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/*
*
* Copyright (c) 2021 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 <lib/support/CodeUtils.h>
#include <lib/support/SafeInt.h>
#include <platform/CHIPDeviceLayer.h>
#include <platform/silabs/NetworkCommissioningWiFiDriver.h>
#include <platform/silabs/SilabsConfig.h>
#include <limits>
using namespace ::chip;
using namespace ::chip::DeviceLayer::Internal;
namespace chip {
namespace DeviceLayer {
namespace NetworkCommissioning {
namespace {
NetworkCommissioning::WiFiScanResponse * sScanResult;
SlScanResponseIterator<NetworkCommissioning::WiFiScanResponse> mScanResponseIter(sScanResult);
} // namespace
CHIP_ERROR SlWiFiDriver::Init(NetworkStatusChangeCallback * networkStatusChangeCallback)
{
CHIP_ERROR err;
size_t ssidLen = 0;
size_t credentialsLen = 0;
mpScanCallback = nullptr;
mpConnectCallback = nullptr;
// If reading fails, wifi is not provisioned, no need to go further.
err = SILABSConfig::ReadConfigValueStr(SILABSConfig::kConfigKey_WiFiSSID, mSavedNetwork.ssid, sizeof(mSavedNetwork.ssid),
ssidLen);
VerifyOrReturnError(err == CHIP_NO_ERROR, CHIP_NO_ERROR);
err = SILABSConfig::ReadConfigValueStr(SILABSConfig::kConfigKey_WiFiPSK, mSavedNetwork.credentials,
sizeof(mSavedNetwork.credentials), credentialsLen);
VerifyOrReturnError(err == CHIP_NO_ERROR, CHIP_NO_ERROR);
mSavedNetwork.credentialsLen = credentialsLen;
mSavedNetwork.ssidLen = ssidLen;
mStagingNetwork = mSavedNetwork;
ConnectWiFiNetwork(mSavedNetwork.ssid, ssidLen, mSavedNetwork.credentials, credentialsLen);
return err;
}
CHIP_ERROR SlWiFiDriver::CommitConfiguration()
{
uint8_t securityType = WFX_SEC_WPA2;
ReturnErrorOnFailure(SILABSConfig::WriteConfigValueStr(SILABSConfig::kConfigKey_WiFiSSID, mStagingNetwork.ssid));
ReturnErrorOnFailure(SILABSConfig::WriteConfigValueStr(SILABSConfig::kConfigKey_WiFiPSK, mStagingNetwork.credentials));
ReturnErrorOnFailure(SILABSConfig::WriteConfigValueBin(SILABSConfig::kConfigKey_WiFiSEC, &securityType, sizeof(securityType)));
mSavedNetwork = mStagingNetwork;
return CHIP_NO_ERROR;
}
CHIP_ERROR SlWiFiDriver::RevertConfiguration()
{
mStagingNetwork = mSavedNetwork;
return CHIP_NO_ERROR;
}
bool SlWiFiDriver::NetworkMatch(const WiFiNetwork & network, ByteSpan networkId)
{
return networkId.size() == network.ssidLen && memcmp(networkId.data(), network.ssid, network.ssidLen) == 0;
}
Status SlWiFiDriver::AddOrUpdateNetwork(ByteSpan ssid, ByteSpan credentials, MutableCharSpan & outDebugText,
uint8_t & outNetworkIndex)
{
outDebugText.reduce_size(0);
outNetworkIndex = 0;
VerifyOrReturnError(mStagingNetwork.ssidLen == 0 || NetworkMatch(mStagingNetwork, ssid), Status::kBoundsExceeded);
VerifyOrReturnError(credentials.size() <= sizeof(mStagingNetwork.credentials), Status::kOutOfRange);
VerifyOrReturnError(ssid.size() <= sizeof(mStagingNetwork.ssid), Status::kOutOfRange);
memset(mStagingNetwork.credentials, 0, sizeof(mStagingNetwork.credentials));
memcpy(mStagingNetwork.credentials, credentials.data(), credentials.size());
mStagingNetwork.credentialsLen = static_cast<decltype(mStagingNetwork.credentialsLen)>(credentials.size());
memset(mStagingNetwork.ssid, 0, sizeof(mStagingNetwork.ssid));
memcpy(mStagingNetwork.ssid, ssid.data(), ssid.size());
