[app] Add option to disable Read Client (project-chip#28050)

* Add option to disable Read Client

* Restyled by gn

---------

Co-authored-by: Restyled.io <commits@restyled.io>

Author: 2 people

config/esp32/components/chip/CMakeLists.txt

@@ -124,6 +124,10 @@ if(CONFIG_DISABLE_IPV4)
     chip_gn_arg_append("chip_inet_config_enable_ipv4"        "false")
 endif()
 
+if(CONFIG_DISABLE_READ_CLIENT)
+    chip_gn_arg_append("chip_enable_read_client"             "false")
+endif()
+
 if(CHIP_CODEGEN_PREGEN_DIR)
     chip_gn_arg_append("chip_code_pre_generated_directory"  "\"${CHIP_CODEGEN_PREGEN_DIR}\"")
 endif()

config/esp32/components/chip/Kconfig

@@ -108,6 +108,12 @@ menu "CHIP Core"
             help
                 Matter spec is based on IPv6 communication only. Enabling this option may save some flash/ram.
 
+        config DISABLE_READ_CLIENT
+            bool "Disable read client in Interaction Model"
+            default n
+            help
+                Some device types don't require the read client. Enabling this option may save some flash/ram.
+
         config BUILD_CHIP_TESTS
             bool "Build CHIP tests"
             default n

examples/lighting-app/esp32/sdkconfig.defaults

@@ -58,3 +58,6 @@ CONFIG_RMT_SUPPRESS_DEPRECATE_WARN=y
 
 # Enable HKDF in mbedtls
 CONFIG_MBEDTLS_HKDF_C=y
+
+# Disable Read Client
+CONFIG_DISABLE_READ_CLIENT=y

src/app/BUILD.gn

@@ -43,6 +43,7 @@ declare_args() {
   chip_im_force_fabric_quota_check = false
 
   enable_eventlist_attribute = true
+  chip_enable_read_client = true
 }
 
 buildconfig_header("app_buildconfig") {
@@ -57,6 +58,7 @@ buildconfig_header("app_buildconfig") {
     "CHIP_CONFIG_PERSIST_SUBSCRIPTIONS=${chip_persist_subscriptions}",
     "CHIP_CONFIG_ENABLE_EVENTLIST_ATTRIBUTE=${enable_eventlist_attribute}",
     "CHIP_CONFIG_ENABLE_ICD_SERVER=${chip_enable_icd_server}",
+    "CHIP_CONFIG_ENABLE_READ_CLIENT=${chip_enable_read_client}",
   ]
 }
 
@@ -178,7 +180,6 @@ static_library("app") {
     "OperationalSessionSetup.cpp",
     "OperationalSessionSetup.h",
     "OperationalSessionSetupPool.h",
-    "ReadClient.cpp",
     "ReadHandler.cpp",
     "RequiredPrivilege.cpp",
     "RequiredPrivilege.h",
@@ -206,6 +207,10 @@ static_library("app") {
     ]
   }
 
+  if (chip_enable_read_client) {
+    sources += [ "ReadClient.cpp" ]
+  }
+
   public_deps = [
     ":app_config",
     "${chip_root}/src/access",

src/app/InteractionModelEngine.cpp

@@ -878,10 +878,12 @@ CHIP_ERROR InteractionModelEngine::OnMessageReceived(Messaging::ExchangeContext
         status =
             OnReadInitialRequest(apExchangeContext, aPayloadHeader, std::move(aPayload), ReadHandler::InteractionType::Subscribe);
     }
+#if CHIP_CONFIG_ENABLE_READ_CLIENT
     else if (aPayloadHeader.HasMessageType(Protocols::InteractionModel::MsgType::ReportData))
     {
         status = OnUnsolicitedReportData(apExchangeContext, aPayloadHeader, std::move(aPayload));
     }
+#endif // CHIP_CONFIG_ENABLE_READ_CLIENT
     else if (aPayloadHeader.HasMessageType(MsgType::TimedRequest))
     {
         OnTimedRequest(apExchangeContext, aPayloadHeader, std::move(aPayload), status);
@@ -1723,7 +1725,7 @@ void InteractionModelEngine::OnFabricRemoved(const FabricTable & fabricTable, Fa
 
         return Loop::Continue;
     });
-
+#if CHIP_CONFIG_ENABLE_READ_CLIENT
     for (auto * readClient = mpActiveReadClientList; readClient != nullptr; readClient = readClient->GetNextClient())
     {
         if (readClient->GetFabricIndex() == fabricIndex)
@@ -1732,6 +1734,7 @@ void InteractionModelEngine::OnFabricRemoved(const FabricTable & fabricTable, Fa
             readClient->Close(CHIP_ERROR_IM_FABRIC_DELETED, false);
         }
     }
+#endif // CHIP_CONFIG_ENABLE_READ_CLIENT
 
     for (auto & handler : mWriteHandlers)
     {