diff --git a/framework/Android.bp b/framework/Android.bp
index 182c558..449e652 100644
--- a/framework/Android.bp
+++ b/framework/Android.bp
@@ -101,7 +101,7 @@
         "framework-connectivity-javastream-protos",
     ],
     impl_only_static_libs: [
-        "net-utils-device-common-struct",
+        "net-utils-device-common-bpf",
     ],
     libs: [
         "androidx.annotation_annotation",
@@ -130,7 +130,7 @@
         // to generate the SDK stubs.
         // Even if the library is included in "impl_only_static_libs" of defaults. This is still
         // needed because java_library which doesn't understand "impl_only_static_libs".
-        "net-utils-device-common-struct",
+        "net-utils-device-common-bpf",
     ],
     libs: [
         // This cannot be in the defaults clause above because if it were, it would be used
diff --git a/framework/src/android/net/BpfNetMapsReader.java b/framework/src/android/net/BpfNetMapsReader.java
new file mode 100644
index 0000000..49e874a
--- /dev/null
+++ b/framework/src/android/net/BpfNetMapsReader.java
@@ -0,0 +1,179 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+package android.net;
+
+import static android.net.BpfNetMapsConstants.CONFIGURATION_MAP_PATH;
+import static android.net.BpfNetMapsConstants.UID_OWNER_MAP_PATH;
+import static android.net.BpfNetMapsConstants.UID_RULES_CONFIGURATION_KEY;
+import static android.net.BpfNetMapsUtils.getMatchByFirewallChain;
+import static android.net.BpfNetMapsUtils.isFirewallAllowList;
+import static android.net.BpfNetMapsUtils.throwIfPreT;
+import static android.net.ConnectivityManager.FIREWALL_RULE_ALLOW;
+import static android.net.ConnectivityManager.FIREWALL_RULE_DENY;
+
+import android.annotation.NonNull;
+import android.annotation.RequiresApi;
+import android.os.Build;
+import android.os.ServiceSpecificException;
+import android.system.ErrnoException;
+import android.system.Os;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.modules.utils.build.SdkLevel;
+import com.android.net.module.util.BpfMap;
+import com.android.net.module.util.IBpfMap;
+import com.android.net.module.util.Struct;
+import com.android.net.module.util.Struct.S32;
+import com.android.net.module.util.Struct.U32;
+
+/**
+ * A helper class to *read* java BpfMaps.
+ * @hide
+ */
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)  // BPF maps were only mainlined in T
+public class BpfNetMapsReader {
+    // Locally store the handle of bpf maps. The FileDescriptors are statically cached inside the
+    // BpfMap implementation.
+
+    // Bpf map to store various networking configurations, the format of the value is different
+    // for different keys. See BpfNetMapsConstants#*_CONFIGURATION_KEY for keys.
+    private final IBpfMap<S32, U32> mConfigurationMap;
+    // Bpf map to store per uid traffic control configurations.
+    // See {@link UidOwnerValue} for more detail.
+    private final IBpfMap<S32, UidOwnerValue> mUidOwnerMap;
+    private final Dependencies mDeps;
+
+    public BpfNetMapsReader() {
+        this(new Dependencies());
+    }
+
+    @VisibleForTesting
+    public BpfNetMapsReader(@NonNull Dependencies deps) {
+        if (!SdkLevel.isAtLeastT()) {
+            throw new UnsupportedOperationException(
+                    BpfNetMapsReader.class.getSimpleName() + " is not supported below Android T");
+        }
+        mDeps = deps;
+        mConfigurationMap = mDeps.getConfigurationMap();
+        mUidOwnerMap = mDeps.getUidOwnerMap();
+    }
+
+    /**
+     * Dependencies of BpfNetMapReader, for injection in tests.
+     */
+    @VisibleForTesting
+    public static class Dependencies {
+        /** Get the configuration map. */
+        public IBpfMap<S32, U32> getConfigurationMap() {
+            try {
+                return new BpfMap<>(CONFIGURATION_MAP_PATH, BpfMap.BPF_F_RDONLY,
+                        S32.class, U32.class);
+            } catch (ErrnoException e) {
+                throw new IllegalStateException("Cannot open configuration map", e);
+            }
+        }
+
+        /** Get the uid owner map. */
+        public IBpfMap<S32, UidOwnerValue> getUidOwnerMap() {
+            try {
+                return new BpfMap<>(UID_OWNER_MAP_PATH, BpfMap.BPF_F_RDONLY,
+                        S32.class, UidOwnerValue.class);
+            } catch (ErrnoException e) {
+                throw new IllegalStateException("Cannot open uid owner map", e);
+            }
+        }
+    }
+
+    /**
+     * Get the specified firewall chain's status.
+     *
+     * @param chain target chain
+     * @return {@code true} if chain is enabled, {@code false} if chain is not enabled.
