diff --git a/Cronet/tests/cts/AndroidTest.xml b/Cronet/tests/cts/AndroidTest.xml
index 1f6bdb3..d2422f1 100644
--- a/Cronet/tests/cts/AndroidTest.xml
+++ b/Cronet/tests/cts/AndroidTest.xml
@@ -17,7 +17,8 @@
 <configuration description="Config for CTS Cronet test cases">
     <option name="test-suite-tag" value="cts" />
     <option name="config-descriptor:metadata" key="component" value="networking" />
-    <option name="config-descriptor:metadata" key="parameter" value="instant_app" />
+    <!-- Instant apps cannot create sockets. See b/264248246 -->
+    <option name="config-descriptor:metadata" key="parameter" value="not_instant_app" />
     <option name="config-descriptor:metadata" key="parameter" value="multi_abi" />
     <option name="config-descriptor:metadata" key="parameter" value="secondary_user" />
     <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
diff --git a/Tethering/common/TetheringLib/Android.bp b/Tethering/common/TetheringLib/Android.bp
index 481557b..3f4da10 100644
--- a/Tethering/common/TetheringLib/Android.bp
+++ b/Tethering/common/TetheringLib/Android.bp
@@ -17,6 +17,18 @@
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
+// TODO: This is currently not used, but is being merged early, so Cronet can be disabled in
+// tm-mainline-prod.
+// Both cronet_java_defaults and cronet_java_prejarjar_defaults can be used to
+// specify a java_defaults target that either enables or disables Cronet. This
+// is used to disable Cronet on tm-mainline-prod.
+// Note: they must either both be enabled or disabled.
+cronet_java_defaults = "CronetJavaDefaultsEnabled"
+cronet_java_prejarjar_defaults = "CronetJavaPrejarjarDefaultsEnabled"
+// This is a placeholder comment to avoid merge conflicts
+// as cronet_defaults may have different values
+// depending on the branch
+
 java_sdk_library {
     name: "framework-tethering",
     defaults: ["framework-module-defaults"],
diff --git a/Tethering/src/com/android/networkstack/tethering/BpfCoordinator.java b/Tethering/src/com/android/networkstack/tethering/BpfCoordinator.java
index 72f83fa..44d3ffc 100644
--- a/Tethering/src/com/android/networkstack/tethering/BpfCoordinator.java
+++ b/Tethering/src/com/android/networkstack/tethering/BpfCoordinator.java
@@ -27,6 +27,7 @@
 import static android.system.OsConstants.ETH_P_IP;
 import static android.system.OsConstants.ETH_P_IPV6;
 
+import static com.android.net.module.util.NetworkStackConstants.IPV4_MIN_MTU;
 import static com.android.net.module.util.ip.ConntrackMonitor.ConntrackEvent;
 import static com.android.networkstack.tethering.BpfUtils.DOWNSTREAM;
 import static com.android.networkstack.tethering.BpfUtils.UPSTREAM;
@@ -82,6 +83,8 @@
 import java.net.Inet4Address;
 import java.net.Inet6Address;
 import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
 import java.net.UnknownHostException;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -143,6 +146,8 @@
     static final int NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED = 432_000;
     @VisibleForTesting
     static final int NF_CONNTRACK_UDP_TIMEOUT_STREAM = 180;
+    @VisibleForTesting
+    static final int INVALID_MTU = 0;
 
     // List of TCP port numbers which aren't offloaded because the packets require the netfilter
     // conntrack helper. See also TetherController::setForwardRules in netd.
@@ -263,6 +268,10 @@
     // TODO: Support multi-upstream interfaces.
     private int mLastIPv4UpstreamIfindex = 0;
 
+    // Tracks the IPv4 upstream interface information.
+    @Nullable
+    private UpstreamInfo mIpv4UpstreamInfo = null;
+
     // Runnable that used by scheduling next polling of stats.
     private final Runnable mScheduledPollingStats = () -> {
         updateForwardedStats();
@@ -320,6 +329,19 @@
             return SdkLevel.isAtLeastS();
         }
 
+        /**
+         * Gets the MTU of the given interface.
+         */
+        public int getNetworkInterfaceMtu(@NonNull String iface) {
+            try {
+                final NetworkInterface networkInterface = NetworkInterface.getByName(iface);
+                return networkInterface == null ? INVALID_MTU : networkInterface.getMTU();
+            } catch (SocketException e) {
+                Log.e(TAG, "Could not get MTU for interface " + iface, e);
+                return INVALID_MTU;
+            }
+        }
+
         /** Get downstream4 BPF map. */
         @Nullable public IBpfMap<Tether4Key, Tether4Value> getBpfDownstream4Map() {
             if (!isAtLeastS()) return null;
@@ -868,6 +890,7 @@
         if (!isUsingBpf()) return;
 
         int upstreamIndex = 0;
+        int mtu = INVALID_MTU;
 
         // This will not work on a network that is using 464xlat because hasIpv4Address will not be
         // true.
@@ -877,6 +900,17 @@
             final String ifaceName = ns.linkProperties.getInterfaceName();
             final InterfaceParams params = mDeps.getInterfaceParams(ifaceName);
             final boolean isVcn = isVcnInterface(ifaceName);
+            mtu = ns.linkProperties.getMtu();
+            if (mtu == INVALID_MTU) {
+                // Get mtu via kernel if mtu is not found in LinkProperties.
+                mtu = mDeps.getNetworkInterfaceMtu(ifaceName);
+            }
+
+            // Use default mtu if can't find any.
+            if (mtu == INVALID_MTU) mtu = NetworkStackConstants.ETHER_MTU;
+            // Clamp to minimum ipv4 mtu
+            if (mtu < IPV4_MIN_MTU) mtu = IPV4_MIN_MTU;
+
             if (!isVcn && params != null && !params.hasMacAddress /* raw ip upstream only */) {
                 upstreamIndex = params.index;
             }
@@ -905,8 +939,11 @@
         // after the upstream is lost do not incorrectly add rules pointing at the upstream.
         if (upstreamIndex == 0) {
             mIpv4UpstreamIndices.clear();
+            mIpv4UpstreamInfo = null;
             return;
         }
+
+        mIpv4UpstreamInfo = new UpstreamInfo(upstreamIndex, mtu);
         Collection<InetAddress> addresses = ns.linkProperties.getAddresses();
         for (final InetAddress addr: addresses) {
             if (isValidUpstreamIpv4Address(addr)) {
@@ -1051,6 +1088,9 @@
         }
         pw.decreaseIndent();
 
+        pw.println("IPv4 Upstream Information: "
+                + (mIpv4UpstreamInfo != null ? mIpv4UpstreamInfo : "<empty>"));
+
         pw.println();
         pw.println("Forwarding counters:");
         pw.increaseIndent();
@@ -1258,10 +1298,10 @@
 
         final String ageStr = (value.lastUsed == 0) ? "-"
                 : String.format("%dms", (now - value.lastUsed) / 1_000_000);
-        return String.format("%s [%s] %d(%s) %s:%d -> %d(%s) %s:%d -> %s:%d [%s] %s",
+        return String.format("%s [%s] %d(%s) %s:%d -> %d(%s) %s:%d -> %s:%d [%s] %d %s",
                 l4protoToString(key.l4proto), key.dstMac, key.iif, getIfName(key.iif),
                 src4, key.srcPort, value.oif, getIfName(value.oif),
-                public4, publicPort, dst4, value.dstPort, value.ethDstMac, ageStr);
+                public4, publicPort, dst4, value.dstPort, value.ethDstMac, value.pmtu, ageStr);
     }
 
     private void dumpIpv4ForwardingRuleMap(long now, boolean downstream,
@@ -1283,13 +1323,13 @@
         try (IBpfMap<Tether4Key, Tether4Value> upstreamMap = mDeps.getBpfUpstream4Map();
                 IBpfMap<Tether4Key, Tether4Value> downstreamMap = mDeps.getBpfDownstream4Map()) {
             pw.println("IPv4 Upstream: proto [inDstMac] iif(iface) src -> nat -> "
-                    + "dst [outDstMac] age");
+                    + "dst [outDstMac] pmtu age");
             pw.increaseIndent();
             dumpIpv4ForwardingRuleMap(now, UPSTREAM, upstreamMap, pw);
             pw.decreaseIndent();
 
             pw.println("IPv4 Downstream: proto [inDstMac] iif(iface) src -> nat -> "
-                    + "dst [outDstMac] age");
+                    + "dst [outDstMac] pmtu age");
             pw.increaseIndent();
             dumpIpv4ForwardingRuleMap(now, DOWNSTREAM, downstreamMap, pw);
             pw.decreaseIndent();
@@ -1540,6 +1580,28 @@
         }
     }
 
+    /** Upstream information class. */
+    private static final class UpstreamInfo {
+        // TODO: add clat interface information
+        public final int ifIndex;
+        public final int mtu;
+
+        private UpstreamInfo(final int ifIndex, final int mtu) {
+            this.ifIndex = ifIndex;
+            this.mtu = mtu;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(ifIndex, mtu);
+        }
+
+        @Override
+        public String toString() {
+            return String.format("ifIndex: %d, mtu: %d", ifIndex, mtu);
+        }
+    }
+
     /**
      * A BPF tethering stats provider to provide network statistics to the system.
      * Note that this class' data may only be accessed on the handler thread.
@@ -1711,20 +1773,20 @@
 
         @NonNull
         private Tether4Value makeTetherUpstream4Value(@NonNull ConntrackEvent e,
-                int upstreamIndex) {
-            return new Tether4Value(upstreamIndex,
+                @NonNull UpstreamInfo upstreamInfo) {
+            return new Tether4Value(upstreamInfo.ifIndex,
                     NULL_MAC_ADDRESS /* ethDstMac (rawip) */,
                     NULL_MAC_ADDRESS /* ethSrcMac (rawip) */, ETH_P_IP,
-                    NetworkStackConstants.ETHER_MTU, toIpv4MappedAddressBytes(e.tupleReply.dstIp),
+                    upstreamInfo.mtu, toIpv4MappedAddressBytes(e.tupleReply.dstIp),
                     toIpv4MappedAddressBytes(e.tupleReply.srcIp), e.tupleReply.dstPort,
                     e.tupleReply.srcPort, 0 /* lastUsed, filled by bpf prog only */);
         }
 
         @NonNull
         private Tether4Value makeTetherDownstream4Value(@NonNull ConntrackEvent e,
-                @NonNull ClientInfo c, int upstreamIndex) {
+                @NonNull ClientInfo c, @NonNull UpstreamInfo upstreamInfo) {
             return new Tether4Value(c.downstreamIfindex,
-                    c.clientMac, c.downstreamMac, ETH_P_IP, NetworkStackConstants.ETHER_MTU,
+                    c.clientMac, c.downstreamMac, ETH_P_IP, upstreamInfo.mtu,
                     toIpv4MappedAddressBytes(e.tupleOrig.dstIp),
                     toIpv4MappedAddressBytes(e.tupleOrig.srcIp),
                     e.tupleOrig.dstPort, e.tupleOrig.srcPort,
@@ -1773,9 +1835,11 @@
                 return;
             }
 
-            final Tether4Value upstream4Value = makeTetherUpstream4Value(e, upstreamIndex);
+            if (mIpv4UpstreamInfo == null || mIpv4UpstreamInfo.ifIndex != upstreamIndex) return;
+
+            final Tether4Value upstream4Value = makeTetherUpstream4Value(e, mIpv4UpstreamInfo);
             final Tether4Value downstream4Value = makeTetherDownstream4Value(e, tetherClient,
-                    upstreamIndex);
+                    mIpv4UpstreamInfo);
 
             maybeAddDevMap(upstreamIndex, tetherClient.downstreamIfindex);
             maybeSetLimit(upstreamIndex);
diff --git a/Tethering/src/com/android/networkstack/tethering/Tethering.java b/Tethering/src/com/android/networkstack/tethering/Tethering.java
index b3ec805..e1b7016 100644
--- a/Tethering/src/com/android/networkstack/tethering/Tethering.java
+++ b/Tethering/src/com/android/networkstack/tethering/Tethering.java
@@ -2407,6 +2407,9 @@
 
     /** Unregister tethering event callback */
     void unregisterTetheringEventCallback(ITetheringEventCallback callback) {
+        if (callback == null) {
+            throw new NullPointerException();
+        }
         mHandler.post(() -> {
             mTetheringEventCallbacks.unregister(callback);
         });
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/BpfCoordinatorTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/BpfCoordinatorTest.java
index ace5f15..1978e99 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/BpfCoordinatorTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/BpfCoordinatorTest.java
@@ -32,6 +32,7 @@
 
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.doReturn;
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.staticMockMarker;
+import static com.android.net.module.util.NetworkStackConstants.IPV4_MIN_MTU;
 import static com.android.net.module.util.ip.ConntrackMonitor.ConntrackEvent;
 import static com.android.net.module.util.netlink.ConntrackMessage.DYING_MASK;
 import static com.android.net.module.util.netlink.ConntrackMessage.ESTABLISHED_MASK;
@@ -41,6 +42,7 @@
 import static com.android.net.module.util.netlink.NetlinkConstants.IPCTNL_MSG_CT_DELETE;
 import static com.android.net.module.util.netlink.NetlinkConstants.IPCTNL_MSG_CT_NEW;
 import static com.android.networkstack.tethering.BpfCoordinator.CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS;
+import static com.android.networkstack.tethering.BpfCoordinator.INVALID_MTU;
 import static com.android.networkstack.tethering.BpfCoordinator.NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED;
 import static com.android.networkstack.tethering.BpfCoordinator.NF_CONNTRACK_UDP_TIMEOUT_STREAM;
 import static com.android.networkstack.tethering.BpfCoordinator.NON_OFFLOADED_UPSTREAM_IPV4_TCP_PORTS;
@@ -283,6 +285,11 @@
             private int mDstPort = REMOTE_PORT;
             private long mLastUsed = 0;
 
+            public Builder setPmtu(short pmtu) {
+                mPmtu = pmtu;
+                return this;
+            }
+
             public Tether4Value build() {
                 return new Tether4Value(mOif, mEthDstMac, mEthSrcMac, mEthProto, mPmtu,
                         mSrc46, mDst46, mSrcPort, mDstPort, mLastUsed);
@@ -303,6 +310,11 @@
             private int mDstPort = PRIVATE_PORT;
             private long mLastUsed = 0;
 
+            public Builder setPmtu(short pmtu) {
+                mPmtu = pmtu;
+                return this;
+            }
+
             public Tether4Value build() {
                 return new Tether4Value(mOif, mEthDstMac, mEthSrcMac, mEthProto, mPmtu,
                         mSrc46, mDst46, mSrcPort, mDstPort, mLastUsed);
@@ -375,6 +387,7 @@
     private HashMap<IpServer, HashMap<Inet4Address, ClientInfo>> mTetherClients;
 
     private long mElapsedRealtimeNanos = 0;
+    private int mMtu = NetworkStackConstants.ETHER_MTU;
     private final ArgumentCaptor<ArrayList> mStringArrayCaptor =
             ArgumentCaptor.forClass(ArrayList.class);
     private final TestLooper mTestLooper = new TestLooper();
@@ -430,6 +443,10 @@
                         return mElapsedRealtimeNanos;
                     }
 
