STATUS_FAIL otherwise
*****************************************************************************/
extern "C" sl_status_t sl_wfx_host_process_event(sl_wfx_generic_message_t * event_payload)
{
switch (event_payload->header.id)
{
/******** INDICATION ********/
case SL_WFX_STARTUP_IND_ID: {
ChipLogProgress(DeviceLayer, "startup completed.");
HandleWFXSystemEvent(event_payload);
break;
}
case SL_WFX_CONNECT_IND_ID: {
sl_wfx_connect_ind_t * connect_indication = (sl_wfx_connect_ind_t *) event_payload;
sl_wfx_connect_callback(connect_indication->body);
break;
}
case SL_WFX_DISCONNECT_IND_ID: {
sl_wfx_disconnect_ind_t * disconnect_indication = (sl_wfx_disconnect_ind_t *) event_payload;
sl_wfx_disconnect_callback(disconnect_indication->body.mac, disconnect_indication->body.reason);
break;
}
case SL_WFX_RECEIVED_IND_ID: {
sl_wfx_received_ind_t * ethernet_frame = (sl_wfx_received_ind_t *) event_payload;
if (ethernet_frame->body.frame_type == ETH_FRAME)
{
sl_wfx_host_received_frame_callback(ethernet_frame);
}
break;
}
case SL_WFX_SCAN_RESULT_IND_ID: {
sl_wfx_scan_result_ind_t * scan_result = (sl_wfx_scan_result_ind_t *) event_payload;
sl_wfx_scan_result_callback(&scan_result->body);
break;
}
case SL_WFX_SCAN_COMPLETE_IND_ID: {
sl_wfx_scan_complete_ind_t * scan_complete = (sl_wfx_scan_complete_ind_t *) event_payload;
sl_wfx_scan_complete_callback(scan_complete->body.status);
break;
}
#ifdef SL_WFX_CONFIG_SOFTAP
case SL_WFX_START_AP_IND_ID: {
sl_wfx_start_ap_ind_t * start_ap_indication = (sl_wfx_start_ap_ind_t *) event_payload;
sl_wfx_start_ap_callback(start_ap_indication->body.status);
break;
}
case SL_WFX_STOP_AP_IND_ID: {
sl_wfx_stop_ap_callback();
break;
}
case SL_WFX_AP_CLIENT_CONNECTED_IND_ID: {
sl_wfx_ap_client_connected_ind_t * client_connected_indication = (sl_wfx_ap_client_connected_ind_t *) event_payload;
sl_wfx_client_connected_callback(client_connected_indication->body.mac);
break;
}
case SL_WFX_AP_CLIENT_REJECTED_IND_ID: {
sl_wfx_ap_client_rejected_ind_t * ap_client_rejected_indication = (sl_wfx_ap_client_rejected_ind_t *) event_payload;
sl_wfx_ap_client_rejected_callback(ap_client_rejected_indication->body.reason, ap_client_rejected_indication->body.mac);
break;
}
case SL_WFX_AP_CLIENT_DISCONNECTED_IND_ID: {
sl_wfx_ap_client_disconnected_ind_t * ap_client_disconnected_indication =
(sl_wfx_ap_client_disconnected_ind_t *) event_payload;
sl_wfx_ap_client_disconnected_callback(ap_client_disconnected_indication->body.reason,
ap_client_disconnected_indication->body.mac);
break;
}
#endif /* SL_WFX_CONFIG_SOFTAP */
#ifdef SL_WFX_USE_SECURE_LINK
case SL_WFX_SECURELINK_EXCHANGE_PUB_KEYS_IND_ID: {
if (host_context.waited_event_id != SL_WFX_SECURELINK_EXCHANGE_PUB_KEYS_IND_ID)
{
memcpy((void *) &sl_wfx_context->secure_link_exchange_ind, (void *) event_payload, event_payload->header.length);
}
break;
}
#endif
case SL_WFX_GENERIC_IND_ID: {
sl_wfx_generic_ind_t * generic_status = (sl_wfx_generic_ind_t *) event_payload;
sl_wfx_generic_status_callback(generic_status);
break;
}
case SL_WFX_EXCEPTION_IND_ID: {
sl_wfx_exception_ind_t * firmware_exception = (sl_wfx_exception_ind_t *) event_payload;
ChipLogError(DeviceLayer, "event: SL_WFX_EXCEPTION_IND_ID");
ChipLogError(DeviceLayer, "firmware_exception->header.length: %d", firmware_exception->header.length);
// create a bytespan header.length with exception payload
ByteSpan exception_byte_span = ByteSpan((uint8_t *) firmware_exception, firmware_exception->header.length);
ChipLogByteSpan(DeviceLayer, exception_byte_span);
break;
}
case SL_WFX_ERROR_IND_ID: {
sl_wfx_error_ind_t * firmware_error = (sl_wfx_error_ind_t *) event_payload;
ChipLogError(DeviceLayer, "event: SL_WFX_ERROR_IND_ID");
ChipLogError(DeviceLayer, "firmware_error->type: %lu", firmware_error->body.type);
ChipLogError(DeviceLayer, "firmware_error->header.length: %d", firmware_error->header.length);
// create a bytespan header.length with error payload