mStagingNetwork.ssidLen = static_cast<decltype(mStagingNetwork.ssidLen)>(ssid.size());
return Status::kSuccess;
}
Status SlWiFiDriver::RemoveNetwork(ByteSpan networkId, MutableCharSpan & outDebugText, uint8_t & outNetworkIndex)
{
outDebugText.reduce_size(0);
outNetworkIndex = 0;
VerifyOrReturnError(NetworkMatch(mStagingNetwork, networkId), Status::kNetworkIDNotFound);
// Use empty ssid for representing invalid network
mStagingNetwork.ssidLen = 0;
return Status::kSuccess;
}
Status SlWiFiDriver::ReorderNetwork(ByteSpan networkId, uint8_t index, MutableCharSpan & outDebugText)
{
outDebugText.reduce_size(0);
// Only one network is supported for now
VerifyOrReturnError(index == 0, Status::kOutOfRange);
VerifyOrReturnError(NetworkMatch(mStagingNetwork, networkId), Status::kNetworkIDNotFound);
return Status::kSuccess;
}
CHIP_ERROR SlWiFiDriver::ConnectWiFiNetwork(const char * ssid, uint8_t ssidLen, const char * key, uint8_t keyLen)
{
if (ConnectivityMgr().IsWiFiStationProvisioned())
{
ChipLogProgress(DeviceLayer, "Disconecting for current wifi");
int32_t status = wfx_sta_discon();
if (status != 0)
{
return CHIP_ERROR_INTERNAL;
}
}
ReturnErrorOnFailure(ConnectivityMgr().SetWiFiStationMode(ConnectivityManager::kWiFiStationMode_Disabled));
// Set the wifi configuration
wfx_wifi_provision_t wifiConfig = {};
memcpy(wifiConfig.ssid, ssid, ssidLen);
memcpy(wifiConfig.passkey, key, keyLen);
wifiConfig.security = WFX_SEC_WPA_WPA2_MIXED;
ChipLogProgress(NetworkProvisioning, "Setting up connection for WiFi SSID: %.*s", static_cast<int>(ssidLen), ssid);
// Configure the WFX WiFi interface.
wfx_set_wifi_provision(&wifiConfig);
ReturnErrorOnFailure(ConnectivityMgr().SetWiFiStationMode(ConnectivityManager::kWiFiStationMode_Disabled));
ReturnErrorOnFailure(ConnectivityMgr().SetWiFiStationMode(ConnectivityManager::kWiFiStationMode_Enabled));
return CHIP_NO_ERROR;
}
void SlWiFiDriver::OnConnectWiFiNetwork()
{
if (mpConnectCallback)
{
CommitConfiguration();
mpConnectCallback->OnResult(Status::kSuccess, CharSpan(), 0);
mpConnectCallback = nullptr;
}
}
void SlWiFiDriver::ConnectNetwork(ByteSpan networkId, ConnectCallback * callback)
{
CHIP_ERROR err = CHIP_NO_ERROR;
Status networkingStatus = Status::kUnknownError;
VerifyOrExit(NetworkMatch(mStagingNetwork, networkId), networkingStatus = Status::kNetworkIDNotFound);
VerifyOrExit(mpConnectCallback == nullptr, networkingStatus = Status::kUnknownError);
err = ConnectWiFiNetwork(mStagingNetwork.ssid, mStagingNetwork.ssidLen, mStagingNetwork.credentials,
mStagingNetwork.credentialsLen);
if (err == CHIP_NO_ERROR)
{
mpConnectCallback = callback;
networkingStatus = Status::kSuccess;
}
exit:
if (networkingStatus != Status::kSuccess)
{
ChipLogError(NetworkProvisioning, "Failed to connect to WiFi network:%s", chip::ErrorStr(err));
mpConnectCallback = nullptr;
callback->OnResult(networkingStatus, CharSpan(), 0);
}
}
chip::BitFlags<WiFiSecurity> SlWiFiDriver::ConvertSecuritytype(uint8_t security)
{
chip::BitFlags<WiFiSecurity> securityType;
if (security == WFX_SEC_NONE)
{
securityType = WiFiSecurity::kUnencrypted;
}
else if (security & WFX_SEC_WEP)
{
securityType = WiFiSecurity::kWepPersonal;
}
else if (security & WFX_SEC_WPA)
{
securityType = WiFiSecurity::kWpaPersonal;
}
else if (security & WFX_SEC_WPA2)
{