+                    public int getNetworkInterfaceMtu(@NonNull String iface) {
+                        return mMtu;
+                    }
+
                     @Nullable
                     public IBpfMap<Tether4Key, Tether4Value> getBpfDownstream4Map() {
                         return mBpfDownstream4Map;
@@ -1518,6 +1535,7 @@
         final LinkProperties lp = new LinkProperties();
         lp.setInterfaceName(upstreamInfo.interfaceParams.name);
         lp.addLinkAddress(new LinkAddress(upstreamInfo.address, 32 /* prefix length */));
+        lp.setMtu(mMtu);
         final NetworkCapabilities capabilities = new NetworkCapabilities()
                 .addTransportType(upstreamInfo.transportType);
         coordinator.updateUpstreamNetworkState(new UpstreamNetworkState(lp, capabilities,
@@ -2195,4 +2213,72 @@
 
         verifyDump(coordinator);
     }
+
+    private void verifyAddTetherOffloadRule4Mtu(final int ifaceMtu, final boolean isKernelMtu,
+            final int expectedMtu) throws Exception {
+        // BpfCoordinator#updateUpstreamNetworkState geta mtu from LinkProperties. If not found,
+        // try to get from kernel.
+        if (isKernelMtu) {
+            // LinkProperties mtu is invalid and kernel mtu is valid.
+            mMtu = INVALID_MTU;
+            doReturn(ifaceMtu).when(mDeps).getNetworkInterfaceMtu(any());
+        } else {
+            // LinkProperties mtu is valid and kernel mtu is invalid.
+            mMtu = ifaceMtu;
+            doReturn(INVALID_MTU).when(mDeps).getNetworkInterfaceMtu(any());
+        }
+
+        final BpfCoordinator coordinator = makeBpfCoordinator();
+        initBpfCoordinatorForRule4(coordinator);
+
+        final Tether4Key expectedUpstream4KeyTcp = new TestUpstream4Key.Builder()
+                .setProto(IPPROTO_TCP)
+                .build();
+        final Tether4Key expectedDownstream4KeyTcp = new TestDownstream4Key.Builder()
+                .setProto(IPPROTO_TCP)
+                .build();
+        final Tether4Value expectedUpstream4ValueTcp = new TestUpstream4Value.Builder()
+                .setPmtu((short) expectedMtu)
+                .build();
+        final Tether4Value expectedDownstream4ValueTcp = new TestDownstream4Value.Builder()
+                .setPmtu((short) expectedMtu)
+                .build();
+
+        mConsumer.accept(new TestConntrackEvent.Builder()
+                .setMsgType(IPCTNL_MSG_CT_NEW)
+                .setProto(IPPROTO_TCP)
+                .build());
+        verify(mBpfUpstream4Map)
+                .insertEntry(eq(expectedUpstream4KeyTcp), eq(expectedUpstream4ValueTcp));
+        verify(mBpfDownstream4Map)
+                .insertEntry(eq(expectedDownstream4KeyTcp), eq(expectedDownstream4ValueTcp));
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testAddTetherOffloadRule4LowMtuFromLinkProperties() throws Exception {
+        verifyAddTetherOffloadRule4Mtu(
+                IPV4_MIN_MTU, false /* isKernelMtu */, IPV4_MIN_MTU /* expectedMtu */);
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testAddTetherOffloadRule4LowMtuFromKernel() throws Exception {
+        verifyAddTetherOffloadRule4Mtu(
+                IPV4_MIN_MTU, true /* isKernelMtu */, IPV4_MIN_MTU /* expectedMtu */);
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testAddTetherOffloadRule4LessThanIpv4MinMtu() throws Exception {
+        verifyAddTetherOffloadRule4Mtu(
+                IPV4_MIN_MTU - 1, false /* isKernelMtu */, IPV4_MIN_MTU /* expectedMtu */);
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testAddTetherOffloadRule4InvalidMtu() throws Exception {
+        verifyAddTetherOffloadRule4Mtu(INVALID_MTU, false /* isKernelMtu */,
+                NetworkStackConstants.ETHER_MTU /* expectedMtu */);
+    }
 }
diff --git a/bpf_progs/clatd.c b/bpf_progs/clatd.c
index 563ca5e..7350209 100644
--- a/bpf_progs/clatd.c
+++ b/bpf_progs/clatd.c
@@ -52,9 +52,17 @@
     __be32 identification;
 };
 
+// constants for passing in to 'bool is_ethernet'
+static const bool RAWIP = false;
+static const bool ETHER = true;
+
+#define KVER_4_14 KVER(4, 14, 0)
+
 DEFINE_BPF_MAP_GRW(clat_ingress6_map, HASH, ClatIngress6Key, ClatIngress6Value, 16, AID_SYSTEM)
 
-static inline __always_inline int nat64(struct __sk_buff* skb, bool is_ethernet) {
+static inline __always_inline int nat64(struct __sk_buff* skb,
+                                        const bool is_ethernet,
+                                        const unsigned kver) {
     // Require ethernet dst mac address to be our unicast address.
     if (is_ethernet && (skb->pkt_type != PACKET_HOST)) return TC_ACT_PIPE;
 
@@ -103,6 +111,31 @@
     __u8 proto = ip6->nexthdr;
     __be16 ip_id = 0;
     __be16 frag_off = htons(IP_DF);
+    __u16 tot_len = ntohs(ip6->payload_len) + sizeof(struct iphdr);  // cannot overflow, see above
+
+    if (proto == IPPROTO_FRAGMENT) {
+        // Fragment handling requires bpf_skb_adjust_room which is 4.14+
+        if (kver < KVER_4_14) return TC_ACT_PIPE;
+
+        // Must have (ethernet and) ipv6 header and ipv6 fragment extension header
+        if (data + l2_header_size + sizeof(*ip6) + sizeof(struct frag_hdr) > data_end)
+            return TC_ACT_PIPE;
+        const struct frag_hdr *frag = (const struct frag_hdr *)(ip6 + 1);
+        proto = frag->nexthdr;
+        // RFC6145: use bottom 16-bits of network endian 32-bit IPv6 ID field for 16-bit IPv4 field.
+        // this is equivalent to: ip_id = htons(ntohl(frag->identification));
+        ip_id = frag->identification >> 16;
+        // Conversion of 16-bit IPv6 frag offset to 16-bit IPv4 frag offset field.
+        // IPv6 is '13 bits of offset in multiples of 8' + 2 zero bits + more fragment bit
+        // IPv4 is zero bit + don't frag bit + more frag bit + '13 bits of offset in multiples of 8'
+        frag_off = ntohs(frag->frag_off);
+        frag_off = ((frag_off & 1) << 13) | (frag_off >> 3);
+        frag_off = htons(frag_off);
+        // Note that by construction tot_len is guaranteed to not underflow here
+        tot_len -= sizeof(struct frag_hdr);
+        // This is a badly formed IPv6 packet with less payload than the size of an IPv6 Frag EH
+        if (tot_len < sizeof(struct iphdr)) return TC_ACT_PIPE;
+    }
 
     switch (proto) {
         case IPPROTO_TCP:  // For TCP & UDP the checksum neutrality of the chosen IPv6
@@ -129,7 +162,7 @@
             .version = 4,                                                      // u4
             .ihl = sizeof(struct iphdr) / sizeof(__u32),                       // u4
             .tos = (ip6->priority << 4) + (ip6->flow_lbl[0] >> 4),             // u8
-            .tot_len = htons(ntohs(ip6->payload_len) + sizeof(struct iphdr)),  // be16
+            .tot_len = htons(tot_len),                                         // be16
             .id = ip_id,                                                       // be16
             .frag_off = frag_off,                                              // be16
             .ttl = ip6->hop_limit,                                             // u8
@@ -186,6 +219,26 @@
     //   return -ENOTSUPP;
     bpf_csum_update(skb, sum6);
 
+    // Technically 'kver < KVER_4_14' already implies 'frag_off == htons(IP_DF)' due to logic above,
+    // thus the initial 'kver >= KVER_4_14' check here is entirely superfluous.
+    //
+    // However, we *need* the compiler (when compiling the program for 4.9) to entirely
+    // optimize out the call to bpf_skb_adjust_room() bpf helper: it's not enough for it to emit
+    // an unreachable call to it, it must *not* emit it at all (otherwise the 4.9 kernel's
+    // bpf verifier will refuse to load a program with an unknown bpf helper call)
+    //
+    // This is easiest to achieve by being very explicit in the if clause,
+    // better safe than sorry...
+    //
+    // Note: we currently have no TreeHugger coverage for 4.9-T devices (there are no such
+    // Pixel or cuttlefish devices), so likely you won't notice for months if this breaks...
+    if (kver >= KVER_4_14 && frag_off != htons(IP_DF)) {
+        // If we're converting an IPv6 Fragment, we need to trim off 8 more bytes
+        // We're beyond recovery on error here... but hard to imagine how this could fail.
+        if (bpf_skb_adjust_room(skb, -(__s32)sizeof(struct frag_hdr), BPF_ADJ_ROOM_NET, /*flags*/0))
+            return TC_ACT_SHOT;
+    }
+
     // bpf_skb_change_proto() invalidates all pointers - reload them.
     data = (void*)(long)skb->data;
     data_end = (void*)(long)skb->data_end;
@@ -214,14 +267,24 @@
     return TC_ACT_PIPE;
 }
 
-DEFINE_BPF_PROG("schedcls/ingress6/clat_ether", AID_ROOT, AID_SYSTEM, sched_cls_ingress6_clat_ether)
+DEFINE_BPF_PROG_KVER("schedcls/ingress6/clat_ether$4_14", AID_ROOT, AID_SYSTEM, sched_cls_ingress6_clat_ether_4_14, KVER_4_14)
 (struct __sk_buff* skb) {
-    return nat64(skb, true);
+    return nat64(skb, ETHER, KVER_4_14);
 }
 
-DEFINE_BPF_PROG("schedcls/ingress6/clat_rawip", AID_ROOT, AID_SYSTEM, sched_cls_ingress6_clat_rawip)
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/ingress6/clat_ether$4_9", AID_ROOT, AID_SYSTEM, sched_cls_ingress6_clat_ether_4_9, KVER_NONE, KVER_4_14)
 (struct __sk_buff* skb) {
-    return nat64(skb, false);
+    return nat64(skb, ETHER, KVER_NONE);
+}
+
+DEFINE_BPF_PROG_KVER("schedcls/ingress6/clat_rawip$4_14", AID_ROOT, AID_SYSTEM, sched_cls_ingress6_clat_rawip_4_14, KVER_4_14)
+(struct __sk_buff* skb) {
+    return nat64(skb, RAWIP, KVER_4_14);
+}
+
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/ingress6/clat_rawip$4_9", AID_ROOT, AID_SYSTEM, sched_cls_ingress6_clat_rawip_4_9, KVER_NONE, KVER_4_14)
+(struct __sk_buff* skb) {
+    return nat64(skb, RAWIP, KVER_NONE);
 }
 
 DEFINE_BPF_MAP_GRW(clat_egress4_map, HASH, ClatEgress4Key, ClatEgress4Value, 16, AID_SYSTEM)
diff --git a/bpf_progs/netd.c b/bpf_progs/netd.c
index b0246f6..43920d0 100644
--- a/bpf_progs/netd.c
+++ b/bpf_progs/netd.c
@@ -109,8 +109,9 @@
 // (this is because these are currently attached by the mainline provided libnetd_updatable .so
 // which is loaded into netd and thus runs as netd uid/gid/selinux context)
 #define DEFINE_NETD_BPF_PROG_KVER_RANGE(SECTION_NAME, prog_uid, prog_gid, the_prog, minKV, maxKV) \
-    DEFINE_BPF_PROG_EXT(SECTION_NAME, prog_uid, prog_gid, the_prog, \
-                        minKV, maxKV, false, "fs_bpf_netd_readonly", "")
+    DEFINE_BPF_PROG_EXT(SECTION_NAME, prog_uid, prog_gid, the_prog,                               \
+                        minKV, maxKV, BPFLOADER_MIN_VER, BPFLOADER_MAX_VER, false,                \
+                        "fs_bpf_netd_readonly", "", false, false, false)
 
 #define DEFINE_NETD_BPF_PROG_KVER(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv) \
     DEFINE_NETD_BPF_PROG_KVER_RANGE(SECTION_NAME, prog_uid, prog_gid, the_prog, min_kv, KVER_INF)
@@ -120,8 +121,9 @@
 
 // programs that only need to be usable by the system server
 #define DEFINE_SYS_BPF_PROG(SECTION_NAME, prog_uid, prog_gid, the_prog) \
-    DEFINE_BPF_PROG_EXT(SECTION_NAME, prog_uid, prog_gid, the_prog, \
-                        KVER_NONE, KVER_INF, false, "fs_bpf_net_shared", "")
+    DEFINE_BPF_PROG_EXT(SECTION_NAME, prog_uid, prog_gid, the_prog, KVER_NONE, KVER_INF,  \
+                        BPFLOADER_MIN_VER, BPFLOADER_MAX_VER, false, "fs_bpf_net_shared", \
+                        "", false, false, false)
 
 static __always_inline int is_system_uid(uint32_t uid) {
     // MIN_SYSTEM_UID is AID_ROOT == 0, so uint32_t is *always* >= 0
diff --git a/framework-t/src/android/net/IpSecManager.java b/framework-t/src/android/net/IpSecManager.java
index 1c83e09..ff021d6 100644
--- a/framework-t/src/android/net/IpSecManager.java
+++ b/framework-t/src/android/net/IpSecManager.java
@@ -610,7 +610,7 @@
             } catch (RemoteException e) {
                 throw e.rethrowFromSystemServer();
             }
-            mCloseGuard.open("constructor");
+            mCloseGuard.open("close");
         }
 
         /** Get the encapsulation socket's file descriptor. */
@@ -890,7 +890,7 @@
             } catch (RemoteException e) {
                 throw e.rethrowFromSystemServer();
             }
-            mCloseGuard.open("constructor");
+            mCloseGuard.open("close");
         }
 
         /**
diff --git a/framework/api/module-lib-current.txt b/framework/api/module-lib-current.txt
index 7669e0e..f623b05 100644
--- a/framework/api/module-lib-current.txt
+++ b/framework/api/module-lib-current.txt
@@ -63,6 +63,7 @@
     field public static final int FIREWALL_RULE_DENY = 2; // 0x2
     field public static final int PROFILE_NETWORK_PREFERENCE_DEFAULT = 0; // 0x0
     field public static final int PROFILE_NETWORK_PREFERENCE_ENTERPRISE = 1; // 0x1
+    field public static final int PROFILE_NETWORK_PREFERENCE_ENTERPRISE_BLOCKING = 3; // 0x3
     field public static final int PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK = 2; // 0x2
   }
 
diff --git a/framework/src/android/net/ConnectivityManager.java b/framework/src/android/net/ConnectivityManager.java
index 60bc68c..40defd4 100644
--- a/framework/src/android/net/ConnectivityManager.java
+++ b/framework/src/android/net/ConnectivityManager.java
@@ -1232,16 +1232,19 @@
     }
 
     /**
-     * Preference for {@link ProfileNetworkPreference#setPreference(int)}.
+     * Preference for {@link ProfileNetworkPreference.Builder#setPreference(int)}.
      * See {@link #setProfileNetworkPreferences(UserHandle, List, Executor, Runnable)}
-     * Specify that the traffic for this user should by follow the default rules.
+     * Specify that the traffic for this user should by follow the default rules:
+     * applications in the profile designated by the UserHandle behave like any
+     * other application and use the system default network as their default
+     * network. Compare other PROFILE_NETWORK_PREFERENCE_* settings.
      * @hide
      */
     @SystemApi(client = MODULE_LIBRARIES)
     public static final int PROFILE_NETWORK_PREFERENCE_DEFAULT = 0;
 
     /**
-     * Preference for {@link ProfileNetworkPreference#setPreference(int)}.
+     * Preference for {@link ProfileNetworkPreference.Builder#setPreference(int)}.
      * See {@link #setProfileNetworkPreferences(UserHandle, List, Executor, Runnable)}
      * Specify that the traffic for this user should by default go on a network with
      * {@link NetworkCapabilities#NET_CAPABILITY_ENTERPRISE}, and on the system default network
@@ -1252,16 +1255,38 @@
     public static final int PROFILE_NETWORK_PREFERENCE_ENTERPRISE = 1;
 
     /**
-     * Preference for {@link ProfileNetworkPreference#setPreference(int)}.
+     * Preference for {@link ProfileNetworkPreference.Builder#setPreference(int)}.
      * See {@link #setProfileNetworkPreferences(UserHandle, List, Executor, Runnable)}
      * Specify that the traffic for this user should by default go on a network with
      * {@link NetworkCapabilities#NET_CAPABILITY_ENTERPRISE} and if no such network is available
-     * should not go on the system default network
+     * should not have a default network at all (that is, network accesses that
+     * do not specify a network explicitly terminate with an error), even if there
+     * is a system default network available to apps outside this preference.
+     * The apps can still use a non-enterprise network if they request it explicitly
+     * provided that specific network doesn't require any specific permission they
+     * do not hold.
      * @hide
      */
     @SystemApi(client = MODULE_LIBRARIES)
     public static final int PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK = 2;
 
+    /**
+     * Preference for {@link ProfileNetworkPreference.Builder#setPreference(int)}.
+     * See {@link #setProfileNetworkPreferences(UserHandle, List, Executor, Runnable)}
+     * Specify that the traffic for this user should by default go on a network with
+     * {@link NetworkCapabilities#NET_CAPABILITY_ENTERPRISE}.
+     * If there is no such network, the apps will have no default
+     * network at all, even if there are available non-enterprise networks on the
+     * device (that is, network accesses that do not specify a network explicitly
+     * terminate with an error). Additionally, the designated apps should be
+     * blocked from using any non-enterprise network even if they specify it
+     * explicitly, unless they hold specific privilege overriding this (see
+     * {@link android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS}).
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int PROFILE_NETWORK_PREFERENCE_ENTERPRISE_BLOCKING = 3;
+
     /** @hide */
     @Retention(RetentionPolicy.SOURCE)
     @IntDef(value = {
diff --git a/service-t/src/com/android/server/net/NetworkStatsService.java b/service-t/src/com/android/server/net/NetworkStatsService.java
index cf53002..3a17bdd 100644
--- a/service-t/src/com/android/server/net/NetworkStatsService.java
+++ b/service-t/src/com/android/server/net/NetworkStatsService.java
@@ -69,6 +69,7 @@
 import android.annotation.Nullable;
 import android.annotation.TargetApi;
 import android.app.AlarmManager;
+import android.app.BroadcastOptions;
 import android.app.PendingIntent;
 import android.app.usage.NetworkStatsManager;
 import android.content.ApexEnvironment;
@@ -114,6 +115,7 @@
 import android.net.netstats.provider.NetworkStatsProvider;
 import android.os.Binder;
 import android.os.Build;
+import android.os.Bundle;
 import android.os.DropBoxManager;
 import android.os.Environment;
 import android.os.Handler;
@@ -149,6 +151,7 @@
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.FileRotator;
+import com.android.modules.utils.build.SdkLevel;
 import com.android.net.module.util.BaseNetdUnsolicitedEventListener;
 import com.android.net.module.util.BestClock;
 import com.android.net.module.util.BinderUtils;
@@ -166,6 +169,9 @@
 import com.android.net.module.util.Struct.U8;
 import com.android.net.module.util.bpf.CookieTagMapKey;
 import com.android.net.module.util.bpf.CookieTagMapValue;
+import com.android.networkstack.apishim.BroadcastOptionsShimImpl;
+import com.android.networkstack.apishim.ConstantsShim;
+import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
 import com.android.server.BpfNetMaps;
 
 import java.io.File;
@@ -526,8 +532,22 @@
                 case MSG_BROADCAST_NETWORK_STATS_UPDATED: {
                     final Intent updatedIntent = new Intent(ACTION_NETWORK_STATS_UPDATED);
                     updatedIntent.setFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
+                    Bundle opts = null;
+                    if (SdkLevel.isAtLeastU()) {
+                        try {
+                            // This allows us to discard older broadcasts still waiting to
+                            // be delivered.
+                            opts = BroadcastOptionsShimImpl.newInstance(
+                                    BroadcastOptions.makeBasic())
+                                    .setDeliveryGroupPolicy(
+                                            ConstantsShim.DELIVERY_GROUP_POLICY_MOST_RECENT)
+                                    .toBundle();
+                        } catch (UnsupportedApiLevelException e) {
+                            Log.wtf(TAG, "Using unsupported API" + e);
+                        }
+                    }
                     mContext.sendBroadcastAsUser(updatedIntent, UserHandle.ALL,
-                            READ_NETWORK_USAGE_HISTORY);
+                            READ_NETWORK_USAGE_HISTORY, opts);
                     break;
                 }
             }
diff --git a/service/Android.bp b/service/Android.bp
index 224fa19..8fa6436 100644
--- a/service/Android.bp
+++ b/service/Android.bp
@@ -206,6 +206,7 @@
     libs: [
         "framework-annotations-lib",
         "framework-connectivity-pre-jarjar",
+        "framework-connectivity-t-pre-jarjar",
         "framework-tethering",
         "framework-wifi",
         "service-connectivity-pre-jarjar",
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsAdvertiser.java b/service/mdns/com/android/server/connectivity/mdns/MdnsAdvertiser.java
index dee78fd..185fac1 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsAdvertiser.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsAdvertiser.java
@@ -16,14 +16,401 @@
 
 package com.android.server.connectivity.mdns;
 
