diff --git a/core/java/android/net/NetworkCapabilities.java b/core/java/android/net/NetworkCapabilities.java
index 785b040..fd37b8c 100644
--- a/core/java/android/net/NetworkCapabilities.java
+++ b/core/java/android/net/NetworkCapabilities.java
@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.IntDef;
+import android.annotation.SystemApi;
 import android.net.ConnectivityManager.NetworkCallback;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -69,6 +70,7 @@
             mSignalStrength = nc.mSignalStrength;
             mUids = nc.mUids;
             mEstablishingVpnAppUid = nc.mEstablishingVpnAppUid;
+            mUnwantedNetworkCapabilities = nc.mUnwantedNetworkCapabilities;
         }
     }
 
@@ -78,7 +80,7 @@
      * @hide
      */
     public void clearAll() {
-        mNetworkCapabilities = mTransportTypes = 0;
+        mNetworkCapabilities = mTransportTypes = mUnwantedNetworkCapabilities = 0;
         mLinkUpBandwidthKbps = mLinkDownBandwidthKbps = LINK_BANDWIDTH_UNSPECIFIED;
         mNetworkSpecifier = null;
         mSignalStrength = SIGNAL_STRENGTH_UNSPECIFIED;
@@ -92,6 +94,11 @@
      */
     private long mNetworkCapabilities;
 
+    /**
+     * If any capabilities specified here they must not exist in the matching Network.
+     */
+    private long mUnwantedNetworkCapabilities;
+
     /** @hide */
     @Retention(RetentionPolicy.SOURCE)
     @IntDef(prefix = { "NET_CAPABILITY_" }, value = {
@@ -339,31 +346,55 @@
      * Adds the given capability to this {@code NetworkCapability} instance.
      * Multiple capabilities may be applied sequentially.  Note that when searching
      * for a network to satisfy a request, all capabilities requested must be satisfied.
+     * <p>
+     * If the given capability was previously added to the list of unwanted capabilities
+     * then the capability will also be removed from the list of unwanted capabilities.
      *
      * @param capability the capability to be added.
      * @return This NetworkCapabilities instance, to facilitate chaining.
      * @hide
      */
     public NetworkCapabilities addCapability(@NetCapability int capability) {
-        if (capability < MIN_NET_CAPABILITY || capability > MAX_NET_CAPABILITY) {
-            throw new IllegalArgumentException("NetworkCapability out of range");
-        }
+        checkValidCapability(capability);
         mNetworkCapabilities |= 1 << capability;
+        mUnwantedNetworkCapabilities &= ~(1 << capability);  // remove from unwanted capability list
         return this;
     }
 
     /**
+     * Adds the given capability to the list of unwanted capabilities of this
+     * {@code NetworkCapability} instance.  Multiple unwanted capabilities may be applied
+     * sequentially.  Note that when searching for a network to satisfy a request, the network
+     * must not contain any capability from unwanted capability list.
+     * <p>
+     * If the capability was previously added to the list of required capabilities (for
+     * example, it was there by default or added using {@link #addCapability(int)} method), then
+     * it will be removed from the list of required capabilities as well.
+     *
+     * @see #addCapability(int)
+     * @hide
+     */
+    public void addUnwantedCapability(@NetCapability int capability) {
+        checkValidCapability(capability);
+        mUnwantedNetworkCapabilities |= 1 << capability;
+        mNetworkCapabilities &= ~(1 << capability);  // remove from requested capabilities
+    }
+
+    /**
      * Removes (if found) the given capability from this {@code NetworkCapability} instance.
+     * <p>
+     * Note that this method removes capabilities that was added via {@link #addCapability(int)},
+     * {@link #addUnwantedCapability(int)} or {@link #setCapabilities(int[], int[])} .
      *
      * @param capability the capability to be removed.
      * @return This NetworkCapabilities instance, to facilitate chaining.
      * @hide
      */
     public NetworkCapabilities removeCapability(@NetCapability int capability) {
-        if (capability < MIN_NET_CAPABILITY || capability > MAX_NET_CAPABILITY) {
-            throw new IllegalArgumentException("NetworkCapability out of range");
-        }
-        mNetworkCapabilities &= ~(1 << capability);
+        checkValidCapability(capability);
+        final long mask = ~(1 << capability);
+        mNetworkCapabilities &= mask;
+        mUnwantedNetworkCapabilities &= mask;
         return this;
     }
 
