diff --git a/wifi/1.3/default/ringbuffer.cpp b/wifi/1.3/default/ringbuffer.cpp
new file mode 100644
index 0000000..1294c52
--- /dev/null
+++ b/wifi/1.3/default/ringbuffer.cpp
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#include <android-base/logging.h>
+
+#include "ringbuffer.h"
+
+namespace android {
+namespace hardware {
+namespace wifi {
+namespace V1_3 {
+namespace implementation {
+
+Ringbuffer::Ringbuffer(size_t maxSize) : size_(0), maxSize_(maxSize) {}
+
+void Ringbuffer::append(const std::vector<uint8_t>& input) {
+    if (input.size() == 0) {
+        return;
+    }
+    if (input.size() > maxSize_) {
+        LOG(INFO) << "Oversized message of " << input.size()
+                  << " bytes is dropped";
+        return;
+    }
+    data_.push_back(input);
+    size_ += input.size() * sizeof(input[0]);
+    while (size_ > maxSize_) {
+        size_ -= data_.front().size() * sizeof(data_.front()[0]);
+        data_.pop_front();
+    }
+}
+
+const std::list<std::vector<uint8_t>>& Ringbuffer::getData() const {
+    return data_;
+}
+
+}  // namespace implementation
+}  // namespace V1_3
+}  // namespace wifi
+}  // namespace hardware
+}  // namespace android