diff --git a/tests/cts/net/Android.mk b/tests/cts/net/Android.mk
index a35e145..6524871 100644
--- a/tests/cts/net/Android.mk
+++ b/tests/cts/net/Android.mk
@@ -26,7 +26,8 @@
 
 LOCAL_JAVA_LIBRARIES := voip-common conscrypt org.apache.http.legacy
 
-LOCAL_JNI_SHARED_LIBRARIES := libcts_jni libnativedns_jni
+LOCAL_JNI_SHARED_LIBRARIES := libcts_jni libnativedns_jni \
+                              libnativemultinetwork_jni
 
 # include CtsTestServer as a temporary hack to free net.cts from cts.stub.
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
diff --git a/tests/cts/net/jni/Android.mk b/tests/cts/net/jni/Android.mk
index 75982de..ca82b30 100644
--- a/tests/cts/net/jni/Android.mk
+++ b/tests/cts/net/jni/Android.mk
@@ -28,3 +28,12 @@
 LOCAL_SHARED_LIBRARIES := libnativehelper liblog
 
 include $(BUILD_SHARED_LIBRARY)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libnativemultinetwork_jni
+# Don't include this package in any configuration by default.
+LOCAL_MODULE_TAGS := optional
+LOCAL_SRC_FILES := NativeMultinetworkJni.c
+LOCAL_C_INCLUDES := $(JNI_H_INCLUDE)
+LOCAL_SHARED_LIBRARIES := libandroid libnativehelper liblog
+include $(BUILD_SHARED_LIBRARY)
diff --git a/tests/cts/net/jni/NativeMultinetworkJni.c b/tests/cts/net/jni/NativeMultinetworkJni.c
new file mode 100644
index 0000000..9a5ab9c
--- /dev/null
+++ b/tests/cts/net/jni/NativeMultinetworkJni.c
@@ -0,0 +1,216 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+
+#define LOG_TAG "MultinetworkApiTest"
+#include <utils/Log.h>
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <jni.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <android/multinetwork.h>
+
+#define UNUSED(X) ((void) X)
+
+static const char kHostname[] = "connectivitycheck.android.com";
+
+
+JNIEXPORT jint Java_android_net_cts_MultinetworkApiTest_runGetaddrinfoCheck(
+        JNIEnv* env, jclass class, jlong nethandle) {
+    UNUSED(env);
+    UNUSED(class);
+    net_handle_t handle = (net_handle_t) nethandle;
+    struct addrinfo *res = NULL;
+
+    errno = 0;
+    int rval = android_getaddrinfofornetwork(handle, kHostname, NULL, NULL, &res);
+    const int saved_errno = errno;
+    freeaddrinfo(res);
+
+    ALOGD("android_getaddrinfofornetwork(%llu, %s) returned rval=%d errno=%d",
+          handle, kHostname, rval, saved_errno);
+    return rval == 0 ? 0 : -saved_errno;
+}
+
+JNIEXPORT jint Java_android_net_cts_MultinetworkApiTest_runSetprocnetwork(
+        JNIEnv* env, jclass class, jlong nethandle) {
+    UNUSED(env);
+    UNUSED(class);
+    net_handle_t handle = (net_handle_t) nethandle;
+
+    errno = 0;
+    int rval = android_setprocnetwork(handle);
+    const int saved_errno = errno;
+    ALOGD("android_setprocnetwork(%llu) returned rval=%d errno=%d",
+          handle, rval, saved_errno);
+    return rval == 0 ? 0 : -saved_errno;
+}
+
+JNIEXPORT jint Java_android_net_cts_MultinetworkApiTest_runSetsocknetwork(
+        JNIEnv* env, jclass class, jlong nethandle) {
+    UNUSED(env);
+    UNUSED(class);
+    net_handle_t handle = (net_handle_t) nethandle;
+
+    errno = 0;
+    int fd = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
+    if (fd < 0) {
+        ALOGD("socket() failed, errno=%d", errno);
+        return -errno;
+    }
+
+    errno = 0;