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.net.LinkAddress;
+import android.net.Network;
+import android.net.nsd.NsdManager;
+import android.net.nsd.NsdServiceInfo;
+import android.os.Looper;
+import android.util.ArrayMap;
 import android.util.Log;
+import android.util.SparseArray;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Predicate;
 
 /**
  * MdnsAdvertiser manages advertising services per {@link com.android.server.NsdService} requests.
  *
- * TODO: implement
+ * All methods except the constructor must be called on the looper thread.
  */
 public class MdnsAdvertiser {
     private static final String TAG = MdnsAdvertiser.class.getSimpleName();
-    public static final boolean DBG = Log.isLoggable(TAG, Log.DEBUG);
+    static final boolean DBG = Log.isLoggable(TAG, Log.DEBUG);
+
+    private final Looper mLooper;
+    private final AdvertiserCallback mCb;
+
+    // Max-sized buffers to be used as temporary buffer to read/build packets. May be used by
+    // multiple components, but only for self-contained operations in the looper thread, so not
+    // concurrently.
+    // TODO: set according to MTU. 1300 should fit for ethernet MTU 1500 with some overhead.
+    private final byte[] mPacketCreationBuffer = new byte[1300];
+
+    private final MdnsSocketProvider mSocketProvider;
+    private final ArrayMap<Network, InterfaceAdvertiserRequest> mAdvertiserRequests =
+            new ArrayMap<>();
+    private final ArrayMap<MdnsInterfaceSocket, MdnsInterfaceAdvertiser> mAllAdvertisers =
+            new ArrayMap<>();
+    private final SparseArray<Registration> mRegistrations = new SparseArray<>();
+    private final Dependencies mDeps;
+
+    /**
+     * Dependencies for {@link MdnsAdvertiser}, useful for testing.
+     */
+    @VisibleForTesting
+    public static class Dependencies {
+        /**
+         * @see MdnsInterfaceAdvertiser
+         */
+        public MdnsInterfaceAdvertiser makeAdvertiser(@NonNull MdnsInterfaceSocket socket,
+                @NonNull List<LinkAddress> initialAddresses,
+                @NonNull Looper looper, @NonNull byte[] packetCreationBuffer,
+                @NonNull MdnsInterfaceAdvertiser.Callback cb) {
+            // Note NetworkInterface is final and not mockable
+            final String logTag = socket.getInterface().getName();
+            return new MdnsInterfaceAdvertiser(logTag, socket, initialAddresses, looper,
+                    packetCreationBuffer, cb);
+        }
+    }
+
+    private final MdnsInterfaceAdvertiser.Callback mInterfaceAdvertiserCb =
+            new MdnsInterfaceAdvertiser.Callback() {
+        @Override
+        public void onRegisterServiceSucceeded(
+                @NonNull MdnsInterfaceAdvertiser advertiser, int serviceId) {
+            // Wait for all current interfaces to be done probing before notifying of success.
+            if (anyAdvertiser(a -> a.isProbing(serviceId))) return;
+            // The service may still be unregistered/renamed if a conflict is found on a later added
+            // interface, or if a conflicting announcement/reply is detected (RFC6762 9.)
+
+            final Registration registration = mRegistrations.get(serviceId);
+            if (registration == null) {
+                Log.wtf(TAG, "Register succeeded for unknown registration");
+                return;
+            }
+            if (!registration.mNotifiedRegistrationSuccess) {
+                mCb.onRegisterServiceSucceeded(serviceId, registration.getServiceInfo());
+                registration.mNotifiedRegistrationSuccess = true;
+            }
+        }
+
+        @Override
+        public void onServiceConflict(@NonNull MdnsInterfaceAdvertiser advertiser, int serviceId) {
+            // TODO: handle conflicts found after registration (during or after probing)
+        }
+
+        @Override
+        public void onDestroyed(@NonNull MdnsInterfaceSocket socket) {
+            for (int i = mAdvertiserRequests.size() - 1; i >= 0; i--) {
+                if (mAdvertiserRequests.valueAt(i).onAdvertiserDestroyed(socket)) {
+                    mAdvertiserRequests.removeAt(i);
+                }
+            }
+            mAllAdvertisers.remove(socket);
+        }
+    };
+
+    /**
+     * A request for a {@link MdnsInterfaceAdvertiser}.
+     *
+     * This class tracks services to be advertised on all sockets provided via a registered
+     * {@link MdnsSocketProvider.SocketCallback}.
+     */
+    private class InterfaceAdvertiserRequest implements MdnsSocketProvider.SocketCallback {
+        /** Registrations to add to newer MdnsInterfaceAdvertisers when sockets are created. */
+        @NonNull
+        private final SparseArray<Registration> mPendingRegistrations = new SparseArray<>();
+        @NonNull
+        private final ArrayMap<MdnsInterfaceSocket, MdnsInterfaceAdvertiser> mAdvertisers =
+                new ArrayMap<>();
+
+        InterfaceAdvertiserRequest(@Nullable Network requestedNetwork) {
+            mSocketProvider.requestSocket(requestedNetwork, this);
+        }
+
+        /**
+         * Called when an advertiser was destroyed, after all services were unregistered and it sent
+         * exit announcements, or the interface is gone.
+         *
+         * @return true if this {@link InterfaceAdvertiserRequest} should now be deleted.
+         */
+        boolean onAdvertiserDestroyed(@NonNull MdnsInterfaceSocket socket) {
+            mAdvertisers.remove(socket);
+            if (mAdvertisers.size() == 0 && mPendingRegistrations.size() == 0) {
+                // No advertiser is using sockets from this request anymore (in particular for exit
+                // announcements), and there is no registration so newer sockets will not be
+                // necessary, so the request can be unregistered.
+                mSocketProvider.unrequestSocket(this);
+                return true;
+            }
+            return false;
+        }
+
+        /**
+         * Get the ID of a conflicting service, or -1 if none.
+         */
+        int getConflictingService(@NonNull NsdServiceInfo info) {
+            for (int i = 0; i < mPendingRegistrations.size(); i++) {
+                final NsdServiceInfo other = mPendingRegistrations.valueAt(i).getServiceInfo();
+                if (info.getServiceName().equals(other.getServiceName())
+                        && info.getServiceType().equals(other.getServiceType())) {
+                    return mPendingRegistrations.keyAt(i);
+                }
+            }
+            return -1;
+        }
+
+        void addService(int id, Registration registration)
+                throws NameConflictException {
+            final int conflicting = getConflictingService(registration.getServiceInfo());
+            if (conflicting >= 0) {
+                throw new NameConflictException(conflicting);
+            }
+
+            mPendingRegistrations.put(id, registration);
+            for (int i = 0; i < mAdvertisers.size(); i++) {
+                mAdvertisers.valueAt(i).addService(id, registration.getServiceInfo());
+            }
+        }
+
+        void removeService(int id) {
+            mPendingRegistrations.remove(id);
+            for (int i = 0; i < mAdvertisers.size(); i++) {
+                mAdvertisers.valueAt(i).removeService(id);
+            }
+        }
+
+        @Override
+        public void onSocketCreated(@NonNull Network network,
+                @NonNull MdnsInterfaceSocket socket,
+                @NonNull List<LinkAddress> addresses) {
+            MdnsInterfaceAdvertiser advertiser = mAllAdvertisers.get(socket);
+            if (advertiser == null) {
+                advertiser = mDeps.makeAdvertiser(socket, addresses, mLooper, mPacketCreationBuffer,
+                        mInterfaceAdvertiserCb);
+                mAllAdvertisers.put(socket, advertiser);
+                advertiser.start();
+            }
+            mAdvertisers.put(socket, advertiser);
+            for (int i = 0; i < mPendingRegistrations.size(); i++) {
+                try {
+                    advertiser.addService(mPendingRegistrations.keyAt(i),
+                            mPendingRegistrations.valueAt(i).getServiceInfo());
+                } catch (NameConflictException e) {
+                    Log.wtf(TAG, "Name conflict adding services that should have unique names", e);
+                }
+            }
+        }
+
+        @Override
+        public void onInterfaceDestroyed(@NonNull Network network,
+                @NonNull MdnsInterfaceSocket socket) {
+            final MdnsInterfaceAdvertiser advertiser = mAdvertisers.get(socket);
+            if (advertiser != null) advertiser.destroyNow();
+        }
+
+        @Override
+        public void onAddressesChanged(@NonNull Network network,
+                @NonNull MdnsInterfaceSocket socket, @NonNull List<LinkAddress> addresses) {
+            final MdnsInterfaceAdvertiser advertiser = mAdvertisers.get(socket);
+            if (advertiser != null) advertiser.updateAddresses(addresses);
+        }
+    }
+
+    private static class Registration {
+        @NonNull
+        final String mOriginalName;
+        boolean mNotifiedRegistrationSuccess;
+        private int mConflictCount;
+        @NonNull
+        private NsdServiceInfo mServiceInfo;
+
+        private Registration(@NonNull NsdServiceInfo serviceInfo) {
+            this.mOriginalName = serviceInfo.getServiceName();
+            this.mServiceInfo = serviceInfo;
+        }
+
+        /**
+         * Update the registration to use a different service name, after a conflict was found.
+         *
+         * If a name conflict was found during probing or because different advertising requests
+         * used the same name, the registration is attempted again with a new name (here using
+         * a number suffix, (1), (2) etc). Registration success is notified once probing succeeds
+         * with a new name. This matches legacy behavior based on mdnsresponder, and appendix D of
+         * RFC6763.
+         * @return The new service info with the updated name.
+         */
+        @NonNull
+        private NsdServiceInfo updateForConflict() {
+            mConflictCount++;
+            // In case of conflict choose a different service name. After the first conflict use
+            // "Name (2)", then "Name (3)" etc.
+            // TODO: use a hidden method in NsdServiceInfo once MdnsAdvertiser is moved to service-t
+            final NsdServiceInfo newInfo = new NsdServiceInfo();
+            newInfo.setServiceName(mOriginalName + " (" + (mConflictCount + 1) + ")");
+            newInfo.setServiceType(mServiceInfo.getServiceType());
+            for (Map.Entry<String, byte[]> attr : mServiceInfo.getAttributes().entrySet()) {
+                newInfo.setAttribute(attr.getKey(), attr.getValue());
+            }
+            newInfo.setHost(mServiceInfo.getHost());
+            newInfo.setPort(mServiceInfo.getPort());
+            newInfo.setNetwork(mServiceInfo.getNetwork());
+            // interfaceIndex is not set when registering
+
+            mServiceInfo = newInfo;
+            return mServiceInfo;
+        }
+
+        @NonNull
+        public NsdServiceInfo getServiceInfo() {
+            return mServiceInfo;
+        }
+    }
+
+    /**
+     * Callbacks for advertising services.
+     *
+     * Every method is called on the MdnsAdvertiser looper thread.
+     */
+    public interface AdvertiserCallback {
+        /**
+         * Called when a service was successfully registered, after probing.
+         *
+         * @param serviceId ID of the service provided when registering.
+         * @param registeredInfo Registered info, which may be different from the requested info,
+         *                       after probing and possibly choosing alternative service names.
+         */
+        void onRegisterServiceSucceeded(int serviceId, NsdServiceInfo registeredInfo);
+
+        /**
+         * Called when service registration failed.
+         *
+         * @param serviceId ID of the service provided when registering.
+         * @param errorCode One of {@code NsdManager.FAILURE_*}
+         */
+        void onRegisterServiceFailed(int serviceId, int errorCode);
+
+        // Unregistration is notified immediately as success in NsdService so no callback is needed
+        // here.
+    }
+
+    public MdnsAdvertiser(@NonNull Looper looper, @NonNull MdnsSocketProvider socketProvider,
+            @NonNull AdvertiserCallback cb) {
+        this(looper, socketProvider, cb, new Dependencies());
+    }
+
+    @VisibleForTesting
+    MdnsAdvertiser(@NonNull Looper looper, @NonNull MdnsSocketProvider socketProvider,
+            @NonNull AdvertiserCallback cb, @NonNull Dependencies deps) {
+        mLooper = looper;
+        mCb = cb;
+        mSocketProvider = socketProvider;
+        mDeps = deps;
+    }
+
+    private void checkThread() {
+        if (Thread.currentThread() != mLooper.getThread()) {
+            throw new IllegalStateException("This must be called on the looper thread");
+        }
+    }
+
+    /**
+     * Add a service to advertise.
+     * @param id A unique ID for the service.
+     * @param service The service info to advertise.
+     */
+    public void addService(int id, NsdServiceInfo service) {
+        checkThread();
+        if (mRegistrations.get(id) != null) {
+            Log.e(TAG, "Adding duplicate registration for " + service);
+            // TODO (b/264986328): add a more specific error code
+            mCb.onRegisterServiceFailed(id, NsdManager.FAILURE_INTERNAL_ERROR);
+            return;
+        }
+
+        if (DBG) {
+            Log.i(TAG, "Adding service " + service + " with ID " + id);
+        }
+
+        try {
+            final Registration registration = new Registration(service);
+            while (!tryAddRegistration(id, registration)) {
+                registration.updateForConflict();
+            }
+
+            mRegistrations.put(id, registration);
+        } catch (IOException e) {
+            Log.e(TAG, "Error adding service " + service, e);
+            removeService(id);
+            // TODO (b/264986328): add a more specific error code
+            mCb.onRegisterServiceFailed(id, NsdManager.FAILURE_INTERNAL_ERROR);
+        }
+    }
+
+    private boolean tryAddRegistration(int id, @NonNull Registration registration)
+            throws IOException {
+        final NsdServiceInfo serviceInfo = registration.getServiceInfo();
+        final Network network = serviceInfo.getNetwork();
+        try {
+            InterfaceAdvertiserRequest advertiser = mAdvertiserRequests.get(network);
+            if (advertiser == null) {
+                advertiser = new InterfaceAdvertiserRequest(network);
+                mAdvertiserRequests.put(network, advertiser);
+            }
+            advertiser.addService(id, registration);
+        } catch (NameConflictException e) {
+            if (DBG) {
+                Log.i(TAG, "Service name conflicts: " + serviceInfo.getServiceName());
+            }
+            removeService(id);
+            return false;
+        }
+
+        // When adding a service to a specific network, check that it does not conflict with other
+        // registrations advertising on all networks
+        final InterfaceAdvertiserRequest allNetworksAdvertiser = mAdvertiserRequests.get(null);
+        if (network != null && allNetworksAdvertiser != null
+                && allNetworksAdvertiser.getConflictingService(serviceInfo) >= 0) {
+            if (DBG) {
+                Log.i(TAG, "Service conflicts with advertisement on all networks: "
+                        + serviceInfo.getServiceName());
+            }
+            removeService(id);
+            return false;
+        }
+
+        mRegistrations.put(id, registration);
+        return true;
+    }
+
+    /**
+     * Remove a previously added service.
+     * @param id ID used when registering.
+     */
+    public void removeService(int id) {
+        checkThread();
+        if (DBG) {
+            Log.i(TAG, "Removing service with ID " + id);
+        }
+        for (int i = mAdvertiserRequests.size() - 1; i >= 0; i--) {
+            final InterfaceAdvertiserRequest advertiser = mAdvertiserRequests.valueAt(i);
+            advertiser.removeService(id);
+        }
+        mRegistrations.remove(id);
+    }
+
+    private boolean anyAdvertiser(@NonNull Predicate<MdnsInterfaceAdvertiser> predicate) {
+        for (int i = 0; i < mAllAdvertisers.size(); i++) {
+            if (predicate.test(mAllAdvertisers.valueAt(i))) {
+                return true;
+            }
+        }
+        return false;
+    }
 }
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiser.java b/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiser.java
new file mode 100644
index 0000000..644bdad
--- /dev/null
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiser.java
@@ -0,0 +1,175 @@
+/*
+ * 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.
+ */
+
+package com.android.server.connectivity.mdns;
+
+import android.annotation.NonNull;
+import android.net.LinkAddress;
+import android.net.nsd.NsdServiceInfo;
+import android.os.Looper;
+
+import java.util.List;
+
+/**
+ * A class that handles advertising services on a {@link MdnsInterfaceSocket} tied to an interface.
+ */
+public class MdnsInterfaceAdvertiser {
+    private static final boolean DBG = MdnsAdvertiser.DBG;
+    @NonNull
+    private final String mTag;
+    @NonNull
+    private final ProbingCallback mProbingCallback = new ProbingCallback();
+    @NonNull
+    private final AnnouncingCallback mAnnouncingCallback = new AnnouncingCallback();
+    @NonNull
+    private final Callback mCb;
+    @NonNull
+    private final MdnsInterfaceSocket mSocket;
+    @NonNull
+    private final MdnsAnnouncer mAnnouncer;
+    @NonNull
+    private final MdnsProber mProber;
+    @NonNull
+    private final MdnsReplySender mReplySender;
+
+    /**
+     * Callbacks called by {@link MdnsInterfaceAdvertiser} to report status updates.
+     */
+    interface Callback {
+        /**
+         * Called by the advertiser after it successfully registered a service, after probing.
+         */
+        void onRegisterServiceSucceeded(@NonNull MdnsInterfaceAdvertiser advertiser, int serviceId);
+
+        /**
+         * Called by the advertiser when a conflict was found, during or after probing.
+         *
+         * If a conflict is found during probing, the {@link #renameServiceForConflict} must be
+         * called to restart probing and attempt registration with a different name.
+         */
+        void onServiceConflict(@NonNull MdnsInterfaceAdvertiser advertiser, int serviceId);
+
+        /**
+         * Called by the advertiser when it destroyed itself.
+         *
+         * This can happen after a call to {@link #destroyNow()}, or after all services were
+         * unregistered and the advertiser finished sending exit announcements.
+         */
+        void onDestroyed(@NonNull MdnsInterfaceSocket socket);
+    }
+
+    /**
+     * Callbacks from {@link MdnsProber}.
+     */
+    private class ProbingCallback implements
+            MdnsPacketRepeater.PacketRepeaterCallback<MdnsProber.ProbingInfo> {
+        @Override
+        public void onFinished(MdnsProber.ProbingInfo info) {
+            // TODO: probing finished, start announcements
+        }
+    }
+
+    /**
+     * Callbacks from {@link MdnsAnnouncer}.
+     */
+    private class AnnouncingCallback
+            implements MdnsPacketRepeater.PacketRepeaterCallback<MdnsAnnouncer.AnnouncementInfo> {
+        // TODO: implement
+    }
+
+    public MdnsInterfaceAdvertiser(@NonNull String logTag,
+            @NonNull MdnsInterfaceSocket socket, @NonNull List<LinkAddress> initialAddresses,
+            @NonNull Looper looper, @NonNull byte[] packetCreationBuffer, @NonNull Callback cb) {
+        mTag = MdnsInterfaceAdvertiser.class.getSimpleName() + "/" + logTag;
+        mSocket = socket;
+        mCb = cb;
+        mReplySender = new MdnsReplySender(looper, socket, packetCreationBuffer);
+        mAnnouncer = new MdnsAnnouncer(logTag, looper, mReplySender,
+                mAnnouncingCallback);
+        mProber = new MdnsProber(logTag, looper, mReplySender, mProbingCallback);
+    }
+
+    /**
+     * Start the advertiser.
+     *
+     * The advertiser will stop itself when all services are removed and exit announcements sent,
+     * notifying via {@link Callback#onDestroyed}. This can also be triggered manually via
+     * {@link #destroyNow()}.
+     */
+    public void start() {
+        // TODO: implement
+    }
+
+    /**
+     * Start advertising a service.
+     *
+     * @throws NameConflictException There is already a service being advertised with that name.
+     */
+    public void addService(int id, NsdServiceInfo service) throws NameConflictException {
+        // TODO: implement
+    }
+
+    /**
+     * Stop advertising a service.
+     *
+     * This will trigger exit announcements for the service.
+     */
+    public void removeService(int id) {
+        // TODO: implement
+    }
+
+    /**
+     * Update interface addresses used to advertise.
+     *
+     * This causes new address records to be announced.
+     */
+    public void updateAddresses(@NonNull List<LinkAddress> newAddresses) {
+        // TODO: implement
+    }
+
+    /**
+     * Destroy the advertiser immediately, not sending any exit announcement.
+     *
+     * <p>Useful when the underlying network went away. This will trigger an onDestroyed callback.
+     */
+    public void destroyNow() {
+        // TODO: implement
+    }
+
+    /**
+     * Reset a service to the probing state due to a conflict found on the network.
+     */
+    public void restartProbingForConflict(int serviceId) {
+        // TODO: implement
+    }
+
+    /**
+     * Rename a service following a conflict found on the network, and restart probing.
+     */
+    public void renameServiceForConflict(int serviceId, NsdServiceInfo newInfo) {
+        // TODO: implement
+    }
+
+    /**
+     * Indicates whether probing is in progress for the given service on this interface.
+     *
+     * Also returns false if the specified service is not registered.
+     */
+    public boolean isProbing(int serviceId) {
+        // TODO: implement
+        return true;
+    }
+}
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceSocket.java b/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceSocket.java
index 6090415..67c893d 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceSocket.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsInterfaceSocket.java
@@ -154,13 +154,12 @@
     }
 
