From 003593e75109aecbbfc5dc2d14ef260f98def8e8 Mon Sep 17 00:00:00 2001
From: Rob Oliver <rgoliver@google.com>
Date: Wed, 17 Aug 2022 16:33:19 -0400
Subject: [PATCH] RPC: Add RPC to set ota metadata for provider

Add an RPC to set the TLV data in metadata for provider,
which is used during the SendQueryImageRequest.
---
 .../pigweed/protos/device_service.options     |  1 +
 .../pigweed/protos/device_service.proto       |  5 +++
 examples/common/pigweed/rpc_services/Device.h | 33 +++++++++++++++++--
 3 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/examples/common/pigweed/protos/device_service.options b/examples/common/pigweed/protos/device_service.options
index b5f9da673ff778..a0798688c38a84 100644
--- a/examples/common/pigweed/protos/device_service.options
+++ b/examples/common/pigweed/protos/device_service.options
@@ -5,3 +5,4 @@ chip.rpc.PairingInfo.qr_code max_size:256
 chip.rpc.PairingInfo.qr_code_url max_size:256
 chip.rpc.SpakeInfo.verifier max_size:97  // kSpake2p_VerifierSerialized_Length
 chip.rpc.SpakeInfo.salt max_size:32      // kSpake2p_Max_PBKDF_Salt_Length
+chip.rpc.MetadataForProvider.tlv max_size:512 // length defined in chip spec 11.20.6.7
diff --git a/examples/common/pigweed/protos/device_service.proto b/examples/common/pigweed/protos/device_service.proto
index 1c13d7d7281f14..6903e4a9055414 100644
--- a/examples/common/pigweed/protos/device_service.proto
+++ b/examples/common/pigweed/protos/device_service.proto
@@ -41,10 +41,15 @@ message PairingState {
   bool pairing_enabled = 1;
 }
 
+message MetadataForProvider {
+  bytes tlv = 1;
+}
+
 service Device {
   rpc FactoryReset(pw.protobuf.Empty) returns (pw.protobuf.Empty){}
   rpc Reboot(pw.protobuf.Empty) returns (pw.protobuf.Empty){}
   rpc TriggerOta(pw.protobuf.Empty) returns (pw.protobuf.Empty){}
+  rpc SetOtaMetadataForProvider(MetadataForProvider) returns (pw.protobuf.Empty){}
   rpc GetDeviceInfo(pw.protobuf.Empty) returns (DeviceInfo){}
   rpc GetDeviceState(pw.protobuf.Empty) returns (DeviceState){}
   rpc SetPairingState(PairingState) returns (pw.protobuf.Empty){}
diff --git a/examples/common/pigweed/rpc_services/Device.h b/examples/common/pigweed/rpc_services/Device.h
index d3d5afd165810d..4a80cb44516236 100644
--- a/examples/common/pigweed/rpc_services/Device.h
+++ b/examples/common/pigweed/rpc_services/Device.h
@@ -223,7 +223,7 @@ class Device : public pw_rpc::nanopb::Device::Service<Device>
 
     virtual pw::Status TriggerOta(const pw_protobuf_Empty & request, pw_protobuf_Empty & response)
     {
-#if CONFIG_CHIP_OTA_REQUESTOR
+#if CHIP_DEVICE_CONFIG_ENABLE_OTA_REQUESTOR
         chip::DeviceLayer::PlatformMgr().ScheduleWork(
             [](intptr_t) {
                 chip::OTARequestorInterface * requestor = chip::GetRequestorInstance();
@@ -238,10 +238,33 @@ class Device : public pw_rpc::nanopb::Device::Service<Device>
             },
             reinterpret_cast<intptr_t>(nullptr));
         return pw::OkStatus();
-#else
+#else  // CHIP_DEVICE_CONFIG_ENABLE_OTA_REQUESTOR
         ChipLogError(AppServer, "Trigger OTA requested, but OTA requestor not compiled in.");
         return pw::Status::Unimplemented();
-#endif
+#endif // CHIP_DEVICE_CONFIG_ENABLE_OTA_REQUESTOR
+    }
+
+    virtual pw::Status SetOtaMetadataForProvider(const chip_rpc_MetadataForProvider & request, pw_protobuf_Empty & response)
+    {
+#if CHIP_DEVICE_CONFIG_ENABLE_OTA_REQUESTOR
+        chip::OTARequestorInterface * requestor = chip::GetRequestorInstance();
+        if (requestor == nullptr)
+        {
+            ChipLogError(SoftwareUpdate, "Can't get the CASESessionManager");
+            return pw::Status::Unavailable();
+        }
+        else if (sizeof(metadataForProviderBuffer) < request.tlv.size)
+        {
+            return pw::Status::ResourceExhausted();
+        }
+        memcpy(metadataForProviderBuffer, request.tlv.bytes, request.tlv.size);
+        DeviceLayer::StackLock lock;
+        requestor->SetMetadataForProvider(chip::ByteSpan(metadataForProviderBuffer, request.tlv.size));
+        return pw::OkStatus();
+#else  // CHIP_DEVICE_CONFIG_ENABLE_OTA_REQUESTOR
+        ChipLogError(AppServer, "OTA set metadata for provider requested, but OTA requestor not compiled in.");
+        return pw::Status::Unimplemented();
+#endif // CHIP_DEVICE_CONFIG_ENABLE_OTA_REQUESTOR
     }
 
     virtual pw::Status SetPairingState(const chip_rpc_PairingState & request, pw_protobuf_Empty & response)
@@ -415,6 +438,10 @@ class Device : public pw_rpc::nanopb::Device::Service<Device>
     }
 
 private:
+#if CHIP_DEVICE_CONFIG_ENABLE_OTA_REQUESTOR
+    static constexpr size_t kMaxMetadataForProviderLength = 512; // length defined in chip spec 11.20.6.7
+    uint8_t metadataForProviderBuffer[kMaxMetadataForProviderLength];
+#endif // CHIP_DEVICE_CONFIG_ENABLE_OTA_REQUESTOR
     Internal::CommissionableDataProviderRpcWrapper mCommissionableDataProvider;
 };