+    int rval = android_setsocknetwork(handle, fd);
+    const int saved_errno = errno;
+    ALOGD("android_setprocnetwork(%llu, %d) returned rval=%d errno=%d",
+          handle, fd, rval, saved_errno);
+    close(fd);
+    return rval == 0 ? 0 : -saved_errno;
+}
+
+static const int kSockaddrStrLen = INET6_ADDRSTRLEN + strlen("[]:65535");
+
+void sockaddr_ntop(const struct sockaddr *sa, socklen_t salen, char *dst, const size_t size) {
+    char addrstr[INET6_ADDRSTRLEN];
+    char portstr[sizeof("65535")];
+    char buf[sizeof(addrstr) + sizeof(portstr) + sizeof("[]:")];
+    int ret = getnameinfo(sa, salen,
+                          addrstr, sizeof(addrstr),
+                          portstr, sizeof(portstr),
+                          NI_NUMERICHOST | NI_NUMERICSERV);
+    if (ret == 0) {
+        snprintf(buf, sizeof(buf),
+                 (sa->sa_family == AF_INET6) ? "[%s]:%s" : "%s:%s",
+                 addrstr, portstr);
+    } else {
+        sprintf(buf, "???");
+    }
+
+    strlcpy(dst, buf, (strlen(buf) < size - 1) ? strlen(buf) : size - 1);
+}
+
+JNIEXPORT jint Java_android_net_cts_MultinetworkApiTest_runDatagramCheck(
+        JNIEnv* env, jclass class, jlong nethandle) {
+    UNUSED(env);
+    UNUSED(class);
+    const struct addrinfo kHints = {
+        .ai_flags = AI_ADDRCONFIG,
+        .ai_family = AF_UNSPEC,
+        .ai_socktype = SOCK_DGRAM,
+        .ai_protocol = IPPROTO_UDP,
+    };
+    struct addrinfo *res = NULL;
+    net_handle_t handle = (net_handle_t) nethandle;
+
+    // Quoth Ian Swett:
+    //     "QUIC always uses 80 and 443, but only 443 is used for secure(HTTPS) traffic."
+    int rval = android_getaddrinfofornetwork(handle, kHostname, "80", &kHints, &res);
+    if (rval != 0) {
+        ALOGD("android_getaddrinfofornetwork(%llu, %s) returned rval=%d errno=%d",
+              handle, kHostname, rval, errno);
+        freeaddrinfo(res);
+        return -errno;
+    }
+
+    // Rely upon getaddrinfo sorting the best destination to the front.
+    int fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
+    if (fd < 0) {
+        ALOGD("socket(%d, %d, %d) failed, errno=%d",
+              res->ai_family, res->ai_socktype, res->ai_protocol, errno);
+        freeaddrinfo(res);
+        return -errno;
+    }
+
+    rval = android_setsocknetwork(handle, fd);
+    ALOGD("android_setprocnetwork(%llu, %d) returned rval=%d errno=%d",
+          handle, fd, rval, errno);
+    if (rval != 0) {
+        close(fd);
+        freeaddrinfo(res);
+        return -errno;
+    }
+
+    char addrstr[kSockaddrStrLen];
+    sockaddr_ntop(res->ai_addr, res->ai_addrlen, addrstr, sizeof(addrstr));
+    ALOGD("Attempting connect() to %s...", addrstr);
+
+    rval = connect(fd, res->ai_addr, res->ai_addrlen);
+    if (rval != 0) {
+        close(fd);
+        freeaddrinfo(res);
+        return -errno;
+    }
+    freeaddrinfo(res);
+
+    struct sockaddr_storage src_addr;
+    socklen_t src_addrlen = sizeof(src_addr);
+    if (getsockname(fd, (struct sockaddr *)&src_addr, &src_addrlen) != 0) {
+        close(fd);
+        return -errno;
+    }
+    sockaddr_ntop((const struct sockaddr *)&src_addr, sizeof(src_addr), addrstr, sizeof(addrstr));
+    ALOGD("... from %s", addrstr);
+
+    // Don't let reads or writes block indefinitely.