     /**
-     * Returns the index of the network interface that this socket is bound to. If the interface
-     * cannot be determined, returns -1.
+     * Returns the network interface that this socket is bound to.
      *
      * <p>This method could be used on any thread.
      */
-    public int getInterfaceIndex() {
-        return mNetworkInterface.getIndex();
+    public NetworkInterface getInterface() {
+        return mNetworkInterface;
     }
 
     /*** Returns whether this socket has joined IPv4 group */
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsReplySender.java b/service/mdns/com/android/server/connectivity/mdns/MdnsReplySender.java
index 1fdbc5c..adf6f4d 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsReplySender.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsReplySender.java
@@ -32,14 +32,14 @@
  */
 public class MdnsReplySender {
     @NonNull
-    private final MulticastSocket mSocket;
+    private final MdnsInterfaceSocket mSocket;
     @NonNull
     private final Looper mLooper;
     @NonNull
     private final byte[] mPacketCreationBuffer;
 
     public MdnsReplySender(@NonNull Looper looper,
-            @NonNull MulticastSocket socket, @NonNull byte[] packetCreationBuffer) {
+            @NonNull MdnsInterfaceSocket socket, @NonNull byte[] packetCreationBuffer) {
         mLooper = looper;
         mSocket = socket;
         mPacketCreationBuffer = packetCreationBuffer;
diff --git a/service/mdns/com/android/server/connectivity/mdns/MdnsSocketProvider.java b/service/mdns/com/android/server/connectivity/mdns/MdnsSocketProvider.java
index b8c324e..d3bf060 100644
--- a/service/mdns/com/android/server/connectivity/mdns/MdnsSocketProvider.java
+++ b/service/mdns/com/android/server/connectivity/mdns/MdnsSocketProvider.java
@@ -244,7 +244,7 @@
             // Try to join the group again.
             socketInfo.mSocket.joinGroup(addresses);
 
-            notifyAddressesChanged(network, lp);
+            notifyAddressesChanged(network, socketInfo.mSocket, lp);
         }
     }
 
@@ -355,12 +355,13 @@
         }
     }
 
-    private void notifyAddressesChanged(Network network, LinkProperties lp) {
+    private void notifyAddressesChanged(Network network, MdnsInterfaceSocket socket,
+            LinkProperties lp) {
         for (int i = 0; i < mCallbacksToRequestedNetworks.size(); i++) {
             final Network requestedNetwork = mCallbacksToRequestedNetworks.valueAt(i);
             if (isNetworkMatched(requestedNetwork, network)) {
                 mCallbacksToRequestedNetworks.keyAt(i)
-                        .onAddressesChanged(network, lp.getLinkAddresses());
+                        .onAddressesChanged(network, socket, lp.getLinkAddresses());
             }
         }
     }
@@ -455,6 +456,6 @@
                 @NonNull MdnsInterfaceSocket socket) {}
         /*** Notify the addresses is changed on the network */
         default void onAddressesChanged(@NonNull Network network,
-                @NonNull List<LinkAddress> addresses) {}
+                @NonNull MdnsInterfaceSocket socket, @NonNull List<LinkAddress> addresses) {}
     }
 }
diff --git a/service/mdns/com/android/server/connectivity/mdns/NameConflictException.java b/service/mdns/com/android/server/connectivity/mdns/NameConflictException.java
new file mode 100644
index 0000000..c123d02
--- /dev/null
+++ b/service/mdns/com/android/server/connectivity/mdns/NameConflictException.java
@@ -0,0 +1,30 @@
+/*
+ * 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.
+ */
+
+package com.android.server.connectivity.mdns;
+
+/**
+ * An exception thrown when a service name conflicts with an existing service.
+ */
+public class NameConflictException extends Exception {
+    /**
+     * ID of the existing service that conflicted.
+     */
+    public final int conflictingServiceId;
+    public NameConflictException(int conflictingServiceId) {
+        this.conflictingServiceId = conflictingServiceId;
+    }
+}
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 004b4d2..8107be3 100755
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -4366,6 +4366,9 @@
             mNetworkForNetId.remove(nai.network.getNetId());
         }
         propagateUnderlyingNetworkCapabilities(nai.network);
+        // Update allowed network lists in netd. This should be called after removing nai
+        // from mNetworkAgentInfos.
+        updateProfileAllowedNetworks();
         // Remove all previously satisfied requests.
         for (int i = 0; i < nai.numNetworkRequests(); i++) {
             final NetworkRequest request = nai.requestAt(i);
@@ -4800,6 +4803,7 @@
                 }
             }
         }
+
         nri.mPerUidCounter.decrementCount(nri.mUid);
         mNetworkRequestInfoLogs.log("RELEASE " + nri);
         checkNrisConsistency(nri);
@@ -6166,12 +6170,16 @@
         if (mOemNetworkPreferences.getNetworkPreferences().size() > 0) {
             handleSetOemNetworkPreference(mOemNetworkPreferences, null);
         }
+        if (!mProfileNetworkPreferences.isEmpty()) {
+            updateProfileAllowedNetworks();
+        }
     }
 
     private void onUserRemoved(@NonNull final UserHandle user) {
         // If there was a network preference for this user, remove it.
         handleSetProfileNetworkPreference(
-                List.of(new ProfileNetworkPreferenceInfo(user, null, true)),
+                List.of(new ProfileNetworkPreferenceInfo(user, null, true,
+                        false /* blockingNonEnterprise */)),
                 null /* listener */);
         if (mOemNetworkPreferences.getNetworkPreferences().size() > 0) {
             handleSetOemNetworkPreference(mOemNetworkPreferences, null);
@@ -8688,6 +8696,73 @@
         }
     }
 
+    /**
+     * Collect restricted uid ranges for the given network and UserHandle, these uids
+     * are not restricted for matched enterprise networks but being restricted for non-matched
+     * enterprise networks and non-enterprise networks.
+     */
+    @NonNull
+    private ArraySet<UidRange> getRestrictedUidRangesForEnterpriseBlocking(
+            @NonNull NetworkAgentInfo nai, @NonNull UserHandle user) {
+        final ArraySet<UidRange> restrictedUidRanges = new ArraySet<>();
+        for (final ProfileNetworkPreferenceInfo pref : mProfileNetworkPreferences) {
+            if (!pref.user.equals(user) || !pref.blockingNonEnterprise) continue;
+
+            if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_ENTERPRISE)) {
+                // The NC is built from a `ProfileNetworkPreference` which has only one
+                // enterprise ID, so it's guaranteed to have exactly one.
+                final int prefId = pref.capabilities.getEnterpriseIds()[0];
+                if (nai.networkCapabilities.hasEnterpriseId(prefId)) {
+                    continue;
+                }
+            }
+
+            if (UidRangeUtils.doesRangeSetOverlap(restrictedUidRanges,
+                    pref.capabilities.getUidRanges())) {
+                throw new IllegalArgumentException(
+                        "Overlapping uid range in preference: " + pref);
+            }
+            restrictedUidRanges.addAll(pref.capabilities.getUidRanges());
+        }
+        return restrictedUidRanges;
+    }
+
+    private void updateProfileAllowedNetworks() {
+        ensureRunningOnConnectivityServiceThread();
+        final ArrayList<NativeUidRangeConfig> configs = new ArrayList<>();
+        final List<UserHandle> users = mContext.getSystemService(UserManager.class)
+                        .getUserHandles(true /* excludeDying */);
+        if (users.isEmpty()) {
+            throw new IllegalStateException("No user is available");
+        }
+
+        for (final NetworkAgentInfo nai : mNetworkAgentInfos) {
+            ArraySet<UidRange> allowedUidRanges = new ArraySet<>();
+            for (final UserHandle user : users) {
+                final ArraySet<UidRange> restrictedUidRanges =
+                        getRestrictedUidRangesForEnterpriseBlocking(nai, user);
+                allowedUidRanges.addAll(UidRangeUtils.removeRangeSetFromUidRange(
+                        UidRange.createForUser(user), restrictedUidRanges));
+            }
+
+            final UidRangeParcel[] rangesParcel = toUidRangeStableParcels(allowedUidRanges);
+            configs.add(new NativeUidRangeConfig(
+                    nai.network.netId, rangesParcel, 0 /* subPriority */));
+        }
+
+        // The netd API replaces the previous configs with the current configs.
+        // Thus, for network disconnection or preference removal, no need to
+        // unset previous config. Instead, collecting all currently needed
+        // configs and issue to netd.
+        try {
+            mNetd.setNetworkAllowlist(configs.toArray(new NativeUidRangeConfig[0]));
+        } catch (ServiceSpecificException e) {
+            // Has the interface disappeared since the network was built?
+        } catch (RemoteException e) {
+            // Netd died. This usually causes a runtime restart anyway.
+        }
+    }
+
     private void makeDefaultNetwork(@Nullable final NetworkAgentInfo newDefaultNetwork) {
         try {
             if (null != newDefaultNetwork) {
@@ -9320,6 +9395,7 @@
             networkAgent.setCreated();
             networkAgent.onNetworkCreated();
             updateAllowedUids(networkAgent, null, networkAgent.networkCapabilities);
+            updateProfileAllowedNetworks();
         }
 
         if (!networkAgent.everConnected() && state == NetworkInfo.State.CONNECTED) {
@@ -10856,6 +10932,7 @@
         for (final ProfileNetworkPreference preference : preferences) {
             final NetworkCapabilities nc;
             boolean allowFallback = true;
+            boolean blockingNonEnterprise = false;
             switch (preference.getPreference()) {
                 case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_DEFAULT:
                     nc = null;
@@ -10865,6 +10942,9 @@
                                 "Invalid enterprise identifier in setProfileNetworkPreferences");
                     }
                     break;
+                case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE_BLOCKING:
+                    blockingNonEnterprise = true;
+                    // continue to process the enterprise preference.
                 case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK:
                     allowFallback = false;
                     // continue to process the enterprise preference.
@@ -10898,7 +10978,8 @@
                     throw new IllegalArgumentException(
                             "Invalid preference in setProfileNetworkPreferences");
             }
-            preferenceList.add(new ProfileNetworkPreferenceInfo(profile, nc, allowFallback));
+            preferenceList.add(new ProfileNetworkPreferenceInfo(
+                    profile, nc, allowFallback, blockingNonEnterprise));
             if (hasDefaultPreference && preferenceList.size() > 1) {
                 throw new IllegalArgumentException(
                         "Default profile preference should not be set along with other preference");
@@ -11011,6 +11092,7 @@
         removeDefaultNetworkRequestsForPreference(PREFERENCE_ORDER_PROFILE);
         addPerAppDefaultNetworkRequests(
                 createNrisFromProfileNetworkPreferences(mProfileNetworkPreferences));
+        updateProfileAllowedNetworks();
 
         // Finally, rematch.
         rematchAllNetworksAndRequests();
diff --git a/service/src/com/android/server/connectivity/ProfileNetworkPreferenceInfo.java b/service/src/com/android/server/connectivity/ProfileNetworkPreferenceInfo.java
index 10f3886..7679660 100644
--- a/service/src/com/android/server/connectivity/ProfileNetworkPreferenceInfo.java
+++ b/service/src/com/android/server/connectivity/ProfileNetworkPreferenceInfo.java
@@ -32,13 +32,15 @@
     @Nullable
     public final NetworkCapabilities capabilities;
     public final boolean allowFallback;
+    public final boolean blockingNonEnterprise;
 
     public ProfileNetworkPreferenceInfo(@NonNull final UserHandle user,
             @Nullable final NetworkCapabilities capabilities,
-            final boolean allowFallback) {
+            final boolean allowFallback, final boolean blockingNonEnterprise) {
         this.user = user;
         this.capabilities = null == capabilities ? null : new NetworkCapabilities(capabilities);
         this.allowFallback = allowFallback;
+        this.blockingNonEnterprise = blockingNonEnterprise;
     }
 
