From 2338568a67b9555a0928c9aa18a5c52f4df1255d Mon Sep 17 00:00:00 2001
From: Sharad Binjola <31142146+sharadb-amazon@users.noreply.github.com>
Date: Thu, 11 Nov 2021 12:55:36 -0800
Subject: [PATCH] Add CHIPTool cmd to start UDC server and listen for UDC
 requests (#11655)

---
 examples/chip-tool/BUILD.gn                   |  1 +
 examples/chip-tool/args.gni                   |  7 ++
 .../chip-tool/commands/pairing/Commands.h     | 17 +++++
 .../chip-tool/include/CHIPProjectAppConfig.h  | 75 +++++++++++++++++++
 4 files changed, 100 insertions(+)
 create mode 100644 examples/chip-tool/include/CHIPProjectAppConfig.h

diff --git a/examples/chip-tool/BUILD.gn b/examples/chip-tool/BUILD.gn
index 67551c0617e951..fa8c67c090012c 100644
--- a/examples/chip-tool/BUILD.gn
+++ b/examples/chip-tool/BUILD.gn
@@ -52,6 +52,7 @@ executable("chip-tool") {
   defines = [ "CONFIG_USE_SEPARATE_EVENTLOOP=${config_use_separate_eventloop}" ]
 
   deps = [
+    "${chip_root}/src/app/server",
     "${chip_root}/src/controller/data_model",
     "${chip_root}/src/lib",
     "${chip_root}/src/platform",
diff --git a/examples/chip-tool/args.gni b/examples/chip-tool/args.gni
index 311ddab32d5fe5..a76f3e8996ce3c 100644
--- a/examples/chip-tool/args.gni
+++ b/examples/chip-tool/args.gni
@@ -15,3 +15,10 @@
 import("//build_overrides/chip.gni")
 
 import("${chip_root}/config/standalone/args.gni")
+
+chip_device_project_config_include = "<CHIPProjectAppConfig.h>"
+chip_project_config_include = "<CHIPProjectAppConfig.h>"
+chip_system_project_config_include = "<SystemProjectConfig.h>"
+
+chip_project_config_include_dirs = [ "${chip_root}/examples/chip-tool/include" ]
+chip_project_config_include_dirs += [ "${chip_root}/config/standalone" ]
diff --git a/examples/chip-tool/commands/pairing/Commands.h b/examples/chip-tool/commands/pairing/Commands.h
index 696171e06fa2d3..de72e392167703 100644
--- a/examples/chip-tool/commands/pairing/Commands.h
+++ b/examples/chip-tool/commands/pairing/Commands.h
@@ -22,6 +22,9 @@
 #include "ConfigureFabricCommand.h"
 #include "PairingCommand.h"
 
+#include <app/server/Dnssd.h>
+#include <lib/dnssd/Resolver.h>
+
 class Unpair : public PairingCommand
 {
 public:
@@ -149,6 +152,19 @@ class OpenCommissioningWindow : public PairingCommand
     {}
 };
 
+class StartUdcServerCommand : public CHIPCommand
+{
+public:
+    StartUdcServerCommand() : CHIPCommand("start-udc-server") {}
+    chip::System::Clock::Timeout GetWaitDuration() const override { return chip::System::Clock::Seconds16(300); }
+
+    CHIP_ERROR RunCommand() override
+    {
+        chip::app::DnssdServer::Instance().StartServer(chip::Dnssd::CommissioningMode::kDisabled);
+        return CHIP_NO_ERROR;
+    }
+};
+
 void registerCommandsPairing(Commands & commands)
 {
     const char * clusterName = "Pairing";
@@ -174,6 +190,7 @@ void registerCommandsPairing(Commands & commands)
         // TODO - enable CommissionedListCommand once DNS Cache is implemented
         //        make_unique<CommissionedListCommand>(),
         make_unique<ConfigureFabricCommand>(),
+        make_unique<StartUdcServerCommand>(),
     };
 
     commands.Register(clusterName, clusterCommands);
diff --git a/examples/chip-tool/include/CHIPProjectAppConfig.h b/examples/chip-tool/include/CHIPProjectAppConfig.h
new file mode 100644
index 00000000000000..0d5aee9f4135cf
--- /dev/null
+++ b/examples/chip-tool/include/CHIPProjectAppConfig.h
@@ -0,0 +1,75 @@
+/*
+ *
+ *    Copyright (c) 2020-2021 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.
+ */
+
+/**
+ *    @file
+ *      Project configuration for CHIP Tool.
+ *
+ */
+#ifndef CHIPPROJECTCONFIG_H
+#define CHIPPROJECTCONFIG_H
+
+#define CHIP_CONFIG_ENABLE_EPHEMERAL_UDP_PORT 1
+
+#define CHIP_CONFIG_EVENT_LOGGING_UTC_TIMESTAMPS 1
+
+#define CHIP_CONFIG_EVENT_LOGGING_NUM_EXTERNAL_CALLBACKS 2
+
+#define CHIP_CONFIG_EVENT_LOGGING_EXTERNAL_EVENT_SUPPORT 1
+
+// Uncomment this for a large Tunnel MTU.
+//#define CHIP_CONFIG_TUNNEL_INTERFACE_MTU                           (9000)
+
+// Enable support functions for parsing command-line arguments
+#define CHIP_CONFIG_ENABLE_ARG_PARSER 1
+
+// Use a default pairing code if one hasn't been provisioned in flash.
+#define CHIP_DEVICE_CONFIG_USE_TEST_SETUP_PIN_CODE 20202021
+#define CHIP_DEVICE_CONFIG_USE_TEST_SETUP_DISCRIMINATOR 0xF00
+
+// Enable reading DRBG seed data from /dev/(u)random.
+// This is needed for test applications and the CHIP device manager to function
+// properly when CHIP_CONFIG_RNG_IMPLEMENTATION_CHIPDRBG is enabled.
+#define CHIP_CONFIG_DEV_RANDOM_DRBG_SEED 1
+
+// For convenience, Chip Security Test Mode can be enabled and the
+// requirement for authentication in various protocols can be disabled.
+//
+//    WARNING: These options make it possible to circumvent basic Chip security functionality,
+//    including message encryption. Because of this they MUST NEVER BE ENABLED IN PRODUCTION BUILDS.
+//
+#define CHIP_CONFIG_SECURITY_TEST_MODE 0
+#define CHIP_CONFIG_REQUIRE_AUTH 1
+
+// Increase session idle timeout in stand-alone builds for the convenience of developers.
+#define CHIP_CONFIG_DEFAULT_SECURITY_SESSION_IDLE_TIMEOUT 120000
+
+#define CHIP_CONFIG_ENABLE_UPDATE 1
+
+#define CHIP_CONFIG_LEGACY_CASE_AUTH_DELEGATE 0
+
+#define CHIP_CONFIG_LEGACY_KEY_EXPORT_DELEGATE 0
+
+#define CHIP_SYSTEM_CONFIG_PACKETBUFFER_POOL_SIZE 0
+
+#define CHIP_CONFIG_DATA_MANAGEMENT_CLIENT_EXPERIMENTAL 1
+
+#define CHIP_DEVICE_CONFIG_ENABLE_TEST_DEVICE_IDENTITY 1
+
+#define CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY 1
+
+#endif /* CHIPPROJECTCONFIG_H */