[dataset] define Dataset::Tlvs type (#9991)

This commit defines `Dataset::Tlvs` as a core type corresponding to
public OT `otOperationalDatasetTlvs` structure.

src/core/meshcop/dataset.cpp

@@ -251,10 +251,10 @@ void Dataset::ConvertTo(Info &aDatasetInfo) const
     }
 }
 
-void Dataset::ConvertTo(otOperationalDatasetTlvs &aDataset) const
+void Dataset::ConvertTo(Tlvs &aTlvs) const
 {
-    memcpy(aDataset.mTlvs, mTlvs, mLength);
-    aDataset.mLength = static_cast<uint8_t>(mLength);
+    memcpy(aTlvs.mTlvs, mTlvs, mLength);
+    aTlvs.mLength = static_cast<uint8_t>(mLength);
 }
 
 void Dataset::Set(Type aType, const Dataset &aDataset)
@@ -271,10 +271,10 @@ void Dataset::Set(Type aType, const Dataset &aDataset)
     mUpdateTime = aDataset.GetUpdateTime();
 }
 
-void Dataset::SetFrom(const otOperationalDatasetTlvs &aDataset)
+void Dataset::SetFrom(const Tlvs &aTlvs)
 {
-    mLength = aDataset.mLength;
-    memcpy(mTlvs, aDataset.mTlvs, mLength);
+    mLength = aTlvs.mLength;
+    memcpy(mTlvs, aTlvs.mTlvs, mLength);
 }
 
 Error Dataset::SetFrom(const Info &aDatasetInfo)

src/core/meshcop/dataset.hpp

@@ -75,6 +75,12 @@ public:
         kPending, ///< Pending Dataset
     };
 
+    /**
+     * Represents a Dataset as a sequence of TLVs.
+     *
+     */
+    typedef otOperationalDatasetTlvs Tlvs;
+
     /**
      * Represents presence of different components in Active or Pending Operational Dataset.
      *
@@ -770,10 +776,10 @@ public:
     /**
      * Converts the TLV representation to structure representation.
      *
-     * @param[out] aDataset  A reference to `otOperationalDatasetTlvs` to output the Dataset.
+     * @param[out] aTlvs  A reference to output the Dataset as a sequence of TLVs.
      *
      */
-    void ConvertTo(otOperationalDatasetTlvs &aDataset) const;
+    void ConvertTo(Tlvs &aTlvs) const;
 
     /**
      * Returns the Dataset size in bytes.
@@ -859,10 +865,10 @@ public:
     /**
      * Sets the Dataset using @p aDataset.
      *
-     * @param[in]  aDataset  The input Dataset as otOperationalDatasetTlvs.
+     * @param[in]  aDataset  The input Dataset as `Tlvs`.
      *
      */
-    void SetFrom(const otOperationalDatasetTlvs &aDataset);
+    void SetFrom(const Tlvs &aTlvs);
 
     /**
      * Appends the MLE Dataset TLV but excluding MeshCoP Sub Timestamp TLV.

src/core/meshcop/dataset_local.cpp

@@ -147,15 +147,15 @@ exit:
     return error;
 }
 
-Error DatasetLocal::Read(otOperationalDatasetTlvs &aDataset) const
+Error DatasetLocal::Read(Dataset::Tlvs &aDatasetTlvs) const
 {
     Dataset dataset;
     Error   error;
 
-    ClearAllBytes(aDataset);
+    ClearAllBytes(aDatasetTlvs);
 
     SuccessOrExit(error = Read(dataset));
-    dataset.ConvertTo(aDataset);
+    dataset.ConvertTo(aDatasetTlvs);
 
 exit:
     return error;
@@ -173,11 +173,11 @@ exit:
     return error;
 }
 
-Error DatasetLocal::Save(const otOperationalDatasetTlvs &aDataset)
+Error DatasetLocal::Save(const Dataset::Tlvs &aDatasetTlvs)
 {
     Dataset dataset;
 
-    dataset.SetFrom(aDataset);
+    dataset.SetFrom(aDatasetTlvs);
 
     return Save(dataset);
 }

src/core/meshcop/dataset_local.hpp

@@ -134,13 +134,13 @@ public:
     /**
      * Retrieves the dataset from non-volatile memory.
      *
-     * @param[out]  aDataset  Where to place the dataset.
+     * @param[out]  aDatasetTlvs  Where to place the dataset.
      *
      * @retval kErrorNone      Successfully retrieved the dataset.
      * @retval kErrorNotFound  There is no corresponding dataset stored in non-volatile memory.
      *
      */
-    Error Read(otOperationalDatasetTlvs &aDataset) const;
+    Error Read(Dataset::Tlvs &aDatasetTlvs) const;
 