     @Override
@@ -57,6 +59,7 @@
         return "[ProfileNetworkPreference user=" + user
                 + " caps=" + capabilities
                 + " allowFallback=" + allowFallback
+                + " blockingNonEnterprise=" + blockingNonEnterprise
                 + "]";
     }
 }
diff --git a/tests/cts/OWNERS b/tests/cts/OWNERS
index 089d06f..8388cb7 100644
--- a/tests/cts/OWNERS
+++ b/tests/cts/OWNERS
@@ -2,6 +2,5 @@
 set noparent
 file:platform/packages/modules/Connectivity:master:/OWNERS_core_networking_xts
 
-# Only temporary ownership to improve ethernet code quality (b/236280707)
-# TODO: remove by 12/31/2022
-per-file net/src/android/net/cts/EthernetManagerTest.kt = prohr@google.com #{LAST_RESORT_SUGGESTION}
+# IPsec
+per-file **IpSec* = benedictwong@google.com, nharold@google.com
diff --git a/tests/unit/java/com/android/server/ConnectivityServiceTest.java b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
index 3d6ee09..ca6a14b 100755
--- a/tests/unit/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
@@ -64,6 +64,7 @@
 import static android.net.ConnectivityManager.FIREWALL_RULE_DENY;
 import static android.net.ConnectivityManager.PROFILE_NETWORK_PREFERENCE_DEFAULT;
 import static android.net.ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE;
+import static android.net.ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE_BLOCKING;
 import static android.net.ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK;
 import static android.net.ConnectivityManager.TYPE_ETHERNET;
 import static android.net.ConnectivityManager.TYPE_MOBILE;
@@ -1058,15 +1059,30 @@
          * @param validated Indicate if network should pretend to be validated.
          */
         public void connect(boolean validated) {
-            connect(validated, true, false /* isStrictMode */);
+            connect(validated, true, false /* privateDnsProbeSent */);
         }
 
         /**
          * Transition this NetworkAgent to CONNECTED state.
+         *
          * @param validated Indicate if network should pretend to be validated.
+         *                  Note that if this is true, this method will mock the NetworkMonitor
+         *                  probes to pretend the network is invalid after it validated once,
+         *                  so that subsequent attempts (with mNetworkMonitor.forceReevaluation)
+         *                  will fail unless setNetworkValid is called again manually.
          * @param hasInternet Indicate if network should pretend to have NET_CAPABILITY_INTERNET.
+         * @param privateDnsProbeSent whether the private DNS probe should be considered to have
+         *                            been sent, assuming |validated| is true.
+         *                            If |validated| is false, |privateDnsProbeSent| is not used.
+         *                            If |validated| is true and |privateDnsProbeSent| is false,
+         *                            the probe has not been sent.
+         *                            If |validated| is true and |privateDnsProbeSent| is true,
+         *                            the probe has been sent and has succeeded. When the NM probes
+         *                            are mocked to be invalid, private DNS is the reason this
+         *                            network is invalid ; see @param |validated|.
          */
-        public void connect(boolean validated, boolean hasInternet, boolean isStrictMode) {
+        public void connect(boolean validated, boolean hasInternet,
+                boolean privateDnsProbeSent) {
             final ConditionVariable validatedCv = new ConditionVariable();
             final ConditionVariable capsChangedCv = new ConditionVariable();
             final NetworkRequest request = new NetworkRequest.Builder()
@@ -1074,7 +1090,7 @@
                     .clearCapabilities()
                     .build();
             if (validated) {
-                setNetworkValid(isStrictMode);
+                setNetworkValid(privateDnsProbeSent);
             }
             final NetworkCallback callback = new NetworkCallback() {
                 public void onCapabilitiesChanged(Network network,
@@ -1099,14 +1115,15 @@
             if (validated) {
                 // Wait for network to validate.
                 waitFor(validatedCv);
-                setNetworkInvalid(isStrictMode);
+                setNetworkInvalid(privateDnsProbeSent);
             }
             mCm.unregisterNetworkCallback(callback);
         }
 
-        public void connectWithCaptivePortal(String redirectUrl, boolean isStrictMode) {
-            setNetworkPortal(redirectUrl, isStrictMode);
-            connect(false, true /* hasInternet */, isStrictMode);
+        public void connectWithCaptivePortal(String redirectUrl,
+                boolean privateDnsProbeSent) {
+            setNetworkPortal(redirectUrl, privateDnsProbeSent);
+            connect(false, true /* hasInternet */, privateDnsProbeSent);
         }
 
         public void connectWithPartialConnectivity() {
@@ -1114,16 +1131,16 @@
             connect(false);
         }
 
-        public void connectWithPartialValidConnectivity(boolean isStrictMode) {
-            setNetworkPartialValid(isStrictMode);
-            connect(false, true /* hasInternet */, isStrictMode);
+        public void connectWithPartialValidConnectivity(boolean privateDnsProbeSent) {
+            setNetworkPartialValid(privateDnsProbeSent);
+            connect(false, true /* hasInternet */, privateDnsProbeSent);
         }
 
-        void setNetworkValid(boolean isStrictMode) {
+        void setNetworkValid(boolean privateDnsProbeSent) {
             mNmValidationResult = NETWORK_VALIDATION_RESULT_VALID;
             mNmValidationRedirectUrl = null;
             int probesSucceeded = NETWORK_VALIDATION_PROBE_DNS | NETWORK_VALIDATION_PROBE_HTTPS;
-            if (isStrictMode) {
+            if (privateDnsProbeSent) {
                 probesSucceeded |= NETWORK_VALIDATION_PROBE_PRIVDNS;
             }
             // The probesCompleted equals to probesSucceeded for the case of valid network, so put
@@ -1131,15 +1148,16 @@
             setProbesStatus(probesSucceeded, probesSucceeded);
         }
 
-        void setNetworkInvalid(boolean isStrictMode) {
+        void setNetworkInvalid(boolean invalidBecauseOfPrivateDns) {
             mNmValidationResult = VALIDATION_RESULT_INVALID;
             mNmValidationRedirectUrl = null;
             int probesCompleted = NETWORK_VALIDATION_PROBE_DNS | NETWORK_VALIDATION_PROBE_HTTPS
                     | NETWORK_VALIDATION_PROBE_HTTP;
             int probesSucceeded = 0;
-            // If the isStrictMode is true, it means the network is invalid when NetworkMonitor
-            // tried to validate the private DNS but failed.
-            if (isStrictMode) {
+            // If |invalidBecauseOfPrivateDns| is true, it means the network is invalid because
+            // NetworkMonitor tried to validate the private DNS but failed. Therefore it
+            // didn't get a chance to try the HTTP probe.
+            if (invalidBecauseOfPrivateDns) {
                 probesCompleted &= ~NETWORK_VALIDATION_PROBE_HTTP;
                 probesSucceeded = probesCompleted;
                 probesCompleted |= NETWORK_VALIDATION_PROBE_PRIVDNS;
@@ -1147,14 +1165,14 @@
             setProbesStatus(probesCompleted, probesSucceeded);
         }
 
-        void setNetworkPortal(String redirectUrl, boolean isStrictMode) {
-            setNetworkInvalid(isStrictMode);
+        void setNetworkPortal(String redirectUrl, boolean privateDnsProbeSent) {
+            setNetworkInvalid(privateDnsProbeSent);
             mNmValidationRedirectUrl = redirectUrl;
             // Suppose the portal is found when NetworkMonitor probes NETWORK_VALIDATION_PROBE_HTTP
             // in the beginning, so the NETWORK_VALIDATION_PROBE_HTTPS hasn't probed yet.
             int probesCompleted = NETWORK_VALIDATION_PROBE_DNS | NETWORK_VALIDATION_PROBE_HTTP;
             int probesSucceeded = VALIDATION_RESULT_INVALID;
-            if (isStrictMode) {
+            if (privateDnsProbeSent) {
                 probesCompleted |= NETWORK_VALIDATION_PROBE_PRIVDNS;
             }
             setProbesStatus(probesCompleted, probesSucceeded);
@@ -1169,7 +1187,7 @@
             setProbesStatus(probesCompleted, probesSucceeded);
         }
 
-        void setNetworkPartialValid(boolean isStrictMode) {
+        void setNetworkPartialValid(boolean privateDnsProbeSent) {
             setNetworkPartial();
             mNmValidationResult |= NETWORK_VALIDATION_RESULT_VALID;
             mNmValidationRedirectUrl = null;
@@ -1178,7 +1196,7 @@
             int probesSucceeded = NETWORK_VALIDATION_PROBE_DNS | NETWORK_VALIDATION_PROBE_HTTP;
             // Assume the partial network cannot pass the private DNS validation as well, so only
             // add NETWORK_VALIDATION_PROBE_DNS in probesCompleted but not probesSucceeded.
-            if (isStrictMode) {
+            if (privateDnsProbeSent) {
                 probesCompleted |= NETWORK_VALIDATION_PROBE_PRIVDNS;
             }
             setProbesStatus(probesCompleted, probesSucceeded);
@@ -1473,8 +1491,9 @@
             registerAgent(false /* isAlwaysMetered */, uids, makeLinkProperties());
         }
 
-        private void connect(boolean validated, boolean hasInternet, boolean isStrictMode) {
-            mMockNetworkAgent.connect(validated, hasInternet, isStrictMode);
+        private void connect(boolean validated, boolean hasInternet,
+                boolean privateDnsProbeSent) {
+            mMockNetworkAgent.connect(validated, hasInternet, privateDnsProbeSent);
         }
 
         private void connect(boolean validated) {
@@ -1491,10 +1510,10 @@
         }
 
         public void establish(LinkProperties lp, int uid, Set<UidRange> ranges, boolean validated,
-                boolean hasInternet, boolean isStrictMode) throws Exception {
+                boolean hasInternet, boolean privateDnsProbeSent) throws Exception {
             setOwnerAndAdminUid(uid);
             registerAgent(false, ranges, lp);
-            connect(validated, hasInternet, isStrictMode);
+            connect(validated, hasInternet, privateDnsProbeSent);
             waitForIdle();
         }
 
@@ -1507,11 +1526,11 @@
             establish(lp, uid, uidRangesForUids(uid), true, true, false);
         }
 
-        public void establishForMyUid(boolean validated, boolean hasInternet, boolean isStrictMode)
-                throws Exception {
+        public void establishForMyUid(boolean validated, boolean hasInternet,
+                boolean privateDnsProbeSent) throws Exception {
             final int uid = Process.myUid();
             establish(makeLinkProperties(), uid, uidRangesForUids(uid), validated, hasInternet,
-                    isStrictMode);
+                    privateDnsProbeSent);
         }
 
         public void establishForMyUid() throws Exception {
@@ -4219,7 +4238,7 @@
 
         // With HTTPS probe disabled, NetworkMonitor should pass the network validation with http
         // probe.
-        mWiFiNetworkAgent.setNetworkPartialValid(false /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkPartialValid(false /* privateDnsProbeSent */);
         // If the user chooses yes to use this partial connectivity wifi, switch the default
         // network to wifi and check if wifi becomes valid or not.
         mCm.setAcceptPartialConnectivity(mWiFiNetworkAgent.getNetwork(), true /* accept */,
@@ -4306,7 +4325,7 @@
         callback.expectCapabilitiesWith(NET_CAPABILITY_PARTIAL_CONNECTIVITY, mWiFiNetworkAgent);
         expectUnvalidationCheckWillNotNotify(mWiFiNetworkAgent);
 
-        mWiFiNetworkAgent.setNetworkValid(false /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkValid(false /* privateDnsProbeSent */);
 
         // Need a trigger point to let NetworkMonitor tell ConnectivityService that the network is
         // validated.
@@ -4324,7 +4343,8 @@
         // NetworkMonitor will immediately (once the HTTPS probe fails...) report the network as
         // valid, because ConnectivityService calls setAcceptPartialConnectivity before it calls
         // notifyNetworkConnected.
-        mWiFiNetworkAgent.connectWithPartialValidConnectivity(false /* isStrictMode */);
+        mWiFiNetworkAgent.connectWithPartialValidConnectivity(
+                false /* privateDnsProbeSent */);
         callback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
         verify(mWiFiNetworkAgent.mNetworkMonitor, times(1)).setAcceptPartialConnectivity();
         callback.expectLosing(mCellNetworkAgent);
@@ -4353,7 +4373,8 @@
         // Expect onAvailable callback of listen for NET_CAPABILITY_CAPTIVE_PORTAL.
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
         String redirectUrl = "http://android.com/path";
-        mWiFiNetworkAgent.connectWithCaptivePortal(redirectUrl, false /* isStrictMode */);
+        mWiFiNetworkAgent.connectWithCaptivePortal(redirectUrl,
+                false /* privateDnsProbeSent */);
         wifiCallback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
         assertEquals(mWiFiNetworkAgent.waitForRedirectUrl(), redirectUrl);
 
@@ -4378,7 +4399,7 @@
                 && !nc.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL));
 
         // Report partial connectivity is accepted.
-        mWiFiNetworkAgent.setNetworkPartialValid(false /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkPartialValid(false /* privateDnsProbeSent */);
         mCm.setAcceptPartialConnectivity(mWiFiNetworkAgent.getNetwork(), true /* accept */,
                 false /* always */);
         waitForIdle();
@@ -4408,7 +4429,8 @@
         // Expect onAvailable callback of listen for NET_CAPABILITY_CAPTIVE_PORTAL.
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
         String firstRedirectUrl = "http://example.com/firstPath";
-        mWiFiNetworkAgent.connectWithCaptivePortal(firstRedirectUrl, false /* isStrictMode */);
+        mWiFiNetworkAgent.connectWithCaptivePortal(firstRedirectUrl,
+                false /* privateDnsProbeSent */);
         captivePortalCallback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
         assertEquals(mWiFiNetworkAgent.waitForRedirectUrl(), firstRedirectUrl);
 
@@ -4421,13 +4443,14 @@
         // Expect onAvailable callback of listen for NET_CAPABILITY_CAPTIVE_PORTAL.
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
         String secondRedirectUrl = "http://example.com/secondPath";
-        mWiFiNetworkAgent.connectWithCaptivePortal(secondRedirectUrl, false /* isStrictMode */);
+        mWiFiNetworkAgent.connectWithCaptivePortal(secondRedirectUrl,
+                false /* privateDnsProbeSent */);
         captivePortalCallback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
         assertEquals(mWiFiNetworkAgent.waitForRedirectUrl(), secondRedirectUrl);
 
         // Make captive portal disappear then revalidate.
         // Expect onLost callback because network no longer provides NET_CAPABILITY_CAPTIVE_PORTAL.
-        mWiFiNetworkAgent.setNetworkValid(false /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkValid(false /* privateDnsProbeSent */);
         mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), true);
         captivePortalCallback.expect(CallbackEntry.LOST, mWiFiNetworkAgent);
 
@@ -4436,7 +4459,7 @@
 
         // Break network connectivity.
         // Expect NET_CAPABILITY_VALIDATED onLost callback.
-        mWiFiNetworkAgent.setNetworkInvalid(false /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkInvalid(false /* invalidBecauseOfPrivateDns */);
         mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
         validatedCallback.expect(CallbackEntry.LOST, mWiFiNetworkAgent);
     }
@@ -4488,7 +4511,8 @@
         mServiceContext.expectNoStartActivityIntent(fastTimeoutMs);
 
         // Turn into a captive portal.
-        mWiFiNetworkAgent.setNetworkPortal("http://example.com", false /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkPortal("http://example.com",
+                false /* privateDnsProbeSent */);
         mCm.reportNetworkConnectivity(wifiNetwork, false);
         captivePortalCallback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
         validatedCallback.expect(CallbackEntry.LOST, mWiFiNetworkAgent);
@@ -4501,7 +4525,7 @@
         startCaptivePortalApp(mWiFiNetworkAgent);
 
         // Report that the captive portal is dismissed, and check that callbacks are fired
-        mWiFiNetworkAgent.setNetworkValid(false /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkValid(false /* privateDnsProbeSent */);
         mWiFiNetworkAgent.mNetworkMonitor.forceReevaluation(Process.myUid());
         validatedCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
         captivePortalCallback.expect(CallbackEntry.LOST, mWiFiNetworkAgent);
@@ -4559,7 +4583,8 @@
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
         String firstRedirectUrl = "http://example.com/firstPath";
 
-        mWiFiNetworkAgent.connectWithCaptivePortal(firstRedirectUrl, false /* isStrictMode */);
+        mWiFiNetworkAgent.connectWithCaptivePortal(firstRedirectUrl,
+                false /* privateDnsProbeSent */);
         mWiFiNetworkAgent.expectDisconnected();
         mWiFiNetworkAgent.expectPreventReconnectReceived();
 
@@ -4578,7 +4603,8 @@
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
         final String redirectUrl = "http://example.com/firstPath";
 