@@ -393,30 +424,57 @@
     }
 
     /**
+     * Gets all the unwanted capabilities set on this {@code NetworkCapability} instance.
+     *
+     * @return an array of unwanted capability values for this instance.
+     * @hide
+     */
+    public @NetCapability int[] getUnwantedCapabilities() {
+        return BitUtils.unpackBits(mUnwantedNetworkCapabilities);
+    }
+
+
+    /**
      * Sets all the capabilities set on this {@code NetworkCapability} instance.
      * This overwrites any existing capabilities.
      *
      * @hide
      */
-    public void setCapabilities(@NetCapability int[] capabilities) {
+    public void setCapabilities(@NetCapability int[] capabilities,
+            @NetCapability int[] unwantedCapabilities) {
         mNetworkCapabilities = BitUtils.packBits(capabilities);
+        mUnwantedNetworkCapabilities = BitUtils.packBits(unwantedCapabilities);
     }
 
     /**
-     * Tests for the presence of a capabilitity on this instance.
+     * @deprecated use {@link #setCapabilities(int[], int[])}
+     * @hide
+     */
+    @Deprecated
+    public void setCapabilities(@NetCapability int[] capabilities) {
+        setCapabilities(capabilities, new int[] {});
+    }
+
+    /**
+     * Tests for the presence of a capability on this instance.
      *
      * @param capability the capabilities to be tested for.
      * @return {@code true} if set on this instance.
      */
     public boolean hasCapability(@NetCapability int capability) {
-        if (capability < MIN_NET_CAPABILITY || capability > MAX_NET_CAPABILITY) {
-            return false;
-        }
-        return ((mNetworkCapabilities & (1 << capability)) != 0);
+        return isValidCapability(capability)
+                && ((mNetworkCapabilities & (1 << capability)) != 0);
+    }
+
+    /** @hide */
+    public boolean hasUnwantedCapability(@NetCapability int capability) {
+        return isValidCapability(capability)
+                && ((mUnwantedNetworkCapabilities & (1 << capability)) != 0);
     }
 
     private void combineNetCapabilities(NetworkCapabilities nc) {
         this.mNetworkCapabilities |= nc.mNetworkCapabilities;
+        this.mUnwantedNetworkCapabilities |= nc.mUnwantedNetworkCapabilities;
     }
 
     /**
@@ -427,7 +485,9 @@
      * @hide
      */
     public String describeFirstNonRequestableCapability() {
-        final long nonRequestable = (mNetworkCapabilities & NON_REQUESTABLE_CAPABILITIES);
+        final long nonRequestable = (mNetworkCapabilities | mUnwantedNetworkCapabilities)
+                & NON_REQUESTABLE_CAPABILITIES;
+
         if (nonRequestable != 0) {
             return capabilityNameOf(BitUtils.unpackBits(nonRequestable)[0]);
         }
@@ -437,21 +497,29 @@
     }
 
     private boolean satisfiedByNetCapabilities(NetworkCapabilities nc, boolean onlyImmutable) {
-        long networkCapabilities = this.mNetworkCapabilities;
+        long requestedCapabilities = mNetworkCapabilities;
+        long requestedUnwantedCapabilities = mUnwantedNetworkCapabilities;
+        long providedCapabilities = nc.mNetworkCapabilities;
+
         if (onlyImmutable) {
-            networkCapabilities = networkCapabilities & ~MUTABLE_CAPABILITIES;
+            requestedCapabilities &= ~MUTABLE_CAPABILITIES;
+            requestedUnwantedCapabilities &= ~MUTABLE_CAPABILITIES;
         }
-        return ((nc.mNetworkCapabilities & networkCapabilities) == networkCapabilities);
+        return ((providedCapabilities & requestedCapabilities) == requestedCapabilities)
+                && ((requestedUnwantedCapabilities & providedCapabilities) == 0);
     }
 