     /**
      * Returns the local time this dataset was last updated or restored.
@@ -164,13 +164,13 @@ public:
     /**
      * Stores the dataset into non-volatile memory.
      *
-     * @param[in]  aDataset  The Dataset to save as `otOperationalDatasetTlvs`.
+     * @param[in]  aDatasetTlvs  The Dataset to save as `Dataset::Tlvs`.
      *
      * @retval kErrorNone             Successfully saved the dataset.
      * @retval kErrorNotImplemented   The platform does not implement settings functionality.
      *
      */
-    Error Save(const otOperationalDatasetTlvs &aDataset);
+    Error Save(const Dataset::Tlvs &aDatasetTlvs);
 
     /**
      * Stores the dataset into non-volatile memory.

src/core/meshcop/dataset_manager.cpp

@@ -160,11 +160,11 @@ exit:
     return error;
 }
 
-Error DatasetManager::Save(const otOperationalDatasetTlvs &aDataset)
+Error DatasetManager::Save(const Dataset::Tlvs &aDatasetTlvs)
 {
     Error error;
 
-    SuccessOrExit(error = mLocal.Save(aDataset));
+    SuccessOrExit(error = mLocal.Save(aDatasetTlvs));
     HandleDatasetUpdated();
 
 exit:
@@ -697,11 +697,11 @@ exit:
     return error;
 }
 
-Error PendingDatasetManager::Save(const otOperationalDatasetTlvs &aDataset)
+Error PendingDatasetManager::Save(const Dataset::Tlvs &aDatasetTlvs)
 {
     Error error;
 
-    SuccessOrExit(error = DatasetManager::Save(aDataset));
+    SuccessOrExit(error = DatasetManager::Save(aDatasetTlvs));
     StartDelayTimer();
 
 exit:

src/core/meshcop/dataset_manager.hpp

@@ -96,13 +96,13 @@ public:
     /**
      * Retrieves the dataset from non-volatile memory.
      *
-     * @param[out]  aDataset  Where to place the dataset.
+     * @param[out]  aDatasetTlvs  Where to place the dataset.
      *
      * @retval kErrorNone      Successfully retrieved the dataset.
      * @retval kErrorNotFound  There is no corresponding dataset stored in non-volatile memory.
      *
      */
-    Error Read(otOperationalDatasetTlvs &aDataset) const { return mLocal.Read(aDataset); }
+    Error Read(Dataset::Tlvs &aDatasetTlvs) const { return mLocal.Read(aDatasetTlvs); }
 
     /**
      * Retrieves the channel mask from local dataset.
@@ -261,13 +261,13 @@ protected:
     /**
      * Saves the Operational Dataset in non-volatile memory.
      *
-     * @param[in]  aDataset  The Operational Dataset.
+     * @param[in]  aDatasetTlvs  The Operational Dataset as `Dataset::Tlvs`.
      *
      * @retval kErrorNone             Successfully saved the dataset.
      * @retval kErrorNotImplemented   The platform does not implement settings functionality.
      *
      */
-    Error Save(const otOperationalDatasetTlvs &aDataset);
+    Error Save(const Dataset::Tlvs &aDatasetTlvs);
 
     /**
      * Sets the Operational Dataset for the partition.
@@ -459,13 +459,13 @@ public:
     /**
      * Sets the Operational Dataset in non-volatile memory.
      *
-     * @param[in]  aDataset  The Operational Dataset.
+     * @param[in]  aDatasetTlvs  The Operational Dataset as `Dataset::Tlvs`.
      *
      * @retval kErrorNone            Successfully saved the dataset.
      * @retval kErrorNotImplemented  The platform does not implement settings functionality.
      *
      */
-    Error Save(const otOperationalDatasetTlvs &aDataset) { return DatasetManager::Save(aDataset); }
+    Error Save(const Dataset::Tlvs &aDatasetTlvs) { return DatasetManager::Save(aDatasetTlvs); }
 
 #if OPENTHREAD_FTD
 
@@ -558,13 +558,13 @@ public:
      *
      * Also starts the Delay Timer.
      *
-     * @param[in]  aDataset  The Operational Dataset.
+     * @param[in]  aDatasetTlvs  The Operational Dataset as a sequence of TLVs.
      *
      * @retval kErrorNone            Successfully saved the dataset.
      * @retval kErrorNotImplemented  The platform does not implement settings functionality.
      *
      */
-    Error Save(const otOperationalDatasetTlvs &aDataset);
+    Error Save(const Dataset::Tlvs &aDatasetTlvs);
 
     /**
      * Sets the Operational Dataset for the partition.

src/core/meshcop/tcat_agent.cpp

@@ -461,9 +461,9 @@ exit:
 
 Error TcatAgent::HandleSetActiveOperationalDataset(const Message &aIncommingMessage, uint16_t aOffset, uint16_t aLength)
 {
-    Dataset                  dataset;
-    otOperationalDatasetTlvs datasetTlvs;
-    Error                    error;
+    Dataset       dataset;
+    Dataset::Tlvs datasetTlvs;
+    Error         error;
 
     SuccessOrExit(error = dataset.ReadFromMessage(aIncommingMessage, aOffset, aLength));