Use manual instantiation for Wi-Fi Network Management server

Following the same pattern as Thread Network Directory server.

examples/network-manager-app/linux/main.cpp

@@ -28,9 +28,6 @@ using namespace chip;
 using namespace chip::app;
 using namespace chip::app::Clusters;
 
-void ApplicationInit() {}
-void ApplicationShutdown() {}
-
 ByteSpan ByteSpanFromCharSpan(CharSpan span)
 {
     return ByteSpan(Uint8::from_const_char(span.data()), span.size());
@@ -43,16 +40,24 @@ void emberAfThreadNetworkDirectoryClusterInitCallback(chip::EndpointId endpoint)
     gThreadNetworkDirectoryServer.emplace(endpoint).Init();
 }
 
-int main(int argc, char * argv[])
+std::optional<WiFiNetworkManagementServer> gWiFiNetworkManagementServer;
+void emberAfWiFiNetworkManagementClusterInitCallback(chip::EndpointId endpoint)
+{
+    VerifyOrDie(!gWiFiNetworkManagementServer);
+    gWiFiNetworkManagementServer.emplace(endpoint).Init();
+}
+
+void ApplicationInit()
 {
-    if (ChipLinuxAppInit(argc, argv) != 0)
-    {
-        return -1;
-    }
+    gWiFiNetworkManagementServer->SetNetworkCredentials(ByteSpanFromCharSpan("MatterAP"_span),
+                                                        ByteSpanFromCharSpan("Setec Astronomy"_span));
+}
 
-    WiFiNetworkManagementServer::Instance().SetNetworkCredentials(ByteSpanFromCharSpan("MatterAP"_span),
-                                                                  ByteSpanFromCharSpan("Setec Astronomy"_span));
+void ApplicationShutdown() {}
 
+int main(int argc, char * argv[])
+{
+    VerifyOrReturnValue(ChipLinuxAppInit(argc, argv) == 0, -1);
     ChipLinuxAppMainLoop();
     return 0;
 }

src/app/clusters/wifi-network-management-server/wifi-network-management-server.cpp

@@ -20,8 +20,6 @@
 #include <app/AttributeAccessInterfaceRegistry.h>
 #include <app/InteractionModelEngine.h>
 #include <app/reporting/reporting.h>
-#include <app/util/config.h>
-#include <lib/core/Global.h>
 #include <lib/support/CodeUtils.h>
 
 #include <algorithm>
@@ -55,18 +53,11 @@ bool IsValidWpaPersonalCredential(ByteSpan credential)
     return false;
 }
 
-Global<WiFiNetworkManagementServer> gWiFiNetworkManagementServerInstance;
-
 } // namespace
 
-WiFiNetworkManagementServer & WiFiNetworkManagementServer::Instance()
-{
-    return gWiFiNetworkManagementServerInstance.get();
-}
-
-WiFiNetworkManagementServer::WiFiNetworkManagementServer() :
-    AttributeAccessInterface(NullOptional, WiFiNetworkManagement::Id),
-    CommandHandlerInterface(NullOptional, WiFiNetworkManagement::Id)
+WiFiNetworkManagementServer::WiFiNetworkManagementServer(EndpointId endpoint) :
+    AttributeAccessInterface(MakeOptional(endpoint), WiFiNetworkManagement::Id),
+    CommandHandlerInterface(MakeOptional(endpoint), WiFiNetworkManagement::Id)
 {}
 
 WiFiNetworkManagementServer::~WiFiNetworkManagementServer()
@@ -75,12 +66,8 @@ WiFiNetworkManagementServer::~WiFiNetworkManagementServer()
     InteractionModelEngine::GetInstance()->UnregisterCommandHandler(this);
 }
 
-CHIP_ERROR WiFiNetworkManagementServer::Init(EndpointId endpoint)
+CHIP_ERROR WiFiNetworkManagementServer::Init()
 {
-    VerifyOrReturnError(endpoint != kInvalidEndpointId, CHIP_ERROR_INVALID_ARGUMENT);
-    VerifyOrReturnError(mEndpointId == kInvalidEndpointId, CHIP_ERROR_INCORRECT_STATE);
-
-    mEndpointId = endpoint;
     VerifyOrReturnError(registerAttributeAccessOverride(this), CHIP_ERROR_INTERNAL);
     ReturnErrorOnFailure(InteractionModelEngine::GetInstance()->RegisterCommandHandler(this));
     return CHIP_NO_ERROR;
@@ -92,7 +79,7 @@ CHIP_ERROR WiFiNetworkManagementServer::ClearNetworkCredentials()
 
     mSsidLen = 0;
     mPassphrase.SetLength(0);
-    MatterReportingAttributeChangeCallback(mEndpointId, WiFiNetworkManagement::Id, Ssid::Id);
+    MatterReportingAttributeChangeCallback(GetEndpointId(), WiFiNetworkManagement::Id, Ssid::Id);
     return CHIP_NO_ERROR;
 }
 