-        mWiFiNetworkAgent.connectWithCaptivePortal(redirectUrl, false /* isStrictMode */);
+        mWiFiNetworkAgent.connectWithCaptivePortal(redirectUrl,
+                false /* privateDnsProbeSent */);
         captivePortalCallback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
 
         final CaptivePortalData testData = new CaptivePortalData.Builder()
@@ -4611,7 +4637,8 @@
 
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
 
-        mWiFiNetworkAgent.connectWithCaptivePortal(TEST_REDIRECT_URL, false /* isStrictMode */);
+        mWiFiNetworkAgent.connectWithCaptivePortal(TEST_REDIRECT_URL,
+                false /* privateDnsProbeSent */);
         captivePortalCallback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
         return captivePortalCallback;
     }
@@ -5812,7 +5839,7 @@
         wifiCallback.assertNoCallback();
 
         // Wifi validates. Cell is no longer needed, because it's outscored.
-        mWiFiNetworkAgent.setNetworkValid(true /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkValid(true /* privateDnsProbeSent */);
         // Have CS reconsider the network (see testPartialConnectivity)
         mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), true);
         wifiNetworkCallback.expectCapabilitiesWith(NET_CAPABILITY_VALIDATED, mWiFiNetworkAgent);
@@ -5820,7 +5847,7 @@
         wifiCallback.assertNoCallback();
 
         // Wifi is no longer validated. Cell is needed again.
-        mWiFiNetworkAgent.setNetworkInvalid(true /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkInvalid(true /* invalidBecauseOfPrivateDns */);
         mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
         wifiNetworkCallback.expectCapabilitiesWithout(NET_CAPABILITY_VALIDATED, mWiFiNetworkAgent);
         cellCallback.expectOnNetworkNeeded(defaultCaps);
@@ -5842,7 +5869,7 @@
         wifiNetworkCallback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
         cellCallback.assertNoCallback();
         wifiCallback.assertNoCallback();
-        mWiFiNetworkAgent.setNetworkValid(true /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkValid(true /* privateDnsProbeSent */);
         mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), true);
         wifiNetworkCallback.expectCapabilitiesWith(NET_CAPABILITY_VALIDATED, mWiFiNetworkAgent);
         cellCallback.expectOnNetworkUnneeded(defaultCaps);
@@ -5850,7 +5877,7 @@
 
         // Wifi loses validation. Because the device doesn't avoid bad wifis, cell is
         // not needed.
-        mWiFiNetworkAgent.setNetworkInvalid(true /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkInvalid(true /* invalidBecauseOfPrivateDns */);
         mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
         wifiNetworkCallback.expectCapabilitiesWithout(NET_CAPABILITY_VALIDATED, mWiFiNetworkAgent);
         cellCallback.assertNoCallback();
@@ -5945,7 +5972,7 @@
         Network wifiNetwork = mWiFiNetworkAgent.getNetwork();
 
         // Fail validation on wifi.
-        mWiFiNetworkAgent.setNetworkInvalid(false /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkInvalid(false /* invalidBecauseOfPrivateDns */);
         mCm.reportNetworkConnectivity(wifiNetwork, false);
         defaultCallback.expectCapabilitiesWithout(NET_CAPABILITY_VALIDATED, mWiFiNetworkAgent);
         validatedWifiCallback.expect(CallbackEntry.LOST, mWiFiNetworkAgent);
@@ -5996,7 +6023,7 @@
         wifiNetwork = mWiFiNetworkAgent.getNetwork();
 
         // Fail validation on wifi and expect the dialog to appear.
-        mWiFiNetworkAgent.setNetworkInvalid(false /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkInvalid(false /* invalidBecauseOfPrivateDns */);
         mCm.reportNetworkConnectivity(wifiNetwork, false);
         defaultCallback.expectCapabilitiesWithout(NET_CAPABILITY_VALIDATED, mWiFiNetworkAgent);
         validatedWifiCallback.expect(CallbackEntry.LOST, mWiFiNetworkAgent);
@@ -7155,7 +7182,7 @@
         mCm.registerNetworkCallback(request, callback);
 
         // Bring up wifi aware network.
-        wifiAware.connect(false, false, false /* isStrictMode */);
+        wifiAware.connect(false, false, false /* privateDnsProbeSent */);
         callback.expectAvailableCallbacksUnvalidated(wifiAware);
 
         assertNull(mCm.getActiveNetworkInfo());
@@ -7733,7 +7760,7 @@
         mWiFiNetworkAgent.connect(false);
         callback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
         // Private DNS resolution failed, checking if the notification will be shown or not.
-        mWiFiNetworkAgent.setNetworkInvalid(true /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkInvalid(true /* invalidBecauseOfPrivateDns */);
         mWiFiNetworkAgent.mNetworkMonitor.forceReevaluation(Process.myUid());
         waitForIdle();
         // If network validation failed, NetworkMonitor will re-evaluate the network.
@@ -7745,14 +7772,14 @@
                 eq(NotificationType.PRIVATE_DNS_BROKEN.eventId), any());
         // If private DNS resolution successful, the PRIVATE_DNS_BROKEN notification shouldn't be
         // shown.
-        mWiFiNetworkAgent.setNetworkValid(true /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkValid(true /* privateDnsProbeSent */);
         mWiFiNetworkAgent.mNetworkMonitor.forceReevaluation(Process.myUid());
         waitForIdle();
         verify(mNotificationManager, timeout(TIMEOUT_MS).times(1)).cancel(anyString(),
                 eq(NotificationType.PRIVATE_DNS_BROKEN.eventId));
         // If private DNS resolution failed again, the PRIVATE_DNS_BROKEN notification should be
         // shown again.
-        mWiFiNetworkAgent.setNetworkInvalid(true /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkInvalid(true /* invalidBecauseOfPrivateDns */);
         mWiFiNetworkAgent.mNetworkMonitor.forceReevaluation(Process.myUid());
         waitForIdle();
         verify(mNotificationManager, timeout(TIMEOUT_MS).times(2)).notify(anyString(),
@@ -8214,7 +8241,7 @@
 
         // Connect a VPN.
         mMockVpn.establishForMyUid(false /* validated */, true /* hasInternet */,
-                false /* isStrictMode */);
+                false /* privateDnsProbeSent */);
         callback.expectAvailableCallbacksUnvalidated(mMockVpn);
 
         // Connect cellular data.
@@ -8370,7 +8397,7 @@
                 NetworkAgentConfigShimImpl.newInstance(mMockVpn.getNetworkAgentConfig())
                         .isVpnValidationRequired(),
                 mMockVpn.getAgent().getNetworkCapabilities()));
-        mMockVpn.getAgent().setNetworkValid(false /* isStrictMode */);
+        mMockVpn.getAgent().setNetworkValid(false /* privateDnsProbeSent */);
 
         mMockVpn.connect(false);
 
@@ -8453,7 +8480,7 @@
         assertEquals(defaultCallback.getLastAvailableNetwork(), mCm.getActiveNetwork());
 
         mMockVpn.establishForMyUid(true /* validated */, false /* hasInternet */,
-                false /* isStrictMode */);
+                false /* privateDnsProbeSent */);
         assertUidRangesUpdatedForMyUid(true);
 
         defaultCallback.assertNoCallback();
@@ -8479,7 +8506,7 @@
         assertEquals(defaultCallback.getLastAvailableNetwork(), mCm.getActiveNetwork());
 
         mMockVpn.establishForMyUid(true /* validated */, true /* hasInternet */,
-                false /* isStrictMode */);
+                false /* privateDnsProbeSent */);
         assertUidRangesUpdatedForMyUid(true);
 
         defaultCallback.expectAvailableThenValidatedCallbacks(mMockVpn);
@@ -8505,7 +8532,7 @@
 
         // Bring up a VPN that has the INTERNET capability, initially unvalidated.
         mMockVpn.establishForMyUid(false /* validated */, true /* hasInternet */,
-                false /* isStrictMode */);
+                false /* privateDnsProbeSent */);
         assertUidRangesUpdatedForMyUid(true);
 
         // Even though the VPN is unvalidated, it becomes the default network for our app.
@@ -8527,7 +8554,7 @@
                 mMockVpn.getAgent().getNetworkCapabilities()));
 
         // Pretend that the VPN network validates.
-        mMockVpn.getAgent().setNetworkValid(false /* isStrictMode */);
+        mMockVpn.getAgent().setNetworkValid(false /* privateDnsProbeSent */);
         mMockVpn.getAgent().mNetworkMonitor.forceReevaluation(Process.myUid());
         // Expect to see the validated capability, but no other changes, because the VPN is already
         // the default network for the app.
@@ -8558,7 +8585,7 @@
         mCellNetworkAgent.connect(true);
 
         mMockVpn.establishForMyUid(true /* validated */, false /* hasInternet */,
-                false /* isStrictMode */);
+                false /* privateDnsProbeSent */);
         assertUidRangesUpdatedForMyUid(true);
 
         vpnNetworkCallback.expectAvailableCallbacks(mMockVpn.getNetwork(),
@@ -8602,7 +8629,7 @@
         vpnNetworkCallback.assertNoCallback();
 
         mMockVpn.establishForMyUid(true /* validated */, false /* hasInternet */,
-                false /* isStrictMode */);
+                false /* privateDnsProbeSent */);
         assertUidRangesUpdatedForMyUid(true);
 
         vpnNetworkCallback.expectAvailableThenValidatedCallbacks(mMockVpn);
@@ -8767,7 +8794,7 @@
         vpnNetworkCallback.assertNoCallback();
 
         mMockVpn.establishForMyUid(true /* validated */, false /* hasInternet */,
-                false /* isStrictMode */);
+                false /* privateDnsProbeSent */);
         assertUidRangesUpdatedForMyUid(true);
 
         vpnNetworkCallback.expectAvailableThenValidatedCallbacks(mMockVpn);
@@ -10402,6 +10429,7 @@
         verify(mMockNetd, times(1)).idletimerRemoveInterface(eq(MOBILE_IFNAME), anyInt(),
                 eq(Integer.toString(TRANSPORT_CELLULAR)));
         verify(mMockNetd).networkDestroy(cellNetId);
+        verify(mMockNetd).setNetworkAllowlist(any());
         verifyNoMoreInteractions(mMockNetd);
         verifyNoMoreInteractions(mClatCoordinator);
         reset(mMockNetd);
@@ -10442,6 +10470,7 @@
         verify(mMockNetd).idletimerRemoveInterface(eq(MOBILE_IFNAME), anyInt(),
                 eq(Integer.toString(TRANSPORT_CELLULAR)));
         verify(mMockNetd).networkDestroy(cellNetId);
+        verify(mMockNetd).setNetworkAllowlist(any());
         verifyNoMoreInteractions(mMockNetd);
         verifyNoMoreInteractions(mClatCoordinator);
 
@@ -12312,7 +12341,8 @@
         b1.expectNoBroadcast(500);
 
         final ExpectedBroadcast b2 = registerPacProxyBroadcast();
-        mMockVpn.connect(true /* validated */, true /* hasInternet */, false /* isStrictMode */);
+        mMockVpn.connect(true /* validated */, true /* hasInternet */,
+                false /* privateDnsProbeSent */);
         waitForIdle();
         assertVpnUidRangesUpdated(true, vpnRanges, VPN_UID);
         // Vpn is connected with proxy, so the proxy broadcast will be sent to inform the apps to
@@ -14810,7 +14840,7 @@
 
         // Make sure changes to the work agent send callbacks to the app in the work profile, but
         // not to the other apps.
-        workAgent.setNetworkValid(true /* isStrictMode */);
+        workAgent.setNetworkValid(true /* privateDnsProbeSent */);
         workAgent.mNetworkMonitor.forceReevaluation(Process.myUid());
         profileDefaultNetworkCallback.expectCapabilitiesThat(workAgent,
                 nc -> nc.hasCapability(NET_CAPABILITY_VALIDATED)
@@ -14923,7 +14953,7 @@
                 workAgent2.getNetwork().netId,
                 uidRangeFor(testHandle, profileNetworkPreference), PREFERENCE_ORDER_PROFILE));
 
-        workAgent2.setNetworkValid(true /* isStrictMode */);
+        workAgent2.setNetworkValid(true /* privateDnsProbeSent */);
         workAgent2.mNetworkMonitor.forceReevaluation(Process.myUid());
         profileDefaultNetworkCallback.expectCapabilitiesThat(workAgent2,
                 nc -> nc.hasCapability(NET_CAPABILITY_ENTERPRISE)
@@ -15752,6 +15782,171 @@
                 PREFERENCE_ORDER_PROFILE));
     }
 