+    const struct timeval timeo = { 5, 0 };  // 5 seconds
+    setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo));
+    setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo));
+
+    uint8_t quic_packet[] = {
+        0x0c,                    // public flags: 64bit conn ID, 8bit sequence number
+        0, 0, 0, 0, 0, 0, 0, 0,  // 64bit connection ID
+        0x01,                    // sequence number
+        0x00,                    // private flags
+        0x07,                    // type: regular frame type "PING"
+    };
+
+    arc4random_buf(quic_packet + 1, 8);  // random connection ID
+
+    ssize_t sent = send(fd, quic_packet, sizeof(quic_packet), 0);
+    if (sent < (ssize_t)sizeof(quic_packet)) {
+        ALOGD("send(QUIC packet) returned sent=%zd, errno=%d", sent, errno);
+        close(fd);
+        return -errno;
+    }
+
+    uint8_t response[1500];
+    ssize_t rcvd = recv(fd, response, sizeof(response), 0);
+    if (rcvd < sent) {
+        ALOGD("recv() returned rcvd=%zd, errno=%d", rcvd, errno);
+        close(fd);
+        return -errno;
+    }
+
+    int conn_id_cmp = memcmp(quic_packet + 1, response + 1, 8);
+    if (conn_id_cmp != 0) {
+        ALOGD("sent and received connection IDs do not match");
+        close(fd);
+        return -EPROTO;
+    }
+
+    // TODO: log, and compare to the IP address encoded in the
+    // response, since this should be a public reset packet.
+
+    close(fd);
+    return 0;
+}
diff --git a/tests/cts/net/src/android/net/cts/MultinetworkApiTest.java b/tests/cts/net/src/android/net/cts/MultinetworkApiTest.java
new file mode 100644
index 0000000..51ee50e
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/MultinetworkApiTest.java
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.net.NetworkUtils;
+import android.system.ErrnoException;
+import android.system.OsConstants;
+import android.test.AndroidTestCase;
+
+import java.util.ArrayList;
+
+
+public class MultinetworkApiTest extends AndroidTestCase {
+
+    static {
+        System.loadLibrary("nativemultinetwork_jni");
+    }
+
+    private static final String TAG = "MultinetworkNativeApiTest";
+
+    /**
+     * @return 0 on success
+     */
+    private static native int runGetaddrinfoCheck(long networkHandle);
+    private static native int runSetprocnetwork(long networkHandle);
+    private static native int runSetsocknetwork(long networkHandle);
+    private static native int runDatagramCheck(long networkHandle);
+
+    private ConnectivityManager mCM;
+
+    protected void setUp() throws Exception {
+        super.setUp();
+        mCM = (ConnectivityManager) getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+    }
+
+    private Network[] getTestableNetworks() {
+        final ArrayList<Network> testableNetworks = new ArrayList<Network>();
+        for (Network network : mCM.getAllNetworks()) {
+            final NetworkCapabilities nc = mCM.getNetworkCapabilities(network);
+            if (nc != null
+                    && nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
+                    && nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)) {
+                testableNetworks.add(network);
+            }
+        }
+
+        assertTrue(
+                "This test requires that at least one network be connected. " +
+                "Please ensure that the device is connected to a network.",
+                testableNetworks.size() >= 1);
+        return testableNetworks.toArray(new Network[0]);
+    }
+
+    public void testGetaddrinfo() throws ErrnoException {
+        for (Network network : getTestableNetworks()) {
+            int errno = runGetaddrinfoCheck(network.getNetworkHandle());
+            if (errno != 0) {
+                throw new ErrnoException(
+                        "getaddrinfo on " + mCM.getNetworkInfo(network), -errno);
+            }
+        }
+    }
+
+    public void testSetprocnetwork() throws ErrnoException {
+        // Hopefully no prior test in this process space has set a default network.