@@ -114,7 +101,7 @@ CHIP_ERROR WiFiNetworkManagementServer::SetNetworkCredentials(ByteSpan ssid, Byt
     // Note: The spec currently defines no way to signal a passphrase change
     if (ssidChanged)
     {
-        MatterReportingAttributeChangeCallback(mEndpointId, WiFiNetworkManagement::Id, Ssid::Id);
+        MatterReportingAttributeChangeCallback(GetEndpointId(), WiFiNetworkManagement::Id, Ssid::Id);
     }
     return CHIP_NO_ERROR;
 }
@@ -160,17 +147,4 @@ void WiFiNetworkManagementServer::HandleNetworkPassphraseRequest(HandlerContext
 } // namespace app
 } // namespace chip
 
-#if defined(MATTER_DM_WIFI_NETWORK_MANAGEMENT_CLUSTER_SERVER_ENDPOINT_COUNT) &&                                                    \
-    MATTER_DM_WIFI_NETWORK_MANAGEMENT_CLUSTER_SERVER_ENDPOINT_COUNT > 1
-#error Only a single Wi-Fi Network Management Cluster instance is supported.
-#endif
-
 void MatterWiFiNetworkManagementPluginServerInitCallback() {}
-
-void emberAfWiFiNetworkManagementClusterServerInitCallback(EndpointId endpoint)
-{
-    // We could delay constructing the instance until this point; however it's not
-    // clear if this is inconvenient in terms of forcing the application to initialize
-    // the network credentials later than it otherwise would.
-    LogErrorOnFailure(chip::app::Clusters::WiFiNetworkManagementServer::Instance().Init(endpoint));
-}

src/app/clusters/wifi-network-management-server/wifi-network-management-server.h

@@ -20,9 +20,7 @@
 #include <app-common/zap-generated/cluster-objects.h>
 #include <app/AttributeAccessInterface.h>
 #include <app/CommandHandlerInterface.h>
-#include <crypto/CHIPCryptoPAL.h>
 #include <lib/core/CHIPError.h>
-#include <lib/core/Global.h>
 #include <lib/support/Span.h>
 
 void emberAfWiFiNetworkManagementClusterServerInitCallback(chip::EndpointId);
@@ -34,30 +32,26 @@ namespace Clusters {
 class WiFiNetworkManagementServer : private AttributeAccessInterface, private CommandHandlerInterface
 {
 public:
-    static WiFiNetworkManagementServer & Instance();
+    WiFiNetworkManagementServer(EndpointId endpoint);
+    ~WiFiNetworkManagementServer();
+
+    CHIP_ERROR Init();
 
     CHIP_ERROR ClearNetworkCredentials();
     CHIP_ERROR SetNetworkCredentials(ByteSpan ssid, ByteSpan passphrase);
 
-private:
-    friend Global<WiFiNetworkManagementServer>;
-    friend void ::emberAfWiFiNetworkManagementClusterServerInitCallback(chip::EndpointId);
-
-    WiFiNetworkManagementServer();
-    ~WiFiNetworkManagementServer();
-    CHIP_ERROR Init(EndpointId endpoint);
-
     WiFiNetworkManagementServer(WiFiNetworkManagementServer const &)             = delete;
     WiFiNetworkManagementServer & operator=(WiFiNetworkManagementServer const &) = delete;
 
+private:
+    EndpointId GetEndpointId() { return AttributeAccessInterface::GetEndpointId().Value(); }
+
     CHIP_ERROR Read(const ConcreteReadAttributePath & aPath, AttributeValueEncoder & aEncoder) override;
     void InvokeCommand(HandlerContext & handlerContext) override;
 
     void HandleNetworkPassphraseRequest(HandlerContext & ctx,
                                         const WiFiNetworkManagement::Commands::NetworkPassphraseRequest::DecodableType & req);
 
-    EndpointId mEndpointId = kInvalidEndpointId;
-
     uint8_t mSsid[32];
     uint8_t mSsidLen = 0;
     static_assert(std::numeric_limits<decltype(mSsidLen)>::max() >= sizeof(mSsid));

src/app/common/templates/config-data.yaml

@@ -59,7 +59,6 @@ ClustersWithInitFunctions:
     - Mode Select
     - Sample MEI
     - Scenes Management
-    - Wi-Fi Network Management
 
 ClustersWithAttributeChangedFunctions:
     - Bridged Device Basic