ByteSpan error_byte_span = ByteSpan((uint8_t *) firmware_error, firmware_error->header.length);
ChipLogByteSpan(DeviceLayer, error_byte_span);
break;
}
}
return SL_STATUS_OK;
}
/****************************************************************************
* @brief
* Callback for individual scan result
* @param[in] scan_result: Scan result of all SSID's
*****************************************************************************/
static void sl_wfx_scan_result_callback(sl_wfx_scan_result_ind_body_t * scan_result)
{
ChipLogDetail(DeviceLayer, "# %2d %2d %03d %02X:%02X:%02X:%02X:%02X:%02X %s", scan_count, scan_result->channel,
(ConvertRcpiToRssi(scan_result->rcpi)), scan_result->mac[0], scan_result->mac[1], scan_result->mac[2],
scan_result->mac[3], scan_result->mac[4], scan_result->mac[5], scan_result->ssid_def.ssid);
chip::ByteSpan requestedSsid(scan_ssid, scan_ssid_length);
chip::ByteSpan scannedSsid(scan_result->ssid_def.ssid, scan_result->ssid_def.ssid_length);
// Verify that there was no requested SSID or that the SSID matches the requested SSID
VerifyOrReturn(requestedSsid.empty() || requestedSsid.data_equal(scannedSsid));
struct scan_result_holder * ap = reinterpret_cast<struct scan_result_holder *>(chip::Platform::MemoryAlloc(sizeof(*ap)));
VerifyOrReturn(ap != nullptr, ChipLogError(DeviceLayer, "Scan Callback: No Memory for scanned network."));
// Add Scan to the linked list
ap->next = scan_save;
scan_save = ap;
// Copy scanned SSID to the output buffer
chip::MutableByteSpan outputSsid(ap->scan.ssid, WFX_MAX_SSID_LENGTH);
chip::CopySpanToMutableSpan(scannedSsid, outputSsid);
ap->scan.ssid_length = outputSsid.size();
// Set Network Security - We start by WPA3 to set the most secure type
ap->scan.security = WFX_SEC_UNSPECIFIED;
if (scan_result->security_mode.wpa3)
{
ap->scan.security = WFX_SEC_WPA3;
}
else if (scan_result->security_mode.wpa2)
{
ap->scan.security = WFX_SEC_WPA2;
}
else if (scan_result->security_mode.wpa)
{
ap->scan.security = WFX_SEC_WPA;
}
else if (scan_result->security_mode.wep)
{
ap->scan.security = WFX_SEC_WEP;
}
else
{
ap->scan.security = WFX_SEC_NONE;
}
ap->scan.chan = scan_result->channel;
ap->scan.rssi = ConvertRcpiToRssi(scan_result->rcpi);
chip::ByteSpan scannedBssid(scan_result->mac, kWifiMacAddressLength);
chip::MutableByteSpan outputBssid(ap->scan.bssid, kWifiMacAddressLength);
chip::CopySpanToMutableSpan(scannedBssid, outputBssid);
scan_count++;
}
/****************************************************************************
* @brief
* Callback for scan complete
* @param[in] status:Status of WLAN scan api
*****************************************************************************/
/* ARGSUSED */
static void sl_wfx_scan_complete_callback(uint32_t status)
{
(void) (status);
/* Use scan_count value and reset it */
xEventGroupSetBits(sl_wfx_event_group, SL_WFX_SCAN_COMPLETE);
}
/****************************************************************************
* @brief
* Callback when station connects
* @param[in] mac: MAC address of device
* @param[in] status: Status of connect call
*****************************************************************************/
static void sl_wfx_connect_callback(sl_wfx_connect_ind_body_t connect_indication_body)
{
uint8_t * mac = connect_indication_body.mac;
uint32_t status = connect_indication_body.status;
ap_info.chan = connect_indication_body.channel;
memcpy(&ap_info.security, &wifi_provision.security, sizeof(wifi_provision.security));
switch (status)
{
case WFM_STATUS_SUCCESS: {
ChipLogProgress(DeviceLayer, "STA-Connected");
memcpy(ap_mac.data(), mac, kWifiMacAddressLength);
wifi_extra.Set(WifiState::kStationConnected);
xEventGroupSetBits(sl_wfx_event_group, SL_WFX_CONNECT);
break;
}
case WFM_STATUS_NO_MATCHING_AP: {
ChipLogError(DeviceLayer, "Connection failed, access point not found");
break;
}
case WFM_STATUS_CONNECTION_ABORTED: {
ChipLogError(DeviceLayer, "Connection aborted");
break;
}
case WFM_STATUS_CONNECTION_TIMEOUT: {