securityType = WiFiSecurity::kWpa2Personal;
}
else if (security == WFX_SEC_WPA3)
{
securityType = WiFiSecurity::kWpa3Personal;
}
else
{
// wfx_sec_t support more type
securityType = WiFiSecurity::kUnencrypted;
}
return securityType;
}
bool SlWiFiDriver::StartScanWiFiNetworks(ByteSpan ssid)
{
bool scanStarted = false;
ChipLogProgress(DeviceLayer, "Start Scan WiFi Networks");
if (!ssid.empty()) // ssid is given, only scan this network
{
char cSsid[DeviceLayer::Internal::kMaxWiFiSSIDLength] = {};
memcpy(cSsid, ssid.data(), ssid.size());
scanStarted = wfx_start_scan(cSsid, OnScanWiFiNetworkDone);
}
else // scan all networks
{
scanStarted = wfx_start_scan(nullptr, OnScanWiFiNetworkDone);
}
return scanStarted;
}
void SlWiFiDriver::OnScanWiFiNetworkDone(wfx_wifi_scan_result_t * aScanResult)
{
ChipLogProgress(DeviceLayer, "OnScanWiFiNetworkDone");
if (!aScanResult)
{
if (GetInstance().mpScanCallback != nullptr)
{
DeviceLayer::SystemLayer().ScheduleLambda([]() {
GetInstance().mpScanCallback->OnFinished(NetworkCommissioning::Status::kSuccess, CharSpan(), &mScanResponseIter);
GetInstance().mpScanCallback = nullptr;
});
}
}
else
{
NetworkCommissioning::WiFiScanResponse scanResponse = {};
scanResponse.security.Set(GetInstance().ConvertSecuritytype(aScanResult->security));
scanResponse.channel = aScanResult->chan;
scanResponse.rssi = aScanResult->rssi;
scanResponse.ssidLen = strnlen(aScanResult->ssid, DeviceLayer::Internal::kMaxWiFiSSIDLength);
memcpy(scanResponse.ssid, aScanResult->ssid, scanResponse.ssidLen);
memcpy(scanResponse.bssid, aScanResult->bssid, sizeof(scanResponse.bssid));
mScanResponseIter.Add(&scanResponse);
}
}
void SlWiFiDriver::ScanNetworks(ByteSpan ssid, WiFiDriver::ScanCallback * callback)
{
if (callback != nullptr)
{
mpScanCallback = callback;
if (!StartScanWiFiNetworks(ssid))
{
ChipLogError(DeviceLayer, "ScanWiFiNetworks failed to start");
mpScanCallback = nullptr;
callback->OnFinished(Status::kUnknownError, CharSpan(), nullptr);
}
}
}
CHIP_ERROR GetConnectedNetwork(Network & network)
{
wfx_wifi_provision_t wifiConfig;
if (!wfx_is_sta_connected() || !wfx_get_wifi_provision(&wifiConfig))
{
return CHIP_ERROR_INCORRECT_STATE;
}
uint8_t length = strnlen(wifiConfig.ssid, DeviceLayer::Internal::kMaxWiFiSSIDLength);
if (length > sizeof(network.networkID))
{
ChipLogError(DeviceLayer, "SSID too long");
return CHIP_ERROR_INTERNAL;
}
memcpy(network.networkID, wifiConfig.ssid, length);
network.networkIDLen = length;
return CHIP_NO_ERROR;
}
size_t SlWiFiDriver::WiFiNetworkIterator::Count()
{
return mDriver->mStagingNetwork.ssidLen == 0 ? 0 : 1;
}
bool SlWiFiDriver::WiFiNetworkIterator::Next(Network & item)
{
if (mExhausted || mDriver->mStagingNetwork.ssidLen == 0)
{
return false;
}
memcpy(item.networkID, mDriver->mStagingNetwork.ssid, mDriver->mStagingNetwork.ssidLen);
item.networkIDLen = mDriver->mStagingNetwork.ssidLen;
item.connected = false;
mExhausted = true;
Network connectedNetwork;
CHIP_ERROR err = GetConnectedNetwork(connectedNetwork);
if (err == CHIP_NO_ERROR)
{
if (connectedNetwork.networkIDLen == item.networkIDLen &&
memcmp(connectedNetwork.networkID, item.networkID, item.networkIDLen) == 0)
{
item.connected = true;
}
}
return true;
}
} // namespace NetworkCommissioning
} // namespace DeviceLayer
} // namespace chip