+     * @throws UnsupportedOperationException if called on pre-T devices.
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public boolean isChainEnabled(final int chain) {
+        return isChainEnabled(mConfigurationMap, chain);
+    }
+
+    /**
+     * Get firewall rule of specified firewall chain on specified uid.
+     *
+     * @param chain target chain
+     * @param uid        target uid
+     * @return either {@link ConnectivityManager#FIREWALL_RULE_ALLOW} or
+     *         {@link ConnectivityManager#FIREWALL_RULE_DENY}.
+     * @throws UnsupportedOperationException if called on pre-T devices.
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public int getUidRule(final int chain, final int uid) {
+        return getUidRule(mUidOwnerMap, chain, uid);
+    }
+
+    /**
+     * Get the specified firewall chain's status.
+     *
+     * @param configurationMap target configurationMap
+     * @param chain target chain
+     * @return {@code true} if chain is enabled, {@code false} if chain is not enabled.
+     * @throws UnsupportedOperationException if called on pre-T devices.
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public static boolean isChainEnabled(
+            final IBpfMap<Struct.S32, Struct.U32> configurationMap, final int chain) {
+        throwIfPreT("isChainEnabled is not available on pre-T devices");
+
+        final long match = getMatchByFirewallChain(chain);
+        try {
+            final Struct.U32 config = configurationMap.getValue(UID_RULES_CONFIGURATION_KEY);
+            return (config.val & match) != 0;
+        } catch (ErrnoException e) {
+            throw new ServiceSpecificException(e.errno,
+                    "Unable to get firewall chain status: " + Os.strerror(e.errno));
+        }
+    }
+
+    /**
+     * Get firewall rule of specified firewall chain on specified uid.
+     *
+     * @param uidOwnerMap target uidOwnerMap.
+     * @param chain target chain.
+     * @param uid target uid.
+     * @return either FIREWALL_RULE_ALLOW or FIREWALL_RULE_DENY
+     * @throws UnsupportedOperationException if called on pre-T devices.
+     * @throws ServiceSpecificException      in case of failure, with an error code indicating the
+     *                                       cause of the failure.
+     */
+    public static int getUidRule(final IBpfMap<Struct.S32, UidOwnerValue> uidOwnerMap,
+            final int chain, final int uid) {
+        throwIfPreT("getUidRule is not available on pre-T devices");
+
+        final long match = getMatchByFirewallChain(chain);
+        final boolean isAllowList = isFirewallAllowList(chain);
+        try {
+            final UidOwnerValue uidMatch = uidOwnerMap.getValue(new Struct.S32(uid));
+            final boolean isMatchEnabled = uidMatch != null && (uidMatch.rule & match) != 0;
+            return isMatchEnabled == isAllowList ? FIREWALL_RULE_ALLOW : FIREWALL_RULE_DENY;
+        } catch (ErrnoException e) {
+            throw new ServiceSpecificException(e.errno,
+                    "Unable to get uid rule status: " + Os.strerror(e.errno));
+        }
+    }
+}
diff --git a/framework/src/android/net/BpfNetMapsUtils.java b/framework/src/android/net/BpfNetMapsUtils.java
index d464e3d..28d5891 100644
--- a/framework/src/android/net/BpfNetMapsUtils.java
+++ b/framework/src/android/net/BpfNetMapsUtils.java
@@ -39,6 +39,8 @@
 import android.os.ServiceSpecificException;
 import android.util.Pair;
 
+import com.android.modules.utils.build.SdkLevel;
+
 import java.util.StringJoiner;
 
 /**
@@ -124,4 +126,15 @@
         }
         return sj.toString();
     }
+
+    public static final boolean PRE_T = !SdkLevel.isAtLeastT();
+
+    /**
+     * Throw UnsupportedOperationException if SdkLevel is before T.
+     */
+    public static void throwIfPreT(final String msg) {
+        if (PRE_T) {
+            throw new UnsupportedOperationException(msg);
+        }
+    }
 }
diff --git a/framework/src/android/net/UidOwnerValue.java b/framework/src/android/net/UidOwnerValue.java
new file mode 100644
index 0000000..e8ae604
--- /dev/null
+++ b/framework/src/android/net/UidOwnerValue.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+package android.net;
+
+import com.android.net.module.util.Struct;
+
+/**
+ * Value type for per uid traffic control configuration map.
+ *
+ * @hide
+ */
+public class UidOwnerValue extends Struct {
+    // Allowed interface index. Only applicable if IIF_MATCH is set in the rule bitmask below.
+    @Field(order = 0, type = Type.S32)
+    public final int iif;
+
+    // A bitmask of match type.
+    @Field(order = 1, type = Type.U32)
+    public final long rule;
+
+    public UidOwnerValue(final int iif, final long rule) {
+        this.iif = iif;
+        this.rule = rule;
+    }
+}