ChipLogError(DeviceLayer, "Connection timeout");
break;
}
case WFM_STATUS_CONNECTION_REJECTED_BY_AP: {
ChipLogError(DeviceLayer, "Connection rejected by the access point");
break;
}
case WFM_STATUS_CONNECTION_AUTH_FAILURE: {
ChipLogError(DeviceLayer, "Connection authentication failure");
break;
}
default: {
ChipLogError(DeviceLayer, "Connection attempt error");
}
}
if (status != WFM_STATUS_SUCCESS)
{
retryJoin += 1;
retryInProgress = false;
ChipLogProgress(DeviceLayer, "Retry to connect to network count: %d", retryJoin);
wfx_retry_connection(retryJoin);
}
}
/****************************************************************************
* @brief
* Callback for station disconnect
* @param[in] mac: MAC address of device
* @param[in] reason: Reason code of disconnection
*****************************************************************************/
static void sl_wfx_disconnect_callback(uint8_t * mac, uint16_t reason)
{
(void) (mac);
ChipLogProgress(DeviceLayer, "Disconnected %d", reason);
wifi_extra.Clear(WifiState::kStationConnected);
retryInProgress = false;
wfx_retry_connection(retryJoin);
}
#ifdef SL_WFX_CONFIG_SOFTAP
/****************************************************************************
* @brief
* Callback for AP started
* @param[in] status: Status of wfx start ap api
*****************************************************************************/
static void sl_wfx_start_ap_callback(uint32_t status)
{
VerifyOrReturnLogError(status == AP_START_SUCCESS, CHIP_ERROR_INTERNAL);
wifi_extra.Set(WifiState::kAPReady);
xEventGroupSetBits(sl_wfx_event_group, SL_WFX_START_AP);
}
/****************************************************************************
* @brief
* Callback for AP stopped
*****************************************************************************/
static void sl_wfx_stop_ap_callback(void)
{
// TODO
// dhcpserver_clear_stored_mac();
ChipLogProgress(DeviceLayer, "SoftAP stopped");
wifi_extra.Clear(WifiState::kAPReady);
xEventGroupSetBits(sl_wfx_event_group, SL_WFX_STOP_AP);
}
/****************************************************************************
* @brief
* Callback for client connect to AP
* @param[in] mac: MAC adress of device
*****************************************************************************/
static void sl_wfx_client_connected_callback(uint8_t * mac)
{
ChipLogProgress(DeviceLayer, "Client connected, MAC: %02X:%02X:%02X:%02X:%02X:%02X", mac[0], mac[1], mac[2], mac[3], mac[4],
mac[5]);
}
/****************************************************************************
* @brief
* Callback for client rejected from AP
* @param[in] status: Status of ap rejected
* @param[in] mac: MAC adress of device
*****************************************************************************/
static void sl_wfx_ap_client_rejected_callback(uint32_t status, uint8_t * mac)
{
ChipLogError(DeviceLayer, "Client rejected, reason: %d, MAC: %02X:%02X:%02X:%02X:%02X:%02X", (int) status, mac[0], mac[1],
mac[2], mac[3], mac[4], mac[5]);
}
/****************************************************************************
* @brief
* Callback for AP client disconnect
* @param[in] status: Status of ap dissconnect
* @param[in] mac:
*****************************************************************************/
static void sl_wfx_ap_client_disconnected_callback(uint32_t status, uint8_t * mac)
{
ChipLogError(DeviceLayer, "Client disconnected, reason: %d, MAC: %02X:%02X:%02X:%02X:%02X:%02X", (int) status, mac[0], mac[1],
mac[2], mac[3], mac[4], mac[5]);
}
#endif /* SL_WFX_CONFIG_SOFTAP */
/****************************************************************************
* @brief
* Callback for generic status received
* @param[in] farme:
*****************************************************************************/
static void sl_wfx_generic_status_callback(sl_wfx_generic_ind_t * frame)
{
(void) (frame);
}
/***************************************************************************
* @brief
* WFX events processing task.