     /** @hide */
     public boolean equalsNetCapabilities(NetworkCapabilities nc) {
-        return (nc.mNetworkCapabilities == this.mNetworkCapabilities);
+        return (nc.mNetworkCapabilities == this.mNetworkCapabilities)
+                && (nc.mUnwantedNetworkCapabilities == this.mUnwantedNetworkCapabilities);
     }
 
     private boolean equalsNetCapabilitiesRequestable(NetworkCapabilities that) {
         return ((this.mNetworkCapabilities & ~NON_REQUESTABLE_CAPABILITIES) ==
-                (that.mNetworkCapabilities & ~NON_REQUESTABLE_CAPABILITIES));
+                (that.mNetworkCapabilities & ~NON_REQUESTABLE_CAPABILITIES))
+                && ((this.mUnwantedNetworkCapabilities & ~NON_REQUESTABLE_CAPABILITIES) ==
+                (that.mUnwantedNetworkCapabilities & ~NON_REQUESTABLE_CAPABILITIES));
     }
 
     /**
@@ -1187,15 +1255,17 @@
 
     @Override
     public int hashCode() {
-        return ((int) (mNetworkCapabilities & 0xFFFFFFFF)
+        return (int) (mNetworkCapabilities & 0xFFFFFFFF)
                 + ((int) (mNetworkCapabilities >> 32) * 3)
-                + ((int) (mTransportTypes & 0xFFFFFFFF) * 5)
-                + ((int) (mTransportTypes >> 32) * 7)
-                + (mLinkUpBandwidthKbps * 11)
-                + (mLinkDownBandwidthKbps * 13)
-                + Objects.hashCode(mNetworkSpecifier) * 17
-                + (mSignalStrength * 19)
-                + Objects.hashCode(mUids) * 23);
+                + ((int) (mUnwantedNetworkCapabilities & 0xFFFFFFFF) * 5)
+                + ((int) (mUnwantedNetworkCapabilities >> 32) * 7)
+                + ((int) (mTransportTypes & 0xFFFFFFFF) * 11)
+                + ((int) (mTransportTypes >> 32) * 13)
+                + (mLinkUpBandwidthKbps * 17)
+                + (mLinkDownBandwidthKbps * 19)
+                + Objects.hashCode(mNetworkSpecifier) * 23
+                + (mSignalStrength * 29)
+                + Objects.hashCode(mUids) * 31;
     }
 
     @Override
@@ -1205,6 +1275,7 @@
     @Override
     public void writeToParcel(Parcel dest, int flags) {
         dest.writeLong(mNetworkCapabilities);
+        dest.writeLong(mUnwantedNetworkCapabilities);
         dest.writeLong(mTransportTypes);
         dest.writeInt(mLinkUpBandwidthKbps);
         dest.writeInt(mLinkDownBandwidthKbps);
@@ -1220,6 +1291,7 @@
                 NetworkCapabilities netCap = new NetworkCapabilities();
 
                 netCap.mNetworkCapabilities = in.readLong();
+                netCap.mUnwantedNetworkCapabilities = in.readLong();
                 netCap.mTransportTypes = in.readLong();
                 netCap.mLinkUpBandwidthKbps = in.readInt();
                 netCap.mLinkDownBandwidthKbps = in.readInt();
@@ -1248,6 +1320,11 @@
             appendStringRepresentationOfBitMaskToStringBuilder(sb, mNetworkCapabilities,
                     NetworkCapabilities::capabilityNameOf, "&");
         }
+        if (0 != mNetworkCapabilities) {
+            sb.append(" Unwanted: ");
+            appendStringRepresentationOfBitMaskToStringBuilder(sb, mUnwantedNetworkCapabilities,
+                    NetworkCapabilities::capabilityNameOf, "&");
+        }
         if (mLinkUpBandwidthKbps > 0) {
             sb.append(" LinkUpBandwidth>=").append(mLinkUpBandwidthKbps).append("Kbps");
         }
@@ -1373,4 +1450,13 @@
         Preconditions.checkArgument(
                 isValidTransport(transport), "Invalid TransportType " + transport);
     }
+
+    private static boolean isValidCapability(@NetworkCapabilities.NetCapability int capability) {
+        return capability >= MIN_NET_CAPABILITY && capability <= MAX_NET_CAPABILITY;
+    }
+
+    private static void checkValidCapability(@NetworkCapabilities.NetCapability int capability) {
+        Preconditions.checkArgument(isValidCapability(capability),
+                "NetworkCapability " + capability + "out of range");
+    }
 }
diff --git a/core/java/android/net/NetworkRequest.java b/core/java/android/net/NetworkRequest.java
index f1dfbd1..96826f8 100644
--- a/core/java/android/net/NetworkRequest.java
+++ b/core/java/android/net/NetworkRequest.java
@@ -164,6 +164,9 @@
          * the requested network's required capabilities.  Note that when searching
          * for a network to satisfy a request, all capabilities requested must be
          * satisfied.
+         * <p>
+         * If the given capability was previously added to the list of unwanted capabilities
+         * then the capability will also be removed from the list of unwanted capabilities.
          *
          * @param capability The capability to add.
          * @return The builder to facilitate chaining
@@ -175,7 +178,8 @@
         }
 