+    @Test
+    public void testProfileNetworkPreferenceBlocking_changePreference() throws Exception {
+        final InOrder inOrder = inOrder(mMockNetd);
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        doReturn(asList(PRIMARY_USER_HANDLE, testHandle))
+                .when(mUserManager).getUserHandles(anyBoolean());
+
+        // Start with 1 default network and 1 enterprise network, both networks should
+        // not be restricted since the blocking preference is not set yet.
+        mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
+        mCellNetworkAgent.connect(true);
+
+        // Verify uid ranges 0~99999, 200000~299999 are all allowed for cellular.
+        final UidRange profileUidRange =
+                UidRange.createForUser(UserHandle.of(TEST_WORK_PROFILE_USER_ID));
+        ArraySet<UidRange> allowedAllUidRanges = new ArraySet<>();
+        allowedAllUidRanges.add(PRIMARY_UIDRANGE);
+        allowedAllUidRanges.add(profileUidRange);
+        final UidRangeParcel[] allowAllUidRangesParcel = toUidRangeStableParcels(
+                allowedAllUidRanges);
+        final NativeUidRangeConfig cellAllAllowedConfig = new NativeUidRangeConfig(
+                mCellNetworkAgent.getNetwork().netId,
+                allowAllUidRangesParcel,
+                0 /* subPriority */);
+        inOrder.verify(mMockNetd).setNetworkAllowlist(
+                new NativeUidRangeConfig[]{cellAllAllowedConfig});
+
+        // Verify the same uid ranges are also applied for enterprise network.
+        final TestNetworkAgentWrapper enterpriseAgent = makeEnterpriseNetworkAgent(
+                NET_ENTERPRISE_ID_1);
+        enterpriseAgent.connect(true);
+        final NativeUidRangeConfig enterpriseAllAllowedConfig = new NativeUidRangeConfig(
+                enterpriseAgent.getNetwork().netId,
+                allowAllUidRangesParcel,
+                0 /* subPriority */);
+        // Network agents are stored in an ArraySet which does not guarantee the order and
+        // making the order of the list undeterministic. Thus, verify this in order insensitive way.
+        final ArgumentCaptor<NativeUidRangeConfig[]> configsCaptor = ArgumentCaptor.forClass(
+                NativeUidRangeConfig[].class);
+        inOrder.verify(mMockNetd).setNetworkAllowlist(configsCaptor.capture());
+        assertContainsAll(List.of(configsCaptor.getValue()),
+                List.of(cellAllAllowedConfig, enterpriseAllAllowedConfig));
+
+        // Setup profile preference which only applies to test app uid on the managed profile.
+        ProfileNetworkPreference.Builder prefBuilder = new ProfileNetworkPreference.Builder();
+        prefBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE_BLOCKING)
+                .setIncludedUids(new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID)})
+                .setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        final TestOnCompleteListener listener = new TestOnCompleteListener();
+        mCm.setProfileNetworkPreferences(testHandle,
+                List.of(prefBuilder.build()),
+                r -> r.run(), listener);
+        listener.expectOnComplete();
+
+        // Verify Netd is called for the preferences changed.
+        // Cell: 0~99999, 200000~TEST_APP_UID-1, TEST_APP_UID+1~299999
+        // Enterprise: 0~99999, 200000~299999
+        final ArraySet<UidRange> excludeAppRanges = new ArraySet<>();
+        excludeAppRanges.add(PRIMARY_UIDRANGE);
+        excludeAppRanges.addAll(UidRangeUtils.removeRangeSetFromUidRange(
+                profileUidRange,
+                new ArraySet(new UidRange[]{
+                        (new UidRange(TEST_WORK_PROFILE_APP_UID, TEST_WORK_PROFILE_APP_UID))})
+        ));
+        final UidRangeParcel[] excludeAppRangesParcel = toUidRangeStableParcels(excludeAppRanges);
+        final NativeUidRangeConfig cellExcludeAppConfig = new NativeUidRangeConfig(
+                mCellNetworkAgent.getNetwork().netId,
+                excludeAppRangesParcel,
+                0 /* subPriority */);
+        inOrder.verify(mMockNetd).setNetworkAllowlist(configsCaptor.capture());
+        assertContainsAll(List.of(configsCaptor.getValue()),
+                List.of(cellExcludeAppConfig, enterpriseAllAllowedConfig));
+
+        // Verify unset by giving all allowed set for all users when the preference got removed.
+        mCm.setProfileNetworkPreference(testHandle, PROFILE_NETWORK_PREFERENCE_ENTERPRISE,
+                r -> r.run(), listener);
+        listener.expectOnComplete();
+        inOrder.verify(mMockNetd).setNetworkAllowlist(configsCaptor.capture());
+        assertContainsAll(List.of(configsCaptor.getValue()),
+                List.of(cellAllAllowedConfig, enterpriseAllAllowedConfig));
+
+        // Verify issuing with cellular set only when a network with enterprise capability
+        // disconnects.
+        enterpriseAgent.disconnect();
+        waitForIdle();
+        inOrder.verify(mMockNetd).setNetworkAllowlist(
+                new NativeUidRangeConfig[]{cellAllAllowedConfig});
+    }
+
+    @Test
+    public void testProfileNetworkPreferenceBlocking_networkChanges() throws Exception {
+        final InOrder inOrder = inOrder(mMockNetd);
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        doReturn(asList(PRIMARY_USER_HANDLE, testHandle))
+                .when(mUserManager).getUserHandles(anyBoolean());
+
+        // Setup profile preference which only applies to test app uid on the managed profile.
+        ProfileNetworkPreference.Builder prefBuilder = new ProfileNetworkPreference.Builder();
+        prefBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE_BLOCKING)
+                .setIncludedUids(new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID)})
+                .setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        final TestOnCompleteListener listener = new TestOnCompleteListener();
+        mCm.setProfileNetworkPreferences(testHandle,
+                List.of(prefBuilder.build()),
+                r -> r.run(), listener);
+        listener.expectOnComplete();
+        inOrder.verify(mMockNetd).setNetworkAllowlist(new NativeUidRangeConfig[]{});
+
+        // Start with 1 default network, which should be restricted since the blocking
+        // preference is already set.
+        mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
+        mCellNetworkAgent.connect(true);
+
+        // Verify cellular network applies to the allow list.
+        // Cell: 0~99999, 200000~TEST_APP_UID-1, TEST_APP_UID+1~299999
+        // Enterprise: 0~99999, 200000~299999
+        final ArraySet<UidRange> excludeAppRanges = new ArraySet<>();
+        final UidRange profileUidRange =
+                UidRange.createForUser(UserHandle.of(TEST_WORK_PROFILE_USER_ID));
+        excludeAppRanges.add(PRIMARY_UIDRANGE);
+        excludeAppRanges.addAll(UidRangeUtils.removeRangeSetFromUidRange(
+                profileUidRange,
+                new ArraySet(new UidRange[]{
+                        (new UidRange(TEST_WORK_PROFILE_APP_UID, TEST_WORK_PROFILE_APP_UID))})
+        ));
+        final UidRangeParcel[] excludeAppRangesParcel = toUidRangeStableParcels(excludeAppRanges);
+        final NativeUidRangeConfig cellExcludeAppConfig = new NativeUidRangeConfig(
+                mCellNetworkAgent.getNetwork().netId,
+                excludeAppRangesParcel,
+                0 /* subPriority */);
+        inOrder.verify(mMockNetd).setNetworkAllowlist(
+                new NativeUidRangeConfig[]{cellExcludeAppConfig});
+
+        // Verify enterprise network is not blocked for test app.
+        final TestNetworkAgentWrapper enterpriseAgent = makeEnterpriseNetworkAgent(
+                NET_ENTERPRISE_ID_1);
+        enterpriseAgent.connect(true);
+        ArraySet<UidRange> allowedAllUidRanges = new ArraySet<>();
+        allowedAllUidRanges.add(PRIMARY_UIDRANGE);
+        allowedAllUidRanges.add(profileUidRange);
+        final UidRangeParcel[] allowAllUidRangesParcel = toUidRangeStableParcels(
+                allowedAllUidRanges);
+        final NativeUidRangeConfig enterpriseAllAllowedConfig = new NativeUidRangeConfig(
+                enterpriseAgent.getNetwork().netId,
+                allowAllUidRangesParcel,
+                0 /* subPriority */);
+        // Network agents are stored in an ArraySet which does not guarantee the order and
+        // making the order of the list undeterministic. Thus, verify this in order insensitive way.
+        final ArgumentCaptor<NativeUidRangeConfig[]> configsCaptor = ArgumentCaptor.forClass(
+                NativeUidRangeConfig[].class);
+        inOrder.verify(mMockNetd).setNetworkAllowlist(configsCaptor.capture());
+        assertContainsAll(List.of(configsCaptor.getValue()),
+                List.of(enterpriseAllAllowedConfig, cellExcludeAppConfig));
+
+        // Verify issuing with cellular set only when enterprise network disconnects.
+        enterpriseAgent.disconnect();
+        waitForIdle();
+        inOrder.verify(mMockNetd).setNetworkAllowlist(
+                new NativeUidRangeConfig[]{cellExcludeAppConfig});
+
+        mCellNetworkAgent.disconnect();
+        waitForIdle();
+        inOrder.verify(mMockNetd).setNetworkAllowlist(new NativeUidRangeConfig[]{});
+    }
+
     /**
      * Make sure wrong preferences for per-profile default networking are rejected.
      */
@@ -15762,7 +15957,7 @@
         ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
                 new ProfileNetworkPreference.Builder();
         profileNetworkPreferenceBuilder.setPreference(
-                PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK + 1);
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE_BLOCKING + 1);
         profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
         assertThrows("Should not be able to set an illegal preference",
                 IllegalArgumentException.class,
@@ -16923,7 +17118,8 @@
                     mWiFiNetworkAgent);
             mDefaultNetworkCallback.expect(CallbackEntry.NETWORK_CAPS_UPDATED,
                     mWiFiNetworkAgent);
-            mWiFiNetworkAgent.setNetworkPortal(TEST_REDIRECT_URL, false /* isStrictMode */);
+            mWiFiNetworkAgent.setNetworkPortal(TEST_REDIRECT_URL,
+                    false /* privateDnsProbeSent */);
             mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
             // Wi-Fi is now detected to have a portal : cell should become the default network.
             mDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
@@ -16933,7 +17129,7 @@
                     mWiFiNetworkAgent);
 
             // Wi-Fi becomes valid again. The default network goes back to Wi-Fi.
-            mWiFiNetworkAgent.setNetworkValid(false /* isStrictMode */);
+            mWiFiNetworkAgent.setNetworkValid(false /* privateDnsProbeSent */);
             mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), true);
             mDefaultNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
             wifiNetworkCallback.expectCapabilitiesWithout(NET_CAPABILITY_CAPTIVE_PORTAL,
@@ -16954,7 +17150,7 @@
                     mWiFiNetworkAgent);
 
             // Wi-Fi becomes valid again. The default network goes back to Wi-Fi.
-            mWiFiNetworkAgent.setNetworkValid(false /* isStrictMode */);
+            mWiFiNetworkAgent.setNetworkValid(false /* privateDnsProbeSent */);
             mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), true);
             mDefaultNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
             wifiNetworkCallback.expectCapabilitiesWithout(NET_CAPABILITY_PARTIAL_CONNECTIVITY,
@@ -16968,7 +17164,7 @@
         mWiFiNetworkAgent.setNetworkCapabilities(wifiNc2, true);
         mDefaultNetworkCallback.expect(CallbackEntry.NETWORK_CAPS_UPDATED,
                 mWiFiNetworkAgent);
-        mWiFiNetworkAgent.setNetworkInvalid(false /* isStrictMode */);
+        mWiFiNetworkAgent.setNetworkInvalid(false /* invalidBecauseOfPrivateDns */);
         mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
 
         if (enabled) {
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsAdvertiserTest.kt b/tests/unit/java/com/android/server/connectivity/mdns/MdnsAdvertiserTest.kt
new file mode 100644
index 0000000..e2babb1
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsAdvertiserTest.kt
@@ -0,0 +1,178 @@
+/*
+ * 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.
+ */
+
+package com.android.server.connectivity.mdns
+
+import android.net.InetAddresses.parseNumericAddress
+import android.net.LinkAddress
+import android.net.Network
+import android.net.nsd.NsdServiceInfo
+import android.os.Build
+import android.os.Handler
+import android.os.HandlerThread
+import com.android.server.connectivity.mdns.MdnsAdvertiser.AdvertiserCallback
+import com.android.server.connectivity.mdns.MdnsSocketProvider.SocketCallback
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
+import com.android.testutils.DevSdkIgnoreRunner
+import com.android.testutils.waitForIdle
+import java.util.Objects
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentCaptor
+import org.mockito.ArgumentMatchers.eq
+import org.mockito.Mockito.any
+import org.mockito.Mockito.anyInt
+import org.mockito.Mockito.argThat
+import org.mockito.Mockito.doReturn
+import org.mockito.Mockito.mock
+import org.mockito.Mockito.never
+import org.mockito.Mockito.verify
+
+private const val SERVICE_ID_1 = 1
+private const val SERVICE_ID_2 = 2
+private const val TIMEOUT_MS = 10_000L
+private val TEST_ADDR = parseNumericAddress("2001:db8::123")
+private val TEST_LINKADDR = LinkAddress(TEST_ADDR, 64 /* prefixLength */)
+private val TEST_NETWORK_1 = mock(Network::class.java)
+private val TEST_NETWORK_2 = mock(Network::class.java)
+
+private val SERVICE_1 = NsdServiceInfo("TestServiceName", "_advertisertest._tcp").apply {
+    port = 12345
+    host = TEST_ADDR
+    network = TEST_NETWORK_1
+}
+
+private val ALL_NETWORKS_SERVICE = NsdServiceInfo("TestServiceName", "_advertisertest._tcp").apply {
+    port = 12345
+    host = TEST_ADDR
+    network = null
+}
+
+@RunWith(DevSdkIgnoreRunner::class)
+@IgnoreUpTo(Build.VERSION_CODES.S_V2)
+class MdnsAdvertiserTest {
+    private val thread = HandlerThread(MdnsAdvertiserTest::class.simpleName)
+    private val handler by lazy { Handler(thread.looper) }
+    private val socketProvider = mock(MdnsSocketProvider::class.java)
+    private val cb = mock(AdvertiserCallback::class.java)
+
+    private val mockSocket1 = mock(MdnsInterfaceSocket::class.java)
+    private val mockSocket2 = mock(MdnsInterfaceSocket::class.java)
+    private val mockInterfaceAdvertiser1 = mock(MdnsInterfaceAdvertiser::class.java)
+    private val mockInterfaceAdvertiser2 = mock(MdnsInterfaceAdvertiser::class.java)
+    private val mockDeps = mock(MdnsAdvertiser.Dependencies::class.java)
+
+    @Before
+    fun setUp() {
+        thread.start()
+        doReturn(mockInterfaceAdvertiser1).`when`(mockDeps).makeAdvertiser(eq(mockSocket1),
+                any(), any(), any(), any())
+        doReturn(mockInterfaceAdvertiser2).`when`(mockDeps).makeAdvertiser(eq(mockSocket2),
+                any(), any(), any(), any())
+        doReturn(true).`when`(mockInterfaceAdvertiser1).isProbing(anyInt())
+        doReturn(true).`when`(mockInterfaceAdvertiser2).isProbing(anyInt())
+    }
+
+    @After
+    fun tearDown() {
+        thread.quitSafely()
+    }
+
+    @Test
+    fun testAddService_OneNetwork() {
+        val advertiser = MdnsAdvertiser(thread.looper, socketProvider, cb, mockDeps)
+        postSync { advertiser.addService(SERVICE_ID_1, SERVICE_1) }
+
+        val socketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
+        verify(socketProvider).requestSocket(eq(TEST_NETWORK_1), socketCbCaptor.capture())
+
+        val socketCb = socketCbCaptor.value
+        postSync { socketCb.onSocketCreated(TEST_NETWORK_1, mockSocket1, listOf(TEST_LINKADDR)) }
+
+        val intAdvCbCaptor = ArgumentCaptor.forClass(MdnsInterfaceAdvertiser.Callback::class.java)
+        verify(mockDeps).makeAdvertiser(eq(mockSocket1),
+                eq(listOf(TEST_LINKADDR)), eq(thread.looper), any(), intAdvCbCaptor.capture())
+
+        doReturn(false).`when`(mockInterfaceAdvertiser1).isProbing(SERVICE_ID_1)
+        postSync { intAdvCbCaptor.value.onRegisterServiceSucceeded(
+                mockInterfaceAdvertiser1, SERVICE_ID_1) }
+        verify(cb).onRegisterServiceSucceeded(eq(SERVICE_ID_1), argThat { it.matches(SERVICE_1) })
+
+        postSync { socketCb.onInterfaceDestroyed(TEST_NETWORK_1, mockSocket1) }
+        verify(mockInterfaceAdvertiser1).destroyNow()
+    }
+
+    @Test
+    fun testAddService_AllNetworks() {
+        val advertiser = MdnsAdvertiser(thread.looper, socketProvider, cb, mockDeps)
+        postSync { advertiser.addService(SERVICE_ID_1, ALL_NETWORKS_SERVICE) }
+
+        val socketCbCaptor = ArgumentCaptor.forClass(SocketCallback::class.java)
+        verify(socketProvider).requestSocket(eq(ALL_NETWORKS_SERVICE.network),
+                socketCbCaptor.capture())
+
+        val socketCb = socketCbCaptor.value
+        postSync { socketCb.onSocketCreated(TEST_NETWORK_1, mockSocket1, listOf(TEST_LINKADDR)) }
+        postSync { socketCb.onSocketCreated(TEST_NETWORK_2, mockSocket2, listOf(TEST_LINKADDR)) }
+
+        val intAdvCbCaptor1 = ArgumentCaptor.forClass(MdnsInterfaceAdvertiser.Callback::class.java)
+        val intAdvCbCaptor2 = ArgumentCaptor.forClass(MdnsInterfaceAdvertiser.Callback::class.java)
+        verify(mockDeps).makeAdvertiser(eq(mockSocket1), eq(listOf(TEST_LINKADDR)),
+                eq(thread.looper), any(), intAdvCbCaptor1.capture())
+        verify(mockDeps).makeAdvertiser(eq(mockSocket2), eq(listOf(TEST_LINKADDR)),
+                eq(thread.looper), any(), intAdvCbCaptor2.capture())
+
+        doReturn(false).`when`(mockInterfaceAdvertiser1).isProbing(SERVICE_ID_1)
+        postSync { intAdvCbCaptor1.value.onRegisterServiceSucceeded(
+                mockInterfaceAdvertiser1, SERVICE_ID_1) }
+
+        // Need both advertisers to finish probing and call onRegisterServiceSucceeded
+        verify(cb, never()).onRegisterServiceSucceeded(anyInt(), any())
+        doReturn(false).`when`(mockInterfaceAdvertiser2).isProbing(SERVICE_ID_1)
+        postSync { intAdvCbCaptor2.value.onRegisterServiceSucceeded(
+                mockInterfaceAdvertiser2, SERVICE_ID_1) }
+        verify(cb).onRegisterServiceSucceeded(eq(SERVICE_ID_1),
+                argThat { it.matches(ALL_NETWORKS_SERVICE) })
+
+        // Unregister the service
+        postSync { advertiser.removeService(SERVICE_ID_1) }
+        verify(mockInterfaceAdvertiser1).removeService(SERVICE_ID_1)
+        verify(mockInterfaceAdvertiser2).removeService(SERVICE_ID_1)
+
+        // Interface advertisers call onDestroyed after sending exit announcements
+        postSync { intAdvCbCaptor1.value.onDestroyed(mockSocket1) }
+        verify(socketProvider, never()).unrequestSocket(any())
+        postSync { intAdvCbCaptor2.value.onDestroyed(mockSocket2) }
+        verify(socketProvider).unrequestSocket(socketCb)
+    }
+
+    private fun postSync(r: () -> Unit) {
+        handler.post(r)
+        handler.waitForIdle(TIMEOUT_MS)
+    }
+}
+
+// NsdServiceInfo does not implement equals; this is useful to use in argument matchers
+private fun NsdServiceInfo.matches(other: NsdServiceInfo): Boolean {
+    return Objects.equals(serviceName, other.serviceName) &&
+            Objects.equals(serviceType, other.serviceType) &&
+            Objects.equals(attributes, other.attributes) &&
+            Objects.equals(host, other.host) &&
+            port == other.port &&
+            Objects.equals(network, other.network)
+}
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsAnnouncerTest.kt b/tests/unit/java/com/android/server/connectivity/mdns/MdnsAnnouncerTest.kt
index e9325d5..2051e0c 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsAnnouncerTest.kt
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsAnnouncerTest.kt
@@ -28,7 +28,6 @@
 import java.net.Inet6Address
 import java.net.InetAddress
 import java.net.InetSocketAddress
-import java.net.MulticastSocket
 import kotlin.test.assertEquals
 import kotlin.test.assertTrue
 import org.junit.After
@@ -55,7 +54,7 @@
 class MdnsAnnouncerTest {
 
     private val thread = HandlerThread(MdnsAnnouncerTest::class.simpleName)
-    private val socket = mock(MulticastSocket::class.java)
+    private val socket = mock(MdnsInterfaceSocket::class.java)
     private val buffer = ByteArray(1500)
 