* @param[in] p_arg:
* ******************************************************************************/
static void wfx_events_task(void * p_arg)
{
TickType_t last_dhcp_poll, now;
EventBits_t flags;
(void) p_arg;
sta_netif = wfx_get_netif(SL_WFX_STA_INTERFACE);
last_dhcp_poll = xTaskGetTickCount();
while (true)
{
flags = xEventGroupWaitBits(sl_wfx_event_group,
SL_WFX_CONNECT | SL_WFX_DISCONNECT
#ifdef SL_WFX_CONFIG_SOFTAP
| SL_WFX_START_AP | SL_WFX_STOP_AP
#endif /* SL_WFX_CONFIG_SOFTAP */
| SL_WFX_SCAN_START | SL_WFX_SCAN_COMPLETE | BITS_TO_WAIT,
pdTRUE, pdFALSE, pdMS_TO_TICKS(250)); /* 250 msec delay converted to ticks */
if (flags & SL_WFX_RETRY_CONNECT)
{
ChipLogProgress(DeviceLayer, "sending the connect command");
wfx_connect_to_ap();
}
if (wifi_extra.Has(WifiState::kStationConnected))
{
if ((now = xTaskGetTickCount()) > (last_dhcp_poll + pdMS_TO_TICKS(250)))
{
#if (CHIP_DEVICE_CONFIG_ENABLE_IPV4)
uint8_t dhcp_state = dhcpclient_poll(sta_netif);
if ((dhcp_state == DHCP_ADDRESS_ASSIGNED) && !HasNotifiedIPv4Change())
{
wfx_dhcp_got_ipv4((uint32_t) sta_netif->ip_addr.u_addr.ip4.addr);
NotifyIPv4Change(true);
if (!hasNotifiedWifiConnectivity)
{
ChipLogProgress(DeviceLayer, "will notify WiFi connectivity");
NotifyConnection(ap_mac);
hasNotifiedWifiConnectivity = true;
}
}
else if (dhcp_state == DHCP_OFF)
{
NotifyIPv4Change(false);
}
#endif // CHIP_DEVICE_CONFIG_ENABLE_IPV4
if ((ip6_addr_ispreferred(netif_ip6_addr_state(sta_netif, 0))) && !HasNotifiedIPv6Change())
{
NotifyIPv6Change(true);
if (!hasNotifiedWifiConnectivity)
{
NotifyConnection(ap_mac);
hasNotifiedWifiConnectivity = true;
}
}
last_dhcp_poll = now;
}
}
if (flags & SL_WFX_CONNECT)
{
#if (CHIP_DEVICE_CONFIG_ENABLE_IPV4)
NotifyIPv4Change(false);
#endif // CHIP_DEVICE_CONFIG_ENABLE_IPV4
NotifyIPv6Change(false);
hasNotifiedWifiConnectivity = false;
ChipLogProgress(DeviceLayer, "connected to AP");
wifi_extra.Set(WifiState::kStationConnected);
retryJoin = 0;
wfx_lwip_set_sta_link_up();
#if CHIP_CONFIG_ENABLE_ICD_SERVER
if (!(wifi_extra.Has(WifiState::kAPReady)))
{
// Enable the power save
ChipLogProgress(DeviceLayer, "WF200 going to DTIM based sleep");
sl_wfx_set_power_mode(WFM_PM_MODE_DTIM, WFM_PM_POLL_FAST_PS, BEACON_1, 0 /*timeout*/);
sl_wfx_enable_device_power_save();
}
#endif // CHIP_CONFIG_ENABLE_ICD_SERVER
}
if (flags & SL_WFX_DISCONNECT)
{
#if (CHIP_DEVICE_CONFIG_ENABLE_IPV4)
NotifyIPv4Change(false);
#endif // CHIP_DEVICE_CONFIG_ENABLE_IPV4
NotifyIPv6Change(false);
hasNotifiedWifiConnectivity = false;
wifi_extra.Clear(WifiState::kStationConnected);
wfx_lwip_set_sta_link_down();
}
if (flags & SL_WFX_SCAN_START)
{
// Start the Scan
sl_wfx_ssid_def_t ssid = { 0 };
sl_wfx_ssid_def_t * ssidPtr = nullptr;