         /**
-         * Removes (if found) the given capability from this builder instance.
+         * Removes (if found) the given capability from this builder instance from both required
+         * and unwanted capabilities lists.
          *
          * @param capability The capability to remove.
          * @return The builder to facilitate chaining.
@@ -200,6 +204,24 @@
         }
 
         /**
+         * Add a capability that must not exist in the requested network.
+         * <p>
+         * If the capability was previously added to the list of required capabilities (for
+         * example, it was there by default or added using {@link #addCapability(int)} method), then
+         * it will be removed from the list of required capabilities as well.
+         *
+         * @see #addCapability(int)
+         *
+         * @param capability The capability to add to unwanted capability list.
+         * @return The builder to facilitate chaining.
+         * @hide
+         */
+        public Builder addUnwantedCapability(@NetworkCapabilities.NetCapability int capability) {
+            mNetworkCapabilities.addUnwantedCapability(capability);
+            return this;
+        }
+
+        /**
          * Completely clears all the {@code NetworkCapabilities} from this builder instance,
          * removing even the capabilities that are set by default when the object is constructed.
          *
diff --git a/tests/net/java/android/net/NetworkCapabilitiesTest.java b/tests/net/java/android/net/NetworkCapabilitiesTest.java
index b32f0fd..caaa610 100644
--- a/tests/net/java/android/net/NetworkCapabilitiesTest.java
+++ b/tests/net/java/android/net/NetworkCapabilitiesTest.java
@@ -17,19 +17,25 @@
 package android.net;
 
 import static android.net.NetworkCapabilities.LINK_BANDWIDTH_UNSPECIFIED;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_CBS;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_DUN;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_EIMS;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_MMS;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_OEM_PAID;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_WIFI_P2P;
 import static android.net.NetworkCapabilities.RESTRICTED_CAPABILITIES;
 import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
 import static android.net.NetworkCapabilities.UNRESTRICTED_CAPABILITIES;
 
+import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotEquals;
@@ -277,6 +283,120 @@
         assertFalse(nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED));
     }
 
