diff --git a/netd/BpfHandler.h b/netd/BpfHandler.h
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+++ b/netd/BpfHandler.h
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+/**
+ * Copyright (c) 2022, 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.
+ */
+
+#pragma once
+
+#include <mutex>
+
+#include <netdutils/Status.h>
+#include "bpf/BpfMap.h"
+#include "bpf_shared.h"
+
+using android::bpf::BpfMap;
+
+namespace android {
+namespace net {
+
+class BpfHandler {
+  public:
+    BpfHandler();
+    BpfHandler(const BpfHandler&) = delete;
+    BpfHandler& operator=(const BpfHandler&) = delete;
+    netdutils::Status init(const char* cg2_path);
+    /*
+     * Tag the socket with the specified tag and uid. In the qtaguid module, the
+     * first tag request that grab the spinlock of rb_tree can update the tag
+     * information first and other request need to wait until it finish. All the
+     * tag request will be addressed in the order of they obtaining the spinlock.
+     * In the eBPF implementation, the kernel will try to update the eBPF map
+     * entry with the tag request. And the hashmap update process is protected by
+     * the spinlock initialized with the map. So the behavior of two modules
+     * should be the same. No additional lock needed.
+     */
+    int tagSocket(int sockFd, uint32_t tag, uid_t chargeUid, uid_t realUid);
+
+    /*
+     * The untag process is similar to tag socket and both old qtaguid module and
+     * new eBPF module have spinlock inside the kernel for concurrent update. No
+     * external lock is required.
+     */
+    int untagSocket(int sockFd);
+
+  private:
+    // For testing
+    BpfHandler(uint32_t perUidLimit, uint32_t totalLimit);
+
+    netdutils::Status initMaps();
+    bool hasUpdateDeviceStatsPermission(uid_t uid);
+
+    BpfMap<uint64_t, UidTagValue> mCookieTagMap;
+    BpfMap<StatsKey, StatsValue> mStatsMapA;
+    BpfMap<StatsKey, StatsValue> mStatsMapB;
+    BpfMap<uint32_t, uint8_t> mConfigurationMap;
+    BpfMap<uint32_t, uint8_t> mUidPermissionMap;
+
+    std::mutex mMutex;
+
+    // The limit on the number of stats entries a uid can have in the per uid stats map. BpfHandler
+    // will block that specific uid from tagging new sockets after the limit is reached.
+    const uint32_t mPerUidStatsEntriesLimit;
+
+    // The limit on the total number of stats entries in the per uid stats map. BpfHandler will
+    // block all tagging requests after the limit is reached.
+    const uint32_t mTotalUidStatsEntriesLimit;
+
+    // For testing
+    friend class BpfHandlerTest;
+};
+
+}  // namespace net
+}  // namespace android
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