uint16_t nbreScannedNetworks = 0;
if (scan_ssid)
{
chip::ByteSpan requestedSsid(scan_ssid, scan_ssid_length);
chip::MutableByteSpan outputSsid(ssid.ssid, WFX_MAX_SSID_LENGTH);
chip::CopySpanToMutableSpan(requestedSsid, outputSsid);
ssid.ssid_length = outputSsid.size();
nbreScannedNetworks = 1;
ssidPtr = &ssid;
}
else
{
nbreScannedNetworks = 0;
ssidPtr = nullptr;
}
ChipLogDetail(DeviceLayer,
"WIFI Scan Paramter set to Active channel time %d, Passive "
"Channel Time: %d, Number of prob: %d",
ACTIVE_CHANNEL_TIME, PASSIVE_CHANNEL_TIME, NUM_PROBE_REQUEST);
(void) sl_wfx_set_scan_parameters(ACTIVE_CHANNEL_TIME, PASSIVE_CHANNEL_TIME, NUM_PROBE_REQUEST);
(void) sl_wfx_send_scan_command(WFM_SCAN_MODE_ACTIVE, CHANNEL_LIST, /* Channel list */
CHANNEL_COUNT, /* Scan all chans */
ssidPtr, nbreScannedNetworks, IE_DATA, /* IE we're looking for */
IE_DATA_LENGTH, BSSID_SCAN);
}
if (flags & SL_WFX_SCAN_COMPLETE)
{
struct scan_result_holder *hp, *next;
ChipLogDetail(DeviceLayer, "WIFI: Return %d scan results", scan_count);
for (hp = scan_save; hp; hp = next)
{
next = hp->next;
scan_cb(&hp->scan);
chip::Platform::MemoryFree(hp);
}
scan_cb(nullptr);
// Clean up
scan_save = nullptr;
scan_count = 0;
if (scan_ssid)
{
chip::Platform::MemoryFree(scan_ssid);
scan_ssid = NULL;
}
scan_cb = nullptr;
}
}
}
/****************************************************************************
* @brief
* Initialize the WF200 used by the two interfaces
*****************************************************************************/
static sl_status_t wfx_init(void)
{
/* Initialize the WF200 used by the two interfaces */
wfx_events_task_start();
sl_status_t status = sl_wfx_init(&wifiContext);
ChipLogProgress(DeviceLayer, "FMAC Driver version: %s", FMAC_DRIVER_VERSION_STRING);
switch (status)
{
case SL_STATUS_OK:
ChipLogProgress(DeviceLayer, "WF200 FW ver:%d.%d.%d [MAC %02x:%02x:%02x-%02x:%02x:%02x]", wifiContext.firmware_major,
wifiContext.firmware_minor, wifiContext.firmware_build, wifiContext.mac_addr_0.octet[0],
wifiContext.mac_addr_0.octet[1], wifiContext.mac_addr_0.octet[2], wifiContext.mac_addr_0.octet[3],
wifiContext.mac_addr_0.octet[4], wifiContext.mac_addr_0.octet[5]);
ChipLogProgress(DeviceLayer, "WF200 Init OK");
if (wifi_extra.Has(WifiState::kStationConnected))
{
sl_wfx_send_disconnect_command();
}
break;
case SL_STATUS_WIFI_INVALID_KEY:
ChipLogError(DeviceLayer, "WF200: F/W keyset invalid");
break;
case SL_STATUS_WIFI_FIRMWARE_DOWNLOAD_TIMEOUT:
ChipLogError(DeviceLayer, "WF200: F/W download timo");
break;
case SL_STATUS_TIMEOUT:
ChipLogError(DeviceLayer, "WF200: Poll for value timo");
break;
case SL_STATUS_FAIL:
ChipLogError(DeviceLayer, "WF200: Error");
break;