     @Before
@@ -71,8 +70,7 @@
     private class TestAnnouncementInfo(
         announcedRecords: List<MdnsRecord>,
         additionalRecords: List<MdnsRecord>
-    )
-        : AnnouncementInfo(announcedRecords, additionalRecords, destinationsSupplier) {
+    ) : AnnouncementInfo(announcedRecords, additionalRecords, destinationsSupplier) {
         override fun getDelayMs(nextIndex: Int) =
                 if (nextIndex < FIRST_ANNOUNCES_COUNT) {
                     FIRST_ANNOUNCES_DELAY
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsProberTest.kt b/tests/unit/java/com/android/server/connectivity/mdns/MdnsProberTest.kt
index 419121c..a98a4b2 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsProberTest.kt
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsProberTest.kt
@@ -26,7 +26,6 @@
 import com.android.testutils.DevSdkIgnoreRunner
 import java.net.DatagramPacket
 import java.net.InetSocketAddress
-import java.net.MulticastSocket
 import java.util.concurrent.CompletableFuture
 import java.util.concurrent.TimeUnit
 import kotlin.test.assertEquals
@@ -57,7 +56,7 @@
 @IgnoreUpTo(Build.VERSION_CODES.S_V2)
 class MdnsProberTest {
     private val thread = HandlerThread(MdnsProberTest::class.simpleName)
-    private val socket = mock(MulticastSocket::class.java)
+    private val socket = mock(MdnsInterfaceSocket::class.java)
     @Suppress("UNCHECKED_CAST")
     private val cb = mock(MdnsPacketRepeater.PacketRepeaterCallback::class.java)
         as MdnsPacketRepeater.PacketRepeaterCallback<ProbingInfo>
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java b/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java
index 2bb61a6a..ef73030 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsSocketProviderTest.java
@@ -159,7 +159,8 @@
         }
 
         @Override
-        public void onAddressesChanged(Network network, List<LinkAddress> addresses) {
+        public void onAddressesChanged(Network network, MdnsInterfaceSocket socket,
+                List<LinkAddress> addresses) {
             mHistory.add(new AddressesChangedEvent(network, addresses));
         }
 
diff --git a/tools/gn2bp/Android.bp.swp b/tools/gn2bp/Android.bp.swp
index 708c9fd..804c2a4 100644
--- a/tools/gn2bp/Android.bp.swp
+++ b/tools/gn2bp/Android.bp.swp
@@ -35,7 +35,6 @@
         "components/cronet/android/api/src/org/chromium/net/CallbackException.java",
         "components/cronet/android/api/src/org/chromium/net/CronetEngine.java",
         "components/cronet/android/api/src/org/chromium/net/CronetException.java",
-        "components/cronet/android/api/src/org/chromium/net/CronetProvider.java",
         "components/cronet/android/api/src/org/chromium/net/ExperimentalBidirectionalStream.java",
         "components/cronet/android/api/src/org/chromium/net/ExperimentalCronetEngine.java",
         "components/cronet/android/api/src/org/chromium/net/ExperimentalUrlRequest.java",
@@ -383,7 +382,9 @@
          "--input_file " +
          "java/lang/Runtime.class " +
          "--javap " +
-         "$$(find out/.path -name javap)",
+         "$$(find out/.path -name javap) " +
+         "--package_prefix " +
+         "android.net.http.internal",
     out: [
         "base/android_runtime_jni_headers/Runnable_jni.h",
         "base/android_runtime_jni_headers/Runtime_jni.h",
@@ -1275,7 +1276,9 @@
          "--input_file " +
          "$(location base/android/java/src/org/chromium/base/task/PostTask.java) " +
          "--input_file " +
-         "$(location base/android/java/src/org/chromium/base/task/TaskRunnerImpl.java)",
+         "$(location base/android/java/src/org/chromium/base/task/TaskRunnerImpl.java) " +
+         "--package_prefix " +
+         "android.net.http.internal",
     out: [
         "base/base_jni_headers/ApkAssets_jni.h",
         "base/base_jni_headers/ApplicationStatus_jni.h",
@@ -2507,7 +2510,9 @@
          "--input_file " +
          "$(location components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequest.java) " +
          "--input_file " +
-         "$(location components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java)",
+         "$(location components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java) " +
+         "--package_prefix " +
+         "android.net.http.internal",
     out: [
         "components/cronet/android/cronet_jni_headers/CronetBidirectionalStream_jni.h",
         "components/cronet/android/cronet_jni_headers/CronetLibraryLoader_jni.h",
@@ -2714,16 +2719,9 @@
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUploadDataStream.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequest.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/InputStreamChannel.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaCronetEngine.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaCronetEngineBuilderImpl.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaCronetProvider.java",
         "components/cronet/android/java/src/org/chromium/net/impl/JavaUploadDataSinkBase.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaUrlRequest.java",
         "components/cronet/android/java/src/org/chromium/net/impl/JavaUrlRequestUtils.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetEngineBuilderImpl.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetEngineBuilderWithLibraryLoaderImpl.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetProvider.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NetworkExceptionImpl.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NoOpLogger.java",
         "components/cronet/android/java/src/org/chromium/net/impl/Preconditions.java",
@@ -2783,6 +2781,8 @@
          "--header-path " +
          "$(genDir)/components/cronet/android/cronet_jni_registration.h " +
          "--manual_jni_registration " +
+         "--package_prefix " +
+         "android.net.http.internal " +
          ";sed -i -e 's/OUT_SOONG_.TEMP_SBOX_.*_OUT/GEN/g'  " +
          "$(genDir)/components/cronet/android/cronet_jni_registration.h",
     out: [
@@ -2988,16 +2988,9 @@
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUploadDataStream.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequest.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/InputStreamChannel.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaCronetEngine.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaCronetEngineBuilderImpl.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaCronetProvider.java",
         "components/cronet/android/java/src/org/chromium/net/impl/JavaUploadDataSinkBase.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaUrlRequest.java",
         "components/cronet/android/java/src/org/chromium/net/impl/JavaUrlRequestUtils.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetEngineBuilderImpl.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetEngineBuilderWithLibraryLoaderImpl.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetProvider.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NetworkExceptionImpl.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NoOpLogger.java",
         "components/cronet/android/java/src/org/chromium/net/impl/Preconditions.java",
@@ -3057,6 +3050,8 @@
          "--header-path " +
          "$(genDir)/components/cronet/android/cronet_jni_registration.h " +
          "--manual_jni_registration " +
+         "--package_prefix " +
+         "android.net.http.internal " +
          ";sed -i -e 's/OUT_SOONG_.TEMP_SBOX_.*_OUT/GEN/g'  " +
          "$(genDir)/components/cronet/android/cronet_jni_registration.h",
     out: [
@@ -3895,7 +3890,9 @@
          "--output_name " +
          "PrefService_jni.h " +
          "--input_file " +
-         "$(location components/prefs/android/java/src/org/chromium/components/prefs/PrefService.java)",
+         "$(location components/prefs/android/java/src/org/chromium/components/prefs/PrefService.java) " +
+         "--package_prefix " +
+         "android.net.http.internal",
     out: [
         "components/prefs/android/jni_headers/PrefService_jni.h",
     ],
@@ -4368,16 +4365,9 @@
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUploadDataStream.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequest.java",
         "components/cronet/android/java/src/org/chromium/net/impl/CronetUrlRequestContext.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/InputStreamChannel.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaCronetEngine.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaCronetEngineBuilderImpl.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaCronetProvider.java",
         "components/cronet/android/java/src/org/chromium/net/impl/JavaUploadDataSinkBase.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/JavaUrlRequest.java",
         "components/cronet/android/java/src/org/chromium/net/impl/JavaUrlRequestUtils.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetEngineBuilderImpl.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetEngineBuilderWithLibraryLoaderImpl.java",
-        "components/cronet/android/java/src/org/chromium/net/impl/NativeCronetProvider.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NetworkExceptionImpl.java",
         "components/cronet/android/java/src/org/chromium/net/impl/NoOpLogger.java",
         "components/cronet/android/java/src/org/chromium/net/impl/Preconditions.java",
@@ -4421,8 +4411,10 @@
         "net/android/java/src/org/chromium/net/X509Util.java",
         "url/android/java/src/org/chromium/url/IDNStringUtil.java",
     ],
+    static_libs: [
+        "modules-utils-build_system",
+    ],
     apex_available: [
-        "//apex_available:platform",
         "com.android.tethering",
     ],
     libs: [
@@ -4453,6 +4445,7 @@
     sdk_version: "module_current",
     javacflags: [
         "-Aorg.chromium.chrome.skipGenJni",
+        "-Apackage_prefix=android.net.http.internal",
     ],
 }
 
@@ -4666,32 +4659,6 @@
     ],
 }
 
-// GN: //net/data/ssl/chrome_root_store:gen_root_store_inc
-cc_genrule {
-    name: "cronet_aml_net_data_ssl_chrome_root_store_gen_root_store_inc",
-    cmd: "$(location build/gn_run_binary.py) clang_x64/root_store_tool " +
-         "--root-store " +
-         "../../net/data/ssl/chrome_root_store/root_store.textproto " +
-         "--certs " +
-         "../../net/data/ssl/chrome_root_store/root_store.certs " +
-         "--write-cpp-root-store " +
-         "gen/net/data/ssl/chrome_root_store/chrome-root-store-inc.cc " +
-         "--write-cpp-ev-roots " +
-         "gen/net/data/ssl/chrome_root_store/chrome-ev-roots-inc.cc",
-    out: [
-        "net/data/ssl/chrome_root_store/chrome-ev-roots-inc.cc",
-        "net/data/ssl/chrome_root_store/chrome-root-store-inc.cc",
-    ],
-    tool_files: [
-        "build/gn_run_binary.py",
-        "net/data/ssl/chrome_root_store/root_store.certs",
-        "net/data/ssl/chrome_root_store/root_store.textproto",
-    ],
-    apex_available: [
-        "com.android.tethering",
-    ],
-}
-
 // GN: //net/dns:dns
 cc_object {
     name: "cronet_aml_net_dns_dns",
@@ -5884,7 +5851,9 @@
          "--input_file " +
          "$(location net/android/java/src/org/chromium/net/ProxyChangeListener.java) " +
          "--input_file " +
-         "$(location net/android/java/src/org/chromium/net/X509Util.java)",
+         "$(location net/android/java/src/org/chromium/net/X509Util.java) " +
+         "--package_prefix " +
+         "android.net.http.internal",
     out: [
         "net/net_jni_headers/AndroidCertVerifyResult_jni.h",
         "net/net_jni_headers/AndroidKeyStore_jni.h",
@@ -10886,7 +10855,9 @@
          "--input_file " +
          "$(location url/android/java/src/org/chromium/url/IDNStringUtil.java) " +
          "--input_file " +
-         "$(location url/android/java/src/org/chromium/url/Origin.java)",
+         "$(location url/android/java/src/org/chromium/url/Origin.java) " +
+         "--package_prefix " +
+         "android.net.http.internal",
     out: [
         "url/url_jni_headers/IDNStringUtil_jni.h",
         "url/url_jni_headers/Origin_jni.h",
diff --git a/tools/gn2bp/desc_arm.json b/tools/gn2bp/desc_arm.json
index d3e9ecd..dcfcd63 100644
--- a/tools/gn2bp/desc_arm.json
+++ b/tools/gn2bp/desc_arm.json
Binary files differ
diff --git a/tools/gn2bp/desc_arm64.json b/tools/gn2bp/desc_arm64.json
index 980a7a1..6a26578 100644
--- a/tools/gn2bp/desc_arm64.json
+++ b/tools/gn2bp/desc_arm64.json
Binary files differ
diff --git a/tools/gn2bp/desc_x64.json b/tools/gn2bp/desc_x64.json
index d0d9954..f69f50f 100644
--- a/tools/gn2bp/desc_x64.json
+++ b/tools/gn2bp/desc_x64.json
Binary files differ
diff --git a/tools/gn2bp/desc_x86.json b/tools/gn2bp/desc_x86.json
index 6d02af7..4f30229 100644
--- a/tools/gn2bp/desc_x86.json
+++ b/tools/gn2bp/desc_x86.json
Binary files differ
diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index c750c2a..27c3b11 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -190,6 +190,8 @@
 builtin_deps = {
     '//buildtools/third_party/libunwind:libunwind':
         lambda m, a: None, # disable libunwind
+    '//net/data/ssl/chrome_root_store:gen_root_store_inc':
+        lambda m, a: None,
     '//net/tools/root_store_tool:root_store_tool':
         lambda m, a: None,
     '//third_party/zlib:zlib':
@@ -960,6 +962,7 @@
     self._delete_value_arg('--prev_output_dir', False)
     self._update_list_arg('--input_file', self._sanitize_filepath)
     self._update_list_arg('--input_file', self._add_location_tag_to_filepath)
+    self._append_arg('--package_prefix', 'android.net.http.internal')
     super()._sanitize_args()
 
   def _sanitize_outputs(self):
@@ -990,6 +993,7 @@
     # update_jni_registration_module removes them from the srcs of the module
     # It might be better to remove sources by '--sources-exclusions'
     self._delete_value_arg('--sources-exclusions')
+    self._append_arg('--package_prefix', 'android.net.http.internal')
     super()._sanitize_args()
 
   def get_cmd(self):
@@ -1245,8 +1249,7 @@
   # aosp / soong builds and b) the include directory should already be
   # configured via library dependency.
   module.local_include_dirs.update([gn_utils.label_to_path(d)
-                                 for d in include_dirs
-                                 if not re.match('^//out/.*', d)])
+                                 for d in include_dirs if not d.startswith('//out')])
   # Remove prohibited include directories
   module.local_include_dirs = [d for d in module.local_include_dirs
                                if d not in local_include_dirs_denylist]
@@ -1308,17 +1311,13 @@
 
   blueprint.add_module(module)
   module.init_rc = target_initrc.get(target.name, [])
-  module.srcs.update(
-      gn_utils.label_to_path(src)
-      for src in target.sources
-      if is_supported_source_file(src) and not src.startswith("//out/test"))
+  module.srcs.update(gn_utils.label_to_path(src)
+                     for src in target.sources if is_supported_source_file(src))
 
   # Add arch-specific properties
   for arch_name, arch in target.arch.items():
-    module.target[arch_name].srcs.update(
-      gn_utils.label_to_path(src)
-      for src in arch.sources
-      if is_supported_source_file(src) and not src.startswith("//out/test"))
+    module.target[arch_name].srcs.update(gn_utils.label_to_path(src)
+                                         for src in arch.sources if is_supported_source_file(src))
 
   module.rtti = target.rtti
 
@@ -1527,6 +1526,9 @@
     "framework-wifi.stubs.module_lib",
     "framework-mediaprovider.stubs.module_lib",
   }
+  module.static_libs = {
+    "modules-utils-build_system",
+  }
   module.aidl["include_dirs"] = {"frameworks/base/core/java/"}
   module.aidl["local_include_dirs"] = {"base/android/java/src/"}
   module.sdk_version = "module_current"
@@ -1537,8 +1539,7 @@
   # would be less likely to conflict with upstream changes if the revert is not
   # accepted.
   module.javacflags.add("-Aorg.chromium.chrome.skipGenJni")
-  # TODO: remove following workaround required to make this module visible to make (b/203203405)
-  module.apex_available.add("//apex_available:platform")
+  module.javacflags.add("-Apackage_prefix=android.net.http.internal")
   for dep in get_non_api_java_actions(gn):
     target = gn.get_target(dep)
     if target.script == '//build/android/gyp/gcc_preprocess.py':
diff --git a/tools/gn2bp/gen_desc_json.sh b/tools/gn2bp/gen_desc_json.sh
new file mode 100755
index 0000000..510b967
--- /dev/null
+++ b/tools/gn2bp/gen_desc_json.sh
@@ -0,0 +1,54 @@
+#!/bin/bash
+set -x
+
+# Run this script inside a full chromium checkout.
+# TODO: add support for applying local patches.
+
+OUT_PATH="out/cronet"
+
+#######################################
+# Generate desc.json for a specified architecture.
+# Globals:
+#   OUT_PATH
+# Arguments:
+#   target_cpu, string
+#######################################
+function gn_desc() {
+  local -a gn_args=(
+    "target_os = \"android\""
+    "enable_websockets = false"
+    "disable_file_support = true"
+    "disable_brotli_filter = false"
+    "is_component_build = false"
+    "use_crash_key_stubs = true"
+    "use_partition_alloc = false"
+    "include_transport_security_state_preload_list = false"
+    "use_platform_icu_alternatives = true"
+    "default_min_sdk_version = 19"
+    "use_errorprone_java_compiler = true"
+    "enable_reporting = true"
+    "use_hashed_jni_names = true"
+    "treat_warnings_as_errors = false"
+    "enable_base_tracing = false"
+  )
+  gn_args+=("target_cpu = \"${1}\"")
+
+  # Only set arm_use_neon on arm architectures to prevent warning from being
+  # written to json output.
+  if [[ "$1" =~ ^arm ]]; then
+    gn_args+=("arm_use_neon = false")
+  fi
+
+  # Configure gn args.
+  gn gen "${OUT_PATH}" --args="${gn_args[*]}"
+
+  # Generate desc.json.
+  local -r out_file="desc_${1}.json"
+  gn desc "${OUT_PATH}" --format=json --all-toolchains "//*" > "${out_file}"
+}
+
+gn_desc x86
+gn_desc x64
+gn_desc arm
+gn_desc arm64
+
diff --git a/tools/gn2bp/gn_utils.py b/tools/gn2bp/gn_utils.py
index e5d2bf4..3d709e5 100644
--- a/tools/gn2bp/gn_utils.py
+++ b/tools/gn2bp/gn_utils.py
@@ -78,7 +78,7 @@
   return name
 
 def _is_java_source(src):
-  return os.path.splitext(src)[1] == '.java' and not src.startswith("//out/test/gen/")
+  return os.path.splitext(src)[1] == '.java' and not src.startswith("//out/")
 
 def is_java_action(script, outputs):
   return (script != "" and script not in JAVA_BANNED_SCRIPTS) and any(