+    @Test
+    public void testUnwantedCapabilities() {
+        NetworkCapabilities network = new NetworkCapabilities();
+
+        NetworkCapabilities request = new NetworkCapabilities();
+        assertTrue("Request: " + request + ", Network:" + network,
+                request.satisfiedByNetworkCapabilities(network));
+
+        // Adding capabilities that doesn't exist in the network anyway
+        request.addUnwantedCapability(NET_CAPABILITY_WIFI_P2P);
+        request.addUnwantedCapability(NET_CAPABILITY_NOT_METERED);
+        assertTrue(request.satisfiedByNetworkCapabilities(network));
+        assertArrayEquals(new int[] {NET_CAPABILITY_WIFI_P2P, NET_CAPABILITY_NOT_METERED},
+                request.getUnwantedCapabilities());
+
+        // This is a default capability, just want to make sure its there because we use it below.
+        assertTrue(network.hasCapability(NET_CAPABILITY_NOT_RESTRICTED));
+
+        // Verify that adding unwanted capability will effectively remove it from capability list.
+        request.addUnwantedCapability(NET_CAPABILITY_NOT_RESTRICTED);
+        assertTrue(request.hasUnwantedCapability(NET_CAPABILITY_NOT_RESTRICTED));
+        assertFalse(request.hasCapability(NET_CAPABILITY_NOT_RESTRICTED));
+
+
+        // Now this request won't be satisfied because network contains NOT_RESTRICTED.
+        assertFalse(request.satisfiedByNetworkCapabilities(network));
+        network.removeCapability(NET_CAPABILITY_NOT_RESTRICTED);
+        assertTrue(request.satisfiedByNetworkCapabilities(network));
+
+        // Verify that adding capability will effectively remove it from unwanted list
+        request.addCapability(NET_CAPABILITY_NOT_RESTRICTED);
+        assertTrue(request.hasCapability(NET_CAPABILITY_NOT_RESTRICTED));
+        assertFalse(request.hasUnwantedCapability(NET_CAPABILITY_NOT_RESTRICTED));
+
+        assertFalse(request.satisfiedByNetworkCapabilities(network));
+        network.addCapability(NET_CAPABILITY_NOT_RESTRICTED);
+        assertTrue(request.satisfiedByNetworkCapabilities(network));
+    }
+
+    @Test
+    public void testEqualsNetCapabilities() {
+        int CAPABILITY = NET_CAPABILITY_MMS;  // An arbitrary not mutable capability.
+
+        NetworkCapabilities nc1 = new NetworkCapabilities();
+        NetworkCapabilities nc2 = new NetworkCapabilities();
+        assertTrue(nc1.equalsNetCapabilities(nc2));
+        assertEquals(nc1, nc2);
+
+        nc1.addCapability(CAPABILITY);
+        assertFalse(nc1.equalsNetCapabilities(nc2));
+        assertNotEquals(nc1, nc2);
+        nc2.addCapability(CAPABILITY);
+        assertTrue(nc1.equalsNetCapabilities(nc2));
+        assertEquals(nc1, nc2);
+
+        nc1.addUnwantedCapability(CAPABILITY);
+        assertFalse(nc1.equalsNetCapabilities(nc2));
+        nc2.addUnwantedCapability(CAPABILITY);
+        assertTrue(nc1.equalsNetCapabilities(nc2));
+
+        nc1.removeCapability(CAPABILITY);
+        assertFalse(nc1.equalsNetCapabilities(nc2));
+        nc2.removeCapability(CAPABILITY);
+        assertTrue(nc1.equalsNetCapabilities(nc2));
+    }
+
+    @Test
+    public void testCombineCapabilities() {
+        NetworkCapabilities nc1 = new NetworkCapabilities();
+        NetworkCapabilities nc2 = new NetworkCapabilities();
+
+        nc1.addUnwantedCapability(NET_CAPABILITY_CAPTIVE_PORTAL);
+        nc1.addCapability(NET_CAPABILITY_NOT_ROAMING);
+        assertNotEquals(nc1, nc2);
+        nc2.combineCapabilities(nc1);
+        assertEquals(nc1, nc2);
+        assertTrue(nc2.hasCapability(NET_CAPABILITY_NOT_ROAMING));
+        assertTrue(nc2.hasUnwantedCapability(NET_CAPABILITY_CAPTIVE_PORTAL));
+
+        // This will effectively move NOT_ROAMING capability from required to unwanted for nc1.
+        nc1.addUnwantedCapability(NET_CAPABILITY_NOT_ROAMING);
+
+        nc2.combineCapabilities(nc1);
+        // We will get this capability in both requested and unwanted lists thus this request
+        // will never be satisfied.
+        assertTrue(nc2.hasCapability(NET_CAPABILITY_NOT_ROAMING));
+        assertTrue(nc2.hasUnwantedCapability(NET_CAPABILITY_NOT_ROAMING));
+    }
+
+    @Test
+    public void testSetCapabilities() {
+        final int[] REQUIRED_CAPABILITIES = new int[] {
+                NET_CAPABILITY_INTERNET, NET_CAPABILITY_NOT_VPN };
+        final int[] UNWANTED_CAPABILITIES = new int[] {
+                NET_CAPABILITY_NOT_RESTRICTED, NET_CAPABILITY_NOT_METERED
+        };
+
+        NetworkCapabilities nc1 = new NetworkCapabilities();
+        NetworkCapabilities nc2 = new NetworkCapabilities();
+
+        nc1.setCapabilities(REQUIRED_CAPABILITIES, UNWANTED_CAPABILITIES);
+        assertArrayEquals(REQUIRED_CAPABILITIES, nc1.getCapabilities());
+
+        // Verify that setting and adding capabilities leads to the same object state.
+        nc2.clearAll();
+        for (int cap : REQUIRED_CAPABILITIES) {
+            nc2.addCapability(cap);
+        }
+        for (int cap : UNWANTED_CAPABILITIES) {
+            nc2.addUnwantedCapability(cap);
+        }
+        assertEquals(nc1, nc2);
+    }
+
     private void assertEqualsThroughMarshalling(NetworkCapabilities netCap) {
         Parcel p = Parcel.obtain();
         netCap.writeToParcel(p, /* flags */ 0);