+        assertNull(mCM.getProcessDefaultNetwork());
+        assertEquals(0, NetworkUtils.getBoundNetworkForProcess());
+
+        for (Network network : getTestableNetworks()) {
+            mCM.setProcessDefaultNetwork(null);
+            assertNull(mCM.getProcessDefaultNetwork());
+
+            int errno = runSetprocnetwork(network.getNetworkHandle());
+            if (errno != 0) {
+                throw new ErrnoException(
+                        "setprocnetwork on " + mCM.getNetworkInfo(network), -errno);
+            }
+            Network processDefault = mCM.getProcessDefaultNetwork();
+            assertNotNull(processDefault);
+            assertEquals(network, processDefault);
+            // TODO: open DatagramSockets, connect them to 192.0.2.1 and 2001:db8::,
+            // and ensure that the source address is in fact on this network as
+            // determined by mCM.getLinkProperties(network).
+
+            mCM.setProcessDefaultNetwork(null);
+        }
+
+        for (Network network : getTestableNetworks()) {
+            NetworkUtils.bindProcessToNetwork(0);
+            assertNull(mCM.getBoundNetworkForProcess());
+
+            int errno = runSetprocnetwork(network.getNetworkHandle());
+            if (errno != 0) {
+                throw new ErrnoException(
+                        "setprocnetwork on " + mCM.getNetworkInfo(network), -errno);
+            }
+            assertEquals(network, new Network(mCM.getBoundNetworkForProcess()));
+            // TODO: open DatagramSockets, connect them to 192.0.2.1 and 2001:db8::,
+            // and ensure that the source address is in fact on this network as
+            // determined by mCM.getLinkProperties(network).
+
+            NetworkUtils.bindProcessToNetwork(0);
+        }
+    }
+
+    public void testSetsocknetwork() throws ErrnoException {
+        for (Network network : getTestableNetworks()) {
+            int errno = runSetsocknetwork(network.getNetworkHandle());
+            if (errno != 0) {
+                throw new ErrnoException(
+                        "setsocknetwork on " + mCM.getNetworkInfo(network), -errno);
+            }
+        }
+    }
+
+    public void testNativeDatagramTransmission() throws ErrnoException {
+        for (Network network : getTestableNetworks()) {
+            int errno = runDatagramCheck(network.getNetworkHandle());
+            if (errno != 0) {
+                throw new ErrnoException(
+                        "DatagramCheck on " + mCM.getNetworkInfo(network), -errno);
+            }
+        }
+    }
+
+    public void testNoSuchNetwork() {
+        final Network eNoNet = new Network(54321);
+        assertNull(mCM.getNetworkInfo(eNoNet));
+
+        final long eNoNetHandle = eNoNet.getNetworkHandle();
+        assertEquals(-OsConstants.ENONET, runSetsocknetwork(eNoNetHandle));
+        assertEquals(-OsConstants.ENONET, runSetprocnetwork(eNoNetHandle));
+        // TODO: correct test permissions so this call is not silently re-mapped
+        // to query on the default network.
+        // assertEquals(-OsConstants.ENONET, runGetaddrinfoCheck(eNoNetHandle));
+    }
+}
diff --git a/tests/cts/net/src/android/net/cts/MultinetworkTest.java b/tests/cts/net/src/android/net/cts/MultinetworkSysctlTest.java
similarity index 96%
rename from tests/cts/net/src/android/net/cts/MultinetworkTest.java
rename to tests/cts/net/src/android/net/cts/MultinetworkSysctlTest.java
index 256c030..c091a13 100644
--- a/tests/cts/net/src/android/net/cts/MultinetworkTest.java
+++ b/tests/cts/net/src/android/net/cts/MultinetworkSysctlTest.java
@@ -27,9 +27,9 @@
 import java.io.IOException;
 
 /**
- * Tests for multinetwork functionality.
+ * Tests for multinetwork sysctl functionality.
  */
-public class MultinetworkTest extends AndroidTestCase {
+public class MultinetworkSysctlTest extends AndroidTestCase {
 
     // Global sysctls. Must be present and set to 1.
     private static final String[] GLOBAL_SYSCTLS = {